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authorIlya Dryomov <idryomov@gmail.com>2018-01-11 14:09:11 +0100
committerJens Axboe <axboe@kernel.dk>2018-01-18 12:57:17 -0700
commit721c7fc701c71f693307d274d2b346a1ecd4a534 (patch)
tree02b8934cb55c6b00a533c536419e2d157d18917b /block/blk-lib.c
parent17534c6f2c065ad8e34ff6f013e5afaa90428512 (diff)
block: fail op_is_write() requests to read-only partitions
Regular block device writes go through blkdev_write_iter(), which does bdev_read_only(), while zeroout/discard/etc requests are never checked, both userspace- and kernel-triggered. Add a generic catch-all check to generic_make_request_checks() to actually enforce ioctl(BLKROSET) and set_disk_ro(), which is used by quite a few drivers for things like snapshots, read-only backing files/images, etc. Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-lib.c')
0 files changed, 0 insertions, 0 deletions