#include "platform.h"
#include "gnunet_util_lib.h"
-#include "gnunet_resolver_service.h"
-#include <mpi.h>
+#include "gnunet_testbed_service.h"
+
/**
* Generic logging shorthand
*/
-#define LOG(kind,...) \
- GNUNET_log_from (kind, "gnunet-mpi-test", __VA_ARGS__)
+#define LOG(kind,...) \
+ GNUNET_log (kind, __VA_ARGS__)
/**
* Debug logging shorthand
LOG (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
/**
- * Timeout for resolving IPs
+ * Global result
*/
-#define RESOLVE_TIMEOUT \
- GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30)
+static int ret;
/**
- * Log an error message at log-level 'level' that indicates
- * a failure of the command 'cmd' with the message given
- * by gcry_strerror(rc).
+ * The child process we spawn
*/
-#define LOG_GAI(level, cmd, rc) do { LOG(level, _("`%s' failed at %s:%d with error: %s\n"), cmd, __FILE__, __LINE__, gai_strerror(rc)); } while(0)
+static struct GNUNET_OS_Process *child;
/**
- * Global result
+ * The arguments including the binary to spawn
*/
-static int ret;
+static char **argv2;
/**
- * The array of hostnames
+ * Pipe used to communicate shutdown via signal.
*/
-static char **hostnames;
+static struct GNUNET_DISK_PipeHandle *sigpipe;
/**
- * The array of host's addresses
+ * Filename of the unique file
*/
-static char **hostaddrs;
+static char *fn;
/**
- * The resolution request handles; one per each hostname resolution
+ * Handle to the unique file
*/
-struct GNUNET_RESOLVER_RequestHandle **rhs;
+static int fh;
/**
- * Number of hosts in the hostname array
+ * The return code of the binary
*/
-static unsigned int nhosts;
+static unsigned long child_exit_code;
/**
- * Number of addresses in the hostaddr array
+ * The process status of the child
*/
-static unsigned int nhostaddrs;
+static enum GNUNET_OS_ProcessStatusType child_status;
/**
- * Did we connect to the resolver service
+ * The shutdown task
*/
-static unsigned int resolver_connected;
+static GNUNET_SCHEDULER_TaskIdentifier shutdown_task_id;
/**
- * Task for resolving ips
+ * Task to kill the child
*/
-static GNUNET_SCHEDULER_TaskIdentifier resolve_task_id;
+static GNUNET_SCHEDULER_TaskIdentifier terminate_task_id;
+/**
+ * Task to kill the child
+ */
+static GNUNET_SCHEDULER_TaskIdentifier child_death_task_id;
/**
- * Resolves the hostnames array
- *
- * @param cls NULL
- * @param tc the scheduler task context
+ * The shutdown task
*/
static void
-resolve_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct addrinfo hint;
- const struct sockaddr_in *in_addr;
- struct addrinfo *res;
- char *hostip;
- unsigned int host;
- unsigned int rc;
-
- resolve_task_id = GNUNET_SCHEDULER_NO_TASK;
- hint.ai_family = AF_INET; /* IPv4 */
- hint.ai_socktype = 0;
- hint.ai_protocol = 0;
- hint.ai_addrlen = 0;
- hint.ai_addr = NULL;
- hint.ai_canonname = NULL;
- hint.ai_next = NULL;
- hint.ai_flags = AI_NUMERICSERV;
- for (host = 0; host < nhosts; host++)
+ shutdown_task_id = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != child_exit_code)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING, "Child exited with error code: %lu\n",
+ child_exit_code);
+ ret = 128 + (int) child_exit_code;
+ }
+ if (0 != fh)
+ {
+ close (fh);
+ }
+ if ((NULL != fn) && (0 != unlink (fn)))
+ {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "open");
+ ret = GNUNET_SYSERR;
+ }
+}
+
+
+static void
+terminate_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ static int hard_kill;
+
+ GNUNET_assert (NULL != child);
+ terminate_task_id =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
+ &terminate_task, NULL);
+ if (0 != hard_kill)
{
- res = NULL;
- LOG_DEBUG ("Resolving: %s host\n", hostnames[host]);
- if (0 != (rc = getaddrinfo (hostnames[host], "22", &hint, &res)))
+ switch (hard_kill)
{
- LOG_GAI (GNUNET_ERROR_TYPE_ERROR, "getaddrinfo", rc);
- ret = GNUNET_SYSERR;
+ case 1:
+ case 2:
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "%d more interrupts needed to send SIGKILL to the child\n",
+ 3 - hard_kill);
+ hard_kill++;
+ return;
+ case 3:
+ GNUNET_break (0 == GNUNET_OS_process_kill (child, SIGKILL));
return;
}
- GNUNET_assert (NULL != res);
- GNUNET_assert (NULL != res->ai_addr);
- GNUNET_assert (sizeof (struct sockaddr_in) == res->ai_addrlen);
- in_addr = (const struct sockaddr_in *) res->ai_addr;
- hostip = inet_ntoa (in_addr->sin_addr);
- GNUNET_assert (NULL != hostip);
- GNUNET_array_append (hostaddrs, nhostaddrs, GNUNET_strdup (hostip));
- LOG_DEBUG ("%s --> %s\n", hostnames[host], hostaddrs[host]);
- freeaddrinfo (res);
}
- ret = GNUNET_OK;
+ hard_kill++;
+ GNUNET_break (0 == GNUNET_OS_process_kill (child, GNUNET_TERM_SIG));
+ LOG (GNUNET_ERROR_TYPE_INFO, _("Waiting for child to exit.\n"));
}
/**
- * Loads the set of host allocated by the LoadLeveler Job Scheduler. This
- * function is only available when compiled with support for LoadLeveler and is
- * used for running on the SuperMUC
+ * Task triggered whenever we receive a SIGCHLD (child
+ * process died).
*
- * @param hostlist set to the hosts found in the file; caller must free this if
- * number of hosts returned is greater than 0
- * @return number of hosts returned in 'hosts', 0 on error
+ * @param cls closure, NULL if we need to self-restart
+ * @param tc context
*/
-unsigned int
-get_loadleveler_hosts ()
+static void
+child_death_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- const char *hostfile;
- char *buf;
- char *hostname;
- struct addrinfo *ret;
- struct addrinfo hint;
- ssize_t rsize;
- uint64_t size;
- uint64_t offset;
- enum {
- SCAN,
- SKIP,
- TRIM,
- READHOST
- } pstep;
- unsigned int host;
+ const struct GNUNET_DISK_FileHandle *pr;
+ char c[16];
- if (NULL == (hostfile = getenv ("MP_SAVEHOSTFILE")))
- {
- GNUNET_break (0);
- return 0;
- }
- if (GNUNET_SYSERR == GNUNET_DISK_file_size (hostfile, &size, GNUNET_YES,
- GNUNET_YES))
+ pr = GNUNET_DISK_pipe_handle (sigpipe, GNUNET_DISK_PIPE_END_READ);
+ child_death_task_id = GNUNET_SCHEDULER_NO_TASK;
+ if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
{
- GNUNET_break (0);
- return 0;
- }
- if (0 == size)
- {
- GNUNET_break (0);
- return 0;
- }
- buf = GNUNET_malloc (size + 1);
- rsize = GNUNET_DISK_fn_read (hostfile, buf, (size_t) size);
- if ( (GNUNET_SYSERR == rsize) || ((ssize_t) size != rsize) )
- {
- GNUNET_free (buf);
- GNUNET_break (0);
- return 0;
- }
- size++;
- offset = 0;
- pstep = SCAN;
- hostname = NULL;
- while (offset < size)
- {
- switch (pstep)
- {
- case SCAN:
- if ('!' == buf[offset])
- pstep = SKIP;
- else
- pstep = TRIM;
- break;
- case SKIP:
- if ('\n' == buf[offset])
- pstep = SCAN;
- break;
- case TRIM:
- if ('!' == buf[offset])
- {
- pstep = SKIP;
- break;
- }
- if ( (' ' == buf[offset])
- || ('\t' == buf[offset])
- || ('\r' == buf[offset]) )
- pstep = TRIM;
- else
- {
- pstep = READHOST;
- hostname = &buf[offset];
- }
- break;
- case READHOST:
- if (isspace (buf[offset]))
- {
- buf[offset] = '\0';
- for (host = 0; host < nhosts; host++)
- if (0 == strcmp (hostnames[host], hostname))
- break;
- if (host == nhosts)
- {
- LOG_DEBUG ("Adding host: %s\n", hostname);
- hostname = GNUNET_strdup (hostname);
- GNUNET_array_append (hostnames, nhosts, hostname);
- }
- else
- LOG_DEBUG ("Not adding host %s as it is already included\n", hostname);
- hostname = NULL;
- pstep = SCAN;
- }
- break;
- }
- offset++;
+ child_death_task_id =
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ pr, &child_death_task, NULL);
+ return;
}
- GNUNET_free_non_null (buf);
- return nhosts;
+ /* consume the signal */
+ GNUNET_break (0 < GNUNET_DISK_file_read (pr, &c, sizeof (c)));
+ LOG_DEBUG ("Child died\n");
+ GNUNET_SCHEDULER_cancel (terminate_task_id);
+ terminate_task_id = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_assert (GNUNET_OK == GNUNET_OS_process_status (child, &child_status,
+ &child_exit_code));
+ GNUNET_OS_process_destroy (child);
+ child = NULL;
+ shutdown_task_id = GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
+}
+
+
+static void
+destroy_hosts(struct GNUNET_TESTBED_Host **hosts, unsigned int nhosts)
+{
+ unsigned int host;
+
+ GNUNET_assert (NULL != hosts);
+ for (host = 0; host < nhosts; host++)
+ if (NULL != hosts[host])
+ GNUNET_TESTBED_host_destroy (hosts[host]);
+ GNUNET_free (hosts);
+ hosts = NULL;
}
/**
- * Main function that will be run by the scheduler.
+ * The main scheduler run task
*
- * @param cls closure
- * @param args remaining command-line arguments
- * @param cfgfile name of the configuration file used (for saving, can be NULL!)
- * @param config configuration
+ * @param cls NULL
+ * @param tc scheduler task context
*/
static void
-run (void *cls, char *const *args, const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *config)
+run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct GNUNET_OS_Process *proc;
- unsigned long code;
- enum GNUNET_OS_ProcessStatusType proc_status;
- int rank;
- int msg_size;
-
- if (MPI_SUCCESS != MPI_Comm_rank (MPI_COMM_WORLD, &rank))
+ struct GNUNET_TESTBED_Host **hosts;
+ const struct GNUNET_CONFIGURATION_Handle *null_cfg;
+ char *tmpdir;
+ char *hostname;
+ size_t hostname_len;
+ unsigned int nhosts;
+
+ null_cfg = GNUNET_CONFIGURATION_create ();
+ nhosts = GNUNET_TESTBED_hosts_load_from_loadleveler (null_cfg, &hosts);
+ if (0 == nhosts)
{
GNUNET_break (0);
+ ret = GNUNET_SYSERR;
return;
}
- if (0 != rank)
+ hostname_len = GNUNET_OS_get_hostname_max_length ();
+ hostname = GNUNET_malloc (hostname_len);
+ if (0 != gethostname (hostname, hostname_len))
{
- ret = GNUNET_OK;
+ LOG (GNUNET_ERROR_TYPE_ERROR, "Cannot get hostname. Exiting\n");
+ GNUNET_free (hostname);
+ destroy_hosts (hosts, nhosts);
+ ret = GNUNET_SYSERR;
return;
}
- PRINTF ("Spawning process\n");
- proc =
- GNUNET_OS_start_process_vap (GNUNET_NO, GNUNET_OS_INHERIT_STD_ALL, NULL,
- NULL, args[0], args);
- if (NULL == proc)
+ if (NULL == strstr (GNUNET_TESTBED_host_get_hostname (hosts[0]), hostname))
{
- printf ("Cannot exec\n");
+ LOG_DEBUG ("Exiting as `%s' is not the lowest host\n", hostname);
+ GNUNET_free (hostname);
+ ret = GNUNET_OK;
return;
}
- do
- {
- (void) sleep (1);
- ret = GNUNET_OS_process_status (proc, &proc_status, &code);
- }
- while (GNUNET_NO == ret);
- GNUNET_assert (GNUNET_NO != ret);
- if (GNUNET_OK == ret)
+ LOG_DEBUG ("Will be executing `%s' on host `%s'\n", argv2[0], hostname);
+ GNUNET_free (hostname);
+ destroy_hosts (hosts, nhosts);
+ tmpdir = getenv ("TMPDIR");
+ if (NULL == tmpdir)
+ tmpdir = getenv ("TMP");
+ if (NULL == tmpdir)
+ tmpdir = getenv ("TEMP");
+ if (NULL == tmpdir)
+ tmpdir = "/tmp";
+ (void) GNUNET_asprintf (&fn, "%s/gnunet-testbed-spawn.lock", tmpdir);
+ /* Open the unique file; we can create it then we can spawn the child process
+ else we exit */
+ fh = open (fn, O_CREAT | O_EXCL | O_CLOEXEC,
+ S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
+ if (-1 == fh)
{
- if (0 != code)
+ if (EEXIST == errno)
{
- LOG (GNUNET_ERROR_TYPE_WARNING, "Child terminated abnormally\n");
- ret = GNUNET_SYSERR;
- GNUNET_break (0);
+ LOG_DEBUG ("Lock file already created by other process. Exiting\n");
+ ret = GNUNET_OK;
return;
}
- }
- else
- {
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "open");
ret = GNUNET_SYSERR;
- GNUNET_break (0);
return;
}
- if (0 == get_loadleveler_hosts())
+ /* Spawn the new process here */
+ LOG (GNUNET_ERROR_TYPE_INFO, _("Spawning process `%s'\n"), argv2[0]);
+ child = GNUNET_OS_start_process_vap (GNUNET_NO, GNUNET_OS_INHERIT_STD_ALL, NULL,
+ NULL, NULL,
+ argv2[0], argv2);
+ if (NULL == child)
{
GNUNET_break (0);
ret = GNUNET_SYSERR;
+ shutdown_task_id = GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
return;
}
- resolve_task_id = GNUNET_SCHEDULER_add_now (&resolve_task, NULL);
+ ret = GNUNET_OK;
+ terminate_task_id =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
+ &terminate_task, NULL);
+ child_death_task_id =
+ GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_DISK_pipe_handle (sigpipe,
+ GNUNET_DISK_PIPE_END_READ),
+ &child_death_task, NULL);
+}
+
+
+/**
+ * Signal handler called for SIGCHLD.
+ */
+static void
+sighandler_child_death ()
+{
+ static char c;
+ int old_errno = errno; /* back-up errno */
+
+ GNUNET_break (1 ==
+ GNUNET_DISK_file_write (GNUNET_DISK_pipe_handle
+ (sigpipe, GNUNET_DISK_PIPE_END_WRITE),
+ &c, sizeof (c)));
+ errno = old_errno; /* restore errno */
}
int
main (int argc, char *argv[])
{
- static const struct GNUNET_GETOPT_CommandLineOption options[] = {
- GNUNET_GETOPT_OPTION_END
- };
- unsigned int host;
- int rres;
-
- ret = GNUNET_SYSERR;
+ struct GNUNET_SIGNAL_Context *shc_chld;
+ unsigned int cnt;
+
+ ret = -1;
if (argc < 2)
{
printf ("Need arguments: gnunet-testbed-mpi-spawn <cmd> <cmd_args>");
return 1;
}
- if (MPI_SUCCESS != MPI_Init (&argc, &argv))
+ if (GNUNET_OK != GNUNET_log_setup ("gnunet-testbed-spawn", NULL, NULL))
{
GNUNET_break (0);
return 1;
}
- rres =
- GNUNET_PROGRAM_run (argc, argv,
- "gnunet-testbed-mpi-spawn <cmd> <cmd_args>",
- _("Spawns cmd after starting my the MPI run-time"),
- options, &run, NULL);
- (void) MPI_Finalize ();
- for (host = 0; host < nhosts; host++)
- GNUNET_free (hostnames[host]);
- for (host = 0; host < nhostaddrs; host++)
- GNUNET_free (hostaddrs[host]);
- GNUNET_free_non_null (hostnames);
- GNUNET_free_non_null (hostaddrs);
- if ((GNUNET_OK == rres) && (GNUNET_OK == ret))
- return 0;
- printf ("Something went wrong\n");
- return 1;
+ if (NULL == (sigpipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO,
+ GNUNET_NO, GNUNET_NO)))
+ {
+ GNUNET_break (0);
+ ret = GNUNET_SYSERR;
+ return 1;
+ }
+ shc_chld =
+ GNUNET_SIGNAL_handler_install (GNUNET_SIGCHLD, &sighandler_child_death);
+ if (NULL == shc_chld)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR, "Cannot install a signal handler\n");
+ return 1;
+ }
+ argv2 = GNUNET_malloc (sizeof (char *) * argc);
+ for (cnt = 1; cnt < argc; cnt++)
+ argv2[cnt - 1] = argv[cnt];
+ GNUNET_SCHEDULER_run (run, NULL);
+ GNUNET_free (argv2);
+ GNUNET_SIGNAL_handler_uninstall (shc_chld);
+ shc_chld = NULL;
+ GNUNET_DISK_pipe_close (sigpipe);
+ GNUNET_free_non_null (fn);
+ if (GNUNET_OK != ret)
+ return ret;
+ return 0;
}
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