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Roger Pau Monne
b24dc64ef3
Since most of the needed work is already done in previous patches,
this patch only contains the necessary code to call hotplug scripts
for disk devices, that should be called when the device is added or
removed from a guest.
We will chain the launch of the disk hotplug scripts after the
device_backend_callback callback, or directly from
libxl__initiate_device_{add,remove} if the device is already in the
desired state.
Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
120 lines
2.8 KiB
Bash
120 lines
2.8 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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# Hack to prevent the execution of hotplug scripts from udev if the domain
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# has been launched from libxl
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if [ -n "${UDEV_CALL}" ] && \
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xenstore-read "libxl/disable_udev" >/dev/null 2>&1; then
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exit 0
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fi
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dir=$(dirname "$0")
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. "$dir/hotplugpath.sh"
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. "$dir/logging.sh"
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. "$dir/xen-script-common.sh"
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. "$dir/locking.sh"
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exec 2>>/var/log/xen/xen-hotplug.log
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export PATH="${BINDIR}:${SBINDIR}:${LIBEXEC}:${PRIVATE_BINDIR}:/sbin:/bin:/usr/bin:/usr/sbin:$PATH"
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export LANG="POSIX"
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unset $(set | grep ^LC_ | cut -d= -f1)
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fatal() {
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_xenstore_write "$XENBUS_PATH/hotplug-error" "$*" \
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"$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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do_or_die() {
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"$@" || fatal "$@ failed"
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}
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do_without_error() {
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"$@" 2>/dev/null || log debug "$@ failed"
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}
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sigerr() {
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fatal "$0 failed; error detected."
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}
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trap sigerr ERR
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##
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# xenstore_read <path>+
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#
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# Read each of the given paths, returning each result on a separate line, or
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# exit this script if any of the paths is missing.
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#
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xenstore_read() {
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local v=$(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" 2>/dev/null || 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.
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#
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_xenstore_write() {
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log debug "Writing $@ to xenstore."
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xenstore-write "$@"
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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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_xenstore_write "$@" || fatal "Writing $@ to xenstore failed."
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}
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##
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# call_hooks <devtype> <hook>
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#
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# Execute each hook in the <hook> directory.
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#
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call_hooks() {
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for f in /etc/xen/scripts/${1}-${2}.d/*.hook; do
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if [ -x "$f" ]; then . "$f"; fi
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done
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}
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log debug "$@" "XENBUS_PATH=$XENBUS_PATH"
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