X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fevent-notifier-error-accounting.c;h=9bc433312ad5209ceacc8c21de73637ada425322;hp=aee82742a80ba9412f641632081fae402b3159b3;hb=761ffce23895ccf66a7a410b9037fa3f128fb20a;hpb=a644d2a417fa064335d05ce70daaa094eea3bc18 diff --git a/src/bin/lttng-sessiond/event-notifier-error-accounting.c b/src/bin/lttng-sessiond/event-notifier-error-accounting.c index aee82742a..9bc433312 100644 --- a/src/bin/lttng-sessiond/event-notifier-error-accounting.c +++ b/src/bin/lttng-sessiond/event-notifier-error-accounting.c @@ -31,7 +31,8 @@ struct index_ht_entry { struct rcu_head rcu_head; }; -struct error_account_entry { +struct ust_error_accounting_entry { + uid_t uid; struct lttng_ht_node_u64 node; struct rcu_head rcu_head; struct ustctl_daemon_counter *daemon_counter; @@ -47,20 +48,24 @@ struct error_account_entry { int nr_counter_cpu_fds; }; -struct kernel_error_account_entry { +struct kernel_error_accounting_entry { int kernel_event_notifier_error_counter_fd; }; -static struct kernel_error_account_entry kernel_error_accountant; - -/* Hashtable mapping event notifier token to index_ht_entry. */ -static struct lttng_ht *error_counter_indexes_ht; +static struct kernel_error_accounting_entry kernel_error_accountant; /* Hashtable mapping uid to error_account_entry. */ static struct lttng_ht *error_counter_uid_ht; -static uint64_t error_counter_size; -static struct lttng_index_allocator *index_allocator; +struct error_accounting_state { + struct lttng_index_allocator *index_allocator; + /* Hashtable mapping event notifier token to index_ht_entry. */ + struct lttng_ht *indices_ht; + uint64_t number_indices; +}; + +static struct error_accounting_state ust_state; +static struct error_accounting_state kernel_state; static inline void get_trigger_info_for_log(const struct lttng_trigger *trigger, const char **trigger_name, @@ -106,24 +111,73 @@ const char *error_accounting_status_str( } } +static enum event_notifier_error_accounting_status -event_notifier_error_accounting_init(uint64_t nb_bucket) +init_error_accounting_state(struct error_accounting_state *state, + uint64_t index_count) { enum event_notifier_error_accounting_status status; - index_allocator = lttng_index_allocator_create(nb_bucket); - if (!index_allocator) { - ERR("Failed to allocate event notifier error counter index"); + assert(state); + + state->number_indices = index_count; + + state->index_allocator = lttng_index_allocator_create(index_count); + if (!state->index_allocator) { + ERR("Failed to allocate event notifier error counter index allocator"); status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; - goto error_index_allocator; + goto end; } - error_counter_indexes_ht = lttng_ht_new( - ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, LTTNG_HT_TYPE_U64); - if (!error_counter_indexes_ht) { + state->indices_ht = lttng_ht_new(ERROR_COUNTER_INDEX_HT_INITIAL_SIZE, + LTTNG_HT_TYPE_U64); + if (!state->indices_ht) { ERR("Failed to allocate error counter indices hash table"); status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; - goto error_index_allocator; + goto error_indices_ht; + } + + status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; + goto end; + +error_indices_ht: + lttng_index_allocator_destroy(state->index_allocator); + state->index_allocator = NULL; +end: + return status; +} + +static +void fini_error_accounting_state(struct error_accounting_state *state) +{ + assert(state); + + /* + * Will assert if some error counter indices were not released (an + * internal error). + */ + lttng_ht_destroy(state->indices_ht); + lttng_index_allocator_destroy(state->index_allocator); +} + +enum event_notifier_error_accounting_status +event_notifier_error_accounting_init(uint64_t buffer_size_kernel, + uint64_t buffer_size_ust) +{ + enum event_notifier_error_accounting_status status; + + status = init_error_accounting_state(&kernel_state, buffer_size_kernel); + if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { + ERR("Failed to initialize kernel event notifier accounting state: status = %s", + error_accounting_status_str(status)); + goto end; + } + + status = init_error_accounting_state(&ust_state, buffer_size_ust); + if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { + ERR("Failed to initialize UST event notifier accounting state: status = %s", + error_accounting_status_str(status)); + goto error_ust_state; } error_counter_uid_ht = lttng_ht_new( @@ -131,20 +185,24 @@ event_notifier_error_accounting_init(uint64_t nb_bucket) if (!error_counter_uid_ht) { ERR("Failed to allocate UID to error counter accountant hash table"); status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NOMEM; - goto error_index_allocator; + goto error_uid_ht; } - error_counter_size = nb_bucket; - status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; + goto end; -error_index_allocator: +error_uid_ht: + fini_error_accounting_state(&ust_state); +error_ust_state: + fini_error_accounting_state(&kernel_state); +end: return status; } static enum event_notifier_error_accounting_status get_error_counter_index_for_token( - uint64_t tracer_token, uint64_t *error_counter_index) + struct error_accounting_state *state, uint64_t tracer_token, + uint64_t *error_counter_index) { struct lttng_ht_node_u64 *node; struct lttng_ht_iter iter; @@ -152,7 +210,7 @@ enum event_notifier_error_accounting_status get_error_counter_index_for_token( enum event_notifier_error_accounting_status status; rcu_read_lock(); - lttng_ht_lookup(error_counter_indexes_ht, &tracer_token, &iter); + lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); node = lttng_ht_iter_get_node_u64(&iter); if (node) { index_entry = caa_container_of( @@ -169,9 +227,9 @@ enum event_notifier_error_accounting_status get_error_counter_index_for_token( #ifdef HAVE_LIBLTTNG_UST_CTL static -struct error_account_entry *get_uid_accounting_entry(const struct ust_app *app) +struct ust_error_accounting_entry *get_uid_accounting_entry(const struct ust_app *app) { - struct error_account_entry *entry; + struct ust_error_accounting_entry *entry; struct lttng_ht_node_u64 *node; struct lttng_ht_iter iter; uint64_t key = app->uid; @@ -181,34 +239,36 @@ struct error_account_entry *get_uid_accounting_entry(const struct ust_app *app) if(node == NULL) { entry = NULL; } else { - entry = caa_container_of(node, struct error_account_entry, node); + entry = caa_container_of(node, struct ust_error_accounting_entry, node); } return entry; } static -struct error_account_entry *create_uid_accounting_entry( +struct ust_error_accounting_entry *create_uid_accounting_entry( const struct ust_app *app) { int i, ret; struct ustctl_daemon_counter *daemon_counter; struct lttng_ust_abi_object_data *counter, **cpu_counters; int *cpu_counter_fds = NULL; - struct error_account_entry *entry = NULL; + struct ust_error_accounting_entry *entry = NULL; const struct ustctl_counter_dimension dimension = { - .size = error_counter_size, + .size = ust_state.number_indices, .has_underflow = false, .has_overflow = false, }; - entry = zmalloc(sizeof(struct error_account_entry)); + entry = zmalloc(sizeof(struct ust_error_accounting_entry)); if (!entry) { PERROR("Failed to allocate event notifier error acounting entry") goto error; } + entry->uid = app->uid; entry->nr_counter_cpu_fds = ustctl_get_nr_cpu_per_counter(); + cpu_counter_fds = zmalloc(entry->nr_counter_cpu_fds * sizeof(*cpu_counter_fds)); if (!cpu_counter_fds) { PERROR("Failed to allocate event notifier error counter file descriptors array: application uid = %d, application name = '%s', pid = %d, allocation size = %zu", @@ -401,7 +461,7 @@ event_notifier_error_accounting_register_app(struct ust_app *app) int ret; uint64_t i; struct lttng_ust_abi_object_data *new_counter; - struct error_account_entry *entry; + struct ust_error_accounting_entry *entry; enum event_notifier_error_accounting_status status; struct lttng_ust_abi_object_data **cpu_counters; @@ -512,7 +572,7 @@ enum event_notifier_error_accounting_status event_notifier_error_accounting_unregister_app(struct ust_app *app) { enum event_notifier_error_accounting_status status; - struct error_account_entry *entry; + struct ust_error_accounting_entry *entry; int i; rcu_read_lock(); @@ -547,29 +607,30 @@ event_notifier_error_accounting_ust_get_count( const struct lttng_trigger *trigger, uint64_t *count) { struct lttng_ht_iter iter; - struct error_account_entry *uid_entry; + struct ust_error_accounting_entry *uid_entry; uint64_t error_counter_index, global_sum = 0; enum event_notifier_error_accounting_status status; size_t dimension_indexes[1]; const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); + uid_t trigger_owner_uid; + const char *trigger_name; - /* - * Go over all error counters (ignoring uid) as a trigger (and trigger - * errors) can be generated from any applications that this session - * daemon is managing. - */ rcu_read_lock(); + get_trigger_info_for_log(trigger, &trigger_name, &trigger_owner_uid); + + /* + * At the moment, the error counter index is domain wide. This means + * that if UID 1000 registers a event notifier and is allocated index 0 + * in it's error counter, index zero will be unused in error counter of + * all other users. + */ status = get_error_counter_index_for_token( + &ust_state, tracer_token, &error_counter_index); if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { - uid_t trigger_owner_uid; - const char *trigger_name; - - get_trigger_info_for_log(trigger, &trigger_name, - &trigger_owner_uid); ERR("Failed to retrieve index for tracer token: token = %" PRIu64 ", trigger name = '%s', trigger owner uid = %d, status = %s", tracer_token, trigger_name, @@ -580,6 +641,13 @@ event_notifier_error_accounting_ust_get_count( dimension_indexes[0] = error_counter_index; + /* + * Iterate over all the UID entries. + * We aggregate the value of all uid entries regardless of if the uid + * matches the trigger's uid because a user that is allowed to register + * a trigger to a given sessiond is also allowed to create an event + * notifier on all apps that this sessiond is aware of. + */ cds_lfht_for_each_entry(error_counter_uid_ht->ht, &iter.iter, uid_entry, node.node) { int ret; @@ -590,12 +658,6 @@ event_notifier_error_accounting_ust_get_count( dimension_indexes, &local_value, &overflow, &underflow); if (ret || local_value < 0) { - uid_t trigger_owner_uid; - const char *trigger_name; - - get_trigger_info_for_log(trigger, &trigger_name, - &trigger_owner_uid); - if (ret) { ERR("Failed to aggregate event notifier error counter values of trigger: trigger name = '%s', trigger owner uid = %d", trigger_name, @@ -615,7 +677,6 @@ event_notifier_error_accounting_ust_get_count( /* Cast is safe as negative values are checked-for above. */ global_sum += (uint64_t) local_value; - } *count = global_sum; @@ -631,7 +692,7 @@ enum event_notifier_error_accounting_status event_notifier_error_accounting_ust_ const struct lttng_trigger *trigger) { struct lttng_ht_iter iter; - struct error_account_entry *uid_entry; + struct ust_error_accounting_entry *uid_entry; uint64_t error_counter_index; enum event_notifier_error_accounting_status status; size_t dimension_index; @@ -645,6 +706,7 @@ enum event_notifier_error_accounting_status event_notifier_error_accounting_ust_ rcu_read_lock(); status = get_error_counter_index_for_token( + &ust_state, tracer_token, &error_counter_index); if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { @@ -700,6 +762,7 @@ event_notifier_error_accounting_kernel_clear( struct lttng_kernel_counter_clear counter_clear = {}; status = get_error_counter_index_for_token( + &kernel_state, lttng_trigger_get_tracer_token(trigger), &error_counter_index); if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { @@ -752,7 +815,7 @@ event_notifier_error_accounting_register_kernel( LTTNG_KERNEL_COUNTER_BITNESS_64, .global_sum_step = 0, .number_dimensions = 1, - .dimensions[0].size = error_counter_size, + .dimensions[0].size = kernel_state.number_indices, .dimensions[0].has_underflow = false, .dimensions[0].has_overflow = false, }; @@ -790,22 +853,25 @@ error: static enum event_notifier_error_accounting_status create_error_counter_index_for_token( - uint64_t tracer_token, uint64_t *error_counter_index) + struct error_accounting_state *state, uint64_t tracer_token, + uint64_t *error_counter_index) { struct index_ht_entry *index_entry; enum lttng_index_allocator_status index_alloc_status; uint64_t local_error_counter_index; enum event_notifier_error_accounting_status status; + assert(state); + /* Allocate a new index for that counter. */ - index_alloc_status = lttng_index_allocator_alloc(index_allocator, + index_alloc_status = lttng_index_allocator_alloc(state->index_allocator, &local_error_counter_index); switch (index_alloc_status) { case LTTNG_INDEX_ALLOCATOR_STATUS_EMPTY: DBG("No indices left in the configured event notifier error counter: " "number-of-indices = %"PRIu64, lttng_index_allocator_get_index_count( - index_allocator)); + state->index_allocator)); status = EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_NO_INDEX_AVAILABLE; goto end; case LTTNG_INDEX_ALLOCATOR_STATUS_OK: @@ -824,7 +890,7 @@ enum event_notifier_error_accounting_status create_error_counter_index_for_token index_entry->error_counter_index = local_error_counter_index; lttng_ht_node_init_u64(&index_entry->node, tracer_token); - lttng_ht_add_unique_u64(error_counter_indexes_ht, &index_entry->node); + lttng_ht_add_unique_u64(state->indices_ht, &index_entry->node); DBG("Allocated error counter index for tracer token: tracer token = %" PRIu64 ", index = %" PRIu64, tracer_token, local_error_counter_index); @@ -841,12 +907,24 @@ event_notifier_error_accounting_register_event_notifier( { enum event_notifier_error_accounting_status status; uint64_t local_error_counter_index; + struct error_accounting_state *state; + + switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { + case LTTNG_DOMAIN_KERNEL: + state = &kernel_state; + break; + case LTTNG_DOMAIN_UST: + state = &ust_state; + break; + default: + abort(); + } /* * Check if this event notifier already has a error counter index * assigned. */ - status = get_error_counter_index_for_token( + status = get_error_counter_index_for_token(state, lttng_trigger_get_tracer_token(trigger), &local_error_counter_index); switch (status) { @@ -862,7 +940,7 @@ event_notifier_error_accounting_register_event_notifier( trigger_name, trigger_owner_uid, lttng_trigger_get_tracer_token(trigger)); - status = create_error_counter_index_for_token( + status = create_error_counter_index_for_token(state, lttng_trigger_get_tracer_token(trigger), &local_error_counter_index); if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { @@ -896,7 +974,9 @@ event_notifier_error_accounting_kernel_get_count( int ret; status = get_error_counter_index_for_token( - lttng_trigger_get_tracer_token(trigger), &error_counter_index); + &kernel_state, + lttng_trigger_get_tracer_token(trigger), + &error_counter_index); if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { ERR("Error getting index for token: status=%s", error_accounting_status_str(status)); @@ -951,7 +1031,8 @@ event_notifier_error_accounting_get_count( trigger, count); case LTTNG_DOMAIN_UST: #ifdef HAVE_LIBLTTNG_UST_CTL - return event_notifier_error_accounting_ust_get_count(trigger, count); + return event_notifier_error_accounting_ust_get_count(trigger, + count); #else return EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK; #endif /* HAVE_LIBLTTNG_UST_CTL */ @@ -993,6 +1074,7 @@ void event_notifier_error_accounting_unregister_event_notifier( struct lttng_ht_node_u64 *node; const uint64_t tracer_token = lttng_trigger_get_tracer_token(trigger); enum event_notifier_error_accounting_status status; + struct error_accounting_state *state; status = event_notifier_error_accounting_clear(trigger); if (status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { @@ -1001,8 +1083,19 @@ void event_notifier_error_accounting_unregister_event_notifier( error_accounting_status_str(status)); } + switch (lttng_trigger_get_underlying_domain_type_restriction(trigger)) { + case LTTNG_DOMAIN_KERNEL: + state = &kernel_state; + break; + case LTTNG_DOMAIN_UST: + state = &ust_state; + break; + default: + abort(); + } + rcu_read_lock(); - lttng_ht_lookup(error_counter_indexes_ht, &tracer_token, &iter); + lttng_ht_lookup(state->indices_ht, &tracer_token, &iter); node = lttng_ht_iter_get_node_u64(&iter); if (node) { int del_ret; @@ -1011,7 +1104,7 @@ void event_notifier_error_accounting_unregister_event_notifier( enum lttng_index_allocator_status index_alloc_status; index_alloc_status = lttng_index_allocator_release( - index_allocator, + state->index_allocator, index_entry->error_counter_index); if (index_alloc_status != LTTNG_INDEX_ALLOCATOR_STATUS_OK) { uid_t trigger_owner_uid; @@ -1026,7 +1119,7 @@ void event_notifier_error_accounting_unregister_event_notifier( /* Don't exit, perform the rest of the clean-up. */ } - del_ret = lttng_ht_del(error_counter_indexes_ht, &iter); + del_ret = lttng_ht_del(state->indices_ht, &iter); assert(!del_ret); call_rcu(&index_entry->rcu_head, free_index_ht_entry); } @@ -1038,7 +1131,7 @@ void event_notifier_error_accounting_unregister_event_notifier( static void free_error_account_entry(struct rcu_head *head) { int i; - struct error_account_entry *entry = + struct ust_error_accounting_entry *entry = caa_container_of(head, typeof(*entry), rcu_head); for (i = 0; i < entry->nr_counter_cpu_fds; i++) { @@ -1063,9 +1156,7 @@ static void free_error_account_entry(struct rcu_head *head) {} void event_notifier_error_accounting_fini(void) { struct lttng_ht_iter iter; - struct error_account_entry *uid_entry; - - lttng_index_allocator_destroy(index_allocator); + struct ust_error_accounting_entry *uid_entry; if (kernel_error_accountant.kernel_event_notifier_error_counter_fd) { const int ret = close(kernel_error_accountant.kernel_event_notifier_error_counter_fd); @@ -1087,11 +1178,9 @@ void event_notifier_error_accounting_fini(void) call_rcu(&uid_entry->rcu_head, free_error_account_entry); } rcu_read_unlock(); + lttng_ht_destroy(error_counter_uid_ht); - /* - * Will assert if some error counter indices were not released (an - * internal error). - */ - lttng_ht_destroy(error_counter_indexes_ht); + fini_error_accounting_state(&kernel_state); + fini_error_accounting_state(&ust_state); }