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net: sched: add helpers to handle extended actions

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Jump is now the only one using value action opcode. This is going to
change soon. So introduce helpers to work with this. Convert TC_ACT_JUMP.

This also fixes the TC_ACT_JUMP check, which is incorrectly done as a
bit check, not a value check.

Fixes: e0ee84ded7 ("net sched actions: Complete the JUMPX opcode")
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2017-05-02 10:12:00 +02:00 committed by David S. Miller
parent 5657f89abb
commit 9da3242e6a
2 changed files with 15 additions and 2 deletions
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15
include/uapi/linux/pkt_cls.h
View File

@ -37,7 +37,20 @@ enum {
#define TC_ACT_QUEUED 5
#define TC_ACT_REPEAT 6
#define TC_ACT_REDIRECT 7
#define TC_ACT_JUMP 0x10000000
/* There is a special kind of actions called "extended actions",
* which need a value parameter. These have a local opcode located in
* the highest nibble, starting from 1. The rest of the bits
* are used to carry the value. These two parts together make
* a combined opcode.
*/
#define __TC_ACT_EXT_SHIFT 28
#define __TC_ACT_EXT(local) ((local) << __TC_ACT_EXT_SHIFT)
#define TC_ACT_EXT_VAL_MASK ((1 << __TC_ACT_EXT_SHIFT) - 1)
#define TC_ACT_EXT_CMP(combined, opcode) \
(((combined) & (~TC_ACT_EXT_VAL_MASK)) == opcode)
#define TC_ACT_JUMP __TC_ACT_EXT(1)
/* Action type identifiers*/
enum {

2
net/sched/act_api.c
View File

@ -453,7 +453,7 @@ repeat:
if (ret == TC_ACT_REPEAT)
goto repeat; /* we need a ttl - JHS */
if (ret & TC_ACT_JUMP) {
if (TC_ACT_EXT_CMP(ret, TC_ACT_JUMP)) {
jmp_prgcnt = ret & TCA_ACT_MAX_PRIO_MASK;
if (!jmp_prgcnt || (jmp_prgcnt > nr_actions)) {
/* faulty opcode, stop pipeline */