From: Liu Bo <liubo2009@cn.fujitsu.com>
Date: Thu, 14 Jun 2012 08:23:19 +0000 (-0600)
Subject: Btrfs: do not resize a seeding device
X-Git-Tag: firefly_0821_release~3680^2~2518^2~26
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=4e42ae1bdcda77fc958a17d7ff4ba5a9c9c207da;p=firefly-linux-kernel-4.4.55.git

Btrfs: do not resize a seeding device

Seeding devices are not supposed to change any more.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
---

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a98f7d252829..58adbd0356d6 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1306,6 +1306,13 @@ static noinline int btrfs_ioctl_resize(struct btrfs_root *root,
 		ret = -EINVAL;
 		goto out_free;
 	}
+	if (device->fs_devices && device->fs_devices->seeding) {
+		printk(KERN_INFO "btrfs: resizer unable to apply on "
+		       "seeding device %llu\n", devid);
+		ret = -EINVAL;
+		goto out_free;
+	}
+
 	if (!strcmp(sizestr, "max"))
 		new_size = device->bdev->bd_inode->i_size;
 	else {