From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <keith.wiles@intel.com>
Received: from mga03.intel.com (mga03.intel.com [134.134.136.65])
 by dpdk.org (Postfix) with ESMTP id 5437258FA
 for <dev@dpdk.org>; Thu, 27 Dec 2018 18:23:27 +0100 (CET)
X-Amp-Result: SKIPPED(no attachment in message)
X-Amp-File-Uploaded: False
Received: from orsmga006.jf.intel.com ([10.7.209.51])
 by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384;
 27 Dec 2018 09:23:25 -0800
X-ExtLoop1: 1
X-IronPort-AV: E=Sophos;i="5.56,405,1539673200"; d="scan'208";a="103737843"
Received: from kwyoon-mobl.amr.corp.intel.com ([10.251.151.199])
 by orsmga006.jf.intel.com with ESMTP; 27 Dec 2018 09:23:25 -0800
From: Keith Wiles <keith.wiles@intel.com>
To: dev@dpdk.org
Cc: olivier.matz@6wind.com
Date: Thu, 27 Dec 2018 11:23:22 -0600
Message-Id: <20181227172322.25264-1-keith.wiles@intel.com>
X-Mailer: git-send-email 2.18.0
In-Reply-To: <20181216172721.91042-1-keith.wiles@intel.com>
References: <20181216172721.91042-1-keith.wiles@intel.com>
Subject: [dpdk-dev] [PATCH v4] eal:add tailq walk routine
X-BeenThere: dev@dpdk.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://mails.dpdk.org/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://mails.dpdk.org/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://mails.dpdk.org/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
X-List-Received-Date: Thu, 27 Dec 2018 17:23:28 -0000

Signed-off-by: Keith Wiles <keith.wiles@intel.com>
---
V4
  Change function to have a return value.
  to be used to stop walking or continue walking.
V3
  Fix checkpatch warnings adding a commit message.
  Must be using a different checkpatch then on my Ubuntu 18.04 system 
V2
  Fix checkpatch warnings.

 lib/librte_eal/common/eal_common_tailqs.c | 20 ++++++++++++++++++++
 lib/librte_eal/common/include/rte_tailq.h | 16 ++++++++++++++++
 lib/librte_eal/rte_eal_version.map        |  1 +
 3 files changed, 37 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_tailqs.c b/lib/librte_eal/common/eal_common_tailqs.c
index babd3b30a..99e898019 100644
--- a/lib/librte_eal/common/eal_common_tailqs.c
+++ b/lib/librte_eal/common/eal_common_tailqs.c
@@ -69,6 +69,26 @@ rte_dump_tailq(FILE *f)
 	rte_rwlock_read_unlock(&mcfg->qlock);
 }
 
+void
+rte_tailq_walk(int (*iter)(const struct rte_tailq_head *, void *), void *arg)
+{
+	struct rte_mem_config *mcfg;
+	unsigned int i = 0;
+
+	if (!iter)
+		return;
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	rte_rwlock_read_lock(&mcfg->qlock);
+	for (i = 0; i < RTE_MAX_TAILQ; i++) {
+		const struct rte_tailq_head *tailq = &mcfg->tailq_head[i];
+
+		if (iter(tailq, arg) < 0)
+			break;
+	}
+	rte_rwlock_read_unlock(&mcfg->qlock);
+}
+
 static struct rte_tailq_head *
 rte_eal_tailq_create(const char *name)
 {
diff --git a/lib/librte_eal/common/include/rte_tailq.h b/lib/librte_eal/common/include/rte_tailq.h
index 9b01abb2c..25e99658b 100644
--- a/lib/librte_eal/common/include/rte_tailq.h
+++ b/lib/librte_eal/common/include/rte_tailq.h
@@ -18,6 +18,7 @@ extern "C" {
 #include <sys/queue.h>
 #include <stdio.h>
 #include <rte_debug.h>
+#include <rte_compat.h>
 
 /** dummy structure type used by the rte_tailq APIs */
 struct rte_tailq_entry {
@@ -85,6 +86,21 @@ struct rte_tailq_elem {
  */
 void rte_dump_tailq(FILE *f);
 
+/**
+ * Walk the tailq list and call the Iterator function given.
+ *
+ * @param func
+ *   Iterator function called for each tailq list.
+ *   The rte_eal_get_configuration()->mem_config.qlock read lock is held.
+ *   If Iterator returns < 0 then break out of loop.
+ *   If Iterator returns 0 then continue looping.
+ * @param arg
+ *   pointer to user supplied argument passed to Iterator function.
+ */
+void __rte_experimental
+	rte_tailq_walk(int (*iter)(const struct rte_tailq_head *, void *),
+	void *arg);
+
 /**
  * Lookup for a tail queue.
  *
diff --git a/lib/librte_eal/rte_eal_version.map b/lib/librte_eal/rte_eal_version.map
index eb5f7b9cb..288b20b0e 100644
--- a/lib/librte_eal/rte_eal_version.map
+++ b/lib/librte_eal/rte_eal_version.map
@@ -364,4 +364,5 @@ EXPERIMENTAL {
 	rte_service_may_be_active;
 	rte_socket_count;
 	rte_socket_id_by_idx;
+	rte_tailq_walk;
 };
-- 
2.17.1