1// SPDX-License-Identifier: GPL-2.0
 2
 3#include <linux/ceph/ceph_debug.h>
 4
 5#include <linux/module.h>
 6#include <linux/slab.h>
 7
 8#include <linux/ceph/buffer.h>
 9#include <linux/ceph/decode.h>
10#include <linux/ceph/libceph.h> /* for ceph_kvmalloc */
11
12struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
13{
14	struct ceph_buffer *b;
15
16	b = kmalloc(sizeof(*b), gfp);
17	if (!b)
18		return NULL;
19
20	b->vec.iov_base = ceph_kvmalloc(len, gfp);
21	if (!b->vec.iov_base) {
22		kfree(b);
23		return NULL;
24	}
25
26	kref_init(&b->kref);
27	b->alloc_len = len;
28	b->vec.iov_len = len;
29	dout("buffer_new %p\n", b);
30	return b;
31}
32EXPORT_SYMBOL(ceph_buffer_new);
33
34void ceph_buffer_release(struct kref *kref)
35{
36	struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
37
38	dout("buffer_release %p\n", b);
39	kvfree(b->vec.iov_base);
40	kfree(b);
41}
42EXPORT_SYMBOL(ceph_buffer_release);
43
44int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end)
45{
46	size_t len;
47
48	ceph_decode_need(p, end, sizeof(u32), bad);
49	len = ceph_decode_32(p);
50	dout("decode_buffer len %d\n", (int)len);
51	ceph_decode_need(p, end, len, bad);
52	*b = ceph_buffer_new(len, GFP_NOFS);
53	if (!*b)
54		return -ENOMEM;
55	ceph_decode_copy(p, (*b)->vec.iov_base, len);
56	return 0;
57bad:
58	return -EINVAL;
59}

 
 1
 2#include <linux/ceph/ceph_debug.h>
 3
 4#include <linux/module.h>
 5#include <linux/slab.h>
 6
 7#include <linux/ceph/buffer.h>
 8#include <linux/ceph/decode.h>
 9#include <linux/ceph/libceph.h> /* for ceph_kvmalloc */
10
11struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
12{
13	struct ceph_buffer *b;
14
15	b = kmalloc(sizeof(*b), gfp);
16	if (!b)
17		return NULL;
18
19	b->vec.iov_base = ceph_kvmalloc(len, gfp);
20	if (!b->vec.iov_base) {
21		kfree(b);
22		return NULL;
23	}
24
25	kref_init(&b->kref);
26	b->alloc_len = len;
27	b->vec.iov_len = len;
28	dout("buffer_new %p\n", b);
29	return b;
30}
31EXPORT_SYMBOL(ceph_buffer_new);
32
33void ceph_buffer_release(struct kref *kref)
34{
35	struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
36
37	dout("buffer_release %p\n", b);
38	kvfree(b->vec.iov_base);
39	kfree(b);
40}
41EXPORT_SYMBOL(ceph_buffer_release);
42
43int 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;
56bad:
57	return -EINVAL;
58}