/*
- * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2009 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
*
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef __HFS__
#define HFS_SPARSE_DEV 1
+#if DEBUG
+#define HFS_CHECK_LOCK_ORDER 1
+#endif
+
#include <sys/appleapiopts.h>
#ifdef KERNEL
#ifdef __APPLE_API_PRIVATE
#include <sys/param.h>
-#include <sys/lock.h>
#include <sys/queue.h>
#include <sys/mount.h>
-#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/quota.h>
#include <sys/dirent.h>
#include <sys/event.h>
+#include <kern/thread_call.h>
+
+#include <kern/locks.h>
#include <vfs/vfs_journal.h>
#include <hfs/hfs_encodings.h>
#include <hfs/hfs_hotfiles.h>
-
-struct uio; // This is more effective than #include <sys/uio.h> in case KERNEL is undefined...
-struct hfslockf; /* For advisory locking */
-
/*
* Just reported via MIG interface.
*/
#define HFS_MAX_DEFERED_ALLOC (1024*1024)
-// 32 gigs is a "big" file (i.e. one that when deleted
+// 400 megs is a "big" file (i.e. one that when deleted
// would touch enough data that we should break it into
-// multiple separate transactions
-#define HFS_BIGFILE_SIZE (32LL * 1024LL * 1024LL * 1024LL)
+// multiple separate transactions)
+#define HFS_BIGFILE_SIZE (400LL * 1024LL * 1024LL)
enum { kMDBSize = 512 }; /* Size of I/O transfer to read entire MDB */
enum { kMasterDirectoryBlock = 2 }; /* MDB offset on disk in 512-byte blocks */
enum { kMDBOffset = kMasterDirectoryBlock * 512 }; /* MDB offset on disk in bytes */
-enum {
- kUnknownID = 0,
- kRootParID = 1,
- kRootDirID = 2
-};
+#define kRootDirID kHFSRootFolderID
-enum {
- kDataFork,
- kRsrcFork,
- kDirectory
-};
/* number of locked buffer caches to hold for b-tree meta data */
#define kMaxLockedMetaBuffers 32
-/*
- * File type and creator for symbolic links
- */
-enum {
- kSymLinkFileType = 0x736C6E6B, /* 'slnk' */
- kSymLinkCreator = 0x72686170 /* 'rhap' */
-};
-
-
extern struct timezone gTimeZone;
* volume size, all capped at a certain fixed level
*/
-#define HFS_ROOTLOWDISKTRIGGERFRACTION 5
+#define HFS_ROOTVERYLOWDISKTRIGGERFRACTION 5
+#define HFS_ROOTVERYLOWDISKTRIGGERLEVEL ((u_int64_t)(125*1024*1024))
+#define HFS_ROOTLOWDISKTRIGGERFRACTION 10
#define HFS_ROOTLOWDISKTRIGGERLEVEL ((u_int64_t)(250*1024*1024))
-#define HFS_ROOTLOWDISKSHUTOFFFRACTION 6
+#define HFS_ROOTLOWDISKSHUTOFFFRACTION 11
#define HFS_ROOTLOWDISKSHUTOFFLEVEL ((u_int64_t)(375*1024*1024))
-#define HFS_LOWDISKTRIGGERFRACTION 1
-#define HFS_LOWDISKTRIGGERLEVEL ((u_int64_t)(50*1024*1024))
-#define HFS_LOWDISKSHUTOFFFRACTION 2
-#define HFS_LOWDISKSHUTOFFLEVEL ((u_int64_t)(75*1024*1024))
+#define HFS_VERYLOWDISKTRIGGERFRACTION 1
+#define HFS_VERYLOWDISKTRIGGERLEVEL ((u_int64_t)(100*1024*1024))
+#define HFS_LOWDISKTRIGGERFRACTION 2
+#define HFS_LOWDISKTRIGGERLEVEL ((u_int64_t)(150*1024*1024))
+#define HFS_LOWDISKSHUTOFFFRACTION 3
+#define HFS_LOWDISKSHUTOFFLEVEL ((u_int64_t)(200*1024*1024))
/* Internal Data structures*/
-struct vcb_t {
- u_int16_t vcbSigWord;
- int16_t vcbAtrb;
- int16_t vcbFlags;
- int16_t vcbspare;
- u_int32_t vcbJinfoBlock;
-
- u_int32_t vcbCrDate;
- u_int32_t vcbLsMod;
- u_int32_t vcbVolBkUp;
-
- int32_t vcbFilCnt;
- int32_t vcbDirCnt;
- u_int32_t blockSize; /* size of allocation blocks */
- u_int32_t totalBlocks; /* total allocation blocks */
- u_int32_t freeBlocks; /* free allocation blocks */
- u_int32_t nextAllocation; /* start of next allocation search */
- int32_t vcbClpSiz;
- u_int32_t vcbNxtCNID;
- u_int32_t vcbCNIDGen;
- int32_t vcbWrCnt;
-
- int32_t vcbFndrInfo[8];
-
- u_int64_t encodingsBitmap; /* HFS Plus only */
-
- u_int16_t vcbNmFls; /* HFS only */
- u_int16_t vcbNmRtDirs; /* HFS only */
- int16_t vcbVBMSt; /* HFS only */
- int16_t vcbAlBlSt; /* HFS only */
-
- struct vnode * extentsRefNum;
- struct vnode * catalogRefNum;
- struct vnode * allocationsRefNum;
-
- u_int8_t vcbVN[256]; /* volume name in UTF-8 */
- u_int32_t volumeNameEncodingHint;
- u_int32_t hfsPlusIOPosOffset; /* Disk block where HFS+ starts */
- u_int32_t vcbVBMIOSize; /* volume bitmap I/O size */
-
- /* cache of largest known free extents */
- u_int32_t vcbFreeExtCnt;
- HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
-
- u_int32_t reserveBlocks; /* free block reserve */
- u_int32_t loanedBlocks; /* blocks on loan for delayed allocations */
-
- u_int32_t localCreateDate; /* creation times for HFS+ volumes are in local time */
- simple_lock_data_t vcbSimpleLock; /* simple lock to allow concurrent access to vcb data */
-};
-typedef struct vcb_t ExtendedVCB;
-
-
-#define kHFS_DamagedVolume 0x1 /* This volume has errors, unmount dirty */
-
-/* XXX */
-#define MARK_VOLUMEDAMAGED(fcb)
-
-/*
- * NOTE: The code relies on being able to cast an ExtendedVCB* to a vfsVCB* in order
- * to gain access to the mount point pointer from a pointer
- * to an ExtendedVCB. DO NOT INSERT OTHER FIELDS BEFORE THE vcb FIELD!!
- *
- * vcbFlags, vcbLsMod, vcbFilCnt, vcbDirCnt, vcbNxtCNID, etc
- * are locked by the hfs_lock simple lock.
- */
-typedef struct vfsVCB {
- ExtendedVCB vcb_vcb;
- struct hfsmount *vcb_hfsmp; /* Pointer to hfsmount structure */
-} vfsVCB_t;
-
-
-
/* This structure describes the HFS specific mount structure data. */
typedef struct hfsmount {
- u_int32_t hfs_flags; /* see below */
-
+ u_int32_t hfs_flags; /* see below */
+
/* Physical Description */
- u_long hfs_phys_block_count; /* Num of PHYSICAL blocks of volume */
- u_long hfs_phys_block_size; /* Always a multiple of 512 */
+ u_int32_t hfs_logical_block_size; /* Logical block size of the disk as reported by ioctl(DKIOCGETBLOCKSIZE), always a multiple of 512 */
+ daddr64_t hfs_logical_block_count; /* Number of logical blocks on the disk */
+ daddr64_t hfs_alt_id_sector; /* location of alternate VH/MDB */
+ u_int32_t hfs_physical_block_size; /* Physical block size of the disk as reported by ioctl(DKIOCGETPHYSICALBLOCKSIZE) */
+ u_int32_t hfs_log_per_phys; /* Number of logical blocks per physical block size */
/* Access to VFS and devices */
struct mount *hfs_mp; /* filesystem vfs structure */
struct vnode *hfs_devvp; /* block device mounted vnode */
- dev_t hfs_raw_dev; /* device mounted */
- struct netexport hfs_export; /* Export information */
- u_int32_t hfs_logBlockSize; /* Size of buffer cache buffer for I/O */
+ struct vnode * hfs_extents_vp;
+ struct vnode * hfs_catalog_vp;
+ struct vnode * hfs_allocation_vp;
+ struct vnode * hfs_attribute_vp;
+ struct vnode * hfs_startup_vp;
+ struct vnode * hfs_attrdata_vp; /* pseudo file */
+ struct cnode * hfs_extents_cp;
+ struct cnode * hfs_catalog_cp;
+ struct cnode * hfs_allocation_cp;
+ struct cnode * hfs_attribute_cp;
+ struct cnode * hfs_startup_cp;
+ dev_t hfs_raw_dev; /* device mounted */
+ u_int32_t hfs_logBlockSize; /* Size of buffer cache buffer for I/O */
/* Default values for HFS standard and non-init access */
- uid_t hfs_uid; /* uid to set as owner of the files */
- gid_t hfs_gid; /* gid to set as owner of the files */
- mode_t hfs_dir_mask; /* mask to and with directory protection bits */
- mode_t hfs_file_mask; /* mask to and with file protection bits */
- u_long hfs_encoding; /* Defualt encoding for non hfs+ volumes */
-
- /* HFS Specific */
- struct vfsVCB hfs_vcb;
- struct cat_desc hfs_privdir_desc;
- struct cat_attr hfs_privdir_attr;
+ uid_t hfs_uid; /* uid to set as owner of the files */
+ gid_t hfs_gid; /* gid to set as owner of the files */
+ mode_t hfs_dir_mask; /* mask to and with directory protection bits */
+ mode_t hfs_file_mask; /* mask to and with file protection bits */
+ u_int32_t hfs_encoding; /* Default encoding for non hfs+ volumes */
+
+ /* Persistent fields (on disk, dynamic) */
+ time_t hfs_mtime; /* file system last modification time */
+ u_int32_t hfs_filecount; /* number of files in file system */
+ u_int32_t hfs_dircount; /* number of directories in file system */
+ u_int32_t freeBlocks; /* free allocation blocks */
+ u_int32_t nextAllocation; /* start of next allocation search */
+ u_int32_t sparseAllocation; /* start of allocations for sparse devices */
+ u_int32_t vcbNxtCNID; /* next unused catalog node ID - protected by catalog lock */
+ u_int32_t vcbWrCnt; /* file system write count */
+ u_int64_t encodingsBitmap; /* in-use encodings */
+ u_int16_t vcbNmFls; /* HFS Only - root dir file count */
+ u_int16_t vcbNmRtDirs; /* HFS Only - root dir directory count */
+
+ /* Persistent fields (on disk, static) */
+ u_int16_t vcbSigWord;
+ int16_t vcbFlags; /* Runtime flag to indicate if volume is dirty/clean */
+ u_int32_t vcbAtrb;
+ u_int32_t vcbJinfoBlock;
+ time_t hfs_itime; /* file system creation time */
+ time_t hfs_btime; /* file system last backup time */
+ u_int32_t blockSize; /* size of allocation blocks */
+ u_int32_t totalBlocks; /* total allocation blocks */
+ u_int32_t allocLimit; /* Do not allocate this block or beyond */
+ /*
+ * NOTE: When resizing a volume to make it smaller, allocLimit is set to the allocation
+ * block number which will contain the new alternate volume header. At all other times,
+ * allocLimit is set to totalBlocks. The allocation code uses allocLimit instead of
+ * totalBlocks to limit which blocks may be allocated, so that during a resize, we don't
+ * put new content into the blocks we're trying to truncate away.
+ */
+ int32_t vcbClpSiz;
+ u_int32_t vcbFndrInfo[8];
+ int16_t vcbVBMSt; /* HFS only */
+ int16_t vcbAlBlSt; /* HFS only */
+
+ /* vcb stuff */
+ u_int8_t vcbVN[256]; /* volume name in UTF-8 */
+ u_int32_t volumeNameEncodingHint;
+ u_int32_t hfsPlusIOPosOffset; /* Disk block where HFS+ starts */
+ u_int32_t vcbVBMIOSize; /* volume bitmap I/O size */
+
+ /* cache of largest known free extents */
+ u_int32_t vcbFreeExtCnt;
+ HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
+
+ u_int32_t reserveBlocks; /* free block reserve */
+ u_int32_t loanedBlocks; /* blocks on loan for delayed allocations */
+
+ u_int32_t localCreateDate; /* creation times for HFS+ volumes are in local time */
+
+ /*
+ * HFS+ Private system directories (two). Any access
+ * (besides looking at the cd_cnid) requires holding
+ * the Catalog File lock.
+ */
+ struct cat_desc hfs_private_desc[2];
+ struct cat_attr hfs_private_attr[2];
+
u_int32_t hfs_metadata_createdate;
hfs_to_unicode_func_t hfs_get_unicode;
unicode_to_hfs_func_t hfs_get_hfsname;
u_int32_t jnl_size;
u_int32_t hfs_jnlfileid;
u_int32_t hfs_jnlinfoblkid;
- volatile int readers;
- volatile int blocker;
+ lck_rw_t hfs_global_lock;
+ u_int32_t hfs_global_lock_nesting;
/* Notification variables: */
- unsigned long hfs_notification_conditions;
+ u_int32_t hfs_notification_conditions;
+ u_int32_t hfs_freespace_notify_dangerlimit;
u_int32_t hfs_freespace_notify_warninglimit;
u_int32_t hfs_freespace_notify_desiredlevel;
+ /* time mounted and last mounted mod time "snapshot" */
+ time_t hfs_mount_time;
+ time_t hfs_last_mounted_mtime;
+
/* Metadata allocation zone variables: */
u_int32_t hfs_metazone_start;
u_int32_t hfs_metazone_end;
u_int32_t hfs_hotfile_start;
u_int32_t hfs_hotfile_end;
+ u_int32_t hfs_min_alloc_start;
+ u_int32_t hfs_freed_block_count;
int hfs_hotfile_freeblks;
int hfs_hotfile_maxblks;
int hfs_overflow_maxblks;
int hfs_catalog_maxblks;
/* Hot File Clustering variables: */
+ lck_mtx_t hfc_mutex; /* serialize hot file stages */
enum hfc_stage hfc_stage; /* what are we up to... */
time_t hfc_timebase; /* recording period start time */
time_t hfc_timeout; /* recording period stop time */
#ifdef HFS_SPARSE_DEV
/* Sparse device variables: */
struct vnode * hfs_backingfs_rootvp;
+ u_int32_t hfs_last_backingstatfs;
int hfs_sparsebandblks;
+ u_int64_t hfs_backingfs_maxblocks;
#endif
+ size_t hfs_max_inline_attrsize;
+
+ lck_mtx_t hfs_mutex; /* protects access to hfsmount data */
+ void *hfs_freezing_proc; /* who froze the fs */
+ void *hfs_downgrading_proc; /* process who's downgrading to rdonly */
+ lck_rw_t hfs_insync; /* protects sync/freeze interaction */
+
+ /* Resize variables: */
+ u_int32_t hfs_resize_filesmoved;
+ u_int32_t hfs_resize_totalfiles;
+
+ /* Per mount cnode hash variables: */
+ lck_mtx_t hfs_chash_mutex; /* protects access to cnode hash table */
+ u_long hfs_cnodehash; /* size of cnode hash table - 1 */
+ LIST_HEAD(cnodehashhead, cnode) *hfs_cnodehashtbl; /* base of cnode hash */
+
+
+ /*
+ * About the sync counters:
+ * hfs_sync_scheduled keeps track whether a timer was scheduled but we
+ * haven't started processing the callback (i.e. we
+ * haven't begun the flush). This will be non-zero
+ * even if the callback has been invoked, before we
+ * start the flush.
+ * hfs_sync_incomplete keeps track of the number of callbacks that have
+ * not completed yet (including callbacks not yet
+ * invoked). We cannot safely unmount until this
+ * drops to zero.
+ *
+ * In both cases, we use counters, not flags, so that we can avoid
+ * taking locks.
+ */
+ int32_t hfs_sync_scheduled;
+ int32_t hfs_sync_incomplete;
+ u_int64_t hfs_last_sync_request_time;
+ u_int64_t hfs_last_sync_time;
+ u_int32_t hfs_active_threads;
+ u_int64_t hfs_max_pending_io;
+
+ thread_call_t hfs_syncer; // removeable devices get sync'ed by this guy
+
} hfsmount_t;
+#define HFS_META_DELAY (100)
+#define HFS_MILLISEC_SCALE (1000*1000)
+
+typedef hfsmount_t ExtendedVCB;
+
+/* Aliases for legacy (Mac OS 9) field names */
+#define vcbCrDate hfs_itime
+#define vcbLsMod hfs_mtime
+#define vcbVolBkUp hfs_btime
+#define extentsRefNum hfs_extents_vp
+#define catalogRefNum hfs_catalog_vp
+#define allocationsRefNum hfs_allocation_vp
+#define vcbFilCnt hfs_filecount
+#define vcbDirCnt hfs_dircount
+
+/* Inline functions to set/reset vcbFlags. Upper 8 bits indicate if the volume
+ * header/VCB is clean/dirty --- if set, volume header is dirty, and
+ * if clear, volume header is clean. This value is checked to determine
+ * if the in-memory copy of volume header should be flushed to the disk
+ * or not.
+ */
+/* Set runtime flag to indicate that volume is dirty */
+static __inline__ void MarkVCBDirty(ExtendedVCB *vcb)
+{
+ vcb->vcbFlags |= 0xFF00;
+}
+
+/* Clear runtime flag to indicate that volume is dirty */
+static __inline__ void MarkVCBClean(ExtendedVCB *vcb)
+{
+ vcb->vcbFlags &= 0x00FF;
+}
+
+/* Check runtime flag to determine if the volume is dirty or not */
+static __inline__ Boolean IsVCBDirty(ExtendedVCB *vcb)
+{
+ return (vcb->vcbFlags & 0xFF00 ? true : false);
+}
-/* HFS mount point flags */
-#define HFS_READ_ONLY 0x001
-#define HFS_UNKNOWN_PERMS 0x002
-#define HFS_WRITEABLE_MEDIA 0x004
-#define HFS_CLEANED_ORPHANS 0x008
-#define HFS_X 0x010
-#define HFS_CASE_SENSITIVE 0x020
-#define HFS_STANDARD 0x040
-#define HFS_METADATA_ZONE 0x080
-#define HFS_FRAGMENTED_FREESPACE 0x100
-#define HFS_NEED_JNL_RESET 0x200
+/*
+ * There are two private directories in HFS+.
+ *
+ * One contains inodes for files that are hardlinked or open/unlinked.
+ * The other contains inodes for directories that are hardlinked.
+ */
+enum privdirtype {FILE_HARDLINKS, DIR_HARDLINKS};
-#ifdef HFS_SPARSE_DEV
-#define HFS_HAS_SPARSE_DEVICE 0x400
-#endif
+/* HFS mount point flags */
+#define HFS_READ_ONLY 0x00001
+#define HFS_UNKNOWN_PERMS 0x00002
+#define HFS_WRITEABLE_MEDIA 0x00004
+#define HFS_CLEANED_ORPHANS 0x00008
+#define HFS_X 0x00010
+#define HFS_CASE_SENSITIVE 0x00020
+#define HFS_STANDARD 0x00040
+#define HFS_METADATA_ZONE 0x00080
+#define HFS_FRAGMENTED_FREESPACE 0x00100
+#define HFS_NEED_JNL_RESET 0x00200
+#define HFS_HAS_SPARSE_DEVICE 0x00400
+#define HFS_RESIZE_IN_PROGRESS 0x00800
+#define HFS_QUOTAS 0x01000
+#define HFS_CREATING_BTREE 0x02000
+/* When set, do not update nextAllocation in the mount structure */
+#define HFS_SKIP_UPDATE_NEXT_ALLOCATION 0x04000
+#define HFS_XATTR_EXTENTS 0x08000
+#define HFS_FOLDERCOUNT 0x10000
+/* When set, the file system exists on a virtual device, like disk image */
+#define HFS_VIRTUAL_DEVICE 0x20000
+/* When set, we're in hfs_changefs, so hfs_sync should do nothing. */
+#define HFS_IN_CHANGEFS 0x40000
+/* When set, we are in process of downgrading or have downgraded to read-only,
+ * so hfs_start_transaction should return EROFS.
+ */
+#define HFS_RDONLY_DOWNGRADE 0x80000
+#define HFS_DID_CONTIG_SCAN 0x100000
-#define hfs_global_shared_lock_acquire(hfsmp) \
- do { \
- if (hfsmp->blocker) { \
- tsleep((caddr_t)&hfsmp->blocker, PRIBIO, "journal_blocker", 0); \
- continue; \
- } \
- hfsmp->readers++; \
- break; \
- } while (1)
-
-#define hfs_global_shared_lock_release(hfsmp) \
- do { \
- hfsmp->readers--; \
- if (hfsmp->readers == 0) { \
- wakeup((caddr_t)&hfsmp->readers); \
- } \
- } while (0)
-
-#define hfs_global_exclusive_lock_acquire(hfsmp) \
- do { \
- if (hfsmp->blocker) { \
- tsleep((caddr_t)&hfsmp->blocker, PRIBIO, "journal_blocker", 0); \
- continue; \
- } \
- if (hfsmp->readers != 0) { \
- tsleep((caddr_t)&hfsmp->readers, PRIBIO, "journal_enable/disble", 0); \
- continue; \
- } \
- hfsmp->blocker = 1; \
- break; \
- } while (1)
-
-#define hfs_global_exclusive_lock_release(hfsmp) \
- hfsmp->blocker = 0; \
- wakeup((caddr_t)&hfsmp->blocker)
-
-#define MAXHFSVNODELEN 31
+/* Macro to update next allocation block in the HFS mount structure. If
+ * the HFS_SKIP_UPDATE_NEXT_ALLOCATION is set, do not update
+ * nextAllocation block.
+ */
+#define HFS_UPDATE_NEXT_ALLOCATION(hfsmp, new_nextAllocation) \
+ { \
+ if ((hfsmp->hfs_flags & HFS_SKIP_UPDATE_NEXT_ALLOCATION) == 0)\
+ hfsmp->nextAllocation = new_nextAllocation; \
+ } \
+
+#define HFS_MOUNT_LOCK(hfsmp, metadata) \
+ { \
+ if ((metadata) && 1) \
+ lck_mtx_lock(&(hfsmp)->hfs_mutex); \
+ } \
+
+#define HFS_MOUNT_UNLOCK(hfsmp, metadata) \
+ { \
+ if ((metadata) && 1) \
+ lck_mtx_unlock(&(hfsmp)->hfs_mutex); \
+ } \
+
+#define hfs_global_exclusive_lock_acquire(hfsmp) lck_rw_lock_exclusive(&(hfsmp)->hfs_global_lock)
+#define hfs_global_exclusive_lock_release(hfsmp) lck_rw_unlock_exclusive(&(hfsmp)->hfs_global_lock)
+
+/* Macro for incrementing and decrementing the folder count in a cnode
+ * attribute only if the HFS_FOLDERCOUNT bit is set in the mount flags
+ * and kHFSHasFolderCount bit is set in the cnode flags. Currently these
+ * bits are only set for case sensitive HFS+ volumes.
+ */
+#define INC_FOLDERCOUNT(hfsmp, cattr) \
+ if ((hfsmp->hfs_flags & HFS_FOLDERCOUNT) && \
+ (cattr.ca_recflags & kHFSHasFolderCountMask)) { \
+ cattr.ca_dircount++; \
+ } \
+
+#define DEC_FOLDERCOUNT(hfsmp, cattr) \
+ if ((hfsmp->hfs_flags & HFS_FOLDERCOUNT) && \
+ (cattr.ca_recflags & kHFSHasFolderCountMask) && \
+ (cattr.ca_dircount > 0)) { \
+ cattr.ca_dircount--; \
+ } \
typedef struct filefork FCB;
+/*
+ * Macros for creating item names for our special/private directories.
+ */
+#define MAKE_INODE_NAME(name, size, linkno) \
+ (void) snprintf((name), size, "%s%d", HFS_INODE_PREFIX, (linkno))
+#define HFS_INODE_PREFIX_LEN 5
-#define MAKE_INODE_NAME(name,linkno) \
- (void) sprintf((name), "%s%d", HFS_INODE_PREFIX, (linkno))
+#define MAKE_DIRINODE_NAME(name, size, linkno) \
+ (void) snprintf((name), size, "%s%d", HFS_DIRINODE_PREFIX, (linkno))
+#define HFS_DIRINODE_PREFIX_LEN 4
+#define MAKE_DELETED_NAME(NAME, size, FID) \
+ (void) snprintf((NAME), size, "%s%d", HFS_DELETE_PREFIX, (FID))
+#define HFS_DELETE_PREFIX_LEN 4
-/* structure to hold a "." or ".." directory entry (12 bytes) */
-typedef struct hfsdotentry {
- u_int32_t d_fileno; /* unique file number */
- u_int16_t d_reclen; /* length of this structure */
- u_int8_t d_type; /* dirent file type */
- u_int8_t d_namelen; /* len of filename */
- char d_name[4]; /* "." or ".." */
-} hfsdotentry;
#define HFS_AVERAGE_NAME_SIZE 22
#define AVERAGE_HFSDIRENTRY_SIZE (8+HFS_AVERAGE_NAME_SIZE+4)
-#define MAX_HFSDIRENTRY_SIZE sizeof(struct dirent)
-#define DIRENTRY_SIZE(namlen) \
- ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))
+#define STD_DIRENT_LEN(namlen) \
+ ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))
+#define EXT_DIRENT_LEN(namlen) \
+ ((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 3) & ~3)
enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };
-enum { kdirentMaxNameBytes = NAME_MAX };
-
/* macro to determine if hfs or hfsplus */
#define ISHFSPLUS(VCB) ((VCB)->vcbSigWord == kHFSPlusSigWord)
/*
* Various ways to acquire a VFS mount point pointer:
*/
-#define VTOVFS(VP) ((VP)->v_mount)
+#define VTOVFS(VP) vnode_mount((VP))
#define HFSTOVFS(HFSMP) ((HFSMP)->hfs_mp)
-#define VCBTOVFS(VCB) (((struct vfsVCB *)(VCB))->vcb_hfsmp->hfs_mp)
+#define VCBTOVFS(VCB) HFSTOVFS(VCB)
/*
* Various ways to acquire an HFS mount point pointer:
*/
-#define VTOHFS(VP) ((struct hfsmount *)((VP)->v_mount->mnt_data))
-#define VFSTOHFS(MP) ((struct hfsmount *)(MP)->mnt_data)
-#define VCBTOHFS(VCB) (((struct vfsVCB *)(VCB))->vcb_hfsmp)
-#define FCBTOHFS(FCB) ((struct hfsmount *)(FCB)->ff_cp->c_vp->v_mount->mnt_data)
+#define VTOHFS(VP) ((struct hfsmount *)vfs_fsprivate(vnode_mount((VP))))
+#define VFSTOHFS(MP) ((struct hfsmount *)vfs_fsprivate((MP)))
+#define VCBTOHFS(VCB) (VCB)
+#define FCBTOHFS(FCB) ((struct hfsmount *)vfs_fsprivate(vnode_mount((FCB)->ff_cp->c_vp)))
/*
- * Various ways to acquire a VCB pointer:
+ * Various ways to acquire a VCB (legacy) pointer:
*/
-#define VTOVCB(VP) (&(((struct hfsmount *)((VP)->v_mount->mnt_data))->hfs_vcb.vcb_vcb))
-#define VFSTOVCB(MP) (&(((struct hfsmount *)(MP)->mnt_data)->hfs_vcb.vcb_vcb))
-#define HFSTOVCB(HFSMP) (&(HFSMP)->hfs_vcb.vcb_vcb)
-#define FCBTOVCB(FCB) (&(((struct hfsmount *)((FCB)->ff_cp->c_vp->v_mount->mnt_data))->hfs_vcb.vcb_vcb))
-
-
-#define HFS_KNOTE(vp, hint) KNOTE(&VTOC(vp)->c_knotes, (hint))
+#define VTOVCB(VP) VTOHFS(VP)
+#define VFSTOVCB(MP) VFSTOHFS(MP)
+#define HFSTOVCB(HFSMP) (HFSMP)
+#define FCBTOVCB(FCB) FCBTOHFS(FCB)
#define E_NONE 0
#define HFS_ALT_SECTOR(blksize, blkcnt) (((blkcnt) - 1) - (512 / (blksize)))
#define HFS_ALT_OFFSET(blksize) ((blksize) > 1024 ? (blksize) - 1024 : 0)
+/* Convert the logical sector number to be aligned on physical block size boundary.
+ * We are assuming the partition is a multiple of physical block size.
+ */
+#define HFS_PHYSBLK_ROUNDDOWN(sector_num, log_per_phys) ((sector_num / log_per_phys) * log_per_phys)
+
+/*
+ * HFS specific fcntl()'s
+ */
+#define HFS_BULKACCESS (FCNTL_FS_SPECIFIC_BASE + 0x00001)
+#define HFS_GET_MOUNT_TIME (FCNTL_FS_SPECIFIC_BASE + 0x00002)
+#define HFS_GET_LAST_MTIME (FCNTL_FS_SPECIFIC_BASE + 0x00003)
+#define HFS_GET_BOOT_INFO (FCNTL_FS_SPECIFIC_BASE + 0x00004)
+#define HFS_SET_BOOT_INFO (FCNTL_FS_SPECIFIC_BASE + 0x00005)
+#define HFS_EXT_BULKACCESS (FCNTL_FS_SPECIFIC_BASE + 0x00006)
+
+
/*
* This is the straight GMT conversion constant:
* 00:00:00 January 1, 1970 - 00:00:00 January 1, 1904
#define MAC_GMT_FACTOR 2082844800UL
-u_int32_t to_bsd_time(u_int32_t hfs_time);
-u_int32_t to_hfs_time(u_int32_t bsd_time);
+/*****************************************************************************
+ FUNCTION PROTOTYPES
+******************************************************************************/
-int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush);
-#define HFS_ALTFLUSH 1
-extern int hfsUnmount(struct hfsmount *hfsmp, struct proc *p);
+/*****************************************************************************
+ hfs_vnop_xxx functions from different files
+******************************************************************************/
+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 */
-extern int hfs_getcnode(struct hfsmount *hfsmp, cnid_t cnid, struct cat_desc *descp,
- int wantrsrc, struct cat_attr *attrp, struct cat_fork *forkp,
- struct vnode **vpp);
+int hfs_vnop_link(struct vnop_link_args *); /* in hfs_link.c */
-extern int hfs_getnewvnode(struct hfsmount *hfsmp, struct cnode *cp,
- struct cat_desc *descp, int wantrsrc, struct cat_attr *attrp,
- struct cat_fork *forkp, struct vnode **vpp);
+int hfs_vnop_lookup(struct vnop_lookup_args *); /* in hfs_lookup.c */
-extern int hfs_metafilelocking(struct hfsmount *hfsmp, u_long fileID, u_int flags, struct proc *p);
+int hfs_vnop_search(struct vnop_searchfs_args *); /* in hfs_search.c */
-extern u_int32_t hfs_freeblks(struct hfsmount * hfsmp, int wantreserve);
+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 */
-extern void hfs_remove_orphans(struct hfsmount *);
+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 */
+#if NAMEDSTREAMS
+extern int hfs_vnop_getnamedstream(struct vnop_getnamedstream_args*);
+extern int hfs_vnop_makenamedstream(struct vnop_makenamedstream_args*);
+extern int hfs_vnop_removenamedstream(struct vnop_removenamedstream_args*);
+#endif
-short MacToVFSError(OSErr err);
+/*****************************************************************************
+ Functions from MacOSStubs.c
+******************************************************************************/
+time_t to_bsd_time(u_int32_t hfs_time);
-extern int hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, struct ucred *cred,
- struct proc *p, int invokesuperuserstatus);
+u_int32_t to_hfs_time(time_t bsd_time);
-u_long FindMetaDataDirectory(ExtendedVCB *vcb);
-#define kMaxSecsForFsync 5
-#define HFS_SYNCTRANS 1
+/*****************************************************************************
+ Functions from hfs_encodinghint.c
+******************************************************************************/
+u_int32_t hfs_pickencoding(const u_int16_t *src, int len);
-extern int hfs_btsync(struct vnode *vp, int sync_transaction);
-// used as a callback by the journaling code
-extern void hfs_sync_metadata(void *arg);
+u_int32_t hfs_getencodingbias(void);
-short make_dir_entry(FCB **fileptr, char *name, u_int32_t fileID);
+void hfs_setencodingbias(u_int32_t bias);
-unsigned long BestBlockSizeFit(unsigned long allocationBlockSize,
- unsigned long blockSizeLimit,
- unsigned long baseMultiple);
-
-OSErr hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
- struct proc *p);
-OSErr hfs_MountHFSPlusVolume(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
- off_t embeddedOffset, u_int64_t disksize, struct proc *p, void *args);
-
-extern int hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
- void *_args, int embeddedOffset, int mdb_offset,
- HFSMasterDirectoryBlock *mdbp, struct ucred *cred);
-extern u_long GetFileInfo(ExtendedVCB *vcb, u_int32_t dirid, char *name,
- struct cat_attr *fattr, struct cat_fork *forkinfo);
+/*****************************************************************************
+ Functions from hfs_encodings.c
+******************************************************************************/
+void hfs_converterinit(void);
int hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode,
unicode_to_hfs_func_t *get_hfsname);
int hfs_relconverter(u_int32_t encoding);
-int hfs_to_utf8(ExtendedVCB *vcb, Str31 hfs_str, ByteCount maxDstLen,
+int hfs_to_utf8(ExtendedVCB *vcb, const Str31 hfs_str, ByteCount maxDstLen,
ByteCount *actualDstLen, unsigned char* dstStr);
int utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr,
Str31 dstStr);
-int mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,
+int mac_roman_to_utf8(const Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,
unsigned char* dstStr);
int utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr);
-u_int32_t hfs_pickencoding(const u_int16_t *src, int len);
+int mac_roman_to_unicode(const Str31 hfs_str, UniChar *uni_str, u_int32_t maxCharLen, u_int32_t *usedCharLen);
-enum volop {VOL_UPDATE, VOL_MKDIR, VOL_RMDIR, VOL_MKFILE, VOL_RMFILE};
+int unicode_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, u_int16_t* srcStr, Str31 dstStr, int retry);
+
+
+/*****************************************************************************
+ Functions from hfs_notifications.c
+******************************************************************************/
+void hfs_generate_volume_notifications(struct hfsmount *hfsmp);
+
+
+/*****************************************************************************
+ Functions from hfs_readwrite.c
+******************************************************************************/
+extern int hfs_relocate(struct vnode *, u_int32_t, kauth_cred_t, struct proc *);
+
+extern int hfs_truncate(struct vnode *, off_t, int, int, int, vfs_context_t);
+
+extern int hfs_bmap(struct vnode *, daddr_t, struct vnode **, daddr64_t *, unsigned int *);
+
+extern int hfs_fsync(struct vnode *, int, int, struct proc *);
+
+extern int hfs_access(struct vnode *, mode_t, kauth_cred_t, struct proc *);
+
+extern int hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid);
+
+extern int hfs_set_volxattr(struct hfsmount *hfsmp, unsigned int xattrtype, int state);
+
+extern void hfs_check_volxattr(struct hfsmount *hfsmp, unsigned int xattrtype);
+
+extern int hfs_isallocated(struct hfsmount *, u_int32_t, u_int32_t);
-extern int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot);
+
+/*****************************************************************************
+ Functions from hfs_vfsops.c
+******************************************************************************/
+int hfs_mountroot(mount_t mp, vnode_t rvp, vfs_context_t context);
+
+/* used as a callback by the journaling code */
+extern void hfs_sync_metadata(void *arg);
+
+extern int hfs_vget(struct hfsmount *, cnid_t, struct vnode **, int);
extern void hfs_setencodingbits(struct hfsmount *hfsmp, u_int32_t encoding);
+enum volop {VOL_UPDATE, VOL_MKDIR, VOL_RMDIR, VOL_MKFILE, VOL_RMFILE};
+extern int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot);
+
+int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush);
+#define HFS_ALTFLUSH 1
-extern void replace_desc(struct cnode *cp, struct cat_desc *cdp);
+extern int hfs_extendfs(struct hfsmount *, u_int64_t, vfs_context_t);
+extern int hfs_truncatefs(struct hfsmount *, u_int64_t, vfs_context_t);
+extern int hfs_resize_progress(struct hfsmount *, u_int32_t *);
+
+/* If a runtime corruption is detected, mark the volume inconsistent
+ * bit in the volume attributes.
+ */
+void hfs_mark_volume_inconsistent(struct hfsmount *hfsmp);
+
+/*****************************************************************************
+ Functions from hfs_vfsutils.c
+******************************************************************************/
+u_int32_t BestBlockSizeFit(u_int32_t allocationBlockSize,
+ u_int32_t blockSizeLimit,
+ u_int32_t baseMultiple);
+
+OSErr hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
+ struct proc *p);
+OSErr hfs_MountHFSPlusVolume(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
+ off_t embeddedOffset, u_int64_t disksize, struct proc *p, void *args, kauth_cred_t cred);
+
+extern int hfsUnmount(struct hfsmount *hfsmp, struct proc *p);
-extern int hfs_namecmp(const char *, size_t, const char *, size_t);
+extern int overflow_extents(struct filefork *fp);
+
+extern int hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, kauth_cred_t cred,
+ struct proc *p, int invokesuperuserstatus);
+
+
+/* HFS System file locking */
+#define SFL_CATALOG 0x0001
+#define SFL_EXTENTS 0x0002
+#define SFL_BITMAP 0x0004
+#define SFL_ATTRIBUTE 0x0008
+#define SFL_STARTUP 0x0010
+#define SFL_VALIDMASK (SFL_CATALOG | SFL_EXTENTS | SFL_BITMAP | SFL_ATTRIBUTE | SFL_STARTUP)
+
+extern int hfs_systemfile_lock(struct hfsmount *, int, enum hfslocktype);
+extern void hfs_systemfile_unlock(struct hfsmount *, int);
+
+extern u_int32_t GetFileInfo(ExtendedVCB *vcb, u_int32_t dirid, const char *name,
+ struct cat_attr *fattr, struct cat_fork *forkinfo);
+
+extern void hfs_remove_orphans(struct hfsmount *);
+
+u_int32_t GetLogicalBlockSize(struct vnode *vp);
+
+extern u_int32_t hfs_freeblks(struct hfsmount * hfsmp, int wantreserve);
+
+short MacToVFSError(OSErr err);
+
+/* HFS directory hint functions. */
+extern directoryhint_t * hfs_getdirhint(struct cnode *, int, int);
+extern void hfs_reldirhint(struct cnode *, directoryhint_t *);
+extern void hfs_reldirhints(struct cnode *, int);
+extern void hfs_insertdirhint(struct cnode *, directoryhint_t *);
+
+extern int hfs_namecmp(const u_int8_t *str1, size_t len1, const u_int8_t *str2, size_t len2);
+
+extern int hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
+ void *_args, off_t embeddedOffset, daddr64_t mdb_offset,
+ HFSMasterDirectoryBlock *mdbp, kauth_cred_t cred);
extern int hfs_virtualmetafile(struct cnode *);
-void hfs_generate_volume_notifications(struct hfsmount *hfsmp);
+extern int hfs_start_transaction(struct hfsmount *hfsmp);
+extern int hfs_end_transaction(struct hfsmount *hfsmp);
+extern int hfs_journal_flush(struct hfsmount *hfsmp);
+extern void hfs_sync_ejectable(struct hfsmount *hfsmp);
+
+/* Erase unused Catalog nodes due to <rdar://problem/6947811>. */
+extern int hfs_erase_unused_nodes(struct hfsmount *hfsmp);
+
+
+/*****************************************************************************
+ Functions from hfs_vnops.c
+******************************************************************************/
+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);
+
+#define kMaxSecsForFsync 5
+#define HFS_SYNCTRANS 1
+extern int hfs_btsync(struct vnode *vp, int sync_transaction);
+
+extern void replace_desc(struct cnode *cp, struct cat_desc *cdp);
+
+extern int hfs_vgetrsrc(struct hfsmount *hfsmp, struct vnode *vp,
+ struct vnode **rvpp, int can_drop_lock, int error_on_unlinked);
+
+extern int hfs_update(struct vnode *, int);
+
+
+/*****************************************************************************
+ Functions from hfs_xattr.c
+******************************************************************************/
+int hfs_attrkeycompare(HFSPlusAttrKey *searchKey, HFSPlusAttrKey *trialKey);
+int hfs_buildattrkey(u_int32_t fileID, const char *attrname, HFSPlusAttrKey *key);
+void hfs_xattr_init(struct hfsmount * hfsmp);
+int file_attribute_exist(struct hfsmount *hfsmp, uint32_t fileID);
+
+
+
+/*****************************************************************************
+ Functions from hfs_link.c
+******************************************************************************/
+
+extern int hfs_unlink(struct hfsmount *hfsmp, struct vnode *dvp, struct vnode *vp,
+ struct componentname *cnp, int skip_reserve);
+extern int hfs_lookuplink(struct hfsmount *hfsmp, cnid_t linkfileid,
+ cnid_t *prevlinkid, cnid_t *nextlinkid);
+extern void hfs_privatedir_init(struct hfsmount *, enum privdirtype);
+
+extern void hfs_savelinkorigin(cnode_t *cp, cnid_t parentcnid);
+extern void hfs_relorigins(struct cnode *cp);
+extern void hfs_relorigin(struct cnode *cp, cnid_t parentcnid);
+extern int hfs_haslinkorigin(cnode_t *cp);
+extern cnid_t hfs_currentparent(cnode_t *cp);
+extern cnid_t hfs_currentcnid(cnode_t *cp);
#endif /* __APPLE_API_PRIVATE */
projects / apple / xnu.git / blobdiff