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authorSuriyan Ramasami <suriyan.r@gmail.com>2013-10-08 05:39:56 +0400
committerMauro Ribeiro <git@mdrjr.net>2013-10-08 05:39:56 +0400
commit4ac7bdc152e8dd755d6b63324526c534bac3b319 (patch)
tree92a1ed06a2ba8681d356473b75b2dfdbe2c5cce7
parenta9b472caa6a3427a8f02bac71315a65aee2b0935 (diff)
downloadu-boot-4ac7bdc152e8dd755d6b63324526c534bac3b319.tar.xz
Added ext2/ext3/ext4 support.
Added LED lights on the SMSC LAN9730 USB ethernet.
-rw-r--r--Makefile4
-rw-r--r--common/Makefile2
-rw-r--r--common/cmd_ext4.c125
-rw-r--r--drivers/usb/eth/smsc95xx.c14
-rw-r--r--fs/Makefile18
-rw-r--r--fs/ext4/Makefile36
-rw-r--r--fs/ext4/crc16.c62
-rw-r--r--fs/ext4/crc16.h16
-rw-r--r--fs/ext4/dev.c146
-rw-r--r--fs/ext4/ext4_common.c2235
-rw-r--r--fs/ext4/ext4_common.h78
-rw-r--r--fs/ext4/ext4_journal.c653
-rw-r--r--fs/ext4/ext4_journal.h125
-rw-r--r--fs/ext4/ext4_write.c994
-rw-r--r--fs/ext4/ext4fs.c220
-rw-r--r--fs/fs.c354
-rw-r--r--include/common.h17
-rw-r--r--include/configs/smdk4412.h3
-rw-r--r--include/ext4fs.h145
-rw-r--r--include/ext_common.h180
-rw-r--r--include/fs.h68
-rw-r--r--include/sandboxfs.h31
22 files changed, 5520 insertions, 6 deletions
diff --git a/Makefile b/Makefile
index 5fb3d1f564..d456fe143a 100644
--- a/Makefile
+++ b/Makefile
@@ -195,8 +195,8 @@ LIBS += arch/arm/cpu/ixp/npe/libnpe.o
endif
LIBS += arch/$(ARCH)/lib/lib$(ARCH).o
LIBS += fs/cramfs/libcramfs.o fs/fat/libfat.o fs/fdos/libfdos.o fs/jffs2/libjffs2.o \
- fs/reiserfs/libreiserfs.o fs/ext2/libext2fs.o fs/yaffs2/libyaffs2.o \
- fs/ubifs/libubifs.o
+ fs/reiserfs/libreiserfs.o fs/ext4/libext4fs.o fs/yaffs2/libyaffs2.o \
+ fs/ubifs/libubifs.o fs/libfs.o
LIBS += net/libnet.o
LIBS += disk/libdisk.o
LIBS += drivers/bios_emulator/libatibiosemu.o
diff --git a/common/Makefile b/common/Makefile
index 02b1cfe7cd..df286e486e 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -97,7 +97,7 @@ COBJS-$(CONFIG_ENV_IS_IN_EEPROM) += cmd_eeprom.o
COBJS-$(CONFIG_CMD_EEPROM) += cmd_eeprom.o
COBJS-$(CONFIG_CMD_ELF) += cmd_elf.o
COBJS-$(CONFIG_SYS_HUSH_PARSER) += cmd_exit.o
-COBJS-$(CONFIG_CMD_EXT2) += cmd_ext2.o
+COBJS-$(CONFIG_CMD_EXT4) += cmd_ext4.o
COBJS-y += decompress_ext4.o
COBJS-$(CONFIG_CMD_FAT) += cmd_fat.o
COBJS-$(CONFIG_CMD_FDC)$(CONFIG_CMD_FDOS) += cmd_fdc.o
diff --git a/common/cmd_ext4.c b/common/cmd_ext4.c
new file mode 100644
index 0000000000..8289d25b06
--- /dev/null
+++ b/common/cmd_ext4.c
@@ -0,0 +1,125 @@
+/*
+ * (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>
+ *
+ * Ext4fs support
+ * made from existing cmd_ext2.c file of Uboot
+ *
+ * (C) Copyright 2004
+ * esd gmbh <www.esd-electronics.com>
+ * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
+ *
+ * made from cmd_reiserfs by
+ *
+ * (C) Copyright 2003 - 2004
+ * Sysgo Real-Time Solutions, AG <www.elinos.com>
+ * Pavel Bartusek <pba@sysgo.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * Changelog:
+ * 0.1 - Newly created file for ext4fs support. Taken from cmd_ext2.c
+ * file in uboot. Added ext4fs ls load and write support.
+ */
+
+#include <common.h>
+#include <part.h>
+#include <config.h>
+#include <command.h>
+#include <image.h>
+#include <linux/ctype.h>
+#include <asm/byteorder.h>
+#include <ext4fs.h>
+#include <linux/stat.h>
+#include <malloc.h>
+#include <fs.h>
+
+#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
+#include <usb.h>
+#endif
+
+int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ return do_load(cmdtp, flag, argc, argv, FS_TYPE_EXT);
+}
+
+int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+ return do_ls(cmdtp, flag, argc, argv, FS_TYPE_EXT);
+}
+
+#if defined(CONFIG_CMD_EXT4_WRITE)
+int do_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
+ char *const argv[])
+{
+ const char *filename = "/";
+ int dev, part;
+ unsigned long ram_address;
+ unsigned long file_size;
+ disk_partition_t info;
+ block_dev_desc_t *dev_desc;
+
+ if (argc < 6)
+ return cmd_usage(cmdtp);
+
+ part = get_device_and_partition(argv[1], argv[2], &dev_desc, &info, 1);
+ if (part < 0)
+ return 1;
+
+ dev = dev_desc->dev;
+
+ /* get the filename */
+ filename = argv[4];
+
+ /* get the address in hexadecimal format (string to int) */
+ ram_address = simple_strtoul(argv[3], NULL, 16);
+
+ /* get the filesize in base 10 format */
+ file_size = simple_strtoul(argv[5], NULL, 10);
+
+ /* set the device as block device */
+ ext4fs_set_blk_dev(dev_desc, &info);
+
+ /* mount the filesystem */
+ if (!ext4fs_mount(info.size)) {
+ printf("Bad ext4 partition %s %d:%d\n", argv[1], dev, part);
+ goto fail;
+ }
+
+ /* start write */
+ if (ext4fs_write(filename, (unsigned char *)ram_address, file_size)) {
+ printf("** Error ext4fs_write() **\n");
+ goto fail;
+ }
+ ext4fs_close();
+
+ return 0;
+
+fail:
+ ext4fs_close();
+
+ return 1;
+}
+
+U_BOOT_CMD(ext4write, 6, 1, do_ext4_write,
+ "create a file in the root directory",
+ "<interface> <dev[:part]> <addr> <absolute filename path> [sizebytes]\n"
+ " - create a file in / directory");
+
+#endif
+
+U_BOOT_CMD(ext4ls, 4, 1, do_ext4_ls,
+ "list files in a directory (default /)",
+ "<interface> <dev[:part]> [directory]\n"
+ " - list files from 'dev' on 'interface' in a 'directory'");
+
+U_BOOT_CMD(ext4load, 6, 0, do_ext4_load,
+ "load binary file from a Ext4 filesystem",
+ "<interface> <dev[:part]> [addr] [filename] [bytes]\n"
+ " - load binary file 'filename' from 'dev' on 'interface'\n"
+ " to address 'addr' from ext4 filesystem");
diff --git a/drivers/usb/eth/smsc95xx.c b/drivers/usb/eth/smsc95xx.c
index 15fd9a9f78..3aed3ac271 100644
--- a/drivers/usb/eth/smsc95xx.c
+++ b/drivers/usb/eth/smsc95xx.c
@@ -14,6 +14,12 @@
/* SMSC LAN95xx based USB 2.0 Ethernet Devices */
+/* LED defines */
+#define LED_GPIO_CFG (0x24)
+#define LED_GPIO_CFG_SPD_LED (0x01000000)
+#define LED_GPIO_CFG_LNK_LED (0x00100000)
+#define LED_GPIO_CFG_FDX_LED (0x00010000)
+
/* Tx command words */
#define TX_CMD_A_FIRST_SEG_ 0x00002000
#define TX_CMD_A_LAST_SEG_ 0x00001000
@@ -591,6 +597,14 @@ static int smsc95xx_init(struct eth_device *eth, bd_t *bd)
return ret;
debug("ID_REV = 0x%08x\n", read_buf);
+ /* Configure GPIO pins as LED outputs */
+ write_buf = LED_GPIO_CFG_SPD_LED | LED_GPIO_CFG_LNK_LED |
+ LED_GPIO_CFG_FDX_LED;
+ ret = smsc95xx_write_reg(dev, LED_GPIO_CFG, write_buf);
+ if (ret < 0)
+ return ret;
+ debug("LED_GPIO_CFG set\n");
+
/* Init Tx */
write_buf = 0;
ret = smsc95xx_write_reg(dev, FLOW, write_buf);
diff --git a/fs/Makefile b/fs/Makefile
index 22aad126bc..0bf9d72a23 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -20,10 +20,24 @@
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
-#
+
+include $(TOPDIR)/config.mk
+
+LIB = $(obj)libfs.o
+
+COBJS-y += fs.o
+
+COBJS := $(COBJS-y)
+SRCS := $(COBJS:.o=.c)
+OBJS := $(addprefix $(obj),$(COBJS))
+
+all: $(LIB)
+
+$(LIB): $(obj).depend $(OBJS)
+ $(call cmd_link_o_target, $(OBJS))
subdirs-$(CONFIG_CMD_CRAMFS) := cramfs
-subdirs-$(CONFIG_CMD_EXT2) += ext2
+subdirs-$(CONFIG_CMD_EXT4) += ext4
subdirs-$(CONFIG_CMD_FAT) += fat
subdirs-$(CONFIG_CMD_FDOS) += fdos
subdirs-$(CONFIG_CMD_JFFS2) += jffs2
diff --git a/fs/ext4/Makefile b/fs/ext4/Makefile
new file mode 100644
index 0000000000..f45bb324ec
--- /dev/null
+++ b/fs/ext4/Makefile
@@ -0,0 +1,36 @@
+#
+# (C) Copyright 2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# (C) Copyright 2003
+# Pavel Bartusek, Sysgo Real-Time Solutions AG, pba@sysgo.de
+#
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+include $(TOPDIR)/config.mk
+
+LIB = $(obj)libext4fs.o
+
+AOBJS =
+COBJS-$(CONFIG_FS_EXT4) := ext4fs.o ext4_common.o dev.o
+COBJS-$(CONFIG_EXT4_WRITE) += ext4_write.o ext4_journal.o crc16.o
+
+SRCS := $(AOBJS:.o=.S) $(COBJS-y:.o=.c)
+OBJS := $(addprefix $(obj),$(AOBJS) $(COBJS-y))
+
+
+all: $(LIB) $(AOBJS)
+
+$(LIB): $(obj).depend $(OBJS)
+ $(call cmd_link_o_target, $(OBJS))
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
diff --git a/fs/ext4/crc16.c b/fs/ext4/crc16.c
new file mode 100644
index 0000000000..3afb34daef
--- /dev/null
+++ b/fs/ext4/crc16.c
@@ -0,0 +1,62 @@
+/*
+ * crc16.c
+ *
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+
+#include <common.h>
+#include <asm/byteorder.h>
+#include <linux/stat.h>
+#include "crc16.h"
+
+/** CRC table for the CRC-16. The poly is 0x8005 (x16 + x15 + x2 + 1) */
+static __u16 const crc16_table[256] = {
+ 0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
+ 0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
+ 0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
+ 0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
+ 0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
+ 0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
+ 0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
+ 0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
+ 0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
+ 0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
+ 0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
+ 0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
+ 0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
+ 0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
+ 0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
+ 0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
+ 0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
+ 0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
+ 0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
+ 0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
+ 0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
+ 0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
+ 0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
+ 0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
+ 0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
+ 0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
+ 0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
+ 0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
+ 0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
+ 0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
+ 0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
+ 0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
+};
+
+/**
+ * Compute the CRC-16 for the data buffer
+*/
+
+unsigned int ext2fs_crc16(unsigned int crc,
+ const void *buffer, unsigned int len)
+{
+ const unsigned char *cp = buffer;
+
+ while (len--)
+ crc = (((crc >> 8) & 0xffU) ^
+ crc16_table[(crc ^ *cp++) & 0xffU]) & 0x0000ffffU;
+ return crc;
+}
diff --git a/fs/ext4/crc16.h b/fs/ext4/crc16.h
new file mode 100644
index 0000000000..5fd113a56c
--- /dev/null
+++ b/fs/ext4/crc16.h
@@ -0,0 +1,16 @@
+/*
+ * crc16.h - CRC-16 routine
+ * Implements the standard CRC-16:
+ * Width 16
+ * Poly 0x8005 (x16 + x15 + x2 + 1)
+ * Init 0
+ *
+ * Copyright (c) 2005 Ben Gardner <bgardner@wabtec.com>
+ * This source code is licensed under the GNU General Public License,
+ * Version 2. See the file COPYING for more details.
+ */
+#ifndef __CRC16_H
+#define __CRC16_H
+extern unsigned int ext2fs_crc16(unsigned int crc,
+ const void *buffer, unsigned int len);
+#endif
diff --git a/fs/ext4/dev.c b/fs/ext4/dev.c
new file mode 100644
index 0000000000..787e04133a
--- /dev/null
+++ b/fs/ext4/dev.c
@@ -0,0 +1,146 @@
+/*
+ * (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>
+ *
+ * made from existing ext2/dev.c file of Uboot
+ * (C) Copyright 2004
+ * esd gmbh <www.esd-electronics.com>
+ * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
+ *
+ * based on code of fs/reiserfs/dev.c by
+ *
+ * (C) Copyright 2003 - 2004
+ * Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * Changelog:
+ * 0.1 - Newly created file for ext4fs support. Taken from
+ * fs/ext2/dev.c file in uboot.
+ */
+
+#include <common.h>
+#include <config.h>
+#include <ext4fs.h>
+#include <ext_common.h>
+#include "ext4_common.h"
+
+lbaint_t part_offset;
+
+static block_dev_desc_t *ext4fs_block_dev_desc;
+static disk_partition_t *part_info;
+
+void ext4fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info)
+{
+ assert(rbdd->blksz == (1 << rbdd->log2blksz));
+ ext4fs_block_dev_desc = rbdd;
+ get_fs()->dev_desc = rbdd;
+ part_info = info;
+ part_offset = info->start;
+ get_fs()->total_sect = (info->size * info->blksz) >>
+ get_fs()->dev_desc->log2blksz;
+}
+
+int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len, char *buf)
+{
+ unsigned block_len;
+ int log2blksz = ext4fs_block_dev_desc->log2blksz;
+ ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, (ext4fs_block_dev_desc ?
+ ext4fs_block_dev_desc->blksz :
+ 0));
+ if (ext4fs_block_dev_desc == NULL) {
+ printf("** Invalid Block Device Descriptor (NULL)\n");
+ return 0;
+ }
+
+ /* Check partition boundaries */
+ if ((sector < 0) ||
+ ((sector + ((byte_offset + byte_len - 1) >> log2blksz))
+ >= part_info->size)) {
+ printf("%s read outside partition " LBAFU "\n", __func__,
+ sector);
+ return 0;
+ }
+
+ /* Get the read to the beginning of a partition */
+ sector += byte_offset >> log2blksz;
+ byte_offset &= ext4fs_block_dev_desc->blksz - 1;
+
+ debug(" <" LBAFU ", %d, %d>\n", sector, byte_offset, byte_len);
+
+ if (byte_offset != 0) {
+ /* read first part which isn't aligned with start of sector */
+ if (ext4fs_block_dev_desc->
+ block_read(ext4fs_block_dev_desc->dev,
+ part_info->start + sector, 1,
+ (unsigned long *) sec_buf) != 1) {
+ printf(" ** ext2fs_devread() read error **\n");
+ return 0;
+ }
+ memcpy(buf, sec_buf + byte_offset,
+ min(ext4fs_block_dev_desc->blksz
+ - byte_offset, byte_len));
+ buf += min(ext4fs_block_dev_desc->blksz
+ - byte_offset, byte_len);
+ byte_len -= min(ext4fs_block_dev_desc->blksz
+ - byte_offset, byte_len);
+ sector++;
+ }
+
+ if (byte_len == 0)
+ return 1;
+
+ /* read sector aligned part */
+ block_len = byte_len & ~(ext4fs_block_dev_desc->blksz - 1);
+
+ if (block_len == 0) {
+ ALLOC_CACHE_ALIGN_BUFFER(u8, p, ext4fs_block_dev_desc->blksz);
+
+ block_len = ext4fs_block_dev_desc->blksz;
+ ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc->dev,
+ part_info->start + sector,
+ 1, (unsigned long *)p);
+ memcpy(buf, p, byte_len);
+ return 1;
+ }
+
+ if (ext4fs_block_dev_desc->block_read(ext4fs_block_dev_desc->dev,
+ part_info->start + sector,
+ block_len >> log2blksz,
+ (unsigned long *) buf) !=
+ block_len >> log2blksz) {
+ printf(" ** %s read error - block\n", __func__);
+ return 0;
+ }
+ block_len = byte_len & ~(ext4fs_block_dev_desc->blksz - 1);
+ buf += block_len;
+ byte_len -= block_len;
+ sector += block_len / ext4fs_block_dev_desc->blksz;
+
+ if (byte_len != 0) {
+ /* read rest of data which are not in whole sector */
+ if (ext4fs_block_dev_desc->
+ block_read(ext4fs_block_dev_desc->dev,
+ part_info->start + sector, 1,
+ (unsigned long *) sec_buf) != 1) {
+ printf("* %s read error - last part\n", __func__);
+ return 0;
+ }
+ memcpy(buf, sec_buf, byte_len);
+ }
+ return 1;
+}
+
+int ext4_read_superblock(char *buffer)
+{
+ struct ext_filesystem *fs = get_fs();
+ int sect = SUPERBLOCK_START >> fs->dev_desc->log2blksz;
+ int off = SUPERBLOCK_START % fs->dev_desc->blksz;
+
+ return ext4fs_devread(sect, off, SUPERBLOCK_SIZE,
+ buffer);
+}
diff --git a/fs/ext4/ext4_common.c b/fs/ext4/ext4_common.c
new file mode 100644
index 0000000000..352943ec51
--- /dev/null
+++ b/fs/ext4/ext4_common.c
@@ -0,0 +1,2235 @@
+/*
+ * (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>
+ *
+ * ext4ls and ext4load : Based on 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.
+ *
+ * ext4write : Based on generic ext4 protocol.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <ext_common.h>
+#include <ext4fs.h>
+#include <malloc.h>
+#include <stddef.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+#include <asm/byteorder.h>
+#include "ext4_common.h"
+
+struct ext2_data *ext4fs_root;
+struct ext2fs_node *ext4fs_file;
+uint32_t *ext4fs_indir1_block;
+int ext4fs_indir1_size;
+int ext4fs_indir1_blkno = -1;
+uint32_t *ext4fs_indir2_block;
+int ext4fs_indir2_size;
+int ext4fs_indir2_blkno = -1;
+
+uint32_t *ext4fs_indir3_block;
+int ext4fs_indir3_size;
+int ext4fs_indir3_blkno = -1;
+struct ext2_inode *g_parent_inode;
+static int symlinknest;
+
+#if defined(CONFIG_EXT4_WRITE)
+uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n)
+{
+ uint32_t res = size / n;
+ if (res * n != size)
+ res++;
+
+ return res;
+}
+
+void put_ext4(uint64_t off, void *buf, uint32_t size)
+{
+ uint64_t startblock;
+ uint64_t remainder;
+ unsigned char *temp_ptr = NULL;
+ struct ext_filesystem *fs = get_fs();
+ int log2blksz = fs->dev_desc->log2blksz;
+ ALLOC_CACHE_ALIGN_BUFFER(unsigned char, sec_buf, fs->dev_desc->blksz);
+
+ startblock = off >> log2blksz;
+ startblock += part_offset;
+ remainder = off & (uint64_t)(fs->dev_desc->blksz - 1);
+
+ if (fs->dev_desc == NULL)
+ return;
+
+ if ((startblock + (size >> log2blksz)) >
+ (part_offset + fs->total_sect)) {
+ printf("part_offset is " LBAFU "\n", part_offset);
+ printf("total_sector is %llu\n", fs->total_sect);
+ printf("error: overflow occurs\n");
+ return;
+ }
+
+ if (remainder) {
+ if (fs->dev_desc->block_read) {
+ fs->dev_desc->block_read(fs->dev_desc->dev,
+ startblock, 1, sec_buf);
+ temp_ptr = sec_buf;
+ memcpy((temp_ptr + remainder),
+ (unsigned char *)buf, size);
+ fs->dev_desc->block_write(fs->dev_desc->dev,
+ startblock, 1, sec_buf);
+ }
+ } else {
+ if (size >> log2blksz != 0) {
+ fs->dev_desc->block_write(fs->dev_desc->dev,
+ startblock,
+ size >> log2blksz,
+ (unsigned long *)buf);
+ } else {
+ fs->dev_desc->block_read(fs->dev_desc->dev,
+ startblock, 1, sec_buf);
+ temp_ptr = sec_buf;
+ memcpy(temp_ptr, buf, size);
+ fs->dev_desc->block_write(fs->dev_desc->dev,
+ startblock, 1,
+ (unsigned long *)sec_buf);
+ }
+ }
+}
+
+static int _get_new_inode_no(unsigned char *buffer)
+{
+ struct ext_filesystem *fs = get_fs();
+ unsigned char input;
+ int operand, status;
+ int count = 1;
+ int j = 0;
+
+ /* get the blocksize of the filesystem */
+ unsigned char *ptr = buffer;
+ while (*ptr == 255) {
+ ptr++;
+ count += 8;
+ if (count > ext4fs_root->sblock.inodes_per_group)
+ return -1;
+ }
+
+ for (j = 0; j < fs->blksz; j++) {
+ input = *ptr;
+ int i = 0;
+ while (i <= 7) {
+ operand = 1 << i;
+ status = input & operand;
+ if (status) {
+ i++;
+ count++;
+ } else {
+ *ptr |= operand;
+ return count;
+ }
+ }
+ ptr = ptr + 1;
+ }
+
+ return -1;
+}
+
+static int _get_new_blk_no(unsigned char *buffer)
+{
+ unsigned char input;
+ int operand, status;
+ int count = 0;
+ int j = 0;
+ unsigned char *ptr = buffer;
+ struct ext_filesystem *fs = get_fs();
+
+ if (fs->blksz != 1024)
+ count = 0;
+ else
+ count = 1;
+
+ while (*ptr == 255) {
+ ptr++;
+ count += 8;
+ if (count == (fs->blksz * 8))
+ return -1;
+ }
+
+ for (j = 0; j < fs->blksz; j++) {
+ input = *ptr;
+ int i = 0;
+ while (i <= 7) {
+ operand = 1 << i;
+ status = input & operand;
+ if (status) {
+ i++;
+ count++;
+ } else {
+ *ptr |= operand;
+ return count;
+ }
+ }
+ ptr = ptr + 1;
+ }
+
+ return -1;
+}
+
+int ext4fs_set_block_bmap(long int blockno, unsigned char *buffer, int index)
+{
+ int i, remainder, status;
+ unsigned char *ptr = buffer;
+ unsigned char operand;
+ i = blockno / 8;
+ remainder = blockno % 8;
+ int blocksize = EXT2_BLOCK_SIZE(ext4fs_root);
+
+ i = i - (index * blocksize);
+ if (blocksize != 1024) {
+ ptr = ptr + i;
+ operand = 1 << remainder;
+ status = *ptr & operand;
+ if (status)
+ return -1;
+
+ *ptr = *ptr | operand;
+ return 0;
+ } else {
+ if (remainder == 0) {
+ ptr = ptr + i - 1;
+ operand = (1 << 7);
+ } else {
+ ptr = ptr + i;
+ operand = (1 << (remainder - 1));
+ }
+ status = *ptr & operand;
+ if (status)
+ return -1;
+
+ *ptr = *ptr | operand;
+ return 0;
+ }
+}
+
+void ext4fs_reset_block_bmap(long int blockno, unsigned char *buffer, int index)
+{
+ int i, remainder, status;
+ unsigned char *ptr = buffer;
+ unsigned char operand;
+ i = blockno / 8;
+ remainder = blockno % 8;
+ int blocksize = EXT2_BLOCK_SIZE(ext4fs_root);
+
+ i = i - (index * blocksize);
+ if (blocksize != 1024) {
+ ptr = ptr + i;
+ operand = (1 << remainder);
+ status = *ptr & operand;
+ if (status)
+ *ptr = *ptr & ~(operand);
+ } else {
+ if (remainder == 0) {
+ ptr = ptr + i - 1;
+ operand = (1 << 7);
+ } else {
+ ptr = ptr + i;
+ operand = (1 << (remainder - 1));
+ }
+ status = *ptr & operand;
+ if (status)
+ *ptr = *ptr & ~(operand);
+ }
+}
+
+int ext4fs_set_inode_bmap(int inode_no, unsigned char *buffer, int index)
+{
+ int i, remainder, status;
+ unsigned char *ptr = buffer;
+ unsigned char operand;
+
+ inode_no -= (index * ext4fs_root->sblock.inodes_per_group);
+ i = inode_no / 8;
+ remainder = inode_no % 8;
+ if (remainder == 0) {
+ ptr = ptr + i - 1;
+ operand = (1 << 7);
+ } else {
+ ptr = ptr + i;
+ operand = (1 << (remainder - 1));
+ }
+ status = *ptr & operand;
+ if (status)
+ return -1;
+
+ *ptr = *ptr | operand;
+
+ return 0;
+}
+
+void ext4fs_reset_inode_bmap(int inode_no, unsigned char *buffer, int index)
+{
+ int i, remainder, status;
+ unsigned char *ptr = buffer;
+ unsigned char operand;
+
+ inode_no -= (index * ext4fs_root->sblock.inodes_per_group);
+ i = inode_no / 8;
+ remainder = inode_no % 8;
+ if (remainder == 0) {
+ ptr = ptr + i - 1;
+ operand = (1 << 7);
+ } else {
+ ptr = ptr + i;
+ operand = (1 << (remainder - 1));
+ }
+ status = *ptr & operand;
+ if (status)
+ *ptr = *ptr & ~(operand);
+}
+
+int ext4fs_checksum_update(unsigned int i)
+{
+ struct ext2_block_group *desc;
+ struct ext_filesystem *fs = get_fs();
+ __u16 crc = 0;
+
+ desc = (struct ext2_block_group *)&fs->bgd[i];
+ if (fs->sb->feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
+ int offset = offsetof(struct ext2_block_group, bg_checksum);
+
+ crc = ext2fs_crc16(~0, fs->sb->unique_id,
+ sizeof(fs->sb->unique_id));
+ crc = ext2fs_crc16(crc, &i, sizeof(i));
+ crc = ext2fs_crc16(crc, desc, offset);
+ offset += sizeof(desc->bg_checksum); /* skip checksum */
+ assert(offset == sizeof(*desc));
+ }
+
+ return crc;
+}
+
+static int check_void_in_dentry(struct ext2_dirent *dir, char *filename)
+{
+ int dentry_length;
+ int sizeof_void_space;
+ int new_entry_byte_reqd;
+ short padding_factor = 0;
+
+ if (dir->namelen % 4 != 0)
+ padding_factor = 4 - (dir->namelen % 4);
+
+ dentry_length = sizeof(struct ext2_dirent) +
+ dir->namelen + padding_factor;
+ sizeof_void_space = dir->direntlen - dentry_length;
+ if (sizeof_void_space == 0)
+ return 0;
+
+ padding_factor = 0;
+ if (strlen(filename) % 4 != 0)
+ padding_factor = 4 - (strlen(filename) % 4);
+
+ new_entry_byte_reqd = strlen(filename) +
+ sizeof(struct ext2_dirent) + padding_factor;
+ if (sizeof_void_space >= new_entry_byte_reqd) {
+ dir->direntlen = dentry_length;
+ return sizeof_void_space;
+ }
+
+ return 0;
+}
+
+void ext4fs_update_parent_dentry(char *filename, int *p_ino, int file_type)
+{
+ unsigned int *zero_buffer = NULL;
+ char *root_first_block_buffer = NULL;
+ int direct_blk_idx;
+ long int root_blknr;
+ long int first_block_no_of_root = 0;
+ long int previous_blknr = -1;
+ int totalbytes = 0;
+ short int padding_factor = 0;
+ unsigned int new_entry_byte_reqd;
+ unsigned int last_entry_dirlen;
+ int sizeof_void_space = 0;
+ int templength = 0;
+ int inodeno;
+ int status;
+ struct ext_filesystem *fs = get_fs();
+ /* directory entry */
+ struct ext2_dirent *dir;
+ char *temp_dir = NULL;
+
+ zero_buffer = zalloc(fs->blksz);
+ if (!zero_buffer) {
+ printf("No Memory\n");
+ return;
+ }
+ root_first_block_buffer = zalloc(fs->blksz);
+ if (!root_first_block_buffer) {
+ free(zero_buffer);
+ printf("No Memory\n");
+ return;
+ }
+restart:
+
+ /* read the block no allocated to a file */
+ for (direct_blk_idx = 0; direct_blk_idx < INDIRECT_BLOCKS;
+ direct_blk_idx++) {
+ root_blknr = read_allocated_block(g_parent_inode,
+ direct_blk_idx);
+ if (root_blknr == 0) {
+ first_block_no_of_root = previous_blknr;
+ break;
+ }
+ previous_blknr = root_blknr;
+ }
+
+ status = ext4fs_devread((lbaint_t)first_block_no_of_root
+ * fs->sect_perblk,
+ 0, fs->blksz, root_first_block_buffer);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_journal(root_first_block_buffer, first_block_no_of_root))
+ goto fail;
+ dir = (struct ext2_dirent *)root_first_block_buffer;
+ totalbytes = 0;
+ while (dir->direntlen > 0) {
+ /*
+ * blocksize-totalbytes because last directory length
+ * i.e. dir->direntlen is free availble space in the
+ * block that means it is a last entry of directory
+ * entry
+ */
+
+ /* traversing the each directory entry */
+ if (fs->blksz - totalbytes == dir->direntlen) {
+ if (strlen(filename) % 4 != 0)
+ padding_factor = 4 - (strlen(filename) % 4);
+
+ new_entry_byte_reqd = strlen(filename) +
+ sizeof(struct ext2_dirent) + padding_factor;
+ padding_factor = 0;
+ /*
+ * update last directory entry length to its
+ * length because we are creating new directory
+ * entry
+ */
+ if (dir->namelen % 4 != 0)
+ padding_factor = 4 - (dir->namelen % 4);
+
+ last_entry_dirlen = dir->namelen +
+ sizeof(struct ext2_dirent) + padding_factor;
+ if ((fs->blksz - totalbytes - last_entry_dirlen) <
+ new_entry_byte_reqd) {
+ printf("1st Block Full:Allocate new block\n");
+
+ if (direct_blk_idx == INDIRECT_BLOCKS - 1) {
+ printf("Directory exceeds limit\n");
+ goto fail;
+ }
+ g_parent_inode->b.blocks.dir_blocks
+ [direct_blk_idx] = ext4fs_get_new_blk_no();
+ if (g_parent_inode->b.blocks.dir_blocks
+ [direct_blk_idx] == -1) {
+ printf("no block left to assign\n");
+ goto fail;
+ }
+ put_ext4(((uint64_t)
+ (g_parent_inode->b.
+ blocks.dir_blocks[direct_blk_idx] *
+ fs->blksz)), zero_buffer, fs->blksz);
+ g_parent_inode->size =
+ g_parent_inode->size + fs->blksz;
+ g_parent_inode->blockcnt =
+ g_parent_inode->blockcnt + fs->sect_perblk;
+ if (ext4fs_put_metadata
+ (root_first_block_buffer,
+ first_block_no_of_root))
+ goto fail;
+ goto restart;
+ }
+ dir->direntlen = last_entry_dirlen;
+ break;
+ }
+
+ templength = dir->direntlen;
+ totalbytes = totalbytes + templength;
+ sizeof_void_space = check_void_in_dentry(dir, filename);
+ if (sizeof_void_space)
+ break;
+
+ dir = (struct ext2_dirent *)((char *)dir + templength);
+ }
+
+ /* make a pointer ready for creating next directory entry */
+ templength = dir->direntlen;
+ totalbytes = totalbytes + templength;
+ dir = (struct ext2_dirent *)((char *)dir + templength);
+
+ /* get the next available inode number */
+ inodeno = ext4fs_get_new_inode_no();
+ if (inodeno == -1) {
+ printf("no inode left to assign\n");
+ goto fail;
+ }
+ dir->inode = inodeno;
+ if (sizeof_void_space)
+ dir->direntlen = sizeof_void_space;
+ else
+ dir->direntlen = fs->blksz - totalbytes;
+
+ dir->namelen = strlen(filename);
+ dir->filetype = FILETYPE_REG; /* regular file */
+ temp_dir = (char *)dir;
+ temp_dir = temp_dir + sizeof(struct ext2_dirent);
+ memcpy(temp_dir, filename, strlen(filename));
+
+ *p_ino = inodeno;
+
+ /* update or write the 1st block of root inode */
+ if (ext4fs_put_metadata(root_first_block_buffer,
+ first_block_no_of_root))
+ goto fail;
+
+fail:
+ free(zero_buffer);
+ free(root_first_block_buffer);
+}
+
+static int search_dir(struct ext2_inode *parent_inode, char *dirname)
+{
+ int status;
+ int inodeno;
+ int totalbytes;
+ int templength;
+ int direct_blk_idx;
+ long int blknr;
+ int found = 0;
+ char *ptr = NULL;
+ unsigned char *block_buffer = NULL;
+ struct ext2_dirent *dir = NULL;
+ struct ext2_dirent *previous_dir = NULL;
+ struct ext_filesystem *fs = get_fs();
+
+ /* read the block no allocated to a file */
+ for (direct_blk_idx = 0; direct_blk_idx < INDIRECT_BLOCKS;
+ direct_blk_idx++) {
+ blknr = read_allocated_block(parent_inode, direct_blk_idx);
+ if (blknr == 0)
+ goto fail;
+
+ /* read the blocks of parenet inode */
+ block_buffer = zalloc(fs->blksz);
+ if (!block_buffer)
+ goto fail;
+
+ status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk,
+ 0, fs->blksz, (char *)block_buffer);
+ if (status == 0)
+ goto fail;
+
+ dir = (struct ext2_dirent *)block_buffer;
+ ptr = (char *)dir;
+ totalbytes = 0;
+ while (dir->direntlen >= 0) {
+ /*
+ * blocksize-totalbytes because last directory
+ * length i.e.,*dir->direntlen is free availble
+ * space in the block that means
+ * it is a last entry of directory entry
+ */
+ if (strlen(dirname) == dir->namelen) {
+ if (strncmp(dirname, ptr +
+ sizeof(struct ext2_dirent),
+ dir->namelen) == 0) {
+ previous_dir->direntlen +=
+ dir->direntlen;
+ inodeno = dir->inode;
+ dir->inode = 0;
+ found = 1;
+ break;
+ }
+ }
+
+ if (fs->blksz - totalbytes == dir->direntlen)
+ break;
+
+ /* traversing the each directory entry */
+ templength = dir->direntlen;
+ totalbytes = totalbytes + templength;
+ previous_dir = dir;
+ dir = (struct ext2_dirent *)((char *)dir + templength);
+ ptr = (char *)dir;
+ }
+
+ if (found == 1) {
+ free(block_buffer);
+ block_buffer = NULL;
+ return inodeno;
+ }
+
+ free(block_buffer);
+ block_buffer = NULL;
+ }
+
+fail:
+ free(block_buffer);
+
+ return -1;
+}
+
+static int find_dir_depth(char *dirname)
+{
+ char *token = strtok(dirname, "/");
+ int count = 0;
+ while (token != NULL) {
+ token = strtok(NULL, "/");
+ count++;
+ }
+ return count + 1 + 1;
+ /*
+ * for example for string /home/temp
+ * depth=home(1)+temp(1)+1 extra for NULL;
+ * so count is 4;
+ */
+}
+
+static int parse_path(char **arr, char *dirname)
+{
+ char *token = strtok(dirname, "/");
+ int i = 0;
+
+ /* add root */
+ arr[i] = zalloc(strlen("/") + 1);
+ if (!arr[i])
+ return -ENOMEM;
+
+ arr[i++] = "/";
+
+ /* add each path entry after root */
+ while (token != NULL) {
+ arr[i] = zalloc(strlen(token) + 1);
+ if (!arr[i])
+ return -ENOMEM;
+ memcpy(arr[i++], token, strlen(token));
+ token = strtok(NULL, "/");
+ }
+ arr[i] = NULL;
+
+ return 0;
+}
+
+int ext4fs_iget(int inode_no, struct ext2_inode *inode)
+{
+ if (ext4fs_read_inode(ext4fs_root, inode_no, inode) == 0)
+ return -1;
+
+ return 0;
+}
+
+/*
+ * Function: ext4fs_get_parent_inode_num
+ * Return Value: inode Number of the parent directory of file/Directory to be
+ * created
+ * dirname : Input parmater, input path name of the file/directory to be created
+ * dname : Output parameter, to be filled with the name of the directory
+ * extracted from dirname
+ */
+int ext4fs_get_parent_inode_num(const char *dirname, char *dname, int flags)
+{
+ int i;
+ int depth = 0;
+ int matched_inode_no;
+ int result_inode_no = -1;
+ char **ptr = NULL;
+ char *depth_dirname = NULL;
+ char *parse_dirname = NULL;
+ struct ext2_inode *parent_inode = NULL;
+ struct ext2_inode *first_inode = NULL;
+ struct ext2_inode temp_inode;
+
+ if (*dirname != '/') {
+ printf("Please supply Absolute path\n");
+ return -1;
+ }
+
+ /* TODO: input validation make equivalent to linux */
+ depth_dirname = zalloc(strlen(dirname) + 1);
+ if (!depth_dirname)
+ return -ENOMEM;
+
+ memcpy(depth_dirname, dirname, strlen(dirname));
+ depth = find_dir_depth(depth_dirname);
+ parse_dirname = zalloc(strlen(dirname) + 1);
+ if (!parse_dirname)
+ goto fail;
+ memcpy(parse_dirname, dirname, strlen(dirname));
+
+ /* allocate memory for each directory level */
+ ptr = zalloc((depth) * sizeof(char *));
+ if (!ptr)
+ goto fail;
+ if (parse_path(ptr, parse_dirname))
+ goto fail;
+ parent_inode = zalloc(sizeof(struct ext2_inode));
+ if (!parent_inode)
+ goto fail;
+ first_inode = zalloc(sizeof(struct ext2_inode));
+ if (!first_inode)
+ goto fail;
+ memcpy(parent_inode, ext4fs_root->inode, sizeof(struct ext2_inode));
+ memcpy(first_inode, parent_inode, sizeof(struct ext2_inode));
+ if (flags & F_FILE)
+ result_inode_no = EXT2_ROOT_INO;
+ for (i = 1; i < depth; i++) {
+ matched_inode_no = search_dir(parent_inode, ptr[i]);
+ if (matched_inode_no == -1) {
+ if (ptr[i + 1] == NULL && i == 1) {
+ result_inode_no = EXT2_ROOT_INO;
+ goto end;
+ } else {
+ if (ptr[i + 1] == NULL)
+ break;
+ printf("Invalid path\n");
+ result_inode_no = -1;
+ goto fail;
+ }
+ } else {
+ if (ptr[i + 1] != NULL) {
+ memset(parent_inode, '\0',
+ sizeof(struct ext2_inode));
+ if (ext4fs_iget(matched_inode_no,
+ parent_inode)) {
+ result_inode_no = -1;
+ goto fail;
+ }
+ result_inode_no = matched_inode_no;
+ } else {
+ break;
+ }
+ }
+ }
+
+end:
+ if (i == 1)
+ matched_inode_no = search_dir(first_inode, ptr[i]);
+ else
+ matched_inode_no = search_dir(parent_inode, ptr[i]);
+
+ if (matched_inode_no != -1) {
+ ext4fs_iget(matched_inode_no, &temp_inode);
+ if (temp_inode.mode & S_IFDIR) {
+ printf("It is a Directory\n");
+ result_inode_no = -1;
+ goto fail;
+ }
+ }
+
+ if (strlen(ptr[i]) > 256) {
+ result_inode_no = -1;
+ goto fail;
+ }
+ memcpy(dname, ptr[i], strlen(ptr[i]));
+
+fail:
+ free(depth_dirname);
+ free(parse_dirname);
+ free(ptr);
+ free(parent_inode);
+ free(first_inode);
+
+ return result_inode_no;
+}
+
+static int check_filename(char *filename, unsigned int blknr)
+{
+ unsigned int first_block_no_of_root;
+ int totalbytes = 0;
+ int templength = 0;
+ int status, inodeno;
+ int found = 0;
+ char *root_first_block_buffer = NULL;
+ char *root_first_block_addr = NULL;
+ struct ext2_dirent *dir = NULL;
+ struct ext2_dirent *previous_dir = NULL;
+ char *ptr = NULL;
+ struct ext_filesystem *fs = get_fs();
+
+ /* get the first block of root */
+ first_block_no_of_root = blknr;
+ root_first_block_buffer = zalloc(fs->blksz);
+ if (!root_first_block_buffer)
+ return -ENOMEM;
+ root_first_block_addr = root_first_block_buffer;
+ status = ext4fs_devread((lbaint_t)first_block_no_of_root *
+ fs->sect_perblk, 0,
+ fs->blksz, root_first_block_buffer);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_journal(root_first_block_buffer, first_block_no_of_root))
+ goto fail;
+ dir = (struct ext2_dirent *)root_first_block_buffer;
+ ptr = (char *)dir;
+ totalbytes = 0;
+ while (dir->direntlen >= 0) {
+ /*
+ * blocksize-totalbytes because last
+ * directory length i.e., *dir->direntlen
+ * is free availble space in the block that
+ * means it is a last entry of directory entry
+ */
+ if (strlen(filename) == dir->namelen) {
+ if (strncmp(filename, ptr + sizeof(struct ext2_dirent),
+ dir->namelen) == 0) {
+ printf("file found deleting\n");
+ previous_dir->direntlen += dir->direntlen;
+ inodeno = dir->inode;
+ dir->inode = 0;
+ found = 1;
+ break;
+ }
+ }
+
+ if (fs->blksz - totalbytes == dir->direntlen)
+ break;
+
+ /* traversing the each directory entry */
+ templength = dir->direntlen;
+ totalbytes = totalbytes + templength;
+ previous_dir = dir;
+ dir = (struct ext2_dirent *)((char *)dir + templength);
+ ptr = (char *)dir;
+ }
+
+
+ if (found == 1) {
+ if (ext4fs_put_metadata(root_first_block_addr,
+ first_block_no_of_root))
+ goto fail;
+ return inodeno;
+ }
+fail:
+ free(root_first_block_buffer);
+
+ return -1;
+}
+
+int ext4fs_filename_check(char *filename)
+{
+ short direct_blk_idx = 0;
+ long int blknr = -1;
+ int inodeno = -1;
+
+ /* read the block no allocated to a file */
+ for (direct_blk_idx = 0; direct_blk_idx < INDIRECT_BLOCKS;
+ direct_blk_idx++) {
+ blknr = read_allocated_block(g_parent_inode, direct_blk_idx);
+ if (blknr == 0)
+ break;
+ inodeno = check_filename(filename, blknr);
+ if (inodeno != -1)
+ return inodeno;
+ }
+
+ return -1;
+}
+
+long int ext4fs_get_new_blk_no(void)
+{
+ short i;
+ short status;
+ int remainder;
+ unsigned int bg_idx;
+ static int prev_bg_bitmap_index = -1;
+ unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
+ struct ext_filesystem *fs = get_fs();
+ char *journal_buffer = zalloc(fs->blksz);
+ char *zero_buffer = zalloc(fs->blksz);
+ if (!journal_buffer || !zero_buffer)
+ goto fail;
+ struct ext2_block_group *bgd = (struct ext2_block_group *)fs->gdtable;
+
+ if (fs->first_pass_bbmap == 0) {
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ if (bgd[i].free_blocks) {
+ if (bgd[i].bg_flags & EXT4_BG_BLOCK_UNINIT) {
+ put_ext4(((uint64_t) (bgd[i].block_id *
+ fs->blksz)),
+ zero_buffer, fs->blksz);
+ bgd[i].bg_flags =
+ bgd[i].
+ bg_flags & ~EXT4_BG_BLOCK_UNINIT;
+ memcpy(fs->blk_bmaps[i], zero_buffer,
+ fs->blksz);
+ }
+ fs->curr_blkno =
+ _get_new_blk_no(fs->blk_bmaps[i]);
+ if (fs->curr_blkno == -1)
+ /* if block bitmap is completely fill */
+ continue;
+ fs->curr_blkno = fs->curr_blkno +
+ (i * fs->blksz * 8);
+ fs->first_pass_bbmap++;
+ bgd[i].free_blocks--;
+ fs->sb->free_blocks--;
+ status = ext4fs_devread((lbaint_t)
+ bgd[i].block_id *
+ fs->sect_perblk, 0,
+ fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[i].block_id))
+ goto fail;
+ goto success;
+ } else {
+ debug("no space left on block group %d\n", i);
+ }
+ }
+
+ goto fail;
+ } else {
+restart:
+ fs->curr_blkno++;
+ /* get the blockbitmap index respective to blockno */
+ if (fs->blksz != 1024) {
+ bg_idx = fs->curr_blkno / blk_per_grp;
+ } else {
+ bg_idx = fs->curr_blkno / blk_per_grp;
+ remainder = fs->curr_blkno % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+
+ /*
+ * To skip completely filled block group bitmaps
+ * Optimize the block allocation
+ */
+ if (bg_idx >= fs->no_blkgrp)
+ goto fail;
+
+ if (bgd[bg_idx].free_blocks == 0) {
+ debug("block group %u is full. Skipping\n", bg_idx);
+ fs->curr_blkno = fs->curr_blkno + blk_per_grp;
+ fs->curr_blkno--;
+ goto restart;
+ }
+
+ if (bgd[bg_idx].bg_flags & EXT4_BG_BLOCK_UNINIT) {
+ memset(zero_buffer, '\0', fs->blksz);
+ put_ext4(((uint64_t) (bgd[bg_idx].block_id *
+ fs->blksz)), zero_buffer, fs->blksz);
+ memcpy(fs->blk_bmaps[bg_idx], zero_buffer, fs->blksz);
+ bgd[bg_idx].bg_flags = bgd[bg_idx].bg_flags &
+ ~EXT4_BG_BLOCK_UNINIT;
+ }
+
+ if (ext4fs_set_block_bmap(fs->curr_blkno, fs->blk_bmaps[bg_idx],
+ bg_idx) != 0) {
+ debug("going for restart for the block no %ld %u\n",
+ fs->curr_blkno, bg_idx);
+ goto restart;
+ }
+
+ /* journal backup */
+ if (prev_bg_bitmap_index != bg_idx) {
+ memset(journal_buffer, '\0', fs->blksz);
+ status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id
+ * fs->sect_perblk,
+ 0, fs->blksz, journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[bg_idx].block_id))
+ goto fail;
+
+ prev_bg_bitmap_index = bg_idx;
+ }
+ bgd[bg_idx].free_blocks--;
+ fs->sb->free_blocks--;
+ goto success;
+ }
+success:
+ free(journal_buffer);
+ free(zero_buffer);
+
+ return fs->curr_blkno;
+fail:
+ free(journal_buffer);
+ free(zero_buffer);
+
+ return -1;
+}
+
+int ext4fs_get_new_inode_no(void)
+{
+ short i;
+ short status;
+ unsigned int ibmap_idx;
+ static int prev_inode_bitmap_index = -1;
+ unsigned int inodes_per_grp = ext4fs_root->sblock.inodes_per_group;
+ struct ext_filesystem *fs = get_fs();
+ char *journal_buffer = zalloc(fs->blksz);
+ char *zero_buffer = zalloc(fs->blksz);
+ if (!journal_buffer || !zero_buffer)
+ goto fail;
+ struct ext2_block_group *bgd = (struct ext2_block_group *)fs->gdtable;
+
+ if (fs->first_pass_ibmap == 0) {
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ if (bgd[i].free_inodes) {
+ if (bgd[i].bg_itable_unused !=
+ bgd[i].free_inodes)
+ bgd[i].bg_itable_unused =
+ bgd[i].free_inodes;
+ if (bgd[i].bg_flags & EXT4_BG_INODE_UNINIT) {
+ put_ext4(((uint64_t)
+ (bgd[i].inode_id *
+ fs->blksz)),
+ zero_buffer, fs->blksz);
+ bgd[i].bg_flags = bgd[i].bg_flags &
+ ~EXT4_BG_INODE_UNINIT;
+ memcpy(fs->inode_bmaps[i],
+ zero_buffer, fs->blksz);
+ }
+ fs->curr_inode_no =
+ _get_new_inode_no(fs->inode_bmaps[i]);
+ if (fs->curr_inode_no == -1)
+ /* if block bitmap is completely fill */
+ continue;
+ fs->curr_inode_no = fs->curr_inode_no +
+ (i * inodes_per_grp);
+ fs->first_pass_ibmap++;
+ bgd[i].free_inodes--;
+ bgd[i].bg_itable_unused--;
+ fs->sb->free_inodes--;
+ status = ext4fs_devread((lbaint_t)
+ bgd[i].inode_id *
+ fs->sect_perblk, 0,
+ fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[i].inode_id))
+ goto fail;
+ goto success;
+ } else
+ debug("no inode left on block group %d\n", i);
+ }
+ goto fail;
+ } else {
+restart:
+ fs->curr_inode_no++;
+ /* get the blockbitmap index respective to blockno */
+ ibmap_idx = fs->curr_inode_no / inodes_per_grp;
+ if (bgd[ibmap_idx].bg_flags & EXT4_BG_INODE_UNINIT) {
+ memset(zero_buffer, '\0', fs->blksz);
+ put_ext4(((uint64_t) (bgd[ibmap_idx].inode_id *
+ fs->blksz)), zero_buffer,
+ fs->blksz);
+ bgd[ibmap_idx].bg_flags =
+ bgd[ibmap_idx].bg_flags & ~EXT4_BG_INODE_UNINIT;
+ memcpy(fs->inode_bmaps[ibmap_idx], zero_buffer,
+ fs->blksz);
+ }
+
+ if (ext4fs_set_inode_bmap(fs->curr_inode_no,
+ fs->inode_bmaps[ibmap_idx],
+ ibmap_idx) != 0) {
+ debug("going for restart for the block no %d %u\n",
+ fs->curr_inode_no, ibmap_idx);
+ goto restart;
+ }
+
+ /* journal backup */
+ if (prev_inode_bitmap_index != ibmap_idx) {
+ memset(journal_buffer, '\0', fs->blksz);
+ status = ext4fs_devread((lbaint_t)
+ bgd[ibmap_idx].inode_id
+ * fs->sect_perblk,
+ 0, fs->blksz, journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[ibmap_idx].inode_id))
+ goto fail;
+ prev_inode_bitmap_index = ibmap_idx;
+ }
+ if (bgd[ibmap_idx].bg_itable_unused !=
+ bgd[ibmap_idx].free_inodes)
+ bgd[ibmap_idx].bg_itable_unused =
+ bgd[ibmap_idx].free_inodes;
+ bgd[ibmap_idx].free_inodes--;
+ bgd[ibmap_idx].bg_itable_unused--;
+ fs->sb->free_inodes--;
+ goto success;
+ }
+
+success:
+ free(journal_buffer);
+ free(zero_buffer);
+
+ return fs->curr_inode_no;
+fail:
+ free(journal_buffer);
+ free(zero_buffer);
+
+ return -1;
+
+}
+
+
+static void alloc_single_indirect_block(struct ext2_inode *file_inode,
+ unsigned int *total_remaining_blocks,
+ unsigned int *no_blks_reqd)
+{
+ short i;
+ short status;
+ long int actual_block_no;
+ long int si_blockno;
+ /* si :single indirect */
+ unsigned int *si_buffer = NULL;
+ unsigned int *si_start_addr = NULL;
+ struct ext_filesystem *fs = get_fs();
+
+ if (*total_remaining_blocks != 0) {
+ si_buffer = zalloc(fs->blksz);
+ if (!si_buffer) {
+ printf("No Memory\n");
+ return;
+ }
+ si_start_addr = si_buffer;
+ si_blockno = ext4fs_get_new_blk_no();
+ if (si_blockno == -1) {
+ printf("no block left to assign\n");
+ goto fail;
+ }
+ (*no_blks_reqd)++;
+ debug("SIPB %ld: %u\n", si_blockno, *total_remaining_blocks);
+
+ status = ext4fs_devread((lbaint_t)si_blockno * fs->sect_perblk,
+ 0, fs->blksz, (char *)si_buffer);
+ memset(si_buffer, '\0', fs->blksz);
+ if (status == 0)
+ goto fail;
+
+ for (i = 0; i < (fs->blksz / sizeof(int)); i++) {
+ actual_block_no = ext4fs_get_new_blk_no();
+ if (actual_block_no == -1) {
+ printf("no block left to assign\n");
+ goto fail;
+ }
+ *si_buffer = actual_block_no;
+ debug("SIAB %u: %u\n", *si_buffer,
+ *total_remaining_blocks);
+
+ si_buffer++;
+ (*total_remaining_blocks)--;
+ if (*total_remaining_blocks == 0)
+ break;
+ }
+
+ /* write the block to disk */
+ put_ext4(((uint64_t) (si_blockno * fs->blksz)),
+ si_start_addr, fs->blksz);
+ file_inode->b.blocks.indir_block = si_blockno;
+ }
+fail:
+ free(si_start_addr);
+}
+
+static void alloc_double_indirect_block(struct ext2_inode *file_inode,
+ unsigned int *total_remaining_blocks,
+ unsigned int *no_blks_reqd)
+{
+ short i;
+ short j;
+ short status;
+ long int actual_block_no;
+ /* di:double indirect */
+ long int di_blockno_parent;
+ long int di_blockno_child;
+ unsigned int *di_parent_buffer = NULL;
+ unsigned int *di_child_buff = NULL;
+ unsigned int *di_block_start_addr = NULL;
+ unsigned int *di_child_buff_start = NULL;
+ struct ext_filesystem *fs = get_fs();
+
+ if (*total_remaining_blocks != 0) {
+ /* double indirect parent block connecting to inode */
+ di_blockno_parent = ext4fs_get_new_blk_no();
+ if (di_blockno_parent == -1) {
+ printf("no block left to assign\n");
+ goto fail;
+ }
+ di_parent_buffer = zalloc(fs->blksz);
+ if (!di_parent_buffer)
+ goto fail;
+
+ di_block_start_addr = di_parent_buffer;
+ (*no_blks_reqd)++;
+ debug("DIPB %ld: %u\n", di_blockno_parent,
+ *total_remaining_blocks);
+
+ status = ext4fs_devread((lbaint_t)di_blockno_parent *
+ fs->sect_perblk, 0,
+ fs->blksz, (char *)di_parent_buffer);
+
+ if (!status) {
+ printf("%s: Device read error!\n", __func__);
+ goto fail;
+ }
+ memset(di_parent_buffer, '\0', fs->blksz);
+
+ /*
+ * start:for each double indirect parent
+ * block create one more block
+ */
+ for (i = 0; i < (fs->blksz / sizeof(int)); i++) {
+ di_blockno_child = ext4fs_get_new_blk_no();
+ if (di_blockno_child == -1) {
+ printf("no block left to assign\n");
+ goto fail;
+ }
+ di_child_buff = zalloc(fs->blksz);
+ if (!di_child_buff)
+ goto fail;
+
+ di_child_buff_start = di_child_buff;
+ *di_parent_buffer = di_blockno_child;
+ di_parent_buffer++;
+ (*no_blks_reqd)++;
+ debug("DICB %ld: %u\n", di_blockno_child,
+ *total_remaining_blocks);
+
+ status = ext4fs_devread((lbaint_t)di_blockno_child *
+ fs->sect_perblk, 0,
+ fs->blksz,
+ (char *)di_child_buff);
+
+ if (!status) {
+ printf("%s: Device read error!\n", __func__);
+ goto fail;
+ }
+ memset(di_child_buff, '\0', fs->blksz);
+ /* filling of actual datablocks for each child */
+ for (j = 0; j < (fs->blksz / sizeof(int)); j++) {
+ actual_block_no = ext4fs_get_new_blk_no();
+ if (actual_block_no == -1) {
+ printf("no block left to assign\n");
+ goto fail;
+ }
+ *di_child_buff = actual_block_no;
+ debug("DIAB %ld: %u\n", actual_block_no,
+ *total_remaining_blocks);
+
+ di_child_buff++;
+ (*total_remaining_blocks)--;
+ if (*total_remaining_blocks == 0)
+ break;
+ }
+ /* write the block table */
+ put_ext4(((uint64_t) (di_blockno_child * fs->blksz)),
+ di_child_buff_start, fs->blksz);
+ free(di_child_buff_start);
+ di_child_buff_start = NULL;
+
+ if (*total_remaining_blocks == 0)
+ break;
+ }
+ put_ext4(((uint64_t) (di_blockno_parent * fs->blksz)),
+ di_block_start_addr, fs->blksz);
+ file_inode->b.blocks.double_indir_block = di_blockno_parent;
+ }
+fail:
+ free(di_block_start_addr);
+}
+
+static void alloc_triple_indirect_block(struct ext2_inode *file_inode,
+ unsigned int *total_remaining_blocks,
+ unsigned int *no_blks_reqd)
+{
+ short i;
+ short j;
+ short k;
+ long int actual_block_no;
+ /* ti: Triple Indirect */
+ long int ti_gp_blockno;
+ long int ti_parent_blockno;
+ long int ti_child_blockno;
+ unsigned int *ti_gp_buff = NULL;
+ unsigned int *ti_parent_buff = NULL;
+ unsigned int *ti_child_buff = NULL;
+ unsigned int *ti_gp_buff_start_addr = NULL;
+ unsigned int *ti_pbuff_start_addr = NULL;
+ unsigned int *ti_cbuff_start_addr = NULL;
+ struct ext_filesystem *fs = get_fs();
+ if (*total_remaining_blocks != 0) {
+ /* triple indirect grand parent block connecting to inode */
+ ti_gp_blockno = ext4fs_get_new_blk_no();
+ if (ti_gp_blockno == -1) {
+ printf("no block left to assign\n");
+ goto fail;
+ }
+ ti_gp_buff = zalloc(fs->blksz);
+ if (!ti_gp_buff)
+ goto fail;
+
+ ti_gp_buff_start_addr = ti_gp_buff;
+ (*no_blks_reqd)++;
+ debug("TIGPB %ld: %u\n", ti_gp_blockno,
+ *total_remaining_blocks);
+
+ /* for each 4 byte grand parent entry create one more block */
+ for (i = 0; i < (fs->blksz / sizeof(int)); i++) {
+ ti_parent_blockno = ext4fs_get_new_blk_no();
+ if (ti_parent_blockno == -1) {
+ printf("no block left to assign\n");
+ goto fail;
+ }
+ ti_parent_buff = zalloc(fs->blksz);
+ if (!ti_parent_buff)
+ goto fail;
+
+ ti_pbuff_start_addr = ti_parent_buff;
+ *ti_gp_buff = ti_parent_blockno;
+ ti_gp_buff++;
+ (*no_blks_reqd)++;
+ debug("TIPB %ld: %u\n", ti_parent_blockno,
+ *total_remaining_blocks);
+
+ /* for each 4 byte entry parent create one more block */
+ for (j = 0; j < (fs->blksz / sizeof(int)); j++) {
+ ti_child_blockno = ext4fs_get_new_blk_no();
+ if (ti_child_blockno == -1) {
+ printf("no block left assign\n");
+ goto fail;
+ }
+ ti_child_buff = zalloc(fs->blksz);
+ if (!ti_child_buff)
+ goto fail;
+
+ ti_cbuff_start_addr = ti_child_buff;
+ *ti_parent_buff = ti_child_blockno;
+ ti_parent_buff++;
+ (*no_blks_reqd)++;
+ debug("TICB %ld: %u\n", ti_parent_blockno,
+ *total_remaining_blocks);
+
+ /* fill actual datablocks for each child */
+ for (k = 0; k < (fs->blksz / sizeof(int));
+ k++) {
+ actual_block_no =
+ ext4fs_get_new_blk_no();
+ if (actual_block_no == -1) {
+ printf("no block left\n");
+ goto fail;
+ }
+ *ti_child_buff = actual_block_no;
+ debug("TIAB %ld: %u\n", actual_block_no,
+ *total_remaining_blocks);
+
+ ti_child_buff++;
+ (*total_remaining_blocks)--;
+ if (*total_remaining_blocks == 0)
+ break;
+ }
+ /* write the child block */
+ put_ext4(((uint64_t) (ti_child_blockno *
+ fs->blksz)),
+ ti_cbuff_start_addr, fs->blksz);
+ free(ti_cbuff_start_addr);
+
+ if (*total_remaining_blocks == 0)
+ break;
+ }
+ /* write the parent block */
+ put_ext4(((uint64_t) (ti_parent_blockno * fs->blksz)),
+ ti_pbuff_start_addr, fs->blksz);
+ free(ti_pbuff_start_addr);
+
+ if (*total_remaining_blocks == 0)
+ break;
+ }
+ /* write the grand parent block */
+ put_ext4(((uint64_t) (ti_gp_blockno * fs->blksz)),
+ ti_gp_buff_start_addr, fs->blksz);
+ file_inode->b.blocks.triple_indir_block = ti_gp_blockno;
+ }
+fail:
+ free(ti_gp_buff_start_addr);
+}
+
+void ext4fs_allocate_blocks(struct ext2_inode *file_inode,
+ unsigned int total_remaining_blocks,
+ unsigned int *total_no_of_block)
+{
+ short i;
+ long int direct_blockno;
+ unsigned int no_blks_reqd = 0;
+
+ /* allocation of direct blocks */
+ for (i = 0; i < INDIRECT_BLOCKS; i++) {
+ direct_blockno = ext4fs_get_new_blk_no();
+ if (direct_blockno == -1) {
+ printf("no block left to assign\n");
+ return;
+ }
+ file_inode->b.blocks.dir_blocks[i] = direct_blockno;
+ debug("DB %ld: %u\n", direct_blockno, total_remaining_blocks);
+
+ total_remaining_blocks--;
+ if (total_remaining_blocks == 0)
+ break;
+ }
+
+ alloc_single_indirect_block(file_inode, &total_remaining_blocks,
+ &no_blks_reqd);
+ alloc_double_indirect_block(file_inode, &total_remaining_blocks,
+ &no_blks_reqd);
+ alloc_triple_indirect_block(file_inode, &total_remaining_blocks,
+ &no_blks_reqd);
+ *total_no_of_block += no_blks_reqd;
+}
+
+#endif
+
+static struct ext4_extent_header *ext4fs_get_extent_block
+ (struct ext2_data *data, char *buf,
+ struct ext4_extent_header *ext_block,
+ uint32_t fileblock, int log2_blksz)
+{
+ struct ext4_extent_idx *index;
+ unsigned long long block;
+ struct ext_filesystem *fs = get_fs();
+ int i;
+
+ while (1) {
+ index = (struct ext4_extent_idx *)(ext_block + 1);
+
+ if (le16_to_cpu(ext_block->eh_magic) != EXT4_EXT_MAGIC)
+ return 0;
+
+ if (ext_block->eh_depth == 0)
+ return ext_block;
+ i = -1;
+ do {
+ i++;
+ if (i >= le16_to_cpu(ext_block->eh_entries))
+ break;
+ } while (fileblock > le32_to_cpu(index[i].ei_block));
+
+ if (--i < 0)
+ return 0;
+
+ block = le16_to_cpu(index[i].ei_leaf_hi);
+ block = (block << 32) + le32_to_cpu(index[i].ei_leaf_lo);
+
+ if (ext4fs_devread((lbaint_t)block << log2_blksz, 0, fs->blksz,
+ buf))
+ ext_block = (struct ext4_extent_header *)buf;
+ else
+ return 0;
+ }
+}
+
+static int ext4fs_blockgroup
+ (struct ext2_data *data, int group, struct ext2_block_group *blkgrp)
+{
+ long int blkno;
+ unsigned int blkoff, desc_per_blk;
+ int log2blksz = get_fs()->dev_desc->log2blksz;
+
+ desc_per_blk = EXT2_BLOCK_SIZE(data) / sizeof(struct ext2_block_group);
+
+ blkno = __le32_to_cpu(data->sblock.first_data_block) + 1 +
+ group / desc_per_blk;
+ blkoff = (group % desc_per_blk) * sizeof(struct ext2_block_group);
+
+ debug("ext4fs read %d group descriptor (blkno %ld blkoff %u)\n",
+ group, blkno, blkoff);
+
+ return ext4fs_devread((lbaint_t)blkno <<
+ (LOG2_BLOCK_SIZE(data) - log2blksz),
+ blkoff, sizeof(struct ext2_block_group),
+ (char *)blkgrp);
+}
+
+int ext4fs_read_inode(struct ext2_data *data, int ino, struct ext2_inode *inode)
+{
+ struct ext2_block_group blkgrp;
+ struct ext2_sblock *sblock = &data->sblock;
+ struct ext_filesystem *fs = get_fs();
+ int log2blksz = get_fs()->dev_desc->log2blksz;
+ int inodes_per_block, status;
+ long int blkno;
+ unsigned int blkoff;
+
+ /* It is easier to calculate if the first inode is 0. */
+ ino--;
+ status = ext4fs_blockgroup(data, ino / __le32_to_cpu
+ (sblock->inodes_per_group), &blkgrp);
+ if (status == 0)
+ return 0;
+
+ inodes_per_block = EXT2_BLOCK_SIZE(data) / fs->inodesz;
+ blkno = __le32_to_cpu(blkgrp.inode_table_id) +
+ (ino % __le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block;
+ blkoff = (ino % inodes_per_block) * fs->inodesz;
+ /* Read the inode. */
+ status = ext4fs_devread((lbaint_t)blkno << (LOG2_BLOCK_SIZE(data) -
+ log2blksz), blkoff,
+ sizeof(struct ext2_inode), (char *)inode);
+ if (status == 0)
+ return 0;
+
+ return 1;
+}
+
+long int read_allocated_block(struct ext2_inode *inode, int fileblock)
+{
+ long int blknr;
+ int blksz;
+ int log2_blksz;
+ int status;
+ long int rblock;
+ long int perblock_parent;
+ long int perblock_child;
+ unsigned long long start;
+ /* get the blocksize of the filesystem */
+ blksz = EXT2_BLOCK_SIZE(ext4fs_root);
+ log2_blksz = LOG2_BLOCK_SIZE(ext4fs_root)
+ - get_fs()->dev_desc->log2blksz;
+
+ if (le32_to_cpu(inode->flags) & EXT4_EXTENTS_FL) {
+ char *buf = zalloc(blksz);
+ if (!buf)
+ return -ENOMEM;
+ struct ext4_extent_header *ext_block;
+ struct ext4_extent *extent;
+ int i = -1;
+ ext_block =
+ ext4fs_get_extent_block(ext4fs_root, buf,
+ (struct ext4_extent_header *)
+ inode->b.blocks.dir_blocks,
+ fileblock, log2_blksz);
+ if (!ext_block) {
+ printf("invalid extent block\n");
+ free(buf);
+ return -EINVAL;
+ }
+
+ extent = (struct ext4_extent *)(ext_block + 1);
+
+ do {
+ i++;
+ if (i >= le16_to_cpu(ext_block->eh_entries))
+ break;
+ } while (fileblock >= le32_to_cpu(extent[i].ee_block));
+ if (--i >= 0) {
+ fileblock -= le32_to_cpu(extent[i].ee_block);
+ if (fileblock >= le16_to_cpu(extent[i].ee_len)) {
+ free(buf);
+ return 0;
+ }
+
+ start = le16_to_cpu(extent[i].ee_start_hi);
+ start = (start << 32) +
+ le32_to_cpu(extent[i].ee_start_lo);
+ free(buf);
+ return fileblock + start;
+ }
+
+ printf("Extent Error\n");
+ free(buf);
+ return -1;
+ }
+
+ /* Direct blocks. */
+ if (fileblock < INDIRECT_BLOCKS)
+ blknr = __le32_to_cpu(inode->b.blocks.dir_blocks[fileblock]);
+
+ /* Indirect. */
+ else if (fileblock < (INDIRECT_BLOCKS + (blksz / 4))) {
+ if (ext4fs_indir1_block == NULL) {
+ ext4fs_indir1_block = zalloc(blksz);
+ if (ext4fs_indir1_block == NULL) {
+ printf("** SI ext2fs read block (indir 1)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir1_size = blksz;
+ ext4fs_indir1_blkno = -1;
+ }
+ if (blksz != ext4fs_indir1_size) {
+ free(ext4fs_indir1_block);
+ ext4fs_indir1_block = NULL;
+ ext4fs_indir1_size = 0;
+ ext4fs_indir1_blkno = -1;
+ ext4fs_indir1_block = zalloc(blksz);
+ if (ext4fs_indir1_block == NULL) {
+ printf("** SI ext2fs read block (indir 1):"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir1_size = blksz;
+ }
+ if ((__le32_to_cpu(inode->b.blocks.indir_block) <<
+ log2_blksz) != ext4fs_indir1_blkno) {
+ status =
+ ext4fs_devread((lbaint_t)__le32_to_cpu
+ (inode->b.blocks.
+ indir_block) << log2_blksz, 0,
+ blksz, (char *)ext4fs_indir1_block);
+ if (status == 0) {
+ printf("** SI ext2fs read block (indir 1)"
+ "failed. **\n");
+ return 0;
+ }
+ ext4fs_indir1_blkno =
+ __le32_to_cpu(inode->b.blocks.
+ indir_block) << log2_blksz;
+ }
+ blknr = __le32_to_cpu(ext4fs_indir1_block
+ [fileblock - INDIRECT_BLOCKS]);
+ }
+ /* Double indirect. */
+ else if (fileblock < (INDIRECT_BLOCKS + (blksz / 4 *
+ (blksz / 4 + 1)))) {
+
+ long int perblock = blksz / 4;
+ long int rblock = fileblock - (INDIRECT_BLOCKS + blksz / 4);
+
+ if (ext4fs_indir1_block == NULL) {
+ ext4fs_indir1_block = zalloc(blksz);
+ if (ext4fs_indir1_block == NULL) {
+ printf("** DI ext2fs read block (indir 2 1)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir1_size = blksz;
+ ext4fs_indir1_blkno = -1;
+ }
+ if (blksz != ext4fs_indir1_size) {
+ free(ext4fs_indir1_block);
+ ext4fs_indir1_block = NULL;
+ ext4fs_indir1_size = 0;
+ ext4fs_indir1_blkno = -1;
+ ext4fs_indir1_block = zalloc(blksz);
+ if (ext4fs_indir1_block == NULL) {
+ printf("** DI ext2fs read block (indir 2 1)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir1_size = blksz;
+ }
+ if ((__le32_to_cpu(inode->b.blocks.double_indir_block) <<
+ log2_blksz) != ext4fs_indir1_blkno) {
+ status =
+ ext4fs_devread((lbaint_t)__le32_to_cpu
+ (inode->b.blocks.
+ double_indir_block) << log2_blksz,
+ 0, blksz,
+ (char *)ext4fs_indir1_block);
+ if (status == 0) {
+ printf("** DI ext2fs read block (indir 2 1)"
+ "failed. **\n");
+ return -1;
+ }
+ ext4fs_indir1_blkno =
+ __le32_to_cpu(inode->b.blocks.double_indir_block) <<
+ log2_blksz;
+ }
+
+ if (ext4fs_indir2_block == NULL) {
+ ext4fs_indir2_block = zalloc(blksz);
+ if (ext4fs_indir2_block == NULL) {
+ printf("** DI ext2fs read block (indir 2 2)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir2_size = blksz;
+ ext4fs_indir2_blkno = -1;
+ }
+ if (blksz != ext4fs_indir2_size) {
+ free(ext4fs_indir2_block);
+ ext4fs_indir2_block = NULL;
+ ext4fs_indir2_size = 0;
+ ext4fs_indir2_blkno = -1;
+ ext4fs_indir2_block = zalloc(blksz);
+ if (ext4fs_indir2_block == NULL) {
+ printf("** DI ext2fs read block (indir 2 2)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir2_size = blksz;
+ }
+ if ((__le32_to_cpu(ext4fs_indir1_block[rblock / perblock]) <<
+ log2_blksz) != ext4fs_indir2_blkno) {
+ status = ext4fs_devread((lbaint_t)__le32_to_cpu
+ (ext4fs_indir1_block
+ [rblock /
+ perblock]) << log2_blksz, 0,
+ blksz,
+ (char *)ext4fs_indir2_block);
+ if (status == 0) {
+ printf("** DI ext2fs read block (indir 2 2)"
+ "failed. **\n");
+ return -1;
+ }
+ ext4fs_indir2_blkno =
+ __le32_to_cpu(ext4fs_indir1_block[rblock
+ /
+ perblock]) <<
+ log2_blksz;
+ }
+ blknr = __le32_to_cpu(ext4fs_indir2_block[rblock % perblock]);
+ }
+ /* Tripple indirect. */
+ else {
+ rblock = fileblock - (INDIRECT_BLOCKS + blksz / 4 +
+ (blksz / 4 * blksz / 4));
+ perblock_child = blksz / 4;
+ perblock_parent = ((blksz / 4) * (blksz / 4));
+
+ if (ext4fs_indir1_block == NULL) {
+ ext4fs_indir1_block = zalloc(blksz);
+ if (ext4fs_indir1_block == NULL) {
+ printf("** TI ext2fs read block (indir 2 1)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir1_size = blksz;
+ ext4fs_indir1_blkno = -1;
+ }
+ if (blksz != ext4fs_indir1_size) {
+ free(ext4fs_indir1_block);
+ ext4fs_indir1_block = NULL;
+ ext4fs_indir1_size = 0;
+ ext4fs_indir1_blkno = -1;
+ ext4fs_indir1_block = zalloc(blksz);
+ if (ext4fs_indir1_block == NULL) {
+ printf("** TI ext2fs read block (indir 2 1)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir1_size = blksz;
+ }
+ if ((__le32_to_cpu(inode->b.blocks.triple_indir_block) <<
+ log2_blksz) != ext4fs_indir1_blkno) {
+ status = ext4fs_devread
+ ((lbaint_t)
+ __le32_to_cpu(inode->b.blocks.triple_indir_block)
+ << log2_blksz, 0, blksz,
+ (char *)ext4fs_indir1_block);
+ if (status == 0) {
+ printf("** TI ext2fs read block (indir 2 1)"
+ "failed. **\n");
+ return -1;
+ }
+ ext4fs_indir1_blkno =
+ __le32_to_cpu(inode->b.blocks.triple_indir_block) <<
+ log2_blksz;
+ }
+
+ if (ext4fs_indir2_block == NULL) {
+ ext4fs_indir2_block = zalloc(blksz);
+ if (ext4fs_indir2_block == NULL) {
+ printf("** TI ext2fs read block (indir 2 2)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir2_size = blksz;
+ ext4fs_indir2_blkno = -1;
+ }
+ if (blksz != ext4fs_indir2_size) {
+ free(ext4fs_indir2_block);
+ ext4fs_indir2_block = NULL;
+ ext4fs_indir2_size = 0;
+ ext4fs_indir2_blkno = -1;
+ ext4fs_indir2_block = zalloc(blksz);
+ if (ext4fs_indir2_block == NULL) {
+ printf("** TI ext2fs read block (indir 2 2)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir2_size = blksz;
+ }
+ if ((__le32_to_cpu(ext4fs_indir1_block[rblock /
+ perblock_parent]) <<
+ log2_blksz)
+ != ext4fs_indir2_blkno) {
+ status = ext4fs_devread((lbaint_t)__le32_to_cpu
+ (ext4fs_indir1_block
+ [rblock /
+ perblock_parent]) <<
+ log2_blksz, 0, blksz,
+ (char *)ext4fs_indir2_block);
+ if (status == 0) {
+ printf("** TI ext2fs read block (indir 2 2)"
+ "failed. **\n");
+ return -1;
+ }
+ ext4fs_indir2_blkno =
+ __le32_to_cpu(ext4fs_indir1_block[rblock /
+ perblock_parent])
+ << log2_blksz;
+ }
+
+ if (ext4fs_indir3_block == NULL) {
+ ext4fs_indir3_block = zalloc(blksz);
+ if (ext4fs_indir3_block == NULL) {
+ printf("** TI ext2fs read block (indir 2 2)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir3_size = blksz;
+ ext4fs_indir3_blkno = -1;
+ }
+ if (blksz != ext4fs_indir3_size) {
+ free(ext4fs_indir3_block);
+ ext4fs_indir3_block = NULL;
+ ext4fs_indir3_size = 0;
+ ext4fs_indir3_blkno = -1;
+ ext4fs_indir3_block = zalloc(blksz);
+ if (ext4fs_indir3_block == NULL) {
+ printf("** TI ext2fs read block (indir 2 2)"
+ "malloc failed. **\n");
+ return -1;
+ }
+ ext4fs_indir3_size = blksz;
+ }
+ if ((__le32_to_cpu(ext4fs_indir2_block[rblock
+ /
+ perblock_child]) <<
+ log2_blksz) != ext4fs_indir3_blkno) {
+ status =
+ ext4fs_devread((lbaint_t)__le32_to_cpu
+ (ext4fs_indir2_block
+ [(rblock / perblock_child)
+ % (blksz / 4)]) << log2_blksz, 0,
+ blksz, (char *)ext4fs_indir3_block);
+ if (status == 0) {
+ printf("** TI ext2fs read block (indir 2 2)"
+ "failed. **\n");
+ return -1;
+ }
+ ext4fs_indir3_blkno =
+ __le32_to_cpu(ext4fs_indir2_block[(rblock /
+ perblock_child) %
+ (blksz /
+ 4)]) <<
+ log2_blksz;
+ }
+
+ blknr = __le32_to_cpu(ext4fs_indir3_block
+ [rblock % perblock_child]);
+ }
+ debug("read_allocated_block %ld\n", blknr);
+
+ return blknr;
+}
+
+void ext4fs_close(void)
+{
+ if ((ext4fs_file != NULL) && (ext4fs_root != NULL)) {
+ ext4fs_free_node(ext4fs_file, &ext4fs_root->diropen);
+ ext4fs_file = NULL;
+ }
+ if (ext4fs_root != NULL) {
+ free(ext4fs_root);
+ ext4fs_root = NULL;
+ }
+ if (ext4fs_indir1_block != NULL) {
+ free(ext4fs_indir1_block);
+ ext4fs_indir1_block = NULL;
+ ext4fs_indir1_size = 0;
+ ext4fs_indir1_blkno = -1;
+ }
+ if (ext4fs_indir2_block != NULL) {
+ free(ext4fs_indir2_block);
+ ext4fs_indir2_block = NULL;
+ ext4fs_indir2_size = 0;
+ ext4fs_indir2_blkno = -1;
+ }
+ if (ext4fs_indir3_block != NULL) {
+ free(ext4fs_indir3_block);
+ ext4fs_indir3_block = NULL;
+ ext4fs_indir3_size = 0;
+ ext4fs_indir3_blkno = -1;
+ }
+}
+
+int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
+ struct ext2fs_node **fnode, int *ftype)
+{
+ unsigned int fpos = 0;
+ int status;
+ struct ext2fs_node *diro = (struct ext2fs_node *) dir;
+
+#ifdef DEBUG
+ if (name != NULL)
+ printf("Iterate dir %s\n", name);
+#endif /* of DEBUG */
+ if (!diro->inode_read) {
+ status = ext4fs_read_inode(diro->data, diro->ino, &diro->inode);
+ if (status == 0)
+ return 0;
+ }
+ /* Search the file. */
+ while (fpos < __le32_to_cpu(diro->inode.size)) {
+ struct ext2_dirent dirent;
+
+ status = ext4fs_read_file(diro, fpos,
+ sizeof(struct ext2_dirent),
+ (char *) &dirent);
+ if (status < 1)
+ return 0;
+
+ if (dirent.namelen != 0) {
+ char filename[dirent.namelen + 1];
+ struct ext2fs_node *fdiro;
+ int type = FILETYPE_UNKNOWN;
+
+ status = ext4fs_read_file(diro,
+ fpos +
+ sizeof(struct ext2_dirent),
+ dirent.namelen, filename);
+ if (status < 1)
+ return 0;
+
+ fdiro = zalloc(sizeof(struct ext2fs_node));
+ if (!fdiro)
+ return 0;
+
+ fdiro->data = diro->data;
+ fdiro->ino = __le32_to_cpu(dirent.inode);
+
+ filename[dirent.namelen] = '\0';
+
+ if (dirent.filetype != FILETYPE_UNKNOWN) {
+ fdiro->inode_read = 0;
+
+ if (dirent.filetype == FILETYPE_DIRECTORY)
+ type = FILETYPE_DIRECTORY;
+ else if (dirent.filetype == FILETYPE_SYMLINK)
+ type = FILETYPE_SYMLINK;
+ else if (dirent.filetype == FILETYPE_REG)
+ type = FILETYPE_REG;
+ } else {
+ status = ext4fs_read_inode(diro->data,
+ __le32_to_cpu
+ (dirent.inode),
+ &fdiro->inode);
+ if (status == 0) {
+ free(fdiro);
+ return 0;
+ }
+ fdiro->inode_read = 1;
+
+ if ((__le16_to_cpu(fdiro->inode.mode) &
+ FILETYPE_INO_MASK) ==
+ FILETYPE_INO_DIRECTORY) {
+ type = FILETYPE_DIRECTORY;
+ } else if ((__le16_to_cpu(fdiro->inode.mode)
+ & FILETYPE_INO_MASK) ==
+ FILETYPE_INO_SYMLINK) {
+ type = FILETYPE_SYMLINK;
+ } else if ((__le16_to_cpu(fdiro->inode.mode)
+ & FILETYPE_INO_MASK) ==
+ FILETYPE_INO_REG) {
+ type = FILETYPE_REG;
+ }
+ }
+#ifdef DEBUG
+ printf("iterate >%s<\n", filename);
+#endif /* of DEBUG */
+ if ((name != NULL) && (fnode != NULL)
+ && (ftype != NULL)) {
+ if (strcmp(filename, name) == 0) {
+ *ftype = type;
+ *fnode = fdiro;
+ return 1;
+ }
+ } else {
+ if (fdiro->inode_read == 0) {
+ status = ext4fs_read_inode(diro->data,
+ __le32_to_cpu(
+ dirent.inode),
+ &fdiro->inode);
+ if (status == 0) {
+ free(fdiro);
+ return 0;
+ }
+ fdiro->inode_read = 1;
+ }
+ switch (type) {
+ case FILETYPE_DIRECTORY:
+ printf("<DIR> ");
+ break;
+ case FILETYPE_SYMLINK:
+ printf("<SYM> ");
+ break;
+ case FILETYPE_REG:
+ printf(" ");
+ break;
+ default:
+ printf("< ? > ");
+ break;
+ }
+ printf("%10d %s\n",
+ __le32_to_cpu(fdiro->inode.size),
+ filename);
+ }
+ free(fdiro);
+ }
+ fpos += __le16_to_cpu(dirent.direntlen);
+ }
+ return 0;
+}
+
+static char *ext4fs_read_symlink(struct ext2fs_node *node)
+{
+ char *symlink;
+ struct ext2fs_node *diro = node;
+ int status;
+
+ if (!diro->inode_read) {
+ status = ext4fs_read_inode(diro->data, diro->ino, &diro->inode);
+ if (status == 0)
+ return 0;
+ }
+ symlink = zalloc(__le32_to_cpu(diro->inode.size) + 1);
+ if (!symlink)
+ return 0;
+
+ if (__le32_to_cpu(diro->inode.size) <= 60) {
+ strncpy(symlink, diro->inode.b.symlink,
+ __le32_to_cpu(diro->inode.size));
+ } else {
+ status = ext4fs_read_file(diro, 0,
+ __le32_to_cpu(diro->inode.size),
+ symlink);
+ if (status == 0) {
+ free(symlink);
+ return 0;
+ }
+ }
+ symlink[__le32_to_cpu(diro->inode.size)] = '\0';
+ return symlink;
+}
+
+static int ext4fs_find_file1(const char *currpath,
+ struct ext2fs_node *currroot,
+ struct ext2fs_node **currfound, int *foundtype)
+{
+ char fpath[strlen(currpath) + 1];
+ char *name = fpath;
+ char *next;
+ int status;
+ int type = FILETYPE_DIRECTORY;
+ struct ext2fs_node *currnode = currroot;
+ struct ext2fs_node *oldnode = currroot;
+
+ strncpy(fpath, currpath, strlen(currpath) + 1);
+
+ /* Remove all leading slashes. */
+ while (*name == '/')
+ name++;
+
+ if (!*name) {
+ *currfound = currnode;
+ return 1;
+ }
+
+ for (;;) {
+ int found;
+
+ /* Extract the actual part from the pathname. */
+ next = strchr(name, '/');
+ if (next) {
+ /* Remove all leading slashes. */
+ while (*next == '/')
+ *(next++) = '\0';
+ }
+
+ if (type != FILETYPE_DIRECTORY) {
+ ext4fs_free_node(currnode, currroot);
+ return 0;
+ }
+
+ oldnode = currnode;
+
+ /* Iterate over the directory. */
+ found = ext4fs_iterate_dir(currnode, name, &currnode, &type);
+ if (found == 0)
+ return 0;
+
+ if (found == -1)
+ break;
+
+ /* Read in the symlink and follow it. */
+ if (type == FILETYPE_SYMLINK) {
+ char *symlink;
+
+ /* Test if the symlink does not loop. */
+ if (++symlinknest == 8) {
+ ext4fs_free_node(currnode, currroot);
+ ext4fs_free_node(oldnode, currroot);
+ return 0;
+ }
+
+ symlink = ext4fs_read_symlink(currnode);
+ ext4fs_free_node(currnode, currroot);
+
+ if (!symlink) {
+ ext4fs_free_node(oldnode, currroot);
+ return 0;
+ }
+
+ debug("Got symlink >%s<\n", symlink);
+
+ if (symlink[0] == '/') {
+ ext4fs_free_node(oldnode, currroot);
+ oldnode = &ext4fs_root->diropen;
+ }
+
+ /* Lookup the node the symlink points to. */
+ status = ext4fs_find_file1(symlink, oldnode,
+ &currnode, &type);
+
+ free(symlink);
+
+ if (status == 0) {
+ ext4fs_free_node(oldnode, currroot);
+ return 0;
+ }
+ }
+
+ ext4fs_free_node(oldnode, currroot);
+
+ /* Found the node! */
+ if (!next || *next == '\0') {
+ *currfound = currnode;
+ *foundtype = type;
+ return 1;
+ }
+ name = next;
+ }
+ return -1;
+}
+
+int ext4fs_find_file(const char *path, struct ext2fs_node *rootnode,
+ struct ext2fs_node **foundnode, int expecttype)
+{
+ int status;
+ int foundtype = FILETYPE_DIRECTORY;
+
+ symlinknest = 0;
+ if (!path)
+ return 0;
+
+ status = ext4fs_find_file1(path, rootnode, foundnode, &foundtype);
+ if (status == 0)
+ return 0;
+
+ /* Check if the node that was found was of the expected type. */
+ if ((expecttype == FILETYPE_REG) && (foundtype != expecttype))
+ return 0;
+ else if ((expecttype == FILETYPE_DIRECTORY)
+ && (foundtype != expecttype))
+ return 0;
+
+ return 1;
+}
+
+int ext4fs_open(const char *filename)
+{
+ struct ext2fs_node *fdiro = NULL;
+ int status;
+ int len;
+
+ if (ext4fs_root == NULL)
+ return -1;
+
+ ext4fs_file = NULL;
+ status = ext4fs_find_file(filename, &ext4fs_root->diropen, &fdiro,
+ FILETYPE_REG);
+ if (status == 0)
+ goto fail;
+
+ if (!fdiro->inode_read) {
+ status = ext4fs_read_inode(fdiro->data, fdiro->ino,
+ &fdiro->inode);
+ if (status == 0)
+ goto fail;
+ }
+ len = __le32_to_cpu(fdiro->inode.size);
+ ext4fs_file = fdiro;
+
+ return len;
+fail:
+ ext4fs_free_node(fdiro, &ext4fs_root->diropen);
+
+ return -1;
+}
+
+int ext4fs_mount(unsigned part_length)
+{
+ struct ext2_data *data;
+ int status;
+ struct ext_filesystem *fs = get_fs();
+ data = zalloc(SUPERBLOCK_SIZE);
+ if (!data)
+ return 0;
+
+ /* Read the superblock. */
+ status = ext4_read_superblock((char *)&data->sblock);
+
+ if (status == 0)
+ goto fail;
+
+ /* Make sure this is an ext2 filesystem. */
+ if (__le16_to_cpu(data->sblock.magic) != EXT2_MAGIC)
+ goto fail;
+
+ if (__le32_to_cpu(data->sblock.revision_level == 0))
+ fs->inodesz = 128;
+ else
+ fs->inodesz = __le16_to_cpu(data->sblock.inode_size);
+
+ debug("EXT2 rev %d, inode_size %d\n",
+ __le32_to_cpu(data->sblock.revision_level), fs->inodesz);
+
+ data->diropen.data = data;
+ data->diropen.ino = 2;
+ data->diropen.inode_read = 1;
+ data->inode = &data->diropen.inode;
+
+ status = ext4fs_read_inode(data, 2, data->inode);
+ if (status == 0)
+ goto fail;
+
+ ext4fs_root = data;
+
+ return 1;
+fail:
+ printf("Failed to mount ext2 filesystem...\n");
+ free(data);
+ ext4fs_root = NULL;
+
+ return 0;
+}
diff --git a/fs/ext4/ext4_common.h b/fs/ext4/ext4_common.h
new file mode 100644
index 0000000000..5fa1719f2e
--- /dev/null
+++ b/fs/ext4/ext4_common.h
@@ -0,0 +1,78 @@
+/*
+ * (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>
+ *
+ * ext4ls and ext4load : based on 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.
+ *
+ * ext4write : Based on generic ext4 protocol.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __EXT4_COMMON__
+#define __EXT4_COMMON__
+#include <ext_common.h>
+#include <ext4fs.h>
+#include <malloc.h>
+#include <asm/errno.h>
+#if defined(CONFIG_EXT4_WRITE)
+#include "ext4_journal.h"
+#include "crc16.h"
+#endif
+
+#define YES 1
+#define NO 0
+#define RECOVER 1
+#define SCAN 0
+
+#define S_IFLNK 0120000 /* symbolic link */
+#define BLOCK_NO_ONE 1
+#define SUPERBLOCK_START (2 * 512)
+#define SUPERBLOCK_SIZE 1024
+#define F_FILE 1
+
+static inline void *zalloc(size_t size)
+{
+ void *p = memalign(ARCH_DMA_MINALIGN, size);
+ memset(p, 0, size);
+ return p;
+}
+
+int ext4fs_read_inode(struct ext2_data *data, int ino,
+ struct ext2_inode *inode);
+int ext4fs_read_file(struct ext2fs_node *node, int pos,
+ unsigned int len, char *buf);
+int ext4fs_find_file(const char *path, struct ext2fs_node *rootnode,
+ struct ext2fs_node **foundnode, int expecttype);
+int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
+ struct ext2fs_node **fnode, int *ftype);
+
+#if defined(CONFIG_EXT4_WRITE)
+uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n);
+int ext4fs_checksum_update(unsigned int i);
+int ext4fs_get_parent_inode_num(const char *dirname, char *dname, int flags);
+void ext4fs_update_parent_dentry(char *filename, int *p_ino, int file_type);
+long int ext4fs_get_new_blk_no(void);
+int ext4fs_get_new_inode_no(void);
+void ext4fs_reset_block_bmap(long int blockno, unsigned char *buffer,
+ int index);
+int ext4fs_set_block_bmap(long int blockno, unsigned char *buffer, int index);
+int ext4fs_set_inode_bmap(int inode_no, unsigned char *buffer, int index);
+void ext4fs_reset_inode_bmap(int inode_no, unsigned char *buffer, int index);
+int ext4fs_iget(int inode_no, struct ext2_inode *inode);
+void ext4fs_allocate_blocks(struct ext2_inode *file_inode,
+ unsigned int total_remaining_blocks,
+ unsigned int *total_no_of_block);
+void put_ext4(uint64_t off, void *buf, uint32_t size);
+#endif
+#endif
diff --git a/fs/ext4/ext4_journal.c b/fs/ext4/ext4_journal.c
new file mode 100644
index 0000000000..d4a46ed8b6
--- /dev/null
+++ b/fs/ext4/ext4_journal.c
@@ -0,0 +1,653 @@
+/*
+ * (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>
+ *
+ * Journal data structures and headers for Journaling feature of ext4
+ * have been referred from JBD2 (Journaling Block device 2)
+ * implementation in Linux Kernel.
+ * Written by Stephen C. Tweedie <sct@redhat.com>
+ *
+ * Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <ext4fs.h>
+#include <malloc.h>
+#include <ext_common.h>
+#include "ext4_common.h"
+
+static struct revoke_blk_list *revk_blk_list;
+static struct revoke_blk_list *prev_node;
+static int first_node = true;
+
+int gindex;
+int gd_index;
+int jrnl_blk_idx;
+struct journal_log *journal_ptr[MAX_JOURNAL_ENTRIES];
+struct dirty_blocks *dirty_block_ptr[MAX_JOURNAL_ENTRIES];
+
+int ext4fs_init_journal(void)
+{
+ int i;
+ char *temp = NULL;
+ struct ext_filesystem *fs = get_fs();
+
+ /* init globals */
+ revk_blk_list = NULL;
+ prev_node = NULL;
+ gindex = 0;
+ gd_index = 0;
+ jrnl_blk_idx = 1;
+
+ for (i = 0; i < MAX_JOURNAL_ENTRIES; i++) {
+ journal_ptr[i] = zalloc(sizeof(struct journal_log));
+ if (!journal_ptr[i])
+ goto fail;
+ dirty_block_ptr[i] = zalloc(sizeof(struct dirty_blocks));
+ if (!dirty_block_ptr[i])
+ goto fail;
+ journal_ptr[i]->buf = NULL;
+ journal_ptr[i]->blknr = -1;
+
+ dirty_block_ptr[i]->buf = NULL;
+ dirty_block_ptr[i]->blknr = -1;
+ }
+
+ if (fs->blksz == 4096) {
+ temp = zalloc(fs->blksz);
+ if (!temp)
+ goto fail;
+ journal_ptr[gindex]->buf = zalloc(fs->blksz);
+ if (!journal_ptr[gindex]->buf)
+ goto fail;
+ ext4fs_devread(0, 0, fs->blksz, temp);
+ memcpy(temp + SUPERBLOCK_SIZE, fs->sb, SUPERBLOCK_SIZE);
+ memcpy(journal_ptr[gindex]->buf, temp, fs->blksz);
+ journal_ptr[gindex++]->blknr = 0;
+ free(temp);
+ } else {
+ journal_ptr[gindex]->buf = zalloc(fs->blksz);
+ if (!journal_ptr[gindex]->buf)
+ goto fail;
+ memcpy(journal_ptr[gindex]->buf, fs->sb, SUPERBLOCK_SIZE);
+ journal_ptr[gindex++]->blknr = 1;
+ }
+
+ /* Check the file system state using journal super block */
+ if (ext4fs_check_journal_state(SCAN))
+ goto fail;
+ /* Check the file system state using journal super block */
+ if (ext4fs_check_journal_state(RECOVER))
+ goto fail;
+
+ return 0;
+fail:
+ return -1;
+}
+
+void ext4fs_dump_metadata(void)
+{
+ struct ext_filesystem *fs = get_fs();
+ int i;
+ for (i = 0; i < MAX_JOURNAL_ENTRIES; i++) {
+ if (dirty_block_ptr[i]->blknr == -1)
+ break;
+ put_ext4((uint64_t) ((uint64_t)dirty_block_ptr[i]->blknr *
+ (uint64_t)fs->blksz), dirty_block_ptr[i]->buf,
+ fs->blksz);
+ }
+}
+
+void ext4fs_free_journal(void)
+{
+ int i;
+ for (i = 0; i < MAX_JOURNAL_ENTRIES; i++) {
+ if (dirty_block_ptr[i]->blknr == -1)
+ break;
+ if (dirty_block_ptr[i]->buf)
+ free(dirty_block_ptr[i]->buf);
+ }
+
+ for (i = 0; i < MAX_JOURNAL_ENTRIES; i++) {
+ if (journal_ptr[i]->blknr == -1)
+ break;
+ if (journal_ptr[i]->buf)
+ free(journal_ptr[i]->buf);
+ }
+
+ for (i = 0; i < MAX_JOURNAL_ENTRIES; i++) {
+ if (journal_ptr[i])
+ free(journal_ptr[i]);
+ if (dirty_block_ptr[i])
+ free(dirty_block_ptr[i]);
+ }
+ gindex = 0;
+ gd_index = 0;
+ jrnl_blk_idx = 1;
+}
+
+int ext4fs_log_gdt(char *gd_table)
+{
+ struct ext_filesystem *fs = get_fs();
+ short i;
+ long int var = fs->gdtable_blkno;
+ for (i = 0; i < fs->no_blk_pergdt; i++) {
+ journal_ptr[gindex]->buf = zalloc(fs->blksz);
+ if (!journal_ptr[gindex]->buf)
+ return -ENOMEM;
+ memcpy(journal_ptr[gindex]->buf, gd_table, fs->blksz);
+ gd_table += fs->blksz;
+ journal_ptr[gindex++]->blknr = var++;
+ }
+
+ return 0;
+}
+
+/*
+ * This function stores the backup copy of meta data in RAM
+ * journal_buffer -- Buffer containing meta data
+ * blknr -- Block number on disk of the meta data buffer
+ */
+int ext4fs_log_journal(char *journal_buffer, long int blknr)
+{
+ struct ext_filesystem *fs = get_fs();
+ short i;
+
+ if (!journal_buffer) {
+ printf("Invalid input arguments %s\n", __func__);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < MAX_JOURNAL_ENTRIES; i++) {
+ if (journal_ptr[i]->blknr == -1)
+ break;
+ if (journal_ptr[i]->blknr == blknr)
+ return 0;
+ }
+
+ journal_ptr[gindex]->buf = zalloc(fs->blksz);
+ if (!journal_ptr[gindex]->buf)
+ return -ENOMEM;
+
+ memcpy(journal_ptr[gindex]->buf, journal_buffer, fs->blksz);
+ journal_ptr[gindex++]->blknr = blknr;
+
+ return 0;
+}
+
+/*
+ * This function stores the modified meta data in RAM
+ * metadata_buffer -- Buffer containing meta data
+ * blknr -- Block number on disk of the meta data buffer
+ */
+int ext4fs_put_metadata(char *metadata_buffer, long int blknr)
+{
+ struct ext_filesystem *fs = get_fs();
+ if (!metadata_buffer) {
+ printf("Invalid input arguments %s\n", __func__);
+ return -EINVAL;
+ }
+ dirty_block_ptr[gd_index]->buf = zalloc(fs->blksz);
+ if (!dirty_block_ptr[gd_index]->buf)
+ return -ENOMEM;
+ memcpy(dirty_block_ptr[gd_index]->buf, metadata_buffer, fs->blksz);
+ dirty_block_ptr[gd_index++]->blknr = blknr;
+
+ return 0;
+}
+
+void print_revoke_blks(char *revk_blk)
+{
+ int offset;
+ int max;
+ long int blocknr;
+ struct journal_revoke_header_t *header;
+
+ if (revk_blk == NULL)
+ return;
+
+ header = (struct journal_revoke_header_t *) revk_blk;
+ offset = sizeof(struct journal_revoke_header_t);
+ max = be32_to_cpu(header->r_count);
+ printf("total bytes %d\n", max);
+
+ while (offset < max) {
+ blocknr = be32_to_cpu(*((long int *)(revk_blk + offset)));
+ printf("revoke blknr is %ld\n", blocknr);
+ offset += 4;
+ }
+}
+
+static struct revoke_blk_list *_get_node(void)
+{
+ struct revoke_blk_list *tmp_node;
+ tmp_node = zalloc(sizeof(struct revoke_blk_list));
+ if (tmp_node == NULL)
+ return NULL;
+ tmp_node->content = NULL;
+ tmp_node->next = NULL;
+
+ return tmp_node;
+}
+
+void ext4fs_push_revoke_blk(char *buffer)
+{
+ struct revoke_blk_list *node = NULL;
+ struct ext_filesystem *fs = get_fs();
+ if (buffer == NULL) {
+ printf("buffer ptr is NULL\n");
+ return;
+ }
+ node = _get_node();
+ if (!node) {
+ printf("_get_node: malloc failed\n");
+ return;
+ }
+
+ node->content = zalloc(fs->blksz);
+ if (node->content == NULL)
+ return;
+ memcpy(node->content, buffer, fs->blksz);
+
+ if (first_node == true) {
+ revk_blk_list = node;
+ prev_node = node;
+ first_node = false;
+ } else {
+ prev_node->next = node;
+ prev_node = node;
+ }
+}
+
+void ext4fs_free_revoke_blks(void)
+{
+ struct revoke_blk_list *tmp_node = revk_blk_list;
+ struct revoke_blk_list *next_node = NULL;
+
+ while (tmp_node != NULL) {
+ if (tmp_node->content)
+ free(tmp_node->content);
+ tmp_node = tmp_node->next;
+ }
+
+ tmp_node = revk_blk_list;
+ while (tmp_node != NULL) {
+ next_node = tmp_node->next;
+ free(tmp_node);
+ tmp_node = next_node;
+ }
+
+ revk_blk_list = NULL;
+ prev_node = NULL;
+ first_node = true;
+}
+
+int check_blknr_for_revoke(long int blknr, int sequence_no)
+{
+ struct journal_revoke_header_t *header;
+ int offset;
+ int max;
+ long int blocknr;
+ char *revk_blk;
+ struct revoke_blk_list *tmp_revk_node = revk_blk_list;
+ while (tmp_revk_node != NULL) {
+ revk_blk = tmp_revk_node->content;
+
+ header = (struct journal_revoke_header_t *) revk_blk;
+ if (sequence_no < be32_to_cpu(header->r_header.h_sequence)) {
+ offset = sizeof(struct journal_revoke_header_t);
+ max = be32_to_cpu(header->r_count);
+
+ while (offset < max) {
+ blocknr = be32_to_cpu(*((long int *)
+ (revk_blk + offset)));
+ if (blocknr == blknr)
+ goto found;
+ offset += 4;
+ }
+ }
+ tmp_revk_node = tmp_revk_node->next;
+ }
+
+ return -1;
+
+found:
+ return 0;
+}
+
+/*
+ * This function parses the journal blocks and replays the
+ * suceessful transactions. A transaction is successfull
+ * if commit block is found for a descriptor block
+ * The tags in descriptor block contain the disk block
+ * numbers of the metadata to be replayed
+ */
+void recover_transaction(int prev_desc_logical_no)
+{
+ struct ext2_inode inode_journal;
+ struct ext_filesystem *fs = get_fs();
+ struct journal_header_t *jdb;
+ long int blknr;
+ char *p_jdb;
+ int ofs, flags;
+ int i;
+ struct ext3_journal_block_tag *tag;
+ char *temp_buff = zalloc(fs->blksz);
+ char *metadata_buff = zalloc(fs->blksz);
+ if (!temp_buff || !metadata_buff)
+ goto fail;
+ i = prev_desc_logical_no;
+ ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO,
+ (struct ext2_inode *)&inode_journal);
+ blknr = read_allocated_block((struct ext2_inode *)
+ &inode_journal, i);
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
+ p_jdb = (char *)temp_buff;
+ jdb = (struct journal_header_t *) temp_buff;
+ ofs = sizeof(struct journal_header_t);
+
+ do {
+ tag = (struct ext3_journal_block_tag *)&p_jdb[ofs];
+ ofs += sizeof(struct ext3_journal_block_tag);
+
+ if (ofs > fs->blksz)
+ break;
+
+ flags = be32_to_cpu(tag->flags);
+ if (!(flags & EXT3_JOURNAL_FLAG_SAME_UUID))
+ ofs += 16;
+
+ i++;
+ debug("\t\ttag %u\n", be32_to_cpu(tag->block));
+ if (revk_blk_list != NULL) {
+ if (check_blknr_for_revoke(be32_to_cpu(tag->block),
+ be32_to_cpu(jdb->h_sequence)) == 0)
+ continue;
+ }
+ blknr = read_allocated_block(&inode_journal, i);
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
+ fs->blksz, metadata_buff);
+ put_ext4((uint64_t)(be32_to_cpu(tag->block) * fs->blksz),
+ metadata_buff, (uint32_t) fs->blksz);
+ } while (!(flags & EXT3_JOURNAL_FLAG_LAST_TAG));
+fail:
+ free(temp_buff);
+ free(metadata_buff);
+}
+
+void print_jrnl_status(int recovery_flag)
+{
+ if (recovery_flag == RECOVER)
+ printf("Journal Recovery Completed\n");
+ else
+ printf("Journal Scan Completed\n");
+}
+
+int ext4fs_check_journal_state(int recovery_flag)
+{
+ int i;
+ int DB_FOUND = NO;
+ long int blknr;
+ int transaction_state = TRANSACTION_COMPLETE;
+ int prev_desc_logical_no = 0;
+ int curr_desc_logical_no = 0;
+ int ofs, flags;
+ struct ext2_inode inode_journal;
+ struct journal_superblock_t *jsb = NULL;
+ struct journal_header_t *jdb = NULL;
+ char *p_jdb = NULL;
+ struct ext3_journal_block_tag *tag = NULL;
+ char *temp_buff = NULL;
+ char *temp_buff1 = NULL;
+ struct ext_filesystem *fs = get_fs();
+
+ temp_buff = zalloc(fs->blksz);
+ if (!temp_buff)
+ return -ENOMEM;
+ temp_buff1 = zalloc(fs->blksz);
+ if (!temp_buff1) {
+ free(temp_buff);
+ return -ENOMEM;
+ }
+
+ ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
+ blknr = read_allocated_block(&inode_journal, EXT2_JOURNAL_SUPERBLOCK);
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
+ jsb = (struct journal_superblock_t *) temp_buff;
+
+ if (fs->sb->feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
+ if (recovery_flag == RECOVER)
+ printf("Recovery required\n");
+ } else {
+ if (recovery_flag == RECOVER)
+ printf("File System is consistent\n");
+ goto end;
+ }
+
+ if (be32_to_cpu(jsb->s_start) == 0)
+ goto end;
+
+ if (!(jsb->s_feature_compat &
+ cpu_to_be32(JBD2_FEATURE_COMPAT_CHECKSUM)))
+ jsb->s_feature_compat |=
+ cpu_to_be32(JBD2_FEATURE_COMPAT_CHECKSUM);
+
+ i = be32_to_cpu(jsb->s_first);
+ while (1) {
+ blknr = read_allocated_block(&inode_journal, i);
+ memset(temp_buff1, '\0', fs->blksz);
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk,
+ 0, fs->blksz, temp_buff1);
+ jdb = (struct journal_header_t *) temp_buff1;
+
+ if (be32_to_cpu(jdb->h_blocktype) ==
+ EXT3_JOURNAL_DESCRIPTOR_BLOCK) {
+ if (be32_to_cpu(jdb->h_sequence) !=
+ be32_to_cpu(jsb->s_sequence)) {
+ print_jrnl_status(recovery_flag);
+ break;
+ }
+
+ curr_desc_logical_no = i;
+ if (transaction_state == TRANSACTION_COMPLETE)
+ transaction_state = TRANSACTION_RUNNING;
+ else
+ return -1;
+ p_jdb = (char *)temp_buff1;
+ ofs = sizeof(struct journal_header_t);
+ do {
+ tag = (struct ext3_journal_block_tag *)
+ &p_jdb[ofs];
+ ofs += sizeof(struct ext3_journal_block_tag);
+ if (ofs > fs->blksz)
+ break;
+ flags = be32_to_cpu(tag->flags);
+ if (!(flags & EXT3_JOURNAL_FLAG_SAME_UUID))
+ ofs += 16;
+ i++;
+ debug("\t\ttag %u\n", be32_to_cpu(tag->block));
+ } while (!(flags & EXT3_JOURNAL_FLAG_LAST_TAG));
+ i++;
+ DB_FOUND = YES;
+ } else if (be32_to_cpu(jdb->h_blocktype) ==
+ EXT3_JOURNAL_COMMIT_BLOCK) {
+ if (be32_to_cpu(jdb->h_sequence) !=
+ be32_to_cpu(jsb->s_sequence)) {
+ print_jrnl_status(recovery_flag);
+ break;
+ }
+
+ if (transaction_state == TRANSACTION_RUNNING ||
+ (DB_FOUND == NO)) {
+ transaction_state = TRANSACTION_COMPLETE;
+ i++;
+ jsb->s_sequence =
+ cpu_to_be32(be32_to_cpu(
+ jsb->s_sequence) + 1);
+ }
+ prev_desc_logical_no = curr_desc_logical_no;
+ if ((recovery_flag == RECOVER) && (DB_FOUND == YES))
+ recover_transaction(prev_desc_logical_no);
+
+ DB_FOUND = NO;
+ } else if (be32_to_cpu(jdb->h_blocktype) ==
+ EXT3_JOURNAL_REVOKE_BLOCK) {
+ if (be32_to_cpu(jdb->h_sequence) !=
+ be32_to_cpu(jsb->s_sequence)) {
+ print_jrnl_status(recovery_flag);
+ break;
+ }
+ if (recovery_flag == SCAN)
+ ext4fs_push_revoke_blk((char *)jdb);
+ i++;
+ } else {
+ debug("Else Case\n");
+ if (be32_to_cpu(jdb->h_sequence) !=
+ be32_to_cpu(jsb->s_sequence)) {
+ print_jrnl_status(recovery_flag);
+ break;
+ }
+ }
+ }
+
+end:
+ if (recovery_flag == RECOVER) {
+ jsb->s_start = cpu_to_be32(1);
+ jsb->s_sequence = cpu_to_be32(be32_to_cpu(jsb->s_sequence) + 1);
+ /* get the superblock */
+ ext4_read_superblock((char *)fs->sb);
+ fs->sb->feature_incompat |= EXT3_FEATURE_INCOMPAT_RECOVER;
+
+ /* Update the super block */
+ put_ext4((uint64_t) (SUPERBLOCK_SIZE),
+ (struct ext2_sblock *)fs->sb,
+ (uint32_t) SUPERBLOCK_SIZE);
+ ext4_read_superblock((char *)fs->sb);
+
+ blknr = read_allocated_block(&inode_journal,
+ EXT2_JOURNAL_SUPERBLOCK);
+ put_ext4((uint64_t) (blknr * fs->blksz),
+ (struct journal_superblock_t *)temp_buff,
+ (uint32_t) fs->blksz);
+ ext4fs_free_revoke_blks();
+ }
+ free(temp_buff);
+ free(temp_buff1);
+
+ return 0;
+}
+
+static void update_descriptor_block(long int blknr)
+{
+ int i;
+ long int jsb_blknr;
+ struct journal_header_t jdb;
+ struct ext3_journal_block_tag tag;
+ struct ext2_inode inode_journal;
+ struct journal_superblock_t *jsb = NULL;
+ char *buf = NULL;
+ char *temp = NULL;
+ struct ext_filesystem *fs = get_fs();
+ char *temp_buff = zalloc(fs->blksz);
+ if (!temp_buff)
+ return;
+
+ ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
+ jsb_blknr = read_allocated_block(&inode_journal,
+ EXT2_JOURNAL_SUPERBLOCK);
+ ext4fs_devread((lbaint_t)jsb_blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
+ jsb = (struct journal_superblock_t *) temp_buff;
+
+ jdb.h_blocktype = cpu_to_be32(EXT3_JOURNAL_DESCRIPTOR_BLOCK);
+ jdb.h_magic = cpu_to_be32(EXT3_JOURNAL_MAGIC_NUMBER);
+ jdb.h_sequence = jsb->s_sequence;
+ buf = zalloc(fs->blksz);
+ if (!buf) {
+ free(temp_buff);
+ return;
+ }
+ temp = buf;
+ memcpy(buf, &jdb, sizeof(struct journal_header_t));
+ temp += sizeof(struct journal_header_t);
+
+ for (i = 0; i < MAX_JOURNAL_ENTRIES; i++) {
+ if (journal_ptr[i]->blknr == -1)
+ break;
+
+ tag.block = cpu_to_be32(journal_ptr[i]->blknr);
+ tag.flags = cpu_to_be32(EXT3_JOURNAL_FLAG_SAME_UUID);
+ memcpy(temp, &tag, sizeof(struct ext3_journal_block_tag));
+ temp = temp + sizeof(struct ext3_journal_block_tag);
+ }
+
+ tag.block = cpu_to_be32(journal_ptr[--i]->blknr);
+ tag.flags = cpu_to_be32(EXT3_JOURNAL_FLAG_LAST_TAG);
+ memcpy(temp - sizeof(struct ext3_journal_block_tag), &tag,
+ sizeof(struct ext3_journal_block_tag));
+ put_ext4((uint64_t) (blknr * fs->blksz), buf, (uint32_t) fs->blksz);
+
+ free(temp_buff);
+ free(buf);
+}
+
+static void update_commit_block(long int blknr)
+{
+ struct journal_header_t jdb;
+ struct ext_filesystem *fs = get_fs();
+ char *buf = NULL;
+ struct ext2_inode inode_journal;
+ struct journal_superblock_t *jsb;
+ long int jsb_blknr;
+ char *temp_buff = zalloc(fs->blksz);
+ if (!temp_buff)
+ return;
+
+ ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO,
+ &inode_journal);
+ jsb_blknr = read_allocated_block(&inode_journal,
+ EXT2_JOURNAL_SUPERBLOCK);
+ ext4fs_devread((lbaint_t)jsb_blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
+ jsb = (struct journal_superblock_t *) temp_buff;
+
+ jdb.h_blocktype = cpu_to_be32(EXT3_JOURNAL_COMMIT_BLOCK);
+ jdb.h_magic = cpu_to_be32(EXT3_JOURNAL_MAGIC_NUMBER);
+ jdb.h_sequence = jsb->s_sequence;
+ buf = zalloc(fs->blksz);
+ if (!buf) {
+ free(temp_buff);
+ return;
+ }
+ memcpy(buf, &jdb, sizeof(struct journal_header_t));
+ put_ext4((uint64_t) (blknr * fs->blksz), buf, (uint32_t) fs->blksz);
+
+ free(temp_buff);
+ free(buf);
+}
+
+void ext4fs_update_journal(void)
+{
+ struct ext2_inode inode_journal;
+ struct ext_filesystem *fs = get_fs();
+ long int blknr;
+ int i;
+ ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO, &inode_journal);
+ blknr = read_allocated_block(&inode_journal, jrnl_blk_idx++);
+ update_descriptor_block(blknr);
+ for (i = 0; i < MAX_JOURNAL_ENTRIES; i++) {
+ if (journal_ptr[i]->blknr == -1)
+ break;
+ blknr = read_allocated_block(&inode_journal, jrnl_blk_idx++);
+ put_ext4((uint64_t) ((uint64_t)blknr * (uint64_t)fs->blksz),
+ journal_ptr[i]->buf, fs->blksz);
+ }
+ blknr = read_allocated_block(&inode_journal, jrnl_blk_idx++);
+ update_commit_block(blknr);
+ printf("update journal finished\n");
+}
diff --git a/fs/ext4/ext4_journal.h b/fs/ext4/ext4_journal.h
new file mode 100644
index 0000000000..d926094bec
--- /dev/null
+++ b/fs/ext4/ext4_journal.h
@@ -0,0 +1,125 @@
+/*
+ * (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>
+ *
+ * Journal data structures and headers for Journaling feature of ext4
+ * have been referred from JBD2 (Journaling Block device 2)
+ * implementation in Linux Kernel.
+ *
+ * Written by Stephen C. Tweedie <sct@redhat.com>
+ *
+ * Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __EXT4_JRNL__
+#define __EXT4_JRNL__
+
+#define EXT2_JOURNAL_INO 8 /* Journal inode */
+#define EXT2_JOURNAL_SUPERBLOCK 0 /* Journal Superblock number */
+
+#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001
+#define EXT3_JOURNAL_MAGIC_NUMBER 0xc03b3998U
+#define TRANSACTION_RUNNING 1
+#define TRANSACTION_COMPLETE 0
+#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
+#define EXT3_JOURNAL_DESCRIPTOR_BLOCK 1
+#define EXT3_JOURNAL_COMMIT_BLOCK 2
+#define EXT3_JOURNAL_SUPERBLOCK_V1 3
+#define EXT3_JOURNAL_SUPERBLOCK_V2 4
+#define EXT3_JOURNAL_REVOKE_BLOCK 5
+#define EXT3_JOURNAL_FLAG_ESCAPE 1
+#define EXT3_JOURNAL_FLAG_SAME_UUID 2
+#define EXT3_JOURNAL_FLAG_DELETED 4
+#define EXT3_JOURNAL_FLAG_LAST_TAG 8
+
+/* Maximum entries in 1 journal transaction */
+#define MAX_JOURNAL_ENTRIES 100
+struct journal_log {
+ char *buf;
+ int blknr;
+};
+
+struct dirty_blocks {
+ char *buf;
+ int blknr;
+};
+
+/* Standard header for all descriptor blocks: */
+struct journal_header_t {
+ __u32 h_magic;
+ __u32 h_blocktype;
+ __u32 h_sequence;
+};
+
+/* The journal superblock. All fields are in big-endian byte order. */
+struct journal_superblock_t {
+ /* 0x0000 */
+ struct journal_header_t s_header;
+
+ /* Static information describing the journal */
+ __u32 s_blocksize; /* journal device blocksize */
+ __u32 s_maxlen; /* total blocks in journal file */
+ __u32 s_first; /* first block of log information */
+
+ /* Dynamic information describing the current state of the log */
+ __u32 s_sequence; /* first commit ID expected in log */
+ __u32 s_start; /* blocknr of start of log */
+
+ /* Error value, as set by journal_abort(). */
+ __s32 s_errno;
+
+ /* Remaining fields are only valid in a version-2 superblock */
+ __u32 s_feature_compat; /* compatible feature set */
+ __u32 s_feature_incompat; /* incompatible feature set */
+ __u32 s_feature_ro_compat; /* readonly-compatible feature set */
+ /* 0x0030 */
+ __u8 s_uuid[16]; /* 128-bit uuid for journal */
+
+ /* 0x0040 */
+ __u32 s_nr_users; /* Nr of filesystems sharing log */
+
+ __u32 s_dynsuper; /* Blocknr of dynamic superblock copy */
+
+ /* 0x0048 */
+ __u32 s_max_transaction; /* Limit of journal blocks per trans. */
+ __u32 s_max_trans_data; /* Limit of data blocks per trans. */
+
+ /* 0x0050 */
+ __u32 s_padding[44];
+
+ /* 0x0100 */
+ __u8 s_users[16 * 48]; /* ids of all fs'es sharing the log */
+ /* 0x0400 */
+} ;
+
+struct ext3_journal_block_tag {
+ uint32_t block;
+ uint32_t flags;
+};
+
+struct journal_revoke_header_t {
+ struct journal_header_t r_header;
+ int r_count; /* Count of bytes used in the block */
+};
+
+struct revoke_blk_list {
+ char *content; /* revoke block itself */
+ struct revoke_blk_list *next;
+};
+
+extern struct ext2_data *ext4fs_root;
+
+int ext4fs_init_journal(void);
+int ext4fs_log_gdt(char *gd_table);
+int ext4fs_check_journal_state(int recovery_flag);
+int ext4fs_log_journal(char *journal_buffer, long int blknr);
+int ext4fs_put_metadata(char *metadata_buffer, long int blknr);
+void ext4fs_update_journal(void);
+void ext4fs_dump_metadata(void);
+void ext4fs_push_revoke_blk(char *buffer);
+void ext4fs_free_journal(void);
+void ext4fs_free_revoke_blks(void);
+#endif
diff --git a/fs/ext4/ext4_write.c b/fs/ext4/ext4_write.c
new file mode 100644
index 0000000000..1e1924c806
--- /dev/null
+++ b/fs/ext4/ext4_write.c
@@ -0,0 +1,994 @@
+/*
+ * (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>
+ *
+ * ext4ls and ext4load : Based on ext2 ls and load support in Uboot.
+ * Ext4 read optimization taken from Open-Moko
+ * Qi bootloader
+ *
+ * (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.
+ *
+ * ext4write : Based on generic ext4 protocol.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+
+#include <common.h>
+#include <linux/stat.h>
+#include <div64.h>
+#include "ext4_common.h"
+
+static void ext4fs_update(void)
+{
+ short i;
+ ext4fs_update_journal();
+ struct ext_filesystem *fs = get_fs();
+
+ /* update super block */
+ put_ext4((uint64_t)(SUPERBLOCK_SIZE),
+ (struct ext2_sblock *)fs->sb, (uint32_t)SUPERBLOCK_SIZE);
+
+ /* update block groups */
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ fs->bgd[i].bg_checksum = ext4fs_checksum_update(i);
+ put_ext4((uint64_t)(fs->bgd[i].block_id * fs->blksz),
+ fs->blk_bmaps[i], fs->blksz);
+ }
+
+ /* update inode table groups */
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ put_ext4((uint64_t) (fs->bgd[i].inode_id * fs->blksz),
+ fs->inode_bmaps[i], fs->blksz);
+ }
+
+ /* update the block group descriptor table */
+ put_ext4((uint64_t)(fs->gdtable_blkno * fs->blksz),
+ (struct ext2_block_group *)fs->gdtable,
+ (fs->blksz * fs->no_blk_pergdt));
+
+ ext4fs_dump_metadata();
+
+ gindex = 0;
+ gd_index = 0;
+}
+
+int ext4fs_get_bgdtable(void)
+{
+ int status;
+ int grp_desc_size;
+ struct ext_filesystem *fs = get_fs();
+ grp_desc_size = sizeof(struct ext2_block_group);
+ fs->no_blk_pergdt = (fs->no_blkgrp * grp_desc_size) / fs->blksz;
+ if ((fs->no_blkgrp * grp_desc_size) % fs->blksz)
+ fs->no_blk_pergdt++;
+
+ /* allocate memory for gdtable */
+ fs->gdtable = zalloc(fs->blksz * fs->no_blk_pergdt);
+ if (!fs->gdtable)
+ return -ENOMEM;
+ /* read the group descriptor table */
+ status = ext4fs_devread((lbaint_t)fs->gdtable_blkno * fs->sect_perblk,
+ 0, fs->blksz * fs->no_blk_pergdt, fs->gdtable);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_gdt(fs->gdtable)) {
+ printf("Error in ext4fs_log_gdt\n");
+ return -1;
+ }
+
+ return 0;
+fail:
+ free(fs->gdtable);
+ fs->gdtable = NULL;
+
+ return -1;
+}
+
+static void delete_single_indirect_block(struct ext2_inode *inode)
+{
+ struct ext2_block_group *bgd = NULL;
+ static int prev_bg_bmap_idx = -1;
+ long int blknr;
+ int remainder;
+ int bg_idx;
+ int status;
+ unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
+ struct ext_filesystem *fs = get_fs();
+ char *journal_buffer = zalloc(fs->blksz);
+ if (!journal_buffer) {
+ printf("No memory\n");
+ return;
+ }
+ /* get block group descriptor table */
+ bgd = (struct ext2_block_group *)fs->gdtable;
+
+ /* deleting the single indirect block associated with inode */
+ if (inode->b.blocks.indir_block != 0) {
+ debug("SIPB releasing %u\n", inode->b.blocks.indir_block);
+ blknr = inode->b.blocks.indir_block;
+ if (fs->blksz != 1024) {
+ bg_idx = blknr / blk_per_grp;
+ } else {
+ bg_idx = blknr / blk_per_grp;
+ remainder = blknr % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+ ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx);
+ bgd[bg_idx].free_blocks++;
+ fs->sb->free_blocks++;
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ status =
+ ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
+ fs->sect_perblk, 0, fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal
+ (journal_buffer, bgd[bg_idx].block_id))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
+ }
+ }
+fail:
+ free(journal_buffer);
+}
+
+static void delete_double_indirect_block(struct ext2_inode *inode)
+{
+ int i;
+ short status;
+ static int prev_bg_bmap_idx = -1;
+ long int blknr;
+ int remainder;
+ int bg_idx;
+ unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
+ unsigned int *di_buffer = NULL;
+ unsigned int *DIB_start_addr = NULL;
+ struct ext2_block_group *bgd = NULL;
+ struct ext_filesystem *fs = get_fs();
+ char *journal_buffer = zalloc(fs->blksz);
+ if (!journal_buffer) {
+ printf("No memory\n");
+ return;
+ }
+ /* get the block group descriptor table */
+ bgd = (struct ext2_block_group *)fs->gdtable;
+
+ if (inode->b.blocks.double_indir_block != 0) {
+ di_buffer = zalloc(fs->blksz);
+ if (!di_buffer) {
+ printf("No memory\n");
+ return;
+ }
+ DIB_start_addr = (unsigned int *)di_buffer;
+ blknr = inode->b.blocks.double_indir_block;
+ status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
+ fs->blksz, (char *)di_buffer);
+ for (i = 0; i < fs->blksz / sizeof(int); i++) {
+ if (*di_buffer == 0)
+ break;
+
+ debug("DICB releasing %u\n", *di_buffer);
+ if (fs->blksz != 1024) {
+ bg_idx = (*di_buffer) / blk_per_grp;
+ } else {
+ bg_idx = (*di_buffer) / blk_per_grp;
+ remainder = (*di_buffer) % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+ ext4fs_reset_block_bmap(*di_buffer,
+ fs->blk_bmaps[bg_idx], bg_idx);
+ di_buffer++;
+ bgd[bg_idx].free_blocks++;
+ fs->sb->free_blocks++;
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ status = ext4fs_devread((lbaint_t)
+ bgd[bg_idx].block_id
+ * fs->sect_perblk, 0,
+ fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[bg_idx].block_id))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
+ }
+ }
+
+ /* removing the parent double indirect block */
+ blknr = inode->b.blocks.double_indir_block;
+ if (fs->blksz != 1024) {
+ bg_idx = blknr / blk_per_grp;
+ } else {
+ bg_idx = blknr / blk_per_grp;
+ remainder = blknr % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+ ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx);
+ bgd[bg_idx].free_blocks++;
+ fs->sb->free_blocks++;
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ memset(journal_buffer, '\0', fs->blksz);
+ status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
+ fs->sect_perblk, 0, fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[bg_idx].block_id))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
+ }
+ debug("DIPB releasing %ld\n", blknr);
+ }
+fail:
+ free(DIB_start_addr);
+ free(journal_buffer);
+}
+
+static void delete_triple_indirect_block(struct ext2_inode *inode)
+{
+ int i, j;
+ short status;
+ static int prev_bg_bmap_idx = -1;
+ long int blknr;
+ int remainder;
+ int bg_idx;
+ unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
+ unsigned int *tigp_buffer = NULL;
+ unsigned int *tib_start_addr = NULL;
+ unsigned int *tip_buffer = NULL;
+ unsigned int *tipb_start_addr = NULL;
+ struct ext2_block_group *bgd = NULL;
+ struct ext_filesystem *fs = get_fs();
+ char *journal_buffer = zalloc(fs->blksz);
+ if (!journal_buffer) {
+ printf("No memory\n");
+ return;
+ }
+ /* get block group descriptor table */
+ bgd = (struct ext2_block_group *)fs->gdtable;
+
+ if (inode->b.blocks.triple_indir_block != 0) {
+ tigp_buffer = zalloc(fs->blksz);
+ if (!tigp_buffer) {
+ printf("No memory\n");
+ return;
+ }
+ tib_start_addr = (unsigned int *)tigp_buffer;
+ blknr = inode->b.blocks.triple_indir_block;
+ status = ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0,
+ fs->blksz, (char *)tigp_buffer);
+ for (i = 0; i < fs->blksz / sizeof(int); i++) {
+ if (*tigp_buffer == 0)
+ break;
+ debug("tigp buffer releasing %u\n", *tigp_buffer);
+
+ tip_buffer = zalloc(fs->blksz);
+ if (!tip_buffer)
+ goto fail;
+ tipb_start_addr = (unsigned int *)tip_buffer;
+ status = ext4fs_devread((lbaint_t)(*tigp_buffer) *
+ fs->sect_perblk, 0, fs->blksz,
+ (char *)tip_buffer);
+ for (j = 0; j < fs->blksz / sizeof(int); j++) {
+ if (*tip_buffer == 0)
+ break;
+ if (fs->blksz != 1024) {
+ bg_idx = (*tip_buffer) / blk_per_grp;
+ } else {
+ bg_idx = (*tip_buffer) / blk_per_grp;
+
+ remainder = (*tip_buffer) % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+
+ ext4fs_reset_block_bmap(*tip_buffer,
+ fs->blk_bmaps[bg_idx],
+ bg_idx);
+
+ tip_buffer++;
+ bgd[bg_idx].free_blocks++;
+ fs->sb->free_blocks++;
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ status =
+ ext4fs_devread(
+ (lbaint_t)
+ bgd[bg_idx].block_id *
+ fs->sect_perblk, 0,
+ fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[bg_idx].
+ block_id))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
+ }
+ }
+ free(tipb_start_addr);
+ tipb_start_addr = NULL;
+
+ /*
+ * removing the grand parent blocks
+ * which is connected to inode
+ */
+ if (fs->blksz != 1024) {
+ bg_idx = (*tigp_buffer) / blk_per_grp;
+ } else {
+ bg_idx = (*tigp_buffer) / blk_per_grp;
+
+ remainder = (*tigp_buffer) % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+ ext4fs_reset_block_bmap(*tigp_buffer,
+ fs->blk_bmaps[bg_idx], bg_idx);
+
+ tigp_buffer++;
+ bgd[bg_idx].free_blocks++;
+ fs->sb->free_blocks++;
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ memset(journal_buffer, '\0', fs->blksz);
+ status =
+ ext4fs_devread((lbaint_t)
+ bgd[bg_idx].block_id *
+ fs->sect_perblk, 0,
+ fs->blksz, journal_buffer);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[bg_idx].block_id))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
+ }
+ }
+
+ /* removing the grand parent triple indirect block */
+ blknr = inode->b.blocks.triple_indir_block;
+ if (fs->blksz != 1024) {
+ bg_idx = blknr / blk_per_grp;
+ } else {
+ bg_idx = blknr / blk_per_grp;
+ remainder = blknr % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+ ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx], bg_idx);
+ bgd[bg_idx].free_blocks++;
+ fs->sb->free_blocks++;
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ memset(journal_buffer, '\0', fs->blksz);
+ status = ext4fs_devread((lbaint_t)bgd[bg_idx].block_id *
+ fs->sect_perblk, 0, fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[bg_idx].block_id))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
+ }
+ debug("tigp buffer itself releasing %ld\n", blknr);
+ }
+fail:
+ free(tib_start_addr);
+ free(tipb_start_addr);
+ free(journal_buffer);
+}
+
+static int ext4fs_delete_file(int inodeno)
+{
+ struct ext2_inode inode;
+ short status;
+ int i;
+ int remainder;
+ long int blknr;
+ int bg_idx;
+ int ibmap_idx;
+ char *read_buffer = NULL;
+ char *start_block_address = NULL;
+ unsigned int no_blocks;
+
+ static int prev_bg_bmap_idx = -1;
+ unsigned int inodes_per_block;
+ long int blkno;
+ unsigned int blkoff;
+ unsigned int blk_per_grp = ext4fs_root->sblock.blocks_per_group;
+ unsigned int inode_per_grp = ext4fs_root->sblock.inodes_per_group;
+ struct ext2_inode *inode_buffer = NULL;
+ struct ext2_block_group *bgd = NULL;
+ struct ext_filesystem *fs = get_fs();
+ char *journal_buffer = zalloc(fs->blksz);
+ if (!journal_buffer)
+ return -ENOMEM;
+ /* get the block group descriptor table */
+ bgd = (struct ext2_block_group *)fs->gdtable;
+ status = ext4fs_read_inode(ext4fs_root, inodeno, &inode);
+ if (status == 0)
+ goto fail;
+
+ /* read the block no allocated to a file */
+ no_blocks = inode.size / fs->blksz;
+ if (inode.size % fs->blksz)
+ no_blocks++;
+
+ if (le32_to_cpu(inode.flags) & EXT4_EXTENTS_FL) {
+ struct ext2fs_node *node_inode =
+ zalloc(sizeof(struct ext2fs_node));
+ if (!node_inode)
+ goto fail;
+ node_inode->data = ext4fs_root;
+ node_inode->ino = inodeno;
+ node_inode->inode_read = 0;
+ memcpy(&(node_inode->inode), &inode, sizeof(struct ext2_inode));
+
+ for (i = 0; i < no_blocks; i++) {
+ blknr = read_allocated_block(&(node_inode->inode), i);
+ if (fs->blksz != 1024) {
+ bg_idx = blknr / blk_per_grp;
+ } else {
+ bg_idx = blknr / blk_per_grp;
+ remainder = blknr % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+ ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx],
+ bg_idx);
+ debug("EXT4_EXTENTS Block releasing %ld: %d\n",
+ blknr, bg_idx);
+
+ bgd[bg_idx].free_blocks++;
+ fs->sb->free_blocks++;
+
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ status =
+ ext4fs_devread((lbaint_t)
+ bgd[bg_idx].block_id *
+ fs->sect_perblk, 0,
+ fs->blksz, journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[bg_idx].block_id))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
+ }
+ }
+ if (node_inode) {
+ free(node_inode);
+ node_inode = NULL;
+ }
+ } else {
+
+ delete_single_indirect_block(&inode);
+ delete_double_indirect_block(&inode);
+ delete_triple_indirect_block(&inode);
+
+ /* read the block no allocated to a file */
+ no_blocks = inode.size / fs->blksz;
+ if (inode.size % fs->blksz)
+ no_blocks++;
+ for (i = 0; i < no_blocks; i++) {
+ blknr = read_allocated_block(&inode, i);
+ if (fs->blksz != 1024) {
+ bg_idx = blknr / blk_per_grp;
+ } else {
+ bg_idx = blknr / blk_per_grp;
+ remainder = blknr % blk_per_grp;
+ if (!remainder)
+ bg_idx--;
+ }
+ ext4fs_reset_block_bmap(blknr, fs->blk_bmaps[bg_idx],
+ bg_idx);
+ debug("ActualB releasing %ld: %d\n", blknr, bg_idx);
+
+ bgd[bg_idx].free_blocks++;
+ fs->sb->free_blocks++;
+ /* journal backup */
+ if (prev_bg_bmap_idx != bg_idx) {
+ memset(journal_buffer, '\0', fs->blksz);
+ status = ext4fs_devread((lbaint_t)
+ bgd[bg_idx].block_id
+ * fs->sect_perblk,
+ 0, fs->blksz,
+ journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal(journal_buffer,
+ bgd[bg_idx].block_id))
+ goto fail;
+ prev_bg_bmap_idx = bg_idx;
+ }
+ }
+ }
+
+ /* from the inode no to blockno */
+ inodes_per_block = fs->blksz / fs->inodesz;
+ ibmap_idx = inodeno / inode_per_grp;
+
+ /* get the block no */
+ inodeno--;
+ blkno = __le32_to_cpu(bgd[ibmap_idx].inode_table_id) +
+ (inodeno % __le32_to_cpu(inode_per_grp)) / inodes_per_block;
+
+ /* get the offset of the inode */
+ blkoff = ((inodeno) % inodes_per_block) * fs->inodesz;
+
+ /* read the block no containing the inode */
+ read_buffer = zalloc(fs->blksz);
+ if (!read_buffer)
+ goto fail;
+ start_block_address = read_buffer;
+ status = ext4fs_devread((lbaint_t)blkno * fs->sect_perblk,
+ 0, fs->blksz, read_buffer);
+ if (status == 0)
+ goto fail;
+
+ if (ext4fs_log_journal(read_buffer, blkno))
+ goto fail;
+
+ read_buffer = read_buffer + blkoff;
+ inode_buffer = (struct ext2_inode *)read_buffer;
+ memset(inode_buffer, '\0', sizeof(struct ext2_inode));
+
+ /* write the inode to original position in inode table */
+ if (ext4fs_put_metadata(start_block_address, blkno))
+ goto fail;
+
+ /* update the respective inode bitmaps */
+ inodeno++;
+ ext4fs_reset_inode_bmap(inodeno, fs->inode_bmaps[ibmap_idx], ibmap_idx);
+ bgd[ibmap_idx].free_inodes++;
+ fs->sb->free_inodes++;
+ /* journal backup */
+ memset(journal_buffer, '\0', fs->blksz);
+ status = ext4fs_devread((lbaint_t)bgd[ibmap_idx].inode_id *
+ fs->sect_perblk, 0, fs->blksz, journal_buffer);
+ if (status == 0)
+ goto fail;
+ if (ext4fs_log_journal(journal_buffer, bgd[ibmap_idx].inode_id))
+ goto fail;
+
+ ext4fs_update();
+ ext4fs_deinit();
+
+ if (ext4fs_init() != 0) {
+ printf("error in File System init\n");
+ goto fail;
+ }
+
+ free(start_block_address);
+ free(journal_buffer);
+
+ return 0;
+fail:
+ free(start_block_address);
+ free(journal_buffer);
+
+ return -1;
+}
+
+int ext4fs_init(void)
+{
+ short status;
+ int i;
+ unsigned int real_free_blocks = 0;
+ struct ext_filesystem *fs = get_fs();
+
+ /* populate fs */
+ fs->blksz = EXT2_BLOCK_SIZE(ext4fs_root);
+ fs->inodesz = INODE_SIZE_FILESYSTEM(ext4fs_root);
+ fs->sect_perblk = fs->blksz >> fs->dev_desc->log2blksz;
+
+ /* get the superblock */
+ fs->sb = zalloc(SUPERBLOCK_SIZE);
+ if (!fs->sb)
+ return -ENOMEM;
+ if (!ext4_read_superblock((char *)fs->sb))
+ goto fail;
+
+ /* init journal */
+ if (ext4fs_init_journal())
+ goto fail;
+
+ /* get total no of blockgroups */
+ fs->no_blkgrp = (uint32_t)ext4fs_div_roundup(
+ (ext4fs_root->sblock.total_blocks -
+ ext4fs_root->sblock.first_data_block),
+ ext4fs_root->sblock.blocks_per_group);
+
+ /* get the block group descriptor table */
+ fs->gdtable_blkno = ((EXT2_MIN_BLOCK_SIZE == fs->blksz) + 1);
+ if (ext4fs_get_bgdtable() == -1) {
+ printf("Error in getting the block group descriptor table\n");
+ goto fail;
+ }
+ fs->bgd = (struct ext2_block_group *)fs->gdtable;
+
+ /* load all the available bitmap block of the partition */
+ fs->blk_bmaps = zalloc(fs->no_blkgrp * sizeof(char *));
+ if (!fs->blk_bmaps)
+ goto fail;
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ fs->blk_bmaps[i] = zalloc(fs->blksz);
+ if (!fs->blk_bmaps[i])
+ goto fail;
+ }
+
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ status =
+ ext4fs_devread((lbaint_t)fs->bgd[i].block_id *
+ fs->sect_perblk, 0,
+ fs->blksz, (char *)fs->blk_bmaps[i]);
+ if (status == 0)
+ goto fail;
+ }
+
+ /* load all the available inode bitmap of the partition */
+ fs->inode_bmaps = zalloc(fs->no_blkgrp * sizeof(unsigned char *));
+ if (!fs->inode_bmaps)
+ goto fail;
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ fs->inode_bmaps[i] = zalloc(fs->blksz);
+ if (!fs->inode_bmaps[i])
+ goto fail;
+ }
+
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ status = ext4fs_devread((lbaint_t)fs->bgd[i].inode_id *
+ fs->sect_perblk,
+ 0, fs->blksz,
+ (char *)fs->inode_bmaps[i]);
+ if (status == 0)
+ goto fail;
+ }
+
+ /*
+ * check filesystem consistency with free blocks of file system
+ * some time we observed that superblock freeblocks does not match
+ * with the blockgroups freeblocks when improper
+ * reboot of a linux kernel
+ */
+ for (i = 0; i < fs->no_blkgrp; i++)
+ real_free_blocks = real_free_blocks + fs->bgd[i].free_blocks;
+ if (real_free_blocks != fs->sb->free_blocks)
+ fs->sb->free_blocks = real_free_blocks;
+
+ return 0;
+fail:
+ ext4fs_deinit();
+
+ return -1;
+}
+
+void ext4fs_deinit(void)
+{
+ int i;
+ struct ext2_inode inode_journal;
+ struct journal_superblock_t *jsb;
+ long int blknr;
+ struct ext_filesystem *fs = get_fs();
+
+ /* free journal */
+ char *temp_buff = zalloc(fs->blksz);
+ if (temp_buff) {
+ ext4fs_read_inode(ext4fs_root, EXT2_JOURNAL_INO,
+ &inode_journal);
+ blknr = read_allocated_block(&inode_journal,
+ EXT2_JOURNAL_SUPERBLOCK);
+ ext4fs_devread((lbaint_t)blknr * fs->sect_perblk, 0, fs->blksz,
+ temp_buff);
+ jsb = (struct journal_superblock_t *)temp_buff;
+ jsb->s_start = cpu_to_be32(0);
+ put_ext4((uint64_t) (blknr * fs->blksz),
+ (struct journal_superblock_t *)temp_buff, fs->blksz);
+ free(temp_buff);
+ }
+ ext4fs_free_journal();
+
+ /* get the superblock */
+ ext4_read_superblock((char *)fs->sb);
+ fs->sb->feature_incompat &= ~EXT3_FEATURE_INCOMPAT_RECOVER;
+ put_ext4((uint64_t)(SUPERBLOCK_SIZE),
+ (struct ext2_sblock *)fs->sb, (uint32_t)SUPERBLOCK_SIZE);
+ free(fs->sb);
+ fs->sb = NULL;
+
+ if (fs->blk_bmaps) {
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ free(fs->blk_bmaps[i]);
+ fs->blk_bmaps[i] = NULL;
+ }
+ free(fs->blk_bmaps);
+ fs->blk_bmaps = NULL;
+ }
+
+ if (fs->inode_bmaps) {
+ for (i = 0; i < fs->no_blkgrp; i++) {
+ free(fs->inode_bmaps[i]);
+ fs->inode_bmaps[i] = NULL;
+ }
+ free(fs->inode_bmaps);
+ fs->inode_bmaps = NULL;
+ }
+
+
+ free(fs->gdtable);
+ fs->gdtable = NULL;
+ fs->bgd = NULL;
+ /*
+ * reinitiliazed the global inode and
+ * block bitmap first execution check variables
+ */
+ fs->first_pass_ibmap = 0;
+ fs->first_pass_bbmap = 0;
+ fs->curr_inode_no = 0;
+ fs->curr_blkno = 0;
+}
+
+static int ext4fs_write_file(struct ext2_inode *file_inode,
+ int pos, unsigned int len, char *buf)
+{
+ int i;
+ int blockcnt;
+ unsigned int filesize = __le32_to_cpu(file_inode->size);
+ struct ext_filesystem *fs = get_fs();
+ int log2blksz = fs->dev_desc->log2blksz;
+ int log2_fs_blocksize = LOG2_BLOCK_SIZE(ext4fs_root) - log2blksz;
+ int previous_block_number = -1;
+ int delayed_start = 0;
+ int delayed_extent = 0;
+ int delayed_next = 0;
+ char *delayed_buf = NULL;
+
+ /* Adjust len so it we can't read past the end of the file. */
+ if (len > filesize)
+ len = filesize;
+
+ blockcnt = ((len + pos) + fs->blksz - 1) / fs->blksz;
+
+ for (i = pos / fs->blksz; i < blockcnt; i++) {
+ long int blknr;
+ int blockend = fs->blksz;
+ int skipfirst = 0;
+ blknr = read_allocated_block(file_inode, i);
+ if (blknr < 0)
+ return -1;
+
+ blknr = blknr << log2_fs_blocksize;
+
+ if (blknr) {
+ if (previous_block_number != -1) {
+ if (delayed_next == blknr) {
+ delayed_extent += blockend;
+ delayed_next += blockend >> log2blksz;
+ } else { /* spill */
+ put_ext4((uint64_t)
+ (delayed_start << log2blksz),
+ delayed_buf,
+ (uint32_t) delayed_extent);
+ previous_block_number = blknr;
+ delayed_start = blknr;
+ delayed_extent = blockend;
+ delayed_buf = buf;
+ delayed_next = blknr +
+ (blockend >> log2blksz);
+ }
+ } else {
+ previous_block_number = blknr;
+ delayed_start = blknr;
+ delayed_extent = blockend;
+ delayed_buf = buf;
+ delayed_next = blknr +
+ (blockend >> log2blksz);
+ }
+ } else {
+ if (previous_block_number != -1) {
+ /* spill */
+ put_ext4((uint64_t) (delayed_start <<
+ log2blksz),
+ delayed_buf,
+ (uint32_t) delayed_extent);
+ previous_block_number = -1;
+ }
+ memset(buf, 0, fs->blksz - skipfirst);
+ }
+ buf += fs->blksz - skipfirst;
+ }
+ if (previous_block_number != -1) {
+ /* spill */
+ put_ext4((uint64_t) (delayed_start << log2blksz),
+ delayed_buf, (uint32_t) delayed_extent);
+ previous_block_number = -1;
+ }
+
+ return len;
+}
+
+int ext4fs_write(const char *fname, unsigned char *buffer,
+ unsigned long sizebytes)
+{
+ int ret = 0;
+ struct ext2_inode *file_inode = NULL;
+ unsigned char *inode_buffer = NULL;
+ int parent_inodeno;
+ int inodeno;
+ time_t timestamp = 0;
+
+ uint64_t bytes_reqd_for_file;
+ unsigned int blks_reqd_for_file;
+ unsigned int blocks_remaining;
+ int existing_file_inodeno;
+ char *temp_ptr = NULL;
+ long int itable_blkno;
+ long int parent_itable_blkno;
+ long int blkoff;
+ struct ext2_sblock *sblock = &(ext4fs_root->sblock);
+ unsigned int inodes_per_block;
+ unsigned int ibmap_idx;
+ struct ext_filesystem *fs = get_fs();
+ ALLOC_CACHE_ALIGN_BUFFER(char, filename, 256);
+ memset(filename, 0x00, sizeof(filename));
+
+ g_parent_inode = zalloc(sizeof(struct ext2_inode));
+ if (!g_parent_inode)
+ goto fail;
+
+ if (ext4fs_init() != 0) {
+ printf("error in File System init\n");
+ return -1;
+ }
+ inodes_per_block = fs->blksz / fs->inodesz;
+ parent_inodeno = ext4fs_get_parent_inode_num(fname, filename, F_FILE);
+ if (parent_inodeno == -1)
+ goto fail;
+ if (ext4fs_iget(parent_inodeno, g_parent_inode))
+ goto fail;
+ /* check if the filename is already present in root */
+ existing_file_inodeno = ext4fs_filename_check(filename);
+ if (existing_file_inodeno != -1) {
+ ret = ext4fs_delete_file(existing_file_inodeno);
+ fs->first_pass_bbmap = 0;
+ fs->curr_blkno = 0;
+
+ fs->first_pass_ibmap = 0;
+ fs->curr_inode_no = 0;
+ if (ret)
+ goto fail;
+ }
+ /* calucalate how many blocks required */
+ bytes_reqd_for_file = sizebytes;
+ blks_reqd_for_file = lldiv(bytes_reqd_for_file, fs->blksz);
+ if (do_div(bytes_reqd_for_file, fs->blksz) != 0) {
+ blks_reqd_for_file++;
+ debug("total bytes for a file %u\n", blks_reqd_for_file);
+ }
+ blocks_remaining = blks_reqd_for_file;
+ /* test for available space in partition */
+ if (fs->sb->free_blocks < blks_reqd_for_file) {
+ printf("Not enough space on partition !!!\n");
+ goto fail;
+ }
+
+ ext4fs_update_parent_dentry(filename, &inodeno, FILETYPE_REG);
+ /* prepare file inode */
+ inode_buffer = zalloc(fs->inodesz);
+ if (!inode_buffer)
+ goto fail;
+ file_inode = (struct ext2_inode *)inode_buffer;
+ file_inode->mode = S_IFREG | S_IRWXU |
+ S_IRGRP | S_IROTH | S_IXGRP | S_IXOTH;
+ /* ToDo: Update correct time */
+ file_inode->mtime = timestamp;
+ file_inode->atime = timestamp;
+ file_inode->ctime = timestamp;
+ file_inode->nlinks = 1;
+ file_inode->size = sizebytes;
+
+ /* Allocate data blocks */
+ ext4fs_allocate_blocks(file_inode, blocks_remaining,
+ &blks_reqd_for_file);
+ file_inode->blockcnt = (blks_reqd_for_file * fs->blksz) >>
+ fs->dev_desc->log2blksz;
+
+ temp_ptr = zalloc(fs->blksz);
+ if (!temp_ptr)
+ goto fail;
+ ibmap_idx = inodeno / ext4fs_root->sblock.inodes_per_group;
+ inodeno--;
+ itable_blkno = __le32_to_cpu(fs->bgd[ibmap_idx].inode_table_id) +
+ (inodeno % __le32_to_cpu(sblock->inodes_per_group)) /
+ inodes_per_block;
+ blkoff = (inodeno % inodes_per_block) * fs->inodesz;
+ ext4fs_devread((lbaint_t)itable_blkno * fs->sect_perblk, 0, fs->blksz,
+ temp_ptr);
+ if (ext4fs_log_journal(temp_ptr, itable_blkno))
+ goto fail;
+
+ memcpy(temp_ptr + blkoff, inode_buffer, fs->inodesz);
+ if (ext4fs_put_metadata(temp_ptr, itable_blkno))
+ goto fail;
+ /* copy the file content into data blocks */
+ if (ext4fs_write_file(file_inode, 0, sizebytes, (char *)buffer) == -1) {
+ printf("Error in copying content\n");
+ goto fail;
+ }
+ ibmap_idx = parent_inodeno / ext4fs_root->sblock.inodes_per_group;
+ parent_inodeno--;
+ parent_itable_blkno = __le32_to_cpu(fs->bgd[ibmap_idx].inode_table_id) +
+ (parent_inodeno %
+ __le32_to_cpu(sblock->inodes_per_group)) / inodes_per_block;
+ blkoff = (parent_inodeno % inodes_per_block) * fs->inodesz;
+ if (parent_itable_blkno != itable_blkno) {
+ memset(temp_ptr, '\0', fs->blksz);
+ ext4fs_devread((lbaint_t)parent_itable_blkno * fs->sect_perblk,
+ 0, fs->blksz, temp_ptr);
+ if (ext4fs_log_journal(temp_ptr, parent_itable_blkno))
+ goto fail;
+
+ memcpy(temp_ptr + blkoff, g_parent_inode,
+ sizeof(struct ext2_inode));
+ if (ext4fs_put_metadata(temp_ptr, parent_itable_blkno))
+ goto fail;
+ free(temp_ptr);
+ } else {
+ /*
+ * If parent and child fall in same inode table block
+ * both should be kept in 1 buffer
+ */
+ memcpy(temp_ptr + blkoff, g_parent_inode,
+ sizeof(struct ext2_inode));
+ gd_index--;
+ if (ext4fs_put_metadata(temp_ptr, itable_blkno))
+ goto fail;
+ free(temp_ptr);
+ }
+ ext4fs_update();
+ ext4fs_deinit();
+
+ fs->first_pass_bbmap = 0;
+ fs->curr_blkno = 0;
+ fs->first_pass_ibmap = 0;
+ fs->curr_inode_no = 0;
+ free(inode_buffer);
+ free(g_parent_inode);
+ g_parent_inode = NULL;
+
+ return 0;
+fail:
+ ext4fs_deinit();
+ free(inode_buffer);
+ free(g_parent_inode);
+ g_parent_inode = NULL;
+
+ return -1;
+}
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c
new file mode 100644
index 0000000000..735b256417
--- /dev/null
+++ b/fs/ext4/ext4fs.c
@@ -0,0 +1,220 @@
+/*
+ * (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>
+ *
+ * ext4ls and ext4load : Based on ext2 ls and load support in Uboot.
+ * Ext4 read optimization taken from Open-Moko
+ * Qi bootloader
+ *
+ * (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.
+ *
+ * ext4write : Based on generic ext4 protocol.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <ext_common.h>
+#include <ext4fs.h>
+#include "ext4_common.h"
+
+int ext4fs_symlinknest;
+struct ext_filesystem ext_fs;
+
+struct ext_filesystem *get_fs(void)
+{
+ return &ext_fs;
+}
+
+void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot)
+{
+ if ((node != &ext4fs_root->diropen) && (node != currroot))
+ free(node);
+}
+
+/*
+ * Taken from openmoko-kernel mailing list: By Andy green
+ * Optimized read file API : collects and defers contiguous sector
+ * reads into one potentially more efficient larger sequential read action
+ */
+int ext4fs_read_file(struct ext2fs_node *node, int pos,
+ unsigned int len, char *buf)
+{
+ struct ext_filesystem *fs = get_fs();
+ int i;
+ lbaint_t blockcnt;
+ int log2blksz = fs->dev_desc->log2blksz;
+ int log2_fs_blocksize = LOG2_BLOCK_SIZE(node->data) - log2blksz;
+ int blocksize = (1 << (log2_fs_blocksize + log2blksz));
+ unsigned int filesize = __le32_to_cpu(node->inode.size);
+ lbaint_t previous_block_number = -1;
+ lbaint_t delayed_start = 0;
+ lbaint_t delayed_extent = 0;
+ lbaint_t delayed_skipfirst = 0;
+ lbaint_t delayed_next = 0;
+ char *delayed_buf = NULL;
+ short status;
+
+ /* Adjust len so it we can't read past the end of the file. */
+ if (len > filesize)
+ len = filesize;
+
+ blockcnt = ((len + pos) + blocksize - 1) / blocksize;
+
+ for (i = pos / blocksize; i < blockcnt; i++) {
+ lbaint_t blknr;
+ int blockoff = pos % blocksize;
+ int blockend = blocksize;
+ int skipfirst = 0;
+ blknr = read_allocated_block(&(node->inode), i);
+ if (blknr < 0)
+ return -1;
+
+ blknr = blknr << log2_fs_blocksize;
+
+ /* Last block. */
+ if (i == blockcnt - 1) {
+ blockend = (len + pos) % blocksize;
+
+ /* The last portion is exactly blocksize. */
+ if (!blockend)
+ blockend = blocksize;
+ }
+
+ /* First block. */
+ if (i == pos / blocksize) {
+ skipfirst = blockoff;
+ blockend -= skipfirst;
+ }
+ if (blknr) {
+ int status;
+
+ if (previous_block_number != -1) {
+ if (delayed_next == blknr) {
+ delayed_extent += blockend;
+ delayed_next += blockend >> log2blksz;
+ } else { /* spill */
+ status = ext4fs_devread(delayed_start,
+ delayed_skipfirst,
+ delayed_extent,
+ delayed_buf);
+ if (status == 0)
+ return -1;
+ previous_block_number = blknr;
+ delayed_start = blknr;
+ delayed_extent = blockend;
+ delayed_skipfirst = skipfirst;
+ delayed_buf = buf;
+ delayed_next = blknr +
+ (blockend >> log2blksz);
+ }
+ } else {
+ previous_block_number = blknr;
+ delayed_start = blknr;
+ delayed_extent = blockend;
+ delayed_skipfirst = skipfirst;
+ delayed_buf = buf;
+ delayed_next = blknr +
+ (blockend >> log2blksz);
+ }
+ } else {
+ if (previous_block_number != -1) {
+ /* spill */
+ status = ext4fs_devread(delayed_start,
+ delayed_skipfirst,
+ delayed_extent,
+ delayed_buf);
+ if (status == 0)
+ return -1;
+ previous_block_number = -1;
+ }
+ memset(buf, 0, blocksize - skipfirst);
+ }
+ buf += blocksize - skipfirst;
+ }
+ if (previous_block_number != -1) {
+ /* spill */
+ status = ext4fs_devread(delayed_start,
+ delayed_skipfirst, delayed_extent,
+ delayed_buf);
+ if (status == 0)
+ return -1;
+ previous_block_number = -1;
+ }
+
+ return len;
+}
+
+int ext4fs_ls(const char *dirname)
+{
+ struct ext2fs_node *dirnode;
+ int status;
+
+ if (dirname == NULL)
+ return 0;
+
+ status = ext4fs_find_file(dirname, &ext4fs_root->diropen, &dirnode,
+ FILETYPE_DIRECTORY);
+ if (status != 1) {
+ printf("** Can not find directory. **\n");
+ return 1;
+ }
+
+ ext4fs_iterate_dir(dirnode, NULL, NULL, NULL);
+ ext4fs_free_node(dirnode, &ext4fs_root->diropen);
+
+ return 0;
+}
+
+int ext4fs_read(char *buf, unsigned len)
+{
+ if (ext4fs_root == NULL || ext4fs_file == NULL)
+ return 0;
+
+ return ext4fs_read_file(ext4fs_file, 0, len, buf);
+}
+
+int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
+ disk_partition_t *fs_partition)
+{
+ ext4fs_set_blk_dev(fs_dev_desc, fs_partition);
+
+ if (!ext4fs_mount(fs_partition->size)) {
+ ext4fs_close();
+ return -1;
+ }
+
+ return 0;
+}
+
+int ext4_read_file(const char *filename, void *buf, int offset, int len)
+{
+ int file_len;
+ int len_read;
+
+ if (offset != 0) {
+ printf("** Cannot support non-zero offset **\n");
+ return -1;
+ }
+
+ file_len = ext4fs_open(filename);
+ if (file_len < 0) {
+ printf("** File not found %s **\n", filename);
+ return -1;
+ }
+
+ if (len == 0)
+ len = file_len;
+
+ len_read = ext4fs_read(buf, len);
+
+ return len_read;
+}
diff --git a/fs/fs.c b/fs/fs.c
new file mode 100644
index 0000000000..be1855d129
--- /dev/null
+++ b/fs/fs.c
@@ -0,0 +1,354 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <common.h>
+#include <part.h>
+#include <ext4fs.h>
+#include <fat.h>
+#include <fs.h>
+#include <sandboxfs.h>
+#include <asm/io.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static block_dev_desc_t *fs_dev_desc;
+static disk_partition_t fs_partition;
+static int fs_type = FS_TYPE_ANY;
+
+static inline int fs_probe_unsupported(block_dev_desc_t *fs_dev_desc,
+ disk_partition_t *fs_partition)
+{
+ printf("** Unrecognized filesystem type **\n");
+ return -1;
+}
+
+static inline int fs_ls_unsupported(const char *dirname)
+{
+ return -1;
+}
+
+static inline int fs_read_unsupported(const char *filename, void *buf,
+ int offset, int len)
+{
+ return -1;
+}
+
+static inline int fs_write_unsupported(const char *filename, void *buf,
+ int offset, int len)
+{
+ return -1;
+}
+
+static inline void fs_close_unsupported(void)
+{
+}
+
+struct fstype_info {
+ int fstype;
+ int (*probe)(block_dev_desc_t *fs_dev_desc,
+ disk_partition_t *fs_partition);
+ int (*ls)(const char *dirname);
+ int (*read)(const char *filename, void *buf, int offset, int len);
+ int (*write)(const char *filename, void *buf, int offset, int len);
+ void (*close)(void);
+};
+
+static struct fstype_info fstypes[] = {
+#ifdef CONFIG_FS_FAT
+ {
+ .fstype = FS_TYPE_FAT,
+ .probe = fat_set_blk_dev,
+ .close = fat_close,
+ .ls = file_fat_ls,
+ .read = fat_read_file,
+ },
+#endif
+#ifdef CONFIG_FS_EXT4
+ {
+ .fstype = FS_TYPE_EXT,
+ .probe = ext4fs_probe,
+ .close = ext4fs_close,
+ .ls = ext4fs_ls,
+ .read = ext4_read_file,
+ },
+#endif
+#ifdef CONFIG_SANDBOX
+ {
+ .fstype = FS_TYPE_SANDBOX,
+ .probe = sandbox_fs_set_blk_dev,
+ .close = sandbox_fs_close,
+ .ls = sandbox_fs_ls,
+ .read = fs_read_sandbox,
+ .write = fs_write_sandbox,
+ },
+#endif
+ {
+ .fstype = FS_TYPE_ANY,
+ .probe = fs_probe_unsupported,
+ .close = fs_close_unsupported,
+ .ls = fs_ls_unsupported,
+ .read = fs_read_unsupported,
+ .write = fs_write_unsupported,
+ },
+};
+
+static struct fstype_info *fs_get_info(int fstype)
+{
+ struct fstype_info *info;
+ int i;
+
+ for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes) - 1; i++, info++) {
+ if (fstype == info->fstype)
+ return info;
+ }
+
+ /* Return the 'unsupported' sentinel */
+ return info;
+}
+
+int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype)
+{
+ struct fstype_info *info;
+ int part, i;
+#ifdef CONFIG_NEEDS_MANUAL_RELOC
+ static int relocated;
+
+ if (!relocated) {
+ for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes);
+ i++, info++) {
+ info->probe += gd->reloc_off;
+ info->close += gd->reloc_off;
+ info->ls += gd->reloc_off;
+ info->read += gd->reloc_off;
+ info->write += gd->reloc_off;
+ }
+ relocated = 1;
+ }
+#endif
+
+ part = get_device_and_partition(ifname, dev_part_str, &fs_dev_desc,
+ &fs_partition, 1);
+ if (part < 0)
+ return -1;
+
+ for (i = 0, info = fstypes; i < ARRAY_SIZE(fstypes); i++, info++) {
+ if (fstype != FS_TYPE_ANY && info->fstype != FS_TYPE_ANY &&
+ fstype != info->fstype)
+ continue;
+
+ if (!info->probe(fs_dev_desc, &fs_partition)) {
+ fs_type = info->fstype;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static void fs_close(void)
+{
+ struct fstype_info *info = fs_get_info(fs_type);
+
+ info->close();
+
+ fs_type = FS_TYPE_ANY;
+}
+
+int fs_ls(const char *dirname)
+{
+ int ret;
+
+ struct fstype_info *info = fs_get_info(fs_type);
+
+ ret = info->ls(dirname);
+
+ fs_type = FS_TYPE_ANY;
+ fs_close();
+
+ return ret;
+}
+
+int fs_read(const char *filename, ulong addr, int offset, int len)
+{
+ struct fstype_info *info = fs_get_info(fs_type);
+ void *buf;
+ int ret;
+
+ /*
+ * We don't actually know how many bytes are being read, since len==0
+ * means read the whole file.
+ */
+ buf = map_sysmem(addr, len);
+ ret = info->read(filename, buf, offset, len);
+ unmap_sysmem(buf);
+
+ /* If we requested a specific number of bytes, check we got it */
+ if (ret >= 0 && len && ret != len) {
+ printf("** Unable to read file %s **\n", filename);
+ ret = -1;
+ }
+ fs_close();
+
+ return ret;
+}
+
+int fs_write(const char *filename, ulong addr, int offset, int len)
+{
+ struct fstype_info *info = fs_get_info(fs_type);
+ void *buf;
+ int ret;
+
+ /*
+ * We don't actually know how many bytes are being read, since len==0
+ * means read the whole file.
+ */
+ buf = map_sysmem(addr, len);
+ ret = info->write(filename, buf, offset, len);
+ unmap_sysmem(buf);
+
+ /* If we requested a specific number of bytes, check we got it */
+ if (ret >= 0 && len && ret != len) {
+ printf("** Unable to write file %s **\n", filename);
+ ret = -1;
+ }
+ fs_close();
+
+ return ret;
+}
+
+int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype)
+{
+ unsigned long addr;
+ const char *addr_str;
+ const char *filename;
+ unsigned long bytes;
+ unsigned long pos;
+ int len_read;
+ unsigned long time;
+
+ if (argc < 2)
+ return CMD_RET_USAGE;
+ if (argc > 7)
+ return CMD_RET_USAGE;
+
+ if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
+ return 1;
+
+ if (argc >= 4) {
+ addr = simple_strtoul(argv[3], NULL, 16);
+ } else {
+ addr_str = getenv("loadaddr");
+ if (addr_str != NULL)
+ addr = simple_strtoul(addr_str, NULL, 16);
+ else
+ addr = CONFIG_SYS_LOAD_ADDR;
+ }
+ if (argc >= 5) {
+ filename = argv[4];
+ } else {
+ filename = getenv("bootfile");
+ if (!filename) {
+ puts("** No boot file defined **\n");
+ return 1;
+ }
+ }
+ if (argc >= 6)
+ bytes = simple_strtoul(argv[5], NULL, 16);
+ else
+ bytes = 0;
+ if (argc >= 7)
+ pos = simple_strtoul(argv[6], NULL, 16);
+ else
+ pos = 0;
+
+ time = get_timer(0);
+ len_read = fs_read(filename, addr, pos, bytes);
+ time = get_timer(time);
+ if (len_read <= 0)
+ return 1;
+
+ printf("%d bytes read in %lu ms", len_read, time);
+ if (time > 0) {
+ puts(" (");
+ print_size(len_read / time * 1000, "/s");
+ puts(")");
+ }
+ puts("\n");
+
+ setenv_hex("filesize", len_read);
+
+ return 0;
+}
+
+int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype)
+{
+ if (argc < 2)
+ return CMD_RET_USAGE;
+ if (argc > 4)
+ return CMD_RET_USAGE;
+
+ if (fs_set_blk_dev(argv[1], (argc >= 3) ? argv[2] : NULL, fstype))
+ return 1;
+
+ if (fs_ls(argc >= 4 ? argv[3] : "/"))
+ return 1;
+
+ return 0;
+}
+
+int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype)
+{
+ unsigned long addr;
+ const char *filename;
+ unsigned long bytes;
+ unsigned long pos;
+ int len;
+ unsigned long time;
+
+ if (argc < 6 || argc > 7)
+ return CMD_RET_USAGE;
+
+ if (fs_set_blk_dev(argv[1], argv[2], fstype))
+ return 1;
+
+ filename = argv[3];
+ addr = simple_strtoul(argv[4], NULL, 16);
+ bytes = simple_strtoul(argv[5], NULL, 16);
+ if (argc >= 7)
+ pos = simple_strtoul(argv[6], NULL, 16);
+ else
+ pos = 0;
+
+ time = get_timer(0);
+ len = fs_write(filename, addr, pos, bytes);
+ time = get_timer(time);
+ if (len <= 0)
+ return 1;
+
+ printf("%d bytes written in %lu ms", len, time);
+ if (time > 0) {
+ puts(" (");
+ print_size(len / time * 1000, "/s");
+ puts(")");
+ }
+ puts("\n");
+
+ return 0;
+}
diff --git a/include/common.h b/include/common.h
index cb80d83ec8..0d9458ec84 100644
--- a/include/common.h
+++ b/include/common.h
@@ -773,6 +773,23 @@ int cpu_disable(int nr);
int cpu_release(int nr, int argc, char * const argv[]);
#endif
+/* Define a null map_sysmem() if the architecture doesn't use it */
+# ifndef CONFIG_ARCH_MAP_SYSMEM
+static inline void *map_sysmem(phys_addr_t paddr, unsigned long len)
+{
+ return (void *)(uintptr_t)paddr;
+}
+
+static inline void unmap_sysmem(const void *vaddr)
+{
+}
+
+static inline phys_addr_t map_to_sysmem(void *ptr)
+{
+ return (phys_addr_t)(uintptr_t)ptr;
+}
+# endif
+
#endif /* __ASSEMBLY__ */
/* Put only stuff here that the assembler can digest */
diff --git a/include/configs/smdk4412.h b/include/configs/smdk4412.h
index 0cb606f1a6..d849b9a4e3 100644
--- a/include/configs/smdk4412.h
+++ b/include/configs/smdk4412.h
@@ -215,7 +215,8 @@
#define CONFIG_CMD_MTDPARTS
#define CONFIG_MTD_DEVICE
-//#define CONFIG_CMD_EXT2
+#define CONFIG_FS_EXT4
+#define CONFIG_CMD_EXT4
#define CONFIG_CMD_FAT
#define CONFIG_SYS_NAND_QUIET_TEST
diff --git a/include/ext4fs.h b/include/ext4fs.h
new file mode 100644
index 0000000000..2429380396
--- /dev/null
+++ b/include/ext4fs.h
@@ -0,0 +1,145 @@
+/*
+ * (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>
+ *
+ * Ext4 Extent data structures are taken from original ext4 fs code
+ * as found in the linux kernel.
+ *
+ * Copyright (c) 2003-2006, Cluster File Systems, Inc, info@clusterfs.com
+ * Written by Alex Tomas <alex@clusterfs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 __EXT4__
+#define __EXT4__
+#include <ext_common.h>
+
+#define EXT4_EXTENTS_FL 0x00080000 /* Inode uses extents */
+#define EXT4_EXT_MAGIC 0xf30a
+#define EXT4_FEATURE_RO_COMPAT_GDT_CSUM 0x0010
+#define EXT4_FEATURE_INCOMPAT_EXTENTS 0x0040
+#define EXT4_INDIRECT_BLOCKS 12
+
+#define EXT4_BG_INODE_UNINIT 0x0001
+#define EXT4_BG_BLOCK_UNINIT 0x0002
+#define EXT4_BG_INODE_ZEROED 0x0004
+
+/*
+ * ext4_inode has i_block array (60 bytes total).
+ * The first 12 bytes store ext4_extent_header;
+ * the remainder stores an array of ext4_extent.
+ */
+
+/*
+ * This is the extent on-disk structure.
+ * It's used at the bottom of the tree.
+ */
+struct ext4_extent {
+ __le32 ee_block; /* first logical block extent covers */
+ __le16 ee_len; /* number of blocks covered by extent */
+ __le16 ee_start_hi; /* high 16 bits of physical block */
+ __le32 ee_start_lo; /* low 32 bits of physical block */
+};
+
+/*
+ * This is index on-disk structure.
+ * It's used at all the levels except the bottom.
+ */
+struct ext4_extent_idx {
+ __le32 ei_block; /* index covers logical blocks from 'block' */
+ __le32 ei_leaf_lo; /* pointer to the physical block of the next *
+ * level. leaf or next index could be there */
+ __le16 ei_leaf_hi; /* high 16 bits of physical block */
+ __u16 ei_unused;
+};
+
+/* Each block (leaves and indexes), even inode-stored has header. */
+struct ext4_extent_header {
+ __le16 eh_magic; /* probably will support different formats */
+ __le16 eh_entries; /* number of valid entries */
+ __le16 eh_max; /* capacity of store in entries */
+ __le16 eh_depth; /* has tree real underlying blocks? */
+ __le32 eh_generation; /* generation of the tree */
+};
+
+struct ext_filesystem {
+ /* Total Sector of partition */
+ uint64_t total_sect;
+ /* Block size of partition */
+ uint32_t blksz;
+ /* Inode size of partition */
+ uint32_t inodesz;
+ /* Sectors per Block */
+ uint32_t sect_perblk;
+ /* Group Descriptor Block Number */
+ uint32_t gdtable_blkno;
+ /* Total block groups of partition */
+ uint32_t no_blkgrp;
+ /* No of blocks required for bgdtable */
+ uint32_t no_blk_pergdt;
+ /* Superblock */
+ struct ext2_sblock *sb;
+ /* Block group descritpor table */
+ struct ext2_block_group *bgd;
+ char *gdtable;
+
+ /* Block Bitmap Related */
+ unsigned char **blk_bmaps;
+ long int curr_blkno;
+ uint16_t first_pass_bbmap;
+
+ /* Inode Bitmap Related */
+ unsigned char **inode_bmaps;
+ int curr_inode_no;
+ uint16_t first_pass_ibmap;
+
+ /* Journal Related */
+
+ /* Block Device Descriptor */
+ block_dev_desc_t *dev_desc;
+};
+
+extern struct ext2_data *ext4fs_root;
+extern struct ext2fs_node *ext4fs_file;
+
+#if defined(CONFIG_EXT4_WRITE)
+extern struct ext2_inode *g_parent_inode;
+extern int gd_index;
+extern int gindex;
+
+int ext4fs_init(void);
+void ext4fs_deinit(void);
+int ext4fs_filename_check(char *filename);
+int ext4fs_write(const char *fname, unsigned char *buffer,
+ unsigned long sizebytes);
+#endif
+
+struct ext_filesystem *get_fs(void);
+int ext4fs_open(const char *filename);
+int ext4fs_read(char *buf, unsigned len);
+int ext4fs_mount(unsigned part_length);
+void ext4fs_close(void);
+int ext4fs_ls(const char *dirname);
+void ext4fs_free_node(struct ext2fs_node *node, struct ext2fs_node *currroot);
+int ext4fs_devread(lbaint_t sector, int byte_offset, int byte_len, char *buf);
+void ext4fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
+long int read_allocated_block(struct ext2_inode *inode, int fileblock);
+int ext4fs_probe(block_dev_desc_t *fs_dev_desc,
+ disk_partition_t *fs_partition);
+int ext4_read_file(const char *filename, void *buf, int offset, int len);
+int ext4_read_superblock(char *buffer);
+#endif
diff --git a/include/ext_common.h b/include/ext_common.h
new file mode 100644
index 0000000000..6cddf166d9
--- /dev/null
+++ b/include/ext_common.h
@@ -0,0 +1,180 @@
+/*
+ * (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.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __EXT_COMMON__
+#define __EXT_COMMON__
+#include <command.h>
+#define SECTOR_SIZE 0x200
+
+/* 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 */
+
+/* The size of an ext2 block in bytes. */
+#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
+
+/* Log2 size of ext2 block in bytes. */
+#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \
+ (data->sblock.log2_block_size) \
+ + EXT2_MIN_BLOCK_LOG_SIZE)
+#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;
+};
+
+extern lbaint_t part_offset;
+
+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_ext4_write(cmd_tbl_t *cmdtp, int flag, int argc,
+ char *const argv[]);
+#endif
diff --git a/include/fs.h b/include/fs.h
new file mode 100644
index 0000000000..7d9403ed87
--- /dev/null
+++ b/include/fs.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _FS_H
+#define _FS_H
+
+#include <common.h>
+
+#define FS_TYPE_ANY 0
+#define FS_TYPE_FAT 1
+#define FS_TYPE_EXT 2
+#define FS_TYPE_SANDBOX 3
+
+/*
+ * Tell the fs layer which block device an partition to use for future
+ * commands. This also internally identifies the filesystem that is present
+ * within the partition. The identification process may be limited to a
+ * specific filesystem type by passing FS_* in the fstype parameter.
+ *
+ * Returns 0 on success.
+ * Returns non-zero if there is an error accessing the disk or partition, or
+ * no known filesystem type could be recognized on it.
+ */
+int fs_set_blk_dev(const char *ifname, const char *dev_part_str, int fstype);
+
+/*
+ * Print the list of files on the partition previously set by fs_set_blk_dev(),
+ * in directory "dirname".
+ *
+ * Returns 0 on success. Returns non-zero on error.
+ */
+int fs_ls(const char *dirname);
+
+/*
+ * Read file "filename" from the partition previously set by fs_set_blk_dev(),
+ * to address "addr", starting at byte offset "offset", and reading "len"
+ * bytes. "offset" may be 0 to read from the start of the file. "len" may be
+ * 0 to read the entire file. Note that not all filesystem types support
+ * either/both offset!=0 or len!=0.
+ *
+ * Returns number of bytes read on success. Returns <= 0 on error.
+ */
+int fs_read(const char *filename, ulong addr, int offset, int len);
+
+/*
+ * Common implementation for various filesystem commands, optionally limited
+ * to a specific filesystem type via the fstype parameter.
+ */
+int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
+int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
+int do_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
+
+#endif /* _FS_H */
diff --git a/include/sandboxfs.h b/include/sandboxfs.h
new file mode 100644
index 0000000000..8ea8cb7e2e
--- /dev/null
+++ b/include/sandboxfs.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2012, Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * 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 __SANDBOX_FS__
+#define __SANDBOX_FS__
+
+int sandbox_fs_set_blk_dev(block_dev_desc_t *rbdd, disk_partition_t *info);
+
+long sandbox_fs_read_at(const char *filename, unsigned long pos,
+ void *buffer, unsigned long maxsize);
+
+void sandbox_fs_close(void);
+int sandbox_fs_ls(const char *dirname);
+int fs_read_sandbox(const char *filename, void *buf, int offset, int len);
+int fs_write_sandbox(const char *filename, void *buf, int offset, int len);
+
+#endif