760 lines
20 KiB
C
760 lines
20 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 1997, 1998, 1999, 2002 Kenneth D. Merry.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <sys/param.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <ctype.h>
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#include <cam/cam.h>
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#include <cam/scsi/scsi_all.h>
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#include <cam/cam_ccb.h>
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#include <cam/scsi/scsi_pass.h>
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#include "camlib.h"
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static const char *nonrewind_devs[] = {
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"sa"
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};
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char cam_errbuf[CAM_ERRBUF_SIZE];
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static struct cam_device *cam_real_open_device(const char *path, int flags,
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struct cam_device *device,
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const char *given_path,
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const char *given_dev_name,
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int given_unit_number);
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static struct cam_device *cam_lookup_pass(const char *dev_name, int unit,
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int flags, const char *given_path,
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struct cam_device *device);
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/*
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* Send a ccb to a passthrough device.
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*/
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int
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cam_send_ccb(struct cam_device *device, union ccb *ccb)
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{
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return(ioctl(device->fd, CAMIOCOMMAND, ccb));
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}
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/*
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* Malloc a CCB, zero out the header and set its path, target and lun ids.
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*/
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union ccb *
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cam_getccb(struct cam_device *dev)
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{
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union ccb *ccb;
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ccb = calloc(1, sizeof(*ccb));
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if (ccb != NULL) {
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ccb->ccb_h.path_id = dev->path_id;
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ccb->ccb_h.target_id = dev->target_id;
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ccb->ccb_h.target_lun = dev->target_lun;
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}
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return(ccb);
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}
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/*
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* Free a CCB.
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*/
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void
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cam_freeccb(union ccb *ccb)
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{
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free(ccb);
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}
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/*
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* Take a device name or path passed in by the user, and attempt to figure
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* out the device name and unit number. Some possible device name formats are:
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* /dev/foo0
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* foo0
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* nfoo0
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*
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* Some peripheral drivers create separate device nodes with 'n' prefix for
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* non-rewind operations. Currently only sa(4) tape driver has this feature.
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* We extract pure peripheral name as device name for this special case.
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*
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* Input parameters: device name/path, length of devname string
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* Output: device name, unit number
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* Return values: returns 0 for success, -1 for failure
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*/
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int
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cam_get_device(const char *path, char *dev_name, int devnamelen, int *unit)
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{
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char *tmpstr, *tmpstr2;
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char *newpath;
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int unit_offset;
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int i;
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if (path == NULL) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: device pathname was NULL", __func__);
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return(-1);
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}
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/*
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* Resolve the given path to a real device path in case we are given
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* an alias or other symbolic link. If the path cannot be resolved
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* then try to parse it as is.
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*/
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newpath = realpath(path, NULL);
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if (newpath == NULL)
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newpath = strdup(path);
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if (newpath == NULL)
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return (-1);
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tmpstr = newpath;
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/*
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* Check to see whether we have an absolute pathname.
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*/
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if (*tmpstr == '/') {
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tmpstr2 = tmpstr;
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tmpstr = strrchr(tmpstr2, '/');
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/* We know that tmpstr2 contains a '/', so strrchr can't fail */
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assert(tmpstr != NULL && *tmpstr != '\0');
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tmpstr++;
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}
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if (*tmpstr == '\0') {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: no text after slash", __func__);
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free(newpath);
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return(-1);
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}
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/*
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* Check to see whether the user has given us a nonrewound tape
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* device.
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*/
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if (*tmpstr == 'n' || *tmpstr == 'e') {
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for (i = 0; i < sizeof(nonrewind_devs)/sizeof(char *); i++) {
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int len = strlen(nonrewind_devs[i]);
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if (strncmp(tmpstr + 1, nonrewind_devs[i], len) == 0) {
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if (isdigit(tmpstr[len + 1])) {
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tmpstr++;
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break;
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}
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}
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}
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}
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/*
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* We should now have just a device name and unit number.
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* That means that there must be at least 2 characters.
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* If we only have 1, we don't have a valid device name.
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*/
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if (strlen(tmpstr) < 2) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: must have both device name and unit number",
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__func__);
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free(newpath);
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return(-1);
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}
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/*
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* If the first character of the string is a digit, then the user
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* has probably given us all numbers. Point out the error.
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*/
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if (isdigit(*tmpstr)) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: device name cannot begin with a number",
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__func__);
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free(newpath);
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return(-1);
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}
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/*
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* At this point, if the last character of the string isn't a
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* number, we know the user either didn't give us a device number,
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* or he gave us a device name/number format we don't recognize.
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*/
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if (!isdigit(tmpstr[strlen(tmpstr) - 1])) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: unable to find device unit number", __func__);
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free(newpath);
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return(-1);
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}
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/*
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* Attempt to figure out where the device name ends and the unit
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* number begins. As long as unit_offset is at least 1 less than
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* the length of the string, we can still potentially have a device
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* name at the front of the string. When we get to something that
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* isn't a digit, we've hit the device name. Because of the check
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* above, we know that this cannot happen when unit_offset == 1.
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* Therefore it is okay to decrement unit_offset -- it won't cause
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* us to go past the end of the character array.
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*/
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for (unit_offset = 1;
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(unit_offset < (strlen(tmpstr)))
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&& (isdigit(tmpstr[strlen(tmpstr) - unit_offset])); unit_offset++);
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unit_offset--;
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/*
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* Grab the unit number.
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*/
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*unit = atoi(&tmpstr[strlen(tmpstr) - unit_offset]);
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/*
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* Put a null in place of the first number of the unit number so
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* that all we have left is the device name.
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*/
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tmpstr[strlen(tmpstr) - unit_offset] = '\0';
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strlcpy(dev_name, tmpstr, devnamelen);
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/* Clean up allocated memory */
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free(newpath);
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return(0);
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}
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/*
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* Backwards compatible wrapper for the real open routine. This translates
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* a pathname into a device name and unit number for use with the real open
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* routine.
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*/
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struct cam_device *
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cam_open_device(const char *path, int flags)
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{
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int unit;
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char dev_name[DEV_IDLEN + 1];
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/*
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* cam_get_device() has already put an error message in cam_errbuf,
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* so we don't need to.
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*/
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if (cam_get_device(path, dev_name, sizeof(dev_name), &unit) == -1)
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return(NULL);
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return(cam_lookup_pass(dev_name, unit, flags, path, NULL));
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}
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/*
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* Open the passthrough device for a given bus, target and lun, if the
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* passthrough device exists.
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*/
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struct cam_device *
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cam_open_btl(path_id_t path_id, target_id_t target_id, lun_id_t target_lun,
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int flags, struct cam_device *device)
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{
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union ccb ccb;
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struct periph_match_pattern *match_pat;
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int fd, bufsize;
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if ((fd = open(XPT_DEVICE, O_RDWR)) < 0) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: couldn't open %s\n%s: %s", __func__, XPT_DEVICE,
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__func__, strerror(errno));
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return(NULL);
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}
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bzero(&ccb, sizeof(union ccb));
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ccb.ccb_h.func_code = XPT_DEV_MATCH;
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ccb.ccb_h.path_id = CAM_XPT_PATH_ID;
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ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
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ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;
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/* Setup the result buffer */
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bufsize = sizeof(struct dev_match_result);
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ccb.cdm.match_buf_len = bufsize;
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ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize);
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if (ccb.cdm.matches == NULL) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: couldn't malloc match buffer", __func__);
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close(fd);
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return(NULL);
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}
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ccb.cdm.num_matches = 0;
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/* Setup the pattern buffer */
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ccb.cdm.num_patterns = 1;
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ccb.cdm.pattern_buf_len = sizeof(struct dev_match_pattern);
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ccb.cdm.patterns = (struct dev_match_pattern *)malloc(
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sizeof(struct dev_match_pattern));
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if (ccb.cdm.patterns == NULL) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: couldn't malloc pattern buffer", __func__);
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free(ccb.cdm.matches);
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ccb.cdm.matches = NULL;
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close(fd);
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return(NULL);
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}
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ccb.cdm.patterns[0].type = DEV_MATCH_PERIPH;
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match_pat = &ccb.cdm.patterns[0].pattern.periph_pattern;
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/*
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* We're looking for the passthrough device associated with this
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* particular bus/target/lun.
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*/
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sprintf(match_pat->periph_name, "pass");
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match_pat->path_id = path_id;
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match_pat->target_id = target_id;
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match_pat->target_lun = target_lun;
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/* Now set the flags to indicate what we're looking for. */
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match_pat->flags = PERIPH_MATCH_PATH | PERIPH_MATCH_TARGET |
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PERIPH_MATCH_LUN | PERIPH_MATCH_NAME;
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if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: CAMIOCOMMAND ioctl failed\n"
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"%s: %s", __func__, __func__, strerror(errno));
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goto btl_bailout;
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}
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/*
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* Check for an outright error.
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*/
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if ((ccb.ccb_h.status != CAM_REQ_CMP)
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|| ((ccb.cdm.status != CAM_DEV_MATCH_LAST)
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&& (ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: CAM error %#x, CDM error %d "
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"returned from XPT_DEV_MATCH ccb", __func__,
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ccb.ccb_h.status, ccb.cdm.status);
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goto btl_bailout;
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}
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if (ccb.cdm.status == CAM_DEV_MATCH_MORE) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: CDM reported more than one"
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" passthrough device at %d:%d:%jx!!\n",
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__func__, path_id, target_id, (uintmax_t)target_lun);
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goto btl_bailout;
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}
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if (ccb.cdm.num_matches == 0) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: no passthrough device found at"
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" %d:%d:%jx", __func__, path_id, target_id,
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(uintmax_t)target_lun);
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goto btl_bailout;
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}
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switch(ccb.cdm.matches[0].type) {
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case DEV_MATCH_PERIPH: {
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int pass_unit;
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char dev_path[256];
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struct periph_match_result *periph_result;
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periph_result = &ccb.cdm.matches[0].result.periph_result;
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pass_unit = periph_result->unit_number;
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free(ccb.cdm.matches);
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ccb.cdm.matches = NULL;
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free(ccb.cdm.patterns);
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ccb.cdm.patterns = NULL;
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close(fd);
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sprintf(dev_path, "/dev/pass%d", pass_unit);
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return(cam_real_open_device(dev_path, flags, device, NULL,
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NULL, 0));
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break; /* NOTREACHED */
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}
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default:
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: asked for a peripheral match, but"
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" got a bus or device match", __func__);
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goto btl_bailout;
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break; /* NOTREACHED */
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}
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btl_bailout:
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free(ccb.cdm.matches);
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ccb.cdm.matches = NULL;
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free(ccb.cdm.patterns);
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ccb.cdm.patterns = NULL;
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close(fd);
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return(NULL);
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}
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struct cam_device *
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cam_open_spec_device(const char *dev_name, int unit, int flags,
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struct cam_device *device)
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{
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return(cam_lookup_pass(dev_name, unit, flags, NULL, device));
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}
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struct cam_device *
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cam_open_pass(const char *path, int flags, struct cam_device *device)
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{
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return(cam_real_open_device(path, flags, device, path, NULL, 0));
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}
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static struct cam_device *
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cam_lookup_pass(const char *dev_name, int unit, int flags,
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const char *given_path, struct cam_device *device)
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{
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int fd;
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union ccb ccb;
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char dev_path[256];
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/*
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* The flags argument above only applies to the actual passthrough
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* device open, not our open of the given device to find the
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* passthrough device.
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*/
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if ((fd = open(XPT_DEVICE, O_RDWR)) < 0) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: couldn't open %s\n%s: %s", __func__, XPT_DEVICE,
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__func__, strerror(errno));
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return(NULL);
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}
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/* This isn't strictly necessary for the GETPASSTHRU ioctl. */
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ccb.ccb_h.func_code = XPT_GDEVLIST;
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/* These two are necessary for the GETPASSTHRU ioctl to work. */
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strlcpy(ccb.cgdl.periph_name, dev_name, sizeof(ccb.cgdl.periph_name));
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ccb.cgdl.unit_number = unit;
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/*
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* Attempt to get the passthrough device. This ioctl will fail if
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* the device name is null, if the device doesn't exist, or if the
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* passthrough driver isn't in the kernel.
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*/
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if (ioctl(fd, CAMGETPASSTHRU, &ccb) == -1) {
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char tmpstr[256];
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/*
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* If we get ENOENT from the transport layer version of
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* the CAMGETPASSTHRU ioctl, it means one of two things:
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* either the device name/unit number passed in doesn't
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* exist, or the passthrough driver isn't in the kernel.
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*/
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if (errno == ENOENT) {
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snprintf(tmpstr, sizeof(tmpstr),
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"\n%s: either the pass driver isn't in "
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"your kernel\n%s: or %s%d doesn't exist",
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__func__, __func__, dev_name, unit);
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}
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: CAMGETPASSTHRU ioctl failed\n"
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"%s: %s%s", __func__, __func__, strerror(errno),
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(errno == ENOENT) ? tmpstr : "");
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close(fd);
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return(NULL);
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}
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close(fd);
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/*
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* If the ioctl returned the right status, but we got an error back
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* in the ccb, that means that the kernel found the device the user
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* passed in, but was unable to find the passthrough device for
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* the device the user gave us.
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*/
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if (ccb.cgdl.status == CAM_GDEVLIST_ERROR) {
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snprintf(cam_errbuf, nitems(cam_errbuf),
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"%s: device %s%d does not exist!",
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__func__, dev_name, unit);
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return(NULL);
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}
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sprintf(dev_path, "/dev/%s%d", ccb.cgdl.periph_name,
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ccb.cgdl.unit_number);
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return(cam_real_open_device(dev_path, flags, device, NULL,
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dev_name, unit));
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}
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/*
|
|
* Open a given device. The path argument isn't strictly necessary, but it
|
|
* is copied into the cam_device structure as a convenience to the user.
|
|
*/
|
|
static struct cam_device *
|
|
cam_real_open_device(const char *path, int flags, struct cam_device *device,
|
|
const char *given_path, const char *given_dev_name,
|
|
int given_unit_number)
|
|
{
|
|
union ccb ccb;
|
|
int fd = -1, malloced_device = 0;
|
|
|
|
/*
|
|
* See if the user wants us to malloc a device for him.
|
|
*/
|
|
if (device == NULL) {
|
|
if ((device = (struct cam_device *)malloc(
|
|
sizeof(struct cam_device))) == NULL) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: device structure malloc"
|
|
" failed\n%s: %s", __func__, __func__,
|
|
strerror(errno));
|
|
return(NULL);
|
|
}
|
|
device->fd = -1;
|
|
malloced_device = 1;
|
|
}
|
|
|
|
/*
|
|
* If the user passed in a path, save it for him.
|
|
*/
|
|
if (given_path != NULL)
|
|
strlcpy(device->device_path, given_path,
|
|
sizeof(device->device_path));
|
|
else
|
|
device->device_path[0] = '\0';
|
|
|
|
/*
|
|
* If the user passed in a device name and unit number pair, save
|
|
* those as well.
|
|
*/
|
|
if (given_dev_name != NULL)
|
|
strlcpy(device->given_dev_name, given_dev_name,
|
|
sizeof(device->given_dev_name));
|
|
else
|
|
device->given_dev_name[0] = '\0';
|
|
device->given_unit_number = given_unit_number;
|
|
|
|
if ((fd = open(path, flags)) < 0) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: couldn't open passthrough device %s\n"
|
|
"%s: %s", __func__, path, __func__,
|
|
strerror(errno));
|
|
goto crod_bailout;
|
|
}
|
|
|
|
device->fd = fd;
|
|
|
|
bzero(&ccb, sizeof(union ccb));
|
|
|
|
/*
|
|
* Unlike the transport layer version of the GETPASSTHRU ioctl,
|
|
* we don't have to set any fields.
|
|
*/
|
|
ccb.ccb_h.func_code = XPT_GDEVLIST;
|
|
|
|
/*
|
|
* We're only doing this to get some information on the device in
|
|
* question. Otherwise, we'd have to pass in yet another
|
|
* parameter: the passthrough driver unit number.
|
|
*/
|
|
if (ioctl(fd, CAMGETPASSTHRU, &ccb) == -1) {
|
|
/*
|
|
* At this point we know the passthrough device must exist
|
|
* because we just opened it above. The only way this
|
|
* ioctl can fail is if the ccb size is wrong.
|
|
*/
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: CAMGETPASSTHRU ioctl failed\n"
|
|
"%s: %s", __func__, __func__, strerror(errno));
|
|
goto crod_bailout;
|
|
}
|
|
|
|
/*
|
|
* If the ioctl returned the right status, but we got an error back
|
|
* in the ccb, that means that the kernel found the device the user
|
|
* passed in, but was unable to find the passthrough device for
|
|
* the device the user gave us.
|
|
*/
|
|
if (ccb.cgdl.status == CAM_GDEVLIST_ERROR) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: passthrough device does not exist!", __func__);
|
|
goto crod_bailout;
|
|
}
|
|
|
|
device->dev_unit_num = ccb.cgdl.unit_number;
|
|
strlcpy(device->device_name, ccb.cgdl.periph_name,
|
|
sizeof(device->device_name));
|
|
device->path_id = ccb.ccb_h.path_id;
|
|
device->target_id = ccb.ccb_h.target_id;
|
|
device->target_lun = ccb.ccb_h.target_lun;
|
|
|
|
ccb.ccb_h.func_code = XPT_PATH_INQ;
|
|
if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: Path Inquiry CCB failed\n"
|
|
"%s: %s", __func__, __func__, strerror(errno));
|
|
goto crod_bailout;
|
|
}
|
|
strlcpy(device->sim_name, ccb.cpi.dev_name, sizeof(device->sim_name));
|
|
device->sim_unit_number = ccb.cpi.unit_number;
|
|
device->bus_id = ccb.cpi.bus_id;
|
|
|
|
/*
|
|
* It doesn't really matter what is in the payload for a getdev
|
|
* CCB, the kernel doesn't look at it.
|
|
*/
|
|
ccb.ccb_h.func_code = XPT_GDEV_TYPE;
|
|
if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: Get Device Type CCB failed\n"
|
|
"%s: %s", __func__, __func__, strerror(errno));
|
|
goto crod_bailout;
|
|
}
|
|
device->pd_type = SID_TYPE(&ccb.cgd.inq_data);
|
|
bcopy(&ccb.cgd.inq_data, &device->inq_data,
|
|
sizeof(struct scsi_inquiry_data));
|
|
device->serial_num_len = ccb.cgd.serial_num_len;
|
|
bcopy(&ccb.cgd.serial_num, &device->serial_num, device->serial_num_len);
|
|
|
|
/*
|
|
* Zero the payload, the kernel does look at the flags.
|
|
*/
|
|
CCB_CLEAR_ALL_EXCEPT_HDR(&ccb.cts);
|
|
|
|
/*
|
|
* Get transfer settings for this device.
|
|
*/
|
|
ccb.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
|
|
|
|
ccb.cts.type = CTS_TYPE_CURRENT_SETTINGS;
|
|
|
|
if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: Get Transfer Settings CCB failed\n"
|
|
"%s: %s", __func__, __func__, strerror(errno));
|
|
goto crod_bailout;
|
|
}
|
|
if (ccb.cts.transport == XPORT_SPI) {
|
|
struct ccb_trans_settings_spi *spi =
|
|
&ccb.cts.xport_specific.spi;
|
|
device->sync_period = spi->sync_period;
|
|
device->sync_offset = spi->sync_offset;
|
|
device->bus_width = spi->bus_width;
|
|
} else {
|
|
device->sync_period = 0;
|
|
device->sync_offset = 0;
|
|
device->bus_width = 0;
|
|
}
|
|
|
|
return(device);
|
|
|
|
crod_bailout:
|
|
|
|
if (fd >= 0)
|
|
close(fd);
|
|
|
|
if (malloced_device)
|
|
free(device);
|
|
|
|
return(NULL);
|
|
}
|
|
|
|
void
|
|
cam_close_device(struct cam_device *dev)
|
|
{
|
|
if (dev == NULL)
|
|
return;
|
|
|
|
cam_close_spec_device(dev);
|
|
|
|
free(dev);
|
|
}
|
|
|
|
void
|
|
cam_close_spec_device(struct cam_device *dev)
|
|
{
|
|
if (dev == NULL)
|
|
return;
|
|
|
|
if (dev->fd >= 0) {
|
|
close(dev->fd);
|
|
dev->fd = -1;
|
|
}
|
|
}
|
|
|
|
char *
|
|
cam_path_string(struct cam_device *dev, char *str, int len)
|
|
{
|
|
if (dev == NULL) {
|
|
snprintf(str, len, "No path");
|
|
return(str);
|
|
}
|
|
|
|
snprintf(str, len, "(%s%d:%s%d:%d:%d:%jx): ",
|
|
(dev->device_name[0] != '\0') ? dev->device_name : "pass",
|
|
dev->dev_unit_num,
|
|
(dev->sim_name[0] != '\0') ? dev->sim_name : "unknown",
|
|
dev->sim_unit_number,
|
|
dev->bus_id,
|
|
dev->target_id,
|
|
(uintmax_t)dev->target_lun);
|
|
|
|
return(str);
|
|
}
|
|
|
|
/*
|
|
* Malloc/duplicate a CAM device structure.
|
|
*/
|
|
struct cam_device *
|
|
cam_device_dup(struct cam_device *device)
|
|
{
|
|
struct cam_device *newdev;
|
|
|
|
if (device == NULL) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: device is NULL", __func__);
|
|
return (NULL);
|
|
}
|
|
|
|
newdev = malloc(sizeof(struct cam_device));
|
|
if (newdev == NULL) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: couldn't malloc CAM device structure", __func__);
|
|
return (NULL);
|
|
}
|
|
|
|
bcopy(device, newdev, sizeof(struct cam_device));
|
|
|
|
return(newdev);
|
|
}
|
|
|
|
/*
|
|
* Copy a CAM device structure.
|
|
*/
|
|
void
|
|
cam_device_copy(struct cam_device *src, struct cam_device *dst)
|
|
{
|
|
|
|
if (src == NULL) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: source device struct was NULL", __func__);
|
|
return;
|
|
}
|
|
|
|
if (dst == NULL) {
|
|
snprintf(cam_errbuf, nitems(cam_errbuf),
|
|
"%s: destination device struct was NULL", __func__);
|
|
return;
|
|
}
|
|
|
|
bcopy(src, dst, sizeof(struct cam_device));
|
|
|
|
}
|