* block.c -- tape block handling functions
*
* Kern Sibbald, March MMI
+ * added BB02 format October MMII
*
* Version $Id$
*
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;
}
/* 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;
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 */
}
/*
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);
+ 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);
+ Emsg0(M_ERROR, 0, dev->errmsg);
+ 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);
+ Emsg0(M_ERROR, 0, dev->errmsg);
+ return 0;
+ }
+ } else {
+ Mmsg1(&dev->errmsg, _("Expected block-id BB01 or BB02, got %s. Buffer discarded.\n"), Id);
Emsg0(M_ERROR, 0, dev->errmsg);
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);
+ Emsg0(M_ERROR, 0, dev->errmsg);
+ 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);
{
int stat = 1;
lock_device(dev);
- if (!write_block_to_dev(dev, block)) {
+ if (!write_block_to_dev(jcr, dev, block)) {
stat = fixup_device_block_write_error(jcr, dev, block);
}
unlock_device(dev);
* 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;
+ size_t stat = 0;
uint32_t wlen; /* length to write */
+ int hit_max1, hit_max2;
+ int 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");
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);
/* Limit maximum Volume size to value specified by user */
- if ((dev->max_volume_size > 0) &&
- ((int64_t) (dev->VolCatInfo.VolCatBytes + block->binbuf)) >= dev->max_volume_size) {
+ 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];
dev->state |= ST_WEOT;
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);
+ if (hit_max1) {
+ Mmsg2(&dev->errmsg, _("Max. Volume capacity %s exceeded on device %s.\n"),
+ edit_uint64(dev->max_volume_size, ed1), dev->dev_name);
+ } else {
+ Mmsg2(&dev->errmsg, _("Max. Volume capacity %s exceeded on device %s.\n"),
+ edit_uint64(dev->VolCatInfo.VolCatMaxBytes, ed1), dev->dev_name);
+ }
block->failed_write = TRUE;
-/* ****FIXME**** write EOD record here */
+ dev->EndBlock = dev->block_num;
+ dev->EndFile = dev->file;
weof_dev(dev, 1); /* end the tape */
weof_dev(dev, 1); /* write second eof */
return 0;
}
dev->VolCatInfo.VolCatWrites++;
- if ((uint32_t) (stat=write(dev->fd, block->buf, wlen)) != wlen) {
+ Dmsg1(500, "Write block of %u bytes\n", wlen);
+ if ((uint32_t) (stat=write(dev->fd, block->buf, (size_t)wlen)) != 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
* 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 (dev->dev_errno == 0) {
dev->dev_errno = ENOSPC; /* out of space */
}
- Mmsg2(&dev->errmsg, _("Write error on device %s. ERR=%s.\n"),
- dev->dev_name, strerror(dev->dev_errno));
+
+ Dmsg4(10, "=== Write error. size=%u rtn=%d errno=%d: ERR=%s\n",
+ wlen, stat, dev->dev_errno, strerror(dev->dev_errno));
+
+ Mmsg4(&dev->errmsg, _("Write error on device %s. Write of %u bytes got %d. ERR=%s.\n"),
+ dev->dev_name, wlen, stat, strerror(dev->dev_errno));
block->failed_write = TRUE;
+ dev->EndBlock = dev->block_num;
+ dev->EndFile = dev->file;
weof_dev(dev, 1); /* end the tape */
weof_dev(dev, 1); /* write second eof */
+
+ ok = TRUE;
+#define CHECK_LAST_BLOCK
+#ifdef CHECK_LAST_BLOCK
+ /*
+ * If the device is a tape and it supports backspace record,
+ * we backspace over two eof marks and over the last record,
+ * then re-read it and verify that the block number is
+ * correct.
+ */
+ if (dev->state & ST_TAPE && dev->capabilities & CAP_BSR) {
+
+ /* Now back up over what we wrote and read the last block */
+ if (bsf_dev(dev, 1) != 0 || bsf_dev(dev, 1) != 0) {
+ ok = FALSE;
+ Jmsg(jcr, M_ERROR, 0, _("Back space file at EOT failed. ERR=%s\n"), strerror(dev->dev_errno));
+ }
+ /* Backspace over record */
+ if (ok && bsr_dev(dev, 1) != 0) {
+ ok = FALSE;
+ Jmsg(jcr, M_ERROR, 0, _("Back space record at EOT failed. ERR=%s\n"), strerror(dev->dev_errno));
+ }
+ if (ok) {
+ DEV_BLOCK *lblock = new_block(dev);
+ /* Note, this can destroy dev->errmsg */
+ if (!read_block_from_dev(dev, lblock)) {
+ 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);
+ }
+ }
+#endif
return 0;
}
dev->VolCatInfo.VolCatBytes += block->binbuf;
dev->VolCatInfo.VolCatBlocks++;
- dev->file_bytes += block->binbuf;
+ dev->file_addr += wlen;
+ dev->EndBlock = dev->block_num;
+ dev->EndFile = dev->file;
/* Limit maximum File size on volume to user specified value */
- if ((dev->max_file_size > 0) &&
- dev->file_bytes >= dev->max_file_size) {
- weof_dev, 1); /* write end of file */
+ if (dev->state & ST_TAPE) {
+ if ((dev->max_file_size > 0) && dev->file_addr >= dev->max_file_size) {
+ weof_dev(dev, 1); /* write eof */
+ }
}
+ dev->block_num++;
+ block->BlockNumber++;
Dmsg2(190, "write_block: wrote block %d bytes=%d\n", dev->block_num,
wlen);
empty_block(block);
*/
int read_block_from_dev(DEVICE *dev, DEV_BLOCK *block)
{
- 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
- */
-
+ size_t stat;
+ int looping;
+
+ 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);
+ block->read_len = 0;
+ return 0;
+ }
+ if ((stat=read(dev->fd, block->buf, (size_t)block->buf_len)) < 0) {
Dmsg1(90, "Read device got: ERR=%s\n", strerror(errno));
clrerror_dev(dev, -1);
block->read_len = 0;
}
/* 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);
dev->state |= ST_SHORT; /* set short block */
block->read_len = block->binbuf = 0;
return 0; /* return error */
}
+
if (!unser_block_header(dev, block)) {
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);
+ Emsg0(M_WARNING, 0, dev->errmsg);
+ Dmsg1(000, "%s", dev->errmsg);
+ /* Attempt to reposition to re-read the block */
+ if (dev->state & ST_TAPE) {
+ Dmsg0(000, "Backspace record for reread.\n");
+ if (bsf_dev(dev, 1) != 0) {
+ Emsg0(M_ERROR, 0, dev->errmsg);
+ return 0;
+ }
+ } else {
+ Dmsg0(000, "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, _("Resetting buffer size to %u bytes.\n"), block->block_len);
+ Emsg0(M_WARNING, 0, dev->errmsg);
+ Dmsg1(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);
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->block_num++;
* 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",