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boinc/client/scheduler_op.C

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// The contents of this file are subject to the Mozilla Public License
// Version 1.0 (the "License"); you may not use this file except in
// compliance with the License. You may obtain a copy of the License at
// http://www.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
// License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is the Berkeley Open Infrastructure for Network Computing.
//
// The Initial Developer of the Original Code is the SETI@home project.
// Portions created by the SETI@home project are Copyright (C) 2002
// University of California at Berkeley. All Rights Reserved.
//
// Contributor(s):
//
#include <stdio.h>
#include <time.h>
#include "client_state.h"
#include "client_types.h"
#include "error_numbers.h"
#include "file_names.h"
#include "log_flags.h"
#include "parse.h"
#include "scheduler_op.h"
SCHEDULER_OP::SCHEDULER_OP(HTTP_OP_SET* h) {
state = SCHEDULER_OP_STATE_IDLE;
http_op.http_op_state = HTTP_STATE_IDLE;
http_ops = h;
}
// try to get enough work to bring us up to high-water mark
//
int SCHEDULER_OP::init_get_work() {
double ns = gstate.work_needed_secs();
must_get_work = true;
project = gstate.next_project(0);
if (project) {
init_op_project(ns);
}
return 0;
}
// report results for a particular project.
// also get work from that project if below high-water mark
//
int SCHEDULER_OP::init_return_results(PROJECT* p, double ns) {
must_get_work = false;
project = p;
return init_op_project(ns);
}
// 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;
if (log_flags.sched_op_debug) {
printf("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.
//
if (project->scheduler_urls.size() == 0) {
init_master_fetch(project);
return 0;
}
url_index = 0;
retval = gstate.make_scheduler_request(project, ns);
if (retval) {
fprintf(stderr, "make_scheduler_request: %d\n", retval);
return retval;
}
return start_rpc();
}
// Set a project's min RPC time to something in the future,
// based on exponential backoff
// TODO: integrate with other backoff sources
//
int SCHEDULER_OP::set_min_rpc_time(PROJECT* p) {
int x = RETRY_BASE_PERIOD;
int i;
int n = p->nrpc_failures;
if (n > RETRY_CAP) n = RETRY_CAP;
for (i=0; i<n; i++) x *= 2;
p->min_rpc_time = time(0) + x;
if (log_flags.sched_op_debug) {
printf(
"setting min RPC time for %s to %d seconds from now\n",
p->master_url, x
);
}
return 0;
}
// low-level routine to initiate an RPC
//
int SCHEDULER_OP::start_rpc() {
FILE *f;
int retval;
strcpy(scheduler_url, project->scheduler_urls[url_index].text);
if (log_flags.sched_ops) {
printf("Sending request to scheduler: %s\n", scheduler_url);
}
if (log_flags.sched_op_debug) {
f = fopen(SCHED_OP_REQUEST_FILE, "r");
printf("--------- SCHEDULER REQUEST ---------\n");
copy_stream(f, stdout);
printf("--------- END ---------\n");
fclose(f);
}
retval = http_op.init_post(
scheduler_url, SCHED_OP_REQUEST_FILE,
SCHED_OP_RESULT_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;
project = p;
if (log_flags.sched_op_debug) {
printf("Fetching master file for %s\n", project->master_url);
}
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;
}
// parse a master file.
//
int SCHEDULER_OP::parse_master_file(vector<STRING256> &urls) {
char buf[256];
STRING256 str;
FILE* f;
f = fopen(MASTER_FILE_NAME, "r");
if (!f) {
fprintf(stderr, "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)) {
urls.push_back(str);
}
}
if (log_flags.sched_op_debug) {
printf("Parsed master file; got %d scheduler URLs\n", urls.size());
}
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(PROJECT& project, 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
//
int SCHEDULER_OP::poll() {
int retval;
vector<STRING256> urls;
bool changed, scheduler_op_done;
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) {
project->master_url_fetch_pending = false;
http_ops->remove(&http_op);
if (http_op.http_op_retval == 0) {
if (log_flags.sched_op_debug) {
printf(
"Got master file from %s; parsing\n",
project->master_url
);
}
retval = parse_master_file(urls);
if (retval == 0) {
changed = update_urls(*project, urls);
if (changed) {
project->min_rpc_time = 0;
project->nrpc_failures = 0;
}
} else {
// master file parse failed. treat like RPC error
//
project->nrpc_failures++;
set_min_rpc_time(project);
if (log_flags.sched_op_debug) {
printf("Master file parse failed\n");
}
}
} else {
// fetch of master file failed. Treat like RPC error
//
project->nrpc_failures++;
set_min_rpc_time(project);
if (log_flags.sched_op_debug) {
printf("Master file fetch failed\n");
}
}
project = gstate.next_project_master_pending();
if (project) {
init_master_fetch(project);
} else {
state = SCHEDULER_OP_STATE_IDLE;
if (log_flags.sched_op_debug) {
printf("Scheduler_op: return to idle state\n");
}
}
}
break;
case SCHEDULER_OP_STATE_RPC:
// here we're doing a scheduler RPC to some project
//
scheduler_op_done = false;
if (http_op.http_op_state == HTTP_STATE_DONE) {
http_ops->remove(&http_op);
if (http_op.http_op_retval) {
if (log_flags.sched_op_debug) {
printf(
"scheduler RPC to %s failed\n",
project->scheduler_urls[url_index].text
);
}
url_index++;
if (url_index < project->scheduler_urls.size()) {
start_rpc();
} else {
project->nrpc_failures++;
if ((project->nrpc_failures % MASTER_FETCH_PERIOD) == 0) {
project->master_url_fetch_pending = true;
}
set_min_rpc_time(project);
if (must_get_work) {
project = gstate.next_project(project);
if (project) {
init_op_project(gstate.work_needed_secs());
} else {
scheduler_op_done = true;
}
} else {
scheduler_op_done = true;
}
}
} else {
if (log_flags.sched_op_debug) {
printf(
"scheduler RPC to %s succeeded\n",
project->scheduler_urls[url_index].text
);
}
project->nrpc_failures = 0;
gstate.handle_scheduler_reply(project, scheduler_url);
if (must_get_work) {
double x = gstate.work_needed_secs();
if (x > 0) {
project = gstate.next_project(project);
if (project) {
init_op_project(x);
} else {
scheduler_op_done = true;
}
} else {
scheduler_op_done = true;
}
}
}
}
if (scheduler_op_done) {
project = gstate.next_project_master_pending();
if (project) {
init_master_fetch(project);
} else {
state = SCHEDULER_OP_STATE_IDLE;
if (log_flags.sched_op_debug) {
printf("Scheduler_op: return to idle state\n");
}
}
}
break;
default:
break;
}
return 0;
}
SCHEDULER_REPLY::SCHEDULER_REPLY() {
prefs_xml = 0;
code_sign_key = 0;
code_sign_key_signature = 0;
}
SCHEDULER_REPLY::~SCHEDULER_REPLY() {
if (prefs_xml) free(prefs_xml);
if (code_sign_key) free(code_sign_key);
if (code_sign_key_signature) free(code_sign_key_signature);
}
int SCHEDULER_REPLY::parse(FILE* in) {
char buf[256], *p;
int retval;
strcpy(message, "");
strcpy(message_priority, "");
request_delay = 0;
hostid = 0;
prefs_mod_time = 0;
prefs_xml = 0;
code_sign_key = 0;
code_sign_key_signature = 0;
p = fgets(buf, 256, in);
// First part of content should either be tag (HTTP 1.0) or
// hex length of response (HTTP 1.1)
if (!match_tag(buf, "<scheduler_reply>")) {
fprintf(stderr, "SCHEDULER_REPLY::parse(): bad first tag %s\n", buf);
return ERR_XML_PARSE;
}
while (fgets(buf, 256, in)) {
if (match_tag(buf, "<scheduler_reply>")) {
// Do nothing
} else if (match_tag(buf, "</scheduler_reply>")) {
return 0;
} else if (parse_int(buf, "<hostid>", hostid)) {
continue;
} else if (parse_int(buf, "<request_delay>", request_delay)) {
continue;
} else if (parse_int(buf, "<prefs_mod_time>", prefs_mod_time)) {
continue;
} else if (match_tag(buf, "<preferences>")) {
retval = dup_element_contents(in, "</preferences>", &prefs_xml);
if (retval) return ERR_XML_PARSE;
} else if (match_tag(buf, "<code_sign_key>")) {
retval = dup_element_contents(in, "</code_sign_key>", &code_sign_key);
//fprintf(stderr, "code_sign_key: %s\n", code_sign_key);
if (retval) {
fprintf(stderr, "error: SCHEDULER_REPLY.parse: xml parsing error\n");
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;
app.parse(in);
apps.push_back(app);
} else if (match_tag(buf, "<file_info>")) {
FILE_INFO file_info;
file_info.parse(in, true);
file_infos.push_back(file_info);
} else if (match_tag(buf, "<app_version>")) {
APP_VERSION av;
av.parse(in);
app_versions.push_back(av);
} else if (match_tag(buf, "<workunit>")) {
WORKUNIT wu;
wu.parse(in);
workunits.push_back(wu);
} else if (match_tag(buf, "<result>")) {
RESULT result; // make sure this is here so constructor
// gets called each time
result.parse_server(in);
results.push_back(result);
} else if (match_tag(buf, "<result_ack>")) {
RESULT result;
result.parse_ack(in);
result_acks.push_back(result);
} else if (parse_str(buf, "<message", message)) {
parse_attr(buf, "priority", message_priority);
continue;
} else {
fprintf(stderr, "SCHEDULER_REPLY::parse: unrecognized %s\n", buf);
}
}
fprintf(stderr, "SCHEDULER_REPLY::parse: no close tag\n");
return ERR_XML_PARSE;
}
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