From patchwork Thu Dec 30 13:23:18 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Schoenebeck X-Patchwork-Id: 12701456 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75C18C433F5 for ; Thu, 30 Dec 2021 14:13:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239865AbhL3OM7 (ORCPT ); Thu, 30 Dec 2021 09:12:59 -0500 Received: from lizzy.crudebyte.com ([91.194.90.13]:54907 "EHLO lizzy.crudebyte.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239876AbhL3OM4 (ORCPT ); Thu, 30 Dec 2021 09:12:56 -0500 X-Greylist: delayed 2530 seconds by postgrey-1.27 at vger.kernel.org; Thu, 30 Dec 2021 09:12:56 EST DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=crudebyte.com; s=lizzy; h=Cc:To:Subject:Date:From:References:In-Reply-To: Message-Id:Content-Type:Content-Transfer-Encoding:MIME-Version:Content-ID: Content-Description; bh=HRgmsvyQc5R1HqZKiatrCeJDIA/6CkbTdpYiY2zKJhY=; b=hTnCe o1Whg/tS14T1EiCLIom1oN1Ymow2h360wlmsCPKFdW1o/E5jptO/jc3ghECy5x4oQTjfcjE9V3rNi 0XAFV6+W5SrHqQ6aJQYfrKplD83GIyH4bYiuyYW+tjOuslK4OJ9ydyS6dCF/51Rb0L7qFvSU6wEaN 3LAjPKYsozzUVWObI3ORKU1/0FC2rLvt25DSnFm7pifvUqvG6/L0hynnnQas04uFC3s9IMPYR67h0 Cki9svDG1l1vps8GsTZj27pUZdMuIFL8QeQebWepy/AH2b//jwyskrQghftOFaBxUc3FC/0zjZ8sY 40+ogM7lMXi3lpZWsGjpSmHcM3U5g==; Message-Id: In-Reply-To: References: From: Christian Schoenebeck Date: Thu, 30 Dec 2021 14:23:18 +0100 Subject: [PATCH v4 05/12] net/9p: add trans_maxsize to struct p9_client To: v9fs-developer@lists.sourceforge.net Cc: netdev@vger.kernel.org, Dominique Martinet , Eric Van Hensbergen , Latchesar Ionkov , Greg Kurz , Vivek Goyal , Nikolay Kichukov Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org This new field 'trans_maxsize' optionally allows transport to update it to reflect the actual maximum msize supported by allocated transport channel. Signed-off-by: Christian Schoenebeck --- include/net/9p/client.h | 2 ++ net/9p/client.c | 12 ++++++++++-- 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/include/net/9p/client.h b/include/net/9p/client.h index ec1d1706f43c..f5718057fca4 100644 --- a/include/net/9p/client.h +++ b/include/net/9p/client.h @@ -87,6 +87,7 @@ struct p9_req_t { * struct p9_client - per client instance state * @lock: protect @fids and @reqs * @msize: maximum data size negotiated by protocol + * @trans_maxsize: actual maximum msize supported by transport channel * @proto_version: 9P protocol version to use * @trans_mod: module API instantiated with this client * @status: connection state @@ -101,6 +102,7 @@ struct p9_req_t { struct p9_client { spinlock_t lock; unsigned int msize; + unsigned int trans_maxsize; unsigned char proto_version; struct p9_trans_module *trans_mod; enum p9_trans_status status; diff --git a/net/9p/client.c b/net/9p/client.c index 8bba0d9cf975..20054addd81b 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -1031,6 +1031,14 @@ struct p9_client *p9_client_create(const char *dev_name, char *options) goto free_client; } + /* + * transport will get a chance to increase trans_maxsize (if + * necessary) and it may update trans_maxsize in create() function + * below accordingly to reflect the actual maximum size supported by + * the allocated transport channel + */ + clnt->trans_maxsize = clnt->trans_mod->maxsize; + p9_debug(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); @@ -1038,8 +1046,8 @@ struct p9_client *p9_client_create(const char *dev_name, char *options) if (err) goto put_trans; - if (clnt->msize > clnt->trans_mod->maxsize) { - clnt->msize = clnt->trans_mod->maxsize; + if (clnt->msize > clnt->trans_maxsize) { + clnt->msize = clnt->trans_maxsize; pr_info("Limiting 'msize' to %d as this is the maximum " "supported by transport %s\n", clnt->msize, clnt->trans_mod->name