1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright 2010 Cisco Systems, Inc. All rights reserved.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * This program is free software; you may redistribute it and/or modify
5*4882a593Smuzhiyun * it under the terms of the GNU General Public License as published by
6*4882a593Smuzhiyun * the Free Software Foundation; version 2 of the License.
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
9*4882a593Smuzhiyun * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
10*4882a593Smuzhiyun * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
11*4882a593Smuzhiyun * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
12*4882a593Smuzhiyun * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
13*4882a593Smuzhiyun * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
14*4882a593Smuzhiyun * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
15*4882a593Smuzhiyun * SOFTWARE.
16*4882a593Smuzhiyun *
17*4882a593Smuzhiyun */
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #include <linux/kernel.h>
20*4882a593Smuzhiyun #include <linux/errno.h>
21*4882a593Smuzhiyun #include <linux/types.h>
22*4882a593Smuzhiyun #include <linux/slab.h>
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #include "vnic_vic.h"
25*4882a593Smuzhiyun
vic_provinfo_alloc(gfp_t flags,const u8 * oui,const u8 type)26*4882a593Smuzhiyun struct vic_provinfo *vic_provinfo_alloc(gfp_t flags, const u8 *oui,
27*4882a593Smuzhiyun const u8 type)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun struct vic_provinfo *vp;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun if (!oui)
32*4882a593Smuzhiyun return NULL;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun vp = kzalloc(VIC_PROVINFO_MAX_DATA, flags);
35*4882a593Smuzhiyun if (!vp)
36*4882a593Smuzhiyun return NULL;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun memcpy(vp->oui, oui, sizeof(vp->oui));
39*4882a593Smuzhiyun vp->type = type;
40*4882a593Smuzhiyun vp->length = htonl(sizeof(vp->num_tlvs));
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun return vp;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
vic_provinfo_free(struct vic_provinfo * vp)45*4882a593Smuzhiyun void vic_provinfo_free(struct vic_provinfo *vp)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun kfree(vp);
48*4882a593Smuzhiyun }
49*4882a593Smuzhiyun
vic_provinfo_add_tlv(struct vic_provinfo * vp,u16 type,u16 length,const void * value)50*4882a593Smuzhiyun int vic_provinfo_add_tlv(struct vic_provinfo *vp, u16 type, u16 length,
51*4882a593Smuzhiyun const void *value)
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun struct vic_provinfo_tlv *tlv;
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun if (!vp || !value)
56*4882a593Smuzhiyun return -EINVAL;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun if (ntohl(vp->length) + offsetof(struct vic_provinfo_tlv, value) +
59*4882a593Smuzhiyun length > VIC_PROVINFO_MAX_TLV_DATA)
60*4882a593Smuzhiyun return -ENOMEM;
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun tlv = (struct vic_provinfo_tlv *)((u8 *)vp->tlv +
63*4882a593Smuzhiyun ntohl(vp->length) - sizeof(vp->num_tlvs));
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun tlv->type = htons(type);
66*4882a593Smuzhiyun tlv->length = htons(length);
67*4882a593Smuzhiyun memcpy(tlv->value, value, length);
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun vp->num_tlvs = htonl(ntohl(vp->num_tlvs) + 1);
70*4882a593Smuzhiyun vp->length = htonl(ntohl(vp->length) +
71*4882a593Smuzhiyun offsetof(struct vic_provinfo_tlv, value) + length);
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun return 0;
74*4882a593Smuzhiyun }
75*4882a593Smuzhiyun
vic_provinfo_size(struct vic_provinfo * vp)76*4882a593Smuzhiyun size_t vic_provinfo_size(struct vic_provinfo *vp)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun return vp ? ntohl(vp->length) + sizeof(*vp) - sizeof(vp->num_tlvs) : 0;
79*4882a593Smuzhiyun }
80