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From: Stephen Hemminger <stephen@networkplumber.org>
To: dev@dpdk.org
Cc: Stephen Hemminger <stephen@networkplumber.org>,
	Isaac Boukris <iboukris@gmail.com>,
	Reshma Pattan <reshma.pattan@intel.com>
Subject: [PATCH v2 2/4] dumpcap: allow multiple invocations
Date: Thu,  5 Oct 2023 16:06:46 -0700	[thread overview]
Message-ID: <20231005230648.68244-3-stephen@networkplumber.org> (raw)
In-Reply-To: <20231005230648.68244-1-stephen@networkplumber.org>

If dumpcap is run twice with each instance pointing a different
interface, it would fail because of overlap in ring a pool names.
Fix by putting process id in the name.

Fixes: cbb44143be74 ("app/dumpcap: add new packet capture application")
Reported-by: Isaac Boukris <iboukris@gmail.com>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 app/dumpcap/main.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/app/dumpcap/main.c b/app/dumpcap/main.c
index 64294bbfb3e6..37754fd06f4f 100644
--- a/app/dumpcap/main.c
+++ b/app/dumpcap/main.c
@@ -44,7 +44,6 @@
 #include <pcap/pcap.h>
 #include <pcap/bpf.h>
 
-#define RING_NAME "capture-ring"
 #define MONITOR_INTERVAL  (500 * 1000)
 #define MBUF_POOL_CACHE_SIZE 32
 #define BURST_SIZE 32
@@ -647,6 +646,7 @@ static void dpdk_init(void)
 static struct rte_ring *create_ring(void)
 {
 	struct rte_ring *ring;
+	char ring_name[RTE_RING_NAMESIZE];
 	size_t size, log2;
 
 	/* Find next power of 2 >= size. */
@@ -660,28 +660,28 @@ static struct rte_ring *create_ring(void)
 		ring_size = size;
 	}
 
-	ring = rte_ring_lookup(RING_NAME);
-	if (ring == NULL) {
-		ring = rte_ring_create(RING_NAME, ring_size,
-					rte_socket_id(), 0);
-		if (ring == NULL)
-			rte_exit(EXIT_FAILURE, "Could not create ring :%s\n",
-				 rte_strerror(rte_errno));
-	}
+	/* Want one ring per invocation of program */
+	snprintf(ring_name, sizeof(ring_name),
+		 "dumpcap-%u", getpid());
+
+	ring = rte_ring_create(ring_name, ring_size,
+			       rte_socket_id(), 0);
+	if (ring == NULL)
+		rte_exit(EXIT_FAILURE, "Could not create ring :%s\n",
+			 rte_strerror(rte_errno));
+
 	return ring;
 }
 
 static struct rte_mempool *create_mempool(void)
 {
 	const struct interface *intf;
-	static const char pool_name[] = "capture_mbufs";
+	char pool_name[RTE_MEMPOOL_NAMESIZE];
 	size_t num_mbufs = 2 * ring_size;
 	struct rte_mempool *mp;
 	uint32_t data_size = 128;
 
-	mp = rte_mempool_lookup(pool_name);
-	if (mp)
-		return mp;
+	snprintf(pool_name, sizeof(pool_name), "capture_%u", getpid());
 
 	/* Common pool so size mbuf for biggest snap length */
 	TAILQ_FOREACH(intf, &interfaces, next) {
@@ -826,7 +826,7 @@ static void enable_pdump(struct rte_ring *r, struct rte_mempool *mp)
 			rte_exit(EXIT_FAILURE,
 				"Packet dump enable on %u:%s failed %s\n",
 				intf->port, intf->name,
-				rte_strerror(-ret));
+				rte_strerror(rte_errno));
 		}
 
 		if (intf->opts.promisc_mode) {
-- 
2.39.2


  parent reply	other threads:[~2023-10-05 23:07 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-21  4:23 [PATCH 0/4] pcapng fixes Stephen Hemminger
2023-09-21  4:23 ` [PATCH 1/4] pdump: fix setting rte_errno on mp error Stephen Hemminger
2023-09-21  4:23 ` [PATCH 2/4] dumpcap: allow multiple invocations Stephen Hemminger
2023-09-21  6:22   ` Morten Brørup
2023-09-21  7:10     ` Isaac Boukris
2023-11-07  2:34     ` Stephen Hemminger
2023-09-21  4:23 ` [PATCH 3/4] pcapng: change timestamp argument to write_stats Stephen Hemminger
2023-09-21  4:23 ` [PATCH 4/4] pcapng: move timestamp calculation into pdump Stephen Hemminger
2023-10-02  8:15   ` David Marchand
2023-10-04 17:13     ` Stephen Hemminger
2023-10-06  9:10       ` David Marchand
2023-10-06 14:59         ` Kevin Traynor
2023-10-05 23:06 ` [PATCH v2 0/4] dumpcap and pcapng fixes Stephen Hemminger
2023-10-05 23:06   ` [PATCH v2 1/4] pdump: fix setting rte_errno on mp error Stephen Hemminger
2023-10-05 23:06   ` Stephen Hemminger [this message]
2023-10-05 23:06   ` [PATCH v2 3/4] pcapng: modify timestamp calculation Stephen Hemminger
2023-10-05 23:06   ` [PATCH v2 4/4] test: cleanups to pcapng test Stephen Hemminger
2023-11-08 18:35 ` [PATCH v3 0/5] dumpcap and pcapng fixes Stephen Hemminger
2023-11-08 18:35   ` [PATCH v3 1/5] pdump: fix setting rte_errno on mp error Stephen Hemminger
2023-11-09  7:34     ` Morten Brørup
2023-11-08 18:35   ` [PATCH v3 2/5] dumpcap: allow multiple invocations Stephen Hemminger
2023-11-09  7:50     ` Morten Brørup
2023-11-09 15:40       ` Stephen Hemminger
2023-11-09 16:00         ` Morten Brørup
2023-11-09 17:16       ` Stephen Hemminger
2023-11-09 18:22         ` Morten Brørup
2023-11-08 18:35   ` [PATCH v3 3/5] pcapng: modify timestamp calculation Stephen Hemminger
2023-11-09  7:57     ` Morten Brørup
2023-11-08 18:35   ` [PATCH v3 4/5] pcapng: avoid using alloca() Stephen Hemminger
2023-11-09  8:21     ` Morten Brørup
2023-11-09 15:44       ` Stephen Hemminger
2023-11-09 16:25         ` Morten Brørup
2023-11-08 18:35   ` [PATCH v3 5/5] test: cleanups to pcapng test Stephen Hemminger
2023-11-09 17:34 ` [PATCH v4 0/5] dumpcap and pcapng fixes Stephen Hemminger
2023-11-09 17:34   ` [PATCH v4 1/5] pdump: fix setting rte_errno on mp error Stephen Hemminger
2023-11-09 17:34   ` [PATCH v4 2/5] dumpcap: allow multiple invocations Stephen Hemminger
2023-11-09 18:30     ` Morten Brørup
2023-11-09 17:34   ` [PATCH v4 3/5] pcapng: modify timestamp calculation Stephen Hemminger
2023-11-09 17:34   ` [PATCH v4 4/5] pcapng: avoid using alloca() Stephen Hemminger
2023-11-09 17:34   ` [PATCH v4 5/5] test: cleanups to pcapng test Stephen Hemminger
2023-11-09 19:45 ` [PATCH v5 0/5] dumpcap and pcapng fixes Stephen Hemminger
2023-11-09 19:45   ` [PATCH v5 1/5] pdump: fix setting rte_errno on mp error Stephen Hemminger
2023-11-09 19:45   ` [PATCH v5 2/5] dumpcap: allow multiple invocations Stephen Hemminger
2023-11-09 20:09     ` Morten Brørup
2023-11-09 19:45   ` [PATCH v5 3/5] pcapng: modify timestamp calculation Stephen Hemminger
2023-11-12 14:22     ` Thomas Monjalon
2023-11-09 19:45   ` [PATCH v5 4/5] pcapng: avoid using alloca() Stephen Hemminger
2023-11-09 19:45   ` [PATCH v5 5/5] test: cleanups to pcapng test Stephen Hemminger
2023-11-13 16:15 ` [PATCH v6 0/5] dumpcap and pcapng fixes Stephen Hemminger
2023-11-13 16:15   ` [PATCH v6 1/5] pdump: fix setting rte_errno on mp error Stephen Hemminger
2023-11-13 16:15   ` [PATCH v6 2/5] dumpcap: allow multiple invocations Stephen Hemminger
2023-11-13 16:15   ` [PATCH v6 3/5] pcapng: modify timestamp calculation Stephen Hemminger
2023-11-13 16:15   ` [PATCH v6 4/5] pcapng: avoid using alloca() Stephen Hemminger
2023-11-13 16:15   ` [PATCH v6 5/5] test: cleanups to pcapng test Stephen Hemminger
2023-11-17 16:35 ` [PATCH v7 0/5] dumpcap and pcapng fixes Stephen Hemminger
2023-11-17 16:35   ` [PATCH v7 1/5] pdump: fix setting rte_errno on mp error Stephen Hemminger
2023-11-17 16:35   ` [PATCH v7 2/5] dumpcap: allow multiple invocations Stephen Hemminger
2023-11-17 16:35   ` [PATCH v7 3/5] pcapng: modify timestamp calculation Stephen Hemminger
2023-11-17 16:35   ` [PATCH v7 4/5] pcapng: avoid using alloca() Stephen Hemminger
2023-11-17 16:35   ` [PATCH v7 5/5] test: cleanups to pcapng test Stephen Hemminger
2023-11-22 22:42   ` [PATCH v7 0/5] dumpcap and pcapng fixes Thomas Monjalon

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