| Current Path : /usr/src/usr.sbin/mptutil/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/usr.sbin/mptutil/mpt_cam.c |
/*-
* Copyright (c) 2008 Yahoo!, Inc.
* All rights reserved.
* Written by: John Baldwin <jhb@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$FreeBSD: release/9.1.0/usr.sbin/mptutil/mpt_cam.c 215046 2010-11-09 19:28:06Z jhb $");
#include <sys/param.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <camlib.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_pass.h>
#include "mptutil.h"
static int xptfd;
static int
xpt_open(void)
{
if (xptfd == 0)
xptfd = open(XPT_DEVICE, O_RDWR);
return (xptfd);
}
/* Fetch the path id of bus 0 for the opened mpt controller. */
static int
fetch_path_id(path_id_t *path_id)
{
struct bus_match_pattern *b;
union ccb ccb;
size_t bufsize;
int error;
if (xpt_open() < 0)
return (ENXIO);
/* First, find the path id of bus 0 for this mpt controller. */
bzero(&ccb, sizeof(ccb));
ccb.ccb_h.func_code = XPT_DEV_MATCH;
bufsize = sizeof(struct dev_match_result) * 1;
ccb.cdm.num_matches = 0;
ccb.cdm.match_buf_len = bufsize;
ccb.cdm.matches = calloc(1, bufsize);
bufsize = sizeof(struct dev_match_pattern) * 1;
ccb.cdm.num_patterns = 1;
ccb.cdm.pattern_buf_len = bufsize;
ccb.cdm.patterns = calloc(1, bufsize);
/* Match mptX bus 0. */
ccb.cdm.patterns[0].type = DEV_MATCH_BUS;
b = &ccb.cdm.patterns[0].pattern.bus_pattern;
snprintf(b->dev_name, sizeof(b->dev_name), "mpt");
b->unit_number = mpt_unit;
b->bus_id = 0;
b->flags = BUS_MATCH_NAME | BUS_MATCH_UNIT | BUS_MATCH_BUS_ID;
if (ioctl(xptfd, CAMIOCOMMAND, &ccb) < 0) {
error = errno;
free(ccb.cdm.matches);
free(ccb.cdm.patterns);
return (error);
}
free(ccb.cdm.patterns);
if (((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) ||
(ccb.cdm.status != CAM_DEV_MATCH_LAST)) {
warnx("fetch_path_id got CAM error %#x, CDM error %d\n",
ccb.ccb_h.status, ccb.cdm.status);
free(ccb.cdm.matches);
return (EIO);
}
/* We should have exactly 1 match for the bus. */
if (ccb.cdm.num_matches != 1 ||
ccb.cdm.matches[0].type != DEV_MATCH_BUS) {
free(ccb.cdm.matches);
return (ENOENT);
}
*path_id = ccb.cdm.matches[0].result.bus_result.path_id;
free(ccb.cdm.matches);
return (0);
}
int
mpt_query_disk(U8 VolumeBus, U8 VolumeID, struct mpt_query_disk *qd)
{
struct periph_match_pattern *p;
struct periph_match_result *r;
union ccb ccb;
path_id_t path_id;
size_t bufsize;
int error;
/* mpt(4) only handles devices on bus 0. */
if (VolumeBus != 0)
return (ENXIO);
if (xpt_open() < 0)
return (ENXIO);
/* Find the path ID of bus 0. */
error = fetch_path_id(&path_id);
if (error)
return (error);
bzero(&ccb, sizeof(ccb));
ccb.ccb_h.func_code = XPT_DEV_MATCH;
ccb.ccb_h.path_id = CAM_XPT_PATH_ID;
ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;
bufsize = sizeof(struct dev_match_result) * 5;
ccb.cdm.num_matches = 0;
ccb.cdm.match_buf_len = bufsize;
ccb.cdm.matches = calloc(1, bufsize);
bufsize = sizeof(struct dev_match_pattern) * 1;
ccb.cdm.num_patterns = 1;
ccb.cdm.pattern_buf_len = bufsize;
ccb.cdm.patterns = calloc(1, bufsize);
/* Look for a "da" device at the specified target and lun. */
ccb.cdm.patterns[0].type = DEV_MATCH_PERIPH;
p = &ccb.cdm.patterns[0].pattern.periph_pattern;
p->path_id = path_id;
snprintf(p->periph_name, sizeof(p->periph_name), "da");
p->target_id = VolumeID;
p->flags = PERIPH_MATCH_PATH | PERIPH_MATCH_NAME | PERIPH_MATCH_TARGET;
if (ioctl(xptfd, CAMIOCOMMAND, &ccb) < 0) {
error = errno;
free(ccb.cdm.matches);
free(ccb.cdm.patterns);
return (error);
}
free(ccb.cdm.patterns);
if (((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) ||
(ccb.cdm.status != CAM_DEV_MATCH_LAST)) {
warnx("mpt_query_disk got CAM error %#x, CDM error %d\n",
ccb.ccb_h.status, ccb.cdm.status);
free(ccb.cdm.matches);
return (EIO);
}
/*
* We should have exactly 1 match for the peripheral.
* However, if we don't get a match, don't print an error
* message and return ENOENT.
*/
if (ccb.cdm.num_matches == 0) {
free(ccb.cdm.matches);
return (ENOENT);
}
if (ccb.cdm.num_matches != 1) {
warnx("mpt_query_disk got %d matches, expected 1",
ccb.cdm.num_matches);
free(ccb.cdm.matches);
return (EIO);
}
if (ccb.cdm.matches[0].type != DEV_MATCH_PERIPH) {
warnx("mpt_query_disk got wrong CAM match");
free(ccb.cdm.matches);
return (EIO);
}
/* Copy out the data. */
r = &ccb.cdm.matches[1].result.periph_result;
snprintf(qd->devname, sizeof(qd->devname), "%s%d", r->periph_name,
r->unit_number);
free(ccb.cdm.matches);
return (0);
}
static int
periph_is_volume(CONFIG_PAGE_IOC_2 *ioc2, struct periph_match_result *r)
{
CONFIG_PAGE_IOC_2_RAID_VOL *vol;
int i;
if (ioc2 == NULL)
return (0);
vol = ioc2->RaidVolume;
for (i = 0; i < ioc2->NumActiveVolumes; vol++, i++) {
if (vol->VolumeBus == 0 && vol->VolumeID == r->target_id)
return (1);
}
return (0);
}
/* Much borrowed from scsireadcapacity() in src/sbin/camcontrol/camcontrol.c. */
static int
fetch_scsi_capacity(struct cam_device *dev, struct mpt_standalone_disk *disk)
{
struct scsi_read_capacity_data rcap;
struct scsi_read_capacity_data_long rcaplong;
union ccb *ccb;
int error;
ccb = cam_getccb(dev);
if (ccb == NULL)
return (ENOMEM);
/* Zero the rest of the ccb. */
bzero(&(&ccb->ccb_h)[1], sizeof(struct ccb_scsiio) -
sizeof(struct ccb_hdr));
scsi_read_capacity(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG, &rcap,
SSD_FULL_SIZE, 5000);
/* Disable freezing the device queue */
ccb->ccb_h.flags |= CAM_DEV_QFRZDIS;
if (cam_send_ccb(dev, ccb) < 0) {
error = errno;
cam_freeccb(ccb);
return (error);
}
if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
cam_freeccb(ccb);
return (EIO);
}
cam_freeccb(ccb);
/*
* A last block of 2^32-1 means that the true capacity is over 2TB,
* and we need to issue the long READ CAPACITY to get the real
* capacity. Otherwise, we're all set.
*/
if (scsi_4btoul(rcap.addr) != 0xffffffff) {
disk->maxlba = scsi_4btoul(rcap.addr);
return (0);
}
/* Zero the rest of the ccb. */
bzero(&(&ccb->ccb_h)[1], sizeof(struct ccb_scsiio) -
sizeof(struct ccb_hdr));
scsi_read_capacity_16(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG, 0, 0, 0,
&rcaplong, SSD_FULL_SIZE, 5000);
/* Disable freezing the device queue */
ccb->ccb_h.flags |= CAM_DEV_QFRZDIS;
if (cam_send_ccb(dev, ccb) < 0) {
error = errno;
cam_freeccb(ccb);
return (error);
}
if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
cam_freeccb(ccb);
return (EIO);
}
cam_freeccb(ccb);
disk->maxlba = scsi_8btou64(rcaplong.addr);
return (0);
}
/* Borrowed heavily from scsi_all.c:scsi_print_inquiry(). */
static void
format_scsi_inquiry(struct mpt_standalone_disk *disk,
struct scsi_inquiry_data *inq_data)
{
char vendor[16], product[48], revision[16], rstr[12];
if (SID_QUAL_IS_VENDOR_UNIQUE(inq_data))
return;
if (SID_TYPE(inq_data) != T_DIRECT)
return;
if (SID_QUAL(inq_data) != SID_QUAL_LU_CONNECTED)
return;
cam_strvis(vendor, inq_data->vendor, sizeof(inq_data->vendor),
sizeof(vendor));
cam_strvis(product, inq_data->product, sizeof(inq_data->product),
sizeof(product));
cam_strvis(revision, inq_data->revision, sizeof(inq_data->revision),
sizeof(revision));
/* Hack for SATA disks, no idea how to tell speed. */
if (strcmp(vendor, "ATA") == 0) {
snprintf(disk->inqstring, sizeof(disk->inqstring),
"<%s %s> SATA", product, revision);
return;
}
switch (SID_ANSI_REV(inq_data)) {
case SCSI_REV_CCS:
strcpy(rstr, "SCSI-CCS");
break;
case 5:
strcpy(rstr, "SAS");
break;
default:
snprintf(rstr, sizeof (rstr), "SCSI-%d",
SID_ANSI_REV(inq_data));
break;
}
snprintf(disk->inqstring, sizeof(disk->inqstring), "<%s %s %s> %s",
vendor, product, revision, rstr);
}
/* Much borrowed from scsiinquiry() in src/sbin/camcontrol/camcontrol.c. */
static int
fetch_scsi_inquiry(struct cam_device *dev, struct mpt_standalone_disk *disk)
{
struct scsi_inquiry_data *inq_buf;
union ccb *ccb;
int error;
ccb = cam_getccb(dev);
if (ccb == NULL)
return (ENOMEM);
/* Zero the rest of the ccb. */
bzero(&(&ccb->ccb_h)[1], sizeof(struct ccb_scsiio) -
sizeof(struct ccb_hdr));
inq_buf = calloc(1, sizeof(*inq_buf));
if (inq_buf == NULL) {
cam_freeccb(ccb);
return (ENOMEM);
}
scsi_inquiry(&ccb->csio, 1, NULL, MSG_SIMPLE_Q_TAG, (void *)inq_buf,
SHORT_INQUIRY_LENGTH, 0, 0, SSD_FULL_SIZE, 5000);
/* Disable freezing the device queue */
ccb->ccb_h.flags |= CAM_DEV_QFRZDIS;
if (cam_send_ccb(dev, ccb) < 0) {
error = errno;
free(inq_buf);
cam_freeccb(ccb);
return (error);
}
if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
free(inq_buf);
cam_freeccb(ccb);
return (EIO);
}
cam_freeccb(ccb);
format_scsi_inquiry(disk, inq_buf);
free(inq_buf);
return (0);
}
int
mpt_fetch_disks(int fd, int *ndisks, struct mpt_standalone_disk **disksp)
{
CONFIG_PAGE_IOC_2 *ioc2;
struct mpt_standalone_disk *disks;
struct periph_match_pattern *p;
struct periph_match_result *r;
struct cam_device *dev;
union ccb ccb;
path_id_t path_id;
size_t bufsize;
int count, error;
uint32_t i;
if (xpt_open() < 0)
return (ENXIO);
error = fetch_path_id(&path_id);
if (error)
return (error);
for (count = 100;; count+= 100) {
/* Try to fetch 'count' disks in one go. */
bzero(&ccb, sizeof(ccb));
ccb.ccb_h.func_code = XPT_DEV_MATCH;
bufsize = sizeof(struct dev_match_result) * (count + 1);
ccb.cdm.num_matches = 0;
ccb.cdm.match_buf_len = bufsize;
ccb.cdm.matches = calloc(1, bufsize);
bufsize = sizeof(struct dev_match_pattern) * 1;
ccb.cdm.num_patterns = 1;
ccb.cdm.pattern_buf_len = bufsize;
ccb.cdm.patterns = calloc(1, bufsize);
/* Match any "da" peripherals. */
ccb.cdm.patterns[0].type = DEV_MATCH_PERIPH;
p = &ccb.cdm.patterns[0].pattern.periph_pattern;
p->path_id = path_id;
snprintf(p->periph_name, sizeof(p->periph_name), "da");
p->flags = PERIPH_MATCH_PATH | PERIPH_MATCH_NAME;
if (ioctl(xptfd, CAMIOCOMMAND, &ccb) < 0) {
error = errno;
free(ccb.cdm.matches);
free(ccb.cdm.patterns);
return (error);
}
free(ccb.cdm.patterns);
/* Check for CCB errors. */
if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
free(ccb.cdm.matches);
return (EIO);
}
/* If we need a longer list, try again. */
if (ccb.cdm.status == CAM_DEV_MATCH_MORE) {
free(ccb.cdm.matches);
continue;
}
/* If we got an error, abort. */
if (ccb.cdm.status != CAM_DEV_MATCH_LAST) {
free(ccb.cdm.matches);
return (EIO);
}
break;
}
/* Shortcut if we don't have any "da" devices. */
if (ccb.cdm.num_matches == 0) {
free(ccb.cdm.matches);
*ndisks = 0;
*disksp = NULL;
return (0);
}
/* We should have N matches, 1 for each "da" device. */
for (i = 0; i < ccb.cdm.num_matches; i++) {
if (ccb.cdm.matches[i].type != DEV_MATCH_PERIPH) {
warnx("mpt_fetch_disks got wrong CAM matches");
free(ccb.cdm.matches);
return (EIO);
}
}
/*
* Some of the "da" peripherals may be for RAID volumes, so
* fetch the IOC 2 page (list of RAID volumes) so we can
* exclude them from the list.
*/
ioc2 = mpt_read_ioc_page(fd, 2, NULL);
if (ioc2 == NULL)
return (errno);
disks = calloc(ccb.cdm.num_matches, sizeof(*disks));
count = 0;
for (i = 0; i < ccb.cdm.num_matches; i++) {
r = &ccb.cdm.matches[i].result.periph_result;
if (periph_is_volume(ioc2, r))
continue;
disks[count].bus = 0;
disks[count].target = r->target_id;
snprintf(disks[count].devname, sizeof(disks[count].devname),
"%s%d", r->periph_name, r->unit_number);
dev = cam_open_device(disks[count].devname, O_RDWR);
if (dev != NULL) {
fetch_scsi_capacity(dev, &disks[count]);
fetch_scsi_inquiry(dev, &disks[count]);
cam_close_device(dev);
}
count++;
}
free(ccb.cdm.matches);
free(ioc2);
*ndisks = count;
*disksp = disks;
return (0);
}
/*
* Instruct the mpt(4) device to rescan its busses to find new devices
* such as disks whose RAID physdisk page was removed or volumes that
* were created. If id is -1, the entire bus is rescanned.
* Otherwise, only devices at the specified ID are rescanned. If bus
* is -1, then all busses are scanned instead of the specified bus.
* Note that currently, only bus 0 is supported.
*/
int
mpt_rescan_bus(int bus, int id)
{
union ccb ccb;
path_id_t path_id;
int error;
/* mpt(4) only handles devices on bus 0. */
if (bus != -1 && bus != 0)
return (EINVAL);
if (xpt_open() < 0)
return (ENXIO);
error = fetch_path_id(&path_id);
if (error)
return (error);
/* Perform the actual rescan. */
bzero(&ccb, sizeof(ccb));
ccb.ccb_h.path_id = path_id;
if (id == -1) {
ccb.ccb_h.func_code = XPT_SCAN_BUS;
ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;
ccb.ccb_h.timeout = 5000;
} else {
ccb.ccb_h.func_code = XPT_SCAN_LUN;
ccb.ccb_h.target_id = id;
ccb.ccb_h.target_lun = 0;
}
ccb.crcn.flags = CAM_FLAG_NONE;
/* Run this at a low priority. */
ccb.ccb_h.pinfo.priority = 5;
if (ioctl(xptfd, CAMIOCOMMAND, &ccb) == -1)
return (errno);
if ((ccb.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
warnx("mpt_rescan_bus rescan got CAM error %#x\n",
ccb.ccb_h.status & CAM_STATUS_MASK);
return (EIO);
}
return (0);
}