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r222389 introduced a case where the NFSv4 client could

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loop in nfscl_getcl() when a forced dismount is in progress,
because nfsv4_lock() will return 0 without sleeping when
MNTK_UNMOUNTF is set.
This patch fixes it so it won't loop calling nfsv4_lock()
for this case.

MFC after:	2 weeks
This commit is contained in:
Rick Macklem 2011-07-13 00:48:36 +00:00
parent 134e789b67
commit 305a0c9111
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=223971
1 changed files with 2 additions and 1 deletions
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3
sys/fs/nfsclient/nfs_clstate.c
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@ -761,7 +761,8 @@ nfscl_getcl(vnode_t vp, struct ucred *cred, NFSPROC_T *p,
FREE((caddr_t)newclp, M_NFSCLCLIENT);
}
NFSLOCKCLSTATE();
while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock)
while ((clp->nfsc_flags & NFSCLFLAGS_HASCLIENTID) == 0 && !igotlock &&
(mp->mnt_kern_flag & MNTK_UNMOUNTF) == 0)
igotlock = nfsv4_lock(&clp->nfsc_lock, 1, NULL,
NFSCLSTATEMUTEXPTR, mp);
if (!igotlock)