[LU-12334] Print error message when "lfs mirror verify" finds different checksums

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.12.1
• Type: Improvement
• Priority: Major
• Reporter: Li Xi
• Assignee: Li Xi
• Resolution: Fixed

Description

When two replica has different data, 'lfs mirror verify' will exit with errno 22, but won't print any error message:

[root@server17-el7-vm2 ~]# lfs mirror verify /mnt/global/mirror 
[root@server17-el7-vm2 ~]# echo $?
22
[root@server17-el7-vm2 ~]# lfs mirror verify /mnt/global/mirror -v
CRC-32 checksum value for chunk [0, 0xffffffffffffffff):
Mirror 1:       0xcb49e137
Mirror 2:       0x96c2baec

This is confusing, since people would expect the file doesn't have problem.

Comments

[Li Xi]

This has been fixed in "LU-10258 lfs: lfs mirror copy command", but the fix is not in 2.12.2.

		/* compare CRC-32 checksum values */
		for (i = 1; i < chunk->mirror_count; i++) {
			if (crc_array[i] != crc_array[0]) {
				rc = -EINVAL;
				if (!verbose)
					goto error;

				fprintf(stderr,
					"%s: chunk "DEXT" has different checksum value on mirror %u and mirror %u.\n",
					progname, PEXT(&chunk->chunk),
					chunk->mirror_id[0],
					chunk->mirror_id[i]);
			}
		}