Date: Sun, 23 Apr 2017 22:56:40 +0000 From: Rick Macklem <rmacklem@uoguelph.ca> To: "freebsd-fs@freebsd.org" <freebsd-fs@freebsd.org> Subject: optionally enable the NFSv4 server to allow write opens for reading Message-ID: <YTXPR01MB01897D428DD829C7A9DEC284DD1C0@YTXPR01MB0189.CANPRD01.PROD.OUTLOOK.COM>
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When a client such as the FreeBSD one does a write of a partial block, it w=
ill first
read the block in. If the file is opened Write only over NFSv4, the client =
can try
using this open for the Read. If the server (such as the FreeBSD one in hea=
d, etc)
doesn't allow this, it can reply with NFSERR_OPENMODE and the client must f=
ind
another way to do the Read, such as using what are called a "special statei=
d".
The attached patch modifies the FreeBSD NFSv4 server to allow use of a Writ=
e Open
for Read operations (this is allowed by the RFCs).
Does this sound reasonable to others to do? rick
ps: You can review/test the patch, but I am mainly wondering if doing this =
seems like
a good idea to others?=
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Content-Type: application/octet-stream; name="writeopenforread.patch"
Content-Description: writeopenforread.patch
Content-Disposition: attachment; filename="writeopenforread.patch"; size=1055;
creation-date="Sun, 23 Apr 2017 22:56:35 GMT";
modification-date="Sun, 23 Apr 2017 22:56:35 GMT"
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