ptp: Change ptp_class to a proper bitmask

Change the definition of PTP_CLASS_L2 to not have any bits overlapping with
the other defined protocol values, allowing the PTP_CLASS_* definitions to
be for simple filtering on packet type.

Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/ptp_classify.h

@@ -32,9 +32,9 @@
 #define PTP_CLASS_VMASK 0x0f /* max protocol version is 15 */
 #define PTP_CLASS_IPV4  0x10 /* event in an IPV4 UDP packet */
 #define PTP_CLASS_IPV6  0x20 /* event in an IPV6 UDP packet */
-#define PTP_CLASS_L2    0x30 /* event in a L2 packet */
-#define PTP_CLASS_PMASK 0x30 /* mask for the packet type field */
-#define PTP_CLASS_VLAN  0x40 /* event in a VLAN tagged packet */
+#define PTP_CLASS_L2    0x40 /* event in a L2 packet */
+#define PTP_CLASS_PMASK	0x70 /* mask for the packet type field */
+#define PTP_CLASS_VLAN	0x80 /* event in a VLAN tagged packet */
 
 #define PTP_CLASS_V1_IPV4 (PTP_CLASS_V1 | PTP_CLASS_IPV4)
 #define PTP_CLASS_V1_IPV6 (PTP_CLASS_V1 | PTP_CLASS_IPV6) /* probably DNE */
@@ -42,6 +42,7 @@
 #define PTP_CLASS_V2_IPV6 (PTP_CLASS_V2 | PTP_CLASS_IPV6)
 #define PTP_CLASS_V2_L2   (PTP_CLASS_V2 | PTP_CLASS_L2)
 #define PTP_CLASS_V2_VLAN (PTP_CLASS_V2 | PTP_CLASS_VLAN)
+#define PTP_CLASS_L4      (PTP_CLASS_IPV4 | PTP_CLASS_IPV6)
 
 #define PTP_EV_PORT 319
 #define PTP_GEN_BIT 0x08 /* indicates general message, if set in message type */

net/core/ptp_classifier.c

@@ -58,7 +58,7 @@
  *   jneq #0x0, drop_ieee1588      ; for PTP_GEN_BIT and drop these
  *   ldh [18]                      ; reload payload
  *   and #0xf                      ; mask PTP_CLASS_VMASK
- *   or #0x70                      ; PTP_CLASS_VLAN|PTP_CLASS_L2
+ *   or #0xc0                      ; PTP_CLASS_VLAN|PTP_CLASS_L2
  *   ret a                         ; return PTP class
  *
  * ; PTP over UDP over IPv4 over 802.1Q over Ethernet
@@ -73,7 +73,7 @@
  *   jneq #319, drop_8021q_ipv4    ; is port PTP_EV_PORT ?
  *   ldh [x + 26]                  ; load payload
  *   and #0xf                      ; mask PTP_CLASS_VMASK
- *   or #0x50                      ; PTP_CLASS_VLAN|PTP_CLASS_IPV4
+ *   or #0x90                      ; PTP_CLASS_VLAN|PTP_CLASS_IPV4
  *   ret a                         ; return PTP class
  *   drop_8021q_ipv4: ret #0x0     ; PTP_CLASS_NONE
  *
@@ -86,7 +86,7 @@
  *   jneq #319, drop_8021q_ipv6          ; is port PTP_EV_PORT ?
  *   ldh [66]                      ; load payload
  *   and #0xf                      ; mask PTP_CLASS_VMASK
- *   or #0x60                      ; PTP_CLASS_VLAN|PTP_CLASS_IPV6
+ *   or #0xa0                      ; PTP_CLASS_VLAN|PTP_CLASS_IPV6
  *   ret a                         ; return PTP class
  *   drop_8021q_ipv6: ret #0x0     ; PTP_CLASS_NONE
  *
@@ -98,7 +98,7 @@
  *   jneq #0x0, drop_ieee1588      ; for PTP_GEN_BIT and drop these
  *   ldh [14]                      ; reload payload
  *   and #0xf                      ; mask PTP_CLASS_VMASK
- *   or #0x30                      ; PTP_CLASS_L2
+ *   or #0x40                      ; PTP_CLASS_L2
  *   ret a                         ; return PTP class
  *   drop_ieee1588: ret #0x0       ; PTP_CLASS_NONE
  */
@@ -150,7 +150,7 @@ void __init ptp_classifier_init(void)
 		{ 0x15,  0, 35, 0x00000000 },
 		{ 0x28,  0,  0, 0x00000012 },
 		{ 0x54,  0,  0, 0x0000000f },
-		{ 0x44,  0,  0, 0x00000070 },
+		{ 0x44,  0,  0, 0x000000c0 },
 		{ 0x16,  0,  0, 0x00000000 },
 		{ 0x15,  0, 12, 0x00000800 },
 		{ 0x30,  0,  0, 0x0000001b },
@@ -162,7 +162,7 @@ void __init ptp_classifier_init(void)
 		{ 0x15,  0,  4, 0x0000013f },
 		{ 0x48,  0,  0, 0x0000001a },
 		{ 0x54,  0,  0, 0x0000000f },
-		{ 0x44,  0,  0, 0x00000050 },
+		{ 0x44,  0,  0, 0x00000090 },
 		{ 0x16,  0,  0, 0x00000000 },
 		{ 0x06,  0,  0, 0x00000000 },
 		{ 0x15,  0,  8, 0x000086dd },
@@ -172,7 +172,7 @@ void __init ptp_classifier_init(void)
 		{ 0x15,  0,  4, 0x0000013f },
 		{ 0x28,  0,  0, 0x00000042 },
 		{ 0x54,  0,  0, 0x0000000f },
-		{ 0x44,  0,  0, 0x00000060 },
+		{ 0x44,  0,  0, 0x000000a0 },
 		{ 0x16,  0,  0, 0x00000000 },
 		{ 0x06,  0,  0, 0x00000000 },
 		{ 0x15,  0,  7, 0x000088f7 },
@@ -181,7 +181,7 @@ void __init ptp_classifier_init(void)
 		{ 0x15,  0,  4, 0x00000000 },
 		{ 0x28,  0,  0, 0x0000000e },
 		{ 0x54,  0,  0, 0x0000000f },
-		{ 0x44,  0,  0, 0x00000030 },
+		{ 0x44,  0,  0, 0x00000040 },
 		{ 0x16,  0,  0, 0x00000000 },
 		{ 0x06,  0,  0, 0x00000000 },
 	};