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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
21struct xlog;
22struct xfs_inode;
23struct xfs_mru_cache;
24struct xfs_nameops;
25struct xfs_ail;
26struct xfs_quotainfo;
27struct xfs_dir_ops;
28struct xfs_da_geometry;
29
30/* dynamic preallocation free space thresholds, 5% down to 1% */
31enum {
32 XFS_LOWSP_1_PCNT = 0,
33 XFS_LOWSP_2_PCNT,
34 XFS_LOWSP_3_PCNT,
35 XFS_LOWSP_4_PCNT,
36 XFS_LOWSP_5_PCNT,
37 XFS_LOWSP_MAX,
38};
39
40/*
41 * Error Configuration
42 *
43 * Error classes define the subsystem the configuration belongs to.
44 * Error numbers define the errors that are configurable.
45 */
46enum {
47 XFS_ERR_METADATA,
48 XFS_ERR_CLASS_MAX,
49};
50enum {
51 XFS_ERR_DEFAULT,
52 XFS_ERR_EIO,
53 XFS_ERR_ENOSPC,
54 XFS_ERR_ENODEV,
55 XFS_ERR_ERRNO_MAX,
56};
57
58#define XFS_ERR_RETRY_FOREVER -1
59
60/*
61 * Although retry_timeout is in jiffies which is normally an unsigned long,
62 * we limit the retry timeout to 86400 seconds, or one day. So even a
63 * signed 32-bit long is sufficient for a HZ value up to 24855. Making it
64 * signed lets us store the special "-1" value, meaning retry forever.
65 */
66struct xfs_error_cfg {
67 struct xfs_kobj kobj;
68 int max_retries;
69 long retry_timeout; /* in jiffies, -1 = infinite */
70};
71
72typedef struct xfs_mount {
73 struct super_block *m_super;
74 xfs_tid_t m_tid; /* next unused tid for fs */
75 struct xfs_ail *m_ail; /* fs active log item list */
76
77 struct xfs_sb m_sb; /* copy of fs superblock */
78 spinlock_t m_sb_lock; /* sb counter lock */
79 struct percpu_counter m_icount; /* allocated inodes counter */
80 struct percpu_counter m_ifree; /* free inodes counter */
81 struct percpu_counter m_fdblocks; /* free block counter */
82
83 struct xfs_buf *m_sb_bp; /* buffer for superblock */
84 char *m_fsname; /* filesystem name */
85 int m_fsname_len; /* strlen of fs name */
86 char *m_rtname; /* realtime device name */
87 char *m_logname; /* external log device name */
88 int m_bsize; /* fs logical block size */
89 xfs_agnumber_t m_agfrotor; /* last ag where space found */
90 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
91 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
92 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
93 uint m_readio_log; /* min read size log bytes */
94 uint m_readio_blocks; /* min read size blocks */
95 uint m_writeio_log; /* min write size log bytes */
96 uint m_writeio_blocks; /* min write size blocks */
97 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
98 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
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_rmap_mxr[2]; /* max rmap btree records */
126 uint m_rmap_mnr[2]; /* min rmap btree records */
127 uint m_refc_mxr[2]; /* max refc btree records */
128 uint m_refc_mnr[2]; /* min refc btree records */
129 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
130 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
131 uint m_in_maxlevels; /* max inobt btree levels. */
132 uint m_rmap_maxlevels; /* max rmap btree levels */
133 uint m_refc_maxlevels; /* max refcount btree level */
134 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
135 uint m_alloc_set_aside; /* space we can't use */
136 uint m_ag_max_usable; /* max space per AG */
137 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
138 spinlock_t m_perag_lock; /* lock for m_perag_tree */
139 struct mutex m_growlock; /* growfs mutex */
140 int m_fixedfsid[2]; /* unchanged for life of FS */
141 uint64_t m_flags; /* global mount flags */
142 bool m_inotbt_nores; /* no per-AG finobt resv. */
143 int m_ialloc_inos; /* inodes in inode allocation */
144 int m_ialloc_blks; /* blocks in inode allocation */
145 int m_ialloc_min_blks;/* min blocks in sparse inode
146 * allocation */
147 int m_inoalign_mask;/* mask sb_inoalignmt if used */
148 uint m_qflags; /* quota status flags */
149 struct xfs_trans_resv m_resv; /* precomputed res values */
150 uint64_t m_maxicount; /* maximum inode count */
151 uint64_t m_resblks; /* total reserved blocks */
152 uint64_t m_resblks_avail;/* available reserved blocks */
153 uint64_t m_resblks_save; /* reserved blks @ remount,ro */
154 int m_dalign; /* stripe unit */
155 int m_swidth; /* stripe width */
156 int m_sinoalign; /* stripe unit inode alignment */
157 uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
158 const struct xfs_nameops *m_dirnameops; /* vector of dir name ops */
159 const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
160 const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
161 uint m_chsize; /* size of next field */
162 atomic_t m_active_trans; /* number trans frozen */
163 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
164 struct delayed_work m_reclaim_work; /* background inode reclaim */
165 struct delayed_work m_eofblocks_work; /* background eof blocks
166 trimming */
167 struct delayed_work m_cowblocks_work; /* background cow blocks
168 trimming */
169 bool m_update_sb; /* sb needs update in mount */
170 int64_t m_low_space[XFS_LOWSP_MAX];
171 /* low free space thresholds */
172 struct xfs_kobj m_kobj;
173 struct xfs_kobj m_error_kobj;
174 struct xfs_kobj m_error_meta_kobj;
175 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
176 struct xstats m_stats; /* per-fs stats */
177
178 struct workqueue_struct *m_buf_workqueue;
179 struct workqueue_struct *m_data_workqueue;
180 struct workqueue_struct *m_unwritten_workqueue;
181 struct workqueue_struct *m_cil_workqueue;
182 struct workqueue_struct *m_reclaim_workqueue;
183 struct workqueue_struct *m_log_workqueue;
184 struct workqueue_struct *m_eofblocks_workqueue;
185 struct workqueue_struct *m_sync_workqueue;
186
187 /*
188 * Generation of the filesysyem layout. This is incremented by each
189 * growfs, and used by the pNFS server to ensure the client updates
190 * its view of the block device once it gets a layout that might
191 * reference the newly added blocks. Does not need to be persistent
192 * as long as we only allow file system size increments, but if we
193 * ever support shrinks it would have to be persisted in addition
194 * to various other kinds of pain inflicted on the pNFS server.
195 */
196 uint32_t m_generation;
197
198 bool m_fail_unmount;
199#ifdef DEBUG
200 /*
201 * Frequency with which errors are injected. Replaces xfs_etest; the
202 * value stored in here is the inverse of the frequency with which the
203 * error triggers. 1 = always, 2 = half the time, etc.
204 */
205 unsigned int *m_errortag;
206 struct xfs_kobj m_errortag_kobj;
207#endif
208} xfs_mount_t;
209
210/*
211 * Flags for m_flags.
212 */
213#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
214 must be synchronous except
215 for space allocations */
216#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */
217#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
218#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
219 operations, typically for
220 disk errors in metadata */
221#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
222#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
223 allocations */
224#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
225#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
226#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
227#define XFS_MOUNT_DFLT_IOSIZE (1ULL << 12) /* set default i/o size */
228#define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */
229#define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */
230#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
231#define XFS_MOUNT_BARRIER (1ULL << 17)
232#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
233#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
234 * allocation */
235#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
236#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
237#define XFS_MOUNT_COMPAT_IOSIZE (1ULL << 22) /* don't report large preferred
238 * I/O size in stat() */
239#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
240 allocator */
241#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
242
243#define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */
244
245
246/*
247 * Default minimum read and write sizes.
248 */
249#define XFS_READIO_LOG_LARGE 16
250#define XFS_WRITEIO_LOG_LARGE 16
251
252/*
253 * Max and min values for mount-option defined I/O
254 * preallocation sizes.
255 */
256#define XFS_MAX_IO_LOG 30 /* 1G */
257#define XFS_MIN_IO_LOG PAGE_SHIFT
258
259/*
260 * Synchronous read and write sizes. This should be
261 * better for NFSv2 wsync filesystems.
262 */
263#define XFS_WSYNC_READIO_LOG 15 /* 32k */
264#define XFS_WSYNC_WRITEIO_LOG 14 /* 16k */
265
266/*
267 * Allow large block sizes to be reported to userspace programs if the
268 * "largeio" mount option is used.
269 *
270 * If compatibility mode is specified, simply return the basic unit of caching
271 * so that we don't get inefficient read/modify/write I/O from user apps.
272 * Otherwise....
273 *
274 * If the underlying volume is a stripe, then return the stripe width in bytes
275 * as the recommended I/O size. It is not a stripe and we've set a default
276 * buffered I/O size, return that, otherwise return the compat default.
277 */
278static inline unsigned long
279xfs_preferred_iosize(xfs_mount_t *mp)
280{
281 if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
282 return PAGE_SIZE;
283 return (mp->m_swidth ?
284 (mp->m_swidth << mp->m_sb.sb_blocklog) :
285 ((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
286 (1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
287 PAGE_SIZE));
288}
289
290#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
291 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
292#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
293void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
294 int lnnum);
295#define xfs_force_shutdown(m,f) \
296 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
297
298#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
299#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
300#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
301#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
302#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
303#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
304
305/*
306 * Flags for xfs_mountfs
307 */
308#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
309
310static inline xfs_agnumber_t
311xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
312{
313 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
314 do_div(ld, mp->m_sb.sb_agblocks);
315 return (xfs_agnumber_t) ld;
316}
317
318static inline xfs_agblock_t
319xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
320{
321 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
322 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
323}
324
325/* per-AG block reservation data structures*/
326enum xfs_ag_resv_type {
327 XFS_AG_RESV_NONE = 0,
328 XFS_AG_RESV_AGFL,
329 XFS_AG_RESV_METADATA,
330 XFS_AG_RESV_RMAPBT,
331};
332
333struct xfs_ag_resv {
334 /* number of blocks originally reserved here */
335 xfs_extlen_t ar_orig_reserved;
336 /* number of blocks reserved here */
337 xfs_extlen_t ar_reserved;
338 /* number of blocks originally asked for */
339 xfs_extlen_t ar_asked;
340};
341
342/*
343 * Per-ag incore structure, copies of information in agf and agi, to improve the
344 * performance of allocation group selection.
345 */
346typedef struct xfs_perag {
347 struct xfs_mount *pag_mount; /* owner filesystem */
348 xfs_agnumber_t pag_agno; /* AG this structure belongs to */
349 atomic_t pag_ref; /* perag reference count */
350 char pagf_init; /* this agf's entry is initialized */
351 char pagi_init; /* this agi's entry is initialized */
352 char pagf_metadata; /* the agf is preferred to be metadata */
353 char pagi_inodeok; /* The agi is ok for inodes */
354 uint8_t pagf_levels[XFS_BTNUM_AGF];
355 /* # of levels in bno & cnt btree */
356 bool pagf_agflreset; /* agfl requires reset before use */
357 uint32_t pagf_flcount; /* count of blocks in freelist */
358 xfs_extlen_t pagf_freeblks; /* total free blocks */
359 xfs_extlen_t pagf_longest; /* longest free space */
360 uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
361 xfs_agino_t pagi_freecount; /* number of free inodes */
362 xfs_agino_t pagi_count; /* number of allocated inodes */
363
364 /*
365 * Inode allocation search lookup optimisation.
366 * If the pagino matches, the search for new inodes
367 * doesn't need to search the near ones again straight away
368 */
369 xfs_agino_t pagl_pagino;
370 xfs_agino_t pagl_leftrec;
371 xfs_agino_t pagl_rightrec;
372 spinlock_t pagb_lock; /* lock for pagb_tree */
373 struct rb_root pagb_tree; /* ordered tree of busy extents */
374 unsigned int pagb_gen; /* generation count for pagb_tree */
375 wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */
376
377 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
378
379 spinlock_t pag_ici_lock; /* incore inode cache lock */
380 struct radix_tree_root pag_ici_root; /* incore inode cache root */
381 int pag_ici_reclaimable; /* reclaimable inodes */
382 struct mutex pag_ici_reclaim_lock; /* serialisation point */
383 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
384
385 /* buffer cache index */
386 spinlock_t pag_buf_lock; /* lock for pag_buf_hash */
387 struct rhashtable pag_buf_hash;
388
389 /* for rcu-safe freeing */
390 struct rcu_head rcu_head;
391 int pagb_count; /* pagb slots in use */
392
393 /* Blocks reserved for all kinds of metadata. */
394 struct xfs_ag_resv pag_meta_resv;
395 /* Blocks reserved for the reverse mapping btree. */
396 struct xfs_ag_resv pag_rmapbt_resv;
397
398 /* reference count */
399 uint8_t pagf_refcount_level;
400} xfs_perag_t;
401
402static inline struct xfs_ag_resv *
403xfs_perag_resv(
404 struct xfs_perag *pag,
405 enum xfs_ag_resv_type type)
406{
407 switch (type) {
408 case XFS_AG_RESV_METADATA:
409 return &pag->pag_meta_resv;
410 case XFS_AG_RESV_RMAPBT:
411 return &pag->pag_rmapbt_resv;
412 default:
413 return NULL;
414 }
415}
416
417int xfs_buf_hash_init(xfs_perag_t *pag);
418void xfs_buf_hash_destroy(xfs_perag_t *pag);
419
420extern void xfs_uuid_table_free(void);
421extern int xfs_log_sbcount(xfs_mount_t *);
422extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
423extern int xfs_mountfs(xfs_mount_t *mp);
424extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
425 xfs_agnumber_t *maxagi);
426extern void xfs_unmountfs(xfs_mount_t *);
427
428extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
429extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta);
430extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
431 bool reserved);
432extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
433
434extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
435extern int xfs_readsb(xfs_mount_t *, int);
436extern void xfs_freesb(xfs_mount_t *);
437extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
438extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
439
440extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
441
442extern void xfs_set_low_space_thresholds(struct xfs_mount *);
443
444int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
445 xfs_off_t count_fsb);
446
447struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
448 int error_class, int error);
449
450#endif /* __XFS_MOUNT_H__ */
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6#ifndef __XFS_MOUNT_H__
7#define __XFS_MOUNT_H__
8
9struct xlog;
10struct xfs_inode;
11struct xfs_mru_cache;
12struct xfs_ail;
13struct xfs_quotainfo;
14struct xfs_da_geometry;
15
16/* dynamic preallocation free space thresholds, 5% down to 1% */
17enum {
18 XFS_LOWSP_1_PCNT = 0,
19 XFS_LOWSP_2_PCNT,
20 XFS_LOWSP_3_PCNT,
21 XFS_LOWSP_4_PCNT,
22 XFS_LOWSP_5_PCNT,
23 XFS_LOWSP_MAX,
24};
25
26/*
27 * Error Configuration
28 *
29 * Error classes define the subsystem the configuration belongs to.
30 * Error numbers define the errors that are configurable.
31 */
32enum {
33 XFS_ERR_METADATA,
34 XFS_ERR_CLASS_MAX,
35};
36enum {
37 XFS_ERR_DEFAULT,
38 XFS_ERR_EIO,
39 XFS_ERR_ENOSPC,
40 XFS_ERR_ENODEV,
41 XFS_ERR_ERRNO_MAX,
42};
43
44#define XFS_ERR_RETRY_FOREVER -1
45
46/*
47 * Although retry_timeout is in jiffies which is normally an unsigned long,
48 * we limit the retry timeout to 86400 seconds, or one day. So even a
49 * signed 32-bit long is sufficient for a HZ value up to 24855. Making it
50 * signed lets us store the special "-1" value, meaning retry forever.
51 */
52struct xfs_error_cfg {
53 struct xfs_kobj kobj;
54 int max_retries;
55 long retry_timeout; /* in jiffies, -1 = infinite */
56};
57
58/*
59 * The struct xfsmount layout is optimised to separate read-mostly variables
60 * from variables that are frequently modified. We put the read-mostly variables
61 * first, then place all the other variables at the end.
62 *
63 * Typically, read-mostly variables are those that are set at mount time and
64 * never changed again, or only change rarely as a result of things like sysfs
65 * knobs being tweaked.
66 */
67typedef struct xfs_mount {
68 struct xfs_sb m_sb; /* copy of fs superblock */
69 struct super_block *m_super;
70 struct xfs_ail *m_ail; /* fs active log item list */
71 struct xfs_buf *m_sb_bp; /* buffer for superblock */
72 char *m_rtname; /* realtime device name */
73 char *m_logname; /* external log device name */
74 struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
75 struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
76 struct xlog *m_log; /* log specific stuff */
77 struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
78 struct xfs_inode *m_rsumip; /* pointer to summary inode */
79 struct xfs_inode *m_rootip; /* pointer to root directory */
80 struct xfs_quotainfo *m_quotainfo; /* disk quota information */
81 xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
82 xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
83 xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
84 /*
85 * Optional cache of rt summary level per bitmap block with the
86 * invariant that m_rsum_cache[bbno] <= the minimum i for which
87 * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
88 * inode lock.
89 */
90 uint8_t *m_rsum_cache;
91 struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
92 struct workqueue_struct *m_buf_workqueue;
93 struct workqueue_struct *m_unwritten_workqueue;
94 struct workqueue_struct *m_cil_workqueue;
95 struct workqueue_struct *m_reclaim_workqueue;
96 struct workqueue_struct *m_eofblocks_workqueue;
97 struct workqueue_struct *m_sync_workqueue;
98
99 int m_bsize; /* fs logical block size */
100 uint8_t m_blkbit_log; /* blocklog + NBBY */
101 uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
102 uint8_t m_agno_log; /* log #ag's */
103 uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
104 uint m_blockmask; /* sb_blocksize-1 */
105 uint m_blockwsize; /* sb_blocksize in words */
106 uint m_blockwmask; /* blockwsize-1 */
107 uint m_alloc_mxr[2]; /* max alloc btree records */
108 uint m_alloc_mnr[2]; /* min alloc btree records */
109 uint m_bmap_dmxr[2]; /* max bmap btree records */
110 uint m_bmap_dmnr[2]; /* min bmap btree records */
111 uint m_rmap_mxr[2]; /* max rmap btree records */
112 uint m_rmap_mnr[2]; /* min rmap btree records */
113 uint m_refc_mxr[2]; /* max refc btree records */
114 uint m_refc_mnr[2]; /* min refc btree records */
115 uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
116 uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
117 uint m_rmap_maxlevels; /* max rmap btree levels */
118 uint m_refc_maxlevels; /* max refcount btree level */
119 xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
120 uint m_alloc_set_aside; /* space we can't use */
121 uint m_ag_max_usable; /* max space per AG */
122 int m_dalign; /* stripe unit */
123 int m_swidth; /* stripe width */
124 xfs_agnumber_t m_maxagi; /* highest inode alloc group */
125 uint m_allocsize_log;/* min write size log bytes */
126 uint m_allocsize_blocks; /* min write size blocks */
127 int m_logbufs; /* number of log buffers */
128 int m_logbsize; /* size of each log buffer */
129 uint m_rsumlevels; /* rt summary levels */
130 uint m_rsumsize; /* size of rt summary, bytes */
131 int m_fixedfsid[2]; /* unchanged for life of FS */
132 uint m_qflags; /* quota status flags */
133 uint64_t m_flags; /* global mount flags */
134 int64_t m_low_space[XFS_LOWSP_MAX];
135 struct xfs_ino_geometry m_ino_geo; /* inode geometry */
136 struct xfs_trans_resv m_resv; /* precomputed res values */
137 /* low free space thresholds */
138 bool m_always_cow;
139 bool m_fail_unmount;
140 bool m_finobt_nores; /* no per-AG finobt resv. */
141 bool m_update_sb; /* sb needs update in mount */
142
143 /*
144 * Bitsets of per-fs metadata that have been checked and/or are sick.
145 * Callers must hold m_sb_lock to access these two fields.
146 */
147 uint8_t m_fs_checked;
148 uint8_t m_fs_sick;
149 /*
150 * Bitsets of rt metadata that have been checked and/or are sick.
151 * Callers must hold m_sb_lock to access this field.
152 */
153 uint8_t m_rt_checked;
154 uint8_t m_rt_sick;
155
156 /*
157 * End of read-mostly variables. Frequently written variables and locks
158 * should be placed below this comment from now on. The first variable
159 * here is marked as cacheline aligned so they it is separated from
160 * the read-mostly variables.
161 */
162
163 spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */
164 struct percpu_counter m_icount; /* allocated inodes counter */
165 struct percpu_counter m_ifree; /* free inodes counter */
166 struct percpu_counter m_fdblocks; /* free block counter */
167 /*
168 * Count of data device blocks reserved for delayed allocations,
169 * including indlen blocks. Does not include allocated CoW staging
170 * extents or anything related to the rt device.
171 */
172 struct percpu_counter m_delalloc_blks;
173
174 struct radix_tree_root m_perag_tree; /* per-ag accounting info */
175 spinlock_t m_perag_lock; /* lock for m_perag_tree */
176 uint64_t m_resblks; /* total reserved blocks */
177 uint64_t m_resblks_avail;/* available reserved blocks */
178 uint64_t m_resblks_save; /* reserved blks @ remount,ro */
179 struct delayed_work m_reclaim_work; /* background inode reclaim */
180 struct delayed_work m_eofblocks_work; /* background eof blocks
181 trimming */
182 struct delayed_work m_cowblocks_work; /* background cow blocks
183 trimming */
184 struct xfs_kobj m_kobj;
185 struct xfs_kobj m_error_kobj;
186 struct xfs_kobj m_error_meta_kobj;
187 struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
188 struct xstats m_stats; /* per-fs stats */
189 xfs_agnumber_t m_agfrotor; /* last ag where space found */
190 xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
191 spinlock_t m_agirotor_lock;/* .. and lock protecting it */
192
193 /*
194 * Workqueue item so that we can coalesce multiple inode flush attempts
195 * into a single flush.
196 */
197 struct work_struct m_flush_inodes_work;
198
199 /*
200 * Generation of the filesysyem layout. This is incremented by each
201 * growfs, and used by the pNFS server to ensure the client updates
202 * its view of the block device once it gets a layout that might
203 * reference the newly added blocks. Does not need to be persistent
204 * as long as we only allow file system size increments, but if we
205 * ever support shrinks it would have to be persisted in addition
206 * to various other kinds of pain inflicted on the pNFS server.
207 */
208 uint32_t m_generation;
209 struct mutex m_growlock; /* growfs mutex */
210
211#ifdef DEBUG
212 /*
213 * Frequency with which errors are injected. Replaces xfs_etest; the
214 * value stored in here is the inverse of the frequency with which the
215 * error triggers. 1 = always, 2 = half the time, etc.
216 */
217 unsigned int *m_errortag;
218 struct xfs_kobj m_errortag_kobj;
219#endif
220} xfs_mount_t;
221
222#define M_IGEO(mp) (&(mp)->m_ino_geo)
223
224/*
225 * Flags for m_flags.
226 */
227#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
228 must be synchronous except
229 for space allocations */
230#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */
231#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
232#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
233 operations, typically for
234 disk errors in metadata */
235#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
236#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
237 allocations */
238#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
239#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
240#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
241#define XFS_MOUNT_ALLOCSIZE (1ULL << 12) /* specified allocation size */
242#define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */
243#define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */
244#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
245#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
246#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
247 * allocation */
248#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
249#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
250#define XFS_MOUNT_LARGEIO (1ULL << 22) /* report large preferred
251 * I/O size in stat() */
252#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
253 allocator */
254#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
255#define XFS_MOUNT_DAX_ALWAYS (1ULL << 26)
256#define XFS_MOUNT_DAX_NEVER (1ULL << 27)
257
258/*
259 * Max and min values for mount-option defined I/O
260 * preallocation sizes.
261 */
262#define XFS_MAX_IO_LOG 30 /* 1G */
263#define XFS_MIN_IO_LOG PAGE_SHIFT
264
265#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
266 ((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
267#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
268void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
269 int lnnum);
270#define xfs_force_shutdown(m,f) \
271 xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
272
273#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
274#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
275#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
276#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
277
278/*
279 * Flags for xfs_mountfs
280 */
281#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
282
283static inline xfs_agnumber_t
284xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
285{
286 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
287 do_div(ld, mp->m_sb.sb_agblocks);
288 return (xfs_agnumber_t) ld;
289}
290
291static inline xfs_agblock_t
292xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
293{
294 xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
295 return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
296}
297
298/* per-AG block reservation data structures*/
299struct xfs_ag_resv {
300 /* number of blocks originally reserved here */
301 xfs_extlen_t ar_orig_reserved;
302 /* number of blocks reserved here */
303 xfs_extlen_t ar_reserved;
304 /* number of blocks originally asked for */
305 xfs_extlen_t ar_asked;
306};
307
308/*
309 * Per-ag incore structure, copies of information in agf and agi, to improve the
310 * performance of allocation group selection.
311 */
312typedef struct xfs_perag {
313 struct xfs_mount *pag_mount; /* owner filesystem */
314 xfs_agnumber_t pag_agno; /* AG this structure belongs to */
315 atomic_t pag_ref; /* perag reference count */
316 char pagf_init; /* this agf's entry is initialized */
317 char pagi_init; /* this agi's entry is initialized */
318 char pagf_metadata; /* the agf is preferred to be metadata */
319 char pagi_inodeok; /* The agi is ok for inodes */
320 uint8_t pagf_levels[XFS_BTNUM_AGF];
321 /* # of levels in bno & cnt btree */
322 bool pagf_agflreset; /* agfl requires reset before use */
323 uint32_t pagf_flcount; /* count of blocks in freelist */
324 xfs_extlen_t pagf_freeblks; /* total free blocks */
325 xfs_extlen_t pagf_longest; /* longest free space */
326 uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
327 xfs_agino_t pagi_freecount; /* number of free inodes */
328 xfs_agino_t pagi_count; /* number of allocated inodes */
329
330 /*
331 * Inode allocation search lookup optimisation.
332 * If the pagino matches, the search for new inodes
333 * doesn't need to search the near ones again straight away
334 */
335 xfs_agino_t pagl_pagino;
336 xfs_agino_t pagl_leftrec;
337 xfs_agino_t pagl_rightrec;
338
339 /*
340 * Bitsets of per-ag metadata that have been checked and/or are sick.
341 * Callers should hold pag_state_lock before accessing this field.
342 */
343 uint16_t pag_checked;
344 uint16_t pag_sick;
345 spinlock_t pag_state_lock;
346
347 spinlock_t pagb_lock; /* lock for pagb_tree */
348 struct rb_root pagb_tree; /* ordered tree of busy extents */
349 unsigned int pagb_gen; /* generation count for pagb_tree */
350 wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */
351
352 atomic_t pagf_fstrms; /* # of filestreams active in this AG */
353
354 spinlock_t pag_ici_lock; /* incore inode cache lock */
355 struct radix_tree_root pag_ici_root; /* incore inode cache root */
356 int pag_ici_reclaimable; /* reclaimable inodes */
357 unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
358
359 /* buffer cache index */
360 spinlock_t pag_buf_lock; /* lock for pag_buf_hash */
361 struct rhashtable pag_buf_hash;
362
363 /* for rcu-safe freeing */
364 struct rcu_head rcu_head;
365 int pagb_count; /* pagb slots in use */
366
367 /* Blocks reserved for all kinds of metadata. */
368 struct xfs_ag_resv pag_meta_resv;
369 /* Blocks reserved for the reverse mapping btree. */
370 struct xfs_ag_resv pag_rmapbt_resv;
371
372 /* reference count */
373 uint8_t pagf_refcount_level;
374
375 /*
376 * Unlinked inode information. This incore information reflects
377 * data stored in the AGI, so callers must hold the AGI buffer lock
378 * or have some other means to control concurrency.
379 */
380 struct rhashtable pagi_unlinked_hash;
381} xfs_perag_t;
382
383static inline struct xfs_ag_resv *
384xfs_perag_resv(
385 struct xfs_perag *pag,
386 enum xfs_ag_resv_type type)
387{
388 switch (type) {
389 case XFS_AG_RESV_METADATA:
390 return &pag->pag_meta_resv;
391 case XFS_AG_RESV_RMAPBT:
392 return &pag->pag_rmapbt_resv;
393 default:
394 return NULL;
395 }
396}
397
398int xfs_buf_hash_init(xfs_perag_t *pag);
399void xfs_buf_hash_destroy(xfs_perag_t *pag);
400
401extern void xfs_uuid_table_free(void);
402extern int xfs_log_sbcount(xfs_mount_t *);
403extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
404extern int xfs_mountfs(xfs_mount_t *mp);
405extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
406 xfs_agnumber_t *maxagi);
407extern void xfs_unmountfs(xfs_mount_t *);
408
409extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
410 bool reserved);
411extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
412
413extern struct xfs_buf *xfs_getsb(xfs_mount_t *);
414extern int xfs_readsb(xfs_mount_t *, int);
415extern void xfs_freesb(xfs_mount_t *);
416extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
417extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
418
419extern int xfs_dev_is_read_only(struct xfs_mount *, char *);
420
421extern void xfs_set_low_space_thresholds(struct xfs_mount *);
422
423int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
424 xfs_off_t count_fsb);
425
426struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
427 int error_class, int error);
428void xfs_force_summary_recalc(struct xfs_mount *mp);
429void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
430
431#endif /* __XFS_MOUNT_H__ */