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| author | Pavel Emelyanov <xemul@openvz.org> | 2008-04-24 01:02:16 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-04-24 01:02:16 -0700 |
| commit | 5e659e4cb0eedacdc1f621a61e400a4611ddef8a (patch) | |
| tree | fa3c8743010dd640c48584a6fa8a910d27350c01 /net/ipv4/fib_trie.c | |
| parent | 3d36696024499aef19dbf24a781e91a24fbbe4af (diff) | |
| download | lwn-5e659e4cb0eedacdc1f621a61e400a4611ddef8a.tar.gz lwn-5e659e4cb0eedacdc1f621a61e400a4611ddef8a.zip | |
[NET]: Fix heavy stack usage in seq_file output routines.
Plan C: we can follow the Al Viro's proposal about %n like in this patch.
The same applies to udp, fib (the /proc/net/route file), rt_cache and
sctp debug. This is minus ~150-200 bytes for each.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/fib_trie.c')
| -rw-r--r-- | net/ipv4/fib_trie.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c index ea294fffb9ce..4b02d14e7ab9 100644 --- a/net/ipv4/fib_trie.c +++ b/net/ipv4/fib_trie.c @@ -2602,15 +2602,16 @@ static int fib_route_seq_show(struct seq_file *seq, void *v) list_for_each_entry_rcu(fa, &li->falh, fa_list) { const struct fib_info *fi = fa->fa_info; unsigned flags = fib_flag_trans(fa->fa_type, mask, fi); - char bf[128]; + int len; if (fa->fa_type == RTN_BROADCAST || fa->fa_type == RTN_MULTICAST) continue; if (fi) - snprintf(bf, sizeof(bf), - "%s\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u", + seq_printf(seq, + "%s\t%08X\t%08X\t%04X\t%d\t%u\t" + "%d\t%08X\t%d\t%u\t%u%n", fi->fib_dev ? fi->fib_dev->name : "*", prefix, fi->fib_nh->nh_gw, flags, 0, 0, @@ -2619,14 +2620,15 @@ static int fib_route_seq_show(struct seq_file *seq, void *v) (fi->fib_advmss ? fi->fib_advmss + 40 : 0), fi->fib_window, - fi->fib_rtt >> 3); + fi->fib_rtt >> 3, &len); else - snprintf(bf, sizeof(bf), - "*\t%08X\t%08X\t%04X\t%d\t%u\t%d\t%08X\t%d\t%u\t%u", + seq_printf(seq, + "*\t%08X\t%08X\t%04X\t%d\t%u\t" + "%d\t%08X\t%d\t%u\t%u%n", prefix, 0, flags, 0, 0, 0, - mask, 0, 0, 0); + mask, 0, 0, 0, &len); - seq_printf(seq, "%-127s\n", bf); + seq_printf(seq, "%*s\n", 127 - len, ""); } } |