ext4fs ls load support

Signed-off-by: Uma Shankar <uma.shankar@samsung.com>
Signed-off-by: Manjunatha C Achar <a.manjunatha@samsung.com>
Signed-off-by: Iqbal Shareef <iqbal.ams@samsung.com>
Signed-off-by: Hakgoo Lee <goodguy.lee@samsung.com>

1 files changed, 197 insertions, 0 deletions

diff --git a/include/ext_common.h b/include/ext_common.h
new file mode 100644
index 0000000000..c90d95b008
--- /dev/null
+++ b/include/ext_common.h
@@ -0,0 +1,197 @@
+/*
+ * (C) Copyright 2011 - 2012 Samsung Electronics
+ * EXT4 filesystem implementation in Uboot by
+ * Uma Shankar <uma.shankar@samsung.com>
+ * Manjunatha C Achar <a.manjunatha@samsung.com>
+ *
+ * Data structures and headers for ext4 support have been taken from
+ * ext2 ls load support in Uboot
+ *
+ * (C) Copyright 2004
+ * esd gmbh <www.esd-electronics.com>
+ * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
+ *
+ * based on code from grub2 fs/ext2.c and fs/fshelp.c by
+ * GRUB  --  GRand Unified Bootloader
+ * Copyright (C) 2003, 2004  Free Software Foundation, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __EXT_COMMON__
+#define __EXT_COMMON__
+#include <command.h>
+#define SECTOR_SIZE		0x200
+#define SECTOR_BITS		9
+
+/* Magic value used to identify an ext2 filesystem.  */
+#define	EXT2_MAGIC			0xEF53
+/* Amount of indirect blocks in an inode.  */
+#define INDIRECT_BLOCKS			12
+/* Maximum lenght of a pathname.  */
+#define EXT2_PATH_MAX				4096
+/* Maximum nesting of symlinks, used to prevent a loop.  */
+#define	EXT2_MAX_SYMLINKCNT		8
+
+/* Filetype used in directory entry.  */
+#define	FILETYPE_UNKNOWN		0
+#define	FILETYPE_REG			1
+#define	FILETYPE_DIRECTORY		2
+#define	FILETYPE_SYMLINK		7
+
+/* Filetype information as used in inodes.  */
+#define FILETYPE_INO_MASK		0170000
+#define FILETYPE_INO_REG		0100000
+#define FILETYPE_INO_DIRECTORY		0040000
+#define FILETYPE_INO_SYMLINK		0120000
+#define EXT2_ROOT_INO			2 /* Root inode */
+
+/* Bits used as offset in sector */
+#define DISK_SECTOR_BITS		9
+/* The size of an ext2 block in bytes.  */
+#define EXT2_BLOCK_SIZE(data)	   (1 << LOG2_BLOCK_SIZE(data))
+
+/* Log2 size of ext2 block in 512 blocks.  */
+#define LOG2_EXT2_BLOCK_SIZE(data) (__le32_to_cpu \
+				(data->sblock.log2_block_size) + 1)
+
+/* Log2 size of ext2 block in bytes.  */
+#define LOG2_BLOCK_SIZE(data)	   (__le32_to_cpu \
+		(data->sblock.log2_block_size) + 10)
+#define INODE_SIZE_FILESYSTEM(data)	(__le32_to_cpu \
+			(data->sblock.inode_size))
+
+#define EXT2_FT_DIR	2
+#define SUCCESS	1
+
+/* Macro-instructions used to manage several block sizes  */
+#define EXT2_MIN_BLOCK_LOG_SIZE	10 /* 1024 */
+#define EXT2_MAX_BLOCK_LOG_SIZE	16 /* 65536 */
+#define EXT2_MIN_BLOCK_SIZE		(1 << EXT2_MIN_BLOCK_LOG_SIZE)
+#define EXT2_MAX_BLOCK_SIZE		(1 << EXT2_MAX_BLOCK_LOG_SIZE)
+
+/* The ext2 superblock.  */
+struct ext2_sblock {
+	uint32_t total_inodes;
+	uint32_t total_blocks;
+	uint32_t reserved_blocks;
+	uint32_t free_blocks;
+	uint32_t free_inodes;
+	uint32_t first_data_block;
+	uint32_t log2_block_size;
+	uint32_t log2_fragment_size;
+	uint32_t blocks_per_group;
+	uint32_t fragments_per_group;
+	uint32_t inodes_per_group;
+	uint32_t mtime;
+	uint32_t utime;
+	uint16_t mnt_count;
+	uint16_t max_mnt_count;
+	uint16_t magic;
+	uint16_t fs_state;
+	uint16_t error_handling;
+	uint16_t minor_revision_level;
+	uint32_t lastcheck;
+	uint32_t checkinterval;
+	uint32_t creator_os;
+	uint32_t revision_level;
+	uint16_t uid_reserved;
+	uint16_t gid_reserved;
+	uint32_t first_inode;
+	uint16_t inode_size;
+	uint16_t block_group_number;
+	uint32_t feature_compatibility;
+	uint32_t feature_incompat;
+	uint32_t feature_ro_compat;
+	uint32_t unique_id[4];
+	char volume_name[16];
+	char last_mounted_on[64];
+	uint32_t compression_info;
+};
+
+struct ext2_block_group {
+	__u32 block_id;	/* Blocks bitmap block */
+	__u32 inode_id;	/* Inodes bitmap block */
+	__u32 inode_table_id;	/* Inodes table block */
+	__u16 free_blocks;	/* Free blocks count */
+	__u16 free_inodes;	/* Free inodes count */
+	__u16 used_dir_cnt;	/* Directories count */
+	__u16 bg_flags;
+	__u32 bg_reserved[2];
+	__u16 bg_itable_unused; /* Unused inodes count */
+	__u16 bg_checksum;	/* crc16(s_uuid+grouo_num+group_desc)*/
+};
+
+/* The ext2 inode. */
+struct ext2_inode {
+	uint16_t mode;
+	uint16_t uid;
+	uint32_t size;
+	uint32_t atime;
+	uint32_t ctime;
+	uint32_t mtime;
+	uint32_t dtime;
+	uint16_t gid;
+	uint16_t nlinks;
+	uint32_t blockcnt;	/* Blocks of 512 bytes!! */
+	uint32_t flags;
+	uint32_t osd1;
+	union {
+		struct datablocks {
+			uint32_t dir_blocks[INDIRECT_BLOCKS];
+			uint32_t indir_block;
+			uint32_t double_indir_block;
+			uint32_t triple_indir_block;
+		} blocks;
+		char symlink[60];
+	} b;
+	uint32_t version;
+	uint32_t acl;
+	uint32_t dir_acl;
+	uint32_t fragment_addr;
+	uint32_t osd2[3];
+};
+
+/* The header of an ext2 directory entry. */
+struct ext2_dirent {
+	uint32_t inode;
+	uint16_t direntlen;
+	uint8_t namelen;
+	uint8_t filetype;
+};
+
+struct ext2fs_node {
+	struct ext2_data *data;
+	struct ext2_inode inode;
+	int ino;
+	int inode_read;
+};
+
+/* Information about a "mounted" ext2 filesystem. */
+struct ext2_data {
+	struct ext2_sblock sblock;
+	struct ext2_inode *inode;
+	struct ext2fs_node diropen;
+};
+
+int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
+int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
+int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
+					char *const argv[]);
+int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
+int do_ext_load(cmd_tbl_t *cmdtp, int flag, int argc,
+					char *const argv[]);
+int do_ext_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]);
+#endif