There are the following problems with lvm completions:
1)_lvm_physicalvolumes() only gets PVs that belong to a VG. In some
  cases like pvremove we can use all PVs including those not included
  in any VGs.
  solution: Add _lvm_physicalvolumes_all to get all PVs and correct
            all the commands.

2)pvcreate should be able to use all block devcices.
  solution: Add _lvm_filedir() to use _filedir except set $cur to /dev
            when $cur is empty.

3)when /etc/lvm/lvm.conf silent is 1 there is no output for vg/lv/pvscan,
  bash-completion will not work.
  solution: Check the value of silent option. If it is 1 then temporarily
            set silent 0 and recover back to 1 after the command executed.

Signed-off-by: Liuhua Wang <lwang@suse.com>
Reviewed-by: Lidong Zhong <lzhong@suse.com>






Index: bash-completion-2.11/completions/lvm
===================================================================
--- bash-completion-2.11.orig/completions/lvm
+++ bash-completion-2.11/completions/lvm
@@ -6,27 +6,41 @@ _lvm_filedir()
     _filedir
 }
 
+_lvm_verbose()
+{
+    local silent=$(sed -n -e "s|^[ \t]*silent[ \t]*=[ \t]*\([01]\)|\1|p" /etc/lvm/lvm.conf)
+    test ${silent:-0} -eq 1
+}
+
 _lvm_volumegroups()
 {
-    COMPREPLY=($(compgen -W "$(vgscan 2>/dev/null |
+    local verbose
+    _lvm_verbose && verbose=-v
+    COMPREPLY=( $(compgen -W "$( vgscan $verbose 2>/dev/null | \
         command sed -n -e 's|.*Found.*"\(.*\)".*$|\1|p')" -- "$cur"))
 }
 
 _lvm_physicalvolumes_all()
 {
-    COMPREPLY=($(compgen -W "$(pvscan 2>/dev/null |
+    local verbose
+    _lvm_verbose && verbose=-v
+    COMPREPLY=( $(compgen -W "$( pvscan $verbose 2>/dev/null | \
         command sed -n -e 's|^.*PV \([^ ]*\) .*|\1|p')" -- "$cur"))
 }
 
 _lvm_physicalvolumes()
 {
-    COMPREPLY=($(compgen -W "$(pvscan 2>/dev/null |
+    local verbose
+    _lvm_verbose && verbose=-v
+    COMPREPLY=( $(compgen -W "$( pvscan $verbose 2>/dev/null | \
         command sed -n -e 's|^.*PV \(.*\) VG.*$|\1|p')" -- "$cur"))
 }
 
 _lvm_logicalvolumes()
 {
-    COMPREPLY=($(compgen -W "$(lvscan 2>/dev/null |
+    local verbose
+    _lvm_verbose && verbose=-v
+    COMPREPLY=( $(compgen -W "$( lvscan $verbose 2>/dev/null | \
         command sed -n -e "s|^.*'\(.*\)'.*$|\1|p")" -- "$cur"))
     if [[ $cur == /dev/mapper/* ]]; then
         _filedir
@@ -387,7 +401,7 @@ _vgreduce()
         if ((args == 0)); then
             _lvm_volumegroups
         else
-            _lvm_physicalvolumes
+            _lvm_physicalvolumes_all
         fi
     fi
 } &&
@@ -701,7 +715,7 @@ _lvcreate()
         if ((args == 0)); then
             _lvm_volumegroups
         else
-            _lvm_physicalvolumes
+            _lvm_physicalvolumes_all
         fi
     fi
 } &&