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) 2000-2003 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 */
86 int dev_is_tape(DEVICE *dev);
87 void clrerror_dev(DEVICE *dev, int func);
88 int fsr_dev(DEVICE *dev, int num);
90 extern int debug_level;
93 * Allocate and initialize the DEVICE structure
94 * Note, if dev is non-NULL, it is already allocated,
95 * thus we neither allocate it nor free it. This allows
96 * the caller to put the packet in shared memory.
98 * Note, for a tape, the device->device_name is the device name
99 * (e.g. /dev/nst0), and for a file, the device name
100 * is the directory in which the file will be placed.
104 init_dev(DEVICE *dev, DEVRES *device)
110 /* Check that device is available */
111 if (stat(device->device_name, &statp) < 0) {
113 dev->dev_errno = errno;
115 Emsg2(M_FATAL, 0, "Unable to stat device %s : %s\n", device->device_name,
121 if (S_ISDIR(statp.st_mode)) {
123 } else if (S_ISCHR(statp.st_mode)) {
125 } else if (S_ISFIFO(statp.st_mode)) {
129 dev->dev_errno = ENODEV;
131 Emsg2(M_FATAL, 0, _("%s is an unknown device type. Must be tape or directory. st_mode=%x\n"),
132 dev_name, statp.st_mode);
136 dev = (DEVICE *)get_memory(sizeof(DEVICE));
137 memset(dev, 0, sizeof(DEVICE));
138 dev->state = ST_MALLOC;
140 memset(dev, 0, sizeof(DEVICE));
143 /* Copy user supplied device parameters from Resource */
144 dev->dev_name = get_memory(strlen(device->device_name)+1);
145 strcpy(dev->dev_name, device->device_name);
146 dev->capabilities = device->cap_bits;
147 dev->min_block_size = device->min_block_size;
148 dev->max_block_size = device->max_block_size;
149 dev->max_volume_size = device->max_volume_size;
150 dev->max_file_size = device->max_file_size;
151 dev->volume_capacity = device->volume_capacity;
152 dev->max_rewind_wait = device->max_rewind_wait;
153 dev->max_open_wait = device->max_open_wait;
154 dev->max_open_vols = device->max_open_vols;
155 dev->device = device;
158 dev->state |= ST_TAPE;
160 dev->state |= ST_FIFO;
161 dev->capabilities |= CAP_STREAM; /* set stream device */
163 dev->state |= ST_FILE;
166 if (dev->max_block_size > 1000000) {
167 Emsg3(M_ERROR, 0, _("Block size %u on device %s is too large, using default %u\n"),
168 dev->max_block_size, dev->dev_name, DEFAULT_BLOCK_SIZE);
169 dev->max_block_size = 0;
171 if (dev->max_block_size % TAPE_BSIZE != 0) {
172 Emsg2(M_WARNING, 0, _("Max block size %u not multiple of device %s block size.\n"),
173 dev->max_block_size, dev->dev_name);
176 dev->errmsg = get_pool_memory(PM_EMSG);
179 if ((errstat = pthread_mutex_init(&dev->mutex, NULL)) != 0) {
180 dev->dev_errno = errstat;
181 Mmsg1(&dev->errmsg, _("Unable to init mutex: ERR=%s\n"), strerror(errstat));
182 Emsg0(M_FATAL, 0, dev->errmsg);
184 if ((errstat = pthread_cond_init(&dev->wait, NULL)) != 0) {
185 dev->dev_errno = errstat;
186 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
187 Emsg0(M_FATAL, 0, dev->errmsg);
189 if ((errstat = pthread_cond_init(&dev->wait_next_vol, NULL)) != 0) {
190 dev->dev_errno = errstat;
191 Mmsg1(&dev->errmsg, _("Unable to init cond variable: ERR=%s\n"), strerror(errstat));
192 Emsg0(M_FATAL, 0, dev->errmsg);
195 Dmsg2(29, "init_dev: tape=%d dev_name=%s\n", dev_is_tape(dev), dev->dev_name);
199 /* Open the device with the operating system and
200 * initialize buffer pointers.
202 * Note, for a tape, the VolName is the name we give to the
203 * volume (not really used here), but for a file, the
204 * VolName represents the name of the file to be created/opened.
205 * In the case of a file, the full name is the device name
206 * (archive_name) with the VolName concatenated.
209 open_dev(DEVICE *dev, char *VolName, int mode)
211 POOLMEM *archive_name;
213 if (dev->state & ST_OPENED) {
215 * *****FIXME***** how to handle two threads wanting
216 * different volumes mounted???? E.g. one is waiting
217 * for the next volume to be mounted, and a new job
218 * starts and snatches up the device.
220 if (VolName && strcmp(dev->VolCatInfo.VolCatName, VolName) != 0) {
224 Mmsg2(&dev->errmsg, _("WARNING!!!! device %s opened %d times!!!\n"),
225 dev->dev_name, dev->use_count);
226 Emsg1(M_WARNING, 0, "%s", dev->errmsg);
230 strcpy(dev->VolCatInfo.VolCatName, VolName);
233 Dmsg3(29, "open_dev: tape=%d dev_name=%s vol=%s\n", dev_is_tape(dev),
234 dev->dev_name, dev->VolCatInfo.VolCatName);
235 dev->state &= ~(ST_LABEL|ST_APPEND|ST_READ|ST_EOT|ST_WEOT|ST_EOF);
236 if (dev->state & (ST_TAPE|ST_FIFO)) {
238 Dmsg0(29, "open_dev: device is tape\n");
239 if (mode == OPEN_READ_WRITE) {
240 dev->mode = O_RDWR | O_BINARY;
241 } else if (mode == OPEN_READ_ONLY) {
242 dev->mode = O_RDONLY | O_BINARY;
243 } else if (mode == OPEN_WRITE_ONLY) {
244 dev->mode = O_WRONLY | O_BINARY;
246 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
248 timeout = dev->max_open_wait;
250 if (dev->state & ST_FIFO && timeout) {
252 dev->tid = start_thread_timer(pthread_self(), timeout);
254 /* If busy retry each second for max_open_wait seconds */
255 while ((dev->fd = open(dev->dev_name, dev->mode, MODE_RW)) < 0) {
256 if (errno == EAGAIN) {
259 if (errno == EBUSY && timeout-- > 0) {
260 Dmsg2(100, "Device %s busy. ERR=%s\n", dev->dev_name, strerror(errno));
264 dev->dev_errno = errno;
265 Mmsg2(&dev->errmsg, _("stored: unable to open device %s: ERR=%s\n"),
266 dev->dev_name, strerror(dev->dev_errno));
267 /* Stop any open timer we set */
269 stop_thread_timer(dev->tid);
272 Emsg0(M_FATAL, 0, dev->errmsg);
277 dev->state |= ST_OPENED;
279 update_pos_dev(dev); /* update position */
281 /* Stop any open() timer we started */
283 stop_thread_timer(dev->tid);
286 Dmsg1(29, "open_dev: tape %d opened\n", dev->fd);
289 * Handle opening of File Archive (not a tape)
291 archive_name = get_pool_memory(PM_FNAME);
292 pm_strcpy(&archive_name, dev->dev_name);
293 if (archive_name[strlen(archive_name)] != '/') {
294 pm_strcat(&archive_name, "/");
296 pm_strcat(&archive_name, VolName);
297 Dmsg1(29, "open_dev: device is disk %s\n", archive_name);
298 if (mode == OPEN_READ_WRITE) {
299 dev->mode = O_CREAT | O_RDWR | O_BINARY;
300 } else if (mode == OPEN_READ_ONLY) {
301 dev->mode = O_RDONLY | O_BINARY;
302 } else if (mode == OPEN_WRITE_ONLY) {
303 dev->mode = O_WRONLY | O_BINARY;
305 Emsg0(M_ABORT, 0, _("Illegal mode given to open_dev.\n"));
307 /* If creating file, give 0640 permissions */
308 if ((dev->fd = open(archive_name, dev->mode, 0640)) < 0) {
309 dev->dev_errno = errno;
310 Mmsg2(&dev->errmsg, _("Could not open: %s, ERR=%s\n"), archive_name, strerror(dev->dev_errno));
311 Emsg0(M_FATAL, 0, dev->errmsg);
314 dev->state |= ST_OPENED;
316 update_pos_dev(dev); /* update position */
318 Dmsg1(29, "open_dev: disk fd=%d opened\n", dev->fd);
319 free_pool_memory(archive_name);
326 * Returns: 1 on success
329 int rewind_dev(DEVICE *dev)
334 Dmsg0(29, "rewind_dev\n");
336 dev->dev_errno = EBADF;
337 Mmsg1(&dev->errmsg, _("Bad call to rewind_dev. Device %s not open\n"),
339 Emsg0(M_FATAL, 0, dev->errmsg);
342 dev->state &= ~(ST_APPEND|ST_READ|ST_EOT | ST_EOF | ST_WEOT); /* remove EOF/EOT flags */
343 dev->block_num = dev->file = 0;
345 if (dev->state & ST_TAPE) {
346 mt_com.mt_op = MTREW;
348 /* If we get an I/O error on rewind, it is probably because
349 * the drive is actually busy. We loop for (about 5 minutes)
350 * retrying every 5 seconds.
352 for (i=dev->max_rewind_wait; ; i -= 5) {
353 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
354 if (i == dev->max_rewind_wait) {
355 Dmsg1(200, "Rewind error, %s. retrying ...\n", strerror(errno));
357 clrerror_dev(dev, MTREW);
358 if (dev->dev_errno == EIO && i > 0) {
359 Dmsg0(200, "Sleeping 5 seconds.\n");
363 Mmsg2(&dev->errmsg, _("Rewind error on %s. ERR=%s.\n"),
364 dev->dev_name, strerror(dev->dev_errno));
369 } else if (dev->state & ST_FILE) {
370 if (lseek(dev->fd, (off_t)0, SEEK_SET) < 0) {
371 dev->dev_errno = errno;
372 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
373 dev->dev_name, strerror(dev->dev_errno));
381 * Position device to end of medium (end of data)
382 * Returns: 1 on succes
389 struct mtget mt_stat;
393 Dmsg0(29, "eod_dev\n");
394 if (dev->state & ST_EOT) {
397 dev->state &= ~(ST_EOF); /* remove EOF flags */
398 dev->block_num = dev->file = 0;
400 if (dev->state & (ST_FIFO | ST_PROG)) {
403 if (!(dev->state & ST_TAPE)) {
404 pos = lseek(dev->fd, (off_t)0, SEEK_END);
405 // Dmsg1(000, "====== Seek to %lld\n", pos);
408 dev->state |= ST_EOT;
413 if (dev_cap(dev, CAP_EOM)) {
414 mt_com.mt_op = MTEOM;
416 if ((stat=ioctl(dev->fd, MTIOCTOP, (char *)&mt_com)) < 0) {
417 Dmsg1(50, "ioctl error: %s\n", strerror(dev->dev_errno));
418 clrerror_dev(dev, mt_com.mt_op);
420 Mmsg2(&dev->errmsg, _("ioctl MTEOM error on %s. ERR=%s.\n"),
421 dev->dev_name, strerror(dev->dev_errno));
424 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
425 dev->dev_errno = errno;
426 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
427 dev->dev_name, strerror(dev->dev_errno));
430 Dmsg2(200, "EOD file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
431 dev->file = mt_stat.mt_fileno;
434 * Rewind then use FSF until EOT reached
437 if (!rewind_dev(dev)) {
440 while (!(dev->state & ST_EOT)) {
441 Dmsg0(200, "Do fsf 1\n");
442 if (!fsf_dev(dev, 1)) {
443 Dmsg0(200, "fsf_dev error.\n");
449 * Some drivers leave us after second EOF when doing
450 * MTEOM, so we must backup so that appending overwrites
453 if (dev_cap(dev, CAP_BSFATEOM)) {
454 stat = (bsf_dev(dev, 1) == 0);
455 dev->file++; /* keep same file */
457 update_pos_dev(dev); /* update position */
460 Dmsg1(200, "EOD dev->file=%d\n", dev->file);
465 * Set the position of the device -- only for files
466 * For other devices, there is no generic way to do it.
467 * Returns: 1 on succes
470 int update_pos_dev(DEVICE *dev)
476 dev->dev_errno = EBADF;
477 Mmsg0(&dev->errmsg, _("Bad device call. Archive not open\n"));
478 Emsg0(M_FATAL, 0, dev->errmsg);
482 /* Find out where we are */
483 if (dev->state & ST_FILE) {
486 pos = lseek(dev->fd, (off_t)0, SEEK_CUR);
488 Pmsg1(000, "Seek error: ERR=%s\n", strerror(dev->dev_errno));
489 dev->dev_errno = errno;
490 Mmsg2(&dev->errmsg, _("lseek error on %s. ERR=%s.\n"),
491 dev->dev_name, strerror(dev->dev_errno));
494 dev->file_addr = pos;
503 * Return the status of the device. This was meant
504 * to be a generic routine. Unfortunately, it doesn't
505 * seem possible (at least I do not know how to do it
506 * currently), which means that for the moment, this
507 * routine has very little value.
509 * Returns: 1 on success
513 status_dev(DEVICE *dev, uint32_t *status)
515 struct mtget mt_stat;
518 if (dev->state & (ST_EOT | ST_WEOT)) {
522 if (dev->state & ST_EOF) {
526 if (dev->state & ST_TAPE) {
528 Dmsg0(-20," Driver status:");
529 Dmsg2(-20," file=%d block=%d\n", dev->file, dev->block_num);
530 if (ioctl(dev->fd, MTIOCGET, (char *)&mt_stat) < 0) {
531 dev->dev_errno = errno;
532 Mmsg2(&dev->errmsg, _("ioctl MTIOCGET error on %s. ERR=%s.\n"),
533 dev->dev_name, strerror(dev->dev_errno));
536 Dmsg0(-20, " Device status:");
538 #if defined(HAVE_LINUX_OS)
539 if (GMT_EOF(mt_stat.mt_gstat)) {
543 if (GMT_BOT(mt_stat.mt_gstat)) {
547 if (GMT_EOT(mt_stat.mt_gstat)) {
551 if (GMT_SM(mt_stat.mt_gstat)) {
555 if (GMT_EOD(mt_stat.mt_gstat)) {
559 if (GMT_WR_PROT(mt_stat.mt_gstat)) {
561 Dmsg0(-20, " WR_PROT");
563 if (GMT_ONLINE(mt_stat.mt_gstat)) {
565 Dmsg0(-20, " ONLINE");
567 if (GMT_DR_OPEN(mt_stat.mt_gstat)) {
569 Dmsg0(-20, " DR_OPEN");
571 if (GMT_IM_REP_EN(mt_stat.mt_gstat)) {
572 stat |= MT_IM_REP_EN;
573 Dmsg0(-20, " IM_REP_EN");
575 #endif /* !SunOS && !OSF */
576 Dmsg2(-20, " file=%d block=%d\n", mt_stat.mt_fileno, mt_stat.mt_blkno);
578 stat |= MT_ONLINE | MT_BOT;
586 * Load medium in device
587 * Returns: 1 on success
590 int load_dev(DEVICE *dev)
597 dev->dev_errno = EBADF;
598 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
599 Emsg0(M_FATAL, 0, dev->errmsg);
602 if (!(dev->state & ST_TAPE)) {
606 Dmsg0(200, "stored: MTLOAD command not available\n");
607 dev->dev_errno = ENOTTY; /* function not available */
608 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
609 dev->dev_name, strerror(dev->dev_errno)); return 0;
613 dev->block_num = dev->file = 0;
615 mt_com.mt_op = MTLOAD;
617 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
618 dev->dev_errno = errno;
619 Mmsg2(&dev->errmsg, _("ioctl MTLOAD error on %s. ERR=%s.\n"),
620 dev->dev_name, strerror(dev->dev_errno)); return 0;
627 * Rewind device and put it offline
628 * Returns: 1 on success
631 int offline_dev(DEVICE *dev)
636 dev->dev_errno = EBADF;
637 Mmsg0(&dev->errmsg, _("Bad call to load_dev. Archive not open\n"));
638 Emsg0(M_FATAL, 0, dev->errmsg);
641 if (!(dev->state & ST_TAPE)) {
645 dev->block_num = dev->file = 0;
648 mt_com.mt_op = MTUNLOCK;
650 ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
652 mt_com.mt_op = MTOFFL;
654 if (ioctl(dev->fd, MTIOCTOP, (char *)&mt_com) < 0) {
655 dev->dev_errno = errno;
656 Mmsg2(&dev->errmsg, _("ioctl MTOFFL error on %s. ERR=%s.\n"),
657 dev->dev_name, strerror(dev->dev_errno));
660 Dmsg1(100, "Offlined device %s\n", dev->dev_name);
666 * Foward space a file
667 * Returns: 1 on success
671 fsf_dev(DEVICE *dev, int num)
677 dev->dev_errno = EBADF;
678 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
679 Emsg0(M_FATAL, 0, dev->errmsg);
683 if (!(dev->state & ST_TAPE)) {
686 if (dev->state & ST_EOT) {
688 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
691 if (dev->state & ST_EOF) {
692 Dmsg0(200, "ST_EOF set on entry to FSF\n");
694 if (dev->state & ST_EOT) {
695 Dmsg0(200, "ST_EOT set on entry to FSF\n");
698 Dmsg0(29, "fsf_dev\n");
700 if (dev_cap(dev, CAP_FSF)) {
703 Dmsg0(200, "FSF has cap_fsf\n");
704 if (dev->max_block_size == 0) {
705 rbuf_len = DEFAULT_BLOCK_SIZE;
707 rbuf_len = dev->max_block_size;
709 rbuf = get_memory(rbuf_len);
710 mt_com.mt_op = MTFSF;
712 while (num-- && !(dev->state & ST_EOT)) {
713 Dmsg0(200, "Doing read before fsf\n");
714 if ((stat = read(dev->fd, (char *)rbuf, rbuf_len)) < 0) {
715 if (errno == ENOMEM) { /* tape record exceeds buf len */
716 stat = rbuf_len; /* This is OK */
718 dev->state |= ST_EOT;
719 clrerror_dev(dev, -1);
720 Dmsg2(200, "Set ST_EOT read errno=%d. ERR=%s\n", dev->dev_errno,
721 strerror(dev->dev_errno));
722 Mmsg2(&dev->errmsg, _("read error on %s. ERR=%s.\n"),
723 dev->dev_name, strerror(dev->dev_errno));
724 Dmsg1(200, "%s", dev->errmsg);
728 if (stat == 0) { /* EOF */
730 Dmsg1(200, "End of File mark from read. File=%d\n", dev->file+1);
731 /* Two reads of zero means end of tape */
732 if (dev->state & ST_EOF) {
733 dev->state |= ST_EOT;
734 Dmsg0(200, "Set ST_EOT\n");
737 dev->state |= ST_EOF;
742 } else { /* Got data */
743 dev->state &= ~(ST_EOF|ST_EOT);
746 Dmsg0(200, "Doing MT_FSF\n");
747 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
748 if (stat < 0) { /* error => EOT */
749 dev->state |= ST_EOT;
750 Dmsg0(200, "Set ST_EOT\n");
751 clrerror_dev(dev, MTFSF);
752 Mmsg2(&dev->errmsg, _("ioctl MTFSF error on %s. ERR=%s.\n"),
753 dev->dev_name, strerror(dev->dev_errno));
754 Dmsg0(200, "Got < 0 for MT_FSF\n");
755 Dmsg1(200, "%s", dev->errmsg);
757 dev->state |= ST_EOF; /* just read EOF */
765 * No FSF, so use FSR to simulate it
768 Dmsg0(200, "Doing FSR for FSF\n");
769 while (num-- && !(dev->state & ST_EOT)) {
770 fsr_dev(dev, INT32_MAX); /* returns -1 on EOF or EOT */
772 if (dev->state & ST_EOT) {
774 Mmsg1(&dev->errmsg, _("Device %s at End of Tape.\n"), dev->dev_name);
781 Dmsg1(200, "Return %d from FSF\n", stat);
782 if (dev->state & ST_EOF)
783 Dmsg0(200, "ST_EOF set on exit FSF\n");
784 if (dev->state & ST_EOT)
785 Dmsg0(200, "ST_EOT set on exit FSF\n");
786 Dmsg1(200, "Return from FSF file=%d\n", dev->file);
787 return stat == 0 ? 1 : 0;
791 * Backward space a file
794 bsf_dev(DEVICE *dev, int num)
800 dev->dev_errno = EBADF;
801 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
802 Emsg0(M_FATAL, 0, dev->errmsg);
806 if (!(dev->state & ST_TAPE)) {
809 Dmsg0(29, "bsf_dev\n");
810 dev->state &= ~(ST_EOT|ST_EOF);
813 mt_com.mt_op = MTBSF;
814 mt_com.mt_count = num;
815 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
817 clrerror_dev(dev, MTBSF);
818 Mmsg2(&dev->errmsg, _("ioctl MTBSF error on %s. ERR=%s.\n"),
819 dev->dev_name, strerror(dev->dev_errno));
827 * Foward space a record
830 fsr_dev(DEVICE *dev, int num)
836 dev->dev_errno = EBADF;
837 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
838 Emsg0(M_FATAL, 0, dev->errmsg);
842 if (!(dev->state & ST_TAPE)) {
845 Dmsg0(29, "fsr_dev\n");
846 dev->block_num += num;
847 mt_com.mt_op = MTFSR;
848 mt_com.mt_count = num;
849 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
851 dev->state &= ~ST_EOF;
853 if (dev->state & ST_EOF) {
854 dev->state |= ST_EOT;
856 dev->state |= ST_EOF; /* assume EOF */
860 clrerror_dev(dev, MTFSR);
861 Mmsg2(&dev->errmsg, _("ioctl MTFSR error on %s. ERR=%s.\n"),
862 dev->dev_name, strerror(dev->dev_errno));
869 * Backward space a record
870 * Returns: 0 on success
874 bsr_dev(DEVICE *dev, int num)
880 dev->dev_errno = EBADF;
881 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
882 Emsg0(M_FATAL, 0, dev->errmsg);
886 if (!(dev->state & ST_TAPE)) {
889 Dmsg0(29, "bsr_dev\n");
890 dev->block_num -= num;
891 dev->state &= ~(ST_EOF|ST_EOT|ST_EOF);
892 mt_com.mt_op = MTBSR;
893 mt_com.mt_count = num;
894 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
896 clrerror_dev(dev, MTBSR);
897 Mmsg2(&dev->errmsg, _("ioctl MTBSR error on %s. ERR=%s.\n"),
898 dev->dev_name, strerror(dev->dev_errno));
907 * Write an end of file on the device
908 * Returns: 0 on success
909 * non-zero on failure
912 weof_dev(DEVICE *dev, int num)
918 dev->dev_errno = EBADF;
919 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
920 Emsg0(M_FATAL, 0, dev->errmsg);
924 if (!(dev->state & ST_TAPE)) {
927 dev->state &= ~(ST_EOT | ST_EOF); /* remove EOF/EOT flags */
929 Dmsg0(29, "weof_dev\n");
930 mt_com.mt_op = MTWEOF;
931 mt_com.mt_count = num;
932 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
937 clrerror_dev(dev, MTWEOF);
938 Mmsg2(&dev->errmsg, _("ioctl MTWEOF error on %s. ERR=%s.\n"),
939 dev->dev_name, strerror(dev->dev_errno));
945 * Return string message with last error in English
946 * Be careful not to call this routine from within dev.c
947 * while editing an Mmsg(&) or you will end up in a recursive
948 * loop creating a Segmentation Violation.
951 strerror_dev(DEVICE *dev)
958 * If implemented in system, clear the tape
962 clrerror_dev(DEVICE *dev, int func)
966 dev->dev_errno = errno; /* save errno */
968 dev->VolCatInfo.VolCatErrors++;
971 if (!(dev->state & ST_TAPE)) {
974 if (errno == ENOTTY || errno == ENOSYS) { /* Function not implemented */
977 Emsg0(M_ABORT, 0, "Got ENOTTY on read/write!\n");
981 dev->capabilities &= ~CAP_EOF; /* turn off feature */
985 dev->capabilities &= ~CAP_EOM; /* turn off feature */
989 dev->capabilities &= ~CAP_FSF; /* turn off feature */
993 dev->capabilities &= ~CAP_BSF; /* turn off feature */
997 dev->capabilities &= ~CAP_FSR; /* turn off feature */
1001 dev->capabilities &= ~CAP_BSR; /* turn off feature */
1008 dev->dev_errno = ENOSYS;
1009 Mmsg1(&dev->errmsg, _("This device does not support %s.\n"), msg);
1010 Emsg0(M_ERROR, 0, dev->errmsg);
1017 mt_com.mt_op = MTIOCLRERR;
1018 mt_com.mt_count = 1;
1019 stat = ioctl(dev->fd, MTIOCTOP, (char *)&mt_com);
1020 Dmsg0(200, "Did MTIOCLRERR\n");
1026 * Flush buffer contents
1029 int flush_dev(DEVICE *dev)
1034 static void do_close(DEVICE *dev)
1037 Dmsg0(29, "really close_dev\n");
1039 /* Clean up device packet so it can be reused */
1041 dev->state &= ~(ST_OPENED|ST_LABEL|ST_READ|ST_APPEND|ST_EOT|ST_WEOT|ST_EOF);
1042 dev->file = dev->block_num = 0;
1044 dev->EndFile = dev->EndBlock = 0;
1045 memset(&dev->VolCatInfo, 0, sizeof(dev->VolCatInfo));
1046 memset(&dev->VolHdr, 0, sizeof(dev->VolHdr));
1049 stop_thread_timer(dev->tid);
1058 close_dev(DEVICE *dev)
1061 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
1062 Emsg0(M_FATAL, 0, dev->errmsg);
1065 if (dev->fd >= 0 && dev->use_count == 1) {
1068 Dmsg0(29, "close_dev but in use so leave open.\n");
1074 * Used when unmounting the device
1076 void force_close_dev(DEVICE *dev)
1079 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
1080 Emsg0(M_FATAL, 0, dev->errmsg);
1083 Dmsg0(29, "really close_dev\n");
1087 int truncate_dev(DEVICE *dev)
1089 if (dev->state & ST_TAPE) {
1092 if (ftruncate(dev->fd, 0) != 0) {
1093 Mmsg1(&dev->errmsg, _("Unable to truncate device. ERR=%s\n"), strerror(errno));
1100 dev_is_tape(DEVICE *dev)
1102 return (dev->state & ST_TAPE) ? 1 : 0;
1106 dev_name(DEVICE *dev)
1108 return dev->dev_name;
1112 dev_vol_name(DEVICE *dev)
1114 return dev->VolCatInfo.VolCatName;
1117 uint32_t dev_block(DEVICE *dev)
1119 update_pos_dev(dev);
1120 return dev->block_num;
1123 uint32_t dev_file(DEVICE *dev)
1125 update_pos_dev(dev);
1130 * Free memory allocated for the device
1133 term_dev(DEVICE *dev)
1136 dev->dev_errno = EBADF;
1137 Mmsg0(&dev->errmsg, _("Bad call to fsf_dev. Archive not open\n"));
1138 Emsg0(M_FATAL, 0, dev->errmsg);
1142 Dmsg0(29, "term_dev\n");
1143 if (dev->dev_name) {
1144 free_memory(dev->dev_name);
1145 dev->dev_name = NULL;
1148 free_pool_memory(dev->errmsg);
1151 pthread_mutex_destroy(&dev->mutex);
1152 pthread_cond_destroy(&dev->wait);
1153 pthread_cond_destroy(&dev->wait_next_vol);
1154 if (dev->state & ST_MALLOC) {
1155 free_pool_memory((POOLMEM *)dev);
1160 /* To make following two functions more readable */
1162 #define attached_jcrs ((JCR *)(dev->attached_jcrs))
1164 void attach_jcr_to_device(DEVICE *dev, JCR *jcr)
1166 jcr->prev_dev = NULL;
1167 jcr->next_dev = attached_jcrs;
1168 if (attached_jcrs) {
1169 attached_jcrs->prev_dev = jcr;
1171 attached_jcrs = jcr;
1172 Dmsg1(100, "Attached Job %s\n", jcr->Job);
1175 void detach_jcr_from_device(DEVICE *dev, JCR *jcr)
1177 if (!jcr->prev_dev) {
1178 attached_jcrs = jcr->next_dev;
1180 jcr->prev_dev->next_dev = jcr->next_dev;
1182 if (jcr->next_dev) {
1183 jcr->next_dev->prev_dev = jcr->prev_dev;
1185 jcr->next_dev = jcr->prev_dev = NULL;
1186 Dmsg1(100, "Detached Job %s\n", jcr->Job);
1189 JCR *next_attached_jcr(DEVICE *dev, JCR *jcr)
1192 return attached_jcrs;
1194 return jcr->next_dev;