fs/xfs/xfs_mount.h

1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
44 #define XFS_ERR_RETRY_FOREVER	-1
47  * Although retry_timeout is in jiffies which is normally an unsigned long,
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.
55 	long		retry_timeout;	/* in jiffies, -1 = infinite */
59  * The struct xfsmount layout is optimised to separate read-mostly variables
60  * from variables that are frequently modified. We put the read-mostly variables
63  * Typically, read-mostly variables are those that are set at mount time and
78 	struct xfs_inode	*m_rsumip;	/* pointer to summary inode */
85 	 * Optional cache of rt summary level per bitmap block with the
91 	struct xfs_mru_cache	*m_filestream;  /* per-mount filestream data */
101 	uint8_t			m_blkbb_log;	/* blocklog - BBSHIFT */
103 	uint8_t			m_sectbb_log;	/* sectlog - BBSHIFT */
104 	uint			m_blockmask;	/* sb_blocksize-1 */
106 	uint			m_blockwmask;	/* blockwsize-1 */
129 	uint			m_rsumlevels;	/* rt summary levels */
130 	uint			m_rsumsize;	/* size of rt summary, bytes */
140 	bool			m_finobt_nores; /* no per-AG finobt resv. */
144 	 * Bitsets of per-fs metadata that have been checked and/or are sick.
157 	 * End of read-mostly variables. Frequently written variables and locks
160 	 * the read-mostly variables.
174 	struct radix_tree_root	m_perag_tree;	/* per-ag accounting info */
188 	struct xstats		m_stats;	/* per-fs stats */
204 	 * as long as we only allow file system size increments, but if we
222 #define M_IGEO(mp)		(&(mp)->m_ino_geo)
227 #define XFS_MOUNT_WSYNC		(1ULL << 0)	/* for nfs - all metadata ops
239 #define XFS_MOUNT_GRPID		(1ULL << 9)	/* group-ID assigned from directory */
240 #define XFS_MOUNT_NORECOVERY	(1ULL << 10)	/* no recovery - dirty fs */
248 #define XFS_MOUNT_RDONLY	(1ULL << 20)	/* read-only fs */
259  * Max and min values for mount-option defined I/O
266 				((mp)->m_flags & XFS_MOUNT_WAS_CLEAN)
267 #define XFS_FORCED_SHUTDOWN(mp)	((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)
276 #define SHUTDOWN_CORRUPT_INCORE	0x0008	/* corrupt in-memory data structures */
287 	do_div(ld, mp->m_sb.sb_agblocks);  in xfs_daddr_to_agno()
295 	return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);  in xfs_daddr_to_agbno()
298 /* per-AG block reservation data structures*/
309  * Per-ag incore structure, copies of information in agf and agi, to improve the
340 	 * Bitsets of per-ag metadata that have been checked and/or are sick.
357 	unsigned long	pag_ici_reclaim_cursor;	/* reclaim restart point */
363 	/* for rcu-safe freeing */
390 		return &pag->pag_meta_resv;  in xfs_perag_resv()
392 		return &pag->pag_rmapbt_resv;  in xfs_perag_resv()
414 	return mp->m_alloc_set_aside;  in xfs_fdblocks_unavailable()