xref: /illumos-gate/usr/src/cmd/fwflash/plugins/transport/common/sd.c (revision d65b419e)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * sd / ssd (SCSI Direct-attached Device) specific functions.
 */
#include <libnvpair.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
#include <sys/queue.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <scsi/libscsi.h>
#include <libintl.h> /* for gettext(3c) */
#include <fwflash/fwflash.h>

typedef struct sam4_statdesc {
	int status;
	char *message;
} sam4_statdesc_t;

static sam4_statdesc_t sam4_status[] = {
	{ SAM4_STATUS_GOOD, "Status: GOOD (success)" },
	{ SAM4_STATUS_CHECK_CONDITION, "Status: CHECK CONDITION" },
	{ SAM4_STATUS_CONDITION_MET, "Status: CONDITION MET" },
	{ SAM4_STATUS_BUSY, "Status: Device is BUSY" },
	{ SAM4_STATUS_RESERVATION_CONFLICT, "Status: Device is RESERVED" },
	{ SAM4_STATUS_TASK_SET_FULL,
	    "Status: TASK SET FULL (insufficient resources in command queue" },
	{ SAM4_STATUS_TASK_ABORTED, "Status: TASK ABORTED" },
	{ NULL, NULL }
};

#define	NSAM4_STATUS	\
	(sizeof (sam4_status) / sizeof (sam4_status[0]))

#define	FW_SD_FREE_DEVPATH(devpath)	{	\
		di_devfs_path_free((devpath));	\
	}
#define	FW_SD_FREE_DEVICELIST(thisdev, devpath) {	\
		free((thisdev));	\
		FW_SD_FREE_DEVPATH((devpath))	\
	}
#define	FW_SD_FREE_ACC_NAME(thisdev, devpath) {	\
		free((thisdev)->access_devname);	\
		FW_SD_FREE_DEVICELIST(thisdev, devpath)	\
	}
#define	FW_SD_FREE_DRV_NAME(thisdev, devpath) {	\
		free((thisdev)->drvname);	\
		FW_SD_FREE_ACC_NAME((thisdev), (devpath))	\
	}
#define	FW_SD_FREE_CLS_NAME(thisdev, devpath) {	\
		free((thisdev)->classname);	\
		FW_SD_FREE_DRV_NAME((thisdev), (devpath))	\
	}
#define	FW_SD_FREE_IDENT(thisdev, devpath) {	\
		free((thisdev)->ident);	\
		FW_SD_FREE_CLS_NAME((thisdev), (devpath))	\
	}
#define	FW_SD_FREE_IDENT_VID(thisdev, devpath) {	\
		free((thisdev)->ident->vid);	\
		FW_SD_FREE_IDENT((thisdev), (devpath))	\
	}
#define	FW_SD_FREE_IDENT_PID(thisdev, devpath) {	\
		free((thisdev)->ident->pid);	\
		FW_SD_FREE_IDENT_VID((thisdev), (devpath))	\
	}
#define	FW_SD_FREE_IDENT_ALL(thisdev, devpath) {	\
		free((thisdev)->ident->revid);	\
		FW_SD_FREE_IDENT_PID((thisdev), (devpath))	\
	}

int errno;
char drivername[] = "sd\0";
int plugin_version = FWPLUGIN_VERSION_2;

static char *devprefix = "/devices";
extern di_node_t rootnode;
extern struct fw_plugin *self;
extern struct vrfyplugin *verifier;
extern int fwflash_debug;

/* required functions for this plugin */
int fw_readfw(struct devicelist *device, char *filename);
int fw_writefw(struct devicelist *device);
int fw_identify(int start);
int fw_devinfo(struct devicelist *thisdev);
void fw_cleanup(struct devicelist *thisdev);

/* helper functions */
static char *find_link(di_node_t bnode);
static int link_cb(di_devlink_t devlink, void *arg);
static int sd_idtfy_custmz(struct devicelist *device, char *sp);

/*
 * We don't currently support reading firmware from a disk. If we do eventually
 * support it, we would use the scsi READ BUFFER command to do so.
 */
int
fw_readfw(struct devicelist *flashdev, char *filename)
{

	logmsg(MSG_INFO,
	    "%s: not writing firmware for device %s to file %s\n",
	    flashdev->drvname, flashdev->access_devname, filename);
	logmsg(MSG_ERROR,
	    gettext("\n\nReading of firmware images from %s-attached "
	    "devices is not supported\n\n"),
	    flashdev->drvname);

	return (FWFLASH_SUCCESS);
}

int
fw_writefw(struct devicelist *flashdev)
{
	int rv;
	int i = 0;
	libscsi_hdl_t	*handle;
	libscsi_target_t *target;
	libscsi_action_t *action;
	libscsi_errno_t serr;
	spc3_write_buffer_cdb_t *wb_cdb;
	sam4_status_t samstatus;

	if ((verifier == NULL) || (verifier->imgsize == 0) ||
	    (verifier->fwimage == NULL)) {
		/* should _NOT_ happen */
		logmsg(MSG_ERROR,
		    gettext("%s: Firmware image has not been verified\n"),
		    flashdev->drvname);
		return (FWFLASH_FAILURE);
	}

	if ((handle = libscsi_init(LIBSCSI_VERSION, &serr)) == NULL) {
		logmsg(MSG_ERROR, gettext("%s: failed to initialize libscsi\n"),
		    flashdev->drvname);
		return (FWFLASH_FAILURE);
	}

	if ((target = libscsi_open(handle, NULL, flashdev->access_devname))
	    == NULL) {
		logmsg(MSG_ERROR,
		    gettext("%s: unable to open device %s\n"),
		    flashdev->drvname, flashdev->access_devname);
		libscsi_fini(handle);
		return (FWFLASH_FAILURE);
	}

	action = libscsi_action_alloc(handle, SPC3_CMD_WRITE_BUFFER,
	    LIBSCSI_AF_WRITE|LIBSCSI_AF_RQSENSE,
	    (void *)verifier->fwimage, (size_t)verifier->imgsize);

	wb_cdb = (spc3_write_buffer_cdb_t *)libscsi_action_get_cdb(action);

	wb_cdb->wbc_mode = SPC3_WB_MODE_DL_UCODE_SAVE;
	wb_cdb->wbc_bufferid = verifier->flashbuf;

	wb_cdb->wbc_buffer_offset[0] = 0;
	wb_cdb->wbc_buffer_offset[1] = 0;
	wb_cdb->wbc_buffer_offset[2] = 0;

	wb_cdb->wbc_parameter_list_len[0] =
	    (verifier->imgsize & 0xff0000) >> 16;
	wb_cdb->wbc_parameter_list_len[1] = (verifier->imgsize & 0xff00) >> 8;
	wb_cdb->wbc_parameter_list_len[2] = (verifier->imgsize & 0xff);

	rv = libscsi_exec(action, target);
	samstatus = libscsi_action_get_status(action);

	logmsg(MSG_INFO, "\nscsi_writebuffer: ret 0x%0x, samstatus 0x%0x\n",
	    rv, samstatus);

	libscsi_action_free(action);
	libscsi_close(handle, target);
	libscsi_fini(handle);

	if (rv != FWFLASH_SUCCESS)
		return (FWFLASH_FAILURE);

	for (i = 0; i < NSAM4_STATUS; i++) {
		if (sam4_status[i].status == samstatus) {
			logmsg(MSG_ERROR, gettext("RETURN STATUS: %s\n"),
			    (sam4_status[i].message));
			break;
		}
	}
	if (i == NSAM4_STATUS)
		logmsg(MSG_ERROR, gettext("Status UNKNOWN\n"));

	if (samstatus == SAM4_STATUS_GOOD) {
		logmsg(MSG_ERROR, gettext("Note: For flash based disks "
		    "(SSD, etc). You may need power off the system to wait a "
		    "few minutes for supercap to fully discharge, then power "
		    "on the system again to activate the new firmware\n"));
		return (FWFLASH_SUCCESS);
	}
	return (FWFLASH_FAILURE);
}

/*
 * The fw_identify() function walks the device
 * tree trying to find devices which this plugin
 * can work with.
 *
 * The parameter "start" gives us the starting index number
 * to give the device when we add it to the fw_devices list.
 *
 * firstdev is allocated by us and we add space as needed
 *
 * When we store the desired information, inquiry-serial-no
 * goes in thisdev->addresses[1], and client-guid goes in
 * thisdev->addresses[2].
 */
int
fw_identify(int start)
{
	int idx = start;
	int fw_sata_disk = 0;
	int *exists;
	di_node_t thisnode;
	struct devicelist *newdev = NULL;
	char *devpath = NULL;
	char *driver = NULL;
	char *sp_temp;
	char *sp_temp_cut;

	/* We need to inquiry information manually by sending probe command */
	libscsi_hdl_t *handle;
	libscsi_target_t *target;
	libscsi_errno_t serr;

	/* Just in case we've got an FC-attached device on sparc */
	if (strcmp(self->drvname, "ssd") == 0) {
		driver = self->drvname;
	} else
		driver = drivername;

	thisnode = di_drv_first_node(driver, rootnode);

	if (thisnode == DI_NODE_NIL) {
		logmsg(MSG_INFO, "No %s nodes in this system\n", driver);
		return (FWFLASH_FAILURE);
	}

	if ((devpath = calloc(1, MAXPATHLEN + 1)) == NULL) {
		logmsg(MSG_ERROR,
		    gettext("%s: Unable to allocate space for a device node\n"),
		    driver);
		return (FWFLASH_FAILURE);
	}

	if ((handle = libscsi_init(LIBSCSI_VERSION, &serr)) == NULL) {
		logmsg(MSG_ERROR, gettext("%s: failed to initialize "
		    "libscsi\n"), newdev->drvname);
		FW_SD_FREE_DEVPATH(devpath)
		return (FWFLASH_FAILURE);
	}

	/* we've found one, at least */
	for (; thisnode != DI_NODE_NIL; thisnode = di_drv_next_node(thisnode)) {
		devpath = di_devfs_path(thisnode);
		/*
		 * We check if this is removable device, in which case
		 * we really aren't interested, so exit stage left
		 */
		if (di_prop_lookup_ints(DDI_DEV_T_ANY, thisnode,
		    "removable-media", &exists) > -1) {
			logmsg(MSG_INFO,
			    "%s: not interested in removable media device\n"
			    "%s\n", driver, devpath);
			continue;
		}

		if ((newdev = calloc(1, sizeof (struct devicelist)))
		    == NULL) {
			logmsg(MSG_ERROR,
			    gettext("%s: identification function unable "
			    "to allocate space for device entry\n"),
			    driver);
			libscsi_fini(handle);
			FW_SD_FREE_DEVPATH(devpath)
			return (FWFLASH_FAILURE);
		}

		if ((newdev->access_devname = calloc(1, MAXPATHLEN)) == NULL) {
			logmsg(MSG_ERROR,
			    gettext("%s: Unable to allocate space for a devfs "
			    "name\n"), driver);
			libscsi_fini(handle);
			FW_SD_FREE_DEVICELIST(newdev, devpath)
			return (FWFLASH_FAILURE);
		}

		/* save the /devices name */
		(void) snprintf(newdev->access_devname, MAXPATHLEN,
		    "%s%s:c,raw", devprefix, devpath);

		/* and the /dev/rdsk/ name */
		newdev->addresses[0] = calloc(1, MAXPATHLEN);
		if (newdev->addresses[0])
			newdev->addresses[0] = find_link(thisnode);
		if (newdev->addresses[0] == NULL) {
			libscsi_fini(handle);
			FW_SD_FREE_DEVICELIST(newdev, devpath)
			return (FWFLASH_FAILURE);
		}

		if ((newdev->drvname = calloc(1, strlen(driver) + 1))
		    == NULL) {
			logmsg(MSG_ERROR,
			    gettext("%s: Unable to allocate space to store a "
			    "driver name\n"), driver);
			libscsi_fini(handle);
			FW_SD_FREE_ACC_NAME(newdev, devpath)
			return (FWFLASH_FAILURE);
		}
		(void) strlcpy(newdev->drvname, driver, strlen(driver) + 1);

		if ((newdev->classname = calloc(1, strlen(driver) + 1))
		    == NULL) {
			logmsg(MSG_ERROR,
			    gettext("%s: Unable to allocate space for a class "
			    "name\n"), drivername);
			libscsi_fini(handle);
			FW_SD_FREE_DRV_NAME(newdev, devpath)
			return (FWFLASH_FAILURE);
		}
		(void) strlcpy(newdev->classname, driver, strlen(driver) + 1);

		/*
		 * Only alloc as much as we truly need, and DON'T forget
		 * that libdevinfo manages the memory!
		 */
		if ((newdev->ident = calloc(1, sizeof (struct vpr))) == NULL) {
			logmsg(MSG_ERROR,
			    gettext("%s: Unable to allocate space for SCSI "
			    "INQUIRY data\n"), driver);
			libscsi_fini(handle);
			FW_SD_FREE_CLS_NAME(newdev, devpath)
			return (FWFLASH_FAILURE);
		}

		/* We don't use new->ident->encap_ident currently */

		/* Retrive information by using libscsi */
		if ((target = libscsi_open(handle, NULL,
		    newdev->access_devname)) == NULL) {
			logmsg(MSG_INFO, "%s: unable to open device %s\n",
			    newdev->drvname, newdev->access_devname);
			FW_SD_FREE_IDENT(newdev, devpath)
			continue;
		}

		/* Vendor ID */
		sp_temp = (char *)libscsi_vendor(target);
		if (strncmp(sp_temp, "ATA", 3) == 0) {
			/* We need to do customize the output for SATA disks */
			fw_sata_disk = 1;
		} else {
			fw_sata_disk = 0;
			if ((newdev->ident->vid =
			    calloc(1, strlen(sp_temp) + 1)) == NULL ||
			    sp_temp == NULL) {
				if (!sp_temp) {
					logmsg(MSG_ERROR, gettext("%s: unable "
					    "to get vendor id of %s\n"),
					    newdev->drvname,
					    newdev->access_devname);
				} else {
					logmsg(MSG_ERROR, gettext("Memory "
					    "allocation failure\n"));
				}

				libscsi_close(handle, target);
				libscsi_fini(handle);
				FW_SD_FREE_IDENT(newdev, devpath)
				return (FWFLASH_FAILURE);
			}
			strlcpy(newdev->ident->vid, sp_temp,
			    strlen(sp_temp) + 1);
		}

		/* Product ID */
		sp_temp = (char *)libscsi_product(target);
		if (fw_sata_disk) {
			sp_temp_cut = strchr(sp_temp, ' ');
			if (!sp_temp_cut) {
				/* Customize strings for special SATA disks */
				if (sd_idtfy_custmz(newdev, sp_temp)
				    != FWFLASH_SUCCESS) {
					libscsi_close(handle, target);
					libscsi_fini(handle);
					FW_SD_FREE_IDENT(newdev, devpath)
					return (FWFLASH_FAILURE);
				}
			} else {
				/* The first string is vendor id */
				if ((newdev->ident->vid = calloc(1,
				    (sp_temp_cut - sp_temp + 1))) == NULL) {
					logmsg(MSG_ERROR, gettext("%s: unable "
					    "to get sata vendor id of %s\n"),
					    newdev->drvname,
					    newdev->access_devname);

					libscsi_close(handle, target);
					libscsi_fini(handle);
					FW_SD_FREE_IDENT(newdev, devpath)
					return (FWFLASH_FAILURE);
				}
				strlcpy(newdev->ident->vid, sp_temp,
				    sp_temp_cut - sp_temp + 1);

				/* The second string is product id */
				if ((newdev->ident->pid =
				    calloc(1, strlen(sp_temp) -
				    strlen(newdev->ident->vid))) == NULL) {
					logmsg(MSG_ERROR, gettext("%s: unable "
					    "to get sata product id of %s\n"),
					    newdev->drvname,
					    newdev->access_devname);

					libscsi_close(handle, target);
					libscsi_fini(handle);
					FW_SD_FREE_IDENT_VID(newdev, devpath)
					return (FWFLASH_FAILURE);
				}
				strlcpy(newdev->ident->pid, sp_temp_cut + 1,
				    strlen(sp_temp) -
				    strlen(newdev->ident->vid));
			}
		} else {
			if ((newdev->ident->pid =
			    calloc(1, strlen(sp_temp) + 1)) == NULL ||
			    sp_temp == NULL) {
				logmsg(MSG_ERROR, gettext("%s: unable to get "
				    "product id of %s\n"), newdev->drvname,
				    newdev->access_devname);
				FW_SD_FREE_IDENT_VID(newdev, devpath)
				libscsi_close(handle, target);
				libscsi_fini(handle);
				return (FWFLASH_FAILURE);
			}
			strlcpy(newdev->ident->pid, sp_temp,
			    strlen(sp_temp) + 1);
		}

		/* Revision ID */
		sp_temp = (char *)libscsi_revision(target);
		if ((newdev->ident->revid = calloc(1, strlen(sp_temp) + 1))
		    == NULL || sp_temp == NULL) {
			logmsg(MSG_ERROR, gettext("%s: unable to get revision "
			    "id of %s\n"), newdev->drvname,
			    newdev->access_devname);
			libscsi_close(handle, target);
			libscsi_fini(handle);
			FW_SD_FREE_IDENT_PID(newdev, devpath)
			return (FWFLASH_FAILURE);
		}
		strlcpy(newdev->ident->revid, sp_temp, strlen(sp_temp) + 1);

		/* Finish using libscsi */
		libscsi_close(handle, target);

		if (di_prop_lookup_strings(DDI_DEV_T_ANY, thisnode,
		    "inquiry-serial-no", &newdev->addresses[1]) < 0) {
			logmsg(MSG_INFO,
			    "%s: no inquiry-serial-no property for %s\n",
			    driver, newdev->access_devname);
			logmsg(MSG_INFO, "The errno is %d\n", errno);
		}

		if ((di_prop_lookup_strings(DDI_DEV_T_ANY, thisnode,
		    "client-guid", &newdev->addresses[2])) < 0) {
			logmsg(MSG_INFO,
			    "%s: no client-guid property "
			    "for device %s\n",
			    driver, newdev->access_devname);
			/* try fallback */
			if ((di_prop_lookup_strings(DDI_DEV_T_ANY, thisnode,
			    "guid", &newdev->addresses[2])) < 0) {
				logmsg(MSG_INFO,
				    "%s: no guid property for device %s\n",
				    driver, newdev->access_devname);
			}
		} else {
			logmsg(MSG_INFO,
			    "client-guid property: %s\n",
			    newdev->addresses[2]);
		}

		newdev->index = idx;
		++idx;
		newdev->plugin = self;

		TAILQ_INSERT_TAIL(fw_devices, newdev, nextdev);
	}
	libscsi_fini(handle);
	FW_SD_FREE_DEVPATH(devpath)

	/* Check if sd targets presented are all unflashable. */
	if (idx == start)
		return (FWFLASH_FAILURE);

	if (fwflash_debug != 0) {
		struct devicelist *tempdev;

		TAILQ_FOREACH(tempdev, fw_devices, nextdev) {
			logmsg(MSG_INFO, "%s:fw_identify:\n",
			    driver);
			logmsg(MSG_INFO,
			    "\ttempdev @ 0x%lx\n"
			    "\t\taccess_devname: %s\n"
			    "\t\tdrvname: %s\tclassname: %s\n"
			    "\t\tident->vid:   %s\n"
			    "\t\tident->pid:   %s\n"
			    "\t\tident->revid: %s\n"
			    "\t\tindex:	%d\n"
			    "\t\taddress[0]:   %s\n"
			    "\t\taddress[1]:   %s\n"
			    "\t\taddress[2]:   %s\n"
			    "\t\tplugin @ 0x%lx\n\n",
			    &tempdev,
			    tempdev->access_devname,
			    tempdev->drvname, newdev->classname,
			    tempdev->ident->vid,
			    tempdev->ident->pid,
			    tempdev->ident->revid,
			    tempdev->index,
			    tempdev->addresses[0],
			    (tempdev->addresses[1] ? tempdev->addresses[1] :
			    "(not supported)"),
			    (tempdev->addresses[2] ? tempdev->addresses[2] :
			    "(not supported)"),
			    &tempdev->plugin);
		}
	}
	return (FWFLASH_SUCCESS);
}

int
fw_devinfo(struct devicelist *thisdev)
{
	fprintf(stdout, gettext("Device[%d]\t\t\t%s\n"
	    "  Class [%s]\t\t\t%s\n"),
	    thisdev->index, thisdev->access_devname,
	    thisdev->classname, thisdev->addresses[0]);

	fprintf(stdout,
	    gettext(
	    "\tVendor\t\t\t: %s\n"
	    "\tProduct\t\t\t: %s\n"
	    "\tFirmware revision\t: %-s\n"
	    "\tInquiry Serial Number   : %-s\n"
	    "\tGUID\t\t\t: %s\n"),
	    thisdev->ident->vid,
	    thisdev->ident->pid,
	    thisdev->ident->revid,
	    (thisdev->addresses[1] ? thisdev->addresses[1] :
	    "(not supported)"),
	    (thisdev->addresses[2] ? thisdev->addresses[2] :
	    "(not supported)"));

	fprintf(stdout, "\n\n");

	return (FWFLASH_SUCCESS);
}

void
fw_cleanup(struct devicelist *thisdev)
{
	/*
	 * Function to clean up all the memory allocated
	 * by this plugin, for thisdev.
	 */
	free(thisdev->access_devname);
	free(thisdev->drvname);
	free(thisdev->classname);

	/*
	 * Note that we DO NOT free addresses[1,2] because _IF_
	 * these elements are valid, they are managed by libdevinfo
	 * and we didn't allocate any space for them.
	 */
	free(thisdev->addresses[0]);

	/* what this points to is freed in common code */
	thisdev->plugin = NULL;

	free(thisdev->ident->vid);
	free(thisdev->ident->pid);
	free(thisdev->ident->revid);

	thisdev->ident = NULL;
}

/*
 * Helper functions
 */
static int
link_cb(di_devlink_t devlink, void *arg)
{
	const char *result;

	result = di_devlink_path(devlink);
	if (result == NULL) {
		arg = (void *)"(null)";
	} else {
		(void) strlcpy(arg, result, strlen(result) + 1);
	}

	logmsg(MSG_INFO, "\nlink_cb::linkdata->resultstr = %s\n",
	    ((result != NULL) ? result : "(null)"));

	return (DI_WALK_CONTINUE);
}

static char *
find_link(di_node_t bnode)
{
	di_minor_t devminor = DI_MINOR_NIL;
	di_devlink_handle_t	hdl;
	char *devfspath = NULL;
	char *minorpath = NULL;
	char *cbresult = NULL;
	char linkname[] = "^rdsk/\0";

	devfspath = di_devfs_path(bnode);
	if (bnode == DI_NODE_NIL) {
		logmsg(MSG_ERROR,
		    gettext("find_link must be called with non-null "
		    "di_node_t\n"));
		FW_SD_FREE_DEVPATH(devfspath)
		return (NULL);
	}

	logmsg(MSG_INFO, "find_link: devfspath %s\n", devfspath);

	if (((cbresult = calloc(1, MAXPATHLEN)) == NULL) ||
	    ((minorpath = calloc(1, MAXPATHLEN)) == NULL)) {
		logmsg(MSG_ERROR, gettext("unable to allocate space for dev "
		    "link\n"));
		FW_SD_FREE_DEVPATH(devfspath)
		return (NULL);
	}

	devminor = di_minor_next(bnode, devminor);
	errno = 0;
	hdl = di_devlink_init(di_devfs_minor_path(devminor), DI_MAKE_LINK);
	if (hdl == NULL) {
		if (errno == EPERM || errno == EACCES) {
			logmsg(MSG_ERROR,
			    gettext("%s: You must be super-user to use this "
			    "plugin.\n"), drivername);
		} else {
			logmsg(MSG_ERROR,
			    gettext("unable to take devlink snapshot: %s\n"),
			    strerror(errno));
		}
		FW_SD_FREE_DEVPATH(devfspath)
		return (NULL);
	}

	(void) snprintf(minorpath, MAXPATHLEN, "%s:c,raw", devfspath);

	errno = 0;
	if (di_devlink_walk(hdl, linkname, minorpath, DI_PRIMARY_LINK,
	    (void *)cbresult, link_cb) < 0) {
		logmsg(MSG_ERROR,
		    gettext("Unable to walk devlink snapshot for %s: %s\n"),
		    minorpath, strerror(errno));
		FW_SD_FREE_DEVPATH(devfspath)
		return (NULL);
	}

	if (di_devlink_fini(&hdl) < 0) {
		logmsg(MSG_ERROR,
		    gettext("Unable to close devlink snapshot: %s\n"),
		    strerror(errno));
	}
	free(minorpath); /* don't need this now */
	FW_SD_FREE_DEVPATH(devfspath)

	logmsg(MSG_INFO, "cbresult: %s\n", cbresult);
	return (cbresult);
}

static int
sd_idtfy_custmz(struct devicelist *device, char *sp)
{
	/* vid customization */
	if (strncmp(sp, "ST", 2) == 0) {
		/* Customize retail Seagate disks */
		if ((device->ident->vid = strdup("SEAGATE")) == NULL) {
			return (FWFLASH_FAILURE);
		}
	} else if (strncmp(sp, "SSD", 3) == 0) {
		/* Customize retail INTEL disks */
		if ((device->ident->vid = strdup("INTEL")) == NULL) {
			return (FWFLASH_FAILURE);
		}
	} else {
		/* disks to do in the furture, fill 'ATA' first */
		if ((device->ident->vid = strdup("ATA")) == NULL) {
			return (FWFLASH_FAILURE);
		}
	}

	/* pid customization */
	if ((device->ident->pid = calloc(1, strlen(sp) + 1)) == NULL) {
		logmsg(MSG_ERROR, gettext("Unable to allocate space for "
		    "product id\n"));
		free(device->ident->vid);
		return (FWFLASH_FAILURE);
	}
	strlcpy(device->ident->pid, sp, strlen(sp) + 1);

	return (FWFLASH_SUCCESS);
}