From: Jan Kara via Ocfs2-devel <ocfs2-devel@oss.oracle.com>
To: Zhang Yi <yi.zhang@huawei.com>
Cc: axboe@kernel.dk, almaz.alexandrovich@paragon-software.com,
ntfs3@lists.linux.dev, jack@suse.cz, agruenba@redhat.com,
hch@infradead.org, chengzhihao1@huawei.com,
linux-kernel@vger.kernel.org, reiserfs-devel@vger.kernel.org,
cluster-devel@redhat.com, rpeterso@redhat.com,
viro@zeniv.linux.org.uk, yukuai3@huawei.com,
linux-fsdevel@vger.kernel.org, tytso@mit.edu,
linux-ext4@vger.kernel.org, dushistov@mail.ru,
ocfs2-devel@oss.oracle.com
Subject: Re: [Ocfs2-devel] [PATCH 07/14] ntfs3: replace ll_rw_block()
Date: Wed, 31 Aug 2022 12:59:13 +0200 [thread overview]
Message-ID: <20220831105913.ges3eatp5buz3bkh@quack3> (raw)
In-Reply-To: <20220831072111.3569680-8-yi.zhang@huawei.com>
On Wed 31-08-22 15:21:04, Zhang Yi wrote:
> ll_rw_block() is not safe for the sync read path because it cannot
> guarantee that submitting read IO if the buffer has been locked. We
> could get false positive EIO after wait_on_buffer() if the buffer has
> been locked by others. So stop using ll_rw_block() in
> ntfs_get_block_vbo().
>
> Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Looks good to me. Feel free to add:
Reviewed-by: Jan Kara <jack@suse.cz>
Honza
> ---
> fs/ntfs3/inode.c | 7 ++-----
> 1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
> index 51363d4e8636..bbe7d4ea1750 100644
> --- a/fs/ntfs3/inode.c
> +++ b/fs/ntfs3/inode.c
> @@ -630,12 +630,9 @@ static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo,
> bh->b_size = block_size;
> off = vbo & (PAGE_SIZE - 1);
> set_bh_page(bh, page, off);
> - ll_rw_block(REQ_OP_READ, 1, &bh);
> - wait_on_buffer(bh);
> - if (!buffer_uptodate(bh)) {
> - err = -EIO;
> + err = bh_read(bh, 0);
> + if (err)
> goto out;
> - }
> zero_user_segment(page, off + voff, off + block_size);
> }
> }
> --
> 2.31.1
>
--
Jan Kara <jack@suse.com>
SUSE Labs, CR
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next prev parent reply other threads:[~2022-08-31 10:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220831072111.3569680-1-yi.zhang@huawei.com>
[not found] ` <20220831072111.3569680-2-yi.zhang@huawei.com>
2022-08-31 10:39 ` [Ocfs2-devel] [PATCH 01/14] fs/buffer: remove __breadahead_gfp() Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-4-yi.zhang@huawei.com>
2022-08-31 10:51 ` [Ocfs2-devel] [PATCH 03/14] fs/buffer: replace ll_rw_block() Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-5-yi.zhang@huawei.com>
2022-08-31 10:52 ` [Ocfs2-devel] [PATCH 04/14] gfs2: " Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-6-yi.zhang@huawei.com>
2022-08-31 10:53 ` [Ocfs2-devel] [PATCH 05/14] isofs: " Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-7-yi.zhang@huawei.com>
2022-08-31 10:58 ` [Ocfs2-devel] [PATCH 06/14] jbd2: " Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-8-yi.zhang@huawei.com>
2022-08-31 10:59 ` Jan Kara via Ocfs2-devel [this message]
[not found] ` <20220831072111.3569680-10-yi.zhang@huawei.com>
2022-08-31 11:04 ` [Ocfs2-devel] [PATCH 09/14] reiserfs: " Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-11-yi.zhang@huawei.com>
2022-08-31 11:05 ` [Ocfs2-devel] [PATCH 10/14] udf: " Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-12-yi.zhang@huawei.com>
2022-08-31 11:06 ` [Ocfs2-devel] [PATCH 11/14] ufs: " Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-13-yi.zhang@huawei.com>
2022-08-31 11:06 ` [Ocfs2-devel] [PATCH 12/14] fs/buffer: remove ll_rw_block() helper Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-14-yi.zhang@huawei.com>
2022-08-31 11:15 ` [Ocfs2-devel] [PATCH 13/14] ext2: replace bh_submit_read() helper with bh_read_locked() Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-15-yi.zhang@huawei.com>
2022-08-31 11:16 ` [Ocfs2-devel] [PATCH 14/14] fs/buffer: remove bh_submit_read() helper Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-3-yi.zhang@huawei.com>
2022-08-31 11:30 ` [Ocfs2-devel] [PATCH 02/14] fs/buffer: add some new buffer read helpers Jan Kara via Ocfs2-devel
[not found] ` <20220831072111.3569680-9-yi.zhang@huawei.com>
2022-08-31 11:31 ` [Ocfs2-devel] [PATCH 08/14] ocfs2: replace ll_rw_block() Jan Kara via Ocfs2-devel
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