1 | /* SPDX-License-Identifier: GPL-2.0 */ |
---|---|
2 | #ifndef __FS_CEPH_BUFFER_H |
3 | #define __FS_CEPH_BUFFER_H |
4 | |
5 | #include <linux/kref.h> |
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 | * |
14 | * use kmalloc for smaller sizes, vmalloc for larger sizes. |
15 | */ |
16 | struct ceph_buffer { |
17 | struct kref kref; |
18 | struct kvec vec; |
19 | size_t alloc_len; |
20 | }; |
21 | |
22 | extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp); |
23 | extern void ceph_buffer_release(struct kref *kref); |
24 | |
25 | static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b) |
26 | { |
27 | kref_get(kref: &b->kref); |
28 | return b; |
29 | } |
30 | |
31 | static inline void ceph_buffer_put(struct ceph_buffer *b) |
32 | { |
33 | if (b) |
34 | kref_put(kref: &b->kref, release: ceph_buffer_release); |
35 | } |
36 | |
37 | extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end); |
38 | |
39 | #endif |
40 |