mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-09-12 14:15:51 +03:00
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17351 3c298f89-4303-0410-b956-a3cf2f4a3e73
1261 lines
34 KiB
Diff
1261 lines
34 KiB
Diff
--- /dev/null
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+++ b/drivers/net/imq.c
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@@ -0,0 +1,571 @@
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+/*
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+ * Pseudo-driver for the intermediate queue device.
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU General Public License
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+ * as published by the Free Software Foundation; either version
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+ * 2 of the License, or (at your option) any later version.
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+ *
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+ * Authors: Patrick McHardy, <kaber@trash.net>
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+ *
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+ * The first version was written by Martin Devera, <devik@cdi.cz>
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+ *
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+ * Credits: Jan Rafaj <imq2t@cedric.vabo.cz>
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+ * - Update patch to 2.4.21
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+ * Sebastian Strollo <sstrollo@nortelnetworks.com>
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+ * - Fix "Dead-loop on netdevice imq"-issue
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+ * Marcel Sebek <sebek64@post.cz>
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+ * - Update to 2.6.2-rc1
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+ *
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+ * After some time of inactivity there is a group taking care
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+ * of IMQ again: http://www.linuximq.net
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+ *
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+ *
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+ * 2004/06/30 - New version of IMQ patch to kernels <=2.6.7
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+ * including the following changes:
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+ *
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+ * - Correction of ipv6 support "+"s issue (Hasso Tepper)
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+ * - Correction of imq_init_devs() issue that resulted in
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+ * kernel OOPS unloading IMQ as module (Norbert Buchmuller)
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+ * - Addition of functionality to choose number of IMQ devices
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+ * during kernel config (Andre Correa)
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+ * - Addition of functionality to choose how IMQ hooks on
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+ * PRE and POSTROUTING (after or before NAT) (Andre Correa)
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+ * - Cosmetic corrections (Norbert Buchmuller) (Andre Correa)
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+ *
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+ *
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+ * 2005/12/16 - IMQ versions between 2.6.7 and 2.6.13 were
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+ * released with almost no problems. 2.6.14-x was released
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+ * with some important changes: nfcache was removed; After
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+ * some weeks of trouble we figured out that some IMQ fields
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+ * in skb were missing in skbuff.c - skb_clone and copy_skb_header.
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+ * These functions are correctly patched by this new patch version.
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+ *
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+ * Thanks for all who helped to figure out all the problems with
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+ * 2.6.14.x: Patrick McHardy, Rune Kock, VeNoMouS, Max CtRiX,
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+ * Kevin Shanahan, Richard Lucassen, Valery Dachev (hopefully
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+ * I didn't forget anybody). I apologize again for my lack of time.
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+ *
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+ *
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+ * 2008/06/17 - 2.6.25 - Changed imq.c to use qdisc_run() instead
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+ * of qdisc_restart() and moved qdisc_run() to tasklet to avoid
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+ * recursive locking. New initialization routines to fix 'rmmod' not
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+ * working anymore. Used code from ifb.c. (Jussi Kivilinna)
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+ *
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+ * 2008/08/06 - 2.6.26 - (JK)
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+ * - Replaced tasklet with 'netif_schedule()'.
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+ * - Cleaned up and added comments for imq_nf_queue().
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+ *
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+ * 2009/04/12
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+ * - Add skb_save_cb/skb_restore_cb helper functions for backuping
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+ * control buffer. This is needed because qdisc-layer on kernels
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+ * 2.6.27 and newer overwrite control buffer. (Jussi Kivilinna)
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+ * - Add better locking for IMQ device. Hopefully this will solve
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+ * SMP issues. (Jussi Kivilinna)
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+ * - Port to 2.6.27
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+ * - Port to 2.6.28
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+ * - Port to 2.6.29 + fix rmmod not working
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+ *
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+ * 2009/04/20 - (Jussi Kivilinna)
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+ * - Use netdevice feature flags to avoid extra packet handling
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+ * by core networking layer and possibly increase performance.
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+ *
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+ * Also, many thanks to pablo Sebastian Greco for making the initial
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+ * patch and to those who helped the testing.
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+ *
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+ * More info at: http://www.linuximq.net/ (Andre Correa)
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/kernel.h>
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+#include <linux/moduleparam.h>
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+#include <linux/list.h>
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+#include <linux/skbuff.h>
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+#include <linux/netdevice.h>
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+#include <linux/etherdevice.h>
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+#include <linux/rtnetlink.h>
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+#include <linux/if_arp.h>
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+#include <linux/netfilter.h>
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+#include <linux/netfilter_ipv4.h>
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+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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+ #include <linux/netfilter_ipv6.h>
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+#endif
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+#include <linux/imq.h>
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+#include <net/pkt_sched.h>
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+#include <net/netfilter/nf_queue.h>
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+
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+static nf_hookfn imq_nf_hook;
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+
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+static struct nf_hook_ops imq_ingress_ipv4 = {
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+ .hook = imq_nf_hook,
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+ .owner = THIS_MODULE,
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+ .pf = PF_INET,
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+ .hooknum = NF_INET_PRE_ROUTING,
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+#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
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+ .priority = NF_IP_PRI_MANGLE + 1
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+#else
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+ .priority = NF_IP_PRI_NAT_DST + 1
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+#endif
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+};
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+
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+static struct nf_hook_ops imq_egress_ipv4 = {
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+ .hook = imq_nf_hook,
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+ .owner = THIS_MODULE,
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+ .pf = PF_INET,
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+ .hooknum = NF_INET_POST_ROUTING,
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+#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
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+ .priority = NF_IP_PRI_LAST
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+#else
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+ .priority = NF_IP_PRI_NAT_SRC - 1
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+#endif
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+};
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+
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+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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+static struct nf_hook_ops imq_ingress_ipv6 = {
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+ .hook = imq_nf_hook,
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+ .owner = THIS_MODULE,
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+ .pf = PF_INET6,
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+ .hooknum = NF_INET_PRE_ROUTING,
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+#if defined(CONFIG_IMQ_BEHAVIOR_BA) || defined(CONFIG_IMQ_BEHAVIOR_BB)
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+ .priority = NF_IP6_PRI_MANGLE + 1
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+#else
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+ .priority = NF_IP6_PRI_NAT_DST + 1
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+#endif
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+};
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+
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+static struct nf_hook_ops imq_egress_ipv6 = {
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+ .hook = imq_nf_hook,
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+ .owner = THIS_MODULE,
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+ .pf = PF_INET6,
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+ .hooknum = NF_INET_POST_ROUTING,
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+#if defined(CONFIG_IMQ_BEHAVIOR_AA) || defined(CONFIG_IMQ_BEHAVIOR_BA)
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+ .priority = NF_IP6_PRI_LAST
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+#else
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+ .priority = NF_IP6_PRI_NAT_SRC - 1
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+#endif
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+};
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+#endif
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+
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+#if defined(CONFIG_IMQ_NUM_DEVS)
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+static unsigned int numdevs = CONFIG_IMQ_NUM_DEVS;
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+#else
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+static unsigned int numdevs = IMQ_MAX_DEVS;
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+#endif
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+
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+static DEFINE_SPINLOCK(imq_nf_queue_lock);
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+
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+static struct net_device *imq_devs_cache[IMQ_MAX_DEVS];
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+
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+
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+static struct net_device_stats *imq_get_stats(struct net_device *dev)
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+{
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+ return &dev->stats;
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+}
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+
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+/* called for packets kfree'd in qdiscs at places other than enqueue */
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+static void imq_skb_destructor(struct sk_buff *skb)
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+{
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+ struct nf_queue_entry *entry = skb->nf_queue_entry;
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+
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+ if (entry) {
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+ nf_queue_entry_release_refs(entry);
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+ kfree(entry);
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+ }
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+
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+ skb_restore_cb(skb); /* kfree backup */
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+}
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+
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+static void imq_nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
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+{
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+ int status;
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+
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+ if (!entry->next_outfn) {
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+ spin_lock_bh(&imq_nf_queue_lock);
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+ nf_reinject(entry, verdict);
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+ spin_unlock_bh(&imq_nf_queue_lock);
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+ return;
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+ }
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+
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+ rcu_read_lock();
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+ local_bh_disable();
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+ status = entry->next_outfn(entry, entry->next_queuenum);
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+ local_bh_enable();
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+ if (status < 0) {
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+ nf_queue_entry_release_refs(entry);
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+ kfree_skb(entry->skb);
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+ kfree(entry);
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+ }
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+
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+ rcu_read_unlock();
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+}
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+
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+static int imq_dev_xmit(struct sk_buff *skb, struct net_device *dev)
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+{
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+ dev->stats.tx_bytes += skb->len;
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+ dev->stats.tx_packets++;
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+
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+ skb->imq_flags = 0;
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+ skb->destructor = NULL;
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+
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+ skb_restore_cb(skb); /* restore skb->cb */
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+
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+ dev->trans_start = jiffies;
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+ imq_nf_reinject(skb->nf_queue_entry, NF_ACCEPT);
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+ return 0;
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+}
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+
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+static int imq_nf_queue(struct nf_queue_entry *entry, unsigned queue_num)
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+{
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+ struct net_device *dev;
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+ struct sk_buff *skb_orig, *skb, *skb_shared;
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+ struct Qdisc *q;
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+ struct netdev_queue *txq;
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+ int users, index;
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+ int retval = -EINVAL;
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+
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+ index = entry->skb->imq_flags & IMQ_F_IFMASK;
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+ if (unlikely(index > numdevs - 1)) {
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+ if (net_ratelimit())
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+ printk(KERN_WARNING
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+ "IMQ: invalid device specified, highest is %u\n",
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+ numdevs - 1);
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+ retval = -EINVAL;
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+ goto out;
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+ }
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+
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+ /* check for imq device by index from cache */
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+ dev = imq_devs_cache[index];
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+ if (unlikely(!dev)) {
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+ char buf[8];
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+
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+ /* get device by name and cache result */
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+ snprintf(buf, sizeof(buf), "imq%d", index);
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+ dev = dev_get_by_name(&init_net, buf);
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+ if (!dev) {
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+ /* not found ?!*/
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+ BUG();
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+ retval = -ENODEV;
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+ goto out;
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+ }
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+
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+ imq_devs_cache[index] = dev;
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+ dev_put(dev);
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+ }
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+
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+ if (unlikely(!(dev->flags & IFF_UP))) {
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+ entry->skb->imq_flags = 0;
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+ imq_nf_reinject(entry, NF_ACCEPT);
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+ retval = 0;
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+ goto out;
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+ }
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+ dev->last_rx = jiffies;
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+
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+ skb = entry->skb;
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+ skb_orig = NULL;
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+
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+ /* skb has owner? => make clone */
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+ if (unlikely(skb->destructor)) {
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+ skb_orig = skb;
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+ skb = skb_clone(skb, GFP_ATOMIC);
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+ if (!skb) {
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+ retval = -ENOMEM;
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+ goto out;
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+ }
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+ entry->skb = skb;
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+ }
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+
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+ skb->nf_queue_entry = entry;
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+
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+ dev->stats.rx_bytes += skb->len;
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+ dev->stats.rx_packets++;
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+
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+ txq = dev_pick_tx(dev, skb);
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+
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+ q = rcu_dereference(txq->qdisc);
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+ if (unlikely(!q->enqueue))
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+ goto packet_not_eaten_by_imq_dev;
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+
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+ spin_lock_bh(qdisc_lock(q));
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+
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+ users = atomic_read(&skb->users);
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+
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+ skb_shared = skb_get(skb); /* increase reference count by one */
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+ skb_save_cb(skb_shared); /* backup skb->cb, as qdisc layer will
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+ overwrite it */
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+ qdisc_enqueue_root(skb_shared, q); /* might kfree_skb */
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+
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+ if (likely(atomic_read(&skb_shared->users) == users + 1)) {
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+ kfree_skb(skb_shared); /* decrease reference count by one */
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+
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+ skb->destructor = &imq_skb_destructor;
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+
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+ /* cloned? */
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+ if (skb_orig)
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+ kfree_skb(skb_orig); /* free original */
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+
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+ spin_unlock_bh(qdisc_lock(q));
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+
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+ /* schedule qdisc dequeue */
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+ __netif_schedule(q);
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+
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+ retval = 0;
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+ goto out;
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+ } else {
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+ skb_restore_cb(skb_shared); /* restore skb->cb */
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+ /* qdisc dropped packet and decreased skb reference count of
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+ * skb, so we don't really want to and try refree as that would
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+ * actually destroy the skb. */
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+ spin_unlock_bh(qdisc_lock(q));
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+ goto packet_not_eaten_by_imq_dev;
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+ }
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+
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+packet_not_eaten_by_imq_dev:
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+ /* cloned? restore original */
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+ if (skb_orig) {
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+ kfree_skb(skb);
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+ entry->skb = skb_orig;
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+ }
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+ retval = -1;
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+out:
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+ return retval;
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+}
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+
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+static struct nf_queue_handler nfqh = {
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+ .name = "imq",
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+ .outfn = imq_nf_queue,
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+};
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+
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+static unsigned int imq_nf_hook(unsigned int hook, struct sk_buff *pskb,
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+ const struct net_device *indev,
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+ const struct net_device *outdev,
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+ int (*okfn)(struct sk_buff *))
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+{
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+ if (pskb->imq_flags & IMQ_F_ENQUEUE)
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+ return NF_QUEUE;
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+
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+ return NF_ACCEPT;
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+}
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+
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+static int imq_close(struct net_device *dev)
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+{
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+ netif_stop_queue(dev);
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+ return 0;
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+}
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+
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+static int imq_open(struct net_device *dev)
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+{
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+ netif_start_queue(dev);
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+ return 0;
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+}
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+
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+static const struct net_device_ops imq_netdev_ops = {
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+ .ndo_open = imq_open,
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+ .ndo_stop = imq_close,
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+ .ndo_start_xmit = imq_dev_xmit,
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+ .ndo_get_stats = imq_get_stats,
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+};
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+
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+static void imq_setup(struct net_device *dev)
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+{
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+ dev->netdev_ops = &imq_netdev_ops;
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+ dev->type = ARPHRD_VOID;
|
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+ dev->mtu = 16000;
|
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+ dev->tx_queue_len = 11000;
|
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+ dev->flags = IFF_NOARP;
|
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+ dev->features = NETIF_F_SG | NETIF_F_FRAGLIST |
|
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+ NETIF_F_GSO | NETIF_F_HW_CSUM |
|
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+ NETIF_F_HIGHDMA;
|
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+}
|
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+
|
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+static int imq_validate(struct nlattr *tb[], struct nlattr *data[])
|
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+{
|
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+ int ret = 0;
|
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+
|
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+ if (tb[IFLA_ADDRESS]) {
|
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+ if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) {
|
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+ ret = -EINVAL;
|
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+ goto end;
|
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+ }
|
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+ if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) {
|
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+ ret = -EADDRNOTAVAIL;
|
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+ goto end;
|
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+ }
|
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+ }
|
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+ return 0;
|
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+end:
|
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+ printk(KERN_WARNING "IMQ: imq_validate failed (%d)\n", ret);
|
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+ return ret;
|
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+}
|
|
+
|
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+static struct rtnl_link_ops imq_link_ops __read_mostly = {
|
|
+ .kind = "imq",
|
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+ .priv_size = 0,
|
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+ .setup = imq_setup,
|
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+ .validate = imq_validate,
|
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+};
|
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+
|
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+static int __init imq_init_hooks(void)
|
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+{
|
|
+ int err;
|
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+
|
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+ nf_register_queue_imq_handler(&nfqh);
|
|
+
|
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+ 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);
|
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+ if (err)
|
|
+ goto err4;
|
|
+#endif
|
|
+
|
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+ return 0;
|
|
+
|
|
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
+err4:
|
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+ nf_unregister_hook(&imq_ingress_ipv6);
|
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+err3:
|
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+ nf_unregister_hook(&imq_egress_ipv4);
|
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+#endif
|
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+err2:
|
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+ nf_unregister_hook(&imq_ingress_ipv4);
|
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+err1:
|
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+ 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
|
|
@@ -109,6 +109,129 @@ 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
|
|
@@ -160,6 +160,7 @@ 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_DE600) += de600.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 */
|
|
+
|
|
--- /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
|
|
@@ -331,6 +334,9 @@ struct sk_buff {
|
|
* first. This is owned by whoever has the skb queued ATM.
|
|
*/
|
|
char cb[48];
|
|
+#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE)
|
|
+ void *cb_next;
|
|
+#endif
|
|
|
|
unsigned int len,
|
|
data_len;
|
|
@@ -363,6 +369,9 @@ 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
|
|
@@ -386,6 +395,9 @@ struct sk_buff {
|
|
kmemcheck_bitfield_end(flags2);
|
|
|
|
/* 0/13/14 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;
|
|
@@ -441,6 +453,12 @@ 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);
|
|
@@ -1974,6 +1992,10 @@ 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/net/core/dev.c
|
|
+++ b/net/core/dev.c
|
|
@@ -96,6 +96,9 @@
|
|
#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>
|
|
@@ -1686,7 +1689,11 @@ int dev_hard_start_xmit(struct sk_buff *
|
|
int rc;
|
|
|
|
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);
|
|
|
|
if (netif_needs_gso(dev, skb)) {
|
|
@@ -1771,8 +1778,7 @@ u16 skb_tx_hash(const struct net_device
|
|
}
|
|
EXPORT_SYMBOL(skb_tx_hash);
|
|
|
|
-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)
|
|
{
|
|
const struct net_device_ops *ops = dev->netdev_ops;
|
|
u16 queue_index = 0;
|
|
@@ -1785,6 +1791,7 @@ 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);
|
|
|
|
/**
|
|
* dev_queue_xmit - transmit a buffer
|
|
--- a/include/linux/netdevice.h
|
|
+++ b/include/linux/netdevice.h
|
|
@@ -1102,6 +1102,7 @@ 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(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 */
|
|
+
|
|
--- 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/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 +94,80 @@ 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, struct sk_buff *old)
|
|
+{
|
|
+ struct skb_cb_table *next;
|
|
+
|
|
+ if (!old->cb_next) {
|
|
+ new->cb_next = 0;
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ spin_lock(&skb_cb_store_lock);
|
|
+
|
|
+ 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 struct pipe_buf_operations sock_pipe_buf_ops = {
|
|
@@ -398,6 +475,15 @@ 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) {
|
|
+ printk(KERN_WARNING "kfree_skb: skb->cb_next: %08x\n",
|
|
+ skb->cb_next);
|
|
+ skb_restore_cb(skb);
|
|
+ }
|
|
+#endif
|
|
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
|
|
nf_conntrack_put(skb->nfct);
|
|
nf_conntrack_put_reasm(skb->nfct_reasm);
|
|
@@ -535,6 +621,9 @@ 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;
|
|
@@ -2778,6 +2867,13 @@ 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
|
|
@@ -396,6 +396,18 @@ 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'
|
|
default m if NETFILTER_ADVANCED=n
|
|
--- a/net/netfilter/Makefile
|
|
+++ b/net/netfilter/Makefile
|
|
@@ -46,6 +46,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CONNMAR
|
|
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
|
|
obj-$(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_MARK) += xt_MARK.o
|
|
obj-$(CONFIG_NETFILTER_XT_TARGET_NFLOG) += xt_NFLOG.o
|
|
--- a/net/netfilter/nf_queue.c
|
|
+++ b/net/netfilter/nf_queue.c
|
|
@@ -20,6 +20,26 @@ 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)
|
|
@@ -80,7 +100,7 @@ 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)
|
|
@@ -100,6 +120,7 @@ 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
|
|
@@ -121,12 +142,26 @@ 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);
|
|
@@ -145,6 +180,10 @@ 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. */
|
|
@@ -170,8 +209,19 @@ static int __nf_queue(struct sk_buff *sk
|
|
}
|
|
#endif
|
|
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_target_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 bool 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 0;
|
|
+ }
|
|
+
|
|
+ return 1;
|
|
+}
|
|
+
|
|
+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");
|
|
+
|