* block.c -- tape block handling functions
*
* Kern Sibbald, March MMI
+ * added BB02 format October MMII
*
* Version $Id$
*
*/
/*
- Copyright (C) 2000, 2001, 2002 Kern Sibbald and John Walker
+ Copyright (C) 2000-2003 Kern Sibbald and John Walker
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
uint32_t VolSessionId, VolSessionTime, data_len;
int32_t FileIndex;
int32_t Stream;
+ int bhl, rhl;
- unser_begin(b->buf, BLKHDR_LENGTH);
+ unser_begin(b->buf, BLKHDR1_LENGTH);
unser_uint32(CheckSum);
unser_uint32(block_len);
unser_uint32(BlockNumber);
unser_bytes(Id, BLKHDR_ID_LENGTH);
- ASSERT(unser_length(b->buf) == BLKHDR_LENGTH);
+ ASSERT(unser_length(b->buf) == BLKHDR1_LENGTH);
Id[BLKHDR_ID_LENGTH] = 0;
+ if (Id[3] == '2') {
+ unser_uint32(VolSessionId);
+ unser_uint32(VolSessionTime);
+ bhl = BLKHDR2_LENGTH;
+ rhl = RECHDR2_LENGTH;
+ } else {
+ VolSessionId = VolSessionTime = 0;
+ bhl = BLKHDR1_LENGTH;
+ rhl = RECHDR1_LENGTH;
+ }
if (block_len > 100000) {
- Dmsg3(20, "Dump block %s %s blocksize too big %d\n", msg, b, block_len);
+ Dmsg3(20, "Dump block %s 0x%x blocksize too big %u\n", msg, b, block_len);
return;
}
BlockCheckSum = bcrc32((uint8_t *)b->buf+BLKHDR_CS_LENGTH,
block_len-BLKHDR_CS_LENGTH);
- Dmsg6(10, "Dump block %s %x: size=%d BlkNum=%d\n\
+ Pmsg6(000, "Dump block %s %x: size=%d BlkNum=%d\n\
Hdrcksum=%x cksum=%x\n",
msg, b, block_len, BlockNumber, CheckSum, BlockCheckSum);
- p = b->buf + BLKHDR_LENGTH;
- while (p < (b->buf + block_len+RECHDR_LENGTH)) {
- unser_begin(p, RECHDR_LENGTH);
- unser_uint32(VolSessionId);
- unser_uint32(VolSessionTime);
+ p = b->buf + bhl;
+ while (p < (b->buf + block_len+WRITE_RECHDR_LENGTH)) {
+ unser_begin(p, WRITE_RECHDR_LENGTH);
+ if (rhl == RECHDR1_LENGTH) {
+ unser_uint32(VolSessionId);
+ unser_uint32(VolSessionTime);
+ }
unser_int32(FileIndex);
unser_int32(Stream);
unser_uint32(data_len);
- Dmsg6(10, "Rec: VId=%d VT=%d FI=%s Strm=%s len=%d p=%x\n",
- VolSessionId, VolSessionTime, FI_to_ascii(FileIndex), stream_to_ascii(Stream),
- data_len, p);
- p += data_len + RECHDR_LENGTH;
+ Pmsg6(000, " Rec: VId=%u VT=%u FI=%s Strm=%s len=%d p=%x\n",
+ VolSessionId, VolSessionTime, FI_to_ascii(FileIndex),
+ stream_to_ascii(Stream, FileIndex), data_len, p);
+ p += data_len + rhl;
}
-
}
/*
memset(block, 0, sizeof(DEV_BLOCK));
+ /* If the user has specified a max_block_size, use it as the default */
if (dev->max_block_size == 0) {
block->buf_len = DEFAULT_BLOCK_SIZE;
} else {
block->buf_len = dev->max_block_size;
}
- if (block->buf_len % TAPE_BSIZE != 0) {
- Mmsg2(&dev->errmsg, _("Block size %d forced to be multiple of %d\n"),
- block->buf_len, TAPE_BSIZE);
- Emsg0(M_WARNING, 0, dev->errmsg);
- block->buf_len = ((block->buf_len + TAPE_BSIZE - 1) / TAPE_BSIZE) * TAPE_BSIZE;
- }
+ block->dev = dev;
block->block_len = block->buf_len; /* default block size */
block->buf = get_memory(block->buf_len);
if (block->buf == NULL) {
return NULL;
}
empty_block(block);
+ block->BlockVer = BLOCK_VER; /* default write version */
Dmsg1(90, "Returning new block=%x\n", block);
return block;
}
+/*
+ * Only the first block checksum error was reported.
+ * If there are more, report it now.
+ */
+void print_block_read_errors(JCR *jcr, DEV_BLOCK *block)
+{
+ if (block->read_errors > 1) {
+ Jmsg(jcr, M_ERROR, 0, _("%d block read errors ignored.\n"),
+ block->read_errors);
+ }
+}
+
/*
* Free block
*/
/* Empty the block -- for writing */
void empty_block(DEV_BLOCK *block)
{
- block->binbuf = BLKHDR_LENGTH;
+ block->binbuf = WRITE_BLKHDR_LENGTH;
block->bufp = block->buf + block->binbuf;
block->read_len = 0;
- block->failed_write = FALSE;
+ block->write_failed = false;
+ block->block_read = false;
+ block->FirstIndex = block->LastIndex = 0;
}
/*
uint32_t block_len = block->binbuf;
Dmsg1(190, "ser_block_header: block_len=%d\n", block_len);
- ser_begin(block->buf, BLKHDR_LENGTH);
+ ser_begin(block->buf, BLKHDR2_LENGTH);
ser_uint32(CheckSum);
ser_uint32(block_len);
ser_uint32(block->BlockNumber);
- ser_bytes(BLKHDR_ID, BLKHDR_ID_LENGTH);
- ASSERT(ser_length(block->buf) == BLKHDR_LENGTH);
+ ser_bytes(WRITE_BLKHDR_ID, BLKHDR_ID_LENGTH);
+ if (BLOCK_VER >= 2) {
+ ser_uint32(block->VolSessionId);
+ ser_uint32(block->VolSessionTime);
+ }
/* Checksum whole block except for the checksum */
CheckSum = bcrc32((uint8_t *)block->buf+BLKHDR_CS_LENGTH,
block_len-BLKHDR_CS_LENGTH);
Dmsg1(190, "ser_bloc_header: checksum=%x\n", CheckSum);
- ser_begin(block->buf, BLKHDR_LENGTH);
- ser_uint32(CheckSum);
+ ser_begin(block->buf, BLKHDR2_LENGTH);
+ ser_uint32(CheckSum); /* now add checksum to block header */
}
/*
- * Unserialized the block header for reading block.
+ * Unserialize the block header for reading block.
* This includes setting all the buffer pointers correctly.
*
* Returns: 0 on failure (not a block)
* 1 on success
*/
-static int unser_block_header(DEVICE *dev, DEV_BLOCK *block)
+static int unser_block_header(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
{
ser_declare;
char Id[BLKHDR_ID_LENGTH+1];
uint32_t CheckSum, BlockCheckSum;
uint32_t block_len;
- uint32_t EndBlock;
+ uint32_t block_end;
uint32_t BlockNumber;
+ int bhl;
unser_begin(block->buf, BLKHDR_LENGTH);
unser_uint32(CheckSum);
unser_uint32(block_len);
unser_uint32(BlockNumber);
unser_bytes(Id, BLKHDR_ID_LENGTH);
- ASSERT(unser_length(block->buf) == BLKHDR_LENGTH);
+ ASSERT(unser_length(block->buf) == BLKHDR1_LENGTH);
Id[BLKHDR_ID_LENGTH] = 0;
- block->bufp = block->buf + BLKHDR_LENGTH;
- if (strncmp(Id, BLKHDR_ID, BLKHDR_ID_LENGTH) != 0) {
- Mmsg2(&dev->errmsg, _("Buffer ID error. Wanted: %s, got %s. Buffer discarded.\n"),
- BLKHDR_ID, Id);
- Emsg0(M_ERROR, 0, dev->errmsg);
+ if (Id[3] == '1') {
+ bhl = BLKHDR1_LENGTH;
+ block->BlockVer = 1;
+ block->bufp = block->buf + bhl;
+ if (strncmp(Id, BLKHDR1_ID, BLKHDR_ID_LENGTH) != 0) {
+ Mmsg2(&dev->errmsg, _("Buffer ID error. Wanted: %s, got %s. Buffer discarded.\n"),
+ BLKHDR1_ID, Id);
+ if (block->read_errors == 0 || verbose >= 2) {
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ block->read_errors++;
+ return 0;
+ }
+ } else if (Id[3] == '2') {
+ unser_uint32(block->VolSessionId);
+ unser_uint32(block->VolSessionTime);
+ bhl = BLKHDR2_LENGTH;
+ block->BlockVer = 2;
+ block->bufp = block->buf + bhl;
+ if (strncmp(Id, BLKHDR2_ID, BLKHDR_ID_LENGTH) != 0) {
+ Mmsg2(&dev->errmsg, _("Buffer ID error. Wanted: %s, got %s. Buffer discarded.\n"),
+ BLKHDR2_ID, Id);
+ if (block->read_errors == 0 || verbose >= 2) {
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ block->read_errors++;
+ return 0;
+ }
+ } else {
+ Mmsg1(&dev->errmsg, _("Expected block-id BB01 or BB02, got %s. Buffer discarded.\n"), Id);
+ if (block->read_errors == 0 || verbose >= 2) {
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ block->read_errors++;
return 0;
}
- ASSERT(block_len < MAX_BLOCK_LENGTH); /* temp sanity check */
+ /* Sanity check */
+ if (block_len > MAX_BLOCK_LENGTH) {
+ Mmsg1(&dev->errmsg, _("Block length %u is insane (too large), probably due to a bad archive.\n"),
+ block_len);
+ if (block->read_errors == 0 || verbose >= 2) {
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ block->read_errors++;
+ return 0;
+ }
Dmsg1(190, "unser_block_header block_len=%d\n", block_len);
/* Find end of block or end of buffer whichever is smaller */
if (block_len > block->read_len) {
- EndBlock = block->read_len;
+ block_end = block->read_len;
} else {
- EndBlock = block_len;
+ block_end = block_len;
}
- block->binbuf = EndBlock - BLKHDR_LENGTH;
+ block->binbuf = block_end - bhl;
block->block_len = block_len;
block->BlockNumber = BlockNumber;
Dmsg3(190, "Read binbuf = %d %d block_len=%d\n", block->binbuf,
- BLKHDR_LENGTH, block_len);
- if (block_len > block->buf_len) {
- Mmsg2(&dev->errmsg, _("Block length %d is greater than buffer %d\n"),
- block_len, block->buf_len);
- Emsg0(M_ERROR, 0, dev->errmsg);
- return 0;
- }
+ bhl, block_len);
if (block_len <= block->read_len) {
BlockCheckSum = bcrc32((uint8_t *)block->buf+BLKHDR_CS_LENGTH,
block_len-BLKHDR_CS_LENGTH);
if (BlockCheckSum != CheckSum) {
- Dmsg2(00, "Block checksum mismatch: calc=%x blk=%x\n", BlockCheckSum,
- CheckSum);
- Mmsg2(&dev->errmsg, _("Block checksum mismatch: calc=%x blk=%x\n"), BlockCheckSum,
- CheckSum);
+ Mmsg3(&dev->errmsg, _("Block checksum mismatch in block %u: calc=%x blk=%x\n"),
+ (unsigned)BlockNumber, BlockCheckSum, CheckSum);
+ if (block->read_errors == 0 || verbose >= 2) {
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ block->read_errors++;
return 0;
}
}
{
int stat = 1;
lock_device(dev);
- if (!write_block_to_dev(dev, block)) {
+
+ /*
+ * If a new volume has been mounted since our last write
+ * Create a JobMedia record for the previous volume written,
+ * and set new parameters to write this volume
+ * The saem applies for if we are in a new file.
+ */
+ if (jcr->NewVol || jcr->NewFile) {
+ /* Create a jobmedia record for this job */
+ if (!dir_create_jobmedia_record(jcr)) {
+ Jmsg(jcr, M_ERROR, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
+ jcr->VolCatInfo.VolCatName, jcr->Job);
+ set_new_volume_parameters(jcr, dev);
+ unlock_device(dev);
+ return 0;
+ }
+ if (jcr->NewVol) {
+ /* Note, setting a new volume also handles any pending new file */
+ set_new_volume_parameters(jcr, dev);
+ jcr->NewFile = false; /* this handled for new file too */
+ } else {
+ set_new_file_parameters(jcr, dev);
+ }
+ }
+
+ if (!write_block_to_dev(jcr, dev, block)) {
stat = fixup_device_block_write_error(jcr, dev, block);
}
+
unlock_device(dev);
return stat;
}
* Returns: 1 on success or EOT
* 0 on hard error
*/
-int write_block_to_dev(DEVICE *dev, DEV_BLOCK *block)
+int write_block_to_dev(JCR *jcr, DEVICE *dev, DEV_BLOCK *block)
{
- int stat = 0;
+ ssize_t stat = 0;
uint32_t wlen; /* length to write */
+ int hit_max1, hit_max2;
+ bool ok;
+#ifdef NO_TAPE_WRITE_TEST
+ empty_block(block);
+ return 1;
+#endif
ASSERT(block->binbuf == ((uint32_t) (block->bufp - block->buf)));
/* dump_block(block, "before write"); */
if (dev->state & ST_WEOT) {
- Dmsg0(90, "return write_block_to_dev with ST_WEOT\n");
+ Dmsg0(100, "return write_block_to_dev with ST_WEOT\n");
+ Jmsg(jcr, M_FATAL, 0, _("Cannot write block. Device at EOM.\n"));
return 0;
}
wlen = block->binbuf;
- if (wlen <= BLKHDR_LENGTH) { /* Does block have data in it? */
- Dmsg0(190, "return write_block_to_dev no data to write\n");
+ if (wlen <= WRITE_BLKHDR_LENGTH) { /* Does block have data in it? */
+ Dmsg0(100, "return write_block_to_dev no data to write\n");
return 1;
}
/*
if (wlen < dev->min_block_size) {
wlen = ((dev->min_block_size + TAPE_BSIZE - 1) / TAPE_BSIZE) * TAPE_BSIZE;
}
+ /* check for fixed block size */
if (dev->min_block_size == dev->max_block_size) {
wlen = block->buf_len; /* fixed block size already rounded */
}
}
}
- dev->block_num++;
- block->BlockNumber = dev->block_num;
ser_block_header(block);
- /* dump_block(block, "after ser_hdr"); */
- if ((dev->max_volume_size > 0) &&
- ((int64_t) (dev->VolCatInfo.VolCatBytes + block->binbuf)) >= dev->max_volume_size) {
- dev->state |= ST_WEOT;
+ /* Limit maximum Volume size to value specified by user */
+ hit_max1 = (dev->max_volume_size > 0) &&
+ ((dev->VolCatInfo.VolCatBytes + block->binbuf)) >= dev->max_volume_size;
+ hit_max2 = (dev->VolCatInfo.VolCatMaxBytes > 0) &&
+ ((dev->VolCatInfo.VolCatBytes + block->binbuf)) >= dev->VolCatInfo.VolCatMaxBytes;
+ if (hit_max1 || hit_max2) {
+ char ed1[50];
+ uint64_t max_cap;
Dmsg0(10, "==== Output bytes Triggered medium max capacity.\n");
- Mmsg2(&dev->errmsg, _("Max. Volume capacity %" lld " exceeded on device %s.\n"),
- dev->max_volume_size, dev->dev_name);
- block->failed_write = TRUE;
-/* ****FIXME**** write EOD record here */
- weof_dev(dev, 1); /* end the tape */
- weof_dev(dev, 1); /* write second eof */
- return 0;
+ if (hit_max1) {
+ max_cap = dev->max_volume_size;
+ } else {
+ max_cap = dev->VolCatInfo.VolCatMaxBytes;
+ }
+ Jmsg(jcr, M_INFO, 0, _("User defined maximum volume capacity %s exceeded on device %s.\n"),
+ edit_uint64(max_cap, ed1), dev->dev_name);
+ block->write_failed = true;
+ if (weof_dev(dev, 1) != 0) { /* end tape */
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ /* Don't do update after second EOF or file count will be wrong */
+ Dmsg0(100, "dir_update_volume_info\n");
+ dev->VolCatInfo.VolCatFiles = dev->file;
+ dir_update_volume_info(jcr, dev, 0);
+ if (dev_cap(dev, CAP_TWOEOF) && weof_dev(dev, 1) != 0) { /* write eof */
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ dev->state |= (ST_EOF | ST_EOT | ST_WEOT);
+ return 0;
+ }
+
+ /* Limit maximum File size on volume to user specified value */
+ if (dev_state(dev, ST_TAPE)) {
+ if ((dev->max_file_size > 0) &&
+ (dev->file_addr+block->binbuf) >= dev->max_file_size) {
+
+ /* Write EOF */
+ if (weof_dev(dev, 1) != 0) { /* write eof */
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ block->write_failed = true;
+ dev->state |= (ST_EOF | ST_EOT | ST_WEOT);
+ Dmsg0(100, "dir_update_volume_info\n");
+ dev->VolCatInfo.VolCatFiles = dev->file;
+ dir_update_volume_info(jcr, dev, 0);
+ return 0;
+ }
+
+ /* Do bookkeeping to handle EOF just written */
+ Dmsg0(100, "dir_update_volume_info\n");
+ dev->VolCatInfo.VolCatFiles = dev->file;
+ dir_update_volume_info(jcr, dev, 0);
+ if (!dir_create_jobmedia_record(jcr)) {
+ Jmsg(jcr, M_ERROR, 0, _("Could not create JobMedia record for Volume=\"%s\" Job=%s\n"),
+ jcr->VolCatInfo.VolCatName, jcr->Job);
+ return 0;
+ }
+ /*
+ * Walk through all attached jcrs indicating the file has changed
+ */
+ Dmsg1(100, "Walk attached jcrs. Volume=%s\n", dev->VolCatInfo.VolCatName);
+ for (JCR *mjcr=NULL; (mjcr=next_attached_jcr(dev, mjcr)); ) {
+ if (mjcr->JobId == 0) {
+ continue; /* ignore console */
+ }
+ mjcr->NewFile = true; /* set reminder to do set_new_file_params */
+ }
+ set_new_file_parameters(jcr, dev);
+ }
}
dev->VolCatInfo.VolCatWrites++;
- if ((uint32_t) (stat=write(dev->fd, block->buf, wlen)) != wlen) {
+ Dmsg1(300, "Write block of %u bytes\n", wlen);
+ stat = write(dev->fd, block->buf, (size_t)wlen);
+ if (stat != (ssize_t)wlen) {
/* We should check for errno == ENOSPC, BUT many
- * devices simply report EIO when it is full.
- * with a little more thought we may be able to check
+ * devices simply report EIO when the volume is full.
+ * With a little more thought we may be able to check
* capacity and distinguish real errors and EOT
* conditions. In any case, we probably want to
* simulate an End of Medium.
*/
-/***FIXME**** if we wrote a partial record, back up over it */
- dev->state |= ST_EOF | ST_EOT | ST_WEOT;
- clrerror_dev(dev, -1);
-
- Dmsg2(0, "=== Write error %d: ERR=%s\n", dev->dev_errno,
- strerror(dev->dev_errno));
+ if (stat == -1) {
+ /* I have added the ifdefing here because it appears on
+ * FreeBSD where MTIOCERRSTAT is defined, this not only
+ * clears the error but clears the residual unwritten
+ * buffers -> data loss. As a consequence, on those
+ * systems (FreeBSD like), do the clrerror() only after
+ * the weof_dev() call.
+ */
+ clrerror_dev(dev, -1);
+ if (dev->dev_errno == 0) {
+ dev->dev_errno = ENOSPC; /* out of space */
+ }
+ Jmsg(jcr, M_ERROR, 0, _("Write error at %u:%u on device %s. ERR=%s.\n"),
+ dev->file, dev->block_num, dev->dev_name, strerror(dev->dev_errno));
+ } else {
+ dev->dev_errno = ENOSPC; /* out of space */
+ Jmsg(jcr, M_INFO, 0, _("End of medium at %u:%u on device %s. Write of %u bytes got %d.\n"),
+ dev->file, dev->block_num, dev->dev_name, wlen, stat);
+ }
+
+ Dmsg6(100, "=== Write error. size=%u rtn=%d dev_blk=%d blk_blk=%d errno=%d: ERR=%s\n",
+ wlen, stat, dev->block_num, block->BlockNumber, dev->dev_errno, strerror(dev->dev_errno));
+
+ block->write_failed = true;
+ if (weof_dev(dev, 1) != 0) { /* end the tape */
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ Dmsg0(100, "dir_update_volume_info\n");
+ dev->VolCatInfo.VolCatFiles = dev->file;
+ dir_update_volume_info(jcr, dev, 0);
+ if (dev_cap(dev, CAP_TWOEOF) && weof_dev(dev, 1) != 0) { /* end the tape */
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ }
+ dev->state |= (ST_EOF | ST_EOT | ST_WEOT);
+
+ ok = true;
+#define CHECK_LAST_BLOCK
+#ifdef CHECK_LAST_BLOCK
+ /*
+ * If the device is a tape and it supports backspace record,
+ * we backspace over one or two eof marks depending on
+ * how many we just wrote, then over the last record,
+ * then re-read it and verify that the block number is
+ * correct.
+ */
+ if (dev->state & ST_TAPE && dev_cap(dev, CAP_BSR)) {
- if (dev->dev_errno == 0) {
- dev->dev_errno = ENOSPC; /* out of space */
+ /* Now back up over what we wrote and read the last block */
+ if (!bsf_dev(dev, 1)) {
+ ok = false;
+ Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"), strerror(dev->dev_errno));
+ }
+ if (ok && dev_cap(dev, CAP_TWOEOF) && !bsf_dev(dev, 1)) {
+ ok = false;
+ Jmsg(jcr, M_ERROR, 0, _("Backspace file at EOT failed. ERR=%s\n"), strerror(dev->dev_errno));
+ }
+ /* Backspace over record */
+ if (ok && !bsr_dev(dev, 1)) {
+ ok = false;
+ Jmsg(jcr, M_ERROR, 0, _("Backspace record at EOT failed. ERR=%s\n"), strerror(dev->dev_errno));
+ /*
+ * On FreeBSD systems, if the user got here, it is likely that his/her
+ * tape drive is "frozen". The correct thing to do is a
+ * rewind(), but if we do that, higher levels in cleaning up, will
+ * most likely write the EOS record over the beginning of the
+ * tape. The rewind *is* done later in mount.c when another
+ * tape is requested. Note, the clrerror_dev() call in bsr_dev()
+ * calls ioctl(MTCERRSTAT), which *should* fix the problem.
+ */
+ }
+ if (ok) {
+ DEV_BLOCK *lblock = new_block(dev);
+ /* Note, this can destroy dev->errmsg */
+ if (!read_block_from_dev(jcr, dev, lblock, NO_BLOCK_NUMBER_CHECK)) {
+ Jmsg(jcr, M_ERROR, 0, _("Re-read last block at EOT failed. ERR=%s"), dev->errmsg);
+ } else {
+ if (lblock->BlockNumber+1 == block->BlockNumber) {
+ Jmsg(jcr, M_INFO, 0, _("Re-read of last block succeeded.\n"));
+ } else {
+ Jmsg(jcr, M_ERROR, 0, _(
+"Re-read of last block failed. Last block=%u Current block=%u.\n"),
+ lblock->BlockNumber, block->BlockNumber);
+ }
+ }
+ free_block(lblock);
+ }
}
- Mmsg2(&dev->errmsg, _("Write error on device %s. ERR=%s.\n"),
- dev->dev_name, strerror(dev->dev_errno));
- block->failed_write = TRUE;
- weof_dev(dev, 1); /* end the tape */
- weof_dev(dev, 1); /* write second eof */
+#endif
return 0;
}
+
+ /* We successfully wrote the block, now do housekeeping */
+
dev->VolCatInfo.VolCatBytes += block->binbuf;
dev->VolCatInfo.VolCatBlocks++;
+ dev->file_addr += wlen;
+ dev->EndBlock = dev->block_num;
+ dev->EndFile = dev->file;
+ dev->block_num++;
+ block->BlockNumber++;
+
+ /* Update jcr values */
+ if (dev_state(dev, ST_TAPE)) {
+ jcr->EndBlock = dev->EndBlock;
+ jcr->EndFile = dev->EndFile;
+ } else {
+ jcr->EndBlock = (uint32_t)dev->file_addr;
+ jcr->EndFile = (uint32_t)(dev->file_addr >> 32);
+ }
+ if (jcr->VolFirstIndex == 0 && block->FirstIndex > 0) {
+ jcr->VolFirstIndex = block->FirstIndex;
+ }
+ if (block->LastIndex > 0) {
+ jcr->VolLastIndex = block->LastIndex;
+ }
+ jcr->WroteVol = true;
+
Dmsg2(190, "write_block: wrote block %d bytes=%d\n", dev->block_num,
wlen);
empty_block(block);
* Read block with locking
*
*/
-int read_block_from_device(DEVICE *dev, DEV_BLOCK *block)
+int read_block_from_device(JCR *jcr, DEVICE *dev, DEV_BLOCK *block, bool check_block_numbers)
{
int stat;
Dmsg0(90, "Enter read_block_from_device\n");
lock_device(dev);
- stat = read_block_from_dev(dev, block);
+ stat = read_block_from_dev(jcr, dev, block, check_block_numbers);
unlock_device(dev);
Dmsg0(90, "Leave read_block_from_device\n");
return stat;
* the block header. For a file, the block may be partially
* or completely in the current buffer.
*/
-int read_block_from_dev(DEVICE *dev, DEV_BLOCK *block)
+int read_block_from_dev(JCR *jcr, DEVICE *dev, DEV_BLOCK *block, bool check_block_numbers)
{
- int stat;
-
- Dmsg0(90, "Full read() in read_block_from_device()\n");
- if ((stat=read(dev->fd, block->buf, block->buf_len)) < 0) {
-
-/* ***FIXME**** add code to detect buffer too small, and
- reallocate buffer, backspace, and reread.
- ENOMEM
- */
+ ssize_t stat;
+ int looping;
+ uint32_t BlockNumber;
+ int retry;
+ if (dev_state(dev, ST_EOT)) {
+ return 0;
+ }
+ looping = 0;
+ Dmsg1(100, "Full read() in read_block_from_device() len=%d\n",
+ block->buf_len);
+reread:
+ if (looping > 1) {
+ Mmsg1(&dev->errmsg, _("Block buffer size looping problem on device %s\n"),
+ dev->dev_name);
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ block->read_len = 0;
+ return 0;
+ }
+ retry = 0;
+ do {
+ stat = read(dev->fd, block->buf, (size_t)block->buf_len);
+ if (retry == 1) {
+ dev->VolCatInfo.VolCatErrors++;
+ }
+ } while (stat == -1 && (errno == EINTR || errno == EIO) && retry++ < 11);
+// Dmsg1(100, "read stat = %d\n", stat);
+ if (stat < 0) {
Dmsg1(90, "Read device got: ERR=%s\n", strerror(errno));
clrerror_dev(dev, -1);
block->read_len = 0;
Mmsg2(&dev->errmsg, _("Read error on device %s. ERR=%s.\n"),
dev->dev_name, strerror(dev->dev_errno));
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ if (dev->state & ST_EOF) { /* EOF just seen? */
+ dev->state |= ST_EOT; /* yes, error => EOT */
+ }
return 0;
}
Dmsg1(90, "Read device got %d bytes\n", stat);
if (stat == 0) { /* Got EOF ! */
dev->block_num = block->read_len = 0;
Mmsg1(&dev->errmsg, _("Read zero bytes on device %s.\n"), dev->dev_name);
- if (dev->state & ST_EOF) { /* EOF alread read? */
+ if (dev->state & ST_EOF) { /* EOF already read? */
dev->state |= ST_EOT; /* yes, 2 EOFs => EOT */
+ block->read_len = 0;
return 0;
}
dev->file++; /* increment file */
dev->state |= ST_EOF; /* set EOF read */
+ block->read_len = 0;
return 0; /* return eof */
}
/* Continue here for successful read */
block->read_len = stat; /* save length read */
- if (block->read_len < BLKHDR_LENGTH) {
+ if (block->read_len < BLKHDR2_LENGTH) {
Mmsg2(&dev->errmsg, _("Very short block of %d bytes on device %s discarded.\n"),
block->read_len, dev->dev_name);
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
dev->state |= ST_SHORT; /* set short block */
block->read_len = block->binbuf = 0;
return 0; /* return error */
}
- if (!unser_block_header(dev, block)) {
+
+ BlockNumber = block->BlockNumber + 1;
+ if (!unser_block_header(jcr, dev, block)) {
+ block->read_len = 0;
return 0;
}
+ /*
+ * If the block is bigger than the buffer, we reposition for
+ * re-reading the block, allocate a buffer of the correct size,
+ * and go re-read.
+ */
+ if (block->block_len > block->buf_len) {
+ Mmsg2(&dev->errmsg, _("Block length %u is greater than buffer %u. Attempting recovery.\n"),
+ block->block_len, block->buf_len);
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ Pmsg1(000, "%s", dev->errmsg);
+ /* Attempt to reposition to re-read the block */
+ if (dev->state & ST_TAPE) {
+ Dmsg0(100, "Backspace record for reread.\n");
+ if (!bsr_dev(dev, 1)) {
+ Jmsg(jcr, M_ERROR, 0, "%s", strerror_dev(dev));
+ block->read_len = 0;
+ return 0;
+ }
+ } else {
+ Dmsg0(100, "Seek to beginning of block for reread.\n");
+ off_t pos = lseek(dev->fd, (off_t)0, SEEK_CUR); /* get curr pos */
+ pos -= block->read_len;
+ lseek(dev->fd, pos, SEEK_SET);
+ }
+ Mmsg1(&dev->errmsg, _("Setting block buffer size to %u bytes.\n"), block->block_len);
+ Jmsg(jcr, M_INFO, 0, "%s", dev->errmsg);
+ Pmsg1(000, "%s", dev->errmsg);
+ /* Set new block length */
+ dev->max_block_size = block->block_len;
+ block->buf_len = block->block_len;
+ free_memory(block->buf);
+ block->buf = get_memory(block->buf_len);
+ empty_block(block);
+ looping++;
+ goto reread; /* re-read block with correct block size */
+ }
+
if (block->block_len > block->read_len) {
- Mmsg2(&dev->errmsg, _("Short block of %d bytes on device %s discarded.\n"),
- block->read_len, dev->dev_name);
+ Mmsg3(&dev->errmsg, _("Short block at %u of %d bytes on device %s discarded.\n"),
+ dev->block_num, block->read_len, dev->dev_name);
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
dev->state |= ST_SHORT; /* set short block */
block->read_len = block->binbuf = 0;
return 0; /* return error */
}
- /* Make sure block size is not too big (temporary
- * sanity check) and that we read the full block.
- */
- ASSERT(block->block_len < MAX_BLOCK_LENGTH);
-
dev->state &= ~(ST_EOF|ST_SHORT); /* clear EOF and short block */
+ dev->VolCatInfo.VolCatReads++;
+ dev->VolCatInfo.VolCatRBytes += block->read_len;
+
+ dev->VolCatInfo.VolCatBytes += block->block_len;
+ dev->VolCatInfo.VolCatBlocks++;
+ dev->file_addr += block->block_len;
+ dev->EndBlock = dev->block_num;
+ dev->EndFile = dev->file;
dev->block_num++;
+ /* Update jcr values */
+ if (dev->state & ST_TAPE) {
+ jcr->EndBlock = dev->EndBlock;
+ jcr->EndFile = dev->EndFile;
+ } else {
+ jcr->EndBlock = (uint32_t)dev->file_addr;
+ jcr->EndFile = (uint32_t)(dev->file_addr >> 32);
+ }
+
/*
* If we read a short block on disk,
* seek to beginning of next block. This saves us
* from shuffling blocks around in the buffer. Take a
* look at this from an efficiency stand point later, but
* it should only happen once at the end of each job.
+ *
+ * I've been lseek()ing negative relative to SEEK_CUR for 30
+ * years now. However, it seems that with the new off_t definition,
+ * it is not possible to seek negative amounts, so we use two
+ * lseek(). One to get the position, then the second to do an
+ * absolute positioning -- so much for efficiency. KES Sep 02.
*/
Dmsg0(200, "At end of read block\n");
if (block->read_len > block->block_len && !(dev->state & ST_TAPE)) {
-
- Dmsg3(200, "Block: %d read_len %d > %d block_len\n", dev->block_num,
-block->read_len, block->block_len);
- lseek(dev->fd, block->block_len-block->read_len, SEEK_CUR);
- Dmsg2(90, "Did lseek blk_size=%d rdlen=%d\n", block->block_len,
+ off_t pos = lseek(dev->fd, (off_t)0, SEEK_CUR); /* get curr pos */
+ pos -= (block->read_len - block->block_len);
+ lseek(dev->fd, pos, SEEK_SET);
+ Dmsg2(100, "Did lseek blk_size=%d rdlen=%d\n", block->block_len,
block->read_len);
}
Dmsg2(200, "Exit read_block read_len=%d block_len=%d\n",
block->read_len, block->block_len);
+ block->block_read = true;
return 1;
}
projects / bacula / bacula / blobdiff