* Copyright (C) 2002 Red Hat, Inc.
*/
+#include <linux/moduleparam.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/string.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <asm/unaligned.h>
+#include <trace/events/napi.h>
/*
* We maintain a small pool of fully-sized skbs, to make sure the
static void zap_completion_queue(void);
static void arp_reply(struct sk_buff *skb);
+static unsigned int carrier_timeout = 4;
+module_param(carrier_timeout, uint, 0644);
+
static void queue_process(struct work_struct *work)
{
struct netpoll_info *npinfo =
while ((skb = skb_dequeue(&npinfo->txq))) {
struct net_device *dev = skb->dev;
+ const struct net_device_ops *ops = dev->netdev_ops;
+ struct netdev_queue *txq;
if (!netif_device_present(dev) || !netif_running(dev)) {
__kfree_skb(skb);
continue;
}
+ txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
+
local_irq_save(flags);
- netif_tx_lock(dev);
- if ((netif_queue_stopped(dev) ||
- netif_subqueue_stopped(dev, skb)) ||
- dev->hard_start_xmit(skb, dev) != NETDEV_TX_OK) {
+ __netif_tx_lock(txq, smp_processor_id());
+ if (netif_tx_queue_stopped(txq) ||
+ netif_tx_queue_frozen(txq) ||
+ ops->ndo_start_xmit(skb, dev) != NETDEV_TX_OK) {
skb_queue_head(&npinfo->txq, skb);
- netif_tx_unlock(dev);
+ __netif_tx_unlock(txq);
local_irq_restore(flags);
schedule_delayed_work(&npinfo->tx_work, HZ/10);
return;
}
- netif_tx_unlock(dev);
+ __netif_tx_unlock(txq);
local_irq_restore(flags);
}
}
npinfo->rx_flags |= NETPOLL_RX_DROP;
atomic_inc(&trapped);
+ set_bit(NAPI_STATE_NPSVC, &napi->state);
work = napi->poll(napi, budget);
+ trace_napi_poll(napi);
+ clear_bit(NAPI_STATE_NPSVC, &napi->state);
atomic_dec(&trapped);
npinfo->rx_flags &= ~NETPOLL_RX_DROP;
void netpoll_poll(struct netpoll *np)
{
struct net_device *dev = np->dev;
+ const struct net_device_ops *ops;
+
+ if (!dev || !netif_running(dev))
+ return;
- if (!dev || !netif_running(dev) || !dev->poll_controller)
+ ops = dev->netdev_ops;
+ if (!ops->ndo_poll_controller)
return;
/* Process pending work on NIC */
- dev->poll_controller(dev);
+ ops->ndo_poll_controller(dev);
poll_napi(dev);
while (clist != NULL) {
struct sk_buff *skb = clist;
clist = clist->next;
- if (skb->destructor)
+ if (skb->destructor) {
+ atomic_inc(&skb->users);
dev_kfree_skb_any(skb); /* put this one back */
- else
+ } else {
__kfree_skb(skb);
+ }
}
}
int status = NETDEV_TX_BUSY;
unsigned long tries;
struct net_device *dev = np->dev;
+ const struct net_device_ops *ops = dev->netdev_ops;
struct netpoll_info *npinfo = np->dev->npinfo;
if (!npinfo || !netif_running(dev) || !netif_device_present(dev)) {
/* don't get messages out of order, and no recursion */
if (skb_queue_len(&npinfo->txq) == 0 && !netpoll_owner_active(dev)) {
+ struct netdev_queue *txq;
unsigned long flags;
+ txq = netdev_get_tx_queue(dev, skb_get_queue_mapping(skb));
+
local_irq_save(flags);
/* try until next clock tick */
for (tries = jiffies_to_usecs(1)/USEC_PER_POLL;
tries > 0; --tries) {
- if (netif_tx_trylock(dev)) {
- if (!netif_queue_stopped(dev) &&
- !netif_subqueue_stopped(dev, skb))
- status = dev->hard_start_xmit(skb, dev);
- netif_tx_unlock(dev);
+ if (__netif_tx_trylock(txq)) {
+ if (!netif_tx_queue_stopped(txq)) {
+ status = ops->ndo_start_xmit(skb, dev);
+ if (status == NETDEV_TX_OK)
+ txq_trans_update(txq);
+ }
+ __netif_tx_unlock(txq);
if (status == NETDEV_TX_OK)
break;
udelay(USEC_PER_POLL);
}
+
+ WARN_ONCE(!irqs_disabled(),
+ "netpoll_send_skb(): %s enabled interrupts in poll (%pF)\n",
+ dev->name, ops->ndo_start_xmit);
+
local_irq_restore(flags);
}
udph->dest = htons(np->remote_port);
udph->len = htons(udp_len);
udph->check = 0;
- udph->check = csum_tcpudp_magic(htonl(np->local_ip),
- htonl(np->remote_ip),
+ udph->check = csum_tcpudp_magic(np->local_ip,
+ np->remote_ip,
udp_len, IPPROTO_UDP,
- csum_partial((unsigned char *)udph, udp_len, 0));
+ csum_partial(udph, udp_len, 0));
if (udph->check == 0)
udph->check = CSUM_MANGLED_0;
iph->ttl = 64;
iph->protocol = IPPROTO_UDP;
iph->check = 0;
- put_unaligned(htonl(np->local_ip), &(iph->saddr));
- put_unaligned(htonl(np->remote_ip), &(iph->daddr));
+ put_unaligned(np->local_ip, &(iph->saddr));
+ put_unaligned(np->remote_ip, &(iph->daddr));
iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
skb_reset_mac_header(skb);
skb->protocol = eth->h_proto = htons(ETH_P_IP);
- memcpy(eth->h_source, np->local_mac, 6);
- memcpy(eth->h_dest, np->remote_mac, 6);
+ memcpy(eth->h_source, np->dev->dev_addr, ETH_ALEN);
+ memcpy(eth->h_dest, np->remote_mac, ETH_ALEN);
skb->dev = np->dev;
__be32 sip, tip;
unsigned char *sha;
struct sk_buff *send_skb;
- struct netpoll *np = NULL;
+ struct netpoll *np, *tmp;
+ unsigned long flags;
+ int hits = 0;
+
+ if (list_empty(&npinfo->rx_np))
+ return;
+
+ /* Before checking the packet, we do some early
+ inspection whether this is interesting at all */
+ spin_lock_irqsave(&npinfo->rx_lock, flags);
+ list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
+ if (np->dev == skb->dev)
+ hits++;
+ }
+ spin_unlock_irqrestore(&npinfo->rx_lock, flags);
- if (npinfo->rx_np && npinfo->rx_np->dev == skb->dev)
- np = npinfo->rx_np;
- if (!np)
+ /* No netpoll struct is using this dev */
+ if (!hits)
return;
/* No arp on this interface */
if (skb->dev->flags & IFF_NOARP)
return;
- if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
- (2 * skb->dev->addr_len) +
- (2 * sizeof(u32)))))
+ if (!pskb_may_pull(skb, arp_hdr_len(skb->dev)))
return;
skb_reset_network_header(skb);
arp_ptr += skb->dev->addr_len;
memcpy(&sip, arp_ptr, 4);
arp_ptr += 4;
- /* if we actually cared about dst hw addr, it would get copied here */
+ /* If we actually cared about dst hw addr,
+ it would get copied here */
arp_ptr += skb->dev->addr_len;
memcpy(&tip, arp_ptr, 4);
/* Should we ignore arp? */
- if (tip != htonl(np->local_ip) || LOOPBACK(tip) || MULTICAST(tip))
+ if (ipv4_is_loopback(tip) || ipv4_is_multicast(tip))
return;
- size = sizeof(struct arphdr) + 2 * (skb->dev->addr_len + 4);
- send_skb = find_skb(np, size + LL_RESERVED_SPACE(np->dev),
- LL_RESERVED_SPACE(np->dev));
-
- if (!send_skb)
- return;
+ size = arp_hdr_len(skb->dev);
- skb_reset_network_header(send_skb);
- arp = (struct arphdr *) skb_put(send_skb, size);
- send_skb->dev = skb->dev;
- send_skb->protocol = htons(ETH_P_ARP);
+ spin_lock_irqsave(&npinfo->rx_lock, flags);
+ list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
+ if (tip != np->local_ip)
+ continue;
- /* Fill the device header for the ARP frame */
- if (dev_hard_header(send_skb, skb->dev, ptype,
- sha, np->local_mac,
- send_skb->len) < 0) {
- kfree_skb(send_skb);
- return;
- }
+ send_skb = find_skb(np, size + LL_ALLOCATED_SPACE(np->dev),
+ LL_RESERVED_SPACE(np->dev));
+ if (!send_skb)
+ continue;
- /*
- * Fill out the arp protocol part.
- *
- * we only support ethernet device type,
- * which (according to RFC 1390) should always equal 1 (Ethernet).
- */
+ skb_reset_network_header(send_skb);
+ arp = (struct arphdr *) skb_put(send_skb, size);
+ send_skb->dev = skb->dev;
+ send_skb->protocol = htons(ETH_P_ARP);
- arp->ar_hrd = htons(np->dev->type);
- arp->ar_pro = htons(ETH_P_IP);
- arp->ar_hln = np->dev->addr_len;
- arp->ar_pln = 4;
- arp->ar_op = htons(type);
+ /* Fill the device header for the ARP frame */
+ if (dev_hard_header(send_skb, skb->dev, ptype,
+ sha, np->dev->dev_addr,
+ send_skb->len) < 0) {
+ kfree_skb(send_skb);
+ continue;
+ }
- arp_ptr=(unsigned char *)(arp + 1);
- memcpy(arp_ptr, np->dev->dev_addr, np->dev->addr_len);
- arp_ptr += np->dev->addr_len;
- memcpy(arp_ptr, &tip, 4);
- arp_ptr += 4;
- memcpy(arp_ptr, sha, np->dev->addr_len);
- arp_ptr += np->dev->addr_len;
- memcpy(arp_ptr, &sip, 4);
+ /*
+ * Fill out the arp protocol part.
+ *
+ * we only support ethernet device type,
+ * which (according to RFC 1390) should
+ * always equal 1 (Ethernet).
+ */
- netpoll_send_skb(np, send_skb);
+ arp->ar_hrd = htons(np->dev->type);
+ arp->ar_pro = htons(ETH_P_IP);
+ arp->ar_hln = np->dev->addr_len;
+ arp->ar_pln = 4;
+ arp->ar_op = htons(type);
+
+ arp_ptr = (unsigned char *)(arp + 1);
+ memcpy(arp_ptr, np->dev->dev_addr, np->dev->addr_len);
+ arp_ptr += np->dev->addr_len;
+ memcpy(arp_ptr, &tip, 4);
+ arp_ptr += 4;
+ memcpy(arp_ptr, sha, np->dev->addr_len);
+ arp_ptr += np->dev->addr_len;
+ memcpy(arp_ptr, &sip, 4);
+
+ netpoll_send_skb(np, send_skb);
+
+ /* If there are several rx_hooks for the same address,
+ we're fine by sending a single reply */
+ break;
+ }
+ spin_unlock_irqrestore(&npinfo->rx_lock, flags);
}
int __netpoll_rx(struct sk_buff *skb)
{
int proto, len, ulen;
+ int hits = 0;
struct iphdr *iph;
struct udphdr *uh;
- struct netpoll_info *npi = skb->dev->npinfo;
- struct netpoll *np = npi->rx_np;
+ struct netpoll_info *npinfo = skb->dev->npinfo;
+ struct netpoll *np, *tmp;
- if (!np)
+ if (list_empty(&npinfo->rx_np))
goto out;
+
if (skb->dev->type != ARPHRD_ETHER)
goto out;
/* check if netpoll clients need ARP */
if (skb->protocol == htons(ETH_P_ARP) &&
atomic_read(&trapped)) {
- skb_queue_tail(&npi->arp_tx, skb);
+ skb_queue_tail(&npinfo->arp_tx, skb);
return 1;
}
goto out;
if (checksum_udp(skb, uh, ulen, iph->saddr, iph->daddr))
goto out;
- if (np->local_ip && np->local_ip != ntohl(iph->daddr))
- goto out;
- if (np->remote_ip && np->remote_ip != ntohl(iph->saddr))
- goto out;
- if (np->local_port && np->local_port != ntohs(uh->dest))
- goto out;
- np->rx_hook(np, ntohs(uh->source),
- (char *)(uh+1),
- ulen - sizeof(struct udphdr));
+ list_for_each_entry_safe(np, tmp, &npinfo->rx_np, rx) {
+ if (np->local_ip && np->local_ip != iph->daddr)
+ continue;
+ if (np->remote_ip && np->remote_ip != iph->saddr)
+ continue;
+ if (np->local_port && np->local_port != ntohs(uh->dest))
+ continue;
+
+ np->rx_hook(np, ntohs(uh->source),
+ (char *)(uh+1),
+ ulen - sizeof(struct udphdr));
+ hits++;
+ }
+
+ if (!hits)
+ goto out;
kfree_skb(skb);
return 1;
void netpoll_print_options(struct netpoll *np)
{
- DECLARE_MAC_BUF(mac);
printk(KERN_INFO "%s: local port %d\n",
np->name, np->local_port);
- printk(KERN_INFO "%s: local IP %d.%d.%d.%d\n",
- np->name, HIPQUAD(np->local_ip));
- printk(KERN_INFO "%s: interface %s\n",
+ printk(KERN_INFO "%s: local IP %pI4\n",
+ np->name, &np->local_ip);
+ printk(KERN_INFO "%s: interface '%s'\n",
np->name, np->dev_name);
printk(KERN_INFO "%s: remote port %d\n",
np->name, np->remote_port);
- printk(KERN_INFO "%s: remote IP %d.%d.%d.%d\n",
- np->name, HIPQUAD(np->remote_ip));
- printk(KERN_INFO "%s: remote ethernet address %s\n",
- np->name, print_mac(mac, np->remote_mac));
+ printk(KERN_INFO "%s: remote IP %pI4\n",
+ np->name, &np->remote_ip);
+ printk(KERN_INFO "%s: remote ethernet address %pM\n",
+ np->name, np->remote_mac);
}
int netpoll_parse_options(struct netpoll *np, char *opt)
if ((delim = strchr(cur, '/')) == NULL)
goto parse_failed;
*delim = 0;
- np->local_ip = ntohl(in_aton(cur));
+ np->local_ip = in_aton(cur);
cur = delim;
}
cur++;
if ((delim = strchr(cur, '@')) == NULL)
goto parse_failed;
*delim = 0;
+ if (*cur == ' ' || *cur == '\t')
+ printk(KERN_INFO "%s: warning: whitespace"
+ "is not allowed\n", np->name);
np->remote_port = simple_strtol(cur, NULL, 10);
cur = delim;
}
if ((delim = strchr(cur, '/')) == NULL)
goto parse_failed;
*delim = 0;
- np->remote_ip = ntohl(in_aton(cur));
+ np->remote_ip = in_aton(cur);
cur = delim + 1;
if (*cur != 0) {
return 0;
parse_failed:
- printk(KERN_INFO "%s: couldn't parse config at %s!\n",
+ printk(KERN_INFO "%s: couldn't parse config at '%s'!\n",
np->name, cur);
return -1;
}
struct net_device *ndev = NULL;
struct in_device *in_dev;
struct netpoll_info *npinfo;
+ struct netpoll *npe, *tmp;
unsigned long flags;
int err;
npinfo = kmalloc(sizeof(*npinfo), GFP_KERNEL);
if (!npinfo) {
err = -ENOMEM;
- goto release;
+ goto put;
}
npinfo->rx_flags = 0;
- npinfo->rx_np = NULL;
+ INIT_LIST_HEAD(&npinfo->rx_np);
spin_lock_init(&npinfo->rx_lock);
skb_queue_head_init(&npinfo->arp_tx);
atomic_inc(&npinfo->refcnt);
}
- if (!ndev->poll_controller) {
+ if (!ndev->netdev_ops->ndo_poll_controller) {
printk(KERN_ERR "%s: %s doesn't support polling, aborting.\n",
np->name, np->dev_name);
err = -ENOTSUPP;
}
atleast = jiffies + HZ/10;
- atmost = jiffies + 4*HZ;
+ atmost = jiffies + carrier_timeout * HZ;
while (!netif_carrier_ok(ndev)) {
if (time_after(jiffies, atmost)) {
printk(KERN_NOTICE
np->name);
break;
}
- cond_resched();
+ msleep(1);
}
/* If carrier appears to come up instantly, we don't
}
}
- if (is_zero_ether_addr(np->local_mac) && ndev->dev_addr)
- memcpy(np->local_mac, ndev->dev_addr, 6);
-
if (!np->local_ip) {
rcu_read_lock();
in_dev = __in_dev_get_rcu(ndev);
goto release;
}
- np->local_ip = ntohl(in_dev->ifa_list->ifa_local);
+ np->local_ip = in_dev->ifa_list->ifa_local;
rcu_read_unlock();
- printk(KERN_INFO "%s: local IP %d.%d.%d.%d\n",
- np->name, HIPQUAD(np->local_ip));
+ printk(KERN_INFO "%s: local IP %pI4\n", np->name, &np->local_ip);
}
if (np->rx_hook) {
spin_lock_irqsave(&npinfo->rx_lock, flags);
npinfo->rx_flags |= NETPOLL_RX_ENABLED;
- npinfo->rx_np = np;
+ list_add_tail(&np->rx, &npinfo->rx_np);
spin_unlock_irqrestore(&npinfo->rx_lock, flags);
}
return 0;
release:
- if (!ndev->npinfo)
+ if (!ndev->npinfo) {
+ spin_lock_irqsave(&npinfo->rx_lock, flags);
+ list_for_each_entry_safe(npe, tmp, &npinfo->rx_np, rx) {
+ npe->dev = NULL;
+ }
+ spin_unlock_irqrestore(&npinfo->rx_lock, flags);
+
kfree(npinfo);
- np->dev = NULL;
+ }
+put:
dev_put(ndev);
return err;
}
if (np->dev) {
npinfo = np->dev->npinfo;
if (npinfo) {
- if (npinfo->rx_np == np) {
+ if (!list_empty(&npinfo->rx_np)) {
spin_lock_irqsave(&npinfo->rx_lock, flags);
- npinfo->rx_np = NULL;
- npinfo->rx_flags &= ~NETPOLL_RX_ENABLED;
+ list_del(&np->rx);
+ if (list_empty(&npinfo->rx_np))
+ npinfo->rx_flags &= ~NETPOLL_RX_ENABLED;
spin_unlock_irqrestore(&npinfo->rx_lock, flags);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff