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authorRemy Horton <remy.horton@intel.com>2016-06-15 16:25:51 +0100
committerThomas Monjalon <thomas.monjalon@6wind.com>2016-06-16 18:27:00 +0200
commit7b2a704c4e84dcc11ffa381293d2c3d686a999b8 (patch)
tree35cd9d7bbd659936e08df331705ba3d70d073ad7 /examples
parent90c622f356795ed8f6a340219e0ce7a911f5ced8 (diff)
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examples/l2fwd-keepalive: add IPC liveness reporting
Changes the l2fwd keepalive example to show how the new keepalive enhancements can be used to relay core state to an external process. Signed-off-by: Remy Horton <remy.horton@intel.com>
Diffstat (limited to 'examples')
-rw-r--r--examples/Makefile1
-rw-r--r--examples/l2fwd-keepalive/Makefile5
-rw-r--r--examples/l2fwd-keepalive/ka-agent/Makefile49
-rw-r--r--examples/l2fwd-keepalive/ka-agent/main.c150
-rw-r--r--examples/l2fwd-keepalive/main.c22
-rw-r--r--examples/l2fwd-keepalive/shm.c129
-rw-r--r--examples/l2fwd-keepalive/shm.h89
7 files changed, 441 insertions, 4 deletions
diff --git a/examples/Makefile b/examples/Makefile
index 3bc635a..f650d3e 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -64,6 +64,7 @@ DIRS-$(CONFIG_RTE_LIBRTE_CRYPTODEV) += l2fwd-crypto
DIRS-$(CONFIG_RTE_LIBRTE_IVSHMEM) += l2fwd-ivshmem
DIRS-$(CONFIG_RTE_LIBRTE_JOBSTATS) += l2fwd-jobstats
DIRS-y += l2fwd-keepalive
+DIRS-y += l2fwd-keepalive/ka-agent
DIRS-$(CONFIG_RTE_LIBRTE_LPM) += l3fwd
DIRS-$(CONFIG_RTE_LIBRTE_ACL) += l3fwd-acl
ifeq ($(CONFIG_RTE_LIBRTE_LPM),y)
diff --git a/examples/l2fwd-keepalive/Makefile b/examples/l2fwd-keepalive/Makefile
index 568edcb..ca45a79 100644
--- a/examples/l2fwd-keepalive/Makefile
+++ b/examples/l2fwd-keepalive/Makefile
@@ -1,6 +1,6 @@
# BSD LICENSE
#
-# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+# Copyright(c) 2010-2016 Intel Corporation. All rights reserved.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
@@ -42,9 +42,10 @@ include $(RTE_SDK)/mk/rte.vars.mk
APP = l2fwd-keepalive
# all source are stored in SRCS-y
-SRCS-y := main.c
+SRCS-y := main.c shm.c
CFLAGS += -O3
CFLAGS += $(WERROR_FLAGS)
+LDFLAGS += -lrt
include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/examples/l2fwd-keepalive/ka-agent/Makefile b/examples/l2fwd-keepalive/ka-agent/Makefile
new file mode 100644
index 0000000..fd0c38b
--- /dev/null
+++ b/examples/l2fwd-keepalive/ka-agent/Makefile
@@ -0,0 +1,49 @@
+# BSD LICENSE
+#
+# Copyright(c) 2016 Intel Corporation. All rights reserved.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in
+# the documentation and/or other materials provided with the
+# distribution.
+# * Neither the name of Intel Corporation nor the names of its
+# contributors may be used to endorse or promote products derived
+# from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ifeq ($(RTE_SDK),)
+$(error "Please define RTE_SDK environment variable")
+endif
+
+# Default target, can be overridden by command line or environment
+RTE_TARGET ?= x86_64-native-linuxapp-gcc
+
+include $(RTE_SDK)/mk/rte.vars.mk
+
+# binary name
+APP = ka-agent
+
+# all source are stored in SRCS-y
+SRCS-y := main.c
+
+CFLAGS += $(WERROR_FLAGS) -I$(SRCDIR)/../
+LDFLAGS += -lrt
+include $(RTE_SDK)/mk/rte.extapp.mk
diff --git a/examples/l2fwd-keepalive/ka-agent/main.c b/examples/l2fwd-keepalive/ka-agent/main.c
new file mode 100644
index 0000000..be1c7f4
--- /dev/null
+++ b/examples/l2fwd-keepalive/ka-agent/main.c
@@ -0,0 +1,150 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2016 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <sys/queue.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <time.h>
+
+#include <rte_keepalive.h>
+
+#include <shm.h>
+
+#define MAX_TIMEOUTS 4
+#define SEM_TIMEOUT_SECS 2
+
+static struct rte_keepalive_shm *ka_shm_create(void)
+{
+ int fd = shm_open(RTE_KEEPALIVE_SHM_NAME, O_RDWR, 0666);
+ size_t size = sizeof(struct rte_keepalive_shm);
+ struct rte_keepalive_shm *shm;
+
+ if (fd < 0)
+ printf("Failed to open %s as SHM:%s\n",
+ RTE_KEEPALIVE_SHM_NAME,
+ strerror(errno));
+ else {
+ shm = (struct rte_keepalive_shm *) mmap(
+ 0, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ close(fd);
+ if (shm == MAP_FAILED)
+ printf("Failed to mmap SHM:%s\n", strerror(errno));
+ else
+ return shm;
+ }
+
+ /* Reset to zero, as it was set to MAP_FAILED aka: (void *)-1 */
+ shm = 0;
+ return NULL;
+}
+
+int main(void)
+{
+ struct rte_keepalive_shm *shm = ka_shm_create();
+ struct timespec timeout = { .tv_nsec = 0 };
+ int idx_core;
+ int cnt_cores;
+ uint64_t last_seen_alive_time = 0;
+ uint64_t most_recent_alive_time;
+ int cnt_timeouts = 0;
+ int sem_errno;
+
+ if (shm == NULL) {
+ printf("Unable to access shared core state\n");
+ return 1;
+ }
+ while (1) {
+ most_recent_alive_time = 0;
+ for (idx_core = 0; idx_core < RTE_KEEPALIVE_MAXCORES;
+ idx_core++)
+ if (shm->core_last_seen_times[idx_core] >
+ most_recent_alive_time)
+ most_recent_alive_time =
+ shm->core_last_seen_times[idx_core];
+
+ timeout.tv_sec = time(NULL) + SEM_TIMEOUT_SECS;
+ if (sem_timedwait(&shm->core_died, &timeout) == -1) {
+ /* Assume no core death signals and no change in any
+ * last-seen times is the keepalive monitor itself
+ * failing.
+ */
+ sem_errno = errno;
+ last_seen_alive_time = most_recent_alive_time;
+ if (sem_errno == ETIMEDOUT) {
+ if (last_seen_alive_time ==
+ most_recent_alive_time &&
+ cnt_timeouts++ >
+ MAX_TIMEOUTS) {
+ printf("No updates. Exiting..\n");
+ break;
+ }
+ } else
+ printf("sem_timedwait() error (%s)\n",
+ strerror(sem_errno));
+ continue;
+ }
+ cnt_timeouts = 0;
+
+ cnt_cores = 0;
+ for (idx_core = 0; idx_core < RTE_KEEPALIVE_MAXCORES;
+ idx_core++)
+ if (shm->core_state[idx_core] == RTE_KA_STATE_DEAD)
+ cnt_cores++;
+ if (cnt_cores == 0) {
+ /* Can happen if core was restarted since Semaphore
+ * was sent, due to agent being offline.
+ */
+ printf("Warning: Empty dead core report\n");
+ continue;
+ }
+
+ printf("%i dead cores: ", cnt_cores);
+ for (idx_core = 0;
+ idx_core < RTE_KEEPALIVE_MAXCORES;
+ idx_core++)
+ if (shm->core_state[idx_core] == RTE_KA_STATE_DEAD)
+ printf("%d, ", idx_core);
+ printf("\b\b\n");
+ }
+ if (munmap(shm, sizeof(struct rte_keepalive_shm)) != 0)
+ printf("Warning: munmap() failed\n");
+ return 0;
+}
diff --git a/examples/l2fwd-keepalive/main.c b/examples/l2fwd-keepalive/main.c
index 4a0d9b6..84a59eb 100644
--- a/examples/l2fwd-keepalive/main.c
+++ b/examples/l2fwd-keepalive/main.c
@@ -72,6 +72,8 @@
#include <rte_timer.h>
#include <rte_keepalive.h>
+#include "shm.h"
+
#define RTE_LOGTYPE_L2FWD RTE_LOGTYPE_USER1
#define NB_MBUF 8192
@@ -523,7 +525,7 @@ check_all_ports_link_status(uint8_t port_num, uint32_t port_mask)
}
static void
-dead_core(__attribute__((unused)) void *ptr_data, const int id_core)
+dead_core(__rte_unused void *ptr_data, const int id_core)
{
printf("Dead core %i - restarting..\n", id_core);
if (rte_eal_get_lcore_state(id_core) == FINISHED) {
@@ -534,6 +536,14 @@ dead_core(__attribute__((unused)) void *ptr_data, const int id_core)
}
}
+static void
+relay_core_state(void *ptr_data, const int id_core,
+ const enum rte_keepalive_state core_state, uint64_t last_alive)
+{
+ rte_keepalive_relayed_state((struct rte_keepalive_shm *)ptr_data,
+ id_core, core_state, last_alive);
+}
+
int
main(int argc, char **argv)
{
@@ -722,10 +732,18 @@ main(int argc, char **argv)
rte_timer_init(&stats_timer);
if (check_period > 0) {
+ struct rte_keepalive_shm *ka_shm;
+
+ ka_shm = rte_keepalive_shm_create();
+ if (ka_shm == NULL)
+ rte_exit(EXIT_FAILURE,
+ "rte_keepalive_shm_create() failed");
rte_global_keepalive_info =
- rte_keepalive_create(&dead_core, NULL);
+ rte_keepalive_create(&dead_core, ka_shm);
if (rte_global_keepalive_info == NULL)
rte_exit(EXIT_FAILURE, "init_keep_alive() failed");
+ rte_keepalive_register_relay_callback(rte_global_keepalive_info,
+ relay_core_state, ka_shm);
rte_timer_init(&hb_timer);
if (rte_timer_reset(&hb_timer,
(check_period * rte_get_timer_hz()) / 1000,
diff --git a/examples/l2fwd-keepalive/shm.c b/examples/l2fwd-keepalive/shm.c
new file mode 100644
index 0000000..66fc433
--- /dev/null
+++ b/examples/l2fwd-keepalive/shm.c
@@ -0,0 +1,129 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2016 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <time.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_keepalive.h>
+
+#include "shm.h"
+
+struct rte_keepalive_shm *rte_keepalive_shm_create(void)
+{
+ int fd;
+ int idx_core;
+ struct rte_keepalive_shm *ka_shm;
+
+ /* If any existing object is not unlinked, it makes it all too easy
+ * for clients to end up with stale shared memory blocks when
+ * restarted. Unlinking makes sure subsequent shm_open by clients
+ * will get the new block mapped below.
+ */
+ if (shm_unlink(RTE_KEEPALIVE_SHM_NAME) == -1 && errno != ENOENT)
+ printf("Warning: Error unlinking stale %s (%s)\n",
+ RTE_KEEPALIVE_SHM_NAME, strerror(errno));
+
+ fd = shm_open(RTE_KEEPALIVE_SHM_NAME,
+ O_CREAT | O_TRUNC | O_RDWR, 0666);
+ if (fd < 0)
+ RTE_LOG(INFO, EAL,
+ "Failed to open %s as SHM (%s)\n",
+ RTE_KEEPALIVE_SHM_NAME,
+ strerror(errno));
+ else if (ftruncate(fd, sizeof(struct rte_keepalive_shm)) != 0)
+ RTE_LOG(INFO, EAL,
+ "Failed to resize SHM (%s)\n", strerror(errno));
+ else {
+ ka_shm = (struct rte_keepalive_shm *) mmap(
+ 0, sizeof(struct rte_keepalive_shm),
+ PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ close(fd);
+ if (ka_shm == MAP_FAILED)
+ RTE_LOG(INFO, EAL,
+ "Failed to mmap SHM (%s)\n", strerror(errno));
+ else {
+ memset(ka_shm, 0, sizeof(struct rte_keepalive_shm));
+
+ /* Initialize the semaphores for IPC/SHM use */
+ if (sem_init(&ka_shm->core_died, 1, 0) != 0) {
+ RTE_LOG(INFO, EAL,
+ "Failed to setup SHM semaphore (%s)\n",
+ strerror(errno));
+ return NULL;
+ }
+
+ /* Set all cores to 'not present' */
+ for (idx_core = 0;
+ idx_core < RTE_KEEPALIVE_MAXCORES;
+ idx_core++) {
+ ka_shm->core_state[idx_core] =
+ RTE_KA_STATE_UNUSED;
+ ka_shm->core_last_seen_times[idx_core] = 0;
+ }
+
+ return ka_shm;
+ }
+ }
+return NULL;
+}
+
+void rte_keepalive_relayed_state(struct rte_keepalive_shm *shm,
+ const int id_core, const enum rte_keepalive_state core_state,
+ __rte_unused uint64_t last_alive)
+{
+ int count;
+
+ shm->core_state[id_core] = core_state;
+ shm->core_last_seen_times[id_core] = last_alive;
+
+ if (core_state == RTE_KEEPALIVE_SHM_DEAD) {
+ /* Since core has died, also signal ka_agent.
+ *
+ * Limit number of times semaphore can be incremented, in case
+ * ka_agent is not active.
+ */
+ if (sem_getvalue(&shm->core_died, &count) == -1) {
+ RTE_LOG(INFO, EAL, "Semaphore check failed(%s)\n",
+ strerror(errno));
+ return;
+ }
+ if (count > 1)
+ return;
+
+ if (sem_post(&shm->core_died) != 0)
+ RTE_LOG(INFO, EAL,
+ "Failed to increment semaphore (%s)\n",
+ strerror(errno));
+ }
+}
diff --git a/examples/l2fwd-keepalive/shm.h b/examples/l2fwd-keepalive/shm.h
new file mode 100644
index 0000000..25e1b61
--- /dev/null
+++ b/examples/l2fwd-keepalive/shm.h
@@ -0,0 +1,89 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2016 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define RTE_KEEPALIVE_SHM_NAME "/dpdk_keepalive_shm_name"
+
+#define RTE_KEEPALIVE_SHM_ALIVE 1
+#define RTE_KEEPALIVE_SHM_DEAD 2
+
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <semaphore.h>
+#include <rte_keepalive.h>
+
+/**
+ * Keepalive SHM structure.
+ *
+ * The shared memory allocated by the primary is this size, and contains the
+ * information as contained within this struct. A secondary may open the SHM,
+ * and read the contents.
+ */
+struct rte_keepalive_shm {
+ /** IPC semaphore. Posted when a core dies */
+ sem_t core_died;
+
+ /**
+ * Relayed status of each core.
+ */
+ enum rte_keepalive_state core_state[RTE_KEEPALIVE_MAXCORES];
+
+ /**
+ * Last-seen-alive timestamps for the cores
+ */
+ uint64_t core_last_seen_times[RTE_KEEPALIVE_MAXCORES];
+};
+
+/**
+ * Create shared host memory keepalive object.
+ * @return
+ * Pointer to SHM keepalive structure, or NULL on failure.
+ */
+struct rte_keepalive_shm *rte_keepalive_shm_create(void);
+
+/**
+ * Relays state for given core
+ * @param *shm
+ * Pointer to SHM keepalive structure.
+ * @param id_core
+ * Id of core
+ * @param core_state
+ * State of core
+ * @param last_alive
+ * Last seen timestamp for core
+ */
+void rte_keepalive_relayed_state(struct rte_keepalive_shm *shm,
+ const int id_core, const enum rte_keepalive_state core_state,
+ uint64_t last_alive);