/*
* Now for some includes..
*/
-#include "rrd.h" /* {{{ */
+/* {{{ */
+#if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__) && !defined(HAVE_CONFIG_H)
+#include "../win32/config.h"
+#else
+#ifdef HAVE_CONFIG_H
+#include "../rrd_config.h"
+#endif
+#endif
+
+#include "rrd.h"
#include "rrd_client.h"
#include <stdlib.h>
+
+#ifndef WIN32
#include <stdint.h>
-#include <stdio.h>
#include <unistd.h>
-#include <string.h>
#include <strings.h>
-#include <stdint.h>
#include <inttypes.h>
+# include <sys/socket.h>
+
+#else
+
+#endif
+#include <stdio.h>
+#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
-#include <sys/socket.h>
#include <sys/un.h>
#include <netdb.h>
#include <poll.h>
PRIV_HIGH
} socket_privilege;
+typedef enum { RESP_ERR = -1, RESP_OK = 0 } response_code;
+
struct listen_socket_s
{
int fd;
char addr[PATH_MAX + 1];
int family;
socket_privilege privilege;
+
+ /* state for BATCH processing */
+ time_t batch_start;
+ int batch_cmd;
+
+ /* buffered IO */
+ char *rbuf;
+ off_t next_cmd;
+ off_t next_read;
+
+ char *wbuf;
+ ssize_t wbuf_len;
};
typedef struct listen_socket_s listen_socket_t;
+struct command;
+/* note: guard against "unused" warnings in the handlers */
+#define DISPATCH_PROTO listen_socket_t *sock __attribute__((unused)),\
+ time_t now __attribute__((unused)),\
+ char *buffer __attribute__((unused)),\
+ size_t buffer_size __attribute__((unused))
+
+#define HANDLER_PROTO struct command *cmd __attribute__((unused)),\
+ DISPATCH_PROTO
+
+struct command {
+ char *cmd;
+ int (*handler)(HANDLER_PROTO);
+ socket_privilege min_priv;
+
+ char context; /* where we expect to see it */
+#define CMD_CONTEXT_CLIENT (1<<0)
+#define CMD_CONTEXT_BATCH (1<<1)
+#define CMD_CONTEXT_JOURNAL (1<<2)
+#define CMD_CONTEXT_ANY (0x7f)
+
+ char *syntax;
+ char *help;
+};
+
struct cache_item_s;
typedef struct cache_item_s cache_item_t;
struct cache_item_s
{
char *file;
char **values;
- int values_num;
+ size_t values_num;
time_t last_flush_time;
+ time_t last_update_stamp;
#define CI_FLAGS_IN_TREE (1<<0)
#define CI_FLAGS_IN_QUEUE (1<<1)
int flags;
/* max length of socket command or response */
#define CMD_MAX 4096
+#define RBUF_SIZE (CMD_MAX*2)
/*
* Variables
*/
static int stay_foreground = 0;
+static uid_t daemon_uid;
static listen_socket_t *listen_fds = NULL;
static size_t listen_fds_num = 0;
static int do_shutdown = 0;
-static pthread_t queue_thread;
+static pthread_t *queue_threads;
+static pthread_cond_t queue_cond = PTHREAD_COND_INITIALIZER;
+static int config_queue_threads = 4;
+
+static pthread_t flush_thread;
+static pthread_cond_t flush_cond = PTHREAD_COND_INITIALIZER;
-static pthread_t *connection_threads = NULL;
static pthread_mutex_t connection_threads_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t connection_threads_done = PTHREAD_COND_INITIALIZER;
static int connection_threads_num = 0;
/* Cache stuff */
static cache_item_t *cache_queue_head = NULL;
static cache_item_t *cache_queue_tail = NULL;
static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
-static pthread_cond_t cache_cond = PTHREAD_COND_INITIALIZER;
static int config_write_interval = 300;
static int config_write_jitter = 0;
static int config_write_base_only = 0;
static listen_socket_t **config_listen_address_list = NULL;
-static int config_listen_address_list_len = 0;
+static size_t config_listen_address_list_len = 0;
static uint64_t stats_queue_length = 0;
static uint64_t stats_updates_received = 0;
static void journal_done(void);
static void journal_rotate(void);
+/* prototypes for forward refernces */
+static int handle_request_help (HANDLER_PROTO);
+
/*
* Functions
*/
{
RRDD_LOG(LOG_NOTICE, "caught SIG%s", sig);
do_shutdown++;
- pthread_cond_broadcast(&cache_cond);
+ pthread_cond_broadcast(&flush_cond);
+ pthread_cond_broadcast(&queue_cond);
} /* }}} void sig_common */
static void sig_int_handler (int s __attribute__((unused))) /* {{{ */
} /* }}} void install_signal_handlers */
-static int open_pidfile(void) /* {{{ */
+static int open_pidfile(char *action, int oflag) /* {{{ */
{
int fd;
char *file;
? config_pid_file
: LOCALSTATEDIR "/run/rrdcached.pid";
- fd = open(file, O_CREAT|O_EXCL|O_WRONLY, S_IRUSR|S_IRGRP|S_IROTH);
+ fd = open(file, oflag, S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH);
if (fd < 0)
- fprintf(stderr, "FATAL: cannot create '%s' (%s)\n",
- file, rrd_strerror(errno));
+ fprintf(stderr, "rrdcached: can't %s pid file '%s' (%s)\n",
+ action, file, rrd_strerror(errno));
return(fd);
} /* }}} static int open_pidfile */
+/* check existing pid file to see whether a daemon is running */
+static int check_pidfile(void)
+{
+ int pid_fd;
+ pid_t pid;
+ char pid_str[16];
+
+ pid_fd = open_pidfile("open", O_RDWR);
+ if (pid_fd < 0)
+ return pid_fd;
+
+ if (read(pid_fd, pid_str, sizeof(pid_str)) <= 0)
+ return -1;
+
+ pid = atoi(pid_str);
+ if (pid <= 0)
+ return -1;
+
+ /* another running process that we can signal COULD be
+ * a competing rrdcached */
+ if (pid != getpid() && kill(pid, 0) == 0)
+ {
+ fprintf(stderr,
+ "FATAL: Another rrdcached daemon is running?? (pid %d)\n", pid);
+ close(pid_fd);
+ return -1;
+ }
+
+ lseek(pid_fd, 0, SEEK_SET);
+ if (ftruncate(pid_fd, 0) == -1)
+ {
+ fprintf(stderr,
+ "FATAL: Faild to truncate stale PID file. (pid %d)\n", pid);
+ close(pid_fd);
+ return -1;
+ }
+
+ fprintf(stderr,
+ "rrdcached: removed stale PID file (no rrdcached on pid %d)\n"
+ "rrdcached: starting normally.\n", pid);
+
+ return pid_fd;
+} /* }}} static int check_pidfile */
+
static int write_pidfile (int fd) /* {{{ */
{
pid_t pid;
return (errno);
} /* }}} int remove_pidfile */
-static ssize_t sread (int fd, void *buffer_void, size_t buffer_size) /* {{{ */
+static char *next_cmd (listen_socket_t *sock, ssize_t *len) /* {{{ */
{
- char *buffer;
- size_t buffer_used;
- size_t buffer_free;
- ssize_t status;
+ char *eol;
- buffer = (char *) buffer_void;
- buffer_used = 0;
- buffer_free = buffer_size;
+ eol = memchr(sock->rbuf + sock->next_cmd, '\n',
+ sock->next_read - sock->next_cmd);
- while (buffer_free > 0)
+ if (eol == NULL)
{
- status = read (fd, buffer + buffer_used, buffer_free);
- if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
- continue;
-
- if (status < 0)
- return (-1);
+ /* no commands left, move remainder back to front of rbuf */
+ memmove(sock->rbuf, sock->rbuf + sock->next_cmd,
+ sock->next_read - sock->next_cmd);
+ sock->next_read -= sock->next_cmd;
+ sock->next_cmd = 0;
+ *len = 0;
+ return NULL;
+ }
+ else
+ {
+ char *cmd = sock->rbuf + sock->next_cmd;
+ *eol = '\0';
- if (status == 0)
- return (0);
+ sock->next_cmd = eol - sock->rbuf + 1;
- assert ((0 > status) || (buffer_free >= (size_t) status));
+ if (eol > sock->rbuf && *(eol-1) == '\r')
+ *(--eol) = '\0'; /* handle "\r\n" EOL */
- buffer_free = buffer_free - status;
- buffer_used = buffer_used + status;
+ *len = eol - cmd;
- if (buffer[buffer_used - 1] == '\n')
- break;
+ return cmd;
}
- assert (buffer_used > 0);
+ /* NOTREACHED */
+ assert(1==0);
+}
- if (buffer[buffer_used - 1] != '\n')
+/* add the characters directly to the write buffer */
+static int add_to_wbuf(listen_socket_t *sock, char *str, size_t len) /* {{{ */
+{
+ char *new_buf;
+
+ assert(sock != NULL);
+
+ new_buf = rrd_realloc(sock->wbuf, sock->wbuf_len + len + 1);
+ if (new_buf == NULL)
{
- errno = ENOBUFS;
- return (-1);
+ RRDD_LOG(LOG_ERR, "add_to_wbuf: realloc failed");
+ return -1;
}
- buffer[buffer_used - 1] = 0;
+ strncpy(new_buf + sock->wbuf_len, str, len + 1);
+
+ sock->wbuf = new_buf;
+ sock->wbuf_len += len;
+
+ return 0;
+} /* }}} static int add_to_wbuf */
- /* Fix network line endings. */
- if ((buffer_used > 1) && (buffer[buffer_used - 2] == '\r'))
+/* add the text to the "extra" info that's sent after the status line */
+static int add_response_info(listen_socket_t *sock, char *fmt, ...) /* {{{ */
+{
+ va_list argp;
+ char buffer[CMD_MAX];
+ int len;
+
+ if (sock == NULL) return 0; /* journal replay mode */
+ if (sock->batch_start) return 0; /* no extra info returned when in BATCH */
+
+ va_start(argp, fmt);
+#ifdef HAVE_VSNPRINTF
+ len = vsnprintf(buffer, sizeof(buffer), fmt, argp);
+#else
+ len = vsprintf(buffer, fmt, argp);
+#endif
+ va_end(argp);
+ if (len < 0)
{
- buffer_used--;
- buffer[buffer_used - 1] = 0;
+ RRDD_LOG(LOG_ERR, "add_response_info: vnsprintf failed");
+ return -1;
}
- return (buffer_used);
-} /* }}} ssize_t sread */
+ return add_to_wbuf(sock, buffer, len);
+} /* }}} static int add_response_info */
-static ssize_t swrite (int fd, const void *buf, size_t count) /* {{{ */
+static int count_lines(char *str) /* {{{ */
{
- const char *ptr;
- size_t nleft;
- ssize_t status;
+ int lines = 0;
- /* special case for journal replay */
- if (fd < 0) return 0;
+ if (str != NULL)
+ {
+ while ((str = strchr(str, '\n')) != NULL)
+ {
+ ++lines;
+ ++str;
+ }
+ }
+
+ return lines;
+} /* }}} static int count_lines */
+
+/* send the response back to the user.
+ * returns 0 on success, -1 on error
+ * write buffer is always zeroed after this call */
+static int send_response (listen_socket_t *sock, response_code rc,
+ char *fmt, ...) /* {{{ */
+{
+ va_list argp;
+ char buffer[CMD_MAX];
+ int lines;
+ ssize_t wrote;
+ int rclen, len;
- ptr = (const char *) buf;
- nleft = count;
+ if (sock == NULL) return rc; /* journal replay mode */
- while (nleft > 0)
+ if (sock->batch_start)
{
- status = write (fd, (const void *) ptr, nleft);
+ if (rc == RESP_OK)
+ return rc; /* no response on success during BATCH */
+ lines = sock->batch_cmd;
+ }
+ else if (rc == RESP_OK)
+ lines = count_lines(sock->wbuf);
+ else
+ lines = -1;
+
+ rclen = sprintf(buffer, "%d ", lines);
+ va_start(argp, fmt);
+#ifdef HAVE_VSNPRINTF
+ len = vsnprintf(buffer+rclen, sizeof(buffer)-rclen, fmt, argp);
+#else
+ len = vsprintf(buffer+rclen, fmt, argp);
+#endif
+ va_end(argp);
+ if (len < 0)
+ return -1;
- if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
- continue;
+ len += rclen;
- if (status < 0)
- return (status);
+ /* append the result to the wbuf, don't write to the user */
+ if (sock->batch_start)
+ return add_to_wbuf(sock, buffer, len);
- nleft -= status;
- ptr += status;
+ /* first write must be complete */
+ if (len != write(sock->fd, buffer, len))
+ {
+ RRDD_LOG(LOG_INFO, "send_response: could not write status message");
+ return -1;
}
- return (0);
-} /* }}} ssize_t swrite */
+ if (sock->wbuf != NULL && rc == RESP_OK)
+ {
+ wrote = 0;
+ while (wrote < sock->wbuf_len)
+ {
+ ssize_t wb = write(sock->fd, sock->wbuf + wrote, sock->wbuf_len - wrote);
+ if (wb <= 0)
+ {
+ RRDD_LOG(LOG_INFO, "send_response: could not write results");
+ return -1;
+ }
+ wrote += wb;
+ }
+ }
+
+ free(sock->wbuf); sock->wbuf = NULL;
+ sock->wbuf_len = 0;
+
+ return 0;
+} /* }}} */
static void wipe_ci_values(cache_item_t *ci, time_t when)
{
ci->last_flush_time = when;
if (config_write_jitter > 0)
- ci->last_flush_time += (random() % config_write_jitter);
+ ci->last_flush_time += (rrd_random() % config_write_jitter);
}
/* remove_from_queue
static void remove_from_queue(cache_item_t *ci) /* {{{ */
{
if (ci == NULL) return;
+ if ((ci->flags & CI_FLAGS_IN_QUEUE) == 0) return; /* not queued */
if (ci->prev == NULL)
cache_queue_head = ci->next; /* reset head */
ci->next = ci->prev = NULL;
ci->flags &= ~CI_FLAGS_IN_QUEUE;
+
+ pthread_mutex_lock (&stats_lock);
+ assert (stats_queue_length > 0);
+ stats_queue_length--;
+ pthread_mutex_unlock (&stats_lock);
+
} /* }}} static void remove_from_queue */
+/* free the resources associated with the cache_item_t
+ * must hold cache_lock when calling this function
+ */
+static void *free_cache_item(cache_item_t *ci) /* {{{ */
+{
+ if (ci == NULL) return NULL;
+
+ remove_from_queue(ci);
+
+ for (size_t i=0; i < ci->values_num; i++)
+ free(ci->values[i]);
+
+ free (ci->values);
+ free (ci->file);
+
+ /* in case anyone is waiting */
+ pthread_cond_broadcast(&ci->flushed);
+ pthread_cond_destroy(&ci->flushed);
+
+ free (ci);
+
+ return NULL;
+} /* }}} static void *free_cache_item */
+
/*
* enqueue_cache_item:
* `cache_lock' must be acquired before calling this function!
if (cache_queue_head == ci)
return 0;
- /* remove from the double linked list */
- if (ci->flags & CI_FLAGS_IN_QUEUE)
- remove_from_queue(ci);
+ /* remove if further down in queue */
+ remove_from_queue(ci);
ci->prev = NULL;
ci->next = cache_queue_head;
ci->flags |= CI_FLAGS_IN_QUEUE;
- pthread_cond_broadcast(&cache_cond);
+ pthread_cond_signal(&queue_cond);
pthread_mutex_lock (&stats_lock);
stats_queue_length++;
pthread_mutex_unlock (&stats_lock);
/*
* tree_callback_flush:
- * Called via `g_tree_foreach' in `queue_thread_main'. `cache_lock' is held
+ * Called via `g_tree_foreach' in `flush_thread_main'. `cache_lock' is held
* while this is in progress.
*/
static gboolean tree_callback_flush (gpointer key, gpointer value, /* {{{ */
ci = (cache_item_t *) value;
cfd = (callback_flush_data_t *) data;
+ if (ci->flags & CI_FLAGS_IN_QUEUE)
+ return FALSE;
+
if ((ci->last_flush_time <= cfd->abs_timeout)
- && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
&& (ci->values_num > 0))
{
enqueue_cache_item (ci, TAIL);
}
else if ((do_shutdown != 0)
- && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
&& (ci->values_num > 0))
{
enqueue_cache_item (ci, TAIL);
}
else if (((cfd->now - ci->last_flush_time) >= config_flush_interval)
- && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
&& (ci->values_num <= 0))
{
- char **temp;
-
- temp = (char **) realloc (cfd->keys,
- sizeof (char *) * (cfd->keys_num + 1));
- if (temp == NULL)
+ assert ((char *) key == ci->file);
+ if (!rrd_add_ptr((void ***)&cfd->keys, &cfd->keys_num, (void *)key))
{
- RRDD_LOG (LOG_ERR, "tree_callback_flush: realloc failed.");
+ RRDD_LOG (LOG_ERR, "tree_callback_flush: rrd_add_ptrs failed.");
return (FALSE);
}
- cfd->keys = temp;
- /* Make really sure this points to the _same_ place */
- assert ((char *) key == ci->file);
- cfd->keys[cfd->keys_num] = (char *) key;
- cfd->keys_num++;
}
return (FALSE);
for (k = 0; k < cfd.keys_num; k++)
{
- cache_item_t *ci;
-
- /* This must not fail. */
- ci = (cache_item_t *) g_tree_lookup (cache_tree, cfd.keys[k]);
- assert (ci != NULL);
-
- /* If we end up here with values available, something's seriously
- * messed up. */
- assert (ci->values_num == 0);
-
- /* Remove the node from the tree */
- g_tree_remove (cache_tree, cfd.keys[k]);
- cfd.keys[k] = NULL;
-
- /* Now free and clean up `ci'. */
- free (ci->file);
- ci->file = NULL;
- free (ci);
- ci = NULL;
- } /* for (k = 0; k < cfd.keys_num; k++) */
+ /* should never fail, since we have held the cache_lock
+ * the entire time */
+ assert( g_tree_remove(cache_tree, cfd.keys[k]) == TRUE );
+ }
if (cfd.keys != NULL)
{
return (0);
} /* int flush_old_values */
-static void *queue_thread_main (void *args __attribute__((unused))) /* {{{ */
+static void *flush_thread_main (void *args __attribute__((unused))) /* {{{ */
{
struct timeval now;
struct timespec next_flush;
- int final_flush = 0; /* make sure we only flush once on shutdown */
+ int status;
gettimeofday (&now, NULL);
next_flush.tv_sec = now.tv_sec + config_flush_interval;
next_flush.tv_nsec = 1000 * now.tv_usec;
- pthread_mutex_lock (&cache_lock);
- while ((do_shutdown == 0) || (cache_queue_head != NULL))
- {
- cache_item_t *ci;
- char *file;
- char **values;
- int values_num;
- int status;
- int i;
+ pthread_mutex_lock(&cache_lock);
- /* First, check if it's time to do the cache flush. */
+ while (!do_shutdown)
+ {
gettimeofday (&now, NULL);
if ((now.tv_sec > next_flush.tv_sec)
|| ((now.tv_sec == next_flush.tv_sec)
flush_old_values (config_write_interval);
/* Determine the time of the next cache flush. */
- while (next_flush.tv_sec <= now.tv_sec)
- next_flush.tv_sec += config_flush_interval;
+ next_flush.tv_sec =
+ now.tv_sec + next_flush.tv_sec % config_flush_interval;
/* unlock the cache while we rotate so we don't block incoming
* updates if the fsync() blocks on disk I/O */
pthread_mutex_lock(&cache_lock);
}
+ status = pthread_cond_timedwait(&flush_cond, &cache_lock, &next_flush);
+ if (status != 0 && status != ETIMEDOUT)
+ {
+ RRDD_LOG (LOG_ERR, "flush_thread_main: "
+ "pthread_cond_timedwait returned %i.", status);
+ }
+ }
+
+ if (config_flush_at_shutdown)
+ flush_old_values (-1); /* flush everything */
+
+ pthread_mutex_unlock(&cache_lock);
+
+ return NULL;
+} /* void *flush_thread_main */
+
+static void *queue_thread_main (void *args __attribute__((unused))) /* {{{ */
+{
+ pthread_mutex_lock (&cache_lock);
+
+ while (!do_shutdown
+ || (cache_queue_head != NULL && config_flush_at_shutdown))
+ {
+ cache_item_t *ci;
+ char *file;
+ char **values;
+ size_t values_num;
+ int status;
+
/* 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 we are
- * shutting down, do not wait around. */
+ * something comes in. 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);
+ status = pthread_cond_wait (&queue_cond, &cache_lock);
if ((status != 0) && (status != ETIMEDOUT))
{
RRDD_LOG (LOG_ERR, "queue_thread_main: "
- "pthread_cond_timedwait returned %i.", status);
+ "pthread_cond_wait returned %i.", status);
}
}
- /* 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. */
if (cache_queue_head == NULL)
wipe_ci_values(ci, time(NULL));
remove_from_queue(ci);
- pthread_mutex_lock (&stats_lock);
- assert (stats_queue_length > 0);
- stats_queue_length--;
- pthread_mutex_unlock (&stats_lock);
-
pthread_mutex_unlock (&cache_lock);
rrd_clear_error ();
- status = rrd_update_r (file, NULL, values_num, (void *) values);
+ status = rrd_update_r (file, NULL, (int) values_num, (void *) values);
if (status != 0)
{
RRDD_LOG (LOG_NOTICE, "queue_thread_main: "
}
journal_write("wrote", file);
- pthread_cond_broadcast(&ci->flushed);
- for (i = 0; i < values_num; i++)
- free (values[i]);
+ /* Search again in the tree. It's possible someone issued a "FORGET"
+ * while we were writing the update values. */
+ pthread_mutex_lock(&cache_lock);
+ ci = (cache_item_t *) g_tree_lookup(cache_tree, file);
+ if (ci)
+ pthread_cond_broadcast(&ci->flushed);
+ pthread_mutex_unlock(&cache_lock);
- free(values);
+ rrd_free_ptrs((void ***) &values, &values_num);
free(file);
if (status == 0)
}
pthread_mutex_lock (&cache_lock);
-
- /* 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);
-
- if (config_flush_at_shutdown)
- {
- assert(cache_queue_head == NULL);
- RRDD_LOG(LOG_INFO, "clean shutdown; all RRDs flushed");
}
-
- journal_done();
+ pthread_mutex_unlock (&cache_lock);
return (NULL);
} /* }}} void *queue_thread_main */
* check whether the file falls within the dir
* returns 1 if OK, otherwise 0
*/
-static int check_file_access (const char *file, int fd) /* {{{ */
+static int check_file_access (const char *file, listen_socket_t *sock) /* {{{ */
{
- char error[CMD_MAX];
assert(file != NULL);
if (!config_write_base_only
- || fd < 0 /* journal replay */
+ || sock == NULL /* journal replay */
|| config_base_dir == NULL)
return 1;
return 1;
err:
- snprintf(error, sizeof(error)-1, "-1 %s\n", rrd_strerror(EACCES));
- swrite(fd, error, strlen(error));
+ if (sock != NULL && sock->fd >= 0)
+ send_response(sock, RESP_ERR, "%s\n", rrd_strerror(EACCES));
+
return 0;
} /* }}} static int check_file_access */
+/* when using a base dir, convert relative paths to absolute paths.
+ * if necessary, modifies the "filename" pointer to point
+ * to the new path created in "tmp". "tmp" is provided
+ * by the caller and sizeof(tmp) must be >= PATH_MAX.
+ *
+ * this allows us to optimize for the expected case (absolute path)
+ * with a no-op.
+ */
+static void get_abs_path(char **filename, char *tmp)
+{
+ assert(tmp != NULL);
+ assert(filename != NULL && *filename != NULL);
+
+ if (config_base_dir == NULL || **filename == '/')
+ return;
+
+ snprintf(tmp, PATH_MAX, "%s/%s", config_base_dir, *filename);
+ *filename = tmp;
+} /* }}} static int get_abs_path */
+
+/* returns 1 if we have the required privilege level,
+ * otherwise issue an error to the user on sock */
+static int has_privilege (listen_socket_t *sock, /* {{{ */
+ socket_privilege priv)
+{
+ if (sock == NULL) /* journal replay */
+ return 1;
+
+ if (sock->privilege >= priv)
+ return 1;
+
+ return send_response(sock, RESP_ERR, "%s\n", rrd_strerror(EACCES));
+} /* }}} static int has_privilege */
+
static int flush_file (const char *filename) /* {{{ */
{
cache_item_t *ci;
pthread_cond_wait(&ci->flushed, &cache_lock);
}
+ /* DO NOT DO ANYTHING WITH ci HERE!! The entry
+ * may have been purged during our cond_wait() */
+
pthread_mutex_unlock(&cache_lock);
return (0);
} /* }}} int flush_file */
-static int handle_request_help (int fd, /* {{{ */
- char *buffer, size_t buffer_size)
+static int syntax_error(listen_socket_t *sock, struct command *cmd) /* {{{ */
{
- int status;
- char **help_text;
- size_t help_text_len;
- char *command;
- size_t i;
+ char *err = "Syntax error.\n";
- char *help_help[] =
- {
- "5 Command overview\n",
- "FLUSH <filename>\n",
- "FLUSHALL\n",
- "HELP [<command>]\n",
- "UPDATE <filename> <values> [<values> ...]\n",
- "STATS\n"
- };
- size_t help_help_len = sizeof (help_help) / sizeof (help_help[0]);
-
- char *help_flush[] =
- {
- "4 Help for FLUSH\n",
- "Usage: FLUSH <filename>\n",
- "\n",
- "Adds the given filename to the head of the update queue and returns\n",
- "after is has been dequeued.\n"
- };
- size_t help_flush_len = sizeof (help_flush) / sizeof (help_flush[0]);
+ if (cmd && cmd->syntax)
+ err = cmd->syntax;
- 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",
- "Usage: UPDATE <filename> <values> [<values> ...]\n"
- "\n",
- "Adds the given file to the internal cache if it is not yet known and\n",
- "appends the given value(s) to the entry. See the rrdcached(1) manpage\n",
- "for details.\n",
- "\n",
- "Each <values> has the following form:\n",
- " <values> = <time>:<value>[:<value>[...]]\n",
- "See the rrdupdate(1) manpage for details.\n"
- };
- size_t help_update_len = sizeof (help_update) / sizeof (help_update[0]);
-
- char *help_stats[] =
- {
- "4 Help for STATS\n",
- "Usage: STATS\n",
- "\n",
- "Returns some performance counters, see the rrdcached(1) manpage for\n",
- "a description of the values.\n"
- };
- size_t help_stats_len = sizeof (help_stats) / sizeof (help_stats[0]);
+ return send_response(sock, RESP_ERR, "Usage: %s", err);
+} /* }}} static int syntax_error() */
- status = buffer_get_field (&buffer, &buffer_size, &command);
- if (status != 0)
- {
- help_text = help_help;
- help_text_len = help_help_len;
- }
- else
- {
- if (strcasecmp (command, "update") == 0)
- {
- help_text = help_update;
- help_text_len = help_update_len;
- }
- else if (strcasecmp (command, "flush") == 0)
- {
- 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;
- help_text_len = help_stats_len;
- }
- else
- {
- help_text = help_help;
- help_text_len = help_help_len;
- }
- }
-
- for (i = 0; i < help_text_len; i++)
- {
- status = swrite (fd, help_text[i], strlen (help_text[i]));
- if (status < 0)
- {
- status = errno;
- RRDD_LOG (LOG_ERR, "handle_request_help: swrite returned an error.");
- return (status);
- }
- }
-
- return (0);
-} /* }}} int handle_request_help */
-
-static int handle_request_stats (int fd, /* {{{ */
- char *buffer __attribute__((unused)),
- size_t buffer_size __attribute__((unused)))
+static int handle_request_stats (HANDLER_PROTO) /* {{{ */
{
- int status;
- char outbuf[CMD_MAX];
-
uint64_t copy_queue_length;
uint64_t copy_updates_received;
uint64_t copy_flush_received;
tree_depth = (uint64_t) g_tree_height (cache_tree);
pthread_mutex_unlock (&cache_lock);
-#define RRDD_STATS_SEND \
- outbuf[sizeof (outbuf) - 1] = 0; \
- status = swrite (fd, outbuf, strlen (outbuf)); \
- if (status < 0) \
- { \
- status = errno; \
- RRDD_LOG (LOG_INFO, "handle_request_stats: swrite returned an error."); \
- return (status); \
- }
-
- strncpy (outbuf, "9 Statistics follow\n", sizeof (outbuf));
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof (outbuf),
- "QueueLength: %"PRIu64"\n", copy_queue_length);
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof (outbuf),
- "UpdatesReceived: %"PRIu64"\n", copy_updates_received);
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof (outbuf),
- "FlushesReceived: %"PRIu64"\n", copy_flush_received);
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof (outbuf),
- "UpdatesWritten: %"PRIu64"\n", copy_updates_written);
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof (outbuf),
- "DataSetsWritten: %"PRIu64"\n", copy_data_sets_written);
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof (outbuf),
- "TreeNodesNumber: %"PRIu64"\n", tree_nodes_number);
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof (outbuf),
- "TreeDepth: %"PRIu64"\n", tree_depth);
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof(outbuf),
- "JournalBytes: %"PRIu64"\n", copy_journal_bytes);
- RRDD_STATS_SEND;
-
- snprintf (outbuf, sizeof(outbuf),
- "JournalRotate: %"PRIu64"\n", copy_journal_rotate);
- RRDD_STATS_SEND;
+ add_response_info(sock,
+ "QueueLength: %"PRIu64"\n", copy_queue_length);
+ add_response_info(sock,
+ "UpdatesReceived: %"PRIu64"\n", copy_updates_received);
+ add_response_info(sock,
+ "FlushesReceived: %"PRIu64"\n", copy_flush_received);
+ add_response_info(sock,
+ "UpdatesWritten: %"PRIu64"\n", copy_updates_written);
+ add_response_info(sock,
+ "DataSetsWritten: %"PRIu64"\n", copy_data_sets_written);
+ add_response_info(sock, "TreeNodesNumber: %"PRIu64"\n", tree_nodes_number);
+ add_response_info(sock, "TreeDepth: %"PRIu64"\n", tree_depth);
+ add_response_info(sock, "JournalBytes: %"PRIu64"\n", copy_journal_bytes);
+ add_response_info(sock, "JournalRotate: %"PRIu64"\n", copy_journal_rotate);
+
+ send_response(sock, RESP_OK, "Statistics follow\n");
return (0);
-#undef RRDD_STATS_SEND
} /* }}} int handle_request_stats */
-static int handle_request_flush (int fd, /* {{{ */
- char *buffer, size_t buffer_size)
+static int handle_request_flush (HANDLER_PROTO) /* {{{ */
{
- char *file;
+ char *file, file_tmp[PATH_MAX];
int status;
- char result[CMD_MAX];
status = buffer_get_field (&buffer, &buffer_size, &file);
if (status != 0)
{
- strncpy (result, "-1 Usage: flush <filename>\n", sizeof (result));
+ return syntax_error(sock,cmd);
}
else
{
stats_flush_received++;
pthread_mutex_unlock(&stats_lock);
- if (!check_file_access(file, fd)) return 0;
+ get_abs_path(&file, file_tmp);
+ if (!check_file_access(file, sock)) return 0;
status = flush_file (file);
if (status == 0)
- snprintf (result, sizeof (result), "0 Successfully flushed %s.\n", file);
+ return send_response(sock, RESP_OK, "Successfully flushed %s.\n", file);
else if (status == ENOENT)
{
/* no file in our tree; see whether it exists at all */
memset(&statbuf, 0, sizeof(statbuf));
if (stat(file, &statbuf) == 0 && S_ISREG(statbuf.st_mode))
- snprintf (result, sizeof (result), "0 Nothing to flush: %s.\n", file);
+ return send_response(sock, RESP_OK, "Nothing to flush: %s.\n", file);
else
- snprintf (result, sizeof (result), "-1 No such file: %s.\n", file);
+ return send_response(sock, RESP_ERR, "No such file: %s.\n", file);
}
else if (status < 0)
- strncpy (result, "-1 Internal error.\n", sizeof (result));
+ return send_response(sock, RESP_ERR, "Internal error.\n");
else
- snprintf (result, sizeof (result), "-1 Failed with status %i.\n", status);
+ return send_response(sock, RESP_ERR, "Failed with status %i.\n", status);
}
- result[sizeof (result) - 1] = 0;
- status = swrite (fd, result, strlen (result));
- if (status < 0)
+ /* NOTREACHED */
+ assert(1==0);
+} /* }}} int handle_request_flush */
+
+static int handle_request_flushall(HANDLER_PROTO) /* {{{ */
+{
+ RRDD_LOG(LOG_DEBUG, "Received FLUSHALL");
+
+ pthread_mutex_lock(&cache_lock);
+ flush_old_values(-1);
+ pthread_mutex_unlock(&cache_lock);
+
+ return send_response(sock, RESP_OK, "Started flush.\n");
+} /* }}} static int handle_request_flushall */
+
+static int handle_request_pending(HANDLER_PROTO) /* {{{ */
+{
+ int status;
+ char *file, file_tmp[PATH_MAX];
+ cache_item_t *ci;
+
+ status = buffer_get_field(&buffer, &buffer_size, &file);
+ if (status != 0)
+ return syntax_error(sock,cmd);
+
+ get_abs_path(&file, file_tmp);
+
+ pthread_mutex_lock(&cache_lock);
+ ci = g_tree_lookup(cache_tree, file);
+ if (ci == NULL)
{
- status = errno;
- RRDD_LOG (LOG_INFO, "handle_request_flush: swrite returned an error.");
- return (status);
+ pthread_mutex_unlock(&cache_lock);
+ return send_response(sock, RESP_ERR, "%s\n", rrd_strerror(ENOENT));
}
- return (0);
-} /* }}} int handle_request_slurp */
+ for (size_t i=0; i < ci->values_num; i++)
+ add_response_info(sock, "%s\n", ci->values[i]);
-static int handle_request_flushall(int fd) /* {{{ */
+ pthread_mutex_unlock(&cache_lock);
+ return send_response(sock, RESP_OK, "updates pending\n");
+} /* }}} static int handle_request_pending */
+
+static int handle_request_forget(HANDLER_PROTO) /* {{{ */
{
int status;
- char answer[] ="0 Started flush.\n";
+ gboolean found;
+ char *file, file_tmp[PATH_MAX];
- RRDD_LOG(LOG_DEBUG, "Received FLUSHALL");
+ status = buffer_get_field(&buffer, &buffer_size, &file);
+ if (status != 0)
+ return syntax_error(sock,cmd);
+
+ get_abs_path(&file, file_tmp);
+ if (!check_file_access(file, sock)) return 0;
pthread_mutex_lock(&cache_lock);
- flush_old_values(-1);
+ found = g_tree_remove(cache_tree, file);
pthread_mutex_unlock(&cache_lock);
- status = swrite(fd, answer, strlen(answer));
- if (status < 0)
+ if (found == TRUE)
{
- status = errno;
- RRDD_LOG(LOG_INFO, "handle_request_flushall: swrite returned an error.");
+ if (sock != NULL)
+ journal_write("forget", file);
+
+ return send_response(sock, RESP_OK, "Gone!\n");
}
+ else
+ return send_response(sock, RESP_ERR, "%s\n", rrd_strerror(ENOENT));
- return (status);
-} /* }}} static int handle_request_flushall */
+ /* NOTREACHED */
+ assert(1==0);
+} /* }}} static int handle_request_forget */
-static int handle_request_update (int fd, /* {{{ */
- char *buffer, size_t buffer_size)
+static int handle_request_queue (HANDLER_PROTO) /* {{{ */
{
- char *file;
+ cache_item_t *ci;
+
+ pthread_mutex_lock(&cache_lock);
+
+ ci = cache_queue_head;
+ while (ci != NULL)
+ {
+ add_response_info(sock, "%d %s\n", ci->values_num, ci->file);
+ ci = ci->next;
+ }
+
+ pthread_mutex_unlock(&cache_lock);
+
+ return send_response(sock, RESP_OK, "in queue.\n");
+} /* }}} int handle_request_queue */
+
+static int handle_request_update (HANDLER_PROTO) /* {{{ */
+{
+ char *file, file_tmp[PATH_MAX];
int values_num = 0;
int status;
-
- time_t now;
+ char orig_buf[CMD_MAX];
cache_item_t *ci;
- char answer[CMD_MAX];
-#define RRDD_UPDATE_SEND \
- answer[sizeof (answer) - 1] = 0; \
- status = swrite (fd, answer, strlen (answer)); \
- if (status < 0) \
- { \
- status = errno; \
- RRDD_LOG (LOG_INFO, "handle_request_update: swrite returned an error."); \
- return (status); \
- }
-
- now = time (NULL);
+ /* save it for the journal later */
+ strncpy(orig_buf, buffer, sizeof(orig_buf)-1);
status = buffer_get_field (&buffer, &buffer_size, &file);
if (status != 0)
- {
- strncpy (answer, "-1 Usage: UPDATE <filename> <values> [<values> ...]\n",
- sizeof (answer));
- RRDD_UPDATE_SEND;
- return (0);
- }
+ return syntax_error(sock,cmd);
pthread_mutex_lock(&stats_lock);
stats_updates_received++;
pthread_mutex_unlock(&stats_lock);
- if (!check_file_access(file, fd)) return 0;
+ get_abs_path(&file, file_tmp);
+ if (!check_file_access(file, sock)) return 0;
pthread_mutex_lock (&cache_lock);
ci = g_tree_lookup (cache_tree, file);
if (ci == NULL) /* {{{ */
{
struct stat statbuf;
+ cache_item_t *tmp;
/* don't hold the lock while we setup; stat(2) might block */
pthread_mutex_unlock(&cache_lock);
status = errno;
if (status == ENOENT)
- snprintf (answer, sizeof (answer), "-1 No such file: %s\n", file);
+ return send_response(sock, RESP_ERR, "No such file: %s\n", file);
else
- snprintf (answer, sizeof (answer), "-1 stat failed with error %i.\n",
- status);
- RRDD_UPDATE_SEND;
- return (0);
+ return send_response(sock, RESP_ERR,
+ "stat failed with error %i.\n", status);
}
if (!S_ISREG (statbuf.st_mode))
- {
- snprintf (answer, sizeof (answer), "-1 Not a regular file: %s\n", file);
- RRDD_UPDATE_SEND;
- return (0);
- }
+ return send_response(sock, RESP_ERR, "Not a regular file: %s\n", file);
+
if (access(file, R_OK|W_OK) != 0)
- {
- snprintf (answer, sizeof (answer), "-1 Cannot read/write %s: %s\n",
- file, rrd_strerror(errno));
- RRDD_UPDATE_SEND;
- return (0);
- }
+ return send_response(sock, RESP_ERR, "Cannot read/write %s: %s\n",
+ file, rrd_strerror(errno));
ci = (cache_item_t *) malloc (sizeof (cache_item_t));
if (ci == NULL)
{
RRDD_LOG (LOG_ERR, "handle_request_update: malloc failed.");
- strncpy (answer, "-1 malloc failed.\n", sizeof (answer));
- RRDD_UPDATE_SEND;
- return (0);
+ return send_response(sock, RESP_ERR, "malloc failed.\n");
}
memset (ci, 0, sizeof (cache_item_t));
free (ci);
RRDD_LOG (LOG_ERR, "handle_request_update: strdup failed.");
- strncpy (answer, "-1 strdup failed.\n", sizeof (answer));
- RRDD_UPDATE_SEND;
- return (0);
+ return send_response(sock, RESP_ERR, "strdup failed.\n");
}
wipe_ci_values(ci, now);
ci->flags = CI_FLAGS_IN_TREE;
+ pthread_cond_init(&ci->flushed, NULL);
pthread_mutex_lock(&cache_lock);
- g_tree_insert (cache_tree, (void *) ci->file, (void *) ci);
+
+ /* another UPDATE might have added this entry in the meantime */
+ tmp = g_tree_lookup (cache_tree, file);
+ if (tmp == NULL)
+ g_tree_replace (cache_tree, (void *) ci->file, (void *) ci);
+ else
+ {
+ free_cache_item (ci);
+ ci = tmp;
+ }
} /* }}} */
assert (ci != NULL);
+ /* don't re-write updates in replay mode */
+ if (sock != NULL)
+ journal_write("update", orig_buf);
+
while (buffer_size > 0)
{
- char **temp;
char *value;
+ time_t stamp;
+ char *eostamp;
status = buffer_get_field (&buffer, &buffer_size, &value);
if (status != 0)
break;
}
- temp = (char **) realloc (ci->values,
- sizeof (char *) * (ci->values_num + 1));
- if (temp == NULL)
+ /* make sure update time is always moving forward */
+ stamp = strtol(value, &eostamp, 10);
+ if (eostamp == value || eostamp == NULL || *eostamp != ':')
+ {
+ pthread_mutex_unlock(&cache_lock);
+ return send_response(sock, RESP_ERR,
+ "Cannot find timestamp in '%s'!\n", value);
+ }
+ else if (stamp <= ci->last_update_stamp)
{
- RRDD_LOG (LOG_ERR, "handle_request_update: realloc failed.");
- continue;
+ pthread_mutex_unlock(&cache_lock);
+ return send_response(sock, RESP_ERR,
+ "illegal attempt to update using time %ld when last"
+ " update time is %ld (minimum one second step)\n",
+ stamp, ci->last_update_stamp);
}
- ci->values = temp;
+ else
+ ci->last_update_stamp = stamp;
- ci->values[ci->values_num] = strdup (value);
- if (ci->values[ci->values_num] == NULL)
+ if (!rrd_add_strdup(&ci->values, &ci->values_num, value))
{
- RRDD_LOG (LOG_ERR, "handle_request_update: strdup failed.");
+ RRDD_LOG (LOG_ERR, "handle_request_update: rrd_add_strdup failed.");
continue;
}
- ci->values_num++;
values_num++;
}
pthread_mutex_unlock (&cache_lock);
if (values_num < 1)
- {
- strncpy (answer, "-1 No values updated.\n", sizeof (answer));
- }
+ return send_response(sock, RESP_ERR, "No values updated.\n");
else
- {
- snprintf (answer, sizeof (answer), "0 Enqueued %i value%s\n", values_num,
- (values_num == 1) ? "" : "s");
- }
- RRDD_UPDATE_SEND;
- return (0);
-#undef RRDD_UPDATE_SEND
+ return send_response(sock, RESP_OK,
+ "errors, enqueued %i value(s).\n", values_num);
+
+ /* NOTREACHED */
+ assert(1==0);
+
} /* }}} int handle_request_update */
/* we came across a "WROTE" entry during journal replay.
* throw away any values that we have accumulated for this file
*/
-static int handle_request_wrote (int fd __attribute__((unused)), /* {{{ */
- const char *buffer,
- size_t buffer_size __attribute__((unused)))
+static int handle_request_wrote (HANDLER_PROTO) /* {{{ */
{
- int i;
cache_item_t *ci;
const char *file = buffer;
}
if (ci->values)
- {
- for (i=0; i < ci->values_num; i++)
- free(ci->values[i]);
-
- free(ci->values);
- }
+ rrd_free_ptrs((void ***) &ci->values, &ci->values_num);
- wipe_ci_values(ci, time(NULL));
+ wipe_ci_values(ci, now);
remove_from_queue(ci);
pthread_mutex_unlock(&cache_lock);
return (0);
} /* }}} int handle_request_wrote */
-/* returns 1 if we have the required privilege level */
-static int has_privilege (socket_privilege priv, /* {{{ */
- socket_privilege required, int fd)
+/* start "BATCH" processing */
+static int batch_start (HANDLER_PROTO) /* {{{ */
{
int status;
- char error[CMD_MAX];
+ if (sock->batch_start)
+ return send_response(sock, RESP_ERR, "Already in BATCH\n");
- if (priv >= required)
- return 1;
+ status = send_response(sock, RESP_OK,
+ "Go ahead. End with dot '.' on its own line.\n");
+ sock->batch_start = time(NULL);
+ sock->batch_cmd = 0;
- sprintf(error, "-1 %s\n", rrd_strerror(EACCES));
- status = swrite(fd, error, strlen(error));
+ return status;
+} /* }}} static int batch_start */
- if (status < 0)
- return status;
- else
- return 0;
-} /* }}} static int has_privilege */
+/* finish "BATCH" processing and return results to the client */
+static int batch_done (HANDLER_PROTO) /* {{{ */
+{
+ assert(sock->batch_start);
+ sock->batch_start = 0;
+ sock->batch_cmd = 0;
+ return send_response(sock, RESP_OK, "errors\n");
+} /* }}} static int batch_done */
-/* if fd < 0, we are in journal replay mode */
-static int handle_request (int fd, socket_privilege privilege, /* {{{ */
- char *buffer, size_t buffer_size)
+static int handle_request_quit (HANDLER_PROTO) /* {{{ */
{
- char *buffer_ptr;
- char *command;
- int status;
+ return -1;
+} /* }}} static int handle_request_quit */
+
+struct command COMMANDS[] = {
+ {
+ "UPDATE",
+ handle_request_update,
+ PRIV_HIGH,
+ CMD_CONTEXT_ANY,
+ "UPDATE <filename> <values> [<values> ...]\n"
+ ,
+ "Adds the given file to the internal cache if it is not yet known and\n"
+ "appends the given value(s) to the entry. See the rrdcached(1) manpage\n"
+ "for details.\n"
+ "\n"
+ "Each <values> has the following form:\n"
+ " <values> = <time>:<value>[:<value>[...]]\n"
+ "See the rrdupdate(1) manpage for details.\n"
+ },
+ {
+ "WROTE",
+ handle_request_wrote,
+ PRIV_HIGH,
+ CMD_CONTEXT_JOURNAL,
+ NULL,
+ NULL
+ },
+ {
+ "FLUSH",
+ handle_request_flush,
+ PRIV_LOW,
+ CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
+ "FLUSH <filename>\n"
+ ,
+ "Adds the given filename to the head of the update queue and returns\n"
+ "after it has been dequeued.\n"
+ },
+ {
+ "FLUSHALL",
+ handle_request_flushall,
+ PRIV_HIGH,
+ CMD_CONTEXT_CLIENT,
+ "FLUSHALL\n"
+ ,
+ "Triggers writing of all pending updates. Returns immediately.\n"
+ },
+ {
+ "PENDING",
+ handle_request_pending,
+ PRIV_HIGH,
+ CMD_CONTEXT_CLIENT,
+ "PENDING <filename>\n"
+ ,
+ "Shows any 'pending' updates for a file, in order.\n"
+ "The updates shown have not yet been written to the underlying RRD file.\n"
+ },
+ {
+ "FORGET",
+ handle_request_forget,
+ PRIV_HIGH,
+ CMD_CONTEXT_ANY,
+ "FORGET <filename>\n"
+ ,
+ "Removes the file completely from the cache.\n"
+ "Any pending updates for the file will be lost.\n"
+ },
+ {
+ "QUEUE",
+ handle_request_queue,
+ PRIV_LOW,
+ CMD_CONTEXT_CLIENT,
+ "QUEUE\n"
+ ,
+ "Shows all files in the output queue.\n"
+ "The output is zero or more lines in the following format:\n"
+ "(where <num_vals> is the number of values to be written)\n"
+ "\n"
+ "<num_vals> <filename>\n"
+ },
+ {
+ "STATS",
+ handle_request_stats,
+ PRIV_LOW,
+ CMD_CONTEXT_CLIENT,
+ "STATS\n"
+ ,
+ "Returns some performance counters, see the rrdcached(1) manpage for\n"
+ "a description of the values.\n"
+ },
+ {
+ "HELP",
+ handle_request_help,
+ PRIV_LOW,
+ CMD_CONTEXT_CLIENT,
+ "HELP [<command>]\n",
+ NULL, /* special! */
+ },
+ {
+ "BATCH",
+ batch_start,
+ PRIV_LOW,
+ CMD_CONTEXT_CLIENT,
+ "BATCH\n"
+ ,
+ "The 'BATCH' command permits the client to initiate a bulk load\n"
+ " of commands to rrdcached.\n"
+ "\n"
+ "Usage:\n"
+ "\n"
+ " client: BATCH\n"
+ " server: 0 Go ahead. End with dot '.' on its own line.\n"
+ " client: command #1\n"
+ " client: command #2\n"
+ " client: ... and so on\n"
+ " client: .\n"
+ " server: 2 errors\n"
+ " server: 7 message for command #7\n"
+ " server: 9 message for command #9\n"
+ "\n"
+ "For more information, consult the rrdcached(1) documentation.\n"
+ },
+ {
+ ".", /* BATCH terminator */
+ batch_done,
+ PRIV_LOW,
+ CMD_CONTEXT_BATCH,
+ NULL,
+ NULL
+ },
+ {
+ "QUIT",
+ handle_request_quit,
+ PRIV_LOW,
+ CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
+ "QUIT\n"
+ ,
+ "Disconnect from rrdcached.\n"
+ },
+ {NULL,NULL,0,0,NULL,NULL} /* LAST ENTRY */
+};
- assert (buffer[buffer_size - 1] == '\0');
+static struct command *find_command(char *cmd)
+{
+ struct command *c = COMMANDS;
- buffer_ptr = buffer;
- command = NULL;
- status = buffer_get_field (&buffer_ptr, &buffer_size, &command);
- if (status != 0)
+ while (c->cmd != NULL)
{
- RRDD_LOG (LOG_INFO, "handle_request: Unable parse command.");
- return (-1);
+ if (strcasecmp(cmd, c->cmd) == 0)
+ break;
+ c++;
}
- if (strcasecmp (command, "update") == 0)
- {
- status = has_privilege(privilege, PRIV_HIGH, fd);
- if (status <= 0)
- return status;
+ if (c->cmd == NULL)
+ return NULL;
+ else
+ return c;
+}
- /* don't re-write updates in replay mode */
- if (fd >= 0)
- journal_write(command, buffer_ptr);
+/* check whether commands are received in the expected context */
+static int command_check_context(listen_socket_t *sock, struct command *cmd)
+{
+ if (sock == NULL)
+ return (cmd->context & CMD_CONTEXT_JOURNAL);
+ else if (sock->batch_start)
+ return (cmd->context & CMD_CONTEXT_BATCH);
+ else
+ return (cmd->context & CMD_CONTEXT_CLIENT);
- return (handle_request_update (fd, buffer_ptr, buffer_size));
- }
- else if (strcasecmp (command, "wrote") == 0 && fd < 0)
- {
- /* this is only valid in replay mode */
- return (handle_request_wrote (fd, buffer_ptr, buffer_size));
- }
- else if (strcasecmp (command, "flush") == 0)
- {
- return (handle_request_flush (fd, buffer_ptr, buffer_size));
- }
- else if (strcasecmp (command, "flushall") == 0)
- {
- status = has_privilege(privilege, PRIV_HIGH, fd);
- if (status <= 0)
- return status;
+ /* NOTREACHED */
+ assert(1==0);
+}
- return (handle_request_flushall(fd));
- }
- else if (strcasecmp (command, "stats") == 0)
- {
- return (handle_request_stats (fd, buffer_ptr, buffer_size));
- }
- else if (strcasecmp (command, "help") == 0)
+static int handle_request_help (HANDLER_PROTO) /* {{{ */
+{
+ int status;
+ char *cmd_str;
+ char *resp_txt;
+ struct command *help = NULL;
+
+ status = buffer_get_field (&buffer, &buffer_size, &cmd_str);
+ if (status == 0)
+ help = find_command(cmd_str);
+
+ if (help && (help->syntax || help->help))
{
- return (handle_request_help (fd, buffer_ptr, buffer_size));
+ char tmp[CMD_MAX];
+
+ snprintf(tmp, sizeof(tmp)-1, "Help for %s\n", help->cmd);
+ resp_txt = tmp;
+
+ if (help->syntax)
+ add_response_info(sock, "Usage: %s\n", help->syntax);
+
+ if (help->help)
+ add_response_info(sock, "%s\n", help->help);
}
else
{
- char result[CMD_MAX];
+ help = COMMANDS;
+ resp_txt = "Command overview\n";
- snprintf (result, sizeof (result), "-1 Unknown command: %s\n", command);
- result[sizeof (result) - 1] = 0;
-
- status = swrite (fd, result, strlen (result));
- if (status < 0)
+ while (help->cmd)
{
- RRDD_LOG (LOG_ERR, "handle_request: swrite failed.");
- return (-1);
+ if (help->syntax)
+ add_response_info(sock, "%s", help->syntax);
+ help++;
}
}
- return (0);
+ return send_response(sock, RESP_OK, resp_txt);
+} /* }}} int handle_request_help */
+
+/* if sock==NULL, we are in journal replay mode */
+static int handle_request (DISPATCH_PROTO) /* {{{ */
+{
+ char *buffer_ptr = buffer;
+ char *cmd_str = NULL;
+ struct command *cmd = NULL;
+ int status;
+
+ assert (buffer[buffer_size - 1] == '\0');
+
+ status = buffer_get_field (&buffer_ptr, &buffer_size, &cmd_str);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_INFO, "handle_request: Unable parse command.");
+ return (-1);
+ }
+
+ if (sock != NULL && sock->batch_start)
+ sock->batch_cmd++;
+
+ cmd = find_command(cmd_str);
+ if (!cmd)
+ return send_response(sock, RESP_ERR, "Unknown command: %s\n", cmd_str);
+
+ status = has_privilege(sock, cmd->min_priv);
+ if (status <= 0)
+ return status;
+
+ if (!command_check_context(sock, cmd))
+ return send_response(sock, RESP_ERR, "Can't use '%s' here.\n", cmd_str);
+
+ return cmd->handler(cmd, sock, now, buffer_ptr, buffer_size);
} /* }}} int handle_request */
/* MUST NOT hold journal_lock before calling this */
static void journal_rotate(void) /* {{{ */
{
FILE *old_fh = NULL;
+ int new_fd;
if (journal_cur == NULL || journal_old == NULL)
return;
if (journal_fh != NULL)
{
old_fh = journal_fh;
+ journal_fh = NULL;
rename(journal_cur, journal_old);
++stats_journal_rotate;
}
- journal_fh = fopen(journal_cur, "a");
+ new_fd = open(journal_cur, O_WRONLY|O_CREAT|O_APPEND,
+ S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+ if (new_fd >= 0)
+ {
+ journal_fh = fdopen(new_fd, "a");
+ if (journal_fh == NULL)
+ close(new_fd);
+ }
+
pthread_mutex_unlock(&journal_lock);
if (old_fh != NULL)
int fail_cnt = 0;
uint64_t line = 0;
char entry[CMD_MAX];
+ time_t now;
if (file == NULL) return 0;
+ {
+ char *reason = "unknown error";
+ int status = 0;
+ struct stat statbuf;
+
+ memset(&statbuf, 0, sizeof(statbuf));
+ if (stat(file, &statbuf) != 0)
+ {
+ if (errno == ENOENT)
+ return 0;
+
+ reason = "stat error";
+ status = errno;
+ }
+ else if (!S_ISREG(statbuf.st_mode))
+ {
+ reason = "not a regular file";
+ status = EPERM;
+ }
+ if (statbuf.st_uid != daemon_uid)
+ {
+ reason = "not owned by daemon user";
+ status = EACCES;
+ }
+ if (statbuf.st_mode & (S_IWGRP|S_IWOTH))
+ {
+ reason = "must not be user/group writable";
+ status = EACCES;
+ }
+
+ if (status != 0)
+ {
+ RRDD_LOG(LOG_ERR, "journal_replay: %s : %s (%s)",
+ file, rrd_strerror(status), reason);
+ return 0;
+ }
+ }
+
fh = fopen(file, "r");
if (fh == NULL)
{
else
RRDD_LOG(LOG_NOTICE, "replaying from journal: %s", file);
+ now = time(NULL);
+
while(!feof(fh))
{
size_t entry_len;
entry[entry_len - 1] = '\0';
- if (handle_request(-1, PRIV_HIGH, entry, entry_len) == 0)
+ if (handle_request(NULL, now, entry, entry_len) == 0)
++entry_cnt;
else
++fail_cnt;
fclose(fh);
- if (entry_cnt > 0)
+ RRDD_LOG(LOG_INFO, "Replayed %d entries (%d failures)",
+ entry_cnt, fail_cnt);
+
+ return entry_cnt > 0 ? 1 : 0;
+} /* }}} static int journal_replay */
+
+static void journal_init(void) /* {{{ */
+{
+ int had_journal = 0;
+
+ if (journal_cur == NULL) return;
+
+ pthread_mutex_lock(&journal_lock);
+
+ RRDD_LOG(LOG_INFO, "checking for journal files");
+
+ had_journal += journal_replay(journal_old);
+ had_journal += journal_replay(journal_cur);
+
+ /* it must have been a crash. start a flush */
+ if (had_journal && config_flush_at_shutdown)
+ flush_old_values(-1);
+
+ pthread_mutex_unlock(&journal_lock);
+ journal_rotate();
+
+ RRDD_LOG(LOG_INFO, "journal processing complete");
+
+} /* }}} static void journal_init */
+
+static void free_listen_socket(listen_socket_t *sock) /* {{{ */
+{
+ assert(sock != NULL);
+
+ free(sock->rbuf); sock->rbuf = NULL;
+ free(sock->wbuf); sock->wbuf = NULL;
+ free(sock);
+} /* }}} void free_listen_socket */
+
+static void close_connection(listen_socket_t *sock) /* {{{ */
+{
+ if (sock->fd >= 0)
{
- RRDD_LOG(LOG_INFO, "Replayed %d entries (%d failures)",
- entry_cnt, fail_cnt);
- return 1;
+ close(sock->fd);
+ sock->fd = -1;
}
- else
- return 0;
-} /* }}} static int journal_replay */
+ free_listen_socket(sock);
+
+} /* }}} void close_connection */
static void *connection_thread_main (void *args) /* {{{ */
{
- pthread_t self;
listen_socket_t *sock;
- int i;
int fd;
sock = (listen_socket_t *) args;
fd = sock->fd;
- pthread_mutex_lock (&connection_threads_lock);
+ /* init read buffers */
+ sock->next_read = sock->next_cmd = 0;
+ sock->rbuf = malloc(RBUF_SIZE);
+ if (sock->rbuf == NULL)
{
- pthread_t *temp;
-
- temp = (pthread_t *) realloc (connection_threads,
- sizeof (pthread_t) * (connection_threads_num + 1));
- if (temp == NULL)
- {
- RRDD_LOG (LOG_ERR, "connection_thread_main: realloc failed.");
- }
- else
- {
- connection_threads = temp;
- connection_threads[connection_threads_num] = pthread_self ();
- connection_threads_num++;
- }
+ RRDD_LOG(LOG_ERR, "connection_thread_main: cannot malloc read buffer");
+ close_connection(sock);
+ return NULL;
}
+
+ pthread_mutex_lock (&connection_threads_lock);
+ connection_threads_num++;
pthread_mutex_unlock (&connection_threads_lock);
while (do_shutdown == 0)
{
- char buffer[CMD_MAX];
+ char *cmd;
+ ssize_t cmd_len;
+ ssize_t rbytes;
+ time_t now;
struct pollfd pollfd;
int status;
else if (status < 0) /* error */
{
status = errno;
- if (status == EINTR)
- continue;
- RRDD_LOG (LOG_ERR, "connection_thread_main: poll(2) failed.");
+ if (status != EINTR)
+ RRDD_LOG (LOG_ERR, "connection_thread_main: poll(2) failed.");
continue;
}
if ((pollfd.revents & POLLHUP) != 0) /* normal shutdown */
- {
- close (fd);
break;
- }
else if ((pollfd.revents & (POLLIN | POLLPRI)) == 0)
{
RRDD_LOG (LOG_WARNING, "connection_thread_main: "
"poll(2) returned something unexpected: %#04hx",
pollfd.revents);
- close (fd);
break;
}
- status = (int) sread (fd, buffer, sizeof (buffer));
- if (status <= 0)
+ rbytes = read(fd, sock->rbuf + sock->next_read,
+ RBUF_SIZE - sock->next_read);
+ if (rbytes < 0)
{
- close (fd);
-
- if (status < 0)
- RRDD_LOG(LOG_ERR, "connection_thread_main: sread failed.");
-
+ RRDD_LOG(LOG_ERR, "connection_thread_main: read() failed.");
break;
}
+ else if (rbytes == 0)
+ break; /* eof */
- status = handle_request (fd, sock->privilege, buffer, status);
- if (status != 0)
- break;
+ sock->next_read += rbytes;
+
+ if (sock->batch_start)
+ now = sock->batch_start;
+ else
+ now = time(NULL);
+
+ while ((cmd = next_cmd(sock, &cmd_len)) != NULL)
+ {
+ status = handle_request (sock, now, cmd, cmd_len+1);
+ if (status != 0)
+ goto out_close;
+ }
}
- close(fd);
- free(args);
+out_close:
+ close_connection(sock);
- self = pthread_self ();
/* Remove this thread from the connection threads list */
pthread_mutex_lock (&connection_threads_lock);
- /* Find out own index in the array */
- for (i = 0; i < connection_threads_num; i++)
- if (pthread_equal (connection_threads[i], self) != 0)
- break;
- assert (i < connection_threads_num);
-
- /* Move the trailing threads forward. */
- if (i < (connection_threads_num - 1))
- {
- memmove (connection_threads + i,
- connection_threads + i + 1,
- sizeof (pthread_t) * (connection_threads_num - i - 1));
- }
-
connection_threads_num--;
+ if (connection_threads_num <= 0)
+ pthread_cond_broadcast(&connection_threads_done);
pthread_mutex_unlock (&connection_threads_lock);
return (NULL);
if (strncmp(path, "unix:", strlen("unix:")) == 0)
path += strlen("unix:");
- temp = (listen_socket_t *) realloc (listen_fds,
+ temp = (listen_socket_t *) rrd_realloc (listen_fds,
sizeof (listen_fds[0]) * (listen_fds_num + 1));
if (temp == NULL)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_unix: realloc failed.");
+ fprintf (stderr, "rrdcached: open_listen_socket_unix: realloc failed.\n");
return (-1);
}
listen_fds = temp;
fd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
if (fd < 0)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_unix: socket(2) failed.");
+ fprintf (stderr, "rrdcached: unix socket(2) failed: %s\n",
+ rrd_strerror(errno));
return (-1);
}
sa.sun_family = AF_UNIX;
strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
+ /* if we've gotten this far, we own the pid file. any daemon started
+ * with the same args must not be alive. therefore, ensure that we can
+ * create the socket...
+ */
+ unlink(path);
+
status = bind (fd, (struct sockaddr *) &sa, sizeof (sa));
if (status != 0)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_unix: bind(2) failed.");
+ fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
+ path, rrd_strerror(errno));
close (fd);
- unlink (path);
return (-1);
}
status = listen (fd, /* backlog = */ 10);
if (status != 0)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_unix: listen(2) failed.");
+ fprintf (stderr, "rrdcached: listen(%s) failed: %s.\n",
+ path, rrd_strerror(errno));
close (fd);
unlink (path);
return (-1);
char *port;
int status;
- strncpy (addr_copy, sock->addr, sizeof (addr_copy));
+ strncpy (addr_copy, sock->addr, sizeof(addr_copy)-1);
addr_copy[sizeof (addr_copy) - 1] = 0;
addr = addr_copy;
port = strchr (addr, ']');
if (port == NULL)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_network: Malformed address: %s",
- sock->addr);
+ fprintf (stderr, "rrdcached: Malformed address: %s\n", sock->addr);
return (-1);
}
*port = 0;
port = NULL;
else
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_network: Garbage after address: %s",
- port);
+ fprintf (stderr, "rrdcached: Garbage after address: %s\n", port);
return (-1);
}
} /* if (*addr = ']') */
&ai_hints, &ai_res);
if (status != 0)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_network: getaddrinfo(%s) failed: "
- "%s", addr, gai_strerror (status));
+ fprintf (stderr, "rrdcached: getaddrinfo(%s) failed: %s\n",
+ addr, gai_strerror (status));
return (-1);
}
listen_socket_t *temp;
int one = 1;
- temp = (listen_socket_t *) realloc (listen_fds,
+ temp = (listen_socket_t *) rrd_realloc (listen_fds,
sizeof (listen_fds[0]) * (listen_fds_num + 1));
if (temp == NULL)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_network: realloc failed.");
+ fprintf (stderr,
+ "rrdcached: open_listen_socket_network: realloc failed.\n");
continue;
}
listen_fds = temp;
fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
if (fd < 0)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_network: socket(2) failed.");
+ fprintf (stderr, "rrdcached: network socket(2) failed: %s.\n",
+ rrd_strerror(errno));
continue;
}
status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
if (status != 0)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_network: bind(2) failed.");
+ fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
+ sock->addr, rrd_strerror(errno));
close (fd);
continue;
}
status = listen (fd, /* backlog = */ 10);
if (status != 0)
{
- RRDD_LOG (LOG_ERR, "open_listen_socket_network: listen(2) failed.");
+ fprintf (stderr, "rrdcached: listen(%s) failed: %s\n.",
+ sock->addr, rrd_strerror(errno));
close (fd);
+ freeaddrinfo(ai_res);
return (-1);
}
listen_fds_num++;
} /* for (ai_ptr) */
+ freeaddrinfo(ai_res);
return (0);
} /* }}} static int open_listen_socket_network */
int status;
int i;
- for (i = 0; i < config_listen_address_list_len; i++)
- open_listen_socket (config_listen_address_list[i]);
-
- if (config_listen_address_list_len < 1)
- {
- listen_socket_t sock;
- memset(&sock, 0, sizeof(sock));
- strncpy(sock.addr, RRDCACHED_DEFAULT_ADDRESS, sizeof(sock.addr));
- open_listen_socket (&sock);
- }
-
if (listen_fds_num < 1)
{
- RRDD_LOG (LOG_ERR, "listen_thread_main: No listen sockets "
- "could be opened. Sorry.");
+ RRDD_LOG(LOG_ERR, "listen_thread_main: no listen_fds !");
return (NULL);
}
while (do_shutdown == 0)
{
- assert (pollfds_num == ((int) listen_fds_num));
for (i = 0; i < pollfds_num; i++)
{
pollfds[i].fd = listen_fds[i].fd;
if (status != 0)
{
RRDD_LOG (LOG_ERR, "listen_thread_main: pthread_create failed.");
- close (client_sock->fd);
- free (client_sock);
+ close_connection(client_sock);
continue;
}
} /* for (pollfds_num) */
pthread_mutex_lock (&connection_threads_lock);
while (connection_threads_num > 0)
- {
- pthread_t wait_for;
-
- wait_for = connection_threads[0];
-
- pthread_mutex_unlock (&connection_threads_lock);
- pthread_join (wait_for, /* retval = */ NULL);
- pthread_mutex_lock (&connection_threads_lock);
- }
+ pthread_cond_wait(&connection_threads_done, &connection_threads_lock);
pthread_mutex_unlock (&connection_threads_lock);
+ free(pollfds);
+
return (NULL);
} /* }}} void *listen_thread_main */
static int daemonize (void) /* {{{ */
{
- int status;
- int fd;
+ int pid_fd;
char *base_dir;
- fd = open_pidfile();
- if (fd < 0) return fd;
+ daemon_uid = geteuid();
+
+ pid_fd = open_pidfile("create", O_CREAT|O_EXCL|O_WRONLY);
+ if (pid_fd < 0)
+ pid_fd = check_pidfile();
+ if (pid_fd < 0)
+ return pid_fd;
+
+ /* open all the listen sockets */
+ if (config_listen_address_list_len > 0)
+ {
+ for (size_t i = 0; i < config_listen_address_list_len; i++)
+ open_listen_socket (config_listen_address_list[i]);
+
+ rrd_free_ptrs((void ***) &config_listen_address_list,
+ &config_listen_address_list_len);
+ }
+ else
+ {
+ listen_socket_t sock;
+ memset(&sock, 0, sizeof(sock));
+ strncpy(sock.addr, RRDCACHED_DEFAULT_ADDRESS, sizeof(sock.addr)-1);
+ open_listen_socket (&sock);
+ }
+
+ if (listen_fds_num < 1)
+ {
+ fprintf (stderr, "rrdcached: FATAL: cannot open any listen sockets\n");
+ goto error;
+ }
if (!stay_foreground)
{
if (child < 0)
{
fprintf (stderr, "daemonize: fork(2) failed.\n");
- return (-1);
+ goto error;
}
else if (child > 0)
- {
- return (1);
- }
+ exit(0);
/* Become session leader */
setsid ();
close (0);
open ("/dev/null", O_RDWR);
- dup (0);
- dup (0);
+ if (dup(0) == -1 || dup(0) == -1){
+ RRDD_LOG (LOG_ERR, "faild to run dup.\n");
+ }
} /* if (!stay_foreground) */
/* Change into the /tmp directory. */
base_dir = (config_base_dir != NULL)
? config_base_dir
: "/tmp";
- status = chdir (base_dir);
- if (status != 0)
+
+ if (chdir (base_dir) != 0)
{
fprintf (stderr, "daemonize: chdir (%s) failed.\n", base_dir);
- return (-1);
+ goto error;
}
install_signal_handlers();
openlog ("rrdcached", LOG_PID, LOG_DAEMON);
RRDD_LOG(LOG_INFO, "starting up");
- cache_tree = g_tree_new ((GCompareFunc) strcmp);
+ cache_tree = g_tree_new_full ((GCompareDataFunc) strcmp, NULL, NULL,
+ (GDestroyNotify) free_cache_item);
if (cache_tree == NULL)
{
RRDD_LOG (LOG_ERR, "daemonize: g_tree_new failed.");
- return (-1);
+ goto error;
}
- status = write_pidfile (fd);
- return status;
+ return write_pidfile (pid_fd);
+
+error:
+ remove_pidfile();
+ return -1;
} /* }}} int daemonize */
static int cleanup (void) /* {{{ */
{
do_shutdown++;
- pthread_cond_signal (&cache_cond);
- pthread_join (queue_thread, /* return = */ NULL);
+ pthread_cond_broadcast (&flush_cond);
+ pthread_join (flush_thread, NULL);
+
+ pthread_cond_broadcast (&queue_cond);
+ for (int i = 0; i < config_queue_threads; i++)
+ pthread_join (queue_threads[i], NULL);
+
+ if (config_flush_at_shutdown)
+ {
+ assert(cache_queue_head == NULL);
+ RRDD_LOG(LOG_INFO, "clean shutdown; all RRDs flushed");
+ }
+ journal_done();
remove_pidfile ();
+ free(queue_threads);
+ free(config_base_dir);
+ free(config_pid_file);
+ free(journal_cur);
+ free(journal_old);
+
+ pthread_mutex_lock(&cache_lock);
+ g_tree_destroy(cache_tree);
+
RRDD_LOG(LOG_INFO, "goodbye");
closelog ();
int option;
int status = 0;
- while ((option = getopt(argc, argv, "gl:L:f:w:b:Bz:p:j:h?F")) != -1)
+ while ((option = getopt(argc, argv, "gl:L:f:w:z:t:Bb:p:Fj:h?")) != -1)
{
switch (option)
{
case 'L':
case 'l':
{
- listen_socket_t **temp;
listen_socket_t *new;
new = malloc(sizeof(listen_socket_t));
}
memset(new, 0, sizeof(listen_socket_t));
- temp = (listen_socket_t **) realloc (config_listen_address_list,
- sizeof (listen_socket_t *) * (config_listen_address_list_len + 1));
- if (temp == NULL)
- {
- fprintf (stderr, "read_options: realloc failed.\n");
- return (2);
- }
- config_listen_address_list = temp;
-
strncpy(new->addr, optarg, sizeof(new->addr)-1);
new->privilege = (option == 'l') ? PRIV_HIGH : PRIV_LOW;
- temp[config_listen_address_list_len] = new;
- config_listen_address_list_len++;
+ if (!rrd_add_ptr((void ***)&config_listen_address_list,
+ &config_listen_address_list_len, new))
+ {
+ fprintf(stderr, "read_options: rrd_add_ptr failed.\n");
+ return (2);
+ }
}
break;
break;
}
+ case 't':
+ {
+ int threads;
+ threads = atoi(optarg);
+ if (threads >= 1)
+ config_queue_threads = threads;
+ else
+ {
+ fprintf (stderr, "Invalid thread count: -t %s\n", optarg);
+ return 1;
+ }
+ }
+ break;
+
case 'B':
config_write_base_only = 1;
break;
case 'b':
{
size_t len;
+ char base_realpath[PATH_MAX];
if (config_base_dir != NULL)
free (config_base_dir);
return (3);
}
+ /* make sure that the base directory is not resolved via
+ * symbolic links. this makes some performance-enhancing
+ * assumptions possible (we don't have to resolve paths
+ * that start with a "/")
+ */
+ if (realpath(config_base_dir, base_realpath) == NULL)
+ {
+ fprintf (stderr, "Invalid base directory '%s'.\n", config_base_dir);
+ return 5;
+ }
+ else if (strncmp(config_base_dir,
+ base_realpath, sizeof(base_realpath)) != 0)
+ {
+ fprintf(stderr,
+ "Base directory (-b) resolved via file system links!\n"
+ "Please consult rrdcached '-b' documentation!\n"
+ "Consider specifying the real directory (%s)\n",
+ base_realpath);
+ return 5;
+ }
+
len = strlen (config_base_dir);
while ((len > 0) && (config_base_dir[len - 1] == '/'))
{
" -L <address> Socket address to listen to ('FLUSH' only).\n"
" -w <seconds> Interval in which to write data.\n"
" -z <delay> Delay writes up to <delay> seconds to spread load\n"
+ " -t <threads> Number of write threads.\n"
" -f <seconds> Interval in which to flush dead data.\n"
" -p <file> Location of the PID-file.\n"
" -b <dir> Base directory to change to.\n"
}
status = daemonize ();
- if (status == 1)
+ if (status != 0)
{
- struct sigaction sigchld;
+ fprintf (stderr, "rrdcached: daemonize failed, exiting.\n");
+ return (1);
+ }
- memset (&sigchld, 0, sizeof (sigchld));
- sigchld.sa_handler = SIG_IGN;
- sigaction (SIGCHLD, &sigchld, NULL);
+ journal_init();
- return (0);
- }
- else if (status != 0)
+ /* start the queue threads */
+ queue_threads = calloc(config_queue_threads, sizeof(*queue_threads));
+ if (queue_threads == NULL)
{
- fprintf (stderr, "daemonize failed, exiting.\n");
+ RRDD_LOG (LOG_ERR, "FATAL: cannot calloc queue threads");
+ cleanup();
return (1);
}
-
- if (journal_cur != NULL)
+ for (int i = 0; i < config_queue_threads; i++)
{
- int had_journal = 0;
-
- pthread_mutex_lock(&journal_lock);
-
- RRDD_LOG(LOG_INFO, "checking for journal files");
-
- had_journal += journal_replay(journal_old);
- had_journal += journal_replay(journal_cur);
-
- if (had_journal)
- flush_old_values(-1);
-
- pthread_mutex_unlock(&journal_lock);
- journal_rotate();
-
- RRDD_LOG(LOG_INFO, "journal processing complete");
+ memset (&queue_threads[i], 0, sizeof (*queue_threads));
+ status = pthread_create (&queue_threads[i], NULL, queue_thread_main, NULL);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "FATAL: cannot create queue thread");
+ cleanup();
+ return (1);
+ }
}
- /* start the queue thread */
- memset (&queue_thread, 0, sizeof (queue_thread));
- status = pthread_create (&queue_thread,
- NULL, /* attr */
- queue_thread_main,
- NULL); /* args */
+ /* start the flush thread */
+ memset(&flush_thread, 0, sizeof(flush_thread));
+ status = pthread_create (&flush_thread, NULL, flush_thread_main, NULL);
if (status != 0)
{
- RRDD_LOG (LOG_ERR, "FATAL: cannot create queue thread");
+ RRDD_LOG (LOG_ERR, "FATAL: cannot create flush thread");
cleanup();
return (1);
}
projects / rrdtool.git / blobdiff