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From: Adrian Moreno <amorenoz@redhat.com>
To: dev@dpdk.org
Cc: yinan.wang@intel.com, patrick.fu@intel.com, chenbo.xia@intel.com,
	zhihong.wang@intel.com, maxime.coquelin@redhat.com,
	Adrian Moreno <amorenoz@redhat.com>,
	stable@dpdk.org
Subject: [dpdk-dev] [PATCH v3 2/6] net/virtio-user: don't set/get_status until FEATURES_OK
Date: Mon, 26 Oct 2020 17:39:26 +0100
Message-ID: <20201026163930.94032-3-amorenoz@redhat.com> (raw)
In-Reply-To: <20201026163930.94032-1-amorenoz@redhat.com>

According to the virtio spec, ACK and DRIVER status bits should be set
before feature negotiation.

However, until the protocol features are negotiated, the driver does not
know if the device actually supports those vhost-user messages.
Therefore, until FEATURES_OK is set, the GET/SET_STATUS messages should
not be sent.

Fixes: 57912824615f ("net/virtio-user: support vhost status setting")
Cc: maxime.coquelin@redhat.com
Cc: stable@dpdk.org

Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Signed-off-by: Adrian Moreno <amorenoz@redhat.com>
---
 drivers/net/virtio/virtio_user/vhost_user.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/virtio/virtio_user/vhost_user.c b/drivers/net/virtio/virtio_user/vhost_user.c
index ef290c357..450d77e92 100644
--- a/drivers/net/virtio/virtio_user/vhost_user.c
+++ b/drivers/net/virtio/virtio_user/vhost_user.c
@@ -278,8 +278,9 @@ vhost_user_sock(struct virtio_user_dev *dev,
 
 	switch (req) {
 	case VHOST_USER_GET_STATUS:
-		if (!(dev->protocol_features &
-				(1ULL << VHOST_USER_PROTOCOL_F_STATUS)))
+		if (!(dev->status & VIRTIO_CONFIG_STATUS_FEATURES_OK) ||
+		    (!(dev->protocol_features &
+				(1ULL << VHOST_USER_PROTOCOL_F_STATUS))))
 			return 0;
 		/* Fallthrough */
 	case VHOST_USER_GET_FEATURES:
@@ -288,8 +289,9 @@ vhost_user_sock(struct virtio_user_dev *dev,
 		break;
 
 	case VHOST_USER_SET_STATUS:
-		if (!(dev->protocol_features &
-				(1ULL << VHOST_USER_PROTOCOL_F_STATUS)))
+		if (!(dev->status & VIRTIO_CONFIG_STATUS_FEATURES_OK) ||
+		    (!(dev->protocol_features &
+				(1ULL << VHOST_USER_PROTOCOL_F_STATUS))))
 			return 0;
 
 		if (has_reply_ack)
-- 
2.26.2


  parent reply	other threads:[~2020-10-26 16:42 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-26 16:39 [dpdk-dev] [PATCH v3 0/6] net/virtio-user: fix server mode Adrian Moreno
2020-10-26 16:39 ` [dpdk-dev] [PATCH v3 1/6] net/virtio-user: fix backend selection if stat fails Adrian Moreno
2020-10-26 16:39 ` Adrian Moreno [this message]
2020-10-26 16:39 ` [dpdk-dev] [PATCH v3 3/6] net/virtio-user: ignore result if STATUS is unsupported Adrian Moreno
2020-10-28  9:39   ` Maxime Coquelin
2020-10-26 16:39 ` [dpdk-dev] [PATCH v3 4/6] net/virtio-user: lock-protect status updates Adrian Moreno
2020-10-28 10:35   ` Maxime Coquelin
2020-10-26 16:39 ` [dpdk-dev] [PATCH v3 5/6] net/virtio-user: don't assume vhost status feature Adrian Moreno
2020-10-28 10:37   ` Maxime Coquelin
2020-10-26 16:39 ` [dpdk-dev] [PATCH v3 6/6] net/virtio-user: set status on socket reconnect Adrian Moreno
2020-10-28 11:01   ` Maxime Coquelin
2020-10-27  3:09 ` [dpdk-dev] [PATCH v3 0/6] net/virtio-user: fix server mode Jiang, YuX
2020-10-29  8:27 ` Maxime Coquelin

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