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__
34 * Valid per-cpu incore superblock counters. Note that if you add new counters,
35 * you may need to define new counter disabled bit field descriptors as there
36 * are more possible fields in the superblock that can fit in a bitfield on a
37 * 32 bit platform. The XFS_SBS_* values for the current current counters just
40 typedef struct xfs_icsb_cnts
{
41 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 */
83 xfs_sb_t m_sb
; /* copy of fs superblock */
84 spinlock_t m_sb_lock
; /* sb counter lock */
85 struct xfs_buf
*m_sb_bp
; /* buffer for superblock */
86 char *m_fsname
; /* filesystem name */
87 int m_fsname_len
; /* strlen of fs name */
88 char *m_rtname
; /* realtime device name */
89 char *m_logname
; /* external log device name */
90 int m_bsize
; /* fs logical block size */
91 xfs_agnumber_t m_agfrotor
; /* last ag where space found */
92 xfs_agnumber_t m_agirotor
; /* last ag dir inode alloced */
93 spinlock_t m_agirotor_lock
;/* .. and lock protecting it */
94 xfs_agnumber_t m_maxagi
; /* highest inode alloc group */
95 uint m_readio_log
; /* min read size log bytes */
96 uint m_readio_blocks
; /* min read size blocks */
97 uint m_writeio_log
; /* min write size log bytes */
98 uint m_writeio_blocks
; /* min write size blocks */
99 struct xlog
*m_log
; /* log specific stuff */
100 int m_logbufs
; /* number of log buffers */
101 int m_logbsize
; /* size of each log buffer */
102 uint m_rsumlevels
; /* rt summary levels */
103 uint m_rsumsize
; /* size of rt summary, bytes */
104 struct xfs_inode
*m_rbmip
; /* pointer to bitmap inode */
105 struct xfs_inode
*m_rsumip
; /* pointer to summary inode */
106 struct xfs_inode
*m_rootip
; /* pointer to root directory */
107 struct xfs_quotainfo
*m_quotainfo
; /* disk quota information */
108 xfs_buftarg_t
*m_ddev_targp
; /* saves taking the address */
109 xfs_buftarg_t
*m_logdev_targp
;/* ptr to log device */
110 xfs_buftarg_t
*m_rtdev_targp
; /* ptr to rt device */
111 __uint8_t m_blkbit_log
; /* blocklog + NBBY */
112 __uint8_t m_blkbb_log
; /* blocklog - BBSHIFT */
113 __uint8_t m_agno_log
; /* log #ag's */
114 __uint8_t m_agino_log
; /* #bits for agino in inum */
115 uint m_inode_cluster_size
;/* min inode buf size */
116 uint m_blockmask
; /* sb_blocksize-1 */
117 uint m_blockwsize
; /* sb_blocksize in words */
118 uint m_blockwmask
; /* blockwsize-1 */
119 uint m_alloc_mxr
[2]; /* max alloc btree records */
120 uint m_alloc_mnr
[2]; /* min alloc btree records */
121 uint m_bmap_dmxr
[2]; /* max bmap btree records */
122 uint m_bmap_dmnr
[2]; /* min bmap btree records */
123 uint m_inobt_mxr
[2]; /* max inobt btree records */
124 uint m_inobt_mnr
[2]; /* min inobt btree records */
125 uint m_ag_maxlevels
; /* XFS_AG_MAXLEVELS */
126 uint m_bm_maxlevels
[2]; /* XFS_BM_MAXLEVELS */
127 uint m_in_maxlevels
; /* max inobt btree levels. */
128 struct radix_tree_root m_perag_tree
; /* per-ag accounting info */
129 spinlock_t m_perag_lock
; /* lock for m_perag_tree */
130 struct mutex m_growlock
; /* growfs mutex */
131 int m_fixedfsid
[2]; /* unchanged for life of FS */
132 uint m_dmevmask
; /* DMI events for this FS */
133 __uint64_t m_flags
; /* global mount flags */
134 uint m_dir_node_ents
; /* #entries in a dir danode */
135 uint m_attr_node_ents
; /* #entries in attr danode */
136 int m_ialloc_inos
; /* inodes in inode allocation */
137 int m_ialloc_blks
; /* blocks in inode allocation */
138 int m_inoalign_mask
;/* mask sb_inoalignmt if used */
139 uint m_qflags
; /* quota status flags */
140 struct xfs_trans_resv m_resv
; /* precomputed res values */
141 __uint64_t m_maxicount
; /* maximum inode count */
142 __uint64_t m_resblks
; /* total reserved blocks */
143 __uint64_t m_resblks_avail
;/* available reserved blocks */
144 __uint64_t m_resblks_save
; /* reserved blks @ remount,ro */
145 int m_dalign
; /* stripe unit */
146 int m_swidth
; /* stripe width */
147 int m_sinoalign
; /* stripe unit inode alignment */
148 int m_attr_magicpct
;/* 37% of the blocksize */
149 int m_dir_magicpct
; /* 37% of the dir blocksize */
150 __uint8_t m_sectbb_log
; /* sectlog - BBSHIFT */
151 const struct xfs_nameops
*m_dirnameops
; /* vector of dir name ops */
152 const struct xfs_dir_ops
*m_dir_inode_ops
; /* vector of dir inode ops */
153 const struct xfs_dir_ops
*m_nondir_inode_ops
; /* !dir inode ops */
154 int m_dirblksize
; /* directory block sz--bytes */
155 int m_dirblkfsbs
; /* directory block sz--fsbs */
156 xfs_dablk_t m_dirdatablk
; /* blockno of dir data v2 */
157 xfs_dablk_t m_dirleafblk
; /* blockno of dir non-data v2 */
158 xfs_dablk_t m_dirfreeblk
; /* blockno of dirfreeindex v2 */
159 uint m_chsize
; /* size of next field */
160 atomic_t m_active_trans
; /* number trans frozen */
161 #ifdef HAVE_PERCPU_SB
162 xfs_icsb_cnts_t __percpu
*m_sb_cnts
; /* per-cpu superblock counters */
163 unsigned long m_icsb_counters
; /* disabled per-cpu counters */
164 struct notifier_block m_icsb_notifier
; /* hotplug cpu notifier */
165 struct mutex m_icsb_mutex
; /* balancer sync lock */
167 struct xfs_mru_cache
*m_filestream
; /* per-mount filestream data */
168 struct delayed_work m_reclaim_work
; /* background inode reclaim */
169 struct delayed_work m_eofblocks_work
; /* background eof blocks
171 __int64_t m_update_flags
; /* sb flags we need to update
172 on the next remount,rw */
173 int64_t m_low_space
[XFS_LOWSP_MAX
];
174 /* low free space thresholds */
176 struct workqueue_struct
*m_data_workqueue
;
177 struct workqueue_struct
*m_unwritten_workqueue
;
178 struct workqueue_struct
*m_cil_workqueue
;
179 struct workqueue_struct
*m_reclaim_workqueue
;
180 struct workqueue_struct
*m_log_workqueue
;
181 struct workqueue_struct
*m_eofblocks_workqueue
;
187 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
188 must be synchronous except
189 for space allocations */
190 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
191 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
192 operations, typically for
193 disk errors in metadata */
194 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
195 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
197 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
198 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
199 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
200 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
201 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
203 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
204 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
205 #define XFS_MOUNT_BARRIER (1ULL << 17)
206 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
207 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
209 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
210 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
211 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
212 * I/O size in stat() */
213 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
215 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
219 * Default minimum read and write sizes.
221 #define XFS_READIO_LOG_LARGE 16
222 #define XFS_WRITEIO_LOG_LARGE 16
225 * Max and min values for mount-option defined I/O
226 * preallocation sizes.
228 #define XFS_MAX_IO_LOG 30 /* 1G */
229 #define XFS_MIN_IO_LOG PAGE_SHIFT
232 * Synchronous read and write sizes. This should be
233 * better for NFSv2 wsync filesystems.
235 #define XFS_WSYNC_READIO_LOG 15 /* 32k */
236 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
239 * Allow large block sizes to be reported to userspace programs if the
240 * "largeio" mount option is used.
242 * If compatibility mode is specified, simply return the basic unit of caching
243 * so that we don't get inefficient read/modify/write I/O from user apps.
246 * If the underlying volume is a stripe, then return the stripe width in bytes
247 * as the recommended I/O size. It is not a stripe and we've set a default
248 * buffered I/O size, return that, otherwise return the compat default.
250 static inline unsigned long
251 xfs_preferred_iosize(xfs_mount_t
*mp
)
253 if (mp
->m_flags
& XFS_MOUNT_COMPAT_IOSIZE
)
254 return PAGE_CACHE_SIZE
;
255 return (mp
->m_swidth
?
256 (mp
->m_swidth
<< mp
->m_sb
.sb_blocklog
) :
257 ((mp
->m_flags
& XFS_MOUNT_DFLT_IOSIZE
) ?
258 (1 << (int)MAX(mp
->m_readio_log
, mp
->m_writeio_log
)) :
262 #define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
263 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
264 #define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
265 void xfs_do_force_shutdown(struct xfs_mount
*mp
, int flags
, char *fname
,
267 #define xfs_force_shutdown(m,f) \
268 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
270 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
271 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
272 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
273 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
274 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
275 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
278 * Flags for xfs_mountfs
280 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
282 static inline xfs_agnumber_t
283 xfs_daddr_to_agno(struct xfs_mount
*mp
, xfs_daddr_t d
)
285 xfs_daddr_t ld
= XFS_BB_TO_FSBT(mp
, d
);
286 do_div(ld
, mp
->m_sb
.sb_agblocks
);
287 return (xfs_agnumber_t
) ld
;
290 static inline xfs_agblock_t
291 xfs_daddr_to_agbno(struct xfs_mount
*mp
, xfs_daddr_t d
)
293 xfs_daddr_t ld
= XFS_BB_TO_FSBT(mp
, d
);
294 return (xfs_agblock_t
) do_div(ld
, mp
->m_sb
.sb_agblocks
);
298 * Per-cpu superblock locking functions
300 #ifdef HAVE_PERCPU_SB
302 xfs_icsb_lock(xfs_mount_t
*mp
)
304 mutex_lock(&mp
->m_icsb_mutex
);
308 xfs_icsb_unlock(xfs_mount_t
*mp
)
310 mutex_unlock(&mp
->m_icsb_mutex
);
313 #define xfs_icsb_lock(mp)
314 #define xfs_icsb_unlock(mp)
318 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
319 * xfs_growfs can specify a few fields which are more than int limit
321 typedef struct xfs_mod_sb
{
322 xfs_sb_field_t msb_field
; /* Field to modify, see below */
323 int64_t msb_delta
; /* Change to make to specified field */
327 * Per-ag incore structure, copies of information in agf and agi, to improve the
328 * performance of allocation group selection. This is defined for the kernel
329 * only, and hence is defined here instead of in xfs_ag.h. You need the struct
330 * xfs_mount to be defined to look up a xfs_perag anyway (via mp->m_perag_tree),
331 * so this doesn't introduce any strange header file dependencies.
333 typedef struct xfs_perag
{
334 struct xfs_mount
*pag_mount
; /* owner filesystem */
335 xfs_agnumber_t pag_agno
; /* AG this structure belongs to */
336 atomic_t pag_ref
; /* perag reference count */
337 char pagf_init
; /* this agf's entry is initialized */
338 char pagi_init
; /* this agi's entry is initialized */
339 char pagf_metadata
; /* the agf is preferred to be metadata */
340 char pagi_inodeok
; /* The agi is ok for inodes */
341 __uint8_t pagf_levels
[XFS_BTNUM_AGF
];
342 /* # of levels in bno & cnt btree */
343 __uint32_t pagf_flcount
; /* count of blocks in freelist */
344 xfs_extlen_t pagf_freeblks
; /* total free blocks */
345 xfs_extlen_t pagf_longest
; /* longest free space */
346 __uint32_t pagf_btreeblks
; /* # of blocks held in AGF btrees */
347 xfs_agino_t pagi_freecount
; /* number of free inodes */
348 xfs_agino_t pagi_count
; /* number of allocated inodes */
351 * Inode allocation search lookup optimisation.
352 * If the pagino matches, the search for new inodes
353 * doesn't need to search the near ones again straight away
355 xfs_agino_t pagl_pagino
;
356 xfs_agino_t pagl_leftrec
;
357 xfs_agino_t pagl_rightrec
;
358 spinlock_t pagb_lock
; /* lock for pagb_tree */
359 struct rb_root pagb_tree
; /* ordered tree of busy extents */
361 atomic_t pagf_fstrms
; /* # of filestreams active in this AG */
363 spinlock_t pag_ici_lock
; /* incore inode cache lock */
364 struct radix_tree_root pag_ici_root
; /* incore inode cache root */
365 int pag_ici_reclaimable
; /* reclaimable inodes */
366 struct mutex pag_ici_reclaim_lock
; /* serialisation point */
367 unsigned long pag_ici_reclaim_cursor
; /* reclaim restart point */
369 /* buffer cache index */
370 spinlock_t pag_buf_lock
; /* lock for pag_buf_tree */
371 struct rb_root pag_buf_tree
; /* ordered tree of active buffers */
373 /* for rcu-safe freeing */
374 struct rcu_head rcu_head
;
375 int pagb_count
; /* pagb slots in use */
378 extern int xfs_log_sbcount(xfs_mount_t
*);
379 extern __uint64_t
xfs_default_resblks(xfs_mount_t
*mp
);
380 extern int xfs_mountfs(xfs_mount_t
*mp
);
381 extern int xfs_initialize_perag(xfs_mount_t
*mp
, xfs_agnumber_t agcount
,
382 xfs_agnumber_t
*maxagi
);
384 extern void xfs_unmountfs(xfs_mount_t
*);
385 extern int xfs_mod_incore_sb(xfs_mount_t
*, xfs_sb_field_t
, int64_t, int);
386 extern int xfs_mod_incore_sb_batch(xfs_mount_t
*, xfs_mod_sb_t
*,
388 extern int xfs_mount_log_sb(xfs_mount_t
*, __int64_t
);
389 extern struct xfs_buf
*xfs_getsb(xfs_mount_t
*, int);
390 extern int xfs_readsb(xfs_mount_t
*, int);
391 extern void xfs_freesb(xfs_mount_t
*);
392 extern int xfs_fs_writable(xfs_mount_t
*);
393 extern int xfs_sb_validate_fsb_count(struct xfs_sb
*, __uint64_t
);
395 extern int xfs_dev_is_read_only(struct xfs_mount
*, char *);
397 extern void xfs_set_low_space_thresholds(struct xfs_mount
*);
399 #endif /* __KERNEL__ */
401 #endif /* __XFS_MOUNT_H__ */