/* 
   iscsi-test tool

   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/>.
*/

#define _GNU_SOURCE
#include <sys/syscall.h>
#include <dlfcn.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <poll.h>
#include <popt.h>
#include <fnmatch.h>
#include "slist.h"
#include "iscsi.h"
#include "scsi-lowlevel.h"
#include "iscsi-private.h"
#include "iscsi-test.h"

const char *initiator = "iqn.2007-10.com.github:sahlberg:libiscsi:iscsi-test";
static int data_loss = 0;
static int show_info = 0;

struct scsi_test {
       const char *name;
       int (*test)(const char *initiator, const char *url, int data_loss, int show_info);
};

struct scsi_test tests[] = {
/* SCSI protocol tests */

/* read10*/
{ "T0100_read10_simple",		T0100_read10_simple },
{ "T0101_read10_beyond_eol",		T0101_read10_beyond_eol },
{ "T0102_read10_0blocks",		T0102_read10_0blocks },
{ "T0103_read10_rdprotect",		T0103_read10_rdprotect },
{ "T0104_read10_flags",			T0104_read10_flags },
{ "T0105_read10_invalid",      		T0105_read10_invalid },

/* readcapacity10*/
{ "T0110_readcapacity10_simple",	T0110_readcapacity10_simple },

/* read6*/
{ "T0120_read6_simple",			T0120_read6_simple },
{ "T0121_read6_beyond_eol",		T0121_read6_beyond_eol },
{ "T0122_read6_invalid",      		T0122_read6_invalid },

/* verify10*/
{ "T0130_verify10_simple",		T0130_verify10_simple },
{ "T0131_verify10_mismatch",		T0131_verify10_mismatch },
{ "T0132_verify10_mismatch_no_cmp",	T0132_verify10_mismatch_no_cmp },
{ "T0133_verify10_beyondeol",		T0133_verify10_beyondeol },

/* readcapacity16*/
{ "T0160_readcapacity16_simple",	T0160_readcapacity16_simple },
{ "T0161_readcapacity16_alloclen",	T0161_readcapacity16_alloclen },

/* unmap*/
{ "T0170_unmap_simple",			T0170_unmap_simple },
{ "T0171_unmap_zero",			T0171_unmap_zero },

/* writesame10*/
{ "T0180_writesame10_unmap",		T0180_writesame10_unmap },
{ "T0181_writesame10_unmap_unaligned",	T0181_writesame10_unmap_unaligned },
{ "T0182_writesame10_beyondeol",	T0182_writesame10_beyondeol },
{ "T0183_writesame10_wrprotect",	T0183_writesame10_wrprotect },
{ "T0184_writesame10_0blocks",		T0184_writesame10_0blocks },

/* writesame16*/
{ "T0190_writesame16_unmap",		T0190_writesame16_unmap },
{ "T0191_writesame16_unmap_unaligned",	T0191_writesame16_unmap_unaligned },
{ "T0192_writesame16_beyondeol",	T0192_writesame16_beyondeol },
{ "T0193_writesame16_wrprotect",	T0193_writesame16_wrprotect },
{ "T0194_writesame16_0blocks",		T0194_writesame16_0blocks },

/* read16*/
{ "T0200_read16_simple",		T0200_read16_simple },
{ "T0201_read16_rdprotect",		T0201_read16_rdprotect },
{ "T0202_read16_flags",			T0202_read16_flags },
{ "T0203_read16_0blocks",		T0203_read16_0blocks },
{ "T0204_read16_beyondeol",		T0204_read16_beyondeol },

/* read12*/
{ "T0210_read12_simple",		T0210_read12_simple },
{ "T0211_read12_rdprotect",		T0211_read12_rdprotect },
{ "T0212_read12_flags",			T0212_read12_flags },
{ "T0213_read12_0blocks",		T0213_read12_0blocks },
{ "T0214_read12_beyondeol",		T0214_read12_beyondeol },

/* write16*/
{ "T0220_write16_simple",		T0220_write16_simple },
{ "T0221_write16_wrprotect",		T0221_write16_wrprotect },
{ "T0222_write16_flags",	       	T0222_write16_flags },
{ "T0223_write16_0blocks",		T0223_write16_0blocks },
{ "T0224_write16_beyondeol",		T0224_write16_beyondeol },

/* write12*/
{ "T0230_write12_simple",		T0230_write12_simple },
{ "T0231_write12_wrprotect",		T0231_write12_wrprotect },
{ "T0232_write12_flags",	       	T0232_write12_flags },
{ "T0233_write12_0blocks",		T0233_write12_0blocks },
{ "T0234_write12_beyondeol",		T0234_write12_beyondeol },

/* prefetch10*/
{ "T0240_prefetch10_simple",		T0240_prefetch10_simple },
{ "T0241_prefetch10_flags",		T0241_prefetch10_flags },
{ "T0242_prefetch10_beyondeol",		T0242_prefetch10_beyondeol },
{ "T0243_prefetch10_0blocks",		T0243_prefetch10_0blocks },

/* prefetch16*/
{ "T0250_prefetch16_simple",		T0250_prefetch16_simple },
{ "T0251_prefetch16_flags",		T0251_prefetch16_flags },
{ "T0252_prefetch16_beyondeol",		T0252_prefetch16_beyondeol },
{ "T0253_prefetch16_0blocks",		T0253_prefetch16_0blocks },

/* get_lba_status */
{ "T0260_get_lba_status_simple",	T0260_get_lba_status_simple },
{ "T0264_get_lba_status_beyondeol",	T0264_get_lba_status_beyondeol },

/* verify16*/
{ "T0270_verify16_simple",		T0270_verify16_simple },
{ "T0271_verify16_mismatch",		T0271_verify16_mismatch },
{ "T0272_verify16_mismatch_no_cmp",	T0272_verify16_mismatch_no_cmp },
{ "T0273_verify16_beyondeol",		T0273_verify16_beyondeol },

/* verify12*/
{ "T0280_verify12_simple",		T0280_verify12_simple },
{ "T0281_verify12_mismatch",		T0281_verify12_mismatch },
{ "T0282_verify12_mismatch_no_cmp",	T0282_verify12_mismatch_no_cmp },
{ "T0283_verify12_beyondeol",		T0283_verify12_beyondeol },

/* write10*/
{ "T0290_write10_simple",		T0290_write10_simple },
{ "T0291_write10_wrprotect",		T0291_write10_wrprotect },
{ "T0292_write10_flags",	       	T0292_write10_flags },
{ "T0293_write10_0blocks",		T0293_write10_0blocks },
{ "T0294_write10_beyondeol",		T0294_write10_beyondeol },

/* Readonly */
{ "T0300_readonly",			T0300_readonly },

/* writeverify10*/
{ "T0310_writeverify10_simple",		T0310_writeverify10_simple },
{ "T0311_writeverify10_wrprotect",	T0311_writeverify10_wrprotect },
{ "T0314_writeverify10_beyondeol",	T0314_writeverify10_beyondeol },

/* writeverify12*/
{ "T0320_writeverify12_simple",		T0320_writeverify12_simple },
{ "T0321_writeverify12_wrprotect",	T0321_writeverify12_wrprotect },
{ "T0324_writeverify12_beyondeol",	T0324_writeverify12_beyondeol },

/* writeverify16*/
{ "T0330_writeverify16_simple",		T0330_writeverify16_simple },
{ "T0331_writeverify16_wrprotect",	T0331_writeverify16_wrprotect },
{ "T0334_writeverify16_beyondeol",	T0334_writeverify16_beyondeol },

/* compareandwrite*/
{ "T0340_compareandwrite_simple",	T0340_compareandwrite_simple },
{ "T0341_compareandwrite_mismatch",	T0341_compareandwrite_mismatch },
{ "T0343_compareandwrite_beyondeol",	T0343_compareandwrite_beyondeol },

/* orwrite*/
{ "T0350_orwrite_simple",		T0350_orwrite_simple },
{ "T0351_orwrite_wrprotect",		T0351_orwrite_wrprotect },
{ "T0354_orwrite_beyindeol",		T0354_orwrite_beyondeol },

/* startstopunit*/
{ "T0360_startstopunit_simple",		T0360_startstopunit_simple },
{ "T0361_startstopunit_pwrcnd",		T0361_startstopunit_pwrcnd },
{ "T0362_startstopunit_noloej",		T0362_startstopunit_noloej },

/* nomedia*/
{ "T0370_nomedia",			T0370_nomedia },

/* preventallowmediumremoval*/
{ "T0380_preventallow_simple",		T0380_preventallow_simple },
{ "T0381_preventallow_eject",		T0381_preventallow_eject },
{ "T0382_preventallow_itnexus_loss",	T0382_preventallow_itnexus_loss },
{ "T0383_preventallow_target_warm_reset",	T0383_preventallow_target_warm_reset },
{ "T0384_preventallow_target_cold_reset",	T0384_preventallow_target_cold_reset },
{ "T0385_preventallow_lun_reset",	T0385_preventallow_lun_reset },
{ "T0386_preventallow_2_itl_nexuses",	T0386_preventallow_2_itl_nexuses },

/* support for mandatory opcodes*/
{ "T0390_mandatory_opcodes_sbc",	T0390_mandatory_opcodes_sbc },

/* inquiry*/
{ "T0400_inquiry_basic",		T0400_inquiry_basic },

/* iSCSI protocol tests */

/* invalid cmdsn from initiator */
{ "T1000_cmdsn_invalid",		T1000_cmdsn_invalid },

/* invalid datasn from initiator */
{ "T1010_datasn_invalid",		T1010_datasn_invalid },

/* invalid bufferoffset from initiator */
{ "T1020_bufferoffset_invalid",		T1020_bufferoffset_invalid },

{ NULL, NULL }
};

void print_usage(void)
{
	fprintf(stderr, "Usage: iscsi-test [-?] [-?|--help] [--usage] [-t|--test=<test>]\n"
			"\t\t[-l|--list] [--info] [-i|--initiator-name=<iqn-name>]\n"
			"\t\t<iscsi-url>\n");
}

void print_help(void)
{
	fprintf(stderr, "Usage: iscsi-test [OPTION...] <iscsi-url>\n");
	fprintf(stderr, "  -i, --initiator-name=iqn-name     Initiatorname to use\n");
	fprintf(stderr, "  -t, --test=test-name              Which test to run. Default is to run all tests.\n");
	fprintf(stderr, "  -l, --list                        List all tests.\n");
	fprintf(stderr, "  --info,                           Print extra info about a test.\n");
	fprintf(stderr, "  --dataloss                        Allow destructive tests.\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 URL format : %s\n", ISCSI_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");
}


struct iscsi_context *iscsi_context_login(const char *initiatorname, const char *url, int *lun)
{
	struct iscsi_context *iscsi;
	struct iscsi_url *iscsi_url;

	iscsi = iscsi_create_context(initiatorname);
	if (iscsi == NULL) {
		fprintf(stderr, "Failed to create context\n");
		return NULL;
	}

	iscsi_url = iscsi_parse_full_url(iscsi, url);
	if (iscsi_url == NULL) {
		fprintf(stderr, "Failed to parse URL: %s\n", 
			iscsi_get_error(iscsi));
		iscsi_destroy_context(iscsi);
		return NULL;
	}

	iscsi_set_targetname(iscsi, iscsi_url->target);
	iscsi_set_session_type(iscsi, ISCSI_SESSION_NORMAL);
	iscsi_set_header_digest(iscsi, ISCSI_HEADER_DIGEST_NONE_CRC32C);

	if (iscsi_url->user != NULL) {
		if (iscsi_set_initiator_username_pwd(iscsi, iscsi_url->user, iscsi_url->passwd) != 0) {
			fprintf(stderr, "Failed to set initiator username and password\n");
			iscsi_destroy_url(iscsi_url);
			iscsi_destroy_context(iscsi);
			return NULL;
		}
	}

	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);
		return NULL;
	}
	if (lun != NULL) {
		*lun = iscsi_url->lun;
	}

	iscsi_destroy_url(iscsi_url);
	return iscsi;
}

void wait_until_test_finished(struct iscsi_context *iscsi, struct iscsi_async_state *state)
{
	struct pollfd pfd;
	int count = 0;
	int ret;

	while (state->finished == 0) {
		pfd.fd = iscsi_get_fd(iscsi);
		pfd.events = iscsi_which_events(iscsi);

		ret = poll(&pfd, 1, 1000);
		if (ret < 0) {
			printf("Poll failed");
			exit(10);
		}
		if (ret == 0) {
			if (count++ > 5) {
				struct iscsi_pdu *pdu;

				state->finished     = 1;
				state->status       = SCSI_STATUS_CANCELLED;
				state->task->status = SCSI_STATUS_CANCELLED;
				/* this may leak memory since we dont free the pdu */
				while ((pdu = iscsi->outqueue)) {
					SLIST_REMOVE(&iscsi->outqueue, pdu);
				}
				while ((pdu = iscsi->waitpdu)) {
					SLIST_REMOVE(&iscsi->waitpdu, pdu);
				}
				return;
			}
			continue;
		}
		if (iscsi_service(iscsi, pfd.revents) < 0) {
			printf("iscsi_service failed with : %s\n", iscsi_get_error(iscsi));
			break;
		}
	}
}

static int (*real_iscsi_queue_pdu)(struct iscsi_context *iscsi, struct iscsi_pdu *pdu);

int iscsi_queue_pdu(struct iscsi_context *iscsi, struct iscsi_pdu *pdu)
{
	if (local_iscsi_queue_pdu != NULL) {
		local_iscsi_queue_pdu(iscsi, pdu);
	}
	return real_iscsi_queue_pdu(iscsi, pdu);
}

int main(int argc, const char *argv[])
{
	poptContext pc;
	const char **extra_argv;
	int extra_argc = 0;
	const char *url = NULL;
	int show_help = 0, show_usage = 0, list_tests = 0;
	int res, num_failed, num_skipped;
	struct scsi_test *test;
	char *testname = NULL;

	struct poptOption popt_options[] = {
		{ "help", '?', POPT_ARG_NONE, &show_help, 0, "Show this help message", NULL },
		{ "usage", 0, POPT_ARG_NONE, &show_usage, 0, "Display brief usage message", NULL },
		{ "list", 'l', POPT_ARG_NONE, &list_tests, 0, "List all tests", NULL },
		{ "initiator-name", 'i', POPT_ARG_STRING, &initiator, 0, "Initiatorname to use", "iqn-name" },
		{ "test", 't', POPT_ARG_STRING, &testname, 0, "Which test to run", "testname" },
		{ "info", 0, POPT_ARG_NONE, &show_info, 0, "Show information about the test", "testname" },
		{ "dataloss", 0, POPT_ARG_NONE, &data_loss, 0, "Allow destructuve tests", NULL },
		POPT_TABLEEND
	};

	real_iscsi_queue_pdu = dlsym(RTLD_NEXT, "iscsi_queue_pdu");

	pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_POSIXMEHARDER);
	if ((res = poptGetNextOpt(pc)) < -1) {
		fprintf(stderr, "Failed to parse option : %s %s\n",
			poptBadOption(pc, 0), poptStrerror(res));
		exit(10);
	}
	extra_argv = poptGetArgs(pc);
	if (extra_argv) {
		url = *extra_argv;
		extra_argv++;
		while (extra_argv[extra_argc]) {
			extra_argc++;
		}
	}

	if (show_help != 0) {
		print_help();
		exit(0);
	}

	if (show_usage != 0) {
		print_usage();
		exit(0);
	}

	if (list_tests != 0) {
		for (test = &tests[0]; test->name; test++) {
			printf("%s\n", test->name);
			if (show_info) {
				test->test(initiator, url, data_loss, show_info);
			}
		}
		exit(0);
	}
	poptFreeContext(pc);

	if (url == NULL) {
		fprintf(stderr, "You must specify the URL\n");
		print_usage();
		exit(10);
	}

	num_failed = num_skipped = 0;
	for (test = &tests[0]; test->name; test++) {
		if (testname != NULL && fnmatch(testname, test->name, 0)) {
			continue;
		}

		res = test->test(initiator, url, data_loss, show_info);
		if (res == 0) {
			printf("TEST %s [OK]\n", test->name);
		} else if (res == -2) {
			printf("TEST %s [SKIPPED]\n", test->name);
			num_skipped++;
		} else {
			printf("TEST %s [FAILED]\n", test->name);
			num_failed++;
		}
		printf("\n");
	}

	return num_failed ? num_failed : num_skipped ? 77 : 0;
}