[dpdk-dev] [PATCH 2/2] acl: allow zero verdict

[Michał Mirosław]

This enables ACL matches to return 0 where the distinction
from no-match case is not needed.

From: Michał Mirosław <michal.miroslaw at atendesoftware.pl>
Signed-off-by: Michał Mirosław <michal.miroslaw at atendesoftware.pl>
---
 app/test/test_acl.c                                  | 13 -------------
 doc/guides/prog_guide/packet_classif_access_ctrl.rst |  3 ++-
 lib/librte_acl/rte_acl.c                             |  3 +--
 lib/librte_acl/rte_acl.h                             |  2 --
 lib/librte_table/rte_table_acl.c                     |  2 +-
 5 files changed, 4 insertions(+), 19 deletions(-)

diff --git a/app/test/test_acl.c b/app/test/test_acl.c
index be744ec23..c6b511fb1 100644
--- a/app/test/test_acl.c
+++ b/app/test/test_acl.c
@@ -1357,19 +1357,6 @@ test_invalid_rules(void)
 		goto err;
 	}
 
-	rule.dst_mask_len = 0;
-	rule.src_mask_len = 0;
-	rule.data.userdata = 0;
-
-	/* try adding this rule (it should fail because userdata is invalid) */
-	ret = rte_acl_ipv4vlan_add_rules(acx, &rule, 1);
-	if (ret == 0) {
-		printf("Line %i: Adding a rule with invalid user data "
-				"should have failed!\n", __LINE__);
-		rte_acl_free(acx);
-		return -1;
-	}
-
 	rte_acl_free(acx);
 
 	return 0;
diff --git a/doc/guides/prog_guide/packet_classif_access_ctrl.rst b/doc/guides/prog_guide/packet_classif_access_ctrl.rst
index 5fd3d348d..a6bee9ba2 100644
--- a/doc/guides/prog_guide/packet_classif_access_ctrl.rst
+++ b/doc/guides/prog_guide/packet_classif_access_ctrl.rst
@@ -329,8 +329,9 @@ When creating a set of rules, for each rule, additional information must be supp
     Each set could be assigned its own category and by combining them into a single database,
     one lookup returns a result for each of the four sets.
 
-*   **userdata**: A user-defined field that could be any value except zero.
+*   **userdata**: A user-defined value.
     For each category, a successful match returns the userdata field of the highest priority matched rule.
+    When no rules match, returned value is zero.
 
 .. note::
 
diff --git a/lib/librte_acl/rte_acl.c b/lib/librte_acl/rte_acl.c
index 8b7e92cec..d1f40bef0 100644
--- a/lib/librte_acl/rte_acl.c
+++ b/lib/librte_acl/rte_acl.c
@@ -313,8 +313,7 @@ acl_check_rule(const struct rte_acl_rule_data *rd)
 	if ((RTE_LEN2MASK(RTE_ACL_MAX_CATEGORIES, typeof(rd->category_mask)) &
 			rd->category_mask) == 0 ||
 			rd->priority > RTE_ACL_MAX_PRIORITY ||
-			rd->priority < RTE_ACL_MIN_PRIORITY ||
-			rd->userdata == RTE_ACL_INVALID_USERDATA)
+			rd->priority < RTE_ACL_MIN_PRIORITY)
 		return -EINVAL;
 	return 0;
 }
diff --git a/lib/librte_acl/rte_acl.h b/lib/librte_acl/rte_acl.h
index caa91f7ea..b53179a83 100644
--- a/lib/librte_acl/rte_acl.h
+++ b/lib/librte_acl/rte_acl.h
@@ -120,8 +120,6 @@ enum {
 	RTE_ACL_MIN_PRIORITY = 0,
 };
 
-#define	RTE_ACL_INVALID_USERDATA	0
-
 #define	RTE_ACL_MASKLEN_TO_BITMASK(v, s)	\
 ((v) == 0 ? (v) : (typeof(v))((uint64_t)-1 << ((s) * CHAR_BIT - (v))))
 
diff --git a/lib/librte_table/rte_table_acl.c b/lib/librte_table/rte_table_acl.c
index 8f1f8cebc..94b69a983 100644
--- a/lib/librte_table/rte_table_acl.c
+++ b/lib/librte_table/rte_table_acl.c
@@ -792,7 +792,7 @@ rte_table_acl_lookup(
 
 		pkts_mask &= ~pkt_mask;
 
-		if (action_table_pos != RTE_ACL_INVALID_USERDATA) {
+		if (action_table_pos != 0) {
 			pkts_out_mask |= pkt_mask;
 			entries[pkt_pos] = (void *)
 				&acl->memory[action_table_pos *
-- 
2.11.0