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![Dave Chinner](/assets/img/avatar_default.png)
This is currently a spinlock lock protected rotor which can be implemented with a single atomic operation. Change it to be more efficient and get rid of the m_agirotor_lock. Noticed while converting the inode allocation AG selection loop to active perag references. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Allison Henderson <allison.henderson@oracle.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org>
550 lines
20 KiB
C
550 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_MOUNT_H__
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#define __XFS_MOUNT_H__
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struct xlog;
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struct xfs_inode;
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struct xfs_mru_cache;
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struct xfs_ail;
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struct xfs_quotainfo;
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struct xfs_da_geometry;
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struct xfs_perag;
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/* dynamic preallocation free space thresholds, 5% down to 1% */
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enum {
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XFS_LOWSP_1_PCNT = 0,
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XFS_LOWSP_2_PCNT,
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XFS_LOWSP_3_PCNT,
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XFS_LOWSP_4_PCNT,
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XFS_LOWSP_5_PCNT,
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XFS_LOWSP_MAX,
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};
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/*
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* Error Configuration
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*
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* Error classes define the subsystem the configuration belongs to.
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* Error numbers define the errors that are configurable.
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*/
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enum {
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XFS_ERR_METADATA,
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XFS_ERR_CLASS_MAX,
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};
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enum {
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XFS_ERR_DEFAULT,
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XFS_ERR_EIO,
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XFS_ERR_ENOSPC,
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XFS_ERR_ENODEV,
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XFS_ERR_ERRNO_MAX,
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};
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#define XFS_ERR_RETRY_FOREVER -1
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/*
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* Although retry_timeout is in jiffies which is normally an unsigned long,
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* we limit the retry timeout to 86400 seconds, or one day. So even a
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* signed 32-bit long is sufficient for a HZ value up to 24855. Making it
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* signed lets us store the special "-1" value, meaning retry forever.
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*/
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struct xfs_error_cfg {
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struct xfs_kobj kobj;
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int max_retries;
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long retry_timeout; /* in jiffies, -1 = infinite */
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};
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/*
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* Per-cpu deferred inode inactivation GC lists.
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*/
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struct xfs_inodegc {
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struct llist_head list;
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struct delayed_work work;
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/* approximate count of inodes in the list */
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unsigned int items;
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unsigned int shrinker_hits;
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};
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/*
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* The struct xfsmount layout is optimised to separate read-mostly variables
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* from variables that are frequently modified. We put the read-mostly variables
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* first, then place all the other variables at the end.
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*
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* Typically, read-mostly variables are those that are set at mount time and
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* never changed again, or only change rarely as a result of things like sysfs
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* knobs being tweaked.
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*/
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typedef struct xfs_mount {
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struct xfs_sb m_sb; /* copy of fs superblock */
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struct super_block *m_super;
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struct xfs_ail *m_ail; /* fs active log item list */
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struct xfs_buf *m_sb_bp; /* buffer for superblock */
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char *m_rtname; /* realtime device name */
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char *m_logname; /* external log device name */
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struct xfs_da_geometry *m_dir_geo; /* directory block geometry */
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struct xfs_da_geometry *m_attr_geo; /* attribute block geometry */
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struct xlog *m_log; /* log specific stuff */
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struct xfs_inode *m_rbmip; /* pointer to bitmap inode */
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struct xfs_inode *m_rsumip; /* pointer to summary inode */
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struct xfs_inode *m_rootip; /* pointer to root directory */
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struct xfs_quotainfo *m_quotainfo; /* disk quota information */
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xfs_buftarg_t *m_ddev_targp; /* saves taking the address */
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xfs_buftarg_t *m_logdev_targp;/* ptr to log device */
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xfs_buftarg_t *m_rtdev_targp; /* ptr to rt device */
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struct list_head m_mount_list; /* global mount list */
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void __percpu *m_inodegc; /* percpu inodegc structures */
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/*
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* Optional cache of rt summary level per bitmap block with the
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* invariant that m_rsum_cache[bbno] <= the minimum i for which
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* rsum[i][bbno] != 0. Reads and writes are serialized by the rsumip
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* inode lock.
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*/
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uint8_t *m_rsum_cache;
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struct xfs_mru_cache *m_filestream; /* per-mount filestream data */
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struct workqueue_struct *m_buf_workqueue;
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struct workqueue_struct *m_unwritten_workqueue;
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struct workqueue_struct *m_reclaim_workqueue;
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struct workqueue_struct *m_sync_workqueue;
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struct workqueue_struct *m_blockgc_wq;
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struct workqueue_struct *m_inodegc_wq;
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int m_bsize; /* fs logical block size */
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uint8_t m_blkbit_log; /* blocklog + NBBY */
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uint8_t m_blkbb_log; /* blocklog - BBSHIFT */
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uint8_t m_agno_log; /* log #ag's */
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uint8_t m_sectbb_log; /* sectlog - BBSHIFT */
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uint m_blockmask; /* sb_blocksize-1 */
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uint m_blockwsize; /* sb_blocksize in words */
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uint m_blockwmask; /* blockwsize-1 */
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uint m_alloc_mxr[2]; /* max alloc btree records */
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uint m_alloc_mnr[2]; /* min alloc btree records */
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uint m_bmap_dmxr[2]; /* max bmap btree records */
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uint m_bmap_dmnr[2]; /* min bmap btree records */
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uint m_rmap_mxr[2]; /* max rmap btree records */
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uint m_rmap_mnr[2]; /* min rmap btree records */
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uint m_refc_mxr[2]; /* max refc btree records */
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uint m_refc_mnr[2]; /* min refc btree records */
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uint m_alloc_maxlevels; /* max alloc btree levels */
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uint m_bm_maxlevels[2]; /* max bmap btree levels */
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uint m_rmap_maxlevels; /* max rmap btree levels */
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uint m_refc_maxlevels; /* max refcount btree level */
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unsigned int m_agbtree_maxlevels; /* max level of all AG btrees */
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xfs_extlen_t m_ag_prealloc_blocks; /* reserved ag blocks */
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uint m_alloc_set_aside; /* space we can't use */
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uint m_ag_max_usable; /* max space per AG */
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int m_dalign; /* stripe unit */
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int m_swidth; /* stripe width */
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xfs_agnumber_t m_maxagi; /* highest inode alloc group */
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uint m_allocsize_log;/* min write size log bytes */
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uint m_allocsize_blocks; /* min write size blocks */
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int m_logbufs; /* number of log buffers */
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int m_logbsize; /* size of each log buffer */
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uint m_rsumlevels; /* rt summary levels */
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uint m_rsumsize; /* size of rt summary, bytes */
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int m_fixedfsid[2]; /* unchanged for life of FS */
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uint m_qflags; /* quota status flags */
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uint64_t m_features; /* active filesystem features */
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uint64_t m_low_space[XFS_LOWSP_MAX];
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uint64_t m_low_rtexts[XFS_LOWSP_MAX];
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struct xfs_ino_geometry m_ino_geo; /* inode geometry */
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struct xfs_trans_resv m_resv; /* precomputed res values */
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/* low free space thresholds */
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unsigned long m_opstate; /* dynamic state flags */
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bool m_always_cow;
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bool m_fail_unmount;
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bool m_finobt_nores; /* no per-AG finobt resv. */
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bool m_update_sb; /* sb needs update in mount */
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/*
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* Bitsets of per-fs metadata that have been checked and/or are sick.
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* Callers must hold m_sb_lock to access these two fields.
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*/
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uint8_t m_fs_checked;
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uint8_t m_fs_sick;
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/*
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* Bitsets of rt metadata that have been checked and/or are sick.
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* Callers must hold m_sb_lock to access this field.
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*/
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uint8_t m_rt_checked;
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uint8_t m_rt_sick;
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/*
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* End of read-mostly variables. Frequently written variables and locks
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* should be placed below this comment from now on. The first variable
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* here is marked as cacheline aligned so they it is separated from
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* the read-mostly variables.
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*/
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spinlock_t ____cacheline_aligned m_sb_lock; /* sb counter lock */
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struct percpu_counter m_icount; /* allocated inodes counter */
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struct percpu_counter m_ifree; /* free inodes counter */
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struct percpu_counter m_fdblocks; /* free block counter */
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struct percpu_counter m_frextents; /* free rt extent counter */
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/*
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* Count of data device blocks reserved for delayed allocations,
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* including indlen blocks. Does not include allocated CoW staging
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* extents or anything related to the rt device.
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*/
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struct percpu_counter m_delalloc_blks;
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/*
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* Global count of allocation btree blocks in use across all AGs. Only
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* used when perag reservation is enabled. Helps prevent block
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* reservation from attempting to reserve allocation btree blocks.
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*/
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atomic64_t m_allocbt_blks;
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struct radix_tree_root m_perag_tree; /* per-ag accounting info */
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spinlock_t m_perag_lock; /* lock for m_perag_tree */
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uint64_t m_resblks; /* total reserved blocks */
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uint64_t m_resblks_avail;/* available reserved blocks */
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uint64_t m_resblks_save; /* reserved blks @ remount,ro */
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struct delayed_work m_reclaim_work; /* background inode reclaim */
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struct xfs_kobj m_kobj;
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struct xfs_kobj m_error_kobj;
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struct xfs_kobj m_error_meta_kobj;
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struct xfs_error_cfg m_error_cfg[XFS_ERR_CLASS_MAX][XFS_ERR_ERRNO_MAX];
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struct xstats m_stats; /* per-fs stats */
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xfs_agnumber_t m_agfrotor; /* last ag where space found */
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atomic_t m_agirotor; /* last ag dir inode alloced */
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/* Memory shrinker to throttle and reprioritize inodegc */
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struct shrinker m_inodegc_shrinker;
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/*
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* Workqueue item so that we can coalesce multiple inode flush attempts
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* into a single flush.
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*/
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struct work_struct m_flush_inodes_work;
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/*
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* Generation of the filesysyem layout. This is incremented by each
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* growfs, and used by the pNFS server to ensure the client updates
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* its view of the block device once it gets a layout that might
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* reference the newly added blocks. Does not need to be persistent
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* as long as we only allow file system size increments, but if we
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* ever support shrinks it would have to be persisted in addition
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* to various other kinds of pain inflicted on the pNFS server.
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*/
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uint32_t m_generation;
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struct mutex m_growlock; /* growfs mutex */
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#ifdef DEBUG
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/*
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* Frequency with which errors are injected. Replaces xfs_etest; the
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* value stored in here is the inverse of the frequency with which the
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* error triggers. 1 = always, 2 = half the time, etc.
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*/
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unsigned int *m_errortag;
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struct xfs_kobj m_errortag_kobj;
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#endif
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} xfs_mount_t;
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#define M_IGEO(mp) (&(mp)->m_ino_geo)
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/*
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* Flags for m_features.
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*
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* These are all the active features in the filesystem, regardless of how
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* they are configured.
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*/
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#define XFS_FEAT_ATTR (1ULL << 0) /* xattrs present in fs */
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#define XFS_FEAT_NLINK (1ULL << 1) /* 32 bit link counts */
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#define XFS_FEAT_QUOTA (1ULL << 2) /* quota active */
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#define XFS_FEAT_ALIGN (1ULL << 3) /* inode alignment */
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#define XFS_FEAT_DALIGN (1ULL << 4) /* data alignment */
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#define XFS_FEAT_LOGV2 (1ULL << 5) /* version 2 logs */
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#define XFS_FEAT_SECTOR (1ULL << 6) /* sector size > 512 bytes */
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#define XFS_FEAT_EXTFLG (1ULL << 7) /* unwritten extents */
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#define XFS_FEAT_ASCIICI (1ULL << 8) /* ASCII only case-insens. */
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#define XFS_FEAT_LAZYSBCOUNT (1ULL << 9) /* Superblk counters */
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#define XFS_FEAT_ATTR2 (1ULL << 10) /* dynamic attr fork */
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#define XFS_FEAT_PARENT (1ULL << 11) /* parent pointers */
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#define XFS_FEAT_PROJID32 (1ULL << 12) /* 32 bit project id */
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#define XFS_FEAT_CRC (1ULL << 13) /* metadata CRCs */
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#define XFS_FEAT_V3INODES (1ULL << 14) /* Version 3 inodes */
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#define XFS_FEAT_PQUOTINO (1ULL << 15) /* non-shared proj/grp quotas */
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#define XFS_FEAT_FTYPE (1ULL << 16) /* inode type in dir */
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#define XFS_FEAT_FINOBT (1ULL << 17) /* free inode btree */
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#define XFS_FEAT_RMAPBT (1ULL << 18) /* reverse map btree */
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#define XFS_FEAT_REFLINK (1ULL << 19) /* reflinked files */
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#define XFS_FEAT_SPINODES (1ULL << 20) /* sparse inode chunks */
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#define XFS_FEAT_META_UUID (1ULL << 21) /* metadata UUID */
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#define XFS_FEAT_REALTIME (1ULL << 22) /* realtime device present */
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#define XFS_FEAT_INOBTCNT (1ULL << 23) /* inobt block counts */
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#define XFS_FEAT_BIGTIME (1ULL << 24) /* large timestamps */
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#define XFS_FEAT_NEEDSREPAIR (1ULL << 25) /* needs xfs_repair */
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#define XFS_FEAT_NREXT64 (1ULL << 26) /* large extent counters */
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/* Mount features */
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#define XFS_FEAT_NOATTR2 (1ULL << 48) /* disable attr2 creation */
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#define XFS_FEAT_NOALIGN (1ULL << 49) /* ignore alignment */
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#define XFS_FEAT_ALLOCSIZE (1ULL << 50) /* user specified allocation size */
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#define XFS_FEAT_LARGE_IOSIZE (1ULL << 51) /* report large preferred
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* I/O size in stat() */
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#define XFS_FEAT_WSYNC (1ULL << 52) /* synchronous metadata ops */
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#define XFS_FEAT_DIRSYNC (1ULL << 53) /* synchronous directory ops */
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#define XFS_FEAT_DISCARD (1ULL << 54) /* discard unused blocks */
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#define XFS_FEAT_GRPID (1ULL << 55) /* group-ID assigned from directory */
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#define XFS_FEAT_SMALL_INUMS (1ULL << 56) /* user wants 32bit inodes */
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#define XFS_FEAT_IKEEP (1ULL << 57) /* keep empty inode clusters*/
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#define XFS_FEAT_SWALLOC (1ULL << 58) /* stripe width allocation */
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#define XFS_FEAT_FILESTREAMS (1ULL << 59) /* use filestreams allocator */
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#define XFS_FEAT_DAX_ALWAYS (1ULL << 60) /* DAX always enabled */
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#define XFS_FEAT_DAX_NEVER (1ULL << 61) /* DAX never enabled */
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#define XFS_FEAT_NORECOVERY (1ULL << 62) /* no recovery - dirty fs */
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#define XFS_FEAT_NOUUID (1ULL << 63) /* ignore uuid during mount */
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#define __XFS_HAS_FEAT(name, NAME) \
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static inline bool xfs_has_ ## name (struct xfs_mount *mp) \
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{ \
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return mp->m_features & XFS_FEAT_ ## NAME; \
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}
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/* Some features can be added dynamically so they need a set wrapper, too. */
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#define __XFS_ADD_FEAT(name, NAME) \
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__XFS_HAS_FEAT(name, NAME); \
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static inline void xfs_add_ ## name (struct xfs_mount *mp) \
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{ \
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mp->m_features |= XFS_FEAT_ ## NAME; \
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xfs_sb_version_add ## name(&mp->m_sb); \
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}
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/* Superblock features */
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__XFS_ADD_FEAT(attr, ATTR)
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__XFS_HAS_FEAT(nlink, NLINK)
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__XFS_ADD_FEAT(quota, QUOTA)
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__XFS_HAS_FEAT(align, ALIGN)
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__XFS_HAS_FEAT(dalign, DALIGN)
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__XFS_HAS_FEAT(logv2, LOGV2)
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__XFS_HAS_FEAT(sector, SECTOR)
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__XFS_HAS_FEAT(extflg, EXTFLG)
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__XFS_HAS_FEAT(asciici, ASCIICI)
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__XFS_HAS_FEAT(lazysbcount, LAZYSBCOUNT)
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__XFS_ADD_FEAT(attr2, ATTR2)
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__XFS_HAS_FEAT(parent, PARENT)
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__XFS_ADD_FEAT(projid32, PROJID32)
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__XFS_HAS_FEAT(crc, CRC)
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__XFS_HAS_FEAT(v3inodes, V3INODES)
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__XFS_HAS_FEAT(pquotino, PQUOTINO)
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__XFS_HAS_FEAT(ftype, FTYPE)
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__XFS_HAS_FEAT(finobt, FINOBT)
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__XFS_HAS_FEAT(rmapbt, RMAPBT)
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__XFS_HAS_FEAT(reflink, REFLINK)
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__XFS_HAS_FEAT(sparseinodes, SPINODES)
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__XFS_HAS_FEAT(metauuid, META_UUID)
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__XFS_HAS_FEAT(realtime, REALTIME)
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__XFS_HAS_FEAT(inobtcounts, INOBTCNT)
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__XFS_HAS_FEAT(bigtime, BIGTIME)
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__XFS_HAS_FEAT(needsrepair, NEEDSREPAIR)
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__XFS_HAS_FEAT(large_extent_counts, NREXT64)
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/*
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* Mount features
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*
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* These do not change dynamically - features that can come and go, such as 32
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* bit inodes and read-only state, are kept as operational state rather than
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* features.
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*/
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__XFS_HAS_FEAT(noattr2, NOATTR2)
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__XFS_HAS_FEAT(noalign, NOALIGN)
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__XFS_HAS_FEAT(allocsize, ALLOCSIZE)
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__XFS_HAS_FEAT(large_iosize, LARGE_IOSIZE)
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__XFS_HAS_FEAT(wsync, WSYNC)
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__XFS_HAS_FEAT(dirsync, DIRSYNC)
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__XFS_HAS_FEAT(discard, DISCARD)
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__XFS_HAS_FEAT(grpid, GRPID)
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__XFS_HAS_FEAT(small_inums, SMALL_INUMS)
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__XFS_HAS_FEAT(ikeep, IKEEP)
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__XFS_HAS_FEAT(swalloc, SWALLOC)
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__XFS_HAS_FEAT(filestreams, FILESTREAMS)
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__XFS_HAS_FEAT(dax_always, DAX_ALWAYS)
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__XFS_HAS_FEAT(dax_never, DAX_NEVER)
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__XFS_HAS_FEAT(norecovery, NORECOVERY)
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__XFS_HAS_FEAT(nouuid, NOUUID)
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/*
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* Operational mount state flags
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*
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* Use these with atomic bit ops only!
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*/
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#define XFS_OPSTATE_UNMOUNTING 0 /* filesystem is unmounting */
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#define XFS_OPSTATE_CLEAN 1 /* mount was clean */
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#define XFS_OPSTATE_SHUTDOWN 2 /* stop all fs operations */
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#define XFS_OPSTATE_INODE32 3 /* inode32 allocator active */
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#define XFS_OPSTATE_READONLY 4 /* read-only fs */
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/*
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* If set, inactivation worker threads will be scheduled to process queued
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* inodegc work. If not, queued inodes remain in memory waiting to be
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* processed.
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*/
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#define XFS_OPSTATE_INODEGC_ENABLED 5
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/*
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* If set, background speculative prealloc gc worker threads will be scheduled
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* to process queued blockgc work. If not, inodes retain their preallocations
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* until explicitly deleted.
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*/
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#define XFS_OPSTATE_BLOCKGC_ENABLED 6
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/* Kernel has logged a warning about online fsck being used on this fs. */
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#define XFS_OPSTATE_WARNED_SCRUB 7
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/* Kernel has logged a warning about shrink being used on this fs. */
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#define XFS_OPSTATE_WARNED_SHRINK 8
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/* Kernel has logged a warning about logged xattr updates being used. */
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#define XFS_OPSTATE_WARNED_LARP 9
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|
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#define __XFS_IS_OPSTATE(name, NAME) \
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static inline bool xfs_is_ ## name (struct xfs_mount *mp) \
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{ \
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return test_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
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} \
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static inline bool xfs_clear_ ## name (struct xfs_mount *mp) \
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{ \
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return test_and_clear_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
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} \
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static inline bool xfs_set_ ## name (struct xfs_mount *mp) \
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{ \
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return test_and_set_bit(XFS_OPSTATE_ ## NAME, &mp->m_opstate); \
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}
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|
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__XFS_IS_OPSTATE(unmounting, UNMOUNTING)
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__XFS_IS_OPSTATE(clean, CLEAN)
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__XFS_IS_OPSTATE(shutdown, SHUTDOWN)
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__XFS_IS_OPSTATE(inode32, INODE32)
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__XFS_IS_OPSTATE(readonly, READONLY)
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__XFS_IS_OPSTATE(inodegc_enabled, INODEGC_ENABLED)
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__XFS_IS_OPSTATE(blockgc_enabled, BLOCKGC_ENABLED)
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|
|
|
static inline bool
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|
xfs_should_warn(struct xfs_mount *mp, long nr)
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|
{
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return !test_and_set_bit(nr, &mp->m_opstate);
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|
}
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|
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|
#define XFS_OPSTATE_STRINGS \
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{ (1UL << XFS_OPSTATE_UNMOUNTING), "unmounting" }, \
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{ (1UL << XFS_OPSTATE_CLEAN), "clean" }, \
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{ (1UL << XFS_OPSTATE_SHUTDOWN), "shutdown" }, \
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{ (1UL << XFS_OPSTATE_INODE32), "inode32" }, \
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{ (1UL << XFS_OPSTATE_READONLY), "read_only" }, \
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{ (1UL << XFS_OPSTATE_INODEGC_ENABLED), "inodegc" }, \
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{ (1UL << XFS_OPSTATE_BLOCKGC_ENABLED), "blockgc" }, \
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{ (1UL << XFS_OPSTATE_WARNED_SCRUB), "wscrub" }, \
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{ (1UL << XFS_OPSTATE_WARNED_SHRINK), "wshrink" }, \
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{ (1UL << XFS_OPSTATE_WARNED_LARP), "wlarp" }
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|
|
|
/*
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|
* Max and min values for mount-option defined I/O
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|
* preallocation sizes.
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|
*/
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|
#define XFS_MAX_IO_LOG 30 /* 1G */
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|
#define XFS_MIN_IO_LOG PAGE_SHIFT
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|
|
|
void xfs_do_force_shutdown(struct xfs_mount *mp, uint32_t flags, char *fname,
|
|
int lnnum);
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|
#define xfs_force_shutdown(m,f) \
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|
xfs_do_force_shutdown(m, f, __FILE__, __LINE__)
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|
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|
#define SHUTDOWN_META_IO_ERROR (1u << 0) /* write attempt to metadata failed */
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|
#define SHUTDOWN_LOG_IO_ERROR (1u << 1) /* write attempt to the log failed */
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|
#define SHUTDOWN_FORCE_UMOUNT (1u << 2) /* shutdown from a forced unmount */
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|
#define SHUTDOWN_CORRUPT_INCORE (1u << 3) /* corrupt in-memory structures */
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|
#define SHUTDOWN_CORRUPT_ONDISK (1u << 4) /* corrupt metadata on device */
|
|
|
|
#define XFS_SHUTDOWN_STRINGS \
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|
{ SHUTDOWN_META_IO_ERROR, "metadata_io" }, \
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|
{ SHUTDOWN_LOG_IO_ERROR, "log_io" }, \
|
|
{ SHUTDOWN_FORCE_UMOUNT, "force_umount" }, \
|
|
{ SHUTDOWN_CORRUPT_INCORE, "corruption" }
|
|
|
|
/*
|
|
* 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
|
|
|
|
/*
|
|
* Estimate the amount of free space that is not available to userspace and is
|
|
* not explicitly reserved from the incore fdblocks. This includes:
|
|
*
|
|
* - The minimum number of blocks needed to support splitting a bmap btree
|
|
* - The blocks currently in use by the freespace btrees because they record
|
|
* the actual blocks that will fill per-AG metadata space reservations
|
|
*/
|
|
static inline uint64_t
|
|
xfs_fdblocks_unavailable(
|
|
struct xfs_mount *mp)
|
|
{
|
|
return mp->m_alloc_set_aside + atomic64_read(&mp->m_allocbt_blks);
|
|
}
|
|
|
|
int xfs_mod_freecounter(struct xfs_mount *mp, struct percpu_counter *counter,
|
|
int64_t delta, bool rsvd);
|
|
|
|
static inline int
|
|
xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, bool reserved)
|
|
{
|
|
return xfs_mod_freecounter(mp, &mp->m_fdblocks, delta, reserved);
|
|
}
|
|
|
|
static inline int
|
|
xfs_mod_frextents(struct xfs_mount *mp, int64_t delta)
|
|
{
|
|
return xfs_mod_freecounter(mp, &mp->m_frextents, delta, false);
|
|
}
|
|
|
|
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);
|
|
int xfs_add_incompat_log_feature(struct xfs_mount *mp, uint32_t feature);
|
|
bool xfs_clear_incompat_log_features(struct xfs_mount *mp);
|
|
void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
|
|
|
|
#endif /* __XFS_MOUNT_H__ */
|