X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fkernel.c;h=c395f425542abe4bffe9f6ecfcf28a6f97e67be0;hp=f5979c9b4f2cf26028c8d4f6f120349b9a0eed9c;hb=d295668767ac8234e83984e1812d342d03293d88;hpb=dcabc1905756b2999886313ec33705f7571a3fb9 diff --git a/src/bin/lttng-sessiond/kernel.c b/src/bin/lttng-sessiond/kernel.c index f5979c9b4..c395f4255 100644 --- a/src/bin/lttng-sessiond/kernel.c +++ b/src/bin/lttng-sessiond/kernel.c @@ -24,6 +24,7 @@ #include #include +#include #include #include #include @@ -203,16 +204,15 @@ error: */ static int extract_userspace_probe_offset_function_elf( - struct lttng_userspace_probe_location *probe_location, + const struct lttng_userspace_probe_location *probe_location, struct ltt_kernel_session *session, uint64_t *offset) { int fd; int ret = 0; const char *symbol = NULL; - struct lttng_userspace_probe_location_lookup_method *lookup = NULL; + const struct lttng_userspace_probe_location_lookup_method *lookup = NULL; enum lttng_userspace_probe_location_lookup_method_type lookup_method_type; - assert(lttng_userspace_probe_location_get_type(probe_location) == LTTNG_USERSPACE_PROBE_LOCATION_TYPE_FUNCTION); @@ -266,12 +266,12 @@ end: */ static int extract_userspace_probe_offset_tracepoint_sdt( - struct lttng_userspace_probe_location *probe_location, + const struct lttng_userspace_probe_location *probe_location, struct ltt_kernel_session *session, uint64_t **offsets, uint32_t *offsets_count) { enum lttng_userspace_probe_location_lookup_method_type lookup_method_type; - struct lttng_userspace_probe_location_lookup_method *lookup = NULL; + const struct lttng_userspace_probe_location_lookup_method *lookup = NULL; const char *probe_name = NULL, *provider_name = NULL; int ret = 0; int fd, i; @@ -342,9 +342,9 @@ static int userspace_probe_add_callsites(struct lttng_event *ev, struct ltt_kernel_session *session, int fd) { - struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; + const struct lttng_userspace_probe_location_lookup_method *lookup_method = NULL; enum lttng_userspace_probe_location_lookup_method_type type; - struct lttng_userspace_probe_location *location = NULL; + const struct lttng_userspace_probe_location *location = NULL; int ret; assert(ev); @@ -1160,12 +1160,15 @@ end_boot_id: */ void kernel_destroy_session(struct ltt_kernel_session *ksess) { + struct lttng_trace_chunk *trace_chunk; + if (ksess == NULL) { DBG3("No kernel session when tearing down session"); return; } DBG("Tearing down kernel session"); + trace_chunk = ksess->current_trace_chunk; /* * Destroy channels on the consumer if at least one FD has been sent and we @@ -1199,6 +1202,7 @@ void kernel_destroy_session(struct ltt_kernel_session *ksess) consumer_output_send_destroy_relayd(ksess->consumer); trace_kernel_destroy_session(ksess); + lttng_trace_chunk_put(trace_chunk); } /* @@ -1234,18 +1238,18 @@ void kernel_destroy_channel(struct ltt_kernel_channel *kchan) /* * Take a snapshot for a given kernel session. * - * Return 0 on success or else return a LTTNG_ERR code. + * Return LTTNG_OK on success or else return a LTTNG_ERR code. */ -int kernel_snapshot_record(struct ltt_kernel_session *ksess, - struct snapshot_output *output, int wait, +enum lttng_error_code kernel_snapshot_record( + struct ltt_kernel_session *ksess, + const struct snapshot_output *output, int wait, uint64_t nb_packets_per_stream) { int err, ret, saved_metadata_fd; + enum lttng_error_code status = LTTNG_OK; struct consumer_socket *socket; struct lttng_ht_iter iter; struct ltt_kernel_metadata *saved_metadata; - struct ltt_session *session; - uint64_t trace_archive_id; assert(ksess); assert(ksess->consumer); @@ -1253,12 +1257,6 @@ int kernel_snapshot_record(struct ltt_kernel_session *ksess, DBG("Kernel snapshot record started"); - session = session_find_by_id(ksess->id); - assert(session); - assert(pthread_mutex_trylock(&session->lock)); - assert(session_trylock_list()); - trace_archive_id = session->current_archive_id; - /* Save current metadata since the following calls will change it. */ saved_metadata = ksess->metadata; saved_metadata_fd = ksess->metadata_stream_fd; @@ -1267,13 +1265,13 @@ int kernel_snapshot_record(struct ltt_kernel_session *ksess, ret = kernel_open_metadata(ksess); if (ret < 0) { - ret = LTTNG_ERR_KERN_META_FAIL; + status = LTTNG_ERR_KERN_META_FAIL; goto error; } ret = kernel_open_metadata_stream(ksess); if (ret < 0) { - ret = LTTNG_ERR_KERN_META_FAIL; + status = LTTNG_ERR_KERN_META_FAIL; goto error_open_stream; } @@ -1297,19 +1295,17 @@ int kernel_snapshot_record(struct ltt_kernel_session *ksess, /* Put back the saved consumer output into the session. */ ksess->consumer = saved_output; if (ret < 0) { - ret = LTTNG_ERR_KERN_CONSUMER_FAIL; + status = LTTNG_ERR_KERN_META_FAIL; goto error_consumer; } /* For each channel, ask the consumer to snapshot it. */ cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { - ret = consumer_snapshot_channel(socket, chan->key, output, 0, + status = consumer_snapshot_channel(socket, chan->key, output, 0, ksess->uid, ksess->gid, DEFAULT_KERNEL_TRACE_DIR, wait, - nb_packets_per_stream, - trace_archive_id); - if (ret < 0) { - ret = LTTNG_ERR_KERN_CONSUMER_FAIL; + nb_packets_per_stream); + if (status != LTTNG_OK) { (void) kernel_consumer_destroy_metadata(socket, ksess->metadata); goto error_consumer; @@ -1317,12 +1313,10 @@ int kernel_snapshot_record(struct ltt_kernel_session *ksess, } /* Snapshot metadata, */ - ret = consumer_snapshot_channel(socket, ksess->metadata->key, output, + status = consumer_snapshot_channel(socket, ksess->metadata->key, output, 1, ksess->uid, ksess->gid, - DEFAULT_KERNEL_TRACE_DIR, wait, 0, - trace_archive_id); - if (ret < 0) { - ret = LTTNG_ERR_KERN_CONSUMER_FAIL; + DEFAULT_KERNEL_TRACE_DIR, wait, 0); + if (status != LTTNG_OK) { goto error_consumer; } @@ -1333,8 +1327,6 @@ int kernel_snapshot_record(struct ltt_kernel_session *ksess, (void) kernel_consumer_destroy_metadata(socket, ksess->metadata); } - ret = LTTNG_OK; - error_consumer: /* Close newly opened metadata stream. It's now on the consumer side. */ err = close(ksess->metadata_stream_fd); @@ -1348,9 +1340,8 @@ error: /* Restore metadata state.*/ ksess->metadata = saved_metadata; ksess->metadata_stream_fd = saved_metadata_fd; - rcu_read_unlock(); - return ret; + return status; } /* @@ -1402,11 +1393,12 @@ error: /* * Rotate a kernel session. * - * Return 0 on success or else return a LTTNG_ERR code. + * Return LTTNG_OK on success or else an LTTng error code. */ -int kernel_rotate_session(struct ltt_session *session) +enum lttng_error_code kernel_rotate_session(struct ltt_session *session) { int ret; + enum lttng_error_code status = LTTNG_OK; struct consumer_socket *socket; struct lttng_ht_iter iter; struct ltt_kernel_session *ksess = session->kernel_session; @@ -1427,37 +1419,15 @@ int kernel_rotate_session(struct ltt_session *session) socket, node.node) { struct ltt_kernel_channel *chan; - /* - * Account the metadata channel first to make sure the - * number of channels waiting for a rotation cannot - * reach 0 before we complete the iteration over all - * the channels. - */ - ret = rotate_add_channel_pending(ksess->metadata->key, - LTTNG_DOMAIN_KERNEL, session); - if (ret < 0) { - ret = LTTNG_ERR_KERN_CONSUMER_FAIL; - goto error; - } - - /* For each channel, ask the consumer to rotate it. */ + /* For each channel, ask the consumer to rotate it. */ cds_list_for_each_entry(chan, &ksess->channel_list.head, list) { - ret = rotate_add_channel_pending(chan->key, - LTTNG_DOMAIN_KERNEL, session); - if (ret < 0) { - ret = LTTNG_ERR_KERN_CONSUMER_FAIL; - goto error; - } - - DBG("Rotate channel %" PRIu64 ", session %s", chan->key, session->name); + DBG("Rotate kernel channel %" PRIu64 ", session %s", + chan->key, session->name); ret = consumer_rotate_channel(socket, chan->key, ksess->uid, ksess->gid, ksess->consumer, - ksess->consumer->subdir, - /* is_metadata_channel */ false, - session->current_archive_id, - &session->rotate_pending_relay); + /* is_metadata_channel */ false); if (ret < 0) { - ret = LTTNG_ERR_KERN_CONSUMER_FAIL; + status = LTTNG_ERR_KERN_CONSUMER_FAIL; goto error; } } @@ -1467,18 +1437,38 @@ int kernel_rotate_session(struct ltt_session *session) */ ret = consumer_rotate_channel(socket, ksess->metadata->key, ksess->uid, ksess->gid, ksess->consumer, - ksess->consumer->subdir, - /* is_metadata_channel */ true, - session->current_archive_id, - &session->rotate_pending_relay); + /* is_metadata_channel */ true); if (ret < 0) { - ret = LTTNG_ERR_KERN_CONSUMER_FAIL; + status = LTTNG_ERR_KERN_CONSUMER_FAIL; goto error; } } - ret = LTTNG_OK; +error: + rcu_read_unlock(); + return status; +} +enum lttng_error_code kernel_create_channel_subdirectories( + const struct ltt_kernel_session *ksess) +{ + enum lttng_error_code ret = LTTNG_OK; + enum lttng_trace_chunk_status chunk_status; + + rcu_read_lock(); + assert(ksess->current_trace_chunk); + + /* + * Create the index subdirectory which will take care + * of implicitly creating the channel's path. + */ + chunk_status = lttng_trace_chunk_create_subdirectory( + ksess->current_trace_chunk, + DEFAULT_KERNEL_TRACE_DIR "/" DEFAULT_INDEX_DIR); + if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { + ret = LTTNG_ERR_CREATE_DIR_FAIL; + goto error; + } error: rcu_read_unlock(); return ret;