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1// SPDX-License-Identifier: GPL-2.0-only2// 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}66