[v2] btrfs: add device scanned-by process name in the scan message
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Message ID 20191003133611.2900-1-anand.jain@oracle.com
State New
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  • [v2] btrfs: add device scanned-by process name in the scan message
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Commit Message

Anand Jain Oct. 3, 2019, 1:36 p.m. UTC
Its very helpful if we had logged the device scanner process name
to debug the race condition between the systemd-udevd scan and the
user initiated device forget command.

This patch adds scanned-by process name to the scan message.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
v2: add pid as well

 fs/btrfs/volumes.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

Patch
diff mbox series

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 79e66db2c1a7..3fe0c422f75f 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1005,11 +1005,13 @@  static noinline struct btrfs_device *device_list_add(const char *path,
 		*new_device_added = true;
 
 		if (disk_super->label[0])
-			pr_info("BTRFS: device label %s devid %llu transid %llu %s\n",
-				disk_super->label, devid, found_transid, path);
+pr_info("BTRFS: device label %s devid %llu transid %llu %s scanned-by %s(%d)\n",
+				disk_super->label, devid, found_transid, path,
+				current->comm, task_pid_nr(current));
 		else
-			pr_info("BTRFS: device fsid %pU devid %llu transid %llu %s\n",
-				disk_super->fsid, devid, found_transid, path);
+pr_info("BTRFS: device fsid %pU devid %llu transid %llu %s scanned-by %s(%d)\n",
+				disk_super->fsid, devid, found_transid, path,
+				current->comm, task_pid_nr(current));
 
 	} else if (!device->name || strcmp(device->name->str, path)) {
 		/*