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 int8_t if_format; /* format of this fork */ 27 xfs_extnum_t if_nextents; /* # of extents in this fork */ 28 }; 29 30 /* 31 * Per-fork incore inode flags. 32 */ 33 #define XFS_IFINLINE 0x01 /* Inline data is read in */ 34 #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ 35 #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ 36 37 /* 38 * Fork handling. 39 */ 40 41 #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) 42 #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) 43 44 #define XFS_IFORK_PTR(ip,w) \ 45 ((w) == XFS_DATA_FORK ? \ 46 &(ip)->i_df : \ 47 ((w) == XFS_ATTR_FORK ? \ 48 (ip)->i_afp : \ 49 (ip)->i_cowfp)) 50 #define XFS_IFORK_DSIZE(ip) \ 51 (XFS_IFORK_Q(ip) ? XFS_IFORK_BOFF(ip) : XFS_LITINO((ip)->i_mount)) 52 #define XFS_IFORK_ASIZE(ip) \ 53 (XFS_IFORK_Q(ip) ? XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : 0) 54 #define XFS_IFORK_SIZE(ip,w) \ 55 ((w) == XFS_DATA_FORK ? \ 56 XFS_IFORK_DSIZE(ip) : \ 57 ((w) == XFS_ATTR_FORK ? \ 58 XFS_IFORK_ASIZE(ip) : \ 59 0)) 60 #define XFS_IFORK_MAXEXT(ip, w) \ 61 (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) 62 63 static inline bool xfs_ifork_has_extents(struct xfs_ifork *ifp) 64 { 65 return ifp->if_format == XFS_DINODE_FMT_EXTENTS || 66 ifp->if_format == XFS_DINODE_FMT_BTREE; 67 } 68 69 static inline xfs_extnum_t xfs_ifork_nextents(struct xfs_ifork *ifp) 70 { 71 if (!ifp) 72 return 0; 73 return ifp->if_nextents; 74 } 75 76 static inline int8_t xfs_ifork_format(struct xfs_ifork *ifp) 77 { 78 if (!ifp) 79 return XFS_DINODE_FMT_EXTENTS; 80 return ifp->if_format; 81 } 82 83 struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state); 84 85 int xfs_iformat_data_fork(struct xfs_inode *, struct xfs_dinode *); 86 int xfs_iformat_attr_fork(struct xfs_inode *, struct xfs_dinode *); 87 void xfs_iflush_fork(struct xfs_inode *, struct xfs_dinode *, 88 struct xfs_inode_log_item *, int); 89 void xfs_idestroy_fork(struct xfs_ifork *ifp); 90 void xfs_idata_realloc(struct xfs_inode *ip, int64_t byte_diff, 91 int whichfork); 92 void xfs_iroot_realloc(struct xfs_inode *, int, int); 93 int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); 94 int xfs_iextents_copy(struct xfs_inode *, struct xfs_bmbt_rec *, 95 int); 96 void xfs_init_local_fork(struct xfs_inode *ip, int whichfork, 97 const void *data, int64_t size); 98 99 xfs_extnum_t xfs_iext_count(struct xfs_ifork *ifp); 100 void xfs_iext_insert(struct xfs_inode *, struct xfs_iext_cursor *cur, 101 struct xfs_bmbt_irec *, int); 102 void xfs_iext_remove(struct xfs_inode *, struct xfs_iext_cursor *, 103 int); 104 void xfs_iext_destroy(struct xfs_ifork *); 105 106 bool xfs_iext_lookup_extent(struct xfs_inode *ip, 107 struct xfs_ifork *ifp, xfs_fileoff_t bno, 108 struct xfs_iext_cursor *cur, 109 struct xfs_bmbt_irec *gotp); 110 bool xfs_iext_lookup_extent_before(struct xfs_inode *ip, 111 struct xfs_ifork *ifp, xfs_fileoff_t *end, 112 struct xfs_iext_cursor *cur, 113 struct xfs_bmbt_irec *gotp); 114 bool xfs_iext_get_extent(struct xfs_ifork *ifp, 115 struct xfs_iext_cursor *cur, 116 struct xfs_bmbt_irec *gotp); 117 void xfs_iext_update_extent(struct xfs_inode *ip, int state, 118 struct xfs_iext_cursor *cur, 119 struct xfs_bmbt_irec *gotp); 120 121 void xfs_iext_first(struct xfs_ifork *, struct xfs_iext_cursor *); 122 void xfs_iext_last(struct xfs_ifork *, struct xfs_iext_cursor *); 123 void xfs_iext_next(struct xfs_ifork *, struct xfs_iext_cursor *); 124 void xfs_iext_prev(struct xfs_ifork *, struct xfs_iext_cursor *); 125 126 static inline bool xfs_iext_next_extent(struct xfs_ifork *ifp, 127 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 128 { 129 xfs_iext_next(ifp, cur); 130 return xfs_iext_get_extent(ifp, cur, gotp); 131 } 132 133 static inline bool xfs_iext_prev_extent(struct xfs_ifork *ifp, 134 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 135 { 136 xfs_iext_prev(ifp, cur); 137 return xfs_iext_get_extent(ifp, cur, gotp); 138 } 139 140 /* 141 * Return the extent after cur in gotp without updating the cursor. 142 */ 143 static inline bool xfs_iext_peek_next_extent(struct xfs_ifork *ifp, 144 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 145 { 146 struct xfs_iext_cursor ncur = *cur; 147 148 xfs_iext_next(ifp, &ncur); 149 return xfs_iext_get_extent(ifp, &ncur, gotp); 150 } 151 152 /* 153 * Return the extent before cur in gotp without updating the cursor. 154 */ 155 static inline bool xfs_iext_peek_prev_extent(struct xfs_ifork *ifp, 156 struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 157 { 158 struct xfs_iext_cursor ncur = *cur; 159 160 xfs_iext_prev(ifp, &ncur); 161 return xfs_iext_get_extent(ifp, &ncur, gotp); 162 } 163 164 #define for_each_xfs_iext(ifp, ext, got) \ 165 for (xfs_iext_first((ifp), (ext)); \ 166 xfs_iext_get_extent((ifp), (ext), (got)); \ 167 xfs_iext_next((ifp), (ext))) 168 169 extern struct kmem_zone *xfs_ifork_zone; 170 171 extern void xfs_ifork_init_cow(struct xfs_inode *ip); 172 173 int xfs_ifork_verify_local_data(struct xfs_inode *ip); 174 int xfs_ifork_verify_local_attr(struct xfs_inode *ip); 175 176 #endif /* __XFS_INODE_FORK_H__ */ 177