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libiscsi/utils/iscsi-ls.c
Bart Van Assche 2a5a0b3291 Enable -Wno-unused-parameter 
Instead of adding __attribute__((unused)) to unused arguments, add the
-Wno-unused-parameter compiler flag.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
2021-05-23 13:23:41 -07:00

444 lines
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C
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/*
Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if defined(_WIN32)
#include <winsock2.h>
#include "win32_compat.h"
#pragma comment(lib, "ws2_32.lib")
WSADATA wsaData;
#endif
#ifdef HAVE_POLL_H
#include <poll.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include "iscsi.h"
#include "scsi-lowlevel.h"
int showluns;
int useurls;
const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:iscsi-ls";
struct client_state {
int finished;
int status;
int lun;
int type;
const char *username;
const char *password;
};
void event_loop(struct iscsi_context *iscsi, struct client_state *state)
{
struct pollfd pfd;
while (state->finished == 0) {
pfd.fd = iscsi_get_fd(iscsi);
pfd.events = iscsi_which_events(iscsi);
if (!pfd.events) {
sleep(1);
continue;
}
if (poll(&pfd, 1, -1) < 0) {
fprintf(stderr, "Poll failed");
exit(10);
}
if (iscsi_service(iscsi, pfd.revents) < 0) {
fprintf(stderr, "iscsi_service failed with : %s\n", iscsi_get_error(iscsi));
exit(10);
}
}
}
void show_lun(struct iscsi_context *iscsi, int lun)
{
struct scsi_task *task;
struct scsi_inquiry_standard *inq;
int type, no_media;
long long size = 0;
int size_pf = 0;
static const char sf[] = {' ', 'k', 'M', 'G', 'T' };
/* check we can talk to the lun */
tur_try_again:
if ((task = iscsi_testunitready_sync(iscsi, lun)) == NULL) {
fprintf(stderr, "testunitready failed\n");
exit(10);
}
if (task->status == SCSI_STATUS_CHECK_CONDITION) {
if (task->sense.key == SCSI_SENSE_UNIT_ATTENTION && task->sense.ascq == SCSI_SENSE_ASCQ_BUS_RESET) {
scsi_free_scsi_task(task);
goto tur_try_again;
}
}
no_media = 0;
if (task->status == SCSI_STATUS_CHECK_CONDITION
&& task->sense.key == SCSI_SENSE_NOT_READY
&& task->sense.ascq == SCSI_SENSE_ASCQ_MEDIUM_NOT_PRESENT) {
/* not an error, just a cdrom without a disk most likely */
no_media = 1;
} else if (task->status != SCSI_STATUS_GOOD) {
fprintf(stderr, "TESTUNITREADY failed with %s\n", iscsi_get_error(iscsi));
exit(10);
}
scsi_free_scsi_task(task);
/* check what type of lun we have */
task = iscsi_inquiry_sync(iscsi, lun, 0, 0, 64);
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
fprintf(stderr, "failed to send inquiry command : %s\n", iscsi_get_error(iscsi));
exit(10);
}
inq = scsi_datain_unmarshall(task);
if (inq == NULL) {
fprintf(stderr, "failed to unmarshall inquiry datain blob\n");
exit(10);
}
type = inq->device_type;
scsi_free_scsi_task(task);
if (type == SCSI_INQUIRY_PERIPHERAL_DEVICE_TYPE_DIRECT_ACCESS) {
struct scsi_readcapacity10 *rc10;
task = iscsi_readcapacity10_sync(iscsi, lun, 0, 0);
if (task == NULL || task->status != SCSI_STATUS_GOOD) {
fprintf(stderr, "failed to send readcapacity command\n");
exit(10);
}
rc10 = scsi_datain_unmarshall(task);
if (rc10 == NULL) {
fprintf(stderr, "failed to unmarshall readcapacity10 data\n");
exit(10);
}
size = rc10->block_size;
size *= rc10->lba;
for (size_pf=0; size_pf<4 && size > 1024; size_pf++) {
size /= 1024;
}
scsi_free_scsi_task(task);
}
printf("Lun:%-4d Type:%s", lun, scsi_devtype_to_str(type));
if (type == SCSI_INQUIRY_PERIPHERAL_DEVICE_TYPE_DIRECT_ACCESS) {
printf(" (Size:%lld%c)", size, sf[size_pf]);
}
if (no_media) {
printf(" (No media loaded)");
}
printf("\n");
}
void list_luns(struct client_state *clnt, const char *target, const char *portal)
{
struct iscsi_context *iscsi;
struct scsi_task *task;
struct scsi_reportluns_list *list;
int full_report_size;
int i;
if (strncasecmp(portal, "[fe80:", 6) == 0) {
fprintf(stderr, "skipping link-local address\n");
return;
}
iscsi = iscsi_create_context(initiator);
if (iscsi == NULL) {
printf("Failed to create context\n");
exit(10);
}
iscsi_set_initiator_username_pwd(iscsi, clnt->username, clnt->password);
if (iscsi_set_targetname(iscsi, target)) {
fprintf(stderr, "Failed to set target name\n");
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, portal, -1) != 0) {
printf("list_luns: iscsi_connect failed. %s\n",
iscsi_get_error(iscsi));
exit(10);
}
/* get initial reportluns data, all targets can report 16 bytes but some
* fail if we ask for too much.
*/
if ((task = iscsi_reportluns_sync(iscsi, 0, 16)) == NULL) {
fprintf(stderr, "reportluns failed : %s\n", iscsi_get_error(iscsi));
exit(10);
}
full_report_size = scsi_datain_getfullsize(task);
if (full_report_size > task->datain.size) {
scsi_free_scsi_task(task);
/* we need more data for the full list */
if ((task = iscsi_reportluns_sync(iscsi, 0, full_report_size)) == NULL) {
fprintf(stderr, "reportluns failed : %s\n", iscsi_get_error(iscsi));
exit(10);
}
}
list = scsi_datain_unmarshall(task);
if (list == NULL) {
fprintf(stderr, "failed to unmarshall reportluns datain blob\n");
exit(10);
}
for (i=0; i < (int)list->num; i++) {
show_lun(iscsi, list->luns[i]);
}
scsi_free_scsi_task(task);
iscsi_destroy_context(iscsi);
}
void discoverylogout_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data)
{
struct client_state *state = (struct client_state *)private_data;
if (status != 0) {
fprintf(stderr, "Failed to logout from target. : %s\n", iscsi_get_error(iscsi));
exit(10);
}
if (iscsi_disconnect(iscsi) != 0) {
fprintf(stderr, "Failed to disconnect old socket\n");
exit(10);
}
state->finished = 1;
}
void discovery_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data)
{
struct iscsi_discovery_address *addr;
if (status != 0) {
fprintf(stderr, "Failed to do discovery on target. : %s\n", iscsi_get_error(iscsi));
exit(10);
}
for(addr=command_data; addr; addr=addr->next) {
struct iscsi_target_portal *portal = addr->portals;
while (portal != NULL) {
if (useurls == 1 && showluns == 0) {
char *str = strrchr(portal->portal, ',');
if (str != NULL) {
str[0] = 0;
}
printf("iscsi://%s/%s/0\n", portal->portal, addr->target_name);
} else {
printf("Target:%s Portal:%s\n", addr->target_name, portal->portal);
}
if (showluns != 0) {
list_luns(private_data, addr->target_name, portal->portal);
}
portal = portal->next;
}
}
if (iscsi_logout_async(iscsi, discoverylogout_cb, private_data) != 0) {
fprintf(stderr, "iscsi_logout_async failed : %s\n", iscsi_get_error(iscsi));
exit(10);
}
}
void discoverylogin_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data)
{
if (status != 0) {
fprintf(stderr, "Login failed. %s\n", iscsi_get_error(iscsi));
exit(10);
}
if (iscsi_discovery_async(iscsi, discovery_cb, private_data) != 0) {
fprintf(stderr, "failed to send discovery command : %s\n", iscsi_get_error(iscsi));
exit(10);
}
}
void discoveryconnect_cb(struct iscsi_context *iscsi, int status, void *command_data, void *private_data)
{
if (status != 0) {
fprintf(stderr, "discoveryconnect_cb: connection failed : %s\n", iscsi_get_error(iscsi));
exit(10);
}
if (iscsi_login_async(iscsi, discoverylogin_cb, private_data) != 0) {
fprintf(stderr, "iscsi_login_async failed : %s\n", iscsi_get_error(iscsi));
exit(10);
}
}
void print_usage(void)
{
fprintf(stderr, "Usage: iscsi-ls [-?|--help] [-d|--debug] "
"[--usage] [-i|--initiator-name=iqn-name]\n"
"\t\t[-s|--show-luns] <iscsi-portal-url>\n");
}
void print_help(void)
{
fprintf(stderr, "Usage: iscsi-ls [OPTION...] <iscsi-url>\n");
fprintf(stderr, " -i, --initiator-name=iqn-name Initiatorname to use\n");
fprintf(stderr, " -d, --debug Print debug information\n");
fprintf(stderr, " -s, --show-luns Show the luns for each target\n");
fprintf(stderr, " --url Output targets in URL format\n");
fprintf(stderr, " (does not work with -s)\n");
fprintf(stderr, "\n");
fprintf(stderr, "Help options:\n");
fprintf(stderr, " -?, --help Show this help message\n");
fprintf(stderr, " --usage Display brief usage message\n");
fprintf(stderr, "\n");
fprintf(stderr, "iSCSI Portal URL format : %s\n", ISCSI_PORTAL_URL_SYNTAX);
fprintf(stderr, "\n");
fprintf(stderr, "<host> is either of:\n");
fprintf(stderr, " \"hostname\" iscsi.example\n");
fprintf(stderr, " \"ipv4-address\" 10.1.1.27\n");
fprintf(stderr, " \"ipv6-address\" [fce0::1]\n");
}
int main(int argc, char *argv[])
{
struct iscsi_context *iscsi;
struct iscsi_url *iscsi_url = NULL;
struct client_state state;
char *url = NULL;
int i;
static int show_help = 0, show_usage = 0, debug = 0;
#ifdef _WIN32
if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) {
printf("Failed to start Winsock2\n");
exit(10);
}
#endif
for (i = 1; i < argc; i++) {
if (!strcmp(argv[i], "-?") ||
!strcmp(argv[i], "-h") ||
!strcmp(argv[i], "--help")) {
show_help = 1;
} else if (!strcmp(argv[i], "-u") ||
!strcmp(argv[i], "-usage")) {
show_usage = 1;
} else if (!strcmp(argv[i], "-d") ||
!strcmp(argv[i], "--debug")) {
debug = 1;
} else if (!strcmp(argv[i], "-i") ||
!strcmp(argv[i], "--initiator-name")) {
initiator = argv[++i];
} else if (!strcmp(argv[i], "-s") ||
!strcmp(argv[i], "--show-luns")) {
showluns = 1;
} else if (!strcmp(argv[i], "-U") ||
!strcmp(argv[i], "--url")) {
useurls = 1;
} else if (!strncmp("iscsi://", argv[i], 8) ||
!strncmp("iser://", argv[i], 7)) {
url = strdup(argv[i]);
}
}
if (show_help != 0) {
print_help();
exit(0);
}
if (show_usage != 0) {
print_usage();
exit(0);
}
memset(&state, 0, sizeof(state));
if (url == NULL) {
fprintf(stderr, "You must specify iscsi target portal.\n");
print_usage();
exit(10);
}
iscsi = iscsi_create_context(initiator);
if (iscsi == NULL) {
printf("Failed to create context\n");
exit(10);
}
iscsi_set_session_type(iscsi, ISCSI_SESSION_DISCOVERY);
iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE);
if (debug > 0) {
iscsi_set_log_level(iscsi, debug);
iscsi_set_log_fn(iscsi, iscsi_log_to_stderr);
}
iscsi_url = iscsi_parse_portal_url(iscsi, url);
free(url);
if (iscsi_url == NULL) {
fprintf(stderr, "Failed to parse URL: %s\n",
iscsi_get_error(iscsi));
exit(10);
}
state.username = iscsi_url->user;
state.password = iscsi_url->passwd;
if (iscsi_connect_async(iscsi, iscsi_url->portal, discoveryconnect_cb, &state) != 0) {
fprintf(stderr, "connect_async: iscsi_connect failed. %s\n",
iscsi_get_error(iscsi));
exit(10);
}
event_loop(iscsi, &state);
iscsi_destroy_url(iscsi_url);
iscsi_destroy_context(iscsi);
return 0;
}
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