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_attrsetm; /* set/create an attribute at mount time */ 38 uint tr_attrsetrt; /* set/create an attribute at runtime */ 39 uint tr_attrrm; /* remove an attribute */ 40 uint tr_clearagi; /* clear bad agi unlinked ino bucket */ 41 uint tr_growrtalloc; /* grow realtime allocations */ 42 uint tr_growrtzero; /* grow realtime zeroing */ 43 uint tr_growrtfree; /* grow realtime freeing */ 44 uint tr_qm_sbchange; /* change quota flags */ 45 uint tr_qm_setqlim; /* adjust quota limits */ 46 uint tr_qm_dqalloc; /* allocate quota on disk */ 47 uint tr_qm_quotaoff; /* turn quota off */ 48 uint tr_qm_equotaoff;/* end of turn quota off */ 49 uint tr_sb; /* modify superblock */ 50 } xfs_trans_reservations_t; 51 52 #ifndef __KERNEL__ 53 54 #define xfs_daddr_to_agno(mp,d) \ 55 ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks)) 56 #define xfs_daddr_to_agbno(mp,d) \ 57 ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks)) 58 59 #else /* __KERNEL__ */ 60 61 struct xlog; 62 struct xfs_inode; 63 struct xfs_mru_cache; 64 struct xfs_nameops; 65 struct xfs_ail; 66 struct xfs_quotainfo; 67 68 #ifdef HAVE_PERCPU_SB 69 70 /* 71 * Valid per-cpu incore superblock counters. Note that if you add new counters, 72 * you may need to define new counter disabled bit field descriptors as there 73 * are more possible fields in the superblock that can fit in a bitfield on a 74 * 32 bit platform. The XFS_SBS_* values for the current current counters just 75 * fit. 76 */ 77 typedef struct xfs_icsb_cnts { 78 uint64_t icsb_fdblocks; 79 uint64_t icsb_ifree; 80 uint64_t icsb_icount; 81 unsigned long icsb_flags; 82 } xfs_icsb_cnts_t; 83 84 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 85 86 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 87 88 extern int xfs_icsb_init_counters(struct xfs_mount *); 89 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 90 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 91 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 92 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 93 extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, 94 int64_t, int); 95 96 #else 97 #define xfs_icsb_init_counters(mp) (0) 98 #define xfs_icsb_destroy_counters(mp) do { } while (0) 99 #define xfs_icsb_reinit_counters(mp) do { } while (0) 100 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 101 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 102 #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ 103 xfs_mod_incore_sb(mp, field, delta, rsvd) 104 #endif 105 106 /* dynamic preallocation free space thresholds, 5% down to 1% */ 107 enum { 108 XFS_LOWSP_1_PCNT = 0, 109 XFS_LOWSP_2_PCNT, 110 XFS_LOWSP_3_PCNT, 111 XFS_LOWSP_4_PCNT, 112 XFS_LOWSP_5_PCNT, 113 XFS_LOWSP_MAX, 114 }; 115 116 typedef struct xfs_mount { 117 struct super_block *m_super; 118 xfs_tid_t m_tid; /* next unused tid for fs */ 119 struct xfs_ail *m_ail; /* fs active log item list */ 120 xfs_sb_t m_sb; /* copy of fs superblock */ 121 spinlock_t m_sb_lock; /* sb counter lock */ 122 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 123 char *m_fsname; /* filesystem name */ 124 int m_fsname_len; /* strlen of fs name */ 125 char *m_rtname; /* realtime device name */ 126 char *m_logname; /* external log device name */ 127 int m_bsize; /* fs logical block size */ 128 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 129 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 130 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 131 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 132 uint m_readio_log; /* min read size log bytes */ 133 uint m_readio_blocks; /* min read size blocks */ 134 uint m_writeio_log; /* min write size log bytes */ 135 uint m_writeio_blocks; /* min write size blocks */ 136 struct xlog *m_log; /* log specific stuff */ 137 int m_logbufs; /* number of log buffers */ 138 int m_logbsize; /* size of each log buffer */ 139 uint m_rsumlevels; /* rt summary levels */ 140 uint m_rsumsize; /* size of rt summary, bytes */ 141 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 142 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 143 struct xfs_inode *m_rootip; /* pointer to root directory */ 144 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 145 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 146 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 147 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 148 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 149 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 150 __uint8_t m_agno_log; /* log #ag's */ 151 __uint8_t m_agino_log; /* #bits for agino in inum */ 152 __uint16_t m_inode_cluster_size;/* min inode buf size */ 153 uint m_blockmask; /* sb_blocksize-1 */ 154 uint m_blockwsize; /* sb_blocksize in words */ 155 uint m_blockwmask; /* blockwsize-1 */ 156 uint m_alloc_mxr[2]; /* max alloc btree records */ 157 uint m_alloc_mnr[2]; /* min alloc btree records */ 158 uint m_bmap_dmxr[2]; /* max bmap btree records */ 159 uint m_bmap_dmnr[2]; /* min bmap btree records */ 160 uint m_inobt_mxr[2]; /* max inobt btree records */ 161 uint m_inobt_mnr[2]; /* min inobt btree records */ 162 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 163 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 164 uint m_in_maxlevels; /* max inobt btree levels. */ 165 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 166 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 167 struct mutex m_growlock; /* growfs mutex */ 168 int m_fixedfsid[2]; /* unchanged for life of FS */ 169 uint m_dmevmask; /* DMI events for this FS */ 170 __uint64_t m_flags; /* global mount flags */ 171 uint m_dir_node_ents; /* #entries in a dir danode */ 172 uint m_attr_node_ents; /* #entries in attr danode */ 173 int m_ialloc_inos; /* inodes in inode allocation */ 174 int m_ialloc_blks; /* blocks in inode allocation */ 175 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 176 uint m_qflags; /* quota status flags */ 177 xfs_trans_reservations_t m_reservations;/* precomputed res values */ 178 __uint64_t m_maxicount; /* maximum inode count */ 179 __uint64_t m_resblks; /* total reserved blocks */ 180 __uint64_t m_resblks_avail;/* available reserved blocks */ 181 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 182 int m_dalign; /* stripe unit */ 183 int m_swidth; /* stripe width */ 184 int m_sinoalign; /* stripe unit inode alignment */ 185 int m_attr_magicpct;/* 37% of the blocksize */ 186 int m_dir_magicpct; /* 37% of the dir blocksize */ 187 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 188 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 189 int m_dirblksize; /* directory block sz--bytes */ 190 int m_dirblkfsbs; /* directory block sz--fsbs */ 191 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ 192 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ 193 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ 194 uint m_chsize; /* size of next field */ 195 struct xfs_chash *m_chash; /* fs private inode per-cluster 196 * hash table */ 197 atomic_t m_active_trans; /* number trans frozen */ 198 #ifdef HAVE_PERCPU_SB 199 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ 200 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 201 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 202 struct mutex m_icsb_mutex; /* balancer sync lock */ 203 #endif 204 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 205 struct delayed_work m_reclaim_work; /* background inode reclaim */ 206 struct delayed_work m_eofblocks_work; /* background eof blocks 207 trimming */ 208 __int64_t m_update_flags; /* sb flags we need to update 209 on the next remount,rw */ 210 int64_t m_low_space[XFS_LOWSP_MAX]; 211 /* low free space thresholds */ 212 213 struct workqueue_struct *m_data_workqueue; 214 struct workqueue_struct *m_unwritten_workqueue; 215 struct workqueue_struct *m_cil_workqueue; 216 struct workqueue_struct *m_reclaim_workqueue; 217 struct workqueue_struct *m_log_workqueue; 218 struct workqueue_struct *m_eofblocks_workqueue; 219 } xfs_mount_t; 220 221 /* 222 * Flags for m_flags. 223 */ 224 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 225 must be synchronous except 226 for space allocations */ 227 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 228 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 229 operations, typically for 230 disk errors in metadata */ 231 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 232 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to 233 user */ 234 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 235 allocations */ 236 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 237 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 238 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 239 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 240 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 241 * 32 bits in size */ 242 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 243 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 244 #define XFS_MOUNT_BARRIER (1ULL << 17) 245 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 246 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 247 * allocation */ 248 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 249 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 250 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 251 * I/O size in stat() */ 252 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 253 allocator */ 254 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 255 256 257 /* 258 * Default minimum read and write sizes. 259 */ 260 #define XFS_READIO_LOG_LARGE 16 261 #define XFS_WRITEIO_LOG_LARGE 16 262 263 /* 264 * Max and min values for mount-option defined I/O 265 * preallocation sizes. 266 */ 267 #define XFS_MAX_IO_LOG 30 /* 1G */ 268 #define XFS_MIN_IO_LOG PAGE_SHIFT 269 270 /* 271 * Synchronous read and write sizes. This should be 272 * better for NFSv2 wsync filesystems. 273 */ 274 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 275 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 276 277 /* 278 * Allow large block sizes to be reported to userspace programs if the 279 * "largeio" mount option is used. 280 * 281 * If compatibility mode is specified, simply return the basic unit of caching 282 * so that we don't get inefficient read/modify/write I/O from user apps. 283 * Otherwise.... 284 * 285 * If the underlying volume is a stripe, then return the stripe width in bytes 286 * as the recommended I/O size. It is not a stripe and we've set a default 287 * buffered I/O size, return that, otherwise return the compat default. 288 */ 289 static inline unsigned long 290 xfs_preferred_iosize(xfs_mount_t *mp) 291 { 292 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 293 return PAGE_CACHE_SIZE; 294 return (mp->m_swidth ? 295 (mp->m_swidth << mp->m_sb.sb_blocklog) : 296 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 297 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 298 PAGE_CACHE_SIZE)); 299 } 300 301 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 302 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 303 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 304 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 305 int lnnum); 306 #define xfs_force_shutdown(m,f) \ 307 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 308 309 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 310 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 311 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 312 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 313 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 314 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 315 316 /* 317 * Flags for xfs_mountfs 318 */ 319 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 320 321 static inline xfs_agnumber_t 322 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 323 { 324 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 325 do_div(ld, mp->m_sb.sb_agblocks); 326 return (xfs_agnumber_t) ld; 327 } 328 329 static inline xfs_agblock_t 330 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 331 { 332 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 333 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 334 } 335 336 /* 337 * perag get/put wrappers for ref counting 338 */ 339 struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno); 340 struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno, 341 int tag); 342 void xfs_perag_put(struct xfs_perag *pag); 343 344 /* 345 * Per-cpu superblock locking functions 346 */ 347 #ifdef HAVE_PERCPU_SB 348 static inline void 349 xfs_icsb_lock(xfs_mount_t *mp) 350 { 351 mutex_lock(&mp->m_icsb_mutex); 352 } 353 354 static inline void 355 xfs_icsb_unlock(xfs_mount_t *mp) 356 { 357 mutex_unlock(&mp->m_icsb_mutex); 358 } 359 #else 360 #define xfs_icsb_lock(mp) 361 #define xfs_icsb_unlock(mp) 362 #endif 363 364 /* 365 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 366 * xfs_growfs can specify a few fields which are more than int limit 367 */ 368 typedef struct xfs_mod_sb { 369 xfs_sb_field_t msb_field; /* Field to modify, see below */ 370 int64_t msb_delta; /* Change to make to specified field */ 371 } xfs_mod_sb_t; 372 373 extern int xfs_log_sbcount(xfs_mount_t *); 374 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 375 extern int xfs_mountfs(xfs_mount_t *mp); 376 377 extern void xfs_unmountfs(xfs_mount_t *); 378 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 379 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 380 uint, int); 381 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 382 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 383 extern int xfs_readsb(xfs_mount_t *, int); 384 extern void xfs_freesb(xfs_mount_t *); 385 extern int xfs_fs_writable(xfs_mount_t *); 386 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 387 388 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 389 390 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 391 392 #endif /* __KERNEL__ */ 393 394 extern void xfs_sb_calc_crc(struct xfs_buf *); 395 extern void xfs_mod_sb(struct xfs_trans *, __int64_t); 396 extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t, 397 xfs_agnumber_t *); 398 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); 399 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); 400 401 extern const struct xfs_buf_ops xfs_sb_buf_ops; 402 403 #endif /* __XFS_MOUNT_H__ */ 404