[PATCH v3 1/3] ltq-dsl-base: only lock the dsl pipe once for all stats

[Andre Heider]

Instead of locking/unlocking it for every command.

Reduces the runtime for the dslstat/lucistat commands to ~66%.

Before:
real	0m 2.66s
user	0m 0.90s
sys	0m 1.76s

After:
real	0m 1.76s
user	0m 0.63s
sys	0m 1.13s

Signed-off-by: Andre Heider <a.heider at gmail.com>
---
v2: bump PKG_RELEASE
v3: use flock style suggested by Jo, bump release in different patch

 .../files/lib/functions/lantiq_dsl.sh         | 35 ++++++++++---------
 1 file changed, 18 insertions(+), 17 deletions(-)

diff --git a/package/network/utils/ltq-dsl-base/files/lib/functions/lantiq_dsl.sh b/package/network/utils/ltq-dsl-base/files/lib/functions/lantiq_dsl.sh
index 5842a7879f..1a28633c79 100755
--- a/package/network/utils/ltq-dsl-base/files/lib/functions/lantiq_dsl.sh
+++ b/package/network/utils/ltq-dsl-base/files/lib/functions/lantiq_dsl.sh
@@ -11,12 +11,8 @@ fi
 # Basic functions to send CLI commands to the vdsl_cpe_control daemon
 #
 dsl_cmd() {
-	killall -q -0 ${XDSL_CTRL} && (
-		lock /var/lock/dsl_pipe
-		echo "$@" > /tmp/pipe/dsl_cpe0_cmd
-		cat /tmp/pipe/dsl_cpe0_ack
-		lock -u /var/lock/dsl_pipe
-	)
+	echo "$@" > /tmp/pipe/dsl_cpe0_cmd
+	cat /tmp/pipe/dsl_cpe0_ack
 }
 dsl_val() {
 	expr "$1" : '.*'$2'=\([-\.[:alnum:]]*\).*'
@@ -729,17 +725,22 @@ profile() {
 }
 
 dslstat() {
-	vendor
-	chipset
-	xtse
-	profile
-	line_state
-	errors
-	power_mode
-	latency_delay
-	data_rates
-	line_data
-	line_uptime
+	killall -q -0 ${XDSL_CTRL} || exit 1
+	(
+		flock -x 323
+
+		vendor
+		chipset
+		xtse
+		profile
+		line_state
+		errors
+		power_mode
+		latency_delay
+		data_rates
+		line_data
+		line_uptime
+	) 323> /var/lock/dsl_pipe
 }
 
 lucistat() {
-- 
2.29.2