Bug 958702

commit 59750ed6ea12c4db5ba042fef1a39b963cbfb559
Author: Osier Yang <jyang>
Date:   Tue May 7 18:29:29 2013 +0800

    storage: Skip inactive lv volumes
    
    If the volume is of a clustered volume group, and not active, the
    related pool APIs fails on opening /dev/vg/lv. If the volume is
    suspended, it hangs on open(2) the volume.
    
    Though the best solution is to expose the volume status in volume
    XML, and even better to provide API to activate/deactivate the volume,
    but it's not the work I want to touch currently. Volume status in
    other status is just fine to skip.
    
    About the 5th field of lv_attr (from man lvs[8])
    <quote>
     5 State: (a)ctive, (s)uspended, (I)nvalid snapshot, invalid
       (S)uspended snapshot, snapshot (m)erge failed,suspended
       snapshot (M)erge failed, mapped (d)evice present without
       tables,  mapped device present with (i)nactive table
    </quote>

Created attachment 745255 [details]
libvirt-storage-fix-clutered-lvm

my current patch for rhel6 implements this behavior

I can reproduce this with libvirt-1.0.4-1.1.el7.x86_64
verify with libvirt-1.0.6-1.el7

step:
pool-refresh:
1) create  a pv 

#pvcreate ...

2) create a vg  

#vgcreate ... 

3)  add a vg pool in the libvirt 
<pool type='logical'>
  <name>vg</name>
  <uuid>9af81e46-41e2-3a2a-bb6e-07c9c0ceab73</uuid>
  <capacity unit='bytes'>32208060416</capacity>
  <allocation unit='bytes'>419430400</allocation>
  <available unit='bytes'>31788630016</available>
  <source>
    <device path='/dev/sda6'/>
    <name>vg_virt</name>
    <format type='lvm2'/>
  </source>
  <target>
    <path>/dev/vg_virt</path>
    <permissions>
      <mode>0700</mode>
      <owner>-1</owner>
      <group>-1</group>
    </permissions>
  </target>
</pool>
4) create 2 lv in the pool   lv1 , lv2

5) disable lv1   

#lvchange -an /dev/vg_virt/lv1

6)check lv1 

#lvdisplay 
  --- Logical volume ---
  LV Path                /dev/vg_virt/lv1
  LV Name                lv1
  VG Name                vg_virt
  LV UUID                EsrAXn-dd0u-D8wc-YMB3-sTTE-kPXN-oMdILf
  LV Write Access        read/write
  LV Creation host, time intel-5310-32-2.englab.nay.redhat.com, 2013-06-06 14:29:03 +0800
  LV Status              NOT available
  LV Size                200.00 MiB
  Current LE             50
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto

7) refresh pool
#virsh pool-refresh vg
Pool vg refreshed

# virsh vol-list vg
Name                 Path                                    
-----------------------------------------
lv2                  /dev/vg_virt/lv2  

pool-create

1)create two lv(lv1,lv2)
2)disable lv1
3)#virsh pool-create pool.xml
Pool vg created from pool.xml

verification passed.

This request was resolved in Red Hat Enterprise Linux 7.0.

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