1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * l_misc.c :
28 * This file contains the miscelleneous routines for libsm.so
29 */
30
31 #include <sys/types.h>
32 #include <sys/stat.h>
33 #include <sys/utsname.h>
34 #include <fcntl.h>
35 #include <sys/dkio.h>
36 #include <sys/vtoc.h>
37 #include <sys/dktp/fdisk.h>
38 #include <dirent.h>
39 #include <dlfcn.h>
40 #include <stdlib.h>
41 #include <sys/stat.h>
42 #include <strings.h>
43 #include "l_defines.h"
44 #include <rpc/rpc.h>
45 #include "smed.h"
46 #include <sys/smedia.h>
47 #include "../inc/rmedia.h"
48 #include <smserver.h>
49 #include <sys/mman.h>
50 #include <utmpx.h>
51 #include <limits.h>
52
53 #ifdef _LP64
54 #ifdef __sparc
55 #define PATHNAME "/usr/lib/smedia/sparcv9"
56 #else
57 #define PATHNAME "/usr/lib/smedia/amd64"
58 #endif
59 #else
60 #define PATHNAME "/usr/lib/smedia"
61 #endif
62
63 #define PERROR(string) my_perror(gettext(string))
64 #define RUN_LIBSMEDIA_SERVER " /usr/lib/smedia/rpc.smserverd &\n"
65
66 static void
my_perror(char * err_string)67 my_perror(char *err_string)
68 {
69
70 int error_no;
71 if (errno == 0)
72 return;
73
74 error_no = errno;
75 (void) fprintf(stderr, gettext(err_string));
76 (void) fprintf(stderr, gettext(" : "));
77 errno = error_no;
78 perror("");
79 }
80
81 static int
is_server_running(rmedia_handle_t * handle)82 is_server_running(rmedia_handle_t *handle)
83 {
84 door_arg_t door_args;
85 smedia_reqping_t reqping;
86 smedia_retping_t *retping;
87 int ret_val;
88 int door_fd;
89 CLIENT *clnt;
90 char rbuf[sizeof (smedia_services_t) + sizeof (door_desc_t)];
91 smserver_info *server_info;
92
93 /*
94 * We will assume that we are running at level 2 or greater
95 * and attempt to contact the server using RPC mecahnisms.
96 * If that fails then we will attempt to contact the server
97 * using non-rpc mechanism. This will enable the libsmedia
98 * to be used in SINGLE user mode when inetd is not running.
99 * We expect the server to have been started manually by user.
100 *
101 * Note that "localhost" is used (vs hostname (eg, "uname -n")),
102 * as this minimizes interference with common IPSec rules.
103 */
104
105 clnt = clnt_create("localhost", SMSERVERPROG, SMSERVERVERS,
106 "circuit_v");
107 if (clnt == (CLIENT *)NULL) {
108 /*
109 * The failure could be that we are running at level 1
110 */
111 door_fd = open(smedia_service, O_RDONLY, 0644);
112 if (door_fd < 0) {
113 DPRINTF1("Error in opening %s\n",
114 smedia_service);
115 return (0);
116 }
117
118 DPRINTF1("rbuf address=%p\n", rbuf);
119 reqping.cnum = SMEDIA_CNUM_PING;
120 door_args.data_ptr = (char *)&reqping;
121 door_args.data_size = sizeof (smedia_services_t);
122 door_args.desc_ptr = NULL;
123 door_args.desc_num = 0;
124 door_args.rbuf = rbuf;
125 door_args.rsize = sizeof (rbuf);
126
127 ret_val = door_call(door_fd, &door_args);
128 (void) close(door_fd);
129 if (ret_val < 0) {
130 return (0);
131 }
132 DPRINTF3("rsize = %d data_size = %d data_ptr = %p \n",
133 door_args.rsize, door_args.data_size,
134 door_args.data_ptr);
135 retping = (smedia_retping_t *)(
136 (void *)door_args.data_ptr);
137 if (retping->cnum != SMEDIA_CNUM_PING) {
138 DPRINTF1("*** door call failed *** cnum "
139 "returned = 0x%x\n", retping->cnum);
140 return (0);
141 }
142 return (1);
143 }
144 server_info = smserverproc_get_serverinfo_1(NULL, clnt);
145 if (server_info == NULL) {
146 if (clnt)
147 clnt_destroy(clnt);
148 return (0);
149 }
150 if (server_info->status != 0) {
151 if (clnt)
152 clnt_destroy(clnt);
153 DPRINTF1("get server_info call failed. "
154 "status = %d\n", server_info->status);
155 return (0);
156 }
157 if (server_info->vernum != SMSERVERVERS) {
158 if (clnt)
159 clnt_destroy(clnt);
160 DPRINTF2("version expected = %d version "
161 "returned = %d\n", SMSERVERVERS,
162 server_info->vernum);
163 return (0);
164 }
165
166 door_fd = open(smedia_service, O_RDONLY, 0644);
167 if (door_fd < 0) {
168 DPRINTF1("Error in opening %s\n", smedia_service);
169 return (0);
170 }
171
172 DPRINTF1("rbuf address=%p\n", rbuf);
173 reqping.cnum = SMEDIA_CNUM_PING;
174 door_args.data_ptr = (char *)&reqping;
175 door_args.data_size = sizeof (smedia_services_t);
176 door_args.desc_ptr = NULL;
177 door_args.desc_num = 0;
178 door_args.rbuf = rbuf;
179 door_args.rsize = sizeof (rbuf);
180
181 ret_val = door_call(door_fd, &door_args);
182 (void) close(door_fd);
183 if (ret_val < 0) {
184 return (0);
185 }
186 DPRINTF3("rsize = %d data_size = %d data_ptr = %p \n",
187 door_args.rsize, door_args.data_size,
188 door_args.data_ptr);
189 retping = (smedia_retping_t *)((void *)door_args.data_ptr);
190 if (retping->cnum != SMEDIA_CNUM_PING) {
191 DPRINTF1("*** door call failed *** cnum returned "
192 "= 0x%x\n", retping->cnum);
193 return (0);
194 }
195 handle->sm_clnt = clnt;
196 return (1);
197 }
198
199 static void *
get_dev_library_handle(int32_t fd)200 get_dev_library_handle(int32_t fd)
201 {
202 void *handle;
203 void *old_handle = NULL;
204 struct dk_cinfo dkinfo;
205 DIR *dirp;
206 struct dirent *dp;
207 char *pathname;
208 int32_t (*d_fcn_ptr)(ushort_t, ushort_t);
209 int32_t (*v_fcn_ptr)(void);
210 int32_t ret_val;
211
212 if (ioctl(fd, DKIOCINFO, &dkinfo) == -1) {
213 PERROR("DKIOCINFO failed");
214 return (NULL);
215 }
216 DPRINTF1("dki_ctype = 0x%x\n", dkinfo.dki_ctype);
217
218 if ((pathname = malloc(PATH_MAX)) == NULL) {
219 PERROR("malloc failed");
220 return (NULL);
221 }
222
223 dirp = opendir(PATHNAME);
224 if (dirp == NULL) {
225 (void) fprintf(stderr, gettext("Couldnot open %s\n"), PATHNAME);
226 free(pathname);
227 return (NULL);
228 }
229
230 while ((dp = readdir(dirp)) != NULL) {
231 if (strncmp("sm_", dp->d_name, 3) != 0) {
232 DPRINTF1("not a library %s\n", dp->d_name);
233 continue;
234 }
235 if (snprintf(pathname, PATH_MAX, "%s/%s",
236 PATHNAME, dp->d_name) >= PATH_MAX) {
237 continue;
238 }
239
240 handle = dlopen(pathname, RTLD_LAZY);
241 if (handle == NULL) {
242 PERROR("Error opening library file");
243 continue;
244 }
245 d_fcn_ptr = (int32_t (*)(ushort_t, ushort_t))dlsym(handle,
246 "_m_device_type");
247 if (d_fcn_ptr == NULL) {
248 DPRINTF("Could not find _m_device_type\n");
249 (void) dlclose(handle);
250 continue;
251 }
252 ret_val = (*d_fcn_ptr)(dkinfo.dki_ctype, 0);
253 if (ret_val == 0) {
254 DPRINTF1("NAME %s\n", dp->d_name);
255 v_fcn_ptr = (int32_t (*)(void))dlsym(handle,
256 "_m_version_no");
257 if (v_fcn_ptr == NULL) {
258 DPRINTF("Could not find _m_version_no\n");
259 (void) dlclose(handle);
260 continue;
261 }
262 ret_val = (*v_fcn_ptr)();
263 if ((ret_val >= 0) &&
264 (ret_val >= SM_PLUGIN_VERSION)) {
265 if (old_handle != NULL)
266 (void) dlclose(old_handle);
267 old_handle = handle;
268 continue;
269 } else {
270 (void) dlclose(handle);
271 }
272 } else {
273 (void) dlclose(handle);
274 }
275 }
276 free(pathname);
277 (void) closedir(dirp);
278 return (old_handle);
279 }
280
281 int32_t
call_function(rmedia_handle_t * handle,void * ip,char * func_name)282 call_function(rmedia_handle_t *handle, void *ip, char *func_name)
283 {
284
285 int32_t ret_val;
286 int32_t (*fcn_ptr)(rmedia_handle_t *handle, void *ip);
287 void *lib_handle;
288
289 if (handle == NULL) {
290 DPRINTF("Handle is NULL\n");
291 errno = EINVAL;
292 return (-1);
293 }
294 lib_handle = handle->sm_lib_handle;
295 if (handle->sm_signature != LIBSMEDIA_SIGNATURE) {
296 DPRINTF2("call_function:signature expected=0x%x, found=0x%x\n",
297 LIBSMEDIA_SIGNATURE, handle->sm_signature);
298 errno = EINVAL;
299 return (-1);
300 }
301
302 fcn_ptr = (int32_t (*)(rmedia_handle_t *, void*))
303 dlsym(lib_handle, func_name);
304 if (fcn_ptr == NULL) {
305 DPRINTF1("Could not find %s\n", func_name);
306 errno = ENOTSUP;
307 return (-1);
308 }
309 ret_val = (*fcn_ptr)(handle, ip);
310 return (ret_val);
311 }
312
313 int32_t
release_handle(rmedia_handle_t * handle)314 release_handle(rmedia_handle_t *handle)
315 {
316 if (handle == NULL) {
317 DPRINTF("Handle is NULL\n");
318 errno = EINVAL;
319 return (-1);
320 }
321 if ((handle->sm_dkinfo.dki_ctype == DKC_SCSI_CCS) ||
322 (handle->sm_dkinfo.dki_ctype == DKC_MD21) ||
323 (handle->sm_dkinfo.dki_ctype == DKC_CDROM)) {
324 (void) close(handle->sm_door);
325 (void) close(handle->sm_death_door);
326 if (handle->sm_buf != NULL)
327 (void) munmap(handle->sm_buf, handle->sm_bufsize);
328 if (handle->sm_clnt != NULL)
329 clnt_destroy(handle->sm_clnt);
330 }
331 (void) close(handle->sm_buffd);
332 handle->sm_signature = 0;
333 (void) dlclose(handle->sm_lib_handle);
334 free(handle);
335 return (0);
336 }
337
338 smedia_handle_t
get_handle_from_fd(int32_t fd)339 get_handle_from_fd(int32_t fd)
340 {
341 rmedia_handle_t *handle;
342 void *lib_handle;
343 int door_fd, door_server;
344 int ret_val;
345 door_arg_t door_args;
346 smedia_reqopen_t reqopen;
347 smedia_reterror_t *reterror;
348 door_desc_t ddesc[2];
349 char rbuf[sizeof (smedia_services_t) + sizeof (door_desc_t)];
350 struct stat stat;
351
352 DPRINTF("smedia_get_handle called\n");
353 handle = (rmedia_handle_t *)malloc(sizeof (rmedia_handle_t));
354 if (handle == NULL) {
355 DPRINTF("Could not allocate memory for handle\n");
356 return (NULL);
357 }
358 (void) memset((void *) handle, 0, sizeof (rmedia_handle_t));
359 handle->sm_fd = -1;
360 handle->sm_door = -1;
361 handle->sm_death_door = -1;
362 handle->sm_buffd = -1;
363 handle->sm_buf = NULL;
364 handle->sm_bufsize = 0;
365
366 if (ioctl(fd, DKIOCINFO, &handle->sm_dkinfo) == -1) {
367 free(handle);
368 PERROR("DKIOCINFO failed");
369 return (NULL);
370 }
371 lib_handle = get_dev_library_handle(fd);
372 if (lib_handle == NULL) {
373 free(handle);
374 DPRINTF("lib_Handle is NULL\n");
375 errno = ENOTSUP;
376 return (NULL);
377 }
378 DPRINTF("Handle initialised successfully.\n");
379 /* Initialise the handle elements */
380 handle->sm_lib_handle = lib_handle;
381 handle->sm_signature = LIBSMEDIA_SIGNATURE;
382 DPRINTF2("fd=%d signature=0x%x\n", handle->sm_fd, handle->sm_signature);
383
384 if ((handle->sm_dkinfo.dki_ctype == DKC_SCSI_CCS) ||
385 (handle->sm_dkinfo.dki_ctype == DKC_MD21) ||
386 (handle->sm_dkinfo.dki_ctype == DKC_CDROM)) {
387
388 ret_val = is_server_running(handle);
389 if (ret_val == 0) {
390 (void) dlclose(handle->sm_lib_handle);
391 free(handle);
392 return (NULL);
393 }
394 door_fd = open(smedia_service, O_RDONLY, 0644);
395 if (door_fd < 0) {
396 (void) dlclose(handle->sm_lib_handle);
397 free(handle);
398 if (handle->sm_clnt)
399 clnt_destroy(handle->sm_clnt);
400 DPRINTF1("Error in opening %s\n", smedia_service);
401 PERROR(smedia_service);
402 return (NULL);
403 }
404
405 DPRINTF1("rbuf address=%p\n", rbuf);
406 ddesc[0].d_data.d_desc.d_descriptor = fd;
407 ddesc[0].d_attributes = DOOR_DESCRIPTOR;
408 reqopen.cnum = SMEDIA_CNUM_OPEN_FD;
409 door_args.data_ptr = (char *)&reqopen;
410 door_args.data_size = sizeof (smedia_services_t);
411 door_args.desc_ptr = &ddesc[0];
412 door_args.desc_num = 1;
413 door_args.rbuf = rbuf;
414 door_args.rsize = sizeof (rbuf);
415
416 ret_val = door_call(door_fd, &door_args);
417 (void) close(door_fd);
418 if (ret_val < 0) {
419 (void) dlclose(handle->sm_lib_handle);
420 free(handle);
421 if (handle->sm_clnt)
422 clnt_destroy(handle->sm_clnt);
423 PERROR("door_call");
424 return (NULL);
425 }
426 DPRINTF3("rsize = %d data_size = %d data_ptr = %p \n",
427 door_args.rsize, door_args.data_size,
428 door_args.data_ptr);
429 reterror = (smedia_reterror_t *)((void *)door_args.data_ptr);
430 if (reterror->cnum != SMEDIA_CNUM_OPEN_FD) {
431 (void) dlclose(handle->sm_lib_handle);
432 free(handle);
433 if (handle->sm_clnt)
434 clnt_destroy(handle->sm_clnt);
435 DPRINTF1(
436 "*** door call failed *** cnum returned = 0x%x\n", reterror->cnum);
437 errno = reterror->errnum;
438 return (NULL);
439 }
440 /*
441 * 2 door descriptors are returned after the above door call.
442 * The first door descriptor is the one that will be used
443 * in subsequent smedia calls. A dedicated thread is
444 * associated with this door to handle client calls.
445 * The second door descriptor is needed to signal unexpected
446 * death of the client to the server. This will help the server
447 * to do the necessary cleanup.
448 */
449 if (door_args.desc_num != 2) {
450 (void) dlclose(handle->sm_lib_handle);
451 free(handle);
452 if (handle->sm_clnt)
453 clnt_destroy(handle->sm_clnt);
454 DPRINTF("Num of door descriptors returned by "
455 "server is not 2");
456 if (door_args.desc_num)
457 (void) close(door_args.desc_ptr->\
458 d_data.d_desc.d_descriptor);
459 return (NULL);
460 }
461 door_server = door_args.desc_ptr->d_data.d_desc.d_descriptor;
462 /* Check if the descriptor returned is S_IFDOOR */
463 if (fstat(door_server, &stat) < 0) {
464 PERROR("fstat");
465 (void) dlclose(handle->sm_lib_handle);
466 free(handle);
467 if (handle->sm_clnt)
468 clnt_destroy(handle->sm_clnt);
469 return (NULL);
470 }
471 if (!S_ISDOOR(stat.st_mode)) {
472 DPRINTF(
473 "Descriptor returned by door_call is not of type DOOR\n");
474 (void) dlclose(handle->sm_lib_handle);
475 free(handle);
476 if (handle->sm_clnt)
477 clnt_destroy(handle->sm_clnt);
478 return (NULL);
479 }
480 handle->sm_door = door_server;
481 handle->sm_fd = fd;
482 door_args.desc_ptr++;
483 handle->sm_death_door =
484 door_args.desc_ptr->d_data.d_desc.d_descriptor;
485 DPRINTF("door call succeeded.\n");
486 return ((smedia_handle_t)handle);
487
488 } else {
489 handle->sm_fd = fd;
490 return ((smedia_handle_t)handle);
491 }
492
493 }
494