---

yaml --- r: 173611 b: refs/heads/master c: 7221d7e h: refs/heads/master i: 173609: f8acaf0 173607: 15109eb v: v3
git-mirror · Dec 4, 2009 · 9b66a21 · 9b66a21
1 parent bb874e1
commit 9b66a21
Show file tree

Hide file tree

Showing 3 changed files with 15 additions and 3 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8eca355fa8af660557fbdd5506bde1392eee9bfe
+refs/heads/master: 7221d7e59d1c675828b6de50b757cd8282011a5d
diff --git a/trunk/drivers/scsi/fcoe/fcoe.c b/trunk/drivers/scsi/fcoe/fcoe.c
@@ -439,8 +439,12 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	 * user-configured limit.  If the MFS is too low, fcoe_link_ok()
 	 * will return 0, so do this first.
 	 */
-	mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
-			     sizeof(struct fcoe_crc_eof));
+	mfs = netdev->mtu;
+	if (netdev->features & NETIF_F_FCOE_MTU) {
+		mfs = FCOE_MTU;
+		FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
+	}
+	mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
 	if (fc_set_mfs(lp, mfs))
 		return -EINVAL;
 
@@ -1570,6 +1574,8 @@ static int fcoe_device_notification(struct notifier_block *notifier,
 	case NETDEV_CHANGE:
 		break;
 	case NETDEV_CHANGEMTU:
+		if (netdev->features & NETIF_F_FCOE_MTU)
+			break;
 		mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
 				     sizeof(struct fcoe_crc_eof));
 		if (mfs >= FC_MIN_MAX_FRAME)

diff --git a/trunk/drivers/scsi/fcoe/fcoe.h b/trunk/drivers/scsi/fcoe/fcoe.h
@@ -40,6 +40,12 @@
 #define FCOE_MIN_XID		0x0000	/* the min xid supported by fcoe_sw */
 #define FCOE_MAX_XID		0x0FFF	/* the max xid supported by fcoe_sw */
 
+/*
+ * Max MTU for FCoE: 14 (FCoE header) + 24 (FC header) + 2112 (max FC payload)
+ * + 4 (FC CRC) + 4 (FCoE trailer) =  2158 bytes
+ */
+#define FCOE_MTU	2158
+
 unsigned int fcoe_debug_logging;
 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");