Commit | Line | Data |
---|---|---|
c30dbb9c | 1 | |
3d14c5d2 | 2 | #include <linux/ceph/ceph_debug.h> |
5a0e3ad6 | 3 | |
3d14c5d2 | 4 | #include <linux/module.h> |
5a0e3ad6 TH |
5 | #include <linux/slab.h> |
6 | ||
3d14c5d2 YS |
7 | #include <linux/ceph/buffer.h> |
8 | #include <linux/ceph/decode.h> | |
4965fc38 | 9 | #include <linux/ceph/libceph.h> /* for ceph_kvmalloc */ |
c30dbb9c | 10 | |
b6c1d5b8 | 11 | struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp) |
c30dbb9c SW |
12 | { |
13 | struct ceph_buffer *b; | |
14 | ||
15 | b = kmalloc(sizeof(*b), gfp); | |
16 | if (!b) | |
17 | return NULL; | |
b6c1d5b8 | 18 | |
eeb0bed5 ID |
19 | b->vec.iov_base = ceph_kvmalloc(len, gfp); |
20 | if (!b->vec.iov_base) { | |
21 | kfree(b); | |
22 | return NULL; | |
b6c1d5b8 SW |
23 | } |
24 | ||
dd26d857 | 25 | kref_init(&b->kref); |
b6c1d5b8 SW |
26 | b->alloc_len = len; |
27 | b->vec.iov_len = len; | |
28 | dout("buffer_new %p\n", b); | |
c30dbb9c SW |
29 | return b; |
30 | } | |
3d14c5d2 | 31 | EXPORT_SYMBOL(ceph_buffer_new); |
c30dbb9c | 32 | |
dd26d857 SW |
33 | void ceph_buffer_release(struct kref *kref) |
34 | { | |
35 | struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref); | |
b6c1d5b8 SW |
36 | |
37 | dout("buffer_release %p\n", b); | |
4965fc38 | 38 | kvfree(b->vec.iov_base); |
dd26d857 SW |
39 | kfree(b); |
40 | } | |
3d14c5d2 | 41 | EXPORT_SYMBOL(ceph_buffer_release); |
dd26d857 | 42 | |
c7e337d6 SW |
43 | int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end) |
44 | { | |
45 | size_t len; | |
46 | ||
47 | ceph_decode_need(p, end, sizeof(u32), bad); | |
48 | len = ceph_decode_32(p); | |
49 | dout("decode_buffer len %d\n", (int)len); | |
50 | ceph_decode_need(p, end, len, bad); | |
51 | *b = ceph_buffer_new(len, GFP_NOFS); | |
52 | if (!*b) | |
53 | return -ENOMEM; | |
54 | ceph_decode_copy(p, (*b)->vec.iov_base, len); | |
55 | return 0; | |
56 | bad: | |
57 | return -EINVAL; | |
58 | } |