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 __int64_t m_update_flags; /* sb flags we need to update 166 on the next remount,rw */ 167 int64_t m_low_space[XFS_LOWSP_MAX]; 168 /* low free space thresholds */ 169 struct xfs_kobj m_kobj; 170 171 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 } xfs_mount_t; 178 179 /* 180 * Flags for m_flags. 181 */ 182 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 183 must be synchronous except 184 for space allocations */ 185 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 186 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 187 operations, typically for 188 disk errors in metadata */ 189 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 190 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 191 allocations */ 192 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 193 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 194 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 195 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 196 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 197 * 32 bits in size */ 198 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 199 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 200 #define XFS_MOUNT_BARRIER (1ULL << 17) 201 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 202 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 203 * allocation */ 204 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 205 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 206 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 207 * I/O size in stat() */ 208 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 209 allocator */ 210 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 211 212 213 /* 214 * Default minimum read and write sizes. 215 */ 216 #define XFS_READIO_LOG_LARGE 16 217 #define XFS_WRITEIO_LOG_LARGE 16 218 219 /* 220 * Max and min values for mount-option defined I/O 221 * preallocation sizes. 222 */ 223 #define XFS_MAX_IO_LOG 30 /* 1G */ 224 #define XFS_MIN_IO_LOG PAGE_SHIFT 225 226 /* 227 * Synchronous read and write sizes. This should be 228 * better for NFSv2 wsync filesystems. 229 */ 230 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 231 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 232 233 /* 234 * Allow large block sizes to be reported to userspace programs if the 235 * "largeio" mount option is used. 236 * 237 * If compatibility mode is specified, simply return the basic unit of caching 238 * so that we don't get inefficient read/modify/write I/O from user apps. 239 * Otherwise.... 240 * 241 * If the underlying volume is a stripe, then return the stripe width in bytes 242 * as the recommended I/O size. It is not a stripe and we've set a default 243 * buffered I/O size, return that, otherwise return the compat default. 244 */ 245 static inline unsigned long 246 xfs_preferred_iosize(xfs_mount_t *mp) 247 { 248 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 249 return PAGE_CACHE_SIZE; 250 return (mp->m_swidth ? 251 (mp->m_swidth << mp->m_sb.sb_blocklog) : 252 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 253 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 254 PAGE_CACHE_SIZE)); 255 } 256 257 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 258 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 259 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 260 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 261 int lnnum); 262 #define xfs_force_shutdown(m,f) \ 263 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 264 265 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 266 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 267 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 268 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 269 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 270 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 271 272 /* 273 * Flags for xfs_mountfs 274 */ 275 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 276 277 static inline xfs_agnumber_t 278 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 279 { 280 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 281 do_div(ld, mp->m_sb.sb_agblocks); 282 return (xfs_agnumber_t) ld; 283 } 284 285 static inline xfs_agblock_t 286 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 287 { 288 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 289 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 290 } 291 292 /* 293 * Per-cpu superblock locking functions 294 */ 295 #ifdef HAVE_PERCPU_SB 296 static inline void 297 xfs_icsb_lock(xfs_mount_t *mp) 298 { 299 mutex_lock(&mp->m_icsb_mutex); 300 } 301 302 static inline void 303 xfs_icsb_unlock(xfs_mount_t *mp) 304 { 305 mutex_unlock(&mp->m_icsb_mutex); 306 } 307 #else 308 #define xfs_icsb_lock(mp) 309 #define xfs_icsb_unlock(mp) 310 #endif 311 312 /* 313 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 314 * xfs_growfs can specify a few fields which are more than int limit 315 */ 316 typedef struct xfs_mod_sb { 317 xfs_sb_field_t msb_field; /* Field to modify, see below */ 318 int64_t msb_delta; /* Change to make to specified field */ 319 } xfs_mod_sb_t; 320 321 /* 322 * Per-ag incore structure, copies of information in agf and agi, to improve the 323 * performance of allocation group selection. This is defined for the kernel 324 * only, and hence is defined here instead of in xfs_ag.h. You need the struct 325 * xfs_mount to be defined to look up a xfs_perag anyway (via mp->m_perag_tree), 326 * so this doesn't introduce any strange header file dependencies. 327 */ 328 typedef struct xfs_perag { 329 struct xfs_mount *pag_mount; /* owner filesystem */ 330 xfs_agnumber_t pag_agno; /* AG this structure belongs to */ 331 atomic_t pag_ref; /* perag reference count */ 332 char pagf_init; /* this agf's entry is initialized */ 333 char pagi_init; /* this agi's entry is initialized */ 334 char pagf_metadata; /* the agf is preferred to be metadata */ 335 char pagi_inodeok; /* The agi is ok for inodes */ 336 __uint8_t pagf_levels[XFS_BTNUM_AGF]; 337 /* # of levels in bno & cnt btree */ 338 __uint32_t pagf_flcount; /* count of blocks in freelist */ 339 xfs_extlen_t pagf_freeblks; /* total free blocks */ 340 xfs_extlen_t pagf_longest; /* longest free space */ 341 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ 342 xfs_agino_t pagi_freecount; /* number of free inodes */ 343 xfs_agino_t pagi_count; /* number of allocated inodes */ 344 345 /* 346 * Inode allocation search lookup optimisation. 347 * If the pagino matches, the search for new inodes 348 * doesn't need to search the near ones again straight away 349 */ 350 xfs_agino_t pagl_pagino; 351 xfs_agino_t pagl_leftrec; 352 xfs_agino_t pagl_rightrec; 353 spinlock_t pagb_lock; /* lock for pagb_tree */ 354 struct rb_root pagb_tree; /* ordered tree of busy extents */ 355 356 atomic_t pagf_fstrms; /* # of filestreams active in this AG */ 357 358 spinlock_t pag_ici_lock; /* incore inode cache lock */ 359 struct radix_tree_root pag_ici_root; /* incore inode cache root */ 360 int pag_ici_reclaimable; /* reclaimable inodes */ 361 struct mutex pag_ici_reclaim_lock; /* serialisation point */ 362 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ 363 364 /* buffer cache index */ 365 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ 366 struct rb_root pag_buf_tree; /* ordered tree of active buffers */ 367 368 /* for rcu-safe freeing */ 369 struct rcu_head rcu_head; 370 int pagb_count; /* pagb slots in use */ 371 } xfs_perag_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 extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, 377 xfs_agnumber_t *maxagi); 378 379 extern void xfs_unmountfs(xfs_mount_t *); 380 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 381 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 382 uint, int); 383 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 384 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 385 extern int xfs_readsb(xfs_mount_t *, int); 386 extern void xfs_freesb(xfs_mount_t *); 387 extern int xfs_fs_writable(xfs_mount_t *); 388 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 389 390 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 391 392 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 393 394 #endif /* __KERNEL__ */ 395 396 #endif /* __XFS_MOUNT_H__ */ 397