/* 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);
/*
* Flags for xfs_alloc_fix_freelist .
*/
#define XFS_ALLOC_FLAG_TRYLOCK (1 U << 0 ) /* use trylock for buffer locking */
#define XFS_ALLOC_FLAG_FREEING (1 U << 1 ) /* indicate caller is freeing extents*/
#define XFS_ALLOC_FLAG_NORMAP (1 U << 2 ) /* don't modify the rmapbt */
#define XFS_ALLOC_FLAG_NOSHRINK (1 U << 3 ) /* don't shrink the freelist */
#define XFS_ALLOC_FLAG_CHECK (1 U << 4 ) /* test only, don't modify args */
#define XFS_ALLOC_FLAG_TRYFLUSH (1 U << 5 ) /* don't wait in busy extent flush */
/*
* 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 */
int datatype; /* mask defining data type treatment */
char wasdel; /* set if allocation was prev delayed */
char wasfromfl; /* set if allocation is from freelist */
bool alloc_minlen_only; /* allocate exact minlen extent */
struct xfs_owner_info oinfo; /* owner of blocks being allocated */
enum xfs_ag_resv_type resv; /* block reservation to use */
} 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);
int xfs_free_ag_extent(struct xfs_trans *tp, struct xfs_buf *agbp,
xfs_agblock_t bno, xfs_extlen_t len,
const struct xfs_owner_info *oinfo, enum xfs_ag_resv_type type);
/*
* 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 anywhere in the specific AG given . If there is no
* space matching the requirements in that AG , then the allocation will fail .
*/
int xfs_alloc_vextent_this_ag(struct xfs_alloc_arg *args, xfs_agnumber_t agno);
/*
* Allocate an extent as close to the target as possible . If there are not
* viable candidates in the AG , then fail the allocation .
*/
int xfs_alloc_vextent_near_bno(struct xfs_alloc_arg *args,
xfs_fsblock_t target);
/*
* Allocate an extent exactly at the target given . If this is not possible
* then the allocation fails .
*/
int xfs_alloc_vextent_exact_bno(struct xfs_alloc_arg *args,
xfs_fsblock_t target);
/*
* Best effort full filesystem allocation scan .
*
* Locality aware allocation will be attempted in the initial AG , but on failure
* non - localised attempts will be made . The AGs are constrained by previous
* allocations in the current transaction . Two passes will be made - the first
* non - blocking , the second blocking .
*/
int xfs_alloc_vextent_start_ag(struct xfs_alloc_arg *args,
xfs_fsblock_t target);
/*
* Iterate from the AG indicated from args - > fsbno through to the end of the
* filesystem attempting blocking allocation . This is for use in last
* resort allocation attempts when everything else has failed .
*/
int xfs_alloc_vextent_first_ag(struct xfs_alloc_arg *args,
xfs_fsblock_t target);
/*
* Free an extent .
*/
int /* error */
__xfs_free_extent(
struct xfs_trans *tp, /* transaction pointer */
struct xfs_perag *pag,
xfs_agblock_t agbno,
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,
struct xfs_perag *pag,
xfs_agblock_t agbno,
xfs_extlen_t len,
const struct xfs_owner_info *oinfo,
enum xfs_ag_resv_type type)
{
return __xfs_free_extent(tp, pag, agbno, 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 */
union xfs_btree_rec;
void xfs_alloc_btrec_to_irec(const union xfs_btree_rec *rec,
struct xfs_alloc_rec_incore *irec);
xfs_failaddr_t xfs_alloc_check_irec(struct xfs_perag *pag,
const struct xfs_alloc_rec_incore *irec);
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_alloc_fix_freelist(struct xfs_alloc_arg *args, uint32_t alloc_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_records(struct xfs_btree_cur *cur, xfs_agblock_t bno,
xfs_extlen_t len, enum xbtree_recpacking *outcome);
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;
}
int xfs_free_extent_later(struct xfs_trans *tp, xfs_fsblock_t bno,
xfs_filblks_t len, const struct xfs_owner_info *oinfo,
enum xfs_ag_resv_type type, unsigned int free_flags);
/* Don't issue a discard for the blocks freed. */
#define XFS_FREE_EXTENT_SKIP_DISCARD (1 U << 0 )
/* Free blocks on the realtime device. */
#define XFS_FREE_EXTENT_REALTIME (1 U << 1 )
#define XFS_FREE_EXTENT_ALL_FLAGS (XFS_FREE_EXTENT_SKIP_DISCARD | \
XFS_FREE_EXTENT_REALTIME)
/*
* 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 */
struct xfs_group *xefi_group;
unsigned int xefi_flags;
enum xfs_ag_resv_type xefi_agresv;
};
#define XFS_EFI_SKIP_DISCARD (1 U << 0 ) /* don't issue discard */
#define XFS_EFI_ATTR_FORK (1 U << 1 ) /* freeing attr fork block */
#define XFS_EFI_BMBT_BLOCK (1 U << 2 ) /* freeing bmap btree block */
#define XFS_EFI_CANCELLED (1 U << 3 ) /* dont actually free the space */
#define XFS_EFI_REALTIME (1 U << 4 ) /* freeing realtime extent */
static inline bool xfs_efi_is_realtime(const struct xfs_extent_free_item *xefi)
{
return xefi->xefi_flags & XFS_EFI_REALTIME;
}
struct xfs_alloc_autoreap {
struct xfs_defer_pending *dfp;
};
int xfs_alloc_schedule_autoreap(const struct xfs_alloc_arg *args,
unsigned int free_flags, struct xfs_alloc_autoreap *aarp);
void xfs_alloc_cancel_autoreap(struct xfs_trans *tp,
struct xfs_alloc_autoreap *aarp);
void xfs_alloc_commit_autoreap(struct xfs_trans *tp,
struct xfs_alloc_autoreap *aarp);
extern struct kmem_cache *xfs_extfree_item_cache;
int __init xfs_extfree_intent_init_cache(void );
void xfs_extfree_intent_destroy_cache(void );
xfs_failaddr_t xfs_validate_ag_length(struct xfs_buf *bp, uint32_t seqno,
uint32_t length);
#endif /* __XFS_ALLOC_H__ */
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