[people/ms/linux.git] / fs / xfs / xfs_mount.h

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#ifndef __XFS_MOUNT_H__
#define	__XFS_MOUNT_H__

struct xlog;
struct xfs_inode;
struct xfs_mru_cache;
struct xfs_ail;
struct xfs_quotainfo;
struct xfs_da_geometry;
struct xfs_perag;

/* 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,
};

/*
 * Error Configuration
 *
 * Error classes define the subsystem the configuration belongs to.
 * Error numbers define the errors that are configurable.
 */
enum {
	XFS_ERR_METADATA,
	XFS_ERR_CLASS_MAX,
};
enum {
	XFS_ERR_DEFAULT,
	XFS_ERR_EIO,
	XFS_ERR_ENOSPC,
	XFS_ERR_ENODEV,
	XFS_ERR_ERRNO_MAX,
};

#define XFS_ERR_RETRY_FOREVER	-1

/*
 * 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.
 */
struct xfs_error_cfg {
	struct xfs_kobj	kobj;
	int		max_retries;
	long		retry_timeout;	/* in jiffies, -1 = infinite */
};

/*
 * Per-cpu deferred inode inactivation GC lists.
 */
struct xfs_inodegc {
	struct llist_head	list;
	struct work_struct	work;

	/* approximate count of inodes in the list */
	unsigned int		items;
};

/*
 * The struct xfsmount layout is optimised to separate read-mostly variables
 * from variables that are frequently modified. We put the read-mostly variables
 * first, then place all the other variables at the end.
 *
 * Typically, read-mostly variables are those that are set at mount time and
 * never changed again, or only change rarely as a result of things like sysfs
 * knobs being tweaked.
 */
typedef struct xfs_mount {
	struct xfs_sb		m_sb;		/* copy of fs superblock */
	struct super_block	*m_super;
	struct xfs_ail		*m_ail;		/* fs active log item list */
	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
	char			*m_rtname;	/* realtime device name */
	char			*m_logname;	/* external log device name */
	struct xfs_da_geometry	*m_dir_geo;	/* directory block geometry */
	struct xfs_da_geometry	*m_attr_geo;	/* attribute block geometry */
	struct xlog		*m_log;		/* log specific stuff */
	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 */
	struct list_head	m_mount_list;	/* global mount list */
	void __percpu		*m_inodegc;	/* percpu inodegc structures */

	/*
	 * Optional cache of rt summary level per bitmap block with the
	 * invariant that m_rsum_cache[bbno] <= the minimum i for which
	 * rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
	 * inode lock.
	 */
	uint8_t			*m_rsum_cache;
	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
	struct workqueue_struct *m_buf_workqueue;
	struct workqueue_struct	*m_unwritten_workqueue;
	struct workqueue_struct	*m_cil_workqueue;
	struct workqueue_struct	*m_reclaim_workqueue;
	struct workqueue_struct	*m_sync_workqueue;
	struct workqueue_struct *m_blockgc_wq;
	struct workqueue_struct *m_inodegc_wq;

	int			m_bsize;	/* fs logical block size */
	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_sectbb_log;	/* sectlog - BBSHIFT */
	uint			m_blockmask;	/* sb_blocksize-1 */
	uint			m_blockwsize;	/* sb_blocksize in words */
	uint			m_blockwmask;	/* blockwsize-1 */
	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_rmap_mxr[2];	/* max rmap btree records */
	uint			m_rmap_mnr[2];	/* min rmap btree records */
	uint			m_refc_mxr[2];	/* max refc btree records */
	uint			m_refc_mnr[2];	/* min refc btree records */
	uint			m_ag_maxlevels;	/* XFS_AG_MAXLEVELS */
	uint			m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
	uint			m_rmap_maxlevels; /* max rmap btree levels */
	uint			m_refc_maxlevels; /* max refcount btree level */
	xfs_extlen_t		m_ag_prealloc_blocks; /* reserved ag blocks */
	uint			m_alloc_set_aside; /* space we can't use */
	uint			m_ag_max_usable; /* max space per AG */
	int			m_dalign;	/* stripe unit */
	int			m_swidth;	/* stripe width */
	xfs_agnumber_t		m_maxagi;	/* highest inode alloc group */
	uint			m_allocsize_log;/* min write size log bytes */
	uint			m_allocsize_blocks; /* min write size blocks */
	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 */
	int			m_fixedfsid[2];	/* unchanged for life of FS */
	uint			m_qflags;	/* quota status flags */
	uint64_t		m_flags;	/* global mount flags */
	int64_t			m_low_space[XFS_LOWSP_MAX];
	struct xfs_ino_geometry	m_ino_geo;	/* inode geometry */
	struct xfs_trans_resv	m_resv;		/* precomputed res values */
						/* low free space thresholds */
	unsigned long		m_opstate;	/* dynamic state flags */
	bool			m_always_cow;
	bool			m_fail_unmount;
	bool			m_finobt_nores; /* no per-AG finobt resv. */
	bool			m_update_sb;	/* sb needs update in mount */

	/*
	 * Bitsets of per-fs metadata that have been checked and/or are sick.
	 * Callers must hold m_sb_lock to access these two fields.
	 */
	uint8_t			m_fs_checked;
	uint8_t			m_fs_sick;
	/*
	 * Bitsets of rt metadata that have been checked and/or are sick.
	 * Callers must hold m_sb_lock to access this field.
	 */
	uint8_t			m_rt_checked;
	uint8_t			m_rt_sick;

	/*
	 * End of read-mostly variables. Frequently written variables and locks
	 * should be placed below this comment from now on. The first variable
	 * here is marked as cacheline aligned so they it is separated from
	 * the read-mostly variables.
	 */

	spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */
	struct percpu_counter	m_icount;	/* allocated inodes counter */
	struct percpu_counter	m_ifree;	/* free inodes counter */
	struct percpu_counter	m_fdblocks;	/* free block counter */
	/*
	 * Count of data device blocks reserved for delayed allocations,
	 * including indlen blocks.  Does not include allocated CoW staging
	 * extents or anything related to the rt device.
	 */
	struct percpu_counter	m_delalloc_blks;
	/*
	 * Global count of allocation btree blocks in use across all AGs. Only
	 * used when perag reservation is enabled. Helps prevent block
	 * reservation from attempting to reserve allocation btree blocks.
	 */
	atomic64_t		m_allocbt_blks;

	struct radix_tree_root	m_perag_tree;	/* per-ag accounting info */
	spinlock_t		m_perag_lock;	/* lock for m_perag_tree */
	uint64_t		m_resblks;	/* total reserved blocks */
	uint64_t		m_resblks_avail;/* available reserved blocks */
	uint64_t		m_resblks_save;	/* reserved blks @ remount,ro */
	struct delayed_work	m_reclaim_work;	/* background inode reclaim */
	struct xfs_kobj		m_kobj;
	struct xfs_kobj		m_error_kobj;
	struct xfs_kobj		m_error_meta_kobj;
	struct xfs_error_cfg	m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
	struct xstats		m_stats;	/* per-fs stats */
	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
	xfs_agnumber_t		m_agirotor;	/* last ag dir inode alloced */
	spinlock_t		m_agirotor_lock;/* .. and lock protecting it */

	/*
	 * Workqueue item so that we can coalesce multiple inode flush attempts
	 * into a single flush.
	 */
	struct work_struct	m_flush_inodes_work;

	/*
	 * 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.
	 */
	uint32_t		m_generation;
	struct mutex		m_growlock;	/* growfs mutex */

#ifdef DEBUG
	/*
	 * 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;
	struct xfs_kobj		m_errortag_kobj;
#endif
} xfs_mount_t;

#define M_IGEO(mp)		(&(mp)->m_ino_geo)

/*
 * Flags for m_flags.
 */
#define XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
						   must be synchronous except
						   for space allocations */
#define XFS_MOUNT_UNMOUNTING	(1ULL << 1)	/* filesystem is unmounting */
#define XFS_MOUNT_WAS_CLEAN	(1ULL << 3)
#define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
						   operations, typically for
						   disk errors in metadata */
#define XFS_MOUNT_DISCARD	(1ULL << 5)	/* discard unused blocks */
#define XFS_MOUNT_NOALIGN	(1ULL << 7)	/* turn off stripe alignment
						   allocations */
#define XFS_MOUNT_ATTR2		(1ULL << 8)	/* allow use of attr2 format */
#define XFS_MOUNT_GRPID		(1ULL << 9)	/* group-ID assigned from directory */
#define XFS_MOUNT_NORECOVERY	(1ULL << 10)	/* no recovery - dirty fs */
#define XFS_MOUNT_ALLOCSIZE	(1ULL << 12)	/* specified allocation size */
#define XFS_MOUNT_SMALL_INUMS	(1ULL << 14)	/* user wants 32bit inodes */
#define XFS_MOUNT_32BITINODES	(1ULL << 15)	/* inode32 allocator active */
#define XFS_MOUNT_NOUUID	(1ULL << 16)	/* ignore uuid during mount */
#define XFS_MOUNT_IKEEP		(1ULL << 18)	/* keep empty inode clusters*/
#define XFS_MOUNT_SWALLOC	(1ULL << 19)	/* turn on stripe width
						 * allocation */
#define XFS_MOUNT_RDONLY	(1ULL << 20)	/* read-only fs */
#define XFS_MOUNT_DIRSYNC	(1ULL << 21)	/* synchronous directory ops */
#define XFS_MOUNT_LARGEIO	(1ULL << 22)	/* report large preferred
						 * I/O size in stat() */
#define XFS_MOUNT_FILESTREAMS	(1ULL << 24)	/* enable the filestreams
						   allocator */
#define XFS_MOUNT_NOATTR2	(1ULL << 25)	/* disable use of attr2 format */
#define XFS_MOUNT_DAX_ALWAYS	(1ULL << 26)
#define XFS_MOUNT_DAX_NEVER	(1ULL << 27)

/*
 * If set, inactivation worker threads will be scheduled to process queued
 * inodegc work.  If not, queued inodes remain in memory waiting to be
 * processed.
 */
#define XFS_OPSTATE_INODEGC_ENABLED	0

#define __XFS_IS_OPSTATE(name, NAME) \
static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
{ \
	return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
} \
static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
{ \
	return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
} \
static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
{ \
	return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
}

__XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)

#define XFS_OPSTATE_STRINGS \
	{ (1UL << XFS_OPSTATE_INODEGC_ENABLED),		"inodegc" }

/*
 * Max and min values for mount-option defined I/O
 * preallocation sizes.
 */
#define XFS_MAX_IO_LOG		30	/* 1G */
#define XFS_MIN_IO_LOG		PAGE_SHIFT

#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp)	\
				((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
#define XFS_FORCED_SHUTDOWN(mp)	((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname,
		int lnnum);
#define xfs_force_shutdown(m,f)	\
	xfs_do_force_shutdown(m, f, __FILE__, __LINE__)

#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 */

/*
 * Flags for xfs_mountfs
 */
#define XFS_MFSI_QUIET		0x40	/* Be silent if mount errors found */

static inline xfs_agnumber_t
xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
{
	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
	do_div(ld, mp->m_sb.sb_agblocks);
	return (xfs_agnumber_t) ld;
}

static inline xfs_agblock_t
xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
{
	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
}

int xfs_buf_hash_init(struct xfs_perag *pag);
void xfs_buf_hash_destroy(struct xfs_perag *pag);

extern void	xfs_uuid_table_free(void);
extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
extern int	xfs_mountfs(xfs_mount_t *mp);
extern void	xfs_unmountfs(xfs_mount_t *);

/*
 * Deltas for the block count can vary from 1 to very large, but lock contention
 * only occurs on frequent small block count updates such as in the delayed
 * allocation path for buffered writes (page a time updates). Hence we set
 * a large batch count (1024) to minimise global counter updates except when
 * we get near to ENOSPC and we have to be very accurate with our updates.
 */
#define XFS_FDBLOCKS_BATCH	1024

extern int	xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
				 bool reserved);
extern int	xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);

extern int	xfs_readsb(xfs_mount_t *, int);
extern void	xfs_freesb(xfs_mount_t *);
extern bool	xfs_fs_writable(struct xfs_mount *mp, int level);
extern int	xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);

extern int	xfs_dev_is_read_only(struct xfs_mount *, char *);

extern void	xfs_set_low_space_thresholds(struct xfs_mount *);

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

struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
		int error_class, int error);
void xfs_force_summary_recalc(struct xfs_mount *mp);
void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);

#endif	/* __XFS_MOUNT_H__ */
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
7b718769 NS	3	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
7b718769 NS	4	* All Rights Reserved.
1da177e4 LT	5	*/
	6	#ifndef __XFS_MOUNT_H__
	7	#define __XFS_MOUNT_H__
	8
ad223e60	9	struct xlog;
1da177e4	10	struct xfs_inode;
2a82b8be	11	struct xfs_mru_cache;
82fa9012	12	struct xfs_ail;
7d095257	13	struct xfs_quotainfo;
0650b554	14	struct xfs_da_geometry;
07b6403a	15	struct xfs_perag;
7d095257	16
055388a3 DC	17	/* dynamic preallocation free space thresholds, 5% down to 1% */
	18	enum {
	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
192852be CM	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	*/
	33	enum {
ffd40ef6	34	XFS_ERR_METADATA,
192852be CM	35	XFS_ERR_CLASS_MAX,
	36	};
	37	enum {
ffd40ef6	38	XFS_ERR_DEFAULT,
e0a431b3 CM	39	XFS_ERR_EIO,
	40	XFS_ERR_ENOSPC,
	41	XFS_ERR_ENODEV,
192852be CM	42	XFS_ERR_ERRNO_MAX,
	43	};
	44
a5ea70d2 CM	45	#define XFS_ERR_RETRY_FOREVER -1
a5ea70d2 CM	46
77169812 ES	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	*/
192852be CM	53	struct xfs_error_cfg {
	54	struct xfs_kobj kobj;
	55	int max_retries;
77169812	56	long retry_timeout; /* in jiffies, -1 = infinite */
192852be CM	57	};
192852be CM	58
ab23a776 DC	59	/*
	60	* Per-cpu deferred inode inactivation GC lists.
	61	*/
	62	struct xfs_inodegc {
	63	struct llist_head list;
	64	struct work_struct work;
	65
	66	/* approximate count of inodes in the list */
	67	unsigned int items;
	68	};
	69
b0dff466 DC	70	/*
	71	* The struct xfsmount layout is optimised to separate read-mostly variables
	72	* from variables that are frequently modified. We put the read-mostly variables
	73	* first, then place all the other variables at the end.
	74	*
	75	* Typically, read-mostly variables are those that are set at mount time and
	76	* never changed again, or only change rarely as a result of things like sysfs
	77	* knobs being tweaked.
	78	*/
1da177e4	79	typedef struct xfs_mount {
b0dff466	80	struct xfs_sb m_sb; /* copy of fs superblock */
b267ce99	81	struct super_block *m_super;
82fa9012	82	struct xfs_ail m_ail; / fs active log item list */
1da177e4	83	struct xfs_buf m_sb_bp; / buffer for superblock */
fc1f8c1c NS	84	char m_rtname; / realtime device name */
fc1f8c1c NS	85	char m_logname; / external log device name */
0650b554 DC	86	struct xfs_da_geometry m_dir_geo; / directory block geometry */
0650b554 DC	87	struct xfs_da_geometry m_attr_geo; / attribute block geometry */
ad223e60	88	struct xlog m_log; / log specific stuff */
1da177e4 LT	89	struct xfs_inode m_rbmip; / pointer to bitmap inode */
	90	struct xfs_inode m_rsumip; / pointer to summary inode */
	91	struct xfs_inode m_rootip; / pointer to root directory */
	92	struct xfs_quotainfo m_quotainfo; / disk quota information */
	93	xfs_buftarg_t m_ddev_targp; / saves taking the address */
	94	xfs_buftarg_t m_logdev_targp;/ ptr to log device */
	95	xfs_buftarg_t m_rtdev_targp; / ptr to rt device */
0ed17f01	96	struct list_head m_mount_list; /* global mount list */
ab23a776 DC	97	void __percpu m_inodegc; / percpu inodegc structures */
ab23a776 DC	98
b0dff466 DC	99	/*
	100	* Optional cache of rt summary level per bitmap block with the
	101	* invariant that m_rsum_cache[bbno] <= the minimum i for which
	102	* rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
	103	* inode lock.
	104	*/
	105	uint8_t *m_rsum_cache;
	106	struct xfs_mru_cache m_filestream; / per-mount filestream data */
	107	struct workqueue_struct *m_buf_workqueue;
	108	struct workqueue_struct *m_unwritten_workqueue;
	109	struct workqueue_struct *m_cil_workqueue;
	110	struct workqueue_struct *m_reclaim_workqueue;
b0dff466	111	struct workqueue_struct *m_sync_workqueue;
ab23a776 DC	112	struct workqueue_struct *m_blockgc_wq;
ab23a776 DC	113	struct workqueue_struct *m_inodegc_wq;
b0dff466 DC	114
b0dff466 DC	115	int m_bsize; /* fs logical block size */
c8ce540d DW	116	uint8_t m_blkbit_log; /* blocklog + NBBY */
	117	uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
	118	uint8_t m_agno_log; /* log #ag's */
b0dff466	119	uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
1da177e4 LT	120	uint m_blockmask; /* sb_blocksize-1 */
	121	uint m_blockwsize; /* sb_blocksize in words */
	122	uint m_blockwmask; /* blockwsize-1 */
60197e8d CH	123	uint m_alloc_mxr[2]; /* max alloc btree records */
	124	uint m_alloc_mnr[2]; /* min alloc btree records */
	125	uint m_bmap_dmxr[2]; /* max bmap btree records */
	126	uint m_bmap_dmnr[2]; /* min bmap btree records */
035e00ac DW	127	uint m_rmap_mxr[2]; /* max rmap btree records */
035e00ac DW	128	uint m_rmap_mnr[2]; /* min rmap btree records */
1946b91c DW	129	uint m_refc_mxr[2]; /* max refc btree records */
1946b91c DW	130	uint m_refc_mnr[2]; /* min refc btree records */
1da177e4 LT	131	uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
1da177e4 LT	132	uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
035e00ac	133	uint m_rmap_maxlevels; /* max rmap btree levels */
1946b91c	134	uint m_refc_maxlevels; /* max refcount btree level */
8018026e	135	xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
52548852 DW	136	uint m_alloc_set_aside; /* space we can't use */
52548852 DW	137	uint m_ag_max_usable; /* max space per AG */
b0dff466 DC	138	int m_dalign; /* stripe unit */
	139	int m_swidth; /* stripe width */
	140	xfs_agnumber_t m_maxagi; /* highest inode alloc group */
	141	uint m_allocsize_log;/* min write size log bytes */
	142	uint m_allocsize_blocks; /* min write size blocks */
	143	int m_logbufs; /* number of log buffers */
	144	int m_logbsize; /* size of each log buffer */
	145	uint m_rsumlevels; /* rt summary levels */
	146	uint m_rsumsize; /* size of rt summary, bytes */
1da177e4	147	int m_fixedfsid[2]; /* unchanged for life of FS */
1da177e4	148	uint m_qflags; /* quota status flags */
b0dff466 DC	149	uint64_t m_flags; /* global mount flags */
	150	int64_t m_low_space[XFS_LOWSP_MAX];
	151	struct xfs_ino_geometry m_ino_geo; /* inode geometry */
0eadd102	152	struct xfs_trans_resv m_resv; /* precomputed res values */
b0dff466	153	/* low free space thresholds */
ab23a776	154	unsigned long m_opstate; /* dynamic state flags */
b0dff466 DC	155	bool m_always_cow;
	156	bool m_fail_unmount;
	157	bool m_finobt_nores; /* no per-AG finobt resv. */
	158	bool m_update_sb; /* sb needs update in mount */
	159
	160	/*
	161	* Bitsets of per-fs metadata that have been checked and/or are sick.
	162	* Callers must hold m_sb_lock to access these two fields.
	163	*/
	164	uint8_t m_fs_checked;
	165	uint8_t m_fs_sick;
	166	/*
	167	* Bitsets of rt metadata that have been checked and/or are sick.
	168	* Callers must hold m_sb_lock to access this field.
	169	*/
	170	uint8_t m_rt_checked;
	171	uint8_t m_rt_sick;
	172
	173	/*
	174	* End of read-mostly variables. Frequently written variables and locks
	175	* should be placed below this comment from now on. The first variable
	176	* here is marked as cacheline aligned so they it is separated from
	177	* the read-mostly variables.
	178	*/
	179
	180	spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */
	181	struct percpu_counter m_icount; /* allocated inodes counter */
	182	struct percpu_counter m_ifree; /* free inodes counter */
	183	struct percpu_counter m_fdblocks; /* free block counter */
	184	/*
	185	* Count of data device blocks reserved for delayed allocations,
	186	* including indlen blocks. Does not include allocated CoW staging
	187	* extents or anything related to the rt device.
	188	*/
	189	struct percpu_counter m_delalloc_blks;
16eaab83 BF	190	/*
	191	* Global count of allocation btree blocks in use across all AGs. Only
	192	* used when perag reservation is enabled. Helps prevent block
	193	* reservation from attempting to reserve allocation btree blocks.
	194	*/
	195	atomic64_t m_allocbt_blks;
b0dff466 DC	196
	197	struct radix_tree_root m_perag_tree; /* per-ag accounting info */
	198	spinlock_t m_perag_lock; /* lock for m_perag_tree */
c8ce540d DW	199	uint64_t m_resblks; /* total reserved blocks */
	200	uint64_t m_resblks_avail;/* available reserved blocks */
	201	uint64_t m_resblks_save; /* reserved blks @ remount,ro */
a7b339f1	202	struct delayed_work m_reclaim_work; /* background inode reclaim */
a31b1d3d	203	struct xfs_kobj m_kobj;
192852be	204	struct xfs_kobj m_error_kobj;
ffd40ef6	205	struct xfs_kobj m_error_meta_kobj;
192852be	206	struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
225e4635	207	struct xstats m_stats; /* per-fs stats */
b0dff466 DC	208	xfs_agnumber_t m_agfrotor; /* last ag where space found */
	209	xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
	210	spinlock_t m_agirotor_lock;/* .. and lock protecting it */
aa6bf01d	211
f0f7a674 DW	212	/*
	213	* Workqueue item so that we can coalesce multiple inode flush attempts
	214	* into a single flush.
	215	*/
	216	struct work_struct m_flush_inodes_work;
52785112 CH	217
	218	/*
	219	* Generation of the filesysyem layout. This is incremented by each
	220	* growfs, and used by the pNFS server to ensure the client updates
	221	* its view of the block device once it gets a layout that might
	222	* reference the newly added blocks. Does not need to be persistent
	223	* as long as we only allow file system size increments, but if we
	224	* ever support shrinks it would have to be persisted in addition
	225	* to various other kinds of pain inflicted on the pNFS server.
	226	*/
c8ce540d	227	uint32_t m_generation;
b0dff466	228	struct mutex m_growlock; /* growfs mutex */
801cc4e1 BF	229
801cc4e1 BF	230	#ifdef DEBUG
31965ef3 DW	231	/*
	232	* Frequency with which errors are injected. Replaces xfs_etest; the
	233	* value stored in here is the inverse of the frequency with which the
	234	* error triggers. 1 = always, 2 = half the time, etc.
	235	*/
	236	unsigned int *m_errortag;
c6840101	237	struct xfs_kobj m_errortag_kobj;
801cc4e1	238	#endif
1da177e4 LT	239	} xfs_mount_t;
1da177e4 LT	240
ef325959 DW	241	#define M_IGEO(mp) (&(mp)->m_ino_geo)
ef325959 DW	242
1da177e4 LT	243	/*
	244	* Flags for m_flags.
	245	*/
92821e2b	246	#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
1da177e4 LT	247	must be synchronous except
1da177e4 LT	248	for space allocations */
e6b3bb78	249	#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */
92821e2b	250	#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
e718eeb4	251	#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
1da177e4 LT	252	operations, typically for
1da177e4 LT	253	disk errors in metadata */
e84661aa	254	#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
e718eeb4	255	#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
1da177e4	256	allocations */
13059ff0	257	#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
bd186aa9	258	#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
e718eeb4	259	#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
3274d008	260	#define XFS_MOUNT_ALLOCSIZE (1ULL << 12) /* specified allocation size */
12c3f05c ES	261	#define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */
12c3f05c ES	262	#define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */
e718eeb4	263	#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
1bd960ee	264	#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
e718eeb4	265	#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
1da177e4	266	* allocation */
bd186aa9	267	#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
e718eeb4	268	#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
7c6b94b1	269	#define XFS_MOUNT_LARGEIO (1ULL << 22) /* report large preferred
e8c8b3a7	270	* I/O size in stat() */
2a82b8be DC	271	#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
2a82b8be DC	272	allocator */
7c12f296	273	#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
606723d9	274	#define XFS_MOUNT_DAX_ALWAYS (1ULL << 26)
8d6c3446	275	#define XFS_MOUNT_DAX_NEVER (1ULL << 27)
cbe4dab1	276
ab23a776 DC	277	/*
	278	* If set, inactivation worker threads will be scheduled to process queued
	279	* inodegc work. If not, queued inodes remain in memory waiting to be
	280	* processed.
	281	*/
	282	#define XFS_OPSTATE_INODEGC_ENABLED 0
	283
	284	#define __XFS_IS_OPSTATE(name, NAME) \
	285	static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
	286	{ \
	287	return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
	288	} \
	289	static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
	290	{ \
	291	return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
	292	} \
	293	static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
	294	{ \
	295	return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
	296	}
	297
	298	__XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)
	299
	300	#define XFS_OPSTATE_STRINGS \
	301	{ (1UL << XFS_OPSTATE_INODEGC_ENABLED), "inodegc" }
	302
1da177e4	303	/*
1f443ad7 NS	304	* Max and min values for mount-option defined I/O
1f443ad7 NS	305	* preallocation sizes.
1da177e4	306	*/
1f443ad7	307	#define XFS_MAX_IO_LOG 30 /* 1G */
1da177e4 LT	308	#define XFS_MIN_IO_LOG PAGE_SHIFT
1da177e4 LT	309
92821e2b DC	310	#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
92821e2b DC	311	((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
1da177e4	312	#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
745f6919 CH	313	void xfs_do_force_shutdown(struct xfs_mount mp, int flags, char fname,
745f6919 CH	314	int lnnum);
1da177e4	315	#define xfs_force_shutdown(m,f) \
745f6919	316	xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
1da177e4	317
2b5decd0 CH	318	#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
	319	#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
	320	#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
	321	#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
2b5decd0	322
1da177e4 LT	323	/*
	324	* Flags for xfs_mountfs
	325	*/
764d1f89	326	#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
1da177e4	327
a844f451 NS	328	static inline xfs_agnumber_t
a844f451 NS	329	xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
1da177e4	330	{
4f1adf33	331	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
a844f451 NS	332	do_div(ld, mp->m_sb.sb_agblocks);
a844f451 NS	333	return (xfs_agnumber_t) ld;
1da177e4 LT	334	}
1da177e4 LT	335
a844f451 NS	336	static inline xfs_agblock_t
a844f451 NS	337	xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
1da177e4	338	{
4f1adf33	339	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
a844f451	340	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
1da177e4 LT	341	}
1da177e4 LT	342
07b6403a DC	343	int xfs_buf_hash_init(struct xfs_perag *pag);
07b6403a DC	344	void xfs_buf_hash_destroy(struct xfs_perag *pag);
6031e73a	345
af3b6382	346	extern void xfs_uuid_table_free(void);
c8ce540d	347	extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
4249023a	348	extern int xfs_mountfs(xfs_mount_t *mp);
41b5c2e7	349	extern void xfs_unmountfs(xfs_mount_t *);
964aa8d9	350
7d6f07d2 DW	351	/*
	352	* Deltas for the block count can vary from 1 to very large, but lock contention
	353	* only occurs on frequent small block count updates such as in the delayed
	354	* allocation path for buffered writes (page a time updates). Hence we set
	355	* a large batch count (1024) to minimise global counter updates except when
	356	* we get near to ENOSPC and we have to be very accurate with our updates.
	357	*/
	358	#define XFS_FDBLOCKS_BATCH 1024
	359
0d485ada DC	360	extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
0d485ada DC	361	bool reserved);
bab98bbe DC	362	extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
bab98bbe DC	363
764d1f89	364	extern int xfs_readsb(xfs_mount_t *, int);
1da177e4	365	extern void xfs_freesb(xfs_mount_t *);
91ee575f	366	extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
c8ce540d	367	extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
1da177e4	368
d7658d48 CH	369	extern int xfs_dev_is_read_only(struct xfs_mount , char );
d7658d48 CH	370
055388a3 DC	371	extern void xfs_set_low_space_thresholds(struct xfs_mount *);
055388a3 DC	372
3fbbbea3 DC	373	int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
	374	xfs_off_t count_fsb);
	375
df309390 CM	376	struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
df309390 CM	377	int error_class, int error);
f467cad9	378	void xfs_force_summary_recalc(struct xfs_mount *mp);
9fe82b8c	379	void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
df309390	380
1da177e4	381	#endif /* __XFS_MOUNT_H__ */