From: Derrick Brashear <shadow@dementia.org>
Date: Tue, 19 Jul 2005 15:44:53 +0000 (+0000)
Subject: vnrehash-avoid-cachecheck-change-20050618
X-Git-Tag: openafs-devel-1_5_0~434
X-Git-Url: https://git.michaelhowe.org/gitweb/?a=commitdiff_plain;h=ea20d8d6c244521bd72a42a4aef1f92bd03800e8;p=packages%2Fo%2Fopenafs.git

vnrehash-avoid-cachecheck-change-20050618


unlocking and locking lets us race and makes cacheCheck potentially go bad
---

diff --git a/src/vol/vnode.c b/src/vol/vnode.c
index ac922b595..3e4b45df4 100644
--- a/src/vol/vnode.c
+++ b/src/vol/vnode.c
@@ -321,6 +321,7 @@ VAllocVnode_r(Error * ec, Volume * vp, VnodeType type)
 	return NULL;
     vnodeNumber = bitNumberToVnodeNumber(bitNumber, class);
 
+ vnrehash:
     VNLog(2, 1, vnodeNumber);
     /* Prepare to move it to the new hash chain */
     newHash = VNODE_HASH(vp, vnodeNumber);
@@ -349,6 +350,10 @@ VAllocVnode_r(Error * ec, Volume * vp, VnodeType type)
 	    VOL_UNLOCK;
 	    ObtainWriteLock(&vnp->lock);
 	    VOL_LOCK;
+	    if (vnp->volumePtr->cacheCheck != vnp->cacheCheck) {
+		ReleaseWriteLock(&vnp->lock);
+		goto vnrehash;
+	    }
 	}
 #ifdef AFS_PTHREAD_ENV
 	vnp->writer = pthread_self();