1 /* Copyright (c) 2004 Coraid, Inc. See COPYING for GPL terms. */
4 * Ethernet portion of AoE driver
7 #include <linux/hdreg.h>
8 #include <linux/blkdev.h>
9 #include <linux/netdevice.h>
10 #include <linux/moduleparam.h>
15 static char *aoe_errlist[] =
18 "unrecognized command code",
19 "bad argument parameter",
21 "config string present",
29 static char aoe_iflist[IFLISTSZ];
30 module_param_string(aoe_iflist, aoe_iflist, IFLISTSZ, 0600);
31 MODULE_PARM_DESC(aoe_iflist, "aoe_iflist=\"dev1 [dev2 ...]\"\n");
34 static int __init aoe_iflist_setup(char *str)
36 strncpy(aoe_iflist, str, IFLISTSZ);
37 aoe_iflist[IFLISTSZ - 1] = '\0';
41 __setup("aoe_iflist=", aoe_iflist_setup);
45 is_aoe_netif(struct net_device *ifp)
50 if (aoe_iflist[0] == '\0')
53 p = aoe_iflist + strspn(aoe_iflist, WHITESPACE);
54 for (; *p; p = q + strspn(q, WHITESPACE)) {
55 q = p + strcspn(p, WHITESPACE);
59 len = strlen(p); /* last token in aoe_iflist */
61 if (strlen(ifp->name) == len && !strncmp(ifp->name, p, len))
71 set_aoe_iflist(const char __user *user_str, size_t size)
76 if (copy_from_user(aoe_iflist, user_str, size)) {
77 printk(KERN_INFO "aoe: %s: copy from user failed\n", __FUNCTION__);
80 aoe_iflist[size] = 0x00;
85 mac_addr(char addr[6])
88 char *p = (char *) &n;
90 memcpy(p + 2, addr, 6); /* (sizeof addr != 6) */
92 return __be64_to_cpu(n);
95 static struct sk_buff *
96 skb_check(struct sk_buff *skb)
98 if (skb_is_nonlinear(skb))
99 if ((skb = skb_share_check(skb, GFP_ATOMIC)))
100 if (skb_linearize(skb, GFP_ATOMIC) < 0) {
108 aoenet_xmit(struct sk_buff *sl)
114 skb->next = skb->prev = NULL;
120 * (1) len doesn't include the header by default. I want this.
123 aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt, struct net_device *orig_dev)
128 skb = skb_check(skb);
132 if (!is_aoe_netif(ifp))
135 //skb->len += ETH_HLEN; /* (1) */
136 skb_push(skb, ETH_HLEN); /* (1) */
138 h = (struct aoe_hdr *) skb->mac.raw;
139 n = be32_to_cpu(h->tag);
140 if ((h->verfl & AOEFL_RSP) == 0 || (n & 1<<31))
143 if (h->verfl & AOEFL_ERR) {
148 printk(KERN_ERR "aoe: aoenet_rcv: error packet from %d.%d; "
150 be16_to_cpu(h->major), h->minor,
151 h->err, aoe_errlist[n]);
163 printk(KERN_INFO "aoe: aoenet_rcv: unknown cmd %d\n", h->cmd);
170 static struct packet_type aoe_pt = {
171 .type = __constant_htons(ETH_P_AOE),
178 dev_add_pack(&aoe_pt);
185 dev_remove_pack(&aoe_pt);