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 uint64_t icsb_icount; 45 unsigned long icsb_flags; 46 } xfs_icsb_cnts_t; 47 48 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 49 50 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 51 52 extern int xfs_icsb_init_counters(struct xfs_mount *); 53 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 54 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 55 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 56 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 57 extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, 58 int64_t, int); 59 60 #else 61 #define xfs_icsb_init_counters(mp) (0) 62 #define xfs_icsb_destroy_counters(mp) do { } while (0) 63 #define xfs_icsb_reinit_counters(mp) do { } while (0) 64 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 65 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 66 #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ 67 xfs_mod_incore_sb(mp, field, delta, rsvd) 68 #endif 69 70 /* dynamic preallocation free space thresholds, 5% down to 1% */ 71 enum { 72 XFS_LOWSP_1_PCNT = 0, 73 XFS_LOWSP_2_PCNT, 74 XFS_LOWSP_3_PCNT, 75 XFS_LOWSP_4_PCNT, 76 XFS_LOWSP_5_PCNT, 77 XFS_LOWSP_MAX, 78 }; 79 80 typedef struct xfs_mount { 81 struct super_block *m_super; 82 xfs_tid_t m_tid; /* next unused tid for fs */ 83 struct xfs_ail *m_ail; /* fs active log item list */ 84 xfs_sb_t m_sb; /* copy of fs superblock */ 85 spinlock_t m_sb_lock; /* sb counter lock */ 86 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 87 char *m_fsname; /* filesystem name */ 88 int m_fsname_len; /* strlen of fs name */ 89 char *m_rtname; /* realtime device name */ 90 char *m_logname; /* external log device name */ 91 int m_bsize; /* fs logical block size */ 92 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 93 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 94 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 95 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 96 uint m_readio_log; /* min read size log bytes */ 97 uint m_readio_blocks; /* min read size blocks */ 98 uint m_writeio_log; /* min write size log bytes */ 99 uint m_writeio_blocks; /* min write size blocks */ 100 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ 101 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ 102 struct xlog *m_log; /* log specific stuff */ 103 int m_logbufs; /* number of log buffers */ 104 int m_logbsize; /* size of each log buffer */ 105 uint m_rsumlevels; /* rt summary levels */ 106 uint m_rsumsize; /* size of rt summary, bytes */ 107 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 108 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 109 struct xfs_inode *m_rootip; /* pointer to root directory */ 110 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 111 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 112 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 113 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 114 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 115 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 116 __uint8_t m_agno_log; /* log #ag's */ 117 __uint8_t m_agino_log; /* #bits for agino in inum */ 118 uint m_inode_cluster_size;/* min inode buf size */ 119 uint m_blockmask; /* sb_blocksize-1 */ 120 uint m_blockwsize; /* sb_blocksize in words */ 121 uint m_blockwmask; /* blockwsize-1 */ 122 uint m_alloc_mxr[2]; /* max alloc btree records */ 123 uint m_alloc_mnr[2]; /* min alloc btree records */ 124 uint m_bmap_dmxr[2]; /* max bmap btree records */ 125 uint m_bmap_dmnr[2]; /* min bmap btree records */ 126 uint m_inobt_mxr[2]; /* max inobt btree records */ 127 uint m_inobt_mnr[2]; /* min inobt btree records */ 128 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 129 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 130 uint m_in_maxlevels; /* max inobt btree levels. */ 131 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 132 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 133 struct mutex m_growlock; /* growfs mutex */ 134 int m_fixedfsid[2]; /* unchanged for life of FS */ 135 uint m_dmevmask; /* DMI events for this FS */ 136 __uint64_t m_flags; /* global mount flags */ 137 int m_ialloc_inos; /* inodes in inode allocation */ 138 int m_ialloc_blks; /* blocks in inode allocation */ 139 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 140 uint m_qflags; /* quota status flags */ 141 struct xfs_trans_resv m_resv; /* precomputed res values */ 142 __uint64_t m_maxicount; /* maximum inode count */ 143 __uint64_t m_resblks; /* total reserved blocks */ 144 __uint64_t m_resblks_avail;/* available reserved blocks */ 145 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 146 int m_dalign; /* stripe unit */ 147 int m_swidth; /* stripe width */ 148 int m_sinoalign; /* stripe unit inode alignment */ 149 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 150 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 151 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ 152 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ 153 uint m_chsize; /* size of next field */ 154 atomic_t m_active_trans; /* number trans frozen */ 155 #ifdef HAVE_PERCPU_SB 156 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ 157 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 158 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 159 struct mutex m_icsb_mutex; /* balancer sync lock */ 160 #endif 161 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 162 struct delayed_work m_reclaim_work; /* background inode reclaim */ 163 struct delayed_work m_eofblocks_work; /* background eof blocks 164 trimming */ 165 bool m_update_sb; /* sb needs update in mount */ 166 int64_t m_low_space[XFS_LOWSP_MAX]; 167 /* low free space thresholds */ 168 struct xfs_kobj m_kobj; 169 170 struct workqueue_struct *m_buf_workqueue; 171 struct workqueue_struct *m_data_workqueue; 172 struct workqueue_struct *m_unwritten_workqueue; 173 struct workqueue_struct *m_cil_workqueue; 174 struct workqueue_struct *m_reclaim_workqueue; 175 struct workqueue_struct *m_log_workqueue; 176 struct workqueue_struct *m_eofblocks_workqueue; 177 178 /* 179 * Generation of the filesysyem layout. This is incremented by each 180 * growfs, and used by the pNFS server to ensure the client updates 181 * its view of the block device once it gets a layout that might 182 * reference the newly added blocks. Does not need to be persistent 183 * as long as we only allow file system size increments, but if we 184 * ever support shrinks it would have to be persisted in addition 185 * to various other kinds of pain inflicted on the pNFS server. 186 */ 187 __uint32_t m_generation; 188 } xfs_mount_t; 189 190 /* 191 * Flags for m_flags. 192 */ 193 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 194 must be synchronous except 195 for space allocations */ 196 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 197 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 198 operations, typically for 199 disk errors in metadata */ 200 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 201 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 202 allocations */ 203 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 204 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 205 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 206 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 207 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 208 * 32 bits in size */ 209 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 210 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 211 #define XFS_MOUNT_BARRIER (1ULL << 17) 212 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 213 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 214 * allocation */ 215 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 216 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 217 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 218 * I/O size in stat() */ 219 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 220 allocator */ 221 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 222 223 224 /* 225 * Default minimum read and write sizes. 226 */ 227 #define XFS_READIO_LOG_LARGE 16 228 #define XFS_WRITEIO_LOG_LARGE 16 229 230 /* 231 * Max and min values for mount-option defined I/O 232 * preallocation sizes. 233 */ 234 #define XFS_MAX_IO_LOG 30 /* 1G */ 235 #define XFS_MIN_IO_LOG PAGE_SHIFT 236 237 /* 238 * Synchronous read and write sizes. This should be 239 * better for NFSv2 wsync filesystems. 240 */ 241 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 242 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 243 244 /* 245 * Allow large block sizes to be reported to userspace programs if the 246 * "largeio" mount option is used. 247 * 248 * If compatibility mode is specified, simply return the basic unit of caching 249 * so that we don't get inefficient read/modify/write I/O from user apps. 250 * Otherwise.... 251 * 252 * If the underlying volume is a stripe, then return the stripe width in bytes 253 * as the recommended I/O size. It is not a stripe and we've set a default 254 * buffered I/O size, return that, otherwise return the compat default. 255 */ 256 static inline unsigned long 257 xfs_preferred_iosize(xfs_mount_t *mp) 258 { 259 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 260 return PAGE_CACHE_SIZE; 261 return (mp->m_swidth ? 262 (mp->m_swidth << mp->m_sb.sb_blocklog) : 263 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 264 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 265 PAGE_CACHE_SIZE)); 266 } 267 268 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 269 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 270 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 271 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 272 int lnnum); 273 #define xfs_force_shutdown(m,f) \ 274 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 275 276 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 277 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 278 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 279 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 280 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 281 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 282 283 /* 284 * Flags for xfs_mountfs 285 */ 286 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 287 288 static inline xfs_agnumber_t 289 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 290 { 291 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 292 do_div(ld, mp->m_sb.sb_agblocks); 293 return (xfs_agnumber_t) ld; 294 } 295 296 static inline xfs_agblock_t 297 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 298 { 299 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 300 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 301 } 302 303 /* 304 * Per-cpu superblock locking functions 305 */ 306 #ifdef HAVE_PERCPU_SB 307 static inline void 308 xfs_icsb_lock(xfs_mount_t *mp) 309 { 310 mutex_lock(&mp->m_icsb_mutex); 311 } 312 313 static inline void 314 xfs_icsb_unlock(xfs_mount_t *mp) 315 { 316 mutex_unlock(&mp->m_icsb_mutex); 317 } 318 #else 319 #define xfs_icsb_lock(mp) 320 #define xfs_icsb_unlock(mp) 321 #endif 322 323 /* 324 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 325 * xfs_growfs can specify a few fields which are more than int limit 326 */ 327 typedef struct xfs_mod_sb { 328 xfs_sb_field_t msb_field; /* Field to modify, see below */ 329 int64_t msb_delta; /* Change to make to specified field */ 330 } xfs_mod_sb_t; 331 332 /* 333 * Per-ag incore structure, copies of information in agf and agi, to improve the 334 * performance of allocation group selection. 335 */ 336 typedef struct xfs_perag { 337 struct xfs_mount *pag_mount; /* owner filesystem */ 338 xfs_agnumber_t pag_agno; /* AG this structure belongs to */ 339 atomic_t pag_ref; /* perag reference count */ 340 char pagf_init; /* this agf's entry is initialized */ 341 char pagi_init; /* this agi's entry is initialized */ 342 char pagf_metadata; /* the agf is preferred to be metadata */ 343 char pagi_inodeok; /* The agi is ok for inodes */ 344 __uint8_t pagf_levels[XFS_BTNUM_AGF]; 345 /* # of levels in bno & cnt btree */ 346 __uint32_t pagf_flcount; /* count of blocks in freelist */ 347 xfs_extlen_t pagf_freeblks; /* total free blocks */ 348 xfs_extlen_t pagf_longest; /* longest free space */ 349 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ 350 xfs_agino_t pagi_freecount; /* number of free inodes */ 351 xfs_agino_t pagi_count; /* number of allocated inodes */ 352 353 /* 354 * Inode allocation search lookup optimisation. 355 * If the pagino matches, the search for new inodes 356 * doesn't need to search the near ones again straight away 357 */ 358 xfs_agino_t pagl_pagino; 359 xfs_agino_t pagl_leftrec; 360 xfs_agino_t pagl_rightrec; 361 spinlock_t pagb_lock; /* lock for pagb_tree */ 362 struct rb_root pagb_tree; /* ordered tree of busy extents */ 363 364 atomic_t pagf_fstrms; /* # of filestreams active in this AG */ 365 366 spinlock_t pag_ici_lock; /* incore inode cache lock */ 367 struct radix_tree_root pag_ici_root; /* incore inode cache root */ 368 int pag_ici_reclaimable; /* reclaimable inodes */ 369 struct mutex pag_ici_reclaim_lock; /* serialisation point */ 370 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ 371 372 /* buffer cache index */ 373 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ 374 struct rb_root pag_buf_tree; /* ordered tree of active buffers */ 375 376 /* for rcu-safe freeing */ 377 struct rcu_head rcu_head; 378 int pagb_count; /* pagb slots in use */ 379 } xfs_perag_t; 380 381 extern int xfs_log_sbcount(xfs_mount_t *); 382 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 383 extern int xfs_mountfs(xfs_mount_t *mp); 384 extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, 385 xfs_agnumber_t *maxagi); 386 387 extern void xfs_unmountfs(xfs_mount_t *); 388 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 389 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 390 uint, int); 391 extern int xfs_mount_log_sb(xfs_mount_t *); 392 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 393 extern int xfs_readsb(xfs_mount_t *, int); 394 extern void xfs_freesb(xfs_mount_t *); 395 extern bool xfs_fs_writable(struct xfs_mount *mp, int level); 396 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 397 398 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 399 400 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 401 402 #endif /* __KERNEL__ */ 403 404 #endif /* __XFS_MOUNT_H__ */ 405