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authorPavel Emelyanov <xemul@openvz.org>2008-01-22 06:10:13 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-28 15:10:38 -0800
commite31e0bdc7e7fb9a4b09d2f3266c035a18fdcee9d (patch)
tree30e25f733781cf80aa9fef0d58ff3476424cb9b3 /net/ipv4/ip_fragment.c
parentb2fd5321dd160ef309dfb6cfc78ed8de4a830659 (diff)
[NETNS][FRAGS]: Make thresholds work in namespaces.
This is the same as with the timeout variable. Currently, after exceeding the high threshold _all_ the fragments are evicted, but it will be fixed in later patch. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_fragment.c')
-rw-r--r--net/ipv4/ip_fragment.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 70d241c8d2a8..80c2c19196cd 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -75,14 +75,6 @@ struct ipq {
};
static struct inet_frags_ctl ip4_frags_ctl __read_mostly = {
- /*
- * Fragment cache limits. We will commit 256K at one time. Should we
- * cross that limit we will prune down to 192K. This should cope with
- * even the most extreme cases without allowing an attacker to
- * measurably harm machine performance.
- */
- .high_thresh = 256 * 1024,
- .low_thresh = 192 * 1024,
.secret_interval = 10 * 60 * HZ,
};
@@ -582,7 +574,7 @@ int ip_defrag(struct sk_buff *skb, u32 user)
net = skb->dev->nd_net;
/* Start by cleaning up the memory. */
- if (atomic_read(&net->ipv4.frags.mem) > ip4_frags_ctl.high_thresh)
+ if (atomic_read(&net->ipv4.frags.mem) > net->ipv4.frags.high_thresh)
ip_evictor(net);
/* Lookup (or create) queue header */
@@ -610,7 +602,7 @@ static struct ctl_table ip4_frags_ctl_table[] = {
{
.ctl_name = NET_IPV4_IPFRAG_HIGH_THRESH,
.procname = "ipfrag_high_thresh",
- .data = &ip4_frags_ctl.high_thresh,
+ .data = &init_net.ipv4.frags.high_thresh,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
@@ -618,7 +610,7 @@ static struct ctl_table ip4_frags_ctl_table[] = {
{
.ctl_name = NET_IPV4_IPFRAG_LOW_THRESH,
.procname = "ipfrag_low_thresh",
- .data = &ip4_frags_ctl.low_thresh,
+ .data = &init_net.ipv4.frags.low_thresh,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
@@ -663,8 +655,8 @@ static int ip4_frags_ctl_register(struct net *net)
if (table == NULL)
goto err_alloc;
- table[0].mode &= ~0222;
- table[1].mode &= ~0222;
+ table[0].data = &net->ipv4.frags.high_thresh;
+ table[1].data = &net->ipv4.frags.low_thresh;
table[2].data = &net->ipv4.frags.timeout;
table[3].mode &= ~0222;
table[4].mode &= ~0222;
@@ -706,6 +698,14 @@ static inline void ip4_frags_ctl_unregister(struct net *net)
static int ipv4_frags_init_net(struct net *net)
{
/*
+ * Fragment cache limits. We will commit 256K at one time. Should we
+ * cross that limit we will prune down to 192K. This should cope with
+ * even the most extreme cases without allowing an attacker to
+ * measurably harm machine performance.
+ */
+ net->ipv4.frags.high_thresh = 256 * 1024;
+ net->ipv4.frags.low_thresh = 192 * 1024;
+ /*
* Important NOTE! Fragment queue must be destroyed before MSL expires.
* RFC791 is wrong proposing to prolongate timer each fragment arrival
* by TTL.