Bug 104261

Summary:	lockfile fails on fuse encfs
Product:	File System	Reporter:	Michael S. Tsirkin (m.s.tsirkin)
Component:	Other	Assignee:	fs_other
Status:	NEW ---
Severity:	normal	CC:	miklos, szg00000
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	4.2	Subsystem:
Regression:	No	Bisected commit-id:

Description Michael S. Tsirkin 2015-09-09 08:37:36 UTC

I have a directory mounted with encfs:
encfs -o nonempty /home/mst/Encrypted /home/mst/Private

lockfile in this directory fails:
$ lockfile -r 1 -s 1 $HOME/Private/Calendar.ics.lock
lockfile: Try praying, giving up on "/home/mst/Private/Calendar.ics.lock"

but works fine if I run lockfile under strace:
$ strace -f -o /dev/null lockfile -r 1 -s 1 $HOME/Private/Calendar.ics.lock
$ echo $?
0

This happens every time.

Note: I'm using 32 bit userspace and 64 bit kernel.

Comment 1 Michael S. Tsirkin 2015-09-09 08:45:20 UTC

I just reproduced this with a 32 bit kernel as well.
This is using Fedora 22.