btrfs: add helper for device path or missing

This patch creates a helper function to get either the rcu device path
or missing.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
[ rename to btrfs_dev_name, switch to if/else ]
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 14 insertions, 11 deletions

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 7c655f9a7a50..483eb62b9b27 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -304,6 +304,14 @@ void btrfs_after_dev_replace_commit(struct btrfs_fs_info *fs_info)
                 dev_replace->cursor_left_last_write_of_item;
 }
 
+static char* btrfs_dev_name(struct btrfs_device *device)
+{
+        if (device->missing)
+                return "<missing disk>";
+        else
+                return rcu_str_deref(device->name);
+}
+
 int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info,
                 const char *tgtdev_name, u64 srcdevid, const char *srcdev_name,
                 int read_src)
@@ -363,8 +371,7 @@ int btrfs_dev_replace_start(struct btrfs_fs_info *fs_info,
 
         btrfs_info_in_rcu(fs_info,
                       "dev_replace from %s (devid %llu) to %s started",
-                      src_device->missing ? "<missing disk>" :
-                        rcu_str_deref(src_device->name),
+                      btrfs_dev_name(src_device),
                       src_device->devid,
                       rcu_str_deref(tgt_device->name));
 
@@ -538,8 +545,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
         } else {
                 btrfs_err_in_rcu(fs_info,
                                  "btrfs_scrub_dev(%s, %llu, %s) failed %d",
-                                 src_device->missing ? "<missing disk>" :
-                                 rcu_str_deref(src_device->name),
+                                 btrfs_dev_name(src_device),
                                  src_device->devid,
                                  rcu_str_deref(tgt_device->name), scrub_ret);
                 btrfs_dev_replace_unlock(dev_replace, 1);
@@ -557,8 +563,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
 
         btrfs_info_in_rcu(fs_info,
                           "dev_replace from %s (devid %llu) to %s finished",
-                          src_device->missing ? "<missing disk>" :
-                          rcu_str_deref(src_device->name),
+                          btrfs_dev_name(src_device),
                           src_device->devid,
                           rcu_str_deref(tgt_device->name));
         tgt_device->is_tgtdev_for_dev_replace = 0;
@@ -814,12 +819,10 @@ static int btrfs_dev_replace_kthread(void *data)
         progress = btrfs_dev_replace_progress(fs_info);
         progress = div_u64(progress, 10);
         btrfs_info_in_rcu(fs_info,
-                "continuing dev_replace from %s (devid %llu) to %s @%u%%",
-                dev_replace->srcdev->missing ? "<missing disk>"
-                        : rcu_str_deref(dev_replace->srcdev->name),
+                "continuing dev_replace from %s (devid %llu) to target %s @%u%%",
+                btrfs_dev_name(dev_replace->srcdev),
                 dev_replace->srcdev->devid,
-                dev_replace->tgtdev ? rcu_str_deref(dev_replace->tgtdev->name)
-                        : "<missing target disk>",
+                btrfs_dev_name(dev_replace->tgtdev),
                 (unsigned int)progress);
 
         btrfs_dev_replace_continue_on_mount(fs_info);