[INET]: Collect common frag sysctl variables together
Some sysctl variables are used to tune the frag queues
management and it will be useful to work with them in
a common way in the future, so move them into one
structure, moreover they are the same for all the frag
management codes.
I don't place them in the existing inet_frags object,
introduced in the previous patch for two reasons:
1. to keep them in the __read_mostly section;
2. not to export the whole inet_frags objects outside.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index ecf3400..ced1a5f 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -56,11 +56,6 @@
#include <net/addrconf.h>
#include <net/inet_frag.h>
-int sysctl_ip6frag_high_thresh __read_mostly = 256*1024;
-int sysctl_ip6frag_low_thresh __read_mostly = 192*1024;
-
-int sysctl_ip6frag_time __read_mostly = IPV6_FRAG_TIMEOUT;
-
struct ip6frag_skb_cb
{
struct inet6_skb_parm h;
@@ -87,6 +82,13 @@
__u16 nhoffset;
};
+struct inet_frags_ctl ip6_frags_ctl __read_mostly = {
+ .high_thresh = 256 * 1024,
+ .low_thresh = 192 * 1024,
+ .timeout = IPV6_FRAG_TIMEOUT,
+ .secret_interval = 10 * 60 * HZ,
+};
+
static struct inet_frags ip6_frags;
int ip6_frag_nqueues(void)
@@ -147,8 +149,6 @@
return c & (INETFRAGS_HASHSZ - 1);
}
-int sysctl_ip6frag_secret_interval __read_mostly = 10 * 60 * HZ;
-
static void ip6_frag_secret_rebuild(unsigned long dummy)
{
unsigned long now = jiffies;
@@ -177,7 +177,7 @@
}
write_unlock(&ip6_frags.lock);
- mod_timer(&ip6_frags.secret_timer, now + sysctl_ip6frag_secret_interval);
+ mod_timer(&ip6_frags.secret_timer, now + ip6_frags_ctl.secret_interval);
}
/* Memory Tracking Functions. */
@@ -256,7 +256,7 @@
struct list_head *tmp;
int work;
- work = atomic_read(&ip6_frags.mem) - sysctl_ip6frag_low_thresh;
+ work = atomic_read(&ip6_frags.mem) - ip6_frags_ctl.low_thresh;
if (work <= 0)
return;
@@ -348,7 +348,7 @@
#endif
fq = fq_in;
- if (!mod_timer(&fq->q.timer, jiffies + sysctl_ip6frag_time))
+ if (!mod_timer(&fq->q.timer, jiffies + ip6_frags_ctl.timeout))
atomic_inc(&fq->q.refcnt);
atomic_inc(&fq->q.refcnt);
@@ -754,7 +754,7 @@
return 1;
}
- if (atomic_read(&ip6_frags.mem) > sysctl_ip6frag_high_thresh)
+ if (atomic_read(&ip6_frags.mem) > ip6_frags_ctl.high_thresh)
ip6_evictor(ip6_dst_idev(skb->dst));
if ((fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr,
@@ -788,8 +788,9 @@
init_timer(&ip6_frags.secret_timer);
ip6_frags.secret_timer.function = ip6_frag_secret_rebuild;
- ip6_frags.secret_timer.expires = jiffies + sysctl_ip6frag_secret_interval;
+ ip6_frags.secret_timer.expires = jiffies + ip6_frags_ctl.secret_interval;
add_timer(&ip6_frags.secret_timer);
+ ip6_frags.ctl = &ip6_frags_ctl;
inet_frags_init(&ip6_frags);
}