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 static bool terminate_writing_volume(DCR *dcr);
31 static bool do_new_file_bookkeeping(DCR *dcr);
32 static bool do_dvd_size_checks(DCR *dcr);
33 static void reread_last_block(DCR *dcr);
36 * Dump the block header, then walk through
37 * the block printing out the record headers.
39 void dump_block(DEV_BLOCK *b, const char *msg)
43 char Id[BLKHDR_ID_LENGTH+1];
44 uint32_t CheckSum, BlockCheckSum;
47 uint32_t VolSessionId, VolSessionTime, data_len;
51 char buf1[100], buf2[100];
53 unser_begin(b->buf, BLKHDR1_LENGTH);
54 unser_uint32(CheckSum);
55 unser_uint32(block_len);
56 unser_uint32(BlockNumber);
57 unser_bytes(Id, BLKHDR_ID_LENGTH);
58 ASSERT(unser_length(b->buf) == BLKHDR1_LENGTH);
59 Id[BLKHDR_ID_LENGTH] = 0;
61 unser_uint32(VolSessionId);
62 unser_uint32(VolSessionTime);
66 VolSessionId = VolSessionTime = 0;
71 if (block_len > 100000) {
72 Dmsg3(20, "Dump block %s 0x%x blocksize too big %u\n", msg, b, block_len);
76 BlockCheckSum = bcrc32((uint8_t *)b->buf+BLKHDR_CS_LENGTH,
77 block_len-BLKHDR_CS_LENGTH);
78 Pmsg6(000, _("Dump block %s %x: size=%d BlkNum=%d\n"
79 " Hdrcksum=%x cksum=%x\n"),
80 msg, b, block_len, BlockNumber, CheckSum, BlockCheckSum);
82 while (p < (b->buf + block_len+WRITE_RECHDR_LENGTH)) {
83 unser_begin(p, WRITE_RECHDR_LENGTH);
84 if (rhl == RECHDR1_LENGTH) {
85 unser_uint32(VolSessionId);
86 unser_uint32(VolSessionTime);
88 unser_int32(FileIndex);
90 unser_uint32(data_len);
91 Pmsg6(000, _(" Rec: VId=%u VT=%u FI=%s Strm=%s len=%d p=%x\n"),
92 VolSessionId, VolSessionTime, FI_to_ascii(buf1, FileIndex),
93 stream_to_ascii(buf2, Stream, FileIndex), data_len, p);
99 * Create a new block structure.
100 * We pass device so that the block can inherit the
101 * min and max block sizes.
103 DEV_BLOCK *new_block(DEVICE *dev)
105 DEV_BLOCK *block = (DEV_BLOCK *)get_memory(sizeof(DEV_BLOCK));
107 memset(block, 0, sizeof(DEV_BLOCK));
109 /* If the user has specified a max_block_size, use it as the default */
110 if (dev->max_block_size == 0) {
111 block->buf_len = DEFAULT_BLOCK_SIZE;
113 block->buf_len = dev->max_block_size;
116 block->block_len = block->buf_len; /* default block size */
117 block->buf = get_memory(block->buf_len);
119 block->BlockVer = BLOCK_VER; /* default write version */
120 Dmsg1(650, "Returning new block=%x\n", block);
126 * Duplicate an existing block (eblock)
128 DEV_BLOCK *dup_block(DEV_BLOCK *eblock)
130 DEV_BLOCK *block = (DEV_BLOCK *)get_memory(sizeof(DEV_BLOCK));
131 int buf_len = sizeof_pool_memory(eblock->buf);
133 memcpy(block, eblock, sizeof(DEV_BLOCK));
134 block->buf = get_memory(buf_len);
135 memcpy(block->buf, eblock->buf, buf_len);
141 * Only the first block checksum error was reported.
142 * If there are more, report it now.
144 void print_block_read_errors(JCR *jcr, DEV_BLOCK *block)
146 if (block->read_errors > 1) {
147 Jmsg(jcr, M_ERROR, 0, _("%d block read errors not printed.\n"),
155 void free_block(DEV_BLOCK *block)
157 Dmsg1(999, "free_block buffer %x\n", block->buf);
158 free_memory(block->buf);
159 Dmsg1(999, "free_block block %x\n", block);
160 free_memory((POOLMEM *)block);
163 /* Empty the block -- for writing */
164 void empty_block(DEV_BLOCK *block)
166 block->binbuf = WRITE_BLKHDR_LENGTH;
167 block->bufp = block->buf + block->binbuf;
169 block->write_failed = false;
170 block->block_read = false;
171 block->FirstIndex = block->LastIndex = 0;
175 * Create block header just before write. The space
176 * in the buffer should have already been reserved by
179 void ser_block_header(DEV_BLOCK *block)
182 uint32_t CheckSum = 0;
183 uint32_t block_len = block->binbuf;
185 Dmsg1(1390, "ser_block_header: block_len=%d\n", block_len);
186 ser_begin(block->buf, BLKHDR2_LENGTH);
187 ser_uint32(CheckSum);
188 ser_uint32(block_len);
189 ser_uint32(block->BlockNumber);
190 ser_bytes(WRITE_BLKHDR_ID, BLKHDR_ID_LENGTH);
191 if (BLOCK_VER >= 2) {
192 ser_uint32(block->VolSessionId);
193 ser_uint32(block->VolSessionTime);
196 /* Checksum whole block except for the checksum */
197 CheckSum = bcrc32((uint8_t *)block->buf+BLKHDR_CS_LENGTH,
198 block_len-BLKHDR_CS_LENGTH);
199 Dmsg1(1390, "ser_bloc_header: checksum=%x\n", CheckSum);
200 ser_begin(block->buf, BLKHDR2_LENGTH);
201 ser_uint32(CheckSum); /* now add checksum to block header */
205 * Unserialize the block header for reading block.
206 * This includes setting all the buffer pointers correctly.
208 * Returns: false on failure (not a block)
211 static bool unser_block_header(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
214 char Id[BLKHDR_ID_LENGTH+1];
215 uint32_t CheckSum, BlockCheckSum;
218 uint32_t BlockNumber;
221 unser_begin(block->buf, BLKHDR_LENGTH);
222 unser_uint32(CheckSum);
223 unser_uint32(block_len);
224 unser_uint32(BlockNumber);
225 unser_bytes(Id, BLKHDR_ID_LENGTH);
226 ASSERT(unser_length(block->buf) == BLKHDR1_LENGTH);
228 Id[BLKHDR_ID_LENGTH] = 0;
230 bhl = BLKHDR1_LENGTH;
232 block->bufp = block->buf + bhl;
233 if (strncmp(Id, BLKHDR1_ID, BLKHDR_ID_LENGTH) != 0) {
234 dev->dev_errno = EIO;
235 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Wanted ID: \"%s\", got \"%s\". Buffer discarded.\n"),
236 dev->file, dev->block_num, BLKHDR1_ID, Id);
237 if (block->read_errors == 0 || verbose >= 2) {
238 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
240 block->read_errors++;
243 } else if (Id[3] == '2') {
244 unser_uint32(block->VolSessionId);
245 unser_uint32(block->VolSessionTime);
246 bhl = BLKHDR2_LENGTH;
248 block->bufp = block->buf + bhl;
249 if (strncmp(Id, BLKHDR2_ID, BLKHDR_ID_LENGTH) != 0) {
250 dev->dev_errno = EIO;
251 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Wanted ID: \"%s\", got \"%s\". Buffer discarded.\n"),
252 dev->file, dev->block_num, BLKHDR2_ID, Id);
253 if (block->read_errors == 0 || verbose >= 2) {
254 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
256 block->read_errors++;
260 dev->dev_errno = EIO;
261 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Wanted ID: \"%s\", got \"%s\". Buffer discarded.\n"),
262 dev->file, dev->block_num, BLKHDR2_ID, Id);
263 if (block->read_errors == 0 || verbose >= 2) {
264 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
266 block->read_errors++;
267 unser_uint32(block->VolSessionId);
268 unser_uint32(block->VolSessionTime);
273 if (block_len > MAX_BLOCK_LENGTH) {
274 dev->dev_errno = EIO;
275 Mmsg3(dev->errmsg, _("Volume data error at %u:%u! Block length %u is insane (too large), probably due to a bad archive.\n"),
276 dev->file, dev->block_num, block_len);
277 if (block->read_errors == 0 || verbose >= 2) {
278 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
280 block->read_errors++;
284 Dmsg1(390, "unser_block_header block_len=%d\n", block_len);
285 /* Find end of block or end of buffer whichever is smaller */
286 if (block_len > block->read_len) {
287 block_end = block->read_len;
289 block_end = block_len;
291 block->binbuf = block_end - bhl;
292 block->block_len = block_len;
293 block->BlockNumber = BlockNumber;
294 Dmsg3(390, "Read binbuf = %d %d block_len=%d\n", block->binbuf,
296 if (block_len <= block->read_len) {
297 BlockCheckSum = bcrc32((uint8_t *)block->buf+BLKHDR_CS_LENGTH,
298 block_len-BLKHDR_CS_LENGTH);
299 if (BlockCheckSum != CheckSum) {
300 dev->dev_errno = EIO;
301 Mmsg6(dev->errmsg, _("Volume data error at %u:%u!\n"
302 "Block checksum mismatch in block=%u len=%d: calc=%x blk=%x\n"),
303 dev->file, dev->block_num, (unsigned)BlockNumber,
304 block_len, BlockCheckSum, CheckSum);
305 if (block->read_errors == 0 || verbose >= 2) {
306 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
308 block->read_errors++;
318 * Write a block to the device, with locking and unlocking
320 * Returns: true on success
324 bool write_block_to_device(DCR *dcr)
327 DEVICE *dev = dcr->dev;
331 stat = write_block_to_spool_file(dcr);
335 if (!dcr->dev_locked) {
340 * If a new volume has been mounted since our last write
341 * Create a JobMedia record for the previous volume written,
342 * and set new parameters to write this volume
343 * The same applies for if we are in a new file.
345 if (dcr->NewVol || dcr->NewFile) {
346 if (job_canceled(jcr)) {
350 /* Create a jobmedia record for this job */
351 if (!dir_create_jobmedia_record(dcr)) {
352 dev->dev_errno = EIO;
353 Jmsg(jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
354 dcr->VolCatInfo.VolCatName, jcr->Job);
355 set_new_volume_parameters(dcr);
360 /* Note, setting a new volume also handles any pending new file */
361 set_new_volume_parameters(dcr);
362 dcr->NewFile = false; /* this handled for new file too */
364 set_new_file_parameters(dcr);
368 if (!write_block_to_dev(dcr)) {
369 if (job_canceled(jcr) || jcr->JobType == JT_SYSTEM) {
372 stat = fixup_device_block_write_error(dcr);
377 if (!dcr->dev_locked) {
384 * Write a block to the device
386 * Returns: true on success or EOT
387 * false on hard error
389 bool write_block_to_dev(DCR *dcr)
392 uint32_t wlen; /* length to write */
393 int hit_max1, hit_max2;
395 DEVICE *dev = dcr->dev;
397 DEV_BLOCK *block = dcr->block;
399 #ifdef NO_TAPE_WRITE_TEST
403 ASSERT(block->binbuf == ((uint32_t) (block->bufp - block->buf)));
405 /* dump_block(block, "before write"); */
406 if (dev->at_weot()) {
407 Dmsg0(100, "return write_block_to_dev with ST_WEOT\n");
408 dev->dev_errno = ENOSPC;
409 Jmsg(jcr, M_FATAL, 0, _("Cannot write block. Device at EOM.\n"));
412 if (!dev->can_append()) {
413 dev->dev_errno = EIO;
414 Jmsg(jcr, M_FATAL, 0, _("Attempt to write on read-only Volume.\n"));
417 wlen = block->binbuf;
418 if (wlen <= WRITE_BLKHDR_LENGTH) { /* Does block have data in it? */
419 Dmsg0(100, "return write_block_to_dev no data to write\n");
423 * Clear to the end of the buffer if it is not full,
424 * and on tape devices, apply min and fixed blocking.
426 if (wlen != block->buf_len) {
427 uint32_t blen; /* current buffer length */
429 Dmsg2(200, "binbuf=%d buf_len=%d\n", block->binbuf, block->buf_len);
432 /* Adjust write size to min/max for tapes only */
433 if (dev->is_tape()) {
434 /* check for fixed block size */
435 if (dev->min_block_size == dev->max_block_size) {
436 wlen = block->buf_len; /* fixed block size already rounded */
437 /* Check for min block size */
438 } else if (wlen < dev->min_block_size) {
439 wlen = ((dev->min_block_size + TAPE_BSIZE - 1) / TAPE_BSIZE) * TAPE_BSIZE;
440 /* Ensure size is rounded */
442 wlen = ((wlen + TAPE_BSIZE - 1) / TAPE_BSIZE) * TAPE_BSIZE;
446 memset(block->bufp, 0, wlen-blen); /* clear garbage */
450 ser_block_header(block);
452 /* Limit maximum Volume size to value specified by user */
453 hit_max1 = (dev->max_volume_size > 0) &&
454 ((dev->VolCatInfo.VolCatBytes + block->binbuf)) >= dev->max_volume_size;
455 hit_max2 = (dev->VolCatInfo.VolCatMaxBytes > 0) &&
456 ((dev->VolCatInfo.VolCatBytes + block->binbuf)) >= dev->VolCatInfo.VolCatMaxBytes;
457 if (hit_max1 || hit_max2) {
460 Dmsg0(10, "==== Output bytes Triggered medium max capacity.\n");
462 max_cap = dev->max_volume_size;
464 max_cap = dev->VolCatInfo.VolCatMaxBytes;
466 Jmsg(jcr, M_INFO, 0, _("User defined maximum volume capacity %s exceeded on device %s.\n"),
467 edit_uint64_with_commas(max_cap, ed1), dev->print_name());
468 terminate_writing_volume(dcr);
469 reread_last_block(dcr); /* DEBUG */
470 dev->dev_errno = ENOSPC;
474 /* Limit maximum File size on volume to user specified value */
475 if ((dev->max_file_size > 0) &&
476 (dev->file_size+block->binbuf) >= dev->max_file_size) {
477 dev->file_size = 0; /* reset file size */
479 if (!dev->weof(1)) { /* write eof */
480 Dmsg0(190, "WEOF error in max file size.\n");
481 Jmsg(jcr, M_FATAL, 0, _("Unable to write EOF. ERR=%s\n"),
483 terminate_writing_volume(dcr);
484 dev->dev_errno = ENOSPC;
487 if (!write_ansi_ibm_labels(dcr, ANSI_EOF_LABEL, dev->VolHdr.VolumeName)) {
491 if (!do_new_file_bookkeeping(dcr)) {
492 /* Error message already sent */
497 if (!do_dvd_size_checks(dcr)) {
498 /* Error message already sent */
502 dev->VolCatInfo.VolCatWrites++;
503 Dmsg1(1300, "Write block of %u bytes\n", wlen);
504 #ifdef DEBUG_BLOCK_ZEROING
505 uint32_t *bp = (uint32_t *)block->buf;
506 if (bp[0] == 0 && bp[1] == 0 && bp[2] == 0 && block->buf[12] == 0) {
507 Jmsg0(jcr, M_ABORT, 0, _("Write block header zeroed.\n"));
514 stat = write(dev->fd, block->buf, (size_t)wlen);
516 #ifdef DEBUG_BLOCK_ZEROING
517 if (bp[0] == 0 && bp[1] == 0 && bp[2] == 0 && block->buf[12] == 0) {
518 Jmsg0(jcr, M_ABORT, 0, _("Write block header zeroed.\n"));
522 if (stat != (ssize_t)wlen) {
523 /* Some devices simply report EIO when the volume is full.
524 * With a little more thought we may be able to check
525 * capacity and distinguish real errors and EOT
526 * conditions. In any case, we probably want to
527 * simulate an End of Medium.
532 if (dev->dev_errno == 0) {
533 dev->dev_errno = ENOSPC; /* out of space */
535 if (dev->dev_errno != ENOSPC) {
536 Jmsg4(jcr, M_ERROR, 0, _("Write error at %u:%u on device %s. ERR=%s.\n"),
537 dev->file, dev->block_num, dev->print_name(), be.strerror());
540 dev->dev_errno = ENOSPC; /* out of space */
542 if (dev->dev_errno == ENOSPC) {
543 Jmsg(jcr, M_INFO, 0, _("End of Volume \"%s\" at %u:%u on device %s. Write of %u bytes got %d.\n"),
544 dev->VolCatInfo.VolCatName,
545 dev->file, dev->block_num, dev->print_name(), wlen, stat);
547 Dmsg7(100, "=== Write error. fd=%d size=%u rtn=%d dev_blk=%d blk_blk=%d errno=%d: ERR=%s\n",
548 dev->fd, wlen, stat, dev->block_num, block->BlockNumber,
549 dev->dev_errno, strerror(dev->dev_errno));
551 ok = terminate_writing_volume(dcr);
552 if (!ok && !forge_on) {
556 reread_last_block(dcr);
561 /* We successfully wrote the block, now do housekeeping */
563 dev->VolCatInfo.VolCatBytes += block->binbuf;
564 dev->VolCatInfo.VolCatBlocks++;
565 dev->EndBlock = dev->block_num;
566 dev->EndFile = dev->file;
568 block->BlockNumber++;
570 /* Update dcr values */
571 if (dev->is_tape()) {
572 dcr->EndBlock = dev->EndBlock;
573 dcr->EndFile = dev->EndFile;
575 /* Save address of block just written */
576 uint64_t addr = dev->file_addr + wlen - 1;
577 dcr->EndBlock = (uint32_t)addr;
578 dcr->EndFile = (uint32_t)(addr >> 32);
579 dev->block_num = dcr->EndBlock;
580 dev->file = dcr->EndFile;
582 if (dcr->VolFirstIndex == 0 && block->FirstIndex > 0) {
583 dcr->VolFirstIndex = block->FirstIndex;
585 if (block->LastIndex > 0) {
586 dcr->VolLastIndex = block->LastIndex;
588 dcr->WroteVol = true;
589 dev->file_addr += wlen; /* update file address */
590 dev->file_size += wlen;
591 dev->part_size += wlen;
593 Dmsg2(1300, "write_block: wrote block %d bytes=%d\n", dev->block_num, wlen);
598 static void reread_last_block(DCR *dcr)
600 #define CHECK_LAST_BLOCK
601 #ifdef CHECK_LAST_BLOCK
603 DEVICE *dev = dcr->dev;
605 DEV_BLOCK *block = dcr->block;
607 * If the device is a tape and it supports backspace record,
608 * we backspace over one or two eof marks depending on
609 * how many we just wrote, then over the last record,
610 * then re-read it and verify that the block number is
613 if (dev->is_tape() && dev_cap(dev, CAP_BSR)) {
614 /* Now back up over what we wrote and read the last block */
618 Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"),
619 be.strerror(dev->dev_errno));
621 if (ok && dev->has_cap(CAP_TWOEOF) && !dev->bsf(1)) {
624 Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"),
625 be.strerror(dev->dev_errno));
627 /* Backspace over record */
628 if (ok && !dev->bsr(1)) {
631 Jmsg(jcr, M_ERROR, 0, _("Backspace record at EOT failed. ERR=%s\n"),
632 be.strerror(dev->dev_errno));
634 * On FreeBSD systems, if the user got here, it is likely that his/her
635 * tape drive is "frozen". The correct thing to do is a
636 * rewind(), but if we do that, higher levels in cleaning up, will
637 * most likely write the EOS record over the beginning of the
638 * tape. The rewind *is* done later in mount.c when another
639 * tape is requested. Note, the clrerror_dev() call in bsr()
640 * calls ioctl(MTCERRSTAT), which *should* fix the problem.
644 DEV_BLOCK *lblock = new_block(dev);
645 /* Note, this can destroy dev->errmsg */
647 if (!read_block_from_dev(dcr, NO_BLOCK_NUMBER_CHECK)) {
648 Jmsg(jcr, M_ERROR, 0, _("Re-read last block at EOT failed. ERR=%s"),
652 * If we wrote block and the block numbers don't agree
653 * we have a possible problem.
655 if (lblock->VolSessionId == block->VolSessionId &&
656 lblock->BlockNumber+1 != block->BlockNumber) {
657 Jmsg(jcr, M_ERROR, 0, _(
658 "Re-read of last block OK, but block numbers differ. Last block=%u Current block=%u.\n"),
659 lblock->BlockNumber, block->BlockNumber);
661 Jmsg(jcr, M_INFO, 0, _("Re-read of last block succeeded.\n"));
671 static bool terminate_writing_volume(DCR *dcr)
673 DEVICE *dev = dcr->dev;
676 /* Create a JobMedia record to indicated end of tape */
677 dev->VolCatInfo.VolCatFiles = dev->file;
678 if (!dir_create_jobmedia_record(dcr)) {
679 Dmsg0(190, "Error from create JobMedia\n");
680 dev->dev_errno = EIO;
681 Jmsg(dcr->jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
682 dcr->VolCatInfo.VolCatName, dcr->jcr->Job);
686 dcr->block->write_failed = true;
687 if (!dev->weof(1)) { /* end the tape */
688 dev->VolCatInfo.VolCatErrors++;
689 Jmsg(dcr->jcr, M_ERROR, 0, _("Error writing final EOF to tape. This Volume may not be readable.\n"
692 Dmsg0(100, "WEOF error.\n");
695 ok = write_ansi_ibm_labels(dcr, ANSI_EOV_LABEL, dev->VolHdr.VolumeName);
697 bstrncpy(dev->VolCatInfo.VolCatStatus, "Full", sizeof(dev->VolCatInfo.VolCatStatus));
698 dev->VolCatInfo.VolCatFiles = dev->file; /* set number of files */
699 dev->VolCatInfo.VolCatJobs++; /* increment number of jobs */
702 dvd_write_part(dcr); /* write last part */
703 dev->VolCatInfo.VolCatParts = dev->num_parts;
706 if (!dir_update_volume_info(dcr, false)) {
709 Dmsg1(100, "dir_update_volume_info terminate writing -- %s\n", ok?"OK":"ERROR");
712 * Walk through all attached dcrs setting flag to call
713 * set_new_file_parameters() when that dcr is next used.
716 foreach_dlist(mdcr, dev->attached_dcrs) {
717 if (mdcr->jcr->JobId == 0) {
720 mdcr->NewFile = true; /* set reminder to do set_new_file_params */
722 /* Set new file/block parameters for current dcr */
723 set_new_file_parameters(dcr);
725 if (ok && dev_cap(dev, CAP_TWOEOF) && !dev->weof(1)) { /* end the tape */
726 dev->VolCatInfo.VolCatErrors++;
727 /* This may not be fatal since we already wrote an EOF */
728 Jmsg(dcr->jcr, M_ERROR, 0, "%s", dev->errmsg);
731 dev->set_ateot(); /* no more writing this tape */
732 Dmsg1(100, "Leave terminate_writing_volume -- %s\n", ok?"OK":"ERROR");
737 * Do bookkeeping when a new file is created on a Volume. This is
738 * also done for disk files to generate the jobmedia records for
741 static bool do_new_file_bookkeeping(DCR *dcr)
743 DEVICE *dev = dcr->dev;
746 /* Create a JobMedia record so restore can seek */
747 if (!dir_create_jobmedia_record(dcr)) {
748 Dmsg0(190, "Error from create_job_media.\n");
749 dev->dev_errno = EIO;
750 Jmsg(jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
751 dcr->VolCatInfo.VolCatName, jcr->Job);
752 terminate_writing_volume(dcr);
753 dev->dev_errno = EIO;
756 dev->VolCatInfo.VolCatFiles = dev->file;
757 if (!dir_update_volume_info(dcr, false)) {
758 Dmsg0(190, "Error from update_vol_info.\n");
759 terminate_writing_volume(dcr);
760 dev->dev_errno = EIO;
763 Dmsg0(100, "dir_update_volume_info max file size -- OK\n");
766 * Walk through all attached dcrs setting flag to call
767 * set_new_file_parameters() when that dcr is next used.
770 foreach_dlist(mdcr, dev->attached_dcrs) {
771 if (mdcr->jcr->JobId == 0) {
774 mdcr->NewFile = true; /* set reminder to do set_new_file_params */
776 /* Set new file/block parameters for current dcr */
777 set_new_file_parameters(dcr);
782 * Do all checks for DVD sizes during writing.
784 static bool do_dvd_size_checks(DCR *dcr)
786 DEVICE *dev = dcr->dev;
788 DEV_BLOCK *block = dcr->block;
790 /* Don't go further if the device is not a dvd */
791 if (!dev->is_dvd()) {
795 /* Limit maximum part size to value specified by user
797 if (dev->max_part_size > 0 && ((dev->part_size + block->binbuf) >= dev->max_part_size)) {
798 if (dev->part < dev->num_parts) {
799 Jmsg3(dcr->jcr, M_FATAL, 0, _("Error while writing, current part number"
800 " is less than the total number of parts (%d/%d, device=%s)\n"),
801 dev->part, dev->num_parts, dev->print_name());
802 dev->dev_errno = EIO;
806 if (dvd_open_next_part(dcr) < 0) {
807 Jmsg2(dcr->jcr, M_FATAL, 0, _("Unable to open device next part %s: ERR=%s\n"),
808 dev->print_name(), dev->bstrerror());
809 dev->dev_errno = EIO;
813 dev->VolCatInfo.VolCatParts = dev->num_parts;
815 if (!dir_update_volume_info(dcr, false)) {
816 Dmsg0(190, "Error from update_vol_info.\n");
817 dev->dev_errno = EIO;
822 if (!dev->is_freespace_ok()) { /* Error while getting free space */
823 char ed1[50], ed2[50];
824 Dmsg1(10, "Cannot get free space on the device ERR=%s.\n", dev->errmsg);
825 Jmsg(jcr, M_FATAL, 0, _("End of Volume \"%s\" at %u:%u on device %s "
826 "(part_size=%s, free_space=%s, free_space_errno=%d, errmsg=%s).\n"),
827 dev->VolCatInfo.VolCatName,
828 dev->file, dev->block_num, dev->print_name(),
829 edit_uint64_with_commas(dev->part_size, ed1), edit_uint64_with_commas(dev->free_space, ed2),
830 dev->free_space_errno, dev->errmsg);
831 dev->dev_errno = dev->free_space_errno;
835 if ((dev->is_freespace_ok() && (dev->part_size + block->binbuf) >= dev->free_space)) {
836 char ed1[50], ed2[50];
837 Dmsg0(10, "==== Just enough free space on the device to write the current part...\n");
838 Jmsg(jcr, M_INFO, 0, _("End of Volume \"%s\" at %u:%u on device %s "
839 "(part_size=%s, free_space=%s, free_space_errno=%d).\n"),
840 dev->VolCatInfo.VolCatName,
841 dev->file, dev->block_num, dev->print_name(),
842 edit_uint64_with_commas(dev->part_size, ed1), edit_uint64_with_commas(dev->free_space, ed2),
843 dev->free_space_errno);
844 terminate_writing_volume(dcr);
845 dev->dev_errno = ENOSPC;
853 * Read block with locking
856 bool read_block_from_device(DCR *dcr, bool check_block_numbers)
859 DEVICE *dev = dcr->dev;
860 Dmsg0(200, "Enter read_block_from_device\n");
862 ok = read_block_from_dev(dcr, check_block_numbers);
864 Dmsg0(200, "Leave read_block_from_device\n");
869 * Read the next block into the block structure and unserialize
870 * the block header. For a file, the block may be partially
871 * or completely in the current buffer.
873 bool read_block_from_dev(DCR *dcr, bool check_block_numbers)
877 uint32_t BlockNumber;
880 DEVICE *dev = dcr->dev;
881 DEV_BLOCK *block = dcr->block;
887 Dmsg1(200, "Full read() in read_block_from_device() len=%d\n",
891 dev->dev_errno = EIO;
892 Mmsg1(dev->errmsg, _("Block buffer size looping problem on device %s\n"),
894 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
899 /*Dmsg1(100, "dev->file_size=%u\n",(unsigned int)dev->file_size);
900 Dmsg1(100, "dev->file_addr=%u\n",(unsigned int)dev->file_addr);
901 Dmsg1(100, "lseek=%u\n",(unsigned int)lseek(dev->fd, 0, SEEK_CUR));
902 Dmsg1(100, "dev->part_start=%u\n",(unsigned int)dev->part_start);
903 Dmsg1(100, "dev->file_addr-dev->part_start=%u\n",(unsigned int)dev->file_addr-dev->part_start);
904 Dmsg1(100, "dev->file_size-dev->part_start=%u\n",(unsigned int)dev->file_size-dev->part_start);
905 Dmsg1(100, "dev->part_size=%u\n", (unsigned int)dev->part_size);
906 Dmsg1(100, "dev->part=%u\n", (unsigned int)dev->part);
907 Dmsg1(100, "dev->num_parts=%u\n", (unsigned int)dev->num_parts);
908 Dmsg1(100, "dev->VolCatInfo.VolCatParts=%u\n", (unsigned int)dev->VolCatInfo.VolCatParts);
909 Dmsg3(100, "Tests : %d %d %d\n", (dev->VolCatInfo.VolCatParts > 0),
910 ((dev->file_addr-dev->part_start) == dev->part_size),
911 (dev->part <= dev->VolCatInfo.VolCatParts));*/
912 /* Check for DVD part file end */
913 if (dev->at_eof() && dev->is_dvd() && dev->num_parts > 0 &&
914 dev->part < dev->num_parts) {
915 if (dvd_open_next_part(dcr) < 0) {
916 Jmsg3(dcr->jcr, M_FATAL, 0, _("Unable to open device part=%d %s: ERR=%s\n"),
917 dev->part, dev->print_name(), dev->bstrerror());
918 dev->dev_errno = EIO;
925 // uint32_t *bp = (uint32_t *)block->buf;
926 // Pmsg3(000, "Read %p %u at %llu\n", block->buf, block->buf_len, lseek(dev->fd, 0, SEEK_CUR));
928 stat = read(dev->fd, block->buf, (size_t)block->buf_len);
930 // Pmsg8(000, "stat=%d Csum=%u blen=%u bnum=%u %c%c%c%c\n",stat, bp[0],bp[1],bp[2],
931 // block->buf[12],block->buf[13],block->buf[14],block->buf[15]);
934 dev->VolCatInfo.VolCatErrors++;
936 } while (stat == -1 && (errno == EINTR || errno == EIO) && retry++ < 11);
940 Dmsg1(200, "Read device got: ERR=%s\n", be.strerror());
942 Mmsg4(dev->errmsg, _("Read error at file:blk %u:%u on device %s. ERR=%s.\n"),
943 dev->file, dev->block_num, dev->print_name(), be.strerror());
944 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
945 if (dev->at_eof()) { /* EOF just seen? */
946 dev->set_eot(); /* yes, error => EOT */
950 Dmsg3(200, "Read device got %d bytes at %u:%u\n", stat,
951 dev->file, dev->block_num);
952 if (stat == 0) { /* Got EOF ! */
955 Mmsg3(dev->errmsg, _("Read zero bytes at %u:%u on device %s.\n"),
956 dev->file, dev->block_num, dev->print_name());
957 if (dev->at_eof()) { /* EOF already read? */
958 dev->set_eot(); /* yes, 2 EOFs => EOT */
962 return false; /* return eof */
964 /* Continue here for successful read */
965 block->read_len = stat; /* save length read */
966 if (block->read_len < BLKHDR2_LENGTH) {
967 dev->dev_errno = EIO;
968 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Very short block of %d bytes on device %s discarded.\n"),
969 dev->file, dev->block_num, block->read_len, dev->print_name());
970 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
971 dev->set_short_block();
972 block->read_len = block->binbuf = 0;
973 return false; /* return error */
976 BlockNumber = block->BlockNumber + 1;
977 if (!unser_block_header(jcr, dev, block)) {
979 dev->file_addr += block->read_len;
980 dev->file_size += block->read_len;
987 * If the block is bigger than the buffer, we reposition for
988 * re-reading the block, allocate a buffer of the correct size,
991 if (block->block_len > block->buf_len) {
992 dev->dev_errno = EIO;
993 Mmsg2(dev->errmsg, _("Block length %u is greater than buffer %u. Attempting recovery.\n"),
994 block->block_len, block->buf_len);
995 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
996 Pmsg1(000, "%s", dev->errmsg);
997 /* Attempt to reposition to re-read the block */
998 if (dev->is_tape()) {
999 Dmsg0(200, "BSR for reread; block too big for buffer.\n");
1001 Jmsg(jcr, M_ERROR, 0, "%s", dev->bstrerror());
1002 block->read_len = 0;
1006 Dmsg0(200, "Seek to beginning of block for reread.\n");
1007 off_t pos = lseek_dev(dev, (off_t)0, SEEK_CUR); /* get curr pos */
1008 pos -= block->read_len;
1009 lseek_dev(dev, pos, SEEK_SET);
1010 dev->file_addr = pos;
1012 Mmsg1(dev->errmsg, _("Setting block buffer size to %u bytes.\n"), block->block_len);
1013 Jmsg(jcr, M_INFO, 0, "%s", dev->errmsg);
1014 Pmsg1(000, "%s", dev->errmsg);
1015 /* Set new block length */
1016 dev->max_block_size = block->block_len;
1017 block->buf_len = block->block_len;
1018 free_memory(block->buf);
1019 block->buf = get_memory(block->buf_len);
1022 goto reread; /* re-read block with correct block size */
1025 if (block->block_len > block->read_len) {
1026 dev->dev_errno = EIO;
1027 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Short block of %d bytes on device %s discarded.\n"),
1028 dev->file, dev->block_num, block->read_len, dev->print_name());
1029 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
1030 dev->set_short_block();
1031 block->read_len = block->binbuf = 0;
1032 return false; /* return error */
1035 dev->clear_short_block();
1037 dev->VolCatInfo.VolCatReads++;
1038 dev->VolCatInfo.VolCatRBytes += block->read_len;
1040 dev->VolCatInfo.VolCatBytes += block->block_len;
1041 dev->VolCatInfo.VolCatBlocks++;
1042 dev->EndBlock = dev->block_num;
1043 dev->EndFile = dev->file;
1046 /* Update dcr values */
1047 if (dev->is_tape()) {
1048 dcr->EndBlock = dev->EndBlock;
1049 dcr->EndFile = dev->EndFile;
1051 uint64_t addr = dev->file_addr + block->read_len - 1;
1052 dcr->EndBlock = (uint32_t)addr;
1053 dcr->EndFile = (uint32_t)(addr >> 32);
1054 dev->block_num = dcr->EndBlock;
1055 dev->file = dcr->EndFile;
1057 dev->file_addr += block->read_len;
1058 dev->file_size += block->read_len;
1061 * If we read a short block on disk,
1062 * seek to beginning of next block. This saves us
1063 * from shuffling blocks around in the buffer. Take a
1064 * look at this from an efficiency stand point later, but
1065 * it should only happen once at the end of each job.
1067 * I've been lseek()ing negative relative to SEEK_CUR for 30
1068 * years now. However, it seems that with the new off_t definition,
1069 * it is not possible to seek negative amounts, so we use two
1070 * lseek(). One to get the position, then the second to do an
1071 * absolute positioning -- so much for efficiency. KES Sep 02.
1073 Dmsg0(200, "At end of read block\n");
1074 if (block->read_len > block->block_len && !dev->is_tape()) {
1076 off_t pos = lseek_dev(dev, (off_t)0, SEEK_CUR); /* get curr pos */
1077 pos -= (block->read_len - block->block_len);
1078 lseek_dev(dev, pos, SEEK_SET);
1079 Dmsg3(200, "Did lseek pos=%s blk_size=%d rdlen=%d\n",
1080 edit_uint64(pos, ed1), block->block_len,
1082 dev->file_addr = pos;
1083 dev->file_size = pos;
1085 Dmsg2(200, "Exit read_block read_len=%d block_len=%d\n",
1086 block->read_len, block->block_len);
1087 block->block_read = true;