dm cache: only allow a single io_mode cache feature to be requested

Browse source

More than one io_mode feature can be requested when creating a dm cache
device (as is: last one wins).  The io_mode selections are incompatible
with one another, we should force them to be selected exclusively.  Add
a counter to check for more than one io_mode selection.

Fixes: 629d0a8a1a ("dm cache metadata: add "metadata2" feature")
Signed-off-by: John Pittman <jpittman@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

...

This commit is contained in:

John Pittman 2018-06-21 17:35:33 -04:00 • committed by Mike Snitzer

parent 6c7413c0f5

commit af9313c32c

1 changed files with 15 additions and 4 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

19

drivers/md/dm-cache-target.c

View file