1 /* 2 * Copyright (C) 2016 Oracle. All Rights Reserved. 3 * 4 * Author: Darrick J. Wong <darrick.wong@oracle.com> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 2 9 * of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it would be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. 19 */ 20 #ifndef __XFS_RMAP_H__ 21 #define __XFS_RMAP_H__ 22 23 static inline void 24 xfs_rmap_ag_owner( 25 struct xfs_owner_info *oi, 26 uint64_t owner) 27 { 28 oi->oi_owner = owner; 29 oi->oi_offset = 0; 30 oi->oi_flags = 0; 31 } 32 33 static inline void 34 xfs_rmap_ino_bmbt_owner( 35 struct xfs_owner_info *oi, 36 xfs_ino_t ino, 37 int whichfork) 38 { 39 oi->oi_owner = ino; 40 oi->oi_offset = 0; 41 oi->oi_flags = XFS_OWNER_INFO_BMBT_BLOCK; 42 if (whichfork == XFS_ATTR_FORK) 43 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 44 } 45 46 static inline void 47 xfs_rmap_ino_owner( 48 struct xfs_owner_info *oi, 49 xfs_ino_t ino, 50 int whichfork, 51 xfs_fileoff_t offset) 52 { 53 oi->oi_owner = ino; 54 oi->oi_offset = offset; 55 oi->oi_flags = 0; 56 if (whichfork == XFS_ATTR_FORK) 57 oi->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 58 } 59 60 static inline void 61 xfs_rmap_skip_owner_update( 62 struct xfs_owner_info *oi) 63 { 64 oi->oi_owner = XFS_RMAP_OWN_UNKNOWN; 65 } 66 67 /* Reverse mapping functions. */ 68 69 struct xfs_buf; 70 71 static inline __u64 72 xfs_rmap_irec_offset_pack( 73 const struct xfs_rmap_irec *irec) 74 { 75 __u64 x; 76 77 x = XFS_RMAP_OFF(irec->rm_offset); 78 if (irec->rm_flags & XFS_RMAP_ATTR_FORK) 79 x |= XFS_RMAP_OFF_ATTR_FORK; 80 if (irec->rm_flags & XFS_RMAP_BMBT_BLOCK) 81 x |= XFS_RMAP_OFF_BMBT_BLOCK; 82 if (irec->rm_flags & XFS_RMAP_UNWRITTEN) 83 x |= XFS_RMAP_OFF_UNWRITTEN; 84 return x; 85 } 86 87 static inline int 88 xfs_rmap_irec_offset_unpack( 89 __u64 offset, 90 struct xfs_rmap_irec *irec) 91 { 92 if (offset & ~(XFS_RMAP_OFF_MASK | XFS_RMAP_OFF_FLAGS)) 93 return -EFSCORRUPTED; 94 irec->rm_offset = XFS_RMAP_OFF(offset); 95 if (offset & XFS_RMAP_OFF_ATTR_FORK) 96 irec->rm_flags |= XFS_RMAP_ATTR_FORK; 97 if (offset & XFS_RMAP_OFF_BMBT_BLOCK) 98 irec->rm_flags |= XFS_RMAP_BMBT_BLOCK; 99 if (offset & XFS_RMAP_OFF_UNWRITTEN) 100 irec->rm_flags |= XFS_RMAP_UNWRITTEN; 101 return 0; 102 } 103 104 static inline void 105 xfs_owner_info_unpack( 106 struct xfs_owner_info *oinfo, 107 uint64_t *owner, 108 uint64_t *offset, 109 unsigned int *flags) 110 { 111 unsigned int r = 0; 112 113 *owner = oinfo->oi_owner; 114 *offset = oinfo->oi_offset; 115 if (oinfo->oi_flags & XFS_OWNER_INFO_ATTR_FORK) 116 r |= XFS_RMAP_ATTR_FORK; 117 if (oinfo->oi_flags & XFS_OWNER_INFO_BMBT_BLOCK) 118 r |= XFS_RMAP_BMBT_BLOCK; 119 *flags = r; 120 } 121 122 static inline void 123 xfs_owner_info_pack( 124 struct xfs_owner_info *oinfo, 125 uint64_t owner, 126 uint64_t offset, 127 unsigned int flags) 128 { 129 oinfo->oi_owner = owner; 130 oinfo->oi_offset = XFS_RMAP_OFF(offset); 131 oinfo->oi_flags = 0; 132 if (flags & XFS_RMAP_ATTR_FORK) 133 oinfo->oi_flags |= XFS_OWNER_INFO_ATTR_FORK; 134 if (flags & XFS_RMAP_BMBT_BLOCK) 135 oinfo->oi_flags |= XFS_OWNER_INFO_BMBT_BLOCK; 136 } 137 138 int xfs_rmap_alloc(struct xfs_trans *tp, struct xfs_buf *agbp, 139 xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len, 140 struct xfs_owner_info *oinfo); 141 int xfs_rmap_free(struct xfs_trans *tp, struct xfs_buf *agbp, 142 xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len, 143 struct xfs_owner_info *oinfo); 144 145 int xfs_rmap_lookup_le(struct xfs_btree_cur *cur, xfs_agblock_t bno, 146 xfs_extlen_t len, uint64_t owner, uint64_t offset, 147 unsigned int flags, int *stat); 148 int xfs_rmap_lookup_eq(struct xfs_btree_cur *cur, xfs_agblock_t bno, 149 xfs_extlen_t len, uint64_t owner, uint64_t offset, 150 unsigned int flags, int *stat); 151 int xfs_rmap_insert(struct xfs_btree_cur *rcur, xfs_agblock_t agbno, 152 xfs_extlen_t len, uint64_t owner, uint64_t offset, 153 unsigned int flags); 154 int xfs_rmap_get_rec(struct xfs_btree_cur *cur, struct xfs_rmap_irec *irec, 155 int *stat); 156 157 typedef int (*xfs_rmap_query_range_fn)( 158 struct xfs_btree_cur *cur, 159 struct xfs_rmap_irec *rec, 160 void *priv); 161 162 int xfs_rmap_query_range(struct xfs_btree_cur *cur, 163 struct xfs_rmap_irec *low_rec, struct xfs_rmap_irec *high_rec, 164 xfs_rmap_query_range_fn fn, void *priv); 165 int xfs_rmap_query_all(struct xfs_btree_cur *cur, xfs_rmap_query_range_fn fn, 166 void *priv); 167 168 enum xfs_rmap_intent_type { 169 XFS_RMAP_MAP, 170 XFS_RMAP_MAP_SHARED, 171 XFS_RMAP_UNMAP, 172 XFS_RMAP_UNMAP_SHARED, 173 XFS_RMAP_CONVERT, 174 XFS_RMAP_CONVERT_SHARED, 175 XFS_RMAP_ALLOC, 176 XFS_RMAP_FREE, 177 }; 178 179 struct xfs_rmap_intent { 180 struct list_head ri_list; 181 enum xfs_rmap_intent_type ri_type; 182 uint64_t ri_owner; 183 int ri_whichfork; 184 struct xfs_bmbt_irec ri_bmap; 185 }; 186 187 /* functions for updating the rmapbt based on bmbt map/unmap operations */ 188 int xfs_rmap_map_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, 189 struct xfs_inode *ip, int whichfork, 190 struct xfs_bmbt_irec *imap); 191 int xfs_rmap_unmap_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, 192 struct xfs_inode *ip, int whichfork, 193 struct xfs_bmbt_irec *imap); 194 int xfs_rmap_convert_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, 195 struct xfs_inode *ip, int whichfork, 196 struct xfs_bmbt_irec *imap); 197 int xfs_rmap_alloc_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, 198 xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len, 199 uint64_t owner); 200 int xfs_rmap_free_extent(struct xfs_mount *mp, struct xfs_defer_ops *dfops, 201 xfs_agnumber_t agno, xfs_agblock_t bno, xfs_extlen_t len, 202 uint64_t owner); 203 204 void xfs_rmap_finish_one_cleanup(struct xfs_trans *tp, 205 struct xfs_btree_cur *rcur, int error); 206 int xfs_rmap_finish_one(struct xfs_trans *tp, enum xfs_rmap_intent_type type, 207 uint64_t owner, int whichfork, xfs_fileoff_t startoff, 208 xfs_fsblock_t startblock, xfs_filblks_t blockcount, 209 xfs_exntst_t state, struct xfs_btree_cur **pcur); 210 211 int xfs_rmap_find_left_neighbor(struct xfs_btree_cur *cur, xfs_agblock_t bno, 212 uint64_t owner, uint64_t offset, unsigned int flags, 213 struct xfs_rmap_irec *irec, int *stat); 214 int xfs_rmap_lookup_le_range(struct xfs_btree_cur *cur, xfs_agblock_t bno, 215 uint64_t owner, uint64_t offset, unsigned int flags, 216 struct xfs_rmap_irec *irec, int *stat); 217 int xfs_rmap_compare(const struct xfs_rmap_irec *a, 218 const struct xfs_rmap_irec *b); 219 union xfs_btree_rec; 220 int xfs_rmap_btrec_to_irec(union xfs_btree_rec *rec, 221 struct xfs_rmap_irec *irec); 222 223 #endif /* __XFS_RMAP_H__ */ 224