From 27ec95a88943d858433a492940c694bac4bc54d0 Mon Sep 17 00:00:00 2001
From: Jeff Mahoney <jeffm@jeffm.io>
Date: Thu, 20 Oct 2016 11:29:21 -0400
Subject: [PATCH] Add BTRFS Filesystem Metadata Image
Patch-mainline: Submitted to file@mx.gw.com, 20 Oct 2016
The btrfs-image in its uncompressed form contains a directly usable
superblock. Rather than duplicate the superblock printer, split
that out and use it with both the on-disk superblock and the ones
contained within the image.
---
magic/Magdir/filesystems | 37 +++++++++++++++++++++++--------------
1 file changed, 23 insertions(+), 14 deletions(-)
Index: file-5.43/magic/Magdir/filesystems
===================================================================
--- file-5.43.orig/magic/Magdir/filesystems
+++ file-5.43/magic/Magdir/filesystems
@@ -2257,20 +2257,29 @@
>>0x10060 string >\0 lockproto %s)
# Russell Coker <russell@coker.com.au>
-0x10040 string _BHRfS_M BTRFS Filesystem
->0x1012b string >\0 label "%s",
->0x10090 lelong x sectorsize %d,
->0x10094 lelong x nodesize %d,
->0x10098 lelong x leafsize %d,
->0x10020 ubelong x UUID=%08x-
->0x10024 ubeshort x \b%04x-
->0x10026 ubeshort x \b%04x-
->0x10028 ubeshort x \b%04x-
->0x1002a ubeshort x \b%04x
->0x1002c ubelong x \b%08x,
->0x10078 lequad x %lld/
->0x10070 lequad x \b%lld bytes used,
->0x10088 lequad x %lld devices
+0x10040 string _BHRfS_M
+>0x10000 use btrfs_super_block
+0 name btrfs_super_block
+>0x40 string _BHRfS_M BTRFS Filesystem
+>0x12b string >\0 label "%s",
+>0x90 lelong x sectorsize %d,
+>0x94 lelong x nodesize %d,
+>0x98 lelong x leafsize %d,
+>0x20 ubelong x UUID=%08x-
+>0x24 ubeshort x \b%04x-
+>0x26 ubeshort x \b%04x-
+>0x28 ubeshort x \b%04x-
+>0x2a ubeshort x \b%04x
+>0x2c ubelong x \b%08x,
+>0x78 lequad x %lld/
+>0x70 lequad x \b%lld bytes used,
+>0x88 lequad x %lld devices
+
+0 lequad 0xbd5c25e27295668b BTRFS Filesystem Metadata Image
+>20 byte 1 \b, zlib compressed
+>20 byte 0 \b, uncompressed
+>>0x440 string _BHRfS_M \b, contains
+>>>0x400 use btrfs_super_block
0 string btrfs-stream BTRFS stream file