int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
const char *url = NULL;
struct iscsi_url *iscsi_url = NULL;
int show_help = 0, show_usage = 0, debug = 0;
int c;
int ret = 0;
int swp = 0;
struct scsi_task *sense_task = NULL;
struct scsi_task *select_task = NULL;
struct scsi_mode_sense *ms;
struct scsi_mode_page *mp;
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"usage", no_argument, NULL, 'u'},
{"debug", no_argument, NULL, 'd'},
{"initiator-name", required_argument, NULL, 'i'},
{"swp", required_argument, NULL, 's'},
{0, 0, 0, 0}
};
int option_index;
while ((c = getopt_long(argc, argv, "h?udi:s:", long_options,
&option_index)) != -1) {
switch (c) {
case 'h':
case '?':
show_help = 1;
break;
case 'u':
show_usage = 1;
break;
case 'd':
debug = 1;
break;
case 'i':
initiator = optarg;
break;
case 's':
if (!strcmp(optarg, "on") || !strcmp(optarg, "ON")) {
swp = 1;
}
if (!strcmp(optarg, "off") || !strcmp(optarg, "OFF")) {
swp = 2;
}
break;
default:
fprintf(stderr, "Unrecognized option '%c'\n\n", c);
print_help();
exit(0);
}
}
if (show_help != 0) {
print_help();
exit(0);
}
if (show_usage != 0) {
print_usage();
exit(0);
}
iscsi = iscsi_create_context(initiator);
if (iscsi == NULL) {
fprintf(stderr, "Failed to create context\n");
exit(10);
}
if (debug > 0) {
iscsi_set_log_level(iscsi, debug);
iscsi_set_log_fn(iscsi, iscsi_log_to_stderr);
}
if (argv[optind] != NULL) {
url = strdup(argv[optind]);
}
if (url == NULL) {
fprintf(stderr, "You must specify the URL\n");
print_usage();
ret = 10;
goto finished;
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
free(discard_const(url));
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",
iscsi_get_error(iscsi));
ret = 10;
goto finished;
}
iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL);
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) {
fprintf(stderr, "Login Failed. %s\n", iscsi_get_error(iscsi));
ret = 10;
goto finished;
}
sense_task = iscsi_modesense10_sync(iscsi, iscsi_url->lun,
0, 1, SCSI_MODESENSE_PC_CURRENT,
SCSI_MODEPAGE_CONTROL,
0, 255);
if (sense_task == NULL) {
printf("Failed to send MODE_SENSE10 command: %s\n",
iscsi_get_error(iscsi));
ret = 10;
goto finished;
}
if (sense_task->status != SCSI_STATUS_GOOD) {
printf("MODE_SENSE10 failed: %s\n",
iscsi_get_error(iscsi));
ret = 10;
goto finished;
}
ms = scsi_datain_unmarshall(sense_task);
if (ms == NULL) {
printf("failed to unmarshall mode sense datain blob\n");
ret = 10;
goto finished;
}
mp = scsi_modesense_get_page(ms, SCSI_MODEPAGE_CONTROL, 0);
if (mp == NULL) {
printf("failed to read control mode page\n");
ret = 10;
goto finished;
}
/* For MODE SELECT PS is reserved and hence must be cleared */
mp->ps = 0;
printf("SWP:%d\n", mp->control.swp);
switch (swp) {
case 1:
mp->control.swp = 1;
break;
case 2:
mp->control.swp = 0;
break;
default:
goto finished;
}
printf("Turning SWP %s\n", (swp == 1) ? "ON" : "OFF");
select_task = iscsi_modeselect10_sync(iscsi, iscsi_url->lun,
1, 0, mp);
if (select_task == NULL) {
printf("Failed to send MODE_SELECT10 command: %s\n",
iscsi_get_error(iscsi));
ret = 10;
goto finished;
}
if (select_task->status != SCSI_STATUS_GOOD) {
printf("MODE_SELECT10 failed: %s\n",
iscsi_get_error(iscsi));
ret = 10;
goto finished;
}
finished:
if (sense_task != NULL) {
scsi_free_scsi_task(sense_task);
}
if (select_task != NULL) {
scsi_free_scsi_task(select_task);
}
if (iscsi_url != NULL) {
iscsi_destroy_url(iscsi_url);
}
iscsi_logout_sync(iscsi);
iscsi_destroy_context(iscsi);
return ret;
}
struct iscsi_context *
iscsi_create_context(const char *initiator_name)
{
struct iscsi_context *iscsi;
size_t required = ISCSI_RAW_HEADER_SIZE + ISCSI_DIGEST_SIZE;
char *ca;
if (!initiator_name[0]) {
return NULL;
}
iscsi = malloc(sizeof(struct iscsi_context));
if (iscsi == NULL) {
return NULL;
}
memset(iscsi, 0, sizeof(struct iscsi_context));
/* initalize transport of context */
if (iscsi_init_transport(iscsi, TCP_TRANSPORT)) {
iscsi_set_error(iscsi, "Failed allocating transport");
return NULL;
}
strncpy(iscsi->initiator_name,initiator_name,MAX_STRING_SIZE);
iscsi->fd = -1;
srand(time(NULL) ^ getpid() ^ (uint32_t) ((uintptr_t) iscsi));
/* initialize to a "random" isid */
iscsi_set_isid_random(iscsi, rand(), 0);
/* assume we start in security negotiation phase */
iscsi->current_phase = ISCSI_PDU_LOGIN_CSG_SECNEG;
iscsi->next_phase = ISCSI_PDU_LOGIN_NSG_OPNEG;
iscsi->secneg_phase = ISCSI_LOGIN_SECNEG_PHASE_OFFER_CHAP;
iscsi->max_burst_length = 262144;
iscsi->first_burst_length = 262144;
iscsi->initiator_max_recv_data_segment_length = 262144;
iscsi->target_max_recv_data_segment_length = 8192;
iscsi->want_initial_r2t = ISCSI_INITIAL_R2T_NO;
iscsi->use_initial_r2t = ISCSI_INITIAL_R2T_YES;
iscsi->want_immediate_data = ISCSI_IMMEDIATE_DATA_YES;
iscsi->use_immediate_data = ISCSI_IMMEDIATE_DATA_YES;
iscsi->want_header_digest = ISCSI_HEADER_DIGEST_NONE_CRC32C;
iscsi->tcp_keepcnt=3;
iscsi->tcp_keepintvl=30;
iscsi->tcp_keepidle=30;
iscsi->reconnect_max_retries = -1;
if (getenv("LIBISCSI_DEBUG") != NULL) {
iscsi_set_log_level(iscsi, atoi(getenv("LIBISCSI_DEBUG")));
iscsi_set_log_fn(iscsi, iscsi_log_to_stderr);
}
if (getenv("LIBISCSI_TCP_USER_TIMEOUT") != NULL) {
iscsi_set_tcp_user_timeout(iscsi,atoi(getenv("LIBISCSI_TCP_USER_TIMEOUT")));
}
if (getenv("LIBISCSI_TCP_KEEPCNT") != NULL) {
iscsi_set_tcp_keepcnt(iscsi,atoi(getenv("LIBISCSI_TCP_KEEPCNT")));
}
if (getenv("LIBISCSI_TCP_KEEPINTVL") != NULL) {
iscsi_set_tcp_keepintvl(iscsi,atoi(getenv("LIBISCSI_TCP_KEEPINTVL")));
}
if (getenv("LIBISCSI_TCP_KEEPIDLE") != NULL) {
iscsi_set_tcp_keepidle(iscsi,atoi(getenv("LIBISCSI_TCP_KEEPIDLE")));
}
if (getenv("LIBISCSI_TCP_SYNCNT") != NULL) {
iscsi_set_tcp_syncnt(iscsi,atoi(getenv("LIBISCSI_TCP_SYNCNT")));
}
if (getenv("LIBISCSI_BIND_INTERFACES") != NULL) {
iscsi_set_bind_interfaces(iscsi,getenv("LIBISCSI_BIND_INTERFACES"));
}
/* iscsi->smalloc_size is the size for small allocations. this should be
max(ISCSI_HEADER_SIZE, sizeof(struct iscsi_pdu), sizeof(struct iscsi_in_pdu))
rounded up to the next power of 2. */
required = MAX(required, sizeof(struct iscsi_pdu));
required = MAX(required, sizeof(struct iscsi_in_pdu));
iscsi->smalloc_size = 1;
while (iscsi->smalloc_size < required) {
iscsi->smalloc_size <<= 1;
}
ISCSI_LOG(iscsi,5,"small allocation size is %d byte", iscsi->smalloc_size);
ca = getenv("LIBISCSI_CACHE_ALLOCATIONS");
if (!ca || atoi(ca) != 0) {
iscsi->cache_allocations = 1;
}
return iscsi;
}
int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
const char *url = NULL;
struct iscsi_url *iscsi_url = NULL;
int evpd = 0, pagecode = 0;
int show_help = 0, show_usage = 0, debug = 0;
int c;
static struct option long_options[] = {
{"help", no_argument, NULL, 'h'},
{"usage", no_argument, NULL, 'u'},
{"debug", no_argument, NULL, 'd'},
{"initiator-name", required_argument, NULL, 'i'},
{"evpd", required_argument, NULL, 'e'},
{"pagecode", required_argument, NULL, 'c'},
{0, 0, 0, 0}
};
int option_index;
while ((c = getopt_long(argc, argv, "h?udi:e:c:", long_options,
&option_index)) != -1) {
switch (c) {
case 'h':
case '?':
show_help = 1;
break;
case 'u':
show_usage = 1;
break;
case 'd':
debug = 1;
break;
case 'i':
initiator = optarg;
break;
case 'e':
evpd = atoi(optarg);
break;
case 'c':
pagecode = atoi(optarg);
break;
default:
fprintf(stderr, "Unrecognized option '%c'\n\n", c);
print_help();
exit(0);
}
}
if (show_help != 0) {
print_help();
exit(0);
}
if (show_usage != 0) {
print_usage();
exit(0);
}
iscsi = iscsi_create_context(initiator);
if (iscsi == NULL) {
fprintf(stderr, "Failed to create context\n");
exit(10);
}
if (debug > 0) {
iscsi_set_log_level(iscsi, debug);
iscsi_set_log_fn(iscsi, iscsi_log_to_stderr);
}
if (argv[optind] != NULL) {
url = strdup(argv[optind]);
}
if (url == NULL) {
fprintf(stderr, "You must specify the URL\n");
print_usage();
exit(10);
}
iscsi_url = iscsi_parse_full_url(iscsi, url);
if (url) {
free(discard_const(url));
}
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",
iscsi_get_error(iscsi));
exit(10);
}
iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL);
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);
if (iscsi_full_connect_sync(iscsi, iscsi_url->portal, iscsi_url->lun) != 0) {
fprintf(stderr, "Login Failed. %s\n", iscsi_get_error(iscsi));
iscsi_destroy_url(iscsi_url);
iscsi_destroy_context(iscsi);
exit(10);
}
do_inquiry(iscsi, iscsi_url->lun, evpd, pagecode);
iscsi_destroy_url(iscsi_url);
iscsi_logout_sync(iscsi);
iscsi_destroy_context(iscsi);
return 0;
}
