From: David Miller <davem@davemloft.net>
To: lucien.xin@gmail.com
Cc: netdev@vger.kernel.org, linux-sctp@vger.kernel.org,
marcelo.leitner@gmail.com, nhorman@tuxdriver.com,
mkubecek@suse.cz
Subject: Re: [PATCH net] sctp: fix the issue that flags are ignored when using kernel_connect
Date: Tue, 22 May 2018 13:40:14 -0400 (EDT) [thread overview]
Message-ID: <20180522.134014.1038689773683362410.davem@davemloft.net> (raw)
In-Reply-To: <4863916c3e574b0d860725466d7d4a2f445fbe5b.1526805550.git.lucien.xin@gmail.com>
From: Xin Long <lucien.xin@gmail.com>
Date: Sun, 20 May 2018 16:39:10 +0800
> Now sctp uses inet_dgram_connect as its proto_ops .connect, and the flags
> param can't be passed into its proto .connect where this flags is really
> needed.
>
> sctp works around it by getting flags from socket file in __sctp_connect.
> It works for connecting from userspace, as inherently the user sock has
> socket file and it passes f_flags as the flags param into the proto_ops
> .connect.
>
> However, the sock created by sock_create_kern doesn't have a socket file,
> and it passes the flags (like O_NONBLOCK) by using the flags param in
> kernel_connect, which calls proto_ops .connect later.
>
> So to fix it, this patch defines a new proto_ops .connect for sctp,
> sctp_inet_connect, which calls __sctp_connect() directly with this
> flags param. After this, the sctp's proto .connect can be removed.
>
> Note that sctp_inet_connect doesn't need to do some checks that are not
> needed for sctp, which makes thing better than with inet_dgram_connect.
>
> Suggested-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
> Signed-off-by: Xin Long <lucien.xin@gmail.com>
Applied, thank you.
I don't see a Fixes: tag, please give me some guidance me wrt. -stable.
next prev parent reply other threads:[~2018-05-22 17:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-20 8:39 [PATCH net] sctp: fix the issue that flags are ignored when using kernel_connect Xin Long
2018-05-21 11:46 ` Neil Horman
2018-05-21 15:52 ` Marcelo Ricardo Leitner
2018-05-22 12:38 ` Michal Kubecek
2018-05-22 17:40 ` David Miller [this message]
2018-05-23 6:55 ` Xin Long
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=20180522.134014.1038689773683362410.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=linux-sctp@vger.kernel.org \
--cc=lucien.xin@gmail.com \
--cc=marcelo.leitner@gmail.com \
--cc=mkubecek@suse.cz \
--cc=netdev@vger.kernel.org \
--cc=nhorman@tuxdriver.com \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).