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
vic_provinfo_alloc(gfp_t flags,const u8 * oui,const u8 type)26 struct 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
vic_provinfo_free(struct vic_provinfo * vp)45 void vic_provinfo_free(struct vic_provinfo *vp)
46 {
47 kfree(vp);
48 }
49
vic_provinfo_add_tlv(struct vic_provinfo * vp,u16 type,u16 length,const void * value)50 int 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
vic_provinfo_size(struct vic_provinfo * vp)76 size_t vic_provinfo_size(struct vic_provinfo *vp)
77 {
78 return vp ? ntohl(vp->length) + sizeof(*vp) - sizeof(vp->num_tlvs) : 0;
79 }
80