Re: [PATCH] CIFS: fix FSCTL_SET_REPARSE_POINT SMB2_ioctl() call

["Aurélien Aptel" <aaptel@suse.com>]

Aurélien Aptel <aaptel@suse.com> writes:
> So it seems to me only possible explanation is the first, i.e.
> MaxOutputResponse > Connection.MaxTransactSize, somehow.

So I've dumped a few fields:

Connection.MaxTransactSize is set by the server in NEGPROT response.

Against my WS2016, MaxTransactSize = 8388608

But we do this:

	server->maxBuf = min_t(unsigned int, le32_to_cpu(rsp->MaxTransactSize),
			       SMB2_MAX_BUFFER_SIZE);

Since SMB2_MAX_BUFFER_SIZE = 65536, maxBuf is effectively SMB2_MAX_BUFFER_SIZE

And finally, the value used for ioctl MaxOutputResponse is
CIFSMaxBufSize, which is 16384.

I've tried setting MaxOutputResponse to server->maxBuf or
Connection.MaxTransactSize but it always fails the same way... so I
don't know. I guess it must say somewhere that ioctl() with no output
should set MaxOutputResponse to zero?

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Aurélien Aptel / SUSE Labs Samba Team
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