[Lustre-discuss] strange symbolic link behavior on mdt?

[Kristen J. Webb]

I am testing symbolic link behaviour
and not getting the expected results.

In the simplest case, I create one valid
and one invalid link:

-rw-r--r-- 1 root root 0 Oct 13 11:17 exist
lrwxrwxrwx 1 root root 5 Oct 13 11:17 lexist -> exist
lrwxrwxrwx 1 root root 7 Oct 13 11:17 lnoexist -> noexist

When I look at the meta data through the ldiskfs mounted mdt
the link paths are not shown:

-rw-r--r-- 1 root root 0 Oct 13 11:17 exist
lrwxrwxrwx 1 root root 5 Oct 13 11:17 lexist
lrwxrwxrwx 1 root root 7 Oct 13 11:17 lnoexist

And trying to get a bit more info:

# file *
exist:    empty
lexist:   unreadable symlink `lexist' (Invalid argument)
lnoexist: unreadable symlink `lnoexist' (Invalid argument)


If I restart lustre by unmounting and re-mounting
all the lustre mount points (MDT, ODT's, client)
the link paths show up in the ldiskfs mounted mdt:

-rw-r--r-- 1 root root 0 Oct 13 11:17 exist
lrwxrwxrwx 1 root root 5 Oct 13 11:17 lexist -> exist
lrwxrwxrwx 1 root root 7 Oct 13 11:17 lnoexist -> noexist

file *
exist:    empty
lexist:   symbolic link to `exist'
lnoexist: broken symbolic link to `noexist'


I've also just tried just re-mounting the ldiskfs mount
point but that did not help.

Is there any way to correct this without having to restart lustre?

I experimented with running lfsck w/o restart all of lustre
but I could not see that it was running or had done anything
useful yet.

Kris
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Mr. Kristen J. Webb
Chief Technology Officer
Teradactyl LLC.
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Email: kwebb at teradactyl.com
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