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Code Issues Releases Activity

Fix two vnode locking problems in nfsd_recalldelegation() in the

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experimental NFSv4 server. The first was a bogus use of VOP_ISLOCKED()
in a KASSERT() and the second was the need to lock the vnode for the
nfsrv_checkremove() call. Also, delete a "__unused" that was bogus,
since the argument is used.

Reviewed by:	zack.kirsch at isilon.com
MFC after:	2 weeks
This commit is contained in:
Rick Macklem 2010-12-17 22:18:09 +00:00
parent e956db1e11
commit d6ec8427bc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=216510
1 changed files with 8 additions and 4 deletions
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12
sys/fs/nfsserver/nfs_nfsdstate.c
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@ -4275,7 +4275,7 @@ nfsrv_clientconflict(struct nfsclient *clp, int *haslockp, __unused vnode_t vp,
*/
static int
nfsrv_delegconflict(struct nfsstate *stp, int *haslockp, NFSPROC_T *p,
__unused vnode_t vp)
vnode_t vp)
{
struct nfsclient *clp = stp->ls_clp;
int gotlock, error, retrycnt, zapped_clp;
@ -4568,8 +4568,6 @@ nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p)
int32_t starttime;
int error;
KASSERT(!VOP_ISLOCKED(vp), ("vp %p is locked", vp));
/*
* First, check to see if the server is currently running and it has
* been called for a regular file when issuing delegations.
@ -4578,6 +4576,7 @@ nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p)
nfsrv_issuedelegs == 0)
return;
KASSERT((VOP_ISLOCKED(vp) != LK_EXCLUSIVE), ("vp %p is locked", vp));
/*
* First, get a reference on the nfsv4rootfs_lock so that an
* exclusive lock cannot be acquired by another thread.
@ -4593,7 +4592,12 @@ nfsd_recalldelegation(vnode_t vp, NFSPROC_T *p)
NFSGETNANOTIME(&mytime);
starttime = (u_int32_t)mytime.tv_sec;
do {
error = nfsrv_checkremove(vp, 0, p);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
if ((vp->v_iflag & VI_DOOMED) == 0)
error = nfsrv_checkremove(vp, 0, p);
else
error = EPERM;
VOP_UNLOCK(vp, 0);
if (error == NFSERR_DELAY) {
NFSGETNANOTIME(&mytime);
if (((u_int32_t)mytime.tv_sec - starttime) >