mirror of https://gitee.com/openkylin/linux.git
177 lines
5.4 KiB
C
177 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*/
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#ifndef __XFS_INODE_FORK_H__
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#define __XFS_INODE_FORK_H__
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struct xfs_inode_log_item;
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struct xfs_dinode;
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/*
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* File incore extent information, present for each of data & attr forks.
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*/
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struct xfs_ifork {
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int64_t if_bytes; /* bytes in if_u1 */
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struct xfs_btree_block *if_broot; /* file's incore btree root */
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unsigned int if_seq; /* fork mod counter */
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int if_height; /* height of the extent tree */
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union {
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void *if_root; /* extent tree root */
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char *if_data; /* inline file data */
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} if_u1;
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short if_broot_bytes; /* bytes allocated for root */
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unsigned char if_flags; /* per-fork flags */
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int8_t if_format; /* format of this fork */
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xfs_extnum_t if_nextents; /* # of extents in this fork */
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};
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/*
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* Per-fork incore inode flags.
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*/
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#define XFS_IFINLINE 0x01 /* Inline data is read in */
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#define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */
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#define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */
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/*
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* Fork handling.
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*/
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#define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0)
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#define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3))
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#define XFS_IFORK_PTR(ip,w) \
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((w) == XFS_DATA_FORK ? \
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&(ip)->i_df : \
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((w) == XFS_ATTR_FORK ? \
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(ip)->i_afp : \
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(ip)->i_cowfp))
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#define XFS_IFORK_DSIZE(ip) \
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(XFS_IFORK_Q(ip) ? XFS_IFORK_BOFF(ip) : XFS_LITINO((ip)->i_mount))
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#define XFS_IFORK_ASIZE(ip) \
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(XFS_IFORK_Q(ip) ? XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : 0)
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#define XFS_IFORK_SIZE(ip,w) \
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((w) == XFS_DATA_FORK ? \
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XFS_IFORK_DSIZE(ip) : \
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((w) == XFS_ATTR_FORK ? \
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XFS_IFORK_ASIZE(ip) : \
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0))
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#define XFS_IFORK_MAXEXT(ip, w) \
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(XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t))
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static inline bool xfs_ifork_has_extents(struct xfs_ifork *ifp)
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{
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return ifp->if_format == XFS_DINODE_FMT_EXTENTS ||
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ifp->if_format == XFS_DINODE_FMT_BTREE;
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}
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static inline xfs_extnum_t xfs_ifork_nextents(struct xfs_ifork *ifp)
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{
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if (!ifp)
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return 0;
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return ifp->if_nextents;
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}
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static inline int8_t xfs_ifork_format(struct xfs_ifork *ifp)
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{
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if (!ifp)
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return XFS_DINODE_FMT_EXTENTS;
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return ifp->if_format;
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}
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struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state);
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int xfs_iformat_data_fork(struct xfs_inode *, struct xfs_dinode *);
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int xfs_iformat_attr_fork(struct xfs_inode *, struct xfs_dinode *);
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void xfs_iflush_fork(struct xfs_inode *, struct xfs_dinode *,
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struct xfs_inode_log_item *, int);
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void xfs_idestroy_fork(struct xfs_ifork *ifp);
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void xfs_idata_realloc(struct xfs_inode *ip, int64_t byte_diff,
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int whichfork);
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void xfs_iroot_realloc(struct xfs_inode *, int, int);
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int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
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int xfs_iextents_copy(struct xfs_inode *, struct xfs_bmbt_rec *,
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int);
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void xfs_init_local_fork(struct xfs_inode *ip, int whichfork,
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const void *data, int64_t size);
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xfs_extnum_t xfs_iext_count(struct xfs_ifork *ifp);
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void xfs_iext_insert(struct xfs_inode *, struct xfs_iext_cursor *cur,
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struct xfs_bmbt_irec *, int);
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void xfs_iext_remove(struct xfs_inode *, struct xfs_iext_cursor *,
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int);
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void xfs_iext_destroy(struct xfs_ifork *);
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bool xfs_iext_lookup_extent(struct xfs_inode *ip,
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struct xfs_ifork *ifp, xfs_fileoff_t bno,
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struct xfs_iext_cursor *cur,
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struct xfs_bmbt_irec *gotp);
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bool xfs_iext_lookup_extent_before(struct xfs_inode *ip,
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struct xfs_ifork *ifp, xfs_fileoff_t *end,
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struct xfs_iext_cursor *cur,
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struct xfs_bmbt_irec *gotp);
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bool xfs_iext_get_extent(struct xfs_ifork *ifp,
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struct xfs_iext_cursor *cur,
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struct xfs_bmbt_irec *gotp);
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void xfs_iext_update_extent(struct xfs_inode *ip, int state,
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struct xfs_iext_cursor *cur,
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struct xfs_bmbt_irec *gotp);
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void xfs_iext_first(struct xfs_ifork *, struct xfs_iext_cursor *);
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void xfs_iext_last(struct xfs_ifork *, struct xfs_iext_cursor *);
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void xfs_iext_next(struct xfs_ifork *, struct xfs_iext_cursor *);
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void xfs_iext_prev(struct xfs_ifork *, struct xfs_iext_cursor *);
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static inline bool xfs_iext_next_extent(struct xfs_ifork *ifp,
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struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp)
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{
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xfs_iext_next(ifp, cur);
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return xfs_iext_get_extent(ifp, cur, gotp);
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}
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static inline bool xfs_iext_prev_extent(struct xfs_ifork *ifp,
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struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp)
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{
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xfs_iext_prev(ifp, cur);
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return xfs_iext_get_extent(ifp, cur, gotp);
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}
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/*
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* Return the extent after cur in gotp without updating the cursor.
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*/
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static inline bool xfs_iext_peek_next_extent(struct xfs_ifork *ifp,
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struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp)
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{
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struct xfs_iext_cursor ncur = *cur;
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xfs_iext_next(ifp, &ncur);
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return xfs_iext_get_extent(ifp, &ncur, gotp);
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}
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/*
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* Return the extent before cur in gotp without updating the cursor.
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*/
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static inline bool xfs_iext_peek_prev_extent(struct xfs_ifork *ifp,
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struct xfs_iext_cursor *cur, struct xfs_bmbt_irec *gotp)
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{
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struct xfs_iext_cursor ncur = *cur;
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xfs_iext_prev(ifp, &ncur);
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return xfs_iext_get_extent(ifp, &ncur, gotp);
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}
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#define for_each_xfs_iext(ifp, ext, got) \
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for (xfs_iext_first((ifp), (ext)); \
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xfs_iext_get_extent((ifp), (ext), (got)); \
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xfs_iext_next((ifp), (ext)))
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extern struct kmem_zone *xfs_ifork_zone;
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extern void xfs_ifork_init_cow(struct xfs_inode *ip);
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int xfs_ifork_verify_local_data(struct xfs_inode *ip);
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int xfs_ifork_verify_local_attr(struct xfs_inode *ip);
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#endif /* __XFS_INODE_FORK_H__ */
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