xfs_mount.h 16.1 KB
Newer Older
D
Dave Chinner 已提交
1
// SPDX-License-Identifier: GPL-2.0
L
Linus Torvalds 已提交
2
/*
3 4
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
L
Linus Torvalds 已提交
5 6 7 8
 */
#ifndef __XFS_MOUNT_H__
#define	__XFS_MOUNT_H__

9
struct xlog;
L
Linus Torvalds 已提交
10
struct xfs_inode;
11
struct xfs_mru_cache;
12
struct xfs_nameops;
D
David Chinner 已提交
13
struct xfs_ail;
C
Christoph Hellwig 已提交
14
struct xfs_quotainfo;
15
struct xfs_dir_ops;
16
struct xfs_da_geometry;
C
Christoph Hellwig 已提交
17

18 19 20 21 22 23 24 25 26 27
/* dynamic preallocation free space thresholds, 5% down to 1% */
enum {
	XFS_LOWSP_1_PCNT = 0,
	XFS_LOWSP_2_PCNT,
	XFS_LOWSP_3_PCNT,
	XFS_LOWSP_4_PCNT,
	XFS_LOWSP_5_PCNT,
	XFS_LOWSP_MAX,
};

28 29 30 31 32 33 34
/*
 * Error Configuration
 *
 * Error classes define the subsystem the configuration belongs to.
 * Error numbers define the errors that are configurable.
 */
enum {
35
	XFS_ERR_METADATA,
36 37 38
	XFS_ERR_CLASS_MAX,
};
enum {
39
	XFS_ERR_DEFAULT,
40 41 42
	XFS_ERR_EIO,
	XFS_ERR_ENOSPC,
	XFS_ERR_ENODEV,
43 44 45
	XFS_ERR_ERRNO_MAX,
};

46 47
#define XFS_ERR_RETRY_FOREVER	-1

48 49 50 51 52 53
/*
 * Although retry_timeout is in jiffies which is normally an unsigned long,
 * we limit the retry timeout to 86400 seconds, or one day.  So even a
 * signed 32-bit long is sufficient for a HZ value up to 24855.  Making it
 * signed lets us store the special "-1" value, meaning retry forever.
 */
54 55 56
struct xfs_error_cfg {
	struct xfs_kobj	kobj;
	int		max_retries;
57
	long		retry_timeout;	/* in jiffies, -1 = infinite */
58 59
};

L
Linus Torvalds 已提交
60
typedef struct xfs_mount {
C
Christoph Hellwig 已提交
61
	struct super_block	*m_super;
L
Linus Torvalds 已提交
62
	xfs_tid_t		m_tid;		/* next unused tid for fs */
D
David Chinner 已提交
63
	struct xfs_ail		*m_ail;		/* fs active log item list */
64 65

	struct xfs_sb		m_sb;		/* copy of fs superblock */
E
Eric Sandeen 已提交
66
	spinlock_t		m_sb_lock;	/* sb counter lock */
67
	struct percpu_counter	m_icount;	/* allocated inodes counter */
68
	struct percpu_counter	m_ifree;	/* free inodes counter */
69
	struct percpu_counter	m_fdblocks;	/* free block counter */
70

L
Linus Torvalds 已提交
71 72 73
	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
	char			*m_fsname;	/* filesystem name */
	int			m_fsname_len;	/* strlen of fs name */
74 75
	char			*m_rtname;	/* realtime device name */
	char			*m_logname;	/* external log device name */
L
Linus Torvalds 已提交
76 77 78
	int			m_bsize;	/* fs logical block size */
	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
	xfs_agnumber_t		m_agirotor;	/* last ag dir inode alloced */
E
Eric Sandeen 已提交
79
	spinlock_t		m_agirotor_lock;/* .. and lock protecting it */
L
Linus Torvalds 已提交
80 81 82 83 84
	xfs_agnumber_t		m_maxagi;	/* highest inode alloc group */
	uint			m_readio_log;	/* min read size log bytes */
	uint			m_readio_blocks; /* min read size blocks */
	uint			m_writeio_log;	/* min write size log bytes */
	uint			m_writeio_blocks; /* min write size blocks */
85 86
	struct xfs_da_geometry	*m_dir_geo;	/* directory block geometry */
	struct xfs_da_geometry	*m_attr_geo;	/* attribute block geometry */
87
	struct xlog		*m_log;		/* log specific stuff */
L
Linus Torvalds 已提交
88 89 90 91 92 93 94 95 96 97 98
	int			m_logbufs;	/* number of log buffers */
	int			m_logbsize;	/* size of each log buffer */
	uint			m_rsumlevels;	/* rt summary levels */
	uint			m_rsumsize;	/* size of rt summary, bytes */
	struct xfs_inode	*m_rbmip;	/* pointer to bitmap inode */
	struct xfs_inode	*m_rsumip;	/* pointer to summary inode */
	struct xfs_inode	*m_rootip;	/* pointer to root directory */
	struct xfs_quotainfo	*m_quotainfo;	/* disk quota information */
	xfs_buftarg_t		*m_ddev_targp;	/* saves taking the address */
	xfs_buftarg_t		*m_logdev_targp;/* ptr to log device */
	xfs_buftarg_t		*m_rtdev_targp;	/* ptr to rt device */
99 100 101 102
	uint8_t			m_blkbit_log;	/* blocklog + NBBY */
	uint8_t			m_blkbb_log;	/* blocklog - BBSHIFT */
	uint8_t			m_agno_log;	/* log #ag's */
	uint8_t			m_agino_log;	/* #bits for agino in inum */
103
	uint			m_inode_cluster_size;/* min inode buf size */
L
Linus Torvalds 已提交
104 105 106
	uint			m_blockmask;	/* sb_blocksize-1 */
	uint			m_blockwsize;	/* sb_blocksize in words */
	uint			m_blockwmask;	/* blockwsize-1 */
107 108 109 110 111 112
	uint			m_alloc_mxr[2];	/* max alloc btree records */
	uint			m_alloc_mnr[2];	/* min alloc btree records */
	uint			m_bmap_dmxr[2];	/* max bmap btree records */
	uint			m_bmap_dmnr[2];	/* min bmap btree records */
	uint			m_inobt_mxr[2];	/* max inobt btree records */
	uint			m_inobt_mnr[2];	/* min inobt btree records */
113 114
	uint			m_rmap_mxr[2];	/* max rmap btree records */
	uint			m_rmap_mnr[2];	/* min rmap btree records */
115 116
	uint			m_refc_mxr[2];	/* max refc btree records */
	uint			m_refc_mnr[2];	/* min refc btree records */
L
Linus Torvalds 已提交
117 118
	uint			m_ag_maxlevels;	/* XFS_AG_MAXLEVELS */
	uint			m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
119
	uint			m_in_maxlevels;	/* max inobt btree levels. */
120
	uint			m_rmap_maxlevels; /* max rmap btree levels */
121
	uint			m_refc_maxlevels; /* max refcount btree level */
122
	xfs_extlen_t		m_ag_prealloc_blocks; /* reserved ag blocks */
123 124
	uint			m_alloc_set_aside; /* space we can't use */
	uint			m_ag_max_usable; /* max space per AG */
125 126
	struct radix_tree_root	m_perag_tree;	/* per-ag accounting info */
	spinlock_t		m_perag_lock;	/* lock for m_perag_tree */
127
	struct mutex		m_growlock;	/* growfs mutex */
L
Linus Torvalds 已提交
128
	int			m_fixedfsid[2];	/* unchanged for life of FS */
129
	uint64_t		m_flags;	/* global mount flags */
130
	bool			m_inotbt_nores; /* no per-AG finobt resv. */
L
Linus Torvalds 已提交
131 132
	int			m_ialloc_inos;	/* inodes in inode allocation */
	int			m_ialloc_blks;	/* blocks in inode allocation */
133 134
	int			m_ialloc_min_blks;/* min blocks in sparse inode
						   * allocation */
L
Linus Torvalds 已提交
135 136
	int			m_inoalign_mask;/* mask sb_inoalignmt if used */
	uint			m_qflags;	/* quota status flags */
137
	struct xfs_trans_resv	m_resv;		/* precomputed res values */
138 139 140 141
	uint64_t		m_maxicount;	/* maximum inode count */
	uint64_t		m_resblks;	/* total reserved blocks */
	uint64_t		m_resblks_avail;/* available reserved blocks */
	uint64_t		m_resblks_save;	/* reserved blks @ remount,ro */
L
Linus Torvalds 已提交
142 143
	int			m_dalign;	/* stripe unit */
	int			m_swidth;	/* stripe width */
144
	int			m_sinoalign;	/* stripe unit inode alignment */
145
	uint8_t			m_sectbb_log;	/* sectlog - BBSHIFT */
146
	const struct xfs_nameops *m_dirnameops;	/* vector of dir name ops */
147
	const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
D
Dave Chinner 已提交
148
	const struct xfs_dir_ops *m_nondir_inode_ops; /* !dir inode ops */
L
Linus Torvalds 已提交
149 150
	uint			m_chsize;	/* size of next field */
	atomic_t		m_active_trans;	/* number trans frozen */
151
	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
152
	struct delayed_work	m_reclaim_work;	/* background inode reclaim */
153 154
	struct delayed_work	m_eofblocks_work; /* background eof blocks
						     trimming */
155 156
	struct delayed_work	m_cowblocks_work; /* background cow blocks
						     trimming */
157
	bool			m_update_sb;	/* sb needs update in mount */
158 159
	int64_t			m_low_space[XFS_LOWSP_MAX];
						/* low free space thresholds */
B
Brian Foster 已提交
160
	struct xfs_kobj		m_kobj;
161
	struct xfs_kobj		m_error_kobj;
162
	struct xfs_kobj		m_error_meta_kobj;
163
	struct xfs_error_cfg	m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
164
	struct xstats		m_stats;	/* per-fs stats */
165

166
	struct workqueue_struct *m_buf_workqueue;
167 168
	struct workqueue_struct	*m_data_workqueue;
	struct workqueue_struct	*m_unwritten_workqueue;
169
	struct workqueue_struct	*m_cil_workqueue;
D
Dave Chinner 已提交
170 171
	struct workqueue_struct	*m_reclaim_workqueue;
	struct workqueue_struct	*m_log_workqueue;
172
	struct workqueue_struct *m_eofblocks_workqueue;
173
	struct workqueue_struct	*m_sync_workqueue;
174 175 176 177 178 179 180 181 182 183

	/*
	 * Generation of the filesysyem layout.  This is incremented by each
	 * growfs, and used by the pNFS server to ensure the client updates
	 * its view of the block device once it gets a layout that might
	 * reference the newly added blocks.  Does not need to be persistent
	 * as long as we only allow file system size increments, but if we
	 * ever support shrinks it would have to be persisted in addition
	 * to various other kinds of pain inflicted on the pNFS server.
	 */
184
	uint32_t		m_generation;
185

186
	bool			m_fail_unmount;
187
#ifdef DEBUG
188 189 190 191 192 193
	/*
	 * Frequency with which errors are injected.  Replaces xfs_etest; the
	 * value stored in here is the inverse of the frequency with which the
	 * error triggers.  1 = always, 2 = half the time, etc.
	 */
	unsigned int		*m_errortag;
194
	struct xfs_kobj		m_errortag_kobj;
195
#endif
L
Linus Torvalds 已提交
196 197 198 199 200
} xfs_mount_t;

/*
 * Flags for m_flags.
 */
D
David Chinner 已提交
201
#define XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
L
Linus Torvalds 已提交
202 203
						   must be synchronous except
						   for space allocations */
204
#define XFS_MOUNT_UNMOUNTING	(1ULL << 1)	/* filesystem is unmounting */
205
#define XFS_MOUNT_BAD_SUMMARY	(1ULL << 2)	/* summary counters are bad */
D
David Chinner 已提交
206
#define XFS_MOUNT_WAS_CLEAN	(1ULL << 3)
207
#define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
L
Linus Torvalds 已提交
208 209
						   operations, typically for
						   disk errors in metadata */
210
#define XFS_MOUNT_DISCARD	(1ULL << 5)	/* discard unused blocks */
211
#define XFS_MOUNT_NOALIGN	(1ULL << 7)	/* turn off stripe alignment
L
Linus Torvalds 已提交
212
						   allocations */
213
#define XFS_MOUNT_ATTR2		(1ULL << 8)	/* allow use of attr2 format */
214
#define XFS_MOUNT_GRPID		(1ULL << 9)	/* group-ID assigned from directory */
215 216
#define XFS_MOUNT_NORECOVERY	(1ULL << 10)	/* no recovery - dirty fs */
#define XFS_MOUNT_DFLT_IOSIZE	(1ULL << 12)	/* set default i/o size */
217 218
#define XFS_MOUNT_SMALL_INUMS	(1ULL << 14)	/* user wants 32bit inodes */
#define XFS_MOUNT_32BITINODES	(1ULL << 15)	/* inode32 allocator active */
219 220
#define XFS_MOUNT_NOUUID	(1ULL << 16)	/* ignore uuid during mount */
#define XFS_MOUNT_BARRIER	(1ULL << 17)
221
#define XFS_MOUNT_IKEEP		(1ULL << 18)	/* keep empty inode clusters*/
222
#define XFS_MOUNT_SWALLOC	(1ULL << 19)	/* turn on stripe width
L
Linus Torvalds 已提交
223
						 * allocation */
224
#define XFS_MOUNT_RDONLY	(1ULL << 20)	/* read-only fs */
225 226
#define XFS_MOUNT_DIRSYNC	(1ULL << 21)	/* synchronous directory ops */
#define XFS_MOUNT_COMPAT_IOSIZE	(1ULL << 22)	/* don't report large preferred
227
						 * I/O size in stat() */
228 229
#define XFS_MOUNT_FILESTREAMS	(1ULL << 24)	/* enable the filestreams
						   allocator */
230
#define XFS_MOUNT_NOATTR2	(1ULL << 25)	/* disable use of attr2 format */
231

D
Dave Chinner 已提交
232 233
#define XFS_MOUNT_DAX		(1ULL << 62)	/* TEST ONLY! */

L
Linus Torvalds 已提交
234 235 236 237 238 239 240 241

/*
 * Default minimum read and write sizes.
 */
#define XFS_READIO_LOG_LARGE	16
#define XFS_WRITEIO_LOG_LARGE	16

/*
242 243
 * Max and min values for mount-option defined I/O
 * preallocation sizes.
L
Linus Torvalds 已提交
244
 */
245
#define XFS_MAX_IO_LOG		30	/* 1G */
L
Linus Torvalds 已提交
246 247 248 249 250 251
#define XFS_MIN_IO_LOG		PAGE_SHIFT

/*
 * Synchronous read and write sizes.  This should be
 * better for NFSv2 wsync filesystems.
 */
M
Malcolm Parsons 已提交
252 253
#define	XFS_WSYNC_READIO_LOG	15	/* 32k */
#define	XFS_WSYNC_WRITEIO_LOG	14	/* 16k */
L
Linus Torvalds 已提交
254

255 256
/*
 * Allow large block sizes to be reported to userspace programs if the
257
 * "largeio" mount option is used.
258 259 260 261 262 263 264 265 266 267 268 269 270
 *
 * If compatibility mode is specified, simply return the basic unit of caching
 * so that we don't get inefficient read/modify/write I/O from user apps.
 * Otherwise....
 *
 * If the underlying volume is a stripe, then return the stripe width in bytes
 * as the recommended I/O size. It is not a stripe and we've set a default
 * buffered I/O size, return that, otherwise return the compat default.
 */
static inline unsigned long
xfs_preferred_iosize(xfs_mount_t *mp)
{
	if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
271
		return PAGE_SIZE;
272 273 274
	return (mp->m_swidth ?
		(mp->m_swidth << mp->m_sb.sb_blocklog) :
		((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
D
Dave Chinner 已提交
275
			(1 << (int)max(mp->m_readio_log, mp->m_writeio_log)) :
276
			PAGE_SIZE));
277 278
}

D
David Chinner 已提交
279 280
#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)	\
				((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
L
Linus Torvalds 已提交
281
#define XFS_FORCED_SHUTDOWN(mp)	((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
282 283
void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
		int lnnum);
L
Linus Torvalds 已提交
284
#define xfs_force_shutdown(m,f)	\
285
	xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
L
Linus Torvalds 已提交
286

C
Christoph Hellwig 已提交
287 288 289 290 291 292 293
#define SHUTDOWN_META_IO_ERROR	0x0001	/* write attempt to metadata failed */
#define SHUTDOWN_LOG_IO_ERROR	0x0002	/* write attempt to the log failed */
#define SHUTDOWN_FORCE_UMOUNT	0x0004	/* shutdown from a forced unmount */
#define SHUTDOWN_CORRUPT_INCORE	0x0008	/* corrupt in-memory data structures */
#define SHUTDOWN_REMOTE_REQ	0x0010	/* shutdown came from remote cell */
#define SHUTDOWN_DEVICE_REQ	0x0020	/* failed all paths to the device */

L
Linus Torvalds 已提交
294 295 296
/*
 * Flags for xfs_mountfs
 */
297
#define XFS_MFSI_QUIET		0x40	/* Be silent if mount errors found */
L
Linus Torvalds 已提交
298

299 300
static inline xfs_agnumber_t
xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
L
Linus Torvalds 已提交
301
{
E
Eric Sandeen 已提交
302
	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
303 304
	do_div(ld, mp->m_sb.sb_agblocks);
	return (xfs_agnumber_t) ld;
L
Linus Torvalds 已提交
305 306
}

307 308
static inline xfs_agblock_t
xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
L
Linus Torvalds 已提交
309
{
E
Eric Sandeen 已提交
310
	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
311
	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
L
Linus Torvalds 已提交
312 313
}

314 315 316
/* per-AG block reservation data structures*/
enum xfs_ag_resv_type {
	XFS_AG_RESV_NONE = 0,
317
	XFS_AG_RESV_AGFL,
318
	XFS_AG_RESV_METADATA,
319
	XFS_AG_RESV_RMAPBT,
320 321 322 323 324 325 326 327 328 329 330
};

struct xfs_ag_resv {
	/* number of blocks originally reserved here */
	xfs_extlen_t			ar_orig_reserved;
	/* number of blocks reserved here */
	xfs_extlen_t			ar_reserved;
	/* number of blocks originally asked for */
	xfs_extlen_t			ar_asked;
};

331 332
/*
 * Per-ag incore structure, copies of information in agf and agi, to improve the
333
 * performance of allocation group selection.
334 335 336 337 338 339 340 341 342
 */
typedef struct xfs_perag {
	struct xfs_mount *pag_mount;	/* owner filesystem */
	xfs_agnumber_t	pag_agno;	/* AG this structure belongs to */
	atomic_t	pag_ref;	/* perag reference count */
	char		pagf_init;	/* this agf's entry is initialized */
	char		pagi_init;	/* this agi's entry is initialized */
	char		pagf_metadata;	/* the agf is preferred to be metadata */
	char		pagi_inodeok;	/* The agi is ok for inodes */
343
	uint8_t		pagf_levels[XFS_BTNUM_AGF];
344
					/* # of levels in bno & cnt btree */
345
	bool		pagf_agflreset; /* agfl requires reset before use */
346
	uint32_t	pagf_flcount;	/* count of blocks in freelist */
347 348
	xfs_extlen_t	pagf_freeblks;	/* total free blocks */
	xfs_extlen_t	pagf_longest;	/* longest free space */
349
	uint32_t	pagf_btreeblks;	/* # of blocks held in AGF btrees */
350 351 352 353 354 355 356 357 358 359 360 361 362
	xfs_agino_t	pagi_freecount;	/* number of free inodes */
	xfs_agino_t	pagi_count;	/* number of allocated inodes */

	/*
	 * Inode allocation search lookup optimisation.
	 * If the pagino matches, the search for new inodes
	 * doesn't need to search the near ones again straight away
	 */
	xfs_agino_t	pagl_pagino;
	xfs_agino_t	pagl_leftrec;
	xfs_agino_t	pagl_rightrec;
	spinlock_t	pagb_lock;	/* lock for pagb_tree */
	struct rb_root	pagb_tree;	/* ordered tree of busy extents */
363 364
	unsigned int	pagb_gen;	/* generation count for pagb_tree */
	wait_queue_head_t pagb_wait;	/* woken when pagb_gen changes */
365 366 367 368 369 370 371 372 373 374

	atomic_t        pagf_fstrms;    /* # of filestreams active in this AG */

	spinlock_t	pag_ici_lock;	/* incore inode cache lock */
	struct radix_tree_root pag_ici_root;	/* incore inode cache root */
	int		pag_ici_reclaimable;	/* reclaimable inodes */
	struct mutex	pag_ici_reclaim_lock;	/* serialisation point */
	unsigned long	pag_ici_reclaim_cursor;	/* reclaim restart point */

	/* buffer cache index */
375 376
	spinlock_t	pag_buf_lock;	/* lock for pag_buf_hash */
	struct rhashtable pag_buf_hash;
377 378 379 380

	/* for rcu-safe freeing */
	struct rcu_head	rcu_head;
	int		pagb_count;	/* pagb slots in use */
381 382 383

	/* Blocks reserved for all kinds of metadata. */
	struct xfs_ag_resv	pag_meta_resv;
384 385
	/* Blocks reserved for the reverse mapping btree. */
	struct xfs_ag_resv	pag_rmapbt_resv;
386 387

	/* reference count */
388
	uint8_t			pagf_refcount_level;
389 390
} xfs_perag_t;

391 392 393 394 395 396 397 398
static inline struct xfs_ag_resv *
xfs_perag_resv(
	struct xfs_perag	*pag,
	enum xfs_ag_resv_type	type)
{
	switch (type) {
	case XFS_AG_RESV_METADATA:
		return &pag->pag_meta_resv;
399 400
	case XFS_AG_RESV_RMAPBT:
		return &pag->pag_rmapbt_resv;
401 402 403 404 405
	default:
		return NULL;
	}
}

406 407 408
int xfs_buf_hash_init(xfs_perag_t *pag);
void xfs_buf_hash_destroy(xfs_perag_t *pag);

409
extern void	xfs_uuid_table_free(void);
410
extern int	xfs_log_sbcount(xfs_mount_t *);
411
extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
C
Christoph Hellwig 已提交
412
extern int	xfs_mountfs(xfs_mount_t *mp);
413 414
extern int	xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
				     xfs_agnumber_t *maxagi);
415
extern void	xfs_unmountfs(xfs_mount_t *);
D
Dave Chinner 已提交
416

417
extern int	xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
418
extern int	xfs_mod_ifree(struct xfs_mount *mp, int64_t delta);
419 420
extern int	xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
				 bool reserved);
D
Dave Chinner 已提交
421 422
extern int	xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);

L
Linus Torvalds 已提交
423
extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
424
extern int	xfs_readsb(xfs_mount_t *, int);
L
Linus Torvalds 已提交
425
extern void	xfs_freesb(xfs_mount_t *);
426
extern bool	xfs_fs_writable(struct xfs_mount *mp, int level);
427
extern int	xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
L
Linus Torvalds 已提交
428

C
Christoph Hellwig 已提交
429 430
extern int	xfs_dev_is_read_only(struct xfs_mount *, char *);

431 432
extern void	xfs_set_low_space_thresholds(struct xfs_mount *);

433 434 435
int	xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
			xfs_off_t count_fsb);

436 437 438
struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
		int error_class, int error);

L
Linus Torvalds 已提交
439
#endif	/* __XFS_MOUNT_H__ */