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 uint tr_qm_sbchange
; /* change quota flags */
44 uint tr_qm_setqlim
; /* adjust quota limits */
45 uint tr_qm_dqalloc
; /* allocate quota on disk */
46 uint tr_qm_quotaoff
; /* turn quota off */
47 uint tr_qm_equotaoff
;/* end of turn quota off */
48 uint tr_sb
; /* modify superblock */
49 } xfs_trans_reservations_t
;
53 #define xfs_daddr_to_agno(mp,d) \
54 ((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
55 #define xfs_daddr_to_agbno(mp,d) \
56 ((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
58 #else /* __KERNEL__ */
70 * Valid per-cpu incore superblock counters. Note that if you add new counters,
71 * you may need to define new counter disabled bit field descriptors as there
72 * are more possible fields in the superblock that can fit in a bitfield on a
73 * 32 bit platform. The XFS_SBS_* values for the current current counters just
76 typedef struct xfs_icsb_cnts
{
77 uint64_t icsb_fdblocks
;
80 unsigned long icsb_flags
;
83 #define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */
85 #define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
87 extern int xfs_icsb_init_counters(struct xfs_mount
*);
88 extern void xfs_icsb_reinit_counters(struct xfs_mount
*);
89 extern void xfs_icsb_destroy_counters(struct xfs_mount
*);
90 extern void xfs_icsb_sync_counters(struct xfs_mount
*, int);
91 extern void xfs_icsb_sync_counters_locked(struct xfs_mount
*, int);
92 extern int xfs_icsb_modify_counters(struct xfs_mount
*, xfs_sb_field_t
,
96 #define xfs_icsb_init_counters(mp) (0)
97 #define xfs_icsb_destroy_counters(mp) do { } while (0)
98 #define xfs_icsb_reinit_counters(mp) do { } while (0)
99 #define xfs_icsb_sync_counters(mp, flags) do { } while (0)
100 #define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
101 #define xfs_icsb_modify_counters(mp, field, delta, rsvd) \
102 xfs_mod_incore_sb(mp, field, delta, rsvd)
105 /* dynamic preallocation free space thresholds, 5% down to 1% */
107 XFS_LOWSP_1_PCNT
= 0,
115 typedef struct xfs_mount
{
116 struct super_block
*m_super
;
117 xfs_tid_t m_tid
; /* next unused tid for fs */
118 struct xfs_ail
*m_ail
; /* fs active log item list */
119 xfs_sb_t m_sb
; /* copy of fs superblock */
120 spinlock_t m_sb_lock
; /* sb counter lock */
121 struct xfs_buf
*m_sb_bp
; /* buffer for superblock */
122 char *m_fsname
; /* filesystem name */
123 int m_fsname_len
; /* strlen of fs name */
124 char *m_rtname
; /* realtime device name */
125 char *m_logname
; /* external log device name */
126 int m_bsize
; /* fs logical block size */
127 xfs_agnumber_t m_agfrotor
; /* last ag where space found */
128 xfs_agnumber_t m_agirotor
; /* last ag dir inode alloced */
129 spinlock_t m_agirotor_lock
;/* .. and lock protecting it */
130 xfs_agnumber_t m_maxagi
; /* highest inode alloc group */
131 uint m_readio_log
; /* min read size log bytes */
132 uint m_readio_blocks
; /* min read size blocks */
133 uint m_writeio_log
; /* min write size log bytes */
134 uint m_writeio_blocks
; /* min write size blocks */
135 struct xlog
*m_log
; /* log specific stuff */
136 int m_logbufs
; /* number of log buffers */
137 int m_logbsize
; /* size of each log buffer */
138 uint m_rsumlevels
; /* rt summary levels */
139 uint m_rsumsize
; /* size of rt summary, bytes */
140 struct xfs_inode
*m_rbmip
; /* pointer to bitmap inode */
141 struct xfs_inode
*m_rsumip
; /* pointer to summary inode */
142 struct xfs_inode
*m_rootip
; /* pointer to root directory */
143 struct xfs_quotainfo
*m_quotainfo
; /* disk quota information */
144 xfs_buftarg_t
*m_ddev_targp
; /* saves taking the address */
145 xfs_buftarg_t
*m_logdev_targp
;/* ptr to log device */
146 xfs_buftarg_t
*m_rtdev_targp
; /* ptr to rt device */
147 __uint8_t m_blkbit_log
; /* blocklog + NBBY */
148 __uint8_t m_blkbb_log
; /* blocklog - BBSHIFT */
149 __uint8_t m_agno_log
; /* log #ag's */
150 __uint8_t m_agino_log
; /* #bits for agino in inum */
151 __uint16_t m_inode_cluster_size
;/* min inode buf size */
152 uint m_blockmask
; /* sb_blocksize-1 */
153 uint m_blockwsize
; /* sb_blocksize in words */
154 uint m_blockwmask
; /* blockwsize-1 */
155 uint m_alloc_mxr
[2]; /* max alloc btree records */
156 uint m_alloc_mnr
[2]; /* min alloc btree records */
157 uint m_bmap_dmxr
[2]; /* max bmap btree records */
158 uint m_bmap_dmnr
[2]; /* min bmap btree records */
159 uint m_inobt_mxr
[2]; /* max inobt btree records */
160 uint m_inobt_mnr
[2]; /* min inobt btree records */
161 uint m_ag_maxlevels
; /* XFS_AG_MAXLEVELS */
162 uint m_bm_maxlevels
[2]; /* XFS_BM_MAXLEVELS */
163 uint m_in_maxlevels
; /* max inobt btree levels. */
164 struct radix_tree_root m_perag_tree
; /* per-ag accounting info */
165 spinlock_t m_perag_lock
; /* lock for m_perag_tree */
166 struct mutex m_growlock
; /* growfs mutex */
167 int m_fixedfsid
[2]; /* unchanged for life of FS */
168 uint m_dmevmask
; /* DMI events for this FS */
169 __uint64_t m_flags
; /* global mount flags */
170 uint m_dir_node_ents
; /* #entries in a dir danode */
171 uint m_attr_node_ents
; /* #entries in attr danode */
172 int m_ialloc_inos
; /* inodes in inode allocation */
173 int m_ialloc_blks
; /* blocks in inode allocation */
174 int m_inoalign_mask
;/* mask sb_inoalignmt if used */
175 uint m_qflags
; /* quota status flags */
176 xfs_trans_reservations_t m_reservations
;/* precomputed res values */
177 __uint64_t m_maxicount
; /* maximum inode count */
178 __uint64_t m_resblks
; /* total reserved blocks */
179 __uint64_t m_resblks_avail
;/* available reserved blocks */
180 __uint64_t m_resblks_save
; /* reserved blks @ remount,ro */
181 int m_dalign
; /* stripe unit */
182 int m_swidth
; /* stripe width */
183 int m_sinoalign
; /* stripe unit inode alignment */
184 int m_attr_magicpct
;/* 37% of the blocksize */
185 int m_dir_magicpct
; /* 37% of the dir blocksize */
186 __uint8_t m_sectbb_log
; /* sectlog - BBSHIFT */
187 const struct xfs_nameops
*m_dirnameops
; /* vector of dir name ops */
188 int m_dirblksize
; /* directory block sz--bytes */
189 int m_dirblkfsbs
; /* directory block sz--fsbs */
190 xfs_dablk_t m_dirdatablk
; /* blockno of dir data v2 */
191 xfs_dablk_t m_dirleafblk
; /* blockno of dir non-data v2 */
192 xfs_dablk_t m_dirfreeblk
; /* blockno of dirfreeindex v2 */
193 uint m_chsize
; /* size of next field */
194 struct xfs_chash
*m_chash
; /* fs private inode per-cluster
196 atomic_t m_active_trans
; /* number trans frozen */
197 #ifdef HAVE_PERCPU_SB
198 xfs_icsb_cnts_t __percpu
*m_sb_cnts
; /* per-cpu superblock counters */
199 unsigned long m_icsb_counters
; /* disabled per-cpu counters */
200 struct notifier_block m_icsb_notifier
; /* hotplug cpu notifier */
201 struct mutex m_icsb_mutex
; /* balancer sync lock */
203 struct xfs_mru_cache
*m_filestream
; /* per-mount filestream data */
204 struct delayed_work m_reclaim_work
; /* background inode reclaim */
205 struct delayed_work m_eofblocks_work
; /* background eof blocks
207 __int64_t m_update_flags
; /* sb flags we need to update
208 on the next remount,rw */
209 struct shrinker m_inode_shrink
; /* inode reclaim shrinker */
210 int64_t m_low_space
[XFS_LOWSP_MAX
];
211 /* low free space thresholds */
213 struct workqueue_struct
*m_data_workqueue
;
214 struct workqueue_struct
*m_unwritten_workqueue
;
215 struct workqueue_struct
*m_cil_workqueue
;
216 struct workqueue_struct
*m_reclaim_workqueue
;
217 struct workqueue_struct
*m_log_workqueue
;
218 struct workqueue_struct
*m_eofblocks_workqueue
;
224 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
225 must be synchronous except
226 for space allocations */
227 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
228 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
229 operations, typically for
230 disk errors in metadata */
231 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
232 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to
234 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
236 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
237 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
238 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
239 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
240 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
242 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
243 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
244 #define XFS_MOUNT_BARRIER (1ULL << 17)
245 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
246 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
248 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
249 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
250 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
251 * I/O size in stat() */
252 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
254 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
258 * Default minimum read and write sizes.
260 #define XFS_READIO_LOG_LARGE 16
261 #define XFS_WRITEIO_LOG_LARGE 16
264 * Max and min values for mount-option defined I/O
265 * preallocation sizes.
267 #define XFS_MAX_IO_LOG 30 /* 1G */
268 #define XFS_MIN_IO_LOG PAGE_SHIFT
271 * Synchronous read and write sizes. This should be
272 * better for NFSv2 wsync filesystems.
274 #define XFS_WSYNC_READIO_LOG 15 /* 32k */
275 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
278 * Allow large block sizes to be reported to userspace programs if the
279 * "largeio" mount option is used.
281 * If compatibility mode is specified, simply return the basic unit of caching
282 * so that we don't get inefficient read/modify/write I/O from user apps.
285 * If the underlying volume is a stripe, then return the stripe width in bytes
286 * as the recommended I/O size. It is not a stripe and we've set a default
287 * buffered I/O size, return that, otherwise return the compat default.
289 static inline unsigned long
290 xfs_preferred_iosize(xfs_mount_t
*mp
)
292 if (mp
->m_flags
& XFS_MOUNT_COMPAT_IOSIZE
)
293 return PAGE_CACHE_SIZE
;
294 return (mp
->m_swidth
?
295 (mp
->m_swidth
<< mp
->m_sb
.sb_blocklog
) :
296 ((mp
->m_flags
& XFS_MOUNT_DFLT_IOSIZE
) ?
297 (1 << (int)MAX(mp
->m_readio_log
, mp
->m_writeio_log
)) :
301 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
302 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
303 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
304 void xfs_do_force_shutdown(struct xfs_mount
*mp
, int flags
, char *fname
,
306 #define xfs_force_shutdown(m,f) \
307 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
309 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
310 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
311 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
312 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
313 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
314 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
317 * Flags for xfs_mountfs
319 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
321 static inline xfs_agnumber_t
322 xfs_daddr_to_agno(struct xfs_mount
*mp
, xfs_daddr_t d
)
324 xfs_daddr_t ld
= XFS_BB_TO_FSBT(mp
, d
);
325 do_div(ld
, mp
->m_sb
.sb_agblocks
);
326 return (xfs_agnumber_t
) ld
;
329 static inline xfs_agblock_t
330 xfs_daddr_to_agbno(struct xfs_mount
*mp
, xfs_daddr_t d
)
332 xfs_daddr_t ld
= XFS_BB_TO_FSBT(mp
, d
);
333 return (xfs_agblock_t
) do_div(ld
, mp
->m_sb
.sb_agblocks
);
337 * perag get/put wrappers for ref counting
339 struct xfs_perag
*xfs_perag_get(struct xfs_mount
*mp
, xfs_agnumber_t agno
);
340 struct xfs_perag
*xfs_perag_get_tag(struct xfs_mount
*mp
, xfs_agnumber_t agno
,
342 void xfs_perag_put(struct xfs_perag
*pag
);
345 * Per-cpu superblock locking functions
347 #ifdef HAVE_PERCPU_SB
349 xfs_icsb_lock(xfs_mount_t
*mp
)
351 mutex_lock(&mp
->m_icsb_mutex
);
355 xfs_icsb_unlock(xfs_mount_t
*mp
)
357 mutex_unlock(&mp
->m_icsb_mutex
);
360 #define xfs_icsb_lock(mp)
361 #define xfs_icsb_unlock(mp)
365 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
366 * xfs_growfs can specify a few fields which are more than int limit
368 typedef struct xfs_mod_sb
{
369 xfs_sb_field_t msb_field
; /* Field to modify, see below */
370 int64_t msb_delta
; /* Change to make to specified field */
373 extern int xfs_log_sbcount(xfs_mount_t
*);
374 extern __uint64_t
xfs_default_resblks(xfs_mount_t
*mp
);
375 extern int xfs_mountfs(xfs_mount_t
*mp
);
377 extern void xfs_unmountfs(xfs_mount_t
*);
378 extern int xfs_mod_incore_sb(xfs_mount_t
*, xfs_sb_field_t
, int64_t, int);
379 extern int xfs_mod_incore_sb_batch(xfs_mount_t
*, xfs_mod_sb_t
*,
381 extern int xfs_mount_log_sb(xfs_mount_t
*, __int64_t
);
382 extern struct xfs_buf
*xfs_getsb(xfs_mount_t
*, int);
383 extern int xfs_readsb(xfs_mount_t
*, int);
384 extern void xfs_freesb(xfs_mount_t
*);
385 extern int xfs_fs_writable(xfs_mount_t
*);
386 extern int xfs_sb_validate_fsb_count(struct xfs_sb
*, __uint64_t
);
388 extern int xfs_dev_is_read_only(struct xfs_mount
*, char *);
390 extern void xfs_set_low_space_thresholds(struct xfs_mount
*);
392 #endif /* __KERNEL__ */
394 extern void xfs_mod_sb(struct xfs_trans
*, __int64_t
);
395 extern int xfs_initialize_perag(struct xfs_mount
*, xfs_agnumber_t
,
397 extern void xfs_sb_from_disk(struct xfs_sb
*, struct xfs_dsb
*);
398 extern void xfs_sb_to_disk(struct xfs_dsb
*, struct xfs_sb
*, __int64_t
);
400 extern const struct xfs_buf_ops xfs_sb_buf_ops
;
402 #endif /* __XFS_MOUNT_H__ */