Example #1
0
/*
 * __txn_log_recover --
 *	Roll the log forward to recover committed changes.
 */
static int
__txn_log_recover(WT_SESSION_IMPL *session,
    WT_ITEM *logrec, WT_LSN *lsnp, WT_LSN *next_lsnp,
    void *cookie, int firstrecord)
{
	WT_RECOVERY *r;
	const uint8_t *end, *p;
	uint64_t txnid;
	uint32_t rectype;

	WT_UNUSED(next_lsnp);
	r = cookie;
	p = WT_LOG_SKIP_HEADER(logrec->data);
	end = (const uint8_t *)logrec->data + logrec->size;
	WT_UNUSED(firstrecord);

	/* First, peek at the log record type. */
	WT_RET(__wt_logrec_read(session, &p, end, &rectype));

	switch (rectype) {
	case WT_LOGREC_CHECKPOINT:
		if (r->metadata_only)
			WT_RET(__wt_txn_checkpoint_logread(
			    session, &p, end, &r->ckpt_lsn));
		break;

	case WT_LOGREC_COMMIT:
		WT_RET(__wt_vunpack_uint(&p, WT_PTRDIFF(end, p), &txnid));
		WT_UNUSED(txnid);
		WT_RET(__txn_commit_apply(r, lsnp, &p, end));
		break;
	}

	return (0);
}
Example #2
0
/*
 * __txn_log_recover --
 *	Roll the log forward to recover committed changes.
 */
static int
__txn_log_recover(WT_SESSION_IMPL *session,
    WT_ITEM *logrec, WT_LSN *lsnp, WT_LSN *next_lsnp,
    void *cookie, int firstrecord)
{
	WT_DECL_RET;
	WT_RECOVERY *r;
	uint64_t txnid_unused;
	uint32_t rectype;
	const uint8_t *end, *p;

	r = cookie;
	p = WT_LOG_SKIP_HEADER(logrec->data);
	end = (const uint8_t *)logrec->data + logrec->size;
	WT_UNUSED(firstrecord);

	/* First, peek at the log record type. */
	WT_RET(__wt_logrec_read(session, &p, end, &rectype));

	/*
	 * Record the highest LSN we process during the metadata phase.
	 * If not the metadata phase, then stop at that LSN.
	 */
	if (r->metadata_only)
		r->max_rec_lsn = *next_lsnp;
	else if (__wt_log_cmp(lsnp, &r->max_rec_lsn) >= 0)
		return (0);

	switch (rectype) {
	case WT_LOGREC_CHECKPOINT:
		if (r->metadata_only)
			WT_RET(__wt_txn_checkpoint_logread(
			    session, &p, end, &r->ckpt_lsn));
		break;

	case WT_LOGREC_COMMIT:
		if ((ret = __wt_vunpack_uint(
		    &p, WT_PTRDIFF(end, p), &txnid_unused)) != 0)
			WT_RET_MSG(
			    session, ret, "txn_log_recover: unpack failure");
		WT_RET(__txn_commit_apply(r, lsnp, &p, end));
		break;
	}

	return (0);
}
Example #3
0
/*
 * __curlog_logrec --
 *	Callback function from log_scan to get a log record.
 */
static int
__curlog_logrec(WT_SESSION_IMPL *session,
    WT_ITEM *logrec, WT_LSN *lsnp, WT_LSN *next_lsnp,
    void *cookie, int firstrecord)
{
	WT_CURSOR_LOG *cl;

	cl = cookie;
	WT_UNUSED(firstrecord);

	/* Set up the LSNs and take a copy of the log record for the cursor. */
	*cl->cur_lsn = *lsnp;
	*cl->next_lsn = *next_lsnp;
	WT_RET(__wt_buf_set(session, cl->logrec, logrec->data, logrec->size));

	/*
	 * Read the log header.  Set up the step pointers to walk the
	 * operations inside the record.  Get the record type.
	 */
	cl->stepp = WT_LOG_SKIP_HEADER(cl->logrec->data);
	cl->stepp_end = (uint8_t *)cl->logrec->data + logrec->size;
	WT_RET(__wt_logrec_read(session, &cl->stepp, cl->stepp_end,
	    &cl->rectype));

	/* A step count of 0 means the entire record. */
	cl->step_count = 0;

	/*
	 * Unpack the txnid so that we can return each
	 * individual operation for this txnid.
	 */
	if (cl->rectype == WT_LOGREC_COMMIT)
		WT_RET(__wt_vunpack_uint(&cl->stepp,
		    WT_PTRDIFF(cl->stepp_end, cl->stepp), &cl->txnid));
	else {
		/*
		 * Step over anything else.
		 * Setting stepp to NULL causes the next()
		 * method to read a new record on the next call.
		 */
		cl->stepp = NULL;
		cl->txnid = 0;
	}
	return (0);
}
Example #4
0
/*
 * __txn_printlog --
 *	Print a log record in a human-readable format.
 */
static int
__txn_printlog(
    WT_SESSION_IMPL *session, WT_ITEM *logrec, WT_LSN *lsnp, void *cookie)
{
	FILE *out;
	WT_LSN ckpt_lsn;
	const uint8_t *end, *p;
	const char *msg;
	uint64_t txnid;
	uint32_t fileid, rectype;
	int32_t start;

	out = cookie;

	p = (const uint8_t *)logrec->data + offsetof(WT_LOG_RECORD, record);
	end = (const uint8_t *)logrec->data + logrec->size;

	/* First, peek at the log record type. */
	WT_RET(__wt_logrec_read(session, &p, end, &rectype));

	if (fprintf(out, "  { \"lsn\" : [%" PRIu32 ",%" PRId64 "],\n",
	    lsnp->file, lsnp->offset) < 0)
		return (errno);

	switch (rectype) {
	case WT_LOGREC_CHECKPOINT:
		WT_RET(__wt_struct_unpack(session, p, WT_PTRDIFF(end, p),
		    WT_UNCHECKED_STRING(IQ), &ckpt_lsn.file, &ckpt_lsn.offset));
		if (fprintf(out, "    \"type\" : \"checkpoint\"\n") < 0 ||
		    fprintf(
		    out, "    \"ckpt_lsn\" : [%" PRIu32 ",%" PRId64 "],\n",
		    ckpt_lsn.file, ckpt_lsn.offset) < 0)
			return (errno);
		break;

	case WT_LOGREC_COMMIT:
		WT_RET(__wt_vunpack_uint(&p, WT_PTRDIFF(end, p), &txnid));
		if (fprintf(out, "    \"type\" : \"commit\"\n") < 0 ||
		    fprintf(out, "    \"txnid\" : %" PRIu64 ",\n", txnid) < 0)
			return (errno);
		WT_RET(__txn_commit_printlog(session, &p, end, out));
		break;

	case WT_LOGREC_FILE_SYNC:
		WT_RET(__wt_struct_unpack(session, p, WT_PTRDIFF(end, p),
		    WT_UNCHECKED_STRING(Ii), &fileid, &start));
		if (fprintf(out, "    \"type\" : \"file_sync\"\n") < 0 ||
		    fprintf(out, "    \"fileid\" : %" PRIu32 "\n",
		    fileid) < 0 ||
		    fprintf(out, "    \"start\" : %" PRId32 "\n", start) < 0)
			return (errno);
		break;

	case WT_LOGREC_MESSAGE:
		WT_RET(__wt_struct_unpack(session, p, WT_PTRDIFF(end, p),
		    WT_UNCHECKED_STRING(S), &msg));
		if (fprintf(out, "    \"type\" : \"message\"\n") < 0 ||
		    fprintf(out, "    \"message\" : \"%s\"\n", msg) < 0)
			return (errno);
		break;
	}

	if (fprintf(out, "  },\n") < 0)
		return (errno);

	return (0);
}
Example #5
0
/*
 * __txn_printlog --
 *	Print a log record in a human-readable format.
 */
static int
__txn_printlog(WT_SESSION_IMPL *session,
    WT_ITEM *rawrec, WT_LSN *lsnp, WT_LSN *next_lsnp,
    void *cookie, int firstrecord)
{
	WT_LOG_RECORD *logrec;
	WT_TXN_PRINTLOG_ARGS *args;
	const uint8_t *end, *p;
	const char *msg;
	uint64_t txnid;
	uint32_t fileid, lsnfile, lsnoffset, rectype;
	int32_t start;
	bool compressed;

	WT_UNUSED(next_lsnp);
	args = cookie;

	p = WT_LOG_SKIP_HEADER(rawrec->data);
	end = (const uint8_t *)rawrec->data + rawrec->size;
	logrec = (WT_LOG_RECORD *)rawrec->data;
	compressed = F_ISSET(logrec, WT_LOG_RECORD_COMPRESSED);

	/* First, peek at the log record type. */
	WT_RET(__wt_logrec_read(session, &p, end, &rectype));

	if (!firstrecord)
		WT_RET(__wt_fprintf(session, WT_STDOUT(session), ",\n"));

	WT_RET(__wt_fprintf(session, WT_STDOUT(session),
	    "  { \"lsn\" : [%" PRIu32 ",%" PRIu32 "],\n",
	    lsnp->l.file, lsnp->l.offset));
	WT_RET(__wt_fprintf(session, WT_STDOUT(session),
	    "    \"hdr_flags\" : \"%s\",\n", compressed ? "compressed" : ""));
	WT_RET(__wt_fprintf(session, WT_STDOUT(session),
	    "    \"rec_len\" : %" PRIu32 ",\n", logrec->len));
	WT_RET(__wt_fprintf(session, WT_STDOUT(session),
	    "    \"mem_len\" : %" PRIu32 ",\n",
	    compressed ? logrec->mem_len : logrec->len));

	switch (rectype) {
	case WT_LOGREC_CHECKPOINT:
		WT_RET(__wt_struct_unpack(session, p, WT_PTRDIFF(end, p),
		    WT_UNCHECKED_STRING(II), &lsnfile, &lsnoffset));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"type\" : \"checkpoint\",\n"));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"ckpt_lsn\" : [%" PRIu32 ",%" PRIu32 "]\n",
		    lsnfile, lsnoffset));
		break;

	case WT_LOGREC_COMMIT:
		WT_RET(__wt_vunpack_uint(&p, WT_PTRDIFF(end, p), &txnid));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"type\" : \"commit\",\n"));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"txnid\" : %" PRIu64 ",\n", txnid));
		WT_RET(__txn_oplist_printlog(session, &p, end, args->flags));
		break;

	case WT_LOGREC_FILE_SYNC:
		WT_RET(__wt_struct_unpack(session, p, WT_PTRDIFF(end, p),
		    WT_UNCHECKED_STRING(Ii), &fileid, &start));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"type\" : \"file_sync\",\n"));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"fileid\" : %" PRIu32 ",\n", fileid));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"start\" : %" PRId32 "\n", start));
		break;

	case WT_LOGREC_MESSAGE:
		WT_RET(__wt_struct_unpack(session, p, WT_PTRDIFF(end, p),
		    WT_UNCHECKED_STRING(S), &msg));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"type\" : \"message\",\n"));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"message\" : \"%s\"\n", msg));
		break;

	case WT_LOGREC_SYSTEM:
		WT_RET(__wt_struct_unpack(session, p, WT_PTRDIFF(end, p),
		    WT_UNCHECKED_STRING(II), &lsnfile, &lsnoffset));
		WT_RET(__wt_fprintf(session, WT_STDOUT(session),
		    "    \"type\" : \"system\",\n"));
		WT_RET(__txn_oplist_printlog(session, &p, end, args->flags));
		break;
	}

	WT_RET(__wt_fprintf(session, WT_STDOUT(session), "  }"));

	return (0);
}