xfs_metafile.h

 1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Copyright (c) 2018-2024 Oracle.  All Rights Reserved.
 4 * Author: Darrick J. Wong <djwong@kernel.org>
 5 */
 6#ifndef __XFS_METAFILE_H__
 7#define __XFS_METAFILE_H__
 8
 9const char *xfs_metafile_type_str(enum xfs_metafile_type metatype);
10
11/* All metadata files must have these flags set. */
12#define XFS_METAFILE_DIFLAGS	(XFS_DIFLAG_IMMUTABLE | \
13				 XFS_DIFLAG_SYNC | \
14				 XFS_DIFLAG_NOATIME | \
15				 XFS_DIFLAG_NODUMP | \
16				 XFS_DIFLAG_NODEFRAG)
17
18/* All metadata directories must have these flags set. */
19#define XFS_METADIR_DIFLAGS	(XFS_METAFILE_DIFLAGS | \
20				 XFS_DIFLAG_NOSYMLINKS)
21
22void xfs_metafile_set_iflag(struct xfs_trans *tp, struct xfs_inode *ip,
23		enum xfs_metafile_type metafile_type);
24void xfs_metafile_clear_iflag(struct xfs_trans *tp, struct xfs_inode *ip);
25
26/* Space reservations for metadata inodes. */
27struct xfs_alloc_arg;
28
29bool xfs_metafile_resv_critical(struct xfs_mount *mp);
30void xfs_metafile_resv_alloc_space(struct xfs_inode *ip,
31		struct xfs_alloc_arg *args);
32void xfs_metafile_resv_free_space(struct xfs_inode *ip, struct xfs_trans *tp,
33		xfs_filblks_t len);
34void xfs_metafile_resv_free(struct xfs_mount *mp);
35int xfs_metafile_resv_init(struct xfs_mount *mp);
36
37/* Code specific to kernel/userspace; must be provided externally. */
38
39int xfs_trans_metafile_iget(struct xfs_trans *tp, xfs_ino_t ino,
40		enum xfs_metafile_type metafile_type, struct xfs_inode **ipp);
41int xfs_metafile_iget(struct xfs_mount *mp, xfs_ino_t ino,
42		enum xfs_metafile_type metafile_type, struct xfs_inode **ipp);
43
44#endif /* __XFS_METAFILE_H__ */