[patch] Add flash_eraseall from mtd-utils
Sebastian Andrzej Siewior
bigeasy at linutronix.de
Fri Feb 13 19:29:32 UTC 2009
This is the result after converting mtd-utils' flash_eraseall to BB.
The functionality given by this patch almost the same except that this
one does not support long options.
I needed this tool a system which does not have a lot of flash for RFS
and merging this into BB as the only way out.
Signed-off-by: Benedigt Spranger <b.spranger at linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
Index: busybox/include/applets.h
===================================================================
--- busybox.orig/include/applets.h
+++ busybox/include/applets.h
@@ -155,6 +155,7 @@ USE_FDISK(APPLET(fdisk, _BB_DIR_SBIN, _B
USE_FEATURE_GREP_FGREP_ALIAS(APPLET_ODDNAME(fgrep, grep, _BB_DIR_BIN, _BB_SUID_NEVER, fgrep))
USE_FIND(APPLET_NOEXEC(find, find, _BB_DIR_USR_BIN, _BB_SUID_NEVER, find))
USE_FINDFS(APPLET(findfs, _BB_DIR_SBIN, _BB_SUID_MAYBE))
+USE_FLASH_ERASEALL(APPLET_ODDNAME(flash_eraseall, flash_eraseall, _BB_DIR_USR_SBIN, _BB_SUID_NEVER, flash_eraseall))
USE_FOLD(APPLET(fold, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_FREE(APPLET(free, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
USE_FREERAMDISK(APPLET(freeramdisk, _BB_DIR_SBIN, _BB_SUID_NEVER))
Index: busybox/include/usage.h
===================================================================
--- busybox.orig/include/usage.h
+++ busybox/include/usage.h
@@ -1217,6 +1217,12 @@
"$ find / -name passwd\n" \
"/etc/passwd\n"
+#define flash_eraseall_trivial_usage \
+ "[-jq] MTD_DEVICE"
+#define flash_eraseall_full_usage "\n\n" \
+ " -j format the device for jffs2\n" \
+ " -q don't display progress messages"
+
#define fold_trivial_usage \
"[-bs] [-w WIDTH] [FILE]"
#define fold_full_usage "\n\n" \
Index: busybox/miscutils/Config.in
===================================================================
--- busybox.orig/miscutils/Config.in
+++ busybox/miscutils/Config.in
@@ -245,6 +245,13 @@ config FBSPLASH
"NN" (ASCII decimal number) - percentage to show on progress bar
"exit" - well you guessed it
+config FLASH_ERASEALL
+ bool "flash_eraseall"
+ default n
+ help
+ The flash_eraseall binary from mtd-utils as of git head c4c6a59eb.
+ This little utility can be used to erase the whole mtd device.
+
config IONICE
bool "ionice"
default n
Index: busybox/miscutils/Kbuild
===================================================================
--- busybox.orig/miscutils/Kbuild
+++ busybox/miscutils/Kbuild
@@ -16,6 +16,7 @@ lib-$(CONFIG_DEVFSD) += devfsd.o
lib-$(CONFIG_DEVMEM) += devmem.o
lib-$(CONFIG_EJECT) += eject.o
lib-$(CONFIG_FBSPLASH) += fbsplash.o
+lib-$(CONFIG_FLASH_ERASEALL) += flash_eraseall.o
lib-$(CONFIG_IONICE) += ionice.o
lib-$(CONFIG_HDPARM) += hdparm.o
lib-$(CONFIG_INOTIFYD) += inotifyd.o
Index: busybox/miscutils/flash_eraseall.c
===================================================================
--- /dev/null
+++ busybox/miscutils/flash_eraseall.c
@@ -0,0 +1,198 @@
+/* eraseall.c -- erase the whole of a MTD device
+
+ Ported to busybox from mtd-utils.
+
+ Copyright (C) 2000 Arcom Control System Ltd
+
+ Renamed to flash_eraseall.c
+
+ 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include "libbb.h"
+
+#include <mtd/mtd-user.h>
+#include <mtd/jffs2-user.h>
+
+#define OPTION_J (1 << 0)
+#define OPTION_Q (1 << 1)
+
+static struct jffs2_unknown_node cleanmarker;
+int target_endian = __BYTE_ORDER;
+static uint32_t *crc32_table;
+
+static uint32_t crc32(uint32_t val, const void *ss, int len)
+{
+ const unsigned char *s = ss;
+ while (--len >= 0)
+ val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8);
+ return val;
+}
+
+static void show_progress (mtd_info_t *meminfo, erase_info_t *erase)
+{
+ printf("\rErasing %d Kibyte @ %x -- %2llu %% complete.",
+ meminfo->erasesize / 1024, erase->start,
+ (unsigned long long) erase->start * 100 / meminfo->size);
+ fflush(stdout);
+}
+
+int flash_eraseall_main(int argc, char **argv);
+int flash_eraseall_main(int argc, char **argv)
+{
+ int quiet;
+ int jffs2;
+ mtd_info_t meminfo;
+ int fd, clmpos = 0, clmlen = 8;
+ erase_info_t erase;
+ struct stat st;
+ int isNAND, bbtest = 1;
+ unsigned int flags;
+ char *mtd_name;
+
+ if (argc < 2) {
+ bb_show_usage();
+ }
+
+ flags = getopt32(argv, "jq");
+ jffs2 = flags & OPTION_J;
+ quiet = flags & OPTION_Q;
+
+ mtd_name = *(argv + optind);
+
+ xstat(mtd_name, &st);
+ if (!S_ISCHR(st.st_mode)) {
+ bb_error_msg_and_die("%s: not a char device", mtd_name);
+ }
+
+ fd = xopen(mtd_name, O_RDWR);
+
+ xioctl(fd, MEMGETINFO, &meminfo);
+
+ erase.length = meminfo.erasesize;
+ isNAND = meminfo.type == MTD_NANDFLASH ? 1 : 0;
+
+ if (jffs2) {
+ crc32_table = crc32_filltable(NULL, 0);
+
+ cleanmarker.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK);
+ cleanmarker.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER);
+ if (!isNAND)
+ cleanmarker.totlen = cpu_to_je32 (sizeof (struct jffs2_unknown_node));
+ else {
+ struct nand_oobinfo oobinfo;
+
+ xioctl(fd, MEMGETOOBSEL, &oobinfo);
+
+ /* Check for autoplacement */
+ if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
+ /* Get the position of the free bytes */
+ if (!oobinfo.oobfree[0][1]) {
+ fprintf (stderr, " Eeep. Autoplacement selected and no empty space in oob\n");
+ return 1;
+ }
+ clmpos = oobinfo.oobfree[0][0];
+ clmlen = oobinfo.oobfree[0][1];
+ if (clmlen > 8)
+ clmlen = 8;
+ } else {
+ /* Legacy mode */
+ switch (meminfo.oobsize) {
+ case 8:
+ clmpos = 6;
+ clmlen = 2;
+ break;
+ case 16:
+ clmpos = 8;
+ clmlen = 8;
+ break;
+ case 64:
+ clmpos = 16;
+ clmlen = 8;
+ break;
+ }
+ }
+ cleanmarker.totlen = cpu_to_je32(8);
+ }
+
+ cleanmarker.hdr_crc = cpu_to_je32 (crc32 (0, &cleanmarker, sizeof (struct jffs2_unknown_node) - 4));
+ }
+
+ for (erase.start = 0; erase.start < meminfo.size;
+ erase.start += meminfo.erasesize) {
+ if (bbtest) {
+ int ret;
+
+ loff_t offset = erase.start;
+ ret = ioctl(fd, MEMGETBADBLOCK, &offset);
+ if (ret > 0) {
+ if (!quiet)
+ printf("\nSkipping bad block at 0x%08x\n", erase.start);
+ continue;
+ } else if (ret < 0) {
+ /* Black block table is not available on certain flash
+ * types e.g. NOR
+ */
+ if (errno == EOPNOTSUPP) {
+ bbtest = 0;
+ if (isNAND) {
+ fprintf(stderr, "%s: %s: Bad block check not available\n",
+ argv[0], mtd_name);
+ return 1;
+ }
+ } else {
+ fprintf(stderr, "\n%s: %s: MTD get bad block failed: %s\n",
+ argv[0], mtd_name, strerror(errno));
+ return 1;
+ }
+ }
+ }
+
+ if (!quiet)
+ show_progress(&meminfo, &erase);
+
+ xioctl(fd, MEMERASE, &erase);
+
+ /* format for JFFS2 ? */
+ if (!jffs2)
+ continue;
+
+ /* write cleanmarker */
+ if (isNAND) {
+ struct mtd_oob_buf oob;
+ oob.ptr = (unsigned char *) &cleanmarker;
+ oob.start = erase.start + clmpos;
+ oob.length = clmlen;
+ xioctl (fd, MEMWRITEOOB, &oob);
+ } else {
+ if (lseek (fd, erase.start, SEEK_SET) < 0) {
+ fprintf(stderr, "\n%s: MTD lseek failure: %s\n", mtd_name, strerror(errno));
+ continue;
+ }
+ if (write (fd , &cleanmarker, sizeof (cleanmarker)) != sizeof (cleanmarker)) {
+ fprintf(stderr, "\n%s: MTD write failure: %s\n", mtd_name, strerror(errno));
+ continue;
+ }
+ }
+ if (!quiet)
+ printf (" Cleanmarker written at %x.", erase.start);
+ }
+ if (!quiet) {
+ show_progress(&meminfo, &erase);
+ printf("\n");
+ }
+
+ return 0;
+}
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