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dom0: Use /var/run/xen-hotplug to store information needed for block devices cleanup.

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Libxl removes xenstore entries before udev (+scripts) have chance to read it.
This commit is contained in:
Marek Marczykowski 2011-06-09 14:06:24 +02:00
parent 60b86de2ca
commit 68b5a71add
1 changed files with 11 additions and 4 deletions
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13
common/block-snapshot
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@ -7,6 +7,8 @@
dir=$(dirname "$0") dir=$(dirname "$0")
. "$dir/block-common.sh" . "$dir/block-common.sh"
HOTPLUG_STORE="/var/run/xen-hotplug/${XENBUS_PATH//\//-}"
get_dev() { get_dev() {
dev=$1 dev=$1
@ -89,7 +91,6 @@ create_dm_snapshot_origin() {
t=$(xenstore_read_default "$XENBUS_PATH/type" 'MISSING') t=$(xenstore_read_default "$XENBUS_PATH/type" 'MISSING')
case "$command" in case "$command" in
add) add)
case $t in case $t in
@ -117,14 +118,20 @@ case "$command" in
if [ "$t" == "snapshot" ]; then if [ "$t" == "snapshot" ]; then
#that's all for snapshot, store name of prepared device #that's all for snapshot, store name of prepared device
xenstore_write "$XENBUS_PATH/node" "/dev/mapper/$dm_devname" xenstore_write "$XENBUS_PATH/node" "/dev/mapper/$dm_devname"
echo "/dev/mapper/$dm_devname" > "$HOTPLUG_STORE-node"
write_dev /dev/mapper/$dm_devname write_dev /dev/mapper/$dm_devname
elif [ "$t" == "origin" ]; then elif [ "$t" == "origin" ]; then
# for origin - prepare snapshot-origin device and store its name # for origin - prepare snapshot-origin device and store its name
dm_devname=origin-$(stat -c '%D:%i' "$base") dm_devname=origin-$(stat -c '%D:%i' "$base")
create_dm_snapshot_origin $dm_devname "$base" create_dm_snapshot_origin $dm_devname "$base"
xenstore_write "$XENBUS_PATH/node" "/dev/mapper/$dm_devname" xenstore_write "$XENBUS_PATH/node" "/dev/mapper/$dm_devname"
echo "/dev/mapper/$dm_devname" > "$HOTPLUG_STORE-node"
write_dev /dev/mapper/$dm_devname write_dev /dev/mapper/$dm_devname
fi fi
# Save domain name for template commit on device remove
domid=$(xenstore_read "$XENBUS_PATH/frontend-id")
domain=$(xl domname $domid)
echo $domain > "$HOTPLUG_STORE-domain"
release_lock "block" release_lock "block"
exit 0 exit 0
@ -134,7 +141,7 @@ case "$command" in
remove) remove)
case $t in case $t in
snapshot|origin) snapshot|origin)
node=$(xenstore_read "$XENBUS_PATH/node") node=$(cat "$HOTPLUG_STORE-node")
if [ -z "$node" ]; then if [ -z "$node" ]; then
fatal "No device node to remove" fatal "No device node to remove"
@ -175,7 +182,7 @@ case "$command" in
fi fi
done done
# Commit template changes # Commit template changes
domain=$(xenstore_read "$XENBUS_PATH/domain") domain=$(cat "$HOTPLUG_STORE-domain")
if [ "$domain" ]; then if [ "$domain" ]; then
# Dont stop on errors # Dont stop on errors
/usr/bin/qvm-template-commit "$domain" || true /usr/bin/qvm-template-commit "$domain" || true