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-rw-r--r--lib/ext2fs/mkdir.c200
1 files changed, 200 insertions, 0 deletions
diff --git a/lib/ext2fs/mkdir.c b/lib/ext2fs/mkdir.c
new file mode 100644
index 0000000..437c8ff
--- /dev/null
+++ b/lib/ext2fs/mkdir.c
@@ -0,0 +1,200 @@
+/*
+ * mkdir.c --- make a directory in the filesystem
+ *
+ * Copyright (C) 1994, 1995 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <time.h>
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+#include "ext2fsP.h"
+
+#ifndef EXT2_FT_DIR
+#define EXT2_FT_DIR 2
+#endif
+
+errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
+ const char *name)
+{
+ ext2_extent_handle_t handle;
+ errcode_t retval;
+ struct ext2_inode parent_inode, inode;
+ ext2_ino_t ino = inum;
+ ext2_ino_t scratch_ino;
+ blk64_t blk;
+ char *block = 0;
+ int inline_data = 0;
+ int drop_refcount = 0;
+
+ EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
+
+ /*
+ * Create a new dir with inline data iff this feature is enabled
+ * and ino >= EXT2_FIRST_INO.
+ */
+ if ((!ino || ino >= EXT2_FIRST_INO(fs->super)) &&
+ ext2fs_has_feature_inline_data(fs->super))
+ inline_data = 1;
+
+ /*
+ * Allocate an inode, if necessary
+ */
+ if (!ino) {
+ retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
+ 0, &ino);
+ if (retval)
+ goto cleanup;
+ }
+
+ /*
+ * Allocate a data block for the directory
+ */
+ memset(&inode, 0, sizeof(struct ext2_inode));
+ if (!inline_data) {
+ retval = ext2fs_new_block2(fs, ext2fs_find_inode_goal(fs, ino,
+ &inode,
+ 0),
+ NULL, &blk);
+ if (retval)
+ goto cleanup;
+ }
+
+ /*
+ * Create a scratch template for the directory
+ */
+ if (inline_data)
+ retval = ext2fs_new_dir_inline_data(fs, ino, parent,
+ inode.i_block);
+ else
+ retval = ext2fs_new_dir_block(fs, ino, parent, &block);
+ if (retval)
+ goto cleanup;
+
+ /*
+ * Get the parent's inode, if necessary
+ */
+ if (parent != ino) {
+ retval = ext2fs_read_inode(fs, parent, &parent_inode);
+ if (retval)
+ goto cleanup;
+ } else
+ memset(&parent_inode, 0, sizeof(parent_inode));
+
+ /*
+ * Create the inode structure....
+ */
+ inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
+ inode.i_uid = inode.i_gid = 0;
+ if (inline_data) {
+ inode.i_flags |= EXT4_INLINE_DATA_FL;
+ inode.i_size = EXT4_MIN_INLINE_DATA_SIZE;
+ } else {
+ if (ext2fs_has_feature_extents(fs->super))
+ inode.i_flags |= EXT4_EXTENTS_FL;
+ else
+ inode.i_block[0] = blk;
+ inode.i_size = fs->blocksize;
+ ext2fs_iblk_set(fs, &inode, 1);
+ }
+ inode.i_links_count = 2;
+
+ /*
+ * Write out the inode and inode data block. The inode generation
+ * number is assigned by write_new_inode, which means that the call
+ * to write_dir_block must come after that.
+ */
+ retval = ext2fs_write_new_inode(fs, ino, &inode);
+ if (retval)
+ goto cleanup;
+ if (inline_data) {
+ /* init "system.data" for new dir */
+ retval = ext2fs_inline_data_init(fs, ino);
+ } else {
+ retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
+ if (retval)
+ goto cleanup;
+
+ if (ext2fs_has_feature_extents(fs->super)) {
+ retval = ext2fs_extent_open2(fs, ino, &inode, &handle);
+ if (retval)
+ goto cleanup;
+ retval = ext2fs_extent_set_bmap(handle, 0, blk, 0);
+ ext2fs_extent_free(handle);
+ if (retval)
+ goto cleanup;
+ }
+ }
+
+ /*
+ * Update accounting....
+ */
+ if (!inline_data)
+ ext2fs_block_alloc_stats2(fs, blk, +1);
+ ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
+ drop_refcount = 1;
+
+ /*
+ * Link the directory into the filesystem hierarchy
+ */
+ if (name) {
+ retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
+ &scratch_ino);
+ if (!retval) {
+ retval = EXT2_ET_DIR_EXISTS;
+ name = 0;
+ goto cleanup;
+ }
+ if (retval != EXT2_ET_FILE_NOT_FOUND)
+ goto cleanup;
+ retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
+ if (retval)
+ goto cleanup;
+ }
+
+ /*
+ * Update parent inode's counts
+ */
+ if (parent != ino) {
+ /* reload parent inode due to inline data */
+ retval = ext2fs_read_inode(fs, parent, &parent_inode);
+ if (retval)
+ goto cleanup;
+ parent_inode.i_links_count++;
+ retval = ext2fs_write_inode(fs, parent, &parent_inode);
+ if (retval)
+ goto cleanup;
+ }
+ drop_refcount = 0;
+
+cleanup:
+ if (block)
+ ext2fs_free_mem(&block);
+ if (drop_refcount) {
+ if (!inline_data)
+ ext2fs_block_alloc_stats2(fs, blk, -1);
+ ext2fs_inode_alloc_stats2(fs, ino, -1, 1);
+ }
+ return retval;
+
+}
+
+