3 * block.c -- tape block handling functions
5 * Kern Sibbald, March MMI
6 * added BB02 format October MMII
12 Copyright (C) 2001-2005 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;
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(FileIndex),
93 stream_to_ascii(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 (weof_dev(dev, 1) != 0) { /* 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.
531 clrerror_dev(dev, -1);
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 */
615 if (!bsf_dev(dev, 1)) {
618 Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"),
619 be.strerror(dev->dev_errno));
621 if (ok && dev_cap(dev, CAP_TWOEOF) && !bsf_dev(dev, 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 && !bsr_dev(dev, 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_dev()
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"),
651 if (lblock->BlockNumber+1 == block->BlockNumber) {
652 Jmsg(jcr, M_INFO, 0, _("Re-read of last block succeeded.\n"));
654 Jmsg(jcr, M_ERROR, 0, _(
655 "Re-read of last block failed. Last block=%u Current block=%u.\n"),
656 lblock->BlockNumber, block->BlockNumber);
666 static bool terminate_writing_volume(DCR *dcr)
668 DEVICE *dev = dcr->dev;
671 /* Create a JobMedia record to indicated end of tape */
672 dev->VolCatInfo.VolCatFiles = dev->file;
673 if (!dir_create_jobmedia_record(dcr)) {
674 Dmsg0(190, "Error from create JobMedia\n");
675 dev->dev_errno = EIO;
676 Jmsg(dcr->jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
677 dcr->VolCatInfo.VolCatName, dcr->jcr->Job);
681 dcr->block->write_failed = true;
682 if (weof_dev(dev, 1) != 0) { /* end the tape */
683 dev->VolCatInfo.VolCatErrors++;
684 Jmsg(dcr->jcr, M_ERROR, 0, _("Error writing final EOF to tape. This tape may not be readable.\n"
687 Dmsg0(100, "WEOF error.\n");
690 ok = write_ansi_ibm_labels(dcr, ANSI_EOV_LABEL, dev->VolHdr.VolumeName);
692 bstrncpy(dev->VolCatInfo.VolCatStatus, "Full", sizeof(dev->VolCatInfo.VolCatStatus));
693 dev->VolCatInfo.VolCatFiles = dev->file; /* set number of files */
694 dev->VolCatInfo.VolCatJobs++; /* increment number of jobs */
696 if (dev->is_dvd()) { /* Write the current (and last) part. */
700 if (!dir_update_volume_info(dcr, false)) {
703 Dmsg1(100, "dir_update_volume_info terminate writing -- %s\n", ok?"OK":"ERROR");
706 * Walk through all attached dcrs setting flag to call
707 * set_new_file_parameters() when that dcr is next used.
710 foreach_dlist(mdcr, dev->attached_dcrs) {
711 if (mdcr->jcr->JobId == 0) {
714 mdcr->NewFile = true; /* set reminder to do set_new_file_params */
716 /* Set new file/block parameters for current dcr */
717 set_new_file_parameters(dcr);
719 if (ok && dev_cap(dev, CAP_TWOEOF) && weof_dev(dev, 1) != 0) { /* end the tape */
720 dev->VolCatInfo.VolCatErrors++;
721 /* This may not be fatal since we already wrote an EOF */
722 Jmsg(dcr->jcr, M_ERROR, 0, "%s", dev->errmsg);
725 dev->set_ateot(); /* no more writing this tape */
726 Dmsg1(100, "Leave terminate_writing_volume -- %s\n", ok?"OK":"ERROR");
731 * Do bookkeeping when a new file is created on a Volume. This is
732 * also done for disk files to generate the jobmedia records for
735 static bool do_new_file_bookkeeping(DCR *dcr)
737 DEVICE *dev = dcr->dev;
740 /* Create a JobMedia record so restore can seek */
741 if (!dir_create_jobmedia_record(dcr)) {
742 Dmsg0(190, "Error from create_job_media.\n");
743 dev->dev_errno = EIO;
744 Jmsg(jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
745 dcr->VolCatInfo.VolCatName, jcr->Job);
746 terminate_writing_volume(dcr);
747 dev->dev_errno = EIO;
750 dev->VolCatInfo.VolCatFiles = dev->file;
751 if (!dir_update_volume_info(dcr, false)) {
752 Dmsg0(190, "Error from update_vol_info.\n");
753 terminate_writing_volume(dcr);
754 dev->dev_errno = EIO;
757 Dmsg0(100, "dir_update_volume_info max file size -- OK\n");
760 * Walk through all attached dcrs setting flag to call
761 * set_new_file_parameters() when that dcr is next used.
764 foreach_dlist(mdcr, dev->attached_dcrs) {
765 if (mdcr->jcr->JobId == 0) {
768 mdcr->NewFile = true; /* set reminder to do set_new_file_params */
770 /* Set new file/block parameters for current dcr */
771 set_new_file_parameters(dcr);
776 * Do all checks for DVD sizes during writing.
778 static bool do_dvd_size_checks(DCR *dcr)
780 DEVICE *dev = dcr->dev;
782 DEV_BLOCK *block = dcr->block;
784 /* Limit maximum part size to value specified by user
785 * (not applicable to tapes/fifos)
787 if (!(dev->is_tape() || dev->is_fifo()) && dev->max_part_size > 0 &&
788 (dev->part_size + block->binbuf) >= dev->max_part_size) {
789 if (dev->part < dev->num_parts) {
790 Jmsg3(dcr->jcr, M_FATAL, 0, _("Error while writing, current part number"
791 " is less than the total number of parts (%d/%d, device=%s)\n"),
792 dev->part, dev->num_parts, dev->print_name());
793 dev->dev_errno = EIO;
797 if (open_next_part(dcr) < 0) {
798 Jmsg2(dcr->jcr, M_FATAL, 0, _("Unable to open device next part %s: ERR=%s\n"),
799 dev->print_name(), strerror_dev(dev));
800 dev->dev_errno = EIO;
804 dev->VolCatInfo.VolCatParts = dev->num_parts;
806 if (!dir_update_volume_info(dcr, false)) {
807 Dmsg0(190, "Error from update_vol_info.\n");
808 dev->dev_errno = EIO;
813 if (dev->free_space_errno < 0) { /* Error while getting free space */
814 char ed1[50], ed2[50];
815 Dmsg1(10, "Cannot get free space on the device ERR=%s.\n", dev->errmsg);
816 Jmsg(jcr, M_FATAL, 0, _("End of Volume \"%s\" at %u:%u on device %s "
817 "(part_size=%s, free_space=%s, free_space_errno=%d, errmsg=%s).\n"),
818 dev->VolCatInfo.VolCatName,
819 dev->file, dev->block_num, dev->print_name(),
820 edit_uint64_with_commas(dev->part_size, ed1), edit_uint64_with_commas(dev->free_space, ed2),
821 dev->free_space_errno, dev->errmsg);
822 dev->dev_errno = -dev->free_space_errno;
826 if ((dev->free_space_errno > 0 && (dev->part_size + block->binbuf) >= dev->free_space)) {
827 char ed1[50], ed2[50];
828 Dmsg0(10, "==== Just enough free space on the device to write the current part...\n");
829 Jmsg(jcr, M_INFO, 0, _("End of Volume \"%s\" at %u:%u on device %s "
830 "(part_size=%s, free_space=%s, free_space_errno=%d).\n"),
831 dev->VolCatInfo.VolCatName,
832 dev->file, dev->block_num, dev->print_name(),
833 edit_uint64_with_commas(dev->part_size, ed1), edit_uint64_with_commas(dev->free_space, ed2),
834 dev->free_space_errno);
835 terminate_writing_volume(dcr);
836 dev->dev_errno = ENOSPC;
844 * Read block with locking
847 bool read_block_from_device(DCR *dcr, bool check_block_numbers)
850 DEVICE *dev = dcr->dev;
851 Dmsg0(200, "Enter read_block_from_device\n");
853 ok = read_block_from_dev(dcr, check_block_numbers);
855 Dmsg0(200, "Leave read_block_from_device\n");
860 * Read the next block into the block structure and unserialize
861 * the block header. For a file, the block may be partially
862 * or completely in the current buffer.
864 bool read_block_from_dev(DCR *dcr, bool check_block_numbers)
868 uint32_t BlockNumber;
871 DEVICE *dev = dcr->dev;
872 DEV_BLOCK *block = dcr->block;
878 Dmsg1(200, "Full read() in read_block_from_device() len=%d\n",
882 dev->dev_errno = EIO;
883 Mmsg1(dev->errmsg, _("Block buffer size looping problem on device %s\n"),
885 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
890 /*Dmsg1(100, "dev->file_size=%u\n",(unsigned int)dev->file_size);
891 Dmsg1(100, "dev->file_addr=%u\n",(unsigned int)dev->file_addr);
892 Dmsg1(100, "lseek=%u\n",(unsigned int)lseek(dev->fd, 0, SEEK_CUR));
893 Dmsg1(100, "dev->part_start=%u\n",(unsigned int)dev->part_start);
894 Dmsg1(100, "dev->file_addr-dev->part_start=%u\n",(unsigned int)dev->file_addr-dev->part_start);
895 Dmsg1(100, "dev->file_size-dev->part_start=%u\n",(unsigned int)dev->file_size-dev->part_start);
896 Dmsg1(100, "dev->part_size=%u\n", (unsigned int)dev->part_size);
897 Dmsg1(100, "dev->part=%u\n", (unsigned int)dev->part);
898 Dmsg1(100, "dev->num_parts=%u\n", (unsigned int)dev->num_parts);
899 Dmsg1(100, "dev->VolCatInfo.VolCatParts=%u\n", (unsigned int)dev->VolCatInfo.VolCatParts);
900 Dmsg3(100, "Tests : %d %d %d\n", (dev->VolCatInfo.VolCatParts > 0),
901 ((dev->file_addr-dev->part_start) == dev->part_size),
902 (dev->part <= dev->VolCatInfo.VolCatParts));*/
903 /* Check for part file end */
904 if ((dev->num_parts > 0) &&
905 ((dev->file_addr-dev->part_start) == dev->part_size) &&
906 (dev->part < dev->num_parts)) {
907 if (open_next_part(dcr) < 0) {
908 Jmsg2(dcr->jcr, M_FATAL, 0, _("Unable to open device next part %s: ERR=%s\n"),
909 dev->print_name(), strerror_dev(dev));
910 dev->dev_errno = EIO;
917 // uint32_t *bp = (uint32_t *)block->buf;
918 // Pmsg3(000, "Read %p %u at %llu\n", block->buf, block->buf_len, lseek(dev->fd, 0, SEEK_CUR));
920 stat = read(dev->fd, block->buf, (size_t)block->buf_len);
922 // Pmsg8(000, "stat=%d Csum=%u blen=%u bnum=%u %c%c%c%c\n",stat, bp[0],bp[1],bp[2],
923 // block->buf[12],block->buf[13],block->buf[14],block->buf[15]);
926 dev->VolCatInfo.VolCatErrors++;
928 } while (stat == -1 && (errno == EINTR || errno == EIO) && retry++ < 11);
931 clrerror_dev(dev, -1);
932 Dmsg1(200, "Read device got: ERR=%s\n", be.strerror());
934 Mmsg4(dev->errmsg, _("Read error at file:blk %u:%u on device %s. ERR=%s.\n"),
935 dev->file, dev->block_num, dev->print_name(), be.strerror());
936 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
937 if (dev->at_eof()) { /* EOF just seen? */
938 dev->set_eot(); /* yes, error => EOT */
942 Dmsg3(200, "Read device got %d bytes at %u:%u\n", stat,
943 dev->file, dev->block_num);
944 if (stat == 0) { /* Got EOF ! */
947 Mmsg3(dev->errmsg, _("Read zero bytes at %u:%u on device %s.\n"),
948 dev->file, dev->block_num, dev->print_name());
949 if (dev->at_eof()) { /* EOF already read? */
950 dev->set_eot(); /* yes, 2 EOFs => EOT */
954 return false; /* return eof */
956 /* Continue here for successful read */
957 block->read_len = stat; /* save length read */
958 if (block->read_len < BLKHDR2_LENGTH) {
959 dev->dev_errno = EIO;
960 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Very short block of %d bytes on device %s discarded.\n"),
961 dev->file, dev->block_num, block->read_len, dev->print_name());
962 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
963 dev->set_short_block();
964 block->read_len = block->binbuf = 0;
965 return false; /* return error */
968 BlockNumber = block->BlockNumber + 1;
969 if (!unser_block_header(jcr, dev, block)) {
971 dev->file_addr += block->read_len;
972 dev->file_size += block->read_len;
979 * If the block is bigger than the buffer, we reposition for
980 * re-reading the block, allocate a buffer of the correct size,
983 if (block->block_len > block->buf_len) {
984 dev->dev_errno = EIO;
985 Mmsg2(dev->errmsg, _("Block length %u is greater than buffer %u. Attempting recovery.\n"),
986 block->block_len, block->buf_len);
987 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
988 Pmsg1(000, "%s", dev->errmsg);
989 /* Attempt to reposition to re-read the block */
990 if (dev->is_tape()) {
991 Dmsg0(200, "BSR for reread; block too big for buffer.\n");
992 if (!bsr_dev(dev, 1)) {
993 Jmsg(jcr, M_ERROR, 0, "%s", strerror_dev(dev));
998 Dmsg0(200, "Seek to beginning of block for reread.\n");
999 off_t pos = lseek_dev(dev, (off_t)0, SEEK_CUR); /* get curr pos */
1000 pos -= block->read_len;
1001 lseek_dev(dev, pos, SEEK_SET);
1002 dev->file_addr = pos;
1004 Mmsg1(dev->errmsg, _("Setting block buffer size to %u bytes.\n"), block->block_len);
1005 Jmsg(jcr, M_INFO, 0, "%s", dev->errmsg);
1006 Pmsg1(000, "%s", dev->errmsg);
1007 /* Set new block length */
1008 dev->max_block_size = block->block_len;
1009 block->buf_len = block->block_len;
1010 free_memory(block->buf);
1011 block->buf = get_memory(block->buf_len);
1014 goto reread; /* re-read block with correct block size */
1017 if (block->block_len > block->read_len) {
1018 dev->dev_errno = EIO;
1019 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Short block of %d bytes on device %s discarded.\n"),
1020 dev->file, dev->block_num, block->read_len, dev->print_name());
1021 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
1022 dev->set_short_block();
1023 block->read_len = block->binbuf = 0;
1024 return false; /* return error */
1027 dev->clear_short_block();
1029 dev->VolCatInfo.VolCatReads++;
1030 dev->VolCatInfo.VolCatRBytes += block->read_len;
1032 dev->VolCatInfo.VolCatBytes += block->block_len;
1033 dev->VolCatInfo.VolCatBlocks++;
1034 dev->EndBlock = dev->block_num;
1035 dev->EndFile = dev->file;
1038 /* Update dcr values */
1039 if (dev->is_tape()) {
1040 dcr->EndBlock = dev->EndBlock;
1041 dcr->EndFile = dev->EndFile;
1043 uint64_t addr = dev->file_addr + block->read_len - 1;
1044 dcr->EndBlock = (uint32_t)addr;
1045 dcr->EndFile = (uint32_t)(addr >> 32);
1046 dev->block_num = dcr->EndBlock;
1047 dev->file = dcr->EndFile;
1049 dev->file_addr += block->read_len;
1050 dev->file_size += block->read_len;
1053 * If we read a short block on disk,
1054 * seek to beginning of next block. This saves us
1055 * from shuffling blocks around in the buffer. Take a
1056 * look at this from an efficiency stand point later, but
1057 * it should only happen once at the end of each job.
1059 * I've been lseek()ing negative relative to SEEK_CUR for 30
1060 * years now. However, it seems that with the new off_t definition,
1061 * it is not possible to seek negative amounts, so we use two
1062 * lseek(). One to get the position, then the second to do an
1063 * absolute positioning -- so much for efficiency. KES Sep 02.
1065 Dmsg0(200, "At end of read block\n");
1066 if (block->read_len > block->block_len && !dev->is_tape()) {
1068 off_t pos = lseek_dev(dev, (off_t)0, SEEK_CUR); /* get curr pos */
1069 pos -= (block->read_len - block->block_len);
1070 lseek_dev(dev, pos, SEEK_SET);
1071 Dmsg3(200, "Did lseek pos=%s blk_size=%d rdlen=%d\n",
1072 edit_uint64(pos, ed1), block->block_len,
1074 dev->file_addr = pos;
1075 dev->file_size = pos;
1077 Dmsg2(200, "Exit read_block read_len=%d block_len=%d\n",
1078 block->read_len, block->block_len);
1079 block->block_read = true;