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authorBrian Norris <computersforpeace@gmail.com>2011-06-22 09:49:17 -0700
committerArtem Bityutskiy <dedekind1@gmail.com>2011-06-23 17:57:55 +0300
commitc2c3cb928935c6c4f0ac3fa9390d41c3ee6abc51 (patch)
tree81365b10dd250ead22653362e47d54af2fea4ced
parent266061ebd5d72391f0a0e831b018e8fc7fea68a1 (diff)
nanddump: add --bb=METHOD option
We have too many separate bad block handling methods: --omitbad --noskipbad --skipbad On top of these, we have the default option: that bad blocks are replaced with 0xFF. These options will be unified under --bb=METHOD. The end goal will be something like: ---------------------------------------------------------------------------------------------- Old option New option Comment ---------------------------------------------------------------------------------------------- <default> --bb=padbad dump flash data, substituting 0xFF for any bad blocks --noskipbad --bb=dumpbad dump flash data, including any bad blocks --skipbad --bb=skipbad dump good data, completely skipping any bad blocks (new default) --omitbad N/A very similar to `skipbad' (DEPRECTATED) The BB options are all mutually exclusive, so we check that we do not have more than one BB option explicitly enabled on the command line by tracking whether or not a BB method has been set by the user. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <dedekind1@gmail.com>
-rw-r--r--nanddump.c67
1 files changed, 45 insertions, 22 deletions
diff --git a/nanddump.c b/nanddump.c
index c9d7e8b..08f8964 100644
--- a/nanddump.c
+++ b/nanddump.c
@@ -88,21 +88,26 @@ static void display_version(void)
static bool pretty_print = false; // print nice
static bool noecc = false; // don't error correct
-static bool noskipbad = false; // don't skip bad blocks
static bool omitoob = false; // omit oob data
static long long start_addr; // start address
static long long length; // dump length
static const char *mtddev; // mtd device name
static const char *dumpfile; // dump file name
-static bool omitbad = false;
static bool quiet = false; // suppress diagnostic output
static bool canonical = false; // print nice + ascii
static bool forcebinary = false; // force printing binary to tty
-static bool skipbad = false; // skip over bad blocks
+
+static enum {
+ padbad, // dump flash data, substituting 0xFF for any bad blocks
+ dumpbad, // dump flash data, including any bad blocks
+ skipbad, // dump good data, completely skipping any bad blocks
+ omitbad // dump flash data, substituting nothing for any bad blocks (DEPRECATED)
+} bb_method = padbad;
static void process_options(int argc, char * const argv[])
{
int error = 0;
+ bool bb_default = true;
for (;;) {
int option_index = 0;
@@ -110,6 +115,7 @@ static void process_options(int argc, char * const argv[])
static const struct option long_options[] = {
{"help", no_argument, 0, 0},
{"version", no_argument, 0, 0},
+ {"bb", required_argument, 0, 0},
{"forcebinary", no_argument, 0, 'a'},
{"canonicalprint", no_argument, 0, 'c'},
{"file", required_argument, 0, 'f'},
@@ -140,10 +146,28 @@ static void process_options(int argc, char * const argv[])
case 1:
display_version();
break;
+ case 2:
+ /* Handle --bb=METHOD */
+ if (!strcmp(optarg, "padbad"))
+ bb_method = padbad;
+ else if (!strcmp(optarg, "dumpbad"))
+ bb_method = dumpbad;
+ else if (!strcmp(optarg, "skipbad"))
+ bb_method = skipbad;
+ else
+ error++;
+ bb_default = false;
+ break;
}
break;
case 'b':
- omitbad = true;
+ /* Check if bb_method was already set explicitly */
+ if (bb_default) {
+ bb_default = false;
+ bb_method = omitbad;
+ } else {
+ error++;
+ }
break;
case 's':
start_addr = simple_strtoll(optarg, &error);
@@ -175,10 +199,22 @@ static void process_options(int argc, char * const argv[])
noecc = true;
break;
case 'N':
- noskipbad = true;
+ /* Check if bb_method was already set explicitly */
+ if (bb_default) {
+ bb_default = false;
+ bb_method = dumpbad;
+ } else {
+ error++;
+ }
break;
case 'k':
- skipbad = true;
+ /* Check if bb_method was already set explicitly */
+ if (bb_default) {
+ bb_default = false;
+ bb_method = skipbad;
+ } else {
+ error++;
+ }
break;
case '?':
error++;
@@ -206,19 +242,6 @@ static void process_options(int argc, char * const argv[])
exit(EXIT_FAILURE);
}
- if (noskipbad && skipbad) {
- fprintf(stderr, "The noskipbad and skipbad options are "
- "mutually-exclusive.\n"
- "Choose one or the other.\n");
- exit(EXIT_FAILURE);
- }
-
- if (omitbad && skipbad) {
- fprintf(stderr, "The omitbad and skipbad options are mutually-"
- "exclusive.\nChoose one or the other.\n");
- exit(EXIT_FAILURE);
- }
-
if ((argc - optind) != 1 || error)
display_help();
@@ -416,7 +439,7 @@ int main(int argc, char * const argv[])
/* Dump the flash contents */
for (ofs = start_addr; ofs < end_addr; ofs += bs) {
/* Check for bad block */
- if (noskipbad) {
+ if (bb_method == dumpbad) {
badblock = 0;
} else if (blockstart != (ofs & (~mtd.eb_size + 1)) ||
firstblock) {
@@ -430,14 +453,14 @@ int main(int argc, char * const argv[])
if (badblock) {
/* skip bad block, increase end_addr */
- if (skipbad) {
+ if (bb_method == skipbad) {
end_addr += mtd.eb_size;
ofs += mtd.eb_size - bs;
if (end_addr > mtd.size)
end_addr = mtd.size;
continue;
}
- if (omitbad)
+ if (bb_method == omitbad)
continue;
memset(readbuf, 0xff, bs);
} else {