linux-kernel - [PATCH 4.19 278/425] vsock/vmci: log once the failed queue pair allocation

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Message-Id: <20210520092140.579576445@linuxfoundation.org>
Date:   Thu, 20 May 2021 11:20:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Stefano Garzarella <sgarzare@...hat.com>,
        Jorgen Hansen <jhansen@...are.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 278/425] vsock/vmci: log once the failed queue pair allocation

From: Stefano Garzarella <sgarzare@...hat.com>

[ Upstream commit e16edc99d658cd41c60a44cc14d170697aa3271f ]

VMCI feature is not supported in conjunction with the vSphere Fault
Tolerance (FT) feature.

VMware Tools can repeatedly try to create a vsock connection. If FT is
enabled the kernel logs is flooded with the following messages:

    qp_alloc_hypercall result = -20
    Could not attach to queue pair with -20

"qp_alloc_hypercall result = -20" was hidden by commit e8266c4c3307
("VMCI: Stop log spew when qp allocation isn't possible"), but "Could
not attach to queue pair with -20" is still there flooding the log.

Since the error message can be useful in some cases, print it only once.

Fixes: d021c344051a ("VSOCK: Introduce VM Sockets")
Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>
Reviewed-by: Jorgen Hansen <jhansen@...are.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/vmw_vsock/vmci_transport.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c
index c3d5ab01fba7..42ab3e2ac060 100644
--- a/net/vmw_vsock/vmci_transport.c
+++ b/net/vmw_vsock/vmci_transport.c
@@ -584,8 +584,7 @@ vmci_transport_queue_pair_alloc(struct vmci_qp **qpair,
 			       peer, flags, VMCI_NO_PRIVILEGE_FLAGS);
 out:
 	if (err < 0) {
-		pr_err("Could not attach to queue pair with %d\n",
-		       err);
+		pr_err_once("Could not attach to queue pair with %d\n", err);
 		err = vmci_transport_error_to_vsock_error(err);
 	}
 
-- 
2.30.2