netdev - [net-next 5/5] i40e: (ptp) warn when PF_ID does not match in PRTTSYN

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1405546534-21025-6-git-send-email-jeffrey.t.kirsher@intel.com>
Date:	Wed, 16 Jul 2014 14:35:34 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	davem@...emloft.net
Cc:	Jacob Keller <jacob.e.keller@...el.com>, netdev@...r.kernel.org,
	nhorman@...hat.com, sassmann@...hat.com,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [net-next 5/5] i40e: (ptp) warn when PF_ID does not match in PRTTSYN_CTL0

From: Jacob Keller <jacob.e.keller@...el.com>

Display a verbose warning message when the incorrect PF attempts to
control timestamping for a port to which it was not assigned. This
shouldn't display except in the case of multiple PFs per port. The
primary intent of this message is to help debugging the reason why the
SIOCSHWTSTAMP ioctl has failed, and to help narrow the cause of the
issue.

Change-ID: Ic98798e0c844d98389d4c20e7160ba256f2bc7e8
Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
Tested-by: Jim Young <jamesx.m.young@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
---
 drivers/net/ethernet/intel/i40e/i40e_ptp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_ptp.c b/drivers/net/ethernet/intel/i40e/i40e_ptp.c
index 582704a..bb7fe98b 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_ptp.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_ptp.c
@@ -447,8 +447,12 @@ static int i40e_ptp_set_timestamp_mode(struct i40e_pf *pf,
 	/* Confirm that 1588 is supported on this PF. */
 	pf_id = (rd32(hw, I40E_PRTTSYN_CTL0) & I40E_PRTTSYN_CTL0_PF_ID_MASK) >>
 		I40E_PRTTSYN_CTL0_PF_ID_SHIFT;
-	if (hw->pf_id != pf_id)
-		return -EINVAL;
+	if (hw->pf_id != pf_id) {
+		dev_err(&pf->pdev->dev,
+			"PF %d attempted to control timestamp mode on port %d, which is owned by PF %d\n",
+			hw->pf_id, hw->port, pf_id);
+		return -EPERM;
+	}
 
 	switch (config->tx_type) {
 	case HWTSTAMP_TX_OFF:
-- 
1.9.3

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html