X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=net%2Fcore%2Fnetpoll.c;h=755414cd49d10c8d65c6366bceb2618edf261f75;hb=350e32907cf72ef82bbe7d72525fa2d9dcf64682;hp=abe6e3a4cc44198e01c12e1054fa7b66ec22134e;hpb=bea3348eef27e6044b6161fd04c3152215f96411;p=safe%2Fjmp%2Flinux-2.6 diff --git a/net/core/netpoll.c b/net/core/netpoll.c index abe6e3a..755414c 100644 --- a/net/core/netpoll.c +++ b/net/core/netpoll.c @@ -58,25 +58,29 @@ static void queue_process(struct work_struct *work) 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->queue_mapping)) || - 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); } } @@ -116,54 +120,72 @@ static __sum16 checksum_udp(struct sk_buff *skb, struct udphdr *uh, * network adapter, forcing superfluous retries and possibly timeouts. * Thus, we set our budget to greater than 1. */ -static void poll_napi(struct netpoll *np) +static int poll_one_napi(struct netpoll_info *npinfo, + struct napi_struct *napi, int budget) +{ + int work; + + /* net_rx_action's ->poll() invocations and our's are + * synchronized by this test which is only made while + * holding the napi->poll_lock. + */ + if (!test_bit(NAPI_STATE_SCHED, &napi->state)) + return budget; + + npinfo->rx_flags |= NETPOLL_RX_DROP; + atomic_inc(&trapped); + set_bit(NAPI_STATE_NPSVC, &napi->state); + + work = napi->poll(napi, budget); + + clear_bit(NAPI_STATE_NPSVC, &napi->state); + atomic_dec(&trapped); + npinfo->rx_flags &= ~NETPOLL_RX_DROP; + + return budget - work; +} + +static void poll_napi(struct net_device *dev) { - struct netpoll_info *npinfo = np->dev->npinfo; struct napi_struct *napi; int budget = 16; - list_for_each_entry(napi, &np->dev->napi_list, dev_list) { - if (test_bit(NAPI_STATE_SCHED, &napi->state) && - napi->poll_owner != smp_processor_id() && + list_for_each_entry(napi, &dev->napi_list, dev_list) { + if (napi->poll_owner != smp_processor_id() && spin_trylock(&napi->poll_lock)) { - npinfo->rx_flags |= NETPOLL_RX_DROP; - atomic_inc(&trapped); - - napi->poll(napi, budget); - - atomic_dec(&trapped); - npinfo->rx_flags &= ~NETPOLL_RX_DROP; + budget = poll_one_napi(dev->npinfo, napi, budget); spin_unlock(&napi->poll_lock); + + if (!budget) + break; } } } static void service_arp_queue(struct netpoll_info *npi) { - struct sk_buff *skb; - - if (unlikely(!npi)) - return; + if (npi) { + struct sk_buff *skb; - skb = skb_dequeue(&npi->arp_tx); - - while (skb != NULL) { - arp_reply(skb); - skb = skb_dequeue(&npi->arp_tx); + while ((skb = skb_dequeue(&npi->arp_tx))) + arp_reply(skb); } } void netpoll_poll(struct netpoll *np) { - if (!np->dev || !netif_running(np->dev) || !np->dev->poll_controller) + struct net_device *dev = np->dev; + const struct net_device_ops *ops = dev->netdev_ops; + + if (!dev || !netif_running(dev) || !ops->ndo_poll_controller) return; /* Process pending work on NIC */ - np->dev->poll_controller(np->dev); - if (!list_empty(&np->dev->napi_list)) - poll_napi(np); + ops->ndo_poll_controller(dev); - service_arp_queue(np->dev->npinfo); + poll_napi(dev); + + service_arp_queue(dev->npinfo); zap_completion_queue(); } @@ -200,10 +222,12 @@ static void zap_completion_queue(void) 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); + } } } @@ -252,6 +276,7 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *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)) { @@ -261,17 +286,19 @@ static void netpoll_send_skb(struct netpoll *np, struct sk_buff *skb) /* 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->queue_mapping)) - 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); + __netif_tx_unlock(txq); if (status == NETDEV_TX_OK) break; @@ -321,7 +348,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len) udph->check = csum_tcpudp_magic(htonl(np->local_ip), htonl(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; @@ -345,8 +372,8 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len) 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; @@ -373,9 +400,7 @@ static void arp_reply(struct sk_buff *skb) 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); @@ -399,11 +424,12 @@ static void arp_reply(struct sk_buff *skb) memcpy(&tip, arp_ptr, 4); /* Should we ignore arp? */ - if (tip != htonl(np->local_ip) || LOOPBACK(tip) || MULTICAST(tip)) + if (tip != htonl(np->local_ip) || + 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), + size = arp_hdr_len(skb->dev); + send_skb = find_skb(np, size + LL_ALLOCATED_SPACE(np->dev), LL_RESERVED_SPACE(np->dev)); if (!send_skb) @@ -415,11 +441,9 @@ static void arp_reply(struct sk_buff *skb) send_skb->protocol = htons(ETH_P_ARP); /* Fill the device header for the ARP frame */ - - if (np->dev->hard_header && - np->dev->hard_header(send_skb, skb->dev, ptype, - sha, np->local_mac, - send_skb->len) < 0) { + if (dev_hard_header(send_skb, skb->dev, ptype, + sha, np->dev->dev_addr, + send_skb->len) < 0) { kfree_skb(send_skb); return; } @@ -532,6 +556,22 @@ out: return 0; } +void netpoll_print_options(struct netpoll *np) +{ + 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", + 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 %pM\n", + np->name, np->remote_mac); +} + int netpoll_parse_options(struct netpoll *np, char *opt) { char *cur=opt, *delim; @@ -544,7 +584,6 @@ int netpoll_parse_options(struct netpoll *np, char *opt) cur = delim; } cur++; - printk(KERN_INFO "%s: local port %d\n", np->name, np->local_port); if (*cur != '/') { if ((delim = strchr(cur, '/')) == NULL) @@ -552,9 +591,6 @@ int netpoll_parse_options(struct netpoll *np, char *opt) *delim = 0; np->local_ip = ntohl(in_aton(cur)); cur = delim; - - printk(KERN_INFO "%s: local IP %d.%d.%d.%d\n", - np->name, HIPQUAD(np->local_ip)); } cur++; @@ -568,8 +604,6 @@ int netpoll_parse_options(struct netpoll *np, char *opt) } cur++; - printk(KERN_INFO "%s: interface %s\n", np->name, np->dev_name); - if (*cur != '@') { /* dst port */ if ((delim = strchr(cur, '@')) == NULL) @@ -579,7 +613,6 @@ int netpoll_parse_options(struct netpoll *np, char *opt) cur = delim; } cur++; - printk(KERN_INFO "%s: remote port %d\n", np->name, np->remote_port); /* dst ip */ if ((delim = strchr(cur, '/')) == NULL) @@ -588,9 +621,6 @@ int netpoll_parse_options(struct netpoll *np, char *opt) np->remote_ip = ntohl(in_aton(cur)); cur = delim + 1; - printk(KERN_INFO "%s: remote IP %d.%d.%d.%d\n", - np->name, HIPQUAD(np->remote_ip)); - if (*cur != 0) { /* MAC address */ if ((delim = strchr(cur, ':')) == NULL) @@ -621,15 +651,7 @@ int netpoll_parse_options(struct netpoll *np, char *opt) np->remote_mac[5] = simple_strtol(cur, NULL, 16); } - printk(KERN_INFO "%s: remote ethernet address " - "%02x:%02x:%02x:%02x:%02x:%02x\n", - np->name, - np->remote_mac[0], - np->remote_mac[1], - np->remote_mac[2], - np->remote_mac[3], - np->remote_mac[4], - np->remote_mac[5]); + netpoll_print_options(np); return 0; @@ -648,7 +670,7 @@ int netpoll_setup(struct netpoll *np) int err; if (np->dev_name) - ndev = dev_get_by_name(np->dev_name); + ndev = dev_get_by_name(&init_net, np->dev_name); if (!ndev) { printk(KERN_ERR "%s: %s doesn't exist, aborting.\n", np->name, np->dev_name); @@ -677,7 +699,7 @@ int netpoll_setup(struct netpoll *np) 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; @@ -725,9 +747,6 @@ int netpoll_setup(struct netpoll *np) } } - 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); @@ -800,11 +819,7 @@ void netpoll_cleanup(struct netpoll *np) cancel_rearming_delayed_work(&npinfo->tx_work); /* clean after last, unfinished work */ - if (!skb_queue_empty(&npinfo->txq)) { - struct sk_buff *skb; - skb = __skb_dequeue(&npinfo->txq); - kfree_skb(skb); - } + __skb_queue_purge(&npinfo->txq); kfree(npinfo); np->dev->npinfo = NULL; } @@ -831,6 +846,7 @@ void netpoll_set_trap(int trap) EXPORT_SYMBOL(netpoll_set_trap); EXPORT_SYMBOL(netpoll_trap); +EXPORT_SYMBOL(netpoll_print_options); EXPORT_SYMBOL(netpoll_parse_options); EXPORT_SYMBOL(netpoll_setup); EXPORT_SYMBOL(netpoll_cleanup);