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- /*
- * mkdir.c --- make a directory in the filesystem
- *
- * Copyright (C) 1994 Theodore Ts'o. This file may be redistributed
- * under the terms of the GNU Public License.
- */
-
- #include <stdio.h>
- #include <string.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <fcntl.h>
- #include <time.h>
- #include <sys/stat.h>
- #include <errno.h>
- #include <sys/types.h>
-
- #include <linux/ext2_fs.h>
-
- #include "ext2fs.h"
-
- errcode_t ext2fs_mkdir(ext2_filsys fs, ino_t parent, ino_t inum,
- const char *name)
- {
- errcode_t retval;
- struct ext2_inode inode;
- ino_t ino = inum;
- ino_t scratch_ino;
- blk_t blk;
- char *block = 0;
- int group;
-
- EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
-
- /*
- * Allocate an inode, if necessary
- */
- if (!ino) {
- retval = ext2fs_new_inode(fs, parent, S_IFDIR | 0755, 0, &ino);
- if (retval)
- goto cleanup;
- }
-
- /*
- * Allocate a data block for the directory
- */
- retval = ext2fs_new_block(fs, 0, 0, &blk);
- if (retval)
- goto cleanup;
-
- /*
- * Create a scratch template for the directory
- */
- retval = ext2fs_new_dir_block(fs, ino, parent, &block);
- if (retval)
- goto cleanup;
-
- /*
- * Create the inode structure....
- */
- memset(&inode, 0, sizeof(struct ext2_inode));
- inode.i_mode = S_IFDIR | 0755;
- inode.i_uid = inode.i_gid = 0;
- inode.i_blocks = fs->blocksize / 512;
- inode.i_block[0] = blk;
- inode.i_links_count = 2;
- inode.i_ctime = inode.i_atime = inode.i_mtime = time(NULL);
- inode.i_size = fs->blocksize;
-
- /*
- * Write out the inode and inode data block
- */
- retval = io_channel_write_blk(fs->io, blk, 1, block);
- if (retval)
- goto cleanup;
- retval = ext2fs_write_inode(fs, ino, &inode);
- if (retval)
- goto cleanup;
-
- /*
- * Update parent inode's counts
- */
- if (parent != ino) {
- retval = ext2fs_read_inode(fs, parent, &inode);
- if (retval)
- goto cleanup;
- inode.i_links_count++;
- retval = ext2fs_write_inode(fs, parent, &inode);
- if (retval)
- goto cleanup;
- }
-
- /*
- * Link the directory into the filesystem hierarchy
- */
- if (name) {
- retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
- &scratch_ino);
- if (!retval) {
- retval = EEXIST;
- name = 0;
- goto cleanup;
- }
- if (retval != ENOENT)
- goto cleanup;
- retval = ext2fs_link(fs, parent, name, ino, 0);
- if (retval)
- goto cleanup;
- }
-
- /*
- * Update accounting....
- */
- ext2fs_mark_block_bitmap(fs->block_map, blk);
- ext2fs_mark_bb_dirty(fs);
- ext2fs_mark_inode_bitmap(fs->inode_map, ino);
- ext2fs_mark_ib_dirty(fs);
-
- group = ext2fs_group_of_blk(fs, blk);
- fs->group_desc[group].bg_free_blocks_count--;
- group = ext2fs_group_of_ino(fs, ino);
- fs->group_desc[group].bg_free_inodes_count--;
- fs->group_desc[group].bg_used_dirs_count++;
- fs->super->s_free_blocks_count--;
- fs->super->s_free_inodes_count--;
- ext2fs_mark_super_dirty(fs);
-
- cleanup:
- if (block)
- free(block);
- return retval;
-
- }
-
-
-