Mikulas Patocka
b6bcb84446
dm error: add discard support ...
Add io_err_io_hints() and set discard limits so that the zero target
advertises support for discards.
The error target will return -EIO for discards.
This is useful when the user combines dm-error with other
discard-supporting targets in the same table; without dm-error
support, discards would be disabled for the whole combined device.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Tested-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
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b6bcb84446