[thirdparty/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;

/* 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 */
};

typedef struct xfs_mount {
	struct super_block	*m_super;

	/*
	 * 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;

	struct xfs_ail		*m_ail;		/* fs active log item list */

	struct xfs_sb		m_sb;		/* copy of fs superblock */
	spinlock_t		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;

	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
	char			*m_rtname;	/* realtime device name */
	char			*m_logname;	/* external log device name */
	int			m_bsize;	/* fs logical block size */
	xfs_agnumber_t		m_agfrotor;	/* last ag where space found */
	xfs_agnumber_t		m_agirotor;	/* last ag dir inode alloced */
	spinlock_t		m_agirotor_lock;/* .. and lock protecting it */
	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 */
	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_ino_geometry	m_ino_geo;	/* inode geometry */
	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 */
	/*
	 * 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_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 */
	uint8_t			m_blkbit_log;	/* blocklog + NBBY */
	uint8_t			m_blkbb_log;	/* blocklog - BBSHIFT */
	uint8_t			m_agno_log;	/* log #ag's */
	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 */
	struct radix_tree_root	m_perag_tree;	/* per-ag accounting info */
	spinlock_t		m_perag_lock;	/* lock for m_perag_tree */
	struct mutex		m_growlock;	/* growfs mutex */
	int			m_fixedfsid[2];	/* unchanged for life of FS */
	uint64_t		m_flags;	/* global mount flags */
	bool			m_finobt_nores; /* no per-AG finobt resv. */
	uint			m_qflags;	/* quota status flags */
	struct xfs_trans_resv	m_resv;		/* precomputed res values */
	uint64_t		m_resblks;	/* total reserved blocks */
	uint64_t		m_resblks_avail;/* available reserved blocks */
	uint64_t		m_resblks_save;	/* reserved blks @ remount,ro */
	int			m_dalign;	/* stripe unit */
	int			m_swidth;	/* stripe width */
	uint8_t			m_sectbb_log;	/* sectlog - BBSHIFT */
	atomic_t		m_active_trans;	/* number trans frozen */
	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
	struct delayed_work	m_reclaim_work;	/* background inode reclaim */
	struct delayed_work	m_eofblocks_work; /* background eof blocks
						     trimming */
	struct delayed_work	m_cowblocks_work; /* background cow blocks
						     trimming */
	bool			m_update_sb;	/* sb needs update in mount */
	int64_t			m_low_space[XFS_LOWSP_MAX];
						/* low free space thresholds */
	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 */

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

	/*
	 * 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;

	bool			m_always_cow;
	bool			m_fail_unmount;
#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		(1ULL << 62)	/* TEST ONLY! */

/*
 * 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 */
#define SHUTDOWN_REMOTE_REQ	0x0010	/* shutdown came from remote cell */
#define SHUTDOWN_DEVICE_REQ	0x0020	/* failed all paths to the device */

/*
 * 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);
}

/* per-AG block reservation data structures*/
struct xfs_ag_resv {
	/* number of blocks originally reserved here */
	xfs_extlen_t			ar_orig_reserved;
	/* number of blocks reserved here */
	xfs_extlen_t			ar_reserved;
	/* number of blocks originally asked for */
	xfs_extlen_t			ar_asked;
};

/*
 * Per-ag incore structure, copies of information in agf and agi, to improve the
 * performance of allocation group selection.
 */
typedef struct xfs_perag {
	struct xfs_mount *pag_mount;	/* owner filesystem */
	xfs_agnumber_t	pag_agno;	/* AG this structure belongs to */
	atomic_t	pag_ref;	/* perag reference count */
	char		pagf_init;	/* this agf's entry is initialized */
	char		pagi_init;	/* this agi's entry is initialized */
	char		pagf_metadata;	/* the agf is preferred to be metadata */
	char		pagi_inodeok;	/* The agi is ok for inodes */
	uint8_t		pagf_levels[XFS_BTNUM_AGF];
					/* # of levels in bno & cnt btree */
	bool		pagf_agflreset; /* agfl requires reset before use */
	uint32_t	pagf_flcount;	/* count of blocks in freelist */
	xfs_extlen_t	pagf_freeblks;	/* total free blocks */
	xfs_extlen_t	pagf_longest;	/* longest free space */
	uint32_t	pagf_btreeblks;	/* # of blocks held in AGF btrees */
	xfs_agino_t	pagi_freecount;	/* number of free inodes */
	xfs_agino_t	pagi_count;	/* number of allocated inodes */

	/*
	 * Inode allocation search lookup optimisation.
	 * If the pagino matches, the search for new inodes
	 * doesn't need to search the near ones again straight away
	 */
	xfs_agino_t	pagl_pagino;
	xfs_agino_t	pagl_leftrec;
	xfs_agino_t	pagl_rightrec;

	/*
	 * Bitsets of per-ag metadata that have been checked and/or are sick.
	 * Callers should hold pag_state_lock before accessing this field.
	 */
	uint16_t	pag_checked;
	uint16_t	pag_sick;
	spinlock_t	pag_state_lock;

	spinlock_t	pagb_lock;	/* lock for pagb_tree */
	struct rb_root	pagb_tree;	/* ordered tree of busy extents */
	unsigned int	pagb_gen;	/* generation count for pagb_tree */
	wait_queue_head_t pagb_wait;	/* woken when pagb_gen changes */

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

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

	/* buffer cache index */
	spinlock_t	pag_buf_lock;	/* lock for pag_buf_hash */
	struct rhashtable pag_buf_hash;

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

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

	/* reference count */
	uint8_t			pagf_refcount_level;

	/*
	 * Unlinked inode information.  This incore information reflects
	 * data stored in the AGI, so callers must hold the AGI buffer lock
	 * or have some other means to control concurrency.
	 */
	struct rhashtable	pagi_unlinked_hash;
} xfs_perag_t;

static inline struct xfs_ag_resv *
xfs_perag_resv(
	struct xfs_perag	*pag,
	enum xfs_ag_resv_type	type)
{
	switch (type) {
	case XFS_AG_RESV_METADATA:
		return &pag->pag_meta_resv;
	case XFS_AG_RESV_RMAPBT:
		return &pag->pag_rmapbt_resv;
	default:
		return NULL;
	}
}

int xfs_buf_hash_init(xfs_perag_t *pag);
void xfs_buf_hash_destroy(xfs_perag_t *pag);

extern void	xfs_uuid_table_free(void);
extern int	xfs_log_sbcount(xfs_mount_t *);
extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
extern int	xfs_mountfs(xfs_mount_t *mp);
extern int	xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
				     xfs_agnumber_t *maxagi);
extern void	xfs_unmountfs(xfs_mount_t *);

extern int	xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
extern int	xfs_mod_ifree(struct xfs_mount *mp, int64_t delta);
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 struct xfs_buf *xfs_getsb(xfs_mount_t *);
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;
7d095257	15
055388a3 DC	16	/* dynamic preallocation free space thresholds, 5% down to 1% */
	17	enum {
	18	XFS_LOWSP_1_PCNT = 0,
	19	XFS_LOWSP_2_PCNT,
	20	XFS_LOWSP_3_PCNT,
	21	XFS_LOWSP_4_PCNT,
	22	XFS_LOWSP_5_PCNT,
	23	XFS_LOWSP_MAX,
	24	};
	25
192852be CM	26	/*
	27	* Error Configuration
	28	*
	29	* Error classes define the subsystem the configuration belongs to.
	30	* Error numbers define the errors that are configurable.
	31	*/
	32	enum {
ffd40ef6	33	XFS_ERR_METADATA,
192852be CM	34	XFS_ERR_CLASS_MAX,
	35	};
	36	enum {
ffd40ef6	37	XFS_ERR_DEFAULT,
e0a431b3 CM	38	XFS_ERR_EIO,
	39	XFS_ERR_ENOSPC,
	40	XFS_ERR_ENODEV,
192852be CM	41	XFS_ERR_ERRNO_MAX,
	42	};
	43
a5ea70d2 CM	44	#define XFS_ERR_RETRY_FOREVER -1
a5ea70d2 CM	45
77169812 ES	46	/*
	47	* Although retry_timeout is in jiffies which is normally an unsigned long,
	48	* we limit the retry timeout to 86400 seconds, or one day. So even a
	49	* signed 32-bit long is sufficient for a HZ value up to 24855. Making it
	50	* signed lets us store the special "-1" value, meaning retry forever.
	51	*/
192852be CM	52	struct xfs_error_cfg {
	53	struct xfs_kobj kobj;
	54	int max_retries;
77169812	55	long retry_timeout; /* in jiffies, -1 = infinite */
192852be CM	56	};
192852be CM	57
1da177e4	58	typedef struct xfs_mount {
b267ce99	59	struct super_block *m_super;
6772c1f1 DW	60
	61	/*
	62	* Bitsets of per-fs metadata that have been checked and/or are sick.
	63	* Callers must hold m_sb_lock to access these two fields.
	64	*/
	65	uint8_t m_fs_checked;
	66	uint8_t m_fs_sick;
	67	/*
	68	* Bitsets of rt metadata that have been checked and/or are sick.
	69	* Callers must hold m_sb_lock to access this field.
	70	*/
	71	uint8_t m_rt_checked;
	72	uint8_t m_rt_sick;
	73
82fa9012	74	struct xfs_ail m_ail; / fs active log item list */
501ab323 DC	75
501ab323 DC	76	struct xfs_sb m_sb; /* copy of fs superblock */
3685c2a1	77	spinlock_t m_sb_lock; /* sb counter lock */
501ab323	78	struct percpu_counter m_icount; /* allocated inodes counter */
e88b64ea	79	struct percpu_counter m_ifree; /* free inodes counter */
0d485ada	80	struct percpu_counter m_fdblocks; /* free block counter */
9fe82b8c DW	81	/*
	82	* Count of data device blocks reserved for delayed allocations,
	83	* including indlen blocks. Does not include allocated CoW staging
	84	* extents or anything related to the rt device.
	85	*/
	86	struct percpu_counter m_delalloc_blks;
501ab323	87
1da177e4	88	struct xfs_buf m_sb_bp; / buffer for superblock */
fc1f8c1c NS	89	char m_rtname; / realtime device name */
fc1f8c1c NS	90	char m_logname; / external log device name */
1da177e4 LT	91	int m_bsize; /* fs logical block size */
	92	xfs_agnumber_t m_agfrotor; /* last ag where space found */
	93	xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */
36e41eeb	94	spinlock_t m_agirotor_lock;/* .. and lock protecting it */
1da177e4	95	xfs_agnumber_t m_maxagi; /* highest inode alloc group */
5da8a07c CH	96	uint m_allocsize_log;/* min write size log bytes */
5da8a07c CH	97	uint m_allocsize_blocks; /* min write size blocks */
0650b554 DC	98	struct xfs_da_geometry m_dir_geo; / directory block geometry */
0650b554 DC	99	struct xfs_da_geometry m_attr_geo; / attribute block geometry */
ad223e60	100	struct xlog m_log; / log specific stuff */
ef325959	101	struct xfs_ino_geometry m_ino_geo; /* inode geometry */
1da177e4 LT	102	int m_logbufs; /* number of log buffers */
	103	int m_logbsize; /* size of each log buffer */
	104	uint m_rsumlevels; /* rt summary levels */
	105	uint m_rsumsize; /* size of rt summary, bytes */
355e3532 OS	106	/*
	107	* Optional cache of rt summary level per bitmap block with the
	108	* invariant that m_rsum_cache[bbno] <= the minimum i for which
	109	* rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
	110	* inode lock.
	111	*/
	112	uint8_t *m_rsum_cache;
1da177e4 LT	113	struct xfs_inode m_rbmip; / pointer to bitmap inode */
	114	struct xfs_inode m_rsumip; / pointer to summary inode */
	115	struct xfs_inode m_rootip; / pointer to root directory */
	116	struct xfs_quotainfo m_quotainfo; / disk quota information */
	117	xfs_buftarg_t m_ddev_targp; / saves taking the address */
	118	xfs_buftarg_t m_logdev_targp;/ ptr to log device */
	119	xfs_buftarg_t m_rtdev_targp; / ptr to rt device */
c8ce540d DW	120	uint8_t m_blkbit_log; /* blocklog + NBBY */
	121	uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
	122	uint8_t m_agno_log; /* log #ag's */
1da177e4 LT	123	uint m_blockmask; /* sb_blocksize-1 */
	124	uint m_blockwsize; /* sb_blocksize in words */
	125	uint m_blockwmask; /* blockwsize-1 */
60197e8d CH	126	uint m_alloc_mxr[2]; /* max alloc btree records */
	127	uint m_alloc_mnr[2]; /* min alloc btree records */
	128	uint m_bmap_dmxr[2]; /* max bmap btree records */
	129	uint m_bmap_dmnr[2]; /* min bmap btree records */
035e00ac DW	130	uint m_rmap_mxr[2]; /* max rmap btree records */
035e00ac DW	131	uint m_rmap_mnr[2]; /* min rmap btree records */
1946b91c DW	132	uint m_refc_mxr[2]; /* max refc btree records */
1946b91c DW	133	uint m_refc_mnr[2]; /* min refc btree records */
1da177e4 LT	134	uint m_ag_maxlevels; /* XFS_AG_MAXLEVELS */
1da177e4 LT	135	uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
035e00ac	136	uint m_rmap_maxlevels; /* max rmap btree levels */
1946b91c	137	uint m_refc_maxlevels; /* max refcount btree level */
8018026e	138	xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
52548852 DW	139	uint m_alloc_set_aside; /* space we can't use */
52548852 DW	140	uint m_ag_max_usable; /* max space per AG */
1c1c6ebc DC	141	struct radix_tree_root m_perag_tree; /* per-ag accounting info */
1c1c6ebc DC	142	spinlock_t m_perag_lock; /* lock for m_perag_tree */
cc92e7ac	143	struct mutex m_growlock; /* growfs mutex */
1da177e4	144	int m_fixedfsid[2]; /* unchanged for life of FS */
c8ce540d	145	uint64_t m_flags; /* global mount flags */
e1f6ca11	146	bool m_finobt_nores; /* no per-AG finobt resv. */
1da177e4	147	uint m_qflags; /* quota status flags */
0eadd102	148	struct xfs_trans_resv m_resv; /* precomputed res values */
c8ce540d DW	149	uint64_t m_resblks; /* total reserved blocks */
	150	uint64_t m_resblks_avail;/* available reserved blocks */
	151	uint64_t m_resblks_save; /* reserved blks @ remount,ro */
1da177e4 LT	152	int m_dalign; /* stripe unit */
1da177e4 LT	153	int m_swidth; /* stripe width */
c8ce540d	154	uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
1da177e4	155	atomic_t m_active_trans; /* number trans frozen */
2a82b8be	156	struct xfs_mru_cache m_filestream; / per-mount filestream data */
a7b339f1	157	struct delayed_work m_reclaim_work; /* background inode reclaim */
579b62fa BF	158	struct delayed_work m_eofblocks_work; /* background eof blocks
579b62fa BF	159	trimming */
83104d44 DW	160	struct delayed_work m_cowblocks_work; /* background cow blocks
83104d44 DW	161	trimming */
61e63ecb	162	bool m_update_sb; /* sb needs update in mount */
055388a3 DC	163	int64_t m_low_space[XFS_LOWSP_MAX];
055388a3 DC	164	/* low free space thresholds */
a31b1d3d	165	struct xfs_kobj m_kobj;
192852be	166	struct xfs_kobj m_error_kobj;
ffd40ef6	167	struct xfs_kobj m_error_meta_kobj;
192852be	168	struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
225e4635	169	struct xstats m_stats; /* per-fs stats */
aa6bf01d	170
f0f7a674 DW	171	/*
	172	* Workqueue item so that we can coalesce multiple inode flush attempts
	173	* into a single flush.
	174	*/
	175	struct work_struct m_flush_inodes_work;
78c931b8	176	struct workqueue_struct *m_buf_workqueue;
aa6bf01d	177	struct workqueue_struct *m_unwritten_workqueue;
4c2d542f	178	struct workqueue_struct *m_cil_workqueue;
5889608d	179	struct workqueue_struct *m_reclaim_workqueue;
579b62fa	180	struct workqueue_struct *m_eofblocks_workqueue;
696a5620	181	struct workqueue_struct *m_sync_workqueue;
52785112 CH	182
	183	/*
	184	* Generation of the filesysyem layout. This is incremented by each
	185	* growfs, and used by the pNFS server to ensure the client updates
	186	* its view of the block device once it gets a layout that might
	187	* reference the newly added blocks. Does not need to be persistent
	188	* as long as we only allow file system size increments, but if we
	189	* ever support shrinks it would have to be persisted in addition
	190	* to various other kinds of pain inflicted on the pNFS server.
	191	*/
c8ce540d	192	uint32_t m_generation;
801cc4e1	193
66ae56a5	194	bool m_always_cow;
e6b3bb78	195	bool m_fail_unmount;
801cc4e1	196	#ifdef DEBUG
31965ef3 DW	197	/*
	198	* Frequency with which errors are injected. Replaces xfs_etest; the
	199	* value stored in here is the inverse of the frequency with which the
	200	* error triggers. 1 = always, 2 = half the time, etc.
	201	*/
	202	unsigned int *m_errortag;
c6840101	203	struct xfs_kobj m_errortag_kobj;
801cc4e1	204	#endif
1da177e4 LT	205	} xfs_mount_t;
1da177e4 LT	206
ef325959 DW	207	#define M_IGEO(mp) (&(mp)->m_ino_geo)
ef325959 DW	208
1da177e4 LT	209	/*
	210	* Flags for m_flags.
	211	*/
92821e2b	212	#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops
1da177e4 LT	213	must be synchronous except
1da177e4 LT	214	for space allocations */
e6b3bb78	215	#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */
92821e2b	216	#define XFS_MOUNT_WAS_CLEAN (1ULL << 3)
e718eeb4	217	#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
1da177e4 LT	218	operations, typically for
1da177e4 LT	219	disk errors in metadata */
e84661aa	220	#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
e718eeb4	221	#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment
1da177e4	222	allocations */
13059ff0	223	#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */
bd186aa9	224	#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */
e718eeb4	225	#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */
3274d008	226	#define XFS_MOUNT_ALLOCSIZE (1ULL << 12) /* specified allocation size */
12c3f05c ES	227	#define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */
12c3f05c ES	228	#define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */
e718eeb4	229	#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */
1bd960ee	230	#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/
e718eeb4	231	#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width
1da177e4	232	* allocation */
bd186aa9	233	#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */
e718eeb4	234	#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */
7c6b94b1	235	#define XFS_MOUNT_LARGEIO (1ULL << 22) /* report large preferred
e8c8b3a7	236	* I/O size in stat() */
2a82b8be DC	237	#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams
2a82b8be DC	238	allocator */
7c12f296	239	#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */
e8c8b3a7	240
cbe4dab1 DC	241	#define XFS_MOUNT_DAX (1ULL << 62) /* TEST ONLY! */
cbe4dab1 DC	242
1da177e4	243	/*
1f443ad7 NS	244	* Max and min values for mount-option defined I/O
1f443ad7 NS	245	* preallocation sizes.
1da177e4	246	*/
1f443ad7	247	#define XFS_MAX_IO_LOG 30 /* 1G */
1da177e4 LT	248	#define XFS_MIN_IO_LOG PAGE_SHIFT
1da177e4 LT	249
92821e2b DC	250	#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \
92821e2b DC	251	((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
1da177e4	252	#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
745f6919 CH	253	void xfs_do_force_shutdown(struct xfs_mount mp, int flags, char fname,
745f6919 CH	254	int lnnum);
1da177e4	255	#define xfs_force_shutdown(m,f) \
745f6919	256	xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
1da177e4	257
2b5decd0 CH	258	#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
	259	#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
	260	#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
	261	#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
	262	#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
	263	#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
	264
1da177e4 LT	265	/*
	266	* Flags for xfs_mountfs
	267	*/
764d1f89	268	#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */
1da177e4	269
a844f451 NS	270	static inline xfs_agnumber_t
a844f451 NS	271	xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d)
1da177e4	272	{
4f1adf33	273	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
a844f451 NS	274	do_div(ld, mp->m_sb.sb_agblocks);
a844f451 NS	275	return (xfs_agnumber_t) ld;
1da177e4 LT	276	}
1da177e4 LT	277
a844f451 NS	278	static inline xfs_agblock_t
a844f451 NS	279	xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
1da177e4	280	{
4f1adf33	281	xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d);
a844f451	282	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
1da177e4 LT	283	}
1da177e4 LT	284
3fd129b6	285	/* per-AG block reservation data structures*/
3fd129b6 DW	286	struct xfs_ag_resv {
	287	/* number of blocks originally reserved here */
	288	xfs_extlen_t ar_orig_reserved;
	289	/* number of blocks reserved here */
	290	xfs_extlen_t ar_reserved;
	291	/* number of blocks originally asked for */
	292	xfs_extlen_t ar_asked;
	293	};
	294
9356fe22 DC	295	/*
9356fe22 DC	296	* Per-ag incore structure, copies of information in agf and agi, to improve the
4fb6e8ad	297	* performance of allocation group selection.
9356fe22 DC	298	*/
	299	typedef struct xfs_perag {
	300	struct xfs_mount pag_mount; / owner filesystem */
	301	xfs_agnumber_t pag_agno; /* AG this structure belongs to */
	302	atomic_t pag_ref; /* perag reference count */
	303	char pagf_init; /* this agf's entry is initialized */
	304	char pagi_init; /* this agi's entry is initialized */
	305	char pagf_metadata; /* the agf is preferred to be metadata */
	306	char pagi_inodeok; /* The agi is ok for inodes */
c8ce540d	307	uint8_t pagf_levels[XFS_BTNUM_AGF];
9356fe22	308	/* # of levels in bno & cnt btree */
a27ba260	309	bool pagf_agflreset; /* agfl requires reset before use */
c8ce540d	310	uint32_t pagf_flcount; /* count of blocks in freelist */
9356fe22 DC	311	xfs_extlen_t pagf_freeblks; /* total free blocks */
9356fe22 DC	312	xfs_extlen_t pagf_longest; /* longest free space */
c8ce540d	313	uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
9356fe22 DC	314	xfs_agino_t pagi_freecount; /* number of free inodes */
	315	xfs_agino_t pagi_count; /* number of allocated inodes */
	316
	317	/*
	318	* Inode allocation search lookup optimisation.
	319	* If the pagino matches, the search for new inodes
	320	* doesn't need to search the near ones again straight away
	321	*/
	322	xfs_agino_t pagl_pagino;
	323	xfs_agino_t pagl_leftrec;
	324	xfs_agino_t pagl_rightrec;
6772c1f1 DW	325
	326	/*
	327	* Bitsets of per-ag metadata that have been checked and/or are sick.
	328	* Callers should hold pag_state_lock before accessing this field.
	329	*/
	330	uint16_t pag_checked;
	331	uint16_t pag_sick;
	332	spinlock_t pag_state_lock;
	333
9356fe22 DC	334	spinlock_t pagb_lock; /* lock for pagb_tree */
9356fe22 DC	335	struct rb_root pagb_tree; /* ordered tree of busy extents */
ebf55872 CH	336	unsigned int pagb_gen; /* generation count for pagb_tree */
ebf55872 CH	337	wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */
9356fe22 DC	338
	339	atomic_t pagf_fstrms; /* # of filestreams active in this AG */
	340
	341	spinlock_t pag_ici_lock; /* incore inode cache lock */
	342	struct radix_tree_root pag_ici_root; /* incore inode cache root */
	343	int pag_ici_reclaimable; /* reclaimable inodes */
	344	struct mutex pag_ici_reclaim_lock; /* serialisation point */
	345	unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
	346
	347	/* buffer cache index */
6031e73a LS	348	spinlock_t pag_buf_lock; /* lock for pag_buf_hash */
6031e73a LS	349	struct rhashtable pag_buf_hash;
9356fe22 DC	350
	351	/* for rcu-safe freeing */
	352	struct rcu_head rcu_head;
	353	int pagb_count; /* pagb slots in use */
3fd129b6 DW	354
	355	/* Blocks reserved for all kinds of metadata. */
	356	struct xfs_ag_resv pag_meta_resv;
21592863 BF	357	/* Blocks reserved for the reverse mapping btree. */
21592863 BF	358	struct xfs_ag_resv pag_rmapbt_resv;
46eeb521 DW	359
46eeb521 DW	360	/* reference count */
c8ce540d	361	uint8_t pagf_refcount_level;
9b247179 DW	362
	363	/*
	364	* Unlinked inode information. This incore information reflects
	365	* data stored in the AGI, so callers must hold the AGI buffer lock
	366	* or have some other means to control concurrency.
	367	*/
	368	struct rhashtable pagi_unlinked_hash;
9356fe22 DC	369	} xfs_perag_t;
9356fe22 DC	370
3fd129b6 DW	371	static inline struct xfs_ag_resv *
	372	xfs_perag_resv(
	373	struct xfs_perag *pag,
	374	enum xfs_ag_resv_type type)
	375	{
	376	switch (type) {
	377	case XFS_AG_RESV_METADATA:
	378	return &pag->pag_meta_resv;
21592863 BF	379	case XFS_AG_RESV_RMAPBT:
21592863 BF	380	return &pag->pag_rmapbt_resv;
3fd129b6 DW	381	default:
	382	return NULL;
	383	}
	384	}
	385
6031e73a LS	386	int xfs_buf_hash_init(xfs_perag_t *pag);
	387	void xfs_buf_hash_destroy(xfs_perag_t *pag);
	388
af3b6382	389	extern void xfs_uuid_table_free(void);
adab0f67	390	extern int xfs_log_sbcount(xfs_mount_t *);
c8ce540d	391	extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
4249023a	392	extern int xfs_mountfs(xfs_mount_t *mp);
ff55068c DC	393	extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
ff55068c DC	394	xfs_agnumber_t *maxagi);
41b5c2e7	395	extern void xfs_unmountfs(xfs_mount_t *);
964aa8d9	396
501ab323	397	extern int xfs_mod_icount(struct xfs_mount *mp, int64_t delta);
e88b64ea	398	extern int xfs_mod_ifree(struct xfs_mount *mp, int64_t delta);
0d485ada DC	399	extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
0d485ada DC	400	bool reserved);
bab98bbe DC	401	extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
bab98bbe DC	402
8c9ce2f7	403	extern struct xfs_buf xfs_getsb(xfs_mount_t );
764d1f89	404	extern int xfs_readsb(xfs_mount_t *, int);
1da177e4	405	extern void xfs_freesb(xfs_mount_t *);
91ee575f	406	extern bool xfs_fs_writable(struct xfs_mount *mp, int level);
c8ce540d	407	extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t);
1da177e4	408
d7658d48 CH	409	extern int xfs_dev_is_read_only(struct xfs_mount , char );
d7658d48 CH	410
055388a3 DC	411	extern void xfs_set_low_space_thresholds(struct xfs_mount *);
055388a3 DC	412
3fbbbea3 DC	413	int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
	414	xfs_off_t count_fsb);
	415
df309390 CM	416	struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
df309390 CM	417	int error_class, int error);
f467cad9	418	void xfs_force_summary_recalc(struct xfs_mount *mp);
9fe82b8c	419	void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
df309390	420
1da177e4	421	#endif /* __XFS_MOUNT_H__ */