X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fcmd.c;h=4b7ef62b600b3cc41f8d47f040b1f949b7b6b093;hb=52a3011a96d63b7b75e1e643e000b55afa883447;hp=d1bf6f0c034d7a96e266c06fc6dbf6c9925e4fbc;hpb=85de7d7b89c4e5227d63dd88323ef1acc1abecf8;p=lttng-tools.git diff --git a/src/bin/lttng-sessiond/cmd.c b/src/bin/lttng-sessiond/cmd.c index d1bf6f0c0..4b7ef62b6 100644 --- a/src/bin/lttng-sessiond/cmd.c +++ b/src/bin/lttng-sessiond/cmd.c @@ -1303,6 +1303,7 @@ error: /* * Command LTTNG_ENABLE_EVENT processed by the client thread. + * We own filter, exclusion, and filter_expression. */ int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, char *channel_name, struct lttng_event *event, @@ -1424,6 +1425,10 @@ int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, /* At this point, the session and channel exist on the tracer */ ret = event_ust_enable_tracepoint(usess, uchan, event, filter_expression, filter, exclusion); + /* We have passed ownership */ + filter_expression = NULL; + filter = NULL; + exclusion = NULL; if (ret != LTTNG_OK) { goto error; } @@ -1460,15 +1465,18 @@ int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, ret = cmd_enable_event(session, &tmp_dom, DEFAULT_JUL_CHANNEL_NAME, &uevent, filter_expression, filter, NULL, wpipe); + /* We have passed ownership */ + filter_expression = NULL; + filter = NULL; if (ret != LTTNG_OK && ret != LTTNG_ERR_UST_EVENT_ENABLED) { goto error; } /* The wild card * means that everything should be enabled. */ if (strncmp(event->name, "*", 1) == 0 && strlen(event->name) == 1) { - ret = event_jul_enable_all(usess, event); + ret = event_jul_enable_all(usess, event, filter); } else { - ret = event_jul_enable(usess, event); + ret = event_jul_enable(usess, event, filter); } if (ret != LTTNG_OK) { goto error; @@ -1489,6 +1497,9 @@ int cmd_enable_event(struct ltt_session *session, struct lttng_domain *domain, ret = LTTNG_OK; error: + free(filter_expression); + free(filter); + free(exclusion); rcu_read_unlock(); return ret; } @@ -1689,7 +1700,7 @@ int cmd_enable_event_all(struct ltt_session *session, strncpy(event.name, "*", sizeof(event.name)); event.name[sizeof(event.name) - 1] = '\0'; - ret = event_jul_enable_all(usess, &event); + ret = event_jul_enable_all(usess, &event, filter); if (ret != LTTNG_OK) { goto error; } @@ -1813,7 +1824,9 @@ int cmd_start_trace(struct ltt_session *session) * possible to enable channel thus inform the client. */ if (usess && usess->domain_global.channels) { + rcu_read_lock(); nb_chan += lttng_ht_get_count(usess->domain_global.channels); + rcu_read_unlock(); } if (ksession) { nb_chan += ksession->channel_count; @@ -2400,16 +2413,18 @@ ssize_t cmd_list_channels(int domain, struct ltt_session *session, break; case LTTNG_DOMAIN_UST: if (session->ust_session != NULL) { + rcu_read_lock(); nb_chan = lttng_ht_get_count( - session->ust_session->domain_global.channels); + session->ust_session->domain_global.channels); + rcu_read_unlock(); } DBG3("Number of UST global channels %zd", nb_chan); - if (nb_chan <= 0) { + if (nb_chan < 0) { ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; + goto error; } break; default: - *channels = NULL; ret = LTTNG_ERR_UND; goto error; } @@ -2422,10 +2437,6 @@ ssize_t cmd_list_channels(int domain, struct ltt_session *session, } list_lttng_channels(domain, session, *channels); - } else { - *channels = NULL; - /* Ret value was set in the domain switch case */ - goto error; } return nb_chan; @@ -2711,7 +2722,7 @@ ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, struct lttng_snapshot_output **outputs) { int ret, idx = 0; - struct lttng_snapshot_output *list; + struct lttng_snapshot_output *list = NULL; struct lttng_ht_iter iter; struct snapshot_output *output; @@ -2725,7 +2736,7 @@ ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, * set in no output mode. */ if (session->output_traces) { - ret = LTTNG_ERR_EPERM; + ret = -LTTNG_ERR_EPERM; goto error; } @@ -2736,11 +2747,12 @@ ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, list = zmalloc(session->snapshot.nb_output * sizeof(*list)); if (!list) { - ret = LTTNG_ERR_NOMEM; + ret = -LTTNG_ERR_NOMEM; goto error; } /* Copy list from session to the new list object. */ + rcu_read_lock(); cds_lfht_for_each_entry(session->snapshot.output_ht->ht, &iter.iter, output, node.node) { assert(output->consumer); @@ -2755,28 +2767,28 @@ ssize_t cmd_snapshot_list_outputs(struct ltt_session *session, ret = uri_to_str_url(&output->consumer->dst.net.control, list[idx].ctrl_url, sizeof(list[idx].ctrl_url)); if (ret < 0) { - ret = LTTNG_ERR_NOMEM; - goto free_error; + ret = -LTTNG_ERR_NOMEM; + goto error; } /* Data URI. */ ret = uri_to_str_url(&output->consumer->dst.net.data, list[idx].data_url, sizeof(list[idx].data_url)); if (ret < 0) { - ret = LTTNG_ERR_NOMEM; - goto free_error; + ret = -LTTNG_ERR_NOMEM; + goto error; } } idx++; } *outputs = list; - return session->snapshot.nb_output; - -free_error: - free(list); + list = NULL; + ret = session->snapshot.nb_output; error: - return -ret; + free(list); + rcu_read_unlock(); + return ret; } /* @@ -2832,7 +2844,7 @@ error: */ static int record_kernel_snapshot(struct ltt_kernel_session *ksess, struct snapshot_output *output, struct ltt_session *session, - int wait, int nb_streams) + int wait, uint64_t max_stream_size) { int ret; @@ -2863,7 +2875,7 @@ static int record_kernel_snapshot(struct ltt_kernel_session *ksess, goto error_snapshot; } - ret = kernel_snapshot_record(ksess, output, wait, nb_streams); + ret = kernel_snapshot_record(ksess, output, wait, max_stream_size); if (ret != LTTNG_OK) { goto error_snapshot; } @@ -2884,7 +2896,7 @@ error: */ static int record_ust_snapshot(struct ltt_ust_session *usess, struct snapshot_output *output, struct ltt_session *session, - int wait, int nb_streams) + int wait, uint64_t max_stream_size) { int ret; @@ -2915,7 +2927,7 @@ static int record_ust_snapshot(struct ltt_ust_session *usess, goto error_snapshot; } - ret = ust_app_snapshot_record(usess, output, wait, nb_streams); + ret = ust_app_snapshot_record(usess, output, wait, max_stream_size); if (ret < 0) { switch (-ret) { case EINVAL: @@ -2940,11 +2952,53 @@ error: return ret; } +/* + * Return the biggest subbuffer size of all channels in the given session. + */ +static uint64_t get_session_max_subbuf_size(struct ltt_session *session) +{ + uint64_t max_size = 0; + + assert(session); + + if (session->kernel_session) { + struct ltt_kernel_channel *chan; + struct ltt_kernel_session *ksess = session->kernel_session; + + /* + * For each channel, add to the max size the size of each subbuffer + * multiplied by their sized. + */ + cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { + if (chan->channel->attr.subbuf_size > max_size) { + max_size = chan->channel->attr.subbuf_size; + } + } + } + + if (session->ust_session) { + struct lttng_ht_iter iter; + struct ltt_ust_channel *uchan; + struct ltt_ust_session *usess = session->ust_session; + + rcu_read_lock(); + cds_lfht_for_each_entry(usess->domain_global.channels->ht, &iter.iter, + uchan, node.node) { + if (uchan->attr.subbuf_size > max_size) { + max_size = uchan->attr.subbuf_size; + } + } + rcu_read_unlock(); + } + + return max_size; +} + /* * Returns the total number of streams for a session or a negative value * on error. */ -static unsigned int get_total_nb_stream(struct ltt_session *session) +static unsigned int get_session_nb_streams(struct ltt_session *session) { unsigned int total_streams = 0; @@ -2978,6 +3032,7 @@ int cmd_snapshot_record(struct ltt_session *session, unsigned int use_tmp_output = 0; struct snapshot_output tmp_output; unsigned int nb_streams, snapshot_success = 0; + uint64_t session_max_size = 0, max_stream_size = 0; assert(session); @@ -3017,17 +3072,43 @@ int cmd_snapshot_record(struct ltt_session *session, } /* - * Get the total number of stream of that session which is used by the - * maximum size of the snapshot feature. + * Get the session maximum size for a snapshot meaning it will compute the + * size of all streams from all domain. + */ + max_stream_size = get_session_max_subbuf_size(session); + + nb_streams = get_session_nb_streams(session); + if (nb_streams) { + /* + * The maximum size of the snapshot is the number of streams multiplied + * by the biggest subbuf size of all channels in a session which is the + * maximum stream size available for each stream. The session max size + * is now checked against the snapshot max size value given by the user + * and if lower, an error is returned. + */ + session_max_size = max_stream_size * nb_streams; + } + + DBG3("Snapshot max size is %" PRIu64 " for max stream size of %" PRIu64, + session_max_size, max_stream_size); + + /* + * If we use a temporary output, check right away if the max size fits else + * for each output the max size will be checked. */ - nb_streams = get_total_nb_stream(session); + if (use_tmp_output && + (tmp_output.max_size != 0 && + tmp_output.max_size < session_max_size)) { + ret = LTTNG_ERR_MAX_SIZE_INVALID; + goto error; + } if (session->kernel_session) { struct ltt_kernel_session *ksess = session->kernel_session; if (use_tmp_output) { ret = record_kernel_snapshot(ksess, &tmp_output, session, - wait, nb_streams); + wait, max_stream_size); if (ret != LTTNG_OK) { goto error; } @@ -3051,6 +3132,13 @@ int cmd_snapshot_record(struct ltt_session *session, tmp_output.max_size = output->max_size; } + if (tmp_output.max_size != 0 && + tmp_output.max_size < session_max_size) { + rcu_read_unlock(); + ret = LTTNG_ERR_MAX_SIZE_INVALID; + goto error; + } + /* Use temporary name. */ if (*output->name != '\0') { strncpy(tmp_output.name, output->name, @@ -3060,7 +3148,7 @@ int cmd_snapshot_record(struct ltt_session *session, tmp_output.nb_snapshot = session->snapshot.nb_snapshot; ret = record_kernel_snapshot(ksess, &tmp_output, - session, wait, nb_streams); + session, wait, max_stream_size); if (ret != LTTNG_OK) { rcu_read_unlock(); goto error; @@ -3076,7 +3164,7 @@ int cmd_snapshot_record(struct ltt_session *session, if (use_tmp_output) { ret = record_ust_snapshot(usess, &tmp_output, session, - wait, nb_streams); + wait, max_stream_size); if (ret != LTTNG_OK) { goto error; } @@ -3100,6 +3188,13 @@ int cmd_snapshot_record(struct ltt_session *session, tmp_output.max_size = output->max_size; } + if (tmp_output.max_size != 0 && + tmp_output.max_size < session_max_size) { + rcu_read_unlock(); + ret = LTTNG_ERR_MAX_SIZE_INVALID; + goto error; + } + /* Use temporary name. */ if (*output->name != '\0') { strncpy(tmp_output.name, output->name, @@ -3109,7 +3204,7 @@ int cmd_snapshot_record(struct ltt_session *session, tmp_output.nb_snapshot = session->snapshot.nb_snapshot; ret = record_ust_snapshot(usess, &tmp_output, session, - wait, nb_streams); + wait, max_stream_size); if (ret != LTTNG_OK) { rcu_read_unlock(); goto error;