netdev - [PATCH net-next 1/6] net: Fix fib notifer to return errno

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Message-Id: <20180328012200.15175-2-dsa@cumulusnetworks.com>
Date:   Tue, 27 Mar 2018 18:21:55 -0700
From:   David Ahern <dsa@...ulusnetworks.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, roopa@...ulusnetworks.com,
        shm@...ulusnetworks.com, jiri@...lanox.com, idosch@...lanox.com,
        jakub.kicinski@...ronome.com, andy.roulin@...il.com,
        David Ahern <dsa@...ulusnetworks.com>
Subject: [PATCH net-next 1/6] net: Fix fib notifer to return errno

Notifier handlers use notifier_from_errno to convert any potential error
to an encoded format. As a consequence the other side, call_fib_notifier{s}
in this case, needs to use notifier_to_errno to return the error from
the handler back to its caller.

Signed-off-by: David Ahern <dsa@...ulusnetworks.com>
---
 net/core/fib_notifier.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/net/core/fib_notifier.c b/net/core/fib_notifier.c
index 0c048bdeb016..b793b523aba3 100644
--- a/net/core/fib_notifier.c
+++ b/net/core/fib_notifier.c
@@ -13,16 +13,22 @@ int call_fib_notifier(struct notifier_block *nb, struct net *net,
 		      enum fib_event_type event_type,
 		      struct fib_notifier_info *info)
 {
+	int err;
+
 	info->net = net;
-	return nb->notifier_call(nb, event_type, info);
+	err = nb->notifier_call(nb, event_type, info);
+	return notifier_to_errno(err);
 }
 EXPORT_SYMBOL(call_fib_notifier);
 
 int call_fib_notifiers(struct net *net, enum fib_event_type event_type,
 		       struct fib_notifier_info *info)
 {
+	int err;
+
 	info->net = net;
-	return atomic_notifier_call_chain(&fib_chain, event_type, info);
+	err = atomic_notifier_call_chain(&fib_chain, event_type, info);
+	return notifier_to_errno(err);
 }
 EXPORT_SYMBOL(call_fib_notifiers);
 
-- 
2.11.0