hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8S3GW CVE: NA --------------------------- Filesystem on logic devices may be corrupted when writing to a block device which is used to create logic devices, so show info to indicate this risk behavior. Signed-off-by: Li Lingfeng <lilingfeng3@huawei.com> --- block/bdev.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/block/bdev.c b/block/bdev.c index afa060807d4e..21cbfa166ebe 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -818,12 +818,21 @@ static void bdev_unblock_mount(struct block_device *bdev) bdev->bd_disk->part_writers--; } +static bool bdev_lower_device_writes_blocked(struct block_device *bdev) +{ + if (bdev_opt(DETECT_WRITING_PART0)) + return !!bdev->bd_holder; + else + return !!bdev->bd_holder && bdev->bd_holder != bd_may_claim; +} + static bool bdev_may_open(struct block_device *bdev, blk_mode_t mode) { if (bdev_opt(ALLOW_WRITE_MOUNTED) && !bdev_opt(WRITE_MOUNTED_DUMP)) return true; /* Writes blocked? */ - if (mode & BLK_OPEN_WRITE && bdev_writes_blocked(bdev)) + if (mode & BLK_OPEN_WRITE && (bdev_writes_blocked(bdev) || + bdev_lower_device_writes_blocked(bdev))) blkdev_dump_conflict_opener(bdev, OPEN_EXCLUSIVE); else if (mode & BLK_OPEN_RESTRICT_WRITES && bdev_mount_blocked(bdev)) blkdev_dump_conflict_opener(bdev, OPEN_FOR_EXCLUSIVE); -- 2.31.1