[LU-4279] .lustre and .lustre/fid cannot by accessed by FID

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.6.0, Lustre 2.5.2
• Affects Version/s: Lustre 2.4.1
• Severity: 3
• Assignee: Bruno Faccini (Inactive)
• Reporter: Sebastien Buisson (Inactive)

Description

Hi,

We found a regression in the access by FID feature in Lustre 2.4. Indeed, stat by fid of .lustre/fid directory gets EINVAL.

This can be easily reproduced like this:

# lfs path2fid .lustre
[0x200000002:0x1:0x0]
# lfs path2fid .lustre/fid
[0x200000002:0x2:0x0]
# stat .lustre/fid/[0x200000002:0x2:0x0]
stat: cannot stat `<lustre mount point>/.lustre/fid/[0x200000002:0x2:0x0]': Invalid argument
# stat .lustre/fid/[0x200000002:0x1:0x0]
stat: cannot stat `<lustre mount point>/.lustre/fid/[0x200000002:0x1:0x0]': Invalid argument

The same commands just work fine on Lustre 2.1.6.

This is a big issue as Ganesha relies on this to work.

Thanks,
Sebastien.