dm: make sure to obey max_io_len_target_boundary
Commit 61697a6a ("dm: eliminate 'split_discard_bios' flag from DM target interface") incorrectly removed code from __send_changing_extent_only() that is required to impose a per-target IO boundary on IO that exceeds max_io_len_target_boundary(). Otherwise "special" IO (e.g. DISCARD, WRITE SAME, WRITE ZEROES) can write beyond where allowed. Fix this by restoring the max_io_len_target_boundary() limit in __send_changing_extent_only() Fixes: 61697a6a ("dm: eliminate 'split_discard_bios' flag from DM target interface") Cc: stable@vger.kernel.org # 5.1+ Signed-off-by:Michael Lass <bevan@bi-co.net> Signed-off-by:
Mike Snitzer <snitzer@redhat.com>
parent
8454fca4
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