diff options
Diffstat (limited to 'target/linux')
| -rw-r--r-- | target/linux/generic-2.4/patches/227-jffs2_eofdetect.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/target/linux/generic-2.4/patches/227-jffs2_eofdetect.patch b/target/linux/generic-2.4/patches/227-jffs2_eofdetect.patch new file mode 100644 index 000000000..6288bd575 --- /dev/null +++ b/target/linux/generic-2.4/patches/227-jffs2_eofdetect.patch @@ -0,0 +1,87 @@ +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; + |