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 typedef struct xfs_trans_reservations { 22 uint tr_write; /* extent alloc trans */ 23 uint tr_itruncate; /* truncate trans */ 24 uint tr_rename; /* rename trans */ 25 uint tr_link; /* link trans */ 26 uint tr_remove; /* unlink trans */ 27 uint tr_symlink; /* symlink trans */ 28 uint tr_create; /* create trans */ 29 uint tr_mkdir; /* mkdir trans */ 30 uint tr_ifree; /* inode free trans */ 31 uint tr_ichange; /* inode update trans */ 32 uint tr_growdata; /* fs data section grow trans */ 33 uint tr_swrite; /* sync write inode trans */ 34 uint tr_addafork; /* cvt inode to attributed trans */ 35 uint tr_writeid; /* write setuid/setgid file */ 36 uint tr_attrinval; /* attr fork buffer invalidation */ 37 uint tr_attrset; /* set/create an attribute */ 38 uint tr_attrrm; /* remove an attribute */ 39 uint tr_clearagi; /* clear bad agi unlinked ino bucket */ 40 uint tr_growrtalloc; /* grow realtime allocations */ 41 uint tr_growrtzero; /* grow realtime zeroing */ 42 uint tr_growrtfree; /* grow realtime freeing */ 43 } xfs_trans_reservations_t; 44 45 #ifndef __KERNEL__ 46 47 #define xfs_daddr_to_agno(mp,d) \ 48 ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks)) 49 #define xfs_daddr_to_agbno(mp,d) \ 50 ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks)) 51 52 #else /* __KERNEL__ */ 53 54 #include "xfs_sync.h" 55 56 struct cred; 57 struct log; 58 struct xfs_mount_args; 59 struct xfs_inode; 60 struct xfs_bmbt_irec; 61 struct xfs_bmap_free; 62 struct xfs_extdelta; 63 struct xfs_swapext; 64 struct xfs_mru_cache; 65 struct xfs_nameops; 66 struct xfs_ail; 67 struct xfs_quotainfo; 68 69 #ifdef HAVE_PERCPU_SB 70 71 /* 72 * Valid per-cpu incore superblock counters. Note that if you add new counters, 73 * you may need to define new counter disabled bit field descriptors as there 74 * are more possible fields in the superblock that can fit in a bitfield on a 75 * 32 bit platform. The XFS_SBS_* values for the current current counters just 76 * fit. 77 */ 78 typedef struct xfs_icsb_cnts { 79 uint64_t icsb_fdblocks; 80 uint64_t icsb_ifree; 81 uint64_t icsb_icount; 82 unsigned long icsb_flags; 83 } xfs_icsb_cnts_t; 84 85 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 86 87 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 88 89 extern int xfs_icsb_init_counters(struct xfs_mount *); 90 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 91 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 92 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 93 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 94 95 #else 96 #define xfs_icsb_init_counters(mp) (0) 97 #define xfs_icsb_destroy_counters(mp) do { } while (0) 98 #define xfs_icsb_reinit_counters(mp) do { } while (0) 99 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 100 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 101 #endif 102 103 typedef struct xfs_mount { 104 struct super_block *m_super; 105 xfs_tid_t m_tid; /* next unused tid for fs */ 106 struct xfs_ail *m_ail; /* fs active log item list */ 107 xfs_sb_t m_sb; /* copy of fs superblock */ 108 spinlock_t m_sb_lock; /* sb counter lock */ 109 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 110 char *m_fsname; /* filesystem name */ 111 int m_fsname_len; /* strlen of fs name */ 112 char *m_rtname; /* realtime device name */ 113 char *m_logname; /* external log device name */ 114 int m_bsize; /* fs logical block size */ 115 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 116 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 117 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 118 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 119 uint m_readio_log; /* min read size log bytes */ 120 uint m_readio_blocks; /* min read size blocks */ 121 uint m_writeio_log; /* min write size log bytes */ 122 uint m_writeio_blocks; /* min write size blocks */ 123 struct log *m_log; /* log specific stuff */ 124 int m_logbufs; /* number of log buffers */ 125 int m_logbsize; /* size of each log buffer */ 126 uint m_rsumlevels; /* rt summary levels */ 127 uint m_rsumsize; /* size of rt summary, bytes */ 128 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 129 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 130 struct xfs_inode *m_rootip; /* pointer to root directory */ 131 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 132 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 133 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 134 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 135 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 136 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 137 __uint8_t m_agno_log; /* log #ag's */ 138 __uint8_t m_agino_log; /* #bits for agino in inum */ 139 __uint16_t m_inode_cluster_size;/* min inode buf size */ 140 uint m_blockmask; /* sb_blocksize-1 */ 141 uint m_blockwsize; /* sb_blocksize in words */ 142 uint m_blockwmask; /* blockwsize-1 */ 143 uint m_alloc_mxr[2]; /* max alloc btree records */ 144 uint m_alloc_mnr[2]; /* min alloc btree records */ 145 uint m_bmap_dmxr[2]; /* max bmap btree records */ 146 uint m_bmap_dmnr[2]; /* min bmap btree records */ 147 uint m_inobt_mxr[2]; /* max inobt btree records */ 148 uint m_inobt_mnr[2]; /* min inobt btree records */ 149 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 150 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 151 uint m_in_maxlevels; /* max inobt btree levels. */ 152 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 153 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 154 struct mutex m_growlock; /* growfs mutex */ 155 int m_fixedfsid[2]; /* unchanged for life of FS */ 156 uint m_dmevmask; /* DMI events for this FS */ 157 __uint64_t m_flags; /* global mount flags */ 158 uint m_dir_node_ents; /* #entries in a dir danode */ 159 uint m_attr_node_ents; /* #entries in attr danode */ 160 int m_ialloc_inos; /* inodes in inode allocation */ 161 int m_ialloc_blks; /* blocks in inode allocation */ 162 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 163 uint m_qflags; /* quota status flags */ 164 xfs_trans_reservations_t m_reservations;/* precomputed res values */ 165 __uint64_t m_maxicount; /* maximum inode count */ 166 __uint64_t m_maxioffset; /* maximum inode offset */ 167 __uint64_t m_resblks; /* total reserved blocks */ 168 __uint64_t m_resblks_avail;/* available reserved blocks */ 169 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 170 int m_dalign; /* stripe unit */ 171 int m_swidth; /* stripe width */ 172 int m_sinoalign; /* stripe unit inode alignment */ 173 int m_attr_magicpct;/* 37% of the blocksize */ 174 int m_dir_magicpct; /* 37% of the dir blocksize */ 175 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 176 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 177 int m_dirblksize; /* directory block sz--bytes */ 178 int m_dirblkfsbs; /* directory block sz--fsbs */ 179 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ 180 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ 181 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ 182 uint m_chsize; /* size of next field */ 183 struct xfs_chash *m_chash; /* fs private inode per-cluster 184 * hash table */ 185 atomic_t m_active_trans; /* number trans frozen */ 186 #ifdef HAVE_PERCPU_SB 187 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ 188 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 189 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 190 struct mutex m_icsb_mutex; /* balancer sync lock */ 191 #endif 192 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 193 struct task_struct *m_sync_task; /* generalised sync thread */ 194 xfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */ 195 struct list_head m_sync_list; /* sync thread work item list */ 196 spinlock_t m_sync_lock; /* work item list lock */ 197 int m_sync_seq; /* sync thread generation no. */ 198 wait_queue_head_t m_wait_single_sync_task; 199 __int64_t m_update_flags; /* sb flags we need to update 200 on the next remount,rw */ 201 struct shrinker m_inode_shrink; /* inode reclaim shrinker */ 202 } xfs_mount_t; 203 204 /* 205 * Flags for m_flags. 206 */ 207 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 208 must be synchronous except 209 for space allocations */ 210 #define XFS_MOUNT_DELAYLOG (1ULL << 1) /* delayed logging is enabled */ 211 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 212 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 213 operations, typically for 214 disk errors in metadata */ 215 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to 216 user */ 217 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 218 allocations */ 219 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 220 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 221 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 222 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 223 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 224 * 32 bits in size */ 225 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 226 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 227 #define XFS_MOUNT_BARRIER (1ULL << 17) 228 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 229 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 230 * allocation */ 231 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 232 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 233 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 234 * I/O size in stat() */ 235 #define XFS_MOUNT_NO_PERCPU_SB (1ULL << 23) /* don't use per-cpu superblock 236 counters */ 237 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 238 allocator */ 239 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 240 241 242 /* 243 * Default minimum read and write sizes. 244 */ 245 #define XFS_READIO_LOG_LARGE 16 246 #define XFS_WRITEIO_LOG_LARGE 16 247 248 /* 249 * Max and min values for mount-option defined I/O 250 * preallocation sizes. 251 */ 252 #define XFS_MAX_IO_LOG 30 /* 1G */ 253 #define XFS_MIN_IO_LOG PAGE_SHIFT 254 255 /* 256 * Synchronous read and write sizes. This should be 257 * better for NFSv2 wsync filesystems. 258 */ 259 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 260 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 261 262 /* 263 * Allow large block sizes to be reported to userspace programs if the 264 * "largeio" mount option is used. 265 * 266 * If compatibility mode is specified, simply return the basic unit of caching 267 * so that we don't get inefficient read/modify/write I/O from user apps. 268 * Otherwise.... 269 * 270 * If the underlying volume is a stripe, then return the stripe width in bytes 271 * as the recommended I/O size. It is not a stripe and we've set a default 272 * buffered I/O size, return that, otherwise return the compat default. 273 */ 274 static inline unsigned long 275 xfs_preferred_iosize(xfs_mount_t *mp) 276 { 277 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 278 return PAGE_CACHE_SIZE; 279 return (mp->m_swidth ? 280 (mp->m_swidth << mp->m_sb.sb_blocklog) : 281 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 282 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 283 PAGE_CACHE_SIZE)); 284 } 285 286 #define XFS_MAXIOFFSET(mp) ((mp)->m_maxioffset) 287 288 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 289 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 290 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 291 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 292 int lnnum); 293 #define xfs_force_shutdown(m,f) \ 294 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 295 296 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 297 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 298 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 299 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 300 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 301 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 302 303 #define xfs_test_for_freeze(mp) ((mp)->m_super->s_frozen) 304 #define xfs_wait_for_freeze(mp,l) vfs_check_frozen((mp)->m_super, (l)) 305 306 /* 307 * Flags for xfs_mountfs 308 */ 309 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 310 311 static inline xfs_agnumber_t 312 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 313 { 314 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 315 do_div(ld, mp->m_sb.sb_agblocks); 316 return (xfs_agnumber_t) ld; 317 } 318 319 static inline xfs_agblock_t 320 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 321 { 322 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 323 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 324 } 325 326 /* 327 * perag get/put wrappers for ref counting 328 */ 329 struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno); 330 void xfs_perag_put(struct xfs_perag *pag); 331 332 /* 333 * Per-cpu superblock locking functions 334 */ 335 #ifdef HAVE_PERCPU_SB 336 static inline void 337 xfs_icsb_lock(xfs_mount_t *mp) 338 { 339 mutex_lock(&mp->m_icsb_mutex); 340 } 341 342 static inline void 343 xfs_icsb_unlock(xfs_mount_t *mp) 344 { 345 mutex_unlock(&mp->m_icsb_mutex); 346 } 347 #else 348 #define xfs_icsb_lock(mp) 349 #define xfs_icsb_unlock(mp) 350 #endif 351 352 /* 353 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 354 * xfs_growfs can specify a few fields which are more than int limit 355 */ 356 typedef struct xfs_mod_sb { 357 xfs_sb_field_t msb_field; /* Field to modify, see below */ 358 int64_t msb_delta; /* Change to make to specified field */ 359 } xfs_mod_sb_t; 360 361 extern int xfs_log_sbcount(xfs_mount_t *, uint); 362 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 363 extern int xfs_mountfs(xfs_mount_t *mp); 364 365 extern void xfs_unmountfs(xfs_mount_t *); 366 extern int xfs_unmountfs_writesb(xfs_mount_t *); 367 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 368 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 369 uint, int); 370 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 371 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 372 extern int xfs_readsb(xfs_mount_t *, int); 373 extern void xfs_freesb(xfs_mount_t *); 374 extern int xfs_fs_writable(xfs_mount_t *); 375 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 376 377 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 378 379 #endif /* __KERNEL__ */ 380 381 extern void xfs_mod_sb(struct xfs_trans *, __int64_t); 382 extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t, 383 xfs_agnumber_t *); 384 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); 385 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); 386 387 #endif /* __XFS_MOUNT_H__ */ 388