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Commit 74b595fe authored by David Sterba's avatar David Sterba
Browse files

btrfs: factor reading progress out of btrfs_dev_replace_status 



We'll want to read the percentage value from dev_replace elsewhere, move
the logic to a separate helper.

Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 0a52d108

fs/btrfs/dev-replace.c

+30 −16
Original line number Diff line number Diff line
@@ -639,11 +639,39 @@ static void btrfs_dev_replace_update_device_in_mapping_tree( 
	write_unlock(&em_tree->lock);

}



/*

 * Read progress of device replace status according to the state and last

 * stored position. The value format is the same as for

 * btrfs_dev_replace::progress_1000

 */

static u64 btrfs_dev_replace_progress(struct btrfs_fs_info *fs_info)

{

	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;

	u64 ret = 0;



	switch (dev_replace->replace_state) {

	case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:

	case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:

		ret = 0;

		break;

	case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:

		ret = 1000;

		break;

	case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:

	case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:

		ret = div64_u64(dev_replace->cursor_left,

				div_u64(btrfs_device_get_total_bytes(

						dev_replace->srcdev), 1000));

		break;

	}



	return ret;

}



void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,

			      struct btrfs_ioctl_dev_replace_args *args)

{

	struct btrfs_dev_replace *dev_replace = &fs_info->dev_replace;

	struct btrfs_device *srcdev;



	btrfs_dev_replace_lock(dev_replace, 0);

	/* even if !dev_replace_is_valid, the values are good enough for
@@ -656,21 +684,7 @@ void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info, 
		atomic64_read(&dev_replace->num_write_errors);

	args->status.num_uncorrectable_read_errors =

		atomic64_read(&dev_replace->num_uncorrectable_read_errors);

	switch (dev_replace->replace_state) {

	case BTRFS_IOCTL_DEV_REPLACE_STATE_NEVER_STARTED:

	case BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED:

		args->status.progress_1000 = 0;

		break;

	case BTRFS_IOCTL_DEV_REPLACE_STATE_FINISHED:

		args->status.progress_1000 = 1000;

		break;

	case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:

	case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:

		srcdev = dev_replace->srcdev;

		args->status.progress_1000 = div64_u64(dev_replace->cursor_left,

			div_u64(btrfs_device_get_total_bytes(srcdev), 1000));

		break;

	}

	args->status.progress_1000 = btrfs_dev_replace_progress(fs_info);

	btrfs_dev_replace_unlock(dev_replace, 0);

}