20f32a33d2
MFC after: 1 week
830 lines
17 KiB
Plaintext
830 lines
17 KiB
Plaintext
%{
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/*-
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* Copyright (c) 2009-2010 The FreeBSD Foundation
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* Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>
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* All rights reserved.
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*
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* This software was developed by Pawel Jakub Dawidek under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h> /* MAXHOSTNAMELEN */
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#include <sys/queue.h>
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#include <sys/sysctl.h>
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#include <arpa/inet.h>
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#include <assert.h>
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#include <err.h>
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#include <stdio.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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#include <pjdlog.h>
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#include "hast.h"
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extern int depth;
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extern int lineno;
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extern FILE *yyin;
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extern char *yytext;
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static struct hastd_config *lconfig;
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static struct hast_resource *curres;
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static bool mynode, hadmynode;
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static char depth0_control[HAST_ADDRSIZE];
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static char depth0_listen[HAST_ADDRSIZE];
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static int depth0_replication;
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static int depth0_checksum;
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static int depth0_compression;
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static int depth0_timeout;
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static char depth0_exec[PATH_MAX];
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static char depth1_provname[PATH_MAX];
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static char depth1_localpath[PATH_MAX];
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extern void yyrestart(FILE *);
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static int
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isitme(const char *name)
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{
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char buf[MAXHOSTNAMELEN];
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char *pos;
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size_t bufsize;
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/*
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* First check if the give name matches our full hostname.
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*/
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if (gethostname(buf, sizeof(buf)) < 0) {
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pjdlog_errno(LOG_ERR, "gethostname() failed");
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return (-1);
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}
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if (strcmp(buf, name) == 0)
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return (1);
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/*
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* Now check if it matches first part of the host name.
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*/
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pos = strchr(buf, '.');
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if (pos != NULL && pos != buf && strncmp(buf, name, pos - buf) == 0)
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return (1);
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/*
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* At the end check if name is equal to our host's UUID.
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*/
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bufsize = sizeof(buf);
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if (sysctlbyname("kern.hostuuid", buf, &bufsize, NULL, 0) < 0) {
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pjdlog_errno(LOG_ERR, "sysctlbyname(kern.hostuuid) failed");
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return (-1);
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}
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if (strcasecmp(buf, name) == 0)
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return (1);
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/*
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* Looks like this isn't about us.
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*/
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return (0);
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}
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static int
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node_names(char **namesp)
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{
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static char names[MAXHOSTNAMELEN * 3];
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char buf[MAXHOSTNAMELEN];
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char *pos;
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size_t bufsize;
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if (gethostname(buf, sizeof(buf)) < 0) {
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pjdlog_errno(LOG_ERR, "gethostname() failed");
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return (-1);
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}
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/* First component of the host name. */
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pos = strchr(buf, '.');
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if (pos != NULL && pos != buf) {
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(void)strlcpy(names, buf, MIN((size_t)(pos - buf + 1),
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sizeof(names)));
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(void)strlcat(names, ", ", sizeof(names));
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}
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/* Full host name. */
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(void)strlcat(names, buf, sizeof(names));
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(void)strlcat(names, ", ", sizeof(names));
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/* Host UUID. */
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bufsize = sizeof(buf);
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if (sysctlbyname("kern.hostuuid", buf, &bufsize, NULL, 0) < 0) {
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pjdlog_errno(LOG_ERR, "sysctlbyname(kern.hostuuid) failed");
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return (-1);
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}
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(void)strlcat(names, buf, sizeof(names));
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*namesp = names;
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return (0);
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}
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void
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yyerror(const char *str)
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{
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pjdlog_error("Unable to parse configuration file at line %d near '%s': %s",
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lineno, yytext, str);
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}
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struct hastd_config *
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yy_config_parse(const char *config, bool exitonerror)
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{
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int ret;
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curres = NULL;
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mynode = false;
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depth = 0;
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lineno = 0;
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depth0_timeout = HAST_TIMEOUT;
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depth0_replication = HAST_REPLICATION_FULLSYNC;
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depth0_checksum = HAST_CHECKSUM_NONE;
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depth0_compression = HAST_COMPRESSION_HOLE;
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strlcpy(depth0_control, HAST_CONTROL, sizeof(depth0_control));
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strlcpy(depth0_listen, HASTD_LISTEN, sizeof(depth0_listen));
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depth0_exec[0] = '\0';
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lconfig = calloc(1, sizeof(*lconfig));
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if (lconfig == NULL) {
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pjdlog_error("Unable to allocate memory for configuration.");
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if (exitonerror)
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exit(EX_TEMPFAIL);
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return (NULL);
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}
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TAILQ_INIT(&lconfig->hc_resources);
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yyin = fopen(config, "r");
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if (yyin == NULL) {
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pjdlog_errno(LOG_ERR, "Unable to open configuration file %s",
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config);
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yy_config_free(lconfig);
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if (exitonerror)
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exit(EX_OSFILE);
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return (NULL);
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}
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yyrestart(yyin);
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ret = yyparse();
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fclose(yyin);
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if (ret != 0) {
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yy_config_free(lconfig);
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if (exitonerror)
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exit(EX_CONFIG);
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return (NULL);
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}
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/*
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* Let's see if everything is set up.
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*/
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if (lconfig->hc_controladdr[0] == '\0') {
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strlcpy(lconfig->hc_controladdr, depth0_control,
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sizeof(lconfig->hc_controladdr));
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}
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if (lconfig->hc_listenaddr[0] == '\0') {
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strlcpy(lconfig->hc_listenaddr, depth0_listen,
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sizeof(lconfig->hc_listenaddr));
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}
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TAILQ_FOREACH(curres, &lconfig->hc_resources, hr_next) {
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assert(curres->hr_provname[0] != '\0');
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assert(curres->hr_localpath[0] != '\0');
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assert(curres->hr_remoteaddr[0] != '\0');
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if (curres->hr_replication == -1) {
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/*
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* Replication is not set at resource-level.
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* Use global or default setting.
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*/
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curres->hr_replication = depth0_replication;
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}
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if (curres->hr_replication == HAST_REPLICATION_MEMSYNC ||
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curres->hr_replication == HAST_REPLICATION_ASYNC) {
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pjdlog_warning("Replication mode \"%s\" is not implemented, falling back to \"%s\".",
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curres->hr_replication == HAST_REPLICATION_MEMSYNC ?
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"memsync" : "async", "fullsync");
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curres->hr_replication = HAST_REPLICATION_FULLSYNC;
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}
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if (curres->hr_checksum == -1) {
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/*
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* Checksum is not set at resource-level.
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* Use global or default setting.
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*/
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curres->hr_checksum = depth0_checksum;
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}
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if (curres->hr_compression == -1) {
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/*
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* Compression is not set at resource-level.
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* Use global or default setting.
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*/
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curres->hr_compression = depth0_compression;
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}
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if (curres->hr_timeout == -1) {
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/*
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* Timeout is not set at resource-level.
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* Use global or default setting.
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*/
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curres->hr_timeout = depth0_timeout;
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}
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if (curres->hr_exec[0] == '\0') {
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/*
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* Exec is not set at resource-level.
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* Use global or default setting.
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*/
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strlcpy(curres->hr_exec, depth0_exec,
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sizeof(curres->hr_exec));
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}
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}
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return (lconfig);
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}
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void
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yy_config_free(struct hastd_config *config)
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{
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struct hast_resource *res;
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while ((res = TAILQ_FIRST(&config->hc_resources)) != NULL) {
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TAILQ_REMOVE(&config->hc_resources, res, hr_next);
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free(res);
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}
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free(config);
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}
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%}
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%token CONTROL LISTEN PORT REPLICATION CHECKSUM COMPRESSION
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%token TIMEOUT EXEC EXTENTSIZE RESOURCE NAME LOCAL REMOTE SOURCE ON
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%token FULLSYNC MEMSYNC ASYNC NONE CRC32 SHA256 HOLE LZF
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%token NUM STR OB CB
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%type <num> replication_type
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%type <num> checksum_type
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%type <num> compression_type
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%union
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{
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int num;
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char *str;
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}
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%token <num> NUM
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%token <str> STR
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%%
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statements:
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statements statement
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;
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statement:
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control_statement
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listen_statement
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replication_statement
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checksum_statement
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compression_statement
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timeout_statement
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exec_statement
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node_statement
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resource_statement
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;
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control_statement: CONTROL STR
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{
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switch (depth) {
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case 0:
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if (strlcpy(depth0_control, $2,
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sizeof(depth0_control)) >=
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sizeof(depth0_control)) {
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pjdlog_error("control argument is too long.");
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free($2);
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return (1);
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}
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break;
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case 1:
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if (!mynode)
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break;
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if (strlcpy(lconfig->hc_controladdr, $2,
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sizeof(lconfig->hc_controladdr)) >=
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sizeof(lconfig->hc_controladdr)) {
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pjdlog_error("control argument is too long.");
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free($2);
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return (1);
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}
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break;
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default:
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assert(!"control at wrong depth level");
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}
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free($2);
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}
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;
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listen_statement: LISTEN STR
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{
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switch (depth) {
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case 0:
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if (strlcpy(depth0_listen, $2,
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sizeof(depth0_listen)) >=
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sizeof(depth0_listen)) {
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pjdlog_error("listen argument is too long.");
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free($2);
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return (1);
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}
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break;
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case 1:
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if (!mynode)
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break;
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if (strlcpy(lconfig->hc_listenaddr, $2,
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sizeof(lconfig->hc_listenaddr)) >=
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sizeof(lconfig->hc_listenaddr)) {
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pjdlog_error("listen argument is too long.");
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free($2);
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return (1);
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}
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break;
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default:
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assert(!"listen at wrong depth level");
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}
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free($2);
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}
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;
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replication_statement: REPLICATION replication_type
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{
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switch (depth) {
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case 0:
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depth0_replication = $2;
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break;
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case 1:
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if (curres != NULL)
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curres->hr_replication = $2;
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break;
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default:
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assert(!"replication at wrong depth level");
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}
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}
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;
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replication_type:
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FULLSYNC { $$ = HAST_REPLICATION_FULLSYNC; }
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MEMSYNC { $$ = HAST_REPLICATION_MEMSYNC; }
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ASYNC { $$ = HAST_REPLICATION_ASYNC; }
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;
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checksum_statement: CHECKSUM checksum_type
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{
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switch (depth) {
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case 0:
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depth0_checksum = $2;
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break;
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case 1:
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if (curres != NULL)
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curres->hr_checksum = $2;
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break;
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default:
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assert(!"checksum at wrong depth level");
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}
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}
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;
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checksum_type:
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NONE { $$ = HAST_CHECKSUM_NONE; }
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CRC32 { $$ = HAST_CHECKSUM_CRC32; }
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SHA256 { $$ = HAST_CHECKSUM_SHA256; }
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;
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compression_statement: COMPRESSION compression_type
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{
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switch (depth) {
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case 0:
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depth0_compression = $2;
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break;
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case 1:
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if (curres != NULL)
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curres->hr_compression = $2;
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break;
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default:
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assert(!"compression at wrong depth level");
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}
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}
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;
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compression_type:
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NONE { $$ = HAST_COMPRESSION_NONE; }
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HOLE { $$ = HAST_COMPRESSION_HOLE; }
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LZF { $$ = HAST_COMPRESSION_LZF; }
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;
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timeout_statement: TIMEOUT NUM
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{
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if ($2 <= 0) {
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pjdlog_error("Negative or zero timeout.");
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return (1);
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}
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switch (depth) {
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case 0:
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depth0_timeout = $2;
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break;
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case 1:
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if (curres != NULL)
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curres->hr_timeout = $2;
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break;
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default:
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assert(!"timeout at wrong depth level");
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}
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}
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;
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exec_statement: EXEC STR
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{
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switch (depth) {
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case 0:
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if (strlcpy(depth0_exec, $2, sizeof(depth0_exec)) >=
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sizeof(depth0_exec)) {
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pjdlog_error("Exec path is too long.");
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free($2);
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return (1);
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}
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break;
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case 1:
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if (curres == NULL)
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break;
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if (strlcpy(curres->hr_exec, $2,
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sizeof(curres->hr_exec)) >=
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sizeof(curres->hr_exec)) {
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pjdlog_error("Exec path is too long.");
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free($2);
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return (1);
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}
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break;
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default:
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assert(!"exec at wrong depth level");
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}
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free($2);
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}
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;
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node_statement: ON node_start OB node_entries CB
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{
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mynode = false;
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}
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;
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node_start: STR
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{
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switch (isitme($1)) {
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case -1:
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free($1);
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return (1);
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case 0:
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break;
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case 1:
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mynode = true;
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break;
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default:
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assert(!"invalid isitme() return value");
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}
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free($1);
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}
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;
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node_entries:
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node_entries node_entry
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;
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node_entry:
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control_statement
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listen_statement
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;
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resource_statement: RESOURCE resource_start OB resource_entries CB
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{
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if (curres != NULL) {
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/*
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* There must be section for this node, at least with
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* remote address configuration.
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*/
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if (!hadmynode) {
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char *names;
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if (node_names(&names) != 0)
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return (1);
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pjdlog_error("No resource %s configuration for this node (acceptable node names: %s).",
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curres->hr_name, names);
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return (1);
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}
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/*
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* Let's see there are some resource-level settings
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* that we can use for node-level settings.
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*/
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if (curres->hr_provname[0] == '\0' &&
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depth1_provname[0] != '\0') {
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/*
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* Provider name is not set at node-level,
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* but is set at resource-level, use it.
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*/
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strlcpy(curres->hr_provname, depth1_provname,
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sizeof(curres->hr_provname));
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}
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if (curres->hr_localpath[0] == '\0' &&
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depth1_localpath[0] != '\0') {
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/*
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* Path to local provider is not set at
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|
* node-level, but is set at resource-level,
|
|
* use it.
|
|
*/
|
|
strlcpy(curres->hr_localpath, depth1_localpath,
|
|
sizeof(curres->hr_localpath));
|
|
}
|
|
|
|
/*
|
|
* If provider name is not given, use resource name
|
|
* as provider name.
|
|
*/
|
|
if (curres->hr_provname[0] == '\0') {
|
|
strlcpy(curres->hr_provname, curres->hr_name,
|
|
sizeof(curres->hr_provname));
|
|
}
|
|
|
|
/*
|
|
* Remote address has to be configured at this point.
|
|
*/
|
|
if (curres->hr_remoteaddr[0] == '\0') {
|
|
pjdlog_error("Remote address not configured for resource %s.",
|
|
curres->hr_name);
|
|
return (1);
|
|
}
|
|
/*
|
|
* Path to local provider has to be configured at this
|
|
* point.
|
|
*/
|
|
if (curres->hr_localpath[0] == '\0') {
|
|
pjdlog_error("Path to local component not configured for resource %s.",
|
|
curres->hr_name);
|
|
return (1);
|
|
}
|
|
|
|
/* Put it onto resource list. */
|
|
TAILQ_INSERT_TAIL(&lconfig->hc_resources, curres, hr_next);
|
|
curres = NULL;
|
|
}
|
|
}
|
|
;
|
|
|
|
resource_start: STR
|
|
{
|
|
/* Check if there is no duplicate entry. */
|
|
TAILQ_FOREACH(curres, &lconfig->hc_resources, hr_next) {
|
|
if (strcmp(curres->hr_name, $1) == 0) {
|
|
pjdlog_error("Resource %s configured more than once.",
|
|
curres->hr_name);
|
|
free($1);
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Clear those, so we can tell if they were set at
|
|
* resource-level or not.
|
|
*/
|
|
depth1_provname[0] = '\0';
|
|
depth1_localpath[0] = '\0';
|
|
hadmynode = false;
|
|
|
|
curres = calloc(1, sizeof(*curres));
|
|
if (curres == NULL) {
|
|
pjdlog_error("Unable to allocate memory for resource.");
|
|
free($1);
|
|
return (1);
|
|
}
|
|
if (strlcpy(curres->hr_name, $1,
|
|
sizeof(curres->hr_name)) >=
|
|
sizeof(curres->hr_name)) {
|
|
pjdlog_error("Resource name is too long.");
|
|
free($1);
|
|
return (1);
|
|
}
|
|
free($1);
|
|
curres->hr_role = HAST_ROLE_INIT;
|
|
curres->hr_previous_role = HAST_ROLE_INIT;
|
|
curres->hr_replication = -1;
|
|
curres->hr_checksum = -1;
|
|
curres->hr_compression = -1;
|
|
curres->hr_timeout = -1;
|
|
curres->hr_exec[0] = '\0';
|
|
curres->hr_provname[0] = '\0';
|
|
curres->hr_localpath[0] = '\0';
|
|
curres->hr_localfd = -1;
|
|
curres->hr_remoteaddr[0] = '\0';
|
|
curres->hr_sourceaddr[0] = '\0';
|
|
curres->hr_ggateunit = -1;
|
|
}
|
|
;
|
|
|
|
resource_entries:
|
|
|
|
|
resource_entries resource_entry
|
|
;
|
|
|
|
resource_entry:
|
|
replication_statement
|
|
|
|
|
checksum_statement
|
|
|
|
|
compression_statement
|
|
|
|
|
timeout_statement
|
|
|
|
|
exec_statement
|
|
|
|
|
name_statement
|
|
|
|
|
local_statement
|
|
|
|
|
resource_node_statement
|
|
;
|
|
|
|
name_statement: NAME STR
|
|
{
|
|
switch (depth) {
|
|
case 1:
|
|
if (strlcpy(depth1_provname, $2,
|
|
sizeof(depth1_provname)) >=
|
|
sizeof(depth1_provname)) {
|
|
pjdlog_error("name argument is too long.");
|
|
free($2);
|
|
return (1);
|
|
}
|
|
break;
|
|
case 2:
|
|
if (!mynode)
|
|
break;
|
|
assert(curres != NULL);
|
|
if (strlcpy(curres->hr_provname, $2,
|
|
sizeof(curres->hr_provname)) >=
|
|
sizeof(curres->hr_provname)) {
|
|
pjdlog_error("name argument is too long.");
|
|
free($2);
|
|
return (1);
|
|
}
|
|
break;
|
|
default:
|
|
assert(!"name at wrong depth level");
|
|
}
|
|
free($2);
|
|
}
|
|
;
|
|
|
|
local_statement: LOCAL STR
|
|
{
|
|
switch (depth) {
|
|
case 1:
|
|
if (strlcpy(depth1_localpath, $2,
|
|
sizeof(depth1_localpath)) >=
|
|
sizeof(depth1_localpath)) {
|
|
pjdlog_error("local argument is too long.");
|
|
free($2);
|
|
return (1);
|
|
}
|
|
break;
|
|
case 2:
|
|
if (!mynode)
|
|
break;
|
|
assert(curres != NULL);
|
|
if (strlcpy(curres->hr_localpath, $2,
|
|
sizeof(curres->hr_localpath)) >=
|
|
sizeof(curres->hr_localpath)) {
|
|
pjdlog_error("local argument is too long.");
|
|
free($2);
|
|
return (1);
|
|
}
|
|
break;
|
|
default:
|
|
assert(!"local at wrong depth level");
|
|
}
|
|
free($2);
|
|
}
|
|
;
|
|
|
|
resource_node_statement:ON resource_node_start OB resource_node_entries CB
|
|
{
|
|
mynode = false;
|
|
}
|
|
;
|
|
|
|
resource_node_start: STR
|
|
{
|
|
if (curres != NULL) {
|
|
switch (isitme($1)) {
|
|
case -1:
|
|
free($1);
|
|
return (1);
|
|
case 0:
|
|
break;
|
|
case 1:
|
|
mynode = hadmynode = true;
|
|
break;
|
|
default:
|
|
assert(!"invalid isitme() return value");
|
|
}
|
|
}
|
|
free($1);
|
|
}
|
|
;
|
|
|
|
resource_node_entries:
|
|
|
|
|
resource_node_entries resource_node_entry
|
|
;
|
|
|
|
resource_node_entry:
|
|
name_statement
|
|
|
|
|
local_statement
|
|
|
|
|
remote_statement
|
|
|
|
|
source_statement
|
|
;
|
|
|
|
remote_statement: REMOTE STR
|
|
{
|
|
assert(depth == 2);
|
|
if (mynode) {
|
|
assert(curres != NULL);
|
|
if (strlcpy(curres->hr_remoteaddr, $2,
|
|
sizeof(curres->hr_remoteaddr)) >=
|
|
sizeof(curres->hr_remoteaddr)) {
|
|
pjdlog_error("remote argument is too long.");
|
|
free($2);
|
|
return (1);
|
|
}
|
|
}
|
|
free($2);
|
|
}
|
|
;
|
|
|
|
source_statement: SOURCE STR
|
|
{
|
|
assert(depth == 2);
|
|
if (mynode) {
|
|
assert(curres != NULL);
|
|
if (strlcpy(curres->hr_sourceaddr, $2,
|
|
sizeof(curres->hr_sourceaddr)) >=
|
|
sizeof(curres->hr_sourceaddr)) {
|
|
pjdlog_error("source argument is too long.");
|
|
free($2);
|
|
return (1);
|
|
}
|
|
}
|
|
free($2);
|
|
}
|
|
;
|