#include <formats/ctf/events-private.h>
#include "lttng-live-functions.h"
-#include "lttng-viewer.h"
+#include "lttng-viewer-abi.h"
/*
* Memory allocation zeroed
((type) (a) > (type) (b) ? (type) (a) : (type) (b))
#endif
+void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index,
+ int whence);
+static void add_traces(gpointer key, gpointer value, gpointer user_data);
+static int del_traces(gpointer key, gpointer value, gpointer user_data);
+
int lttng_live_connect_viewer(struct lttng_live_ctx *ctx, char *hostname,
int port)
{
goto end;
}
- ctx->session->stream_count = be32toh(rp.streams_count);
+ ctx->session->stream_count += be32toh(rp.streams_count);
/*
* When the session is created but not started, we do an active wait
* until it starts. It allows the viewer to start processing the trace
return ret;
}
+static
+int ask_new_streams(struct lttng_live_ctx *ctx)
+{
+ int i, ret = 0;
+ uint64_t id;
+
+restart:
+ for (i = 0; i < ctx->session_ids->len; i++) {
+ id = g_array_index(ctx->session_ids, uint64_t, i);
+ ret = lttng_live_get_new_streams(ctx, id);
+ printf_verbose("Asking for new streams returns %d\n",
+ ret);
+ if (ret < 0) {
+ if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) {
+ printf_verbose("Session %" PRIu64 " closed\n",
+ id);
+ g_array_remove_index(ctx->session_ids, i);
+ /*
+ * We can't continue iterating on the g_array
+ * after a remove, we have to start again.
+ */
+ goto restart;
+ } else {
+ ret = -1;
+ goto end;
+ }
+ }
+ }
+
+end:
+ return ret;
+}
+
static
int get_data_packet(struct lttng_live_ctx *ctx,
struct ctf_stream_pos *pos,
ret = 0;
goto end;
}
+ if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) {
+ ret = ask_new_streams(ctx);
+ if (ret < 0)
+ goto error;
+ g_hash_table_foreach(ctx->session->ctf_traces, add_traces,
+ ctx->bt_ctx);
+ }
fprintf(stderr, "[error] get_data_packet: error\n");
ret = -1;
goto end;
goto error;
}
}
+ if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) {
+ ret = ask_new_streams(ctx);
+ if (ret < 0)
+ goto error;
+ g_hash_table_foreach(ctx->session->ctf_traces, add_traces,
+ ctx->bt_ctx);
+ }
break;
case LTTNG_VIEWER_INDEX_RETRY:
printf_verbose("get_next_index: retry\n");
viewer_stream->id = -1ULL;
viewer_stream->fd = -1;
index->offset = EOF;
+ ctx->session->stream_count--;
break;
case LTTNG_VIEWER_INDEX_ERR:
fprintf(stderr, "[error] get_next_index: error\n");
{
struct ctf_stream_pos *pos;
struct ctf_file_stream *file_stream;
- struct packet_index packet_index;
+ struct packet_index *prev_index = NULL, *cur_index;
struct lttng_live_viewer_stream *viewer_stream;
struct lttng_live_session *session;
int ret;
viewer_stream = (struct lttng_live_viewer_stream *) pos->priv;
session = viewer_stream->session;
+ switch (pos->packet_index->len) {
+ case 0:
+ g_array_set_size(pos->packet_index, 1);
+ cur_index = &g_array_index(pos->packet_index,
+ struct packet_index, 0);
+ break;
+ case 1:
+ g_array_set_size(pos->packet_index, 2);
+ prev_index = &g_array_index(pos->packet_index,
+ struct packet_index, 0);
+ cur_index = &g_array_index(pos->packet_index,
+ struct packet_index, 1);
+ break;
+ case 2:
+ g_array_index(pos->packet_index,
+ struct packet_index, 0) =
+ g_array_index(pos->packet_index,
+ struct packet_index, 1);
+ prev_index = &g_array_index(pos->packet_index,
+ struct packet_index, 0);
+ cur_index = &g_array_index(pos->packet_index,
+ struct packet_index, 1);
+ break;
+ default:
+ abort();
+ break;
+ }
printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id);
- ret = get_next_index(session->ctx, viewer_stream, &packet_index);
+ ret = get_next_index(session->ctx, viewer_stream, cur_index);
if (ret < 0) {
pos->offset = EOF;
fprintf(stderr, "[error] get_next_index failed\n");
return;
}
- pos->packet_size = packet_index.packet_size;
- pos->content_size = packet_index.content_size;
+ pos->packet_size = cur_index->packet_size;
+ pos->content_size = cur_index->content_size;
pos->mmap_base_offset = 0;
- if (packet_index.offset == EOF) {
+ if (cur_index->offset == EOF) {
pos->offset = EOF;
} else {
pos->offset = 0;
}
- if (packet_index.content_size == 0) {
- file_stream->parent.cycles_timestamp = packet_index.ts_cycles.timestamp_end;
+ if (cur_index->content_size == 0) {
+ file_stream->parent.cycles_timestamp =
+ cur_index->ts_cycles.timestamp_end;
file_stream->parent.real_timestamp = ctf_get_real_timestamp(
- &file_stream->parent, packet_index.ts_cycles.timestamp_end);
+ &file_stream->parent,
+ cur_index->ts_cycles.timestamp_end);
} else {
- file_stream->parent.cycles_timestamp = packet_index.ts_cycles.timestamp_begin;
- file_stream->parent.real_timestamp = ctf_get_real_timestamp(
- &file_stream->parent, packet_index.ts_cycles.timestamp_begin);
+ /* Convert the timestamps and append to the real_index. */
+ cur_index->ts_real.timestamp_begin = ctf_get_real_timestamp(
+ &file_stream->parent,
+ cur_index->ts_cycles.timestamp_begin);
+ cur_index->ts_real.timestamp_end = ctf_get_real_timestamp(
+ &file_stream->parent,
+ cur_index->ts_cycles.timestamp_end);
+
+ ctf_update_current_packet_index(&file_stream->parent,
+ prev_index, cur_index);
+
+ file_stream->parent.cycles_timestamp =
+ cur_index->ts_cycles.timestamp_begin;
+ file_stream->parent.real_timestamp =
+ cur_index->ts_real.timestamp_begin;
}
if (pos->packet_size == 0 || pos->offset == EOF) {
printf_verbose("get_data_packet for stream %" PRIu64 "\n",
viewer_stream->id);
ret = get_data_packet(session->ctx, pos, viewer_stream,
- be64toh(packet_index.offset),
- packet_index.packet_size / CHAR_BIT);
+ be64toh(cur_index->offset),
+ cur_index->packet_size / CHAR_BIT);
if (ret == -2) {
goto retry;
} else if (ret < 0) {
printf_verbose("Index received : packet_size : %" PRIu64
", offset %" PRIu64 ", content_size %" PRIu64
", timestamp_end : %" PRIu64 "\n",
- packet_index.packet_size, packet_index.offset,
- packet_index.content_size,
- packet_index.ts_cycles.timestamp_end);
+ cur_index->packet_size, cur_index->offset,
+ cur_index->content_size,
+ cur_index->ts_cycles.timestamp_end);
/* update trace_packet_header and stream_packet_context */
if (pos->prot != PROT_WRITE && file_stream->parent.trace_packet_header) {
return;
}
-static int del_traces(gpointer key, gpointer value, gpointer user_data)
+int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx)
+{
+ struct lttng_viewer_cmd cmd;
+ struct lttng_viewer_create_session_response resp;
+ int ret;
+ ssize_t ret_len;
+
+ cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION);
+ cmd.data_size = 0;
+ cmd.cmd_version = 0;
+
+ do {
+ ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending cmd\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(cmd));
+
+ do {
+ ret_len = recv(ctx->control_sock, &resp, sizeof(resp), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving create session reply\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(resp));
+
+ if (be32toh(resp.status) != LTTNG_VIEWER_CREATE_SESSION_OK) {
+ fprintf(stderr, "[error] Error creating viewer session\n");
+ ret = -1;
+ goto error;
+ }
+ ret = 0;
+
+error:
+ return ret;
+}
+
+static
+int del_traces(gpointer key, gpointer value, gpointer user_data)
{
struct bt_context *bt_ctx = user_data;
struct lttng_live_ctf_trace *trace = value;
return 1;
}
-static void add_traces(gpointer key, gpointer value, gpointer user_data)
+static
+void add_traces(gpointer key, gpointer value, gpointer user_data)
{
int i, ret, total_metadata = 0;
uint64_t metadata_len;
struct bt_mmap_stream_list mmap_list;
struct lttng_live_ctx *ctx = NULL;
+ if (trace->in_use)
+ return;
+
BT_INIT_LIST_HEAD(&mmap_list.head);
for (i = 0; i < trace->streams->len; i++) {
fprintf(stderr, "[error] Error adding trace\n");
goto end_free;
}
+
+ if (bt_ctx->current_iterator) {
+ struct bt_trace_descriptor *td;
+ struct bt_trace_handle *handle;
+
+ handle = (struct bt_trace_handle *) g_hash_table_lookup(
+ bt_ctx->trace_handles,
+ (gpointer) (unsigned long) ret);
+ td = handle->td;
+ fprintf(stderr, "Handle : %d, td : %p\n", ret, td);
+ bt_iter_add_trace(bt_ctx->current_iterator, td);
+ }
+
trace->trace_id = ret;
+ trace->in_use = 1;
goto end;
return;
}
-void lttng_live_read(struct lttng_live_ctx *ctx, uint64_t session_id)
+int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id)
+{
+ struct lttng_viewer_cmd cmd;
+ struct lttng_viewer_new_streams_request rq;
+ struct lttng_viewer_new_streams_response rp;
+ struct lttng_viewer_stream stream;
+ int ret, i;
+ ssize_t ret_len;
+
+ cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS);
+ cmd.data_size = sizeof(rq);
+ cmd.cmd_version = 0;
+
+ memset(&rq, 0, sizeof(rq));
+ rq.session_id = htobe64(id);
+
+ do {
+ ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending cmd\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(cmd));
+
+ do {
+ ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error sending attach request\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rq));
+
+ do {
+ ret_len = recv(ctx->control_sock, &rp, sizeof(rp), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving get_new_streams response\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(rp));
+
+ switch(be32toh(rp.status)) {
+ case LTTNG_VIEWER_NEW_STREAMS_OK:
+ break;
+ case LTTNG_VIEWER_NEW_STREAMS_NO_NEW:
+ ret = 0;
+ goto end;
+ case LTTNG_VIEWER_NEW_STREAMS_HUP:
+ ret = -LTTNG_VIEWER_NEW_STREAMS_HUP;
+ goto end;
+ case LTTNG_VIEWER_NEW_STREAMS_ERR:
+ fprintf(stderr, "[error] get_new_streams error\n");
+ ret = -1;
+ goto end;
+ default:
+ fprintf(stderr, "[error] Unknown return code %u\n",
+ be32toh(rp.status));
+ ret = -1;
+ goto end;
+ }
+
+ ctx->session->stream_count += be32toh(rp.streams_count);
+ /*
+ * When the session is created but not started, we do an active wait
+ * until it starts. It allows the viewer to start processing the trace
+ * as soon as the session starts.
+ */
+ if (ctx->session->stream_count == 0) {
+ ret = 0;
+ goto end;
+ }
+ printf_verbose("Waiting for %" PRIu64 " streams:\n",
+ ctx->session->stream_count);
+ ctx->session->streams = g_new0(struct lttng_live_viewer_stream,
+ ctx->session->stream_count);
+ for (i = 0; i < be32toh(rp.streams_count); i++) {
+ do {
+ ret_len = recv(ctx->control_sock, &stream, sizeof(stream), 0);
+ } while (ret_len < 0 && errno == EINTR);
+ if (ret_len < 0) {
+ fprintf(stderr, "[error] Error receiving stream\n");
+ ret = ret_len;
+ goto error;
+ }
+ assert(ret_len == sizeof(stream));
+ stream.path_name[LTTNG_VIEWER_PATH_MAX - 1] = '\0';
+ stream.channel_name[LTTNG_VIEWER_NAME_MAX - 1] = '\0';
+
+ printf_verbose(" stream %" PRIu64 " : %s/%s\n",
+ be64toh(stream.id), stream.path_name,
+ stream.channel_name);
+ ctx->session->streams[i].id = be64toh(stream.id);
+ ctx->session->streams[i].session = ctx->session;
+
+ ctx->session->streams[i].first_read = 1;
+ ctx->session->streams[i].mmap_size = 0;
+
+ if (be32toh(stream.metadata_flag)) {
+ char *path;
+
+ path = strdup(LTTNG_METADATA_PATH_TEMPLATE);
+ if (!path) {
+ perror("strdup");
+ ret = -1;
+ goto error;
+ }
+ if (!mkdtemp(path)) {
+ perror("mkdtemp");
+ free(path);
+ ret = -1;
+ goto error;
+ }
+ ctx->session->streams[i].metadata_flag = 1;
+ snprintf(ctx->session->streams[i].path,
+ sizeof(ctx->session->streams[i].path),
+ "%s/%s", path,
+ stream.channel_name);
+ ret = open(ctx->session->streams[i].path,
+ O_WRONLY | O_CREAT | O_TRUNC,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+ if (ret < 0) {
+ perror("open");
+ free(path);
+ goto error;
+ }
+ ctx->session->streams[i].fd = ret;
+ free(path);
+ }
+ ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i],
+ be64toh(stream.ctf_trace_id));
+ if (ret < 0) {
+ goto error;
+ }
+
+ }
+ ret = 0;
+
+end:
+error:
+ return ret;
+}
+
+void lttng_live_read(struct lttng_live_ctx *ctx)
{
- int ret, active_session = 0;
- struct bt_context *bt_ctx;
+ int ret, i;
struct bt_ctf_iter *iter;
const struct bt_ctf_event *event;
struct bt_iter_pos begin_pos;
struct bt_trace_descriptor *td_write;
struct bt_format *fmt_write;
struct ctf_text_stream_pos *sout;
+ uint64_t id;
- bt_ctx = bt_context_create();
- if (!bt_ctx) {
+ ctx->bt_ctx = bt_context_create();
+ if (!ctx->bt_ctx) {
fprintf(stderr, "[error] bt_context_create allocation\n");
goto end;
}
if (!sout->parent.event_cb)
goto end_free;
+ ret = lttng_live_create_viewer_session(ctx);
+ if (ret < 0) {
+ goto end_free;
+ }
+
+ for (i = 0; i < ctx->session_ids->len; i++) {
+ id = g_array_index(ctx->session_ids, uint64_t, i);
+ printf_verbose("Attaching to session %lu\n", id);
+ ret = lttng_live_attach_session(ctx, id);
+ printf_verbose("Attaching session returns %d\n", ret);
+ if (ret < 0) {
+ if (ret == -LTTNG_VIEWER_ATTACH_UNK) {
+ fprintf(stderr, "[error] Unknown session ID\n");
+ }
+ goto end_free;
+ }
+ }
+
/*
- * As long as the session is active, we try to reattach to it,
- * even if all the streams get closed.
+ * As long as the session is active, we try to get new streams.
*/
- do {
+ for (;;) {
int flags;
- do {
- ret = lttng_live_attach_session(ctx, session_id);
- printf_verbose("Attaching session returns %d\n", ret);
- if (ret < 0) {
- if (ret == -LTTNG_VIEWER_ATTACH_UNK) {
- if (active_session)
- goto end_free;
- fprintf(stderr, "[error] Unknown "
- "session ID\n");
- }
+ while (!ctx->session->stream_count) {
+ if (ctx->session_ids->len == 0)
goto end_free;
- } else {
- active_session = 1;
- }
- } while (ctx->session->stream_count == 0);
+ ret = ask_new_streams(ctx);
+ if (ret < 0)
+ goto end_free;
+ }
- g_hash_table_foreach(ctx->session->ctf_traces, add_traces, bt_ctx);
+ g_hash_table_foreach(ctx->session->ctf_traces, add_traces,
+ ctx->bt_ctx);
begin_pos.type = BT_SEEK_BEGIN;
- iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
+ iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL);
if (!iter) {
fprintf(stderr, "[error] Iterator creation error\n");
goto end;
}
}
bt_ctf_iter_destroy(iter);
- g_hash_table_foreach_remove(ctx->session->ctf_traces, del_traces, bt_ctx);
- } while (active_session);
+ g_hash_table_foreach_remove(ctx->session->ctf_traces,
+ del_traces, ctx->bt_ctx);
+ ctx->session->stream_count = 0;
+ }
end_free:
- bt_context_put(bt_ctx);
+ bt_context_put(ctx->bt_ctx);
end:
return;
}
projects / babeltrace.git / blobdiff