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 /* 51f5d92749SChandan Babu R * Directory entry addition can cause the following, 52f5d92749SChandan Babu R * 1. Data block can be added/removed. 53f5d92749SChandan Babu R * A new extent can cause extent count to increase by 1. 54f5d92749SChandan Babu R * 2. Free disk block can be added/removed. 55f5d92749SChandan Babu R * Same behaviour as described above for Data block. 56f5d92749SChandan Babu R * 3. Dabtree blocks. 57f5d92749SChandan Babu R * XFS_DA_NODE_MAXDEPTH blocks can be added. Each of these can be new 58f5d92749SChandan Babu R * extents. Hence extent count can increase by XFS_DA_NODE_MAXDEPTH. 59f5d92749SChandan Babu R */ 60f5d92749SChandan Babu R #define XFS_IEXT_DIR_MANIP_CNT(mp) \ 61f5d92749SChandan Babu R ((XFS_DA_NODE_MAXDEPTH + 1 + 1) * (mp)->m_dir_geo->fsbcount) 62f5d92749SChandan Babu R 63f5d92749SChandan Babu R /* 643a19bb14SChandan Babu R * Adding/removing an xattr can cause XFS_DA_NODE_MAXDEPTH extents to 653a19bb14SChandan Babu R * be added. One extra extent for dabtree in case a local attr is 663a19bb14SChandan Babu R * large enough to cause a double split. It can also cause extent 673a19bb14SChandan Babu R * count to increase proportional to the size of a remote xattr's 683a19bb14SChandan Babu R * value. 693a19bb14SChandan Babu R */ 703a19bb14SChandan Babu R #define XFS_IEXT_ATTR_MANIP_CNT(rmt_blks) \ 713a19bb14SChandan Babu R (XFS_DA_NODE_MAXDEPTH + max(1, rmt_blks)) 723a19bb14SChandan Babu R 733a19bb14SChandan Babu R /* 74c442f308SChandan Babu R * A write to a sub-interval of an existing unwritten extent causes the original 75c442f308SChandan Babu R * extent to be split into 3 extents 76c442f308SChandan Babu R * i.e. | Unwritten | Real | Unwritten | 77c442f308SChandan Babu R * Hence extent count can increase by 2. 78c442f308SChandan Babu R */ 79c442f308SChandan Babu R #define XFS_IEXT_WRITE_UNWRITTEN_CNT (2) 80c442f308SChandan Babu R 81c442f308SChandan Babu R 82c442f308SChandan Babu R /* 835f1d5bbfSChandan Babu R * Moving an extent to data fork can cause a sub-interval of an existing extent 845f1d5bbfSChandan Babu R * to be unmapped. This will increase extent count by 1. Mapping in the new 855f1d5bbfSChandan Babu R * extent can increase the extent count by 1 again i.e. 865f1d5bbfSChandan Babu R * | Old extent | New extent | Old extent | 875f1d5bbfSChandan Babu R * Hence number of extents increases by 2. 885f1d5bbfSChandan Babu R */ 895f1d5bbfSChandan Babu R #define XFS_IEXT_REFLINK_END_COW_CNT (2) 905f1d5bbfSChandan Babu R 915f1d5bbfSChandan Babu R /* 92*bcc561f2SChandan Babu R * Removing an initial range of source/donor file's extent and adding a new 93*bcc561f2SChandan Babu R * extent (from donor/source file) in its place will cause extent count to 94*bcc561f2SChandan Babu R * increase by 1. 95*bcc561f2SChandan Babu R */ 96*bcc561f2SChandan Babu R #define XFS_IEXT_SWAP_RMAP_CNT (1) 97*bcc561f2SChandan Babu R 98*bcc561f2SChandan Babu R /* 9984be0ffcSDave Chinner * Fork handling. 10084be0ffcSDave Chinner */ 10184be0ffcSDave Chinner 10284be0ffcSDave Chinner #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) 10384be0ffcSDave Chinner #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) 10484be0ffcSDave Chinner 10584be0ffcSDave Chinner #define XFS_IFORK_PTR(ip,w) \ 10684be0ffcSDave Chinner ((w) == XFS_DATA_FORK ? \ 10784be0ffcSDave Chinner &(ip)->i_df : \ 1083993baebSDarrick J. Wong ((w) == XFS_ATTR_FORK ? \ 1093993baebSDarrick J. Wong (ip)->i_afp : \ 1103993baebSDarrick J. Wong (ip)->i_cowfp)) 11184be0ffcSDave Chinner #define XFS_IFORK_DSIZE(ip) \ 112e9e2eae8SChristoph Hellwig (XFS_IFORK_Q(ip) ? XFS_IFORK_BOFF(ip) : XFS_LITINO((ip)->i_mount)) 11384be0ffcSDave Chinner #define XFS_IFORK_ASIZE(ip) \ 114e9e2eae8SChristoph Hellwig (XFS_IFORK_Q(ip) ? XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : 0) 11584be0ffcSDave Chinner #define XFS_IFORK_SIZE(ip,w) \ 11684be0ffcSDave Chinner ((w) == XFS_DATA_FORK ? \ 11784be0ffcSDave Chinner XFS_IFORK_DSIZE(ip) : \ 1183993baebSDarrick J. Wong ((w) == XFS_ATTR_FORK ? \ 1193993baebSDarrick J. Wong XFS_IFORK_ASIZE(ip) : \ 1203993baebSDarrick J. Wong 0)) 12184be0ffcSDave Chinner #define XFS_IFORK_MAXEXT(ip, w) \ 12284be0ffcSDave Chinner (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) 12384be0ffcSDave Chinner 124f7e67b20SChristoph Hellwig static inline bool xfs_ifork_has_extents(struct xfs_ifork *ifp) 125f7e67b20SChristoph Hellwig { 126f7e67b20SChristoph Hellwig return ifp->if_format == XFS_DINODE_FMT_EXTENTS || 127f7e67b20SChristoph Hellwig ifp->if_format == XFS_DINODE_FMT_BTREE; 128f7e67b20SChristoph Hellwig } 1292fe4f928SDarrick J. Wong 130daf83964SChristoph Hellwig static inline xfs_extnum_t xfs_ifork_nextents(struct xfs_ifork *ifp) 131daf83964SChristoph Hellwig { 132daf83964SChristoph Hellwig if (!ifp) 133daf83964SChristoph Hellwig return 0; 134daf83964SChristoph Hellwig return ifp->if_nextents; 135daf83964SChristoph Hellwig } 136daf83964SChristoph Hellwig 137f7e67b20SChristoph Hellwig static inline int8_t xfs_ifork_format(struct xfs_ifork *ifp) 138f7e67b20SChristoph Hellwig { 139f7e67b20SChristoph Hellwig if (!ifp) 140f7e67b20SChristoph Hellwig return XFS_DINODE_FMT_EXTENTS; 141f7e67b20SChristoph Hellwig return ifp->if_format; 142f7e67b20SChristoph Hellwig } 143f7e67b20SChristoph Hellwig 1443993baebSDarrick J. Wong struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state); 1453993baebSDarrick J. Wong 1469229d18eSChristoph Hellwig int xfs_iformat_data_fork(struct xfs_inode *, struct xfs_dinode *); 1479229d18eSChristoph Hellwig int xfs_iformat_attr_fork(struct xfs_inode *, struct xfs_dinode *); 14878420281SDarrick J. Wong void xfs_iflush_fork(struct xfs_inode *, struct xfs_dinode *, 14984be0ffcSDave Chinner struct xfs_inode_log_item *, int); 150ef838512SChristoph Hellwig void xfs_idestroy_fork(struct xfs_ifork *ifp); 1513f8a4f1dSDave Chinner void xfs_idata_realloc(struct xfs_inode *ip, int64_t byte_diff, 1523f8a4f1dSDave Chinner int whichfork); 15384be0ffcSDave Chinner void xfs_iroot_realloc(struct xfs_inode *, int, int); 15484be0ffcSDave Chinner int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); 15584be0ffcSDave Chinner int xfs_iextents_copy(struct xfs_inode *, struct xfs_bmbt_rec *, 15684be0ffcSDave Chinner int); 1573f8a4f1dSDave Chinner void xfs_init_local_fork(struct xfs_inode *ip, int whichfork, 1583f8a4f1dSDave Chinner const void *data, int64_t size); 15984be0ffcSDave Chinner 1606bdcf26aSChristoph Hellwig xfs_extnum_t xfs_iext_count(struct xfs_ifork *ifp); 161b2b1712aSChristoph Hellwig void xfs_iext_insert(struct xfs_inode *, struct xfs_iext_cursor *cur, 1620254c2f2SChristoph Hellwig struct xfs_bmbt_irec *, int); 163b2b1712aSChristoph Hellwig void xfs_iext_remove(struct xfs_inode *, struct xfs_iext_cursor *, 164c38ccf59SChristoph Hellwig int); 16584be0ffcSDave Chinner void xfs_iext_destroy(struct xfs_ifork *); 16684be0ffcSDave Chinner 16793533c78SChristoph Hellwig bool xfs_iext_lookup_extent(struct xfs_inode *ip, 16893533c78SChristoph Hellwig struct xfs_ifork *ifp, xfs_fileoff_t bno, 169b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, 170b2b1712aSChristoph Hellwig struct xfs_bmbt_irec *gotp); 171dc56015fSChristoph Hellwig bool xfs_iext_lookup_extent_before(struct xfs_inode *ip, 172dc56015fSChristoph Hellwig struct xfs_ifork *ifp, xfs_fileoff_t *end, 173b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, 174b2b1712aSChristoph Hellwig struct xfs_bmbt_irec *gotp); 175b2b1712aSChristoph Hellwig bool xfs_iext_get_extent(struct xfs_ifork *ifp, 176b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, 17793533c78SChristoph Hellwig struct xfs_bmbt_irec *gotp); 178ca5d8e5bSChristoph Hellwig void xfs_iext_update_extent(struct xfs_inode *ip, int state, 179b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, 180b2b1712aSChristoph Hellwig struct xfs_bmbt_irec *gotp); 181b2b1712aSChristoph Hellwig 1826bdcf26aSChristoph Hellwig void xfs_iext_first(struct xfs_ifork *, struct xfs_iext_cursor *); 1836bdcf26aSChristoph Hellwig void xfs_iext_last(struct xfs_ifork *, struct xfs_iext_cursor *); 1846bdcf26aSChristoph Hellwig void xfs_iext_next(struct xfs_ifork *, struct xfs_iext_cursor *); 1856bdcf26aSChristoph Hellwig void xfs_iext_prev(struct xfs_ifork *, struct xfs_iext_cursor *); 186b2b1712aSChristoph Hellwig 187b2b1712aSChristoph Hellwig static inline bool xfs_iext_next_extent(struct xfs_ifork *ifp, 188b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 189b2b1712aSChristoph Hellwig { 190b2b1712aSChristoph Hellwig xfs_iext_next(ifp, cur); 191b2b1712aSChristoph Hellwig return xfs_iext_get_extent(ifp, cur, gotp); 192b2b1712aSChristoph Hellwig } 193b2b1712aSChristoph Hellwig 194b2b1712aSChristoph Hellwig static inline bool xfs_iext_prev_extent(struct xfs_ifork *ifp, 195b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 196b2b1712aSChristoph Hellwig { 197b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, cur); 198b2b1712aSChristoph Hellwig return xfs_iext_get_extent(ifp, cur, gotp); 199b2b1712aSChristoph Hellwig } 200b2b1712aSChristoph Hellwig 201b2b1712aSChristoph Hellwig /* 202b2b1712aSChristoph Hellwig * Return the extent after cur in gotp without updating the cursor. 203b2b1712aSChristoph Hellwig */ 204b2b1712aSChristoph Hellwig static inline bool xfs_iext_peek_next_extent(struct xfs_ifork *ifp, 205b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 206b2b1712aSChristoph Hellwig { 207b2b1712aSChristoph Hellwig struct xfs_iext_cursor ncur = *cur; 208b2b1712aSChristoph Hellwig 209b2b1712aSChristoph Hellwig xfs_iext_next(ifp, &ncur); 210b2b1712aSChristoph Hellwig return xfs_iext_get_extent(ifp, &ncur, gotp); 211b2b1712aSChristoph Hellwig } 212b2b1712aSChristoph Hellwig 213b2b1712aSChristoph Hellwig /* 214b2b1712aSChristoph Hellwig * Return the extent before cur in gotp without updating the cursor. 215b2b1712aSChristoph Hellwig */ 216b2b1712aSChristoph Hellwig static inline bool xfs_iext_peek_prev_extent(struct xfs_ifork *ifp, 217b2b1712aSChristoph Hellwig struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) 218b2b1712aSChristoph Hellwig { 219b2b1712aSChristoph Hellwig struct xfs_iext_cursor ncur = *cur; 220b2b1712aSChristoph Hellwig 221b2b1712aSChristoph Hellwig xfs_iext_prev(ifp, &ncur); 222b2b1712aSChristoph Hellwig return xfs_iext_get_extent(ifp, &ncur, gotp); 223b2b1712aSChristoph Hellwig } 224b2b1712aSChristoph Hellwig 225b2b1712aSChristoph Hellwig #define for_each_xfs_iext(ifp, ext, got) \ 226b2b1712aSChristoph Hellwig for (xfs_iext_first((ifp), (ext)); \ 227b2b1712aSChristoph Hellwig xfs_iext_get_extent((ifp), (ext), (got)); \ 228b2b1712aSChristoph Hellwig xfs_iext_next((ifp), (ext))) 22993533c78SChristoph Hellwig 23084be0ffcSDave Chinner extern struct kmem_zone *xfs_ifork_zone; 23184be0ffcSDave Chinner 2323993baebSDarrick J. Wong extern void xfs_ifork_init_cow(struct xfs_inode *ip); 2333993baebSDarrick J. Wong 2347c7ba218SChristoph Hellwig int xfs_ifork_verify_local_data(struct xfs_inode *ip); 2357c7ba218SChristoph Hellwig int xfs_ifork_verify_local_attr(struct xfs_inode *ip); 236b9b7e1dcSChandan Babu R int xfs_iext_count_may_overflow(struct xfs_inode *ip, int whichfork, 237b9b7e1dcSChandan Babu R int nr_to_add); 2389cfb9b47SDarrick J. Wong 23984be0ffcSDave Chinner #endif /* __XFS_INODE_FORK_H__ */ 240