Unverified Commit 791f8e09 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!4816 [sync] PR-4702: efivarfs: force RO when remounting if SetVariable is not supported 

Merge Pull Request from: @openeuler-sync-bot 
 

Origin pull request: 
https://gitee.com/openeuler/kernel/pulls/4702 
 
PR sync from: Zhihao Cheng <chengzhihao1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/EOYIAGJDU3XWUK5Z4GO7463OVQH6G3YQ/ 
 
https://gitee.com/src-openeuler/kernel/issues/I93EC7 
 
Link:https://gitee.com/openeuler/kernel/pulls/4816

 

Reviewed-by: default avatarzhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents 13ec727f 6751653d

fs/efivarfs/super.c

+12 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ 
#include <linux/ucs2_string.h>

#include <linux/slab.h>

#include <linux/magic.h>

#include <linux/printk.h>



#include "internal.h"
@@ -231,8 +232,19 @@ static int efivarfs_get_tree(struct fs_context *fc) 
	return get_tree_single(fc, efivarfs_fill_super);

}



static int efivarfs_reconfigure(struct fs_context *fc)

{

	if (!efivar_supports_writes() && !(fc->sb_flags & SB_RDONLY)) {

		pr_err("Firmware does not support SetVariableRT. Can not remount with rw\n");

		return -EINVAL;

	}



	return 0;

}



static const struct fs_context_operations efivarfs_context_ops = {

	.get_tree	= efivarfs_get_tree,

	.reconfigure	= efivarfs_reconfigure,

};



static int efivarfs_init_fs_context(struct fs_context *fc)