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| author | Ilya Dryomov <idryomov@gmail.com> | 2018-01-11 14:09:11 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-01-18 12:57:17 -0700 |
| commit | 721c7fc701c71f693307d274d2b346a1ecd4a534 (patch) | |
| tree | 02b8934cb55c6b00a533c536419e2d157d18917b /init | |
| parent | 17534c6f2c065ad8e34ff6f013e5afaa90428512 (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 'init')
0 files changed, 0 insertions, 0 deletions