ipv6: avoid high order memory allocations for /proc/net/ipv6_route

Browse source

Dumping routes on a system with lots rt6_infos in the fibs causes up to
11-order allocations in seq_file (which fail). While we could switch
there to vmalloc we could just implement the streaming interface for
/proc/net/ipv6_route. This patch switches /proc/net/ipv6_route from
single_open_net to seq_open_net.

loff_t *pos tracks dst entries.

Also kill never used struct rt6_proc_arg and now unused function
fib6_clean_all_ro.

Cc: Ben Greear <greearb@candelatech.com>
Cc: Patrick McHardy <kaber@trash.net>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Hannes Frederic Sowa 2013-09-21 16:55:59 +02:00 • committed by David S. Miller

parent 6229ed1f22

commit 8d2ca1d7b5

3 changed files with 175 additions and 68 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

include/net/ip6_fib.h

View file

191

net/ipv6/ip6_fib.c

View file

46

net/ipv6/route.c

View file