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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.4 * All Rights Reserved.5 */6#ifndef __XFS_ALLOC_H__7#define __XFS_ALLOC_H__8 9struct xfs_buf;10struct xfs_btree_cur;11struct xfs_mount;12struct xfs_perag;13struct xfs_trans;14 15extern struct workqueue_struct *xfs_alloc_wq;16 17unsigned int xfs_agfl_size(struct xfs_mount *mp);18 19/*20 * Flags for xfs_alloc_fix_freelist.21 */22#define XFS_ALLOC_FLAG_TRYLOCK (1U << 0) /* use trylock for buffer locking */23#define XFS_ALLOC_FLAG_FREEING (1U << 1) /* indicate caller is freeing extents*/24#define XFS_ALLOC_FLAG_NORMAP (1U << 2) /* don't modify the rmapbt */25#define XFS_ALLOC_FLAG_NOSHRINK (1U << 3) /* don't shrink the freelist */26#define XFS_ALLOC_FLAG_CHECK (1U << 4) /* test only, don't modify args */27#define XFS_ALLOC_FLAG_TRYFLUSH (1U << 5) /* don't wait in busy extent flush */28 29/*30 * Argument structure for xfs_alloc routines.31 * This is turned into a structure to avoid having 20 arguments passed32 * down several levels of the stack.33 */34typedef struct xfs_alloc_arg {35 struct xfs_trans *tp; /* transaction pointer */36 struct xfs_mount *mp; /* file system mount point */37 struct xfs_buf *agbp; /* buffer for a.g. freelist header */38 struct xfs_perag *pag; /* per-ag struct for this agno */39 xfs_fsblock_t fsbno; /* file system block number */40 xfs_agnumber_t agno; /* allocation group number */41 xfs_agblock_t agbno; /* allocation group-relative block # */42 xfs_extlen_t minlen; /* minimum size of extent */43 xfs_extlen_t maxlen; /* maximum size of extent */44 xfs_extlen_t mod; /* mod value for extent size */45 xfs_extlen_t prod; /* prod value for extent size */46 xfs_extlen_t minleft; /* min blocks must be left after us */47 xfs_extlen_t total; /* total blocks needed in xaction */48 xfs_extlen_t alignment; /* align answer to multiple of this */49 xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */50 xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */51 xfs_agblock_t max_agbno; /* ... */52 xfs_extlen_t len; /* output: actual size of extent */53 int datatype; /* mask defining data type treatment */54 char wasdel; /* set if allocation was prev delayed */55 char wasfromfl; /* set if allocation is from freelist */56 bool alloc_minlen_only; /* allocate exact minlen extent */57 struct xfs_owner_info oinfo; /* owner of blocks being allocated */58 enum xfs_ag_resv_type resv; /* block reservation to use */59} xfs_alloc_arg_t;60 61/*62 * Defines for datatype63 */64#define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/65#define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */66#define XFS_ALLOC_NOBUSY (1 << 2)/* Busy extents not allowed */67 68/* freespace limit calculations */69unsigned int xfs_alloc_set_aside(struct xfs_mount *mp);70unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp);71 72xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag,73 xfs_extlen_t need, xfs_extlen_t reserved);74unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,75 struct xfs_perag *pag);76int xfs_alloc_get_freelist(struct xfs_perag *pag, struct xfs_trans *tp,77 struct xfs_buf *agfbp, xfs_agblock_t *bnop, int btreeblk);78int xfs_alloc_put_freelist(struct xfs_perag *pag, struct xfs_trans *tp,79 struct xfs_buf *agfbp, struct xfs_buf *agflbp,80 xfs_agblock_t bno, int btreeblk);81int xfs_free_ag_extent(struct xfs_trans *tp, struct xfs_buf *agbp,82 xfs_agnumber_t agno, xfs_agblock_t bno,83 xfs_extlen_t len, const struct xfs_owner_info *oinfo,84 enum xfs_ag_resv_type type);85 86/*87 * Compute and fill in value of m_alloc_maxlevels.88 */89void90xfs_alloc_compute_maxlevels(91 struct xfs_mount *mp); /* file system mount structure */92 93/*94 * Log the given fields from the agf structure.95 */96void97xfs_alloc_log_agf(98 struct xfs_trans *tp, /* transaction pointer */99 struct xfs_buf *bp, /* buffer for a.g. freelist header */100 uint32_t fields);/* mask of fields to be logged (XFS_AGF_...) */101 102/*103 * Allocate an extent anywhere in the specific AG given. If there is no104 * space matching the requirements in that AG, then the allocation will fail.105 */106int xfs_alloc_vextent_this_ag(struct xfs_alloc_arg *args, xfs_agnumber_t agno);107 108/*109 * Allocate an extent as close to the target as possible. If there are not110 * viable candidates in the AG, then fail the allocation.111 */112int xfs_alloc_vextent_near_bno(struct xfs_alloc_arg *args,113 xfs_fsblock_t target);114 115/*116 * Allocate an extent exactly at the target given. If this is not possible117 * then the allocation fails.118 */119int xfs_alloc_vextent_exact_bno(struct xfs_alloc_arg *args,120 xfs_fsblock_t target);121 122/*123 * Best effort full filesystem allocation scan.124 *125 * Locality aware allocation will be attempted in the initial AG, but on failure126 * non-localised attempts will be made. The AGs are constrained by previous127 * allocations in the current transaction. Two passes will be made - the first128 * non-blocking, the second blocking.129 */130int xfs_alloc_vextent_start_ag(struct xfs_alloc_arg *args,131 xfs_fsblock_t target);132 133/*134 * Iterate from the AG indicated from args->fsbno through to the end of the135 * filesystem attempting blocking allocation. This is for use in last136 * resort allocation attempts when everything else has failed.137 */138int xfs_alloc_vextent_first_ag(struct xfs_alloc_arg *args,139 xfs_fsblock_t target);140 141/*142 * Free an extent.143 */144int /* error */145__xfs_free_extent(146 struct xfs_trans *tp, /* transaction pointer */147 struct xfs_perag *pag,148 xfs_agblock_t agbno,149 xfs_extlen_t len, /* length of extent */150 const struct xfs_owner_info *oinfo, /* extent owner */151 enum xfs_ag_resv_type type, /* block reservation type */152 bool skip_discard);153 154static inline int155xfs_free_extent(156 struct xfs_trans *tp,157 struct xfs_perag *pag,158 xfs_agblock_t agbno,159 xfs_extlen_t len,160 const struct xfs_owner_info *oinfo,161 enum xfs_ag_resv_type type)162{163 return __xfs_free_extent(tp, pag, agbno, len, oinfo, type, false);164}165 166int /* error */167xfs_alloc_lookup_le(168 struct xfs_btree_cur *cur, /* btree cursor */169 xfs_agblock_t bno, /* starting block of extent */170 xfs_extlen_t len, /* length of extent */171 int *stat); /* success/failure */172 173int /* error */174xfs_alloc_lookup_ge(175 struct xfs_btree_cur *cur, /* btree cursor */176 xfs_agblock_t bno, /* starting block of extent */177 xfs_extlen_t len, /* length of extent */178 int *stat); /* success/failure */179 180int /* error */181xfs_alloc_get_rec(182 struct xfs_btree_cur *cur, /* btree cursor */183 xfs_agblock_t *bno, /* output: starting block of extent */184 xfs_extlen_t *len, /* output: length of extent */185 int *stat); /* output: success/failure */186 187union xfs_btree_rec;188void xfs_alloc_btrec_to_irec(const union xfs_btree_rec *rec,189 struct xfs_alloc_rec_incore *irec);190xfs_failaddr_t xfs_alloc_check_irec(struct xfs_perag *pag,191 const struct xfs_alloc_rec_incore *irec);192 193int xfs_read_agf(struct xfs_perag *pag, struct xfs_trans *tp, int flags,194 struct xfs_buf **agfbpp);195int xfs_alloc_read_agf(struct xfs_perag *pag, struct xfs_trans *tp, int flags,196 struct xfs_buf **agfbpp);197int xfs_alloc_read_agfl(struct xfs_perag *pag, struct xfs_trans *tp,198 struct xfs_buf **bpp);199int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, uint32_t alloc_flags);200int xfs_free_extent_fix_freelist(struct xfs_trans *tp, struct xfs_perag *pag,201 struct xfs_buf **agbp);202 203xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);204 205typedef int (*xfs_alloc_query_range_fn)(206 struct xfs_btree_cur *cur,207 const struct xfs_alloc_rec_incore *rec,208 void *priv);209 210int xfs_alloc_query_range(struct xfs_btree_cur *cur,211 const struct xfs_alloc_rec_incore *low_rec,212 const struct xfs_alloc_rec_incore *high_rec,213 xfs_alloc_query_range_fn fn, void *priv);214int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn,215 void *priv);216 217int xfs_alloc_has_records(struct xfs_btree_cur *cur, xfs_agblock_t bno,218 xfs_extlen_t len, enum xbtree_recpacking *outcome);219 220typedef int (*xfs_agfl_walk_fn)(struct xfs_mount *mp, xfs_agblock_t bno,221 void *priv);222int xfs_agfl_walk(struct xfs_mount *mp, struct xfs_agf *agf,223 struct xfs_buf *agflbp, xfs_agfl_walk_fn walk_fn, void *priv);224 225static inline __be32 *226xfs_buf_to_agfl_bno(227 struct xfs_buf *bp)228{229 if (xfs_has_crc(bp->b_mount))230 return bp->b_addr + sizeof(struct xfs_agfl);231 return bp->b_addr;232}233 234int xfs_free_extent_later(struct xfs_trans *tp, xfs_fsblock_t bno,235 xfs_filblks_t len, const struct xfs_owner_info *oinfo,236 enum xfs_ag_resv_type type, unsigned int free_flags);237 238/* Don't issue a discard for the blocks freed. */239#define XFS_FREE_EXTENT_SKIP_DISCARD (1U << 0)240 241#define XFS_FREE_EXTENT_ALL_FLAGS (XFS_FREE_EXTENT_SKIP_DISCARD)242 243/*244 * List of extents to be free "later".245 * The list is kept sorted on xbf_startblock.246 */247struct xfs_extent_free_item {248 struct list_head xefi_list;249 uint64_t xefi_owner;250 xfs_fsblock_t xefi_startblock;/* starting fs block number */251 xfs_extlen_t xefi_blockcount;/* number of blocks in extent */252 struct xfs_perag *xefi_pag;253 unsigned int xefi_flags;254 enum xfs_ag_resv_type xefi_agresv;255};256 257#define XFS_EFI_SKIP_DISCARD (1U << 0) /* don't issue discard */258#define XFS_EFI_ATTR_FORK (1U << 1) /* freeing attr fork block */259#define XFS_EFI_BMBT_BLOCK (1U << 2) /* freeing bmap btree block */260#define XFS_EFI_CANCELLED (1U << 3) /* dont actually free the space */261 262struct xfs_alloc_autoreap {263 struct xfs_defer_pending *dfp;264};265 266int xfs_alloc_schedule_autoreap(const struct xfs_alloc_arg *args,267 unsigned int free_flags, struct xfs_alloc_autoreap *aarp);268void xfs_alloc_cancel_autoreap(struct xfs_trans *tp,269 struct xfs_alloc_autoreap *aarp);270void xfs_alloc_commit_autoreap(struct xfs_trans *tp,271 struct xfs_alloc_autoreap *aarp);272 273extern struct kmem_cache *xfs_extfree_item_cache;274 275int __init xfs_extfree_intent_init_cache(void);276void xfs_extfree_intent_destroy_cache(void);277 278xfs_failaddr_t xfs_validate_ag_length(struct xfs_buf *bp, uint32_t seqno,279 uint32_t length);280 281#endif /* __XFS_ALLOC_H__ */282