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 device=", 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);
166 Dmsg0(110, "Start Dir Job\n");
167 jcr = new_jcr(sizeof(JCR), stored_free_jcr); /* create Job Control Record */
168 jcr->dir_bsock = bs; /* save Director bsock */
169 jcr->dir_bsock->jcr = jcr;
170 jcr->dcrs = New(alist(10, not_owned_by_alist));
171 /* Initialize FD start condition variable */
172 int errstat = pthread_cond_init(&jcr->job_start_wait, NULL);
174 Jmsg1(jcr, M_FATAL, 0, _("Unable to init job cond variable: ERR=%s\n"), strerror(errstat));
178 Dmsg0(1000, "stored in start_job\n");
181 * Authenticate the Director
183 if (!authenticate_director(jcr)) {
184 Jmsg(jcr, M_FATAL, 0, _("Unable to authenticate Director\n"));
187 Dmsg0(90, "Message channel init completed.\n");
189 for (quit=false; !quit;) {
191 if ((bnet_stat = bnet_recv(bs)) <= 0) {
192 break; /* connection terminated */
194 Dmsg1(199, "<dird: %s\n", bs->msg);
196 for (i=0; cmds[i].cmd; i++) {
197 if (strncmp(cmds[i].cmd, bs->msg, strlen(cmds[i].cmd)) == 0) {
198 if ((!cmds[i].monitoraccess) && (jcr->director->monitor)) {
199 Dmsg1(100, "Command %s illegal.\n", cmds[i].cmd);
200 bnet_fsend(bs, illegal_cmd);
201 bnet_sig(bs, BNET_EOD);
204 Dmsg1(200, "Do command: %s\n", cmds[i].cmd);
205 if (!cmds[i].func(jcr)) { /* do command */
206 quit = true; /* error, get out */
207 Dmsg1(190, "Command %s requsts quit\n", cmds[i].cmd);
209 found = true; /* indicate command found */
213 if (!found) { /* command not found */
214 bnet_fsend(bs, derrmsg);
219 dequeue_messages(jcr); /* send any queued messages */
220 bnet_sig(bs, BNET_TERMINATE);
226 * Set debug level as requested by the Director
229 static bool setdebug_cmd(JCR *jcr)
231 BSOCK *dir = jcr->dir_bsock;
232 int level, trace_flag;
234 Dmsg1(10, "setdebug_cmd: %s", dir->msg);
235 if (sscanf(dir->msg, "setdebug=%d trace=%d", &level, &trace_flag) != 2 || level < 0) {
236 bnet_fsend(dir, "3991 Bad setdebug command: %s\n", dir->msg);
240 set_trace(trace_flag);
241 return bnet_fsend(dir, OKsetdebug, level);
248 static bool cancel_cmd(JCR *cjcr)
250 BSOCK *dir = cjcr->dir_bsock;
252 char Job[MAX_NAME_LENGTH];
255 if (sscanf(dir->msg, "cancel Job=%127s", Job) == 1) {
256 if (!(jcr=get_jcr_by_full_name(Job))) {
257 bnet_fsend(dir, _("3992 Job %s not found.\n"), Job);
260 oldStatus = jcr->JobStatus;
261 set_jcr_job_status(jcr, JS_Canceled);
262 if (!jcr->authenticated && oldStatus == JS_WaitFD) {
263 pthread_cond_signal(&jcr->job_start_wait); /* wake waiting thread */
266 if (jcr->file_bsock) {
267 bnet_sig(jcr->file_bsock, BNET_TERMINATE);
269 /* If thread waiting on mount, wake him */
270 if (jcr->dcr && jcr->dcr->dev &&
271 (jcr->dcr->dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
272 jcr->dcr->dev->dev_blocked == BST_UNMOUNTED ||
273 jcr->dcr->dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP)) {
274 pthread_cond_signal(&jcr->dcr->dev->wait_next_vol);
276 bnet_fsend(dir, _("3000 Job %s marked to be canceled.\n"), jcr->Job);
280 bnet_fsend(dir, _("3993 Error scanning cancel command.\n"));
282 bnet_sig(dir, BNET_EOD);
290 static bool label_cmd(JCR *jcr)
292 return do_label(jcr, 0);
295 static bool relabel_cmd(JCR *jcr)
297 return do_label(jcr, 1);
300 static bool do_label(JCR *jcr, int relabel)
302 POOLMEM *newname, *oldname, *poolname, *mtype;
304 BSOCK *dir = jcr->dir_bsock;
309 newname = get_memory(dir->msglen+1);
310 oldname = get_memory(dir->msglen+1);
311 poolname = get_memory(dir->msglen+1);
312 mtype = get_memory(dir->msglen+1);
314 if (sscanf(dir->msg, "relabel %127s OldName=%127s NewName=%127s PoolName=%127s MediaType=%127s Slot=%d",
315 dev_name.c_str(), oldname, newname, poolname, mtype, &slot) == 6) {
320 if (sscanf(dir->msg, "label %127s VolumeName=%127s PoolName=%127s MediaType=%127s Slot=%d",
321 dev_name.c_str(), newname, poolname, mtype, &slot) == 5) {
326 unbash_spaces(newname);
327 unbash_spaces(oldname);
328 unbash_spaces(poolname);
329 unbash_spaces(mtype);
330 dev = find_device(jcr, dev_name);
332 /******FIXME**** compare MediaTypes */
333 P(dev->mutex); /* Use P to avoid indefinite block */
334 if (!dev->is_open()) {
335 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
336 force_close_dev(dev);
337 /* Under certain "safe" conditions, we can steal the lock */
338 } else if (dev->can_steal_lock()) {
339 label_volume_if_ok(jcr, dev, oldname, newname, poolname, slot, relabel);
340 } else if (dev->is_busy()) {
341 send_dir_busy_message(dir, dev);
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"), dev_name.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 */
386 label_status = read_dev_volume_label_guess(dcr, 1);
388 label_status = read_dev_volume_label(dcr);
391 switch(label_status) {
393 case VOL_VERSION_ERROR:
394 case VOL_LABEL_ERROR:
398 "3920 Cannot label Volume because it is already labeled: \"%s\"\n"),
399 dev->VolHdr.VolName);
402 /* Relabel request. If oldname matches, continue */
403 if (strcmp(oldname, dev->VolHdr.VolName) != 0) {
404 bnet_fsend(dir, _("3921 Wrong volume mounted.\n"));
407 if (dev->label_type != B_BACULA_LABEL) {
408 bnet_fsend(dir, _("3922 Cannot relabel an ANSI/IBM labeled Volume.\n"));
411 /* Fall through wanted! */
414 if (!write_new_volume_label_to_dev(dcr, newname, poolname)) {
415 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
418 bstrncpy(dcr->VolumeName, newname, sizeof(dcr->VolumeName));
419 /* The following 3000 OK label. string is scanned in ua_label.c */
420 bnet_fsend(dir, "3000 OK label. Volume=%s Device=%s\n",
421 newname, dev->print_name());
424 bnet_fsend(dir, _("3912 Failed to label Volume: ERR=%s\n"), strerror_dev(dev));
427 bnet_fsend(dir, _("3913 Cannot label Volume. "
428 "Unknown status %d from read_volume_label()\n"), label_status);
433 give_back_device_lock(dev, &hold);
439 * Read the tape label
441 * Enter with the mutex set
443 static bool read_label(DCR *dcr)
447 BSOCK *dir = jcr->dir_bsock;
449 DEVICE *dev = dcr->dev;
451 steal_device_lock(dev, &hold, BST_DOING_ACQUIRE);
453 dcr->VolumeName[0] = 0;
454 dev->state &= ~ST_LABEL; /* force read of label */
455 switch (read_dev_volume_label(dcr)) {
457 bnet_fsend(dir, _("3001 Mounted Volume: %s\n"), dev->VolHdr.VolName);
461 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device %s because:\n%s"),
462 dev->print_name(), jcr->errmsg);
466 give_back_device_lock(dev, &hold);
470 static DEVICE *find_device(JCR *jcr, POOL_MEM &devname)
473 AUTOCHANGER *changer;
476 unbash_spaces(devname);
478 foreach_res(device, R_DEVICE) {
479 /* Find resource, and make sure we were able to open it */
480 if (fnmatch(device->hdr.name, devname.c_str(), 0) == 0) {
482 device->dev = init_dev(jcr, NULL, device);
485 Jmsg(jcr, M_WARNING, 0, _("\n"
486 " Device \"%s\" requested by DIR could not be opened or does not exist.\n"),
490 Dmsg1(20, "Found device %s\n", device->hdr.name);
495 foreach_res(changer, R_AUTOCHANGER) {
496 /* Find resource, and make sure we were able to open it */
497 if (fnmatch(devname.c_str(), changer->hdr.name, 0) == 0) {
498 /* Try each device in this AutoChanger */
499 foreach_alist(device, changer->device) {
500 Dmsg1(100, "Try changer device %s\n", device->hdr.name);
502 device->dev = init_dev(jcr, NULL, device);
505 Dmsg1(100, "Device %s could not be opened. Skipped\n", devname.c_str());
506 Jmsg(jcr, M_WARNING, 0, _("\n"
507 " Device \"%s\" in changer \"%s\" requested by DIR could not be opened or does not exist.\n"),
508 device->hdr.name, devname.c_str());
511 if (!device->dev->autoselect) {
512 continue; /* device is not available */
514 Dmsg1(20, "Found changer device %s\n", device->hdr.name);
518 break; /* we found it but could not open a device */
523 jcr->dcr = new_dcr(jcr, device->dev);
525 jcr->dcr->device = device;
526 return jcr->dcr->dev;
534 * Mount command from Director
536 static bool mount_cmd(JCR *jcr)
539 BSOCK *dir = jcr->dir_bsock;
543 if (sscanf(dir->msg, "mount %127s", devname.c_str()) == 1) {
544 dev = find_device(jcr, devname);
547 P(dev->mutex); /* Use P to avoid indefinite block */
548 switch (dev->dev_blocked) { /* device blocked? */
549 case BST_WAITING_FOR_SYSOP:
550 /* Someone is waiting, wake him */
551 Dmsg0(100, "Waiting for mount. Attempting to wake thread\n");
552 dev->dev_blocked = BST_MOUNT;
553 bnet_fsend(dir, "3001 OK mount. Device=%s\n",
555 pthread_cond_signal(&dev->wait_next_vol);
558 /* In both of these two cases, we (the user) unmounted the Volume */
559 case BST_UNMOUNTED_WAITING_FOR_SYSOP:
561 /* We freed the device, so reopen it and wake any waiting threads */
562 if (open_dev(dev, NULL, OPEN_READ_WRITE) < 0) {
563 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
567 read_dev_volume_label(dcr);
568 if (dev->dev_blocked == BST_UNMOUNTED) {
569 /* We blocked the device, so unblock it */
570 Dmsg0(100, "Unmounted. Unblocking device\n");
571 read_label(dcr); /* this should not be necessary */
574 Dmsg0(100, "Unmounted waiting for mount. Attempting to wake thread\n");
575 dev->dev_blocked = BST_MOUNT;
577 if (dev->is_labeled()) {
578 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
579 dev->print_name(), dev->VolHdr.VolName);
581 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
582 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
585 pthread_cond_signal(&dev->wait_next_vol);
588 case BST_DOING_ACQUIRE:
589 bnet_fsend(dir, _("3001 Device %s is mounted; doing acquire.\n"),
593 case BST_WRITING_LABEL:
594 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"),
598 case BST_NOT_BLOCKED:
599 if (dev->is_open()) {
600 if (dev->is_labeled()) {
601 bnet_fsend(dir, _("3001 Device %s is mounted with Volume \"%s\"\n"),
602 dev->print_name(), dev->VolHdr.VolName);
604 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
605 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
609 if (!dev_is_tape(dev)) {
610 bnet_fsend(dir, _("3906 cannot mount non-tape.\n"));
613 if (open_dev(dev, NULL, OPEN_READ_WRITE) < 0) {
614 bnet_fsend(dir, _("3901 open device failed: ERR=%s\n"),
619 if (dev->is_labeled()) {
620 bnet_fsend(dir, _("3001 Device %s is already mounted with Volume \"%s\"\n"),
621 dev->print_name(), dev->VolHdr.VolName);
623 bnet_fsend(dir, _("3905 Device %s open but no Bacula volume is mounted.\n"
624 "If this is not a blank tape, try unmounting and remounting the Volume.\n"),
631 bnet_fsend(dir, _("3905 Bizarre wait state %d\n"), dev->dev_blocked);
636 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
639 pm_strcpy(jcr->errmsg, dir->msg);
640 bnet_fsend(dir, _("3909 Error scanning mount command: %s\n"), jcr->errmsg);
642 bnet_sig(dir, BNET_EOD);
647 * unmount command from Director
649 static bool unmount_cmd(JCR *jcr)
652 BSOCK *dir = jcr->dir_bsock;
655 if (sscanf(dir->msg, "unmount %127s", devname.c_str()) == 1) {
656 dev = find_device(jcr, devname);
658 P(dev->mutex); /* Use P to avoid indefinite block */
659 if (!dev->is_open()) {
660 Dmsg0(90, "Device already unmounted\n");
661 bnet_fsend(dir, _("3901 Device %s is already unmounted.\n"),
664 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP) {
665 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
667 open_dev(dev, NULL, 0); /* fake open for close */
668 offline_or_rewind_dev(dev);
669 force_close_dev(dev);
670 dev->dev_blocked = BST_UNMOUNTED_WAITING_FOR_SYSOP;
671 bnet_fsend(dir, _("3001 Device %s unmounted.\n"),
674 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
675 bnet_fsend(dir, _("3902 Device %s is busy in acquire.\n"),
678 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
679 bnet_fsend(dir, _("3903 Device %s is being labeled.\n"),
682 } else if (dev->is_busy()) {
683 send_dir_busy_message(dir, dev);
684 } else { /* device not being used */
685 Dmsg0(90, "Device not in use, unmounting\n");
686 /* On FreeBSD, I am having ASSERT() failures in block_device()
687 * and I can only imagine that the thread id that we are
688 * leaving in no_wait_id is being re-used. So here,
689 * we simply do it by hand. Gross, but a solution.
691 /* block_device(dev, BST_UNMOUNTED); replace with 2 lines below */
692 dev->dev_blocked = BST_UNMOUNTED;
694 open_dev(dev, NULL, 0); /* fake open for close */
695 offline_or_rewind_dev(dev);
696 force_close_dev(dev);
697 bnet_fsend(dir, _("3002 Device %s unmounted.\n"),
702 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
705 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
706 pm_strcpy(jcr->errmsg, dir->msg);
707 bnet_fsend(dir, _("3907 Error scanning unmount command: %s\n"), jcr->errmsg);
709 bnet_sig(dir, BNET_EOD);
714 * Release command from Director. This rewinds the device and if
715 * configured does a offline and ensures that Bacula will
716 * re-read the label of the tape before continuing. This gives
717 * the operator the chance to change the tape anytime before the
720 static bool release_cmd(JCR *jcr)
723 BSOCK *dir = jcr->dir_bsock;
726 if (sscanf(dir->msg, "release %127s", devname.c_str()) == 1) {
727 dev = find_device(jcr, devname);
729 P(dev->mutex); /* Use P to avoid indefinite block */
730 if (!dev->is_open()) {
731 Dmsg0(90, "Device already released\n");
732 bnet_fsend(dir, _("3911 Device %s already released.\n"),
735 } else if (dev->dev_blocked == BST_WAITING_FOR_SYSOP ||
736 dev->dev_blocked == BST_UNMOUNTED_WAITING_FOR_SYSOP) {
737 Dmsg2(90, "%d waiter dev_block=%d. doing unmount\n", dev->num_waiting,
739 bnet_fsend(dir, _("3912 Device %s waiting for mount.\n"),
742 } else if (dev->dev_blocked == BST_DOING_ACQUIRE) {
743 bnet_fsend(dir, _("3913 Device %s is busy in acquire.\n"),
746 } else if (dev->dev_blocked == BST_WRITING_LABEL) {
747 bnet_fsend(dir, _("3914 Device %s is being labeled.\n"),
750 } else if (dev->is_busy()) {
751 send_dir_busy_message(dir, dev);
752 } else { /* device not being used */
753 Dmsg0(90, "Device not in use, unmounting\n");
754 release_volume(jcr->dcr);
755 bnet_fsend(dir, _("3012 Device %s released.\n"),
760 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
763 /* NB dir->msg gets clobbered in bnet_fsend, so save command */
764 pm_strcpy(jcr->errmsg, dir->msg);
765 bnet_fsend(dir, _("3917 Error scanning release command: %s\n"), jcr->errmsg);
767 bnet_sig(dir, BNET_EOD);
774 * Autochanger command from Director
776 static bool autochanger_cmd(JCR *jcr)
779 BSOCK *dir = jcr->dir_bsock;
782 const char *cmd = NULL;
785 if (sscanf(dir->msg, "autochanger list %127s ", devname.c_str()) == 1) {
788 } else if (sscanf(dir->msg, "autochanger slots %127s ", devname.c_str()) == 1) {
793 dev = find_device(jcr, devname);
796 P(dev->mutex); /* Use P to avoid indefinite block */
797 if (!dev_is_tape(dev)) {
798 bnet_fsend(dir, _("3995 Device %s is not an autochanger.\n"),
800 } else if (!dev->is_open()) {
801 autochanger_cmd(dcr, dir, cmd);
802 /* Under certain "safe" conditions, we can steal the lock */
803 } else if (dev->can_steal_lock()) {
804 autochanger_cmd(dcr, dir, cmd);
805 } else if (dev->is_busy()) {
806 send_dir_busy_message(dir, dev);
807 } else { /* device not being used */
808 autochanger_cmd(dcr, dir, cmd);
812 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
814 } else { /* error on scanf */
815 pm_strcpy(jcr->errmsg, dir->msg);
816 bnet_fsend(dir, _("3908 Error scanning autocharger list/slots command: %s\n"),
819 bnet_sig(dir, BNET_EOD);
824 * Read and return the Volume label
826 static bool readlabel_cmd(JCR *jcr)
829 BSOCK *dir = jcr->dir_bsock;
833 if (sscanf(dir->msg, "readlabel %127s Slot=%d", devname.c_str(), &Slot) == 2) {
834 dev = find_device(jcr, devname);
836 P(dev->mutex); /* Use P to avoid indefinite block */
837 if (!dev->is_open()) {
838 read_volume_label(jcr, dev, Slot);
839 force_close_dev(dev);
840 /* Under certain "safe" conditions, we can steal the lock */
841 } else if (dev->can_steal_lock()) {
842 read_volume_label(jcr, dev, Slot);
843 } else if (dev->is_busy()) {
844 send_dir_busy_message(dir, dev);
845 } else { /* device not being used */
846 read_volume_label(jcr, dev, Slot);
850 bnet_fsend(dir, _("3999 Device \"%s\" not found\n"), devname.c_str());
853 pm_strcpy(jcr->errmsg, dir->msg);
854 bnet_fsend(dir, _("3909 Error scanning readlabel command: %s\n"), jcr->errmsg);
856 bnet_sig(dir, BNET_EOD);
861 * Read the tape label
863 * Enter with the mutex set
865 static void read_volume_label(JCR *jcr, DEVICE *dev, int Slot)
867 BSOCK *dir = jcr->dir_bsock;
872 steal_device_lock(dev, &hold, BST_WRITING_LABEL);
874 if (!try_autoload_device(jcr, Slot, "")) {
875 goto bail_out; /* error */
878 dev->state &= ~ST_LABEL; /* force read of label */
879 switch (read_dev_volume_label(dcr)) {
881 /* DO NOT add quotes around the Volume name. It is scanned in the DIR */
882 bnet_fsend(dir, _("3001 Volume=%s Slot=%d\n"), dev->VolHdr.VolName, Slot);
883 Dmsg1(100, "Volume: %s\n", dev->VolHdr.VolName);
886 bnet_fsend(dir, _("3902 Cannot mount Volume on Storage Device %s because:\n%s"),
887 dev->print_name(), jcr->errmsg);
892 give_back_device_lock(dev, &hold);
896 static bool try_autoload_device(JCR *jcr, int slot, const char *VolName)
899 BSOCK *dir = jcr->dir_bsock;
900 DEVICE *dev = dcr->dev;
902 bstrncpy(dcr->VolumeName, VolName, sizeof(dcr->VolumeName));
903 dcr->VolCatInfo.Slot = slot;
904 dcr->VolCatInfo.InChanger = slot > 0;
905 if (autoload_device(dcr, 0, dir) < 0) { /* autoload if possible */
909 /* Ensure that the device is open -- autoload_device() closes it */
910 for ( ; !dev->is_open(); ) {
911 if (open_dev(dev, dcr->VolumeName, OPEN_READ_WRITE) < 0) {
912 bnet_fsend(dir, _("3910 Unable to open device %s: ERR=%s\n"),
913 dev->print_name(), dev->strerror());
920 static void send_dir_busy_message(BSOCK *dir, DEVICE *dev)
922 if (dev->can_read()) {
923 bnet_fsend(dir, _("3911 Device %s is busy reading.\n"),
926 bnet_fsend(dir, _("3912 Device %s is busy with %d writer(s).\n"),
927 dev->print_name(), dev->num_writers);