/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
+#include <stdbool.h>
#include <sys/systm.h>
+#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/file_internal.h>
#include <sys/dirent.h>
#include <sys/stat.h>
#include <sys/buf.h>
+#include <sys/buf_internal.h>
#include <sys/mount.h>
+#include <sys/vnode_if.h>
#include <sys/vnode_internal.h>
#include <sys/malloc.h>
#include <sys/ubc.h>
+#include <sys/ubc_internal.h>
#include <sys/paths.h>
#include <sys/quota.h>
#include <sys/time.h>
#include <sys/disk.h>
#include <sys/kauth.h>
#include <sys/uio_internal.h>
+#include <sys/fsctl.h>
+#include <sys/xattr.h>
+#include <string.h>
+#include <sys/fsevents.h>
+#include <kern/kalloc.h>
#include <miscfs/specfs/specdev.h>
#include <miscfs/fifofs/fifo.h>
#include <sys/kdebug.h>
#include <sys/sysctl.h>
+#include <stdbool.h>
#include "hfs.h"
#include "hfs_catalog.h"
#include "hfs_mount.h"
#include "hfs_quota.h"
#include "hfs_endian.h"
+#include "hfs_kdebug.h"
+#include "hfs_cprotect.h"
+
#include "hfscommon/headers/BTreesInternal.h"
#include "hfscommon/headers/FileMgrInternal.h"
-#define MAKE_DELETED_NAME(NAME,FID) \
- (void) sprintf((NAME), "%s%d", HFS_DELETE_PREFIX, (FID))
-
#define KNDETACH_VNLOCKED 0x00000001
-#define CARBON_TEMP_DIR_NAME "Cleanup At Startup"
-
-
/* Global vfs data structures for hfs */
/* Always F_FULLFSYNC? 1=yes,0=no (default due to "various" reasons is 'no') */
int always_do_fullfsync = 0;
-SYSCTL_INT (_kern, OID_AUTO, always_do_fullfsync, CTLFLAG_RW, &always_do_fullfsync, 0, "always F_FULLFSYNC when fsync is called");
+SYSCTL_DECL(_vfs_generic);
+SYSCTL_INT (_vfs_generic, OID_AUTO, always_do_fullfsync, CTLFLAG_RW | CTLFLAG_LOCKED, &always_do_fullfsync, 0, "always F_FULLFSYNC when fsync is called");
-extern unsigned long strtoul(const char *, char **, int);
-
-static int hfs_makenode(struct vnode *dvp, struct vnode **vpp,
+int hfs_makenode(struct vnode *dvp, struct vnode **vpp,
struct componentname *cnp, struct vnode_attr *vap,
vfs_context_t ctx);
+int hfs_metasync(struct hfsmount *hfsmp, daddr64_t node, __unused struct proc *p);
+int hfs_metasync_all(struct hfsmount *hfsmp);
+
+int hfs_removedir(struct vnode *, struct vnode *, struct componentname *,
+ int, int);
+int hfs_removefile(struct vnode *, struct vnode *, struct componentname *,
+ int, int, int, struct vnode *, int);
+
+/* Used here and in cnode teardown -- for symlinks */
+int hfs_removefile_callback(struct buf *bp, void *hfsmp);
+
+enum {
+ HFS_MOVE_DATA_INCLUDE_RSRC = 1,
+};
+typedef uint32_t hfs_move_data_options_t;
+
+static int hfs_move_data(cnode_t *from_cp, cnode_t *to_cp,
+ hfs_move_data_options_t options);
+static int hfs_move_fork(filefork_t *srcfork, cnode_t *src,
+ filefork_t *dstfork, cnode_t *dst);
+
+#if HFS_COMPRESSION
+static int hfs_move_compressed(cnode_t *from_vp, cnode_t *to_vp);
+#endif
+
+decmpfs_cnode* hfs_lazy_init_decmpfs_cnode (struct cnode *cp);
+
+#if FIFO
+static int hfsfifo_read(struct vnop_read_args *);
+static int hfsfifo_write(struct vnop_write_args *);
+static int hfsfifo_close(struct vnop_close_args *);
+
+extern int (**fifo_vnodeop_p)(void *);
+#endif /* FIFO */
-static int hfs_metasync(struct hfsmount *hfsmp, daddr64_t node, struct proc *p);
-
-static int hfs_removedir(struct vnode *, struct vnode *, struct componentname *,
- int);
-
-static int hfs_removefile(struct vnode *, struct vnode *, struct componentname *,
- int, int);
-
-static int hfs_vnop_close(struct vnop_close_args*);
-static int hfs_vnop_create(struct vnop_create_args*);
-static int hfs_vnop_exchange(struct vnop_exchange_args*);
-static int hfs_vnop_fsync(struct vnop_fsync_args*);
-static int hfs_vnop_mkdir(struct vnop_mkdir_args*);
-static int hfs_vnop_mknod(struct vnop_mknod_args*);
-static int hfs_vnop_getattr(struct vnop_getattr_args*);
-static int hfs_vnop_open(struct vnop_open_args*);
-static int hfs_vnop_readdir(struct vnop_readdir_args*);
-static int hfs_vnop_remove(struct vnop_remove_args*);
-static int hfs_vnop_rename(struct vnop_rename_args*);
-static int hfs_vnop_rmdir(struct vnop_rmdir_args*);
-static int hfs_vnop_symlink(struct vnop_symlink_args*);
-static int hfs_vnop_setattr(struct vnop_setattr_args*);
+int hfs_vnop_close(struct vnop_close_args*);
+int hfs_vnop_create(struct vnop_create_args*);
+int hfs_vnop_exchange(struct vnop_exchange_args*);
+int hfs_vnop_fsync(struct vnop_fsync_args*);
+int hfs_vnop_mkdir(struct vnop_mkdir_args*);
+int hfs_vnop_mknod(struct vnop_mknod_args*);
+int hfs_vnop_getattr(struct vnop_getattr_args*);
+int hfs_vnop_open(struct vnop_open_args*);
+int hfs_vnop_readdir(struct vnop_readdir_args*);
+int hfs_vnop_remove(struct vnop_remove_args*);
+int hfs_vnop_rename(struct vnop_rename_args*);
+int hfs_vnop_rmdir(struct vnop_rmdir_args*);
+int hfs_vnop_symlink(struct vnop_symlink_args*);
+int hfs_vnop_setattr(struct vnop_setattr_args*);
+int hfs_vnop_readlink(struct vnop_readlink_args *);
+int hfs_vnop_pathconf(struct vnop_pathconf_args *);
+int hfs_vnop_mmap(struct vnop_mmap_args *ap);
+int hfsspec_read(struct vnop_read_args *);
+int hfsspec_write(struct vnop_write_args *);
+int hfsspec_close(struct vnop_close_args *);
/* Options for hfs_removedir and hfs_removefile */
#define HFSRM_SKIP_RESERVE 0x01
-int hfs_write_access(struct vnode *vp, kauth_cred_t cred, struct proc *p, Boolean considerFlags);
-
-int hfs_chmod(struct vnode *vp, int mode, kauth_cred_t cred,
- struct proc *p);
-int hfs_chown(struct vnode *vp, uid_t uid, gid_t gid,
- kauth_cred_t cred, struct proc *p);
/*****************************************************************************
*
*
*****************************************************************************/
+/*
+ * Is the given cnode either the .journal or .journal_info_block file on
+ * a volume with an active journal? Many VNOPs use this to deny access
+ * to those files.
+ *
+ * Note: the .journal file on a volume with an external journal still
+ * returns true here, even though it does not actually hold the contents
+ * of the volume's journal.
+ */
+static _Bool
+hfs_is_journal_file(struct hfsmount *hfsmp, struct cnode *cp)
+{
+ if (hfsmp->jnl != NULL &&
+ (cp->c_fileid == hfsmp->hfs_jnlinfoblkid ||
+ cp->c_fileid == hfsmp->hfs_jnlfileid)) {
+ return true;
+ } else {
+ return false;
+ }
+}
+
/*
* Create a regular file.
*/
-static int
+int
hfs_vnop_create(struct vnop_create_args *ap)
{
+ /*
+ * We leave handling of certain race conditions here to the caller
+ * which will have a better understanding of the semantics it
+ * requires. For example, if it turns out that the file exists,
+ * it would be wrong of us to return a reference to the existing
+ * file because the caller might not want that and it would be
+ * misleading to suggest the file had been created when it hadn't
+ * been. Note that our NFS server code does not set the
+ * VA_EXCLUSIVE flag so you cannot assume that callers don't want
+ * EEXIST errors if it's not set. The common case, where users
+ * are calling open with the O_CREAT mode, is handled in VFS; when
+ * we return EEXIST, it will loop and do the look-up again.
+ */
return hfs_makenode(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap, ap->a_context);
}
/*
* Make device special file.
*/
-static int
+int
hfs_vnop_mknod(struct vnop_mknod_args *ap)
{
struct vnode_attr *vap = ap->a_vap;
return (0);
}
+#if HFS_COMPRESSION
+/*
+ * hfs_ref_data_vp(): returns the data fork vnode for a given cnode.
+ * In the (hopefully rare) case where the data fork vnode is not
+ * present, it will use hfs_vget() to create a new vnode for the
+ * data fork.
+ *
+ * NOTE: If successful and a vnode is returned, the caller is responsible
+ * for releasing the returned vnode with vnode_rele().
+ */
+static int
+hfs_ref_data_vp(struct cnode *cp, struct vnode **data_vp, int skiplock)
+{
+ int vref = 0;
+
+ if (!data_vp || !cp) /* sanity check incoming parameters */
+ return EINVAL;
+
+ /* maybe we should take the hfs cnode lock here, and if so, use the skiplock parameter to tell us not to */
+
+ if (!skiplock) hfs_lock(cp, HFS_SHARED_LOCK, HFS_LOCK_DEFAULT);
+ struct vnode *c_vp = cp->c_vp;
+ if (c_vp) {
+ /* we already have a data vnode */
+ *data_vp = c_vp;
+ vref = vnode_ref(*data_vp);
+ if (!skiplock) hfs_unlock(cp);
+ if (vref == 0) {
+ return 0;
+ }
+ return EINVAL;
+ }
+ /* no data fork vnode in the cnode, so ask hfs for one. */
+
+ if (!cp->c_rsrc_vp) {
+ /* if we don't have either a c_vp or c_rsrc_vp, we can't really do anything useful */
+ *data_vp = NULL;
+ if (!skiplock) hfs_unlock(cp);
+ return EINVAL;
+ }
+
+ if (0 == hfs_vget(VTOHFS(cp->c_rsrc_vp), cp->c_cnid, data_vp, 1, 0) &&
+ 0 != data_vp) {
+ vref = vnode_ref(*data_vp);
+ vnode_put(*data_vp);
+ if (!skiplock) hfs_unlock(cp);
+ if (vref == 0) {
+ return 0;
+ }
+ return EINVAL;
+ }
+ /* there was an error getting the vnode */
+ *data_vp = NULL;
+ if (!skiplock) hfs_unlock(cp);
+ return EINVAL;
+}
+
/*
- * Open a file/directory.
+ * hfs_lazy_init_decmpfs_cnode(): returns the decmpfs_cnode for a cnode,
+ * allocating it if necessary; returns NULL if there was an allocation error.
+ * function is non-static so that it can be used from the FCNTL handler.
+ */
+decmpfs_cnode *
+hfs_lazy_init_decmpfs_cnode(struct cnode *cp)
+{
+ if (!cp->c_decmp) {
+ decmpfs_cnode *dp = NULL;
+ MALLOC_ZONE(dp, decmpfs_cnode *, sizeof(decmpfs_cnode), M_DECMPFS_CNODE, M_WAITOK);
+ if (!dp) {
+ /* error allocating a decmpfs cnode */
+ return NULL;
+ }
+ decmpfs_cnode_init(dp);
+ if (!OSCompareAndSwapPtr(NULL, dp, (void * volatile *)&cp->c_decmp)) {
+ /* another thread got here first, so free the decmpfs_cnode we allocated */
+ decmpfs_cnode_destroy(dp);
+ FREE_ZONE(dp, sizeof(*dp), M_DECMPFS_CNODE);
+ }
+ }
+
+ return cp->c_decmp;
+}
+
+/*
+ * hfs_file_is_compressed(): returns 1 if the file is compressed, and 0 (zero) if not.
+ * if the file's compressed flag is set, makes sure that the decmpfs_cnode field
+ * is allocated by calling hfs_lazy_init_decmpfs_cnode(), then makes sure it is populated,
+ * or else fills it in via the decmpfs_file_is_compressed() function.
+ */
+int
+hfs_file_is_compressed(struct cnode *cp, int skiplock)
+{
+ int ret = 0;
+
+ /* fast check to see if file is compressed. If flag is clear, just answer no */
+ if (!(cp->c_bsdflags & UF_COMPRESSED)) {
+ return 0;
+ }
+
+ decmpfs_cnode *dp = hfs_lazy_init_decmpfs_cnode(cp);
+ if (!dp) {
+ /* error allocating a decmpfs cnode, treat the file as uncompressed */
+ return 0;
+ }
+
+ /* flag was set, see if the decmpfs_cnode state is valid (zero == invalid) */
+ uint32_t decmpfs_state = decmpfs_cnode_get_vnode_state(dp);
+ switch(decmpfs_state) {
+ case FILE_IS_COMPRESSED:
+ case FILE_IS_CONVERTING: /* treat decompressing files as if they are compressed */
+ return 1;
+ case FILE_IS_NOT_COMPRESSED:
+ return 0;
+ /* otherwise the state is not cached yet */
+ }
+
+ /* decmpfs hasn't seen this file yet, so call decmpfs_file_is_compressed() to init the decmpfs_cnode struct */
+ struct vnode *data_vp = NULL;
+ if (0 == hfs_ref_data_vp(cp, &data_vp, skiplock)) {
+ if (data_vp) {
+ ret = decmpfs_file_is_compressed(data_vp, VTOCMP(data_vp)); // fill in decmpfs_cnode
+ vnode_rele(data_vp);
+ }
+ }
+ return ret;
+}
+
+/* hfs_uncompressed_size_of_compressed_file() - get the uncompressed size of the file.
+ * if the caller has passed a valid vnode (has a ref count > 0), then hfsmp and fid are not required.
+ * if the caller doesn't have a vnode, pass NULL in vp, and pass valid hfsmp and fid.
+ * files size is returned in size (required)
+ * if the indicated file is a directory (or something that doesn't have a data fork), then this call
+ * will return an error and the caller should fall back to treating the item as an uncompressed file
*/
+int
+hfs_uncompressed_size_of_compressed_file(struct hfsmount *hfsmp, struct vnode *vp, cnid_t fid, off_t *size, int skiplock)
+{
+ int ret = 0;
+ int putaway = 0; /* flag to remember if we used hfs_vget() */
+
+ if (!size) {
+ return EINVAL; /* no place to put the file size */
+ }
+
+ if (NULL == vp) {
+ if (!hfsmp || !fid) { /* make sure we have the required parameters */
+ return EINVAL;
+ }
+ if (0 != hfs_vget(hfsmp, fid, &vp, skiplock, 0)) { /* vnode is null, use hfs_vget() to get it */
+ vp = NULL;
+ } else {
+ putaway = 1; /* note that hfs_vget() was used to aquire the vnode */
+ }
+ }
+ /* this double check for compression (hfs_file_is_compressed)
+ * ensures the cached size is present in case decmpfs hasn't
+ * encountered this node yet.
+ */
+ if (vp) {
+ if (hfs_file_is_compressed(VTOC(vp), skiplock) ) {
+ *size = decmpfs_cnode_get_vnode_cached_size(VTOCMP(vp)); /* file info will be cached now, so get size */
+ } else {
+ if (VTOCMP(vp) && VTOCMP(vp)->cmp_type >= CMP_MAX) {
+ if (VTOCMP(vp)->cmp_type != DATALESS_CMPFS_TYPE) {
+ // if we don't recognize this type, just use the real data fork size
+ if (VTOC(vp)->c_datafork) {
+ *size = VTOC(vp)->c_datafork->ff_size;
+ ret = 0;
+ } else {
+ ret = EINVAL;
+ }
+ } else {
+ *size = decmpfs_cnode_get_vnode_cached_size(VTOCMP(vp)); /* file info will be cached now, so get size */
+ ret = 0;
+ }
+ } else {
+ ret = EINVAL;
+ }
+ }
+ }
+
+ if (putaway) { /* did we use hfs_vget() to get this vnode? */
+ vnode_put(vp); /* if so, release it and set it to null */
+ vp = NULL;
+ }
+ return ret;
+}
+
+int
+hfs_hides_rsrc(vfs_context_t ctx, struct cnode *cp, int skiplock)
+{
+ if (ctx == decmpfs_ctx)
+ return 0;
+ if (!hfs_file_is_compressed(cp, skiplock))
+ return 0;
+ return decmpfs_hides_rsrc(ctx, cp->c_decmp);
+}
+
+int
+hfs_hides_xattr(vfs_context_t ctx, struct cnode *cp, const char *name, int skiplock)
+{
+ if (ctx == decmpfs_ctx)
+ return 0;
+ if (!hfs_file_is_compressed(cp, skiplock))
+ return 0;
+ return decmpfs_hides_xattr(ctx, cp->c_decmp, name);
+}
+#endif /* HFS_COMPRESSION */
+
+
+//
+// This function gets the doc_tombstone structure for the
+// current thread. If the thread doesn't have one, the
+// structure is allocated.
+//
+static struct doc_tombstone *
+get_uthread_doc_tombstone(void)
+{
+ struct uthread *ut;
+ ut = get_bsdthread_info(current_thread());
+
+ if (ut->t_tombstone == NULL) {
+ ut->t_tombstone = kalloc(sizeof(struct doc_tombstone));
+ if (ut->t_tombstone) {
+ memset(ut->t_tombstone, 0, sizeof(struct doc_tombstone));
+ }
+ }
+
+ return ut->t_tombstone;
+}
+
+//
+// This routine clears out the current tombstone for the
+// current thread and if necessary passes the doc-id of
+// the tombstone on to the dst_cnode.
+//
+// If the doc-id transfers to dst_cnode, we also generate
+// a doc-id changed fsevent. Unlike all the other fsevents,
+// doc-id changed events can only be generated here in HFS
+// where we have the necessary info.
+//
+static void
+clear_tombstone_docid(struct doc_tombstone *ut, __unused struct hfsmount *hfsmp, struct cnode *dst_cnode)
+{
+ uint32_t old_id = ut->t_lastop_document_id;
+
+ ut->t_lastop_document_id = 0;
+ ut->t_lastop_parent = NULL;
+ ut->t_lastop_parent_vid = 0;
+ ut->t_lastop_filename[0] = '\0';
+
+ //
+ // If the lastop item is still the same and needs to be cleared,
+ // clear it.
+ //
+ if (dst_cnode && old_id && ut->t_lastop_item && vnode_vid(ut->t_lastop_item) == ut->t_lastop_item_vid) {
+ //
+ // clear the document_id from the file that used to have it.
+ // XXXdbg - we need to lock the other vnode and make sure to
+ // update it on disk.
+ //
+ struct cnode *ocp = VTOC(ut->t_lastop_item);
+ struct FndrExtendedFileInfo *ofip = (struct FndrExtendedFileInfo *)((char *)&ocp->c_attr.ca_finderinfo + 16);
+
+ // printf("clearing doc-id from ino %d\n", ocp->c_desc.cd_cnid);
+ ofip->document_id = 0;
+ ocp->c_bsdflags &= ~UF_TRACKED;
+ ocp->c_flag |= C_MODIFIED;
+ /* cat_update(hfsmp, &ocp->c_desc, &ocp->c_attr, NULL, NULL); */
+
+ }
+
+#if CONFIG_FSE
+ if (dst_cnode && old_id) {
+ struct FndrExtendedFileInfo *fip = (struct FndrExtendedFileInfo *)((char *)&dst_cnode->c_attr.ca_finderinfo + 16);
+
+ add_fsevent(FSE_DOCID_CHANGED, vfs_context_current(),
+ FSE_ARG_DEV, hfsmp->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)ut->t_lastop_fileid, // src inode #
+ FSE_ARG_INO, (ino64_t)dst_cnode->c_fileid, // dst inode #
+ FSE_ARG_INT32, (uint32_t)fip->document_id,
+ FSE_ARG_DONE);
+ }
+#endif
+ // last, clear these now that we're all done
+ ut->t_lastop_item = NULL;
+ ut->t_lastop_fileid = 0;
+ ut->t_lastop_item_vid = 0;
+}
+
+
+//
+// This function is used to filter out operations on temp
+// filenames. We have to filter out operations on certain
+// temp filenames to work-around questionable application
+// behavior from apps like Autocad that perform unusual
+// sequences of file system operations for a "safe save".
+static int
+is_ignorable_temp_name(const char *nameptr, int len)
+{
+ if (len == 0) {
+ len = strlen(nameptr);
+ }
+
+ if ( strncmp(nameptr, "atmp", 4) == 0
+ || (len > 4 && strncmp(nameptr+len-4, ".bak", 4) == 0)
+ || (len > 4 && strncmp(nameptr+len-4, ".tmp", 4) == 0)) {
+ return 1;
+ }
+
+ return 0;
+}
+
+//
+// Decide if we need to save a tombstone or not. Normally we always
+// save a tombstone - but if there already is one and the name we're
+// given is an ignorable name, then we will not save a tombstone.
+//
static int
+should_save_docid_tombstone(struct doc_tombstone *ut, struct vnode *vp, struct componentname *cnp)
+{
+ if (cnp->cn_nameptr == NULL) {
+ return 0;
+ }
+
+ if (ut->t_lastop_document_id && ut->t_lastop_item == vp && is_ignorable_temp_name(cnp->cn_nameptr, cnp->cn_namelen)) {
+ return 0;
+ }
+
+ return 1;
+}
+
+
+//
+// This function saves a tombstone for the given vnode and name. The
+// tombstone represents the parent directory and name where the document
+// used to live and the document-id of that file. This info is recorded
+// in the doc_tombstone structure hanging off the uthread (which assumes
+// that all safe-save operations happen on the same thread).
+//
+// If later on the same parent/name combo comes back into existence then
+// we'll preserve the doc-id from this vnode onto the new vnode.
+//
+static void
+save_tombstone(struct hfsmount *hfsmp, struct vnode *dvp, struct vnode *vp, struct componentname *cnp, int for_unlink)
+{
+ struct cnode *cp = VTOC(vp);
+ struct doc_tombstone *ut;
+ ut = get_uthread_doc_tombstone();
+
+ if (for_unlink && vp->v_type == VREG && cp->c_linkcount > 1) {
+ //
+ // a regular file that is being unlinked and that is also
+ // hardlinked should not clear the UF_TRACKED state or
+ // mess with the tombstone because somewhere else in the
+ // file system the file is still alive.
+ //
+ return;
+ }
+
+ ut->t_lastop_parent = dvp;
+ ut->t_lastop_parent_vid = vnode_vid(dvp);
+ ut->t_lastop_fileid = cp->c_fileid;
+ if (for_unlink) {
+ ut->t_lastop_item = NULL;
+ ut->t_lastop_item_vid = 0;
+ } else {
+ ut->t_lastop_item = vp;
+ ut->t_lastop_item_vid = vnode_vid(vp);
+ }
+
+ strlcpy((char *)&ut->t_lastop_filename[0], cnp->cn_nameptr, sizeof(ut->t_lastop_filename));
+
+ struct FndrExtendedFileInfo *fip = (struct FndrExtendedFileInfo *)((char *)&cp->c_attr.ca_finderinfo + 16);
+ ut->t_lastop_document_id = fip->document_id;
+
+ if (for_unlink) {
+ // clear this so it's never returned again
+ fip->document_id = 0;
+ cp->c_bsdflags &= ~UF_TRACKED;
+
+ if (ut->t_lastop_document_id) {
+ (void) cat_update(hfsmp, &cp->c_desc, &cp->c_attr, NULL, NULL);
+
+#if CONFIG_FSE
+ // this event is more of a "pending-delete"
+ add_fsevent(FSE_DOCID_CHANGED, vfs_context_current(),
+ FSE_ARG_DEV, hfsmp->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)cp->c_fileid, // src inode #
+ FSE_ARG_INO, (ino64_t)0, // dst inode #
+ FSE_ARG_INT32, ut->t_lastop_document_id, // document id
+ FSE_ARG_DONE);
+#endif
+ }
+ }
+}
+
+
+/*
+ * Open a file/directory.
+ */
+int
hfs_vnop_open(struct vnop_open_args *ap)
{
struct vnode *vp = ap->a_vp;
struct filefork *fp;
struct timeval tv;
int error;
+ static int past_bootup = 0;
+ struct cnode *cp = VTOC(vp);
+ struct hfsmount *hfsmp = VTOHFS(vp);
+
+#if HFS_COMPRESSION
+ if (ap->a_mode & FWRITE) {
+ /* open for write */
+ if ( hfs_file_is_compressed(cp, 1) ) { /* 1 == don't take the cnode lock */
+ /* opening a compressed file for write, so convert it to decompressed */
+ struct vnode *data_vp = NULL;
+ error = hfs_ref_data_vp(cp, &data_vp, 1); /* 1 == don't take the cnode lock */
+ if (0 == error) {
+ if (data_vp) {
+ error = decmpfs_decompress_file(data_vp, VTOCMP(data_vp), -1, 1, 0);
+ vnode_rele(data_vp);
+ } else {
+ error = EINVAL;
+ }
+ }
+ if (error != 0)
+ return error;
+ }
+ } else {
+ /* open for read */
+ if (hfs_file_is_compressed(cp, 1) ) { /* 1 == don't take the cnode lock */
+ if (VNODE_IS_RSRC(vp)) {
+ /* opening the resource fork of a compressed file, so nothing to do */
+ } else {
+ /* opening a compressed file for read, make sure it validates */
+ error = decmpfs_validate_compressed_file(vp, VTOCMP(vp));
+ if (error != 0)
+ return error;
+ }
+ }
+ }
+#endif
/*
* Files marked append-only must be opened for appending.
*/
- if ((VTOC(vp)->c_flags & APPEND) && !vnode_isdir(vp) &&
+ if ((cp->c_bsdflags & APPEND) && !vnode_isdir(vp) &&
(ap->a_mode & (FWRITE | O_APPEND)) == FWRITE)
return (EPERM);
if (vnode_isreg(vp) && !UBCINFOEXISTS(vp))
return (EBUSY); /* file is in use by the kernel */
- /* Don't allow journal file to be opened externally. */
- if (VTOC(vp)->c_fileid == VTOHFS(vp)->hfs_jnlfileid)
+ /* Don't allow journal to be opened externally. */
+ if (hfs_is_journal_file(hfsmp, cp))
return (EPERM);
- /*
- * On the first (non-busy) open of a fragmented
- * file attempt to de-frag it (if its less than 20MB).
- */
- if ((VTOHFS(vp)->hfs_flags & HFS_READ_ONLY) ||
- (VTOHFS(vp)->jnl == NULL) ||
+
+ bool have_lock = false;
+
+#if CONFIG_PROTECT
+ if (ISSET(ap->a_mode, FENCRYPTED) && cp->c_cpentry && vnode_isreg(vp)) {
+ bool have_trunc_lock = false;
+
+
+ if ((error = hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
+ if (have_trunc_lock)
+ hfs_unlock_truncate(cp, 0);
+ return error;
+ }
+
+ have_lock = true;
+
+ if (cp->c_cpentry->cp_raw_open_count + 1
+ < cp->c_cpentry->cp_raw_open_count) {
+ // Overflow; too many raw opens on this file
+ hfs_unlock(cp);
+ if (have_trunc_lock)
+ hfs_unlock_truncate(cp, 0);
+ return ENFILE;
+ }
+
+
+ if (have_trunc_lock)
+ hfs_unlock_truncate(cp, 0);
+
+ ++cp->c_cpentry->cp_raw_open_count;
+ }
+#endif
+
+ if ((hfsmp->hfs_flags & HFS_READ_ONLY) ||
+ (hfsmp->jnl == NULL) ||
+#if NAMEDSTREAMS
+ !vnode_isreg(vp) || vnode_isinuse(vp, 0) || vnode_isnamedstream(vp)) {
+#else
!vnode_isreg(vp) || vnode_isinuse(vp, 0)) {
+#endif
+
+#if CONFIG_PROTECT
+ if (have_lock)
+ hfs_unlock(cp);
+#endif
+
return (0);
}
- if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK)))
+ if (!have_lock && (error = hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT)))
return (error);
+
+#if QUOTA
+ /* If we're going to write to the file, initialize quotas. */
+ if ((ap->a_mode & FWRITE) && (hfsmp->hfs_flags & HFS_QUOTAS))
+ (void)hfs_getinoquota(cp);
+#endif /* QUOTA */
+
+ /*
+ * On the first (non-busy) open of a fragmented
+ * file attempt to de-frag it (if its less than 20MB).
+ */
fp = VTOF(vp);
if (fp->ff_blocks &&
fp->ff_extents[7].blockCount != 0 &&
fp->ff_size <= (20 * 1024 * 1024)) {
+ int no_mods = 0;
+ struct timeval now;
/*
* Wait until system bootup is done (3 min).
+ * And don't relocate a file that's been modified
+ * within the past minute -- this can lead to
+ * system thrashing.
*/
- microuptime(&tv);
- if (tv.tv_sec > (60 * 3)) {
- (void) hfs_relocate(vp, VTOVCB(vp)->nextAllocation + 4096,
- vfs_context_ucred(ap->a_context),
- vfs_context_proc(ap->a_context));
+
+ if (!past_bootup) {
+ microuptime(&tv);
+ if (tv.tv_sec > (60*3)) {
+ past_bootup = 1;
+ }
+ }
+
+ microtime(&now);
+ if ((now.tv_sec - cp->c_mtime) > 60) {
+ no_mods = 1;
+ }
+
+ if (past_bootup && no_mods) {
+ (void) hfs_relocate(vp, hfsmp->nextAllocation + 4096,
+ vfs_context_ucred(ap->a_context),
+ vfs_context_proc(ap->a_context));
}
}
- hfs_unlock(VTOC(vp));
+
+ hfs_unlock(cp);
return (0);
}
/*
* Close a file/directory.
*/
-static int
+int
hfs_vnop_close(ap)
struct vnop_close_args /* {
struct vnode *a_vp;
struct proc *p = vfs_context_proc(ap->a_context);
struct hfsmount *hfsmp;
int busy;
+ int tooktrunclock = 0;
+ int knownrefs = 0;
- if ( hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK) != 0)
+ if ( hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT) != 0)
return (0);
cp = VTOC(vp);
hfsmp = VTOHFS(vp);
+#if CONFIG_PROTECT
+ if (cp->c_cpentry && ISSET(ap->a_fflag, FENCRYPTED) && vnode_isreg(vp)) {
+ assert(cp->c_cpentry->cp_raw_open_count > 0);
+ --cp->c_cpentry->cp_raw_open_count;
+ }
+#endif
+
+ /*
+ * If the rsrc fork is a named stream, it can cause the data fork to
+ * stay around, preventing de-allocation of these blocks.
+ * Do checks for truncation on close. Purge extra extents if they exist.
+ * Make sure the vp is not a directory, and that it has a resource fork,
+ * and that resource fork is also a named stream.
+ */
+
+ if ((vp->v_type == VREG) && (cp->c_rsrc_vp)
+ && (vnode_isnamedstream(cp->c_rsrc_vp))) {
+ uint32_t blks;
+
+ blks = howmany(VTOF(vp)->ff_size, VTOVCB(vp)->blockSize);
+ /*
+ * If there are extra blocks and there are only 2 refs on
+ * this vp (ourselves + rsrc fork holding ref on us), go ahead
+ * and try to truncate.
+ */
+ if ((blks < VTOF(vp)->ff_blocks) && (!vnode_isinuse(vp, 2))) {
+ // release cnode lock; must acquire truncate lock BEFORE cnode lock
+ hfs_unlock(cp);
+
+ hfs_lock_truncate(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ tooktrunclock = 1;
+
+ if (hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT) != 0) {
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
+ // bail out if we can't re-acquire cnode lock
+ return 0;
+ }
+ // now re-test to make sure it's still valid
+ if (cp->c_rsrc_vp) {
+ knownrefs = 1 + vnode_isnamedstream(cp->c_rsrc_vp);
+ if (!vnode_isinuse(vp, knownrefs)){
+ // now we can truncate the file, if necessary
+ blks = howmany(VTOF(vp)->ff_size, VTOVCB(vp)->blockSize);
+ if (blks < VTOF(vp)->ff_blocks){
+ (void) hfs_truncate(vp, VTOF(vp)->ff_size, IO_NDELAY,
+ 0, ap->a_context);
+ }
+ }
+ }
+ }
+ }
+
+
// if we froze the fs and we're exiting, then "thaw" the fs
- if (hfsmp->hfs_freezing_proc == p && proc_exiting(p)) {
- hfsmp->hfs_freezing_proc = NULL;
- hfs_global_exclusive_lock_release(hfsmp);
- lck_rw_unlock_exclusive(&hfsmp->hfs_insync);
+ if (hfsmp->hfs_freeze_state == HFS_FROZEN
+ && hfsmp->hfs_freezing_proc == p && proc_exiting(p)) {
+ hfs_thaw(hfsmp, p);
}
busy = vnode_isinuse(vp, 1);
vnode_recycle(vp);
}
+ if (tooktrunclock){
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
+ }
hfs_unlock(cp);
+
+ if (ap->a_fflag & FWASWRITTEN) {
+ hfs_sync_ejectable(hfsmp);
+ }
+
return (0);
}
+static bool hfs_should_generate_document_id(hfsmount_t *hfsmp, cnode_t *cp)
+{
+ return (!ISSET(hfsmp->hfs_flags, HFS_READ_ONLY)
+ && ISSET(cp->c_bsdflags, UF_TRACKED)
+ && cp->c_desc.cd_cnid != kHFSRootFolderID
+ && (S_ISDIR(cp->c_mode) || S_ISREG(cp->c_mode) || S_ISLNK(cp->c_mode)));
+}
+
/*
* Get basic attributes.
*/
-static int
+int
hfs_vnop_getattr(struct vnop_getattr_args *ap)
{
+#define VNODE_ATTR_TIMES \
+ (VNODE_ATTR_va_access_time|VNODE_ATTR_va_change_time|VNODE_ATTR_va_modify_time)
+#define VNODE_ATTR_AUTH \
+ (VNODE_ATTR_va_mode | VNODE_ATTR_va_uid | VNODE_ATTR_va_gid | \
+ VNODE_ATTR_va_flags | VNODE_ATTR_va_acl)
+
struct vnode *vp = ap->a_vp;
struct vnode_attr *vap = ap->a_vap;
- struct vnode *rvp = NULL;
+ struct vnode *rvp = NULLVP;
struct hfsmount *hfsmp;
struct cnode *cp;
+ uint64_t data_size;
enum vtype v_type;
int error = 0;
-
- if ((error = hfs_lock(VTOC(vp), HFS_SHARED_LOCK))) {
- return (error);
- }
cp = VTOC(vp);
- hfsmp = VTOHFS(vp);
- hfs_touchtimes(hfsmp, cp);
- v_type = vnode_vtype(vp);
- VATTR_RETURN(vap, va_rdev, (v_type == VBLK || v_type == VCHR) ? cp->c_rdev : 0);
+#if HFS_COMPRESSION
+ /* we need to inspect the decmpfs state of the file before we take the hfs cnode lock */
+ int compressed = 0;
+ int hide_size = 0;
+ off_t uncompressed_size = -1;
+ if (VATTR_IS_ACTIVE(vap, va_data_size) || VATTR_IS_ACTIVE(vap, va_total_alloc) || VATTR_IS_ACTIVE(vap, va_data_alloc) || VATTR_IS_ACTIVE(vap, va_total_size)) {
+ /* we only care about whether the file is compressed if asked for the uncompressed size */
+ if (VNODE_IS_RSRC(vp)) {
+ /* if it's a resource fork, decmpfs may want us to hide the size */
+ hide_size = hfs_hides_rsrc(ap->a_context, cp, 0);
+ } else {
+ /* if it's a data fork, we need to know if it was compressed so we can report the uncompressed size */
+ compressed = hfs_file_is_compressed(cp, 0);
+ }
+ if ((VATTR_IS_ACTIVE(vap, va_data_size) || VATTR_IS_ACTIVE(vap, va_total_size))) {
+ // if it's compressed
+ if (compressed || (!VNODE_IS_RSRC(vp) && cp->c_decmp && cp->c_decmp->cmp_type >= CMP_MAX)) {
+ if (0 != hfs_uncompressed_size_of_compressed_file(NULL, vp, 0, &uncompressed_size, 0)) {
+ /* failed to get the uncompressed size, we'll check for this later */
+ uncompressed_size = -1;
+ } else {
+ // fake that it's compressed
+ compressed = 1;
+ }
+ }
+ }
+ }
+#endif
+
+ /*
+ * Shortcut for vnode_authorize path. Each of the attributes
+ * in this set is updated atomically so we don't need to take
+ * the cnode lock to access them.
+ */
+ if ((vap->va_active & ~VNODE_ATTR_AUTH) == 0) {
+ /* Make sure file still exists. */
+ if (cp->c_flag & C_NOEXISTS)
+ return (ENOENT);
+
+ vap->va_uid = cp->c_uid;
+ vap->va_gid = cp->c_gid;
+ vap->va_mode = cp->c_mode;
+ vap->va_flags = cp->c_bsdflags;
+ vap->va_supported |= VNODE_ATTR_AUTH & ~VNODE_ATTR_va_acl;
+
+ if ((cp->c_attr.ca_recflags & kHFSHasSecurityMask) == 0) {
+ vap->va_acl = (kauth_acl_t) KAUTH_FILESEC_NONE;
+ VATTR_SET_SUPPORTED(vap, va_acl);
+ }
+
+ return (0);
+ }
+
+ hfsmp = VTOHFS(vp);
+ v_type = vnode_vtype(vp);
+
+ if (VATTR_IS_ACTIVE(vap, va_document_id)) {
+ uint32_t document_id;
+
+ if (cp->c_desc.cd_cnid == kHFSRootFolderID)
+ document_id = kHFSRootFolderID;
+ else {
+ /*
+ * This is safe without a lock because we're just reading
+ * a 32 bit aligned integer which should be atomic on all
+ * platforms we support.
+ */
+ document_id = hfs_get_document_id(cp);
+
+ if (!document_id && hfs_should_generate_document_id(hfsmp, cp)) {
+ uint32_t new_document_id;
+
+ error = hfs_generate_document_id(hfsmp, &new_document_id);
+ if (error)
+ return error;
+
+ error = hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ if (error)
+ return error;
+
+ bool want_docid_fsevent = false;
+
+ // Need to check again now that we have the lock
+ document_id = hfs_get_document_id(cp);
+ if (!document_id && hfs_should_generate_document_id(hfsmp, cp)) {
+ cp->c_attr.ca_finderextendeddirinfo.document_id = document_id = new_document_id;
+ want_docid_fsevent = true;
+ SET(cp->c_flag, C_MODIFIED);
+ }
+
+ hfs_unlock(cp);
+
+ if (want_docid_fsevent) {
+#if CONFIG_FSE
+ add_fsevent(FSE_DOCID_CHANGED, ap->a_context,
+ FSE_ARG_DEV, hfsmp->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)0, // src inode #
+ FSE_ARG_INO, (ino64_t)cp->c_fileid, // dst inode #
+ FSE_ARG_INT32, document_id,
+ FSE_ARG_DONE);
+
+ if (need_fsevent(FSE_STAT_CHANGED, vp)) {
+ add_fsevent(FSE_STAT_CHANGED, ap->a_context,
+ FSE_ARG_VNODE, vp, FSE_ARG_DONE);
+ }
+#endif
+ }
+ }
+ }
+
+ vap->va_document_id = document_id;
+ VATTR_SET_SUPPORTED(vap, va_document_id);
+ }
+
+ /*
+ * If time attributes are requested and we have cnode times
+ * that require updating, then acquire an exclusive lock on
+ * the cnode before updating the times. Otherwise we can
+ * just acquire a shared lock.
+ */
+ if ((vap->va_active & VNODE_ATTR_TIMES) &&
+ (cp->c_touch_acctime || cp->c_touch_chgtime || cp->c_touch_modtime)) {
+ if ((error = hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT)))
+ return (error);
+ hfs_touchtimes(hfsmp, cp);
+
+ // downgrade to a shared lock since that's all we need from here on out
+ cp->c_lockowner = HFS_SHARED_OWNER;
+ lck_rw_lock_exclusive_to_shared(&cp->c_rwlock);
+
+ } else if ((error = hfs_lock(cp, HFS_SHARED_LOCK, HFS_LOCK_DEFAULT))) {
+ return (error);
+ }
+
if (v_type == VDIR) {
+ data_size = (cp->c_entries + 2) * AVERAGE_HFSDIRENTRY_SIZE;
+
if (VATTR_IS_ACTIVE(vap, va_nlink)) {
- int entries;
+ int nlink;
- entries = cp->c_nlink;
- if (vnode_isvroot(vp)) {
- if (hfsmp->hfs_privdir_desc.cd_cnid != 0)
- --entries; /* hide private dir */
- if (hfsmp->jnl || ((HFSTOVCB(hfsmp)->vcbAtrb & kHFSVolumeJournaledMask) && (hfsmp->hfs_flags & HFS_READ_ONLY)))
- entries -= 2; /* hide the journal files */
+ /*
+ * For directories, the va_nlink is esentially a count
+ * of the ".." references to a directory plus the "."
+ * reference and the directory itself. So for HFS+ this
+ * becomes the sub-directory count plus two.
+ *
+ * In the absence of a sub-directory count we use the
+ * directory's item count. This will be too high in
+ * most cases since it also includes files.
+ */
+ if ((hfsmp->hfs_flags & HFS_FOLDERCOUNT) &&
+ (cp->c_attr.ca_recflags & kHFSHasFolderCountMask))
+ nlink = cp->c_attr.ca_dircount; /* implied ".." entries */
+ else
+ nlink = cp->c_entries;
+
+ /* Account for ourself and our "." entry */
+ nlink += 2;
+ /* Hide our private directories. */
+ if (cp->c_cnid == kHFSRootFolderID) {
+ if (hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid != 0) {
+ --nlink;
+ }
+ if (hfsmp->hfs_private_desc[DIR_HARDLINKS].cd_cnid != 0) {
+ --nlink;
+ }
}
- VATTR_RETURN(vap, va_nlink, (uint64_t)entries);
- }
-
+ VATTR_RETURN(vap, va_nlink, (u_int64_t)nlink);
+ }
if (VATTR_IS_ACTIVE(vap, va_nchildren)) {
int entries;
entries = cp->c_entries;
- if (vnode_isvroot(vp)) {
- if (hfsmp->hfs_privdir_desc.cd_cnid != 0)
- --entries; /* hide private dir */
- if (hfsmp->jnl)
- entries -= 2; /* hide the journal files */
+ /* Hide our private files and directories. */
+ if (cp->c_cnid == kHFSRootFolderID) {
+ if (hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid != 0)
+ --entries;
+ if (hfsmp->hfs_private_desc[DIR_HARDLINKS].cd_cnid != 0)
+ --entries;
+ if (hfsmp->jnl || ((hfsmp->vcbAtrb & kHFSVolumeJournaledMask) && (hfsmp->hfs_flags & HFS_READ_ONLY)))
+ entries -= 2; /* hide the journal files */
}
VATTR_RETURN(vap, va_nchildren, entries);
}
- } else {
- VATTR_RETURN(vap, va_nlink, (uint64_t)cp->c_nlink);
+ /*
+ * The va_dirlinkcount is the count of real directory hard links.
+ * (i.e. its not the sum of the implied "." and ".." references)
+ */
+ if (VATTR_IS_ACTIVE(vap, va_dirlinkcount)) {
+ VATTR_RETURN(vap, va_dirlinkcount, (uint32_t)cp->c_linkcount);
+ }
+ } else /* !VDIR */ {
+ data_size = VCTOF(vp, cp)->ff_size;
+
+ VATTR_RETURN(vap, va_nlink, (u_int64_t)cp->c_linkcount);
+ if (VATTR_IS_ACTIVE(vap, va_data_alloc)) {
+ u_int64_t blocks;
+
+#if HFS_COMPRESSION
+ if (hide_size) {
+ VATTR_RETURN(vap, va_data_alloc, 0);
+ } else if (compressed) {
+ /* for compressed files, we report all allocated blocks as belonging to the data fork */
+ blocks = cp->c_blocks;
+ VATTR_RETURN(vap, va_data_alloc, blocks * (u_int64_t)hfsmp->blockSize);
+ }
+ else
+#endif
+ {
+ blocks = VCTOF(vp, cp)->ff_blocks;
+ VATTR_RETURN(vap, va_data_alloc, blocks * (u_int64_t)hfsmp->blockSize);
+ }
+ }
}
/* conditional because 64-bit arithmetic can be expensive */
if (VATTR_IS_ACTIVE(vap, va_total_size)) {
if (v_type == VDIR) {
- VATTR_RETURN(vap, va_total_size, cp->c_nlink * AVERAGE_HFSDIRENTRY_SIZE);
+ VATTR_RETURN(vap, va_total_size, (cp->c_entries + 2) * AVERAGE_HFSDIRENTRY_SIZE);
} else {
- uint64_t total_size = 0;
+ u_int64_t total_size = ~0ULL;
struct cnode *rcp;
-
- if (cp->c_datafork) {
- total_size = cp->c_datafork->ff_size;
+#if HFS_COMPRESSION
+ if (hide_size) {
+ /* we're hiding the size of this file, so just return 0 */
+ total_size = 0;
+ } else if (compressed) {
+ if (uncompressed_size == -1) {
+ /*
+ * We failed to get the uncompressed size above,
+ * so we'll fall back to the standard path below
+ * since total_size is still -1
+ */
+ } else {
+ /* use the uncompressed size we fetched above */
+ total_size = uncompressed_size;
+ }
}
-
- if (cp->c_blocks - VTOF(vp)->ff_blocks) {
- /* hfs_vgetrsrc does not use struct proc - therefore passing NULL */
- error = hfs_vgetrsrc(hfsmp, vp, &rvp, NULL);
- if (error) {
- goto out;
+#endif
+ if (total_size == ~0ULL) {
+ if (cp->c_datafork) {
+ total_size = cp->c_datafork->ff_size;
}
-
- rcp = VTOC(rvp);
- if (rcp && rcp->c_rsrcfork) {
- total_size += rcp->c_rsrcfork->ff_size;
+
+ if (cp->c_blocks - VTOF(vp)->ff_blocks) {
+ /* We deal with rsrc fork vnode iocount at the end of the function */
+ error = hfs_vgetrsrc(hfsmp, vp, &rvp);
+ if (error) {
+ /*
+ * Note that we call hfs_vgetrsrc with error_on_unlinked
+ * set to FALSE. This is because we may be invoked via
+ * fstat() on an open-unlinked file descriptor and we must
+ * continue to support access to the rsrc fork until it disappears.
+ * The code at the end of this function will be
+ * responsible for releasing the iocount generated by
+ * hfs_vgetrsrc. This is because we can't drop the iocount
+ * without unlocking the cnode first.
+ */
+ goto out;
+ }
+
+ rcp = VTOC(rvp);
+ if (rcp && rcp->c_rsrcfork) {
+ total_size += rcp->c_rsrcfork->ff_size;
+ }
}
}
-
+
VATTR_RETURN(vap, va_total_size, total_size);
- /* Include size of attibute data (extents), if any */
- if (cp->c_attrblks) {
- vap->va_total_size += (uint64_t)cp->c_attrblks * (uint64_t)hfsmp->blockSize;
- }
}
}
if (VATTR_IS_ACTIVE(vap, va_total_alloc)) {
if (v_type == VDIR) {
VATTR_RETURN(vap, va_total_alloc, 0);
} else {
- VATTR_RETURN(vap, va_total_alloc, (uint64_t)cp->c_blocks * (uint64_t)hfsmp->blockSize);
- /* Include size of attibute data (extents), if any */
- if (cp->c_attrblks) {
- vap->va_total_alloc += (uint64_t)cp->c_attrblks * (uint64_t)hfsmp->blockSize;
- }
+ VATTR_RETURN(vap, va_total_alloc, (u_int64_t)cp->c_blocks * (u_int64_t)hfsmp->blockSize);
}
}
- /* XXX broken... if ask for "data size" of rsrc fork vp you get rsrc fork size! */
- if (v_type == VDIR) {
- VATTR_RETURN(vap, va_data_size, cp->c_nlink * AVERAGE_HFSDIRENTRY_SIZE);
- } else {
- VATTR_RETURN(vap, va_data_size, VTOF(vp)->ff_size);
- }
- if (VATTR_IS_ACTIVE(vap, va_data_alloc) && (v_type != VDIR)) {
- /* XXX do we need to account for ff_unallocblocks ? */
- VATTR_RETURN(vap, va_data_alloc, (uint64_t)VTOF(vp)->ff_blocks * (uint64_t)hfsmp->blockSize);
- }
- /* XXX is this really a good 'optimal I/O size'? */
- VATTR_RETURN(vap, va_iosize, hfsmp->hfs_logBlockSize);
- VATTR_RETURN(vap, va_uid, cp->c_uid);
- VATTR_RETURN(vap, va_gid, cp->c_gid);
- VATTR_RETURN(vap, va_mode, cp->c_mode);
-#if 0
- /* XXX is S_IFXATTR still needed ??? */
- if (VNODE_IS_RSRC(vp))
- vap->va_mode |= S_IFXATTR;
-#endif
- VATTR_RETURN(vap, va_flags, cp->c_flags);
/*
* If the VFS wants extended security data, and we know that we
*/
if (VATTR_IS_ACTIVE(vap, va_acl)) {
if ((cp->c_attr.ca_recflags & kHFSHasSecurityMask) == 0) {
- vap->va_acl = KAUTH_FILESEC_NONE;
+ vap->va_acl = (kauth_acl_t) KAUTH_FILESEC_NONE;
VATTR_SET_SUPPORTED(vap, va_acl);
}
}
+
+ vap->va_access_time.tv_sec = cp->c_atime;
+ vap->va_access_time.tv_nsec = 0;
vap->va_create_time.tv_sec = cp->c_itime;
vap->va_create_time.tv_nsec = 0;
- VATTR_SET_SUPPORTED(vap, va_create_time);
-
- if (VATTR_IS_ACTIVE(vap, va_access_time)) {
- /* Access times are lazyily updated, get current time if needed */
- if (cp->c_touch_acctime) {
- struct timeval tv;
-
- microtime(&tv);
- vap->va_access_time.tv_sec = tv.tv_sec;
- } else {
- vap->va_access_time.tv_sec = cp->c_atime;
- }
- vap->va_access_time.tv_nsec = 0;
- VATTR_SET_SUPPORTED(vap, va_access_time);
- }
vap->va_modify_time.tv_sec = cp->c_mtime;
vap->va_modify_time.tv_nsec = 0;
- VATTR_SET_SUPPORTED(vap, va_modify_time);
vap->va_change_time.tv_sec = cp->c_ctime;
vap->va_change_time.tv_nsec = 0;
- VATTR_SET_SUPPORTED(vap, va_change_time);
vap->va_backup_time.tv_sec = cp->c_btime;
- vap->va_backup_time.tv_nsec = 0;
- VATTR_SET_SUPPORTED(vap, va_backup_time);
+ vap->va_backup_time.tv_nsec = 0;
+
+ /* See if we need to emit the date added field to the user */
+ if (VATTR_IS_ACTIVE(vap, va_addedtime)) {
+ u_int32_t dateadded = hfs_get_dateadded (cp);
+ if (dateadded) {
+ vap->va_addedtime.tv_sec = dateadded;
+ vap->va_addedtime.tv_nsec = 0;
+ VATTR_SET_SUPPORTED (vap, va_addedtime);
+ }
+ }
+
+ /* XXX is this really a good 'optimal I/O size'? */
+ vap->va_iosize = hfsmp->hfs_logBlockSize;
+ vap->va_uid = cp->c_uid;
+ vap->va_gid = cp->c_gid;
+ vap->va_mode = cp->c_mode;
+ vap->va_flags = cp->c_bsdflags;
/*
* Exporting file IDs from HFS Plus:
* The stat call (getattr) uses va_fileid and the Carbon APIs,
* which are hardlink-ignorant, will ask for va_linkid.
*/
- VATTR_RETURN(vap, va_fileid, (uint64_t)cp->c_fileid);
- VATTR_RETURN(vap, va_linkid, (uint64_t)cp->c_cnid);
- VATTR_RETURN(vap, va_parentid, (uint64_t)cp->c_parentcnid);
- VATTR_RETURN(vap, va_fsid, cp->c_dev);
- VATTR_RETURN(vap, va_filerev, 0);
+ vap->va_fileid = (u_int64_t)cp->c_fileid;
+ /*
+ * We need to use the origin cache for both hardlinked files
+ * and directories. Hardlinked directories have multiple cnids
+ * and parents (one per link). Hardlinked files also have their
+ * own parents and link IDs separate from the indirect inode number.
+ * If we don't use the cache, we could end up vending the wrong ID
+ * because the cnode will only reflect the link that was looked up most recently.
+ */
+ if (cp->c_flag & C_HARDLINK) {
+ vap->va_linkid = (u_int64_t)hfs_currentcnid(cp);
+ vap->va_parentid = (u_int64_t)hfs_currentparent(cp, /* have_lock: */ true);
+ } else {
+ vap->va_linkid = (u_int64_t)cp->c_cnid;
+ vap->va_parentid = (u_int64_t)cp->c_parentcnid;
+ }
+ vap->va_fsid = hfsmp->hfs_raw_dev;
+ vap->va_filerev = 0;
+ vap->va_encoding = cp->c_encoding;
+ vap->va_rdev = (v_type == VBLK || v_type == VCHR) ? cp->c_rdev : 0;
+#if HFS_COMPRESSION
+ if (VATTR_IS_ACTIVE(vap, va_data_size)) {
+ if (hide_size)
+ vap->va_data_size = 0;
+ else if (compressed) {
+ if (uncompressed_size == -1) {
+ /* failed to get the uncompressed size above, so just return data_size */
+ vap->va_data_size = data_size;
+ } else {
+ /* use the uncompressed size we fetched above */
+ vap->va_data_size = uncompressed_size;
+ }
+ } else
+ vap->va_data_size = data_size;
+ VATTR_SET_SUPPORTED(vap, va_data_size);
+ }
+#else
+ vap->va_data_size = data_size;
+ vap->va_supported |= VNODE_ATTR_va_data_size;
+#endif
+
+#if CONFIG_PROTECT
+ if (VATTR_IS_ACTIVE(vap, va_dataprotect_class)) {
+ vap->va_dataprotect_class = cp->c_cpentry ? CP_CLASS(cp->c_cpentry->cp_pclass) : 0;
+ VATTR_SET_SUPPORTED(vap, va_dataprotect_class);
+ }
+#endif
+ if (VATTR_IS_ACTIVE(vap, va_write_gencount)) {
+ if (ubc_is_mapped_writable(vp)) {
+ /*
+ * Return 0 to the caller to indicate the file may be
+ * changing. There is no need for us to increment the
+ * generation counter here because it gets done as part of
+ * page-out and also when the file is unmapped (to account
+ * for changes we might not have seen).
+ */
+ vap->va_write_gencount = 0;
+ } else {
+ vap->va_write_gencount = hfs_get_gencount(cp);
+ }
- VATTR_RETURN(vap, va_encoding, cp->c_encoding);
+ VATTR_SET_SUPPORTED(vap, va_write_gencount);
+ }
- /* if this is the root, let VFS to find out the mount name, which may be different from the real name */
- if (VATTR_IS_ACTIVE(vap, va_name) && !vnode_isvroot(vp)) {
- /* Return the name for ATTR_CMN_NAME */
- if (cp->c_desc.cd_namelen == 0) {
- error = ENOENT;
- goto out;
+ /* Mark them all at once instead of individual VATTR_SET_SUPPORTED calls. */
+ vap->va_supported |= VNODE_ATTR_va_access_time |
+ VNODE_ATTR_va_create_time | VNODE_ATTR_va_modify_time |
+ VNODE_ATTR_va_change_time| VNODE_ATTR_va_backup_time |
+ VNODE_ATTR_va_iosize | VNODE_ATTR_va_uid |
+ VNODE_ATTR_va_gid | VNODE_ATTR_va_mode |
+ VNODE_ATTR_va_flags |VNODE_ATTR_va_fileid |
+ VNODE_ATTR_va_linkid | VNODE_ATTR_va_parentid |
+ VNODE_ATTR_va_fsid | VNODE_ATTR_va_filerev |
+ VNODE_ATTR_va_encoding | VNODE_ATTR_va_rdev;
+
+ /* If this is the root, let VFS to find out the mount name, which
+ * may be different from the real name. Otherwise, we need to take care
+ * for hardlinked files, which need to be looked up, if necessary
+ */
+ if (VATTR_IS_ACTIVE(vap, va_name) && (cp->c_cnid != kHFSRootFolderID)) {
+ struct cat_desc linkdesc;
+ int lockflags;
+ int uselinkdesc = 0;
+ cnid_t nextlinkid = 0;
+ cnid_t prevlinkid = 0;
+
+ /* Get the name for ATTR_CMN_NAME. We need to take special care for hardlinks
+ * here because the info. for the link ID requested by getattrlist may be
+ * different than what's currently in the cnode. This is because the cnode
+ * will be filled in with the information for the most recent link ID that went
+ * through namei/lookup(). If there are competing lookups for hardlinks that point
+ * to the same inode, one (or more) getattrlists could be vended incorrect name information.
+ * Also, we need to beware of open-unlinked files which could have a namelen of 0.
+ */
+
+ if ((cp->c_flag & C_HARDLINK) &&
+ ((cp->c_desc.cd_namelen == 0) || (vap->va_linkid != cp->c_cnid))) {
+ /*
+ * If we have no name and our link ID is the raw inode number, then we may
+ * have an open-unlinked file. Go to the next link in this case.
+ */
+ if ((cp->c_desc.cd_namelen == 0) && (vap->va_linkid == cp->c_fileid)) {
+ if ((error = hfs_lookup_siblinglinks(hfsmp, vap->va_linkid, &prevlinkid, &nextlinkid))){
+ goto out;
+ }
+ }
+ else {
+ /* just use link obtained from vap above */
+ nextlinkid = vap->va_linkid;
+ }
+
+ /* We need to probe the catalog for the descriptor corresponding to the link ID
+ * stored in nextlinkid. Note that we don't know if we have the exclusive lock
+ * for the cnode here, so we can't just update the descriptor. Instead,
+ * we should just store the descriptor's value locally and then use it to pass
+ * out the name value as needed below.
+ */
+ if (nextlinkid){
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
+ error = cat_findname(hfsmp, nextlinkid, &linkdesc);
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ if (error == 0) {
+ uselinkdesc = 1;
+ }
+ }
+ }
+
+ /* By this point, we've either patched up the name above and the c_desc
+ * points to the correct data, or it already did, in which case we just proceed
+ * by copying the name into the vap. Note that we will never set va_name to
+ * supported if nextlinkid is never initialized. This could happen in the degenerate
+ * case above involving the raw inode number, where it has no nextlinkid. In this case
+ * we will simply not mark the name bit as supported.
+ */
+ if (uselinkdesc) {
+ strlcpy(vap->va_name, (const char*) linkdesc.cd_nameptr, MAXPATHLEN);
+ VATTR_SET_SUPPORTED(vap, va_name);
+ cat_releasedesc(&linkdesc);
+ }
+ else if (cp->c_desc.cd_namelen) {
+ strlcpy(vap->va_name, (const char*) cp->c_desc.cd_nameptr, MAXPATHLEN);
+ VATTR_SET_SUPPORTED(vap, va_name);
}
-
- strncpy(vap->va_name, cp->c_desc.cd_nameptr, MAXPATHLEN);
- vap->va_name[MAXPATHLEN-1] = '\0';
- VATTR_SET_SUPPORTED(vap, va_name);
}
out:
hfs_unlock(cp);
+ /*
+ * We need to vnode_put the rsrc fork vnode only *after* we've released
+ * the cnode lock, since vnode_put can trigger an inactive call, which
+ * will go back into HFS and try to acquire a cnode lock.
+ */
if (rvp) {
- vnode_put(rvp);
+ vnode_put (rvp);
}
+
return (error);
}
-static int
+int
hfs_vnop_setattr(ap)
struct vnop_setattr_args /* {
struct vnode *a_vp;
int error = 0;
uid_t nuid;
gid_t ngid;
+ time_t orig_ctime;
+
+ orig_ctime = VTOC(vp)->c_ctime;
+
+#if HFS_COMPRESSION
+ int decmpfs_reset_state = 0;
+ /*
+ we call decmpfs_update_attributes even if the file is not compressed
+ because we want to update the incoming flags if the xattrs are invalid
+ */
+ error = decmpfs_update_attributes(vp, vap);
+ if (error)
+ return error;
+#endif
+ //
+ // if this is not a size-changing setattr and it is not just
+ // an atime update, then check for a snapshot.
+ //
+ if (!VATTR_IS_ACTIVE(vap, va_data_size) && !(vap->va_active == VNODE_ATTR_va_access_time)) {
+ check_for_tracked_file(vp, orig_ctime, NAMESPACE_HANDLER_METADATA_MOD, NSPACE_REARM_NO_ARG);
+ }
+
+#if CONFIG_PROTECT
+ /*
+ * All metadata changes should be allowed except a size-changing setattr, which
+ * has effects on file content and requires calling into cp_handle_vnop
+ * to have content protection check.
+ */
+ if (VATTR_IS_ACTIVE(vap, va_data_size)) {
+ if ((error = cp_handle_vnop(vp, CP_WRITE_ACCESS, 0)) != 0) {
+ return (error);
+ }
+ }
+#endif /* CONFIG_PROTECT */
hfsmp = VTOHFS(vp);
- /* Don't allow modification of the journal file. */
- if (hfsmp->hfs_jnlfileid == VTOC(vp)->c_fileid) {
+ /* Don't allow modification of the journal. */
+ if (hfs_is_journal_file(hfsmp, VTOC(vp))) {
return (EPERM);
}
+ //
+ // Check if we'll need a document_id and if so, get it before we lock the
+ // the cnode to avoid any possible deadlock with the root vnode which has
+ // to get locked to get the document id
+ //
+ u_int32_t document_id=0;
+ if (VATTR_IS_ACTIVE(vap, va_flags) && (vap->va_flags & UF_TRACKED) && !(VTOC(vp)->c_bsdflags & UF_TRACKED)) {
+ struct FndrExtendedDirInfo *fip = (struct FndrExtendedDirInfo *)((char *)&(VTOC(vp)->c_attr.ca_finderinfo) + 16);
+ //
+ // If the document_id is not set, get a new one. It will be set
+ // on the file down below once we hold the cnode lock.
+ //
+ if (fip->document_id == 0) {
+ if (hfs_generate_document_id(hfsmp, &document_id) != 0) {
+ document_id = 0;
+ }
+ }
+ }
+
+
/*
* File size change request.
* We are guaranteed that this is not a directory, and that
* the filesystem object is writeable.
+ *
+ * NOTE: HFS COMPRESSION depends on the data_size being set *before* the bsd flags are updated
*/
VATTR_SET_SUPPORTED(vap, va_data_size);
if (VATTR_IS_ACTIVE(vap, va_data_size) && !vnode_islnk(vp)) {
-
- /* Take truncate lock before taking cnode lock. */
- hfs_lock_truncate(VTOC(vp), TRUE);
- if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK))) {
- hfs_unlock_truncate(VTOC(vp));
- return (error);
+#if HFS_COMPRESSION
+ /* keep the compressed state locked until we're done truncating the file */
+ decmpfs_cnode *dp = VTOCMP(vp);
+ if (!dp) {
+ /*
+ * call hfs_lazy_init_decmpfs_cnode() to make sure that the decmpfs_cnode
+ * is filled in; we need a decmpfs_cnode to lock out decmpfs state changes
+ * on this file while it's truncating
+ */
+ dp = hfs_lazy_init_decmpfs_cnode(VTOC(vp));
+ if (!dp) {
+ /* failed to allocate a decmpfs_cnode */
+ return ENOMEM; /* what should this be? */
+ }
}
- cp = VTOC(vp);
+
+ check_for_tracked_file(vp, orig_ctime, vap->va_data_size == 0 ? NAMESPACE_HANDLER_TRUNCATE_OP|NAMESPACE_HANDLER_DELETE_OP : NAMESPACE_HANDLER_TRUNCATE_OP, NULL);
+
+ decmpfs_lock_compressed_data(dp, 1);
+ if (hfs_file_is_compressed(VTOC(vp), 1)) {
+ error = decmpfs_decompress_file(vp, dp, -1/*vap->va_data_size*/, 0, 1);
+ if (error != 0) {
+ decmpfs_unlock_compressed_data(dp, 1);
+ return error;
+ }
+ }
+#endif
+
+ // Take truncate lock
+ hfs_lock_truncate(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
- error = hfs_truncate(vp, vap->va_data_size, vap->va_vaflags & 0xffff, 0, ap->a_context);
+ // hfs_truncate will deal with the cnode lock
+ error = hfs_truncate(vp, vap->va_data_size, vap->va_vaflags & 0xffff,
+ 0, ap->a_context);
- hfs_unlock_truncate(cp);
+ hfs_unlock_truncate(VTOC(vp), HFS_LOCK_DEFAULT);
+#if HFS_COMPRESSION
+ decmpfs_unlock_compressed_data(dp, 1);
+#endif
if (error)
- goto out;
+ return error;
}
if (cp == NULL) {
- if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK)))
+ if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT)))
return (error);
cp = VTOC(vp);
}
+ /*
+ * If it is just an access time update request by itself
+ * we know the request is from kernel level code, and we
+ * can delay it without being as worried about consistency.
+ * This change speeds up mmaps, in the rare case that they
+ * get caught behind a sync.
+ */
+
+ if (vap->va_active == VNODE_ATTR_va_access_time) {
+ cp->c_touch_acctime=TRUE;
+ goto out;
+ }
+
+
+
/*
* Owner/group change request.
* We are guaranteed that the new owner/group is valid and legal.
* Mode change request.
* We are guaranteed that the mode value is valid and that in
* conjunction with the owner and group, this change is legal.
- */
+ */
VATTR_SET_SUPPORTED(vap, va_mode);
if (VATTR_IS_ACTIVE(vap, va_mode) &&
((error = hfs_chmod(vp, (int)vap->va_mode, cred, p)) != 0))
*/
VATTR_SET_SUPPORTED(vap, va_flags);
if (VATTR_IS_ACTIVE(vap, va_flags)) {
- cp->c_flags = vap->va_flags;
- cp->c_touch_chgtime = TRUE;
- }
+ u_int16_t *fdFlags;
- /*
- * If the file's extended security data is being changed, we
- * need to note the change. Note that because we don't store
- * the data, we do not set the SUPPORTED bit; this will cause
- * the VFS to use a fallback strategy.
- */
- if (VATTR_IS_ACTIVE(vap, va_acl)) {
- /* Remember if any ACL data was set or cleared. */
- if (vap->va_acl == NULL) {
- /* being cleared */
- if (cp->c_attr.ca_recflags & kHFSHasSecurityMask) {
- cp->c_attr.ca_recflags &= ~kHFSHasSecurityMask;
- cp->c_touch_chgtime = TRUE;
+#if HFS_COMPRESSION
+ if ((cp->c_bsdflags ^ vap->va_flags) & UF_COMPRESSED) {
+ /*
+ * the UF_COMPRESSED was toggled, so reset our cached compressed state
+ * but we don't want to actually do the update until we've released the cnode lock down below
+ * NOTE: turning the flag off doesn't actually decompress the file, so that we can
+ * turn off the flag and look at the "raw" file for debugging purposes
+ */
+ decmpfs_reset_state = 1;
+ }
+#endif
+ if ((vap->va_flags & UF_TRACKED) && !(cp->c_bsdflags & UF_TRACKED)) {
+ struct FndrExtendedDirInfo *fip = (struct FndrExtendedDirInfo *)((char *)&cp->c_attr.ca_finderinfo + 16);
+
+ //
+ // we're marking this item UF_TRACKED. if the document_id is
+ // not set, get a new one and put it on the file.
+ //
+ if (fip->document_id == 0) {
+ if (document_id != 0) {
+ // printf("SETATTR: assigning doc-id %d to %s (ino %d)\n", document_id, vp->v_name, cp->c_desc.cd_cnid);
+ fip->document_id = (uint32_t)document_id;
+#if CONFIG_FSE
+ add_fsevent(FSE_DOCID_CHANGED, ap->a_context,
+ FSE_ARG_DEV, hfsmp->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)0, // src inode #
+ FSE_ARG_INO, (ino64_t)cp->c_fileid, // dst inode #
+ FSE_ARG_INT32, document_id,
+ FSE_ARG_DONE);
+#endif
+ } else {
+ // printf("hfs: could not acquire a new document_id for %s (ino %d)\n", vp->v_name, cp->c_desc.cd_cnid);
+ }
}
- } else {
- /* being set */
- if ((cp->c_attr.ca_recflags & kHFSHasSecurityMask) == 0) {
- cp->c_attr.ca_recflags |= kHFSHasSecurityMask;
- cp->c_touch_chgtime = TRUE;
+
+ } else if (!(vap->va_flags & UF_TRACKED) && (cp->c_bsdflags & UF_TRACKED)) {
+ //
+ // UF_TRACKED is being cleared so clear the document_id
+ //
+ struct FndrExtendedDirInfo *fip = (struct FndrExtendedDirInfo *)((char *)&cp->c_attr.ca_finderinfo + 16);
+ if (fip->document_id) {
+ // printf("SETATTR: clearing doc-id %d from %s (ino %d)\n", fip->document_id, vp->v_name, cp->c_desc.cd_cnid);
+#if CONFIG_FSE
+ add_fsevent(FSE_DOCID_CHANGED, ap->a_context,
+ FSE_ARG_DEV, hfsmp->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)cp->c_fileid, // src inode #
+ FSE_ARG_INO, (ino64_t)0, // dst inode #
+ FSE_ARG_INT32, fip->document_id, // document id
+ FSE_ARG_DONE);
+#endif
+ fip->document_id = 0;
+ cp->c_bsdflags &= ~UF_TRACKED;
}
}
+
+ cp->c_bsdflags = vap->va_flags;
+ cp->c_flag |= C_MODIFIED;
+ cp->c_touch_chgtime = TRUE;
+
+
+ /*
+ * Mirror the UF_HIDDEN flag to the invisible bit of the Finder Info.
+ *
+ * The fdFlags for files and frFlags for folders are both 8 bytes
+ * into the userInfo (the first 16 bytes of the Finder Info). They
+ * are both 16-bit fields.
+ */
+ fdFlags = (u_int16_t *) &cp->c_finderinfo[8];
+ if (vap->va_flags & UF_HIDDEN)
+ *fdFlags |= OSSwapHostToBigConstInt16(kFinderInvisibleMask);
+ else
+ *fdFlags &= ~OSSwapHostToBigConstInt16(kFinderInvisibleMask);
}
/*
VATTR_IS_ACTIVE(vap, va_access_time) ||
VATTR_IS_ACTIVE(vap, va_modify_time) ||
VATTR_IS_ACTIVE(vap, va_backup_time)) {
- if (vnode_islnk(vp))
- goto done;
if (VATTR_IS_ACTIVE(vap, va_create_time))
cp->c_itime = vap->va_create_time.tv_sec;
if (VATTR_IS_ACTIVE(vap, va_access_time)) {
cp->c_touch_modtime = FALSE;
cp->c_touch_chgtime = TRUE;
+ hfs_clear_might_be_dirty_flag(cp);
+
/*
* The utimes system call can reset the modification
* time but it doesn't know about HFS create times.
*/
if ((VTOVCB(vp)->vcbSigWord == kHFSPlusSigWord) &&
(cp->c_cnid != kHFSRootFolderID) &&
+ !VATTR_IS_ACTIVE(vap, va_create_time) &&
(cp->c_mtime < cp->c_itime)) {
cp->c_itime = cp->c_mtime;
}
}
if (VATTR_IS_ACTIVE(vap, va_backup_time))
cp->c_btime = vap->va_backup_time.tv_sec;
- cp->c_flag |= C_MODIFIED;
+ cp->c_flag |= C_MINOR_MOD;
}
/*
VATTR_SET_SUPPORTED(vap, va_encoding);
if (VATTR_IS_ACTIVE(vap, va_encoding)) {
cp->c_encoding = vap->va_encoding;
+ cp->c_flag |= C_MODIFIED;
hfs_setencodingbits(hfsmp, cp->c_encoding);
}
-done:
- if ((error = hfs_update(vp, TRUE)) != 0)
- goto out;
- HFS_KNOTE(vp, NOTE_ATTRIB);
+ if ((error = hfs_update(vp, 0)) != 0)
+ goto out;
out:
- if (cp)
+ if (cp) {
+ /* Purge origin cache for cnode, since caller now has correct link ID for it
+ * We purge it here since it was acquired for us during lookup, and we no longer need it.
+ */
+ if ((cp->c_flag & C_HARDLINK) && (vp->v_type != VDIR)){
+ hfs_relorigin(cp, 0);
+ }
+
hfs_unlock(cp);
+#if HFS_COMPRESSION
+ if (decmpfs_reset_state) {
+ /*
+ * we've changed the UF_COMPRESSED flag, so reset the decmpfs state for this cnode
+ * but don't do it while holding the hfs cnode lock
+ */
+ decmpfs_cnode *dp = VTOCMP(vp);
+ if (!dp) {
+ /*
+ * call hfs_lazy_init_decmpfs_cnode() to make sure that the decmpfs_cnode
+ * is filled in; we need a decmpfs_cnode to prevent decmpfs state changes
+ * on this file if it's locked
+ */
+ dp = hfs_lazy_init_decmpfs_cnode(VTOC(vp));
+ if (!dp) {
+ /* failed to allocate a decmpfs_cnode */
+ return ENOMEM; /* what should this be? */
+ }
+ }
+ decmpfs_cnode_set_vnode_state(dp, FILE_TYPE_UNKNOWN, 0);
+ }
+#endif
+ }
return (error);
}
* Change the mode on a file.
* cnode must be locked before calling.
*/
-__private_extern__
int
-hfs_chmod(struct vnode *vp, int mode, kauth_cred_t cred, struct proc *p)
+hfs_chmod(struct vnode *vp, int mode, __unused kauth_cred_t cred, __unused struct proc *p)
{
register struct cnode *cp = VTOC(vp);
- int error;
if (VTOVCB(vp)->vcbSigWord != kHFSPlusSigWord)
return (0);
- // XXXdbg - don't allow modification of the journal or journal_info_block
- if (VTOHFS(vp)->jnl && cp && cp->c_datafork) {
- struct HFSPlusExtentDescriptor *extd;
-
- extd = &cp->c_datafork->ff_extents[0];
- if (extd->startBlock == VTOVCB(vp)->vcbJinfoBlock || extd->startBlock == VTOHFS(vp)->jnl_start) {
- return EPERM;
- }
+ // Don't allow modification of the journal or journal_info_block
+ if (hfs_is_journal_file(VTOHFS(vp), cp)) {
+ return EPERM;
}
#if OVERRIDE_UNKNOWN_PERMISSIONS
return (0);
};
#endif
- cp->c_mode &= ~ALLPERMS;
- cp->c_mode |= (mode & ALLPERMS);
+
+ mode_t new_mode = (cp->c_mode & ~ALLPERMS) | (mode & ALLPERMS);
+ if (new_mode != cp->c_mode) {
+ cp->c_mode = new_mode;
+ cp->c_flag |= C_MINOR_MOD;
+ }
cp->c_touch_chgtime = TRUE;
return (0);
}
-__private_extern__
int
hfs_write_access(struct vnode *vp, kauth_cred_t cred, struct proc *p, Boolean considerFlags)
{
}
/* If immutable bit set, nobody gets to write it. */
- if (considerFlags && (cp->c_flags & IMMUTABLE))
+ if (considerFlags && (cp->c_bsdflags & IMMUTABLE))
return (EPERM);
/* Otherwise, user id 0 always gets access. */
* Perform chown operation on cnode cp;
* code must be locked prior to call.
*/
-__private_extern__
int
+#if !QUOTA
+hfs_chown(struct vnode *vp, uid_t uid, gid_t gid, __unused kauth_cred_t cred,
+ __unused struct proc *p)
+#else
hfs_chown(struct vnode *vp, uid_t uid, gid_t gid, kauth_cred_t cred,
- struct proc *p)
+ __unused struct proc *p)
+#endif
{
register struct cnode *cp = VTOC(vp);
uid_t ouid;
gid_t ogid;
- int error = 0;
- int is_member;
#if QUOTA
+ int error = 0;
register int i;
int64_t change;
#endif /* QUOTA */
ogid = cp->c_gid;
ouid = cp->c_uid;
+
+ if (ouid == uid && ogid == gid) {
+ // No change, just set change time
+ cp->c_touch_chgtime = TRUE;
+ return 0;
+ }
+
#if QUOTA
if ((error = hfs_getinoquota(cp)))
return (error);
panic("hfs_chown: lost quota");
#endif /* QUOTA */
- if (ouid != uid || ogid != gid)
+ /*
+ * Without quotas, we could probably make this a minor
+ * modification.
+ */
+ cp->c_flag |= C_MODIFIED;
+
+ /*
+ According to the SUSv3 Standard, chown() shall mark
+ for update the st_ctime field of the file.
+ (No exceptions mentioned)
+ */
cp->c_touch_chgtime = TRUE;
return (0);
}
-
+#if HFS_COMPRESSION
/*
- * The hfs_exchange routine swaps the fork data in two files by
- * exchanging some of the information in the cnode. It is used
- * to preserve the file ID when updating an existing file, in
- * case the file is being tracked through its file ID. Typically
- * its used after creating a new file during a safe-save.
+ * Flush the resource fork if it exists. vp is the data fork and has
+ * an iocount.
*/
-static int
-hfs_vnop_exchange(ap)
- struct vnop_exchange_args /* {
- struct vnode *a_fvp;
- struct vnode *a_tvp;
- int a_options;
- vfs_context_t a_context;
- } */ *ap;
+static int hfs_flush_rsrc(vnode_t vp, vfs_context_t ctx)
{
- struct vnode *from_vp = ap->a_fvp;
- struct vnode *to_vp = ap->a_tvp;
+ cnode_t *cp = VTOC(vp);
+
+ hfs_lock(cp, HFS_SHARED_LOCK, 0);
+
+ vnode_t rvp = cp->c_rsrc_vp;
+
+ if (!rvp) {
+ hfs_unlock(cp);
+ return 0;
+ }
+
+ int vid = vnode_vid(rvp);
+
+ hfs_unlock(cp);
+
+ int error = vnode_getwithvid(rvp, vid);
+
+ if (error)
+ return error == ENOENT ? 0 : error;
+
+ hfs_lock_truncate(cp, HFS_EXCLUSIVE_LOCK, 0);
+ hfs_lock_always(cp, HFS_EXCLUSIVE_LOCK);
+ hfs_filedone(rvp, ctx, HFS_FILE_DONE_NO_SYNC);
+ hfs_unlock(cp);
+ hfs_unlock_truncate(cp, 0);
+
+ error = ubc_msync(rvp, 0, ubc_getsize(rvp), NULL,
+ UBC_PUSHALL | UBC_SYNC);
+
+ vnode_put(rvp);
+
+ return error;
+}
+#endif // HFS_COMPRESSION
+
+/*
+ * hfs_vnop_exchange:
+ *
+ * Inputs:
+ * 'from' vnode/cnode
+ * 'to' vnode/cnode
+ * options flag bits
+ * vfs_context
+ *
+ * Discussion:
+ * hfs_vnop_exchange is used to service the exchangedata(2) system call.
+ * Per the requirements of that system call, this function "swaps" some
+ * of the information that lives in one catalog record for some that
+ * lives in another. Note that not everything is swapped; in particular,
+ * the extent information stored in each cnode is kept local to that
+ * cnode. This allows existing file descriptor references to continue
+ * to operate on the same content, regardless of the location in the
+ * namespace that the file may have moved to. See inline comments
+ * in the function for more information.
+ */
+int
+hfs_vnop_exchange(ap)
+ struct vnop_exchange_args /* {
+ struct vnode *a_fvp;
+ struct vnode *a_tvp;
+ int a_options;
+ vfs_context_t a_context;
+ } */ *ap;
+{
+ struct vnode *from_vp = ap->a_fvp;
+ struct vnode *to_vp = ap->a_tvp;
struct cnode *from_cp;
struct cnode *to_cp;
struct hfsmount *hfsmp;
struct cat_desc tempdesc;
struct cat_attr tempattr;
+ const unsigned char *from_nameptr;
+ const unsigned char *to_nameptr;
+ char from_iname[32];
+ char to_iname[32];
+ uint32_t to_flag_special;
+ uint32_t from_flag_special;
+ cnid_t from_parid;
+ cnid_t to_parid;
int lockflags;
int error = 0, started_tr = 0, got_cookie = 0;
cat_cookie_t cookie;
+ time_t orig_from_ctime, orig_to_ctime;
+ bool have_cnode_locks = false, have_from_trunc_lock = false, have_to_trunc_lock = false;
- /* The files must be on the same volume. */
- if (vnode_mount(from_vp) != vnode_mount(to_vp))
- return (EXDEV);
-
- if (from_vp == to_vp)
- return (EINVAL);
-
- if ((error = hfs_lockpair(VTOC(from_vp), VTOC(to_vp), HFS_EXCLUSIVE_LOCK)))
- return (error);
+ /*
+ * VFS does the following checks:
+ * 1. Validate that both are files.
+ * 2. Validate that both are on the same mount.
+ * 3. Validate that they're not the same vnode.
+ */
from_cp = VTOC(from_vp);
to_cp = VTOC(to_vp);
hfsmp = VTOHFS(from_vp);
- /* Only normal files can be exchanged. */
- if (!vnode_isreg(from_vp) || !vnode_isreg(to_vp) ||
- (from_cp->c_flag & C_HARDLINK) || (to_cp->c_flag & C_HARDLINK) ||
- VNODE_IS_RSRC(from_vp) || VNODE_IS_RSRC(to_vp)) {
- error = EINVAL;
- goto exit;
+ orig_from_ctime = from_cp->c_ctime;
+ orig_to_ctime = to_cp->c_ctime;
+
+#if CONFIG_PROTECT
+ /*
+ * Do not allow exchangedata/F_MOVEDATAEXTENTS on data-protected filesystems
+ * because the EAs will not be swapped. As a result, the persistent keys would not
+ * match and the files will be garbage.
+ */
+ if (cp_fs_protected (vnode_mount(from_vp))) {
+ return EINVAL;
}
+#endif
- // XXXdbg - don't allow modification of the journal or journal_info_block
- if (hfsmp->jnl) {
- struct HFSPlusExtentDescriptor *extd;
+#if HFS_COMPRESSION
+ if (!ISSET(ap->a_options, FSOPT_EXCHANGE_DATA_ONLY)) {
+ if ( hfs_file_is_compressed(from_cp, 0) ) {
+ if ( 0 != ( error = decmpfs_decompress_file(from_vp, VTOCMP(from_vp), -1, 0, 1) ) ) {
+ return error;
+ }
+ }
- if (from_cp->c_datafork) {
- extd = &from_cp->c_datafork->ff_extents[0];
- if (extd->startBlock == VTOVCB(from_vp)->vcbJinfoBlock || extd->startBlock == hfsmp->jnl_start) {
- error = EPERM;
- goto exit;
+ if ( hfs_file_is_compressed(to_cp, 0) ) {
+ if ( 0 != ( error = decmpfs_decompress_file(to_vp, VTOCMP(to_vp), -1, 0, 1) ) ) {
+ return error;
}
}
+ }
+#endif // HFS_COMPRESSION
- if (to_cp->c_datafork) {
- extd = &to_cp->c_datafork->ff_extents[0];
- if (extd->startBlock == VTOVCB(to_vp)->vcbJinfoBlock || extd->startBlock == hfsmp->jnl_start) {
- error = EPERM;
+ // Resource forks cannot be exchanged.
+ if (VNODE_IS_RSRC(from_vp) || VNODE_IS_RSRC(to_vp))
+ return EINVAL;
+
+ /*
+ * Normally, we want to notify the user handlers about the event,
+ * except if it's a handler driving the event.
+ */
+ if ((ap->a_options & FSOPT_EXCHANGE_DATA_ONLY) == 0) {
+ check_for_tracked_file(from_vp, orig_from_ctime, NAMESPACE_HANDLER_WRITE_OP, NULL);
+ check_for_tracked_file(to_vp, orig_to_ctime, NAMESPACE_HANDLER_WRITE_OP, NULL);
+ } else {
+ /*
+ * This is currently used by mtmd so we should tidy up the
+ * file now because the data won't be used again in the
+ * destination file.
+ */
+ hfs_lock_truncate(from_cp, HFS_EXCLUSIVE_LOCK, 0);
+ hfs_lock_always(from_cp, HFS_EXCLUSIVE_LOCK);
+ hfs_filedone(from_vp, ap->a_context, HFS_FILE_DONE_NO_SYNC);
+ hfs_unlock(from_cp);
+ hfs_unlock_truncate(from_cp, 0);
+
+ // Flush all the data from the source file
+ error = ubc_msync(from_vp, 0, ubc_getsize(from_vp), NULL,
+ UBC_PUSHALL | UBC_SYNC);
+ if (error)
+ goto exit;
+
+#if HFS_COMPRESSION
+ /*
+ * If this is a compressed file, we need to do the same for
+ * the resource fork.
+ */
+ if (ISSET(from_cp->c_bsdflags, UF_COMPRESSED)) {
+ error = hfs_flush_rsrc(from_vp, ap->a_context);
+ if (error)
goto exit;
- }
}
+#endif
+
+ /*
+ * We're doing a data-swap so we need to take the truncate
+ * lock exclusively. We need an exclusive lock because we
+ * will be completely truncating the source file and we must
+ * make sure nobody else sneaks in and trys to issue I/O
+ * whilst we don't have the cnode lock.
+ *
+ * After taking the truncate lock we do a quick check to
+ * verify there are no other references (including mmap
+ * references), but we must remember that this does not stop
+ * anybody coming in later and taking a reference. We will
+ * have the truncate lock exclusively so that will prevent
+ * them from issuing any I/O.
+ */
+
+ if (to_cp < from_cp) {
+ hfs_lock_truncate(to_cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ have_to_trunc_lock = true;
+ }
+
+ hfs_lock_truncate(from_cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ have_from_trunc_lock = true;
+
+ /*
+ * Do an early check to verify the source is not in use by
+ * anyone. We should be called from an FD opened as F_EVTONLY
+ * so that doesn't count as a reference.
+ */
+ if (vnode_isinuse(from_vp, 0)) {
+ error = EBUSY;
+ goto exit;
+ }
+
+ if (to_cp >= from_cp) {
+ hfs_lock_truncate(to_cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ have_to_trunc_lock = true;
+ }
+ }
+
+ if ((error = hfs_lockpair(from_cp, to_cp, HFS_EXCLUSIVE_LOCK)))
+ goto exit;
+ have_cnode_locks = true;
+
+ // Don't allow modification of the journal or journal_info_block
+ if (hfs_is_journal_file(hfsmp, from_cp) ||
+ hfs_is_journal_file(hfsmp, to_cp)) {
+ error = EPERM;
+ goto exit;
+ }
+
+ /*
+ * Ok, now that all of the pre-flighting is done, call the underlying
+ * function if needed.
+ */
+ if (ISSET(ap->a_options, FSOPT_EXCHANGE_DATA_ONLY)) {
+#if HFS_COMPRESSION
+ if (ISSET(from_cp->c_bsdflags, UF_COMPRESSED)) {
+ error = hfs_move_compressed(from_cp, to_cp);
+ goto exit;
+ }
+#endif
+
+ error = hfs_move_data(from_cp, to_cp, 0);
+ goto exit;
}
if ((error = hfs_start_transaction(hfsmp)) != 0) {
/*
* Reserve some space in the Catalog file.
*/
- bzero(&cookie, sizeof(cookie));
if ((error = cat_preflight(hfsmp, CAT_EXCHANGE, &cookie, vfs_context_proc(ap->a_context)))) {
goto exit;
}
got_cookie = 1;
/* The backend code always tries to delete the virtual
- * extent id for exchanging files so we neeed to lock
+ * extent id for exchanging files so we need to lock
* the extents b-tree.
*/
lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_EXTENTS | SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
- /* Do the exchange */
- error = ExchangeFileIDs(hfsmp,
- from_cp->c_desc.cd_nameptr,
- to_cp->c_desc.cd_nameptr,
- from_cp->c_parentcnid,
- to_cp->c_parentcnid,
- from_cp->c_hint,
- to_cp->c_hint);
+ /* Account for the location of the catalog objects. */
+ if (from_cp->c_flag & C_HARDLINK) {
+ MAKE_INODE_NAME(from_iname, sizeof(from_iname),
+ from_cp->c_attr.ca_linkref);
+ from_nameptr = (unsigned char *)from_iname;
+ from_parid = hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid;
+ from_cp->c_hint = 0;
+ } else {
+ from_nameptr = from_cp->c_desc.cd_nameptr;
+ from_parid = from_cp->c_parentcnid;
+ }
+ if (to_cp->c_flag & C_HARDLINK) {
+ MAKE_INODE_NAME(to_iname, sizeof(to_iname),
+ to_cp->c_attr.ca_linkref);
+ to_nameptr = (unsigned char *)to_iname;
+ to_parid = hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid;
+ to_cp->c_hint = 0;
+ } else {
+ to_nameptr = to_cp->c_desc.cd_nameptr;
+ to_parid = to_cp->c_parentcnid;
+ }
+
+ /*
+ * ExchangeFileIDs swaps the on-disk, or in-BTree extent information
+ * attached to two different file IDs. It also swaps the extent
+ * information that may live in the extents-overflow B-Tree.
+ *
+ * We do this in a transaction as this may require a lot of B-Tree nodes
+ * to do completely, particularly if one of the files in question
+ * has a lot of extents.
+ *
+ * For example, assume "file1" has fileID 50, and "file2" has fileID 52.
+ * For the on-disk records, which are assumed to be synced, we will
+ * first swap the resident inline-8 extents as part of the catalog records.
+ * Then we will swap any extents overflow records for each file.
+ *
+ * When ExchangeFileIDs returns successfully, "file1" will have fileID 52,
+ * and "file2" will have fileID 50. However, note that this is only
+ * approximately half of the work that exchangedata(2) will need to
+ * accomplish. In other words, we swap "too much" of the information
+ * because if we only called ExchangeFileIDs, both the fileID and extent
+ * information would be the invariants of this operation. We don't
+ * actually want that; we want to conclude with "file1" having
+ * file ID 50, and "file2" having fileID 52.
+ *
+ * The remainder of hfs_vnop_exchange will swap the file ID and other cnode
+ * data back to the proper ownership, while still allowing the cnode to remain
+ * pointing at the same set of extents that it did originally.
+ */
+ error = ExchangeFileIDs(hfsmp, from_nameptr, to_nameptr, from_parid,
+ to_parid, from_cp->c_hint, to_cp->c_hint);
hfs_systemfile_unlock(hfsmp, lockflags);
/*
if (to_vp)
cache_purge(to_vp);
- /* Save a copy of from attributes before swapping. */
+ /* Bump both source and destination write counts before any swaps. */
+ {
+ hfs_incr_gencount (from_cp);
+ hfs_incr_gencount (to_cp);
+ }
+
+ /* Save a copy of "from" attributes before swapping. */
bcopy(&from_cp->c_desc, &tempdesc, sizeof(struct cat_desc));
bcopy(&from_cp->c_attr, &tempattr, sizeof(struct cat_attr));
+
+ /* Save whether or not each cnode is a hardlink or has EAs */
+ from_flag_special = from_cp->c_flag & (C_HARDLINK | C_HASXATTRS);
+ to_flag_special = to_cp->c_flag & (C_HARDLINK | C_HASXATTRS);
+
+ /* Drop the special bits from each cnode */
+ from_cp->c_flag &= ~(C_HARDLINK | C_HASXATTRS);
+ to_cp->c_flag &= ~(C_HARDLINK | C_HASXATTRS);
/*
- * Swap the descriptors and all non-fork related attributes.
- * (except the modify date)
+ * Now complete the in-memory portion of the copy.
+ *
+ * ExchangeFileIDs swaps the on-disk records involved. We complete the
+ * operation by swapping the in-memory contents of the two files here.
+ * We swap the cnode descriptors, which contain name, BSD attributes,
+ * timestamps, etc, about the file.
+ *
+ * NOTE: We do *NOT* swap the fileforks of the two cnodes. We have
+ * already swapped the on-disk extent information. As long as we swap the
+ * IDs, the in-line resident 8 extents that live in the filefork data
+ * structure will point to the right data for the new file ID if we leave
+ * them alone.
+ *
+ * As a result, any file descriptor that points to a particular
+ * vnode (even though it should change names), will continue
+ * to point to the same content.
*/
+
+ /* Copy the "to" -> "from" cnode */
bcopy(&to_cp->c_desc, &from_cp->c_desc, sizeof(struct cat_desc));
- from_cp->c_hint = 0;
- from_cp->c_fileid = from_cp->c_cnid;
- from_cp->c_itime = to_cp->c_itime;
- from_cp->c_btime = to_cp->c_btime;
- from_cp->c_atime = to_cp->c_atime;
- from_cp->c_ctime = to_cp->c_ctime;
- from_cp->c_gid = to_cp->c_gid;
- from_cp->c_uid = to_cp->c_uid;
- from_cp->c_flags = to_cp->c_flags;
- from_cp->c_mode = to_cp->c_mode;
- from_cp->c_attr.ca_recflags = to_cp->c_attr.ca_recflags;
- bcopy(to_cp->c_finderinfo, from_cp->c_finderinfo, 32);
+ from_cp->c_hint = 0;
+ /*
+ * If 'to' was a hardlink, then we copied over its link ID/CNID/(namespace ID)
+ * when we bcopy'd the descriptor above. However, the cnode attributes
+ * are not bcopied. As a result, make sure to swap the file IDs of each item.
+ *
+ * Further, other hardlink attributes must be moved along in this swap:
+ * the linkcount, the linkref, and the firstlink all need to move
+ * along with the file IDs. See note below regarding the flags and
+ * what moves vs. what does not.
+ *
+ * For Reference:
+ * linkcount == total # of hardlinks.
+ * linkref == the indirect inode pointer.
+ * firstlink == the first hardlink in the chain (written to the raw inode).
+ * These three are tied to the fileID and must move along with the rest of the data.
+ */
+ from_cp->c_fileid = to_cp->c_attr.ca_fileid;
+
+ from_cp->c_itime = to_cp->c_itime;
+ from_cp->c_btime = to_cp->c_btime;
+ from_cp->c_atime = to_cp->c_atime;
+ from_cp->c_ctime = to_cp->c_ctime;
+ from_cp->c_gid = to_cp->c_gid;
+ from_cp->c_uid = to_cp->c_uid;
+ from_cp->c_bsdflags = to_cp->c_bsdflags;
+ from_cp->c_mode = to_cp->c_mode;
+ from_cp->c_linkcount = to_cp->c_linkcount;
+ from_cp->c_attr.ca_linkref = to_cp->c_attr.ca_linkref;
+ from_cp->c_attr.ca_firstlink = to_cp->c_attr.ca_firstlink;
+
+ /*
+ * The cnode flags need to stay with the cnode and not get transferred
+ * over along with everything else because they describe the content; they are
+ * not attributes that reflect changes specific to the file ID. In general,
+ * fields that are tied to the file ID are the ones that will move.
+ *
+ * This reflects the fact that the file may have borrowed blocks, dirty metadata,
+ * or other extents, which may not yet have been written to the catalog. If
+ * they were, they would have been transferred above in the ExchangeFileIDs call above...
+ *
+ * The flags that are special are:
+ * C_HARDLINK, C_HASXATTRS
+ *
+ * These flags move with the item and file ID in the namespace since their
+ * state is tied to that of the file ID.
+ *
+ * So to transfer the flags, we have to take the following steps
+ * 1) Store in a localvar whether or not the special bits are set.
+ * 2) Drop the special bits from the current flags
+ * 3) swap the special flag bits to their destination
+ */
+ from_cp->c_flag |= to_flag_special | C_MODIFIED;
+ from_cp->c_attr.ca_recflags = to_cp->c_attr.ca_recflags;
+ bcopy(to_cp->c_finderinfo, from_cp->c_finderinfo, 32);
+
+
+ /* Copy the "from" -> "to" cnode */
+ bcopy(&tempdesc, &to_cp->c_desc, sizeof(struct cat_desc));
+ to_cp->c_hint = 0;
+ /*
+ * Pull the file ID from the tempattr we copied above. We can't assume
+ * it is the same as the CNID.
+ */
+ to_cp->c_fileid = tempattr.ca_fileid;
+ to_cp->c_itime = tempattr.ca_itime;
+ to_cp->c_btime = tempattr.ca_btime;
+ to_cp->c_atime = tempattr.ca_atime;
+ to_cp->c_ctime = tempattr.ca_ctime;
+ to_cp->c_gid = tempattr.ca_gid;
+ to_cp->c_uid = tempattr.ca_uid;
+ to_cp->c_bsdflags = tempattr.ca_flags;
+ to_cp->c_mode = tempattr.ca_mode;
+ to_cp->c_linkcount = tempattr.ca_linkcount;
+ to_cp->c_attr.ca_linkref = tempattr.ca_linkref;
+ to_cp->c_attr.ca_firstlink = tempattr.ca_firstlink;
+
+ /*
+ * Only OR in the "from" flags into our cnode flags below.
+ * Leave the rest of the flags alone.
+ */
+ to_cp->c_flag |= from_flag_special | C_MODIFIED;
+
+ to_cp->c_attr.ca_recflags = tempattr.ca_recflags;
+ bcopy(tempattr.ca_finderinfo, to_cp->c_finderinfo, 32);
+
+
+ /* Rehash the cnodes using their new file IDs */
+ hfs_chash_rehash(hfsmp, from_cp, to_cp);
+
+ /*
+ * When a file moves out of "Cleanup At Startup"
+ * we can drop its NODUMP status.
+ */
+ if ((from_cp->c_bsdflags & UF_NODUMP) &&
+ (from_cp->c_parentcnid != to_cp->c_parentcnid)) {
+ from_cp->c_bsdflags &= ~UF_NODUMP;
+ from_cp->c_touch_chgtime = TRUE;
+ }
+ if ((to_cp->c_bsdflags & UF_NODUMP) &&
+ (to_cp->c_parentcnid != from_cp->c_parentcnid)) {
+ to_cp->c_bsdflags &= ~UF_NODUMP;
+ to_cp->c_touch_chgtime = TRUE;
+ }
+
+exit:
+ if (got_cookie) {
+ cat_postflight(hfsmp, &cookie, vfs_context_proc(ap->a_context));
+ }
+ if (started_tr) {
+ hfs_end_transaction(hfsmp);
+ }
+
+ if (have_cnode_locks)
+ hfs_unlockpair(from_cp, to_cp);
+
+ if (have_from_trunc_lock)
+ hfs_unlock_truncate(from_cp, 0);
+
+ if (have_to_trunc_lock)
+ hfs_unlock_truncate(to_cp, 0);
+
+ return (error);
+}
+
+#if HFS_COMPRESSION
+/*
+ * This function is used specifically for the case when a namespace
+ * handler is trying to steal data before it's deleted. Note that we
+ * don't bother deleting the xattr from the source because it will get
+ * deleted a short time later anyway.
+ *
+ * cnodes must be locked
+ */
+static int hfs_move_compressed(cnode_t *from_cp, cnode_t *to_cp)
+{
+ int ret;
+ void *data = NULL;
+
+ CLR(from_cp->c_bsdflags, UF_COMPRESSED);
+ SET(from_cp->c_flag, C_MODIFIED);
+
+ ret = hfs_move_data(from_cp, to_cp, HFS_MOVE_DATA_INCLUDE_RSRC);
+ if (ret)
+ goto exit;
+
+ /*
+ * Transfer the xattr that decmpfs uses. Ideally, this code
+ * should be with the other decmpfs code but it's file system
+ * agnostic and this path is currently, and likely to remain, HFS+
+ * specific. It's easier and more performant if we implement it
+ * here.
+ */
+
+ size_t size = MAX_DECMPFS_XATTR_SIZE;
+ MALLOC(data, void *, size, M_TEMP, M_WAITOK);
+
+ ret = hfs_xattr_read(from_cp->c_vp, DECMPFS_XATTR_NAME, data, &size);
+ if (ret)
+ goto exit;
+
+ ret = hfs_xattr_write(to_cp->c_vp, DECMPFS_XATTR_NAME, data, size);
+ if (ret)
+ goto exit;
+
+ SET(to_cp->c_bsdflags, UF_COMPRESSED);
+ SET(to_cp->c_flag, C_MODIFIED);
+
+exit:
+ if (data)
+ FREE(data, M_TEMP);
+
+ return ret;
+}
+#endif // HFS_COMPRESSION
+
+int
+hfs_vnop_mmap(struct vnop_mmap_args *ap)
+{
+ struct vnode *vp = ap->a_vp;
+ cnode_t *cp = VTOC(vp);
+ int error;
+
+ if (VNODE_IS_RSRC(vp)) {
+ /* allow pageins of the resource fork */
+ } else {
+ int compressed = hfs_file_is_compressed(cp, 1); /* 1 == don't take the cnode lock */
+ time_t orig_ctime = cp->c_ctime;
+
+ if (!compressed && (cp->c_bsdflags & UF_COMPRESSED)) {
+ error = check_for_dataless_file(vp, NAMESPACE_HANDLER_READ_OP);
+ if (error != 0) {
+ return error;
+ }
+ }
+
+ if (ap->a_fflags & PROT_WRITE) {
+ check_for_tracked_file(vp, orig_ctime, NAMESPACE_HANDLER_WRITE_OP, NULL);
+ }
+ }
+
+ //
+ // NOTE: we return ENOTSUP because we want the cluster layer
+ // to actually do all the real work.
+ //
+ return (ENOTSUP);
+}
+
+static errno_t hfs_vnop_mnomap(struct vnop_mnomap_args *ap)
+{
+ vnode_t vp = ap->a_vp;
+
+ /*
+ * Whilst the file was mapped, there may not have been any
+ * page-outs so we need to increment the generation counter now.
+ * Unfortunately this may lead to a change in the generation
+ * counter when no actual change has been made, but there is
+ * little we can do about that with our current architecture.
+ */
+ if (ubc_is_mapped_writable(vp)) {
+ cnode_t *cp = VTOC(vp);
+ hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_ALLOW_NOEXISTS);
+ hfs_incr_gencount(cp);
+
+ /*
+ * We don't want to set the modification time here since a
+ * change to that is not acceptable if no changes were made.
+ * Instead we set a flag so that if we get any page-outs we
+ * know to update the modification time. It's possible that
+ * they weren't actually because of changes made whilst the
+ * file was mapped but that's not easy to fix now.
+ */
+ SET(cp->c_flag, C_MIGHT_BE_DIRTY_FROM_MAPPING);
+
+ hfs_unlock(cp);
+ }
+
+ return 0;
+}
+
+/*
+ * Mark the resource fork as needing a ubc_setsize when we drop the
+ * cnode lock later.
+ */
+static void hfs_rsrc_setsize(cnode_t *cp)
+{
+ /*
+ * We need to take an iocount if we don't have one. vnode_get
+ * will return ENOENT if the vnode is terminating which is what we
+ * want as it's not safe to call ubc_setsize in that case.
+ */
+ if (cp->c_rsrc_vp && !vnode_get(cp->c_rsrc_vp)) {
+ // Shouldn't happen, but better safe...
+ if (ISSET(cp->c_flag, C_NEED_RVNODE_PUT))
+ vnode_put(cp->c_rsrc_vp);
+ SET(cp->c_flag, C_NEED_RVNODE_PUT | C_NEED_RSRC_SETSIZE);
+ }
+}
+
+/*
+ * hfs_move_data
+ *
+ * This is a non-symmetric variant of exchangedata. In this function,
+ * the contents of the data fork (and optionally the resource fork)
+ * are moved from from_cp to to_cp.
+ *
+ * The cnodes must be locked.
+ *
+ * The cnode pointed to by 'to_cp' *must* be empty prior to invoking
+ * this function. We impose this restriction because we may not be
+ * able to fully delete the entire file's contents in a single
+ * transaction, particularly if it has a lot of extents. In the
+ * normal file deletion codepath, the file is screened for two
+ * conditions: 1) bigger than 400MB, and 2) more than 8 extents. If
+ * so, the file is relocated to the hidden directory and the deletion
+ * is broken up into multiple truncates. We can't do that here
+ * because both files need to exist in the namespace. The main reason
+ * this is imposed is that we may have to touch a whole lot of bitmap
+ * blocks if there are many extents.
+ *
+ * Any data written to 'from_cp' after this call completes is not
+ * guaranteed to be moved.
+ *
+ * Arguments:
+ * cnode_t *from_cp : source file
+ * cnode_t *to_cp : destination file; must be empty
+ *
+ * Returns:
+ *
+ * EBUSY - File has been deleted or is in use
+ * EFBIG - Destination file was not empty
+ * EIO - An I/O error
+ * 0 - success
+ * other - Other errors that can be returned from called functions
+ */
+int hfs_move_data(cnode_t *from_cp, cnode_t *to_cp,
+ hfs_move_data_options_t options)
+{
+ hfsmount_t *hfsmp = VTOHFS(from_cp->c_vp);
+ int error = 0;
+ int lockflags = 0;
+ bool return_EIO_on_error = false;
+ const bool include_rsrc = ISSET(options, HFS_MOVE_DATA_INCLUDE_RSRC);
+
+ /* Verify that neither source/dest file is open-unlinked */
+ if (ISSET(from_cp->c_flag, C_DELETED | C_NOEXISTS)
+ || ISSET(to_cp->c_flag, C_DELETED | C_NOEXISTS)) {
+ return EBUSY;
+ }
+
+ /*
+ * Verify the source file is not in use by anyone besides us.
+ *
+ * This function is typically invoked by a namespace handler
+ * process responding to a temporarily stalled system call.
+ * The FD that it is working off of is opened O_EVTONLY, so
+ * it really has no active usecounts (the kusecount from O_EVTONLY
+ * is subtracted from the total usecounts).
+ *
+ * As a result, we shouldn't have any active usecounts against
+ * this vnode when we go to check it below.
+ */
+ if (vnode_isinuse(from_cp->c_vp, 0))
+ return EBUSY;
+
+ if (include_rsrc && from_cp->c_rsrc_vp) {
+ if (vnode_isinuse(from_cp->c_rsrc_vp, 0))
+ return EBUSY;
+
+ /*
+ * In the code below, if the destination file doesn't have a
+ * c_rsrcfork then we don't create it which means we we cannot
+ * transfer the ff_invalidranges and cf_vblocks fields. These
+ * shouldn't be set because we flush the resource fork before
+ * calling this function but there is a tiny window when we
+ * did not have any locks...
+ */
+ if (!to_cp->c_rsrcfork
+ && (!TAILQ_EMPTY(&from_cp->c_rsrcfork->ff_invalidranges)
+ || from_cp->c_rsrcfork->ff_unallocblocks)) {
+ /*
+ * The file isn't really busy now but something did slip
+ * in and tinker with the file while we didn't have any
+ * locks, so this is the most meaningful return code for
+ * the caller.
+ */
+ return EBUSY;
+ }
+ }
+
+ // Check the destination file is empty
+ if (to_cp->c_datafork->ff_blocks
+ || to_cp->c_datafork->ff_size
+ || (include_rsrc
+ && (to_cp->c_blocks
+ || (to_cp->c_rsrcfork && to_cp->c_rsrcfork->ff_size)))) {
+ return EFBIG;
+ }
+
+ if ((error = hfs_start_transaction (hfsmp)))
+ return error;
+
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_EXTENTS | SFL_ATTRIBUTE,
+ HFS_EXCLUSIVE_LOCK);
+
+ // filefork_t is 128 bytes which should be OK
+ filefork_t rfork_buf, *from_rfork = NULL;
+
+ if (include_rsrc) {
+ from_rfork = from_cp->c_rsrcfork;
+
+ /*
+ * Creating resource fork vnodes is expensive, so just get get
+ * the fork data if we need it.
+ */
+ if (!from_rfork && hfs_has_rsrc(from_cp)) {
+ from_rfork = &rfork_buf;
+
+ from_rfork->ff_cp = from_cp;
+ TAILQ_INIT(&from_rfork->ff_invalidranges);
+
+ error = cat_idlookup(hfsmp, from_cp->c_fileid, 0, 1, NULL, NULL,
+ &from_rfork->ff_data);
+
+ if (error)
+ goto exit;
+ }
+ }
+
+ /*
+ * From here on, any failures mean that we might be leaving things
+ * in a weird or inconsistent state. Ideally, we should back out
+ * all the changes, but to do that properly we need to fix
+ * MoveData. We'll save fixing that for another time. For now,
+ * just return EIO in all cases to the caller so that they know.
+ */
+ return_EIO_on_error = true;
+
+ bool data_overflow_extents = overflow_extents(from_cp->c_datafork);
+
+ // Move the data fork
+ if ((error = hfs_move_fork (from_cp->c_datafork, from_cp,
+ to_cp->c_datafork, to_cp))) {
+ goto exit;
+ }
+
+ SET(from_cp->c_flag, C_NEED_DATA_SETSIZE);
+ SET(to_cp->c_flag, C_NEED_DATA_SETSIZE);
+
+ // We move the resource fork later
+
+ /*
+ * Note that because all we're doing is moving the extents around,
+ * we can probably do this in a single transaction: Each extent
+ * record (group of 8) is 64 bytes. A extent overflow B-Tree node
+ * is typically 4k. This means each node can hold roughly ~60
+ * extent records == (480 extents).
+ *
+ * If a file was massively fragmented and had 20k extents, this
+ * means we'd roughly touch 20k/480 == 41 to 42 nodes, plus the
+ * index nodes, for half of the operation. (inserting or
+ * deleting). So if we're manipulating 80-100 nodes, this is
+ * basically 320k of data to write to the journal in a bad case.
+ */
+ if (data_overflow_extents) {
+ if ((error = MoveData(hfsmp, from_cp->c_cnid, to_cp->c_cnid, 0)))
+ goto exit;
+ }
+
+ if (from_rfork && overflow_extents(from_rfork)) {
+ if ((error = MoveData(hfsmp, from_cp->c_cnid, to_cp->c_cnid, 1)))
+ goto exit;
+ }
+
+ // Touch times
+ from_cp->c_touch_acctime = TRUE;
+ from_cp->c_touch_chgtime = TRUE;
+ from_cp->c_touch_modtime = TRUE;
+ hfs_touchtimes(hfsmp, from_cp);
+
+ to_cp->c_touch_acctime = TRUE;
+ to_cp->c_touch_chgtime = TRUE;
+ to_cp->c_touch_modtime = TRUE;
+ hfs_touchtimes(hfsmp, to_cp);
+
+ struct cat_fork dfork_buf;
+ const struct cat_fork *dfork, *rfork;
+
+ dfork = hfs_prepare_fork_for_update(to_cp->c_datafork, NULL,
+ &dfork_buf, hfsmp->blockSize);
+ rfork = hfs_prepare_fork_for_update(from_rfork, NULL,
+ &rfork_buf.ff_data, hfsmp->blockSize);
+
+ // Update the catalog nodes, to_cp first
+ if ((error = cat_update(hfsmp, &to_cp->c_desc, &to_cp->c_attr,
+ dfork, rfork))) {
+ goto exit;
+ }
+
+ CLR(to_cp->c_flag, C_MODIFIED | C_MINOR_MOD);
+
+ // Update in-memory resource fork data here
+ if (from_rfork) {
+ // Update c_blocks
+ uint32_t moving = from_rfork->ff_blocks + from_rfork->ff_unallocblocks;
+
+ from_cp->c_blocks -= moving;
+ to_cp->c_blocks += moving;
- bcopy(&tempdesc, &to_cp->c_desc, sizeof(struct cat_desc));
- to_cp->c_hint = 0;
- to_cp->c_fileid = to_cp->c_cnid;
- to_cp->c_itime = tempattr.ca_itime;
- to_cp->c_btime = tempattr.ca_btime;
- to_cp->c_atime = tempattr.ca_atime;
- to_cp->c_ctime = tempattr.ca_ctime;
- to_cp->c_gid = tempattr.ca_gid;
- to_cp->c_uid = tempattr.ca_uid;
- to_cp->c_flags = tempattr.ca_flags;
- to_cp->c_mode = tempattr.ca_mode;
- to_cp->c_attr.ca_recflags = tempattr.ca_recflags;
- bcopy(tempattr.ca_finderinfo, to_cp->c_finderinfo, 32);
+ // Update to_cp's resource data if it has it
+ filefork_t *to_rfork = to_cp->c_rsrcfork;
+ if (to_rfork) {
+ to_rfork->ff_invalidranges = from_rfork->ff_invalidranges;
+ to_rfork->ff_data = from_rfork->ff_data;
- /* Rehash the cnodes using their new file IDs */
- hfs_chash_rehash(from_cp, to_cp);
+ // Deal with ubc_setsize
+ hfs_rsrc_setsize(to_cp);
+ }
- /*
- * When a file moves out of "Cleanup At Startup"
- * we can drop its NODUMP status.
- */
- if ((from_cp->c_flags & UF_NODUMP) &&
- (from_cp->c_parentcnid != to_cp->c_parentcnid)) {
- from_cp->c_flags &= ~UF_NODUMP;
- from_cp->c_touch_chgtime = TRUE;
+ // Wipe out the resource fork in from_cp
+ rl_init(&from_rfork->ff_invalidranges);
+ bzero(&from_rfork->ff_data, sizeof(from_rfork->ff_data));
+
+ // Deal with ubc_setsize
+ hfs_rsrc_setsize(from_cp);
}
- if ((to_cp->c_flags & UF_NODUMP) &&
- (to_cp->c_parentcnid != from_cp->c_parentcnid)) {
- to_cp->c_flags &= ~UF_NODUMP;
- to_cp->c_touch_chgtime = TRUE;
+
+ // Currently unnecessary, but might be useful in future...
+ dfork = hfs_prepare_fork_for_update(from_cp->c_datafork, NULL, &dfork_buf,
+ hfsmp->blockSize);
+ rfork = hfs_prepare_fork_for_update(from_rfork, NULL, &rfork_buf.ff_data,
+ hfsmp->blockSize);
+
+ // Update from_cp
+ if ((error = cat_update(hfsmp, &from_cp->c_desc, &from_cp->c_attr,
+ dfork, rfork))) {
+ goto exit;
}
- HFS_KNOTE(from_vp, NOTE_ATTRIB);
- HFS_KNOTE(to_vp, NOTE_ATTRIB);
+ CLR(from_cp->c_flag, C_MODIFIED | C_MINOR_MOD);
exit:
- if (got_cookie) {
- cat_postflight(hfsmp, &cookie, vfs_context_proc(ap->a_context));
+ if (lockflags) {
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ hfs_end_transaction(hfsmp);
}
- if (started_tr) {
- hfs_end_transaction(hfsmp);
+
+ if (error && error != EIO && return_EIO_on_error) {
+ printf("hfs_move_data: encountered error %d\n", error);
+ error = EIO;
}
- hfs_unlockpair(from_cp, to_cp);
- return (error);
+ return error;
+}
+
+/*
+ * Move all of the catalog and runtime data in srcfork to dstfork.
+ *
+ * This allows us to maintain the invalid ranges across the move data
+ * operation so we don't need to force all of the pending IO right
+ * now. In addition, we move all non overflow-extent extents into the
+ * destination here.
+ *
+ * The destination fork must be empty and should have been checked
+ * prior to calling this.
+ */
+static int hfs_move_fork(filefork_t *srcfork, cnode_t *src_cp,
+ filefork_t *dstfork, cnode_t *dst_cp)
+{
+ // Move the invalid ranges
+ TAILQ_SWAP(&dstfork->ff_invalidranges, &srcfork->ff_invalidranges,
+ rl_entry, rl_link);
+ rl_remove_all(&srcfork->ff_invalidranges);
+
+ // Move the fork data (copy whole structure)
+ dstfork->ff_data = srcfork->ff_data;
+ bzero(&srcfork->ff_data, sizeof(srcfork->ff_data));
+
+ // Update c_blocks
+ src_cp->c_blocks -= dstfork->ff_blocks + dstfork->ff_unallocblocks;
+ dst_cp->c_blocks += dstfork->ff_blocks + dstfork->ff_unallocblocks;
+
+ return 0;
+}
+
+
+#include <i386/panic_hooks.h>
+
+struct hfs_fsync_panic_hook {
+ panic_hook_t hook;
+ struct cnode *cp;
+};
+
+static void hfs_fsync_panic_hook(panic_hook_t *hook_)
+{
+ struct hfs_fsync_panic_hook *hook = (struct hfs_fsync_panic_hook *)hook_;
+ extern int kdb_log(const char *fmt, ...);
+
+ // Get the physical region just before cp
+ panic_phys_range_t range;
+ uint64_t phys;
+
+ if (panic_phys_range_before(hook->cp, &phys, &range)) {
+ kdb_log("cp = %p, phys = %p, prev (%p: %p-%p)\n",
+ hook->cp, phys, range.type, range.phys_start,
+ range.phys_start + range.len);
+ } else
+ kdb_log("cp = %p, phys = %p, prev (!)\n", hook->cp, phys);
+
+ panic_dump_mem((void *)(((vm_offset_t)hook->cp - 4096) & ~4095), 12288);
+
+ kdb_log("\n");
}
/*
* cnode must be locked
*/
-__private_extern__
int
-hfs_fsync(struct vnode *vp, int waitfor, int fullsync, struct proc *p)
+hfs_fsync(struct vnode *vp, int waitfor, hfs_fsync_mode_t fsyncmode, struct proc *p)
{
struct cnode *cp = VTOC(vp);
struct filefork *fp = NULL;
int retval = 0;
struct hfsmount *hfsmp = VTOHFS(vp);
struct timeval tv;
- int wait;
+ int waitdata; /* attributes necessary for data retrieval */
+ int wait; /* all other attributes (e.g. atime, etc.) */
int lockflag;
int took_trunc_lock = 0;
+ int locked_buffers = 0;
+ int fsync_default = 1;
+ /*
+ * Applications which only care about data integrity rather than full
+ * file integrity may opt out of (delay) expensive metadata update
+ * operations as a performance optimization.
+ */
wait = (waitfor == MNT_WAIT);
+ waitdata = (waitfor == MNT_DWAIT) | wait;
+ if (always_do_fullfsync)
+ fsyncmode = HFS_FSYNC_FULL;
+ if (fsyncmode != HFS_FSYNC)
+ fsync_default = 0;
+
/* HFS directories don't have any data blocks. */
if (vnode_isdir(vp))
goto metasync;
+ fp = VTOF(vp);
/*
* For system files flush the B-tree header and
}
} else if (UBCINFOEXISTS(vp)) {
hfs_unlock(cp);
- hfs_lock_truncate(cp, TRUE);
+ hfs_lock_truncate(cp, HFS_SHARED_LOCK, HFS_LOCK_DEFAULT);
took_trunc_lock = 1;
+ struct hfs_fsync_panic_hook hook;
+ hook.cp = cp;
+ panic_hook(&hook.hook, hfs_fsync_panic_hook);
+
+ if (fp->ff_unallocblocks != 0) {
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
+
+ hfs_lock_truncate(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ }
+
+ panic_unhook(&hook.hook);
+
/* Don't hold cnode lock when calling into cluster layer. */
- (void) cluster_push(vp, 0);
+ (void) cluster_push(vp, waitdata ? IO_SYNC : 0);
- hfs_lock(cp, HFS_FORCE_LOCK);
+ hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_ALLOW_NOEXISTS);
}
/*
* When MNT_WAIT is requested and the zero fill timeout
*
* Files with NODUMP can bypass zero filling here.
*/
- if ((wait || (cp->c_flag & C_ZFWANTSYNC)) &&
- ((cp->c_flags & UF_NODUMP) == 0) &&
- UBCINFOEXISTS(vp) && (fp = VTOF(vp)) &&
- cp->c_zftimeout != 0) {
+ if (fp && (((cp->c_flag & C_ALWAYS_ZEROFILL) && !TAILQ_EMPTY(&fp->ff_invalidranges)) ||
+ ((wait || (cp->c_flag & C_ZFWANTSYNC)) &&
+ ((cp->c_bsdflags & UF_NODUMP) == 0) &&
+ UBCINFOEXISTS(vp) && (vnode_issystem(vp) ==0) &&
+ cp->c_zftimeout != 0))) {
+
microuptime(&tv);
- if (tv.tv_sec < cp->c_zftimeout) {
+ if ((cp->c_flag & C_ALWAYS_ZEROFILL) == 0 && fsync_default && tv.tv_sec < (long)cp->c_zftimeout) {
/* Remember that a force sync was requested. */
cp->c_flag |= C_ZFWANTSYNC;
goto datasync;
}
- if (!took_trunc_lock) {
- hfs_unlock(cp);
- hfs_lock_truncate(cp, TRUE);
- hfs_lock(cp, HFS_FORCE_LOCK);
- took_trunc_lock = 1;
- }
-
- while (!CIRCLEQ_EMPTY(&fp->ff_invalidranges)) {
- struct rl_entry *invalid_range = CIRCLEQ_FIRST(&fp->ff_invalidranges);
- off_t start = invalid_range->rl_start;
- off_t end = invalid_range->rl_end;
-
- /* The range about to be written must be validated
- * first, so that VNOP_BLOCKMAP() will return the
- * appropriate mapping for the cluster code:
- */
- rl_remove(start, end, &fp->ff_invalidranges);
-
- /* Don't hold cnode lock when calling into cluster layer. */
+ if (!TAILQ_EMPTY(&fp->ff_invalidranges)) {
+ if (!took_trunc_lock || (cp->c_truncatelockowner == HFS_SHARED_OWNER)) {
+ hfs_unlock(cp);
+ if (took_trunc_lock) {
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
+ }
+ hfs_lock_truncate(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_ALLOW_NOEXISTS);
+ took_trunc_lock = 1;
+ }
+ hfs_flush_invalid_ranges(vp);
hfs_unlock(cp);
- (void) cluster_write(vp, (struct uio *) 0,
- fp->ff_size, end + 1, start, (off_t)0,
- IO_HEADZEROFILL | IO_NOZERODIRTY | IO_NOCACHE);
- hfs_lock(cp, HFS_FORCE_LOCK);
- cp->c_flag |= C_MODIFIED;
+ (void) cluster_push(vp, waitdata ? IO_SYNC : 0);
+ hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_ALLOW_NOEXISTS);
}
- hfs_unlock(cp);
- (void) cluster_push(vp, 0);
- hfs_lock(cp, HFS_FORCE_LOCK);
-
- cp->c_flag &= ~C_ZFWANTSYNC;
- cp->c_zftimeout = 0;
}
datasync:
- if (took_trunc_lock)
- hfs_unlock_truncate(cp);
-
+ if (took_trunc_lock) {
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
+ took_trunc_lock = 0;
+ }
/*
* if we have a journal and if journal_active() returns != 0 then the
* we shouldn't do anything to a locked block (because it is part
/*
* Flush all dirty buffers associated with a vnode.
+ * Record how many of them were dirty AND locked (if necessary).
*/
- buf_flushdirtyblks(vp, wait, lockflag, "hfs_fsync");
+ locked_buffers = buf_flushdirtyblks_skipinfo(vp, waitdata, lockflag, "hfs_fsync");
+ if ((lockflag & BUF_SKIP_LOCKED) && (locked_buffers) && (vnode_vtype(vp) == VLNK)) {
+ /*
+ * If there are dirty symlink buffers, then we may need to take action
+ * to prevent issues later on if we are journaled. If we're fsyncing a
+ * symlink vnode then we are in one of three cases:
+ *
+ * 1) automatic sync has fired. In this case, we don't want the behavior to change.
+ *
+ * 2) Someone has opened the FD for the symlink (not what it points to)
+ * and has issued an fsync against it. This should be rare, and we don't
+ * want the behavior to change.
+ *
+ * 3) We are being called by a vclean which is trying to reclaim this
+ * symlink vnode. If this is the case, then allowing this fsync to
+ * proceed WITHOUT flushing the journal could result in the vclean
+ * invalidating the buffer's blocks before the journal transaction is
+ * written to disk. To prevent this, we force a journal flush
+ * if the vnode is in the middle of a recycle (VL_TERMINATE or VL_DEAD is set).
+ */
+ if (vnode_isrecycled(vp)) {
+ fsync_default = 0;
+ }
+ }
metasync:
if (vnode_isreg(vp) && vnode_issystem(vp)) {
cp->c_touch_chgtime = FALSE;
cp->c_touch_modtime = FALSE;
} else if ( !(vp->v_flag & VSWAP) ) /* User file */ {
- retval = hfs_update(vp, wait);
+ retval = hfs_update(vp, HFS_UPDATE_FORCE);
- /* When MNT_WAIT is requested push out any delayed meta data */
- if ((retval == 0) && wait && cp->c_hint &&
+ /*
+ * When MNT_WAIT is requested push out the catalog record for
+ * this file. If they asked for a full fsync, we can skip this
+ * because the journal_flush or hfs_metasync_all will push out
+ * all of the metadata changes.
+ */
+ if ((retval == 0) && wait && fsync_default && cp->c_hint &&
!ISSET(cp->c_flag, C_DELETED | C_NOEXISTS)) {
hfs_metasync(VTOHFS(vp), (daddr64_t)cp->c_hint, p);
- }
+ }
- // make sure that we've really been called from the user
- // fsync() and if so push out any pending transactions
- // that this file might is a part of (and get them on
- // stable storage).
- if (fullsync || always_do_fullfsync) {
- if (hfsmp->jnl) {
- journal_flush(hfsmp->jnl);
- } else {
- /* XXX need to pass context! */
- VNOP_IOCTL(hfsmp->hfs_devvp, DKIOCSYNCHRONIZECACHE, NULL, FWRITE, NULL);
- }
+ /*
+ * If this was a full fsync, make sure all metadata
+ * changes get to stable storage.
+ */
+ if (!fsync_default) {
+ if (hfsmp->jnl) {
+ if (fsyncmode == HFS_FSYNC_FULL)
+ hfs_flush(hfsmp, HFS_FLUSH_FULL);
+ else
+ hfs_flush(hfsmp,
+ HFS_FLUSH_JOURNAL_BARRIER);
+ } else {
+ retval = hfs_metasync_all(hfsmp);
+ /* XXX need to pass context! */
+ hfs_flush(hfsmp, HFS_FLUSH_CACHE);
+ }
}
}
+ if (!hfs_is_dirty(cp) && !ISSET(cp->c_flag, C_DELETED))
+ vnode_cleardirty(vp);
+
return (retval);
}
/* Sync an hfs catalog b-tree node */
-static int
-hfs_metasync(struct hfsmount *hfsmp, daddr64_t node, struct proc *p)
+int
+hfs_metasync(struct hfsmount *hfsmp, daddr64_t node, __unused struct proc *p)
{
vnode_t vp;
buf_t bp;
}
+/*
+ * Sync all hfs B-trees. Use this instead of journal_flush for a volume
+ * without a journal. Note that the volume bitmap does not get written;
+ * we rely on fsck_hfs to fix that up (which it can do without any loss
+ * of data).
+ */
+int
+hfs_metasync_all(struct hfsmount *hfsmp)
+{
+ int lockflags;
+
+ /* Lock all of the B-trees so we get a mutually consistent state */
+ lockflags = hfs_systemfile_lock(hfsmp,
+ SFL_CATALOG|SFL_EXTENTS|SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
+
+ /* Sync each of the B-trees */
+ if (hfsmp->hfs_catalog_vp)
+ hfs_btsync(hfsmp->hfs_catalog_vp, 0);
+ if (hfsmp->hfs_extents_vp)
+ hfs_btsync(hfsmp->hfs_extents_vp, 0);
+ if (hfsmp->hfs_attribute_vp)
+ hfs_btsync(hfsmp->hfs_attribute_vp, 0);
+
+ /* Wait for all of the writes to complete */
+ if (hfsmp->hfs_catalog_vp)
+ vnode_waitforwrites(hfsmp->hfs_catalog_vp, 0, 0, 0, "hfs_metasync_all");
+ if (hfsmp->hfs_extents_vp)
+ vnode_waitforwrites(hfsmp->hfs_extents_vp, 0, 0, 0, "hfs_metasync_all");
+ if (hfsmp->hfs_attribute_vp)
+ vnode_waitforwrites(hfsmp->hfs_attribute_vp, 0, 0, 0, "hfs_metasync_all");
+
+ hfs_systemfile_unlock(hfsmp, lockflags);
+
+ return 0;
+}
+
+
/*ARGSUSED 1*/
static int
-hfs_btsync_callback(struct buf *bp, void *dummy)
+hfs_btsync_callback(struct buf *bp, __unused void *dummy)
{
buf_clearflags(bp, B_LOCKED);
(void) buf_bawrite(bp);
}
-__private_extern__
int
hfs_btsync(struct vnode *vp, int sync_transaction)
{
/*
* Remove a directory.
*/
-static int
+int
hfs_vnop_rmdir(ap)
struct vnop_rmdir_args /* {
struct vnode *a_dvp;
{
struct vnode *dvp = ap->a_dvp;
struct vnode *vp = ap->a_vp;
+ struct cnode *dcp = VTOC(dvp);
+ struct cnode *cp = VTOC(vp);
int error;
+ time_t orig_ctime;
+
+ orig_ctime = VTOC(vp)->c_ctime;
- if (!vnode_isdir(vp)) {
+ if (!S_ISDIR(cp->c_mode)) {
return (ENOTDIR);
}
if (dvp == vp) {
return (EINVAL);
}
- if ((error = hfs_lockpair(VTOC(dvp), VTOC(vp), HFS_EXCLUSIVE_LOCK)))
+
+ check_for_tracked_file(vp, orig_ctime, NAMESPACE_HANDLER_DELETE_OP, NULL);
+ cp = VTOC(vp);
+
+ if ((error = hfs_lockpair(dcp, cp, HFS_EXCLUSIVE_LOCK))) {
return (error);
+ }
+
+ /* Check for a race with rmdir on the parent directory */
+ if (dcp->c_flag & (C_DELETED | C_NOEXISTS)) {
+ hfs_unlockpair (dcp, cp);
+ return ENOENT;
+ }
+
+ //
+ // if the item is tracked but doesn't have a document_id, assign one and generate an fsevent for it
+ //
+ if ((cp->c_bsdflags & UF_TRACKED) && ((struct FndrExtendedDirInfo *)((char *)&cp->c_attr.ca_finderinfo + 16))->document_id == 0) {
+ uint32_t newid;
+
+ hfs_unlockpair(dcp, cp);
+
+ if (hfs_generate_document_id(VTOHFS(vp), &newid) == 0) {
+ hfs_lockpair(dcp, cp, HFS_EXCLUSIVE_LOCK);
+ ((struct FndrExtendedDirInfo *)((char *)&cp->c_attr.ca_finderinfo + 16))->document_id = newid;
+#if CONFIG_FSE
+ add_fsevent(FSE_DOCID_CHANGED, vfs_context_current(),
+ FSE_ARG_DEV, VTOHFS(vp)->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)0, // src inode #
+ FSE_ARG_INO, (ino64_t)cp->c_fileid, // dst inode #
+ FSE_ARG_INT32, newid,
+ FSE_ARG_DONE);
+#endif
+ } else {
+ // XXXdbg - couldn't get a new docid... what to do? can't really fail the rm...
+ hfs_lockpair(dcp, cp, HFS_EXCLUSIVE_LOCK);
+ }
+ }
- error = hfs_removedir(dvp, vp, ap->a_cnp, 0);
+ error = hfs_removedir(dvp, vp, ap->a_cnp, 0, 0);
- hfs_unlockpair(VTOC(dvp), VTOC(vp));
+ hfs_unlockpair(dcp, cp);
return (error);
}
*
* Both dvp and vp cnodes are locked
*/
-static int
+int
hfs_removedir(struct vnode *dvp, struct vnode *vp, struct componentname *cnp,
- int skip_reserve)
+ int skip_reserve, int only_unlink)
{
- vfs_context_t ctx = cnp->cn_context;
- struct proc *p = vfs_context_proc(ctx);
struct cnode *cp;
struct cnode *dcp;
struct hfsmount * hfsmp;
struct cat_desc desc;
- cat_cookie_t cookie;
int lockflags;
- int error = 0, started_tr = 0, got_cookie = 0;
+ int error = 0, started_tr = 0;
cp = VTOC(vp);
dcp = VTOC(dvp);
hfsmp = VTOHFS(vp);
- if (dcp == cp)
+ if (dcp == cp) {
return (EINVAL); /* cannot remove "." */
+ }
+ if (cp->c_flag & (C_NOEXISTS | C_DELETED)) {
+ return (0);
+ }
+ if (cp->c_entries != 0) {
+ return (ENOTEMPTY);
+ }
+
+ /*
+ * If the directory is open or in use (e.g. opendir() or current working
+ * directory for some process); wait for inactive/reclaim to actually
+ * remove cnode from the catalog. Both inactive and reclaim codepaths are capable
+ * of removing open-unlinked directories from the catalog, as well as getting rid
+ * of EAs still on the element. So change only_unlink to true, so that it will get
+ * cleaned up below.
+ *
+ * Otherwise, we can get into a weird old mess where the directory has C_DELETED,
+ * but it really means C_NOEXISTS because the item was actually removed from the
+ * catalog. Then when we try to remove the entry from the catalog later on, it won't
+ * really be there anymore.
+ */
+ if (vnode_isinuse(vp, 0)) {
+ only_unlink = 1;
+ }
+
+ /* Deal with directory hardlinks */
+ if (cp->c_flag & C_HARDLINK) {
+ /*
+ * Note that if we have a directory which was a hardlink at any point,
+ * its actual directory data is stored in the directory inode in the hidden
+ * directory rather than the leaf element(s) present in the namespace.
+ *
+ * If there are still other hardlinks to this directory,
+ * then we'll just eliminate this particular link and the vnode will still exist.
+ * If this is the last link to an empty directory, then we'll open-unlink the
+ * directory and it will be only tagged with C_DELETED (as opposed to C_NOEXISTS).
+ *
+ * We could also return EBUSY here.
+ */
+
+ return hfs_unlink(hfsmp, dvp, vp, cnp, skip_reserve);
+ }
+
+ /*
+ * In a few cases, we may want to allow the directory to persist in an
+ * open-unlinked state. If the directory is being open-unlinked (still has usecount
+ * references), or if it has EAs, or if it was being deleted as part of a rename,
+ * then we go ahead and move it to the hidden directory.
+ *
+ * If the directory is being open-unlinked, then we want to keep the catalog entry
+ * alive so that future EA calls and fchmod/fstat etc. do not cause issues later.
+ *
+ * If the directory had EAs, then we want to use the open-unlink trick so that the
+ * EA removal is not done in one giant transaction. Otherwise, it could cause a panic
+ * due to overflowing the journal.
+ *
+ * Finally, if it was deleted as part of a rename, we move it to the hidden directory
+ * in order to maintain rename atomicity.
+ *
+ * Note that the allow_dirs argument to hfs_removefile specifies that it is
+ * supposed to handle directories for this case.
+ */
+
+ if (((hfsmp->hfs_attribute_vp != NULL) &&
+ ((cp->c_attr.ca_recflags & kHFSHasAttributesMask) != 0)) ||
+ (only_unlink != 0)) {
+
+ int ret = hfs_removefile(dvp, vp, cnp, 0, 0, 1, NULL, only_unlink);
+ /*
+ * Even though hfs_vnop_rename calls vnode_recycle for us on tvp we call
+ * it here just in case we were invoked by rmdir() on a directory that had
+ * EAs. To ensure that we start reclaiming the space as soon as possible,
+ * we call vnode_recycle on the directory.
+ */
+ vnode_recycle(vp);
+
+ return ret;
+
+ }
+
+ dcp->c_flag |= C_DIR_MODIFICATION;
#if QUOTA
- (void)hfs_getinoquota(cp);
+ if (hfsmp->hfs_flags & HFS_QUOTAS)
+ (void)hfs_getinoquota(cp);
#endif
if ((error = hfs_start_transaction(hfsmp)) != 0) {
goto out;
}
started_tr = 1;
- if (!skip_reserve) {
- /*
- * Reserve some space in the Catalog file.
- */
- bzero(&cookie, sizeof(cookie));
- if ((error = cat_preflight(hfsmp, CAT_DELETE, &cookie, p))) {
- goto out;
- }
- got_cookie = 1;
- }
-
/*
* Verify the directory is empty (and valid).
* (Rmdir ".." won't be valid since
* the current directory and thus be
* non-empty.)
*/
- if (cp->c_entries != 0) {
- error = ENOTEMPTY;
- goto out;
- }
- if ((dcp->c_flags & APPEND) || (cp->c_flags & (IMMUTABLE | APPEND))) {
+ if ((dcp->c_bsdflags & APPEND) || (cp->c_bsdflags & (IMMUTABLE | APPEND))) {
error = EPERM;
goto out;
}
- if (cp->c_entries > 0)
- panic("hfs_rmdir: attempting to delete a non-empty directory!");
-
/* Remove the entry from the namei cache: */
cache_purge(vp);
* name passed in and parent id from dvp (instead of using
* the cp->c_desc which may have changed).
*/
- bzero(&desc, sizeof(desc));
- desc.cd_nameptr = cnp->cn_nameptr;
+ desc.cd_nameptr = (const u_int8_t *)cnp->cn_nameptr;
desc.cd_namelen = cnp->cn_namelen;
- desc.cd_parentcnid = dcp->c_cnid;
+ desc.cd_parentcnid = dcp->c_fileid;
desc.cd_cnid = cp->c_cnid;
+ desc.cd_flags = CD_ISDIR;
+ desc.cd_encoding = cp->c_encoding;
+ desc.cd_hint = 0;
+
+ if (!hfs_valid_cnode(hfsmp, dvp, cnp, cp->c_fileid, NULL, &error)) {
+ error = 0;
+ goto out;
+ }
/* Remove entry from catalog */
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_ATTRIBUTE | SFL_BITMAP, HFS_EXCLUSIVE_LOCK);
+
+ if (!skip_reserve) {
+ /*
+ * Reserve some space in the Catalog file.
+ */
+ if ((error = cat_preflight(hfsmp, CAT_DELETE, NULL, 0))) {
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ goto out;
+ }
+ }
+
error = cat_delete(hfsmp, &desc, &cp->c_attr);
- if (error == 0) {
- /* Delete any attributes, ignore errors */
- (void) hfs_removeallattr(hfsmp, cp->c_fileid);
+
+ if (!error) {
+ //
+ // if skip_reserve == 1 then we're being called from hfs_vnop_rename() and thus
+ // we don't need to touch the document_id as it's handled by the rename code.
+ // otherwise it's a normal remove and we need to save the document id in the
+ // per thread struct and clear it from the cnode.
+ //
+ struct doc_tombstone *ut;
+ ut = get_uthread_doc_tombstone();
+ if (!skip_reserve && (cp->c_bsdflags & UF_TRACKED) && should_save_docid_tombstone(ut, vp, cnp)) {
+
+ if (ut->t_lastop_document_id) {
+ clear_tombstone_docid(ut, hfsmp, NULL);
+ }
+ save_tombstone(hfsmp, dvp, vp, cnp, 1);
+
+ }
+
+ /* The parent lost a child */
+ if (dcp->c_entries > 0)
+ dcp->c_entries--;
+ DEC_FOLDERCOUNT(hfsmp, dcp->c_attr);
+ dcp->c_dirchangecnt++;
+ hfs_incr_gencount(dcp);
+
+ dcp->c_touch_chgtime = TRUE;
+ dcp->c_touch_modtime = TRUE;
+ dcp->c_flag |= C_MODIFIED;
+
+ hfs_update(dcp->c_vp, 0);
}
+
hfs_systemfile_unlock(hfsmp, lockflags);
if (error)
goto out;
#if QUOTA
- (void)hfs_chkiq(cp, -1, NOCRED, 0);
+ if (hfsmp->hfs_flags & HFS_QUOTAS)
+ (void)hfs_chkiq(cp, -1, NOCRED, 0);
#endif /* QUOTA */
- /* The parent lost a child */
- if (dcp->c_entries > 0)
- dcp->c_entries--;
- if (dcp->c_nlink > 0)
- dcp->c_nlink--;
- dcp->c_touch_chgtime = TRUE;
- dcp->c_touch_modtime = TRUE;
-
- dcp->c_flag |= C_FORCEUPDATE; // XXXdbg - don't screw around, force this guy out
-
- (void) hfs_update(dvp, 0);
- HFS_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
-
hfs_volupdate(hfsmp, VOL_RMDIR, (dcp->c_cnid == kHFSRootFolderID));
- cp->c_mode = 0; /* Makes the vnode go away...see inactive */
+ /* Mark C_NOEXISTS since the catalog entry is now gone */
cp->c_flag |= C_NOEXISTS;
+
out:
- HFS_KNOTE(vp, NOTE_DELETE);
+ dcp->c_flag &= ~C_DIR_MODIFICATION;
+ wakeup((caddr_t)&dcp->c_flag);
- if (got_cookie) {
- cat_postflight(hfsmp, &cookie, p);
- }
if (started_tr) {
hfs_end_transaction(hfsmp);
}
/*
* Remove a file or link.
*/
-static int
+int
hfs_vnop_remove(ap)
struct vnop_remove_args /* {
struct vnode *a_dvp;
{
struct vnode *dvp = ap->a_dvp;
struct vnode *vp = ap->a_vp;
- int error;
+ struct cnode *dcp = VTOC(dvp);
+ struct cnode *cp;
+ struct vnode *rvp = NULL;
+ int error=0, recycle_rsrc=0;
+ int recycle_vnode = 0;
+ uint32_t rsrc_vid = 0;
+ time_t orig_ctime;
if (dvp == vp) {
return (EINVAL);
}
- hfs_lock_truncate(VTOC(vp), TRUE);
+ orig_ctime = VTOC(vp)->c_ctime;
+ if (!vnode_isnamedstream(vp) && ((ap->a_flags & VNODE_REMOVE_SKIP_NAMESPACE_EVENT) == 0)) {
+ error = check_for_tracked_file(vp, orig_ctime, NAMESPACE_HANDLER_DELETE_OP, NULL);
+ if (error) {
+ // XXXdbg - decide on a policy for handling namespace handler failures!
+ // for now we just let them proceed.
+ }
+ }
+ error = 0;
+
+ cp = VTOC(vp);
+
+relock:
+
+ hfs_lock_truncate(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+
+ if ((error = hfs_lockpair(dcp, cp, HFS_EXCLUSIVE_LOCK))) {
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
+ if (rvp) {
+ vnode_put (rvp);
+ }
+ return (error);
+ }
+ //
+ // if the item is tracked but doesn't have a document_id, assign one and generate an fsevent for it
+ //
+ if ((cp->c_bsdflags & UF_TRACKED) && ((struct FndrExtendedDirInfo *)((char *)&cp->c_attr.ca_finderinfo + 16))->document_id == 0) {
+ uint32_t newid;
+
+ hfs_unlockpair(dcp, cp);
+
+ if (hfs_generate_document_id(VTOHFS(vp), &newid) == 0) {
+ hfs_lockpair(dcp, cp, HFS_EXCLUSIVE_LOCK);
+ ((struct FndrExtendedDirInfo *)((char *)&cp->c_attr.ca_finderinfo + 16))->document_id = newid;
+#if CONFIG_FSE
+ add_fsevent(FSE_DOCID_CHANGED, vfs_context_current(),
+ FSE_ARG_DEV, VTOHFS(vp)->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)0, // src inode #
+ FSE_ARG_INO, (ino64_t)cp->c_fileid, // dst inode #
+ FSE_ARG_INT32, newid,
+ FSE_ARG_DONE);
+#endif
+ } else {
+ // XXXdbg - couldn't get a new docid... what to do? can't really fail the rm...
+ hfs_lockpair(dcp, cp, HFS_EXCLUSIVE_LOCK);
+ }
+ }
+
+ /*
+ * Lazily respond to determining if there is a valid resource fork
+ * vnode attached to 'cp' if it is a regular file or symlink.
+ * If the vnode does not exist, then we may proceed without having to
+ * create it.
+ *
+ * If, however, it does exist, then we need to acquire an iocount on the
+ * vnode after acquiring its vid. This ensures that if we have to do I/O
+ * against it, it can't get recycled from underneath us in the middle
+ * of this call.
+ *
+ * Note: this function may be invoked for directory hardlinks, so just skip these
+ * steps if 'vp' is a directory.
+ */
+
+ if ((vp->v_type == VLNK) || (vp->v_type == VREG)) {
+ if ((cp->c_rsrc_vp) && (rvp == NULL)) {
+ /* We need to acquire the rsrc vnode */
+ rvp = cp->c_rsrc_vp;
+ rsrc_vid = vnode_vid (rvp);
+
+ /* Unlock everything to acquire iocount on the rsrc vnode */
+ hfs_unlock_truncate (cp, HFS_LOCK_DEFAULT);
+ hfs_unlockpair (dcp, cp);
+ /* Use the vid to maintain identity on rvp */
+ if (vnode_getwithvid(rvp, rsrc_vid)) {
+ /*
+ * If this fails, then it was recycled or
+ * reclaimed in the interim. Reset fields and
+ * start over.
+ */
+ rvp = NULL;
+ rsrc_vid = 0;
+ }
+ goto relock;
+ }
+ }
+
+ /*
+ * Check to see if we raced rmdir for the parent directory
+ * hfs_removefile already checks for a race on vp/cp
+ */
+ if (dcp->c_flag & (C_DELETED | C_NOEXISTS)) {
+ error = ENOENT;
+ goto rm_done;
+ }
+
+ error = hfs_removefile(dvp, vp, ap->a_cnp, ap->a_flags, 0, 0, NULL, 0);
+
+ /*
+ * If the remove succeeded in deleting the file, then we may need to mark
+ * the resource fork for recycle so that it is reclaimed as quickly
+ * as possible. If it were not recycled quickly, then this resource fork
+ * vnode could keep a v_parent reference on the data fork, which prevents it
+ * from going through reclaim (by giving it extra usecounts), except in the force-
+ * unmount case.
+ *
+ * However, a caveat: we need to continue to supply resource fork
+ * access to open-unlinked files even if the resource fork is not open. This is
+ * a requirement for the compressed files work. Luckily, hfs_vgetrsrc will handle
+ * this already if the data fork has been re-parented to the hidden directory.
+ *
+ * As a result, all we really need to do here is mark the resource fork vnode
+ * for recycle. If it goes out of core, it can be brought in again if needed.
+ * If the cnode was instead marked C_NOEXISTS, then there wouldn't be any
+ * more work.
+ */
+ if (error == 0) {
+ hfs_hotfile_deleted(vp);
+
+ if (rvp) {
+ recycle_rsrc = 1;
+ }
+ /*
+ * If the target was actually removed from the catalog schedule it for
+ * full reclamation/inactivation. We hold an iocount on it so it should just
+ * get marked with MARKTERM
+ */
+ if (cp->c_flag & C_NOEXISTS) {
+ recycle_vnode = 1;
+ }
+ }
+
+
+ /*
+ * Drop the truncate lock before unlocking the cnode
+ * (which can potentially perform a vnode_put and
+ * recycle the vnode which in turn might require the
+ * truncate lock)
+ */
+rm_done:
+ hfs_unlockpair(dcp, cp);
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
- if ((error = hfs_lockpair(VTOC(dvp), VTOC(vp), HFS_EXCLUSIVE_LOCK)))
- goto out;
+ if (recycle_rsrc) {
+ /* inactive or reclaim on rvp will clean up the blocks from the rsrc fork */
+ vnode_recycle(rvp);
+ }
+ if (recycle_vnode) {
+ vnode_recycle (vp);
+ }
- error = hfs_removefile(dvp, vp, ap->a_cnp, ap->a_flags, 0);
+ if (rvp) {
+ /* drop iocount on rsrc fork, was obtained at beginning of fxn */
+ vnode_put(rvp);
+ }
- hfs_unlockpair(VTOC(dvp), VTOC(vp));
-out:
- hfs_unlock_truncate(VTOC(vp));
return (error);
}
-static int
+int
hfs_removefile_callback(struct buf *bp, void *hfsmp) {
if ( !(buf_flags(bp) & B_META))
- panic("hfs: symlink bp @ 0x%x is not marked meta-data!\n", bp);
+ panic("hfs: symlink bp @ %p is not marked meta-data!\n", bp);
/*
* it's part of the current transaction, kill it.
*/
* hfs_removefile
*
* Similar to hfs_vnop_remove except there are additional options.
+ * This function may be used to remove directories if they have
+ * lots of EA's -- note the 'allow_dirs' argument.
+ *
+ * This function is able to delete blocks & fork data for the resource
+ * fork even if it does not exist in core (and have a backing vnode).
+ * It should infer the correct behavior based on the number of blocks
+ * in the cnode and whether or not the resource fork pointer exists or
+ * not. As a result, one only need pass in the 'vp' corresponding to the
+ * data fork of this file (or main vnode in the case of a directory).
+ * Passing in a resource fork will result in an error.
+ *
+ * Because we do not create any vnodes in this function, we are not at
+ * risk of deadlocking against ourselves by double-locking.
*
* Requires cnode and truncate locks to be held.
*/
-static int
+int
hfs_removefile(struct vnode *dvp, struct vnode *vp, struct componentname *cnp,
- int flags, int skip_reserve)
+ int flags, int skip_reserve, int allow_dirs,
+ __unused struct vnode *rvp, int only_unlink)
{
- struct vnode *rvp = NULL;
struct cnode *cp;
struct cnode *dcp;
+ struct vnode *rsrc_vp = NULL;
struct hfsmount *hfsmp;
struct cat_desc desc;
struct timeval tv;
- vfs_context_t ctx = cnp->cn_context;
int dataforkbusy = 0;
int rsrcforkbusy = 0;
- int truncated = 0;
- cat_cookie_t cookie;
int lockflags;
int error = 0;
- int started_tr = 0, got_cookie = 0;
- int isbigfile = 0;
- cnid_t real_cnid = 0;
-
- /* Directories should call hfs_rmdir! */
- if (vnode_isdir(vp)) {
- return (EISDIR);
- }
+ int started_tr = 0;
+ int isbigfile = 0, defer_remove=0, isdir=0;
+ int update_vh = 0;
cp = VTOC(vp);
dcp = VTOC(dvp);
hfsmp = VTOHFS(vp);
+ /* Check if we lost a race post lookup. */
if (cp->c_flag & (C_NOEXISTS | C_DELETED)) {
- return 0;
+ return (0);
}
-
- // if it's not a hardlink, check that the parent
- // cnid is the same as the directory cnid
- if ( (cp->c_flag & C_HARDLINK) == 0
- && (cp->c_parentcnid != hfsmp->hfs_privdir_desc.cd_cnid)
- && (cp->c_parentcnid != dcp->c_cnid)) {
- error = EINVAL;
- goto out;
+
+ if (!hfs_valid_cnode(hfsmp, dvp, cnp, cp->c_fileid, NULL, &error)) {
+ return 0;
}
/* Make sure a remove is permitted */
if (VNODE_IS_RSRC(vp)) {
- error = EPERM;
- goto out;
+ return (EPERM);
+ }
+ else {
+ /*
+ * We know it's a data fork.
+ * Probe the cnode to see if we have a valid resource fork
+ * in hand or not.
+ */
+ rsrc_vp = cp->c_rsrc_vp;
+ }
+
+ /* Don't allow deleting the journal or journal_info_block. */
+ if (hfs_is_journal_file(hfsmp, cp)) {
+ return (EPERM);
}
/*
- * Aquire a vnode for a non-empty resource fork.
- * (needed for hfs_truncate)
+ * Hard links require special handling.
*/
- if (cp->c_blocks - VTOF(vp)->ff_blocks) {
- error = hfs_vgetrsrc(hfsmp, vp, &rvp, 0);
- if (error)
- goto out;
+ if (cp->c_flag & C_HARDLINK) {
+ if ((flags & VNODE_REMOVE_NODELETEBUSY) && vnode_isinuse(vp, 0)) {
+ return (EBUSY);
+ } else {
+ /* A directory hard link with a link count of one is
+ * treated as a regular directory. Therefore it should
+ * only be removed using rmdir().
+ */
+ if ((vnode_isdir(vp) == 1) && (cp->c_linkcount == 1) &&
+ (allow_dirs == 0)) {
+ return (EPERM);
+ }
+ return hfs_unlink(hfsmp, dvp, vp, cnp, skip_reserve);
+ }
}
- // XXXdbg - don't allow deleting the journal or journal_info_block
- if (hfsmp->jnl && cp->c_datafork) {
- struct HFSPlusExtentDescriptor *extd;
-
- extd = &cp->c_datafork->ff_extents[0];
- if (extd->startBlock == HFSTOVCB(hfsmp)->vcbJinfoBlock || extd->startBlock == hfsmp->jnl_start) {
- error = EPERM;
- goto out;
- }
+ /* Directories should call hfs_rmdir! (unless they have a lot of attributes) */
+ if (vnode_isdir(vp)) {
+ if (allow_dirs == 0)
+ return (EPERM); /* POSIX */
+ isdir = 1;
}
+ /* Sanity check the parent ids. */
+ if ((cp->c_parentcnid != hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid) &&
+ (cp->c_parentcnid != dcp->c_fileid)) {
+ return (EINVAL);
+ }
+
+ dcp->c_flag |= C_DIR_MODIFICATION;
+
+ // this guy is going away so mark him as such
+ cp->c_flag |= C_DELETED;
+
+ /* Remove our entry from the namei cache. */
+ cache_purge(vp);
+
/*
- * Check if this file is being used.
+ * If the caller was operating on a file (as opposed to a
+ * directory with EAs), then we need to figure out
+ * whether or not it has a valid resource fork vnode.
+ *
+ * If there was a valid resource fork vnode, then we need
+ * to use hfs_truncate to eliminate its data. If there is
+ * no vnode, then we hold the cnode lock which would
+ * prevent it from being created. As a result,
+ * we can use the data deletion functions which do not
+ * require that a cnode/vnode pair exist.
*/
- if (vnode_isinuse(vp, 0))
- dataforkbusy = 1;
- if (rvp && vnode_isinuse(rvp, 0))
- rsrcforkbusy = 1;
- // need this to check if we have to break the deletion
- // into multiple pieces
- isbigfile = (VTOC(vp)->c_datafork->ff_size >= HFS_BIGFILE_SIZE);
+ /* Check if this file is being used. */
+ if (isdir == 0) {
+ dataforkbusy = vnode_isinuse(vp, 0);
+ /*
+ * At this point, we know that 'vp' points to the
+ * a data fork because we checked it up front. And if
+ * there is no rsrc fork, rsrc_vp will be NULL.
+ */
+ if (rsrc_vp && (cp->c_blocks - VTOF(vp)->ff_blocks)) {
+ rsrcforkbusy = vnode_isinuse(rsrc_vp, 0);
+ }
+ }
+
+ /* Check if we have to break the deletion into multiple pieces. */
+ if (isdir == 0)
+ isbigfile = cp->c_datafork->ff_size >= HFS_BIGFILE_SIZE;
+
+ /* Check if the file has xattrs. If it does we'll have to delete them in
+ individual transactions in case there are too many */
+ if ((hfsmp->hfs_attribute_vp != NULL) &&
+ (cp->c_attr.ca_recflags & kHFSHasAttributesMask) != 0) {
+ defer_remove = 1;
+ }
+
+ /* If we are explicitly told to only unlink item and move to hidden dir, then do it */
+ if (only_unlink) {
+ defer_remove = 1;
+ }
/*
* Carbon semantics prohibit deleting busy files.
*/
if (dataforkbusy || rsrcforkbusy) {
if ((flags & VNODE_REMOVE_NODELETEBUSY) ||
- (hfsmp->hfs_privdir_desc.cd_cnid == 0)) {
+ (hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid == 0)) {
error = EBUSY;
goto out;
}
}
#if QUOTA
- (void)hfs_getinoquota(cp);
+ if (hfsmp->hfs_flags & HFS_QUOTAS)
+ (void)hfs_getinoquota(cp);
#endif /* QUOTA */
-
- /*
- * We do the ubc_setsize before the hfs_truncate
- * since we'll be inside a transaction.
+
+ /*
+ * Do a ubc_setsize to indicate we need to wipe contents if:
+ * 1) item is a regular file.
+ * 2) Neither fork is busy AND we are not told to unlink this.
+ *
+ * We need to check for the defer_remove since it can be set without
+ * having a busy data or rsrc fork
*/
- if ((cp->c_flag & C_HARDLINK) == 0 &&
- (!dataforkbusy || !rsrcforkbusy)) {
+ if (isdir == 0 && (!dataforkbusy || !rsrcforkbusy) && (defer_remove == 0)) {
/*
* A ubc_setsize can cause a pagein so defer it
* until after the cnode lock is dropped. The
if (!dataforkbusy && cp->c_datafork->ff_blocks && !isbigfile) {
cp->c_flag |= C_NEED_DATA_SETSIZE;
}
- if (!rsrcforkbusy && rvp) {
+ if (!rsrcforkbusy && rsrc_vp) {
cp->c_flag |= C_NEED_RSRC_SETSIZE;
}
- } else {
- struct cat_desc cndesc;
-
- // for hard links, re-lookup the name that was passed
- // in so we get the correct cnid for the name (as
- // opposed to the c_cnid in the cnode which could have
- // been changed before this node got locked).
- bzero(&cndesc, sizeof(cndesc));
- cndesc.cd_nameptr = cnp->cn_nameptr;
- cndesc.cd_namelen = cnp->cn_namelen;
- cndesc.cd_parentcnid = VTOC(dvp)->c_cnid;
- cndesc.cd_hint = VTOC(dvp)->c_childhint;
-
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
-
- if (cat_lookup(hfsmp, &cndesc, 0, NULL, NULL, NULL, &real_cnid) != 0) {
- hfs_systemfile_unlock(hfsmp, lockflags);
- error = ENOENT;
- goto out;
- }
-
- hfs_systemfile_unlock(hfsmp, lockflags);
}
if ((error = hfs_start_transaction(hfsmp)) != 0) {
}
started_tr = 1;
- if (!skip_reserve) {
- /*
- * Reserve some space in the Catalog file.
- */
- if ((error = cat_preflight(hfsmp, CAT_DELETE, &cookie, 0))) {
- goto out;
- }
- got_cookie = 1;
- }
-
- /* Remove our entry from the namei cache. */
- cache_purge(vp);
-
// XXXdbg - if we're journaled, kill any dirty symlink buffers
- if (hfsmp->jnl && vnode_islnk(vp))
+ if (hfsmp->jnl && vnode_islnk(vp) && (defer_remove == 0)) {
buf_iterate(vp, hfs_removefile_callback, BUF_SKIP_NONLOCKED, (void *)hfsmp);
+ }
/*
- * Truncate any non-busy forks. Busy forks will
- * get trucated when their vnode goes inactive.
+ * Prepare to truncate any non-busy forks. Busy forks will
+ * get truncated when their vnode goes inactive.
+ * Note that we will only enter this region if we
+ * can avoid creating an open-unlinked file. If
+ * either region is busy, we will have to create an open
+ * unlinked file.
*
- * Since we're already inside a transaction,
- * tell hfs_truncate to skip the ubc_setsize.
- *
- * (Note: hard links are truncated in VOP_INACTIVE)
+ * Since we are deleting the file, we need to stagger the runtime
+ * modifications to do things in such a way that a crash won't
+ * result in us getting overlapped extents or any other
+ * bad inconsistencies. As such, we call prepare_release_storage
+ * which updates the UBC, updates quota information, and releases
+ * any loaned blocks that belong to this file. No actual
+ * truncation or bitmap manipulation is done until *AFTER*
+ * the catalog record is removed.
*/
- if ((cp->c_flag & C_HARDLINK) == 0) {
- int mode = cp->c_mode;
-
+ if (isdir == 0 && (!dataforkbusy && !rsrcforkbusy) && (only_unlink == 0)) {
+
if (!dataforkbusy && !isbigfile && cp->c_datafork->ff_blocks != 0) {
- cp->c_mode = 0; /* Suppress hfs_update */
- error = hfs_truncate(vp, (off_t)0, IO_NDELAY, 1, ctx);
- cp->c_mode = mode;
- if (error)
+
+ error = hfs_prepare_release_storage (hfsmp, vp);
+ if (error) {
goto out;
- truncated = 1;
+ }
+ update_vh = 1;
}
- if (!rsrcforkbusy && rvp) {
- cp->c_mode = 0; /* Suppress hfs_update */
- error = hfs_truncate(rvp, (off_t)0, IO_NDELAY, 1, ctx);
- cp->c_mode = mode;
- if (error)
+
+ /*
+ * If the resource fork vnode does not exist, we can skip this step.
+ */
+ if (!rsrcforkbusy && rsrc_vp) {
+ error = hfs_prepare_release_storage (hfsmp, rsrc_vp);
+ if (error) {
goto out;
- truncated = 1;
+ }
+ update_vh = 1;
}
}
-
+
/*
* Protect against a race with rename by using the component
* name passed in and parent id from dvp (instead of using
- * the cp->c_desc which may have changed).
+ * the cp->c_desc which may have changed). Also, be aware that
+ * because we allow directories to be passed in, we need to special case
+ * this temporary descriptor in case we were handed a directory.
*/
- desc.cd_flags = 0;
+ if (isdir) {
+ desc.cd_flags = CD_ISDIR;
+ }
+ else {
+ desc.cd_flags = 0;
+ }
desc.cd_encoding = cp->c_desc.cd_encoding;
- desc.cd_nameptr = cnp->cn_nameptr;
+ desc.cd_nameptr = (const u_int8_t *)cnp->cn_nameptr;
desc.cd_namelen = cnp->cn_namelen;
- desc.cd_parentcnid = dcp->c_cnid;
+ desc.cd_parentcnid = dcp->c_fileid;
desc.cd_hint = cp->c_desc.cd_hint;
- if (real_cnid) {
- // if it was a hardlink we had to re-lookup the cnid
- desc.cd_cnid = real_cnid;
- } else {
- desc.cd_cnid = cp->c_cnid;
- }
+ desc.cd_cnid = cp->c_cnid;
microtime(&tv);
/*
- * There are 3 remove cases to consider:
- * 1. File is a hardlink ==> remove the link
- * 2. File is busy (in use) ==> move/rename the file
- * 3. File is not in use ==> remove the file
+ * There are two cases to consider:
+ * 1. File/Dir is busy/big/defer_remove ==> move/rename the file/dir
+ * 2. File is not in use ==> remove the file
+ *
+ * We can get a directory in case 1 because it may have had lots of attributes,
+ * which need to get removed here.
*/
-
- if (cp->c_flag & C_HARDLINK) {
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
-
- /* Delete the link record */
- error = cat_delete(hfsmp, &desc, &cp->c_attr);
- if (error == 0) {
- /* Update the parent directory */
- if (dcp->c_entries > 0)
- dcp->c_entries--;
- if (dcp->c_nlink > 0)
- dcp->c_nlink--;
- dcp->c_ctime = tv.tv_sec;
- dcp->c_mtime = tv.tv_sec;
- (void ) cat_update(hfsmp, &dcp->c_desc, &dcp->c_attr, NULL, NULL);
-
- if (--cp->c_nlink < 1) {
- char inodename[32];
- char delname[32];
- struct cat_desc to_desc;
- struct cat_desc from_desc;
-
- /*
- * This is now esentially an open deleted file.
- * Rename it to reflect this state which makes
- * orphan file cleanup easier (see hfs_remove_orphans).
- * Note: a rename failure here is not fatal.
- */
- MAKE_INODE_NAME(inodename, cp->c_rdev);
- bzero(&from_desc, sizeof(from_desc));
- from_desc.cd_nameptr = inodename;
- from_desc.cd_namelen = strlen(inodename);
- from_desc.cd_parentcnid = hfsmp->hfs_privdir_desc.cd_cnid;
- from_desc.cd_flags = 0;
- from_desc.cd_cnid = cp->c_fileid;
-
- MAKE_DELETED_NAME(delname, cp->c_fileid);
- bzero(&to_desc, sizeof(to_desc));
- to_desc.cd_nameptr = delname;
- to_desc.cd_namelen = strlen(delname);
- to_desc.cd_parentcnid = hfsmp->hfs_privdir_desc.cd_cnid;
- to_desc.cd_flags = 0;
- to_desc.cd_cnid = cp->c_fileid;
-
- error = cat_rename(hfsmp, &from_desc, &hfsmp->hfs_privdir_desc,
- &to_desc, (struct cat_desc *)NULL);
- if (error != 0) {
- panic("hfs_removefile: error %d from cat_rename(%s %s) cp 0x%x\n",
- inodename, delname, cp);
- }
- if (error == 0) {
- /* Update the file's state */
- cp->c_flag |= C_DELETED;
- cp->c_ctime = tv.tv_sec;
- (void) cat_update(hfsmp, &to_desc, &cp->c_attr, NULL, NULL);
- }
- } else {
- /* Update the file's state */
- cp->c_ctime = tv.tv_sec;
- (void) cat_update(hfsmp, &cp->c_desc, &cp->c_attr, NULL, NULL);
- }
- }
- hfs_systemfile_unlock(hfsmp, lockflags);
- if (error != 0)
- goto out;
-
- hfs_volupdate(hfsmp, VOL_RMFILE, (dcp->c_cnid == kHFSRootFolderID));
-
- } else if (dataforkbusy || rsrcforkbusy || isbigfile) {
+ if (dataforkbusy || rsrcforkbusy || isbigfile || defer_remove) {
char delname[32];
struct cat_desc to_desc;
struct cat_desc todir_desc;
/*
- * Orphan this file (move to hidden directory).
+ * Orphan this file or directory (move to hidden directory).
+ * Again, we need to take care that we treat directories as directories,
+ * and files as files. Because directories with attributes can be passed in
+ * check to make sure that we have a directory or a file before filling in the
+ * temporary descriptor's flags. We keep orphaned directories AND files in
+ * the FILE_HARDLINKS private directory since we're generalizing over all
+ * orphaned filesystem objects.
*/
bzero(&todir_desc, sizeof(todir_desc));
todir_desc.cd_parentcnid = 2;
- MAKE_DELETED_NAME(delname, cp->c_fileid);
+ MAKE_DELETED_NAME(delname, sizeof(delname), cp->c_fileid);
bzero(&to_desc, sizeof(to_desc));
- to_desc.cd_nameptr = delname;
+ to_desc.cd_nameptr = (const u_int8_t *)delname;
to_desc.cd_namelen = strlen(delname);
- to_desc.cd_parentcnid = hfsmp->hfs_privdir_desc.cd_cnid;
- to_desc.cd_flags = 0;
+ to_desc.cd_parentcnid = hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid;
+ if (isdir) {
+ to_desc.cd_flags = CD_ISDIR;
+ }
+ else {
+ to_desc.cd_flags = 0;
+ }
to_desc.cd_cnid = cp->c_cnid;
lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
+ if (!skip_reserve) {
+ if ((error = cat_preflight(hfsmp, CAT_RENAME, NULL, 0))) {
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ goto out;
+ }
+ }
error = cat_rename(hfsmp, &desc, &todir_desc,
&to_desc, (struct cat_desc *)NULL);
if (error == 0) {
- hfsmp->hfs_privdir_attr.ca_entries++;
- (void) cat_update(hfsmp, &hfsmp->hfs_privdir_desc,
- &hfsmp->hfs_privdir_attr, NULL, NULL);
+ hfsmp->hfs_private_attr[FILE_HARDLINKS].ca_entries++;
+ if (isdir == 1) {
+ INC_FOLDERCOUNT(hfsmp, hfsmp->hfs_private_attr[FILE_HARDLINKS]);
+ }
+ (void) cat_update(hfsmp, &hfsmp->hfs_private_desc[FILE_HARDLINKS],
+ &hfsmp->hfs_private_attr[FILE_HARDLINKS], NULL, NULL);
/* Update the parent directory */
if (dcp->c_entries > 0)
dcp->c_entries--;
- if (dcp->c_nlink > 0)
- dcp->c_nlink--;
+ if (isdir == 1) {
+ DEC_FOLDERCOUNT(hfsmp, dcp->c_attr);
+ }
+ dcp->c_dirchangecnt++;
+ hfs_incr_gencount(dcp);
+
dcp->c_ctime = tv.tv_sec;
dcp->c_mtime = tv.tv_sec;
(void) cat_update(hfsmp, &dcp->c_desc, &dcp->c_attr, NULL, NULL);
- /* Update the file's state */
+ /* Update the file or directory's state */
cp->c_flag |= C_DELETED;
cp->c_ctime = tv.tv_sec;
- --cp->c_nlink;
+ --cp->c_linkcount;
(void) cat_update(hfsmp, &to_desc, &cp->c_attr, NULL, NULL);
}
hfs_systemfile_unlock(hfsmp, lockflags);
if (error)
goto out;
- } else /* Not busy */ {
-
- if (cp->c_blocks > 0) {
- printf("hfs_remove: attempting to delete a non-empty file %s\n",
- cp->c_desc.cd_nameptr);
- error = EBUSY;
- goto out;
+ }
+ else {
+ /*
+ * Nobody is using this item; we can safely remove everything.
+ */
+ struct filefork *temp_rsrc_fork = NULL;
+#if QUOTA
+ off_t savedbytes;
+ int blksize = hfsmp->blockSize;
+#endif
+ u_int32_t fileid = cp->c_fileid;
+
+ /*
+ * Figure out if we need to read the resource fork data into
+ * core before wiping out the catalog record.
+ *
+ * 1) Must not be a directory
+ * 2) cnode's c_rsrcfork ptr must be NULL.
+ * 3) rsrc fork must have actual blocks
+ */
+ if ((isdir == 0) && (cp->c_rsrcfork == NULL) &&
+ (cp->c_blocks - VTOF(vp)->ff_blocks)) {
+ /*
+ * The resource fork vnode & filefork did not exist.
+ * Create a temporary one for use in this function only.
+ */
+ MALLOC_ZONE (temp_rsrc_fork, struct filefork *, sizeof (struct filefork), M_HFSFORK, M_WAITOK);
+ bzero(temp_rsrc_fork, sizeof(struct filefork));
+ temp_rsrc_fork->ff_cp = cp;
+ rl_init(&temp_rsrc_fork->ff_invalidranges);
+ }
+
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_ATTRIBUTE | SFL_BITMAP, HFS_EXCLUSIVE_LOCK);
+
+ /* Look up the resource fork first, if necessary */
+ if (temp_rsrc_fork) {
+ error = cat_lookup (hfsmp, &desc, 1, 0, (struct cat_desc*) NULL,
+ (struct cat_attr*) NULL, &temp_rsrc_fork->ff_data, NULL);
+ if (error) {
+ FREE_ZONE (temp_rsrc_fork, sizeof(struct filefork), M_HFSFORK);
+ hfs_systemfile_unlock (hfsmp, lockflags);
+ goto out;
+ }
}
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
-
- error = cat_delete(hfsmp, &desc, &cp->c_attr);
-
- if (error && error != ENXIO && error != ENOENT && truncated) {
- if ((cp->c_datafork && cp->c_datafork->ff_size != 0) ||
- (cp->c_rsrcfork && cp->c_rsrcfork->ff_size != 0)) {
- panic("hfs: remove: couldn't delete a truncated file! (%d, data sz %lld; rsrc sz %lld)",
- error, cp->c_datafork->ff_size, cp->c_rsrcfork->ff_size);
- } else {
- printf("hfs: remove: strangely enough, deleting truncated file %s (%d) got err %d\n",
- cp->c_desc.cd_nameptr, cp->c_attr.ca_fileid, error);
+ if (!skip_reserve) {
+ if ((error = cat_preflight(hfsmp, CAT_DELETE, NULL, 0))) {
+ if (temp_rsrc_fork) {
+ FREE_ZONE (temp_rsrc_fork, sizeof(struct filefork), M_HFSFORK);
+ }
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ goto out;
}
}
+
+ error = cat_delete(hfsmp, &desc, &cp->c_attr);
+
+ if (error && error != ENXIO && error != ENOENT) {
+ printf("hfs_removefile: deleting file %s (id=%d) vol=%s err=%d\n",
+ cp->c_desc.cd_nameptr, cp->c_attr.ca_fileid, hfsmp->vcbVN, error);
+ }
+
if (error == 0) {
- /* Delete any attributes, ignore errors */
- (void) hfs_removeallattr(hfsmp, cp->c_fileid);
-
/* Update the parent directory */
if (dcp->c_entries > 0)
dcp->c_entries--;
- if (dcp->c_nlink > 0)
- dcp->c_nlink--;
+ dcp->c_dirchangecnt++;
+ hfs_incr_gencount(dcp);
+
dcp->c_ctime = tv.tv_sec;
dcp->c_mtime = tv.tv_sec;
(void) cat_update(hfsmp, &dcp->c_desc, &dcp->c_attr, NULL, NULL);
}
hfs_systemfile_unlock(hfsmp, lockflags);
- if (error)
- goto out;
+ if (error) {
+ if (temp_rsrc_fork) {
+ FREE_ZONE (temp_rsrc_fork, sizeof(struct filefork), M_HFSFORK);
+ }
+ goto out;
+ }
+
+ /*
+ * Now that we've wiped out the catalog record, the file effectively doesn't
+ * exist anymore. So update the quota records to reflect the loss of the
+ * data fork and the resource fork.
+ */
#if QUOTA
- (void)hfs_chkiq(cp, -1, NOCRED, 0);
-#endif /* QUOTA */
+ if (cp->c_datafork->ff_blocks > 0) {
+ savedbytes = ((off_t)cp->c_datafork->ff_blocks * (off_t)blksize);
+ (void) hfs_chkdq(cp, (int64_t)-(savedbytes), NOCRED, 0);
+ }
+
+ /*
+ * We may have just deleted the catalog record for a resource fork even
+ * though it did not exist in core as a vnode. However, just because there
+ * was a resource fork pointer in the cnode does not mean that it had any blocks.
+ */
+ if (temp_rsrc_fork || cp->c_rsrcfork) {
+ if (cp->c_rsrcfork) {
+ if (cp->c_rsrcfork->ff_blocks > 0) {
+ savedbytes = ((off_t)cp->c_rsrcfork->ff_blocks * (off_t)blksize);
+ (void) hfs_chkdq(cp, (int64_t)-(savedbytes), NOCRED, 0);
+ }
+ }
+ else {
+ /* we must have used a temporary fork */
+ savedbytes = ((off_t)temp_rsrc_fork->ff_blocks * (off_t)blksize);
+ (void) hfs_chkdq(cp, (int64_t)-(savedbytes), NOCRED, 0);
+ }
+ }
+
+ if (hfsmp->hfs_flags & HFS_QUOTAS) {
+ (void)hfs_chkiq(cp, -1, NOCRED, 0);
+ }
+#endif
+
+ /*
+ * If we didn't get any errors deleting the catalog entry, then go ahead
+ * and release the backing store now. The filefork pointers are still valid.
+ */
+ if (temp_rsrc_fork) {
+ error = hfs_release_storage (hfsmp, cp->c_datafork, temp_rsrc_fork, fileid);
+ }
+ else {
+ /* if cp->c_rsrcfork == NULL, hfs_release_storage will skip over it. */
+ error = hfs_release_storage (hfsmp, cp->c_datafork, cp->c_rsrcfork, fileid);
+ }
+ if (error) {
+ /*
+ * If we encountered an error updating the extents and bitmap,
+ * mark the volume inconsistent. At this point, the catalog record has
+ * already been deleted, so we can't recover it at this point. We need
+ * to proceed and update the volume header and mark the cnode C_NOEXISTS.
+ * The subsequent fsck should be able to recover the free space for us.
+ */
+ hfs_mark_inconsistent(hfsmp, HFS_OP_INCOMPLETE);
+ }
+ else {
+ /* reset update_vh to 0, since hfs_release_storage should have done it for us */
+ update_vh = 0;
+ }
- cp->c_mode = 0;
- truncated = 0; // because the catalog entry is gone
- cp->c_flag |= C_NOEXISTS;
- cp->c_touch_chgtime = TRUE; /* XXX needed ? */
- --cp->c_nlink;
+ /* Get rid of the temporary rsrc fork */
+ if (temp_rsrc_fork) {
+ FREE_ZONE (temp_rsrc_fork, sizeof(struct filefork), M_HFSFORK);
+ }
+ cp->c_flag |= C_NOEXISTS;
+ cp->c_flag &= ~C_DELETED;
+
+ cp->c_touch_chgtime = TRUE;
+ --cp->c_linkcount;
+
+ /*
+ * We must never get a directory if we're in this else block. We could
+ * accidentally drop the number of files in the volume header if we did.
+ */
hfs_volupdate(hfsmp, VOL_RMFILE, (dcp->c_cnid == kHFSRootFolderID));
+
}
+ //
+ // if skip_reserve == 1 then we're being called from hfs_vnop_rename() and thus
+ // we don't need to touch the document_id as it's handled by the rename code.
+ // otherwise it's a normal remove and we need to save the document id in the
+ // per thread struct and clear it from the cnode.
+ //
+ struct doc_tombstone *ut;
+ ut = get_uthread_doc_tombstone();
+ if (!error && !skip_reserve && (cp->c_bsdflags & UF_TRACKED) && should_save_docid_tombstone(ut, vp, cnp)) {
+
+ if (ut->t_lastop_document_id) {
+ clear_tombstone_docid(ut, hfsmp, NULL);
+ }
+ save_tombstone(hfsmp, dvp, vp, cnp, 1);
+
+ }
+
+
/*
* All done with this cnode's descriptor...
*
- * Note: all future catalog calls for this cnode must be
- * by fileid only. This is OK for HFS (which doesn't have
- * file thread records) since HFS doesn't support hard
- * links or the removal of busy files.
+ * Note: all future catalog calls for this cnode must be by
+ * fileid only. This is OK for HFS (which doesn't have file
+ * thread records) since HFS doesn't support the removal of
+ * busy files.
*/
cat_releasedesc(&cp->c_desc);
- HFS_KNOTE(dvp, NOTE_WRITE);
-
out:
- if (got_cookie) {
- cat_postflight(hfsmp, &cookie, 0);
- }
-
- /* Commit the truncation to the catalog record */
- if (truncated) {
- cp->c_flag |= C_FORCEUPDATE;
- cp->c_touch_chgtime = TRUE;
- cp->c_touch_modtime = TRUE;
- (void) hfs_update(vp, 0);
+ if (error) {
+ cp->c_flag &= ~C_DELETED;
}
+
+ if (update_vh) {
+ /*
+ * If we bailed out earlier, we may need to update the volume header
+ * to deal with the borrowed blocks accounting.
+ */
+ hfs_volupdate (hfsmp, VOL_UPDATE, 0);
+ }
if (started_tr) {
hfs_end_transaction(hfsmp);
}
- HFS_KNOTE(vp, NOTE_DELETE);
- if (rvp) {
- HFS_KNOTE(rvp, NOTE_DELETE);
- /* Defer the vnode_put on rvp until the hfs_unlock(). */
- cp->c_flag |= C_NEED_RVNODE_PUT;
- };
+ dcp->c_flag &= ~C_DIR_MODIFICATION;
+ wakeup((caddr_t)&dcp->c_flag);
return (error);
}
__private_extern__ void
replace_desc(struct cnode *cp, struct cat_desc *cdp)
{
+ // fixes 4348457 and 4463138
if (&cp->c_desc == cdp) {
- return;
+ return;
}
/* First release allocated name buffer */
if (cp->c_desc.cd_flags & CD_HASBUF && cp->c_desc.cd_nameptr != 0) {
- char *name = cp->c_desc.cd_nameptr;
+ const u_int8_t *name = cp->c_desc.cd_nameptr;
cp->c_desc.cd_nameptr = 0;
cp->c_desc.cd_namelen = 0;
cp->c_desc.cd_flags &= ~CD_HASBUF;
- vfs_removename(name);
+ vfs_removename((const char *)name);
}
bcopy(cdp, &cp->c_desc, sizeof(cp->c_desc));
* - all the vnodes are from the same file system
*
* When the target is a directory, HFS must ensure that its empty.
+ *
+ * Note that this function requires up to 6 vnodes in order to work properly
+ * if it is operating on files (and not on directories). This is because only
+ * files can have resource forks, and we now require iocounts to be held on the
+ * vnodes corresponding to the resource forks (if applicable) as well as
+ * the files or directories undergoing rename. The problem with not holding
+ * iocounts on the resource fork vnodes is that it can lead to a deadlock
+ * situation: The rsrc fork of the source file may be recycled and reclaimed
+ * in order to provide a vnode for the destination file's rsrc fork. Since
+ * data and rsrc forks share the same cnode, we'd eventually try to lock the
+ * source file's cnode in order to sync its rsrc fork to disk, but it's already
+ * been locked. By taking the rsrc fork vnodes up front we ensure that they
+ * cannot be recycled, and that the situation mentioned above cannot happen.
*/
-static int
+int
hfs_vnop_rename(ap)
struct vnop_rename_args /* {
struct vnode *a_fdvp;
struct vnode *tdvp = ap->a_tdvp;
struct vnode *fvp = ap->a_fvp;
struct vnode *fdvp = ap->a_fdvp;
+ /*
+ * Note that we only need locals for the target/destination's
+ * resource fork vnode (and only if necessary). We don't care if the
+ * source has a resource fork vnode or not.
+ */
+ struct vnode *tvp_rsrc = NULLVP;
+ uint32_t tvp_rsrc_vid = 0;
struct componentname *tcnp = ap->a_tcnp;
struct componentname *fcnp = ap->a_fcnp;
struct proc *p = vfs_context_proc(ap->a_context);
struct cnode *fdcp;
struct cnode *tdcp;
struct cnode *tcp;
+ struct cnode *error_cnode;
struct cat_desc from_desc;
struct cat_desc to_desc;
struct cat_desc out_desc;
int took_trunc_lock = 0;
int lockflags;
int error;
+ time_t orig_from_ctime, orig_to_ctime;
+ int emit_rename = 1;
+ int emit_delete = 1;
+ int is_tracked = 0;
+ int unlocked;
+
+ orig_from_ctime = VTOC(fvp)->c_ctime;
+ if (tvp && VTOC(tvp)) {
+ orig_to_ctime = VTOC(tvp)->c_ctime;
+ } else {
+ orig_to_ctime = ~0;
+ }
+
+ hfsmp = VTOHFS(tdvp);
+ /*
+ * Do special case checks here. If fvp == tvp then we need to check the
+ * cnode with locks held.
+ */
+ if (fvp == tvp) {
+ int is_hardlink = 0;
+ /*
+ * In this case, we do *NOT* ever emit a DELETE event.
+ * We may not necessarily emit a RENAME event
+ */
+ emit_delete = 0;
+ if ((error = hfs_lock(VTOC(fvp), HFS_SHARED_LOCK, HFS_LOCK_DEFAULT))) {
+ return error;
+ }
+ /* Check to see if the item is a hardlink or not */
+ is_hardlink = (VTOC(fvp)->c_flag & C_HARDLINK);
+ hfs_unlock (VTOC(fvp));
+
+ /*
+ * If the item is not a hardlink, then case sensitivity must be off, otherwise
+ * two names should not resolve to the same cnode unless they were case variants.
+ */
+ if (is_hardlink) {
+ emit_rename = 0;
+ /*
+ * Hardlinks are a little trickier. We only want to emit a rename event
+ * if the item is a hardlink, the parent directories are the same, case sensitivity
+ * is off, and the case folded names are the same. See the fvp == tvp case below for more
+ * info.
+ */
+
+ if ((fdvp == tdvp) && ((hfsmp->hfs_flags & HFS_CASE_SENSITIVE) == 0)) {
+ if (hfs_namecmp((const u_int8_t *)fcnp->cn_nameptr, fcnp->cn_namelen,
+ (const u_int8_t *)tcnp->cn_nameptr, tcnp->cn_namelen) == 0) {
+ /* Then in this case only it is ok to emit a rename */
+ emit_rename = 1;
+ }
+ }
+ }
+ }
+ if (emit_rename) {
+ /* c_bsdflags should only be assessed while holding the cnode lock.
+ * This is not done consistently throughout the code and can result
+ * in race. This will be fixed via rdar://12181064
+ */
+ if (VTOC(fvp)->c_bsdflags & UF_TRACKED) {
+ is_tracked = 1;
+ }
+ check_for_tracked_file(fvp, orig_from_ctime, NAMESPACE_HANDLER_RENAME_OP, NULL);
+ }
+
+ if (tvp && VTOC(tvp)) {
+ if (emit_delete) {
+ check_for_tracked_file(tvp, orig_to_ctime, NAMESPACE_HANDLER_DELETE_OP, NULL);
+ }
+ }
- /* When tvp exist, take the truncate lock for the hfs_removefile(). */
- if (tvp && vnode_isreg(tvp)) {
- hfs_lock_truncate(VTOC(tvp), TRUE);
+retry:
+ /* When tvp exists, take the truncate lock for hfs_removefile(). */
+ if (tvp && (vnode_isreg(tvp) || vnode_islnk(tvp))) {
+ hfs_lock_truncate(VTOC(tvp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
took_trunc_lock = 1;
}
+relock:
error = hfs_lockfour(VTOC(fdvp), VTOC(fvp), VTOC(tdvp), tvp ? VTOC(tvp) : NULL,
- HFS_EXCLUSIVE_LOCK);
+ HFS_EXCLUSIVE_LOCK, &error_cnode);
if (error) {
- if (took_trunc_lock)
- hfs_unlock_truncate(VTOC(tvp));
+ if (took_trunc_lock) {
+ hfs_unlock_truncate(VTOC(tvp), HFS_LOCK_DEFAULT);
+ took_trunc_lock = 0;
+ }
+
+ /*
+ * We hit an error path. If we were trying to re-acquire the locks
+ * after coming through here once, we might have already obtained
+ * an iocount on tvp's resource fork vnode. Drop that before dealing
+ * with the failure. Note this is safe -- since we are in an
+ * error handling path, we can't be holding the cnode locks.
+ */
+ if (tvp_rsrc) {
+ vnode_put (tvp_rsrc);
+ tvp_rsrc_vid = 0;
+ tvp_rsrc = NULL;
+ }
+
+ /*
+ * tvp might no longer exist. If the cause of the lock failure
+ * was tvp, then we can try again with tvp/tcp set to NULL.
+ * This is ok because the vfs syscall will vnode_put the vnodes
+ * after we return from hfs_vnop_rename.
+ */
+ if ((error == ENOENT) && (tvp != NULL) && (error_cnode == VTOC(tvp))) {
+ tcp = NULL;
+ tvp = NULL;
+ goto retry;
+ }
+
+ /* If we want to reintroduce notifications for failed renames, this
+ is the place to do it. */
+
return (error);
}
fcp = VTOC(fvp);
tdcp = VTOC(tdvp);
tcp = tvp ? VTOC(tvp) : NULL;
- hfsmp = VTOHFS(tdvp);
- /* Check for a race against unlink. */
- if (fcp->c_flag & C_NOEXISTS) {
+ //
+ // if the item is tracked but doesn't have a document_id, assign one and generate an fsevent for it
+ //
+ unlocked = 0;
+ if ((fcp->c_bsdflags & UF_TRACKED) && ((struct FndrExtendedDirInfo *)((char *)&fcp->c_attr.ca_finderinfo + 16))->document_id == 0) {
+ uint32_t newid;
+
+ hfs_unlockfour(VTOC(fdvp), VTOC(fvp), VTOC(tdvp), tvp ? VTOC(tvp) : NULL);
+ unlocked = 1;
+
+ if (hfs_generate_document_id(hfsmp, &newid) == 0) {
+ hfs_lock(fcp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ ((struct FndrExtendedDirInfo *)((char *)&fcp->c_attr.ca_finderinfo + 16))->document_id = newid;
+#if CONFIG_FSE
+ add_fsevent(FSE_DOCID_CHANGED, vfs_context_current(),
+ FSE_ARG_DEV, hfsmp->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)0, // src inode #
+ FSE_ARG_INO, (ino64_t)fcp->c_fileid, // dst inode #
+ FSE_ARG_INT32, newid,
+ FSE_ARG_DONE);
+#endif
+ hfs_unlock(fcp);
+ } else {
+ // XXXdbg - couldn't get a new docid... what to do? can't really fail the rename...
+ }
+
+ //
+ // check if we're going to need to fix tcp as well. if we aren't, go back relock
+ // everything. otherwise continue on and fix up tcp as well before relocking.
+ //
+ if (tcp == NULL || !(tcp->c_bsdflags & UF_TRACKED) || ((struct FndrExtendedDirInfo *)((char *)&tcp->c_attr.ca_finderinfo + 16))->document_id != 0) {
+ goto relock;
+ }
+ }
+
+ //
+ // same thing for tcp if it's set
+ //
+ if (tcp && (tcp->c_bsdflags & UF_TRACKED) && ((struct FndrExtendedDirInfo *)((char *)&tcp->c_attr.ca_finderinfo + 16))->document_id == 0) {
+ uint32_t newid;
+
+ if (!unlocked) {
+ hfs_unlockfour(VTOC(fdvp), VTOC(fvp), VTOC(tdvp), tvp ? VTOC(tvp) : NULL);
+ unlocked = 1;
+ }
+
+ if (hfs_generate_document_id(hfsmp, &newid) == 0) {
+ hfs_lock(tcp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ ((struct FndrExtendedDirInfo *)((char *)&tcp->c_attr.ca_finderinfo + 16))->document_id = newid;
+#if CONFIG_FSE
+ add_fsevent(FSE_DOCID_CHANGED, vfs_context_current(),
+ FSE_ARG_DEV, hfsmp->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)0, // src inode #
+ FSE_ARG_INO, (ino64_t)tcp->c_fileid, // dst inode #
+ FSE_ARG_INT32, newid,
+ FSE_ARG_DONE);
+#endif
+ hfs_unlock(tcp);
+ } else {
+ // XXXdbg - couldn't get a new docid... what to do? can't really fail the rename...
+ }
+
+ // go back up and relock everything. next time through the if statement won't be true
+ // and we'll skip over this block of code.
+ goto relock;
+ }
+
+
+
+ /*
+ * Acquire iocounts on the destination's resource fork vnode
+ * if necessary. If dst/src are files and the dst has a resource
+ * fork vnode, then we need to try and acquire an iocount on the rsrc vnode.
+ * If it does not exist, then we don't care and can skip it.
+ */
+ if ((vnode_isreg(fvp)) || (vnode_islnk(fvp))) {
+ if ((tvp) && (tcp->c_rsrc_vp) && (tvp_rsrc == NULL)) {
+ tvp_rsrc = tcp->c_rsrc_vp;
+ /*
+ * We can look at the vid here because we're holding the
+ * cnode lock on the underlying cnode for this rsrc vnode.
+ */
+ tvp_rsrc_vid = vnode_vid (tvp_rsrc);
+
+ /* Unlock everything to acquire iocount on this rsrc vnode */
+ if (took_trunc_lock) {
+ hfs_unlock_truncate (VTOC(tvp), HFS_LOCK_DEFAULT);
+ took_trunc_lock = 0;
+ }
+ hfs_unlockfour(fdcp, fcp, tdcp, tcp);
+
+ if (vnode_getwithvid (tvp_rsrc, tvp_rsrc_vid)) {
+ /* iocount acquisition failed. Reset fields and start over.. */
+ tvp_rsrc_vid = 0;
+ tvp_rsrc = NULL;
+ }
+ goto retry;
+ }
+ }
+
+
+
+ /* Ensure we didn't race src or dst parent directories with rmdir. */
+ if (fdcp->c_flag & (C_NOEXISTS | C_DELETED)) {
+ error = ENOENT;
+ goto out;
+ }
+
+ if (tdcp->c_flag & (C_NOEXISTS | C_DELETED)) {
+ error = ENOENT;
+ goto out;
+ }
+
+
+ /* Check for a race against unlink. The hfs_valid_cnode checks validate
+ * the parent/child relationship with fdcp and tdcp, as well as the
+ * component name of the target cnodes.
+ */
+ if ((fcp->c_flag & (C_NOEXISTS | C_DELETED)) || !hfs_valid_cnode(hfsmp, fdvp, fcnp, fcp->c_fileid, NULL, &error)) {
error = ENOENT;
goto out;
}
+ if (tcp && ((tcp->c_flag & (C_NOEXISTS | C_DELETED)) || !hfs_valid_cnode(hfsmp, tdvp, tcnp, tcp->c_fileid, NULL, &error))) {
+ //
+ // hmm, the destination vnode isn't valid any more.
+ // in this case we can just drop him and pretend he
+ // never existed in the first place.
+ //
+ if (took_trunc_lock) {
+ hfs_unlock_truncate(VTOC(tvp), HFS_LOCK_DEFAULT);
+ took_trunc_lock = 0;
+ }
+ error = 0;
+
+ hfs_unlockfour(fdcp, fcp, tdcp, tcp);
+
+ tcp = NULL;
+ tvp = NULL;
+
+ // retry the locking with tvp null'ed out
+ goto retry;
+ }
+
+ fdcp->c_flag |= C_DIR_MODIFICATION;
+ if (fdvp != tdvp) {
+ tdcp->c_flag |= C_DIR_MODIFICATION;
+ }
+
+ /*
+ * Disallow renaming of a directory hard link if the source and
+ * destination parent directories are different, or a directory whose
+ * descendant is a directory hard link and the one of the ancestors
+ * of the destination directory is a directory hard link.
+ */
+ if (vnode_isdir(fvp) && (fdvp != tdvp)) {
+ if (fcp->c_flag & C_HARDLINK) {
+ error = EPERM;
+ goto out;
+ }
+ if (fcp->c_attr.ca_recflags & kHFSHasChildLinkMask) {
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
+ if (cat_check_link_ancestry(hfsmp, tdcp->c_fileid, 0)) {
+ error = EPERM;
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ goto out;
+ }
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ }
+ }
+
/*
* The following edge case is caught here:
* (to cannot be a descendent of from)
* /
* o tvp
*/
- if (tdcp->c_parentcnid == fcp->c_cnid) {
+ if (tdcp->c_parentcnid == fcp->c_fileid) {
error = EINVAL;
goto out;
}
/*
* Make sure "from" vnode and its parent are changeable.
*/
- if ((fcp->c_flags & (IMMUTABLE | APPEND)) || (fdcp->c_flags & APPEND)) {
+ if ((fcp->c_bsdflags & (IMMUTABLE | APPEND)) || (fdcp->c_bsdflags & APPEND)) {
error = EPERM;
goto out;
}
goto out;
}
+ /* Don't allow modification of the journal or journal_info_block */
+ if (hfs_is_journal_file(hfsmp, fcp) ||
+ (tcp && hfs_is_journal_file(hfsmp, tcp))) {
+ error = EPERM;
+ goto out;
+ }
+
#if QUOTA
if (tvp)
(void)hfs_getinoquota(tcp);
/* Preflighting done, take fvp out of the name space. */
cache_purge(fvp);
+#if CONFIG_SECLUDED_RENAME
/*
- * When a file moves out of "Cleanup At Startup"
- * we can drop its NODUMP status.
+ * Check for "secure" rename that imposes additional restrictions on the
+ * source vnode. We wait until here to check in order to prevent a race
+ * with other threads that manage to look up fvp, but their open or link
+ * is blocked by our locks. At this point, with fvp out of the name cache,
+ * and holding the lock on fdvp, no other thread can find fvp.
+ *
+ * TODO: Do we need to limit these checks to regular files only?
*/
- if ((fcp->c_flags & UF_NODUMP) &&
- vnode_isreg(fvp) &&
- (fdvp != tdvp) &&
- (fdcp->c_desc.cd_nameptr != NULL) &&
- (strcmp(fdcp->c_desc.cd_nameptr, CARBON_TEMP_DIR_NAME) == 0)) {
- fcp->c_flags &= ~UF_NODUMP;
- fcp->c_touch_chgtime = TRUE;
- (void) hfs_update(fvp, 0);
- }
+ if (fcnp->cn_flags & CN_SECLUDE_RENAME) {
+ if (vnode_isdir(fvp)) {
+ error = EISDIR;
+ goto out;
+ }
+
+ /*
+ * Neither fork of source may be open or memory mapped.
+ * We also don't want it in use by any other system call.
+ * The file must not have hard links.
+ *
+ * We can't simply use vnode_isinuse() because that does not
+ * count opens with O_EVTONLY. We don't want a malicious
+ * process using O_EVTONLY to subvert a secluded rename.
+ */
+ if (fcp->c_linkcount != 1) {
+ error = EMLINK;
+ goto out;
+ }
+ if (fcp->c_rsrc_vp && (fcp->c_rsrc_vp->v_usecount > 0 ||
+ fcp->c_rsrc_vp->v_iocount > 0)) {
+ /* Resource fork is in use (including O_EVTONLY) */
+ error = EBUSY;
+ goto out;
+ }
+ if (fcp->c_vp && (fcp->c_vp->v_usecount > (fcp->c_rsrc_vp ? 1 : 0) ||
+ fcp->c_vp->v_iocount > 1)) {
+ /*
+ * Data fork is in use, including O_EVTONLY, but not
+ * including a reference from the resource fork.
+ */
+ error = EBUSY;
+ goto out;
+ }
+ }
+#endif
+
bzero(&from_desc, sizeof(from_desc));
- from_desc.cd_nameptr = fcnp->cn_nameptr;
+ from_desc.cd_nameptr = (const u_int8_t *)fcnp->cn_nameptr;
from_desc.cd_namelen = fcnp->cn_namelen;
- from_desc.cd_parentcnid = fdcp->c_cnid;
+ from_desc.cd_parentcnid = fdcp->c_fileid;
from_desc.cd_flags = fcp->c_desc.cd_flags & ~(CD_HASBUF | CD_DECOMPOSED);
from_desc.cd_cnid = fcp->c_cnid;
bzero(&to_desc, sizeof(to_desc));
- to_desc.cd_nameptr = tcnp->cn_nameptr;
+ to_desc.cd_nameptr = (const u_int8_t *)tcnp->cn_nameptr;
to_desc.cd_namelen = tcnp->cn_namelen;
- to_desc.cd_parentcnid = tdcp->c_cnid;
+ to_desc.cd_parentcnid = tdcp->c_fileid;
to_desc.cd_flags = fcp->c_desc.cd_flags & ~(CD_HASBUF | CD_DECOMPOSED);
to_desc.cd_cnid = fcp->c_cnid;
}
started_tr = 1;
+ /* hfs_vnop_link() and hfs_vnop_rename() set kHFSHasChildLinkMask
+ * inside a journal transaction and without holding a cnode lock.
+ * As setting of this bit depends on being in journal transaction for
+ * concurrency, check this bit again after we start journal transaction for rename
+ * to ensure that this directory does not have any descendant that
+ * is a directory hard link.
+ */
+ if (vnode_isdir(fvp) && (fdvp != tdvp)) {
+ if (fcp->c_attr.ca_recflags & kHFSHasChildLinkMask) {
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
+ if (cat_check_link_ancestry(hfsmp, tdcp->c_fileid, 0)) {
+ error = EPERM;
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ goto out;
+ }
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ }
+ }
+
// if it's a hardlink then re-lookup the name so
// that we get the correct cnid in from_desc (see
// the comment in hfs_removefile for more details)
struct cat_desc tmpdesc;
cnid_t real_cnid;
- bzero(&tmpdesc, sizeof(tmpdesc));
- tmpdesc.cd_nameptr = fcnp->cn_nameptr;
+ tmpdesc.cd_nameptr = (const u_int8_t *)fcnp->cn_nameptr;
tmpdesc.cd_namelen = fcnp->cn_namelen;
- tmpdesc.cd_parentcnid = fdcp->c_cnid;
+ tmpdesc.cd_parentcnid = fdcp->c_fileid;
tmpdesc.cd_hint = fdcp->c_childhint;
+ tmpdesc.cd_flags = fcp->c_desc.cd_flags & CD_ISDIR;
+ tmpdesc.cd_encoding = 0;
lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
- if (cat_lookup(hfsmp, &tmpdesc, 0, NULL, NULL, NULL, &real_cnid) != 0) {
+ if (cat_lookup(hfsmp, &tmpdesc, 0, 0, NULL, NULL, NULL, &real_cnid) != 0) {
hfs_systemfile_unlock(hfsmp, lockflags);
goto out;
}
/*
* Reserve some space in the Catalog file.
*/
- bzero(&cookie, sizeof(cookie));
if ((error = cat_preflight(hfsmp, CAT_RENAME + CAT_DELETE, &cookie, p))) {
goto out;
}
got_cookie = 1;
/*
- * If the destination exists then it may need to be removed.
+ * If the destination exists then it may need to be removed.
+ *
+ * Due to HFS's locking system, we should always move the
+ * existing 'tvp' element to the hidden directory in hfs_vnop_rename.
+ * Because the VNOP_LOOKUP call enters and exits the filesystem independently
+ * of the actual vnop that it was trying to do (stat, link, readlink),
+ * we must release the cnode lock of that element during the interim to
+ * do MAC checking, vnode authorization, and other calls. In that time,
+ * the item can be deleted (or renamed over). However, only in the rename
+ * case is it inappropriate to return ENOENT from any of those calls. Either
+ * the call should return information about the old element (stale), or get
+ * information about the newer element that we are about to write in its place.
+ *
+ * HFS lookup has been modified to detect a rename and re-drive its
+ * lookup internally. For other calls that have already succeeded in
+ * their lookup call and are waiting to acquire the cnode lock in order
+ * to proceed, that cnode lock will not fail due to the cnode being marked
+ * C_NOEXISTS, because it won't have been marked as such. It will only
+ * have C_DELETED. Thus, they will simply act on the stale open-unlinked
+ * element. All future callers will get the new element.
+ *
+ * To implement this behavior, we pass the "only_unlink" argument to
+ * hfs_removefile and hfs_removedir. This will result in the vnode acting
+ * as though it is open-unlinked. Additionally, when we are done moving the
+ * element to the hidden directory, we vnode_recycle the target so that it is
+ * reclaimed as soon as possible. Reclaim and inactive are both
+ * capable of clearing out unused blocks for an open-unlinked file or dir.
*/
if (tvp) {
+ //
+ // if the destination has a document id, we need to preserve it
+ //
+ if (fvp != tvp) {
+ uint32_t document_id;
+ struct FndrExtendedDirInfo *ffip = (struct FndrExtendedDirInfo *)((char *)&fcp->c_attr.ca_finderinfo + 16);
+ struct FndrExtendedDirInfo *tfip = (struct FndrExtendedDirInfo *)((char *)&tcp->c_attr.ca_finderinfo + 16);
+
+ if (ffip->document_id && tfip->document_id) {
+ // both documents are tracked. only save a tombstone from tcp and do nothing else.
+ save_tombstone(hfsmp, tdvp, tvp, tcnp, 0);
+ } else {
+ struct doc_tombstone *ut;
+ ut = get_uthread_doc_tombstone();
+
+ document_id = tfip->document_id;
+ tfip->document_id = 0;
+
+ if (document_id != 0) {
+ // clear UF_TRACKED as well since tcp is now no longer tracked
+ tcp->c_bsdflags &= ~UF_TRACKED;
+ (void) cat_update(hfsmp, &tcp->c_desc, &tcp->c_attr, NULL, NULL);
+ }
+
+ if (ffip->document_id == 0 && document_id != 0) {
+ // printf("RENAME: preserving doc-id %d onto %s (from ino %d, to ino %d)\n", document_id, tcp->c_desc.cd_nameptr, tcp->c_desc.cd_cnid, fcp->c_desc.cd_cnid);
+ fcp->c_bsdflags |= UF_TRACKED;
+ ffip->document_id = document_id;
+
+ (void) cat_update(hfsmp, &fcp->c_desc, &fcp->c_attr, NULL, NULL);
+#if CONFIG_FSE
+ add_fsevent(FSE_DOCID_CHANGED, vfs_context_current(),
+ FSE_ARG_DEV, hfsmp->hfs_raw_dev,
+ FSE_ARG_INO, (ino64_t)tcp->c_fileid, // src inode #
+ FSE_ARG_INO, (ino64_t)fcp->c_fileid, // dst inode #
+ FSE_ARG_INT32, (uint32_t)ffip->document_id,
+ FSE_ARG_DONE);
+#endif
+ } else if ((fcp->c_bsdflags & UF_TRACKED) && should_save_docid_tombstone(ut, fvp, fcnp)) {
+
+ if (ut->t_lastop_document_id) {
+ clear_tombstone_docid(ut, hfsmp, NULL);
+ }
+ save_tombstone(hfsmp, fdvp, fvp, fcnp, 0);
+
+ //printf("RENAME: (dest-exists): saving tombstone doc-id %lld @ %s (ino %d)\n",
+ // ut->t_lastop_document_id, ut->t_lastop_filename, fcp->c_desc.cd_cnid);
+ }
+ }
+ }
+
/*
- * When fvp matches tvp they must be case variants
- * or hard links.
+ * When fvp matches tvp they could be case variants
+ * or matching hard links.
*/
if (fvp == tvp) {
- /*
- * If this a hard link with different parents
- * and its not a case variant then tvp should
- * be removed.
- */
- if (!((fcp->c_flag & C_HARDLINK) &&
- ((fdvp != tdvp) ||
- (hfs_namecmp(fcnp->cn_nameptr, fcnp->cn_namelen,
- tcnp->cn_nameptr, tcnp->cn_namelen) != 0)))) {
- goto skip;
+ if (!(fcp->c_flag & C_HARDLINK)) {
+ /*
+ * If they're not hardlinks, then fvp == tvp must mean we
+ * are using case-insensitive HFS because case-sensitive would
+ * not use the same vnode for both. In this case we just update
+ * the catalog for: a -> A
+ */
+ goto skip_rm; /* simple case variant */
+
+ }
+ /* For all cases below, we must be using hardlinks */
+ else if ((fdvp != tdvp) ||
+ (hfsmp->hfs_flags & HFS_CASE_SENSITIVE)) {
+ /*
+ * If the parent directories are not the same, AND the two items
+ * are hardlinks, posix says to do nothing:
+ * dir1/fred <-> dir2/bob and the op was mv dir1/fred -> dir2/bob
+ * We just return 0 in this case.
+ *
+ * If case sensitivity is on, and we are using hardlinks
+ * then renaming is supposed to do nothing.
+ * dir1/fred <-> dir2/FRED, and op == mv dir1/fred -> dir2/FRED
+ */
+ goto out; /* matching hardlinks, nothing to do */
+
+ } else if (hfs_namecmp((const u_int8_t *)fcnp->cn_nameptr, fcnp->cn_namelen,
+ (const u_int8_t *)tcnp->cn_nameptr, tcnp->cn_namelen) == 0) {
+ /*
+ * If we get here, then the following must be true:
+ * a) We are running case-insensitive HFS+.
+ * b) Both paths 'fvp' and 'tvp' are in the same parent directory.
+ * c) the two names are case-variants of each other.
+ *
+ * In this case, we are really only dealing with a single catalog record
+ * whose name is being updated.
+ *
+ * op is dir1/fred -> dir1/FRED
+ *
+ * We need to special case the name matching, because if
+ * dir1/fred <-> dir1/bob were the two links, and the
+ * op was dir1/fred -> dir1/bob
+ * That would fail/do nothing.
+ */
+ goto skip_rm; /* case-variant hardlink in the same dir */
+ } else {
+ goto out; /* matching hardlink, nothing to do */
}
- } else {
- cache_purge(tvp);
}
- if (vnode_isdir(tvp))
- error = hfs_removedir(tdvp, tvp, tcnp, HFSRM_SKIP_RESERVE);
+
+ if (vnode_isdir(tvp)) {
+ /*
+ * hfs_removedir will eventually call hfs_removefile on the directory
+ * we're working on, because only hfs_removefile does the renaming of the
+ * item to the hidden directory. The directory will stay around in the
+ * hidden directory with C_DELETED until it gets an inactive or a reclaim.
+ * That way, we can destroy all of the EAs as needed and allow new ones to be
+ * written.
+ */
+ error = hfs_removedir(tdvp, tvp, tcnp, HFSRM_SKIP_RESERVE, 1);
+ }
else {
- error = hfs_removefile(tdvp, tvp, tcnp, 0, HFSRM_SKIP_RESERVE);
+ error = hfs_removefile(tdvp, tvp, tcnp, 0, HFSRM_SKIP_RESERVE, 0, NULL, 1);
+
+ /*
+ * If the destination file had a resource fork vnode, then we need to get rid of
+ * its blocks when there are no more references to it. Because the call to
+ * hfs_removefile above always open-unlinks things, we need to force an inactive/reclaim
+ * on the resource fork vnode, in order to prevent block leaks. Otherwise,
+ * the resource fork vnode could prevent the data fork vnode from going out of scope
+ * because it holds a v_parent reference on it. So we mark it for termination
+ * with a call to vnode_recycle. hfs_vnop_reclaim has been modified so that it
+ * can clean up the blocks of open-unlinked files and resource forks.
+ *
+ * We can safely call vnode_recycle on the resource fork because we took an iocount
+ * reference on it at the beginning of the function.
+ */
+
+ if ((error == 0) && (tcp->c_flag & C_DELETED) && (tvp_rsrc)) {
+ vnode_recycle(tvp_rsrc);
+ }
}
- if (error)
+ if (error) {
goto out;
+ }
+
tvp_deleted = 1;
+
+ /* Mark 'tcp' as being deleted due to a rename */
+ tcp->c_flag |= C_RENAMED;
+
+ /*
+ * Aggressively mark tvp/tcp for termination to ensure that we recover all blocks
+ * as quickly as possible.
+ */
+ vnode_recycle(tvp);
+ } else {
+ struct doc_tombstone *ut;
+ ut = get_uthread_doc_tombstone();
+
+ //
+ // There is nothing at the destination. If the file being renamed is
+ // tracked, save a "tombstone" of the document_id. If the file is
+ // not a tracked file, then see if it needs to inherit a tombstone.
+ //
+ // NOTE: we do not save a tombstone if the file being renamed begins
+ // with "atmp" which is done to work-around AutoCad's bizarre
+ // 5-step un-safe save behavior
+ //
+ if (fcp->c_bsdflags & UF_TRACKED) {
+ if (should_save_docid_tombstone(ut, fvp, fcnp)) {
+ save_tombstone(hfsmp, fdvp, fvp, fcnp, 0);
+
+ //printf("RENAME: (no dest): saving tombstone doc-id %lld @ %s (ino %d)\n",
+ // ut->t_lastop_document_id, ut->t_lastop_filename, fcp->c_desc.cd_cnid);
+ } else {
+ // intentionally do nothing
+ }
+ } else if ( ut->t_lastop_document_id != 0
+ && tdvp == ut->t_lastop_parent
+ && vnode_vid(tdvp) == ut->t_lastop_parent_vid
+ && strcmp((char *)ut->t_lastop_filename, (char *)tcnp->cn_nameptr) == 0) {
+
+ //printf("RENAME: %s (ino %d) inheriting doc-id %lld\n", tcnp->cn_nameptr, fcp->c_desc.cd_cnid, ut->t_lastop_document_id);
+ struct FndrExtendedFileInfo *fip = (struct FndrExtendedFileInfo *)((char *)&fcp->c_attr.ca_finderinfo + 16);
+ fcp->c_bsdflags |= UF_TRACKED;
+ fip->document_id = ut->t_lastop_document_id;
+ cat_update(hfsmp, &fcp->c_desc, &fcp->c_attr, NULL, NULL);
+
+ clear_tombstone_docid(ut, hfsmp, fcp); // will send the docid-changed fsevent
+
+ } else if (ut->t_lastop_document_id && should_save_docid_tombstone(ut, fvp, fcnp) && should_save_docid_tombstone(ut, tvp, tcnp)) {
+ // no match, clear the tombstone
+ //printf("RENAME: clearing the tombstone %lld @ %s\n", ut->t_lastop_document_id, ut->t_lastop_filename);
+ clear_tombstone_docid(ut, hfsmp, NULL);
+ }
+
}
-skip:
+skip_rm:
/*
- * All done with tvp and fvp
+ * All done with tvp and fvp.
+ *
+ * We also jump to this point if there was no destination observed during lookup and namei.
+ * However, because only iocounts are held at the VFS layer, there is nothing preventing a
+ * competing thread from racing us and creating a file or dir at the destination of this rename
+ * operation. If this occurs, it may cause us to get a spurious EEXIST out of the cat_rename
+ * call below. To preserve rename's atomicity, we need to signal VFS to re-drive the
+ * namei/lookup and restart the rename operation. EEXIST is an allowable errno to be bubbled
+ * out of the rename syscall, but not for this reason, since it is a synonym errno for ENOTEMPTY.
+ * To signal VFS, we return ERECYCLE (which is also used for lookup restarts). This errno
+ * will be swallowed and it will restart the operation.
*/
-
+
lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
error = cat_rename(hfsmp, &from_desc, &tdcp->c_desc, &to_desc, &out_desc);
hfs_systemfile_unlock(hfsmp, lockflags);
if (error) {
+ if (error == EEXIST) {
+ error = ERECYCLE;
+ }
goto out;
}
/* Invalidate negative cache entries in the destination directory */
- if (hfsmp->hfs_flags & HFS_CASE_SENSITIVE)
+ if (tdcp->c_flag & C_NEG_ENTRIES) {
cache_purge_negatives(tdvp);
+ tdcp->c_flag &= ~C_NEG_ENTRIES;
+ }
/* Update cnode's catalog descriptor */
replace_desc(fcp, &out_desc);
- fcp->c_parentcnid = tdcp->c_cnid;
+ fcp->c_parentcnid = tdcp->c_fileid;
fcp->c_hint = 0;
+ /* Now indicate this cnode needs to have date-added written to the finderinfo */
+ fcp->c_flag |= C_NEEDS_DATEADDED;
+ (void) hfs_update (fvp, 0);
+
+
hfs_volupdate(hfsmp, vnode_isdir(fvp) ? VOL_RMDIR : VOL_RMFILE,
(fdcp->c_cnid == kHFSRootFolderID));
hfs_volupdate(hfsmp, vnode_isdir(fvp) ? VOL_MKDIR : VOL_MKFILE,
/* Update both parent directories. */
if (fdvp != tdvp) {
- tdcp->c_nlink++;
+ if (vnode_isdir(fvp)) {
+ /* If the source directory has directory hard link
+ * descendants, set the kHFSHasChildLinkBit in the
+ * destination parent hierarchy
+ */
+ if ((fcp->c_attr.ca_recflags & kHFSHasChildLinkMask) &&
+ !(tdcp->c_attr.ca_recflags & kHFSHasChildLinkMask)) {
+
+ tdcp->c_attr.ca_recflags |= kHFSHasChildLinkMask;
+
+ error = cat_set_childlinkbit(hfsmp, tdcp->c_parentcnid);
+ if (error) {
+ printf ("hfs_vnop_rename: error updating parent chain for %u\n", tdcp->c_cnid);
+ error = 0;
+ }
+ }
+ INC_FOLDERCOUNT(hfsmp, tdcp->c_attr);
+ DEC_FOLDERCOUNT(hfsmp, fdcp->c_attr);
+ }
tdcp->c_entries++;
- if (fdcp->c_nlink > 0)
- fdcp->c_nlink--;
+ tdcp->c_dirchangecnt++;
+ tdcp->c_flag |= C_MODIFIED;
+ hfs_incr_gencount(tdcp);
+
if (fdcp->c_entries > 0)
fdcp->c_entries--;
+ fdcp->c_dirchangecnt++;
+ fdcp->c_flag |= C_MODIFIED;
fdcp->c_touch_chgtime = TRUE;
fdcp->c_touch_modtime = TRUE;
- fdcp->c_flag |= C_FORCEUPDATE; // XXXdbg - force it out!
+ if (ISSET(fcp->c_flag, C_HARDLINK)) {
+ hfs_relorigin(fcp, fdcp->c_fileid);
+ if (fdcp->c_fileid != fdcp->c_cnid)
+ hfs_relorigin(fcp, fdcp->c_cnid);
+ }
+
(void) hfs_update(fdvp, 0);
}
+ hfs_incr_gencount(fdcp);
+
tdcp->c_childhint = out_desc.cd_hint; /* Cache directory's location */
tdcp->c_touch_chgtime = TRUE;
tdcp->c_touch_modtime = TRUE;
- tdcp->c_flag |= C_FORCEUPDATE; // XXXdbg - force it out!
(void) hfs_update(tdvp, 0);
+
+ /* Update the vnode's name now that the rename has completed. */
+ vnode_update_identity(fvp, tdvp, tcnp->cn_nameptr, tcnp->cn_namelen,
+ tcnp->cn_hash, (VNODE_UPDATE_PARENT | VNODE_UPDATE_NAME));
+
+ /*
+ * At this point, we may have a resource fork vnode attached to the
+ * 'from' vnode. If it exists, we will want to update its name, because
+ * it contains the old name + _PATH_RSRCFORKSPEC. ("/..namedfork/rsrc").
+ *
+ * Note that the only thing we need to update here is the name attached to
+ * the vnode, since a resource fork vnode does not have a separate resource
+ * cnode -- it's still 'fcp'.
+ */
+ if (fcp->c_rsrc_vp) {
+ char* rsrc_path = NULL;
+ int len;
+
+ /* Create a new temporary buffer that's going to hold the new name */
+ MALLOC_ZONE (rsrc_path, caddr_t, MAXPATHLEN, M_NAMEI, M_WAITOK);
+ len = snprintf (rsrc_path, MAXPATHLEN, "%s%s", tcnp->cn_nameptr, _PATH_RSRCFORKSPEC);
+ len = MIN(len, MAXPATHLEN);
+
+ /*
+ * vnode_update_identity will do the following for us:
+ * 1) release reference on the existing rsrc vnode's name.
+ * 2) copy/insert new name into the name cache
+ * 3) attach the new name to the resource vnode
+ * 4) update the vnode's vid
+ */
+ vnode_update_identity (fcp->c_rsrc_vp, fvp, rsrc_path, len, 0, (VNODE_UPDATE_NAME | VNODE_UPDATE_CACHE));
+
+ /* Free the memory associated with the resource fork's name */
+ FREE_ZONE (rsrc_path, MAXPATHLEN, M_NAMEI);
+ }
out:
if (got_cookie) {
cat_postflight(hfsmp, &cookie, p);
hfs_end_transaction(hfsmp);
}
- /* Note that if hfs_removedir or hfs_removefile was invoked above they will already have
- generated a NOTE_WRITE for tdvp and a NOTE_DELETE for tvp.
- */
- if (error == 0) {
- HFS_KNOTE(fvp, NOTE_RENAME);
- HFS_KNOTE(fdvp, NOTE_WRITE);
- if (tdvp != fdvp) HFS_KNOTE(tdvp, NOTE_WRITE);
- };
-
- if (took_trunc_lock)
- hfs_unlock_truncate(VTOC(tvp));
+ fdcp->c_flag &= ~C_DIR_MODIFICATION;
+ wakeup((caddr_t)&fdcp->c_flag);
+ if (fdvp != tdvp) {
+ tdcp->c_flag &= ~C_DIR_MODIFICATION;
+ wakeup((caddr_t)&tdcp->c_flag);
+ }
hfs_unlockfour(fdcp, fcp, tdcp, tcp);
+ if (took_trunc_lock) {
+ hfs_unlock_truncate(VTOC(tvp), HFS_LOCK_DEFAULT);
+ }
+
+ /* Now vnode_put the resource forks vnodes if necessary */
+ if (tvp_rsrc) {
+ vnode_put(tvp_rsrc);
+ tvp_rsrc = NULL;
+ }
+
/* After tvp is removed the only acceptable error is EIO */
if (error && tvp_deleted)
error = EIO;
+ /* If we want to reintroduce notifications for renames, this is the
+ place to do it. */
+
return (error);
}
/*
* Make a directory.
*/
-static int
+int
hfs_vnop_mkdir(struct vnop_mkdir_args *ap)
{
/***** HACK ALERT ********/
/*
* Create a symbolic link.
*/
-static int
+int
hfs_vnop_symlink(struct vnop_symlink_args *ap)
{
struct vnode **vpp = ap->a_vpp;
struct vnode *dvp = ap->a_dvp;
struct vnode *vp = NULL;
+ struct cnode *cp = NULL;
struct hfsmount *hfsmp;
struct filefork *fp;
struct buf *bp = NULL;
char *datap;
int started_tr = 0;
- int len, error;
+ u_int32_t len;
+ int error;
/* HFS standard disks don't support symbolic links */
if (VTOVCB(dvp)->vcbSigWord != kHFSPlusSigWord)
if (ap->a_target[0] == 0)
return (EINVAL);
+ hfsmp = VTOHFS(dvp);
+ len = strlen(ap->a_target);
+
+ /* Check for free space */
+ if (((u_int64_t)hfs_freeblks(hfsmp, 0) * (u_int64_t)hfsmp->blockSize) < len) {
+ return (ENOSPC);
+ }
+
/* Create the vnode */
ap->a_vap->va_mode |= S_IFLNK;
if ((error = hfs_makenode(dvp, vpp, ap->a_cnp, ap->a_vap, ap->a_context))) {
goto out;
}
vp = *vpp;
- if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK)))
- return (error);
+ if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
+ goto out;
+ }
+ cp = VTOC(vp);
fp = VTOF(vp);
- hfsmp = VTOHFS(dvp);
- len = strlen(ap->a_target);
+
+ if (cp->c_flag & (C_NOEXISTS | C_DELETED)) {
+ goto out;
+ }
#if QUOTA
- (void)hfs_getinoquota(VTOC(vp));
+ (void)hfs_getinoquota(cp);
#endif /* QUOTA */
if ((error = hfs_start_transaction(hfsmp)) != 0) {
* Allocate space for the link.
*
* Since we're already inside a transaction,
- * tell hfs_truncate to skip the ubc_setsize.
*
* Don't need truncate lock since a symlink is treated as a system file.
*/
- error = hfs_truncate(vp, len, IO_NOZEROFILL, 1, ap->a_context);
- if (error)
- goto out; /* XXX need to remove link */
+ error = hfs_truncate(vp, len, IO_NOZEROFILL, 0, ap->a_context);
+
+ /* On errors, remove the symlink file */
+ if (error) {
+ /*
+ * End the transaction so we don't re-take the cnode lock
+ * below while inside a transaction (lock order violation).
+ */
+ hfs_end_transaction(hfsmp);
+
+ /* hfs_removefile() requires holding the truncate lock */
+ hfs_unlock(cp);
+ hfs_lock_truncate(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+ hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_ALLOW_NOEXISTS);
+
+ if (hfs_start_transaction(hfsmp) != 0) {
+ started_tr = 0;
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
+ goto out;
+ }
+
+ (void) hfs_removefile(dvp, vp, ap->a_cnp, 0, 0, 0, NULL, 0);
+ hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
+ goto out;
+ }
/* Write the link to disk */
- bp = buf_getblk(vp, (daddr64_t)0, roundup((int)fp->ff_size, VTOHFS(vp)->hfs_phys_block_size),
+ bp = buf_getblk(vp, (daddr64_t)0, roundup((int)fp->ff_size, hfsmp->hfs_physical_block_size),
0, 0, BLK_META);
if (hfsmp->jnl) {
journal_modify_block_start(hfsmp->jnl, bp);
bcopy(ap->a_target, datap, len);
if (hfsmp->jnl) {
- journal_modify_block_end(hfsmp->jnl, bp);
+ journal_modify_block_end(hfsmp->jnl, bp, NULL, NULL);
} else {
buf_bawrite(bp);
}
- /*
- * We defered the ubc_setsize for hfs_truncate
- * since we were inside a transaction.
- *
- * We don't need to drop the cnode lock here
- * since this is a symlink.
- */
- ubc_setsize(vp, len);
out:
if (started_tr)
hfs_end_transaction(hfsmp);
- if (vp) {
- hfs_unlock(VTOC(vp));
+ if ((cp != NULL) && (vp != NULL)) {
+ hfs_unlock(cp);
+ }
+ if (error) {
+ if (vp) {
+ vnode_put(vp);
+ }
+ *vpp = NULL;
}
return (error);
}
*
* In fact, the offset used by HFS is essentially an index (26 bits)
* with a tag (6 bits). The tag is for associating the next request
- * with the current request. This enables us to have multiple threads
+ * with the current request. This enables us to have multiple threads
* reading the directory while the directory is also being modified.
*
* Each tag/index pair is tied to a unique directory hint. The hint
* contains information (filename) needed to build the catalog b-tree
* key for finding the next set of entries.
+ *
+ * If the directory is marked as deleted-but-in-use (cp->c_flag & C_DELETED),
+ * do NOT synthesize entries for "." and "..".
*/
-static int
+int
hfs_vnop_readdir(ap)
struct vnop_readdir_args /* {
vnode_t a_vp;
int lockflags;
int extended;
int nfs_cookies;
- caddr_t bufstart;
cnid_t cnid_hint = 0;
+ int bump_valence = 0;
items = 0;
startoffset = offset = uio_offset(uio);
- bufstart = CAST_DOWN(caddr_t, uio_iov_base(uio));
extended = (ap->a_flags & VNODE_READDIR_EXTENDED);
nfs_cookies = extended && (ap->a_flags & VNODE_READDIR_REQSEEKOFF);
/* Sanity check the uio data. */
- if ((uio_iovcnt(uio) > 1) ||
- (uio_resid(uio) < (int)sizeof(struct dirent))) {
+ if (uio_iovcnt(uio) > 1)
return (EINVAL);
+
+ if (VTOC(vp)->c_bsdflags & UF_COMPRESSED) {
+ int compressed = hfs_file_is_compressed(VTOC(vp), 0); /* 0 == take the cnode lock */
+ if (VTOCMP(vp) != NULL && !compressed) {
+ error = check_for_dataless_file(vp, NAMESPACE_HANDLER_READ_OP);
+ if (error) {
+ return error;
+ }
+ }
}
- /* Note that the dirhint calls require an exclusive lock. */
- if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK)))
- return (error);
+
cp = VTOC(vp);
hfsmp = VTOHFS(vp);
+ /* Note that the dirhint calls require an exclusive lock. */
+ if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT)))
+ return (error);
+
/* Pick up cnid hint (if any). */
if (nfs_cookies) {
cnid_hint = (cnid_t)(uio_offset(uio) >> 32);
}
}
/*
- * Synthesize entries for "." and ".."
+ * Synthesize entries for "." and "..", unless the directory has
+ * been deleted, but not closed yet (lazy delete in progress).
*/
- if (offset == 0) {
+ if (offset == 0 && !(cp->c_flag & C_DELETED)) {
hfs_dotentry_t dotentry[2];
size_t uiosize;
offset += 2;
}
- /* If there are no real entries then we're done. */
- if (cp->c_entries == 0) {
- error = 0;
- eofflag = 1;
- uio_setoffset(uio, offset);
- goto seekoffcalc;
- }
-
+ /*
+ * Intentionally avoid checking the valence here. If we
+ * have FS corruption that reports the valence is 0, even though it
+ * has contents, we might artificially skip over iterating
+ * this directory.
+ */
+
//
// We have to lock the user's buffer here so that we won't
// fault on it after we've acquired a shared lock on the
// here and we can't service our page fault because VM is
// blocked trying to start a transaction as a result of
// trying to free up pages for our page fault. It's messy
- // but it does happen on dual-procesors that are paging
+ // but it does happen on dual-processors that are paging
// heavily (see radar 3082639 for more info). By locking
// the buffer up-front we prevent ourselves from faulting
// while holding the shared catalog file lock.
/* When called from NFS, try and resolve a cnid hint. */
if (nfs_cookies && cnid_hint != 0) {
if (cat_findname(hfsmp, cnid_hint, &localhint.dh_desc) == 0) {
- if ( localhint.dh_desc.cd_parentcnid == cp->c_cnid) {
+ if ( localhint.dh_desc.cd_parentcnid == cp->c_fileid) {
localhint.dh_index = index - 1;
localhint.dh_time = 0;
bzero(&localhint.dh_link, sizeof(localhint.dh_link));
/* Get a directory hint (cnode must be locked exclusive) */
if (dirhint == NULL) {
- dirhint = hfs_getdirhint(cp, ((index - 1) & HFS_INDEX_MASK) | tag);
+ dirhint = hfs_getdirhint(cp, ((index - 1) & HFS_INDEX_MASK) | tag, 0);
/* Hide tag from catalog layer. */
dirhint->dh_index &= HFS_INDEX_MASK;
}
}
+ if (index == 0) {
+ dirhint->dh_threadhint = cp->c_dirthreadhint;
+ }
+ else {
+ /*
+ * If we have a non-zero index, there is a possibility that during the last
+ * call to hfs_vnop_readdir we hit EOF for this directory. If that is the case
+ * then we don't want to return any new entries for the caller. Just return 0
+ * items, mark the eofflag, and bail out. Because we won't have done any work, the
+ * code at the end of the function will release the dirhint for us.
+ *
+ * Don't forget to unlock the catalog lock on the way out, too.
+ */
+ if (dirhint->dh_desc.cd_flags & CD_EOF) {
+ error = 0;
+ eofflag = 1;
+ uio_setoffset(uio, startoffset);
+ hfs_systemfile_unlock (hfsmp, lockflags);
+
+ goto seekoffcalc;
+ }
+ }
+
/* Pack the buffer with dirent entries. */
- error = cat_getdirentries(hfsmp, cp->c_entries, dirhint, uio, extended, &items, &eofflag);
+ error = cat_getdirentries(hfsmp, cp->c_entries, dirhint, uio, ap->a_flags, &items, &eofflag);
+
+ if (index == 0 && error == 0) {
+ cp->c_dirthreadhint = dirhint->dh_threadhint;
+ }
hfs_systemfile_unlock(hfsmp, lockflags);
if (items >= (int)cp->c_entries) {
eofflag = 1;
}
+
+ /*
+ * Detect valence FS corruption.
+ *
+ * We are holding the cnode lock exclusive, so there should not be
+ * anybody modifying the valence field of this cnode. If we enter
+ * this block, that means we observed filesystem corruption, because
+ * this directory reported a valence of 0, yet we found at least one
+ * item. In this case, we need to minimally self-heal this
+ * directory to prevent userland from tripping over a directory
+ * that appears empty (getattr of valence reports 0), but actually
+ * has contents.
+ *
+ * We'll force the cnode update at the end of the function after
+ * completing all of the normal getdirentries steps.
+ */
+ if ((cp->c_entries == 0) && (items > 0)) {
+ /* disk corruption */
+ cp->c_entries++;
+ /* Mark the cnode as dirty. */
+ cp->c_flag |= C_MODIFIED;
+ printf("hfs_vnop_readdir: repairing valence to non-zero! \n");
+ bump_valence++;
+ }
+
/* Convert catalog directory index back into an offset. */
while (tag == 0)
}
out:
- if (hfsmp->jnl && user_start) {
+ if (user_start) {
vsunlock(user_start, user_len, TRUE);
}
/* If we didn't do anything then go ahead and dump the hint. */
if (dirhint == &localhint) {
cat_releasedesc(&localhint.dh_desc);
}
+
+ if (bump_valence) {
+ /* force the update before dropping the cnode lock*/
+ hfs_update(vp, 0);
+ }
+
hfs_unlock(cp);
+
return (error);
}
/*
* Read contents of a symbolic link.
*/
-static int
+int
hfs_vnop_readlink(ap)
struct vnop_readlink_args /* {
struct vnode *a_vp;
if (!vnode_islnk(vp))
return (EINVAL);
- if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK)))
+ if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT)))
return (error);
cp = VTOC(vp);
fp = VTOF(vp);
/* Zero length sym links are not allowed */
if (fp->ff_size == 0 || fp->ff_size > MAXPATHLEN) {
- VTOVCB(vp)->vcbFlags |= kHFS_DamagedVolume;
error = EINVAL;
goto exit;
}
struct buf *bp = NULL;
MALLOC(fp->ff_symlinkptr, char *, fp->ff_size, M_TEMP, M_WAITOK);
+ if (fp->ff_symlinkptr == NULL) {
+ error = ENOMEM;
+ goto exit;
+ }
error = (int)buf_meta_bread(vp, (daddr64_t)0,
- roundup((int)fp->ff_size,
- VTOHFS(vp)->hfs_phys_block_size),
+ roundup((int)fp->ff_size, VTOHFS(vp)->hfs_physical_block_size),
vfs_context_ucred(ap->a_context), &bp);
if (error) {
if (bp)
/*
* Get configurable pathname variables.
*/
-static int
+int
hfs_vnop_pathconf(ap)
struct vnop_pathconf_args /* {
struct vnode *a_vp;
vfs_context_t a_context;
} */ *ap;
{
+
+ int std_hfs = (VTOHFS(ap->a_vp)->hfs_flags & HFS_STANDARD);
switch (ap->a_name) {
case _PC_LINK_MAX:
- if (VTOHFS(ap->a_vp)->hfs_flags & HFS_STANDARD)
- *ap->a_retval = 1;
- else
+ if (std_hfs == 0){
*ap->a_retval = HFS_LINK_MAX;
+ }
+#if CONFIG_HFS_STD
+ else {
+ *ap->a_retval = 1;
+ }
+#endif
break;
case _PC_NAME_MAX:
- if (VTOHFS(ap->a_vp)->hfs_flags & HFS_STANDARD)
- *ap->a_retval = kHFSMaxFileNameChars; /* 255 */
- else
- *ap->a_retval = kHFSPlusMaxFileNameChars; /* 31 */
+ if (std_hfs == 0) {
+ *ap->a_retval = kHFSPlusMaxFileNameChars; /* 255 */
+ }
+#if CONFIG_HFS_STD
+ else {
+ *ap->a_retval = kHFSMaxFileNameChars; /* 31 */
+ }
+#endif
break;
case _PC_PATH_MAX:
*ap->a_retval = PATH_MAX; /* 1024 */
*ap->a_retval = PIPE_BUF;
break;
case _PC_CHOWN_RESTRICTED:
- *ap->a_retval = 1;
+ *ap->a_retval = 200112; /* _POSIX_CHOWN_RESTRICTED */
break;
case _PC_NO_TRUNC:
- *ap->a_retval = 0;
+ *ap->a_retval = 200112; /* _POSIX_NO_TRUNC */
break;
case _PC_NAME_CHARS_MAX:
- *ap->a_retval = kHFSPlusMaxFileNameChars;
+ if (std_hfs == 0) {
+ *ap->a_retval = kHFSPlusMaxFileNameChars; /* 255 */
+ }
+#if CONFIG_HFS_STD
+ else {
+ *ap->a_retval = kHFSMaxFileNameChars; /* 31 */
+ }
+#endif
break;
case _PC_CASE_SENSITIVE:
if (VTOHFS(ap->a_vp)->hfs_flags & HFS_CASE_SENSITIVE)
case _PC_CASE_PRESERVING:
*ap->a_retval = 1;
break;
+ case _PC_FILESIZEBITS:
+ /* number of bits to store max file size */
+ if (std_hfs == 0) {
+ *ap->a_retval = 64;
+ }
+#if CONFIG_HFS_STD
+ else {
+ *ap->a_retval = 32;
+ }
+#endif
+ break;
+ case _PC_XATTR_SIZE_BITS:
+ /* Number of bits to store maximum extended attribute size */
+ *ap->a_retval = HFS_XATTR_SIZE_BITS;
+ break;
default:
return (EINVAL);
}
return (0);
}
+/*
+ * Prepares a fork for cat_update by making sure ff_size and ff_blocks
+ * are no bigger than the valid data on disk thus reducing the chance
+ * of exposing uninitialised data in the event of a non clean unmount.
+ * fork_buf is where to put the temporary copy if required. (It can
+ * be inside pfork.)
+ */
+const struct cat_fork *
+hfs_prepare_fork_for_update(filefork_t *ff,
+ const struct cat_fork *cf,
+ struct cat_fork *cf_buf,
+ uint32_t block_size)
+{
+ if (!ff)
+ return NULL;
+
+ if (!cf)
+ cf = &ff->ff_data;
+ if (!cf_buf)
+ cf_buf = &ff->ff_data;
+
+ off_t max_size = ff->ff_size;
+
+ // Check first invalid range
+ if (!TAILQ_EMPTY(&ff->ff_invalidranges))
+ max_size = TAILQ_FIRST(&ff->ff_invalidranges)->rl_start;
+
+ if (!ff->ff_unallocblocks && ff->ff_size <= max_size)
+ return cf; // Nothing to do
+
+ if (ff->ff_blocks < ff->ff_unallocblocks) {
+ panic("hfs: ff_blocks %d is less than unalloc blocks %d\n",
+ ff->ff_blocks, ff->ff_unallocblocks);
+ }
+
+ struct cat_fork *out = cf_buf;
+
+ if (out != cf)
+ bcopy(cf, out, sizeof(*cf));
+
+ // Adjust cf_blocks for cf_vblocks
+ out->cf_blocks -= out->cf_vblocks;
+
+ /*
+ * Here we trim the size with the updated cf_blocks. This is
+ * probably unnecessary now because the invalid ranges should
+ * catch this (but that wasn't always the case).
+ */
+ off_t alloc_bytes = hfs_blk_to_bytes(out->cf_blocks, block_size);
+ if (out->cf_size > alloc_bytes)
+ out->cf_size = alloc_bytes;
+
+ // Trim cf_size to first invalid range
+ if (out->cf_size > max_size)
+ out->cf_size = max_size;
+
+ return out;
+}
/*
* Update a cnode's on-disk metadata.
*
- * If waitfor is set, then wait for the disk write of
- * the node to complete.
- *
- * The cnode must be locked exclusive
+ * The cnode must be locked exclusive. See declaration for possible
+ * options.
*/
-__private_extern__
int
-hfs_update(struct vnode *vp, __unused int waitfor)
+hfs_update(struct vnode *vp, int options)
{
struct cnode *cp = VTOC(vp);
struct proc *p;
- struct cat_fork *dataforkp = NULL;
- struct cat_fork *rsrcforkp = NULL;
+ const struct cat_fork *dataforkp = NULL;
+ const struct cat_fork *rsrcforkp = NULL;
struct cat_fork datafork;
+ struct cat_fork rsrcfork;
struct hfsmount *hfsmp;
int lockflags;
int error;
+ uint32_t tstate = 0;
+
+ if (ISSET(cp->c_flag, C_NOEXISTS))
+ return 0;
p = current_proc();
hfsmp = VTOHFS(vp);
- if (vnode_issystem(vp) && (cp->c_cnid < kHFSFirstUserCatalogNodeID)) {
+ if (((vnode_issystem(vp) && (cp->c_cnid < kHFSFirstUserCatalogNodeID))) ||
+ hfsmp->hfs_catalog_vp == NULL){
return (0);
}
if ((hfsmp->hfs_flags & HFS_READ_ONLY) || (cp->c_mode == 0)) {
- cp->c_flag &= ~C_MODIFIED;
+ CLR(cp->c_flag, C_MODIFIED | C_MINOR_MOD | C_NEEDS_DATEADDED);
cp->c_touch_acctime = 0;
cp->c_touch_chgtime = 0;
cp->c_touch_modtime = 0;
return (0);
}
-
+ if (kdebug_enable) {
+ if (cp->c_touch_acctime || cp->c_atime != cp->c_attr.ca_atimeondisk)
+ tstate |= DBG_HFS_UPDATE_ACCTIME;
+ if (cp->c_touch_modtime)
+ tstate |= DBG_HFS_UPDATE_MODTIME;
+ if (cp->c_touch_chgtime)
+ tstate |= DBG_HFS_UPDATE_CHGTIME;
+
+ if (cp->c_flag & C_MODIFIED)
+ tstate |= DBG_HFS_UPDATE_MODIFIED;
+ if (ISSET(options, HFS_UPDATE_FORCE))
+ tstate |= DBG_HFS_UPDATE_FORCE;
+ if (cp->c_flag & C_NEEDS_DATEADDED)
+ tstate |= DBG_HFS_UPDATE_DATEADDED;
+ if (cp->c_flag & C_MINOR_MOD)
+ tstate |= DBG_HFS_UPDATE_MINOR;
+ }
hfs_touchtimes(hfsmp, cp);
- /* Nothing to update. */
- if ((cp->c_flag & (C_MODIFIED | C_FORCEUPDATE)) == 0) {
- return (0);
+ if (!ISSET(cp->c_flag, C_MODIFIED | C_MINOR_MOD)
+ && !hfs_should_save_atime(cp)) {
+ // Nothing to update
+ return 0;
}
-
+
+ KDBG(HFSDBG_UPDATE | DBG_FUNC_START, VM_KERNEL_ADDRPERM(vp), tstate);
+
+ bool check_txn = false;
+
+ if (!ISSET(options, HFS_UPDATE_FORCE) && !ISSET(cp->c_flag, C_MODIFIED)) {
+ /*
+ * This must be a minor modification. If the current
+ * transaction already has an update for this node, then we
+ * bundle in the modification.
+ */
+ if (hfsmp->jnl
+ && journal_current_txn(hfsmp->jnl) == cp->c_update_txn) {
+ check_txn = true;
+ } else {
+ tstate |= DBG_HFS_UPDATE_SKIPPED;
+ error = 0;
+ goto exit;
+ }
+ }
+
+ if ((error = hfs_start_transaction(hfsmp)) != 0)
+ goto exit;
+
+ if (check_txn
+ && journal_current_txn(hfsmp->jnl) != cp->c_update_txn) {
+ hfs_end_transaction(hfsmp);
+ tstate |= DBG_HFS_UPDATE_SKIPPED;
+ error = 0;
+ goto exit;
+ }
+
if (cp->c_datafork)
dataforkp = &cp->c_datafork->ff_data;
if (cp->c_rsrcfork)
rsrcforkp = &cp->c_rsrcfork->ff_data;
- /*
- * For delayed allocations updates are
- * postponed until an fsync or the file
- * gets written to disk.
- *
- * Deleted files can defer meta data updates until inactive.
- *
- * If we're ever called with the C_FORCEUPDATE flag though
- * we have to do the update.
- */
- if (ISSET(cp->c_flag, C_FORCEUPDATE) == 0 &&
- (ISSET(cp->c_flag, C_DELETED) ||
- (dataforkp && cp->c_datafork->ff_unallocblocks) ||
- (rsrcforkp && cp->c_rsrcfork->ff_unallocblocks))) {
- // cp->c_flag &= ~(C_ACCESS | C_CHANGE | C_UPDATE);
- cp->c_flag |= C_MODIFIED;
+ /*
+ * Modify the values passed to cat_update based on whether or not
+ * the file has invalid ranges or borrowed blocks.
+ */
+ dataforkp = hfs_prepare_fork_for_update(cp->c_datafork, NULL, &datafork, hfsmp->blockSize);
+ rsrcforkp = hfs_prepare_fork_for_update(cp->c_rsrcfork, NULL, &rsrcfork, hfsmp->blockSize);
- HFS_KNOTE(vp, NOTE_ATTRIB);
+ if (__improbable(kdebug_enable & KDEBUG_TRACE)) {
+ long dbg_parms[NUMPARMS];
+ int dbg_namelen;
- return (0);
- }
+ dbg_namelen = NUMPARMS * sizeof(long);
+ vn_getpath(vp, (char *)dbg_parms, &dbg_namelen);
- if ((error = hfs_start_transaction(hfsmp)) != 0) {
- return error;
- }
+ if (dbg_namelen < (int)sizeof(dbg_parms))
+ memset((char *)dbg_parms + dbg_namelen, 0, sizeof(dbg_parms) - dbg_namelen);
- /*
- * For files with invalid ranges (holes) the on-disk
- * field representing the size of the file (cf_size)
- * must be no larger than the start of the first hole.
- */
- if (dataforkp && !CIRCLEQ_EMPTY(&cp->c_datafork->ff_invalidranges)) {
- bcopy(dataforkp, &datafork, sizeof(datafork));
- datafork.cf_size = CIRCLEQ_FIRST(&cp->c_datafork->ff_invalidranges)->rl_start;
- dataforkp = &datafork;
- } else if (dataforkp && (cp->c_datafork->ff_unallocblocks != 0)) {
- // always make sure the block count and the size
- // of the file match the number of blocks actually
- // allocated to the file on disk
- bcopy(dataforkp, &datafork, sizeof(datafork));
- // make sure that we don't assign a negative block count
- if (cp->c_datafork->ff_blocks < cp->c_datafork->ff_unallocblocks) {
- panic("hfs: ff_blocks %d is less than unalloc blocks %d\n",
- cp->c_datafork->ff_blocks, cp->c_datafork->ff_unallocblocks);
- }
- datafork.cf_blocks = (cp->c_datafork->ff_blocks - cp->c_datafork->ff_unallocblocks);
- datafork.cf_size = datafork.cf_blocks * HFSTOVCB(hfsmp)->blockSize;
- dataforkp = &datafork;
+ kdebug_lookup_gen_events(dbg_parms, dbg_namelen, (void *)vp, TRUE);
}
/*
* Lock the Catalog b-tree file.
- * A shared lock is sufficient since an update doesn't change
- * the tree and the lock on vp protects the cnode.
*/
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
- /* XXX - waitfor is not enforced */
error = cat_update(hfsmp, &cp->c_desc, &cp->c_attr, dataforkp, rsrcforkp);
+ if (hfsmp->jnl)
+ cp->c_update_txn = journal_current_txn(hfsmp->jnl);
+
hfs_systemfile_unlock(hfsmp, lockflags);
- /* After the updates are finished, clear the flags */
- cp->c_flag &= ~(C_MODIFIED | C_FORCEUPDATE);
+ CLR(cp->c_flag, C_MODIFIED | C_MINOR_MOD);
hfs_end_transaction(hfsmp);
- HFS_KNOTE(vp, NOTE_ATTRIB);
-
- return (error);
+exit:
+
+ KDBG(HFSDBG_UPDATE | DBG_FUNC_END, VM_KERNEL_ADDRPERM(vp), tstate, error);
+
+ return error;
}
/*
* Allocate a new node
*/
-static int
+int
hfs_makenode(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
struct vnode_attr *vap, vfs_context_t ctx)
{
struct cnode *cp = NULL;
- struct cnode *dcp;
+ struct cnode *dcp = NULL;
struct vnode *tvp;
struct hfsmount *hfsmp;
struct cat_desc in_desc, out_desc;
struct cat_attr attr;
struct timeval tv;
- cat_cookie_t cookie;
int lockflags;
- int error, started_tr = 0, got_cookie = 0;
+ int error, started_tr = 0;
enum vtype vnodetype;
int mode;
+ int newvnode_flags = 0;
+ u_int32_t gnv_flags = 0;
+ int protectable_target = 0;
+ int nocache = 0;
+
+#if CONFIG_PROTECT
+ struct cprotect *entry = NULL;
+ int32_t cp_class = -1;
+
+ /*
+ * By default, it's OK for AKS to overrride our target class preferences.
+ */
+ uint32_t keywrap_flags = CP_KEYWRAP_DIFFCLASS;
+
+ if (VATTR_IS_ACTIVE(vap, va_dataprotect_class)) {
+ cp_class = (int32_t)vap->va_dataprotect_class;
+ /*
+ * Since the user specifically requested this target class be used,
+ * we want to fail this creation operation if we cannot wrap to their
+ * target class. The CP_KEYWRAP_DIFFCLASS bit says that it is OK to
+ * use a different class than the one specified, so we turn that off
+ * now.
+ */
+ keywrap_flags &= ~CP_KEYWRAP_DIFFCLASS;
+ }
+ int protected_mount = 0;
+#endif
+
- if ((error = hfs_lock(VTOC(dvp), HFS_EXCLUSIVE_LOCK)))
+ if ((error = hfs_lock(VTOC(dvp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT)))
return (error);
+
+ /* set the cnode pointer only after successfully acquiring lock */
dcp = VTOC(dvp);
+
+ /* Don't allow creation of new entries in open-unlinked directories */
+ if ((error = hfs_checkdeleted(dcp))) {
+ hfs_unlock(dcp);
+ return error;
+ }
+
+ dcp->c_flag |= C_DIR_MODIFICATION;
+
hfsmp = VTOHFS(dvp);
+
*vpp = NULL;
tvp = NULL;
out_desc.cd_flags = 0;
out_desc.cd_nameptr = NULL;
- mode = MAKEIMODE(vap->va_type, vap->va_mode);
+ vnodetype = vap->va_type;
+ if (vnodetype == VNON)
+ vnodetype = VREG;
+ mode = MAKEIMODE(vnodetype, vap->va_mode);
- if ((mode & S_IFMT) == 0)
- mode |= S_IFREG;
- vnodetype = IFTOVT(mode);
+ if (S_ISDIR (mode) || S_ISREG (mode)) {
+ protectable_target = 1;
+ }
+
/* Check if were out of usable disk space. */
- if ((hfs_freeblks(hfsmp, 1) <= 0) && (suser(vfs_context_ucred(ctx), NULL) != 0)) {
+ if ((hfs_freeblks(hfsmp, 1) == 0) && (vfs_context_suser(ctx) != 0)) {
error = ENOSPC;
goto exit;
}
/* Setup the default attributes */
bzero(&attr, sizeof(attr));
attr.ca_mode = mode;
- attr.ca_nlink = vnodetype == VDIR ? 2 : 1;
- attr.ca_mtime = tv.tv_sec;
- if ((VTOVCB(dvp)->vcbSigWord == kHFSSigWord) && gTimeZone.tz_dsttime) {
- attr.ca_mtime += 3600; /* Same as what hfs_update does */
+ attr.ca_linkcount = 1;
+ if (VATTR_IS_ACTIVE(vap, va_rdev)) {
+ attr.ca_rdev = vap->va_rdev;
+ }
+ if (VATTR_IS_ACTIVE(vap, va_create_time)) {
+ VATTR_SET_SUPPORTED(vap, va_create_time);
+ attr.ca_itime = vap->va_create_time.tv_sec;
+ } else {
+ attr.ca_itime = tv.tv_sec;
+ }
+#if CONFIG_HFS_STD
+ if ((hfsmp->hfs_flags & HFS_STANDARD) && gTimeZone.tz_dsttime) {
+ attr.ca_itime += 3600; /* Same as what hfs_update does */
}
- attr.ca_atime = attr.ca_ctime = attr.ca_itime = attr.ca_mtime;
+#endif
+ attr.ca_atime = attr.ca_ctime = attr.ca_mtime = attr.ca_itime;
attr.ca_atimeondisk = attr.ca_atime;
- /* On HFS+ the ThreadExists flag must always be set for files. */
- if (vnodetype != VDIR && (hfsmp->hfs_flags & HFS_STANDARD) == 0)
- attr.ca_recflags = kHFSThreadExistsMask;
+ if (VATTR_IS_ACTIVE(vap, va_flags)) {
+ VATTR_SET_SUPPORTED(vap, va_flags);
+ attr.ca_flags = vap->va_flags;
+ }
+
+ /*
+ * HFS+ only: all files get ThreadExists
+ * HFSX only: dirs get HasFolderCount
+ */
+ if (!(hfsmp->hfs_flags & HFS_STANDARD)) {
+ if (vnodetype == VDIR) {
+ if (hfsmp->hfs_flags & HFS_FOLDERCOUNT)
+ attr.ca_recflags = kHFSHasFolderCountMask;
+ } else {
+ attr.ca_recflags = kHFSThreadExistsMask;
+ }
+ }
+
+#if CONFIG_PROTECT
+ if (cp_fs_protected(hfsmp->hfs_mp)) {
+ protected_mount = 1;
+ }
+ /*
+ * On a content-protected HFS+/HFSX filesystem, files and directories
+ * cannot be created without atomically setting/creating the EA that
+ * contains the protection class metadata and keys at the same time, in
+ * the same transaction. As a result, pre-set the "EAs exist" flag
+ * on the cat_attr for protectable catalog record creations. This will
+ * cause the cnode creation routine in hfs_getnewvnode to mark the cnode
+ * as having EAs.
+ */
+ if ((protected_mount) && (protectable_target)) {
+ attr.ca_recflags |= kHFSHasAttributesMask;
+ /* delay entering in the namecache */
+ nocache = 1;
+ }
+#endif
+
+
+ /*
+ * Add the date added to the item. See above, as
+ * all of the dates are set to the itime.
+ */
+ hfs_write_dateadded (&attr, attr.ca_atime);
+
+ /* Initialize the gen counter to 1 */
+ hfs_write_gencount(&attr, (uint32_t)1);
attr.ca_uid = vap->va_uid;
attr.ca_gid = vap->va_gid;
VATTR_SET_SUPPORTED(vap, va_uid);
VATTR_SET_SUPPORTED(vap, va_gid);
+#if QUOTA
+ /* check to see if this node's creation would cause us to go over
+ * quota. If so, abort this operation.
+ */
+ if (hfsmp->hfs_flags & HFS_QUOTAS) {
+ if ((error = hfs_quotacheck(hfsmp, 1, attr.ca_uid, attr.ca_gid,
+ vfs_context_ucred(ctx)))) {
+ goto exit;
+ }
+ }
+#endif
+
+
/* Tag symlinks with a type and creator. */
if (vnodetype == VLNK) {
struct FndrFileInfo *fip;
fip->fdType = SWAP_BE32(kSymLinkFileType);
fip->fdCreator = SWAP_BE32(kSymLinkCreator);
}
- if (cnp->cn_flags & ISWHITEOUT)
- attr.ca_flags |= UF_OPAQUE;
/* Setup the descriptor */
- in_desc.cd_nameptr = cnp->cn_nameptr;
+ in_desc.cd_nameptr = (const u_int8_t *)cnp->cn_nameptr;
in_desc.cd_namelen = cnp->cn_namelen;
- in_desc.cd_parentcnid = dcp->c_cnid;
+ in_desc.cd_parentcnid = dcp->c_fileid;
in_desc.cd_flags = S_ISDIR(mode) ? CD_ISDIR : 0;
in_desc.cd_hint = dcp->c_childhint;
in_desc.cd_encoding = 0;
+#if CONFIG_PROTECT
+ /*
+ * To preserve file creation atomicity with regards to the content protection EA,
+ * we must create the file in the catalog and then write out its EA in the same
+ * transaction.
+ *
+ * We only denote the target class in this EA; key generation is not completed
+ * until the file has been inserted into the catalog and will be done
+ * in a separate transaction.
+ */
+ if ((protected_mount) && (protectable_target)) {
+ error = cp_setup_newentry(hfsmp, dcp, cp_class, attr.ca_mode, &entry);
+ if (error) {
+ goto exit;
+ }
+ }
+#endif
+
if ((error = hfs_start_transaction(hfsmp)) != 0) {
goto exit;
}
started_tr = 1;
- /*
- * Reserve some space in the Catalog file.
- *
- * (we also add CAT_DELETE since our getnewvnode
- * request can cause an hfs_inactive call to
- * delete an unlinked file)
- */
- if ((error = cat_preflight(hfsmp, CAT_CREATE | CAT_DELETE, &cookie, 0))) {
+ // have to also lock the attribute file because cat_create() needs
+ // to check that any fileID it wants to use does not have orphaned
+ // attributes in it.
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
+ cnid_t new_id;
+
+ /* Reserve some space in the Catalog file. */
+ if ((error = cat_preflight(hfsmp, CAT_CREATE, NULL, 0))) {
+ hfs_systemfile_unlock(hfsmp, lockflags);
goto exit;
}
- got_cookie = 1;
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
- error = cat_create(hfsmp, &in_desc, &attr, &out_desc);
+ if ((error = cat_acquire_cnid(hfsmp, &new_id))) {
+ hfs_systemfile_unlock (hfsmp, lockflags);
+ goto exit;
+ }
+
+ error = cat_create(hfsmp, new_id, &in_desc, &attr, &out_desc);
if (error == 0) {
/* Update the parent directory */
dcp->c_childhint = out_desc.cd_hint; /* Cache directory's location */
- dcp->c_nlink++;
dcp->c_entries++;
- dcp->c_ctime = tv.tv_sec;
- dcp->c_mtime = tv.tv_sec;
- (void) cat_update(hfsmp, &dcp->c_desc, &dcp->c_attr, NULL, NULL);
- HFS_KNOTE(dvp, NOTE_ATTRIB);
+
+ if (vnodetype == VDIR) {
+ INC_FOLDERCOUNT(hfsmp, dcp->c_attr);
+ }
+ dcp->c_dirchangecnt++;
+ hfs_incr_gencount(dcp);
+
+ dcp->c_touch_chgtime = dcp->c_touch_modtime = true;
+ dcp->c_flag |= C_MODIFIED;
+
+ hfs_update(dcp->c_vp, 0);
+
+#if CONFIG_PROTECT
+ /*
+ * If we are creating a content protected file, now is when
+ * we create the EA. We must create it in the same transaction
+ * that creates the file. We can also guarantee that the file
+ * MUST exist because we are still holding the catalog lock
+ * at this point.
+ */
+ if ((attr.ca_fileid != 0) && (protected_mount) && (protectable_target)) {
+ error = cp_setxattr (NULL, entry, hfsmp, attr.ca_fileid, XATTR_CREATE);
+
+ if (error) {
+ int delete_err;
+ /*
+ * If we fail the EA creation, then we need to delete the file.
+ * Luckily, we are still holding all of the right locks.
+ */
+ delete_err = cat_delete (hfsmp, &out_desc, &attr);
+ if (delete_err == 0) {
+ /* Update the parent directory */
+ if (dcp->c_entries > 0)
+ dcp->c_entries--;
+ dcp->c_dirchangecnt++;
+ dcp->c_ctime = tv.tv_sec;
+ dcp->c_mtime = tv.tv_sec;
+ (void) cat_update(hfsmp, &dcp->c_desc, &dcp->c_attr, NULL, NULL);
+ }
+
+ /* Emit EINVAL if we fail to create EA*/
+ error = EINVAL;
+ }
+ }
+#endif
}
hfs_systemfile_unlock(hfsmp, lockflags);
if (error)
goto exit;
-
+
+ uint32_t txn = hfsmp->jnl ? journal_current_txn(hfsmp->jnl) : 0;
+
/* Invalidate negative cache entries in the directory */
- if (hfsmp->hfs_flags & HFS_CASE_SENSITIVE)
+ if (dcp->c_flag & C_NEG_ENTRIES) {
cache_purge_negatives(dvp);
-
- if (vnodetype == VDIR) {
- HFS_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
- } else {
- HFS_KNOTE(dvp, NOTE_WRITE);
- };
+ dcp->c_flag &= ~C_NEG_ENTRIES;
+ }
hfs_volupdate(hfsmp, vnodetype == VDIR ? VOL_MKDIR : VOL_MKFILE,
(dcp->c_cnid == kHFSRootFolderID));
started_tr = 0;
}
+#if CONFIG_PROTECT
+ /*
+ * At this point, we must have encountered success with writing the EA.
+ * Destroy our temporary cprotect (which had no keys).
+ */
+
+ if ((attr.ca_fileid != 0) && (protected_mount) && (protectable_target)) {
+ cp_entry_destroy (hfsmp, entry);
+ entry = NULL;
+ }
+#endif
+ gnv_flags |= GNV_CREATE;
+ if (nocache) {
+ gnv_flags |= GNV_NOCACHE;
+ }
+
/*
* Create a vnode for the object just created.
- *
+ *
+ * NOTE: Maintaining the cnode lock on the parent directory is important,
+ * as it prevents race conditions where other threads want to look up entries
+ * in the directory and/or add things as we are in the process of creating
+ * the vnode below. However, this has the potential for causing a
+ * double lock panic when dealing with shadow files on a HFS boot partition.
+ * The panic could occur if we are not cleaning up after ourselves properly
+ * when done with a shadow file or in the error cases. The error would occur if we
+ * try to create a new vnode, and then end up reclaiming another shadow vnode to
+ * create the new one. However, if everything is working properly, this should
+ * be a non-issue as we would never enter that reclaim codepath.
+ *
* The cnode is locked on successful return.
*/
- error = hfs_getnewvnode(hfsmp, dvp, cnp, &out_desc, 0, &attr, NULL, &tvp);
+ error = hfs_getnewvnode(hfsmp, dvp, cnp, &out_desc, gnv_flags, &attr,
+ NULL, &tvp, &newvnode_flags);
if (error)
goto exit;
- // XXXdbg
- //cache_enter(dvp, tvp, cnp);
+ cp = VTOC(tvp);
+
+ cp->c_update_txn = txn;
+
+ struct doc_tombstone *ut;
+ ut = get_uthread_doc_tombstone();
+ if ( ut->t_lastop_document_id != 0
+ && ut->t_lastop_parent == dvp
+ && ut->t_lastop_parent_vid == vnode_vid(dvp)
+ && strcmp((char *)ut->t_lastop_filename, (const char *)cp->c_desc.cd_nameptr) == 0) {
+ struct FndrExtendedDirInfo *fip = (struct FndrExtendedDirInfo *)((char *)&cp->c_attr.ca_finderinfo + 16);
+
+ //printf("CREATE: preserving doc-id %lld on %s\n", ut->t_lastop_document_id, ut->t_lastop_filename);
+ fip->document_id = (uint32_t)(ut->t_lastop_document_id & 0xffffffff);
+
+ cp->c_bsdflags |= UF_TRACKED;
+ cp->c_flag |= C_MODIFIED;
+
+ if ((error = hfs_start_transaction(hfsmp)) == 0) {
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
+
+ (void) cat_update(hfsmp, &cp->c_desc, &cp->c_attr, NULL, NULL);
+
+ hfs_systemfile_unlock (hfsmp, lockflags);
+ (void) hfs_end_transaction(hfsmp);
+ }
+
+ clear_tombstone_docid(ut, hfsmp, cp); // will send the docid-changed fsevent
+ } else if (ut->t_lastop_document_id != 0) {
+ int len = cnp->cn_namelen;
+ if (len == 0) {
+ len = strlen(cnp->cn_nameptr);
+ }
+
+ if (is_ignorable_temp_name(cnp->cn_nameptr, cnp->cn_namelen)) {
+ // printf("CREATE: not clearing tombstone because %s is a temp name.\n", cnp->cn_nameptr);
+ } else {
+ // Clear the tombstone because the thread is not recreating the same path
+ // printf("CREATE: clearing tombstone because %s is NOT a temp name.\n", cnp->cn_nameptr);
+ clear_tombstone_docid(ut, hfsmp, NULL);
+ }
+ }
+
+ if ((hfsmp->hfs_flags & HFS_CS_HOTFILE_PIN) && (vnode_isfastdevicecandidate(dvp) && !vnode_isautocandidate(dvp))) {
+
+ //printf("hfs: flagging %s (fileid: %d) as VFASTDEVCANDIDATE (dvp name: %s)\n",
+ // cnp->cn_nameptr ? cnp->cn_nameptr : "<NONAME>",
+ // cp->c_fileid,
+ // dvp->v_name ? dvp->v_name : "no-dir-name");
+
+ //
+ // On new files we set the FastDevCandidate flag so that
+ // any new blocks allocated to it will be pinned.
+ //
+ cp->c_attr.ca_recflags |= kHFSFastDevCandidateMask;
+ vnode_setfastdevicecandidate(tvp);
+
+ //
+ // properly inherit auto-cached flags
+ //
+ if (vnode_isautocandidate(dvp)) {
+ cp->c_attr.ca_recflags |= kHFSAutoCandidateMask;
+ vnode_setautocandidate(tvp);
+ }
+
+
+ //
+ // We also want to add it to the hotfile adoption list so
+ // that it will eventually land in the hotfile btree
+ //
+ (void) hfs_addhotfile(tvp);
+ }
+
+ *vpp = tvp;
+
+#if CONFIG_PROTECT
+ /*
+ * Now that we have a vnode-in-hand, generate keys for this namespace item.
+ * If we fail to create the keys, then attempt to delete the item from the
+ * namespace. If we can't delete the item, that's not desirable but also not fatal..
+ * All of the places which deal with restoring/unwrapping keys must also be
+ * prepared to encounter an entry that does not have keys.
+ */
+ if ((protectable_target) && (protected_mount)) {
+ struct cprotect *keyed_entry = NULL;
+
+ if (cp->c_cpentry == NULL) {
+ panic ("hfs_makenode: no cpentry for cnode (%p)", cp);
+ }
+
+ error = cp_generate_keys (hfsmp, cp, CP_CLASS(cp->c_cpentry->cp_pclass), keywrap_flags, &keyed_entry);
+ if (error == 0) {
+ /*
+ * Upon success, the keys were generated and written out.
+ * Update the cp pointer in the cnode.
+ */
+ cp_replace_entry (hfsmp, cp, keyed_entry);
+ if (nocache) {
+ cache_enter (dvp, tvp, cnp);
+ }
+ }
+ else {
+ /* If key creation OR the setxattr failed, emit EPERM to userland */
+ error = EPERM;
+
+ /*
+ * Beware! This slightly violates the lock ordering for the
+ * cnode/vnode 'tvp'. Ordinarily, you must acquire the truncate lock
+ * which guards file size changes before acquiring the normal cnode lock
+ * and calling hfs_removefile on an item.
+ *
+ * However, in this case, we are still holding the directory lock so
+ * 'tvp' is not lookup-able and it was a newly created vnode so it
+ * cannot have any content yet. The only reason we are initiating
+ * the removefile is because we could not generate content protection keys
+ * for this namespace item. Note also that we pass a '1' in the allow_dirs
+ * argument for hfs_removefile because we may be creating a directory here.
+ *
+ * All this to say that while it is technically a violation it is
+ * impossible to race with another thread for this cnode so it is safe.
+ */
+ int err = hfs_removefile (dvp, tvp, cnp, 0, 0, 1, NULL, 0);
+ if (err) {
+ printf("hfs_makenode: removefile failed (%d) for CP entry %p\n", err, tvp);
+ }
+
+ /* Release the cnode lock and mark the vnode for termination */
+ hfs_unlock (cp);
+ err = vnode_recycle (tvp);
+ if (err) {
+ printf("hfs_makenode: vnode_recycle failed (%d) for CP entry %p\n", err, tvp);
+ }
+
+ /* Drop the iocount on the new vnode to force reclamation/recycling */
+ vnode_put (tvp);
+ cp = NULL;
+ *vpp = NULL;
+ }
+ }
+#endif
- cp = VTOC(tvp);
#if QUOTA
/*
- * We call hfs_chkiq with FORCE flag so that if we
- * fall through to the rmdir we actually have
- * accounted for the inode
- */
- if (vfs_flags(HFSTOVFS(hfsmp)) & MNT_QUOTA) {
- if ((error = hfs_getinoquota(cp)) ||
- (error = hfs_chkiq(cp, 1, vfs_context_ucred(ctx), FORCE))) {
-
- if (vnode_isdir(tvp))
- (void) hfs_removedir(dvp, tvp, cnp, 0);
- else {
- hfs_unlock(cp);
- hfs_lock_truncate(cp, TRUE);
- hfs_lock(cp, HFS_FORCE_LOCK);
- (void) hfs_removefile(dvp, tvp, cnp, 0, 0);
- hfs_unlock_truncate(cp);
- }
- /*
- * we successfully allocated a new vnode, but
- * the quota check is telling us we're beyond
- * our limit, so we need to dump our lock + reference
- */
- hfs_unlock(cp);
- vnode_put(tvp);
-
- goto exit;
+ * Once we create this vnode, we need to initialize its quota data
+ * structures, if necessary. We know that it is OK to just go ahead and
+ * initialize because we've already validated earlier (through the hfs_quotacheck
+ * function) to see if creating this cnode/vnode would cause us to go over quota.
+ */
+ if (hfsmp->hfs_flags & HFS_QUOTAS) {
+ if (cp) {
+ /* cp could have been zeroed earlier */
+ (void) hfs_getinoquota(cp);
}
}
-#endif /* QUOTA */
+#endif
- /* Remember if any ACL data was set. */
- if (VATTR_IS_ACTIVE(vap, va_acl) &&
- (vap->va_acl != NULL)) {
- cp->c_attr.ca_recflags |= kHFSHasSecurityMask;
- cp->c_touch_chgtime = TRUE;
- (void) hfs_update(tvp, TRUE);
- }
- *vpp = tvp;
exit:
cat_releasedesc(&out_desc);
+
+#if CONFIG_PROTECT
+ /*
+ * We may have jumped here in error-handling various situations above.
+ * If we haven't already dumped the temporary CP used to initialize
+ * the file atomically, then free it now. cp_entry_destroy should null
+ * out the pointer if it was called already.
+ */
+ if (entry) {
+ cp_entry_destroy (hfsmp, entry);
+ entry = NULL;
+ }
+#endif
- if (got_cookie) {
- cat_postflight(hfsmp, &cookie, 0);
- }
/*
- * Check if a file is located in the "Cleanup At Startup"
- * directory. If it is then tag it as NODUMP so that we
- * can be lazy about zero filling data holes.
+ * Make sure we release cnode lock on dcp.
*/
- if ((error == 0) && dvp && (vnodetype == VREG) &&
- (dcp->c_desc.cd_nameptr != NULL) &&
- (strcmp(dcp->c_desc.cd_nameptr, CARBON_TEMP_DIR_NAME) == 0)) {
- struct vnode *ddvp;
-
- hfs_unlock(dcp);
- dvp = NULL;
-
- /*
- * The parent of "Cleanup At Startup" should
- * have the ASCII name of the userid.
- */
- if (hfs_vget(hfsmp, dcp->c_parentcnid, &ddvp, 0) == 0) {
- if (VTOC(ddvp)->c_desc.cd_nameptr) {
- uid_t uid;
-
- uid = strtoul(VTOC(ddvp)->c_desc.cd_nameptr, 0, 0);
- if ((uid == cp->c_uid) ||
- (uid == vfs_context_ucred(ctx)->cr_uid)) {
- cp->c_flags |= UF_NODUMP;
- cp->c_touch_chgtime = TRUE;
- }
- }
- hfs_unlock(VTOC(ddvp));
- vnode_put(ddvp);
- }
- }
- if (dvp) {
+ if (dcp) {
+ dcp->c_flag &= ~C_DIR_MODIFICATION;
+ wakeup((caddr_t)&dcp->c_flag);
+
hfs_unlock(dcp);
}
if (error == 0 && cp != NULL) {
/*
- * WARNING - assumes caller has cnode lock.
+ * hfs_vgetrsrc acquires a resource fork vnode corresponding to the
+ * cnode that is found in 'vp'. The cnode should be locked upon entry
+ * and will be returned locked, but it may be dropped temporarily.
+ *
+ * If the resource fork vnode does not exist, HFS will attempt to acquire an
+ * empty (uninitialized) vnode from VFS so as to avoid deadlocks with
+ * jetsam. If we let the normal getnewvnode code produce the vnode for us
+ * we would be doing so while holding the cnode lock of our cnode.
+ *
+ * On success, *rvpp wlll hold the resource fork vnode with an
+ * iocount. *Don't* forget the vnode_put.
*/
-__private_extern__
int
-hfs_vgetrsrc(struct hfsmount *hfsmp, struct vnode *vp, struct vnode **rvpp, __unused struct proc *p)
+hfs_vgetrsrc(struct hfsmount *hfsmp, struct vnode *vp, struct vnode **rvpp)
{
- struct vnode *rvp;
+ struct vnode *rvp = NULLVP;
+ struct vnode *empty_rvp = NULLVP;
+ struct vnode *dvp = NULLVP;
struct cnode *cp = VTOC(vp);
int error;
int vid;
+ if (vnode_vtype(vp) == VDIR) {
+ return EINVAL;
+ }
+
+restart:
+ /* Attempt to use existing vnode */
if ((rvp = cp->c_rsrc_vp)) {
- vid = vnode_vid(rvp);
+ vid = vnode_vid(rvp);
+
+ // vnode_getwithvid can block so we need to drop the cnode lock
+ hfs_unlock(cp);
- /* Use exising vnode */
error = vnode_getwithvid(rvp, vid);
+
+ hfs_lock_always(cp, HFS_EXCLUSIVE_LOCK);
+
+ /*
+ * When our lock was relinquished, the resource fork
+ * could have been recycled. Check for this and try
+ * again.
+ */
+ if (error == ENOENT)
+ goto restart;
+
if (error) {
- char * name = VTOC(vp)->c_desc.cd_nameptr;
+ const char * name = (const char *)VTOC(vp)->c_desc.cd_nameptr;
if (name)
- printf("hfs_vgetrsrc: couldn't get"
- " resource fork for %s\n", name);
+ printf("hfs_vgetrsrc: couldn't get resource"
+ " fork for %s, vol=%s, err=%d\n", name, hfsmp->vcbVN, error);
return (error);
}
} else {
struct cat_fork rsrcfork;
struct componentname cn;
+ struct cat_desc *descptr = NULL;
+ struct cat_desc to_desc;
+ char delname[32];
int lockflags;
+ int newvnode_flags = 0;
- /*
- * Make sure cnode lock is exclusive, if not upgrade it.
+ /*
+ * In this case, we don't currently see a resource fork vnode attached
+ * to this cnode. In most cases, we were called from a read-only VNOP
+ * like getattr, so it should be safe to drop the cnode lock and then
+ * re-acquire it.
*
- * We assume that we were called from a read-only VNOP (getattr)
- * and that its safe to have the cnode lock dropped and reacquired.
+ * Here, we drop the lock so that we can acquire an empty/husk
+ * vnode so that we don't deadlock against jetsam.
+ *
+ * It does not currently appear possible to hold the truncate lock via
+ * FS re-entrancy when we get to this point. (8/2014)
*/
- if (cp->c_lockowner != current_thread()) {
- /*
- * If the upgrade fails we loose the lock and
- * have to take the exclusive lock on our own.
- */
- if (lck_rw_lock_shared_to_exclusive(&cp->c_rwlock) != 0)
- lck_rw_lock_exclusive(&cp->c_rwlock);
- cp->c_lockowner = current_thread();
+ hfs_unlock (cp);
+
+ error = vnode_create_empty (&empty_rvp);
+
+ hfs_lock_always (cp, HFS_EXCLUSIVE_LOCK);
+
+ if (error) {
+ /* If acquiring the 'empty' vnode failed, then nothing to clean up */
+ return error;
+ }
+
+ /*
+ * We could have raced with another thread here while we dropped our cnode
+ * lock. See if the cnode now has a resource fork vnode and restart if appropriate.
+ *
+ * Note: We just released the cnode lock, so there is a possibility that the
+ * cnode that we just acquired has been deleted or even removed from disk
+ * completely, though this is unlikely. If the file is open-unlinked, the
+ * check below will resolve it for us. If it has been completely
+ * removed (even from the catalog!), then when we examine the catalog
+ * directly, below, while holding the catalog lock, we will not find the
+ * item and we can fail out properly.
+ */
+ if (cp->c_rsrc_vp) {
+ /* Drop the empty vnode before restarting */
+ vnode_put (empty_rvp);
+ empty_rvp = NULL;
+ rvp = NULL;
+ goto restart;
+ }
+
+ /*
+ * hfs_vgetsrc may be invoked for a cnode that has already been marked
+ * C_DELETED. This is because we need to continue to provide rsrc
+ * fork access to open-unlinked files. In this case, build a fake descriptor
+ * like in hfs_removefile. If we don't do this, buildkey will fail in
+ * cat_lookup because this cnode has no name in its descriptor.
+ */
+ if ((cp->c_flag & C_DELETED ) && (cp->c_desc.cd_namelen == 0)) {
+ bzero (&to_desc, sizeof(to_desc));
+ bzero (delname, 32);
+ MAKE_DELETED_NAME(delname, sizeof(delname), cp->c_fileid);
+ to_desc.cd_nameptr = (const u_int8_t*) delname;
+ to_desc.cd_namelen = strlen(delname);
+ to_desc.cd_parentcnid = hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid;
+ to_desc.cd_flags = 0;
+ to_desc.cd_cnid = cp->c_cnid;
+
+ descptr = &to_desc;
+ }
+ else {
+ descptr = &cp->c_desc;
}
+
lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
+ /*
+ * We call cat_idlookup (instead of cat_lookup) below because we can't
+ * trust the descriptor in the provided cnode for lookups at this point.
+ * Between the time of the original lookup of this vnode and now, the
+ * descriptor could have gotten swapped or replaced. If this occurred,
+ * the parent/name combo originally desired may not necessarily be provided
+ * if we use the descriptor. Even worse, if the vnode represents
+ * a hardlink, we could have removed one of the links from the namespace
+ * but left the descriptor alone, since hfs_unlink does not invalidate
+ * the descriptor in the cnode if other links still point to the inode.
+ *
+ * Consider the following (slightly contrived) scenario:
+ * /tmp/a <--> /tmp/b (hardlinks).
+ * 1. Thread A: open rsrc fork on /tmp/b.
+ * 1a. Thread A: does lookup, goes out to lunch right before calling getnamedstream.
+ * 2. Thread B does 'mv /foo/b /tmp/b'
+ * 2. Thread B succeeds.
+ * 3. Thread A comes back and wants rsrc fork info for /tmp/b.
+ *
+ * Even though the hardlink backing /tmp/b is now eliminated, the descriptor
+ * is not removed/updated during the unlink process. So, if you were to
+ * do a lookup on /tmp/b, you'd acquire an entirely different record's resource
+ * fork.
+ *
+ * As a result, we use the fileid, which should be invariant for the lifetime
+ * of the cnode (possibly barring calls to exchangedata).
+ *
+ * Addendum: We can't do the above for HFS standard since we aren't guaranteed to
+ * have thread records for files. They were only required for directories. So
+ * we need to do the lookup with the catalog name. This is OK since hardlinks were
+ * never allowed on HFS standard.
+ */
+
/* Get resource fork data */
- error = cat_lookup(hfsmp, &cp->c_desc, 1, (struct cat_desc *)0,
- (struct cat_attr *)0, &rsrcfork, NULL);
+ if ((hfsmp->hfs_flags & HFS_STANDARD) == 0) {
+ error = cat_idlookup (hfsmp, cp->c_fileid, 0, 1, NULL, NULL, &rsrcfork);
+ }
+#if CONFIG_HFS_STD
+ else {
+ /*
+ * HFS standard only:
+ *
+ * Get the resource fork for this item with a cat_lookup call, but do not
+ * force a case lookup since HFS standard is case-insensitive only. We
+ * don't want the descriptor; just the fork data here. If we tried to
+ * do a ID lookup (via thread record -> catalog record), then we might fail
+ * prematurely since, as noted above, thread records were not strictly required
+ * on files in HFS.
+ */
+ error = cat_lookup (hfsmp, descptr, 1, 0, (struct cat_desc*)NULL,
+ (struct cat_attr*)NULL, &rsrcfork, NULL);
+ }
+#endif
hfs_systemfile_unlock(hfsmp, lockflags);
- if (error)
+ if (error) {
+ /* Drop our 'empty' vnode ! */
+ vnode_put (empty_rvp);
return (error);
-
+ }
/*
* Supply hfs_getnewvnode with a component name.
*/
cn.cn_pnbuf = NULL;
- if (cp->c_desc.cd_nameptr) {
+ if (descptr->cd_nameptr) {
MALLOC_ZONE(cn.cn_pnbuf, caddr_t, MAXPATHLEN, M_NAMEI, M_WAITOK);
cn.cn_nameiop = LOOKUP;
cn.cn_flags = ISLASTCN | HASBUF;
cn.cn_nameptr = cn.cn_pnbuf;
cn.cn_hash = 0;
cn.cn_consume = 0;
- cn.cn_namelen = sprintf(cn.cn_nameptr, "%s%s", cp->c_desc.cd_nameptr, _PATH_RSRCFORKSPEC);
+ cn.cn_namelen = snprintf(cn.cn_nameptr, MAXPATHLEN,
+ "%s%s", descptr->cd_nameptr,
+ _PATH_RSRCFORKSPEC);
+ // Should never happen because cn.cn_nameptr won't ever be long...
+ if (cn.cn_namelen >= MAXPATHLEN) {
+ FREE_ZONE(cn.cn_pnbuf, cn.cn_pnlen, M_NAMEI);
+ /* Drop our 'empty' vnode ! */
+ vnode_put (empty_rvp);
+ return ENAMETOOLONG;
+
+ }
}
- error = hfs_getnewvnode(hfsmp, vnode_parent(vp), cn.cn_pnbuf ? &cn : NULL,
- &cp->c_desc, 2, &cp->c_attr, &rsrcfork, &rvp);
+ dvp = vnode_getparent(vp);
+
+ /*
+ * We are about to call hfs_getnewvnode and pass in the vnode that we acquired
+ * earlier when we were not holding any locks. The semantics of GNV_USE_VP require that
+ * either hfs_getnewvnode consume the vnode and vend it back to us, properly initialized,
+ * or it will consume/dispose of it properly if it errors out.
+ */
+ rvp = empty_rvp;
+
+ error = hfs_getnewvnode(hfsmp, dvp, cn.cn_pnbuf ? &cn : NULL,
+ descptr, (GNV_WANTRSRC | GNV_SKIPLOCK | GNV_USE_VP),
+ &cp->c_attr, &rsrcfork, &rvp, &newvnode_flags);
+
+ if (dvp)
+ vnode_put(dvp);
if (cn.cn_pnbuf)
FREE_ZONE(cn.cn_pnbuf, cn.cn_pnlen, M_NAMEI);
if (error)
return (error);
- }
+ } /* End 'else' for rsrc fork not existing */
*rvpp = rvp;
return (0);
}
-
-static void
-filt_hfsdetach(struct knote *kn)
-{
- struct vnode *vp;
-
- vp = (struct vnode *)kn->kn_hook;
- if (vnode_getwithvid(vp, kn->kn_hookid))
- return;
-
- if (1) { /* ! KNDETACH_VNLOCKED */
- if (hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK) == 0) {
- (void) KNOTE_DETACH(&VTOC(vp)->c_knotes, kn);
- hfs_unlock(VTOC(vp));
- }
- }
-
- vnode_put(vp);
-}
-
-/*ARGSUSED*/
-static int
-filt_hfsread(struct knote *kn, long hint)
-{
- struct vnode *vp = (struct vnode *)kn->kn_hook;
- int dropvp = 0;
-
- if (hint == 0) {
- if ((vnode_getwithvid(vp, kn->kn_hookid) != 0)) {
- hint = NOTE_REVOKE;
- } else
- dropvp = 1;
- }
- if (hint == NOTE_REVOKE) {
- /*
- * filesystem is gone, so set the EOF flag and schedule
- * the knote for deletion.
- */
- kn->kn_flags |= (EV_EOF | EV_ONESHOT);
- return (1);
- }
-
- /* poll(2) semantics dictate always saying there is data */
- kn->kn_data = (!(kn->kn_flags & EV_POLL)) ?
- VTOF(vp)->ff_size - kn->kn_fp->f_fglob->fg_offset : 1;
-
- if (dropvp)
- vnode_put(vp);
-
- return (kn->kn_data != 0);
-}
-
-/*ARGSUSED*/
-static int
-filt_hfswrite(struct knote *kn, long hint)
-{
- int dropvp = 0;
-
- if (hint == 0) {
- if ((vnode_getwithvid(kn->kn_hook, kn->kn_hookid) != 0)) {
- hint = NOTE_REVOKE;
- } else
- vnode_put(kn->kn_hook);
- }
- if (hint == NOTE_REVOKE) {
- /*
- * filesystem is gone, so set the EOF flag and schedule
- * the knote for deletion.
- */
- kn->kn_data = 0;
- kn->kn_flags |= (EV_EOF | EV_ONESHOT);
- return (1);
- }
- kn->kn_data = 0;
- return (1);
-}
-
-static int
-filt_hfsvnode(struct knote *kn, long hint)
-{
-
- if (hint == 0) {
- if ((vnode_getwithvid(kn->kn_hook, kn->kn_hookid) != 0)) {
- hint = NOTE_REVOKE;
- } else
- vnode_put(kn->kn_hook);
- }
- if (kn->kn_sfflags & hint)
- kn->kn_fflags |= hint;
- if ((hint == NOTE_REVOKE)) {
- kn->kn_flags |= (EV_EOF | EV_ONESHOT);
- return (1);
- }
-
- return (kn->kn_fflags != 0);
-}
-
-static struct filterops hfsread_filtops =
- { 1, NULL, filt_hfsdetach, filt_hfsread };
-static struct filterops hfswrite_filtops =
- { 1, NULL, filt_hfsdetach, filt_hfswrite };
-static struct filterops hfsvnode_filtops =
- { 1, NULL, filt_hfsdetach, filt_hfsvnode };
-
-/*
- * Add a kqueue filter.
- */
-static int
-hfs_vnop_kqfiltadd(
- struct vnop_kqfilt_add_args /* {
- struct vnode *a_vp;
- struct knote *a_kn;
- struct proc *p;
- vfs_context_t a_context;
- } */ *ap)
-{
- struct vnode *vp = ap->a_vp;
- struct knote *kn = ap->a_kn;
- int error;
-
- switch (kn->kn_filter) {
- case EVFILT_READ:
- if (vnode_isreg(vp)) {
- kn->kn_fop = &hfsread_filtops;
- } else {
- return EINVAL;
- };
- break;
- case EVFILT_WRITE:
- if (vnode_isreg(vp)) {
- kn->kn_fop = &hfswrite_filtops;
- } else {
- return EINVAL;
- };
- break;
- case EVFILT_VNODE:
- kn->kn_fop = &hfsvnode_filtops;
- break;
- default:
- return (1);
- }
-
- kn->kn_hook = (caddr_t)vp;
- kn->kn_hookid = vnode_vid(vp);
-
- if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK)))
- return (error);
- KNOTE_ATTACH(&VTOC(vp)->c_knotes, kn);
- hfs_unlock(VTOC(vp));
-
- return (0);
-}
-
-/*
- * Remove a kqueue filter
- */
-static int
-hfs_vnop_kqfiltremove(ap)
- struct vnop_kqfilt_remove_args /* {
- struct vnode *a_vp;
- uintptr_t ident;
- vfs_context_t a_context;
- } */ *ap;
-{
- int result;
-
- result = ENOTSUP; /* XXX */
-
- return (result);
-}
-
/*
* Wrapper for special device reads
*/
-static int
+int
hfsspec_read(ap)
struct vnop_read_args /* {
struct vnode *a_vp;
/*
* Wrapper for special device writes
*/
-static int
+int
hfsspec_write(ap)
struct vnop_write_args /* {
struct vnode *a_vp;
*
* Update the times on the cnode then do device close.
*/
-static int
+int
hfsspec_close(ap)
struct vnop_close_args /* {
struct vnode *a_vp;
struct vnode *vp = ap->a_vp;
struct cnode *cp;
- if (vnode_isinuse(ap->a_vp, 1)) {
- if (hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK) == 0) {
+ if (vnode_isinuse(ap->a_vp, 0)) {
+ if (hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT) == 0) {
cp = VTOC(vp);
hfs_touchtimes(VTOHFS(vp), cp);
hfs_unlock(cp);
vfs_context_t a_context;
} */ *ap;
{
- extern int (**fifo_vnodeop_p)(void *);
-
/*
* Set access flag.
*/
vfs_context_t a_context;
} */ *ap;
{
- extern int (**fifo_vnodeop_p)(void *);
-
/*
* Set update and change flags.
*/
vfs_context_t a_context;
} */ *ap;
{
- extern int (**fifo_vnodeop_p)(void *);
struct vnode *vp = ap->a_vp;
struct cnode *cp;
if (vnode_isinuse(ap->a_vp, 1)) {
- if (hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK) == 0) {
+ if (hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT) == 0) {
cp = VTOC(vp);
hfs_touchtimes(VTOHFS(vp), cp);
hfs_unlock(cp);
return (VOCALL (fifo_vnodeop_p, VOFFSET(vnop_close), ap));
}
-/*
- * kqfilt_add wrapper for fifos.
- *
- * Fall through to hfs kqfilt_add routines if needed
+
+#endif /* FIFO */
+
+/*
+ * Getter for the document_id
+ * the document_id is stored in FndrExtendedFileInfo/FndrExtendedDirInfo
*/
-int
-hfsfifo_kqfilt_add(ap)
- struct vnop_kqfilt_add_args *ap;
+static u_int32_t
+hfs_get_document_id_internal(const uint8_t *finderinfo, mode_t mode)
{
- extern int (**fifo_vnodeop_p)(void *);
- int error;
+ const uint8_t *finfo = NULL;
+ u_int32_t doc_id = 0;
+
+ /* overlay the FinderInfo to the correct pointer, and advance */
+ finfo = finderinfo + 16;
+
+ if (S_ISDIR(mode) || S_ISREG(mode)) {
+ const struct FndrExtendedFileInfo *extinfo = (const struct FndrExtendedFileInfo *)finfo;
+ doc_id = extinfo->document_id;
+ } else if (S_ISDIR(mode)) {
+ const struct FndrExtendedDirInfo *extinfo = (const struct FndrExtendedDirInfo *)finfo;
+ doc_id = extinfo->document_id;
+ }
- error = VOCALL(fifo_vnodeop_p, VOFFSET(vnop_kqfilt_add), ap);
- if (error)
- error = hfs_vnop_kqfiltadd(ap);
- return (error);
+ return doc_id;
}
-/*
- * kqfilt_remove wrapper for fifos.
- *
- * Fall through to hfs kqfilt_remove routines if needed
- */
-int
-hfsfifo_kqfilt_remove(ap)
- struct vnop_kqfilt_remove_args *ap;
-{
- extern int (**fifo_vnodeop_p)(void *);
- int error;
- error = VOCALL(fifo_vnodeop_p, VOFFSET(vnop_kqfilt_remove), ap);
- if (error)
- error = hfs_vnop_kqfiltremove(ap);
- return (error);
+/* getter(s) for document id */
+u_int32_t
+hfs_get_document_id(struct cnode *cp)
+{
+ return (hfs_get_document_id_internal((u_int8_t*)cp->c_finderinfo,
+ cp->c_attr.ca_mode));
}
-#endif /* FIFO */
+/* If you have finderinfo and mode, you can use this */
+u_int32_t
+hfs_get_document_id_from_blob(const uint8_t *finderinfo, mode_t mode)
+{
+ return (hfs_get_document_id_internal(finderinfo, mode));
+}
/*
* Synchronize a file's in-core state with that on disk.
*/
-static int
+int
hfs_vnop_fsync(ap)
struct vnop_fsync_args /* {
struct vnode *a_vp;
struct vnode* vp = ap->a_vp;
int error;
+ /* Note: We check hfs flags instead of vfs mount flag because during
+ * read-write update, hfs marks itself read-write much earlier than
+ * the vfs, and hence won't result in skipping of certain writes like
+ * zero'ing out of unused nodes, creation of hotfiles btree, etc.
+ */
+ if (VTOHFS(vp)->hfs_flags & HFS_READ_ONLY) {
+ return 0;
+ }
+
/*
- * We need to allow ENOENT lock errors since unlink
- * systenm call can call VNOP_FSYNC during vclean.
+ * No need to call cp_handle_vnop to resolve fsync(). Any dirty data
+ * should have caused the keys to be unwrapped at the time the data was
+ * put into the UBC, either at mmap/pagein/read-write. If we did manage
+ * to let this by, then strategy will auto-resolve for us.
+ *
+ * We also need to allow ENOENT lock errors since unlink
+ * system call can call VNOP_FSYNC during vclean.
*/
- error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK);
+ error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
if (error)
return (0);
return (error);
}
-/*****************************************************************************
-*
-* VOP Tables
-*
-*****************************************************************************/
-int hfs_vnop_readdirattr(struct vnop_readdirattr_args *); /* in hfs_attrlist.c */
-int hfs_vnop_inactive(struct vnop_inactive_args *); /* in hfs_cnode.c */
-int hfs_vnop_reclaim(struct vnop_reclaim_args *); /* in hfs_cnode.c */
-int hfs_vnop_link(struct vnop_link_args *); /* in hfs_link.c */
-int hfs_vnop_lookup(struct vnop_lookup_args *); /* in hfs_lookup.c */
-int hfs_vnop_search(struct vnop_searchfs_args *); /* in hfs_search.c */
-
-int hfs_vnop_read(struct vnop_read_args *); /* in hfs_readwrite.c */
-int hfs_vnop_write(struct vnop_write_args *); /* in hfs_readwrite.c */
-int hfs_vnop_ioctl(struct vnop_ioctl_args *); /* in hfs_readwrite.c */
-int hfs_vnop_select(struct vnop_select_args *); /* in hfs_readwrite.c */
-int hfs_vnop_strategy(struct vnop_strategy_args *); /* in hfs_readwrite.c */
-int hfs_vnop_allocate(struct vnop_allocate_args *); /* in hfs_readwrite.c */
-int hfs_vnop_pagein(struct vnop_pagein_args *); /* in hfs_readwrite.c */
-int hfs_vnop_pageout(struct vnop_pageout_args *); /* in hfs_readwrite.c */
-int hfs_vnop_bwrite(struct vnop_bwrite_args *); /* in hfs_readwrite.c */
-int hfs_vnop_blktooff(struct vnop_blktooff_args *); /* in hfs_readwrite.c */
-int hfs_vnop_offtoblk(struct vnop_offtoblk_args *); /* in hfs_readwrite.c */
-int hfs_vnop_blockmap(struct vnop_blockmap_args *); /* in hfs_readwrite.c */
-int hfs_vnop_getxattr(struct vnop_getxattr_args *); /* in hfs_xattr.c */
-int hfs_vnop_setxattr(struct vnop_setxattr_args *); /* in hfs_xattr.c */
-int hfs_vnop_removexattr(struct vnop_removexattr_args *); /* in hfs_xattr.c */
-int hfs_vnop_listxattr(struct vnop_listxattr_args *); /* in hfs_xattr.c */
-
int (**hfs_vnodeop_p)(void *);
#define VOPFUNC int (*)(void *)
+
+#if CONFIG_HFS_STD
+int (**hfs_std_vnodeop_p) (void *);
+static int hfs_readonly_op (__unused void* ap) { return (EROFS); }
+
+/*
+ * In 10.6 and forward, HFS Standard is read-only and deprecated. The vnop table below
+ * is for use with HFS standard to block out operations that would modify the file system
+ */
+
+struct vnodeopv_entry_desc hfs_standard_vnodeop_entries[] = {
+ { &vnop_default_desc, (VOPFUNC)vn_default_error },
+ { &vnop_lookup_desc, (VOPFUNC)hfs_vnop_lookup }, /* lookup */
+ { &vnop_create_desc, (VOPFUNC)hfs_readonly_op }, /* create (READONLY) */
+ { &vnop_mknod_desc, (VOPFUNC)hfs_readonly_op }, /* mknod (READONLY) */
+ { &vnop_open_desc, (VOPFUNC)hfs_vnop_open }, /* open */
+ { &vnop_close_desc, (VOPFUNC)hfs_vnop_close }, /* close */
+ { &vnop_getattr_desc, (VOPFUNC)hfs_vnop_getattr }, /* getattr */
+ { &vnop_setattr_desc, (VOPFUNC)hfs_readonly_op }, /* setattr */
+ { &vnop_read_desc, (VOPFUNC)hfs_vnop_read }, /* read */
+ { &vnop_write_desc, (VOPFUNC)hfs_readonly_op }, /* write (READONLY) */
+ { &vnop_ioctl_desc, (VOPFUNC)hfs_vnop_ioctl }, /* ioctl */
+ { &vnop_select_desc, (VOPFUNC)hfs_vnop_select }, /* select */
+ { &vnop_revoke_desc, (VOPFUNC)nop_revoke }, /* revoke */
+ { &vnop_exchange_desc, (VOPFUNC)hfs_readonly_op }, /* exchange (READONLY)*/
+ { &vnop_mmap_desc, (VOPFUNC)err_mmap }, /* mmap */
+ { &vnop_fsync_desc, (VOPFUNC)hfs_readonly_op}, /* fsync (READONLY) */
+ { &vnop_remove_desc, (VOPFUNC)hfs_readonly_op }, /* remove (READONLY) */
+ { &vnop_link_desc, (VOPFUNC)hfs_readonly_op }, /* link ( READONLLY) */
+ { &vnop_rename_desc, (VOPFUNC)hfs_readonly_op }, /* rename (READONLY)*/
+ { &vnop_mkdir_desc, (VOPFUNC)hfs_readonly_op }, /* mkdir (READONLY) */
+ { &vnop_rmdir_desc, (VOPFUNC)hfs_readonly_op }, /* rmdir (READONLY) */
+ { &vnop_symlink_desc, (VOPFUNC)hfs_readonly_op }, /* symlink (READONLY) */
+ { &vnop_readdir_desc, (VOPFUNC)hfs_vnop_readdir }, /* readdir */
+ { &vnop_readdirattr_desc, (VOPFUNC)hfs_vnop_readdirattr }, /* readdirattr */
+ { &vnop_readlink_desc, (VOPFUNC)hfs_vnop_readlink }, /* readlink */
+ { &vnop_inactive_desc, (VOPFUNC)hfs_vnop_inactive }, /* inactive */
+ { &vnop_reclaim_desc, (VOPFUNC)hfs_vnop_reclaim }, /* reclaim */
+ { &vnop_strategy_desc, (VOPFUNC)hfs_vnop_strategy }, /* strategy */
+ { &vnop_pathconf_desc, (VOPFUNC)hfs_vnop_pathconf }, /* pathconf */
+ { &vnop_advlock_desc, (VOPFUNC)err_advlock }, /* advlock */
+ { &vnop_allocate_desc, (VOPFUNC)hfs_readonly_op }, /* allocate (READONLY) */
+#if CONFIG_SEARCHFS
+ { &vnop_searchfs_desc, (VOPFUNC)hfs_vnop_search }, /* search fs */
+#else
+ { &vnop_searchfs_desc, (VOPFUNC)err_searchfs }, /* search fs */
+#endif
+ { &vnop_bwrite_desc, (VOPFUNC)hfs_readonly_op }, /* bwrite (READONLY) */
+ { &vnop_pagein_desc, (VOPFUNC)hfs_vnop_pagein }, /* pagein */
+ { &vnop_pageout_desc,(VOPFUNC) hfs_readonly_op }, /* pageout (READONLY) */
+ { &vnop_copyfile_desc, (VOPFUNC)hfs_readonly_op }, /* copyfile (READONLY)*/
+ { &vnop_blktooff_desc, (VOPFUNC)hfs_vnop_blktooff }, /* blktooff */
+ { &vnop_offtoblk_desc, (VOPFUNC)hfs_vnop_offtoblk }, /* offtoblk */
+ { &vnop_blockmap_desc, (VOPFUNC)hfs_vnop_blockmap }, /* blockmap */
+ { &vnop_getxattr_desc, (VOPFUNC)hfs_vnop_getxattr},
+ { &vnop_setxattr_desc, (VOPFUNC)hfs_readonly_op}, /* set xattr (READONLY) */
+ { &vnop_removexattr_desc, (VOPFUNC)hfs_readonly_op}, /* remove xattr (READONLY) */
+ { &vnop_listxattr_desc, (VOPFUNC)hfs_vnop_listxattr},
+#if NAMEDSTREAMS
+ { &vnop_getnamedstream_desc, (VOPFUNC)hfs_vnop_getnamedstream },
+ { &vnop_makenamedstream_desc, (VOPFUNC)hfs_readonly_op },
+ { &vnop_removenamedstream_desc, (VOPFUNC)hfs_readonly_op },
+#endif
+ { &vnop_getattrlistbulk_desc, (VOPFUNC)hfs_vnop_getattrlistbulk }, /* getattrlistbulk */
+ { NULL, (VOPFUNC)NULL }
+};
+
+struct vnodeopv_desc hfs_std_vnodeop_opv_desc =
+{ &hfs_std_vnodeop_p, hfs_standard_vnodeop_entries };
+#endif
+
+/* VNOP table for HFS+ */
struct vnodeopv_entry_desc hfs_vnodeop_entries[] = {
{ &vnop_default_desc, (VOPFUNC)vn_default_error },
{ &vnop_lookup_desc, (VOPFUNC)hfs_vnop_lookup }, /* lookup */
{ &vnop_select_desc, (VOPFUNC)hfs_vnop_select }, /* select */
{ &vnop_revoke_desc, (VOPFUNC)nop_revoke }, /* revoke */
{ &vnop_exchange_desc, (VOPFUNC)hfs_vnop_exchange }, /* exchange */
- { &vnop_mmap_desc, (VOPFUNC)err_mmap }, /* mmap */
+ { &vnop_mmap_desc, (VOPFUNC)hfs_vnop_mmap }, /* mmap */
{ &vnop_fsync_desc, (VOPFUNC)hfs_vnop_fsync }, /* fsync */
{ &vnop_remove_desc, (VOPFUNC)hfs_vnop_remove }, /* remove */
{ &vnop_link_desc, (VOPFUNC)hfs_vnop_link }, /* link */
{ &vnop_pathconf_desc, (VOPFUNC)hfs_vnop_pathconf }, /* pathconf */
{ &vnop_advlock_desc, (VOPFUNC)err_advlock }, /* advlock */
{ &vnop_allocate_desc, (VOPFUNC)hfs_vnop_allocate }, /* allocate */
+#if CONFIG_SEARCHFS
{ &vnop_searchfs_desc, (VOPFUNC)hfs_vnop_search }, /* search fs */
+#else
+ { &vnop_searchfs_desc, (VOPFUNC)err_searchfs }, /* search fs */
+#endif
{ &vnop_bwrite_desc, (VOPFUNC)hfs_vnop_bwrite }, /* bwrite */
{ &vnop_pagein_desc, (VOPFUNC)hfs_vnop_pagein }, /* pagein */
{ &vnop_pageout_desc,(VOPFUNC) hfs_vnop_pageout }, /* pageout */
{ &vnop_blktooff_desc, (VOPFUNC)hfs_vnop_blktooff }, /* blktooff */
{ &vnop_offtoblk_desc, (VOPFUNC)hfs_vnop_offtoblk }, /* offtoblk */
{ &vnop_blockmap_desc, (VOPFUNC)hfs_vnop_blockmap }, /* blockmap */
- { &vnop_kqfilt_add_desc, (VOPFUNC)hfs_vnop_kqfiltadd }, /* kqfilt_add */
- { &vnop_kqfilt_remove_desc, (VOPFUNC)hfs_vnop_kqfiltremove }, /* kqfilt_remove */
{ &vnop_getxattr_desc, (VOPFUNC)hfs_vnop_getxattr},
{ &vnop_setxattr_desc, (VOPFUNC)hfs_vnop_setxattr},
{ &vnop_removexattr_desc, (VOPFUNC)hfs_vnop_removexattr},
{ &vnop_listxattr_desc, (VOPFUNC)hfs_vnop_listxattr},
+#if NAMEDSTREAMS
+ { &vnop_getnamedstream_desc, (VOPFUNC)hfs_vnop_getnamedstream },
+ { &vnop_makenamedstream_desc, (VOPFUNC)hfs_vnop_makenamedstream },
+ { &vnop_removenamedstream_desc, (VOPFUNC)hfs_vnop_removenamedstream },
+#endif
+ { &vnop_getattrlistbulk_desc, (VOPFUNC)hfs_vnop_getattrlistbulk }, /* getattrlistbulk */
+ { &vnop_mnomap_desc, (VOPFUNC)hfs_vnop_mnomap },
{ NULL, (VOPFUNC)NULL }
};
struct vnodeopv_desc hfs_vnodeop_opv_desc =
{ &hfs_vnodeop_p, hfs_vnodeop_entries };
+
+/* Spec Op vnop table for HFS+ */
int (**hfs_specop_p)(void *);
struct vnodeopv_entry_desc hfs_specop_entries[] = {
{ &vnop_default_desc, (VOPFUNC)vn_default_error },
{ &vnop_bwrite_desc, (VOPFUNC)hfs_vnop_bwrite },
{ &vnop_pagein_desc, (VOPFUNC)hfs_vnop_pagein }, /* Pagein */
{ &vnop_pageout_desc, (VOPFUNC)hfs_vnop_pageout }, /* Pageout */
- { &vnop_copyfile_desc, (VOPFUNC)err_copyfile }, /* copyfile */
+ { &vnop_copyfile_desc, (VOPFUNC)err_copyfile }, /* copyfile */
{ &vnop_blktooff_desc, (VOPFUNC)hfs_vnop_blktooff }, /* blktooff */
{ &vnop_offtoblk_desc, (VOPFUNC)hfs_vnop_offtoblk }, /* offtoblk */
+ { &vnop_getxattr_desc, (VOPFUNC)hfs_vnop_getxattr},
+ { &vnop_setxattr_desc, (VOPFUNC)hfs_vnop_setxattr},
+ { &vnop_removexattr_desc, (VOPFUNC)hfs_vnop_removexattr},
+ { &vnop_listxattr_desc, (VOPFUNC)hfs_vnop_listxattr},
{ (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
};
struct vnodeopv_desc hfs_specop_opv_desc =
{ &hfs_specop_p, hfs_specop_entries };
#if FIFO
+/* HFS+ FIFO VNOP table */
int (**hfs_fifoop_p)(void *);
struct vnodeopv_entry_desc hfs_fifoop_entries[] = {
{ &vnop_default_desc, (VOPFUNC)vn_default_error },
{ &vnop_blktooff_desc, (VOPFUNC)hfs_vnop_blktooff }, /* blktooff */
{ &vnop_offtoblk_desc, (VOPFUNC)hfs_vnop_offtoblk }, /* offtoblk */
{ &vnop_blockmap_desc, (VOPFUNC)hfs_vnop_blockmap }, /* blockmap */
- { &vnop_kqfilt_add_desc, (VOPFUNC)hfsfifo_kqfilt_add }, /* kqfilt_add */
- { &vnop_kqfilt_remove_desc, (VOPFUNC)hfsfifo_kqfilt_remove }, /* kqfilt_remove */
+ { &vnop_getxattr_desc, (VOPFUNC)hfs_vnop_getxattr},
+ { &vnop_setxattr_desc, (VOPFUNC)hfs_vnop_setxattr},
+ { &vnop_removexattr_desc, (VOPFUNC)hfs_vnop_removexattr},
+ { &vnop_listxattr_desc, (VOPFUNC)hfs_vnop_listxattr},
{ (struct vnodeop_desc*)NULL, (VOPFUNC)NULL }
};
struct vnodeopv_desc hfs_fifoop_opv_desc =
projects / apple / xnu.git / blobdiff