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backport jffs2 eof detect changes from 2.6 

SVN-Revision: 4062
lede-17.01
Felix Fietkau 2006-06-23 20:21:09 +00:00
parent ef6788dd04
commit 9a2279b3f5
1 changed files with 45 additions and 36 deletions
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81
openwrt/target/linux/generic-2.4/patches/227-jffs2_eofdetect.patch
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@ -1,6 +1,47 @@
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 2003-11-28 19:26:21.000000000 +0100
+++ linux.dev/fs/jffs2/scan.c 2006-06-22 00:29:02.000000000 +0200
--- 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.
@ -26,38 +67,7 @@ diff -ur linux.old/fs/jffs2/scan.c linux.dev/fs/jffs2/scan.c
if (ret < 0)
return ret;
@@ -145,15 +154,23 @@
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);
+ jffs2_mark_erased_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 @@
@@ -181,6 +190,7 @@
while(ofs < jeb->offset + c->sector_size) {
ssize_t retlen;
@ -65,7 +75,7 @@ diff -ur linux.old/fs/jffs2/scan.c linux.dev/fs/jffs2/scan.c
ACCT_PARANOIA_CHECK(jeb);
if (ofs & 3) {
@@ -202,8 +219,18 @@
@@ -202,8 +212,18 @@
break;
}
@ -85,4 +95,3 @@ diff -ur linux.old/fs/jffs2/scan.c linux.dev/fs/jffs2/scan.c
if (err) {
D1(printk(KERN_WARNING "mtd->read(0x%x bytes from 0x%x) returned %d\n", sizeof(node), ofs, err));
return err;