2023-10-13 10:59:52

by Zhiguo Niu

[permalink] [raw]
Subject: [PATCH] f2fs: fix error path of __f2fs_build_free_nids

SBI_NEED_FSCK should be set for fsck has a chance to
repair in case of scan_nat_page fail in run time.

Signed-off-by: Zhiguo Niu <[email protected]>
---
fs/f2fs/node.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index ee2e1dd..d9e6087 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2499,12 +2499,15 @@ static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi,
ret = PTR_ERR(page);
} else {
ret = scan_nat_page(sbi, page, nid);
+ if (ret && !mount) {
+ set_sbi_flag(sbi, SBI_NEED_FSCK);
+ f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
+ }
f2fs_put_page(page, 1);
}

if (ret) {
f2fs_up_read(&nm_i->nat_tree_lock);
- f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
return ret;
}
}
--
1.9.1


2023-10-16 07:38:04

by Chao Yu

[permalink] [raw]
Subject: Re: [PATCH] f2fs: fix error path of __f2fs_build_free_nids

On 2023/10/13 18:58, Zhiguo Niu wrote:
> SBI_NEED_FSCK should be set for fsck has a chance to
> repair in case of scan_nat_page fail in run time.
>
> Signed-off-by: Zhiguo Niu <[email protected]>

Hi Zhiguo,

Can you please check below update?

From 9a3459d2d62a12f8708d72aa7808a1def9f9d92f Mon Sep 17 00:00:00 2001
From: Zhiguo Niu <[email protected]>
Date: Fri, 13 Oct 2023 18:58:23 +0800
Subject: [PATCH] f2fs: fix error path of __f2fs_build_free_nids

If NAT is corrupted, let scan_nat_page() return EFSCORRUPTED, so that,
caller can set SBI_NEED_FSCK flag into checkpoint for later repair by
fsck.

Also, this patch introduces a new fscorrupted error flag, and in above
scenario, it will persist the error flag into superblock synchronously
to avoid it has no luck to trigger a checkpoint to record SBI_NEED_FSCK.

Signed-off-by: Zhiguo Niu <[email protected]>
Signed-off-by: Chao Yu <[email protected]>
---
fs/f2fs/node.c | 11 +++++++++--
include/linux/f2fs_fs.h | 1 +
2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index a2b2c6c7f66d..57d9dd3a43bc 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2389,7 +2389,7 @@ static int scan_nat_page(struct f2fs_sb_info *sbi,
blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);

if (blk_addr == NEW_ADDR)
- return -EINVAL;
+ return -EFSCORRUPTED;

if (blk_addr == NULL_ADDR) {
add_free_nid(sbi, start_nid, true, true);
@@ -2504,7 +2504,14 @@ static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi,

if (ret) {
f2fs_up_read(&nm_i->nat_tree_lock);
- f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
+
+ if (ret == -EFSCORRUPTED) {
+ f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
+ set_sbi_flag(sbi, SBI_NEED_FSCK);
+ f2fs_handle_error(sbi,
+ ERROR_INCONSISTENT_NAT);
+ }
+
return ret;
}
}
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
index 07ed69c2840d..039fe0ce8d83 100644
--- a/include/linux/f2fs_fs.h
+++ b/include/linux/f2fs_fs.h
@@ -104,6 +104,7 @@ enum f2fs_error {
ERROR_CORRUPTED_VERITY_XATTR,
ERROR_CORRUPTED_XATTR,
ERROR_INVALID_NODE_REFERENCE,
+ ERROR_INCONSISTENT_NAT,
ERROR_MAX,
};

--
2.40.1

2023-10-16 09:03:18

by Zhiguo Niu

[permalink] [raw]
Subject: Re: [PATCH] f2fs: fix error path of __f2fs_build_free_nids

Dear Chao,

On Mon, Oct 16, 2023 at 3:37 PM Chao Yu <[email protected]> wrote:
>
> On 2023/10/13 18:58, Zhiguo Niu wrote:
> > SBI_NEED_FSCK should be set for fsck has a chance to
> > repair in case of scan_nat_page fail in run time.
> >
> > Signed-off-by: Zhiguo Niu <[email protected]>
>
> Hi Zhiguo,
>
> Can you please check below update?
>
> From 9a3459d2d62a12f8708d72aa7808a1def9f9d92f Mon Sep 17 00:00:00 2001
> From: Zhiguo Niu <[email protected]>
> Date: Fri, 13 Oct 2023 18:58:23 +0800
> Subject: [PATCH] f2fs: fix error path of __f2fs_build_free_nids
>
> If NAT is corrupted, let scan_nat_page() return EFSCORRUPTED, so that,
> caller can set SBI_NEED_FSCK flag into checkpoint for later repair by
> fsck.
>
> Also, this patch introduces a new fscorrupted error flag, and in above
> scenario, it will persist the error flag into superblock synchronously
> to avoid it has no luck to trigger a checkpoint to record SBI_NEED_FSCK.
>
> Signed-off-by: Zhiguo Niu <[email protected]>
> Signed-off-by: Chao Yu <[email protected]>
> ---
> fs/f2fs/node.c | 11 +++++++++--
> include/linux/f2fs_fs.h | 1 +
> 2 files changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index a2b2c6c7f66d..57d9dd3a43bc 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -2389,7 +2389,7 @@ static int scan_nat_page(struct f2fs_sb_info *sbi,
> blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
>
> if (blk_addr == NEW_ADDR)
> - return -EINVAL;
> + return -EFSCORRUPTED;
>
> if (blk_addr == NULL_ADDR) {
> add_free_nid(sbi, start_nid, true, true);
> @@ -2504,7 +2504,14 @@ static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi,
>
> if (ret) {
> f2fs_up_read(&nm_i->nat_tree_lock);
> - f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
> +
> + if (ret == -EFSCORRUPTED) {
> + f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_handle_error(sbi,
> + ERROR_INCONSISTENT_NAT);
> + }
> +
> return ret;
> }
> }
> diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
> index 07ed69c2840d..039fe0ce8d83 100644
> --- a/include/linux/f2fs_fs.h
> +++ b/include/linux/f2fs_fs.h
> @@ -104,6 +104,7 @@ enum f2fs_error {
> ERROR_CORRUPTED_VERITY_XATTR,
> ERROR_CORRUPTED_XATTR,
> ERROR_INVALID_NODE_REFERENCE,
> + ERROR_INCONSISTENT_NAT,
> ERROR_MAX,
> };
>
> --
> 2.40.1

Thank you for your updates and these updates are more reasonable based
on the latest code.
In addition, I also modified the following code after I checked the
related flow of f2fs_handle_error.
ERROR_INCONSISTENT_FOOTER is reused here, any suggestions for this?
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index d9e6087..94f5c7f 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -1467,6 +1467,7 @@ static struct page *__get_node_page(struct
f2fs_sb_info *sbi, pgoff_t nid,
ofs_of_node(page), cpver_of_node(page),
next_blkaddr_of_node(page));
set_sbi_flag(sbi, SBI_NEED_FSCK);
+ f2fs_handle_error(sbi, ERROR_INCONSISTENT_FOOTER);
err = -EINVAL;
out_err:
ClearPageUptodate(page);

If you have no other suggestions, I will update the "PATCH V2"
Thanks!

2023-10-16 09:07:19

by Chao Yu

[permalink] [raw]
Subject: Re: [PATCH] f2fs: fix error path of __f2fs_build_free_nids

Zhiguo,

On 2023/10/16 17:02, Zhiguo Niu wrote:
> Dear Chao,
>
> On Mon, Oct 16, 2023 at 3:37 PM Chao Yu <[email protected]> wrote:
>>
>> On 2023/10/13 18:58, Zhiguo Niu wrote:
>>> SBI_NEED_FSCK should be set for fsck has a chance to
>>> repair in case of scan_nat_page fail in run time.
>>>
>>> Signed-off-by: Zhiguo Niu <[email protected]>
>>
>> Hi Zhiguo,
>>
>> Can you please check below update?
>>
>> From 9a3459d2d62a12f8708d72aa7808a1def9f9d92f Mon Sep 17 00:00:00 2001
>> From: Zhiguo Niu <[email protected]>
>> Date: Fri, 13 Oct 2023 18:58:23 +0800
>> Subject: [PATCH] f2fs: fix error path of __f2fs_build_free_nids
>>
>> If NAT is corrupted, let scan_nat_page() return EFSCORRUPTED, so that,
>> caller can set SBI_NEED_FSCK flag into checkpoint for later repair by
>> fsck.
>>
>> Also, this patch introduces a new fscorrupted error flag, and in above
>> scenario, it will persist the error flag into superblock synchronously
>> to avoid it has no luck to trigger a checkpoint to record SBI_NEED_FSCK.
>>
>> Signed-off-by: Zhiguo Niu <[email protected]>
>> Signed-off-by: Chao Yu <[email protected]>
>> ---
>> fs/f2fs/node.c | 11 +++++++++--
>> include/linux/f2fs_fs.h | 1 +
>> 2 files changed, 10 insertions(+), 2 deletions(-)
>>
>> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
>> index a2b2c6c7f66d..57d9dd3a43bc 100644
>> --- a/fs/f2fs/node.c
>> +++ b/fs/f2fs/node.c
>> @@ -2389,7 +2389,7 @@ static int scan_nat_page(struct f2fs_sb_info *sbi,
>> blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
>>
>> if (blk_addr == NEW_ADDR)
>> - return -EINVAL;
>> + return -EFSCORRUPTED;
>>
>> if (blk_addr == NULL_ADDR) {
>> add_free_nid(sbi, start_nid, true, true);
>> @@ -2504,7 +2504,14 @@ static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi,
>>
>> if (ret) {
>> f2fs_up_read(&nm_i->nat_tree_lock);
>> - f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
>> +
>> + if (ret == -EFSCORRUPTED) {
>> + f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
>> + set_sbi_flag(sbi, SBI_NEED_FSCK);
>> + f2fs_handle_error(sbi,
>> + ERROR_INCONSISTENT_NAT);
>> + }
>> +
>> return ret;
>> }
>> }
>> diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
>> index 07ed69c2840d..039fe0ce8d83 100644
>> --- a/include/linux/f2fs_fs.h
>> +++ b/include/linux/f2fs_fs.h
>> @@ -104,6 +104,7 @@ enum f2fs_error {
>> ERROR_CORRUPTED_VERITY_XATTR,
>> ERROR_CORRUPTED_XATTR,
>> ERROR_INVALID_NODE_REFERENCE,
>> + ERROR_INCONSISTENT_NAT,
>> ERROR_MAX,
>> };
>>
>> --
>> 2.40.1
>
> Thank you for your updates and these updates are more reasonable based
> on the latest code.
> In addition, I also modified the following code after I checked the
> related flow of f2fs_handle_error.
> ERROR_INCONSISTENT_FOOTER is reused here, any suggestions for this?
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index d9e6087..94f5c7f 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -1467,6 +1467,7 @@ static struct page *__get_node_page(struct
> f2fs_sb_info *sbi, pgoff_t nid,
> ofs_of_node(page), cpver_of_node(page),
> next_blkaddr_of_node(page));
> set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_handle_error(sbi, ERROR_INCONSISTENT_FOOTER);
> err = -EINVAL;

err = -EFSCORRUPTED;

> out_err:
> ClearPageUptodate(page);
>
> If you have no other suggestions, I will update the "PATCH V2"

How about changing above code in separated patch?

Thanks,

> Thanks!

2023-10-16 09:16:47

by Zhiguo Niu

[permalink] [raw]
Subject: Re: [PATCH] f2fs: fix error path of __f2fs_build_free_nids

Dear Chao,

On Mon, Oct 16, 2023 at 5:07 PM Chao Yu <[email protected]> wrote:
>
> Zhiguo,
>
> On 2023/10/16 17:02, Zhiguo Niu wrote:
> > Dear Chao,
> >
> > On Mon, Oct 16, 2023 at 3:37 PM Chao Yu <[email protected]> wrote:
> >>
> >> On 2023/10/13 18:58, Zhiguo Niu wrote:
> >>> SBI_NEED_FSCK should be set for fsck has a chance to
> >>> repair in case of scan_nat_page fail in run time.
> >>>
> >>> Signed-off-by: Zhiguo Niu <[email protected]>
> >>
> >> Hi Zhiguo,
> >>
> >> Can you please check below update?
> >>
> >> From 9a3459d2d62a12f8708d72aa7808a1def9f9d92f Mon Sep 17 00:00:00 2001
> >> From: Zhiguo Niu <[email protected]>
> >> Date: Fri, 13 Oct 2023 18:58:23 +0800
> >> Subject: [PATCH] f2fs: fix error path of __f2fs_build_free_nids
> >>
> >> If NAT is corrupted, let scan_nat_page() return EFSCORRUPTED, so that,
> >> caller can set SBI_NEED_FSCK flag into checkpoint for later repair by
> >> fsck.
> >>
> >> Also, this patch introduces a new fscorrupted error flag, and in above
> >> scenario, it will persist the error flag into superblock synchronously
> >> to avoid it has no luck to trigger a checkpoint to record SBI_NEED_FSCK.
> >>
> >> Signed-off-by: Zhiguo Niu <[email protected]>
> >> Signed-off-by: Chao Yu <[email protected]>
> >> ---
> >> fs/f2fs/node.c | 11 +++++++++--
> >> include/linux/f2fs_fs.h | 1 +
> >> 2 files changed, 10 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> >> index a2b2c6c7f66d..57d9dd3a43bc 100644
> >> --- a/fs/f2fs/node.c
> >> +++ b/fs/f2fs/node.c
> >> @@ -2389,7 +2389,7 @@ static int scan_nat_page(struct f2fs_sb_info *sbi,
> >> blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
> >>
> >> if (blk_addr == NEW_ADDR)
> >> - return -EINVAL;
> >> + return -EFSCORRUPTED;
> >>
> >> if (blk_addr == NULL_ADDR) {
> >> add_free_nid(sbi, start_nid, true, true);
> >> @@ -2504,7 +2504,14 @@ static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi,
> >>
> >> if (ret) {
> >> f2fs_up_read(&nm_i->nat_tree_lock);
> >> - f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
> >> +
> >> + if (ret == -EFSCORRUPTED) {
> >> + f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
> >> + set_sbi_flag(sbi, SBI_NEED_FSCK);
> >> + f2fs_handle_error(sbi,
> >> + ERROR_INCONSISTENT_NAT);
> >> + }
> >> +
> >> return ret;
> >> }
> >> }
> >> diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
> >> index 07ed69c2840d..039fe0ce8d83 100644
> >> --- a/include/linux/f2fs_fs.h
> >> +++ b/include/linux/f2fs_fs.h
> >> @@ -104,6 +104,7 @@ enum f2fs_error {
> >> ERROR_CORRUPTED_VERITY_XATTR,
> >> ERROR_CORRUPTED_XATTR,
> >> ERROR_INVALID_NODE_REFERENCE,
> >> + ERROR_INCONSISTENT_NAT,
> >> ERROR_MAX,
> >> };
> >>
> >> --
> >> 2.40.1
> >
> > Thank you for your updates and these updates are more reasonable based
> > on the latest code.
> > In addition, I also modified the following code after I checked the
> > related flow of f2fs_handle_error.
> > ERROR_INCONSISTENT_FOOTER is reused here, any suggestions for this?
> > diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> > index d9e6087..94f5c7f 100644
> > --- a/fs/f2fs/node.c
> > +++ b/fs/f2fs/node.c
> > @@ -1467,6 +1467,7 @@ static struct page *__get_node_page(struct
> > f2fs_sb_info *sbi, pgoff_t nid,
> > ofs_of_node(page), cpver_of_node(page),
> > next_blkaddr_of_node(page));
> > set_sbi_flag(sbi, SBI_NEED_FSCK);
> > + f2fs_handle_error(sbi, ERROR_INCONSISTENT_FOOTER);
> > err = -EINVAL;
>
> err = -EFSCORRUPTED;
>
> > out_err:
> > ClearPageUptodate(page);
> >
> > If you have no other suggestions, I will update the "PATCH V2"
>
> How about changing above code in separated patch?
OK, I will do this as your suggestions.
Thanks!
>
> Thanks,
>
> > Thanks!

2023-10-16 09:17:21

by Chao Yu

[permalink] [raw]
Subject: Re: [PATCH] f2fs: fix error path of __f2fs_build_free_nids

On 2023/10/16 17:02, Zhiguo Niu wrote:
> Dear Chao,
>
> On Mon, Oct 16, 2023 at 3:37 PM Chao Yu <[email protected]> wrote:
>>
>> On 2023/10/13 18:58, Zhiguo Niu wrote:
>>> SBI_NEED_FSCK should be set for fsck has a chance to
>>> repair in case of scan_nat_page fail in run time.
>>>
>>> Signed-off-by: Zhiguo Niu <[email protected]>
>>
>> Hi Zhiguo,
>>
>> Can you please check below update?
>>
>> From 9a3459d2d62a12f8708d72aa7808a1def9f9d92f Mon Sep 17 00:00:00 2001
>> From: Zhiguo Niu <[email protected]>
>> Date: Fri, 13 Oct 2023 18:58:23 +0800
>> Subject: [PATCH] f2fs: fix error path of __f2fs_build_free_nids
>>
>> If NAT is corrupted, let scan_nat_page() return EFSCORRUPTED, so that,
>> caller can set SBI_NEED_FSCK flag into checkpoint for later repair by
>> fsck.
>>
>> Also, this patch introduces a new fscorrupted error flag, and in above
>> scenario, it will persist the error flag into superblock synchronously
>> to avoid it has no luck to trigger a checkpoint to record SBI_NEED_FSCK.

Zhiguo,

If you have no more comments, I guess you can resend this one as v2.

Thanks,

>>
>> Signed-off-by: Zhiguo Niu <[email protected]>
>> Signed-off-by: Chao Yu <[email protected]>
>> ---
>> fs/f2fs/node.c | 11 +++++++++--
>> include/linux/f2fs_fs.h | 1 +
>> 2 files changed, 10 insertions(+), 2 deletions(-)
>>
>> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
>> index a2b2c6c7f66d..57d9dd3a43bc 100644
>> --- a/fs/f2fs/node.c
>> +++ b/fs/f2fs/node.c
>> @@ -2389,7 +2389,7 @@ static int scan_nat_page(struct f2fs_sb_info *sbi,
>> blk_addr = le32_to_cpu(nat_blk->entries[i].block_addr);
>>
>> if (blk_addr == NEW_ADDR)
>> - return -EINVAL;
>> + return -EFSCORRUPTED;
>>
>> if (blk_addr == NULL_ADDR) {
>> add_free_nid(sbi, start_nid, true, true);
>> @@ -2504,7 +2504,14 @@ static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi,
>>
>> if (ret) {
>> f2fs_up_read(&nm_i->nat_tree_lock);
>> - f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
>> +
>> + if (ret == -EFSCORRUPTED) {
>> + f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
>> + set_sbi_flag(sbi, SBI_NEED_FSCK);
>> + f2fs_handle_error(sbi,
>> + ERROR_INCONSISTENT_NAT);
>> + }
>> +
>> return ret;
>> }
>> }
>> diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h
>> index 07ed69c2840d..039fe0ce8d83 100644
>> --- a/include/linux/f2fs_fs.h
>> +++ b/include/linux/f2fs_fs.h
>> @@ -104,6 +104,7 @@ enum f2fs_error {
>> ERROR_CORRUPTED_VERITY_XATTR,
>> ERROR_CORRUPTED_XATTR,
>> ERROR_INVALID_NODE_REFERENCE,
>> + ERROR_INCONSISTENT_NAT,
>> ERROR_MAX,
>> };
>>
>> --
>> 2.40.1
>
> Thank you for your updates and these updates are more reasonable based
> on the latest code.
> In addition, I also modified the following code after I checked the
> related flow of f2fs_handle_error.
> ERROR_INCONSISTENT_FOOTER is reused here, any suggestions for this?
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index d9e6087..94f5c7f 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -1467,6 +1467,7 @@ static struct page *__get_node_page(struct
> f2fs_sb_info *sbi, pgoff_t nid,
> ofs_of_node(page), cpver_of_node(page),
> next_blkaddr_of_node(page));
> set_sbi_flag(sbi, SBI_NEED_FSCK);
> + f2fs_handle_error(sbi, ERROR_INCONSISTENT_FOOTER);
> err = -EINVAL;
> out_err:
> ClearPageUptodate(page);
>
> If you have no other suggestions, I will update the "PATCH V2"
> Thanks!