+++ /dev/null
-/*
- * BabelTrace - LTTng live Output
- *
- * Copyright 2013 Julien Desfossez <jdesfossez@efficios.com>
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <babeltrace/ctf-text/types.h>
-#include <babeltrace/format.h>
-#include <babeltrace/babeltrace-internal.h>
-#include <inttypes.h>
-#include <sys/mman.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <glib.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <signal.h>
-#include "lttng-live.h"
-
-static volatile int should_quit;
-
-void bt_lttng_live_hook(void)
-{
- /*
- * Dummy function to prevent the linker from discarding this format as
- * "unused" in static builds.
- */
-}
-
-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 MAXNAMLEN chars.
- */
-static
-int parse_url(const char *path, struct lttng_live_ctx *ctx)
-{
- char remain[3][MAXNAMLEN];
- int ret = -1, proto, proto_offset = 0;
- 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 >= MAXNAMLEN) {
- goto end;
- }
- ret = sscanf(path, "net%d://", &proto);
- if (ret < 1) {
- proto = 4;
- /* net:// */
- proto_offset = strlen("net://");
- } else {
- /* net4:// or net6:// */
- proto_offset = strlen("netX://");
- }
- if (proto_offset > path_len) {
- goto end;
- }
- if (proto == 6) {
- fprintf(stderr, "[error] IPv6 is currently unsupported by lttng-live\n");
- goto end;
- }
- /* TODO : parse for IPv6 as well */
- /* Parse the hostname or IP */
- ret = sscanf(&path[proto_offset], "%[a-zA-Z.0-9%-]%s",
- ctx->relay_hostname, remain[0]);
- if (ret == 2) {
- /* Optional port number */
- switch (remain[0][0]) {
- case ':':
- ret = sscanf(remain[0], ":%d%s", &ctx->port, remain[1]);
- /* Optional session ID with port number */
- if (ret == 2) {
- ret = sscanf(remain[1], "/%s", remain[2]);
- /* Accept 0 or 1 (optional) */
- if (ret < 0) {
- goto end;
- }
- } else if (ret == 0) {
- fprintf(stderr, "[error] Missing port number after delimitor ':'\n");
- ret = -1;
- goto end;
- }
- break;
- case '/':
- /* Optional session ID */
- ret = sscanf(remain[0], "/%s", remain[2]);
- /* Accept 0 or 1 (optional) */
- if (ret < 0) {
- goto end;
- }
- break;
- default:
- fprintf(stderr, "[error] wrong delimitor : %c\n",
- remain[0][0]);
- ret = -1;
- goto end;
- }
- }
-
- if (ctx->port < 0) {
- ctx->port = LTTNG_DEFAULT_NETWORK_VIEWER_PORT;
- }
-
- if (strlen(remain[2]) == 0) {
- printf_verbose("Connecting to hostname : %s, port : %d, "
- "proto : IPv%d\n",
- ctx->relay_hostname, ctx->port, proto);
- ret = 0;
- goto end;
- }
- ret = sscanf(remain[2], "host/%[a-zA-Z.0-9%-]/%s",
- ctx->traced_hostname, ctx->session_name);
- if (ret != 2) {
- fprintf(stderr, "[error] Format : "
- "net://<hostname>/host/<traced_hostname>/<session_name>\n");
- goto end;
- }
-
- printf_verbose("Connecting to hostname : %s, port : %d, "
- "traced hostname : %s, session name : %s, "
- "proto : IPv%d\n",
- ctx->relay_hostname, ctx->port, ctx->traced_hostname,
- ctx->session_name, proto);
- ret = 0;
-
-end:
- return ret;
-}
-
-static
-guint g_uint64p_hash(gconstpointer key)
-{
- uint64_t v = *(uint64_t *) key;
-
- if (sizeof(gconstpointer) == sizeof(uint64_t)) {
- return g_direct_hash((gconstpointer) (unsigned long) v);
- } else {
- return g_direct_hash((gconstpointer) (unsigned long) (v >> 32))
- ^ g_direct_hash((gconstpointer) (unsigned long) v);
- }
-}
-
-static
-gboolean g_uint64p_equal(gconstpointer a, gconstpointer b)
-{
- uint64_t va = *(uint64_t *) a;
- uint64_t vb = *(uint64_t *) b;
-
- if (va != vb)
- return FALSE;
- return TRUE;
-}
-
-static int lttng_live_open_trace_read(const char *path)
-{
- int ret = 0;
- struct lttng_live_ctx *ctx;
-
- ctx = g_new0(struct lttng_live_ctx, 1);
- ctx->session = g_new0(struct lttng_live_session, 1);
-
- /* We need a pointer to the context from the packet_seek function. */
- ctx->session->ctx = ctx;
-
- /* HT to store the CTF traces. */
- ctx->session->ctf_traces = g_hash_table_new(g_uint64p_hash,
- g_uint64p_equal);
- ctx->port = -1;
- ctx->session_ids = g_array_new(FALSE, TRUE, sizeof(uint64_t));
-
- ret = parse_url(path, ctx);
- if (ret < 0) {
- goto end_free;
- }
- ret = setup_sighandler();
- if (ret < 0) {
- goto end_free;
- }
- ret = lttng_live_connect_viewer(ctx);
- if (ret < 0) {
- goto end_free;
- }
- printf_verbose("LTTng-live connected to relayd\n");
-
- ret = lttng_live_establish_connection(ctx);
- if (ret < 0) {
- goto end_free;
- }
-
- printf_verbose("Listing sessions\n");
- ret = lttng_live_list_sessions(ctx, path);
- if (ret < 0) {
- goto end_free;
- }
-
- 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;
-}
-
-static
-struct bt_trace_descriptor *lttng_live_open_trace(const char *path, int flags,
- void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
- int whence), FILE *metadata_fp)
-{
- struct ctf_text_stream_pos *pos;
-
- switch (flags & O_ACCMODE) {
- case O_RDONLY:
- /* OK */
- break;
- case O_RDWR:
- fprintf(stderr, "[error] lttng live plugin cannot be used as output plugin.\n");
- goto error;
- default:
- fprintf(stderr, "[error] Incorrect open flags.\n");
- goto error;
- }
-
- pos = g_new0(struct ctf_text_stream_pos, 1);
- pos->parent.rw_table = NULL;
- pos->parent.event_cb = NULL;
- pos->parent.trace = &pos->trace_descriptor;
- /*
- * Since we do *everything* in this function, we are skipping
- * the output plugin handling that is part of Babeltrace 1.x.
- * Therefore, don't expect the --output cmd line option to work.
- * This limits the output of lttng-live to stderr and stdout.
- */
- if (lttng_live_open_trace_read(path) < 0) {
- goto error;
- }
- return &pos->trace_descriptor;
-
-error:
- return NULL;
-}
-
-static
-int lttng_live_close_trace(struct bt_trace_descriptor *td)
-{
- struct ctf_text_stream_pos *pos =
- container_of(td, struct ctf_text_stream_pos,
- trace_descriptor);
- g_free(pos);
- return 0;
-}
-
-static
-struct bt_format lttng_live_format = {
- .open_trace = lttng_live_open_trace,
- .close_trace = lttng_live_close_trace,
-};
-
-static
-void __attribute__((constructor)) lttng_live_init(void)
-{
- int ret;
-
- lttng_live_format.name = g_quark_from_string("lttng-live");
- ret = bt_register_format(<tng_live_format);
- assert(!ret);
-}
-
-static
-void __attribute__((destructor)) lttng_live_exit(void)
-{
- bt_unregister_format(<tng_live_format);
-}
projects / babeltrace.git / blobdiff