[LU-3616] HSM restore for execute allows writes to file

• Type: Technical task
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.6.0, Lustre 2.5.1
• Affects Version/s: Lustre 2.5.0
• Labels: HSM
• Assignee: Bruno Faccini (Inactive)
• Reporter: John Hammond

Description

Using the Jul 22, 2013 HSM stack, executing a released file (and thereby triggering a restore) leaves the file writable while it's being executed.

# cd /mnt/lustre
# cp /bin/sleep SLEEP
# lfs hsm_archive SLEEP
# sleep 1
# lfs hsm_release SLEEP
# ./SLEEP 10 && echo DONE &
[1] 4243
# sleep 1
# pgrep -l SLEEP
4244 SLEEP
# cd /mnt/lustre2
# echo 'Hi!' > SLEEP
# cat SLEEP
Hi!
# -bash: line 238:  4244 Bus error               (core dumped) ./SLEEP 10

[1]+  Exit 135                ./SLEEP 10 && echo DONE  (wd: /mnt/lustre)
(wd now: /mnt/lustre2)