[net-next-2.6.git] / drivers / net / enic / vnic_vic.c

/*
 * Copyright 2010 Cisco Systems, Inc.  All rights reserved.
 *
 * This program is free software; you may redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/slab.h>

#include "vnic_vic.h"

struct vic_provinfo *vic_provinfo_alloc(gfp_t flags, u8 *oui, u8 type)
{
	struct vic_provinfo *vp;

	if (!oui)
		return NULL;

	vp = kzalloc(VIC_PROVINFO_MAX_DATA, flags);
	if (!vp)
		return NULL;

	memcpy(vp->oui, oui, sizeof(vp->oui));
	vp->type = type;
	vp->length = htonl(sizeof(vp->num_tlvs));

	return vp;
}

void vic_provinfo_free(struct vic_provinfo *vp)
{
	kfree(vp);
}

int vic_provinfo_add_tlv(struct vic_provinfo *vp, u16 type, u16 length,
	void *value)
{
	struct vic_provinfo_tlv *tlv;

	if (!vp || !value)
		return -EINVAL;

	if (ntohl(vp->length) + offsetof(struct vic_provinfo_tlv, value) +
		length > VIC_PROVINFO_MAX_TLV_DATA)
		return -ENOMEM;

	tlv = (struct vic_provinfo_tlv *)((u8 *)vp->tlv +
		ntohl(vp->length) - sizeof(vp->num_tlvs));

	tlv->type = htons(type);
	tlv->length = htons(length);
	memcpy(tlv->value, value, length);

	vp->num_tlvs = htonl(ntohl(vp->num_tlvs) + 1);
	vp->length = htonl(ntohl(vp->length) +
		offsetof(struct vic_provinfo_tlv, value) + length);

	return 0;
}

size_t vic_provinfo_size(struct vic_provinfo *vp)
{
	return vp ?  ntohl(vp->length) + sizeof(*vp) - sizeof(vp->num_tlvs) : 0;
}
Commit	Line	Data
f8bd9091 SF	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
	26	struct vic_provinfo vic_provinfo_alloc(gfp_t flags, u8 oui, u8 type)
	27	{
fc0ba8e8	28	struct vic_provinfo *vp;
f8bd9091	29
29046f9b VK	30	if (!oui)
	31	return NULL;
	32
fc0ba8e8 DC	33	vp = kzalloc(VIC_PROVINFO_MAX_DATA, flags);
fc0ba8e8 DC	34	if (!vp)
f8bd9091 SF	35	return NULL;
	36
	37	memcpy(vp->oui, oui, sizeof(vp->oui));
	38	vp->type = type;
	39	vp->length = htonl(sizeof(vp->num_tlvs));
	40
	41	return vp;
	42	}
	43
	44	void vic_provinfo_free(struct vic_provinfo *vp)
	45	{
	46	kfree(vp);
	47	}
	48
	49	int vic_provinfo_add_tlv(struct vic_provinfo *vp, u16 type, u16 length,
	50	void *value)
	51	{
	52	struct vic_provinfo_tlv *tlv;
	53
	54	if (!vp \|\| !value)
	55	return -EINVAL;
	56
7c46835e RP	57	if (ntohl(vp->length) + offsetof(struct vic_provinfo_tlv, value) +
7c46835e RP	58	length > VIC_PROVINFO_MAX_TLV_DATA)
f8bd9091 SF	59	return -ENOMEM;
	60
	61	tlv = (struct vic_provinfo_tlv )((u8 )vp->tlv +
	62	ntohl(vp->length) - sizeof(vp->num_tlvs));
	63
	64	tlv->type = htons(type);
	65	tlv->length = htons(length);
	66	memcpy(tlv->value, value, length);
	67
	68	vp->num_tlvs = htonl(ntohl(vp->num_tlvs) + 1);
7c46835e RP	69	vp->length = htonl(ntohl(vp->length) +
7c46835e RP	70	offsetof(struct vic_provinfo_tlv, value) + length);
f8bd9091 SF	71
	72	return 0;
	73	}
	74
	75	size_t vic_provinfo_size(struct vic_provinfo *vp)
	76	{
	77	return vp ? ntohl(vp->length) + sizeof(*vp) - sizeof(vp->num_tlvs) : 0;
	78	}