Date: Thu, 27 Dec 2001 11:38:31 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: hackers@freebsd.org Cc: re@freebsd.org Subject: More NFS fixes - patchset. Message-ID: <200112271938.fBRJcVH59048@apollo.backplane.com>
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This patchset fixes a race in the nfs_node code. Basically the
issue is that it is possible for the nfsnode (and the vnode) to
get ripped out from under us if vget() sleeps, so we have to retry
the operation.
I'd like to MFC this one to -stable.
-Matt
Matthew Dillon
<dillon@backplane.com>
Index: nfs/nfs_node.c
===================================================================
RCS file: /home/ncvs/src/sys/nfs/Attic/nfs_node.c,v
retrieving revision 1.36.2.2
diff -u -r1.36.2.2 nfs_node.c
--- nfs/nfs_node.c 26 Jun 2001 04:20:10 -0000 1.36.2.2
+++ nfs/nfs_node.c 27 Dec 2001 19:27:09 -0000
@@ -115,7 +115,7 @@
bcmp((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize))
continue;
vp = NFSTOV(np);
- if (vget(vp, LK_EXCLUSIVE, p))
+ if (vget(vp, LK_EXCLUSIVE|LK_SLEEPFAIL, p))
goto loop;
*npp = np;
return(0);
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