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/*
  2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
  3 * All Rights Reserved.
  4 *
  5 * This program is free software; you can redistribute it and/or
  6 * modify it under the terms of the GNU General Public License as
  7 * published by the Free Software Foundation.
  8 *
  9 * This program is distributed in the hope that it would be useful,
 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12 * GNU General Public License for more details.
 13 *
 14 * You should have received a copy of the GNU General Public License
 15 * along with this program; if not, write the Free Software Foundation,
 16 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 17 */
 18#ifndef __XFS_MOUNT_H__
 19#define	__XFS_MOUNT_H__
 20
 21typedef struct xfs_trans_reservations {
 22	uint	tr_write;	/* extent alloc trans */
 23	uint	tr_itruncate;	/* truncate trans */
 24	uint	tr_rename;	/* rename trans */
 25	uint	tr_link;	/* link trans */
 26	uint	tr_remove;	/* unlink trans */
 27	uint	tr_symlink;	/* symlink trans */
 28	uint	tr_create;	/* create trans */
 29	uint	tr_mkdir;	/* mkdir trans */
 30	uint	tr_ifree;	/* inode free trans */
 31	uint	tr_ichange;	/* inode update trans */
 32	uint	tr_growdata;	/* fs data section grow trans */
 33	uint	tr_swrite;	/* sync write inode trans */
 34	uint	tr_addafork;	/* cvt inode to attributed trans */
 35	uint	tr_writeid;	/* write setuid/setgid file */
 36	uint	tr_attrinval;	/* attr fork buffer invalidation */
 37	uint	tr_attrset;	/* set/create an attribute */
 38	uint	tr_attrrm;	/* remove an attribute */
 39	uint	tr_clearagi;	/* clear bad agi unlinked ino bucket */
 40	uint	tr_growrtalloc;	/* grow realtime allocations */
 41	uint	tr_growrtzero;	/* grow realtime zeroing */
 42	uint	tr_growrtfree;	/* grow realtime freeing */
 43} xfs_trans_reservations_t;
 44
 45#ifndef __KERNEL__
 46
 47#define xfs_daddr_to_agno(mp,d) \
 48	((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
 49#define xfs_daddr_to_agbno(mp,d) \
 50	((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
 51
 52#else /* __KERNEL__ */
 53
 54#include "xfs_sync.h"
 55
 56struct xlog;
 57struct xfs_mount_args;
 58struct xfs_inode;
 59struct xfs_bmbt_irec;
 60struct xfs_bmap_free;
 61struct xfs_extdelta;
 62struct xfs_swapext;
 63struct xfs_mru_cache;
 64struct xfs_nameops;
 65struct xfs_ail;
 66struct xfs_quotainfo;
 67
 68#ifdef HAVE_PERCPU_SB
 69
 70/*
 71 * Valid per-cpu incore superblock counters. Note that if you add new counters,
 72 * you may need to define new counter disabled bit field descriptors as there
 73 * are more possible fields in the superblock that can fit in a bitfield on a
 74 * 32 bit platform. The XFS_SBS_* values for the current current counters just
 75 * fit.
 76 */
 77typedef struct xfs_icsb_cnts {
 78	uint64_t	icsb_fdblocks;
 79	uint64_t	icsb_ifree;
 80	uint64_t	icsb_icount;
 81	unsigned long	icsb_flags;
 82} xfs_icsb_cnts_t;
 83
 84#define XFS_ICSB_FLAG_LOCK	(1 << 0)	/* counter lock bit */
 85
 86#define XFS_ICSB_LAZY_COUNT	(1 << 1)	/* accuracy not needed */
 87
 88extern int	xfs_icsb_init_counters(struct xfs_mount *);
 89extern void	xfs_icsb_reinit_counters(struct xfs_mount *);
 90extern void	xfs_icsb_destroy_counters(struct xfs_mount *);
 91extern void	xfs_icsb_sync_counters(struct xfs_mount *, int);
 92extern void	xfs_icsb_sync_counters_locked(struct xfs_mount *, int);
 93extern int	xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t,
 94						int64_t, int);
 95
 96#else
 97#define xfs_icsb_init_counters(mp)		(0)
 98#define xfs_icsb_destroy_counters(mp)		do { } while (0)
 99#define xfs_icsb_reinit_counters(mp)		do { } while (0)
100#define xfs_icsb_sync_counters(mp, flags)	do { } while (0)
101#define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0)
102#define xfs_icsb_modify_counters(mp, field, delta, rsvd) \
103	xfs_mod_incore_sb(mp, field, delta, rsvd)
104#endif
105
106/* dynamic preallocation free space thresholds, 5% down to 1% */
107enum {
108	XFS_LOWSP_1_PCNT = 0,
109	XFS_LOWSP_2_PCNT,
110	XFS_LOWSP_3_PCNT,
111	XFS_LOWSP_4_PCNT,
112	XFS_LOWSP_5_PCNT,
113	XFS_LOWSP_MAX,
114};
115
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
116typedef struct xfs_mount {
117	struct super_block	*m_super;
118	xfs_tid_t		m_tid;		/* next unused tid for fs */
119	struct xfs_ail		*m_ail;		/* fs active log item list */
120	xfs_sb_t		m_sb;		/* copy of fs superblock */
 
121	spinlock_t		m_sb_lock;	/* sb counter lock */
 
 
 
 
122	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
123	char			*m_fsname;	/* filesystem name */
124	int			m_fsname_len;	/* strlen of fs name */
125	char			*m_rtname;	/* realtime device name */
126	char			*m_logname;	/* external log device name */
127	int			m_bsize;	/* fs logical block size */
128	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
129	xfs_agnumber_t		m_agirotor;	/* last ag dir inode alloced */
130	spinlock_t		m_agirotor_lock;/* .. and lock protecting it */
131	xfs_agnumber_t		m_maxagi;	/* highest inode alloc group */
132	uint			m_readio_log;	/* min read size log bytes */
133	uint			m_readio_blocks; /* min read size blocks */
134	uint			m_writeio_log;	/* min write size log bytes */
135	uint			m_writeio_blocks; /* min write size blocks */
 
 
136	struct xlog		*m_log;		/* log specific stuff */
137	int			m_logbufs;	/* number of log buffers */
138	int			m_logbsize;	/* size of each log buffer */
139	uint			m_rsumlevels;	/* rt summary levels */
140	uint			m_rsumsize;	/* size of rt summary, bytes */
141	struct xfs_inode	*m_rbmip;	/* pointer to bitmap inode */
142	struct xfs_inode	*m_rsumip;	/* pointer to summary inode */
143	struct xfs_inode	*m_rootip;	/* pointer to root directory */
144	struct xfs_quotainfo	*m_quotainfo;	/* disk quota information */
145	xfs_buftarg_t		*m_ddev_targp;	/* saves taking the address */
146	xfs_buftarg_t		*m_logdev_targp;/* ptr to log device */
147	xfs_buftarg_t		*m_rtdev_targp;	/* ptr to rt device */
148	__uint8_t		m_blkbit_log;	/* blocklog + NBBY */
149	__uint8_t		m_blkbb_log;	/* blocklog - BBSHIFT */
150	__uint8_t		m_agno_log;	/* log #ag's */
151	__uint8_t		m_agino_log;	/* #bits for agino in inum */
152	__uint16_t		m_inode_cluster_size;/* min inode buf size */
153	uint			m_blockmask;	/* sb_blocksize-1 */
154	uint			m_blockwsize;	/* sb_blocksize in words */
155	uint			m_blockwmask;	/* blockwsize-1 */
156	uint			m_alloc_mxr[2];	/* max alloc btree records */
157	uint			m_alloc_mnr[2];	/* min alloc btree records */
158	uint			m_bmap_dmxr[2];	/* max bmap btree records */
159	uint			m_bmap_dmnr[2];	/* min bmap btree records */
160	uint			m_inobt_mxr[2];	/* max inobt btree records */
161	uint			m_inobt_mnr[2];	/* min inobt btree records */
 
 
 
 
162	uint			m_ag_maxlevels;	/* XFS_AG_MAXLEVELS */
163	uint			m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
164	uint			m_in_maxlevels;	/* max inobt btree levels. */
 
 
 
 
 
165	struct radix_tree_root	m_perag_tree;	/* per-ag accounting info */
166	spinlock_t		m_perag_lock;	/* lock for m_perag_tree */
167	struct mutex		m_growlock;	/* growfs mutex */
168	int			m_fixedfsid[2];	/* unchanged for life of FS */
169	uint			m_dmevmask;	/* DMI events for this FS */
170	__uint64_t		m_flags;	/* global mount flags */
171	uint			m_dir_node_ents; /* #entries in a dir danode */
172	uint			m_attr_node_ents; /* #entries in attr danode */
173	int			m_ialloc_inos;	/* inodes in inode allocation */
174	int			m_ialloc_blks;	/* blocks in inode allocation */
 
 
175	int			m_inoalign_mask;/* mask sb_inoalignmt if used */
176	uint			m_qflags;	/* quota status flags */
177	xfs_trans_reservations_t m_reservations;/* precomputed res values */
178	__uint64_t		m_maxicount;	/* maximum inode count */
179	__uint64_t		m_maxioffset;	/* maximum inode offset */
180	__uint64_t		m_resblks;	/* total reserved blocks */
181	__uint64_t		m_resblks_avail;/* available reserved blocks */
182	__uint64_t		m_resblks_save;	/* reserved blks @ remount,ro */
183	int			m_dalign;	/* stripe unit */
184	int			m_swidth;	/* stripe width */
185	int			m_sinoalign;	/* stripe unit inode alignment */
186	int			m_attr_magicpct;/* 37% of the blocksize */
187	int			m_dir_magicpct;	/* 37% of the dir blocksize */
188	__uint8_t		m_sectbb_log;	/* sectlog - BBSHIFT */
189	const struct xfs_nameops *m_dirnameops;	/* vector of dir name ops */
190	int			m_dirblksize;	/* directory block sz--bytes */
191	int			m_dirblkfsbs;	/* directory block sz--fsbs */
192	xfs_dablk_t		m_dirdatablk;	/* blockno of dir data v2 */
193	xfs_dablk_t		m_dirleafblk;	/* blockno of dir non-data v2 */
194	xfs_dablk_t		m_dirfreeblk;	/* blockno of dirfreeindex v2 */
195	uint			m_chsize;	/* size of next field */
196	struct xfs_chash	*m_chash;	/* fs private inode per-cluster
197						 * hash table */
198	atomic_t		m_active_trans;	/* number trans frozen */
199#ifdef HAVE_PERCPU_SB
200	xfs_icsb_cnts_t __percpu *m_sb_cnts;	/* per-cpu superblock counters */
201	unsigned long		m_icsb_counters; /* disabled per-cpu counters */
202	struct notifier_block	m_icsb_notifier; /* hotplug cpu notifier */
203	struct mutex		m_icsb_mutex;	/* balancer sync lock */
204#endif
205	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
206	struct delayed_work	m_sync_work;	/* background sync work */
207	struct delayed_work	m_reclaim_work;	/* background inode reclaim */
208	struct work_struct	m_flush_work;	/* background inode flush */
209	__int64_t		m_update_flags;	/* sb flags we need to update
210						   on the next remount,rw */
211	struct shrinker		m_inode_shrink;	/* inode reclaim shrinker */
 
212	int64_t			m_low_space[XFS_LOWSP_MAX];
213						/* low free space thresholds */
 
 
 
 
 
214
 
215	struct workqueue_struct	*m_data_workqueue;
216	struct workqueue_struct	*m_unwritten_workqueue;
217	struct workqueue_struct	*m_cil_workqueue;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
218} xfs_mount_t;
219
220/*
221 * Flags for m_flags.
222 */
223#define XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
224						   must be synchronous except
225						   for space allocations */
 
226#define XFS_MOUNT_WAS_CLEAN	(1ULL << 3)
227#define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
228						   operations, typically for
229						   disk errors in metadata */
230#define XFS_MOUNT_DISCARD	(1ULL << 5)	/* discard unused blocks */
231#define XFS_MOUNT_RETERR	(1ULL << 6)     /* return alignment errors to
232						   user */
233#define XFS_MOUNT_NOALIGN	(1ULL << 7)	/* turn off stripe alignment
234						   allocations */
235#define XFS_MOUNT_ATTR2		(1ULL << 8)	/* allow use of attr2 format */
236#define XFS_MOUNT_GRPID		(1ULL << 9)	/* group-ID assigned from directory */
237#define XFS_MOUNT_NORECOVERY	(1ULL << 10)	/* no recovery - dirty fs */
238#define XFS_MOUNT_DFLT_IOSIZE	(1ULL << 12)	/* set default i/o size */
239#define XFS_MOUNT_32BITINODES	(1ULL << 14)	/* do not create inodes above
240						 * 32 bits in size */
241#define XFS_MOUNT_SMALL_INUMS	(1ULL << 15)	/* users wants 32bit inodes */
242#define XFS_MOUNT_NOUUID	(1ULL << 16)	/* ignore uuid during mount */
243#define XFS_MOUNT_BARRIER	(1ULL << 17)
244#define XFS_MOUNT_IKEEP		(1ULL << 18)	/* keep empty inode clusters*/
245#define XFS_MOUNT_SWALLOC	(1ULL << 19)	/* turn on stripe width
246						 * allocation */
247#define XFS_MOUNT_RDONLY	(1ULL << 20)	/* read-only fs */
248#define XFS_MOUNT_DIRSYNC	(1ULL << 21)	/* synchronous directory ops */
249#define XFS_MOUNT_COMPAT_IOSIZE	(1ULL << 22)	/* don't report large preferred
250						 * I/O size in stat() */
251#define XFS_MOUNT_FILESTREAMS	(1ULL << 24)	/* enable the filestreams
252						   allocator */
253#define XFS_MOUNT_NOATTR2	(1ULL << 25)	/* disable use of attr2 format */
254
 
 
255
256/*
257 * Default minimum read and write sizes.
258 */
259#define XFS_READIO_LOG_LARGE	16
260#define XFS_WRITEIO_LOG_LARGE	16
261
262/*
263 * Max and min values for mount-option defined I/O
264 * preallocation sizes.
265 */
266#define XFS_MAX_IO_LOG		30	/* 1G */
267#define XFS_MIN_IO_LOG		PAGE_SHIFT
268
269/*
270 * Synchronous read and write sizes.  This should be
271 * better for NFSv2 wsync filesystems.
272 */
273#define	XFS_WSYNC_READIO_LOG	15	/* 32k */
274#define	XFS_WSYNC_WRITEIO_LOG	14	/* 16k */
275
276/*
277 * Allow large block sizes to be reported to userspace programs if the
278 * "largeio" mount option is used.
279 *
280 * If compatibility mode is specified, simply return the basic unit of caching
281 * so that we don't get inefficient read/modify/write I/O from user apps.
282 * Otherwise....
283 *
284 * If the underlying volume is a stripe, then return the stripe width in bytes
285 * as the recommended I/O size. It is not a stripe and we've set a default
286 * buffered I/O size, return that, otherwise return the compat default.
287 */
288static inline unsigned long
289xfs_preferred_iosize(xfs_mount_t *mp)
290{
291	if (mp->m_flags & XFS_MOUNT_COMPAT_IOSIZE)
292		return PAGE_CACHE_SIZE;
293	return (mp->m_swidth ?
294		(mp->m_swidth << mp->m_sb.sb_blocklog) :
295		((mp->m_flags & XFS_MOUNT_DFLT_IOSIZE) ?
296			(1 << (int)MAX(mp->m_readio_log, mp->m_writeio_log)) :
297			PAGE_CACHE_SIZE));
298}
299
300#define XFS_MAXIOFFSET(mp)	((mp)->m_maxioffset)
301
302#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)	\
303				((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
304#define XFS_FORCED_SHUTDOWN(mp)	((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
305void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
306		int lnnum);
307#define xfs_force_shutdown(m,f)	\
308	xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
309
310#define SHUTDOWN_META_IO_ERROR	0x0001	/* write attempt to metadata failed */
311#define SHUTDOWN_LOG_IO_ERROR	0x0002	/* write attempt to the log failed */
312#define SHUTDOWN_FORCE_UMOUNT	0x0004	/* shutdown from a forced unmount */
313#define SHUTDOWN_CORRUPT_INCORE	0x0008	/* corrupt in-memory data structures */
314#define SHUTDOWN_REMOTE_REQ	0x0010	/* shutdown came from remote cell */
315#define SHUTDOWN_DEVICE_REQ	0x0020	/* failed all paths to the device */
316
317#define xfs_test_for_freeze(mp)		((mp)->m_super->s_frozen)
318#define xfs_wait_for_freeze(mp,l)	vfs_check_frozen((mp)->m_super, (l))
319
320/*
321 * Flags for xfs_mountfs
322 */
323#define XFS_MFSI_QUIET		0x40	/* Be silent if mount errors found */
324
325static inline xfs_agnumber_t
326xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
327{
328	xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
329	do_div(ld, mp->m_sb.sb_agblocks);
330	return (xfs_agnumber_t) ld;
331}
332
333static inline xfs_agblock_t
334xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
335{
336	xfs_daddr_t ld = XFS_BB_TO_FSBT(mp, d);
337	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
338}
339
340/*
341 * perag get/put wrappers for ref counting
342 */
343struct xfs_perag *xfs_perag_get(struct xfs_mount *mp, xfs_agnumber_t agno);
344struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno,
345					int tag);
346void	xfs_perag_put(struct xfs_perag *pag);
 
 
 
 
 
 
 
 
 
347
348/*
349 * Per-cpu superblock locking functions
 
350 */
351#ifdef HAVE_PERCPU_SB
352static inline void
353xfs_icsb_lock(xfs_mount_t *mp)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
354{
355	mutex_lock(&mp->m_icsb_mutex);
 
 
 
 
 
 
 
356}
357
358static inline void
359xfs_icsb_unlock(xfs_mount_t *mp)
360{
361	mutex_unlock(&mp->m_icsb_mutex);
362}
363#else
364#define xfs_icsb_lock(mp)
365#define xfs_icsb_unlock(mp)
366#endif
367
368/*
369 * This structure is for use by the xfs_mod_incore_sb_batch() routine.
370 * xfs_growfs can specify a few fields which are more than int limit
371 */
372typedef struct xfs_mod_sb {
373	xfs_sb_field_t	msb_field;	/* Field to modify, see below */
374	int64_t		msb_delta;	/* Change to make to specified field */
375} xfs_mod_sb_t;
376
 
377extern int	xfs_log_sbcount(xfs_mount_t *);
378extern __uint64_t xfs_default_resblks(xfs_mount_t *mp);
379extern int	xfs_mountfs(xfs_mount_t *mp);
 
 
 
 
 
 
 
 
 
380
381extern void	xfs_unmountfs(xfs_mount_t *);
382extern int	xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int64_t, int);
383extern int	xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,
384			uint, int);
385extern int	xfs_mount_log_sb(xfs_mount_t *, __int64_t);
386extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
387extern int	xfs_readsb(xfs_mount_t *, int);
388extern void	xfs_freesb(xfs_mount_t *);
389extern int	xfs_fs_writable(xfs_mount_t *);
390extern int	xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
391
392extern int	xfs_dev_is_read_only(struct xfs_mount *, char *);
393
394extern void	xfs_set_low_space_thresholds(struct xfs_mount *);
395
396#endif	/* __KERNEL__ */
 
397
398extern void	xfs_mod_sb(struct xfs_trans *, __int64_t);
399extern int	xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
400					xfs_agnumber_t *);
401extern void	xfs_sb_from_disk(struct xfs_mount *, struct xfs_dsb *);
402extern void	xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
403
404#endif	/* __XFS_MOUNT_H__ */