loop: add ioctl for changing logical block size

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This is a different approach from the first attempt in f2c6df7dbf
("loop: support 4k physical blocksize"). Rather than extending
LOOP_{GET,SET}_STATUS, add a separate ioctl just for setting the block
size.

Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Omar Sandoval 2017-08-24 00:03:43 -07:00 • committed by Jens Axboe

parent 6c6b6f28b3

commit 89e4fdecb5

2 changed files with 25 additions and 0 deletions

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include/uapi/linux/loop.h

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