git.ipfire.org Git - thirdparty/openembedded/openembedded-core-contrib.git/blob

   1 From a95b831e18dd123f859bc5e6c4cecdcc0184ee37 Mon Sep 17 00:00:00 2001
   2 From: Robert Yang <liezhi.yang@windriver.com>
   3 Date: Fri, 2 Jan 2015 12:18:02 +0800
   4 Subject: [PATCH 7/9] linux/syslinux: implement ext_construct_sectmap_fs()
   5
   6 The ext_construct_sectmap_fs() constucts the sector according to the
   7 bmap.
   8
   9 Upstream-Status: Submitted
  10
  11 Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
  12 Tested-by: Du Dolpher <dolpher.du@intel.com>
  13 ---
  14  linux/syslinux.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
  15  1 file changed, 50 insertions(+)
  16
  17 diff --git a/linux/syslinux.c b/linux/syslinux.c
  18 index f0c97a8..c741750 100755
  19 --- a/linux/syslinux.c
  20 +++ b/linux/syslinux.c
  21 @@ -421,10 +421,60 @@ int install_bootblock(int fd, const char *device)
  22  {
  23  }
  24
  25 +/* The file's block count */
  26 +int block_count = 0;
  27 +static int get_block_count(ext2_filsys fs EXT2FS_ATTR((unused)),
  28 +                            blk64_t *blocknr EXT2FS_ATTR((unused)),
  29 +                            e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
  30 +                            blk64_t ref_block EXT2FS_ATTR((unused)),
  31 +                            int ref_offset EXT2FS_ATTR((unused)),
  32 +                            void *private EXT2FS_ATTR((unused)))
  33 +{
  34 +    block_count++;
  35 +    return 0;
  36 +}
  37 +
  38  /* Construct the boot file map */
  39  int ext_construct_sectmap_fs(ext2_filsys fs, ext2_ino_t newino,
  40                                  sector_t *sectors, int nsect)
  41  {
  42 +    blk64_t             pblk, blksize, blk = 0;
  43 +    sector_t            sec;
  44 +    unsigned int        i;
  45 +    int                 retval;
  46 +
  47 +    blksize = fs->blocksize;
  48 +    blksize >>= SECTOR_SHIFT;
  49 +
  50 +    /* Get the total blocks no. */
  51 +    retval = ext2fs_block_iterate3(fs, newino, BLOCK_FLAG_READ_ONLY,
  52 +            NULL, get_block_count, NULL);
  53 +    if (retval) {
  54 +        fprintf(stderr, "%s: ERROR: ext2fs_block_iterate3() failed.\n", program);
  55 +        return -1;
  56 +    }
  57 +
  58 +    while (nsect) {
  59 +        if (block_count-- == 0)
  60 +            break;
  61 +
  62 +        /* Get the physical block no. (bmap) */
  63 +        retval = ext2fs_bmap2(fs, newino, 0, 0, 0, blk, 0, &pblk);
  64 +        if (retval) {
  65 +            fprintf(stderr, "%s: ERROR: ext2fs_bmap2() failed.\n", program);
  66 +            return -1;
  67 +        }
  68 +
  69 +        blk++;
  70 +        sec = (sector_t)pblk * blksize;
  71 +        for (i = 0; i < blksize; i++) {
  72 +            *sectors++ = sec++;
  73 +            if (! --nsect)
  74 +                break;
  75 +        }
  76 +    }
  77 +
  78 +    return 0;
  79  }
  80
  81  static int handle_adv_on_ext(void)
  82 --
  83 1.9.1
  84