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

   1 Index: linux-2.6.21.7/fs/jffs2/build.c
   2 ===================================================================
   3 --- linux-2.6.21.7.orig/fs/jffs2/build.c
   4 +++ linux-2.6.21.7/fs/jffs2/build.c
   5 @@ -107,6 +107,17 @@ static int jffs2_build_filesystem(struct
   6         dbg_fsbuild("scanned flash completely\n");
   7         jffs2_dbg_dump_block_lists_nolock(c);
   8
   9 +       if (c->flags & (1 << 7)) {
  10 +               printk("%s(): unlocking the mtd device... ", __func__);
  11 +               if (c->mtd->unlock)
  12 +                       c->mtd->unlock(c->mtd, 0, c->mtd->size);
  13 +               printk("done.\n");
  14 +
  15 +               printk("%s(): erasing all blocks after the end marker... ", __func__);
  16 +               jffs2_erase_pending_blocks(c, -1);
  17 +               printk("done.\n");
  18 +       }
  19 +
  20         dbg_fsbuild("pass 1 starting\n");
  21         c->flags |= JFFS2_SB_FLAG_BUILDING;
  22         /* Now scan the directory tree, increasing nlink according to every dirent found. */
  23 Index: linux-2.6.21.7/fs/jffs2/scan.c
  24 ===================================================================
  25 --- linux-2.6.21.7.orig/fs/jffs2/scan.c
  26 +++ linux-2.6.21.7/fs/jffs2/scan.c
  27 @@ -143,9 +143,12 @@ int jffs2_scan_medium(struct jffs2_sb_in
  28
  29                 /* reset summary info for next eraseblock scan */
  30                 jffs2_sum_reset_collected(s);
  31 -
  32 -               ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset),
  33 -                                               buf_size, s);
  34 +
  35 +               if (c->flags & (1 << 7))
  36 +                       ret = BLK_STATE_ALLFF;
  37 +               else
  38 +                       ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset),
  39 +                                                       buf_size, s);
  40
  41                 if (ret < 0)
  42                         goto out;
  43 @@ -546,6 +549,17 @@ static int jffs2_scan_eraseblock (struct
  44                         return err;
  45         }
  46
  47 +       if ((buf[0] == 0xde) &&
  48 +               (buf[1] == 0xad) &&
  49 +               (buf[2] == 0xc0) &&
  50 +               (buf[3] == 0xde)) {
  51 +               /* end of filesystem. erase everything after this point */
  52 +               printk("%s(): End of filesystem marker found at 0x%x\n", __func__, jeb->offset);
  53 +               c->flags |= (1 << 7);
  54 +
  55 +               return BLK_STATE_ALLFF;
  56 +       }
  57 +
  58         /* We temporarily use 'ofs' as a pointer into the buffer/jeb */
  59         ofs = 0;
  60