[U-Boot] Subject: [PATCH 0/2] ** Add ext4 filesystem support in uboot **

[uma.shankar at samsung.com]

Hi All,
We at Samsung have implemented ext4 file system support in uboot. Please 
review the subsequent patches.

Thanks & Regards,
Uma Shankar
Manjunatha C Achar


From: Uma Shankar <uma.shankar at samsung.com>
Date: Mon, 12 Dec 2011 12:01:23 +0530
Subject: [PATCH 0/2] *** Add ext4 filesystem support in uboot ***

***
This patch series adds support for ext4 ls,load and write features in uboot
Journaling is supported for write feature.

To Enable EXT4 commands, modify the board specific config file with
#define CONFIG_CMD_EXT2 1
#define CONFIG_CMD_EXT4 1
Steps to test:

1. After applying the patch, ext4 specific commands can be seen
   in the boot loader prompt using
 UBOOT #help

 ext4load- load binary file from a Ext4 file system
 ext4ls  - list files in a directory (default /)
 ext4write- create a file in ext4 formatted partition

2. To list the files in ext4 formatted partition, execute
 ext4ls <interface> <dev[:part]> [directory]
 For example:
 UBOOT #ext4ls mmc 0:5 /usr/lib

3. To read and load a file from an ext4 formatted partition to RAM, execute
 ext4load <interface> <dev[:part]> [addr] [filename] [bytes]
 For example:
 UBOOT #ext4load mmc 2:2 0x30007fc0 uImage

4. To write a file to a ext4 formatted partition.
 a) First load a file to RAM at a particular address for example 0x30007fc0.
 Now execute ext4write command
 ext4write <interface> <dev[:part]> [filename] [Address] [sizebytes]
 For example:
 UBOOT #ext4write mmc 2:2 /boot/uImage 0x30007fc0 6183120
 (here 6183120 is the size of the file to be written)
 Note: Absolute path is required for the file to be written

***

Uma Shankar (2):
  ext4fs ls load support
  ext4fs write support

 Makefile               |    2 +-
 common/Makefile        |    1 +
 common/cmd_ext4.c      |  388 ++++++++++
 fs/Makefile            |    1 +
 fs/ext2/ext2fs.c       |  303 +--------
 fs/ext4/Makefile       |   51 ++
 fs/ext4/crc16.c        |   61 ++
 fs/ext4/crc16.h        |   17 +
 fs/ext4/ext4_common.c  | 1954 
++++++++++++++++++++++++++++++++++++++++++++++++
 fs/ext4/ext4_common.h  |   61 ++
 fs/ext4/ext4_journal.c |  657 ++++++++++++++++
 fs/ext4/ext4_journal.h |  147 ++++
 fs/ext4/ext4fs.c       | 1252 +++++++++++++++++++++++++++++++
 include/ext2fs.h       |  177 +++++-
 include/ext4fs.h       |  172 +++++
 15 files changed, 4937 insertions(+), 307 deletions(-)
 create mode 100644 common/cmd_ext4.c
 create mode 100644 fs/ext4/Makefile
 create mode 100644 fs/ext4/crc16.c
 create mode 100644 fs/ext4/crc16.h
 create mode 100644 fs/ext4/ext4_common.c
 create mode 100644 fs/ext4/ext4_common.h
 create mode 100644 fs/ext4/ext4_journal.c
 create mode 100644 fs/ext4/ext4_journal.h
 create mode 100644 fs/ext4/ext4fs.c
 create mode 100644 include/ext4fs.h