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__
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;
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))
52 #else /* __KERNEL__ */
64 * Valid per-cpu incore superblock counters. Note that if you add new counters,
65 * you may need to define new counter disabled bit field descriptors as there
66 * are more possible fields in the superblock that can fit in a bitfield on a
67 * 32 bit platform. The XFS_SBS_* values for the current current counters just
70 typedef struct xfs_icsb_cnts {
71 uint64_t icsb_fdblocks;
74 unsigned long icsb_flags;
77 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */
79 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
81 extern int xfs_icsb_init_counters(struct xfs_mount *);
82 extern void xfs_icsb_reinit_counters(struct xfs_mount *);
83 extern void xfs_icsb_destroy_counters(struct xfs_mount *);
84 extern void xfs_icsb_sync_counters(struct xfs_mount *, int);
85 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
86 extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t,
90 #define xfs_icsb_init_counters(mp) (0)
91 #define xfs_icsb_destroy_counters(mp) do { } while (0)
92 #define xfs_icsb_reinit_counters(mp) do { } while (0)
93 #define xfs_icsb_sync_counters(mp, flags) do { } while (0)
94 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
95 #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \
96 xfs_mod_incore_sb(mp, field, delta, rsvd)
99 /* dynamic preallocation free space thresholds, 5% down to 1% */
101 XFS_LOWSP_1_PCNT = 0,
109 typedef struct xfs_mount {
110 struct super_block *m_super;
111 xfs_tid_t m_tid; /* next unused tid for fs */
112 struct xfs_ail *m_ail; /* fs active log item list */
113 xfs_sb_t m_sb; /* copy of fs superblock */
114 spinlock_t m_sb_lock; /* sb counter lock */
115 struct xfs_buf *m_sb_bp; /* buffer for superblock */
116 char *m_fsname; /* filesystem name */
117 int m_fsname_len; /* strlen of fs name */
118 char *m_rtname; /* realtime device name */
119 char *m_logname; /* external log device name */
120 int m_bsize; /* fs logical block size */
121 xfs_agnumber_t m_agfrotor; /* last ag where space found */
122 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
123 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
124 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
125 uint m_readio_log; /* min read size log bytes */
126 uint m_readio_blocks; /* min read size blocks */
127 uint m_writeio_log; /* min write size log bytes */
128 uint m_writeio_blocks; /* min write size blocks */
129 struct xlog *m_log; /* log specific stuff */
130 int m_logbufs; /* number of log buffers */
131 int m_logbsize; /* size of each log buffer */
132 uint m_rsumlevels; /* rt summary levels */
133 uint m_rsumsize; /* size of rt summary, bytes */
134 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
135 struct xfs_inode *m_rsumip; /* pointer to summary inode */
136 struct xfs_inode *m_rootip; /* pointer to root directory */
137 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
138 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
139 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
140 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
141 __uint8_t m_blkbit_log; /* blocklog + NBBY */
142 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
143 __uint8_t m_agno_log; /* log #ag's */
144 __uint8_t m_agino_log; /* #bits for agino in inum */
145 __uint16_t m_inode_cluster_size;/* min inode buf size */
146 uint m_blockmask; /* sb_blocksize-1 */
147 uint m_blockwsize; /* sb_blocksize in words */
148 uint m_blockwmask; /* blockwsize-1 */
149 uint m_alloc_mxr[2]; /* max alloc btree records */
150 uint m_alloc_mnr[2]; /* min alloc btree records */
151 uint m_bmap_dmxr[2]; /* max bmap btree records */
152 uint m_bmap_dmnr[2]; /* min bmap btree records */
153 uint m_inobt_mxr[2]; /* max inobt btree records */
154 uint m_inobt_mnr[2]; /* min inobt btree records */
155 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
156 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
157 uint m_in_maxlevels; /* max inobt btree levels. */
158 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
159 spinlock_t m_perag_lock; /* lock for m_perag_tree */
160 struct mutex m_growlock; /* growfs mutex */
161 int m_fixedfsid[2]; /* unchanged for life of FS */
162 uint m_dmevmask; /* DMI events for this FS */
163 __uint64_t m_flags; /* global mount flags */
164 uint m_dir_node_ents; /* #entries in a dir danode */
165 uint m_attr_node_ents; /* #entries in attr danode */
166 int m_ialloc_inos; /* inodes in inode allocation */
167 int m_ialloc_blks; /* blocks in inode allocation */
168 int m_inoalign_mask;/* mask sb_inoalignmt if used */
169 uint m_qflags; /* quota status flags */
170 xfs_trans_reservations_t m_reservations;/* precomputed res values */
171 __uint64_t m_maxicount; /* maximum inode count */
172 __uint64_t m_resblks; /* total reserved blocks */
173 __uint64_t m_resblks_avail;/* available reserved blocks */
174 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */
175 int m_dalign; /* stripe unit */
176 int m_swidth; /* stripe width */
177 int m_sinoalign; /* stripe unit inode alignment */
178 int m_attr_magicpct;/* 37% of the blocksize */
179 int m_dir_magicpct; /* 37% of the dir blocksize */
180 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
181 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
182 int m_dirblksize; /* directory block sz--bytes */
183 int m_dirblkfsbs; /* directory block sz--fsbs */
184 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */
185 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */
186 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */
187 uint m_chsize; /* size of next field */
188 struct xfs_chash *m_chash; /* fs private inode per-cluster
190 atomic_t m_active_trans; /* number trans frozen */
191 #ifdef HAVE_PERCPU_SB
192 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */
193 unsigned long m_icsb_counters; /* disabled per-cpu counters */
194 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */
195 struct mutex m_icsb_mutex; /* balancer sync lock */
197 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
198 struct delayed_work m_reclaim_work; /* background inode reclaim */
199 struct delayed_work m_eofblocks_work; /* background eof blocks
201 __int64_t m_update_flags; /* sb flags we need to update
202 on the next remount,rw */
203 struct shrinker m_inode_shrink; /* inode reclaim shrinker */
204 int64_t m_low_space[XFS_LOWSP_MAX];
205 /* low free space thresholds */
207 struct workqueue_struct *m_data_workqueue;
208 struct workqueue_struct *m_unwritten_workqueue;
209 struct workqueue_struct *m_cil_workqueue;
210 struct workqueue_struct *m_reclaim_workqueue;
211 struct workqueue_struct *m_log_workqueue;
212 struct workqueue_struct *m_eofblocks_workqueue;
218 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
219 must be synchronous except
220 for space allocations */
221 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
222 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
223 operations, typically for
224 disk errors in metadata */
225 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
226 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to
228 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
230 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
231 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
232 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
233 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
234 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
236 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
237 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
238 #define XFS_MOUNT_BARRIER (1ULL << 17)
239 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
240 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
242 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
243 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
244 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
245 * I/O size in stat() */
246 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
248 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
252 * Default minimum read and write sizes.
254 #define XFS_READIO_LOG_LARGE 16
255 #define XFS_WRITEIO_LOG_LARGE 16
258 * Max and min values for mount-option defined I/O
259 * preallocation sizes.
261 #define XFS_MAX_IO_LOG 30 /* 1G */
262 #define XFS_MIN_IO_LOG PAGE_SHIFT
265 * Synchronous read and write sizes. This should be
266 * better for NFSv2 wsync filesystems.
268 #define XFS_WSYNC_READIO_LOG 15 /* 32k */
269 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
272 * Allow large block sizes to be reported to userspace programs if the
273 * "largeio" mount option is used.
275 * If compatibility mode is specified, simply return the basic unit of caching
276 * so that we don't get inefficient read/modify/write I/O from user apps.
279 * If the underlying volume is a stripe, then return the stripe width in bytes
280 * as the recommended I/O size. It is not a stripe and we've set a default
281 * buffered I/O size, return that, otherwise return the compat default.
283 static inline unsigned long
284 xfs_preferred_iosize(xfs_mount_t *mp)
286 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
287 return PAGE_CACHE_SIZE;
288 return (mp->m_swidth ?
289 (mp->m_swidth << mp->m_sb.sb_blocklog) :
290 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
291 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
295 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
296 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
297 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
298 void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
300 #define xfs_force_shutdown(m,f) \
301 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
303 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
304 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
305 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
306 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
307 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
308 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
311 * Flags for xfs_mountfs
313 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
315 static inline xfs_agnumber_t
316 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
318 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
319 do_div(ld, mp->m_sb.sb_agblocks);
320 return (xfs_agnumber_t) ld;
323 static inline xfs_agblock_t
324 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
326 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
327 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
331 * perag get/put wrappers for ref counting
333 struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);
334 struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno,
336 void xfs_perag_put(struct xfs_perag *pag);
339 * Per-cpu superblock locking functions
341 #ifdef HAVE_PERCPU_SB
343 xfs_icsb_lock(xfs_mount_t *mp)
345 mutex_lock(&mp->m_icsb_mutex);
349 xfs_icsb_unlock(xfs_mount_t *mp)
351 mutex_unlock(&mp->m_icsb_mutex);
354 #define xfs_icsb_lock(mp)
355 #define xfs_icsb_unlock(mp)
359 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
360 * xfs_growfs can specify a few fields which are more than int limit
362 typedef struct xfs_mod_sb {
363 xfs_sb_field_t msb_field; /* Field to modify, see below */
364 int64_t msb_delta; /* Change to make to specified field */
367 extern int xfs_log_sbcount(xfs_mount_t *);
368 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
369 extern int xfs_mountfs(xfs_mount_t *mp);
371 extern void xfs_unmountfs(xfs_mount_t *);
372 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
373 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
375 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
376 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
377 extern int xfs_readsb(xfs_mount_t *, int);
378 extern void xfs_freesb(xfs_mount_t *);
379 extern int xfs_fs_writable(xfs_mount_t *);
380 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
382 extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
384 extern void xfs_set_low_space_thresholds(struct xfs_mount *);
386 #endif /* __KERNEL__ */
388 extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
389 extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
391 extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
392 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
394 extern const struct xfs_buf_ops xfs_sb_buf_ops;
396 #endif /* __XFS_MOUNT_H__ */