linux-kernel - [PATCH] devlink: add devlink notification for recovery

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Message-Id: <1568832741-20850-1-git-send-email-sheetal.tigadoli@broadcom.com>
Date:   Thu, 19 Sep 2019 00:22:21 +0530
From:   Sheetal Tigadoli <sheetal.tigadoli@...adcom.com>
To:     Jiri Pirko <jiri@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>,
        Ray Jui <ray.jui@...adcom.com>,
        Vikram Prakash <vikram.prakash@...adcom.com>
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        Vikas Gupta <vikas.gupta@...adcom.com>,
        Sheetal Tigadoli <sheetal.tigadoli@...adcom.com>
Subject: [PATCH] devlink: add devlink notification for recovery

From: Vikas Gupta <vikas.gupta@...adcom.com>

Add a devlink notification for reporter recovery

Signed-off-by: Vikas Gupta <vikas.gupta@...adcom.com>
Signed-off-by: Sheetal Tigadoli <sheetal.tigadoli@...adcom.com>
---
 net/core/devlink.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/net/core/devlink.c b/net/core/devlink.c
index e48680e..42909fb 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4730,6 +4730,28 @@ struct devlink_health_reporter *
 }
 EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
 
+static void __devlink_recover_notify(struct devlink *devlink,
+				     enum devlink_command cmd)
+{
+	struct sk_buff *msg;
+	int err;
+
+	WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return;
+
+	err = devlink_nl_fill(msg, devlink, cmd, 0, 0, 0);
+	if (err) {
+		nlmsg_free(msg);
+		return;
+	}
+
+	genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink),
+				msg, 0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
 static int
 devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
 				void *priv_ctx)
@@ -4747,6 +4769,9 @@ struct devlink_health_reporter *
 	reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
 	reporter->last_recovery_ts = jiffies;
 
+	__devlink_recover_notify(reporter->devlink,
+				 DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+
 	return 0;
 }
 
-- 
1.9.1