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authorJosef Bacik <jbacik@fusionio.com>2012-08-02 10:22:20 -0400
committerChris Mason <chris.mason@oracle.com>2012-08-28 16:53:29 -0400
commitaa9ddcd4b5557102fa25695c11904f249b4dec49 (patch)
tree5ed695e48b6d32fd45e582496edc1b3da6f3b5f0 /fs/btrfs/super.c
parent3627bf4503b504077332c13496cb1bd54713bcbb (diff)
Btrfs: do not use missing devices when showing devname
If you do the following mkfs.btrfs /dev/sdb /dev/sdc rmmod btrfs dd if=/dev/zero of=/dev/sdb bs=1M count=1 mount -o degraded /dev/sdc /mnt/btrfs-test the box will panic trying to deref the name for the missing dev since it is the lower numbered devid. So fix show_devname to not use missing devices. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/super.c')
-rw-r--r--fs/btrfs/super.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 75ee2c7791f0..2e06f124f284 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1505,6 +1505,8 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root)
while (cur_devices) {
head = &cur_devices->devices;
list_for_each_entry(dev, head, dev_list) {
+ if (dev->missing)
+ continue;
if (!first_dev || dev->devid < first_dev->devid)
first_dev = dev;
}