| 1 | /* |
| 2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License, version 2 only, |
| 6 | * as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along |
| 14 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 16 | */ |
| 17 | |
| 18 | #define _GNU_SOURCE |
| 19 | #include <errno.h> |
| 20 | #include <stdio.h> |
| 21 | #include <stdlib.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | #include <common/common.h> |
| 26 | #include <common/consumer.h> |
| 27 | #include <common/defaults.h> |
| 28 | |
| 29 | #include "consumer.h" |
| 30 | #include "ust-consumer.h" |
| 31 | |
| 32 | /* |
| 33 | * Send all stream fds of UST channel to the consumer. |
| 34 | */ |
| 35 | static int send_channel_streams(int sock, |
| 36 | struct ust_app_channel *uchan, const char *path, |
| 37 | uid_t uid, gid_t gid, struct consumer_output *consumer) |
| 38 | { |
| 39 | int ret, fd; |
| 40 | char tmp_path[PATH_MAX]; |
| 41 | const char *pathname; |
| 42 | struct lttcomm_consumer_msg lum; |
| 43 | struct ltt_ust_stream *stream, *tmp; |
| 44 | |
| 45 | DBG("Sending streams of channel %s to UST consumer", uchan->name); |
| 46 | |
| 47 | consumer_init_channel_comm_msg(&lum, |
| 48 | LTTNG_CONSUMER_ADD_CHANNEL, |
| 49 | uchan->obj->shm_fd, |
| 50 | uchan->attr.subbuf_size, |
| 51 | uchan->obj->memory_map_size, |
| 52 | uchan->name); |
| 53 | |
| 54 | ret = consumer_send_channel(sock, &lum); |
| 55 | if (ret < 0) { |
| 56 | goto error; |
| 57 | } |
| 58 | |
| 59 | fd = uchan->obj->shm_fd; |
| 60 | ret = consumer_send_fds(sock, &fd, 1); |
| 61 | if (ret < 0) { |
| 62 | goto error; |
| 63 | } |
| 64 | |
| 65 | /* Get the right path name destination */ |
| 66 | if (consumer->type == CONSUMER_DST_LOCAL) { |
| 67 | /* Set application path to the destination path */ |
| 68 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", |
| 69 | consumer->dst.trace_path, path); |
| 70 | if (ret < 0) { |
| 71 | PERROR("snprintf stream path"); |
| 72 | goto error; |
| 73 | } |
| 74 | pathname = tmp_path; |
| 75 | DBG3("UST local consumer tracefile path: %s", pathname); |
| 76 | } else { |
| 77 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", |
| 78 | consumer->subdir, path); |
| 79 | if (ret < 0) { |
| 80 | PERROR("snprintf stream path"); |
| 81 | goto error; |
| 82 | } |
| 83 | pathname = tmp_path; |
| 84 | DBG3("UST network consumer subdir path: %s", pathname); |
| 85 | } |
| 86 | |
| 87 | cds_list_for_each_entry_safe(stream, tmp, &uchan->streams.head, list) { |
| 88 | int fds[2]; |
| 89 | |
| 90 | if (!stream->obj->shm_fd) { |
| 91 | continue; |
| 92 | } |
| 93 | |
| 94 | consumer_init_stream_comm_msg(&lum, |
| 95 | LTTNG_CONSUMER_ADD_STREAM, |
| 96 | uchan->obj->shm_fd, |
| 97 | stream->obj->shm_fd, |
| 98 | LTTNG_CONSUMER_ACTIVE_STREAM, |
| 99 | DEFAULT_UST_CHANNEL_OUTPUT, |
| 100 | stream->obj->memory_map_size, |
| 101 | uid, |
| 102 | gid, |
| 103 | consumer->net_seq_index, |
| 104 | 0, /* Metadata flag unset */ |
| 105 | stream->name, |
| 106 | pathname); |
| 107 | |
| 108 | /* Send stream and file descriptor */ |
| 109 | fds[0] = stream->obj->shm_fd; |
| 110 | fds[1] = stream->obj->wait_fd; |
| 111 | ret = consumer_send_stream(sock, consumer, &lum, fds, 2); |
| 112 | if (ret < 0) { |
| 113 | goto error; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | DBG("UST consumer channel streams sent"); |
| 118 | |
| 119 | return 0; |
| 120 | |
| 121 | error: |
| 122 | return ret; |
| 123 | } |
| 124 | |
| 125 | /* |
| 126 | * Send all stream fds of the UST session to the consumer. |
| 127 | */ |
| 128 | int ust_consumer_send_session(int consumer_fd, struct ust_app_session *usess, |
| 129 | struct consumer_output *consumer) |
| 130 | { |
| 131 | int ret = 0; |
| 132 | int sock = consumer_fd; |
| 133 | char tmp_path[PATH_MAX]; |
| 134 | const char *pathname; |
| 135 | struct lttng_ht_iter iter; |
| 136 | struct lttcomm_consumer_msg lum; |
| 137 | struct ust_app_channel *ua_chan; |
| 138 | |
| 139 | DBG("Sending metadata stream fd"); |
| 140 | |
| 141 | if (consumer_fd < 0) { |
| 142 | ERR("Consumer has negative file descriptor"); |
| 143 | return -EINVAL; |
| 144 | } |
| 145 | |
| 146 | if (usess->metadata->obj->shm_fd != 0) { |
| 147 | int fd; |
| 148 | int fds[2]; |
| 149 | |
| 150 | consumer_init_channel_comm_msg(&lum, |
| 151 | LTTNG_CONSUMER_ADD_CHANNEL, |
| 152 | usess->metadata->obj->shm_fd, |
| 153 | usess->metadata->attr.subbuf_size, |
| 154 | usess->metadata->obj->memory_map_size, |
| 155 | "metadata"); |
| 156 | |
| 157 | ret = consumer_send_channel(sock, &lum); |
| 158 | if (ret < 0) { |
| 159 | goto error; |
| 160 | } |
| 161 | |
| 162 | fd = usess->metadata->obj->shm_fd; |
| 163 | ret = consumer_send_fds(sock, &fd, 1); |
| 164 | if (ret < 0) { |
| 165 | goto error; |
| 166 | } |
| 167 | |
| 168 | /* Get correct path name destination */ |
| 169 | if (consumer->type == CONSUMER_DST_LOCAL) { |
| 170 | /* Set application path to the destination path */ |
| 171 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", |
| 172 | consumer->dst.trace_path, usess->path); |
| 173 | if (ret < 0) { |
| 174 | PERROR("snprintf stream path"); |
| 175 | goto error; |
| 176 | } |
| 177 | pathname = tmp_path; |
| 178 | |
| 179 | /* Create directory */ |
| 180 | ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, |
| 181 | usess->uid, usess->gid); |
| 182 | if (ret < 0) { |
| 183 | if (ret != -EEXIST) { |
| 184 | ERR("Trace directory creation error"); |
| 185 | goto error; |
| 186 | } |
| 187 | } |
| 188 | } else { |
| 189 | ret = snprintf(tmp_path, sizeof(tmp_path), "%s/%s", |
| 190 | consumer->subdir, usess->path); |
| 191 | if (ret < 0) { |
| 192 | PERROR("snprintf metadata path"); |
| 193 | goto error; |
| 194 | } |
| 195 | pathname = tmp_path; |
| 196 | } |
| 197 | |
| 198 | consumer_init_stream_comm_msg(&lum, |
| 199 | LTTNG_CONSUMER_ADD_STREAM, |
| 200 | usess->metadata->obj->shm_fd, |
| 201 | usess->metadata->stream_obj->shm_fd, |
| 202 | LTTNG_CONSUMER_ACTIVE_STREAM, |
| 203 | DEFAULT_UST_CHANNEL_OUTPUT, |
| 204 | usess->metadata->stream_obj->memory_map_size, |
| 205 | usess->uid, |
| 206 | usess->gid, |
| 207 | consumer->net_seq_index, |
| 208 | 1, /* Flag metadata set */ |
| 209 | "metadata", |
| 210 | pathname); |
| 211 | |
| 212 | /* Send stream and file descriptor */ |
| 213 | fds[0] = usess->metadata->stream_obj->shm_fd; |
| 214 | fds[1] = usess->metadata->stream_obj->wait_fd; |
| 215 | ret = consumer_send_stream(sock, consumer, &lum, fds, 2); |
| 216 | if (ret < 0) { |
| 217 | goto error; |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | /* Send each channel fd streams of session */ |
| 222 | rcu_read_lock(); |
| 223 | cds_lfht_for_each_entry(usess->channels->ht, &iter.iter, ua_chan, |
| 224 | node.node) { |
| 225 | /* |
| 226 | * Indicate that the channel was not created on the tracer side so skip |
| 227 | * sending unexisting streams. |
| 228 | */ |
| 229 | if (ua_chan->obj == NULL) { |
| 230 | continue; |
| 231 | } |
| 232 | |
| 233 | ret = send_channel_streams(sock, ua_chan, usess->path, usess->uid, |
| 234 | usess->gid, consumer); |
| 235 | if (ret < 0) { |
| 236 | rcu_read_unlock(); |
| 237 | goto error; |
| 238 | } |
| 239 | } |
| 240 | rcu_read_unlock(); |
| 241 | |
| 242 | DBG("consumer fds (metadata and channel streams) sent"); |
| 243 | |
| 244 | return 0; |
| 245 | |
| 246 | error: |
| 247 | return ret; |
| 248 | } |
| 249 | |
| 250 | /* |
| 251 | * Send relayd socket to consumer associated with a session name. |
| 252 | * |
| 253 | * On success return positive value. On error, negative value. |
| 254 | */ |
| 255 | int ust_consumer_send_relayd_socket(int consumer_sock, |
| 256 | struct lttcomm_sock *sock, struct consumer_output *consumer, |
| 257 | enum lttng_stream_type type) |
| 258 | { |
| 259 | int ret; |
| 260 | struct lttcomm_consumer_msg msg; |
| 261 | |
| 262 | /* Code flow error. Safety net. */ |
| 263 | assert(sock); |
| 264 | |
| 265 | msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET; |
| 266 | msg.u.relayd_sock.net_index = consumer->net_seq_index; |
| 267 | msg.u.relayd_sock.type = type; |
| 268 | memcpy(&msg.u.relayd_sock.sock, sock, sizeof(msg.u.relayd_sock.sock)); |
| 269 | |
| 270 | DBG2("Sending relayd sock info to consumer"); |
| 271 | ret = lttcomm_send_unix_sock(consumer_sock, &msg, sizeof(msg)); |
| 272 | if (ret < 0) { |
| 273 | PERROR("send consumer relayd socket info"); |
| 274 | goto error; |
| 275 | } |
| 276 | |
| 277 | DBG2("Sending relayd socket file descriptor to consumer"); |
| 278 | ret = consumer_send_fds(consumer_sock, &sock->fd, 1); |
| 279 | if (ret < 0) { |
| 280 | goto error; |
| 281 | } |
| 282 | |
| 283 | DBG("UST consumer relayd socket sent"); |
| 284 | |
| 285 | error: |
| 286 | return ret; |
| 287 | } |