| 1 | /* |
| 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 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 |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 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. |
| 13 | * |
| 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 |
| 17 | */ |
| 18 | #ifndef __XFS_MOUNT_H__ |
| 19 | #define __XFS_MOUNT_H__ |
| 20 | |
| 21 | #ifdef __KERNEL__ |
| 22 | |
| 23 | struct xlog; |
| 24 | struct xfs_inode; |
| 25 | struct xfs_mru_cache; |
| 26 | struct xfs_nameops; |
| 27 | struct xfs_ail; |
| 28 | struct xfs_quotainfo; |
| 29 | struct xfs_dir_ops; |
| 30 | struct xfs_da_geometry; |
| 31 | |
| 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 | unsigned long icsb_flags; |
| 45 | } xfs_icsb_cnts_t; |
| 46 | |
| 47 | #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ |
| 48 | |
| 49 | #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ |
| 50 | |
| 51 | extern int xfs_icsb_init_counters(struct xfs_mount *); |
| 52 | extern void xfs_icsb_reinit_counters(struct xfs_mount *); |
| 53 | extern void xfs_icsb_destroy_counters(struct xfs_mount *); |
| 54 | extern void xfs_icsb_sync_counters(struct xfs_mount *, int); |
| 55 | extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); |
| 56 | extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, |
| 57 | int64_t, int); |
| 58 | |
| 59 | #else |
| 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) |
| 63 | #define xfs_icsb_sync_counters(mp, flags) do { } while (0) |
| 64 | #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) |
| 65 | #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ |
| 66 | xfs_mod_incore_sb(mp, field, delta, rsvd) |
| 67 | #endif |
| 68 | |
| 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 | |
| 79 | typedef struct xfs_mount { |
| 80 | struct super_block *m_super; |
| 81 | xfs_tid_t m_tid; /* next unused tid for fs */ |
| 82 | struct xfs_ail *m_ail; /* fs active log item list */ |
| 83 | |
| 84 | struct xfs_sb m_sb; /* copy of fs superblock */ |
| 85 | spinlock_t m_sb_lock; /* sb counter lock */ |
| 86 | struct percpu_counter m_icount; /* allocated inodes counter */ |
| 87 | struct percpu_counter m_ifree; /* free inodes counter */ |
| 88 | |
| 89 | struct xfs_buf *m_sb_bp; /* buffer for superblock */ |
| 90 | char *m_fsname; /* filesystem name */ |
| 91 | int m_fsname_len; /* strlen of fs name */ |
| 92 | char *m_rtname; /* realtime device name */ |
| 93 | char *m_logname; /* external log device name */ |
| 94 | int m_bsize; /* fs logical block size */ |
| 95 | xfs_agnumber_t m_agfrotor; /* last ag where space found */ |
| 96 | xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ |
| 97 | spinlock_t m_agirotor_lock;/* .. and lock protecting it */ |
| 98 | xfs_agnumber_t m_maxagi; /* highest inode alloc group */ |
| 99 | uint m_readio_log; /* min read size log bytes */ |
| 100 | uint m_readio_blocks; /* min read size blocks */ |
| 101 | uint m_writeio_log; /* min write size log bytes */ |
| 102 | uint m_writeio_blocks; /* min write size blocks */ |
| 103 | struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ |
| 104 | struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ |
| 105 | struct xlog *m_log; /* log specific stuff */ |
| 106 | int m_logbufs; /* number of log buffers */ |
| 107 | int m_logbsize; /* size of each log buffer */ |
| 108 | uint m_rsumlevels; /* rt summary levels */ |
| 109 | uint m_rsumsize; /* size of rt summary, bytes */ |
| 110 | struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ |
| 111 | struct xfs_inode *m_rsumip; /* pointer to summary inode */ |
| 112 | struct xfs_inode *m_rootip; /* pointer to root directory */ |
| 113 | struct xfs_quotainfo *m_quotainfo; /* disk quota information */ |
| 114 | xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ |
| 115 | xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ |
| 116 | xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ |
| 117 | __uint8_t m_blkbit_log; /* blocklog + NBBY */ |
| 118 | __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ |
| 119 | __uint8_t m_agno_log; /* log #ag's */ |
| 120 | __uint8_t m_agino_log; /* #bits for agino in inum */ |
| 121 | uint m_inode_cluster_size;/* min inode buf size */ |
| 122 | uint m_blockmask; /* sb_blocksize-1 */ |
| 123 | uint m_blockwsize; /* sb_blocksize in words */ |
| 124 | uint m_blockwmask; /* blockwsize-1 */ |
| 125 | uint m_alloc_mxr[2]; /* max alloc btree records */ |
| 126 | uint m_alloc_mnr[2]; /* min alloc btree records */ |
| 127 | uint m_bmap_dmxr[2]; /* max bmap btree records */ |
| 128 | uint m_bmap_dmnr[2]; /* min bmap btree records */ |
| 129 | uint m_inobt_mxr[2]; /* max inobt btree records */ |
| 130 | uint m_inobt_mnr[2]; /* min inobt btree records */ |
| 131 | uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
| 132 | uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ |
| 133 | uint m_in_maxlevels; /* max inobt btree levels. */ |
| 134 | struct radix_tree_root m_perag_tree; /* per-ag accounting info */ |
| 135 | spinlock_t m_perag_lock; /* lock for m_perag_tree */ |
| 136 | struct mutex m_growlock; /* growfs mutex */ |
| 137 | int m_fixedfsid[2]; /* unchanged for life of FS */ |
| 138 | uint m_dmevmask; /* DMI events for this FS */ |
| 139 | __uint64_t m_flags; /* global mount flags */ |
| 140 | int m_ialloc_inos; /* inodes in inode allocation */ |
| 141 | int m_ialloc_blks; /* blocks in inode allocation */ |
| 142 | int m_inoalign_mask;/* mask sb_inoalignmt if used */ |
| 143 | uint m_qflags; /* quota status flags */ |
| 144 | struct xfs_trans_resv m_resv; /* precomputed res values */ |
| 145 | __uint64_t m_maxicount; /* maximum inode count */ |
| 146 | __uint64_t m_resblks; /* total reserved blocks */ |
| 147 | __uint64_t m_resblks_avail;/* available reserved blocks */ |
| 148 | __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ |
| 149 | int m_dalign; /* stripe unit */ |
| 150 | int m_swidth; /* stripe width */ |
| 151 | int m_sinoalign; /* stripe unit inode alignment */ |
| 152 | __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ |
| 153 | const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ |
| 154 | const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ |
| 155 | const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ |
| 156 | uint m_chsize; /* size of next field */ |
| 157 | atomic_t m_active_trans; /* number trans frozen */ |
| 158 | #ifdef HAVE_PERCPU_SB |
| 159 | xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ |
| 160 | unsigned long m_icsb_counters; /* disabled per-cpu counters */ |
| 161 | struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ |
| 162 | struct mutex m_icsb_mutex; /* balancer sync lock */ |
| 163 | #endif |
| 164 | struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ |
| 165 | struct delayed_work m_reclaim_work; /* background inode reclaim */ |
| 166 | struct delayed_work m_eofblocks_work; /* background eof blocks |
| 167 | trimming */ |
| 168 | bool m_update_sb; /* sb needs update in mount */ |
| 169 | int64_t m_low_space[XFS_LOWSP_MAX]; |
| 170 | /* low free space thresholds */ |
| 171 | struct xfs_kobj m_kobj; |
| 172 | |
| 173 | struct workqueue_struct *m_buf_workqueue; |
| 174 | struct workqueue_struct *m_data_workqueue; |
| 175 | struct workqueue_struct *m_unwritten_workqueue; |
| 176 | struct workqueue_struct *m_cil_workqueue; |
| 177 | struct workqueue_struct *m_reclaim_workqueue; |
| 178 | struct workqueue_struct *m_log_workqueue; |
| 179 | struct workqueue_struct *m_eofblocks_workqueue; |
| 180 | |
| 181 | /* |
| 182 | * Generation of the filesysyem layout. This is incremented by each |
| 183 | * growfs, and used by the pNFS server to ensure the client updates |
| 184 | * its view of the block device once it gets a layout that might |
| 185 | * reference the newly added blocks. Does not need to be persistent |
| 186 | * as long as we only allow file system size increments, but if we |
| 187 | * ever support shrinks it would have to be persisted in addition |
| 188 | * to various other kinds of pain inflicted on the pNFS server. |
| 189 | */ |
| 190 | __uint32_t m_generation; |
| 191 | } xfs_mount_t; |
| 192 | |
| 193 | /* |
| 194 | * Flags for m_flags. |
| 195 | */ |
| 196 | #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops |
| 197 | must be synchronous except |
| 198 | for space allocations */ |
| 199 | #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) |
| 200 | #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem |
| 201 | operations, typically for |
| 202 | disk errors in metadata */ |
| 203 | #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ |
| 204 | #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment |
| 205 | allocations */ |
| 206 | #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ |
| 207 | #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ |
| 208 | #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ |
| 209 | #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ |
| 210 | #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above |
| 211 | * 32 bits in size */ |
| 212 | #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ |
| 213 | #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ |
| 214 | #define XFS_MOUNT_BARRIER (1ULL << 17) |
| 215 | #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ |
| 216 | #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width |
| 217 | * allocation */ |
| 218 | #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ |
| 219 | #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ |
| 220 | #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred |
| 221 | * I/O size in stat() */ |
| 222 | #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams |
| 223 | allocator */ |
| 224 | #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ |
| 225 | |
| 226 | |
| 227 | /* |
| 228 | * Default minimum read and write sizes. |
| 229 | */ |
| 230 | #define XFS_READIO_LOG_LARGE 16 |
| 231 | #define XFS_WRITEIO_LOG_LARGE 16 |
| 232 | |
| 233 | /* |
| 234 | * Max and min values for mount-option defined I/O |
| 235 | * preallocation sizes. |
| 236 | */ |
| 237 | #define XFS_MAX_IO_LOG 30 /* 1G */ |
| 238 | #define XFS_MIN_IO_LOG PAGE_SHIFT |
| 239 | |
| 240 | /* |
| 241 | * Synchronous read and write sizes. This should be |
| 242 | * better for NFSv2 wsync filesystems. |
| 243 | */ |
| 244 | #define XFS_WSYNC_READIO_LOG 15 /* 32k */ |
| 245 | #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ |
| 246 | |
| 247 | /* |
| 248 | * Allow large block sizes to be reported to userspace programs if the |
| 249 | * "largeio" mount option is used. |
| 250 | * |
| 251 | * If compatibility mode is specified, simply return the basic unit of caching |
| 252 | * so that we don't get inefficient read/modify/write I/O from user apps. |
| 253 | * Otherwise.... |
| 254 | * |
| 255 | * If the underlying volume is a stripe, then return the stripe width in bytes |
| 256 | * as the recommended I/O size. It is not a stripe and we've set a default |
| 257 | * buffered I/O size, return that, otherwise return the compat default. |
| 258 | */ |
| 259 | static inline unsigned long |
| 260 | xfs_preferred_iosize(xfs_mount_t *mp) |
| 261 | { |
| 262 | if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) |
| 263 | return PAGE_CACHE_SIZE; |
| 264 | return (mp->m_swidth ? |
| 265 | (mp->m_swidth << mp->m_sb.sb_blocklog) : |
| 266 | ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? |
| 267 | (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : |
| 268 | PAGE_CACHE_SIZE)); |
| 269 | } |
| 270 | |
| 271 | #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ |
| 272 | ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) |
| 273 | #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) |
| 274 | void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, |
| 275 | int lnnum); |
| 276 | #define xfs_force_shutdown(m,f) \ |
| 277 | xfs_do_force_shutdown(m, f, __FILE__, __LINE__) |
| 278 | |
| 279 | #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
| 280 | #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ |
| 281 | #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ |
| 282 | #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ |
| 283 | #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ |
| 284 | #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ |
| 285 | |
| 286 | /* |
| 287 | * Flags for xfs_mountfs |
| 288 | */ |
| 289 | #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ |
| 290 | |
| 291 | static inline xfs_agnumber_t |
| 292 | xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) |
| 293 | { |
| 294 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
| 295 | do_div(ld, mp->m_sb.sb_agblocks); |
| 296 | return (xfs_agnumber_t) ld; |
| 297 | } |
| 298 | |
| 299 | static inline xfs_agblock_t |
| 300 | xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) |
| 301 | { |
| 302 | xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); |
| 303 | return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); |
| 304 | } |
| 305 | |
| 306 | /* |
| 307 | * Per-cpu superblock locking functions |
| 308 | */ |
| 309 | #ifdef HAVE_PERCPU_SB |
| 310 | static inline void |
| 311 | xfs_icsb_lock(xfs_mount_t *mp) |
| 312 | { |
| 313 | mutex_lock(&mp->m_icsb_mutex); |
| 314 | } |
| 315 | |
| 316 | static inline void |
| 317 | xfs_icsb_unlock(xfs_mount_t *mp) |
| 318 | { |
| 319 | mutex_unlock(&mp->m_icsb_mutex); |
| 320 | } |
| 321 | #else |
| 322 | #define xfs_icsb_lock(mp) |
| 323 | #define xfs_icsb_unlock(mp) |
| 324 | #endif |
| 325 | |
| 326 | /* |
| 327 | * This structure is for use by the xfs_mod_incore_sb_batch() routine. |
| 328 | * xfs_growfs can specify a few fields which are more than int limit |
| 329 | */ |
| 330 | typedef struct xfs_mod_sb { |
| 331 | xfs_sb_field_t msb_field; /* Field to modify, see below */ |
| 332 | int64_t msb_delta; /* Change to make to specified field */ |
| 333 | } xfs_mod_sb_t; |
| 334 | |
| 335 | /* |
| 336 | * Per-ag incore structure, copies of information in agf and agi, to improve the |
| 337 | * performance of allocation group selection. |
| 338 | */ |
| 339 | typedef struct xfs_perag { |
| 340 | struct xfs_mount *pag_mount; /* owner filesystem */ |
| 341 | xfs_agnumber_t pag_agno; /* AG this structure belongs to */ |
| 342 | atomic_t pag_ref; /* perag reference count */ |
| 343 | char pagf_init; /* this agf's entry is initialized */ |
| 344 | char pagi_init; /* this agi's entry is initialized */ |
| 345 | char pagf_metadata; /* the agf is preferred to be metadata */ |
| 346 | char pagi_inodeok; /* The agi is ok for inodes */ |
| 347 | __uint8_t pagf_levels[XFS_BTNUM_AGF]; |
| 348 | /* # of levels in bno & cnt btree */ |
| 349 | __uint32_t pagf_flcount; /* count of blocks in freelist */ |
| 350 | xfs_extlen_t pagf_freeblks; /* total free blocks */ |
| 351 | xfs_extlen_t pagf_longest; /* longest free space */ |
| 352 | __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ |
| 353 | xfs_agino_t pagi_freecount; /* number of free inodes */ |
| 354 | xfs_agino_t pagi_count; /* number of allocated inodes */ |
| 355 | |
| 356 | /* |
| 357 | * Inode allocation search lookup optimisation. |
| 358 | * If the pagino matches, the search for new inodes |
| 359 | * doesn't need to search the near ones again straight away |
| 360 | */ |
| 361 | xfs_agino_t pagl_pagino; |
| 362 | xfs_agino_t pagl_leftrec; |
| 363 | xfs_agino_t pagl_rightrec; |
| 364 | spinlock_t pagb_lock; /* lock for pagb_tree */ |
| 365 | struct rb_root pagb_tree; /* ordered tree of busy extents */ |
| 366 | |
| 367 | atomic_t pagf_fstrms; /* # of filestreams active in this AG */ |
| 368 | |
| 369 | spinlock_t pag_ici_lock; /* incore inode cache lock */ |
| 370 | struct radix_tree_root pag_ici_root; /* incore inode cache root */ |
| 371 | int pag_ici_reclaimable; /* reclaimable inodes */ |
| 372 | struct mutex pag_ici_reclaim_lock; /* serialisation point */ |
| 373 | unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ |
| 374 | |
| 375 | /* buffer cache index */ |
| 376 | spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ |
| 377 | struct rb_root pag_buf_tree; /* ordered tree of active buffers */ |
| 378 | |
| 379 | /* for rcu-safe freeing */ |
| 380 | struct rcu_head rcu_head; |
| 381 | int pagb_count; /* pagb slots in use */ |
| 382 | } xfs_perag_t; |
| 383 | |
| 384 | extern int xfs_log_sbcount(xfs_mount_t *); |
| 385 | extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); |
| 386 | extern int xfs_mountfs(xfs_mount_t *mp); |
| 387 | extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, |
| 388 | xfs_agnumber_t *maxagi); |
| 389 | |
| 390 | extern void xfs_unmountfs(xfs_mount_t *); |
| 391 | extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); |
| 392 | extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, |
| 393 | uint, int); |
| 394 | extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); |
| 395 | extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); |
| 396 | extern int xfs_mount_log_sb(xfs_mount_t *); |
| 397 | extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); |
| 398 | extern int xfs_readsb(xfs_mount_t *, int); |
| 399 | extern void xfs_freesb(xfs_mount_t *); |
| 400 | extern bool xfs_fs_writable(struct xfs_mount *mp, int level); |
| 401 | extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); |
| 402 | |
| 403 | extern int xfs_dev_is_read_only(struct xfs_mount *, char *); |
| 404 | |
| 405 | extern void xfs_set_low_space_thresholds(struct xfs_mount *); |
| 406 | |
| 407 | #endif /* __KERNEL__ */ |
| 408 | |
| 409 | #endif /* __XFS_MOUNT_H__ */ |