From b431ea844a1770f46eeac738df7595c549a3deac Mon Sep 17 00:00:00 2001
From: David Woodhouse <dwmw2@infradead.org>
Date: Mon, 6 Aug 2007 16:13:30 +0800
Subject: Copy with write errors in nandwrite, add 'markbad' option too.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
---
 nandwrite.c | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

(limited to 'nandwrite.c')

diff --git a/nandwrite.c b/nandwrite.c
index 6c4653f..a5462ae 100644
--- a/nandwrite.c
+++ b/nandwrite.c
@@ -78,7 +78,8 @@ void display_help (void)
 			"  -a, --autoplace	Use auto oob layout\n"
 			"  -j, --jffs2		force jffs2 oob layout (legacy support)\n"
 			"  -y, --yaffs		force yaffs oob layout (legacy support)\n"
-			"  -f, --forcelegacy     force legacy support on autoplacement enabled mtd device\n"
+			"  -f, --forcelegacy	force legacy support on autoplacement enabled mtd device\n"
+			"  -m, --markbad		mark blocks bad if write fails\n"
 			"  -n, --noecc		write without ecc\n"
 			"  -o, --oob		image contains oob data\n"
 			"  -s addr, --start=addr set start address (default is 0)\n"
@@ -109,6 +110,7 @@ char	*mtd_device, *img;
 int	mtdoffset = 0;
 int	quiet = 0;
 int	writeoob = 0;
+int	markbad = 0;
 int	autoplace = 0;
 int	forcejffs2 = 0;
 int	forceyaffs = 0;
@@ -123,7 +125,7 @@ void process_options (int argc, char *argv[])
 
 	for (;;) {
 		int option_index = 0;
-		static const char *short_options = "ab:fjnopqs:y";
+		static const char *short_options = "ab:fjmnopqs:y";
 		static const struct option long_options[] = {
 			{"help", no_argument, 0, 0},
 			{"version", no_argument, 0, 0},
@@ -131,6 +133,7 @@ void process_options (int argc, char *argv[])
 			{"blockalign", required_argument, 0, 'b'},
 			{"forcelegacy", no_argument, 0, 'f'},
 			{"jffs2", no_argument, 0, 'j'},
+			{"markbad", no_argument, 0, 'm'},
 			{"noecc", no_argument, 0, 'n'},
 			{"oob", no_argument, 0, 'o'},
 			{"pad", no_argument, 0, 'p'},
@@ -175,6 +178,9 @@ void process_options (int argc, char *argv[])
 			case 'n':
 				noecc = 1;
 				break;
+			case 'm':
+				markbad = 1;
+				break;
 			case 'o':
 				writeoob = 1;
 				break;
@@ -450,8 +456,42 @@ int main(int argc, char **argv)
 
 		/* Write out the Page data */
 		if (pwrite(fd, writebuf, meminfo.writesize, mtdoffset) != meminfo.writesize) {
+			int rewind_blocks;
+			off_t rewind_bytes;
+			erase_info_t erase;
+
 			perror ("pwrite");
-			goto closeall;
+			/* Must rewind to blockstart if we can */
+			rewind_blocks = (mtdoffset - blockstart) / meminfo.writesize; /* Not including the one we just attempted */
+			rewind_bytes = (rewind_blocks * meminfo.writesize) + readlen;
+			if (writeoob)
+				rewind_bytes += (rewind_blocks + 1) * meminfo.oobsize;
+			if (lseek(ifd, -rewind_bytes, SEEK_CUR) == -1) {
+				perror("lseek");
+				fprintf(stderr, "Failed to seek backwards to recover from write error\n");
+				goto closeall;
+			}
+			erase.start = blockstart;
+			erase.length = meminfo.erasesize;
+			fprintf(stderr, "Erasing failed write from %08lx-%08lx\n",
+				(long)erase.start, (long)erase.start+erase.length-1);
+			if (ioctl(fd, MEMERASE, &erase) != 0) {
+				perror("MEMERASE");
+				goto closeall;
+			}
+
+			if (markbad) {
+				loff_t bad_addr = mtdoffset & (~(meminfo.erasesize / blockalign) + 1);
+				fprintf(stderr, "Marking block at %08lx bad\n", (long)bad_addr);
+				if (ioctl(fd, MEMSETBADBLOCK, &bad_addr)) {
+					perror("MEMSETBADBLOCK");
+					/* But continue anyway */
+				}
+			}
+			mtdoffset = blockstart + meminfo.erasesize;
+			imglen += rewind_blocks * meminfo.writesize;
+
+			continue;
 		}
 		imglen -= readlen;
 		mtdoffset += meminfo.writesize;
-- 
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