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_DMAPI_UNMOUNT_FLAGS(mp) \ 97 (((mp)->m_dmevmask & (1 << DM_EVENT_UNMOUNT)) ? 0 : DM_FLAGS_UNWANTED) 98 99 #define XFS_SEND_DATA(mp, ev,ip,off,len,fl,lock) \ 100 (*(mp)->m_dm_ops->xfs_send_data)(ev,ip,off,len,fl,lock) 101 #define XFS_SEND_MMAP(mp, vma,fl) \ 102 (*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl) 103 #define XFS_SEND_DESTROY(mp, ip,right) \ 104 (*(mp)->m_dm_ops->xfs_send_destroy)(ip,right) 105 #define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \ 106 (*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl) 107 #define XFS_SEND_MOUNT(mp,right,path,name) \ 108 (*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name) 109 #define XFS_SEND_PREUNMOUNT(mp) \ 110 do { \ 111 if (mp->m_flags & XFS_MOUNT_DMAPI) { \ 112 (*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT, mp, \ 113 (mp)->m_rootip, DM_RIGHT_NULL, \ 114 (mp)->m_rootip, DM_RIGHT_NULL, \ 115 NULL, NULL, 0, 0, XFS_DMAPI_UNMOUNT_FLAGS(mp)); \ 116 } \ 117 } while (0) 118 #define XFS_SEND_UNMOUNT(mp) \ 119 do { \ 120 if (mp->m_flags & XFS_MOUNT_DMAPI) { \ 121 (*(mp)->m_dm_ops->xfs_send_unmount)(mp, (mp)->m_rootip, \ 122 DM_RIGHT_NULL, 0, 0, XFS_DMAPI_UNMOUNT_FLAGS(mp)); \ 123 } \ 124 } while (0) 125 126 127 #ifdef HAVE_PERCPU_SB 128 129 /* 130 * Valid per-cpu incore superblock counters. Note that if you add new counters, 131 * you may need to define new counter disabled bit field descriptors as there 132 * are more possible fields in the superblock that can fit in a bitfield on a 133 * 32 bit platform. The XFS_SBS_* values for the current current counters just 134 * fit. 135 */ 136 typedef struct xfs_icsb_cnts { 137 uint64_t icsb_fdblocks; 138 uint64_t icsb_ifree; 139 uint64_t icsb_icount; 140 unsigned long icsb_flags; 141 } xfs_icsb_cnts_t; 142 143 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ 144 145 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ 146 147 extern int xfs_icsb_init_counters(struct xfs_mount *); 148 extern void xfs_icsb_reinit_counters(struct xfs_mount *); 149 extern void xfs_icsb_destroy_counters(struct xfs_mount *); 150 extern void xfs_icsb_sync_counters(struct xfs_mount *, int); 151 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); 152 153 #else 154 #define xfs_icsb_init_counters(mp) (0) 155 #define xfs_icsb_destroy_counters(mp) do { } while (0) 156 #define xfs_icsb_reinit_counters(mp) do { } while (0) 157 #define xfs_icsb_sync_counters(mp, flags) do { } while (0) 158 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) 159 #endif 160 161 typedef struct xfs_mount { 162 struct super_block *m_super; 163 xfs_tid_t m_tid; /* next unused tid for fs */ 164 struct xfs_ail *m_ail; /* fs active log item list */ 165 xfs_sb_t m_sb; /* copy of fs superblock */ 166 spinlock_t m_sb_lock; /* sb counter lock */ 167 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 168 char *m_fsname; /* filesystem name */ 169 int m_fsname_len; /* strlen of fs name */ 170 char *m_rtname; /* realtime device name */ 171 char *m_logname; /* external log device name */ 172 int m_bsize; /* fs logical block size */ 173 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 174 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 175 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 176 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 177 uint m_readio_log; /* min read size log bytes */ 178 uint m_readio_blocks; /* min read size blocks */ 179 uint m_writeio_log; /* min write size log bytes */ 180 uint m_writeio_blocks; /* min write size blocks */ 181 struct log *m_log; /* log specific stuff */ 182 int m_logbufs; /* number of log buffers */ 183 int m_logbsize; /* size of each log buffer */ 184 uint m_rsumlevels; /* rt summary levels */ 185 uint m_rsumsize; /* size of rt summary, bytes */ 186 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 187 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 188 struct xfs_inode *m_rootip; /* pointer to root directory */ 189 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 190 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 191 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 192 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 193 __uint8_t m_blkbit_log; /* blocklog + NBBY */ 194 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 195 __uint8_t m_agno_log; /* log #ag's */ 196 __uint8_t m_agino_log; /* #bits for agino in inum */ 197 __uint16_t m_inode_cluster_size;/* min inode buf size */ 198 uint m_blockmask; /* sb_blocksize-1 */ 199 uint m_blockwsize; /* sb_blocksize in words */ 200 uint m_blockwmask; /* blockwsize-1 */ 201 uint m_alloc_mxr[2]; /* max alloc btree records */ 202 uint m_alloc_mnr[2]; /* min alloc btree records */ 203 uint m_bmap_dmxr[2]; /* max bmap btree records */ 204 uint m_bmap_dmnr[2]; /* min bmap btree records */ 205 uint m_inobt_mxr[2]; /* max inobt btree records */ 206 uint m_inobt_mnr[2]; /* min inobt btree records */ 207 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 208 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 209 uint m_in_maxlevels; /* max inobt btree levels. */ 210 struct xfs_perag *m_perag; /* per-ag accounting info */ 211 struct rw_semaphore m_peraglock; /* lock for m_perag (pointer) */ 212 struct mutex m_growlock; /* growfs mutex */ 213 int m_fixedfsid[2]; /* unchanged for life of FS */ 214 uint m_dmevmask; /* DMI events for this FS */ 215 __uint64_t m_flags; /* global mount flags */ 216 uint m_dir_node_ents; /* #entries in a dir danode */ 217 uint m_attr_node_ents; /* #entries in attr danode */ 218 int m_ialloc_inos; /* inodes in inode allocation */ 219 int m_ialloc_blks; /* blocks in inode allocation */ 220 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 221 uint m_qflags; /* quota status flags */ 222 xfs_trans_reservations_t m_reservations;/* precomputed res values */ 223 __uint64_t m_maxicount; /* maximum inode count */ 224 __uint64_t m_maxioffset; /* maximum inode offset */ 225 __uint64_t m_resblks; /* total reserved blocks */ 226 __uint64_t m_resblks_avail;/* available reserved blocks */ 227 int m_dalign; /* stripe unit */ 228 int m_swidth; /* stripe width */ 229 int m_sinoalign; /* stripe unit inode alignment */ 230 int m_attr_magicpct;/* 37% of the blocksize */ 231 int m_dir_magicpct; /* 37% of the dir blocksize */ 232 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 233 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 234 int m_dirblksize; /* directory block sz--bytes */ 235 int m_dirblkfsbs; /* directory block sz--fsbs */ 236 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */ 237 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */ 238 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */ 239 uint m_chsize; /* size of next field */ 240 struct xfs_chash *m_chash; /* fs private inode per-cluster 241 * hash table */ 242 struct xfs_dmops *m_dm_ops; /* vector of DMI ops */ 243 struct xfs_qmops *m_qm_ops; /* vector of XQM ops */ 244 atomic_t m_active_trans; /* number trans frozen */ 245 #ifdef HAVE_PERCPU_SB 246 xfs_icsb_cnts_t *m_sb_cnts; /* per-cpu superblock counters */ 247 unsigned long m_icsb_counters; /* disabled per-cpu counters */ 248 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ 249 struct mutex m_icsb_mutex; /* balancer sync lock */ 250 #endif 251 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 252 struct task_struct *m_sync_task; /* generalised sync thread */ 253 xfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */ 254 struct list_head m_sync_list; /* sync thread work item list */ 255 spinlock_t m_sync_lock; /* work item list lock */ 256 int m_sync_seq; /* sync thread generation no. */ 257 wait_queue_head_t m_wait_single_sync_task; 258 __int64_t m_update_flags; /* sb flags we need to update 259 on the next remount,rw */ 260 } xfs_mount_t; 261 262 /* 263 * Flags for m_flags. 264 */ 265 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 266 must be synchronous except 267 for space allocations */ 268 #define XFS_MOUNT_DMAPI (1ULL << 2) /* dmapi is enabled */ 269 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 270 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 271 operations, typically for 272 disk errors in metadata */ 273 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to 274 user */ 275 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 276 allocations */ 277 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 278 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 279 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 280 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 281 #define XFS_MOUNT_OSYNCISOSYNC (1ULL << 13) /* o_sync is REALLY o_sync */ 282 /* osyncisdsync is now default*/ 283 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above 284 * 32 bits in size */ 285 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */ 286 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 287 #define XFS_MOUNT_BARRIER (1ULL << 17) 288 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 289 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 290 * allocation */ 291 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 292 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 293 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 294 * I/O size in stat() */ 295 #define XFS_MOUNT_NO_PERCPU_SB (1ULL << 23) /* don't use per-cpu superblock 296 counters */ 297 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 298 allocator */ 299 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 300 301 302 /* 303 * Default minimum read and write sizes. 304 */ 305 #define XFS_READIO_LOG_LARGE 16 306 #define XFS_WRITEIO_LOG_LARGE 16 307 308 /* 309 * Max and min values for mount-option defined I/O 310 * preallocation sizes. 311 */ 312 #define XFS_MAX_IO_LOG 30 /* 1G */ 313 #define XFS_MIN_IO_LOG PAGE_SHIFT 314 315 /* 316 * Synchronous read and write sizes. This should be 317 * better for NFSv2 wsync filesystems. 318 */ 319 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 320 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 321 322 /* 323 * Allow large block sizes to be reported to userspace programs if the 324 * "largeio" mount option is used. 325 * 326 * If compatibility mode is specified, simply return the basic unit of caching 327 * so that we don't get inefficient read/modify/write I/O from user apps. 328 * Otherwise.... 329 * 330 * If the underlying volume is a stripe, then return the stripe width in bytes 331 * as the recommended I/O size. It is not a stripe and we've set a default 332 * buffered I/O size, return that, otherwise return the compat default. 333 */ 334 static inline unsigned long 335 xfs_preferred_iosize(xfs_mount_t *mp) 336 { 337 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 338 return PAGE_CACHE_SIZE; 339 return (mp->m_swidth ? 340 (mp->m_swidth << mp->m_sb.sb_blocklog) : 341 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 342 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) : 343 PAGE_CACHE_SIZE)); 344 } 345 346 #define XFS_MAXIOFFSET(mp) ((mp)->m_maxioffset) 347 348 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 349 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 350 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 351 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 352 int lnnum); 353 #define xfs_force_shutdown(m,f) \ 354 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 355 356 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 357 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 358 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 359 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 360 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 361 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 362 363 #define xfs_test_for_freeze(mp) ((mp)->m_super->s_frozen) 364 #define xfs_wait_for_freeze(mp,l) vfs_check_frozen((mp)->m_super, (l)) 365 366 /* 367 * Flags for xfs_mountfs 368 */ 369 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 370 371 static inline xfs_agnumber_t 372 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 373 { 374 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 375 do_div(ld, mp->m_sb.sb_agblocks); 376 return (xfs_agnumber_t) ld; 377 } 378 379 static inline xfs_agblock_t 380 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 381 { 382 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d); 383 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 384 } 385 386 /* 387 * perag get/put wrappers for eventual ref counting 388 */ 389 static inline xfs_perag_t * 390 xfs_get_perag(struct xfs_mount *mp, xfs_ino_t ino) 391 { 392 return &mp->m_perag[XFS_INO_TO_AGNO(mp, ino)]; 393 } 394 395 static inline void 396 xfs_put_perag(struct xfs_mount *mp, xfs_perag_t *pag) 397 { 398 /* nothing to see here, move along */ 399 } 400 401 /* 402 * Per-cpu superblock locking functions 403 */ 404 #ifdef HAVE_PERCPU_SB 405 static inline void 406 xfs_icsb_lock(xfs_mount_t *mp) 407 { 408 mutex_lock(&mp->m_icsb_mutex); 409 } 410 411 static inline void 412 xfs_icsb_unlock(xfs_mount_t *mp) 413 { 414 mutex_unlock(&mp->m_icsb_mutex); 415 } 416 #else 417 #define xfs_icsb_lock(mp) 418 #define xfs_icsb_unlock(mp) 419 #endif 420 421 /* 422 * This structure is for use by the xfs_mod_incore_sb_batch() routine. 423 * xfs_growfs can specify a few fields which are more than int limit 424 */ 425 typedef struct xfs_mod_sb { 426 xfs_sb_field_t msb_field; /* Field to modify, see below */ 427 int64_t msb_delta; /* Change to make to specified field */ 428 } xfs_mod_sb_t; 429 430 extern int xfs_log_sbcount(xfs_mount_t *, uint); 431 extern int xfs_mountfs(xfs_mount_t *mp); 432 433 extern void xfs_unmountfs(xfs_mount_t *); 434 extern int xfs_unmountfs_writesb(xfs_mount_t *); 435 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int); 436 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *, 437 uint, int); 438 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t); 439 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 440 extern int xfs_readsb(xfs_mount_t *, int); 441 extern void xfs_freesb(xfs_mount_t *); 442 extern int xfs_fs_writable(xfs_mount_t *); 443 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); 444 445 extern int xfs_dmops_get(struct xfs_mount *); 446 extern void xfs_dmops_put(struct xfs_mount *); 447 448 extern struct xfs_dmops xfs_dmcore_xfs; 449 450 #endif /* __KERNEL__ */ 451 452 extern void xfs_mod_sb(struct xfs_trans *, __int64_t); 453 extern xfs_agnumber_t xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t); 454 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *); 455 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t); 456 457 #endif /* __XFS_MOUNT_H__ */ 458