From: Stefano Garzarella <sgarzare@redhat.com>
To: netdev@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org,
Dexuan Cui <decui@microsoft.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
"David S. Miller" <davem@davemloft.net>,
Jorgen Hansen <jhansen@vmware.com>
Subject: [PATCH net-next 3/6] vsock: add local transport support in the vsock core
Date: Tue, 19 Nov 2019 12:01:18 +0100 [thread overview]
Message-ID: <20191119110121.14480-4-sgarzare@redhat.com> (raw)
In-Reply-To: <20191119110121.14480-1-sgarzare@redhat.com>
This patch allows to register a transport able to handle
local communication (loopback).
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
include/net/af_vsock.h | 2 ++
net/vmw_vsock/af_vsock.c | 17 ++++++++++++++++-
2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/include/net/af_vsock.h b/include/net/af_vsock.h
index 4206dc6d813f..b1c717286993 100644
--- a/include/net/af_vsock.h
+++ b/include/net/af_vsock.h
@@ -98,6 +98,8 @@ struct vsock_transport_send_notify_data {
#define VSOCK_TRANSPORT_F_G2H 0x00000002
/* Transport provides DGRAM communication */
#define VSOCK_TRANSPORT_F_DGRAM 0x00000004
+/* Transport provides local (loopback) communication */
+#define VSOCK_TRANSPORT_F_LOCAL 0x00000008
struct vsock_transport {
struct module *module;
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index cc8659838bf2..c9e5bad59dc1 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -136,6 +136,8 @@ static const struct vsock_transport *transport_h2g;
static const struct vsock_transport *transport_g2h;
/* Transport used for DGRAM communication */
static const struct vsock_transport *transport_dgram;
+/* Transport used for local communication */
+static const struct vsock_transport *transport_local;
static DEFINE_MUTEX(vsock_register_mutex);
/**** UTILS ****/
@@ -2130,7 +2132,7 @@ EXPORT_SYMBOL_GPL(vsock_core_get_transport);
int vsock_core_register(const struct vsock_transport *t, int features)
{
- const struct vsock_transport *t_h2g, *t_g2h, *t_dgram;
+ const struct vsock_transport *t_h2g, *t_g2h, *t_dgram, *t_local;
int err = mutex_lock_interruptible(&vsock_register_mutex);
if (err)
@@ -2139,6 +2141,7 @@ int vsock_core_register(const struct vsock_transport *t, int features)
t_h2g = transport_h2g;
t_g2h = transport_g2h;
t_dgram = transport_dgram;
+ t_local = transport_local;
if (features & VSOCK_TRANSPORT_F_H2G) {
if (t_h2g) {
@@ -2164,9 +2167,18 @@ int vsock_core_register(const struct vsock_transport *t, int features)
t_dgram = t;
}
+ if (features & VSOCK_TRANSPORT_F_LOCAL) {
+ if (t_local) {
+ err = -EBUSY;
+ goto err_busy;
+ }
+ t_local = t;
+ }
+
transport_h2g = t_h2g;
transport_g2h = t_g2h;
transport_dgram = t_dgram;
+ transport_local = t_local;
err_busy:
mutex_unlock(&vsock_register_mutex);
@@ -2187,6 +2199,9 @@ void vsock_core_unregister(const struct vsock_transport *t)
if (transport_dgram == t)
transport_dgram = NULL;
+ if (transport_local == t)
+ transport_local = NULL;
+
mutex_unlock(&vsock_register_mutex);
}
EXPORT_SYMBOL_GPL(vsock_core_unregister);
--
2.21.0
next prev parent reply other threads:[~2019-11-19 11:01 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-19 11:01 [PATCH net-next 0/6] vsock: add local transport support Stefano Garzarella
2019-11-19 11:01 ` [PATCH net-next 1/6] vsock/virtio_transport_common: remove unused virtio header includes Stefano Garzarella
2019-11-19 11:01 ` [PATCH net-next 2/6] vsock: add VMADDR_CID_LOCAL definition Stefano Garzarella
2019-11-21 14:49 ` Jorgen Hansen
2019-11-19 11:01 ` Stefano Garzarella [this message]
2019-11-21 15:04 ` [PATCH net-next 3/6] vsock: add local transport support in the vsock core Jorgen Hansen
2019-11-21 15:21 ` Stefano Garzarella
2019-11-21 15:53 ` Jorgen Hansen
2019-11-21 16:12 ` Stefano Garzarella
2019-11-21 16:19 ` Jorgen Hansen
2019-11-19 11:01 ` [PATCH net-next 4/6] vsock: add vsock_loopback transport Stefano Garzarella
2019-11-20 1:15 ` David Miller
2019-11-20 9:00 ` Stefano Garzarella
2019-11-21 9:34 ` Stefan Hajnoczi
2019-11-21 9:59 ` Stefano Garzarella
2019-11-21 15:25 ` Stefano Garzarella
2019-11-22 9:25 ` Stefan Hajnoczi
2019-11-22 10:02 ` Stefano Garzarella
2019-11-19 11:01 ` [PATCH net-next 5/6] vsock: use local transport when it is loaded Stefano Garzarella
2019-11-21 9:46 ` Stefan Hajnoczi
2019-11-21 10:01 ` Stefano Garzarella
2019-11-19 11:01 ` [PATCH net-next 6/6] vsock/virtio: remove loopback handling Stefano Garzarella
2019-11-21 9:46 ` [PATCH net-next 0/6] vsock: add local transport support Stefan Hajnoczi
2019-11-21 10:05 ` Stefano Garzarella
2019-11-21 14:45 ` Jorgen Hansen
2019-11-21 15:13 ` Stefano Garzarella
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=20191119110121.14480-4-sgarzare@redhat.com \
--to=sgarzare@redhat.com \
--cc=davem@davemloft.net \
--cc=decui@microsoft.com \
--cc=jhansen@vmware.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=stefanha@redhat.com \
--cc=virtualization@lists.linux-foundation.org \
/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).