| 1 | /* |
| 2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; only version 2 |
| 7 | * of the License. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #define _GNU_SOURCE |
| 20 | #include <stdlib.h> |
| 21 | #include <stdio.h> |
| 22 | #include <string.h> |
| 23 | #include <unistd.h> |
| 24 | |
| 25 | #include <lttng-sessiond-comm.h> |
| 26 | #include <lttngerr.h> |
| 27 | |
| 28 | #include "ust-comm.h" |
| 29 | #include "ust-ctl.h" |
| 30 | |
| 31 | /* |
| 32 | * Send registration done packet to the application. |
| 33 | */ |
| 34 | int ustctl_register_done(int sock) |
| 35 | { |
| 36 | struct lttcomm_ust_msg command; |
| 37 | struct lttcomm_ust_reply *reply; |
| 38 | |
| 39 | DBG("Sending register done command to %d", sock); |
| 40 | |
| 41 | command.cmd = LTTNG_UST_REGISTER_DONE; |
| 42 | command.handle = LTTNG_UST_ROOT_HANDLE; |
| 43 | |
| 44 | reply = ustcomm_send_command(sock, &command); |
| 45 | if (reply == NULL) { |
| 46 | goto error; |
| 47 | } |
| 48 | |
| 49 | if (reply->ret_code != LTTCOMM_OK) { |
| 50 | DBG("Return code: %s", lttcomm_get_readable_code(reply->ret_code)); |
| 51 | goto error; |
| 52 | } |
| 53 | |
| 54 | return 0; |
| 55 | |
| 56 | error: |
| 57 | return -1; |
| 58 | } |
| 59 | |
| 60 | /* |
| 61 | * Create an UST session on the tracer. |
| 62 | */ |
| 63 | int ustctl_create_session(int sock, struct ltt_ust_session *session) |
| 64 | { |
| 65 | struct lttcomm_ust_msg command; |
| 66 | struct lttcomm_ust_reply *reply = NULL; |
| 67 | |
| 68 | command.cmd = LTTNG_UST_SESSION; |
| 69 | command.handle = LTTNG_UST_ROOT_HANDLE; |
| 70 | |
| 71 | reply = ustcomm_send_command(sock, &command); |
| 72 | if (reply == NULL) { |
| 73 | goto error; |
| 74 | } |
| 75 | |
| 76 | if (reply->ret_code != LTTCOMM_OK) { |
| 77 | DBG("Return code: %s", lttcomm_get_readable_code(reply->ret_code)); |
| 78 | goto error; |
| 79 | } |
| 80 | |
| 81 | /* Save session handle */ |
| 82 | session->handle = reply->ret_val; |
| 83 | free(reply); |
| 84 | |
| 85 | DBG2("ustctl create session command successful"); |
| 86 | return 0; |
| 87 | |
| 88 | error: |
| 89 | free(reply); |
| 90 | return -1; |
| 91 | } |
| 92 | |
| 93 | /* |
| 94 | * Create UST channel to the tracer. |
| 95 | */ |
| 96 | int ustctl_create_channel(int sock, struct ltt_ust_session *session, |
| 97 | struct lttng_channel *channel) |
| 98 | { |
| 99 | struct lttcomm_ust_msg command; |
| 100 | struct lttcomm_ust_reply *reply = NULL; |
| 101 | struct ltt_ust_channel *uchan; |
| 102 | |
| 103 | uchan = trace_ust_create_channel(channel, session->path); |
| 104 | if (uchan == NULL) { |
| 105 | goto error; |
| 106 | } |
| 107 | |
| 108 | memset(&command, 0, sizeof(command)); |
| 109 | |
| 110 | command.cmd = LTTNG_UST_CHANNEL; |
| 111 | command.handle = session->handle; |
| 112 | |
| 113 | /* Copy channel attributes to command */ |
| 114 | memcpy(&command.u.channel, &uchan->attr, sizeof(command.u.channel)); |
| 115 | |
| 116 | reply = ustcomm_send_command(sock, &command); |
| 117 | if (reply == NULL) { |
| 118 | goto error; |
| 119 | } |
| 120 | |
| 121 | if (reply->ret_code != LTTCOMM_OK) { |
| 122 | DBG("Return code (%d): %s", reply->ret_code, |
| 123 | lttcomm_get_readable_code(reply->ret_code)); |
| 124 | goto error; |
| 125 | } |
| 126 | |
| 127 | uchan->handle = reply->ret_val; |
| 128 | |
| 129 | /* Add channel to session */ |
| 130 | cds_list_add(&uchan->list, &session->channels.head); |
| 131 | session->channels.count++; |
| 132 | |
| 133 | free(reply); |
| 134 | |
| 135 | return 0; |
| 136 | |
| 137 | error: |
| 138 | free(reply); |
| 139 | return -1; |
| 140 | } |
| 141 | |
| 142 | /* |
| 143 | * Enable UST channel. |
| 144 | */ |
| 145 | int ustctl_enable_channel(int sock, struct ltt_ust_session *session, |
| 146 | struct ltt_ust_channel *chan) |
| 147 | { |
| 148 | struct lttcomm_ust_msg command; |
| 149 | struct lttcomm_ust_reply *reply = NULL; |
| 150 | |
| 151 | memset(&command, 0, sizeof(command)); |
| 152 | |
| 153 | command.cmd = LTTNG_UST_ENABLE; |
| 154 | command.handle = chan->handle; |
| 155 | |
| 156 | reply = ustcomm_send_command(sock, &command); |
| 157 | if (reply == NULL) { |
| 158 | goto error; |
| 159 | } |
| 160 | |
| 161 | if (reply->ret_code != LTTCOMM_OK) { |
| 162 | DBG("Return code (%d): %s", reply->ret_code, |
| 163 | lttcomm_get_readable_code(reply->ret_code)); |
| 164 | goto error; |
| 165 | } else if (reply->handle != chan->handle) { |
| 166 | ERR("Receive wrong handle from UST reply on enable channel"); |
| 167 | goto error; |
| 168 | } |
| 169 | |
| 170 | chan->enabled = 1; |
| 171 | free(reply); |
| 172 | |
| 173 | DBG2("ustctl enable channel successful for sock %d", sock); |
| 174 | return 0; |
| 175 | |
| 176 | error: |
| 177 | free(reply); |
| 178 | return -1; |
| 179 | } |
| 180 | |
| 181 | /* |
| 182 | * Disable UST channel. |
| 183 | */ |
| 184 | int ustctl_disable_channel(int sock, struct ltt_ust_session *session, |
| 185 | struct ltt_ust_channel *chan) |
| 186 | { |
| 187 | struct lttcomm_ust_msg command; |
| 188 | struct lttcomm_ust_reply *reply = NULL; |
| 189 | |
| 190 | memset(&command, 0, sizeof(command)); |
| 191 | |
| 192 | command.cmd = LTTNG_UST_DISABLE; |
| 193 | command.handle = chan->handle; |
| 194 | |
| 195 | reply = ustcomm_send_command(sock, &command); |
| 196 | if (reply == NULL) { |
| 197 | goto error; |
| 198 | } |
| 199 | |
| 200 | if (reply->ret_code != LTTCOMM_OK) { |
| 201 | DBG("Return code (%d): %s", reply->ret_code, |
| 202 | lttcomm_get_readable_code(reply->ret_code)); |
| 203 | goto error; |
| 204 | } else if (reply->handle != chan->handle) { |
| 205 | ERR("Receive wrong handle from UST reply on enable channel"); |
| 206 | goto error; |
| 207 | } |
| 208 | |
| 209 | chan->enabled = 1; |
| 210 | free(reply); |
| 211 | |
| 212 | DBG2("ustctl disable channel successful for sock %d", sock); |
| 213 | return 0; |
| 214 | |
| 215 | error: |
| 216 | free(reply); |
| 217 | return -1; |
| 218 | } |