cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

vnic_vic.c (2047B)

      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}