[Buildroot] [Bug 7790] New: Invalid ext4 image generated by Buildroot

[Buildroot] [Bug 7790] New: Invalid ext4 image generated by Buildroot

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=7790

           Summary: Invalid ext4 image generated by Buildroot
           Product: buildroot
           Version: 2014.11
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Other
        AssignedTo: unassigned at buildroot.uclibc.org
        ReportedBy: thomas.petazzoni at free-electrons.com
                CC: buildroot at uclibc.org
   Estimated Hours: 0.0


Using:

BR2_arm=y
BR2_cortex_a9=y
BR2_ARM_EABIHF=y
BR2_ARM_ENABLE_NEON=y
BR2_ARM_FPU_VFPV3D16=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y
BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_VERSION=y
BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.18.1"
BR2_LINUX_KERNEL_DEFCONFIG="vexpress"
BR2_LINUX_KERNEL_ZIMAGE=y
BR2_PACKAGE_NFS_UTILS=y
BR2_PACKAGE_RPCBIND=y
BR2_TARGET_ROOTFS_EXT2=y
BR2_TARGET_ROOTFS_EXT2_4=y
# BR2_TARGET_ROOTFS_TAR is not set

I get:

EXT3-fs (mmcblk0): error: couldn't mount because of unsupported optional
features (40)
EXT2-fs (mmcblk0): error: couldn't mount because of unsupported optional
features (40)
EXT4-fs (mmcblk0): bad geometry: block count 6593 exceeds size of device (6400
blocks)
List of all partitions:
1f00          131072 mtdblock0  (driver?)
b300            6400 mmcblk0  driver: mmcblk
No filesystem could mount root, tried:  ext3 ext2 ext4 cramfs squashfs vfat

When using a 3.18 kernel, running under Qemu. I'm attaching the filesystem
image.

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[Buildroot] [Bug 7790] Invalid ext4 image generated by Buildroot

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=7790

Yann E. MORIN <yann.morin.1998@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |yann.morin.1998 at free.fr
         AssignedTo|unassigned at buildroot.uclibc |yann.morin.1998 at free.fr
                   |.org                        |

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[Buildroot] [Bug 7790] Invalid ext4 image generated by Buildroot

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=7790

Thomas Petazzoni <thomas.petazzoni@free-electrons.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID
         AssignedTo|yann.morin.1998 at free.fr     |unassigned at buildroot.uclibc
                   |                            |.org

--- Comment #1 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> 2015-01-10 21:34:17 UTC ---
Turned out to be a Qemu emulation issue: my version of Qemu does not align up
the size of the block device emulated, but aligns it down, compared to the size
of the filesystem image being passed.

For example, when forcing the size of the filesystem image to 8192 blocks,
everything is fine. When using 8193 blocks, mounting fails with:

bad geometry: block count 8193 exceeds size of device (8192 blocks).

Closing the bug.

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