262 lines
8.8 KiB
C
262 lines
8.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_ALLOC_H__
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#define __XFS_ALLOC_H__
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struct xfs_buf;
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struct xfs_btree_cur;
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struct xfs_mount;
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struct xfs_perag;
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struct xfs_trans;
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extern struct workqueue_struct *xfs_alloc_wq;
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unsigned int xfs_agfl_size(struct xfs_mount *mp);
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/*
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* Flags for xfs_alloc_fix_freelist.
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*/
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#define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */
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#define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/
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#define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */
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#define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */
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#define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */
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/*
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* Argument structure for xfs_alloc routines.
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* This is turned into a structure to avoid having 20 arguments passed
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* down several levels of the stack.
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*/
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typedef struct xfs_alloc_arg {
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struct xfs_trans *tp; /* transaction pointer */
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struct xfs_mount *mp; /* file system mount point */
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struct xfs_buf *agbp; /* buffer for a.g. freelist header */
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struct xfs_perag *pag; /* per-ag struct for this agno */
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xfs_fsblock_t fsbno; /* file system block number */
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xfs_agnumber_t agno; /* allocation group number */
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xfs_agblock_t agbno; /* allocation group-relative block # */
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xfs_extlen_t minlen; /* minimum size of extent */
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xfs_extlen_t maxlen; /* maximum size of extent */
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xfs_extlen_t mod; /* mod value for extent size */
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xfs_extlen_t prod; /* prod value for extent size */
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xfs_extlen_t minleft; /* min blocks must be left after us */
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xfs_extlen_t total; /* total blocks needed in xaction */
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xfs_extlen_t alignment; /* align answer to multiple of this */
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xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */
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xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */
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xfs_agblock_t max_agbno; /* ... */
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xfs_extlen_t len; /* output: actual size of extent */
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int datatype; /* mask defining data type treatment */
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char wasdel; /* set if allocation was prev delayed */
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char wasfromfl; /* set if allocation is from freelist */
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struct xfs_owner_info oinfo; /* owner of blocks being allocated */
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enum xfs_ag_resv_type resv; /* block reservation to use */
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#ifdef DEBUG
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bool alloc_minlen_only; /* allocate exact minlen extent */
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#endif
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} xfs_alloc_arg_t;
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/*
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* Defines for datatype
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*/
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#define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/
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#define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */
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#define XFS_ALLOC_NOBUSY (1 << 2)/* Busy extents not allowed */
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/* freespace limit calculations */
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unsigned int xfs_alloc_set_aside(struct xfs_mount *mp);
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unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp);
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xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag,
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xfs_extlen_t need, xfs_extlen_t reserved);
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unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
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struct xfs_perag *pag);
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int xfs_alloc_get_freelist(struct xfs_perag *pag, struct xfs_trans *tp,
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struct xfs_buf *agfbp, xfs_agblock_t *bnop, int btreeblk);
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int xfs_alloc_put_freelist(struct xfs_perag *pag, struct xfs_trans *tp,
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struct xfs_buf *agfbp, struct xfs_buf *agflbp,
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xfs_agblock_t bno, int btreeblk);
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/*
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* Compute and fill in value of m_alloc_maxlevels.
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*/
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void
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xfs_alloc_compute_maxlevels(
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struct xfs_mount *mp); /* file system mount structure */
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/*
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* Log the given fields from the agf structure.
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*/
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void
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xfs_alloc_log_agf(
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struct xfs_trans *tp, /* transaction pointer */
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struct xfs_buf *bp, /* buffer for a.g. freelist header */
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uint32_t fields);/* mask of fields to be logged (XFS_AGF_...) */
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/*
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* Allocate an extent anywhere in the specific AG given. If there is no
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* space matching the requirements in that AG, then the allocation will fail.
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*/
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int xfs_alloc_vextent_this_ag(struct xfs_alloc_arg *args, xfs_agnumber_t agno);
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/*
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* Allocate an extent as close to the target as possible. If there are not
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* viable candidates in the AG, then fail the allocation.
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*/
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int xfs_alloc_vextent_near_bno(struct xfs_alloc_arg *args,
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xfs_fsblock_t target);
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/*
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* Allocate an extent exactly at the target given. If this is not possible
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* then the allocation fails.
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*/
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int xfs_alloc_vextent_exact_bno(struct xfs_alloc_arg *args,
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xfs_fsblock_t target);
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/*
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* Best effort full filesystem allocation scan.
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*
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* Locality aware allocation will be attempted in the initial AG, but on failure
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* non-localised attempts will be made. The AGs are constrained by previous
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* allocations in the current transaction. Two passes will be made - the first
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* non-blocking, the second blocking.
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*/
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int xfs_alloc_vextent_start_ag(struct xfs_alloc_arg *args,
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xfs_fsblock_t target);
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/*
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* Iterate from the AG indicated from args->fsbno through to the end of the
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* filesystem attempting blocking allocation. This is for use in last
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* resort allocation attempts when everything else has failed.
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*/
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int xfs_alloc_vextent_first_ag(struct xfs_alloc_arg *args,
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xfs_fsblock_t target);
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/*
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* Free an extent.
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*/
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int /* error */
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__xfs_free_extent(
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struct xfs_trans *tp, /* transaction pointer */
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xfs_fsblock_t bno, /* starting block number of extent */
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xfs_extlen_t len, /* length of extent */
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const struct xfs_owner_info *oinfo, /* extent owner */
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enum xfs_ag_resv_type type, /* block reservation type */
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bool skip_discard);
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static inline int
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xfs_free_extent(
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struct xfs_trans *tp,
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xfs_fsblock_t bno,
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xfs_extlen_t len,
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const struct xfs_owner_info *oinfo,
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enum xfs_ag_resv_type type)
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{
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return __xfs_free_extent(tp, bno, len, oinfo, type, false);
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}
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int /* error */
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xfs_alloc_lookup_le(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agblock_t bno, /* starting block of extent */
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xfs_extlen_t len, /* length of extent */
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int *stat); /* success/failure */
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int /* error */
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xfs_alloc_lookup_ge(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agblock_t bno, /* starting block of extent */
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xfs_extlen_t len, /* length of extent */
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int *stat); /* success/failure */
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int /* error */
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xfs_alloc_get_rec(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agblock_t *bno, /* output: starting block of extent */
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xfs_extlen_t *len, /* output: length of extent */
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int *stat); /* output: success/failure */
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int xfs_read_agf(struct xfs_perag *pag, struct xfs_trans *tp, int flags,
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struct xfs_buf **agfbpp);
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int xfs_alloc_read_agf(struct xfs_perag *pag, struct xfs_trans *tp, int flags,
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struct xfs_buf **agfbpp);
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int xfs_alloc_read_agfl(struct xfs_perag *pag, struct xfs_trans *tp,
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struct xfs_buf **bpp);
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int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t,
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struct xfs_buf *, struct xfs_owner_info *);
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int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags);
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int xfs_free_extent_fix_freelist(struct xfs_trans *tp, struct xfs_perag *pag,
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struct xfs_buf **agbp);
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xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);
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typedef int (*xfs_alloc_query_range_fn)(
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struct xfs_btree_cur *cur,
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const struct xfs_alloc_rec_incore *rec,
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void *priv);
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int xfs_alloc_query_range(struct xfs_btree_cur *cur,
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const struct xfs_alloc_rec_incore *low_rec,
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const struct xfs_alloc_rec_incore *high_rec,
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xfs_alloc_query_range_fn fn, void *priv);
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int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn,
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void *priv);
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int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
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xfs_extlen_t len, bool *exist);
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typedef int (*xfs_agfl_walk_fn)(struct xfs_mount *mp, xfs_agblock_t bno,
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void *priv);
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int xfs_agfl_walk(struct xfs_mount *mp, struct xfs_agf *agf,
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struct xfs_buf *agflbp, xfs_agfl_walk_fn walk_fn, void *priv);
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static inline __be32 *
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xfs_buf_to_agfl_bno(
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struct xfs_buf *bp)
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{
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if (xfs_has_crc(bp->b_mount))
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return bp->b_addr + sizeof(struct xfs_agfl);
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return bp->b_addr;
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}
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void __xfs_free_extent_later(struct xfs_trans *tp, xfs_fsblock_t bno,
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xfs_filblks_t len, const struct xfs_owner_info *oinfo,
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bool skip_discard);
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/*
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* List of extents to be free "later".
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* The list is kept sorted on xbf_startblock.
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*/
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struct xfs_extent_free_item {
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struct list_head xefi_list;
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uint64_t xefi_owner;
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xfs_fsblock_t xefi_startblock;/* starting fs block number */
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xfs_extlen_t xefi_blockcount;/* number of blocks in extent */
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unsigned int xefi_flags;
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};
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#define XFS_EFI_SKIP_DISCARD (1U << 0) /* don't issue discard */
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#define XFS_EFI_ATTR_FORK (1U << 1) /* freeing attr fork block */
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#define XFS_EFI_BMBT_BLOCK (1U << 2) /* freeing bmap btree block */
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static inline void
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xfs_free_extent_later(
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struct xfs_trans *tp,
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xfs_fsblock_t bno,
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xfs_filblks_t len,
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const struct xfs_owner_info *oinfo)
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{
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__xfs_free_extent_later(tp, bno, len, oinfo, false);
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}
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extern struct kmem_cache *xfs_extfree_item_cache;
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int __init xfs_extfree_intent_init_cache(void);
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void xfs_extfree_intent_destroy_cache(void);
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#endif /* __XFS_ALLOC_H__ */
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