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https://github.com/xen-project/xen.git
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emellor@leeni.uk.xensource.com
cb3d870a1a
The problem is: There is no mechanism to detect block device setup failure Network devices have the same problem, and are fixed with this too. I handling this problem in the way suggested by aliguori: - hotplug scripts write a "hotplug-status" node on store - Xend DevController.createDevice() check verify this node and return success or throw an exception on failure. - If no changes in "hotplug-status" node after DEVICE_CREATE_TIMEOUT seconds Xend throw an exception showing the problem with hotplug scripts. Signed-off-by: Ewan Mellor <ewan@xensource.com>
79 lines
1.9 KiB
Bash
79 lines
1.9 KiB
Bash
#
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# Copyright (c) 2005 XenSource Ltd.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of version 2.1 of the GNU Lesser General Public
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# License as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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dir=$(dirname "$0")
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. "$dir/xen-script-common.sh"
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export PATH="/sbin:/bin:/usr/bin:/usr/sbin:$PATH"
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export LANG="POSIX"
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unset $(set | grep ^LC_ | cut -d= -f1)
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log() {
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local level="$1"
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shift
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logger -p "daemon.$level" -- "$0:" "$@" || echo "$0 $@" >&2
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}
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fatal() {
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xenstore_write "$XENBUS_PATH"/hotplug-status error
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log err "$@"
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exit 1
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}
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success() {
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# Tell DevController that backend is "connected"
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xenstore_write "$XENBUS_PATH"/hotplug-status connected
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}
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##
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# xenstore_read <path>+
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#
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# Read each of the given paths, returning each result on a separate line, or
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# exit this script if any of the paths is missing.
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#
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xenstore_read() {
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local v=$(xenstore-read "$@" || true)
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[ "$v" != "" ] || fatal "xenstore-read $@ failed."
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echo "$v"
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}
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##
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# xenstore_read_default <path> <default>
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#
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# Read the given path, returning the value there or the given default if the
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# path is not present.
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#
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xenstore_read_default() {
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xenstore-read "$1" || echo "$2"
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}
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##
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# xenstore_write (<path> <value>)+
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#
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# Write each of the key/value pairs to the store, and exit this script if any
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# such writing fails.
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#
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xenstore_write() {
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log debug "Writing $@ to xenstore."
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xenstore-write "$@" || fatal "Writing $@ to xenstore failed."
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}
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log debug "$@" "XENBUS_PATH=$XENBUS_PATH"
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