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Merge pull request #10886 from yuwata/sd-device-monitor-fix-filter

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sd-device: fix subsystem filter
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2018-11-23 08:53:33 +01:00 committed by GitHub
commit 7f22ad1083
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2 changed files with 46 additions and 31 deletions
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3
src/libsystemd/sd-device/device-monitor.c
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@ -648,13 +648,12 @@ _public_ int sd_device_monitor_filter_update(sd_device_monitor *m) {
/* jump if subsystem does not match */
bpf_jmp(ins, &i, BPF_JMP|BPF_JEQ|BPF_K, hash, 0, 1);
} else {
hash = string_hash32(devtype);
/* jump if subsystem does not match */
bpf_jmp(ins, &i, BPF_JMP|BPF_JEQ|BPF_K, hash, 0, 3);
/* load device devtype value in A */
bpf_stmt(ins, &i, BPF_LD|BPF_W|BPF_ABS, offsetof(monitor_netlink_header, filter_devtype_hash));
/* jump if value does not match */
hash = string_hash32(devtype);
bpf_jmp(ins, &i, BPF_JMP|BPF_JEQ|BPF_K, hash, 0, 1);
}

72
src/libsystemd/sd-device/test-sd-device-monitor.c
View File

@ -24,19 +24,15 @@ static int monitor_handler(sd_device_monitor *m, sd_device *d, void *userdata) {
return sd_event_exit(sd_device_monitor_get_event(m), 0);
}
static int test_loopback(bool subsystem_filter, bool tag_filter, bool use_bpf) {
static int test_send_receive_one(sd_device *device, bool subsystem_filter, bool tag_filter, bool use_bpf) {
_cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
_cleanup_(sd_device_unrefp) sd_device *loopback = NULL;
const char *syspath, *subsystem, *tag;
const char *syspath, *subsystem, *tag, *devtype = NULL;
int r;
log_info("/* %s(subsystem_filter=%s, tag_filter=%s, use_bpf=%s) */", __func__,
log_device_info(device, "/* %s(subsystem_filter=%s, tag_filter=%s, use_bpf=%s) */", __func__,
true_false(subsystem_filter), true_false(tag_filter), true_false(use_bpf));
assert_se(sd_device_new_from_syspath(&loopback, "/sys/class/net/lo") >= 0);
assert_se(sd_device_get_syspath(loopback, &syspath) >= 0);
assert_se(device_add_property(loopback, "ACTION", "add") >= 0);
assert_se(device_add_property(loopback, "SEQNUM", "10") >= 0);
assert_se(sd_device_get_syspath(device, &syspath) >= 0);
assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
@ -48,18 +44,20 @@ static int test_loopback(bool subsystem_filter, bool tag_filter, bool use_bpf) {
assert_se(sd_event_source_set_description(sd_device_monitor_get_event_source(monitor_client), "receiver") >= 0);
if (subsystem_filter) {
assert_se(sd_device_get_subsystem(loopback, &subsystem) >= 0);
assert_se(sd_device_monitor_filter_add_match_subsystem_devtype(monitor_client, subsystem, NULL) >= 0);
assert_se(sd_device_get_subsystem(device, &subsystem) >= 0);
(void) sd_device_get_devtype(device, &devtype);
assert_se(sd_device_monitor_filter_add_match_subsystem_devtype(monitor_client, subsystem, devtype) >= 0);
}
if (tag_filter)
FOREACH_DEVICE_TAG(loopback, tag)
FOREACH_DEVICE_TAG(device, tag)
assert_se(sd_device_monitor_filter_add_match_tag(monitor_client, tag) >= 0);
if ((subsystem_filter || tag_filter) && use_bpf)
assert_se(sd_device_monitor_filter_update(monitor_client) >= 0);
r = device_monitor_send_device(monitor_server, monitor_client, loopback);
/* Do not use assert_se() here. */
r = device_monitor_send_device(monitor_server, monitor_client, device);
if (r < 0)
return log_error_errno(r, "Failed to send loopback device: %m");
@ -68,20 +66,16 @@ static int test_loopback(bool subsystem_filter, bool tag_filter, bool use_bpf) {
return 0;
}
static void test_subsystem_filter(void) {
static void test_subsystem_filter(sd_device *device) {
_cleanup_(sd_device_monitor_unrefp) sd_device_monitor *monitor_server = NULL, *monitor_client = NULL;
_cleanup_(sd_device_enumerator_unrefp) sd_device_enumerator *e = NULL;
_cleanup_(sd_device_unrefp) sd_device *loopback = NULL;
const char *syspath, *subsystem, *p, *s;
sd_device *d;
log_info("/* %s */", __func__);
assert_se(sd_device_new_from_syspath(&loopback, "/sys/class/net/lo") >= 0);
assert_se(sd_device_get_syspath(loopback, &syspath) >= 0);
assert_se(sd_device_get_subsystem(loopback, &subsystem) >= 0);
assert_se(device_add_property(loopback, "ACTION", "add") >= 0);
assert_se(device_add_property(loopback, "SEQNUM", "10") >= 0);
assert_se(sd_device_get_syspath(device, &syspath) >= 0);
assert_se(sd_device_get_subsystem(device, &subsystem) >= 0);
assert_se(device_monitor_new_full(&monitor_server, MONITOR_GROUP_NONE, -1) >= 0);
assert_se(sd_device_monitor_start(monitor_server, NULL, NULL) >= 0);
@ -104,11 +98,12 @@ static void test_subsystem_filter(void) {
}
log_info("Sending device subsystem:%s syspath:%s", subsystem, syspath);
assert_se(device_monitor_send_device(monitor_server, monitor_client, loopback) >= 0);
assert_se(device_monitor_send_device(monitor_server, monitor_client, device) >= 0);
assert_se(sd_event_loop(sd_device_monitor_get_event(monitor_client)) == 0);
}
int main(int argc, char *argv[]) {
_cleanup_(sd_device_unrefp) sd_device *loopback = NULL, *sda = NULL;
int r;
test_setup_logging(LOG_INFO);
@ -116,20 +111,41 @@ int main(int argc, char *argv[]) {
if (getuid() != 0)
return log_tests_skipped("not root");
r = test_loopback(false, false, false);
assert_se(sd_device_new_from_syspath(&loopback, "/sys/class/net/lo") >= 0);
assert_se(device_add_property(loopback, "ACTION", "add") >= 0);
assert_se(device_add_property(loopback, "SEQNUM", "10") >= 0);
r = test_send_receive_one(loopback, false, false, false);
if (r < 0) {
assert_se(r == -EPERM && detect_container() > 0);
return log_tests_skipped("Running in container? Skipping remaining tests");
}
assert_se(test_loopback( true, false, false) >= 0);
assert_se(test_loopback(false, true, false) >= 0);
assert_se(test_loopback( true, true, false) >= 0);
assert_se(test_loopback( true, false, true) >= 0);
assert_se(test_loopback(false, true, true) >= 0);
assert_se(test_loopback( true, true, true) >= 0);
assert_se(test_send_receive_one(loopback, true, false, false) >= 0);
assert_se(test_send_receive_one(loopback, false, true, false) >= 0);
assert_se(test_send_receive_one(loopback, true, true, false) >= 0);
assert_se(test_send_receive_one(loopback, true, false, true) >= 0);
assert_se(test_send_receive_one(loopback, false, true, true) >= 0);
assert_se(test_send_receive_one(loopback, true, true, true) >= 0);
test_subsystem_filter();
test_subsystem_filter(loopback);
r = sd_device_new_from_subsystem_sysname(&sda, "block", "sda");
if (r < 0) {
log_info_errno(r, "Failed to create sd_device for sda, skipping remaining tests: %m");
return 0;
}
assert_se(device_add_property(sda, "ACTION", "change") >= 0);
assert_se(device_add_property(sda, "SEQNUM", "11") >= 0);
assert_se(test_send_receive_one(sda, false, false, false) >= 0);
assert_se(test_send_receive_one(sda, true, false, false) >= 0);
assert_se(test_send_receive_one(sda, false, true, false) >= 0);
assert_se(test_send_receive_one(sda, true, true, false) >= 0);
assert_se(test_send_receive_one(sda, true, false, true) >= 0);
assert_se(test_send_receive_one(sda, false, true, true) >= 0);
assert_se(test_send_receive_one(sda, true, true, true) >= 0);
return 0;
}