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 9 struct xfs_buf; 10 struct xfs_btree_cur; 11 struct xfs_mount; 12 struct xfs_perag; 13 struct xfs_trans; 14 15 extern struct workqueue_struct *xfs_alloc_wq; 16 17 unsigned int xfs_agfl_size(struct xfs_mount *mp); 18 19 /* 20 * Freespace allocation types. Argument to xfs_alloc_[v]extent. 21 */ 22 #define XFS_ALLOCTYPE_FIRST_AG 0x02 /* ... start at ag 0 */ 23 #define XFS_ALLOCTYPE_THIS_AG 0x08 /* anywhere in this a.g. */ 24 #define XFS_ALLOCTYPE_START_BNO 0x10 /* near this block else anywhere */ 25 #define XFS_ALLOCTYPE_NEAR_BNO 0x20 /* in this a.g. and near this block */ 26 #define XFS_ALLOCTYPE_THIS_BNO 0x40 /* at exactly this block */ 27 28 /* this should become an enum again when the tracing code is fixed */ 29 typedef unsigned int xfs_alloctype_t; 30 31 #define XFS_ALLOC_TYPES \ 32 { XFS_ALLOCTYPE_FIRST_AG, "FIRST_AG" }, \ 33 { XFS_ALLOCTYPE_THIS_AG, "THIS_AG" }, \ 34 { XFS_ALLOCTYPE_START_BNO, "START_BNO" }, \ 35 { XFS_ALLOCTYPE_NEAR_BNO, "NEAR_BNO" }, \ 36 { XFS_ALLOCTYPE_THIS_BNO, "THIS_BNO" } 37 38 /* 39 * Flags for xfs_alloc_fix_freelist. 40 */ 41 #define XFS_ALLOC_FLAG_TRYLOCK 0x00000001 /* use trylock for buffer locking */ 42 #define XFS_ALLOC_FLAG_FREEING 0x00000002 /* indicate caller is freeing extents*/ 43 #define XFS_ALLOC_FLAG_NORMAP 0x00000004 /* don't modify the rmapbt */ 44 #define XFS_ALLOC_FLAG_NOSHRINK 0x00000008 /* don't shrink the freelist */ 45 #define XFS_ALLOC_FLAG_CHECK 0x00000010 /* test only, don't modify args */ 46 47 /* 48 * Argument structure for xfs_alloc routines. 49 * This is turned into a structure to avoid having 20 arguments passed 50 * down several levels of the stack. 51 */ 52 typedef struct xfs_alloc_arg { 53 struct xfs_trans *tp; /* transaction pointer */ 54 struct xfs_mount *mp; /* file system mount point */ 55 struct xfs_buf *agbp; /* buffer for a.g. freelist header */ 56 struct xfs_perag *pag; /* per-ag struct for this agno */ 57 xfs_fsblock_t fsbno; /* file system block number */ 58 xfs_agnumber_t agno; /* allocation group number */ 59 xfs_agblock_t agbno; /* allocation group-relative block # */ 60 xfs_extlen_t minlen; /* minimum size of extent */ 61 xfs_extlen_t maxlen; /* maximum size of extent */ 62 xfs_extlen_t mod; /* mod value for extent size */ 63 xfs_extlen_t prod; /* prod value for extent size */ 64 xfs_extlen_t minleft; /* min blocks must be left after us */ 65 xfs_extlen_t total; /* total blocks needed in xaction */ 66 xfs_extlen_t alignment; /* align answer to multiple of this */ 67 xfs_extlen_t minalignslop; /* slop for minlen+alignment calcs */ 68 xfs_agblock_t min_agbno; /* set an agbno range for NEAR allocs */ 69 xfs_agblock_t max_agbno; /* ... */ 70 xfs_extlen_t len; /* output: actual size of extent */ 71 xfs_alloctype_t type; /* allocation type XFS_ALLOCTYPE_... */ 72 xfs_alloctype_t otype; /* original allocation type */ 73 int datatype; /* mask defining data type treatment */ 74 char wasdel; /* set if allocation was prev delayed */ 75 char wasfromfl; /* set if allocation is from freelist */ 76 struct xfs_owner_info oinfo; /* owner of blocks being allocated */ 77 enum xfs_ag_resv_type resv; /* block reservation to use */ 78 #ifdef DEBUG 79 bool alloc_minlen_only; /* allocate exact minlen extent */ 80 #endif 81 } xfs_alloc_arg_t; 82 83 /* 84 * Defines for datatype 85 */ 86 #define XFS_ALLOC_USERDATA (1 << 0)/* allocation is for user data*/ 87 #define XFS_ALLOC_INITIAL_USER_DATA (1 << 1)/* special case start of file */ 88 #define XFS_ALLOC_NOBUSY (1 << 2)/* Busy extents not allowed */ 89 90 /* freespace limit calculations */ 91 unsigned int xfs_alloc_set_aside(struct xfs_mount *mp); 92 unsigned int xfs_alloc_ag_max_usable(struct xfs_mount *mp); 93 94 xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_perag *pag, 95 xfs_extlen_t need, xfs_extlen_t reserved); 96 unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp, 97 struct xfs_perag *pag); 98 int xfs_alloc_get_freelist(struct xfs_perag *pag, struct xfs_trans *tp, 99 struct xfs_buf *agfbp, xfs_agblock_t *bnop, int btreeblk); 100 int xfs_alloc_put_freelist(struct xfs_perag *pag, struct xfs_trans *tp, 101 struct xfs_buf *agfbp, struct xfs_buf *agflbp, 102 xfs_agblock_t bno, int btreeblk); 103 104 /* 105 * Compute and fill in value of m_alloc_maxlevels. 106 */ 107 void 108 xfs_alloc_compute_maxlevels( 109 struct xfs_mount *mp); /* file system mount structure */ 110 111 /* 112 * Log the given fields from the agf structure. 113 */ 114 void 115 xfs_alloc_log_agf( 116 struct xfs_trans *tp, /* transaction pointer */ 117 struct xfs_buf *bp, /* buffer for a.g. freelist header */ 118 uint32_t fields);/* mask of fields to be logged (XFS_AGF_...) */ 119 120 /* 121 * Allocate an extent (variable-size). 122 */ 123 int /* error */ 124 xfs_alloc_vextent( 125 xfs_alloc_arg_t *args); /* allocation argument structure */ 126 127 /* 128 * Free an extent. 129 */ 130 int /* error */ 131 __xfs_free_extent( 132 struct xfs_trans *tp, /* transaction pointer */ 133 xfs_fsblock_t bno, /* starting block number of extent */ 134 xfs_extlen_t len, /* length of extent */ 135 const struct xfs_owner_info *oinfo, /* extent owner */ 136 enum xfs_ag_resv_type type, /* block reservation type */ 137 bool skip_discard); 138 139 static inline int 140 xfs_free_extent( 141 struct xfs_trans *tp, 142 xfs_fsblock_t bno, 143 xfs_extlen_t len, 144 const struct xfs_owner_info *oinfo, 145 enum xfs_ag_resv_type type) 146 { 147 return __xfs_free_extent(tp, bno, len, oinfo, type, false); 148 } 149 150 int /* error */ 151 xfs_alloc_lookup_le( 152 struct xfs_btree_cur *cur, /* btree cursor */ 153 xfs_agblock_t bno, /* starting block of extent */ 154 xfs_extlen_t len, /* length of extent */ 155 int *stat); /* success/failure */ 156 157 int /* error */ 158 xfs_alloc_lookup_ge( 159 struct xfs_btree_cur *cur, /* btree cursor */ 160 xfs_agblock_t bno, /* starting block of extent */ 161 xfs_extlen_t len, /* length of extent */ 162 int *stat); /* success/failure */ 163 164 int /* error */ 165 xfs_alloc_get_rec( 166 struct xfs_btree_cur *cur, /* btree cursor */ 167 xfs_agblock_t *bno, /* output: starting block of extent */ 168 xfs_extlen_t *len, /* output: length of extent */ 169 int *stat); /* output: success/failure */ 170 171 int xfs_read_agf(struct xfs_perag *pag, struct xfs_trans *tp, int flags, 172 struct xfs_buf **agfbpp); 173 int xfs_alloc_read_agf(struct xfs_perag *pag, struct xfs_trans *tp, int flags, 174 struct xfs_buf **agfbpp); 175 int xfs_alloc_read_agfl(struct xfs_perag *pag, struct xfs_trans *tp, 176 struct xfs_buf **bpp); 177 int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t, 178 struct xfs_buf *, struct xfs_owner_info *); 179 int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags); 180 int xfs_free_extent_fix_freelist(struct xfs_trans *tp, struct xfs_perag *pag, 181 struct xfs_buf **agbp); 182 183 xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp); 184 185 typedef int (*xfs_alloc_query_range_fn)( 186 struct xfs_btree_cur *cur, 187 const struct xfs_alloc_rec_incore *rec, 188 void *priv); 189 190 int xfs_alloc_query_range(struct xfs_btree_cur *cur, 191 const struct xfs_alloc_rec_incore *low_rec, 192 const struct xfs_alloc_rec_incore *high_rec, 193 xfs_alloc_query_range_fn fn, void *priv); 194 int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn, 195 void *priv); 196 197 int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, 198 xfs_extlen_t len, bool *exist); 199 200 typedef int (*xfs_agfl_walk_fn)(struct xfs_mount *mp, xfs_agblock_t bno, 201 void *priv); 202 int xfs_agfl_walk(struct xfs_mount *mp, struct xfs_agf *agf, 203 struct xfs_buf *agflbp, xfs_agfl_walk_fn walk_fn, void *priv); 204 205 static inline __be32 * 206 xfs_buf_to_agfl_bno( 207 struct xfs_buf *bp) 208 { 209 if (xfs_has_crc(bp->b_mount)) 210 return bp->b_addr + sizeof(struct xfs_agfl); 211 return bp->b_addr; 212 } 213 214 void __xfs_free_extent_later(struct xfs_trans *tp, xfs_fsblock_t bno, 215 xfs_filblks_t len, const struct xfs_owner_info *oinfo, 216 bool skip_discard); 217 218 /* 219 * List of extents to be free "later". 220 * The list is kept sorted on xbf_startblock. 221 */ 222 struct xfs_extent_free_item { 223 struct list_head xefi_list; 224 uint64_t xefi_owner; 225 xfs_fsblock_t xefi_startblock;/* starting fs block number */ 226 xfs_extlen_t xefi_blockcount;/* number of blocks in extent */ 227 unsigned int xefi_flags; 228 }; 229 230 #define XFS_EFI_SKIP_DISCARD (1U << 0) /* don't issue discard */ 231 #define XFS_EFI_ATTR_FORK (1U << 1) /* freeing attr fork block */ 232 #define XFS_EFI_BMBT_BLOCK (1U << 2) /* freeing bmap btree block */ 233 234 static inline void 235 xfs_free_extent_later( 236 struct xfs_trans *tp, 237 xfs_fsblock_t bno, 238 xfs_filblks_t len, 239 const struct xfs_owner_info *oinfo) 240 { 241 __xfs_free_extent_later(tp, bno, len, oinfo, false); 242 } 243 244 245 extern struct kmem_cache *xfs_extfree_item_cache; 246 247 int __init xfs_extfree_intent_init_cache(void); 248 void xfs_extfree_intent_destroy_cache(void); 249 250 #endif /* __XFS_ALLOC_H__ */ 251