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 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;
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
56 struct log;
57 struct xfs_mount_args;
58 struct xfs_inode;
59 struct xfs_bmbt_irec;
60 struct xfs_bmap_free;
61 struct xfs_extdelta;
62 struct xfs_swapext;
63 struct xfs_mru_cache;
64 struct xfs_nameops;
65 struct xfs_ail;
66 struct 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 */
77 typedef 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
88 extern int xfs_icsb_init_counters(struct xfs_mount *);
89 extern void xfs_icsb_reinit_counters(struct xfs_mount *);
90 extern void xfs_icsb_destroy_counters(struct xfs_mount *);
91 extern void xfs_icsb_sync_counters(struct xfs_mount *, int);
92 extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
93 extern 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% */
107 enum {
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
116 typedef 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
215 struct workqueue_struct *m_data_workqueue;
216 struct workqueue_struct *m_unwritten_workqueue;
217 } xfs_mount_t;
218
219 /*
220 * Flags for m_flags.
221 */
222 #define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
223 must be synchronous except
224 for space allocations */
225 #define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
226 #define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
227 operations, typically for
228 disk errors in metadata */
229 #define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
230 #define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to
231 user */
232 #define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
233 allocations */
234 #define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
235 #define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
236 #define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
237 #define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
238 #define XFS_MOUNT_32BITINODES (1ULL << 14) /* do not create inodes above
239 * 32 bits in size */
240 #define XFS_MOUNT_SMALL_INUMS (1ULL << 15) /* users wants 32bit inodes */
241 #define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
242 #define XFS_MOUNT_BARRIER (1ULL << 17)
243 #define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
244 #define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
245 * allocation */
246 #define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
247 #define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
248 #define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
249 * I/O size in stat() */
250 #define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
251 allocator */
252 #define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
253
254
255 /*
256 * Default minimum read and write sizes.
257 */
258 #define XFS_READIO_LOG_LARGE 16
259 #define XFS_WRITEIO_LOG_LARGE 16
260
261 /*
262 * Max and min values for mount-option defined I/O
263 * preallocation sizes.
264 */
265 #define XFS_MAX_IO_LOG 30 /* 1G */
266 #define XFS_MIN_IO_LOG PAGE_SHIFT
267
268 /*
269 * Synchronous read and write sizes. This should be
270 * better for NFSv2 wsync filesystems.
271 */
272 #define XFS_WSYNC_READIO_LOG 15 /* 32k */
273 #define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
274
275 /*
276 * Allow large block sizes to be reported to userspace programs if the
277 * "largeio" mount option is used.
278 *
279 * If compatibility mode is specified, simply return the basic unit of caching
280 * so that we don't get inefficient read/modify/write I/O from user apps.
281 * Otherwise....
282 *
283 * If the underlying volume is a stripe, then return the stripe width in bytes
284 * as the recommended I/O size. It is not a stripe and we've set a default
285 * buffered I/O size, return that, otherwise return the compat default.
286 */
287 static inline unsigned long
xfs_preferred_iosize(xfs_mount_t * mp)288 xfs_preferred_iosize(xfs_mount_t *mp)
289 {
290 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
291 return PAGE_CACHE_SIZE;
292 return (mp->m_swidth ?
293 (mp->m_swidth << mp->m_sb.sb_blocklog) :
294 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
295 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
296 PAGE_CACHE_SIZE));
297 }
298
299 #define XFS_MAXIOFFSET(mp) ((mp)->m_maxioffset)
300
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,
305 int lnnum);
306 #define xfs_force_shutdown(m,f) \
307 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
308
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 */
315
316 #define xfs_test_for_freeze(mp) ((mp)->m_super->s_frozen)
317 #define xfs_wait_for_freeze(mp,l) vfs_check_frozen((mp)->m_super, (l))
318
319 /*
320 * Flags for xfs_mountfs
321 */
322 #define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
323
324 static inline xfs_agnumber_t
xfs_daddr_to_agno(struct xfs_mount * mp,xfs_daddr_t d)325 xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
326 {
327 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
328 do_div(ld, mp->m_sb.sb_agblocks);
329 return (xfs_agnumber_t) ld;
330 }
331
332 static inline xfs_agblock_t
xfs_daddr_to_agbno(struct xfs_mount * mp,xfs_daddr_t d)333 xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
334 {
335 xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
336 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
337 }
338
339 /*
340 * perag get/put wrappers for ref counting
341 */
342 struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);
343 struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno,
344 int tag);
345 void xfs_perag_put(struct xfs_perag *pag);
346
347 /*
348 * Per-cpu superblock locking functions
349 */
350 #ifdef HAVE_PERCPU_SB
351 static inline void
xfs_icsb_lock(xfs_mount_t * mp)352 xfs_icsb_lock(xfs_mount_t *mp)
353 {
354 mutex_lock(&mp->m_icsb_mutex);
355 }
356
357 static inline void
xfs_icsb_unlock(xfs_mount_t * mp)358 xfs_icsb_unlock(xfs_mount_t *mp)
359 {
360 mutex_unlock(&mp->m_icsb_mutex);
361 }
362 #else
363 #define xfs_icsb_lock(mp)
364 #define xfs_icsb_unlock(mp)
365 #endif
366
367 /*
368 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
369 * xfs_growfs can specify a few fields which are more than int limit
370 */
371 typedef struct xfs_mod_sb {
372 xfs_sb_field_t msb_field; /* Field to modify, see below */
373 int64_t msb_delta; /* Change to make to specified field */
374 } xfs_mod_sb_t;
375
376 extern int xfs_log_sbcount(xfs_mount_t *);
377 extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
378 extern int xfs_mountfs(xfs_mount_t *mp);
379
380 extern void xfs_unmountfs(xfs_mount_t *);
381 extern int xfs_unmountfs_writesb(xfs_mount_t *);
382 extern int xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
383 extern int xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
384 uint, int);
385 extern int xfs_mount_log_sb(xfs_mount_t *, __int64_t);
386 extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
387 extern int xfs_readsb(xfs_mount_t *, int);
388 extern void xfs_freesb(xfs_mount_t *);
389 extern int xfs_fs_writable(xfs_mount_t *);
390 extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
391
392 extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
393
394 extern void xfs_set_low_space_thresholds(struct xfs_mount *);
395
396 #endif /* __KERNEL__ */
397
398 extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
399 extern int xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
400 xfs_agnumber_t *);
401 extern void xfs_sb_from_disk(struct xfs_mount *, struct xfs_dsb *);
402 extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
403
404 #endif /* __XFS_MOUNT_H__ */
405