[apple/xnu.git] / bsd / nfs / nfs_node.c

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Rick Macklem at The University of Guelph.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)nfs_node.c	8.6 (Berkeley) 5/22/95
 * FreeBSD-Id: nfs_node.c,v 1.22 1997/10/28 14:06:20 bde Exp $
 */


#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/malloc.h>

#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsnode.h>
#include <nfs/nfsmount.h>

#ifdef MALLOC_DEFINE
static MALLOC_DEFINE(M_NFSNODE, "NFS node", "NFS vnode private part");
#endif

LIST_HEAD(nfsnodehashhead, nfsnode) *nfsnodehashtbl;
u_long nfsnodehash;

#define TRUE	1
#define	FALSE	0

/*
 * Initialize hash links for nfsnodes
 * and build nfsnode free list.
 */
void
nfs_nhinit()
{
	nfsnodehashtbl = hashinit(desiredvnodes, M_NFSNODE, &nfsnodehash);
}

/*
 * Compute an entry in the NFS hash table structure
 */
u_long
nfs_hash(fhp, fhsize)
	register nfsfh_t *fhp;
	int fhsize;
{
	register u_char *fhpp;
	register u_long fhsum;
	register int i;

	fhpp = &fhp->fh_bytes[0];
	fhsum = 0;
	for (i = 0; i < fhsize; i++)
		fhsum += *fhpp++;
	return (fhsum);
}

/*
 * Look up a vnode/nfsnode by file handle.
 * Callers must check for mount points!!
 * In all cases, a pointer to a
 * nfsnode structure is returned.
 */
int nfs_node_hash_lock;

int
nfs_nget(mntp, fhp, fhsize, npp)
	struct mount *mntp;
	register nfsfh_t *fhp;
	int fhsize;
	struct nfsnode **npp;
{
	struct proc *p = current_proc();	/* XXX */
	struct nfsnode *np;
	struct nfsnodehashhead *nhpp;
	register struct vnode *vp;
	struct vnode *nvp;
	int error;

	/* Check for unmount in progress */
	if (mntp->mnt_kern_flag & MNTK_UNMOUNT) {
		*npp = 0;
		return (EPERM);
	}

	nhpp = NFSNOHASH(nfs_hash(fhp, fhsize));
loop:
	for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
		if (mntp != NFSTOV(np)->v_mount || np->n_fhsize != fhsize ||
		    bcmp((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize))
			continue;
		vp = NFSTOV(np);
		if (vget(vp, LK_EXCLUSIVE, p))
			goto loop;
		*npp = np;
		return(0);
	}
	/*
	 * Obtain a lock to prevent a race condition if the getnewvnode()
	 * or MALLOC() below happens to block.
	 */
	if (nfs_node_hash_lock) {
		while (nfs_node_hash_lock) {
			nfs_node_hash_lock = -1;
			tsleep(&nfs_node_hash_lock, PVM, "nfsngt", 0);
		}
		goto loop;
	}
	nfs_node_hash_lock = 1;

	/*
	 * Do the MALLOC before the getnewvnode since doing so afterward
	 * might cause a bogus v_data pointer to get dereferenced
	 * elsewhere if MALLOC should block.
	 */
	MALLOC_ZONE(np, struct nfsnode *, sizeof *np, M_NFSNODE, M_WAITOK);
		
	error = getnewvnode(VT_NFS, mntp, nfsv2_vnodeop_p, &nvp);
	if (error) {
		if (nfs_node_hash_lock < 0)
			wakeup(&nfs_node_hash_lock);
		nfs_node_hash_lock = 0;
		*npp = 0;
		FREE_ZONE(np, sizeof *np, M_NFSNODE);
		return (error);
	}
	vp = nvp;
	bzero((caddr_t)np, sizeof *np);
	vp->v_data = np;
	np->n_vnode = vp;
	/*
	 * Insert the nfsnode in the hash queue for its new file handle
	 */
	LIST_INSERT_HEAD(nhpp, np, n_hash);
	if (fhsize > NFS_SMALLFH) {
		MALLOC_ZONE(np->n_fhp, nfsfh_t *,
				fhsize, M_NFSBIGFH, M_WAITOK);
	} else
		np->n_fhp = &np->n_fh;
	bcopy((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize);
	np->n_fhsize = fhsize;
	*npp = np;

	if (nfs_node_hash_lock < 0)
		wakeup(&nfs_node_hash_lock);
	nfs_node_hash_lock = 0;

	/*
	 * Lock the new nfsnode.
	 */
	error =	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);

	return (error);
}

int
nfs_inactive(ap)
	struct vop_inactive_args /* {
		struct vnode *a_vp;
		struct proc *a_p;
	} */ *ap;
{
	register struct nfsnode *np;
	register struct sillyrename *sp;
	struct proc *p = current_proc();	/* XXX */
	extern int prtactive;
	struct ucred *cred;

	np = VTONFS(ap->a_vp);
	if (prtactive && ap->a_vp->v_usecount != 0)
		vprint("nfs_inactive: pushing active", ap->a_vp);
	if (ap->a_vp->v_type != VDIR) {
		sp = np->n_sillyrename;
		np->n_sillyrename = (struct sillyrename *)0;
	} else
		sp = (struct sillyrename *)0;

	if (sp) {
		/*
		 * Remove the silly file that was rename'd earlier
		 */
#if DIAGNOSTIC
		kprintf("nfs_inactive removing %s, dvp=%x, a_vp=%x, ap=%x, np=%x, sp=%x\n", &sp->s_name[0], (unsigned)sp->s_dvp, (unsigned)ap->a_vp, (unsigned)ap, (unsigned)np, (unsigned)sp);
#endif
		/*
		 * We get a reference (vget) to ensure getnewvnode()
		 * doesn't recycle vp while we're asleep awaiting I/O.
		 * Note we don't need the reference unless usecount is
		 * already zero.  In the case of a forcible unmount it
		 * wont be zero and doing a vget would fail because
		 * vclean holds VXLOCK.
		 */
                if (ap->a_vp->v_usecount > 0) {
                        VREF(ap->a_vp);
                } else if (vget(ap->a_vp, 0, ap->a_p))
			panic("nfs_inactive: vget failed");
		(void) nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, p, 1);
		np->n_size = 0;
		ubc_setsize(ap->a_vp, (off_t)0);

                /* We have a problem. The dvp could have gone away on us while
                 * in the unmount path. Thus it appears as VBAD and we cannot
                 * use it. If we tried locking the parent (future), for silly
                 * rename files, it is unclear where we would lock. The unmount
                 * code just pulls unlocked vnodes as it goes thru its list and
                 * yanks them. Could unmount be smarter to see if a busy reg vnode has
                 * a parent, and not yank it yet? Put in more passes at unmount
                 * time? In the meantime, just check if it went away on us.
                 * Could have gone away during the nfs_vinvalbuf or ubc_setsize
                 * which block.  Or perhaps even before nfs_inactive got called.
                 */
                if ((sp->s_dvp)->v_type != VBAD) 
                        nfs_removeit(sp); /* uses the dvp */
		cred = sp->s_cred;
		if (cred != NOCRED) {
			sp->s_cred = NOCRED;
			crfree(cred);
		}
		vrele(sp->s_dvp);
		FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
		vrele(ap->a_vp);
	}
	np->n_flag &= (NMODIFIED | NFLUSHINPROG | NFLUSHWANT | NQNFSEVICTED |
		NQNFSNONCACHE | NQNFSWRITE);
	VOP_UNLOCK(ap->a_vp, 0, ap->a_p);
	return (0);
}

/*
 * Reclaim an nfsnode so that it can be used for other purposes.
 */
int
nfs_reclaim(ap)
	struct vop_reclaim_args /* {
		struct vnode *a_vp;
	} */ *ap;
{
	register struct vnode *vp = ap->a_vp;
	register struct nfsnode *np = VTONFS(vp);
	register struct nfsmount *nmp = VFSTONFS(vp->v_mount);
	register struct nfsdmap *dp, *dp2;
	extern int prtactive;

	if (prtactive && vp->v_usecount != 0)
		vprint("nfs_reclaim: pushing active", vp);

	LIST_REMOVE(np, n_hash);

        /*
         * In case we block during FREE_ZONEs below, get the entry out
         * of tbe name cache now so subsequent lookups won't find it.
         */ 
        cache_purge(vp); 

	/*
	 * For nqnfs, take it off the timer queue as required.
	 */
	if ((nmp->nm_flag & NFSMNT_NQNFS) && np->n_timer.cqe_next != 0) {
		CIRCLEQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
	}

	/*
	 * Free up any directory cookie structures and
	 * large file handle structures that might be associated with
	 * this nfs node.
	 */
	if (vp->v_type == VDIR) {
		dp = np->n_cookies.lh_first;
		while (dp) {
			dp2 = dp;
			dp = dp->ndm_list.le_next;
			FREE_ZONE((caddr_t)dp2,
					sizeof (struct nfsdmap), M_NFSDIROFF);
		}
	}
	if (np->n_fhsize > NFS_SMALLFH) {
		FREE_ZONE((caddr_t)np->n_fhp, np->n_fhsize, M_NFSBIGFH);
	}

	FREE_ZONE(vp->v_data, sizeof (struct nfsnode), M_NFSNODE);
	vp->v_data = (void *)0;
	return (0);
}

/*
 * Lock an nfsnode
 */
int
nfs_lock(ap)
	struct vop_lock_args /* {
                struct vnode *a_vp;
                int a_flags;
                struct proc *a_p;
	} */ *ap;
{
	register struct vnode *vp = ap->a_vp;

	/*
	 * Ugh, another place where interruptible mounts will get hung.
	 * If you make this call interruptible, then you have to fix all
	 * the VOP_LOCK() calls to expect interruptibility.
	 */
	if (vp->v_tag == VT_NON)
		return (ENOENT); /* ??? -- got to check something and error, but what? */
	 
	return(lockmgr(&VTONFS(vp)->n_lock, ap->a_flags, &vp->v_interlock,
                ap->a_p));
	
}

/*
 * Unlock an nfsnode
 */
int
nfs_unlock(ap)
        struct vop_unlock_args /* {
                struct vnode *a_vp;
                int a_flags;
                struct proc *a_p;
        } */ *ap;
{
        struct vnode *vp = ap->a_vp;

        return (lockmgr(&VTONFS(vp)->n_lock, ap->a_flags | LK_RELEASE,
                &vp->v_interlock, ap->a_p));
}

/*
 * Check for a locked nfsnode
 */
int
nfs_islocked(ap)
	struct vop_islocked_args /* {
		struct vnode *a_vp;
	} */ *ap;
{
	return (lockstatus(&VTONFS(ap->a_vp)->n_lock));

}


/*
 * Nfs abort op, called after namei() when a CREATE/DELETE isn't actually
 * done. Currently nothing to do.
 */
/* ARGSUSED */
int
nfs_abortop(ap)
	struct vop_abortop_args /* {
		struct vnode *a_dvp;
		struct componentname *a_cnp;
	} */ *ap;
{

	if ((ap->a_cnp->cn_flags & (HASBUF | SAVESTART)) == HASBUF)
		FREE_ZONE(ap->a_cnp->cn_pnbuf, ap->a_cnp->cn_pnlen, M_NAMEI);
	return (0);
}
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	23	/*
	24	* Copyright (c) 1989, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	*
	27	* This code is derived from software contributed to Berkeley by
	28	* Rick Macklem at The University of Guelph.
	29	*
	30	* Redistribution and use in source and binary forms, with or without
	31	* modification, are permitted provided that the following conditions
	32	* are met:
	33	* 1. Redistributions of source code must retain the above copyright
	34	* notice, this list of conditions and the following disclaimer.
	35	* 2. Redistributions in binary form must reproduce the above copyright
	36	* notice, this list of conditions and the following disclaimer in the
	37	* documentation and/or other materials provided with the distribution.
	38	* 3. All advertising materials mentioning features or use of this software
	39	* must display the following acknowledgement:
	40	* This product includes software developed by the University of
	41	* California, Berkeley and its contributors.
	42	* 4. Neither the name of the University nor the names of its contributors
	43	* may be used to endorse or promote products derived from this software
	44	* without specific prior written permission.
	45	*
	46	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	47	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	48	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	49	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	50	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	51	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	52	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	53	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	54	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	55	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	56	* SUCH DAMAGE.
	57	*
	58	* @(#)nfs_node.c 8.6 (Berkeley) 5/22/95
	59	* FreeBSD-Id: nfs_node.c,v 1.22 1997/10/28 14:06:20 bde Exp $
	60	*/
	61
	62
	63	#include <sys/param.h>
	64	#include <sys/systm.h>
65	#include <sys/proc.h>
66	#include <sys/mount.h>
67	#include <sys/namei.h>
68	#include <sys/vnode.h>
69	#include <sys/malloc.h>
70
71	#include <nfs/rpcv2.h>
72	#include <nfs/nfsproto.h>
73	#include <nfs/nfs.h>
74	#include <nfs/nfsnode.h>
75	#include <nfs/nfsmount.h>
76
77	#ifdef MALLOC_DEFINE
78	static MALLOC_DEFINE(M_NFSNODE, "NFS node", "NFS vnode private part");
79	#endif
80
81	LIST_HEAD(nfsnodehashhead, nfsnode) *nfsnodehashtbl;
82	u_long nfsnodehash;
83
84	#define TRUE 1
85	#define FALSE 0
86
87	/*
88	* Initialize hash links for nfsnodes
89	* and build nfsnode free list.
90	*/
91	void
92	nfs_nhinit()
93	{
94	nfsnodehashtbl = hashinit(desiredvnodes, M_NFSNODE, &nfsnodehash);
95	}
96
97	/*
98	* Compute an entry in the NFS hash table structure
99	*/
100	u_long
101	nfs_hash(fhp, fhsize)
102	register nfsfh_t *fhp;
103	int fhsize;
104	{
105	register u_char *fhpp;
106	register u_long fhsum;
107	register int i;
108
109	fhpp = &fhp->fh_bytes[0];
110	fhsum = 0;
111	for (i = 0; i < fhsize; i++)
112	fhsum += *fhpp++;
113	return (fhsum);
114	}
115
116	/*
117	* Look up a vnode/nfsnode by file handle.
118	* Callers must check for mount points!!
119	* In all cases, a pointer to a
120	* nfsnode structure is returned.
121	*/
122	int nfs_node_hash_lock;
123
124	int
125	nfs_nget(mntp, fhp, fhsize, npp)
126	struct mount *mntp;
127	register nfsfh_t *fhp;
128	int fhsize;
129	struct nfsnode **npp;
130	{
131	struct proc p = current_proc(); / XXX */
132	struct nfsnode *np;
133	struct nfsnodehashhead *nhpp;
134	register struct vnode *vp;
135	struct vnode *nvp;
136	int error;
137
138	/* Check for unmount in progress */
139	if (mntp->mnt_kern_flag & MNTK_UNMOUNT) {
140	*npp = 0;
141	return (EPERM);
142	}
143
144	nhpp = NFSNOHASH(nfs_hash(fhp, fhsize));
145	loop:
146	for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
147	if (mntp != NFSTOV(np)->v_mount \|\| np->n_fhsize != fhsize \|\|
148	bcmp((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize))
149	continue;
150	vp = NFSTOV(np);
151	if (vget(vp, LK_EXCLUSIVE, p))
152	goto loop;
153	*npp = np;
154	return(0);
155	}
156	/*
157	* Obtain a lock to prevent a race condition if the getnewvnode()
158	* or MALLOC() below happens to block.
159	*/
160	if (nfs_node_hash_lock) {
161	while (nfs_node_hash_lock) {
162	nfs_node_hash_lock = -1;
163	tsleep(&nfs_node_hash_lock, PVM, "nfsngt", 0);
164	}
165	goto loop;
166	}
167	nfs_node_hash_lock = 1;
168
169	/*
170	* Do the MALLOC before the getnewvnode since doing so afterward
171	* might cause a bogus v_data pointer to get dereferenced
172	* elsewhere if MALLOC should block.
173	*/
174	MALLOC_ZONE(np, struct nfsnode , sizeof np, M_NFSNODE, M_WAITOK);
175
176	error = getnewvnode(VT_NFS, mntp, nfsv2_vnodeop_p, &nvp);
177	if (error) {
178	if (nfs_node_hash_lock < 0)
179	wakeup(&nfs_node_hash_lock);
180	nfs_node_hash_lock = 0;
181	*npp = 0;
182	FREE_ZONE(np, sizeof *np, M_NFSNODE);
183	return (error);
184	}
185	vp = nvp;
186	bzero((caddr_t)np, sizeof *np);
187	vp->v_data = np;
188	np->n_vnode = vp;
189	/*
190	* Insert the nfsnode in the hash queue for its new file handle
191	*/
192	LIST_INSERT_HEAD(nhpp, np, n_hash);
193	if (fhsize > NFS_SMALLFH) {
194	MALLOC_ZONE(np->n_fhp, nfsfh_t *,
195	fhsize, M_NFSBIGFH, M_WAITOK);
196	} else
197	np->n_fhp = &np->n_fh;
198	bcopy((caddr_t)fhp, (caddr_t)np->n_fhp, fhsize);
199	np->n_fhsize = fhsize;
200	*npp = np;
201
202	if (nfs_node_hash_lock < 0)
203	wakeup(&nfs_node_hash_lock);
204	nfs_node_hash_lock = 0;
205
206	/*
207	* Lock the new nfsnode.
208	*/
fa4905b1	209	error = vn_lock(vp, LK_EXCLUSIVE \| LK_RETRY, p);
1c79356b	210
fa4905b1	211	return (error);
1c79356b A	212	}
	213
	214	int
	215	nfs_inactive(ap)
	216	struct vop_inactive_args /* {
	217	struct vnode *a_vp;
	218	struct proc *a_p;
	219	} / ap;
	220	{
	221	register struct nfsnode *np;
	222	register struct sillyrename *sp;
	223	struct proc p = current_proc(); / XXX */
	224	extern int prtactive;
	225	struct ucred *cred;
	226
	227	np = VTONFS(ap->a_vp);
	228	if (prtactive && ap->a_vp->v_usecount != 0)
	229	vprint("nfs_inactive: pushing active", ap->a_vp);
	230	if (ap->a_vp->v_type != VDIR) {
	231	sp = np->n_sillyrename;
	232	np->n_sillyrename = (struct sillyrename *)0;
	233	} else
	234	sp = (struct sillyrename *)0;
	235
	236	if (sp) {
	237	/*
	238	* Remove the silly file that was rename'd earlier
	239	*/
	240	#if DIAGNOSTIC
	241	kprintf("nfs_inactive removing %s, dvp=%x, a_vp=%x, ap=%x, np=%x, sp=%x\n", &sp->s_name[0], (unsigned)sp->s_dvp, (unsigned)ap->a_vp, (unsigned)ap, (unsigned)np, (unsigned)sp);
	242	#endif
	243	/*
	244	* We get a reference (vget) to ensure getnewvnode()
	245	* doesn't recycle vp while we're asleep awaiting I/O.
	246	* Note we don't need the reference unless usecount is
	247	* already zero. In the case of a forcible unmount it
	248	* wont be zero and doing a vget would fail because
	249	* vclean holds VXLOCK.
	250	*/
	251	if (ap->a_vp->v_usecount > 0) {
	252	VREF(ap->a_vp);
	253	} else if (vget(ap->a_vp, 0, ap->a_p))
	254	panic("nfs_inactive: vget failed");
	255	(void) nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, p, 1);
fa4905b1	256	np->n_size = 0;
1c79356b A	257	ubc_setsize(ap->a_vp, (off_t)0);
1c79356b A	258
fa4905b1 A	259	/* We have a problem. The dvp could have gone away on us while
	260	* in the unmount path. Thus it appears as VBAD and we cannot
	261	* use it. If we tried locking the parent (future), for silly
1c79356b A	262	* rename files, it is unclear where we would lock. The unmount
	263	* code just pulls unlocked vnodes as it goes thru its list and
	264	* yanks them. Could unmount be smarter to see if a busy reg vnode has
	265	* a parent, and not yank it yet? Put in more passes at unmount
fa4905b1 A	266	* time? In the meantime, just check if it went away on us.
	267	* Could have gone away during the nfs_vinvalbuf or ubc_setsize
	268	* which block. Or perhaps even before nfs_inactive got called.
1c79356b A	269	*/
	270	if ((sp->s_dvp)->v_type != VBAD)
	271	nfs_removeit(sp); /* uses the dvp */
	272	cred = sp->s_cred;
	273	if (cred != NOCRED) {
	274	sp->s_cred = NOCRED;
	275	crfree(cred);
	276	}
	277	vrele(sp->s_dvp);
	278	FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
	279	vrele(ap->a_vp);
	280	}
	281	np->n_flag &= (NMODIFIED \| NFLUSHINPROG \| NFLUSHWANT \| NQNFSEVICTED \|
	282	NQNFSNONCACHE \| NQNFSWRITE);
	283	VOP_UNLOCK(ap->a_vp, 0, ap->a_p);
	284	return (0);
	285	}
	286
	287	/*
	288	* Reclaim an nfsnode so that it can be used for other purposes.
	289	*/
	290	int
	291	nfs_reclaim(ap)
	292	struct vop_reclaim_args /* {
	293	struct vnode *a_vp;
	294	} / ap;
	295	{
	296	register struct vnode *vp = ap->a_vp;
	297	register struct nfsnode *np = VTONFS(vp);
	298	register struct nfsmount *nmp = VFSTONFS(vp->v_mount);
	299	register struct nfsdmap dp, dp2;
	300	extern int prtactive;
	301
	302	if (prtactive && vp->v_usecount != 0)
	303	vprint("nfs_reclaim: pushing active", vp);
	304
	305	LIST_REMOVE(np, n_hash);
	306
	307	/*
	308	* In case we block during FREE_ZONEs below, get the entry out
	309	* of tbe name cache now so subsequent lookups won't find it.
	310	*/
	311	cache_purge(vp);
	312
	313	/*
	314	* For nqnfs, take it off the timer queue as required.
	315	*/
	316	if ((nmp->nm_flag & NFSMNT_NQNFS) && np->n_timer.cqe_next != 0) {
	317	CIRCLEQ_REMOVE(&nmp->nm_timerhead, np, n_timer);
	318	}
	319
	320	/*
	321	* Free up any directory cookie structures and
	322	* large file handle structures that might be associated with
	323	* this nfs node.
	324	*/
	325	if (vp->v_type == VDIR) {
	326	dp = np->n_cookies.lh_first;
	327	while (dp) {
	328	dp2 = dp;
	329	dp = dp->ndm_list.le_next;
	330	FREE_ZONE((caddr_t)dp2,
	331	sizeof (struct nfsdmap), M_NFSDIROFF);
	332	}
333	}
334	if (np->n_fhsize > NFS_SMALLFH) {
335	FREE_ZONE((caddr_t)np->n_fhp, np->n_fhsize, M_NFSBIGFH);
336	}
337
338	FREE_ZONE(vp->v_data, sizeof (struct nfsnode), M_NFSNODE);
339	vp->v_data = (void *)0;
340	return (0);
341	}
342
1c79356b A	343	/*
	344	* Lock an nfsnode
	345	*/
	346	int
	347	nfs_lock(ap)
	348	struct vop_lock_args /* {
fa4905b1 A	349	struct vnode *a_vp;
	350	int a_flags;
	351	struct proc *a_p;
1c79356b A	352	} / ap;
	353	{
	354	register struct vnode *vp = ap->a_vp;
	355
	356	/*
	357	* Ugh, another place where interruptible mounts will get hung.
fa4905b1	358	* If you make this call interruptible, then you have to fix all
1c79356b A	359	* the VOP_LOCK() calls to expect interruptibility.
1c79356b A	360	*/
1c79356b	361	if (vp->v_tag == VT_NON)
fa4905b1 A	362	return (ENOENT); /* ??? -- got to check something and error, but what? */
	363
	364	return(lockmgr(&VTONFS(vp)->n_lock, ap->a_flags, &vp->v_interlock,
	365	ap->a_p));
	366
1c79356b A	367	}
	368
	369	/*
	370	* Unlock an nfsnode
	371	*/
	372	int
	373	nfs_unlock(ap)
fa4905b1 A	374	struct vop_unlock_args /* {
	375	struct vnode *a_vp;
	376	int a_flags;
	377	struct proc *a_p;
	378	} / ap;
1c79356b	379	{
fa4905b1	380	struct vnode *vp = ap->a_vp;
1c79356b	381
fa4905b1 A	382	return (lockmgr(&VTONFS(vp)->n_lock, ap->a_flags \| LK_RELEASE,
fa4905b1 A	383	&vp->v_interlock, ap->a_p));
1c79356b A	384	}
	385
	386	/*
	387	* Check for a locked nfsnode
	388	*/
	389	int
	390	nfs_islocked(ap)
	391	struct vop_islocked_args /* {
	392	struct vnode *a_vp;
	393	} / ap;
	394	{
fa4905b1 A	395	return (lockstatus(&VTONFS(ap->a_vp)->n_lock));
fa4905b1 A	396
1c79356b	397	}
fa4905b1	398
1c79356b A	399
	400	/*
	401	* Nfs abort op, called after namei() when a CREATE/DELETE isn't actually
	402	* done. Currently nothing to do.
	403	*/
	404	/* ARGSUSED */
	405	int
	406	nfs_abortop(ap)
	407	struct vop_abortop_args /* {
	408	struct vnode *a_dvp;
	409	struct componentname *a_cnp;
	410	} / ap;
	411	{
	412
	413	if ((ap->a_cnp->cn_flags & (HASBUF \| SAVESTART)) == HASBUF)
	414	FREE_ZONE(ap->a_cnp->cn_pnbuf, ap->a_cnp->cn_pnlen, M_NAMEI);
	415	return (0);
	416	}