btrfs: Remove unused function btrfs_account_dev_extents_size

This function is not used since the alloc_start parameter has been
obsoleted in commit 0d0c71b317207082856 ("btrfs: obsolete and remove
mount option alloc_start").

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index f532e85..f7191fd 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1258,91 +1258,6 @@ error_bdev_put:
        return ret;
 }
 
-/* helper to account the used device space in the range */
-int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
-                                  u64 end, u64 *length)
-{
-       struct btrfs_key key;
-       struct btrfs_root *root = device->fs_info->dev_root;
-       struct btrfs_dev_extent *dev_extent;
-       struct btrfs_path *path;
-       u64 extent_end;
-       int ret;
-       int slot;
-       struct extent_buffer *l;
-
-       *length = 0;
-
-       if (start >= device->total_bytes ||
-               test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state))
-               return 0;
-
-       path = btrfs_alloc_path();
-       if (!path)
-               return -ENOMEM;
-       path->reada = READA_FORWARD;
-
-       key.objectid = device->devid;
-       key.offset = start;
-       key.type = BTRFS_DEV_EXTENT_KEY;
-
-       ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
-       if (ret < 0)
-               goto out;
-       if (ret > 0) {
-               ret = btrfs_previous_item(root, path, key.objectid, key.type);
-               if (ret < 0)
-                       goto out;
-       }
-
-       while (1) {
-               l = path->nodes[0];
-               slot = path->slots[0];
-               if (slot >= btrfs_header_nritems(l)) {
-                       ret = btrfs_next_leaf(root, path);
-                       if (ret == 0)
-                               continue;
-                       if (ret < 0)
-                               goto out;
-
-                       break;
-               }
-               btrfs_item_key_to_cpu(l, &key, slot);
-
-               if (key.objectid < device->devid)
-                       goto next;
-
-               if (key.objectid > device->devid)
-                       break;
-
-               if (key.type != BTRFS_DEV_EXTENT_KEY)
-                       goto next;
-
-               dev_extent = btrfs_item_ptr(l, slot, struct btrfs_dev_extent);
-               extent_end = key.offset + btrfs_dev_extent_length(l,
-                                                                 dev_extent);
-               if (key.offset <= start && extent_end > end) {
-                       *length = end - start + 1;
-                       break;
-               } else if (key.offset <= start && extent_end > start)
-                       *length += extent_end - start;
-               else if (key.offset > start && extent_end <= end)
-                       *length += extent_end - key.offset;
-               else if (key.offset > start && key.offset <= end) {
-                       *length += end - key.offset + 1;
-                       break;
-               } else if (key.offset > end)
-                       break;
-
-next:
-               path->slots[0]++;
-       }
-       ret = 0;
-out:
-       btrfs_free_path(path);
-       return ret;
-}
-
 static int contains_pending_extent(struct btrfs_transaction *transaction,
                                   struct btrfs_device *device,
                                   u64 *start, u64 len)

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 275c31c..9665b84 100644 (file)
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -384,8 +384,6 @@ static inline enum btrfs_map_op btrfs_op(struct bio *bio)
        }
 }
 
-int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
-                                  u64 end, u64 *length);
 void btrfs_get_bbio(struct btrfs_bio *bbio);
 void btrfs_put_bbio(struct btrfs_bio *bbio);
 int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,