[LU-14136] lfs mirror extend prints confusing error messages

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Severity: 3
• Assignee: John Hammond
• Reporter: John Hammond

Description

In some error cases (including full devices) lfs mirror extend prints confusing error messages and exits with the wrong exit status:

# lfs setstripe -p ddn_ssd -c2 f0
# dd if=/dev/zero of=f0 bs=1M
dd: error writing ‘f0’: No space left on device
1321+0 records in
1320+0 records out
1384222720 bytes (1.4 GB) copied, 39.7723 s, 34.8 MB/s
# lfs df -h -p ddn_ssd
UUID                       bytes        Used   Available Use% Mounted on
lustre-MDT0000_UUID       122.4M        2.1M      109.4M   2% /mnt/lustre[MDT:0]
lustre-MDT0001_UUID       122.4M        1.8M      109.6M   2% /mnt/lustre[MDT:1]
lustre-OST0000_UUID       732.7M      677.4M      656.0K 100% /mnt/lustre[OST:0]
lustre-OST0001_UUID       732.7M      677.3M      752.0K 100% /mnt/lustre[OST:1]

filesystem_summary:         1.4G        1.3G        1.4M 100% /mnt/lustre

# lfs mirror extend -N -p ddn_ssd f0
lfs mirror extend: cannot create composite file '/mnt/lustre/.
                                                                 :VOLATILE:0000:10E609C1': No space \
left on device
error: lfs mirror extend: f0: cannot create volatile file: Operation not permitted
# echo $?
1