/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2009 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <sys/malloc.h>
#include <sys/stat.h>
#include <sys/mount.h>
+#include <sys/mount_internal.h>
#include <sys/buf.h>
+#include <sys/buf_internal.h>
#include <sys/ubc.h>
#include <sys/unistd.h>
#include <sys/utfconv.h>
#include <sys/kauth.h>
+#include <sys/fcntl.h>
+#include <sys/vnode_internal.h>
+#include <kern/clock.h>
+
+#include <libkern/OSAtomic.h>
#include "hfs.h"
#include "hfs_catalog.h"
#include "hfs_mount.h"
#include "hfs_endian.h"
#include "hfs_cnode.h"
+#include "hfs_fsctl.h"
#include "hfscommon/headers/FileMgrInternal.h"
#include "hfscommon/headers/BTreesInternal.h"
#include "hfscommon/headers/HFSUnicodeWrappers.h"
-
-extern int count_lock_queue(void);
-
-
static void ReleaseMetaFileVNode(struct vnode *vp);
static int hfs_late_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp, void *_args);
static u_int32_t hfs_hotfile_freeblocks(struct hfsmount *);
-
-u_int32_t GetLogicalBlockSize(struct vnode *vp);
-
-extern int hfs_attrkeycompare(HFSPlusAttrKey *searchKey, HFSPlusAttrKey *trialKey);
-
-
//*******************************************************************************
// Note: Finder information in the HFS/HFS+ metadata are considered opaque and
// hence are not in the right byte order on little endian machines. It is
//
//
//*******************************************************************************
-char hfs_catname[] = "Catalog B-tree";
-char hfs_extname[] = "Extents B-tree";
-char hfs_vbmname[] = "Volume Bitmap";
-char hfs_attrname[] = "Attribute B-tree";
+unsigned char hfs_catname[] = "Catalog B-tree";
+unsigned char hfs_extname[] = "Extents B-tree";
+unsigned char hfs_vbmname[] = "Volume Bitmap";
+unsigned char hfs_attrname[] = "Attribute B-tree";
+unsigned char hfs_startupname[] = "Startup File";
-char hfs_privdirname[] =
- "\xE2\x90\x80\xE2\x90\x80\xE2\x90\x80\xE2\x90\x80HFS+ Private Data";
__private_extern__
OSErr hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
- struct proc *p)
+ __unused struct proc *p)
{
ExtendedVCB *vcb = HFSTOVCB(hfsmp);
int error;
vcb->vcbVBMSt = SWAP_BE16 (mdb->drVBMSt);
vcb->nextAllocation = SWAP_BE16 (mdb->drAllocPtr);
vcb->totalBlocks = SWAP_BE16 (mdb->drNmAlBlks);
+ vcb->allocLimit = vcb->totalBlocks;
vcb->blockSize = SWAP_BE32 (mdb->drAlBlkSiz);
vcb->vcbClpSiz = SWAP_BE32 (mdb->drClpSiz);
vcb->vcbAlBlSt = SWAP_BE16 (mdb->drAlBlSt);
if (error || (utf8chars == 0))
(void) mac_roman_to_utf8(mdb->drVN, NAME_MAX, &utf8chars, vcb->vcbVN);
- hfsmp->hfs_logBlockSize = BestBlockSizeFit(vcb->blockSize, MAXBSIZE, hfsmp->hfs_phys_block_size);
+ hfsmp->hfs_logBlockSize = BestBlockSizeFit(vcb->blockSize, MAXBSIZE, hfsmp->hfs_logical_block_size);
vcb->vcbVBMIOSize = kHFSBlockSize;
- hfsmp->hfs_alt_id_sector = HFS_ALT_SECTOR(hfsmp->hfs_phys_block_size,
- hfsmp->hfs_phys_block_count);
+ hfsmp->hfs_alt_id_sector = HFS_ALT_SECTOR(hfsmp->hfs_logical_block_size,
+ hfsmp->hfs_logical_block_count);
bzero(&cndesc, sizeof(cndesc));
cndesc.cd_parentcnid = kHFSRootParentID;
cndesc.cd_flags |= CD_ISMETA;
bzero(&cnattr, sizeof(cnattr));
- cnattr.ca_nlink = 1;
+ cnattr.ca_linkcount = 1;
cnattr.ca_mode = S_IFREG;
bzero(&fork, sizeof(fork));
* Set up Extents B-tree vnode
*/
cndesc.cd_nameptr = hfs_extname;
- cndesc.cd_namelen = strlen(hfs_extname);
+ cndesc.cd_namelen = strlen((char *)hfs_extname);
cndesc.cd_cnid = cnattr.ca_fileid = kHFSExtentsFileID;
fork.cf_size = SWAP_BE32(mdb->drXTFlSize);
fork.cf_blocks = fork.cf_size / vcb->blockSize;
hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto MtVolErr;
}
+ hfsmp->hfs_extents_cp = VTOC(hfsmp->hfs_extents_vp);
/*
* Set up Catalog B-tree vnode...
*/
cndesc.cd_nameptr = hfs_catname;
- cndesc.cd_namelen = strlen(hfs_catname);
+ cndesc.cd_namelen = strlen((char *)hfs_catname);
cndesc.cd_cnid = cnattr.ca_fileid = kHFSCatalogFileID;
fork.cf_size = SWAP_BE32(mdb->drCTFlSize);
fork.cf_blocks = fork.cf_size / vcb->blockSize;
hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto MtVolErr;
}
+ hfsmp->hfs_catalog_cp = VTOC(hfsmp->hfs_catalog_vp);
/*
* Set up dummy Allocation file vnode (used only for locking bitmap)
*/
cndesc.cd_nameptr = hfs_vbmname;
- cndesc.cd_namelen = strlen(hfs_vbmname);
+ cndesc.cd_namelen = strlen((char *)hfs_vbmname);
cndesc.cd_cnid = cnattr.ca_fileid = kHFSAllocationFileID;
bzero(&fork, sizeof(fork));
cnattr.ca_blocks = 0;
hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto MtVolErr;
}
+ hfsmp->hfs_allocation_cp = VTOC(hfsmp->hfs_allocation_vp);
/* mark the volume dirty (clear clean unmount bit) */
vcb->vcbAtrb &= ~kHFSVolumeUnmountedMask;
- /*
- * all done with system files so we can unlock now...
- */
- hfs_unlock(VTOC(hfsmp->hfs_allocation_vp));
- hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
-
- if (error == noErr)
- {
- error = cat_idlookup(hfsmp, kHFSRootFolderID, NULL, NULL, NULL);
- }
+ if (error == noErr)
+ {
+ error = cat_idlookup(hfsmp, kHFSRootFolderID, 0, NULL, NULL, NULL);
+ }
if ( error == noErr )
{
MarkVCBDirty( vcb ); // mark VCB dirty so it will be written
}
}
+
+ /*
+ * all done with system files so we can unlock now...
+ */
+ hfs_unlock(VTOC(hfsmp->hfs_allocation_vp));
+ hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
+ hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
+
goto CmdDone;
//-- Release any resources allocated so far before exiting with an error:
__private_extern__
OSErr hfs_MountHFSPlusVolume(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
- off_t embeddedOffset, u_int64_t disksize, struct proc *p, void *args, kauth_cred_t cred)
+ off_t embeddedOffset, u_int64_t disksize, __unused struct proc *p, void *args, kauth_cred_t cred)
{
register ExtendedVCB *vcb;
struct cat_desc cndesc;
struct cat_attr cnattr;
struct cat_fork cfork;
- UInt32 blockSize;
+ u_int32_t blockSize;
daddr64_t spare_sectors;
struct BTreeInfoRec btinfo;
u_int16_t signature;
- u_int16_t version;
+ u_int16_t hfs_version;
int i;
OSErr retval;
signature = SWAP_BE16(vhp->signature);
- version = SWAP_BE16(vhp->version);
+ hfs_version = SWAP_BE16(vhp->version);
if (signature == kHFSPlusSigWord) {
- if (version != kHFSPlusVersion) {
- printf("hfs_mount: invalid HFS+ version: %d\n", version);
+ if (hfs_version != kHFSPlusVersion) {
+ printf("hfs_mount: invalid HFS+ version: %d\n", hfs_version);
return (EINVAL);
}
} else if (signature == kHFSXSigWord) {
- if (version != kHFSXVersion) {
- printf("hfs_mount: invalid HFSX version: %d\n", version);
+ if (hfs_version != kHFSXVersion) {
+ printf("hfs_mount: invalid HFSX version: %d\n", hfs_version);
return (EINVAL);
}
/* The in-memory signature is always 'H+'. */
return (EINVAL);
/* Make sure we can live with the physical block size. */
- if ((disksize & (hfsmp->hfs_phys_block_size - 1)) ||
- (embeddedOffset & (hfsmp->hfs_phys_block_size - 1)) ||
- (blockSize < hfsmp->hfs_phys_block_size)) {
+ if ((disksize & (hfsmp->hfs_logical_block_size - 1)) ||
+ (embeddedOffset & (hfsmp->hfs_logical_block_size - 1)) ||
+ (blockSize < hfsmp->hfs_logical_block_size)) {
return (ENXIO);
}
+
+ /* If allocation block size is less than the physical
+ * block size, we assume that the physical block size
+ * is same as logical block size. The physical block
+ * size value is used to round down the offsets for
+ * reading and writing the primary and alternate volume
+ * headers at physical block boundary and will cause
+ * problems if it is less than the block size.
+ */
+ if (blockSize < hfsmp->hfs_physical_block_size) {
+ hfsmp->hfs_physical_block_size = hfsmp->hfs_logical_block_size;
+ hfsmp->hfs_log_per_phys = 1;
+ }
+
/*
* The VolumeHeader seems OK: transfer info from it into VCB
* Note - the VCB starts out clear (all zeros)
/* Now fill in the Extended VCB info */
vcb->nextAllocation = SWAP_BE32(vhp->nextAllocation);
vcb->totalBlocks = SWAP_BE32(vhp->totalBlocks);
+ vcb->allocLimit = vcb->totalBlocks;
vcb->freeBlocks = SWAP_BE32(vhp->freeBlocks);
vcb->blockSize = blockSize;
vcb->encodingsBitmap = SWAP_BE64(vhp->encodingsBitmap);
* (currently set up from the wrapper MDB) using the
* new blocksize value:
*/
- hfsmp->hfs_logBlockSize = BestBlockSizeFit(vcb->blockSize, MAXBSIZE, hfsmp->hfs_phys_block_size);
+ hfsmp->hfs_logBlockSize = BestBlockSizeFit(vcb->blockSize, MAXBSIZE, hfsmp->hfs_logical_block_size);
vcb->vcbVBMIOSize = min(vcb->blockSize, MAXPHYSIO);
/*
* Validate and initialize the location of the alternate volume header.
*/
- spare_sectors = hfsmp->hfs_phys_block_count -
+ spare_sectors = hfsmp->hfs_logical_block_count -
(((daddr64_t)vcb->totalBlocks * blockSize) /
- hfsmp->hfs_phys_block_size);
+ hfsmp->hfs_logical_block_size);
- if (spare_sectors > (blockSize / hfsmp->hfs_phys_block_size)) {
+ if (spare_sectors > (daddr64_t)(blockSize / hfsmp->hfs_logical_block_size)) {
hfsmp->hfs_alt_id_sector = 0; /* partition has grown! */
} else {
- hfsmp->hfs_alt_id_sector = (hfsmp->hfsPlusIOPosOffset / hfsmp->hfs_phys_block_size) +
- HFS_ALT_SECTOR(hfsmp->hfs_phys_block_size,
- hfsmp->hfs_phys_block_count);
+ hfsmp->hfs_alt_id_sector = (hfsmp->hfsPlusIOPosOffset / hfsmp->hfs_logical_block_size) +
+ HFS_ALT_SECTOR(hfsmp->hfs_logical_block_size,
+ hfsmp->hfs_logical_block_count);
}
bzero(&cndesc, sizeof(cndesc));
cndesc.cd_parentcnid = kHFSRootParentID;
cndesc.cd_flags |= CD_ISMETA;
bzero(&cnattr, sizeof(cnattr));
- cnattr.ca_nlink = 1;
+ cnattr.ca_linkcount = 1;
cnattr.ca_mode = S_IFREG;
/*
* Set up Extents B-tree vnode
*/
cndesc.cd_nameptr = hfs_extname;
- cndesc.cd_namelen = strlen(hfs_extname);
+ cndesc.cd_namelen = strlen((char *)hfs_extname);
cndesc.cd_cnid = cnattr.ca_fileid = kHFSExtentsFileID;
cfork.cf_size = SWAP_BE64 (vhp->extentsFile.logicalSize);
+ cfork.cf_new_size= 0;
cfork.cf_clump = SWAP_BE32 (vhp->extentsFile.clumpSize);
cfork.cf_blocks = SWAP_BE32 (vhp->extentsFile.totalBlocks);
cfork.cf_vblocks = 0;
}
retval = hfs_getnewvnode(hfsmp, NULL, NULL, &cndesc, 0, &cnattr, &cfork,
&hfsmp->hfs_extents_vp);
+ if (retval)
+ {
+ goto ErrorExit;
+ }
+ hfsmp->hfs_extents_cp = VTOC(hfsmp->hfs_extents_vp);
+ hfs_unlock(hfsmp->hfs_extents_cp);
- if (retval) goto ErrorExit;
retval = MacToVFSError(BTOpenPath(VTOF(hfsmp->hfs_extents_vp),
(KeyCompareProcPtr) CompareExtentKeysPlus));
- if (retval) {
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
+ if (retval)
+ {
goto ErrorExit;
}
-
/*
* Set up Catalog B-tree vnode
*/
cndesc.cd_nameptr = hfs_catname;
- cndesc.cd_namelen = strlen(hfs_catname);
+ cndesc.cd_namelen = strlen((char *)hfs_catname);
cndesc.cd_cnid = cnattr.ca_fileid = kHFSCatalogFileID;
cfork.cf_size = SWAP_BE64 (vhp->catalogFile.logicalSize);
retval = hfs_getnewvnode(hfsmp, NULL, NULL, &cndesc, 0, &cnattr, &cfork,
&hfsmp->hfs_catalog_vp);
if (retval) {
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto ErrorExit;
}
+ hfsmp->hfs_catalog_cp = VTOC(hfsmp->hfs_catalog_vp);
+ hfs_unlock(hfsmp->hfs_catalog_cp);
+
retval = MacToVFSError(BTOpenPath(VTOF(hfsmp->hfs_catalog_vp),
(KeyCompareProcPtr) CompareExtendedCatalogKeys));
if (retval) {
- hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto ErrorExit;
}
if ((hfsmp->hfs_flags & HFS_X) &&
* Set up Allocation file vnode
*/
cndesc.cd_nameptr = hfs_vbmname;
- cndesc.cd_namelen = strlen(hfs_vbmname);
+ cndesc.cd_namelen = strlen((char *)hfs_vbmname);
cndesc.cd_cnid = cnattr.ca_fileid = kHFSAllocationFileID;
cfork.cf_size = SWAP_BE64 (vhp->allocationFile.logicalSize);
retval = hfs_getnewvnode(hfsmp, NULL, NULL, &cndesc, 0, &cnattr, &cfork,
&hfsmp->hfs_allocation_vp);
if (retval) {
- hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto ErrorExit;
}
+ hfsmp->hfs_allocation_cp = VTOC(hfsmp->hfs_allocation_vp);
+ hfs_unlock(hfsmp->hfs_allocation_cp);
/*
* Set up Attribute B-tree vnode
*/
if (vhp->attributesFile.totalBlocks != 0) {
cndesc.cd_nameptr = hfs_attrname;
- cndesc.cd_namelen = strlen(hfs_attrname);
+ cndesc.cd_namelen = strlen((char *)hfs_attrname);
cndesc.cd_cnid = cnattr.ca_fileid = kHFSAttributesFileID;
cfork.cf_size = SWAP_BE64 (vhp->attributesFile.logicalSize);
retval = hfs_getnewvnode(hfsmp, NULL, NULL, &cndesc, 0, &cnattr, &cfork,
&hfsmp->hfs_attribute_vp);
if (retval) {
- hfs_unlock(VTOC(hfsmp->hfs_allocation_vp));
- hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto ErrorExit;
}
+ hfsmp->hfs_attribute_cp = VTOC(hfsmp->hfs_attribute_vp);
+ hfs_unlock(hfsmp->hfs_attribute_cp);
retval = MacToVFSError(BTOpenPath(VTOF(hfsmp->hfs_attribute_vp),
(KeyCompareProcPtr) hfs_attrkeycompare));
if (retval) {
- hfs_unlock(VTOC(hfsmp->hfs_attribute_vp));
- hfs_unlock(VTOC(hfsmp->hfs_allocation_vp));
- hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto ErrorExit;
}
}
-
+ /*
+ * Set up Startup file vnode
+ */
+ if (vhp->startupFile.totalBlocks != 0) {
+ cndesc.cd_nameptr = hfs_startupname;
+ cndesc.cd_namelen = strlen((char *)hfs_startupname);
+ cndesc.cd_cnid = cnattr.ca_fileid = kHFSStartupFileID;
+
+ cfork.cf_size = SWAP_BE64 (vhp->startupFile.logicalSize);
+ cfork.cf_clump = SWAP_BE32 (vhp->startupFile.clumpSize);
+ cfork.cf_blocks = SWAP_BE32 (vhp->startupFile.totalBlocks);
+ cfork.cf_vblocks = 0;
+ cnattr.ca_blocks = cfork.cf_blocks;
+ for (i = 0; i < kHFSPlusExtentDensity; i++) {
+ cfork.cf_extents[i].startBlock =
+ SWAP_BE32 (vhp->startupFile.extents[i].startBlock);
+ cfork.cf_extents[i].blockCount =
+ SWAP_BE32 (vhp->startupFile.extents[i].blockCount);
+ }
+ retval = hfs_getnewvnode(hfsmp, NULL, NULL, &cndesc, 0, &cnattr, &cfork,
+ &hfsmp->hfs_startup_vp);
+ if (retval) {
+ goto ErrorExit;
+ }
+ hfsmp->hfs_startup_cp = VTOC(hfsmp->hfs_startup_vp);
+ hfs_unlock(hfsmp->hfs_startup_cp);
+ }
+
/* Pick up volume name and create date */
- retval = cat_idlookup(hfsmp, kHFSRootFolderID, &cndesc, &cnattr, NULL);
+ retval = cat_idlookup(hfsmp, kHFSRootFolderID, 0, &cndesc, &cnattr, NULL);
if (retval) {
- if (hfsmp->hfs_attribute_vp)
- hfs_unlock(VTOC(hfsmp->hfs_attribute_vp));
- hfs_unlock(VTOC(hfsmp->hfs_allocation_vp));
- hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
goto ErrorExit;
}
vcb->vcbCrDate = cnattr.ca_itime;
hfs_flushvolumeheader(hfsmp, TRUE, 0);
}
- /*
- * all done with metadata files so we can unlock now...
- */
- if (hfsmp->hfs_attribute_vp)
- hfs_unlock(VTOC(hfsmp->hfs_attribute_vp));
- hfs_unlock(VTOC(hfsmp->hfs_allocation_vp));
- hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
+ /* kHFSHasFolderCount is only supported/updated on HFSX volumes */
+ if ((hfsmp->hfs_flags & HFS_X) != 0) {
+ hfsmp->hfs_flags |= HFS_FOLDERCOUNT;
+ }
//
// Check if we need to do late journal initialization. This only
//
if ( (vcb->vcbAtrb & kHFSVolumeJournaledMask)
&& (SWAP_BE32(vhp->lastMountedVersion) != kHFSJMountVersion)
- && (hfsmp->jnl == NULL)) {
+ && (hfsmp->jnl == NULL)) {
retval = hfs_late_journal_init(hfsmp, vhp, args);
if (retval != 0) {
+ if (retval == EROFS) {
+ // EROFS is a special error code that means the volume has an external
+ // journal which we couldn't find. in that case we do not want to
+ // rewrite the volume header - we'll just refuse to mount the volume.
+ retval = EINVAL;
+ goto ErrorExit;
+ }
+
hfsmp->jnl = NULL;
// if the journal failed to open, then set the lastMountedVersion
mdb_offset = (daddr64_t)((embeddedOffset / blockSize) + HFS_PRI_SECTOR(blockSize));
- retval = (int)buf_meta_bread(hfsmp->hfs_devvp, mdb_offset, blockSize, cred, &bp);
+ bp = NULL;
+ retval = (int)buf_meta_bread(hfsmp->hfs_devvp,
+ HFS_PHYSBLK_ROUNDDOWN(mdb_offset, hfsmp->hfs_log_per_phys),
+ hfsmp->hfs_physical_block_size, cred, &bp);
if (retval == 0) {
- jvhp = (HFSPlusVolumeHeader *)(buf_dataptr(bp) + HFS_PRI_OFFSET(blockSize));
+ jvhp = (HFSPlusVolumeHeader *)(buf_dataptr(bp) + HFS_PRI_OFFSET(hfsmp->hfs_physical_block_size));
if (SWAP_BE16(jvhp->signature) == kHFSPlusSigWord || SWAP_BE16(jvhp->signature) == kHFSXSigWord) {
printf ("hfs(3): Journal replay fail. Writing lastMountVersion as FSK!\n");
retval = EINVAL;
goto ErrorExit;
} else if (hfsmp->jnl) {
- vfs_setflags(hfsmp->hfs_mp, (uint64_t)((unsigned int)MNT_JOURNALED));
+ vfs_setflags(hfsmp->hfs_mp, (u_int64_t)((unsigned int)MNT_JOURNALED));
}
} else if (hfsmp->jnl || ((vcb->vcbAtrb & kHFSVolumeJournaledMask) && (hfsmp->hfs_flags & HFS_READ_ONLY))) {
struct cat_attr jinfo_attr, jnl_attr;
if (hfsmp->hfs_flags & HFS_READ_ONLY) {
vcb->vcbAtrb |= kHFSVolumeJournaledMask;
}
+
+ if (hfsmp->jnl == NULL) {
+ vfs_clearflags(hfsmp->hfs_mp, (u_int64_t)((unsigned int)MNT_JOURNALED));
+ }
}
/*
/* Keep the roving allocator out of the metadata zone. */
if (vcb->nextAllocation >= hfsmp->hfs_metazone_start &&
vcb->nextAllocation <= hfsmp->hfs_metazone_end) {
- vcb->nextAllocation = hfsmp->hfs_metazone_end + 1;
+ HFS_UPDATE_NEXT_ALLOCATION(hfsmp, hfsmp->hfs_metazone_end + 1);
+ }
+ } else {
+ if (vcb->nextAllocation <= 1) {
+ vcb->nextAllocation = hfsmp->hfs_min_alloc_start;
}
}
+ vcb->sparseAllocation = hfsmp->hfs_min_alloc_start;
+
+ /* Setup private/hidden directories for hardlinks. */
+ hfs_privatedir_init(hfsmp, FILE_HARDLINKS);
+ hfs_privatedir_init(hfsmp, DIR_HARDLINKS);
- /* setup private/hidden directory for unlinked files */
- FindMetaDataDirectory(vcb);
if ((hfsmp->hfs_flags & HFS_READ_ONLY) == 0)
hfs_remove_orphans(hfsmp);
+ /* See if we need to erase unused Catalog nodes due to <rdar://problem/6947811>. */
+ if ((hfsmp->hfs_flags & HFS_READ_ONLY) == 0)
+ {
+ retval = hfs_erase_unused_nodes(hfsmp);
+ if (retval)
+ goto ErrorExit;
+ }
+
if ( !(vcb->vcbAtrb & kHFSVolumeHardwareLockMask) ) // if the disk is not write protected
{
MarkVCBDirty( vcb ); // mark VCB dirty so it will be written
(void) hfs_recording_init(hfsmp);
}
- hfs_checkextendedsecurity(hfsmp);
+ /* Force ACLs on HFS+ file systems. */
+ vfs_setextendedsecurity(HFSTOVFS(hfsmp));
+
+ /* Check if volume supports writing of extent-based extended attributes */
+ hfs_check_volxattr(hfsmp, HFS_SET_XATTREXTENTS_STATE);
return (0);
__private_extern__
int
-hfsUnmount( register struct hfsmount *hfsmp, struct proc *p)
+hfsUnmount( register struct hfsmount *hfsmp, __unused struct proc *p)
{
+ /* Get rid of our attribute data vnode (if any). */
+ if (hfsmp->hfs_attrdata_vp) {
+ vnode_t advp = hfsmp->hfs_attrdata_vp;
+
+ if (vnode_get(advp) == 0) {
+ vnode_rele_ext(advp, O_EVTONLY, 0);
+ vnode_put(advp);
+ }
+ hfsmp->hfs_attrdata_vp = NULLVP;
+ }
+
+ if (hfsmp->hfs_startup_vp)
+ ReleaseMetaFileVNode(hfsmp->hfs_startup_vp);
+
if (hfsmp->hfs_allocation_vp)
ReleaseMetaFileVNode(hfsmp->hfs_allocation_vp);
ReleaseMetaFileVNode(hfsmp->hfs_catalog_vp);
ReleaseMetaFileVNode(hfsmp->hfs_extents_vp);
+ /*
+ * Setting these pointers to NULL so that any references
+ * past this point will fail, and tell us the point of failure.
+ * Also, facilitates a check in hfs_update for a null catalog
+ * vp
+ */
+ hfsmp->hfs_allocation_vp = NULL;
+ hfsmp->hfs_attribute_vp = NULL;
+ hfsmp->hfs_catalog_vp = NULL;
+ hfsmp->hfs_extents_vp = NULL;
+ hfsmp->hfs_startup_vp = NULL;
+
return (0);
}
int
overflow_extents(struct filefork *fp)
{
- u_long blocks;
+ u_int32_t blocks;
- if (VTOVCB(FTOV(fp))->vcbSigWord == kHFSPlusSigWord) {
+ //
+ // If the vnode pointer is NULL then we're being called
+ // from hfs_remove_orphans() with a faked-up filefork
+ // and therefore it has to be an HFS+ volume. Otherwise
+ // we check through the volume header to see what type
+ // of volume we're on.
+ //
+ if (FTOV(fp) == NULL || VTOVCB(FTOV(fp))->vcbSigWord == kHFSPlusSigWord) {
if (fp->ff_extents[7].blockCount == 0)
return (0);
int
hfs_systemfile_lock(struct hfsmount *hfsmp, int flags, enum hfslocktype locktype)
{
- if (flags & ~SFL_VALIDMASK)
- panic("hfs_systemfile_lock: invalid lock request (0x%x)", (unsigned long) flags);
/*
- * Locking order is Catalog file, Attributes file, Bitmap file, Extents file
+ * Locking order is Catalog file, Attributes file, Startup file, Bitmap file, Extents file
*/
if (flags & SFL_CATALOG) {
- (void) hfs_lock(VTOC(hfsmp->hfs_catalog_vp), locktype);
+
+#ifdef HFS_CHECK_LOCK_ORDER
+ if (hfsmp->hfs_attribute_cp && hfsmp->hfs_attribute_cp->c_lockowner == current_thread()) {
+ panic("hfs_systemfile_lock: bad lock order (Attributes before Catalog)");
+ }
+ if (hfsmp->hfs_startup_cp && hfsmp->hfs_startup_cp->c_lockowner == current_thread()) {
+ panic("hfs_systemfile_lock: bad lock order (Startup before Catalog)");
+ }
+ if (hfsmp-> hfs_extents_cp && hfsmp->hfs_extents_cp->c_lockowner == current_thread()) {
+ panic("hfs_systemfile_lock: bad lock order (Extents before Catalog)");
+ }
+#endif /* HFS_CHECK_LOCK_ORDER */
+
+ (void) hfs_lock(hfsmp->hfs_catalog_cp, locktype);
/*
* When the catalog file has overflow extents then
* also acquire the extents b-tree lock if its not
}
}
if (flags & SFL_ATTRIBUTE) {
- if (hfsmp->hfs_attribute_vp) {
- (void) hfs_lock(VTOC(hfsmp->hfs_attribute_vp), locktype);
+
+#ifdef HFS_CHECK_LOCK_ORDER
+ if (hfsmp->hfs_startup_cp && hfsmp->hfs_startup_cp->c_lockowner == current_thread()) {
+ panic("hfs_systemfile_lock: bad lock order (Startup before Attributes)");
+ }
+ if (hfsmp->hfs_extents_cp && hfsmp->hfs_extents_cp->c_lockowner == current_thread()) {
+ panic("hfs_systemfile_lock: bad lock order (Extents before Attributes)");
+ }
+#endif /* HFS_CHECK_LOCK_ORDER */
+
+ if (hfsmp->hfs_attribute_cp) {
+ (void) hfs_lock(hfsmp->hfs_attribute_cp, locktype);
/*
* When the attribute file has overflow extents then
* also acquire the extents b-tree lock if its not
flags &= ~SFL_ATTRIBUTE;
}
}
- if (flags & SFL_BITMAP) {
+ if (flags & SFL_STARTUP) {
+#ifdef HFS_CHECK_LOCK_ORDER
+ if (hfsmp-> hfs_extents_cp && hfsmp->hfs_extents_cp->c_lockowner == current_thread()) {
+ panic("hfs_systemfile_lock: bad lock order (Extents before Startup)");
+ }
+#endif /* HFS_CHECK_LOCK_ORDER */
+
+ (void) hfs_lock(hfsmp->hfs_startup_cp, locktype);
+ /*
+ * When the startup file has overflow extents then
+ * also acquire the extents b-tree lock if its not
+ * already requested.
+ */
+ if ((flags & SFL_EXTENTS) == 0 &&
+ overflow_extents(VTOF(hfsmp->hfs_startup_vp))) {
+ flags |= SFL_EXTENTS;
+ }
+ }
+ /*
+ * To prevent locks being taken in the wrong order, the extent lock
+ * gets a bitmap lock as well.
+ */
+ if (flags & (SFL_BITMAP | SFL_EXTENTS)) {
/*
* Since the only bitmap operations are clearing and
* setting bits we always need exclusive access. And
* lock since we can only change the bitmap from
* within a transaction.
*/
- if (hfsmp->jnl) {
+ if (hfsmp->jnl || (hfsmp->hfs_allocation_cp == NULL)) {
flags &= ~SFL_BITMAP;
} else {
- (void) hfs_lock(VTOC(hfsmp->hfs_allocation_vp), HFS_EXCLUSIVE_LOCK);
+ (void) hfs_lock(hfsmp->hfs_allocation_cp, HFS_EXCLUSIVE_LOCK);
+ /* The bitmap lock is also grabbed when only extent lock
+ * was requested. Set the bitmap lock bit in the lock
+ * flags which callers will use during unlock.
+ */
+ flags |= SFL_BITMAP;
}
}
if (flags & SFL_EXTENTS) {
* Since the extents btree lock is recursive we always
* need exclusive access.
*/
- (void) hfs_lock(VTOC(hfsmp->hfs_extents_vp), HFS_EXCLUSIVE_LOCK);
+ (void) hfs_lock(hfsmp->hfs_extents_cp, HFS_EXCLUSIVE_LOCK);
}
return (flags);
}
u_int32_t lastfsync;
int numOfLockedBuffs;
- microuptime(&tv);
- lastfsync = tv.tv_sec;
-
- if (flags & ~SFL_VALIDMASK)
- panic("hfs_systemfile_unlock: invalid lock request (0x%x)", (unsigned long) flags);
-
- if (flags & SFL_ATTRIBUTE && hfsmp->hfs_attribute_vp) {
+ if (hfsmp->jnl == NULL) {
+ microuptime(&tv);
+ lastfsync = tv.tv_sec;
+ }
+ if (flags & SFL_STARTUP && hfsmp->hfs_startup_cp) {
+ hfs_unlock(hfsmp->hfs_startup_cp);
+ }
+ if (flags & SFL_ATTRIBUTE && hfsmp->hfs_attribute_cp) {
if (hfsmp->jnl == NULL) {
BTGetLastSync((FCB*)VTOF(hfsmp->hfs_attribute_vp), &lastfsync);
numOfLockedBuffs = count_lock_queue();
hfs_btsync(hfsmp->hfs_attribute_vp, HFS_SYNCTRANS);
}
}
- hfs_unlock(VTOC(hfsmp->hfs_attribute_vp));
+ hfs_unlock(hfsmp->hfs_attribute_cp);
}
if (flags & SFL_CATALOG) {
if (hfsmp->jnl == NULL) {
hfs_btsync(hfsmp->hfs_catalog_vp, HFS_SYNCTRANS);
}
}
- hfs_unlock(VTOC(hfsmp->hfs_catalog_vp));
+ hfs_unlock(hfsmp->hfs_catalog_cp);
}
if (flags & SFL_BITMAP) {
- hfs_unlock(VTOC(hfsmp->hfs_allocation_vp));
+ hfs_unlock(hfsmp->hfs_allocation_cp);
}
if (flags & SFL_EXTENTS) {
if (hfsmp->jnl == NULL) {
hfs_btsync(hfsmp->hfs_extents_vp, HFS_SYNCTRANS);
}
}
- hfs_unlock(VTOC(hfsmp->hfs_extents_vp));
+ hfs_unlock(hfsmp->hfs_extents_cp);
}
}
if (!locked && !shareable) {
switch (VTOC(vp)->c_fileid) {
case kHFSExtentsFileID:
- panic("extents btree not locked! v: 0x%08X\n #\n", (u_int)vp);
+ panic("hfs: extents btree not locked! v: 0x%08X\n #\n", (u_int)vp);
break;
case kHFSCatalogFileID:
- panic("catalog btree not locked! v: 0x%08X\n #\n", (u_int)vp);
+ panic("hfs: catalog btree not locked! v: 0x%08X\n #\n", (u_int)vp);
break;
case kHFSAllocationFileID:
/* The allocation file can hide behind the jornal lock. */
if (VTOHFS(vp)->jnl == NULL)
- panic("allocation file not locked! v: 0x%08X\n #\n", (u_int)vp);
+ panic("hfs: allocation file not locked! v: 0x%08X\n #\n", (u_int)vp);
break;
+ case kHFSStartupFileID:
+ panic("hfs: startup file not locked! v: 0x%08X\n #\n", (u_int)vp);
case kHFSAttributesFileID:
- panic("attributes btree not locked! v: 0x%08X\n #\n", (u_int)vp);
+ panic("hfs: attributes btree not locked! v: 0x%08X\n #\n", (u_int)vp);
break;
}
}
*/
int
hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, kauth_cred_t cred,
- struct proc *p, int invokesuperuserstatus)
+ __unused struct proc *p, int invokesuperuserstatus)
{
if ((kauth_cred_getuid(cred) == cnode_uid) || /* [1a] */
(cnode_uid == UNKNOWNUID) || /* [1b] */
}
-unsigned long BestBlockSizeFit(unsigned long allocationBlockSize,
- unsigned long blockSizeLimit,
- unsigned long baseMultiple) {
+u_int32_t BestBlockSizeFit(u_int32_t allocationBlockSize,
+ u_int32_t blockSizeLimit,
+ u_int32_t baseMultiple) {
/*
Compute the optimal (largest) block size (no larger than allocationBlockSize) that is less than the
specified limit but still an even multiple of the baseMultiple.
*/
int baseBlockCount, blockCount;
- unsigned long trialBlockSize;
+ u_int32_t trialBlockSize;
if (allocationBlockSize % baseMultiple != 0) {
/*
}
-/*
- * To make the HFS Plus filesystem follow UFS unlink semantics, a remove
- * of an active vnode is translated to a move/rename so the file appears
- * deleted. The destination folder for these move/renames is setup here
- * and a reference to it is place in hfsmp->hfs_privdir_desc.
- */
-__private_extern__
-u_long
-FindMetaDataDirectory(ExtendedVCB *vcb)
-{
- struct hfsmount * hfsmp;
- struct vnode * dvp = NULL;
- struct cnode * dcp = NULL;
- struct FndrDirInfo * fndrinfo;
- struct cat_desc out_desc = {0};
- struct proc *p = current_proc();
- struct timeval tv;
- cat_cookie_t cookie;
- int lockflags;
- int error;
-
- if (vcb->vcbSigWord != kHFSPlusSigWord)
- return (0);
-
- hfsmp = VCBTOHFS(vcb);
-
- if (hfsmp->hfs_privdir_desc.cd_parentcnid == 0) {
- hfsmp->hfs_privdir_desc.cd_parentcnid = kRootDirID;
- hfsmp->hfs_privdir_desc.cd_nameptr = hfs_privdirname;
- hfsmp->hfs_privdir_desc.cd_namelen = strlen(hfs_privdirname);
- hfsmp->hfs_privdir_desc.cd_flags = CD_ISDIR;
- }
-
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
-
- error = cat_lookup(hfsmp, &hfsmp->hfs_privdir_desc, 0, NULL,
- &hfsmp->hfs_privdir_attr, NULL, NULL);
-
- hfs_systemfile_unlock(hfsmp, lockflags);
-
- if (error == 0) {
- hfsmp->hfs_metadata_createdate = hfsmp->hfs_privdir_attr.ca_itime;
- hfsmp->hfs_privdir_desc.cd_cnid = hfsmp->hfs_privdir_attr.ca_fileid;
- /*
- * Clear the system immutable flag if set...
- */
- if ((hfsmp->hfs_privdir_attr.ca_flags & SF_IMMUTABLE) &&
- (hfsmp->hfs_flags & HFS_READ_ONLY) == 0) {
- hfsmp->hfs_privdir_attr.ca_flags &= ~SF_IMMUTABLE;
-
- if ((error = hfs_start_transaction(hfsmp)) != 0) {
- return (hfsmp->hfs_privdir_attr.ca_fileid);
- }
-
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
- (void) cat_update(hfsmp, &hfsmp->hfs_privdir_desc,
- &hfsmp->hfs_privdir_attr, NULL, NULL);
- hfs_systemfile_unlock(hfsmp, lockflags);
-
- hfs_end_transaction(hfsmp);
- }
- return (hfsmp->hfs_privdir_attr.ca_fileid);
-
- } else if (hfsmp->hfs_flags & HFS_READ_ONLY) {
-
- return (0);
- }
-
- /* Setup the default attributes */
- bzero(&hfsmp->hfs_privdir_attr, sizeof(struct cat_attr));
- hfsmp->hfs_privdir_attr.ca_mode = S_IFDIR;
- hfsmp->hfs_privdir_attr.ca_nlink = 2;
- hfsmp->hfs_privdir_attr.ca_itime = vcb->vcbCrDate;
- microtime(&tv);
- hfsmp->hfs_privdir_attr.ca_mtime = tv.tv_sec;
-
- /* hidden and off the desktop view */
- fndrinfo = (struct FndrDirInfo *)&hfsmp->hfs_privdir_attr.ca_finderinfo;
- fndrinfo->frLocation.v = SWAP_BE16 (22460);
- fndrinfo->frLocation.h = SWAP_BE16 (22460);
- fndrinfo->frFlags |= SWAP_BE16 (kIsInvisible + kNameLocked);
-
- if ((error = hfs_start_transaction(hfsmp)) != 0) {
- return (0);
- }
- /* Reserve some space in the Catalog file. */
- if (cat_preflight(hfsmp, CAT_CREATE, &cookie, p) != 0) {
- hfs_end_transaction(hfsmp);
-
- return (0);
- }
-
- lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
-
- error = cat_create(hfsmp, &hfsmp->hfs_privdir_desc,
- &hfsmp->hfs_privdir_attr, &out_desc);
-
- hfs_systemfile_unlock(hfsmp, lockflags);
-
- cat_postflight(hfsmp, &cookie, p);
-
- if (error) {
- hfs_volupdate(hfsmp, VOL_UPDATE, 0);
-
- hfs_end_transaction(hfsmp);
-
- return (0);
- }
-
- hfsmp->hfs_privdir_desc.cd_hint = out_desc.cd_hint;
- hfsmp->hfs_privdir_desc.cd_cnid = out_desc.cd_cnid;
- hfsmp->hfs_privdir_attr.ca_fileid = out_desc.cd_cnid;
- hfsmp->hfs_metadata_createdate = vcb->vcbCrDate;
-
- if (hfs_vget(hfsmp, kRootDirID, &dvp, 0) == 0) {
- dcp = VTOC(dvp);
- dcp->c_childhint = out_desc.cd_hint;
- dcp->c_nlink++;
- dcp->c_entries++;
- dcp->c_touch_chgtime = TRUE;
- dcp->c_touch_modtime = TRUE;
- (void) hfs_update(dvp, 0);
- hfs_unlock(dcp);
- vnode_put(dvp);
- }
- hfs_volupdate(hfsmp, VOL_MKDIR, 1);
- hfs_end_transaction(hfsmp);
-
- cat_releasedesc(&out_desc);
-
- return (out_desc.cd_cnid);
-}
-
__private_extern__
-u_long
-GetFileInfo(ExtendedVCB *vcb, u_int32_t dirid, const char *name,
+u_int32_t
+GetFileInfo(ExtendedVCB *vcb, __unused u_int32_t dirid, const char *name,
struct cat_attr *fattr, struct cat_fork *forkinfo)
{
struct hfsmount * hfsmp;
- struct vnode * dvp = NULL;
- struct cnode * dcp = NULL;
- struct FndrDirInfo * fndrinfo;
struct cat_desc jdesc;
int lockflags;
int error;
memset(&jdesc, 0, sizeof(struct cat_desc));
jdesc.cd_parentcnid = kRootDirID;
- jdesc.cd_nameptr = name;
+ jdesc.cd_nameptr = (const u_int8_t *)name;
jdesc.cd_namelen = strlen(name);
lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_SHARED_LOCK);
/*
- * On HFS Plus Volume, there can be orphaned files. These
- * are files that were unlinked while busy. If the volume
- * was not cleanly unmounted then some of these files may
+ * On HFS Plus Volumes, there can be orphaned files or directories
+ * These are files or directories that were unlinked while busy.
+ * If the volume was not cleanly unmounted then some of these may
* have persisted and need to be removed.
*/
__private_extern__
int started_tr = 0;
int lockflags;
int result;
- int orphanedlinks = 0;
+ int orphaned_files = 0;
+ int orphaned_dirs = 0;
bzero(&cookie, sizeof(cookie));
/* Build a key to "temp" */
keyp = (HFSPlusCatalogKey*)&iterator->key;
- keyp->parentID = hfsmp->hfs_privdir_desc.cd_cnid;
+ keyp->parentID = hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid;
keyp->nodeName.length = 4; /* "temp" */
keyp->keyLength = kHFSPlusCatalogKeyMinimumLength + keyp->nodeName.length * 2;
keyp->nodeName.unicode[0] = 't';
keyp->nodeName.unicode[3] = 'p';
/*
- * Position the iterator just before the first real temp file.
+ * Position the iterator just before the first real temp file/dir.
*/
lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
(void) BTSearchRecord(fcb, iterator, NULL, NULL, iterator);
hfs_systemfile_unlock(hfsmp, lockflags);
- /* Visit all the temp files in the HFS+ private directory. */
+ /* Visit all the temp files/dirs in the HFS+ private directory. */
for (;;) {
lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
result = BTIterateRecord(fcb, kBTreeNextRecord, iterator, &btdata, NULL);
hfs_systemfile_unlock(hfsmp, lockflags);
if (result)
break;
- if (keyp->parentID != hfsmp->hfs_privdir_desc.cd_cnid)
+ if (keyp->parentID != hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid)
break;
- if (filerec.recordType != kHFSPlusFileRecord)
- continue;
(void) utf8_encodestr(keyp->nodeName.unicode, keyp->nodeName.length * 2,
- filename, &namelen, sizeof(filename), 0, 0);
+ (u_int8_t *)filename, &namelen, sizeof(filename), 0, 0);
- (void) sprintf(tempname, "%s%d", HFS_DELETE_PREFIX, filerec.fileID);
+ (void) snprintf(tempname, sizeof(tempname), "%s%d",
+ HFS_DELETE_PREFIX, filerec.fileID);
/*
- * Delete all files named "tempxxx", where
- * xxx is the file's cnid in decimal.
+ * Delete all files (and directories) named "tempxxx",
+ * where xxx is the file's cnid in decimal.
*
*/
if (bcmp(tempname, filename, namelen) == 0) {
bzero(&rfork, sizeof(rfork));
bzero(&cnode, sizeof(cnode));
+ /* Delete any attributes, ignore errors */
+ (void) hfs_removeallattr(hfsmp, filerec.fileID);
+
if (hfs_start_transaction(hfsmp) != 0) {
printf("hfs_remove_orphans: failed to start transaction\n");
goto exit;
/* Build a fake cnode */
cat_convertattr(hfsmp, (CatalogRecord *)&filerec, &cnode.c_attr,
&dfork.ff_data, &rfork.ff_data);
- cnode.c_desc.cd_parentcnid = hfsmp->hfs_privdir_desc.cd_cnid;
- cnode.c_desc.cd_nameptr = filename;
+ cnode.c_desc.cd_parentcnid = hfsmp->hfs_private_desc[FILE_HARDLINKS].cd_cnid;
+ cnode.c_desc.cd_nameptr = (const u_int8_t *)filename;
cnode.c_desc.cd_namelen = namelen;
cnode.c_desc.cd_cnid = cnode.c_attr.ca_fileid;
cnode.c_blocks = dfork.ff_blocks + rfork.ff_blocks;
cnode.c_rsrcfork = NULL;
fsize = (u_int64_t)dfork.ff_blocks * (u_int64_t)HFSTOVCB(hfsmp)->blockSize;
while (fsize > 0) {
- if (fsize > HFS_BIGFILE_SIZE) {
+ if (fsize > HFS_BIGFILE_SIZE && overflow_extents(&dfork)) {
fsize -= HFS_BIGFILE_SIZE;
} else {
fsize = 0;
}
if (TruncateFileC(vcb, (FCB*)&dfork, fsize, false) != 0) {
- printf("error truncting data fork!\n");
+ printf("hfs: error truncting data fork!\n");
break;
}
// that no one transaction gets too big.
//
if (fsize > 0 && started_tr) {
+ /* Drop system file locks before starting
+ * another transaction to preserve lock order.
+ */
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ catlock = 0;
hfs_end_transaction(hfsmp);
+
if (hfs_start_transaction(hfsmp) != 0) {
started_tr = 0;
break;
}
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG | SFL_ATTRIBUTE | SFL_EXTENTS | SFL_BITMAP, HFS_EXCLUSIVE_LOCK);
+ catlock = 1;
}
}
}
cnode.c_datafork = NULL;
cnode.c_rsrcfork = &rfork;
if (TruncateFileC(vcb, (FCB*)&rfork, 0, false) != 0) {
- printf("error truncting rsrc fork!\n");
+ printf("hfs: error truncting rsrc fork!\n");
break;
}
}
- /* Remove the file record from the Catalog */
+ /* Remove the file or folder record from the Catalog */
if (cat_delete(hfsmp, &cnode.c_desc, &cnode.c_attr) != 0) {
- printf("hfs_remove_oprhans: error deleting cat rec for id %d!\n", cnode.c_desc.cd_cnid);
+ printf("hfs_remove_orphans: error deleting cat rec for id %d!\n", cnode.c_desc.cd_cnid);
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ catlock = 0;
hfs_volupdate(hfsmp, VOL_UPDATE, 0);
break;
}
- ++orphanedlinks;
-
- /* Delete any attributes, ignore errors */
- (void) hfs_removeallattr(hfsmp, cnode.c_fileid);
+ if (cnode.c_attr.ca_mode & S_IFDIR) {
+ orphaned_dirs++;
+ }
+ else {
+ orphaned_files++;
+ }
+
/* Update parent and volume counts */
- hfsmp->hfs_privdir_attr.ca_entries--;
- (void)cat_update(hfsmp, &hfsmp->hfs_privdir_desc,
- &hfsmp->hfs_privdir_attr, NULL, NULL);
- hfs_volupdate(hfsmp, VOL_RMFILE, 0);
+ hfsmp->hfs_private_attr[FILE_HARDLINKS].ca_entries--;
+ if (cnode.c_attr.ca_mode & S_IFDIR) {
+ DEC_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);
/* Drop locks and end the transaction */
hfs_systemfile_unlock(hfsmp, lockflags);
cat_postflight(hfsmp, &cookie, p);
catlock = catreserve = 0;
+
+ /*
+ Now that Catalog is unlocked, update the volume info, making
+ sure to differentiate between files and directories
+ */
+ if (cnode.c_attr.ca_mode & S_IFDIR) {
+ hfs_volupdate(hfsmp, VOL_RMDIR, 0);
+ }
+ else{
+ hfs_volupdate(hfsmp, VOL_RMFILE, 0);
+ }
+
if (started_tr) {
hfs_end_transaction(hfsmp);
started_tr = 0;
} /* end if */
} /* end for */
- if (orphanedlinks > 0)
- printf("HFS: Removed %d orphaned unlinked files\n", orphanedlinks);
+ if (orphaned_files > 0 || orphaned_dirs > 0)
+ printf("hfs: Removed %d orphaned / unlinked files and %d directories \n", orphaned_files, orphaned_dirs);
exit:
if (catlock) {
hfs_systemfile_unlock(hfsmp, lockflags);
u_int32_t
hfs_freeblks(struct hfsmount * hfsmp, int wantreserve)
{
- ExtendedVCB *vcb = HFSTOVCB(hfsmp);
u_int32_t freeblks;
+ u_int32_t rsrvblks;
+ u_int32_t loanblks;
- HFS_MOUNT_LOCK(hfsmp, TRUE);
- freeblks = vcb->freeBlocks;
+ /*
+ * We don't bother taking the mount lock
+ * to look at these values since the values
+ * themselves are each updated automically
+ * on aligned addresses.
+ */
+ freeblks = hfsmp->freeBlocks;
+ rsrvblks = hfsmp->reserveBlocks;
+ loanblks = hfsmp->loanedBlocks;
if (wantreserve) {
- if (freeblks > vcb->reserveBlocks)
- freeblks -= vcb->reserveBlocks;
+ if (freeblks > rsrvblks)
+ freeblks -= rsrvblks;
else
freeblks = 0;
}
- if (freeblks > vcb->loanedBlocks)
- freeblks -= vcb->loanedBlocks;
+ if (freeblks > loanblks)
+ freeblks -= loanblks;
else
freeblks = 0;
- HFS_MOUNT_UNLOCK(hfsmp, TRUE);
#ifdef HFS_SPARSE_DEV
/*
*/
if ((hfsmp->hfs_flags & HFS_HAS_SPARSE_DEVICE) && hfsmp->hfs_backingfs_rootvp) {
struct vfsstatfs *vfsp; /* 272 bytes */
- u_int32_t vfreeblks;
+ u_int64_t vfreeblks;
u_int32_t loanedblks;
struct mount * backingfs_mp;
+ struct timeval now;
backingfs_mp = vnode_mount(hfsmp->hfs_backingfs_rootvp);
- if (vfsp = vfs_statfs(backingfs_mp)) {
+ microtime(&now);
+ if ((now.tv_sec - hfsmp->hfs_last_backingstatfs) >= 1) {
+ vfs_update_vfsstat(backingfs_mp, vfs_context_kernel(), VFS_KERNEL_EVENT);
+ hfsmp->hfs_last_backingstatfs = now.tv_sec;
+ }
+
+ if ((vfsp = vfs_statfs(backingfs_mp))) {
HFS_MOUNT_LOCK(hfsmp, TRUE);
- vfreeblks = (u_int32_t)vfsp->f_bavail;
+ vfreeblks = vfsp->f_bavail;
/* Normalize block count if needed. */
- if (vfsp->f_bsize != vcb->blockSize) {
- vfreeblks = ((u_int64_t)vfreeblks * (u_int64_t)(vfsp->f_bsize)) / vcb->blockSize;
+ if (vfsp->f_bsize != hfsmp->blockSize) {
+ vfreeblks = ((u_int64_t)vfreeblks * (u_int64_t)(vfsp->f_bsize)) / hfsmp->blockSize;
}
- if (vfreeblks > hfsmp->hfs_sparsebandblks)
+ if (vfreeblks > (unsigned int)hfsmp->hfs_sparsebandblks)
vfreeblks -= hfsmp->hfs_sparsebandblks;
else
vfreeblks = 0;
/* Take into account any delayed allocations. */
- loanedblks = 2 * vcb->loanedBlocks;
+ loanedblks = 2 * hfsmp->loanedBlocks;
if (vfreeblks > loanedblks)
vfreeblks -= loanedblks;
else
vfreeblks = 0;
+ if (hfsmp->hfs_backingfs_maxblocks) {
+ vfreeblks = MIN(vfreeblks, hfsmp->hfs_backingfs_maxblocks);
+ }
freeblks = MIN(vfreeblks, freeblks);
HFS_MOUNT_UNLOCK(hfsmp, TRUE);
}
* Find the current thread's directory hint for a given index.
*
* Requires an exclusive lock on directory cnode.
+ *
+ * Use detach if the cnode lock must be dropped while the hint is still active.
*/
__private_extern__
directoryhint_t *
-hfs_getdirhint(struct cnode *dcp, int index)
+hfs_getdirhint(struct cnode *dcp, int index, int detach)
{
struct timeval tv;
directoryhint_t *hint;
boolean_t need_remove, need_init;
- char * name;
+ const u_int8_t * name;
microuptime(&tv);
need_remove = false;
} else { /* recycle the last (i.e., the oldest) hint */
hint = TAILQ_LAST(&dcp->c_hintlist, hfs_hinthead);
- if ((name = hint->dh_desc.cd_nameptr)) {
+ if ((hint->dh_desc.cd_flags & CD_HASBUF) &&
+ (name = hint->dh_desc.cd_nameptr)) {
hint->dh_desc.cd_nameptr = NULL;
- vfs_removename(name);
+ hint->dh_desc.cd_namelen = 0;
+ hint->dh_desc.cd_flags &= ~CD_HASBUF;
+ vfs_removename((const char *)name);
}
need_remove = true;
}
if (need_remove)
TAILQ_REMOVE(&dcp->c_hintlist, hint, dh_link);
- TAILQ_INSERT_HEAD(&dcp->c_hintlist, hint, dh_link);
+ if (detach)
+ --dcp->c_dirhintcnt;
+ else
+ TAILQ_INSERT_HEAD(&dcp->c_hintlist, hint, dh_link);
if (need_init) {
hint->dh_index = index;
hint->dh_desc.cd_encoding = 0;
hint->dh_desc.cd_namelen = 0;
hint->dh_desc.cd_nameptr = NULL;
- hint->dh_desc.cd_parentcnid = dcp->c_cnid;
+ hint->dh_desc.cd_parentcnid = dcp->c_fileid;
hint->dh_desc.cd_hint = dcp->c_childhint;
hint->dh_desc.cd_cnid = 0;
}
void
hfs_reldirhint(struct cnode *dcp, directoryhint_t * relhint)
{
- char * name;
+ const u_int8_t * name;
+ directoryhint_t *hint;
- TAILQ_REMOVE(&dcp->c_hintlist, relhint, dh_link);
+ /* Check if item is on list (could be detached) */
+ TAILQ_FOREACH(hint, &dcp->c_hintlist, dh_link) {
+ if (hint == relhint) {
+ TAILQ_REMOVE(&dcp->c_hintlist, relhint, dh_link);
+ --dcp->c_dirhintcnt;
+ break;
+ }
+ }
name = relhint->dh_desc.cd_nameptr;
- if (name != NULL) {
+ if ((relhint->dh_desc.cd_flags & CD_HASBUF) && (name != NULL)) {
relhint->dh_desc.cd_nameptr = NULL;
- vfs_removename(name);
+ relhint->dh_desc.cd_namelen = 0;
+ relhint->dh_desc.cd_flags &= ~CD_HASBUF;
+ vfs_removename((const char *)name);
}
FREE_ZONE(relhint, sizeof(directoryhint_t), M_HFSDIRHINT);
- --dcp->c_dirhintcnt;
}
/*
{
struct timeval tv;
directoryhint_t *hint, *prev;
- char * name;
+ const u_int8_t * name;
if (stale_hints_only)
microuptime(&tv);
if (stale_hints_only && (tv.tv_sec - hint->dh_time) < HFS_DIRHINT_TTL)
break; /* stop here if this entry is too new */
name = hint->dh_desc.cd_nameptr;
- if (name != NULL) {
+ if ((hint->dh_desc.cd_flags & CD_HASBUF) && (name != NULL)) {
hint->dh_desc.cd_nameptr = NULL;
- vfs_removename(name);
+ hint->dh_desc.cd_namelen = 0;
+ hint->dh_desc.cd_flags &= ~CD_HASBUF;
+ vfs_removename((const char *)name);
}
prev = TAILQ_PREV(hint, hfs_hinthead, dh_link); /* must save this pointer before calling FREE_ZONE on this node */
TAILQ_REMOVE(&dcp->c_hintlist, hint, dh_link);
}
}
+/*
+ * Insert a detached directory hint back into the list of dirhints.
+ *
+ * Requires an exclusive lock on directory cnode.
+ */
+__private_extern__
+void
+hfs_insertdirhint(struct cnode *dcp, directoryhint_t * hint)
+{
+ directoryhint_t *test;
+
+ TAILQ_FOREACH(test, &dcp->c_hintlist, dh_link) {
+ if (test == hint)
+ panic("hfs_insertdirhint: hint %p already on list!", hint);
+ }
+
+ TAILQ_INSERT_HEAD(&dcp->c_hintlist, hint, dh_link);
+ ++dcp->c_dirhintcnt;
+}
/*
* Perform a case-insensitive compare of two UTF-8 filenames.
*/
__private_extern__
int
-hfs_namecmp(const char *str1, size_t len1, const char *str2, size_t len2)
+hfs_namecmp(const u_int8_t *str1, size_t len1, const u_int8_t *str2, size_t len2)
{
u_int16_t *ustr1, *ustr2;
size_t ulen1, ulen2;
}
+typedef struct jopen_cb_info {
+ off_t jsize;
+ char *desired_uuid;
+ struct vnode *jvp;
+ size_t blksize;
+ int need_clean;
+ int need_init;
+} jopen_cb_info;
+
+static int
+journal_open_cb(const char *bsd_dev_name, const char *uuid_str, void *arg)
+{
+ struct nameidata nd;
+ jopen_cb_info *ji = (jopen_cb_info *)arg;
+ char bsd_name[256];
+ int error;
+
+ strlcpy(&bsd_name[0], "/dev/", sizeof(bsd_name));
+ strlcpy(&bsd_name[5], bsd_dev_name, sizeof(bsd_name)-5);
+
+ if (ji->desired_uuid && ji->desired_uuid[0] && strcmp(uuid_str, ji->desired_uuid) != 0) {
+ return 1; // keep iterating
+ }
+
+ // if we're here, either the desired uuid matched or there was no
+ // desired uuid so let's try to open the device for writing and
+ // see if it works. if it does, we'll use it.
+
+ NDINIT(&nd, LOOKUP, LOCKLEAF, UIO_SYSSPACE32, CAST_USER_ADDR_T(bsd_name), vfs_context_kernel());
+ if ((error = namei(&nd))) {
+ printf("hfs: journal open cb: error %d looking up device %s (dev uuid %s)\n", error, bsd_name, uuid_str);
+ return 1; // keep iterating
+ }
+
+ ji->jvp = nd.ni_vp;
+ nameidone(&nd);
+
+ if (ji->jvp == NULL) {
+ printf("hfs: journal open cb: did not find %s (error %d)\n", bsd_name, error);
+ } else {
+ error = VNOP_OPEN(ji->jvp, FREAD|FWRITE, vfs_context_kernel());
+ if (error == 0) {
+ // if the journal is dirty and we didn't specify a desired
+ // journal device uuid, then do not use the journal. but
+ // if the journal is just invalid (e.g. it hasn't been
+ // initialized) then just set the need_init flag.
+ if (ji->need_clean && ji->desired_uuid && ji->desired_uuid[0] == '\0') {
+ error = journal_is_clean(ji->jvp, 0, ji->jsize, (void *)1, ji->blksize);
+ if (error == EBUSY) {
+ VNOP_CLOSE(ji->jvp, FREAD|FWRITE, vfs_context_kernel());
+ vnode_put(ji->jvp);
+ ji->jvp = NULL;
+ return 1; // keep iterating
+ } else if (error == EINVAL) {
+ ji->need_init = 1;
+ }
+ }
+
+ if (ji->desired_uuid && ji->desired_uuid[0] == '\0') {
+ strlcpy(ji->desired_uuid, uuid_str, 128);
+ }
+ vnode_setmountedon(ji->jvp);
+ // printf("hfs: journal open cb: got device %s (%s)\n", bsd_name, uuid_str);
+ return 0; // stop iterating
+ } else {
+ vnode_put(ji->jvp);
+ ji->jvp = NULL;
+ }
+ }
+
+ return 1; // keep iterating
+}
+
+extern dev_t IOBSDGetMediaWithUUID(const char *uuid_cstring, char *bsd_name, int bsd_name_len, int timeout);
+extern void IOBSDIterateMediaWithContent(const char *uuid_cstring, int (*func)(const char *bsd_dev_name, const char *uuid_str, void *arg), void *arg);
+extern kern_return_t IOBSDGetPlatformUUID(__darwin_uuid_t uuid, mach_timespec_t timeoutp);
+kern_return_t IOBSDGetPlatformSerialNumber(char *serial_number_str, u_int32_t len);
+
+
+static vnode_t
+open_journal_dev(const char *vol_device,
+ int need_clean,
+ char *uuid_str,
+ char *machine_serial_num,
+ off_t jsize,
+ size_t blksize,
+ int *need_init)
+{
+ int retry_counter=0;
+ jopen_cb_info ji;
+
+ ji.jsize = jsize;
+ ji.desired_uuid = uuid_str;
+ ji.jvp = NULL;
+ ji.blksize = blksize;
+ ji.need_clean = need_clean;
+ ji.need_init = 0;
+
+// if (uuid_str[0] == '\0') {
+// printf("hfs: open journal dev: %s: locating any available non-dirty external journal partition\n", vol_device);
+// } else {
+// printf("hfs: open journal dev: %s: trying to find the external journal partition w/uuid %s\n", vol_device, uuid_str);
+// }
+ while (ji.jvp == NULL && retry_counter++ < 4) {
+ if (retry_counter > 1) {
+ if (uuid_str[0]) {
+ printf("hfs: open_journal_dev: uuid %s not found. waiting 10sec.\n", uuid_str);
+ } else {
+ printf("hfs: open_journal_dev: no available external journal partition found. waiting 10sec.\n");
+ }
+ delay_for_interval(10* 1000000, NSEC_PER_USEC); // wait for ten seconds and then try again
+ }
+
+ IOBSDIterateMediaWithContent(EXTJNL_CONTENT_TYPE_UUID, journal_open_cb, &ji);
+ }
+
+ if (ji.jvp == NULL) {
+ printf("hfs: volume: %s: did not find jnl device uuid: %s from machine serial number: %s\n",
+ vol_device, uuid_str, machine_serial_num);
+ }
+
+ *need_init = ji.need_init;
+
+ return ji.jvp;
+}
+
+
__private_extern__
int
hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
JournalInfoBlock *jibp;
struct buf *jinfo_bp, *bp;
int sectors_per_fsblock, arg_flags=0, arg_tbufsz=0;
- int retval, blksize = hfsmp->hfs_phys_block_size;
+ int retval, write_jibp = 0;
+ uint32_t blksize = hfsmp->hfs_logical_block_size;
struct vnode *devvp;
struct hfs_mount_args *args = _args;
-
+ u_int32_t jib_flags;
+ u_int64_t jib_offset;
+ u_int64_t jib_size;
+ const char *dev_name;
+
devvp = hfsmp->hfs_devvp;
+ dev_name = vnode_name(devvp);
+ if (dev_name == NULL) {
+ dev_name = "unknown-dev";
+ }
if (args != NULL && (args->flags & HFSFSMNT_EXTENDED_ARGS)) {
arg_flags = args->journal_flags;
sectors_per_fsblock = SWAP_BE32(vhp->blockSize) / blksize;
+ jinfo_bp = NULL;
retval = (int)buf_meta_bread(devvp,
(daddr64_t)((embeddedOffset/blksize) +
- (SWAP_BE32(vhp->journalInfoBlock)*sectors_per_fsblock)),
- SWAP_BE32(vhp->blockSize), cred, &jinfo_bp);
- if (retval)
+ ((u_int64_t)SWAP_BE32(vhp->journalInfoBlock)*sectors_per_fsblock)),
+ hfsmp->hfs_physical_block_size, cred, &jinfo_bp);
+ if (retval) {
+ if (jinfo_bp) {
+ buf_brelse(jinfo_bp);
+ }
return retval;
-
+ }
+
jibp = (JournalInfoBlock *)buf_dataptr(jinfo_bp);
- jibp->flags = SWAP_BE32(jibp->flags);
- jibp->offset = SWAP_BE64(jibp->offset);
- jibp->size = SWAP_BE64(jibp->size);
+ jib_flags = SWAP_BE32(jibp->flags);
+ jib_size = SWAP_BE64(jibp->size);
- if (jibp->flags & kJIJournalInFSMask) {
+ if (jib_flags & kJIJournalInFSMask) {
hfsmp->jvp = hfsmp->hfs_devvp;
+ jib_offset = SWAP_BE64(jibp->offset);
} else {
- printf("hfs: journal not stored in fs! don't know what to do.\n");
+ int need_init=0;
+
+ // if the volume was unmounted cleanly then we'll pick any
+ // available external journal partition
+ //
+ if (SWAP_BE32(vhp->attributes) & kHFSVolumeUnmountedMask) {
+ *((char *)&jibp->ext_jnl_uuid[0]) = '\0';
+ }
+
+ hfsmp->jvp = open_journal_dev(dev_name,
+ !(jib_flags & kJIJournalNeedInitMask),
+ (char *)&jibp->ext_jnl_uuid[0],
+ (char *)&jibp->machine_serial_num[0],
+ jib_size,
+ hfsmp->hfs_logical_block_size,
+ &need_init);
+ if (hfsmp->jvp == NULL) {
buf_brelse(jinfo_bp);
- return EINVAL;
+ return EROFS;
+ } else {
+ if (IOBSDGetPlatformSerialNumber(&jibp->machine_serial_num[0], sizeof(jibp->machine_serial_num)) != KERN_SUCCESS) {
+ strlcpy(&jibp->machine_serial_num[0], "unknown-machine-uuid", sizeof(jibp->machine_serial_num));
+ }
+ }
+
+ jib_offset = 0;
+ write_jibp = 1;
+ if (need_init) {
+ jib_flags |= kJIJournalNeedInitMask;
+ }
}
// save this off for the hack-y check in hfs_remove()
- hfsmp->jnl_start = jibp->offset / SWAP_BE32(vhp->blockSize);
- hfsmp->jnl_size = jibp->size;
+ hfsmp->jnl_start = jib_offset / SWAP_BE32(vhp->blockSize);
+ hfsmp->jnl_size = jib_size;
if ((hfsmp->hfs_flags & HFS_READ_ONLY) && (vfs_flags(hfsmp->hfs_mp) & MNT_ROOTFS) == 0) {
// if the file system is read-only, check if the journal is empty.
// if it is, then we can allow the mount. otherwise we have to
// return failure.
retval = journal_is_clean(hfsmp->jvp,
- jibp->offset + embeddedOffset,
- jibp->size,
+ jib_offset + embeddedOffset,
+ jib_size,
devvp,
- hfsmp->hfs_phys_block_size);
+ hfsmp->hfs_logical_block_size);
hfsmp->jnl = NULL;
buf_brelse(jinfo_bp);
if (retval) {
+ const char *name = vnode_getname(devvp);
printf("hfs: early journal init: volume on %s is read-only and journal is dirty. Can not mount volume.\n",
- vnode_name(devvp));
+ name ? name : "");
+ if (name)
+ vnode_putname(name);
}
return retval;
}
- if (jibp->flags & kJIJournalNeedInitMask) {
+ if (jib_flags & kJIJournalNeedInitMask) {
printf("hfs: Initializing the journal (joffset 0x%llx sz 0x%llx)...\n",
- jibp->offset + embeddedOffset, jibp->size);
+ jib_offset + embeddedOffset, jib_size);
hfsmp->jnl = journal_create(hfsmp->jvp,
- jibp->offset + embeddedOffset,
- jibp->size,
+ jib_offset + embeddedOffset,
+ jib_size,
devvp,
blksize,
arg_flags,
// no need to start a transaction here... if this were to fail
// we'd just re-init it on the next mount.
- jibp->flags &= ~kJIJournalNeedInitMask;
- jibp->flags = SWAP_BE32(jibp->flags);
- jibp->offset = SWAP_BE64(jibp->offset);
- jibp->size = SWAP_BE64(jibp->size);
+ jib_flags &= ~kJIJournalNeedInitMask;
+ jibp->flags = SWAP_BE32(jib_flags);
buf_bwrite(jinfo_bp);
jinfo_bp = NULL;
jibp = NULL;
} else {
//printf("hfs: Opening the journal (joffset 0x%llx sz 0x%llx vhp_blksize %d)...\n",
- // jibp->offset + embeddedOffset,
- // jibp->size, SWAP_BE32(vhp->blockSize));
+ // jib_offset + embeddedOffset,
+ // jib_size, SWAP_BE32(vhp->blockSize));
hfsmp->jnl = journal_open(hfsmp->jvp,
- jibp->offset + embeddedOffset,
- jibp->size,
+ jib_offset + embeddedOffset,
+ jib_size,
devvp,
blksize,
arg_flags,
arg_tbufsz,
hfs_sync_metadata, hfsmp->hfs_mp);
- buf_brelse(jinfo_bp);
+ if (write_jibp) {
+ buf_bwrite(jinfo_bp);
+ } else {
+ buf_brelse(jinfo_bp);
+ }
jinfo_bp = NULL;
jibp = NULL;
if (mdb_offset == 0) {
mdb_offset = (daddr64_t)((embeddedOffset / blksize) + HFS_PRI_SECTOR(blksize));
}
- retval = (int)buf_meta_bread(devvp, mdb_offset, blksize, cred, &bp);
+ bp = NULL;
+ retval = (int)buf_meta_bread(devvp,
+ HFS_PHYSBLK_ROUNDDOWN(mdb_offset, hfsmp->hfs_log_per_phys),
+ hfsmp->hfs_physical_block_size, cred, &bp);
if (retval) {
- buf_brelse(bp);
+ if (bp) {
+ buf_brelse(bp);
+ }
printf("hfs: failed to reload the mdb after opening the journal (retval %d)!\n",
retval);
return retval;
}
- bcopy((char *)buf_dataptr(bp) + HFS_PRI_OFFSET(blksize), mdbp, 512);
+ bcopy((char *)buf_dataptr(bp) + HFS_PRI_OFFSET(hfsmp->hfs_physical_block_size), mdbp, 512);
buf_brelse(bp);
bp = NULL;
}
hfs_late_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp, void *_args)
{
JournalInfoBlock *jibp;
- struct buf *jinfo_bp, *bp;
+ struct buf *jinfo_bp;
int sectors_per_fsblock, arg_flags=0, arg_tbufsz=0;
- int retval, need_flush = 0, write_jibp = 0;
+ int retval, write_jibp = 0, recreate_journal = 0;
struct vnode *devvp;
struct cat_attr jib_attr, jattr;
struct cat_fork jib_fork, jfork;
ExtendedVCB *vcb;
- u_long fid;
+ u_int32_t fid;
struct hfs_mount_args *args = _args;
+ u_int32_t jib_flags;
+ u_int64_t jib_offset;
+ u_int64_t jib_size;
devvp = hfsmp->hfs_devvp;
vcb = HFSTOVCB(hfsmp);
vcb->vcbJinfoBlock = jib_fork.cf_extents[0].startBlock;
vhp->journalInfoBlock = SWAP_BE32(jib_fork.cf_extents[0].startBlock);
+ recreate_journal = 1;
}
- sectors_per_fsblock = SWAP_BE32(vhp->blockSize) / hfsmp->hfs_phys_block_size;
+ sectors_per_fsblock = SWAP_BE32(vhp->blockSize) / hfsmp->hfs_logical_block_size;
+ jinfo_bp = NULL;
retval = (int)buf_meta_bread(devvp,
- (daddr64_t)(vcb->hfsPlusIOPosOffset / hfsmp->hfs_phys_block_size +
- (SWAP_BE32(vhp->journalInfoBlock)*sectors_per_fsblock)),
- SWAP_BE32(vhp->blockSize), NOCRED, &jinfo_bp);
+ (vcb->hfsPlusIOPosOffset / hfsmp->hfs_logical_block_size +
+ ((u_int64_t)SWAP_BE32(vhp->journalInfoBlock)*sectors_per_fsblock)),
+ hfsmp->hfs_physical_block_size, NOCRED, &jinfo_bp);
if (retval) {
+ if (jinfo_bp) {
+ buf_brelse(jinfo_bp);
+ }
printf("hfs: can't read journal info block. disabling journaling.\n");
vcb->vcbAtrb &= ~kHFSVolumeJournaledMask;
return 0;
}
jibp = (JournalInfoBlock *)buf_dataptr(jinfo_bp);
- jibp->flags = SWAP_BE32(jibp->flags);
- jibp->offset = SWAP_BE64(jibp->offset);
- jibp->size = SWAP_BE64(jibp->size);
+ jib_flags = SWAP_BE32(jibp->flags);
+ jib_offset = SWAP_BE64(jibp->offset);
+ jib_size = SWAP_BE64(jibp->size);
fid = GetFileInfo(vcb, kRootDirID, ".journal", &jattr, &jfork);
if (fid == 0 || jfork.cf_extents[0].startBlock == 0 || jfork.cf_size == 0) {
hfsmp->hfs_jnlfileid = fid;
// make sure the journal file begins where we think it should.
- if ((jibp->offset / (u_int64_t)vcb->blockSize) != jfork.cf_extents[0].startBlock) {
+ if ((jib_flags & kJIJournalInFSMask) && (jib_offset / (u_int64_t)vcb->blockSize) != jfork.cf_extents[0].startBlock) {
printf("hfs: The journal file moved (was: %lld; is: %d). Fixing up\n",
- (jibp->offset / (u_int64_t)vcb->blockSize), jfork.cf_extents[0].startBlock);
+ (jib_offset / (u_int64_t)vcb->blockSize), jfork.cf_extents[0].startBlock);
- jibp->offset = (u_int64_t)jfork.cf_extents[0].startBlock * (u_int64_t)vcb->blockSize;
+ jib_offset = (u_int64_t)jfork.cf_extents[0].startBlock * (u_int64_t)vcb->blockSize;
write_jibp = 1;
+ recreate_journal = 1;
}
// check the size of the journal file.
- if (jibp->size != (u_int64_t)jfork.cf_extents[0].blockCount*vcb->blockSize) {
+ if (jib_size != (u_int64_t)jfork.cf_extents[0].blockCount*vcb->blockSize) {
printf("hfs: The journal file changed size! (was %lld; is %lld). Fixing up.\n",
- jibp->size, (u_int64_t)jfork.cf_extents[0].blockCount*vcb->blockSize);
+ jib_size, (u_int64_t)jfork.cf_extents[0].blockCount*vcb->blockSize);
- jibp->size = (u_int64_t)jfork.cf_extents[0].blockCount * vcb->blockSize;
+ jib_size = (u_int64_t)jfork.cf_extents[0].blockCount * vcb->blockSize;
write_jibp = 1;
+ recreate_journal = 1;
}
- if (jibp->flags & kJIJournalInFSMask) {
+ if (jib_flags & kJIJournalInFSMask) {
hfsmp->jvp = hfsmp->hfs_devvp;
+ jib_offset += (off_t)vcb->hfsPlusIOPosOffset;
} else {
- printf("hfs: journal not stored in fs! don't know what to do.\n");
+ const char *dev_name;
+ int need_init = 0;
+
+ dev_name = vnode_name(devvp);
+ if (dev_name == NULL) {
+ dev_name = "unknown-dev";
+ }
+
+ // since the journal is empty, just use any available external journal
+ *((char *)&jibp->ext_jnl_uuid[0]) = '\0';
+
+ // this fills in the uuid of the device we actually get
+ hfsmp->jvp = open_journal_dev(dev_name,
+ !(jib_flags & kJIJournalNeedInitMask),
+ (char *)&jibp->ext_jnl_uuid[0],
+ (char *)&jibp->machine_serial_num[0],
+ jib_size,
+ hfsmp->hfs_logical_block_size,
+ &need_init);
+ if (hfsmp->jvp == NULL) {
buf_brelse(jinfo_bp);
- return EINVAL;
+ return EROFS;
+ } else {
+ if (IOBSDGetPlatformSerialNumber(&jibp->machine_serial_num[0], sizeof(jibp->machine_serial_num)) != KERN_SUCCESS) {
+ strlcpy(&jibp->machine_serial_num[0], "unknown-machine-serial-num", sizeof(jibp->machine_serial_num));
+ }
+ }
+ jib_offset = 0;
+ recreate_journal = 1;
+ write_jibp = 1;
+ if (need_init) {
+ jib_flags |= kJIJournalNeedInitMask;
+ }
}
// save this off for the hack-y check in hfs_remove()
- hfsmp->jnl_start = jibp->offset / SWAP_BE32(vhp->blockSize);
- hfsmp->jnl_size = jibp->size;
+ hfsmp->jnl_start = jib_offset / SWAP_BE32(vhp->blockSize);
+ hfsmp->jnl_size = jib_size;
if ((hfsmp->hfs_flags & HFS_READ_ONLY) && (vfs_flags(hfsmp->hfs_mp) & MNT_ROOTFS) == 0) {
// if the file system is read-only, check if the journal is empty.
// if it is, then we can allow the mount. otherwise we have to
// return failure.
retval = journal_is_clean(hfsmp->jvp,
- jibp->offset + (off_t)vcb->hfsPlusIOPosOffset,
- jibp->size,
+ jib_offset,
+ jib_size,
devvp,
- hfsmp->hfs_phys_block_size);
+ hfsmp->hfs_logical_block_size);
hfsmp->jnl = NULL;
buf_brelse(jinfo_bp);
if (retval) {
+ const char *name = vnode_getname(devvp);
printf("hfs: late journal init: volume on %s is read-only and journal is dirty. Can not mount volume.\n",
- vnode_name(devvp));
+ name ? name : "");
+ if (name)
+ vnode_putname(name);
}
return retval;
}
- if (jibp->flags & kJIJournalNeedInitMask) {
+ if ((jib_flags & kJIJournalNeedInitMask) || recreate_journal) {
printf("hfs: Initializing the journal (joffset 0x%llx sz 0x%llx)...\n",
- jibp->offset + (off_t)vcb->hfsPlusIOPosOffset, jibp->size);
+ jib_offset, jib_size);
hfsmp->jnl = journal_create(hfsmp->jvp,
- jibp->offset + (off_t)vcb->hfsPlusIOPosOffset,
- jibp->size,
+ jib_offset,
+ jib_size,
devvp,
- hfsmp->hfs_phys_block_size,
+ hfsmp->hfs_logical_block_size,
arg_flags,
arg_tbufsz,
hfs_sync_metadata, hfsmp->hfs_mp);
// no need to start a transaction here... if this were to fail
// we'd just re-init it on the next mount.
- jibp->flags &= ~kJIJournalNeedInitMask;
+ jib_flags &= ~kJIJournalNeedInitMask;
write_jibp = 1;
} else {
arg_flags |= JOURNAL_RESET;
//printf("hfs: Opening the journal (joffset 0x%llx sz 0x%llx vhp_blksize %d)...\n",
- // jibp->offset + (off_t)vcb->hfsPlusIOPosOffset,
- // jibp->size, SWAP_BE32(vhp->blockSize));
+ // jib_offset,
+ // jib_size, SWAP_BE32(vhp->blockSize));
hfsmp->jnl = journal_open(hfsmp->jvp,
- jibp->offset + (off_t)vcb->hfsPlusIOPosOffset,
- jibp->size,
+ jib_offset,
+ jib_size,
devvp,
- hfsmp->hfs_phys_block_size,
+ hfsmp->hfs_logical_block_size,
arg_flags,
arg_tbufsz,
hfs_sync_metadata, hfsmp->hfs_mp);
if (write_jibp) {
- jibp->flags = SWAP_BE32(jibp->flags);
- jibp->offset = SWAP_BE64(jibp->offset);
- jibp->size = SWAP_BE64(jibp->size);
+ jibp->flags = SWAP_BE32(jib_flags);
+ jibp->offset = SWAP_BE64(jib_offset);
+ jibp->size = SWAP_BE64(jib_size);
buf_bwrite(jinfo_bp);
} else {
jinfo_bp = NULL;
jibp = NULL;
- //printf("journal @ 0x%x\n", hfsmp->jnl);
+ //printf("hfs: journal @ 0x%x\n", hfsmp->jnl);
// if we expected the journal to be there and we couldn't
// create it or open it then we have to bail out.
u_int64_t temp;
u_int64_t filesize;
u_int32_t blk;
- int items;
+ int items, really_do_it=1;
vcb = HFSTOVCB(hfsmp);
fs_size = (u_int64_t)vcb->blockSize * (u_int64_t)vcb->totalBlocks;
/*
* For volumes less than 10 GB, don't bother.
*/
- if (fs_size < ((u_int64_t)10 * GIGABYTE))
- return;
+ if (fs_size < ((u_int64_t)10 * GIGABYTE)) {
+ really_do_it = 0;
+ }
+
/*
* Skip non-journaled volumes as well.
*/
- if (hfsmp->jnl == NULL)
- return;
+ if (hfsmp->jnl == NULL) {
+ really_do_it = 0;
+ }
/*
- * Start with allocation bitmap (a fixed size).
+ * Start with space for the boot blocks and Volume Header.
+ * 1536 = byte offset from start of volume to end of volume header:
+ * 1024 bytes is the offset from the start of the volume to the
+ * start of the volume header (defined by the volume format)
+ * + 512 bytes (the size of the volume header).
*/
- zonesize = roundup(vcb->totalBlocks / 8, vcb->vcbVBMIOSize);
-
+ zonesize = roundup(1536, hfsmp->blockSize);
+
/*
- * Overflow Extents file gets 4 MB per 100 GB.
+ * Add the on-disk size of allocation bitmap.
*/
- items = fs_size / ((u_int64_t)100 * GIGABYTE);
- filesize = (u_int64_t)(items + 1) * OVERFLOW_DEFAULT_SIZE;
- if (filesize > OVERFLOW_MAXIMUM_SIZE)
- filesize = OVERFLOW_MAXIMUM_SIZE;
- zonesize += filesize;
- hfsmp->hfs_overflow_maxblks = filesize / vcb->blockSize;
-
+ zonesize += hfsmp->hfs_allocation_cp->c_datafork->ff_blocks * hfsmp->blockSize;
+
+ /*
+ * Add space for the Journal Info Block and Journal (if they're in
+ * this file system).
+ */
+ if (hfsmp->jnl && hfsmp->jvp == hfsmp->hfs_devvp) {
+ zonesize += hfsmp->blockSize + hfsmp->jnl_size;
+ }
+
/*
- * Plan for at least 8 MB of journal for each
- * 100 GB of disk space (up to a 512 MB).
+ * Add the existing size of the Extents Overflow B-tree.
+ * (It rarely grows, so don't bother reserving additional room for it.)
*/
- items = fs_size / ((u_int64_t)100 * GIGABYTE);
- filesize = (u_int64_t)(items + 1) * JOURNAL_DEFAULT_SIZE;
- if (filesize > JOURNAL_MAXIMUM_SIZE)
- filesize = JOURNAL_MAXIMUM_SIZE;
- zonesize += filesize;
-
+ zonesize += hfsmp->hfs_extents_cp->c_datafork->ff_blocks * hfsmp->blockSize;
+
/*
- * Catalog file gets 10 MB per 1 GB.
- *
- * How about considering the current catalog size (used nodes * node size)
- * and the current file data size to help estimate the required
- * catalog size.
+ * If there is an Attributes B-tree, leave room for 11 clumps worth.
+ * newfs_hfs allocates one clump, and leaves a gap of 10 clumps.
+ * When installing a full OS install onto a 20GB volume, we use
+ * 7 to 8 clumps worth of space (depending on packages), so that leaves
+ * us with another 3 or 4 clumps worth before we need another extent.
*/
- filesize = MIN((fs_size / 1024) * 10, GIGABYTE);
- hfsmp->hfs_catalog_maxblks = filesize / vcb->blockSize;
- zonesize += filesize;
-
+ if (hfsmp->hfs_attribute_cp) {
+ zonesize += 11 * hfsmp->hfs_attribute_cp->c_datafork->ff_clumpsize;
+ }
+
+ /*
+ * Leave room for 11 clumps of the Catalog B-tree.
+ * Again, newfs_hfs allocates one clump plus a gap of 10 clumps.
+ * When installing a full OS install onto a 20GB volume, we use
+ * 7 to 8 clumps worth of space (depending on packages), so that leaves
+ * us with another 3 or 4 clumps worth before we need another extent.
+ */
+ zonesize += 11 * hfsmp->hfs_catalog_cp->c_datafork->ff_clumpsize;
+
/*
* Add space for hot file region.
*
/*
* Calculate user quota file requirements.
*/
- items = QF_USERS_PER_GB * (fs_size / GIGABYTE);
- if (items < QF_MIN_USERS)
- items = QF_MIN_USERS;
- else if (items > QF_MAX_USERS)
- items = QF_MAX_USERS;
- if (!powerof2(items)) {
- int x = items;
- items = 4;
- while (x>>1 != 1) {
- x = x >> 1;
- items = items << 1;
+ if (hfsmp->hfs_flags & HFS_QUOTAS) {
+ items = QF_USERS_PER_GB * (fs_size / GIGABYTE);
+ if (items < QF_MIN_USERS)
+ items = QF_MIN_USERS;
+ else if (items > QF_MAX_USERS)
+ items = QF_MAX_USERS;
+ if (!powerof2(items)) {
+ int x = items;
+ items = 4;
+ while (x>>1 != 1) {
+ x = x >> 1;
+ items = items << 1;
+ }
}
- }
- filesize += (items + 1) * sizeof(struct dqblk);
- /*
- * Calculate group quota file requirements.
- *
- */
- items = QF_GROUPS_PER_GB * (fs_size / GIGABYTE);
- if (items < QF_MIN_GROUPS)
- items = QF_MIN_GROUPS;
- else if (items > QF_MAX_GROUPS)
- items = QF_MAX_GROUPS;
- if (!powerof2(items)) {
- int x = items;
- items = 4;
- while (x>>1 != 1) {
- x = x >> 1;
- items = items << 1;
+ filesize += (items + 1) * sizeof(struct dqblk);
+ /*
+ * Calculate group quota file requirements.
+ *
+ */
+ items = QF_GROUPS_PER_GB * (fs_size / GIGABYTE);
+ if (items < QF_MIN_GROUPS)
+ items = QF_MIN_GROUPS;
+ else if (items > QF_MAX_GROUPS)
+ items = QF_MAX_GROUPS;
+ if (!powerof2(items)) {
+ int x = items;
+ items = 4;
+ while (x>>1 != 1) {
+ x = x >> 1;
+ items = items << 1;
+ }
}
+ filesize += (items + 1) * sizeof(struct dqblk);
}
- filesize += (items + 1) * sizeof(struct dqblk);
zonesize += filesize;
/*
* The extra space goes to the catalog file and hot file area.
*/
temp = zonesize;
- zonesize = roundup(zonesize, vcb->vcbVBMIOSize * 8 * vcb->blockSize);
+ zonesize = roundup(zonesize, (u_int64_t)vcb->vcbVBMIOSize * 8 * vcb->blockSize);
+ hfsmp->hfs_min_alloc_start = zonesize / vcb->blockSize;
+ /*
+ * If doing the round up for hfs_min_alloc_start would push us past
+ * totalBlocks, then just reset it back to 0. Though using a value
+ * bigger than totalBlocks would not cause damage in the block allocator
+ * code, this value could get stored in the volume header and make it out
+ * to disk, making the volume header technically corrupt.
+ */
+ if (hfsmp->hfs_min_alloc_start >= hfsmp->totalBlocks) {
+ hfsmp->hfs_min_alloc_start = 0;
+ }
+
+ if (really_do_it == 0) {
+ return;
+ }
+
temp = zonesize - temp; /* temp has extra space */
filesize += temp / 3;
hfsmp->hfs_catalog_maxblks += (temp - (temp / 3)) / vcb->blockSize;
hfsmp->hfs_hotfile_end = hfsmp->hfs_metazone_end;
hfsmp->hfs_hotfile_freeblks = hfs_hotfile_freeblocks(hfsmp);
#if 0
- printf("HFS: metadata zone is %d to %d\n", hfsmp->hfs_metazone_start, hfsmp->hfs_metazone_end);
- printf("HFS: hot file band is %d to %d\n", hfsmp->hfs_hotfile_start, hfsmp->hfs_hotfile_end);
- printf("HFS: hot file band free blocks = %d\n", hfsmp->hfs_hotfile_freeblks);
+ printf("hfs: metadata zone is %d to %d\n", hfsmp->hfs_metazone_start, hfsmp->hfs_metazone_end);
+ printf("hfs: hot file band is %d to %d\n", hfsmp->hfs_hotfile_start, hfsmp->hfs_hotfile_end);
+ printf("hfs: hot file band free blocks = %d\n", hfsmp->hfs_hotfile_freeblks);
#endif
hfsmp->hfs_flags |= HFS_METADATA_ZONE;
}
int
hfs_virtualmetafile(struct cnode *cp)
{
- char * filename;
+ const char * filename;
if (cp->c_parentcnid != kHFSRootFolderID)
return (0);
- filename = cp->c_desc.cd_nameptr;
+ filename = (const char *)cp->c_desc.cd_nameptr;
if (filename == NULL)
return (0);
- if ((strcmp(filename, ".journal") == 0) ||
- (strcmp(filename, ".journal_info_block") == 0) ||
- (strcmp(filename, ".quota.user") == 0) ||
- (strcmp(filename, ".quota.group") == 0) ||
- (strcmp(filename, ".hotfiles.btree") == 0))
+ if ((strncmp(filename, ".journal", sizeof(".journal")) == 0) ||
+ (strncmp(filename, ".journal_info_block", sizeof(".journal_info_block")) == 0) ||
+ (strncmp(filename, ".quota.user", sizeof(".quota.user")) == 0) ||
+ (strncmp(filename, ".quota.group", sizeof(".quota.group")) == 0) ||
+ (strncmp(filename, ".hotfiles.btree", sizeof(".hotfiles.btree")) == 0))
return (1);
return (0);
}
+//
+// Fire off a timed callback to sync the disk if the
+// volume is on ejectable media.
+//
+ __private_extern__
+void
+hfs_sync_ejectable(struct hfsmount *hfsmp)
+{
+ if (hfsmp->hfs_syncer) {
+ clock_sec_t secs;
+ clock_usec_t usecs;
+ uint64_t now;
+
+ clock_get_calendar_microtime(&secs, &usecs);
+ now = ((uint64_t)secs * 1000000ULL) + (uint64_t)usecs;
+
+ if (hfsmp->hfs_sync_incomplete && hfsmp->hfs_mp->mnt_pending_write_size >= hfsmp->hfs_max_pending_io) {
+ // if we have a sync scheduled but i/o is starting to pile up,
+ // don't call thread_call_enter_delayed() again because that
+ // will defer the sync.
+ return;
+ }
+
+ if (hfsmp->hfs_sync_scheduled == 0) {
+ uint64_t deadline;
+
+ hfsmp->hfs_last_sync_request_time = now;
+
+ clock_interval_to_deadline(HFS_META_DELAY, HFS_MILLISEC_SCALE, &deadline);
+
+ /*
+ * Increment hfs_sync_scheduled on the assumption that we're the
+ * first thread to schedule the timer. If some other thread beat
+ * us, then we'll decrement it. If we *were* the first to
+ * schedule the timer, then we need to keep track that the
+ * callback is waiting to complete.
+ */
+ OSIncrementAtomic((volatile SInt32 *)&hfsmp->hfs_sync_scheduled);
+ if (thread_call_enter_delayed(hfsmp->hfs_syncer, deadline))
+ OSDecrementAtomic((volatile SInt32 *)&hfsmp->hfs_sync_scheduled);
+ else
+ OSIncrementAtomic((volatile SInt32 *)&hfsmp->hfs_sync_incomplete);
+ }
+ }
+}
+
+
__private_extern__
int
hfs_start_transaction(struct hfsmount *hfsmp)
{
- int ret;
+ int ret, unlock_on_err=0;
+ void * thread = current_thread();
+
+#ifdef HFS_CHECK_LOCK_ORDER
+ /*
+ * You cannot start a transaction while holding a system
+ * file lock. (unless the transaction is nested.)
+ */
+ if (hfsmp->jnl && journal_owner(hfsmp->jnl) != thread) {
+ if (hfsmp->hfs_catalog_cp && hfsmp->hfs_catalog_cp->c_lockowner == thread) {
+ panic("hfs_start_transaction: bad lock order (cat before jnl)\n");
+ }
+ if (hfsmp->hfs_attribute_cp && hfsmp->hfs_attribute_cp->c_lockowner == thread) {
+ panic("hfs_start_transaction: bad lock order (attr before jnl)\n");
+ }
+ if (hfsmp->hfs_extents_cp && hfsmp->hfs_extents_cp->c_lockowner == thread) {
+ panic("hfs_start_transaction: bad lock order (ext before jnl)\n");
+ }
+ }
+#endif /* HFS_CHECK_LOCK_ORDER */
- if (hfsmp->jnl == NULL || journal_owner(hfsmp->jnl) != current_thread()) {
+ if (hfsmp->jnl == NULL || journal_owner(hfsmp->jnl) != thread) {
lck_rw_lock_shared(&hfsmp->hfs_global_lock);
+ OSAddAtomic(1, (SInt32 *)&hfsmp->hfs_active_threads);
+ unlock_on_err = 1;
}
+ /* If a downgrade to read-only mount is in progress, no other
+ * process than the downgrade process is allowed to modify
+ * the file system.
+ */
+ if ((hfsmp->hfs_flags & HFS_RDONLY_DOWNGRADE) &&
+ (hfsmp->hfs_downgrading_proc != thread)) {
+ ret = EROFS;
+ goto out;
+ }
+
if (hfsmp->jnl) {
ret = journal_start_transaction(hfsmp->jnl);
if (ret == 0) {
ret = 0;
}
- if (ret != 0) {
- lck_rw_done(&hfsmp->hfs_global_lock);
+out:
+ if (ret != 0 && unlock_on_err) {
+ lck_rw_unlock_shared(&hfsmp->hfs_global_lock);
+ OSAddAtomic(-1, (SInt32 *)&hfsmp->hfs_active_threads);
}
return ret;
}
if (need_unlock) {
- lck_rw_done(&hfsmp->hfs_global_lock);
+ OSAddAtomic(-1, (SInt32 *)&hfsmp->hfs_active_threads);
+ lck_rw_unlock_shared(&hfsmp->hfs_global_lock);
+ hfs_sync_ejectable(hfsmp);
}
return ret;
}
+
+
+__private_extern__
+int
+hfs_journal_flush(struct hfsmount *hfsmp)
+{
+ int ret;
+
+ if (hfsmp->jnl) {
+ lck_rw_lock_shared(&hfsmp->hfs_global_lock);
+ ret = journal_flush(hfsmp->jnl);
+ lck_rw_unlock_shared(&hfsmp->hfs_global_lock);
+ } else {
+ ret = 0;
+ }
+
+ return ret;
+}
+
+
+/*
+ * hfs_erase_unused_nodes
+ *
+ * Check wheter a volume may suffer from unused Catalog B-tree nodes that
+ * are not zeroed (due to <rdar://problem/6947811>). If so, just write
+ * zeroes to the unused nodes.
+ *
+ * How do we detect when a volume needs this repair? We can't always be
+ * certain. If a volume was created after a certain date, then it may have
+ * been created with the faulty newfs_hfs. Since newfs_hfs only created one
+ * clump, we can assume that if a Catalog B-tree is larger than its clump size,
+ * that means that the entire first clump must have been written to, which means
+ * there shouldn't be unused and unwritten nodes in that first clump, and this
+ * repair is not needed.
+ *
+ * We have defined a bit in the Volume Header's attributes to indicate when the
+ * unused nodes have been repaired. A newer newfs_hfs will set this bit.
+ * As will fsck_hfs when it repairs the unused nodes.
+ */
+__private_extern__
+int hfs_erase_unused_nodes(struct hfsmount *hfsmp)
+{
+ int result;
+ struct filefork *catalog;
+ int lockflags;
+
+ if (hfsmp->vcbAtrb & kHFSUnusedNodeFixMask)
+ {
+ /* This volume has already been checked and repaired. */
+ return 0;
+ }
+
+ if ((hfsmp->localCreateDate < kHFSUnusedNodesFixDate))
+ {
+ /* This volume is too old to have had the problem. */
+ hfsmp->vcbAtrb |= kHFSUnusedNodeFixMask;
+ return 0;
+ }
+
+ catalog = hfsmp->hfs_catalog_cp->c_datafork;
+ if (catalog->ff_size > catalog->ff_clumpsize)
+ {
+ /* The entire first clump must have been in use at some point. */
+ hfsmp->vcbAtrb |= kHFSUnusedNodeFixMask;
+ return 0;
+ }
+
+ /*
+ * If we get here, we need to zero out those unused nodes.
+ *
+ * We start a transaction and lock the catalog since we're going to be
+ * making on-disk changes. But note that BTZeroUnusedNodes doens't actually
+ * do its writing via the journal, because that would be too much I/O
+ * to fit in a transaction, and it's a pain to break it up into multiple
+ * transactions. (It behaves more like growing a B-tree would.)
+ */
+ printf("hfs_erase_unused_nodes: updating volume %s.\n", hfsmp->vcbVN);
+ result = hfs_start_transaction(hfsmp);
+ if (result)
+ goto done;
+ lockflags = hfs_systemfile_lock(hfsmp, SFL_CATALOG, HFS_EXCLUSIVE_LOCK);
+ result = BTZeroUnusedNodes(catalog);
+ vnode_waitforwrites(hfsmp->hfs_catalog_vp, 0, 0, 0, "hfs_erase_unused_nodes");
+ hfs_systemfile_unlock(hfsmp, lockflags);
+ hfs_end_transaction(hfsmp);
+ if (result == 0)
+ hfsmp->vcbAtrb |= kHFSUnusedNodeFixMask;
+ printf("hfs_erase_unused_nodes: done updating volume %s.\n", hfsmp->vcbVN);
+
+done:
+ return result;
+}
projects / apple / xnu.git / blobdiff