fs/xfs/xfs_mount.h

1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
45 #define XFS_ERR_RETRY_FOREVER	-1
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.
56 	long		retry_timeout;	/* in jiffies, -1 = infinite */
60  * Per-cpu deferred inode inactivation GC lists.
75  * The struct xfsmount layout is optimised to separate read-mostly variables
76  * from variables that are frequently modified. We put the read-mostly variables
79  * Typically, read-mostly variables are those that are set at mount time and
109 	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
119 	uint8_t			m_blkbb_log;	/* blocklog - BBSHIFT */
121 	uint8_t			m_sectbb_log;	/* sectlog - BBSHIFT */
123 	uint			m_blockmask;	/* sb_blocksize-1 */
125 	uint			m_blockwmask;	/* blockwsize-1 */
160 	unsigned long		m_opstate;	/* dynamic state flags */
163 	bool			m_finobt_nores; /* no per-AG finobt resv. */
167 	 * Bitsets of per-fs metadata that have been checked and/or are sick.
180 	 * End of read-mostly variables. Frequently written variables and locks
183 	 * the read-mostly variables.
205 	struct radix_tree_root	m_perag_tree;	/* per-ag accounting info */
216 	struct xstats		m_stats;	/* per-fs stats */
257 #define M_IGEO(mp)		(&(mp)->m_ino_geo)
273 #define XFS_FEAT_ASCIICI	(1ULL << 8)	/* ASCII only case-insens. */
280 #define XFS_FEAT_PQUOTINO	(1ULL << 15)	/* non-shared proj/grp quotas */
302 #define XFS_FEAT_GRPID		(1ULL << 55)	/* group-ID assigned from directory */
309 #define XFS_FEAT_NORECOVERY	(1ULL << 62)	/* no recovery - dirty fs */
315 	return mp->m_features & XFS_FEAT_ ## NAME; \
323 	mp->m_features |= XFS_FEAT_ ## NAME; \
324 	xfs_sb_version_add ## name(&mp->m_sb); \
359  * These do not change dynamically - features that can come and go, such as 32  in __XFS_ADD_FEAT()
360  * bit inodes and read-only state, are kept as operational state rather than  in __XFS_ADD_FEAT()
381  * Operational mount state flags  in __XFS_ADD_FEAT()
389 #define XFS_OPSTATE_READONLY		4	/* read-only fs */  in __XFS_ADD_FEAT()
399  * to process queued blockgc work.  If not, inodes retain their preallocations  in __XFS_ADD_FEAT()
416 	return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \  in __XFS_ADD_FEAT()
420 	return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
424 	return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
429 __XFS_IS_OPSTATE(shutdown, SHUTDOWN)
443 	return !test_and_set_bit(nr, &mp->m_opstate);
449 	{ (1UL << XFS_OPSTATE_SHUTDOWN),		"shutdown" }, \
460  * Max and min values for mount-option defined I/O
473 #define SHUTDOWN_FORCE_UMOUNT	(1u << 2) /* shutdown from a forced unmount */
474 #define SHUTDOWN_CORRUPT_INCORE	(1u << 3) /* corrupt in-memory structures */
494 	do_div(ld, mp->m_sb.sb_agblocks);  in xfs_daddr_to_agno()
502 	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);  in xfs_daddr_to_agbno()
526  * - The minimum number of blocks needed to support splitting a bmap btree
527  * - The blocks currently in use by the freespace btrees because they record
528  *   the actual blocks that will fill per-AG metadata space reservations
534 	return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks);  in xfs_fdblocks_unavailable()
543 	return xfs_mod_freecounter(mp, &mp->m_fdblocks, delta, reserved);  in xfs_mod_fdblocks()
549 	return xfs_mod_freecounter(mp, &mp->m_frextents, delta, false);  in xfs_mod_frextents()