fs/nfs/nfs_commonsubs.c

188 static void nfsv4_wanted(struct nfsv4lock *lp);
1841 nfsv4_lock(struct nfsv4lock *lp, int iwantlock, int *isleptp,
1854 	    if (!(lp->nfslock_lock & NFSV4LOCK_LOCK) &&
1855 		lp->nfslock_usecnt == 0) {
1856 		lp->nfslock_lock &= ~NFSV4LOCK_LOCKWANTED;
1857 		lp->nfslock_lock |= NFSV4LOCK_LOCK;
1860 	    lp->nfslock_lock |= NFSV4LOCK_LOCKWANTED;
1862 	while (lp->nfslock_lock & (NFSV4LOCK_LOCK | NFSV4LOCK_LOCKWANTED)) {
1864 			lp->nfslock_lock &= ~NFSV4LOCK_LOCKWANTED;
1867 		lp->nfslock_lock |= NFSV4LOCK_WANTED;
1870 		(void) nfsmsleep(&lp->nfslock_lock, mutex,
1872 		if (iwantlock && !(lp->nfslock_lock & NFSV4LOCK_LOCK) &&
1873 		    lp->nfslock_usecnt == 0) {
1874 			lp->nfslock_lock &= ~NFSV4LOCK_LOCKWANTED;
1875 			lp->nfslock_lock |= NFSV4LOCK_LOCK;
1888 nfsv4_unlock(struct nfsv4lock *lp, int incref)
1891 	lp->nfslock_lock &= ~NFSV4LOCK_LOCK;
1893 		lp->nfslock_usecnt++;
1894 	nfsv4_wanted(lp);
1901 nfsv4_relref(struct nfsv4lock *lp)
1904 	if (lp->nfslock_usecnt <= 0)
1906 	lp->nfslock_usecnt--;
1907 	if (lp->nfslock_usecnt == 0)
1908 		nfsv4_wanted(lp);
1921 nfsv4_getref(struct nfsv4lock *lp, int *isleptp, void *mutex,
1931 	while (lp->nfslock_lock & NFSV4LOCK_LOCK) {
1934 		lp->nfslock_lock |= NFSV4LOCK_WANTED;
1937 		(void) nfsmsleep(&lp->nfslock_lock, mutex,
1943 	lp->nfslock_usecnt++;
1951 nfsv4_getref_nonblock(struct nfsv4lock *lp)
1954 	if ((lp->nfslock_lock & NFSV4LOCK_LOCK) != 0)
1957 	lp->nfslock_usecnt++;
1965 nfsv4_testlock(struct nfsv4lock *lp)
1968 	if ((lp->nfslock_lock & NFSV4LOCK_LOCK) == 0 &&
1969 	    lp->nfslock_usecnt == 0)
1978 nfsv4_wanted(struct nfsv4lock *lp)
1981 	if (lp->nfslock_lock & NFSV4LOCK_WANTED) {
1982 		lp->nfslock_lock &= ~NFSV4LOCK_WANTED;
1983 		wakeup((caddr_t)&lp->nfslock_lock);