busybox/miscutils/flash_eraseall.c

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/* vi: set sw=4 ts=4: */
/*
* 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
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config FLASH_ERASEALL
//config: bool "flash_eraseall (5.5 kb)"
//config: default n # doesn't build on Ubuntu 8.04
//config: help
//config: The flash_eraseall binary from mtd-utils as of git head c4c6a59eb.
//config: This utility is used to erase the whole MTD device.
//applet:IF_FLASH_ERASEALL(APPLET(flash_eraseall, BB_DIR_USR_SBIN, BB_SUID_DROP))
/* not NOEXEC: if flash operation stalls, use less memory in "hung" process */
//kbuild:lib-$(CONFIG_FLASH_ERASEALL) += flash_eraseall.o
//usage:#define flash_eraseall_trivial_usage
//usage: "[-jNq] MTD_DEVICE"
//usage:#define flash_eraseall_full_usage "\n\n"
//usage: "Erase an MTD device\n"
//usage: "\n -j Format the device for jffs2"
//usage: "\n -N Don't skip bad blocks"
//usage: "\n -q Don't display progress messages"
#include "libbb.h"
#include <mtd/mtd-user.h>
#include <linux/jffs2.h>
#define OPTION_J (1 << 0)
#define OPTION_N (1 << 1)
#define OPTION_Q (1 << 2)
#define IS_NAND (1 << 3)
/* mtd/jffs2-user.h used to have this atrocity:
extern int target_endian;
#define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
#define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
#define cpu_to_je16(x) ((jint16_t){t16(x)})
#define cpu_to_je32(x) ((jint32_t){t32(x)})
#define cpu_to_jemode(x) ((jmode_t){t32(x)})
#define je16_to_cpu(x) (t16((x).v16))
#define je32_to_cpu(x) (t32((x).v32))
#define jemode_to_cpu(x) (t32((x).m))
but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
*/
/* We always use native endianness */
#undef cpu_to_je16
#undef cpu_to_je32
#define cpu_to_je16(v) ((jint16_t){(v)})
#define cpu_to_je32(v) ((jint32_t){(v)})
static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
{
printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
(unsigned)meminfo->erasesize / 1024,
erase->start,
(unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
);
fflush_all();
}
int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
{
struct jffs2_unknown_node cleanmarker;
mtd_info_t meminfo;
int fd, clmpos, clmlen;
erase_info_t erase;
struct stat st;
unsigned int flags;
char *mtd_name;
getopt32: remove opt_complementary function old new delta vgetopt32 1318 1392 +74 runsvdir_main 703 713 +10 bb_make_directory 423 425 +2 collect_cpu 546 545 -1 opt_chars 3 - -3 opt_complementary 4 - -4 tftpd_main 567 562 -5 ntp_init 476 471 -5 zcip_main 1266 1256 -10 xxd_main 428 418 -10 whois_main 140 130 -10 who_main 463 453 -10 which_main 212 202 -10 wget_main 2535 2525 -10 watchdog_main 291 281 -10 watch_main 222 212 -10 vlock_main 399 389 -10 uuencode_main 332 322 -10 uudecode_main 316 306 -10 unlink_main 45 35 -10 udhcpd_main 1482 1472 -10 udhcpc_main 2762 2752 -10 tune2fs_main 290 280 -10 tunctl_main 366 356 -10 truncate_main 218 208 -10 tr_main 518 508 -10 time_main 1134 1124 -10 tftp_main 286 276 -10 telnetd_main 1873 1863 -10 tcpudpsvd_main 1785 1775 -10 taskset_main 521 511 -10 tar_main 1009 999 -10 tail_main 1644 1634 -10 syslogd_main 1967 1957 -10 switch_root_main 368 358 -10 svlogd_main 1454 1444 -10 sv 1296 1286 -10 stat_main 104 94 -10 start_stop_daemon_main 1028 1018 -10 split_main 542 532 -10 sort_main 796 786 -10 slattach_main 624 614 -10 shuf_main 504 494 -10 setsid_main 96 86 -10 setserial_main 1132 1122 -10 setfont_main 388 378 -10 setconsole_main 78 68 -10 sendmail_main 1209 1199 -10 sed_main 677 667 -10 script_main 1077 1067 -10 run_parts_main 325 315 -10 rtcwake_main 454 444 -10 rm_main 175 165 -10 reformime_main 119 109 -10 readlink_main 123 113 -10 rdate_main 246 236 -10 pwdx_main 189 179 -10 pstree_main 317 307 -10 pscan_main 663 653 -10 popmaildir_main 818 808 -10 pmap_main 80 70 -10 nc_main 1042 1032 -10 mv_main 558 548 -10 mountpoint_main 477 467 -10 mount_main 1264 1254 -10 modprobe_main 768 758 -10 modinfo_main 333 323 -10 mktemp_main 200 190 -10 mkswap_main 324 314 -10 mkfs_vfat_main 1489 1479 -10 microcom_main 715 705 -10 md5_sha1_sum_main 521 511 -10 man_main 867 857 -10 makedevs_main 1052 1042 -10 ls_main 563 553 -10 losetup_main 432 422 -10 loadfont_main 89 79 -10 ln_main 524 514 -10 link_main 75 65 -10 ipcalc_main 544 534 -10 iostat_main 2397 2387 -10 install_main 768 758 -10 id_main 480 470 -10 i2cset_main 1239 1229 -10 i2cget_main 380 370 -10 i2cdump_main 1482 1472 -10 i2cdetect_main 682 672 -10 hwclock_main 406 396 -10 httpd_main 741 731 -10 grep_main 837 827 -10 getty_main 1559 1549 -10 fuser_main 297 287 -10 ftpgetput_main 345 335 -10 ftpd_main 2232 2222 -10 fstrim_main 251 241 -10 fsfreeze_main 77 67 -10 fsck_minix_main 2921 2911 -10 flock_main 314 304 -10 flashcp_main 740 730 -10 flash_eraseall_main 833 823 -10 fdformat_main 532 522 -10 expand_main 680 670 -10 eject_main 335 325 -10 dumpleases_main 630 620 -10 du_main 314 304 -10 dos2unix_main 441 431 -10 diff_main 1350 1340 -10 df_main 1064 1054 -10 date_main 1095 1085 -10 cut_main 961 951 -10 cryptpw_main 228 218 -10 crontab_main 575 565 -10 crond_main 1149 1139 -10 cp_main 370 360 -10 common_traceroute_main 3834 3824 -10 common_ping_main 1767 1757 -10 comm_main 239 229 -10 cmp_main 655 645 -10 chrt_main 379 369 -10 chpst_main 704 694 -10 chpasswd_main 308 298 -10 chown_main 171 161 -10 chmod_main 158 148 -10 cat_main 428 418 -10 bzip2_main 120 110 -10 blkdiscard_main 264 254 -10 base64_main 221 211 -10 arping_main 1665 1655 -10 ar_main 556 546 -10 adjtimex_main 406 396 -10 adduser_main 882 872 -10 addgroup_main 411 401 -10 acpid_main 1198 1188 -10 optstring 11 - -11 opt_string 18 - -18 OPT_STR 25 - -25 ubi_tools_main 1288 1258 -30 ls_options 31 - -31 ------------------------------------------------------------------------------ (add/remove: 0/6 grow/shrink: 3/129 up/down: 86/-1383) Total: -1297 bytes text data bss dec hex filename 915428 485 6876 922789 e14a5 busybox_old 914629 485 6872 921986 e1182 busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
2017-08-09 01:25:02 +05:30
flags = getopt32(argv, "^" "jNq" "\0" "=1");
mtd_name = argv[optind];
fd = xopen(mtd_name, O_RDWR);
fstat(fd, &st);
if (!S_ISCHR(st.st_mode))
bb_error_msg_and_die("%s: not a char device", mtd_name);
xioctl(fd, MEMGETINFO, &meminfo);
erase.length = meminfo.erasesize;
if (meminfo.type == MTD_NANDFLASH)
flags |= IS_NAND;
clmpos = 0;
clmlen = 8;
if (flags & OPTION_J) {
uint32_t *crc32_table;
crc32_table = crc32_filltable(NULL, 0);
cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
if (!(flags & IS_NAND))
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 */
clmpos = oobinfo.oobfree[0][0];
clmlen = oobinfo.oobfree[0][1];
if (clmlen > 8)
clmlen = 8;
if (clmlen == 0)
bb_error_msg_and_die("autoplacement selected and no empty space in oob");
} 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_block_endian0(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, crc32_table)
);
}
/* Don't want to destroy progress indicator by bb_error_msg's */
applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
for (erase.start = 0; erase.start < meminfo.size;
erase.start += meminfo.erasesize) {
if (!(flags & OPTION_N)) {
int ret;
loff_t offset = erase.start;
ret = ioctl(fd, MEMGETBADBLOCK, &offset);
if (ret > 0) {
if (!(flags & OPTION_Q))
printf("\nSkipping bad block at 0x%08x\n", erase.start);
continue;
}
if (ret < 0) {
/* Black block table is not available on certain flash
* types e.g. NOR
*/
if (errno == EOPNOTSUPP) {
flags |= OPTION_N;
if (flags & IS_NAND)
bb_error_msg_and_die("bad block check not available");
} else {
bb_perror_msg_and_die("MEMGETBADBLOCK error");
}
}
}
if (!(flags & OPTION_Q))
show_progress(&meminfo, &erase);
xioctl(fd, MEMERASE, &erase);
/* format for JFFS2 ? */
if (!(flags & OPTION_J))
continue;
/* write cleanmarker */
if (flags & IS_NAND) {
struct mtd_oob_buf oob;
oob.ptr = (unsigned char *) &cleanmarker;
oob.start = erase.start + clmpos;
oob.length = clmlen;
xioctl(fd, MEMWRITEOOB, &oob);
} else {
xlseek(fd, erase.start, SEEK_SET);
/* if (lseek(fd, erase.start, SEEK_SET) < 0) {
bb_perror_msg("MTD %s failure", "seek");
continue;
} */
xwrite(fd, &cleanmarker, sizeof(cleanmarker));
/* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
bb_perror_msg("MTD %s failure", "write");
continue;
} */
}
if (!(flags & OPTION_Q))
printf(" Cleanmarker written at %x.", erase.start);
}
if (!(flags & OPTION_Q)) {
show_progress(&meminfo, &erase);
bb_putchar('\n');
}
if (ENABLE_FEATURE_CLEAN_UP)
close(fd);
return EXIT_SUCCESS;
}