service: fix loops to always scan all services

Services can be registered and unregistered, and "holes" can
appear in the contiguous array of services if a service is
unregistered. As a result, we must never iterate to the
number of services (as counted by rte_service_count), instead
scanning the service array and checking if the service is valid.

After this commit, the rte_service_count variable is only used
for its intended purpose; tracking the number of services that
are present.

Fixes: 21698354c832 ("service: introduce service cores concept")

Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Acked-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>

diff --git a/lib/librte_eal/common/rte_service.c b/lib/librte_eal/common/rte_service.c
index b125859..36f9213 100644 (file)
--- a/lib/librte_eal/common/rte_service.c
+++ b/lib/librte_eal/common/rte_service.c
@@ -323,7 +323,10 @@ rte_service_runner_func(void *arg)
 
        while (lcore_states[lcore].runstate == RUNSTATE_RUNNING) {
                const uint64_t service_mask = cs->service_mask;
-               for (i = 0; i < rte_service_count; i++) {
+
+               for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
+                       if (!service_valid(i))
+                               continue;
                        struct rte_service_spec_impl *s = &rte_services[i];
                        if (s->runstate != RUNSTATE_RUNNING ||
                                        !(service_mask & (UINT64_C(1) << i)))
@@ -668,7 +671,8 @@ int32_t rte_service_dump(FILE *f, uint32_t id)
        int print_one = (id != UINT32_MAX);
 
        uint64_t total_cycles = 0;
-       for (i = 0; i < rte_service_count; i++) {
+
+       for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
                if (!service_valid(i))
                        continue;
                total_cycles += rte_services[i].cycles_spent;
@@ -686,7 +690,9 @@ int32_t rte_service_dump(FILE *f, uint32_t id)
 
        /* print all services, as UINT32_MAX was passed as id */
        fprintf(f, "Services Summary\n");
-       for (i = 0; i < rte_service_count; i++) {
+       for (i = 0; i < RTE_SERVICE_NUM_MAX; i++) {
+               if (!service_valid(i))
+                       continue;
                uint32_t reset = 1;
                rte_service_dump_one(f, &rte_services[i], total_cycles, reset);
        }