diff options
Diffstat (limited to 'target/linux/generic-2.6/patches-2.6.32')
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.32/150-netfilter_imq.patch | 220 | ||||
| -rw-r--r-- | target/linux/generic-2.6/patches-2.6.32/205-skb_padding.patch | 8 |
2 files changed, 152 insertions, 76 deletions
diff --git a/target/linux/generic-2.6/patches-2.6.32/150-netfilter_imq.patch b/target/linux/generic-2.6/patches-2.6.32/150-netfilter_imq.patch index 23636699d..9540ce0dd 100644 --- a/target/linux/generic-2.6/patches-2.6.32/150-netfilter_imq.patch +++ b/target/linux/generic-2.6/patches-2.6.32/150-netfilter_imq.patch @@ -1,6 +1,6 @@ --- /dev/null +++ b/drivers/net/imq.c -@@ -0,0 +1,571 @@ +@@ -0,0 +1,632 @@ +/* + * Pseudo-driver for the intermediate queue device. + * @@ -50,7 +50,7 @@ + * 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 ++ * 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) @@ -73,6 +73,15 @@ + * - Use netdevice feature flags to avoid extra packet handling + * by core networking layer and possibly increase performance. + * ++ * 2009/09/26 - (Jussi Kivilinna) ++ * - Add imq_nf_reinject_lockless to fix deadlock with ++ * imq_nf_queue/imq_nf_reinject. ++ * ++ * 2009/12/08 - (Jussi Kivilinna) ++ * - Port to 2.6.32 ++ * - Add check for skb->nf_queue_entry==NULL in imq_dev_xmit() ++ * - Also add better error checking for skb->nf_queue_entry usage ++ * + * Also, many thanks to pablo Sebastian Greco for making the initial + * patch and to those who helped the testing. + * @@ -170,6 +179,8 @@ +{ + struct nf_queue_entry *entry = skb->nf_queue_entry; + ++ skb->nf_queue_entry = NULL; ++ + if (entry) { + nf_queue_entry_release_refs(entry); + kfree(entry); @@ -178,6 +189,25 @@ + skb_restore_cb(skb); /* kfree backup */ +} + ++/* locking not needed when called from imq_nf_queue */ ++static void imq_nf_reinject_lockless(struct nf_queue_entry *entry, ++ unsigned int verdict) ++{ ++ int status; ++ ++ if (!entry->next_outfn) { ++ nf_reinject(entry, verdict); ++ return; ++ } ++ ++ status = entry->next_outfn(entry, entry->next_queuenum); ++ if (status < 0) { ++ nf_queue_entry_release_refs(entry); ++ kfree_skb(entry->skb); ++ kfree(entry); ++ } ++} ++ +static void imq_nf_reinject(struct nf_queue_entry *entry, unsigned int verdict) +{ + int status; @@ -202,19 +232,48 @@ + rcu_read_unlock(); +} + -+static int imq_dev_xmit(struct sk_buff *skb, struct net_device *dev) ++static netdev_tx_t imq_dev_xmit(struct sk_buff *skb, struct net_device *dev) +{ ++ struct nf_queue_entry *entry = skb->nf_queue_entry; ++ ++ skb->nf_queue_entry = NULL; ++ dev->trans_start = jiffies; ++ + dev->stats.tx_bytes += skb->len; + dev->stats.tx_packets++; + ++ if (entry == NULL) { ++ /* We don't know what is going on here.. packet is queued for ++ * imq device, but (probably) not by us. ++ * ++ * If this packet was not send here by imq_nf_queue(), then ++ * skb_save_cb() was not used and skb_free() should not show: ++ * WARNING: IMQ: kfree_skb: skb->cb_next:.. ++ * and/or ++ * WARNING: IMQ: kfree_skb: skb->nf_queue_entry... ++ * ++ * However if this message is shown, then IMQ is somehow broken ++ * and you should report this to linuximq.net. ++ */ ++ ++ /* imq_dev_xmit is black hole that eats all packets, report that ++ * we eat this packet happily and increase dropped counters. ++ */ ++ ++ dev->stats.tx_dropped++; ++ dev_kfree_skb(skb); ++ ++ return NETDEV_TX_OK; ++ } ++ ++ skb_restore_cb(skb); /* restore skb->cb */ ++ + skb->imq_flags = 0; + skb->destructor = NULL; + -+ skb_restore_cb(skb); /* restore skb->cb */ ++ imq_nf_reinject(entry, NF_ACCEPT); + -+ dev->trans_start = jiffies; -+ imq_nf_reinject(skb->nf_queue_entry, NF_ACCEPT); -+ return 0; ++ return NETDEV_TX_OK; +} + +static int imq_nf_queue(struct nf_queue_entry *entry, unsigned queue_num) @@ -257,7 +316,7 @@ + + if (unlikely(!(dev->flags & IFF_UP))) { + entry->skb->imq_flags = 0; -+ imq_nf_reinject(entry, NF_ACCEPT); ++ imq_nf_reinject_lockless(entry, NF_ACCEPT); + retval = 0; + goto out; + } @@ -315,6 +374,7 @@ + goto out; + } else { + skb_restore_cb(skb_shared); /* restore skb->cb */ ++ skb->nf_queue_entry = NULL; + /* qdisc dropped packet and decreased skb reference count of + * skb, so we don't really want to and try refree as that would + * actually destroy the skb. */ @@ -378,6 +438,7 @@ + dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | + NETIF_F_GSO | NETIF_F_HW_CSUM | + NETIF_F_HIGHDMA; ++ dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; +} + +static int imq_validate(struct nlattr *tb[], struct nlattr *data[]) @@ -730,6 +791,28 @@ + +#endif /* _IMQ_H */ + +--- a/include/linux/netdevice.h ++++ b/include/linux/netdevice.h +@@ -1114,6 +1114,7 @@ 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 */ ++ --- /dev/null +++ b/include/linux/netfilter_ipv4/ipt_IMQ.h @@ -0,0 +1,10 @@ @@ -788,17 +871,18 @@ #ifdef CONFIG_BRIDGE_NETFILTER struct nf_bridge_info *nf_bridge; #endif -@@ -382,6 +391,9 @@ struct sk_buff { - kmemcheck_bitfield_end(flags2); +@@ -383,6 +392,10 @@ struct sk_buff { /* 0/14 bit hole */ + +#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) + __u8 imq_flags:IMQ_F_BITS; +#endif - ++ #ifdef CONFIG_NET_DMA dma_cookie_t dma_cookie; -@@ -437,6 +449,12 @@ static inline struct rtable *skb_rtable( + #endif +@@ -437,6 +450,12 @@ static inline struct rtable *skb_rtable( return (struct rtable *)skb_dst(skb); } @@ -811,7 +895,7 @@ extern void kfree_skb(struct sk_buff *skb); extern void consume_skb(struct sk_buff *skb); extern void __kfree_skb(struct sk_buff *skb); -@@ -1972,6 +1990,10 @@ static inline void __nf_copy(struct sk_b +@@ -1972,6 +1991,10 @@ static inline void __nf_copy(struct sk_b dst->nfct_reasm = src->nfct_reasm; nf_conntrack_get_reasm(src->nfct_reasm); #endif @@ -822,6 +906,33 @@ #ifdef CONFIG_BRIDGE_NETFILTER dst->nf_bridge = src->nf_bridge; nf_bridge_get(src->nf_bridge); +--- a/include/net/netfilter/nf_queue.h ++++ b/include/net/netfilter/nf_queue.h +@@ -13,6 +13,12 @@ struct nf_queue_entry { + struct net_device *indev; + struct net_device *outdev; + int (*okfn)(struct sk_buff *); ++ ++#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) ++ int (*next_outfn)(struct nf_queue_entry *entry, ++ unsigned int queuenum); ++ unsigned int next_queuenum; ++#endif + }; + + #define nf_queue_entry_reroute(x) ((void *)x + sizeof(struct nf_queue_entry)) +@@ -30,5 +36,11 @@ extern int nf_unregister_queue_handler(u + const struct nf_queue_handler *qh); + extern void nf_unregister_queue_handlers(const struct nf_queue_handler *qh); + extern void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict); ++extern void nf_queue_entry_release_refs(struct nf_queue_entry *entry); ++ ++#if defined(CONFIG_IMQ) || defined(CONFIG_IMQ_MODULE) ++extern void nf_register_queue_imq_handler(const struct nf_queue_handler *qh); ++extern void nf_unregister_queue_imq_handler(void); ++#endif + + #endif /* _NF_QUEUE_H */ --- a/net/core/dev.c +++ b/net/core/dev.c @@ -96,6 +96,9 @@ @@ -865,55 +976,6 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q, struct net_device *dev, ---- a/include/linux/netdevice.h -+++ b/include/linux/netdevice.h -@@ -1114,6 +1114,7 @@ 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 @@ @@ -926,7 +988,7 @@ 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 +@@ -91,6 +94,83 @@ static int sock_pipe_buf_steal(struct pi return 1; } @@ -986,17 +1048,20 @@ +} +EXPORT_SYMBOL(skb_restore_cb); + -+static void skb_copy_stored_cb(struct sk_buff *new, struct sk_buff *old) ++static void skb_copy_stored_cb(struct sk_buff *new, const struct sk_buff *__old) +{ + struct skb_cb_table *next; ++ struct sk_buff *old; + -+ if (!old->cb_next) { -+ new->cb_next = 0; ++ if (!__old->cb_next) { ++ new->cb_next = NULL; + return; + } + + spin_lock(&skb_cb_store_lock); + ++ old = (struct sk_buff *)__old; ++ + next = old->cb_next; + atomic_inc(&next->refcnt); + new->cb_next = next; @@ -1007,7 +1072,7 @@ /* 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 +@@ -398,6 +478,26 @@ static void skb_release_head_state(struc WARN_ON(in_irq()); skb->destructor(skb); } @@ -1015,25 +1080,36 @@ + /* 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); ++ if (net_ratelimit()) ++ printk(KERN_WARNING "IMQ: kfree_skb: skb->cb_next: " ++ "%08x\n", (unsigned int)skb->cb_next); ++ + skb_restore_cb(skb); + } ++ /* This should not happen either, nf_queue_entry is nullified in ++ * imq_dev_xmit(). If we have non-NULL nf_queue_entry then we are ++ * leaking entry pointers, maybe memory. We don't know if this is ++ * pointer to already freed memory, or should this be freed. ++ * If this happens we need to add refcounting, etc for nf_queue_entry. ++ */ ++ if (skb->nf_queue_entry && net_ratelimit()) ++ printk(KERN_WARNING ++ "IMQ: kfree_skb: skb->nf_queue_entry != NULL"); +#endif #if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE) nf_conntrack_put(skb->nfct); nf_conntrack_put_reasm(skb->nfct_reasm); -@@ -535,6 +621,9 @@ static void __copy_skb_header(struct sk_ +@@ -535,6 +635,9 @@ 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); ++ skb_copy_stored_cb(new, old); +#endif new->csum = old->csum; new->local_df = old->local_df; new->pkt_type = old->pkt_type; -@@ -2776,6 +2865,13 @@ void __init skb_init(void) +@@ -2776,6 +2879,13 @@ void __init skb_init(void) 0, SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL); diff --git a/target/linux/generic-2.6/patches-2.6.32/205-skb_padding.patch b/target/linux/generic-2.6/patches-2.6.32/205-skb_padding.patch index 948c0b2d4..face44c0a 100644 --- a/target/linux/generic-2.6/patches-2.6.32/205-skb_padding.patch +++ b/target/linux/generic-2.6/patches-2.6.32/205-skb_padding.patch @@ -1,6 +1,6 @@ --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h -@@ -1383,11 +1383,18 @@ static inline int skb_network_offset(con +@@ -1384,11 +1384,18 @@ static inline int skb_network_offset(con * * Various parts of the networking layer expect at least 32 bytes of * headroom, you should not reduce this. @@ -19,7 +19,7 @@ extern int ___pskb_trim(struct sk_buff *skb, unsigned int len); static inline void __skb_trim(struct sk_buff *skb, unsigned int len) -@@ -1477,9 +1484,9 @@ static inline void __skb_queue_purge(str +@@ -1478,9 +1485,9 @@ static inline void __skb_queue_purge(str static inline struct sk_buff *__dev_alloc_skb(unsigned int length, gfp_t gfp_mask) { @@ -31,7 +31,7 @@ return skb; } -@@ -1552,7 +1559,7 @@ static inline int __skb_cow(struct sk_bu +@@ -1553,7 +1560,7 @@ static inline int __skb_cow(struct sk_bu delta = headroom - skb_headroom(skb); if (delta || cloned) @@ -42,7 +42,7 @@ } --- a/net/core/skbuff.c +++ b/net/core/skbuff.c -@@ -336,9 +336,9 @@ struct sk_buff *__netdev_alloc_skb(struc +@@ -339,9 +339,9 @@ struct sk_buff *__netdev_alloc_skb(struc int node = dev->dev.parent ? dev_to_node(dev->dev.parent) : -1; struct sk_buff *skb; |