1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #ifndef __XFS_INODE_FORK_H__ 7 #define __XFS_INODE_FORK_H__ 8 9 struct xfs_inode_log_item; 10 struct xfs_dinode; 11 12 /* 13 * File incore extent information, present for each of data & attr forks. 14 */ 15 struct xfs_ifork { 16 int64_t if_bytes; /* bytes in if_u1 */ 17 struct xfs_btree_block *if_broot; /* file's incore btree root */ 18 unsigned int if_seq; /* fork mod counter */ 19 int if_height; /* height of the extent tree */ 20 union { 21 void *if_root; /* extent tree root */ 22 char *if_data; /* inline file data */ 23 } if_u1; 24 short if_broot_bytes; /* bytes allocated for root */ 25 unsigned char if_flags; /* per-fork flags */ 26 }; 27 28 /* 29 * Per-fork incore inode flags. 30 */ 31 #define XFS_IFINLINE 0x01 /* Inline data is read in */ 32 #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ 33 #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ 34 35 /* 36 * Fork handling. 37 */ 38 39 #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) 40 #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) 41 42 #define XFS_IFORK_PTR(ip,w) \ 43 ((w) == XFS_DATA_FORK ? \ 44 &(ip)->i_df : \ 45 ((w) == XFS_ATTR_FORK ? \ 46 (ip)->i_afp : \ 47 (ip)->i_cowfp)) 48 #define XFS_IFORK_DSIZE(ip) \ 49 (XFS_IFORK_Q(ip) ? XFS_IFORK_BOFF(ip) : XFS_LITINO((ip)->i_mount)) 50 #define XFS_IFORK_ASIZE(ip) \ 51 (XFS_IFORK_Q(ip) ? XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : 0) 52 #define XFS_IFORK_SIZE(ip,w) \ 53 ((w) == XFS_DATA_FORK ? \ 54 XFS_IFORK_DSIZE(ip) : \ 55 ((w) == XFS_ATTR_FORK ? \ 56 XFS_IFORK_ASIZE(ip) : \ 57 0)) 58 #define XFS_IFORK_FORMAT(ip,w) \ 59 ((w) == XFS_DATA_FORK ? \ 60 (ip)->i_d.di_format : \ 61 ((w) == XFS_ATTR_FORK ? \ 62 (ip)->i_d.di_aformat : \ 63 (ip)->i_cformat)) 64 #define XFS_IFORK_FMT_SET(ip,w,n) \ 65 ((w) == XFS_DATA_FORK ? \ 66 ((ip)->i_d.di_format = (n)) : \ 67 ((w) == XFS_ATTR_FORK ? \ 68 ((ip)->i_d.di_aformat = (n)) : \ 69 ((ip)->i_cformat = (n)))) 70 #define XFS_IFORK_NEXTENTS(ip,w) \ 71 ((w) == XFS_DATA_FORK ? \ 72 (ip)->i_d.di_nextents : \ 73 ((w) == XFS_ATTR_FORK ? \ 74 (ip)->i_d.di_anextents : \ 75 (ip)->i_cnextents)) 76 #define XFS_IFORK_NEXT_SET(ip,w,n) \ 77 ((w) == XFS_DATA_FORK ? \ 78 ((ip)->i_d.di_nextents = (n)) : \ 79 ((w) == XFS_ATTR_FORK ? \ 80 ((ip)->i_d.di_anextents = (n)) : \ 81 ((ip)->i_cnextents = (n)))) 82 #define XFS_IFORK_MAXEXT(ip, w) \ 83 (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) 84 85 #define xfs_ifork_has_extents(ip, w) \ 86 (XFS_IFORK_FORMAT((ip), (w)) == XFS_DINODE_FMT_EXTENTS || \ 87 XFS_IFORK_FORMAT((ip), (w)) == XFS_DINODE_FMT_BTREE) 88 89 struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state); 90 91 int xfs_iformat_fork(struct xfs_inode *, struct xfs_dinode *); 92 void xfs_iflush_fork(struct xfs_inode *, struct xfs_dinode *, 93 struct xfs_inode_log_item *, int); 94 void xfs_idestroy_fork(struct xfs_inode *, int); 95 void xfs_idata_realloc(struct xfs_inode *ip, int64_t byte_diff, 96 int whichfork); 97 void xfs_iroot_realloc(struct xfs_inode *, int, int); 98 int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); 99 int xfs_iextents_copy(struct xfs_inode *, struct xfs_bmbt_rec *, 100 int); 101 void xfs_init_local_fork(struct xfs_inode *ip, int whichfork, 102 const void *data, int64_t size); 103 104 xfs_extnum_t xfs_iext_count(struct xfs_ifork *ifp); 105 void xfs_iext_insert(struct xfs_inode *, struct xfs_iext_cursor *cur, 106 struct xfs_bmbt_irec *, int); 107 void xfs_iext_remove(struct xfs_inode *, struct xfs_iext_cursor *, 108 int); 109 void xfs_iext_destroy(struct xfs_ifork *); 110 111 bool xfs_iext_lookup_extent(struct xfs_inode *ip, 112 struct xfs_ifork *ifp, xfs_fileoff_t bno, 113 struct xfs_iext_cursor *cur, 114 struct xfs_bmbt_irec *gotp); 115 bool xfs_iext_lookup_extent_before(struct xfs_inode *ip, 116 struct xfs_ifork *ifp, xfs_fileoff_t *end, 117 struct xfs_iext_cursor *cur, 118 struct xfs_bmbt_irec *gotp); 119 bool xfs_iext_get_extent(struct xfs_ifork *ifp, 120 struct xfs_iext_cursor *cur, 121 struct xfs_bmbt_irec *gotp); 122 void xfs_iext_update_extent(struct xfs_inode *ip, int state, 123 struct xfs_iext_cursor *cur, 124 struct xfs_bmbt_irec *gotp); 125 126 void xfs_iext_first(struct xfs_ifork *, struct xfs_iext_cursor *); 127 void xfs_iext_last(struct xfs_ifork *, struct xfs_iext_cursor *); 128 void xfs_iext_next(struct xfs_ifork *, struct xfs_iext_cursor *); 129 void xfs_iext_prev(struct xfs_ifork *, struct xfs_iext_cursor *); 130 131 static inline bool xfs_iext_next_extent(struct xfs_ifork *ifp, 132 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 133 { 134 xfs_iext_next(ifp, cur); 135 return xfs_iext_get_extent(ifp, cur, gotp); 136 } 137 138 static inline bool xfs_iext_prev_extent(struct xfs_ifork *ifp, 139 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 140 { 141 xfs_iext_prev(ifp, cur); 142 return xfs_iext_get_extent(ifp, cur, gotp); 143 } 144 145 /* 146 * Return the extent after cur in gotp without updating the cursor. 147 */ 148 static inline bool xfs_iext_peek_next_extent(struct xfs_ifork *ifp, 149 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 150 { 151 struct xfs_iext_cursor ncur = *cur; 152 153 xfs_iext_next(ifp, &ncur); 154 return xfs_iext_get_extent(ifp, &ncur, gotp); 155 } 156 157 /* 158 * Return the extent before cur in gotp without updating the cursor. 159 */ 160 static inline bool xfs_iext_peek_prev_extent(struct xfs_ifork *ifp, 161 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 162 { 163 struct xfs_iext_cursor ncur = *cur; 164 165 xfs_iext_prev(ifp, &ncur); 166 return xfs_iext_get_extent(ifp, &ncur, gotp); 167 } 168 169 #define for_each_xfs_iext(ifp, ext, got) \ 170 for (xfs_iext_first((ifp), (ext)); \ 171 xfs_iext_get_extent((ifp), (ext), (got)); \ 172 xfs_iext_next((ifp), (ext))) 173 174 extern struct kmem_zone *xfs_ifork_zone; 175 176 extern void xfs_ifork_init_cow(struct xfs_inode *ip); 177 178 typedef xfs_failaddr_t (*xfs_ifork_verifier_t)(struct xfs_inode *); 179 180 struct xfs_ifork_ops { 181 xfs_ifork_verifier_t verify_symlink; 182 xfs_ifork_verifier_t verify_dir; 183 xfs_ifork_verifier_t verify_attr; 184 }; 185 extern struct xfs_ifork_ops xfs_default_ifork_ops; 186 187 xfs_failaddr_t xfs_ifork_verify_data(struct xfs_inode *ip, 188 struct xfs_ifork_ops *ops); 189 xfs_failaddr_t xfs_ifork_verify_attr(struct xfs_inode *ip, 190 struct xfs_ifork_ops *ops); 191 192 #endif /* __XFS_INODE_FORK_H__ */ 193