[XFRM]: Allow XFRM_ACQ_EXPIRES to be tunable via sysctl.

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 18 insertions, 6 deletions

diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index f34aca041a25..6d5ea9762040 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -25,6 +25,7 @@ extern int sysctl_core_destroy_delay;
 extern u32 sysctl_xfrm_aevent_etime;
 extern u32 sysctl_xfrm_aevent_rseqth;
 extern int sysctl_xfrm_larval_drop;
+extern u32 sysctl_xfrm_acq_expires;
 #endif
 
 ctl_table core_table[] = {
@@ -127,6 +128,14 @@ ctl_table core_table[] = {
                 .mode           = 0644,
                 .proc_handler   = &proc_dointvec
         },
+        {
+                .ctl_name       = CTL_UNNUMBERED,
+                .procname       = "xfrm_acq_expires",
+                .data           = &sysctl_xfrm_acq_expires,
+                .maxlen         = sizeof(int),
+                .mode           = 0644,
+                .proc_handler   = &proc_dointvec
+        },
 #endif /* CONFIG_XFRM */
 #endif /* CONFIG_NET */
         {
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 9955ff4da0a2..372f06eb8bb7 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -21,18 +21,21 @@
 #include <linux/cache.h>
 #include <asm/uaccess.h>
 #include <linux/audit.h>
+#include <linux/cache.h>
 
 #include "xfrm_hash.h"
 
 struct sock *xfrm_nl;
 EXPORT_SYMBOL(xfrm_nl);
 
-u32 sysctl_xfrm_aevent_etime = XFRM_AE_ETIME;
+u32 sysctl_xfrm_aevent_etime __read_mostly = XFRM_AE_ETIME;
 EXPORT_SYMBOL(sysctl_xfrm_aevent_etime);
 
-u32 sysctl_xfrm_aevent_rseqth = XFRM_AE_SEQT_SIZE;
+u32 sysctl_xfrm_aevent_rseqth __read_mostly = XFRM_AE_SEQT_SIZE;
 EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth);
 
+u32 sysctl_xfrm_acq_expires __read_mostly = 30;
+
 /* Each xfrm_state may be linked to two tables:
 
    1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
@@ -622,8 +625,8 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
                                 h = xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, family);
                                 hlist_add_head(&x->byspi, xfrm_state_byspi+h);
                         }
-                        x->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
-                        x->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
+                        x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
+                        x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
                         add_timer(&x->timer);
                         xfrm_state_num++;
                         xfrm_hash_grow_check(x->bydst.next != NULL);
@@ -772,9 +775,9 @@ static struct xfrm_state *__find_acq_core(unsigned short family, u8 mode, u32 re
                 x->props.family = family;
                 x->props.mode = mode;
                 x->props.reqid = reqid;
-                x->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
+                x->lft.hard_add_expires_seconds = sysctl_xfrm_acq_expires;
                 xfrm_state_hold(x);
-                x->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
+                x->timer.expires = jiffies + sysctl_xfrm_acq_expires*HZ;
                 add_timer(&x->timer);
                 hlist_add_head(&x->bydst, xfrm_state_bydst+h);
                 h = xfrm_src_hash(daddr, saddr, family);