193 lines
6.0 KiB
C
193 lines
6.0 KiB
C
// 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 */
|
|
};
|
|
|
|
/*
|
|
* 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_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))
|
|
|
|
#define xfs_ifork_has_extents(ip, w) \
|
|
(XFS_IFORK_FORMAT((ip), (w)) == XFS_DINODE_FMT_EXTENTS || \
|
|
XFS_IFORK_FORMAT((ip), (w)) == XFS_DINODE_FMT_BTREE)
|
|
|
|
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 *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);
|
|
|
|
typedef xfs_failaddr_t (*xfs_ifork_verifier_t)(struct xfs_inode *);
|
|
|
|
struct xfs_ifork_ops {
|
|
xfs_ifork_verifier_t verify_symlink;
|
|
xfs_ifork_verifier_t verify_dir;
|
|
xfs_ifork_verifier_t verify_attr;
|
|
};
|
|
extern struct xfs_ifork_ops xfs_default_ifork_ops;
|
|
|
|
xfs_failaddr_t xfs_ifork_verify_data(struct xfs_inode *ip,
|
|
struct xfs_ifork_ops *ops);
|
|
xfs_failaddr_t xfs_ifork_verify_attr(struct xfs_inode *ip,
|
|
struct xfs_ifork_ops *ops);
|
|
|
|
#endif /* __XFS_INODE_FORK_H__ */
|