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[1/4] Btrfs: device path change must be logged

Message ID 1433139379-640-1-git-send-email-anand.jain@oracle.com (mailing list archive)
State New, archived
Headers show

Commit Message

Anand Jain June 1, 2015, 6:16 a.m. UTC 
From the issue diagnosable point of view, log if the device path is
changed.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 fs/btrfs/volumes.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 4ffcdf9..a51d492 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -606,6 +606,10 @@  static noinline int device_list_add(const char *path,
 			return -EEXIST;
 		}
 
+		printk_in_rcu(KERN_INFO \
+			"BTRFS: device fsid %pU devid %llu old path %s new path %s\n",
+			disk_super->fsid, devid, rcu_str_deref(device->name), path);
+
 		name = rcu_string_strdup(path, GFP_NOFS);
 		if (!name)
 			return -ENOMEM;