From: Julien Desfossez Date: Sun, 12 Oct 2014 01:29:28 +0000 (-0400) Subject: Fix lttngtop live X-Git-Tag: v0.3~17 X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=6c5f6d078cb396329be3be226a0fbd2b7c28dc77;p=lttngtop.git Fix lttngtop live Babeltrace v1.2.0 minimum required now Signed-off-by: Julien Desfossez --- diff --git a/src/Makefile.am b/src/Makefile.am index 9719ee0..86c8ccb 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1,4 +1,4 @@ -AM_CFLAGS = $(PACKAGE_CFLAGS) -I$(top_srcdir)/lib -DBABELTRACE_HAVE_LIBUUID +AM_CFLAGS = $(PACKAGE_CFLAGS) -I$(top_srcdir)/lib -DBABELTRACE_HAVE_LIBUUID -DBABELTRACE_HAVE_FMEMOPEN -DBABELTRACE_HAVE_OPEN_MEMSTREAM lib_LTLIBRARIES = libbabeltrace-lttngtop-live.la diff --git a/src/lttng-live-comm.c b/src/lttng-live-comm.c index ffa2912..de84f8d 100644 --- a/src/lttng-live-comm.c +++ b/src/lttng-live-comm.c @@ -33,6 +33,7 @@ #include #include #include +#include #include @@ -47,6 +48,8 @@ #include #include #include +#include +#include /* #include replaced with @@ -57,6 +60,8 @@ replaced with #include "lttng-live-comm.h" #include "lttng-viewer-abi.h" +#define ACTIVE_POLL_DELAY 100 /* ms */ + /* * Memory allocation zeroed */ @@ -71,6 +76,41 @@ 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 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, + char **metadata_buf); + +static +ssize_t lttng_live_recv(int fd, void *buf, size_t len) +{ + ssize_t ret; + size_t copied = 0, to_copy = len; + + do { + ret = recv(fd, buf + copied, to_copy, 0); + if (ret > 0) { + assert(ret <= to_copy); + copied += ret; + to_copy -= ret; + } + } while ((ret > 0 && to_copy > 0) + || (ret < 0 && errno == EINTR)); + if (ret > 0) + ret = copied; + /* ret = 0 means orderly shutdown, ret < 0 is error. */ + return ret; +} + +static +ssize_t lttng_live_send(int fd, const void *buf, size_t len) +{ + ssize_t ret; + + do { + ret = send(fd, buf, len, MSG_NOSIGNAL); + } while (ret < 0 && errno == EINTR); + return ret; +} int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) { @@ -78,16 +118,21 @@ int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) 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; @@ -98,14 +143,17 @@ int lttng_live_connect_viewer(struct lttng_live_ctx *ctx) 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) @@ -115,6 +163,11 @@ int lttng_live_establish_connection(struct lttng_live_ctx *ctx) 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; @@ -124,37 +177,27 @@ int lttng_live_establish_connection(struct lttng_live_ctx *ctx) connect.minor = htobe32(LTTNG_LIVE_MINOR); connect.type = htobe32(LTTNG_VIEWER_CLIENT_COMMAND); - do { - ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); - } while (ret_len < 0 && errno == EINTR); + 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)); - do { - ret_len = send(ctx->control_sock, &connect, sizeof(connect), 0); - } while (ret_len < 0 && errno == EINTR); + ret_len = lttng_live_send(ctx->control_sock, &connect, sizeof(connect)); if (ret_len < 0) { perror("[error] Error sending version"); - ret = ret_len; goto error; } assert(ret_len == sizeof(connect)); - do { - ret_len = recv(ctx->control_sock, &connect, sizeof(connect), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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)); @@ -164,10 +207,24 @@ int lttng_live_establish_connection(struct lttng_live_ctx *ctx) 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 @@ -242,6 +299,11 @@ int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) 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(); @@ -251,44 +313,33 @@ int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) 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); + 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)); - do { - ret_len = recv(ctx->control_sock, &list, sizeof(list), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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)); sessions_count = be32toh(list.sessions_count); for (i = 0; i < sessions_count; i++) { - do { - ret_len = recv(ctx->control_sock, &lsession, sizeof(lsession), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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)); @@ -319,11 +370,13 @@ int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path) 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, @@ -351,6 +404,22 @@ int lttng_live_ctf_trace_assign(struct lttng_live_viewer_stream *stream, return ret; } +static +int open_metadata_fp_write(struct lttng_live_viewer_stream *stream, + char **metadata_buf, size_t *size) +{ + int ret = 0; + + stream->metadata_fp_write = + babeltrace_open_memstream(metadata_buf, size); + if (!stream->metadata_fp_write) { + perror("Metadata open_memstream"); + ret = -1; + } + + return ret; +} + int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) { struct lttng_viewer_cmd cmd; @@ -360,6 +429,11 @@ int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) 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; @@ -367,40 +441,30 @@ int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) memset(&rq, 0, sizeof(rq)); rq.session_id = htobe64(id); // TODO: add cmd line parameter to select seek beginning - //rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); + // rq.seek = htobe32(LTTNG_VIEWER_SEEK_BEGINNING); rq.seek = htobe32(LTTNG_VIEWER_SEEK_LAST); - do { - ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); - } while (ret_len < 0 && errno == EINTR); + 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)); - do { - ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); - } while (ret_len < 0 && errno == EINTR); + ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); if (ret_len < 0) { perror("[error] Error sending attach request"); - ret = ret_len; goto error; } assert(ret_len == sizeof(rq)); - do { - ret_len = recv(ctx->control_sock, &rp, sizeof(rp), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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)); @@ -413,25 +477,20 @@ int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) 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); @@ -444,22 +503,18 @@ int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) ret = 0; goto end; } - printf_verbose("Waiting for %u streams:\n", - be32toh(rp.streams_count)); + 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), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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; goto error; } if (ret_len < 0) { perror("[error] Error receiving stream"); - ret = ret_len; goto error; } assert(ret_len == sizeof(stream)); @@ -472,39 +527,11 @@ int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) 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; + ctx->session->streams[i].ctf_stream_id = -1ULL; 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)); @@ -514,25 +541,33 @@ int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id) } 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 (ret < 0) { + if (lttng_live_should_quit()) { + goto end; + } if (ret == -LTTNG_VIEWER_NEW_STREAMS_HUP) { printf_verbose("Session %" PRIu64 " closed\n", id); @@ -551,13 +586,55 @@ restart: ret = -1; goto end; } + } else { + nb_streams += ret; } } + ret = nb_streams; end: return ret; } +static +int append_metadata(struct lttng_live_ctx *ctx, + struct lttng_live_viewer_stream *viewer_stream) +{ + int ret; + struct lttng_live_viewer_stream *metadata; + char *metadata_buf = NULL; + + printf_verbose("get_next_index: new metadata needed\n"); + ret = get_new_metadata(ctx, viewer_stream, &metadata_buf); + if (ret < 0) { + free(metadata_buf); + goto error; + } + + metadata = viewer_stream->ctf_trace->metadata_stream; + metadata->ctf_trace->metadata_fp = + babeltrace_fmemopen(metadata_buf, + metadata->metadata_len, "rb"); + if (!metadata->ctf_trace->metadata_fp) { + perror("Metadata fmemopen"); + free(metadata_buf); + ret = -1; + goto error; + } + ret = ctf_append_trace_metadata( + viewer_stream->ctf_trace->handle->td, + metadata->ctf_trace->metadata_fp); + /* We accept empty metadata packets */ + if (ret != 0 && ret != -ENOENT) { + fprintf(stderr, "[error] Appending metadata\n"); + goto error; + } + ret = 0; + +error: + return ret; +} + static int get_data_packet(struct lttng_live_ctx *ctx, struct ctf_stream_pos *pos, @@ -570,54 +647,47 @@ int get_data_packet(struct lttng_live_ctx *ctx, 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; 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); - do { - ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); - } while (ret_len < 0 && errno == EINTR); + 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)); - do { - ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); - } while (ret_len < 0 && errno == EINTR); + ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); if (ret_len < 0) { perror("[error] Error sending get_data_packet request"); - ret = ret_len; goto error; } assert(ret_len == sizeof(rq)); - do { - ret_len = recv(ctx->control_sock, &rp, sizeof(rp), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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", ret_len, - sizeof(rp)); - ret = -1; + ", received %" PRId64 "\n", sizeof(rp), + ret_len); goto error; } @@ -630,41 +700,41 @@ int get_data_packet(struct lttng_live_ctx *ctx, "\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"); - ret = 0; - goto end; + ret = append_metadata(ctx, stream); + if (ret) + goto error; } 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) goto error; - g_hash_table_foreach(ctx->session->ctf_traces, add_traces, - ctx->bt_ctx); - ret = 0; - goto end; + else if (ret > 0) + g_hash_table_foreach(ctx->session->ctf_traces, + add_traces, ctx->bt_ctx); + } + 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) { @@ -676,7 +746,6 @@ int get_data_packet(struct lttng_live_ctx *ctx, ret = munmap_align(pos->base_mma); if (ret) { perror("[error] Unable to unmap old base"); - ret = -1; goto error; } pos->base_mma = NULL; @@ -687,7 +756,6 @@ int get_data_packet(struct lttng_live_ctx *ctx, if (pos->base_mma == MAP_FAILED) { perror("[error] mmap error"); pos->base_mma = NULL; - ret = -1; goto error; } @@ -696,83 +764,68 @@ int get_data_packet(struct lttng_live_ctx *ctx, stream->mmap_size); } - do { - ret_len = recv(ctx->control_sock, - mmap_align_addr(pos->base_mma), len, - MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + ret_len = lttng_live_recv(ctx->control_sock, + 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; } -/* - * Return number of metadata bytes written or a negative value on error. - */ static -int get_new_metadata(struct lttng_live_ctx *ctx, - struct lttng_live_viewer_stream *viewer_stream, - uint64_t *metadata_len) +int get_one_metadata_packet(struct lttng_live_ctx *ctx, + struct lttng_live_viewer_stream *metadata_stream) { uint64_t len = 0; int ret; struct lttng_viewer_cmd cmd; struct lttng_viewer_get_metadata rq; struct lttng_viewer_metadata_packet rp; - struct lttng_live_viewer_stream *metadata_stream; char *data = NULL; ssize_t ret_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; - metadata_stream = viewer_stream->ctf_trace->metadata_stream; - rq.stream_id = htobe64(metadata_stream->id); - - do { - ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); - } while (ret_len < 0 && errno == EINTR); + 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)); - do { - ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); - } while (ret_len < 0 && errno == EINTR); + ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); if (ret_len < 0) { perror("[error] Error sending get_metadata request"); - ret = ret_len; goto error; } assert(ret_len == sizeof(rq)); - do { - ret_len = recv(ctx->control_sock, &rp, sizeof(rp), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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)); @@ -783,67 +836,124 @@ int get_new_metadata(struct lttng_live_ctx *ctx, break; case LTTNG_VIEWER_NO_NEW_METADATA: printf_verbose("get_metadata : NO NEW\n"); - ret = -1; + ret = 0; 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; } - do { - ret_len = recv(ctx->control_sock, data, len, MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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); do { - ret_len = write(metadata_stream->fd, data, len); + ret_len = fwrite(data, 1, len, + metadata_stream->metadata_fp_write); } while (ret_len < 0 && errno == EINTR); if (ret_len < 0) { - free(data); - ret = ret_len; - goto error; + fprintf(stderr, "[error] Writing in the metadata fp\n"); + 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); +error: + return -1; +} + +/* + * Return 0 on success, a negative value on error. + */ +static +int get_new_metadata(struct lttng_live_ctx *ctx, + struct lttng_live_viewer_stream *viewer_stream, + char **metadata_buf) +{ + int ret = 0; + struct lttng_live_viewer_stream *metadata_stream; + size_t size, len_read = 0; + + metadata_stream = viewer_stream->ctf_trace->metadata_stream; + if (!metadata_stream) { + fprintf(stderr, "[error] No metadata stream\n"); + ret = -1; + goto error; + } + metadata_stream->metadata_len = 0; + ret = open_metadata_fp_write(metadata_stream, metadata_buf, &size); + if (ret < 0) { + goto error; + } + + do { + /* + * get_one_metadata_packet returns the number of bytes + * received, 0 when we have received everything, a + * negative value on error. + */ + ret = get_one_metadata_packet(ctx, metadata_stream); + if (ret > 0) { + len_read += ret; + } + if (!len_read) { + (void) poll(NULL, 0, ACTIVE_POLL_DELAY); + } + } while (ret > 0 || !len_read); + + if (fclose(metadata_stream->metadata_fp_write)) + perror("fclose"); + metadata_stream->metadata_fp_write = NULL; - *metadata_len = len; - ret = 0; -end: 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. * @@ -852,14 +962,13 @@ error: 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; - uint64_t metadata_len; ssize_t ret_len; + struct lttng_viewer_index *rp = &viewer_stream->current_index; cmd.cmd = htobe32(LTTNG_VIEWER_GET_NEXT_INDEX); cmd.data_size = sizeof(rq); @@ -869,99 +978,166 @@ int get_next_index(struct lttng_live_ctx *ctx, rq.stream_id = htobe64(viewer_stream->id); retry: - do { - ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); - } while (ret_len < 0 && errno == EINTR); + if (lttng_live_should_quit()) { + ret = -1; + goto end; + } + 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)); - do { - ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); - } while (ret_len < 0 && errno == EINTR); + ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); if (ret_len < 0) { perror("[error] Error sending get_next_index request"); - ret = ret_len; goto error; } assert(ret_len == sizeof(rq)); - do { - ret_len = recv(ctx->control_sock, &rp, sizeof(rp), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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"); 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); - - if (rp.flags & LTTNG_VIEWER_FLAG_NEW_METADATA) { - printf_verbose("get_next_index: new metadata needed\n"); - ret = get_new_metadata(ctx, viewer_stream, - &metadata_len); - if (ret < 0) { + 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) { + 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) goto error; - g_hash_table_foreach(ctx->session->ctf_traces, add_traces, - ctx->bt_ctx); + else if (ret > 0) + 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"); - sleep(0.1); + (void) poll(NULL, 0, ACTIVE_POLL_DELAY); goto retry; case LTTNG_VIEWER_INDEX_HUP: printf_verbose("get_next_index: stream hung up\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"); - 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; + + 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; } @@ -974,14 +1150,21 @@ void ctf_live_packet_seek(struct bt_stream_pos *stream_pos, size_t index, 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); @@ -1010,11 +1193,45 @@ retry: 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; } @@ -1028,19 +1245,23 @@ retry: } if (cur_index->content_size == 0) { - file_stream->parent.cycles_timestamp = + 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); + } } 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); + 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); @@ -1058,43 +1279,20 @@ retry: 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; @@ -1107,44 +1305,43 @@ int lttng_live_create_viewer_session(struct lttng_live_ctx *ctx) 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; - do { - ret_len = send(ctx->control_sock, &cmd, sizeof(cmd), 0); - } while (ret_len < 0 && errno == EINTR); + 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)); - do { - ret_len = recv(ctx->control_sock, &resp, sizeof(resp), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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 @@ -1165,14 +1362,15 @@ int del_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; + int i, ret; struct bt_context *bt_ctx = user_data; struct lttng_live_ctf_trace *trace = value; 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; /* * We don't know how many streams we will receive for a trace, so @@ -1198,15 +1396,29 @@ void add_traces(gpointer key, gpointer value, gpointer user_data) new_mmap_stream->fd = -1; bt_list_add(&new_mmap_stream->list, &mmap_list.head); } else { + char *metadata_buf = NULL; + /* Get all possible metadata before starting */ - do { - ret = get_new_metadata(ctx, stream, - &metadata_len); - if (ret == 0) { - total_metadata += metadata_len; - } - } while (ret == 0 || total_metadata == 0); - trace->metadata_fp = fopen(stream->path, "r"); + ret = get_new_metadata(ctx, stream, &metadata_buf); + if (ret) { + free(metadata_buf); + goto end_free; + } + if (!stream->metadata_len) { + fprintf(stderr, "[error] empty metadata\n"); + ret = -1; + free(metadata_buf); + goto end_free; + } + + trace->metadata_fp = babeltrace_fmemopen(metadata_buf, + stream->metadata_len, "rb"); + if (!trace->metadata_fp) { + perror("Metadata fmemopen2"); + ret = -1; + free(metadata_buf); + goto end_free; + } } } @@ -1221,15 +1433,14 @@ void add_traces(gpointer key, gpointer value, gpointer user_data) fprintf(stderr, "[error] Error adding trace\n"); goto end_free; } + trace->metadata_stream->metadata_len = 0; + handle = (struct bt_trace_handle *) g_hash_table_lookup( + bt_ctx->trace_handles, + (gpointer) (unsigned long) ret); + td = handle->td; + trace->handle = handle; 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; bt_iter_add_trace(bt_ctx->current_iterator, td); } @@ -1244,16 +1455,25 @@ end: return; } +/* + * 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; + 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; @@ -1261,37 +1481,27 @@ int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) 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); + 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)); - do { - ret_len = send(ctx->control_sock, &rq, sizeof(rq), 0); - } while (ret_len < 0 && errno == EINTR); + ret_len = lttng_live_send(ctx->control_sock, &rq, sizeof(rq)); if (ret_len < 0) { perror("[error] Error sending get_new_streams request"); - ret = ret_len; goto error; } assert(ret_len == sizeof(rq)); - do { - ret_len = recv(ctx->control_sock, &rp, sizeof(rp), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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)); @@ -1307,13 +1517,11 @@ int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) 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); @@ -1332,17 +1540,13 @@ int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) ctx->session->streams = g_new0(struct lttng_live_viewer_stream, ctx->session->stream_count); for (i = 0; i < stream_count; i++) { - do { - ret_len = recv(ctx->control_sock, &stream, sizeof(stream), MSG_WAITALL); - } while (ret_len < 0 && errno == EINTR); + 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; goto error; } if (ret_len < 0) { perror("[error] Error receiving stream"); - ret = ret_len; goto error; } assert(ret_len == sizeof(stream)); @@ -1355,55 +1559,29 @@ int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id) 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; + ctx->session->streams[i].ctf_stream_id = -1ULL; 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; } + nb_streams++; } - 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; #if 0 @@ -1437,8 +1615,9 @@ void lttng_live_read(struct lttng_live_ctx *ctx) sout = container_of(td_write, struct ctf_text_stream_pos, trace_descriptor); - if (!sout->parent.event_cb) + if (!sout->parent.event_cb) { goto end_free; + } #endif ret = lttng_live_create_viewer_session(ctx); @@ -1466,13 +1645,24 @@ void lttng_live_read(struct lttng_live_ctx *ctx) for (;;) { int flags; #endif + 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) + if (ret < 0) { goto end_free; + } + if (!ctx->session->stream_count) { + (void) poll(NULL, 0, ACTIVE_POLL_DELAY); + } } g_hash_table_foreach(ctx->session->ctf_traces, add_traces, @@ -1482,11 +1672,19 @@ void lttng_live_read(struct lttng_live_ctx *ctx) 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) { @@ -1538,5 +1736,9 @@ void lttng_live_read(struct lttng_live_ctx *ctx) end_free: bt_context_put(ctx->bt_ctx); end: - return; + ret = 0; + if (lttng_live_should_quit()) { + ret = 0; + } + return ret; } diff --git a/src/lttng-live-comm.h b/src/lttng-live-comm.h index 2638da1..69ee7ad 100644 --- a/src/lttng-live-comm.h +++ b/src/lttng-live-comm.h @@ -25,8 +25,8 @@ */ #include +#include "lttng-viewer-abi.h" -#define LTTNG_METADATA_PATH_TEMPLATE "/tmp/lttng-live-XXXXXX" #define LTTNG_DEFAULT_NETWORK_VIEWER_PORT 5344 #define LTTNG_LIVE_MAJOR 2 @@ -38,6 +38,9 @@ struct lttng_live_ctx { char relay_hostname[NAME_MAX]; int control_sock; int port; + /* Protocol version to use for this connection. */ + uint32_t major; + uint32_t minor; struct lttng_live_session *session; struct bt_context *bt_ctx; GArray *session_ids; @@ -46,11 +49,14 @@ struct lttng_live_ctx { struct lttng_live_viewer_stream { uint64_t id; uint64_t mmap_size; - int fd; + uint64_t ctf_stream_id; + FILE *metadata_fp_write; + ssize_t metadata_len; int metadata_flag; - int first_read; + int data_pending; struct lttng_live_session *session; struct lttng_live_ctf_trace *ctf_trace; + struct lttng_viewer_index current_index; char path[PATH_MAX]; }; @@ -67,6 +73,7 @@ struct lttng_live_ctf_trace { struct lttng_live_viewer_stream *metadata_stream; GPtrArray *streams; FILE *metadata_fp; + struct bt_trace_handle *handle; int trace_id; int in_use; }; @@ -84,7 +91,8 @@ int lttng_live_connect_viewer(struct lttng_live_ctx *ctx); int lttng_live_establish_connection(struct lttng_live_ctx *ctx); int lttng_live_list_sessions(struct lttng_live_ctx *ctx, const char *path); int lttng_live_attach_session(struct lttng_live_ctx *ctx, uint64_t id); -void lttng_live_read(struct lttng_live_ctx *ctx); +int lttng_live_read(struct lttng_live_ctx *ctx); int lttng_live_get_new_streams(struct lttng_live_ctx *ctx, uint64_t id); +int lttng_live_should_quit(void); #endif /* _LTTNG_LIVE_FUNCTIONS_H */ diff --git a/src/lttng-session.h b/src/lttng-session.h index e61f8a4..b5e1377 100644 --- a/src/lttng-session.h +++ b/src/lttng-session.h @@ -15,12 +15,12 @@ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#ifndef LTTNG_SESSION_H -#define LTTNG_SESSION_H +#ifndef LTTNGTOP_SESSION_H +#define LTTNGTOP_SESSION_H int create_local_session(); int destroy_local_session(); int create_live_local_session(char **session_path, char **session_name, int print); int destroy_live_local_session(char *name); -#endif /* LTTNG_SESSION_H */ +#endif /* LTTNGTOP_SESSION_H */ diff --git a/src/lttngtop.c b/src/lttngtop.c index a2b552c..7e34664 100644 --- a/src/lttngtop.c +++ b/src/lttngtop.c @@ -40,6 +40,7 @@ #include #include #include + #ifdef LTTNGTOP_MMAP_LIVE #include #include diff --git a/src/network-live.c b/src/network-live.c index 4f5caef..9edb5b4 100644 --- a/src/network-live.c +++ b/src/network-live.c @@ -51,6 +51,55 @@ #include #include +static volatile int should_quit; + +int lttng_live_should_quit(void) +{ + return should_quit; +} + +static +void sighandler(int sig) +{ + switch (sig) { + case SIGTERM: + case SIGINT: + should_quit = 1; + break; + default: + break; + } +} + +/* + * TODO: Eventually, this signal handler setup should be done at the + * plugin manager level, rather than within this plugin. Beware, we are + * not cleaning up the signal handler after plugin execution. + */ +static +int setup_sighandler(void) +{ + struct sigaction sa; + sigset_t sigset; + int ret; + + if ((ret = sigemptyset(&sigset)) < 0) { + perror("sigemptyset"); + return ret; + } + sa.sa_handler = sighandler; + sa.sa_mask = sigset; + sa.sa_flags = 0; + if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { + perror("sigaction"); + return ret; + } + if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { + perror("sigaction"); + return ret; + } + return 0; +} /* * hostname parameter needs to hold NAME_MAX chars. */ @@ -59,14 +108,14 @@ int parse_url(const char *path, struct lttng_live_ctx *ctx) { char remain[3][NAME_MAX]; int ret = -1, proto, proto_offset = 0; - size_t path_len = strlen(path); + size_t path_len = strlen(path); /* not accounting \0 */ /* * Since sscanf API does not allow easily checking string length * against a size defined by a macro. Test it beforehand on the * input. We know the output is always <= than the input length. */ - if (path_len > NAME_MAX) { + if (path_len >= NAME_MAX) { goto end; } ret = sscanf(path, "net%d://", &proto); @@ -97,6 +146,10 @@ int parse_url(const char *path, struct lttng_live_ctx *ctx) if (ret < 0) { goto end; } + } else if (ret == 0) { + fprintf(stderr, "[error] Missing port number after delimitor ':'\n"); + ret = -1; + goto end; } break; case '/': @@ -115,8 +168,9 @@ int parse_url(const char *path, struct lttng_live_ctx *ctx) } } - if (ctx->port < 0) + if (ctx->port < 0) { ctx->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT; + } if (strlen(remain[2]) == 0) { printf_verbose("Connecting to hostname : %s, port : %d, " @@ -165,10 +219,14 @@ static int lttng_live_open_trace_read(const char *path) if (ret < 0) { goto end_free; } - +#if 0 + ret = setup_sighandler(); + if (ret < 0) { + goto end_free; + } +#endif ret = lttng_live_connect_viewer(ctx); if (ret < 0) { - fprintf(stderr, "[error] Connection failed\n"); goto end_free; } printf_verbose("LTTng-live connected to relayd\n"); @@ -177,21 +235,26 @@ static int lttng_live_open_trace_read(const char *path) if (ret < 0) { goto end_free; } + printf_verbose("Listing sessions\n"); ret = lttng_live_list_sessions(ctx, path); if (ret < 0) { - fprintf(stderr, "[error] List error\n"); goto end_free; } - if (ctx->session_ids->len > 0) - lttng_live_read(ctx); + if (ctx->session_ids->len > 0) { + ret = lttng_live_read(ctx); + } end_free: g_hash_table_destroy(ctx->session->ctf_traces); g_free(ctx->session); g_free(ctx->session->streams); g_free(ctx); + + if (lttng_live_should_quit()) { + ret = 0; + } return ret; } @@ -218,7 +281,9 @@ struct bt_trace_descriptor *lttng_live_open_trace(const char *path, int flags, pos->parent.rw_table = NULL; pos->parent.event_cb = NULL; pos->parent.trace = &pos->trace_descriptor; - lttng_live_open_trace_read(path); + if (lttng_live_open_trace_read(path) < 0) { + goto error; + } return &pos->trace_descriptor; error: