> On Fri, Dec 17, 2021 at 5:07 PM <trondmy@xxxxxxxxxx> wrote: > > > > From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> > > > > According to RFC1813: "If count is 0, the WRITE will succeed and > > return a count of 0, barring errors due to permissions checking." > > Yes, I'm surprised we're not already doing this right. > > I wonder how far back this bug goes. > > The svc.c code is from 8154ef2776aa "NFSD: Clean up legacy NFS WRITE > argument XDR decoders", but the behavior might predate that code. The > nfsd_vfs_write() logic, I'm not sure I understand. > > We have a pynfs test for the v4 case (WRT4), but I guess we must have nothing > testing the v3 case. Hmm, need to try and remember this... I am slowly working on pnfs V3 test cases so I will try and make sure edge cases like this get tested. Frank
