diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_inode_fork.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_inode_fork.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h new file mode 100644 index 000000000..a4953e95c --- /dev/null +++ b/fs/xfs/libxfs/xfs_inode_fork.h @@ -0,0 +1,176 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. + * All Rights Reserved. + */ +#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. + */ +struct xfs_ifork { + int64_t if_bytes; /* bytes in if_u1 */ + struct xfs_btree_block *if_broot; /* file's incore btree root */ + unsigned int if_seq; /* fork mod counter */ + int if_height; /* height of the extent tree */ + union { + void *if_root; /* extent tree root */ + char *if_data; /* inline file data */ + } if_u1; + short if_broot_bytes; /* bytes allocated for root */ + unsigned char if_flags; /* per-fork flags */ + int8_t if_format; /* format of this fork */ + xfs_extnum_t if_nextents; /* # of extents in this fork */ +}; + +/* + * 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)) +#define XFS_IFORK_ASIZE(ip) \ + (XFS_IFORK_Q(ip) ? XFS_LITINO((ip)->i_mount) - 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_MAXEXT(ip, w) \ + (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) + +static inline bool xfs_ifork_has_extents(struct xfs_ifork *ifp) +{ + return ifp->if_format == XFS_DINODE_FMT_EXTENTS || + ifp->if_format == XFS_DINODE_FMT_BTREE; +} + +static inline xfs_extnum_t xfs_ifork_nextents(struct xfs_ifork *ifp) +{ + if (!ifp) + return 0; + return ifp->if_nextents; +} + +static inline int8_t xfs_ifork_format(struct xfs_ifork *ifp) +{ + if (!ifp) + return XFS_DINODE_FMT_EXTENTS; + return ifp->if_format; +} + +struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state); + +int xfs_iformat_data_fork(struct xfs_inode *, struct xfs_dinode *); +int xfs_iformat_attr_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_ifork *ifp); +void xfs_idata_realloc(struct xfs_inode *ip, int64_t byte_diff, + int whichfork); +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 *ip, int whichfork, + const void *data, int64_t size); + +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); + +int xfs_ifork_verify_local_data(struct xfs_inode *ip); +int xfs_ifork_verify_local_attr(struct xfs_inode *ip); + +#endif /* __XFS_INODE_FORK_H__ */ |