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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2021 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_IMETA_H__
#define __XFS_IMETA_H__
/* How deep can we nest metadata dirs? */
#define XFS_IMETA_MAX_DEPTH 64
/* Form an imeta path from a simple array of strings. */
#define XFS_IMETA_DEFINE_PATH(name, path) \
const struct xfs_imeta_path name = { \
.im_path = (path), \
.im_ftype = XFS_DIR3_FT_REG_FILE, \
.im_depth = ARRAY_SIZE(path), \
}
/* Key for looking up metadata inodes. */
struct xfs_imeta_path {
/* Array of string pointers. */
const char **im_path;
/* Number of strings in path. */
unsigned int im_depth;
/* Expected file type. */
unsigned int im_ftype;
};
/* Cleanup widget for metadata inode creation and deletion. */
struct xfs_imeta_end {
struct xfs_inode *dp;
};
/* Lookup keys for static metadata inodes. */
extern const struct xfs_imeta_path XFS_IMETA_RTBITMAP;
extern const struct xfs_imeta_path XFS_IMETA_RTSUMMARY;
extern const struct xfs_imeta_path XFS_IMETA_USRQUOTA;
extern const struct xfs_imeta_path XFS_IMETA_GRPQUOTA;
extern const struct xfs_imeta_path XFS_IMETA_PRJQUOTA;
extern const struct xfs_imeta_path XFS_IMETA_METADIR;
int xfs_imeta_lookup(struct xfs_mount *mp, const struct xfs_imeta_path *path,
xfs_ino_t *ino);
void xfs_imeta_set_metaflag(struct xfs_trans *tp, struct xfs_inode *ip);
/* Don't allocate quota for this file. */
#define XFS_IMETA_CREATE_NOQUOTA (1 << 0)
int xfs_imeta_create(struct xfs_trans **tpp, const struct xfs_imeta_path *path,
umode_t mode, unsigned int flags, struct xfs_inode **ipp,
struct xfs_imeta_end *cleanup);
int xfs_imeta_unlink(struct xfs_trans **tpp, const struct xfs_imeta_path *path,
struct xfs_inode *ip, struct xfs_imeta_end *cleanup);
int xfs_imeta_link(struct xfs_trans *tp, const struct xfs_imeta_path *path,
struct xfs_inode *ip, struct xfs_imeta_end *cleanup);
void xfs_imeta_end_update(struct xfs_mount *mp, struct xfs_imeta_end *cleanup,
int error);
bool xfs_is_static_meta_ino(struct xfs_mount *mp, xfs_ino_t ino);
int xfs_imeta_mount(struct xfs_mount *mp);
void xfs_imeta_droplink(struct xfs_inode *ip);
unsigned int xfs_imeta_create_space_res(struct xfs_mount *mp);
unsigned int xfs_imeta_unlink_space_res(struct xfs_mount *mp);
/* Space reservations for metadata inodes. */
struct xfs_alloc_arg;
bool xfs_imeta_resv_critical(struct xfs_mount *mp, struct xfs_inode *ip);
void xfs_imeta_resv_alloc_extent(struct xfs_inode *ip,
struct xfs_alloc_arg *args);
void xfs_imeta_resv_free_extent(struct xfs_inode *ip, struct xfs_trans *tp,
xfs_filblks_t len);
void xfs_imeta_resv_free_inode(struct xfs_mount *mp, struct xfs_inode *ip);
int xfs_imeta_resv_init_inode(struct xfs_mount *mp, struct xfs_inode *ip,
xfs_filblks_t ask);
/* Must be implemented by the libxfs client */
int xfs_imeta_iget(struct xfs_mount *mp, xfs_ino_t ino, unsigned char ftype,
struct xfs_inode **ipp);
void xfs_imeta_irele(struct xfs_inode *ip);
int xfs_imeta_ensure_dirpath(struct xfs_mount *mp,
const struct xfs_imeta_path *path);
#endif /* __XFS_IMETA_H__ */
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