linux-kernel - Re: [f2fs-dev] [PATCH v2] f2fs: retry to update the inode page given EIO

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <bb9a9d1a-0d4c-b27e-e724-f99d5b8b4283@kernel.org>
Date:   Thu, 12 Jan 2023 18:14:24 +0800
From:   Chao Yu <chao@...nel.org>
To:     Jaegeuk Kim <jaegeuk@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net, stable@...r.kernel.org
Subject: Re: [f2fs-dev] [PATCH v2] f2fs: retry to update the inode page given
 EIO

On 2023/1/12 2:50, Jaegeuk Kim wrote:
> On 01/11, Chao Yu wrote:
>> On 2023/1/11 9:20, Jaegeuk Kim wrote:
>>> In f2fs_update_inode_page, f2fs_get_node_page handles EIO along with
>>> f2fs_handle_page_eio that stops checkpoint, if the disk couldn't be recovered.
>>> As a result, we don't need to stop checkpoint right away given single EIO.
>>
>> f2fs_handle_page_eio() only covers the case that EIO occurs on the same
>> page, should we cover the case EIO occurs on different pages?
> 
> Which case are you looking at?

- __get_node_page(PageA)		- __get_node_page(PageB)
  - f2fs_handle_page_eio
   - sbi->page_eio_ofs[type] = PageA->index
					 - f2fs_handle_page_eio
					  - sbi->page_eio_ofs[type] = PageB->index

In such race case, it may has low probability to set CP_ERROR_FLAG as we expect?

Thanks,

> 
>>
>> Thanks,
>>
>>>
>>> Cc: stable@...r.kernel.org
>>> Signed-off-by: Randall Huang <huangrandall@...gle.com>
>>> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
>>> ---
>>>
>>>    Change log from v1:
>>>     - fix a bug
>>>
>>>    fs/f2fs/inode.c | 2 +-
>>>    1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
>>> index ff6cf66ed46b..2ed7a621fdf1 100644
>>> --- a/fs/f2fs/inode.c
>>> +++ b/fs/f2fs/inode.c
>>> @@ -719,7 +719,7 @@ void f2fs_update_inode_page(struct inode *inode)
>>>    	if (IS_ERR(node_page)) {
>>>    		int err = PTR_ERR(node_page);
>>> -		if (err == -ENOMEM) {
>>> +		if (err == -ENOMEM || (err == -EIO && !f2fs_cp_error(sbi))) {
>>>    			cond_resched();
>>>    			goto retry;
>>>    		} else if (err != -ENOENT) {