2 * This file handles accepting Director Commands
4 * Most Director commands are handled here, with the
5 * exception of the Job command command and subsequent
6 * subcommands that are handled
9 * N.B. in this file, in general we must use P(dev->mutex) rather
10 * than lock_device(dev) so that we can examine the blocked
11 * state rather than blocking ourselves. In some "safe" cases,
12 * we can do things to a blocked device. CAREFUL!!!!
14 * File daemon commands are handled in fdcmd.c
16 * Kern Sibbald, May MMI
22 Copyright (C) 2001-2004 Kern Sibbald and John Walker
24 This program is free software; you can redistribute it and/or
25 modify it under the terms of the GNU General Public License as
26 published by the Free Software Foundation; either version 2 of
27 the License, or (at your option) any later version.
29 This program is distributed in the hope that it will be useful,
30 but WITHOUT ANY WARRANTY; without even the implied warranty of
31 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
32 General Public License for more details.
34 You should have received a copy of the GNU General Public
35 License along with this program; if not, write to the Free
36 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
44 /* Exported variables */
46 /* Imported variables */
47 extern BSOCK *filed_chan;
48 extern int r_first, r_last;
49 extern struct s_res resources[];
50 extern char my_name[];
51 extern time_t daemon_start_time;
52 extern struct s_last_job last_job;
54 /* Static variables */
55 static char derrmsg[] = "3900 Invalid command\n";
56 static char OKsetdebug[] = "3000 OK setdebug=%d\n";
57 static char illegal_cmd[] = "3997 Illegal command for a Director with Monitor directive enabled\n";
59 /* Imported functions */
60 extern void terminate_child();
61 extern bool job_cmd(JCR *jcr);
62 extern bool status_cmd(JCR *sjcr);
63 extern bool qstatus_cmd(JCR *jcr);
65 /* Forward referenced functions */
66 static bool label_cmd(JCR *jcr);
67 static bool relabel_cmd(JCR *jcr);
68 static bool readlabel_cmd(JCR *jcr);
69 static bool release_cmd(JCR *jcr);
70 static bool setdebug_cmd(JCR *jcr);
71 static bool cancel_cmd(JCR *cjcr);
72 static bool mount_cmd(JCR *jcr);
73 static bool unmount_cmd(JCR *jcr);
74 static bool autochanger_cmd(JCR *sjcr);
75 static bool do_label(JCR *jcr, int relabel);
76 static DEVICE *find_device(JCR *jcr, POOL_MEM &dname);
77 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot);
78 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
79 char *newname, char *poolname,
80 int Slot, int relabel);
81 static bool try_autoload_device(JCR *jcr, int slot, const char *VolName);
85 bool (*func)(JCR *jcr);
86 int monitoraccess; /* specify if monitors have access to this function */
90 * The following are the recognized commands from the Director.
92 static struct s_cmds cmds[] = {
93 {"JobId=", job_cmd, 0}, /* start Job */
94 {"autochanger", autochanger_cmd, 0},
95 {"bootstrap", bootstrap_cmd, 0},
96 {"cancel", cancel_cmd, 0},
97 {"label", label_cmd, 0}, /* label a tape */
98 {"mount", mount_cmd, 0},
99 {"readlabel", readlabel_cmd, 0},
100 {"release", release_cmd, 0},
101 {"relabel", relabel_cmd, 0}, /* relabel a tape */
102 {"setdebug=", setdebug_cmd, 0}, /* set debug level */
103 {"status", status_cmd, 1},
104 {".status", qstatus_cmd, 1},
105 {"unmount", unmount_cmd, 0},
106 {NULL, NULL} /* list terminator */
111 * Connection request. We accept connections either from the
112 * Director or a Client (File daemon).
114 * Note, we are running as a seperate thread of the Storage daemon.
115 * and it is because a Director has made a connection with
116 * us on the "Message" channel.
118 * Basic tasks done here:
119 * - Create a JCR record
120 * - If it was from the FD, call handle_filed_connection()
121 * - Authenticate the Director
122 * - We wait for a command
123 * - We execute the command
124 * - We continue or exit depending on the return status
126 void *handle_connection_request(void *arg)
128 BSOCK *bs = (BSOCK *)arg;
133 char name[MAX_NAME_LENGTH];
135 if (bnet_recv(bs) <= 0) {
136 Emsg0(M_ERROR, 0, _("Connection request failed.\n"));
142 * Do a sanity check on the message received
144 if (bs->msglen < 25 || bs->msglen > (int)sizeof(name)-25) {
145 Emsg1(M_ERROR, 0, _("Invalid connection. Len=%d\n"), bs->msglen);
150 * See if this is a File daemon connection. If so
153 Dmsg1(110, "Conn: %s", bs->msg);
154 if (sscanf(bs->msg, "Hello Start Job %127s", name) == 1) {
155 handle_filed_connection(bs, name);
159 Dmsg0(110, "Start Dir Job\n");
160 jcr = new_jcr(sizeof(JCR), stored_free_jcr); /* create Job Control Record */
161 jcr->dir_bsock = bs; /* save Director bsock */
162 jcr->dir_bsock->jcr = jcr;
163 /* Initialize FD start condition variable */
164 int errstat = pthread_cond_init(&jcr->job_start_wait, NULL);
166 Jmsg1(jcr, M_FATAL, 0, _("Unable to init job cond variable: ERR=%s\n"), strerror(errstat));
170 Dmsg0(1000, "stored in start_job\n");
173 * Authenticate the Director
175 if (!authenticate_director(jcr)) {
176 Jmsg(jcr, M_FATAL, 0, _("Unable to authenticate Director\n"));
179 Dmsg0(90, "Message channel init completed.\n");
181 for (quit=0; !quit;) {
183 if ((bnet_stat = bnet_recv(bs)) <= 0) {
184 break; /* connection terminated */
186 Dmsg1(199, "<dird: %s\n", bs->msg);
188 for (i=0; cmds[i].cmd; i++) {
189 if (strncmp(cmds[i].cmd, bs->msg, strlen(cmds[i].cmd)) == 0) {
190 if ((!cmds[i].monitoraccess) && (jcr->director->monitor)) {
191 Dmsg1(100, "Command %s illegal.\n", cmds[i].cmd);
192 bnet_fsend(bs, illegal_cmd);
193 bnet_sig(bs, BNET_EOD);
196 if (!cmds[i].func(jcr)) { /* do command */
197 quit = true; /* error, get out */
198 Dmsg1(190, "Command %s requsts quit\n", cmds[i].cmd);
200 found = true; /* indicate command found */
204 if (!found) { /* command not found */
205 bnet_fsend(bs, derrmsg);
210 dequeue_messages(jcr); /* send any queued messages */
211 bnet_sig(bs, BNET_TERMINATE);
217 * Set debug level as requested by the Director
220 static bool setdebug_cmd(JCR *jcr)
222 BSOCK *dir = jcr->dir_bsock;
223 int level, trace_flag;
225 Dmsg1(10, "setdebug_cmd: %s", dir->msg);
226 if (sscanf(dir->msg, "setdebug=%d trace=%d", &level, &trace_flag) != 2 || level < 0) {
227 bnet_fsend(dir, "3991 Bad setdebug command: %s\n", dir->msg);
231 set_trace(trace_flag);
232 return bnet_fsend(dir, OKsetdebug, level);
239 static bool cancel_cmd(JCR *cjcr)
241 BSOCK *dir = cjcr->dir_bsock;
243 char Job[MAX_NAME_LENGTH];
246 if (sscanf(dir->msg, "cancel Job=%127s", Job) == 1) {
247 if (!(jcr=get_jcr_by_full_name(Job))) {
248 bnet_fsend(dir, _("3992 Job %s not found.\n"), Job);
251 oldStatus = jcr->JobStatus;
252 set_jcr_job_status(jcr, JS_Canceled);
253 if (!jcr->authenticated && oldStatus == JS_WaitFD) {
254 pthread_cond_signal(&jcr->job_start_wait); /* wake waiting thread */
257 if (jcr->file_bsock) {
258 bnet_sig(jcr->file_bsock, BNET_TERMINATE);
260 /* If thread waiting on mount, wake him */
261 if (jcr->dcr && jcr->dcr->dev &&
262 (jcr->dcr->dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
263 jcr->dcr->dev->dev_blocked == BST_UNMOUNTED ||
264 jcr->dcr->dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
265 pthread_cond_signal(&jcr->dcr->dev->wait_next_vol);
267 bnet_fsend(dir, _("3000 Job %s marked to be canceled.\n"), jcr->Job);
271 bnet_fsend(dir, _("3993 Error scanning cancel command.\n"));
273 bnet_sig(dir, BNET_EOD);
281 static bool label_cmd(JCR *jcr)
283 return do_label(jcr, 0);
286 static bool relabel_cmd(JCR *jcr)
288 return do_label(jcr, 1);
291 static bool do_label(JCR *jcr, int relabel)
293 POOLMEM *newname, *oldname, *poolname, *mtype;
295 BSOCK *dir = jcr->dir_bsock;
300 newname = get_memory(dir->msglen+1);
301 oldname = get_memory(dir->msglen+1);
302 poolname = get_memory(dir->msglen+1);
303 mtype = get_memory(dir->msglen+1);
305 if (sscanf(dir->msg, "relabel %127s OldName=%127s NewName=%127s PoolName=%127s MediaType=%127s Slot=%d",
306 dname.c_str(), oldname, newname, poolname, mtype, &slot) == 6) {
311 if (sscanf(dir->msg, "label %127s VolumeName=%127s PoolName=%127s MediaType=%127s Slot=%d",
312 dname.c_str(), newname, poolname, mtype, &slot) == 5) {
317 unbash_spaces(newname);
318 unbash_spaces(oldname);
319 unbash_spaces(poolname);
320 unbash_spaces(mtype);
321 dev = find_device(jcr, dname);
323 /******FIXME**** compare MediaTypes */
324 P(dev->mutex); /* Use P to avoid indefinite block */
325 if (!(dev->state & ST_OPENED)) {
326 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
327 force_close_dev(dev);
328 /* Under certain "safe" conditions, we can steal the lock */
329 } else if (dev->dev_blocked &&
330 (dev->dev_blocked == BST_UNMOUNTED ||
331 dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
332 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
333 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
334 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
335 if (dev_state(dev, ST_READ)) {
336 bnet_fsend(dir, _("3911 Device %s is busy with 1 reader.\n"),
339 bnet_fsend(dir, _("3912 Device %s is busy with %d writer(s).\n"),
340 dev_name(dev), dev->num_writers);
342 } else { /* device not being used */
343 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
347 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), dname.c_str());
350 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
351 pm_strcpy(jcr->errmsg, dir->msg);
352 bnet_fsend(dir, _("3903 Error scanning label command: %s\n"), jcr->errmsg);
354 free_memory(oldname);
355 free_memory(newname);
356 free_memory(poolname);
358 bnet_sig(dir, BNET_EOD);
363 * Read the tape label and determine if we can safely
364 * label the tape (not a Bacula volume), then label it.
366 * Enter with the mutex set
368 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
369 char *newname, char *poolname,
370 int slot, int relabel)
372 BSOCK *dir = jcr->dir_bsock;
378 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
380 if (!try_autoload_device(jcr, slot, newname)) {
381 goto bail_out; /* error */
384 /* See what we have for a Volume */
385 label_status = read_dev_volume_label(dcr);
386 switch(label_status) {
388 case VOL_VERSION_ERROR:
389 case VOL_LABEL_ERROR:
393 "3911 Cannot label Volume because it is already labeled: \"%s\"\n"),
394 dev->VolHdr.VolName);
397 /* Relabel request. If oldname matches, continue */
398 if (strcmp(oldname, dev->VolHdr.VolName) != 0) {
399 bnet_fsend(dir, _("Wrong volume mounted.\n"));
402 /* Fall through wanted! */
405 if (!write_new_volume_label_to_dev(dcr, newname, poolname)) {
406 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
409 bstrncpy(dcr->VolumeName, newname, sizeof(dcr->VolumeName));
410 /* The following 3000 OK label. string is scanned in ua_label.c */
411 bnet_fsend(dir, "3000 OK label. Volume=%s Device=%s\n",
412 newname, dev_name(dev));
415 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
418 bnet_fsend(dir, _("3913 Cannot label Volume. \
419 Unknown status %d from read_volume_label()\n"), label_status);
424 give_back_device_lock(dev, &hold);
430 * Read the tape label
432 * Enter with the mutex set
434 static bool read_label(DCR *dcr)
438 BSOCK *dir = jcr->dir_bsock;
440 DEVICE *dev = dcr->dev;
442 steal_device_lock(dev, &hold, BST_DOING_ACQUIRE);
444 dcr->VolumeName[0] = 0;
445 dev->state &= ~ST_LABEL; /* force read of label */
446 switch (read_dev_volume_label(dcr)) {
448 bnet_fsend(dir, _("3001 Mounted Volume: %s\n"), dev->VolHdr.VolName);
452 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device \"%s\" because:\n%s"),
453 dev_name(dev), jcr->errmsg);
457 give_back_device_lock(dev, &hold);
461 static DEVICE *find_device(JCR *jcr, POOL_MEM &dname)
466 unbash_spaces(dname);
468 foreach_res(device, R_DEVICE) {
469 /* Find resource, and make sure we were able to open it */
470 if (strcmp(device->hdr.name, dname.c_str()) == 0 && device->dev) {
471 Dmsg1(20, "Found device %s\n", device->hdr.name);
472 jcr->device = device;
479 * ****FIXME***** device->dev may not point to right device
480 * if there are multiple devices open
482 jcr->dcr = new_dcr(jcr, device->dev);
484 return jcr->dcr->dev;
492 * Mount command from Director
494 static bool mount_cmd(JCR *jcr)
497 BSOCK *dir = jcr->dir_bsock;
501 if (sscanf(dir->msg, "mount %127s", dname.c_str()) == 1) {
502 dev = find_device(jcr, dname);
505 P(dev->mutex); /* Use P to avoid indefinite block */
506 switch (dev->dev_blocked) { /* device blocked? */
507 case BST_WAITING_FOR_SYSOP:
508 /* Someone is waiting, wake him */
509 Dmsg0(100, "Waiting for mount. Attempting to wake thread\n");
510 dev->dev_blocked = BST_MOUNT;
511 bnet_fsend(dir, "3001 OK mount. Device=%s\n", dev_name(dev));
512 pthread_cond_signal(&dev->wait_next_vol);
515 /* In both of these two cases, we (the user) unmounted the Volume */
516 case BST_UNMOUNTED_WAITING_FOR_SYSOP:
518 /* We freed the device, so reopen it and wake any waiting threads */
519 if (open_dev(dev, NULL, OPEN_READ_WRITE) < 0) {
520 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
524 read_dev_volume_label(dcr);
525 if (dev->dev_blocked == BST_UNMOUNTED) {
526 /* We blocked the device, so unblock it */
527 Dmsg0(100, "Unmounted. Unblocking device\n");
528 read_label(dcr); /* this should not be necessary */
531 Dmsg0(100, "Unmounted waiting for mount. Attempting to wake thread\n");
532 dev->dev_blocked = BST_MOUNT;
534 if (dev_state(dev, ST_LABEL)) {
535 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
536 dev_name(dev), dev->VolHdr.VolName);
538 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
539 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
542 pthread_cond_signal(&dev->wait_next_vol);
545 case BST_DOING_ACQUIRE:
546 bnet_fsend(dir, _("3001 Device %s is mounted; doing acquire.\n"),
550 case BST_WRITING_LABEL:
551 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"), dev_name(dev));
554 case BST_NOT_BLOCKED:
555 if (dev_state(dev, ST_OPENED)) {
556 if (dev_state(dev, ST_LABEL)) {
557 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
558 dev_name(dev), dev->VolHdr.VolName);
560 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
561 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
565 if (!dev_is_tape(dev)) {
566 bnet_fsend(dir, _("3906 cannot mount non-tape.\n"));
569 if (open_dev(dev, NULL, OPEN_READ_WRITE) < 0) {
570 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
575 if (dev_state(dev, ST_LABEL)) {
576 bnet_fsend(dir, _("3001 Device %s is already mounted with Volume \"%s\"\n"),
577 dev_name(dev), dev->VolHdr.VolName);
579 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
580 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
587 bnet_fsend(dir, _("3905 Bizarre wait state %d\n"), dev->dev_blocked);
592 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), dname.c_str());
595 pm_strcpy(jcr->errmsg, dir->msg);
596 bnet_fsend(dir, _("3909 Error scanning mount command: %s\n"), jcr->errmsg);
598 bnet_sig(dir, BNET_EOD);
603 * unmount command from Director
605 static bool unmount_cmd(JCR *jcr)
608 BSOCK *dir = jcr->dir_bsock;
611 if (sscanf(dir->msg, "unmount %127s", dname.c_str()) == 1) {
612 dev = find_device(jcr, dname);
614 P(dev->mutex); /* Use P to avoid indefinite block */
615 if (!(dev->state & ST_OPENED)) {
616 Dmsg0(90, "Device already unmounted\n");
617 bnet_fsend(dir, _("3901 Device \"%s\" is already unmounted.\n"), dev_name(dev));
619 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP) {
620 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
622 open_dev(dev, NULL, 0); /* fake open for close */
623 offline_or_rewind_dev(dev);
624 force_close_dev(dev);
625 dev->dev_blocked = BST_UNMOUNTED_WAITING_FOR_SYSOP;
626 bnet_fsend(dir, _("3001 Device \"%s\" unmounted.\n"), dev_name(dev));
628 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
629 bnet_fsend(dir, _("3902 Device \"%s\" is busy in acquire.\n"), dev_name(dev));
631 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
632 bnet_fsend(dir, _("3903 Device \"%s\" is being labeled.\n"), dev_name(dev));
634 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
635 if (dev_state(dev, ST_READ)) {
636 Dmsg0(90, "Device in read mode\n");
637 bnet_fsend(dir, _("3904 Device \"%s\" is busy reading.\n"), dev_name(dev));
639 Dmsg1(90, "Device busy with %d writers\n", dev->num_writers);
640 bnet_fsend(dir, _("3905 Device %s is busy with %d writer(s).\n"),
641 dev_name(dev), dev->num_writers);
644 } else { /* device not being used */
645 Dmsg0(90, "Device not in use, unmounting\n");
646 /* On FreeBSD, I am having ASSERT() failures in block_device()
647 * and I can only imagine that the thread id that we are
648 * leaving in no_wait_id is being re-used. So here,
649 * we simply do it by hand. Gross, but a solution.
651 /* block_device(dev, BST_UNMOUNTED); replace with 2 lines below */
652 dev->dev_blocked = BST_UNMOUNTED;
654 open_dev(dev, NULL, 0); /* fake open for close */
655 offline_or_rewind_dev(dev);
656 force_close_dev(dev);
657 bnet_fsend(dir, _("3002 Device %s unmounted.\n"), dev_name(dev));
661 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), dname.c_str());
664 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
665 pm_strcpy(jcr->errmsg, dir->msg);
666 bnet_fsend(dir, _("3907 Error scanning unmount command: %s\n"), jcr->errmsg);
668 bnet_sig(dir, BNET_EOD);
673 * Release command from Director. This rewinds the device and if
674 * configured does a offline and ensures that Bacula will
675 * re-read the label of the tape before continuing. This gives
676 * the operator the chance to change the tape anytime before the
679 static bool release_cmd(JCR *jcr)
682 BSOCK *dir = jcr->dir_bsock;
685 if (sscanf(dir->msg, "release %127s", dname.c_str()) == 1) {
686 dev = find_device(jcr, dname);
688 P(dev->mutex); /* Use P to avoid indefinite block */
689 if (!(dev->state & ST_OPENED)) {
690 Dmsg0(90, "Device already released\n");
691 bnet_fsend(dir, _("3911 Device %s already released.\n"), dev_name(dev));
693 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
694 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP) {
695 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
697 bnet_fsend(dir, _("3912 Device %s waiting for mount.\n"), dev_name(dev));
699 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
700 bnet_fsend(dir, _("3913 Device %s is busy in acquire.\n"), dev_name(dev));
702 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
703 bnet_fsend(dir, _("3914 Device %s is being labeled.\n"), dev_name(dev));
705 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
706 if (dev_state(dev, ST_READ)) {
707 Dmsg0(90, "Device in read mode\n");
708 bnet_fsend(dir, _("3915 Device %s is busy with 1 reader.\n"), dev_name(dev));
710 Dmsg1(90, "Device busy with %d writers\n", dev->num_writers);
711 bnet_fsend(dir, _("3916 Device %s is busy with %d writer(s).\n"),
712 dev_name(dev), dev->num_writers);
715 } else { /* device not being used */
716 Dmsg0(90, "Device not in use, unmounting\n");
717 release_volume(jcr->dcr);
718 bnet_fsend(dir, _("3012 Device %s released.\n"), dev_name(dev));
722 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), dname.c_str());
725 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
726 pm_strcpy(jcr->errmsg, dir->msg);
727 bnet_fsend(dir, _("3917 Error scanning release command: %s\n"), jcr->errmsg);
729 bnet_sig(dir, BNET_EOD);
736 * Autochanger command from Director
738 static bool autochanger_cmd(JCR *jcr)
741 BSOCK *dir = jcr->dir_bsock;
745 if (sscanf(dir->msg, "autochanger list %127s ", dname.c_str()) == 1) {
746 dev = find_device(jcr, dname);
749 P(dev->mutex); /* Use P to avoid indefinite block */
750 if (!dev_is_tape(dev)) {
751 bnet_fsend(dir, _("3995 Device %s is not an autochanger.\n"), dev_name(dev));
752 } else if (!(dev->state & ST_OPENED)) {
753 autochanger_list(dcr, dir);
754 /* Under certain "safe" conditions, we can steal the lock */
755 } else if (dev->dev_blocked &&
756 (dev->dev_blocked == BST_UNMOUNTED ||
757 dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
758 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
759 autochanger_list(dcr, dir);
760 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
761 if (dev_state(dev, ST_READ)) {
762 bnet_fsend(dir, _("3901 Device %s is busy with 1 reader.\n"), dev_name(dev));
764 bnet_fsend(dir, _("3902 Device %s is busy with %d writer(s).\n"),
765 dev_name(dev), dev->num_writers);
767 } else { /* device not being used */
768 autochanger_list(dcr, dir);
772 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), dname.c_str());
774 } else { /* error on scanf */
775 pm_strcpy(jcr->errmsg, dir->msg);
776 bnet_fsend(dir, _("3908 Error scanning autocharger list command: %s\n"),
779 bnet_sig(dir, BNET_EOD);
784 * Read and return the Volume label
786 static bool readlabel_cmd(JCR *jcr)
789 BSOCK *dir = jcr->dir_bsock;
793 if (sscanf(dir->msg, "readlabel %127s Slot=%d", dname.c_str(), &Slot) == 2) {
794 dev = find_device(jcr, dname);
796 P(dev->mutex); /* Use P to avoid indefinite block */
797 if (!dev_state(dev, ST_OPENED)) {
798 read_volume_label(jcr, dev, Slot);
799 force_close_dev(dev);
800 /* Under certain "safe" conditions, we can steal the lock */
801 } else if (dev->dev_blocked &&
802 (dev->dev_blocked == BST_UNMOUNTED ||
803 dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
804 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
805 read_volume_label(jcr, dev, Slot);
806 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
807 if (dev_state(dev, ST_READ)) {
808 bnet_fsend(dir, _("3911 Device %s is busy with 1 reader.\n"),
811 bnet_fsend(dir, _("3912 Device %s is busy with %d writer(s).\n"),
812 dev_name(dev), dev->num_writers);
814 } else { /* device not being used */
815 read_volume_label(jcr, dev, Slot);
819 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), dname.c_str());
822 pm_strcpy(jcr->errmsg, dir->msg);
823 bnet_fsend(dir, _("3909 Error scanning readlabel command: %s\n"), jcr->errmsg);
825 bnet_sig(dir, BNET_EOD);
830 * Read the tape label
832 * Enter with the mutex set
834 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot)
836 BSOCK *dir = jcr->dir_bsock;
841 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
843 if (!try_autoload_device(jcr, Slot, "")) {
844 goto bail_out; /* error */
847 dev->state &= ~ST_LABEL; /* force read of label */
848 switch (read_dev_volume_label(dcr)) {
850 /* DO NOT add quotes around the Volume name. It is scanned in the DIR */
851 bnet_fsend(dir, _("3001 Volume=%s Slot=%d\n"), dev->VolHdr.VolName, Slot);
852 Dmsg1(100, "Volume: %s\n", dev->VolHdr.VolName);
855 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device \"%s\" because:\n%s"),
856 dev_name(dev), jcr->errmsg);
861 give_back_device_lock(dev, &hold);
865 static bool try_autoload_device(JCR *jcr, int slot, const char *VolName)
868 BSOCK *dir = jcr->dir_bsock;
869 DEVICE *dev = dcr->dev;
871 bstrncpy(dcr->VolumeName, VolName, sizeof(dcr->VolumeName));
872 dcr->VolCatInfo.Slot = slot;
873 dcr->VolCatInfo.InChanger = slot > 0;
874 if (autoload_device(dcr, 0, dir) < 0) { /* autoload if possible */
878 /* Ensure that the device is open -- autoload_device() closes it */
879 for ( ; !(dev->state & ST_OPENED); ) {
880 if (open_dev(dev, dcr->VolumeName, OPEN_READ_WRITE) < 0) {
881 bnet_fsend(dir, _("3910 Unable to open device %s. ERR=%s\n"),
882 dev_name(dev), strerror_dev(dev));