|
|
@@ -1,1342 +0,0 @@
|
|
|
---- /dev/null
|
|
|
-+++ b/drivers/net/imq.c
|
|
|
-@@ -0,0 +1,638 @@
|
|
|
-+/*
|
|
|
-+ * Pseudo-driver for the intermediate queue device.
|
|
|
-+ *
|
|
|
-+ * This program is free software; you can redistribute it and/or
|
|
|
-+ * modify it under the terms of the GNU General Public License
|
|
|
-+ * as published by the Free Software Foundation; either version
|
|
|
-+ * 2 of the License, or (at your option) any later version.
|
|
|
-+ *
|
|
|
-+ * Authors: Patrick McHardy, <[email protected]>
|
|
|
-+ *
|
|
|
-+ * The first version was written by Martin Devera, <[email protected]>
|
|
|
-+ *
|
|
|
-+ * Credits: Jan Rafaj <[email protected]>
|
|
|
-+ * - Update patch to 2.4.21
|
|
|
-+ * Sebastian Strollo <[email protected]>
|
|
|
-+ * - Fix "Dead-loop on netdevice imq"-issue
|
|
|
-+ * Marcel Sebek <[email protected]>
|
|
|
-+ * - Update to 2.6.2-rc1
|
|
|
-+ *
|
|
|
-+ * After some time of inactivity there is a group taking care
|
|
|
-+ * of IMQ again: http://www.linuximq.net
|
|
|
-+ *
|
|
|
-+ *
|
|
|
-+ * 2004/06/30 - New version of IMQ patch to kernels <=2.6.7
|
|
|
-+ * including the following changes:
|
|
|
-+ *
|
|
|
-+ * - Correction of ipv6 support "+"s issue (Hasso Tepper)
|
|
|
-+ * - Correction of imq_init_devs() issue that resulted in
|
|
|
-+ * kernel OOPS unloading IMQ as module (Norbert Buchmuller)
|
|
|
-+ * - Addition of functionality to choose number of IMQ devices
|
|
|
-+ * during kernel config (Andre Correa)
|
|
|
-+ * - Addition of functionality to choose how IMQ hooks on
|
|
|
-+ * PRE and POSTROUTING (after or before NAT) (Andre Correa)
|
|
|
-+ * - Cosmetic corrections (Norbert Buchmuller) (Andre Correa)
|
|
|
-+ *
|
|
|
-+ *
|
|
|
-+ * 2005/12/16 - IMQ versions between 2.6.7 and 2.6.13 were
|
|
|
-+ * released with almost no problems. 2.6.14-x was released
|
|
|
-+ * with some important changes: nfcache was removed; After
|
|
|
-+ * some weeks of trouble we figured out that some IMQ fields
|
|
|
-+ * in skb were missing in skbuff.c - skb_clone and copy_skb_header.
|
|
|
-+ * These functions are correctly patched by this new patch version.
|
|
|
-+ *
|
|
|
-+ * Thanks for all who helped to figure out all the problems with
|
|
|
-+ * 2.6.14.x: Patrick McHardy, Rune Kock, VeNoMouS, Max CtRiX,
|
|
|
-+ * Kevin Shanahan, Richard Lucassen, Valery Dachev (hopefully
|
|
|
-+ * I didn't forget anybody). I apologize again for my lack of time.
|
|
|
-+ *
|
|
|
-+ *
|
|
|
-+ * 2008/06/17 - 2.6.25 - Changed imq.c to use qdisc_run() instead
|
|
|
-+ * of qdisc_restart() and moved qdisc_run() to tasklet to avoid
|
|
|
-+ * recursive locking. New initialization routines to fix 'rmmod' not
|
|
|
-+ * working anymore. Used code from ifb.c. (Jussi Kivilinna)
|
|
|
-+ *
|
|
|
-+ * 2008/08/06 - 2.6.26 - (JK)
|
|
|
-+ * - Replaced tasklet with 'netif_schedule()'.
|
|
|
-+ * - Cleaned up and added comments for imq_nf_queue().
|
|
|
-+ *
|
|
|
-+ * 2009/04/12
|
|
|
-+ * - Add skb_save_cb/skb_restore_cb helper functions for backuping
|
|
|
-+ * control buffer. This is needed because qdisc-layer on kernels
|
|
|
-+ * 2.6.27 and newer overwrite control buffer. (Jussi Kivilinna)
|
|
|
-+ * - Add better locking for IMQ device. Hopefully this will solve
|
|
|
-+ * SMP issues. (Jussi Kivilinna)
|
|
|
-+ * - Port to 2.6.27
|
|
|
-+ * - Port to 2.6.28
|
|
|
-+ * - Port to 2.6.29 + fix rmmod not working
|
|
|
-+ *
|
|
|
-+ * 2009/04/20 - (Jussi Kivilinna)
|
|
|
-+ * - Use netdevice feature flags to avoid extra packet handling
|
|
|
-+ * by core networking layer and possibly increase performance.
|
|
|
-+ *
|
|
|
-+ * 2009/09/26 - (Jussi Kivilinna)
|
|
|
-+ * - Add imq_nf_reinject_lockless to fix deadlock with
|
|
|
-+ * imq_nf_queue/imq_nf_reinject.
|
|
|
-+ *
|
|
|
-+ * 2009/12/08 - (Jussi Kivilinna)
|
|
|
-+ * - Port to 2.6.32
|
|
|
-+ * - Add check for skb->nf_queue_entry==NULL in imq_dev_xmit()
|
|
|
-+ * - Also add better error checking for skb->nf_queue_entry usage
|
|
|
-+ *
|
|
|
-+ * 2010/02/25 - (Jussi Kivilinna)
|
|
|
-+ * - Port to 2.6.33
|
|
|
-+ *
|
|
|
-+ * 2010/08/12 - (Jussi Kivilinna)
|
|
|
-+ * - Port to 2.6.35
|
|
|
-+ *
|
|
|
-+ * Also, many thanks to pablo Sebastian Greco for making the initial
|
|
|
-+ * patch and to those who helped the testing.
|
|
|
-+ *
|
|
|
-+ * More info at: http://www.linuximq.net/ (Andre Correa)
|
|
|
-+ */
|
|
|
-+
|
|
|
-+#include <linux/module.h>
|
|
|
-+#include <linux/kernel.h>
|
|
|
-+#include <linux/moduleparam.h>
|
|
|
-+#include <linux/list.h>
|
|
|
-+#include <linux/skbuff.h>
|
|
|
-+#include <linux/netdevice.h>
|
|
|
-+#include <linux/etherdevice.h>
|
|
|
-+#include <linux/rtnetlink.h>
|
|
|
-+#include <linux/if_arp.h>
|
|
|
-+#include <linux/netfilter.h>
|
|
|
-+#include <linux/netfilter_ipv4.h>
|
|
|
-+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
|
-+ #include <linux/netfilter_ipv6.h>
|
|
|
-+#endif
|
|
|
-+#include <linux/imq.h>
|
|
|
-+#include <net/pkt_sched.h>
|
|
|
-+#include <net/netfilter/nf_queue.h>
|
|
|
-+
|
|
|
-+static nf_hookfn imq_nf_hook;
|
|
|
-+
|
|
|
-+static struct nf_hook_ops imq_ingress_ipv4 = {
|
|
|
-+ .hook = imq_nf_hook,
|
|
|
-+ .owner = THIS_MODULE,
|
|
|
-+ .pf = PF_INET,
|
|
|
-+ .hooknum = NF_INET_PRE_ROUTING,
|
|
|
-+#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
|
|
|
-+ .priority = NF_IP_PRI_MANGLE + 1
|
|
|
-+#else
|
|
|
-+ .priority = NF_IP_PRI_NAT_DST + 1
|
|
|
-+#endif
|
|
|
-+};
|
|
|
-+
|
|
|
-+static struct nf_hook_ops imq_egress_ipv4 = {
|
|
|
-+ .hook = imq_nf_hook,
|
|
|
-+ .owner = THIS_MODULE,
|
|
|
-+ .pf = PF_INET,
|
|
|
-+ .hooknum = NF_INET_POST_ROUTING,
|
|
|
-+#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
|
|
|
-+ .priority = NF_IP_PRI_LAST
|
|
|
-+#else
|
|
|
-+ .priority = NF_IP_PRI_NAT_SRC - 1
|
|
|
-+#endif
|
|
|
-+};
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
|
-+static struct nf_hook_ops imq_ingress_ipv6 = {
|
|
|
-+ .hook = imq_nf_hook,
|
|
|
-+ .owner = THIS_MODULE,
|
|
|
-+ .pf = PF_INET6,
|
|
|
-+ .hooknum = NF_INET_PRE_ROUTING,
|
|
|
-+#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
|
|
|
-+ .priority = NF_IP6_PRI_MANGLE + 1
|
|
|
-+#else
|
|
|
-+ .priority = NF_IP6_PRI_NAT_DST + 1
|
|
|
-+#endif
|
|
|
-+};
|
|
|
-+
|
|
|
-+static struct nf_hook_ops imq_egress_ipv6 = {
|
|
|
-+ .hook = imq_nf_hook,
|
|
|
-+ .owner = THIS_MODULE,
|
|
|
-+ .pf = PF_INET6,
|
|
|
-+ .hooknum = NF_INET_POST_ROUTING,
|
|
|
-+#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
|
|
|
-+ .priority = NF_IP6_PRI_LAST
|
|
|
-+#else
|
|
|
-+ .priority = NF_IP6_PRI_NAT_SRC - 1
|
|
|
-+#endif
|
|
|
-+};
|
|
|
-+#endif
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IMQ_NUM_DEVS)
|
|
|
-+static unsigned int numdevs = CONFIG_IMQ_NUM_DEVS;
|
|
|
-+#else
|
|
|
-+static unsigned int numdevs = IMQ_MAX_DEVS;
|
|
|
-+#endif
|
|
|
-+
|
|
|
-+static DEFINE_SPINLOCK(imq_nf_queue_lock);
|
|
|
-+
|
|
|
-+static struct net_device *imq_devs_cache[IMQ_MAX_DEVS];
|
|
|
-+
|
|
|
-+
|
|
|
-+static struct net_device_stats *imq_get_stats(struct net_device *dev)
|
|
|
-+{
|
|
|
-+ return &dev->stats;
|
|
|
-+}
|
|
|
-+
|
|
|
-+/* called for packets kfree'd in qdiscs at places other than enqueue */
|
|
|
-+static void imq_skb_destructor(struct sk_buff *skb)
|
|
|
-+{
|
|
|
-+ struct nf_queue_entry *entry = skb->nf_queue_entry;
|
|
|
-+
|
|
|
-+ skb->nf_queue_entry = NULL;
|
|
|
-+
|
|
|
-+ if (entry) {
|
|
|
-+ nf_queue_entry_release_refs(entry);
|
|
|
-+ kfree(entry);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ skb_restore_cb(skb); /* kfree backup */
|
|
|
-+}
|
|
|
-+
|
|
|
-+/* locking not needed when called from imq_nf_queue */
|
|
|
-+static void imq_nf_reinject_lockless(struct nf_queue_entry *entry,
|
|
|
-+ unsigned int verdict)
|
|
|
-+{
|
|
|
-+ int status;
|
|
|
-+
|
|
|
-+ if (!entry->next_outfn) {
|
|
|
-+ nf_reinject(entry, verdict);
|
|
|
-+ return;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ status = entry->next_outfn(entry, entry->next_queuenum);
|
|
|
-+ if (status < 0) {
|
|
|
-+ nf_queue_entry_release_refs(entry);
|
|
|
-+ kfree_skb(entry->skb);
|
|
|
-+ kfree(entry);
|
|
|
-+ }
|
|
|
-+}
|
|
|
-+
|
|
|
-+static void imq_nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
|
|
|
-+{
|
|
|
-+ int status;
|
|
|
-+
|
|
|
-+ if (!entry->next_outfn) {
|
|
|
-+ spin_lock_bh(&imq_nf_queue_lock);
|
|
|
-+ nf_reinject(entry, verdict);
|
|
|
-+ spin_unlock_bh(&imq_nf_queue_lock);
|
|
|
-+ return;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ rcu_read_lock();
|
|
|
-+ local_bh_disable();
|
|
|
-+ status = entry->next_outfn(entry, entry->next_queuenum);
|
|
|
-+ local_bh_enable();
|
|
|
-+ if (status < 0) {
|
|
|
-+ nf_queue_entry_release_refs(entry);
|
|
|
-+ kfree_skb(entry->skb);
|
|
|
-+ kfree(entry);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ rcu_read_unlock();
|
|
|
-+}
|
|
|
-+
|
|
|
-+static netdev_tx_t imq_dev_xmit(struct sk_buff *skb, struct net_device *dev)
|
|
|
-+{
|
|
|
-+ struct nf_queue_entry *entry = skb->nf_queue_entry;
|
|
|
-+
|
|
|
-+ skb->nf_queue_entry = NULL;
|
|
|
-+ dev->trans_start = jiffies;
|
|
|
-+
|
|
|
-+ dev->stats.tx_bytes += skb->len;
|
|
|
-+ dev->stats.tx_packets++;
|
|
|
-+
|
|
|
-+ if (entry == NULL) {
|
|
|
-+ /* We don't know what is going on here.. packet is queued for
|
|
|
-+ * imq device, but (probably) not by us.
|
|
|
-+ *
|
|
|
-+ * If this packet was not send here by imq_nf_queue(), then
|
|
|
-+ * skb_save_cb() was not used and skb_free() should not show:
|
|
|
-+ * WARNING: IMQ: kfree_skb: skb->cb_next:..
|
|
|
-+ * and/or
|
|
|
-+ * WARNING: IMQ: kfree_skb: skb->nf_queue_entry...
|
|
|
-+ *
|
|
|
-+ * However if this message is shown, then IMQ is somehow broken
|
|
|
-+ * and you should report this to linuximq.net.
|
|
|
-+ */
|
|
|
-+
|
|
|
-+ /* imq_dev_xmit is black hole that eats all packets, report that
|
|
|
-+ * we eat this packet happily and increase dropped counters.
|
|
|
-+ */
|
|
|
-+
|
|
|
-+ dev->stats.tx_dropped++;
|
|
|
-+ dev_kfree_skb(skb);
|
|
|
-+
|
|
|
-+ return NETDEV_TX_OK;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ skb_restore_cb(skb); /* restore skb->cb */
|
|
|
-+
|
|
|
-+ skb->imq_flags = 0;
|
|
|
-+ skb->destructor = NULL;
|
|
|
-+
|
|
|
-+ imq_nf_reinject(entry, NF_ACCEPT);
|
|
|
-+
|
|
|
-+ return NETDEV_TX_OK;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int imq_nf_queue(struct nf_queue_entry *entry, unsigned queue_num)
|
|
|
-+{
|
|
|
-+ struct net_device *dev;
|
|
|
-+ struct sk_buff *skb_orig, *skb, *skb_shared;
|
|
|
-+ struct Qdisc *q;
|
|
|
-+ struct netdev_queue *txq;
|
|
|
-+ int users, index;
|
|
|
-+ int retval = -EINVAL;
|
|
|
-+
|
|
|
-+ index = entry->skb->imq_flags & IMQ_F_IFMASK;
|
|
|
-+ if (unlikely(index > numdevs - 1)) {
|
|
|
-+ if (net_ratelimit())
|
|
|
-+ printk(KERN_WARNING
|
|
|
-+ "IMQ: invalid device specified, highest is %u\n",
|
|
|
-+ numdevs - 1);
|
|
|
-+ retval = -EINVAL;
|
|
|
-+ goto out;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /* check for imq device by index from cache */
|
|
|
-+ dev = imq_devs_cache[index];
|
|
|
-+ if (unlikely(!dev)) {
|
|
|
-+ char buf[8];
|
|
|
-+
|
|
|
-+ /* get device by name and cache result */
|
|
|
-+ snprintf(buf, sizeof(buf), "imq%d", index);
|
|
|
-+ dev = dev_get_by_name(&init_net, buf);
|
|
|
-+ if (!dev) {
|
|
|
-+ /* not found ?!*/
|
|
|
-+ BUG();
|
|
|
-+ retval = -ENODEV;
|
|
|
-+ goto out;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ imq_devs_cache[index] = dev;
|
|
|
-+ dev_put(dev);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ if (unlikely(!(dev->flags & IFF_UP))) {
|
|
|
-+ entry->skb->imq_flags = 0;
|
|
|
-+ imq_nf_reinject_lockless(entry, NF_ACCEPT);
|
|
|
-+ retval = 0;
|
|
|
-+ goto out;
|
|
|
-+ }
|
|
|
-+ dev->last_rx = jiffies;
|
|
|
-+
|
|
|
-+ skb = entry->skb;
|
|
|
-+ skb_orig = NULL;
|
|
|
-+
|
|
|
-+ /* skb has owner? => make clone */
|
|
|
-+ if (unlikely(skb->destructor)) {
|
|
|
-+ skb_orig = skb;
|
|
|
-+ skb = skb_clone(skb, GFP_ATOMIC);
|
|
|
-+ if (!skb) {
|
|
|
-+ retval = -ENOMEM;
|
|
|
-+ goto out;
|
|
|
-+ }
|
|
|
-+ entry->skb = skb;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ skb->nf_queue_entry = entry;
|
|
|
-+
|
|
|
-+ dev->stats.rx_bytes += skb->len;
|
|
|
-+ dev->stats.rx_packets++;
|
|
|
-+
|
|
|
-+ txq = dev_pick_tx(dev, skb);
|
|
|
-+
|
|
|
-+ q = rcu_dereference(txq->qdisc);
|
|
|
-+ if (unlikely(!q->enqueue))
|
|
|
-+ goto packet_not_eaten_by_imq_dev;
|
|
|
-+
|
|
|
-+ spin_lock_bh(qdisc_lock(q));
|
|
|
-+
|
|
|
-+ users = atomic_read(&skb->users);
|
|
|
-+
|
|
|
-+ skb_shared = skb_get(skb); /* increase reference count by one */
|
|
|
-+ skb_save_cb(skb_shared); /* backup skb->cb, as qdisc layer will
|
|
|
-+ overwrite it */
|
|
|
-+ qdisc_enqueue_root(skb_shared, q); /* might kfree_skb */
|
|
|
-+
|
|
|
-+ if (likely(atomic_read(&skb_shared->users) == users + 1)) {
|
|
|
-+ kfree_skb(skb_shared); /* decrease reference count by one */
|
|
|
-+
|
|
|
-+ skb->destructor = &imq_skb_destructor;
|
|
|
-+
|
|
|
-+ /* cloned? */
|
|
|
-+ if (skb_orig)
|
|
|
-+ kfree_skb(skb_orig); /* free original */
|
|
|
-+
|
|
|
-+ spin_unlock_bh(qdisc_lock(q));
|
|
|
-+
|
|
|
-+ /* schedule qdisc dequeue */
|
|
|
-+ __netif_schedule(q);
|
|
|
-+
|
|
|
-+ retval = 0;
|
|
|
-+ goto out;
|
|
|
-+ } else {
|
|
|
-+ skb_restore_cb(skb_shared); /* restore skb->cb */
|
|
|
-+ skb->nf_queue_entry = NULL;
|
|
|
-+ /* qdisc dropped packet and decreased skb reference count of
|
|
|
-+ * skb, so we don't really want to and try refree as that would
|
|
|
-+ * actually destroy the skb. */
|
|
|
-+ spin_unlock_bh(qdisc_lock(q));
|
|
|
-+ goto packet_not_eaten_by_imq_dev;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+packet_not_eaten_by_imq_dev:
|
|
|
-+ /* cloned? restore original */
|
|
|
-+ if (skb_orig) {
|
|
|
-+ kfree_skb(skb);
|
|
|
-+ entry->skb = skb_orig;
|
|
|
-+ }
|
|
|
-+ retval = -1;
|
|
|
-+out:
|
|
|
-+ return retval;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static struct nf_queue_handler nfqh = {
|
|
|
-+ .name = "imq",
|
|
|
-+ .outfn = imq_nf_queue,
|
|
|
-+};
|
|
|
-+
|
|
|
-+static unsigned int imq_nf_hook(unsigned int hook, struct sk_buff *pskb,
|
|
|
-+ const struct net_device *indev,
|
|
|
-+ const struct net_device *outdev,
|
|
|
-+ int (*okfn)(struct sk_buff *))
|
|
|
-+{
|
|
|
-+ if (pskb->imq_flags & IMQ_F_ENQUEUE)
|
|
|
-+ return NF_QUEUE;
|
|
|
-+
|
|
|
-+ return NF_ACCEPT;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int imq_close(struct net_device *dev)
|
|
|
-+{
|
|
|
-+ netif_stop_queue(dev);
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int imq_open(struct net_device *dev)
|
|
|
-+{
|
|
|
-+ netif_start_queue(dev);
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static const struct net_device_ops imq_netdev_ops = {
|
|
|
-+ .ndo_open = imq_open,
|
|
|
-+ .ndo_stop = imq_close,
|
|
|
-+ .ndo_start_xmit = imq_dev_xmit,
|
|
|
-+ .ndo_get_stats = imq_get_stats,
|
|
|
-+};
|
|
|
-+
|
|
|
-+static void imq_setup(struct net_device *dev)
|
|
|
-+{
|
|
|
-+ dev->netdev_ops = &imq_netdev_ops;
|
|
|
-+ dev->type = ARPHRD_VOID;
|
|
|
-+ dev->mtu = 16000;
|
|
|
-+ dev->tx_queue_len = 11000;
|
|
|
-+ dev->flags = IFF_NOARP;
|
|
|
-+ dev->features = NETIF_F_SG | NETIF_F_FRAGLIST |
|
|
|
-+ NETIF_F_GSO | NETIF_F_HW_CSUM |
|
|
|
-+ NETIF_F_HIGHDMA;
|
|
|
-+ dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int imq_validate(struct nlattr *tb[], struct nlattr *data[])
|
|
|
-+{
|
|
|
-+ int ret = 0;
|
|
|
-+
|
|
|
-+ if (tb[IFLA_ADDRESS]) {
|
|
|
-+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
|
|
|
-+ ret = -EINVAL;
|
|
|
-+ goto end;
|
|
|
-+ }
|
|
|
-+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
|
|
|
-+ ret = -EADDRNOTAVAIL;
|
|
|
-+ goto end;
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+ return 0;
|
|
|
-+end:
|
|
|
-+ printk(KERN_WARNING "IMQ: imq_validate failed (%d)\n", ret);
|
|
|
-+ return ret;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static struct rtnl_link_ops imq_link_ops __read_mostly = {
|
|
|
-+ .kind = "imq",
|
|
|
-+ .priv_size = 0,
|
|
|
-+ .setup = imq_setup,
|
|
|
-+ .validate = imq_validate,
|
|
|
-+};
|
|
|
-+
|
|
|
-+static int __init imq_init_hooks(void)
|
|
|
-+{
|
|
|
-+ int err;
|
|
|
-+
|
|
|
-+ nf_register_queue_imq_handler(&nfqh);
|
|
|
-+
|
|
|
-+ err = nf_register_hook(&imq_ingress_ipv4);
|
|
|
-+ if (err)
|
|
|
-+ goto err1;
|
|
|
-+
|
|
|
-+ err = nf_register_hook(&imq_egress_ipv4);
|
|
|
-+ if (err)
|
|
|
-+ goto err2;
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
|
-+ err = nf_register_hook(&imq_ingress_ipv6);
|
|
|
-+ if (err)
|
|
|
-+ goto err3;
|
|
|
-+
|
|
|
-+ err = nf_register_hook(&imq_egress_ipv6);
|
|
|
-+ if (err)
|
|
|
-+ goto err4;
|
|
|
-+#endif
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
|
-+err4:
|
|
|
-+ nf_unregister_hook(&imq_ingress_ipv6);
|
|
|
-+err3:
|
|
|
-+ nf_unregister_hook(&imq_egress_ipv4);
|
|
|
-+#endif
|
|
|
-+err2:
|
|
|
-+ nf_unregister_hook(&imq_ingress_ipv4);
|
|
|
-+err1:
|
|
|
-+ nf_unregister_queue_imq_handler();
|
|
|
-+ return err;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int __init imq_init_one(int index)
|
|
|
-+{
|
|
|
-+ struct net_device *dev;
|
|
|
-+ int ret;
|
|
|
-+
|
|
|
-+ dev = alloc_netdev(0, "imq%d", imq_setup);
|
|
|
-+ if (!dev)
|
|
|
-+ return -ENOMEM;
|
|
|
-+
|
|
|
-+ ret = dev_alloc_name(dev, dev->name);
|
|
|
-+ if (ret < 0)
|
|
|
-+ goto fail;
|
|
|
-+
|
|
|
-+ dev->rtnl_link_ops = &imq_link_ops;
|
|
|
-+ ret = register_netdevice(dev);
|
|
|
-+ if (ret < 0)
|
|
|
-+ goto fail;
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+fail:
|
|
|
-+ free_netdev(dev);
|
|
|
-+ return ret;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int __init imq_init_devs(void)
|
|
|
-+{
|
|
|
-+ int err, i;
|
|
|
-+
|
|
|
-+ if (numdevs < 1 || numdevs > IMQ_MAX_DEVS) {
|
|
|
-+ printk(KERN_ERR "IMQ: numdevs has to be betweed 1 and %u\n",
|
|
|
-+ IMQ_MAX_DEVS);
|
|
|
-+ return -EINVAL;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ rtnl_lock();
|
|
|
-+ err = __rtnl_link_register(&imq_link_ops);
|
|
|
-+
|
|
|
-+ for (i = 0; i < numdevs && !err; i++)
|
|
|
-+ err = imq_init_one(i);
|
|
|
-+
|
|
|
-+ if (err) {
|
|
|
-+ __rtnl_link_unregister(&imq_link_ops);
|
|
|
-+ memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
|
|
|
-+ }
|
|
|
-+ rtnl_unlock();
|
|
|
-+
|
|
|
-+ return err;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int __init imq_init_module(void)
|
|
|
-+{
|
|
|
-+ int err;
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IMQ_NUM_DEVS)
|
|
|
-+ BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS > 16);
|
|
|
-+ BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS < 2);
|
|
|
-+ BUILD_BUG_ON(CONFIG_IMQ_NUM_DEVS - 1 > IMQ_F_IFMASK);
|
|
|
-+#endif
|
|
|
-+
|
|
|
-+ err = imq_init_devs();
|
|
|
-+ if (err) {
|
|
|
-+ printk(KERN_ERR "IMQ: Error trying imq_init_devs(net)\n");
|
|
|
-+ return err;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ err = imq_init_hooks();
|
|
|
-+ if (err) {
|
|
|
-+ printk(KERN_ERR "IMQ: Error trying imq_init_hooks()\n");
|
|
|
-+ rtnl_link_unregister(&imq_link_ops);
|
|
|
-+ memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
|
|
|
-+ return err;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ printk(KERN_INFO "IMQ driver loaded successfully.\n");
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
|
|
|
-+ printk(KERN_INFO "\tHooking IMQ before NAT on PREROUTING.\n");
|
|
|
-+#else
|
|
|
-+ printk(KERN_INFO "\tHooking IMQ after NAT on PREROUTING.\n");
|
|
|
-+#endif
|
|
|
-+#if defined(CONFIG_IMQ_BEHAVIOR_AB) || defined(CONFIG_IMQ_BEHAVIOR_BB)
|
|
|
-+ printk(KERN_INFO "\tHooking IMQ before NAT on POSTROUTING.\n");
|
|
|
-+#else
|
|
|
-+ printk(KERN_INFO "\tHooking IMQ after NAT on POSTROUTING.\n");
|
|
|
-+#endif
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static void __exit imq_unhook(void)
|
|
|
-+{
|
|
|
-+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
|
-+ nf_unregister_hook(&imq_ingress_ipv6);
|
|
|
-+ nf_unregister_hook(&imq_egress_ipv6);
|
|
|
-+#endif
|
|
|
-+ nf_unregister_hook(&imq_ingress_ipv4);
|
|
|
-+ nf_unregister_hook(&imq_egress_ipv4);
|
|
|
-+
|
|
|
-+ nf_unregister_queue_imq_handler();
|
|
|
-+}
|
|
|
-+
|
|
|
-+static void __exit imq_cleanup_devs(void)
|
|
|
-+{
|
|
|
-+ rtnl_link_unregister(&imq_link_ops);
|
|
|
-+ memset(imq_devs_cache, 0, sizeof(imq_devs_cache));
|
|
|
-+}
|
|
|
-+
|
|
|
-+static void __exit imq_exit_module(void)
|
|
|
-+{
|
|
|
-+ imq_unhook();
|
|
|
-+ imq_cleanup_devs();
|
|
|
-+ printk(KERN_INFO "IMQ driver unloaded successfully.\n");
|
|
|
-+}
|
|
|
-+
|
|
|
-+module_init(imq_init_module);
|
|
|
-+module_exit(imq_exit_module);
|
|
|
-+
|
|
|
-+module_param(numdevs, int, 0);
|
|
|
-+MODULE_PARM_DESC(numdevs, "number of IMQ devices (how many imq* devices will "
|
|
|
-+ "be created)");
|
|
|
-+MODULE_AUTHOR("http://www.linuximq.net");
|
|
|
-+MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See "
|
|
|
-+ "http://www.linuximq.net/ for more information.");
|
|
|
-+MODULE_LICENSE("GPL");
|
|
|
-+MODULE_ALIAS_RTNL_LINK("imq");
|
|
|
-+
|
|
|
---- a/drivers/net/Kconfig
|
|
|
-+++ b/drivers/net/Kconfig
|
|
|
-@@ -121,6 +121,129 @@ config EQUALIZER
|
|
|
- To compile this driver as a module, choose M here: the module
|
|
|
- will be called eql. If unsure, say N.
|
|
|
-
|
|
|
-+config IMQ
|
|
|
-+ tristate "IMQ (intermediate queueing device) support"
|
|
|
-+ depends on NETDEVICES && NETFILTER
|
|
|
-+ ---help---
|
|
|
-+ The IMQ device(s) is used as placeholder for QoS queueing
|
|
|
-+ disciplines. Every packet entering/leaving the IP stack can be
|
|
|
-+ directed through the IMQ device where it's enqueued/dequeued to the
|
|
|
-+ attached qdisc. This allows you to treat network devices as classes
|
|
|
-+ and distribute bandwidth among them. Iptables is used to specify
|
|
|
-+ through which IMQ device, if any, packets travel.
|
|
|
-+
|
|
|
-+ More information at: http://www.linuximq.net/
|
|
|
-+
|
|
|
-+ To compile this driver as a module, choose M here: the module
|
|
|
-+ will be called imq. If unsure, say N.
|
|
|
-+
|
|
|
-+choice
|
|
|
-+ prompt "IMQ behavior (PRE/POSTROUTING)"
|
|
|
-+ depends on IMQ
|
|
|
-+ default IMQ_BEHAVIOR_AB
|
|
|
-+ help
|
|
|
-+
|
|
|
-+ This settings defines how IMQ behaves in respect to its
|
|
|
-+ hooking in PREROUTING and POSTROUTING.
|
|
|
-+
|
|
|
-+ IMQ can work in any of the following ways:
|
|
|
-+
|
|
|
-+ PREROUTING | POSTROUTING
|
|
|
-+ -----------------|-------------------
|
|
|
-+ #1 After NAT | After NAT
|
|
|
-+ #2 After NAT | Before NAT
|
|
|
-+ #3 Before NAT | After NAT
|
|
|
-+ #4 Before NAT | Before NAT
|
|
|
-+
|
|
|
-+ The default behavior is to hook before NAT on PREROUTING
|
|
|
-+ and after NAT on POSTROUTING (#3).
|
|
|
-+
|
|
|
-+ This settings are specially usefull when trying to use IMQ
|
|
|
-+ to shape NATed clients.
|
|
|
-+
|
|
|
-+ More information can be found at: www.linuximq.net
|
|
|
-+
|
|
|
-+ If not sure leave the default settings alone.
|
|
|
-+
|
|
|
-+config IMQ_BEHAVIOR_AA
|
|
|
-+ bool "IMQ AA"
|
|
|
-+ help
|
|
|
-+ This settings defines how IMQ behaves in respect to its
|
|
|
-+ hooking in PREROUTING and POSTROUTING.
|
|
|
-+
|
|
|
-+ Choosing this option will make IMQ hook like this:
|
|
|
-+
|
|
|
-+ PREROUTING: After NAT
|
|
|
-+ POSTROUTING: After NAT
|
|
|
-+
|
|
|
-+ More information can be found at: www.linuximq.net
|
|
|
-+
|
|
|
-+ If not sure leave the default settings alone.
|
|
|
-+
|
|
|
-+config IMQ_BEHAVIOR_AB
|
|
|
-+ bool "IMQ AB"
|
|
|
-+ help
|
|
|
-+ This settings defines how IMQ behaves in respect to its
|
|
|
-+ hooking in PREROUTING and POSTROUTING.
|
|
|
-+
|
|
|
-+ Choosing this option will make IMQ hook like this:
|
|
|
-+
|
|
|
-+ PREROUTING: After NAT
|
|
|
-+ POSTROUTING: Before NAT
|
|
|
-+
|
|
|
-+ More information can be found at: www.linuximq.net
|
|
|
-+
|
|
|
-+ If not sure leave the default settings alone.
|
|
|
-+
|
|
|
-+config IMQ_BEHAVIOR_BA
|
|
|
-+ bool "IMQ BA"
|
|
|
-+ help
|
|
|
-+ This settings defines how IMQ behaves in respect to its
|
|
|
-+ hooking in PREROUTING and POSTROUTING.
|
|
|
-+
|
|
|
-+ Choosing this option will make IMQ hook like this:
|
|
|
-+
|
|
|
-+ PREROUTING: Before NAT
|
|
|
-+ POSTROUTING: After NAT
|
|
|
-+
|
|
|
-+ More information can be found at: www.linuximq.net
|
|
|
-+
|
|
|
-+ If not sure leave the default settings alone.
|
|
|
-+
|
|
|
-+config IMQ_BEHAVIOR_BB
|
|
|
-+ bool "IMQ BB"
|
|
|
-+ help
|
|
|
-+ This settings defines how IMQ behaves in respect to its
|
|
|
-+ hooking in PREROUTING and POSTROUTING.
|
|
|
-+
|
|
|
-+ Choosing this option will make IMQ hook like this:
|
|
|
-+
|
|
|
-+ PREROUTING: Before NAT
|
|
|
-+ POSTROUTING: Before NAT
|
|
|
-+
|
|
|
-+ More information can be found at: www.linuximq.net
|
|
|
-+
|
|
|
-+ If not sure leave the default settings alone.
|
|
|
-+
|
|
|
-+endchoice
|
|
|
-+
|
|
|
-+config IMQ_NUM_DEVS
|
|
|
-+
|
|
|
-+ int "Number of IMQ devices"
|
|
|
-+ range 2 16
|
|
|
-+ depends on IMQ
|
|
|
-+ default "16"
|
|
|
-+ help
|
|
|
-+
|
|
|
-+ This settings defines how many IMQ devices will be
|
|
|
-+ created.
|
|
|
-+
|
|
|
-+ The default value is 16.
|
|
|
-+
|
|
|
-+ More information can be found at: www.linuximq.net
|
|
|
-+
|
|
|
-+ If not sure leave the default settings alone.
|
|
|
-+
|
|
|
- config TUN
|
|
|
- tristate "Universal TUN/TAP device driver support"
|
|
|
- select CRC32
|
|
|
---- a/drivers/net/Makefile
|
|
|
-+++ b/drivers/net/Makefile
|
|
|
-@@ -169,6 +169,7 @@ obj-$(CONFIG_SLHC) += slhc.o
|
|
|
- obj-$(CONFIG_XEN_NETDEV_FRONTEND) += xen-netfront.o
|
|
|
-
|
|
|
- obj-$(CONFIG_DUMMY) += dummy.o
|
|
|
-+obj-$(CONFIG_IMQ) += imq.o
|
|
|
- obj-$(CONFIG_IFB) += ifb.o
|
|
|
- obj-$(CONFIG_MACVLAN) += macvlan.o
|
|
|
- obj-$(CONFIG_MACVTAP) += macvtap.o
|
|
|
---- /dev/null
|
|
|
-+++ b/include/linux/imq.h
|
|
|
-@@ -0,0 +1,13 @@
|
|
|
-+#ifndef _IMQ_H
|
|
|
-+#define _IMQ_H
|
|
|
-+
|
|
|
-+/* IFMASK (16 device indexes, 0 to 15) and flag(s) fit in 5 bits */
|
|
|
-+#define IMQ_F_BITS 5
|
|
|
-+
|
|
|
-+#define IMQ_F_IFMASK 0x0f
|
|
|
-+#define IMQ_F_ENQUEUE 0x10
|
|
|
-+
|
|
|
-+#define IMQ_MAX_DEVS (IMQ_F_IFMASK + 1)
|
|
|
-+
|
|
|
-+#endif /* _IMQ_H */
|
|
|
-+
|
|
|
---- a/include/linux/netdevice.h
|
|
|
-+++ b/include/linux/netdevice.h
|
|
|
-@@ -1281,6 +1281,7 @@ extern int dev_alloc_name(struct net_de
|
|
|
- extern int dev_open(struct net_device *dev);
|
|
|
- extern int dev_close(struct net_device *dev);
|
|
|
- extern void dev_disable_lro(struct net_device *dev);
|
|
|
-+extern struct netdev_queue *dev_pick_tx(struct net_device *dev, struct sk_buff *skb);
|
|
|
- extern int dev_queue_xmit(struct sk_buff *skb);
|
|
|
- extern int register_netdevice(struct net_device *dev);
|
|
|
- extern void unregister_netdevice_queue(struct net_device *dev,
|
|
|
---- /dev/null
|
|
|
-+++ b/include/linux/netfilter/xt_IMQ.h
|
|
|
-@@ -0,0 +1,9 @@
|
|
|
-+#ifndef _XT_IMQ_H
|
|
|
-+#define _XT_IMQ_H
|
|
|
-+
|
|
|
-+struct xt_imq_info {
|
|
|
-+ unsigned int todev; /* target imq device */
|
|
|
-+};
|
|
|
-+
|
|
|
-+#endif /* _XT_IMQ_H */
|
|
|
-+
|
|
|
---- /dev/null
|
|
|
-+++ b/include/linux/netfilter_ipv4/ipt_IMQ.h
|
|
|
-@@ -0,0 +1,10 @@
|
|
|
-+#ifndef _IPT_IMQ_H
|
|
|
-+#define _IPT_IMQ_H
|
|
|
-+
|
|
|
-+/* Backwards compatibility for old userspace */
|
|
|
-+#include <linux/netfilter/xt_IMQ.h>
|
|
|
-+
|
|
|
-+#define ipt_imq_info xt_imq_info
|
|
|
-+
|
|
|
-+#endif /* _IPT_IMQ_H */
|
|
|
-+
|
|
|
---- /dev/null
|
|
|
-+++ b/include/linux/netfilter_ipv6/ip6t_IMQ.h
|
|
|
-@@ -0,0 +1,10 @@
|
|
|
-+#ifndef _IP6T_IMQ_H
|
|
|
-+#define _IP6T_IMQ_H
|
|
|
-+
|
|
|
-+/* Backwards compatibility for old userspace */
|
|
|
-+#include <linux/netfilter/xt_IMQ.h>
|
|
|
-+
|
|
|
-+#define ip6t_imq_info xt_imq_info
|
|
|
-+
|
|
|
-+#endif /* _IP6T_IMQ_H */
|
|
|
-+
|
|
|
---- a/include/linux/skbuff.h
|
|
|
-+++ b/include/linux/skbuff.h
|
|
|
-@@ -29,6 +29,9 @@
|
|
|
- #include <linux/rcupdate.h>
|
|
|
- #include <linux/dmaengine.h>
|
|
|
- #include <linux/hrtimer.h>
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+#include <linux/imq.h>
|
|
|
-+#endif
|
|
|
-
|
|
|
- /* Don't change this without changing skb_csum_unnecessary! */
|
|
|
- #define CHECKSUM_NONE 0
|
|
|
-@@ -329,6 +332,9 @@ struct sk_buff {
|
|
|
- * first. This is owned by whoever has the skb queued ATM.
|
|
|
- */
|
|
|
- char cb[48] __aligned(8);
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ void *cb_next;
|
|
|
-+#endif
|
|
|
-
|
|
|
- unsigned long _skb_refdst;
|
|
|
- #ifdef CONFIG_XFRM
|
|
|
-@@ -365,6 +371,9 @@ struct sk_buff {
|
|
|
- struct nf_conntrack *nfct;
|
|
|
- struct sk_buff *nfct_reasm;
|
|
|
- #endif
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ struct nf_queue_entry *nf_queue_entry;
|
|
|
-+#endif
|
|
|
- #ifdef CONFIG_BRIDGE_NETFILTER
|
|
|
- struct nf_bridge_info *nf_bridge;
|
|
|
- #endif
|
|
|
-@@ -391,6 +400,10 @@ struct sk_buff {
|
|
|
-
|
|
|
- /* 0/14 bit hole */
|
|
|
-
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ __u8 imq_flags:IMQ_F_BITS;
|
|
|
-+#endif
|
|
|
-+
|
|
|
- #ifdef CONFIG_NET_DMA
|
|
|
- dma_cookie_t dma_cookie;
|
|
|
- #endif
|
|
|
-@@ -489,6 +502,12 @@ static inline struct rtable *skb_rtable(
|
|
|
- return (struct rtable *)skb_dst(skb);
|
|
|
- }
|
|
|
-
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+extern int skb_save_cb(struct sk_buff *skb);
|
|
|
-+extern int skb_restore_cb(struct sk_buff *skb);
|
|
|
-+#endif
|
|
|
-+
|
|
|
- extern void kfree_skb(struct sk_buff *skb);
|
|
|
- extern void consume_skb(struct sk_buff *skb);
|
|
|
- extern void __kfree_skb(struct sk_buff *skb);
|
|
|
-@@ -2036,6 +2055,10 @@ static inline void __nf_copy(struct sk_b
|
|
|
- dst->nfct_reasm = src->nfct_reasm;
|
|
|
- nf_conntrack_get_reasm(src->nfct_reasm);
|
|
|
- #endif
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ dst->imq_flags = src->imq_flags;
|
|
|
-+ dst->nf_queue_entry = src->nf_queue_entry;
|
|
|
-+#endif
|
|
|
- #ifdef CONFIG_BRIDGE_NETFILTER
|
|
|
- dst->nf_bridge = src->nf_bridge;
|
|
|
- nf_bridge_get(src->nf_bridge);
|
|
|
---- a/include/net/netfilter/nf_queue.h
|
|
|
-+++ b/include/net/netfilter/nf_queue.h
|
|
|
-@@ -13,6 +13,12 @@ struct nf_queue_entry {
|
|
|
- struct net_device *indev;
|
|
|
- struct net_device *outdev;
|
|
|
- int (*okfn)(struct sk_buff *);
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ int (*next_outfn)(struct nf_queue_entry *entry,
|
|
|
-+ unsigned int queuenum);
|
|
|
-+ unsigned int next_queuenum;
|
|
|
-+#endif
|
|
|
- };
|
|
|
-
|
|
|
- #define nf_queue_entry_reroute(x) ((void *)x + sizeof(struct nf_queue_entry))
|
|
|
-@@ -30,5 +36,11 @@ extern int nf_unregister_queue_handler(u
|
|
|
- const struct nf_queue_handler *qh);
|
|
|
- extern void nf_unregister_queue_handlers(const struct nf_queue_handler *qh);
|
|
|
- extern void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict);
|
|
|
-+extern void nf_queue_entry_release_refs(struct nf_queue_entry *entry);
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+extern void nf_register_queue_imq_handler(const struct nf_queue_handler *qh);
|
|
|
-+extern void nf_unregister_queue_imq_handler(void);
|
|
|
-+#endif
|
|
|
-
|
|
|
- #endif /* _NF_QUEUE_H */
|
|
|
---- a/net/core/dev.c
|
|
|
-+++ b/net/core/dev.c
|
|
|
-@@ -98,6 +98,9 @@
|
|
|
- #include <net/net_namespace.h>
|
|
|
- #include <net/sock.h>
|
|
|
- #include <linux/rtnetlink.h>
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+#include <linux/imq.h>
|
|
|
-+#endif
|
|
|
- #include <linux/proc_fs.h>
|
|
|
- #include <linux/seq_file.h>
|
|
|
- #include <linux/stat.h>
|
|
|
-@@ -1931,7 +1934,11 @@ int dev_hard_start_xmit(struct sk_buff *
|
|
|
- int rc = NETDEV_TX_OK;
|
|
|
-
|
|
|
- if (likely(!skb->next)) {
|
|
|
-- if (!list_empty(&ptype_all))
|
|
|
-+ if (!list_empty(&ptype_all)
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ && !(skb->imq_flags & IMQ_F_ENQUEUE)
|
|
|
-+#endif
|
|
|
-+ )
|
|
|
- dev_queue_xmit_nit(skb, dev);
|
|
|
-
|
|
|
- /*
|
|
|
-@@ -2027,8 +2034,7 @@ static inline u16 dev_cap_txqueue(struct
|
|
|
- return queue_index;
|
|
|
- }
|
|
|
-
|
|
|
--static struct netdev_queue *dev_pick_tx(struct net_device *dev,
|
|
|
-- struct sk_buff *skb)
|
|
|
-+struct netdev_queue *dev_pick_tx(struct net_device *dev, struct sk_buff *skb)
|
|
|
- {
|
|
|
- int queue_index;
|
|
|
- struct sock *sk = skb->sk;
|
|
|
-@@ -2057,6 +2063,7 @@ static struct netdev_queue *dev_pick_tx(
|
|
|
- skb_set_queue_mapping(skb, queue_index);
|
|
|
- return netdev_get_tx_queue(dev, queue_index);
|
|
|
- }
|
|
|
-+EXPORT_SYMBOL(dev_pick_tx);
|
|
|
-
|
|
|
- static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
|
|
|
- struct net_device *dev,
|
|
|
---- a/net/core/skbuff.c
|
|
|
-+++ b/net/core/skbuff.c
|
|
|
-@@ -72,6 +72,9 @@
|
|
|
-
|
|
|
- static struct kmem_cache *skbuff_head_cache __read_mostly;
|
|
|
- static struct kmem_cache *skbuff_fclone_cache __read_mostly;
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+static struct kmem_cache *skbuff_cb_store_cache __read_mostly;
|
|
|
-+#endif
|
|
|
-
|
|
|
- static void sock_pipe_buf_release(struct pipe_inode_info *pipe,
|
|
|
- struct pipe_buffer *buf)
|
|
|
-@@ -91,6 +94,83 @@ static int sock_pipe_buf_steal(struct pi
|
|
|
- return 1;
|
|
|
- }
|
|
|
-
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+/* Control buffer save/restore for IMQ devices */
|
|
|
-+struct skb_cb_table {
|
|
|
-+ void *cb_next;
|
|
|
-+ atomic_t refcnt;
|
|
|
-+ char cb[48];
|
|
|
-+};
|
|
|
-+
|
|
|
-+static DEFINE_SPINLOCK(skb_cb_store_lock);
|
|
|
-+
|
|
|
-+int skb_save_cb(struct sk_buff *skb)
|
|
|
-+{
|
|
|
-+ struct skb_cb_table *next;
|
|
|
-+
|
|
|
-+ next = kmem_cache_alloc(skbuff_cb_store_cache, GFP_ATOMIC);
|
|
|
-+ if (!next)
|
|
|
-+ return -ENOMEM;
|
|
|
-+
|
|
|
-+ BUILD_BUG_ON(sizeof(skb->cb) != sizeof(next->cb));
|
|
|
-+
|
|
|
-+ memcpy(next->cb, skb->cb, sizeof(skb->cb));
|
|
|
-+ next->cb_next = skb->cb_next;
|
|
|
-+
|
|
|
-+ atomic_set(&next->refcnt, 1);
|
|
|
-+
|
|
|
-+ skb->cb_next = next;
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+EXPORT_SYMBOL(skb_save_cb);
|
|
|
-+
|
|
|
-+int skb_restore_cb(struct sk_buff *skb)
|
|
|
-+{
|
|
|
-+ struct skb_cb_table *next;
|
|
|
-+
|
|
|
-+ if (!skb->cb_next)
|
|
|
-+ return 0;
|
|
|
-+
|
|
|
-+ next = skb->cb_next;
|
|
|
-+
|
|
|
-+ BUILD_BUG_ON(sizeof(skb->cb) != sizeof(next->cb));
|
|
|
-+
|
|
|
-+ memcpy(skb->cb, next->cb, sizeof(skb->cb));
|
|
|
-+ skb->cb_next = next->cb_next;
|
|
|
-+
|
|
|
-+ spin_lock(&skb_cb_store_lock);
|
|
|
-+
|
|
|
-+ if (atomic_dec_and_test(&next->refcnt)) {
|
|
|
-+ kmem_cache_free(skbuff_cb_store_cache, next);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ spin_unlock(&skb_cb_store_lock);
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+EXPORT_SYMBOL(skb_restore_cb);
|
|
|
-+
|
|
|
-+static void skb_copy_stored_cb(struct sk_buff *new, const struct sk_buff *__old)
|
|
|
-+{
|
|
|
-+ struct skb_cb_table *next;
|
|
|
-+ struct sk_buff *old;
|
|
|
-+
|
|
|
-+ if (!__old->cb_next) {
|
|
|
-+ new->cb_next = NULL;
|
|
|
-+ return;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ spin_lock(&skb_cb_store_lock);
|
|
|
-+
|
|
|
-+ old = (struct sk_buff *)__old;
|
|
|
-+
|
|
|
-+ next = old->cb_next;
|
|
|
-+ atomic_inc(&next->refcnt);
|
|
|
-+ new->cb_next = next;
|
|
|
-+
|
|
|
-+ spin_unlock(&skb_cb_store_lock);
|
|
|
-+}
|
|
|
-+#endif
|
|
|
-
|
|
|
- /* Pipe buffer operations for a socket. */
|
|
|
- static const struct pipe_buf_operations sock_pipe_buf_ops = {
|
|
|
-@@ -391,6 +471,26 @@ static void skb_release_head_state(struc
|
|
|
- WARN_ON(in_irq());
|
|
|
- skb->destructor(skb);
|
|
|
- }
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ /* This should not happen. When it does, avoid memleak by restoring
|
|
|
-+ the chain of cb-backups. */
|
|
|
-+ while(skb->cb_next != NULL) {
|
|
|
-+ if (net_ratelimit())
|
|
|
-+ printk(KERN_WARNING "IMQ: kfree_skb: skb->cb_next: "
|
|
|
-+ "%08x\n", (unsigned int)skb->cb_next);
|
|
|
-+
|
|
|
-+ skb_restore_cb(skb);
|
|
|
-+ }
|
|
|
-+ /* This should not happen either, nf_queue_entry is nullified in
|
|
|
-+ * imq_dev_xmit(). If we have non-NULL nf_queue_entry then we are
|
|
|
-+ * leaking entry pointers, maybe memory. We don't know if this is
|
|
|
-+ * pointer to already freed memory, or should this be freed.
|
|
|
-+ * If this happens we need to add refcounting, etc for nf_queue_entry.
|
|
|
-+ */
|
|
|
-+ if (skb->nf_queue_entry && net_ratelimit())
|
|
|
-+ printk(KERN_WARNING
|
|
|
-+ "IMQ: kfree_skb: skb->nf_queue_entry != NULL");
|
|
|
-+#endif
|
|
|
- #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
|
|
|
- nf_conntrack_put(skb->nfct);
|
|
|
- nf_conntrack_put_reasm(skb->nfct_reasm);
|
|
|
-@@ -526,6 +626,9 @@ static void __copy_skb_header(struct sk_
|
|
|
- new->sp = secpath_get(old->sp);
|
|
|
- #endif
|
|
|
- memcpy(new->cb, old->cb, sizeof(old->cb));
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ skb_copy_stored_cb(new, old);
|
|
|
-+#endif
|
|
|
- new->csum = old->csum;
|
|
|
- new->local_df = old->local_df;
|
|
|
- new->pkt_type = old->pkt_type;
|
|
|
-@@ -2780,6 +2883,13 @@ void __init skb_init(void)
|
|
|
- 0,
|
|
|
- SLAB_HWCACHE_ALIGN|SLAB_PANIC,
|
|
|
- NULL);
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ skbuff_cb_store_cache = kmem_cache_create("skbuff_cb_store_cache",
|
|
|
-+ sizeof(struct skb_cb_table),
|
|
|
-+ 0,
|
|
|
-+ SLAB_HWCACHE_ALIGN|SLAB_PANIC,
|
|
|
-+ NULL);
|
|
|
-+#endif
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
---- a/net/netfilter/Kconfig
|
|
|
-+++ b/net/netfilter/Kconfig
|
|
|
-@@ -448,6 +448,18 @@ config NETFILTER_XT_TARGET_LED
|
|
|
- For more information on the LEDs available on your system, see
|
|
|
- Documentation/leds-class.txt
|
|
|
-
|
|
|
-+config NETFILTER_XT_TARGET_IMQ
|
|
|
-+ tristate '"IMQ" target support'
|
|
|
-+ depends on NETFILTER_XTABLES
|
|
|
-+ depends on IP_NF_MANGLE || IP6_NF_MANGLE
|
|
|
-+ select IMQ
|
|
|
-+ default m if NETFILTER_ADVANCED=n
|
|
|
-+ help
|
|
|
-+ This option adds a `IMQ' target which is used to specify if and
|
|
|
-+ to which imq device packets should get enqueued/dequeued.
|
|
|
-+
|
|
|
-+ To compile it as a module, choose M here. If unsure, say N.
|
|
|
-+
|
|
|
- config NETFILTER_XT_TARGET_MARK
|
|
|
- tristate '"MARK" target support'
|
|
|
- depends on NETFILTER_ADVANCED
|
|
|
---- a/net/netfilter/Makefile
|
|
|
-+++ b/net/netfilter/Makefile
|
|
|
-@@ -50,6 +50,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSEC
|
|
|
- obj-$(CONFIG_NETFILTER_XT_TARGET_CT) += xt_CT.o
|
|
|
- obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
|
|
|
- obj-$(CONFIG_NETFILTER_XT_TARGET_HL) += xt_HL.o
|
|
|
-+obj-$(CONFIG_NETFILTER_XT_TARGET_IMQ) += xt_IMQ.o
|
|
|
- obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
|
|
|
- obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
|
|
|
- obj-$(CONFIG_NETFILTER_XT_TARGET_NFQUEUE) += xt_NFQUEUE.o
|
|
|
---- a/net/netfilter/nf_queue.c
|
|
|
-+++ b/net/netfilter/nf_queue.c
|
|
|
-@@ -22,6 +22,26 @@ static const struct nf_queue_handler *qu
|
|
|
-
|
|
|
- static DEFINE_MUTEX(queue_handler_mutex);
|
|
|
-
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+static const struct nf_queue_handler *queue_imq_handler;
|
|
|
-+
|
|
|
-+void nf_register_queue_imq_handler(const struct nf_queue_handler *qh)
|
|
|
-+{
|
|
|
-+ mutex_lock(&queue_handler_mutex);
|
|
|
-+ rcu_assign_pointer(queue_imq_handler, qh);
|
|
|
-+ mutex_unlock(&queue_handler_mutex);
|
|
|
-+}
|
|
|
-+EXPORT_SYMBOL(nf_register_queue_imq_handler);
|
|
|
-+
|
|
|
-+void nf_unregister_queue_imq_handler(void)
|
|
|
-+{
|
|
|
-+ mutex_lock(&queue_handler_mutex);
|
|
|
-+ rcu_assign_pointer(queue_imq_handler, NULL);
|
|
|
-+ mutex_unlock(&queue_handler_mutex);
|
|
|
-+}
|
|
|
-+EXPORT_SYMBOL(nf_unregister_queue_imq_handler);
|
|
|
-+#endif
|
|
|
-+
|
|
|
- /* return EBUSY when somebody else is registered, return EEXIST if the
|
|
|
- * same handler is registered, return 0 in case of success. */
|
|
|
- int nf_register_queue_handler(u_int8_t pf, const struct nf_queue_handler *qh)
|
|
|
-@@ -82,7 +102,7 @@ void nf_unregister_queue_handlers(const
|
|
|
- }
|
|
|
- EXPORT_SYMBOL_GPL(nf_unregister_queue_handlers);
|
|
|
-
|
|
|
--static void nf_queue_entry_release_refs(struct nf_queue_entry *entry)
|
|
|
-+void nf_queue_entry_release_refs(struct nf_queue_entry *entry)
|
|
|
- {
|
|
|
- /* Release those devices we held, or Alexey will kill me. */
|
|
|
- if (entry->indev)
|
|
|
-@@ -102,6 +122,7 @@ static void nf_queue_entry_release_refs(
|
|
|
- /* Drop reference to owner of hook which queued us. */
|
|
|
- module_put(entry->elem->owner);
|
|
|
- }
|
|
|
-+EXPORT_SYMBOL_GPL(nf_queue_entry_release_refs);
|
|
|
-
|
|
|
- /*
|
|
|
- * Any packet that leaves via this function must come back
|
|
|
-@@ -123,12 +144,26 @@ static int __nf_queue(struct sk_buff *sk
|
|
|
- #endif
|
|
|
- const struct nf_afinfo *afinfo;
|
|
|
- const struct nf_queue_handler *qh;
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ const struct nf_queue_handler *qih = NULL;
|
|
|
-+#endif
|
|
|
-
|
|
|
- /* QUEUE == DROP if noone is waiting, to be safe. */
|
|
|
- rcu_read_lock();
|
|
|
-
|
|
|
- qh = rcu_dereference(queue_handler[pf]);
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
|
-+ if (pf == PF_INET || pf == PF_INET6)
|
|
|
-+#else
|
|
|
-+ if (pf == PF_INET)
|
|
|
-+#endif
|
|
|
-+ qih = rcu_dereference(queue_imq_handler);
|
|
|
-+
|
|
|
-+ if (!qh && !qih)
|
|
|
-+#else /* !IMQ */
|
|
|
- if (!qh)
|
|
|
-+#endif
|
|
|
- goto err_unlock;
|
|
|
-
|
|
|
- afinfo = nf_get_afinfo(pf);
|
|
|
-@@ -147,6 +182,10 @@ static int __nf_queue(struct sk_buff *sk
|
|
|
- .indev = indev,
|
|
|
- .outdev = outdev,
|
|
|
- .okfn = okfn,
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ .next_outfn = qh ? qh->outfn : NULL,
|
|
|
-+ .next_queuenum = queuenum,
|
|
|
-+#endif
|
|
|
- };
|
|
|
-
|
|
|
- /* If it's going away, ignore hook. */
|
|
|
-@@ -173,8 +212,19 @@ static int __nf_queue(struct sk_buff *sk
|
|
|
- #endif
|
|
|
- skb_dst_force(skb);
|
|
|
- afinfo->saveroute(skb, entry);
|
|
|
-+
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+ if (qih) {
|
|
|
-+ status = qih->outfn(entry, queuenum);
|
|
|
-+ goto imq_skip_queue;
|
|
|
-+ }
|
|
|
-+#endif
|
|
|
-+
|
|
|
- status = qh->outfn(entry, queuenum);
|
|
|
-
|
|
|
-+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
|
-+imq_skip_queue:
|
|
|
-+#endif
|
|
|
- rcu_read_unlock();
|
|
|
-
|
|
|
- if (status < 0) {
|
|
|
---- /dev/null
|
|
|
-+++ b/net/netfilter/xt_IMQ.c
|
|
|
-@@ -0,0 +1,73 @@
|
|
|
-+/*
|
|
|
-+ * This target marks packets to be enqueued to an imq device
|
|
|
-+ */
|
|
|
-+#include <linux/module.h>
|
|
|
-+#include <linux/skbuff.h>
|
|
|
-+#include <linux/netfilter/x_tables.h>
|
|
|
-+#include <linux/netfilter/xt_IMQ.h>
|
|
|
-+#include <linux/imq.h>
|
|
|
-+
|
|
|
-+static unsigned int imq_target(struct sk_buff *pskb,
|
|
|
-+ const struct xt_action_param *par)
|
|
|
-+{
|
|
|
-+ const struct xt_imq_info *mr = par->targinfo;
|
|
|
-+
|
|
|
-+ pskb->imq_flags = (mr->todev & IMQ_F_IFMASK) | IMQ_F_ENQUEUE;
|
|
|
-+
|
|
|
-+ return XT_CONTINUE;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static int imq_checkentry(const struct xt_tgchk_param *par)
|
|
|
-+{
|
|
|
-+ struct xt_imq_info *mr = par->targinfo;
|
|
|
-+
|
|
|
-+ if (mr->todev > IMQ_MAX_DEVS - 1) {
|
|
|
-+ printk(KERN_WARNING
|
|
|
-+ "IMQ: invalid device specified, highest is %u\n",
|
|
|
-+ IMQ_MAX_DEVS - 1);
|
|
|
-+ return -EINVAL;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ return 0;
|
|
|
-+}
|
|
|
-+
|
|
|
-+static struct xt_target xt_imq_reg[] __read_mostly = {
|
|
|
-+ {
|
|
|
-+ .name = "IMQ",
|
|
|
-+ .family = AF_INET,
|
|
|
-+ .checkentry = imq_checkentry,
|
|
|
-+ .target = imq_target,
|
|
|
-+ .targetsize = sizeof(struct xt_imq_info),
|
|
|
-+ .table = "mangle",
|
|
|
-+ .me = THIS_MODULE
|
|
|
-+ },
|
|
|
-+ {
|
|
|
-+ .name = "IMQ",
|
|
|
-+ .family = AF_INET6,
|
|
|
-+ .checkentry = imq_checkentry,
|
|
|
-+ .target = imq_target,
|
|
|
-+ .targetsize = sizeof(struct xt_imq_info),
|
|
|
-+ .table = "mangle",
|
|
|
-+ .me = THIS_MODULE
|
|
|
-+ },
|
|
|
-+};
|
|
|
-+
|
|
|
-+static int __init imq_init(void)
|
|
|
-+{
|
|
|
-+ return xt_register_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
|
|
|
-+}
|
|
|
-+
|
|
|
-+static void __exit imq_fini(void)
|
|
|
-+{
|
|
|
-+ xt_unregister_targets(xt_imq_reg, ARRAY_SIZE(xt_imq_reg));
|
|
|
-+}
|
|
|
-+
|
|
|
-+module_init(imq_init);
|
|
|
-+module_exit(imq_fini);
|
|
|
-+
|
|
|
-+MODULE_AUTHOR("http://www.linuximq.net");
|
|
|
-+MODULE_DESCRIPTION("Pseudo-driver for the intermediate queue device. See http://www.linuximq.net/ for more information.");
|
|
|
-+MODULE_LICENSE("GPL");
|
|
|
-+MODULE_ALIAS("ipt_IMQ");
|
|
|
-+MODULE_ALIAS("ip6t_IMQ");
|
|
|
-+
|