fs/xfs/xfs_attr_item.h

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

File Facts

System
Linux kernel
Corpus path
fs/xfs/xfs_attr_item.h
Extension
.h
Size
2004 bytes
Lines
65
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_attri_log_nameval {
	struct kvec		name;
	struct kvec		new_name;	/* PPTR_REPLACE only */
	struct kvec		value;
	struct kvec		new_value;	/* PPTR_REPLACE only */
	refcount_t		refcount;

	/* name and value follow the end of this struct */
};

/*
 * This is the "attr intention" log item.  It is used to log the fact that some
 * extended attribute operations need to be processed.  An operation is
 * currently either a set or remove.  Set or remove operations are described by
 * the xfs_attr_intent which may be logged to this intent.
 *
 * During a normal attr operation, name and value point to the name and value
 * fields of the caller's xfs_da_args structure.  During a recovery, the name
 * and value buffers are copied from the log, and stored in a trailing buffer
 * attached to the xfs_attr_intent until they are committed.  They are freed
 * when the xfs_attr_intent itself is freed when the work is done.
 */
struct xfs_attri_log_item {
	struct xfs_log_item		attri_item;
	atomic_t			attri_refcount;
	struct xfs_attri_log_nameval	*attri_nameval;
	struct xfs_attri_log_format	attri_format;
};

/*
 * This is the "attr done" log item.  It is used to log the fact that some attrs
 * earlier mentioned in an attri item have been freed.
 */
struct xfs_attrd_log_item {
	struct xfs_log_item		attrd_item;
	struct xfs_attri_log_item	*attrd_attrip;
	struct xfs_attrd_log_format	attrd_format;
};

extern struct kmem_cache	*xfs_attri_cache;
extern struct kmem_cache	*xfs_attrd_cache;

enum xfs_attr_defer_op {
	XFS_ATTR_DEFER_SET,
	XFS_ATTR_DEFER_REMOVE,
	XFS_ATTR_DEFER_REPLACE,
};

void xfs_attr_defer_add(struct xfs_da_args *args, enum xfs_attr_defer_op op);

#endif	/* __XFS_ATTR_ITEM_H__ */

Annotation

Implementation Notes