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Description of problem:

When VDO is in read-only mode, an attempt to suspend and resume the VDO will fail to resume, leaving data inaccessible.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Start a VDO named vdo0
2. Cause it to go read-only (for instance, by having set it up atop a dm-flakey with the error_writes flag)
3. sudo dmsetup suspend vdo0
4. sudo dmsetup resume vdo0

Actual results:

device-mapper: resume ioctl on vdo0  failed: Input/output error
and in kernel log:

[  863.423024] kvdo0:dmsetup: resuming device '253:3'
[  863.428910] kvdo0:dmsetup: resume of device '253:3' failed with error: 1485
[  863.436369] device-mapper: table: 253:3: vdo: preresume failed, error = -5

Expected results:

(no output, resume succeeds)

Additional info:

Verified with kmod-kvdo-6.2.6.3-82.el8.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (kmod-kvdo bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:2003