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 | ||
ad223e60 | 21 | struct xlog; |
1da177e4 | 22 | struct xfs_inode; |
2a82b8be | 23 | struct xfs_mru_cache; |
5163f95a | 24 | struct xfs_nameops; |
82fa9012 | 25 | struct xfs_ail; |
7d095257 | 26 | struct xfs_quotainfo; |
32c5483a | 27 | struct xfs_dir_ops; |
0650b554 | 28 | struct xfs_da_geometry; |
7d095257 | 29 | |
055388a3 DC |
30 | /* dynamic preallocation free space thresholds, 5% down to 1% */ |
31 | enum { | |
32 | XFS_LOWSP_1_PCNT = 0, | |
33 | XFS_LOWSP_2_PCNT, | |
34 | XFS_LOWSP_3_PCNT, | |
35 | XFS_LOWSP_4_PCNT, | |
36 | XFS_LOWSP_5_PCNT, | |
37 | XFS_LOWSP_MAX, | |
38 | }; | |
39 | ||
192852be CM |
40 | /* |
41 | * Error Configuration | |
42 | * | |
43 | * Error classes define the subsystem the configuration belongs to. | |
44 | * Error numbers define the errors that are configurable. | |
45 | */ | |
46 | enum { | |
47 | XFS_ERR_CLASS_MAX, | |
48 | }; | |
49 | enum { | |
50 | XFS_ERR_ERRNO_MAX, | |
51 | }; | |
52 | ||
53 | struct xfs_error_cfg { | |
54 | struct xfs_kobj kobj; | |
55 | int max_retries; | |
56 | }; | |
57 | ||
1da177e4 | 58 | typedef struct xfs_mount { |
b267ce99 | 59 | struct super_block *m_super; |
1da177e4 | 60 | xfs_tid_t m_tid; /* next unused tid for fs */ |
82fa9012 | 61 | struct xfs_ail *m_ail; /* fs active log item list */ |
501ab323 DC |
62 | |
63 | struct xfs_sb m_sb; /* copy of fs superblock */ | |
3685c2a1 | 64 | spinlock_t m_sb_lock; /* sb counter lock */ |
501ab323 | 65 | struct percpu_counter m_icount; /* allocated inodes counter */ |
e88b64ea | 66 | struct percpu_counter m_ifree; /* free inodes counter */ |
0d485ada | 67 | struct percpu_counter m_fdblocks; /* free block counter */ |
501ab323 | 68 | |
1da177e4 LT |
69 | struct xfs_buf *m_sb_bp; /* buffer for superblock */ |
70 | char *m_fsname; /* filesystem name */ | |
71 | int m_fsname_len; /* strlen of fs name */ | |
fc1f8c1c NS |
72 | char *m_rtname; /* realtime device name */ |
73 | char *m_logname; /* external log device name */ | |
1da177e4 LT |
74 | int m_bsize; /* fs logical block size */ |
75 | xfs_agnumber_t m_agfrotor; /* last ag where space found */ | |
76 | xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ | |
36e41eeb | 77 | spinlock_t m_agirotor_lock;/* .. and lock protecting it */ |
1da177e4 | 78 | xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
1da177e4 LT |
79 | uint m_readio_log; /* min read size log bytes */ |
80 | uint m_readio_blocks; /* min read size blocks */ | |
81 | uint m_writeio_log; /* min write size log bytes */ | |
82 | uint m_writeio_blocks; /* min write size blocks */ | |
0650b554 DC |
83 | struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ |
84 | struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ | |
ad223e60 | 85 | struct xlog *m_log; /* log specific stuff */ |
1da177e4 LT |
86 | int m_logbufs; /* number of log buffers */ |
87 | int m_logbsize; /* size of each log buffer */ | |
88 | uint m_rsumlevels; /* rt summary levels */ | |
89 | uint m_rsumsize; /* size of rt summary, bytes */ | |
90 | struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ | |
91 | struct xfs_inode *m_rsumip; /* pointer to summary inode */ | |
92 | struct xfs_inode *m_rootip; /* pointer to root directory */ | |
93 | struct xfs_quotainfo *m_quotainfo; /* disk quota information */ | |
94 | xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ | |
95 | xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ | |
96 | xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ | |
1da177e4 LT |
97 | __uint8_t m_blkbit_log; /* blocklog + NBBY */ |
98 | __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ | |
99 | __uint8_t m_agno_log; /* log #ag's */ | |
100 | __uint8_t m_agino_log; /* #bits for agino in inum */ | |
8f80587b | 101 | uint m_inode_cluster_size;/* min inode buf size */ |
1da177e4 LT |
102 | uint m_blockmask; /* sb_blocksize-1 */ |
103 | uint m_blockwsize; /* sb_blocksize in words */ | |
104 | uint m_blockwmask; /* blockwsize-1 */ | |
60197e8d CH |
105 | uint m_alloc_mxr[2]; /* max alloc btree records */ |
106 | uint m_alloc_mnr[2]; /* min alloc btree records */ | |
107 | uint m_bmap_dmxr[2]; /* max bmap btree records */ | |
108 | uint m_bmap_dmnr[2]; /* min bmap btree records */ | |
109 | uint m_inobt_mxr[2]; /* max inobt btree records */ | |
110 | uint m_inobt_mnr[2]; /* min inobt btree records */ | |
1da177e4 LT |
111 | uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
112 | uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ | |
0d87e656 | 113 | uint m_in_maxlevels; /* max inobt btree levels. */ |
1c1c6ebc DC |
114 | struct radix_tree_root m_perag_tree; /* per-ag accounting info */ |
115 | spinlock_t m_perag_lock; /* lock for m_perag_tree */ | |
cc92e7ac | 116 | struct mutex m_growlock; /* growfs mutex */ |
1da177e4 LT |
117 | int m_fixedfsid[2]; /* unchanged for life of FS */ |
118 | uint m_dmevmask; /* DMI events for this FS */ | |
e718eeb4 | 119 | __uint64_t m_flags; /* global mount flags */ |
1da177e4 LT |
120 | int m_ialloc_inos; /* inodes in inode allocation */ |
121 | int m_ialloc_blks; /* blocks in inode allocation */ | |
066a1884 BF |
122 | int m_ialloc_min_blks;/* min blocks in sparse inode |
123 | * allocation */ | |
1da177e4 LT |
124 | int m_inoalign_mask;/* mask sb_inoalignmt if used */ |
125 | uint m_qflags; /* quota status flags */ | |
0eadd102 | 126 | struct xfs_trans_resv m_resv; /* precomputed res values */ |
1da177e4 | 127 | __uint64_t m_maxicount; /* maximum inode count */ |
1da177e4 LT |
128 | __uint64_t m_resblks; /* total reserved blocks */ |
129 | __uint64_t m_resblks_avail;/* available reserved blocks */ | |
cbe132a8 | 130 | __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ |
1da177e4 LT |
131 | int m_dalign; /* stripe unit */ |
132 | int m_swidth; /* stripe width */ | |
c41564b5 | 133 | int m_sinoalign; /* stripe unit inode alignment */ |
1da177e4 | 134 | __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ |
5163f95a | 135 | const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ |
32c5483a | 136 | const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ |
4bceb18f | 137 | const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ |
1da177e4 | 138 | uint m_chsize; /* size of next field */ |
1da177e4 | 139 | atomic_t m_active_trans; /* number trans frozen */ |
2a82b8be | 140 | struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ |
a7b339f1 | 141 | struct delayed_work m_reclaim_work; /* background inode reclaim */ |
579b62fa BF |
142 | struct delayed_work m_eofblocks_work; /* background eof blocks |
143 | trimming */ | |
61e63ecb | 144 | bool m_update_sb; /* sb needs update in mount */ |
055388a3 DC |
145 | int64_t m_low_space[XFS_LOWSP_MAX]; |
146 | /* low free space thresholds */ | |
a31b1d3d | 147 | struct xfs_kobj m_kobj; |
192852be CM |
148 | struct xfs_kobj m_error_kobj; |
149 | struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX]; | |
225e4635 | 150 | struct xstats m_stats; /* per-fs stats */ |
aa6bf01d | 151 | |
78c931b8 | 152 | struct workqueue_struct *m_buf_workqueue; |
aa6bf01d CH |
153 | struct workqueue_struct *m_data_workqueue; |
154 | struct workqueue_struct *m_unwritten_workqueue; | |
4c2d542f | 155 | struct workqueue_struct *m_cil_workqueue; |
5889608d DC |
156 | struct workqueue_struct *m_reclaim_workqueue; |
157 | struct workqueue_struct *m_log_workqueue; | |
579b62fa | 158 | struct workqueue_struct *m_eofblocks_workqueue; |
52785112 CH |
159 | |
160 | /* | |
161 | * Generation of the filesysyem layout. This is incremented by each | |
162 | * growfs, and used by the pNFS server to ensure the client updates | |
163 | * its view of the block device once it gets a layout that might | |
164 | * reference the newly added blocks. Does not need to be persistent | |
165 | * as long as we only allow file system size increments, but if we | |
166 | * ever support shrinks it would have to be persisted in addition | |
167 | * to various other kinds of pain inflicted on the pNFS server. | |
168 | */ | |
169 | __uint32_t m_generation; | |
801cc4e1 BF |
170 | |
171 | #ifdef DEBUG | |
172 | /* | |
173 | * DEBUG mode instrumentation to test and/or trigger delayed allocation | |
174 | * block killing in the event of failed writes. When enabled, all | |
175 | * buffered writes are forced to fail. All delalloc blocks in the range | |
176 | * of the write (including pre-existing delalloc blocks!) are tossed as | |
177 | * part of the write failure error handling sequence. | |
178 | */ | |
179 | bool m_fail_writes; | |
180 | #endif | |
1da177e4 LT |
181 | } xfs_mount_t; |
182 | ||
183 | /* | |
184 | * Flags for m_flags. | |
185 | */ | |
92821e2b | 186 | #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops |
1da177e4 LT |
187 | must be synchronous except |
188 | for space allocations */ | |
92821e2b | 189 | #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) |
e718eeb4 | 190 | #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem |
1da177e4 LT |
191 | operations, typically for |
192 | disk errors in metadata */ | |
e84661aa | 193 | #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ |
e718eeb4 | 194 | #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment |
1da177e4 | 195 | allocations */ |
13059ff0 | 196 | #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ |
bd186aa9 | 197 | #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ |
e718eeb4 | 198 | #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ |
e718eeb4 | 199 | #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ |
12c3f05c ES |
200 | #define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */ |
201 | #define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */ | |
e718eeb4 NS |
202 | #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ |
203 | #define XFS_MOUNT_BARRIER (1ULL << 17) | |
1bd960ee | 204 | #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ |
e718eeb4 | 205 | #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width |
1da177e4 | 206 | * allocation */ |
bd186aa9 | 207 | #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ |
e718eeb4 NS |
208 | #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ |
209 | #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred | |
e8c8b3a7 | 210 | * I/O size in stat() */ |
2a82b8be DC |
211 | #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams |
212 | allocator */ | |
7c12f296 | 213 | #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ |
e8c8b3a7 | 214 | |
cbe4dab1 DC |
215 | #define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */ |
216 | ||
1da177e4 LT |
217 | |
218 | /* | |
219 | * Default minimum read and write sizes. | |
220 | */ | |
221 | #define XFS_READIO_LOG_LARGE 16 | |
222 | #define XFS_WRITEIO_LOG_LARGE 16 | |
223 | ||
224 | /* | |
1f443ad7 NS |
225 | * Max and min values for mount-option defined I/O |
226 | * preallocation sizes. | |
1da177e4 | 227 | */ |
1f443ad7 | 228 | #define XFS_MAX_IO_LOG 30 /* 1G */ |
1da177e4 LT |
229 | #define XFS_MIN_IO_LOG PAGE_SHIFT |
230 | ||
231 | /* | |
232 | * Synchronous read and write sizes. This should be | |
233 | * better for NFSv2 wsync filesystems. | |
234 | */ | |
9da096fd MP |
235 | #define XFS_WSYNC_READIO_LOG 15 /* 32k */ |
236 | #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ | |
1da177e4 | 237 | |
e8c8b3a7 DC |
238 | /* |
239 | * Allow large block sizes to be reported to userspace programs if the | |
556b8b16 | 240 | * "largeio" mount option is used. |
e8c8b3a7 DC |
241 | * |
242 | * If compatibility mode is specified, simply return the basic unit of caching | |
243 | * so that we don't get inefficient read/modify/write I/O from user apps. | |
244 | * Otherwise.... | |
245 | * | |
246 | * If the underlying volume is a stripe, then return the stripe width in bytes | |
247 | * as the recommended I/O size. It is not a stripe and we've set a default | |
248 | * buffered I/O size, return that, otherwise return the compat default. | |
249 | */ | |
250 | static inline unsigned long | |
251 | xfs_preferred_iosize(xfs_mount_t *mp) | |
252 | { | |
253 | if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) | |
254 | return PAGE_CACHE_SIZE; | |
255 | return (mp->m_swidth ? | |
256 | (mp->m_swidth << mp->m_sb.sb_blocklog) : | |
257 | ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? | |
258 | (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : | |
259 | PAGE_CACHE_SIZE)); | |
260 | } | |
261 | ||
92821e2b DC |
262 | #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ |
263 | ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) | |
1da177e4 | 264 | #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) |
745f6919 CH |
265 | void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, |
266 | int lnnum); | |
1da177e4 | 267 | #define xfs_force_shutdown(m,f) \ |
745f6919 | 268 | xfs_do_force_shutdown(m, f, __FILE__, __LINE__) |
1da177e4 | 269 | |
2b5decd0 CH |
270 | #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
271 | #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ | |
272 | #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ | |
273 | #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ | |
274 | #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ | |
275 | #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ | |
276 | ||
1da177e4 LT |
277 | /* |
278 | * Flags for xfs_mountfs | |
279 | */ | |
764d1f89 | 280 | #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ |
1da177e4 | 281 | |
a844f451 NS |
282 | static inline xfs_agnumber_t |
283 | xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) | |
1da177e4 | 284 | { |
a844f451 NS |
285 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
286 | do_div(ld, mp->m_sb.sb_agblocks); | |
287 | return (xfs_agnumber_t) ld; | |
1da177e4 LT |
288 | } |
289 | ||
a844f451 NS |
290 | static inline xfs_agblock_t |
291 | xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) | |
1da177e4 | 292 | { |
a844f451 NS |
293 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
294 | return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); | |
1da177e4 LT |
295 | } |
296 | ||
801cc4e1 BF |
297 | #ifdef DEBUG |
298 | static inline bool | |
299 | xfs_mp_fail_writes(struct xfs_mount *mp) | |
300 | { | |
301 | return mp->m_fail_writes; | |
302 | } | |
303 | #else | |
304 | static inline bool | |
305 | xfs_mp_fail_writes(struct xfs_mount *mp) | |
306 | { | |
307 | return 0; | |
308 | } | |
309 | #endif | |
310 | ||
9356fe22 DC |
311 | /* |
312 | * Per-ag incore structure, copies of information in agf and agi, to improve the | |
4fb6e8ad | 313 | * performance of allocation group selection. |
9356fe22 DC |
314 | */ |
315 | typedef struct xfs_perag { | |
316 | struct xfs_mount *pag_mount; /* owner filesystem */ | |
317 | xfs_agnumber_t pag_agno; /* AG this structure belongs to */ | |
318 | atomic_t pag_ref; /* perag reference count */ | |
319 | char pagf_init; /* this agf's entry is initialized */ | |
320 | char pagi_init; /* this agi's entry is initialized */ | |
321 | char pagf_metadata; /* the agf is preferred to be metadata */ | |
322 | char pagi_inodeok; /* The agi is ok for inodes */ | |
323 | __uint8_t pagf_levels[XFS_BTNUM_AGF]; | |
324 | /* # of levels in bno & cnt btree */ | |
325 | __uint32_t pagf_flcount; /* count of blocks in freelist */ | |
326 | xfs_extlen_t pagf_freeblks; /* total free blocks */ | |
327 | xfs_extlen_t pagf_longest; /* longest free space */ | |
328 | __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ | |
329 | xfs_agino_t pagi_freecount; /* number of free inodes */ | |
330 | xfs_agino_t pagi_count; /* number of allocated inodes */ | |
331 | ||
332 | /* | |
333 | * Inode allocation search lookup optimisation. | |
334 | * If the pagino matches, the search for new inodes | |
335 | * doesn't need to search the near ones again straight away | |
336 | */ | |
337 | xfs_agino_t pagl_pagino; | |
338 | xfs_agino_t pagl_leftrec; | |
339 | xfs_agino_t pagl_rightrec; | |
340 | spinlock_t pagb_lock; /* lock for pagb_tree */ | |
341 | struct rb_root pagb_tree; /* ordered tree of busy extents */ | |
342 | ||
343 | atomic_t pagf_fstrms; /* # of filestreams active in this AG */ | |
344 | ||
345 | spinlock_t pag_ici_lock; /* incore inode cache lock */ | |
346 | struct radix_tree_root pag_ici_root; /* incore inode cache root */ | |
347 | int pag_ici_reclaimable; /* reclaimable inodes */ | |
348 | struct mutex pag_ici_reclaim_lock; /* serialisation point */ | |
349 | unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ | |
350 | ||
351 | /* buffer cache index */ | |
352 | spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ | |
353 | struct rb_root pag_buf_tree; /* ordered tree of active buffers */ | |
354 | ||
355 | /* for rcu-safe freeing */ | |
356 | struct rcu_head rcu_head; | |
357 | int pagb_count; /* pagb slots in use */ | |
358 | } xfs_perag_t; | |
359 | ||
af3b6382 | 360 | extern void xfs_uuid_table_free(void); |
adab0f67 | 361 | extern int xfs_log_sbcount(xfs_mount_t *); |
d5db0f97 | 362 | extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); |
4249023a | 363 | extern int xfs_mountfs(xfs_mount_t *mp); |
ff55068c DC |
364 | extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, |
365 | xfs_agnumber_t *maxagi); | |
41b5c2e7 | 366 | extern void xfs_unmountfs(xfs_mount_t *); |
964aa8d9 | 367 | |
501ab323 | 368 | extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); |
e88b64ea | 369 | extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); |
0d485ada DC |
370 | extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, |
371 | bool reserved); | |
bab98bbe DC |
372 | extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta); |
373 | ||
1da177e4 | 374 | extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); |
764d1f89 | 375 | extern int xfs_readsb(xfs_mount_t *, int); |
1da177e4 | 376 | extern void xfs_freesb(xfs_mount_t *); |
91ee575f | 377 | extern bool xfs_fs_writable(struct xfs_mount *mp, int level); |
4cc929ee | 378 | extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); |
1da177e4 | 379 | |
d7658d48 CH |
380 | extern int xfs_dev_is_read_only(struct xfs_mount *, char *); |
381 | ||
055388a3 DC |
382 | extern void xfs_set_low_space_thresholds(struct xfs_mount *); |
383 | ||
3fbbbea3 DC |
384 | int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb, |
385 | xfs_off_t count_fsb); | |
386 | ||
1da177e4 | 387 | #endif /* __XFS_MOUNT_H__ */ |