qa: add test for mapping and unmapping from a network namespace

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
(cherry picked from commit d2884adb1542de7a43f82eb899056aa74de95052)

diff --git a/qa/suites/krbd/rbd-nomount/tasks/krbd_udev_netns.yaml b/qa/suites/krbd/rbd-nomount/tasks/krbd_udev_netns.yaml
new file mode 100644 (file)
index 0000000..21e06e3
--- /dev/null
+++ b/qa/suites/krbd/rbd-nomount/tasks/krbd_udev_netns.yaml
@@ -0,0 +1,5 @@
+tasks:
+- workunit:
+    clients:
+      all:
+        - rbd/krbd_udev_netns.sh

diff --git a/qa/workunits/rbd/krbd_udev_netns.sh b/qa/workunits/rbd/krbd_udev_netns.sh
new file mode 100755 (executable)
index 0000000..e746a68
--- /dev/null
+++ b/qa/workunits/rbd/krbd_udev_netns.sh
@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+
+set -ex
+
+sudo ip netns add ns1
+sudo ip link add veth1-ext type veth peer name veth1-int
+sudo ip link set veth1-int netns ns1
+
+sudo ip netns exec ns1 ip link set dev lo up
+sudo ip netns exec ns1 ip addr add 192.168.1.2/24 dev veth1-int
+sudo ip netns exec ns1 ip link set veth1-int up
+sudo ip netns exec ns1 ip route add default via 192.168.1.1
+
+sudo ip addr add 192.168.1.1/24 dev veth1-ext
+sudo ip link set veth1-ext up
+
+# Enable forwarding between the namespace and the default route
+# interface and set up NAT.  In case of multiple default routes,
+# just pick the first one.
+if [[ $(sysctl -n net.ipv4.ip_forward) -eq 0 ]]; then
+    sudo iptables -P FORWARD DROP
+    sudo sysctl -w net.ipv4.ip_forward=1
+fi
+IFACE="$(ip route list 0.0.0.0/0 | head -n 1 | cut -d ' ' -f 5)"
+sudo iptables -A FORWARD -i veth1-ext -o "$IFACE" -j ACCEPT
+sudo iptables -A FORWARD -i "$IFACE" -o veth1-ext -j ACCEPT
+sudo iptables -t nat -A POSTROUTING -s 192.168.1.2 -o "$IFACE" -j MASQUERADE
+
+rbd create --size 300 img
+
+DEV="$(sudo rbd map img)"
+mkfs.ext4 "$DEV"
+sudo mount "$DEV" /mnt
+sudo umount /mnt
+sudo rbd unmap "$DEV"
+
+sudo ip netns exec ns1 bash <<'EOF'
+
+set -ex
+
+DEV="/dev/rbd/rbd/img"
+[[ ! -e "$DEV" ]]
+
+# In a network namespace, "rbd map" maps the device and hangs waiting
+# for udev add uevents.  udev runs as usual (in particular creating the
+# symlink which is used here because the device node is never printed),
+# but the uevents it sends out never come because they don't cross
+# network namespace boundaries.
+set +e
+timeout 30s rbd map img
+RET=$?
+set -e
+[[ $RET -eq 124 ]]
+[[ -L "$DEV" ]]
+mkfs.ext4 -F "$DEV"
+mount "$DEV" /mnt
+umount /mnt
+
+# In a network namespace, "rbd unmap" unmaps the device and hangs
+# waiting for udev remove uevents.  udev runs as usual (removing the
+# symlink), but the uevents it sends out never come because they don't
+# cross network namespace boundaries.
+set +e
+timeout 30s rbd unmap "$DEV"
+RET=$?
+set -e
+[[ $RET -eq 124 ]]
+[[ ! -e "$DEV" ]]
+
+# Skip waiting for udev uevents with "-o noudev".
+DEV="$(rbd map -o noudev img)"
+mkfs.ext4 -F "$DEV"
+mount "$DEV" /mnt
+umount /mnt
+rbd unmap -o noudev "$DEV"
+
+EOF
+
+rbd rm img
+
+sudo iptables -t nat -D POSTROUTING -s 192.168.1.2 -o "$IFACE" -j MASQUERADE
+sudo iptables -D FORWARD -i "$IFACE" -o veth1-ext -j ACCEPT
+sudo iptables -D FORWARD -i veth1-ext -o "$IFACE" -j ACCEPT
+sudo ip netns delete ns1
+
+echo OK