/*
* Read code for Storage daemon
+ *
* Kern Sibbald, November MM
+ *
+ * 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
#include "stored.h"
/* Forward referenced subroutines */
-
-/* Variables used by Child process */
-/* Global statistics */
-/* Note, these probably should be in shared memory so that
- * they are truly global for all processes
- */
-extern struct s_shm *shm; /* shared memory structure */
-extern int FiledDataChan; /* File daemon data channel (port) */
+static void get_session_record(DEVICE *dev, DEV_RECORD *rec, SESSION_LABEL *sessrec);
/* Responses sent to the File daemon */
BSOCK *ds;
BSOCK *fd_sock = jcr->file_bsock;
int ok = TRUE;
+ int done = FALSE;
DEVICE *dev;
- DEV_RECORD rec;
+ DEV_RECORD *rec;
DEV_BLOCK *block;
- char *hdr, *p;
-
+ POOLMEM *hdr;
+ SESSION_LABEL sessrec; /* session record */
+ uint32_t BlockNumber = 0;
Dmsg0(20, "Start read data.\n");
dev = jcr->device->dev;
+ memset(&sessrec, 0, sizeof(sessrec));
/* Tell File daemon we will send data */
bnet_fsend(fd_sock, OK_data);
block = new_block(dev);
- /* Find out if we were passed multiple volumes */
- jcr->NumVolumes = 1;
- jcr->CurVolume = 1;
- /* Scan through VolumeNames terminating them and counting them */
- for (p = jcr->VolumeName; p && *p; ) {
- p = strchr(p, '|'); /* volume name separator */
- if (p) {
- *p++ = 0; /* Terminate name */
- jcr->NumVolumes++;
- }
+ create_vol_list(jcr);
+ if (jcr->NumVolumes == 0) {
+ Jmsg(jcr, M_FATAL, 0, _("No Volume names found for restore.\n"));
+ free_block(block);
+ free_vol_list(jcr);
+ return 0;
}
- Dmsg1(20, "Found %d volumes names to restore.\n", jcr->NumVolumes);
+ Dmsg2(200, "Found %d volumes names to restore. First=%s\n", jcr->NumVolumes,
+ jcr->VolList->VolumeName);
+
+ pm_strcpy(&jcr->VolumeName, jcr->VolList->VolumeName);
/*
* Ready device for reading, and read records
*/
if (!acquire_device_for_read(jcr, dev, block)) {
free_block(block);
+ free_vol_list(jcr);
return 0;
}
- memset(&rec, 0, sizeof(rec));
- rec.data = ds->msg; /* use socket message buffer */
- hdr = (char *) get_pool_memory(PM_MESSAGE);
+ rec = new_record();
+ free_pool_memory(rec->data);
+ rec->data = ds->msg; /* use socket message buffer */
+ hdr = get_pool_memory(PM_MESSAGE);
/*
- * ****FIXME**** enhance this to look for
- * more things than just a session.
+ * Read records, apply BSR filtering, and return any that are
+ * matched.
*/
- for ( ;ok; ) {
- DEV_RECORD *record; /* for reading label of multi-volumes */
-
- if (job_cancelled(jcr)) {
+ for ( ; ok && !done; ) {
+ if (job_canceled(jcr)) {
ok = FALSE;
break;
}
/* Read Record */
- Dmsg1(500, "Main read_record. rem=%d\n", rec.remainder);
- if (!read_record(dev, block, &rec)) {
- Dmsg1(500, "Main read record failed. rem=%d\n", rec.remainder);
+ Dmsg1(500, "Main read_record. rem=%d\n", rec->remainder);
+
+ if (block_is_empty(block) && !read_block_from_device(jcr, dev, block, CHECK_BLOCK_NUMBERS)) {
+ Dmsg1(500, "Main read record failed. rem=%d\n", rec->remainder);
if (dev->state & ST_EOT) {
- if (rec.remainder) {
- Dmsg0(500, "Not end of record.\n");
- }
- Dmsg2(90, "NumVolumes=%d CurVolume=%d\n", jcr->NumVolumes, jcr->CurVolume);
- if (jcr->NumVolumes > 1 && jcr->CurVolume < jcr->NumVolumes) {
- close_dev(dev);
- for (p=jcr->VolumeName; *p++; ) /* skip to next volume name */
- { }
- jcr->CurVolume++;
- Dmsg1(20, "There is another volume %s.\n", p);
- strcpy(jcr->VolumeName, p);
- dev->state &= ~ST_READ;
- if (!acquire_device_for_read(jcr, dev, block)) {
- Emsg2(M_ERROR, 0, "Cannot open Dev=%s, Vol=%s\n", dev_name(dev), p);
- ok = FALSE;
- break;
- }
- record = new_record();
- Dmsg1(500, "read record after new tape. rem=%d\n", record->remainder);
- read_record(dev, block, record); /* read vol label */
- dump_label_record(dev, record, 0);
- free_record(record);
- continue;
+ DEV_RECORD *record;
+ if (!mount_next_read_volume(jcr, dev, block)) {
+ break;
}
- Dmsg0(90, "End of Device reached.\n");
- break; /* End of Tape */
- }
- if (dev->state & ST_EOF) {
+ /* Read and discard Volume Label */
+ record = new_record();
+ read_block_from_device(jcr, dev, block, NO_BLOCK_NUMBER_CHECK);
+ read_record_from_block(block, record);
+ get_session_record(dev, record, &sessrec);
+ free_record(record);
+ /* Now, continue to read the records on this volume */
+
+ } else if (dev->state & ST_EOF) {
Dmsg0(90, "Got End of File. Trying again ...\n");
continue; /* End of File */
+ } else if (dev->state & ST_SHORT) {
+ continue;
+ } else {
+ /* I/O error -- or non-standard end of tape */
+ Dmsg0(000, "I/O error, bailing out.\n");
+ ok = FALSE;
+ break;
}
+ }
- Emsg2(M_ABORT, 0, "Read error on Record Header %s ERR=%s\n", dev_name(dev), strerror(errno));
+ if (!block_is_empty(block) && !match_bsr_block(jcr->bsr, block)) {
+ Dmsg5(100, "reject Blk=%u blen=%u bVer=%d SessId=%u SessTim=%u\n",
+ block->BlockNumber, block->block_len, block->BlockVer,
+ block->VolSessionId, block->VolSessionTime);
+ empty_block(block); /* force read next block */
+ continue;
}
- /* Some sort of label? */
- if (rec.FileIndex < 0) {
- Dmsg1(40, "Got label = %d\n", rec.FileIndex);
- if (rec.FileIndex == EOM_LABEL) { /* end of tape? */
+ for (rec->state=0; !is_block_empty(rec); ) {
+
+ if (!read_record_from_block(block, rec)) {
+ break;
+ }
+ /*
+ * At this point, we have at least a record header.
+ * Now decide if we want this record or not, but remember
+ * before accessing the record, we may need to read again to
+ * get all the data.
+ */
+
+ if (rec->FileIndex == EOM_LABEL) { /* end of tape? */
Dmsg0(40, "Get EOM LABEL\n");
+ rec->remainder = 0;
break; /* yes, get out */
}
- continue; /* ignore other labels */
- }
- if (rec.VolSessionId != jcr->read_VolSessionId ||
- rec.VolSessionTime != jcr->read_VolSessionTime) {
- Dmsg0(50, "Ignore record ids not equal\n");
- continue; /* ignore */
- }
-
- /* Generate Header parameters and send to File daemon
- * Note, we build header in hdr buffer to avoid wiping
- * out the data record
- */
- ds->msg = hdr;
- if (!bnet_fsend(ds, rec_header, rec.VolSessionId, rec.VolSessionTime,
- rec.FileIndex, rec.Stream, rec.data_len)) {
- Dmsg1(30, ">filed: Error Hdr=%s\n", ds->msg);
- ds->msg = rec.data;
- ok = FALSE;
- break;
- } else {
- Dmsg1(30, ">filed: Hdr=%s\n", ds->msg);
- }
+ /* Some sort of label? */
+ if (rec->FileIndex < 0) {
+ get_session_record(dev, rec, &sessrec);
+ continue;
+ } /* end if label record */
- ds->msg = rec.data; /* restore data record address */
- /* Send data record to File daemon */
- ds->msglen = rec.data_len;
- Dmsg1(40, ">filed: send %d bytes data.\n", ds->msglen);
- if (!bnet_send(ds)) {
- Dmsg0(0, "Error sending to FD\n");
- Jmsg1(jcr, M_FATAL, 0, _("Error sending to File daemon. ERR=%s\n"),
- bnet_strerror(ds));
- ok = FALSE;
- }
- }
+ /* Match BSR against current record */
+ if (jcr->bsr) {
+ int stat = match_bsr(jcr->bsr, rec, &dev->VolHdr, &sessrec);
+ if (stat == -1) { /* no more possible matches */
+ done = TRUE;
+ break;
+ } else if (stat == 0) { /* no match */
+ Dmsg0(50, "BSR rejected record\n");
+ rec->remainder = 0;
+ continue;
+ }
+ } else {
+ /* Old way, deprecated */
+ if (rec->VolSessionId != jcr->read_VolSessionId ||
+ rec->VolSessionTime != jcr->read_VolSessionTime) {
+ Dmsg0(50, "Ignore record ids not equal\n");
+ rec->remainder = 0;
+ continue; /* ignore */
+ }
+ }
+
+ if (block->block_read) {
+ if (BlockNumber != block->BlockNumber) {
+ Jmsg(jcr, M_ERROR, 0, _("Invalid block number. Expected %u, got %u\n"),
+ BlockNumber, block->BlockNumber);
+ }
+ BlockNumber = block->BlockNumber + 1;
+ block->block_read = false;
+ }
+
+ if (is_partial_record(rec)) {
+ break; /* Go read full record */
+ }
+
+ /*
+ * We "finally" have a full record here. Now
+ * generate Header parameters and send to File daemon
+ * Note, we build header in hdr buffer to avoid wiping
+ * out the data record
+ */
+ ds->msg = hdr;
+ Dmsg5(400, "Send to FD: SessId=%u SessTim=%u FI=%d Strm=%d, len=%d\n",
+ rec->VolSessionId, rec->VolSessionTime, rec->FileIndex, rec->Stream,
+ rec->data_len);
+ if (!bnet_fsend(ds, rec_header, rec->VolSessionId, rec->VolSessionTime,
+ rec->FileIndex, rec->Stream, rec->data_len)) {
+ Dmsg1(30, ">filed: Error Hdr=%s\n", ds->msg);
+ hdr = ds->msg;
+ ds->msg = rec->data;
+ Jmsg1(jcr, M_FATAL, 0, _("Error sending to File daemon. ERR=%s\n"),
+ bnet_strerror(ds));
+ ok = FALSE;
+ break;
+ } else {
+ Dmsg1(30, ">filed: Hdr=%s\n", ds->msg);
+ }
+
+ hdr = ds->msg; /* restore hdr buffer */
+ ds->msg = rec->data; /* restore data record address */
+
+ /* Send data record to File daemon */
+ ds->msglen = rec->data_len;
+ Dmsg1(40, ">filed: send %d bytes data.\n", ds->msglen);
+ if (!bnet_send(ds)) {
+ Pmsg1(000, "Error sending to FD. ERR=%s\n", bnet_strerror(ds));
+ Dmsg1(100, "Hdr=%s\n", hdr);
+ Dmsg1(100, "data=%s\n", ds->msg);
+ Jmsg1(jcr, M_FATAL, 0, _("Error sending to File daemon. ERR=%s\n"),
+ bnet_strerror(ds));
+ ok = FALSE;
+ break;
+ }
+ } /* end for loop reading records */
+ } /* end for loop reading blocks */
/* Send end of data to FD */
- bnet_sig(ds, BNET_EOF);
+ bnet_sig(ds, BNET_EOD);
- if (!release_device(jcr, dev, block)) {
+ if (!release_device(jcr, dev)) {
ok = FALSE;
}
free_pool_memory(hdr);
free_block(block);
+ rec->data = NULL; /* previously released */
+ free_record(rec);
+ free_vol_list(jcr);
Dmsg0(30, "Done reading.\n");
return ok ? 1 : 0;
}
+
+static void get_session_record(DEVICE *dev, DEV_RECORD *rec, SESSION_LABEL *sessrec)
+{
+ char *rtype;
+ memset(sessrec, 0, sizeof(sessrec));
+ switch (rec->FileIndex) {
+ case PRE_LABEL:
+ rtype = "Fresh Volume Label";
+ break;
+ case VOL_LABEL:
+ rtype = "Volume Label";
+ unser_volume_label(dev, rec);
+ break;
+ case SOS_LABEL:
+ rtype = "Begin Session";
+ unser_session_label(sessrec, rec);
+ break;
+ case EOS_LABEL:
+ rtype = "End Session";
+ break;
+ case EOM_LABEL:
+ rtype = "End of Media";
+ break;
+ default:
+ rtype = "Unknown";
+ break;
+ }
+ Dmsg5(10, "%s Record: VolSessionId=%d VolSessionTime=%d JobId=%d DataLen=%d\n",
+ rtype, rec->VolSessionId, rec->VolSessionTime, rec->Stream, rec->data_len);
+}
projects / bacula / bacula / blobdiff