#define CI_FLAGS_IN_TREE (1<<0)
#define CI_FLAGS_IN_QUEUE (1<<1)
int flags;
-
+ pthread_cond_t flushed;
cache_item_t *next;
};
static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t cache_cond = PTHREAD_COND_INITIALIZER;
-static pthread_cond_t flush_cond = PTHREAD_COND_INITIALIZER;
-
static int config_write_interval = 300;
static int config_write_jitter = 0;
static int config_flush_interval = 3600;
+static int config_flush_at_shutdown = 0;
static char *config_pid_file = NULL;
static char *config_base_dir = NULL;
/*
* Functions
*/
-static void sig_int_handler (int s __attribute__((unused))) /* {{{ */
+static void sig_common (const char *sig) /* {{{ */
{
- RRDD_LOG(LOG_NOTICE, "caught SIGINT");
+ RRDD_LOG(LOG_NOTICE, "caught SIG%s", sig);
do_shutdown++;
pthread_cond_broadcast(&cache_cond);
+} /* }}} void sig_common */
+
+static void sig_int_handler (int s __attribute__((unused))) /* {{{ */
+{
+ sig_common("INT");
} /* }}} void sig_int_handler */
static void sig_term_handler (int s __attribute__((unused))) /* {{{ */
{
- RRDD_LOG(LOG_NOTICE, "caught SIGTERM");
- do_shutdown++;
- pthread_cond_broadcast(&cache_cond);
+ sig_common("TERM");
} /* }}} void sig_term_handler */
-static int write_pidfile (void) /* {{{ */
+static void sig_usr1_handler (int s __attribute__((unused))) /* {{{ */
+{
+ config_flush_at_shutdown = 1;
+ sig_common("USR1");
+} /* }}} void sig_usr1_handler */
+
+static void sig_usr2_handler (int s __attribute__((unused))) /* {{{ */
+{
+ config_flush_at_shutdown = 0;
+ sig_common("USR2");
+} /* }}} void sig_usr2_handler */
+
+static void install_signal_handlers(void) /* {{{ */
+{
+ /* These structures are static, because `sigaction' behaves weird if the are
+ * overwritten.. */
+ static struct sigaction sa_int;
+ static struct sigaction sa_term;
+ static struct sigaction sa_pipe;
+ static struct sigaction sa_usr1;
+ static struct sigaction sa_usr2;
+
+ /* Install signal handlers */
+ memset (&sa_int, 0, sizeof (sa_int));
+ sa_int.sa_handler = sig_int_handler;
+ sigaction (SIGINT, &sa_int, NULL);
+
+ memset (&sa_term, 0, sizeof (sa_term));
+ sa_term.sa_handler = sig_term_handler;
+ sigaction (SIGTERM, &sa_term, NULL);
+
+ memset (&sa_pipe, 0, sizeof (sa_pipe));
+ sa_pipe.sa_handler = SIG_IGN;
+ sigaction (SIGPIPE, &sa_pipe, NULL);
+
+ memset (&sa_pipe, 0, sizeof (sa_usr1));
+ sa_usr1.sa_handler = sig_usr1_handler;
+ sigaction (SIGUSR1, &sa_usr1, NULL);
+
+ memset (&sa_usr2, 0, sizeof (sa_usr2));
+ sa_usr2.sa_handler = sig_usr2_handler;
+ sigaction (SIGUSR2, &sa_usr2, NULL);
+
+} /* }}} void install_signal_handlers */
+
+static int open_pidfile(void) /* {{{ */
{
- pid_t pid;
- char *file;
int fd;
- FILE *fh;
+ char *file;
- pid = getpid ();
-
file = (config_pid_file != NULL)
? config_pid_file
: LOCALSTATEDIR "/run/rrdcached.pid";
fd = open(file, O_CREAT|O_EXCL|O_WRONLY, S_IRUSR|S_IRGRP|S_IROTH);
if (fd < 0)
- {
- RRDD_LOG(LOG_ERR, "FATAL: cannot create '%s' (%s)",
- file, rrd_strerror(errno));
- return (-1);
- }
+ fprintf(stderr, "FATAL: cannot create '%s' (%s)\n",
+ file, rrd_strerror(errno));
+
+ return(fd);
+}
+
+static int write_pidfile (int fd) /* {{{ */
+{
+ pid_t pid;
+ FILE *fh;
+
+ pid = getpid ();
fh = fdopen (fd, "w");
if (fh == NULL)
{
- RRDD_LOG (LOG_ERR, "write_pidfile: Opening `%s' failed.", file);
+ RRDD_LOG (LOG_ERR, "write_pidfile: fdopen() failed.");
close(fd);
return (-1);
}
if (did_insert)
{
+ pthread_cond_broadcast(&cache_cond);
pthread_mutex_lock (&stats_lock);
stats_queue_length++;
pthread_mutex_unlock (&stats_lock);
if (max_age > 0)
cfd.abs_timeout = cfd.now - max_age;
else
- cfd.abs_timeout = cfd.now + 1;
+ cfd.abs_timeout = cfd.now + 2*config_write_jitter + 1;
/* `tree_callback_flush' will return the keys of all values that haven't
* been touched in the last `config_flush_interval' seconds in `cfd'.
{
struct timeval now;
struct timespec next_flush;
+ int final_flush = 0; /* make sure we only flush once on shutdown */
gettimeofday (&now, NULL);
next_flush.tv_sec = now.tv_sec + config_flush_interval;
}
/* Now, check if there's something to store away. If not, wait until
- * something comes in or it's time to do the cache flush. */
- if (cache_queue_head == NULL)
+ * something comes in or it's time to do the cache flush. if we are
+ * shutting down, do not wait around. */
+ if (cache_queue_head == NULL && !do_shutdown)
{
status = pthread_cond_timedwait (&cache_cond, &cache_lock, &next_flush);
if ((status != 0) && (status != ETIMEDOUT))
}
}
- /* We're about to shut down, so lets flush the entire tree. */
- if ((do_shutdown != 0) && (cache_queue_head == NULL))
- flush_old_values (/* max age = */ -1);
+ /* We're about to shut down */
+ if (do_shutdown != 0 && !final_flush++)
+ {
+ if (config_flush_at_shutdown)
+ flush_old_values (-1); /* flush everything */
+ else
+ break;
+ }
/* Check if a value has arrived. This may be NULL if we timed out or there
* was an interrupt such as a signal. */
}
journal_write("wrote", file);
+ pthread_cond_broadcast(&ci->flushed);
for (i = 0; i < values_num; i++)
free (values[i]);
}
pthread_mutex_lock (&cache_lock);
- pthread_cond_broadcast (&flush_cond);
- /* We're about to shut down, so lets flush the entire tree. */
- if ((do_shutdown != 0) && (cache_queue_head == NULL))
- flush_old_values (/* max age = */ -1);
+ /* We're about to shut down */
+ if (do_shutdown != 0 && !final_flush++)
+ {
+ if (config_flush_at_shutdown)
+ flush_old_values (-1); /* flush everything */
+ else
+ break;
+ }
} /* while ((do_shutdown == 0) || (cache_queue_head != NULL)) */
pthread_mutex_unlock (&cache_lock);
- assert(cache_queue_head == NULL);
- RRDD_LOG(LOG_INFO, "clean shutdown; all RRDs flushed");
+ if (config_flush_at_shutdown)
+ {
+ assert(cache_queue_head == NULL);
+ RRDD_LOG(LOG_INFO, "clean shutdown; all RRDs flushed");
+ }
+
journal_done();
return (NULL);
/* Enqueue at head */
enqueue_cache_item (ci, HEAD);
- pthread_cond_signal (&cache_cond);
-
- while ((ci->flags & CI_FLAGS_IN_QUEUE) != 0)
- {
- ci = NULL;
- pthread_cond_wait (&flush_cond, &cache_lock);
-
- ci = g_tree_lookup (cache_tree, filename);
- if (ci == NULL)
- {
- RRDD_LOG (LOG_ERR, "flush_file: Tree node went away "
- "while waiting for flush.");
- pthread_mutex_unlock (&cache_lock);
- return (-1);
- }
- }
+ pthread_cond_wait(&ci->flushed, &cache_lock);
+ pthread_mutex_unlock(&cache_lock);
- pthread_mutex_unlock (&cache_lock);
return (0);
} /* }}} int flush_file */
char *help_help[] =
{
- "4 Command overview\n",
+ "5 Command overview\n",
"FLUSH <filename>\n",
+ "FLUSHALL\n",
"HELP [<command>]\n",
"UPDATE <filename> <values> [<values> ...]\n",
"STATS\n"
};
size_t help_flush_len = sizeof (help_flush) / sizeof (help_flush[0]);
+ char *help_flushall[] =
+ {
+ "3 Help for FLUSHALL\n",
+ "Usage: FLUSHALL\n",
+ "\n",
+ "Triggers writing of all pending updates. Returns immediately.\n"
+ };
+ size_t help_flushall_len = sizeof(help_flushall) / sizeof(help_flushall[0]);
+
char *help_update[] =
{
"9 Help for UPDATE\n",
help_text = help_flush;
help_text_len = help_flush_len;
}
+ else if (strcasecmp (command, "flushall") == 0)
+ {
+ help_text = help_flushall;
+ help_text_len = help_flushall_len;
+ }
else if (strcasecmp (command, "stats") == 0)
{
help_text = help_stats;
return (0);
} /* }}} int handle_request_flush */
+static int handle_request_flushall(int fd) /* {{{ */
+{
+ int status;
+ char answer[] ="0 Started flush.\n";
+
+ RRDD_LOG(LOG_DEBUG, "Received FLUSHALL");
+
+ pthread_mutex_lock(&cache_lock);
+ flush_old_values(-1);
+ pthread_mutex_unlock(&cache_lock);
+
+ status = swrite(fd, answer, strlen(answer));
+ if (status < 0)
+ {
+ status = errno;
+ RRDD_LOG(LOG_INFO, "handle_request_flushall: swrite returned an error.");
+ }
+
+ return (status);
+}
+
static int handle_request_update (int fd, /* {{{ */
char *buffer, size_t buffer_size)
{
pthread_mutex_unlock(&stats_lock);
pthread_mutex_lock (&cache_lock);
-
ci = g_tree_lookup (cache_tree, file);
+
if (ci == NULL) /* {{{ */
{
struct stat statbuf;
+ /* don't hold the lock while we setup; stat(2) might block */
+ pthread_mutex_unlock(&cache_lock);
+
memset (&statbuf, 0, sizeof (statbuf));
status = stat (file, &statbuf);
if (status != 0)
{
- pthread_mutex_unlock (&cache_lock);
RRDD_LOG (LOG_NOTICE, "handle_request_update: stat (%s) failed.", file);
status = errno;
}
if (!S_ISREG (statbuf.st_mode))
{
- pthread_mutex_unlock (&cache_lock);
-
snprintf (answer, sizeof (answer), "-1 Not a regular file: %s\n", file);
RRDD_UPDATE_SEND;
return (0);
}
if (access(file, R_OK|W_OK) != 0)
{
- pthread_mutex_unlock (&cache_lock);
-
snprintf (answer, sizeof (answer), "-1 Cannot read/write %s: %s\n",
file, rrd_strerror(errno));
RRDD_UPDATE_SEND;
ci = (cache_item_t *) malloc (sizeof (cache_item_t));
if (ci == NULL)
{
- pthread_mutex_unlock (&cache_lock);
RRDD_LOG (LOG_ERR, "handle_request_update: malloc failed.");
strncpy (answer, "-1 malloc failed.\n", sizeof (answer));
ci->file = strdup (file);
if (ci->file == NULL)
{
- pthread_mutex_unlock (&cache_lock);
free (ci);
RRDD_LOG (LOG_ERR, "handle_request_update: strdup failed.");
_wipe_ci_values(ci, now);
ci->flags = CI_FLAGS_IN_TREE;
+ pthread_mutex_lock(&cache_lock);
g_tree_insert (cache_tree, (void *) ci->file, (void *) ci);
} /* }}} */
assert (ci != NULL);
&& (ci->values_num > 0))
{
enqueue_cache_item (ci, TAIL);
- pthread_cond_signal (&cache_cond);
}
pthread_mutex_unlock (&cache_lock);
{
return (handle_request_flush (fd, buffer_ptr, buffer_size));
}
+ else if (strcasecmp (command, "flushall") == 0)
+ {
+ return (handle_request_flushall(fd));
+ }
else if (strcasecmp (command, "stats") == 0)
{
return (handle_request_stats (fd, buffer_ptr, buffer_size));
fclose(old_fh);
if (journal_fh == NULL)
+ {
RRDD_LOG(LOG_CRIT,
"JOURNALING DISABLED: Cannot open journal file '%s' : (%s)",
journal_cur, rrd_strerror(errno));
+ RRDD_LOG(LOG_ERR,
+ "JOURNALING DISABLED: All values will be flushed at shutdown");
+ config_flush_at_shutdown = 1;
+ }
+
} /* }}} static void journal_rotate */
static void journal_done(void) /* {{{ */
journal_fh = NULL;
}
- RRDD_LOG(LOG_INFO, "removing journals");
+ if (config_flush_at_shutdown)
+ {
+ RRDD_LOG(LOG_INFO, "removing journals");
+ unlink(journal_old);
+ unlink(journal_cur);
+ }
+ else
+ {
+ RRDD_LOG(LOG_INFO, "expedited shutdown; "
+ "journals will be used at next startup");
+ }
- unlink(journal_old);
- unlink(journal_cur);
pthread_mutex_unlock(&journal_lock);
} /* }}} static void journal_done */
pollfd.revents = 0;
status = poll (&pollfd, 1, /* timeout = */ 500);
- if (status == 0) /* timeout */
+ if (do_shutdown)
+ break;
+ else if (status == 0) /* timeout */
continue;
else if (status < 0) /* error */
{
status = handle_request (fd, buffer, /*buffer_size=*/ status);
if (status != 0)
- {
- close (fd);
break;
- }
}
+ close(fd);
+
self = pthread_self ();
/* Remove this thread from the connection threads list */
pthread_mutex_lock (&connection_threads_lock);
{
int fd;
listen_socket_t *temp;
+ int one = 1;
temp = (listen_socket_t *) realloc (listen_fds,
sizeof (listen_fds[0]) * (listen_fds_num + 1));
continue;
}
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
+
status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
if (status != 0)
{
pollfds[i].revents = 0;
}
- status = poll (pollfds, pollfds_num, /* timeout = */ -1);
- if (status < 1)
+ status = poll (pollfds, pollfds_num, /* timeout = */ 1000);
+ if (do_shutdown)
+ break;
+ else if (status == 0) /* timeout */
+ continue;
+ else if (status < 0) /* error */
{
status = errno;
if (status != EINTR)
static int daemonize (void) /* {{{ */
{
int status;
+ int fd;
- /* These structures are static, because `sigaction' behaves weird if the are
- * overwritten.. */
- static struct sigaction sa_int;
- static struct sigaction sa_term;
- static struct sigaction sa_pipe;
+ fd = open_pidfile();
+ if (fd < 0) return fd;
if (!stay_foreground)
{
dup (0);
} /* if (!stay_foreground) */
- /* Install signal handlers */
- memset (&sa_int, 0, sizeof (sa_int));
- sa_int.sa_handler = sig_int_handler;
- sigaction (SIGINT, &sa_int, NULL);
-
- memset (&sa_term, 0, sizeof (sa_term));
- sa_term.sa_handler = sig_term_handler;
- sigaction (SIGTERM, &sa_term, NULL);
-
- memset (&sa_pipe, 0, sizeof (sa_pipe));
- sa_pipe.sa_handler = SIG_IGN;
- sigaction (SIGPIPE, &sa_pipe, NULL);
+ install_signal_handlers();
openlog ("rrdcached", LOG_PID, LOG_DAEMON);
RRDD_LOG(LOG_INFO, "starting up");
return (-1);
}
- status = write_pidfile ();
+ status = write_pidfile (fd);
return status;
} /* }}} int daemonize */
int option;
int status = 0;
- while ((option = getopt(argc, argv, "gl:f:w:b:z:p:j:h?")) != -1)
+ while ((option = getopt(argc, argv, "gl:f:w:b:z:p:j:h?F")) != -1)
{
switch (option)
{
}
break;
+ case 'F':
+ config_flush_at_shutdown = 1;
+ break;
+
case 'j':
{
struct stat statbuf;
" -b <dir> Base directory to change to.\n"
" -g Do not fork and run in the foreground.\n"
" -j <dir> Directory in which to create the journal files.\n"
+ " -F Always flush all updates at shutdown\n"
"\n"
"For more information and a detailed description of all options "
"please refer\n"
fprintf(stderr, "WARNING: write delay (-z) should NOT be larger than"
" write interval (-w) !\n");
+ if (journal_cur == NULL)
+ config_flush_at_shutdown = 1;
+
return (status);
} /* }}} int read_options */
projects / rrdtool.git / blobdiff