2 * mkdir.c --- make a directory in the filesystem
4 * Copyright (C) 1994, 1995 Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
23 #include <sys/types.h>
33 errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
37 struct ext2_inode parent_inode, inode;
38 ext2_ino_t ino = inum;
39 ext2_ino_t scratch_ino;
43 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
46 * Allocate an inode, if necessary
49 retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
56 * Allocate a data block for the directory
58 retval = ext2fs_new_block(fs, 0, 0, &blk);
63 * Create a scratch template for the directory
65 retval = ext2fs_new_dir_block(fs, ino, parent, &block);
70 * Get the parent's inode, if necessary
73 retval = ext2fs_read_inode(fs, parent, &parent_inode);
77 memset(&parent_inode, 0, sizeof(parent_inode));
80 * Create the inode structure....
82 memset(&inode, 0, sizeof(struct ext2_inode));
83 inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
84 inode.i_uid = inode.i_gid = 0;
85 ext2fs_iblk_set(fs, &inode, 1);
86 inode.i_block[0] = blk;
87 inode.i_links_count = 2;
88 inode.i_size = fs->blocksize;
91 * Write out the inode and inode data block
93 retval = ext2fs_write_dir_block(fs, blk, block);
96 retval = ext2fs_write_new_inode(fs, ino, &inode);
101 * Link the directory into the filesystem hierarchy
104 retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
107 retval = EXT2_ET_DIR_EXISTS;
111 if (retval != EXT2_ET_FILE_NOT_FOUND)
113 retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
119 * Update parent inode's counts
122 parent_inode.i_links_count++;
123 retval = ext2fs_write_inode(fs, parent, &parent_inode);
129 * Update accounting....
131 ext2fs_block_alloc_stats(fs, blk, +1);
132 ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
136 ext2fs_free_mem(&block);