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core locks: add error checking to unclaiming

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Add error check to unclaim mechanism. Issue #2920
showed that unclaiming CPU locks might fail and
we should catch errors to determine the cause.

Change-Id: Ifdfb7db2595d73f8bae13418ef145ad80e1d07ef
Signed-off-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/16958
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
This commit is contained in:
Krzysztof Karas 2023-02-27 11:38:58 +01:00 committed by Tomasz Zawadzki
parent 609f8d4379
commit b9298bf908
1 changed files with 36 additions and 7 deletions
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43
lib/event/app.c
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@ -530,20 +530,39 @@ app_copy_opts(struct spdk_app_opts *opts, struct spdk_app_opts *opts_user, size_
#undef SET_FIELD
}
static void
unclaim_cpu_cores(void)
static int
unclaim_cpu_cores(uint32_t *failed_core)
{
char core_name[40];
uint32_t i;
int rc;
for (i = 0; i < MAX_CPU_CORES; i++) {
if (g_core_locks[i] != -1) {
snprintf(core_name, sizeof(core_name), "/var/tmp/spdk_cpu_lock_%03d", i);
close(g_core_locks[i]);
rc = close(g_core_locks[i]);
if (rc) {
SPDK_ERRLOG("Failed to close lock fd for core %d, errno: %d\n", i, errno);
goto error;
}
g_core_locks[i] = -1;
unlink(core_name);
rc = unlink(core_name);
if (rc) {
SPDK_ERRLOG("Failed to unlink lock fd for core %d, errno: %d\n", i, errno);
goto error;
}
}
}
return 0;
error:
if (failed_core != NULL) {
/* Set number of core we failed to claim. */
*failed_core = i;
}
return -1;
}
static int
@ -612,7 +631,7 @@ error:
/* Set number of core we failed to claim. */
*failed_core = core;
}
unclaim_cpu_cores();
unclaim_cpu_cores(NULL);
return -1;
}
@ -763,7 +782,7 @@ spdk_app_fini(void)
spdk_reactors_fini();
spdk_env_fini();
spdk_log_close();
unclaim_cpu_cores();
unclaim_cpu_cores(NULL);
}
static void
@ -1274,6 +1293,10 @@ static void
rpc_framework_disable_cpumask_locks(struct spdk_jsonrpc_request *request,
const struct spdk_json_val *params)
{
char msg[128];
int rc;
uint32_t failed_core;
if (params != NULL) {
spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
"framework_disable_cpumask_locks"
@ -1281,7 +1304,13 @@ rpc_framework_disable_cpumask_locks(struct spdk_jsonrpc_request *request,
return;
}
unclaim_cpu_cores();
rc = unclaim_cpu_cores(&failed_core);
if (rc) {
snprintf(msg, sizeof(msg), "Failed to unclaim CPU core: %" PRIu32, failed_core);
spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INTERNAL_ERROR, msg);
return;
}
spdk_jsonrpc_send_bool_response(request, true);
}
SPDK_RPC_REGISTER("framework_disable_cpumask_locks", rpc_framework_disable_cpumask_locks,