1 /* Copyright (c) 2007 Coraid, Inc. See COPYING for GPL terms. */
4 * Ethernet portion of AoE driver
8 #include <linux/hdreg.h>
9 #include <linux/blkdev.h>
10 #include <linux/netdevice.h>
11 #include <linux/moduleparam.h>
12 #include <net/net_namespace.h>
13 #include <asm/unaligned.h>
18 static char *aoe_errlist[] =
21 "unrecognized command code",
22 "bad argument parameter",
24 "config string present",
32 static char aoe_iflist[IFLISTSZ];
33 module_param_string(aoe_iflist, aoe_iflist, IFLISTSZ, 0600);
34 MODULE_PARM_DESC(aoe_iflist, "aoe_iflist=\"dev1 [dev2 ...]\"");
37 static int __init aoe_iflist_setup(char *str)
39 strncpy(aoe_iflist, str, IFLISTSZ);
40 aoe_iflist[IFLISTSZ - 1] = '\0';
44 __setup("aoe_iflist=", aoe_iflist_setup);
48 is_aoe_netif(struct net_device *ifp)
53 if (aoe_iflist[0] == '\0')
56 p = aoe_iflist + strspn(aoe_iflist, WHITESPACE);
57 for (; *p; p = q + strspn(q, WHITESPACE)) {
58 q = p + strcspn(p, WHITESPACE);
62 len = strlen(p); /* last token in aoe_iflist */
64 if (strlen(ifp->name) == len && !strncmp(ifp->name, p, len))
74 set_aoe_iflist(const char __user *user_str, size_t size)
79 if (copy_from_user(aoe_iflist, user_str, size)) {
80 printk(KERN_INFO "aoe: copy from user failed\n");
83 aoe_iflist[size] = 0x00;
88 aoenet_xmit(struct sk_buff_head *queue)
90 struct sk_buff *skb, *tmp;
92 skb_queue_walk_safe(queue, skb, tmp) {
93 __skb_unlink(skb, queue);
99 * (1) len doesn't include the header by default. I want this.
102 aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt, struct net_device *orig_dev)
107 if (dev_net(ifp) != &init_net)
110 skb = skb_share_check(skb, GFP_ATOMIC);
113 if (skb_linearize(skb))
115 if (!is_aoe_netif(ifp))
117 skb_push(skb, ETH_HLEN); /* (1) */
119 h = (struct aoe_hdr *) skb_mac_header(skb);
120 n = get_unaligned_be32(&h->tag);
121 if ((h->verfl & AOEFL_RSP) == 0 || (n & 1<<31))
124 if (h->verfl & AOEFL_ERR) {
130 "%s%d.%d@%s; ecode=%d '%s'\n",
131 "aoe: error packet from ",
132 get_unaligned_be16(&h->major),
133 h->minor, skb->dev->name,
134 h->err, aoe_errlist[n]);
146 if (h->cmd >= AOECMD_VEND_MIN)
147 break; /* don't complain about vendor commands */
148 printk(KERN_INFO "aoe: unknown cmd %d\n", h->cmd);
155 static struct packet_type aoe_pt __read_mostly = {
156 .type = __constant_htons(ETH_P_AOE),
163 dev_add_pack(&aoe_pt);
170 dev_remove_pack(&aoe_pt);