mirror of
https://git.proxmox.com/git/mirror_ubuntu-kernels.git
synced 2026-01-24 09:28:13 +00:00
b7c62d90c1
Add parent pointer attribute during xfs_create, and subroutines to initialize attributes. Note that the xfs_attr_intent object contains a pointer to the caller's xfs_da_args object, so the latter must persist until transaction commit. Signed-off-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Allison Henderson <allison.henderson@oracle.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> [djwong: shorten names, adjust to new format, set init_xattrs for parent pointers] Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (c) 2022-2024 Oracle.
|
|
* All Rights Reserved.
|
|
*/
|
|
#ifndef __XFS_PARENT_H__
|
|
#define __XFS_PARENT_H__
|
|
|
|
/* Metadata validators */
|
|
bool xfs_parent_namecheck(unsigned int attr_flags, const void *name,
|
|
size_t length);
|
|
bool xfs_parent_valuecheck(struct xfs_mount *mp, const void *value,
|
|
size_t valuelen);
|
|
|
|
xfs_dahash_t xfs_parent_hashval(struct xfs_mount *mp, const uint8_t *name,
|
|
int namelen, xfs_ino_t parent_ino);
|
|
xfs_dahash_t xfs_parent_hashattr(struct xfs_mount *mp, const uint8_t *name,
|
|
int namelen, const void *value, int valuelen);
|
|
|
|
/* Initializes a xfs_parent_rec to be stored as an attribute name. */
|
|
static inline void
|
|
xfs_parent_rec_init(
|
|
struct xfs_parent_rec *rec,
|
|
xfs_ino_t ino,
|
|
uint32_t gen)
|
|
{
|
|
rec->p_ino = cpu_to_be64(ino);
|
|
rec->p_gen = cpu_to_be32(gen);
|
|
}
|
|
|
|
/* Initializes a xfs_parent_rec to be stored as an attribute name. */
|
|
static inline void
|
|
xfs_inode_to_parent_rec(
|
|
struct xfs_parent_rec *rec,
|
|
const struct xfs_inode *dp)
|
|
{
|
|
xfs_parent_rec_init(rec, dp->i_ino, VFS_IC(dp)->i_generation);
|
|
}
|
|
|
|
extern struct kmem_cache *xfs_parent_args_cache;
|
|
|
|
/*
|
|
* Parent pointer information needed to pass around the deferred xattr update
|
|
* machinery.
|
|
*/
|
|
struct xfs_parent_args {
|
|
struct xfs_parent_rec rec;
|
|
struct xfs_da_args args;
|
|
};
|
|
|
|
/*
|
|
* Start a parent pointer update by allocating the context object we need to
|
|
* perform a parent pointer update.
|
|
*/
|
|
static inline int
|
|
xfs_parent_start(
|
|
struct xfs_mount *mp,
|
|
struct xfs_parent_args **ppargsp)
|
|
{
|
|
if (!xfs_has_parent(mp)) {
|
|
*ppargsp = NULL;
|
|
return 0;
|
|
}
|
|
|
|
*ppargsp = kmem_cache_zalloc(xfs_parent_args_cache, GFP_KERNEL);
|
|
if (!*ppargsp)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
/* Finish a parent pointer update by freeing the context object. */
|
|
static inline void
|
|
xfs_parent_finish(
|
|
struct xfs_mount *mp,
|
|
struct xfs_parent_args *ppargs)
|
|
{
|
|
if (ppargs)
|
|
kmem_cache_free(xfs_parent_args_cache, ppargs);
|
|
}
|
|
|
|
int xfs_parent_addname(struct xfs_trans *tp, struct xfs_parent_args *ppargs,
|
|
struct xfs_inode *dp, const struct xfs_name *parent_name,
|
|
struct xfs_inode *child);
|
|
|
|
#endif /* __XFS_PARENT_H__ */
|