void fpm_request_end(void) /* {{{ */
{
struct fpm_scoreboard_proc_s *proc;
struct timeval now;
#ifdef HAVE_TIMES
struct tms cpu;
#endif
size_t memory = zend_memory_peak_usage(1);
fpm_clock_get(&now);
#ifdef HAVE_TIMES
times(&cpu);
#endif
proc = fpm_scoreboard_proc_acquire(NULL, -1, 0);
if (proc == NULL) {
zlog(ZLOG_WARNING, "failed to acquire proc scoreboard");
return;
}
proc->request_stage = FPM_REQUEST_FINISHED;
proc->tv = now;
timersub(&now, &proc->accepted, &proc->duration);
#ifdef HAVE_TIMES
timersub(&proc->tv, &proc->accepted, &proc->cpu_duration);
proc->last_request_cpu.tms_utime = cpu.tms_utime - proc->cpu_accepted.tms_utime;
proc->last_request_cpu.tms_stime = cpu.tms_stime - proc->cpu_accepted.tms_stime;
proc->last_request_cpu.tms_cutime = cpu.tms_cutime - proc->cpu_accepted.tms_cutime;
proc->last_request_cpu.tms_cstime = cpu.tms_cstime - proc->cpu_accepted.tms_cstime;
#endif
proc->memory = memory;
fpm_scoreboard_proc_release(proc);
}
void fpm_request_info()
{
TSRMLS_FETCH();
struct fpm_shm_slot_s *slot;
char *request_method = fpm_php_request_method(TSRMLS_C);
char *script_filename = fpm_php_script_filename(TSRMLS_C);
slot = fpm_shm_slots_acquire(0, 0);
slot->request_stage = FPM_REQUEST_INFO;
fpm_clock_get(&slot->tv);
if (request_method) {
cpystrn(slot->request_method, request_method, sizeof(slot->request_method));
}
slot->content_length = fpm_php_content_length(TSRMLS_C);
/* if cgi.fix_pathinfo is set to "1" and script cannot be found (404)
the sapi_globals.request_info.path_translated is set to NULL */
if (script_filename) {
cpystrn(slot->script_filename, script_filename, sizeof(slot->script_filename));
}
fpm_shm_slots_release(slot);
}
void fpm_request_executing()
{
struct fpm_shm_slot_s *slot;
slot = fpm_shm_slots_acquire(0, 0);
slot->request_stage = FPM_REQUEST_EXECUTING;
fpm_clock_get(&slot->tv);
fpm_shm_slots_release(slot);
}
void fpm_request_finished()
{
struct fpm_shm_slot_s *slot;
slot = fpm_shm_slots_acquire(0, 0);
slot->request_stage = FPM_REQUEST_FINISHED;
fpm_clock_get(&slot->tv);
memset(&slot->accepted, 0, sizeof(slot->accepted));
fpm_shm_slots_release(slot);
}
void fpm_request_reading_headers()
{
struct fpm_shm_slot_s *slot;
slot = fpm_shm_slots_acquire(0, 0);
slot->request_stage = FPM_REQUEST_READING_HEADERS;
fpm_clock_get(&slot->tv);
slot->accepted = slot->tv;
fpm_shm_slots_release(slot);
}
int fpm_children_make(struct fpm_worker_pool_s *wp, int in_event_loop, int nb_to_spawn, int is_debug) /* {{{ */
{
pid_t pid;
struct fpm_child_s *child;
int max;
if (wp->config->pm == PM_STYLE_DYNAMIC) {
if (!in_event_loop) { /* starting */
max = wp->config->pm_start_servers;
} else {
max = wp->running_children + nb_to_spawn;
}
} else { /* PM_STYLE_STATIC */
max = wp->config->pm_max_children;
}
while (fpm_pctl_can_spawn_children() && wp->running_children < max) {
child = fpm_resources_prepare(wp);
if (!child) {
return 2;
}
pid = fork();
switch (pid) {
case 0 :
fpm_child_resources_use(child);
fpm_globals.is_child = 1;
fpm_child_init(wp);
return 0;
case -1 :
zlog(ZLOG_SYSERROR, "fork() failed");
fpm_resources_discard(child);
return 2;
default :
child->pid = pid;
fpm_clock_get(&child->started);
fpm_parent_resources_use(child);
zlog(is_debug ? ZLOG_DEBUG : ZLOG_NOTICE, "[pool %s] child %d started", wp->config->name, (int) pid);
}
}
return 1; /* we are done */
}
void fpm_request_accepting()
{
struct fpm_shm_slot_s *slot;
slot = fpm_shm_slots_acquire(0, 0);
slot->request_stage = FPM_REQUEST_ACCEPTING;
fpm_clock_get(&slot->tv);
memset(slot->request_method, 0, sizeof(slot->request_method));
slot->content_length = 0;
memset(slot->script_filename, 0, sizeof(slot->script_filename));
fpm_shm_slots_release(slot);
}
void fpm_request_info() /* {{{ */
{
struct fpm_scoreboard_proc_s *proc;
char *request_uri = fpm_php_request_uri();
char *request_method = fpm_php_request_method();
char *script_filename = fpm_php_script_filename();
char *query_string = fpm_php_query_string();
char *auth_user = fpm_php_auth_user();
size_t content_length = fpm_php_content_length();
struct timeval now;
fpm_clock_get(&now);
proc = fpm_scoreboard_proc_acquire(NULL, -1, 0);
if (proc == NULL) {
zlog(ZLOG_WARNING, "failed to acquire proc scoreboard");
return;
}
proc->request_stage = FPM_REQUEST_INFO;
proc->tv = now;
if (request_uri) {
strlcpy(proc->request_uri, request_uri, sizeof(proc->request_uri));
}
if (request_method) {
strlcpy(proc->request_method, request_method, sizeof(proc->request_method));
}
if (query_string) {
strlcpy(proc->query_string, query_string, sizeof(proc->query_string));
}
if (auth_user) {
strlcpy(proc->auth_user, auth_user, sizeof(proc->auth_user));
}
proc->content_length = content_length;
/* if cgi.fix_pathinfo is set to "1" and script cannot be found (404)
the sapi_globals.request_info.path_translated is set to NULL */
if (script_filename) {
strlcpy(proc->script_filename, script_filename, sizeof(proc->script_filename));
}
fpm_scoreboard_proc_release(proc);
}
void fpm_request_finished() /* {{{ */
{
struct fpm_scoreboard_proc_s *proc;
struct timeval now;
fpm_clock_get(&now);
proc = fpm_scoreboard_proc_acquire(NULL, -1, 0);
if (proc == NULL) {
zlog(ZLOG_WARNING, "failed to acquire proc scoreboard");
return;
}
proc->request_stage = FPM_REQUEST_FINISHED;
proc->tv = now;
fpm_scoreboard_proc_release(proc);
}
void fpm_request_reading_headers() /* {{{ */
{
struct fpm_scoreboard_proc_s *proc;
struct timeval now;
clock_t now_epoch;
#ifdef HAVE_TIMES
struct tms cpu;
#endif
fpm_clock_get(&now);
now_epoch = time(NULL);
#ifdef HAVE_TIMES
times(&cpu);
#endif
proc = fpm_scoreboard_proc_acquire(NULL, -1, 0);
if (proc == NULL) {
zlog(ZLOG_WARNING, "failed to acquire proc scoreboard");
return;
}
proc->request_stage = FPM_REQUEST_READING_HEADERS;
proc->tv = now;
proc->accepted = now;
proc->accepted_epoch = now_epoch;
#ifdef HAVE_TIMES
proc->cpu_accepted = cpu;
#endif
proc->requests++;
proc->request_uri[0] = '\0';
proc->request_method[0] = '\0';
proc->script_filename[0] = '\0';
proc->query_string[0] = '\0';
proc->query_string[0] = '\0';
proc->auth_user[0] = '\0';
proc->content_length = 0;
fpm_scoreboard_proc_release(proc);
/* idle--, active++, request++ */
fpm_scoreboard_update(-1, 1, 0, 0, 1, 0, 0, FPM_SCOREBOARD_ACTION_INC, NULL);
}
void fpm_request_accepting() /* {{{ */
{
struct fpm_scoreboard_proc_s *proc;
struct timeval now;
fpm_clock_get(&now);
proc = fpm_scoreboard_proc_acquire(NULL, -1, 0);
if (proc == NULL) {
zlog(ZLOG_WARNING, "failed to acquire proc scoreboard");
return;
}
proc->request_stage = FPM_REQUEST_ACCEPTING;
proc->tv = now;
fpm_scoreboard_proc_release(proc);
/* idle++, active-- */
fpm_scoreboard_update(1, -1, 0, 0, 0, 0, 0, FPM_SCOREBOARD_ACTION_INC, NULL);
}
void fpm_status_update_activity(struct fpm_shm_s *shm, int idle, int active, int total, unsigned cur_lq, int max_lq, int clear_last_update) /* {{{ */
{
struct fpm_status_s status;
if (!shm) shm = fpm_status_shm;
if (!shm || !shm->mem) return;
/* one shot operation */
status = *(struct fpm_status_s *)shm->mem;
status.idle = idle;
status.active = active;
status.total = total;
status.cur_lq = cur_lq;
status.max_lq = max_lq;
if (clear_last_update) {
memset(&status.last_update, 0, sizeof(status.last_update));
} else {
fpm_clock_get(&status.last_update);
}
/* one shot operation */
*(struct fpm_status_s *)shm->mem = status;
}
int fpm_status_handle_request(TSRMLS_D) /* {{{ */
{
struct fpm_scoreboard_s scoreboard, *scoreboard_p;
struct fpm_scoreboard_proc_s proc;
char *buffer, *time_format, time_buffer[64];
time_t now_epoch;
int full, encode;
char *short_syntax, *short_post;
char *full_pre, *full_syntax, *full_post, *full_separator;
zend_string *_GET_str;
if (!SG(request_info).request_uri) {
return 0;
}
/* PING */
if (fpm_status_ping_uri && fpm_status_ping_response && !strcmp(fpm_status_ping_uri, SG(request_info).request_uri)) {
fpm_request_executing();
sapi_add_header_ex(ZEND_STRL("Content-Type: text/plain"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Expires: Thu, 01 Jan 1970 00:00:00 GMT"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Cache-Control: no-cache, no-store, must-revalidate, max-age=0"), 1, 1 TSRMLS_CC);
SG(sapi_headers).http_response_code = 200;
/* handle HEAD */
if (SG(request_info).headers_only) {
return 1;
}
PUTS(fpm_status_ping_response);
return 1;
}
/* STATUS */
if (fpm_status_uri && !strcmp(fpm_status_uri, SG(request_info).request_uri)) {
fpm_request_executing();
scoreboard_p = fpm_scoreboard_get();
if (!scoreboard_p) {
zlog(ZLOG_ERROR, "status: unable to find or access status shared memory");
SG(sapi_headers).http_response_code = 500;
sapi_add_header_ex(ZEND_STRL("Content-Type: text/plain"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Expires: Thu, 01 Jan 1970 00:00:00 GMT"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Cache-Control: no-cache, no-store, must-revalidate, max-age=0"), 1, 1 TSRMLS_CC);
PUTS("Internal error. Please review log file for errors.");
return 1;
}
if (!fpm_spinlock(&scoreboard_p->lock, 1)) {
zlog(ZLOG_NOTICE, "[pool %s] status: scoreboard already in used.", scoreboard_p->pool);
SG(sapi_headers).http_response_code = 503;
sapi_add_header_ex(ZEND_STRL("Content-Type: text/plain"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Expires: Thu, 01 Jan 1970 00:00:00 GMT"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Cache-Control: no-cache, no-store, must-revalidate, max-age=0"), 1, 1 TSRMLS_CC);
PUTS("Server busy. Please try again later.");
return 1;
}
/* copy the scoreboard not to bother other processes */
scoreboard = *scoreboard_p;
fpm_unlock(scoreboard_p->lock);
if (scoreboard.idle < 0 || scoreboard.active < 0) {
zlog(ZLOG_ERROR, "[pool %s] invalid status values", scoreboard.pool);
SG(sapi_headers).http_response_code = 500;
sapi_add_header_ex(ZEND_STRL("Content-Type: text/plain"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Expires: Thu, 01 Jan 1970 00:00:00 GMT"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Cache-Control: no-cache, no-store, must-revalidate, max-age=0"), 1, 1 TSRMLS_CC);
PUTS("Internal error. Please review log file for errors.");
return 1;
}
/* send common headers */
sapi_add_header_ex(ZEND_STRL("Expires: Thu, 01 Jan 1970 00:00:00 GMT"), 1, 1 TSRMLS_CC);
sapi_add_header_ex(ZEND_STRL("Cache-Control: no-cache, no-store, must-revalidate, max-age=0"), 1, 1 TSRMLS_CC);
SG(sapi_headers).http_response_code = 200;
/* handle HEAD */
if (SG(request_info).headers_only) {
return 1;
}
/* full status ? */
_GET_str = STR_INIT("_GET", sizeof("_GET")-1, 0);
full = (fpm_php_get_string_from_table(_GET_str, "full" TSRMLS_CC) != NULL);
short_syntax = short_post = NULL;
full_separator = full_pre = full_syntax = full_post = NULL;
encode = 0;
/* HTML */
if (fpm_php_get_string_from_table(_GET_str, "html" TSRMLS_CC)) {
sapi_add_header_ex(ZEND_STRL("Content-Type: text/html"), 1, 1 TSRMLS_CC);
time_format = "%d/%b/%Y:%H:%M:%S %z";
encode = 1;
short_syntax =
"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">\n"
"<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" lang=\"en\">\n"
"<head><title>PHP-FPM Status Page</title></head>\n"
"<body>\n"
"<table>\n"
"<tr><th>pool</th><td>%s</td></tr>\n"
"<tr><th>process manager</th><td>%s</td></tr>\n"
"<tr><th>start time</th><td>%s</td></tr>\n"
"<tr><th>start since</th><td>%lu</td></tr>\n"
"<tr><th>accepted conn</th><td>%lu</td></tr>\n"
#ifdef HAVE_FPM_LQ
"<tr><th>listen queue</th><td>%u</td></tr>\n"
"<tr><th>max listen queue</th><td>%u</td></tr>\n"
"<tr><th>listen queue len</th><td>%d</td></tr>\n"
#endif
"<tr><th>idle processes</th><td>%d</td></tr>\n"
"<tr><th>active processes</th><td>%d</td></tr>\n"
"<tr><th>total processes</th><td>%d</td></tr>\n"
"<tr><th>max active processes</th><td>%d</td></tr>\n"
"<tr><th>max children reached</th><td>%u</td></tr>\n"
"<tr><th>slow requests</th><td>%lu</td></tr>\n"
"</table>\n";
if (!full) {
short_post = "</body></html>";
} else {
full_pre =
"<table border=\"1\">\n"
"<tr>"
"<th>pid</th>"
"<th>state</th>"
"<th>start time</th>"
"<th>start since</th>"
"<th>requests</th>"
"<th>request duration</th>"
"<th>request method</th>"
"<th>request uri</th>"
"<th>content length</th>"
"<th>user</th>"
"<th>script</th>"
#ifdef HAVE_FPM_LQ
"<th>last request cpu</th>"
#endif
"<th>last request memory</th>"
"</tr>\n";
full_syntax =
"<tr>"
"<td>%d</td>"
"<td>%s</td>"
"<td>%s</td>"
"<td>%lu</td>"
"<td>%lu</td>"
"<td>%lu</td>"
"<td>%s</td>"
"<td>%s%s%s</td>"
"<td>%zu</td>"
"<td>%s</td>"
"<td>%s</td>"
#ifdef HAVE_FPM_LQ
"<td>%.2f</td>"
#endif
"<td>%zu</td>"
"</tr>\n";
full_post = "</table></body></html>";
}
/* XML */
} else if (fpm_php_get_string_from_table(_GET_str, "xml" TSRMLS_CC)) {
sapi_add_header_ex(ZEND_STRL("Content-Type: text/xml"), 1, 1 TSRMLS_CC);
time_format = "%s";
encode = 1;
short_syntax =
"<?xml version=\"1.0\" ?>\n"
"<status>\n"
"<pool>%s</pool>\n"
"<process-manager>%s</process-manager>\n"
"<start-time>%s</start-time>\n"
"<start-since>%lu</start-since>\n"
"<accepted-conn>%lu</accepted-conn>\n"
#ifdef HAVE_FPM_LQ
"<listen-queue>%u</listen-queue>\n"
"<max-listen-queue>%u</max-listen-queue>\n"
"<listen-queue-len>%d</listen-queue-len>\n"
#endif
"<idle-processes>%d</idle-processes>\n"
"<active-processes>%d</active-processes>\n"
"<total-processes>%d</total-processes>\n"
"<max-active-processes>%d</max-active-processes>\n"
"<max-children-reached>%u</max-children-reached>\n"
"<slow-requests>%lu</slow-requests>\n";
if (!full) {
short_post = "</status>";
} else {
full_pre = "<processes>\n";
full_syntax =
"<process>"
"<pid>%d</pid>"
"<state>%s</state>"
"<start-time>%s</start-time>"
"<start-since>%lu</start-since>"
"<requests>%lu</requests>"
"<request-duration>%lu</request-duration>"
"<request-method>%s</request-method>"
"<request-uri>%s%s%s</request-uri>"
"<content-length>%zu</content-length>"
"<user>%s</user>"
"<script>%s</script>"
#ifdef HAVE_FPM_LQ
"<last-request-cpu>%.2f</last-request-cpu>"
#endif
"<last-request-memory>%zu</last-request-memory>"
"</process>\n"
;
full_post = "</processes>\n</status>";
}
/* JSON */
} else if (fpm_php_get_string_from_table(_GET_str, "json" TSRMLS_CC)) {
sapi_add_header_ex(ZEND_STRL("Content-Type: application/json"), 1, 1 TSRMLS_CC);
time_format = "%s";
short_syntax =
"{"
"\"pool\":\"%s\","
"\"process manager\":\"%s\","
"\"start time\":%s,"
"\"start since\":%lu,"
"\"accepted conn\":%lu,"
#ifdef HAVE_FPM_LQ
"\"listen queue\":%u,"
"\"max listen queue\":%u,"
"\"listen queue len\":%d,"
#endif
"\"idle processes\":%d,"
"\"active processes\":%d,"
"\"total processes\":%d,"
"\"max active processes\":%d,"
"\"max children reached\":%u,"
"\"slow requests\":%lu";
if (!full) {
short_post = "}";
} else {
full_separator = ",";
full_pre = ", \"processes\":[";
full_syntax = "{"
"\"pid\":%d,"
"\"state\":\"%s\","
"\"start time\":%s,"
"\"start since\":%lu,"
"\"requests\":%lu,"
"\"request duration\":%lu,"
"\"request method\":\"%s\","
"\"request uri\":\"%s%s%s\","
"\"content length\":%zu,"
"\"user\":\"%s\","
"\"script\":\"%s\","
#ifdef HAVE_FPM_LQ
"\"last request cpu\":%.2f,"
#endif
"\"last request memory\":%zu"
"}";
full_post = "]}";
}
/* TEXT */
} else {
sapi_add_header_ex(ZEND_STRL("Content-Type: text/plain"), 1, 1 TSRMLS_CC);
time_format = "%d/%b/%Y:%H:%M:%S %z";
short_syntax =
"pool: %s\n"
"process manager: %s\n"
"start time: %s\n"
"start since: %lu\n"
"accepted conn: %lu\n"
#ifdef HAVE_FPM_LQ
"listen queue: %u\n"
"max listen queue: %u\n"
"listen queue len: %d\n"
#endif
"idle processes: %d\n"
"active processes: %d\n"
"total processes: %d\n"
"max active processes: %d\n"
"max children reached: %u\n"
"slow requests: %lu\n";
if (full) {
full_syntax =
"\n"
"************************\n"
"pid: %d\n"
"state: %s\n"
"start time: %s\n"
"start since: %lu\n"
"requests: %lu\n"
"request duration: %lu\n"
"request method: %s\n"
"request URI: %s%s%s\n"
"content length: %zu\n"
"user: %s\n"
"script: %s\n"
#ifdef HAVE_FPM_LQ
"last request cpu: %.2f\n"
#endif
"last request memory: %zu\n";
}
}
strftime(time_buffer, sizeof(time_buffer) - 1, time_format, localtime(&scoreboard.start_epoch));
now_epoch = time(NULL);
spprintf(&buffer, 0, short_syntax,
scoreboard.pool,
PM2STR(scoreboard.pm),
time_buffer,
now_epoch - scoreboard.start_epoch,
scoreboard.requests,
#ifdef HAVE_FPM_LQ
scoreboard.lq,
scoreboard.lq_max,
scoreboard.lq_len,
#endif
scoreboard.idle,
scoreboard.active,
scoreboard.idle + scoreboard.active,
scoreboard.active_max,
scoreboard.max_children_reached,
scoreboard.slow_rq);
PUTS(buffer);
efree(buffer);
STR_RELEASE(_GET_str);
if (short_post) {
PUTS(short_post);
}
/* no need to test the var 'full' */
if (full_syntax) {
int i, first;
zend_string *tmp_query_string;
char *query_string;
struct timeval duration, now;
#ifdef HAVE_FPM_LQ
float cpu;
#endif
fpm_clock_get(&now);
if (full_pre) {
PUTS(full_pre);
}
first = 1;
for (i=0; i<scoreboard_p->nprocs; i++) {
if (!scoreboard_p->procs[i] || !scoreboard_p->procs[i]->used) {
continue;
}
proc = *scoreboard_p->procs[i];
if (first) {
first = 0;
} else {
if (full_separator) {
PUTS(full_separator);
}
}
query_string = NULL;
tmp_query_string = NULL;
if (proc.query_string[0] != '\0') {
if (!encode) {
query_string = proc.query_string;
} else {
tmp_query_string = php_escape_html_entities_ex((unsigned char *)proc.query_string, strlen(proc.query_string), 1, ENT_HTML_IGNORE_ERRORS & ENT_COMPAT, NULL, 1 TSRMLS_CC);
query_string = tmp_query_string->val;
}
}
#ifdef HAVE_FPM_LQ
/* prevent NaN */
if (proc.cpu_duration.tv_sec == 0 && proc.cpu_duration.tv_usec == 0) {
cpu = 0.;
} else {
cpu = (proc.last_request_cpu.tms_utime + proc.last_request_cpu.tms_stime + proc.last_request_cpu.tms_cutime + proc.last_request_cpu.tms_cstime) / fpm_scoreboard_get_tick() / (proc.cpu_duration.tv_sec + proc.cpu_duration.tv_usec / 1000000.) * 100.;
}
#endif
if (proc.request_stage == FPM_REQUEST_ACCEPTING) {
duration = proc.duration;
} else {
timersub(&now, &proc.accepted, &duration);
}
strftime(time_buffer, sizeof(time_buffer) - 1, time_format, localtime(&proc.start_epoch));
spprintf(&buffer, 0, full_syntax,
proc.pid,
fpm_request_get_stage_name(proc.request_stage),
time_buffer,
now_epoch - proc.start_epoch,
proc.requests,
duration.tv_sec * 1000000UL + duration.tv_usec,
proc.request_method[0] != '\0' ? proc.request_method : "-",
proc.request_uri[0] != '\0' ? proc.request_uri : "-",
query_string ? "?" : "",
query_string ? query_string : "",
proc.content_length,
proc.auth_user[0] != '\0' ? proc.auth_user : "******",
proc.script_filename[0] != '\0' ? proc.script_filename : "-",
#ifdef HAVE_FPM_LQ
proc.request_stage == FPM_REQUEST_ACCEPTING ? cpu : 0.,
#endif
proc.request_stage == FPM_REQUEST_ACCEPTING ? proc.memory : 0);
PUTS(buffer);
efree(buffer);
if (tmp_query_string) {
STR_FREE(tmp_query_string);
}
}
if (full_post) {
PUTS(full_post);
}
}
return 1;
}
return 0;
}
int fpm_children_make(struct fpm_worker_pool_s *wp, int in_event_loop, int nb_to_spawn, int is_debug) /* {{{ */
{
pid_t pid;
struct fpm_child_s *child;
int max;
static int warned = 0;
//动态模式
if (wp->config->pm == PM_STYLE_DYNAMIC) {
if (!in_event_loop) { /* starting */
max = wp->config->pm_start_servers;
} else {
max = wp->running_children + nb_to_spawn;
}
} else if (wp->config->pm == PM_STYLE_ONDEMAND) {
//ondemand模式
if (!in_event_loop) { /* starting */
max = 0; /* do not create any child at startup */
} else {
max = wp->running_children + nb_to_spawn;
}
} else { /* PM_STYLE_STATIC */
//静态模式
max = wp->config->pm_max_children;
}
/*
* fork children while:
* - fpm_pctl_can_spawn_children : FPM is running in a NORMAL state (aka not restart, stop or reload)
* - wp->running_children < max : there is less than the max process for the current pool
* - (fpm_global_config.process_max < 1 || fpm_globals.running_children < fpm_global_config.process_max):
* if fpm_global_config.process_max is set, FPM has not fork this number of processes (globaly)
*/
//当执行restart、stop、reload命令时，fpm_pctl_can_spawn_children()为false
while (fpm_pctl_can_spawn_children() && wp->running_children < max && (fpm_global_config.process_max < 1 || fpm_globals.running_children < fpm_global_config.process_max)) {
warned = 0;
child = fpm_resources_prepare(wp);
if (!child) {
return 2;
}
//fork子进程
pid = fork();
switch (pid) {
case 0 :
fpm_child_resources_use(child);
fpm_globals.is_child = 1;
//子进程初始化
fpm_child_init(wp);
return 0;
case -1 :
zlog(ZLOG_SYSERROR, "fork() failed");
fpm_resources_discard(child);
return 2;
default :
child->pid = pid;
fpm_clock_get(&child->started);
fpm_parent_resources_use(child);
zlog(is_debug ? ZLOG_DEBUG : ZLOG_NOTICE, "[pool %s] child %d started", wp->config->name, (int) pid);
}
}
if (!warned && fpm_global_config.process_max > 0 && fpm_globals.running_children >= fpm_global_config.process_max) {
warned = 1;
zlog(ZLOG_WARNING, "The maximum number of processes has been reached. Please review your configuration and consider raising 'process.max'");
}
return 1; /* we are done */
}
void fpm_children_bury() /* {{{ */
{
int status;
pid_t pid;
struct fpm_child_s *child;
while ( (pid = waitpid(-1, &status, WNOHANG | WUNTRACED)) > 0) {
char buf[128];
int severity = ZLOG_NOTICE;
int restart_child = 1;
child = fpm_child_find(pid);
/*
WIFEXITED(status)如果子进程正常结束则为非0值。
WEXITSTATUS(status)取得子进程exit()返回的结束代码，一般会先用WIFEXITED 来判断是否正常结束才能使用此宏。
WIFSIGNALED(status)如果子进程是因为信号而结束则此宏值为真
WTERMSIG(status)取得子进程因信号而中止的信号代码，一般会先用WIFSIGNALED 来判断后才使用此宏。
WIFSTOPPED(status)如果子进程处于暂停执行情况则此宏值为真。一般只有使用WUNTRACED 时才会有此情况。
WSTOPSIG(status)取得引发子进程暂停的信号代码，
*/
if (WIFEXITED(status)) {
snprintf(buf, sizeof(buf), "with code %d", WEXITSTATUS(status));
/* if it's been killed because of dynamic process management
* don't restart it automaticaly
*/
if (child && child->idle_kill) {
restart_child = 0;
}
if (WEXITSTATUS(status) != FPM_EXIT_OK) {
severity = ZLOG_WARNING;
}
} else if (WIFSIGNALED(status)) {
const char *signame = fpm_signal_names[WTERMSIG(status)];
const char *have_core = WCOREDUMP(status) ? " - core dumped" : "";
if (signame == NULL) {
signame = "";
}
snprintf(buf, sizeof(buf), "on signal %d (%s%s)", WTERMSIG(status), signame, have_core);
/* if it's been killed because of dynamic process management
* don't restart it automaticaly
*/
if (child && child->idle_kill && WTERMSIG(status) == SIGQUIT) {
restart_child = 0;
}
if (WTERMSIG(status) != SIGQUIT) { /* possible request loss */
severity = ZLOG_WARNING;
}
} else if (WIFSTOPPED(status)) {
zlog(ZLOG_NOTICE, "child %d stopped for tracing", (int) pid);
//回调 php_trace.c
if (child && child->tracer) {
child->tracer(child);
}
continue;
}
if (child) {
struct fpm_worker_pool_s *wp = child->wp;
struct timeval tv1, tv2;
fpm_child_unlink(child);
//释放scoreboard
fpm_scoreboard_proc_free(wp->scoreboard, child->scoreboard_i);
fpm_clock_get(&tv1);
timersub(&tv1, &child->started, &tv2);
if (restart_child) {
if (!fpm_pctl_can_spawn_children()) {
severity = ZLOG_DEBUG;
}
zlog(severity, "[pool %s] child %d exited %s after %ld.%06d seconds from start", child->wp->config->name, (int) pid, buf, tv2.tv_sec, (int) tv2.tv_usec);
} else {
zlog(ZLOG_DEBUG, "[pool %s] child %d has been killed by the process managment after %ld.%06d seconds from start", child->wp->config->name, (int) pid, tv2.tv_sec, (int) tv2.tv_usec);
}
fpm_child_close(child, 1 /* in event_loop */);
fpm_pctl_child_exited();
if (last_faults && (WTERMSIG(status) == SIGSEGV || WTERMSIG(status) == SIGBUS)) {
time_t now = tv1.tv_sec;
int restart_condition = 1;
int i;
last_faults[fault++] = now;
if (fault == fpm_global_config.emergency_restart_threshold) {
fault = 0;
}
for (i = 0; i < fpm_global_config.emergency_restart_threshold; i++) {
if (now - last_faults[i] > fpm_global_config.emergency_restart_interval) {
restart_condition = 0;
break;
}
}
if (restart_condition) {
zlog(ZLOG_WARNING, "failed processes threshold (%d in %d sec) is reached, initiating reload", fpm_global_config.emergency_restart_threshold, fpm_global_config.emergency_restart_interval);
fpm_pctl(FPM_PCTL_STATE_RELOADING, FPM_PCTL_ACTION_SET);
}
}
if (restart_child) {
fpm_children_make(wp, 1 /* in event loop */, 1, 0);
if (fpm_globals.is_child) {
break;
}
}
} else {
zlog(ZLOG_ALERT, "oops, unknown child (%d) exited %s. Please open a bug report (https://bugs.php.net).", pid, buf);
}
}
}
// 初始化fpm_request_info
void fpm_request_info() /* {{{ */
{
TSRMLS_FETCH();
// 记分牌,记录请求的相关信息
struct fpm_scoreboard_proc_s *proc;
//从SG全局变量中拿各种数据
/*
* uri
* method
* filename
* query_string
* 等等
*/
char *request_uri = fpm_php_request_uri(TSRMLS_C);
char *request_method = fpm_php_request_method(TSRMLS_C);
char *script_filename = fpm_php_script_filename(TSRMLS_C);
char *query_string = fpm_php_query_string(TSRMLS_C);
char *auth_user = fpm_php_auth_user(TSRMLS_C);
size_t content_length = fpm_php_content_length(TSRMLS_C);
struct timeval now;
fpm_clock_get(&now);
// 拿到进程,加锁
proc = fpm_scoreboard_proc_acquire(NULL, -1, 0);
if (proc == NULL) {
zlog(ZLOG_WARNING, "failed to acquire proc scoreboard");
return;
}
proc->request_stage = FPM_REQUEST_INFO;
proc->tv = now;
if (request_uri) {
strlcpy(proc->request_uri, request_uri, sizeof(proc->request_uri));
}
if (request_method) { // post, get, delete, or...
strlcpy(proc->request_method, request_method, sizeof(proc->request_method));
}
if (query_string) {
strlcpy(proc->query_string, query_string, sizeof(proc->query_string));
}
if (auth_user) {
strlcpy(proc->auth_user, auth_user, sizeof(proc->auth_user));
}
proc->content_length = content_length;
/* if cgi.fix_pathinfo is set to "1" and script cannot be found (404)
the sapi_globals.request_info.path_translated is set to NULL */
if (script_filename) {
strlcpy(proc->script_filename, script_filename, sizeof(proc->script_filename));
}
// 释放锁
fpm_scoreboard_proc_release(proc);
}