diff options
Diffstat (limited to 'examples/l2fwd-keepalive/ka-agent/main.c')
| -rw-r--r-- | examples/l2fwd-keepalive/ka-agent/main.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/examples/l2fwd-keepalive/ka-agent/main.c b/examples/l2fwd-keepalive/ka-agent/main.c new file mode 100644 index 00000000..be1c7f49 --- /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; +} |