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add patch for 143 and code to check for known-bad/slow libevent versions. Needs more testing.

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svn:r4344
This commit is contained in:
Nick Mathewson 2005-06-08 13:53:19 +00:00
parent aff308e6d9
commit ec07e1195f
1 changed files with 88 additions and 21 deletions
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109
src/or/config.c
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@ -216,6 +216,9 @@ static int write_configuration_file(const char *fname, or_options_t *options);
static uint64_t config_parse_memunit(const char *s, int *ok);
static int config_parse_interval(const char *s, int *ok);
static void print_cvs_version(void);
static int init_libevent(void);
static void check_libevent_version(const char *m, const char *v, int server);
/*
* Functions to read and write the global options pointer.
@ -283,27 +286,6 @@ options_act(void) {
if (options->RunAsDaemon) {
start_daemon();
}
if (!libevent_initialized) {
configure_libevent_logging();
/* If the kernel complains that some method (say, epoll) doesn't
* exist, we don't care about it, since libevent will cope.
*/
suppress_libevent_log_msg("Function not implemented");
#ifdef __APPLE__
putenv("EVENT_NOKQUEUE=1");
#endif
event_init();
suppress_libevent_log_msg(NULL);
#if defined(HAVE_EVENT_GET_VERSION) && defined(HAVE_EVENT_GET_METHOD)
/* Making this a NOTICE for now so we can link bugs to a libevent versions
* or methods better. */
log(LOG_NOTICE, "Initialized libevent version %s using method %s",
event_get_version(), event_get_method());
#else
log(LOG_NOTICE, "Initialized old libevent (version 1.0b or earlier)");
#endif
libevent_initialized = 1;
}
clear_trusted_dir_servers();
for (cl = options->DirServers; cl; cl = cl->next) {
@ -342,12 +324,20 @@ options_act(void) {
mark_logs_temp(); /* Close current logs once new logs are open. */
if (config_init_logs(options, 0)<0) /* Configure the log(s) */
return -1;
/* Close the temporary log we used while starting up, if it isn't already
* gone. */
close_temp_logs();
add_callback_log(LOG_ERR, LOG_ERR, control_event_logmsg);
adjust_event_log_severity();
/* Set up libevent. */
if (!libevent_initialized) {
if (init_libevent())
return -1;
libevent_initialized = 1;
}
options->_ConnLimit =
set_max_file_descriptors((unsigned)options->ConnLimit, MAXCONNECTIONS);
if (options->_ConnLimit < 0)
@ -2619,6 +2609,83 @@ config_parse_interval(const char *s, int *ok) {
return (int)r;
}
/**
* Initialize the libevent library.
*/
static int
init_libevent(void)
{
configure_libevent_logging();
/* If the kernel complains that some method (say, epoll) doesn't
* exist, we don't care about it, since libevent will cope.
*/
suppress_libevent_log_msg("Function not implemented");
#ifdef __APPLE__
putenv("EVENT_NOKQUEUE=1");
#endif
event_init();
suppress_libevent_log_msg(NULL);
#if defined(HAVE_EVENT_GET_VERSION) && defined(HAVE_EVENT_GET_METHOD)
/* Making this a NOTICE for now so we can link bugs to a libevent versions
* or methods better. */
log(LOG_NOTICE, "Initialized libevent version %s using method %s",
event_get_version(), event_get_method());
check_libevent_version(event_get_method(), event_get_version(),
get_options()->ORPort != 0);
#else
log(LOG_NOTICE, "Initialized old libevent (version 1.0b or earlier)");
log(LOG_WARN, "You have a very old version of libevent. It is likely to be buggy; please consider building Tor with a more recent version.");
#endif
return 0;
}
/**
* Compare the given libevent method and version to a list of versions
* which are known not to work. Warn the user as appropriate.
*
*/
static void
check_libevent_version(const char *m, const char *v, int server)
{
int buggy = 0, iffy = 0, slow = 0;
tor_assert(m && v);
if (!strcmp(m, "kqueue")) {
if (!strcmp(v, "1.0c")) {
buggy = 1;
}
} else if (!strcmp(m, "epoll")) {
if (!strcmp(v, "1.0c") || !strcmp(v, "1.0d") || !strcmp(v, "1.0e"))
iffy = 1;
} else if (!strcmp(m, "poll")) {
if (!strcmp(v, "1.0c") || !strcmp(v, "1.0d"))
buggy = 1;
else if (!strcmp(v, "1.0e"))
slow = 1;
} else if (!strcmp(m, "poll")) {
if (!strcmp(v, "1.0c") || !strcmp(v, "1.0d") || !strcmp(v, "1.0e"))
slow = 1;
}
if (buggy) {
log(LOG_WARN,
"There are known bugs in using %s with libevent %s. "
"Please use the latest version of libevent.", m, v);
} else if (iffy) {
log(LOG_WARN,
"There are minor bugs in using %s with libevent %s. "
"You may want to use the latest version of libevent.", m, v);
} else if (slow && server) {
log(LOG_WARN,
c "libevent %s can be very slow with %s. "
"When running a server, please use the latest version of libevent.",v,m);
}
}
static void
print_cvs_version(void)
{