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) 2001-2005 Kern Sibbald
24 This program is free software; you can redistribute it and/or
25 modify it under the terms of the GNU General Public License
26 version 2 as ammended with additional clauses defined in the
27 file LICENSE in the main source directory.
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
32 the file LICENSE for additional details.
39 /* Exported variables */
41 /* Imported variables */
42 extern BSOCK *filed_chan;
43 extern int r_first, r_last;
44 extern struct s_res resources[];
45 extern char my_name[];
46 extern time_t daemon_start_time;
47 extern struct s_last_job last_job;
49 /* Static variables */
50 static char derrmsg[] = "3900 Invalid command\n";
51 static char OKsetdebug[] = "3000 OK setdebug=%d\n";
52 static char illegal_cmd[] = "3997 Illegal command for a Director with Monitor directive enabled\n";
54 /* Imported functions */
55 extern void terminate_child();
56 extern bool job_cmd(JCR *jcr);
57 extern bool use_cmd(JCR *jcr);
58 extern bool run_cmd(JCR *jcr);
59 extern bool status_cmd(JCR *sjcr);
60 extern bool qstatus_cmd(JCR *jcr);
61 //extern bool query_cmd(JCR *jcr);
63 /* Forward referenced functions */
64 static bool label_cmd(JCR *jcr);
65 static bool relabel_cmd(JCR *jcr);
66 static bool readlabel_cmd(JCR *jcr);
67 static bool release_cmd(JCR *jcr);
68 static bool setdebug_cmd(JCR *jcr);
69 static bool cancel_cmd(JCR *cjcr);
70 static bool mount_cmd(JCR *jcr);
71 static bool unmount_cmd(JCR *jcr);
72 static bool autochanger_cmd(JCR *sjcr);
73 static bool do_label(JCR *jcr, int relabel);
74 static DEVICE *find_device(JCR *jcr, POOL_MEM &dev_name);
75 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot);
76 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
77 char *newname, char *poolname,
78 int Slot, int relabel);
79 static bool try_autoload_device(JCR *jcr, int slot, const char *VolName);
80 static void send_dir_busy_message(BSOCK *dir, DEVICE *dev);
84 bool (*func)(JCR *jcr);
85 int monitoraccess; /* specify if monitors have access to this function */
89 * The following are the recognized commands from the Director.
91 static struct s_cmds cmds[] = {
92 {"JobId=", job_cmd, 0}, /* start Job */
93 {"autochanger", autochanger_cmd, 0},
94 {"bootstrap", bootstrap_cmd, 0},
95 {"cancel", cancel_cmd, 0},
96 {"label", label_cmd, 0}, /* label a tape */
97 {"mount", mount_cmd, 0},
98 {"readlabel", readlabel_cmd, 0},
99 {"release", release_cmd, 0},
100 {"relabel", relabel_cmd, 0}, /* relabel a tape */
101 {"setdebug=", setdebug_cmd, 0}, /* set debug level */
102 {"status", status_cmd, 1},
103 {".status", qstatus_cmd, 1},
104 {"unmount", unmount_cmd, 0},
105 {"use storage=", use_cmd, 0},
107 // {"query", query_cmd, 0},
108 {NULL, NULL} /* list terminator */
113 * Connection request. We accept connections either from the
114 * Director or a Client (File daemon).
116 * Note, we are running as a seperate thread of the Storage daemon.
117 * and it is because a Director has made a connection with
118 * us on the "Message" channel.
120 * Basic tasks done here:
121 * - Create a JCR record
122 * - If it was from the FD, call handle_filed_connection()
123 * - Authenticate the Director
124 * - We wait for a command
125 * - We execute the command
126 * - We continue or exit depending on the return status
128 void *handle_connection_request(void *arg)
130 BSOCK *bs = (BSOCK *)arg;
135 char name[MAX_NAME_LENGTH];
137 if (bnet_recv(bs) <= 0) {
138 Emsg0(M_ERROR, 0, _("Connection request failed.\n"));
144 * Do a sanity check on the message received
146 if (bs->msglen < 25 || bs->msglen > (int)sizeof(name)-25) {
147 Emsg1(M_ERROR, 0, _("Invalid connection. Len=%d\n"), bs->msglen);
152 * See if this is a File daemon connection. If so
155 Dmsg1(110, "Conn: %s", bs->msg);
156 if (sscanf(bs->msg, "Hello Start Job %127s", name) == 1) {
157 handle_filed_connection(bs, name);
162 * This is a connection from the Director, so setup a JCR
164 Dmsg0(110, "Start Dir Job\n");
165 jcr = new_jcr(sizeof(JCR), stored_free_jcr); /* create Job Control Record */
166 jcr->dir_bsock = bs; /* save Director bsock */
167 jcr->dir_bsock->jcr = jcr;
168 jcr->dcrs = New(alist(10, not_owned_by_alist));
169 /* Initialize FD start condition variable */
170 int errstat = pthread_cond_init(&jcr->job_start_wait, NULL);
172 Jmsg1(jcr, M_FATAL, 0, _("Unable to init job cond variable: ERR=%s\n"), strerror(errstat));
176 Dmsg0(1000, "stored in start_job\n");
179 * Authenticate the Director
181 if (!authenticate_director(jcr)) {
182 Jmsg(jcr, M_FATAL, 0, _("Unable to authenticate Director\n"));
185 Dmsg0(90, "Message channel init completed.\n");
187 for (quit=false; !quit;) {
189 if ((bnet_stat = bnet_recv(bs)) <= 0) {
190 break; /* connection terminated */
192 Dmsg1(199, "<dird: %s\n", bs->msg);
194 for (i=0; cmds[i].cmd; i++) {
195 if (strncmp(cmds[i].cmd, bs->msg, strlen(cmds[i].cmd)) == 0) {
196 if ((!cmds[i].monitoraccess) && (jcr->director->monitor)) {
197 Dmsg1(100, "Command %s illegal.\n", cmds[i].cmd);
198 bnet_fsend(bs, illegal_cmd);
199 bnet_sig(bs, BNET_EOD);
202 Dmsg1(200, "Do command: %s\n", cmds[i].cmd);
203 if (!cmds[i].func(jcr)) { /* do command */
204 quit = true; /* error, get out */
205 Dmsg1(190, "Command %s requsts quit\n", cmds[i].cmd);
207 found = true; /* indicate command found */
211 if (!found) { /* command not found */
212 bnet_fsend(bs, derrmsg);
217 generate_daemon_event(jcr, "JobEnd");
218 dequeue_messages(jcr); /* send any queued messages */
219 bnet_sig(bs, BNET_TERMINATE);
225 * Set debug level as requested by the Director
228 static bool setdebug_cmd(JCR *jcr)
230 BSOCK *dir = jcr->dir_bsock;
231 int level, trace_flag;
233 Dmsg1(10, "setdebug_cmd: %s", dir->msg);
234 if (sscanf(dir->msg, "setdebug=%d trace=%d", &level, &trace_flag) != 2 || level < 0) {
235 bnet_fsend(dir, "3991 Bad setdebug command: %s\n", dir->msg);
239 set_trace(trace_flag);
240 return bnet_fsend(dir, OKsetdebug, level);
247 static bool cancel_cmd(JCR *cjcr)
249 BSOCK *dir = cjcr->dir_bsock;
251 char Job[MAX_NAME_LENGTH];
254 if (sscanf(dir->msg, "cancel Job=%127s", Job) == 1) {
255 if (!(jcr=get_jcr_by_full_name(Job))) {
256 bnet_fsend(dir, _("3902 Job %s not found.\n"), Job);
259 oldStatus = jcr->JobStatus;
260 set_jcr_job_status(jcr, JS_Canceled);
261 if (!jcr->authenticated && oldStatus == JS_WaitFD) {
262 pthread_cond_signal(&jcr->job_start_wait); /* wake waiting thread */
265 if (jcr->file_bsock) {
266 bnet_sig(jcr->file_bsock, BNET_TERMINATE);
268 /* If thread waiting on mount, wake him */
269 if (jcr->dcr && jcr->dcr->dev && jcr->dcr->dev->waiting_for_mount()) {
270 pthread_cond_signal(&jcr->dcr->dev->wait_next_vol);
271 pthread_cond_broadcast(&wait_device_release);
273 bnet_fsend(dir, _("3000 Job %s marked to be canceled.\n"), jcr->Job);
277 bnet_fsend(dir, _("3903 Error scanning cancel command.\n"));
279 bnet_sig(dir, BNET_EOD);
287 static bool label_cmd(JCR *jcr)
289 return do_label(jcr, 0);
292 static bool relabel_cmd(JCR *jcr)
294 return do_label(jcr, 1);
297 static bool do_label(JCR *jcr, int relabel)
299 POOLMEM *newname, *oldname, *poolname, *mtype;
301 BSOCK *dir = jcr->dir_bsock;
306 newname = get_memory(dir->msglen+1);
307 oldname = get_memory(dir->msglen+1);
308 poolname = get_memory(dir->msglen+1);
309 mtype = get_memory(dir->msglen+1);
311 if (sscanf(dir->msg, "relabel %127s OldName=%127s NewName=%127s PoolName=%127s MediaType=%127s Slot=%d",
312 dev_name.c_str(), oldname, newname, poolname, mtype, &slot) == 6) {
317 if (sscanf(dir->msg, "label %127s VolumeName=%127s PoolName=%127s MediaType=%127s Slot=%d",
318 dev_name.c_str(), newname, poolname, mtype, &slot) == 5) {
323 unbash_spaces(newname);
324 unbash_spaces(oldname);
325 unbash_spaces(poolname);
326 unbash_spaces(mtype);
327 dev = find_device(jcr, dev_name);
329 /******FIXME**** compare MediaTypes */
330 P(dev->mutex); /* Use P to avoid indefinite block */
331 if (!dev->is_open()) {
332 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
333 force_close_device(dev);
334 /* Under certain "safe" conditions, we can steal the lock */
335 } else if (dev->can_steal_lock()) {
336 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
337 } else if (dev->is_busy()) {
338 send_dir_busy_message(dir, dev);
339 } else { /* device not being used */
340 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
344 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), dev_name.c_str());
347 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
348 pm_strcpy(jcr->errmsg, dir->msg);
349 bnet_fsend(dir, _("3903 Error scanning label command: %s\n"), jcr->errmsg);
351 free_memory(oldname);
352 free_memory(newname);
353 free_memory(poolname);
355 bnet_sig(dir, BNET_EOD);
360 * Read the tape label and determine if we can safely
361 * label the tape (not a Bacula volume), then label it.
363 * Enter with the mutex set
365 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
366 char *newname, char *poolname,
367 int slot, int relabel)
369 BSOCK *dir = jcr->dir_bsock;
375 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
377 if (!try_autoload_device(jcr, slot, newname)) {
378 goto bail_out; /* error */
381 /* See what we have for a Volume */
383 label_status = read_dev_volume_label_guess(dcr, 1);
385 label_status = read_dev_volume_label(dcr);
388 switch(label_status) {
390 case VOL_VERSION_ERROR:
391 case VOL_LABEL_ERROR:
395 "3920 Cannot label Volume because it is already labeled: \"%s\"\n"),
396 dev->VolHdr.VolName);
399 /* Relabel request. If oldname matches, continue */
400 if (strcmp(oldname, dev->VolHdr.VolName) != 0) {
401 bnet_fsend(dir, _("3921 Wrong volume mounted.\n"));
404 if (dev->label_type != B_BACULA_LABEL) {
405 bnet_fsend(dir, _("3922 Cannot relabel an ANSI/IBM labeled Volume.\n"));
408 /* Fall through wanted! */
411 if (!write_new_volume_label_to_dev(dcr, newname, poolname)) {
412 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
415 bstrncpy(dcr->VolumeName, newname, sizeof(dcr->VolumeName));
416 /* The following 3000 OK label. string is scanned in ua_label.c */
417 bnet_fsend(dir, "3000 OK label. Volume=%s Device=%s\n",
418 newname, dev->print_name());
421 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
424 bnet_fsend(dir, _("3913 Cannot label Volume. "
425 "Unknown status %d from read_volume_label()\n"), label_status);
430 give_back_device_lock(dev, &hold);
436 * Read the tape label
438 * Enter with the mutex set
440 static bool read_label(DCR *dcr)
444 BSOCK *dir = jcr->dir_bsock;
446 DEVICE *dev = dcr->dev;
448 steal_device_lock(dev, &hold, BST_DOING_ACQUIRE);
450 dcr->VolumeName[0] = 0;
451 dev->clear_labeled(); /* force read of label */
452 switch (read_dev_volume_label(dcr)) {
454 bnet_fsend(dir, _("3001 Mounted Volume: %s\n"), dev->VolHdr.VolName);
458 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device %s because:\n%s"),
459 dev->print_name(), jcr->errmsg);
463 give_back_device_lock(dev, &hold);
467 static DEVICE *find_device(JCR *jcr, POOL_MEM &devname)
470 AUTOCHANGER *changer;
473 unbash_spaces(devname);
475 foreach_res(device, R_DEVICE) {
476 /* Find resource, and make sure we were able to open it */
477 if (fnmatch(device->hdr.name, devname.c_str(), 0) == 0) {
479 device->dev = init_dev(jcr, NULL, device);
482 Jmsg(jcr, M_WARNING, 0, _("\n"
483 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
487 Dmsg1(20, "Found device %s\n", device->hdr.name);
492 foreach_res(changer, R_AUTOCHANGER) {
493 /* Find resource, and make sure we were able to open it */
494 if (fnmatch(devname.c_str(), changer->hdr.name, 0) == 0) {
495 /* Try each device in this AutoChanger */
496 foreach_alist(device, changer->device) {
497 Dmsg1(100, "Try changer device %s\n", device->hdr.name);
499 device->dev = init_dev(jcr, NULL, device);
502 Dmsg1(100, "Device %s could not be opened. Skipped\n", devname.c_str());
503 Jmsg(jcr, M_WARNING, 0, _("\n"
504 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
505 device->hdr.name, devname.c_str());
508 if (!device->dev->autoselect) {
509 continue; /* device is not available */
511 Dmsg1(20, "Found changer device %s\n", device->hdr.name);
515 break; /* we found it but could not open a device */
520 jcr->dcr = new_dcr(jcr, device->dev);
522 jcr->dcr->device = device;
523 return jcr->dcr->dev;
531 * Mount command from Director
533 static bool mount_cmd(JCR *jcr)
536 BSOCK *dir = jcr->dir_bsock;
540 if (sscanf(dir->msg, "mount %127s", devname.c_str()) == 1) {
541 dev = find_device(jcr, devname);
544 P(dev->mutex); /* Use P to avoid indefinite block */
545 switch (dev->dev_blocked) { /* device blocked? */
546 case BST_WAITING_FOR_SYSOP:
547 /* Someone is waiting, wake him */
548 Dmsg0(100, "Waiting for mount. Attempting to wake thread\n");
549 dev->dev_blocked = BST_MOUNT;
550 bnet_fsend(dir, "3001 OK mount. Device=%s\n",
552 pthread_cond_broadcast(&dev->wait_next_vol);
553 pthread_cond_broadcast(&wait_device_release);
556 /* In both of these two cases, we (the user) unmounted the Volume */
557 case BST_UNMOUNTED_WAITING_FOR_SYSOP:
559 /* We freed the device, so reopen it and wake any waiting threads */
560 if (open_dev(dev, NULL, OPEN_READ_WRITE) < 0) {
561 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
565 read_dev_volume_label(dcr);
566 if (dev->dev_blocked == BST_UNMOUNTED) {
567 /* We blocked the device, so unblock it */
568 Dmsg0(100, "Unmounted. Unblocking device\n");
569 read_label(dcr); /* this should not be necessary */
572 Dmsg0(100, "Unmounted waiting for mount. Attempting to wake thread\n");
573 dev->dev_blocked = BST_MOUNT;
575 if (dev->is_labeled()) {
576 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
577 dev->print_name(), 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"),
583 pthread_cond_broadcast(&dev->wait_next_vol);
584 pthread_cond_broadcast(&wait_device_release);
587 case BST_DOING_ACQUIRE:
588 bnet_fsend(dir, _("3001 Device %s is mounted; doing acquire.\n"),
592 case BST_WRITING_LABEL:
593 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"),
597 case BST_NOT_BLOCKED:
598 if (dev->is_open()) {
599 if (dev->is_labeled()) {
600 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
601 dev->print_name(), dev->VolHdr.VolName);
603 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
604 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
608 if (!dev->is_tape()) {
612 if (open_dev(dev, NULL, OPEN_READ_WRITE) < 0) {
613 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
618 if (dev->is_labeled()) {
619 bnet_fsend(dir, _("3001 Device %s is already mounted with Volume \"%s\"\n"),
620 dev->print_name(), dev->VolHdr.VolName);
622 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
623 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
630 bnet_fsend(dir, _("3905 Bizarre wait state %d\n"), dev->dev_blocked);
635 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
638 pm_strcpy(jcr->errmsg, dir->msg);
639 bnet_fsend(dir, _("3909 Error scanning mount command: %s\n"), jcr->errmsg);
641 bnet_sig(dir, BNET_EOD);
646 * unmount command from Director
648 static bool unmount_cmd(JCR *jcr)
651 BSOCK *dir = jcr->dir_bsock;
654 if (sscanf(dir->msg, "unmount %127s", devname.c_str()) == 1) {
655 dev = find_device(jcr, devname);
657 P(dev->mutex); /* Use P to avoid indefinite block */
658 if (!dev->is_open()) {
659 Dmsg0(90, "Device already unmounted\n");
660 bnet_fsend(dir, _("3901 Device %s is already unmounted.\n"),
663 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP) {
664 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
666 offline_or_rewind_dev(dev);
667 force_close_device(dev);
668 dev->dev_blocked = BST_UNMOUNTED_WAITING_FOR_SYSOP;
669 bnet_fsend(dir, _("3001 Device %s unmounted.\n"),
672 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
673 bnet_fsend(dir, _("3902 Device %s is busy in acquire.\n"),
676 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
677 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"),
680 } else if (dev->is_busy()) {
681 send_dir_busy_message(dir, dev);
682 } else { /* device not being used */
683 Dmsg0(90, "Device not in use, unmounting\n");
684 /* On FreeBSD, I am having ASSERT() failures in block_device()
685 * and I can only imagine that the thread id that we are
686 * leaving in no_wait_id is being re-used. So here,
687 * we simply do it by hand. Gross, but a solution.
689 /* block_device(dev, BST_UNMOUNTED); replace with 2 lines below */
690 dev->dev_blocked = BST_UNMOUNTED;
692 offline_or_rewind_dev(dev);
693 force_close_device(dev);
694 bnet_fsend(dir, _("3002 Device %s unmounted.\n"),
699 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
702 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
703 pm_strcpy(jcr->errmsg, dir->msg);
704 bnet_fsend(dir, _("3907 Error scanning unmount command: %s\n"), jcr->errmsg);
706 bnet_sig(dir, BNET_EOD);
711 * Release command from Director. This rewinds the device and if
712 * configured does a offline and ensures that Bacula will
713 * re-read the label of the tape before continuing. This gives
714 * the operator the chance to change the tape anytime before the
717 static bool release_cmd(JCR *jcr)
720 BSOCK *dir = jcr->dir_bsock;
723 if (sscanf(dir->msg, "release %127s", devname.c_str()) == 1) {
724 dev = find_device(jcr, devname);
726 P(dev->mutex); /* Use P to avoid indefinite block */
727 if (!dev->is_open()) {
728 Dmsg0(90, "Device already released\n");
729 bnet_fsend(dir, _("3911 Device %s already released.\n"),
732 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
733 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP) {
734 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
736 bnet_fsend(dir, _("3912 Device %s waiting for mount.\n"),
739 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
740 bnet_fsend(dir, _("3913 Device %s is busy in acquire.\n"),
743 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
744 bnet_fsend(dir, _("3914 Device %s is being labeled.\n"),
747 } else if (dev->is_busy()) {
748 send_dir_busy_message(dir, dev);
749 } else { /* device not being used */
750 Dmsg0(90, "Device not in use, unmounting\n");
751 release_volume(jcr->dcr);
752 bnet_fsend(dir, _("3012 Device %s released.\n"),
757 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
760 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
761 pm_strcpy(jcr->errmsg, dir->msg);
762 bnet_fsend(dir, _("3917 Error scanning release command: %s\n"), jcr->errmsg);
764 bnet_sig(dir, BNET_EOD);
771 * Autochanger command from Director
773 static bool autochanger_cmd(JCR *jcr)
776 BSOCK *dir = jcr->dir_bsock;
779 const char *cmd = NULL;
782 if (sscanf(dir->msg, "autochanger list %127s ", devname.c_str()) == 1) {
785 } else if (sscanf(dir->msg, "autochanger slots %127s ", devname.c_str()) == 1) {
790 dev = find_device(jcr, devname);
793 P(dev->mutex); /* Use P to avoid indefinite block */
794 if (!dev->is_tape()) {
795 bnet_fsend(dir, _("3995 Device %s is not an autochanger.\n"),
797 } else if (!dev->is_open()) {
798 autochanger_cmd(dcr, dir, cmd);
799 /* Under certain "safe" conditions, we can steal the lock */
800 } else if (dev->can_steal_lock()) {
801 autochanger_cmd(dcr, dir, cmd);
802 } else if (dev->is_busy()) {
803 send_dir_busy_message(dir, dev);
804 } else { /* device not being used */
805 autochanger_cmd(dcr, dir, cmd);
809 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
811 } else { /* error on scanf */
812 pm_strcpy(jcr->errmsg, dir->msg);
813 bnet_fsend(dir, _("3908 Error scanning autocharger list/slots command: %s\n"),
816 bnet_sig(dir, BNET_EOD);
821 * Read and return the Volume label
823 static bool readlabel_cmd(JCR *jcr)
826 BSOCK *dir = jcr->dir_bsock;
830 if (sscanf(dir->msg, "readlabel %127s Slot=%d", devname.c_str(), &Slot) == 2) {
831 dev = find_device(jcr, devname);
833 P(dev->mutex); /* Use P to avoid indefinite block */
834 if (!dev->is_open()) {
835 read_volume_label(jcr, dev, Slot);
836 force_close_device(dev);
837 /* Under certain "safe" conditions, we can steal the lock */
838 } else if (dev->can_steal_lock()) {
839 read_volume_label(jcr, dev, Slot);
840 } else if (dev->is_busy()) {
841 send_dir_busy_message(dir, dev);
842 } else { /* device not being used */
843 read_volume_label(jcr, dev, Slot);
847 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
850 pm_strcpy(jcr->errmsg, dir->msg);
851 bnet_fsend(dir, _("3909 Error scanning readlabel command: %s\n"), jcr->errmsg);
853 bnet_sig(dir, BNET_EOD);
858 * Read the tape label
860 * Enter with the mutex set
862 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot)
864 BSOCK *dir = jcr->dir_bsock;
869 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
871 if (!try_autoload_device(jcr, Slot, "")) {
872 goto bail_out; /* error */
875 dev->clear_labeled(); /* force read of label */
876 switch (read_dev_volume_label(dcr)) {
878 /* DO NOT add quotes around the Volume name. It is scanned in the DIR */
879 bnet_fsend(dir, _("3001 Volume=%s Slot=%d\n"), dev->VolHdr.VolName, Slot);
880 Dmsg1(100, "Volume: %s\n", dev->VolHdr.VolName);
883 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device %s because:\n%s"),
884 dev->print_name(), jcr->errmsg);
889 give_back_device_lock(dev, &hold);
893 static bool try_autoload_device(JCR *jcr, int slot, const char *VolName)
896 BSOCK *dir = jcr->dir_bsock;
897 DEVICE *dev = dcr->dev;
899 bstrncpy(dcr->VolumeName, VolName, sizeof(dcr->VolumeName));
900 dcr->VolCatInfo.Slot = slot;
901 dcr->VolCatInfo.InChanger = slot > 0;
902 if (autoload_device(dcr, 0, dir) < 0) { /* autoload if possible */
906 /* Ensure that the device is open -- autoload_device() closes it */
907 for ( ; !dev->is_open(); ) {
908 if (open_dev(dev, dcr->VolumeName, OPEN_READ_WRITE) < 0) {
909 bnet_fsend(dir, _("3910 Unable to open device %s: ERR=%s\n"),
910 dev->print_name(), dev->strerror());
917 static void send_dir_busy_message(BSOCK *dir, DEVICE *dev)
919 if (dev->can_read()) {
920 bnet_fsend(dir, _("3911 Device %s is busy reading.\n"),
923 bnet_fsend(dir, _("3912 Device %s is busy with %d writer(s).\n"),
924 dev->print_name(), dev->num_writers);