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 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 use_cmd(JCR *jcr);
63 extern bool run_cmd(JCR *jcr);
64 extern bool status_cmd(JCR *sjcr);
65 extern bool qstatus_cmd(JCR *jcr);
66 //extern bool query_cmd(JCR *jcr);
68 /* Forward referenced functions */
69 static bool label_cmd(JCR *jcr);
70 static bool relabel_cmd(JCR *jcr);
71 static bool readlabel_cmd(JCR *jcr);
72 static bool release_cmd(JCR *jcr);
73 static bool setdebug_cmd(JCR *jcr);
74 static bool cancel_cmd(JCR *cjcr);
75 static bool mount_cmd(JCR *jcr);
76 static bool unmount_cmd(JCR *jcr);
77 static bool autochanger_cmd(JCR *sjcr);
78 static bool do_label(JCR *jcr, int relabel);
79 static DEVICE *find_device(JCR *jcr, POOL_MEM &dev_name);
80 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot);
81 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
82 char *newname, char *poolname,
83 int Slot, int relabel);
84 static bool try_autoload_device(JCR *jcr, int slot, const char *VolName);
85 static void send_dir_busy_message(BSOCK *dir, DEVICE *dev);
89 bool (*func)(JCR *jcr);
90 int monitoraccess; /* specify if monitors have access to this function */
94 * The following are the recognized commands from the Director.
96 static struct s_cmds cmds[] = {
97 {"JobId=", job_cmd, 0}, /* start Job */
98 {"autochanger", autochanger_cmd, 0},
99 {"bootstrap", bootstrap_cmd, 0},
100 {"cancel", cancel_cmd, 0},
101 {"label", label_cmd, 0}, /* label a tape */
102 {"mount", mount_cmd, 0},
103 {"readlabel", readlabel_cmd, 0},
104 {"release", release_cmd, 0},
105 {"relabel", relabel_cmd, 0}, /* relabel a tape */
106 {"setdebug=", setdebug_cmd, 0}, /* set debug level */
107 {"status", status_cmd, 1},
108 {".status", qstatus_cmd, 1},
109 {"unmount", unmount_cmd, 0},
110 {"use storage=", use_cmd, 0},
112 // {"query", query_cmd, 0},
113 {NULL, NULL} /* list terminator */
118 * Connection request. We accept connections either from the
119 * Director or a Client (File daemon).
121 * Note, we are running as a seperate thread of the Storage daemon.
122 * and it is because a Director has made a connection with
123 * us on the "Message" channel.
125 * Basic tasks done here:
126 * - Create a JCR record
127 * - If it was from the FD, call handle_filed_connection()
128 * - Authenticate the Director
129 * - We wait for a command
130 * - We execute the command
131 * - We continue or exit depending on the return status
133 void *handle_connection_request(void *arg)
135 BSOCK *bs = (BSOCK *)arg;
140 char name[MAX_NAME_LENGTH];
142 if (bnet_recv(bs) <= 0) {
143 Emsg0(M_ERROR, 0, _("Connection request failed.\n"));
149 * Do a sanity check on the message received
151 if (bs->msglen < 25 || bs->msglen > (int)sizeof(name)-25) {
152 Emsg1(M_ERROR, 0, _("Invalid connection. Len=%d\n"), bs->msglen);
157 * See if this is a File daemon connection. If so
160 Dmsg1(110, "Conn: %s", bs->msg);
161 if (sscanf(bs->msg, "Hello Start Job %127s", name) == 1) {
162 handle_filed_connection(bs, name);
167 * This is a connection from the Director, so setup a JCR
169 Dmsg0(110, "Start Dir Job\n");
170 jcr = new_jcr(sizeof(JCR), stored_free_jcr); /* create Job Control Record */
171 jcr->dir_bsock = bs; /* save Director bsock */
172 jcr->dir_bsock->jcr = jcr;
173 jcr->dcrs = New(alist(10, not_owned_by_alist));
174 /* Initialize FD start condition variable */
175 int errstat = pthread_cond_init(&jcr->job_start_wait, NULL);
177 Jmsg1(jcr, M_FATAL, 0, _("Unable to init job cond variable: ERR=%s\n"), strerror(errstat));
181 Dmsg0(1000, "stored in start_job\n");
184 * Authenticate the Director
186 if (!authenticate_director(jcr)) {
187 Jmsg(jcr, M_FATAL, 0, _("Unable to authenticate Director\n"));
190 Dmsg0(90, "Message channel init completed.\n");
192 for (quit=false; !quit;) {
194 if ((bnet_stat = bnet_recv(bs)) <= 0) {
195 break; /* connection terminated */
197 Dmsg1(199, "<dird: %s\n", bs->msg);
199 for (i=0; cmds[i].cmd; i++) {
200 if (strncmp(cmds[i].cmd, bs->msg, strlen(cmds[i].cmd)) == 0) {
201 if ((!cmds[i].monitoraccess) && (jcr->director->monitor)) {
202 Dmsg1(100, "Command %s illegal.\n", cmds[i].cmd);
203 bnet_fsend(bs, illegal_cmd);
204 bnet_sig(bs, BNET_EOD);
207 Dmsg1(200, "Do command: %s\n", cmds[i].cmd);
208 if (!cmds[i].func(jcr)) { /* do command */
209 quit = true; /* error, get out */
210 Dmsg1(190, "Command %s requsts quit\n", cmds[i].cmd);
212 found = true; /* indicate command found */
216 if (!found) { /* command not found */
217 bnet_fsend(bs, derrmsg);
222 generate_daemon_event(jcr, "JobEnd");
223 dequeue_messages(jcr); /* send any queued messages */
224 bnet_sig(bs, BNET_TERMINATE);
230 * Set debug level as requested by the Director
233 static bool setdebug_cmd(JCR *jcr)
235 BSOCK *dir = jcr->dir_bsock;
236 int level, trace_flag;
238 Dmsg1(10, "setdebug_cmd: %s", dir->msg);
239 if (sscanf(dir->msg, "setdebug=%d trace=%d", &level, &trace_flag) != 2 || level < 0) {
240 bnet_fsend(dir, "3991 Bad setdebug command: %s\n", dir->msg);
244 set_trace(trace_flag);
245 return bnet_fsend(dir, OKsetdebug, level);
252 static bool cancel_cmd(JCR *cjcr)
254 BSOCK *dir = cjcr->dir_bsock;
256 char Job[MAX_NAME_LENGTH];
259 if (sscanf(dir->msg, "cancel Job=%127s", Job) == 1) {
260 if (!(jcr=get_jcr_by_full_name(Job))) {
261 bnet_fsend(dir, _("3992 Job %s not found.\n"), Job);
264 oldStatus = jcr->JobStatus;
265 set_jcr_job_status(jcr, JS_Canceled);
266 if (!jcr->authenticated && oldStatus == JS_WaitFD) {
267 pthread_cond_signal(&jcr->job_start_wait); /* wake waiting thread */
270 if (jcr->file_bsock) {
271 bnet_sig(jcr->file_bsock, BNET_TERMINATE);
273 /* If thread waiting on mount, wake him */
274 if (jcr->dcr && jcr->dcr->dev && jcr->dcr->dev->waiting_for_mount()) {
275 pthread_cond_signal(&jcr->dcr->dev->wait_next_vol);
276 pthread_cond_broadcast(&wait_device_release);
278 bnet_fsend(dir, _("3000 Job %s marked to be canceled.\n"), jcr->Job);
282 bnet_fsend(dir, _("3993 Error scanning cancel command.\n"));
284 bnet_sig(dir, BNET_EOD);
292 static bool label_cmd(JCR *jcr)
294 return do_label(jcr, 0);
297 static bool relabel_cmd(JCR *jcr)
299 return do_label(jcr, 1);
302 static bool do_label(JCR *jcr, int relabel)
304 POOLMEM *newname, *oldname, *poolname, *mtype;
306 BSOCK *dir = jcr->dir_bsock;
311 newname = get_memory(dir->msglen+1);
312 oldname = get_memory(dir->msglen+1);
313 poolname = get_memory(dir->msglen+1);
314 mtype = get_memory(dir->msglen+1);
316 if (sscanf(dir->msg, "relabel %127s OldName=%127s NewName=%127s PoolName=%127s MediaType=%127s Slot=%d",
317 dev_name.c_str(), oldname, newname, poolname, mtype, &slot) == 6) {
322 if (sscanf(dir->msg, "label %127s VolumeName=%127s PoolName=%127s MediaType=%127s Slot=%d",
323 dev_name.c_str(), newname, poolname, mtype, &slot) == 5) {
328 unbash_spaces(newname);
329 unbash_spaces(oldname);
330 unbash_spaces(poolname);
331 unbash_spaces(mtype);
332 dev = find_device(jcr, dev_name);
334 /******FIXME**** compare MediaTypes */
335 P(dev->mutex); /* Use P to avoid indefinite block */
336 if (!dev->is_open()) {
337 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
338 force_close_dev(dev);
339 /* Under certain "safe" conditions, we can steal the lock */
340 } else if (dev->can_steal_lock()) {
341 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
342 } else if (dev->is_busy()) {
343 send_dir_busy_message(dir, dev);
344 } else { /* device not being used */
345 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
349 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), dev_name.c_str());
352 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
353 pm_strcpy(jcr->errmsg, dir->msg);
354 bnet_fsend(dir, _("3903 Error scanning label command: %s\n"), jcr->errmsg);
356 free_memory(oldname);
357 free_memory(newname);
358 free_memory(poolname);
360 bnet_sig(dir, BNET_EOD);
365 * Read the tape label and determine if we can safely
366 * label the tape (not a Bacula volume), then label it.
368 * Enter with the mutex set
370 static void label_volume_if_ok(JCR *jcr, DEVICE *dev, char *oldname,
371 char *newname, char *poolname,
372 int slot, int relabel)
374 BSOCK *dir = jcr->dir_bsock;
380 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
382 if (!try_autoload_device(jcr, slot, newname)) {
383 goto bail_out; /* error */
386 /* See what we have for a Volume */
388 label_status = read_dev_volume_label_guess(dcr, 1);
390 label_status = read_dev_volume_label(dcr);
393 switch(label_status) {
395 case VOL_VERSION_ERROR:
396 case VOL_LABEL_ERROR:
400 "3920 Cannot label Volume because it is already labeled: \"%s\"\n"),
401 dev->VolHdr.VolName);
404 /* Relabel request. If oldname matches, continue */
405 if (strcmp(oldname, dev->VolHdr.VolName) != 0) {
406 bnet_fsend(dir, _("3921 Wrong volume mounted.\n"));
409 if (dev->label_type != B_BACULA_LABEL) {
410 bnet_fsend(dir, _("3922 Cannot relabel an ANSI/IBM labeled Volume.\n"));
413 /* Fall through wanted! */
416 if (!write_new_volume_label_to_dev(dcr, newname, poolname)) {
417 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
420 bstrncpy(dcr->VolumeName, newname, sizeof(dcr->VolumeName));
421 /* The following 3000 OK label. string is scanned in ua_label.c */
422 bnet_fsend(dir, "3000 OK label. Volume=%s Device=%s\n",
423 newname, dev->print_name());
426 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
429 bnet_fsend(dir, _("3913 Cannot label Volume. "
430 "Unknown status %d from read_volume_label()\n"), label_status);
435 give_back_device_lock(dev, &hold);
441 * Read the tape label
443 * Enter with the mutex set
445 static bool read_label(DCR *dcr)
449 BSOCK *dir = jcr->dir_bsock;
451 DEVICE *dev = dcr->dev;
453 steal_device_lock(dev, &hold, BST_DOING_ACQUIRE);
455 dcr->VolumeName[0] = 0;
456 dev->clear_labeled(); /* force read of label */
457 switch (read_dev_volume_label(dcr)) {
459 bnet_fsend(dir, _("3001 Mounted Volume: %s\n"), dev->VolHdr.VolName);
463 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device %s because:\n%s"),
464 dev->print_name(), jcr->errmsg);
468 give_back_device_lock(dev, &hold);
472 static DEVICE *find_device(JCR *jcr, POOL_MEM &devname)
475 AUTOCHANGER *changer;
478 unbash_spaces(devname);
480 foreach_res(device, R_DEVICE) {
481 /* Find resource, and make sure we were able to open it */
482 if (fnmatch(device->hdr.name, devname.c_str(), 0) == 0) {
484 device->dev = init_dev(jcr, NULL, device);
487 Jmsg(jcr, M_WARNING, 0, _("\n"
488 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
492 Dmsg1(20, "Found device %s\n", device->hdr.name);
497 foreach_res(changer, R_AUTOCHANGER) {
498 /* Find resource, and make sure we were able to open it */
499 if (fnmatch(devname.c_str(), changer->hdr.name, 0) == 0) {
500 /* Try each device in this AutoChanger */
501 foreach_alist(device, changer->device) {
502 Dmsg1(100, "Try changer device %s\n", device->hdr.name);
504 device->dev = init_dev(jcr, NULL, device);
507 Dmsg1(100, "Device %s could not be opened. Skipped\n", devname.c_str());
508 Jmsg(jcr, M_WARNING, 0, _("\n"
509 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
510 device->hdr.name, devname.c_str());
513 if (!device->dev->autoselect) {
514 continue; /* device is not available */
516 Dmsg1(20, "Found changer device %s\n", device->hdr.name);
520 break; /* we found it but could not open a device */
525 jcr->dcr = new_dcr(jcr, device->dev);
527 jcr->dcr->device = device;
528 return jcr->dcr->dev;
536 * Mount command from Director
538 static bool mount_cmd(JCR *jcr)
541 BSOCK *dir = jcr->dir_bsock;
545 if (sscanf(dir->msg, "mount %127s", devname.c_str()) == 1) {
546 dev = find_device(jcr, devname);
549 P(dev->mutex); /* Use P to avoid indefinite block */
550 switch (dev->dev_blocked) { /* device blocked? */
551 case BST_WAITING_FOR_SYSOP:
552 /* Someone is waiting, wake him */
553 Dmsg0(100, "Waiting for mount. Attempting to wake thread\n");
554 dev->dev_blocked = BST_MOUNT;
555 bnet_fsend(dir, "3001 OK mount. Device=%s\n",
557 pthread_cond_broadcast(&dev->wait_next_vol);
558 pthread_cond_broadcast(&wait_device_release);
561 /* In both of these two cases, we (the user) unmounted the Volume */
562 case BST_UNMOUNTED_WAITING_FOR_SYSOP:
564 /* We freed the device, so reopen it and wake any waiting threads */
565 if (open_dev(dev, NULL, OPEN_READ_WRITE) < 0) {
566 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
570 read_dev_volume_label(dcr);
571 if (dev->dev_blocked == BST_UNMOUNTED) {
572 /* We blocked the device, so unblock it */
573 Dmsg0(100, "Unmounted. Unblocking device\n");
574 read_label(dcr); /* this should not be necessary */
577 Dmsg0(100, "Unmounted waiting for mount. Attempting to wake thread\n");
578 dev->dev_blocked = BST_MOUNT;
580 if (dev->is_labeled()) {
581 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
582 dev->print_name(), dev->VolHdr.VolName);
584 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
585 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
588 pthread_cond_broadcast(&dev->wait_next_vol);
589 pthread_cond_broadcast(&wait_device_release);
592 case BST_DOING_ACQUIRE:
593 bnet_fsend(dir, _("3001 Device %s is mounted; doing acquire.\n"),
597 case BST_WRITING_LABEL:
598 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"),
602 case BST_NOT_BLOCKED:
603 if (dev->is_open()) {
604 if (dev->is_labeled()) {
605 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
606 dev->print_name(), dev->VolHdr.VolName);
608 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
609 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
613 if (!dev->is_tape()) {
617 if (open_dev(dev, NULL, OPEN_READ_WRITE) < 0) {
618 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
623 if (dev->is_labeled()) {
624 bnet_fsend(dir, _("3001 Device %s is already mounted with Volume \"%s\"\n"),
625 dev->print_name(), dev->VolHdr.VolName);
627 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
628 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
635 bnet_fsend(dir, _("3905 Bizarre wait state %d\n"), dev->dev_blocked);
640 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
643 pm_strcpy(jcr->errmsg, dir->msg);
644 bnet_fsend(dir, _("3909 Error scanning mount command: %s\n"), jcr->errmsg);
646 bnet_sig(dir, BNET_EOD);
651 * unmount command from Director
653 static bool unmount_cmd(JCR *jcr)
656 BSOCK *dir = jcr->dir_bsock;
659 if (sscanf(dir->msg, "unmount %127s", devname.c_str()) == 1) {
660 dev = find_device(jcr, devname);
662 P(dev->mutex); /* Use P to avoid indefinite block */
663 if (!dev->is_open()) {
664 Dmsg0(90, "Device already unmounted\n");
665 bnet_fsend(dir, _("3901 Device %s is already unmounted.\n"),
668 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP) {
669 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
671 offline_or_rewind_dev(dev);
672 force_close_dev(dev);
673 dev->dev_blocked = BST_UNMOUNTED_WAITING_FOR_SYSOP;
674 bnet_fsend(dir, _("3001 Device %s unmounted.\n"),
677 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
678 bnet_fsend(dir, _("3902 Device %s is busy in acquire.\n"),
681 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
682 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"),
685 } else if (dev->is_busy()) {
686 send_dir_busy_message(dir, dev);
687 } else { /* device not being used */
688 Dmsg0(90, "Device not in use, unmounting\n");
689 /* On FreeBSD, I am having ASSERT() failures in block_device()
690 * and I can only imagine that the thread id that we are
691 * leaving in no_wait_id is being re-used. So here,
692 * we simply do it by hand. Gross, but a solution.
694 /* block_device(dev, BST_UNMOUNTED); replace with 2 lines below */
695 dev->dev_blocked = BST_UNMOUNTED;
697 offline_or_rewind_dev(dev);
698 force_close_dev(dev);
699 bnet_fsend(dir, _("3002 Device %s unmounted.\n"),
704 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
707 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
708 pm_strcpy(jcr->errmsg, dir->msg);
709 bnet_fsend(dir, _("3907 Error scanning unmount command: %s\n"), jcr->errmsg);
711 bnet_sig(dir, BNET_EOD);
716 * Release command from Director. This rewinds the device and if
717 * configured does a offline and ensures that Bacula will
718 * re-read the label of the tape before continuing. This gives
719 * the operator the chance to change the tape anytime before the
722 static bool release_cmd(JCR *jcr)
725 BSOCK *dir = jcr->dir_bsock;
728 if (sscanf(dir->msg, "release %127s", devname.c_str()) == 1) {
729 dev = find_device(jcr, devname);
731 P(dev->mutex); /* Use P to avoid indefinite block */
732 if (!dev->is_open()) {
733 Dmsg0(90, "Device already released\n");
734 bnet_fsend(dir, _("3911 Device %s already released.\n"),
737 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
738 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP) {
739 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
741 bnet_fsend(dir, _("3912 Device %s waiting for mount.\n"),
744 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
745 bnet_fsend(dir, _("3913 Device %s is busy in acquire.\n"),
748 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
749 bnet_fsend(dir, _("3914 Device %s is being labeled.\n"),
752 } else if (dev->is_busy()) {
753 send_dir_busy_message(dir, dev);
754 } else { /* device not being used */
755 Dmsg0(90, "Device not in use, unmounting\n");
756 release_volume(jcr->dcr);
757 bnet_fsend(dir, _("3012 Device %s released.\n"),
762 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
765 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
766 pm_strcpy(jcr->errmsg, dir->msg);
767 bnet_fsend(dir, _("3917 Error scanning release command: %s\n"), jcr->errmsg);
769 bnet_sig(dir, BNET_EOD);
776 * Autochanger command from Director
778 static bool autochanger_cmd(JCR *jcr)
781 BSOCK *dir = jcr->dir_bsock;
784 const char *cmd = NULL;
787 if (sscanf(dir->msg, "autochanger list %127s ", devname.c_str()) == 1) {
790 } else if (sscanf(dir->msg, "autochanger slots %127s ", devname.c_str()) == 1) {
795 dev = find_device(jcr, devname);
798 P(dev->mutex); /* Use P to avoid indefinite block */
799 if (!dev->is_tape()) {
800 bnet_fsend(dir, _("3995 Device %s is not an autochanger.\n"),
802 } else if (!dev->is_open()) {
803 autochanger_cmd(dcr, dir, cmd);
804 /* Under certain "safe" conditions, we can steal the lock */
805 } else if (dev->can_steal_lock()) {
806 autochanger_cmd(dcr, dir, cmd);
807 } else if (dev->is_busy()) {
808 send_dir_busy_message(dir, dev);
809 } else { /* device not being used */
810 autochanger_cmd(dcr, dir, cmd);
814 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
816 } else { /* error on scanf */
817 pm_strcpy(jcr->errmsg, dir->msg);
818 bnet_fsend(dir, _("3908 Error scanning autocharger list/slots command: %s\n"),
821 bnet_sig(dir, BNET_EOD);
826 * Read and return the Volume label
828 static bool readlabel_cmd(JCR *jcr)
831 BSOCK *dir = jcr->dir_bsock;
835 if (sscanf(dir->msg, "readlabel %127s Slot=%d", devname.c_str(), &Slot) == 2) {
836 dev = find_device(jcr, devname);
838 P(dev->mutex); /* Use P to avoid indefinite block */
839 if (!dev->is_open()) {
840 read_volume_label(jcr, dev, Slot);
841 force_close_dev(dev);
842 /* Under certain "safe" conditions, we can steal the lock */
843 } else if (dev->can_steal_lock()) {
844 read_volume_label(jcr, dev, Slot);
845 } else if (dev->is_busy()) {
846 send_dir_busy_message(dir, dev);
847 } else { /* device not being used */
848 read_volume_label(jcr, dev, Slot);
852 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
855 pm_strcpy(jcr->errmsg, dir->msg);
856 bnet_fsend(dir, _("3909 Error scanning readlabel command: %s\n"), jcr->errmsg);
858 bnet_sig(dir, BNET_EOD);
863 * Read the tape label
865 * Enter with the mutex set
867 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot)
869 BSOCK *dir = jcr->dir_bsock;
874 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
876 if (!try_autoload_device(jcr, Slot, "")) {
877 goto bail_out; /* error */
880 dev->clear_labeled(); /* force read of label */
881 switch (read_dev_volume_label(dcr)) {
883 /* DO NOT add quotes around the Volume name. It is scanned in the DIR */
884 bnet_fsend(dir, _("3001 Volume=%s Slot=%d\n"), dev->VolHdr.VolName, Slot);
885 Dmsg1(100, "Volume: %s\n", dev->VolHdr.VolName);
888 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device %s because:\n%s"),
889 dev->print_name(), jcr->errmsg);
894 give_back_device_lock(dev, &hold);
898 static bool try_autoload_device(JCR *jcr, int slot, const char *VolName)
901 BSOCK *dir = jcr->dir_bsock;
902 DEVICE *dev = dcr->dev;
904 bstrncpy(dcr->VolumeName, VolName, sizeof(dcr->VolumeName));
905 dcr->VolCatInfo.Slot = slot;
906 dcr->VolCatInfo.InChanger = slot > 0;
907 if (autoload_device(dcr, 0, dir) < 0) { /* autoload if possible */
911 /* Ensure that the device is open -- autoload_device() closes it */
912 for ( ; !dev->is_open(); ) {
913 if (open_dev(dev, dcr->VolumeName, OPEN_READ_WRITE) < 0) {
914 bnet_fsend(dir, _("3910 Unable to open device %s: ERR=%s\n"),
915 dev->print_name(), dev->strerror());
922 static void send_dir_busy_message(BSOCK *dir, DEVICE *dev)
924 if (dev->can_read()) {
925 bnet_fsend(dir, _("3911 Device %s is busy reading.\n"),
928 bnet_fsend(dir, _("3912 Device %s is busy with %d writer(s).\n"),
929 dev->print_name(), dev->num_writers);