target/linux/generic-2.6/patches/204-jffs2_eofdetect.patch

   1 diff -urN linux-2.6.21.1.old/fs/jffs2/build.c linux-2.6.21.1.dev/fs/jffs2/build.c
   2 --- linux-2.6.21.1.old/fs/jffs2/build.c 2007-04-27 23:49:26.000000000 +0200
   3 +++ linux-2.6.21.1.dev/fs/jffs2/build.c 2007-05-26 20:52:04.425726968 +0200
   4 @@ -107,6 +107,17 @@
   5         dbg_fsbuild("scanned flash completely\n");
   6         jffs2_dbg_dump_block_lists_nolock(c);
   7
   8 +       if (c->flags & (1 << 7)) {
   9 +               printk("%s(): unlocking the mtd device... ", __func__);
  10 +               if (c->mtd->unlock)
  11 +                       c->mtd->unlock(c->mtd, 0, c->mtd->size);
  12 +               printk("done.\n");
  13 +
  14 +               printk("%s(): erasing all blocks after the end marker... ", __func__);
  15 +               jffs2_erase_pending_blocks(c, -1);
  16 +               printk("done.\n");
  17 +       }
  18 +
  19         dbg_fsbuild("pass 1 starting\n");
  20         c->flags |= JFFS2_SB_FLAG_BUILDING;
  21         /* Now scan the directory tree, increasing nlink according to every dirent found. */
  22 diff -urN linux-2.6.21.1.old/fs/jffs2/scan.c linux-2.6.21.1.dev/fs/jffs2/scan.c
  23 --- linux-2.6.21.1.old/fs/jffs2/scan.c  2007-04-27 23:49:26.000000000 +0200
  24 +++ linux-2.6.21.1.dev/fs/jffs2/scan.c  2007-05-26 20:52:04.491716936 +0200
  25 @@ -143,9 +143,12 @@
  26
  27                 /* reset summary info for next eraseblock scan */
  28                 jffs2_sum_reset_collected(s);
  29 -
  30 -               ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset),
  31 -                                               buf_size, s);
  32 +
  33 +               if (c->flags & (1 << 7))
  34 +                       ret = BLK_STATE_ALLFF;
  35 +               else
  36 +                       ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset),
  37 +                                                       buf_size, s);
  38
  39                 if (ret < 0)
  40                         goto out;
  41 @@ -546,6 +549,17 @@
  42                         return err;
  43         }
  44
  45 +       if ((buf[0] == 0xde) &&
  46 +               (buf[1] == 0xad) &&
  47 +               (buf[2] == 0xc0) &&
  48 +               (buf[3] == 0xde)) {
  49 +               /* end of filesystem. erase everything after this point */
  50 +               printk("%s(): End of filesystem marker found at 0x%x\n", __func__, jeb->offset);
  51 +               c->flags |= (1 << 7);
  52 +
  53 +               return BLK_STATE_ALLFF;
  54 +       }
  55 +
  56         /* We temporarily use 'ofs' as a pointer into the buffer/jeb */
  57         ofs = 0;
  58