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* Tue Sep 18 2007 Eric Sandeen <esandeen@redhat.com> 1.40.2-7

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- Fix blkid fat probe when there is a real MBR (#290951)
This commit is contained in:
Eric Sandeen 2007-09-18 17:47:14 +00:00
parent cef67f3f62
commit 1c04cf09dc
2 changed files with 75 additions and 1 deletions
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67
e2fsprogs-1.40.2-blkid-FAT-magic-not-on-strict-position.patch Normal file
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@ -0,0 +1,67 @@
From 3a493033ce3867a2561d60c1016dd0c03999e5eb Mon Sep 17 00:00:00 2001
From: Karel Zak <kzak@redhat.com>
Date: Tue, 18 Sep 2007 15:29:59 +0200
Subject: [PATCH] libblkid: FAT magic is not on strict position when there is a real MBR
There is _optional_ reserved space before FAT:
boot | reserved | FAT | FAT | root | data
sector | space | 1 | 2 | dir | region
for more details see:
http://en.wikipedia.org/wiki/File_Allocation_Table
The probe_fat() code already expects reserved space and other optional
junk in MBR+FAT, but the blkid_magic array expects strictly defined
positions of FAT magic strings. That's correct for 99% partitions, but
not for situation when on the same partition is real MBR. We need to check
for FAT filesystem also when we detect MBR signature (0x55AA on address 510).
The blkid is not able to detect vfat on USB Disks where is only one
bootable partition with vfat, for example:
# file -s /dev/sdc1
/dev/sdc1: x86 boot sector; GRand Unified Bootloader, stage1 version
0x3, 1st sector stage2 0x44ae, code offset 0x48, sectors/cluster 8,
Media descriptor 0xf8, heads 4, sectors 3901408 (volumes > 32 MB) ,
physical drive 0xdb, physical drive 0x5b, reserved 0xe, dos < 4.0
BootSector (0x0)
# vol_id /dev/sdc1
ID_FS_USAGE=filesystem
ID_FS_TYPE=vfat
ID_FS_VERSION=FAT32
ID_FS_UUID=0044-AE80
ID_FS_UUID_ENC=0044-AE80
ID_FS_LABEL=Mdv_Flash
ID_FS_LABEL_ENC=Mdv_Flash
ID_FS_LABEL_SAFE=Mdv_Flash
old version:
# blkid /dev/sdc1
fixed version:
# blkid /dev/sdc1
/dev/sdc1: LABEL="MDV_FLASH" UUID="0044-AE80" TYPE="vfat"
Signed-off-by: Karel Zak <kzak@redhat.com>
---
lib/blkid/probe.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/lib/blkid/probe.c b/lib/blkid/probe.c
index d56292e..42ec234 100644
--- a/lib/blkid/probe.c
+++ b/lib/blkid/probe.c
@@ -849,6 +849,7 @@ static struct blkid_magic type_array[] = {
{ "vfat", 0, 0x36, 8, "FAT12 ", probe_fat },
{ "vfat", 0, 0, 2, "\353\220", probe_fat_nomagic },
{ "vfat", 0, 0, 1, "\351", probe_fat_nomagic },
+ { "vfat", 0, 0x1fe, 2, "\125\252", probe_fat },
{ "minix", 1, 0x10, 2, "\177\023", 0 },
{ "minix", 1, 0x10, 2, "\217\023", 0 },
{ "minix", 1, 0x10, 2, "\150\044", 0 },
--
1.5.2.4

9
e2fsprogs.spec
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@ -4,7 +4,7 @@
Summary: Utilities for managing the second and third extended (ext2/ext3) filesystems
Name: e2fsprogs
Version: 1.40.2
Release: 6%{?dist}
Release: 7%{?dist}
# License based on upstream-modified COPYING file,
# which clearly states "V2" intent.
License: GPLv2
@ -22,6 +22,7 @@ Patch63: e2fsprogs-1.40.2-warning-fixes.patch
Patch64: e2fsprogs-1.40.2-swapfs.patch
Patch65: e2fsprogs-1.40.2-fix-open-create-modes.patch
Patch66: e2fsprogs-1.40.2-protect-open-ops.patch
Patch67: e2fsprogs-1.40.2-blkid-FAT-magic-not-on-strict-position.patch
Url: http://e2fsprogs.sourceforge.net/
BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
@ -100,6 +101,9 @@ also want to install e2fsprogs.
%patch65 -p1 -b .creatmode
# protect ->open ops from glibc open-create-mode-checker
%patch66 -p1 -b .open
# fix fat probe when there is a real MBR
%patch67 -p1 -b .blkid-fat
%build
aclocal
autoconf
@ -260,6 +264,9 @@ exit 0
%{_mandir}/man3/uuid_unparse.3*
%changelog
* Tue Sep 18 2007 Eric Sandeen <esandeen@redhat.com> 1.40.2-7
- Fix blkid fat probe when there is a real MBR (#290951)
* Tue Sep 18 2007 Oliver Falk <oliver@linux-kernel.at> 1.40.2-6
- Add alpha to the header wrappers