1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2016 Oracle. All Rights Reserved. 4 * Author: Darrick J. Wong <darrick.wong@oracle.com> 5 */ 6 #ifndef __XFS_RMAP_H__ 7 #define __XFS_RMAP_H__ 8 9 struct xfs_perag; 10 11 static inline void 12 xfs_rmap_ino_bmbt_owner( 13 struct xfs_owner_info *oi, 14 xfs_ino_t ino, 15 int whichfork) 16 { 17 oi->oi_owner = ino; 18 oi->oi_offset = 0; 19 oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK; 20 if (whichfork == XFS_ATTR_FORK) 21 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 22 } 23 24 static inline void 25 xfs_rmap_ino_owner( 26 struct xfs_owner_info *oi, 27 xfs_ino_t ino, 28 int whichfork, 29 xfs_fileoff_t offset) 30 { 31 oi->oi_owner = ino; 32 oi->oi_offset = offset; 33 oi->oi_flags = 0; 34 if (whichfork == XFS_ATTR_FORK) 35 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 36 } 37 38 static inline bool 39 xfs_rmap_should_skip_owner_update( 40 const struct xfs_owner_info *oi) 41 { 42 return oi->oi_owner == XFS_RMAP_OWN_NULL; 43 } 44 45 /* Reverse mapping functions. */ 46 47 struct xfs_buf; 48 49 static inline __u64 50 xfs_rmap_irec_offset_pack( 51 const struct xfs_rmap_irec *irec) 52 { 53 __u64 x; 54 55 x = XFS_RMAP_OFF(irec->rm_offset); 56 if (irec->rm_flags & XFS_RMAP_ATTR_FORK) 57 x |= XFS_RMAP_OFF_ATTR_FORK; 58 if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK) 59 x |= XFS_RMAP_OFF_BMBT_BLOCK; 60 if (irec->rm_flags & XFS_RMAP_UNWRITTEN) 61 x |= XFS_RMAP_OFF_UNWRITTEN; 62 return x; 63 } 64 65 static inline int 66 xfs_rmap_irec_offset_unpack( 67 __u64 offset, 68 struct xfs_rmap_irec *irec) 69 { 70 if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS)) 71 return -EFSCORRUPTED; 72 irec->rm_offset = XFS_RMAP_OFF(offset); 73 irec->rm_flags = 0; 74 if (offset & XFS_RMAP_OFF_ATTR_FORK) 75 irec->rm_flags |= XFS_RMAP_ATTR_FORK; 76 if (offset & XFS_RMAP_OFF_BMBT_BLOCK) 77 irec->rm_flags |= XFS_RMAP_BMBT_BLOCK; 78 if (offset & XFS_RMAP_OFF_UNWRITTEN) 79 irec->rm_flags |= XFS_RMAP_UNWRITTEN; 80 return 0; 81 } 82 83 static inline void 84 xfs_owner_info_unpack( 85 const struct xfs_owner_info *oinfo, 86 uint64_t *owner, 87 uint64_t *offset, 88 unsigned int *flags) 89 { 90 unsigned int r = 0; 91 92 *owner = oinfo->oi_owner; 93 *offset = oinfo->oi_offset; 94 if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK) 95 r |= XFS_RMAP_ATTR_FORK; 96 if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK) 97 r |= XFS_RMAP_BMBT_BLOCK; 98 *flags = r; 99 } 100 101 static inline void 102 xfs_owner_info_pack( 103 struct xfs_owner_info *oinfo, 104 uint64_t owner, 105 uint64_t offset, 106 unsigned int flags) 107 { 108 oinfo->oi_owner = owner; 109 oinfo->oi_offset = XFS_RMAP_OFF(offset); 110 oinfo->oi_flags = 0; 111 if (flags & XFS_RMAP_ATTR_FORK) 112 oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 113 if (flags & XFS_RMAP_BMBT_BLOCK) 114 oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK; 115 } 116 117 int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp, 118 struct xfs_perag *pag, xfs_agblock_t bno, xfs_extlen_t len, 119 const struct xfs_owner_info *oinfo); 120 int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp, 121 struct xfs_perag *pag, xfs_agblock_t bno, xfs_extlen_t len, 122 const struct xfs_owner_info *oinfo); 123 124 int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno, 125 uint64_t owner, uint64_t offset, unsigned int flags, 126 struct xfs_rmap_irec *irec, int *stat); 127 int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno, 128 xfs_extlen_t len, uint64_t owner, uint64_t offset, 129 unsigned int flags, int *stat); 130 int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno, 131 xfs_extlen_t len, uint64_t owner, uint64_t offset, 132 unsigned int flags); 133 int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec, 134 int *stat); 135 136 typedef int (*xfs_rmap_query_range_fn)( 137 struct xfs_btree_cur *cur, 138 const struct xfs_rmap_irec *rec, 139 void *priv); 140 141 int xfs_rmap_query_range(struct xfs_btree_cur *cur, 142 const struct xfs_rmap_irec *low_rec, 143 const struct xfs_rmap_irec *high_rec, 144 xfs_rmap_query_range_fn fn, void *priv); 145 int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn, 146 void *priv); 147 148 enum xfs_rmap_intent_type { 149 XFS_RMAP_MAP, 150 XFS_RMAP_MAP_SHARED, 151 XFS_RMAP_UNMAP, 152 XFS_RMAP_UNMAP_SHARED, 153 XFS_RMAP_CONVERT, 154 XFS_RMAP_CONVERT_SHARED, 155 XFS_RMAP_ALLOC, 156 XFS_RMAP_FREE, 157 }; 158 159 struct xfs_rmap_intent { 160 struct list_head ri_list; 161 enum xfs_rmap_intent_type ri_type; 162 int ri_whichfork; 163 uint64_t ri_owner; 164 struct xfs_bmbt_irec ri_bmap; 165 }; 166 167 /* functions for updating the rmapbt based on bmbt map/unmap operations */ 168 void xfs_rmap_map_extent(struct xfs_trans *tp, struct xfs_inode *ip, 169 int whichfork, struct xfs_bmbt_irec *imap); 170 void xfs_rmap_unmap_extent(struct xfs_trans *tp, struct xfs_inode *ip, 171 int whichfork, struct xfs_bmbt_irec *imap); 172 void xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_trans *tp, 173 struct xfs_inode *ip, int whichfork, 174 struct xfs_bmbt_irec *imap); 175 void xfs_rmap_alloc_extent(struct xfs_trans *tp, xfs_agnumber_t agno, 176 xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner); 177 void xfs_rmap_free_extent(struct xfs_trans *tp, xfs_agnumber_t agno, 178 xfs_agblock_t bno, xfs_extlen_t len, uint64_t owner); 179 180 void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp, 181 struct xfs_btree_cur *rcur, int error); 182 int xfs_rmap_finish_one(struct xfs_trans *tp, struct xfs_rmap_intent *ri, 183 struct xfs_btree_cur **pcur); 184 185 int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno, 186 uint64_t owner, uint64_t offset, unsigned int flags, 187 struct xfs_rmap_irec *irec, int *stat); 188 int xfs_rmap_compare(const struct xfs_rmap_irec *a, 189 const struct xfs_rmap_irec *b); 190 union xfs_btree_rec; 191 int xfs_rmap_btrec_to_irec(const union xfs_btree_rec *rec, 192 struct xfs_rmap_irec *irec); 193 int xfs_rmap_has_record(struct xfs_btree_cur *cur, xfs_agblock_t bno, 194 xfs_extlen_t len, bool *exists); 195 int xfs_rmap_record_exists(struct xfs_btree_cur *cur, xfs_agblock_t bno, 196 xfs_extlen_t len, const struct xfs_owner_info *oinfo, 197 bool *has_rmap); 198 int xfs_rmap_has_other_keys(struct xfs_btree_cur *cur, xfs_agblock_t bno, 199 xfs_extlen_t len, const struct xfs_owner_info *oinfo, 200 bool *has_rmap); 201 int xfs_rmap_map_raw(struct xfs_btree_cur *cur, struct xfs_rmap_irec *rmap); 202 203 extern const struct xfs_owner_info XFS_RMAP_OINFO_SKIP_UPDATE; 204 extern const struct xfs_owner_info XFS_RMAP_OINFO_ANY_OWNER; 205 extern const struct xfs_owner_info XFS_RMAP_OINFO_FS; 206 extern const struct xfs_owner_info XFS_RMAP_OINFO_LOG; 207 extern const struct xfs_owner_info XFS_RMAP_OINFO_AG; 208 extern const struct xfs_owner_info XFS_RMAP_OINFO_INOBT; 209 extern const struct xfs_owner_info XFS_RMAP_OINFO_INODES; 210 extern const struct xfs_owner_info XFS_RMAP_OINFO_REFC; 211 extern const struct xfs_owner_info XFS_RMAP_OINFO_COW; 212 213 extern struct kmem_cache *xfs_rmap_intent_cache; 214 215 int __init xfs_rmap_intent_init_cache(void); 216 void xfs_rmap_intent_destroy_cache(void); 217 218 #endif /* __XFS_RMAP_H__ */ 219