btrfs-progs: show-super: Add option to print superblock at given bytenr

[platform/upstream/btrfs-progs.git] / Documentation / btrfs-show-super.asciidoc

diff --git a/Documentation/btrfs-show-super.asciidoc b/Documentation/btrfs-show-super.asciidoc
index 1646be3..8866c94 100644 (file)
--- a/Documentation/btrfs-show-super.asciidoc
+++ b/Documentation/btrfs-show-super.asciidoc
@@ -40,6 +40,10 @@ If several '-i <super_mirror>' are given, only the last one is valid.
 Attempt to print the superblock even if no superblock magic is found.  May end
 badly.
 
+-s <bytenr>::
+specifiy offset to a superblock in a non-standard location at 'bytenr', useful
+for debugging (disables the '-f' option)
+
 EXIT STATUS
 -----------
 *btrfs-show-super* will return 0 if no error happened.