2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
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.
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.
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
18 #ifndef __XFS_MOUNT_H__
19 #define __XFS_MOUNT_H__
30 struct xfs_da_geometry;
35 * Valid per-cpu incore superblock counters. Note that if you add new counters,
36 * you may need to define new counter disabled bit field descriptors as there
37 * are more possible fields in the superblock that can fit in a bitfield on a
38 * 32 bit platform. The XFS_SBS_* values for the current current counters just
41 typedef struct xfs_icsb_cnts {
42 uint64_t icsb_fdblocks;
44 unsigned long icsb_flags;
47 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */
49 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
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,
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)
69 /* dynamic preallocation free space thresholds, 5% down to 1% */
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 */
84 struct xfs_sb m_sb; /* copy of fs superblock */
85 spinlock_t m_sb_lock; /* sb counter lock */
86 struct percpu_counter m_icount; /* allocated inodes counter */
88 struct xfs_buf *m_sb_bp; /* buffer for superblock */
89 char *m_fsname; /* filesystem name */
90 int m_fsname_len; /* strlen of fs name */
91 char *m_rtname; /* realtime device name */
92 char *m_logname; /* external log device name */
93 int m_bsize; /* fs logical block size */
94 xfs_agnumber_t m_agfrotor; /* last ag where space found */
95 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
96 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
97 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
98 uint m_readio_log; /* min read size log bytes */
99 uint m_readio_blocks; /* min read size blocks */
100 uint m_writeio_log; /* min write size log bytes */
101 uint m_writeio_blocks; /* min write size blocks */
102 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
103 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
104 struct xlog *m_log; /* log specific stuff */
105 int m_logbufs; /* number of log buffers */
106 int m_logbsize; /* size of each log buffer */
107 uint m_rsumlevels; /* rt summary levels */
108 uint m_rsumsize; /* size of rt summary, bytes */
109 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
110 struct xfs_inode *m_rsumip; /* pointer to summary inode */
111 struct xfs_inode *m_rootip; /* pointer to root directory */
112 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
113 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
114 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
115 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
116 __uint8_t m_blkbit_log; /* blocklog + NBBY */
117 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
118 __uint8_t m_agno_log; /* log #ag's */
119 __uint8_t m_agino_log; /* #bits for agino in inum */
120 uint m_inode_cluster_size;/* min inode buf size */
121 uint m_blockmask; /* sb_blocksize-1 */
122 uint m_blockwsize; /* sb_blocksize in words */
123 uint m_blockwmask; /* blockwsize-1 */
124 uint m_alloc_mxr[2]; /* max alloc btree records */
125 uint m_alloc_mnr[2]; /* min alloc btree records */
126 uint m_bmap_dmxr[2]; /* max bmap btree records */
127 uint m_bmap_dmnr[2]; /* min bmap btree records */
128 uint m_inobt_mxr[2]; /* max inobt btree records */
129 uint m_inobt_mnr[2]; /* min inobt btree records */
130 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
131 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
132 uint m_in_maxlevels; /* max inobt btree levels. */
133 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
134 spinlock_t m_perag_lock; /* lock for m_perag_tree */
135 struct mutex m_growlock; /* growfs mutex */
136 int m_fixedfsid[2]; /* unchanged for life of FS */
137 uint m_dmevmask; /* DMI events for this FS */
138 __uint64_t m_flags; /* global mount flags */
139 int m_ialloc_inos; /* inodes in inode allocation */
140 int m_ialloc_blks; /* blocks in inode allocation */
141 int m_inoalign_mask;/* mask sb_inoalignmt if used */
142 uint m_qflags; /* quota status flags */
143 struct xfs_trans_resv m_resv; /* precomputed res values */
144 __uint64_t m_maxicount; /* maximum inode count */
145 __uint64_t m_resblks; /* total reserved blocks */
146 __uint64_t m_resblks_avail;/* available reserved blocks */
147 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */
148 int m_dalign; /* stripe unit */
149 int m_swidth; /* stripe width */
150 int m_sinoalign; /* stripe unit inode alignment */
151 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
152 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
153 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
154 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
155 uint m_chsize; /* size of next field */
156 atomic_t m_active_trans; /* number trans frozen */
157 #ifdef HAVE_PERCPU_SB
158 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */
159 unsigned long m_icsb_counters; /* disabled per-cpu counters */
160 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */
161 struct mutex m_icsb_mutex; /* balancer sync lock */
163 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
164 struct delayed_work m_reclaim_work; /* background inode reclaim */
165 struct delayed_work m_eofblocks_work; /* background eof blocks
167 bool m_update_sb; /* sb needs update in mount */
168 int64_t m_low_space[XFS_LOWSP_MAX];
169 /* low free space thresholds */
170 struct xfs_kobj m_kobj;
172 struct workqueue_struct *m_buf_workqueue;
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;
181 * Generation of the filesysyem layout. This is incremented by each
182 * growfs, and used by the pNFS server to ensure the client updates
183 * its view of the block device once it gets a layout that might
184 * reference the newly added blocks. Does not need to be persistent
185 * as long as we only allow file system size increments, but if we
186 * ever support shrinks it would have to be persisted in addition
187 * to various other kinds of pain inflicted on the pNFS server.
189 __uint32_t m_generation;
195 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
196 must be synchronous except
197 for space allocations */
198 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
199 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
200 operations, typically for
201 disk errors in metadata */
202 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
203 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
205 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
206 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
207 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
208 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
209 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
211 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
212 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
213 #define XFS_MOUNT_BARRIER (1ULL << 17)
214 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
215 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
217 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
218 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
219 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
220 * I/O size in stat() */
221 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
223 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
227 * Default minimum read and write sizes.
229 #define XFS_READIO_LOG_LARGE 16
230 #define XFS_WRITEIO_LOG_LARGE 16
233 * Max and min values for mount-option defined I/O
234 * preallocation sizes.
236 #define XFS_MAX_IO_LOG 30 /* 1G */
237 #define XFS_MIN_IO_LOG PAGE_SHIFT
240 * Synchronous read and write sizes. This should be
241 * better for NFSv2 wsync filesystems.
243 #define XFS_WSYNC_READIO_LOG 15 /* 32k */
244 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
247 * Allow large block sizes to be reported to userspace programs if the
248 * "largeio" mount option is used.
250 * If compatibility mode is specified, simply return the basic unit of caching
251 * so that we don't get inefficient read/modify/write I/O from user apps.
254 * If the underlying volume is a stripe, then return the stripe width in bytes
255 * as the recommended I/O size. It is not a stripe and we've set a default
256 * buffered I/O size, return that, otherwise return the compat default.
258 static inline unsigned long
259 xfs_preferred_iosize(xfs_mount_t *mp)
261 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
262 return PAGE_CACHE_SIZE;
263 return (mp->m_swidth ?
264 (mp->m_swidth << mp->m_sb.sb_blocklog) :
265 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
266 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
270 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
271 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
272 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
273 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
275 #define xfs_force_shutdown(m,f) \
276 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
278 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
279 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
280 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
281 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
282 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
283 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
286 * Flags for xfs_mountfs
288 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
290 static inline xfs_agnumber_t
291 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
293 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
294 do_div(ld, mp->m_sb.sb_agblocks);
295 return (xfs_agnumber_t) ld;
298 static inline xfs_agblock_t
299 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
301 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
302 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
306 * Per-cpu superblock locking functions
308 #ifdef HAVE_PERCPU_SB
310 xfs_icsb_lock(xfs_mount_t *mp)
312 mutex_lock(&mp->m_icsb_mutex);
316 xfs_icsb_unlock(xfs_mount_t *mp)
318 mutex_unlock(&mp->m_icsb_mutex);
321 #define xfs_icsb_lock(mp)
322 #define xfs_icsb_unlock(mp)
326 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
327 * xfs_growfs can specify a few fields which are more than int limit
329 typedef struct xfs_mod_sb {
330 xfs_sb_field_t msb_field; /* Field to modify, see below */
331 int64_t msb_delta; /* Change to make to specified field */
335 * Per-ag incore structure, copies of information in agf and agi, to improve the
336 * performance of allocation group selection.
338 typedef struct xfs_perag {
339 struct xfs_mount *pag_mount; /* owner filesystem */
340 xfs_agnumber_t pag_agno; /* AG this structure belongs to */
341 atomic_t pag_ref; /* perag reference count */
342 char pagf_init; /* this agf's entry is initialized */
343 char pagi_init; /* this agi's entry is initialized */
344 char pagf_metadata; /* the agf is preferred to be metadata */
345 char pagi_inodeok; /* The agi is ok for inodes */
346 __uint8_t pagf_levels[XFS_BTNUM_AGF];
347 /* # of levels in bno & cnt btree */
348 __uint32_t pagf_flcount; /* count of blocks in freelist */
349 xfs_extlen_t pagf_freeblks; /* total free blocks */
350 xfs_extlen_t pagf_longest; /* longest free space */
351 __uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
352 xfs_agino_t pagi_freecount; /* number of free inodes */
353 xfs_agino_t pagi_count; /* number of allocated inodes */
356 * Inode allocation search lookup optimisation.
357 * If the pagino matches, the search for new inodes
358 * doesn't need to search the near ones again straight away
360 xfs_agino_t pagl_pagino;
361 xfs_agino_t pagl_leftrec;
362 xfs_agino_t pagl_rightrec;
363 spinlock_t pagb_lock; /* lock for pagb_tree */
364 struct rb_root pagb_tree; /* ordered tree of busy extents */
366 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
368 spinlock_t pag_ici_lock; /* incore inode cache lock */
369 struct radix_tree_root pag_ici_root; /* incore inode cache root */
370 int pag_ici_reclaimable; /* reclaimable inodes */
371 struct mutex pag_ici_reclaim_lock; /* serialisation point */
372 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
374 /* buffer cache index */
375 spinlock_t pag_buf_lock; /* lock for pag_buf_tree */
376 struct rb_root pag_buf_tree; /* ordered tree of active buffers */
378 /* for rcu-safe freeing */
379 struct rcu_head rcu_head;
380 int pagb_count; /* pagb slots in use */
383 extern int xfs_log_sbcount(xfs_mount_t *);
384 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
385 extern int xfs_mountfs(xfs_mount_t *mp);
386 extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
387 xfs_agnumber_t *maxagi);
389 extern void xfs_unmountfs(xfs_mount_t *);
390 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
391 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
393 extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
394 extern int xfs_mount_log_sb(xfs_mount_t *);
395 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
396 extern int xfs_readsb(xfs_mount_t *, int);
397 extern void xfs_freesb(xfs_mount_t *);
398 extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
399 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
401 extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
403 extern void xfs_set_low_space_thresholds(struct xfs_mount *);
405 #endif /* __KERNEL__ */
407 #endif /* __XFS_MOUNT_H__ */