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minix/minix/commands/service/service.c
Cristiano Giuffrida fb6bd596bf rs: New RS. 
Change-Id: I46e335d5dac49104028d7cb0706b3e85de752bfe
2015-09-16 15:30:48 +00:00

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/* Utility to start or stop system services. Requests are sent to the
* reincarnation server that does the actual work.
*
* Changes:
* Nov 22, 2009: added basic live update support (Cristiano Giuffrida)
* Jul 22, 2005: Created (Jorrit N. Herder)
*/
#include <stdarg.h>
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <pwd.h>
#include <unistd.h>
#include <limits.h>
#include <lib.h>
#include <minix/config.h>
#include <minix/com.h>
#include <minix/const.h>
#include <minix/type.h>
#include <minix/ipc.h>
#include <minix/rs.h>
#include <minix/syslib.h>
#include <minix/sysinfo.h>
#include <minix/bitmap.h>
#include <minix/paths.h>
#include <minix/sef.h>
#include <minix/dmap.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <configfile.h>
#include <machine/archtypes.h>
#include <minix/timers.h>
#include <err.h>
#include "config.h"
#include "proto.h"
/* This array defines all known requests. */
static char *known_requests[] = {
"up",
"down",
"refresh",
"restart",
"shutdown",
"update",
"clone",
"unclone",
"edit",
"sysctl",
"catch for illegal requests"
};
static int known_request_types[] = {
RS_UP,
RS_DOWN,
RS_REFRESH,
RS_RESTART,
RS_SHUTDOWN,
RS_UPDATE,
RS_CLONE,
RS_UNCLONE,
RS_EDIT,
RS_SYSCTL,
0
};
#define ILLEGAL_REQUEST sizeof(known_requests)/sizeof(char *)
/* Global error number set for failed system calls. */
#define OK 0
#define RUN_CMD "run"
#define RUN_SCRIPT "/etc/rs.single" /* Default script for 'run' */
#define SELF_BINARY "self"
#define SELF_REQ_PATH "/dev/null"
#define PATH_CONFIG _PATH_SYSTEM_CONF /* Default config file */
#define DEFAULT_LU_STATE SEF_LU_STATE_WORK_FREE /* Default lu state */
#define DEFAULT_LU_MAXTIME 0 /* Default lu max time */
/* Define names for options provided to this utility. */
#define OPT_COPY "-c" /* copy executable image */
#define OPT_REUSE "-r" /* reuse executable image */
#define OPT_NOBLOCK "-n" /* unblock caller immediately */
#define OPT_REPLICA "-p" /* create replica for the service */
#define OPT_NO_BIN_EXP "-b" /* no binary exponential backoff */
#define OPT_BATCH "-q" /* batch mode */
#define OPT_ASR_LU "-a" /* asr update */
#define OPT_PREPARE_ONLY_LU "-o" /* prepare-only update */
#define OPT_FORCE_SELF_LU "-s" /* force self update */
#define OPT_FORCE_INIT_CRASH "-x" /* force init crash (for debugging) */
#define OPT_FORCE_INIT_FAIL "-y" /* force init failure (for debugging) */
#define OPT_FORCE_INIT_TIMEOUT "-z" /* force init timeout (for debugging) */
#define OPT_FORCE_INIT_DEFCB "-d" /* force init default callback */
#define OPT_UNSAFE_LU "-u" /* allow unsafe update */
#define OPT_NOMMAP_LU "-m" /* don't inherit mmaped regions */
#define OPT_DETACH "-e" /* detach on update/restart */
#define OPT_NORESTART "-f" /* don't restart */
#define OPT_FORCE_INIT_ST "-t" /* force init state transfer */
/* Define names for arguments provided to this utility. The first few
* arguments are required and have a known index. Thereafter, some optional
* argument pairs like "-args arglist" follow.
*/
#define ARG_NAME 0 /* own application name */
/* The following are relative to optind */
#define ARG_REQUEST 0 /* request to perform */
#define ARG_PATH 1 /* system service */
#define ARG_LABEL 1 /* name of system service */
#define ARG_SYSCTL_TYPE 1 /* sysctl action type */
#define MIN_ARG_COUNT 1 /* require an action */
#define ARG_ARGS "-args" /* list of arguments to be passed */
#define ARG_DEV "-dev" /* major device number for drivers */
#define ARG_MAJOR "-major" /* major number */
#define ARG_PERIOD "-period" /* heartbeat period in ticks */
#define ARG_SCRIPT "-script" /* name of the script to restart a
* system service
*/
#define ARG_LABELNAME "-label" /* custom label name */
#define ARG_CONFIG "-config" /* name of the file with the resource
* configuration
*/
#define ARG_LU_STATE "-state" /* the live update state required */
#define ARG_LU_MAXTIME "-maxtime" /* max time to prepare for the update */
#define ARG_DEVMANID "-devid" /* the id of the devman device this
driver should be able to access */
#define ARG_HEAP_PREALLOC "-heap-prealloc" /* preallocate heap regions */
#define ARG_MAP_PREALLOC "-map-prealloc" /* preallocate mmapped regions */
#define ARG_TRG_LABELNAME "-trg-label" /* target label name */
#define ARG_LU_IPC_BL "-ipc_bl" /* IPC blacklist filter */
#define ARG_LU_IPC_WL "-ipc_wl" /* IPC whitelist filter */
#define ARG_RESTARTS "-restarts" /* number of restarts */
/* The function parse_arguments() verifies and parses the command line
* parameters passed to this utility. Request parameters that are needed
* are stored globally in the following variables:
*/
static int req_type;
static int do_run= 0; /* 'run' command instead of 'up' */
static char *req_label = NULL;
static char *req_trg_label = NULL;
static char *req_path = NULL;
static char *req_path_self = SELF_REQ_PATH;
static char *req_args = "";
static int req_major = 0;
static int devman_id = 0;
static long req_period = 0;
static char *req_script = NULL;
static char *req_config = PATH_CONFIG;
static int custom_config_file = 0;
static int req_lu_state = DEFAULT_LU_STATE;
static int req_lu_maxtime = DEFAULT_LU_MAXTIME;
static int req_restarts = 0;
static long req_heap_prealloc = 0;
static long req_map_prealloc = 0;
static int req_sysctl_type = 0;
static struct rs_ipc_filter_el rs_ipc_filter_els[RS_MAX_IPC_FILTERS][IPCF_MAX_ELEMENTS];
static int num_ipc_filters = 0;
static char *req_state_eval = NULL;
/* Buffer to build "/command arg1 arg2 ..." string to pass to RS server. */
static char command[4096];
/* An error occurred. Report the problem, print the usage, and exit.
*/
static void print_usage(char *app_name, char *problem)
{
fprintf(stderr, "Warning, %s\n", problem);
fprintf(stderr, "Usage:\n");
fprintf(stderr,
" %s [%s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s] (up|run|edit|update) <binary|%s> [%s <args>] [%s <special>] [%s <major_nr>] [%s <dev_id>] [%s <ticks>] [%s <path>] [%s <name>] [%s <path>] [%s <state value|eval_expression>] [%s <time>] [%s <bytes>] [%s <bytes>] [%s <name>] [(%s|%s <src_label1,src_type1:src_label2,:,src_type3:...>)*] [%s <restarts>]\n",
app_name, OPT_COPY, OPT_REUSE, OPT_NOBLOCK, OPT_REPLICA, OPT_NO_BIN_EXP,
OPT_BATCH, OPT_ASR_LU, OPT_PREPARE_ONLY_LU, OPT_FORCE_SELF_LU,
OPT_FORCE_INIT_CRASH, OPT_FORCE_INIT_FAIL, OPT_FORCE_INIT_TIMEOUT,
OPT_FORCE_INIT_DEFCB, OPT_UNSAFE_LU, OPT_NOMMAP_LU, OPT_DETACH,
OPT_NORESTART, OPT_FORCE_INIT_ST, SELF_BINARY,
ARG_ARGS, ARG_DEV, ARG_MAJOR, ARG_DEVMANID, ARG_PERIOD,
ARG_SCRIPT, ARG_LABELNAME, ARG_CONFIG, ARG_LU_STATE, ARG_LU_MAXTIME,
ARG_HEAP_PREALLOC, ARG_MAP_PREALLOC, ARG_TRG_LABELNAME, ARG_LU_IPC_BL, ARG_LU_IPC_WL,
ARG_RESTARTS);
fprintf(stderr, " %s down <label>\n", app_name);
fprintf(stderr, " %s refresh <label>\n", app_name);
fprintf(stderr, " %s restart <label>\n", app_name);
fprintf(stderr, " %s clone <label>\n", app_name);
fprintf(stderr, " %s unclone <label>\n", app_name);
fprintf(stderr, " %s sysctl <srv_status|upd_start|upd_run|upd_stop|upd_status>\n", app_name);
fprintf(stderr, " %s shutdown\n", app_name);
fprintf(stderr, " Options:\n");
fprintf(stderr, " %s: copy executable image \n", OPT_COPY);
fprintf(stderr, " %s: reuse executable image \n", OPT_REUSE);
fprintf(stderr, " %s: unblock caller immediately \n", OPT_NOBLOCK);
fprintf(stderr, " %s: create replica for the service \n", OPT_REPLICA);
fprintf(stderr, " %s: batch mode \n", OPT_BATCH);
fprintf(stderr, " %s: asr update \n", OPT_ASR_LU);
fprintf(stderr, " %s: prepare-only update \n", OPT_PREPARE_ONLY_LU);
fprintf(stderr, " %s: force self update \n", OPT_FORCE_SELF_LU);
fprintf(stderr, " %s: force init crash (for debugging) \n", OPT_FORCE_INIT_CRASH);
fprintf(stderr, " %s: force init failure (for debugging)\n", OPT_FORCE_INIT_FAIL);
fprintf(stderr, " %s: force init timeout (for debugging)\n", OPT_FORCE_INIT_TIMEOUT);
fprintf(stderr, " %s: force init default callback \n", OPT_FORCE_INIT_DEFCB);
fprintf(stderr, " %s: allow unsafe update \n", OPT_UNSAFE_LU);
fprintf(stderr, " %s: don't inherit mmaped regions \n", OPT_NOMMAP_LU);
fprintf(stderr, " %s: detach on update/restart \n", OPT_DETACH);
fprintf(stderr, " %s: don't restart \n", OPT_NORESTART);
fprintf(stderr, " %s: force init state transfer \n", OPT_FORCE_INIT_ST);
fprintf(stderr, "\n");
}
/* A request to the RS server failed. Report and exit.
*/
static void failure(int request)
{
fprintf(stderr, "Request 0x%x to RS failed: %s (error %d)\n", request, strerror(errno), errno);
exit(errno);
}
static int parse_ipc_filter(char* str, int type_flag)
{
char *el_str, *label_str, *type_str;
char el_strings[IPCF_MAX_ELEMENTS][RS_MAX_IPCF_STR_LEN];
int i, num_els, label_len, type_len;
struct rs_ipc_filter_el *ipcf_el;
if(num_ipc_filters+1 > RS_MAX_IPC_FILTERS) {
return E2BIG;
}
el_str = (char*) strsep(&str,":");
num_els = 0;
while (el_str != NULL)
{
if(num_els >= IPCF_MAX_ELEMENTS) {
return E2BIG;
}
if(strlen(el_str)>=RS_MAX_IPCF_STR_LEN) {
return ENOMEM;
}
strcpy(el_strings[num_els], el_str);
el_str = (char*) strsep(&str, ":");
num_els++;
}
memset(rs_ipc_filter_els[num_ipc_filters],0,IPCF_MAX_ELEMENTS);
for(i=0;i<num_els;i++) {
el_str = el_strings[i];
ipcf_el = &rs_ipc_filter_els[num_ipc_filters][i];
label_str = (char*) strsep(&el_str,",");
type_str = (char*) strsep(&el_str,",");
if(!label_str || !type_str || strsep(&el_str,",")) {
return EINVAL;
}
label_len = strlen(label_str);
type_len = strlen(type_str);
ipcf_el->flags = 0;
if(label_len>0) {
if(label_len >= RS_MAX_LABEL_LEN) {
return ENOMEM;
}
strcpy(ipcf_el->m_label, label_str);
ipcf_el->flags |= IPCF_MATCH_M_SOURCE;
}
if(type_len>0) {
char *buff;
errno=0;
ipcf_el->m_type = strtol(type_str, &buff, 10);
if(errno || strcmp(buff, "")) {
return EINVAL;
}
ipcf_el->flags |= IPCF_MATCH_M_TYPE;
}
if(ipcf_el->flags == 0) {
return EINVAL;
}
ipcf_el->flags |= type_flag;
}
num_ipc_filters++;
return OK;
}
/* Parse and verify correctness of arguments. Report problem and exit if an
* error is found. Store needed parameters in global variables.
*/
static int parse_arguments(int argc, char **argv, u32_t *rss_flags)
{
struct stat stat_buf;
char *hz, *buff;
int req_nr;
int c, i, j, r;
int b_flag, c_flag, r_flag, n_flag, p_flag, q_flag,
a_flag, o_flag, s_flag, x_flag, y_flag,
z_flag, d_flag, u_flag, m_flag, e_flag,
f_flag, t_flag;
int label_required;
b_flag = 0;
c_flag = 0;
r_flag = 0;
n_flag = 0;
p_flag = 0;
q_flag = 0;
a_flag = 0;
o_flag = 0;
s_flag = 0;
x_flag = 0;
y_flag = 0;
z_flag = 0;
d_flag = 0;
u_flag = 0;
m_flag = 0;
e_flag = 0;
f_flag = 0;
t_flag = 0;
while (c= getopt(argc, argv, "rbcnpqaosxyzdumeft?"), c != -1)
{
switch(c)
{
case '?':
print_usage(argv[ARG_NAME], "wrong number of arguments");
exit(EINVAL);
case 'b':
b_flag = 1;
break;
case 'c':
c_flag = 1;
break;
case 'r':
c_flag = 1; /* -r implies -c */
r_flag = 1;
break;
case 'n':
n_flag = 1;
break;
case 'p':
p_flag = 1;
break;
case 'q':
q_flag = 1;
break;
case 'a':
a_flag = 1;
break;
case 'o':
o_flag = 1;
break;
case 's':
s_flag = 1;
break;
case 'x':
x_flag = 1;
break;
case 'y':
y_flag = 1;
break;
case 'z':
z_flag = 1;
break;
case 'd':
d_flag = 1;
break;
case 'u':
u_flag = 1;
break;
case 'm':
m_flag = 1;
break;
case 'e':
e_flag = 1;
break;
case 'f':
f_flag = 1;
break;
case 't':
t_flag = 1;
break;
default:
fprintf(stderr, "%s: getopt failed: %c\n",
argv[ARG_NAME], c);
exit(1);
}
}
/* Verify argument count. */
if (argc < optind+MIN_ARG_COUNT) {
print_usage(argv[ARG_NAME], "wrong number of arguments");
exit(EINVAL);
}
if (strcmp(argv[optind+ARG_REQUEST], RUN_CMD) == 0)
{
req_nr= RS_UP;
do_run= TRUE;
}
else
{
/* Verify request type. */
for (req_type=0; req_type< ILLEGAL_REQUEST; req_type++) {
if (strcmp(known_requests[req_type],argv[optind+ARG_REQUEST])==0)
break;
}
if (req_type == ILLEGAL_REQUEST) {
print_usage(argv[ARG_NAME], "illegal request type");
exit(ENOSYS);
}
req_nr = known_request_types[req_type];
}
*rss_flags = 0;
if (req_nr == RS_UP || req_nr == RS_UPDATE || req_nr == RS_EDIT) {
u32_t system_hz;
if (c_flag)
*rss_flags |= RSS_COPY;
if(r_flag)
*rss_flags |= RSS_REUSE;
if(n_flag)
*rss_flags |= RSS_NOBLOCK;
if(p_flag)
*rss_flags |= RSS_REPLICA;
if(b_flag)
*rss_flags |= RSS_NO_BIN_EXP;
if(q_flag)
*rss_flags |= RSS_BATCH;
if(a_flag)
*rss_flags |= RSS_ASR_LU;
if(s_flag)
*rss_flags |= RSS_FORCE_SELF_LU;
if(o_flag)
*rss_flags |= RSS_PREPARE_ONLY_LU;
if(x_flag)
*rss_flags |= RSS_FORCE_INIT_CRASH;
if(y_flag)
*rss_flags |= RSS_FORCE_INIT_FAIL;
if(z_flag)
*rss_flags |= RSS_FORCE_INIT_TIMEOUT;
if(d_flag)
*rss_flags |= RSS_FORCE_INIT_DEFCB;
if(u_flag)
*rss_flags |= RSS_UNSAFE_LU;
if(m_flag)
*rss_flags |= RSS_NOMMAP_LU;
if(e_flag)
*rss_flags |= RSS_DETACH;
if(f_flag)
*rss_flags |= RSS_NORESTART;
if(t_flag)
*rss_flags |= RSS_FORCE_INIT_ST;
/* Verify argument count. */
if (argc - 1 < optind+ARG_PATH) {
print_usage(argv[ARG_NAME], "action requires a binary to start");
exit(EINVAL);
}
if(req_nr != RS_UPDATE && q_flag) {
print_usage(argv[ARG_NAME], "action does not support batch mode");
exit(EINVAL);
}
req_path = argv[optind+ARG_PATH];
if(req_nr == RS_UPDATE && !strcmp(req_path, SELF_BINARY)) {
/* Self update needs no real path or configuration file. */
req_config = NULL;
req_path = req_path_self;
*rss_flags |= RSS_SELF_LU;
}
if (do_run)
{
/* Set default recovery script for RUN */
req_script = RUN_SCRIPT;
}
/* Verify the name of the binary of the system service. */
if(!(*rss_flags & RSS_SELF_LU)) {
if (req_path[0] != '/') {
print_usage(argv[ARG_NAME], "binary should be absolute path");
exit(EINVAL);
}
if (stat(req_path, &stat_buf) == -1) {
perror(req_path);
fprintf(stderr, "%s: couldn't get stat binary\n", argv[ARG_NAME]);
exit(errno);
}
if (! (stat_buf.st_mode & S_IFREG)) {
print_usage(argv[ARG_NAME], "binary is not a regular file");
exit(EINVAL);
}
}
/* Get HZ. */
system_hz = (u32_t) sysconf(_SC_CLK_TCK);
/* Check optional arguments that come in pairs like "-args arglist". */
for (i=optind+MIN_ARG_COUNT+1; i<argc; i=i+2) {
if (! (i+1 < argc)) {
print_usage(argv[ARG_NAME], "optional argument not complete");
exit(EINVAL);
}
if (strcmp(argv[i], ARG_ARGS)==0) {
req_args = argv[i+1];
}
else if (strcmp(argv[i], ARG_PERIOD)==0) {
req_period = strtol(argv[i+1], &hz, 10);
if (strcmp(hz,"HZ")==0) req_period *= system_hz;
if (req_period < 0) {
print_usage(argv[ARG_NAME], "bad period argument");
exit(EINVAL);
}
}
else if (strcmp(argv[i], ARG_DEV)==0) {
if (stat(argv[i+1], &stat_buf) == -1) {
perror(argv[i+1]);
print_usage(argv[ARG_NAME], "couldn't get status of device");
exit(errno);
}
if ( ! (stat_buf.st_mode & (S_IFBLK | S_IFCHR))) {
print_usage(argv[ARG_NAME], "special file is not a device");
exit(EINVAL);
}
if (req_major != 0) {
print_usage(argv[ARG_NAME], "major already set");
exit(EINVAL);
}
req_major = major(stat_buf.st_rdev);
}
else if (strcmp(argv[i], ARG_MAJOR)==0) {
if (req_major != 0) {
print_usage(argv[ARG_NAME], "major already set");
exit(EINVAL);
}
if (i+1 < argc) {
req_major = atoi(argv[i+1]);
} else {
exit(EINVAL);
}
}
else if (strcmp(argv[i], ARG_SCRIPT)==0) {
req_script = argv[i+1];
}
else if (strcmp(argv[i], ARG_LABELNAME)==0) {
req_label = argv[i+1];
}
else if (strcmp(argv[i], ARG_TRG_LABELNAME)==0) {
req_trg_label = argv[i+1];
}
else if (strcmp(argv[i], ARG_CONFIG)==0) {
req_config = argv[i+1];
custom_config_file = 1;
}
else if (strcmp(argv[i], ARG_LU_STATE)==0) {
errno=0;
req_lu_state = strtol(argv[i+1], &buff, 10);
if(errno || strcmp(buff, "")) {
/* State is not a number, assume it's an eval expression. */
req_lu_state = SEF_LU_STATE_EVAL;
req_state_eval = argv[i+1];
}
else if(req_lu_state == SEF_LU_STATE_NULL) {
print_usage(argv[ARG_NAME], "null live update state");
exit(EINVAL);
}
}
else if (strcmp(argv[i], ARG_LU_MAXTIME)==0) {
errno=0;
req_lu_maxtime = strtol(argv[i+1], &hz, 10);
if(errno || (strcmp(hz, "") && strcmp(hz, "HZ"))
|| req_lu_maxtime<0) {
print_usage(argv[ARG_NAME],
"bad live update max time");
exit(EINVAL);
}
if(req_lu_maxtime == 0) {
/* no timeout requested. */
req_lu_maxtime = -1;
}
else if (strcmp(hz,"HZ")==0) req_lu_maxtime *= system_hz;
}
else if (strcmp(argv[i], ARG_DEVMANID) == 0) {
if (i+1 < argc) {
devman_id = atoi(argv[i+1]);
} else {
exit(EINVAL);
}
}
else if (strcmp(argv[i], ARG_HEAP_PREALLOC)==0) {
errno=0;
req_heap_prealloc = strtol(argv[i+1], &buff, 10);
if(errno || strcmp(buff, "") || req_heap_prealloc <= 0) {
print_usage(argv[ARG_NAME], "bad heap prealloc bytes");
exit(EINVAL);
}
}
else if (strcmp(argv[i], ARG_MAP_PREALLOC)==0) {
errno=0;
req_map_prealloc = strtol(argv[i+1], &buff, 10);
if(errno || strcmp(buff, "") || req_map_prealloc <= 0) {
print_usage(argv[ARG_NAME], "bad heap prealloc bytes");
exit(EINVAL);
}
}
else if (strcmp(argv[i], ARG_LU_IPC_BL)==0) {
if((r=parse_ipc_filter(argv[i+1], IPCF_EL_BLACKLIST)) != OK) {
print_usage(argv[ARG_NAME], "bad IPC blacklist filter");
exit(r);
}
}
else if (strcmp(argv[i], ARG_LU_IPC_WL)==0) {
if((r=parse_ipc_filter(argv[i+1], IPCF_EL_WHITELIST)) != OK) {
print_usage(argv[ARG_NAME], "bad IPC whitelist filter");
exit(r);
}
}
else if (strcmp(argv[i], ARG_RESTARTS)==0) {
errno=0;
req_restarts = strtol(argv[i+1], &buff, 10);
if(errno || strcmp(buff, "") || req_restarts<0) {
print_usage(argv[ARG_NAME], "bad number of restarts");
exit(EINVAL);
}
}
else {
print_usage(argv[ARG_NAME], "unknown optional argument given");
exit(EINVAL);
}
}
}
else if (req_nr == RS_DOWN || req_nr == RS_REFRESH || req_nr == RS_RESTART
|| req_nr == RS_CLONE || req_nr == RS_UNCLONE) {
/* Verify argument count. */
if (argc - 1 < optind+ARG_LABEL) {
print_usage(argv[ARG_NAME], "action requires a target label");
exit(EINVAL);
}
req_label= argv[optind+ARG_LABEL];
}
else if (req_nr == RS_SYSCTL) {
char* sysctl_types[] = { "srv_status", "upd_start", "upd_run", "upd_stop",
"upd_status", NULL };
char* sysctl_type;
int sysctl_type_values[] = { RS_SYSCTL_SRV_STATUS, RS_SYSCTL_UPD_START,
RS_SYSCTL_UPD_RUN, RS_SYSCTL_UPD_STOP, RS_SYSCTL_UPD_STATUS };
/* Verify argument count. */
if (argc - 1 < optind+ARG_SYSCTL_TYPE) {
print_usage(argv[ARG_NAME], "sysctl requires an action type");
exit(EINVAL);
}
sysctl_type = argv[optind+ARG_SYSCTL_TYPE];
for(i=0;sysctl_types[i]!=NULL;i++) {
if(!strcmp(sysctl_types[i], sysctl_type)) {
break;
}
}
if(sysctl_types[i] == NULL) {
print_usage(argv[ARG_NAME], "bad sysctl type");
exit(EINVAL);
}
req_sysctl_type = sysctl_type_values[i];
}
else if (req_nr == RS_SHUTDOWN) {
/* no extra arguments required */
}
label_required = (*rss_flags & RSS_SELF_LU) || (req_nr == RS_EDIT);
if(label_required && !req_label) {
print_usage(argv[ARG_NAME], "label option mandatory for target action");
exit(EINVAL);
}
/* Return the request number if no error were found. */
return(req_nr);
}
/* Main program.
*/
int main(int argc, char **argv)
{
message m;
int result = EXIT_SUCCESS;
int request;
char *progname = NULL;
/* Arguments for RS to start a new service */
struct rs_config config;
u32_t rss_flags = 0;
/* Verify and parse the command line arguments. All arguments are checked
* here. If an error occurs, the problem is reported and exit(2) is called.
* all needed parameters to perform the request are extracted and stored
* global variables.
*/
request = parse_arguments(argc, argv, &rss_flags);
/* Arguments seem fine. Try to perform the request. Only valid requests
* should end up here. The default is used for not yet supported requests.
*/
result = OK;
memset(&m, 0, sizeof(m));
switch(request) {
case RS_UPDATE:
m.m_rs_update.state = req_lu_state;
m.m_rs_update.prepare_maxtime = req_lu_maxtime;
/* fall through */
case RS_UP:
case RS_EDIT:
/* Build space-separated command string to be passed to RS server. */
progname = strrchr(req_path, '/');
assert(progname); /* an absolute path was required */
progname++; /* skip last slash */
strcpy(command, req_path);
command[strlen(req_path)] = ' ';
strcpy(command+strlen(req_path)+1, req_args);
if (req_config) {
assert(progname);
memset(&config, 0, sizeof(config));
if(!parse_config(progname, custom_config_file, req_config, &config))
errx(1, "couldn't parse config");
assert(config.rs_start.rss_priority < NR_SCHED_QUEUES);
assert(config.rs_start.rss_quantum > 0);
}
/* Set specifics */
config.rs_start.rss_cmd= command;
config.rs_start.rss_cmdlen= strlen(command);
config.rs_start.rss_major= req_major;
config.rs_start.rss_period= req_period;
config.rs_start.rss_script= req_script;
config.rs_start.rss_restarts= req_restarts;
config.rs_start.devman_id= devman_id;
config.rs_start.rss_heap_prealloc_bytes= req_heap_prealloc;
config.rs_start.rss_map_prealloc_bytes= req_map_prealloc;
config.rs_start.rss_flags |= rss_flags;
if(req_label) {
config.rs_start.rss_label.l_addr = req_label;
config.rs_start.rss_label.l_len = strlen(req_label);
} else {
config.rs_start.rss_label.l_addr = progname;
config.rs_start.rss_label.l_len = strlen(progname);
}
if(req_trg_label) {
config.rs_start.rss_trg_label.l_addr = req_trg_label;
config.rs_start.rss_trg_label.l_len = strlen(req_trg_label);
} else {
config.rs_start.rss_trg_label.l_addr = 0;
config.rs_start.rss_trg_label.l_len = 0;
}
if (req_script)
config.rs_start.rss_scriptlen= strlen(req_script);
else
config.rs_start.rss_scriptlen= 0;
/* State-related data. */
config.rs_start.rss_state_data.size =
sizeof(config.rs_start.rss_state_data);
if(num_ipc_filters > 0) {
config.rs_start.rss_state_data.ipcf_els = rs_ipc_filter_els;
config.rs_start.rss_state_data.ipcf_els_size =
num_ipc_filters*sizeof(rs_ipc_filter_els[0]);
}
else {
config.rs_start.rss_state_data.ipcf_els = NULL;
config.rs_start.rss_state_data.ipcf_els_size = 0;
}
if(req_state_eval) {
config.rs_start.rss_state_data.eval_addr = req_state_eval;
config.rs_start.rss_state_data.eval_len = strlen(req_state_eval);
}
else {
config.rs_start.rss_state_data.eval_addr = NULL;
config.rs_start.rss_state_data.eval_len = 0;
}
m.m_rs_req.addr = (char *) &config.rs_start;
break;
case RS_DOWN:
case RS_REFRESH:
case RS_RESTART:
case RS_CLONE:
case RS_UNCLONE:
m.m_rs_req.addr = req_label;
m.m_rs_req.len = strlen(req_label);
break;
case RS_SYSCTL:
m.m_rs_req.subtype = req_sysctl_type;
break;
case RS_SHUTDOWN:
break;
default:
print_usage(argv[ARG_NAME], "request is not yet supported");
result = EGENERIC;
}
/* Build request message and send the request. */
if(result == OK) {
if (_syscall(RS_PROC_NR, request, &m) == -1)
failure(request);
result = m.m_type;
}
return(result);
}
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