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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
c30dbb9c SW |
2 | #ifndef __FS_CEPH_BUFFER_H |
3 | #define __FS_CEPH_BUFFER_H | |
4 | ||
dd26d857 | 5 | #include <linux/kref.h> |
c30dbb9c SW |
6 | #include <linux/mm.h> |
7 | #include <linux/vmalloc.h> | |
8 | #include <linux/types.h> | |
9 | #include <linux/uio.h> | |
10 | ||
11 | /* | |
12 | * a simple reference counted buffer. | |
13 | * | |
4965fc38 | 14 | * use kmalloc for smaller sizes, vmalloc for larger sizes. |
c30dbb9c SW |
15 | */ |
16 | struct ceph_buffer { | |
dd26d857 | 17 | struct kref kref; |
c30dbb9c SW |
18 | struct kvec vec; |
19 | size_t alloc_len; | |
c30dbb9c SW |
20 | }; |
21 | ||
b6c1d5b8 SW |
22 | extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp); |
23 | extern void ceph_buffer_release(struct kref *kref); | |
c30dbb9c SW |
24 | |
25 | static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b) | |
26 | { | |
dd26d857 | 27 | kref_get(&b->kref); |
c30dbb9c SW |
28 | return b; |
29 | } | |
30 | ||
31 | static inline void ceph_buffer_put(struct ceph_buffer *b) | |
32 | { | |
b6c1d5b8 | 33 | kref_put(&b->kref, ceph_buffer_release); |
c30dbb9c SW |
34 | } |
35 | ||
c7e337d6 SW |
36 | extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end); |
37 | ||
c30dbb9c | 38 | #endif |