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
10struct ceph_buffer *ceph_buffer_new(size_t len, gfp_t gfp)
11{
12	struct ceph_buffer *b;
13
14	b = kmalloc(sizeof(*b), gfp);
15	if (!b)
16		return NULL;
17
18	b->vec.iov_base = kmalloc(len, gfp | __GFP_NOWARN);
19	if (b->vec.iov_base) {
20		b->is_vmalloc = false;
21	} else {
22		b->vec.iov_base = __vmalloc(len, gfp | __GFP_HIGHMEM, PAGE_KERNEL);
23		if (!b->vec.iov_base) {
24			kfree(b);
25			return NULL;
26		}
27		b->is_vmalloc = true;
28	}
29
30	kref_init(&b->kref);
31	b->alloc_len = len;
32	b->vec.iov_len = len;
33	dout("buffer_new %p\n", b);
34	return b;
35}
36EXPORT_SYMBOL(ceph_buffer_new);
37
38void ceph_buffer_release(struct kref *kref)
39{
40	struct ceph_buffer *b = container_of(kref, struct ceph_buffer, kref);
41
42	dout("buffer_release %p\n", b);
43	if (b->vec.iov_base) {
44		if (b->is_vmalloc)
45			vfree(b->vec.iov_base);
46		else
47			kfree(b->vec.iov_base);
48	}
49	kfree(b);
50}
51EXPORT_SYMBOL(ceph_buffer_release);
52
53int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end)
54{
55	size_t len;
56
57	ceph_decode_need(p, end, sizeof(u32), bad);
58	len = ceph_decode_32(p);
59	dout("decode_buffer len %d\n", (int)len);
60	ceph_decode_need(p, end, len, bad);
61	*b = ceph_buffer_new(len, GFP_NOFS);
62	if (!*b)
63		return -ENOMEM;
64	ceph_decode_copy(p, (*b)->vec.iov_base, len);
65	return 0;
66bad:
67	return -EINVAL;
68}