Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright 2013-2014, The Android Open Source Project |
| 3 | ** |
| 4 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | ** you may not use this file except in compliance with the License. |
| 6 | ** You may obtain a copy of the License at |
| 7 | ** |
| 8 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | ** |
| 10 | ** Unless required by applicable law or agreed to in writing, software |
| 11 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | ** See the License for the specific language governing permissions and |
| 14 | ** limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <errno.h> |
| 18 | #include <fcntl.h> |
| 19 | #include <pthread.h> |
| 20 | #include <sched.h> |
| 21 | #include <stddef.h> |
| 22 | #include <stdlib.h> |
| 23 | #include <string.h> |
| 24 | #include <unistd.h> |
| 25 | |
Mark Salyzyn | 6584d0a | 2016-09-28 13:26:55 -0700 | [diff] [blame] | 26 | #include <android/log.h> |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 27 | #include <cutils/list.h> |
Mark Salyzyn | c33103c | 2016-03-28 16:20:29 -0700 | [diff] [blame] | 28 | #include <private/android_filesystem_config.h> |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 29 | |
| 30 | #include "config_read.h" |
| 31 | #include "log_portability.h" |
| 32 | #include "logger.h" |
| 33 | |
| 34 | /* android_logger_alloc unimplemented, no use case */ |
| 35 | /* android_logger_free not exported */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 36 | static void android_logger_free(struct logger* logger) { |
| 37 | struct android_log_logger* logger_internal = |
| 38 | (struct android_log_logger*)logger; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 39 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 40 | if (!logger_internal) { |
| 41 | return; |
| 42 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 43 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 44 | list_remove(&logger_internal->node); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 45 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 46 | free(logger_internal); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | /* android_logger_alloc unimplemented, no use case */ |
| 50 | |
| 51 | /* method for getting the associated sublog id */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 52 | LIBLOG_ABI_PUBLIC log_id_t android_logger_get_id(struct logger* logger) { |
| 53 | return ((struct android_log_logger*)logger)->logId; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 54 | } |
| 55 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 56 | static int init_transport_context(struct android_log_logger_list* logger_list) { |
| 57 | struct android_log_transport_read* transport; |
| 58 | struct listnode* node; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 59 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 60 | if (!logger_list) { |
| 61 | return -EINVAL; |
| 62 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 63 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 64 | if (list_empty(&logger_list->logger)) { |
| 65 | return -EINVAL; |
| 66 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 67 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 68 | if (!list_empty(&logger_list->transport)) { |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 69 | return 0; |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | __android_log_lock(); |
| 73 | /* mini __write_to_log_initialize() to populate transports */ |
| 74 | if (list_empty(&__android_log_transport_read) && |
| 75 | list_empty(&__android_log_persist_read)) { |
| 76 | __android_log_config_read(); |
| 77 | } |
| 78 | __android_log_unlock(); |
| 79 | |
| 80 | node = (logger_list->mode & ANDROID_LOG_PSTORE) |
| 81 | ? &__android_log_persist_read |
| 82 | : &__android_log_transport_read; |
| 83 | |
| 84 | read_transport_for_each(transport, node) { |
| 85 | struct android_log_transport_context* transp; |
| 86 | struct android_log_logger* logger; |
| 87 | unsigned logMask = 0; |
| 88 | |
| 89 | logger_for_each(logger, logger_list) { |
| 90 | log_id_t logId = logger->logId; |
| 91 | |
| 92 | if ((logId == LOG_ID_SECURITY) && (__android_log_uid() != AID_SYSTEM)) { |
| 93 | continue; |
| 94 | } |
| 95 | if (transport->read && |
| 96 | (!transport->available || (transport->available(logId) >= 0))) { |
| 97 | logMask |= 1 << logId; |
| 98 | } |
| 99 | } |
| 100 | if (!logMask) { |
| 101 | continue; |
| 102 | } |
| 103 | transp = calloc(1, sizeof(*transp)); |
| 104 | if (!transp) { |
| 105 | return -ENOMEM; |
| 106 | } |
| 107 | transp->parent = logger_list; |
| 108 | transp->transport = transport; |
| 109 | transp->logMask = logMask; |
| 110 | transp->ret = 1; |
| 111 | list_add_tail(&logger_list->transport, &transp->node); |
| 112 | } |
| 113 | if (list_empty(&logger_list->transport)) { |
| 114 | return -ENODEV; |
| 115 | } |
| 116 | return 0; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 117 | } |
| 118 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 119 | #define LOGGER_FUNCTION(logger, def, func, args...) \ |
| 120 | ssize_t ret = -EINVAL; \ |
| 121 | struct android_log_transport_context* transp; \ |
| 122 | struct android_log_logger* logger_internal = \ |
| 123 | (struct android_log_logger*)(logger); \ |
| 124 | \ |
| 125 | if (!logger_internal) { \ |
| 126 | return ret; \ |
| 127 | } \ |
| 128 | ret = init_transport_context(logger_internal->parent); \ |
| 129 | if (ret < 0) { \ |
| 130 | return ret; \ |
| 131 | } \ |
| 132 | \ |
| 133 | ret = (def); \ |
| 134 | transport_context_for_each(transp, logger_internal->parent) { \ |
| 135 | if ((transp->logMask & (1 << logger_internal->logId)) && \ |
| 136 | transp->transport && transp->transport->func) { \ |
| 137 | ssize_t retval = \ |
| 138 | (transp->transport->func)(logger_internal, transp, ##args); \ |
| 139 | if ((ret >= 0) || (ret == (def))) { \ |
| 140 | ret = retval; \ |
| 141 | } \ |
| 142 | } \ |
| 143 | } \ |
| 144 | return ret |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 145 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 146 | LIBLOG_ABI_PUBLIC int android_logger_clear(struct logger* logger) { |
| 147 | LOGGER_FUNCTION(logger, -ENODEV, clear); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 148 | } |
| 149 | |
| 150 | /* returns the total size of the log's ring buffer */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 151 | LIBLOG_ABI_PUBLIC long android_logger_get_log_size(struct logger* logger) { |
| 152 | LOGGER_FUNCTION(logger, -ENODEV, getSize); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 153 | } |
| 154 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 155 | LIBLOG_ABI_PUBLIC int android_logger_set_log_size(struct logger* logger, |
| 156 | unsigned long size) { |
| 157 | LOGGER_FUNCTION(logger, -ENODEV, setSize, size); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | /* |
| 161 | * returns the readable size of the log's ring buffer (that is, amount of the |
| 162 | * log consumed) |
| 163 | */ |
| 164 | LIBLOG_ABI_PUBLIC long android_logger_get_log_readable_size( |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 165 | struct logger* logger) { |
| 166 | LOGGER_FUNCTION(logger, -ENODEV, getReadableSize); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | /* |
| 170 | * returns the logger version |
| 171 | */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 172 | LIBLOG_ABI_PUBLIC int android_logger_get_log_version(struct logger* logger) { |
| 173 | LOGGER_FUNCTION(logger, 4, version); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 174 | } |
| 175 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 176 | #define LOGGER_LIST_FUNCTION(logger_list, def, func, args...) \ |
| 177 | struct android_log_transport_context* transp; \ |
| 178 | struct android_log_logger_list* logger_list_internal = \ |
| 179 | (struct android_log_logger_list*)(logger_list); \ |
| 180 | \ |
| 181 | ssize_t ret = init_transport_context(logger_list_internal); \ |
| 182 | if (ret < 0) { \ |
| 183 | return ret; \ |
| 184 | } \ |
| 185 | \ |
| 186 | ret = (def); \ |
| 187 | transport_context_for_each(transp, logger_list_internal) { \ |
| 188 | if (transp->transport && (transp->transport->func)) { \ |
| 189 | ssize_t retval = \ |
| 190 | (transp->transport->func)(logger_list_internal, transp, ##args); \ |
| 191 | if ((ret >= 0) || (ret == (def))) { \ |
| 192 | ret = retval; \ |
| 193 | } \ |
| 194 | } \ |
| 195 | } \ |
| 196 | return ret |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 197 | |
| 198 | /* |
| 199 | * returns statistics |
| 200 | */ |
| 201 | LIBLOG_ABI_PUBLIC ssize_t android_logger_get_statistics( |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 202 | struct logger_list* logger_list, char* buf, size_t len) { |
| 203 | LOGGER_LIST_FUNCTION(logger_list, -ENODEV, getStats, buf, len); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | LIBLOG_ABI_PUBLIC ssize_t android_logger_get_prune_list( |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 207 | struct logger_list* logger_list, char* buf, size_t len) { |
| 208 | LOGGER_LIST_FUNCTION(logger_list, -ENODEV, getPrune, buf, len); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 209 | } |
| 210 | |
| 211 | LIBLOG_ABI_PUBLIC int android_logger_set_prune_list( |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 212 | struct logger_list* logger_list, char* buf, size_t len) { |
| 213 | LOGGER_LIST_FUNCTION(logger_list, -ENODEV, setPrune, buf, len); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 214 | } |
| 215 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 216 | LIBLOG_HIDDEN struct listnode __android_log_readers = { &__android_log_readers, |
| 217 | &__android_log_readers }; |
Mark Salyzyn | cf983bc | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 218 | #if !defined(_WIN32) |
| 219 | LIBLOG_HIDDEN pthread_rwlock_t __android_log_readers_lock = |
| 220 | PTHREAD_RWLOCK_INITIALIZER; |
| 221 | #endif |
| 222 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 223 | LIBLOG_ABI_PUBLIC struct logger_list* android_logger_list_alloc( |
| 224 | int mode, unsigned int tail, pid_t pid) { |
| 225 | struct android_log_logger_list* logger_list; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 226 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 227 | logger_list = calloc(1, sizeof(*logger_list)); |
| 228 | if (!logger_list) { |
| 229 | return NULL; |
| 230 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 231 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 232 | list_init(&logger_list->logger); |
| 233 | list_init(&logger_list->transport); |
| 234 | logger_list->mode = mode; |
| 235 | logger_list->tail = tail; |
| 236 | logger_list->pid = pid; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 237 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 238 | logger_list_wrlock(); |
| 239 | list_add_tail(&__android_log_readers, &logger_list->node); |
| 240 | logger_list_unlock(); |
Mark Salyzyn | cf983bc | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 241 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 242 | return (struct logger_list*)logger_list; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 243 | } |
| 244 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 245 | LIBLOG_ABI_PUBLIC struct logger_list* android_logger_list_alloc_time( |
| 246 | int mode, log_time start, pid_t pid) { |
| 247 | struct android_log_logger_list* logger_list; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 248 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 249 | logger_list = calloc(1, sizeof(*logger_list)); |
| 250 | if (!logger_list) { |
| 251 | return NULL; |
| 252 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 253 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 254 | list_init(&logger_list->logger); |
| 255 | list_init(&logger_list->transport); |
| 256 | logger_list->mode = mode; |
| 257 | logger_list->start = start; |
| 258 | logger_list->pid = pid; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 259 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 260 | logger_list_wrlock(); |
| 261 | list_add_tail(&__android_log_readers, &logger_list->node); |
| 262 | logger_list_unlock(); |
Mark Salyzyn | cf983bc | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 263 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 264 | return (struct logger_list*)logger_list; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 265 | } |
| 266 | |
| 267 | /* android_logger_list_register unimplemented, no use case */ |
| 268 | /* android_logger_list_unregister unimplemented, no use case */ |
| 269 | |
| 270 | /* Open the named log and add it to the logger list */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 271 | LIBLOG_ABI_PUBLIC struct logger* android_logger_open( |
| 272 | struct logger_list* logger_list, log_id_t logId) { |
| 273 | struct android_log_logger_list* logger_list_internal = |
| 274 | (struct android_log_logger_list*)logger_list; |
| 275 | struct android_log_logger* logger; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 276 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 277 | if (!logger_list_internal || (logId >= LOG_ID_MAX)) { |
| 278 | goto err; |
| 279 | } |
| 280 | |
| 281 | logger_for_each(logger, logger_list_internal) { |
| 282 | if (logger->logId == logId) { |
| 283 | goto ok; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 284 | } |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 285 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 286 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 287 | logger = calloc(1, sizeof(*logger)); |
| 288 | if (!logger) { |
| 289 | goto err; |
| 290 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 291 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 292 | logger->logId = logId; |
| 293 | list_add_tail(&logger_list_internal->logger, &logger->node); |
| 294 | logger->parent = logger_list_internal; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 295 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 296 | /* Reset known transports to re-evaluate, we just added one */ |
| 297 | while (!list_empty(&logger_list_internal->transport)) { |
| 298 | struct listnode* node = list_head(&logger_list_internal->transport); |
| 299 | struct android_log_transport_context* transp = |
| 300 | node_to_item(node, struct android_log_transport_context, node); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 301 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 302 | list_remove(&transp->node); |
| 303 | free(transp); |
| 304 | } |
| 305 | goto ok; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 306 | |
| 307 | err: |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 308 | logger = NULL; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 309 | ok: |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 310 | return (struct logger*)logger; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 311 | } |
| 312 | |
| 313 | /* Open the single named log and make it part of a new logger list */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 314 | LIBLOG_ABI_PUBLIC struct logger_list* android_logger_list_open( |
| 315 | log_id_t logId, int mode, unsigned int tail, pid_t pid) { |
| 316 | struct logger_list* logger_list = android_logger_list_alloc(mode, tail, pid); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 317 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 318 | if (!logger_list) { |
| 319 | return NULL; |
| 320 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 321 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 322 | if (!android_logger_open(logger_list, logId)) { |
| 323 | android_logger_list_free(logger_list); |
| 324 | return NULL; |
| 325 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 326 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 327 | return logger_list; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 328 | } |
| 329 | |
Mark Salyzyn | 8fd1faa | 2016-05-13 12:25:55 -0700 | [diff] [blame] | 330 | /* Validate log_msg packet, read function has already been null checked */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 331 | static int android_transport_read(struct android_log_logger_list* logger_list, |
| 332 | struct android_log_transport_context* transp, |
| 333 | struct log_msg* log_msg) { |
| 334 | int ret = (*transp->transport->read)(logger_list, transp, log_msg); |
Mark Salyzyn | 8fd1faa | 2016-05-13 12:25:55 -0700 | [diff] [blame] | 335 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 336 | if (ret > (int)sizeof(*log_msg)) { |
| 337 | ret = sizeof(*log_msg); |
| 338 | } |
| 339 | |
| 340 | transp->ret = ret; |
| 341 | |
| 342 | /* propagate errors, or make sure len & hdr_size members visible */ |
| 343 | if (ret < (int)(sizeof(log_msg->entry.len) + sizeof(log_msg->entry.hdr_size))) { |
| 344 | if (ret >= (int)sizeof(log_msg->entry.len)) { |
| 345 | log_msg->entry.len = 0; |
Mark Salyzyn | 8fd1faa | 2016-05-13 12:25:55 -0700 | [diff] [blame] | 346 | } |
Mark Salyzyn | 8fd1faa | 2016-05-13 12:25:55 -0700 | [diff] [blame] | 347 | return ret; |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 348 | } |
| 349 | |
| 350 | /* hdr_size correction (logger_entry -> logger_entry_v2+ conversion) */ |
| 351 | if (log_msg->entry_v2.hdr_size == 0) { |
| 352 | log_msg->entry_v2.hdr_size = sizeof(struct logger_entry); |
| 353 | } |
| 354 | if ((log_msg->entry_v2.hdr_size < sizeof(log_msg->entry_v1)) || |
| 355 | (log_msg->entry_v2.hdr_size > sizeof(log_msg->entry))) { |
| 356 | return -EINVAL; |
| 357 | } |
| 358 | |
| 359 | /* len validation */ |
| 360 | if (ret <= log_msg->entry_v2.hdr_size) { |
| 361 | log_msg->entry.len = 0; |
| 362 | } else { |
| 363 | log_msg->entry.len = ret - log_msg->entry_v2.hdr_size; |
| 364 | } |
| 365 | |
| 366 | return ret; |
Mark Salyzyn | 8fd1faa | 2016-05-13 12:25:55 -0700 | [diff] [blame] | 367 | } |
| 368 | |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 369 | /* Read from the selected logs */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 370 | LIBLOG_ABI_PUBLIC int android_logger_list_read(struct logger_list* logger_list, |
| 371 | struct log_msg* log_msg) { |
| 372 | struct android_log_transport_context* transp; |
| 373 | struct android_log_logger_list* logger_list_internal = |
| 374 | (struct android_log_logger_list*)logger_list; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 375 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 376 | int ret = init_transport_context(logger_list_internal); |
| 377 | if (ret < 0) { |
| 378 | return ret; |
| 379 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 380 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 381 | /* at least one transport */ |
| 382 | transp = node_to_item(logger_list_internal->transport.next, |
| 383 | struct android_log_transport_context, node); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 384 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 385 | /* more than one transport? */ |
| 386 | if (transp->node.next != &logger_list_internal->transport) { |
| 387 | /* Poll and merge sort the entries if from multiple transports */ |
| 388 | struct android_log_transport_context* oldest = NULL; |
| 389 | int ret; |
| 390 | int polled = 0; |
| 391 | do { |
| 392 | if (polled) { |
| 393 | sched_yield(); |
| 394 | } |
| 395 | ret = -1000; |
| 396 | polled = 0; |
| 397 | do { |
| 398 | int retval = transp->ret; |
| 399 | if ((retval > 0) && !transp->logMsg.entry.len) { |
| 400 | if (!transp->transport->read) { |
| 401 | retval = transp->ret = 0; |
| 402 | } else if ((logger_list_internal->mode & ANDROID_LOG_NONBLOCK) || |
| 403 | !transp->transport->poll) { |
| 404 | retval = android_transport_read(logger_list_internal, transp, |
| 405 | &transp->logMsg); |
| 406 | } else { |
| 407 | int pollval = |
| 408 | (*transp->transport->poll)(logger_list_internal, transp); |
| 409 | if (pollval <= 0) { |
| 410 | sched_yield(); |
| 411 | pollval = (*transp->transport->poll)(logger_list_internal, transp); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 412 | } |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 413 | polled = 1; |
| 414 | if (pollval < 0) { |
| 415 | if ((pollval == -EINTR) || (pollval == -EAGAIN)) { |
| 416 | return -EAGAIN; |
| 417 | } |
| 418 | retval = transp->ret = pollval; |
| 419 | } else if (pollval > 0) { |
| 420 | retval = android_transport_read(logger_list_internal, transp, |
| 421 | &transp->logMsg); |
| 422 | } |
| 423 | } |
| 424 | } |
| 425 | if (ret < retval) { |
| 426 | ret = retval; |
| 427 | } |
| 428 | if ((transp->ret > 0) && transp->logMsg.entry.len && |
| 429 | (!oldest || (oldest->logMsg.entry.sec > transp->logMsg.entry.sec) || |
| 430 | ((oldest->logMsg.entry.sec == transp->logMsg.entry.sec) && |
| 431 | (oldest->logMsg.entry.nsec > transp->logMsg.entry.nsec)))) { |
| 432 | oldest = transp; |
| 433 | } |
| 434 | transp = node_to_item(transp->node.next, |
| 435 | struct android_log_transport_context, node); |
| 436 | } while (transp != node_to_item(&logger_list_internal->transport, |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 437 | struct android_log_transport_context, |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 438 | node)); |
| 439 | if (!oldest && (logger_list_internal->mode & ANDROID_LOG_NONBLOCK)) { |
| 440 | return (ret < 0) ? ret : -EAGAIN; |
| 441 | } |
| 442 | transp = node_to_item(logger_list_internal->transport.next, |
| 443 | struct android_log_transport_context, node); |
| 444 | } while (!oldest && (ret > 0)); |
| 445 | if (!oldest) { |
| 446 | return ret; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 447 | } |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 448 | // ret is a positive value less than sizeof(struct log_msg) |
| 449 | ret = oldest->ret; |
| 450 | if (ret < oldest->logMsg.entry.hdr_size) { |
| 451 | // zero truncated header fields. |
| 452 | memset(log_msg, 0, |
| 453 | (oldest->logMsg.entry.hdr_size > sizeof(oldest->logMsg) |
| 454 | ? sizeof(oldest->logMsg) |
| 455 | : oldest->logMsg.entry.hdr_size)); |
| 456 | } |
| 457 | memcpy(log_msg, &oldest->logMsg, ret); |
| 458 | oldest->logMsg.entry.len = 0; /* Mark it as copied */ |
| 459 | return ret; |
| 460 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 461 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 462 | /* if only one, no need to copy into transport_context and merge-sort */ |
| 463 | return android_transport_read(logger_list_internal, transp, log_msg); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 464 | } |
| 465 | |
| 466 | /* Close all the logs */ |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 467 | LIBLOG_ABI_PUBLIC void android_logger_list_free(struct logger_list* logger_list) { |
| 468 | struct android_log_logger_list* logger_list_internal = |
| 469 | (struct android_log_logger_list*)logger_list; |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 470 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 471 | if (logger_list_internal == NULL) { |
| 472 | return; |
| 473 | } |
| 474 | |
| 475 | logger_list_wrlock(); |
| 476 | list_remove(&logger_list_internal->node); |
| 477 | logger_list_unlock(); |
| 478 | |
| 479 | while (!list_empty(&logger_list_internal->transport)) { |
| 480 | struct listnode* node = list_head(&logger_list_internal->transport); |
| 481 | struct android_log_transport_context* transp = |
| 482 | node_to_item(node, struct android_log_transport_context, node); |
| 483 | |
| 484 | if (transp->transport && transp->transport->close) { |
| 485 | (*transp->transport->close)(logger_list_internal, transp); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 486 | } |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 487 | list_remove(&transp->node); |
| 488 | free(transp); |
| 489 | } |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 490 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 491 | while (!list_empty(&logger_list_internal->logger)) { |
| 492 | struct listnode* node = list_head(&logger_list_internal->logger); |
| 493 | struct android_log_logger* logger = |
| 494 | node_to_item(node, struct android_log_logger, node); |
| 495 | android_logger_free((struct logger*)logger); |
| 496 | } |
Mark Salyzyn | cf983bc | 2016-03-08 16:18:26 -0800 | [diff] [blame] | 497 | |
Mark Salyzyn | 2ed51d7 | 2017-03-09 08:09:43 -0800 | [diff] [blame] | 498 | free(logger_list_internal); |
Mark Salyzyn | 018a96d | 2016-03-01 13:45:42 -0800 | [diff] [blame] | 499 | } |