lustre/kernel_patches/patches/ext3-map_inode_page-2.6.0.patch

   1  fs/ext3/inode.c |   52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
   2  fs/ext3/super.c |    3 +++
   3  2 files changed, 55 insertions(+)
   4
   5 --- linux-2.6.0-test6/fs/ext3/inode.c~ext3-map_inode_page-2.6.0 2003-10-14 17:03:48.000000000 +0400
   6 +++ linux-2.6.0-test6-alexey/fs/ext3/inode.c    2003-10-14 17:03:49.000000000 +0400
   7 @@ -3143,3 +3143,55 @@ int ext3_prep_san_write(struct inode *in
   8                 ret = ret2;
   9         return ret;
  10  }
  11 +
  12 +int ext3_map_inode_page(struct inode *inode, struct page *page,
  13 +                        unsigned long *blocks, int *created, int create)
  14 +{
  15 +        unsigned int blocksize, blocks_per_page;
  16 +        unsigned long iblock;
  17 +        struct buffer_head dummy;
  18 +        void *handle;
  19 +        int i, rc = 0, failed = 0, needed_blocks;
  20 +
  21 +        blocksize = inode->i_sb->s_blocksize;
  22 +        blocks_per_page = PAGE_SIZE >> inode->i_sb->s_blocksize_bits;
  23 +        iblock = page->index * blocks_per_page;
  24 +
  25 +        for (i = 0; i < blocks_per_page; i++, iblock++) {
  26 +                blocks[i] = ext3_bmap(inode->i_mapping, iblock);
  27 +                if (blocks[i] == 0) {
  28 +                        failed++;
  29 +                        created[i] = -1;
  30 +                } else {
  31 +                        created[i] = 0;
  32 +                }
  33 +        }
  34 +
  35 +        if (failed == 0 || create == 0)
  36 +                return 0;
  37 +
  38 +        needed_blocks = ext3_writepage_trans_blocks(inode);
  39 +        handle = ext3_journal_start(inode, needed_blocks);
  40 +        if (IS_ERR(handle))
  41 +                return PTR_ERR(handle);
  42 +
  43 +        iblock = page->index * blocks_per_page;
  44 +        for (i = 0; i < blocks_per_page; i++, iblock++) {
  45 +                if (blocks[i] != 0)
  46 +                        continue;
  47 +
  48 +                rc = ext3_get_block_handle(handle, inode, iblock, &dummy, 1, 1);
  49 +                if (rc) {
  50 +                        printk(KERN_INFO "ext3_map_inode_page: error reading "
  51 +                               "block %ld\n", iblock);
  52 +                        goto out;
  53 +                }
  54 +                blocks[i] = dummy.b_blocknr;
  55 +                created[i] = 1;
  56 +        }
  57 +
  58 + out:
  59 +       ext3_journal_stop(handle);
  60 +        return rc;
  61 +}
  62 +
  63 --- linux-2.6.0-test6/fs/ext3/super.c~ext3-map_inode_page-2.6.0 2003-10-14 17:03:48.000000000 +0400
  64 +++ linux-2.6.0-test6-alexey/fs/ext3/super.c    2003-10-14 17:09:05.000000000 +0400
  65 @@ -2043,6 +2043,9 @@ static void __exit exit_ext3_fs(void)
  66  int ext3_prep_san_write(struct inode *inode, long *blocks,
  67                          int nblocks, loff_t newsize);
  68  EXPORT_SYMBOL(ext3_prep_san_write);
  69 +int ext3_map_inode_page(struct inode *inode, struct page *page,
  70 +                        unsigned long *blocks, int *created, int create);
  71 +EXPORT_SYMBOL(ext3_map_inode_page);
  72
  73  MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
  74  MODULE_DESCRIPTION("Second Extended Filesystem with journaling extensions");
  75
  76 _