From: Michał Mirosław <michal.miroslaw@atendesoftware.pl>
Date: Wed, 18 Jan 2017 19:32:51 +0000 (+0100)
Subject: acl: allow zero verdict
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=c6c7a8d7e6a81320b17dccf63e274bd62df262ae;p=dpdk.git

acl: allow zero verdict

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

Signed-off-by: Michał Mirosław <michal.miroslaw@atendesoftware.pl>
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>
---

diff --git a/app/test/test_acl.c b/app/test/test_acl.c
index be744ec23d..c6b511fb19 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 5fd3d348d1..a6bee9ba2d 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 8b7e92cec2..d1f40bef0f 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 caa91f7eab..b53179a839 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 8f1f8cebc5..94b69a9832 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 *