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1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18#ifndef __XFS_MOUNT_H__
19#define __XFS_MOUNT_H__
20
21typedef 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;
44
45#ifndef __KERNEL__
46
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))
51
52#else /* __KERNEL__ */
53
54#include "xfs_sync.h"
55
56struct log;
57struct xfs_mount_args;
58struct xfs_inode;
59struct xfs_bmbt_irec;
60struct xfs_bmap_free;
61struct xfs_extdelta;
62struct xfs_swapext;
63struct xfs_mru_cache;
64struct xfs_nameops;
65struct xfs_ail;
66struct xfs_quotainfo;
67
68#ifdef HAVE_PERCPU_SB
69
70/*
71 * Valid per-cpu incore superblock counters. Note that if you add new counters,
72 * you may need to define new counter disabled bit field descriptors as there
73 * are more possible fields in the superblock that can fit in a bitfield on a
74 * 32 bit platform. The XFS_SBS_* values for the current current counters just
75 * fit.
76 */
77typedef struct xfs_icsb_cnts {
78 uint64_t icsb_fdblocks;
79 uint64_t icsb_ifree;
80 uint64_t icsb_icount;
81 unsigned long icsb_flags;
82} xfs_icsb_cnts_t;
83
84#define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */
85
86#define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
87
88extern int xfs_icsb_init_counters(struct xfs_mount *);
89extern void xfs_icsb_reinit_counters(struct xfs_mount *);
90extern void xfs_icsb_destroy_counters(struct xfs_mount *);
91extern void xfs_icsb_sync_counters(struct xfs_mount *, int);
92extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
93extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t,
94 int64_t, int);
95
96#else
97#define xfs_icsb_init_counters(mp) (0)
98#define xfs_icsb_destroy_counters(mp) do { } while (0)
99#define xfs_icsb_reinit_counters(mp) do { } while (0)
100#define xfs_icsb_sync_counters(mp, flags) do { } while (0)
101#define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
102#define xfs_icsb_modify_counters(mp, field, delta, rsvd) \
103 xfs_mod_incore_sb(mp, field, delta, rsvd)
104#endif
105
106/* dynamic preallocation free space thresholds, 5% down to 1% */
107enum {
108 XFS_LOWSP_1_PCNT = 0,
109 XFS_LOWSP_2_PCNT,
110 XFS_LOWSP_3_PCNT,
111 XFS_LOWSP_4_PCNT,
112 XFS_LOWSP_5_PCNT,
113 XFS_LOWSP_MAX,
114};
115
116typedef struct xfs_mount {
117 struct super_block *m_super;
118 xfs_tid_t m_tid; /* next unused tid for fs */
119 struct xfs_ail *m_ail; /* fs active log item list */
120 xfs_sb_t m_sb; /* copy of fs superblock */
121 spinlock_t m_sb_lock; /* sb counter lock */
122 struct xfs_buf *m_sb_bp; /* buffer for superblock */
123 char *m_fsname; /* filesystem name */
124 int m_fsname_len; /* strlen of fs name */
125 char *m_rtname; /* realtime device name */
126 char *m_logname; /* external log device name */
127 int m_bsize; /* fs logical block size */
128 xfs_agnumber_t m_agfrotor; /* last ag where space found */
129 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
130 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
131 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
132 uint m_readio_log; /* min read size log bytes */
133 uint m_readio_blocks; /* min read size blocks */
134 uint m_writeio_log; /* min write size log bytes */
135 uint m_writeio_blocks; /* min write size blocks */
136 struct log *m_log; /* log specific stuff */
137 int m_logbufs; /* number of log buffers */
138 int m_logbsize; /* size of each log buffer */
139 uint m_rsumlevels; /* rt summary levels */
140 uint m_rsumsize; /* size of rt summary, bytes */
141 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
142 struct xfs_inode *m_rsumip; /* pointer to summary inode */
143 struct xfs_inode *m_rootip; /* pointer to root directory */
144 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
145 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
146 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
147 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
148 __uint8_t m_blkbit_log; /* blocklog + NBBY */
149 __uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
150 __uint8_t m_agno_log; /* log #ag's */
151 __uint8_t m_agino_log; /* #bits for agino in inum */
152 __uint16_t m_inode_cluster_size;/* min inode buf size */
153 uint m_blockmask; /* sb_blocksize-1 */
154 uint m_blockwsize; /* sb_blocksize in words */
155 uint m_blockwmask; /* blockwsize-1 */
156 uint m_alloc_mxr[2]; /* max alloc btree records */
157 uint m_alloc_mnr[2]; /* min alloc btree records */
158 uint m_bmap_dmxr[2]; /* max bmap btree records */
159 uint m_bmap_dmnr[2]; /* min bmap btree records */
160 uint m_inobt_mxr[2]; /* max inobt btree records */
161 uint m_inobt_mnr[2]; /* min inobt btree records */
162 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
163 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
164 uint m_in_maxlevels; /* max inobt btree levels. */
165 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
166 spinlock_t m_perag_lock; /* lock for m_perag_tree */
167 struct mutex m_growlock; /* growfs mutex */
168 int m_fixedfsid[2]; /* unchanged for life of FS */
169 uint m_dmevmask; /* DMI events for this FS */
170 __uint64_t m_flags; /* global mount flags */
171 uint m_dir_node_ents; /* #entries in a dir danode */
172 uint m_attr_node_ents; /* #entries in attr danode */
173 int m_ialloc_inos; /* inodes in inode allocation */
174 int m_ialloc_blks; /* blocks in inode allocation */
175 int m_inoalign_mask;/* mask sb_inoalignmt if used */
176 uint m_qflags; /* quota status flags */
177 xfs_trans_reservations_t m_reservations;/* precomputed res values */
178 __uint64_t m_maxicount; /* maximum inode count */
179 __uint64_t m_maxioffset; /* maximum inode offset */
180 __uint64_t m_resblks; /* total reserved blocks */
181 __uint64_t m_resblks_avail;/* available reserved blocks */
182 __uint64_t m_resblks_save; /* reserved blks @ remount,ro */
183 int m_dalign; /* stripe unit */
184 int m_swidth; /* stripe width */
185 int m_sinoalign; /* stripe unit inode alignment */
186 int m_attr_magicpct;/* 37% of the blocksize */
187 int m_dir_magicpct; /* 37% of the dir blocksize */
188 __uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
189 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
190 int m_dirblksize; /* directory block sz--bytes */
191 int m_dirblkfsbs; /* directory block sz--fsbs */
192 xfs_dablk_t m_dirdatablk; /* blockno of dir data v2 */
193 xfs_dablk_t m_dirleafblk; /* blockno of dir non-data v2 */
194 xfs_dablk_t m_dirfreeblk; /* blockno of dirfreeindex v2 */
195 uint m_chsize; /* size of next field */
196 struct xfs_chash *m_chash; /* fs private inode per-cluster
197 * hash table */
198 atomic_t m_active_trans; /* number trans frozen */
199#ifdef HAVE_PERCPU_SB
200 xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */
201 unsigned long m_icsb_counters; /* disabled per-cpu counters */
202 struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */
203 struct mutex m_icsb_mutex; /* balancer sync lock */
204#endif
205 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
206 struct delayed_work m_sync_work; /* background sync work */
207 struct delayed_work m_reclaim_work; /* background inode reclaim */
208 struct work_struct m_flush_work; /* background inode flush */
209 __int64_t m_update_flags; /* sb flags we need to update
210 on the next remount,rw */
211 struct shrinker m_inode_shrink; /* inode reclaim shrinker */
212 int64_t m_low_space[XFS_LOWSP_MAX];
213 /* low free space thresholds */
214} xfs_mount_t;
215
216/*
217 * Flags for m_flags.
218 */
219#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
220 must be synchronous except
221 for space allocations */
222#define XFS_MOUNT_DELAYLOG (1ULL << 1) /* delayed logging is enabled */
223#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
224#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
225 operations, typically for
226 disk errors in metadata */
227#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
228#define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to
229 user */
230#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
231 allocations */
232#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
233#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
234#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
235#define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
236#define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
237 * 32 bits in size */
238#define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
239#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
240#define XFS_MOUNT_BARRIER (1ULL << 17)
241#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
242#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
243 * allocation */
244#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
245#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
246#define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
247 * I/O size in stat() */
248#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
249 allocator */
250#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
251
252
253/*
254 * Default minimum read and write sizes.
255 */
256#define XFS_READIO_LOG_LARGE 16
257#define XFS_WRITEIO_LOG_LARGE 16
258
259/*
260 * Max and min values for mount-option defined I/O
261 * preallocation sizes.
262 */
263#define XFS_MAX_IO_LOG 30 /* 1G */
264#define XFS_MIN_IO_LOG PAGE_SHIFT
265
266/*
267 * Synchronous read and write sizes. This should be
268 * better for NFSv2 wsync filesystems.
269 */
270#define XFS_WSYNC_READIO_LOG 15 /* 32k */
271#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
272
273/*
274 * Allow large block sizes to be reported to userspace programs if the
275 * "largeio" mount option is used.
276 *
277 * If compatibility mode is specified, simply return the basic unit of caching
278 * so that we don't get inefficient read/modify/write I/O from user apps.
279 * Otherwise....
280 *
281 * If the underlying volume is a stripe, then return the stripe width in bytes
282 * as the recommended I/O size. It is not a stripe and we've set a default
283 * buffered I/O size, return that, otherwise return the compat default.
284 */
285static inline unsigned long
286xfs_preferred_iosize(xfs_mount_t *mp)
287{
288 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
289 return PAGE_CACHE_SIZE;
290 return (mp->m_swidth ?
291 (mp->m_swidth << mp->m_sb.sb_blocklog) :
292 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
293 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
294 PAGE_CACHE_SIZE));
295}
296
297#define XFS_MAXIOFFSET(mp) ((mp)->m_maxioffset)
298
299#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
300 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
301#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
302void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
303 int lnnum);
304#define xfs_force_shutdown(m,f) \
305 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
306
307#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
308#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
309#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
310#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
311#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
312#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
313
314#define xfs_test_for_freeze(mp) ((mp)->m_super->s_frozen)
315#define xfs_wait_for_freeze(mp,l) vfs_check_frozen((mp)->m_super, (l))
316
317/*
318 * Flags for xfs_mountfs
319 */
320#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
321
322static inline xfs_agnumber_t
323xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
324{
325 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
326 do_div(ld, mp->m_sb.sb_agblocks);
327 return (xfs_agnumber_t) ld;
328}
329
330static inline xfs_agblock_t
331xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
332{
333 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
334 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
335}
336
337/*
338 * perag get/put wrappers for ref counting
339 */
340struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);
341struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno,
342 int tag);
343void xfs_perag_put(struct xfs_perag *pag);
344
345/*
346 * Per-cpu superblock locking functions
347 */
348#ifdef HAVE_PERCPU_SB
349static inline void
350xfs_icsb_lock(xfs_mount_t *mp)
351{
352 mutex_lock(&mp->m_icsb_mutex);
353}
354
355static inline void
356xfs_icsb_unlock(xfs_mount_t *mp)
357{
358 mutex_unlock(&mp->m_icsb_mutex);
359}
360#else
361#define xfs_icsb_lock(mp)
362#define xfs_icsb_unlock(mp)
363#endif
364
365/*
366 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
367 * xfs_growfs can specify a few fields which are more than int limit
368 */
369typedef struct xfs_mod_sb {
370 xfs_sb_field_t msb_field; /* Field to modify, see below */
371 int64_t msb_delta; /* Change to make to specified field */
372} xfs_mod_sb_t;
373
374extern int xfs_log_sbcount(xfs_mount_t *);
375extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
376extern int xfs_mountfs(xfs_mount_t *mp);
377
378extern void xfs_unmountfs(xfs_mount_t *);
379extern int xfs_unmountfs_writesb(xfs_mount_t *);
380extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
381extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
382 uint, int);
383extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
384extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
385extern int xfs_readsb(xfs_mount_t *, int);
386extern void xfs_freesb(xfs_mount_t *);
387extern int xfs_fs_writable(xfs_mount_t *);
388extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
389
390extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
391
392extern void xfs_set_low_space_thresholds(struct xfs_mount *);
393
394#endif /* __KERNEL__ */
395
396extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
397extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
398 xfs_agnumber_t *);
399extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
400extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
401
402#endif /* __XFS_MOUNT_H__ */
1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
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.
8 *
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.
13 *
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
17 */
18#ifndef __XFS_MOUNT_H__
19#define __XFS_MOUNT_H__
20
21#ifdef __KERNEL__
22
23struct xlog;
24struct xfs_inode;
25struct xfs_mru_cache;
26struct xfs_nameops;
27struct xfs_ail;
28struct xfs_quotainfo;
29struct xfs_dir_ops;
30
31#ifdef HAVE_PERCPU_SB
32
33/*
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
38 * fit.
39 */
40typedef struct xfs_icsb_cnts {
41 uint64_t icsb_fdblocks;
42 uint64_t icsb_ifree;
43 uint64_t icsb_icount;
44 unsigned long icsb_flags;
45} xfs_icsb_cnts_t;
46
47#define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */
48
49#define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */
50
51extern int xfs_icsb_init_counters(struct xfs_mount *);
52extern void xfs_icsb_reinit_counters(struct xfs_mount *);
53extern void xfs_icsb_destroy_counters(struct xfs_mount *);
54extern void xfs_icsb_sync_counters(struct xfs_mount *, int);
55extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
56extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t,
57 int64_t, int);
58
59#else
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)
67#endif
68
69/* dynamic preallocation free space thresholds, 5% down to 1% */
70enum {
71 XFS_LOWSP_1_PCNT = 0,
72 XFS_LOWSP_2_PCNT,
73 XFS_LOWSP_3_PCNT,
74 XFS_LOWSP_4_PCNT,
75 XFS_LOWSP_5_PCNT,
76 XFS_LOWSP_MAX,
77};
78
79typedef 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 */
166#endif
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
170 trimming */
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 */
175
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;
182} xfs_mount_t;
183
184/*
185 * Flags for m_flags.
186 */
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
196 allocations */
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
202 * 32 bits in size */
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
208 * allocation */
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
214 allocator */
215#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
216
217
218/*
219 * Default minimum read and write sizes.
220 */
221#define XFS_READIO_LOG_LARGE 16
222#define XFS_WRITEIO_LOG_LARGE 16
223
224/*
225 * Max and min values for mount-option defined I/O
226 * preallocation sizes.
227 */
228#define XFS_MAX_IO_LOG 30 /* 1G */
229#define XFS_MIN_IO_LOG PAGE_SHIFT
230
231/*
232 * Synchronous read and write sizes. This should be
233 * better for NFSv2 wsync filesystems.
234 */
235#define XFS_WSYNC_READIO_LOG 15 /* 32k */
236#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
237
238/*
239 * Allow large block sizes to be reported to userspace programs if the
240 * "largeio" mount option is used.
241 *
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.
244 * Otherwise....
245 *
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.
249 */
250static inline unsigned long
251xfs_preferred_iosize(xfs_mount_t *mp)
252{
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)) :
259 PAGE_CACHE_SIZE));
260}
261
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)
265void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
266 int lnnum);
267#define xfs_force_shutdown(m,f) \
268 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
269
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 */
276
277/*
278 * Flags for xfs_mountfs
279 */
280#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
281
282static inline xfs_agnumber_t
283xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
284{
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;
288}
289
290static inline xfs_agblock_t
291xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
292{
293 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
294 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
295}
296
297/*
298 * Per-cpu superblock locking functions
299 */
300#ifdef HAVE_PERCPU_SB
301static inline void
302xfs_icsb_lock(xfs_mount_t *mp)
303{
304 mutex_lock(&mp->m_icsb_mutex);
305}
306
307static inline void
308xfs_icsb_unlock(xfs_mount_t *mp)
309{
310 mutex_unlock(&mp->m_icsb_mutex);
311}
312#else
313#define xfs_icsb_lock(mp)
314#define xfs_icsb_unlock(mp)
315#endif
316
317/*
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
320 */
321typedef 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 */
324} xfs_mod_sb_t;
325
326/*
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.
332 */
333typedef 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 */
349
350 /*
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
354 */
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 */
360
361 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
362
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 */
368
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 */
372
373 /* for rcu-safe freeing */
374 struct rcu_head rcu_head;
375 int pagb_count; /* pagb slots in use */
376} xfs_perag_t;
377
378extern int xfs_log_sbcount(xfs_mount_t *);
379extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
380extern int xfs_mountfs(xfs_mount_t *mp);
381extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
382 xfs_agnumber_t *maxagi);
383
384extern void xfs_unmountfs(xfs_mount_t *);
385extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
386extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
387 uint, int);
388extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
389extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
390extern int xfs_readsb(xfs_mount_t *, int);
391extern void xfs_freesb(xfs_mount_t *);
392extern int xfs_fs_writable(xfs_mount_t *);
393extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
394
395extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
396
397extern void xfs_set_low_space_thresholds(struct xfs_mount *);
398
399#endif /* __KERNEL__ */
400
401#endif /* __XFS_MOUNT_H__ */