Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * 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. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * 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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_MOUNT_H__ | |
19 | #define __XFS_MOUNT_H__ | |
20 | ||
7fd36c44 | 21 | #ifdef __KERNEL__ |
847fff5c | 22 | |
ad223e60 | 23 | struct xlog; |
1da177e4 | 24 | struct xfs_inode; |
2a82b8be | 25 | struct xfs_mru_cache; |
5163f95a | 26 | struct xfs_nameops; |
82fa9012 | 27 | struct xfs_ail; |
7d095257 | 28 | struct xfs_quotainfo; |
32c5483a | 29 | struct xfs_dir_ops; |
0650b554 | 30 | struct xfs_da_geometry; |
7d095257 | 31 | |
8d280b98 DC |
32 | #ifdef HAVE_PERCPU_SB |
33 | ||
34 | /* | |
35 | * Valid per-cpu incore superblock counters. Note that if you add new counters, | |
36 | * you may need to define new counter disabled bit field descriptors as there | |
37 | * are more possible fields in the superblock that can fit in a bitfield on a | |
38 | * 32 bit platform. The XFS_SBS_* values for the current current counters just | |
39 | * fit. | |
40 | */ | |
41 | typedef struct xfs_icsb_cnts { | |
42 | uint64_t icsb_fdblocks; | |
43 | uint64_t icsb_ifree; | |
44 | uint64_t icsb_icount; | |
01e1b69c | 45 | unsigned long icsb_flags; |
8d280b98 DC |
46 | } xfs_icsb_cnts_t; |
47 | ||
01e1b69c DC |
48 | #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ |
49 | ||
8d280b98 DC |
50 | #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ |
51 | ||
52 | extern int xfs_icsb_init_counters(struct xfs_mount *); | |
5478eead | 53 | extern void xfs_icsb_reinit_counters(struct xfs_mount *); |
c962fb79 | 54 | extern void xfs_icsb_destroy_counters(struct xfs_mount *); |
d4d90b57 CH |
55 | extern void xfs_icsb_sync_counters(struct xfs_mount *, int); |
56 | extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); | |
96540c78 CH |
57 | extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, |
58 | int64_t, int); | |
8d280b98 DC |
59 | |
60 | #else | |
c962fb79 CH |
61 | #define xfs_icsb_init_counters(mp) (0) |
62 | #define xfs_icsb_destroy_counters(mp) do { } while (0) | |
63 | #define xfs_icsb_reinit_counters(mp) do { } while (0) | |
d4d90b57 | 64 | #define xfs_icsb_sync_counters(mp, flags) do { } while (0) |
7155054c | 65 | #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) |
96540c78 CH |
66 | #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ |
67 | xfs_mod_incore_sb(mp, field, delta, rsvd) | |
8d280b98 | 68 | #endif |
1da177e4 | 69 | |
055388a3 DC |
70 | /* dynamic preallocation free space thresholds, 5% down to 1% */ |
71 | enum { | |
72 | XFS_LOWSP_1_PCNT = 0, | |
73 | XFS_LOWSP_2_PCNT, | |
74 | XFS_LOWSP_3_PCNT, | |
75 | XFS_LOWSP_4_PCNT, | |
76 | XFS_LOWSP_5_PCNT, | |
77 | XFS_LOWSP_MAX, | |
78 | }; | |
79 | ||
1da177e4 | 80 | typedef struct xfs_mount { |
b267ce99 | 81 | struct super_block *m_super; |
1da177e4 | 82 | xfs_tid_t m_tid; /* next unused tid for fs */ |
82fa9012 | 83 | struct xfs_ail *m_ail; /* fs active log item list */ |
1da177e4 | 84 | xfs_sb_t m_sb; /* copy of fs superblock */ |
3685c2a1 | 85 | spinlock_t m_sb_lock; /* sb counter lock */ |
1da177e4 LT |
86 | struct xfs_buf *m_sb_bp; /* buffer for superblock */ |
87 | char *m_fsname; /* filesystem name */ | |
88 | int m_fsname_len; /* strlen of fs name */ | |
fc1f8c1c NS |
89 | char *m_rtname; /* realtime device name */ |
90 | char *m_logname; /* external log device name */ | |
1da177e4 LT |
91 | int m_bsize; /* fs logical block size */ |
92 | xfs_agnumber_t m_agfrotor; /* last ag where space found */ | |
93 | xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ | |
36e41eeb | 94 | spinlock_t m_agirotor_lock;/* .. and lock protecting it */ |
1da177e4 | 95 | xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
1da177e4 LT |
96 | uint m_readio_log; /* min read size log bytes */ |
97 | uint m_readio_blocks; /* min read size blocks */ | |
98 | uint m_writeio_log; /* min write size log bytes */ | |
99 | uint m_writeio_blocks; /* min write size blocks */ | |
0650b554 DC |
100 | struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ |
101 | struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ | |
ad223e60 | 102 | struct xlog *m_log; /* log specific stuff */ |
1da177e4 LT |
103 | int m_logbufs; /* number of log buffers */ |
104 | int m_logbsize; /* size of each log buffer */ | |
105 | uint m_rsumlevels; /* rt summary levels */ | |
106 | uint m_rsumsize; /* size of rt summary, bytes */ | |
107 | struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ | |
108 | struct xfs_inode *m_rsumip; /* pointer to summary inode */ | |
109 | struct xfs_inode *m_rootip; /* pointer to root directory */ | |
110 | struct xfs_quotainfo *m_quotainfo; /* disk quota information */ | |
111 | xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ | |
112 | xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ | |
113 | xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ | |
1da177e4 LT |
114 | __uint8_t m_blkbit_log; /* blocklog + NBBY */ |
115 | __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ | |
116 | __uint8_t m_agno_log; /* log #ag's */ | |
117 | __uint8_t m_agino_log; /* #bits for agino in inum */ | |
8f80587b | 118 | uint m_inode_cluster_size;/* min inode buf size */ |
1da177e4 LT |
119 | uint m_blockmask; /* sb_blocksize-1 */ |
120 | uint m_blockwsize; /* sb_blocksize in words */ | |
121 | uint m_blockwmask; /* blockwsize-1 */ | |
60197e8d CH |
122 | uint m_alloc_mxr[2]; /* max alloc btree records */ |
123 | uint m_alloc_mnr[2]; /* min alloc btree records */ | |
124 | uint m_bmap_dmxr[2]; /* max bmap btree records */ | |
125 | uint m_bmap_dmnr[2]; /* min bmap btree records */ | |
126 | uint m_inobt_mxr[2]; /* max inobt btree records */ | |
127 | uint m_inobt_mnr[2]; /* min inobt btree records */ | |
1da177e4 LT |
128 | uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
129 | uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ | |
0d87e656 | 130 | uint m_in_maxlevels; /* max inobt btree levels. */ |
1c1c6ebc DC |
131 | struct radix_tree_root m_perag_tree; /* per-ag accounting info */ |
132 | spinlock_t m_perag_lock; /* lock for m_perag_tree */ | |
cc92e7ac | 133 | struct mutex m_growlock; /* growfs mutex */ |
1da177e4 LT |
134 | int m_fixedfsid[2]; /* unchanged for life of FS */ |
135 | uint m_dmevmask; /* DMI events for this FS */ | |
e718eeb4 | 136 | __uint64_t m_flags; /* global mount flags */ |
1da177e4 LT |
137 | int m_ialloc_inos; /* inodes in inode allocation */ |
138 | int m_ialloc_blks; /* blocks in inode allocation */ | |
1da177e4 LT |
139 | int m_inoalign_mask;/* mask sb_inoalignmt if used */ |
140 | uint m_qflags; /* quota status flags */ | |
0eadd102 | 141 | struct xfs_trans_resv m_resv; /* precomputed res values */ |
1da177e4 | 142 | __uint64_t m_maxicount; /* maximum inode count */ |
1da177e4 LT |
143 | __uint64_t m_resblks; /* total reserved blocks */ |
144 | __uint64_t m_resblks_avail;/* available reserved blocks */ | |
cbe132a8 | 145 | __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ |
1da177e4 LT |
146 | int m_dalign; /* stripe unit */ |
147 | int m_swidth; /* stripe width */ | |
c41564b5 | 148 | int m_sinoalign; /* stripe unit inode alignment */ |
1da177e4 | 149 | __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ |
5163f95a | 150 | const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ |
32c5483a | 151 | const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ |
4bceb18f | 152 | const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ |
1da177e4 | 153 | uint m_chsize; /* size of next field */ |
1da177e4 | 154 | atomic_t m_active_trans; /* number trans frozen */ |
8d280b98 | 155 | #ifdef HAVE_PERCPU_SB |
003cb608 | 156 | xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ |
8d280b98 | 157 | unsigned long m_icsb_counters; /* disabled per-cpu counters */ |
e8234a68 | 158 | struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ |
20b64285 | 159 | struct mutex m_icsb_mutex; /* balancer sync lock */ |
8d280b98 | 160 | #endif |
2a82b8be | 161 | struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ |
a7b339f1 | 162 | struct delayed_work m_reclaim_work; /* background inode reclaim */ |
579b62fa BF |
163 | struct delayed_work m_eofblocks_work; /* background eof blocks |
164 | trimming */ | |
7884bc86 CH |
165 | __int64_t m_update_flags; /* sb flags we need to update |
166 | on the next remount,rw */ | |
055388a3 DC |
167 | int64_t m_low_space[XFS_LOWSP_MAX]; |
168 | /* low free space thresholds */ | |
a31b1d3d | 169 | struct xfs_kobj m_kobj; |
aa6bf01d | 170 | |
78c931b8 | 171 | struct workqueue_struct *m_buf_workqueue; |
aa6bf01d CH |
172 | struct workqueue_struct *m_data_workqueue; |
173 | struct workqueue_struct *m_unwritten_workqueue; | |
4c2d542f | 174 | struct workqueue_struct *m_cil_workqueue; |
5889608d DC |
175 | struct workqueue_struct *m_reclaim_workqueue; |
176 | struct workqueue_struct *m_log_workqueue; | |
579b62fa | 177 | struct workqueue_struct *m_eofblocks_workqueue; |
1da177e4 LT |
178 | } xfs_mount_t; |
179 | ||
180 | /* | |
181 | * Flags for m_flags. | |
182 | */ | |
92821e2b | 183 | #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops |
1da177e4 LT |
184 | must be synchronous except |
185 | for space allocations */ | |
92821e2b | 186 | #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) |
e718eeb4 | 187 | #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem |
1da177e4 LT |
188 | operations, typically for |
189 | disk errors in metadata */ | |
e84661aa | 190 | #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ |
e718eeb4 | 191 | #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment |
1da177e4 | 192 | allocations */ |
13059ff0 | 193 | #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ |
bd186aa9 | 194 | #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ |
e718eeb4 | 195 | #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ |
e718eeb4 | 196 | #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ |
e718eeb4 | 197 | #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above |
1da177e4 | 198 | * 32 bits in size */ |
bd186aa9 | 199 | #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ |
e718eeb4 NS |
200 | #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ |
201 | #define XFS_MOUNT_BARRIER (1ULL << 17) | |
1bd960ee | 202 | #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ |
e718eeb4 | 203 | #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width |
1da177e4 | 204 | * allocation */ |
bd186aa9 | 205 | #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ |
e718eeb4 NS |
206 | #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ |
207 | #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred | |
e8c8b3a7 | 208 | * I/O size in stat() */ |
2a82b8be DC |
209 | #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams |
210 | allocator */ | |
7c12f296 | 211 | #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ |
e8c8b3a7 | 212 | |
1da177e4 LT |
213 | |
214 | /* | |
215 | * Default minimum read and write sizes. | |
216 | */ | |
217 | #define XFS_READIO_LOG_LARGE 16 | |
218 | #define XFS_WRITEIO_LOG_LARGE 16 | |
219 | ||
220 | /* | |
1f443ad7 NS |
221 | * Max and min values for mount-option defined I/O |
222 | * preallocation sizes. | |
1da177e4 | 223 | */ |
1f443ad7 | 224 | #define XFS_MAX_IO_LOG 30 /* 1G */ |
1da177e4 LT |
225 | #define XFS_MIN_IO_LOG PAGE_SHIFT |
226 | ||
227 | /* | |
228 | * Synchronous read and write sizes. This should be | |
229 | * better for NFSv2 wsync filesystems. | |
230 | */ | |
9da096fd MP |
231 | #define XFS_WSYNC_READIO_LOG 15 /* 32k */ |
232 | #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ | |
1da177e4 | 233 | |
e8c8b3a7 DC |
234 | /* |
235 | * Allow large block sizes to be reported to userspace programs if the | |
556b8b16 | 236 | * "largeio" mount option is used. |
e8c8b3a7 DC |
237 | * |
238 | * If compatibility mode is specified, simply return the basic unit of caching | |
239 | * so that we don't get inefficient read/modify/write I/O from user apps. | |
240 | * Otherwise.... | |
241 | * | |
242 | * If the underlying volume is a stripe, then return the stripe width in bytes | |
243 | * as the recommended I/O size. It is not a stripe and we've set a default | |
244 | * buffered I/O size, return that, otherwise return the compat default. | |
245 | */ | |
246 | static inline unsigned long | |
247 | xfs_preferred_iosize(xfs_mount_t *mp) | |
248 | { | |
249 | if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) | |
250 | return PAGE_CACHE_SIZE; | |
251 | return (mp->m_swidth ? | |
252 | (mp->m_swidth << mp->m_sb.sb_blocklog) : | |
253 | ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? | |
254 | (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : | |
255 | PAGE_CACHE_SIZE)); | |
256 | } | |
257 | ||
92821e2b DC |
258 | #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ |
259 | ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) | |
1da177e4 | 260 | #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) |
745f6919 CH |
261 | void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, |
262 | int lnnum); | |
1da177e4 | 263 | #define xfs_force_shutdown(m,f) \ |
745f6919 | 264 | xfs_do_force_shutdown(m, f, __FILE__, __LINE__) |
1da177e4 | 265 | |
2b5decd0 CH |
266 | #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
267 | #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ | |
268 | #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ | |
269 | #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ | |
270 | #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ | |
271 | #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ | |
272 | ||
1da177e4 LT |
273 | /* |
274 | * Flags for xfs_mountfs | |
275 | */ | |
764d1f89 | 276 | #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ |
1da177e4 | 277 | |
a844f451 NS |
278 | static inline xfs_agnumber_t |
279 | xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) | |
1da177e4 | 280 | { |
a844f451 NS |
281 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
282 | do_div(ld, mp->m_sb.sb_agblocks); | |
283 | return (xfs_agnumber_t) ld; | |
1da177e4 LT |
284 | } |
285 | ||
a844f451 NS |
286 | static inline xfs_agblock_t |
287 | xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) | |
1da177e4 | 288 | { |
a844f451 NS |
289 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
290 | return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); | |
1da177e4 LT |
291 | } |
292 | ||
03135cf7 DC |
293 | /* |
294 | * Per-cpu superblock locking functions | |
295 | */ | |
296 | #ifdef HAVE_PERCPU_SB | |
b8f82a4a | 297 | static inline void |
03135cf7 DC |
298 | xfs_icsb_lock(xfs_mount_t *mp) |
299 | { | |
300 | mutex_lock(&mp->m_icsb_mutex); | |
301 | } | |
302 | ||
b8f82a4a | 303 | static inline void |
03135cf7 DC |
304 | xfs_icsb_unlock(xfs_mount_t *mp) |
305 | { | |
306 | mutex_unlock(&mp->m_icsb_mutex); | |
307 | } | |
308 | #else | |
309 | #define xfs_icsb_lock(mp) | |
310 | #define xfs_icsb_unlock(mp) | |
311 | #endif | |
312 | ||
1da177e4 LT |
313 | /* |
314 | * This structure is for use by the xfs_mod_incore_sb_batch() routine. | |
20f4ebf2 | 315 | * xfs_growfs can specify a few fields which are more than int limit |
1da177e4 LT |
316 | */ |
317 | typedef struct xfs_mod_sb { | |
318 | xfs_sb_field_t msb_field; /* Field to modify, see below */ | |
20f4ebf2 | 319 | int64_t msb_delta; /* Change to make to specified field */ |
1da177e4 LT |
320 | } xfs_mod_sb_t; |
321 | ||
9356fe22 DC |
322 | /* |
323 | * Per-ag incore structure, copies of information in agf and agi, to improve the | |
324 | * performance of allocation group selection. This is defined for the kernel | |
325 | * only, and hence is defined here instead of in xfs_ag.h. You need the struct | |
326 | * xfs_mount to be defined to look up a xfs_perag anyway (via mp->m_perag_tree), | |
327 | * so this doesn't introduce any strange header file dependencies. | |
328 | */ | |
329 | typedef struct xfs_perag { | |
330 | struct xfs_mount *pag_mount; /* owner filesystem */ | |
331 | xfs_agnumber_t pag_agno; /* AG this structure belongs to */ | |
332 | atomic_t pag_ref; /* perag reference count */ | |
333 | char pagf_init; /* this agf's entry is initialized */ | |
334 | char pagi_init; /* this agi's entry is initialized */ | |
335 | char pagf_metadata; /* the agf is preferred to be metadata */ | |
336 | char pagi_inodeok; /* The agi is ok for inodes */ | |
337 | __uint8_t pagf_levels[XFS_BTNUM_AGF]; | |
338 | /* # of levels in bno & cnt btree */ | |
339 | __uint32_t pagf_flcount; /* count of blocks in freelist */ | |
340 | xfs_extlen_t pagf_freeblks; /* total free blocks */ | |
341 | xfs_extlen_t pagf_longest; /* longest free space */ | |
342 | __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ | |
343 | xfs_agino_t pagi_freecount; /* number of free inodes */ | |
344 | xfs_agino_t pagi_count; /* number of allocated inodes */ | |
345 | ||
346 | /* | |
347 | * Inode allocation search lookup optimisation. | |
348 | * If the pagino matches, the search for new inodes | |
349 | * doesn't need to search the near ones again straight away | |
350 | */ | |
351 | xfs_agino_t pagl_pagino; | |
352 | xfs_agino_t pagl_leftrec; | |
353 | xfs_agino_t pagl_rightrec; | |
354 | spinlock_t pagb_lock; /* lock for pagb_tree */ | |
355 | struct rb_root pagb_tree; /* ordered tree of busy extents */ | |
356 | ||
357 | atomic_t pagf_fstrms; /* # of filestreams active in this AG */ | |
358 | ||
359 | spinlock_t pag_ici_lock; /* incore inode cache lock */ | |
360 | struct radix_tree_root pag_ici_root; /* incore inode cache root */ | |
361 | int pag_ici_reclaimable; /* reclaimable inodes */ | |
362 | struct mutex pag_ici_reclaim_lock; /* serialisation point */ | |
363 | unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ | |
364 | ||
365 | /* buffer cache index */ | |
366 | spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ | |
367 | struct rb_root pag_buf_tree; /* ordered tree of active buffers */ | |
368 | ||
369 | /* for rcu-safe freeing */ | |
370 | struct rcu_head rcu_head; | |
371 | int pagb_count; /* pagb slots in use */ | |
372 | } xfs_perag_t; | |
373 | ||
adab0f67 | 374 | extern int xfs_log_sbcount(xfs_mount_t *); |
d5db0f97 | 375 | extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); |
4249023a | 376 | extern int xfs_mountfs(xfs_mount_t *mp); |
ff55068c DC |
377 | extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, |
378 | xfs_agnumber_t *maxagi); | |
1da177e4 | 379 | |
41b5c2e7 | 380 | extern void xfs_unmountfs(xfs_mount_t *); |
20f4ebf2 | 381 | extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); |
1da177e4 LT |
382 | extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, |
383 | uint, int); | |
7884bc86 | 384 | extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); |
1da177e4 | 385 | extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); |
764d1f89 | 386 | extern int xfs_readsb(xfs_mount_t *, int); |
1da177e4 | 387 | extern void xfs_freesb(xfs_mount_t *); |
92821e2b | 388 | extern int xfs_fs_writable(xfs_mount_t *); |
4cc929ee | 389 | extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); |
1da177e4 | 390 | |
d7658d48 CH |
391 | extern int xfs_dev_is_read_only(struct xfs_mount *, char *); |
392 | ||
055388a3 DC |
393 | extern void xfs_set_low_space_thresholds(struct xfs_mount *); |
394 | ||
1da177e4 LT |
395 | #endif /* __KERNEL__ */ |
396 | ||
397 | #endif /* __XFS_MOUNT_H__ */ |