1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_CEPH_STRIPER_H
#define _LINUX_CEPH_STRIPER_H
#include <linux/list.h>
#include <linux/types.h>
struct ceph_file_layout;
void ceph_calc_file_object_mapping(struct ceph_file_layout *l,
u64 off, u64 len,
u64 *objno, u64 *objoff, u32 *xlen);
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);
#endif
|
