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) 2000-2004 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";
59 /* Imported functions */
60 extern void terminate_child();
61 extern int job_cmd(JCR *jcr);
62 extern int status_cmd(JCR *sjcr);
64 /* Forward referenced functions */
65 static int label_cmd(JCR *jcr);
66 static int relabel_cmd(JCR *jcr);
67 static int readlabel_cmd(JCR *jcr);
68 static int release_cmd(JCR *jcr);
69 static int setdebug_cmd(JCR *jcr);
70 static int cancel_cmd(JCR *cjcr);
71 static int mount_cmd(JCR *jcr);
72 static int unmount_cmd(JCR *jcr);
73 static int autochanger_cmd(JCR *sjcr);
74 static int do_label(JCR *jcr, int relabel);
75 static bool find_device(JCR *jcr, char *dname);
76 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot);
77 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
78 char *newname, char *poolname,
79 int Slot, int relabel);
83 int (*func)(JCR *jcr);
87 * The following are the recognized commands from the Director.
89 static struct s_cmds cmds[] = {
90 {"JobId=", job_cmd}, /* start Job */
91 {"setdebug=", setdebug_cmd}, /* set debug level */
92 {"cancel", cancel_cmd},
93 {"label", label_cmd}, /* label a tape */
94 {"relabel", relabel_cmd}, /* relabel a tape */
96 {"unmount", unmount_cmd},
97 {"status", status_cmd},
98 {"autochanger", autochanger_cmd},
99 {"release", release_cmd},
100 {"readlabel", readlabel_cmd},
101 {NULL, NULL} /* list terminator */
106 * Connection request. We accept connections either from the
107 * Director or a Client (File daemon).
109 * Note, we are running as a seperate thread of the Storage daemon.
110 * and it is because a Director has made a connection with
111 * us on the "Message" channel.
113 * Basic tasks done here:
114 * - Create a JCR record
115 * - If it was from the FD, call handle_filed_connection()
116 * - Authenticate the Director
117 * - We wait for a command
118 * - We execute the command
119 * - We continue or exit depending on the return status
121 void *connection_request(void *arg)
123 BSOCK *bs = (BSOCK *)arg;
128 char name[MAX_NAME_LENGTH];
130 if (bnet_recv(bs) <= 0) {
131 Emsg0(M_ERROR, 0, _("Connection request failed.\n"));
136 * Do a sanity check on the message received
138 if (bs->msglen < 25 || bs->msglen > (int)sizeof(name)-25) {
139 Emsg1(M_ERROR, 0, _("Invalid Dir connection. Len=%d\n"), bs->msglen);
142 * See if this is a File daemon connection. If so
145 if (sscanf(bs->msg, "Hello Start Job %127s calling\n", name) == 1) {
146 handle_filed_connection(bs, name);
150 jcr = new_jcr(sizeof(JCR), stored_free_jcr); /* create Job Control Record */
151 jcr->dir_bsock = bs; /* save Director bsock */
152 jcr->dir_bsock->jcr = jcr;
154 Dmsg0(1000, "stored in start_job\n");
157 * Authenticate the Director
159 if (!authenticate_director(jcr)) {
160 Jmsg(jcr, M_FATAL, 0, _("Unable to authenticate Director\n"));
164 Dmsg0(90, "Message channel init completed.\n");
166 for (quit=0; !quit;) {
168 if ((bnet_stat = bnet_recv(bs)) <= 0) {
169 break; /* connection terminated */
171 Dmsg1(9, "<dird: %s\n", bs->msg);
173 for (i=0; cmds[i].cmd; i++) {
174 if (strncmp(cmds[i].cmd, bs->msg, strlen(cmds[i].cmd)) == 0) {
175 if (!cmds[i].func(jcr)) { /* do command */
176 quit = true; /* error, get out */
177 Dmsg1(90, "Command %s requsts quit\n", cmds[i].cmd);
179 found = true; /* indicate command found */
183 if (!found) { /* command not found */
184 bnet_fsend(bs, derrmsg);
189 bnet_sig(bs, BNET_TERMINATE);
195 * Set debug level as requested by the Director
198 static int setdebug_cmd(JCR *jcr)
200 BSOCK *dir = jcr->dir_bsock;
201 int level, trace_flag;
203 Dmsg1(10, "setdebug_cmd: %s", dir->msg);
204 if (sscanf(dir->msg, "setdebug=%d trace=%d", &level, &trace_flag) != 2 || level < 0) {
205 bnet_fsend(dir, "3991 Bad setdebug command: %s\n", dir->msg);
209 set_trace(trace_flag);
210 return bnet_fsend(dir, OKsetdebug, level);
217 static int cancel_cmd(JCR *cjcr)
219 BSOCK *dir = cjcr->dir_bsock;
221 char Job[MAX_NAME_LENGTH];
224 if (sscanf(dir->msg, "cancel Job=%127s", Job) == 1) {
225 if (!(jcr=get_jcr_by_full_name(Job))) {
226 bnet_fsend(dir, _("3992 Job %s not found.\n"), Job);
229 oldStatus = jcr->JobStatus;
230 set_jcr_job_status(jcr, JS_Canceled);
231 if (!jcr->authenticated && oldStatus == JS_WaitFD) {
232 pthread_cond_signal(&jcr->job_start_wait); /* wake waiting thread */
235 if (jcr->file_bsock) {
236 bnet_sig(jcr->file_bsock, BNET_TERMINATE);
238 /* If thread waiting on mount, wake him */
239 if (jcr->device && jcr->device->dev &&
240 (jcr->device->dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
241 jcr->device->dev->dev_blocked == BST_UNMOUNTED ||
242 jcr->device->dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
243 pthread_cond_signal(&jcr->device->dev->wait_next_vol);
245 bnet_fsend(dir, _("3000 Job %s marked to be canceled.\n"), jcr->Job);
249 bnet_fsend(dir, _("3993 Error scanning cancel command.\n"));
251 bnet_sig(dir, BNET_EOD);
259 static int label_cmd(JCR *jcr)
261 return do_label(jcr, 0);
264 static int relabel_cmd(JCR *jcr)
266 return do_label(jcr, 1);
269 static int do_label(JCR *jcr, int relabel)
271 POOLMEM *dname, *newname, *oldname, *poolname, *mtype;
272 BSOCK *dir = jcr->dir_bsock;
277 dname = get_memory(dir->msglen+1);
278 newname = get_memory(dir->msglen+1);
279 oldname = get_memory(dir->msglen+1);
280 poolname = get_memory(dir->msglen+1);
281 mtype = get_memory(dir->msglen+1);
283 if (sscanf(dir->msg, "relabel %s OldName=%s NewName=%s PoolName=%s MediaType=%s Slot=%d",
284 dname, oldname, newname, poolname, mtype, &slot) == 6) {
289 if (sscanf(dir->msg, "label %s VolumeName=%s PoolName=%s MediaType=%s Slot=%d",
290 dname, newname, poolname, mtype, &slot) == 5) {
295 unbash_spaces(newname);
296 unbash_spaces(oldname);
297 unbash_spaces(poolname);
298 unbash_spaces(mtype);
299 if (find_device(jcr, dname)) {
300 /******FIXME**** compare MediaTypes */
301 dev = jcr->device->dev;
303 P(dev->mutex); /* Use P to avoid indefinite block */
304 if (!(dev->state & ST_OPENED)) {
305 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
306 force_close_dev(dev);
307 /* Under certain "safe" conditions, we can steal the lock */
308 } else if (dev->dev_blocked &&
309 (dev->dev_blocked == BST_UNMOUNTED ||
310 dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
311 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
312 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
313 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
314 if (dev_state(dev, ST_READ)) {
315 bnet_fsend(dir, _("3911 Device %s is busy with 1 reader.\n"),
318 bnet_fsend(dir, _("3912 Device %s is busy with %d writer(s).\n"),
319 dev_name(dev), dev->num_writers);
321 } else { /* device not being used */
322 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
326 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
329 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
330 pm_strcpy(&jcr->errmsg, dir->msg);
331 bnet_fsend(dir, _("3903 Error scanning label command: %s\n"), jcr->errmsg);
334 free_memory(oldname);
335 free_memory(newname);
336 free_memory(poolname);
338 bnet_sig(dir, BNET_EOD);
343 * Read the tape label and determine if we can safely
344 * label the tape (not a Bacula volume), then label it.
346 * Enter with the mutex set
348 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
349 char *newname, char *poolname,
350 int slot, int relabel)
352 BSOCK *dir = jcr->dir_bsock;
356 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
358 pm_strcpy(&jcr->VolumeName, newname);
359 jcr->VolCatInfo.Slot = slot;
360 autoload_device(jcr, dev, 0, dir); /* autoload if possible */
361 block = new_block(dev);
363 /* Ensure that the device is open -- autoload_device() closes it */
364 for ( ; !(dev->state & ST_OPENED); ) {
365 if (open_dev(dev, jcr->VolumeName, READ_WRITE) < 0) {
366 bnet_fsend(dir, _("3910 Unable to open device %s. ERR=%s\n"),
367 dev_name(dev), strerror_dev(dev));
372 /* See what we have for a Volume */
373 switch (read_dev_volume_label(jcr, dev, block)) {
375 case VOL_VERSION_ERROR:
376 case VOL_LABEL_ERROR:
380 "3911 Cannot label Volume because it is already labeled: \"%s\"\n"),
381 dev->VolHdr.VolName);
384 /* Relabel request. If oldname matches, continue */
385 if (strcmp(oldname, dev->VolHdr.VolName) != 0) {
386 bnet_fsend(dir, _("Wrong volume mounted.\n"));
389 /* Fall through wanted! */
392 if (!write_volume_label_to_dev(jcr, jcr->device, newname, poolname)) {
393 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
396 pm_strcpy(&jcr->VolumeName, newname);
397 bnet_fsend(dir, _("3000 OK label. Volume=%s Device=%s\n"),
398 newname, dev_name(dev));
401 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
404 bnet_fsend(dir, _("3913 Cannot label Volume. \
405 Unknown status %d from read_volume_label()\n"), jcr->label_status);
410 give_back_device_lock(dev, &hold);
417 * Read the tape label
419 * Enter with the mutex set
421 static int read_label(JCR *jcr, DEVICE *dev)
424 BSOCK *dir = jcr->dir_bsock;
428 steal_device_lock(dev, &hold, BST_DOING_ACQUIRE);
430 jcr->VolumeName[0] = 0;
431 block = new_block(dev);
432 dev->state &= ~ST_LABEL; /* force read of label */
433 switch (read_dev_volume_label(jcr, dev, block)) {
435 bnet_fsend(dir, _("3001 Mounted Volume: %s\n"), dev->VolHdr.VolName);
439 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device \"%s\" because:\n%s"),
440 dev_name(dev), jcr->errmsg);
445 give_back_device_lock(dev, &hold);
449 static bool find_device(JCR *jcr, char *dname)
451 DEVRES *device = NULL;
454 unbash_spaces(dname);
456 while ((device=(DEVRES *)GetNextRes(R_DEVICE, (RES *)device))) {
457 /* Find resource, and make sure we were able to open it */
458 if (strcmp(device->hdr.name, dname) == 0 && device->dev) {
459 Dmsg1(20, "Found device %s\n", device->hdr.name);
460 jcr->device = device;
466 jcr->dcr = new_dcr(jcr, device->dev);
474 * Mount command from Director
476 static int mount_cmd(JCR *jcr)
479 BSOCK *dir = jcr->dir_bsock;
482 dname = get_memory(dir->msglen+1);
483 if (sscanf(dir->msg, "mount %s", dname) == 1) {
484 if (find_device(jcr, dname)) {
486 dev = jcr->device->dev;
487 P(dev->mutex); /* Use P to avoid indefinite block */
488 switch (dev->dev_blocked) { /* device blocked? */
489 case BST_WAITING_FOR_SYSOP:
490 /* Someone is waiting, wake him */
491 Dmsg0(100, "Waiting for mount. Attempting to wake thread\n");
492 dev->dev_blocked = BST_MOUNT;
493 bnet_fsend(dir, "3001 OK mount. Device=%s\n", dev_name(dev));
494 pthread_cond_signal(&dev->wait_next_vol);
497 /* In both of these two cases, we (the user) unmounted the Volume */
498 case BST_UNMOUNTED_WAITING_FOR_SYSOP:
500 /* We freed the device, so reopen it and wake any waiting threads */
501 if (open_dev(dev, NULL, READ_WRITE) < 0) {
502 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
506 block = new_block(dev);
507 read_dev_volume_label(jcr, dev, block);
509 if (dev->dev_blocked == BST_UNMOUNTED) {
510 /* We blocked the device, so unblock it */
511 Dmsg0(100, "Unmounted. Unblocking device\n");
512 read_label(jcr, dev); /* this should not be necessary */
515 Dmsg0(100, "Unmounted waiting for mount. Attempting to wake thread\n");
516 dev->dev_blocked = BST_MOUNT;
518 if (dev_state(dev, ST_LABEL)) {
519 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
520 dev_name(dev), dev->VolHdr.VolName);
522 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
523 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
526 pthread_cond_signal(&dev->wait_next_vol);
529 case BST_DOING_ACQUIRE:
530 bnet_fsend(dir, _("3001 Device %s is mounted; doing acquire.\n"),
534 case BST_WRITING_LABEL:
535 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"), dev_name(dev));
538 case BST_NOT_BLOCKED:
539 if (dev_state(dev, ST_OPENED)) {
540 if (dev_state(dev, ST_LABEL)) {
541 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
542 dev_name(dev), dev->VolHdr.VolName);
544 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
545 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
549 if (!dev_is_tape(dev)) {
550 bnet_fsend(dir, _("3906 cannot mount non-tape.\n"));
553 if (open_dev(dev, NULL, READ_WRITE) < 0) {
554 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
558 read_label(jcr, dev);
559 if (dev_state(dev, ST_LABEL)) {
560 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
561 dev_name(dev), dev->VolHdr.VolName);
563 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
564 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
571 bnet_fsend(dir, _("3905 Bizarre wait state %d\n"), dev->dev_blocked);
576 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
579 pm_strcpy(&jcr->errmsg, dir->msg);
580 bnet_fsend(dir, _("3909 Error scanning mount command: %s\n"), jcr->errmsg);
583 bnet_sig(dir, BNET_EOD);
588 * unmount command from Director
590 static int unmount_cmd(JCR *jcr)
593 BSOCK *dir = jcr->dir_bsock;
596 dname = get_memory(dir->msglen+1);
597 if (sscanf(dir->msg, "unmount %s", dname) == 1) {
598 if (find_device(jcr, dname)) {
599 dev = jcr->device->dev;
600 P(dev->mutex); /* Use P to avoid indefinite block */
601 if (!(dev->state & ST_OPENED)) {
602 Dmsg0(90, "Device already unmounted\n");
603 bnet_fsend(dir, _("3901 Device \"%s\" is already unmounted.\n"), dev_name(dev));
605 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP) {
606 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
608 open_dev(dev, NULL, 0); /* fake open for close */
609 offline_or_rewind_dev(dev);
610 force_close_dev(dev);
611 dev->dev_blocked = BST_UNMOUNTED_WAITING_FOR_SYSOP;
612 bnet_fsend(dir, _("3001 Device \"%s\" unmounted.\n"), dev_name(dev));
614 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
615 bnet_fsend(dir, _("3902 Device \"%s\" is busy in acquire.\n"), dev_name(dev));
617 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
618 bnet_fsend(dir, _("3903 Device \"%s\" is being labeled.\n"), dev_name(dev));
620 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
621 if (dev_state(dev, ST_READ)) {
622 Dmsg0(90, "Device in read mode\n");
623 bnet_fsend(dir, _("3904 Device \"%s\" is busy reading.\n"), dev_name(dev));
625 Dmsg1(90, "Device busy with %d writers\n", dev->num_writers);
626 bnet_fsend(dir, _("3905 Device %s is busy with %d writer(s).\n"),
627 dev_name(dev), dev->num_writers);
630 } else { /* device not being used */
631 Dmsg0(90, "Device not in use, unmounting\n");
632 /* On FreeBSD, I am having ASSERT() failures in block_device()
633 * and I can only imagine that the thread id that we are
634 * leaving in no_wait_id is being re-used. So here,
635 * we simply do it by hand. Gross, but a solution.
637 /* block_device(dev, BST_UNMOUNTED); replace with 2 lines below */
638 dev->dev_blocked = BST_UNMOUNTED;
640 open_dev(dev, NULL, 0); /* fake open for close */
641 offline_or_rewind_dev(dev);
642 force_close_dev(dev);
643 bnet_fsend(dir, _("3002 Device %s unmounted.\n"), dev_name(dev));
647 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
650 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
651 pm_strcpy(&jcr->errmsg, dir->msg);
652 bnet_fsend(dir, _("3907 Error scanning unmount command: %s\n"), jcr->errmsg);
655 bnet_sig(dir, BNET_EOD);
660 * Release command from Director. This rewinds the device and if
661 * configured does a offline and ensures that Bacula will
662 * re-read the label of the tape before continuing. This gives
663 * the operator the chance to change the tape anytime before the
666 static int release_cmd(JCR *jcr)
669 BSOCK *dir = jcr->dir_bsock;
672 dname = get_memory(dir->msglen+1);
673 if (sscanf(dir->msg, "release %s", dname) == 1) {
674 if (find_device(jcr, dname)) {
675 dev = jcr->device->dev;
676 P(dev->mutex); /* Use P to avoid indefinite block */
677 if (!(dev->state & ST_OPENED)) {
678 Dmsg0(90, "Device already released\n");
679 bnet_fsend(dir, _("3911 Device %s already released.\n"), dev_name(dev));
681 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
682 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP) {
683 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
685 bnet_fsend(dir, _("3912 Device %s waiting for mount.\n"), dev_name(dev));
687 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
688 bnet_fsend(dir, _("3913 Device %s is busy in acquire.\n"), dev_name(dev));
690 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
691 bnet_fsend(dir, _("3914 Device %s is being labeled.\n"), dev_name(dev));
693 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
694 if (dev_state(dev, ST_READ)) {
695 Dmsg0(90, "Device in read mode\n");
696 bnet_fsend(dir, _("3915 Device %s is busy with 1 reader.\n"), dev_name(dev));
698 Dmsg1(90, "Device busy with %d writers\n", dev->num_writers);
699 bnet_fsend(dir, _("3916 Device %s is busy with %d writer(s).\n"),
700 dev_name(dev), dev->num_writers);
703 } else { /* device not being used */
704 Dmsg0(90, "Device not in use, unmounting\n");
705 release_volume(jcr, dev);
706 bnet_fsend(dir, _("3012 Device %s released.\n"), dev_name(dev));
710 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
713 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
714 pm_strcpy(&jcr->errmsg, dir->msg);
715 bnet_fsend(dir, _("3917 Error scanning release command: %s\n"), jcr->errmsg);
718 bnet_sig(dir, BNET_EOD);
725 * Autochanger command from Director
727 static int autochanger_cmd(JCR *jcr)
730 BSOCK *dir = jcr->dir_bsock;
733 dname = get_memory(dir->msglen+1);
734 if (sscanf(dir->msg, "autochanger list %s ", dname) == 1) {
735 if (find_device(jcr, dname)) {
736 dev = jcr->device->dev;
737 P(dev->mutex); /* Use P to avoid indefinite block */
738 if (!dev_is_tape(dev)) {
739 bnet_fsend(dir, _("3995 Device %s is not an autochanger.\n"), dev_name(dev));
740 } else if (!(dev->state & ST_OPENED)) {
741 autochanger_list(jcr, dev, dir);
742 /* Under certain "safe" conditions, we can steal the lock */
743 } else if (dev->dev_blocked &&
744 (dev->dev_blocked == BST_UNMOUNTED ||
745 dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
746 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
747 autochanger_list(jcr, dev, dir);
748 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
749 if (dev_state(dev, ST_READ)) {
750 bnet_fsend(dir, _("3901 Device %s is busy with 1 reader.\n"), dev_name(dev));
752 bnet_fsend(dir, _("3902 Device %s is busy with %d writer(s).\n"),
753 dev_name(dev), dev->num_writers);
755 } else { /* device not being used */
756 autochanger_list(jcr, dev, dir);
760 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
762 } else { /* error on scanf */
763 pm_strcpy(&jcr->errmsg, dir->msg);
764 bnet_fsend(dir, _("3908 Error scanning autocharger list command: %s\n"),
768 bnet_sig(dir, BNET_EOD);
773 * Read and return the Volume label
775 static int readlabel_cmd(JCR *jcr)
778 BSOCK *dir = jcr->dir_bsock;
782 dname = get_memory(dir->msglen+1);
783 if (sscanf(dir->msg, "readlabel %s Slot=%d", dname, &Slot) == 2) {
784 if (find_device(jcr, dname)) {
785 dev = jcr->device->dev;
787 P(dev->mutex); /* Use P to avoid indefinite block */
788 if (!dev_state(dev, ST_OPENED)) {
789 read_volume_label(jcr, dev, Slot);
790 force_close_dev(dev);
791 /* Under certain "safe" conditions, we can steal the lock */
792 } else if (dev->dev_blocked &&
793 (dev->dev_blocked == BST_UNMOUNTED ||
794 dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
795 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
796 read_volume_label(jcr, dev, Slot);
797 } else if (dev_state(dev, ST_READ) || dev->num_writers) {
798 if (dev_state(dev, ST_READ)) {
799 bnet_fsend(dir, _("3911 Device %s is busy with 1 reader.\n"),
802 bnet_fsend(dir, _("3912 Device %s is busy with %d writer(s).\n"),
803 dev_name(dev), dev->num_writers);
805 } else { /* device not being used */
806 read_volume_label(jcr, dev, Slot);
810 bnet_fsend(dir, _("3999 Device %s not found\n"), dname);
813 pm_strcpy(&jcr->errmsg, dir->msg);
814 bnet_fsend(dir, _("3909 Error scanning readlabel command: %s\n"), jcr->errmsg);
817 bnet_sig(dir, BNET_EOD);
822 * Read the tape label
824 * Enter with the mutex set
826 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot)
828 BSOCK *dir = jcr->dir_bsock;
832 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
834 jcr->VolumeName[0] = 0;
835 jcr->VolCatInfo.Slot = Slot;
836 autoload_device(jcr, dev, 0, dir); /* autoload if possible */
837 block = new_block(dev);
839 /* Ensure that the device is open -- autoload_device() closes it */
840 for ( ; !dev_state(dev, ST_OPENED); ) {
841 if (open_dev(dev, jcr->VolumeName, READ_WRITE) < 0) {
842 bnet_fsend(dir, _("3910 Unable to open device \"%s\". ERR=%s\n"),
843 dev_name(dev), strerror_dev(dev));
848 dev->state &= ~ST_LABEL; /* force read of label */
849 switch (read_dev_volume_label(jcr, dev, block)) {
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);
862 give_back_device_lock(dev, &hold);