libvirt_recover_xattrs: Add unsafe operation mode

In some cases you want to fix a certain directory while you don't really
care whether there are other VMs running. Add a option to disable the
check.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>

tools/libvirt_recover_xattrs.sh

@@ -7,7 +7,7 @@ function die {
 
 function show_help {
     cat << EOF
-Usage: ${0##*/} -[hqn] [PATH]
+Usage: ${0##*/} -[hqnu] [PATH]
 
 Clear out any XATTRs set by libvirt on all files that have them.
 The idea is to reset refcounting, should it break.
@@ -15,6 +15,7 @@ The idea is to reset refcounting, should it break.
   -h    display this help and exit
   -q    quiet (don't print which files are being fixed)
   -n    dry run; don't remove any XATTR just report the file name
+  -u    unsafe; don't check whether there are running VMs; PATH must be specified
 
 PATH can be specified to refine search to only to given path
 instead of whole root ('/'), which is the default.
@@ -23,6 +24,7 @@ EOF
 
 QUIET=0
 DRY_RUN=0
+UNSAFE=0
 DIR="/"
 
 # So far only qemu and lxc drivers use security driver.
@@ -33,7 +35,7 @@ if [ $(whoami) != "root" ]; then
     die "Must be run as root"
 fi
 
-while getopts hqn opt; do
+while getopts hqnu opt; do
     case $opt in
         h)
             show_help
@@ -45,6 +47,9 @@ while getopts hqn opt; do
         n)
             DRY_RUN=1
             ;;
+        u)
+            UNSAFE=1
+            ;;
         *)
             show_help >&2
             exit 1
@@ -55,6 +60,10 @@ done
 shift $((OPTIND - 1))
 if [ $# -gt 0 ]; then
     DIR=$1
+else
+    if [ ${UNSAFE} -eq 1 ]; then
+        die "Unsafe mode (-u) requires explicit 'PATH' argument"
+    fi
 fi
 
 case $(uname -s) in
@@ -72,7 +81,7 @@ case $(uname -s) in
 esac
 
 
-if [ ${DRY_RUN} -eq 0 ]; then
+if [ ${DRY_RUN} -eq 0 ] && [ ${UNSAFE} -eq 0 ]; then
     for u in ${URI[*]} ; do
         if [ -n "`virsh -q -c $u list 2>/dev/null`" ]; then
             die "There are still some domains running for $u"