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v4.17
 
  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__ */
v6.13.7
  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;
 15struct xfs_perag;
 16
 17/* dynamic preallocation free space thresholds, 5% down to 1% */
 18enum {
 19	XFS_LOWSP_1_PCNT = 0,
 20	XFS_LOWSP_2_PCNT,
 21	XFS_LOWSP_3_PCNT,
 22	XFS_LOWSP_4_PCNT,
 23	XFS_LOWSP_5_PCNT,
 24	XFS_LOWSP_MAX,
 25};
 26
 27/*
 28 * Error Configuration
 29 *
 30 * Error classes define the subsystem the configuration belongs to.
 31 * Error numbers define the errors that are configurable.
 32 */
 33enum {
 34	XFS_ERR_METADATA,
 35	XFS_ERR_CLASS_MAX,
 36};
 37enum {
 38	XFS_ERR_DEFAULT,
 39	XFS_ERR_EIO,
 40	XFS_ERR_ENOSPC,
 41	XFS_ERR_ENODEV,
 42	XFS_ERR_ERRNO_MAX,
 43};
 44
 45#define XFS_ERR_RETRY_FOREVER	-1
 46
 47/*
 48 * Although retry_timeout is in jiffies which is normally an unsigned long,
 49 * we limit the retry timeout to 86400 seconds, or one day.  So even a
 50 * signed 32-bit long is sufficient for a HZ value up to 24855.  Making it
 51 * signed lets us store the special "-1" value, meaning retry forever.
 52 */
 53struct xfs_error_cfg {
 54	struct xfs_kobj	kobj;
 55	int		max_retries;
 56	long		retry_timeout;	/* in jiffies, -1 = infinite */
 57};
 58
 59/*
 60 * Per-cpu deferred inode inactivation GC lists.
 61 */
 62struct xfs_inodegc {
 63	struct xfs_mount	*mp;
 64	struct llist_head	list;
 65	struct delayed_work	work;
 66	int			error;
 67
 68	/* approximate count of inodes in the list */
 69	unsigned int		items;
 70	unsigned int		shrinker_hits;
 71	unsigned int		cpu;
 72};
 73
 74/*
 75 * Container for each type of groups, used to look up individual groups and
 76 * describes the geometry.
 77 */
 78struct xfs_groups {
 79	struct xarray		xa;
 80
 81	/*
 82	 * Maximum capacity of the group in FSBs.
 83	 *
 84	 * Each group is laid out densely in the daddr space.  For the
 85	 * degenerate case of a pre-rtgroups filesystem, the incore rtgroup
 86	 * pretends to have a zero-block and zero-blklog rtgroup.
 87	 */
 88	uint32_t		blocks;
 89
 90	/*
 91	 * Log(2) of the logical size of each group.
 92	 *
 93	 * Compared to the blocks field above this is rounded up to the next
 94	 * power of two, and thus lays out the xfs_fsblock_t/xfs_rtblock_t
 95	 * space sparsely with a hole from blocks to (1 << blklog) at the end
 96	 * of each group.
 97	 */
 98	uint8_t			blklog;
 99
100	/*
101	 * Mask to extract the group-relative block number from a FSB.
102	 * For a pre-rtgroups filesystem we pretend to have one very large
103	 * rtgroup, so this mask must be 64-bit.
104	 */
105	uint64_t		blkmask;
106};
107
108/*
109 * The struct xfsmount layout is optimised to separate read-mostly variables
110 * from variables that are frequently modified. We put the read-mostly variables
111 * first, then place all the other variables at the end.
112 *
113 * Typically, read-mostly variables are those that are set at mount time and
114 * never changed again, or only change rarely as a result of things like sysfs
115 * knobs being tweaked.
116 */
117typedef struct xfs_mount {
118	struct xfs_sb		m_sb;		/* copy of fs superblock */
119	struct super_block	*m_super;
 
120	struct xfs_ail		*m_ail;		/* fs active log item list */
 
 
 
 
 
 
 
121	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
122	struct xfs_buf		*m_rtsb_bp;	/* realtime superblock */
 
123	char			*m_rtname;	/* realtime device name */
124	char			*m_logname;	/* external log device name */
 
 
 
 
 
 
 
 
 
125	struct xfs_da_geometry	*m_dir_geo;	/* directory block geometry */
126	struct xfs_da_geometry	*m_attr_geo;	/* attribute block geometry */
127	struct xlog		*m_log;		/* log specific stuff */
 
 
 
 
 
 
128	struct xfs_inode	*m_rootip;	/* pointer to root directory */
129	struct xfs_inode	*m_metadirip;	/* ptr to metadata directory */
130	struct xfs_inode	*m_rtdirip;	/* ptr to realtime metadir */
131	struct xfs_quotainfo	*m_quotainfo;	/* disk quota information */
132	struct xfs_buftarg	*m_ddev_targp;	/* data device */
133	struct xfs_buftarg	*m_logdev_targp;/* log device */
134	struct xfs_buftarg	*m_rtdev_targp;	/* rt device */
135	void __percpu		*m_inodegc;	/* percpu inodegc structures */
136	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
137	struct workqueue_struct *m_buf_workqueue;
138	struct workqueue_struct	*m_unwritten_workqueue;
139	struct workqueue_struct	*m_reclaim_workqueue;
140	struct workqueue_struct	*m_sync_workqueue;
141	struct workqueue_struct *m_blockgc_wq;
142	struct workqueue_struct *m_inodegc_wq;
143
144	int			m_bsize;	/* fs logical block size */
145	uint8_t			m_blkbit_log;	/* blocklog + NBBY */
146	uint8_t			m_blkbb_log;	/* blocklog - BBSHIFT */
147	uint8_t			m_agno_log;	/* log #ag's */
148	uint8_t			m_sectbb_log;	/* sectlog - BBSHIFT */
149	int8_t			m_rtxblklog;	/* log2 of rextsize, if possible */
150
151	uint			m_blockmask;	/* sb_blocksize-1 */
152	uint			m_blockwsize;	/* sb_blocksize in words */
153	/* number of rt extents per rt bitmap block if rtgroups enabled */
154	unsigned int		m_rtx_per_rbmblock;
155	uint			m_alloc_mxr[2];	/* max alloc btree records */
156	uint			m_alloc_mnr[2];	/* min alloc btree records */
157	uint			m_bmap_dmxr[2];	/* max bmap btree records */
158	uint			m_bmap_dmnr[2];	/* min bmap btree records */
 
 
159	uint			m_rmap_mxr[2];	/* max rmap btree records */
160	uint			m_rmap_mnr[2];	/* min rmap btree records */
161	uint			m_refc_mxr[2];	/* max refc btree records */
162	uint			m_refc_mnr[2];	/* min refc btree records */
163	uint			m_alloc_maxlevels; /* max alloc btree levels */
164	uint			m_bm_maxlevels[2]; /* max bmap btree levels */
 
165	uint			m_rmap_maxlevels; /* max rmap btree levels */
166	uint			m_refc_maxlevels; /* max refcount btree level */
167	unsigned int		m_agbtree_maxlevels; /* max level of all AG btrees */
168	xfs_extlen_t		m_ag_prealloc_blocks; /* reserved ag blocks */
169	uint			m_alloc_set_aside; /* space we can't use */
170	uint			m_ag_max_usable; /* max space per AG */
171	int			m_dalign;	/* stripe unit */
172	int			m_swidth;	/* stripe width */
173	xfs_agnumber_t		m_maxagi;	/* highest inode alloc group */
174	uint			m_allocsize_log;/* min write size log bytes */
175	uint			m_allocsize_blocks; /* min write size blocks */
176	int			m_logbufs;	/* number of log buffers */
177	int			m_logbsize;	/* size of each log buffer */
178	unsigned int		m_rsumlevels;	/* rt summary levels */
179	xfs_filblks_t		m_rsumblocks;	/* size of rt summary, FSBs */
180	int			m_fixedfsid[2];	/* unchanged for life of FS */
 
 
 
 
 
 
 
181	uint			m_qflags;	/* quota status flags */
182	uint64_t		m_features;	/* active filesystem features */
183	uint64_t		m_low_space[XFS_LOWSP_MAX];
184	uint64_t		m_low_rtexts[XFS_LOWSP_MAX];
185	uint64_t		m_rtxblkmask;	/* rt extent block mask */
186	struct xfs_ino_geometry	m_ino_geo;	/* inode geometry */
187	struct xfs_trans_resv	m_resv;		/* precomputed res values */
188						/* low free space thresholds */
189	unsigned long		m_opstate;	/* dynamic state flags */
190	bool			m_always_cow;
191	bool			m_fail_unmount;
192	bool			m_finobt_nores; /* no per-AG finobt resv. */
193	bool			m_update_sb;	/* sb needs update in mount */
194
195	/*
196	 * Bitsets of per-fs metadata that have been checked and/or are sick.
197	 * Callers must hold m_sb_lock to access these two fields.
198	 */
199	uint8_t			m_fs_checked;
200	uint8_t			m_fs_sick;
201	/*
202	 * Bitsets of rt metadata that have been checked and/or are sick.
203	 * Callers must hold m_sb_lock to access this field.
204	 */
205	uint8_t			m_rt_checked;
206	uint8_t			m_rt_sick;
207
208	/*
209	 * End of read-mostly variables. Frequently written variables and locks
210	 * should be placed below this comment from now on. The first variable
211	 * here is marked as cacheline aligned so they it is separated from
212	 * the read-mostly variables.
213	 */
214
215	spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */
216	struct percpu_counter	m_icount;	/* allocated inodes counter */
217	struct percpu_counter	m_ifree;	/* free inodes counter */
218	struct percpu_counter	m_fdblocks;	/* free block counter */
219	struct percpu_counter	m_frextents;	/* free rt extent counter */
220
221	/*
222	 * Count of data device blocks reserved for delayed allocations,
223	 * including indlen blocks.  Does not include allocated CoW staging
224	 * extents or anything related to the rt device.
225	 */
226	struct percpu_counter	m_delalloc_blks;
227
228	/*
229	 * RT version of the above.
230	 */
231	struct percpu_counter	m_delalloc_rtextents;
232
233	/*
234	 * Global count of allocation btree blocks in use across all AGs. Only
235	 * used when perag reservation is enabled. Helps prevent block
236	 * reservation from attempting to reserve allocation btree blocks.
237	 */
238	atomic64_t		m_allocbt_blks;
239
240	struct xfs_groups	m_groups[XG_TYPE_MAX];
241	uint64_t		m_resblks;	/* total reserved blocks */
242	uint64_t		m_resblks_avail;/* available reserved blocks */
243	uint64_t		m_resblks_save;	/* reserved blks @ remount,ro */
 
 
 
 
 
 
 
 
 
 
244	struct delayed_work	m_reclaim_work;	/* background inode reclaim */
245	struct dentry		*m_debugfs;	/* debugfs parent */
 
 
 
 
 
 
246	struct xfs_kobj		m_kobj;
247	struct xfs_kobj		m_error_kobj;
248	struct xfs_kobj		m_error_meta_kobj;
249	struct xfs_error_cfg	m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
250	struct xstats		m_stats;	/* per-fs stats */
251#ifdef CONFIG_XFS_ONLINE_SCRUB_STATS
252	struct xchk_stats	*m_scrub_stats;
253#endif
254	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
255	atomic_t		m_agirotor;	/* last ag dir inode alloced */
256	atomic_t		m_rtgrotor;	/* last rtgroup rtpicked */
257
258	/* Memory shrinker to throttle and reprioritize inodegc */
259	struct shrinker		*m_inodegc_shrinker;
260	/*
261	 * Workqueue item so that we can coalesce multiple inode flush attempts
262	 * into a single flush.
263	 */
264	struct work_struct	m_flush_inodes_work;
 
265
266	/*
267	 * Generation of the filesysyem layout.  This is incremented by each
268	 * growfs, and used by the pNFS server to ensure the client updates
269	 * its view of the block device once it gets a layout that might
270	 * reference the newly added blocks.  Does not need to be persistent
271	 * as long as we only allow file system size increments, but if we
272	 * ever support shrinks it would have to be persisted in addition
273	 * to various other kinds of pain inflicted on the pNFS server.
274	 */
275	uint32_t		m_generation;
276	struct mutex		m_growlock;	/* growfs mutex */
277
 
278#ifdef DEBUG
279	/*
280	 * Frequency with which errors are injected.  Replaces xfs_etest; the
281	 * value stored in here is the inverse of the frequency with which the
282	 * error triggers.  1 = always, 2 = half the time, etc.
283	 */
284	unsigned int		*m_errortag;
285	struct xfs_kobj		m_errortag_kobj;
286#endif
287
288	/* cpus that have inodes queued for inactivation */
289	struct cpumask		m_inodegc_cpumask;
290
291	/* Hook to feed dirent updates to an active online repair. */
292	struct xfs_hooks	m_dir_update_hooks;
293} xfs_mount_t;
294
295#define M_IGEO(mp)		(&(mp)->m_ino_geo)
296
297/*
298 * Flags for m_features.
299 *
300 * These are all the active features in the filesystem, regardless of how
301 * they are configured.
302 */
303#define XFS_FEAT_ATTR		(1ULL << 0)	/* xattrs present in fs */
304#define XFS_FEAT_NLINK		(1ULL << 1)	/* 32 bit link counts */
305#define XFS_FEAT_QUOTA		(1ULL << 2)	/* quota active */
306#define XFS_FEAT_ALIGN		(1ULL << 3)	/* inode alignment */
307#define XFS_FEAT_DALIGN		(1ULL << 4)	/* data alignment */
308#define XFS_FEAT_LOGV2		(1ULL << 5)	/* version 2 logs */
309#define XFS_FEAT_SECTOR		(1ULL << 6)	/* sector size > 512 bytes */
310#define XFS_FEAT_EXTFLG		(1ULL << 7)	/* unwritten extents */
311#define XFS_FEAT_ASCIICI	(1ULL << 8)	/* ASCII only case-insens. */
312#define XFS_FEAT_LAZYSBCOUNT	(1ULL << 9)	/* Superblk counters */
313#define XFS_FEAT_ATTR2		(1ULL << 10)	/* dynamic attr fork */
314#define XFS_FEAT_PARENT		(1ULL << 11)	/* parent pointers */
315#define XFS_FEAT_PROJID32	(1ULL << 12)	/* 32 bit project id */
316#define XFS_FEAT_CRC		(1ULL << 13)	/* metadata CRCs */
317#define XFS_FEAT_V3INODES	(1ULL << 14)	/* Version 3 inodes */
318#define XFS_FEAT_PQUOTINO	(1ULL << 15)	/* non-shared proj/grp quotas */
319#define XFS_FEAT_FTYPE		(1ULL << 16)	/* inode type in dir */
320#define XFS_FEAT_FINOBT		(1ULL << 17)	/* free inode btree */
321#define XFS_FEAT_RMAPBT		(1ULL << 18)	/* reverse map btree */
322#define XFS_FEAT_REFLINK	(1ULL << 19)	/* reflinked files */
323#define XFS_FEAT_SPINODES	(1ULL << 20)	/* sparse inode chunks */
324#define XFS_FEAT_META_UUID	(1ULL << 21)	/* metadata UUID */
325#define XFS_FEAT_REALTIME	(1ULL << 22)	/* realtime device present */
326#define XFS_FEAT_INOBTCNT	(1ULL << 23)	/* inobt block counts */
327#define XFS_FEAT_BIGTIME	(1ULL << 24)	/* large timestamps */
328#define XFS_FEAT_NEEDSREPAIR	(1ULL << 25)	/* needs xfs_repair */
329#define XFS_FEAT_NREXT64	(1ULL << 26)	/* large extent counters */
330#define XFS_FEAT_EXCHANGE_RANGE	(1ULL << 27)	/* exchange range */
331#define XFS_FEAT_METADIR	(1ULL << 28)	/* metadata directory tree */
332
333/* Mount features */
334#define XFS_FEAT_NOATTR2	(1ULL << 48)	/* disable attr2 creation */
335#define XFS_FEAT_NOALIGN	(1ULL << 49)	/* ignore alignment */
336#define XFS_FEAT_ALLOCSIZE	(1ULL << 50)	/* user specified allocation size */
337#define XFS_FEAT_LARGE_IOSIZE	(1ULL << 51)	/* report large preferred
338						 * I/O size in stat() */
339#define XFS_FEAT_WSYNC		(1ULL << 52)	/* synchronous metadata ops */
340#define XFS_FEAT_DIRSYNC	(1ULL << 53)	/* synchronous directory ops */
341#define XFS_FEAT_DISCARD	(1ULL << 54)	/* discard unused blocks */
342#define XFS_FEAT_GRPID		(1ULL << 55)	/* group-ID assigned from directory */
343#define XFS_FEAT_SMALL_INUMS	(1ULL << 56)	/* user wants 32bit inodes */
344#define XFS_FEAT_IKEEP		(1ULL << 57)	/* keep empty inode clusters*/
345#define XFS_FEAT_SWALLOC	(1ULL << 58)	/* stripe width allocation */
346#define XFS_FEAT_FILESTREAMS	(1ULL << 59)	/* use filestreams allocator */
347#define XFS_FEAT_DAX_ALWAYS	(1ULL << 60)	/* DAX always enabled */
348#define XFS_FEAT_DAX_NEVER	(1ULL << 61)	/* DAX never enabled */
349#define XFS_FEAT_NORECOVERY	(1ULL << 62)	/* no recovery - dirty fs */
350#define XFS_FEAT_NOUUID		(1ULL << 63)	/* ignore uuid during mount */
351
352#define __XFS_HAS_FEAT(name, NAME) \
353static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
354{ \
355	return mp->m_features & XFS_FEAT_ ## NAME; \
356}
357
358/* Some features can be added dynamically so they need a set wrapper, too. */
359#define __XFS_ADD_FEAT(name, NAME) \
360	__XFS_HAS_FEAT(name, NAME); \
361static inline void xfs_add_ ## name (struct xfs_mount *mp) \
362{ \
363	mp->m_features |= XFS_FEAT_ ## NAME; \
364	xfs_sb_version_add ## name(&mp->m_sb); \
365}
366
367/* Superblock features */
368__XFS_ADD_FEAT(attr, ATTR)
369__XFS_HAS_FEAT(nlink, NLINK)
370__XFS_ADD_FEAT(quota, QUOTA)
371__XFS_HAS_FEAT(dalign, DALIGN)
372__XFS_HAS_FEAT(sector, SECTOR)
373__XFS_HAS_FEAT(asciici, ASCIICI)
374__XFS_HAS_FEAT(parent, PARENT)
375__XFS_HAS_FEAT(ftype, FTYPE)
376__XFS_HAS_FEAT(finobt, FINOBT)
377__XFS_HAS_FEAT(rmapbt, RMAPBT)
378__XFS_HAS_FEAT(reflink, REFLINK)
379__XFS_HAS_FEAT(sparseinodes, SPINODES)
380__XFS_HAS_FEAT(metauuid, META_UUID)
381__XFS_HAS_FEAT(realtime, REALTIME)
382__XFS_HAS_FEAT(inobtcounts, INOBTCNT)
383__XFS_HAS_FEAT(bigtime, BIGTIME)
384__XFS_HAS_FEAT(needsrepair, NEEDSREPAIR)
385__XFS_HAS_FEAT(large_extent_counts, NREXT64)
386__XFS_HAS_FEAT(exchange_range, EXCHANGE_RANGE)
387__XFS_HAS_FEAT(metadir, METADIR)
388
389static inline bool xfs_has_rtgroups(struct xfs_mount *mp)
390{
391	/* all metadir file systems also allow rtgroups */
392	return xfs_has_metadir(mp);
393}
394
395static inline bool xfs_has_rtsb(struct xfs_mount *mp)
396{
397	/* all rtgroups filesystems with an rt section have an rtsb */
398	return xfs_has_rtgroups(mp) && xfs_has_realtime(mp);
399}
400
401/*
402 * Some features are always on for v5 file systems, allow the compiler to
403 * eliminiate dead code when building without v4 support.
404 */
405#define __XFS_HAS_V4_FEAT(name, NAME) \
406static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
407{ \
408	return !IS_ENABLED(CONFIG_XFS_SUPPORT_V4) || \
409		(mp->m_features & XFS_FEAT_ ## NAME); \
410}
411
412#define __XFS_ADD_V4_FEAT(name, NAME) \
413	__XFS_HAS_V4_FEAT(name, NAME); \
414static inline void xfs_add_ ## name (struct xfs_mount *mp) \
415{ \
416	if (IS_ENABLED(CONFIG_XFS_SUPPORT_V4)) { \
417		mp->m_features |= XFS_FEAT_ ## NAME; \
418		xfs_sb_version_add ## name(&mp->m_sb); \
419	} \
420}
421
422__XFS_HAS_V4_FEAT(align, ALIGN)
423__XFS_HAS_V4_FEAT(logv2, LOGV2)
424__XFS_HAS_V4_FEAT(extflg, EXTFLG)
425__XFS_HAS_V4_FEAT(lazysbcount, LAZYSBCOUNT)
426__XFS_ADD_V4_FEAT(attr2, ATTR2)
427__XFS_ADD_V4_FEAT(projid32, PROJID32)
428__XFS_HAS_V4_FEAT(v3inodes, V3INODES)
429__XFS_HAS_V4_FEAT(crc, CRC)
430__XFS_HAS_V4_FEAT(pquotino, PQUOTINO)
431
432/*
433 * Mount features
434 *
435 * These do not change dynamically - features that can come and go, such as 32
436 * bit inodes and read-only state, are kept as operational state rather than
437 * features.
438 */
439__XFS_HAS_FEAT(noattr2, NOATTR2)
440__XFS_HAS_FEAT(noalign, NOALIGN)
441__XFS_HAS_FEAT(allocsize, ALLOCSIZE)
442__XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE)
443__XFS_HAS_FEAT(wsync, WSYNC)
444__XFS_HAS_FEAT(dirsync, DIRSYNC)
445__XFS_HAS_FEAT(discard, DISCARD)
446__XFS_HAS_FEAT(grpid, GRPID)
447__XFS_HAS_FEAT(small_inums, SMALL_INUMS)
448__XFS_HAS_FEAT(ikeep, IKEEP)
449__XFS_HAS_FEAT(swalloc, SWALLOC)
450__XFS_HAS_FEAT(filestreams, FILESTREAMS)
451__XFS_HAS_FEAT(dax_always, DAX_ALWAYS)
452__XFS_HAS_FEAT(dax_never, DAX_NEVER)
453__XFS_HAS_FEAT(norecovery, NORECOVERY)
454__XFS_HAS_FEAT(nouuid, NOUUID)
455
456/*
457 * Operational mount state flags
458 *
459 * Use these with atomic bit ops only!
460 */
461#define XFS_OPSTATE_UNMOUNTING		0	/* filesystem is unmounting */
462#define XFS_OPSTATE_CLEAN		1	/* mount was clean */
463#define XFS_OPSTATE_SHUTDOWN		2	/* stop all fs operations */
464#define XFS_OPSTATE_INODE32		3	/* inode32 allocator active */
465#define XFS_OPSTATE_READONLY		4	/* read-only fs */
466
467/*
468 * If set, inactivation worker threads will be scheduled to process queued
469 * inodegc work.  If not, queued inodes remain in memory waiting to be
470 * processed.
471 */
472#define XFS_OPSTATE_INODEGC_ENABLED	5
473/*
474 * If set, background speculative prealloc gc worker threads will be scheduled
475 * to process queued blockgc work.  If not, inodes retain their preallocations
476 * until explicitly deleted.
477 */
478#define XFS_OPSTATE_BLOCKGC_ENABLED	6
479
480/* Kernel has logged a warning about pNFS being used on this fs. */
481#define XFS_OPSTATE_WARNED_PNFS		7
482/* Kernel has logged a warning about online fsck being used on this fs. */
483#define XFS_OPSTATE_WARNED_SCRUB	8
484/* Kernel has logged a warning about shrink being used on this fs. */
485#define XFS_OPSTATE_WARNED_SHRINK	9
486/* Kernel has logged a warning about logged xattr updates being used. */
487#define XFS_OPSTATE_WARNED_LARP		10
488/* Mount time quotacheck is running */
489#define XFS_OPSTATE_QUOTACHECK_RUNNING	11
490/* Do we want to clear log incompat flags? */
491#define XFS_OPSTATE_UNSET_LOG_INCOMPAT	12
492/* Filesystem can use logged extended attributes */
493#define XFS_OPSTATE_USE_LARP		13
494/* Kernel has logged a warning about blocksize > pagesize on this fs. */
495#define XFS_OPSTATE_WARNED_LBS		14
496/* Kernel has logged a warning about exchange-range being used on this fs. */
497#define XFS_OPSTATE_WARNED_EXCHRANGE	15
498/* Kernel has logged a warning about parent pointers being used on this fs. */
499#define XFS_OPSTATE_WARNED_PPTR		16
500/* Kernel has logged a warning about metadata dirs being used on this fs. */
501#define XFS_OPSTATE_WARNED_METADIR	17
502/* Filesystem should use qflags to determine quotaon status */
503#define XFS_OPSTATE_RESUMING_QUOTAON	18
504
505#define __XFS_IS_OPSTATE(name, NAME) \
506static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
507{ \
508	return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
509} \
510static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
511{ \
512	return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
513} \
514static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
515{ \
516	return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
517}
518
519__XFS_IS_OPSTATE(unmounting, UNMOUNTING)
520__XFS_IS_OPSTATE(clean, CLEAN)
521__XFS_IS_OPSTATE(shutdown, SHUTDOWN)
522__XFS_IS_OPSTATE(inode32, INODE32)
523__XFS_IS_OPSTATE(readonly, READONLY)
524__XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)
525__XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED)
526#ifdef CONFIG_XFS_QUOTA
527__XFS_IS_OPSTATE(quotacheck_running, QUOTACHECK_RUNNING)
528__XFS_IS_OPSTATE(resuming_quotaon, RESUMING_QUOTAON)
529#else
530static inline bool xfs_is_quotacheck_running(struct xfs_mount *mp)
531{
532	return false;
533}
534static inline bool xfs_is_resuming_quotaon(struct xfs_mount *mp)
535{
536	return false;
537}
538static inline void xfs_set_resuming_quotaon(struct xfs_mount *m)
539{
540}
541static inline bool xfs_clear_resuming_quotaon(struct xfs_mount *mp)
542{
543	return false;
544}
545#endif /* CONFIG_XFS_QUOTA */
546__XFS_IS_OPSTATE(done_with_log_incompat, UNSET_LOG_INCOMPAT)
547__XFS_IS_OPSTATE(using_logged_xattrs, USE_LARP)
548
549static inline bool
550xfs_should_warn(struct xfs_mount *mp, long nr)
551{
552	return !test_and_set_bit(nr, &mp->m_opstate);
553}
554
555#define XFS_OPSTATE_STRINGS \
556	{ (1UL << XFS_OPSTATE_UNMOUNTING),		"unmounting" }, \
557	{ (1UL << XFS_OPSTATE_CLEAN),			"clean" }, \
558	{ (1UL << XFS_OPSTATE_SHUTDOWN),		"shutdown" }, \
559	{ (1UL << XFS_OPSTATE_INODE32),			"inode32" }, \
560	{ (1UL << XFS_OPSTATE_READONLY),		"read_only" }, \
561	{ (1UL << XFS_OPSTATE_INODEGC_ENABLED),		"inodegc" }, \
562	{ (1UL << XFS_OPSTATE_BLOCKGC_ENABLED),		"blockgc" }, \
563	{ (1UL << XFS_OPSTATE_WARNED_SCRUB),		"wscrub" }, \
564	{ (1UL << XFS_OPSTATE_WARNED_SHRINK),		"wshrink" }, \
565	{ (1UL << XFS_OPSTATE_WARNED_LARP),		"wlarp" }, \
566	{ (1UL << XFS_OPSTATE_QUOTACHECK_RUNNING),	"quotacheck" }, \
567	{ (1UL << XFS_OPSTATE_UNSET_LOG_INCOMPAT),	"unset_log_incompat" }, \
568	{ (1UL << XFS_OPSTATE_USE_LARP),		"logged_xattrs" }
569
570/*
571 * Max and min values for mount-option defined I/O
572 * preallocation sizes.
573 */
574#define XFS_MAX_IO_LOG		30	/* 1G */
575#define XFS_MIN_IO_LOG		PAGE_SHIFT
576
577void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname,
578		int lnnum);
579#define xfs_force_shutdown(m,f)	\
580	xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
581
582#define SHUTDOWN_META_IO_ERROR	(1u << 0) /* write attempt to metadata failed */
583#define SHUTDOWN_LOG_IO_ERROR	(1u << 1) /* write attempt to the log failed */
584#define SHUTDOWN_FORCE_UMOUNT	(1u << 2) /* shutdown from a forced unmount */
585#define SHUTDOWN_CORRUPT_INCORE	(1u << 3) /* corrupt in-memory structures */
586#define SHUTDOWN_CORRUPT_ONDISK	(1u << 4)  /* corrupt metadata on device */
587#define SHUTDOWN_DEVICE_REMOVED	(1u << 5) /* device removed underneath us */
588
589#define XFS_SHUTDOWN_STRINGS \
590	{ SHUTDOWN_META_IO_ERROR,	"metadata_io" }, \
591	{ SHUTDOWN_LOG_IO_ERROR,	"log_io" }, \
592	{ SHUTDOWN_FORCE_UMOUNT,	"force_umount" }, \
593	{ SHUTDOWN_CORRUPT_INCORE,	"corruption" }, \
594	{ SHUTDOWN_DEVICE_REMOVED,	"device_removed" }
595
596/*
597 * Flags for xfs_mountfs
598 */
599#define XFS_MFSI_QUIET		0x40	/* Be silent if mount errors found */
600
601static inline xfs_agnumber_t
602xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
603{
604	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
605	do_div(ld, mp->m_sb.sb_agblocks);
606	return (xfs_agnumber_t) ld;
607}
608
609static inline xfs_agblock_t
610xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
611{
612	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
613	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
614}
615
616extern void	xfs_uuid_table_free(void);
617extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
618extern int	xfs_mountfs(xfs_mount_t *mp);
619extern void	xfs_unmountfs(xfs_mount_t *);
 
 
 
620
621/*
622 * Deltas for the block count can vary from 1 to very large, but lock contention
623 * only occurs on frequent small block count updates such as in the delayed
624 * allocation path for buffered writes (page a time updates). Hence we set
625 * a large batch count (1024) to minimise global counter updates except when
626 * we get near to ENOSPC and we have to be very accurate with our updates.
627 */
628#define XFS_FDBLOCKS_BATCH	1024
629
630/*
631 * Estimate the amount of free space that is not available to userspace and is
632 * not explicitly reserved from the incore fdblocks.  This includes:
633 *
634 * - The minimum number of blocks needed to support splitting a bmap btree
635 * - The blocks currently in use by the freespace btrees because they record
636 *   the actual blocks that will fill per-AG metadata space reservations
637 */
638static inline uint64_t
639xfs_fdblocks_unavailable(
640	struct xfs_mount	*mp)
641{
642	return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
643}
644
645int xfs_dec_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
646		uint64_t delta, bool rsvd);
647void xfs_add_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
648		uint64_t delta);
649
650static inline int xfs_dec_fdblocks(struct xfs_mount *mp, uint64_t delta,
651		bool reserved)
652{
653	return xfs_dec_freecounter(mp, &mp->m_fdblocks, delta, reserved);
654}
655
656static inline void xfs_add_fdblocks(struct xfs_mount *mp, uint64_t delta)
657{
658	xfs_add_freecounter(mp, &mp->m_fdblocks, delta);
659}
660
661static inline int xfs_dec_frextents(struct xfs_mount *mp, uint64_t delta)
662{
663	return xfs_dec_freecounter(mp, &mp->m_frextents, delta, false);
664}
665
666static inline void xfs_add_frextents(struct xfs_mount *mp, uint64_t delta)
667{
668	xfs_add_freecounter(mp, &mp->m_frextents, delta);
669}
670
 
671extern int	xfs_readsb(xfs_mount_t *, int);
672extern void	xfs_freesb(xfs_mount_t *);
673extern bool	xfs_fs_writable(struct xfs_mount *mp, int level);
674extern int	xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
675
676extern int	xfs_dev_is_read_only(struct xfs_mount *, char *);
677
678extern void	xfs_set_low_space_thresholds(struct xfs_mount *);
679
680int	xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
681			xfs_off_t count_fsb);
682
683struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
684		int error_class, int error);
685void xfs_force_summary_recalc(struct xfs_mount *mp);
686int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature);
687bool xfs_clear_incompat_log_features(struct xfs_mount *mp);
688void xfs_mod_delalloc(struct xfs_inode *ip, int64_t data_delta,
689		int64_t ind_delta);
690
691#endif	/* __XFS_MOUNT_H__ */