Adding upstream version 1.47.0.upstream/1.47.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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;
+
+}
+
+