generic-2.6: add 2.6.34 preliminary support (patches)

[openwrt/svn-archive/archive.git] / target / linux / generic-2.6 / patches-2.6.34 / 110-netfilter_match_speedup.patch

diff --git a/target/linux/generic-2.6/patches-2.6.34/110-netfilter_match_speedup.patch b/target/linux/generic-2.6/patches-2.6.34/110-netfilter_match_speedup.patch
new file mode 100644 (file)
index 0000000..69344a9
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.34/110-netfilter_match_speedup.patch
@@ -0,0 +1,121 @@
+--- a/include/linux/netfilter_ipv4/ip_tables.h
++++ b/include/linux/netfilter_ipv4/ip_tables.h
+@@ -62,6 +62,7 @@ struct ipt_ip {
+ #define IPT_F_FRAG            0x01    /* Set if rule is a fragment rule */
+ #define IPT_F_GOTO            0x02    /* Set if jump is a goto */
+ #define IPT_F_MASK            0x03    /* All possible flag bits mask. */
++#define IPT_F_NO_DEF_MATCH    0x80    /* Internal: no default match rules present */
+ 
+ /* Values for "inv" field in struct ipt_ip. */
+ #define IPT_INV_VIA_IN                0x01    /* Invert the sense of IN IFACE. */
+--- a/net/ipv4/netfilter/ip_tables.c
++++ b/net/ipv4/netfilter/ip_tables.c
+@@ -88,6 +88,9 @@ ip_packet_match(const struct iphdr *ip,
+ 
+ #define FWINV(bool, invflg) ((bool) ^ !!(ipinfo->invflags & (invflg)))
+ 
++      if (ipinfo->flags & IPT_F_NO_DEF_MATCH)
++              return true;
++
+       if (FWINV((ip->saddr&ipinfo->smsk.s_addr) != ipinfo->src.s_addr,
+                 IPT_INV_SRCIP) ||
+           FWINV((ip->daddr&ipinfo->dmsk.s_addr) != ipinfo->dst.s_addr,
+@@ -138,13 +141,35 @@ ip_packet_match(const struct iphdr *ip,
+               return false;
+       }
+ 
++#undef FWINV
+       return true;
+ }
+ 
+ static bool
+-ip_checkentry(const struct ipt_ip *ip)
++ip_checkentry(struct ipt_ip *ip)
+ {
+-      if (ip->flags & ~IPT_F_MASK) {
++#define FWINV(bool, invflg) ((bool) || (ip->invflags & (invflg)))
++
++      if (FWINV(ip->smsk.s_addr, IPT_INV_SRCIP) ||
++              FWINV(ip->dmsk.s_addr, IPT_INV_DSTIP))
++              goto has_match_rules;
++
++      if (FWINV(!!((const unsigned long *)ip->iniface_mask)[0],
++              IPT_INV_VIA_IN) ||
++          FWINV(!!((const unsigned long *)ip->outiface_mask)[0],
++              IPT_INV_VIA_OUT))
++              goto has_match_rules;
++
++      if (FWINV(ip->proto, IPT_INV_PROTO))
++              goto has_match_rules;
++
++      if (FWINV(ip->flags&IPT_F_FRAG, IPT_INV_FRAG))
++              goto has_match_rules;
++
++      ip->flags |= IPT_F_NO_DEF_MATCH;
++
++has_match_rules:
++      if (ip->flags & ~(IPT_F_MASK|IPT_F_NO_DEF_MATCH)) {
+               duprintf("Unknown flag bits set: %08X\n",
+                        ip->flags & ~IPT_F_MASK);
+               return false;
+@@ -154,6 +179,8 @@ ip_checkentry(const struct ipt_ip *ip)
+                        ip->invflags & ~IPT_INV_MASK);
+               return false;
+       }
++
++#undef FWINV
+       return true;
+ }
+ 
+@@ -196,7 +223,6 @@ static inline bool unconditional(const s
+       static const struct ipt_ip uncond;
+ 
+       return memcmp(ip, &uncond, sizeof(uncond)) == 0;
+-#undef FWINV
+ }
+ 
+ #if defined(CONFIG_NETFILTER_XT_TARGET_TRACE) || \
+@@ -321,8 +347,28 @@ ipt_do_table(struct sk_buff *skb,
+       struct xt_match_param mtpar;
+       struct xt_target_param tgpar;
+ 
+-      /* Initialization */
+       ip = ip_hdr(skb);
++
++      IP_NF_ASSERT(table->valid_hooks & (1 << hook));
++      xt_info_rdlock_bh();
++      private = table->private;
++      table_base = private->entries[smp_processor_id()];
++      e = get_entry(table_base, private->hook_entry[hook]);
++
++      if (e->target_offset <= sizeof(struct ipt_entry) &&
++              (e->ip.flags & IPT_F_NO_DEF_MATCH)) {
++                      struct ipt_entry_target *t = ipt_get_target(e);
++                      if (!t->u.kernel.target->target) {
++                              int v = ((struct ipt_standard_target *)t)->verdict;
++                              if ((v < 0) && (v != IPT_RETURN)) {
++                                      ADD_COUNTER(e->counters, ntohs(ip->tot_len), 1);
++                                      xt_info_rdunlock_bh();
++                                      return (unsigned)(-v) - 1;
++                              }
++                      }
++      }
++
++      /* Initialization */
+       indev = in ? in->name : nulldevname;
+       outdev = out ? out->name : nulldevname;
+       /* We handle fragments by dealing with the first fragment as
+@@ -339,13 +385,6 @@ ipt_do_table(struct sk_buff *skb,
+       mtpar.family  = tgpar.family = NFPROTO_IPV4;
+       mtpar.hooknum = tgpar.hooknum = hook;
+ 
+-      IP_NF_ASSERT(table->valid_hooks & (1 << hook));
+-      xt_info_rdlock_bh();
+-      private = table->private;
+-      table_base = private->entries[smp_processor_id()];
+-
+-      e = get_entry(table_base, private->hook_entry[hook]);
+-
+       /* For return from builtin chain */
+       back = get_entry(table_base, private->underflow[hook]);
+