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authorOmar Sandoval <osandov@fb.com>2017-08-24 10:03:43 +0300
committerJens Axboe <axboe@kernel.dk>2017-08-31 22:51:14 +0300
commit89e4fdecb51cf5535867026274bc97de9480ade5 (patch)
treee0cbe2e118ea5ac8ff05a3bb8323d4142545335c /include/uapi/linux/loop.h
parent6c6b6f28b3335fd85ec833ee0005d9c9dca6c003 (diff)
downloadlinux-89e4fdecb51cf5535867026274bc97de9480ade5.tar.xz
loop: add ioctl for changing logical block size
This is a different approach from the first attempt in f2c6df7dbf9a ("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>
Diffstat (limited to 'include/uapi/linux/loop.h')
-rw-r--r--include/uapi/linux/loop.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/loop.h b/include/uapi/linux/loop.h
index c8125ec1f4f2..23158dbe2424 100644
--- a/include/uapi/linux/loop.h
+++ b/include/uapi/linux/loop.h
@@ -88,6 +88,7 @@ struct loop_info64 {
#define LOOP_CHANGE_FD 0x4C06
#define LOOP_SET_CAPACITY 0x4C07
#define LOOP_SET_DIRECT_IO 0x4C08
+#define LOOP_SET_BLOCK_SIZE 0x4C09
/* /dev/loop-control interface */
#define LOOP_CTL_ADD 0x4C80