1 files changed, 112 insertions, 0 deletions
diff --git a/src/spdk/dpdk/examples/l2fwd-keepalive/shm.c b/src/spdk/dpdk/examples/l2fwd-keepalive/shm.c
new file mode 100644
index 00000000..7c7a9ea8
--- /dev/null
+++ b/src/spdk/dpdk/examples/l2fwd-keepalive/shm.c
@@ -0,0 +1,112 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2016 Intel Corporation
+ */
+
+#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));
+				munmap(ka_shm,
+					sizeof(struct rte_keepalive_shm));
+				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));
+	}
+}
+
+void rte_keepalive_shm_cleanup(struct rte_keepalive_shm *ka_shm)
+{
+	if (shm_unlink(RTE_KEEPALIVE_SHM_NAME) == -1 && errno != ENOENT)
+		printf("Warning: Error unlinking  %s (%s)\n",
+			RTE_KEEPALIVE_SHM_NAME, strerror(errno));
+
+	if (ka_shm && munmap(ka_shm, sizeof(struct rte_keepalive_shm)) != 0)
+		printf("Warning: munmap() failed\n");
+}