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boinc/tools/backend_lib.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
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <cassert>
#include <unistd.h>
#include <cmath>
#include <sys/types.h>
#include <sys/stat.h>
#include "boinc_db.h"
#include "crypt.h"
#include "error_numbers.h"
#include "md5_file.h"
#include "parse.h"
#include "util.h"
#include "filesys.h"
#include "sched_util.h"
#include "backend_lib.h"
#ifdef _USING_FCGI_
#include "fcgi_stdio.h"
#else
#define FCGI_ToFILE(x) (x)
#endif
static struct random_init {
random_init() {
srand48(getpid() + time(0));
}
} random_init;
int read_file(FILE* f, char* buf, int len) {
int n = fread(buf, 1, len, f);
buf[n] = 0;
return 0;
}
int read_filename(const char* path, char* buf, int len) {
int retval;
FILE* f = fopen(path, "r");
if (!f) return -1;
retval = read_file(f, buf, len);
fclose(f);
return retval;
}
// see checkin notes Dec 30 2004
//
static bool got_md5_info(
const char *path,
char *md5data,
double *nbytes
) {
bool retval=false;
// look for file named FILENAME.md5 containing md5sum and length.
// If found, and newer mod time than file, read md5 sum and file
// length from it.
FILE *fp;
char md5name[512];
struct stat md5stat, filestat;
char endline='\0';
sprintf(md5name, "%s.md5", path);
// get mod times for file
if (stat(path, &filestat))
return retval;
// get mod time for md5 cache file
if (stat(md5name, &md5stat))
return retval;
// if cached md5 newer, then open it
if (!(fp=fopen(md5name, "r")))
return retval;
// read two quantities: md5 sum and length. If we can't read
// these, or there is MORE stuff in the file' it's not an md5
// cache file
if (3 == fscanf(FCGI_ToFILE(fp), "%s %lf%c", md5data, nbytes, &endline) &&
endline=='\n' &&
EOF==fgetc(FCGI_ToFILE(fp))
)
retval=true;
fclose(fp);
// if this is one of our cached md5 files, but it's OLDER than the
// data file which it supposedly corresponds to, delete it.
if (retval && md5stat.st_mtime<filestat.st_mtime) {
unlink(md5name);
retval=false;
}
return retval;
}
// see checkin notes Dec 30 2004
//
static void write_md5_info(
const char *path,
const char *md5,
double nbytes
) {
// Write file FILENAME.md5 containing md5sum and length
FILE *fp;
char md5name[512];
struct stat statbuf;
int retval;
// if file already exists with this name, don't touch it.
sprintf(md5name, "%s.md5", path);
if (!stat(md5name, &statbuf))
return;
// if can't open the file, give up
if (!(fp=fopen(md5name, "w")))
return;
retval=fprintf(fp,"%s %.15e\n", md5, nbytes);
fclose(fp);
// if we didn't write properly to the file, delete it.
if (retval<0)
unlink(md5name);
return;
}
// process WU template
//
static int process_wu_template(
WORKUNIT& wu,
char* tmplate,
const char** infiles,
int ninfiles,
SCHED_CONFIG& config
) {
char* p;
char buf[LARGE_BLOB_SIZE], md5[33], path[256], url[256], top_download_path[256];
std::string out;
int retval, file_number;
double nbytes;
char open_name[256];
bool found=false;
out = "";
for (p=strtok(tmplate, "\n"); p; p=strtok(0, "\n")) {
if (match_tag(p, "<file_info>")) {
file_number = -1;
out += "<file_info>\n";
while (1) {
p = strtok(0, "\n");
if (!p) break;
if (parse_int(p, "<number>", file_number)) {
continue;
} else if (match_tag(p, "</file_info>")) {
if (file_number < 0) {
fprintf(stderr, "No file number found\n");
return ERR_XML_PARSE;
}
if (file_number >= ninfiles) {
fprintf(stderr, "Too few input files given; need at least %d\n", file_number+1);
return ERR_XML_PARSE;
}
dir_hier_path(
infiles[file_number], config.download_dir,
config.uldl_dir_fanout, true,
path, true
);
// if file isn't found in hierarchy,
// look for it at top level and copy
//
if (!boinc_file_exists(path)) {
sprintf(top_download_path,
"%s/%s",config.download_dir,
infiles[file_number]
);
boinc_copy(top_download_path, path);
}
if (!config.cache_md5_info || !got_md5_info(path, md5, &nbytes)) {
retval = md5_file(path, md5, nbytes);
if (retval) {
fprintf(stderr, "process_wu_template: md5_file %d\n", retval);
return retval;
}
else if (config.cache_md5_info) {
write_md5_info(path, md5, nbytes);
}
}
dir_hier_url(
infiles[file_number], config.download_url,
config.uldl_dir_fanout, true,
url
);
sprintf(buf,
" <name>%s</name>\n"
" <url>%s</url>\n"
" <md5_cksum>%s</md5_cksum>\n"
" <nbytes>%.0f</nbytes>\n"
"</file_info>\n",
infiles[file_number],
url,
md5,
nbytes
);
out += buf;
break;
} else {
out += p;
out += "\n";
}
}
} else if (match_tag(p, "<workunit>")) {
found = true;
out += "<workunit>\n";
} else if (match_tag(p, "</workunit>")) {
out += "</workunit>\n";
} else if (match_tag(p, "<file_ref>")) {
file_number = -1;
while (1) {
p = strtok(0, "\n");
if (!p) break;
if (parse_int(p, "<file_number>", file_number)) {
continue;
} else if (parse_str(p, "<open_name>", open_name, sizeof(open_name))) {
continue;
} else if (match_tag(p, "</file_ref>")) {
if (file_number < 0) {
fprintf(stderr, "No file number found\n");
return ERR_XML_PARSE;
}
sprintf(buf,
"<file_ref>\n"
" <file_name>%s</file_name>\n"
" <open_name>%s</open_name>\n"
"</file_ref>\n",
infiles[file_number],
open_name
);
out += buf;
break;
}
}
} else if (parse_double(p, "<rsc_fpops_est>", wu.rsc_fpops_est)) {
continue;
} else if (parse_double(p, "<rsc_fpops_bound>", wu.rsc_fpops_bound)) {
continue;
} else if (parse_double(p, "<rsc_memory_bound>", wu.rsc_memory_bound)) {
continue;
} else if (parse_double(p, "<rsc_disk_bound>", wu.rsc_disk_bound)) {
continue;
} else if (parse_int(p, "<batch>", wu.batch)) {
continue;
} else if (parse_int(p, "<delay_bound>", wu.delay_bound)) {
continue;
} else if (parse_int(p, "<min_quorum>", wu.min_quorum)) {
continue;
} else if (parse_int(p, "<target_nresults>", wu.target_nresults)) {
continue;
} else if (parse_int(p, "<max_error_results>", wu.max_error_results)) {
continue;
} else if (parse_int(p, "<max_total_results>", wu.max_total_results)) {
continue;
} else if (parse_int(p, "<max_success_results>", wu.max_success_results)) {
continue;
} else {
out += p;
out += "\n";
}
}
if (!found) {
fprintf(stderr, "create_work: bad WU template - no <workunit>\n");
return -1;
}
if (out.size() > sizeof(wu.xml_doc)-1) {
fprintf(stderr,
"create_work: WU XML field is too long (%d bytes; max is %d)\n",
out.size(), sizeof(wu.xml_doc)-1
);
return ERR_BUFFER_OVERFLOW;
}
strcpy(wu.xml_doc, out.c_str());
return 0;
}
// Set the time-varying fields of a result to their initial state.
// This is used to create clones of existing results,
// so set only the time-varying fields
//
void initialize_result(DB_RESULT& result, TRANSITIONER_ITEM& wu) {
result.id = 0;
result.create_time = time(0);
result.workunitid = wu.id;
result.server_state = RESULT_SERVER_STATE_UNSENT;
result.hostid = 0;
result.report_deadline = 0;
result.sent_time = 0;
result.received_time = 0;
result.client_state = 0;
result.cpu_time = 0;
strcpy(result.xml_doc_out, "");
strcpy(result.stderr_out, "");
result.outcome = RESULT_OUTCOME_INIT;
result.file_delete_state = ASSIMILATE_INIT;
result.validate_state = VALIDATE_STATE_INIT;
result.claimed_credit = 0;
result.granted_credit = 0;
result.appid = wu.appid;
result.priority = wu.priority;
}
// Create a new result for the given WU.
// This is called ONLY from the transitioner
//
int create_result(
TRANSITIONER_ITEM& wu,
char* result_template_filename,
char* result_name_suffix,
R_RSA_PRIVATE_KEY& key,
SCHED_CONFIG& config,
char* query_string
// if nonzero, write value list here; else do insert
) {
DB_RESULT result;
char base_outfile_name[256];
char result_template[LARGE_BLOB_SIZE];
int retval;
result.clear();
initialize_result(result, wu);
sprintf(result.name, "%s_%s", wu.name, result_name_suffix);
sprintf(base_outfile_name, "%s_", result.name);
retval = read_filename(result_template_filename, result_template, sizeof(result_template));
if (retval) {
fprintf(stderr,
"Failed to read result template file '%s': %d\n",
result_template_filename, retval
);
return retval;
}
retval = process_result_template(
result_template,
key,
base_outfile_name,
config
);
if (strlen(result_template) > sizeof(result.xml_doc_in)-1) {
fprintf(stderr,
"result XML doc is too long: %d bytes, max is %d\n",
strlen(result_template), sizeof(result.xml_doc_in)-1
);
return ERR_BUFFER_OVERFLOW;
}
safe_strncpy(result.xml_doc_in, result_template, sizeof(result.xml_doc_in));
result.random = lrand48();
if (query_string) {
result.db_print_values(query_string);
} else {
retval = result.insert();
if (retval) {
fprintf(stderr, "result.insert(): %d\n", retval);
return retval;
}
}
// if using locality scheduling, advertise data file
// associated with this newly-created result
//
if (config.locality_scheduling) {
char datafilename[512];
char *last=strstr(result.name, "__");
if (result.name<last && last<(result.name+255)) {
sprintf(datafilename, "../locality_scheduling/working_set_removal/");
strncat(datafilename, result.name, last-result.name);
unlink(datafilename);
sprintf(datafilename, "../locality_scheduling/work_available/");
strncat(datafilename, result.name, last-result.name);
boinc_touch_file(datafilename);
}
}
return 0;
}
// make sure a WU's input files are actually there
//
int check_files(char** infiles, int ninfiles, SCHED_CONFIG& config) {
int i;
char path[256];
for (i=0; i<ninfiles; i++) {
dir_hier_path(
infiles[i], config.download_dir, config.uldl_dir_fanout, true, path
);
if (!boinc_file_exists(path)) {
return 1;
}
}
return 0;
}
int create_work(
DB_WORKUNIT& wu,
const char* _wu_template,
const char* result_template_filename,
const char* result_template_filepath,
const char** infiles,
int ninfiles,
SCHED_CONFIG& config
) {
int retval;
char _result_template[LARGE_BLOB_SIZE];
char wu_template[LARGE_BLOB_SIZE];
#if 0
retval = check_files(infiles, ninfiles, config);
if (retval) {
fprintf(stderr, "Missing input file: %s\n", infiles[0]);
return -1;
}
#endif
strcpy(wu_template, _wu_template);
wu.create_time = time(0);
retval = process_wu_template(
wu, wu_template, infiles, ninfiles, config
);
if (retval) {
fprintf(stderr, "process_wu_template: %d\n", retval);
return retval;
}
retval = read_filename(
result_template_filepath, _result_template, sizeof(_result_template)
);
if (retval) {
fprintf(stderr, "create_work: can't read result template file %s\n", result_template_filepath);
return retval;
}
if (strlen(result_template_filename) > sizeof(wu.result_template_file)-1) {
fprintf(stderr, "result template filename is too big: %d bytes, max is %d\n",
strlen(result_template_filename), sizeof(wu.result_template_file)-1
);
return ERR_BUFFER_OVERFLOW;
}
safe_strncpy(wu.result_template_file, result_template_filename, sizeof(wu.result_template_file));
wu.transition_time = time(0);
retval = wu.insert();
if (retval) {
fprintf(stderr, "create_work: workunit.insert() %d\n", retval);
return retval;
}
wu.id = boinc_db.insert_id();
return 0;
}
const char *BOINC_RCSID_b5f8b10eb5 = "$Id$";
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