diff options
Diffstat (limited to 'target/linux/generic/patches-2.6.31')
| -rw-r--r-- | target/linux/generic/patches-2.6.31/150-netfilter_imq.patch | 1260 |
1 files changed, 0 insertions, 1260 deletions
diff --git a/target/linux/generic/patches-2.6.31/150-netfilter_imq.patch b/target/linux/generic/patches-2.6.31/150-netfilter_imq.patch deleted file mode 100644 index ffe80b33b..000000000 --- a/target/linux/generic/patches-2.6.31/150-netfilter_imq.patch +++ /dev/null @@ -1,1260 +0,0 @@ ---- /dev/null -+++ b/drivers/net/imq.c -@@ -0,0 +1,571 @@ -+/* -+ * 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, <kaber@trash.net> -+ * -+ * The first version was written by Martin Devera, <devik@cdi.cz> -+ * -+ * Credits: Jan Rafaj <imq2t@cedric.vabo.cz> -+ * - Update patch to 2.4.21 -+ * Sebastian Strollo <sstrollo@nortelnetworks.com> -+ * - Fix "Dead-loop on netdevice imq"-issue -+ * Marcel Sebek <sebek64@post.cz> -+ * - 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. -+ * -+ * 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; -+ -+ if (entry) { -+ nf_queue_entry_release_refs(entry); -+ kfree(entry); -+ } -+ -+ skb_restore_cb(skb); /* kfree backup */ -+} -+ -+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 int imq_dev_xmit(struct sk_buff *skb, struct net_device *dev) -+{ -+ dev->stats.tx_bytes += skb->len; -+ dev->stats.tx_packets++; -+ -+ skb->imq_flags = 0; -+ skb->destructor = NULL; -+ -+ skb_restore_cb(skb); /* restore skb->cb */ -+ -+ dev->trans_start = jiffies; -+ imq_nf_reinject(skb->nf_queue_entry, NF_ACCEPT); -+ return 0; -+} -+ -+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(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 */ -+ /* 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; -+} -+ -+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 -@@ -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); -@@ -1976,6 +1994,10 @@ 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> -@@ -1687,7 +1690,11 @@ 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)) { -@@ -1772,8 +1779,7 @@ 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; -@@ -1786,6 +1792,7 @@ 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; -@@ -2779,6 +2868,13 @@ 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"); -+ |