Martijn Coenen faf1d25440
loop: Clean up LOOP_SET_STATUS lo_flags handling ...
LOOP_SET_STATUS(64) will actually allow some lo_flags to be modified; in
particular, LO_FLAGS_AUTOCLEAR can be set and cleared, whereas
LO_FLAGS_PARTSCAN can be set to request a partition scan. Make this
explicit by updating the UAPI to include the flags that can be
set/cleared using this ioctl.
The implementation can then blindly take over the passed in flags,
and use the previous flags for those flags that can't be set / cleared
using LOOP_SET_STATUS.
Signed-off-by: Martijn Coenen <maco@android.com >
Reviewed-by: Christoph Hellwig <hch@lst.de >
Signed-off-by: Jens Axboe <axboe@kernel.dk >
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