/*
- * Copyright (c) 2000-2001 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@
*/
-/* @(#)hfs.h 3.0
-*
-* (c) 1990, 1992 NeXT Computer, Inc. All Rights Reserved
-* (c) 1997-1999 Apple Computer, Inc. All Rights Reserved
-*
-* hfs.h -- constants, structures, function declarations. etc.
-* for Macintosh file system vfs.
-*
-*/
#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
+#ifdef __APPLE_API_PRIVATE
#include <sys/param.h>
-#include <sys/lock.h>
#include <sys/queue.h>
-#include <sys/attr.h>
-
+#include <sys/mount.h>
+#include <sys/vnode.h>
+#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 <vfs/vfs_journal.h>
#include <hfs/hfs_format.h>
+#include <hfs/hfs_catalog.h>
+#include <hfs/hfs_cnode.h>
#include <hfs/hfs_macos_defs.h>
#include <hfs/hfs_encodings.h>
-#include <hfs/rangelist.h>
+#include <hfs/hfs_hotfiles.h>
+#include <hfs/hfs_fsctl.h>
+
+#if CONFIG_PROTECT
+/* Forward declare the cprotect struct */
+struct cprotect;
-struct uio; // This is more effective than #include <sys/uio.h> in case KERNEL is undefined...
-struct hfslockf; // For advisory locking
+#endif
/*
* Just reported via MIG interface.
#define HFS_LINK_MAX 32767
-/*
- * Set to force READ_ONLY.
- */
-#define FORCE_READONLY 0
+#define HFS_MAX_DEFERED_ALLOC (1024*1024)
+
+// 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 (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 {
- kUndefinedFork = 0,
- kDataFork,
- kRsrcFork,
- kDirectory,
- kSysFile,
- kDefault,
- kAnyFork
-};
/* 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' */
-};
-
-#define BUFFERPTRLISTSIZE 25
-
-extern char * gBufferAddress[BUFFERPTRLISTSIZE];
-extern struct buf *gBufferHeaderPtr[BUFFERPTRLISTSIZE];
-extern int gBufferListIndex;
-extern simple_lock_data_t gBufferPtrListLock;
-
extern struct timezone gTimeZone;
-/* Flag values for bexpand: */
-#define RELEASE_BUFFER 0x00000001
-
/* How many free extents to cache per volume */
#define kMaxFreeExtents 10
-/* Internal Data structures*/
-
-struct vcb_t {
- u_int16_t vcbSigWord;
- int16_t vcbAtrb;
- int16_t vcbFlags;
- int16_t vcbVRefNum;
-
- u_int32_t vcbCrDate;
- u_int32_t vcbLsMod;
- u_int32_t vcbVolBkUp;
- u_int32_t checkedDate; /* time of last disk check */
-
- 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 altIDSector; /* location of alternate MDB/VH */
- u_int32_t hfsPlusIOPosOffset; /* Disk block where HFS+ starts */
- u_int32_t vcbVBMIOSize; /* volume bitmap I/O size */
- char * hintCachePtr; /* volume heuristicHint cache */
-
- /* cache of largest known free extents */
- u_int32_t vcbFreeExtCnt;
- HFSPlusExtentDescriptor vcbFreeExt[kMaxFreeExtents];
-
- 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;
-
-
-/* vcbFlags */
-#define kHFS_DamagedVolume 0x1 /* This volume has errors, unmount dirty */
-#define MARK_VOLUMEDAMAGED(fcb) FCBTOVCB((fcb))->vcbFlags |= kHFS_DamagedVolume;
-
+/* 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. */
/*
- * 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.
+ * HFS_MINFREE gives the minimum acceptable percentage
+ * of file system blocks which may be free (but this
+ * minimum will never exceed HFS_MAXRESERVE bytes). If
+ * the free block count drops below this level only the
+ * superuser may continue to allocate blocks.
*/
-typedef struct vfsVCB {
- ExtendedVCB vcb_vcb;
- struct hfsmount *vcb_hfsmp; /* Pointer to hfsmount structure */
-} vfsVCB_t;
+#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
+ * notifiaction levels for root volumes and non-root volumes.
+ * The various thresholds are computed as a fraction of the
+ * volume size, all capped at a certain fixed level
+ */
+
+#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*/
/* This structure describes the HFS specific mount structure data. */
typedef struct hfsmount {
- u_long hfs_mount_flags;
- u_int8_t hfs_fs_clean; /* Whether contents have been flushed in clean state */
- u_int8_t hfs_fs_ronly; /* Whether this was mounted as read-initially */
- u_int8_t hfs_unknownpermissions; /* Whether this was mounted with MNT_UNKNOWNPERMISSIONS */
-
+ 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, 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_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 */
-
- /* simple lock for shared meta renaming */
- simple_lock_data_t hfs_renamelock;
-
- /* HFS Specific */
- struct vfsVCB hfs_vcb;
- u_long hfs_private_metadata_dir; /* private/hidden directory for unlinked files */
- u_int32_t hfs_metadata_createdate;
- hfs_to_unicode_func_t hfs_get_unicode;
- unicode_to_hfs_func_t hfs_get_hfsname;
-} hfsmount_t;
-
-#define HFSPLUS_PRIVATE_DIR \
- "\xE2\x90\x80\xE2\x90\x80\xE2\x90\x80\xE2\x90\x80HFS+ Private Data"
+ 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 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 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;
+
+ // 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;
+ 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 */
+ 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];
+ 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 */
-/*****************************************************************************
-*
-* hfsnode structure
-*
-*
-*
-*****************************************************************************/
+ u_int32_t reserveBlocks; /* free block reserve */
+ u_int32_t loanedBlocks; /* blocks on loan for delayed allocations */
+ u_int32_t lockedBlocks; /* blocks reserved and locked */
-#define MAXHFSVNODELEN 31
-typedef u_char FileNameStr[MAXHFSVNODELEN+1];
+ /*
+ * 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];
-CIRCLEQ_HEAD(siblinghead, hfsnode) ; /* Head of the sibling list */
+ u_int32_t hfs_metadata_createdate;
+ hfs_to_unicode_func_t hfs_get_unicode;
+ unicode_to_hfs_func_t hfs_get_hfsname;
+
+ /* Quota variables: */
+ struct quotafile hfs_qfiles[MAXQUOTAS]; /* quota files */
+
+ /* Journaling variables: */
+ 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;
+ thread_t hfs_global_lockowner;
+ u_int32_t hfs_transaction_nesting;
+
+ /* Notification variables: */
+ 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;
+ 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;
+
+ /* 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 */
+ void * hfc_recdata; /* recording data (opaque) */
+ uint32_t hfc_maxfiles; /* maximum files to track */
+ struct vnode * hfc_filevp;
+
+#if HFS_SPARSE_DEV
+ /* Sparse device variables: */
+ struct vnode * hfs_backingfs_rootvp;
+ 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 */
-struct hfsnode {
- LIST_ENTRY(hfsnode) h_hash; /* links on valid files */
- CIRCLEQ_ENTRY(hfsnode) h_sibling; /* links on siblings */
- struct lock__bsd__ h_lock; /* node lock. */
+ 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 {
- struct hfslockf *hu_lockf; /* Head of byte-level lock list. */
- void *hu_sysdata; /* private data for system files */
- char hu_symlinkdata[4]; /* symbolic link (4 chars or less) */
- char *hu_symlinkptr; /* symbolic link pathname */
- } h_un;
- struct vnode * h_vp; /* vnode associated with this inode. */
- struct hfsfilemeta * h_meta; /* Ptr to file meta data */
- u_int16_t h_nodeflags; /* flags, see below */
- u_int8_t h_type; /* Type of info: dir, data, rsrc */
- int8_t fcbFlags; /* FCB flags */
- struct rl_head h_invalidranges;/* Areas of disk that should read back as zeroes */
- u_int64_t fcbEOF; /* Logical length or EOF in bytes */
- u_int64_t fcbPLen; /* Physical file length in bytes */
- u_int32_t fcbClmpSize; /* Number of bytes per clump */
- HFSPlusExtentRecord fcbExtents; /* Extents of file */
-
-#if HFS_DIAGNOSTIC
- u_int32_t h_valid; /* is the vnode reference valid */
+ /*
+ * 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
-};
-#define h_lockf h_un.hu_lockf
-#define fcbBTCBPtr h_un.hu_sysdata
-#define h_symlinkptr h_un.hu_symlinkptr
-#define h_symlinkdata h_un.hu_symlinkdata
-
-typedef struct hfsnode FCB;
-
-
-typedef struct hfsfilemeta {
- struct siblinghead h_siblinghead; /* Head of the sibling list */
- simple_lock_data_t h_siblinglock; /* sibling list lock. */
- u_int32_t h_metaflags; /* IN_LONGNAME, etc */
- struct vnode *h_devvp; /* vnode for block I/O. */
-
- dev_t h_dev; /* Device associated with the inode. */
- u_int32_t h_nodeID; /* specific id of this node */
- u_int32_t h_dirID; /* Parent Directory ID */
- u_int32_t h_hint; /* Catalog hint */
-
- off_t h_size; /* Total physical size of object */
- u_int16_t h_usecount; /* How many siblings */
- u_int16_t h_mode; /* IFMT, permissions; see below. */
- u_int32_t h_pflags; /* Permission flags (NODUMP, IMMUTABLE, APPEND etc.) */
- u_int32_t h_uid; /* File owner. */
- u_int32_t h_gid; /* File group. */
- union {
- dev_t hu_rdev; /* Special device info for this node */
- u_int32_t hu_indnodeno; /* internal indirect node number (never exported) */
- } h_spun;
- u_int32_t h_crtime; /* BSD-format creation date in secs. */
- u_int32_t h_atime; /* BSD-format access date in secs. */
- u_int32_t h_mtime; /* BSD-format mod date in seconds */
- u_int32_t h_ctime; /* BSD-format status change date */
- u_int32_t h_butime; /* BSD-format last backup date in secs. */
- u_int16_t h_nlink; /* link count (aprox. for dirs) */
- u_short h_namelen; /* Length of name string */
- char * h_namePtr; /* Points the name of the file */
- FileNameStr h_fileName; /* CName of file */
-} hfsfilemeta;
-#define h_rdev h_spun.hu_rdev
-#define h_indnodeno h_spun.hu_indnodeno
-
-#define H_EXTENDSIZE(VP,BYTES) ((VP)->h_meta->h_size += (BYTES))
-#define H_TRUNCSIZE(VP,BYTES) ((VP)->h_meta->h_size -= (BYTES))
-
-#define MAKE_INODE_NAME(name,linkno) \
- (void) sprintf((name), "%s%d", HFS_INODE_PREFIX, (linkno))
-
-/*
- * Macros for quick access to fields buried in the fcb inside an hfs node:
- */
-#define H_FORKTYPE(HP) ((HP)->h_type)
-#define H_FILEID(HP) ((HP)->h_meta->h_nodeID)
-#define H_DIRID(HP) ((HP)->h_meta->h_dirID)
-#define H_NAME(HP) ((HP)->h_meta->h_namePtr)
-#define H_HINT(HP) ((HP)->h_meta->h_hint)
-#define H_DEV(HP) ((HP)->h_meta->h_dev)
-
-#define H_ISBIGLINK(HP) ((HP)->fcbEOF > 4)
-#define H_SYMLINK(HP) (H_ISBIGLINK((HP)) ? (HP)->h_symlinkptr : (HP)->h_symlinkdata)
-
-/* These flags are kept in flags. */
-#define IN_ACCESS 0x0001 /* Access time update request. */
-#define IN_CHANGE 0x0002 /* Change time update request. */
-#define IN_UPDATE 0x0004 /* Modification time update request. */
-#define IN_MODIFIED 0x0008 /* Node has been modified. */
-#define IN_RENAME 0x0010 /* Node is being renamed. */
-#define IN_SHLOCK 0x0020 /* File has shared lock. */
-#define IN_EXLOCK 0x0040 /* File has exclusive lock. */
-#define IN_BYCNID 0x0100 /* Dir was found by CNID */
-#define IN_ALLOCATING 0x1000 /* vnode is in transit, wait or ignore */
-#define IN_WANT 0x2000 /* Its being waited for */
-
-/* These flags are kept in meta flags. */
-#define IN_LONGNAME 0x0400 /* File has long name buffer. */
-#define IN_UNSETACCESS 0x0200 /* File has unset access. */
-#define IN_DELETED 0x0800 /* File has been marked to be deleted */
-#define IN_NOEXISTS 0x1000 /* File has been deleted, catalog entry is gone */
-#if HFS_HARDLINKS
-#define IN_DATANODE 0x2000 /* File is a data node (hard-linked) */
#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 */
-/* File permissions stored in mode */
-#define IEXEC 0000100 /* Executable. */
-#define IWRITE 0000200 /* Writeable. */
-#define IREAD 0000400 /* Readable. */
-#define ISVTX 0001000 /* Sticky bit. */
-#define ISGID 0002000 /* Set-gid. */
-#define ISUID 0004000 /* Set-uid. */
+ // Records the oldest outstanding sync request
+ struct timeval hfs_sync_req_oldest;
-/* File types */
-#define IFMT 0170000 /* Mask of file type. */
-#define IFIFO 0010000 /* Named pipe (fifo). */
-#define IFCHR 0020000 /* Character device. */
-#define IFDIR 0040000 /* Directory file. */
-#define IFBLK 0060000 /* Block device. */
-#define IFREG 0100000 /* Regular file. */
-#define IFLNK 0120000 /* Symbolic link. */
-#define IFSOCK 0140000 /* UNIX domain socket. */
-#define IFWHT 0160000 /* Whiteout. */
+ // Records whether a sync has been queued or is in progress
+ boolean_t hfs_sync_incomplete;
-/* Value to make sure vnode is real and defined */
-#define HFS_VNODE_MAGIC 0x4846532b /* 'HFS+' */
+ thread_call_t hfs_syncer; // removeable devices get sync'ed by this guy
-/* To test wether the forkType is a sibling type */
-#define SIBLING_FORKTYPE(FORK) ((FORK==kDataFork) || (FORK==kRsrcFork))
+ /* Records the syncer thread so that we can avoid the syncer
+ queing more syncs. */
+ thread_t hfs_syncer_thread;
-/*
- * Write check macro
- */
-#define WRITE_CK(VNODE, FUNC_NAME) { \
- if ((VNODE)->v_mount->mnt_flag & MNT_RDONLY) { \
- DBG_ERR(("%s: ATTEMPT TO WRITE A READONLY VOLUME\n", \
- FUNC_NAME)); \
- return(EROFS); \
- } \
-}
+ // 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;
/*
- * hfsmount locking and unlocking.
- *
- * mvl_lock_flags
+ * 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.
*/
-#define MVL_LOCKED 0x00000001 /* debug only */
+enum {
+ HFS_META_DELAY = 100 * 1000, // 0.1 secs
+ HFS_MAX_META_DELAY = 5000 * 1000 // 5 secs
+};
-#if HFS_DIAGNOSTIC
-#define MVL_LOCK(mvip) { \
- (simple_lock(&(mvip)->mvl_lock)); \
- (mvip)->mvl_flags |= MVL_LOCKED; \
-}
+typedef hfsmount_t ExtendedVCB;
-#define MVL_UNLOCK(mvip) { \
- if(((mvip)->mvl_flags & MVL_LOCKED) == 0) { \
- panic("MVL_UNLOCK - hfsnode not locked"); \
- } \
- (simple_unlock(&(mvip)->mvl_lock)); \
- (mvip)->mvl_flags &= ~MVL_LOCKED; \
-}
-#else /* HFS_DIAGNOSTIC */
-#define MVL_LOCK(mvip) (simple_lock(&(mvip)->mvl_lock))
-#define MVL_UNLOCK(mvip) (simple_unlock(&(mvip)->mvl_lock))
-#endif /* HFS_DIAGNOSTIC */
+/* Aliases for legacy (Mac OS 9) field names */
+#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
+static inline void MarkVCBDirty(hfsmount_t *hfsmp)
+{
+ hfsmp->hfs_header_dirty = true;
+}
-/* 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;
+static inline void MarkVCBClean(hfsmount_t *hfsmp)
+{
+ hfsmp->hfs_header_dirty = false;
+ hfsmp->hfs_header_minor_change = false;
+}
-#define AVERAGE_HFSDIRENTRY_SIZE (8+22+4)
-#define MAX_HFSDIRENTRY_SIZE sizeof(struct dirent)
+static inline bool IsVCBDirty(ExtendedVCB *vcb)
+{
+ return vcb->hfs_header_minor_change || vcb->hfs_header_dirty;
+}
-#define DIRENTRY_SIZE(namlen) \
- ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))
+// 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;
+}
-enum {
- kCatNameIsAllocated = 0x1, /* The name is malloc'd and is in cnm_nameptr */
- kCatNameIsMangled = 0x2, /* The name is mangled */
- kCatNameUsesReserved = 0x4, /* It overides the space reserved by cnm_namespace into cndu_extra, careful */
- kCatNameIsConsumed = 0x8, /* The name has been already processed, no freeing or work is needed */
- kCatNameNoCopyName = 0x10, /* Dont copy the name */
- kCatNameMangleName = 0x20 /* Mangle name if greater than passed in length */
-};
+// 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)));
+}
/*
- * CatalogNameSpecifier is a structure that contains a name and possibly its form
+ * There are two private directories in HFS+.
*
- * Special care needs to be taken with the flags, they can cause side effects.
+ * One contains inodes for files that are hardlinked or open/unlinked.
+ * The other contains inodes for directories that are hardlinked.
*/
-struct CatalogNameSpecifier {
- u_int16_t cnm_flags; /* See above */
- u_int16_t cnm_length; /* Length of the name */
- u_int32_t cnm_parID; /* ID of the parent directory */
- unsigned char *cnm_nameptr; /* If allocated, a ptr to the space, else NULL */
- unsigned char cnm_namespace[MAXHFSVNODELEN+1]; /* Space where the name can be kept */
-};
-/*
- * NOTE IT IS REQUIRED that KMaxMangleNameLen >= MAXHFSVNODELEN
- * Also the total size of CatalogNameSpecifier should be less then cndu_extra, which
- * currently it easily is, this is not a requirement, just a nicety.
- *
- * The rules to how to store a name:
- * If its less than MAXHFSVNODELEN always store it in cnm_namespace.
- * If we can get by doing mangling then cnm_namespace
- * else allocate the space needed to cnm_nameptr.
- * This reflects what is done at vnode creation.
+enum privdirtype {FILE_HARDLINKS, DIR_HARDLINKS};
+
+#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++; \
+ } \
-enum {
- kCatalogFolderNode = 1,
- kCatalogFileNode = 2
-};
+#define DEC_FOLDERCOUNT(hfsmp, cattr) \
+ if ((hfsmp->hfs_flags & HFS_FOLDERCOUNT) && \
+ (cattr.ca_recflags & kHFSHasFolderCountMask) && \
+ (cattr.ca_dircount > 0)) { \
+ cattr.ca_dircount--; \
+ } \
-/*
- * CatalogNodeData has same layout as the on-disk HFS Plus file/dir records.
- * Classic hfs file/dir records are converted to match this layout.
- *
- * The cnd_extra padding allows big hfs plus thread records (520 bytes max)
- * to be read onto this stucture during a cnid lookup.
- *
- * IMPORTANT!!!!!!
- * After declaring this structure, you must use the macro INIT_CATALOGDATA to prepare it
- * and CLEAN_CATALOGDATA after using it, to clean any allocated structures.
- *
- * If you do not need to have the name, then pass in kCatNameNoCopyName for flags
+typedef struct filefork FCB;
+
+/*
+ * Macros for creating item names for our special/private directories.
*/
-struct CatalogNodeData {
- int16_t cnd_type;
- u_int16_t cnd_flags;
- u_int32_t cnd_valence; /* dirs only */
- u_int32_t cnd_nodeID;
- u_int32_t cnd_createDate;
- u_int32_t cnd_contentModDate;
- u_int32_t cnd_attributeModDate;
- u_int32_t cnd_accessDate;
- u_int32_t cnd_backupDate;
- u_int32_t cnd_ownerID;
- u_int32_t cnd_groupID;
- u_int8_t cnd_adminFlags; /* super-user changeable flags */
- u_int8_t cnd_ownerFlags; /* owner changeable flags */
- u_int16_t cnd_mode; /* file type + permission bits */
- union {
- u_int32_t cndu_iNodeNum; /* indirect links only */
- u_int32_t cndu_linkCount; /* indirect nodes only */
- u_int32_t cndu_rawDevice; /* special files (FBLK and FCHR) only */
- } cnd_un;
- u_int8_t cnd_finderInfo[32];
- u_int32_t cnd_textEncoding;
- u_int32_t cnd_reserved;
- HFSPlusForkData cnd_datafork;
- HFSPlusForkData cnd_rsrcfork;
- u_int32_t cnd_iNodeNumCopy;
- u_int32_t cnd_linkCNID; /* for hard links only */
- u_int8_t cnd_extra[264]; /* make struct at least 520 bytes long */
- struct CatalogNameSpecifier cnd_namespecifier;
-};
-typedef struct CatalogNodeData CatalogNodeData;
-
-#define cnd_iNodeNum cnd_un.cndu_iNodeNum
-#define cnd_linkCount cnd_un.cndu_linkCount
-#define cnd_rawDevice cnd_un.cndu_rawDevice
-
-#define cnm_flags cnd_namespecifier.cnm_flags
-#define cnm_length cnd_namespecifier.cnm_length
-#define cnm_parID cnd_namespecifier.cnm_parID
-#define cnm_nameptr cnd_namespecifier.cnm_nameptr
-#define cnm_namespace cnd_namespecifier.cnm_namespace
-
-#define INIT_CATALOGDATA(C,F) do { bzero(&((C)->cnd_namespecifier), sizeof(struct CatalogNameSpecifier)); (C)->cnm_flags=(F);}while(0);
-#if HFS_DIAGNOSTIC
-extern void debug_check_catalogdata(struct CatalogNodeData *cat);
-#define CLEAN_CATALOGDATA(C) do { debug_check_catalogdata(C); \
- if ((C)->cnm_flags & kCatNameIsAllocated) {\
- FREE((C)->cnm_nameptr, M_TEMP);\
- (C)->cnm_flags &= ~kCatNameIsAllocated;\
- (C)->cnm_nameptr = NULL;\
- }}while(0);
-#else
-#define CLEAN_CATALOGDATA(C) do { if ((C)->cnm_flags & kCatNameIsAllocated) {\
- FREE((C)->cnm_nameptr, M_TEMP);\
- (C)->cnm_flags &= ~kCatNameIsAllocated;\
- (C)->cnm_nameptr = NULL;\
- }}while(0);
-#endif
+#define MAKE_INODE_NAME(name, size, linkno) \
+ (void) snprintf((name), size, "%s%d", HFS_INODE_PREFIX, (linkno))
+#define HFS_INODE_PREFIX_LEN 5
-/* structure to hold a catalog record information */
-/* Of everything you wanted to know about a catalog entry, file and directory */
-typedef struct hfsCatalogInfo {
- CatalogNodeData nodeData;
- u_int32_t hint;
-} hfsCatalogInfo;
+#define MAKE_DIRINODE_NAME(name, size, linkno) \
+ (void) snprintf((name), size, "%s%d", HFS_DIRINODE_PREFIX, (linkno))
+#define HFS_DIRINODE_PREFIX_LEN 4
-enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };
+#define MAKE_DELETED_NAME(NAME, size, FID) \
+ (void) snprintf((NAME), size, "%s%d", HFS_DELETE_PREFIX, (FID))
+#define HFS_DELETE_PREFIX_LEN 4
-enum { kdirentMaxNameBytes = NAME_MAX };
-// structure definition of the searchfs system trap for the search criterea.
-struct directoryInfoSpec
-{
- u_long numFiles;
-};
+#define HFS_AVERAGE_NAME_SIZE 22
+#define AVERAGE_HFSDIRENTRY_SIZE (8+HFS_AVERAGE_NAME_SIZE+4)
-struct fileInfoSpec
-{
- off_t dataLogicalLength;
- off_t dataPhysicalLength;
- off_t resourceLogicalLength;
- off_t resourcePhysicalLength;
-};
+#define STD_DIRENT_LEN(namlen) \
+ ((sizeof(struct dirent) - (NAME_MAX+1)) + (((namlen)+1 + 3) &~ 3))
-struct searchinfospec
-{
- u_char name[kHFSPlusMaxFileNameBytes];
- u_long nameLength;
- char attributes; // see IM:Files 2-100
- u_long nodeID;
- u_long parentDirID;
- struct timespec creationDate;
- struct timespec modificationDate;
- struct timespec changeDate;
- struct timespec lastBackupDate;
- u_long finderInfo[8];
- uid_t uid;
- gid_t gid;
- mode_t mask;
- struct fileInfoSpec f;
- struct directoryInfoSpec d;
-};
-typedef struct searchinfospec searchinfospec_t;
-
-#define HFSTIMES(hp, t1, t2) { \
- if ((hp)->h_nodeflags & (IN_ACCESS | IN_CHANGE | IN_UPDATE)) { \
- (hp)->h_nodeflags |= IN_MODIFIED; \
- if ((hp)->h_nodeflags & IN_ACCESS) { \
- (hp)->h_meta->h_atime = (t1)->tv_sec; \
- }; \
- if ((hp)->h_nodeflags & IN_UPDATE) { \
- (hp)->h_meta->h_mtime = (t2)->tv_sec; \
- } \
- if ((hp)->h_nodeflags & IN_CHANGE) { \
- (hp)->h_meta->h_ctime = time.tv_sec; \
- }; \
- (hp)->h_nodeflags &= ~(IN_ACCESS | IN_CHANGE | IN_UPDATE); \
- } \
-}
+#define EXT_DIRENT_LEN(namlen) \
+ ((sizeof(struct direntry) + (namlen) - (MAXPATHLEN-1) + 7) & ~7)
+
+
+enum { kHFSPlusMaxFileNameBytes = kHFSPlusMaxFileNameChars * 3 };
-/* This overlays the fid structure (see mount.h). */
-struct hfsfid {
- u_int16_t hfsfid_len; /* Length of structure. */
- u_int16_t hfsfid_pad; /* Force 32-bit alignment. */
- /* The following data is filesystem-dependent, up to MAXFIDSZ (16) bytes: */
- u_int32_t hfsfid_cnid; /* Catalog node ID. */
- u_int32_t hfsfid_gen; /* Generation number (create date). */
-};
/* macro to determine if hfs or hfsplus */
#define ISHFSPLUS(VCB) ((VCB)->vcbSigWord == kHFSPlusSigWord)
#define ISHFS(VCB) ((VCB)->vcbSigWord == kHFSSigWord)
-/*
- * Various ways to acquire a VNode pointer:
- */
-#define HTOV(HP) ((HP)->h_vp)
-
-/*
- * Various ways to acquire an HFS Node pointer:
- */
-#define VTOH(VP) ((struct hfsnode *)((VP)->v_data))
-#define FCBTOH(FCB) ((struct hfsnode *)FCB)
-
-/*
- * Various ways to acquire an FCB pointer:
- */
-#define HTOFCB(HP) (HP)
-#define VTOFCB(VP) ((FCB *)((VP)->v_data)) /* Should be the same as VTOH */
-
/*
* Various ways to acquire a VFS mount point pointer:
*/
-#define VTOVFS(VP) ((VP)->v_mount)
-#define HTOVFS(HP) ((HP)->h_vp->v_mount)
-#define FCBTOVFS(FCB) ((FCB)->h_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 HTOHFS(HP) ((struct hfsmount *)(HP)->h_vp->v_mount->mnt_data)
-#define FCBTOHFS(FCB) ((struct hfsmount *)(FCB)->h_vp->v_mount->mnt_data)
-#define VFSTOHFS(MP) ((struct hfsmount *)(MP)->mnt_data)
-#define VCBTOHFS(VCB) (((struct vfsVCB *)(VCB))->vcb_hfsmp)
+#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 HTOVCB(HP) (&(((struct hfsmount *)((HP)->h_vp->v_mount->mnt_data))->hfs_vcb.vcb_vcb))
-#define FCBTOVCB(FCB) (&(((struct hfsmount *)((FCB)->h_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 VTOVCB(VP) VTOHFS(VP)
+#define VFSTOVCB(MP) VFSTOHFS(MP)
+#define HFSTOVCB(HFSMP) (HFSMP)
+#define FCBTOVCB(FCB) FCBTOHFS(FCB)
#define E_NONE 0
#define kHFSBlockSize 512
-#define IOBLKNOFORBLK(STARTINGBLOCK, BLOCKSIZEINBYTES) ((daddr_t)((STARTINGBLOCK) / ((BLOCKSIZEINBYTES) >> 9)))
-#define IOBLKCNTFORBLK(STARTINGBLOCK, BYTESTOTRANSFER, BLOCKSIZEINBYTES) \
- ((int)(IOBLKNOFORBYTE(((STARTINGBLOCK) * 512) + (BYTESTOTRANSFER) - 1, (BLOCKSIZEINBYTES)) - \
- IOBLKNOFORBLK((STARTINGBLOCK), (BLOCKSIZEINBYTES)) + 1))
-#define IOBYTECCNTFORBLK(STARTINGBLOCK, BYTESTOTRANSFER, BLOCKSIZEINBYTES) \
- (IOBLKCNTFORBLK((STARTINGBLOCK),(BYTESTOTRANSFER),(BLOCKSIZEINBYTES)) * (BLOCKSIZEINBYTES))
-#define IOBYTEOFFSETFORBLK(STARTINGBLOCK, BLOCKSIZEINBYTES) \
- (((STARTINGBLOCK) * 512) - \
- (IOBLKNOFORBLK((STARTINGBLOCK), (BLOCKSIZEINBYTES)) * (BLOCKSIZEINBYTES)))
+/*
+ * Macros for getting the MDB/VH sector and offset
+ */
+#define HFS_PRI_SECTOR(blksize) (1024 / (blksize))
+#define HFS_PRI_OFFSET(blksize) ((blksize) > 1024 ? 1024 : 0)
-#define IOBLKNOFORBYTE(STARTINGBYTE, BLOCKSIZEINBYTES) ((daddr_t)((STARTINGBYTE) / (BLOCKSIZEINBYTES)))
-#define IOBLKCNTFORBYTE(STARTINGBYTE, BYTESTOTRANSFER, BLOCKSIZEINBYTES) \
-((int)(IOBLKNOFORBYTE((STARTINGBYTE) + (BYTESTOTRANSFER) - 1, (BLOCKSIZEINBYTES)) - \
- IOBLKNOFORBYTE((STARTINGBYTE), (BLOCKSIZEINBYTES)) + 1))
-#define IOBYTECNTFORBYTE(STARTINGBYTE, BYTESTOTRANSFER, BLOCKSIZEINBYTES) \
- (IOBLKCNTFORBYTE((STARTINGBYTE),(BYTESTOTRANSFER),(BLOCKSIZEINBYTES)) * (BLOCKSIZEINBYTES))
-#define IOBYTEOFFSETFORBYTE(STARTINGBYTE, BLOCKSIZEINBYTES) ((STARTINGBYTE) - (IOBLKNOFORBYTE((STARTINGBYTE), (BLOCKSIZEINBYTES)) * (BLOCKSIZEINBYTES)))
+#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_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 HFS_PRI_SECTOR(blksize) (1024 / (blksize))
-#define HFS_PRI_OFFSET(blksize) ((blksize) > 1024 ? 1024 : 0)
-#define HFS_ALT_SECTOR(blksize, blkcnt) (((blkcnt) - 1) - (512 / (blksize)))
-#define HFS_ALT_OFFSET(blksize) ((blksize) > 1024 ? (blksize) - 1024 : 0)
-#define MAKE_VREFNUM(x) ((int32_t)((x) & 0xffff))
/*
* This is the straight GMT conversion constant:
* 00:00:00 January 1, 1970 - 00:00:00 January 1, 1904
*/
#define MAC_GMT_FACTOR 2082844800UL
-#define HFS_ATTR_CMN_LOOKUPMASK (ATTR_CMN_SCRIPT | ATTR_CMN_FNDRINFO | ATTR_CMN_NAMEDATTRCOUNT | ATTR_CMN_NAMEDATTRLIST)
-#define HFS_ATTR_DIR_LOOKUPMASK (ATTR_DIR_LINKCOUNT | ATTR_DIR_ENTRYCOUNT)
-#define HFS_ATTR_FILE_LOOKUPMASK (ATTR_FILE_LINKCOUNT | ATTR_FILE_TOTALSIZE | ATTR_FILE_ALLOCSIZE | \
- ATTR_FILE_DATALENGTH | ATTR_FILE_DATAALLOCSIZE | ATTR_FILE_DATAEXTENTS | \
- ATTR_FILE_RSRCLENGTH | ATTR_FILE_RSRCALLOCSIZE | ATTR_FILE_RSRCEXTENTS)
+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
+}
-u_int32_t to_bsd_time(u_int32_t hfs_time);
-u_int32_t to_hfs_time(u_int32_t bsd_time);
+/*
+ * 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
-int hfs_flushfiles(struct mount *mp, int flags);
-short hfs_flushMDB(struct hfsmount *hfsmp, int waitfor);
-short hfs_flushvolumeheader(struct hfsmount *hfsmp, int waitfor);
+/*****************************************************************************
+ FUNCTION PROTOTYPES
+******************************************************************************/
-short hfs_getcatalog (ExtendedVCB *vcb, u_int32_t dirID, char *name, short len, hfsCatalogInfo *catInfo);
-short hfsMoveRename (ExtendedVCB *vcb, u_int32_t oldDirID, char *oldName, u_int32_t newDirID, char *newName, u_int32_t *hint);
-short hfsCreate (ExtendedVCB *vcb, u_int32_t dirID, char *name, int mode, u_int32_t tehint);
-short hfsCreateFileID (ExtendedVCB *vcb, u_int32_t parentDirID, StringPtr name, u_int32_t catalogHint, u_int32_t *fileIDPtr);
-short hfs_vcreate (ExtendedVCB *vcb, hfsCatalogInfo *catInfo, u_int8_t forkType, struct vnode **vpp);
-short hfsDelete (ExtendedVCB *vcb, u_int32_t parentDirID, StringPtr name, short isfile, u_int32_t catalogHint);
-short 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_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
-extern int hfs_metafilelocking(struct hfsmount *hfsmp, u_long fileID, u_int flags, struct proc *p);
-extern int hasOverflowExtents(struct hfsnode *hp);
-void hfs_set_metaname(char *, struct hfsfilemeta *, struct hfsmount *);
+/*****************************************************************************
+ Functions from MacOSStubs.c
+******************************************************************************/
+time_t to_bsd_time(u_int32_t hfs_time);
-short MacToVFSError(OSErr err);
-int hfs_owner_rights(struct vnode *vp, struct ucred *cred, struct proc *p, Boolean invokesuperuserstatus);
-
-void CopyVNodeToCatalogNode (struct vnode *vp, struct CatalogNodeData *nodeData);
-void CopyCatalogToHFSNode(struct hfsCatalogInfo *catalogInfo, struct hfsnode *hp);
-u_long FindMetaDataDirectory(ExtendedVCB *vcb);
-
-
-short make_dir_entry(FCB **fileptr, char *name, u_int32_t fileID);
-
-int AttributeBlockSize(struct attrlist *attrlist);
-void PackCommonAttributeBlock(struct attrlist *alist,
- struct vnode *vp,
- struct hfsCatalogInfo *catInfo,
- void **attrbufptrptr,
- void **varbufptrptr);
-void PackVolAttributeBlock(struct attrlist *alist,
- struct vnode *vp,
- struct hfsCatalogInfo *catInfo,
- void **attrbufptrptr,
- void **varbufptrptr);
-void PackFileDirAttributeBlock(struct attrlist *alist,
- struct vnode *vp,
- struct hfsCatalogInfo *catInfo,
- void **attrbufptrptr,
- void **varbufptrptr);
-void PackForkAttributeBlock(struct attrlist *alist,
- struct vnode *vp,
- struct hfsCatalogInfo *catInfo,
- void **attrbufptrptr,
- void **varbufptrptr);
-void PackAttributeBlock(struct attrlist *alist,
- struct vnode *vp,
- struct hfsCatalogInfo *catInfo,
- void **attrbufptrptr,
- void **varbufptrptr);
-void PackCatalogInfoAttributeBlock (struct attrlist *alist,
- struct vnode * root_vp,
- struct hfsCatalogInfo *catInfo,
- void **attrbufptrptr,
- void **varbufptrptr);
-void UnpackCommonAttributeBlock(struct attrlist *alist,
- struct vnode *vp,
- struct hfsCatalogInfo *catInfo,
- void **attrbufptrptr,
- void **varbufptrptr);
-void UnpackAttributeBlock(struct attrlist *alist,
- struct vnode *vp,
- struct hfsCatalogInfo *catInfo,
- void **attrbufptrptr,
- void **varbufptrptr);
-unsigned long BestBlockSizeFit(unsigned long allocationBlockSize,
- unsigned long blockSizeLimit,
- unsigned long baseMultiple);
+u_int32_t to_hfs_time(time_t bsd_time);
+
+
+/*****************************************************************************
+ Functions from hfs_encodinghint.c
+******************************************************************************/
+u_int32_t hfs_pickencoding(const u_int16_t *src, int len);
+
+u_int32_t hfs_getencodingbias(void);
+
+void hfs_setencodingbias(u_int32_t bias);
-OSErr hfs_MountHFSVolume(struct hfsmount *hfsmp, HFSMasterDirectoryBlock *mdb,
- struct proc *p);
-OSErr hfs_MountHFSPlusVolume(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp,
- off_t embeddedOffset, off_t disksize, struct proc *p);
-OSStatus GetInitializedVNode(struct hfsmount *hfsmp, struct vnode **tmpvnode);
+
+/*****************************************************************************
+ Functions from hfs_encodings.c
+******************************************************************************/
+void hfs_converterinit(void);
+
+int hfs_relconverter (u_int32_t encoding);
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,
+#if CONFIG_HFS_STD
+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);
+
+int unicode_to_hfs(ExtendedVCB *vcb, ByteCount srcLen, u_int16_t* srcStr, Str31 dstStr, int retry);
+#endif
+
+/*****************************************************************************
+ 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 *);
+
+/* 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
+
+//
+// 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);
+
+//
+// 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 hfs_pin_overflow_extents (struct hfsmount *hfsmp, uint32_t fileid, uint8_t forktype, uint32_t *pinned);
+
+
+/* Flags for HFS truncate */
+#define HFS_TRUNCATE_SKIPTIMES 0x00000002 /* implied by skipupdate; it is a subset */
+
+
+extern int hfs_truncate(struct vnode *, off_t, int, int, vfs_context_t);
+
+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);
+
+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_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.
+ */
+
+typedef enum {
+ HFS_INCONSISTENCY_DETECTED,
+
+ // Used when unable to rollback an operation that failed
+ HFS_ROLLBACK_FAILED,
+
+ // Used when the latter part of an operation failed, but we chose not to roll back
+ HFS_OP_INCOMPLETE,
+
+ // Used when someone told us to force an fsck on next mount
+ HFS_FSCK_FORCED,
+} hfs_inconsistency_reason_t;
+
+void hfs_mark_inconsistent(struct hfsmount *hfsmp,
+ hfs_inconsistency_reason_t reason);
+
+void hfs_scan_blocks (struct hfsmount *hfsmp);
+
+/*****************************************************************************
+ Functions from hfs_vfsutils.c
+******************************************************************************/
+u_int32_t BestBlockSizeFit(u_int32_t allocationBlockSize,
+ u_int32_t blockSizeLimit,
+ u_int32_t baseMultiple);
+
+#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);
+
+OSErr hfs_ValidateHFSPlusVolumeHeader(struct hfsmount *hfsmp, HFSPlusVolumeHeader *vhp);
+
+extern int hfsUnmount(struct hfsmount *hfsmp, struct proc *p);
+
+extern bool 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);
+
+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);
+
+/* 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_CATALOG 0x0001
+#define SFL_EXTENTS 0x0002
+#define SFL_BITMAP 0x0004
+#define SFL_ATTRIBUTE 0x0008
+#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 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 */
#endif /* __HFS__ */
projects / apple / xnu.git / blobdiff