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authorHerbert Xu <herbert@gondor.apana.org.au>2008-02-28 11:23:17 -0800
committerDavid S. Miller <davem@davemloft.net>2008-02-28 11:23:17 -0800
commit21e43188f272c7fd9efc84b8244c0b1dfccaa105 (patch)
treead0313f88c3abe948e5a5ec61fd404a5cbfd2972 /net
parent60717f7e761ca04925d17e90e556e689ab134cdc (diff)
downloadop-kernel-dev-21e43188f272c7fd9efc84b8244c0b1dfccaa105.zip
op-kernel-dev-21e43188f272c7fd9efc84b8244c0b1dfccaa105.tar.gz
[IPCOMP]: Disable BH on output when using shared tfm
Because we use shared tfm objects in order to conserve memory, (each tfm requires 128K of vmalloc memory), BH needs to be turned off on output as that can occur in process context. Previously this was done implicitly by the xfrm output code. That was lost when it became lockless. So we need to add the BH disabling to IPComp directly. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/ipcomp.c5
-rw-r--r--net/ipv6/ipcomp6.c2
2 files changed, 6 insertions, 1 deletions
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index ae1f45f..58b60b2 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -108,8 +108,11 @@ static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb)
const int cpu = get_cpu();
u8 *scratch = *per_cpu_ptr(ipcomp_scratches, cpu);
struct crypto_comp *tfm = *per_cpu_ptr(ipcd->tfms, cpu);
- int err = crypto_comp_compress(tfm, start, plen, scratch, &dlen);
+ int err;
+ local_bh_disable();
+ err = crypto_comp_compress(tfm, start, plen, scratch, &dlen);
+ local_bh_enable();
if (err)
goto out;
diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c
index b900395..e3dcfa2 100644
--- a/net/ipv6/ipcomp6.c
+++ b/net/ipv6/ipcomp6.c
@@ -146,7 +146,9 @@ static int ipcomp6_output(struct xfrm_state *x, struct sk_buff *skb)
scratch = *per_cpu_ptr(ipcomp6_scratches, cpu);
tfm = *per_cpu_ptr(ipcd->tfms, cpu);
+ local_bh_disable();
err = crypto_comp_compress(tfm, start, plen, scratch, &dlen);
+ local_bh_enable();
if (err || (dlen + sizeof(*ipch)) >= plen) {
put_cpu();
goto out_ok;
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