[Devel] [PATCH libvzctl] scripts: Allow to r/w on old ploop instances in devtmpfs

[Cyrill Gorcunov]

https://jira.sw.ru/browse/PSBM-47753

Signed-off-by: Cyrill Gorcunov <gorcunov at openvz.org>
---
 scripts/vz-rst-action.in | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/scripts/vz-rst-action.in b/scripts/vz-rst-action.in
index c910677..697c25b 100755
--- a/scripts/vz-rst-action.in
+++ b/scripts/vz-rst-action.in
@@ -79,6 +79,18 @@ case "$CRTOOLS_SCRIPT_ACTION" in
 "post-setup-namespaces")
 	restore_devices
 	if [ -n "$VEID" ]; then
+		#
+		# Temp fix for https://jira.sw.ru/browse/PSBM-47753
+		# The ploop device is changing his minor when migrating
+		# from one machine to another.
+		#
+		# Lets simply allow to read/write into ploops inside
+		# container (each container carries own devtpmfs so
+		# can't access to other's ploop instaces). Otherwise
+		# when we're restoring inotify wathees over container
+		# root which has been on "old" ploop instace, the
+		# kernel prevents us to do so stopping the migration.
+		echo "b 182:* rw" > /sys/fs/cgroup/devices/$VEID/devices.allow
 		[ -n "$VE_OS_RELEASE" ] && cgset -r ve.os_release="$VE_OS_RELEASE" $VEID
 	fi
 	;;
-- 
2.5.5