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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/tests/sys/cam/ctl/prout_register_huge_cdb.c
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/*

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2024 ConnectWise

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 * All rights reserved.

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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 */

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/*

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 * Helper that sends a PERSISTENT RESERVATION OUT command to CTL with a

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 * ridiculously huge size for the length of the CDB.  This is not possible with

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 * ctladm, for good reason.

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 */

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#include <camlib.h>

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#include <err.h>

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#include <fcntl.h>

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#include <stdio.h>

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#include <stdlib.h>

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#include <string.h>

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#include <sys/ioctl.h>

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#include <cam/scsi/scsi_message.h>

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#include <cam/ctl/ctl_io.h>

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#include <cam/ctl/ctl.h>

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#include <cam/ctl/ctl_ioctl.h>

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#include <cam/ctl/ctl_util.h>

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int

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main(int argc, char **argv)

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{

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	union ctl_io *io;

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	int fd = open("/dev/cam/ctl", O_RDWR);

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	int r;

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	uint32_t targ_port;

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	if (argc < 2)

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		errx(2, "usage: prout_register_huge_cdb <target_port>\n");

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	targ_port = strtoul(argv[1], NULL, 10);

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	io = calloc(1, sizeof(*io));

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	io->io_hdr.nexus.initid = 7;	/* 7 is ctladm's default initiator id */

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	io->io_hdr.nexus.targ_port = targ_port;

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	io->io_hdr.nexus.targ_mapped_lun = 0;

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	io->io_hdr.nexus.targ_lun = 0;

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	io->io_hdr.io_type = CTL_IO_SCSI;

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	io->taskio.tag_type = CTL_TAG_UNTAGGED;

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	uint8_t cdb[32] = {};

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	// ctl_persistent_reserve_out// 5f 00

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	cdb[0] = 0x5f;

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	cdb[1] = 0x00;

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	struct scsi_per_res_out *cdb_ = ( struct scsi_per_res_out *)cdb;

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	// Claim an enormous size of the CDB, but don't actually alloc it all.

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	cdb_->length[0] = 0xff;

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	cdb_->length[1] = 0xff;

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	cdb_->length[2] = 0xff;

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	cdb_->length[3] = 0xff;

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	io->scsiio.cdb_len = sizeof(cdb);

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	memcpy(io->scsiio.cdb, cdb, sizeof(cdb));

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	io->io_hdr.flags |= CTL_FLAG_DATA_IN;

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	r = ioctl(fd, CTL_IO, io);

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	if (r == -1)

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		err(1, "ioctl");

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	if ((io->io_hdr.status & CTL_STATUS_MASK) == CTL_SUCCESS) {

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		return (0);

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	} else {

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		return (1);

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	}

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}

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