diff options
Diffstat (limited to 'target/linux/generic-2.4/patches/227-jffs2_eofdetect.patch')
| -rw-r--r-- | target/linux/generic-2.4/patches/227-jffs2_eofdetect.patch | 97 |
1 files changed, 97 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 0000000000..fe97be5b3f --- /dev/null +++ b/target/linux/generic-2.4/patches/227-jffs2_eofdetect.patch @@ -0,0 +1,97 @@ +diff -ur linux.old/fs/jffs2/build.c linux.dev/fs/jffs2/build.c +--- linux.old/fs/jffs2/build.c 2003-06-13 16:51:37.000000000 +0200 ++++ linux.dev/fs/jffs2/build.c 2006-06-23 22:15:21.000000000 +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: build.c,v 1.16.2.3 2003/04/30 09:43:32 dwmw2 Exp $ + * + */ +@@ -38,6 +42,7 @@ + #include <linux/kernel.h> + #include <linux/jffs2.h> + #include <linux/slab.h> ++#include <linux/mtd/mtd.h> + #include "nodelist.h" + + int jffs2_build_inode_pass1(struct jffs2_sb_info *, struct jffs2_inode_cache *); +@@ -89,6 +94,18 @@ + if (ret) + return ret; + ++ if (c->flags & (1 << 7)) { ++ printk("%s(): unlocking the mtd device... ", __func__); ++ if (c->mtd->unlock) ++ c->mtd->unlock(c->mtd, 0, c->mtd->size); ++ printk("done.\n"); ++ ++ printk("%s(): erasing all blocks after the end marker... ", __func__); ++ jffs2_erase_pending_blocks(c); ++ jffs2_mark_erased_blocks(c); ++ printk("done.\n"); ++ } ++ + D1(printk(KERN_DEBUG "Scanned flash completely\n")); + /* Now build the data map for each inode, marking obsoleted nodes + as such, and also increase nlink of any children. */ +diff -ur linux.old/fs/jffs2/scan.c linux.dev/fs/jffs2/scan.c +--- linux.old/fs/jffs2/scan.c 2006-06-23 21:57:32.000000000 +0200 ++++ linux.dev/fs/jffs2/scan.c 2006-06-23 22:01:35.000000000 +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; + +@@ -181,6 +190,7 @@ + + 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 +212,18 @@ + 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; |