ext4: ->tmpfile() support (af51a2ac) · Commits · e / devices / android_kernel_oneplus_sm7250

fs/ext4/namei.c

+46 −1

Original line number	Diff line number	Diff line
		@@ -2299,6 +2299,45 @@ static int ext4_mknod(struct inode dir, struct dentry dentry,
		return err;
		}

		static int ext4_tmpfile(struct inode dir, struct dentry dentry, umode_t mode)
		{
		handle_t *handle;
		struct inode *inode;
		int err, retries = 0;

		dquot_initialize(dir);

		retry:
		inode = ext4_new_inode_start_handle(dir, mode,
		NULL, 0, NULL,
		EXT4_HT_DIR,
		EXT4_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) +
		4 + EXT4_XATTR_TRANS_BLOCKS);
		handle = ext4_journal_current_handle();
		err = PTR_ERR(inode);
		if (!IS_ERR(inode)) {
		inode->i_op = &ext4_file_inode_operations;
		inode->i_fop = &ext4_file_operations;
		ext4_set_aops(inode);
		err = ext4_orphan_add(handle, inode);
		if (err)
		goto err_drop_inode;
		mark_inode_dirty(inode);
		d_tmpfile(dentry, inode);
		unlock_new_inode(inode);
		}
		if (handle)
		ext4_journal_stop(handle);
		if (err == -ENOSPC && ext4_should_retry_alloc(dir->i_sb, &retries))
		goto retry;
		return err;
		err_drop_inode:
		ext4_journal_stop(handle);
		unlock_new_inode(inode);
		iput(inode);
		return err;
		}

		struct ext4_dir_entry_2 ext4_init_dot_dotdot(struct inode inode,
		struct ext4_dir_entry_2 *de,
		int blocksize, int csum_size,
		@@ -2906,7 +2945,7 @@ static int ext4_link(struct dentry *old_dentry,
		retry:
		handle = ext4_journal_start(dir, EXT4_HT_DIR,
		(EXT4_DATA_TRANS_BLOCKS(dir->i_sb) +
		EXT4_INDEX_EXTRA_TRANS_BLOCKS));
		EXT4_INDEX_EXTRA_TRANS_BLOCKS) + 1);
		if (IS_ERR(handle))
		return PTR_ERR(handle);

		@@ -2920,6 +2959,11 @@ static int ext4_link(struct dentry *old_dentry,
		err = ext4_add_entry(handle, dentry, inode);
		if (!err) {
		ext4_mark_inode_dirty(handle, inode);
		/* this can happen only for tmpfile being
		* linked the first time
		*/
		if (inode->i_nlink == 1)
		ext4_orphan_del(handle, inode);
		d_instantiate(dentry, inode);
		} else {
		drop_nlink(inode);
		@@ -3172,6 +3216,7 @@ const struct inode_operations ext4_dir_inode_operations = {
		.mkdir = ext4_mkdir,
		.rmdir = ext4_rmdir,
		.mknod = ext4_mknod,
		.tmpfile = ext4_tmpfile,
		.rename = ext4_rename,
		.setattr = ext4_setattr,
		.setxattr = generic_setxattr,