netdev.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Christian Schoenebeck <linux_oss@crudebyte.com>
To: v9fs-developer@lists.sourceforge.net
Cc: netdev@vger.kernel.org,
	Dominique Martinet <asmadeus@codewreck.org>,
	Eric Van Hensbergen <ericvh@gmail.com>,
	Latchesar Ionkov <lucho@ionkov.net>, Greg Kurz <groug@kaod.org>,
	Vivek Goyal <vgoyal@redhat.com>
Subject: [PATCH v3 5/7] net/9p: add trans_maxsize to struct p9_client
Date: Wed, 22 Sep 2021 18:00:31 +0200	[thread overview]
Message-ID: <39113683f53916d6c9e5b24ffbd9e28b38df3800.1632327421.git.linux_oss@crudebyte.com> (raw)
In-Reply-To: <cover.1632327421.git.linux_oss@crudebyte.com>

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 <linux_oss@crudebyte.com>
---
 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 e1c308d8d288..e48c4cdf9be0 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -89,6 +89,7 @@ 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
@@ -103,6 +104,7 @@ 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 4f4fd2098a30..a75034fa249b 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1037,6 +1037,14 @@ 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);
 
@@ -1044,8 +1052,8 @@ 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
-- 
2.20.1


  parent reply	other threads:[~2021-09-22 17:30 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-22 16:00 [PATCH v3 0/7] net/9p: remove msize limit in virtio transport Christian Schoenebeck
2021-09-22 16:00 ` [PATCH v3 1/7] net/9p: show error message if user 'msize' cannot be satisfied Christian Schoenebeck
2021-09-22 16:00 ` [PATCH v3 2/7] 9p/trans_virtio: separate allocation of scatter gather list Christian Schoenebeck
2021-09-22 16:00 ` [PATCH v3 3/7] 9p/trans_virtio: turn amount of sg lists into runtime info Christian Schoenebeck
2021-09-22 16:00 ` [PATCH v3 4/7] 9p/trans_virtio: introduce struct virtqueue_sg Christian Schoenebeck
2021-09-22 16:00 ` Christian Schoenebeck [this message]
2021-09-22 16:00 ` [PATCH v3 6/7] 9p/trans_virtio: support larger msize values Christian Schoenebeck
2021-11-20 11:20   ` Nikolay Kichukov
2021-11-20 11:45     ` Dominique Martinet
2021-11-20 14:46       ` Christian Schoenebeck
2021-11-20 21:28         ` Nikolay Kichukov
2021-11-20 23:02         ` Dominique Martinet
2021-11-21 16:57           ` Christian Schoenebeck
2021-11-21 22:12             ` Dominique Martinet
2021-11-22 13:32               ` Christian Schoenebeck
2021-11-22 22:35                 ` Dominique Martinet
2021-11-24 12:22                   ` Christian Schoenebeck
2021-09-22 16:00 ` [PATCH v3 7/7] 9p/trans_virtio: resize sg lists to whatever is possible Christian Schoenebeck

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=39113683f53916d6c9e5b24ffbd9e28b38df3800.1632327421.git.linux_oss@crudebyte.com \
    --to=linux_oss@crudebyte.com \
    --cc=asmadeus@codewreck.org \
    --cc=ericvh@gmail.com \
    --cc=groug@kaod.org \
    --cc=lucho@ionkov.net \
    --cc=netdev@vger.kernel.org \
    --cc=v9fs-developer@lists.sourceforge.net \
    --cc=vgoyal@redhat.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).