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 atomic_t m_active_trans; /* number trans frozen */ 196 #ifdef HAVE_PERCPU_SB 197 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ 198 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 199 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 200 struct mutex m_icsb_mutex; /* balancer sync lock */ 201 #endif 202 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 203 struct delayed_work m_reclaim_work; /* background inode reclaim */ 204 struct delayed_work m_eofblocks_work; /* background eof blocks 205 trimming */ 206 __int64_t m_update_flags; /* sb flags we need to update 207 on the next remount,rw */ 208 int64_t m_low_space[XFS_LOWSP_MAX]; 209 /* low free space thresholds */ 210 211 struct workqueue_struct *m_data_workqueue; 212 struct workqueue_struct *m_unwritten_workqueue; 213 struct workqueue_struct *m_cil_workqueue; 214 struct workqueue_struct *m_reclaim_workqueue; 215 struct workqueue_struct *m_log_workqueue; 216 struct workqueue_struct *m_eofblocks_workqueue; 217 } xfs_mount_t; 218 219 /* 220 * Flags for m_flags. 221 */ 222 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 223 must be synchronous except 224 for space allocations */ 225 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 226 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 227 operations, typically for 228 disk errors in metadata */ 229 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 230 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 231 allocations */ 232 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 233 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 234 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 235 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 236 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 237 * 32 bits in size */ 238 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 239 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 240 #define XFS_MOUNT_BARRIER (1ULL << 17) 241 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 242 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 243 * allocation */ 244 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 245 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 246 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 247 * I/O size in stat() */ 248 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 249 allocator */ 250 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 251 252 253 /* 254 * Default minimum read and write sizes. 255 */ 256 #define XFS_READIO_LOG_LARGE 16 257 #define XFS_WRITEIO_LOG_LARGE 16 258 259 /* 260 * Max and min values for mount-option defined I/O 261 * preallocation sizes. 262 */ 263 #define XFS_MAX_IO_LOG 30 /* 1G */ 264 #define XFS_MIN_IO_LOG PAGE_SHIFT 265 266 /* 267 * Synchronous read and write sizes. This should be 268 * better for NFSv2 wsync filesystems. 269 */ 270 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 271 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 272 273 /* 274 * Allow large block sizes to be reported to userspace programs if the 275 * "largeio" mount option is used. 276 * 277 * If compatibility mode is specified, simply return the basic unit of caching 278 * so that we don't get inefficient read/modify/write I/O from user apps. 279 * Otherwise.... 280 * 281 * If the underlying volume is a stripe, then return the stripe width in bytes 282 * as the recommended I/O size. It is not a stripe and we've set a default 283 * buffered I/O size, return that, otherwise return the compat default. 284 */ 285 static inline unsigned long 286 xfs_preferred_iosize(xfs_mount_t *mp) 287 { 288 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 289 return PAGE_CACHE_SIZE; 290 return (mp->m_swidth ? 291 (mp->m_swidth << mp->m_sb.sb_blocklog) : 292 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 293 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 294 PAGE_CACHE_SIZE)); 295 } 296 297 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 298 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 299 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 300 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 301 int lnnum); 302 #define xfs_force_shutdown(m,f) \ 303 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 304 305 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 306 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 307 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 308 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 309 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 310 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 311 312 /* 313 * Flags for xfs_mountfs 314 */ 315 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 316 317 static inline xfs_agnumber_t 318 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 319 { 320 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 321 do_div(ld, mp->m_sb.sb_agblocks); 322 return (xfs_agnumber_t) ld; 323 } 324 325 static inline xfs_agblock_t 326 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 327 { 328 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 329 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 330 } 331 332 /* 333 * perag get/put wrappers for ref counting 334 */ 335 struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno); 336 struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno, 337 int tag); 338 void xfs_perag_put(struct xfs_perag *pag); 339 340 /* 341 * Per-cpu superblock locking functions 342 */ 343 #ifdef HAVE_PERCPU_SB 344 static inline void 345 xfs_icsb_lock(xfs_mount_t *mp) 346 { 347 mutex_lock(&mp->m_icsb_mutex); 348 } 349 350 static inline void 351 xfs_icsb_unlock(xfs_mount_t *mp) 352 { 353 mutex_unlock(&mp->m_icsb_mutex); 354 } 355 #else 356 #define xfs_icsb_lock(mp) 357 #define xfs_icsb_unlock(mp) 358 #endif 359 360 /* 361 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 362 * xfs_growfs can specify a few fields which are more than int limit 363 */ 364 typedef struct xfs_mod_sb { 365 xfs_sb_field_t msb_field; /* Field to modify, see below */ 366 int64_t msb_delta; /* Change to make to specified field */ 367 } xfs_mod_sb_t; 368 369 extern int xfs_log_sbcount(xfs_mount_t *); 370 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 371 extern int xfs_mountfs(xfs_mount_t *mp); 372 373 extern void xfs_unmountfs(xfs_mount_t *); 374 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 375 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 376 uint, int); 377 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 378 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 379 extern int xfs_readsb(xfs_mount_t *, int); 380 extern void xfs_freesb(xfs_mount_t *); 381 extern int xfs_fs_writable(xfs_mount_t *); 382 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 383 384 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 385 386 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 387 388 #endif /* __KERNEL__ */ 389 390 extern void xfs_sb_calc_crc(struct xfs_buf *); 391 extern void xfs_mod_sb(struct xfs_trans *, __int64_t); 392 extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t, 393 xfs_agnumber_t *); 394 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); 395 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); 396 397 extern const struct xfs_buf_ops xfs_sb_buf_ops; 398 399 #endif /* __XFS_MOUNT_H__ */ 400