#include <netinet/in.h>
#include <netdb.h>
#include <stdio.h>
-#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <inttypes.h>
#include <fcntl.h>
-#include <sys/mman.h>
#include <poll.h>
#include <babeltrace/ctf/ctf-index.h>
#include <babeltrace/babeltrace.h>
+#include <babeltrace/endian.h>
#include <babeltrace/ctf/events.h>
#include <babeltrace/ctf/callbacks.h>
#include <babeltrace/ctf/iterator.h>
#include <formats/ctf/events-private.h>
#include <babeltrace/compat/memstream.h>
+#include <babeltrace/compat/send.h>
+#include <babeltrace/compat/string.h>
+#include <babeltrace/compat/mman.h>
#include "lttng-live.h"
#include "lttng-viewer-abi.h"
static 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 add_traces(struct lttng_live_ctx *ctx);
static int del_traces(gpointer key, gpointer value, gpointer user_data);
static int get_new_metadata(struct lttng_live_ctx *ctx,
struct lttng_live_viewer_stream *viewer_stream,
ssize_t ret;
do {
- ret = send(fd, buf, len, MSG_NOSIGNAL);
+ ret = bt_send_nosigpipe(fd, buf, len);
} while (ret < 0 && errno == EINTR);
return ret;
}
struct sockaddr_in server_addr;
int ret;
- host = gethostbyname(ctx->relay_hostname);
- if (!host) {
+ if (lttng_live_should_quit()) {
ret = -1;
goto end;
}
+ host = gethostbyname(ctx->relay_hostname);
+ if (!host) {
+ fprintf(stderr, "[error] Cannot lookup hostname %s\n",
+ ctx->relay_hostname);
+ goto error;
+ }
+
if ((ctx->control_sock = socket(AF_INET, SOCK_STREAM, 0)) == -1) {
perror("Socket");
- ret = -1;
- goto end;
+ goto error;
}
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(ctx->port);
server_addr.sin_addr = *((struct in_addr *) host->h_addr);
- bzero(&(server_addr.sin_zero), 8);
+ memset(&(server_addr.sin_zero), 0, 8);
if (connect(ctx->control_sock, (struct sockaddr *) &server_addr,
sizeof(struct sockaddr)) == -1) {
perror("Connect");
- ret = -1;
- goto end;
+ goto error;
}
ret = 0;
end:
return ret;
+
+error:
+ fprintf(stderr, "[error] Connection failed\n");
+ return -1;
}
int lttng_live_establish_connection(struct lttng_live_ctx *ctx)
{
struct lttng_viewer_cmd cmd;
struct lttng_viewer_connect connect;
+ const size_t cmd_buf_len = sizeof(cmd) + sizeof(connect);
+ char cmd_buf[cmd_buf_len];
int ret;
ssize_t ret_len;
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
+ }
+
cmd.cmd = htobe32(LTTNG_VIEWER_CONNECT);
- cmd.data_size = sizeof(connect);
- cmd.cmd_version = 0;
+ cmd.data_size = htobe64((uint64_t) sizeof(connect));
+ cmd.cmd_version = htobe32(0);
connect.viewer_session_id = -1ULL; /* will be set on recv */
connect.major = htobe32(LTTNG_LIVE_MAJOR);
connect.minor = htobe32(LTTNG_LIVE_MINOR);
connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND);
- ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd));
- if (ret_len < 0) {
- perror("[error] Error sending cmd");
- ret = ret_len;
- goto error;
- }
- assert(ret_len == sizeof(cmd));
+ /*
+ * Merge the cmd and connection request to prevent a write-write
+ * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
+ * second write to be performed quickly in presence of Nagle's algorithm.
+ */
+ memcpy(cmd_buf, &cmd, sizeof(cmd));
+ memcpy(cmd_buf + sizeof(cmd), &connect, sizeof(connect));
- ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect));
+ ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len);
if (ret_len < 0) {
- perror("[error] Error sending version");
- ret = ret_len;
+ perror("[error] Error sending cmd for establishing session");
goto error;
}
- assert(ret_len == sizeof(connect));
+ assert(ret_len == cmd_buf_len);
ret_len = lttng_live_recv(ctx->control_sock, &connect, sizeof(connect));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving version");
- ret = ret_len;
goto error;
}
assert(ret_len == sizeof(connect));
printf_verbose("Relayd version : %u.%u\n", be32toh(connect.major),
be32toh(connect.minor));
+ if (LTTNG_LIVE_MAJOR != be32toh(connect.major)) {
+ fprintf(stderr, "[error] Incompatible lttng-relayd protocol\n");
+ goto error;
+ }
+ /* Use the smallest protocol version implemented. */
+ if (LTTNG_LIVE_MINOR > be32toh(connect.minor)) {
+ ctx->minor = be32toh(connect.minor);
+ } else {
+ ctx->minor = LTTNG_LIVE_MINOR;
+ }
+ ctx->major = LTTNG_LIVE_MAJOR;
ret = 0;
+end:
+ return ret;
error:
- return ret;
+ fprintf(stderr, "[error] Unable to establish connection\n");
+ return -1;
}
static
for (i = 0; i < session_list->len; i++) {
relay_session = g_ptr_array_index(session_list, i);
- fprintf(stdout, "%s/host/%s/%s (timer = %u, "
+ fprintf(LTTNG_LIVE_OUTPUT_FP, "%s/host/%s/%s (timer = %u, "
"%u stream(s), %u client(s) connected)\n",
path, relay_session->hostname,
relay_session->name, relay_session->timer,
for (i = 0; i < session_list->len; i++) {
relay_session = g_ptr_array_index(session_list, i);
- if ((strncmp(relay_session->hostname, hostname, NAME_MAX) == 0) &&
+ if ((strncmp(relay_session->hostname, hostname, MAXNAMLEN) == 0) &&
strncmp(relay_session->name,
- session_name, NAME_MAX) == 0) {
+ session_name, MAXNAMLEN) == 0) {
relay_session->streams += streams;
if (relay_session->clients < clients)
relay_session->clients = clients;
return;
relay_session = g_new0(struct lttng_live_relay_session, 1);
- relay_session->hostname = strndup(hostname, NAME_MAX);
- relay_session->name = strndup(session_name, NAME_MAX);
+ relay_session->hostname = bt_strndup(hostname, MAXNAMLEN);
+ relay_session->name = bt_strndup(session_name, MAXNAMLEN);
relay_session->clients = clients;
relay_session->streams = streams;
relay_session->timer = timer;
uint64_t session_id;
GPtrArray *session_list = NULL;
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
+ }
+
if (strlen(ctx->session_name) == 0) {
print_list = 1;
session_list = g_ptr_array_new();
}
cmd.cmd = htobe32(LTTNG_VIEWER_LIST_SESSIONS);
- cmd.data_size = 0;
- cmd.cmd_version = 0;
+ cmd.data_size = htobe64((uint64_t) 0);
+ cmd.cmd_version = htobe32(0);
ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd));
if (ret_len < 0) {
perror("[error] Error sending cmd");
- ret = ret_len;
goto error;
}
assert(ret_len == sizeof(cmd));
ret_len = lttng_live_recv(ctx->control_sock, &list, sizeof(list));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving session list");
- ret = ret_len;
goto error;
}
assert(ret_len == sizeof(list));
ret_len = lttng_live_recv(ctx->control_sock, &lsession, sizeof(lsession));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving session");
- ret = ret_len;
goto error;
}
assert(ret_len == sizeof(lsession));
be32toh(lsession.live_timer));
} else {
if ((strncmp(lsession.session_name, ctx->session_name,
- NAME_MAX) == 0) && (strncmp(lsession.hostname,
- ctx->traced_hostname, NAME_MAX) == 0)) {
+ MAXNAMLEN) == 0) && (strncmp(lsession.hostname,
+ ctx->traced_hostname, MAXNAMLEN) == 0)) {
printf_verbose("Reading from session %" PRIu64 "\n",
session_id);
g_array_append_val(ctx->session_ids,
print_session_list(session_list, path);
free_session_list(session_list);
}
-
ret = 0;
+end:
+ return ret;
error:
- return ret;
+ fprintf(stderr, "[error] Unable to list sessions\n");
+ return -1;
}
int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream,
int ret = 0;
trace = g_hash_table_lookup(stream->session->ctf_traces,
- (gpointer) ctf_trace_id);
+ &ctf_trace_id);
if (!trace) {
trace = g_new0(struct lttng_live_ctf_trace, 1);
trace->ctf_trace_id = ctf_trace_id;
trace->streams = g_ptr_array_new();
g_hash_table_insert(stream->session->ctf_traces,
- (gpointer) ctf_trace_id,
+ &trace->ctf_trace_id,
trace);
}
if (stream->metadata_flag)
struct lttng_viewer_attach_session_request rq;
struct lttng_viewer_attach_session_response rp;
struct lttng_viewer_stream stream;
+ const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq);
+ char cmd_buf[cmd_buf_len];
int ret, i;
ssize_t ret_len;
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
+ }
+
cmd.cmd = htobe32(LTTNG_VIEWER_ATTACH_SESSION);
- cmd.data_size = sizeof(rq);
- cmd.cmd_version = 0;
+ cmd.data_size = htobe64((uint64_t) sizeof(rq));
+ cmd.cmd_version = htobe32(0);
memset(&rq, 0, sizeof(rq));
rq.session_id = htobe64(id);
// rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING);
rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST);
- ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd));
- if (ret_len < 0) {
- perror("[error] Error sending cmd");
- ret = ret_len;
- goto error;
- }
- assert(ret_len == sizeof(cmd));
+ /*
+ * Merge the cmd and connection request to prevent a write-write
+ * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
+ * second write to be performed quickly in presence of Nagle's algorithm.
+ */
+ memcpy(cmd_buf, &cmd, sizeof(cmd));
+ memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq));
- ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq));
+ ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len);
if (ret_len < 0) {
- perror("[error] Error sending attach request");
- ret = ret_len;
+ perror("[error] Error sending attach command and request");
goto error;
}
- assert(ret_len == sizeof(rq));
+ assert(ret_len == cmd_buf_len);
ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving attach response");
- ret = ret_len;
goto error;
}
assert(ret_len == sizeof(rp));
goto end;
case LTTNG_VIEWER_ATTACH_ALREADY:
fprintf(stderr, "[error] There is already a viewer attached to this session\n");
- ret = -1;
- goto end;
+ goto error;
case LTTNG_VIEWER_ATTACH_NOT_LIVE:
fprintf(stderr, "[error] Not a live session\n");
- ret = -1;
- goto end;
+ goto error;
case LTTNG_VIEWER_ATTACH_SEEK_ERR:
fprintf(stderr, "[error] Wrong seek parameter\n");
- ret = -1;
- goto end;
+ goto error;
default:
fprintf(stderr, "[error] Unknown attach return code %u\n",
be32toh(rp.status));
- ret = -1;
- goto end;
+ goto error;
}
if (be32toh(rp.status) != LTTNG_VIEWER_ATTACH_OK) {
- ret = -1;
- goto end;
+ goto error;
}
ctx->session->stream_count += be32toh(rp.streams_count);
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);
+ printf_verbose("Waiting for %d streams:\n",
+ be32toh(rp.streams_count));
for (i = 0; i < be32toh(rp.streams_count); i++) {
- ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream));
+ struct lttng_live_viewer_stream *lvstream;
+
+ lvstream = g_new0(struct lttng_live_viewer_stream, 1);
+ ret_len = lttng_live_recv(ctx->control_sock, &stream,
+ sizeof(stream));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
+ g_free(lvstream);
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving stream");
- ret = ret_len;
+ g_free(lvstream);
goto error;
}
assert(ret_len == sizeof(stream));
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;
+ lvstream->id = be64toh(stream.id);
+ lvstream->session = ctx->session;
- ctx->session->streams[i].first_read = 1;
- ctx->session->streams[i].mmap_size = 0;
+ lvstream->mmap_size = 0;
+ lvstream->ctf_stream_id = -1ULL;
if (be32toh(stream.metadata_flag)) {
- ctx->session->streams[i].metadata_flag = 1;
+ lvstream->metadata_flag = 1;
}
- ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i],
+ ret = lttng_live_ctf_trace_assign(lvstream,
be64toh(stream.ctf_trace_id));
if (ret < 0) {
+ g_free(lvstream);
goto error;
}
-
+ bt_list_add(&lvstream->stream_node,
+ &ctx->session->stream_list);
}
ret = 0;
-
end:
-error:
return ret;
+
+error:
+ return -1;
}
+/*
+ * Ask the relay for new streams.
+ *
+ * Returns the number of new streams received or a negative value on error.
+ */
static
int ask_new_streams(struct lttng_live_ctx *ctx)
{
- int i, ret = 0;
+ int i, ret = 0, nb_streams = 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);
+ printf_verbose("Asking for new streams returns %d\n", ret);
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
+ }
if (ret < 0) {
if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) {
printf_verbose("Session %" PRIu64 " closed\n",
ret = -1;
goto end;
}
+ } else {
+ nb_streams += ret;
}
}
+ if (ctx->session_ids->len == 0) {
+ /* All sessions are closed. */
+ ret = -1;
+ } else {
+ ret = nb_streams;
+ }
end:
return ret;
struct lttng_live_viewer_stream *metadata;
char *metadata_buf = NULL;
+ if (!viewer_stream->ctf_trace->handle) {
+ printf_verbose("append_metadata: trace handle not ready yet.\n");
+ return 0;
+ }
+
printf_verbose("get_next_index: new metadata needed\n");
ret = get_new_metadata(ctx, viewer_stream, &metadata_buf);
if (ret < 0) {
struct lttng_viewer_cmd cmd;
struct lttng_viewer_get_packet rq;
struct lttng_viewer_trace_packet rp;
+ const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq);
+ char cmd_buf[cmd_buf_len];
ssize_t ret_len;
int ret;
retry:
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
+ }
+
cmd.cmd = htobe32(LTTNG_VIEWER_GET_PACKET);
- cmd.data_size = sizeof(rq);
- cmd.cmd_version = 0;
+ cmd.data_size = htobe64((uint64_t) sizeof(rq));
+ cmd.cmd_version = htobe32(0);
memset(&rq, 0, sizeof(rq));
rq.stream_id = htobe64(stream->id);
- /* Already in big endian. */
- rq.offset = offset;
+ rq.offset = htobe64(offset);
rq.len = htobe32(len);
- ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd));
- if (ret_len < 0) {
- perror("[error] Error sending cmd");
- ret = ret_len;
- goto error;
- }
- assert(ret_len == sizeof(cmd));
+ /*
+ * Merge the cmd and connection request to prevent a write-write
+ * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
+ * second write to be performed quickly in presence of Nagle's algorithm.
+ */
+ memcpy(cmd_buf, &cmd, sizeof(cmd));
+ memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq));
- ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq));
+ ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len);
if (ret_len < 0) {
- perror("[error] Error sending get_data_packet request");
- ret = ret_len;
+ perror("[error] Error sending get_data_packet cmd and request");
goto error;
}
- assert(ret_len == sizeof(rq));
+ assert(ret_len == cmd_buf_len);
ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving data response");
- ret = ret_len;
goto error;
}
if (ret_len != sizeof(rp)) {
- fprintf(stderr, "[error] get_data_packet: expected %" PRId64
- ", received %" PRId64 "\n", sizeof(rp),
+ fprintf(stderr, "[error] get_data_packet: expected %zu"
+ ", received %zd\n", sizeof(rp),
ret_len);
- ret = -1;
goto error;
}
"\n", len);
break;
case LTTNG_VIEWER_GET_PACKET_RETRY:
+ /* Unimplemented by relay daemon */
printf_verbose("get_data_packet: retry\n");
- ret = -1;
- goto end;
+ goto error;
case LTTNG_VIEWER_GET_PACKET_ERR:
if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
printf_verbose("get_data_packet: new metadata needed\n");
if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) {
printf_verbose("get_data_packet: new streams needed\n");
ret = ask_new_streams(ctx);
- if (ret < 0)
+ if (ret < 0) {
goto error;
- g_hash_table_foreach(ctx->session->ctf_traces,
- add_traces, ctx->bt_ctx);
+ } else if (ret > 0) {
+ ret = add_traces(ctx);
+ if (ret < 0) {
+ goto error;
+ }
+ }
}
if (rp.flags & (LTTNG_VIEWER_FLAG_NEW_METADATA
| LTTNG_VIEWER_FLAG_NEW_STREAM)) {
goto retry;
}
fprintf(stderr, "[error] get_data_packet: error\n");
- ret = -1;
- goto end;
+ goto error;
case LTTNG_VIEWER_GET_PACKET_EOF:
ret = -2;
- goto error;
+ goto end;
default:
printf_verbose("get_data_packet: unknown\n");
- assert(0);
- ret = -1;
- goto end;
+ goto error;
}
- if (len <= 0) {
- ret = -1;
- goto end;
+ if (len == 0) {
+ goto error;
}
if (len > stream->mmap_size) {
ret = munmap_align(pos->base_mma);
if (ret) {
perror("[error] Unable to unmap old base");
- ret = -1;
goto error;
}
pos->base_mma = NULL;
if (pos->base_mma == MAP_FAILED) {
perror("[error] mmap error");
pos->base_mma = NULL;
- ret = -1;
goto error;
}
mmap_align_addr(pos->base_mma), len);
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving trace packet");
- ret = ret_len;
goto error;
}
assert(ret_len == len);
ret = 0;
end:
-error:
return ret;
+
+error:
+ return -1;
}
static
struct lttng_viewer_metadata_packet rp;
char *data = NULL;
ssize_t ret_len;
+ const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq);
+ char cmd_buf[cmd_buf_len];
+
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
+ }
rq.stream_id = htobe64(metadata_stream->id);
cmd.cmd = htobe32(LTTNG_VIEWER_GET_METADATA);
- cmd.data_size = sizeof(rq);
- cmd.cmd_version = 0;
+ cmd.data_size = htobe64((uint64_t) sizeof(rq));
+ cmd.cmd_version = htobe32(0);
- ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd));
- if (ret_len < 0) {
- perror("[error] Error sending cmd");
- ret = ret_len;
- goto error;
- }
- assert(ret_len == sizeof(cmd));
+ /*
+ * Merge the cmd and connection request to prevent a write-write
+ * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
+ * second write to be performed quickly in presence of Nagle's algorithm.
+ */
+ memcpy(cmd_buf, &cmd, sizeof(cmd));
+ memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq));
- ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq));
+ ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len);
if (ret_len < 0) {
- perror("[error] Error sending get_metadata request");
- ret = ret_len;
+ perror("[error] Error sending get_metadata cmd and request");
goto error;
}
- assert(ret_len == sizeof(rq));
+ assert(ret_len == cmd_buf_len);
ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving metadata response");
- ret = ret_len;
goto error;
}
assert(ret_len == sizeof(rp));
goto end;
case LTTNG_VIEWER_METADATA_ERR:
printf_verbose("get_metadata : ERR\n");
- ret = -1;
- goto end;
+ goto error;
default:
printf_verbose("get_metadata : UNKNOWN\n");
- ret = -1;
- goto end;
+ goto error;
}
len = be64toh(rp.len);
printf_verbose("Writing %" PRIu64" bytes to metadata\n", len);
if (len <= 0) {
- ret = -1;
- goto end;
+ goto error;
}
data = zmalloc(len);
if (!data) {
perror("relay data zmalloc");
- ret = -1;
goto error;
}
ret_len = lttng_live_recv(ctx->control_sock, data, len);
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
- free(data);
- goto error;
+ goto error_free_data;
}
if (ret_len < 0) {
perror("[error] Error receiving trace packet");
- ret = ret_len;
- free(data);
- goto error;
+ goto error_free_data;
}
assert(ret_len == len);
} while (ret_len < 0 && errno == EINTR);
if (ret_len < 0) {
fprintf(stderr, "[error] Writing in the metadata fp\n");
- free(data);
- ret = ret_len;
- goto error;
+ goto error_free_data;
}
assert(ret_len == len);
metadata_stream->metadata_len += len;
+ free(data);
ret = len;
+end:
+ return ret;
+error_free_data:
free(data);
-
-end:
error:
- return ret;
+ return -1;
}
/*
{
int ret = 0;
struct lttng_live_viewer_stream *metadata_stream;
- size_t size, len_read = 0;;
+ size_t size, len_read = 0;
metadata_stream = viewer_stream->ctf_trace->metadata_stream;
if (!metadata_stream) {
}
do {
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto error;
+ }
/*
* get_one_metadata_packet returns the number of bytes
* received, 0 when we have received everything, a
if (!len_read) {
(void) poll(NULL, 0, ACTIVE_POLL_DELAY);
}
+ if (ret < 0) {
+ break; /* Stop on error. */
+ }
} while (ret > 0 || !len_read);
- if (fclose(metadata_stream->metadata_fp_write))
- perror("fclose");
+ if (babeltrace_close_memstream(metadata_buf, &size,
+ metadata_stream->metadata_fp_write)) {
+ perror("babeltrace_close_memstream");
+ }
metadata_stream->metadata_fp_write = NULL;
error:
return ret;
}
+/*
+ * Assign the fields from a lttng_viewer_index to a packet_index.
+ */
+static
+void lttng_index_to_packet_index(struct lttng_viewer_index *lindex,
+ struct packet_index *pindex)
+{
+ assert(lindex);
+ assert(pindex);
+
+ pindex->offset = be64toh(lindex->offset);
+ pindex->packet_size = be64toh(lindex->packet_size);
+ pindex->content_size = be64toh(lindex->content_size);
+ pindex->ts_cycles.timestamp_begin = be64toh(lindex->timestamp_begin);
+ pindex->ts_cycles.timestamp_end = be64toh(lindex->timestamp_end);
+ pindex->events_discarded = be64toh(lindex->events_discarded);
+}
+
/*
* Get one index for a stream.
*
static
int get_next_index(struct lttng_live_ctx *ctx,
struct lttng_live_viewer_stream *viewer_stream,
- struct packet_index *index)
+ struct packet_index *index, uint64_t *stream_id)
{
struct lttng_viewer_cmd cmd;
struct lttng_viewer_get_next_index rq;
- struct lttng_viewer_index rp;
int ret;
ssize_t ret_len;
+ struct lttng_viewer_index *rp = &viewer_stream->current_index;
+ const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq);
+ char cmd_buf[cmd_buf_len];
cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX);
- cmd.data_size = sizeof(rq);
- cmd.cmd_version = 0;
+ cmd.data_size = htobe64((uint64_t) sizeof(rq));
+ cmd.cmd_version = htobe32(0);
memset(&rq, 0, sizeof(rq));
rq.stream_id = htobe64(viewer_stream->id);
+ /*
+ * Merge the cmd and connection request to prevent a write-write
+ * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
+ * second write to be performed quickly in presence of Nagle's algorithm.
+ */
+ memcpy(cmd_buf, &cmd, sizeof(cmd));
+ memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq));
retry:
- ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd));
- if (ret_len < 0) {
- perror("[error] Error sending cmd");
- ret = ret_len;
- goto error;
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
}
- assert(ret_len == sizeof(cmd));
-
- ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq));
+ ret_len = lttng_live_send(ctx->control_sock, &cmd_buf, cmd_buf_len);
if (ret_len < 0) {
- perror("[error] Error sending get_next_index request");
- ret = ret_len;
+ perror("[error] Error sending get_next_index cmd and request");
goto error;
}
- assert(ret_len == sizeof(rq));
+ assert(ret_len == cmd_buf_len);
- ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp));
+ ret_len = lttng_live_recv(ctx->control_sock, rp, sizeof(*rp));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving index response");
- ret = ret_len;
goto error;
}
- assert(ret_len == sizeof(rp));
+ assert(ret_len == sizeof(*rp));
- rp.flags = be32toh(rp.flags);
+ rp->flags = be32toh(rp->flags);
- switch (be32toh(rp.status)) {
+ switch (be32toh(rp->status)) {
case LTTNG_VIEWER_INDEX_INACTIVE:
printf_verbose("get_next_index: inactive\n");
+
+ if (index->ts_cycles.timestamp_end ==
+ be64toh(rp->timestamp_end)) {
+ /* Already seen this timestamp. */
+ (void) poll(NULL, 0, ACTIVE_POLL_DELAY);
+ }
+
memset(index, 0, sizeof(struct packet_index));
- index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end);
+ index->ts_cycles.timestamp_end = be64toh(rp->timestamp_end);
+ *stream_id = be64toh(rp->stream_id);
break;
case LTTNG_VIEWER_INDEX_OK:
printf_verbose("get_next_index: Ok, need metadata update : %u\n",
- rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA);
- index->offset = be64toh(rp.offset);
- index->packet_size = be64toh(rp.packet_size);
- index->content_size = be64toh(rp.content_size);
- index->ts_cycles.timestamp_begin = be64toh(rp.timestamp_begin);
- index->ts_cycles.timestamp_end = be64toh(rp.timestamp_end);
- index->events_discarded = be64toh(rp.events_discarded);
+ rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA);
+ lttng_index_to_packet_index(rp, index);
+ *stream_id = be64toh(rp->stream_id);
+ viewer_stream->data_pending = 1;
- if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
+ if (rp->flags & LTTNG_VIEWER_FLAG_NEW_METADATA) {
ret = append_metadata(ctx, viewer_stream);
if (ret)
goto error;
}
- if (rp.flags & LTTNG_VIEWER_FLAG_NEW_STREAM) {
+ if (rp->flags & LTTNG_VIEWER_FLAG_NEW_STREAM) {
+ printf_verbose("get_next_index: need new streams\n");
ret = ask_new_streams(ctx);
- if (ret < 0)
+ if (ret < 0) {
goto error;
- g_hash_table_foreach(ctx->session->ctf_traces,
- add_traces, ctx->bt_ctx);
+ } else if (ret > 0) {
+ ret = add_traces(ctx);
+ if (ret < 0) {
+ goto error;
+ }
+ }
}
break;
case LTTNG_VIEWER_INDEX_RETRY:
goto retry;
case LTTNG_VIEWER_INDEX_HUP:
printf_verbose("get_next_index: stream hung up\n");
+ /* TODO: remove stream from session list and trace ptr array */
viewer_stream->id = -1ULL;
index->offset = EOF;
ctx->session->stream_count--;
break;
case LTTNG_VIEWER_INDEX_ERR:
fprintf(stderr, "[error] get_next_index: error\n");
- ret = -1;
goto error;
default:
fprintf(stderr, "[error] get_next_index: unkwown value\n");
- ret = -1;
goto error;
}
-
ret = 0;
+end:
+ return ret;
error:
+ return -1;
+}
+
+static
+void read_packet_header(struct ctf_stream_pos *pos,
+ struct ctf_file_stream *file_stream)
+{
+ int ret;
+
+ /* update trace_packet_header and stream_packet_context */
+ if (!(pos->prot & PROT_WRITE) &&
+ file_stream->parent.trace_packet_header) {
+ /* Read packet header */
+ ret = generic_rw(&pos->parent,
+ &file_stream->parent.trace_packet_header->p);
+ if (ret) {
+ pos->offset = EOF;
+ fprintf(stderr, "[error] trace packet "
+ "header read failed\n");
+ goto end;
+ }
+ }
+ if (!(pos->prot & PROT_WRITE) &&
+ file_stream->parent.stream_packet_context) {
+ /* Read packet context */
+ ret = generic_rw(&pos->parent,
+ &file_stream->parent.stream_packet_context->p);
+ if (ret) {
+ pos->offset = EOF;
+ fprintf(stderr, "[error] stream packet "
+ "context read failed\n");
+ goto end;
+ }
+ }
+ pos->data_offset = pos->offset;
+
+end:
+ return;
+}
+
+/*
+ * Handle the seek parameters.
+ * Returns 0 if the packet_seek can continue, a positive value to
+ * cleanly exit the packet_seek, a negative value on error.
+ */
+static
+int handle_seek_position(size_t index, int whence,
+ struct lttng_live_viewer_stream *viewer_stream,
+ struct ctf_stream_pos *pos,
+ struct ctf_file_stream *file_stream)
+{
+ int ret = 0;
+
+ switch (whence) {
+ case SEEK_CUR:
+ ret = 0;
+ goto end;
+ case SEEK_SET:
+ /*
+ * We only allow to seek to 0.
+ */
+ if (index != 0) {
+ fprintf(stderr, "[error] Arbitrary seek in lttng-live "
+ "trace not supported\n");
+ pos->offset = EOF;
+ ret = -1;
+ goto end;
+ }
+
+ ret = 0;
+ goto end;
+
+ default:
+ fprintf(stderr, "[error] Invalid seek parameter\n");
+ assert(0);
+ }
+
+end:
return ret;
}
struct packet_index *prev_index = NULL, *cur_index;
struct lttng_live_viewer_stream *viewer_stream;
struct lttng_live_session *session;
+ uint64_t stream_id = -1ULL;
int ret;
-retry:
pos = ctf_pos(stream_pos);
file_stream = container_of(pos, struct ctf_file_stream, pos);
viewer_stream = (struct lttng_live_viewer_stream *) pos->priv;
session = viewer_stream->session;
+ ret = handle_seek_position(index, whence, viewer_stream, pos,
+ file_stream);
+ if (ret != 0) {
+ return;
+ }
+
+retry:
switch (pos->packet_index->len) {
case 0:
g_array_set_size(pos->packet_index, 1);
abort();
break;
}
- printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id);
- ret = get_next_index(session->ctx, viewer_stream, cur_index);
- if (ret < 0) {
- pos->offset = EOF;
- fprintf(stderr, "[error] get_next_index failed\n");
+
+ if (viewer_stream->data_pending) {
+ lttng_index_to_packet_index(&viewer_stream->current_index, cur_index);
+ } else {
+ printf_verbose("get_next_index for stream %" PRIu64 "\n", viewer_stream->id);
+ ret = get_next_index(session->ctx, viewer_stream, cur_index, &stream_id);
+ if (ret < 0) {
+ pos->offset = EOF;
+ if (!lttng_live_should_quit()) {
+ fprintf(stderr, "[error] get_next_index failed\n");
+ }
+ return;
+ }
+ printf_verbose("Index received : packet_size : %" PRIu64
+ ", offset %" PRIu64 ", content_size %" PRIu64
+ ", timestamp_end : %" PRIu64 "\n",
+ cur_index->packet_size, cur_index->offset,
+ cur_index->content_size,
+ cur_index->ts_cycles.timestamp_end);
+
+ }
+
+ /*
+ * On the first time we receive an index, the stream_id needs to
+ * be set for the stream in order to use it, we don't want any
+ * data at this stage.
+ */
+ if (file_stream->parent.stream_id == -1ULL) {
+ /*
+ * Warning: with lttng-tools < 2.4.2, the beacon does not
+ * contain the real stream ID, it is memset to 0, so this
+ * might create a problem when a session has multiple
+ * channels. We can't detect it at this stage, lttng-tools
+ * has to be upgraded to fix this problem.
+ */
+ printf_verbose("Assigning stream_id %" PRIu64 "\n",
+ stream_id);
+ file_stream->parent.stream_id = stream_id;
+ viewer_stream->ctf_stream_id = stream_id;
+
return;
}
}
if (cur_index->content_size == 0) {
- file_stream->parent.cycles_timestamp =
+ /* Beacon packet index */
+ if (file_stream->parent.stream_class) {
+ file_stream->parent.cycles_timestamp =
cur_index->ts_cycles.timestamp_end;
- file_stream->parent.real_timestamp = ctf_get_real_timestamp(
- &file_stream->parent,
- cur_index->ts_cycles.timestamp_end);
+ file_stream->parent.real_timestamp = ctf_get_real_timestamp(
+ &file_stream->parent,
+ cur_index->ts_cycles.timestamp_end);
+
+ /*
+ * Duplicate the data from the previous index, because
+ * the one we just received is only a beacon with no
+ * relevant information except the timestamp_end. We
+ * don't need to keep this timestamp_end because we already
+ * updated the file_stream timestamps, so we only need
+ * to keep the last real index data as prev_index. That
+ * way, we keep the original prev timestamps and
+ * discarded events counter. This is the same behaviour
+ * as if we were reading a local trace, we would not
+ * have fake indexes between real indexes.
+ */
+ memcpy(cur_index, prev_index, sizeof(struct packet_index));
+ }
} else {
- /* 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);
+ /* Real packet index */
+ if (file_stream->parent.stream_class) {
+ /* 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);
+ /*
+ * We need to check if we are in trace read or called
+ * from packet indexing. In this last case, the
+ * collection is not there, so we cannot print the
+ * timestamps.
+ */
+ if ((&file_stream->parent)->stream_class->trace->parent.collection) {
+ ctf_print_discarded_lost(stderr, &file_stream->parent);
+ }
+
file_stream->parent.cycles_timestamp =
cur_index->ts_cycles.timestamp_begin;
file_stream->parent.real_timestamp =
cur_index->ts_real.timestamp_begin;
}
+ /*
+ * Flush the output between attempts to grab a packet, thus
+ * ensuring we flush at least at the periodical timer period.
+ * This ensures the output remains reactive for interactive users and
+ * that the output is flushed when redirected to a file by the shell.
+ */
+ if (fflush(LTTNG_LIVE_OUTPUT_FP) < 0) {
+ perror("fflush");
+ goto end;
+ }
+
if (pos->packet_size == 0 || pos->offset == EOF) {
goto end;
}
printf_verbose("get_data_packet for stream %" PRIu64 "\n",
viewer_stream->id);
ret = get_data_packet(session->ctx, pos, viewer_stream,
- be64toh(cur_index->offset),
+ cur_index->offset,
cur_index->packet_size / CHAR_BIT);
if (ret == -2) {
goto retry;
} else if (ret < 0) {
pos->offset = EOF;
- fprintf(stderr, "[error] get_data_packet failed\n");
+ if (!lttng_live_should_quit()) {
+ fprintf(stderr, "[error] get_data_packet failed\n");
+ }
return;
}
+ viewer_stream->data_pending = 0;
- printf_verbose("Index received : packet_size : %" PRIu64
- ", offset %" PRIu64 ", content_size %" PRIu64
- ", timestamp_end : %" PRIu64 "\n",
- 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) {
- /* Read packet header */
- ret = generic_rw(&pos->parent, &file_stream->parent.trace_packet_header->p);
- if (ret) {
- pos->offset = EOF;
- fprintf(stderr, "[error] trace packet header read failed\n");
- goto end;
- }
- }
- if (pos->prot != PROT_WRITE && file_stream->parent.stream_packet_context) {
- /* Read packet context */
- ret = generic_rw(&pos->parent, &file_stream->parent.stream_packet_context->p);
- if (ret) {
- pos->offset = EOF;
- fprintf(stderr, "[error] stream packet context read failed\n");
- goto end;
- }
- }
- pos->data_offset = pos->offset;
+ read_packet_header(pos, file_stream);
end:
return;
int ret;
ssize_t ret_len;
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
+ }
+
cmd.cmd = htobe32(LTTNG_VIEWER_CREATE_SESSION);
- cmd.data_size = 0;
- cmd.cmd_version = 0;
+ cmd.data_size = htobe64((uint64_t) 0);
+ cmd.cmd_version = htobe32(0);
ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd));
if (ret_len < 0) {
perror("[error] Error sending cmd");
- ret = ret_len;
goto error;
}
assert(ret_len == sizeof(cmd));
ret_len = lttng_live_recv(ctx->control_sock, &resp, sizeof(resp));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving create session reply");
- 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;
+end:
+ return ret;
error:
- return ret;
+ return -1;
}
static
}
static
-void add_traces(gpointer key, gpointer value, gpointer user_data)
+int add_one_trace(struct lttng_live_ctx *ctx,
+ struct lttng_live_ctf_trace *trace)
{
int i, ret;
- struct bt_context *bt_ctx = user_data;
- struct lttng_live_ctf_trace *trace = value;
+ struct bt_context *bt_ctx = ctx->bt_ctx;
struct lttng_live_viewer_stream *stream;
struct bt_mmap_stream *new_mmap_stream;
struct bt_mmap_stream_list mmap_list;
- struct lttng_live_ctx *ctx = NULL;
struct bt_trace_descriptor *td;
struct bt_trace_handle *handle;
* times the same traces.
* If a trace is already in the context, we just skip this function.
*/
- if (trace->in_use)
- return;
+ if (trace->in_use) {
+ ret = 0;
+ goto end;
+ }
BT_INIT_LIST_HEAD(&mmap_list.head);
for (i = 0; i < trace->streams->len; i++) {
stream = g_ptr_array_index(trace->streams, i);
- ctx = stream->session->ctx;
if (!stream->metadata_flag) {
new_mmap_stream = zmalloc(sizeof(struct bt_mmap_stream));
if (!trace->metadata_fp) {
fprintf(stderr, "[error] No metadata stream opened\n");
+ ret = -1;
goto end_free;
}
ctf_live_packet_seek, &mmap_list, trace->metadata_fp);
if (ret < 0) {
fprintf(stderr, "[error] Error adding trace\n");
+ ret = -1;
goto end_free;
}
trace->metadata_stream->metadata_len = 0;
end_free:
bt_context_put(bt_ctx);
end:
- return;
+ return ret;
+}
+
+static
+int add_traces(struct lttng_live_ctx *ctx)
+{
+ int ret;
+ struct lttng_live_ctf_trace *trace;
+ GHashTableIter it;
+ gpointer key;
+ gpointer value;
+
+ g_hash_table_iter_init(&it, ctx->session->ctf_traces);
+ while (g_hash_table_iter_next(&it, &key, &value)) {
+ trace = (struct lttng_live_ctf_trace *) value;
+ ret = add_one_trace(ctx, trace);
+ if (ret < 0) {
+ goto end;
+ }
+ }
+
+ ret = 0;
+
+end:
+ return ret;
}
+/*
+ * Request new streams for a session.
+ * Returns the number of streams received or a negative value on error.
+ */
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;
+ int ret, i, nb_streams = 0;
ssize_t ret_len;
uint32_t stream_count;
+ const size_t cmd_buf_len = sizeof(cmd) + sizeof(rq);
+ char cmd_buf[cmd_buf_len];
+
+ if (lttng_live_should_quit()) {
+ ret = -1;
+ goto end;
+ }
cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEW_STREAMS);
- cmd.data_size = sizeof(rq);
- cmd.cmd_version = 0;
+ cmd.data_size = htobe64((uint64_t) sizeof(rq));
+ cmd.cmd_version = htobe32(0);
memset(&rq, 0, sizeof(rq));
rq.session_id = htobe64(id);
- ret_len = lttng_live_send(ctx->control_sock, &cmd, sizeof(cmd));
- if (ret_len < 0) {
- perror("[error] Error sending cmd");
- ret = ret_len;
- goto error;
- }
- assert(ret_len == sizeof(cmd));
+ /*
+ * Merge the cmd and connection request to prevent a write-write
+ * sequence on the TCP socket. Otherwise, a delayed ACK will prevent the
+ * second write to be performed quickly in presence of Nagle's algorithm.
+ */
+ memcpy(cmd_buf, &cmd, sizeof(cmd));
+ memcpy(cmd_buf + sizeof(cmd), &rq, sizeof(rq));
- ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq));
+ ret_len = lttng_live_send(ctx->control_sock, cmd_buf, cmd_buf_len);
if (ret_len < 0) {
- perror("[error] Error sending get_new_streams request");
- ret = ret_len;
+ perror("[error] Error sending get_new_streams cmd and request");
goto error;
}
- assert(ret_len == sizeof(rq));
+ assert(ret_len == cmd_buf_len);
ret_len = lttng_live_recv(ctx->control_sock, &rp, sizeof(rp));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving get_new_streams response");
- ret = ret_len;
goto error;
}
assert(ret_len == sizeof(rp));
goto end;
case LTTNG_VIEWER_NEW_STREAMS_ERR:
fprintf(stderr, "[error] get_new_streams error\n");
- ret = -1;
- goto end;
+ goto error;
default:
fprintf(stderr, "[error] Unknown return code %u\n",
be32toh(rp.status));
- ret = -1;
- goto end;
+ goto error;
}
stream_count = be32toh(rp.streams_count);
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);
+ printf_verbose("Waiting for %d streams:\n", stream_count);
+
for (i = 0; i < stream_count; i++) {
- ret_len = lttng_live_recv(ctx->control_sock, &stream, sizeof(stream));
+ struct lttng_live_viewer_stream *lvstream;
+
+ lvstream = g_new0(struct lttng_live_viewer_stream, 1);
+ ret_len = lttng_live_recv(ctx->control_sock, &stream,
+ sizeof(stream));
if (ret_len == 0) {
fprintf(stderr, "[error] Remote side has closed connection\n");
- ret = -1;
+ g_free(lvstream);
goto error;
}
if (ret_len < 0) {
perror("[error] Error receiving stream");
- ret = ret_len;
+ g_free(lvstream);
goto error;
}
assert(ret_len == sizeof(stream));
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;
+ lvstream->id = be64toh(stream.id);
+ lvstream->session = ctx->session;
- ctx->session->streams[i].first_read = 1;
- ctx->session->streams[i].mmap_size = 0;
+ lvstream->mmap_size = 0;
+ lvstream->ctf_stream_id = -1ULL;
if (be32toh(stream.metadata_flag)) {
- ctx->session->streams[i].metadata_flag = 1;
+ lvstream->metadata_flag = 1;
}
- ret = lttng_live_ctf_trace_assign(&ctx->session->streams[i],
+ ret = lttng_live_ctf_trace_assign(lvstream,
be64toh(stream.ctf_trace_id));
if (ret < 0) {
+ g_free(lvstream);
goto error;
}
-
+ nb_streams++;
+ bt_list_add(&lvstream->stream_node,
+ &ctx->session->stream_list);
}
- ret = 0;
-
+ ret = nb_streams;
end:
-error:
return ret;
+
+error:
+ return -1;
}
-void lttng_live_read(struct lttng_live_ctx *ctx)
+int lttng_live_read(struct lttng_live_ctx *ctx)
{
- int ret, i;
+ int ret = -1;
+ int i;
struct bt_ctf_iter *iter;
const struct bt_ctf_event *event;
struct bt_iter_pos begin_pos;
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);
+ printf_verbose("Attaching to session %" PRIu64 "\n", id);
ret = lttng_live_attach_session(ctx, id);
printf_verbose("Attaching session returns %d\n", ret);
if (ret < 0) {
for (;;) {
int flags;
+ if (lttng_live_should_quit()) {
+ ret = 0;
+ goto end_free;
+ }
+
while (!ctx->session->stream_count) {
- if (ctx->session_ids->len == 0) {
+ if (lttng_live_should_quit()
+ || ctx->session_ids->len == 0) {
+ ret = 0;
goto end_free;
}
ret = ask_new_streams(ctx);
if (ret < 0) {
+ ret = 0;
goto end_free;
}
if (!ctx->session->stream_count) {
}
}
- g_hash_table_foreach(ctx->session->ctf_traces, add_traces,
- ctx->bt_ctx);
+ ret = add_traces(ctx);
+ if (ret < 0) {
+ goto end_free;
+ }
begin_pos.type = BT_SEEK_BEGIN;
iter = bt_ctf_iter_create(ctx->bt_ctx, &begin_pos, NULL);
if (!iter) {
+ if (lttng_live_should_quit()) {
+ ret = 0;
+ goto end;
+ }
fprintf(stderr, "[error] Iterator creation error\n");
goto end;
}
for (;;) {
+ if (lttng_live_should_quit()) {
+ ret = 0;
+ goto end_free;
+ }
event = bt_ctf_iter_read_event_flags(iter, &flags);
if (!(flags & BT_ITER_FLAG_RETRY)) {
if (!event) {
end_free:
bt_context_put(ctx->bt_ctx);
end:
- return;
+ if (lttng_live_should_quit()) {
+ ret = 0;
+ }
+ return ret;
}
projects / babeltrace.git / blobdiff