fs/xfs/libxfs/xfs_parent.h

Source file repositories/reference/linux-study-clean/fs/xfs/libxfs/xfs_parent.h

File Facts

System
Linux kernel
Corpus path
fs/xfs/libxfs/xfs_parent.h
Extension
.h
Size
3260 bytes
Lines
111
Domain
Core OS
Bucket
VFS And Filesystem Core
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct xfs_parent_args {
	struct xfs_parent_rec	rec;
	struct xfs_parent_rec	new_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);
int xfs_parent_removename(struct xfs_trans *tp, struct xfs_parent_args *ppargs,
		struct xfs_inode *dp, const struct xfs_name *parent_name,
		struct xfs_inode *child);
int xfs_parent_replacename(struct xfs_trans *tp,
		struct xfs_parent_args *ppargs,
		struct xfs_inode *old_dp, const struct xfs_name *old_name,
		struct xfs_inode *new_dp, const struct xfs_name *new_name,
		struct xfs_inode *child);

int xfs_parent_from_attr(struct xfs_mount *mp, unsigned int attr_flags,
		const unsigned char *name, unsigned int namelen,
		const void *value, unsigned int valuelen,
		xfs_ino_t *parent_ino, uint32_t *parent_gen);

/* Repair functions */
int xfs_parent_lookup(struct xfs_trans *tp, struct xfs_inode *ip,
		const struct xfs_name *name, struct xfs_parent_rec *pptr,
		struct xfs_da_args *scratch);
int xfs_parent_set(struct xfs_inode *ip, xfs_ino_t owner,
		const struct xfs_name *name, struct xfs_parent_rec *pptr,
		struct xfs_da_args *scratch);
int xfs_parent_unset(struct xfs_inode *ip, xfs_ino_t owner,
		const struct xfs_name *name, struct xfs_parent_rec *pptr,
		struct xfs_da_args *scratch);

#endif /* __XFS_PARENT_H__ */

Annotation

Implementation Notes