kernel: add patch to fix prefsrc lookups

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@47471 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/generic/patches-4.3/192-net-Fix-presrc-lookups.patch b/target/linux/generic/patches-4.3/192-net-Fix-presrc-lookups.patch
new file mode 100644 (file)
index 0000000..8a05083
--- /dev/null
+++ b/target/linux/generic/patches-4.3/192-net-Fix-presrc-lookups.patch
@@ -0,0 +1,60 @@
+From patchwork Tue Nov  3 23:59:28 2015
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: net: Fix prefsrc lookups
+From: David Ahern <dsa@cumulusnetworks.com>
+X-Patchwork-Id: 539645
+Message-Id: <1446595168-27323-1-git-send-email-dsa@cumulusnetworks.com>
+To: netdev@vger.kernel.org
+Cc: vladi@aresgate.net, David Ahern <dsa@cumulusnetworks.com>
+Date: Tue,  3 Nov 2015 15:59:28 -0800
+
+A bug report (https://bugzilla.kernel.org/show_bug.cgi?id=107071) noted
+that the follwoing ip command is failing with v4.3:
+
+    $ ip route add 10.248.5.0/24 dev bond0.250 table vlan_250 src 10.248.5.154
+    RTNETLINK answers: Invalid argument
+
+021dd3b8a142d changed the lookup of the given preferred source address to
+use the table id passed in, but this assumes the local entries are in the
+given table which is not necessarily true for non-VRF use cases. When
+validating the preferred source fallback to the local table on failure.
+
+Fixes: 021dd3b8a142d ("net: Add routes to the table associated with the device")
+Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
+---
+This is needed in v4.3.
+
+ net/ipv4/fib_semantics.c | 13 ++++++++++---
+ 1 file changed, 10 insertions(+), 3 deletions(-)
+
+diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c
+index 064bd3caaa4f..aac966f6162f 100644
+--- a/net/ipv4/fib_semantics.c
++++ b/net/ipv4/fib_semantics.c
+@@ -864,14 +864,21 @@ static bool fib_valid_prefsrc(struct fib_config *cfg, __be32 fib_prefsrc)
+       if (cfg->fc_type != RTN_LOCAL || !cfg->fc_dst ||
+           fib_prefsrc != cfg->fc_dst) {
+               u32 tb_id = cfg->fc_table;
++              int rc;
+ 
+               if (tb_id == RT_TABLE_MAIN)
+                       tb_id = RT_TABLE_LOCAL;
+ 
+-              if (inet_addr_type_table(cfg->fc_nlinfo.nl_net,
+-                                       fib_prefsrc, tb_id) != RTN_LOCAL) {
+-                      return false;
++              rc = inet_addr_type_table(cfg->fc_nlinfo.nl_net,
++                                        fib_prefsrc, tb_id);
++
++              if (rc != RTN_LOCAL && tb_id != RT_TABLE_LOCAL) {
++                      rc = inet_addr_type_table(cfg->fc_nlinfo.nl_net,
++                                                fib_prefsrc, RT_TABLE_LOCAL);
+               }
++
++              if (rc != RTN_LOCAL)
++                      return false;
+       }
+       return true;
+ }