X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fust-consumer%2Fust-consumer.c;h=429ab14b1d728a0f15e09872c1763c9c76e0dde4;hp=be00191749ba5e81e03fef925f1c95ee3bb2ee96;hb=b6797c8e4aeb3f7c33be9726ab33655e7667e07e;hpb=934ba8fdfbe546a25a9df61b6292bdb3d28e4ab1 diff --git a/src/common/ust-consumer/ust-consumer.c b/src/common/ust-consumer/ust-consumer.c index be0019174..429ab14b1 100644 --- a/src/common/ust-consumer/ust-consumer.c +++ b/src/common/ust-consumer/ust-consumer.c @@ -37,13 +37,14 @@ #include #include #include +#include #include #include "ust-consumer.h" #define INT_MAX_STR_LEN 12 /* includes \0 */ -extern struct lttng_consumer_global_data consumer_data; +extern struct lttng_consumer_global_data the_consumer_data; extern int consumer_poll_timeout; /* @@ -65,7 +66,7 @@ static void destroy_channel(struct lttng_consumer_channel *channel) health_code_update(); cds_list_del(&stream->send_node); - ustctl_destroy_stream(stream->ustream); + lttng_ust_ctl_destroy_stream(stream->ustream); lttng_trace_chunk_put(stream->trace_chunk); free(stream); } @@ -249,7 +250,7 @@ static int create_ust_streams(struct lttng_consumer_channel *channel, struct lttng_consumer_local_data *ctx) { int ret, cpu = 0; - struct ustctl_consumer_stream *ustream; + struct lttng_ust_ctl_consumer_stream *ustream; struct lttng_consumer_stream *stream; pthread_mutex_t *current_stream_lock = NULL; @@ -260,7 +261,7 @@ static int create_ust_streams(struct lttng_consumer_channel *channel, * While a stream is available from ustctl. When NULL is returned, we've * reached the end of the possible stream for the channel. */ - while ((ustream = ustctl_create_stream(channel->uchan, cpu))) { + while ((ustream = lttng_ust_ctl_create_stream(channel->uchan, cpu))) { int wait_fd; int ust_metadata_pipe[2]; @@ -274,7 +275,7 @@ static int create_ust_streams(struct lttng_consumer_channel *channel, } wait_fd = ust_metadata_pipe[0]; } else { - wait_fd = ustctl_stream_get_wait_fd(ustream); + wait_fd = lttng_ust_ctl_stream_get_wait_fd(ustream); } /* Allocate consumer stream object. */ @@ -306,10 +307,10 @@ static int create_ust_streams(struct lttng_consumer_channel *channel, */ cds_list_add_tail(&stream->send_node, &channel->streams.head); - ret = ustctl_get_max_subbuf_size(stream->ustream, + ret = lttng_ust_ctl_get_max_subbuf_size(stream->ustream, &stream->max_sb_size); if (ret < 0) { - ERR("ustctl_get_max_subbuf_size failed for stream %s", + ERR("lttng_ust_ctl_get_max_subbuf_size failed for stream %s", stream->name); goto error; } @@ -352,48 +353,6 @@ error_alloc: return ret; } -/* - * create_posix_shm is never called concurrently within a process. - */ -static -int create_posix_shm(void) -{ - char tmp_name[NAME_MAX]; - int shmfd, ret; - - ret = snprintf(tmp_name, NAME_MAX, "/ust-shm-consumer-%d", getpid()); - if (ret < 0) { - PERROR("snprintf"); - return -1; - } - /* - * Allocate shm, and immediately unlink its shm oject, keeping - * only the file descriptor as a reference to the object. - * We specifically do _not_ use the / at the beginning of the - * pathname so that some OS implementations can keep it local to - * the process (POSIX leaves this implementation-defined). - */ - shmfd = shm_open(tmp_name, O_CREAT | O_EXCL | O_RDWR, 0700); - if (shmfd < 0) { - PERROR("shm_open"); - goto error_shm_open; - } - ret = shm_unlink(tmp_name); - if (ret < 0 && errno != ENOENT) { - PERROR("shm_unlink"); - goto error_shm_release; - } - return shmfd; - -error_shm_release: - ret = close(shmfd); - if (ret) { - PERROR("close"); - } -error_shm_open: - return -1; -} - static int open_ust_stream_fd(struct lttng_consumer_channel *channel, int cpu, const struct lttng_credentials *session_credentials) { @@ -401,7 +360,7 @@ static int open_ust_stream_fd(struct lttng_consumer_channel *channel, int cpu, int ret; if (!channel->shm_path[0]) { - return create_posix_shm(); + return shm_create_anonymous("ust-consumer"); } ret = get_stream_shm_path(shm_path, channel->shm_path, cpu); if (ret) { @@ -423,12 +382,12 @@ error_shm_path: * Return 0 on success or else a negative value. */ static int create_ust_channel(struct lttng_consumer_channel *channel, - struct ustctl_consumer_channel_attr *attr, - struct ustctl_consumer_channel **ust_chanp) + struct lttng_ust_ctl_consumer_channel_attr *attr, + struct lttng_ust_ctl_consumer_channel **ust_chanp) { int ret, nr_stream_fds, i, j; int *stream_fds; - struct ustctl_consumer_channel *ust_channel; + struct lttng_ust_ctl_consumer_channel *ust_channel; assert(channel); assert(attr); @@ -445,7 +404,7 @@ static int create_ust_channel(struct lttng_consumer_channel *channel, if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA) nr_stream_fds = 1; else - nr_stream_fds = ustctl_get_nr_stream_per_channel(); + nr_stream_fds = lttng_ust_ctl_get_nr_stream_per_channel(); stream_fds = zmalloc(nr_stream_fds * sizeof(*stream_fds)); if (!stream_fds) { ret = -1; @@ -459,7 +418,7 @@ static int create_ust_channel(struct lttng_consumer_channel *channel, goto error_open; } } - ust_channel = ustctl_create_channel(attr, stream_fds, nr_stream_fds); + ust_channel = lttng_ust_ctl_create_channel(attr, stream_fds, nr_stream_fds); if (!ust_channel) { ret = -1; goto error_create; @@ -526,7 +485,7 @@ static int send_sessiond_stream(int sock, struct lttng_consumer_stream *stream) DBG("UST consumer sending stream %" PRIu64 " to sessiond", stream->key); /* Send stream to session daemon. */ - ret = ustctl_send_stream_to_sessiond(sock, stream->ustream); + ret = lttng_ust_ctl_send_stream_to_sessiond(sock, stream->ustream); if (ret < 0) { goto error; } @@ -590,12 +549,12 @@ static int send_channel_to_sessiond_and_relayd(int sock, } /* Send channel to sessiond. */ - ret = ustctl_send_channel_to_sessiond(sock, channel->uchan); + ret = lttng_ust_ctl_send_channel_to_sessiond(sock, channel->uchan); if (ret < 0) { goto error; } - ret = ustctl_channel_close_wakeup_fd(channel->uchan); + ret = lttng_ust_ctl_channel_close_wakeup_fd(channel->uchan); if (ret < 0) { goto error; } @@ -613,7 +572,7 @@ static int send_channel_to_sessiond_and_relayd(int sock, } /* Tell sessiond there is no more stream. */ - ret = ustctl_send_stream_to_sessiond(sock, NULL); + ret = lttng_ust_ctl_send_stream_to_sessiond(sock, NULL); if (ret < 0) { goto error; } @@ -639,7 +598,7 @@ error: */ static int ask_channel(struct lttng_consumer_local_data *ctx, struct lttng_consumer_channel *channel, - struct ustctl_consumer_channel_attr *attr) + struct lttng_ust_ctl_consumer_channel_attr *attr) { int ret; @@ -668,7 +627,7 @@ static int ask_channel(struct lttng_consumer_local_data *ctx, goto end; } - channel->wait_fd = ustctl_channel_get_wait_fd(channel->uchan); + channel->wait_fd = lttng_ust_ctl_channel_get_wait_fd(channel->uchan); /* * For the snapshots (no monitor), we create the metadata streams @@ -749,7 +708,7 @@ static int flush_channel(uint64_t chan_key) goto error; } - ht = consumer_data.stream_per_chan_id_ht; + ht = the_consumer_data.stream_per_chan_id_ht; /* For each stream of the channel id, flush it. */ cds_lfht_for_each_entry_duplicate(ht->ht, @@ -768,7 +727,7 @@ static int flush_channel(uint64_t chan_key) } if (!stream->quiescent) { - ustctl_flush_buffer(stream->ustream, 0); + lttng_ust_ctl_flush_buffer(stream->ustream, 0); stream->quiescent = true; } next: @@ -803,7 +762,7 @@ static int clear_quiescent_channel(uint64_t chan_key) goto error; } - ht = consumer_data.stream_per_chan_id_ht; + ht = the_consumer_data.stream_per_chan_id_ht; /* For each stream of the channel id, clear quiescent state. */ cds_lfht_for_each_entry_duplicate(ht->ht, @@ -847,7 +806,7 @@ static int close_metadata(uint64_t chan_key) goto error; } - pthread_mutex_lock(&consumer_data.lock); + pthread_mutex_lock(&the_consumer_data.lock); pthread_mutex_lock(&channel->lock); channel_monitor = channel->monitor; if (cds_lfht_is_node_deleted(&channel->node.node)) { @@ -856,7 +815,7 @@ static int close_metadata(uint64_t chan_key) lttng_ustconsumer_close_metadata(channel); pthread_mutex_unlock(&channel->lock); - pthread_mutex_unlock(&consumer_data.lock); + pthread_mutex_unlock(&the_consumer_data.lock); /* * The ownership of a metadata channel depends on the type of @@ -893,7 +852,7 @@ static int close_metadata(uint64_t chan_key) return ret; error_unlock: pthread_mutex_unlock(&channel->lock); - pthread_mutex_unlock(&consumer_data.lock); + pthread_mutex_unlock(&the_consumer_data.lock); error: return ret; } @@ -1080,7 +1039,7 @@ int get_current_subbuf_addr(struct lttng_consumer_stream *stream, unsigned long mmap_offset; const char *mmap_base; - mmap_base = ustctl_get_mmap_base(stream->ustream); + mmap_base = lttng_ust_ctl_get_mmap_base(stream->ustream); if (!mmap_base) { ERR("Failed to get mmap base for stream `%s`", stream->name); @@ -1088,7 +1047,7 @@ int get_current_subbuf_addr(struct lttng_consumer_stream *stream, goto error; } - ret = ustctl_get_mmap_read_offset(stream->ustream, &mmap_offset); + ret = lttng_ust_ctl_get_mmap_read_offset(stream->ustream, &mmap_offset); if (ret != 0) { ERR("Failed to get mmap offset for stream `%s`", stream->name); ret = -EINVAL; @@ -1169,7 +1128,7 @@ static int snapshot_channel(struct lttng_consumer_channel *channel, * Else, if quiescent, it has already been done by the prior stop. */ if (!stream->quiescent) { - ustctl_flush_buffer(stream->ustream, 0); + lttng_ust_ctl_flush_buffer(stream->ustream, 0); } ret = lttng_ustconsumer_take_snapshot(stream); @@ -1210,10 +1169,10 @@ static int snapshot_channel(struct lttng_consumer_channel *channel, DBG("UST consumer taking snapshot at pos %lu", consumed_pos); - ret = ustctl_get_subbuf(stream->ustream, &consumed_pos); + ret = lttng_ust_ctl_get_subbuf(stream->ustream, &consumed_pos); if (ret < 0) { if (ret != -EAGAIN) { - PERROR("ustctl_get_subbuf snapshot"); + PERROR("lttng_ust_ctl_get_subbuf snapshot"); goto error_close_stream; } DBG("UST consumer get subbuf failed. Skipping it."); @@ -1222,15 +1181,15 @@ static int snapshot_channel(struct lttng_consumer_channel *channel, continue; } - ret = ustctl_get_subbuf_size(stream->ustream, &len); + ret = lttng_ust_ctl_get_subbuf_size(stream->ustream, &len); if (ret < 0) { - ERR("Snapshot ustctl_get_subbuf_size"); + ERR("Snapshot lttng_ust_ctl_get_subbuf_size"); goto error_put_subbuf; } - ret = ustctl_get_padded_subbuf_size(stream->ustream, &padded_len); + ret = lttng_ust_ctl_get_padded_subbuf_size(stream->ustream, &padded_len); if (ret < 0) { - ERR("Snapshot ustctl_get_padded_subbuf_size"); + ERR("Snapshot lttng_ust_ctl_get_padded_subbuf_size"); goto error_put_subbuf; } @@ -1255,9 +1214,9 @@ static int snapshot_channel(struct lttng_consumer_channel *channel, } } - ret = ustctl_put_subbuf(stream->ustream); + ret = lttng_ust_ctl_put_subbuf(stream->ustream); if (ret < 0) { - ERR("Snapshot ustctl_put_subbuf"); + ERR("Snapshot lttng_ust_ctl_put_subbuf"); goto error_close_stream; } consumed_pos += stream->max_sb_size; @@ -1272,8 +1231,8 @@ static int snapshot_channel(struct lttng_consumer_channel *channel, return 0; error_put_subbuf: - if (ustctl_put_subbuf(stream->ustream) < 0) { - ERR("Snapshot ustctl_put_subbuf"); + if (lttng_ust_ctl_put_subbuf(stream->ustream) < 0) { + ERR("Snapshot lttng_ust_ctl_put_subbuf"); } error_close_stream: consumer_stream_close(stream); @@ -1283,6 +1242,17 @@ error_unlock: return ret; } +static +void metadata_stream_reset_cache_consumed_position( + struct lttng_consumer_stream *stream) +{ + ASSERT_LOCKED(stream->lock); + + DBG("Reset metadata cache of session %" PRIu64, + stream->chan->session_id); + stream->ust_metadata_pushed = 0; +} + /* * Receive the metadata updates from the sessiond. Supports receiving * overlapping metadata, but is needs to always belong to a contiguous @@ -1297,6 +1267,7 @@ int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset, { int ret, ret_code = LTTCOMM_CONSUMERD_SUCCESS; char *metadata_str; + enum consumer_metadata_cache_write_status cache_write_status; DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, len); @@ -1320,10 +1291,41 @@ int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset, health_code_update(); pthread_mutex_lock(&channel->metadata_cache->lock); - ret = consumer_metadata_cache_write(channel, offset, len, version, + cache_write_status = consumer_metadata_cache_write( + channel->metadata_cache, offset, len, version, metadata_str); pthread_mutex_unlock(&channel->metadata_cache->lock); - if (ret < 0) { + switch (cache_write_status) { + case CONSUMER_METADATA_CACHE_WRITE_STATUS_NO_CHANGE: + /* + * The write entirely overlapped with existing contents of the + * same metadata version (same content); there is nothing to do. + */ + break; + case CONSUMER_METADATA_CACHE_WRITE_STATUS_INVALIDATED: + /* + * The metadata cache was invalidated (previously pushed + * content has been overwritten). Reset the stream's consumed + * metadata position to ensure the metadata poll thread consumes + * the whole cache. + */ + pthread_mutex_lock(&channel->metadata_stream->lock); + metadata_stream_reset_cache_consumed_position( + channel->metadata_stream); + pthread_mutex_unlock(&channel->metadata_stream->lock); + /* Fall-through. */ + case CONSUMER_METADATA_CACHE_WRITE_STATUS_APPENDED_CONTENT: + /* + * In both cases, the metadata poll thread has new data to + * consume. + */ + ret = consumer_metadata_wakeup_pipe(channel); + if (ret) { + ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; + goto end_free; + } + break; + case CONSUMER_METADATA_CACHE_WRITE_STATUS_ERROR: /* Unable to handle metadata. Notify session daemon. */ ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; /* @@ -1332,6 +1334,8 @@ int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset, * waiting for the metadata cache to be flushed. */ goto end_free; + default: + abort(); } if (!wait) { @@ -1359,26 +1363,31 @@ end: int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, int sock, struct pollfd *consumer_sockpoll) { - ssize_t ret; + int ret_func; enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; struct lttcomm_consumer_msg msg; struct lttng_consumer_channel *channel = NULL; health_code_update(); - ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); - if (ret != sizeof(msg)) { - DBG("Consumer received unexpected message size %zd (expects %zu)", - ret, sizeof(msg)); - /* - * The ret value might 0 meaning an orderly shutdown but this is ok - * since the caller handles this. - */ - if (ret > 0) { - lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); - ret = -1; + { + ssize_t ret_recv; + + ret_recv = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); + if (ret_recv != sizeof(msg)) { + DBG("Consumer received unexpected message size %zd (expects %zu)", + ret_recv, sizeof(msg)); + /* + * The ret value might 0 meaning an orderly shutdown but this is ok + * since the caller handles this. + */ + if (ret_recv > 0) { + lttng_consumer_send_error(ctx, + LTTCOMM_CONSUMERD_ERROR_RECV_CMD); + ret_recv = -1; + } + return ret_recv; } - return ret; } health_code_update(); @@ -1438,7 +1447,8 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, } case LTTNG_CONSUMER_DATA_PENDING: { - int ret, is_data_pending; + int is_data_pending; + ssize_t ret_send; uint64_t id = msg.u.data_pending.session_id; DBG("UST consumer data pending command for id %" PRIu64, id); @@ -1446,10 +1456,11 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, is_data_pending = consumer_data_pending(id); /* Send back returned value to session daemon */ - ret = lttcomm_send_unix_sock(sock, &is_data_pending, + ret_send = lttcomm_send_unix_sock(sock, &is_data_pending, sizeof(is_data_pending)); - if (ret < 0) { - DBG("Error when sending the data pending ret code: %d", ret); + if (ret_send < 0) { + DBG("Error when sending the data pending ret code: %zd", + ret_send); goto error_fatal; } @@ -1461,8 +1472,8 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, } case LTTNG_CONSUMER_ASK_CHANNEL_CREATION: { - int ret; - struct ustctl_consumer_channel_attr attr; + int ret_ask_channel, ret_add_channel, ret_send; + struct lttng_ust_ctl_consumer_channel_attr attr; const uint64_t chunk_id = msg.u.ask_channel.chunk_id.value; const struct lttng_credentials buffer_credentials = { .uid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.ask_channel.buffer_credentials.uid), @@ -1515,15 +1526,15 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, switch (msg.u.ask_channel.output) { case LTTNG_EVENT_MMAP: default: - attr.output = LTTNG_UST_MMAP; + attr.output = LTTNG_UST_ABI_MMAP; break; } /* Translate and save channel type. */ switch (msg.u.ask_channel.type) { - case LTTNG_UST_CHAN_PER_CPU: + case LTTNG_UST_ABI_CHAN_PER_CPU: channel->type = CONSUMER_CHANNEL_TYPE_DATA; - attr.type = LTTNG_UST_CHAN_PER_CPU; + attr.type = LTTNG_UST_ABI_CHAN_PER_CPU; /* * Set refcount to 1 for owner. Below, we will * pass ownership to the @@ -1531,9 +1542,9 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, */ channel->refcount = 1; break; - case LTTNG_UST_CHAN_METADATA: + case LTTNG_UST_ABI_CHAN_METADATA: channel->type = CONSUMER_CHANNEL_TYPE_METADATA; - attr.type = LTTNG_UST_CHAN_METADATA; + attr.type = LTTNG_UST_ABI_CHAN_METADATA; break; default: assert(0); @@ -1542,14 +1553,17 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, health_code_update(); - ret = ask_channel(ctx, channel, &attr); - if (ret < 0) { + ret_ask_channel = ask_channel(ctx, channel, &attr); + if (ret_ask_channel < 0) { goto end_channel_error; } - if (msg.u.ask_channel.type == LTTNG_UST_CHAN_METADATA) { - ret = consumer_metadata_cache_allocate(channel); - if (ret < 0) { + if (msg.u.ask_channel.type == LTTNG_UST_ABI_CHAN_METADATA) { + int ret_allocate; + + ret_allocate = consumer_metadata_cache_allocate( + channel); + if (ret_allocate < 0) { ERR("Allocating metadata cache"); goto end_channel_error; } @@ -1578,9 +1592,9 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, * If add_channel succeeds, ownership of the channel is * passed to consumer_thread_channel_poll(). */ - ret = add_channel(channel, ctx); - if (ret < 0) { - if (msg.u.ask_channel.type == LTTNG_UST_CHAN_METADATA) { + ret_add_channel = add_channel(channel, ctx); + if (ret_add_channel < 0) { + if (msg.u.ask_channel.type == LTTNG_UST_ABI_CHAN_METADATA) { if (channel->switch_timer_enabled == 1) { consumer_timer_switch_stop(channel); } @@ -1602,8 +1616,8 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, * everything went well and should wait to receive the channel and * streams with ustctl API. */ - ret = consumer_send_status_channel(sock, channel); - if (ret < 0) { + ret_send = consumer_send_status_channel(sock, channel); + if (ret_send < 0) { /* * There is probably a problem on the socket. */ @@ -1616,10 +1630,10 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, { int ret, relayd_err = 0; uint64_t key = msg.u.get_channel.key; - struct lttng_consumer_channel *channel; + struct lttng_consumer_channel *found_channel; - channel = consumer_find_channel(key); - if (!channel) { + found_channel = consumer_find_channel(key); + if (!found_channel) { ERR("UST consumer get channel key %" PRIu64 " not found", key); ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; goto end_get_channel; @@ -1628,8 +1642,8 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, health_code_update(); /* Send the channel to sessiond (and relayd, if applicable). */ - ret = send_channel_to_sessiond_and_relayd(sock, channel, ctx, - &relayd_err); + ret = send_channel_to_sessiond_and_relayd( + sock, found_channel, ctx, &relayd_err); if (ret < 0) { if (relayd_err) { /* @@ -1653,11 +1667,11 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, * In no monitor mode, the streams ownership is kept inside the channel * so don't send them to the data thread. */ - if (!channel->monitor) { + if (!found_channel->monitor) { goto end_get_channel; } - ret = send_streams_to_thread(channel, ctx); + ret = send_streams_to_thread(found_channel, ctx); if (ret < 0) { /* * If we are unable to send the stream to the thread, there is @@ -1666,7 +1680,7 @@ int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, goto error_get_channel_fatal; } /* List MUST be empty after or else it could be reused. */ - assert(cds_list_empty(&channel->streams.head)); + assert(cds_list_empty(&found_channel->streams.head)); end_get_channel: goto end_msg_sessiond; error_get_channel_fatal: @@ -1727,13 +1741,13 @@ end_get_channel_nosignal: uint64_t key = msg.u.push_metadata.key; uint64_t offset = msg.u.push_metadata.target_offset; uint64_t version = msg.u.push_metadata.version; - struct lttng_consumer_channel *channel; + struct lttng_consumer_channel *found_channel; DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, len); - channel = consumer_find_channel(key); - if (!channel) { + found_channel = consumer_find_channel(key); + if (!found_channel) { /* * This is possible if the metadata creation on the consumer side * is in flight vis-a-vis a concurrent push metadata from the @@ -1776,8 +1790,8 @@ end_get_channel_nosignal: health_code_update(); - ret = lttng_ustconsumer_recv_metadata(sock, key, offset, - len, version, channel, 0, 1); + ret = lttng_ustconsumer_recv_metadata(sock, key, offset, len, + version, found_channel, 0, 1); if (ret < 0) { /* error receiving from sessiond */ goto error_push_metadata_fatal; @@ -1802,38 +1816,46 @@ error_push_metadata_fatal: } case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: { - struct lttng_consumer_channel *channel; + struct lttng_consumer_channel *found_channel; uint64_t key = msg.u.snapshot_channel.key; + int ret_send; - channel = consumer_find_channel(key); - if (!channel) { + found_channel = consumer_find_channel(key); + if (!found_channel) { DBG("UST snapshot channel not found for key %" PRIu64, key); ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; } else { if (msg.u.snapshot_channel.metadata) { - ret = snapshot_metadata(channel, key, + int ret_snapshot; + + ret_snapshot = snapshot_metadata(found_channel, + key, msg.u.snapshot_channel.pathname, msg.u.snapshot_channel.relayd_id, ctx); - if (ret < 0) { + if (ret_snapshot < 0) { ERR("Snapshot metadata failed"); ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; } } else { - ret = snapshot_channel(channel, key, + int ret_snapshot; + + ret_snapshot = snapshot_channel(found_channel, + key, msg.u.snapshot_channel.pathname, msg.u.snapshot_channel.relayd_id, - msg.u.snapshot_channel.nb_packets_per_stream, + msg.u.snapshot_channel + .nb_packets_per_stream, ctx); - if (ret < 0) { + if (ret_snapshot < 0) { ERR("Snapshot channel failed"); ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; } } } health_code_update(); - ret = consumer_send_status_msg(sock, ret_code); - if (ret < 0) { + ret_send = consumer_send_status_msg(sock, ret_code); + if (ret_send < 0) { /* Somehow, the session daemon is not responding anymore. */ goto end_nosignal; } @@ -1853,9 +1875,9 @@ error_push_metadata_fatal: DBG("UST consumer discarded events command for session id %" PRIu64, id); rcu_read_lock(); - pthread_mutex_lock(&consumer_data.lock); + pthread_mutex_lock(&the_consumer_data.lock); - ht = consumer_data.stream_list_ht; + ht = the_consumer_data.stream_list_ht; /* * We only need a reference to the channel, but they are not @@ -1874,7 +1896,7 @@ error_push_metadata_fatal: break; } } - pthread_mutex_unlock(&consumer_data.lock); + pthread_mutex_unlock(&the_consumer_data.lock); rcu_read_unlock(); DBG("UST consumer discarded events command for session id %" @@ -1904,9 +1926,9 @@ error_push_metadata_fatal: DBG("UST consumer lost packets command for session id %" PRIu64, id); rcu_read_lock(); - pthread_mutex_lock(&consumer_data.lock); + pthread_mutex_lock(&the_consumer_data.lock); - ht = consumer_data.stream_list_ht; + ht = the_consumer_data.stream_list_ht; /* * We only need a reference to the channel, but they are not @@ -1924,7 +1946,7 @@ error_push_metadata_fatal: break; } } - pthread_mutex_unlock(&consumer_data.lock); + pthread_mutex_unlock(&the_consumer_data.lock); rcu_read_unlock(); DBG("UST consumer lost packets command for session id %" @@ -1944,40 +1966,44 @@ error_push_metadata_fatal: } case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: { - int channel_monitor_pipe; + int channel_monitor_pipe, ret_send, + ret_set_channel_monitor_pipe; + ssize_t ret_recv; ret_code = LTTCOMM_CONSUMERD_SUCCESS; /* Successfully received the command's type. */ - ret = consumer_send_status_msg(sock, ret_code); - if (ret < 0) { + ret_send = consumer_send_status_msg(sock, ret_code); + if (ret_send < 0) { goto error_fatal; } - ret = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, - 1); - if (ret != sizeof(channel_monitor_pipe)) { + ret_recv = lttcomm_recv_fds_unix_sock( + sock, &channel_monitor_pipe, 1); + if (ret_recv != sizeof(channel_monitor_pipe)) { ERR("Failed to receive channel monitor pipe"); goto error_fatal; } DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); - ret = consumer_timer_thread_set_channel_monitor_pipe( - channel_monitor_pipe); - if (!ret) { + ret_set_channel_monitor_pipe = + consumer_timer_thread_set_channel_monitor_pipe( + channel_monitor_pipe); + if (!ret_set_channel_monitor_pipe) { int flags; + int ret_fcntl; ret_code = LTTCOMM_CONSUMERD_SUCCESS; /* Set the pipe as non-blocking. */ - ret = fcntl(channel_monitor_pipe, F_GETFL, 0); - if (ret == -1) { + ret_fcntl = fcntl(channel_monitor_pipe, F_GETFL, 0); + if (ret_fcntl == -1) { PERROR("fcntl get flags of the channel monitoring pipe"); goto error_fatal; } - flags = ret; + flags = ret_fcntl; - ret = fcntl(channel_monitor_pipe, F_SETFL, + ret_fcntl = fcntl(channel_monitor_pipe, F_SETFL, flags | O_NONBLOCK); - if (ret == -1) { + if (ret_fcntl == -1) { PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); goto error_fatal; } @@ -1989,31 +2015,35 @@ error_push_metadata_fatal: } case LTTNG_CONSUMER_ROTATE_CHANNEL: { - struct lttng_consumer_channel *channel; + struct lttng_consumer_channel *found_channel; uint64_t key = msg.u.rotate_channel.key; + int ret_send_status; - channel = consumer_find_channel(key); - if (!channel) { + found_channel = consumer_find_channel(key); + if (!found_channel) { DBG("Channel %" PRIu64 " not found", key); ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; } else { + int rotate_channel; + /* * Sample the rotate position of all the streams in * this channel. */ - ret = lttng_consumer_rotate_channel(channel, key, + rotate_channel = lttng_consumer_rotate_channel( + found_channel, key, msg.u.rotate_channel.relayd_id, - msg.u.rotate_channel.metadata, - ctx); - if (ret < 0) { + msg.u.rotate_channel.metadata, ctx); + if (rotate_channel < 0) { ERR("Rotate channel failed"); ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; } health_code_update(); } - ret = consumer_send_status_msg(sock, ret_code); - if (ret < 0) { + + ret_send_status = consumer_send_status_msg(sock, ret_code); + if (ret_send_status < 0) { /* Somehow, the session daemon is not responding anymore. */ goto end_rotate_channel_nosignal; } @@ -2025,10 +2055,14 @@ error_push_metadata_fatal: * handle this, but it needs to be after the * consumer_send_status_msg() call. */ - if (channel) { - ret = lttng_consumer_rotate_ready_streams( - channel, key, ctx); - if (ret < 0) { + if (found_channel) { + int ret_rotate_read_streams; + + ret_rotate_read_streams = + lttng_consumer_rotate_ready_streams( + found_channel, key, + ctx); + if (ret_rotate_read_streams < 0) { ERR("Rotate channel failed"); } } @@ -2038,24 +2072,28 @@ end_rotate_channel_nosignal: } case LTTNG_CONSUMER_CLEAR_CHANNEL: { - struct lttng_consumer_channel *channel; + struct lttng_consumer_channel *found_channel; uint64_t key = msg.u.clear_channel.key; + int ret_send_status; - channel = consumer_find_channel(key); - if (!channel) { + found_channel = consumer_find_channel(key); + if (!found_channel) { DBG("Channel %" PRIu64 " not found", key); ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; } else { - ret = lttng_consumer_clear_channel(channel); - if (ret) { + int ret_clear_channel; + + ret_clear_channel = lttng_consumer_clear_channel( + found_channel); + if (ret_clear_channel) { ERR("Clear channel failed key %" PRIu64, key); - ret_code = ret; + ret_code = ret_clear_channel; } health_code_update(); } - ret = consumer_send_status_msg(sock, ret_code); - if (ret < 0) { + ret_send_status = consumer_send_status_msg(sock, ret_code); + if (ret_send_status < 0) { /* Somehow, the session daemon is not responding anymore. */ goto end_nosignal; } @@ -2063,11 +2101,13 @@ end_rotate_channel_nosignal: } case LTTNG_CONSUMER_INIT: { + int ret_send_status; + ret_code = lttng_consumer_init_command(ctx, msg.u.init.sessiond_uuid); health_code_update(); - ret = consumer_send_status_msg(sock, ret_code); - if (ret < 0) { + ret_send_status = consumer_send_status_msg(sock, ret_code); + if (ret_send_status < 0) { /* Somehow, the session daemon is not responding anymore. */ goto end_nosignal; } @@ -2095,11 +2135,13 @@ end_rotate_channel_nosignal: */ if (is_local_trace) { int chunk_dirfd; + int ret_send_status; + ssize_t ret_recv; /* Acnowledge the reception of the command. */ - ret = consumer_send_status_msg(sock, - LTTCOMM_CONSUMERD_SUCCESS); - if (ret < 0) { + ret_send_status = consumer_send_status_msg( + sock, LTTCOMM_CONSUMERD_SUCCESS); + if (ret_send_status < 0) { /* Somehow, the session daemon is not responding anymore. */ goto end_nosignal; } @@ -2107,8 +2149,9 @@ end_rotate_channel_nosignal: /* * Receive trace chunk domain dirfd. */ - ret = lttcomm_recv_fds_unix_sock(sock, &chunk_dirfd, 1); - if (ret != sizeof(chunk_dirfd)) { + ret_recv = lttcomm_recv_fds_unix_sock( + sock, &chunk_dirfd, 1); + if (ret_recv != sizeof(chunk_dirfd)) { ERR("Failed to receive trace chunk domain directory file descriptor"); goto error_fatal; } @@ -2147,7 +2190,7 @@ end_rotate_channel_nosignal: const uint64_t relayd_id = msg.u.close_trace_chunk.relayd_id.value; struct lttcomm_consumer_close_trace_chunk_reply reply; - char closed_trace_chunk_path[LTTNG_PATH_MAX]; + char closed_trace_chunk_path[LTTNG_PATH_MAX] = {}; int ret; ret_code = lttng_consumer_close_trace_chunk( @@ -2188,13 +2231,14 @@ end_rotate_channel_nosignal: case LTTNG_CONSUMER_OPEN_CHANNEL_PACKETS: { const uint64_t key = msg.u.open_channel_packets.key; - struct lttng_consumer_channel *channel = + struct lttng_consumer_channel *found_channel = consumer_find_channel(key); - if (channel) { - pthread_mutex_lock(&channel->lock); - ret_code = lttng_consumer_open_channel_packets(channel); - pthread_mutex_unlock(&channel->lock); + if (found_channel) { + pthread_mutex_lock(&found_channel->lock); + ret_code = lttng_consumer_open_channel_packets( + found_channel); + pthread_mutex_unlock(&found_channel->lock); } else { /* * The channel could have disappeared in per-pid @@ -2216,7 +2260,7 @@ end_nosignal: * Return 1 to indicate success since the 0 value can be a socket * shutdown during the recv() or send() call. */ - ret = 1; + ret_func = 1; goto end; end_msg_sessiond: @@ -2225,11 +2269,16 @@ end_msg_sessiond: * the caller because the session daemon socket management is done * elsewhere. Returning a negative code or 0 will shutdown the consumer. */ - ret = consumer_send_status_msg(sock, ret_code); - if (ret < 0) { - goto error_fatal; + { + int ret_send_status; + + ret_send_status = consumer_send_status_msg(sock, ret_code); + if (ret_send_status < 0) { + goto error_fatal; + } } - ret = 1; + + ret_func = 1; goto end; end_channel_error: @@ -2241,32 +2290,37 @@ end_channel_error: destroy_channel(channel); } /* We have to send a status channel message indicating an error. */ - ret = consumer_send_status_channel(sock, NULL); - if (ret < 0) { - /* Stop everything if session daemon can not be notified. */ - goto error_fatal; + { + int ret_send_status; + + ret_send_status = consumer_send_status_channel(sock, NULL); + if (ret_send_status < 0) { + /* Stop everything if session daemon can not be notified. */ + goto error_fatal; + } } - ret = 1; + + ret_func = 1; goto end; error_fatal: /* This will issue a consumer stop. */ - ret = -1; + ret_func = -1; goto end; end: rcu_read_unlock(); health_code_update(); - return ret; + return ret_func; } -void lttng_ustctl_flush_buffer(struct lttng_consumer_stream *stream, +void lttng_lttng_ust_ctl_flush_buffer(struct lttng_consumer_stream *stream, int producer_active) { assert(stream); assert(stream->ustream); - ustctl_flush_buffer(stream->ustream, producer_active); + lttng_ust_ctl_flush_buffer(stream->ustream, producer_active); } /* @@ -2279,7 +2333,7 @@ int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream) assert(stream); assert(stream->ustream); - return ustctl_snapshot(stream->ustream); + return lttng_ust_ctl_snapshot(stream->ustream); } /* @@ -2293,7 +2347,7 @@ int lttng_ustconsumer_sample_snapshot_positions( assert(stream); assert(stream->ustream); - return ustctl_snapshot_sample_positions(stream->ustream); + return lttng_ust_ctl_snapshot_sample_positions(stream->ustream); } /* @@ -2308,7 +2362,7 @@ int lttng_ustconsumer_get_produced_snapshot( assert(stream->ustream); assert(pos); - return ustctl_snapshot_get_produced(stream->ustream, pos); + return lttng_ust_ctl_snapshot_get_produced(stream->ustream, pos); } /* @@ -2323,7 +2377,7 @@ int lttng_ustconsumer_get_consumed_snapshot( assert(stream->ustream); assert(pos); - return ustctl_snapshot_get_consumed(stream->ustream, pos); + return lttng_ust_ctl_snapshot_get_consumed(stream->ustream, pos); } void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream, @@ -2332,7 +2386,7 @@ void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream, assert(stream); assert(stream->ustream); - ustctl_flush_buffer(stream->ustream, producer); + lttng_ust_ctl_flush_buffer(stream->ustream, producer); } void lttng_ustconsumer_clear_buffer(struct lttng_consumer_stream *stream) @@ -2340,7 +2394,7 @@ void lttng_ustconsumer_clear_buffer(struct lttng_consumer_stream *stream) assert(stream); assert(stream->ustream); - ustctl_clear_buffer(stream->ustream); + lttng_ust_ctl_clear_buffer(stream->ustream); } int lttng_ustconsumer_get_current_timestamp( @@ -2350,7 +2404,7 @@ int lttng_ustconsumer_get_current_timestamp( assert(stream->ustream); assert(ts); - return ustctl_get_current_timestamp(stream->ustream, ts); + return lttng_ust_ctl_get_current_timestamp(stream->ustream, ts); } int lttng_ustconsumer_get_sequence_number( @@ -2360,7 +2414,7 @@ int lttng_ustconsumer_get_sequence_number( assert(stream->ustream); assert(seq); - return ustctl_get_sequence_number(stream->ustream, seq); + return lttng_ust_ctl_get_sequence_number(stream->ustream, seq); } /* @@ -2373,7 +2427,7 @@ void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream) pthread_mutex_lock(&stream->lock); if (!stream->quiescent) { - ustctl_flush_buffer(stream->ustream, 0); + lttng_ust_ctl_flush_buffer(stream->ustream, 0); stream->quiescent = true; } pthread_mutex_unlock(&stream->lock); @@ -2424,7 +2478,7 @@ void lttng_ustconsumer_free_channel(struct lttng_consumer_channel *chan) assert(chan->buffer_credentials.is_set); consumer_metadata_cache_destroy(chan); - ustctl_destroy_channel(chan->uchan); + lttng_ust_ctl_destroy_channel(chan->uchan); /* Try to rmdir all directories under shm_path root. */ if (chan->root_shm_path[0]) { (void) run_as_rmdir_recursive(chan->root_shm_path, @@ -2445,7 +2499,7 @@ void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream) if (stream->chan->switch_timer_enabled == 1) { consumer_timer_switch_stop(stream->chan); } - ustctl_destroy_stream(stream->ustream); + lttng_ust_ctl_destroy_stream(stream->ustream); } int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream) @@ -2453,7 +2507,7 @@ int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream) assert(stream); assert(stream->ustream); - return ustctl_stream_get_wakeup_fd(stream->ustream); + return lttng_ust_ctl_stream_get_wakeup_fd(stream->ustream); } int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream) @@ -2461,16 +2515,7 @@ int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream) assert(stream); assert(stream->ustream); - return ustctl_stream_close_wakeup_fd(stream->ustream); -} - -static -void metadata_stream_reset_cache_consumed_position( - struct lttng_consumer_stream *stream) -{ - DBG("Reset metadata cache of session %" PRIu64, - stream->chan->session_id); - stream->ust_metadata_pushed = 0; + return lttng_ust_ctl_stream_close_wakeup_fd(stream->ustream); } /* @@ -2486,8 +2531,8 @@ int commit_one_metadata_packet(struct lttng_consumer_stream *stream) int ret; pthread_mutex_lock(&stream->chan->metadata_cache->lock); - if (stream->chan->metadata_cache->max_offset == - stream->ust_metadata_pushed) { + if (stream->chan->metadata_cache->contents.size == + stream->ust_metadata_pushed) { /* * In the context of a user space metadata channel, a * change in version can be detected in two ways: @@ -2523,10 +2568,10 @@ int commit_one_metadata_packet(struct lttng_consumer_stream *stream) } } - write_len = ustctl_write_one_packet_to_channel(stream->chan->uchan, - &stream->chan->metadata_cache->data[stream->ust_metadata_pushed], - stream->chan->metadata_cache->max_offset - - stream->ust_metadata_pushed); + write_len = lttng_ust_ctl_write_one_packet_to_channel(stream->chan->uchan, + &stream->chan->metadata_cache->contents.data[stream->ust_metadata_pushed], + stream->chan->metadata_cache->contents.size - + stream->ust_metadata_pushed); assert(write_len != 0); if (write_len < 0) { ERR("Writing one metadata packet"); @@ -2535,7 +2580,7 @@ int commit_one_metadata_packet(struct lttng_consumer_stream *stream) } stream->ust_metadata_pushed += write_len; - assert(stream->chan->metadata_cache->max_offset >= + assert(stream->chan->metadata_cache->contents.size >= stream->ust_metadata_pushed); ret = write_len; @@ -2544,7 +2589,7 @@ int commit_one_metadata_packet(struct lttng_consumer_stream *stream) * a metadata packet. Since the subbuffer is fully filled (with padding, * if needed), the stream is "quiescent" after this commit. */ - ustctl_flush_buffer(stream->ustream, 1); + lttng_ust_ctl_flush_buffer(stream->ustream, 1); stream->quiescent = true; end: pthread_mutex_unlock(&stream->chan->metadata_cache->lock); @@ -2615,7 +2660,7 @@ enum sync_metadata_status lttng_ustconsumer_sync_metadata( goto end; } - ret = ustctl_snapshot(metadata_stream->ustream); + ret = lttng_ust_ctl_snapshot(metadata_stream->ustream); if (ret < 0) { ERR("Failed to take a snapshot of the metadata ring-buffer positions, ret = %d", ret); status = SYNC_METADATA_STATUS_ERROR; @@ -2633,7 +2678,7 @@ static int notify_if_more_data(struct lttng_consumer_stream *stream, struct lttng_consumer_local_data *ctx) { int ret; - struct ustctl_consumer_stream *ustream; + struct lttng_ust_ctl_consumer_stream *ustream; assert(stream); assert(ctx); @@ -2645,7 +2690,7 @@ static int notify_if_more_data(struct lttng_consumer_stream *stream, * before reading the stream wait_fd. */ /* Get the next subbuffer */ - ret = ustctl_get_next_subbuf(ustream); + ret = lttng_ust_ctl_get_next_subbuf(ustream); if (ret) { /* No more data found, flag the stream. */ stream->has_data = 0; @@ -2653,7 +2698,7 @@ static int notify_if_more_data(struct lttng_consumer_stream *stream, goto end; } - ret = ustctl_put_subbuf(ustream); + ret = lttng_ust_ctl_put_subbuf(ustream); assert(!ret); /* This stream still has data. Flag it and wake up the data thread. */ @@ -2710,13 +2755,13 @@ static int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, { int ret; - ret = ustctl_get_subbuf_size( + ret = lttng_ust_ctl_get_subbuf_size( stream->ustream, &subbuf->info.data.subbuf_size); if (ret) { goto end; } - ret = ustctl_get_padded_subbuf_size( + ret = lttng_ust_ctl_get_padded_subbuf_size( stream->ustream, &subbuf->info.data.padded_subbuf_size); if (ret) { goto end; @@ -2752,42 +2797,42 @@ static int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, goto end; } - ret = ustctl_get_packet_size( + ret = lttng_ust_ctl_get_packet_size( stream->ustream, &subbuf->info.data.packet_size); if (ret < 0) { PERROR("Failed to get sub-buffer packet size"); goto end; } - ret = ustctl_get_content_size( + ret = lttng_ust_ctl_get_content_size( stream->ustream, &subbuf->info.data.content_size); if (ret < 0) { PERROR("Failed to get sub-buffer content size"); goto end; } - ret = ustctl_get_timestamp_begin( + ret = lttng_ust_ctl_get_timestamp_begin( stream->ustream, &subbuf->info.data.timestamp_begin); if (ret < 0) { PERROR("Failed to get sub-buffer begin timestamp"); goto end; } - ret = ustctl_get_timestamp_end( + ret = lttng_ust_ctl_get_timestamp_end( stream->ustream, &subbuf->info.data.timestamp_end); if (ret < 0) { PERROR("Failed to get sub-buffer end timestamp"); goto end; } - ret = ustctl_get_events_discarded( + ret = lttng_ust_ctl_get_events_discarded( stream->ustream, &subbuf->info.data.events_discarded); if (ret) { PERROR("Failed to get sub-buffer events discarded count"); goto end; } - ret = ustctl_get_sequence_number(stream->ustream, + ret = lttng_ust_ctl_get_sequence_number(stream->ustream, &subbuf->info.data.sequence_number.value); if (ret) { /* May not be supported by older LTTng-modules. */ @@ -2799,14 +2844,14 @@ static int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, subbuf->info.data.sequence_number.is_set = true; } - ret = ustctl_get_stream_id( + ret = lttng_ust_ctl_get_stream_id( stream->ustream, &subbuf->info.data.stream_id); if (ret < 0) { PERROR("Failed to get stream id"); goto end; } - ret = ustctl_get_instance_id(stream->ustream, + ret = lttng_ust_ctl_get_instance_id(stream->ustream, &subbuf->info.data.stream_instance_id.value); if (ret) { /* May not be supported by older LTTng-modules. */ @@ -2845,25 +2890,45 @@ end: return ret; } -static int get_next_subbuffer(struct lttng_consumer_stream *stream, +static enum get_next_subbuffer_status get_next_subbuffer( + struct lttng_consumer_stream *stream, struct stream_subbuffer *subbuffer) { int ret; + enum get_next_subbuffer_status status; - ret = ustctl_get_next_subbuf(stream->ustream); - if (ret) { + ret = lttng_ust_ctl_get_next_subbuf(stream->ustream); + switch (ret) { + case 0: + status = GET_NEXT_SUBBUFFER_STATUS_OK; + break; + case -ENODATA: + case -EAGAIN: + /* + * The caller only expects -ENODATA when there is no data to + * read, but the kernel tracer returns -EAGAIN when there is + * currently no data for a non-finalized stream, and -ENODATA + * when there is no data for a finalized stream. Those can be + * combined into a -ENODATA return value. + */ + status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; + goto end; + default: + status = GET_NEXT_SUBBUFFER_STATUS_ERROR; goto end; } ret = get_next_subbuffer_common(stream, subbuffer); if (ret) { + status = GET_NEXT_SUBBUFFER_STATUS_ERROR; goto end; } end: - return ret; + return status; } -static int get_next_subbuffer_metadata(struct lttng_consumer_stream *stream, +static enum get_next_subbuffer_status get_next_subbuffer_metadata( + struct lttng_consumer_stream *stream, struct stream_subbuffer *subbuffer) { int ret; @@ -2872,15 +2937,17 @@ static int get_next_subbuffer_metadata(struct lttng_consumer_stream *stream, bool coherent; bool buffer_empty; unsigned long consumed_pos, produced_pos; + enum get_next_subbuffer_status status; do { - ret = ustctl_get_next_subbuf(stream->ustream); + ret = lttng_ust_ctl_get_next_subbuf(stream->ustream); if (ret == 0) { got_subbuffer = true; } else { got_subbuffer = false; if (ret != -EAGAIN) { /* Fatal error. */ + status = GET_NEXT_SUBBUFFER_STATUS_ERROR; goto end; } } @@ -2892,19 +2959,20 @@ static int get_next_subbuffer_metadata(struct lttng_consumer_stream *stream, if (!got_subbuffer) { ret = commit_one_metadata_packet(stream); if (ret < 0 && ret != -ENOBUFS) { + status = GET_NEXT_SUBBUFFER_STATUS_ERROR; goto end; } else if (ret == 0) { /* Not an error, the cache is empty. */ cache_empty = true; - ret = -ENODATA; + status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; goto end; } else { cache_empty = false; } } else { pthread_mutex_lock(&stream->chan->metadata_cache->lock); - cache_empty = stream->chan->metadata_cache->max_offset == - stream->ust_metadata_pushed; + cache_empty = stream->chan->metadata_cache->contents.size == + stream->ust_metadata_pushed; pthread_mutex_unlock(&stream->chan->metadata_cache->lock); } } while (!got_subbuffer); @@ -2912,6 +2980,7 @@ static int get_next_subbuffer_metadata(struct lttng_consumer_stream *stream, /* Populate sub-buffer infos and view. */ ret = get_next_subbuffer_common(stream, subbuffer); if (ret) { + status = GET_NEXT_SUBBUFFER_STATUS_ERROR; goto end; } @@ -2922,18 +2991,21 @@ static int get_next_subbuffer_metadata(struct lttng_consumer_stream *stream, * pushed the consumption position yet (on put_next). */ PERROR("Failed to take a snapshot of metadata buffer positions"); + status = GET_NEXT_SUBBUFFER_STATUS_ERROR; goto end; } ret = lttng_ustconsumer_get_consumed_snapshot(stream, &consumed_pos); if (ret) { PERROR("Failed to get metadata consumed position"); + status = GET_NEXT_SUBBUFFER_STATUS_ERROR; goto end; } ret = lttng_ustconsumer_get_produced_snapshot(stream, &produced_pos); if (ret) { PERROR("Failed to get metadata produced position"); + status = GET_NEXT_SUBBUFFER_STATUS_ERROR; goto end; } @@ -2949,14 +3021,15 @@ static int get_next_subbuffer_metadata(struct lttng_consumer_stream *stream, coherent = got_subbuffer && cache_empty && buffer_empty; LTTNG_OPTIONAL_SET(&subbuffer->info.metadata.coherent, coherent); + status = GET_NEXT_SUBBUFFER_STATUS_OK; end: - return ret; + return status; } static int put_next_subbuffer(struct lttng_consumer_stream *stream, struct stream_subbuffer *subbuffer) { - const int ret = ustctl_put_next_subbuf(stream->ustream); + const int ret = lttng_ust_ctl_put_next_subbuf(stream->ustream); assert(ret == 0); return ret; @@ -3051,6 +3124,7 @@ int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream) assert(stream); assert(stream->ustream); + ASSERT_LOCKED(stream->lock); DBG("UST consumer checking data pending"); @@ -3064,7 +3138,7 @@ int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream) /* Ease our life a bit. */ pthread_mutex_lock(&stream->chan->metadata_cache->lock); - contiguous = stream->chan->metadata_cache->max_offset; + contiguous = stream->chan->metadata_cache->contents.size; pthread_mutex_unlock(&stream->chan->metadata_cache->lock); pushed = stream->ust_metadata_pushed; @@ -3087,13 +3161,13 @@ int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream) goto end; } } else { - ret = ustctl_get_next_subbuf(stream->ustream); + ret = lttng_ust_ctl_get_next_subbuf(stream->ustream); if (ret == 0) { /* * There is still data so let's put back this * subbuffer. */ - ret = ustctl_put_subbuf(stream->ustream); + ret = lttng_ust_ctl_put_subbuf(stream->ustream); assert(ret == 0); ret = 1; /* Data is pending */ goto end; @@ -3183,7 +3257,7 @@ void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream) { int ret; - ret = ustctl_stream_close_wakeup_fd(stream->ustream); + ret = lttng_ust_ctl_stream_close_wakeup_fd(stream->ustream); if (ret < 0) { ERR("Unable to close wakeup fd"); } @@ -3214,7 +3288,7 @@ int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx, memset(&request, 0, sizeof(request)); /* send the metadata request to sessiond */ - switch (consumer_data.type) { + switch (the_consumer_data.type) { case LTTNG_CONSUMER64_UST: request.bits_per_long = 64; break; @@ -3334,5 +3408,5 @@ int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream, assert(stream); assert(stream_id); - return ustctl_get_stream_id(stream->ustream, stream_id); + return lttng_ust_ctl_get_stream_id(stream->ustream, stream_id); }