/*
- * Copyright (c) 2004-2013 Apple Inc. All rights reserved.
+ * Copyright (c) 2004-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <sys/fsctl.h>
#include <sys/vnode_internal.h>
#include <sys/kauth.h>
+#include <sys/uio_internal.h>
#include "hfs.h"
#include "hfs_cnode.h"
#include "hfs_endian.h"
#include "hfs_btreeio.h"
#include "hfs_fsctl.h"
+#include "hfs_cprotect.h"
#include "hfscommon/headers/BTreesInternal.h"
#define XATTR_EXTENDEDSECURITY_NAME "system.extendedsecurity"
#define XATTR_XATTREXTENTS_NAME "system.xattrextents"
-/* Faster version if we already know this is the data fork. */
-#define RSRC_FORK_EXISTS(CP) \
- (((CP)->c_attr.ca_blocks - (CP)->c_datafork->ff_data.cf_blocks) > 0)
-
static u_int32_t emptyfinfo[8] = {0};
static int hfs_zero_hidden_fields (struct cnode *cp, u_int8_t *finderinfo);
if ((error = hfs_lock(VTOC(vp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
return (error);
}
- if ((!RSRC_FORK_EXISTS(cp)
+ if ((!hfs_has_rsrc(cp)
#if HFS_COMPRESSION
|| hide_rsrc
#endif /* HFS_COMPRESSION */
hfs_unlock(cp);
return (ENOATTR);
}
- error = hfs_vgetrsrc(VTOHFS(vp), vp, svpp, TRUE, FALSE);
+ error = hfs_vgetrsrc(VTOHFS(vp), vp, svpp);
hfs_unlock(cp);
return (error);
if ((error = hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
return (error);
}
- error = hfs_vgetrsrc(VTOHFS(vp), vp, svpp, TRUE, FALSE);
+ error = hfs_vgetrsrc(VTOHFS(vp), vp, svpp);
hfs_unlock(cp);
return (error);
hfs_vnop_removenamedstream(struct vnop_removenamedstream_args* ap)
{
vnode_t svp = ap->a_svp;
- struct cnode *scp;
+ cnode_t *scp = VTOC(svp);
int error = 0;
/*
return (ENOATTR);
}
#if HFS_COMPRESSION
- if (hfs_hides_rsrc(ap->a_context, VTOC(svp), 1)) {
+ if (hfs_hides_rsrc(ap->a_context, scp, 1)) {
/* do nothing */
return 0;
}
#endif /* HFS_COMPRESSION */
-
- scp = VTOC(svp);
- /* Take truncate lock before taking cnode lock. */
hfs_lock_truncate(scp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
- if ((error = hfs_lock(scp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
- goto out;
+ if (VTOF(svp)->ff_size) {
+ // hfs_truncate will deal with the cnode lock
+ error = hfs_truncate(svp, 0, IO_NDELAY, 0, ap->a_context);
}
- if (VTOF(svp)->ff_size != 0) {
- error = hfs_truncate(svp, 0, IO_NDELAY, 0, 0, ap->a_context);
- }
- hfs_unlock(scp);
-out:
hfs_unlock_truncate(scp, HFS_LOCK_DEFAULT);
- return (error);
+
+ return error;
}
#endif
if (S_ISREG(cp->c_attr.ca_mode) || S_ISLNK(cp->c_attr.ca_mode)) {
struct FndrExtendedFileInfo *extinfo = (struct FndrExtendedFileInfo *)finfo;
+ extinfo->document_id = 0;
extinfo->date_added = 0;
extinfo->write_gen_counter = 0;
} else if (S_ISDIR(cp->c_attr.ca_mode)) {
struct FndrExtendedDirInfo *extinfo = (struct FndrExtendedDirInfo *)finfo;
+ extinfo->document_id = 0;
extinfo->date_added = 0;
+ extinfo->write_gen_counter = 0;
} else {
/* Return an error */
return -1;
}
namelen = cp->c_desc.cd_namelen;
- if ( !RSRC_FORK_EXISTS(cp)) {
+ if (!hfs_has_rsrc(cp)) {
hfs_unlock(cp);
return (ENOATTR);
}
openunlinked = 1;
}
- result = hfs_vgetrsrc(hfsmp, vp, &rvp, TRUE, FALSE);
+ result = hfs_vgetrsrc(hfsmp, vp, &rvp);
hfs_unlock(cp);
if (result) {
return (result);
return MacToVFSError(result);
}
+// Has same limitations as hfs_getxattr_internal below
+int hfs_xattr_read(vnode_t vp, const char *name, void *data, size_t *size)
+{
+ char uio_buf[UIO_SIZEOF(1)];
+ uio_t uio = uio_createwithbuffer(1, 0, UIO_SYSSPACE, UIO_READ, uio_buf,
+ sizeof(uio_buf));
+
+ uio_addiov(uio, CAST_USER_ADDR_T(data), *size);
+ struct vnop_getxattr_args args = {
+ .a_uio = uio,
+ .a_name = name,
+ .a_size = size
+ };
+
+ return hfs_getxattr_internal(VTOC(vp), &args, VTOHFS(vp), 0);
+}
/*
* getxattr_internal
btdata.bufferAddress = recp;
btdata.itemSize = sizeof(HFSPlusAttrRecord);
btdata.itemCount = 1;
-
+
result = hfs_buildattrkey(target_id, ap->a_name, (HFSPlusAttrKey *)&iterator->key);
if (result) {
goto exit;
u_int16_t fdFlags;
u_int32_t dateadded = 0;
u_int32_t write_gen_counter = 0;
+ u_int32_t document_id = 0;
attrsize = sizeof(VTOC(vp)->c_finderinfo);
/* Grab the current date added from the cnode */
dateadded = hfs_get_dateadded (cp);
if (S_ISREG(cp->c_attr.ca_mode) || S_ISLNK(cp->c_attr.ca_mode)) {
- write_gen_counter = hfs_get_gencount(cp);
+ struct FndrExtendedFileInfo *extinfo = (struct FndrExtendedFileInfo *)((u_int8_t*)cp->c_finderinfo + 16);
+ /*
+ * Grab generation counter directly from the cnode
+ * instead of calling hfs_get_gencount(), because
+ * for zero generation count values hfs_get_gencount()
+ * lies and bumps it up to one.
+ */
+ write_gen_counter = extinfo->write_gen_counter;
+ document_id = extinfo->document_id;
+ } else if (S_ISDIR(cp->c_attr.ca_mode)) {
+ struct FndrExtendedDirInfo *extinfo = (struct FndrExtendedDirInfo *)((u_int8_t*)cp->c_finderinfo + 16);
+ write_gen_counter = extinfo->write_gen_counter;
+ document_id = extinfo->document_id;
}
- /* Zero out the date added field to ignore user's attempts to set it */
+ /*
+ * Zero out the finder info's reserved fields like date added,
+ * generation counter, and document id to ignore user's attempts
+ * to set it
+ */
hfs_zero_hidden_fields(cp, finderinfo);
if (bcmp(finderinfo_start, emptyfinfo, attrsize)) {
}
/*
- * Now restore the date added to the finderinfo to be written out.
- * Advance to the 2nd half of the finderinfo to write out the date added
- * into the buffer.
+ * Now restore the date added and other reserved fields to the finderinfo to
+ * be written out. Advance to the 2nd half of the finderinfo to write them
+ * out into the buffer.
*
* Make sure to endian swap the date added back into big endian. When we used
* hfs_get_dateadded above to retrieve it, it swapped into local endianness
* for us. But now that we're writing it out, put it back into big endian.
*/
finfo = &finderinfo[16];
-
if (S_ISREG(cp->c_attr.ca_mode) || S_ISLNK(cp->c_attr.ca_mode)) {
struct FndrExtendedFileInfo *extinfo = (struct FndrExtendedFileInfo *)finfo;
extinfo->date_added = OSSwapHostToBigInt32(dateadded);
extinfo->write_gen_counter = write_gen_counter;
+ extinfo->document_id = document_id;
} else if (S_ISDIR(cp->c_attr.ca_mode)) {
struct FndrExtendedDirInfo *extinfo = (struct FndrExtendedDirInfo *)finfo;
extinfo->date_added = OSSwapHostToBigInt32(dateadded);
+ extinfo->write_gen_counter = write_gen_counter;
+ extinfo->document_id = document_id;
}
/* Set the cnode's Finder Info. */
cp->c_bsdflags &= ~UF_HIDDEN;
}
- result = hfs_update(vp, FALSE);
+ result = hfs_update(vp, 0);
hfs_unlock(cp);
return (result);
cp = VTOC(vp);
namelen = cp->c_desc.cd_namelen;
- if (RSRC_FORK_EXISTS(cp)) {
+ if (hfs_has_rsrc(cp)) {
/* attr exists and "create" was specified. */
if (ap->a_options & XATTR_CREATE) {
hfs_unlock(cp);
openunlinked = 1;
}
- result = hfs_vgetrsrc(hfsmp, vp, &rvp, TRUE, FALSE);
+ result = hfs_vgetrsrc(hfsmp, vp, &rvp);
hfs_unlock(cp);
if (result) {
return (result);
return (result == btNotFound ? ENOATTR : MacToVFSError(result));
}
+// Has same limitations as hfs_setxattr_internal below
+int hfs_xattr_write(vnode_t vp, const char *name, const void *data, size_t size)
+{
+ struct vnop_setxattr_args args = {
+ .a_vp = vp,
+ .a_name = name,
+ };
+
+ return hfs_setxattr_internal(VTOC(vp), data, size, &args, VTOHFS(vp), 0);
+}
/*
* hfs_setxattr_internal
* 3. If data originates entirely in-kernel, use a null UIO, and ensure the size is less than
* hfsmp->hfs_max_inline_attrsize bytes long.
*/
-int hfs_setxattr_internal (struct cnode *cp, caddr_t data_ptr, size_t attrsize,
+int hfs_setxattr_internal (struct cnode *cp, const void *data_ptr, size_t attrsize,
struct vnop_setxattr_args *ap, struct hfsmount *hfsmp,
u_int32_t fileid)
{
int exists = 0;
int allocatedblks = 0;
u_int32_t target_id;
- int takelock = 1;
if (cp) {
target_id = cp->c_fileid;
} else {
target_id = fileid;
- if (target_id != 1) {
- /*
- * If we are manipulating something other than
- * the root folder (id 1), and do not have a cnode-in-hand,
- * then we must already hold the requisite b-tree locks from
- * earlier up the call stack. (See hfs_makenode)
- */
- takelock = 0;
- }
}
/* Start a transaction for our changes. */
hfsmp->hfs_max_inline_attrsize = getmaxinlineattrsize(hfsmp->hfs_attribute_vp);
}
- if (takelock) {
- /* Take exclusive access to the attributes b-tree. */
- lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
- }
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_EXCLUSIVE_LOCK);
/* Build the b-tree key. */
MALLOC(iterator, BTreeIterator *, sizeof(*iterator), M_TEMP, M_WAITOK);
if (btfile && started_transaction) {
(void) BTFlushPath(btfile);
}
- if (lockflags) {
- hfs_systemfile_unlock(hfsmp, lockflags);
- }
+ hfs_systemfile_unlock(hfsmp, lockflags);
if (result == 0) {
if (vp) {
cp = VTOC(vp);
* modified time of the file.
*/
cp->c_touch_chgtime = TRUE;
+ cp->c_flag |= C_MODIFIED;
cp->c_attr.ca_recflags |= kHFSHasAttributesMask;
if ((bcmp(ap->a_name, KAUTH_FILESEC_XATTR, sizeof(KAUTH_FILESEC_XATTR)) == 0)) {
cp->c_attr.ca_recflags |= kHFSHasSecurityMask;
if ((result = hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
return (result);
}
- if ( !RSRC_FORK_EXISTS(cp)) {
+ if (!hfs_has_rsrc(cp)) {
hfs_unlock(cp);
return (ENOATTR);
}
- result = hfs_vgetrsrc(hfsmp, vp, &rvp, TRUE, FALSE);
+ result = hfs_vgetrsrc(hfsmp, vp, &rvp);
hfs_unlock(cp);
if (result) {
return (result);
}
hfs_lock_truncate(VTOC(rvp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT);
+
+ // Tell UBC now before we take the cnode lock and start the transaction
+ hfs_ubc_setsize(rvp, 0, false);
+
if ((result = hfs_lock(VTOC(rvp), HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
hfs_unlock_truncate(cp, HFS_LOCK_DEFAULT);
vnode_put(rvp);
return (result);
}
- result = hfs_truncate(rvp, (off_t)0, IO_NDELAY, 0, 0, ap->a_context);
+ result = hfs_truncate(rvp, (off_t)0, IO_NDELAY, 0, ap->a_context);
if (result == 0) {
cp->c_touch_chgtime = TRUE;
cp->c_flag |= C_MODIFIED;
- result = hfs_update(vp, FALSE);
+ result = hfs_update(vp, 0);
}
hfs_end_transaction(hfsmp);
void * finderinfo_start;
int finderinfo_size;
u_int8_t finderinfo[32];
- u_int32_t date_added, write_gen_counter;
+ u_int32_t date_added, write_gen_counter, document_id;
u_int8_t *finfo = NULL;
if ((result = hfs_lock(cp, HFS_EXCLUSIVE_LOCK, HFS_LOCK_DEFAULT))) {
struct FndrExtendedFileInfo *extinfo = (struct FndrExtendedFileInfo *)finfo;
date_added = extinfo->date_added;
write_gen_counter = extinfo->write_gen_counter;
+ document_id = extinfo->document_id;
} else if (S_ISDIR(cp->c_attr.ca_mode)) {
struct FndrExtendedDirInfo *extinfo = (struct FndrExtendedDirInfo *)finfo;
date_added = extinfo->date_added;
+ write_gen_counter = extinfo->write_gen_counter;
+ document_id = extinfo->document_id;
}
if (vnode_islnk(vp)) {
struct FndrExtendedFileInfo *extinfo = (struct FndrExtendedFileInfo *)finfo;
extinfo->date_added = date_added;
extinfo->write_gen_counter = write_gen_counter;
+ extinfo->document_id = document_id;
} else if (S_ISDIR(cp->c_attr.ca_mode)) {
struct FndrExtendedDirInfo *extinfo = (struct FndrExtendedDirInfo *)finfo;
extinfo->date_added = date_added;
+ extinfo->write_gen_counter = write_gen_counter;
+ extinfo->document_id = document_id;
}
/* Updating finderInfo updates change time and modified time */
cp->c_touch_chgtime = TRUE;
cp->c_flag |= C_MODIFIED;
- hfs_update(vp, FALSE);
+ hfs_update(vp, 0);
hfs_unlock(cp);
result = file_attribute_exist(hfsmp, cp->c_fileid);
if (result == 0) {
cp->c_attr.ca_recflags &= ~kHFSHasAttributesMask;
+ cp->c_flag |= C_MODIFIED;
}
if (result == EEXIST) {
result = 0;
/* If ACL was removed, clear security bit */
if ((bcmp(ap->a_name, KAUTH_FILESEC_XATTR, sizeof(KAUTH_FILESEC_XATTR)) == 0)) {
cp->c_attr.ca_recflags &= ~kHFSHasSecurityMask;
+ cp->c_flag |= C_MODIFIED;
}
(void) hfs_update(vp, 0);
}
}
}
/* If Resource Fork is non-empty then export it's name. */
- if (S_ISREG(cp->c_mode) && RSRC_FORK_EXISTS(cp)) {
+ if (S_ISREG(cp->c_mode) && hfs_has_rsrc(cp)) {
#if HFS_COMPRESSION
if ((ap->a_options & XATTR_SHOWCOMPRESSION) ||
!compressed ||
- !hfs_hides_rsrc(ap->a_context, VTOC(vp), 1) /* 1 == don't take the cnode lock */
+ !decmpfs_hides_rsrc(ap->a_context, VTOCMP(vp))
)
#endif /* HFS_COMPRESSION */
{
return (1); /* continue */
#if HFS_COMPRESSION
- if (!state->showcompressed && hfs_hides_xattr(state->ctx, VTOC(state->vp), attrname, 1) ) /* 1 == don't take the cnode lock */
+ if (!state->showcompressed && decmpfs_hides_xattr(state->ctx, VTOCMP(state->vp), attrname) )
return 1; /* continue */
#endif /* HFS_COMPRESSION */
*
* This function takes the necessary locks on the attribute
* b-tree file and the allocation (bitmap) file.
+ *
+ * NOTE: Upon sucecss, this function will return with an open
+ * transaction. The reason we do it this way is because when we
+ * delete the last attribute, we must make sure the flag in the
+ * catalog record that indicates there are no more records is cleared.
+ * The caller is responsible for doing this and *must* do it before
+ * ending the transaction.
*/
int
-hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid)
+hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid,
+ bool *open_transaction)
{
BTreeIterator *iterator = NULL;
HFSPlusAttrKey *key;
struct filefork *btfile;
- int result, lockflags;
+ int result, lockflags = 0;
+
+ *open_transaction = false;
+
+ if (hfsmp->hfs_attribute_vp == NULL)
+ return 0;
- if (hfsmp->hfs_attribute_vp == NULL) {
- return (0);
- }
btfile = VTOF(hfsmp->hfs_attribute_vp);
MALLOC(iterator, BTreeIterator *, sizeof(BTreeIterator), M_TEMP, M_WAITOK);
key = (HFSPlusAttrKey *)&iterator->key;
/* Loop until there are no more attributes for this file id */
- for(;;) {
+ do {
+ if (!*open_transaction)
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE, HFS_SHARED_LOCK);
+
+ (void) hfs_buildattrkey(fileid, NULL, key);
+ result = BTIterateRecord(btfile, kBTreeNextRecord, iterator, NULL, NULL);
+ if (result || key->fileID != fileid)
+ goto exit;
+
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ lockflags = 0;
+
+ if (*open_transaction) {
+ hfs_end_transaction(hfsmp);
+ *open_transaction = false;
+ }
+
if (hfs_start_transaction(hfsmp) != 0) {
result = EINVAL;
goto exit;
}
- /* Lock the attribute b-tree and the allocation (bitmap) files */
+ *open_transaction = true;
+
lockflags = hfs_systemfile_lock(hfsmp, SFL_ATTRIBUTE | SFL_BITMAP, HFS_EXCLUSIVE_LOCK);
- /*
- * Go to first possible attribute key/record pair
- */
- (void) hfs_buildattrkey(fileid, NULL, key);
- result = BTIterateRecord(btfile, kBTreeNextRecord, iterator, NULL, NULL);
- if (result || key->fileID != fileid) {
- hfs_systemfile_unlock(hfsmp, lockflags);
- hfs_end_transaction(hfsmp);
- goto exit;
- }
result = remove_attribute_records(hfsmp, iterator);
#if HFS_XATTR_VERBOSE
printf("hfs_removeallattr: unexpected err %d\n", result);
}
#endif
+ } while (!result);
+
+exit:
+ FREE(iterator, M_TEMP);
+
+ if (lockflags)
hfs_systemfile_unlock(hfsmp, lockflags);
+
+ result = result == btNotFound ? 0 : MacToVFSError(result);
+
+ if (result && *open_transaction) {
hfs_end_transaction(hfsmp);
- if (result)
- break;
+ *open_transaction = false;
}
-exit:
- FREE(iterator, M_TEMP);
- return (result == btNotFound ? 0: MacToVFSError(result));
+
+ return result;
}
__private_extern__
}
return (blocks);
}
+
projects / apple / xnu.git / blobdiff