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Description of problem:
When removing vdo that is used by another device (for example LVM LV on top of VDO), vdo tried "dmsetup remove" few times and exits with "vdo: ERROR - cannot stop VDO service vdo_test" instead of providing more helpful message like LVM. Is it possible to check if VDO is in use and provide the message to used instead of trying to remove it right away and fail with general error?
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
--snip--
sdc 8:32 0 5.5T 0 disk
└─md127 9:127 0 10.9T 0 raid0
└─vdo_test 253:2 0 10.9T 0 vdo
└─vg_vdo_test-lv_test 253:3 0 10.9T 0 lvm
sdd 8:48 0 5.5T 0 disk
└─md127 9:127 0 10.9T 0 raid0
└─vdo_test 253:2 0 10.9T 0 vdo
└─vg_vdo_test-lv_test 253:3 0 10.9T 0 lvm
# vdo remove --all --verbose
Removing VDO vdo_test
Stopping VDO vdo_test
dmsetup status vdo_test
mount
udevadm settle
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup status vdo_test
vdo: ERROR - cannot stop VDO service vdo_test
Version-Release number of selected component (if applicable):
vdo-6.1.0.98-13
How reproducible:
100%
Steps to Reproduce:
1. create vdo
2. create device on top of vdo to block it
3. try to remove vdo
Actual results:
# vdo remove --all --verbose
Removing VDO vdo_test
Stopping VDO vdo_test
dmsetup status vdo_test
mount
udevadm settle
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup remove vdo_test
dmsetup status vdo_test
vdo: ERROR - cannot stop VDO service vdo_test
Expected results:
# vdo remove --all --verbose
vdo: ERROR - VDO is used by another device, cannot remove
Additional info:
This is what LVM does in this situation:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
--snip--
sdc 8:32 0 5.5T 0 disk
└─md127 9:127 0 10.9T 0 raid0
└─vdo_test 253:2 0 10.9T 0 vdo
└─vg_vdo_test-lv_test 253:3 0 10.9T 0 lvm
└─test-test 253:4 0 100G 0 lvm
sdd 8:48 0 5.5T 0 disk
└─md127 9:127 0 10.9T 0 raid0
└─vdo_test 253:2 0 10.9T 0 vdo
└─vg_vdo_test-lv_test 253:3 0 10.9T 0 lvm
└─test-test 253:4 0 100G 0 lvm
# vgremove vg_vdo_test
Do you really want to remove volume group "vg_vdo_test" containing 1 logical volumes? [y/n]: y
Logical volume vg_vdo_test/lv_test is used by another device.
# lvremove vg_vdo_test/lv_test
Logical volume vg_vdo_test/lv_test is used by another device.
Description of problem: When removing vdo that is used by another device (for example LVM LV on top of VDO), vdo tried "dmsetup remove" few times and exits with "vdo: ERROR - cannot stop VDO service vdo_test" instead of providing more helpful message like LVM. Is it possible to check if VDO is in use and provide the message to used instead of trying to remove it right away and fail with general error? # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT --snip-- sdc 8:32 0 5.5T 0 disk └─md127 9:127 0 10.9T 0 raid0 └─vdo_test 253:2 0 10.9T 0 vdo └─vg_vdo_test-lv_test 253:3 0 10.9T 0 lvm sdd 8:48 0 5.5T 0 disk └─md127 9:127 0 10.9T 0 raid0 └─vdo_test 253:2 0 10.9T 0 vdo └─vg_vdo_test-lv_test 253:3 0 10.9T 0 lvm # vdo remove --all --verbose Removing VDO vdo_test Stopping VDO vdo_test dmsetup status vdo_test mount udevadm settle dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup status vdo_test vdo: ERROR - cannot stop VDO service vdo_test Version-Release number of selected component (if applicable): vdo-6.1.0.98-13 How reproducible: 100% Steps to Reproduce: 1. create vdo 2. create device on top of vdo to block it 3. try to remove vdo Actual results: # vdo remove --all --verbose Removing VDO vdo_test Stopping VDO vdo_test dmsetup status vdo_test mount udevadm settle dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup remove vdo_test dmsetup status vdo_test vdo: ERROR - cannot stop VDO service vdo_test Expected results: # vdo remove --all --verbose vdo: ERROR - VDO is used by another device, cannot remove Additional info: This is what LVM does in this situation: # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT --snip-- sdc 8:32 0 5.5T 0 disk └─md127 9:127 0 10.9T 0 raid0 └─vdo_test 253:2 0 10.9T 0 vdo └─vg_vdo_test-lv_test 253:3 0 10.9T 0 lvm └─test-test 253:4 0 100G 0 lvm sdd 8:48 0 5.5T 0 disk └─md127 9:127 0 10.9T 0 raid0 └─vdo_test 253:2 0 10.9T 0 vdo └─vg_vdo_test-lv_test 253:3 0 10.9T 0 lvm └─test-test 253:4 0 100G 0 lvm # vgremove vg_vdo_test Do you really want to remove volume group "vg_vdo_test" containing 1 logical volumes? [y/n]: y Logical volume vg_vdo_test/lv_test is used by another device. # lvremove vg_vdo_test/lv_test Logical volume vg_vdo_test/lv_test is used by another device.