Re: Regression in 5.1.20: Reading long directory fails

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On Wed, Aug 28, 2019 at 01:29:00PM -0500, Jason L Tibbitts III wrote:
> If I had any idea how to do that, I happily would.  I'm certainly
> willing to learn.  At least I can run strace to see where ls bombs:

Somewhat of a caveman, I might start at the code for getdents, sprinkle
printk's around until I get down to the relevant code in the NFS
layer....  There's probably a better way to do it with tracing.

> getdents64(5, 0x7fc13afaf040, 262144)   = -1 EIO (Input/output error)
> 
> bcodding on IRC mentioned that is a rather large count.  Does make me
> wonder if the server is weirding out and sending the client bogus data.
> Certainly a server reboot, or maybe even just unmounting and remounting
> the filesystem or copying the data to another filesystem would tell me
> that.  In any case, as soon as I am able to mess with that server, I'll
> know more.

Might also be worth capturing the network traffic and checking whether
wireshark thinks the server replies are valid xdr.

--b.



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