path: root/fs/f2fs/namei.c

// SPDX-License-Identifier: GPL-2.0
/*
 * fs/f2fs/namei.c
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
 *             http://www.samsung.com/
 */
#include <linux/fs.h>
#include <linux/f2fs_fs.h>
#include <linux/pagemap.h>
#include <linux/sched.h>
#include <linux/ctype.h>
#include <linux/random.h>
#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/quotaops.h>

#include "f2fs.h"
#include "node.h"
#include "segment.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;
	bool encrypt = false;
	int xattr_size = 0;
	int err;

	inode = new_inode(dir->i_sb);
	if (!inode)
		return ERR_PTR(-ENOMEM);

	f2fs_lock_op(sbi);
	if (!f2fs_alloc_nid(sbi, &ino)) {
		f2fs_unlock_op(sbi);
		err = -ENOSPC;
		goto fail;
	}
	f2fs_unlock_op(sbi);

	nid_free = true;

	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);
	F2FS_I(inode)->i_crtime = inode->i_mtime;
	inode->i_generation = prandom_u32();

	if (S_ISDIR(inode->i_mode))
		F2FS_I(inode)->i_current_depth = 1;

	err = insert_inode_locked(inode);
	if (err) {
		err = -EINVAL;
		goto fail;
	}

	if (f2fs_sb_has_project_quota(sbi) &&
		(F2FS_I(dir)->i_flags & F2FS_PROJINHERIT_FL))
		F2FS_I(inode)->i_projid = F2FS_I(dir)->i_projid;
	else
		F2FS_I(inode)->i_projid = make_kprojid(&init_user_ns,
							F2FS_DEF_PROJID);

	err = fscrypt_prepare_new_inode(dir, inode, &encrypt);
	if (err)
		goto fail_drop;

	err = dquot_initialize(inode);
	if (err)
		goto fail_drop;

	set_inode_flag(inode, FI_NEW_INODE);

	if (encrypt)
		f2fs_set_encrypted_inode(inode);

	if (f2fs_sb_has_extra_attr(sbi)) {
		set_inode_flag(