[LU-5044] not include the .lustre directory in readdir output

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.7.0, Lustre 2.5.4
• Affects Version/s: Lustre 2.6.0
• Severity: 3
• Assignee: Di Wang
• Reporter: Di Wang

Description

Comments from Andreas

"I noticed that ".lustre" now appears in "ls -a" output, but I don't think that is supposed to happen. It might have been added when .lustre was created as a real inode in 2.4 or so?

This causes a problem because backup and other filesystem scanning tools will want to go into .lustre and read all the files there, and may also want to restore them after a crash, which could cause problems.

I think readdir needs to be fixed to not include the .lustre directory in readdir output. "

Issue Links

• is related to: LU-5955 llapi_semantic_traverse() and lfs find skip any child directory named .lustre

Comments

[Jodi Levi (Inactive)]

Patch landed to Master.

[Andreas Dilger]

I'd like to land the 11186 patch to b2_5 so that we can fix LU-5955 on the client.

[John Hammond]

See also http://review.whamcloud.com/#/c/11186/.

[Robert Read]

>Is this really a problem? Shouldn't we wait for some sign that this is causing an issue for some real program before we go adding special cases?

I suppose it means backup and recursive copy tools need to be configured to skip it, but other filesystems have similar "magic" directories that shouldn't be copied, so it's not that odd. I agree it would be simpler to leave it alone.

[John Hammond]

Is this really a problem? Shouldn't we wait for some sign that this is causing an issue for some real program before we go adding special cases?

[Robert Read]

It would be good to include tests (if we don't have them already) that other uses of .lustre, such as open by fid from userspace, still work as well.

[Di Wang]

http://review.whamcloud.com/10286

[nasf (Inactive)]

Currently, .lustre/lost+found is used for LFSCK, if we want to make .lustre to be invisible for readdir, then we need some especial tools to read the .lustre, then the administrator can check the orphans under .lustre/lost+found.