oplkmdrv.c revision 030f3a8fd60560aa3c096f68447cd7ea31457e6a
/*
* 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 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* OPL IPSec Key Management Driver.
*
* This driver runs on a OPL Domain. It processes requests received
* from the OPL Service Processor (SP) via mailbox message. It passes
* these requests to the sckmd daemon by means of an /ioctl interface.
*
* Requests received from the SP consist of IPsec security associations
* (SAs) needed to secure the communication between SC and Domain daemons
* communicating using DSCP.
*/
#include <sys/types.h>
#include <sys/cmn_err.h>
#include <sys/kmem.h>
#include <sys/errno.h>
#include <sys/file.h>
#include <sys/open.h>
#include <sys/stat.h>
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/cmn_err.h>
#include <sys/sunddi.h>
#include <sys/sunndi.h>
#include <sys/ddi_impldefs.h>
#include <sys/ndi_impldefs.h>
#include <sys/modctl.h>
#include <sys/disp.h>
#include <sys/note.h>
#include <sys/byteorder.h>
#include <sys/sdt.h>
#include <sys/scfd/scfdscpif.h>
#include <sys/oplkm_msg.h>
#include <sys/sckm_io.h>
#include <sys/oplkm.h>
#define OKM_NODENAME "oplkmdrv" /* Node name */
#define OKM_TARGET_ID 0 /* Target ID */
#define OKM_SM_TOUT 5000 /* small timeout (5msec) */
#define OKM_LG_TOUT 50000 /* large timeout (50msec) */
#define OKM_MB_TOUT 10000000 /* Mailbox timeout (10sec) */
okms_t okms_global; /* Global instance structure */
#ifdef DEBUG
uint32_t okm_debug = DBG_WARN;
#endif
/*
* Prototypes for the module related functions.
*/
int okm_attach(dev_info_t *devi, ddi_attach_cmd_t cmd);
int okm_detach(dev_info_t *devi, ddi_detach_cmd_t cmd);
int okm_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result);
int okm_open(dev_t *devp, int flag, int otyp, struct cred *cred);
int okm_close(dev_t dev, int flag, int otyp, struct cred *cred);
int okm_ioctl(dev_t dev, int cmd, intptr_t data, int flag,
cred_t *cred, int *rvalp);
/*
* Prototypes for the internal functions.
*/
int okm_get_req(okms_t *okmsp, sckm_ioctl_getreq_t *ireqp,
intptr_t data, int flag);
int okm_process_req(okms_t *okmsp, okm_req_hdr_t *reqp, uint32_t len,
sckm_ioctl_getreq_t *ireqp, intptr_t data, int flag);
int okm_process_status(okms_t *okmsp, sckm_ioctl_status_t *ireply);
void okm_event_handler(scf_event_t event, void *arg);
int okm_send_reply(okms_t *okmsp, uint32_t transid, uint32_t status,
uint32_t sadb_err, uint32_t sadb_ver);
int block_until_ready(okms_t *okmsp);
static int okm_copyin_ioctl_getreq(intptr_t userarg,
sckm_ioctl_getreq_t *driverarg, int flag);
static int okm_copyout_ioctl_getreq(sckm_ioctl_getreq_t *driverarg,
intptr_t userarg, int flag);
static void okm_cleanup(okms_t *okmsp);
static int okm_mbox_init(okms_t *okmsp);
static void okm_mbox_fini(okms_t *okmsp);
static clock_t okm_timeout_val(int error);
struct cb_ops okm_cb_ops = {
okm_open, /* open */
okm_close, /* close */
nodev, /* strategy */
nodev, /* print */
nodev, /* dump */
nodev, /* read */
nodev, /* write */
okm_ioctl, /* ioctl */
nodev, /* devmap */
nodev, /* mmap */
nodev, /* segmap */
nochpoll, /* poll */
ddi_prop_op, /* prop_op */
0, /* streamtab */
D_NEW | D_MP /* Driver compatibility flag */
};
struct dev_ops okm_ops = {
DEVO_REV, /* devo_rev, */
0, /* refcnt */
okm_info, /* get_dev_info */
nulldev, /* identify */
nulldev, /* probe */
okm_attach, /* attach */
okm_detach, /* detach */
nodev, /* reset */
&okm_cb_ops, /* driver operations */
(struct bus_ops *)0 /* no bus operations */
};
struct modldrv modldrv = {
&mod_driverops,
"OPL Key Management Driver v%I%",
&okm_ops,
};
struct modlinkage modlinkage = {
MODREV_1,
&modldrv,
NULL
};
/*
* _init - Module's init routine.
*/
int
_init(void)
{
int ret;
if ((ret = mod_install(&modlinkage)) != 0) {
cmn_err(CE_WARN, "mod_install failed, error = %d", ret);
}
return (ret);
}
/*
* _fini - Module's fini routine.
*/
int
_fini(void)
{
int ret;
if ((ret = mod_remove(&modlinkage)) != 0) {
return (ret);
}
return (ret);
}
/*
* _info - Module's info routine.
*/
int
_info(struct modinfo *modinfop)
{
return (mod_info(&modlinkage, modinfop));
}
/*
* okm_attach - Module's attach routine.
*
* Description: Initializes the modules state structure and create
* the minor device node.
*/
int
okm_attach(dev_info_t *dip, ddi_attach_cmd_t cmd)
{
int instance;
okms_t *okmsp = &okms_global;
instance = ddi_get_instance(dip);
/* Only one instance is supported. */
if (instance != 0) {
return (DDI_FAILURE);
}
if (cmd != DDI_ATTACH) {
return (DDI_FAILURE);
}
okmsp->km_dip = dip;
okmsp->km_major = ddi_name_to_major(ddi_get_name(dip));
okmsp->km_inst = instance;
/*
* Get an interrupt block cookie corresponding to the
* interrupt priority of the event handler.
* Assert that the event priority is not redefined to
* some other priority.
*/
/* LINTED */
ASSERT(SCF_EVENT_PRI == DDI_SOFTINT_LOW);
if (ddi_get_soft_iblock_cookie(dip, SCF_EVENT_PRI,
&okmsp->km_ibcookie) != DDI_SUCCESS) {
cmn_err(CE_WARN, "ddi_get_soft_iblock_cookie failed.");
return (DDI_FAILURE);
}
mutex_init(&okmsp->km_lock, NULL, MUTEX_DRIVER,
(void *)okmsp->km_ibcookie);
okmsp->km_clean |= OKM_CLEAN_LOCK;
cv_init(&okmsp->km_wait, NULL, CV_DRIVER, NULL);
okmsp->km_clean |= OKM_CLEAN_CV;
/*
* set clean_node ahead as remove_node has to be called even
* if create node fails.
*/
okmsp->km_clean |= OKM_CLEAN_NODE;
if (ddi_create_minor_node(dip, OKM_NODENAME, S_IFCHR,
instance, NULL, NULL) == DDI_FAILURE) {
cmn_err(CE_WARN, "Device node creation failed");
okm_cleanup(okmsp);
return (DDI_FAILURE);
}
ddi_set_driver_private(dip, (caddr_t)okmsp);
ddi_report_dev(dip);
return (DDI_SUCCESS);
}
/*
* okm_detach - Module's detach routine.
*
* Description: Cleans up the module's state structures and any other
* relevant data.
*/
int
okm_detach(dev_info_t *dip, ddi_detach_cmd_t cmd)
{
okms_t *okmsp;
if (cmd != DDI_DETACH) {
return (DDI_FAILURE);
}
if ((okmsp = ddi_get_driver_private(dip)) == NULL) {
return (DDI_FAILURE);
}
mutex_enter(&okmsp->km_lock);
/*
* Check if the mailbox is still in use.
*/
if (okmsp->km_state & OKM_MB_INITED) {
mutex_exit(&okmsp->km_lock);
cmn_err(CE_WARN, "Detach failure: Mailbox in use");
return (DDI_FAILURE);
}
mutex_exit(&okmsp->km_lock);
okm_cleanup(okmsp);
ddi_set_driver_private(dip, NULL);
return (DDI_SUCCESS);
}
/*
* okm_info - Module's info routine.
*/
/* ARGSUSED */
int
okm_info(dev_info_t *dip, ddi_info_cmd_t infocmd, void *arg, void **result)
{
okms_t *okmsp;
minor_t minor;
int ret = DDI_FAILURE;
switch (infocmd) {
case DDI_INFO_DEVT2DEVINFO:
minor = getminor((dev_t)arg);
okmsp = ddi_get_driver_private(dip);
if (okmsp == NULL) {
*result = NULL;
} else {
*result = okmsp->km_dip;
ret = DDI_SUCCESS;
}
break;
case DDI_INFO_DEVT2INSTANCE:
minor = getminor((dev_t)arg);
*result = (void *)(uintptr_t)minor;
ret = DDI_SUCCESS;
default:
break;
}
return (ret);
}
/*
* okm_open - Device open routine.
*
* Description: Initializes the mailbox and waits until the mailbox
* gets connected. Only one open at a time is supported.
*/
/*ARGSUSED*/
int
okm_open(dev_t *devp, int flag, int otyp, struct cred *cred)
{
okms_t *okmsp = &okms_global;
int ret = 0;
DPRINTF(DBG_DRV, ("okm_open: called\n"));
mutex_enter(&okmsp->km_lock);
if (okmsp->km_state & OKM_OPENED) {
/* Only one open supported */
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_WARN, ("okm_open: already opened\n"));
return (EBUSY);
}
okmsp->km_state |= OKM_OPENED;
ret = block_until_ready(okmsp);
if (ret != 0) {
okmsp->km_state &= ~OKM_OPENED;
}
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_DRV, ("okm_open: ret=%d\n", ret));
return (ret);
}
/*
* block_until_ready - Function to wait until the mailbox is ready to use.
*
* Description: It initializes the mailbox and waits for the mailbox
* state to transition to connected.
*/
int
block_until_ready(okms_t *okmsp)
{
int ret = 0;
DPRINTF(DBG_DRV, ("block_until_ready: called\n"));
ASSERT(MUTEX_HELD(&okmsp->km_lock));
if (okmsp->km_state & OKM_MB_DISC) {
DPRINTF(DBG_DRV, ("block_until_ready: closing the mailbox\n"));
okm_mbox_fini(okmsp);
}
if (okmsp->km_state & OKM_MB_CONN) {
DPRINTF(DBG_DRV, ("block_until_ready: mailbox connected\n"));
return (0);
}
/*
* Initialize mailbox.
*/
if ((ret = okm_mbox_init(okmsp)) != 0) {
DPRINTF(DBG_MBOX,
("block_until_ready: mailbox init failed ret=%d\n", ret));
return (ret);
}
DPRINTF(DBG_DRV, ("block_until_ready: ret=%d", ret));
return (ret);
}
/*
* okm_close - Device close routine.
*
* Description: Closes the mailbox.
*/
/*ARGSUSED*/
int
okm_close(dev_t dev, int flag, int otyp, struct cred *cred)
{
okms_t *okmsp = &okms_global;
DPRINTF(DBG_DRV, ("okm_close: called\n"));
/* Close the lower layer first */
mutex_enter(&okmsp->km_lock);
okm_mbox_fini(okmsp);
okmsp->km_state = 0;
mutex_exit(&okmsp->km_lock);
return (0);
}
/*
* okm_ioctl - Device ioctl routine.
*
* Description: Processes ioctls from the daemon.
*/
/*ARGSUSED*/
int
okm_ioctl(dev_t dev, int cmd, intptr_t data, int flag, cred_t *cred, int *rvalp)
{
okms_t *okmsp = &okms_global;
sckm_ioctl_getreq_t ireq;
sckm_ioctl_status_t istatus;
int ret = 0;
switch (cmd) {
case SCKM_IOCTL_GETREQ:
DPRINTF(DBG_DRV, ("okm_ioctl: GETREQ\n"));
if (okm_copyin_ioctl_getreq(data, &ireq, flag)) {
return (EFAULT);
}
ret = okm_get_req(okmsp, &ireq, data, flag);
DPRINTF(DBG_DRV, ("okm_ioctl: GETREQ ret=%d\n", ret));
break;
case SCKM_IOCTL_STATUS:
DPRINTF(DBG_DRV, ("okm_ioctl: STATUS\n"));
if (ddi_copyin((caddr_t)data, &istatus,
sizeof (sckm_ioctl_status_t), flag)) {
return (EFAULT);
}
ret = okm_process_status(okmsp, &istatus);
DPRINTF(DBG_DRV, ("okm_ioctl: STATUS ret=%d\n", ret));
break;
default:
DPRINTF(DBG_DRV, ("okm_ioctl: UNKNOWN ioctl\n"));
ret = EINVAL;
}
return (ret);
}
/*
* okm_get_req - Get a request from the mailbox.
*
* Description: It blocks until a message is received, then processes
* the message and returns it to the requestor.
*/
int
okm_get_req(okms_t *okmsp, sckm_ioctl_getreq_t *ireqp, intptr_t data, int flag)
{
okm_req_hdr_t *reqp;
caddr_t msgbuf;
uint32_t len;
int ret;
DPRINTF(DBG_DRV, ("okm_getreq: called\n"));
mutex_enter(&okmsp->km_lock);
if ((ret = block_until_ready(okmsp)) != 0) {
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_WARN, ("okm_getreq: failed ret=%d\n", ret));
return (ret);
}
if (okmsp->km_reqp != NULL) {
DPRINTF(DBG_DRV, ("okm_getreq: req cached\n"));
reqp = okmsp->km_reqp;
len = okmsp->km_reqlen;
okmsp->km_reqp = NULL;
okmsp->km_reqlen = 0;
} else {
retry:
while (OKM_MBOX_READY(okmsp) &&
((ret = scf_mb_canget(okmsp->km_target,
okmsp->km_key, &len)) != 0)) {
if (ret != ENOMSG) {
DPRINTF(DBG_WARN, ("okm_getreq: Unknown "
"mbox failure=%d\n", ret));
mutex_exit(&okmsp->km_lock);
return (EIO);
}
DPRINTF(DBG_MBOX, ("okm_getreq: waiting for mesg\n"));
if (cv_wait_sig(&okmsp->km_wait,
&okmsp->km_lock) <= 0) {
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_DRV, ("okm_getreq:interrupted\n"));
return (EINTR);
}
}
if (!OKM_MBOX_READY(okmsp)) {
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_WARN, ("okm_getreq: mailbox not ready\n"));
return (EIO);
}
ASSERT(len != 0);
msgbuf = kmem_alloc(len, KM_SLEEP);
okmsp->km_sg_rcv.msc_dptr = msgbuf;
okmsp->km_sg_rcv.msc_len = len;
DPRINTF(DBG_MBOX, ("okm_getreq: getmsg\n"));
ret = scf_mb_getmsg(okmsp->km_target, okmsp->km_key, len, 1,
&okmsp->km_sg_rcv, 0);
if (ret == ENOMSG || ret == EMSGSIZE) {
kmem_free(msgbuf, len);
DPRINTF(DBG_MBOX, ("okm_getreq: nomsg ret=%d\n", ret));
goto retry;
} else if (ret != 0) {
kmem_free(msgbuf, len);
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_WARN,
("okm_getreq: Unknown mbox failure=%d\n", ret));
return (EIO);
}
/* check message length */
if (len < sizeof (okm_req_hdr_t)) {
/* protocol error, drop message */
kmem_free(msgbuf, len);
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_WARN, ("okm_getreq: Bad message\n"));
return (EBADMSG);
}
reqp = (okm_req_hdr_t *)msgbuf;
reqp->krq_version = ntohl(reqp->krq_version);
reqp->krq_transid = ntohl(reqp->krq_transid);
reqp->krq_cmd = ntohl(reqp->krq_cmd);
reqp->krq_reserved = ntohl(reqp->krq_reserved);
/* check version of the message received */
if (reqp->krq_version != OKM_PROTOCOL_VERSION) {
okm_send_reply(okmsp, reqp->krq_transid,
OKM_ERR_VERSION, 0, 0);
kmem_free(msgbuf, len);
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_WARN, ("okm_getreq: Unknown version=%d\n",
reqp->krq_version));
return (EBADMSG);
}
}
/* process message */
ret = okm_process_req(okmsp, reqp, len, ireqp, data, flag);
if (okmsp->km_reqp == NULL) {
/*
* The message is not saved, so free the buffer.
*/
kmem_free(reqp, len);
}
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_DRV, ("okm_getreq: ret=%d\n", ret));
return (ret);
}
/*
* okm_process_req - Process the request.
*
* Description: Validate the request and then give the request to the
* daemon.
*/
int
okm_process_req(okms_t *okmsp, okm_req_hdr_t *reqp, uint32_t len,
sckm_ioctl_getreq_t *ireqp, intptr_t data, int flag)
{
void *req_datap = (void *)(((char *)reqp) + sizeof (okm_req_hdr_t));
int sadb_msglen = len - sizeof (okm_req_hdr_t);
DPRINTF(DBG_DRV, ("okm_process_req: called\n"));
DUMP_REQ(reqp, len);
switch (reqp->krq_cmd) {
case OKM_MSG_SADB:
/* sanity check request */
if (sadb_msglen <= 0) {
okm_send_reply(okmsp, reqp->krq_transid,
OKM_ERR_SADB_MSG, 0, 0);
DPRINTF(DBG_WARN, ("okm_process_req: bad message\n"));
return (EBADMSG);
}
/*
* Save the message, prior to giving it to the daemon.
*/
okmsp->km_reqp = reqp;
okmsp->km_reqlen = len;
if (ireqp->buf_len < len) {
DPRINTF(DBG_WARN,
("okm_process_req: not enough space\n"));
return (ENOSPC);
}
ireqp->transid = reqp->krq_transid;
ireqp->type = SCKM_IOCTL_REQ_SADB;
if (ddi_copyout(req_datap, ireqp->buf, sadb_msglen, flag)) {
DPRINTF(DBG_WARN,
("okm_process_req: copyout failed\n"));
return (EFAULT);
}
ireqp->buf_len = sadb_msglen;
if (okm_copyout_ioctl_getreq(ireqp, data, flag)) {
DPRINTF(DBG_WARN,
("okm_process_req: copyout failed\n"));
return (EFAULT);
}
break;
default:
cmn_err(CE_WARN, "Unknown cmd 0x%x received", reqp->krq_cmd);
/*
* Received an unknown command, send corresponding
* error message.
*/
okm_send_reply(okmsp, reqp->krq_transid, OKM_ERR_BAD_CMD, 0, 0);
return (EBADMSG);
}
DPRINTF(DBG_DRV, ("okm_process_req: ret=0\n"));
return (0);
}
/*
* okm_process_status - Process the status from the daemon.
*
* Description: Processes the status received from the daemon and sends
* corresponding message to the SP.
*/
int
okm_process_status(okms_t *okmsp, sckm_ioctl_status_t *ireply)
{
uint32_t status;
uint32_t sadb_msg_errno = 0;
uint32_t sadb_msg_version = 0;
okm_req_hdr_t *reqp = okmsp->km_reqp;
int ret;
DPRINTF(DBG_DRV, ("okm_process_status: called\n"));
mutex_enter(&okmsp->km_lock);
if ((ret = block_until_ready(okmsp)) != 0) {
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_WARN,
("okm_process_status: Unknown failure=%d\n", ret));
return (ret);
}
/* fail if no status is expected, or if it does not match */
if (!okmsp->km_reqp || (reqp->krq_transid != ireply->transid)) {
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_WARN,
("okm_process_status: req/transid mismatch\n"));
return (EINVAL);
}
switch (ireply->status) {
case SCKM_IOCTL_STAT_SUCCESS:
DPRINTF(DBG_DRV, ("okm_process_status: SUCCESS\n"));
status = OKM_SUCCESS;
break;
case SCKM_IOCTL_STAT_ERR_PFKEY:
DPRINTF(DBG_DRV, ("okm_process_status: PFKEY ERROR\n"));
status = OKM_ERR_SADB_PFKEY;
sadb_msg_errno = ireply->sadb_msg_errno;
break;
case SCKM_IOCTL_STAT_ERR_REQ:
DPRINTF(DBG_DRV, ("okm_process_status: REQ ERROR\n"));
status = OKM_ERR_DAEMON;
break;
case SCKM_IOCTL_STAT_ERR_VERSION:
DPRINTF(DBG_DRV, ("okm_process_status: SADB VERSION ERROR\n"));
status = OKM_ERR_SADB_VERSION;
sadb_msg_version = ireply->sadb_msg_version;
break;
case SCKM_IOCTL_STAT_ERR_TIMEOUT:
DPRINTF(DBG_DRV, ("okm_process_status: TIMEOUT ERR\n"));
status = OKM_ERR_SADB_TIMEOUT;
break;
case SCKM_IOCTL_STAT_ERR_OTHER:
DPRINTF(DBG_DRV, ("okm_process_status: OTHER ERR\n"));
status = OKM_ERR_DAEMON;
break;
case SCKM_IOCTL_STAT_ERR_SADB_TYPE:
DPRINTF(DBG_DRV, ("okm_process_status: SADB TYPE ERR\n"));
status = OKM_ERR_SADB_BAD_TYPE;
break;
default:
cmn_err(CE_WARN, "SCKM daemon returned invalid status %d\n",
ireply->status);
status = OKM_ERR_DAEMON;
}
ret = okm_send_reply(okmsp, ireply->transid, status,
sadb_msg_errno, sadb_msg_version);
/*
* Clean up the cached request now.
*/
if (ret == 0) {
kmem_free(okmsp->km_reqp, okmsp->km_reqlen);
okmsp->km_reqp = NULL;
okmsp->km_reqlen = 0;
}
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_DRV, ("okm_process_status: ret=%d\n", ret));
return (ret);
}
/*
* okm_copyin_ioctl_getreq - copy-in the ioctl request from the daemon.
*/
static int
okm_copyin_ioctl_getreq(intptr_t userarg, sckm_ioctl_getreq_t *driverarg,
int flag)
{
#ifdef _MULTI_DATAMODEL
switch (ddi_model_convert_from(flag & FMODELS)) {
case DDI_MODEL_ILP32: {
sckm_ioctl_getreq32_t driverarg32;
if (ddi_copyin((caddr_t)userarg, &driverarg32,
sizeof (sckm_ioctl_getreq32_t), flag)) {
return (EFAULT);
}
driverarg->transid = driverarg32.transid;
driverarg->type = driverarg32.type;
driverarg->buf = (caddr_t)(uintptr_t)driverarg32.buf;
driverarg->buf_len = driverarg32.buf_len;
break;
}
case DDI_MODEL_NONE: {
if (ddi_copyin((caddr_t)userarg, &driverarg,
sizeof (sckm_ioctl_getreq_t), flag)) {
return (EFAULT);
}
break;
}
}
#else /* ! _MULTI_DATAMODEL */
if (ddi_copyin((caddr_t)userarg, &driverarg,
sizeof (sckm_ioctl_getreq_t), flag)) {
return (EFAULT);
}
#endif /* _MULTI_DATAMODEL */
return (0);
}
/*
* okm_copyout_ioctl_getreq - copy-out the request to the daemon.
*/
static int
okm_copyout_ioctl_getreq(sckm_ioctl_getreq_t *driverarg, intptr_t userarg,
int flag)
{
#ifdef _MULTI_DATAMODEL
switch (ddi_model_convert_from(flag & FMODELS)) {
case DDI_MODEL_ILP32: {
sckm_ioctl_getreq32_t driverarg32;
driverarg32.transid = driverarg->transid;
driverarg32.type = driverarg->type;
driverarg32.buf = (caddr32_t)(uintptr_t)driverarg->buf;
driverarg32.buf_len = driverarg->buf_len;
if (ddi_copyout(&driverarg32, (caddr_t)userarg,
sizeof (sckm_ioctl_getreq32_t), flag)) {
return (EFAULT);
}
break;
}
case DDI_MODEL_NONE:
if (ddi_copyout(driverarg, (caddr_t)userarg,
sizeof (sckm_ioctl_getreq_t), flag)) {
return (EFAULT);
}
break;
}
#else /* ! _MULTI_DATAMODEL */
if (ddi_copyout(driverarg, (caddr_t)userarg,
sizeof (sckm_ioctl_getreq_t), flag)) {
return (EFAULT);
}
#endif /* _MULTI_DATAMODEL */
return (0);
}
/*
* okm_cleanup - Cleanup routine.
*/
static void
okm_cleanup(okms_t *okmsp)
{
ASSERT(okmsp != NULL);
if (okmsp->km_clean & OKM_CLEAN_NODE) {
ddi_remove_minor_node(okmsp->km_dip, NULL);
}
if (okmsp->km_clean & OKM_CLEAN_LOCK)
mutex_destroy(&okmsp->km_lock);
if (okmsp->km_clean & OKM_CLEAN_CV)
cv_destroy(&okmsp->km_wait);
if (okmsp->km_reqp != NULL) {
kmem_free(okmsp->km_reqp, okmsp->km_reqlen);
okmsp->km_reqp = NULL;
okmsp->km_reqlen = 0;
}
ddi_set_driver_private(okmsp->km_dip, NULL);
}
/*
* okm_mbox_init - Mailbox specific initialization.
*/
static int
okm_mbox_init(okms_t *okmsp)
{
int ret;
clock_t tout;
ASSERT(MUTEX_HELD(&okmsp->km_lock));
okmsp->km_target = OKM_TARGET_ID;
okmsp->km_key = DKMD_KEY;
okmsp->km_state &= ~OKM_MB_INITED;
/* Iterate until mailbox gets connected */
while (!(okmsp->km_state & OKM_MB_CONN)) {
DPRINTF(DBG_MBOX, ("okm_mbox_init: calling mb_init\n"));
ret = scf_mb_init(okmsp->km_target, okmsp->km_key,
okm_event_handler, (void *)okmsp);
DPRINTF(DBG_MBOX, ("okm_mbox_init: mb_init ret=%d\n", ret));
if (ret != 0) {
DPRINTF(DBG_MBOX,
("okm_mbox_init: failed ret =%d\n", ret));
DTRACE_PROBE1(okm_mbox_fail, int, ret);
} else {
okmsp->km_state |= OKM_MB_INITED;
/* Block until the mailbox is ready to communicate. */
while (!(okmsp->km_state &
(OKM_MB_CONN | OKM_MB_DISC))) {
if (cv_wait_sig(&okmsp->km_wait,
&okmsp->km_lock) <= 0) {
/* interrupted */
ret = EINTR;
break;
}
}
}
if ((ret != 0) || (okmsp->km_state & OKM_MB_DISC)) {
if (okmsp->km_state & OKM_MB_INITED) {
(void) scf_mb_fini(okmsp->km_target,
okmsp->km_key);
}
if (okmsp->km_state & OKM_MB_DISC) {
DPRINTF(DBG_WARN,
("okm_mbox_init: mbox DISC_ERROR\n"));
DTRACE_PROBE1(okm_mbox_fail,
int, OKM_MB_DISC);
}
okmsp->km_state &= ~(OKM_MB_INITED | OKM_MB_DISC |
OKM_MB_CONN);
if (ret == EINTR) {
return (ret);
}
/*
* If there was failure, then wait for
* OKM_MB_TOUT secs and retry again.
*/
DPRINTF(DBG_MBOX, ("okm_mbox_init: waiting...\n"));
tout = ddi_get_lbolt() + drv_usectohz(OKM_MB_TOUT);
ret = cv_timedwait_sig(&okmsp->km_wait,
&okmsp->km_lock, tout);
if (ret == 0) {
/* if interrupted, return immediately. */
DPRINTF(DBG_MBOX,
("okm_mbox_init: interrupted\n"));
return (EINTR);
}
}
}
ret = scf_mb_ctrl(okmsp->km_target, okmsp->km_key,
SCF_MBOP_MAXMSGSIZE, &okmsp->km_maxsz);
/*
* The max msg size should be at least the size of reply
* we need to send.
*/
if ((ret == 0) && (okmsp->km_maxsz < sizeof (okm_rep_hdr_t))) {
cmn_err(CE_WARN, "Max message size expected >= %ld "
"but found %d\n", sizeof (okm_rep_hdr_t), okmsp->km_maxsz);
ret = EIO;
}
if (ret != 0) {
okmsp->km_state &= ~OKM_MB_INITED;
(void) scf_mb_fini(okmsp->km_target, okmsp->km_key);
}
DPRINTF(DBG_MBOX, ("okm_mbox_init: mb_init ret=%d\n", ret));
return (ret);
}
/*
* okm_mbox_fini - Mailbox de-initialization.
*/
static void
okm_mbox_fini(okms_t *okmsp)
{
int ret = 0;
ASSERT(MUTEX_HELD(&okmsp->km_lock));
if (okmsp->km_state & OKM_MB_INITED) {
DPRINTF(DBG_MBOX, ("okm_mbox_fini: calling mb_fini\n"));
ret = scf_mb_fini(okmsp->km_target, okmsp->km_key);
DPRINTF(DBG_MBOX, ("okm_mbox_fini: mb_fini ret=%d\n", ret));
if (ret != 0) {
cmn_err(CE_WARN,
"Failed to close the Mailbox error=%d", ret);
}
okmsp->km_state &= ~(OKM_MB_INITED | OKM_MB_CONN | OKM_MB_DISC);
}
}
/*
* okm_event_handler - Mailbox event handler.
*
* Description: Implements a state machine to handle all the mailbox
* events. For each event, it sets the appropriate state
* flag and wakes up the threads waiting for that event.
*/
void
okm_event_handler(scf_event_t event, void *arg)
{
okms_t *okmsp = (okms_t *)arg;
DPRINTF(DBG_MBOX, ("okm_event_handler: called\n"));
ASSERT(okmsp != NULL);
mutex_enter(&okmsp->km_lock);
if (!(okmsp->km_state & OKM_MB_INITED)) {
/*
* Ignore all events if the state flag indicates that the
* mailbox not initialized, this may happen during the close.
*/
mutex_exit(&okmsp->km_lock);
DPRINTF(DBG_MBOX,
("okm_event_handler: event=0x%X - mailbox not inited \n",
event));
return;
}
switch (event) {
case SCF_MB_CONN_OK:
DPRINTF(DBG_MBOX, ("okm_event_handler: Event CONN_OK\n"));
/*
* Now the mailbox is ready to use, lets wake up
* any one waiting for this event.
*/
okmsp->km_state |= OKM_MB_CONN;
cv_broadcast(&okmsp->km_wait);
break;
case SCF_MB_MSG_DATA:
DPRINTF(DBG_MBOX, ("okm_event_handler: Event MSG_DATA\n"));
/*
* A message is available in the mailbox,
* wakeup if any one is ready to read the message.
*/
if (OKM_MBOX_READY(okmsp)) {
cv_broadcast(&okmsp->km_wait);
}
break;
case SCF_MB_SPACE:
DPRINTF(DBG_MBOX, ("okm_event_handler: Event MB_SPACE\n"));
/*
* Now the mailbox is ready to transmit, lets
* wakeup if any one is waiting to write.
*/
if (OKM_MBOX_READY(okmsp)) {
cv_broadcast(&okmsp->km_wait);
}
break;
case SCF_MB_DISC_ERROR:
DPRINTF(DBG_MBOX, ("okm_event_handler: Event DISC_ERROR\n"));
okmsp->km_state &= ~OKM_MB_CONN;
okmsp->km_state |= OKM_MB_DISC;
cv_broadcast(&okmsp->km_wait);
break;
default:
cmn_err(CE_WARN, "Unexpected event received\n");
}
mutex_exit(&okmsp->km_lock);
}
/*
* okm_send_reply - Send a mailbox reply message.
*/
int
okm_send_reply(okms_t *okmsp, uint32_t transid,
uint32_t status, uint32_t sadb_err, uint32_t sadb_ver)
{
okm_rep_hdr_t reply;
int ret = EIO;
DPRINTF(DBG_DRV, ("okm_send_reply: called\n"));
ASSERT(MUTEX_HELD(&okmsp->km_lock));
reply.krp_version = htonl(OKM_PROTOCOL_VERSION);
reply.krp_transid = htonl(transid);
reply.krp_status = htonl(status);
reply.krp_sadb_errno = htonl(sadb_err);
reply.krp_sadb_version = htonl(sadb_ver);
okmsp->km_sg_tx.msc_dptr = (caddr_t)&reply;
okmsp->km_sg_tx.msc_len = sizeof (reply);
DUMP_REPLY(&reply);
while (OKM_MBOX_READY(okmsp)) {
DPRINTF(DBG_MBOX, ("okm_send_reply: sending reply\n"));
ret = scf_mb_putmsg(okmsp->km_target, okmsp->km_key,
sizeof (reply), 1, &okmsp->km_sg_tx, 0);
DPRINTF(DBG_MBOX, ("okm_send_reply: putmsg ret=%d\n", ret));
if (ret == EBUSY || ret == ENOSPC) {
/* mailbox is busy, poll/retry */
if (cv_timedwait_sig(&okmsp->km_wait,
&okmsp->km_lock, okm_timeout_val(ret)) == 0) {
/* interrupted */
ret = EINTR;
DPRINTF(DBG_DRV,
("okm_send_reply: interrupted\n"));
break;
}
} else {
break;
}
}
DPRINTF(DBG_DRV, ("okm_send_reply: ret=%d\n", ret));
return (ret);
}
/*
* okm_timeout_val -- Return appropriate timeout value.
*
* A small timeout value is returned for EBUSY as the mailbox busy
* condition may go away sooner and we are expected to poll.
*
* A larger timeout value is returned for ENOSPC case, as the condition
* depends on the peer to release buffer space.
* NOTE: there will also be an event(SCF_MB_SPACE) but a timeout is
* used for reliability purposes.
*/
static clock_t
okm_timeout_val(int error)
{
clock_t tval;
ASSERT(error == EBUSY || error == ENOSPC);
if (error == EBUSY) {
tval = OKM_SM_TOUT;
} else {
tval = OKM_LG_TOUT;
}
return (drv_usectohz(tval));
}
#ifdef DEBUG
static void
okm_print_req(okm_req_hdr_t *reqp, uint32_t len)
{
uint8_t *datap = (uint8_t *)(((char *)reqp) + sizeof (okm_req_hdr_t));
int msglen = len - sizeof (okm_req_hdr_t);
int i, j;
#define BYTES_PER_LINE 20
char bytestr[BYTES_PER_LINE * 3 + 1];
if (!(okm_debug & DBG_MESG))
return;
printf("OKM: Request ver=%d transid=%d cmd=%s\n",
reqp->krq_version, reqp->krq_transid,
((reqp->krq_cmd == OKM_MSG_SADB) ? "MSG_SADB" : "UNKNOWN"));
for (i = 0; i < msglen; ) {
for (j = 0; (j < BYTES_PER_LINE) && (i < msglen); j++, i++) {
sprintf(&bytestr[j * 3], "%02X ", datap[i]);
}
if (j != 0) {
printf("\t%s\n", bytestr);
}
}
}
static void
okm_print_rep(okm_rep_hdr_t *repp)
{
if (!(okm_debug & DBG_MESG))
return;
printf("OKM: Reply Ver=%d Transid=%d Status=%d ",
repp->krp_version, repp->krp_transid, repp->krp_status);
printf("Sadb_errno=%d Sadb_ver=%d\n", repp->krp_sadb_errno,
repp->krp_sadb_version);
}
#endif