/**
* @brief Load parameters from config file
*
* @param[in] config_struct Parsed config file
* @param[out] p_start_info Startup parameters
*
* @return -1 on failure.
*/
int nfs_set_param_from_conf(config_file_t config_struct,
nfs_start_info_t *p_start_info)
{
int rc;
cache_inode_status_t cache_inode_status;
/*
* Initialize exports and clients so config parsing can use them
* early.
*/
client_pkginit();
export_pkginit();
rc = read_log_config(config_struct);
if (rc < 0) {
LogCrit(COMPONENT_INIT,
"Error while parsing log configuration");
return -1;
}
/* Core parameters */
rc = nfs_read_core_conf(config_struct, &nfs_param.core_param);
if (rc < 0) {
LogCrit(COMPONENT_INIT,
"Error while parsing core configuration");
return -1;
} else {
/* No such stanza in configuration file */
if (rc == 1)
LogEvent(COMPONENT_INIT,
"No core configuration found in config file, using default");
else
LogDebug(COMPONENT_INIT,
"core configuration read from config file");
}
/* Worker paramters: ip/name hash table and expiration for each entry */
rc = nfs_read_ip_name_conf(config_struct, &nfs_param.ip_name_param);
if (rc < 0) {
LogCrit(COMPONENT_INIT,
"Error while parsing IP/name configuration");
return -1;
} else {
/* No such stanza in configuration file */
if (rc == 1)
LogDebug(COMPONENT_INIT,
"No IP/name configuration found in config file, using default");
else
LogDebug(COMPONENT_INIT,
"IP/name configuration read from config file");
}
#ifdef _HAVE_GSSAPI
/* NFS kerberos5 configuration */
rc = nfs_read_krb5_conf(config_struct, &nfs_param.krb5_param);
if (rc < 0) {
LogCrit(COMPONENT_INIT,
"Error while parsing NFS/KRB5 configuration for RPCSEC_GSS");
return -1;
} else {
/* No such stanza in configuration file */
if (rc == 1)
LogDebug(COMPONENT_INIT,
"No NFS/KRB5 configuration found in config file, using default");
else
LogDebug(COMPONENT_INIT,
"NFS/KRB5 configuration read from config file");
}
#endif
/* NFSv4 specific configuration */
rc = nfs_read_version4_conf(config_struct, &nfs_param.nfsv4_param);
if (rc < 0) {
LogCrit(COMPONENT_INIT,
"Error while parsing NFSv4 specific configuration");
return -1;
} else {
/* No such stanza in configuration file */
if (rc == 1)
LogDebug(COMPONENT_INIT,
"No NFSv4 specific configuration found in config file, using default");
else
LogDebug(COMPONENT_INIT,
"NFSv4 specific configuration read from config file");
}
#ifdef _USE_9P
rc = _9p_read_conf(config_struct, &nfs_param._9p_param);
if (rc < 0) {
if (rc == -2)
LogDebug(COMPONENT_INIT,
"No 9P configuration found, using default");
else {
LogCrit(COMPONENT_INIT,
"Error while parsing 9P configuration");
return -1;
}
}
#endif
/* Cache inode client parameters */
cache_inode_status =
cache_inode_read_conf_parameter(config_struct,
&nfs_param.cache_param);
if (cache_inode_status != CACHE_INODE_SUCCESS) {
if (cache_inode_status == CACHE_INODE_NOT_FOUND)
LogDebug(COMPONENT_INIT,
"No Cache Inode Client configuration found, using default");
else {
LogCrit(COMPONENT_INIT,
"Error while parsing Cache Inode Client configuration");
return 1;
}
} else
LogDebug(COMPONENT_INIT,
"Cache Inode Client configuration read from config file");
/* Load export entries from parsed file
* returns the number of export entries.
*/
rc = ReadExports(config_struct);
if (rc < 0) {
LogCrit(COMPONENT_INIT, "Error while parsing export entries");
return -1;
} else if (rc == 0) {
LogWarn(COMPONENT_INIT,
"No export entries found in configuration file !!!");
}
LogEvent(COMPONENT_INIT, "Configuration file successfully parsed");
return 0;
}
int main(int argc, char *argv[])
{
char *tempo_exec_name = NULL;
char localmachine[MAXHOSTNAMELEN + 1];
int c;
int dsc;
int rc;
int pidfile;
char *log_path = NULL;
char *exec_name = "nfs-ganesha";
int debug_level = -1;
int detach_flag = true;
bool dump_trace = false;
#ifndef HAVE_DAEMON
int dev_null_fd = 0;
pid_t son_pid;
#endif
sigset_t signals_to_block;
struct config_error_type err_type;
/* Set the server's boot time and epoch */
now(&nfs_ServerBootTime);
nfs_ServerEpoch = (time_t) nfs_ServerBootTime.tv_sec;
srand(nfs_ServerEpoch);
tempo_exec_name = strrchr(argv[0], '/');
if (tempo_exec_name != NULL)
exec_name = main_strdup("exec_name", tempo_exec_name + 1);
if (*exec_name == '\0')
exec_name = argv[0];
/* get host name */
if (gethostname(localmachine, sizeof(localmachine)) != 0) {
fprintf(stderr, "Could not get local host name, exiting...\n");
exit(1);
} else {
nfs_host_name = main_strdup("host_name", localmachine);
}
/* now parsing options with getopt */
while ((c = getopt(argc, argv, options)) != EOF) {
switch (c) {
case 'v':
case '@':
printf("NFS-Ganesha Release = V%s\n", GANESHA_VERSION);
#if !GANESHA_BUILD_RELEASE
/* A little backdoor to keep track of binary versions */
printf("%s compiled on %s at %s\n", exec_name, __DATE__,
__TIME__);
printf("Release comment = %s\n", VERSION_COMMENT);
printf("Git HEAD = %s\n", _GIT_HEAD_COMMIT);
printf("Git Describe = %s\n", _GIT_DESCRIBE);
#endif
exit(0);
break;
case 'L':
/* Default Log */
log_path = main_strdup("log_path", optarg);
break;
case 'N':
/* debug level */
debug_level = ReturnLevelAscii(optarg);
if (debug_level == -1) {
fprintf(stderr,
"Invalid value for option 'N': NIV_NULL, NIV_MAJ, NIV_CRIT, NIV_EVENT, NIV_DEBUG, NIV_MID_DEBUG or NIV_FULL_DEBUG expected.\n");
exit(1);
}
break;
case 'f':
/* config file */
nfs_config_path = main_strdup("config_path", optarg);
break;
case 'p':
/* PID file */
nfs_pidfile_path = main_strdup("pidfile_path", optarg);
break;
case 'F':
/* Don't detach, foreground mode */
detach_flag = false;
break;
case 'R':
/* Shall we manage RPCSEC_GSS ? */
fprintf(stderr,
"\n\nThe -R flag is deprecated, use this syntax in the configuration file instead:\n\n");
fprintf(stderr, "NFS_KRB5\n");
fprintf(stderr, "{\n");
fprintf(stderr,
"\tPrincipalName = nfs@<your_host> ;\n");
fprintf(stderr, "\tKeytabPath = /etc/krb5.keytab ;\n");
fprintf(stderr, "\tActive_krb5 = true ;\n");
fprintf(stderr, "}\n\n\n");
exit(1);
break;
case 'T':
/* Dump the default configuration on stdout */
my_nfs_start_info.dump_default_config = true;
break;
case 'C':
dump_trace = true;
break;
case 'E':
nfs_ServerEpoch = (time_t) atoll(optarg);
break;
case 'h':
fprintf(stderr, usage, exec_name);
exit(0);
default: /* '?' */
fprintf(stderr, "Try '%s -h' for usage\n", exec_name);
exit(1);
}
}
/* initialize memory and logging */
nfs_prereq_init(exec_name, nfs_host_name, debug_level, log_path,
dump_trace);
#if GANESHA_BUILD_RELEASE
LogEvent(COMPONENT_MAIN, "%s Starting: Ganesha Version %s",
exec_name, GANESHA_VERSION);
#else
LogEvent(COMPONENT_MAIN, "%s Starting: %s",
exec_name,
"Ganesha Version " _GIT_DESCRIBE ", built at "
__DATE__ " " __TIME__ " on " BUILD_HOST);
#endif
/* initialize nfs_init */
nfs_init_init();
nfs_check_malloc();
/* Start in background, if wanted */
if (detach_flag) {
#ifdef HAVE_DAEMON
/* daemonize the process (fork, close xterm fds,
* detach from parent process) */
if (daemon(0, 0))
LogFatal(COMPONENT_MAIN,
"Error detaching process from parent: %s",
strerror(errno));
/* In the child process, change the log header
* if not, the header will contain the parent's pid */
set_const_log_str();
#else
/* Step 1: forking a service process */
switch (son_pid = fork()) {
case -1:
/* Fork failed */
LogFatal(COMPONENT_MAIN,
"Could not start nfs daemon (fork error %d (%s)",
errno, strerror(errno));
break;
case 0:
/* This code is within the son (that will actually work)
* Let's make it the leader of its group of process */
if (setsid() == -1) {
LogFatal(COMPONENT_MAIN,
"Could not start nfs daemon (setsid error %d (%s)",
errno, strerror(errno));
}
/* stdin, stdout and stderr should not refer to a tty
* I close 0, 1 & 2 and redirect them to /dev/null */
dev_null_fd = open("/dev/null", O_RDWR);
if (dev_null_fd < 0)
LogFatal(COMPONENT_MAIN,
"Could not open /dev/null: %d (%s)",
errno, strerror(errno));
if (close(STDIN_FILENO) == -1)
LogEvent(COMPONENT_MAIN,
"Error while closing stdin: %d (%s)",
errno, strerror(errno));
else {
LogEvent(COMPONENT_MAIN, "stdin closed");
dup(dev_null_fd);
}
if (close(STDOUT_FILENO) == -1)
LogEvent(COMPONENT_MAIN,
"Error while closing stdout: %d (%s)",
errno, strerror(errno));
else {
LogEvent(COMPONENT_MAIN, "stdout closed");
dup(dev_null_fd);
}
if (close(STDERR_FILENO) == -1)
LogEvent(COMPONENT_MAIN,
"Error while closing stderr: %d (%s)",
errno, strerror(errno));
else {
LogEvent(COMPONENT_MAIN, "stderr closed");
dup(dev_null_fd);
}
if (close(dev_null_fd) == -1)
LogFatal(COMPONENT_MAIN,
"Could not close tmp fd to /dev/null: %d (%s)",
errno, strerror(errno));
/* In the child process, change the log header
* if not, the header will contain the parent's pid */
set_const_log_str();
break;
default:
/* This code is within the parent process,
* it is useless, it must die */
LogFullDebug(COMPONENT_MAIN,
"Starting a child of pid %d",
son_pid);
exit(0);
break;
}
#endif
}
/* Make sure Linux file i/o will return with error
* if file size is exceeded. */
#ifdef _LINUX
signal(SIGXFSZ, SIG_IGN);
#endif
/* Echo PID into pidfile */
pidfile = open(nfs_pidfile_path, O_CREAT | O_RDWR, 0644);
if (pidfile == -1) {
LogFatal(COMPONENT_MAIN, "Can't open pid file %s for writing",
nfs_pidfile_path);
} else {
char linebuf[1024];
struct flock lk;
/* Try to obtain a lock on the file */
lk.l_type = F_WRLCK;
lk.l_whence = SEEK_SET;
lk.l_start = (off_t) 0;
lk.l_len = (off_t) 0;
if (fcntl(pidfile, F_SETLK, &lk) == -1)
LogFatal(COMPONENT_MAIN, "Ganesha already started");
/* Put pid into file, then close it */
(void)snprintf(linebuf, sizeof(linebuf), "%u\n", getpid());
if (write(pidfile, linebuf, strlen(linebuf)) == -1)
LogCrit(COMPONENT_MAIN, "Couldn't write pid to file %s",
nfs_pidfile_path);
}
/* Set up for the signal handler.
* Blocks the signals the signal handler will handle.
*/
sigemptyset(&signals_to_block);
sigaddset(&signals_to_block, SIGTERM);
sigaddset(&signals_to_block, SIGHUP);
sigaddset(&signals_to_block, SIGPIPE);
if (pthread_sigmask(SIG_BLOCK, &signals_to_block, NULL) != 0)
LogFatal(COMPONENT_MAIN,
"Could not start nfs daemon, pthread_sigmask failed");
/* init URL package */
config_url_init();
/* Create a memstream for parser+processing error messages */
if (!init_error_type(&err_type))
goto fatal_die;
/* Parse the configuration file so we all know what is going on. */
if (nfs_config_path == NULL || nfs_config_path[0] == '\0') {
LogWarn(COMPONENT_INIT,
"No configuration file named.");
nfs_config_struct = NULL;
} else
nfs_config_struct =
config_ParseFile(nfs_config_path, &err_type);
if (!config_error_no_error(&err_type)) {
char *errstr = err_type_str(&err_type);
if (!config_error_is_harmless(&err_type)) {
LogCrit(COMPONENT_INIT,
"Error %s while parsing (%s)",
errstr != NULL ? errstr : "unknown",
nfs_config_path);
if (errstr != NULL)
gsh_free(errstr);
goto fatal_die;
} else
LogWarn(COMPONENT_INIT,
"Error %s while parsing (%s)",
errstr != NULL ? errstr : "unknown",
nfs_config_path);
if (errstr != NULL)
gsh_free(errstr);
}
if (read_log_config(nfs_config_struct, &err_type) < 0) {
LogCrit(COMPONENT_INIT,
"Error while parsing log configuration");
goto fatal_die;
}
/* We need all the fsal modules loaded so we can have
* the list available at exports parsing time.
*/
start_fsals();
/* parse configuration file */
if (nfs_set_param_from_conf(nfs_config_struct,
&my_nfs_start_info,
&err_type)) {
LogCrit(COMPONENT_INIT,
"Error setting parameters from configuration file.");
goto fatal_die;
}
/* initialize core subsystems and data structures */
if (init_server_pkgs() != 0) {
LogCrit(COMPONENT_INIT,
"Failed to initialize server packages");
goto fatal_die;
}
/* Load Data Server entries from parsed file
* returns the number of DS entries.
*/
dsc = ReadDataServers(nfs_config_struct, &err_type);
if (dsc < 0) {
LogCrit(COMPONENT_INIT,
"Error while parsing DS entries");
goto fatal_die;
}
/* Create stable storage directory, this needs to be done before
* starting the recovery thread.
*/
rc = nfs4_recovery_init();
if (rc) {
LogCrit(COMPONENT_INIT,
"Recovery backend initialization failed!");
goto fatal_die;
}
/* Start grace period */
nfs_start_grace(NULL);
/* Wait for enforcement to begin */
nfs_wait_for_grace_enforcement();
/* Load export entries from parsed file
* returns the number of export entries.
*/
rc = ReadExports(nfs_config_struct, &err_type);
if (rc < 0) {
LogCrit(COMPONENT_INIT,
"Error while parsing export entries");
goto fatal_die;
}
if (rc == 0 && dsc == 0)
LogWarn(COMPONENT_INIT,
"No export entries found in configuration file !!!");
report_config_errors(&err_type, NULL, config_errs_to_log);
/* freeing syntax tree : */
config_Free(nfs_config_struct);
/* Everything seems to be OK! We can now start service threads */
nfs_start(&my_nfs_start_info);
return 0;
fatal_die:
report_config_errors(&err_type, NULL, config_errs_to_log);
LogFatal(COMPONENT_INIT,
"Fatal errors. Server exiting...");
/* NOT REACHED */
return 2;
}
