3 * block.c -- tape block handling functions
5 * Kern Sibbald, March MMI
6 * added BB02 format October MMII
12 Copyright (C) 2001-2006 Kern Sibbald
14 This program is free software; you can redistribute it and/or
15 modify it under the terms of the GNU General Public License
16 version 2 as amended with additional clauses defined in the
17 file LICENSE in the main source directory.
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 the file LICENSE for additional details.
30 extern int debug_level;
31 static bool terminate_writing_volume(DCR *dcr);
32 static bool do_new_file_bookkeeping(DCR *dcr);
33 static bool do_dvd_size_checks(DCR *dcr);
34 static void reread_last_block(DCR *dcr);
37 * Dump the block header, then walk through
38 * the block printing out the record headers.
40 void dump_block(DEV_BLOCK *b, const char *msg)
44 char Id[BLKHDR_ID_LENGTH+1];
45 uint32_t CheckSum, BlockCheckSum;
48 uint32_t VolSessionId, VolSessionTime, data_len;
52 char buf1[100], buf2[100];
54 unser_begin(b->buf, BLKHDR1_LENGTH);
55 unser_uint32(CheckSum);
56 unser_uint32(block_len);
57 unser_uint32(BlockNumber);
58 unser_bytes(Id, BLKHDR_ID_LENGTH);
59 ASSERT(unser_length(b->buf) == BLKHDR1_LENGTH);
60 Id[BLKHDR_ID_LENGTH] = 0;
62 unser_uint32(VolSessionId);
63 unser_uint32(VolSessionTime);
67 VolSessionId = VolSessionTime = 0;
72 if (block_len > 100000) {
73 Dmsg3(20, "Dump block %s 0x%x blocksize too big %u\n", msg, b, block_len);
77 BlockCheckSum = bcrc32((uint8_t *)b->buf+BLKHDR_CS_LENGTH,
78 block_len-BLKHDR_CS_LENGTH);
79 Pmsg6(000, _("Dump block %s %x: size=%d BlkNum=%d\n"
80 " Hdrcksum=%x cksum=%x\n"),
81 msg, b, block_len, BlockNumber, CheckSum, BlockCheckSum);
83 while (p < (b->buf + block_len+WRITE_RECHDR_LENGTH)) {
84 unser_begin(p, WRITE_RECHDR_LENGTH);
85 if (rhl == RECHDR1_LENGTH) {
86 unser_uint32(VolSessionId);
87 unser_uint32(VolSessionTime);
89 unser_int32(FileIndex);
91 unser_uint32(data_len);
92 Pmsg6(000, _(" Rec: VId=%u VT=%u FI=%s Strm=%s len=%d p=%x\n"),
93 VolSessionId, VolSessionTime, FI_to_ascii(buf1, FileIndex),
94 stream_to_ascii(buf2, Stream, FileIndex), data_len, p);
100 * Create a new block structure.
101 * We pass device so that the block can inherit the
102 * min and max block sizes.
104 DEV_BLOCK *new_block(DEVICE *dev)
106 DEV_BLOCK *block = (DEV_BLOCK *)get_memory(sizeof(DEV_BLOCK));
108 memset(block, 0, sizeof(DEV_BLOCK));
110 /* If the user has specified a max_block_size, use it as the default */
111 if (dev->max_block_size == 0) {
112 block->buf_len = DEFAULT_BLOCK_SIZE;
114 block->buf_len = dev->max_block_size;
117 block->block_len = block->buf_len; /* default block size */
118 block->buf = get_memory(block->buf_len);
120 block->BlockVer = BLOCK_VER; /* default write version */
121 Dmsg1(650, "Returning new block=%x\n", block);
127 * Duplicate an existing block (eblock)
129 DEV_BLOCK *dup_block(DEV_BLOCK *eblock)
131 DEV_BLOCK *block = (DEV_BLOCK *)get_memory(sizeof(DEV_BLOCK));
132 int buf_len = sizeof_pool_memory(eblock->buf);
134 memcpy(block, eblock, sizeof(DEV_BLOCK));
135 block->buf = get_memory(buf_len);
136 memcpy(block->buf, eblock->buf, buf_len);
142 * Only the first block checksum error was reported.
143 * If there are more, report it now.
145 void print_block_read_errors(JCR *jcr, DEV_BLOCK *block)
147 if (block->read_errors > 1) {
148 Jmsg(jcr, M_ERROR, 0, _("%d block read errors not printed.\n"),
156 void free_block(DEV_BLOCK *block)
158 Dmsg1(999, "free_block buffer %x\n", block->buf);
159 free_memory(block->buf);
160 Dmsg1(999, "free_block block %x\n", block);
161 free_memory((POOLMEM *)block);
164 /* Empty the block -- for writing */
165 void empty_block(DEV_BLOCK *block)
167 block->binbuf = WRITE_BLKHDR_LENGTH;
168 block->bufp = block->buf + block->binbuf;
170 block->write_failed = false;
171 block->block_read = false;
172 block->FirstIndex = block->LastIndex = 0;
176 * Create block header just before write. The space
177 * in the buffer should have already been reserved by
180 void ser_block_header(DEV_BLOCK *block)
183 uint32_t CheckSum = 0;
184 uint32_t block_len = block->binbuf;
186 Dmsg1(1390, "ser_block_header: block_len=%d\n", block_len);
187 ser_begin(block->buf, BLKHDR2_LENGTH);
188 ser_uint32(CheckSum);
189 ser_uint32(block_len);
190 ser_uint32(block->BlockNumber);
191 ser_bytes(WRITE_BLKHDR_ID, BLKHDR_ID_LENGTH);
192 if (BLOCK_VER >= 2) {
193 ser_uint32(block->VolSessionId);
194 ser_uint32(block->VolSessionTime);
197 /* Checksum whole block except for the checksum */
198 CheckSum = bcrc32((uint8_t *)block->buf+BLKHDR_CS_LENGTH,
199 block_len-BLKHDR_CS_LENGTH);
200 Dmsg1(1390, "ser_bloc_header: checksum=%x\n", CheckSum);
201 ser_begin(block->buf, BLKHDR2_LENGTH);
202 ser_uint32(CheckSum); /* now add checksum to block header */
206 * Unserialize the block header for reading block.
207 * This includes setting all the buffer pointers correctly.
209 * Returns: false on failure (not a block)
212 static bool unser_block_header(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
215 char Id[BLKHDR_ID_LENGTH+1];
216 uint32_t CheckSum, BlockCheckSum;
219 uint32_t BlockNumber;
222 unser_begin(block->buf, BLKHDR_LENGTH);
223 unser_uint32(CheckSum);
224 unser_uint32(block_len);
225 unser_uint32(BlockNumber);
226 unser_bytes(Id, BLKHDR_ID_LENGTH);
227 ASSERT(unser_length(block->buf) == BLKHDR1_LENGTH);
229 Id[BLKHDR_ID_LENGTH] = 0;
231 bhl = BLKHDR1_LENGTH;
233 block->bufp = block->buf + bhl;
234 if (strncmp(Id, BLKHDR1_ID, BLKHDR_ID_LENGTH) != 0) {
235 dev->dev_errno = EIO;
236 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Wanted ID: \"%s\", got \"%s\". Buffer discarded.\n"),
237 dev->file, dev->block_num, BLKHDR1_ID, Id);
238 if (block->read_errors == 0 || verbose >= 2) {
239 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
241 block->read_errors++;
244 } else if (Id[3] == '2') {
245 unser_uint32(block->VolSessionId);
246 unser_uint32(block->VolSessionTime);
247 bhl = BLKHDR2_LENGTH;
249 block->bufp = block->buf + bhl;
250 if (strncmp(Id, BLKHDR2_ID, BLKHDR_ID_LENGTH) != 0) {
251 dev->dev_errno = EIO;
252 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Wanted ID: \"%s\", got \"%s\". Buffer discarded.\n"),
253 dev->file, dev->block_num, BLKHDR2_ID, Id);
254 if (block->read_errors == 0 || verbose >= 2) {
255 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
257 block->read_errors++;
261 dev->dev_errno = EIO;
262 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Wanted ID: \"%s\", got \"%s\". Buffer discarded.\n"),
263 dev->file, dev->block_num, BLKHDR2_ID, Id);
264 if (block->read_errors == 0 || verbose >= 2) {
265 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
267 block->read_errors++;
268 unser_uint32(block->VolSessionId);
269 unser_uint32(block->VolSessionTime);
274 if (block_len > MAX_BLOCK_LENGTH) {
275 dev->dev_errno = EIO;
276 Mmsg3(dev->errmsg, _("Volume data error at %u:%u! Block length %u is insane (too large), probably due to a bad archive.\n"),
277 dev->file, dev->block_num, block_len);
278 if (block->read_errors == 0 || verbose >= 2) {
279 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
281 block->read_errors++;
285 Dmsg1(390, "unser_block_header block_len=%d\n", block_len);
286 /* Find end of block or end of buffer whichever is smaller */
287 if (block_len > block->read_len) {
288 block_end = block->read_len;
290 block_end = block_len;
292 block->binbuf = block_end - bhl;
293 block->block_len = block_len;
294 block->BlockNumber = BlockNumber;
295 Dmsg3(390, "Read binbuf = %d %d block_len=%d\n", block->binbuf,
297 if (block_len <= block->read_len) {
298 BlockCheckSum = bcrc32((uint8_t *)block->buf+BLKHDR_CS_LENGTH,
299 block_len-BLKHDR_CS_LENGTH);
300 if (BlockCheckSum != CheckSum) {
301 dev->dev_errno = EIO;
302 Mmsg6(dev->errmsg, _("Volume data error at %u:%u!\n"
303 "Block checksum mismatch in block=%u len=%d: calc=%x blk=%x\n"),
304 dev->file, dev->block_num, (unsigned)BlockNumber,
305 block_len, BlockCheckSum, CheckSum);
306 if (block->read_errors == 0 || verbose >= 2) {
307 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
309 block->read_errors++;
319 * Write a block to the device, with locking and unlocking
321 * Returns: true on success
325 bool write_block_to_device(DCR *dcr)
328 DEVICE *dev = dcr->dev;
332 stat = write_block_to_spool_file(dcr);
336 if (!dcr->dev_locked) {
341 * If a new volume has been mounted since our last write
342 * Create a JobMedia record for the previous volume written,
343 * and set new parameters to write this volume
344 * The same applies for if we are in a new file.
346 if (dcr->NewVol || dcr->NewFile) {
347 if (job_canceled(jcr)) {
351 /* Create a jobmedia record for this job */
352 if (!dir_create_jobmedia_record(dcr)) {
353 dev->dev_errno = EIO;
354 Jmsg(jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
355 dcr->VolCatInfo.VolCatName, jcr->Job);
356 set_new_volume_parameters(dcr);
361 /* Note, setting a new volume also handles any pending new file */
362 set_new_volume_parameters(dcr);
363 dcr->NewFile = false; /* this handled for new file too */
365 set_new_file_parameters(dcr);
369 if (!write_block_to_dev(dcr)) {
370 if (job_canceled(jcr) || jcr->JobType == JT_SYSTEM) {
373 stat = fixup_device_block_write_error(dcr);
378 if (!dcr->dev_locked) {
385 * Write a block to the device
387 * Returns: true on success or EOT
388 * false on hard error
390 bool write_block_to_dev(DCR *dcr)
393 uint32_t wlen; /* length to write */
394 int hit_max1, hit_max2;
396 DEVICE *dev = dcr->dev;
398 DEV_BLOCK *block = dcr->block;
400 #ifdef NO_TAPE_WRITE_TEST
404 ASSERT(block->binbuf == ((uint32_t) (block->bufp - block->buf)));
406 /* dump_block(block, "before write"); */
407 if (dev->at_weot()) {
408 Dmsg0(100, "return write_block_to_dev with ST_WEOT\n");
409 dev->dev_errno = ENOSPC;
410 Jmsg(jcr, M_FATAL, 0, _("Cannot write block. Device at EOM.\n"));
413 if (!dev->can_append()) {
414 dev->dev_errno = EIO;
415 Jmsg(jcr, M_FATAL, 0, _("Attempt to write on read-only Volume.\n"));
418 wlen = block->binbuf;
419 if (wlen <= WRITE_BLKHDR_LENGTH) { /* Does block have data in it? */
420 Dmsg0(100, "return write_block_to_dev no data to write\n");
424 * Clear to the end of the buffer if it is not full,
425 * and on tape devices, apply min and fixed blocking.
427 if (wlen != block->buf_len) {
428 uint32_t blen; /* current buffer length */
430 Dmsg2(200, "binbuf=%d buf_len=%d\n", block->binbuf, block->buf_len);
433 /* Adjust write size to min/max for tapes only */
434 if (dev->is_tape()) {
435 /* check for fixed block size */
436 if (dev->min_block_size == dev->max_block_size) {
437 wlen = block->buf_len; /* fixed block size already rounded */
438 /* Check for min block size */
439 } else if (wlen < dev->min_block_size) {
440 wlen = ((dev->min_block_size + TAPE_BSIZE - 1) / TAPE_BSIZE) * TAPE_BSIZE;
441 /* Ensure size is rounded */
443 wlen = ((wlen + TAPE_BSIZE - 1) / TAPE_BSIZE) * TAPE_BSIZE;
447 memset(block->bufp, 0, wlen-blen); /* clear garbage */
451 ser_block_header(block);
453 /* Limit maximum Volume size to value specified by user */
454 hit_max1 = (dev->max_volume_size > 0) &&
455 ((dev->VolCatInfo.VolCatBytes + block->binbuf)) >= dev->max_volume_size;
456 hit_max2 = (dev->VolCatInfo.VolCatMaxBytes > 0) &&
457 ((dev->VolCatInfo.VolCatBytes + block->binbuf)) >= dev->VolCatInfo.VolCatMaxBytes;
458 if (hit_max1 || hit_max2) {
461 Dmsg0(10, "==== Output bytes Triggered medium max capacity.\n");
463 max_cap = dev->max_volume_size;
465 max_cap = dev->VolCatInfo.VolCatMaxBytes;
467 Jmsg(jcr, M_INFO, 0, _("User defined maximum volume capacity %s exceeded on device %s.\n"),
468 edit_uint64_with_commas(max_cap, ed1), dev->print_name());
469 terminate_writing_volume(dcr);
470 reread_last_block(dcr); /* DEBUG */
471 dev->dev_errno = ENOSPC;
475 /* Limit maximum File size on volume to user specified value */
476 if ((dev->max_file_size > 0) &&
477 (dev->file_size+block->binbuf) >= dev->max_file_size) {
478 dev->file_size = 0; /* reset file size */
480 if (!dev->weof(1)) { /* write eof */
481 Dmsg0(190, "WEOF error in max file size.\n");
482 Jmsg(jcr, M_FATAL, 0, _("Unable to write EOF. ERR=%s\n"),
484 terminate_writing_volume(dcr);
485 dev->dev_errno = ENOSPC;
488 if (!write_ansi_ibm_labels(dcr, ANSI_EOF_LABEL, dev->VolHdr.VolumeName)) {
492 if (!do_new_file_bookkeeping(dcr)) {
493 /* Error message already sent */
498 if (!do_dvd_size_checks(dcr)) {
499 /* Error message already sent */
503 dev->VolCatInfo.VolCatWrites++;
504 Dmsg1(1300, "Write block of %u bytes\n", wlen);
505 #ifdef DEBUG_BLOCK_ZEROING
506 uint32_t *bp = (uint32_t *)block->buf;
507 if (bp[0] == 0 && bp[1] == 0 && bp[2] == 0 && block->buf[12] == 0) {
508 Jmsg0(jcr, M_ABORT, 0, _("Write block header zeroed.\n"));
515 stat = write(dev->fd, block->buf, (size_t)wlen);
517 #ifdef DEBUG_BLOCK_ZEROING
518 if (bp[0] == 0 && bp[1] == 0 && bp[2] == 0 && block->buf[12] == 0) {
519 Jmsg0(jcr, M_ABORT, 0, _("Write block header zeroed.\n"));
523 if (stat != (ssize_t)wlen) {
524 /* Some devices simply report EIO when the volume is full.
525 * With a little more thought we may be able to check
526 * capacity and distinguish real errors and EOT
527 * conditions. In any case, we probably want to
528 * simulate an End of Medium.
533 if (dev->dev_errno == 0) {
534 dev->dev_errno = ENOSPC; /* out of space */
536 if (dev->dev_errno != ENOSPC) {
537 Jmsg4(jcr, M_ERROR, 0, _("Write error at %u:%u on device %s. ERR=%s.\n"),
538 dev->file, dev->block_num, dev->print_name(), be.strerror());
541 dev->dev_errno = ENOSPC; /* out of space */
543 if (dev->dev_errno == ENOSPC) {
544 Jmsg(jcr, M_INFO, 0, _("End of Volume \"%s\" at %u:%u on device %s. Write of %u bytes got %d.\n"),
545 dev->VolCatInfo.VolCatName,
546 dev->file, dev->block_num, dev->print_name(), wlen, stat);
548 Dmsg7(100, "=== Write error. fd=%d size=%u rtn=%d dev_blk=%d blk_blk=%d errno=%d: ERR=%s\n",
549 dev->fd, wlen, stat, dev->block_num, block->BlockNumber,
550 dev->dev_errno, strerror(dev->dev_errno));
552 ok = terminate_writing_volume(dcr);
553 if (!ok && !forge_on) {
557 reread_last_block(dcr);
562 /* We successfully wrote the block, now do housekeeping */
564 dev->VolCatInfo.VolCatBytes += block->binbuf;
565 dev->VolCatInfo.VolCatBlocks++;
566 dev->EndBlock = dev->block_num;
567 dev->EndFile = dev->file;
569 block->BlockNumber++;
571 /* Update dcr values */
572 if (dev->is_tape()) {
573 dcr->EndBlock = dev->EndBlock;
574 dcr->EndFile = dev->EndFile;
576 /* Save address of block just written */
577 uint64_t addr = dev->file_addr + wlen - 1;
578 dcr->EndBlock = (uint32_t)addr;
579 dcr->EndFile = (uint32_t)(addr >> 32);
580 dev->block_num = dcr->EndBlock;
581 dev->file = dcr->EndFile;
583 if (dcr->VolFirstIndex == 0 && block->FirstIndex > 0) {
584 dcr->VolFirstIndex = block->FirstIndex;
586 if (block->LastIndex > 0) {
587 dcr->VolLastIndex = block->LastIndex;
589 dcr->WroteVol = true;
590 dev->file_addr += wlen; /* update file address */
591 dev->file_size += wlen;
592 dev->part_size += wlen;
594 Dmsg2(1300, "write_block: wrote block %d bytes=%d\n", dev->block_num, wlen);
599 static void reread_last_block(DCR *dcr)
601 #define CHECK_LAST_BLOCK
602 #ifdef CHECK_LAST_BLOCK
604 DEVICE *dev = dcr->dev;
606 DEV_BLOCK *block = dcr->block;
608 * If the device is a tape and it supports backspace record,
609 * we backspace over one or two eof marks depending on
610 * how many we just wrote, then over the last record,
611 * then re-read it and verify that the block number is
614 if (dev->is_tape() && dev_cap(dev, CAP_BSR)) {
615 /* Now back up over what we wrote and read the last block */
619 Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"),
620 be.strerror(dev->dev_errno));
622 if (ok && dev->has_cap(CAP_TWOEOF) && !dev->bsf(1)) {
625 Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"),
626 be.strerror(dev->dev_errno));
628 /* Backspace over record */
629 if (ok && !dev->bsr(1)) {
632 Jmsg(jcr, M_ERROR, 0, _("Backspace record at EOT failed. ERR=%s\n"),
633 be.strerror(dev->dev_errno));
635 * On FreeBSD systems, if the user got here, it is likely that his/her
636 * tape drive is "frozen". The correct thing to do is a
637 * rewind(), but if we do that, higher levels in cleaning up, will
638 * most likely write the EOS record over the beginning of the
639 * tape. The rewind *is* done later in mount.c when another
640 * tape is requested. Note, the clrerror_dev() call in bsr()
641 * calls ioctl(MTCERRSTAT), which *should* fix the problem.
645 DEV_BLOCK *lblock = new_block(dev);
646 /* Note, this can destroy dev->errmsg */
648 if (!read_block_from_dev(dcr, NO_BLOCK_NUMBER_CHECK)) {
649 Jmsg(jcr, M_ERROR, 0, _("Re-read last block at EOT failed. ERR=%s"),
653 * If we wrote block and the block numbers don't agree
654 * we have a possible problem.
656 if (lblock->VolSessionId == block->VolSessionId &&
657 lblock->BlockNumber+1 != block->BlockNumber) {
658 Jmsg(jcr, M_ERROR, 0, _(
659 "Re-read of last block OK, but block numbers differ. Last block=%u Current block=%u.\n"),
660 lblock->BlockNumber, block->BlockNumber);
662 Jmsg(jcr, M_INFO, 0, _("Re-read of last block succeeded.\n"));
672 static bool terminate_writing_volume(DCR *dcr)
674 DEVICE *dev = dcr->dev;
677 /* Create a JobMedia record to indicated end of tape */
678 dev->VolCatInfo.VolCatFiles = dev->file;
679 if (!dir_create_jobmedia_record(dcr)) {
680 Dmsg0(190, "Error from create JobMedia\n");
681 dev->dev_errno = EIO;
682 Jmsg(dcr->jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
683 dcr->VolCatInfo.VolCatName, dcr->jcr->Job);
687 dcr->block->write_failed = true;
688 if (!dev->weof(1)) { /* end the tape */
689 dev->VolCatInfo.VolCatErrors++;
690 Jmsg(dcr->jcr, M_ERROR, 0, _("Error writing final EOF to tape. This Volume may not be readable.\n"
693 Dmsg0(100, "WEOF error.\n");
696 ok = write_ansi_ibm_labels(dcr, ANSI_EOV_LABEL, dev->VolHdr.VolumeName);
698 bstrncpy(dev->VolCatInfo.VolCatStatus, "Full", sizeof(dev->VolCatInfo.VolCatStatus));
699 dev->VolCatInfo.VolCatFiles = dev->file; /* set number of files */
700 dev->VolCatInfo.VolCatJobs++; /* increment number of jobs */
703 dvd_write_part(dcr); /* write last part */
704 dev->VolCatInfo.VolCatParts = dev->num_parts;
707 if (!dir_update_volume_info(dcr, false)) {
710 Dmsg1(100, "dir_update_volume_info terminate writing -- %s\n", ok?"OK":"ERROR");
713 * Walk through all attached dcrs setting flag to call
714 * set_new_file_parameters() when that dcr is next used.
717 foreach_dlist(mdcr, dev->attached_dcrs) {
718 if (mdcr->jcr->JobId == 0) {
721 mdcr->NewFile = true; /* set reminder to do set_new_file_params */
723 /* Set new file/block parameters for current dcr */
724 set_new_file_parameters(dcr);
726 if (ok && dev_cap(dev, CAP_TWOEOF) && !dev->weof(1)) { /* end the tape */
727 dev->VolCatInfo.VolCatErrors++;
728 /* This may not be fatal since we already wrote an EOF */
729 Jmsg(dcr->jcr, M_ERROR, 0, "%s", dev->errmsg);
732 dev->set_ateot(); /* no more writing this tape */
733 Dmsg1(100, "Leave terminate_writing_volume -- %s\n", ok?"OK":"ERROR");
738 * Do bookkeeping when a new file is created on a Volume. This is
739 * also done for disk files to generate the jobmedia records for
742 static bool do_new_file_bookkeeping(DCR *dcr)
744 DEVICE *dev = dcr->dev;
747 /* Create a JobMedia record so restore can seek */
748 if (!dir_create_jobmedia_record(dcr)) {
749 Dmsg0(190, "Error from create_job_media.\n");
750 dev->dev_errno = EIO;
751 Jmsg(jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
752 dcr->VolCatInfo.VolCatName, jcr->Job);
753 terminate_writing_volume(dcr);
754 dev->dev_errno = EIO;
757 dev->VolCatInfo.VolCatFiles = dev->file;
758 if (!dir_update_volume_info(dcr, false)) {
759 Dmsg0(190, "Error from update_vol_info.\n");
760 terminate_writing_volume(dcr);
761 dev->dev_errno = EIO;
764 Dmsg0(100, "dir_update_volume_info max file size -- OK\n");
767 * Walk through all attached dcrs setting flag to call
768 * set_new_file_parameters() when that dcr is next used.
771 foreach_dlist(mdcr, dev->attached_dcrs) {
772 if (mdcr->jcr->JobId == 0) {
775 mdcr->NewFile = true; /* set reminder to do set_new_file_params */
777 /* Set new file/block parameters for current dcr */
778 set_new_file_parameters(dcr);
783 * Do all checks for DVD sizes during writing.
785 static bool do_dvd_size_checks(DCR *dcr)
787 DEVICE *dev = dcr->dev;
789 DEV_BLOCK *block = dcr->block;
791 /* Don't go further if the device is not a dvd */
792 if (!dev->is_dvd()) {
796 /* Limit maximum part size to value specified by user
798 if (dev->max_part_size > 0 && ((dev->part_size + block->binbuf) >= dev->max_part_size)) {
799 if (dev->part < dev->num_parts) {
800 Jmsg3(dcr->jcr, M_FATAL, 0, _("Error while writing, current part number"
801 " is less than the total number of parts (%d/%d, device=%s)\n"),
802 dev->part, dev->num_parts, dev->print_name());
803 dev->dev_errno = EIO;
807 if (dvd_open_next_part(dcr) < 0) {
808 Jmsg2(dcr->jcr, M_FATAL, 0, _("Unable to open device next part %s: ERR=%s\n"),
809 dev->print_name(), dev->bstrerror());
810 dev->dev_errno = EIO;
814 dev->VolCatInfo.VolCatParts = dev->num_parts;
816 if (!dir_update_volume_info(dcr, false)) {
817 Dmsg0(190, "Error from update_vol_info.\n");
818 dev->dev_errno = EIO;
823 if (!dev->is_freespace_ok()) { /* Error while getting free space */
824 char ed1[50], ed2[50];
825 Dmsg1(10, "Cannot get free space on the device ERR=%s.\n", dev->errmsg);
826 Jmsg(jcr, M_FATAL, 0, _("End of Volume \"%s\" at %u:%u on device %s "
827 "(part_size=%s, free_space=%s, free_space_errno=%d, errmsg=%s).\n"),
828 dev->VolCatInfo.VolCatName,
829 dev->file, dev->block_num, dev->print_name(),
830 edit_uint64_with_commas(dev->part_size, ed1), edit_uint64_with_commas(dev->free_space, ed2),
831 dev->free_space_errno, dev->errmsg);
832 dev->dev_errno = dev->free_space_errno;
836 if ((dev->is_freespace_ok() && (dev->part_size + block->binbuf) >= dev->free_space)) {
837 char ed1[50], ed2[50];
838 Dmsg0(10, "==== Just enough free space on the device to write the current part...\n");
839 Jmsg(jcr, M_INFO, 0, _("End of Volume \"%s\" at %u:%u on device %s "
840 "(part_size=%s, free_space=%s, free_space_errno=%d).\n"),
841 dev->VolCatInfo.VolCatName,
842 dev->file, dev->block_num, dev->print_name(),
843 edit_uint64_with_commas(dev->part_size, ed1), edit_uint64_with_commas(dev->free_space, ed2),
844 dev->free_space_errno);
845 terminate_writing_volume(dcr);
846 dev->dev_errno = ENOSPC;
854 * Read block with locking
857 bool read_block_from_device(DCR *dcr, bool check_block_numbers)
860 DEVICE *dev = dcr->dev;
861 Dmsg0(200, "Enter read_block_from_device\n");
863 ok = read_block_from_dev(dcr, check_block_numbers);
865 Dmsg0(200, "Leave read_block_from_device\n");
870 * Read the next block into the block structure and unserialize
871 * the block header. For a file, the block may be partially
872 * or completely in the current buffer.
874 bool read_block_from_dev(DCR *dcr, bool check_block_numbers)
878 uint32_t BlockNumber;
881 DEVICE *dev = dcr->dev;
882 DEV_BLOCK *block = dcr->block;
888 Dmsg1(200, "Full read() in read_block_from_device() len=%d\n",
892 dev->dev_errno = EIO;
893 Mmsg1(dev->errmsg, _("Block buffer size looping problem on device %s\n"),
895 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
900 /*Dmsg1(100, "dev->file_size=%u\n",(unsigned int)dev->file_size);
901 Dmsg1(100, "dev->file_addr=%u\n",(unsigned int)dev->file_addr);
902 Dmsg1(100, "lseek=%u\n",(unsigned int)lseek(dev->fd, 0, SEEK_CUR));
903 Dmsg1(100, "dev->part_start=%u\n",(unsigned int)dev->part_start);
904 Dmsg1(100, "dev->file_addr-dev->part_start=%u\n",(unsigned int)dev->file_addr-dev->part_start);
905 Dmsg1(100, "dev->file_size-dev->part_start=%u\n",(unsigned int)dev->file_size-dev->part_start);
906 Dmsg1(100, "dev->part_size=%u\n", (unsigned int)dev->part_size);
907 Dmsg1(100, "dev->part=%u\n", (unsigned int)dev->part);
908 Dmsg1(100, "dev->num_parts=%u\n", (unsigned int)dev->num_parts);
909 Dmsg1(100, "dev->VolCatInfo.VolCatParts=%u\n", (unsigned int)dev->VolCatInfo.VolCatParts);
910 Dmsg3(100, "Tests : %d %d %d\n", (dev->VolCatInfo.VolCatParts > 0),
911 ((dev->file_addr-dev->part_start) == dev->part_size),
912 (dev->part <= dev->VolCatInfo.VolCatParts));*/
913 /* Check for part file end */
914 if ((dev->num_parts > 0) &&
915 ((dev->file_addr-dev->part_start) == dev->part_size) &&
916 (dev->part < dev->num_parts)) {
917 if (dvd_open_next_part(dcr) < 0) {
918 Jmsg2(dcr->jcr, M_FATAL, 0, _("Unable to open device next part %s: ERR=%s\n"),
919 dev->print_name(), dev->bstrerror());
920 dev->dev_errno = EIO;
927 // uint32_t *bp = (uint32_t *)block->buf;
928 // Pmsg3(000, "Read %p %u at %llu\n", block->buf, block->buf_len, lseek(dev->fd, 0, SEEK_CUR));
930 stat = read(dev->fd, block->buf, (size_t)block->buf_len);
932 // Pmsg8(000, "stat=%d Csum=%u blen=%u bnum=%u %c%c%c%c\n",stat, bp[0],bp[1],bp[2],
933 // block->buf[12],block->buf[13],block->buf[14],block->buf[15]);
936 dev->VolCatInfo.VolCatErrors++;
938 } while (stat == -1 && (errno == EINTR || errno == EIO) && retry++ < 11);
942 Dmsg1(200, "Read device got: ERR=%s\n", be.strerror());
944 Mmsg4(dev->errmsg, _("Read error at file:blk %u:%u on device %s. ERR=%s.\n"),
945 dev->file, dev->block_num, dev->print_name(), be.strerror());
946 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
947 if (dev->at_eof()) { /* EOF just seen? */
948 dev->set_eot(); /* yes, error => EOT */
952 Dmsg3(200, "Read device got %d bytes at %u:%u\n", stat,
953 dev->file, dev->block_num);
954 if (stat == 0) { /* Got EOF ! */
957 Mmsg3(dev->errmsg, _("Read zero bytes at %u:%u on device %s.\n"),
958 dev->file, dev->block_num, dev->print_name());
959 if (dev->at_eof()) { /* EOF already read? */
960 dev->set_eot(); /* yes, 2 EOFs => EOT */
964 return false; /* return eof */
966 /* Continue here for successful read */
967 block->read_len = stat; /* save length read */
968 if (block->read_len < BLKHDR2_LENGTH) {
969 dev->dev_errno = EIO;
970 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Very short block of %d bytes on device %s discarded.\n"),
971 dev->file, dev->block_num, block->read_len, dev->print_name());
972 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
973 dev->set_short_block();
974 block->read_len = block->binbuf = 0;
975 return false; /* return error */
978 BlockNumber = block->BlockNumber + 1;
979 if (!unser_block_header(jcr, dev, block)) {
981 dev->file_addr += block->read_len;
982 dev->file_size += block->read_len;
989 * If the block is bigger than the buffer, we reposition for
990 * re-reading the block, allocate a buffer of the correct size,
993 if (block->block_len > block->buf_len) {
994 dev->dev_errno = EIO;
995 Mmsg2(dev->errmsg, _("Block length %u is greater than buffer %u. Attempting recovery.\n"),
996 block->block_len, block->buf_len);
997 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
998 Pmsg1(000, "%s", dev->errmsg);
999 /* Attempt to reposition to re-read the block */
1000 if (dev->is_tape()) {
1001 Dmsg0(200, "BSR for reread; block too big for buffer.\n");
1003 Jmsg(jcr, M_ERROR, 0, "%s", dev->bstrerror());
1004 block->read_len = 0;
1008 Dmsg0(200, "Seek to beginning of block for reread.\n");
1009 off_t pos = lseek_dev(dev, (off_t)0, SEEK_CUR); /* get curr pos */
1010 pos -= block->read_len;
1011 lseek_dev(dev, pos, SEEK_SET);
1012 dev->file_addr = pos;
1014 Mmsg1(dev->errmsg, _("Setting block buffer size to %u bytes.\n"), block->block_len);
1015 Jmsg(jcr, M_INFO, 0, "%s", dev->errmsg);
1016 Pmsg1(000, "%s", dev->errmsg);
1017 /* Set new block length */
1018 dev->max_block_size = block->block_len;
1019 block->buf_len = block->block_len;
1020 free_memory(block->buf);
1021 block->buf = get_memory(block->buf_len);
1024 goto reread; /* re-read block with correct block size */
1027 if (block->block_len > block->read_len) {
1028 dev->dev_errno = EIO;
1029 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Short block of %d bytes on device %s discarded.\n"),
1030 dev->file, dev->block_num, block->read_len, dev->print_name());
1031 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
1032 dev->set_short_block();
1033 block->read_len = block->binbuf = 0;
1034 return false; /* return error */
1037 dev->clear_short_block();
1039 dev->VolCatInfo.VolCatReads++;
1040 dev->VolCatInfo.VolCatRBytes += block->read_len;
1042 dev->VolCatInfo.VolCatBytes += block->block_len;
1043 dev->VolCatInfo.VolCatBlocks++;
1044 dev->EndBlock = dev->block_num;
1045 dev->EndFile = dev->file;
1048 /* Update dcr values */
1049 if (dev->is_tape()) {
1050 dcr->EndBlock = dev->EndBlock;
1051 dcr->EndFile = dev->EndFile;
1053 uint64_t addr = dev->file_addr + block->read_len - 1;
1054 dcr->EndBlock = (uint32_t)addr;
1055 dcr->EndFile = (uint32_t)(addr >> 32);
1056 dev->block_num = dcr->EndBlock;
1057 dev->file = dcr->EndFile;
1059 dev->file_addr += block->read_len;
1060 dev->file_size += block->read_len;
1063 * If we read a short block on disk,
1064 * seek to beginning of next block. This saves us
1065 * from shuffling blocks around in the buffer. Take a
1066 * look at this from an efficiency stand point later, but
1067 * it should only happen once at the end of each job.
1069 * I've been lseek()ing negative relative to SEEK_CUR for 30
1070 * years now. However, it seems that with the new off_t definition,
1071 * it is not possible to seek negative amounts, so we use two
1072 * lseek(). One to get the position, then the second to do an
1073 * absolute positioning -- so much for efficiency. KES Sep 02.
1075 Dmsg0(200, "At end of read block\n");
1076 if (block->read_len > block->block_len && !dev->is_tape()) {
1078 off_t pos = lseek_dev(dev, (off_t)0, SEEK_CUR); /* get curr pos */
1079 pos -= (block->read_len - block->block_len);
1080 lseek_dev(dev, pos, SEEK_SET);
1081 Dmsg3(200, "Did lseek pos=%s blk_size=%d rdlen=%d\n",
1082 edit_uint64(pos, ed1), block->block_len,
1084 dev->file_addr = pos;
1085 dev->file_size = pos;
1087 Dmsg2(200, "Exit read_block read_len=%d block_len=%d\n",
1088 block->read_len, block->block_len);
1089 block->block_read = true;