[LU-7188] flock: Function not implemented

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.8.0
• Type: Bug
• Priority: Major
• Reporter: Giuseppe Di Natale (Inactive)
• Assignee: WC Triage
• Resolution: Not a Bug
• Labels: llnl

Environment

lustre-2.7.59-2.6.32_504.16.2.1chaos.ch5.3.x86_64_g01ca899.x86_64

• Severity: 3

Description

flock call fails on 2.7.59

open("test_file", O_WRONLY|O_CREAT, 0700) = 3
flock(3, LOCK_UN)                       = -1 ENOSYS (Function not implemented)

We have have 4 MDSs, but this error occurs whether or not the directory is striped. No error messages or failures appear in our console, dmesg, or lctl (default masks) logs.

Comments

[Giuseppe Di Natale (Inactive)]

This is a test system. We can obtain any information to help diagnose the issue. flock also succeeded on a Lustre 2.5.3 file system.

[Oleg Drokin]

did you try mounting with "-o flock" on the client?

[Giuseppe Di Natale (Inactive)]

The unimplemented function after looking at lctl debug logs.

00000080:00000001:7.0:1442598773.130534:0:27557:0:(file.c:3105:ll_file_noflock()) Process entered

[Giuseppe Di Natale (Inactive)]

No we didn't. We will do that now.

[Oleg Drokin]

ll_file_noflock is only called when mounted without flock option of with -o noflock.
-o flock or -o localflock would install different handlers for flock functionality.

[Giuseppe Di Natale (Inactive)]

That fixed it. Not a bug. Apologies!