Spare devices can be scanned but shouldn't be mountable.
Signed-off-by: Anand Jain <anand.jain@xxxxxxxxxx>
---
fs/btrfs/disk-io.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 38e0385..3662c0a 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2768,6 +2768,14 @@ int open_ctree(struct super_block *sb,
goto fail_alloc;
}
+ if (btrfs_super_incompat_flags(disk_super) &
+ BTRFS_FEATURE_INCOMPAT_SPARE_DEV) {
+ /*You can only scan a spare device but not mount*/
+ printk(KERN_ERR "BTRFS: You can't mount a spare device\n");
+ err = -ENOTSUPP;
+ goto fail_alloc;
+ }
+
/*
* Leafsize and nodesize were always equal, this is only a sanity check.
*/
--
2.4.1
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