Cross Reference: /src/sys/miscfs/genfs/genfs

Lines Matching defs:a_vp
725  *	a_dvp -> a_vp -> b_dvp -> b_vp,
727  * except if a_vp is a nondirectory in which case the lock order is:
729  *	a_dvp -> b_dvp -> b_vp -> a_vp,
731  * which can't violate ancestor->descendant because a_vp has no
733  * file systems can only lookup/lock/unlock, and we can't hold a_vp
757  * . the only pair of vnodes that may be identical is a_vp and b_vp.
760  * *a_vp, *b_dirent_ret, and *b_vp are left alone.
771 	struct vnode *a_vp, *b_vp;
804 	 * 2. Lookup a_vp.  May lock/unlock a_vp.
806 	error = ops->gro_lookup(mp, a_dvp, a_cnp, a_de_ret, &a_vp);
809 			a_vp = NULL;
813 		KASSERT(a_vp != NULL);
816 		if (a_vp == a_dvp) {
822 		if (a_vp == b_dvp) {
828 	KASSERT(a_vp != a_dvp);
829 	KASSERT(a_vp != b_dvp);
832 	 * 3. Lock a_vp, if it is a directory.
834 	 * We already ruled out a_vp == a_dvp (i.e., a_cnp is `.'), so
836 	 * a_vp == b_dvp, so this won't cause subsequent locking of
839 	 * If a_vp is a nondirectory, we can't hold it when we lookup
841 	 * and (b) b_vp turns out to be the same file as a_vp due to
843 	 * we've looked up b_vp.  Fortunately, if a_vp is a
847 	if (a_vp != NULL && a_vp->v_type == VDIR) {
848 		vn_lock(a_vp, LK_EXCLUSIVE | LK_RETRY);
849 		KASSERT(a_vp->v_mount == mp);
851 		if (a_vp->v_mountedhere != NULL) {
890 		 * find b_dvp/b_vp=a_dvp/a_vp something is wrong.
906 	 * 6. Lock a_vp, if it is a nondirectory.
908 	 * In this case a_vp is a leaf, so it is either equal to or
912 	if (a_vp != NULL && a_vp->v_type != VDIR) {
913 		vn_lock(a_vp, LK_EXCLUSIVE | LK_RETRY);
914 		KASSERT(a_vp->v_mount == mp);
919 	 * 7. Lock b_vp, if it is not a_vp.
921 	 * b_vp and a_vp may the same inode if they are hard links to
924 	if ((b_vp != NULL) && (b_vp != a_vp)) {
936 	KASSERT(a_missing_ok || (a_vp != NULL));
938 	KASSERT((a_vp == NULL) || (VOP_ISLOCKED(a_vp) == LK_EXCLUSIVE));
941 	*a_vp_ret = a_vp;
945 fail6:	if ((b_vp != NULL) && (b_vp != a_vp))
947 	if (a_vp != NULL && a_vp->v_type != VDIR)
948 		VOP_UNLOCK(a_vp);
952 fail3:	if (a_vp != NULL && a_vp->v_type == VDIR)
953 		VOP_UNLOCK(a_vp);
954 fail2:	if (a_vp != NULL)
955 		vrele(a_vp);
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