| /* |
| * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #ifndef __XFS_INODE_FORK_H__ |
| #define __XFS_INODE_FORK_H__ |
| |
| struct xfs_inode_log_item; |
| struct xfs_dinode; |
| |
| /* |
| * File incore extent information, present for each of data & attr forks. |
| */ |
| typedef struct xfs_ifork { |
| int if_bytes; /* bytes in if_u1 */ |
| int if_real_bytes; /* bytes allocated in if_u1 */ |
| struct xfs_btree_block *if_broot; /* file's incore btree root */ |
| short if_broot_bytes; /* bytes allocated for root */ |
| unsigned char if_flags; /* per-fork flags */ |
| int if_height; /* height of the extent tree */ |
| union { |
| void *if_root; /* extent tree root */ |
| char *if_data; /* inline file data */ |
| } if_u1; |
| } xfs_ifork_t; |
| |
| /* |
| * Per-fork incore inode flags. |
| */ |
| #define XFS_IFINLINE 0x01 /* Inline data is read in */ |
| #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ |
| #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ |
| |
| /* |
| * Fork handling. |
| */ |
| |
| #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) |
| #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) |
| |
| #define XFS_IFORK_PTR(ip,w) \ |
| ((w) == XFS_DATA_FORK ? \ |
| &(ip)->i_df : \ |
| ((w) == XFS_ATTR_FORK ? \ |
| (ip)->i_afp : \ |
| (ip)->i_cowfp)) |
| #define XFS_IFORK_DSIZE(ip) \ |
| (XFS_IFORK_Q(ip) ? \ |
| XFS_IFORK_BOFF(ip) : \ |
| XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version)) |
| #define XFS_IFORK_ASIZE(ip) \ |
| (XFS_IFORK_Q(ip) ? \ |
| XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version) - \ |
| XFS_IFORK_BOFF(ip) : \ |
| 0) |
| #define XFS_IFORK_SIZE(ip,w) \ |
| ((w) == XFS_DATA_FORK ? \ |
| XFS_IFORK_DSIZE(ip) : \ |
| ((w) == XFS_ATTR_FORK ? \ |
| XFS_IFORK_ASIZE(ip) : \ |
| 0)) |
| #define XFS_IFORK_FORMAT(ip,w) \ |
| ((w) == XFS_DATA_FORK ? \ |
| (ip)->i_d.di_format : \ |
| ((w) == XFS_ATTR_FORK ? \ |
| (ip)->i_d.di_aformat : \ |
| (ip)->i_cformat)) |
| #define XFS_IFORK_FMT_SET(ip,w,n) \ |
| ((w) == XFS_DATA_FORK ? \ |
| ((ip)->i_d.di_format = (n)) : \ |
| ((w) == XFS_ATTR_FORK ? \ |
| ((ip)->i_d.di_aformat = (n)) : \ |
| ((ip)->i_cformat = (n)))) |
| #define XFS_IFORK_NEXTENTS(ip,w) \ |
| ((w) == XFS_DATA_FORK ? \ |
| (ip)->i_d.di_nextents : \ |
| ((w) == XFS_ATTR_FORK ? \ |
| (ip)->i_d.di_anextents : \ |
| (ip)->i_cnextents)) |
| #define XFS_IFORK_NEXT_SET(ip,w,n) \ |
| ((w) == XFS_DATA_FORK ? \ |
| ((ip)->i_d.di_nextents = (n)) : \ |
| ((w) == XFS_ATTR_FORK ? \ |
| ((ip)->i_d.di_anextents = (n)) : \ |
| ((ip)->i_cnextents = (n)))) |
| #define XFS_IFORK_MAXEXT(ip, w) \ |
| (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) |
| |
| struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state); |
| |
| int xfs_iformat_fork(struct xfs_inode *, struct xfs_dinode *); |
| void xfs_iflush_fork(struct xfs_inode *, struct xfs_dinode *, |
| struct xfs_inode_log_item *, int); |
| void xfs_idestroy_fork(struct xfs_inode *, int); |
| void xfs_idata_realloc(struct xfs_inode *, int, int); |
| void xfs_iroot_realloc(struct xfs_inode *, int, int); |
| int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); |
| int xfs_iextents_copy(struct xfs_inode *, struct xfs_bmbt_rec *, |
| int); |
| void xfs_init_local_fork(struct xfs_inode *, int, const void *, int); |
| |
| xfs_extnum_t xfs_iext_count(struct xfs_ifork *ifp); |
| void xfs_iext_insert(struct xfs_inode *, struct xfs_iext_cursor *cur, |
| struct xfs_bmbt_irec *, int); |
| void xfs_iext_remove(struct xfs_inode *, struct xfs_iext_cursor *, |
| int); |
| void xfs_iext_destroy(struct xfs_ifork *); |
| |
| bool xfs_iext_lookup_extent(struct xfs_inode *ip, |
| struct xfs_ifork *ifp, xfs_fileoff_t bno, |
| struct xfs_iext_cursor *cur, |
| struct xfs_bmbt_irec *gotp); |
| bool xfs_iext_lookup_extent_before(struct xfs_inode *ip, |
| struct xfs_ifork *ifp, xfs_fileoff_t *end, |
| struct xfs_iext_cursor *cur, |
| struct xfs_bmbt_irec *gotp); |
| bool xfs_iext_get_extent(struct xfs_ifork *ifp, |
| struct xfs_iext_cursor *cur, |
| struct xfs_bmbt_irec *gotp); |
| void xfs_iext_update_extent(struct xfs_inode *ip, int state, |
| struct xfs_iext_cursor *cur, |
| struct xfs_bmbt_irec *gotp); |
| |
| void xfs_iext_first(struct xfs_ifork *, struct xfs_iext_cursor *); |
| void xfs_iext_last(struct xfs_ifork *, struct xfs_iext_cursor *); |
| void xfs_iext_next(struct xfs_ifork *, struct xfs_iext_cursor *); |
| void xfs_iext_prev(struct xfs_ifork *, struct xfs_iext_cursor *); |
| |
| static inline bool xfs_iext_next_extent(struct xfs_ifork *ifp, |
| struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) |
| { |
| xfs_iext_next(ifp, cur); |
| return xfs_iext_get_extent(ifp, cur, gotp); |
| } |
| |
| static inline bool xfs_iext_prev_extent(struct xfs_ifork *ifp, |
| struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) |
| { |
| xfs_iext_prev(ifp, cur); |
| return xfs_iext_get_extent(ifp, cur, gotp); |
| } |
| |
| /* |
| * Return the extent after cur in gotp without updating the cursor. |
| */ |
| static inline bool xfs_iext_peek_next_extent(struct xfs_ifork *ifp, |
| struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) |
| { |
| struct xfs_iext_cursor ncur = *cur; |
| |
| xfs_iext_next(ifp, &ncur); |
| return xfs_iext_get_extent(ifp, &ncur, gotp); |
| } |
| |
| /* |
| * Return the extent before cur in gotp without updating the cursor. |
| */ |
| static inline bool xfs_iext_peek_prev_extent(struct xfs_ifork *ifp, |
| struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp) |
| { |
| struct xfs_iext_cursor ncur = *cur; |
| |
| xfs_iext_prev(ifp, &ncur); |
| return xfs_iext_get_extent(ifp, &ncur, gotp); |
| } |
| |
| #define for_each_xfs_iext(ifp, ext, got) \ |
| for (xfs_iext_first((ifp), (ext)); \ |
| xfs_iext_get_extent((ifp), (ext), (got)); \ |
| xfs_iext_next((ifp), (ext))) |
| |
| extern struct kmem_zone *xfs_ifork_zone; |
| |
| extern void xfs_ifork_init_cow(struct xfs_inode *ip); |
| |
| #endif /* __XFS_INODE_FORK_H__ */ |