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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_hash.c | |
| parent | 3d36696024499aef19dbf24a781e91a24fbbe4af (diff) | |
| download | linux-5e659e4cb0eedacdc1f621a61e400a4611ddef8a.tar.bz2 | |
[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_hash.c')
| -rw-r--r-- | net/ipv4/fib_hash.c | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/net/ipv4/fib_hash.c b/net/ipv4/fib_hash.c index 02088deb0461..2e2fc3376ac9 100644 --- a/net/ipv4/fib_hash.c +++ b/net/ipv4/fib_hash.c @@ -1003,7 +1003,7 @@ static unsigned fib_flag_trans(int type, __be32 mask, struct fib_info *fi) static int fib_seq_show(struct seq_file *seq, void *v) { struct fib_iter_state *iter; - char bf[128]; + int len; __be32 prefix, mask; unsigned flags; struct fib_node *f; @@ -1025,18 +1025,19 @@ static int fib_seq_show(struct seq_file *seq, void *v) mask = FZ_MASK(iter->zone); flags = fib_flag_trans(fa->fa_type, mask, fi); 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, fi->fib_priority, mask, (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", - prefix, 0, flags, 0, 0, 0, mask, 0, 0, 0); - seq_printf(seq, "%-127s\n", bf); + 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, &len); + + seq_printf(seq, "%*s\n", 127 - len, ""); out: return 0; } |