/*
* 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) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/*
* l_misc.c :
* This file contains the miscelleneous routines for libsm.so
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/dkio.h>
#include <sys/vtoc.h>
#include <sys/dktp/fdisk.h>
#include <dirent.h>
#include <dlfcn.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <strings.h>
#include "l_defines.h"
#include <rpc/rpc.h>
#include "smed.h"
#include <sys/smedia.h>
#include "../inc/rmedia.h"
#include <smserver.h>
#include <sys/mman.h>
#include <utmpx.h>
#include <limits.h>
#include <netdir.h>
#ifdef _LP64
#ifdef __sparc
#define PATHNAME "/usr/lib/smedia/sparcv9"
#else
#define PATHNAME "/usr/lib/smedia/amd64"
#endif
#else
#define PATHNAME "/usr/lib/smedia"
#endif
#define PERROR(string) my_perror(gettext(string))
static void
my_perror(char *err_string)
{
int error_no;
if (errno == 0)
return;
error_no = errno;
(void) fprintf(stderr, gettext(err_string));
(void) fprintf(stderr, gettext(" : "));
errno = error_no;
perror("");
}
static int
is_server_running(rmedia_handle_t *handle)
{
door_arg_t door_args;
smedia_reqping_t reqping;
smedia_retping_t *retping;
int ret_val;
int door_fd;
CLIENT *clnt;
char rbuf[sizeof (smedia_services_t) + sizeof (door_desc_t)];
smserver_info *server_info;
/*
* We will assume that we are running at level 2 or greater
* and attempt to contact the server using RPC mecahnisms.
* If that fails then we will attempt to contact the server
* using non-rpc mechanism. This will enable the libsmedia
* to be used in SINGLE user mode when inetd is not running.
* We expect the server to have been started manually by user.
*/
clnt = clnt_create(HOST_SELF, SMSERVERPROG, SMSERVERVERS, "local");
if (clnt == (CLIENT *)NULL) {
/*
* The failure could be that we are running at level 1
*/
door_fd = open(smedia_service, O_RDONLY, 0644);
if (door_fd < 0) {
DPRINTF1("Error in opening %s\n",
smedia_service);
return (0);
}
DPRINTF1("rbuf address=%p\n", rbuf);
reqping.cnum = SMEDIA_CNUM_PING;
door_args.data_ptr = (char *)&reqping;
door_args.data_size = sizeof (smedia_services_t);
door_args.desc_ptr = NULL;
door_args.desc_num = 0;
door_args.rbuf = rbuf;
door_args.rsize = sizeof (rbuf);
ret_val = door_call(door_fd, &door_args);
(void) close(door_fd);
if (ret_val < 0) {
return (0);
}
DPRINTF3("rsize = %d data_size = %d data_ptr = %p \n",
door_args.rsize, door_args.data_size,
door_args.data_ptr);
retping = (smedia_retping_t *)(
(void *)door_args.data_ptr);
if (retping->cnum != SMEDIA_CNUM_PING) {
DPRINTF1("*** door call failed *** cnum "
"returned = 0x%x\n", retping->cnum);
return (0);
}
return (1);
}
server_info = smserverproc_get_serverinfo_1(NULL, clnt);
if (server_info == NULL) {
if (clnt)
clnt_destroy(clnt);
return (0);
}
if (server_info->status != 0) {
if (clnt)
clnt_destroy(clnt);
DPRINTF1("get server_info call failed. "
"status = %d\n", server_info->status);
return (0);
}
if (server_info->vernum != SMSERVERVERS) {
if (clnt)
clnt_destroy(clnt);
DPRINTF2("version expected = %d version "
"returned = %d\n", SMSERVERVERS,
server_info->vernum);
return (0);
}
door_fd = open(smedia_service, O_RDONLY, 0644);
if (door_fd < 0) {
DPRINTF1("Error in opening %s\n", smedia_service);
return (0);
}
DPRINTF1("rbuf address=%p\n", rbuf);
reqping.cnum = SMEDIA_CNUM_PING;
door_args.data_ptr = (char *)&reqping;
door_args.data_size = sizeof (smedia_services_t);
door_args.desc_ptr = NULL;
door_args.desc_num = 0;
door_args.rbuf = rbuf;
door_args.rsize = sizeof (rbuf);
ret_val = door_call(door_fd, &door_args);
(void) close(door_fd);
if (ret_val < 0) {
return (0);
}
DPRINTF3("rsize = %d data_size = %d data_ptr = %p \n",
door_args.rsize, door_args.data_size,
door_args.data_ptr);
retping = (smedia_retping_t *)((void *)door_args.data_ptr);
if (retping->cnum != SMEDIA_CNUM_PING) {
DPRINTF1("*** door call failed *** cnum returned "
"= 0x%x\n", retping->cnum);
return (0);
}
handle->sm_clnt = clnt;
return (1);
}
static void *
get_dev_library_handle(int32_t fd)
{
void *handle;
void *old_handle = NULL;
struct dk_cinfo dkinfo;
DIR *dirp;
struct dirent *dp;
char *pathname;
int32_t (*d_fcn_ptr)(ushort_t, ushort_t);
int32_t (*v_fcn_ptr)(void);
int32_t ret_val;
if (ioctl(fd, DKIOCINFO, &dkinfo) == -1) {
PERROR("DKIOCINFO failed");
return (NULL);
}
DPRINTF1("dki_ctype = 0x%x\n", dkinfo.dki_ctype);
if ((pathname = malloc(PATH_MAX)) == NULL) {
PERROR("malloc failed");
return (NULL);
}
dirp = opendir(PATHNAME);
if (dirp == NULL) {
(void) fprintf(stderr, gettext("Couldnot open %s\n"), PATHNAME);
free(pathname);
return (NULL);
}
while ((dp = readdir(dirp)) != NULL) {
if (strncmp("sm_", dp->d_name, 3) != 0) {
DPRINTF1("not a library %s\n", dp->d_name);
continue;
}
if (snprintf(pathname, PATH_MAX, "%s/%s",
PATHNAME, dp->d_name) >= PATH_MAX) {
continue;
}
handle = dlopen(pathname, RTLD_LAZY);
if (handle == NULL) {
PERROR("Error opening library file");
continue;
}
d_fcn_ptr = (int32_t (*)(ushort_t, ushort_t))dlsym(handle,
"_m_device_type");
if (d_fcn_ptr == NULL) {
DPRINTF("Could not find _m_device_type\n");
(void) dlclose(handle);
continue;
}
ret_val = (*d_fcn_ptr)(dkinfo.dki_ctype, 0);
if (ret_val == 0) {
DPRINTF1("NAME %s\n", dp->d_name);
v_fcn_ptr = (int32_t (*)(void))dlsym(handle,
"_m_version_no");
if (v_fcn_ptr == NULL) {
DPRINTF("Could not find _m_version_no\n");
(void) dlclose(handle);
continue;
}
ret_val = (*v_fcn_ptr)();
if ((ret_val >= 0) &&
(ret_val >= SM_PLUGIN_VERSION)) {
if (old_handle != NULL)
(void) dlclose(old_handle);
old_handle = handle;
continue;
} else {
(void) dlclose(handle);
}
} else {
(void) dlclose(handle);
}
}
free(pathname);
(void) closedir(dirp);
return (old_handle);
}
int32_t
call_function(rmedia_handle_t *handle, void *ip, char *func_name)
{
int32_t ret_val;
int32_t (*fcn_ptr)(rmedia_handle_t *handle, void *ip);
void *lib_handle;
if (handle == NULL) {
DPRINTF("Handle is NULL\n");
errno = EINVAL;
return (-1);
}
lib_handle = handle->sm_lib_handle;
if (handle->sm_signature != LIBSMEDIA_SIGNATURE) {
DPRINTF2("call_function:signature expected=0x%x, found=0x%x\n",
LIBSMEDIA_SIGNATURE, handle->sm_signature);
errno = EINVAL;
return (-1);
}
fcn_ptr = (int32_t (*)(rmedia_handle_t *, void*))
dlsym(lib_handle, func_name);
if (fcn_ptr == NULL) {
DPRINTF1("Could not find %s\n", func_name);
errno = ENOTSUP;
return (-1);
}
ret_val = (*fcn_ptr)(handle, ip);
return (ret_val);
}
int32_t
release_handle(rmedia_handle_t *handle)
{
if (handle == NULL) {
DPRINTF("Handle is NULL\n");
errno = EINVAL;
return (-1);
}
if ((handle->sm_dkinfo.dki_ctype == DKC_SCSI_CCS) ||
(handle->sm_dkinfo.dki_ctype == DKC_MD21) ||
(handle->sm_dkinfo.dki_ctype == DKC_CDROM)) {
(void) close(handle->sm_door);
(void) close(handle->sm_death_door);
if (handle->sm_buf != NULL)
(void) munmap(handle->sm_buf, handle->sm_bufsize);
if (handle->sm_clnt != NULL)
clnt_destroy(handle->sm_clnt);
}
(void) close(handle->sm_buffd);
handle->sm_signature = 0;
(void) dlclose(handle->sm_lib_handle);
free(handle);
return (0);
}
smedia_handle_t
get_handle_from_fd(int32_t fd)
{
rmedia_handle_t *handle;
void *lib_handle;
int door_fd, door_server;
int ret_val;
door_arg_t door_args;
smedia_reqopen_t reqopen;
smedia_reterror_t *reterror;
door_desc_t ddesc[2];
char rbuf[sizeof (smedia_services_t) + sizeof (door_desc_t)];
struct stat stat;
DPRINTF("smedia_get_handle called\n");
handle = (rmedia_handle_t *)malloc(sizeof (rmedia_handle_t));
if (handle == NULL) {
DPRINTF("Could not allocate memory for handle\n");
return (NULL);
}
(void) memset((void *) handle, 0, sizeof (rmedia_handle_t));
handle->sm_fd = -1;
handle->sm_door = -1;
handle->sm_death_door = -1;
handle->sm_buffd = -1;
handle->sm_buf = NULL;
handle->sm_bufsize = 0;
if (ioctl(fd, DKIOCINFO, &handle->sm_dkinfo) == -1) {
free(handle);
PERROR("DKIOCINFO failed");
return (NULL);
}
lib_handle = get_dev_library_handle(fd);
if (lib_handle == NULL) {
free(handle);
DPRINTF("lib_Handle is NULL\n");
errno = ENOTSUP;
return (NULL);
}
DPRINTF("Handle initialised successfully.\n");
/* Initialise the handle elements */
handle->sm_lib_handle = lib_handle;
handle->sm_signature = LIBSMEDIA_SIGNATURE;
DPRINTF2("fd=%d signature=0x%x\n", handle->sm_fd, handle->sm_signature);
if ((handle->sm_dkinfo.dki_ctype == DKC_SCSI_CCS) ||
(handle->sm_dkinfo.dki_ctype == DKC_MD21) ||
(handle->sm_dkinfo.dki_ctype == DKC_CDROM)) {
ret_val = is_server_running(handle);
if (ret_val == 0) {
(void) dlclose(handle->sm_lib_handle);
free(handle);
return (NULL);
}
door_fd = open(smedia_service, O_RDONLY, 0644);
if (door_fd < 0) {
(void) dlclose(handle->sm_lib_handle);
free(handle);
if (handle->sm_clnt)
clnt_destroy(handle->sm_clnt);
DPRINTF1("Error in opening %s\n", smedia_service);
PERROR(smedia_service);
return (NULL);
}
DPRINTF1("rbuf address=%p\n", rbuf);
ddesc[0].d_data.d_desc.d_descriptor = fd;
ddesc[0].d_attributes = DOOR_DESCRIPTOR;
reqopen.cnum = SMEDIA_CNUM_OPEN_FD;
door_args.data_ptr = (char *)&reqopen;
door_args.data_size = sizeof (smedia_services_t);
door_args.desc_ptr = &ddesc[0];
door_args.desc_num = 1;
door_args.rbuf = rbuf;
door_args.rsize = sizeof (rbuf);
ret_val = door_call(door_fd, &door_args);
(void) close(door_fd);
if (ret_val < 0) {
(void) dlclose(handle->sm_lib_handle);
free(handle);
if (handle->sm_clnt)
clnt_destroy(handle->sm_clnt);
PERROR("door_call");
return (NULL);
}
DPRINTF3("rsize = %d data_size = %d data_ptr = %p \n",
door_args.rsize, door_args.data_size,
door_args.data_ptr);
reterror = (smedia_reterror_t *)((void *)door_args.data_ptr);
if (reterror->cnum != SMEDIA_CNUM_OPEN_FD) {
(void) dlclose(handle->sm_lib_handle);
free(handle);
if (handle->sm_clnt)
clnt_destroy(handle->sm_clnt);
DPRINTF1(
"*** door call failed *** cnum returned = 0x%x\n", reterror->cnum);
errno = reterror->errnum;
return (NULL);
}
/*
* 2 door descriptors are returned after the above door call.
* The first door descriptor is the one that will be used
* in subsequent smedia calls. A dedicated thread is
* associated with this door to handle client calls.
* The second door descriptor is needed to signal unexpected
* death of the client to the server. This will help the server
* to do the necessary cleanup.
*/
if (door_args.desc_num != 2) {
(void) dlclose(handle->sm_lib_handle);
free(handle);
if (handle->sm_clnt)
clnt_destroy(handle->sm_clnt);
DPRINTF("Num of door descriptors returned by "
"server is not 2");
if (door_args.desc_num)
(void) close(door_args.desc_ptr->\
d_data.d_desc.d_descriptor);
return (NULL);
}
door_server = door_args.desc_ptr->d_data.d_desc.d_descriptor;
/* Check if the descriptor returned is S_IFDOOR */
if (fstat(door_server, &stat) < 0) {
PERROR("fstat");
(void) dlclose(handle->sm_lib_handle);
free(handle);
if (handle->sm_clnt)
clnt_destroy(handle->sm_clnt);
return (NULL);
}
if (!S_ISDOOR(stat.st_mode)) {
DPRINTF(
"Descriptor returned by door_call is not of type DOOR\n");
(void) dlclose(handle->sm_lib_handle);
free(handle);
if (handle->sm_clnt)
clnt_destroy(handle->sm_clnt);
return (NULL);
}
handle->sm_door = door_server;
handle->sm_fd = fd;
door_args.desc_ptr++;
handle->sm_death_door =
door_args.desc_ptr->d_data.d_desc.d_descriptor;
DPRINTF("door call succeeded.\n");
return ((smedia_handle_t)handle);
} else {
handle->sm_fd = fd;
return ((smedia_handle_t)handle);
}
}