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

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

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.