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 31 #ifdef HAVE_PERCPU_SB 32 33 /* 34 * Valid per-cpu incore superblock counters. Note that if you add new counters, 35 * you may need to define new counter disabled bit field descriptors as there 36 * are more possible fields in the superblock that can fit in a bitfield on a 37 * 32 bit platform. The XFS_SBS_* values for the current current counters just 38 * fit. 39 */ 40 typedef struct xfs_icsb_cnts { 41 uint64_t icsb_fdblocks; 42 uint64_t icsb_ifree; 43 uint64_t icsb_icount; 44 unsigned long icsb_flags; 45 } xfs_icsb_cnts_t; 46 47 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 48 49 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 50 51 extern int xfs_icsb_init_counters(struct xfs_mount *); 52 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 53 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 54 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 55 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 56 extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, 57 int64_t, int); 58 59 #else 60 #define xfs_icsb_init_counters(mp) (0) 61 #define xfs_icsb_destroy_counters(mp) do { } while (0) 62 #define xfs_icsb_reinit_counters(mp) do { } while (0) 63 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 64 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 65 #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ 66 xfs_mod_incore_sb(mp, field, delta, rsvd) 67 #endif 68 69 /* dynamic preallocation free space thresholds, 5% down to 1% */ 70 enum { 71 XFS_LOWSP_1_PCNT = 0, 72 XFS_LOWSP_2_PCNT, 73 XFS_LOWSP_3_PCNT, 74 XFS_LOWSP_4_PCNT, 75 XFS_LOWSP_5_PCNT, 76 XFS_LOWSP_MAX, 77 }; 78 79 typedef struct xfs_mount { 80 struct super_block *m_super; 81 xfs_tid_t m_tid; /* next unused tid for fs */ 82 struct xfs_ail *m_ail; /* fs active log item list */ 83 xfs_sb_t m_sb; /* copy of fs superblock */ 84 spinlock_t m_sb_lock; /* sb counter lock */ 85 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 86 char *m_fsname; /* filesystem name */ 87 int m_fsname_len; /* strlen of fs name */ 88 char *m_rtname; /* realtime device name */ 89 char *m_logname; /* external log device name */ 90 int m_bsize; /* fs logical block size */ 91 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 92 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 93 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 94 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 95 uint m_readio_log; /* min read size log bytes */ 96 uint m_readio_blocks; /* min read size blocks */ 97 uint m_writeio_log; /* min write size log bytes */ 98 uint m_writeio_blocks; /* min write size blocks */ 99 struct xlog *m_log; /* log specific stuff */ 100 int m_logbufs; /* number of log buffers */ 101 int m_logbsize; /* size of each log buffer */ 102 uint m_rsumlevels; /* rt summary levels */ 103 uint m_rsumsize; /* size of rt summary, bytes */ 104 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 105 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 106 struct xfs_inode *m_rootip; /* pointer to root directory */ 107 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 108 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 109 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 110 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 111 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 112 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 113 __uint8_t m_agno_log; /* log #ag's */ 114 __uint8_t m_agino_log; /* #bits for agino in inum */ 115 uint m_inode_cluster_size;/* min inode buf size */ 116 uint m_blockmask; /* sb_blocksize-1 */ 117 uint m_blockwsize; /* sb_blocksize in words */ 118 uint m_blockwmask; /* blockwsize-1 */ 119 uint m_alloc_mxr[2]; /* max alloc btree records */ 120 uint m_alloc_mnr[2]; /* min alloc btree records */ 121 uint m_bmap_dmxr[2]; /* max bmap btree records */ 122 uint m_bmap_dmnr[2]; /* min bmap btree records */ 123 uint m_inobt_mxr[2]; /* max inobt btree records */ 124 uint m_inobt_mnr[2]; /* min inobt btree records */ 125 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 126 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 127 uint m_in_maxlevels; /* max inobt btree levels. */ 128 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 129 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 130 struct mutex m_growlock; /* growfs mutex */ 131 int m_fixedfsid[2]; /* unchanged for life of FS */ 132 uint m_dmevmask; /* DMI events for this FS */ 133 __uint64_t m_flags; /* global mount flags */ 134 uint m_dir_node_ents; /* #entries in a dir danode */ 135 uint m_attr_node_ents; /* #entries in attr danode */ 136 int m_ialloc_inos; /* inodes in inode allocation */ 137 int m_ialloc_blks; /* blocks in inode allocation */ 138 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 139 uint m_qflags; /* quota status flags */ 140 struct xfs_trans_resv m_resv; /* precomputed res values */ 141 __uint64_t m_maxicount; /* maximum inode count */ 142 __uint64_t m_resblks; /* total reserved blocks */ 143 __uint64_t m_resblks_avail;/* available reserved blocks */ 144 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 145 int m_dalign; /* stripe unit */ 146 int m_swidth; /* stripe width */ 147 int m_sinoalign; /* stripe unit inode alignment */ 148 int m_attr_magicpct;/* 37% of the blocksize */ 149 int m_dir_magicpct; /* 37% of the dir blocksize */ 150 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 151 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 152 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ 153 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ 154 int m_dirblksize; /* directory block sz--bytes */ 155 int m_dirblkfsbs; /* directory block sz--fsbs */ 156 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ 157 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ 158 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ 159 uint m_chsize; /* size of next field */ 160 atomic_t m_active_trans; /* number trans frozen */ 161 #ifdef HAVE_PERCPU_SB 162 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ 163 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 164 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 165 struct mutex m_icsb_mutex; /* balancer sync lock */ 166 #endif 167 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 168 struct delayed_work m_reclaim_work; /* background inode reclaim */ 169 struct delayed_work m_eofblocks_work; /* background eof blocks 170 trimming */ 171 __int64_t m_update_flags; /* sb flags we need to update 172 on the next remount,rw */ 173 int64_t m_low_space[XFS_LOWSP_MAX]; 174 /* low free space thresholds */ 175 176 struct workqueue_struct *m_data_workqueue; 177 struct workqueue_struct *m_unwritten_workqueue; 178 struct workqueue_struct *m_cil_workqueue; 179 struct workqueue_struct *m_reclaim_workqueue; 180 struct workqueue_struct *m_log_workqueue; 181 struct workqueue_struct *m_eofblocks_workqueue; 182 } xfs_mount_t; 183 184 /* 185 * Flags for m_flags. 186 */ 187 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 188 must be synchronous except 189 for space allocations */ 190 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 191 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 192 operations, typically for 193 disk errors in metadata */ 194 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 195 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 196 allocations */ 197 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 198 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 199 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 200 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 201 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 202 * 32 bits in size */ 203 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 204 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 205 #define XFS_MOUNT_BARRIER (1ULL << 17) 206 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 207 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 208 * allocation */ 209 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 210 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 211 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 212 * I/O size in stat() */ 213 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 214 allocator */ 215 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 216 217 218 /* 219 * Default minimum read and write sizes. 220 */ 221 #define XFS_READIO_LOG_LARGE 16 222 #define XFS_WRITEIO_LOG_LARGE 16 223 224 /* 225 * Max and min values for mount-option defined I/O 226 * preallocation sizes. 227 */ 228 #define XFS_MAX_IO_LOG 30 /* 1G */ 229 #define XFS_MIN_IO_LOG PAGE_SHIFT 230 231 /* 232 * Synchronous read and write sizes. This should be 233 * better for NFSv2 wsync filesystems. 234 */ 235 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 236 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 237 238 /* 239 * Allow large block sizes to be reported to userspace programs if the 240 * "largeio" mount option is used. 241 * 242 * If compatibility mode is specified, simply return the basic unit of caching 243 * so that we don't get inefficient read/modify/write I/O from user apps. 244 * Otherwise.... 245 * 246 * If the underlying volume is a stripe, then return the stripe width in bytes 247 * as the recommended I/O size. It is not a stripe and we've set a default 248 * buffered I/O size, return that, otherwise return the compat default. 249 */ 250 static inline unsigned long 251 xfs_preferred_iosize(xfs_mount_t *mp) 252 { 253 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 254 return PAGE_CACHE_SIZE; 255 return (mp->m_swidth ? 256 (mp->m_swidth << mp->m_sb.sb_blocklog) : 257 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 258 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 259 PAGE_CACHE_SIZE)); 260 } 261 262 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 263 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 264 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 265 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 266 int lnnum); 267 #define xfs_force_shutdown(m,f) \ 268 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 269 270 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 271 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 272 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 273 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 274 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 275 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 276 277 /* 278 * Flags for xfs_mountfs 279 */ 280 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 281 282 static inline xfs_agnumber_t 283 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 284 { 285 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 286 do_div(ld, mp->m_sb.sb_agblocks); 287 return (xfs_agnumber_t) ld; 288 } 289 290 static inline xfs_agblock_t 291 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 292 { 293 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 294 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 295 } 296 297 /* 298 * Per-cpu superblock locking functions 299 */ 300 #ifdef HAVE_PERCPU_SB 301 static inline void 302 xfs_icsb_lock(xfs_mount_t *mp) 303 { 304 mutex_lock(&mp->m_icsb_mutex); 305 } 306 307 static inline void 308 xfs_icsb_unlock(xfs_mount_t *mp) 309 { 310 mutex_unlock(&mp->m_icsb_mutex); 311 } 312 #else 313 #define xfs_icsb_lock(mp) 314 #define xfs_icsb_unlock(mp) 315 #endif 316 317 /* 318 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 319 * xfs_growfs can specify a few fields which are more than int limit 320 */ 321 typedef struct xfs_mod_sb { 322 xfs_sb_field_t msb_field; /* Field to modify, see below */ 323 int64_t msb_delta; /* Change to make to specified field */ 324 } xfs_mod_sb_t; 325 326 /* 327 * Per-ag incore structure, copies of information in agf and agi, to improve the 328 * performance of allocation group selection. This is defined for the kernel 329 * only, and hence is defined here instead of in xfs_ag.h. You need the struct 330 * xfs_mount to be defined to look up a xfs_perag anyway (via mp->m_perag_tree), 331 * so this doesn't introduce any strange header file dependencies. 332 */ 333 typedef struct xfs_perag { 334 struct xfs_mount *pag_mount; /* owner filesystem */ 335 xfs_agnumber_t pag_agno; /* AG this structure belongs to */ 336 atomic_t pag_ref; /* perag reference count */ 337 char pagf_init; /* this agf's entry is initialized */ 338 char pagi_init; /* this agi's entry is initialized */ 339 char pagf_metadata; /* the agf is preferred to be metadata */ 340 char pagi_inodeok; /* The agi is ok for inodes */ 341 __uint8_t pagf_levels[XFS_BTNUM_AGF]; 342 /* # of levels in bno & cnt btree */ 343 __uint32_t pagf_flcount; /* count of blocks in freelist */ 344 xfs_extlen_t pagf_freeblks; /* total free blocks */ 345 xfs_extlen_t pagf_longest; /* longest free space */ 346 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ 347 xfs_agino_t pagi_freecount; /* number of free inodes */ 348 xfs_agino_t pagi_count; /* number of allocated inodes */ 349 350 /* 351 * Inode allocation search lookup optimisation. 352 * If the pagino matches, the search for new inodes 353 * doesn't need to search the near ones again straight away 354 */ 355 xfs_agino_t pagl_pagino; 356 xfs_agino_t pagl_leftrec; 357 xfs_agino_t pagl_rightrec; 358 spinlock_t pagb_lock; /* lock for pagb_tree */ 359 struct rb_root pagb_tree; /* ordered tree of busy extents */ 360 361 atomic_t pagf_fstrms; /* # of filestreams active in this AG */ 362 363 spinlock_t pag_ici_lock; /* incore inode cache lock */ 364 struct radix_tree_root pag_ici_root; /* incore inode cache root */ 365 int pag_ici_reclaimable; /* reclaimable inodes */ 366 struct mutex pag_ici_reclaim_lock; /* serialisation point */ 367 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ 368 369 /* buffer cache index */ 370 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ 371 struct rb_root pag_buf_tree; /* ordered tree of active buffers */ 372 373 /* for rcu-safe freeing */ 374 struct rcu_head rcu_head; 375 int pagb_count; /* pagb slots in use */ 376 } xfs_perag_t; 377 378 extern int xfs_log_sbcount(xfs_mount_t *); 379 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 380 extern int xfs_mountfs(xfs_mount_t *mp); 381 extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, 382 xfs_agnumber_t *maxagi); 383 384 extern void xfs_unmountfs(xfs_mount_t *); 385 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 386 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 387 uint, int); 388 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 389 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 390 extern int xfs_readsb(xfs_mount_t *, int); 391 extern void xfs_freesb(xfs_mount_t *); 392 extern int xfs_fs_writable(xfs_mount_t *); 393 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 394 395 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 396 397 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 398 399 #endif /* __KERNEL__ */ 400 401 #endif /* __XFS_MOUNT_H__ */ 402