netfilter: xtables: Add snapshot of hardidletimer target
This is a snapshot of hardifletimer netfilter target as of msm-4.4
commit 469a150b7426 ("netfilter: xtables: hardidletimer target implementation")
This patch implements a hardidletimer Xtables target that can be
used to identify when interfaces have been idle for a certain period
of time.
Timers are identified by labels and are created when a rule is set
with a new label. The rules also take a timeout value (in seconds) as
an option. If more than one rule uses the same timer label, the timer
will be restarted whenever any of the rules get a hit.
One entry for each timer is created in sysfs. This attribute contains
the timer remaining for the timer to expire. The attributes are
located under the xt_idletimer class:
/sys/class/xt_hardidletimer/timers/<label>
When the timer expires, the target module sends a sysfs notification
to the userspace, which can then decide what to do (eg. disconnect to
save power)
Compared to xt_IDLETIMER, xt_HARDIDLETIMER can send notifications when
CPU is in suspend too, to notify the timer expiry.
CRs-Fixed: 1078373
Change-Id: Ib2e05af7267f3c86d1967f149f7e7e782c59807e
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 54ba5aa..8b29a57 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -133,6 +133,7 @@
obj-$(CONFIG_NETFILTER_XT_TARGET_TEE) += xt_TEE.o
obj-$(CONFIG_NETFILTER_XT_TARGET_TRACE) += xt_TRACE.o
obj-$(CONFIG_NETFILTER_XT_TARGET_IDLETIMER) += xt_IDLETIMER.o
+obj-$(CONFIG_NETFILTER_XT_TARGET_HARDIDLETIMER) += xt_HARDIDLETIMER.o
# matches
obj-$(CONFIG_NETFILTER_XT_MATCH_ADDRTYPE) += xt_addrtype.o