| 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
| ||
|
Message-ID: <1330663b-cb98-7f5b-c7a1-f9398076ba13@kernel.org>
Date: Sun, 22 Oct 2017 23:01:19 +0800
From: Chao Yu <chao@...nel.org>
To: Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <yuchao0@...wei.com>
Cc: linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: handle error case when adding xattr
entry
On 2017/10/20 2:54, Jaegeuk Kim wrote:
> On 10/18, Chao Yu wrote:
>> On 2017/10/18 0:41, Jaegeuk Kim wrote:
>>> On 10/17, Chao Yu wrote:
>>>> On 2017/10/17 7:06, Jaegeuk Kim wrote:
>>>>> This patch fixes recovering incomplete xattr entries remaining in inline xattr
>>>>> and xattr block, caused by any kind of errors.
>>>>>
>>>>> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
>>>>> ---
>>>>> fs/f2fs/xattr.c | 48 ++++++++++++++++++++++++++++--------------------
>>>>> 1 file changed, 28 insertions(+), 20 deletions(-)
>>>>>
>>>>> diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
>>>>> index e74a4d7f744a..5a9c5e6ad714 100644
>>>>> --- a/fs/f2fs/xattr.c
>>>>> +++ b/fs/f2fs/xattr.c
>>>>> @@ -389,10 +389,11 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
>>>>> {
>>>>> struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
>>>>> size_t inline_size = inline_xattr_size(inode);
>>>>> - void *xattr_addr;
>>>>> + struct page *in_page = NULL;
>>>>> + void *xattr_addr, *inline_addr;
>>>>> struct page *xpage;
>>>>> nid_t new_nid = 0;
>>>>> - int err;
>>>>> + int err = 0;
>>>>>
>>>>> if (hsize > inline_size && !F2FS_I(inode)->i_xattr_nid)
>>>>> if (!alloc_nid(sbi, &new_nid))
>>>>> @@ -400,30 +401,30 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
>>>>>
>>>>> /* write to inline xattr */
>>>>> if (inline_size) {
>>>>> - struct page *page = NULL;
>>>>> - void *inline_addr;
>>>>> -
>>>>> if (ipage) {
>>>>> inline_addr = inline_xattr_addr(inode, ipage);
>>>>> - f2fs_wait_on_page_writeback(ipage, NODE, true);
>>>>> - set_page_dirty(ipage);
>>>>> } else {
>>>>> - page = get_node_page(sbi, inode->i_ino);
>>>>> - if (IS_ERR(page)) {
>>>>> + in_page = get_node_page(sbi, inode->i_ino);
>>>>> + if (IS_ERR(in_page)) {
>>>>> alloc_nid_failed(sbi, new_nid);
>>>>> - return PTR_ERR(page);
>>>>> + return PTR_ERR(in_page);
>>>>> }
>>>>> - inline_addr = inline_xattr_addr(inode, page);
>>>>> - f2fs_wait_on_page_writeback(page, NODE, true);
>>>>> + inline_addr = inline_xattr_addr(inode, in_page);
>>>>> }
>>>>> - memcpy(inline_addr, txattr_addr, inline_size);
>>>>> - f2fs_put_page(page, 1);
>>>>>
>>>>> + f2fs_wait_on_page_writeback(ipage ? ipage : in_page,
>>>>> + NODE, true);
>>>>> /* no need to use xattr node block */
>>>>> if (hsize <= inline_size) {
>>>>> err = truncate_xattr_node(inode, ipage);
>>>>
>>>> truncate_xattr_node(inode, ipage ? ipage : in_page);
>>>
>>> No, that should be ipage.
>>
>> I just noted that dn.inode_page_locked in truncate_xattr_node will be set wrong,
>> but, anyway, it looks that won't be problem because we didn't use inode_page_locked
>> later.
>>
>> There is no more users of ipage in truncate_xattr_node, so no matter we passing,
>> there will be safe for us, right?
>
> Oh, yes, like this?
Yup, ;)
Thanks,
>
> From e5ae89e3c20c1c6a12cee27f6265427d99412dc8 Mon Sep 17 00:00:00 2001
> From: Jaegeuk Kim <jaegeuk@...nel.org>
> Date: Thu, 19 Oct 2017 11:48:57 -0700
> Subject: [PATCH] f2fs: remove obsolete pointer for truncate_xattr_node
>
> This patch removes obosolete parameter for truncate_xattr_node.
>
> Suggested-by: Chao Yu <yuchao0@...wei.com>
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
> fs/f2fs/f2fs.h | 2 +-
> fs/f2fs/node.c | 10 ++++------
> fs/f2fs/xattr.c | 2 +-
> 3 files changed, 6 insertions(+), 8 deletions(-)
>
> diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
> index 6301ccca8888..2a97cc5e3cd8 100644
> --- a/fs/f2fs/f2fs.h
> +++ b/fs/f2fs/f2fs.h
> @@ -2523,7 +2523,7 @@ void get_node_info(struct f2fs_sb_info *sbi, nid_t nid, struct node_info *ni);
> pgoff_t get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs);
> int get_dnode_of_data(struct dnode_of_data *dn, pgoff_t index, int mode);
> int truncate_inode_blocks(struct inode *inode, pgoff_t from);
> -int truncate_xattr_node(struct inode *inode, struct page *page);
> +int truncate_xattr_node(struct inode *inode);
> int wait_on_node_pages_writeback(struct f2fs_sb_info *sbi, nid_t ino);
> int remove_inode_page(struct inode *inode);
> struct page *new_inode_page(struct inode *inode);
> diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
> index ac629d6258ca..f44d83705245 100644
> --- a/fs/f2fs/node.c
> +++ b/fs/f2fs/node.c
> @@ -962,7 +962,8 @@ int truncate_inode_blocks(struct inode *inode, pgoff_t from)
> return err > 0 ? 0 : err;
> }
>
> -int truncate_xattr_node(struct inode *inode, struct page *page)
> +/* caller must lock inode page */
> +int truncate_xattr_node(struct inode *inode)
> {
> struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
> nid_t nid = F2FS_I(inode)->i_xattr_nid;
> @@ -978,10 +979,7 @@ int truncate_xattr_node(struct inode *inode, struct page *page)
>
> f2fs_i_xnid_write(inode, 0);
>
> - set_new_dnode(&dn, inode, page, npage, nid);
> -
> - if (page)
> - dn.inode_page_locked = true;
> + set_new_dnode(&dn, inode, NULL, npage, nid);
> truncate_node(&dn);
> return 0;
> }
> @@ -1000,7 +998,7 @@ int remove_inode_page(struct inode *inode)
> if (err)
> return err;
>
> - err = truncate_xattr_node(inode, dn.inode_page);
> + err = truncate_xattr_node(inode);
> if (err) {
> f2fs_put_dnode(&dn);
> return err;
> diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
> index 5a9c5e6ad714..147b481c6902 100644
> --- a/fs/f2fs/xattr.c
> +++ b/fs/f2fs/xattr.c
> @@ -416,7 +416,7 @@ static inline int write_all_xattrs(struct inode *inode, __u32 hsize,
> NODE, true);
> /* no need to use xattr node block */
> if (hsize <= inline_size) {
> - err = truncate_xattr_node(inode, ipage);
> + err = truncate_xattr_node(inode);
> alloc_nid_failed(sbi, new_nid);
> if (err) {
> f2fs_put_page(in_page, 1);
>
Powered by blists - more mailing lists