linux.git/net/ipv6/ip6mr.c, branch v2.6.37

net: add a core netdev->rx_dropped counter

2010-10-05T21:47:55+00:00

In various situations, a device provides a packet to our stack and we
drop it before it enters protocol stack :
- softnet backlog full (accounted in /proc/net/softnet_stat)
- bad vlan tag (not accounted)
- unknown/unregistered protocol (not accounted)

We can handle a per-device counter of such dropped frames at core level,
and automatically adds it to the device provided stats (rx_dropped), so
that standard tools can be used (ifconfig, ip link, cat /proc/net/dev)

This is a generalization of commit 8990f468a (net: rx_dropped
accounting), thus reverting it.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

net: rx_dropped accounting

2010-09-20T17:08:58+00:00

Under load, netif_rx() can drop incoming packets but administrators dont
have a chance to spot which device needs some tuning (RPS activation for
example)

This patch adds rx_dropped accounting in vlans and tunnels.

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

ipmr: dont corrupt lists

2010-06-07T09:57:14+00:00

ipmr_rules_exit() and ip6mr_rules_exit() free a list of items, but
forget to properly remove these items from list. List head is not
changed and still points to freed memory.

This can trigger a fault later when icmpv6_sk_exit() is called.

Fix is to either reinit list, or use list_del() to properly remove items
from list before freeing them.

bugzilla report : https://bugzilla.kernel.org/show_bug.cgi?id=16120

Introduced by commit d1db275dd3f6e4 (ipv6: ip6mr: support multiple
tables) and commit f0ad0860d01e (ipv4: ipmr: support multiple tables)

Reported-by: Alex Zhavnerchik 
Signed-off-by: Eric Dumazet 
CC: Patrick McHardy 
Signed-off-by: David S. Miller

ip6mr: fix a typo in ip6mr_for_each_table()

2010-06-06T22:34:40+00:00

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

ipmr: off by one in __ipmr_fill_mroute()

2010-05-26T07:38:56+00:00

This fixes a smatch warning:
	net/ipv4/ipmr.c +1917 __ipmr_fill_mroute(12) error: buffer overflow
	'(mrt)->vif_table' 32 <= 32

The ipv6 version had the same issue.

Signed-off-by: Dan Carpenter 
Signed-off-by: David S. Miller

net: Introduce skb_tunnel_rx() helper

2010-05-18T05:36:55+00:00

skb rxhash should be cleared when a skb is handled by a tunnel before
being delivered again, so that correct packet steering can take place.

There are other cleanups and accounting that we can factorize in a new
helper, skb_tunnel_rx()

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

ipv6: ip6mr: add support for dumping routing tables over netlink

2010-05-11T12:40:56+00:00

The ip6mr /proc interface (ip6_mr_cache) can't be extended to dump routes
from any tables but the main table in a backwards compatible fashion since
the output format ends in a variable amount of output interfaces.

Introduce a new netlink interface to dump multicast routes from all tables,
similar to the netlink interface for regular routes.

Signed-off-by: Patrick McHardy

ipv6: ip6mr: support multiple tables

2010-05-11T12:40:55+00:00

This patch adds support for multiple independant multicast routing instances,
named "tables".

Userspace multicast routing daemons can bind to a specific table instance by
issuing a setsockopt call using a new option MRT6_TABLE. The table number is
stored in the raw socket data and affects all following ip6mr setsockopt(),
getsockopt() and ioctl() calls. By default, a single table (RT6_TABLE_DFLT)
is created with a default routing rule pointing to it. Newly created pim6reg
devices have the table number appended ("pim6regX"), with the exception of
devices created in the default table, which are named just "pim6reg" for
compatibility reasons.

Packets are directed to a specific table instance using routing rules,
similar to how regular routing rules work. Currently iif, oif and mark
are supported as keys, source and destination addresses could be supported
additionally.

Example usage:

- bind pimd/xorp/... to a specific table:

uint32_t table = 123;
setsockopt(fd, SOL_IPV6, MRT6_TABLE, &table, sizeof(table));

- create routing rules directing packets to the new table:

# ip -6 mrule add iif eth0 lookup 123
# ip -6 mrule add oif eth0 lookup 123

Signed-off-by: Patrick McHardy

ipv6: ip6mr: move mroute data into seperate structure

2010-05-11T12:40:53+00:00

Signed-off-by: Patrick McHardy

ipv6: ip6mr: convert struct mfc_cache to struct list_head

2010-05-11T12:40:51+00:00

Signed-off-by: Patrick McHardy