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"));
512 * Do write here, make a somewhat feeble attempt to recover from
513 * I/O errors, or from the OS telling us it is busy.
518 if ((retry > 0 && stat == -1 && errno == EBUSY) || retry > 10) {
520 Dmsg4(100, "===== retry=%d stat=%d errno=%d: ERR=%s\n",
521 retry, stat, errno, be.strerror());
522 bmicrosleep(0, 50000); /* pause a bit if busy or lots of errors */
524 if (dev->is_tape()) {
525 stat = tape_write(dev->fd, block->buf, (size_t)wlen);
527 stat = write(dev->fd, block->buf, (size_t)wlen);
529 } while (stat == -1 && (errno == EBUSY || errno == EIO) && retry++ < 30);
531 #ifdef DEBUG_BLOCK_ZEROING
532 if (bp[0] == 0 && bp[1] == 0 && bp[2] == 0 && block->buf[12] == 0) {
533 Jmsg0(jcr, M_ABORT, 0, _("Write block header zeroed.\n"));
537 if (stat != (ssize_t)wlen) {
538 /* Some devices simply report EIO when the volume is full.
539 * With a little more thought we may be able to check
540 * capacity and distinguish real errors and EOT
541 * conditions. In any case, we probably want to
542 * simulate an End of Medium.
547 if (dev->dev_errno == 0) {
548 dev->dev_errno = ENOSPC; /* out of space */
550 if (dev->dev_errno != ENOSPC) {
551 dev->VolCatInfo.VolCatErrors++;
552 Jmsg4(jcr, M_ERROR, 0, _("Write error at %u:%u on device %s. ERR=%s.\n"),
553 dev->file, dev->block_num, dev->print_name(), be.strerror());
556 dev->dev_errno = ENOSPC; /* out of space */
558 if (dev->dev_errno == ENOSPC) {
559 Jmsg(jcr, M_INFO, 0, _("End of Volume \"%s\" at %u:%u on device %s. Write of %u bytes got %d.\n"),
560 dev->VolCatInfo.VolCatName,
561 dev->file, dev->block_num, dev->print_name(), wlen, stat);
563 Dmsg7(100, "=== Write error. fd=%d size=%u rtn=%d dev_blk=%d blk_blk=%d errno=%d: ERR=%s\n",
564 dev->fd, wlen, stat, dev->block_num, block->BlockNumber,
565 dev->dev_errno, strerror(dev->dev_errno));
567 ok = terminate_writing_volume(dcr);
568 if (!ok && !forge_on) {
572 reread_last_block(dcr);
577 /* We successfully wrote the block, now do housekeeping */
578 Dmsg2(1300, "VolCatBytes=%d newVolCatBytes=%d\n", (int)dev->VolCatInfo.VolCatBytes,
579 (int)(dev->VolCatInfo.VolCatBytes+wlen));
580 dev->VolCatInfo.VolCatBytes += wlen;
581 dev->VolCatInfo.VolCatBlocks++;
582 dev->EndBlock = dev->block_num;
583 dev->EndFile = dev->file;
584 block->BlockNumber++;
586 /* Update dcr values */
587 if (dev->is_tape()) {
588 dcr->EndBlock = dev->EndBlock;
589 dcr->EndFile = dev->EndFile;
592 /* Save address of block just written */
593 uint64_t addr = dev->file_addr + wlen - 1;
594 dcr->EndBlock = (uint32_t)addr;
595 dcr->EndFile = (uint32_t)(addr >> 32);
596 dev->block_num = dcr->EndBlock;
597 dev->file = dcr->EndFile;
599 if (dcr->VolFirstIndex == 0 && block->FirstIndex > 0) {
600 dcr->VolFirstIndex = block->FirstIndex;
602 if (block->LastIndex > 0) {
603 dcr->VolLastIndex = block->LastIndex;
605 dcr->WroteVol = true;
606 dev->file_addr += wlen; /* update file address */
607 dev->file_size += wlen;
608 dev->part_size += wlen;
610 Dmsg2(1300, "write_block: wrote block %d bytes=%d\n", dev->block_num, wlen);
615 static void reread_last_block(DCR *dcr)
617 #define CHECK_LAST_BLOCK
618 #ifdef CHECK_LAST_BLOCK
620 DEVICE *dev = dcr->dev;
622 DEV_BLOCK *block = dcr->block;
624 * If the device is a tape and it supports backspace record,
625 * we backspace over one or two eof marks depending on
626 * how many we just wrote, then over the last record,
627 * then re-read it and verify that the block number is
630 if (dev->is_tape() && dev_cap(dev, CAP_BSR)) {
631 /* Now back up over what we wrote and read the last block */
635 Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"),
636 be.strerror(dev->dev_errno));
638 if (ok && dev->has_cap(CAP_TWOEOF) && !dev->bsf(1)) {
641 Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"),
642 be.strerror(dev->dev_errno));
644 /* Backspace over record */
645 if (ok && !dev->bsr(1)) {
648 Jmsg(jcr, M_ERROR, 0, _("Backspace record at EOT failed. ERR=%s\n"),
649 be.strerror(dev->dev_errno));
651 * On FreeBSD systems, if the user got here, it is likely that his/her
652 * tape drive is "frozen". The correct thing to do is a
653 * rewind(), but if we do that, higher levels in cleaning up, will
654 * most likely write the EOS record over the beginning of the
655 * tape. The rewind *is* done later in mount.c when another
656 * tape is requested. Note, the clrerror() call in bsr()
657 * calls ioctl(MTCERRSTAT), which *should* fix the problem.
661 DEV_BLOCK *lblock = new_block(dev);
662 /* Note, this can destroy dev->errmsg */
664 if (!read_block_from_dev(dcr, NO_BLOCK_NUMBER_CHECK)) {
665 Jmsg(jcr, M_ERROR, 0, _("Re-read last block at EOT failed. ERR=%s"),
669 * If we wrote block and the block numbers don't agree
670 * we have a possible problem.
672 if (lblock->VolSessionId == block->VolSessionId &&
673 lblock->BlockNumber+1 != block->BlockNumber) {
674 Jmsg(jcr, M_ERROR, 0, _(
675 "Re-read of last block OK, but block numbers differ. Last block=%u Current block=%u.\n"),
676 lblock->BlockNumber, block->BlockNumber);
678 Jmsg(jcr, M_INFO, 0, _("Re-read of last block succeeded.\n"));
688 static bool terminate_writing_volume(DCR *dcr)
690 DEVICE *dev = dcr->dev;
693 /* Create a JobMedia record to indicated end of tape */
694 dev->VolCatInfo.VolCatFiles = dev->file;
695 if (!dir_create_jobmedia_record(dcr)) {
696 Dmsg0(190, "Error from create JobMedia\n");
697 dev->dev_errno = EIO;
698 Jmsg(dcr->jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
699 dcr->VolCatInfo.VolCatName, dcr->jcr->Job);
703 dcr->block->write_failed = true;
704 if (!dev->weof(1)) { /* end the tape */
705 dev->VolCatInfo.VolCatErrors++;
706 Jmsg(dcr->jcr, M_ERROR, 0, _("Error writing final EOF to tape. This Volume may not be readable.\n"
709 Dmsg0(100, "WEOF error.\n");
712 ok = write_ansi_ibm_labels(dcr, ANSI_EOV_LABEL, dev->VolHdr.VolumeName);
714 bstrncpy(dev->VolCatInfo.VolCatStatus, "Full", sizeof(dev->VolCatInfo.VolCatStatus));
715 dev->VolCatInfo.VolCatFiles = dev->file; /* set number of files */
716 dev->VolCatInfo.VolCatJobs++; /* increment number of jobs */
719 if (!dvd_write_part(dcr)) { /* write last part */
720 dev->VolCatInfo.VolCatErrors++;
721 Jmsg(dcr->jcr, M_FATAL, 0, _("Error writing final part to DVD. "
722 "This Volume may not be readable.\n%s"),
725 Dmsg0(100, "dvd_write_part error.\n");
727 dev->VolCatInfo.VolCatParts = dev->num_dvd_parts;
730 if (!dir_update_volume_info(dcr, false)) {
733 Dmsg1(100, "dir_update_volume_info terminate writing -- %s\n", ok?"OK":"ERROR");
736 * Walk through all attached dcrs setting flag to call
737 * set_new_file_parameters() when that dcr is next used.
740 foreach_dlist(mdcr, dev->attached_dcrs) {
741 if (mdcr->jcr->JobId == 0) {
744 mdcr->NewFile = true; /* set reminder to do set_new_file_params */
746 /* Set new file/block parameters for current dcr */
747 set_new_file_parameters(dcr);
749 if (ok && dev_cap(dev, CAP_TWOEOF) && !dev->weof(1)) { /* end the tape */
750 dev->VolCatInfo.VolCatErrors++;
751 /* This may not be fatal since we already wrote an EOF */
752 Jmsg(dcr->jcr, M_ERROR, 0, "%s", dev->errmsg);
755 dev->set_ateot(); /* no more writing this tape */
756 Dmsg1(100, "Leave terminate_writing_volume -- %s\n", ok?"OK":"ERROR");
761 * Do bookkeeping when a new file is created on a Volume. This is
762 * also done for disk files to generate the jobmedia records for
765 static bool do_new_file_bookkeeping(DCR *dcr)
767 DEVICE *dev = dcr->dev;
770 /* Create a JobMedia record so restore can seek */
771 if (!dir_create_jobmedia_record(dcr)) {
772 Dmsg0(190, "Error from create_job_media.\n");
773 dev->dev_errno = EIO;
774 Jmsg(jcr, M_FATAL, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
775 dcr->VolCatInfo.VolCatName, jcr->Job);
776 terminate_writing_volume(dcr);
777 dev->dev_errno = EIO;
780 dev->VolCatInfo.VolCatFiles = dev->file;
781 if (!dir_update_volume_info(dcr, false)) {
782 Dmsg0(190, "Error from update_vol_info.\n");
783 terminate_writing_volume(dcr);
784 dev->dev_errno = EIO;
787 Dmsg0(100, "dir_update_volume_info max file size -- OK\n");
790 * Walk through all attached dcrs setting flag to call
791 * set_new_file_parameters() when that dcr is next used.
794 foreach_dlist(mdcr, dev->attached_dcrs) {
795 if (mdcr->jcr->JobId == 0) {
798 mdcr->NewFile = true; /* set reminder to do set_new_file_params */
800 /* Set new file/block parameters for current dcr */
801 set_new_file_parameters(dcr);
806 * Do all checks for DVD sizes during writing.
808 static bool do_dvd_size_checks(DCR *dcr)
810 DEVICE *dev = dcr->dev;
812 DEV_BLOCK *block = dcr->block;
814 /* Don't go further if the device is not a dvd */
815 if (!dev->is_dvd()) {
819 /* Limit maximum part size to value specified by user
821 if (dev->max_part_size > 0 && ((dev->part_size + block->binbuf) >= dev->max_part_size)) {
822 if (dev->part < dev->num_dvd_parts) {
823 Jmsg3(dcr->jcr, M_FATAL, 0, _("Error while writing, current part number"
824 " is less than the total number of parts (%d/%d, device=%s)\n"),
825 dev->part, dev->num_dvd_parts, dev->print_name());
826 dev->dev_errno = EIO;
830 if (dvd_open_next_part(dcr) < 0) {
831 Jmsg2(dcr->jcr, M_FATAL, 0, _("Unable to open device next part %s: ERR=%s\n"),
832 dev->print_name(), dev->bstrerror());
833 dev->dev_errno = EIO;
837 dev->VolCatInfo.VolCatParts = dev->num_dvd_parts;
839 if (!dir_update_volume_info(dcr, false)) {
840 Dmsg0(190, "Error from update_vol_info.\n");
841 dev->dev_errno = EIO;
846 if (!dev->is_freespace_ok()) {
847 update_free_space_dev(dev);
850 if (!dev->is_freespace_ok()) { /* Error while getting free space */
851 char ed1[50], ed2[50];
852 Dmsg1(10, "Cannot get free space on the device ERR=%s.\n", dev->errmsg);
853 Jmsg(jcr, M_FATAL, 0, _("End of Volume \"%s\" at %u:%u on device %s "
854 "(part_size=%s, free_space=%s, free_space_errno=%d, errmsg=%s).\n"),
855 dev->VolCatInfo.VolCatName,
856 dev->file, dev->block_num, dev->print_name(),
857 edit_uint64_with_commas(dev->part_size, ed1), edit_uint64_with_commas(dev->free_space, ed2),
858 dev->free_space_errno, dev->errmsg);
859 dev->dev_errno = dev->free_space_errno;
863 if ((dev->is_freespace_ok() && (dev->part_size + block->binbuf) >= dev->free_space)) {
864 char ed1[50], ed2[50];
865 Dmsg0(10, "==== Just enough free space on the device to write the current part...\n");
866 Jmsg(jcr, M_INFO, 0, _("End of Volume \"%s\" at %u:%u on device %s "
867 "(part_size=%s, free_space=%s, free_space_errno=%d).\n"),
868 dev->VolCatInfo.VolCatName,
869 dev->file, dev->block_num, dev->print_name(),
870 edit_uint64_with_commas(dev->part_size, ed1), edit_uint64_with_commas(dev->free_space, ed2),
871 dev->free_space_errno);
872 terminate_writing_volume(dcr);
873 dev->dev_errno = ENOSPC;
881 * Read block with locking
884 bool read_block_from_device(DCR *dcr, bool check_block_numbers)
887 DEVICE *dev = dcr->dev;
888 Dmsg0(200, "Enter read_block_from_device\n");
890 ok = read_block_from_dev(dcr, check_block_numbers);
892 Dmsg0(200, "Leave read_block_from_device\n");
897 * Read the next block into the block structure and unserialize
898 * the block header. For a file, the block may be partially
899 * or completely in the current buffer.
901 bool read_block_from_dev(DCR *dcr, bool check_block_numbers)
905 uint32_t BlockNumber;
908 DEVICE *dev = dcr->dev;
909 DEV_BLOCK *block = dcr->block;
915 Dmsg1(200, "Full read in read_block_from_device() len=%d\n",
919 dev->dev_errno = EIO;
920 Mmsg1(dev->errmsg, _("Block buffer size looping problem on device %s\n"),
922 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
927 #define lots_of_debug
929 if (dev->at_eof() && dev->is_dvd()) {
930 Dmsg1(100, "file_size=%u\n",(unsigned int)dev->file_size);
931 Dmsg1(100, "file_addr=%u\n",(unsigned int)dev->file_addr);
932 Dmsg1(100, "lseek=%u\n",(unsigned int)lseek(dev->fd, 0, SEEK_CUR));
933 Dmsg1(100, "part_start=%u\n",(unsigned int)dev->part_start);
934 Dmsg1(100, "part_size=%u\n", (unsigned int)dev->part_size);
935 Dmsg2(100, "part=%u num_dvd_parts=%u\n", dev->part, dev->num_dvd_parts);
936 Dmsg1(100, "VolCatInfo.VolCatParts=%u\n", (unsigned int)dev->VolCatInfo.VolCatParts);
937 Dmsg3(100, "Tests : %d %d %d\n", (dev->VolCatInfo.VolCatParts > 0),
938 ((dev->file_addr-dev->part_start) == dev->part_size),
939 (dev->part <= dev->VolCatInfo.VolCatParts));
943 /* Check for DVD part file end */
944 if (dev->at_eof() && dev->is_dvd() && dev->num_dvd_parts > 0 &&
945 dev->part <= dev->num_dvd_parts) {
946 Dmsg0(400, "Call dvd_open_next_part\n");
947 if (dvd_open_next_part(dcr) < 0) {
948 Jmsg3(dcr->jcr, M_FATAL, 0, _("Unable to open device part=%d %s: ERR=%s\n"),
949 dev->part, dev->print_name(), dev->bstrerror());
950 dev->dev_errno = EIO;
959 if ((retry > 0 && stat == -1 && errno == EBUSY) || retry > 10) {
961 Dmsg4(100, "===== retry=%d stat=%d errno=%d: ERR=%s\n",
962 retry, stat, errno, be.strerror());
963 bmicrosleep(0, 50000); /* pause a bit if busy or lots of errors */
965 if (dev->is_tape()) {
966 stat = tape_read(dev->fd, block->buf, (size_t)block->buf_len);
968 stat = read(dev->fd, block->buf, (size_t)block->buf_len);
970 } while (stat == -1 && (errno == EBUSY || errno == EINTR || errno == EIO) && retry++ < 30);
973 dev->VolCatInfo.VolCatErrors++;
975 Dmsg1(200, "Read device got: ERR=%s\n", be.strerror());
977 Mmsg4(dev->errmsg, _("Read error at file:blk %u:%u on device %s. ERR=%s.\n"),
978 dev->file, dev->block_num, dev->print_name(), be.strerror());
979 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
980 if (dev->at_eof()) { /* EOF just seen? */
981 dev->set_eot(); /* yes, error => EOT */
985 Dmsg3(200, "Read device got %d bytes at %u:%u\n", stat,
986 dev->file, dev->block_num);
987 if (stat == 0) { /* Got EOF ! */
990 Mmsg3(dev->errmsg, _("Read zero bytes at %u:%u on device %s.\n"),
991 dev->file, dev->block_num, dev->print_name());
992 if (dev->at_eof()) { /* EOF already read? */
993 dev->set_eot(); /* yes, 2 EOFs => EOT */
997 return false; /* return eof */
999 /* Continue here for successful read */
1000 block->read_len = stat; /* save length read */
1001 if (block->read_len < BLKHDR2_LENGTH) {
1002 dev->dev_errno = EIO;
1003 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Very short block of %d bytes on device %s discarded.\n"),
1004 dev->file, dev->block_num, block->read_len, dev->print_name());
1005 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
1006 dev->set_short_block();
1007 block->read_len = block->binbuf = 0;
1008 return false; /* return error */
1011 BlockNumber = block->BlockNumber + 1;
1012 if (!unser_block_header(jcr, dev, block)) {
1014 dev->file_addr += block->read_len;
1015 dev->file_size += block->read_len;
1022 * If the block is bigger than the buffer, we reposition for
1023 * re-reading the block, allocate a buffer of the correct size,
1026 if (block->block_len > block->buf_len) {
1027 dev->dev_errno = EIO;
1028 Mmsg2(dev->errmsg, _("Block length %u is greater than buffer %u. Attempting recovery.\n"),
1029 block->block_len, block->buf_len);
1030 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
1031 Pmsg1(000, "%s", dev->errmsg);
1032 /* Attempt to reposition to re-read the block */
1033 if (dev->is_tape()) {
1034 Dmsg0(200, "BSR for reread; block too big for buffer.\n");
1036 Jmsg(jcr, M_ERROR, 0, "%s", dev->bstrerror());
1037 block->read_len = 0;
1041 Dmsg0(200, "Seek to beginning of block for reread.\n");
1042 off_t pos = dev->lseek(dcr, (off_t)0, SEEK_CUR); /* get curr pos */
1043 pos -= block->read_len;
1044 dev->lseek(dcr, pos, SEEK_SET);
1045 dev->file_addr = pos;
1047 Mmsg1(dev->errmsg, _("Setting block buffer size to %u bytes.\n"), block->block_len);
1048 Jmsg(jcr, M_INFO, 0, "%s", dev->errmsg);
1049 Pmsg1(000, "%s", dev->errmsg);
1050 /* Set new block length */
1051 dev->max_block_size = block->block_len;
1052 block->buf_len = block->block_len;
1053 free_memory(block->buf);
1054 block->buf = get_memory(block->buf_len);
1057 goto reread; /* re-read block with correct block size */
1060 if (block->block_len > block->read_len) {
1061 dev->dev_errno = EIO;
1062 Mmsg4(dev->errmsg, _("Volume data error at %u:%u! Short block of %d bytes on device %s discarded.\n"),
1063 dev->file, dev->block_num, block->read_len, dev->print_name());
1064 Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
1065 dev->set_short_block();
1066 block->read_len = block->binbuf = 0;
1067 return false; /* return error */
1070 dev->clear_short_block();
1072 dev->VolCatInfo.VolCatReads++;
1073 dev->VolCatInfo.VolCatRBytes += block->read_len;
1075 dev->VolCatInfo.VolCatBytes += block->block_len;
1076 dev->VolCatInfo.VolCatBlocks++;
1077 if (dev->VolCatInfo.VolFirstWritten == 0) {
1078 dev->VolCatInfo.VolFirstWritten = time(NULL); /* Set first written time */
1080 dev->EndBlock = dev->block_num;
1081 dev->EndFile = dev->file;
1084 /* Update dcr values */
1085 if (dev->is_tape()) {
1086 dcr->EndBlock = dev->EndBlock;
1087 dcr->EndFile = dev->EndFile;
1089 uint64_t addr = dev->file_addr + block->read_len - 1;
1090 dcr->EndBlock = (uint32_t)addr;
1091 dcr->EndFile = (uint32_t)(addr >> 32);
1092 dev->block_num = dcr->EndBlock;
1093 dev->file = dcr->EndFile;
1095 dev->file_addr += block->read_len;
1096 dev->file_size += block->read_len;
1099 * If we read a short block on disk,
1100 * seek to beginning of next block. This saves us
1101 * from shuffling blocks around in the buffer. Take a
1102 * look at this from an efficiency stand point later, but
1103 * it should only happen once at the end of each job.
1105 * I've been lseek()ing negative relative to SEEK_CUR for 30
1106 * years now. However, it seems that with the new off_t definition,
1107 * it is not possible to seek negative amounts, so we use two
1108 * lseek(). One to get the position, then the second to do an
1109 * absolute positioning -- so much for efficiency. KES Sep 02.
1111 Dmsg0(200, "At end of read block\n");
1112 if (block->read_len > block->block_len && !dev->is_tape()) {
1114 off_t pos = dev->lseek(dcr, (off_t)0, SEEK_CUR); /* get curr pos */
1115 Dmsg1(200, "Current lseek pos=%s\n", edit_int64(pos, ed1));
1116 pos -= (block->read_len - block->block_len);
1117 dev->lseek(dcr, pos, SEEK_SET);
1118 Dmsg3(200, "Did lseek pos=%s blk_size=%d rdlen=%d\n",
1119 edit_int64(pos, ed1), block->block_len,
1121 dev->file_addr = pos;
1122 dev->file_size = pos;
1124 Dmsg2(200, "Exit read_block read_len=%d block_len=%d\n",
1125 block->read_len, block->block_len);
1126 block->block_read = true;