From: Matthew Bobrowski <mbobrowski@mbobrowski.org>
To: Ritesh Harjani <riteshh@linux.ibm.com>
Cc: tytso@mit.edu, jack@suse.cz, adilger.kernel@dilger.ca,
linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org,
david@fromorbit.com, hch@infradead.org, darrick.wong@oracle.com
Subject: Re: [PATCH v2 5/6] ext4: introduce direct IO write path using iomap infrastructure
Date: Tue, 10 Sep 2019 20:31:47 +1000 [thread overview]
Message-ID: <20190910103147.GA10579@bobrowski> (raw)
In-Reply-To: <20190909092617.07ECB42041@d06av24.portsmouth.uk.ibm.com>
On Mon, Sep 09, 2019 at 02:56:15PM +0530, Ritesh Harjani wrote:
> On 9/9/19 4:49 AM, Matthew Bobrowski wrote:
> > +/*
> > + * For a write that extends the inode size, ext4_dio_write_iter() will
> > + * wait for the write to complete. Consequently, operations performed
> > + * within this function are still covered by the inode_lock().
> > + */
> Maybe add a comment that on success this returns 0.
OK, can do.
> > +static int ext4_dio_write_end_io(struct kiocb *iocb, ssize_t size, int error,
> > + unsigned int flags)
> > +{
> > + int ret = 0;
> No need to initialize ret.
>
>
> > + loff_t offset = iocb->ki_pos;
> > + struct inode *inode = file_inode(iocb->ki_filp);
> > +
> > + if (error) {
> > + ret = ext4_handle_failed_inode_extension(inode, offset + size);
> > + return ret ? ret : error;
> > + }
> > +
> > + if (flags & IOMAP_DIO_UNWRITTEN) {
> > + ret = ext4_convert_unwritten_extents(NULL, inode,
> > + offset, size);
> > + if (ret)
> > + return ret;
> > + }
> > +
> > + if (offset + size > i_size_read(inode)) {
> > + ret = ext4_handle_inode_extension(inode, offset, size, 0);
> > + if (ret)
> > + return ret;
> > + }
> > + return ret;
> Directly return 0, since if it falls here it mans it is a success case.
> You are anyway returning error from above error paths.
OK, sure.
--<M>--
next prev parent reply other threads:[~2019-09-10 10:31 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-08 23:18 [PATCH v2 0/6] ext4: port direct IO to iomap infrastructure Matthew Bobrowski
2019-09-08 23:18 ` [PATCH v2 1/6] ext4: introduce direct IO read path using " Matthew Bobrowski
2019-09-09 7:48 ` Ritesh Harjani
2019-09-08 23:19 ` [PATCH v2 2/6] ext4: move inode extension/truncate code out from ext4_iomap_end() Matthew Bobrowski
2019-09-09 8:17 ` Ritesh Harjani
2019-09-10 10:26 ` Matthew Bobrowski
2019-09-10 11:16 ` Ritesh Harjani
2019-09-08 23:19 ` [PATCH v2 3/6] iomap: modify ->end_io() calling convention Matthew Bobrowski
2019-09-08 23:32 ` Matthew Bobrowski
2019-09-08 23:19 ` [PATCH v2 4/6] ext4: reorder map.m_flags checks in ext4_iomap_begin() Matthew Bobrowski
2019-09-09 8:30 ` Ritesh Harjani
2019-09-08 23:19 ` [PATCH v2 5/6] ext4: introduce direct IO write path using iomap infrastructure Matthew Bobrowski
2019-09-09 9:20 ` Ritesh Harjani
2019-09-09 9:26 ` Ritesh Harjani
2019-09-09 14:32 ` Ritesh Harjani
2019-09-10 11:20 ` Matthew Bobrowski
2019-09-10 10:31 ` Matthew Bobrowski [this message]
2019-09-11 8:08 ` Ritesh Harjani
2019-09-11 12:39 ` Matthew Bobrowski
2019-09-08 23:20 ` [PATCH v2 6/6] ext4: cleanup legacy buffer_head direct IO code Matthew Bobrowski
2019-09-09 9:36 ` Ritesh Harjani
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