* 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
}
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 + 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_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);
+ 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) {
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;
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"),
+ 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 {
+ Emsg0(M_ERROR, 0, dev->errmsg);
+ return 0;
+ }
+ } else if (Id[3] == '2') {
unser_uint32(block->VolSessionId);
unser_uint32(block->VolSessionTime);
bhl = BLKHDR2_LENGTH;
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 - bhl;
+ 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,
bhl, block_len);
- if (block_len > block->buf_len) {
- Mmsg2(&dev->errmsg, _("Block length %u is greater than buffer %u\n"),
- block_len, block->buf_len);
- Emsg0(M_ERROR, 0, dev->errmsg);
- return 0;
- }
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);
return 0;
}
}
{
int stat = 1;
lock_device(dev);
- if (!write_block_to_dev(dev, block)) {
+ if (!write_block_to_dev(jcr, dev, block)) {
+ Jmsg(jcr, M_INFO, 0, "%s", dev->errmsg);
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)
{
- size_t stat = 0;
+ ssize_t stat = 0;
uint32_t wlen; /* length to write */
+ int hit_max1, hit_max2;
+ int ok;
#ifdef NO_TAPE_WRITE_TEST
empty_block(block);
/* dump_block(block, "before write"); */
if (dev->state & ST_WEOT) {
Dmsg0(100, "return write_block_to_dev with ST_WEOT\n");
+ Mmsg0(&dev->errmsg, _("Cannot write block. Device at EOF.\n"));
return 0;
}
wlen = block->binbuf;
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) &&
- ((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) {
+ Mmsg(&dev->errmsg, _("Max. Volume capacity %s exceeded on device %s.\n"),
+ edit_uint64(dev->max_volume_size, ed1), dev->dev_name);
+ } else {
+ Mmsg(&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;
}
+ /* Limit maximum File size on volume to user specified value */
+ if (dev->state & ST_TAPE) {
+ if ((dev->max_file_size > 0) &&
+ (dev->file_addr+block->binbuf) >= dev->max_file_size) {
+ if (weof_dev(dev, 1) != 0) { /* write eof */
+ Jmsg(jcr, M_ERROR, 0, "%s", dev->errmsg);
+ /* Plunge on anyway -- if tape is bad we will die on write */
+ }
+ }
+ }
+
dev->VolCatInfo.VolCatWrites++;
-// Dmsg1(000, "Pos before write=%lld\n", lseek(dev->fd, (off_t)0, SEEK_CUR));
- if ((uint32_t) (stat=write(dev->fd, block->buf, (size_t)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);
dev->dev_errno = ENOSPC; /* out of space */
}
- Dmsg2(0, "=== Write error errno=%d: ERR=%s\n", dev->dev_errno,
- 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));
- Mmsg2(&dev->errmsg, _("Write error on device %s. ERR=%s.\n"),
- dev->dev_name, strerror(dev->dev_errno));
+ if (stat == -1) {
+ Mmsg2(&dev->errmsg, _("Write error on device %s. ERR=%s.\n"),
+ dev->dev_name, strerror(dev->dev_errno));
+ } else {
+ Mmsg3(&dev->errmsg, _("End of media on device %s. Write of %u bytes got %d.\n"),
+ dev->dev_name, wlen, stat);
+ }
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_cap(dev, 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;
}
-// Dmsg1(000, "Pos after write=%lld\n", lseek(dev->fd, (off_t)0, SEEK_CUR));
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;
+ dev->block_num++;
+ block->BlockNumber++;
- /* Limit maximum File size on volume to user specified value */
- if (dev->state & ST_TAPE) {
- if ((dev->max_file_size > 0) && dev->file_bytes >= dev->max_file_size) {
- weof_dev(dev, 1); /* write eof */
- }
- }
Dmsg2(190, "write_block: wrote block %d bytes=%d\n", dev->block_num,
wlen);
*/
int read_block_from_dev(DEVICE *dev, DEV_BLOCK *block)
{
- size_t stat;
+ ssize_t stat;
+ int looping;
+ looping = 0;
Dmsg1(100, "Full read() in read_block_from_device() len=%d\n",
block->buf_len);
-// Dmsg1(000, "Pos before read=%lld\n", lseek(dev->fd, (off_t)0, SEEK_CUR));
+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) {
-
-/* ***FIXME**** add code to detect buffer too small, and
- reallocate buffer, backspace, and reread.
- ENOMEM
- */
-
Dmsg1(90, "Read device got: ERR=%s\n", strerror(errno));
clrerror_dev(dev, -1);
block->read_len = 0;
dev->dev_name, strerror(dev->dev_errno));
return 0;
}
-// Dmsg1(000, "Pos after read=%lld\n", lseek(dev->fd, (off_t)0, SEEK_CUR));
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? */
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 = block->binbuf = 0;
return 0; /* return error */
}
+
if (!unser_block_header(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);
+ 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(100, "Backspace record for reread.\n");
+ if (bsf_dev(dev, 1) != 0) {
+ Emsg0(M_ERROR, 0, dev->errmsg);
+ 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, _("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++;
projects / bacula / bacula / blobdiff