diff options
| author | NeilBrown <neilb@suse.com> | 2017-04-06 11:16:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-25 15:44:33 +0200 |
| commit | 7e789787878321fc2b1b7869963fa5eeede7402e (patch) | |
| tree | 9d5083a4428a7588fe0ffcbf5b43982ead510994 | |
| parent | fa9a4a9c6d6ffb21c220418384ed9d89f8c18e35 (diff) | |
md: MD_CLOSING needs to be cleared after called md_set_readonly or do_md_stop
commit 065e519e71b2c1f41936cce75b46b5ab34adb588 upstream.
if called md_set_readonly and set MD_CLOSING bit, the mddev cannot
be opened any more due to the MD_CLOING bit wasn't cleared. Thus it
needs to be cleared in md_ioctl after any call to md_set_readonly()
or do_md_stop().
Signed-off-by: NeilBrown <neilb@suse.com>
Fixes: af8d8e6f0315 ("md: changes for MD_STILL_CLOSED flag")
Signed-off-by: Zhilong Liu <zlliu@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/md.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 24925f2aa235..eddd360624a1 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -6752,6 +6752,7 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode, void __user *argp = (void __user *)arg; struct mddev *mddev = NULL; int ro; + bool did_set_md_closing = false; if (!md_ioctl_valid(cmd)) return -ENOTTY; @@ -6841,7 +6842,9 @@ static int md_ioctl(struct block_device *bdev, fmode_t mode, err = -EBUSY; goto out; } + WARN_ON_ONCE(test_bit(MD_CLOSING, &mddev->flags)); set_bit(MD_CLOSING, &mddev->flags); + did_set_md_closing = true; mutex_unlock(&mddev->open_mutex); sync_blockdev(bdev); } @@ -7041,6 +7044,8 @@ unlock: mddev->hold_active = 0; mddev_unlock(mddev); out: + if(did_set_md_closing) + clear_bit(MD_CLOSING, &mddev->flags); return err; } #ifdef CONFIG_COMPAT |