@@ -607,8 +607,17 @@ static void pending_bios_fn(struct btrfs_work *work)
run_scheduled_bios(device);
}
-
-static void btrfs_free_stale_device(struct btrfs_device *cur_dev, char *path)
+/*
+ * btrfs_free_stale_device()
+ * Search and remove all stale (devices which are not mounted) devices.
+ * When both inputs are NULL, it will search and release all stale devices.
+ * path: Optional. When provided will it release all unmounted devices
+ * matching this path only.
+ * skip_dev: Optional. Will skip this device when searching for the stale
+ * devices.
+ */
+static void btrfs_free_stale_device(const char *path,
+ struct btrfs_device *skip_dev)
{
struct btrfs_fs_devices *fs_devs, *tmp_fs_devs;
struct btrfs_device *dev, *tmp_dev;
@@ -622,20 +631,13 @@ static void btrfs_free_stale_device(struct btrfs_device *cur_dev, char *path)
&fs_devs->devices, dev_list) {
int not_found;
- if (cur_dev && (cur_dev == dev || !dev->name))
+ if (skip_dev && skip_dev == dev)
+ continue;
+ if (path && !dev->name)
continue;
- /*
- * Todo: This won't be enough. What if the same device
- * comes back (with new uuid and) with its mapper path?
- * But for now, this does help as mostly an admin will
- * either use mapper or non mapper path throughout.
- */
rcu_read_lock();
- if (cur_dev)
- not_found = strcmp(rcu_str_deref(dev->name),
- rcu_str_deref(cur_dev->name));
- else if (path)
+ if (path)
not_found = strcmp(rcu_str_deref(dev->name), path);
else
not_found = 0;
@@ -784,7 +786,7 @@ static noinline int device_list_add(const char *path,
ret = 1;
device->fs_devices = fs_devices;
- btrfs_free_stale_device(device, NULL);
+ btrfs_free_stale_device(path, device);
} else if (!device->name || strcmp(device->name->str, path)) {
/*
* When FS is already mounted.
Now as the there is path in arg, so instead of reading the path from cur_device just get it from the caller, and so the purpose of cur_device is to skip the device, so rename it to skip_dev. Also drop the comment about different path being used for the same device, since now we will have cli to clean any device that's not a concern any more. Signed-off-by: Anand Jain <anand.jain@oracle.com> --- v3: add btrfs_free_stale_device() fn description, as suggested by Nikolay Fix line with longer than 80 char v2: btrfs_device::name is null when we have missing device and unmounted. So we still need to check for dev->name. fs/btrfs/volumes.c | 30 ++++++++++++++++-------------- 1 file changed, 16 insertions(+), 14 deletions(-)