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_attrset; /* set/create an attribute */ 38 uint tr_attrrm; /* remove an attribute */ 39 uint tr_clearagi; /* clear bad agi unlinked ino bucket */ 40 uint tr_growrtalloc; /* grow realtime allocations */ 41 uint tr_growrtzero; /* grow realtime zeroing */ 42 uint tr_growrtfree; /* grow realtime freeing */ 43 } xfs_trans_reservations_t; 44 45 #ifndef __KERNEL__ 46 47 #define xfs_daddr_to_agno(mp,d) \ 48 ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks)) 49 #define xfs_daddr_to_agbno(mp,d) \ 50 ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks)) 51 52 #else /* __KERNEL__ */ 53 54 #include "xfs_sync.h" 55 56 struct cred; 57 struct log; 58 struct xfs_mount_args; 59 struct xfs_inode; 60 struct xfs_bmbt_irec; 61 struct xfs_bmap_free; 62 struct xfs_extdelta; 63 struct xfs_swapext; 64 struct xfs_mru_cache; 65 struct xfs_nameops; 66 struct xfs_ail; 67 struct xfs_quotainfo; 68 69 70 /* 71 * Prototypes and functions for the Data Migration subsystem. 72 */ 73 74 typedef int (*xfs_send_data_t)(int, struct xfs_inode *, 75 xfs_off_t, size_t, int, int *); 76 typedef int (*xfs_send_mmap_t)(struct vm_area_struct *, uint); 77 typedef int (*xfs_send_destroy_t)(struct xfs_inode *, dm_right_t); 78 typedef int (*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *, 79 struct xfs_inode *, dm_right_t, 80 struct xfs_inode *, dm_right_t, 81 const char *, const char *, mode_t, int, int); 82 typedef int (*xfs_send_mount_t)(struct xfs_mount *, dm_right_t, 83 char *, char *); 84 typedef void (*xfs_send_unmount_t)(struct xfs_mount *, struct xfs_inode *, 85 dm_right_t, mode_t, int, int); 86 87 typedef struct xfs_dmops { 88 xfs_send_data_t xfs_send_data; 89 xfs_send_mmap_t xfs_send_mmap; 90 xfs_send_destroy_t xfs_send_destroy; 91 xfs_send_namesp_t xfs_send_namesp; 92 xfs_send_mount_t xfs_send_mount; 93 xfs_send_unmount_t xfs_send_unmount; 94 } xfs_dmops_t; 95 96 #define XFS_SEND_DATA(mp, ev,ip,off,len,fl,lock) \ 97 (*(mp)->m_dm_ops->xfs_send_data)(ev,ip,off,len,fl,lock) 98 #define XFS_SEND_MMAP(mp, vma,fl) \ 99 (*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl) 100 #define XFS_SEND_DESTROY(mp, ip,right) \ 101 (*(mp)->m_dm_ops->xfs_send_destroy)(ip,right) 102 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \ 103 (*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl) 104 #define XFS_SEND_PREUNMOUNT(mp,b1,r1,b2,r2,n1,n2,mode,rval,fl) \ 105 (*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT,mp,b1,r1,b2,r2,n1,n2,mode,rval,fl) 106 #define XFS_SEND_MOUNT(mp,right,path,name) \ 107 (*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name) 108 #define XFS_SEND_UNMOUNT(mp, ip,right,mode,rval,fl) \ 109 (*(mp)->m_dm_ops->xfs_send_unmount)(mp,ip,right,mode,rval,fl) 110 111 112 #ifdef HAVE_PERCPU_SB 113 114 /* 115 * Valid per-cpu incore superblock counters. Note that if you add new counters, 116 * you may need to define new counter disabled bit field descriptors as there 117 * are more possible fields in the superblock that can fit in a bitfield on a 118 * 32 bit platform. The XFS_SBS_* values for the current current counters just 119 * fit. 120 */ 121 typedef struct xfs_icsb_cnts { 122 uint64_t icsb_fdblocks; 123 uint64_t icsb_ifree; 124 uint64_t icsb_icount; 125 unsigned long icsb_flags; 126 } xfs_icsb_cnts_t; 127 128 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 129 130 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 131 132 extern int xfs_icsb_init_counters(struct xfs_mount *); 133 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 134 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 135 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 136 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 137 138 #else 139 #define xfs_icsb_init_counters(mp) (0) 140 #define xfs_icsb_destroy_counters(mp) do { } while (0) 141 #define xfs_icsb_reinit_counters(mp) do { } while (0) 142 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 143 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 144 #endif 145 146 typedef struct xfs_mount { 147 struct super_block *m_super; 148 xfs_tid_t m_tid; /* next unused tid for fs */ 149 struct xfs_ail *m_ail; /* fs active log item list */ 150 xfs_sb_t m_sb; /* copy of fs superblock */ 151 spinlock_t m_sb_lock; /* sb counter lock */ 152 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 153 char *m_fsname; /* filesystem name */ 154 int m_fsname_len; /* strlen of fs name */ 155 char *m_rtname; /* realtime device name */ 156 char *m_logname; /* external log device name */ 157 int m_bsize; /* fs logical block size */ 158 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 159 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 160 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 161 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 162 uint m_readio_log; /* min read size log bytes */ 163 uint m_readio_blocks; /* min read size blocks */ 164 uint m_writeio_log; /* min write size log bytes */ 165 uint m_writeio_blocks; /* min write size blocks */ 166 struct log *m_log; /* log specific stuff */ 167 int m_logbufs; /* number of log buffers */ 168 int m_logbsize; /* size of each log buffer */ 169 uint m_rsumlevels; /* rt summary levels */ 170 uint m_rsumsize; /* size of rt summary, bytes */ 171 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 172 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 173 struct xfs_inode *m_rootip; /* pointer to root directory */ 174 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 175 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 176 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 177 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 178 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 179 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 180 __uint8_t m_agno_log; /* log #ag's */ 181 __uint8_t m_agino_log; /* #bits for agino in inum */ 182 __uint16_t m_inode_cluster_size;/* min inode buf size */ 183 uint m_blockmask; /* sb_blocksize-1 */ 184 uint m_blockwsize; /* sb_blocksize in words */ 185 uint m_blockwmask; /* blockwsize-1 */ 186 uint m_alloc_mxr[2]; /* max alloc btree records */ 187 uint m_alloc_mnr[2]; /* min alloc btree records */ 188 uint m_bmap_dmxr[2]; /* max bmap btree records */ 189 uint m_bmap_dmnr[2]; /* min bmap btree records */ 190 uint m_inobt_mxr[2]; /* max inobt btree records */ 191 uint m_inobt_mnr[2]; /* min inobt btree records */ 192 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 193 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 194 uint m_in_maxlevels; /* max inobt btree levels. */ 195 struct xfs_perag *m_perag; /* per-ag accounting info */ 196 struct rw_semaphore m_peraglock; /* lock for m_perag (pointer) */ 197 struct mutex m_growlock; /* growfs mutex */ 198 int m_fixedfsid[2]; /* unchanged for life of FS */ 199 uint m_dmevmask; /* DMI events for this FS */ 200 __uint64_t m_flags; /* global mount flags */ 201 uint m_dir_node_ents; /* #entries in a dir danode */ 202 uint m_attr_node_ents; /* #entries in attr danode */ 203 int m_ialloc_inos; /* inodes in inode allocation */ 204 int m_ialloc_blks; /* blocks in inode allocation */ 205 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 206 uint m_qflags; /* quota status flags */ 207 xfs_trans_reservations_t m_reservations;/* precomputed res values */ 208 __uint64_t m_maxicount; /* maximum inode count */ 209 __uint64_t m_maxioffset; /* maximum inode offset */ 210 __uint64_t m_resblks; /* total reserved blocks */ 211 __uint64_t m_resblks_avail;/* available reserved blocks */ 212 int m_dalign; /* stripe unit */ 213 int m_swidth; /* stripe width */ 214 int m_sinoalign; /* stripe unit inode alignment */ 215 int m_attr_magicpct;/* 37% of the blocksize */ 216 int m_dir_magicpct; /* 37% of the dir blocksize */ 217 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 218 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 219 int m_dirblksize; /* directory block sz--bytes */ 220 int m_dirblkfsbs; /* directory block sz--fsbs */ 221 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ 222 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ 223 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ 224 uint m_chsize; /* size of next field */ 225 struct xfs_chash *m_chash; /* fs private inode per-cluster 226 * hash table */ 227 struct xfs_dmops *m_dm_ops; /* vector of DMI ops */ 228 struct xfs_qmops *m_qm_ops; /* vector of XQM ops */ 229 atomic_t m_active_trans; /* number trans frozen */ 230 #ifdef HAVE_PERCPU_SB 231 xfs_icsb_cnts_t *m_sb_cnts; /* per-cpu superblock counters */ 232 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 233 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 234 struct mutex m_icsb_mutex; /* balancer sync lock */ 235 #endif 236 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 237 struct task_struct *m_sync_task; /* generalised sync thread */ 238 xfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */ 239 struct list_head m_sync_list; /* sync thread work item list */ 240 spinlock_t m_sync_lock; /* work item list lock */ 241 int m_sync_seq; /* sync thread generation no. */ 242 wait_queue_head_t m_wait_single_sync_task; 243 __int64_t m_update_flags; /* sb flags we need to update 244 on the next remount,rw */ 245 } xfs_mount_t; 246 247 /* 248 * Flags for m_flags. 249 */ 250 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 251 must be synchronous except 252 for space allocations */ 253 #define XFS_MOUNT_DMAPI (1ULL << 2) /* dmapi is enabled */ 254 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 255 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 256 operations, typically for 257 disk errors in metadata */ 258 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to 259 user */ 260 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 261 allocations */ 262 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 263 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 264 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 265 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 266 #define XFS_MOUNT_OSYNCISOSYNC (1ULL << 13) /* o_sync is REALLY o_sync */ 267 /* osyncisdsync is now default*/ 268 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 269 * 32 bits in size */ 270 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 271 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 272 #define XFS_MOUNT_BARRIER (1ULL << 17) 273 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 274 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 275 * allocation */ 276 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 277 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 278 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 279 * I/O size in stat() */ 280 #define XFS_MOUNT_NO_PERCPU_SB (1ULL << 23) /* don't use per-cpu superblock 281 counters */ 282 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 283 allocator */ 284 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 285 286 287 /* 288 * Default minimum read and write sizes. 289 */ 290 #define XFS_READIO_LOG_LARGE 16 291 #define XFS_WRITEIO_LOG_LARGE 16 292 293 /* 294 * Max and min values for mount-option defined I/O 295 * preallocation sizes. 296 */ 297 #define XFS_MAX_IO_LOG 30 /* 1G */ 298 #define XFS_MIN_IO_LOG PAGE_SHIFT 299 300 /* 301 * Synchronous read and write sizes. This should be 302 * better for NFSv2 wsync filesystems. 303 */ 304 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 305 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 306 307 /* 308 * Allow large block sizes to be reported to userspace programs if the 309 * "largeio" mount option is used. 310 * 311 * If compatibility mode is specified, simply return the basic unit of caching 312 * so that we don't get inefficient read/modify/write I/O from user apps. 313 * Otherwise.... 314 * 315 * If the underlying volume is a stripe, then return the stripe width in bytes 316 * as the recommended I/O size. It is not a stripe and we've set a default 317 * buffered I/O size, return that, otherwise return the compat default. 318 */ 319 static inline unsigned long 320 xfs_preferred_iosize(xfs_mount_t *mp) 321 { 322 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 323 return PAGE_CACHE_SIZE; 324 return (mp->m_swidth ? 325 (mp->m_swidth << mp->m_sb.sb_blocklog) : 326 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 327 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 328 PAGE_CACHE_SIZE)); 329 } 330 331 #define XFS_MAXIOFFSET(mp) ((mp)->m_maxioffset) 332 333 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 334 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 335 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 336 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 337 int lnnum); 338 #define xfs_force_shutdown(m,f) \ 339 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 340 341 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 342 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 343 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 344 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 345 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 346 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 347 348 #define xfs_test_for_freeze(mp) ((mp)->m_super->s_frozen) 349 #define xfs_wait_for_freeze(mp,l) vfs_check_frozen((mp)->m_super, (l)) 350 351 /* 352 * Flags for xfs_mountfs 353 */ 354 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 355 356 static inline xfs_agnumber_t 357 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 358 { 359 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 360 do_div(ld, mp->m_sb.sb_agblocks); 361 return (xfs_agnumber_t) ld; 362 } 363 364 static inline xfs_agblock_t 365 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 366 { 367 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 368 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 369 } 370 371 /* 372 * perag get/put wrappers for eventual ref counting 373 */ 374 static inline xfs_perag_t * 375 xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino) 376 { 377 return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)]; 378 } 379 380 static inline void 381 xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag) 382 { 383 /* nothing to see here, move along */ 384 } 385 386 /* 387 * Per-cpu superblock locking functions 388 */ 389 #ifdef HAVE_PERCPU_SB 390 STATIC_INLINE void 391 xfs_icsb_lock(xfs_mount_t *mp) 392 { 393 mutex_lock(&mp->m_icsb_mutex); 394 } 395 396 STATIC_INLINE void 397 xfs_icsb_unlock(xfs_mount_t *mp) 398 { 399 mutex_unlock(&mp->m_icsb_mutex); 400 } 401 #else 402 #define xfs_icsb_lock(mp) 403 #define xfs_icsb_unlock(mp) 404 #endif 405 406 /* 407 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 408 * xfs_growfs can specify a few fields which are more than int limit 409 */ 410 typedef struct xfs_mod_sb { 411 xfs_sb_field_t msb_field; /* Field to modify, see below */ 412 int64_t msb_delta; /* Change to make to specified field */ 413 } xfs_mod_sb_t; 414 415 extern int xfs_log_sbcount(xfs_mount_t *, uint); 416 extern int xfs_mountfs(xfs_mount_t *mp); 417 418 extern void xfs_unmountfs(xfs_mount_t *); 419 extern int xfs_unmountfs_writesb(xfs_mount_t *); 420 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 421 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 422 uint, int); 423 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 424 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 425 extern int xfs_readsb(xfs_mount_t *, int); 426 extern void xfs_freesb(xfs_mount_t *); 427 extern int xfs_fs_writable(xfs_mount_t *); 428 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 429 430 extern int xfs_dmops_get(struct xfs_mount *); 431 extern void xfs_dmops_put(struct xfs_mount *); 432 433 extern struct xfs_dmops xfs_dmcore_xfs; 434 435 #endif /* __KERNEL__ */ 436 437 extern void xfs_mod_sb(struct xfs_trans *, __int64_t); 438 extern xfs_agnumber_t xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t); 439 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); 440 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); 441 442 #endif /* __XFS_MOUNT_H__ */ 443