10b61f8a4SDave Chinner // SPDX-License-Identifier: GPL-2.0 284be0ffcSDave Chinner /* 384be0ffcSDave Chinner * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 484be0ffcSDave Chinner * All Rights Reserved. 584be0ffcSDave Chinner */ 684be0ffcSDave Chinner #ifndef __XFS_INODE_FORK_H__ 784be0ffcSDave Chinner #define __XFS_INODE_FORK_H__ 884be0ffcSDave Chinner 984be0ffcSDave Chinner struct xfs_inode_log_item; 1084be0ffcSDave Chinner struct xfs_dinode; 1184be0ffcSDave Chinner 1284be0ffcSDave Chinner /* 1384be0ffcSDave Chinner * File incore extent information, present for each of data & attr forks. 1484be0ffcSDave Chinner */ 153ba738dfSChristoph Hellwig struct xfs_ifork { 163f8a4f1dSDave Chinner int64_t if_bytes; /* bytes in if_u1 */ 1784be0ffcSDave Chinner struct xfs_btree_block *if_broot; /* file's incore btree root */ 183f8a4f1dSDave Chinner unsigned int if_seq; /* fork mod counter */ 196bdcf26aSChristoph Hellwig int if_height; /* height of the extent tree */ 2084be0ffcSDave Chinner union { 216bdcf26aSChristoph Hellwig void *if_root; /* extent tree root */ 2284be0ffcSDave Chinner char *if_data; /* inline file data */ 2384be0ffcSDave Chinner } if_u1; 243f8a4f1dSDave Chinner short if_broot_bytes; /* bytes allocated for root */ 253f8a4f1dSDave Chinner unsigned char if_flags; /* per-fork flags */ 26f7e67b20SChristoph Hellwig int8_t if_format; /* format of this fork */ 27daf83964SChristoph Hellwig xfs_extnum_t if_nextents; /* # of extents in this fork */ 283ba738dfSChristoph Hellwig }; 2984be0ffcSDave Chinner 3084be0ffcSDave Chinner /* 3184be0ffcSDave Chinner * Per-fork incore inode flags. 3284be0ffcSDave Chinner */ 3384be0ffcSDave Chinner #define XFS_IFINLINE 0x01 /* Inline data is read in */ 3484be0ffcSDave Chinner #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ 3584be0ffcSDave Chinner #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ 3684be0ffcSDave Chinner 3784be0ffcSDave Chinner /* 38727e1acdSChandan Babu R * Worst-case increase in the fork extent count when we're adding a single 39727e1acdSChandan Babu R * extent to a fork and there's no possibility of splitting an existing mapping. 40727e1acdSChandan Babu R */ 41727e1acdSChandan Babu R #define XFS_IEXT_ADD_NOSPLIT_CNT (1) 42727e1acdSChandan Babu R 43727e1acdSChandan Babu R /* 4485ef08b5SChandan Babu R * Punching out an extent from the middle of an existing extent can cause the 4585ef08b5SChandan Babu R * extent count to increase by 1. 4685ef08b5SChandan Babu R * i.e. | Old extent | Hole | Old extent | 4785ef08b5SChandan Babu R */ 4885ef08b5SChandan Babu R #define XFS_IEXT_PUNCH_HOLE_CNT (1) 4985ef08b5SChandan Babu R 5085ef08b5SChandan Babu R /* 51*f5d92749SChandan Babu R * Directory entry addition can cause the following, 52*f5d92749SChandan Babu R * 1. Data block can be added/removed. 53*f5d92749SChandan Babu R * A new extent can cause extent count to increase by 1. 54*f5d92749SChandan Babu R * 2. Free disk block can be added/removed. 55*f5d92749SChandan Babu R * Same behaviour as described above for Data block. 56*f5d92749SChandan Babu R * 3. Dabtree blocks. 57*f5d92749SChandan Babu R * XFS_DA_NODE_MAXDEPTH blocks can be added. Each of these can be new 58*f5d92749SChandan Babu R * extents. Hence extent count can increase by XFS_DA_NODE_MAXDEPTH. 59*f5d92749SChandan Babu R */ 60*f5d92749SChandan Babu R #define XFS_IEXT_DIR_MANIP_CNT(mp) \ 61*f5d92749SChandan Babu R ((XFS_DA_NODE_MAXDEPTH + 1 + 1) * (mp)->m_dir_geo->fsbcount) 62*f5d92749SChandan Babu R 63*f5d92749SChandan Babu R /* 6484be0ffcSDave Chinner * Fork handling. 6584be0ffcSDave Chinner */ 6684be0ffcSDave Chinner 6784be0ffcSDave Chinner #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) 6884be0ffcSDave Chinner #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) 6984be0ffcSDave Chinner 7084be0ffcSDave Chinner #define XFS_IFORK_PTR(ip,w) \ 7184be0ffcSDave Chinner ((w) == XFS_DATA_FORK ? \ 7284be0ffcSDave Chinner &(ip)->i_df : \ 733993baebSDarrick J. Wong ((w) == XFS_ATTR_FORK ? \ 743993baebSDarrick J. Wong (ip)->i_afp : \ 753993baebSDarrick J. Wong (ip)->i_cowfp)) 7684be0ffcSDave Chinner #define XFS_IFORK_DSIZE(ip) \ 77e9e2eae8SChristoph Hellwig (XFS_IFORK_Q(ip) ? XFS_IFORK_BOFF(ip) : XFS_LITINO((ip)->i_mount)) 7884be0ffcSDave Chinner #define XFS_IFORK_ASIZE(ip) \ 79e9e2eae8SChristoph Hellwig (XFS_IFORK_Q(ip) ? XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : 0) 8084be0ffcSDave Chinner #define XFS_IFORK_SIZE(ip,w) \ 8184be0ffcSDave Chinner ((w) == XFS_DATA_FORK ? \ 8284be0ffcSDave Chinner XFS_IFORK_DSIZE(ip) : \ 833993baebSDarrick J. Wong ((w) == XFS_ATTR_FORK ? \ 843993baebSDarrick J. Wong XFS_IFORK_ASIZE(ip) : \ 853993baebSDarrick J. Wong 0)) 8684be0ffcSDave Chinner #define XFS_IFORK_MAXEXT(ip, w) \ 8784be0ffcSDave Chinner (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) 8884be0ffcSDave Chinner 89f7e67b20SChristoph Hellwig static inline bool xfs_ifork_has_extents(struct xfs_ifork *ifp) 90f7e67b20SChristoph Hellwig { 91f7e67b20SChristoph Hellwig return ifp->if_format == XFS_DINODE_FMT_EXTENTS || 92f7e67b20SChristoph Hellwig ifp->if_format == XFS_DINODE_FMT_BTREE; 93f7e67b20SChristoph Hellwig } 942fe4f928SDarrick J. Wong 95daf83964SChristoph Hellwig static inline xfs_extnum_t xfs_ifork_nextents(struct xfs_ifork *ifp) 96daf83964SChristoph Hellwig { 97daf83964SChristoph Hellwig if (!ifp) 98daf83964SChristoph Hellwig return 0; 99daf83964SChristoph Hellwig return ifp->if_nextents; 100daf83964SChristoph Hellwig } 101daf83964SChristoph Hellwig 102f7e67b20SChristoph Hellwig static inline int8_t xfs_ifork_format(struct xfs_ifork *ifp) 103f7e67b20SChristoph Hellwig { 104f7e67b20SChristoph Hellwig if (!ifp) 105f7e67b20SChristoph Hellwig return XFS_DINODE_FMT_EXTENTS; 106f7e67b20SChristoph Hellwig return ifp->if_format; 107f7e67b20SChristoph Hellwig } 108f7e67b20SChristoph Hellwig 1093993baebSDarrick J. Wong struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state); 1103993baebSDarrick J. Wong 1119229d18eSChristoph Hellwig int xfs_iformat_data_fork(struct xfs_inode *, struct xfs_dinode *); 1129229d18eSChristoph Hellwig int xfs_iformat_attr_fork(struct xfs_inode *, struct xfs_dinode *); 11378420281SDarrick J. Wong void xfs_iflush_fork(struct xfs_inode *, struct xfs_dinode *, 11484be0ffcSDave Chinner struct xfs_inode_log_item *, int); 115ef838512SChristoph Hellwig void xfs_idestroy_fork(struct xfs_ifork *ifp); 1163f8a4f1dSDave Chinner void xfs_idata_realloc(struct xfs_inode *ip, int64_t byte_diff, 1173f8a4f1dSDave Chinner int whichfork); 11884be0ffcSDave Chinner void xfs_iroot_realloc(struct xfs_inode *, int, int); 11984be0ffcSDave Chinner int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); 12084be0ffcSDave Chinner int xfs_iextents_copy(struct xfs_inode *, struct xfs_bmbt_rec *, 12184be0ffcSDave Chinner int); 1223f8a4f1dSDave Chinner void xfs_init_local_fork(struct xfs_inode *ip, int whichfork, 1233f8a4f1dSDave Chinner const void *data, int64_t size); 12484be0ffcSDave Chinner 1256bdcf26aSChristoph Hellwig xfs_extnum_t xfs_iext_count(struct xfs_ifork *ifp); 126b2b1712aSChristoph Hellwig void xfs_iext_insert(struct xfs_inode *, struct xfs_iext_cursor *cur, 1270254c2f2SChristoph Hellwig struct xfs_bmbt_irec *, int); 128b2b1712aSChristoph Hellwig void xfs_iext_remove(struct xfs_inode *, struct xfs_iext_cursor *, 129c38ccf59SChristoph Hellwig int); 13084be0ffcSDave Chinner void xfs_iext_destroy(struct xfs_ifork *); 13184be0ffcSDave Chinner 13293533c78SChristoph Hellwig bool xfs_iext_lookup_extent(struct xfs_inode *ip, 13393533c78SChristoph Hellwig struct xfs_ifork *ifp, xfs_fileoff_t bno, 134b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, 135b2b1712aSChristoph Hellwig struct xfs_bmbt_irec *gotp); 136dc56015fSChristoph Hellwig bool xfs_iext_lookup_extent_before(struct xfs_inode *ip, 137dc56015fSChristoph Hellwig struct xfs_ifork *ifp, xfs_fileoff_t *end, 138b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, 139b2b1712aSChristoph Hellwig struct xfs_bmbt_irec *gotp); 140b2b1712aSChristoph Hellwig bool xfs_iext_get_extent(struct xfs_ifork *ifp, 141b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, 14293533c78SChristoph Hellwig struct xfs_bmbt_irec *gotp); 143ca5d8e5bSChristoph Hellwig void xfs_iext_update_extent(struct xfs_inode *ip, int state, 144b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, 145b2b1712aSChristoph Hellwig struct xfs_bmbt_irec *gotp); 146b2b1712aSChristoph Hellwig 1476bdcf26aSChristoph Hellwig void xfs_iext_first(struct xfs_ifork *, struct xfs_iext_cursor *); 1486bdcf26aSChristoph Hellwig void xfs_iext_last(struct xfs_ifork *, struct xfs_iext_cursor *); 1496bdcf26aSChristoph Hellwig void xfs_iext_next(struct xfs_ifork *, struct xfs_iext_cursor *); 1506bdcf26aSChristoph Hellwig void xfs_iext_prev(struct xfs_ifork *, struct xfs_iext_cursor *); 151b2b1712aSChristoph Hellwig 152b2b1712aSChristoph Hellwig static inline bool xfs_iext_next_extent(struct xfs_ifork *ifp, 153b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 154b2b1712aSChristoph Hellwig { 155b2b1712aSChristoph Hellwig xfs_iext_next(ifp, cur); 156b2b1712aSChristoph Hellwig return xfs_iext_get_extent(ifp, cur, gotp); 157b2b1712aSChristoph Hellwig } 158b2b1712aSChristoph Hellwig 159b2b1712aSChristoph Hellwig static inline bool xfs_iext_prev_extent(struct xfs_ifork *ifp, 160b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 161b2b1712aSChristoph Hellwig { 162b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, cur); 163b2b1712aSChristoph Hellwig return xfs_iext_get_extent(ifp, cur, gotp); 164b2b1712aSChristoph Hellwig } 165b2b1712aSChristoph Hellwig 166b2b1712aSChristoph Hellwig /* 167b2b1712aSChristoph Hellwig * Return the extent after cur in gotp without updating the cursor. 168b2b1712aSChristoph Hellwig */ 169b2b1712aSChristoph Hellwig static inline bool xfs_iext_peek_next_extent(struct xfs_ifork *ifp, 170b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 171b2b1712aSChristoph Hellwig { 172b2b1712aSChristoph Hellwig struct xfs_iext_cursor ncur = *cur; 173b2b1712aSChristoph Hellwig 174b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &ncur); 175b2b1712aSChristoph Hellwig return xfs_iext_get_extent(ifp, &ncur, gotp); 176b2b1712aSChristoph Hellwig } 177b2b1712aSChristoph Hellwig 178b2b1712aSChristoph Hellwig /* 179b2b1712aSChristoph Hellwig * Return the extent before cur in gotp without updating the cursor. 180b2b1712aSChristoph Hellwig */ 181b2b1712aSChristoph Hellwig static inline bool xfs_iext_peek_prev_extent(struct xfs_ifork *ifp, 182b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 183b2b1712aSChristoph Hellwig { 184b2b1712aSChristoph Hellwig struct xfs_iext_cursor ncur = *cur; 185b2b1712aSChristoph Hellwig 186b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &ncur); 187b2b1712aSChristoph Hellwig return xfs_iext_get_extent(ifp, &ncur, gotp); 188b2b1712aSChristoph Hellwig } 189b2b1712aSChristoph Hellwig 190b2b1712aSChristoph Hellwig #define for_each_xfs_iext(ifp, ext, got) \ 191b2b1712aSChristoph Hellwig for (xfs_iext_first((ifp), (ext)); \ 192b2b1712aSChristoph Hellwig xfs_iext_get_extent((ifp), (ext), (got)); \ 193b2b1712aSChristoph Hellwig xfs_iext_next((ifp), (ext))) 19493533c78SChristoph Hellwig 19584be0ffcSDave Chinner extern struct kmem_zone *xfs_ifork_zone; 19684be0ffcSDave Chinner 1973993baebSDarrick J. Wong extern void xfs_ifork_init_cow(struct xfs_inode *ip); 1983993baebSDarrick J. Wong 1997c7ba218SChristoph Hellwig int xfs_ifork_verify_local_data(struct xfs_inode *ip); 2007c7ba218SChristoph Hellwig int xfs_ifork_verify_local_attr(struct xfs_inode *ip); 201b9b7e1dcSChandan Babu R int xfs_iext_count_may_overflow(struct xfs_inode *ip, int whichfork, 202b9b7e1dcSChandan Babu R int nr_to_add); 2039cfb9b47SDarrick J. Wong 20484be0ffcSDave Chinner #endif /* __XFS_INODE_FORK_H__ */ 205