/*
* Pretty printer
*/
void
ndmchan_pp (struct ndmchan *ch, char *buf)
{
int show_ra = 0;
char * bp = buf;
char * p;
sprintf (bp, "name=%s", ch->name); while (*bp) bp++;
switch (ch->mode) {
case NDMCHAN_MODE_IDLE: p = "idle"; break;
case NDMCHAN_MODE_RESIDENT: p = "resident"; show_ra = 1; break;
case NDMCHAN_MODE_READ: p = "read"; show_ra = 1; break;
case NDMCHAN_MODE_WRITE: p = "write"; show_ra = 1; break;
case NDMCHAN_MODE_READCHK: p = "readchk"; break;
case NDMCHAN_MODE_LISTEN: p = "listen"; break;
case NDMCHAN_MODE_PENDING: p = "pending"; break;
case NDMCHAN_MODE_CLOSED: p = "closed"; break;
default: p = "mode=???"; break;
}
sprintf (bp, " %s ", p);
while (*bp) bp++;
if (show_ra) {
sprintf (bp, "ready=%d avail=%d ",
ndmchan_n_ready(ch), ndmchan_n_avail(ch));
while (*bp) bp++;
}
if (ch->ready) strcat (bp, "-rdy");
if (ch->check) strcat (bp, "-chk");
if (ch->eof) strcat (bp, "-eof");
if (ch->error) strcat (bp, "-err");
}
enum ndmchan_read_interpretation
ndmchan_read_interpret (struct ndmchan *ch, char **data_p,
unsigned *n_ready_p)
{
unsigned n_ready;
n_ready = *n_ready_p = ndmchan_n_ready (ch);
*data_p = &ch->data[ch->beg_ix];
if (ch->error) {
if (n_ready == 0) {
return NDMCHAN_RI_DONE_ERROR;
} else {
return NDMCHAN_RI_DRAIN_ERROR;
}
}
if (ch->eof) {
if (n_ready == 0) {
return NDMCHAN_RI_DONE_EOF;
} else {
return NDMCHAN_RI_DRAIN_EOF;
}
}
if (n_ready == 0) {
return NDMCHAN_RI_EMPTY;
}
if (n_ready == ch->data_size) {
return NDMCHAN_RI_READY_FULL;
}
return NDMCHAN_RI_READY;
}
int
ndmda_quantum_stderr (struct ndm_session *sess)
{
struct ndm_data_agent * da = sess->data_acb;
struct ndmchan * ch = &da->formatter_error;
int did_something = 0;
char * p;
char * data;
char * pend;
unsigned n_ready;
again:
n_ready = ndmchan_n_ready (ch);
if (n_ready == 0)
return did_something;
data = p = &ch->data[ch->beg_ix];
pend = p + n_ready;
while (p < pend && *p != '\n') p++;
if (p < pend && *p == '\n') {
*p++ = 0;
ndma_send_logmsg (sess, NDMP9_LOG_NORMAL, sess->plumb.data,
"%s", data);
ch->beg_ix += p - data;
did_something++;
goto again;
}
if (!ch->eof)
return did_something;
/* content w/o newline, and EOF */
/* p == pend */
if (ch->end_ix >= ch->data_size) {
if (data != ch->data) {
ndmchan_compress (ch);
goto again;
}
/* that's one huge message */
p--; /* lose last byte */
}
ch->data[ch->end_ix++] = '\n';
did_something++;
goto again;
}
int
ndmchan_pre_poll (struct ndmchan *chtab[], unsigned n_chtab)
{
struct ndmchan * ch;
unsigned int i, n_check;
n_check = 0;
for (i = 0; i < n_chtab; i++) {
ch = chtab[i];
ch->ready = 0;
ch->check = 0;
if (ch->error)
continue;
switch (ch->mode) {
default:
case NDMCHAN_MODE_IDLE:
case NDMCHAN_MODE_PENDING:
case NDMCHAN_MODE_RESIDENT:
case NDMCHAN_MODE_CLOSED:
continue;
case NDMCHAN_MODE_LISTEN:
case NDMCHAN_MODE_READCHK:
break;
case NDMCHAN_MODE_READ:
if (ch->eof)
continue;
if (ndmchan_n_avail (ch) == 0)
continue;
break;
case NDMCHAN_MODE_WRITE:
if (ndmchan_n_ready (ch) == 0)
continue;
break;
}
ch->check = 1;
n_check++;
}
return n_check;
}
int
ndmta_write_quantum (struct ndm_session *sess)
{
struct ndm_tape_agent * ta = &sess->tape_acb;
struct ndmchan * ch = &sess->plumb.image_stream.chan;
unsigned long count = ta->mover_state.record_size;
int did_something = 0;
unsigned long long max_read;
unsigned long long want_window_off;
unsigned long want_blockno;
unsigned long cur_blockno;
unsigned n_avail, n_read, record_off;
char * data;
unsigned long done_count;
ndmp9_error error;
again:
n_read = n_avail = ndmchan_n_avail (ch);
if (n_avail == 0) {
/* allow to drain */
return did_something;
}
if (ta->pending_change_after_drain) {
if (ndmchan_n_ready (ch) > 0) {
/* allow to drain */
} else {
ndmta_mover_apply_pending (sess);
did_something++;
}
return did_something;
}
if (n_read > ta->mover_state.bytes_left_to_read)
n_read = ta->mover_state.bytes_left_to_read;
if (n_read == 0) {
/* Active, but paused awaiting MOVER_READ request */
return did_something; /* mover blocked */
}
if (ta->mover_want_pos < ta->mover_state.window_offset
|| ta->mover_want_pos >= ta->mover_window_end) {
ndmta_mover_pause_pending (sess, NDMP9_MOVER_PAUSE_SEEK);
goto again;
}
max_read = ta->mover_window_end - ta->mover_want_pos;
if (n_read > max_read)
n_read = max_read;
want_window_off = ta->mover_want_pos - ta->mover_state.window_offset;
want_blockno = want_window_off / ta->mover_state.record_size;
if (ta->tb_blockno != want_blockno) {
unsigned long xsr_count, xsr_resid;
ndmos_tape_sync_state(sess);
cur_blockno = ta->tape_state.blockno.value;
if (cur_blockno < want_blockno) {
xsr_count = want_blockno - cur_blockno;
error = ndmos_tape_mtio (sess, NDMP9_MTIO_FSR,
xsr_count, &xsr_resid);
if (error == NDMP9_EOF_ERR) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
if (error != NDMP9_NO_ERR) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_MEDIA_ERROR);
goto again;
}
if (xsr_resid > 0) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
} else if (cur_blockno > want_blockno) {
xsr_count = cur_blockno - want_blockno;
error = ndmos_tape_mtio (sess, NDMP9_MTIO_BSR,
xsr_count, &xsr_resid);
if (error != NDMP9_NO_ERR || xsr_resid > 0) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_MEDIA_ERROR);
goto again;
}
} else {
/* in position */
}
data = ta->tape_buffer;
done_count = 0;
error = ndmos_tape_read (sess, data, count, &done_count);
did_something++;
if (error == NDMP9_EOF_ERR) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
if (error != NDMP9_NO_ERR) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_MEDIA_ERROR);
goto again;
}
if (done_count == 0) {
return did_something - 1;
}
if (done_count != count) {
n_read = done_count;
goto aaa;
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_MEDIA_ERROR);
goto again;
}
ta->tb_blockno = want_blockno;
}
aaa:
record_off = ta->mover_want_pos % ta->mover_state.record_size;
n_avail = ta->mover_state.record_size - record_off;
if (n_read > n_avail)
n_read = n_avail;
data = &ta->tape_buffer[record_off];
bcopy (data, ch->data + ch->end_ix, n_read);
ch->end_ix += n_read;
ta->mover_want_pos += n_read;
ta->mover_state.bytes_left_to_read -= n_read;
did_something++;
goto again; /* do as much as possible */
}
int
ndmta_read_quantum (struct ndm_session *sess)
{
struct ndm_tape_agent * ta = &sess->tape_acb;
struct ndmchan * ch = &sess->plumb.image_stream.chan;
unsigned long count = ta->mover_state.record_size;
int did_something = 0;
unsigned n_ready;
char * data;
unsigned long done_count;
ndmp9_error error;
again:
n_ready = ndmchan_n_ready (ch);
if (ch->eof) {
if (n_ready == 0) {
/* done */
if (ch->saved_errno)
ndmta_mover_halt (sess,
NDMP9_MOVER_HALT_CONNECT_ERROR);
else
ndmta_mover_halt (sess,
NDMP9_MOVER_HALT_CONNECT_CLOSED);
did_something++;
return did_something;
}
if (n_ready < count) {
int n_pad = count - n_ready;
unsigned n_avail;
while (n_pad > 0) {
n_avail = ndmchan_n_avail (ch);
if (n_avail == 0) {
/* Uh-oh */
}
data = &ch->data[ch->end_ix];
if (n_avail > n_pad)
n_avail = n_pad;
bzero (data, n_avail);
ch->end_ix += n_avail;
n_pad -= n_avail;
}
n_ready = ndmchan_n_ready (ch);
}
}
if (n_ready < count) {
return did_something; /* blocked */
}
if (ta->mover_want_pos >= ta->mover_window_end) {
ndmta_mover_pause (sess, NDMP9_MOVER_PAUSE_SEEK);
did_something++;
return did_something;
}
data = &ch->data[ch->beg_ix];
done_count = 0;
error = ndmos_tape_write (sess, data, count, &done_count);
switch (error) {
case NDMP9_NO_ERR:
if (done_count != count) {
/* This ain't suppose to happen */
}
ta->mover_state.bytes_moved += count;
ta->mover_want_pos += count;
ch->beg_ix += count;
did_something++;
goto again; /* write as much to tape as possible */
case NDMP9_EOM_ERR:
ndmta_mover_pause (sess, NDMP9_MOVER_PAUSE_EOM);
did_something++;
break;
default:
ndmta_mover_pause (sess, NDMP9_MOVER_PAUSE_MEDIA_ERROR);
did_something++;
break;
}
return did_something;
}
int
ndmda_quantum_image (struct ndm_session *sess)
{
struct ndm_data_agent * da = sess->data_acb;
struct ndmchan * from_chan;
struct ndmchan * to_chan;
unsigned n_ready, n_avail, n_copy;
int is_backup = 0;
switch (da->data_state.operation) {
default:
assert (0);
from_chan = 0;
to_chan = 0;
break;
case NDMP9_DATA_OP_BACKUP:
from_chan = &da->formatter_image;
to_chan = &sess->plumb.image_stream->chan;
is_backup = 1;
break;
case NDMP9_DATA_OP_RECOVER:
case NDMP9_DATA_OP_RECOVER_FILEHIST:
from_chan = &sess->plumb.image_stream->chan;
to_chan = &da->formatter_image;
break;
}
again:
n_copy = n_ready = ndmchan_n_ready (from_chan);
if (n_ready == 0) {
if (from_chan->eof) {
to_chan->eof = 1;
if (ndmchan_n_ready (to_chan) == 0) {
if (is_backup) {
ndmda_data_halt (sess,
NDMP9_DATA_HALT_SUCCESSFUL);
}
}
}
return 0; /* data blocked */
}
n_avail = ndmchan_n_avail (to_chan);
if (n_copy > n_avail)
n_copy = n_avail;
if (da->enable_hist) {
if (n_copy > da->pass_resid)
n_copy = da->pass_resid;
}
if (n_copy > 0) {
bcopy (&from_chan->data[from_chan->beg_ix],
&to_chan->data[to_chan->end_ix],
n_copy);
from_chan->beg_ix += n_copy;
to_chan->end_ix += n_copy;
da->data_state.bytes_processed += n_copy;
da->pass_resid -= n_copy;
goto again; /* do as much as possible */
}
return 0;
}
int
ndmda_quantum_wrap (struct ndm_session *sess)
{
struct ndm_data_agent * da = sess->data_acb;
struct ndmchan * ch = &da->formatter_wrap;
int did_something = 0;
char * p;
char * data;
char * pend;
unsigned n_ready;
int is_recover = 0;
switch (da->data_state.operation) {
default:
assert (0);
break;
case NDMP9_DATA_OP_BACKUP:
break;
case NDMP9_DATA_OP_RECOVER:
case NDMP9_DATA_OP_RECOVER_FILEHIST:
is_recover = 1;
break;
}
again:
n_ready = ndmchan_n_ready (ch);
if (n_ready == 0) {
if (ch->eof && is_recover) {
ndmda_data_halt (sess, NDMP9_DATA_HALT_SUCCESSFUL);
}
return did_something;
}
data = p = &ch->data[ch->beg_ix];
pend = p + n_ready;
while (p < pend && *p != '\n') p++;
if (p < pend && *p == '\n') {
*p++ = 0;
ndmda_wrap_in (sess, data);
ch->beg_ix += p - data;
did_something++;
goto again;
}
if (!ch->eof)
return did_something;
/* content w/o newline, and EOF */
/* p == pend */
if (ch->end_ix >= ch->data_size) {
if (data != ch->data) {
ndmchan_compress (ch);
goto again;
}
/* that's one huge message */
p--; /* lose last byte */
}
ch->data[ch->end_ix++] = '\n';
did_something++;
goto again;
}
int
ndmta_write_quantum (struct ndm_session *sess)
{
struct ndm_tape_agent * ta = sess->tape_acb;
struct ndmchan * ch = &sess->plumb.image_stream->chan;
uint32_t count = ta->mover_state.record_size;
int did_something = 0;
uint64_t max_read;
uint64_t want_window_off;
uint32_t block_size;
uint32_t want_blockno;
uint32_t cur_blockno;
unsigned n_avail, n_read, record_off;
char * data;
uint32_t done_count = 0;
ndmp9_error error;
again:
n_read = n_avail = ndmchan_n_avail_record (ch, count);
if (n_avail < count) {
/* allow to drain */
return did_something;
}
if (ta->pending_change_after_drain) {
if (ndmchan_n_ready (ch) > 0) {
/* allow to drain */
} else {
ndmta_mover_apply_pending (sess);
did_something++;
}
return did_something;
}
if (n_read > ta->mover_state.bytes_left_to_read)
n_read = ta->mover_state.bytes_left_to_read;
if (n_read < count) {
/* Active, but paused awaiting MOVER_READ request */
return did_something; /* mover blocked */
}
if (ta->mover_want_pos < ta->mover_state.window_offset
|| ta->mover_want_pos >= ta->mover_window_end) {
ndmta_mover_pause_pending (sess, NDMP9_MOVER_PAUSE_SEEK);
goto again;
}
max_read = ta->mover_window_end - ta->mover_want_pos;
if (n_read > max_read)
n_read = max_read;
want_window_off = ta->mover_want_pos - ta->mover_state.window_offset;
/* make an estimate of the block size - the tape agent's block size, or
* if it's in variable block size mode, the mover's record size: "When
* in variable block mode, as indicated by a tape block_size value of
* zero, the mover record size defines the actual block size used by
* the tape subsystem." (NDMPv4 RFC, Section 3.6.2.1) */
block_size = ta->tape_state.block_size.value;
if (!block_size)
block_size = ta->mover_state.record_size;
want_blockno = ta->mover_window_first_blockno + want_window_off / block_size;
if (ta->tb_blockno != want_blockno) {
uint32_t xsr_count, xsr_resid;
ndmos_tape_sync_state(sess);
cur_blockno = ta->tape_state.blockno.value;
if (cur_blockno < want_blockno) {
xsr_count = want_blockno - cur_blockno;
error = ndmos_tape_mtio (sess, NDMP9_MTIO_FSR,
xsr_count, &xsr_resid);
if (error == NDMP9_EOF_ERR) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
if (error != NDMP9_NO_ERR) {
ndmta_mover_halt_pending (sess,
NDMP9_MOVER_HALT_MEDIA_ERROR);
goto again;
}
if (xsr_resid > 0) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
} else if (cur_blockno > want_blockno) {
xsr_count = cur_blockno - want_blockno;
error = ndmos_tape_mtio (sess, NDMP9_MTIO_BSR,
xsr_count, &xsr_resid);
if (error != NDMP9_NO_ERR || xsr_resid > 0) {
ndmta_mover_halt_pending (sess,
NDMP9_MOVER_HALT_MEDIA_ERROR);
goto again;
}
} else {
/* in position */
}
/*
* We are about to read data into a tape buffer so make sure
* we have it available. We delay allocating buffers to the
* moment we first need them.
*/
if (!ta->tape_buffer) {
ta->tape_buffer = NDMOS_API_MALLOC (NDMOS_CONST_TAPE_REC_MAX);
if (!ta->tape_buffer) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_HALT_NA);
goto again;
}
}
data = ta->tape_buffer;
done_count = 0;
error = ndmos_tape_read (sess, data, count, &done_count);
did_something++;
if (error == NDMP9_EOF_ERR) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
/* N.B. - handling of done_count = 0 here is hacked to support
* non-blocking writes to a socket in amndmjob */
if (error != NDMP9_NO_ERR) {
ndmta_mover_halt_pending (sess,
NDMP9_MOVER_HALT_MEDIA_ERROR);
goto again;
}
if (done_count == 0) {
return did_something - 1;
}
if (done_count != count) {
goto again;
}
ta->tb_blockno = want_blockno;
/* re-calcluate this, since record_size may be > block_size, in which
* case the record_num may not change for each block read from tape */
ta->mover_state.record_num = ta->mover_want_pos / ta->mover_state.record_size;
}
record_off = ta->mover_want_pos % ta->mover_state.record_size;
n_avail = ta->mover_state.record_size - record_off;
if (n_read > n_avail)
n_read = n_avail;
if (n_read != done_count) {
printf("lost %lu bytes %lu %u\n", done_count - n_read, done_count, n_read);
n_read = done_count;
}
/*
* We are about to read data into a tape buffer so make sure
* we have it available. We delay allocating buffers to the
* moment we first need them.
*/
if (!ta->tape_buffer) {
ta->tape_buffer = NDMOS_API_MALLOC (NDMOS_CONST_TAPE_REC_MAX);
if (!ta->tape_buffer) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_HALT_NA);
goto again;
}
}
data = &ta->tape_buffer[record_off];
bcopy (data, ch->data + ch->end_ix, n_read);
ch->end_ix += n_read;
ta->mover_state.bytes_moved += n_read;
ta->mover_want_pos += n_read;
ta->mover_state.bytes_left_to_read -= n_read;
did_something++;
goto again; /* do as much as possible */
}
int
ndmchan_post_poll (struct ndmchan *chtab[], unsigned n_chtab)
{
struct ndmchan * ch;
unsigned int i;
int rc, len, n_ready;
n_ready = 0;
for (i = 0; i < n_chtab; i++) {
ch = chtab[i];
if (!ch->ready)
continue;
switch (ch->mode) {
case NDMCHAN_MODE_READ:
len = ndmchan_n_avail (ch);
if (len <= 0) continue;
n_ready++;
rc = read (ch->fd, &ch->data[ch->end_ix], len);
if (rc < 0) {
if (errno != NDMOS_CONST_EWOULDBLOCK) {
ch->error = ch->eof = 1;
ch->saved_errno = errno;
if (!ch->saved_errno)
ch->saved_errno = -1;
} else {
/* no bytes read */
}
} else if (rc == 0) {
ch->eof = 1;
ch->error = 0;
ch->saved_errno = 0;
} else {
ch->end_ix += rc;
}
break;
case NDMCHAN_MODE_WRITE:
len = ndmchan_n_ready (ch);
if (len <= 0) continue;
n_ready++;
rc = write (ch->fd, &ch->data[ch->beg_ix], len);
if (rc < 0) {
if (errno != NDMOS_CONST_EWOULDBLOCK) {
ch->eof = 1;
ch->error = 1;
ch->saved_errno = errno;
if (!ch->saved_errno)
ch->saved_errno = -1;
} else {
/* no bytes written */
/* EWOULDBLOCK but ready? */
}
} else if (rc == 0) {
/* NDMOS_CONST_EWOULDBLOCK? */
ch->eof = 1;
ch->error = 1;
ch->saved_errno = 0;
} else {
ch->beg_ix += rc;
}
break;
}
}
return n_ready;
}
int
ndmta_write_quantum (struct ndm_session *sess)
{
struct ndm_tape_agent * ta = &sess->tape_acb;
struct ndmchan * ch = &sess->plumb.image_stream.chan;
unsigned long count = ta->mover_state.record_size;
int did_something = 0;
unsigned long long max_read;
unsigned long long want_window_off;
unsigned long block_size;
unsigned long want_blockno;
unsigned long cur_blockno;
unsigned n_avail, n_read, record_off;
char * data;
unsigned long done_count;
ndmp9_error error;
again:
n_read = n_avail = ndmchan_n_avail (ch);
if (n_avail == 0) {
/* allow to drain */
return did_something;
}
if (ta->pending_change_after_drain) {
if (ndmchan_n_ready (ch) > 0) {
/* allow to drain */
} else {
ndmta_mover_apply_pending (sess);
did_something++;
}
return did_something;
}
if (n_read > ta->mover_state.bytes_left_to_read)
n_read = ta->mover_state.bytes_left_to_read;
if (n_read == 0) {
/* Active, but paused awaiting MOVER_READ request */
return did_something; /* mover blocked */
}
if (ta->mover_want_pos < ta->mover_state.window_offset
|| ta->mover_want_pos >= ta->mover_window_end) {
ndmta_mover_pause_pending (sess, NDMP9_MOVER_PAUSE_SEEK);
goto again;
}
max_read = ta->mover_window_end - ta->mover_want_pos;
if (n_read > max_read)
n_read = max_read;
want_window_off = ta->mover_want_pos - ta->mover_state.window_offset;
/* make an estimate of the block size - the tape agent's block size, or
* if it's in variable block size mode, the mover's record size: "When
* in variable block mode, as indicated by a tape block_size value of
* zero, the mover record size defines the actual block size used by
* the tape subsystem." (NDMPv4 RFC, Section 3.6.2.1) */
block_size = ta->tape_state.block_size.value;
if (!block_size)
block_size = ta->mover_state.record_size;
want_blockno = ta->mover_window_first_blockno + want_window_off / block_size;
if (ta->tb_blockno != want_blockno) {
unsigned long xsr_count, xsr_resid;
ndmos_tape_sync_state(sess);
cur_blockno = ta->tape_state.blockno.value;
if (cur_blockno < want_blockno) {
xsr_count = want_blockno - cur_blockno;
error = ndmos_tape_mtio (sess, NDMP9_MTIO_FSR,
xsr_count, &xsr_resid);
if (error == NDMP9_EOF_ERR) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
if (error != NDMP9_NO_ERR) {
ndmta_mover_halt_pending (sess,
NDMP9_MOVER_HALT_MEDIA_ERROR);
goto again;
}
if (xsr_resid > 0) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
} else if (cur_blockno > want_blockno) {
xsr_count = cur_blockno - want_blockno;
error = ndmos_tape_mtio (sess, NDMP9_MTIO_BSR,
xsr_count, &xsr_resid);
if (error != NDMP9_NO_ERR || xsr_resid > 0) {
ndmta_mover_halt_pending (sess,
NDMP9_MOVER_HALT_MEDIA_ERROR);
goto again;
}
} else {
/* in position */
}
data = ta->tape_buffer;
done_count = 0;
error = ndmos_tape_read (sess, data, count, &done_count);
did_something++;
if (error == NDMP9_EOF_ERR) {
ndmta_mover_pause_pending (sess,
NDMP9_MOVER_PAUSE_EOF);
goto again;
}
if (error != NDMP9_NO_ERR || done_count != count) {
ndmta_mover_halt_pending (sess,
NDMP9_MOVER_HALT_MEDIA_ERROR);
goto again;
}
ta->tb_blockno = want_blockno;
/* re-calcluate this, since record_size may be > block_size, in which
* case the record_num may not change for each block read from tape */
ta->mover_state.record_num = ta->mover_want_pos / ta->mover_state.record_size;
}
record_off = ta->mover_want_pos % ta->mover_state.record_size;
n_avail = ta->mover_state.record_size - record_off;
if (n_read > n_avail)
n_read = n_avail;
data = &ta->tape_buffer[record_off];
bcopy (data, ch->data + ch->end_ix, n_read);
ch->end_ix += n_read;
ta->mover_state.bytes_moved += n_read;
ta->mover_want_pos += n_read;
ta->mover_state.bytes_left_to_read -= n_read;
did_something++;
goto again; /* do as much as possible */
}