1// SPDX-License-Identifier: GPL-2.0-only
 2// Copyright 2010 Cisco Systems, Inc.  All rights reserved.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 3
 4#include <linux/kernel.h>
 5#include <linux/errno.h>
 6#include <linux/types.h>
 7#include <linux/slab.h>
 8
 9#include "vnic_vic.h"
10
11struct vic_provinfo *vic_provinfo_alloc(gfp_t flags, const u8 *oui,
12	const u8 type)
13{
14	struct vic_provinfo *vp;
15
16	if (!oui)
17		return NULL;
18
19	vp = kzalloc(VIC_PROVINFO_MAX_DATA, flags);
20	if (!vp)
21		return NULL;
22
23	memcpy(vp->oui, oui, sizeof(vp->oui));
24	vp->type = type;
25	vp->length = htonl(sizeof(vp->num_tlvs));
26
27	return vp;
28}
29
30void vic_provinfo_free(struct vic_provinfo *vp)
31{
32	kfree(vp);
33}
34
35int vic_provinfo_add_tlv(struct vic_provinfo *vp, u16 type, u16 length,
36	const void *value)
37{
38	struct vic_provinfo_tlv *tlv;
39
40	if (!vp || !value)
41		return -EINVAL;
42
43	if (ntohl(vp->length) + offsetof(struct vic_provinfo_tlv, value) +
44		length > VIC_PROVINFO_MAX_TLV_DATA)
45		return -ENOMEM;
46
47	tlv = (struct vic_provinfo_tlv *)((u8 *)vp->tlv +
48		ntohl(vp->length) - sizeof(vp->num_tlvs));
49
50	tlv->type = htons(type);
51	tlv->length = htons(length);
52	unsafe_memcpy(tlv->value, value, length,
53		      /* Flexible array of flexible arrays */);
54
55	vp->num_tlvs = htonl(ntohl(vp->num_tlvs) + 1);
56	vp->length = htonl(ntohl(vp->length) +
57		offsetof(struct vic_provinfo_tlv, value) + length);
58
59	return 0;
60}
61
62size_t vic_provinfo_size(struct vic_provinfo *vp)
63{
64	return vp ?  ntohl(vp->length) + sizeof(*vp) - sizeof(vp->num_tlvs) : 0;
65}

 1/*
 2 * Copyright 2010 Cisco Systems, Inc.  All rights reserved.
 3 *
 4 * This program is free software; you may redistribute it and/or modify
 5 * it under the terms of the GNU General Public License as published by
 6 * the Free Software Foundation; version 2 of the License.
 7 *
 8 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 9 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15 * SOFTWARE.
16 *
17 */
18
19#include <linux/kernel.h>
20#include <linux/errno.h>
21#include <linux/types.h>
22#include <linux/slab.h>
23
24#include "vnic_vic.h"
25
26struct vic_provinfo *vic_provinfo_alloc(gfp_t flags, const u8 *oui,
27	const u8 type)
28{
29	struct vic_provinfo *vp;
30
31	if (!oui)
32		return NULL;
33
34	vp = kzalloc(VIC_PROVINFO_MAX_DATA, flags);
35	if (!vp)
36		return NULL;
37
38	memcpy(vp->oui, oui, sizeof(vp->oui));
39	vp->type = type;
40	vp->length = htonl(sizeof(vp->num_tlvs));
41
42	return vp;
43}
44
45void vic_provinfo_free(struct vic_provinfo *vp)
46{
47	kfree(vp);
48}
49
50int vic_provinfo_add_tlv(struct vic_provinfo *vp, u16 type, u16 length,
51	const void *value)
52{
53	struct vic_provinfo_tlv *tlv;
54
55	if (!vp || !value)
56		return -EINVAL;
57
58	if (ntohl(vp->length) + offsetof(struct vic_provinfo_tlv, value) +
59		length > VIC_PROVINFO_MAX_TLV_DATA)
60		return -ENOMEM;
61
62	tlv = (struct vic_provinfo_tlv *)((u8 *)vp->tlv +
63		ntohl(vp->length) - sizeof(vp->num_tlvs));
64
65	tlv->type = htons(type);
66	tlv->length = htons(length);
67	memcpy(tlv->value, value, length);
 
68
69	vp->num_tlvs = htonl(ntohl(vp->num_tlvs) + 1);
70	vp->length = htonl(ntohl(vp->length) +
71		offsetof(struct vic_provinfo_tlv, value) + length);
72
73	return 0;
74}
75
76size_t vic_provinfo_size(struct vic_provinfo *vp)
77{
78	return vp ?  ntohl(vp->length) + sizeof(*vp) - sizeof(vp->num_tlvs) : 0;
79}