Signed-off-by: Uma Shankar <uma.shankar@samsung.com> Signed-off-by: Manjunatha C Achar <a.manjunatha@samsung.com> Signed-off-by: Iqbal Shareef <iqbal.ams@samsung.com> Signed-off-by: Hakgoo Lee <goodguy.lee@samsung.com>master
parent
4d3c95f5ea
commit
a1596438a6
@ -0,0 +1,96 @@ |
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/*
|
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* (C) Copyright 2011 - 2012 Samsung Electronics |
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* EXT4 filesystem implementation in Uboot by |
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* Uma Shankar <uma.shankar@samsung.com> |
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* Manjunatha C Achar <a.manjunatha@samsung.com> |
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* |
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* Ext4fs support |
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* made from existing cmd_ext2.c file of Uboot |
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* |
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* (C) Copyright 2004 |
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* esd gmbh <www.esd-electronics.com> |
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* Reinhard Arlt <reinhard.arlt@esd-electronics.com> |
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* |
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* made from cmd_reiserfs by |
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* |
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* (C) Copyright 2003 - 2004 |
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* Sysgo Real-Time Solutions, AG <www.elinos.com> |
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* Pavel Bartusek <pba@sysgo.com> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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* |
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*/ |
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|
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/*
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* Changelog: |
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* 0.1 - Newly created file for ext4fs support. Taken from cmd_ext2.c |
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* file in uboot. Added ext4fs ls load and write support. |
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*/ |
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#include <common.h> |
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#include <part.h> |
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#include <config.h> |
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#include <command.h> |
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#include <image.h> |
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#include <linux/ctype.h> |
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#include <asm/byteorder.h> |
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#include <ext_common.h> |
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#include <ext4fs.h> |
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#include <linux/stat.h> |
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#include <malloc.h> |
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#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE) |
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#include <usb.h> |
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#endif |
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#if !defined(CONFIG_DOS_PARTITION) && !defined(CONFIG_EFI_PARTITION) |
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#error DOS or EFI partition support must be selected |
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#endif |
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uint64_t total_sector; |
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uint64_t part_offset; |
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#define DOS_PART_MAGIC_OFFSET 0x1fe |
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#define DOS_FS_TYPE_OFFSET 0x36 |
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#define DOS_FS32_TYPE_OFFSET 0x52 |
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int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc, |
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char *const argv[]) |
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{ |
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if (do_ext_load(cmdtp, flag, argc, argv)) |
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return -1; |
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return 0; |
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} |
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int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) |
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{ |
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if (do_ext_ls(cmdtp, flag, argc, argv)) |
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return -1; |
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return 0; |
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} |
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U_BOOT_CMD(ext4ls, 4, 1, do_ext4_ls, |
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"list files in a directory (default /)", |
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"<interface> <dev[:part]> [directory]\n" |
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" - list files from 'dev' on 'interface' in a 'directory'"); |
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|
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U_BOOT_CMD(ext4load, 6, 0, do_ext4_load, |
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"load binary file from a Ext4 filesystem", |
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"<interface> <dev[:part]> [addr] [filename] [bytes]\n" |
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" - load binary file 'filename' from 'dev' on 'interface'\n" |
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" to address 'addr' from ext4 filesystem"); |
@ -0,0 +1,259 @@ |
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/*
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* (C) Copyright 2011 - 2012 Samsung Electronics |
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* EXT2/4 filesystem implementation in Uboot by |
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* Uma Shankar <uma.shankar@samsung.com> |
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* Manjunatha C Achar <a.manjunatha@samsung.com> |
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* |
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* Ext4fs support |
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* made from existing cmd_ext2.c file of Uboot |
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* |
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* (C) Copyright 2004 |
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* esd gmbh <www.esd-electronics.com> |
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* Reinhard Arlt <reinhard.arlt@esd-electronics.com> |
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* |
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* made from cmd_reiserfs by |
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* |
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* (C) Copyright 2003 - 2004 |
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* Sysgo Real-Time Solutions, AG <www.elinos.com> |
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* Pavel Bartusek <pba@sysgo.com> |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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* |
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*/ |
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|
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/*
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* Changelog: |
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* 0.1 - Newly created file for ext4fs support. Taken from cmd_ext2.c |
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* file in uboot. Added ext4fs ls load and write support. |
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*/ |
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#include <common.h> |
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#include <part.h> |
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#include <config.h> |
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#include <command.h> |
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#include <image.h> |
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#include <linux/ctype.h> |
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#include <asm/byteorder.h> |
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#include <ext_common.h> |
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#include <ext4fs.h> |
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#include <linux/stat.h> |
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#include <malloc.h> |
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#if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE) |
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#include <usb.h> |
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#endif |
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#if !defined(CONFIG_DOS_PARTITION) && !defined(CONFIG_EFI_PARTITION) |
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#error DOS or EFI partition support must be selected |
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#endif |
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#define DOS_PART_MAGIC_OFFSET 0x1fe |
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#define DOS_FS_TYPE_OFFSET 0x36 |
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#define DOS_FS32_TYPE_OFFSET 0x52 |
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int do_ext_load(cmd_tbl_t *cmdtp, int flag, int argc, |
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char *const argv[]) |
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{ |
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char *filename = NULL; |
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char *ep; |
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int dev; |
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unsigned long part = 1; |
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ulong addr = 0; |
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ulong part_length; |
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int filelen; |
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disk_partition_t info; |
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struct ext_filesystem *fs; |
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char buf[12]; |
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unsigned long count; |
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const char *addr_str; |
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count = 0; |
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addr = simple_strtoul(argv[3], NULL, 16); |
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filename = getenv("bootfile"); |
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switch (argc) { |
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case 3: |
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addr_str = getenv("loadaddr"); |
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if (addr_str != NULL) |
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addr = simple_strtoul(addr_str, NULL, 16); |
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else |
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addr = CONFIG_SYS_LOAD_ADDR; |
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break; |
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case 4: |
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break; |
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case 5: |
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filename = argv[4]; |
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break; |
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case 6: |
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filename = argv[4]; |
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count = simple_strtoul(argv[5], NULL, 16); |
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break; |
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default: |
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return cmd_usage(cmdtp); |
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} |
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if (!filename) { |
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puts("** No boot file defined **\n"); |
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return 1; |
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} |
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dev = (int)simple_strtoul(argv[2], &ep, 16); |
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ext4_dev_desc = get_dev(argv[1], dev); |
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if (ext4_dev_desc == NULL) { |
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printf("** Block device %s %d not supported\n", argv[1], dev); |
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return 1; |
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} |
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if (init_fs(ext4_dev_desc)) |
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return 1; |
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fs = get_fs(); |
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if (*ep) { |
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if (*ep != ':') { |
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puts("** Invalid boot device, use `dev[:part]' **\n"); |
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goto fail; |
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} |
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part = simple_strtoul(++ep, NULL, 16); |
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} |
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if (part != 0) { |
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if (get_partition_info(fs->dev_desc, part, &info)) { |
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printf("** Bad partition %lu **\n", part); |
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goto fail; |
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} |
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if (strncmp((char *)info.type, BOOT_PART_TYPE, |
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strlen(BOOT_PART_TYPE)) != 0) { |
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printf("** Invalid partition type \"%s\"" |
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" (expect \"" BOOT_PART_TYPE "\")\n", info.type); |
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goto fail; |
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} |
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printf("Loading file \"%s\" " |
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"from %s device %d:%lu %s\n", |
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filename, argv[1], dev, part, info.name); |
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} else { |
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printf("Loading file \"%s\" from %s device %d\n", |
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filename, argv[1], dev); |
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} |
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part_length = ext4fs_set_blk_dev(fs->dev_desc, part); |
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if (part_length == 0) { |
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printf("**Bad partition - %s %d:%lu **\n", argv[1], dev, part); |
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ext4fs_close(); |
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goto fail; |
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} |
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if (!ext4fs_mount(part_length)) { |
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printf("** Bad ext2 partition or disk - %s %d:%lu **\n", |
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argv[1], dev, part); |
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ext4fs_close(); |
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goto fail; |
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} |
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filelen = ext4fs_open(filename); |
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if (filelen < 0) { |
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printf("** File not found %s\n", filename); |
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ext4fs_close(); |
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goto fail; |
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} |
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if ((count < filelen) && (count != 0)) |
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filelen = count; |
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if (ext4fs_read((char *)addr, filelen) != filelen) { |
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printf("** Unable to read \"%s\" from %s %d:%lu **\n", |
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filename, argv[1], dev, part); |
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ext4fs_close(); |
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goto fail; |
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} |
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ext4fs_close(); |
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deinit_fs(fs->dev_desc); |
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/* Loading ok, update default load address */ |
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load_addr = addr; |
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printf("%d bytes read\n", filelen); |
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sprintf(buf, "%X", filelen); |
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setenv("filesize", buf); |
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return 0; |
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fail: |
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deinit_fs(fs->dev_desc); |
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return 1; |
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} |
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int do_ext_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]) |
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{ |
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const char *filename = "/"; |
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int dev; |
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unsigned long part = 1; |
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char *ep; |
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struct ext_filesystem *fs; |
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int part_length; |
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if (argc < 3) |
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return cmd_usage(cmdtp); |
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dev = (int)simple_strtoul(argv[2], &ep, 16); |
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ext4_dev_desc = get_dev(argv[1], dev); |
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if (ext4_dev_desc == NULL) { |
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printf("\n** Block device %s %d not supported\n", argv[1], dev); |
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return 1; |
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} |
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if (init_fs(ext4_dev_desc)) |
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return 1; |
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fs = get_fs(); |
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if (*ep) { |
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if (*ep != ':') { |
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puts("\n** Invalid boot device, use `dev[:part]' **\n"); |
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goto fail; |
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} |
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part = simple_strtoul(++ep, NULL, 16); |
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} |
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if (argc == 4) |
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filename = argv[3]; |
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part_length = ext4fs_set_blk_dev(fs->dev_desc, part); |
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if (part_length == 0) { |
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printf("** Bad partition - %s %d:%lu **\n", argv[1], dev, part); |
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ext4fs_close(); |
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goto fail; |
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} |
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|
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if (!ext4fs_mount(part_length)) { |
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printf("** Bad ext2 partition or disk - %s %d:%lu **\n", |
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argv[1], dev, part); |
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ext4fs_close(); |
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goto fail; |
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} |
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|
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if (ext4fs_ls(filename)) { |
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printf("** Error extfs_ls() **\n"); |
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ext4fs_close(); |
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goto fail; |
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}; |
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ext4fs_close(); |
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deinit_fs(fs->dev_desc); |
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return 0; |
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fail: |
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deinit_fs(fs->dev_desc); |
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return 1; |
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} |
@ -1,131 +0,0 @@ |
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/*
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* (C) Copyright 2004 |
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* esd gmbh <www.esd-electronics.com> |
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* Reinhard Arlt <reinhard.arlt@esd-electronics.com> |
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* |
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* based on code of fs/reiserfs/dev.c by |
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* |
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* (C) Copyright 2003 - 2004 |
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* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* 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 |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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|
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|
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#include <common.h> |
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#include <config.h> |
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#include <ext2fs.h> |
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|
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static block_dev_desc_t *ext2fs_block_dev_desc; |
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static disk_partition_t part_info; |
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|
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int ext2fs_set_blk_dev(block_dev_desc_t *rbdd, int part) |
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{ |
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ext2fs_block_dev_desc = rbdd; |
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|
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if (part == 0) { |
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/* disk doesn't use partition table */ |
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part_info.start = 0; |
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part_info.size = rbdd->lba; |
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part_info.blksz = rbdd->blksz; |
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} else { |
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if (get_partition_info |
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(ext2fs_block_dev_desc, part, &part_info)) { |
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return 0; |
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} |
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} |
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return part_info.size; |
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} |
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|
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|
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int ext2fs_devread(int sector, int byte_offset, int byte_len, char *buf) |
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{ |
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ALLOC_CACHE_ALIGN_BUFFER(char, sec_buf, SECTOR_SIZE); |
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unsigned sectors; |
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|
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/*
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* Check partition boundaries |
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*/ |
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if ((sector < 0) || |
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((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >= |
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part_info.size)) { |
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/* errnum = ERR_OUTSIDE_PART; */ |
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printf(" ** %s read outside partition sector %d\n", |
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__func__, |
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sector); |
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return 0; |
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} |
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|
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/*
|
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* Get the read to the beginning of a partition. |
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*/ |
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sector += byte_offset >> SECTOR_BITS; |
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byte_offset &= SECTOR_SIZE - 1; |
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|
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debug(" <%d, %d, %d>\n", sector, byte_offset, byte_len); |
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|
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if (ext2fs_block_dev_desc == NULL) { |
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printf(" ** %s Invalid Block Device Descriptor (NULL)\n", |
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__func__); |
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return 0; |
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} |
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|
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if (byte_offset != 0) { |
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/* read first part which isn't aligned with start of sector */ |
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if (ext2fs_block_dev_desc-> |
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block_read(ext2fs_block_dev_desc->dev, |
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part_info.start + sector, 1, |
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(unsigned long *) sec_buf) != 1) { |
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printf(" ** %s read error **\n", __func__); |
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return 0; |
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} |
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memcpy(buf, sec_buf + byte_offset, |
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min(SECTOR_SIZE - byte_offset, byte_len)); |
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buf += min(SECTOR_SIZE - byte_offset, byte_len); |
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byte_len -= min(SECTOR_SIZE - byte_offset, byte_len); |
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sector++; |
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} |
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|
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/* read sector aligned part */ |
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sectors = byte_len / SECTOR_SIZE; |
||||
|
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if (sectors > 0) { |
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if (ext2fs_block_dev_desc->block_read( |
||||
ext2fs_block_dev_desc->dev, |
||||
part_info.start + sector, |
||||
sectors, |
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(unsigned long *) buf) != sectors) { |
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printf(" ** %s read error - block\n", __func__); |
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return 0; |
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} |
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|
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buf += sectors * SECTOR_SIZE; |
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byte_len -= sectors * SECTOR_SIZE; |
||||
sector += sectors; |
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} |
||||
|
||||
if (byte_len != 0) { |
||||
/* read rest of data which are not in whole sector */ |
||||
if (ext2fs_block_dev_desc-> |
||||
block_read(ext2fs_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); |
||||
} |
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return 1; |
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} |
@ -1,919 +0,0 @@ |
||||
/*
|
||||
* (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 |
||||
* |
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* GRUB -- GRand Unified Bootloader |
||||
* Copyright (C) 2003, 2004 Free Software Foundation, Inc. |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License as published by |
||||
* the Free Software Foundation; either version 2 of the License, or |
||||
* (at your option) any later version. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
||||
*/ |
||||
|
||||
#include <common.h> |
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#include <ext2fs.h> |
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#include <malloc.h> |
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#include <asm/byteorder.h> |
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|
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extern int ext2fs_devread (int sector, int byte_offset, int byte_len, |
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char *buf); |
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|
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/* Magic value used to identify an ext2 filesystem. */ |
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#define EXT2_MAGIC 0xEF53 |
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/* Amount of indirect blocks in an inode. */ |
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#define INDIRECT_BLOCKS 12 |
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/* Maximum lenght of a pathname. */ |
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#define EXT2_PATH_MAX 4096 |
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/* Maximum nesting of symlinks, used to prevent a loop. */ |
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#define EXT2_MAX_SYMLINKCNT 8 |
||||
|
||||
/* Filetype used in directory entry. */ |
||||
#define FILETYPE_UNKNOWN 0 |
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#define FILETYPE_REG 1 |
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#define FILETYPE_DIRECTORY 2 |
||||
#define FILETYPE_SYMLINK 7 |
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|
||||
/* Filetype information as used in inodes. */ |
||||
#define FILETYPE_INO_MASK 0170000 |
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#define FILETYPE_INO_REG 0100000 |
||||
#define FILETYPE_INO_DIRECTORY 0040000 |
||||
#define FILETYPE_INO_SYMLINK 0120000 |
||||
|
||||
/* Bits used as offset in sector */ |
||||
#define DISK_SECTOR_BITS 9 |
||||
|
||||
/* Log2 size of ext2 block in 512 blocks. */ |
||||
#define LOG2_EXT2_BLOCK_SIZE(data) (__le32_to_cpu (data->sblock.log2_block_size) + 1) |
||||
|
||||
/* Log2 size of ext2 block in bytes. */ |
||||
#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu (data->sblock.log2_block_size) + 10) |
||||
|
||||
/* The size of an ext2 block in bytes. */ |
||||
#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) |
||||
|
||||
/* 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; |
||||
}; |
||||
|
||||
/* The ext2 blockgroup. */ |
||||
struct ext2_block_group { |
||||
uint32_t block_id; |
||||
uint32_t inode_id; |
||||
uint32_t inode_table_id; |
||||
uint16_t free_blocks; |
||||
uint16_t free_inodes; |
||||
uint16_t used_dir_cnt; |
||||
uint32_t reserved[3]; |
||||
}; |
||||
|
||||
/* 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 tripple_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; |
||||
}; |
||||
|
||||
|
||||
typedef struct ext2fs_node *ext2fs_node_t; |
||||
|
||||
struct ext2_data *ext2fs_root = NULL; |
||||
ext2fs_node_t ext2fs_file = NULL; |
||||
int symlinknest = 0; |
||||
uint32_t *indir1_block = NULL; |
||||
int indir1_size = 0; |
||||
int indir1_blkno = -1; |
||||
uint32_t *indir2_block = NULL; |
||||
int indir2_size = 0; |
||||
int indir2_blkno = -1; |
||||
static unsigned int inode_size; |
||||
|
||||
|
||||
static int ext2fs_blockgroup |
||||
(struct ext2_data *data, int group, struct ext2_block_group *blkgrp) { |
||||
unsigned int blkno; |
||||
unsigned int blkoff; |
||||
unsigned int desc_per_blk; |
||||
|
||||
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); |
||||
#ifdef DEBUG |
||||
printf ("ext2fs read %d group descriptor (blkno %d blkoff %d)\n", |
||||
group, blkno, blkoff); |
||||
#endif |
||||
return (ext2fs_devread (blkno << LOG2_EXT2_BLOCK_SIZE(data), |
||||
blkoff, sizeof(struct ext2_block_group), (char *)blkgrp)); |
||||
|
||||
} |
||||
|
||||
|
||||
static int ext2fs_read_inode |
||||
(struct ext2_data *data, int ino, struct ext2_inode *inode) { |
||||
struct ext2_block_group blkgrp; |
||||
struct ext2_sblock *sblock = &data->sblock; |
||||
int inodes_per_block; |
||||
int status; |
||||
|
||||
unsigned int blkno; |
||||
unsigned int blkoff; |
||||
|
||||
#ifdef DEBUG |
||||
printf ("ext2fs read inode %d, inode_size %d\n", ino, inode_size); |
||||
#endif |
||||
/* It is easier to calculate if the first inode is 0. */ |
||||
ino--; |
||||
status = ext2fs_blockgroup (data, ino / __le32_to_cpu |
||||
(sblock->inodes_per_group), &blkgrp); |
||||
if (status == 0) { |
||||
return (0); |
||||
} |
||||
|
||||
inodes_per_block = EXT2_BLOCK_SIZE(data) / inode_size; |
||||
|
||||
blkno = __le32_to_cpu (blkgrp.inode_table_id) + |
||||
(ino % __le32_to_cpu (sblock->inodes_per_group)) |
||||
/ inodes_per_block; |
||||
blkoff = (ino % inodes_per_block) * inode_size; |
||||
#ifdef DEBUG |
||||
printf ("ext2fs read inode blkno %d blkoff %d\n", blkno, blkoff); |
||||
#endif |
||||
/* Read the inode. */ |
||||
status = ext2fs_devread (blkno << LOG2_EXT2_BLOCK_SIZE (data), blkoff, |
||||
sizeof (struct ext2_inode), (char *) inode); |
||||
if (status == 0) { |
||||
return (0); |
||||
} |
||||
|
||||
return (1); |
||||
} |
||||
|
||||
|
||||
void ext2fs_free_node (ext2fs_node_t node, ext2fs_node_t currroot) { |
||||
if ((node != &ext2fs_root->diropen) && (node != currroot)) { |
||||
free (node); |
||||
} |
||||
} |
||||
|
||||
|
||||
static int ext2fs_read_block (ext2fs_node_t node, int fileblock) { |
||||
struct ext2_data *data = node->data; |
||||
struct ext2_inode *inode = &node->inode; |
||||
int blknr; |
||||
int blksz = EXT2_BLOCK_SIZE (data); |
||||
int log2_blksz = LOG2_EXT2_BLOCK_SIZE (data); |
||||
int status; |
||||
|
||||
/* 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 (indir1_block == NULL) { |
||||
indir1_block = (uint32_t *) memalign(ARCH_DMA_MINALIGN, |
||||
blksz); |
||||
if (indir1_block == NULL) { |
||||
printf ("** ext2fs read block (indir 1) malloc failed. **\n"); |
||||
return (-1); |
||||
} |
||||
indir1_size = blksz; |
||||
indir1_blkno = -1; |
||||
} |
||||
if (blksz != indir1_size) { |
||||
free (indir1_block); |
||||
indir1_block = NULL; |
||||
indir1_size = 0; |
||||
indir1_blkno = -1; |
||||
indir1_block = (uint32_t *) memalign(ARCH_DMA_MINALIGN, |
||||
blksz); |
||||
if (indir1_block == NULL) { |
||||
printf ("** ext2fs read block (indir 1) malloc failed. **\n"); |
||||
return (-1); |
||||
} |
||||
indir1_size = blksz; |
||||
} |
||||
if ((__le32_to_cpu (inode->b.blocks.indir_block) << |
||||
log2_blksz) != indir1_blkno) { |
||||
status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.indir_block) << log2_blksz, |
||||
0, blksz, |
||||
(char *) indir1_block); |
||||
if (status == 0) { |
||||
printf ("** ext2fs read block (indir 1) failed. **\n"); |
||||
return (0); |
||||
} |
||||
indir1_blkno = |
||||
__le32_to_cpu (inode->b.blocks. |
||||
indir_block) << log2_blksz; |
||||
} |
||||
blknr = __le32_to_cpu (indir1_block |
||||
[fileblock - INDIRECT_BLOCKS]); |
||||
} |
||||
/* Double indirect. */ |
||||
else if (fileblock < |
||||
(INDIRECT_BLOCKS + (blksz / 4 * (blksz / 4 + 1)))) { |
||||
unsigned int perblock = blksz / 4; |
||||
unsigned int rblock = fileblock - (INDIRECT_BLOCKS |
||||
+ blksz / 4); |
||||
|
||||
if (indir1_block == NULL) { |
||||
indir1_block = (uint32_t *) memalign(ARCH_DMA_MINALIGN, |
||||
blksz); |
||||
if (indir1_block == NULL) { |
||||
printf ("** ext2fs read block (indir 2 1) malloc failed. **\n"); |
||||
return (-1); |
||||
} |
||||
indir1_size = blksz; |
||||
indir1_blkno = -1; |
||||
} |
||||
if (blksz != indir1_size) { |
||||
free (indir1_block); |
||||
indir1_block = NULL; |
||||
indir1_size = 0; |
||||
indir1_blkno = -1; |
||||
indir1_block = (uint32_t *) memalign(ARCH_DMA_MINALIGN, |
||||
blksz); |
||||
if (indir1_block == NULL) { |
||||
printf ("** ext2fs read block (indir 2 1) malloc failed. **\n"); |
||||
return (-1); |
||||
} |
||||
indir1_size = blksz; |
||||
} |
||||
if ((__le32_to_cpu (inode->b.blocks.double_indir_block) << |
||||
log2_blksz) != indir1_blkno) { |
||||
status = ext2fs_devread (__le32_to_cpu(inode->b.blocks.double_indir_block) << log2_blksz, |
||||
0, blksz, |
||||
(char *) indir1_block); |
||||
if (status == 0) { |
||||
printf ("** ext2fs read block (indir 2 1) failed. **\n"); |
||||
return (-1); |
||||
} |
||||
indir1_blkno = |
||||
__le32_to_cpu (inode->b.blocks.double_indir_block) << log2_blksz; |
||||
} |
||||
|
||||
if (indir2_block == NULL) { |
||||
indir2_block = (uint32_t *) memalign(ARCH_DMA_MINALIGN, |
||||
blksz); |
||||
if (indir2_block == NULL) { |
||||
printf ("** ext2fs read block (indir 2 2) malloc failed. **\n"); |
||||
return (-1); |
||||
} |
||||
indir2_size = blksz; |
||||
indir2_blkno = -1; |
||||
} |
||||
if (blksz != indir2_size) { |
||||
free (indir2_block); |
||||
indir2_block = NULL; |
||||
indir2_size = 0; |
||||
indir2_blkno = -1; |
||||
indir2_block = (uint32_t *) memalign(ARCH_DMA_MINALIGN, |
||||
blksz); |
||||
if (indir2_block == NULL) { |
||||
printf ("** ext2fs read block (indir 2 2) malloc failed. **\n"); |
||||
return (-1); |
||||
} |
||||
indir2_size = blksz; |
||||
} |
||||
if ((__le32_to_cpu (indir1_block[rblock / perblock]) << |
||||
log2_blksz) != indir2_blkno) { |
||||
status = ext2fs_devread (__le32_to_cpu(indir1_block[rblock / perblock]) << log2_blksz, |
||||
0, blksz, |
||||
(char *) indir2_block); |
||||
if (status == 0) { |
||||
printf ("** ext2fs read block (indir 2 2) failed. **\n"); |
||||
return (-1); |
||||
} |
||||
indir2_blkno = |
||||
__le32_to_cpu (indir1_block[rblock / perblock]) << log2_blksz; |
||||
} |
||||
blknr = __le32_to_cpu (indir2_block[rblock % perblock]); |
||||
} |
||||
/* Tripple indirect. */ |
||||
else { |
||||
printf ("** ext2fs doesn't support tripple indirect blocks. **\n"); |
||||
return (-1); |
||||
} |
||||
#ifdef DEBUG |
||||
printf ("ext2fs_read_block %08x\n", blknr); |
||||
#endif |
||||
return (blknr); |
||||
} |
||||
|
||||
|
||||
int ext2fs_read_file |
||||
(ext2fs_node_t node, int pos, unsigned int len, char *buf) { |
||||
int i; |
||||
int blockcnt; |
||||
int log2blocksize = LOG2_EXT2_BLOCK_SIZE (node->data); |
||||
int blocksize = 1 << (log2blocksize + DISK_SECTOR_BITS); |
||||
unsigned int filesize = __le32_to_cpu(node->inode.size); |
||||
|
||||
/* 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++) { |
||||
int blknr; |
||||
int blockoff = pos % blocksize; |
||||
int blockend = blocksize; |
||||
|
||||
int skipfirst = 0; |
||||
|
||||
blknr = ext2fs_read_block (node, i); |
||||
if (blknr < 0) { |
||||
return (-1); |
||||
} |
||||
|
||||
/* 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; |
||||
} |
||||
|
||||
/* grab middle blocks in one go */ |
||||
if (i != pos / blocksize && i < blockcnt - 1 && blockcnt > 3) { |
||||
int oldblk = blknr; |
||||
int blocknxt = ext2fs_read_block(node, i + 1); |
||||
while (i < blockcnt - 1) { |
||||
if (blocknxt == (oldblk + 1)) { |
||||
oldblk = blocknxt; |
||||
i++; |
||||
} else { |
||||
blocknxt = ext2fs_read_block(node, i); |
||||
break; |
||||
} |
||||
blocknxt = ext2fs_read_block(node, i); |
||||
} |
||||
|
||||
if (oldblk == blknr) |
||||
blockend = blocksize; |
||||
else |
||||
blockend = (1 + blocknxt - blknr) * blocksize; |
||||
} |
||||
|
||||
blknr = blknr << log2blocksize; |
||||
|
||||
/* If the block number is 0 this block is not stored on disk but
|
||||
is zero filled instead. */ |
||||
if (blknr) { |
||||
int status; |
||||
|
||||
status = ext2fs_devread (blknr, skipfirst, blockend, buf); |
||||
if (status == 0) { |
||||
return (-1); |
||||
} |
||||
} else { |
||||
memset (buf, 0, blocksize - skipfirst); |
||||
} |
||||
buf += blockend - skipfirst; |
||||
} |
||||
return (len); |
||||
} |
||||
|
||||
|
||||
static int ext2fs_iterate_dir (ext2fs_node_t dir, char *name, ext2fs_node_t * 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 = ext2fs_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 = ext2fs_read_file (diro, fpos, |
||||
sizeof (struct ext2_dirent), |
||||
(char *) &dirent); |
||||
if (status < 1) { |
||||
return (0); |
||||
} |
||||
if (dirent.namelen != 0) { |
||||
char filename[dirent.namelen + 1]; |
||||
ext2fs_node_t fdiro; |
||||
int type = FILETYPE_UNKNOWN; |
||||
|
||||
status = ext2fs_read_file (diro, |
||||
fpos + sizeof (struct ext2_dirent), |
||||
dirent.namelen, filename); |
||||
if (status < 1) { |
||||
return (0); |
||||
} |
||||
fdiro = malloc (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 { |
||||
/* The filetype can not be read from the dirent, get it from inode */ |
||||
|
||||
status = ext2fs_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 = ext2fs_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 *ext2fs_read_symlink (ext2fs_node_t node) { |
||||
char *symlink; |
||||
struct ext2fs_node *diro = node; |
||||
int status; |
||||
|
||||
if (!diro->inode_read) { |
||||
status = ext2fs_read_inode (diro->data, diro->ino, |
||||
&diro->inode); |
||||
if (status == 0) { |
||||
return (0); |
||||
} |
||||
} |
||||
symlink = malloc (__le32_to_cpu (diro->inode.size) + 1); |
||||
if (!symlink) { |
||||
return (0); |
||||
} |
||||
/* If the filesize of the symlink is bigger than
|
||||
60 the symlink is stored in a separate block, |
||||
otherwise it is stored in the inode. */ |
||||
if (__le32_to_cpu (diro->inode.size) <= 60) { |
||||
strncpy (symlink, diro->inode.b.symlink, |
||||
__le32_to_cpu (diro->inode.size)); |
||||
} else { |
||||
status = ext2fs_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); |
||||
} |
||||
|
||||
|
||||
int ext2fs_find_file1 |
||||
(const char *currpath, |
||||
ext2fs_node_t currroot, ext2fs_node_t * currfound, int *foundtype) { |
||||
char fpath[strlen (currpath) + 1]; |
||||
char *name = fpath; |
||||
char *next; |
||||
int status; |
||||
int type = FILETYPE_DIRECTORY; |
||||
ext2fs_node_t currnode = currroot; |
||||
ext2fs_node_t 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'; |
||||
} |
||||
} |
||||
|
||||
/* At this point it is expected that the current node is a directory, check if this is true. */ |
||||
if (type != FILETYPE_DIRECTORY) { |
||||
ext2fs_free_node (currnode, currroot); |
||||
return (0); |
||||
} |
||||
|
||||
oldnode = currnode; |
||||
|
||||
/* Iterate over the directory. */ |
||||
found = ext2fs_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) { |
||||
ext2fs_free_node (currnode, currroot); |
||||
ext2fs_free_node (oldnode, currroot); |
||||
return (0); |
||||
} |
||||
|
||||
symlink = ext2fs_read_symlink (currnode); |
||||
ext2fs_free_node (currnode, currroot); |
||||
|
||||
if (!symlink) { |
||||
ext2fs_free_node (oldnode, currroot); |
||||
return (0); |
||||
} |
||||
#ifdef DEBUG |
||||
printf ("Got symlink >%s<\n", symlink); |
||||
#endif /* of DEBUG */ |
||||
/* The symlink is an absolute path, go back to the root inode. */ |
||||
if (symlink[0] == '/') { |
||||
ext2fs_free_node (oldnode, currroot); |
||||
oldnode = &ext2fs_root->diropen; |
||||
} |
||||
|
||||
/* Lookup the node the symlink points to. */ |
||||
status = ext2fs_find_file1 (symlink, oldnode, |
||||
&currnode, &type); |
||||
|
||||
free (symlink); |
||||
|
||||
if (status == 0) { |
||||
ext2fs_free_node (oldnode, currroot); |
||||
return (0); |
||||
} |
||||
} |
||||
|
||||
ext2fs_free_node (oldnode, currroot); |
||||
|
||||
/* Found the node! */ |
||||
if (!next || *next == '\0') { |
||||
*currfound = currnode; |
||||
*foundtype = type; |
||||
return (1); |
||||
} |
||||
name = next; |
||||
} |
||||
return (-1); |
||||
} |
||||
|
||||
|
||||
int ext2fs_find_file |
||||
(const char *path, |
||||
ext2fs_node_t rootnode, ext2fs_node_t * foundnode, int expecttype) { |
||||
int status; |
||||
int foundtype = FILETYPE_DIRECTORY; |
||||
|
||||
|
||||
symlinknest = 0; |
||||
if (!path) { |
||||
return (0); |
||||
} |
||||
|
||||
status = ext2fs_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 ext2fs_ls (const char *dirname) { |
||||
ext2fs_node_t dirnode; |
||||
int status; |
||||
|
||||
if (ext2fs_root == NULL) { |
||||
return (0); |
||||
} |
||||
|
||||
status = ext2fs_find_file (dirname, &ext2fs_root->diropen, &dirnode, |
||||
FILETYPE_DIRECTORY); |
||||
if (status != 1) { |
||||
printf ("** Can not find directory. **\n"); |
||||
return (1); |
||||
} |
||||
ext2fs_iterate_dir (dirnode, NULL, NULL, NULL); |
||||
ext2fs_free_node (dirnode, &ext2fs_root->diropen); |
||||
return (0); |
||||
} |
||||
|
||||
|
||||
int ext2fs_open (const char *filename) { |
||||
ext2fs_node_t fdiro = NULL; |
||||
int status; |
||||
int len; |
||||
|
||||
if (ext2fs_root == NULL) { |
||||
return (-1); |
||||
} |
||||
ext2fs_file = NULL; |
||||
status = ext2fs_find_file (filename, &ext2fs_root->diropen, &fdiro, |
||||
FILETYPE_REG); |
||||
if (status == 0) { |
||||
goto fail; |
||||
} |
||||
if (!fdiro->inode_read) { |
||||
status = ext2fs_read_inode (fdiro->data, fdiro->ino, |
||||
&fdiro->inode); |
||||
if (status == 0) { |
||||
goto fail; |
||||
} |
||||
} |
||||
len = __le32_to_cpu (fdiro->inode.size); |
||||
ext2fs_file = fdiro; |
||||
return (len); |
||||
|
||||
fail: |
||||
ext2fs_free_node (fdiro, &ext2fs_root->diropen); |
||||
return (-1); |
||||
} |
||||
|
||||
|
||||
int ext2fs_close (void |
||||
) { |
||||
if ((ext2fs_file != NULL) && (ext2fs_root != NULL)) { |
||||
ext2fs_free_node (ext2fs_file, &ext2fs_root->diropen); |
||||
ext2fs_file = NULL; |
||||
} |
||||
if (ext2fs_root != NULL) { |
||||
free (ext2fs_root); |
||||
ext2fs_root = NULL; |
||||
} |
||||
if (indir1_block != NULL) { |
||||
free (indir1_block); |
||||
indir1_block = NULL; |
||||
indir1_size = 0; |
||||
indir1_blkno = -1; |
||||
} |
||||
if (indir2_block != NULL) { |
||||
free (indir2_block); |
||||
indir2_block = NULL; |
||||
indir2_size = 0; |
||||
indir2_blkno = -1; |
||||
} |
||||
return (0); |
||||
} |
||||
|
||||
|
||||
int ext2fs_read (char *buf, unsigned len) { |
||||
int status; |
||||
|
||||
if (ext2fs_root == NULL) { |
||||
return (0); |
||||
} |
||||
|
||||
if (ext2fs_file == NULL) { |
||||
return (0); |
||||
} |
||||
|
||||
status = ext2fs_read_file (ext2fs_file, 0, len, buf); |
||||
return (status); |
||||
} |
||||
|
||||
|
||||
int ext2fs_mount (unsigned part_length) { |
||||
struct ext2_data *data; |
||||
int status; |
||||
|
||||
data = malloc (sizeof (struct ext2_data)); |
||||
if (!data) { |
||||
return (0); |
||||
} |
||||
/* Read the superblock. */ |
||||
status = ext2fs_devread (1 * 2, 0, sizeof (struct ext2_sblock), |
||||
(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)) { |
||||
inode_size = 128; |
||||
} else { |
||||
inode_size = __le16_to_cpu(data->sblock.inode_size); |
||||
} |
||||
#ifdef DEBUG |
||||
printf("EXT2 rev %d, inode_size %d\n", |
||||
__le32_to_cpu(data->sblock.revision_level), inode_size); |
||||
#endif |
||||
data->diropen.data = data; |
||||
data->diropen.ino = 2; |
||||
data->diropen.inode_read = 1; |
||||
data->inode = &data->diropen.inode; |
||||
|
||||
status = ext2fs_read_inode (data, 2, data->inode); |
||||
if (status == 0) { |
||||
goto fail; |
||||
} |
||||
|
||||
ext2fs_root = data; |
||||
|
||||
return (1); |
||||
|
||||
fail: |
||||
printf ("Failed to mount ext2 filesystem...\n"); |
||||
free (data); |
||||
ext2fs_root = NULL; |
||||
return (0); |
||||
} |
@ -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> |
||||
* |
||||
* 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> |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License as published by |
||||
* the Free Software Foundation; either version 2 of the License, or |
||||
* (at your option) any later version. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
||||
* |
||||
*/ |
||||
|
||||
/*
|
||||
* 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 <ext_common.h> |
||||
|
||||
static block_dev_desc_t *ext4fs_block_dev_desc; |
||||
static disk_partition_t part_info; |
||||
|
||||
int ext4fs_set_blk_dev(block_dev_desc_t *rbdd, int part) |
||||
{ |
||||
ext4fs_block_dev_desc = rbdd; |
||||
|
||||
if (part == 0) { |
||||
/* disk doesn't use partition table */ |
||||
part_info.start = 0; |
||||
part_info.size = rbdd->lba; |
||||
part_info.blksz = rbdd->blksz; |
||||
} else { |
||||
if (get_partition_info(ext4fs_block_dev_desc, |
||||
part, &part_info)) |
||||
return 0; |
||||
} |
||||
return part_info.size; |
||||
} |
||||
|
||||
int ext4fs_devread(int sector, int byte_offset, int byte_len, char *buf) |
||||
{ |
||||
char sec_buf[SECTOR_SIZE]; |
||||
unsigned block_len; |
||||
|
||||
/* Check partition boundaries */ |
||||
if ((sector < 0) |
||||
|| ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS)) >= |
||||
part_info.size)) { |
||||
printf("%s read outside partition %d\n", __func__, sector); |
||||
return 0; |
||||
} |
||||
|
||||
/* Get the read to the beginning of a partition */ |
||||
sector += byte_offset >> SECTOR_BITS; |
||||
byte_offset &= SECTOR_SIZE - 1; |
||||
|
||||
debug(" <%d, %d, %d>\n", sector, byte_offset, byte_len); |
||||
|
||||
if (ext4fs_block_dev_desc == NULL) { |
||||
printf("** Invalid Block Device Descriptor (NULL)\n"); |
||||
return 0; |
||||
} |
||||
|
||||
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(SECTOR_SIZE - byte_offset, byte_len)); |
||||
buf += min(SECTOR_SIZE - byte_offset, byte_len); |
||||
byte_len -= min(SECTOR_SIZE - byte_offset, byte_len); |
||||
sector++; |
||||
} |
||||
|
||||
if (byte_len == 0) |
||||
return 1; |
||||
|
||||
/* read sector aligned part */ |
||||
block_len = byte_len & ~(SECTOR_SIZE - 1); |
||||
|
||||
if (block_len == 0) { |
||||
u8 p[SECTOR_SIZE]; |
||||
|
||||
block_len = SECTOR_SIZE; |
||||
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 / SECTOR_SIZE, |
||||
(unsigned long *) buf) != |
||||
block_len / SECTOR_SIZE) { |
||||
printf(" ** %s read error - block\n", __func__); |
||||
return 0; |
||||
} |
||||
block_len = byte_len & ~(SECTOR_SIZE - 1); |
||||
buf += block_len; |
||||
byte_len -= block_len; |
||||
sector += block_len / SECTOR_SIZE; |
||||
|
||||
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; |
||||
} |
@ -0,0 +1,875 @@ |
||||
/*
|
||||
* (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. |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License as published by |
||||
* the Free Software Foundation; either version 2 of the License, or |
||||
* (at your option) any later version. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
||||
*/ |
||||
|
||||
#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; |
||||
|
||||
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 (le32_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 >= le32_to_cpu(ext_block->eh_entries)) |
||||
break; |
||||
} while (fileblock > le32_to_cpu(index[i].ei_block)); |
||||
|
||||
if (--i < 0) |
||||
return 0; |
||||
|
||||
block = le32_to_cpu(index[i].ei_leaf_hi); |
||||
block = (block << 32) + le32_to_cpu(index[i].ei_leaf_lo); |
||||
|
||||
if (ext4fs_devread(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; |
||||
|
||||
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(blkno << LOG2_EXT2_BLOCK_SIZE(data), |
||||
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 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(blkno << LOG2_EXT2_BLOCK_SIZE(data), 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_EXT2_BLOCK_SIZE(ext4fs_root); |
||||
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 >= le32_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 >= le32_to_cpu(extent[i].ee_len)) { |
||||
free(buf); |
||||
return 0; |
||||
} |
||||
|
||||
start = le32_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(__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(__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(__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 |
||||
(__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(__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(__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("ext4fs_read_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(sizeof(struct ext2_data)); |
||||
if (!data) |
||||
return 0; |
||||
|
||||
/* Read the superblock. */ |
||||
status = ext4fs_devread(1 * 2, 0, sizeof(struct ext2_sblock), |
||||
(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; |
||||
} |
@ -0,0 +1,63 @@ |
||||
/*
|
||||
* (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. |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License as published by |
||||
* the Free Software Foundation; either version 2 of the License, or |
||||
* (at your option) any later version. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
||||
*/ |
||||
|
||||
#ifndef __EXT4_COMMON__ |
||||
#define __EXT4_COMMON__ |
||||
#include <ext_common.h> |
||||
#include <ext4fs.h> |
||||
#include <malloc.h> |
||||
#include <asm/errno.h> |
||||
|
||||
#define YES 1 |
||||
#define NO 0 |
||||
#define TRUE 1 |
||||
#define FALSE 0 |
||||
#define RECOVER 1 |
||||
#define SCAN 0 |
||||
|
||||
#define S_IFLNK 0120000 /* symbolic link */ |
||||
#define BLOCK_NO_ONE 1 |
||||
#define SUPERBLOCK_SECTOR 2 |
||||
#define SUPERBLOCK_SIZE 1024 |
||||
#define F_FILE 1 |
||||
|
||||
#define zalloc(size) calloc(1, size) |
||||
|
||||
extern unsigned long part_offset; |
||||
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); |
||||
#endif |
@ -0,0 +1,228 @@ |
||||
/*
|
||||
* (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. |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License as published by |
||||
* the Free Software Foundation; either version 2 of the License, or |
||||
* (at your option) any later version. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
||||
*/ |
||||
|
||||
#include <common.h> |
||||
#include <malloc.h> |
||||
#include <ext_common.h> |
||||
#include <ext4fs.h> |
||||
#include <linux/stat.h> |
||||
#include <linux/time.h> |
||||
#include <asm/byteorder.h> |
||||
#include "ext4_common.h" |
||||
|
||||
int ext4fs_symlinknest; |
||||
block_dev_desc_t *ext4_dev_desc; |
||||
|
||||
struct ext_filesystem *get_fs(void) |
||||
{ |
||||
if (ext4_dev_desc == NULL || ext4_dev_desc->priv == NULL) |
||||
printf("Invalid Input Arguments %s\n", __func__); |
||||
|
||||
return ext4_dev_desc->priv; |
||||
} |
||||
|
||||
int init_fs(block_dev_desc_t *dev_desc) |
||||
{ |
||||
struct ext_filesystem *fs; |
||||
if (dev_desc == NULL) { |
||||
printf("Invalid Input Arguments %s\n", __func__); |
||||
return -EINVAL; |
||||
} |
||||
|
||||
fs = zalloc(sizeof(struct ext_filesystem)); |
||||
if (fs == NULL) { |
||||
printf("malloc failed: %s\n", __func__); |
||||
return -ENOMEM; |
||||
} |
||||
|
||||
fs->dev_desc = dev_desc; |
||||
dev_desc->priv = fs; |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
void deinit_fs(block_dev_desc_t *dev_desc) |
||||
{ |
||||
if (dev_desc == NULL) { |
||||
printf("Invalid Input Arguments %s\n", __func__); |
||||
return; |
||||
} |
||||
free(dev_desc->priv); |
||||
dev_desc->priv = NULL; |
||||
} |
||||
|
||||
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) |
||||
{ |
||||
int i; |
||||
int blockcnt; |
||||
int log2blocksize = LOG2_EXT2_BLOCK_SIZE(node->data); |
||||
int blocksize = 1 << (log2blocksize + DISK_SECTOR_BITS); |
||||
unsigned int filesize = __le32_to_cpu(node->inode.size); |
||||
int previous_block_number = -1; |
||||
int delayed_start = 0; |
||||
int delayed_extent = 0; |
||||
int delayed_skipfirst = 0; |
||||
int 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++) { |
||||
int 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 << log2blocksize; |
||||
|
||||
/* 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 >> SECTOR_BITS; |
||||
} 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 >> SECTOR_BITS); |
||||
} |
||||
} else { |
||||
previous_block_number = blknr; |
||||
delayed_start = blknr; |
||||
delayed_extent = blockend; |
||||
delayed_skipfirst = skipfirst; |
||||
delayed_buf = buf; |
||||
delayed_next = blknr + |
||||
(blockend >> SECTOR_BITS); |
||||
} |
||||
} 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); |
||||
} |
@ -1,81 +0,0 @@ |
||||
/*
|
||||
* GRUB -- GRand Unified Bootloader |
||||
* Copyright (C) 2000, 2001 Free Software Foundation, Inc. |
||||
* |
||||
* (C) Copyright 2003 Sysgo Real-Time Solutions, AG <www.elinos.com> |
||||
* Pavel Bartusek <pba@sysgo.de> |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License as published by |
||||
* the Free Software Foundation; either version 2 of the License, or |
||||
* (at your option) any later version. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
||||
*/ |
||||
|
||||
/* An implementation for the Ext2FS filesystem ported from GRUB.
|
||||
* Some parts of this code (mainly the structures and defines) are |
||||
* from the original ext2 fs code, as found in the linux kernel. |
||||
*/ |
||||
|
||||
|
||||
#define SECTOR_SIZE 0x200 |
||||
#define SECTOR_BITS 9 |
||||
|
||||
/* Error codes */ |
||||
typedef enum |
||||
{ |
||||
ERR_NONE = 0, |
||||
ERR_BAD_FILENAME, |
||||
ERR_BAD_FILETYPE, |
||||
ERR_BAD_GZIP_DATA, |
||||
ERR_BAD_GZIP_HEADER, |
||||
ERR_BAD_PART_TABLE, |
||||
ERR_BAD_VERSION, |
||||
ERR_BELOW_1MB, |
||||
ERR_BOOT_COMMAND, |
||||
ERR_BOOT_FAILURE, |
||||
ERR_BOOT_FEATURES, |
||||
ERR_DEV_FORMAT, |
||||
ERR_DEV_VALUES, |
||||
ERR_EXEC_FORMAT, |
||||
ERR_FILELENGTH, |
||||
ERR_FILE_NOT_FOUND, |
||||
ERR_FSYS_CORRUPT, |
||||
ERR_FSYS_MOUNT, |
||||
ERR_GEOM, |
||||
ERR_NEED_LX_KERNEL, |
||||
ERR_NEED_MB_KERNEL, |
||||
ERR_NO_DISK, |
||||
ERR_NO_PART, |
||||
ERR_NUMBER_PARSING, |
||||
ERR_OUTSIDE_PART, |
||||
ERR_READ, |
||||
ERR_SYMLINK_LOOP, |
||||
ERR_UNRECOGNIZED, |
||||
ERR_WONT_FIT, |
||||
ERR_WRITE, |
||||
ERR_BAD_ARGUMENT, |
||||
ERR_UNALIGNED, |
||||
ERR_PRIVILEGED, |
||||
ERR_DEV_NEED_INIT, |
||||
ERR_NO_DISK_SPACE, |
||||
ERR_NUMBER_OVERFLOW, |
||||
|
||||
MAX_ERR_NUM |
||||
} ext2fs_error_t; |
||||
|
||||
|
||||
extern int ext2fs_set_blk_dev(block_dev_desc_t *rbdd, int part); |
||||
extern int ext2fs_ls (const char *dirname); |
||||
extern int ext2fs_open (const char *filename); |
||||
extern int ext2fs_read (char *buf, unsigned len); |
||||
extern int ext2fs_mount (unsigned part_length); |
||||
extern int ext2fs_close(void); |
@ -0,0 +1,132 @@ |
||||
/*
|
||||
* (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 *gd; |
||||
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 block_dev_desc_t *ext4_dev_desc; |
||||
extern struct ext2_data *ext4fs_root; |
||||
extern struct ext2fs_node *ext4fs_file; |
||||
|
||||
struct ext_filesystem *get_fs(void); |
||||
int init_fs(block_dev_desc_t *dev_desc); |
||||
void deinit_fs(block_dev_desc_t *dev_desc); |
||||
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(int sector, int byte_offset, int byte_len, char *buf); |
||||
int ext4fs_set_blk_dev(block_dev_desc_t *rbdd, int part); |
||||
long int read_allocated_block(struct ext2_inode *inode, int fileblock); |
||||
#endif |
@ -0,0 +1,197 @@ |
||||
/*
|
||||
* (C) Copyright 2011 - 2012 Samsung Electronics |
||||
* EXT4 filesystem implementation in Uboot by |
||||
* Uma Shankar <uma.shankar@samsung.com> |
||||
* Manjunatha C Achar <a.manjunatha@samsung.com> |
||||
* |
||||
* Data structures and headers for ext4 support have been taken from |
||||
* ext2 ls load support in Uboot |
||||
* |
||||
* (C) Copyright 2004 |
||||
* esd gmbh <www.esd-electronics.com> |
||||
* Reinhard Arlt <reinhard.arlt@esd-electronics.com> |
||||
* |
||||
* based on code from grub2 fs/ext2.c and fs/fshelp.c by |
||||
* GRUB -- GRand Unified Bootloader |
||||
* Copyright (C) 2003, 2004 Free Software Foundation, Inc. |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License as published by |
||||
* the Free Software Foundation; either version 2 of the License, or |
||||
* (at your option) any later version. |
||||
* |
||||
* This program is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
||||
* GNU General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU General Public License |
||||
* along with this program; if not, write to the Free Software |
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
||||
*/ |
||||
|
||||
#ifndef __EXT_COMMON__ |
||||
#define __EXT_COMMON__ |
||||
#include <command.h> |
||||
#define SECTOR_SIZE 0x200 |
||||
#define SECTOR_BITS 9 |
||||
|
||||
/* Magic value used to identify an ext2 filesystem. */ |
||||
#define EXT2_MAGIC 0xEF53 |
||||
/* Amount of indirect blocks in an inode. */ |
||||
#define INDIRECT_BLOCKS 12 |
||||
/* Maximum lenght of a pathname. */ |
||||
#define EXT2_PATH_MAX 4096 |
||||
/* Maximum nesting of symlinks, used to prevent a loop. */ |
||||
#define EXT2_MAX_SYMLINKCNT 8 |
||||
|
||||
/* Filetype used in directory entry. */ |
||||
#define FILETYPE_UNKNOWN 0 |
||||
#define FILETYPE_REG 1 |
||||
#define FILETYPE_DIRECTORY 2 |
||||
#define FILETYPE_SYMLINK 7 |
||||
|
||||
/* Filetype information as used in inodes. */ |
||||
#define FILETYPE_INO_MASK 0170000 |
||||
#define FILETYPE_INO_REG 0100000 |
||||
#define FILETYPE_INO_DIRECTORY 0040000 |
||||
#define FILETYPE_INO_SYMLINK 0120000 |
||||
#define EXT2_ROOT_INO 2 /* Root inode */ |
||||
|
||||
/* Bits used as offset in sector */ |
||||
#define DISK_SECTOR_BITS 9 |
||||
/* The size of an ext2 block in bytes. */ |
||||
#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data)) |
||||
|
||||
/* Log2 size of ext2 block in 512 blocks. */ |
||||
#define LOG2_EXT2_BLOCK_SIZE(data) (__le32_to_cpu \ |
||||
(data->sblock.log2_block_size) + 1) |
||||
|
||||
/* Log2 size of ext2 block in bytes. */ |
||||
#define LOG2_BLOCK_SIZE(data) (__le32_to_cpu \ |
||||
(data->sblock.log2_block_size) + 10) |
||||
#define INODE_SIZE_FILESYSTEM(data) (__le32_to_cpu \ |
||||
(data->sblock.inode_size)) |
||||
|
||||
#define EXT2_FT_DIR 2 |
||||
#define SUCCESS 1 |
||||
|
||||
/* Macro-instructions used to manage several block sizes */ |
||||
#define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ |
||||
#define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ |
||||
#define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) |
||||
#define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) |
||||
|
||||
/* The ext2 superblock. */ |
||||
struct ext2_sblock { |
||||
uint32_t total_inodes; |
||||
uint32_t total_blocks; |
||||
uint32_t reserved_blocks; |
||||
uint32_t free_blocks; |
||||
uint32_t free_inodes; |
||||
uint32_t first_data_block; |
||||
uint32_t log2_block_size; |
||||
uint32_t log2_fragment_size; |
||||
uint32_t blocks_per_group; |
||||
uint32_t fragments_per_group; |
||||
uint32_t inodes_per_group; |
||||
uint32_t mtime; |
||||
uint32_t utime; |
||||
uint16_t mnt_count; |
||||
uint16_t max_mnt_count; |
||||
uint16_t magic; |
||||
uint16_t fs_state; |
||||
uint16_t error_handling; |
||||
uint16_t minor_revision_level; |
||||
uint32_t lastcheck; |
||||
uint32_t checkinterval; |
||||
uint32_t creator_os; |
||||
uint32_t revision_level; |
||||
uint16_t uid_reserved; |
||||
uint16_t gid_reserved; |
||||
uint32_t first_inode; |
||||
uint16_t inode_size; |
||||
uint16_t block_group_number; |
||||
uint32_t feature_compatibility; |
||||
uint32_t feature_incompat; |
||||
uint32_t feature_ro_compat; |
||||
uint32_t unique_id[4]; |
||||
char volume_name[16]; |
||||
char last_mounted_on[64]; |
||||
uint32_t compression_info; |
||||
}; |
||||
|
||||
struct ext2_block_group { |
||||
__u32 block_id; /* Blocks bitmap block */ |
||||
__u32 inode_id; /* Inodes bitmap block */ |
||||
__u32 inode_table_id; /* Inodes table block */ |
||||
__u16 free_blocks; /* Free blocks count */ |
||||
__u16 free_inodes; /* Free inodes count */ |
||||
__u16 used_dir_cnt; /* Directories count */ |
||||
__u16 bg_flags; |
||||
__u32 bg_reserved[2]; |
||||
__u16 bg_itable_unused; /* Unused inodes count */ |
||||
__u16 bg_checksum; /* crc16(s_uuid+grouo_num+group_desc)*/ |
||||
}; |
||||
|
||||
/* The ext2 inode. */ |
||||
struct ext2_inode { |
||||
uint16_t mode; |
||||
uint16_t uid; |
||||
uint32_t size; |
||||
uint32_t atime; |
||||
uint32_t ctime; |
||||
uint32_t mtime; |
||||
uint32_t dtime; |
||||
uint16_t gid; |
||||
uint16_t nlinks; |
||||
uint32_t blockcnt; /* Blocks of 512 bytes!! */ |
||||
uint32_t flags; |
||||
uint32_t osd1; |
||||
union { |
||||
struct datablocks { |
||||
uint32_t dir_blocks[INDIRECT_BLOCKS]; |
||||
uint32_t indir_block; |
||||
uint32_t double_indir_block; |
||||
uint32_t triple_indir_block; |
||||
} blocks; |
||||
char symlink[60]; |
||||
} b; |
||||
uint32_t version; |
||||
uint32_t acl; |
||||
uint32_t dir_acl; |
||||
uint32_t fragment_addr; |
||||
uint32_t osd2[3]; |
||||
}; |
||||
|
||||
/* The header of an ext2 directory entry. */ |
||||
struct ext2_dirent { |
||||
uint32_t inode; |
||||
uint16_t direntlen; |
||||
uint8_t namelen; |
||||
uint8_t filetype; |
||||
}; |
||||
|
||||
struct ext2fs_node { |
||||
struct ext2_data *data; |
||||
struct ext2_inode inode; |
||||
int ino; |
||||
int inode_read; |
||||
}; |
||||
|
||||
/* Information about a "mounted" ext2 filesystem. */ |
||||
struct ext2_data { |
||||
struct ext2_sblock sblock; |
||||
struct ext2_inode *inode; |
||||
struct ext2fs_node diropen; |
||||
}; |
||||
|
||||
int do_ext2ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); |
||||
int do_ext2load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); |
||||
int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc, |
||||
char *const argv[]); |
||||
int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); |
||||
int do_ext_load(cmd_tbl_t *cmdtp, int flag, int argc, |
||||
char *const argv[]); |
||||
int do_ext_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[]); |
||||
#endif |
Loading…
Reference in new issue