87 lines
2.5 KiB
Diff
87 lines
2.5 KiB
Diff
diff -ur linux.old/fs/jffs2/scan.c linux.dev/fs/jffs2/scan.c
|
|
--- linux.old/fs/jffs2/scan.c 2003-11-28 19:26:21.000000000 +0100
|
|
+++ linux.dev/fs/jffs2/scan.c 2006-06-22 00:29:02.000000000 +0200
|
|
@@ -31,6 +31,10 @@
|
|
* provisions above, a recipient may use your version of this file
|
|
* under either the RHEPL or the GPL.
|
|
*
|
|
+ * Modification for automatically cleaning the filesystem after
|
|
+ * a specially marked block
|
|
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
|
|
+ *
|
|
* $Id: scan.c,v 1.51.2.4 2003/11/02 13:51:18 dwmw2 Exp $
|
|
*
|
|
*/
|
|
@@ -88,7 +92,12 @@
|
|
for (i=0; i<c->nr_blocks; i++) {
|
|
struct jffs2_eraseblock *jeb = &c->blocks[i];
|
|
|
|
- ret = jffs2_scan_eraseblock(c, jeb);
|
|
+
|
|
+ if (c->flags & (1 << 7))
|
|
+ ret = 1;
|
|
+ else
|
|
+ ret = jffs2_scan_eraseblock(c, jeb);
|
|
+
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
@@ -145,15 +154,22 @@
|
|
c->nr_erasing_blocks++;
|
|
}
|
|
}
|
|
- /* Rotate the lists by some number to ensure wear levelling */
|
|
- jffs2_rotate_lists(c);
|
|
|
|
- if (c->nr_erasing_blocks) {
|
|
- if (!c->used_size && empty_blocks != c->nr_blocks) {
|
|
- printk(KERN_NOTICE "Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes\n");
|
|
- return -EIO;
|
|
+ if (c->flags & (1 << 7)) {
|
|
+ printk("jffs2_scan_medium(): erasing all blocks after the end marker...\n");
|
|
+ jffs2_erase_pending_blocks(c);
|
|
+ printk("jffs2_scan_medium(): done.\n");
|
|
+ } else {
|
|
+ /* Rotate the lists by some number to ensure wear levelling */
|
|
+ jffs2_rotate_lists(c);
|
|
+
|
|
+ if (c->nr_erasing_blocks) {
|
|
+ if (!c->used_size && empty_blocks != c->nr_blocks) {
|
|
+ printk(KERN_NOTICE "Cowardly refusing to erase blocks on filesystem with no valid JFFS2 nodes\n");
|
|
+ return -EIO;
|
|
+ }
|
|
+ jffs2_erase_pending_trigger(c);
|
|
}
|
|
- jffs2_erase_pending_trigger(c);
|
|
}
|
|
return 0;
|
|
}
|
|
@@ -181,6 +197,7 @@
|
|
|
|
while(ofs < jeb->offset + c->sector_size) {
|
|
ssize_t retlen;
|
|
+ unsigned char *buf = (unsigned char *) &node;
|
|
ACCT_PARANOIA_CHECK(jeb);
|
|
|
|
if (ofs & 3) {
|
|
@@ -202,8 +219,18 @@
|
|
break;
|
|
}
|
|
|
|
- err = c->mtd->read(c->mtd, ofs, sizeof(node), &retlen, (char *)&node);
|
|
+ err = c->mtd->read(c->mtd, ofs, sizeof(node), &retlen, buf);
|
|
+ if ((buf[0] == 0xde) &&
|
|
+ (buf[1] == 0xad) &&
|
|
+ (buf[2] == 0xc0) &&
|
|
+ (buf[3] == 0xde)) {
|
|
+
|
|
+ /* end of filesystem. erase everything after this point */
|
|
+ c->flags |= (1 << 7);
|
|
+ printk("jffs2_scan_eraseblock(): End of filesystem marker found at 0x%x\n", jeb->offset);
|
|
|
|
+ return 1;
|
|
+ }
|
|
if (err) {
|
|
D1(printk(KERN_WARNING "mtd->read(0x%x bytes from 0x%x) returned %d\n", sizeof(node), ofs, err));
|
|
return err;
|
|
|