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btrfs: use dev_t to match device in device_matched
Commit "btrfs: add device major-minor info in the struct btrfs_device" saved the device major-minor number in the struct btrfs_device upon discovering it. So no need to lookup_bdev() again just match, which means device_matched() can go away. Signed-off-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -534,45 +534,6 @@ error:
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return ret;
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}
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/*
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* Check if the device in the path matches the device in the given struct device.
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*
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* Returns:
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* true If it is the same device.
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* false If it is not the same device or on error.
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*/
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static bool device_matched(const struct btrfs_device *device, dev_t dev_new)
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{
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char *device_name;
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dev_t dev_old;
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int ret;
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/*
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* If we are looking for a device with the matching dev_t, then skip
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* device without a name (a missing device).
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*/
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if (!device->name)
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return false;
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device_name = kzalloc(BTRFS_PATH_NAME_MAX, GFP_KERNEL);
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if (!device_name)
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return false;
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rcu_read_lock();
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scnprintf(device_name, BTRFS_PATH_NAME_MAX, "%s", rcu_str_deref(device->name));
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rcu_read_unlock();
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ret = lookup_bdev(device_name, &dev_old);
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kfree(device_name);
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if (ret)
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return false;
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if (dev_old == dev_new)
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return true;
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return false;
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}
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/**
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* Search and remove all stale devices (which are not mounted).
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* When both inputs are NULL, it will search and release all stale devices.
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@ -604,7 +565,7 @@ static int btrfs_free_stale_devices(dev_t devt, struct btrfs_device *skip_device
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&fs_devices->devices, dev_list) {
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if (skip_device && skip_device == device)
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continue;
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if (devt && !device_matched(device, devt))
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if (devt && devt != device->devt)
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continue;
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if (fs_devices->opened) {
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/* for an already deleted device return 0 */
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