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-rw-r--r--net/ipv4/ip_fragment.c47
-rw-r--r--net/ipv4/sysctl_net_ipv4.c9
-rw-r--r--net/ipv6/netfilter/nf_conntrack_l3proto_ipv6.c7
-rw-r--r--net/ipv6/netfilter/nf_conntrack_reasm.c29
-rw-r--r--net/ipv6/reassembly.c25
-rw-r--r--net/ipv6/sysctl_net_ipv6.c9
6 files changed, 68 insertions, 58 deletions
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 321e694b72e8..0dd9a31df212 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 ipq {
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 @@ static unsigned int ipqhashfn(__be16 id, __be32 saddr, __be32 daddr, u8 prot)
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 @@ static void ipfrag_secret_rebuild(unsigned long dummy)
}
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 @@ static void ip_evictor(void)
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 @@ static struct ipq *ip_frag_intern(struct ipq *qp_in)
#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 @@ static int ip_frag_reinit(struct ipq *qp)
{
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 @@ int ip_defrag(struct sk_buff *skb, u32 user)
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 @@ void __init ipfrag_init(void)
{
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 eb286abcf5dc..c98ef16effd2 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_table ipv4_table[] = {
{
.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_table ipv4_table[] = {
{
.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_table ipv4_table[] = {
{
.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_table ipv4_table[] = {
{
.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 e9369dc02381..0e40948f4fc6 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 @@ static ctl_table nf_ct_ipv6_sysctl_table[] = {
{
.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 @@ static ctl_table nf_ct_ipv6_sysctl_table[] = {
{
.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 @@ static ctl_table nf_ct_ipv6_sysctl_table[] = {
{
.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 eb2ca1b7ddab..966a88848406 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 @@ struct nf_ct_frag6_queue
__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 @@ static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
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 @@ static void nf_ct_frag6_secret_rebuild(unsigned long dummy)
}
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 @@ static void nf_ct_frag6_evictor(void)
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 @@ static struct nf_ct_frag6_queue *nf_ct_frag6_intern(unsigned int hash,
#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 @@ struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb)
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_kfree_frags(struct sk_buff *skb)
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 @@ void nf_ct_frag6_cleanup(void)
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 ecf340047cde..ced1a5f5b776 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 @@ struct frag_queue
__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 @@ static unsigned int ip6qhashfn(__be32 id, struct in6_addr *saddr,
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 @@ static void ip6_frag_secret_rebuild(unsigned long dummy)
}
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 @@ static void ip6_evictor(struct inet6_dev *idev)
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 @@ static struct frag_queue *ip6_frag_intern(struct frag_queue *fq_in)
#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 @@ static int ipv6_frag_rcv(struct sk_buff **skbp)
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 @@ void __init ipv6_frag_init(void)
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 3fb44277207b..68bb2548e469 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 @@ static ctl_table ipv6_table[] = {
{
.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 @@ static ctl_table ipv6_table[] = {
{
.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 @@ static ctl_table ipv6_table[] = {
{
.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 @@ static ctl_table ipv6_table[] = {
{
.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,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-25 09:37:24 +0100