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 99 /* 100 * Compute and fill in value of m_alloc_maxlevels. 101 */ 102 void 103 xfs_alloc_compute_maxlevels( 104 struct xfs_mount *mp); /* file system mount structure */ 105 106 /* 107 * Get a block from the freelist. 108 * Returns with the buffer for the block gotten. 109 */ 110 int /* error */ 111 xfs_alloc_get_freelist( 112 struct xfs_trans *tp, /* transaction pointer */ 113 struct xfs_buf *agbp, /* buffer containing the agf structure */ 114 xfs_agblock_t *bnop, /* block address retrieved from freelist */ 115 int btreeblk); /* destination is a AGF btree */ 116 117 /* 118 * Log the given fields from the agf structure. 119 */ 120 void 121 xfs_alloc_log_agf( 122 struct xfs_trans *tp, /* transaction pointer */ 123 struct xfs_buf *bp, /* buffer for a.g. freelist header */ 124 int fields);/* mask of fields to be logged (XFS_AGF_...) */ 125 126 /* 127 * Interface for inode allocation to force the pag data to be initialized. 128 */ 129 int /* error */ 130 xfs_alloc_pagf_init( 131 struct xfs_mount *mp, /* file system mount structure */ 132 struct xfs_trans *tp, /* transaction pointer */ 133 xfs_agnumber_t agno, /* allocation group number */ 134 int flags); /* XFS_ALLOC_FLAGS_... */ 135 136 /* 137 * Put the block on the freelist for the allocation group. 138 */ 139 int /* error */ 140 xfs_alloc_put_freelist( 141 struct xfs_trans *tp, /* transaction pointer */ 142 struct xfs_buf *agbp, /* buffer for a.g. freelist header */ 143 struct xfs_buf *agflbp,/* buffer for a.g. free block array */ 144 xfs_agblock_t bno, /* block being freed */ 145 int btreeblk); /* owner was a AGF btree */ 146 147 /* 148 * Read in the allocation group header (free/alloc section). 149 */ 150 int /* error */ 151 xfs_alloc_read_agf( 152 struct xfs_mount *mp, /* mount point structure */ 153 struct xfs_trans *tp, /* transaction pointer */ 154 xfs_agnumber_t agno, /* allocation group number */ 155 int flags, /* XFS_ALLOC_FLAG_... */ 156 struct xfs_buf **bpp); /* buffer for the ag freelist header */ 157 158 /* 159 * Allocate an extent (variable-size). 160 */ 161 int /* error */ 162 xfs_alloc_vextent( 163 xfs_alloc_arg_t *args); /* allocation argument structure */ 164 165 /* 166 * Free an extent. 167 */ 168 int /* error */ 169 __xfs_free_extent( 170 struct xfs_trans *tp, /* transaction pointer */ 171 xfs_fsblock_t bno, /* starting block number of extent */ 172 xfs_extlen_t len, /* length of extent */ 173 const struct xfs_owner_info *oinfo, /* extent owner */ 174 enum xfs_ag_resv_type type, /* block reservation type */ 175 bool skip_discard); 176 177 static inline int 178 xfs_free_extent( 179 struct xfs_trans *tp, 180 xfs_fsblock_t bno, 181 xfs_extlen_t len, 182 const struct xfs_owner_info *oinfo, 183 enum xfs_ag_resv_type type) 184 { 185 return __xfs_free_extent(tp, bno, len, oinfo, type, false); 186 } 187 188 int /* error */ 189 xfs_alloc_lookup_le( 190 struct xfs_btree_cur *cur, /* btree cursor */ 191 xfs_agblock_t bno, /* starting block of extent */ 192 xfs_extlen_t len, /* length of extent */ 193 int *stat); /* success/failure */ 194 195 int /* error */ 196 xfs_alloc_lookup_ge( 197 struct xfs_btree_cur *cur, /* btree cursor */ 198 xfs_agblock_t bno, /* starting block of extent */ 199 xfs_extlen_t len, /* length of extent */ 200 int *stat); /* success/failure */ 201 202 int /* error */ 203 xfs_alloc_get_rec( 204 struct xfs_btree_cur *cur, /* btree cursor */ 205 xfs_agblock_t *bno, /* output: starting block of extent */ 206 xfs_extlen_t *len, /* output: length of extent */ 207 int *stat); /* output: success/failure */ 208 209 int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp, 210 xfs_agnumber_t agno, int flags, struct xfs_buf **bpp); 211 int xfs_alloc_read_agfl(struct xfs_mount *mp, struct xfs_trans *tp, 212 xfs_agnumber_t agno, struct xfs_buf **bpp); 213 int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t, 214 struct xfs_buf *, struct xfs_owner_info *); 215 int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags); 216 int xfs_free_extent_fix_freelist(struct xfs_trans *tp, struct xfs_perag *pag, 217 struct xfs_buf **agbp); 218 219 xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp); 220 221 typedef int (*xfs_alloc_query_range_fn)( 222 struct xfs_btree_cur *cur, 223 const struct xfs_alloc_rec_incore *rec, 224 void *priv); 225 226 int xfs_alloc_query_range(struct xfs_btree_cur *cur, 227 const struct xfs_alloc_rec_incore *low_rec, 228 const struct xfs_alloc_rec_incore *high_rec, 229 xfs_alloc_query_range_fn fn, void *priv); 230 int xfs_alloc_query_all(struct xfs_btree_cur *cur, xfs_alloc_query_range_fn fn, 231 void *priv); 232 233 int xfs_alloc_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, 234 xfs_extlen_t len, bool *exist); 235 236 typedef int (*xfs_agfl_walk_fn)(struct xfs_mount *mp, xfs_agblock_t bno, 237 void *priv); 238 int xfs_agfl_walk(struct xfs_mount *mp, struct xfs_agf *agf, 239 struct xfs_buf *agflbp, xfs_agfl_walk_fn walk_fn, void *priv); 240 241 static inline __be32 * 242 xfs_buf_to_agfl_bno( 243 struct xfs_buf *bp) 244 { 245 if (xfs_has_crc(bp->b_mount)) 246 return bp->b_addr + sizeof(struct xfs_agfl); 247 return bp->b_addr; 248 } 249 250 void __xfs_free_extent_later(struct xfs_trans *tp, xfs_fsblock_t bno, 251 xfs_filblks_t len, const struct xfs_owner_info *oinfo, 252 bool skip_discard); 253 254 /* 255 * List of extents to be free "later". 256 * The list is kept sorted on xbf_startblock. 257 */ 258 struct xfs_extent_free_item { 259 struct list_head xefi_list; 260 uint64_t xefi_owner; 261 xfs_fsblock_t xefi_startblock;/* starting fs block number */ 262 xfs_extlen_t xefi_blockcount;/* number of blocks in extent */ 263 unsigned int xefi_flags; 264 }; 265 266 #define XFS_EFI_SKIP_DISCARD (1U << 0) /* don't issue discard */ 267 #define XFS_EFI_ATTR_FORK (1U << 1) /* freeing attr fork block */ 268 #define XFS_EFI_BMBT_BLOCK (1U << 2) /* freeing bmap btree block */ 269 270 static inline void 271 xfs_free_extent_later( 272 struct xfs_trans *tp, 273 xfs_fsblock_t bno, 274 xfs_filblks_t len, 275 const struct xfs_owner_info *oinfo) 276 { 277 __xfs_free_extent_later(tp, bno, len, oinfo, false); 278 } 279 280 281 extern struct kmem_cache *xfs_extfree_item_cache; 282 283 int __init xfs_extfree_intent_init_cache(void); 284 void xfs_extfree_intent_destroy_cache(void); 285 286 #endif /* __XFS_ALLOC_H__ */ 287