From: Robin Jarry <rjarry@redhat.com>
To: dev@dpdk.org, Vladimir Medvedkin <vladimir.medvedkin@intel.com>
Subject: [PATCH dpdk 2/2] rib: add mode to include top-level route in traversal
Date: Mon, 18 May 2026 11:59:05 +0200 [thread overview]
Message-ID: <20260518095900.29655-8-rjarry@redhat.com> (raw)
In-Reply-To: <20260518095900.29655-6-rjarry@redhat.com>
rte_rib_get_nxt() and rte_rib6_get_nxt() skip the exact match
top-level route when iterating subroutes. This is the expected behavior
in most cases but some users need the full subtree including the root.
Add a RTE_RIB_GET_NXT_ALL_TOP (and RTE_RIB6_GET_NXT_ALL_TOP) mode
that uses >= instead of > when comparing depths so that the top-level
route is returned as well.
Signed-off-by: Robin Jarry <rjarry@redhat.com>
---
app/test/test_rib.c | 16 ++++++++++++++++
app/test/test_rib6.c | 16 ++++++++++++++++
lib/rib/rte_rib.c | 12 ++++++++++--
lib/rib/rte_rib.h | 4 ++++
lib/rib/rte_rib6.c | 12 ++++++++++--
lib/rib/rte_rib6.h | 4 ++++
6 files changed, 60 insertions(+), 4 deletions(-)
diff --git a/app/test/test_rib.c b/app/test/test_rib.c
index a4a683140df3..f56490e67ec0 100644
--- a/app/test/test_rib.c
+++ b/app/test/test_rib.c
@@ -300,6 +300,7 @@ test_tree_traversal(void)
uint32_t ip1 = RTE_IPV4(10, 10, 10, 0);
uint32_t ip2 = RTE_IPV4(10, 10, 130, 80);
uint8_t depth = 30;
+ unsigned int num;
config.max_nodes = MAX_RULES;
config.ext_sz = 0;
@@ -313,11 +314,26 @@ test_tree_traversal(void)
node = rte_rib_insert(rib, ip2, depth);
RTE_TEST_ASSERT(node != NULL, "Failed to insert rule\n");
+ node = rte_rib_insert(rib, 0, 0);
+ RTE_TEST_ASSERT(node != NULL, "Failed to insert default rule\n");
+
node = NULL;
node = rte_rib_get_nxt(rib, RTE_IPV4(10, 10, 130, 0), 24, node,
RTE_RIB_GET_NXT_ALL);
RTE_TEST_ASSERT(node != NULL, "Failed to get rib_node\n");
+ num = 0;
+ node = NULL;
+ while ((node = rte_rib_get_nxt(rib, 0, 0, node, RTE_RIB_GET_NXT_ALL)) != NULL)
+ num++;
+ RTE_TEST_ASSERT(num == 2, "Invalid number of routes\n");
+
+ num = 0;
+ node = NULL;
+ while ((node = rte_rib_get_nxt(rib, 0, 0, node, RTE_RIB_GET_NXT_ALL_TOP)) != NULL)
+ num++;
+ RTE_TEST_ASSERT(num == 3, "Default route not returned by rte_rib_get_nxt\n");
+
rte_rib_free(rib);
return TEST_SUCCESS;
diff --git a/app/test/test_rib6.c b/app/test/test_rib6.c
index 0295a9640cfa..542c955eee8c 100644
--- a/app/test/test_rib6.c
+++ b/app/test/test_rib6.c
@@ -300,7 +300,9 @@ test_tree_traversal(void)
struct rte_ipv6_addr ip = RTE_IPV6(0x0a00, 0x0282, 0, 0, 0, 0, 0, 0);
struct rte_ipv6_addr ip1 = RTE_IPV6(0x0a00, 0x0200, 0, 0, 0, 0, 0, 0);
struct rte_ipv6_addr ip2 = RTE_IPV6(0x0a00, 0x0282, 0, 0, 0, 0, 0, 0x0050);
+ struct rte_ipv6_addr unspec = RTE_IPV6(0, 0, 0, 0, 0, 0, 0, 0);
uint8_t depth = 126;
+ unsigned int num;
config.max_nodes = MAX_RULES;
config.ext_sz = 0;
@@ -312,11 +314,25 @@ test_tree_traversal(void)
RTE_TEST_ASSERT(node != NULL, "Failed to insert rule\n");
node = rte_rib6_insert(rib, &ip2, depth);
RTE_TEST_ASSERT(node != NULL, "Failed to insert rule\n");
+ node = rte_rib6_insert(rib, &unspec, 0);
+ RTE_TEST_ASSERT(node != NULL, "Failed to insert default route\n");
node = NULL;
node = rte_rib6_get_nxt(rib, &ip, 32, node, RTE_RIB6_GET_NXT_ALL);
RTE_TEST_ASSERT(node != NULL, "Failed to get rib_node\n");
+ num = 0;
+ node = NULL;
+ while ((node = rte_rib6_get_nxt(rib, 0, 0, node, RTE_RIB6_GET_NXT_ALL)) != NULL)
+ num++;
+ RTE_TEST_ASSERT(num == 2, "Invalid number of routes\n");
+
+ num = 0;
+ node = NULL;
+ while ((node = rte_rib6_get_nxt(rib, 0, 0, node, RTE_RIB6_GET_NXT_ALL_TOP)) != NULL)
+ num++;
+ RTE_TEST_ASSERT(num == 3, "Default route not returned by rte_rib6_get_nxt\n");
+
rte_rib6_free(rib);
return TEST_SUCCESS;
diff --git a/lib/rib/rte_rib.c b/lib/rib/rte_rib.c
index 89061829a23c..a3c287e215ec 100644
--- a/lib/rib/rte_rib.c
+++ b/lib/rib/rte_rib.c
@@ -167,6 +167,14 @@ rte_rib_lookup_exact(struct rte_rib *rib, uint32_t ip, uint8_t depth)
return __rib_lookup_exact(rib, ip, depth);
}
+static bool
+depth_match(struct rte_rib_node *node, uint8_t depth, int flag)
+{
+ if (flag == RTE_RIB_GET_NXT_ALL_TOP)
+ return node->depth >= depth;
+ return node->depth > depth;
+}
+
/*
* Traverses on subtree and retrieves more specific routes
* for a given in args ip/depth prefix
@@ -195,7 +203,7 @@ rte_rib_get_nxt(struct rte_rib *rib, uint32_t ip,
tmp = tmp->parent;
if (is_valid_node(tmp) &&
(is_covered(tmp->ip, ip, depth) &&
- (tmp->depth > depth)))
+ (depth_match(tmp, depth, mode))))
return tmp;
}
tmp = (tmp->parent) ? tmp->parent->right : NULL;
@@ -203,7 +211,7 @@ rte_rib_get_nxt(struct rte_rib *rib, uint32_t ip,
while (tmp) {
if (is_valid_node(tmp) &&
(is_covered(tmp->ip, ip, depth) &&
- (tmp->depth > depth))) {
+ (depth_match(tmp, depth, mode)))) {
prev = tmp;
if (mode == RTE_RIB_GET_NXT_COVER)
return prev;
diff --git a/lib/rib/rte_rib.h b/lib/rib/rte_rib.h
index 0fabfb2a41a6..5e72fa9273e2 100644
--- a/lib/rib/rte_rib.h
+++ b/lib/rib/rte_rib.h
@@ -31,6 +31,8 @@ enum rte_rib_nxt_mode {
RTE_RIB_GET_NXT_ALL,
/** get first matched subroutes in a RIB tree, excluding any exact match top-level route */
RTE_RIB_GET_NXT_COVER,
+ /** get all subroutes in a RIB tree, including the exact match top-level route, if any */
+ RTE_RIB_GET_NXT_ALL_TOP,
};
struct rte_rib;
@@ -125,6 +127,8 @@ rte_rib_lookup_exact(struct rte_rib *rib, uint32_t ip, uint8_t depth);
* get all prefixes from subtrie
* -RTE_RIB_GET_NXT_COVER
* get only first more specific prefix even if it have more specifics
+ * -RTE_RIB_GET_NXT_ALL_TOP
+ * get the top-level exact matching prefix, if any
* @return
* pointer to the next more specific prefix
* NULL if there is no prefixes left
diff --git a/lib/rib/rte_rib6.c b/lib/rib/rte_rib6.c
index c23881f6247e..5114fb522e3e 100644
--- a/lib/rib/rte_rib6.c
+++ b/lib/rib/rte_rib6.c
@@ -186,6 +186,14 @@ rte_rib6_lookup_exact(struct rte_rib6 *rib,
return NULL;
}
+static bool
+depth_match(struct rte_rib6_node *node, uint8_t depth, enum rte_rib6_nxt_mode mode)
+{
+ if (mode == RTE_RIB6_GET_NXT_ALL_TOP)
+ return node->depth >= depth;
+ return node->depth > depth;
+}
+
/*
* Traverses on subtree and retrieves more specific routes
* for a given in args ip/depth prefix
@@ -219,7 +227,7 @@ rte_rib6_get_nxt(struct rte_rib6 *rib,
tmp = tmp->parent;
if (is_valid_node(tmp) &&
(rte_ipv6_addr_eq_prefix(&tmp->ip, &tmp_ip, depth) &&
- (tmp->depth > depth)))
+ (depth_match(tmp, depth, mode))))
return tmp;
}
tmp = (tmp->parent != NULL) ? tmp->parent->right : NULL;
@@ -227,7 +235,7 @@ rte_rib6_get_nxt(struct rte_rib6 *rib,
while (tmp) {
if (is_valid_node(tmp) &&
(rte_ipv6_addr_eq_prefix(&tmp->ip, &tmp_ip, depth) &&
- (tmp->depth > depth))) {
+ (depth_match(tmp, depth, mode)))) {
prev = tmp;
if (mode == RTE_RIB6_GET_NXT_COVER)
return prev;
diff --git a/lib/rib/rte_rib6.h b/lib/rib/rte_rib6.h
index ed2761492bc8..1d8b56b89b13 100644
--- a/lib/rib/rte_rib6.h
+++ b/lib/rib/rte_rib6.h
@@ -32,6 +32,8 @@ enum rte_rib6_nxt_mode {
RTE_RIB6_GET_NXT_ALL,
/** get first matched subroutes in a RIB tree, excluding any exact match top-level route */
RTE_RIB6_GET_NXT_COVER,
+ /** get all subroutes in a RIB tree, including the exact match top-level route, if any */
+ RTE_RIB6_GET_NXT_ALL_TOP,
};
struct rte_rib6;
@@ -184,6 +186,8 @@ rte_rib6_lookup_exact(struct rte_rib6 *rib,
* get all prefixes from subtrie
* -RTE_RIB6_GET_NXT_COVER
* get only first more specific prefix even if it have more specifics
+ * -RTE_RIB6_GET_NXT_ALL_TOP
+ * get the top-level exact matching prefix, if any
* @return
* pointer to the next more specific prefix
* NULL if there is no prefixes left
--
2.54.0
prev parent reply other threads:[~2026-05-18 10:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-18 9:59 [PATCH dpdk 0/2] rib: allow iteration to include the top-level route Robin Jarry
2026-05-18 9:59 ` [PATCH dpdk 1/2] rib: rename nxt flag parameter to mode Robin Jarry
2026-05-18 9:59 ` Robin Jarry [this message]
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