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430 lines
16 KiB
430 lines
16 KiB
// 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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/* 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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* 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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/* |
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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_cil_workqueue; |
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struct workqueue_struct *m_reclaim_workqueue; |
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struct workqueue_struct *m_eofblocks_workqueue; |
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struct workqueue_struct *m_sync_workqueue; |
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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_ag_maxlevels; /* XFS_AG_MAXLEVELS */ |
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uint m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */ |
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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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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_flags; /* global mount flags */ |
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int64_t m_low_space[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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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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/* |
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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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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 delayed_work m_eofblocks_work; /* background eof blocks |
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trimming */ |
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struct delayed_work m_cowblocks_work; /* background cow blocks |
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trimming */ |
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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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xfs_agnumber_t m_agirotor; /* last ag dir inode alloced */ |
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spinlock_t m_agirotor_lock;/* .. and lock protecting it */ |
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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_flags. |
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*/ |
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#define XFS_MOUNT_WSYNC (1ULL << 0) /* for nfs - all metadata ops |
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must be synchronous except |
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for space allocations */ |
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#define XFS_MOUNT_UNMOUNTING (1ULL << 1) /* filesystem is unmounting */ |
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#define XFS_MOUNT_WAS_CLEAN (1ULL << 3) |
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#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem |
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operations, typically for |
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disk errors in metadata */ |
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#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */ |
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#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment |
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allocations */ |
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#define XFS_MOUNT_ATTR2 (1ULL << 8) /* allow use of attr2 format */ |
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#define XFS_MOUNT_GRPID (1ULL << 9) /* group-ID assigned from directory */ |
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#define XFS_MOUNT_NORECOVERY (1ULL << 10) /* no recovery - dirty fs */ |
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#define XFS_MOUNT_ALLOCSIZE (1ULL << 12) /* specified allocation size */ |
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#define XFS_MOUNT_SMALL_INUMS (1ULL << 14) /* user wants 32bit inodes */ |
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#define XFS_MOUNT_32BITINODES (1ULL << 15) /* inode32 allocator active */ |
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#define XFS_MOUNT_NOUUID (1ULL << 16) /* ignore uuid during mount */ |
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#define XFS_MOUNT_IKEEP (1ULL << 18) /* keep empty inode clusters*/ |
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#define XFS_MOUNT_SWALLOC (1ULL << 19) /* turn on stripe width |
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* allocation */ |
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#define XFS_MOUNT_RDONLY (1ULL << 20) /* read-only fs */ |
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#define XFS_MOUNT_DIRSYNC (1ULL << 21) /* synchronous directory ops */ |
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#define XFS_MOUNT_LARGEIO (1ULL << 22) /* report large preferred |
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* I/O size in stat() */ |
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#define XFS_MOUNT_FILESTREAMS (1ULL << 24) /* enable the filestreams |
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allocator */ |
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#define XFS_MOUNT_NOATTR2 (1ULL << 25) /* disable use of attr2 format */ |
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#define XFS_MOUNT_DAX_ALWAYS (1ULL << 26) |
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#define XFS_MOUNT_DAX_NEVER (1ULL << 27) |
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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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#define XFS_LAST_UNMOUNT_WAS_CLEAN(mp) \ |
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((mp)->m_flags & XFS_MOUNT_WAS_CLEAN) |
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#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN) |
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void xfs_do_force_shutdown(struct xfs_mount *mp, int flags, char *fname, |
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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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#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
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#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ |
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#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ |
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#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ |
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/* |
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* Flags for xfs_mountfs |
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*/ |
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#define XFS_MFSI_QUIET 0x40 /* Be silent if mount errors found */ |
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static inline xfs_agnumber_t |
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xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d) |
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{ |
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xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); |
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do_div(ld, mp->m_sb.sb_agblocks); |
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return (xfs_agnumber_t) ld; |
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} |
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static inline xfs_agblock_t |
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xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d) |
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{ |
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xfs_rfsblock_t ld = XFS_BB_TO_FSBT(mp, d); |
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return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks); |
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} |
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/* per-AG block reservation data structures*/ |
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struct xfs_ag_resv { |
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/* number of blocks originally reserved here */ |
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xfs_extlen_t ar_orig_reserved; |
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/* number of blocks reserved here */ |
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xfs_extlen_t ar_reserved; |
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/* number of blocks originally asked for */ |
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xfs_extlen_t ar_asked; |
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}; |
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/* |
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* Per-ag incore structure, copies of information in agf and agi, to improve the |
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* performance of allocation group selection. |
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*/ |
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typedef struct xfs_perag { |
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struct xfs_mount *pag_mount; /* owner filesystem */ |
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xfs_agnumber_t pag_agno; /* AG this structure belongs to */ |
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atomic_t pag_ref; /* perag reference count */ |
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char pagf_init; /* this agf's entry is initialized */ |
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char pagi_init; /* this agi's entry is initialized */ |
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char pagf_metadata; /* the agf is preferred to be metadata */ |
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char pagi_inodeok; /* The agi is ok for inodes */ |
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uint8_t pagf_levels[XFS_BTNUM_AGF]; |
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/* # of levels in bno & cnt btree */ |
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bool pagf_agflreset; /* agfl requires reset before use */ |
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uint32_t pagf_flcount; /* count of blocks in freelist */ |
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xfs_extlen_t pagf_freeblks; /* total free blocks */ |
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xfs_extlen_t pagf_longest; /* longest free space */ |
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uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */ |
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xfs_agino_t pagi_freecount; /* number of free inodes */ |
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xfs_agino_t pagi_count; /* number of allocated inodes */ |
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/* |
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* Inode allocation search lookup optimisation. |
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* If the pagino matches, the search for new inodes |
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* doesn't need to search the near ones again straight away |
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*/ |
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xfs_agino_t pagl_pagino; |
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xfs_agino_t pagl_leftrec; |
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xfs_agino_t pagl_rightrec; |
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/* |
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* Bitsets of per-ag metadata that have been checked and/or are sick. |
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* Callers should hold pag_state_lock before accessing this field. |
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*/ |
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uint16_t pag_checked; |
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uint16_t pag_sick; |
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spinlock_t pag_state_lock; |
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spinlock_t pagb_lock; /* lock for pagb_tree */ |
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struct rb_root pagb_tree; /* ordered tree of busy extents */ |
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unsigned int pagb_gen; /* generation count for pagb_tree */ |
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wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */ |
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atomic_t pagf_fstrms; /* # of filestreams active in this AG */ |
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spinlock_t pag_ici_lock; /* incore inode cache lock */ |
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struct radix_tree_root pag_ici_root; /* incore inode cache root */ |
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int pag_ici_reclaimable; /* reclaimable inodes */ |
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unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */ |
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/* buffer cache index */ |
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spinlock_t pag_buf_lock; /* lock for pag_buf_hash */ |
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struct rhashtable pag_buf_hash; |
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/* for rcu-safe freeing */ |
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struct rcu_head rcu_head; |
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int pagb_count; /* pagb slots in use */ |
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/* Blocks reserved for all kinds of metadata. */ |
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struct xfs_ag_resv pag_meta_resv; |
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/* Blocks reserved for the reverse mapping btree. */ |
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struct xfs_ag_resv pag_rmapbt_resv; |
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/* reference count */ |
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uint8_t pagf_refcount_level; |
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/* |
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* Unlinked inode information. This incore information reflects |
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* data stored in the AGI, so callers must hold the AGI buffer lock |
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* or have some other means to control concurrency. |
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*/ |
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struct rhashtable pagi_unlinked_hash; |
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} xfs_perag_t; |
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static inline struct xfs_ag_resv * |
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xfs_perag_resv( |
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struct xfs_perag *pag, |
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enum xfs_ag_resv_type type) |
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{ |
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switch (type) { |
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case XFS_AG_RESV_METADATA: |
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return &pag->pag_meta_resv; |
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case XFS_AG_RESV_RMAPBT: |
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return &pag->pag_rmapbt_resv; |
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default: |
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return NULL; |
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} |
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} |
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int xfs_buf_hash_init(xfs_perag_t *pag); |
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void xfs_buf_hash_destroy(xfs_perag_t *pag); |
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extern void xfs_uuid_table_free(void); |
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extern int xfs_log_sbcount(xfs_mount_t *); |
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extern uint64_t xfs_default_resblks(xfs_mount_t *mp); |
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extern int xfs_mountfs(xfs_mount_t *mp); |
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extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount, |
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xfs_agnumber_t *maxagi); |
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extern void xfs_unmountfs(xfs_mount_t *); |
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extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta, |
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bool reserved); |
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extern int xfs_mod_frextents(struct xfs_mount *mp, int64_t delta); |
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extern int xfs_readsb(xfs_mount_t *, int); |
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extern void xfs_freesb(xfs_mount_t *); |
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extern bool xfs_fs_writable(struct xfs_mount *mp, int level); |
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extern int xfs_sb_validate_fsb_count(struct xfs_sb *, uint64_t); |
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extern int xfs_dev_is_read_only(struct xfs_mount *, char *); |
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extern void xfs_set_low_space_thresholds(struct xfs_mount *); |
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int xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb, |
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xfs_off_t count_fsb); |
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struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp, |
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int error_class, int error); |
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void xfs_force_summary_recalc(struct xfs_mount *mp); |
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void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta); |
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#endif /* __XFS_MOUNT_H__ */
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