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}

 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}