rbd: include RADOS namespace in krbd symlinks

Fixes: https://tracker.ceph.com/issues/40247
Signed-off-by: Ilya Dryomov <[email protected]>

src/ceph-rbdnamer

@@ -3,10 +3,19 @@
 DEV=$1
 NUM=`echo $DEV | sed 's#p.*##g; s#[a-z]##g'`
 POOL=`cat /sys/devices/rbd/$NUM/pool`
+if [ -f /sys/devices/rbd/$NUM/pool_ns ]; then
+    NAMESPACE=`cat /sys/devices/rbd/$NUM/pool_ns`
+else
+    NAMESPACE=""
+fi
 IMAGE=`cat /sys/devices/rbd/$NUM/name`
 SNAP=`cat /sys/devices/rbd/$NUM/current_snap`
-if [ "$SNAP" = "-" ]; then
-	echo -n "$POOL $IMAGE"
-else
-	echo -n "$POOL $IMAGE@$SNAP"
+
+echo -n "$POOL"
+if [ -n "$NAMESPACE" ]; then
+    echo -n "/$NAMESPACE"
+fi
+echo -n "/$IMAGE"
+if [ "$SNAP" != "-" ]; then
+    echo -n "@$SNAP"
 fi

udev/50-rbd.rules

@@ -1,5 +1,5 @@
-KERNEL=="rbd[0-9]*", ENV{DEVTYPE}=="disk", PROGRAM="/usr/bin/ceph-rbdnamer %k", SYMLINK+="rbd/%c{1}/%c{2}"
-KERNEL=="rbd[0-9]*", ENV{DEVTYPE}=="partition", PROGRAM="/usr/bin/ceph-rbdnamer %k", SYMLINK+="rbd/%c{1}/%c{2}-part%n"
+KERNEL=="rbd[0-9]*", ENV{DEVTYPE}=="disk", PROGRAM="/usr/bin/ceph-rbdnamer %k", SYMLINK+="rbd/%c"
+KERNEL=="rbd[0-9]*", ENV{DEVTYPE}=="partition", PROGRAM="/usr/bin/ceph-rbdnamer %k", SYMLINK+="rbd/%c-part%n"
 
 # This is a placeholder, uncomment and edit as necessary
 #KERNEL=="rbd[0-9]*", ENV{DEVTYPE}=="disk", ACTION=="add|change", ATTR{bdi/read_ahead_kb}="128"