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 30 #ifdef HAVE_PERCPU_SB 31 32 /* 33 * Valid per-cpu incore superblock counters. Note that if you add new counters, 34 * you may need to define new counter disabled bit field descriptors as there 35 * are more possible fields in the superblock that can fit in a bitfield on a 36 * 32 bit platform. The XFS_SBS_* values for the current current counters just 37 * fit. 38 */ 39 typedef struct xfs_icsb_cnts { 40 uint64_t icsb_fdblocks; 41 uint64_t icsb_ifree; 42 uint64_t icsb_icount; 43 unsigned long icsb_flags; 44 } xfs_icsb_cnts_t; 45 46 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 47 48 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 49 50 extern int xfs_icsb_init_counters(struct xfs_mount *); 51 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 52 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 53 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 54 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 55 extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, 56 int64_t, int); 57 58 #else 59 #define xfs_icsb_init_counters(mp) (0) 60 #define xfs_icsb_destroy_counters(mp) do { } while (0) 61 #define xfs_icsb_reinit_counters(mp) do { } while (0) 62 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 63 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 64 #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ 65 xfs_mod_incore_sb(mp, field, delta, rsvd) 66 #endif 67 68 /* dynamic preallocation free space thresholds, 5% down to 1% */ 69 enum { 70 XFS_LOWSP_1_PCNT = 0, 71 XFS_LOWSP_2_PCNT, 72 XFS_LOWSP_3_PCNT, 73 XFS_LOWSP_4_PCNT, 74 XFS_LOWSP_5_PCNT, 75 XFS_LOWSP_MAX, 76 }; 77 78 typedef struct xfs_mount { 79 struct super_block *m_super; 80 xfs_tid_t m_tid; /* next unused tid for fs */ 81 struct xfs_ail *m_ail; /* fs active log item list */ 82 xfs_sb_t m_sb; /* copy of fs superblock */ 83 spinlock_t m_sb_lock; /* sb counter lock */ 84 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 85 char *m_fsname; /* filesystem name */ 86 int m_fsname_len; /* strlen of fs name */ 87 char *m_rtname; /* realtime device name */ 88 char *m_logname; /* external log device name */ 89 int m_bsize; /* fs logical block size */ 90 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 91 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 92 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 93 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 94 uint m_readio_log; /* min read size log bytes */ 95 uint m_readio_blocks; /* min read size blocks */ 96 uint m_writeio_log; /* min write size log bytes */ 97 uint m_writeio_blocks; /* min write size blocks */ 98 struct xlog *m_log; /* log specific stuff */ 99 int m_logbufs; /* number of log buffers */ 100 int m_logbsize; /* size of each log buffer */ 101 uint m_rsumlevels; /* rt summary levels */ 102 uint m_rsumsize; /* size of rt summary, bytes */ 103 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 104 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 105 struct xfs_inode *m_rootip; /* pointer to root directory */ 106 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 107 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 108 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 109 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 110 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 111 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 112 __uint8_t m_agno_log; /* log #ag's */ 113 __uint8_t m_agino_log; /* #bits for agino in inum */ 114 __uint16_t m_inode_cluster_size;/* min inode buf size */ 115 uint m_blockmask; /* sb_blocksize-1 */ 116 uint m_blockwsize; /* sb_blocksize in words */ 117 uint m_blockwmask; /* blockwsize-1 */ 118 uint m_alloc_mxr[2]; /* max alloc btree records */ 119 uint m_alloc_mnr[2]; /* min alloc btree records */ 120 uint m_bmap_dmxr[2]; /* max bmap btree records */ 121 uint m_bmap_dmnr[2]; /* min bmap btree records */ 122 uint m_inobt_mxr[2]; /* max inobt btree records */ 123 uint m_inobt_mnr[2]; /* min inobt btree records */ 124 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 125 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 126 uint m_in_maxlevels; /* max inobt btree levels. */ 127 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 128 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 129 struct mutex m_growlock; /* growfs mutex */ 130 int m_fixedfsid[2]; /* unchanged for life of FS */ 131 uint m_dmevmask; /* DMI events for this FS */ 132 __uint64_t m_flags; /* global mount flags */ 133 uint m_dir_node_ents; /* #entries in a dir danode */ 134 uint m_attr_node_ents; /* #entries in attr danode */ 135 int m_ialloc_inos; /* inodes in inode allocation */ 136 int m_ialloc_blks; /* blocks in inode allocation */ 137 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 138 uint m_qflags; /* quota status flags */ 139 struct xfs_trans_resv m_resv; /* precomputed res values */ 140 __uint64_t m_maxicount; /* maximum inode count */ 141 __uint64_t m_resblks; /* total reserved blocks */ 142 __uint64_t m_resblks_avail;/* available reserved blocks */ 143 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 144 int m_dalign; /* stripe unit */ 145 int m_swidth; /* stripe width */ 146 int m_sinoalign; /* stripe unit inode alignment */ 147 int m_attr_magicpct;/* 37% of the blocksize */ 148 int m_dir_magicpct; /* 37% of the dir blocksize */ 149 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 150 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 151 int m_dirblksize; /* directory block sz--bytes */ 152 int m_dirblkfsbs; /* directory block sz--fsbs */ 153 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ 154 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ 155 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ 156 uint m_chsize; /* size of next field */ 157 atomic_t m_active_trans; /* number trans frozen */ 158 #ifdef HAVE_PERCPU_SB 159 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ 160 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 161 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 162 struct mutex m_icsb_mutex; /* balancer sync lock */ 163 #endif 164 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 165 struct delayed_work m_reclaim_work; /* background inode reclaim */ 166 struct delayed_work m_eofblocks_work; /* background eof blocks 167 trimming */ 168 __int64_t m_update_flags; /* sb flags we need to update 169 on the next remount,rw */ 170 int64_t m_low_space[XFS_LOWSP_MAX]; 171 /* low free space thresholds */ 172 173 struct workqueue_struct *m_data_workqueue; 174 struct workqueue_struct *m_unwritten_workqueue; 175 struct workqueue_struct *m_cil_workqueue; 176 struct workqueue_struct *m_reclaim_workqueue; 177 struct workqueue_struct *m_log_workqueue; 178 struct workqueue_struct *m_eofblocks_workqueue; 179 } xfs_mount_t; 180 181 /* 182 * Flags for m_flags. 183 */ 184 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 185 must be synchronous except 186 for space allocations */ 187 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 188 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 189 operations, typically for 190 disk errors in metadata */ 191 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 192 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 193 allocations */ 194 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 195 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 196 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 197 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 198 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 199 * 32 bits in size */ 200 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 201 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 202 #define XFS_MOUNT_BARRIER (1ULL << 17) 203 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 204 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 205 * allocation */ 206 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 207 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 208 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 209 * I/O size in stat() */ 210 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 211 allocator */ 212 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 213 214 215 /* 216 * Default minimum read and write sizes. 217 */ 218 #define XFS_READIO_LOG_LARGE 16 219 #define XFS_WRITEIO_LOG_LARGE 16 220 221 /* 222 * Max and min values for mount-option defined I/O 223 * preallocation sizes. 224 */ 225 #define XFS_MAX_IO_LOG 30 /* 1G */ 226 #define XFS_MIN_IO_LOG PAGE_SHIFT 227 228 /* 229 * Synchronous read and write sizes. This should be 230 * better for NFSv2 wsync filesystems. 231 */ 232 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 233 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 234 235 /* 236 * Allow large block sizes to be reported to userspace programs if the 237 * "largeio" mount option is used. 238 * 239 * If compatibility mode is specified, simply return the basic unit of caching 240 * so that we don't get inefficient read/modify/write I/O from user apps. 241 * Otherwise.... 242 * 243 * If the underlying volume is a stripe, then return the stripe width in bytes 244 * as the recommended I/O size. It is not a stripe and we've set a default 245 * buffered I/O size, return that, otherwise return the compat default. 246 */ 247 static inline unsigned long 248 xfs_preferred_iosize(xfs_mount_t *mp) 249 { 250 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 251 return PAGE_CACHE_SIZE; 252 return (mp->m_swidth ? 253 (mp->m_swidth << mp->m_sb.sb_blocklog) : 254 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 255 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 256 PAGE_CACHE_SIZE)); 257 } 258 259 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 260 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 261 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 262 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 263 int lnnum); 264 #define xfs_force_shutdown(m,f) \ 265 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 266 267 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 268 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 269 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 270 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 271 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 272 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 273 274 /* 275 * Flags for xfs_mountfs 276 */ 277 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 278 279 static inline xfs_agnumber_t 280 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 281 { 282 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 283 do_div(ld, mp->m_sb.sb_agblocks); 284 return (xfs_agnumber_t) ld; 285 } 286 287 static inline xfs_agblock_t 288 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 289 { 290 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 291 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 292 } 293 294 /* 295 * Per-cpu superblock locking functions 296 */ 297 #ifdef HAVE_PERCPU_SB 298 static inline void 299 xfs_icsb_lock(xfs_mount_t *mp) 300 { 301 mutex_lock(&mp->m_icsb_mutex); 302 } 303 304 static inline void 305 xfs_icsb_unlock(xfs_mount_t *mp) 306 { 307 mutex_unlock(&mp->m_icsb_mutex); 308 } 309 #else 310 #define xfs_icsb_lock(mp) 311 #define xfs_icsb_unlock(mp) 312 #endif 313 314 /* 315 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 316 * xfs_growfs can specify a few fields which are more than int limit 317 */ 318 typedef struct xfs_mod_sb { 319 xfs_sb_field_t msb_field; /* Field to modify, see below */ 320 int64_t msb_delta; /* Change to make to specified field */ 321 } xfs_mod_sb_t; 322 323 /* 324 * Per-ag incore structure, copies of information in agf and agi, to improve the 325 * performance of allocation group selection. This is defined for the kernel 326 * only, and hence is defined here instead of in xfs_ag.h. You need the struct 327 * xfs_mount to be defined to look up a xfs_perag anyway (via mp->m_perag_tree), 328 * so this doesn't introduce any strange header file dependencies. 329 */ 330 typedef struct xfs_perag { 331 struct xfs_mount *pag_mount; /* owner filesystem */ 332 xfs_agnumber_t pag_agno; /* AG this structure belongs to */ 333 atomic_t pag_ref; /* perag reference count */ 334 char pagf_init; /* this agf's entry is initialized */ 335 char pagi_init; /* this agi's entry is initialized */ 336 char pagf_metadata; /* the agf is preferred to be metadata */ 337 char pagi_inodeok; /* The agi is ok for inodes */ 338 __uint8_t pagf_levels[XFS_BTNUM_AGF]; 339 /* # of levels in bno & cnt btree */ 340 __uint32_t pagf_flcount; /* count of blocks in freelist */ 341 xfs_extlen_t pagf_freeblks; /* total free blocks */ 342 xfs_extlen_t pagf_longest; /* longest free space */ 343 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ 344 xfs_agino_t pagi_freecount; /* number of free inodes */ 345 xfs_agino_t pagi_count; /* number of allocated inodes */ 346 347 /* 348 * Inode allocation search lookup optimisation. 349 * If the pagino matches, the search for new inodes 350 * doesn't need to search the near ones again straight away 351 */ 352 xfs_agino_t pagl_pagino; 353 xfs_agino_t pagl_leftrec; 354 xfs_agino_t pagl_rightrec; 355 spinlock_t pagb_lock; /* lock for pagb_tree */ 356 struct rb_root pagb_tree; /* ordered tree of busy extents */ 357 358 atomic_t pagf_fstrms; /* # of filestreams active in this AG */ 359 360 spinlock_t pag_ici_lock; /* incore inode cache lock */ 361 struct radix_tree_root pag_ici_root; /* incore inode cache root */ 362 int pag_ici_reclaimable; /* reclaimable inodes */ 363 struct mutex pag_ici_reclaim_lock; /* serialisation point */ 364 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ 365 366 /* buffer cache index */ 367 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */ 368 struct rb_root pag_buf_tree; /* ordered tree of active buffers */ 369 370 /* for rcu-safe freeing */ 371 struct rcu_head rcu_head; 372 int pagb_count; /* pagb slots in use */ 373 } xfs_perag_t; 374 375 extern int xfs_log_sbcount(xfs_mount_t *); 376 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp); 377 extern int xfs_mountfs(xfs_mount_t *mp); 378 extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, 379 xfs_agnumber_t *maxagi); 380 381 extern void xfs_unmountfs(xfs_mount_t *); 382 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 383 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 384 uint, int); 385 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 386 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 387 extern int xfs_readsb(xfs_mount_t *, int); 388 extern void xfs_freesb(xfs_mount_t *); 389 extern int xfs_fs_writable(xfs_mount_t *); 390 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 391 392 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 393 394 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 395 396 #endif /* __KERNEL__ */ 397 398 #endif /* __XFS_MOUNT_H__ */ 399