src/libsystemd/sd-device/test-sd-device-monitor.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <stdbool.h>
   4 #include <unistd.h>
   5
   6 #include "sd-device.h"
   7 #include "sd-event.h"
   8
   9 #include "device-monitor-private.h"
  10 #include "device-private.h"
  11 #include "device-util.h"
  12 #include "macro.h"
  13 #include "path-util.h"
  14 #include "stat-util.h"
  15 #include "string-util.h"
  16 #include "tests.h"
  17 #include "virt.h"
  18
  19 static int monitor_handler(sd_device_monitor *m, sd_device *d, void *userdata) {
  20         const char *s, *syspath = userdata;
  21
  22         assert_se(sd_device_get_syspath(d, &s) >= 0);
  23         assert_se(streq(s, syspath));
  24
  25         return sd_event_exit(sd_device_monitor_get_event(m), 100);
  26 }
  27
  28 static void test_receive_device_fail(void) {
  29         _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
  30         _cleanup_(sd_device_unrefp) sd_device *loopback = NULL;
  31         const char *syspath;
  32
  33         log_info("/* %s */", __func__);
  34
  35         /* Try to send device with invalid action and without seqnum. */
  36         assert_se(sd_device_new_from_syspath(&loopback, "/sys/class/net/lo") >= 0);
  37         assert_se(device_add_property(loopback, "ACTION", "hoge") >= 0);
  38
  39         assert_se(sd_device_get_syspath(loopback, &syspath) >= 0);
  40
  41         assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
  42         assert_se(sd_device_monitor_set_description(monitor_server, "sender") >= 0);
  43         assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
  44
  45         assert_se(device_monitor_new_full(&monitor_client, MONITOR_GROUP_NONE, -1) >= 0);
  46         assert_se(sd_device_monitor_set_description(monitor_client, "receiver") >= 0);
  47         assert_se(device_monitor_allow_unicast_sender(monitor_client, monitor_server) >= 0);
  48         assert_se(sd_device_monitor_start(monitor_client, monitor_handler, (void *) syspath) >= 0);
  49
  50         assert_se(device_monitor_send_device(monitor_server, monitor_client, loopback) >= 0);
  51         assert_se(sd_event_run(sd_device_monitor_get_event(monitor_client), 0) >= 0);
  52 }
  53
  54 static void test_send_receive_one(sd_device *device, bool subsystem_filter, bool tag_filter, bool use_bpf) {
  55         _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
  56         const char *syspath, *subsystem, *devtype = NULL;
  57
  58         log_device_info(device, "/* %s(subsystem_filter=%s, tag_filter=%s, use_bpf=%s) */", __func__,
  59                         true_false(subsystem_filter), true_false(tag_filter), true_false(use_bpf));
  60
  61         assert_se(sd_device_get_syspath(device, &syspath) >= 0);
  62
  63         assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
  64         assert_se(sd_device_monitor_set_description(monitor_server, "sender") >= 0);
  65         assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
  66
  67         assert_se(device_monitor_new_full(&monitor_client, MONITOR_GROUP_NONE, -1) >= 0);
  68         assert_se(sd_device_monitor_set_description(monitor_client, "receiver") >= 0);
  69         assert_se(device_monitor_allow_unicast_sender(monitor_client, monitor_server) >= 0);
  70         assert_se(sd_device_monitor_start(monitor_client, monitor_handler, (void *) syspath) >= 0);
  71
  72         if (subsystem_filter) {
  73                 assert_se(sd_device_get_subsystem(device, &subsystem) >= 0);
  74                 (void) sd_device_get_devtype(device, &devtype);
  75                 assert_se(sd_device_monitor_filter_add_match_subsystem_devtype(monitor_client, subsystem, devtype) >= 0);
  76         }
  77
  78         if (tag_filter)
  79                 FOREACH_DEVICE_TAG(device, tag)
  80                         assert_se(sd_device_monitor_filter_add_match_tag(monitor_client, tag) >= 0);
  81
  82         if ((subsystem_filter || tag_filter) && use_bpf)
  83                 assert_se(sd_device_monitor_filter_update(monitor_client) >= 0);
  84
  85         assert_se(device_monitor_send_device(monitor_server, monitor_client, device) >= 0);
  86         assert_se(sd_event_loop(sd_device_monitor_get_event(monitor_client)) == 100);
  87 }
  88
  89 static void test_subsystem_filter(sd_device *device) {
  90         _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
  91         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
  92         const char *syspath, *subsystem;
  93
  94         log_device_info(device, "/* %s */", __func__);
  95
  96         assert_se(sd_device_get_syspath(device, &syspath) >= 0);
  97         assert_se(sd_device_get_subsystem(device, &subsystem) >= 0);
  98
  99         assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
 100         assert_se(sd_device_monitor_set_description(monitor_server, "sender") >= 0);
 101         assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
 102
 103         assert_se(device_monitor_new_full(&monitor_client, MONITOR_GROUP_NONE, -1) >= 0);
 104         assert_se(sd_device_monitor_set_description(monitor_client, "receiver") >= 0);
 105         assert_se(device_monitor_allow_unicast_sender(monitor_client, monitor_server) >= 0);
 106         assert_se(sd_device_monitor_filter_add_match_subsystem_devtype(monitor_client, subsystem, NULL) >= 0);
 107         assert_se(sd_device_monitor_start(monitor_client, monitor_handler, (void *) syspath) >= 0);
 108
 109         assert_se(sd_device_enumerator_new(&e) >= 0);
 110         assert_se(sd_device_enumerator_add_match_subsystem(e, subsystem, false) >= 0);
 111         FOREACH_DEVICE(e, d) {
 112                 const char *p, *s;
 113
 114                 assert_se(sd_device_get_syspath(d, &p) >= 0);
 115                 assert_se(sd_device_get_subsystem(d, &s) >= 0);
 116
 117                 assert_se(device_add_property(d, "ACTION", "add") >= 0);
 118                 assert_se(device_add_property(d, "SEQNUM", "10") >= 0);
 119
 120                 log_device_debug(d, "Sending device subsystem:%s syspath:%s", s, p);
 121                 assert_se(device_monitor_send_device(monitor_server, monitor_client, d) >= 0);
 122         }
 123
 124         log_device_info(device, "Sending device subsystem:%s syspath:%s", subsystem, syspath);
 125         assert_se(device_monitor_send_device(monitor_server, monitor_client, device) >= 0);
 126         assert_se(sd_event_loop(sd_device_monitor_get_event(monitor_client)) == 100);
 127 }
 128
 129 static void test_tag_filter(sd_device *device) {
 130         _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
 131         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
 132         const char *syspath;
 133
 134         log_device_info(device, "/* %s */", __func__);
 135
 136         assert_se(sd_device_get_syspath(device, &syspath) >= 0);
 137
 138         assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
 139         assert_se(sd_device_monitor_set_description(monitor_server, "sender") >= 0);
 140         assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
 141
 142         assert_se(device_monitor_new_full(&monitor_client, MONITOR_GROUP_NONE, -1) >= 0);
 143         assert_se(sd_device_monitor_set_description(monitor_client, "receiver") >= 0);
 144         assert_se(device_monitor_allow_unicast_sender(monitor_client, monitor_server) >= 0);
 145         assert_se(sd_device_monitor_filter_add_match_tag(monitor_client, "TEST_SD_DEVICE_MONITOR") >= 0);
 146         assert_se(sd_device_monitor_start(monitor_client, monitor_handler, (void *) syspath) >= 0);
 147
 148         assert_se(sd_device_enumerator_new(&e) >= 0);
 149         FOREACH_DEVICE(e, d) {
 150                 const char *p;
 151
 152                 assert_se(sd_device_get_syspath(d, &p) >= 0);
 153
 154                 assert_se(device_add_property(d, "ACTION", "add") >= 0);
 155                 assert_se(device_add_property(d, "SEQNUM", "10") >= 0);
 156
 157                 log_device_debug(d, "Sending device syspath:%s", p);
 158                 assert_se(device_monitor_send_device(monitor_server, monitor_client, d) >= 0);
 159         }
 160
 161         log_device_info(device, "Sending device syspath:%s", syspath);
 162         assert_se(device_monitor_send_device(monitor_server, monitor_client, device) >= 0);
 163         assert_se(sd_event_loop(sd_device_monitor_get_event(monitor_client)) == 100);
 164
 165 }
 166
 167 static void test_sysattr_filter(sd_device *device, const char *sysattr) {
 168         _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
 169         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
 170         const char *syspath, *sysattr_value;
 171
 172         log_device_info(device, "/* %s(%s) */", __func__, sysattr);
 173
 174         assert_se(sd_device_get_syspath(device, &syspath) >= 0);
 175         assert_se(sd_device_get_sysattr_value(device, sysattr, &sysattr_value) >= 0);
 176
 177         assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
 178         assert_se(sd_device_monitor_set_description(monitor_server, "sender") >= 0);
 179         assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
 180
 181         assert_se(device_monitor_new_full(&monitor_client, MONITOR_GROUP_NONE, -1) >= 0);
 182         assert_se(sd_device_monitor_set_description(monitor_client, "receiver") >= 0);
 183         assert_se(device_monitor_allow_unicast_sender(monitor_client, monitor_server) >= 0);
 184         assert_se(sd_device_monitor_filter_add_match_sysattr(monitor_client, sysattr, sysattr_value, true) >= 0);
 185         assert_se(sd_device_monitor_start(monitor_client, monitor_handler, (void *) syspath) >= 0);
 186
 187         assert_se(sd_device_enumerator_new(&e) >= 0);
 188         assert_se(sd_device_enumerator_add_match_sysattr(e, sysattr, sysattr_value, false) >= 0);
 189         FOREACH_DEVICE(e, d) {
 190                 const char *p;
 191
 192                 assert_se(sd_device_get_syspath(d, &p) >= 0);
 193
 194                 assert_se(device_add_property(d, "ACTION", "add") >= 0);
 195                 assert_se(device_add_property(d, "SEQNUM", "10") >= 0);
 196
 197                 log_device_debug(d, "Sending device syspath:%s", p);
 198                 assert_se(device_monitor_send_device(monitor_server, monitor_client, d) >= 0);
 199
 200                 /* The sysattr filter is not implemented in BPF yet. So, sending multiple devices may fills up
 201                  * buffer and device_monitor_send_device() may return EAGAIN. Let's send one device here,
 202                  * which should be filtered out by the receiver. */
 203                 break;
 204         }
 205
 206         log_device_info(device, "Sending device syspath:%s", syspath);
 207         assert_se(device_monitor_send_device(monitor_server, monitor_client, device) >= 0);
 208         assert_se(sd_event_loop(sd_device_monitor_get_event(monitor_client)) == 100);
 209
 210 }
 211
 212 static void test_parent_filter(sd_device *device) {
 213         _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
 214         _cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
 215         const char *syspath, *parent_syspath;
 216         sd_device *parent;
 217         int r;
 218
 219         log_device_info(device, "/* %s */", __func__);
 220
 221         assert_se(sd_device_get_syspath(device, &syspath) >= 0);
 222         r = sd_device_get_parent(device, &parent);
 223         if (r < 0)
 224                 return (void) log_device_info(device, "Device does not have parent, skipping.");
 225         assert_se(sd_device_get_syspath(parent, &parent_syspath) >= 0);
 226
 227         assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
 228         assert_se(sd_device_monitor_set_description(monitor_server, "sender") >= 0);
 229         assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
 230
 231         assert_se(device_monitor_new_full(&monitor_client, MONITOR_GROUP_NONE, -1) >= 0);
 232         assert_se(sd_device_monitor_set_description(monitor_client, "receiver") >= 0);
 233         assert_se(device_monitor_allow_unicast_sender(monitor_client, monitor_server) >= 0);
 234         assert_se(sd_device_monitor_filter_add_match_parent(monitor_client, parent, true) >= 0);
 235         assert_se(sd_device_monitor_start(monitor_client, monitor_handler, (void *) syspath) >= 0);
 236
 237         assert_se(sd_device_enumerator_new(&e) >= 0);
 238         FOREACH_DEVICE(e, d) {
 239                 const char *p;
 240
 241                 assert_se(sd_device_get_syspath(d, &p) >= 0);
 242                 if (path_startswith(p, parent_syspath))
 243                         continue;
 244
 245                 assert_se(device_add_property(d, "ACTION", "add") >= 0);
 246                 assert_se(device_add_property(d, "SEQNUM", "10") >= 0);
 247
 248                 log_device_debug(d, "Sending device syspath:%s", p);
 249                 assert_se(device_monitor_send_device(monitor_server, monitor_client, d) >= 0);
 250
 251                 /* The parent filter is not implemented in BPF yet. So, sending multiple devices may fills up
 252                  * buffer and device_monitor_send_device() may return EAGAIN. Let's send one device here,
 253                  * which should be filtered out by the receiver. */
 254                 break;
 255         }
 256
 257         log_device_info(device, "Sending device syspath:%s", syspath);
 258         assert_se(device_monitor_send_device(monitor_server, monitor_client, device) >= 0);
 259         assert_se(sd_event_loop(sd_device_monitor_get_event(monitor_client)) == 100);
 260
 261 }
 262
 263 static void test_sd_device_monitor_filter_remove(sd_device *device) {
 264         _cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
 265         const char *syspath;
 266
 267         log_device_info(device, "/* %s */", __func__);
 268
 269         assert_se(sd_device_get_syspath(device, &syspath) >= 0);
 270
 271         assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
 272         assert_se(sd_device_monitor_set_description(monitor_server, "sender") >= 0);
 273         assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
 274
 275         assert_se(device_monitor_new_full(&monitor_client, MONITOR_GROUP_NONE, -1) >= 0);
 276         assert_se(sd_device_monitor_set_description(monitor_client, "receiver") >= 0);
 277         assert_se(device_monitor_allow_unicast_sender(monitor_client, monitor_server) >= 0);
 278         assert_se(sd_device_monitor_start(monitor_client, monitor_handler, (void *) syspath) >= 0);
 279
 280         assert_se(sd_device_monitor_filter_add_match_subsystem_devtype(monitor_client, "hoge", NULL) >= 0);
 281         assert_se(sd_device_monitor_filter_update(monitor_client) >= 0);
 282
 283         assert_se(device_monitor_send_device(monitor_server, monitor_client, device) >= 0);
 284         assert_se(sd_event_run(sd_device_monitor_get_event(monitor_client), 0) >= 0);
 285
 286         assert_se(sd_device_monitor_filter_remove(monitor_client) >= 0);
 287
 288         assert_se(device_monitor_send_device(monitor_server, monitor_client, device) >= 0);
 289         assert_se(sd_event_loop(sd_device_monitor_get_event(monitor_client)) == 100);
 290 }
 291
 292 int main(int argc, char *argv[]) {
 293         _cleanup_(sd_device_unrefp) sd_device *loopback = NULL, *sda = NULL;
 294         int r;
 295
 296         test_setup_logging(LOG_INFO);
 297
 298         if (getuid() != 0)
 299                 return log_tests_skipped("not root");
 300
 301         if (path_is_read_only_fs("/sys") > 0)
 302                 return log_tests_skipped("Running in container");
 303
 304         test_receive_device_fail();
 305
 306         assert_se(sd_device_new_from_syspath(&loopback, "/sys/class/net/lo") >= 0);
 307         assert_se(device_add_property(loopback, "ACTION", "add") >= 0);
 308         assert_se(device_add_property(loopback, "SEQNUM", "10") >= 0);
 309         assert_se(device_add_tag(loopback, "TEST_SD_DEVICE_MONITOR", true) >= 0);
 310
 311         test_send_receive_one(loopback, false, false, false);
 312         test_send_receive_one(loopback,  true, false, false);
 313         test_send_receive_one(loopback, false,  true, false);
 314         test_send_receive_one(loopback,  true,  true, false);
 315         test_send_receive_one(loopback,  true, false,  true);
 316         test_send_receive_one(loopback, false,  true,  true);
 317         test_send_receive_one(loopback,  true,  true,  true);
 318
 319         test_subsystem_filter(loopback);
 320         test_tag_filter(loopback);
 321         test_sysattr_filter(loopback, "ifindex");
 322         test_sd_device_monitor_filter_remove(loopback);
 323
 324         r = sd_device_new_from_subsystem_sysname(&sda, "block", "sda");
 325         if (r < 0) {
 326                 log_info_errno(r, "Failed to create sd_device for sda, skipping remaining tests: %m");
 327                 return 0;
 328         }
 329
 330         assert_se(device_add_property(sda, "ACTION", "change") >= 0);
 331         assert_se(device_add_property(sda, "SEQNUM", "11") >= 0);
 332
 333         test_send_receive_one(sda, false, false, false);
 334         test_send_receive_one(sda,  true, false, false);
 335         test_send_receive_one(sda, false,  true, false);
 336         test_send_receive_one(sda,  true,  true, false);
 337         test_send_receive_one(sda,  true, false,  true);
 338         test_send_receive_one(sda, false,  true,  true);
 339         test_send_receive_one(sda,  true,  true,  true);
 340
 341         test_parent_filter(sda);
 342
 343         return 0;
 344 }