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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-02-07 10:40:19 +0100 |
|---|---|---|
| committer | YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> | 2008-03-04 15:18:21 +0900 |
| commit | 11baab7ac34723ad481e0f97fca733272ef364d4 (patch) | |
| tree | 611ed2f14f6e3c9d36d748094e4c9c736caa699b /net/ipv4/syncookies.c | |
| parent | 988b705077d8f922408913f4f521ae073256d4a1 (diff) | |
| download | linux-stable-11baab7ac34723ad481e0f97fca733272ef364d4.tar.gz linux-stable-11baab7ac34723ad481e0f97fca733272ef364d4.tar.bz2 linux-stable-11baab7ac34723ad481e0f97fca733272ef364d4.zip | |
[TCP]: lower stack usage in cookie_hash() function
400 bytes allocated on stack might be a litle bit too much. Using a
per_cpu var is more friendly.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Diffstat (limited to 'net/ipv4/syncookies.c')
| -rw-r--r-- | net/ipv4/syncookies.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c index f470fe4511db..177da14f6b14 100644 --- a/net/ipv4/syncookies.c +++ b/net/ipv4/syncookies.c @@ -35,10 +35,12 @@ module_init(init_syncookies); #define COOKIEBITS 24 /* Upper bits store count */ #define COOKIEMASK (((__u32)1 << COOKIEBITS) - 1) +static DEFINE_PER_CPU(__u32, cookie_scratch)[16 + 5 + SHA_WORKSPACE_WORDS]; + static u32 cookie_hash(__be32 saddr, __be32 daddr, __be16 sport, __be16 dport, u32 count, int c) { - __u32 tmp[16 + 5 + SHA_WORKSPACE_WORDS]; + __u32 *tmp = __get_cpu_var(cookie_scratch); memcpy(tmp + 3, syncookie_secret[c], sizeof(syncookie_secret[c])); tmp[0] = (__force u32)saddr; |