/*
- * Copyright (c) 2002 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2002-2005 Apple Computer, 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_CNODE_H_
#define _HFS_CNODE_H_
#ifdef KERNEL
#ifdef __APPLE_API_PRIVATE
#include <sys/types.h>
-#include <sys/lock.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/quota.h>
+#include <kern/locks.h>
+
#include <hfs/hfs_catalog.h>
#include <hfs/rangelist.h>
* Reading or writing any of these fields requires holding cnode lock.
*/
struct filefork {
- struct cnode *ff_cp; /* cnode associated with this fork */
- struct rl_head ff_invalidranges; /* Areas of disk that should read back as zeroes */
+ struct cnode *ff_cp; /* cnode associated with this fork */
+ struct rl_head ff_invalidranges; /* Areas of disk that should read back as zeroes */
union {
- struct hfslockf *ffu_lockf; /* Head of byte-level lock list. */
- void *ffu_sysdata; /* private data for system files */
- char *ffu_symlinkptr; /* symbolic link pathname */
- } ff_un;
- struct cat_fork ff_data;
- u_int32_t ff_unallocblocks; /* unallocated blocks (until cmap) */
+ void *ffu_sysfileinfo; /* additional info for system files */
+ char *ffu_symlinkptr; /* symbolic link pathname */
+ } ff_union;
+ struct cat_fork ff_data; /* fork data (size, extents) */
};
+typedef struct filefork filefork_t;
/* Aliases for common fields */
-#define ff_size ff_data.cf_size
-#define ff_clumpsize ff_data.cf_clump
-#define ff_blocks ff_data.cf_blocks
-#define ff_extents ff_data.cf_extents
-#define ff_symlinkptr ff_un.ffu_symlinkptr
-#define ff_lockf ff_un.ffu_lockf
+#define ff_size ff_data.cf_size
+#define ff_clumpsize ff_data.cf_clump
+#define ff_bytesread ff_data.cf_bytesread
+#define ff_blocks ff_data.cf_blocks
+#define ff_extents ff_data.cf_extents
+#define ff_unallocblocks ff_data.cf_vblocks
-
-/* The btree code still needs these... */
-#define fcbEOF ff_size
-#define fcbClmpSize ff_clumpsize
-#define fcbExtents ff_extents
-#define fcbBTCBPtr ff_un.ffu_sysdata
+#define ff_symlinkptr ff_union.ffu_symlinkptr
+#define ff_sysfileinfo ff_union.ffu_sysfileinfo
-/*
- * Directory index entry
- */
-struct hfs_index {
- SLIST_ENTRY(hfs_index) hi_link;
- int hi_index;
- void *hi_thread; /* thread that created index entry */
- char hi_name[1];
-};
+/* The btree code still needs these... */
+#define fcbEOF ff_size
+#define fcbExtents ff_extents
+#define fcbBTCBPtr ff_sysfileinfo
+typedef u_int8_t atomicflag_t;
+
/*
* The cnode is used to represent each active (or recently active)
* file or directory in the HFS filesystem.
* Reading or writing any of these fields requires holding c_lock.
*/
struct cnode {
- struct lock__bsd__ c_lock; /* cnode's lock */
+ lck_rw_t c_rwlock; /* cnode's lock */
+ void * c_lockowner; /* cnode's lock owner (exclusive case only) */
+ lck_rw_t c_truncatelock; /* protects file from truncation during read/write */
LIST_ENTRY(cnode) c_hash; /* cnode's hash chain */
u_int32_t c_flag; /* cnode's runtime flags */
+ u_int32_t c_hflag; /* cnode's flags for maintaining hash - protected by global hash lock */
struct vnode *c_vp; /* vnode for data fork or dir */
struct vnode *c_rsrc_vp; /* vnode for resource fork */
struct vnode *c_devvp; /* vnode for block I/O */
dev_t c_dev; /* cnode's device */
struct dquot *c_dquot[MAXQUOTAS]; /* cnode's quota info */
- cnid_t c_childhint; /* catalog hint for children */
+ struct klist c_knotes; /* knotes attached to this vnode */
+ u_long c_childhint; /* catalog hint for children */
struct cat_desc c_desc; /* cnode's descriptor */
struct cat_attr c_attr; /* cnode's attributes */
- SLIST_HEAD(hfs_indexhead, hfs_index) c_indexlist; /* directory index list */
+ TAILQ_HEAD(hfs_hinthead, directoryhint) c_hintlist; /* directory hint list */
+ int16_t c_dirhinttag; /* directory hint tag */
+ union {
+ int16_t cu_dirhintcnt; /* directory hint count */
+ int16_t cu_syslockcount; /* system file use only */
+ } c_union;
struct filefork *c_datafork; /* cnode's data fork */
struct filefork *c_rsrcfork; /* cnode's rsrc fork */
+ atomicflag_t c_touch_acctime;
+ atomicflag_t c_touch_chgtime;
+ atomicflag_t c_touch_modtime;
};
+typedef struct cnode cnode_t;
/* Aliases for common cnode fields */
#define c_cnid c_desc.cd_cnid
#define c_rdev c_attr.ca_rdev
#define c_atime c_attr.ca_atime
#define c_mtime c_attr.ca_mtime
-#define c_mtime_nsec c_attr.ca_mtime_nsec
#define c_ctime c_attr.ca_ctime
#define c_itime c_attr.ca_itime
#define c_btime c_attr.ca_btime
#define c_flags c_attr.ca_flags
#define c_finderinfo c_attr.ca_finderinfo
#define c_blocks c_attr.ca_blocks
+#define c_attrblks c_attr.ca_attrblks
#define c_entries c_attr.ca_entries
#define c_zftimeout c_childhint
+#define c_dirhintcnt c_union.cu_dirhintcnt
+#define c_syslockcount c_union.cu_syslockcount
+
+
+/* hash maintenance flags kept in c_hflag and protected by hfs_chash_mutex */
+#define H_ALLOC 0x00001 /* CNode is being allocated */
+#define H_ATTACH 0x00002 /* CNode is being attached to by another vnode */
+#define H_TRANSIT 0x00004 /* CNode is getting recycled */
+#define H_WAITING 0x00008 /* CNode is being waited for */
+
/* Runtime cnode flags (kept in c_flag) */
-#define C_ACCESS 0x0001 /* Access time update request */
-#define C_CHANGE 0x0002 /* Change time update request */
-#define C_UPDATE 0x0004 /* Modification time update request */
-#define C_MODIFIED 0x0008 /* CNode has been modified */
-#define C_ATIMEMOD 0x0010 /* Access time has been modified */
+#define C_NEED_RVNODE_PUT 0x00001 /* Need to do a vnode_put on c_rsrc_vp after the unlock */
+#define C_NEED_DVNODE_PUT 0x00002 /* Need to do a vnode_put on c_vp after the unlock */
+#define C_ZFWANTSYNC 0x00004 /* fsync requested and file has holes */
+#define C_FROMSYNC 0x00008 /* fsync was called from sync */
-#define C_NOEXISTS 0x0020 /* CNode has been deleted, catalog entry is gone */
-#define C_DELETED 0x0040 /* CNode has been marked to be deleted */
-#define C_HARDLINK 0x0080 /* CNode is a hard link */
+#define C_MODIFIED 0x00010 /* CNode has been modified */
+#define C_NOEXISTS 0x00020 /* CNode has been deleted, catalog entry is gone */
+#define C_DELETED 0x00040 /* CNode has been marked to be deleted */
+#define C_HARDLINK 0x00080 /* CNode is a hard link */
-#define C_ALLOC 0x0100 /* CNode is being allocated */
-#define C_WALLOC 0x0200 /* Waiting for allocation to finish */
-#define C_TRANSIT 0x0400 /* CNode is getting recycled */
-#define C_WTRANSIT 0x0800 /* Waiting for cnode getting recycled */
+#define C_FORCEUPDATE 0x00100 /* force the catalog entry update */
+#define C_HASXATTRS 0x00200 /* cnode has extended attributes */
-#define C_RENAME 0x1000 /* CNode is being renamed */
-#define C_ZFWANTSYNC 0x2000 /* fsync requested and file has holes */
+#define C_NEED_DATA_SETSIZE 0x01000 /* Do a ubc_setsize(0) on c_rsrc_vp after the unlock */
+#define C_NEED_RSRC_SETSIZE 0x02000 /* Do a ubc_setsize(0) on c_vp after the unlock */
#define ZFTIMELIMIT (5 * 60)
/*
* Convert between cnode pointers and vnode pointers
*/
-#define VTOC(vp) ((struct cnode *)(vp)->v_data)
+#define VTOC(vp) ((struct cnode *)vnode_fsnode((vp)))
#define CTOV(cp,rsrc) (((rsrc) && S_ISREG((cp)->c_mode)) ? \
(cp)->c_rsrc_vp : (cp)->c_vp)
FTOC(fp)->c_rsrc_vp : \
FTOC(fp)->c_vp)
+
/*
* Test for a resource fork
*/
#define VNODE_IS_RSRC(vp) ((vp) == VTOC((vp))->c_rsrc_vp)
-/*
- * CTIMES should be an inline function...
- */
-#define C_TIMEMASK (C_ACCESS | C_CHANGE | C_UPDATE)
-
-#define ATIME_ACCURACY 60
-
-#define CTIMES(cp, t1, t2) { \
- if ((cp)->c_flag & C_TIMEMASK) { \
- /* \
- * If only the access time is changing then defer \
- * updating it on-disk util later (in hfs_inactive). \
- * If it was recently updated then skip the update. \
- */ \
- if (((cp)->c_flag & (C_TIMEMASK | C_MODIFIED)) == C_ACCESS) { \
- if (((cp)->c_flag & C_ATIMEMOD) || \
- (t1)->tv_sec > ((cp)->c_atime + ATIME_ACCURACY)) { \
- (cp)->c_atime = (t1)->tv_sec; \
- (cp)->c_flag |= C_ATIMEMOD; \
- } \
- (cp)->c_flag &= ~C_ACCESS; \
- } else { \
- if ((cp)->c_flag & C_ACCESS) { \
- (cp)->c_atime = (t1)->tv_sec; \
- } \
- if ((cp)->c_flag & C_UPDATE) { \
- (cp)->c_mtime = (t2)->tv_sec; \
- (cp)->c_mtime_nsec = (t2)->tv_usec * 1000; \
- } \
- if ((cp)->c_flag & C_CHANGE) { \
- (cp)->c_ctime = time.tv_sec; \
- } \
- (cp)->c_flag |= C_MODIFIED; \
- (cp)->c_flag &= ~C_TIMEMASK; \
- } \
- } \
-}
-
-/* This overlays the fid structure (see mount.h). */
+#define ATIME_ONDISK_ACCURACY 300
+
+
+/* This overlays the FileID portion of NFS file handles. */
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). */
};
+extern void hfs_touchtimes(struct hfsmount *, struct cnode *);
+
/*
* HFS cnode hash functions.
*/
extern void hfs_chashinit(void);
extern void hfs_chashinsert(struct cnode *cp);
-extern void hfs_chashremove(struct cnode *cp);
-extern struct cnode * hfs_chashget(dev_t dev, ino_t inum, int wantrsrc,
- struct vnode **vpp, struct vnode **rvpp);
+extern int hfs_chashremove(struct cnode *cp);
+extern void hfs_chash_abort(struct cnode *cp);
+extern void hfs_chash_rehash(struct cnode *cp1, struct cnode *cp2);
+extern void hfs_chashwakeup(struct cnode *cp, int flags);
+extern void hfs_chash_mark_in_transit(struct cnode *cp);
+
+extern struct vnode * hfs_chash_getvnode(dev_t dev, ino_t inum, int wantrsrc, int skiplock);
+extern struct cnode * hfs_chash_getcnode(dev_t dev, ino_t inum, struct vnode **vpp, int wantrsrc, int skiplock);
+extern int hfs_chash_snoop(dev_t, ino_t, int (*)(const struct cat_desc *,
+ const struct cat_attr *, void *), void *);
+
+/*
+ * HFS directory hint functions.
+ */
+extern directoryhint_t * hfs_getdirhint(struct cnode *, int);
+extern void hfs_reldirhint(struct cnode *, directoryhint_t *);
+extern void hfs_reldirhints(struct cnode *, int);
+
+/*
+ * HFS cnode lock functions.
+ *
+ * HFS Locking Order:
+ *
+ * 1. cnode truncate lock (if needed)
+ * 2. cnode lock (in parent-child order if related, otherwise by address order)
+ * 3. journal (if needed)
+ * 4. system files (as needed)
+ * A. Catalog B-tree file
+ * B. Attributes B-tree file
+ * C. Allocation Bitmap file (always exclusive, supports recursion)
+ * D. Overflow Extents B-tree file (always exclusive, supports recursion)
+ * 5. hfs mount point (always last)
+ *
+ */
+enum hfslocktype {HFS_SHARED_LOCK = 1, HFS_EXCLUSIVE_LOCK = 2, HFS_FORCE_LOCK = 3};
+#define HFS_SHARED_OWNER (void *)0xffffffff
+
+extern int hfs_lock(struct cnode *, enum hfslocktype);
+extern int hfs_lockpair(struct cnode *, struct cnode *, enum hfslocktype);
+extern int hfs_lockfour(struct cnode *, struct cnode *, struct cnode *, struct cnode *,
+ enum hfslocktype);
+
+extern void hfs_unlock(struct cnode *);
+extern void hfs_unlockpair(struct cnode *, struct cnode *);
+extern void hfs_unlockfour(struct cnode *, struct cnode *, struct cnode *, struct cnode *);
+
+extern void hfs_lock_truncate(struct cnode *, int);
+extern void hfs_unlock_truncate(struct cnode *);
#endif /* __APPLE_API_PRIVATE */
#endif /* KERNEL */
projects / apple / xnu.git / blobdiff