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UPSTREAM: loop: Add LOOP_SET_BLOCK_SIZE in compat ioctl

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This change adds LOOP_SET_BLOCK_SIZE as one of the supported ioctls
in lo_compat_ioctl. It only takes an unsigned long argument, and
in practice a 32-bit value works fine.

Bug: 117823094
Change-Id: I0061a082eb2632c47b7d66f35f2c909d33ff1653
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Evan Green <evgreen@chromium.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit 9fea4b395260175de4016b42982f45a3e6e03d0b)
Signed-off-by: Martijn Coenen <maco@android.com>
This commit is contained in:
Evan Green 2018-07-02 16:03:46 -07:00 • committed by Martijn Coenen
parent 8567ea359c
commit c82807c7dd
1 changed files with 1 additions and 0 deletions
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drivers/block/loop.c
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@ -1581,6 +1581,7 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
arg = (unsigned long) compat_ptr(arg);
case LOOP_SET_FD:
case LOOP_CHANGE_FD:
case LOOP_SET_BLOCK_SIZE:
err = lo_ioctl(bdev, mode, cmd, arg);
break;
default: