1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #ifndef __XFS_MOUNT_H__ 7 #define __XFS_MOUNT_H__ 8 9 struct xlog; 10 struct xfs_inode; 11 struct xfs_mru_cache; 12 struct xfs_nameops; 13 struct xfs_ail; 14 struct xfs_quotainfo; 15 struct xfs_dir_ops; 16 struct xfs_da_geometry; 17 18 /* dynamic preallocation free space thresholds, 5% down to 1% */ 19 enum { 20 XFS_LOWSP_1_PCNT = 0, 21 XFS_LOWSP_2_PCNT, 22 XFS_LOWSP_3_PCNT, 23 XFS_LOWSP_4_PCNT, 24 XFS_LOWSP_5_PCNT, 25 XFS_LOWSP_MAX, 26 }; 27 28 /* 29 * Error Configuration 30 * 31 * Error classes define the subsystem the configuration belongs to. 32 * Error numbers define the errors that are configurable. 33 */ 34 enum { 35 XFS_ERR_METADATA, 36 XFS_ERR_CLASS_MAX, 37 }; 38 enum { 39 XFS_ERR_DEFAULT, 40 XFS_ERR_EIO, 41 XFS_ERR_ENOSPC, 42 XFS_ERR_ENODEV, 43 XFS_ERR_ERRNO_MAX, 44 }; 45 46 #define XFS_ERR_RETRY_FOREVER -1 47 48 /* 49 * Although retry_timeout is in jiffies which is normally an unsigned long, 50 * we limit the retry timeout to 86400 seconds, or one day. So even a 51 * signed 32-bit long is sufficient for a HZ value up to 24855. Making it 52 * signed lets us store the special "-1" value, meaning retry forever. 53 */ 54 struct xfs_error_cfg { 55 struct xfs_kobj kobj; 56 int max_retries; 57 long retry_timeout; /* in jiffies, -1 = infinite */ 58 }; 59 60 typedef struct xfs_mount { 61 struct super_block *m_super; 62 xfs_tid_t m_tid; /* next unused tid for fs */ 63 struct xfs_ail *m_ail; /* fs active log item list */ 64 65 struct xfs_sb m_sb; /* copy of fs superblock */ 66 spinlock_t m_sb_lock; /* sb counter lock */ 67 struct percpu_counter m_icount; /* allocated inodes counter */ 68 struct percpu_counter m_ifree; /* free inodes counter */ 69 struct percpu_counter m_fdblocks; /* free block counter */ 70 71 struct xfs_buf *m_sb_bp; /* buffer for superblock */ 72 char *m_fsname; /* filesystem name */ 73 int m_fsname_len; /* strlen of fs name */ 74 char *m_rtname; /* realtime device name */ 75 char *m_logname; /* external log device name */ 76 int m_bsize; /* fs logical block size */ 77 xfs_agnumber_t m_agfrotor; /* last ag where space found */ 78 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ 79 spinlock_t m_agirotor_lock;/* .. and lock protecting it */ 80 xfs_agnumber_t m_maxagi; /* highest inode alloc group */ 81 uint m_readio_log; /* min read size log bytes */ 82 uint m_readio_blocks; /* min read size blocks */ 83 uint m_writeio_log; /* min write size log bytes */ 84 uint m_writeio_blocks; /* min write size blocks */ 85 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */ 86 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */ 87 struct xlog *m_log; /* log specific stuff */ 88 int m_logbufs; /* number of log buffers */ 89 int m_logbsize; /* size of each log buffer */ 90 uint m_rsumlevels; /* rt summary levels */ 91 uint m_rsumsize; /* size of rt summary, bytes */ 92 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */ 93 struct xfs_inode *m_rsumip; /* pointer to summary inode */ 94 struct xfs_inode *m_rootip; /* pointer to root directory */ 95 struct xfs_quotainfo *m_quotainfo; /* disk quota information */ 96 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */ 97 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */ 98 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */ 99 uint8_t m_blkbit_log; /* blocklog + NBBY */ 100 uint8_t m_blkbb_log; /* blocklog - BBSHIFT */ 101 uint8_t m_agno_log; /* log #ag's */ 102 uint8_t m_agino_log; /* #bits for agino in inum */ 103 uint m_inode_cluster_size;/* min inode buf size */ 104 uint m_blockmask; /* sb_blocksize-1 */ 105 uint m_blockwsize; /* sb_blocksize in words */ 106 uint m_blockwmask; /* blockwsize-1 */ 107 uint m_alloc_mxr[2]; /* max alloc btree records */ 108 uint m_alloc_mnr[2]; /* min alloc btree records */ 109 uint m_bmap_dmxr[2]; /* max bmap btree records */ 110 uint m_bmap_dmnr[2]; /* min bmap btree records */ 111 uint m_inobt_mxr[2]; /* max inobt btree records */ 112 uint m_inobt_mnr[2]; /* min inobt btree records */ 113 uint m_rmap_mxr[2]; /* max rmap btree records */ 114 uint m_rmap_mnr[2]; /* min rmap btree records */ 115 uint m_refc_mxr[2]; /* max refc btree records */ 116 uint m_refc_mnr[2]; /* min refc btree records */ 117 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */ 118 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ 119 uint m_in_maxlevels; /* max inobt btree levels. */ 120 uint m_rmap_maxlevels; /* max rmap btree levels */ 121 uint m_refc_maxlevels; /* max refcount btree level */ 122 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */ 123 uint m_alloc_set_aside; /* space we can't use */ 124 uint m_ag_max_usable; /* max space per AG */ 125 struct radix_tree_root m_perag_tree; /* per-ag accounting info */ 126 spinlock_t m_perag_lock; /* lock for m_perag_tree */ 127 struct mutex m_growlock; /* growfs mutex */ 128 int m_fixedfsid[2]; /* unchanged for life of FS */ 129 uint64_t m_flags; /* global mount flags */ 130 bool m_inotbt_nores; /* no per-AG finobt resv. */ 131 int m_ialloc_inos; /* inodes in inode allocation */ 132 int m_ialloc_blks; /* blocks in inode allocation */ 133 int m_ialloc_min_blks;/* min blocks in sparse inode 134 * allocation */ 135 int m_inoalign_mask;/* mask sb_inoalignmt if used */ 136 uint m_qflags; /* quota status flags */ 137 struct xfs_trans_resv m_resv; /* precomputed res values */ 138 uint64_t m_maxicount; /* maximum inode count */ 139 uint64_t m_resblks; /* total reserved blocks */ 140 uint64_t m_resblks_avail;/* available reserved blocks */ 141 uint64_t m_resblks_save; /* reserved blks @ remount,ro */ 142 int m_dalign; /* stripe unit */ 143 int m_swidth; /* stripe width */ 144 int m_sinoalign; /* stripe unit inode alignment */ 145 uint8_t m_sectbb_log; /* sectlog - BBSHIFT */ 146 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */ 147 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */ 148 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */ 149 uint m_chsize; /* size of next field */ 150 atomic_t m_active_trans; /* number trans frozen */ 151 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ 152 struct delayed_work m_reclaim_work; /* background inode reclaim */ 153 struct delayed_work m_eofblocks_work; /* background eof blocks 154 trimming */ 155 struct delayed_work m_cowblocks_work; /* background cow blocks 156 trimming */ 157 bool m_update_sb; /* sb needs update in mount */ 158 int64_t m_low_space[XFS_LOWSP_MAX]; 159 /* low free space thresholds */ 160 struct xfs_kobj m_kobj; 161 struct xfs_kobj m_error_kobj; 162 struct xfs_kobj m_error_meta_kobj; 163 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX]; 164 struct xstats m_stats; /* per-fs stats */ 165 166 struct workqueue_struct *m_buf_workqueue; 167 struct workqueue_struct *m_data_workqueue; 168 struct workqueue_struct *m_unwritten_workqueue; 169 struct workqueue_struct *m_cil_workqueue; 170 struct workqueue_struct *m_reclaim_workqueue; 171 struct workqueue_struct *m_log_workqueue; 172 struct workqueue_struct *m_eofblocks_workqueue; 173 struct workqueue_struct *m_sync_workqueue; 174 175 /* 176 * Generation of the filesysyem layout. This is incremented by each 177 * growfs, and used by the pNFS server to ensure the client updates 178 * its view of the block device once it gets a layout that might 179 * reference the newly added blocks. Does not need to be persistent 180 * as long as we only allow file system size increments, but if we 181 * ever support shrinks it would have to be persisted in addition 182 * to various other kinds of pain inflicted on the pNFS server. 183 */ 184 uint32_t m_generation; 185 186 bool m_fail_unmount; 187 #ifdef DEBUG 188 /* 189 * Frequency with which errors are injected. Replaces xfs_etest; the 190 * value stored in here is the inverse of the frequency with which the 191 * error triggers. 1 = always, 2 = half the time, etc. 192 */ 193 unsigned int *m_errortag; 194 struct xfs_kobj m_errortag_kobj; 195 #endif 196 } xfs_mount_t; 197 198 /* 199 * Flags for m_flags. 200 */ 201 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops 202 must be synchronous except 203 for space allocations */ 204 #define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */ 205 #define XFS_MOUNT_BAD_SUMMARY (1ULL << 2) /* summary counters are bad */ 206 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3) 207 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem 208 operations, typically for 209 disk errors in metadata */ 210 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ 211 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment 212 allocations */ 213 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ 214 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ 215 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ 216 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */ 217 #define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */ 218 #define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */ 219 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ 220 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ 221 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width 222 * allocation */ 223 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ 224 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ 225 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred 226 * I/O size in stat() */ 227 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams 228 allocator */ 229 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ 230 231 #define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */ 232 233 234 /* 235 * Default minimum read and write sizes. 236 */ 237 #define XFS_READIO_LOG_LARGE 16 238 #define XFS_WRITEIO_LOG_LARGE 16 239 240 /* 241 * Max and min values for mount-option defined I/O 242 * preallocation sizes. 243 */ 244 #define XFS_MAX_IO_LOG 30 /* 1G */ 245 #define XFS_MIN_IO_LOG PAGE_SHIFT 246 247 /* 248 * Synchronous read and write sizes. This should be 249 * better for NFSv2 wsync filesystems. 250 */ 251 #define XFS_WSYNC_READIO_LOG 15 /* 32k */ 252 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */ 253 254 /* 255 * Allow large block sizes to be reported to userspace programs if the 256 * "largeio" mount option is used. 257 * 258 * If compatibility mode is specified, simply return the basic unit of caching 259 * so that we don't get inefficient read/modify/write I/O from user apps. 260 * Otherwise.... 261 * 262 * If the underlying volume is a stripe, then return the stripe width in bytes 263 * as the recommended I/O size. It is not a stripe and we've set a default 264 * buffered I/O size, return that, otherwise return the compat default. 265 */ 266 static inline unsigned long 267 xfs_preferred_iosize(xfs_mount_t *mp) 268 { 269 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE) 270 return PAGE_SIZE; 271 return (mp->m_swidth ? 272 (mp->m_swidth << mp->m_sb.sb_blocklog) : 273 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ? 274 (1 << (int)max(mp->m_readio_log, mp->m_writeio_log)) : 275 PAGE_SIZE)); 276 } 277 278 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ 279 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) 280 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) 281 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, 282 int lnnum); 283 #define xfs_force_shutdown(m,f) \ 284 xfs_do_force_shutdown(m, f, __FILE__, __LINE__) 285 286 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ 287 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ 288 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ 289 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ 290 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ 291 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ 292 293 /* 294 * Flags for xfs_mountfs 295 */ 296 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ 297 298 static inline xfs_agnumber_t 299 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) 300 { 301 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); 302 do_div(ld, mp->m_sb.sb_agblocks); 303 return (xfs_agnumber_t) ld; 304 } 305 306 static inline xfs_agblock_t 307 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) 308 { 309 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); 310 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); 311 } 312 313 /* per-AG block reservation data structures*/ 314 enum xfs_ag_resv_type { 315 XFS_AG_RESV_NONE = 0, 316 XFS_AG_RESV_AGFL, 317 XFS_AG_RESV_METADATA, 318 XFS_AG_RESV_RMAPBT, 319 }; 320 321 struct xfs_ag_resv { 322 /* number of blocks originally reserved here */ 323 xfs_extlen_t ar_orig_reserved; 324 /* number of blocks reserved here */ 325 xfs_extlen_t ar_reserved; 326 /* number of blocks originally asked for */ 327 xfs_extlen_t ar_asked; 328 }; 329 330 /* 331 * Per-ag incore structure, copies of information in agf and agi, to improve the 332 * performance of allocation group selection. 333 */ 334 typedef struct xfs_perag { 335 struct xfs_mount *pag_mount; /* owner filesystem */ 336 xfs_agnumber_t pag_agno; /* AG this structure belongs to */ 337 atomic_t pag_ref; /* perag reference count */ 338 char pagf_init; /* this agf's entry is initialized */ 339 char pagi_init; /* this agi's entry is initialized */ 340 char pagf_metadata; /* the agf is preferred to be metadata */ 341 char pagi_inodeok; /* The agi is ok for inodes */ 342 uint8_t pagf_levels[XFS_BTNUM_AGF]; 343 /* # of levels in bno & cnt btree */ 344 bool pagf_agflreset; /* agfl requires reset before use */ 345 uint32_t pagf_flcount; /* count of blocks in freelist */ 346 xfs_extlen_t pagf_freeblks; /* total free blocks */ 347 xfs_extlen_t pagf_longest; /* longest free space */ 348 uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ 349 xfs_agino_t pagi_freecount; /* number of free inodes */ 350 xfs_agino_t pagi_count; /* number of allocated inodes */ 351 352 /* 353 * Inode allocation search lookup optimisation. 354 * If the pagino matches, the search for new inodes 355 * doesn't need to search the near ones again straight away 356 */ 357 xfs_agino_t pagl_pagino; 358 xfs_agino_t pagl_leftrec; 359 xfs_agino_t pagl_rightrec; 360 spinlock_t pagb_lock; /* lock for pagb_tree */ 361 struct rb_root pagb_tree; /* ordered tree of busy extents */ 362 unsigned int pagb_gen; /* generation count for pagb_tree */ 363 wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */ 364 365 atomic_t pagf_fstrms; /* # of filestreams active in this AG */ 366 367 spinlock_t pag_ici_lock; /* incore inode cache lock */ 368 struct radix_tree_root pag_ici_root; /* incore inode cache root */ 369 int pag_ici_reclaimable; /* reclaimable inodes */ 370 struct mutex pag_ici_reclaim_lock; /* serialisation point */ 371 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ 372 373 /* buffer cache index */ 374 spinlock_t pag_buf_lock; /* lock for pag_buf_hash */ 375 struct rhashtable pag_buf_hash; 376 377 /* for rcu-safe freeing */ 378 struct rcu_head rcu_head; 379 int pagb_count; /* pagb slots in use */ 380 381 /* Blocks reserved for all kinds of metadata. */ 382 struct xfs_ag_resv pag_meta_resv; 383 /* Blocks reserved for the reverse mapping btree. */ 384 struct xfs_ag_resv pag_rmapbt_resv; 385 386 /* reference count */ 387 uint8_t pagf_refcount_level; 388 } xfs_perag_t; 389 390 static inline struct xfs_ag_resv * 391 xfs_perag_resv( 392 struct xfs_perag *pag, 393 enum xfs_ag_resv_type type) 394 { 395 switch (type) { 396 case XFS_AG_RESV_METADATA: 397 return &pag->pag_meta_resv; 398 case XFS_AG_RESV_RMAPBT: 399 return &pag->pag_rmapbt_resv; 400 default: 401 return NULL; 402 } 403 } 404 405 int xfs_buf_hash_init(xfs_perag_t *pag); 406 void xfs_buf_hash_destroy(xfs_perag_t *pag); 407 408 extern void xfs_uuid_table_free(void); 409 extern int xfs_log_sbcount(xfs_mount_t *); 410 extern uint64_t xfs_default_resblks(xfs_mount_t *mp); 411 extern int xfs_mountfs(xfs_mount_t *mp); 412 extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, 413 xfs_agnumber_t *maxagi); 414 extern void xfs_unmountfs(xfs_mount_t *); 415 416 extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta); 417 extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta); 418 extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, 419 bool reserved); 420 extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta); 421 422 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int); 423 extern int xfs_readsb(xfs_mount_t *, int); 424 extern void xfs_freesb(xfs_mount_t *); 425 extern bool xfs_fs_writable(struct xfs_mount *mp, int level); 426 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t); 427 428 extern int xfs_dev_is_read_only(struct xfs_mount *, char *); 429 430 extern void xfs_set_low_space_thresholds(struct xfs_mount *); 431 432 int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb, 433 xfs_off_t count_fsb); 434 435 struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp, 436 int error_class, int error); 437 void xfs_force_summary_recalc(struct xfs_mount *mp); 438 439 #endif /* __XFS_MOUNT_H__ */ 440