linux-kernel - Re: Solved - How to change the FSINFO for nfsd?

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Date:	Sun, 18 May 2008 01:57:33 +0800
From:	"P.V.Anthony" <pvantony@...gnet.com.sg>
To:	"J. Bruce Fields" <bfields@...ldses.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Solved - How to change the FSINFO for nfsd?

Quoting "J. Bruce Fields":
> I think you'reprobably barking up the wrong tree, but the max file size
> as returned by fsinfo is set in fs/nfsd/nfs3proc.c:nfsd3_proc_fsinfo().

Just in case someone needs to know this information. Please note that  
I am not a
programmer. I am just hacking away.

Most of the credit for the hack goes to the person in the forum  
mentioned below
for finding the Mac NFS behavior.
http://forums.creativecow.net/thread/8/975362

The changes done seem to work well.

I am dissapointed that Apple made changes to NFS to a point that we  
have to use an Apple NFS. I thought that NFS is open. Anyway with  
these changes, a Linux server can be used.

Anyway this problem only happens from with in the video editing application,
Final Cut Pro, an Apple product. I hope someday a good video editing  
application
comes to Linux. I am willing to pay for Linux video editing  
application. It must
be good that is.

Anyway here is the patch done.

------------------- start ------------------------------

pv at videoserver2 ~ $ diff -ruN
/usr/src/linux-2.6.22-gentoo-r8/fs/nfsd/nfs3proc.c.org
/usr/src/linux-2.6.22-gentoo-r8/fs/nfsd/nfs3proc.c
--- /usr/src/linux-2.6.22-gentoo-r8/fs/nfsd/nfs3proc.c.org 2008-05-09
13:07:19.000000000 +0800
+++ /usr/src/linux-2.6.22-gentoo-r8/fs/nfsd/nfs3proc.c 2008-05-13
23:54:56.000000000 +0800
@@ -555,7 +555,7 @@
resp->f_wtpref = max_blocksize;
resp->f_wtmult = PAGE_SIZE;
resp->f_dtpref = PAGE_SIZE;
- resp->f_maxfilesize = ~(u32) 0;
+ resp->f_maxfilesize = 0xffffffffffffffff;
resp->f_properties = NFS3_FSF_DEFAULT;

nfserr = fh_verify(rqstp, &argp->fh, 0, MAY_NOP);
@@ -570,7 +570,7 @@
if (sb->s_magic == 0x4d44 /* MSDOS_SUPER_MAGIC */) {
resp->f_properties = NFS3_FSF_BILLYBOY;
}
- resp->f_maxfilesize = sb->s_maxbytes;
+ resp->f_maxfilesize = 0xffffffffffffffff;
}

fh_put(&argp->fh);

---------------- end -------------------------------------------------

P.V.Anthony

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