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boinc/client/scheduler_op.C

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// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#ifdef _WIN32
#include "boinc_win.h"
#endif
#ifndef _WIN32
#include <cmath>
#include <cstdlib>
#include <cstdio>
#include <ctime>
#endif
#include "util.h"
#include "parse.h"
#include "error_numbers.h"
#include "client_state.h"
#include "client_types.h"
#include "client_msgs.h"
#include "file_names.h"
#include "log_flags.h"
#include "scheduler_op.h"
using std::vector;
extern void project_add_failed(PROJECT*);
SCHEDULER_OP::SCHEDULER_OP(HTTP_OP_SET* h) {
state = SCHEDULER_OP_STATE_IDLE;
http_op.http_op_state = HTTP_STATE_IDLE;
http_ops = h;
}
// see if there's a pending master file fetch. start it if so.
//
bool SCHEDULER_OP::check_master_fetch_start() {
int retval;
project = gstate.next_project_master_pending();
if (project) {
retval = init_master_fetch(project);
if (retval) {
msg_printf(project, MSG_ERROR,
"Couldn't read master page for %s: error %d",
project->get_project_name(), retval
);
if (project->tentative) {
msg_printf(project, MSG_ERROR, "Detaching from project - check for URL error");
project_add_failed(project);
} else {
project->master_fetch_failures++;
backoff(project, "Master file fetch failed\n");
}
}
return true;
}
return false;
}
// try to get work, from any project from which we need it
// PRECONDITION: compute_work_requests() has been called
// to fill in PROJECT::work_request
//
int SCHEDULER_OP::init_get_work() {
int retval;
char err_msg[256];
double ns;
must_get_work = true;
project = gstate.next_project_need_work(0);
if (project) {
ns = project->work_request;
msg_printf(project, MSG_INFO, "Requesting %.2f seconds of work", ns);
retval = init_op_project(ns);
if (retval) {
sprintf(err_msg, "init_op_project failed, error %d\n", retval);
backoff(project, err_msg);
return retval;
}
} else {
check_master_fetch_start();
}
return 0;
}
// report results for a particular project.
// PRECONDITION: compute_work_requests() has been called
// to fill in PROJECT::work_request
//
int SCHEDULER_OP::init_return_results(PROJECT* p) {
must_get_work = false;
project = p;
return init_op_project(p->work_request);
}
// try to initiate an RPC to the current project.
// If there are multiple schedulers, start with the first one
//
int SCHEDULER_OP::init_op_project(double ns) {
int retval;
char err_msg[256];
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
scope_messages.printf("SCHEDULER_OP::init_op_project(): starting op for %s\n", project->master_url);
// if project has no schedulers, skip everything else
// and just get its master file.
//
url_index = 0;
if (project->scheduler_urls.size() == 0) {
retval = init_master_fetch(project);
goto done;
}
retval = gstate.make_scheduler_request(project, ns);
if (retval) {
msg_printf(project, MSG_ERROR, "make_scheduler_request: %d\n", retval);
goto done;
}
retval = start_rpc();
done:
if (retval) {
sprintf(err_msg,
"scheduler init_op_project to %s failed, error %d\n",
project->scheduler_urls[url_index].text, retval
);
backoff(project, err_msg);
}
return retval;
}
// Set a project's min RPC time to something in the future,
// based on exponential backoff
//
int SCHEDULER_OP::set_min_rpc_time(PROJECT* p) {
double exp_backoff;
int n = p->nrpc_failures;
if (n > gstate.retry_cap) n = gstate.retry_cap;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
// we've hit the limit on master_url fetches
//
if (p->master_fetch_failures >= gstate.master_fetch_retry_cap) {
scope_messages.printf("SCHEDULER_OP::set_min_rpc_time(): we've hit the limit on master_url fetches\n");
exp_backoff = calculate_exponential_backoff("scheduler_op/master_url",
p->master_fetch_failures, gstate.sched_retry_delay_min,
gstate.master_fetch_interval
);
} else {
exp_backoff = calculate_exponential_backoff("scheduler_op",
n, gstate.sched_retry_delay_min, gstate.sched_retry_delay_max,
gstate.retry_base_period
);
}
p->set_min_rpc_time(dtime() + exp_backoff);
// note: we don't need to print a message now, it will be printed the
// next time p->waiting_until_min_rpc_time() is called.
return 0;
}
// One of the following errors occurred:
// - connection failure in fetching master file
// - connection failure in scheduler RPC
// - got master file, but it didn't have any <scheduler> elements
// - tried all schedulers, none responded
// - sent nonzero work request, got a reply with no work
//
// Back off contacting this project's schedulers,
// and output an error msg if needed
//
void SCHEDULER_OP::backoff(PROJECT* p, const char *error_msg ) {
msg_printf(p, MSG_ERROR, error_msg);
if (p->master_fetch_failures >= gstate.master_fetch_retry_cap) {
p->master_url_fetch_pending = true;
} else {
// if nrpc failures is a multiple of master_fetch_period,
// then set master_url_fetch_pending and initialize again
//
if (p->nrpc_failures == gstate.master_fetch_period) {
p->master_url_fetch_pending = true;
p->min_rpc_time = 0;
p->nrpc_failures = 0;
p->master_fetch_failures++;
}
p->nrpc_failures++;
}
set_min_rpc_time(p);
}
// low-level routine to initiate an RPC
// If successful, creates an HTTP_OP that must be polled
// PRECONDITION: the request file has been created
//
int SCHEDULER_OP::start_rpc() {
int retval;
char request_file[1024], reply_file[1024];
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
safe_strcpy(scheduler_url, project->scheduler_urls[url_index].text);
if (log_flags.sched_ops) {
msg_printf(
project, MSG_INFO,
"Sending request to scheduler: %s\n", scheduler_url
);
}
get_sched_request_filename(*project, request_file);
get_sched_reply_filename(*project, reply_file);
scope_messages.printf_file(request_file, "req:");
http_op.set_proxy(&gstate.proxy_info);
retval = http_op.init_post(
scheduler_url, request_file, reply_file
);
if (retval) return retval;
retval = http_ops->insert(&http_op);
if (retval) return retval;
project->rpc_seqno++;
state = SCHEDULER_OP_STATE_RPC;
return 0;
}
// initiate a fetch of a project's master URL file
//
int SCHEDULER_OP::init_master_fetch(PROJECT* p) {
int retval;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
project = p;
scope_messages.printf("SCHEDULER_OP::init_master_fetch(): Fetching master file for %s\n", project->master_url);
http_op.set_proxy(&gstate.proxy_info);
retval = http_op.init_get(project->master_url, MASTER_FILE_NAME, true);
if (retval) return retval;
retval = http_ops->insert(&http_op);
if (retval) return retval;
state = SCHEDULER_OP_STATE_GET_MASTER;
return 0;
}
static void trim(STRING256& str) {
char* last_char = str.text + strlen(str.text);
while (isspace(*(last_char-1)) && last_char > str.text) {
--last_char;
}
*last_char = '\0';
char *first_char = str.text;
if (isspace(*first_char)) {
while (isspace(*first_char)) {
++first_char;
}
char* dest = str.text;
while (*first_char) {
*dest++ = *first_char++;
}
*dest = '\0';
}
}
// parse a master file.
//
int SCHEDULER_OP::parse_master_file(vector<STRING256> &urls) {
char buf[256];
STRING256 str;
FILE* f;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
f = fopen(MASTER_FILE_NAME, "r");
if (!f) {
msg_printf(project, MSG_ERROR, "Can't open master file\n");
return ERR_FOPEN;
}
project->scheduler_urls.clear();
while (fgets(buf, 256, f)) {
if (parse_str(buf, "<scheduler>", str.text, sizeof(str.text))) {
trim(str);
urls.push_back(str);
}
}
fclose(f);
scope_messages.printf("SCHEDULER_OP::parse_master_file(): got %d scheduler URLs\n", (int)urls.size());
// couldn't find any urls in the master file?
//
if ((int) urls.size() == 0) {
return ERR_XML_PARSE;
}
return 0;
}
// A master file has just been read.
// transfer scheduler urls to project.
// Return true if any of them is new
//
bool SCHEDULER_OP::update_urls(vector<STRING256> &urls) {
unsigned int i, j;
bool found, any_new;
any_new = false;
for (i=0; i<urls.size(); i++) {
found = false;
for (j=0; j<project->scheduler_urls.size(); j++) {
if (!strcmp(urls[i].text, project->scheduler_urls[i].text)) {
found = true;
break;
}
}
if (!found) any_new = true;
}
project->scheduler_urls.clear();
for (i=0; i<urls.size(); i++) {
project->scheduler_urls.push_back(urls[i]);
}
return any_new;
}
// poll routine. If an operation is in progress, check for completion
//
bool SCHEDULER_OP::poll() {
int retval, nresults;
vector<STRING256> urls;
bool changed, scheduler_op_done;
bool action = false, err = false;
char err_msg[256], *err_url=NULL;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
switch(state) {
case SCHEDULER_OP_STATE_GET_MASTER:
// here we're fetching the master file for a project
//
if (http_op.http_op_state == HTTP_STATE_DONE) {
action = true;
project->master_url_fetch_pending = false;
gstate.set_client_state_dirty("master URL fetch done");
http_ops->remove(&http_op);
if (http_op.http_op_retval == 0) {
scope_messages.printf(
"SCHEDULER_OP::poll(): Got master file from %s; parsing\n",
project->master_url
);
retval = parse_master_file(urls);
if (retval) {
// master file parse failed.
//
if (project->tentative) {
PROJECT* project_temp = project;
project = 0; // keep detach(0) from removing HTTP OP
state = SCHEDULER_OP_STATE_IDLE; // avoid double remove
project_add_failed(project_temp);
err = true;
} else {
project->master_fetch_failures++;
backoff(project, "Master file parse failed\n");
err_url = project->master_url;
}
} else {
// everything succeeded. Clear error counters
//
changed = update_urls(urls);
if (changed) {
project->min_rpc_time = 0;
project->nrpc_failures = 0;
project->master_fetch_failures = 0;
}
}
} else {
// master file fetch failed.
//
project->master_fetch_failures++;
backoff(project, "Master file fetch failed\n");
err_url = project->master_url;
}
// Done with master file fetch.
// If tentative project and don't have any schedulers,
// it may be the wrong URL. notify the user
//
if (!err && project->scheduler_urls.size() == 0) {
if (project->tentative) {
state = SCHEDULER_OP_STATE_IDLE; // avoid double remove
project_add_failed(project);
} else {
sprintf(err_msg,
"Could not contact any schedulers for %s.",
err_url
);
msg_printf(project, MSG_ERROR, err_msg);
project->master_fetch_failures++;
backoff(project, err_msg);
}
}
// See if need to read master file for another project;
// if not, we're done for now
//
if (!check_master_fetch_start()) {
state = SCHEDULER_OP_STATE_IDLE;
scope_messages.printf("SCHEDULER_OP::poll(): return to idle state\n");
}
}
break;
case SCHEDULER_OP_STATE_RPC:
// here we're doing a scheduler RPC
//
scheduler_op_done = false;
if (http_op.http_op_state == HTTP_STATE_DONE) {
action = true;
http_ops->remove(&http_op);
if (http_op.http_op_retval) {
if (log_flags.sched_ops) {
msg_printf(project, MSG_ERROR,
"Scheduler RPC to %s failed\n",
project->scheduler_urls[url_index].text
);
}
// scheduler RPC failed. Try another scheduler if one exists
//
url_index++;
if (url_index < project->scheduler_urls.size()) {
start_rpc();
} else {
backoff(project, "No schedulers responded");
if (must_get_work) {
int urgency = gstate.compute_work_requests();
project = gstate.next_project_need_work(project);
if (project && urgency != DONT_NEED_WORK) {
retval = init_op_project(project->work_request);
} else {
scheduler_op_done = true;
}
} else {
scheduler_op_done = true;
}
}
} else {
if (log_flags.sched_ops) {
msg_printf(
project, MSG_INFO,
"Scheduler RPC to %s succeeded\n",
project->scheduler_urls[url_index].text
);
}
retval = gstate.handle_scheduler_reply(project, scheduler_url, nresults);
// if this was a tentative project and we didn't get user name,
// the account ID must be bad. Tell the user.
//
if (project->tentative) {
if (retval || strlen(project->user_name)==0) {
state = SCHEDULER_OP_STATE_IDLE; // avoid double remove
project_add_failed(project);
} else {
project->tentative = false;
retval = project->write_account_file();
if (retval) {
project_add_failed(project);
}
#if 0
gstate.calc_all_proj_size();
#endif
}
} else {
switch (retval) {
case 0:
// if we asked for work and didn't get any,
// back off this project
//
if (must_get_work && nresults==0) {
backoff(project, "No work from project\n");
} else {
project->nrpc_failures = 0;
}
break;
case ERR_PROJECT_DOWN:
backoff(project, "Project is down");
break;
default:
backoff(project, "Can't parse scheduler reply");
break;
}
}
// if we didn't get all the work we needed,
// ask another project for work
//
if (must_get_work) {
int urgency = gstate.compute_work_requests();
if (urgency != DONT_NEED_WORK) {
project = gstate.next_project_need_work(project);
if (project) {
retval = init_op_project(project->work_request);
} else {
scheduler_op_done = true;
}
} else {
scheduler_op_done = true;
}
} else {
scheduler_op_done = true;
}
}
}
// If no outstanding ops, see if need a master fetch
//
if (scheduler_op_done) {
project = gstate.next_project_master_pending();
if (project) {
retval = init_master_fetch(project);
if (retval) {
scope_messages.printf("SCHEDULER_OP::poll(): init_master_fetch failed.\n" );
backoff(project, "Scheduler op: init_master_fetch failed.\n" );
}
} else {
state = SCHEDULER_OP_STATE_IDLE;
scope_messages.printf("SCHEDULER_OP::poll(): return to idle state\n");
}
}
break;
default:
break;
}
return action;
}
SCHEDULER_REPLY::SCHEDULER_REPLY() {
global_prefs_xml = 0;
project_prefs_xml = 0;
code_sign_key = 0;
code_sign_key_signature = 0;
}
SCHEDULER_REPLY::~SCHEDULER_REPLY() {
if (global_prefs_xml) free(global_prefs_xml);
if (project_prefs_xml) free(project_prefs_xml);
if (code_sign_key) free(code_sign_key);
if (code_sign_key_signature) free(code_sign_key_signature);
}
// parse a scheduler reply.
// Some of the items go into the SCHEDULER_REPLY object.
// Others are copied straight to the PROJECT
//
int SCHEDULER_REPLY::parse(FILE* in, PROJECT* project) {
char buf[256], msg_buf[1024], pri_buf[256];
int retval, x;
MIOFILE mf;
char delete_file_name[256];
mf.init_file(in);
bool found_start_tag = false;
SCOPE_MSG_LOG scope_messages(log_messages, CLIENT_MSG_LOG::DEBUG_SCHED_OP);
hostid = 0;
request_delay = 0;
global_prefs_xml = 0;
project_prefs_xml = 0;
strcpy(host_venue, "");
code_sign_key = 0;
code_sign_key_signature = 0;
message_ack = false;
project_is_down = false;
send_file_list = false;
messages.clear();
// First line should either be tag (HTTP 1.0) or
// hex length of response (HTTP 1.1)
//
while (fgets(buf, 256, in)) {
if (!found_start_tag) {
if (match_tag(buf, "<scheduler_reply")) {
found_start_tag = true;
}
continue;
}
if (match_tag(buf, "</scheduler_reply>")) {
return 0;
}
else if (parse_str(buf, "<project_name>", project->project_name, sizeof(project->project_name))) continue;
else if (parse_str(buf, "<user_name>", project->user_name, sizeof(project->user_name))) continue;
else if (parse_double(buf, "<user_total_credit>", project->user_total_credit)) continue;
else if (parse_double(buf, "<user_expavg_credit>", project->user_expavg_credit)) continue;
else if (parse_double(buf, "<user_create_time>", project->user_create_time)) continue;
else if (parse_str(buf, "<team_name>", project->team_name, sizeof(project->team_name))) continue;
else if (parse_int(buf, "<hostid>", hostid)) continue;
else if (parse_double(buf, "<host_total_credit>", project->host_total_credit)) continue;
else if (parse_double(buf, "<host_expavg_credit>", project->host_expavg_credit)) continue;
else if (parse_str(buf, "<host_venue>", host_venue, sizeof(host_venue))) continue;
else if (parse_double(buf, "<host_create_time>", project->host_create_time)) continue;
else if (parse_double(buf, "<request_delay>", request_delay)) continue;
else if (match_tag(buf, "<global_preferences>")) {
retval = dup_element_contents(
in,
"</global_preferences>",
&global_prefs_xml
);
if (retval) return ERR_XML_PARSE;
msg_printf(project, MSG_INFO,
"General preferences have been updated\n"
);
} else if (match_tag(buf, "<project_preferences>")) {
retval = dup_element_contents(
in,
"</project_preferences>",
&project_prefs_xml
);
if (retval) return ERR_XML_PARSE;
} else if (match_tag(buf, "<gui_urls>")) {
std::string foo;
retval = copy_element_contents(in, "</gui_urls>", foo);
if (!retval) {
project->gui_urls = "<gui_urls>\n"+foo+"</gui_urls>\n";
}
continue;
#if 0
} else if (match_tag(buf, "<deletion_policy_priority/>")) {
project->deletion_policy_priority = true;
continue;
} else if (match_tag(buf, "<deletion_policy_expire>")) {
project->deletion_policy_expire = true;
continue;
#endif
} else if (match_tag(buf, "<code_sign_key>")) {
retval = dup_element_contents(
in,
"</code_sign_key>",
&code_sign_key
);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse code sign key in scheduler reply: %d",
retval
);
return ERR_XML_PARSE;
}
} else if (match_tag(buf, "<code_sign_key_signature>")) {
retval = dup_element_contents(
in,
"</code_sign_key_signature>",
&code_sign_key_signature
);
if (retval) return ERR_XML_PARSE;
} else if (match_tag(buf, "<app>")) {
APP app;
retval = app.parse(mf);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse app in scheduler reply: %d", retval
);
} else {
apps.push_back(app);
}
} else if (match_tag(buf, "<file_info>")) {
FILE_INFO file_info;
retval = file_info.parse(mf, true);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse file info in scheduler reply: %d", retval
);
} else {
file_infos.push_back(file_info);
}
} else if (match_tag(buf, "<app_version>")) {
APP_VERSION av;
retval = av.parse(mf);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse app version in scheduler reply: %d", retval
);
} else {
app_versions.push_back(av);
}
} else if (match_tag(buf, "<workunit>")) {
WORKUNIT wu;
retval = wu.parse(mf);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse work unit in scheduler reply: %d", retval
);
} else {
workunits.push_back(wu);
}
} else if (match_tag(buf, "<result>")) {
RESULT result; // make sure this is here so constructor
// gets called each time
retval = result.parse_server(mf);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse result in scheduler reply: %d", retval
);
} else {
results.push_back(result);
}
} else if (match_tag(buf, "<result_ack>")) {
RESULT result;
retval = result.parse_ack(in);
if (retval) {
msg_printf(project, MSG_ERROR,
"Can't parse result ack in scheduler reply: %d", retval
);
} else {
result_acks.push_back(result);
}
} else if (parse_str(buf, "<delete_file_info>", delete_file_name, sizeof(delete_file_name))) {
STRING256 delete_file;
strcpy(delete_file.text, delete_file_name);
file_deletes.push_back(delete_file);
} else if (parse_str(buf, "<message", msg_buf, sizeof(msg_buf))) {
parse_attr(buf, "priority", pri_buf, sizeof(pri_buf));
USER_MESSAGE um(msg_buf, pri_buf);
messages.push_back(um);
continue;
} else if (match_tag(buf, "<message_ack/>")) {
message_ack = true;
} else if (match_tag(buf, "<project_is_down/>")) {
project_is_down = true;
} else if (parse_str(buf, "<email_hash>", project->email_hash, sizeof(project->email_hash))) {
continue;
} else if (parse_str(buf, "<cross_project_id>", project->cross_project_id, sizeof(project->cross_project_id))) {
continue;
} else if (match_tag(buf, "<trickle_down>")) {
retval = gstate.handle_trickle_down(project, in);
if (retval) {
msg_printf(project, MSG_ERROR,
"handle_trickle_down failed: %d\n", retval
);
}
continue;
} else if (match_tag(buf, "<non_cpu_intensive/>")) {
project->non_cpu_intensive = true;
continue;
} else if (parse_int(buf, "<non_cpu_intensive>", x)) {
project->non_cpu_intensive = (x != 0);
continue;
} else if (match_tag(buf, "<request_file_list/>")) {
send_file_list = true;
} else if (strlen(buf)>1){
scope_messages.printf("SCHEDULER_REPLY::parse(): unrecognized %s\n", buf);
}
}
if (found_start_tag) {
msg_printf(project, MSG_ERROR, "No close tag in scheduler reply\n");
} else {
msg_printf(project, MSG_ERROR, "No start tag in scheduler reply\n");
}
return ERR_XML_PARSE;
}
USER_MESSAGE::USER_MESSAGE(char* m, char* p) {
message = m;
priority = p;
}
const char *BOINC_RCSID_11c806525b = "$Id$";
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