Commit | Line | Data |
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c30dbb9c SW |
1 | #ifndef __FS_CEPH_BUFFER_H |
2 | #define __FS_CEPH_BUFFER_H | |
3 | ||
dd26d857 | 4 | #include <linux/kref.h> |
c30dbb9c SW |
5 | #include <linux/mm.h> |
6 | #include <linux/vmalloc.h> | |
7 | #include <linux/types.h> | |
8 | #include <linux/uio.h> | |
9 | ||
10 | /* | |
11 | * a simple reference counted buffer. | |
12 | * | |
13 | * use kmalloc for small sizes (<= one page), vmalloc for larger | |
14 | * sizes. | |
15 | */ | |
16 | struct ceph_buffer { | |
dd26d857 | 17 | struct kref kref; |
c30dbb9c SW |
18 | struct kvec vec; |
19 | size_t alloc_len; | |
20 | bool is_vmalloc; | |
21 | }; | |
22 | ||
b6c1d5b8 SW |
23 | extern struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp); |
24 | extern void ceph_buffer_release(struct kref *kref); | |
c30dbb9c SW |
25 | |
26 | static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b) | |
27 | { | |
dd26d857 | 28 | kref_get(&b->kref); |
c30dbb9c SW |
29 | return b; |
30 | } | |
31 | ||
32 | static inline void ceph_buffer_put(struct ceph_buffer *b) | |
33 | { | |
b6c1d5b8 | 34 | kref_put(&b->kref, ceph_buffer_release); |
c30dbb9c SW |
35 | } |
36 | ||
c7e337d6 SW |
37 | extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end); |
38 | ||
c30dbb9c | 39 | #endif |