include/linux/ceph/striper.h

Source file repositories/reference/linux-study-clean/include/linux/ceph/striper.h

File Facts

System
Linux kernel
Corpus path
include/linux/ceph/striper.h
Extension
.h
Size
1781 bytes
Lines
72
Domain
Core OS
Bucket
Core Kernel Interface
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 ceph_object_extent {
	struct list_head oe_item;
	u64 oe_objno;
	u64 oe_off;
	u64 oe_len;
};

static inline void ceph_object_extent_init(struct ceph_object_extent *ex)
{
	INIT_LIST_HEAD(&ex->oe_item);
}

/*
 * Called for each mapped stripe unit.
 *
 * @bytes: number of bytes mapped, i.e. the minimum of the full length
 *         requested (file extent length) or the remainder of the stripe
 *         unit within an object
 */
typedef void (*ceph_object_extent_fn_t)(struct ceph_object_extent *ex,
					u32 bytes, void *arg);

int ceph_file_to_extents(struct ceph_file_layout *l, u64 off, u64 len,
			 struct list_head *object_extents,
			 struct ceph_object_extent *alloc_fn(void *arg),
			 void *alloc_arg,
			 ceph_object_extent_fn_t action_fn,
			 void *action_arg);
int ceph_iterate_extents(struct ceph_file_layout *l, u64 off, u64 len,
			 struct list_head *object_extents,
			 ceph_object_extent_fn_t action_fn,
			 void *action_arg);

struct ceph_file_extent {
	u64 fe_off;
	u64 fe_len;
};

static inline u64 ceph_file_extents_bytes(struct ceph_file_extent *file_extents,
					  u32 num_file_extents)
{
	u64 bytes = 0;
	u32 i;

	for (i = 0; i < num_file_extents; i++)
		bytes += file_extents[i].fe_len;

	return bytes;
}

int ceph_extent_to_file(struct ceph_file_layout *l,
			u64 objno, u64 objoff, u64 objlen,
			struct ceph_file_extent **file_extents,
			u32 *num_file_extents);

u64 ceph_get_num_objects(struct ceph_file_layout *l, u64 size);

#endif

Annotation

Implementation Notes