/* some callers cannot sleep, and they can call this function,
* transmitting the packets later, when interrupts are on
*/
static struct sk_buff *
aoecmd_cfg_pkts(ushort aoemajor, unsigned char aoeminor, struct sk_buff **tail)
{
struct aoe_hdr *h;
struct aoe_cfghdr *ch;
struct sk_buff *skb, *sl, *sl_tail;
struct net_device *ifp;
sl = sl_tail = NULL;
read_lock(&dev_base_lock);
for_each_netdev(ifp) {
dev_hold(ifp);
if (!is_aoe_netif(ifp))
goto cont;
skb = new_skb(sizeof *h + sizeof *ch);
if (skb == NULL) {
printk(KERN_INFO "aoe: skb alloc failure\n");
goto cont;
}
skb_put(skb, sizeof *h + sizeof *ch);
skb->dev = ifp;
if (sl_tail == NULL)
sl_tail = skb;
h = aoe_hdr(skb);
memset(h, 0, sizeof *h + sizeof *ch);
memset(h->dst, 0xff, sizeof h->dst);
memcpy(h->src, ifp->dev_addr, sizeof h->src);
h->type = __constant_cpu_to_be16(ETH_P_AOE);
h->verfl = AOE_HVER;
h->major = cpu_to_be16(aoemajor);
h->minor = aoeminor;
h->cmd = AOECMD_CFG;
skb->next = sl;
sl = skb;
cont:
dev_put(ifp);
}
read_unlock(&dev_base_lock);
if (tail != NULL)
*tail = sl_tail;
return sl;
}
static struct sk_buff *
skb_prepare(struct aoedev *d, struct frame *f)
{
struct sk_buff *skb;
char *p;
skb = new_skb(d->ifp, f->ndata + f->writedatalen);
if (!skb) {
printk(KERN_INFO "aoe: skb_prepare: failure to allocate skb\n");
return NULL;
}
p = skb->mac.raw;
memcpy(p, f->data, f->ndata);
if (f->writedatalen) {
p += sizeof(struct aoe_hdr) + sizeof(struct aoe_atahdr);
memcpy(p, f->bufaddr, f->writedatalen);
}
return skb;
}