175 lines
3.1 KiB
C
175 lines
3.1 KiB
C
/* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
|
|
/*
|
|
* aoenet.c
|
|
* Ethernet portion of AoE driver
|
|
*/
|
|
|
|
#include <linux/hdreg.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/moduleparam.h>
|
|
#include "aoe.h"
|
|
|
|
#define NECODES 5
|
|
|
|
static char *aoe_errlist[] =
|
|
{
|
|
"no such error",
|
|
"unrecognized command code",
|
|
"bad argument parameter",
|
|
"device unavailable",
|
|
"config string present",
|
|
"unsupported version"
|
|
};
|
|
|
|
enum {
|
|
IFLISTSZ = 1024,
|
|
};
|
|
|
|
static char aoe_iflist[IFLISTSZ];
|
|
module_param_string(aoe_iflist, aoe_iflist, IFLISTSZ, 0600);
|
|
MODULE_PARM_DESC(aoe_iflist, "aoe_iflist=\"dev1 [dev2 ...]\"\n");
|
|
|
|
#ifndef MODULE
|
|
static int __init aoe_iflist_setup(char *str)
|
|
{
|
|
strncpy(aoe_iflist, str, IFLISTSZ);
|
|
aoe_iflist[IFLISTSZ - 1] = '\0';
|
|
return 1;
|
|
}
|
|
|
|
__setup("aoe_iflist=", aoe_iflist_setup);
|
|
#endif
|
|
|
|
int
|
|
is_aoe_netif(struct net_device *ifp)
|
|
{
|
|
register char *p, *q;
|
|
register int len;
|
|
|
|
if (aoe_iflist[0] == '\0')
|
|
return 1;
|
|
|
|
p = aoe_iflist + strspn(aoe_iflist, WHITESPACE);
|
|
for (; *p; p = q + strspn(q, WHITESPACE)) {
|
|
q = p + strcspn(p, WHITESPACE);
|
|
if (q != p)
|
|
len = q - p;
|
|
else
|
|
len = strlen(p); /* last token in aoe_iflist */
|
|
|
|
if (strlen(ifp->name) == len && !strncmp(ifp->name, p, len))
|
|
return 1;
|
|
if (q == p)
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
set_aoe_iflist(const char __user *user_str, size_t size)
|
|
{
|
|
if (size >= IFLISTSZ)
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(aoe_iflist, user_str, size)) {
|
|
printk(KERN_INFO "aoe: %s: copy from user failed\n", __FUNCTION__);
|
|
return -EFAULT;
|
|
}
|
|
aoe_iflist[size] = 0x00;
|
|
return 0;
|
|
}
|
|
|
|
u64
|
|
mac_addr(char addr[6])
|
|
{
|
|
__be64 n = 0;
|
|
char *p = (char *) &n;
|
|
|
|
memcpy(p + 2, addr, 6); /* (sizeof addr != 6) */
|
|
|
|
return __be64_to_cpu(n);
|
|
}
|
|
|
|
void
|
|
aoenet_xmit(struct sk_buff *sl)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
while ((skb = sl)) {
|
|
sl = sl->next;
|
|
skb->next = skb->prev = NULL;
|
|
dev_queue_xmit(skb);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* (1) len doesn't include the header by default. I want this.
|
|
*/
|
|
static int
|
|
aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt, struct net_device *orig_dev)
|
|
{
|
|
struct aoe_hdr *h;
|
|
u32 n;
|
|
|
|
skb = skb_share_check(skb, GFP_ATOMIC);
|
|
if (skb == NULL)
|
|
return 0;
|
|
if (skb_linearize(skb))
|
|
goto exit;
|
|
if (!is_aoe_netif(ifp))
|
|
goto exit;
|
|
skb_push(skb, ETH_HLEN); /* (1) */
|
|
|
|
h = (struct aoe_hdr *) skb->mac.raw;
|
|
n = be32_to_cpu(h->tag);
|
|
if ((h->verfl & AOEFL_RSP) == 0 || (n & 1<<31))
|
|
goto exit;
|
|
|
|
if (h->verfl & AOEFL_ERR) {
|
|
n = h->err;
|
|
if (n > NECODES)
|
|
n = 0;
|
|
if (net_ratelimit())
|
|
printk(KERN_ERR "aoe: aoenet_rcv: error packet from %d.%d; "
|
|
"ecode=%d '%s'\n",
|
|
be16_to_cpu(h->major), h->minor,
|
|
h->err, aoe_errlist[n]);
|
|
goto exit;
|
|
}
|
|
|
|
switch (h->cmd) {
|
|
case AOECMD_ATA:
|
|
aoecmd_ata_rsp(skb);
|
|
break;
|
|
case AOECMD_CFG:
|
|
aoecmd_cfg_rsp(skb);
|
|
break;
|
|
default:
|
|
printk(KERN_INFO "aoe: aoenet_rcv: unknown cmd %d\n", h->cmd);
|
|
}
|
|
exit:
|
|
dev_kfree_skb(skb);
|
|
return 0;
|
|
}
|
|
|
|
static struct packet_type aoe_pt = {
|
|
.type = __constant_htons(ETH_P_AOE),
|
|
.func = aoenet_rcv,
|
|
};
|
|
|
|
int __init
|
|
aoenet_init(void)
|
|
{
|
|
dev_add_pack(&aoe_pt);
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
aoenet_exit(void)
|
|
{
|
|
dev_remove_pack(&aoe_pt);
|
|
}
|
|
|