linux-api.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
To: Goldwyn Rodrigues <rgoldwyn-l3A5Bk7waGM@public.gmane.org>
Cc: linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	jack-IBi9RG/b67k@public.gmane.org,
	hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
	linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-btrfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org,
	avi-VrcmuVmyx1hWk0Htik3J/w@public.gmane.org,
	axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org,
	linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	willy-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
	tom.leiming-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
	Goldwyn Rodrigues <rgoldwyn-IBi9RG/b67k@public.gmane.org>
Subject: Re: [PATCH 1/8] Use RWF_* flags for AIO operations
Date: Tue, 18 Apr 2017 23:37:54 -0700	[thread overview]
Message-ID: <20170419063754.GA20053@infradead.org> (raw)
In-Reply-To: <20170414120257.8932-2-rgoldwyn-l3A5Bk7waGM@public.gmane.org>

On Fri, Apr 14, 2017 at 07:02:50AM -0500, Goldwyn Rodrigues wrote:
> From: Goldwyn Rodrigues <rgoldwyn-IBi9RG/b67k@public.gmane.org>
> 
> RWF_* flags is used for preadv2/pwritev2 calls. Port to use
> it for aio operations as well. For this, aio_rw_flags is
> introduced in struct iocb (using aio_reserved1) which will
> carry these flags.
> 
> This is a precursor to the nowait AIO calls.
> 
> Note, the only place RWF_HIPRI comes in effect is dio_await_one().
> All the rest of the locations, aio code return -EIOCBQUEUED before the
> checks for RWF_HIPRI.
> 
> Signed-off-by: Goldwyn Rodrigues <rgoldwyn-IBi9RG/b67k@public.gmane.org>
> ---
>  fs/aio.c                     | 10 +++++++++-
>  fs/read_write.c              |  7 +------
>  include/linux/fs.h           | 12 ++++++++++++
>  include/uapi/linux/aio_abi.h |  2 +-
>  4 files changed, 23 insertions(+), 8 deletions(-)
> 
> diff --git a/fs/aio.c b/fs/aio.c
> index f52d925ee259..b8a33f5beef5 100644
> --- a/fs/aio.c
> +++ b/fs/aio.c
> @@ -1541,11 +1541,17 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
>  	ssize_t ret;
>  
>  	/* enforce forwards compatibility on users */
> -	if (unlikely(iocb->aio_reserved1 || iocb->aio_reserved2)) {
> +	if (unlikely(iocb->aio_reserved2)) {
>  		pr_debug("EINVAL: reserve field set\n");
>  		return -EINVAL;
>  	}
>  
> +	if (unlikely(iocb->aio_rw_flags & ~(RWF_HIPRI | RWF_DSYNC | RWF_SYNC))) {
> +		pr_debug("EINVAL: aio_rw_flags set with incompatible flags\n");
> +		return -EINVAL;
> +	}
> +

> +	req->common.ki_flags |= iocb_rw_flags(iocb->aio_rw_flags);

The flag validity checking also needs to go into what's currently
iocb_rw_flags (which will need a new name and a return value).

  parent reply	other threads:[~2017-04-19  6:37 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-14 12:02 [PATCH 0/8 v6] No wait AIO Goldwyn Rodrigues
     [not found] ` <20170414120257.8932-1-rgoldwyn-l3A5Bk7waGM@public.gmane.org>
2017-04-14 12:02   ` [PATCH 1/8] Use RWF_* flags for AIO operations Goldwyn Rodrigues
     [not found]     ` <20170414120257.8932-2-rgoldwyn-l3A5Bk7waGM@public.gmane.org>
2017-04-19  6:37       ` Christoph Hellwig [this message]
2017-04-14 12:02 ` [PATCH 2/8] nowait aio: Introduce RWF_NOWAIT Goldwyn Rodrigues
2017-04-19  6:39   ` Christoph Hellwig
     [not found]     ` <20170419063930.GB20053-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2017-04-19 10:30       ` Goldwyn Rodrigues
     [not found]         ` <2d816e3e-3625-7ebd-8550-68a7cc9c1a2e-l3A5Bk7waGM@public.gmane.org>
2017-04-19 11:03           ` Jan Kara
2017-04-14 12:02 ` [PATCH 3/8] nowait aio: return if direct write will trigger writeback Goldwyn Rodrigues
2017-04-14 12:02 ` [PATCH 4/8] nowait-aio: Introduce IOMAP_NOWAIT Goldwyn Rodrigues
2017-04-19  6:39   ` Christoph Hellwig
     [not found]   ` <20170414120257.8932-5-rgoldwyn-l3A5Bk7waGM@public.gmane.org>
2017-04-19  7:12     ` Jan Kara
2017-04-14 12:02 ` [PATCH 5/8] nowait aio: return on congested block device Goldwyn Rodrigues
2017-04-19  6:45   ` Christoph Hellwig
2017-04-19 15:21     ` Goldwyn Rodrigues
2017-04-20 13:43       ` Jan Kara
2017-04-24 21:10     ` Goldwyn Rodrigues
2017-04-25  2:28       ` Jens Axboe
2017-04-14 12:02 ` [PATCH 6/8] nowait aio: ext4 Goldwyn Rodrigues
2017-04-14 12:02 ` [PATCH 7/8] nowait aio: xfs Goldwyn Rodrigues
2017-04-19  6:45   ` Christoph Hellwig
2017-04-14 12:02 ` [PATCH 8/8] nowait aio: btrfs Goldwyn Rodrigues
     [not found]   ` <20170414120257.8932-9-rgoldwyn-l3A5Bk7waGM@public.gmane.org>
2017-04-18 11:39     ` David Sterba
2017-05-09 12:22 [PATCH 0/8 v7] No wait AIO Goldwyn Rodrigues
2017-05-09 12:22 ` [PATCH 1/8] Use RWF_* flags for AIO operations Goldwyn Rodrigues
2017-05-11  7:40   ` Christoph Hellwig

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170419063754.GA20053@infradead.org \
    --to=hch-wegcikhe2lqwvfeawa7xhq@public.gmane.org \
    --cc=avi-VrcmuVmyx1hWk0Htik3J/w@public.gmane.org \
    --cc=axboe-tSWWG44O7X1aa/9Udqfwiw@public.gmane.org \
    --cc=jack-IBi9RG/b67k@public.gmane.org \
    --cc=linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-block-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-btrfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-ext4-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-fsdevel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-xfs-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=rgoldwyn-IBi9RG/b67k@public.gmane.org \
    --cc=rgoldwyn-l3A5Bk7waGM@public.gmane.org \
    --cc=sagi-NQWnxTmZq1alnMjI0IkVqw@public.gmane.org \
    --cc=tom.leiming-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
    --cc=willy-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org \
    --subject='Re: [PATCH 1/8] Use RWF_* flags for AIO operations' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).