finally move buildroot-ng to trunk
[openwrt.git] / target / linux / generic-2.4 / patches / 227-jffs2_eofdetect.patch
1 diff -ur linux.old/fs/jffs2/build.c linux.dev/fs/jffs2/build.c
2 --- linux.old/fs/jffs2/build.c  2003-06-13 16:51:37.000000000 +0200
3 +++ linux.dev/fs/jffs2/build.c  2006-06-23 22:15:21.000000000 +0200
4 @@ -31,6 +31,10 @@
5   * provisions above, a recipient may use your version of this file
6   * under either the RHEPL or the GPL.
7   *
8 + * Modification for automatically cleaning the filesystem after
9 + * a specially marked block
10 + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
11 + *
12   * $Id: build.c,v 1.16.2.3 2003/04/30 09:43:32 dwmw2 Exp $
13   *
14   */
15 @@ -38,6 +42,7 @@
16  #include <linux/kernel.h>
17  #include <linux/jffs2.h>
18  #include <linux/slab.h>
19 +#include <linux/mtd/mtd.h>
20  #include "nodelist.h"
21  
22  int jffs2_build_inode_pass1(struct jffs2_sb_info *, struct jffs2_inode_cache *);
23 @@ -89,6 +94,18 @@
24         if (ret)
25                 return ret;
26  
27 +       if (c->flags & (1 << 7)) {
28 +               printk("%s(): unlocking the mtd device... ", __func__);
29 +               if (c->mtd->unlock)
30 +                       c->mtd->unlock(c->mtd, 0, c->mtd->size);
31 +               printk("done.\n");
32 +               
33 +               printk("%s(): erasing all blocks after the end marker... ", __func__);
34 +               jffs2_erase_pending_blocks(c);
35 +               jffs2_mark_erased_blocks(c);
36 +               printk("done.\n");
37 +       }
38 +
39         D1(printk(KERN_DEBUG "Scanned flash completely\n"));
40         /* Now build the data map for each inode, marking obsoleted nodes
41            as such, and also increase nlink of any children. */
42 diff -ur linux.old/fs/jffs2/scan.c linux.dev/fs/jffs2/scan.c
43 --- linux.old/fs/jffs2/scan.c   2006-06-23 21:57:32.000000000 +0200
44 +++ linux.dev/fs/jffs2/scan.c   2006-06-23 22:01:35.000000000 +0200
45 @@ -31,6 +31,10 @@
46   * provisions above, a recipient may use your version of this file
47   * under either the RHEPL or the GPL.
48   *
49 + * Modification for automatically cleaning the filesystem after
50 + * a specially marked block
51 + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
52 + *
53   * $Id: scan.c,v 1.51.2.4 2003/11/02 13:51:18 dwmw2 Exp $
54   *
55   */
56 @@ -88,7 +92,12 @@
57         for (i=0; i<c->nr_blocks; i++) {
58                 struct jffs2_eraseblock *jeb = &c->blocks[i];
59  
60 -               ret = jffs2_scan_eraseblock(c, jeb);
61 +
62 +               if (c->flags & (1 << 7))
63 +                       ret = 1;
64 +               else
65 +                       ret = jffs2_scan_eraseblock(c, jeb);
66 +
67                 if (ret < 0)
68                         return ret;
69  
70 @@ -181,6 +190,7 @@
71  
72         while(ofs < jeb->offset + c->sector_size) {
73                 ssize_t retlen;
74 +               unsigned char *buf = (unsigned char *) &node;
75                 ACCT_PARANOIA_CHECK(jeb);
76                 
77                 if (ofs & 3) {
78 @@ -202,8 +212,18 @@
79                         break;
80                 }
81  
82 -               err = c->mtd->read(c->mtd, ofs, sizeof(node), &retlen, (char *)&node);
83 +               err = c->mtd->read(c->mtd, ofs, sizeof(node), &retlen, buf);
84 +               if ((buf[0] == 0xde) &&
85 +                       (buf[1] == 0xad) &&
86 +                       (buf[2] == 0xc0) &&
87 +                       (buf[3] == 0xde)) {
88 +                               
89 +                       /* end of filesystem. erase everything after this point */
90 +                       c->flags |= (1 << 7);
91 +                       printk("jffs2_scan_eraseblock(): End of filesystem marker found at 0x%x\n", jeb->offset);
92                 
93 +                       return 1;
94 +               }
95                 if (err) {
96                         D1(printk(KERN_WARNING "mtd->read(0x%x bytes from 0x%x) returned %d\n", sizeof(node), ofs, err));
97                         return err;