Initial import

1 files changed, 832 insertions, 0 deletions

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
new file mode 100644
index 000000000..658e8079a
--- /dev/null
+++ b/fs/f2fs/namei.c
@@ -0,0 +1,832 @@
+/*
+ * fs/f2fs/namei.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *             http://www.samsung.com/
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/fs.h>
+#include <linux/f2fs_fs.h>
+#include <linux/pagemap.h>
+#include <linux/sched.h>
+#include <linux/ctype.h>
+#include <linux/dcache.h>
+#include <linux/namei.h>
+
+#include "f2fs.h"
+#include "node.h"
+#include "xattr.h"
+#include "acl.h"
+#include <trace/events/f2fs.h>
+
+static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	nid_t ino;
+	struct inode *inode;
+	bool nid_free = false;
+	int err;
+
+	inode = new_inode(dir->i_sb);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+
+	f2fs_lock_op(sbi);
+	if (!alloc_nid(sbi, &ino)) {
+		f2fs_unlock_op(sbi);
+		err = -ENOSPC;
+		goto fail;
+	}
+	f2fs_unlock_op(sbi);
+
+	inode_init_owner(inode, dir, mode);
+
+	inode->i_ino = ino;
+	inode->i_blocks = 0;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME;
+	inode->i_generation = sbi->s_next_generation++;
+
+	err = insert_inode_locked(inode);
+	if (err) {
+		err = -EINVAL;
+		nid_free = true;
+		goto out;
+	}
+
+	if (f2fs_may_inline(inode))
+		set_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
+	if (test_opt(sbi, INLINE_DENTRY) && S_ISDIR(inode->i_mode))
+		set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
+
+	trace_f2fs_new_inode(inode, 0);
+	mark_inode_dirty(inode);
+	return inode;
+
+out:
+	clear_nlink(inode);
+	unlock_new_inode(inode);
+fail:
+	trace_f2fs_new_inode(inode, err);
+	make_bad_inode(inode);
+	iput(inode);
+	if (nid_free)
+		alloc_nid_failed(sbi, ino);
+	return ERR_PTR(err);
+}
+
+static int is_multimedia_file(const unsigned char *s, const char *sub)
+{
+	size_t slen = strlen(s);
+	size_t sublen = strlen(sub);
+
+	if (sublen > slen)
+		return 0;
+
+	return !strncasecmp(s + slen - sublen, sub, sublen);
+}
+
+/*
+ * Set multimedia files as cold files for hot/cold data separation
+ */
+static inline void set_cold_files(struct f2fs_sb_info *sbi, struct inode *inode,
+		const unsigned char *name)
+{
+	int i;
+	__u8 (*extlist)[8] = sbi->raw_super->extension_list;
+
+	int count = le32_to_cpu(sbi->raw_super->extension_count);
+	for (i = 0; i < count; i++) {
+		if (is_multimedia_file(name, extlist[i])) {
+			file_set_cold(inode);
+			break;
+		}
+	}
+}
+
+static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
+						bool excl)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct inode *inode;
+	nid_t ino = 0;
+	int err;
+
+	f2fs_balance_fs(sbi);
+
+	inode = f2fs_new_inode(dir, mode);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
+
+	if (!test_opt(sbi, DISABLE_EXT_IDENTIFY))
+		set_cold_files(sbi, inode, dentry->d_name.name);
+
+	inode->i_op = &f2fs_file_inode_operations;
+	inode->i_fop = &f2fs_file_operations;
+	inode->i_mapping->a_ops = &f2fs_dblock_aops;
+	ino = inode->i_ino;
+
+	f2fs_lock_op(sbi);
+	err = f2fs_add_link(dentry, inode);
+	if (err)
+		goto out;
+	f2fs_unlock_op(sbi);
+
+	alloc_nid_done(sbi, ino);
+
+	stat_inc_inline_inode(inode);
+	d_instantiate(dentry, inode);
+	unlock_new_inode(inode);
+
+	if (IS_DIRSYNC(dir))
+		f2fs_sync_fs(sbi->sb, 1);
+	return 0;
+out:
+	handle_failed_inode(inode);
+	return err;
+}
+
+static int f2fs_link(struct dentry *old_dentry, struct inode *dir,
+		struct dentry *dentry)
+{
+	struct inode *inode = d_inode(old_dentry);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	int err;
+
+	f2fs_balance_fs(sbi);
+
+	inode->i_ctime = CURRENT_TIME;
+	ihold(inode);
+
+	set_inode_flag(F2FS_I(inode), FI_INC_LINK);
+	f2fs_lock_op(sbi);
+	err = f2fs_add_link(dentry, inode);
+	if (err)
+		goto out;
+	f2fs_unlock_op(sbi);
+
+	d_instantiate(dentry, inode);
+
+	if (IS_DIRSYNC(dir))
+		f2fs_sync_fs(sbi->sb, 1);
+	return 0;
+out:
+	clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
+	iput(inode);
+	f2fs_unlock_op(sbi);
+	return err;
+}
+
+struct dentry *f2fs_get_parent(struct dentry *child)
+{
+	struct qstr dotdot = QSTR_INIT("..", 2);
+	unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot);
+	if (!ino)
+		return ERR_PTR(-ENOENT);
+	return d_obtain_alias(f2fs_iget(d_inode(child)->i_sb, ino));
+}
+
+static int __recover_dot_dentries(struct inode *dir, nid_t pino)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct qstr dot = QSTR_INIT(".", 1);
+	struct qstr dotdot = QSTR_INIT("..", 2);
+	struct f2fs_dir_entry *de;
+	struct page *page;
+	int err = 0;
+
+	f2fs_lock_op(sbi);
+
+	de = f2fs_find_entry(dir, &dot, &page);
+	if (de) {
+		f2fs_dentry_kunmap(dir, page);
+		f2fs_put_page(page, 0);
+	} else {
+		err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR);
+		if (err)
+			goto out;
+	}
+
+	de = f2fs_find_entry(dir, &dotdot, &page);
+	if (de) {
+		f2fs_dentry_kunmap(dir, page);
+		f2fs_put_page(page, 0);
+	} else {
+		err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR);
+	}
+out:
+	if (!err) {
+		clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS);
+		mark_inode_dirty(dir);
+	}
+
+	f2fs_unlock_op(sbi);
+	return err;
+}
+
+static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
+		unsigned int flags)
+{
+	struct inode *inode = NULL;
+	struct f2fs_dir_entry *de;
+	struct page *page;
+
+	if (dentry->d_name.len > F2FS_NAME_LEN)
+		return ERR_PTR(-ENAMETOOLONG);
+
+	de = f2fs_find_entry(dir, &dentry->d_name, &page);
+	if (de) {
+		nid_t ino = le32_to_cpu(de->ino);
+		f2fs_dentry_kunmap(dir, page);
+		f2fs_put_page(page, 0);
+
+		inode = f2fs_iget(dir->i_sb, ino);
+		if (IS_ERR(inode))
+			return ERR_CAST(inode);
+
+		if (f2fs_has_inline_dots(inode)) {
+			int err;
+
+			err = __recover_dot_dentries(inode, dir->i_ino);
+			if (err) {
+				iget_failed(inode);
+				return ERR_PTR(err);
+			}
+		}
+	}
+
+	return d_splice_alias(inode, dentry);
+}
+
+static int f2fs_unlink(struct inode *dir, struct dentry *dentry)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct inode *inode = d_inode(dentry);
+	struct f2fs_dir_entry *de;
+	struct page *page;
+	int err = -ENOENT;
+
+	trace_f2fs_unlink_enter(dir, dentry);
+	f2fs_balance_fs(sbi);
+
+	de = f2fs_find_entry(dir, &dentry->d_name, &page);
+	if (!de)
+		goto fail;
+
+	f2fs_lock_op(sbi);
+	err = acquire_orphan_inode(sbi);
+	if (err) {
+		f2fs_unlock_op(sbi);
+		f2fs_dentry_kunmap(dir, page);
+		f2fs_put_page(page, 0);
+		goto fail;
+	}
+	f2fs_delete_entry(de, page, dir, inode);
+	f2fs_unlock_op(sbi);
+
+	/* In order to evict this inode, we set it dirty */
+	mark_inode_dirty(inode);
+
+	if (IS_DIRSYNC(dir))
+		f2fs_sync_fs(sbi->sb, 1);
+fail:
+	trace_f2fs_unlink_exit(inode, err);
+	return err;
+}
+
+static void *f2fs_follow_link(struct dentry *dentry, struct nameidata *nd)
+{
+	struct page *page = page_follow_link_light(dentry, nd);
+
+	if (IS_ERR_OR_NULL(page))
+		return page;
+
+	/* this is broken symlink case */
+	if (*nd_get_link(nd) == 0) {
+		page_put_link(dentry, nd, page);
+		return ERR_PTR(-ENOENT);
+	}
+	return page;
+}
+
+static int f2fs_symlink(struct inode *dir, struct dentry *dentry,
+					const char *symname)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct inode *inode;
+	size_t symlen = strlen(symname) + 1;
+	int err;
+
+	f2fs_balance_fs(sbi);
+
+	inode = f2fs_new_inode(dir, S_IFLNK | S_IRWXUGO);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
+
+	inode->i_op = &f2fs_symlink_inode_operations;
+	inode->i_mapping->a_ops = &f2fs_dblock_aops;
+
+	f2fs_lock_op(sbi);
+	err = f2fs_add_link(dentry, inode);
+	if (err)
+		goto out;
+	f2fs_unlock_op(sbi);
+
+	err = page_symlink(inode, symname, symlen);
+	alloc_nid_done(sbi, inode->i_ino);
+
+	d_instantiate(dentry, inode);
+	unlock_new_inode(inode);
+
+	/*
+	 * Let's flush symlink data in order to avoid broken symlink as much as
+	 * possible. Nevertheless, fsyncing is the best way, but there is no
+	 * way to get a file descriptor in order to flush that.
+	 *
+	 * Note that, it needs to do dir->fsync to make this recoverable.
+	 * If the symlink path is stored into inline_data, there is no
+	 * performance regression.
+	 */
+	filemap_write_and_wait_range(inode->i_mapping, 0, symlen - 1);
+
+	if (IS_DIRSYNC(dir))
+		f2fs_sync_fs(sbi->sb, 1);
+	return err;
+out:
+	handle_failed_inode(inode);
+	return err;
+}
+
+static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct inode *inode;
+	int err;
+
+	f2fs_balance_fs(sbi);
+
+	inode = f2fs_new_inode(dir, S_IFDIR | mode);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
+
+	inode->i_op = &f2fs_dir_inode_operations;
+	inode->i_fop = &f2fs_dir_operations;
+	inode->i_mapping->a_ops = &f2fs_dblock_aops;
+	mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
+
+	set_inode_flag(F2FS_I(inode), FI_INC_LINK);
+	f2fs_lock_op(sbi);
+	err = f2fs_add_link(dentry, inode);
+	if (err)
+		goto out_fail;
+	f2fs_unlock_op(sbi);
+
+	stat_inc_inline_dir(inode);
+	alloc_nid_done(sbi, inode->i_ino);
+
+	d_instantiate(dentry, inode);
+	unlock_new_inode(inode);
+
+	if (IS_DIRSYNC(dir))
+		f2fs_sync_fs(sbi->sb, 1);
+	return 0;
+
+out_fail:
+	clear_inode_flag(F2FS_I(inode), FI_INC_LINK);
+	handle_failed_inode(inode);
+	return err;
+}
+
+static int f2fs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+	struct inode *inode = d_inode(dentry);
+	if (f2fs_empty_dir(inode))
+		return f2fs_unlink(dir, dentry);
+	return -ENOTEMPTY;
+}
+
+static int f2fs_mknod(struct inode *dir, struct dentry *dentry,
+				umode_t mode, dev_t rdev)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct inode *inode;
+	int err = 0;
+
+	if (!new_valid_dev(rdev))
+		return -EINVAL;
+
+	f2fs_balance_fs(sbi);
+
+	inode = f2fs_new_inode(dir, mode);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
+
+	init_special_inode(inode, inode->i_mode, rdev);
+	inode->i_op = &f2fs_special_inode_operations;
+
+	f2fs_lock_op(sbi);
+	err = f2fs_add_link(dentry, inode);
+	if (err)
+		goto out;
+	f2fs_unlock_op(sbi);
+
+	alloc_nid_done(sbi, inode->i_ino);
+
+	d_instantiate(dentry, inode);
+	unlock_new_inode(inode);
+
+	if (IS_DIRSYNC(dir))
+		f2fs_sync_fs(sbi->sb, 1);
+	return 0;
+out:
+	handle_failed_inode(inode);
+	return err;
+}
+
+static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
+			struct inode *new_dir, struct dentry *new_dentry)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
+	struct inode *old_inode = d_inode(old_dentry);
+	struct inode *new_inode = d_inode(new_dentry);
+	struct page *old_dir_page;
+	struct page *old_page, *new_page;
+	struct f2fs_dir_entry *old_dir_entry = NULL;
+	struct f2fs_dir_entry *old_entry;
+	struct f2fs_dir_entry *new_entry;
+	int err = -ENOENT;
+
+	f2fs_balance_fs(sbi);
+
+	old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
+	if (!old_entry)
+		goto out;
+
+	if (S_ISDIR(old_inode->i_mode)) {
+		err = -EIO;
+		old_dir_entry = f2fs_parent_dir(old_inode, &old_dir_page);
+		if (!old_dir_entry)
+			goto out_old;
+	}
+
+	if (new_inode) {
+
+		err = -ENOTEMPTY;
+		if (old_dir_entry && !f2fs_empty_dir(new_inode))
+			goto out_dir;
+
+		err = -ENOENT;
+		new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name,
+						&new_page);
+		if (!new_entry)
+			goto out_dir;
+
+		f2fs_lock_op(sbi);
+
+		err = acquire_orphan_inode(sbi);
+		if (err)
+			goto put_out_dir;
+
+		if (update_dent_inode(old_inode, &new_dentry->d_name)) {
+			release_orphan_inode(sbi);
+			goto put_out_dir;
+		}
+
+		f2fs_set_link(new_dir, new_entry, new_page, old_inode);
+
+		new_inode->i_ctime = CURRENT_TIME;
+		down_write(&F2FS_I(new_inode)->i_sem);
+		if (old_dir_entry)
+			drop_nlink(new_inode);
+		drop_nlink(new_inode);
+		up_write(&F2FS_I(new_inode)->i_sem);
+
+		mark_inode_dirty(new_inode);
+
+		if (!new_inode->i_nlink)
+			add_orphan_inode(sbi, new_inode->i_ino);
+		else
+			release_orphan_inode(sbi);
+
+		update_inode_page(old_inode);
+		update_inode_page(new_inode);
+	} else {
+		f2fs_lock_op(sbi);
+
+		err = f2fs_add_link(new_dentry, old_inode);
+		if (err) {
+			f2fs_unlock_op(sbi);
+			goto out_dir;
+		}
+
+		if (old_dir_entry) {
+			inc_nlink(new_dir);
+			update_inode_page(new_dir);
+		}
+	}
+
+	down_write(&F2FS_I(old_inode)->i_sem);
+	file_lost_pino(old_inode);
+	up_write(&F2FS_I(old_inode)->i_sem);
+
+	old_inode->i_ctime = CURRENT_TIME;
+	mark_inode_dirty(old_inode);
+
+	f2fs_delete_entry(old_entry, old_page, old_dir, NULL);
+
+	if (old_dir_entry) {
+		if (old_dir != new_dir) {
+			f2fs_set_link(old_inode, old_dir_entry,
+						old_dir_page, new_dir);
+			update_inode_page(old_inode);
+		} else {
+			f2fs_dentry_kunmap(old_inode, old_dir_page);
+			f2fs_put_page(old_dir_page, 0);
+		}
+		drop_nlink(old_dir);
+		mark_inode_dirty(old_dir);
+		update_inode_page(old_dir);
+	}
+
+	f2fs_unlock_op(sbi);
+
+	if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
+		f2fs_sync_fs(sbi->sb, 1);
+	return 0;
+
+put_out_dir:
+	f2fs_unlock_op(sbi);
+	f2fs_dentry_kunmap(new_dir, new_page);
+	f2fs_put_page(new_page, 0);
+out_dir:
+	if (old_dir_entry) {
+		f2fs_dentry_kunmap(old_inode, old_dir_page);
+		f2fs_put_page(old_dir_page, 0);
+	}
+out_old:
+	f2fs_dentry_kunmap(old_dir, old_page);
+	f2fs_put_page(old_page, 0);
+out:
+	return err;
+}
+
+static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
+			     struct inode *new_dir, struct dentry *new_dentry)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir);
+	struct inode *old_inode = d_inode(old_dentry);
+	struct inode *new_inode = d_inode(new_dentry);
+	struct page *old_dir_page, *new_dir_page;
+	struct page *old_page, *new_page;
+	struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL;
+	struct f2fs_dir_entry *old_entry, *new_entry;
+	int old_nlink = 0, new_nlink = 0;
+	int err = -ENOENT;
+
+	f2fs_balance_fs(sbi);
+
+	old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page);
+	if (!old_entry)
+		goto out;
+
+	new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page);
+	if (!new_entry)
+		goto out_old;
+
+	/* prepare for updating ".." directory entry info later */
+	if (old_dir != new_dir) {
+		if (S_ISDIR(old_inode->i_mode)) {
+			err = -EIO;
+			old_dir_entry = f2fs_parent_dir(old_inode,
+							&old_dir_page);
+			if (!old_dir_entry)
+				goto out_new;
+		}
+
+		if (S_ISDIR(new_inode->i_mode)) {
+			err = -EIO;
+			new_dir_entry = f2fs_parent_dir(new_inode,
+							&new_dir_page);
+			if (!new_dir_entry)
+				goto out_old_dir;
+		}
+	}
+
+	/*
+	 * If cross rename between file and directory those are not
+	 * in the same directory, we will inc nlink of file's parent
+	 * later, so we should check upper boundary of its nlink.
+	 */
+	if ((!old_dir_entry || !new_dir_entry) &&
+				old_dir_entry != new_dir_entry) {
+		old_nlink = old_dir_entry ? -1 : 1;
+		new_nlink = -old_nlink;
+		err = -EMLINK;
+		if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) ||
+			(new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX))
+			goto out_new_dir;
+	}
+
+	f2fs_lock_op(sbi);
+
+	err = update_dent_inode(old_inode, &new_dentry->d_name);
+	if (err)
+		goto out_unlock;
+
+	err = update_dent_inode(new_inode, &old_dentry->d_name);
+	if (err)
+		goto out_undo;
+
+	/* update ".." directory entry info of old dentry */
+	if (old_dir_entry)
+		f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir);
+
+	/* update ".." directory entry info of new dentry */
+	if (new_dir_entry)
+		f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir);
+
+	/* update directory entry info of old dir inode */
+	f2fs_set_link(old_dir, old_entry, old_page, new_inode);
+
+	down_write(&F2FS_I(old_inode)->i_sem);
+	file_lost_pino(old_inode);
+	up_write(&F2FS_I(old_inode)->i_sem);
+
+	update_inode_page(old_inode);
+
+	old_dir->i_ctime = CURRENT_TIME;
+	if (old_nlink) {
+		down_write(&F2FS_I(old_dir)->i_sem);
+		if (old_nlink < 0)
+			drop_nlink(old_dir);
+		else
+			inc_nlink(old_dir);
+		up_write(&F2FS_I(old_dir)->i_sem);
+	}
+	mark_inode_dirty(old_dir);
+	update_inode_page(old_dir);
+
+	/* update directory entry info of new dir inode */
+	f2fs_set_link(new_dir, new_entry, new_page, old_inode);
+
+	down_write(&F2FS_I(new_inode)->i_sem);
+	file_lost_pino(new_inode);
+	up_write(&F2FS_I(new_inode)->i_sem);
+
+	update_inode_page(new_inode);
+
+	new_dir->i_ctime = CURRENT_TIME;
+	if (new_nlink) {
+		down_write(&F2FS_I(new_dir)->i_sem);
+		if (new_nlink < 0)
+			drop_nlink(new_dir);
+		else
+			inc_nlink(new_dir);
+		up_write(&F2FS_I(new_dir)->i_sem);
+	}
+	mark_inode_dirty(new_dir);
+	update_inode_page(new_dir);
+
+	f2fs_unlock_op(sbi);
+
+	if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir))
+		f2fs_sync_fs(sbi->sb, 1);
+	return 0;
+out_undo:
+	/* Still we may fail to recover name info of f2fs_inode here */
+	update_dent_inode(old_inode, &old_dentry->d_name);
+out_unlock:
+	f2fs_unlock_op(sbi);
+out_new_dir:
+	if (new_dir_entry) {
+		f2fs_dentry_kunmap(new_inode, new_dir_page);
+		f2fs_put_page(new_dir_page, 0);
+	}
+out_old_dir:
+	if (old_dir_entry) {
+		f2fs_dentry_kunmap(old_inode, old_dir_page);
+		f2fs_put_page(old_dir_page, 0);
+	}
+out_new:
+	f2fs_dentry_kunmap(new_dir, new_page);
+	f2fs_put_page(new_page, 0);
+out_old:
+	f2fs_dentry_kunmap(old_dir, old_page);
+	f2fs_put_page(old_page, 0);
+out:
+	return err;
+}
+
+static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry,
+			struct inode *new_dir, struct dentry *new_dentry,
+			unsigned int flags)
+{
+	if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE))
+		return -EINVAL;
+
+	if (flags & RENAME_EXCHANGE) {
+		return f2fs_cross_rename(old_dir, old_dentry,
+					 new_dir, new_dentry);
+	}
+	/*
+	 * VFS has already handled the new dentry existence case,
+	 * here, we just deal with "RENAME_NOREPLACE" as regular rename.
+	 */
+	return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry);
+}
+
+static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
+	struct inode *inode;
+	int err;
+
+	inode = f2fs_new_inode(dir, mode);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
+
+	inode->i_op = &f2fs_file_inode_operations;
+	inode->i_fop = &f2fs_file_operations;
+	inode->i_mapping->a_ops = &f2fs_dblock_aops;
+
+	f2fs_lock_op(sbi);
+	err = acquire_orphan_inode(sbi);
+	if (err)
+		goto out;
+
+	err = f2fs_do_tmpfile(inode, dir);
+	if (err)
+		goto release_out;
+
+	/*
+	 * add this non-linked tmpfile to orphan list, in this way we could
+	 * remove all unused data of tmpfile after abnormal power-off.
+	 */
+	add_orphan_inode(sbi, inode->i_ino);
+	f2fs_unlock_op(sbi);
+
+	alloc_nid_done(sbi, inode->i_ino);
+
+	stat_inc_inline_inode(inode);
+	d_tmpfile(dentry, inode);
+	unlock_new_inode(inode);
+	return 0;
+
+release_out:
+	release_orphan_inode(sbi);
+out:
+	handle_failed_inode(inode);
+	return err;
+}
+
+const struct inode_operations f2fs_dir_inode_operations = {
+	.create		= f2fs_create,
+	.lookup		= f2fs_lookup,
+	.link		= f2fs_link,
+	.unlink		= f2fs_unlink,
+	.symlink	= f2fs_symlink,
+	.mkdir		= f2fs_mkdir,
+	.rmdir		= f2fs_rmdir,
+	.mknod		= f2fs_mknod,
+	.rename2	= f2fs_rename2,
+	.tmpfile	= f2fs_tmpfile,
+	.getattr	= f2fs_getattr,
+	.setattr	= f2fs_setattr,
+	.get_acl	= f2fs_get_acl,
+	.set_acl	= f2fs_set_acl,
+#ifdef CONFIG_F2FS_FS_XATTR
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
+	.listxattr	= f2fs_listxattr,
+	.removexattr	= generic_removexattr,
+#endif
+};
+
+const struct inode_operations f2fs_symlink_inode_operations = {
+	.readlink       = generic_readlink,
+	.follow_link    = f2fs_follow_link,
+	.put_link       = page_put_link,
+	.getattr	= f2fs_getattr,
+	.setattr	= f2fs_setattr,
+#ifdef CONFIG_F2FS_FS_XATTR
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
+	.listxattr	= f2fs_listxattr,
+	.removexattr	= generic_removexattr,
+#endif
+};
+
+const struct inode_operations f2fs_special_inode_operations = {
+	.getattr	= f2fs_getattr,
+	.setattr        = f2fs_setattr,
+	.get_acl	= f2fs_get_acl,
+	.set_acl	= f2fs_set_acl,
+#ifdef CONFIG_F2FS_FS_XATTR
+	.setxattr       = generic_setxattr,
+	.getxattr       = generic_getxattr,
+	.listxattr	= f2fs_listxattr,
+	.removexattr    = generic_removexattr,
+#endif
+};