X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-app.c;h=7b44fb4b48a050927fe2c897650dd2fda156dfac;hb=9a6545985844978f34f88b82bf1bcd649968c0a3;hp=2a810aba15fd2db25f4c47bf5d98bf3a70b0d607;hpb=92816cc33a1add3c8276839bd6335e17423577dd;p=lttng-tools.git diff --git a/src/bin/lttng-sessiond/ust-app.c b/src/bin/lttng-sessiond/ust-app.c index 2a810aba1..7b44fb4b4 100644 --- a/src/bin/lttng-sessiond/ust-app.c +++ b/src/bin/lttng-sessiond/ust-app.c @@ -487,9 +487,16 @@ void delete_ust_app_channel(int sock, struct ust_app_channel *ua_chan, registry = get_session_registry(ua_chan->session); if (registry) { ust_registry_channel_del_free(registry, ua_chan->key, - true); + sock >= 0); + } + /* + * A negative socket can be used by the caller when + * cleaning-up a ua_chan in an error path. Skip the + * accounting in this case. + */ + if (sock >= 0) { + save_per_pid_lost_discarded_counters(ua_chan); } - save_per_pid_lost_discarded_counters(ua_chan); } if (ua_chan->obj != NULL) { @@ -3017,7 +3024,7 @@ static int create_channel_per_pid(struct ust_app *app, if (ret < 0) { ERR("Error creating UST channel \"%s\" on the consumer daemon", ua_chan->name); - goto error; + goto error_remove_from_registry; } ret = send_channel_pid_to_ust(app, ua_sess, ua_chan); @@ -3025,7 +3032,7 @@ static int create_channel_per_pid(struct ust_app *app, if (ret != -ENOTCONN) { ERR("Error sending channel to application"); } - goto error; + goto error_remove_from_registry; } chan_reg_key = ua_chan->key; @@ -3045,9 +3052,13 @@ static int create_channel_per_pid(struct ust_app *app, if (cmd_ret != LTTNG_OK) { ret = - (int) cmd_ret; ERR("Failed to add channel to notification thread"); - goto error; + goto error_remove_from_registry; } +error_remove_from_registry: + if (ret) { + ust_registry_channel_del_free(registry, ua_chan->key, false); + } error: rcu_read_unlock(); return ret; @@ -5429,7 +5440,7 @@ static int reply_ust_register_channel(int sock, int cobjd, size_t nr_fields, struct ustctl_field *fields) { int ret, ret_code = 0; - uint32_t chan_id, reg_count; + uint32_t chan_id; uint64_t chan_reg_key; enum ustctl_channel_header type; struct ust_app *app; @@ -5481,13 +5492,12 @@ static int reply_ust_register_channel(int sock, int cobjd, assert(chan_reg); if (!chan_reg->register_done) { - reg_count = ust_registry_get_event_count(chan_reg); - if (reg_count < 31) { - type = USTCTL_CHANNEL_HEADER_COMPACT; - } else { - type = USTCTL_CHANNEL_HEADER_LARGE; - } - + /* + * TODO: eventually use the registry event count for + * this channel to better guess header type for per-pid + * buffers. + */ + type = USTCTL_CHANNEL_HEADER_LARGE; chan_reg->nr_ctx_fields = nr_fields; chan_reg->ctx_fields = fields; fields = NULL; @@ -5942,13 +5952,14 @@ void ust_app_destroy(struct ust_app *app) * Take a snapshot for a given UST session. The snapshot is sent to the given * output. * - * Return 0 on success or else a negative value. + * Returns LTTNG_OK on success or a LTTNG_ERR error code. */ -int ust_app_snapshot_record(struct ltt_ust_session *usess, +enum lttng_error_code ust_app_snapshot_record(struct ltt_ust_session *usess, struct snapshot_output *output, int wait, uint64_t nb_packets_per_stream) { int ret = 0; + enum lttng_error_code status = LTTNG_OK; struct lttng_ht_iter iter; struct ust_app *app; char pathname[PATH_MAX]; @@ -5984,7 +5995,7 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess, socket = consumer_find_socket_by_bitness(reg->bits_per_long, usess->consumer); if (!socket) { - ret = -EINVAL; + status = LTTNG_ERR_INVALID; goto error; } @@ -5994,27 +6005,28 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess, reg->uid, reg->bits_per_long); if (ret < 0) { PERROR("snprintf snapshot path"); + status = LTTNG_ERR_INVALID; goto error; } /* Add the UST default trace dir to path. */ cds_lfht_for_each_entry(reg->registry->channels->ht, &iter.iter, reg_chan, node.node) { - ret = consumer_snapshot_channel(socket, + status = consumer_snapshot_channel(socket, reg_chan->consumer_key, output, 0, usess->uid, usess->gid, pathname, wait, nb_packets_per_stream, trace_archive_id); - if (ret < 0) { + if (status != LTTNG_OK) { goto error; } } - ret = consumer_snapshot_channel(socket, + status = consumer_snapshot_channel(socket, reg->registry->reg.ust->metadata_key, output, 1, usess->uid, usess->gid, pathname, wait, 0, trace_archive_id); - if (ret < 0) { + if (status != LTTNG_OK) { goto error; } } @@ -6039,7 +6051,7 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess, socket = consumer_find_socket_by_bitness(app->bits_per_long, output->consumer); if (!socket) { - ret = -EINVAL; + status = LTTNG_ERR_INVALID; goto error; } @@ -6048,35 +6060,45 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess, ret = snprintf(pathname, sizeof(pathname), DEFAULT_UST_TRACE_DIR "/%s", ua_sess->path); if (ret < 0) { + status = LTTNG_ERR_INVALID; PERROR("snprintf snapshot path"); goto error; } cds_lfht_for_each_entry(ua_sess->channels->ht, &chan_iter.iter, ua_chan, node.node) { - ret = consumer_snapshot_channel(socket, + status = consumer_snapshot_channel(socket, ua_chan->key, output, 0, ua_sess->euid, ua_sess->egid, pathname, wait, nb_packets_per_stream, trace_archive_id); - if (ret < 0) { + switch (status) { + case LTTNG_OK: + break; + case LTTNG_ERR_CHAN_NOT_FOUND: + continue; + default: goto error; } } registry = get_session_registry(ua_sess); if (!registry) { - DBG("Application session is being torn down. Abort snapshot record."); - ret = -1; - goto error; + DBG("Application session is being torn down. Skip application."); + continue; } - ret = consumer_snapshot_channel(socket, + status = consumer_snapshot_channel(socket, registry->metadata_key, output, 1, ua_sess->euid, ua_sess->egid, pathname, wait, 0, trace_archive_id); - if (ret < 0) { + switch (status) { + case LTTNG_OK: + break; + case LTTNG_ERR_CHAN_NOT_FOUND: + continue; + default: goto error; } } @@ -6089,7 +6111,7 @@ int ust_app_snapshot_record(struct ltt_ust_session *usess, error: rcu_read_unlock(); - return ret; + return status; } /* @@ -6326,11 +6348,12 @@ int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess) /* * Rotate all the channels of a session. * - * Return 0 on success or else a negative value. + * Return LTTNG_OK on success or else an LTTng error code. */ -int ust_app_rotate_session(struct ltt_session *session) +enum lttng_error_code ust_app_rotate_session(struct ltt_session *session) { - int ret = 0; + int ret; + enum lttng_error_code cmd_ret = LTTNG_OK; struct lttng_ht_iter iter; struct ust_app *app; struct ltt_ust_session *usess = session->ust_session; @@ -6353,7 +6376,7 @@ int ust_app_rotate_session(struct ltt_session *session) socket = consumer_find_socket_by_bitness(reg->bits_per_long, usess->consumer); if (!socket) { - ret = -EINVAL; + cmd_ret = LTTNG_ERR_INVALID; goto error; } @@ -6362,6 +6385,7 @@ int ust_app_rotate_session(struct ltt_session *session) reg->uid, reg->bits_per_long); if (ret < 0 || ret == sizeof(pathname)) { PERROR("Failed to format rotation path"); + cmd_ret = LTTNG_ERR_INVALID; goto error; } @@ -6375,6 +6399,7 @@ int ust_app_rotate_session(struct ltt_session *session) /* is_metadata_channel */ false, session->current_archive_id); if (ret < 0) { + cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER; goto error; } } @@ -6388,6 +6413,7 @@ int ust_app_rotate_session(struct ltt_session *session) /* is_metadata_channel */ true, session->current_archive_id); if (ret < 0) { + cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER; goto error; } } @@ -6412,6 +6438,7 @@ int ust_app_rotate_session(struct ltt_session *session) ua_sess->path); if (ret < 0 || ret == sizeof(pathname)) { PERROR("Failed to format rotation path"); + cmd_ret = LTTNG_ERR_INVALID; goto error; } @@ -6419,15 +6446,14 @@ int ust_app_rotate_session(struct ltt_session *session) socket = consumer_find_socket_by_bitness(app->bits_per_long, usess->consumer); if (!socket) { - ret = -EINVAL; + cmd_ret = LTTNG_ERR_INVALID; goto error; } registry = get_session_registry(ua_sess); if (!registry) { - DBG("Application session is being torn down. Abort snapshot record."); - ret = -1; - goto error; + DBG("Application session is being torn down. Skip application."); + continue; } @@ -6440,6 +6466,10 @@ int ust_app_rotate_session(struct ltt_session *session) /* is_metadata_channel */ false, session->current_archive_id); if (ret < 0) { + /* Per-PID buffer and application going away. */ + if (ret == -LTTNG_ERR_CHAN_NOT_FOUND) + continue; + cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER; goto error; } } @@ -6452,6 +6482,10 @@ int ust_app_rotate_session(struct ltt_session *session) /* is_metadata_channel */ true, session->current_archive_id); if (ret < 0) { + /* Per-PID buffer and application going away. */ + if (ret == -LTTNG_ERR_CHAN_NOT_FOUND) + continue; + cmd_ret = LTTNG_ERR_ROTATION_FAIL_CONSUMER; goto error; } } @@ -6462,9 +6496,9 @@ int ust_app_rotate_session(struct ltt_session *session) break; } - ret = LTTNG_OK; + cmd_ret = LTTNG_OK; error: rcu_read_unlock(); - return ret; + return cmd_ret; }