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Diffstat (limited to 'data/lighttpd/lighttpd-1.4.53/src/mod_rrdtool.c')
-rw-r--r--data/lighttpd/lighttpd-1.4.53/src/mod_rrdtool.c482
1 files changed, 482 insertions, 0 deletions
diff --git a/data/lighttpd/lighttpd-1.4.53/src/mod_rrdtool.c b/data/lighttpd/lighttpd-1.4.53/src/mod_rrdtool.c
new file mode 100644
index 000000000..009943d01
--- /dev/null
+++ b/data/lighttpd/lighttpd-1.4.53/src/mod_rrdtool.c
@@ -0,0 +1,482 @@
+#include "first.h"
+
+#include "base.h"
+#include "fdevent.h"
+#include "log.h"
+
+#include "plugin.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+
+typedef struct {
+ buffer *path_rrdtool_bin;
+ buffer *path_rrd;
+
+ double requests, *requests_ptr;
+ double bytes_written, *bytes_written_ptr;
+ double bytes_read, *bytes_read_ptr;
+} plugin_config;
+
+typedef struct {
+ PLUGIN_DATA;
+
+ buffer *cmd;
+ buffer *resp;
+
+ int read_fd, write_fd;
+ pid_t rrdtool_pid;
+ pid_t srv_pid;
+
+ int rrdtool_running;
+ time_t rrdtool_startup_ts;
+
+ plugin_config **config_storage;
+ plugin_config conf;
+} plugin_data;
+
+INIT_FUNC(mod_rrd_init) {
+ plugin_data *p;
+
+ p = calloc(1, sizeof(*p));
+
+ p->resp = buffer_init();
+ p->cmd = buffer_init();
+
+ return p;
+}
+
+FREE_FUNC(mod_rrd_free) {
+ plugin_data *p = p_d;
+ size_t i;
+
+ if (!p) return HANDLER_GO_ON;
+
+ if (p->config_storage) {
+ for (i = 0; i < srv->config_context->used; i++) {
+ plugin_config *s = p->config_storage[i];
+
+ if (NULL == s) continue;
+
+ buffer_free(s->path_rrdtool_bin);
+ buffer_free(s->path_rrd);
+
+ free(s);
+ }
+ }
+ buffer_free(p->cmd);
+ buffer_free(p->resp);
+
+ free(p->config_storage);
+
+ if (p->read_fd >= 0) close(p->read_fd);
+ if (p->write_fd >= 0) close(p->write_fd);
+
+ if (p->rrdtool_pid > 0 && p->srv_pid == srv->pid) {
+ /* collect status */
+ while (-1 == waitpid(p->rrdtool_pid, NULL, 0) && errno == EINTR) ;
+ }
+
+ free(p);
+
+ return HANDLER_GO_ON;
+}
+
+static int mod_rrd_create_pipe(server *srv, plugin_data *p) {
+ char *args[3];
+ int to_rrdtool_fds[2];
+ int from_rrdtool_fds[2];
+ /* mod_rrdtool does not work with server.max-workers > 0
+ * since the data between workers is not aggregated,
+ * and it is not valid to send data to rrdtool more than once a sec
+ * (which would happen with multiple workers writing to same pipe)
+ * If pipes were to be shared, then existing pipes would need to be
+ * reused here, if they already exist (not -1), and after flushing
+ * existing contents (read and discard from read-end of pipes). */
+ if (pipe(to_rrdtool_fds)) {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "pipe failed: ", strerror(errno));
+ return -1;
+ }
+ if (pipe(from_rrdtool_fds)) {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "pipe failed: ", strerror(errno));
+ return -1;
+ }
+ fdevent_setfd_cloexec(to_rrdtool_fds[1]);
+ fdevent_setfd_cloexec(from_rrdtool_fds[0]);
+ *(const char **)&args[0] = p->conf.path_rrdtool_bin->ptr;
+ *(const char **)&args[1] = "-";
+ args[2] = NULL;
+
+ p->rrdtool_pid = fdevent_fork_execve(args[0], args, NULL, to_rrdtool_fds[0], from_rrdtool_fds[1], -1, -1);
+
+ if (-1 != p->rrdtool_pid) {
+ close(from_rrdtool_fds[1]);
+ close(to_rrdtool_fds[0]);
+ if (p->read_fd >= 0) close(p->read_fd);
+ if (p->write_fd >= 0) close(p->write_fd);
+ p->write_fd = to_rrdtool_fds[1];
+ p->read_fd = from_rrdtool_fds[0];
+ p->srv_pid = srv->pid;
+ return 0;
+ } else {
+ log_error_write(srv, __FILE__, __LINE__, "SBss", "fork/exec(", p->conf.path_rrdtool_bin, "):", strerror(errno));
+ close(to_rrdtool_fds[0]);
+ close(to_rrdtool_fds[1]);
+ close(from_rrdtool_fds[0]);
+ close(from_rrdtool_fds[1]);
+ return -1;
+ }
+}
+
+/* read/write wrappers to catch EINTR */
+
+/* write to blocking socket; blocks until all data is sent, write returns 0 or an error (apart from EINTR) occurs. */
+static ssize_t safe_write(int fd, const void *buf, size_t count) {
+ ssize_t res, sum = 0;
+
+ for (;;) {
+ res = write(fd, buf, count);
+ if (res >= 0) {
+ sum += res;
+ /* do not try again if res == 0 */
+ if (res == 0 || (size_t) res == count) return sum;
+ count -= res;
+ buf = (const char*) buf + res;
+ continue;
+ }
+ switch (errno) {
+ case EINTR:
+ continue;
+ default:
+ return -1;
+ }
+ }
+}
+
+/* this assumes we get enough data on a successful read */
+static ssize_t safe_read(int fd, buffer *b) {
+ ssize_t res;
+
+ buffer_string_prepare_copy(b, 4095);
+
+ do {
+ res = read(fd, b->ptr, b->size-1);
+ } while (-1 == res && errno == EINTR);
+
+ if (res >= 0) buffer_commit(b, res);
+ return res;
+}
+
+static int mod_rrdtool_create_rrd(server *srv, plugin_data *p, plugin_config *s) {
+ struct stat st;
+
+ /* check if DB already exists */
+ if (0 == stat(s->path_rrd->ptr, &st)) {
+ /* check if it is plain file */
+ if (!S_ISREG(st.st_mode)) {
+ log_error_write(srv, __FILE__, __LINE__, "sb",
+ "not a regular file:", s->path_rrd);
+ return HANDLER_ERROR;
+ }
+
+ /* still create DB if it's empty file */
+ if (st.st_size > 0) {
+ return HANDLER_GO_ON;
+ }
+ }
+
+ /* create a new one */
+ buffer_copy_string_len(p->cmd, CONST_STR_LEN("create "));
+ buffer_append_string_buffer(p->cmd, s->path_rrd);
+ buffer_append_string_len(p->cmd, CONST_STR_LEN(
+ " --step 60 "
+ "DS:InOctets:ABSOLUTE:600:U:U "
+ "DS:OutOctets:ABSOLUTE:600:U:U "
+ "DS:Requests:ABSOLUTE:600:U:U "
+ "RRA:AVERAGE:0.5:1:600 "
+ "RRA:AVERAGE:0.5:6:700 "
+ "RRA:AVERAGE:0.5:24:775 "
+ "RRA:AVERAGE:0.5:288:797 "
+ "RRA:MAX:0.5:1:600 "
+ "RRA:MAX:0.5:6:700 "
+ "RRA:MAX:0.5:24:775 "
+ "RRA:MAX:0.5:288:797 "
+ "RRA:MIN:0.5:1:600 "
+ "RRA:MIN:0.5:6:700 "
+ "RRA:MIN:0.5:24:775 "
+ "RRA:MIN:0.5:288:797\n"));
+
+ if (-1 == (safe_write(p->write_fd, CONST_BUF_LEN(p->cmd)))) {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "rrdtool-write: failed", strerror(errno));
+
+ return HANDLER_ERROR;
+ }
+
+ if (-1 == safe_read(p->read_fd, p->resp)) {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "rrdtool-read: failed", strerror(errno));
+
+ return HANDLER_ERROR;
+ }
+
+ if (p->resp->ptr[0] != 'O' ||
+ p->resp->ptr[1] != 'K') {
+ log_error_write(srv, __FILE__, __LINE__, "sbb",
+ "rrdtool-response:", p->cmd, p->resp);
+
+ return HANDLER_ERROR;
+ }
+
+ return HANDLER_GO_ON;
+}
+
+#define PATCH(x) \
+ p->conf.x = s->x;
+static int mod_rrd_patch_connection(server *srv, connection *con, plugin_data *p) {
+ size_t i, j;
+ plugin_config *s = p->config_storage[0];
+
+ PATCH(path_rrdtool_bin);
+ PATCH(path_rrd);
+
+ p->conf.bytes_written_ptr = &(s->bytes_written);
+ p->conf.bytes_read_ptr = &(s->bytes_read);
+ p->conf.requests_ptr = &(s->requests);
+
+ /* skip the first, the global context */
+ for (i = 1; i < srv->config_context->used; i++) {
+ data_config *dc = (data_config *)srv->config_context->data[i];
+ s = p->config_storage[i];
+
+ /* condition didn't match */
+ if (!config_check_cond(srv, con, dc)) continue;
+
+ /* merge config */
+ for (j = 0; j < dc->value->used; j++) {
+ data_unset *du = dc->value->data[j];
+
+ if (buffer_is_equal_string(du->key, CONST_STR_LEN("rrdtool.db-name"))) {
+ PATCH(path_rrd);
+ /* get pointers to double values */
+
+ p->conf.bytes_written_ptr = &(s->bytes_written);
+ p->conf.bytes_read_ptr = &(s->bytes_read);
+ p->conf.requests_ptr = &(s->requests);
+ }
+ }
+ }
+
+ return 0;
+}
+#undef PATCH
+
+static int mod_rrd_exec(server *srv, plugin_data *p) {
+ if (mod_rrd_create_pipe(srv, p)) {
+ return -1;
+ }
+
+ p->rrdtool_running = 1;
+ p->rrdtool_startup_ts = srv->cur_ts;
+ return 0;
+}
+
+SETDEFAULTS_FUNC(mod_rrd_set_defaults) {
+ plugin_data *p = p_d;
+ size_t i;
+ int activate = 0;
+
+ config_values_t cv[] = {
+ { "rrdtool.binary", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 0 */
+ { "rrdtool.db-name", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
+ { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
+ };
+
+ if (!p) return HANDLER_ERROR;
+
+ force_assert(srv->config_context->used > 0);
+ p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
+
+ for (i = 0; i < srv->config_context->used; i++) {
+ data_config const* config = (data_config const*)srv->config_context->data[i];
+ plugin_config *s;
+
+ s = calloc(1, sizeof(plugin_config));
+ s->path_rrdtool_bin = buffer_init();
+ s->path_rrd = buffer_init();
+ s->requests = 0;
+ s->bytes_written = 0;
+ s->bytes_read = 0;
+
+ cv[0].destination = s->path_rrdtool_bin;
+ cv[1].destination = s->path_rrd;
+
+ p->config_storage[i] = s;
+
+ if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
+ return HANDLER_ERROR;
+ }
+
+ if (i > 0 && !buffer_string_is_empty(s->path_rrdtool_bin)) {
+ /* path_rrdtool_bin is a global option */
+
+ log_error_write(srv, __FILE__, __LINE__, "s",
+ "rrdtool.binary can only be set as a global option.");
+
+ return HANDLER_ERROR;
+ }
+
+ if (!buffer_string_is_empty(s->path_rrd)) activate = 1;
+ }
+
+ p->conf.path_rrdtool_bin = p->config_storage[0]->path_rrdtool_bin;
+ p->rrdtool_running = 0;
+ p->read_fd = -1;
+ p->write_fd = -1;
+
+ if (!activate) return HANDLER_GO_ON;
+
+ /* check for dir */
+
+ if (buffer_string_is_empty(p->conf.path_rrdtool_bin)) {
+ log_error_write(srv, __FILE__, __LINE__, "s",
+ "rrdtool.binary has to be set");
+ return HANDLER_ERROR;
+ }
+
+ return 0 == mod_rrd_exec(srv, p) ? HANDLER_GO_ON : HANDLER_ERROR;
+}
+
+static void mod_rrd_fatal_error(server *srv, plugin_data *p) {
+ /* future: might send kill() signal to p->rrdtool_pid to trigger restart */
+ p->rrdtool_running = 0;
+ UNUSED(srv);
+}
+
+TRIGGER_FUNC(mod_rrd_trigger) {
+ plugin_data *p = p_d;
+ size_t i;
+
+ if (!p->rrdtool_running) {
+ /* limit restart to once every 5 sec */
+ /*(0 == p->rrdtool_pid if never activated; not used)*/
+ if (-1 == p->rrdtool_pid
+ && p->srv_pid == srv->pid
+ && p->rrdtool_startup_ts + 5 < srv->cur_ts) {
+ mod_rrd_exec(srv, p);
+ }
+ return HANDLER_GO_ON;
+ }
+
+ if ((srv->cur_ts % 60) != 0) return HANDLER_GO_ON;
+
+ for (i = 0; i < srv->config_context->used; i++) {
+ plugin_config *s = p->config_storage[i];
+
+ if (buffer_string_is_empty(s->path_rrd)) continue;
+
+ /* write the data down every minute */
+
+ if (HANDLER_GO_ON != mod_rrdtool_create_rrd(srv, p, s)) return HANDLER_GO_ON;
+
+ buffer_copy_string_len(p->cmd, CONST_STR_LEN("update "));
+ buffer_append_string_buffer(p->cmd, s->path_rrd);
+ buffer_append_string_len(p->cmd, CONST_STR_LEN(" N:"));
+ buffer_append_int(p->cmd, s->bytes_read);
+ buffer_append_string_len(p->cmd, CONST_STR_LEN(":"));
+ buffer_append_int(p->cmd, s->bytes_written);
+ buffer_append_string_len(p->cmd, CONST_STR_LEN(":"));
+ buffer_append_int(p->cmd, s->requests);
+ buffer_append_string_len(p->cmd, CONST_STR_LEN("\n"));
+
+ if (-1 == safe_write(p->write_fd, CONST_BUF_LEN(p->cmd))) {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "rrdtool-write: failed", strerror(errno));
+
+ mod_rrd_fatal_error(srv, p);
+ return HANDLER_GO_ON;
+ }
+
+ if (-1 == safe_read(p->read_fd, p->resp)) {
+ log_error_write(srv, __FILE__, __LINE__, "ss",
+ "rrdtool-read: failed", strerror(errno));
+
+ mod_rrd_fatal_error(srv, p);
+ return HANDLER_GO_ON;
+ }
+
+ if (p->resp->ptr[0] != 'O' ||
+ p->resp->ptr[1] != 'K') {
+ /* don't fail on this error if we just started (graceful restart, the old one might have just updated too) */
+ if (!(strstr(p->resp->ptr, "(minimum one second step)") && (srv->cur_ts - srv->startup_ts < 3))) {
+ log_error_write(srv, __FILE__, __LINE__, "sbb",
+ "rrdtool-response:", p->cmd, p->resp);
+
+ mod_rrd_fatal_error(srv, p);
+ return HANDLER_GO_ON;
+ }
+ }
+ s->requests = 0;
+ s->bytes_written = 0;
+ s->bytes_read = 0;
+ }
+
+ return HANDLER_GO_ON;
+}
+
+static handler_t mod_rrd_waitpid_cb(server *srv, void *p_d, pid_t pid, int status) {
+ plugin_data *p = p_d;
+ if (pid != p->rrdtool_pid) return HANDLER_GO_ON;
+ if (srv->pid != p->srv_pid) return HANDLER_GO_ON;
+
+ p->rrdtool_running = 0;
+ p->rrdtool_pid = -1;
+
+ /* limit restart to once every 5 sec */
+ if (p->rrdtool_startup_ts + 5 < srv->cur_ts)
+ mod_rrd_exec(srv, p);
+
+ UNUSED(status);
+ return HANDLER_FINISHED;
+}
+
+REQUESTDONE_FUNC(mod_rrd_account) {
+ plugin_data *p = p_d;
+
+ /*(0 == p->rrdtool_pid if never activated; not used)*/
+ if (0 == p->rrdtool_pid) return HANDLER_GO_ON;
+ mod_rrd_patch_connection(srv, con, p);
+
+ *(p->conf.requests_ptr) += 1;
+ *(p->conf.bytes_written_ptr) += con->bytes_written;
+ *(p->conf.bytes_read_ptr) += con->bytes_read;
+
+ return HANDLER_GO_ON;
+}
+
+int mod_rrdtool_plugin_init(plugin *p);
+int mod_rrdtool_plugin_init(plugin *p) {
+ p->version = LIGHTTPD_VERSION_ID;
+ p->name = buffer_init_string("rrd");
+
+ p->init = mod_rrd_init;
+ p->cleanup = mod_rrd_free;
+ p->set_defaults= mod_rrd_set_defaults;
+
+ p->handle_trigger = mod_rrd_trigger;
+ p->handle_waitpid = mod_rrd_waitpid_cb;
+ p->handle_request_done = mod_rrd_account;
+
+ p->data = NULL;
+
+ return 0;
+}
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