xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

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
Download Patch File Download Diff File Expand all files Collapse all files

6
include/net/ip6_fib.h
View File

@@ -280,10 +280,6 @@ struct fib6_node *fib6_locate(struct fib6_node *root,
const struct in6_addr *daddr, int dst_len,
const struct in6_addr *saddr, int src_len);
void fib6_clean_all_ro(struct net *net,
int (*func)(struct rt6_info *, void *arg),
int prune, void *arg);
void fib6_clean_all(struct net *net, int (*func)(struct rt6_info *, void *arg),
int prune, void *arg);
@@ -299,6 +295,8 @@ void fib6_gc_cleanup(void);
int fib6_init(void);
int ipv6_route_open(struct inode *inode, struct file *file);
#ifdef CONFIG_IPV6_MULTIPLE_TABLES
int fib6_rules_init(void);
void fib6_rules_cleanup(void);