From: Chao Yu <yuchao0@huawei.com>
To: Eric Biggers <ebiggers@kernel.org>
Cc: <linux-fscrypt@vger.kernel.org>, <linux-ext4@vger.kernel.org>,
<linux-f2fs-devel@lists.sourceforge.net>,
<linux-fsdevel@vger.kernel.org>, <linux-api@vger.kernel.org>,
<linux-integrity@vger.kernel.org>,
Jaegeuk Kim <jaegeuk@kernel.org>,
"Theodore Y . Ts'o" <tytso@mit.edu>,
Victor Hsieh <victorhsieh@google.com>,
Chandan Rajendra <chandan@linux.vnet.ibm.com>,
"Dave Chinner" <david@fromorbit.com>,
Christoph Hellwig <hch@lst.de>,
"Darrick J . Wong" <darrick.wong@oracle.com>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH v5 16/16] f2fs: add fs-verity support
Date: Wed, 26 Jun 2019 15:34:35 +0800 [thread overview]
Message-ID: <68c5a15f-f6a8-75e2-b485-0f1b51471995@huawei.com> (raw)
In-Reply-To: <20190625175225.GC81914@gmail.com>
Hi Eric,
On 2019/6/26 1:52, Eric Biggers wrote:
> Hi Chao, thanks for the review.
>
> On Tue, Jun 25, 2019 at 03:55:57PM +0800, Chao Yu wrote:
>> Hi Eric,
>>
>> On 2019/6/21 4:50, Eric Biggers wrote:
>>> +static int f2fs_begin_enable_verity(struct file *filp)
>>> +{
>>> + struct inode *inode = file_inode(filp);
>>> + int err;
>>> +
>>
>> I think we'd better add condition here (under inode lock) to disallow enabling
>> verity on atomic/volatile inode, as we may fail to write merkle tree data due to
>> atomic/volatile inode's special writeback method.
>>
>
> Yes, I'll add the following:
>
> if (f2fs_is_atomic_file(inode) || f2fs_is_volatile_file(inode))
> return -EOPNOTSUPP;
>
>>> + err = f2fs_convert_inline_inode(inode);
>>> + if (err)
>>> + return err;
>>> +
>>> + err = dquot_initialize(inode);
>>> + if (err)
>>> + return err;
>>
>> We can get rid of dquot_initialize() here, since f2fs_file_open() ->
>> dquot_file_open() should has initialized quota entry previously, right?
>
> We still need it because dquot_file_open() only calls dquot_initialize() if the
> file is being opened for writing. But here the file descriptor is readonly.
> I'll add a comment explaining this here and in the ext4 equivalent.
Ah, you're right.
f2fs_convert_inline_inode() may grab one more block during conversion, so we
need to call dquot_initialize() before inline conversion?
Thanks,
>
> - Eric
> .
>
next prev parent reply other threads:[~2019-06-26 7:34 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-20 20:50 [PATCH v5 00/16] fs-verity: read-only file-based authenticity protection Eric Biggers
2019-06-20 20:50 ` [PATCH v5 01/16] fs-verity: add a documentation file Eric Biggers
2019-06-22 22:10 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 02/16] fs-verity: add MAINTAINERS file entry Eric Biggers
2019-06-22 22:11 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 03/16] fs-verity: add UAPI header Eric Biggers
2019-06-22 22:11 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 04/16] fs: uapi: define verity bit for FS_IOC_GETFLAGS Eric Biggers
2019-06-22 22:11 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 05/16] fs-verity: add Kconfig and the helper functions for hashing Eric Biggers
2019-06-22 22:17 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 06/16] fs-verity: add inode and superblock fields Eric Biggers
2019-06-22 22:18 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 07/16] fs-verity: add the hook for file ->open() Eric Biggers
2019-06-22 22:28 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 08/16] fs-verity: add the hook for file ->setattr() Eric Biggers
2019-06-22 22:28 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 09/16] fs-verity: add data verification hooks for ->readpages() Eric Biggers
2019-06-22 22:32 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 10/16] fs-verity: implement FS_IOC_ENABLE_VERITY ioctl Eric Biggers
2019-06-22 22:43 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 11/16] fs-verity: implement FS_IOC_MEASURE_VERITY ioctl Eric Biggers
2019-06-22 22:43 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 12/16] fs-verity: add SHA-512 support Eric Biggers
2019-06-22 22:44 ` Jaegeuk Kim
2019-06-20 20:50 ` [PATCH v5 13/16] fs-verity: support builtin file signatures Eric Biggers
2019-06-20 20:50 ` [PATCH v5 14/16] ext4: add basic fs-verity support Eric Biggers
2019-06-20 23:59 ` Darrick J. Wong
2019-06-21 3:17 ` Eric Biggers
2019-06-20 20:50 ` [PATCH v5 15/16] ext4: add fs-verity read support Eric Biggers
2019-06-20 20:50 ` [PATCH v5 16/16] f2fs: add fs-verity support Eric Biggers
2019-06-22 23:12 ` Jaegeuk Kim
2019-06-25 7:55 ` Chao Yu
2019-06-25 17:52 ` Eric Biggers
2019-06-26 7:34 ` Chao Yu [this message]
2019-06-26 18:21 ` Eric Biggers
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