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