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9f9bc034b8
The sequence counter in the xfs_ifork structure is only updated on COW forks. This is because the counter is currently only used to optimize out repetitive COW fork checks at writeback time. Tweak the extent code to update the seq counter regardless of the fork type in preparation for using this counter on data forks as well. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Allison Henderson <allison.henderson@oracle.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
191 lines
5.8 KiB
C
191 lines
5.8 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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int if_bytes; /* bytes in if_u1 */
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unsigned int if_seq; /* fork mod counter */
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struct xfs_btree_block *if_broot; /* file's incore btree root */
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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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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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};
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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) ? \
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XFS_IFORK_BOFF(ip) : \
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XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version))
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#define XFS_IFORK_ASIZE(ip) \
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(XFS_IFORK_Q(ip) ? \
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XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version) - \
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XFS_IFORK_BOFF(ip) : \
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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_FORMAT(ip,w) \
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((w) == XFS_DATA_FORK ? \
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(ip)->i_d.di_format : \
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((w) == XFS_ATTR_FORK ? \
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(ip)->i_d.di_aformat : \
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(ip)->i_cformat))
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#define XFS_IFORK_FMT_SET(ip,w,n) \
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((w) == XFS_DATA_FORK ? \
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((ip)->i_d.di_format = (n)) : \
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((w) == XFS_ATTR_FORK ? \
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((ip)->i_d.di_aformat = (n)) : \
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((ip)->i_cformat = (n))))
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#define XFS_IFORK_NEXTENTS(ip,w) \
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((w) == XFS_DATA_FORK ? \
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(ip)->i_d.di_nextents : \
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((w) == XFS_ATTR_FORK ? \
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(ip)->i_d.di_anextents : \
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(ip)->i_cnextents))
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#define XFS_IFORK_NEXT_SET(ip,w,n) \
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((w) == XFS_DATA_FORK ? \
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((ip)->i_d.di_nextents = (n)) : \
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((w) == XFS_ATTR_FORK ? \
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((ip)->i_d.di_anextents = (n)) : \
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((ip)->i_cnextents = (n))))
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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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struct xfs_ifork *xfs_iext_state_to_fork(struct xfs_inode *ip, int state);
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int xfs_iformat_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_inode *, int);
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void xfs_idata_realloc(struct xfs_inode *, int, int);
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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 *, int, const void *, int);
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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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typedef xfs_failaddr_t (*xfs_ifork_verifier_t)(struct xfs_inode *);
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struct xfs_ifork_ops {
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xfs_ifork_verifier_t verify_symlink;
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xfs_ifork_verifier_t verify_dir;
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xfs_ifork_verifier_t verify_attr;
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};
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extern struct xfs_ifork_ops xfs_default_ifork_ops;
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xfs_failaddr_t xfs_ifork_verify_data(struct xfs_inode *ip,
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struct xfs_ifork_ops *ops);
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xfs_failaddr_t xfs_ifork_verify_attr(struct xfs_inode *ip,
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struct xfs_ifork_ops *ops);
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#endif /* __XFS_INODE_FORK_H__ */
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