1 /* vi: set sw=4 ts=4: */
3 * expand.c --- expand an ext2fs directory
5 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999 Theodore Ts'o.
8 * This file may be redistributed under the terms of the GNU Public
22 struct expand_dir_struct
{
28 static int expand_dir_proc(ext2_filsys fs
,
31 blk_t ref_block
EXT2FS_ATTR((unused
)),
32 int ref_offset
EXT2FS_ATTR((unused
)),
35 struct expand_dir_struct
*es
= (struct expand_dir_struct
*) priv_data
;
37 static blk_t last_blk
= 0;
45 retval
= ext2fs_new_block(fs
, last_blk
, 0, &new_blk
);
51 retval
= ext2fs_new_dir_block(fs
, 0, 0, &block
);
57 retval
= ext2fs_write_dir_block(fs
, new_blk
, block
);
59 retval
= ext2fs_get_mem(fs
->blocksize
, &block
);
64 memset(block
, 0, fs
->blocksize
);
65 retval
= io_channel_write_blk(fs
->io
, new_blk
, 1, block
);
71 ext2fs_free_mem(&block
);
73 ext2fs_block_alloc_stats(fs
, new_blk
, +1);
77 return (BLOCK_CHANGED
| BLOCK_ABORT
);
82 errcode_t
ext2fs_expand_dir(ext2_filsys fs
, ext2_ino_t dir
)
85 struct expand_dir_struct es
;
86 struct ext2_inode inode
;
88 EXT2_CHECK_MAGIC(fs
, EXT2_ET_MAGIC_EXT2FS_FILSYS
);
90 if (!(fs
->flags
& EXT2_FLAG_RW
))
91 return EXT2_ET_RO_FILSYS
;
94 return EXT2_ET_NO_BLOCK_BITMAP
;
96 retval
= ext2fs_check_directory(fs
, dir
);
104 retval
= ext2fs_block_iterate2(fs
, dir
, BLOCK_FLAG_APPEND
,
105 0, expand_dir_proc
, &es
);
110 return EXT2_ET_EXPAND_DIR_ERR
;
113 * Update the size and block count fields in the inode.
115 retval
= ext2fs_read_inode(fs
, dir
, &inode
);
119 inode
.i_size
+= fs
->blocksize
;
120 inode
.i_blocks
+= (fs
->blocksize
/ 512) * es
.newblocks
;
122 retval
= ext2fs_write_inode(fs
, dir
, &inode
);