blob: 237e7f6f2ab31ef80456b7a2c60b3080f076c69c [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_INODE_H__
19#define __XFS_INODE_H__
20
Christoph Hellwigef14f0c2009-06-10 17:07:47 +020021struct posix_acl;
Christoph Hellwig347d1c02007-08-28 13:57:51 +100022struct xfs_dinode;
Barry Naujok847fff52008-10-30 17:05:38 +110023struct xfs_inode;
Christoph Hellwig347d1c02007-08-28 13:57:51 +100024
Linus Torvalds1da177e2005-04-16 15:20:36 -070025/*
Nathan Scotta844f452005-11-02 14:38:42 +110026 * Fork identifiers.
27 */
28#define XFS_DATA_FORK 0
29#define XFS_ATTR_FORK 1
30
31/*
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +110032 * The following xfs_ext_irec_t struct introduces a second (top) level
33 * to the in-core extent allocation scheme. These structs are allocated
34 * in a contiguous block, creating an indirection array where each entry
35 * (irec) contains a pointer to a buffer of in-core extent records which
36 * it manages. Each extent buffer is 4k in size, since 4k is the system
37 * page size on Linux i386 and systems with larger page sizes don't seem
38 * to gain much, if anything, by using their native page size as the
39 * extent buffer size. Also, using 4k extent buffers everywhere provides
40 * a consistent interface for CXFS across different platforms.
41 *
42 * There is currently no limit on the number of irec's (extent lists)
43 * allowed, so heavily fragmented files may require an indirection array
44 * which spans multiple system pages of memory. The number of extents
45 * which would require this amount of contiguous memory is very large
46 * and should not cause problems in the foreseeable future. However,
47 * if the memory needed for the contiguous array ever becomes a problem,
48 * it is possible that a third level of indirection may be required.
49 */
50typedef struct xfs_ext_irec {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +100051 xfs_bmbt_rec_host_t *er_extbuf; /* block of extent records */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +110052 xfs_extnum_t er_extoff; /* extent offset in file */
53 xfs_extnum_t er_extcount; /* number of extents in page/block */
54} xfs_ext_irec_t;
55
56/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 * File incore extent information, present for each of data & attr forks.
58 */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +110059#define XFS_IEXT_BUFSZ 4096
60#define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
61#define XFS_INLINE_EXTS 2
62#define XFS_INLINE_DATA 32
Linus Torvalds1da177e2005-04-16 15:20:36 -070063typedef struct xfs_ifork {
64 int if_bytes; /* bytes in if_u1 */
65 int if_real_bytes; /* bytes allocated in if_u1 */
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110066 struct xfs_btree_block *if_broot; /* file's incore btree root */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 short if_broot_bytes; /* bytes allocated for root */
68 unsigned char if_flags; /* per-fork flags */
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 union {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +100070 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +110071 xfs_ext_irec_t *if_ext_irec; /* irec map file exts */
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 char *if_data; /* inline file data */
73 } if_u1;
74 union {
Christoph Hellwiga6f64d42007-08-16 16:23:40 +100075 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 /* very small file extents */
77 char if_inline_data[XFS_INLINE_DATA];
78 /* very small file data */
79 xfs_dev_t if_rdev; /* dev number if special */
80 uuid_t if_uuid; /* mount point value */
81 } if_u2;
82} xfs_ifork_t;
83
84/*
Christoph Hellwig92bfc6e2008-11-28 14:23:41 +110085 * Inode location information. Stored in the inode and passed to
86 * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
87 */
88struct xfs_imap {
89 xfs_daddr_t im_blkno; /* starting BB of inode chunk */
90 ushort im_len; /* length in BBs of inode chunk */
91 ushort im_boffset; /* inode offset in block in bytes */
92};
93
94/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 * This is the xfs in-core inode structure.
96 * Most of the on-disk inode is embedded in the i_d field.
97 *
98 * The extent pointers/inline file space, however, are managed
99 * separately. The memory for this information is pointed to by
100 * the if_u1 unions depending on the type of the data.
101 * This is used to linearize the array of extents for fast in-core
102 * access. This is used until the file's number of extents
103 * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
104 * are accessed through the buffer cache.
105 *
106 * Other state kept in the in-core inode is used for identification,
107 * locking, transactional updating, etc of the inode.
108 *
109 * Generally, we do not want to hold the i_rlock while holding the
110 * i_ilock. Hierarchy is i_iolock followed by i_rlock.
111 *
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300112 * xfs_iptr_t contains all the inode fields up to and including the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 * i_mnext and i_mprev fields, it is used as a marker in the inode
114 * chain off the mount structure by xfs_sync calls.
115 */
116
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000117typedef struct xfs_ictimestamp {
118 __int32_t t_sec; /* timestamp seconds */
119 __int32_t t_nsec; /* timestamp nanoseconds */
120} xfs_ictimestamp_t;
121
122/*
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100123 * NOTE: This structure must be kept identical to struct xfs_dinode
Malcolm Parsons9da096f2009-03-29 09:55:42 +0200124 * in xfs_dinode.h except for the endianness annotations.
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000125 */
126typedef struct xfs_icdinode {
127 __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
128 __uint16_t di_mode; /* mode and type of file */
129 __int8_t di_version; /* inode version */
130 __int8_t di_format; /* format of di_c data */
131 __uint16_t di_onlink; /* old number of links to file */
132 __uint32_t di_uid; /* owner's user id */
133 __uint32_t di_gid; /* owner's group id */
134 __uint32_t di_nlink; /* number of links to file */
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000135 __uint16_t di_projid_lo; /* lower part of owner's project id */
136 __uint16_t di_projid_hi; /* higher part of owner's project id */
137 __uint8_t di_pad[6]; /* unused, zeroed space */
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000138 __uint16_t di_flushiter; /* incremented on flush */
139 xfs_ictimestamp_t di_atime; /* time last accessed */
140 xfs_ictimestamp_t di_mtime; /* time last modified */
141 xfs_ictimestamp_t di_ctime; /* time created/inode modified */
142 xfs_fsize_t di_size; /* number of bytes in file */
143 xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */
144 xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
145 xfs_extnum_t di_nextents; /* number of extents in data fork */
146 xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/
147 __uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
148 __int8_t di_aformat; /* format of attr fork's data */
149 __uint32_t di_dmevmask; /* DMIG event mask */
150 __uint16_t di_dmstate; /* DMIG state info */
151 __uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
152 __uint32_t di_gen; /* generation number */
153} xfs_icdinode_t;
154
Barry Naujok847fff52008-10-30 17:05:38 +1100155/*
156 * Flags for xfs_ichgtime().
157 */
158#define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */
159#define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */
160
161/*
162 * Per-fork incore inode flags.
163 */
164#define XFS_IFINLINE 0x01 /* Inline data is read in */
165#define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */
166#define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */
167#define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */
168
169/*
Barry Naujok847fff52008-10-30 17:05:38 +1100170 * Fork handling.
171 */
172
173#define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0)
174#define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3))
175
176#define XFS_IFORK_PTR(ip,w) \
177 ((w) == XFS_DATA_FORK ? \
178 &(ip)->i_df : \
179 (ip)->i_afp)
180#define XFS_IFORK_DSIZE(ip) \
181 (XFS_IFORK_Q(ip) ? \
182 XFS_IFORK_BOFF(ip) : \
183 XFS_LITINO((ip)->i_mount))
184#define XFS_IFORK_ASIZE(ip) \
185 (XFS_IFORK_Q(ip) ? \
186 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
187 0)
188#define XFS_IFORK_SIZE(ip,w) \
189 ((w) == XFS_DATA_FORK ? \
190 XFS_IFORK_DSIZE(ip) : \
191 XFS_IFORK_ASIZE(ip))
192#define XFS_IFORK_FORMAT(ip,w) \
193 ((w) == XFS_DATA_FORK ? \
194 (ip)->i_d.di_format : \
195 (ip)->i_d.di_aformat)
196#define XFS_IFORK_FMT_SET(ip,w,n) \
197 ((w) == XFS_DATA_FORK ? \
198 ((ip)->i_d.di_format = (n)) : \
199 ((ip)->i_d.di_aformat = (n)))
200#define XFS_IFORK_NEXTENTS(ip,w) \
201 ((w) == XFS_DATA_FORK ? \
202 (ip)->i_d.di_nextents : \
203 (ip)->i_d.di_anextents)
204#define XFS_IFORK_NEXT_SET(ip,w,n) \
205 ((w) == XFS_DATA_FORK ? \
206 ((ip)->i_d.di_nextents = (n)) : \
207 ((ip)->i_d.di_anextents = (n)))
Christoph Hellwig8096b1e2011-12-18 20:00:07 +0000208#define XFS_IFORK_MAXEXT(ip, w) \
209 (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t))
Barry Naujok847fff52008-10-30 17:05:38 +1100210
211
212#ifdef __KERNEL__
213
Barry Naujok847fff52008-10-30 17:05:38 +1100214struct xfs_buf;
215struct xfs_bmap_free;
216struct xfs_bmbt_irec;
Barry Naujok847fff52008-10-30 17:05:38 +1100217struct xfs_inode_log_item;
218struct xfs_mount;
219struct xfs_trans;
220struct xfs_dquot;
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222typedef struct xfs_inode {
223 /* Inode linking and identification information. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 struct xfs_mount *i_mount; /* fs mount struct ptr */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700225 struct xfs_dquot *i_udquot; /* user dquot */
226 struct xfs_dquot *i_gdquot; /* group dquot */
227
228 /* Inode location stuff */
229 xfs_ino_t i_ino; /* inode number (agno/agino)*/
Christoph Hellwig92bfc6e2008-11-28 14:23:41 +1100230 struct xfs_imap i_imap; /* location for xfs_imap() */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
232 /* Extent information. */
233 xfs_ifork_t *i_afp; /* attribute fork pointer */
234 xfs_ifork_t i_df; /* data fork */
235
236 /* Transaction and locking information. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 struct xfs_inode_log_item *i_itemp; /* logging information */
238 mrlock_t i_lock; /* inode lock */
239 mrlock_t i_iolock; /* inode IO lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 atomic_t i_pincount; /* inode pin count */
David Chinnerf273ab82006-09-28 11:06:03 +1000241 spinlock_t i_flags_lock; /* inode i_flags lock */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 /* Miscellaneous state. */
Christoph Hellwig49e4c702011-12-18 20:00:08 +0000243 unsigned long i_flags; /* see defined flags below */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 unsigned int i_delayed_blks; /* count of delay alloc blks */
245
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000246 xfs_icdinode_t i_d; /* most of ondisk inode */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247
David Chinnerbf904242008-10-30 17:36:14 +1100248 /* VFS inode */
249 struct inode i_vnode; /* embedded VFS inode */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250} xfs_inode_t;
251
David Chinner01651642008-08-13 15:45:15 +1000252/* Convert from vfs inode to xfs inode */
253static inline struct xfs_inode *XFS_I(struct inode *inode)
254{
David Chinnerbf904242008-10-30 17:36:14 +1100255 return container_of(inode, struct xfs_inode, i_vnode);
David Chinner01651642008-08-13 15:45:15 +1000256}
257
David Chinner01651642008-08-13 15:45:15 +1000258/* convert from xfs inode to vfs inode */
259static inline struct inode *VFS_I(struct xfs_inode *ip)
260{
David Chinnerbf904242008-10-30 17:36:14 +1100261 return &ip->i_vnode;
David Chinner01651642008-08-13 15:45:15 +1000262}
David Chinner01651642008-08-13 15:45:15 +1000263
David Chinner7a18c382006-11-11 18:04:54 +1100264/*
Christoph Hellwigce7ae1512011-12-18 20:00:11 +0000265 * For regular files we only update the on-disk filesize when actually
266 * writing data back to disk. Until then only the copy in the VFS inode
267 * is uptodate.
268 */
269static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
270{
271 if (S_ISREG(ip->i_d.di_mode))
272 return i_size_read(VFS_I(ip));
273 return ip->i_d.di_size;
274}
275
276/*
Christoph Hellwig6923e682012-02-29 09:53:49 +0000277 * If this I/O goes past the on-disk inode size update it unless it would
278 * be past the current in-core inode size.
279 */
280static inline xfs_fsize_t
281xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
282{
283 xfs_fsize_t i_size = i_size_read(VFS_I(ip));
284
285 if (new_size > i_size)
286 new_size = i_size;
287 return new_size > ip->i_d.di_size ? new_size : 0;
288}
289
290/*
David Chinner7a18c382006-11-11 18:04:54 +1100291 * i_flags helper functions
292 */
293static inline void
294__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
295{
296 ip->i_flags |= flags;
297}
298
299static inline void
300xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
301{
302 spin_lock(&ip->i_flags_lock);
303 __xfs_iflags_set(ip, flags);
304 spin_unlock(&ip->i_flags_lock);
305}
306
307static inline void
308xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
309{
310 spin_lock(&ip->i_flags_lock);
311 ip->i_flags &= ~flags;
312 spin_unlock(&ip->i_flags_lock);
313}
314
315static inline int
316__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
317{
318 return (ip->i_flags & flags);
319}
320
321static inline int
322xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
323{
324 int ret;
325 spin_lock(&ip->i_flags_lock);
326 ret = __xfs_iflags_test(ip, flags);
327 spin_unlock(&ip->i_flags_lock);
328 return ret;
329}
Christoph Hellwig09262b42007-08-29 11:44:50 +1000330
331static inline int
332xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
333{
334 int ret;
335
336 spin_lock(&ip->i_flags_lock);
337 ret = ip->i_flags & flags;
338 if (ret)
339 ip->i_flags &= ~flags;
340 spin_unlock(&ip->i_flags_lock);
341 return ret;
342}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Christoph Hellwig474fce02011-12-18 20:00:09 +0000344static inline int
345xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
346{
347 int ret;
348
349 spin_lock(&ip->i_flags_lock);
350 ret = ip->i_flags & flags;
351 if (!ret)
352 ip->i_flags |= flags;
353 spin_unlock(&ip->i_flags_lock);
354 return ret;
355}
356
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357/*
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000358 * Project quota id helpers (previously projid was 16bit only
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300359 * and using two 16bit values to hold new 32bit projid was chosen
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000360 * to retain compatibility with "old" filesystems).
361 */
362static inline prid_t
363xfs_get_projid(struct xfs_inode *ip)
364{
365 return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
366}
367
368static inline void
369xfs_set_projid(struct xfs_inode *ip,
370 prid_t projid)
371{
372 ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
373 ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
374}
375
376/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 * In-core inode flags.
378 */
Christoph Hellwig474fce02011-12-18 20:00:09 +0000379#define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
380#define XFS_ISTALE (1 << 1) /* inode has been staled */
381#define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
382#define XFS_INEW (1 << 3) /* inode has just been allocated */
383#define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */
384#define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
385#define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
386#define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */
387#define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT)
Christoph Hellwigf392e632011-12-18 20:00:10 +0000388#define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
389#define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
Dave Chinner5132ba82012-03-22 05:15:10 +0000390#define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392/*
Dave Chinner778e24b2011-06-23 01:34:59 +0000393 * Per-lifetime flags need to be reset when re-using a reclaimable inode during
Dave Chinner5132ba82012-03-22 05:15:10 +0000394 * inode lookup. This prevents unintended behaviour on the new inode from
Dave Chinner778e24b2011-06-23 01:34:59 +0000395 * ocurring.
396 */
397#define XFS_IRECLAIM_RESET_FLAGS \
398 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
399 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
400 XFS_IFILESTREAM);
401
402/*
Christoph Hellwig474fce02011-12-18 20:00:09 +0000403 * Synchronize processes attempting to flush the in-core inode back to disk.
404 */
405
406extern void __xfs_iflock(struct xfs_inode *ip);
407
408static inline int xfs_iflock_nowait(struct xfs_inode *ip)
409{
410 return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
411}
412
413static inline void xfs_iflock(struct xfs_inode *ip)
414{
415 if (!xfs_iflock_nowait(ip))
416 __xfs_iflock(ip);
417}
418
419static inline void xfs_ifunlock(struct xfs_inode *ip)
420{
421 xfs_iflags_clear(ip, XFS_IFLOCK);
Alex Elder311f08a2013-02-04 10:13:11 -0600422 smp_mb();
Christoph Hellwig474fce02011-12-18 20:00:09 +0000423 wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
424}
425
426static inline int xfs_isiflocked(struct xfs_inode *ip)
427{
428 return xfs_iflags_test(ip, XFS_IFLOCK);
429}
430
431/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 * Flags for inode locking.
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000433 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
434 * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 */
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000436#define XFS_IOLOCK_EXCL (1<<0)
437#define XFS_IOLOCK_SHARED (1<<1)
438#define XFS_ILOCK_EXCL (1<<2)
439#define XFS_ILOCK_SHARED (1<<3)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000441#define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000442 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000443
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000444#define XFS_LOCK_FLAGS \
445 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
446 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
447 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
Christoph Hellwig5b03ff12012-02-20 02:31:22 +0000448 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000449
450
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000451/*
452 * Flags for lockdep annotations.
453 *
Christoph Hellwig96811532011-01-25 09:06:21 +0000454 * XFS_LOCK_PARENT - for directory operations that require locking a
455 * parent directory inode and a child entry inode. The parent gets locked
456 * with this flag so it gets a lockdep subclass of 1 and the child entry
457 * lock will have a lockdep subclass of 0.
458 *
459 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
460 * inodes do not participate in the normal lock order, and thus have their
461 * own subclasses.
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000462 *
David Chinner0f1145c2007-06-29 17:26:09 +1000463 * XFS_LOCK_INUMORDER - for locking several inodes at the some time
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000464 * with xfs_lock_inodes(). This flag is used as the starting subclass
465 * and each subsequent lock acquired will increment the subclass by one.
Christoph Hellwig96811532011-01-25 09:06:21 +0000466 * So the first lock acquired will have a lockdep subclass of 4, the
467 * second lock will have a lockdep subclass of 5, and so on. It is
David Chinner0f1145c2007-06-29 17:26:09 +1000468 * the responsibility of the class builder to shift this to the correct
469 * portion of the lock_mode lockdep mask.
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000470 */
David Chinner0f1145c2007-06-29 17:26:09 +1000471#define XFS_LOCK_PARENT 1
Christoph Hellwig96811532011-01-25 09:06:21 +0000472#define XFS_LOCK_RTBITMAP 2
473#define XFS_LOCK_RTSUM 3
474#define XFS_LOCK_INUMORDER 4
David Chinner0f1145c2007-06-29 17:26:09 +1000475
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000476#define XFS_IOLOCK_SHIFT 16
David Chinner0f1145c2007-06-29 17:26:09 +1000477#define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000478
479#define XFS_ILOCK_SHIFT 24
David Chinner0f1145c2007-06-29 17:26:09 +1000480#define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
Christoph Hellwig96811532011-01-25 09:06:21 +0000481#define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
482#define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
Lachlan McIlroyf7c66ce2007-05-08 13:50:19 +1000483
484#define XFS_IOLOCK_DEP_MASK 0x00ff0000
485#define XFS_ILOCK_DEP_MASK 0xff000000
486#define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
487
488#define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
489#define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
491/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 * For multiple groups support: if S_ISGID bit is set in the parent
493 * directory, group of new file is set to that of the parent, and
494 * new subdirectory gets S_ISGID bit from parent.
495 */
Christoph Hellwigbd186aa2007-08-30 17:21:12 +1000496#define XFS_INHERIT_GID(pip) \
497 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
498 ((pip)->i_d.di_mode & S_ISGID))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499
Dave Chinner33479e02012-10-08 21:56:11 +1100500
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501/*
Dave Chinner33479e02012-10-08 21:56:11 +1100502 * xfs_inode.c prototypes.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504void xfs_ilock(xfs_inode_t *, uint);
505int xfs_ilock_nowait(xfs_inode_t *, uint);
506void xfs_iunlock(xfs_inode_t *, uint);
507void xfs_ilock_demote(xfs_inode_t *, uint);
Christoph Hellwig579aa9c2008-04-22 17:34:00 +1000508int xfs_isilocked(xfs_inode_t *, uint);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509uint xfs_ilock_map_shared(xfs_inode_t *);
510void xfs_iunlock_map_shared(xfs_inode_t *, uint);
Al Viro576b1d62011-07-26 02:50:15 -0400511int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
Arkadiusz Mi?kiewicz67430992010-09-26 06:10:18 +0000512 xfs_nlink_t, xfs_dev_t, prid_t, int,
Christoph Hellwig08358902012-07-04 10:54:47 -0400513 struct xfs_buf **, xfs_inode_t **);
Christoph Hellwig347d1c02007-08-28 13:57:51 +1000514
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515uint xfs_ip2xflags(struct xfs_inode *);
Christoph Hellwig45ba5982007-12-07 14:07:20 +1100516uint xfs_dic2xflags(struct xfs_dinode *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
518 struct xfs_bmap_free *);
Christoph Hellwig8f04c472011-07-08 14:34:34 +0200519int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
520 int, xfs_fsize_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523void xfs_iext_realloc(xfs_inode_t *, int, int);
Dave Chinner777df5a2010-02-06 12:37:26 +1100524void xfs_iunpin_wait(xfs_inode_t *);
Christoph Hellwig4c468192012-04-23 15:58:36 +1000525int xfs_iflush(struct xfs_inode *, struct xfs_buf **);
Christoph Hellwigcfa853e2008-04-22 17:34:06 +1000526void xfs_lock_inodes(xfs_inode_t **, int, uint);
Christoph Hellwige1cccd92008-08-13 16:18:07 +1000527void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528
Dave Chinner2a0ec1d2012-04-23 15:59:02 +1000529xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
530
Christoph Hellwig5a8d0f32008-12-03 12:20:40 +0100531#define IHOLD(ip) \
532do { \
533 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
Al Viro7de9c6ee2010-10-23 11:11:40 -0400534 ihold(VFS_I(ip)); \
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000535 trace_xfs_ihold(ip, _THIS_IP_); \
Christoph Hellwig5a8d0f32008-12-03 12:20:40 +0100536} while (0)
537
538#define IRELE(ip) \
539do { \
Christoph Hellwig0b1b2132009-12-14 23:14:59 +0000540 trace_xfs_irele(ip, _THIS_IP_); \
Christoph Hellwig5a8d0f32008-12-03 12:20:40 +0100541 iput(VFS_I(ip)); \
542} while (0)
543
Barry Naujok847fff52008-10-30 17:05:38 +1100544#endif /* __KERNEL__ */
545
Christoph Hellwig6d73cf12008-12-09 04:47:32 -0500546/*
547 * Flags for xfs_iget()
548 */
549#define XFS_IGET_CREATE 0x1
Dave Chinner19207792010-06-24 11:15:47 +1000550#define XFS_IGET_UNTRUSTED 0x2
Dave Chinner5132ba82012-03-22 05:15:10 +0000551#define XFS_IGET_DONTCACHE 0x4
Christoph Hellwig6d73cf12008-12-09 04:47:32 -0500552
Christoph Hellwig475ee412012-07-03 12:21:22 -0400553int xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
554 struct xfs_imap *, struct xfs_dinode **,
555 struct xfs_buf **, uint, uint);
Christoph Hellwig6d73cf12008-12-09 04:47:32 -0500556int xfs_iread(struct xfs_mount *, struct xfs_trans *,
Dave Chinner7b6259e2010-06-24 11:35:17 +1000557 struct xfs_inode *, uint);
Christoph Hellwig81591fe2008-11-28 14:23:39 +1100558void xfs_dinode_to_disk(struct xfs_dinode *,
Barry Naujok847fff52008-10-30 17:05:38 +1100559 struct xfs_icdinode *);
560void xfs_idestroy_fork(struct xfs_inode *, int);
561void xfs_idata_realloc(struct xfs_inode *, int, int);
562void xfs_iroot_realloc(struct xfs_inode *, int, int);
563int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
564int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
565
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000566xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
Christoph Hellwig6ef35542009-11-25 00:00:21 +0000567void xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t,
568 xfs_bmbt_irec_t *, int);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100569void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +1100570void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
Christoph Hellwig6ef35542009-11-25 00:00:21 +0000571void xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100572void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
573void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +1100574void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100575void xfs_iext_realloc_direct(xfs_ifork_t *, int);
576void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
577void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
578void xfs_iext_destroy(xfs_ifork_t *);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000579xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
Mandy Kirkconnell0293ce32006-03-14 13:30:23 +1100580xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
581xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
582void xfs_iext_irec_init(xfs_ifork_t *);
583xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
584void xfs_iext_irec_remove(xfs_ifork_t *, int);
585void xfs_iext_irec_compact(xfs_ifork_t *);
586void xfs_iext_irec_compact_pages(xfs_ifork_t *);
587void xfs_iext_irec_compact_full(xfs_ifork_t *);
588void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
Brian Foster72b53ef2012-11-06 09:50:40 -0500589bool xfs_can_free_eofblocks(struct xfs_inode *, bool);
Mandy Kirkconnell4eea22f2006-03-14 13:29:52 +1100590
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
592
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593#if defined(DEBUG)
594void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
595#else
596#define xfs_inobp_check(mp, bp)
597#endif /* DEBUG */
598
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599extern struct kmem_zone *xfs_ifork_zone;
600extern struct kmem_zone *xfs_inode_zone;
601extern struct kmem_zone *xfs_ili_zone;
Dave Chinner1813dd62012-11-14 17:54:40 +1100602extern const struct xfs_buf_ops xfs_inode_buf_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604#endif /* __XFS_INODE_H__ */