[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/include/net/inet_frag.h b/include/net/inet_frag.h
index d51f238..ada03ba 100644
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -20,6 +20,13 @@
#define INETFRAGS_HASHSZ 64
+struct inet_frags_ctl {
+ int high_thresh;
+ int low_thresh;
+ int timeout;
+ int secret_interval;
+};
+
struct inet_frags {
struct list_head lru_list;
struct hlist_head hash[INETFRAGS_HASHSZ];
@@ -28,6 +35,7 @@
int nqueues;
atomic_t mem;
struct timer_list secret_timer;
+ struct inet_frags_ctl *ctl;
};
void inet_frags_init(struct inet_frags *);
diff --git a/include/net/ip.h b/include/net/ip.h
index c08c59e..e6aa955 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -177,10 +177,8 @@
extern int sysctl_ip_nonlocal_bind;
/* From ip_fragment.c */
-extern int sysctl_ipfrag_high_thresh;
-extern int sysctl_ipfrag_low_thresh;
-extern int sysctl_ipfrag_time;
-extern int sysctl_ipfrag_secret_interval;
+struct inet_frags_ctl;
+extern struct inet_frags_ctl ip4_frags_ctl;
extern int sysctl_ipfrag_max_dist;
/* From inetpeer.c */
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 77cdab3..b29d76c 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -565,10 +565,8 @@
/*
* reassembly.c
*/
-extern int sysctl_ip6frag_high_thresh;
-extern int sysctl_ip6frag_low_thresh;
-extern int sysctl_ip6frag_time;
-extern int sysctl_ip6frag_secret_interval;
+struct inet_frags_ctl;
+extern struct inet_frags_ctl ip6_frags_ctl;
extern const struct proto_ops inet6_stream_ops;
extern const struct proto_ops inet6_dgram_ops;
diff --git a/include/net/netfilter/ipv6/nf_conntrack_ipv6.h b/include/net/netfilter/ipv6/nf_conntrack_ipv6.h
index 070d12c..f703533 100644
--- a/include/net/netfilter/ipv6/nf_conntrack_ipv6.h
+++ b/include/net/netfilter/ipv6/nf_conntrack_ipv6.h
@@ -15,8 +15,7 @@
struct net_device *out,
int (*okfn)(struct sk_buff *));
-extern unsigned int nf_ct_frag6_timeout;
-extern unsigned int nf_ct_frag6_low_thresh;
-extern unsigned int nf_ct_frag6_high_thresh;
+struct inet_frags_ctl;
+extern struct inet_frags_ctl nf_frags_ctl;
#endif /* _NF_CONNTRACK_IPV6_H*/
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 321e694b..0dd9a31 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -50,21 +50,8 @@
* as well. Or notify me, at least. --ANK
*/
-/* 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.
- */
-int sysctl_ipfrag_high_thresh __read_mostly = 256*1024;
-int sysctl_ipfrag_low_thresh __read_mostly = 192*1024;
-
int sysctl_ipfrag_max_dist __read_mostly = 64;
-/* Important NOTE! Fragment queue must be destroyed before MSL expires.
- * RFC791 is wrong proposing to prolongate timer each fragment arrival by TTL.
- */
-int sysctl_ipfrag_time __read_mostly = IP_FRAG_TIME;
-
struct ipfrag_skb_cb
{
struct inet_skb_parm h;
@@ -87,6 +74,25 @@
struct inet_peer *peer;
};
+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,
+
+ /*
+ * Important NOTE! Fragment queue must be destroyed before MSL expires.
+ * RFC791 is wrong proposing to prolongate timer each fragment arrival
+ * by TTL.
+ */
+ .timeout = IP_FRAG_TIME,
+ .secret_interval = 10 * 60 * HZ,
+};
+
static struct inet_frags ip4_frags;
int ip_frag_nqueues(void)
@@ -123,8 +129,6 @@
ip4_frags.rnd) & (INETFRAGS_HASHSZ - 1);
}
-int sysctl_ipfrag_secret_interval __read_mostly = 10 * 60 * HZ;
-
static void ipfrag_secret_rebuild(unsigned long dummy)
{
unsigned long now = jiffies;
@@ -150,7 +154,7 @@
}
write_unlock(&ip4_frags.lock);
- mod_timer(&ip4_frags.secret_timer, now + sysctl_ipfrag_secret_interval);
+ mod_timer(&ip4_frags.secret_timer, now + ip4_frags_ctl.secret_interval);
}
/* Memory Tracking Functions. */
@@ -237,7 +241,7 @@
struct list_head *tmp;
int work;
- work = atomic_read(&ip4_frags.mem) - sysctl_ipfrag_low_thresh;
+ work = atomic_read(&ip4_frags.mem) - ip4_frags_ctl.low_thresh;
if (work <= 0)
return;
@@ -326,7 +330,7 @@
#endif
qp = qp_in;
- if (!mod_timer(&qp->q.timer, jiffies + sysctl_ipfrag_time))
+ if (!mod_timer(&qp->q.timer, jiffies + ip4_frags_ctl.timeout))
atomic_inc(&qp->q.refcnt);
atomic_inc(&qp->q.refcnt);
@@ -432,7 +436,7 @@
{
struct sk_buff *fp;
- if (!mod_timer(&qp->q.timer, jiffies + sysctl_ipfrag_time)) {
+ if (!mod_timer(&qp->q.timer, jiffies + ip4_frags_ctl.timeout)) {
atomic_inc(&qp->q.refcnt);
return -ETIMEDOUT;
}
@@ -733,7 +737,7 @@
IP_INC_STATS_BH(IPSTATS_MIB_REASMREQDS);
/* Start by cleaning up the memory. */
- if (atomic_read(&ip4_frags.mem) > sysctl_ipfrag_high_thresh)
+ if (atomic_read(&ip4_frags.mem) > ip4_frags_ctl.high_thresh)
ip_evictor();
/* Lookup (or create) queue header */
@@ -758,9 +762,10 @@
{
init_timer(&ip4_frags.secret_timer);
ip4_frags.secret_timer.function = ipfrag_secret_rebuild;
- ip4_frags.secret_timer.expires = jiffies + sysctl_ipfrag_secret_interval;
+ ip4_frags.secret_timer.expires = jiffies + ip4_frags_ctl.secret_interval;
add_timer(&ip4_frags.secret_timer);
+ ip4_frags.ctl = &ip4_frags_ctl;
inet_frags_init(&ip4_frags);
}
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index eb286ab..c98ef16 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -19,6 +19,7 @@
#include <net/route.h>
#include <net/tcp.h>
#include <net/cipso_ipv4.h>
+#include <net/inet_frag.h>
/* From af_inet.c */
extern int sysctl_ip_nonlocal_bind;
@@ -357,7 +358,7 @@
{
.ctl_name = NET_IPV4_IPFRAG_HIGH_THRESH,
.procname = "ipfrag_high_thresh",
- .data = &sysctl_ipfrag_high_thresh,
+ .data = &ip4_frags_ctl.high_thresh,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
@@ -365,7 +366,7 @@
{
.ctl_name = NET_IPV4_IPFRAG_LOW_THRESH,
.procname = "ipfrag_low_thresh",
- .data = &sysctl_ipfrag_low_thresh,
+ .data = &ip4_frags_ctl.low_thresh,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
@@ -381,7 +382,7 @@
{
.ctl_name = NET_IPV4_IPFRAG_TIME,
.procname = "ipfrag_time",
- .data = &sysctl_ipfrag_time,
+ .data = &ip4_frags_ctl.timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@@ -732,7 +733,7 @@
{
.ctl_name = NET_IPV4_IPFRAG_SECRET_INTERVAL,
.procname = "ipfrag_secret_interval",
- .data = &sysctl_ipfrag_secret_interval,
+ .data = &ip4_frags_ctl.secret_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
diff --git a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
index e9369dc..0e40948 100644
--- a/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
+++ b/net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c
@@ -18,6 +18,7 @@
#include <linux/icmp.h>
#include <linux/sysctl.h>
#include <net/ipv6.h>
+#include <net/inet_frag.h>
#include <linux/netfilter_ipv6.h>
#include <net/netfilter/nf_conntrack.h>
@@ -307,7 +308,7 @@
{
.ctl_name = NET_NF_CONNTRACK_FRAG6_TIMEOUT,
.procname = "nf_conntrack_frag6_timeout",
- .data = &nf_ct_frag6_timeout,
+ .data = &nf_frags_ctl.timeout,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@@ -315,7 +316,7 @@
{
.ctl_name = NET_NF_CONNTRACK_FRAG6_LOW_THRESH,
.procname = "nf_conntrack_frag6_low_thresh",
- .data = &nf_ct_frag6_low_thresh,
+ .data = &nf_frags_ctl.low_thresh,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec,
@@ -323,7 +324,7 @@
{
.ctl_name = NET_NF_CONNTRACK_FRAG6_HIGH_THRESH,
.procname = "nf_conntrack_frag6_high_thresh",
- .data = &nf_ct_frag6_high_thresh,
+ .data = &nf_frags_ctl.high_thresh,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = &proc_dointvec,
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index eb2ca1b..966a888 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -49,10 +49,6 @@
#define NF_CT_FRAG6_LOW_THRESH 196608 /* == 192*1024 */
#define NF_CT_FRAG6_TIMEOUT IPV6_FRAG_TIMEOUT
-unsigned int nf_ct_frag6_high_thresh __read_mostly = 256*1024;
-unsigned int nf_ct_frag6_low_thresh __read_mostly = 192*1024;
-unsigned long nf_ct_frag6_timeout __read_mostly = IPV6_FRAG_TIMEOUT;
-
struct nf_ct_frag6_skb_cb
{
struct inet6_skb_parm h;
@@ -74,6 +70,13 @@
__u16 nhoffset;
};
+struct inet_frags_ctl nf_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 nf_frags;
static __inline__ void __fq_unlink(struct nf_ct_frag6_queue *fq)
@@ -117,8 +120,6 @@
return c & (INETFRAGS_HASHSZ - 1);
}
-int nf_ct_frag6_secret_interval = 10 * 60 * HZ;
-
static void nf_ct_frag6_secret_rebuild(unsigned long dummy)
{
unsigned long now = jiffies;
@@ -144,7 +145,7 @@
}
write_unlock(&nf_frags.lock);
- mod_timer(&nf_frags.secret_timer, now + nf_ct_frag6_secret_interval);
+ mod_timer(&nf_frags.secret_timer, now + nf_frags_ctl.secret_interval);
}
/* Memory Tracking Functions. */
@@ -229,10 +230,10 @@
unsigned int work;
work = atomic_read(&nf_frags.mem);
- if (work <= nf_ct_frag6_low_thresh)
+ if (work <= nf_frags_ctl.low_thresh)
return;
- work -= nf_ct_frag6_low_thresh;
+ work -= nf_frags_ctl.low_thresh;
while (work > 0) {
read_lock(&nf_frags.lock);
if (list_empty(&nf_frags.lru_list)) {
@@ -296,7 +297,7 @@
#endif
fq = fq_in;
- if (!mod_timer(&fq->q.timer, jiffies + nf_ct_frag6_timeout))
+ if (!mod_timer(&fq->q.timer, jiffies + nf_frags_ctl.timeout))
atomic_inc(&fq->q.refcnt);
atomic_inc(&fq->q.refcnt);
@@ -766,7 +767,7 @@
goto ret_orig;
}
- if (atomic_read(&nf_frags.mem) > nf_ct_frag6_high_thresh)
+ if (atomic_read(&nf_frags.mem) > nf_frags_ctl.high_thresh)
nf_ct_frag6_evictor();
fq = fq_find(fhdr->identification, &hdr->saddr, &hdr->daddr);
@@ -838,10 +839,10 @@
int nf_ct_frag6_init(void)
{
setup_timer(&nf_frags.secret_timer, nf_ct_frag6_secret_rebuild, 0);
- nf_frags.secret_timer.expires = jiffies
- + nf_ct_frag6_secret_interval;
+ nf_frags.secret_timer.expires = jiffies + nf_frags_ctl.secret_interval;
add_timer(&nf_frags.secret_timer);
+ nf_frags.ctl = &nf_frags_ctl;
inet_frags_init(&nf_frags);
return 0;
@@ -852,6 +853,6 @@
inet_frags_fini(&nf_frags);
del_timer(&nf_frags.secret_timer);
- nf_ct_frag6_low_thresh = 0;
+ nf_frags_ctl.low_thresh = 0;
nf_ct_frag6_evictor();
}
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);
}
diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index 3fb4427..68bb254 100644
--- a/net/ipv6/sysctl_net_ipv6.c
+++ b/net/ipv6/sysctl_net_ipv6.c
@@ -12,6 +12,7 @@
#include <net/ndisc.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
+#include <net/inet_frag.h>
#ifdef CONFIG_SYSCTL
@@ -41,7 +42,7 @@
{
.ctl_name = NET_IPV6_IP6FRAG_HIGH_THRESH,
.procname = "ip6frag_high_thresh",
- .data = &sysctl_ip6frag_high_thresh,
+ .data = &ip6_frags_ctl.high_thresh,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
@@ -49,7 +50,7 @@
{
.ctl_name = NET_IPV6_IP6FRAG_LOW_THRESH,
.procname = "ip6frag_low_thresh",
- .data = &sysctl_ip6frag_low_thresh,
+ .data = &ip6_frags_ctl.low_thresh,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec
@@ -57,7 +58,7 @@
{
.ctl_name = NET_IPV6_IP6FRAG_TIME,
.procname = "ip6frag_time",
- .data = &sysctl_ip6frag_time,
+ .data = &ip6_frags_ctl.timeout,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
@@ -66,7 +67,7 @@
{
.ctl_name = NET_IPV6_IP6FRAG_SECRET_INTERVAL,
.procname = "ip6frag_secret_interval",
- .data = &sysctl_ip6frag_secret_interval,
+ .data = &ip6_frags_ctl.secret_interval,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_jiffies,
