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/*
* 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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/scsi/scsi_address.h>
#include <sys/scsi/impl/usmp.h>
#include <sys/libdevid.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <strings.h>
#include <stdio.h>
#include <limits.h>
#include <scsi/libsmp.h>
#include <scsi/libsmp_plugin.h>
#include <libdevinfo.h>
struct usmp_dev {
int ud_fd;
char *ud_dev;
uint64_t ud_addr;
};
struct di_walk_arg {
dev_t dev;
uint64_t addr;
};
static int
di_walk(di_node_t node, di_minor_t minor, void *arg)
{
struct di_walk_arg *wp = arg;
char *wwn;
if (di_minor_spectype(minor) != S_IFCHR)
return (DI_WALK_CONTINUE);
if (di_minor_devt(minor) == wp->dev) {
if (di_prop_lookup_strings(DDI_DEV_T_ANY, node,
SCSI_ADDR_PROP_TARGET_PORT, &wwn) != 1 &&
di_prop_lookup_strings(DDI_DEV_T_ANY, node,
"smp-wwn", &wwn) != 1)
return (DI_WALK_CONTINUE);
if (scsi_wwnstr_to_wwn(wwn, &wp->addr) != DDI_SUCCESS)
return (DI_WALK_CONTINUE);
return (DI_WALK_TERMINATE);
}
return (DI_WALK_CONTINUE);
}
static void *
usmp_open(const void *target)
{
struct usmp_dev *dp;
const char *target_name = (const char *)target;
struct stat64 st;
di_node_t root, smp;
struct di_walk_arg walk;
if ((dp = smp_zalloc(sizeof (struct usmp_dev))) == NULL)
return (NULL);
if ((dp->ud_dev = smp_strdup(target_name)) == NULL) {
smp_free(dp);
return (NULL);
}
if ((dp->ud_fd = open(target_name, O_RDONLY)) < 0) {
(void) smp_error(ESMP_BADTARGET,
"failed to open %s for reading: %s",
target_name, strerror(errno));
smp_free(dp->ud_dev);
smp_free(dp);
return (NULL);
}
if (fstat64(dp->ud_fd, &st) != 0) {
(void) smp_error(ESMP_BADTARGET,
"failed to stat %s: %s", target_name, strerror(errno));
(void) close(dp->ud_fd);
smp_free(dp->ud_dev);
smp_free(dp);
return (NULL);
}
if ((root = di_init("/", DINFOCACHE)) != DI_NODE_NIL) {
for (smp = di_drv_first_node("smp", root); smp != DI_NODE_NIL;
smp = di_drv_next_node(smp)) {
bzero(&walk, sizeof (walk));
walk.dev = st.st_rdev;
(void) di_walk_minor(smp, NULL, 0, &walk, di_walk);
if (walk.addr != 0) {
dp->ud_addr = walk.addr;
break;
}
}
di_fini(root);
}
return (dp);
}
static void
usmp_close(void *private)
{
struct usmp_dev *dp = (struct usmp_dev *)private;
if (dp == NULL)
return;
if (dp->ud_fd > 0)
(void) close(dp->ud_fd);
smp_free(dp->ud_dev);
smp_free(dp);
}
static int
usmp_exec(void *private, smp_action_t *ap)
{
struct usmp_dev *dp = (struct usmp_dev *)private;
struct usmp_cmd cmd;
void *req, *resp;
size_t reqlen, resplen;
bzero(&cmd, sizeof (cmd));
smp_action_get_request_frame(ap, &req, &reqlen);
smp_action_get_response_frame(ap, &resp, &resplen);
ASSERT(req != NULL);
ASSERT(resp != NULL);
ASSERT(reqlen != 0);
ASSERT(resplen != 0);
cmd.usmp_req = req;
cmd.usmp_reqsize = reqlen;
cmd.usmp_rsp = resp;
cmd.usmp_rspsize = resplen;
cmd.usmp_timeout = (int)smp_action_get_timeout(ap);
if (ioctl(dp->ud_fd, USMPFUNC, &cmd) < 0) {
ASSERT(errno != EFAULT);
switch (errno) {
case EINVAL:
return (smp_error(ESMP_BADFUNC, "internal usmp error"));
case EPERM:
return (smp_error(ESMP_PERM,
"insufficient privileges"));
case EIO:
return (smp_error(ESMP_IO, "I/O error"));
default:
return (smp_error(ESMP_SYS, "usmp ioctl failed: %s",
strerror(errno)));
}
}
/*
* There is no way to determine the amount of data actually transferred
* so we will just place the upper bound at the allocated size.
*/
smp_action_set_response_len(ap, resplen);
return (0);
}
static void
usmp_target_name(void *private, char *buf, size_t len)
{
struct usmp_dev *dp = (struct usmp_dev *)private;
(void) strlcpy(buf, dp->ud_dev, len);
}
static uint64_t
usmp_target_addr(void *private)
{
struct usmp_dev *dp = (struct usmp_dev *)private;
return (dp->ud_addr);
}
static const smp_engine_ops_t usmp_ops = {
.seo_open = usmp_open,
.seo_close = usmp_close,
.seo_exec = usmp_exec,
.seo_target_name = usmp_target_name,
.seo_target_addr = usmp_target_addr
};
int
_smp_init(smp_engine_t *ep)
{
smp_engine_config_t config = {
.sec_name = "usmp",
.sec_ops = &usmp_ops
};
return (smp_engine_register(ep, LIBSMP_ENGINE_VERSION, &config));
}
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