dmake: do not set MAKEFLAGS=k

[unleashed/tickless.git] / usr / src / cmd / fwflash / plugins / transport / common / sd.c

/*
 * 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" },
        { 0, 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_DRV_NAME(thisdev, devpath) { \
                free((thisdev)->drvname);       \
                FW_SD_FREE_DEVICELIST((thisdev), (devpath))     \
        }
#define FW_SD_FREE_CLS_NAME(thisdev, devpath) { \
                free((thisdev)->classname);     \
                FW_SD_FREE_DRV_NAME((thisdev), (devpath))       \
        }
#define FW_SD_FREE_ACC_NAME(thisdev, devpath) { \
                free((thisdev)->access_devname);        \
                FW_SD_FREE_CLS_NAME(thisdev, devpath)   \
        }
#define FW_SD_FREE_ADDR(thisdev, devpath) {     \
                free((thisdev)->addresses[0]);  \
                FW_SD_FREE_ACC_NAME(thisdev, devpath)   \
        }
#define FW_SD_FREE_IDENT(thisdev, devpath) {    \
                free((thisdev)->ident); \
                FW_SD_FREE_ADDR((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, char *acc_devname);
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 ((handle = libscsi_init(LIBSCSI_VERSION, &serr)) == NULL) {
                logmsg(MSG_ERROR, gettext("%s: failed to initialize "
                    "libscsi\n"), newdev->drvname);
                return (FWFLASH_FAILURE);
        }

        /* we've found one, at least */
        for (; thisnode != DI_NODE_NIL; thisnode = di_drv_next_node(thisnode)) {
                /* Need to free by di_devfs_path_free */
                if ((devpath = di_devfs_path(thisnode)) == NULL) {
                        logmsg(MSG_INFO, "unable to get device path for "
                            "current node with errno %d\n", errno);
                        continue;
                }
                /*
                 * 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);
                        FW_SD_FREE_DEVPATH(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->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_DEVICELIST(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);

                /* Get the access name for current node */
                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_CLS_NAME(newdev, devpath)
                        return (FWFLASH_FAILURE);
                }

                /* The slice number may be 2 or 0, we will try 2 first */
                (void) snprintf(newdev->access_devname, MAXPATHLEN,
                    "%s%s:c,raw", devprefix, devpath);
                if ((target = libscsi_open(handle, NULL,
                    newdev->access_devname)) == NULL) {
                        /* try 0 for EFI label */
                        (void) snprintf(newdev->access_devname, MAXPATHLEN,
                            "%s%s:a,raw", devprefix, devpath);
                        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_ACC_NAME(newdev, devpath)
                                continue;
                        }
                }

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

                /*
                 * 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_ADDR(newdev, devpath)
                        return (FWFLASH_FAILURE);
                }

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

                /* Retrive information by using libscsi */
                /* 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) {
                                /*
                                 * There is no SPACE character in the PID field
                                 * 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);
                FW_SD_FREE_DEVPATH(devpath)
        }
        libscsi_fini(handle);

        /* 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, char *acc_devname)
{
        di_minor_t devminor = DI_MINOR_NIL;
        di_devlink_handle_t hdl;
        char *cbresult = NULL;
        char linkname[] = "^rdsk/\0";

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

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

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

        if (di_devlink_fini(&hdl) < 0) {
                logmsg(MSG_ERROR,
                    gettext("Unable to close devlink snapshot: %s\n"),
                    strerror(errno));
        }

        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);
}