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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; | |
01e1b69c | 44 | unsigned long icsb_flags; |
8d280b98 DC |
45 | } xfs_icsb_cnts_t; |
46 | ||
01e1b69c DC |
47 | #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ |
48 | ||
8d280b98 DC |
49 | #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ |
50 | ||
51 | extern int xfs_icsb_init_counters(struct xfs_mount *); | |
5478eead | 52 | extern void xfs_icsb_reinit_counters(struct xfs_mount *); |
c962fb79 | 53 | extern void xfs_icsb_destroy_counters(struct xfs_mount *); |
d4d90b57 CH |
54 | extern void xfs_icsb_sync_counters(struct xfs_mount *, int); |
55 | extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); | |
96540c78 CH |
56 | extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, |
57 | int64_t, int); | |
8d280b98 DC |
58 | |
59 | #else | |
c962fb79 CH |
60 | #define xfs_icsb_init_counters(mp) (0) |
61 | #define xfs_icsb_destroy_counters(mp) do { } while (0) | |
62 | #define xfs_icsb_reinit_counters(mp) do { } while (0) | |
d4d90b57 | 63 | #define xfs_icsb_sync_counters(mp, flags) do { } while (0) |
7155054c | 64 | #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) |
96540c78 CH |
65 | #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ |
66 | xfs_mod_incore_sb(mp, field, delta, rsvd) | |
8d280b98 | 67 | #endif |
1da177e4 | 68 | |
055388a3 DC |
69 | /* dynamic preallocation free space thresholds, 5% down to 1% */ |
70 | enum { | |
71 | XFS_LOWSP_1_PCNT = 0, | |
72 | XFS_LOWSP_2_PCNT, | |
73 | XFS_LOWSP_3_PCNT, | |
74 | XFS_LOWSP_4_PCNT, | |
75 | XFS_LOWSP_5_PCNT, | |
76 | XFS_LOWSP_MAX, | |
77 | }; | |
78 | ||
1da177e4 | 79 | typedef struct xfs_mount { |
b267ce99 | 80 | struct super_block *m_super; |
1da177e4 | 81 | xfs_tid_t m_tid; /* next unused tid for fs */ |
82fa9012 | 82 | struct xfs_ail *m_ail; /* fs active log item list */ |
501ab323 DC |
83 | |
84 | struct xfs_sb m_sb; /* copy of fs superblock */ | |
3685c2a1 | 85 | spinlock_t m_sb_lock; /* sb counter lock */ |
501ab323 DC |
86 | struct percpu_counter m_icount; /* allocated inodes counter */ |
87 | ||
1da177e4 LT |
88 | struct xfs_buf *m_sb_bp; /* buffer for superblock */ |
89 | char *m_fsname; /* filesystem name */ | |
90 | int m_fsname_len; /* strlen of fs name */ | |
fc1f8c1c NS |
91 | char *m_rtname; /* realtime device name */ |
92 | char *m_logname; /* external log device name */ | |
1da177e4 LT |
93 | int m_bsize; /* fs logical block size */ |
94 | xfs_agnumber_t m_agfrotor; /* last ag where space found */ | |
95 | xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ | |
36e41eeb | 96 | spinlock_t m_agirotor_lock;/* .. and lock protecting it */ |
1da177e4 | 97 | xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
1da177e4 LT |
98 | uint m_readio_log; /* min read size log bytes */ |
99 | uint m_readio_blocks; /* min read size blocks */ | |
100 | uint m_writeio_log; /* min write size log bytes */ | |
101 | uint m_writeio_blocks; /* min write size blocks */ | |
0650b554 DC |
102 | struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ |
103 | struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ | |
ad223e60 | 104 | struct xlog *m_log; /* log specific stuff */ |
1da177e4 LT |
105 | int m_logbufs; /* number of log buffers */ |
106 | int m_logbsize; /* size of each log buffer */ | |
107 | uint m_rsumlevels; /* rt summary levels */ | |
108 | uint m_rsumsize; /* size of rt summary, bytes */ | |
109 | struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ | |
110 | struct xfs_inode *m_rsumip; /* pointer to summary inode */ | |
111 | struct xfs_inode *m_rootip; /* pointer to root directory */ | |
112 | struct xfs_quotainfo *m_quotainfo; /* disk quota information */ | |
113 | xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ | |
114 | xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ | |
115 | xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ | |
1da177e4 LT |
116 | __uint8_t m_blkbit_log; /* blocklog + NBBY */ |
117 | __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ | |
118 | __uint8_t m_agno_log; /* log #ag's */ | |
119 | __uint8_t m_agino_log; /* #bits for agino in inum */ | |
8f80587b | 120 | uint m_inode_cluster_size;/* min inode buf size */ |
1da177e4 LT |
121 | uint m_blockmask; /* sb_blocksize-1 */ |
122 | uint m_blockwsize; /* sb_blocksize in words */ | |
123 | uint m_blockwmask; /* blockwsize-1 */ | |
60197e8d CH |
124 | uint m_alloc_mxr[2]; /* max alloc btree records */ |
125 | uint m_alloc_mnr[2]; /* min alloc btree records */ | |
126 | uint m_bmap_dmxr[2]; /* max bmap btree records */ | |
127 | uint m_bmap_dmnr[2]; /* min bmap btree records */ | |
128 | uint m_inobt_mxr[2]; /* max inobt btree records */ | |
129 | uint m_inobt_mnr[2]; /* min inobt btree records */ | |
1da177e4 LT |
130 | uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
131 | uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ | |
0d87e656 | 132 | uint m_in_maxlevels; /* max inobt btree levels. */ |
1c1c6ebc DC |
133 | struct radix_tree_root m_perag_tree; /* per-ag accounting info */ |
134 | spinlock_t m_perag_lock; /* lock for m_perag_tree */ | |
cc92e7ac | 135 | struct mutex m_growlock; /* growfs mutex */ |
1da177e4 LT |
136 | int m_fixedfsid[2]; /* unchanged for life of FS */ |
137 | uint m_dmevmask; /* DMI events for this FS */ | |
e718eeb4 | 138 | __uint64_t m_flags; /* global mount flags */ |
1da177e4 LT |
139 | int m_ialloc_inos; /* inodes in inode allocation */ |
140 | int m_ialloc_blks; /* blocks in inode allocation */ | |
1da177e4 LT |
141 | int m_inoalign_mask;/* mask sb_inoalignmt if used */ |
142 | uint m_qflags; /* quota status flags */ | |
0eadd102 | 143 | struct xfs_trans_resv m_resv; /* precomputed res values */ |
1da177e4 | 144 | __uint64_t m_maxicount; /* maximum inode count */ |
1da177e4 LT |
145 | __uint64_t m_resblks; /* total reserved blocks */ |
146 | __uint64_t m_resblks_avail;/* available reserved blocks */ | |
cbe132a8 | 147 | __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ |
1da177e4 LT |
148 | int m_dalign; /* stripe unit */ |
149 | int m_swidth; /* stripe width */ | |
c41564b5 | 150 | int m_sinoalign; /* stripe unit inode alignment */ |
1da177e4 | 151 | __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ |
5163f95a | 152 | const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ |
32c5483a | 153 | const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ |
4bceb18f | 154 | const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ |
1da177e4 | 155 | uint m_chsize; /* size of next field */ |
1da177e4 | 156 | atomic_t m_active_trans; /* number trans frozen */ |
8d280b98 | 157 | #ifdef HAVE_PERCPU_SB |
003cb608 | 158 | xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ |
8d280b98 | 159 | unsigned long m_icsb_counters; /* disabled per-cpu counters */ |
e8234a68 | 160 | struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ |
20b64285 | 161 | struct mutex m_icsb_mutex; /* balancer sync lock */ |
8d280b98 | 162 | #endif |
2a82b8be | 163 | struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ |
a7b339f1 | 164 | struct delayed_work m_reclaim_work; /* background inode reclaim */ |
579b62fa BF |
165 | struct delayed_work m_eofblocks_work; /* background eof blocks |
166 | trimming */ | |
61e63ecb | 167 | bool m_update_sb; /* sb needs update in mount */ |
055388a3 DC |
168 | int64_t m_low_space[XFS_LOWSP_MAX]; |
169 | /* low free space thresholds */ | |
a31b1d3d | 170 | struct xfs_kobj m_kobj; |
aa6bf01d | 171 | |
78c931b8 | 172 | struct workqueue_struct *m_buf_workqueue; |
aa6bf01d CH |
173 | struct workqueue_struct *m_data_workqueue; |
174 | struct workqueue_struct *m_unwritten_workqueue; | |
4c2d542f | 175 | struct workqueue_struct *m_cil_workqueue; |
5889608d DC |
176 | struct workqueue_struct *m_reclaim_workqueue; |
177 | struct workqueue_struct *m_log_workqueue; | |
579b62fa | 178 | struct workqueue_struct *m_eofblocks_workqueue; |
52785112 CH |
179 | |
180 | /* | |
181 | * Generation of the filesysyem layout. This is incremented by each | |
182 | * growfs, and used by the pNFS server to ensure the client updates | |
183 | * its view of the block device once it gets a layout that might | |
184 | * reference the newly added blocks. Does not need to be persistent | |
185 | * as long as we only allow file system size increments, but if we | |
186 | * ever support shrinks it would have to be persisted in addition | |
187 | * to various other kinds of pain inflicted on the pNFS server. | |
188 | */ | |
189 | __uint32_t m_generation; | |
1da177e4 LT |
190 | } xfs_mount_t; |
191 | ||
192 | /* | |
193 | * Flags for m_flags. | |
194 | */ | |
92821e2b | 195 | #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops |
1da177e4 LT |
196 | must be synchronous except |
197 | for space allocations */ | |
92821e2b | 198 | #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) |
e718eeb4 | 199 | #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem |
1da177e4 LT |
200 | operations, typically for |
201 | disk errors in metadata */ | |
e84661aa | 202 | #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ |
e718eeb4 | 203 | #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment |
1da177e4 | 204 | allocations */ |
13059ff0 | 205 | #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ |
bd186aa9 | 206 | #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ |
e718eeb4 | 207 | #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ |
e718eeb4 | 208 | #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ |
e718eeb4 | 209 | #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above |
1da177e4 | 210 | * 32 bits in size */ |
bd186aa9 | 211 | #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ |
e718eeb4 NS |
212 | #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ |
213 | #define XFS_MOUNT_BARRIER (1ULL << 17) | |
1bd960ee | 214 | #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ |
e718eeb4 | 215 | #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width |
1da177e4 | 216 | * allocation */ |
bd186aa9 | 217 | #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ |
e718eeb4 NS |
218 | #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ |
219 | #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred | |
e8c8b3a7 | 220 | * I/O size in stat() */ |
2a82b8be DC |
221 | #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams |
222 | allocator */ | |
7c12f296 | 223 | #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ |
e8c8b3a7 | 224 | |
1da177e4 LT |
225 | |
226 | /* | |
227 | * Default minimum read and write sizes. | |
228 | */ | |
229 | #define XFS_READIO_LOG_LARGE 16 | |
230 | #define XFS_WRITEIO_LOG_LARGE 16 | |
231 | ||
232 | /* | |
1f443ad7 NS |
233 | * Max and min values for mount-option defined I/O |
234 | * preallocation sizes. | |
1da177e4 | 235 | */ |
1f443ad7 | 236 | #define XFS_MAX_IO_LOG 30 /* 1G */ |
1da177e4 LT |
237 | #define XFS_MIN_IO_LOG PAGE_SHIFT |
238 | ||
239 | /* | |
240 | * Synchronous read and write sizes. This should be | |
241 | * better for NFSv2 wsync filesystems. | |
242 | */ | |
9da096fd MP |
243 | #define XFS_WSYNC_READIO_LOG 15 /* 32k */ |
244 | #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ | |
1da177e4 | 245 | |
e8c8b3a7 DC |
246 | /* |
247 | * Allow large block sizes to be reported to userspace programs if the | |
556b8b16 | 248 | * "largeio" mount option is used. |
e8c8b3a7 DC |
249 | * |
250 | * If compatibility mode is specified, simply return the basic unit of caching | |
251 | * so that we don't get inefficient read/modify/write I/O from user apps. | |
252 | * Otherwise.... | |
253 | * | |
254 | * If the underlying volume is a stripe, then return the stripe width in bytes | |
255 | * as the recommended I/O size. It is not a stripe and we've set a default | |
256 | * buffered I/O size, return that, otherwise return the compat default. | |
257 | */ | |
258 | static inline unsigned long | |
259 | xfs_preferred_iosize(xfs_mount_t *mp) | |
260 | { | |
261 | if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) | |
262 | return PAGE_CACHE_SIZE; | |
263 | return (mp->m_swidth ? | |
264 | (mp->m_swidth << mp->m_sb.sb_blocklog) : | |
265 | ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? | |
266 | (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : | |
267 | PAGE_CACHE_SIZE)); | |
268 | } | |
269 | ||
92821e2b DC |
270 | #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ |
271 | ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) | |
1da177e4 | 272 | #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) |
745f6919 CH |
273 | void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, |
274 | int lnnum); | |
1da177e4 | 275 | #define xfs_force_shutdown(m,f) \ |
745f6919 | 276 | xfs_do_force_shutdown(m, f, __FILE__, __LINE__) |
1da177e4 | 277 | |
2b5decd0 CH |
278 | #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
279 | #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ | |
280 | #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ | |
281 | #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ | |
282 | #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ | |
283 | #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ | |
284 | ||
1da177e4 LT |
285 | /* |
286 | * Flags for xfs_mountfs | |
287 | */ | |
764d1f89 | 288 | #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ |
1da177e4 | 289 | |
a844f451 NS |
290 | static inline xfs_agnumber_t |
291 | xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) | |
1da177e4 | 292 | { |
a844f451 NS |
293 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
294 | do_div(ld, mp->m_sb.sb_agblocks); | |
295 | return (xfs_agnumber_t) ld; | |
1da177e4 LT |
296 | } |
297 | ||
a844f451 NS |
298 | static inline xfs_agblock_t |
299 | xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) | |
1da177e4 | 300 | { |
a844f451 NS |
301 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
302 | return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); | |
1da177e4 LT |
303 | } |
304 | ||
03135cf7 DC |
305 | /* |
306 | * Per-cpu superblock locking functions | |
307 | */ | |
308 | #ifdef HAVE_PERCPU_SB | |
b8f82a4a | 309 | static inline void |
03135cf7 DC |
310 | xfs_icsb_lock(xfs_mount_t *mp) |
311 | { | |
312 | mutex_lock(&mp->m_icsb_mutex); | |
313 | } | |
314 | ||
b8f82a4a | 315 | static inline void |
03135cf7 DC |
316 | xfs_icsb_unlock(xfs_mount_t *mp) |
317 | { | |
318 | mutex_unlock(&mp->m_icsb_mutex); | |
319 | } | |
320 | #else | |
321 | #define xfs_icsb_lock(mp) | |
322 | #define xfs_icsb_unlock(mp) | |
323 | #endif | |
324 | ||
1da177e4 LT |
325 | /* |
326 | * This structure is for use by the xfs_mod_incore_sb_batch() routine. | |
20f4ebf2 | 327 | * xfs_growfs can specify a few fields which are more than int limit |
1da177e4 LT |
328 | */ |
329 | typedef struct xfs_mod_sb { | |
330 | xfs_sb_field_t msb_field; /* Field to modify, see below */ | |
20f4ebf2 | 331 | int64_t msb_delta; /* Change to make to specified field */ |
1da177e4 LT |
332 | } xfs_mod_sb_t; |
333 | ||
9356fe22 DC |
334 | /* |
335 | * Per-ag incore structure, copies of information in agf and agi, to improve the | |
4fb6e8ad | 336 | * performance of allocation group selection. |
9356fe22 DC |
337 | */ |
338 | typedef struct xfs_perag { | |
339 | struct xfs_mount *pag_mount; /* owner filesystem */ | |
340 | xfs_agnumber_t pag_agno; /* AG this structure belongs to */ | |
341 | atomic_t pag_ref; /* perag reference count */ | |
342 | char pagf_init; /* this agf's entry is initialized */ | |
343 | char pagi_init; /* this agi's entry is initialized */ | |
344 | char pagf_metadata; /* the agf is preferred to be metadata */ | |
345 | char pagi_inodeok; /* The agi is ok for inodes */ | |
346 | __uint8_t pagf_levels[XFS_BTNUM_AGF]; | |
347 | /* # of levels in bno & cnt btree */ | |
348 | __uint32_t pagf_flcount; /* count of blocks in freelist */ | |
349 | xfs_extlen_t pagf_freeblks; /* total free blocks */ | |
350 | xfs_extlen_t pagf_longest; /* longest free space */ | |
351 | __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ | |
352 | xfs_agino_t pagi_freecount; /* number of free inodes */ | |
353 | xfs_agino_t pagi_count; /* number of allocated inodes */ | |
354 | ||
355 | /* | |
356 | * Inode allocation search lookup optimisation. | |
357 | * If the pagino matches, the search for new inodes | |
358 | * doesn't need to search the near ones again straight away | |
359 | */ | |
360 | xfs_agino_t pagl_pagino; | |
361 | xfs_agino_t pagl_leftrec; | |
362 | xfs_agino_t pagl_rightrec; | |
363 | spinlock_t pagb_lock; /* lock for pagb_tree */ | |
364 | struct rb_root pagb_tree; /* ordered tree of busy extents */ | |
365 | ||
366 | atomic_t pagf_fstrms; /* # of filestreams active in this AG */ | |
367 | ||
368 | spinlock_t pag_ici_lock; /* incore inode cache lock */ | |
369 | struct radix_tree_root pag_ici_root; /* incore inode cache root */ | |
370 | int pag_ici_reclaimable; /* reclaimable inodes */ | |
371 | struct mutex pag_ici_reclaim_lock; /* serialisation point */ | |
372 | unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ | |
373 | ||
374 | /* buffer cache index */ | |
375 | spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ | |
376 | struct rb_root pag_buf_tree; /* ordered tree of active buffers */ | |
377 | ||
378 | /* for rcu-safe freeing */ | |
379 | struct rcu_head rcu_head; | |
380 | int pagb_count; /* pagb slots in use */ | |
381 | } xfs_perag_t; | |
382 | ||
adab0f67 | 383 | extern int xfs_log_sbcount(xfs_mount_t *); |
d5db0f97 | 384 | extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); |
4249023a | 385 | extern int xfs_mountfs(xfs_mount_t *mp); |
ff55068c DC |
386 | extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, |
387 | xfs_agnumber_t *maxagi); | |
1da177e4 | 388 | |
41b5c2e7 | 389 | extern void xfs_unmountfs(xfs_mount_t *); |
20f4ebf2 | 390 | extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); |
1da177e4 LT |
391 | extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, |
392 | uint, int); | |
501ab323 | 393 | extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); |
4d11a402 | 394 | extern int xfs_mount_log_sb(xfs_mount_t *); |
1da177e4 | 395 | extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); |
764d1f89 | 396 | extern int xfs_readsb(xfs_mount_t *, int); |
1da177e4 | 397 | extern void xfs_freesb(xfs_mount_t *); |
91ee575f | 398 | extern bool xfs_fs_writable(struct xfs_mount *mp, int level); |
4cc929ee | 399 | extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); |
1da177e4 | 400 | |
d7658d48 CH |
401 | extern int xfs_dev_is_read_only(struct xfs_mount *, char *); |
402 | ||
055388a3 DC |
403 | extern void xfs_set_low_space_thresholds(struct xfs_mount *); |
404 | ||
1da177e4 LT |
405 | #endif /* __KERNEL__ */ |
406 | ||
407 | #endif /* __XFS_MOUNT_H__ */ |