btrfs: create helper btrfs_find_device_by_user_input()

The patch renames btrfs_dev_replace_find_srcdev() to
btrfs_find_device_by_user_input() and moves it to volumes.c, so that
delete device can use it.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 26bcb48..7ad8ae9 100644 (file)
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -44,9 +44,6 @@ static void btrfs_dev_replace_update_device_in_mapping_tree(
                                                struct btrfs_fs_info *fs_info,
                                                struct btrfs_device *srcdev,
                                                struct btrfs_device *tgtdev);
-static int btrfs_dev_replace_find_srcdev(struct btrfs_root *root, u64 srcdevid,
-                                        char *srcdev_name,
-                                        struct btrfs_device **device);
 static u64 __btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info);
 static int btrfs_dev_replace_kthread(void *data);
 static int btrfs_dev_replace_continue_on_mount(struct btrfs_fs_info *fs_info);
@@ -329,7 +326,7 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
 
        /* the disk copy procedure reuses the scrub code */
        mutex_lock(&fs_info->volume_mutex);
-       ret = btrfs_dev_replace_find_srcdev(root, args->start.srcdevid,
+       ret = btrfs_find_device_by_user_input(root, args->start.srcdevid,
                                            args->start.srcdev_name,
                                            &src_device);
        if (ret) {
@@ -626,25 +623,6 @@ static void btrfs_dev_replace_update_device_in_mapping_tree(
        write_unlock(&em_tree->lock);
 }
 
-static int btrfs_dev_replace_find_srcdev(struct btrfs_root *root, u64 srcdevid,
-                                        char *srcdev_name,
-                                        struct btrfs_device **device)
-{
-       int ret;
-
-       if (srcdevid) {
-               ret = 0;
-               *device = btrfs_find_device(root->fs_info, srcdevid, NULL,
-                                           NULL);
-               if (!*device)
-                       ret = -ENOENT;
-       } else {
-               ret = btrfs_find_device_missing_or_by_path(root, srcdev_name,
-                                                          device);
-       }
-       return ret;
-}
-
 void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,
                              struct btrfs_ioctl_dev_replace_args *args)
 {

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 5538dc7..ab28d9d 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2126,6 +2126,25 @@ int btrfs_find_device_missing_or_by_path(struct btrfs_root *root,
        }
 }
 
+int btrfs_find_device_by_user_input(struct btrfs_root *root, u64 srcdevid,
+                                        char *srcdev_name,
+                                        struct btrfs_device **device)
+{
+       int ret;
+
+       if (srcdevid) {
+               ret = 0;
+               *device = btrfs_find_device(root->fs_info, srcdevid, NULL,
+                                           NULL);
+               if (!*device)
+                       ret = -ENOENT;
+       } else {
+               ret = btrfs_find_device_missing_or_by_path(root, srcdev_name,
+                                                          device);
+       }
+       return ret;
+}
+
 /*
  * does all the dirty work required for changing file system's UUID.
  */

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 1939ebd..5087393 100644 (file)
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -448,6 +448,9 @@ void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices, int step);
 int btrfs_find_device_missing_or_by_path(struct btrfs_root *root,
                                         char *device_path,
                                         struct btrfs_device **device);
+int btrfs_find_device_by_user_input(struct btrfs_root *root, u64 srcdevid,
+                                        char *srcdev_name,
+                                        struct btrfs_device **device);
 struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
                                        const u64 *devid,
                                        const u8 *uuid);