251 lines
8.4 KiB
C
251 lines
8.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*/
|
|
#ifndef __XFS_ALLOC_H__
|
|
#define __XFS_ALLOC_H__
|
|
|
|
struct xfs_buf;
|
|
struct xfs_btree_cur;
|
|
struct xfs_mount;
|
|
struct xfs_perag;
|
|
struct xfs_trans;
|
|
|
|
extern struct workqueue_struct *xfs_alloc_wq;
|
|
|
|
unsigned int xfs_agfl_size(struct xfs_mount *mp);
|
|
|
|
/*
|
|
* Freespace allocation types. Argument to xfs_alloc_[v]extent.
|
|
*/
|
|
#define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */
|
|
#define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */
|
|
#define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */
|
|
#define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */
|
|
#define XFS_ALLOCTYPE_THIS_BNO 0x40 /* at exactly this block */
|
|
|
|
/* this should become an enum again when the tracing code is fixed */
|
|
typedef unsigned int xfs_alloctype_t;
|
|
|
|
#define XFS_ALLOC_TYPES \
|
|
{ XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \
|
|
{ XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \
|
|
{ XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \
|
|
{ XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \
|
|
{ XFS_ALLOCTYPE_THIS_BNO, "THIS_BNO" }
|
|
|
|
/*
|
|
* Flags for xfs_alloc_fix_freelist.
|
|
*/
|
|
#define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */
|
|
#define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/
|
|
#define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */
|
|
#define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */
|
|
#define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */
|
|
|
|
/*
|
|
* Argument structure for xfs_alloc routines.
|
|
* This is turned into a structure to avoid having 20 arguments passed
|
|
* down several levels of the stack.
|
|
*/
|
|
typedef struct xfs_alloc_arg {
|
|
struct xfs_trans *tp; /* transaction pointer */
|
|
struct xfs_mount *mp; /* file system mount point */
|
|
struct xfs_buf *agbp; /* buffer for a.g. freelist header */
|
|
struct xfs_perag *pag; /* per-ag struct for this agno */
|
|
xfs_fsblock_t fsbno; /* file system block number */
|
|
xfs_agnumber_t agno; /* allocation group number */
|
|
xfs_agblock_t agbno; /* allocation group-relative block # */
|
|
xfs_extlen_t minlen; /* minimum size of extent */
|
|
xfs_extlen_t maxlen; /* maximum size of extent */
|
|
xfs_extlen_t mod; /* mod value for extent size */
|
|
xfs_extlen_t prod; /* prod value for extent size */
|
|
xfs_extlen_t minleft; /* min blocks must be left after us */
|
|
xfs_extlen_t total; /* total blocks needed in xaction */
|
|
xfs_extlen_t alignment; /* align answer to multiple of this */
|
|
xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */
|
|
xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */
|
|
xfs_agblock_t max_agbno; /* ... */
|
|
xfs_extlen_t len; /* output: actual size of extent */
|
|
xfs_alloctype_t type; /* allocation type XFS_ALLOCTYPE_... */
|
|
xfs_alloctype_t otype; /* original allocation type */
|
|
int datatype; /* mask defining data type treatment */
|
|
char wasdel; /* set if allocation was prev delayed */
|
|
char wasfromfl; /* set if allocation is from freelist */
|
|
struct xfs_owner_info oinfo; /* owner of blocks being allocated */
|
|
enum xfs_ag_resv_type resv; /* block reservation to use */
|
|
#ifdef DEBUG
|
|
bool alloc_minlen_only; /* allocate exact minlen extent */
|
|
#endif
|
|
} xfs_alloc_arg_t;
|
|
|
|
/*
|
|
* Defines for datatype
|
|
*/
|
|
#define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/
|
|
#define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */
|
|
#define XFS_ALLOC_NOBUSY (1 << 2)/* Busy extents not allowed */
|
|
|
|
/* freespace limit calculations */
|
|
unsigned int xfs_alloc_set_aside(struct xfs_mount *mp);
|
|
unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp);
|
|
|
|
xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag,
|
|
xfs_extlen_t need, xfs_extlen_t reserved);
|
|
unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
|
|
struct xfs_perag *pag);
|
|
int xfs_alloc_get_freelist(struct xfs_perag *pag, struct xfs_trans *tp,
|
|
struct xfs_buf *agfbp, xfs_agblock_t *bnop, int btreeblk);
|
|
int xfs_alloc_put_freelist(struct xfs_perag *pag, struct xfs_trans *tp,
|
|
struct xfs_buf *agfbp, struct xfs_buf *agflbp,
|
|
xfs_agblock_t bno, int btreeblk);
|
|
|
|
/*
|
|
* Compute and fill in value of m_alloc_maxlevels.
|
|
*/
|
|
void
|
|
xfs_alloc_compute_maxlevels(
|
|
struct xfs_mount *mp); /* file system mount structure */
|
|
|
|
/*
|
|
* Log the given fields from the agf structure.
|
|
*/
|
|
void
|
|
xfs_alloc_log_agf(
|
|
struct xfs_trans *tp, /* transaction pointer */
|
|
struct xfs_buf *bp, /* buffer for a.g. freelist header */
|
|
uint32_t fields);/* mask of fields to be logged (XFS_AGF_...) */
|
|
|
|
/*
|
|
* Allocate an extent (variable-size).
|
|
*/
|
|
int /* error */
|
|
xfs_alloc_vextent(
|
|
xfs_alloc_arg_t *args); /* allocation argument structure */
|
|
|
|
/*
|
|
* Free an extent.
|
|
*/
|
|
int /* error */
|
|
__xfs_free_extent(
|
|
struct xfs_trans *tp, /* transaction pointer */
|
|
xfs_fsblock_t bno, /* starting block number of extent */
|
|
xfs_extlen_t len, /* length of extent */
|
|
const struct xfs_owner_info *oinfo, /* extent owner */
|
|
enum xfs_ag_resv_type type, /* block reservation type */
|
|
bool skip_discard);
|
|
|
|
static inline int
|
|
xfs_free_extent(
|
|
struct xfs_trans *tp,
|
|
xfs_fsblock_t bno,
|
|
xfs_extlen_t len,
|
|
const struct xfs_owner_info *oinfo,
|
|
enum xfs_ag_resv_type type)
|
|
{
|
|
return __xfs_free_extent(tp, bno, len, oinfo, type, false);
|
|
}
|
|
|
|
int /* error */
|
|
xfs_alloc_lookup_le(
|
|
struct xfs_btree_cur *cur, /* btree cursor */
|
|
xfs_agblock_t bno, /* starting block of extent */
|
|
xfs_extlen_t len, /* length of extent */
|
|
int *stat); /* success/failure */
|
|
|
|
int /* error */
|
|
xfs_alloc_lookup_ge(
|
|
struct xfs_btree_cur *cur, /* btree cursor */
|
|
xfs_agblock_t bno, /* starting block of extent */
|
|
xfs_extlen_t len, /* length of extent */
|
|
int *stat); /* success/failure */
|
|
|
|
int /* error */
|
|
xfs_alloc_get_rec(
|
|
struct xfs_btree_cur *cur, /* btree cursor */
|
|
xfs_agblock_t *bno, /* output: starting block of extent */
|
|
xfs_extlen_t *len, /* output: length of extent */
|
|
int *stat); /* output: success/failure */
|
|
|
|
int xfs_read_agf(struct xfs_perag *pag, struct xfs_trans *tp, int flags,
|
|
struct xfs_buf **agfbpp);
|
|
int xfs_alloc_read_agf(struct xfs_perag *pag, struct xfs_trans *tp, int flags,
|
|
struct xfs_buf **agfbpp);
|
|
int xfs_alloc_read_agfl(struct xfs_perag *pag, struct xfs_trans *tp,
|
|
struct xfs_buf **bpp);
|
|
int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t,
|
|
struct xfs_buf *, struct xfs_owner_info *);
|
|
int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags);
|
|
int xfs_free_extent_fix_freelist(struct xfs_trans *tp, struct xfs_perag *pag,
|
|
struct xfs_buf **agbp);
|
|
|
|
xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);
|
|
|
|
typedef int (*xfs_alloc_query_range_fn)(
|
|
struct xfs_btree_cur *cur,
|
|
const struct xfs_alloc_rec_incore *rec,
|
|
void *priv);
|
|
|
|
int xfs_alloc_query_range(struct xfs_btree_cur *cur,
|
|
const struct xfs_alloc_rec_incore *low_rec,
|
|
const struct xfs_alloc_rec_incore *high_rec,
|
|
xfs_alloc_query_range_fn fn, void *priv);
|
|
int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn,
|
|
void *priv);
|
|
|
|
int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno,
|
|
xfs_extlen_t len, bool *exist);
|
|
|
|
typedef int (*xfs_agfl_walk_fn)(struct xfs_mount *mp, xfs_agblock_t bno,
|
|
void *priv);
|
|
int xfs_agfl_walk(struct xfs_mount *mp, struct xfs_agf *agf,
|
|
struct xfs_buf *agflbp, xfs_agfl_walk_fn walk_fn, void *priv);
|
|
|
|
static inline __be32 *
|
|
xfs_buf_to_agfl_bno(
|
|
struct xfs_buf *bp)
|
|
{
|
|
if (xfs_has_crc(bp->b_mount))
|
|
return bp->b_addr + sizeof(struct xfs_agfl);
|
|
return bp->b_addr;
|
|
}
|
|
|
|
void __xfs_free_extent_later(struct xfs_trans *tp, xfs_fsblock_t bno,
|
|
xfs_filblks_t len, const struct xfs_owner_info *oinfo,
|
|
bool skip_discard);
|
|
|
|
/*
|
|
* List of extents to be free "later".
|
|
* The list is kept sorted on xbf_startblock.
|
|
*/
|
|
struct xfs_extent_free_item {
|
|
struct list_head xefi_list;
|
|
uint64_t xefi_owner;
|
|
xfs_fsblock_t xefi_startblock;/* starting fs block number */
|
|
xfs_extlen_t xefi_blockcount;/* number of blocks in extent */
|
|
unsigned int xefi_flags;
|
|
};
|
|
|
|
#define XFS_EFI_SKIP_DISCARD (1U << 0) /* don't issue discard */
|
|
#define XFS_EFI_ATTR_FORK (1U << 1) /* freeing attr fork block */
|
|
#define XFS_EFI_BMBT_BLOCK (1U << 2) /* freeing bmap btree block */
|
|
|
|
static inline void
|
|
xfs_free_extent_later(
|
|
struct xfs_trans *tp,
|
|
xfs_fsblock_t bno,
|
|
xfs_filblks_t len,
|
|
const struct xfs_owner_info *oinfo)
|
|
{
|
|
__xfs_free_extent_later(tp, bno, len, oinfo, false);
|
|
}
|
|
|
|
|
|
extern struct kmem_cache *xfs_extfree_item_cache;
|
|
|
|
int __init xfs_extfree_intent_init_cache(void);
|
|
void xfs_extfree_intent_destroy_cache(void);
|
|
|
|
#endif /* __XFS_ALLOC_H__ */
|