Check that passed file descriptors are using O_DIRECT. Required to avoid data integrity problems caused by the page cache.
https://jira.sw.ru/browse/PSBM-142050 Signed-off-by: Alexander Atanasov <alexander.atana...@virtuozzo.com> --- drivers/md/dm-qcow2-target.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/md/dm-qcow2-target.c b/drivers/md/dm-qcow2-target.c index 9a6f970343ec..995679b3cd98 100644 --- a/drivers/md/dm-qcow2-target.c +++ b/drivers/md/dm-qcow2-target.c @@ -678,6 +678,9 @@ static int qcow2_attach_file(struct dm_target *ti, struct qcow2_target *tgt, if (!S_ISREG(file_inode(file)->i_mode)) return -EINVAL; + if (!(file->f_flags & O_DIRECT)) + return -EINVAL; + mode = tgt->top != qcow2 ? FMODE_READ : dm_table_get_mode(ti->table); mode &= (FMODE_READ|FMODE_WRITE); if (mode & ~(file->f_mode & (FMODE_READ|FMODE_WRITE))) -- 2.31.1 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
