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Julian Anastasov 636174219b ipv4: do not cache looped multicasts 
Starting from 3.6 we cache output routes for
multicasts only when using route to 224/4. For local receivers
we can set RTCF_LOCAL flag depending on the membership but
in such case we use maddr and saddr which are not caching
keys as before. Additionally, we can not use same place to
cache routes that differ in RTCF_LOCAL flag value.

	Fix it by caching only RTCF_MULTICAST entries
without RTCF_LOCAL (send-only, no loopback). As a side effect,
we avoid unneeded lookup for fnhe when not caching because
multicasts are not redirected and they do not learn PMTU.

	Thanks to Maxime Bizon for showing the caching
problems in __mkroute_output for 3.6 kernels: different
RTCF_LOCAL flag in cache can lead to wrong ip_mc_output or
ip_output call and the visible problem is that traffic can
not reach local receivers via loopback.

Reported-by: Maxime Bizon <mbizon@freebox.fr>
Tested-by: Maxime Bizon <mbizon@freebox.fr>
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-22 16:06:49 -05:00
..
9p The following changes since commit 4cbe5a555f: 2012-10-12 09:59:23 +09:00
802 tokenring: delete all remaining driver support 2012-05-15 20:23:16 -04:00
8021q vlan: allow to change type when no vlan device is hooked on netdev 2012-10-18 15:34:30 -04:00
appletalk userns: Print out socket uids in a user namespace aware fashion. 2012-08-14 21:48:06 -07:00
atm net🏧fix up ENOIOCTLCMD error handling 2012-08-31 16:14:33 -04:00
ax25 userns: Convert net/ax25 to use kuid_t where appropriate 2012-08-14 21:49:42 -07:00
batman-adv batman-adv: process broadcast packets in BLA earlier 2012-11-16 09:36:54 +01:00
bluetooth Bluetooth: Fix memory leak when removing a UUID 2012-11-09 16:45:37 +01:00
bridge bridge: Pull ip header into skb->data before looking into ip header. 2012-10-10 22:50:45 -04:00
caif caif: move the dereference below the NULL test 2012-09-10 16:13:31 -04:00
can sections: fix section conflicts in net/can 2012-10-06 03:04:45 +09:00
ceph Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2012-10-29 08:49:25 -07:00
core Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem 2012-11-21 11:48:31 -05:00
dcb netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
dccp dccp: fix info leak via getsockopt(DCCP_SOCKOPT_CCID_TX_INFO) 2012-08-15 21:36:31 -07:00
decnet sections: fix section conflicts in net 2012-10-06 03:04:45 +09:00
dns_resolver Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
dsa workqueue: deprecate flush[_delayed]_work_sync() 2012-08-20 14:51:24 -07:00
ethernet ipx: move peII functions 2012-07-19 10:48:00 -07:00
ieee802154 net/ieee802154/6lowpan.c: Remove unecessary semicolon 2012-09-18 16:08:19 -04:00
ipv4 ipv4: do not cache looped multicasts 2012-11-22 16:06:49 -05:00
ipv6 ipv6: fix inet6_csk_update_pmtu() return value 2012-11-20 15:16:15 -05:00
ipx userns: Print out socket uids in a user namespace aware fashion. 2012-08-14 21:48:06 -07:00
irda Merge 3.7-rc1 into tty-linus 2012-10-14 22:41:27 -07:00
iucv net: remove skb_orphan_try() 2012-06-15 15:30:15 -07:00
key net/key/af_key.c: add range checks on ->sadb_x_policy_len 2012-10-01 17:15:06 -04:00
l2tp l2tp: fix oops in l2tp_eth_create() error path 2012-11-02 21:56:35 -04:00
lapb lapb: Neaten debugging 2012-05-17 18:45:20 -04:00
llc Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2012-10-02 11:11:09 -07:00
mac80211 Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 2012-11-19 14:37:43 -05:00
mac802154 mac802154: sparse warnings: make symbols static 2012-07-12 07:54:45 -07:00
netfilter netfilter: cttimeout: fix buffer overflow 2012-11-21 23:50:14 +01:00
netlabel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
netlink netlink: use kfree_rcu() in netlink_release() 2012-10-18 15:34:30 -04:00
netrom net: change return values from -EACCES to -EPERM 2012-09-21 13:58:08 -04:00
nfc NFC: Fix nfc_llcp_local chained list insertion 2012-11-20 00:09:25 +01:00
openvswitch net/openvswitch/vport.c: Remove unecessary semicolon 2012-09-18 16:08:19 -04:00
packet Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2012-10-02 11:11:09 -07:00
phonet netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
rds RDS: fix rds-ping spinlock recursion 2012-10-09 13:57:23 -04:00
rfkill Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
rose
rxrpc Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux 2012-10-14 13:39:34 -07:00
sched pkt_sched: enable QFQ to support TSO/GSO 2012-11-07 15:37:04 -05:00
sctp sctp: fix /proc/net/sctp/ memory leak 2012-11-15 13:56:05 -05:00
sunrpc SUNRPC: return proper errno from backchannel_rqst 2012-11-01 11:50:53 -04:00
tipc tipc: do not use tasklet_disable before tasklet_kill 2012-11-03 15:10:14 -04:00
unix af_unix: old_cred is surplus 2012-09-17 13:00:13 -04:00
wanrouter wanmain: comparing array with NULL 2012-07-24 13:55:21 -07:00
wimax
wireless wireless: allow 40 MHz on world roaming channels 12/13 2012-11-12 16:26:06 +01:00
x25 net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
xfrm Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-10-02 13:38:27 -07:00
compat.c make get_file() return its argument 2012-09-26 21:10:25 -04:00
Kconfig net: Add INET dependency on aes crypto for the sake of TCP fastopen. 2012-09-04 14:20:14 -04:00
Makefile econet: remove ancient bug ridden protocol 2012-05-18 01:35:08 -04:00
nonet.c
socket.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2012-10-02 20:25:04 -07:00
sysctl_net.c net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00