logprint/log_dump.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2004-2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#include "libxfs.h"
#include "libxlog.h"

#include "logprint.h"

/*
 * Dump log blocks, not data
 */

void
xfs_log_dump(
	struct xlog		*log,
	int			fd,
	int			print_block_start)
{
	int			r;
	uint			last_cycle = -1;
	xfs_daddr_t		blkno, dupblkno;
	xlog_rec_header_t	*hdr;
	char			buf[XLOG_HEADER_SIZE];

	dupblkno = 0;
	hdr = (xlog_rec_header_t *)buf;
	xlog_print_lseek(log, fd, 0, SEEK_SET);
	for (blkno = 0; blkno < log->l_logBBsize; blkno++) {
		r = read(fd, buf, sizeof(buf));
		if (r < 0) {
			fprintf(stderr, _("%s: read error (%lld): %s\n"),
				__FUNCTION__, (long long)blkno,
				strerror(errno));
			continue;
		} else if (r == 0) {
			printf(_("%s: physical end of log at %lld\n"),
				__FUNCTION__, (long long)blkno);
			break;
		}

		if (CYCLE_LSN(be64_to_cpu(*(__be64 *)buf)) ==
				XLOG_HEADER_MAGIC_NUM && !print_no_data) {
			printf(_(
		"%6lld HEADER Cycle %d tail %d:%06d len %6d ops %d\n"),
				(long long)blkno,
				be32_to_cpu(hdr->h_cycle),
				CYCLE_LSN(be64_to_cpu(hdr->h_tail_lsn)),
				BLOCK_LSN(be64_to_cpu(hdr->h_tail_lsn)),
				be32_to_cpu(hdr->h_len),
				be32_to_cpu(hdr->h_num_logops));
		}

		if (xlog_get_cycle(buf) != last_cycle) {
			printf(_(
		"[%05lld - %05lld] Cycle 0x%08x New Cycle 0x%08x\n"),
				(long long)dupblkno, (long long)blkno,
				last_cycle, xlog_get_cycle(buf));
			last_cycle = xlog_get_cycle(buf);
			dupblkno = blkno;
		}
	}
}