DPDK patches and discussions
 help / color / mirror / Atom feed
From: Ferruh Yigit <ferruh.yigit@intel.com>
To: dev@dpdk.org
Cc: Elad Nachman <eladv6@gmail.com>,
	Stephen Hemminger <stephen@networkplumber.org>
Subject: [dpdk-dev] [PATCH v5 1/3] kni: refactor user request processing
Date: Mon, 29 Mar 2021 15:36:53 +0100	[thread overview]
Message-ID: <20210329143655.521750-1-ferruh.yigit@intel.com> (raw)
In-Reply-To: <20201126144613.4986-1-eladv6@gmail.com>

From: Elad Nachman <eladv6@gmail.com>

Refactor the parameter kni_net_process_request() gets, this is
preparation for addressing a user request processing deadlock problem.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Elad Nachman <eladv6@gmail.com>
---
 kernel/linux/kni/kni_net.c | 25 +++++++++----------------
 1 file changed, 9 insertions(+), 16 deletions(-)

diff --git a/kernel/linux/kni/kni_net.c b/kernel/linux/kni/kni_net.c
index 4b752083da28..b830054c7491 100644
--- a/kernel/linux/kni/kni_net.c
+++ b/kernel/linux/kni/kni_net.c
@@ -17,6 +17,7 @@
 #include <linux/skbuff.h>
 #include <linux/kthread.h>
 #include <linux/delay.h>
+#include <linux/rtnetlink.h>
 
 #include <rte_kni_common.h>
 #include <kni_fifo.h>
@@ -102,17 +103,15 @@ get_data_kva(struct kni_dev *kni, void *pkt_kva)
  * It can be called to process the request.
  */
 static int
-kni_net_process_request(struct kni_dev *kni, struct rte_kni_request *req)
+kni_net_process_request(struct net_device *dev, struct rte_kni_request *req)
 {
+	struct kni_dev *kni = netdev_priv(dev);
 	int ret = -1;
 	void *resp_va;
 	uint32_t num;
 	int ret_val;
 
-	if (!kni || !req) {
-		pr_err("No kni instance or request\n");
-		return -EINVAL;
-	}
+	ASSERT_RTNL();
 
 	mutex_lock(&kni->sync_lock);
 
@@ -155,7 +154,6 @@ kni_net_open(struct net_device *dev)
 {
 	int ret;
 	struct rte_kni_request req;
-	struct kni_dev *kni = netdev_priv(dev);
 
 	netif_start_queue(dev);
 	if (kni_dflt_carrier == 1)
@@ -168,7 +166,7 @@ kni_net_open(struct net_device *dev)
 
 	/* Setting if_up to non-zero means up */
 	req.if_up = 1;
-	ret = kni_net_process_request(kni, &req);
+	ret = kni_net_process_request(dev, &req);
 
 	return (ret == 0) ? req.result : ret;
 }
@@ -178,7 +176,6 @@ kni_net_release(struct net_device *dev)
 {
 	int ret;
 	struct rte_kni_request req;
-	struct kni_dev *kni = netdev_priv(dev);
 
 	netif_stop_queue(dev); /* can't transmit any more */
 	netif_carrier_off(dev);
@@ -188,7 +185,7 @@ kni_net_release(struct net_device *dev)
 
 	/* Setting if_up to 0 means down */
 	req.if_up = 0;
-	ret = kni_net_process_request(kni, &req);
+	ret = kni_net_process_request(dev, &req);
 
 	return (ret == 0) ? req.result : ret;
 }
@@ -643,14 +640,13 @@ kni_net_change_mtu(struct net_device *dev, int new_mtu)
 {
 	int ret;
 	struct rte_kni_request req;
-	struct kni_dev *kni = netdev_priv(dev);
 
 	pr_debug("kni_net_change_mtu new mtu %d to be set\n", new_mtu);
 
 	memset(&req, 0, sizeof(req));
 	req.req_id = RTE_KNI_REQ_CHANGE_MTU;
 	req.new_mtu = new_mtu;
-	ret = kni_net_process_request(kni, &req);
+	ret = kni_net_process_request(dev, &req);
 	if (ret == 0 && req.result == 0)
 		dev->mtu = new_mtu;
 
@@ -661,7 +657,6 @@ static void
 kni_net_change_rx_flags(struct net_device *netdev, int flags)
 {
 	struct rte_kni_request req;
-	struct kni_dev *kni = netdev_priv(netdev);
 
 	memset(&req, 0, sizeof(req));
 
@@ -683,7 +678,7 @@ kni_net_change_rx_flags(struct net_device *netdev, int flags)
 			req.promiscusity = 0;
 	}
 
-	kni_net_process_request(kni, &req);
+	kni_net_process_request(netdev, &req);
 }
 
 /*
@@ -742,7 +737,6 @@ kni_net_set_mac(struct net_device *netdev, void *p)
 {
 	int ret;
 	struct rte_kni_request req;
-	struct kni_dev *kni;
 	struct sockaddr *addr = p;
 
 	memset(&req, 0, sizeof(req));
@@ -754,8 +748,7 @@ kni_net_set_mac(struct net_device *netdev, void *p)
 	memcpy(req.mac_addr, addr->sa_data, netdev->addr_len);
 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 
-	kni = netdev_priv(netdev);
-	ret = kni_net_process_request(kni, &req);
+	ret = kni_net_process_request(netdev, &req);
 
 	return (ret == 0 ? req.result : ret);
 }
-- 
2.30.2


  parent reply	other threads:[~2021-03-29 14:37 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-26 14:46 [dpdk-dev] [PATCH] kni: fix rtnl deadlocks and race conditions Elad Nachman
2021-02-19 18:41 ` Ferruh Yigit
2021-02-21  8:03   ` Elad Nachman
2021-02-22 15:58     ` Ferruh Yigit
2021-02-23 12:05 ` [dpdk-dev] [PATCH V2] kni: fix rtnl deadlocks and race conditions v2 Elad Nachman
2021-02-23 12:53   ` Ferruh Yigit
2021-02-23 13:44 ` [dpdk-dev] [PATCH 1/2] kni: fix rtnl deadlocks and race conditions v3 Elad Nachman
2021-02-23 13:45 ` [dpdk-dev] [PATCH 2/2] " Elad Nachman
2021-02-24 12:49   ` Igor Ryzhov
2021-02-24 13:33     ` Elad Nachman
2021-02-24 14:04       ` Igor Ryzhov
2021-02-24 14:06         ` Elad Nachman
2021-02-24 14:41           ` Igor Ryzhov
2021-02-24 14:56             ` Elad Nachman
2021-02-24 15:18               ` Igor Ryzhov
     [not found]                 ` <CACXF7qkhkzFc-=v=iiBzh2V7rLjk1U34VUfPbNrnYJND_0TKHQ@mail.gmail.com>
2021-02-24 16:31                   ` Igor Ryzhov
2021-02-24 15:54     ` Stephen Hemminger
2021-02-25 14:32 ` [dpdk-dev] [PATCH 1/2] kni: fix kernel deadlock when using mlx devices Elad Nachman
2021-02-25 14:32   ` [dpdk-dev] [PATCH 2/2] kni: fix rtnl deadlocks and race conditions v4 Elad Nachman
2021-02-25 21:01     ` Igor Ryzhov
2021-02-26 15:48       ` Stephen Hemminger
2021-02-26 17:43         ` Elad Nachman
2021-03-01  8:10           ` Igor Ryzhov
2021-03-01 16:38             ` Stephen Hemminger
2021-03-15 16:58               ` Ferruh Yigit
2021-03-01 20:27             ` Dan Gora
2021-03-01 21:26               ` Dan Gora
2021-03-02 16:44                 ` Elad Nachman
2021-03-15 17:17     ` Ferruh Yigit
2021-03-16 18:35       ` Elad Nachman
2021-03-16 18:42         ` Ferruh Yigit
2021-03-15 17:17   ` [dpdk-dev] [PATCH 1/2] kni: fix kernel deadlock when using mlx devices Ferruh Yigit
2021-03-29 14:36 ` Ferruh Yigit [this message]
2021-03-29 14:36   ` [dpdk-dev] [PATCH v5 2/3] kni: support async user request Ferruh Yigit
2021-03-29 14:36   ` [dpdk-dev] [PATCH v5 3/3] kni: fix kernel deadlock when using mlx devices Ferruh Yigit
2021-04-09 14:56     ` [dpdk-dev] [dpdk-stable] " Ferruh Yigit
2021-04-12 14:35       ` Elad Nachman
2021-04-20 23:07         ` Thomas Monjalon
2021-04-23  8:41           ` Igor Ryzhov
2021-04-23  8:59             ` Ferruh Yigit
2021-04-23 12:43               ` Igor Ryzhov
2021-04-23 12:58                 ` Igor Ryzhov

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=20210329143655.521750-1-ferruh.yigit@intel.com \
    --to=ferruh.yigit@intel.com \
    --cc=dev@dpdk.org \
    --cc=eladv6@gmail.com \
    --cc=stephen@networkplumber.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).