/*
- * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2015 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__
+/* If set to 1, enables the code to allocate blocks from the start
+ * of the disk instead of the nextAllocation for sparse devices like
+ * sparse disk images or sparsebundle images. The free extent cache
+ * for such volumes is also maintained based on the start block instead
+ * of number of contiguous allocation blocks. These devices prefer
+ * allocation of blocks near the start of the disk to avoid the
+ * increasing the image size, but it can also result in file fragmentation.
+ */
#define HFS_SPARSE_DEV 1
+#if DEBUG
+#define HFS_CHECK_LOCK_ORDER 1
+#endif
+
+#define HFS_TMPDBG 0
+
#include <sys/appleapiopts.h>
#ifdef KERNEL
#include <sys/quota.h>
#include <sys/dirent.h>
#include <sys/event.h>
+#include <sys/disk.h>
+#include <kern/thread_call.h>
#include <kern/locks.h>
#include <hfs/hfs_macos_defs.h>
#include <hfs/hfs_encodings.h>
#include <hfs/hfs_hotfiles.h>
+#include <hfs/hfs_fsctl.h>
+
+#if CONFIG_PROTECT
+/* Forward declare the cprotect struct */
+struct cprotect;
+
+
+#endif
/*
* 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 */
/* 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;
/* How many free extents to cache per volume */
#define kMaxFreeExtents 10
+/* The maximum time hfs locks can be held while performing hfs statistics gathering */
+#define HFS_FSINFO_MAX_LOCKHELD_TIME 20 * 1000000ULL /* at most 20 milliseconds. */
+
/*
* HFS_MINFREE gives the minimum acceptable percentage
* of file system blocks which may be free (but this
*/
#define HFS_MINFREE 1
#define HFS_MAXRESERVE ((u_int64_t)(250*1024*1024))
+#define HFS_BT_MAXRESERVE ((u_int64_t)(10*1024*1024))
/*
* The system distinguishes between the desirable low-disk
* volume size, all capped at a certain fixed level
*/
-#define HFS_ROOTLOWDISKTRIGGERFRACTION 5
-#define HFS_ROOTLOWDISKTRIGGERLEVEL ((u_int64_t)(250*1024*1024))
-#define HFS_ROOTLOWDISKSHUTOFFFRACTION 6
-#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_ROOTVERYLOWDISKTRIGGERFRACTION 5
+#define HFS_ROOTVERYLOWDISKTRIGGERLEVEL ((u_int64_t)(512*1024*1024))
+#define HFS_ROOTLOWDISKTRIGGERFRACTION 10
+#define HFS_ROOTLOWDISKTRIGGERLEVEL ((u_int64_t)(1024*1024*1024))
+#define HFS_ROOTLOWDISKSHUTOFFFRACTION 11
+#define HFS_ROOTLOWDISKSHUTOFFLEVEL ((u_int64_t)(1024*1024*1024 + 250*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*/
-
-#define kHFS_DamagedVolume 0x1 /* This volume has errors, unmount dirty */
-
-/* XXX */
-#define MARK_VOLUMEDAMAGED(fcb)
-
-
/* This structure describes the HFS specific mount structure data. */
typedef struct hfsmount {
u_int32_t hfs_flags; /* see below */
/* Physical Description */
- u_long hfs_phys_block_size; /* Always a multiple of 512 */
- daddr64_t hfs_phys_block_count; /* Num of PHYSICAL blocks of volume */
- daddr64_t hfs_alt_id_sector; /* location of alternate VH/MDB */
+ 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, as reported by ioctl(DKIOCGETBLOCKCOUNT) */
+ u_int64_t hfs_logical_bytes; /* Number of bytes on the disk device this HFS is mounted on (blockcount * blocksize) */
+ /*
+ * Regarding the two AVH sector fields below:
+ * Under normal circumstances, the filesystem's notion of the "right" location for the AVH is such that
+ * the partition and filesystem's are in sync. However, during a filesystem resize, HFS proactively
+ * writes a new AVH at the end of the filesystem, assuming that the partition will be resized accordingly.
+ *
+ * However, it is not technically a corruption if the partition size is never modified. As a result, we need
+ * to keep two copies of the AVH around "just in case" the partition size is not modified.
+ */
+ daddr64_t hfs_partition_avh_sector; /* location of Alt VH w.r.t partition size */
+ daddr64_t hfs_fs_avh_sector; /* location of Alt VH w.r.t filesystem size */
+
+ 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_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 */
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 */
+ 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 freeBlocks; /* free allocation blocks */
+ u_int32_t reclaimBlocks; /* number of blocks we are reclaiming during resize */
+ u_int32_t tentativeBlocks; /* tentative allocation blocks -- see note below */
u_int32_t nextAllocation; /* start of next allocation search */
- u_int32_t vcbNxtCNID; /* next unused catalog node ID */
+ 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 */
/* Persistent fields (on disk, static) */
u_int16_t vcbSigWord;
- int16_t vcbFlags;
+
+ // Volume will be inconsistent if header is not flushed
+ bool hfs_header_dirty;
+
+ // Volume header is dirty, but won't be inconsistent if not flushed
+ bool hfs_header_minor_change;
+
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 localCreateDate;/* volume create time from volume header (For HFS+, value is in local time) */
+ time_t hfs_itime; /* file system creation time (creation date of the root folder) */
+ 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 */
/* cache of largest known free extents */
u_int32_t vcbFreeExtCnt;
HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
+ lck_spin_t vcbFreeExtLock;
+
+ /* Summary Table */
+ u_int8_t *hfs_summary_table; /* Each bit is 1 vcbVBMIOSize of bitmap, byte indexed */
+ u_int32_t hfs_summary_size; /* number of BITS in summary table defined above (not bytes!) */
+ u_int32_t hfs_summary_bytes; /* number of BYTES in summary table */
+ u_int32_t scan_var; /* For initializing the summary table */
+
+
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 */
- struct cat_desc hfs_privdir_desc;
- struct cat_attr hfs_privdir_attr;
+ u_int32_t lockedBlocks; /* blocks reserved and locked */
+
+ /*
+ * 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;
struct quotafile hfs_qfiles[MAXQUOTAS]; /* quota files */
/* Journaling variables: */
- void *jnl; // the journal for this volume (if one exists)
+ struct journal *jnl; // the journal for this volume (if one exists)
struct vnode *jvp; // device where the journal lives (may be equal to devvp)
u_int32_t jnl_start; // start block of the journal file (so we don't delete it)
u_int32_t jnl_size;
u_int32_t hfs_jnlfileid;
u_int32_t hfs_jnlinfoblkid;
- lck_rw_t hfs_global_lock;
- u_int32_t hfs_global_lock_nesting;
-
+ lck_rw_t hfs_global_lock;
+ thread_t hfs_global_lockowner;
+ u_int32_t hfs_transaction_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;
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;
+ u_int64_t hfs_cs_hotfile_size; // in bytes
int hfs_hotfile_freeblks;
+ int hfs_hotfile_blk_adjust;
int hfs_hotfile_maxblks;
int hfs_overflow_maxblks;
int hfs_catalog_maxblks;
time_t hfc_timebase; /* recording period start time */
time_t hfc_timeout; /* recording period stop time */
void * hfc_recdata; /* recording data (opaque) */
- int hfc_maxfiles; /* maximum files to track */
+ uint32_t hfc_maxfiles; /* maximum files to track */
struct vnode * hfc_filevp;
-#ifdef HFS_SPARSE_DEV
+#if HFS_SPARSE_DEV
/* Sparse device variables: */
struct vnode * hfs_backingfs_rootvp;
- int hfs_sparsebandblks;
+ u_int32_t hfs_last_backingstatfs;
+ u_int32_t 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 */
- lck_rw_t hfs_insync; /* protects sync/freeze interaction */
+
+ uint32_t hfs_syncers; // Count of the number of syncers running
+ enum {
+ HFS_THAWED,
+ HFS_WANT_TO_FREEZE, // This state stops hfs_sync from starting
+ HFS_FREEZING, // We're in this state whilst we're flushing
+ HFS_FROZEN // Everything gets blocked in hfs_lock_global
+ } hfs_freeze_state;
+ union {
+ /*
+ * When we're freezing (HFS_FREEZING) but not yet
+ * frozen (HFS_FROZEN), we record the freezing thread
+ * so that we stop other threads from taking locks,
+ * but allow the freezing thread.
+ */
+ const struct thread *hfs_freezing_thread;
+ /*
+ * Once we have frozen (HFS_FROZEN), we record the
+ * process so that if it dies, we can automatically
+ * unfreeze.
+ */
+ proc_t hfs_freezing_proc;
+ };
+
+ thread_t hfs_downgrading_thread; /* thread who's downgrading to rdonly */
+
+ /* Resize variables: */
+ u_int32_t hfs_resize_blocksmoved;
+ u_int32_t hfs_resize_totalblocks;
+ u_int32_t hfs_resize_progress;
+#if CONFIG_PROTECT
+ /* Data Protection fields */
+ cpx_t hfs_resize_cpx;
+ u_int16_t hfs_running_cp_major_vers;
+ uint32_t default_cp_class; /* default effective class value */
+ uint64_t cproot_flags;
+ uint8_t cp_crypto_generation;
+ uint8_t hfs_cp_lock_state; /* per-mount device lock state info */
+#if HFS_TMPDBG
+#if !SECURE_KERNEL
+ boolean_t hfs_cp_verbose;
+#endif
+#endif
+
+#endif
+
+ /* 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 */
+
+ /* Per mount fileid hash variables (protected by catalog lock!) */
+ u_long hfs_idhash; /* size of cnid/fileid hash table -1 */
+ LIST_HEAD(idhashhead, cat_preflightid) *hfs_idhashtbl; /* base of ID hash */
+
+ // Records the oldest outstanding sync request
+ struct timeval hfs_sync_req_oldest;
+
+ // Records whether a sync has been queued or is in progress
+ boolean_t hfs_sync_incomplete;
+
+ thread_call_t hfs_syncer; // removeable devices get sync'ed by this guy
+
+ /* Records the syncer thread so that we can avoid the syncer
+ queing more syncs. */
+ thread_t hfs_syncer_thread;
+
+ // Not currently used except for debugging purposes
+ uint32_t hfs_active_threads;
+
+ enum {
+ // These are indices into the array below
+
+ // Tentative ranges can be claimed back at any time
+ HFS_TENTATIVE_BLOCKS = 0,
+
+ // Locked ranges cannot be claimed back, but the allocation
+ // won't have been written to disk yet
+ HFS_LOCKED_BLOCKS = 1,
+ };
+ // These lists are not sorted like a range list usually is
+ struct rl_head hfs_reserved_ranges[2];
} hfsmount_t;
+/*
+ * HFS_META_DELAY is a duration (in usecs) used for triggering the
+ * hfs_syncer() routine. We will back off if writes are in
+ * progress, but...
+ * HFS_MAX_META_DELAY is the maximum time we will allow the
+ * syncer to be delayed.
+ */
+enum {
+ HFS_META_DELAY = 100 * 1000, // 0.1 secs
+ HFS_MAX_META_DELAY = 5000 * 1000 // 5 secs
+};
+
typedef hfsmount_t ExtendedVCB;
-/* Aliases for legacy field names */
-#define vcbCrDate hfs_itime
+/* Aliases for legacy (Mac OS 9) field names */
#define vcbLsMod hfs_mtime
#define vcbVolBkUp hfs_btime
#define extentsRefNum hfs_extents_vp
#define vcbFilCnt hfs_filecount
#define vcbDirCnt hfs_dircount
+static inline void MarkVCBDirty(hfsmount_t *hfsmp)
+{
+ hfsmp->hfs_header_dirty = true;
+}
+
+static inline void MarkVCBClean(hfsmount_t *hfsmp)
+{
+ hfsmp->hfs_header_dirty = false;
+ hfsmp->hfs_header_minor_change = false;
+}
+
+static inline bool IsVCBDirty(ExtendedVCB *vcb)
+{
+ return vcb->hfs_header_minor_change || vcb->hfs_header_dirty;
+}
+
+// Header is changed but won't be inconsistent if we don't write it
+static inline void hfs_note_header_minor_change(hfsmount_t *hfsmp)
+{
+ hfsmp->hfs_header_minor_change = true;
+}
+
+// Must header be flushed for volume to be consistent?
+static inline bool hfs_header_needs_flushing(hfsmount_t *hfsmp)
+{
+ return (hfsmp->hfs_header_dirty
+ || ISSET(hfsmp->hfs_catalog_cp->c_flag, C_MODIFIED)
+ || ISSET(hfsmp->hfs_extents_cp->c_flag, C_MODIFIED)
+ || (hfsmp->hfs_attribute_cp
+ && ISSET(hfsmp->hfs_attribute_cp->c_flag, C_MODIFIED))
+ || (hfsmp->hfs_allocation_cp
+ && ISSET(hfsmp->hfs_allocation_cp->c_flag, C_MODIFIED))
+ || (hfsmp->hfs_startup_cp
+ && ISSET(hfsmp->hfs_startup_cp->c_flag, C_MODIFIED)));
+}
-/* 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
-#define HFS_HAS_SPARSE_DEVICE 0x400
-
-
-#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_done(&(hfsmp)->hfs_global_lock)
-
+/*
+ * 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};
-#define MAXHFSVNODELEN 31
+#define HFS_ALLOCATOR_SCAN_INFLIGHT 0x0001 /* scan started */
+#define HFS_ALLOCATOR_SCAN_COMPLETED 0x0002 /* initial scan was completed */
+/* 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
+/* When set, the file system supports extent-based extended attributes */
+#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_UNMAP 0x200000
+#define HFS_SSD 0x400000
+#define HFS_SUMMARY_TABLE 0x800000
+#define HFS_CS 0x1000000
+#define HFS_CS_METADATA_PIN 0x2000000
+#define HFS_CS_HOTFILE_PIN 0x4000000 /* cooperative fusion (enables a hotfile variant) */
+#define HFS_FEATURE_BARRIER 0x8000000 /* device supports barrier-only flush */
+#define HFS_CS_SWAPFILE_PIN 0x10000000
+
+/* 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; \
+ } \
+
+/* 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 HFS_INODE_PREFIX_LEN 5
+#define MAKE_DELETED_NAME(NAME, size, FID) \
+ (void) snprintf((NAME), size, "%s%d", HFS_DELETE_PREFIX, (FID))
+#define HFS_DELETE_PREFIX_LEN 4
#define HFS_AVERAGE_NAME_SIZE 22
((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))
#define EXT_DIRENT_LEN(namlen) \
- ((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 3) & ~3)
+ ((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 7) & ~7)
enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };
#define FCBTOVCB(FCB) FCBTOHFS(FCB)
-#define HFS_KNOTE(vp, hint) KNOTE(&VTOC(vp)->c_knotes, (hint))
-
-
#define E_NONE 0
#define kHFSBlockSize 512
#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)
+/* See HFSIOC_EXT_BULKACCESS and friends for HFS specific fsctls*/
+
/*
*/
#define MAC_GMT_FACTOR 2082844800UL
+static inline __attribute__((const))
+off_t hfs_blk_to_bytes(uint32_t blk, uint32_t blk_size)
+{
+ return (off_t)blk * blk_size; // Avoid the overflow
+}
+
+/*
+ * For now, we use EIO to indicate consistency issues. It is safe to
+ * return or assign an error value to HFS_EINCONSISTENT but it is
+ * *not* safe to compare against it because EIO can be generated for
+ * other reasons. We take advantage of the fact that == has
+ * left-to-right associativity and so any uses of:
+ *
+ * if (error == HFS_EINCONSISTENT)
+ *
+ * will produce a compiler warning: "comparison between pointer and
+ * integer".
+ *
+ * Note that not everwhere is consistent with the use of
+ * HFS_EINCONSISTENT. Some places return EINVAL, EIO directly or
+ * other error codes.
+ */
+#define HFS_EINCONSISTENT (void *)0 == (void *)0 ? EIO : EIO
+
+/*****************************************************************************
+ FUNCTION PROTOTYPES
+******************************************************************************/
+
+/*****************************************************************************
+ hfs_vnop_xxx functions from different files
+******************************************************************************/
+int hfs_vnop_readdirattr(struct vnop_readdirattr_args *); /* in hfs_attrlist.c */
+int hfs_vnop_getattrlistbulk(struct vnop_getattrlistbulk_args *); /* in hfs_attrlist.c */
+
+int hfs_vnop_inactive(struct vnop_inactive_args *); /* in hfs_cnode.c */
+int hfs_vnop_reclaim(struct vnop_reclaim_args *); /* in hfs_cnode.c */
+
+int hfs_set_backingstore (struct vnode *vp, int val); /* in hfs_cnode.c */
+int hfs_is_backingstore (struct vnode *vp, int *val); /* in hfs_cnode.c */
+
+int hfs_vnop_link(struct vnop_link_args *); /* in hfs_link.c */
+
+int hfs_vnop_lookup(struct vnop_lookup_args *); /* in hfs_lookup.c */
+
+int hfs_vnop_search(struct vnop_searchfs_args *); /* in hfs_search.c */
+
+int hfs_vnop_read(struct vnop_read_args *); /* in hfs_readwrite.c */
+int hfs_vnop_write(struct vnop_write_args *); /* in hfs_readwrite.c */
+int hfs_vnop_ioctl(struct vnop_ioctl_args *); /* in hfs_readwrite.c */
+int hfs_vnop_select(struct vnop_select_args *); /* in hfs_readwrite.c */
+int hfs_vnop_strategy(struct vnop_strategy_args *); /* in hfs_readwrite.c */
+int hfs_vnop_allocate(struct vnop_allocate_args *); /* in hfs_readwrite.c */
+int hfs_vnop_pagein(struct vnop_pagein_args *); /* in hfs_readwrite.c */
+int hfs_vnop_pageout(struct vnop_pageout_args *); /* in hfs_readwrite.c */
+int hfs_vnop_bwrite(struct vnop_bwrite_args *); /* in hfs_readwrite.c */
+int hfs_vnop_blktooff(struct vnop_blktooff_args *); /* in hfs_readwrite.c */
+int hfs_vnop_offtoblk(struct vnop_offtoblk_args *); /* in hfs_readwrite.c */
+int hfs_vnop_blockmap(struct vnop_blockmap_args *); /* in hfs_readwrite.c */
+errno_t hfs_flush_invalid_ranges(vnode_t vp); /* in hfs_readwrite.c */
+
+int hfs_vnop_getxattr(struct vnop_getxattr_args *); /* in hfs_xattr.c */
+int hfs_vnop_setxattr(struct vnop_setxattr_args *); /* in hfs_xattr.c */
+int hfs_vnop_removexattr(struct vnop_removexattr_args *); /* in hfs_xattr.c */
+int hfs_vnop_listxattr(struct vnop_listxattr_args *); /* in hfs_xattr.c */
+#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
+
+/*****************************************************************************
+ Functions from MacOSStubs.c
+******************************************************************************/
time_t to_bsd_time(u_int32_t hfs_time);
+
u_int32_t to_hfs_time(time_t bsd_time);
-int hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor, int altflush);
-#define HFS_ALTFLUSH 1
-extern int hfsUnmount(struct hfsmount *hfsmp, struct proc *p);
+/*****************************************************************************
+ Functions from hfs_encodinghint.c
+******************************************************************************/
+u_int32_t hfs_pickencoding(const u_int16_t *src, int len);
-extern int hfs_getnewvnode(struct hfsmount *hfsmp, struct vnode *dvp, struct componentname *cnp,
- struct cat_desc *descp, int wantrsrc, struct cat_attr *attrp,
- struct cat_fork *forkp, struct vnode **vpp);
+u_int32_t hfs_getencodingbias(void);
-extern u_int32_t hfs_freeblks(struct hfsmount * hfsmp, int wantreserve);
+void hfs_setencodingbias(u_int32_t bias);
-extern void hfs_remove_orphans(struct hfsmount *);
+/*****************************************************************************
+ Functions from hfs_encodings.c
+******************************************************************************/
+void hfs_converterinit(void);
-short MacToVFSError(OSErr err);
+int hfs_relconverter (u_int32_t encoding);
-extern int hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, struct ucred *cred,
- struct proc *p, int invokesuperuserstatus);
+int hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode,
+ unicode_to_hfs_func_t *get_hfsname);
-u_long FindMetaDataDirectory(ExtendedVCB *vcb);
+#if CONFIG_HFS_STD
+int hfs_to_utf8(ExtendedVCB *vcb, const Str31 hfs_str, ByteCount maxDstLen,
+ ByteCount *actualDstLen, unsigned char* dstStr);
-#define kMaxSecsForFsync 5
-#define HFS_SYNCTRANS 1
+int utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr,
+ Str31 dstStr);
-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);
+int mac_roman_to_utf8(const Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,
+ unsigned char* dstStr);
-short make_dir_entry(FCB **fileptr, char *name, u_int32_t fileID);
+int utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr);
+int mac_roman_to_unicode(const Str31 hfs_str, UniChar *uni_str, u_int32_t maxCharLen, u_int32_t *usedCharLen);
-unsigned long BestBlockSizeFit(unsigned long allocationBlockSize,
- unsigned long blockSizeLimit,
- unsigned long baseMultiple);
+int unicode_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, u_int16_t* srcStr, Str31 dstStr, int retry);
+#endif
-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);
+/*****************************************************************************
+ Functions from hfs_notifications.c
+******************************************************************************/
+void hfs_generate_volume_notifications(struct hfsmount *hfsmp);
-extern int hfs_early_journal_init(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
- void *_args, off_t embeddedOffset, daddr64_t mdb_offset,
- HFSMasterDirectoryBlock *mdbp, struct ucred *cred);
-extern u_long GetFileInfo(ExtendedVCB *vcb, u_int32_t dirid, const char *name,
- struct cat_attr *fattr, struct cat_fork *forkinfo);
-int hfs_getconverter(u_int32_t encoding, hfs_to_unicode_func_t *get_unicode,
- unicode_to_hfs_func_t *get_hfsname);
+/*****************************************************************************
+ Functions from hfs_readwrite.c
+******************************************************************************/
+extern int hfs_relocate(struct vnode *, u_int32_t, kauth_cred_t, struct proc *);
-int hfs_relconverter(u_int32_t encoding);
+/* flags for hfs_pin_block_range() and hfs_pin_vnode() */
+#define HFS_PIN_IT 0x0001
+#define HFS_UNPIN_IT 0x0002
+#define HFS_TEMP_PIN 0x0004
+#define HFS_EVICT_PIN 0x0008
+#define HFS_DATALESS_PIN 0x0010
-int hfs_to_utf8(ExtendedVCB *vcb, Str31 hfs_str, ByteCount maxDstLen,
- ByteCount *actualDstLen, unsigned char* dstStr);
+//
+// pin/un-pin an explicit range of blocks to the "fast" (usually ssd) device
+//
+int hfs_pin_block_range(struct hfsmount *hfsmp, int pin_state, uint32_t start_block, uint32_t nblocks, vfs_context_t ctx);
-int utf8_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, const unsigned char* srcStr,
- Str31 dstStr);
+//
+// pin/un-pin all the extents belonging to a vnode.
+// also, if it is non-null, "num_blocks_pinned" returns the number of blocks pin/unpinned by the function
+//
+int hfs_pin_vnode(struct hfsmount *hfsmp, struct vnode *vp, int pin_state, uint32_t *num_blocks_pinned, vfs_context_t ctx);
-int mac_roman_to_utf8(Str31 hfs_str, ByteCount maxDstLen, ByteCount *actualDstLen,
- unsigned char* dstStr);
-int utf8_to_mac_roman(ByteCount srcLen, const unsigned char* srcStr, Str31 dstStr);
+int hfs_pin_overflow_extents (struct hfsmount *hfsmp, uint32_t fileid, uint8_t forktype, uint32_t *pinned);
+
-u_int32_t hfs_pickencoding(const u_int16_t *src, int len);
+/* Flags for HFS truncate */
+#define HFS_TRUNCATE_SKIPTIMES 0x00000002 /* implied by skipupdate; it is a subset */
+
-enum volop {VOL_UPDATE, VOL_MKDIR, VOL_RMDIR, VOL_MKFILE, VOL_RMFILE};
+extern int hfs_truncate(struct vnode *, off_t, int, int, vfs_context_t);
-extern int hfs_volupdate(struct hfsmount *hfsmp, enum volop op, int inroot);
+extern int hfs_release_storage (struct hfsmount *hfsmp, struct filefork *datafork,
+ struct filefork *rsrcfork, u_int32_t fileid);
+
+extern int hfs_prepare_release_storage (struct hfsmount *hfsmp, struct vnode *vp);
+
+extern int hfs_bmap(struct vnode *, daddr_t, struct vnode **, daddr64_t *, unsigned int *);
+
+extern errno_t hfs_ubc_setsize(vnode_t vp, off_t len, bool have_cnode_lock);
+
+
+/*****************************************************************************
+ Functions from hfs_resize.c
+******************************************************************************/
+int hfs_extendfs(struct hfsmount *hfsmp, u_int64_t newsize, vfs_context_t context);
+int hfs_truncatefs(struct hfsmount *hfsmp, u_int64_t newsize, vfs_context_t context);
+
+
+/*****************************************************************************
+ 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, 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);
-extern void replace_desc(struct cnode *cp, struct cat_desc *cdp);
+enum {
+ HFS_FVH_WAIT = 0x0001,
+ HFS_FVH_WRITE_ALT = 0x0002,
+ HFS_FVH_FLUSH_IF_DIRTY = 0x0004,
+};
+typedef uint32_t hfs_flush_volume_header_options_t;
+int hfs_flushvolumeheader(struct hfsmount *hfsmp, hfs_flush_volume_header_options_t);
-extern int hfs_namecmp(const char *, size_t, const char *, size_t);
+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 *);
-extern int hfs_virtualmetafile(struct cnode *);
+/* If a runtime corruption is detected, mark the volume inconsistent
+ * bit in the volume attributes.
+ */
-void hfs_generate_volume_notifications(struct hfsmount *hfsmp);
+typedef enum {
+ HFS_INCONSISTENCY_DETECTED,
-__private_extern__ u_int32_t hfs_getencodingbias(void);
-__private_extern__ void hfs_setencodingbias(u_int32_t bias);
+ // Used when unable to rollback an operation that failed
+ HFS_ROLLBACK_FAILED,
-extern int hfs_vgetrsrc(struct hfsmount *hfsmp, struct vnode *vp,
- struct vnode **rvpp, struct proc *p);
+ // Used when the latter part of an operation failed, but we chose not to roll back
+ HFS_OP_INCOMPLETE,
-extern int hfs_update(struct vnode *, int);
+ // Used when someone told us to force an fsck on next mount
+ HFS_FSCK_FORCED,
+} hfs_inconsistency_reason_t;
-extern int hfs_truncate(struct vnode *, off_t, int, int, vfs_context_t);
+void hfs_mark_inconsistent(struct hfsmount *hfsmp,
+ hfs_inconsistency_reason_t reason);
-extern int hfs_fsync(struct vnode *, int, int, struct proc *);
+void hfs_scan_blocks (struct hfsmount *hfsmp);
-extern int hfs_access(struct vnode *, mode_t, struct ucred *, struct proc *);
+/*****************************************************************************
+ Functions from hfs_vfsutils.c
+******************************************************************************/
+u_int32_t BestBlockSizeFit(u_int32_t allocationBlockSize,
+ u_int32_t blockSizeLimit,
+ u_int32_t baseMultiple);
-extern int hfs_vget(struct hfsmount *, cnid_t, struct vnode **, int);
+#if CONFIG_HFS_STD
+OSErr hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
+ struct proc *p);
+#endif
+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 hfs_bmap(struct vnode *, daddr_t, struct vnode **, daddr64_t *, int *);
+OSErr hfs_ValidateHFSPlusVolumeHeader(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp);
-extern int hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid);
+extern int hfsUnmount(struct hfsmount *hfsmp, struct proc *p);
-__private_extern__ int hfs_start_transaction(struct hfsmount *hfsmp);
-__private_extern__ int hfs_end_transaction(struct hfsmount *hfsmp);
+extern bool overflow_extents(struct filefork *fp);
-extern int hfs_setextendedsecurity(struct hfsmount *hfsmp, int state);
-extern void hfs_checkextendedsecurity(struct hfsmount *hfsmp);
+extern int hfs_owner_rights(struct hfsmount *hfsmp, uid_t cnode_uid, kauth_cred_t cred,
+ struct proc *p, int invokesuperuserstatus);
-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 check_for_tracked_file(struct vnode *vp, time_t ctime, uint64_t op_type, void *arg);
+extern int check_for_dataless_file(struct vnode *vp, uint64_t op_type);
+extern int hfs_generate_document_id(struct hfsmount *hfsmp, uint32_t *docid);
+extern void hfs_pin_fs_metadata(struct hfsmount *hfsmp);
+
+/* Return information about number of metadata blocks for volume */
+extern int hfs_getinfo_metadata_blocks(struct hfsmount *hfsmp, struct hfsinfo_metadata *hinfo);
+
+/*
+ * Journal lock function prototypes
+ */
+int hfs_lock_global (struct hfsmount *hfsmp, enum hfs_locktype locktype);
+void hfs_unlock_global (struct hfsmount *hfsmp);
-extern int hfs_isallocated(struct hfsmount *, u_long, u_long);
+/* HFS mount lock/unlock prototypes */
+void hfs_lock_mount (struct hfsmount *hfsmp);
+void hfs_unlock_mount (struct hfsmount *hfsmp);
/* HFS System file locking */
#define SFL_EXTENTS 0x0002
#define SFL_BITMAP 0x0004
#define SFL_ATTRIBUTE 0x0008
-#define SFL_VALIDMASK (SFL_CATALOG | SFL_EXTENTS | SFL_BITMAP | SFL_ATTRIBUTE)
+#define SFL_STARTUP 0x0010
+#define SFL_VM_PRIV 0x0020
+#define SFL_VALIDMASK (SFL_CATALOG | SFL_EXTENTS | SFL_BITMAP | SFL_ATTRIBUTE | SFL_STARTUP | SFL_VM_PRIV)
+
+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);
+
+void hfs_metadatazone_init(struct hfsmount *hfsmp, int disable);
+
+/* 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 *);
+
+extern int hfs_start_transaction(struct hfsmount *hfsmp);
+extern int hfs_end_transaction(struct hfsmount *hfsmp);
+extern void hfs_journal_lock(struct hfsmount *hfsmp);
+extern void hfs_journal_unlock(struct hfsmount *hfsmp);
+extern void hfs_syncer_lock(struct hfsmount *hfsmp);
+extern void hfs_syncer_unlock(struct hfsmount *hfsmp);
+extern void hfs_syncer_wait(struct hfsmount *hfsmp);
+extern void hfs_syncer_wakeup(struct hfsmount *hfsmp);
+extern void hfs_syncer_queue(thread_call_t syncer);
+extern void hfs_sync_ejectable(struct hfsmount *hfsmp);
+
+typedef enum hfs_flush_mode {
+ HFS_FLUSH_JOURNAL, // Flush journal
+ HFS_FLUSH_JOURNAL_META, // Flush journal and metadata blocks
+ HFS_FLUSH_FULL, // Flush journal and does a cache flush
+ HFS_FLUSH_CACHE, // Flush track cache to media
+ HFS_FLUSH_BARRIER, // Barrier-only flush to ensure write order
+ HFS_FLUSH_JOURNAL_BARRIER // Flush journal with barrier
+} hfs_flush_mode_t;
-extern int hfs_systemfile_lock(struct hfsmount *, int, enum hfslocktype);
-extern void hfs_systemfile_unlock(struct hfsmount *, int);
+extern errno_t hfs_flush(struct hfsmount *hfsmp, hfs_flush_mode_t mode);
+
+extern void hfs_trim_callback(void *arg, uint32_t extent_count, const dk_extent_t *extents);
+
+/* Erase unused Catalog nodes due to <rdar://problem/6947811>. */
+extern int hfs_erase_unused_nodes(struct hfsmount *hfsmp);
+
+extern uint64_t hfs_usecs_to_deadline(uint64_t usecs);
+
+extern int hfs_freeze(struct hfsmount *hfsmp);
+extern int hfs_thaw(struct hfsmount *hfsmp, const struct proc *process);
+
+
+/*****************************************************************************
+ 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);
+
+typedef enum {
+ // Push all modifications to disk (including minor ones)
+ HFS_UPDATE_FORCE = 0x01,
+} hfs_update_options_t;
+
+extern int hfs_update(struct vnode *, int options);
+
+typedef enum hfs_sync_mode {
+ HFS_FSYNC,
+ HFS_FSYNC_FULL,
+ HFS_FSYNC_BARRIER
+} hfs_fsync_mode_t;
+
+extern int hfs_fsync(struct vnode *, int, hfs_fsync_mode_t, struct proc *);
+
+const struct cat_fork *
+hfs_prepare_fork_for_update(filefork_t *ff,
+ const struct cat_fork *cf,
+ struct cat_fork *cf_buf,
+ uint32_t block_size);
+
+/*****************************************************************************
+ Functions from hfs_xattr.c
+******************************************************************************/
+
+/*
+ * Maximum extended attribute size supported for all extended attributes except
+ * resource fork and finder info.
+ */
+#define HFS_XATTR_MAXSIZE INT32_MAX
+
+/* Number of bits used to represent maximum extended attribute size */
+#define HFS_XATTR_SIZE_BITS 31
+
+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);
+int init_attrdata_vnode(struct hfsmount *hfsmp);
+int hfs_xattr_read(vnode_t vp, const char *name, void *data, size_t *size);
+int hfs_getxattr_internal(cnode_t *, struct vnop_getxattr_args *,
+ struct hfsmount *, u_int32_t);
+int hfs_xattr_write(vnode_t vp, const char *name, const void *data, size_t size);
+int hfs_setxattr_internal(struct cnode *, const void *, size_t,
+ struct vnop_setxattr_args *, struct hfsmount *, u_int32_t);
+extern int hfs_removeallattr(struct hfsmount *hfsmp, u_int32_t fileid,
+ bool *open_transaction);
+extern int hfs_set_volxattr(struct hfsmount *hfsmp, unsigned int xattrtype, int state);
+
+
+
+/*****************************************************************************
+ 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_lookup_siblinglinks(struct hfsmount *hfsmp, cnid_t linkfileid,
+ cnid_t *prevlinkid, cnid_t *nextlinkid);
+extern int hfs_lookup_lastlink(struct hfsmount *hfsmp, cnid_t linkfileid,
+ cnid_t *nextlinkid, struct cat_desc *cdesc);
+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, bool have_lock);
+extern cnid_t hfs_currentcnid(cnode_t *cp);
+errno_t hfs_first_link(hfsmount_t *hfsmp, cnode_t *cp, cnid_t *link_id);
+
+
+/*****************************************************************************
+ Functions from VolumeAllocation.c
+ ******************************************************************************/
+extern int hfs_isallocated(struct hfsmount *hfsmp, u_int32_t startingBlock, u_int32_t numBlocks);
+
+extern int hfs_count_allocated(struct hfsmount *hfsmp, u_int32_t startBlock,
+ u_int32_t numBlocks, u_int32_t *alloc_count);
+
+extern int hfs_isrbtree_active (struct hfsmount *hfsmp);
+
+/*****************************************************************************
+ Functions from hfs_fsinfo.c
+ ******************************************************************************/
+extern errno_t hfs_get_fsinfo(struct hfsmount *hfsmp, void *a_data);
+extern void hfs_fsinfo_data_add(struct hfs_fsinfo_data *fsinfo, uint64_t entry);
#endif /* __APPLE_API_PRIVATE */
#endif /* KERNEL */
projects / apple / xnu.git / blobdiff