3 * dev.c -- low level operations on device (storage device)
7 * NOTE!!!! None of these routines are reentrant. You must
8 * use lock_device() and unlock_device() at a higher level,
9 * or use the xxx_device() equivalents. By moving the
10 * thread synchronization to a higher level, we permit
11 * the higher level routines to "seize" the device and
12 * to carry out operations without worrying about who
13 * set what lock (i.e. race conditions).
15 * Note, this is the device dependent code, and my have
16 * to be modified for each system, but is meant to
17 * be as "generic" as possible.
19 * The purpose of this code is to develop a SIMPLE Storage
20 * daemon. More complicated coding (double buffering, writer
21 * thread, ...) is left for a later version.
23 * Unfortunately, I have had to add more and more complication
24 * to this code. This was not foreseen as noted above, and as
25 * a consequence has lead to something more contorted than is
26 * really necessary -- KES. Note, this contortion has been
27 * corrected to a large extent by a rewrite (Apr MMI).
32 Copyright (C) 2000-2004 Kern Sibbald and John Walker
34 This program is free software; you can redistribute it and/or
35 modify it under the terms of the GNU General Public License as
36 published by the Free Software Foundation; either version 2 of
37 the License, or (at your option) any later version.
39 This program is distributed in the hope that it will be useful,
40 but WITHOUT ANY WARRANTY; without even the implied warranty of
41 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
42 General Public License for more details.
44 You should have received a copy of the GNU General Public
45 License along with this program; if not, write to the Free
46 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
52 * Handling I/O errors and end of tape conditions are a bit tricky.
53 * This is how it is currently done when writting.
54 * On either an I/O error or end of tape,
55 * we will stop writing on the physical device (no I/O recovery is
56 * attempted at least in this daemon). The state flag will be sent
57 * to include ST_EOT, which is ephimeral, and ST_WEOT, which is
58 * persistent. Lots of routines clear ST_EOT, but ST_WEOT is
59 * cleared only when the problem goes away. Now when ST_WEOT
60 * is set all calls to write_dev() are handled as usual. However,
61 * in write_block() instead of attempting to write the block to
62 * the physical device, it is chained into a list of blocks written
63 * after the EOT condition. In addition, all threads are blocked
64 * from writing on the tape by calling lock(), and thread other
65 * than the first thread to hit the EOT will block on a condition
66 * variable. The first thread to hit the EOT will continue to
67 * be able to read and write the tape (he sort of tunnels through
68 * the locking mechanism -- see lock() for details).
70 * Now presumably somewhere higher in the chain of command
71 * (device.c), someone will notice the EOT condition and
72 * get a new tape up, get the tape label read, and mark
73 * the label for rewriting. Then this higher level routine
74 * will write the unwritten buffer to the new volume.
75 * Finally, he will release
76 * any blocked threads by doing a broadcast on the condition
77 * variable. At that point, we should be totally back in
78 * business with no lost data.
85 /* Forward referenced functions */
88 * Allocate and initialize the DEVICE structure
89 * Note, if dev is non-NULL, it is already allocated,
90 * thus we neither allocate it nor free it. This allows
91 * the caller to put the packet in shared memory.
93 * Note, for a tape, the device->device_name is the device name
94 * (e.g. /dev/nst0), and for a file, the device name
95 * is the directory in which the file will be placed.
99 init_dev(DEVICE *dev, DEVRES *device)
106 /* Check that device is available */
107 if (stat(device->device_name, &statp) < 0) {
109 dev->dev_errno = errno;
111 Emsg2(M_FATAL, 0, "Unable to stat device %s : %s\n", device->device_name,
117 if (S_ISDIR(statp.st_mode)) {
119 } else if (S_ISCHR(statp.st_mode)) {
121 } else if (S_ISFIFO(statp.st_mode)) {
125 dev->dev_errno = ENODEV;
127 Emsg2(M_FATAL, 0, _("%s is an unknown device type. Must be tape or directory. st_mode=%x\n"),
128 dev_name, statp.st_mode);
132 dev = (DEVICE *)get_memory(sizeof(DEVICE));
133 memset(dev, 0, sizeof(DEVICE));
134 dev->state = ST_MALLOC;
136 memset(dev, 0, sizeof(DEVICE));
139 /* Copy user supplied device parameters from Resource */
140 dev->dev_name = get_memory(strlen(device->device_name)+1);
141 strcpy(dev->dev_name, device->device_name);
142 dev->capabilities = device->cap_bits;
143 dev->min_block_size = device->min_block_size;
144 dev->max_block_size = device->max_block_size;
145 dev->max_volume_size = device->max_volume_size;
146 dev->max_file_size = device->max_file_size;
147 dev->volume_capacity = device->volume_capacity;
148 dev->max_rewind_wait = device->max_rewind_wait;
149 dev->max_open_wait = device->max_open_wait;
150 dev->max_open_vols = device->max_open_vols;
151 dev->vol_poll_interval = device->vol_poll_interval;
153 if (dev->vol_poll_interval && dev->vol_poll_interval < 60) {
154 dev->vol_poll_interval = 60;
156 dev->device = device;
159 dev->state |= ST_TAPE;
161 dev->state |= ST_FIFO;
162 dev->capabilities |= CAP_STREAM; /* set stream device */
164 dev->state |= ST_FILE;
167 if (dev->max_block_size > 1000000) {
168 Emsg3(M_ERROR, 0, _("Block size %u on device %s is too large, using default %u\n"),
169 dev->max_block_size, dev->dev_name, DEFAULT_BLOCK_SIZE);
170 dev->max_block_size = 0;
172 if (dev->max_block_size % TAPE_BSIZE != 0) {
173 Emsg2(M_WARNING, 0, _("Max block size %u not multiple of device %s block size.\n"),
174 dev->max_block_size, dev->dev_name);
177 dev->errmsg = get_pool_memory(PM_EMSG);
180 if ((errstat = pthread_mutex_init(&dev->mutex, NULL)) != 0) {
181 dev->dev_errno = errstat;
182 Mmsg1(&dev->errmsg, _("Unable to init mutex: ERR=%s\n"), strerror(errstat));
183 Emsg0(M_FATAL, 0, dev->errmsg);
185 if ((errstat = pthread_cond_init(&dev->wait, NULL)) != 0) {
186 dev->dev_errno = errstat;
187 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
188 Emsg0(M_FATAL, 0, dev->errmsg);
190 if ((errstat = pthread_cond_init(&dev->wait_next_vol, NULL)) != 0) {
191 dev->dev_errno = errstat;
192 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
193 Emsg0(M_FATAL, 0, dev->errmsg);
196 dev->attached_dcrs = new dlist(dcr, &dcr->dev_link);
197 Dmsg2(29, "init_dev: tape=%d dev_name=%s\n", dev_is_tape(dev), dev->dev_name);
202 /* Open the device with the operating system and
203 * initialize buffer pointers.
205 * Note, for a tape, the VolName is the name we give to the
206 * volume (not really used here), but for a file, the
207 * VolName represents the name of the file to be created/opened.
208 * In the case of a file, the full name is the device name
209 * (archive_name) with the VolName concatenated.
212 open_dev(DEVICE *dev, char *VolName, int mode)
214 POOLMEM *archive_name;
216 if (dev->state & ST_OPENED) {
218 * *****FIXME***** how to handle two threads wanting
219 * different volumes mounted???? E.g. one is waiting
220 * for the next volume to be mounted, and a new job
221 * starts and snatches up the device.
223 if (VolName && strcmp(dev->VolCatInfo.VolCatName, VolName) != 0) {
227 Mmsg2(&dev->errmsg, _("WARNING!!!! device %s opened %d times!!!\n"),
228 dev->dev_name, dev->use_count);
229 Emsg1(M_WARNING, 0, "%s", dev->errmsg);
233 bstrncpy(dev->VolCatInfo.VolCatName, VolName, sizeof(dev->VolCatInfo.VolCatName));
236 Dmsg3(29, "open_dev: tape=%d dev_name=%s vol=%s\n", dev_is_tape(dev),
237 dev->dev_name, dev->VolCatInfo.VolCatName);
238 dev->state &= ~(ST_LABEL|ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
239 if (dev->state & (ST_TAPE|ST_FIFO)) {
241 Dmsg0(29, "open_dev: device is tape\n");
242 if (mode == OPEN_READ_WRITE) {
243 dev->mode = O_RDWR | O_BINARY;
244 } else if (mode == OPEN_READ_ONLY) {
245 dev->mode = O_RDONLY | O_BINARY;
246 } else if (mode == OPEN_WRITE_ONLY) {
247 dev->mode = O_WRONLY | O_BINARY;
249 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
251 timeout = dev->max_open_wait;
253 if (dev->state & ST_FIFO && timeout) {
255 dev->tid = start_thread_timer(pthread_self(), timeout);
257 /* If busy retry each second for max_open_wait seconds */
258 while ((dev->fd = open(dev->dev_name, dev->mode, MODE_RW)) < 0) {
259 if (errno == EINTR || errno == EAGAIN) {
262 if (errno == EBUSY && timeout-- > 0) {
263 Dmsg2(100, "Device %s busy. ERR=%s\n", dev->dev_name, strerror(errno));
267 dev->dev_errno = errno;
268 Mmsg2(&dev->errmsg, _("stored: unable to open device %s: ERR=%s\n"),
269 dev->dev_name, strerror(dev->dev_errno));
270 /* Stop any open timer we set */
272 stop_thread_timer(dev->tid);
275 Emsg0(M_FATAL, 0, dev->errmsg);
280 dev->state |= ST_OPENED;
282 update_pos_dev(dev); /* update position */
284 /* Stop any open() timer we started */
286 stop_thread_timer(dev->tid);
289 Dmsg1(29, "open_dev: tape %d opened\n", dev->fd);
292 * Handle opening of File Archive (not a tape)
294 if (VolName == NULL || *VolName == 0) {
295 Mmsg(&dev->errmsg, _("Could not open file device %s. No Volume name given.\n"),
299 archive_name = get_pool_memory(PM_FNAME);
300 pm_strcpy(&archive_name, dev->dev_name);
301 if (archive_name[strlen(archive_name)] != '/') {
302 pm_strcat(&archive_name, "/");
304 pm_strcat(&archive_name, VolName);
305 Dmsg1(29, "open_dev: device is disk %s\n", archive_name);
306 if (mode == OPEN_READ_WRITE) {
307 dev->mode = O_CREAT | O_RDWR | O_BINARY;
308 } else if (mode == OPEN_READ_ONLY) {
309 dev->mode = O_RDONLY | O_BINARY;
310 } else if (mode == OPEN_WRITE_ONLY) {
311 dev->mode = O_WRONLY | O_BINARY;
313 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
315 /* If creating file, give 0640 permissions */
316 if ((dev->fd = open(archive_name, dev->mode, 0640)) < 0) {
317 dev->dev_errno = errno;
318 Mmsg2(&dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name, strerror(dev->dev_errno));
319 Emsg0(M_FATAL, 0, dev->errmsg);
322 dev->state |= ST_OPENED;
324 update_pos_dev(dev); /* update position */
326 Dmsg1(29, "open_dev: disk fd=%d opened\n", dev->fd);
327 free_pool_memory(archive_name);
334 int _rewind_dev(char *file, int line, DEVICE *dev)
336 Dmsg2(100, "rewind_dev called from %s:%d\n", file, line);
337 return rewind_dev(dev);
344 * Returns: 1 on success
347 int rewind_dev(DEVICE *dev)
352 Dmsg1(29, "rewind_dev %s\n", dev->dev_name);
354 dev->dev_errno = EBADF;
355 Mmsg1(&dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
357 Emsg0(M_FATAL, 0, dev->errmsg);
360 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
361 dev->block_num = dev->file = 0;
363 if (dev->state & ST_TAPE) {
364 mt_com.mt_op = MTREW;
366 /* If we get an I/O error on rewind, it is probably because
367 * the drive is actually busy. We loop for (about 5 minutes)
368 * retrying every 5 seconds.
370 for (i=dev->max_rewind_wait; ; i -= 5) {
371 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
372 if (i == dev->max_rewind_wait) {
373 Dmsg1(200, "Rewind error, %s. retrying ...\n", strerror(errno));
375 clrerror_dev(dev, MTREW);
376 if (dev->dev_errno == EIO && i > 0) {
377 Dmsg0(200, "Sleeping 5 seconds.\n");
381 Mmsg2(&dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
382 dev->dev_name, strerror(dev->dev_errno));
387 } else if (dev->state & ST_FILE) {
388 if (lseek(dev->fd, (off_t)0, SEEK_SET) < 0) {
389 dev->dev_errno = errno;
390 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
391 dev->dev_name, strerror(dev->dev_errno));
399 * Position device to end of medium (end of data)
400 * Returns: 1 on succes
407 struct mtget mt_stat;
411 Dmsg0(29, "eod_dev\n");
412 if (dev->state & ST_EOT) {
415 dev->state &= ~(ST_EOF); /* remove EOF flags */
416 dev->block_num = dev->file = 0;
418 if (dev->state & (ST_FIFO | ST_PROG)) {
421 if (!(dev->state & ST_TAPE)) {
422 pos = lseek(dev->fd, (off_t)0, SEEK_END);
423 // Dmsg1(100, "====== Seek to %lld\n", pos);
426 dev->state |= ST_EOT;
429 dev->dev_errno = errno;
430 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
431 dev->dev_name, strerror(dev->dev_errno));
436 if (dev_cap(dev, CAP_FASTFSF) && !dev_cap(dev, CAP_EOM)) {
437 struct mtget mt_stat;
438 Dmsg0(100,"Using FAST FSF for EOM\n");
439 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) == 0 && mt_stat.mt_fileno <= 0) {
440 if (!rewind_dev(dev)) {
444 mt_com.mt_op = MTFSF;
446 * ***FIXEM*** fix code to handle case that INT16_MAX is
449 mt_com.mt_count = INT16_MAX; /* use big positive number */
450 if (mt_com.mt_count < 0) {
451 mt_com.mt_count = INT16_MAX; /* brain damaged system */
455 if (dev_cap(dev, CAP_EOM)) {
456 Dmsg0(100,"Using EOM for EOM\n");
457 mt_com.mt_op = MTEOM;
460 if (dev_cap(dev, CAP_FASTFSF) || dev_cap(dev, CAP_EOM)) {
461 if ((stat=ioctl(dev->fd, MTIOCTOP, (char *)&mt_com)) < 0) {
462 Dmsg1(50, "ioctl error: %s\n", strerror(dev->dev_errno));
463 clrerror_dev(dev, mt_com.mt_op);
465 Mmsg2(&dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
466 dev->dev_name, strerror(dev->dev_errno));
470 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
471 dev->dev_errno = errno;
472 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
473 dev->dev_name, strerror(dev->dev_errno));
476 Dmsg2(100, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
477 dev->file = mt_stat.mt_fileno;
480 * Rewind then use FSF until EOT reached
486 if (!rewind_dev(dev)) {
490 * Move file by file to the end of the tape
493 for (file_num=dev->file; !(dev->state & ST_EOT); file_num++) {
494 Dmsg0(200, "eod_dev: doing fsf 1\n");
495 if (!fsf_dev(dev, 1)) {
496 Dmsg0(200, "fsf_dev error.\n");
500 * Avoid infinite loop. ***FIXME*** possibly add code
501 * to set EOD or to turn off CAP_FASTFSF if on.
503 if (file_num == (int)dev->file) {
504 struct mtget mt_stat;
505 Dmsg1(100, "fsf_dev did not advance from file %d\n", file_num);
506 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) == 0 &&
507 mt_stat.mt_fileno >= 0) {
508 Dmsg2(000, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
509 dev->file = mt_stat.mt_fileno;
512 break; /* we are not progressing, bail out */
517 * Some drivers leave us after second EOF when doing
518 * MTEOM, so we must backup so that appending overwrites
521 if (dev_cap(dev, CAP_BSFATEOM)) {
522 struct mtget mt_stat;
523 /* Backup over EOF */
524 stat = bsf_dev(dev, 1);
525 /* If BSF worked and fileno is known (not -1), set file */
526 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) == 0 && mt_stat.mt_fileno >= 0) {
527 Dmsg2(100, "Adjust file from %d to %d\n", dev->file , mt_stat.mt_fileno);
528 dev->file = mt_stat.mt_fileno;
530 dev->file++; /* wing it -- not correct on all OSes */
533 update_pos_dev(dev); /* update position */
536 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
541 * Set the position of the device -- only for files
542 * For other devices, there is no generic way to do it.
543 * Returns: 1 on succes
546 int update_pos_dev(DEVICE *dev)
552 dev->dev_errno = EBADF;
553 Mmsg0(&dev->errmsg, _("Bad device call. Archive not open\n"));
554 Emsg0(M_FATAL, 0, dev->errmsg);
558 /* Find out where we are */
559 if (dev->state & ST_FILE) {
562 pos = lseek(dev->fd, (off_t)0, SEEK_CUR);
564 Pmsg1(000, "Seek error: ERR=%s\n", strerror(dev->dev_errno));
565 dev->dev_errno = errno;
566 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
567 dev->dev_name, strerror(dev->dev_errno));
570 dev->file_addr = pos;
579 * Return the status of the device. This was meant
580 * to be a generic routine. Unfortunately, it doesn't
581 * seem possible (at least I do not know how to do it
582 * currently), which means that for the moment, this
583 * routine has very little value.
587 uint32_t status_dev(DEVICE *dev)
589 struct mtget mt_stat;
592 if (dev->state & (ST_EOT | ST_WEOT)) {
596 if (dev->state & ST_EOF) {
600 if (dev->state & ST_TAPE) {
602 Dmsg0(-20," Bacula status:");
603 Dmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
604 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
605 dev->dev_errno = errno;
606 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
607 dev->dev_name, strerror(dev->dev_errno));
610 Dmsg0(-20, " Device status:");
612 #if defined(HAVE_LINUX_OS)
613 if (GMT_EOF(mt_stat.mt_gstat)) {
617 if (GMT_BOT(mt_stat.mt_gstat)) {
621 if (GMT_EOT(mt_stat.mt_gstat)) {
625 if (GMT_SM(mt_stat.mt_gstat)) {
629 if (GMT_EOD(mt_stat.mt_gstat)) {
633 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
635 Dmsg0(-20, " WR_PROT");
637 if (GMT_ONLINE(mt_stat.mt_gstat)) {
639 Dmsg0(-20, " ONLINE");
641 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
643 Dmsg0(-20, " DR_OPEN");
645 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
646 stat |= BMT_IM_REP_EN;
647 Dmsg0(-20, " IM_REP_EN");
649 #endif /* !SunOS && !OSF */
650 Dmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
652 stat |= BMT_ONLINE | BMT_BOT;
659 * Load medium in device
660 * Returns: 1 on success
663 int load_dev(DEVICE *dev)
670 dev->dev_errno = EBADF;
671 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
672 Emsg0(M_FATAL, 0, dev->errmsg);
675 if (!(dev->state & ST_TAPE)) {
679 Dmsg0(200, "stored: MTLOAD command not available\n");
680 dev->dev_errno = ENOTTY; /* function not available */
681 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
682 dev->dev_name, strerror(dev->dev_errno)); return 0;
686 dev->block_num = dev->file = 0;
688 mt_com.mt_op = MTLOAD;
690 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
691 dev->dev_errno = errno;
692 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
693 dev->dev_name, strerror(dev->dev_errno)); return 0;
700 * Rewind device and put it offline
701 * Returns: 1 on success
704 int offline_dev(DEVICE *dev)
709 dev->dev_errno = EBADF;
710 Mmsg0(&dev->errmsg, _("Bad call to offline_dev. Archive not open\n"));
711 Emsg0(M_FATAL, 0, dev->errmsg);
714 if (!(dev->state & ST_TAPE)) {
718 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT|ST_EOF|ST_WEOT); /* remove EOF/EOT flags */
719 dev->block_num = dev->file = 0;
722 mt_com.mt_op = MTUNLOCK;
724 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
726 mt_com.mt_op = MTOFFL;
728 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
729 dev->dev_errno = errno;
730 Mmsg2(&dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
731 dev->dev_name, strerror(dev->dev_errno));
734 Dmsg1(100, "Offlined device %s\n", dev->dev_name);
738 int offline_or_rewind_dev(DEVICE *dev)
740 if (dev_cap(dev, CAP_OFFLINEUNMOUNT)) {
741 return offline_dev(dev);
744 * Note, this rewind probably should not be here (it wasn't
745 * in prior versions of Bacula), but on FreeBSD, this is
746 * needed in the case the tape was "frozen" due to an error
747 * such as backspacing after writing and EOF. If it is not
748 * done, all future references to the drive get and I/O error.
750 return rewind_dev(dev);
755 * Foward space a file
756 * Returns: 1 on success
760 fsf_dev(DEVICE *dev, int num)
762 struct mtget mt_stat;
767 dev->dev_errno = EBADF;
768 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
769 Emsg0(M_FATAL, 0, dev->errmsg);
773 if (!(dev->state & ST_TAPE)) {
776 if (dev->state & ST_EOT) {
778 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
781 if (dev->state & ST_EOF) {
782 Dmsg0(200, "ST_EOF set on entry to FSF\n");
785 Dmsg0(29, "fsf_dev\n");
788 * If Fast forward space file is set, then we
789 * use MTFSF to forward space and MTIOCGET
790 * to get the file position. We assume that
791 * the SCSI driver will ensure that we do not
792 * forward space over the end of data mark.
794 if (dev_cap(dev, CAP_FSF) && dev_cap(dev, CAP_FASTFSF)) {
795 mt_com.mt_op = MTFSF;
796 mt_com.mt_count = num;
797 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
798 if (stat < 0 || ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
799 dev->state |= ST_EOT;
800 Dmsg0(200, "Set ST_EOT\n");
801 clrerror_dev(dev, MTFSF);
802 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
803 dev->dev_name, strerror(dev->dev_errno));
804 Dmsg1(200, "%s", dev->errmsg);
807 Dmsg2(200, "fsf file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
808 dev->file = mt_stat.mt_fileno;
809 dev->state |= ST_EOF; /* just read EOF */
814 * Here if CAP_FSF is set, and virtually all drives
815 * these days support it, we read a record, then forward
816 * space one file. Using this procedure, which is slow,
817 * is the only way we can be sure that we don't read
818 * two consecutive EOF marks, which means End of Data.
820 } else if (dev_cap(dev, CAP_FSF)) {
823 Dmsg0(200, "FSF has cap_fsf\n");
824 if (dev->max_block_size == 0) {
825 rbuf_len = DEFAULT_BLOCK_SIZE;
827 rbuf_len = dev->max_block_size;
829 rbuf = get_memory(rbuf_len);
830 mt_com.mt_op = MTFSF;
832 while (num-- && !(dev->state & ST_EOT)) {
833 Dmsg0(200, "Doing read before fsf\n");
834 if ((stat = read(dev->fd, (char *)rbuf, rbuf_len)) < 0) {
835 if (errno == ENOMEM) { /* tape record exceeds buf len */
836 stat = rbuf_len; /* This is OK */
838 dev->state |= ST_EOT;
839 clrerror_dev(dev, -1);
840 Dmsg2(200, "Set ST_EOT read errno=%d. ERR=%s\n", dev->dev_errno,
841 strerror(dev->dev_errno));
842 Mmsg2(&dev->errmsg, _("read error on %s. ERR=%s.\n"),
843 dev->dev_name, strerror(dev->dev_errno));
844 Dmsg1(200, "%s", dev->errmsg);
848 if (stat == 0) { /* EOF */
850 Dmsg1(200, "End of File mark from read. File=%d\n", dev->file+1);
851 /* Two reads of zero means end of tape */
852 if (dev->state & ST_EOF) {
853 dev->state |= ST_EOT;
854 Dmsg0(200, "Set ST_EOT\n");
857 dev->state |= ST_EOF;
862 } else { /* Got data */
863 dev->state &= ~(ST_EOF|ST_EOT);
866 Dmsg0(200, "Doing MTFSF\n");
867 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
868 if (stat < 0) { /* error => EOT */
869 dev->state |= ST_EOT;
870 Dmsg0(200, "Set ST_EOT\n");
871 clrerror_dev(dev, MTFSF);
872 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
873 dev->dev_name, strerror(dev->dev_errno));
874 Dmsg0(200, "Got < 0 for MTFSF\n");
875 Dmsg1(200, "%s", dev->errmsg);
877 dev->state |= ST_EOF; /* just read EOF */
885 * No FSF, so use FSR to simulate it
888 Dmsg0(200, "Doing FSR for FSF\n");
889 while (num-- && !(dev->state & ST_EOT)) {
890 fsr_dev(dev, INT32_MAX); /* returns -1 on EOF or EOT */
892 if (dev->state & ST_EOT) {
894 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
901 Dmsg1(200, "Return %d from FSF\n", stat);
902 if (dev->state & ST_EOF)
903 Dmsg0(200, "ST_EOF set on exit FSF\n");
904 if (dev->state & ST_EOT)
905 Dmsg0(200, "ST_EOT set on exit FSF\n");
906 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
907 return stat == 0 ? 1 : 0;
911 * Backward space a file
912 * Returns: 0 on failure
916 bsf_dev(DEVICE *dev, int num)
922 dev->dev_errno = EBADF;
923 Mmsg0(&dev->errmsg, _("Bad call to bsf_dev. Archive device not open\n"));
924 Emsg0(M_FATAL, 0, dev->errmsg);
928 if (!(dev_state(dev, ST_TAPE))) {
929 Mmsg1(&dev->errmsg, _("Device %s cannot BSF because it is not a tape.\n"),
933 Dmsg0(29, "bsf_dev\n");
934 dev->state &= ~(ST_EOT|ST_EOF);
937 mt_com.mt_op = MTBSF;
938 mt_com.mt_count = num;
939 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
941 clrerror_dev(dev, MTBSF);
942 Mmsg2(&dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
943 dev->dev_name, strerror(dev->dev_errno));
946 return stat == 0 ? 1 : 0;
951 * Foward space a record
952 * Returns: 0 on failure
956 fsr_dev(DEVICE *dev, int num)
962 dev->dev_errno = EBADF;
963 Mmsg0(&dev->errmsg, _("Bad call to fsr_dev. Archive not open\n"));
964 Emsg0(M_FATAL, 0, dev->errmsg);
968 if (!(dev_state(dev, ST_TAPE))) {
971 Dmsg0(29, "fsr_dev\n");
972 mt_com.mt_op = MTFSR;
973 mt_com.mt_count = num;
974 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
976 dev->state &= ~ST_EOF;
977 dev->block_num += num;
979 struct mtget mt_stat;
980 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) == 0 && mt_stat.mt_fileno >= 0) {
981 Dmsg4(100, "Adjust from %d:%d to %d:%d\n", dev->file,
982 dev->block_num, mt_stat.mt_fileno, mt_stat.mt_blkno);
983 dev->file = mt_stat.mt_fileno;
984 dev->block_num = mt_stat.mt_blkno;
986 if (dev->state & ST_EOF) {
987 dev->state |= ST_EOT;
989 dev->state |= ST_EOF; /* assume EOF */
995 clrerror_dev(dev, MTFSR);
996 Mmsg2(&dev->errmsg, _("ioctl MTFSR error on %s. ERR=%s.\n"),
997 dev->dev_name, strerror(dev->dev_errno));
1000 return stat == 0 ? 1 : 0;
1004 * Backward space a record
1005 * Returns: 0 on failure
1009 bsr_dev(DEVICE *dev, int num)
1015 dev->dev_errno = EBADF;
1016 Mmsg0(&dev->errmsg, _("Bad call to bsr_dev. Archive not open\n"));
1017 Emsg0(M_FATAL, 0, dev->errmsg);
1021 if (!(dev->state & ST_TAPE)) {
1025 if (!dev_cap(dev, CAP_BSR)) {
1026 Mmsg1(&dev->errmsg, _("ioctl MTBSR not permitted on %s.\n"),
1031 Dmsg0(29, "bsr_dev\n");
1032 dev->block_num -= num;
1033 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
1034 mt_com.mt_op = MTBSR;
1035 mt_com.mt_count = num;
1036 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1038 clrerror_dev(dev, MTBSR);
1039 Mmsg2(&dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
1040 dev->dev_name, strerror(dev->dev_errno));
1042 update_pos_dev(dev);
1043 return stat == 0 ? 1 : 0;
1047 * Reposition the device to file, block
1048 * Returns: 0 on failure
1052 reposition_dev(DEVICE *dev, uint32_t file, uint32_t block)
1055 dev->dev_errno = EBADF;
1056 Mmsg0(&dev->errmsg, _("Bad call to reposition_dev. Archive not open\n"));
1057 Emsg0(M_FATAL, 0, dev->errmsg);
1061 if (!(dev_state(dev, ST_TAPE))) {
1062 off_t pos = (((off_t)file)<<32) + block;
1063 Dmsg1(100, "===== lseek to %d\n", (int)pos);
1064 if (lseek(dev->fd, pos, SEEK_SET) == (off_t)-1) {
1065 dev->dev_errno = errno;
1066 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
1067 dev->dev_name, strerror(dev->dev_errno));
1071 dev->block_num = block;
1072 dev->file_addr = pos;
1075 Dmsg4(100, "reposition_dev from %u:%u to %u:%u\n",
1076 dev->file, dev->block_num, file, block);
1077 if (file < dev->file) {
1078 Dmsg0(100, "Rewind_dev\n");
1079 if (!rewind_dev(dev)) {
1083 if (file > dev->file) {
1084 Dmsg1(100, "fsf %d\n", file-dev->file);
1085 if (!fsf_dev(dev, file-dev->file)) {
1089 if (block < dev->block_num) {
1093 if (block > dev->block_num) {
1094 /* Ignore errors as Bacula can read to the correct block */
1095 Dmsg1(100, "fsr %d\n", block-dev->block_num);
1096 fsr_dev(dev, block-dev->block_num);
1104 * Write an end of file on the device
1105 * Returns: 0 on success
1106 * non-zero on failure
1109 weof_dev(DEVICE *dev, int num)
1115 dev->dev_errno = EBADF;
1116 Mmsg0(&dev->errmsg, _("Bad call to weof_dev. Archive drive not open\n"));
1117 Emsg0(M_FATAL, 0, dev->errmsg);
1121 if (!(dev_state(dev, ST_TAPE))) {
1124 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
1126 Dmsg0(29, "weof_dev\n");
1127 mt_com.mt_op = MTWEOF;
1128 mt_com.mt_count = num;
1129 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1134 clrerror_dev(dev, MTWEOF);
1136 Mmsg2(&dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
1137 dev->dev_name, strerror(dev->dev_errno));
1144 * Return string message with last error in English
1145 * Be careful not to call this routine from within dev.c
1146 * while editing an Mmsg(&) or you will end up in a recursive
1147 * loop creating a Segmentation Violation.
1150 strerror_dev(DEVICE *dev)
1157 * If implemented in system, clear the tape
1161 clrerror_dev(DEVICE *dev, int func)
1165 dev->dev_errno = errno; /* save errno */
1167 dev->VolCatInfo.VolCatErrors++;
1170 if (!(dev->state & ST_TAPE)) {
1173 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
1176 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
1180 dev->capabilities &= ~CAP_EOF; /* turn off feature */
1185 dev->capabilities &= ~CAP_EOM; /* turn off feature */
1190 dev->capabilities &= ~CAP_FSF; /* turn off feature */
1194 dev->capabilities &= ~CAP_BSF; /* turn off feature */
1198 dev->capabilities &= ~CAP_FSR; /* turn off feature */
1202 dev->capabilities &= ~CAP_BSR; /* turn off feature */
1209 dev->dev_errno = ENOSYS;
1210 Mmsg1(&dev->errmsg, _("This device does not support %s.\n"), msg);
1211 Emsg0(M_ERROR, 0, dev->errmsg);
1214 /* Found on Linux */
1218 mt_com.mt_op = MTIOCLRERR;
1219 mt_com.mt_count = 1;
1220 /* Clear any error condition on the tape */
1221 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1222 Dmsg0(200, "Did MTIOCLRERR\n");
1226 /* Typically on FreeBSD */
1229 /* Read and clear SCSI error status */
1230 union mterrstat mt_errstat;
1231 Dmsg2(200, "Doing MTIOCERRSTAT errno=%d ERR=%s\n", dev->dev_errno,
1232 strerror(dev->dev_errno));
1233 ioctl(dev->fd, MTIOCERRSTAT, (char *)&mt_errstat);
1239 * Flush buffer contents
1242 int flush_dev(DEVICE *dev)
1247 static void do_close(DEVICE *dev)
1250 Dmsg1(29, "really close_dev %s\n", dev->dev_name);
1254 /* Clean up device packet so it can be reused */
1256 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
1257 dev->file = dev->block_num = 0;
1259 dev->EndFile = dev->EndBlock = 0;
1260 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
1261 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
1263 stop_thread_timer(dev->tid);
1273 close_dev(DEVICE *dev)
1276 Mmsg0(&dev->errmsg, _("Bad call to close_dev. Archive not open\n"));
1277 Emsg0(M_FATAL, 0, dev->errmsg);
1280 if (dev->fd >= 0 && dev->use_count == 1) {
1282 } else if (dev->use_count > 0) {
1287 ASSERT(dev->use_count >= 0);
1292 * Used when unmounting the device, ignore use_count
1294 void force_close_dev(DEVICE *dev)
1297 Mmsg0(&dev->errmsg, _("Bad call to force_close_dev. Archive not open\n"));
1298 Emsg0(M_FATAL, 0, dev->errmsg);
1301 Dmsg1(29, "Force close_dev %s\n", dev->dev_name);
1305 ASSERT(dev->use_count >= 0);
1309 int truncate_dev(DEVICE *dev)
1311 if (dev->state & ST_TAPE) {
1314 if (ftruncate(dev->fd, 0) != 0) {
1315 Mmsg1(&dev->errmsg, _("Unable to truncate device. ERR=%s\n"), strerror(errno));
1322 dev_is_tape(DEVICE *dev)
1324 return (dev->state & ST_TAPE) ? 1 : 0;
1329 * return 1 if the device is read for write, and 0 otherwise
1330 * This is meant for checking at the end of a job to see
1331 * if we still have a tape (perhaps not if at end of tape
1332 * and the job is canceled).
1335 dev_can_write(DEVICE *dev)
1337 if ((dev->state & ST_OPENED) && (dev->state & ST_APPEND) &&
1338 (dev->state & ST_LABEL) && !(dev->state & ST_WEOT)) {
1346 dev_name(DEVICE *dev)
1348 return dev->dev_name;
1352 dev_vol_name(DEVICE *dev)
1354 return dev->VolCatInfo.VolCatName;
1357 uint32_t dev_block(DEVICE *dev)
1359 update_pos_dev(dev);
1360 return dev->block_num;
1363 uint32_t dev_file(DEVICE *dev)
1365 update_pos_dev(dev);
1370 * Free memory allocated for the device
1373 term_dev(DEVICE *dev)
1376 dev->dev_errno = EBADF;
1377 Mmsg0(&dev->errmsg, _("Bad call to term_dev. Archive not open\n"));
1378 Emsg0(M_FATAL, 0, dev->errmsg);
1382 Dmsg0(29, "term_dev\n");
1383 if (dev->dev_name) {
1384 free_memory(dev->dev_name);
1385 dev->dev_name = NULL;
1388 free_pool_memory(dev->errmsg);
1391 pthread_mutex_destroy(&dev->mutex);
1392 pthread_cond_destroy(&dev->wait);
1393 pthread_cond_destroy(&dev->wait_next_vol);
1394 if (dev->attached_dcrs) {
1395 delete dev->attached_dcrs;
1396 dev->attached_dcrs = NULL;
1398 if (dev->state & ST_MALLOC) {
1399 free_pool_memory((POOLMEM *)dev);
1404 * We attach a jcr to the device so that when
1405 * the Volume is full during writing, a
1406 * JobMedia record will be created for this
1409 void attach_jcr_to_device(DEVICE *dev, JCR *jcr)
1411 jcr->prev_dev = (JCR *)NULL;
1412 jcr->next_dev = dev->attached_jcrs;
1413 if (dev->attached_jcrs) {
1414 dev->attached_jcrs->prev_dev = jcr;
1416 dev->attached_jcrs = jcr;
1417 Dmsg1(100, "Attached Job %s\n", jcr->Job);
1420 void detach_jcr_from_device(DEVICE *dev, JCR *jcr)
1422 if (!jcr->prev_dev) {
1423 dev->attached_jcrs = jcr->next_dev;
1425 jcr->prev_dev->next_dev = jcr->next_dev;
1427 if (jcr->next_dev) {
1428 jcr->next_dev->prev_dev = jcr->prev_dev;
1430 jcr->next_dev = jcr->prev_dev = NULL;
1431 Dmsg1(100, "Detached Job %s\n", jcr->Job);
1434 JCR *next_attached_jcr(DEVICE *dev, JCR *jcr)
1436 if (jcr == (JCR *)NULL) {
1437 return dev->attached_jcrs;
1439 return jcr->next_dev;
1443 * This routine initializes the device wait timers
1445 void init_dev_wait_timers(DEVICE *dev)
1447 /* ******FIXME******* put these on config variables */
1448 dev->min_wait = 60 * 60;
1449 dev->max_wait = 24 * 60 * 60;
1450 dev->max_num_wait = 9; /* 5 waits =~ 1 day, then 1 day at a time */
1451 dev->wait_sec = dev->min_wait;
1452 dev->rem_wait_sec = dev->wait_sec;
1455 dev->BadVolName[0] = 0;
1459 * Returns: true if time doubled
1460 * false if max time expired
1462 bool double_dev_wait_time(DEVICE *dev)
1464 dev->wait_sec *= 2; /* double wait time */
1465 if (dev->wait_sec > dev->max_wait) { /* but not longer than maxtime */
1466 dev->wait_sec = dev->max_wait;
1469 dev->rem_wait_sec = dev->wait_sec;
1470 if (dev->num_wait >= dev->max_num_wait) {