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

/*
 * Copyright (c) 2000-2005 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/kauth.h>
#include <sys/mount_internal.h>
#include <sys/vnode.h>
#include <sys/ubc.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>

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

lck_grp_t * nfs_node_hash_lck_grp;
lck_grp_attr_t * nfs_node_hash_lck_grp_attr;
lck_attr_t * nfs_node_hash_lck_attr;
lck_mtx_t *nfs_node_hash_mutex;

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

	nfs_node_hash_lck_grp_attr = lck_grp_attr_alloc_init();
	nfs_node_hash_lck_grp = lck_grp_alloc_init("nfs_node_hash", nfs_node_hash_lck_grp_attr);

	nfs_node_hash_lck_attr = lck_attr_alloc_init();

	nfs_node_hash_mutex = lck_mtx_alloc_init(nfs_node_hash_lck_grp, nfs_node_hash_lck_attr);
}

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

	fhsum = 0;
	for (i = 0; i < fhsize; i++)
		fhsum += *fhp++;
	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_nget(
	mount_t mntp,
	vnode_t dvp,
	struct componentname *cnp,
	u_char *fhp,
	int fhsize,
	struct nfs_vattr *nvap,
	u_int64_t *xidp,
	int flags,
	struct nfsnode **npp)
{
	struct nfsnode *np;
	struct nfsnodehashhead *nhpp;
	vnode_t vp, nvp;
	int error;
	mount_t mp;
	struct vnode_fsparam vfsp;
	uint32_t vid;

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

	nhpp = NFSNOHASH(nfs_hash(fhp, fhsize));
loop:
	lck_mtx_lock(nfs_node_hash_mutex);
	for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
		mp = (np->n_flag & NINIT) ? np->n_mount : vnode_mount(NFSTOV(np));
		if (mntp != mp || np->n_fhsize != fhsize ||
		    bcmp(fhp, np->n_fhp, fhsize))
			continue;
		/* if the node is still being initialized, sleep on it */
		if (np->n_flag & NINIT) {
			np->n_flag |= NWINIT;
			msleep(np, nfs_node_hash_mutex, PDROP | PINOD, "nfs_nget", 0);
			goto loop;
		}
		vp = NFSTOV(np);
		vid = vnode_vid(vp);
		lck_mtx_unlock(nfs_node_hash_mutex);
		if ((error = vnode_getwithvid(vp, vid))) {
			/*
			 * If vnode is being reclaimed or has already
			 * changed identity, no need to wait.
			 */
			return (error);
		} 
		/* update attributes */
		error = nfs_loadattrcache(np, nvap, xidp, 0);
		if (error) {
			vnode_put(vp);
		} else {
			if (dvp && cnp && (flags & NG_MAKEENTRY))
				cache_enter(dvp, vp, cnp);
			*npp = np;
		}
		return(error);
	}

	/*
	 * allocate and initialize nfsnode and stick it in the hash
	 * before calling getnewvnode().  Anyone finding it in the
	 * hash before initialization is complete will wait for it.
	 */
	MALLOC_ZONE(np, struct nfsnode *, sizeof *np, M_NFSNODE, M_WAITOK);
	if (!np) {
		lck_mtx_unlock(nfs_node_hash_mutex);
		*npp = 0;
		return (ENOMEM);
	}
	bzero((caddr_t)np, sizeof *np);
	np->n_flag |= NINIT;
	np->n_mount = mntp;

	/* setup node's file handle */
	if (fhsize > NFS_SMALLFH) {
		MALLOC_ZONE(np->n_fhp, u_char *,
				fhsize, M_NFSBIGFH, M_WAITOK);
		if (!np->n_fhp) {
			lck_mtx_unlock(nfs_node_hash_mutex);
			FREE_ZONE(np, sizeof *np, M_NFSNODE);
			*npp = 0;
			return (ENOMEM);
		}
	} else {
		np->n_fhp = &np->n_fh[0];
	}
	bcopy(fhp, np->n_fhp, fhsize);
	np->n_fhsize = fhsize;

	/* Insert the nfsnode in the hash queue for its new file handle */
	np->n_flag |= NHASHED;
	LIST_INSERT_HEAD(nhpp, np, n_hash);

	/* release lock on hash table */
	lck_mtx_unlock(nfs_node_hash_mutex);

	/* do initial loading of attributes */
	error = nfs_loadattrcache(np, nvap, xidp, 1);
	if (error) {
		lck_mtx_lock(nfs_node_hash_mutex);
		LIST_REMOVE(np, n_hash);
		np->n_flag &= ~(NHASHED|NINIT);
		if (np->n_flag & NWINIT) {
			np->n_flag &= ~NWINIT;
			wakeup((caddr_t)np);
		}
		lck_mtx_unlock(nfs_node_hash_mutex);
		if (np->n_fhsize > NFS_SMALLFH)
			FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
		FREE_ZONE(np, sizeof *np, M_NFSNODE);
		*npp = 0;
		return (error);
	}
	np->n_mtime = nvap->nva_mtime;
	if (nvap->nva_type == VDIR)
		np->n_ncmtime = nvap->nva_mtime;
	NMODEINVALIDATE(np);

	/* now, attempt to get a new vnode */
	vfsp.vnfs_mp = mntp;
	vfsp.vnfs_vtype = nvap->nva_type;
	vfsp.vnfs_str = "nfs";
	vfsp.vnfs_dvp = dvp;
	vfsp.vnfs_fsnode = np;
	if (nvap->nva_type == VFIFO)
		vfsp.vnfs_vops = fifo_nfsv2nodeop_p;
	else if (nvap->nva_type == VBLK || nvap->nva_type == VCHR)
		vfsp.vnfs_vops = spec_nfsv2nodeop_p;
	else
		vfsp.vnfs_vops = nfsv2_vnodeop_p;
	vfsp.vnfs_markroot = (flags & NG_MARKROOT) ? 1 : 0;
	vfsp.vnfs_marksystem = 0;
	vfsp.vnfs_rdev = 0;
	vfsp.vnfs_filesize = nvap->nva_size;
	vfsp.vnfs_cnp = cnp;
	if (dvp && cnp && (flags & NG_MAKEENTRY))
		vfsp.vnfs_flags = 0;
	else
		vfsp.vnfs_flags = VNFS_NOCACHE;
	error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &nvp);
	if (error) {
		lck_mtx_lock(nfs_node_hash_mutex);
		LIST_REMOVE(np, n_hash);
		np->n_flag &= ~(NHASHED|NINIT);
		if (np->n_flag & NWINIT) {
			np->n_flag &= ~NWINIT;
			wakeup((caddr_t)np);
		}
		lck_mtx_unlock(nfs_node_hash_mutex);
		if (np->n_fhsize > NFS_SMALLFH)
			FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
		FREE_ZONE(np, sizeof *np, M_NFSNODE);
		*npp = 0;
		return (error);
	}
	vp = nvp;
	np->n_vnode = vp;
	vnode_addfsref(vp);
	vnode_settag(vp, VT_NFS); // XXX shouldn't this be a vnode_create() parameter?
	*npp = np;
	/* node is now initialized */

	/* check if anyone's waiting on this node */
	lck_mtx_lock(nfs_node_hash_mutex);
	np->n_flag &= ~NINIT;
	if (np->n_flag & NWINIT) {
		np->n_flag &= ~NWINIT;
		wakeup((caddr_t)np);
	}
	lck_mtx_unlock(nfs_node_hash_mutex);

	return (error);
}


int
nfs_inactive(ap)
	struct vnop_inactive_args /* {
		struct vnodeop_desc *a_desc;
		vnode_t a_vp;
		vfs_context_t a_context;
	} */ *ap;
{
	register struct nfsnode *np;
	register struct sillyrename *sp;

	np = VTONFS(ap->a_vp);
	if (vnode_vtype(ap->a_vp) != 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
		nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, vfs_context_proc(ap->a_context), 1);
		np->n_size = 0;
		ubc_setsize(ap->a_vp, (off_t)0);
		nfs_removeit(sp);
		/*
		 * remove nfsnode from hash now so we can't accidentally find it
		 * again if another object gets created with the same filehandle
		 * before this vnode gets reclaimed
		 */
		lck_mtx_lock(nfs_node_hash_mutex);
		LIST_REMOVE(np, n_hash);
		np->n_flag &= ~NHASHED;
		lck_mtx_unlock(nfs_node_hash_mutex);
		if (IS_VALID_CRED(sp->s_cred)) {
			kauth_cred_unref(&sp->s_cred);
		}
		vnode_rele(sp->s_dvp);
		FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
		vnode_recycle(ap->a_vp);
	}
	/* clear all flags other than these */
	np->n_flag &= (NMODIFIED | NFLUSHINPROG | NFLUSHWANT | NHASHED);
	return (0);
}

/*
 * Reclaim an nfsnode so that it can be used for other purposes.
 */
int
nfs_reclaim(ap)
	struct vnop_reclaim_args /* {
		struct vnodeop_desc *a_desc;
		vnode_t a_vp;
		vfs_context_t a_context;
	} */ *ap;
{
	vnode_t vp = ap->a_vp;
	struct nfsnode *np = VTONFS(vp);
	struct nfsdmap *dp, *dp2;

	vnode_removefsref(vp);

	if (np->n_flag & NHASHED) {
		lck_mtx_lock(nfs_node_hash_mutex);
		LIST_REMOVE(np, n_hash);
		np->n_flag &= ~NHASHED;
		lck_mtx_unlock(nfs_node_hash_mutex);
	}

	/*
	 * Free up any directory cookie structures and
	 * large file handle structures that might be associated with
	 * this nfs node.
	 */
	if (vnode_vtype(vp) == 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(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
	}
	vnode_clearfsnode(vp);

	FREE_ZONE(np, sizeof(struct nfsnode), M_NFSNODE);
	return (0);
}
Commit	Line	Data
1c79356b	1	/*
5d5c5d0d A	2	* Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
5d5c5d0d A	3	*
6601e61a	4	* @APPLE_LICENSE_HEADER_START@
1c79356b	5	*
6601e61a A	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.
8f6c56a5	11	*
6601e61a A	12	* This Original Code and all software distributed under the License are
6601e61a A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
6601e61a A	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.
8f6c56a5	19	*
6601e61a	20	* @APPLE_LICENSE_HEADER_END@
1c79356b A	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>
91447636 A	66	#include <sys/kauth.h>
91447636 A	67	#include <sys/mount_internal.h>
1c79356b	68	#include <sys/vnode.h>
91447636	69	#include <sys/ubc.h>
1c79356b A	70	#include <sys/malloc.h>
	71
	72	#include <nfs/rpcv2.h>
	73	#include <nfs/nfsproto.h>
	74	#include <nfs/nfs.h>
	75	#include <nfs/nfsnode.h>
	76	#include <nfs/nfsmount.h>
	77
1c79356b A	78	LIST_HEAD(nfsnodehashhead, nfsnode) *nfsnodehashtbl;
	79	u_long nfsnodehash;
	80
91447636 A	81	lck_grp_t * nfs_node_hash_lck_grp;
	82	lck_grp_attr_t * nfs_node_hash_lck_grp_attr;
	83	lck_attr_t * nfs_node_hash_lck_attr;
	84	lck_mtx_t *nfs_node_hash_mutex;
1c79356b A	85
	86	/*
	87	* Initialize hash links for nfsnodes
	88	* and build nfsnode free list.
	89	*/
	90	void
e5568f75	91	nfs_nhinit(void)
1c79356b A	92	{
1c79356b A	93	nfsnodehashtbl = hashinit(desiredvnodes, M_NFSNODE, &nfsnodehash);
91447636 A	94
91447636 A	95	nfs_node_hash_lck_grp_attr = lck_grp_attr_alloc_init();
91447636 A	96	nfs_node_hash_lck_grp = lck_grp_alloc_init("nfs_node_hash", nfs_node_hash_lck_grp_attr);
	97
	98	nfs_node_hash_lck_attr = lck_attr_alloc_init();
	99
	100	nfs_node_hash_mutex = lck_mtx_alloc_init(nfs_node_hash_lck_grp, nfs_node_hash_lck_attr);
1c79356b A	101	}
	102
	103	/*
	104	* Compute an entry in the NFS hash table structure
	105	*/
	106	u_long
91447636	107	nfs_hash(u_char *fhp, int fhsize)
1c79356b	108	{
91447636 A	109	u_long fhsum;
91447636 A	110	int i;
1c79356b	111
1c79356b A	112	fhsum = 0;
1c79356b A	113	for (i = 0; i < fhsize; i++)
91447636	114	fhsum += *fhp++;
1c79356b A	115	return (fhsum);
	116	}
	117
	118	/*
	119	* Look up a vnode/nfsnode by file handle.
	120	* Callers must check for mount points!!
	121	* In all cases, a pointer to a
	122	* nfsnode structure is returned.
	123	*/
1c79356b	124	int
91447636 A	125	nfs_nget(
	126	mount_t mntp,
	127	vnode_t dvp,
	128	struct componentname *cnp,
	129	u_char *fhp,
	130	int fhsize,
	131	struct nfs_vattr *nvap,
	132	u_int64_t *xidp,
	133	int flags,
	134	struct nfsnode **npp)
1c79356b	135	{
1c79356b A	136	struct nfsnode *np;
1c79356b A	137	struct nfsnodehashhead *nhpp;
91447636	138	vnode_t vp, nvp;
1c79356b	139	int error;
91447636 A	140	mount_t mp;
	141	struct vnode_fsparam vfsp;
	142	uint32_t vid;
1c79356b A	143
1c79356b A	144	/* Check for unmount in progress */
55e303ae	145	if (!mntp \|\| (mntp->mnt_kern_flag & MNTK_UNMOUNT)) {
1c79356b	146	*npp = 0;
55e303ae	147	return (!mntp ? ENXIO : EPERM);
1c79356b A	148	}
	149
	150	nhpp = NFSNOHASH(nfs_hash(fhp, fhsize));
	151	loop:
91447636	152	lck_mtx_lock(nfs_node_hash_mutex);
1c79356b	153	for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
91447636	154	mp = (np->n_flag & NINIT) ? np->n_mount : vnode_mount(NFSTOV(np));
55e303ae	155	if (mntp != mp \|\| np->n_fhsize != fhsize \|\|
91447636	156	bcmp(fhp, np->n_fhp, fhsize))
1c79356b	157	continue;
55e303ae A	158	/* if the node is still being initialized, sleep on it */
	159	if (np->n_flag & NINIT) {
	160	np->n_flag \|= NWINIT;
91447636	161	msleep(np, nfs_node_hash_mutex, PDROP \| PINOD, "nfs_nget", 0);
55e303ae A	162	goto loop;
55e303ae A	163	}
1c79356b	164	vp = NFSTOV(np);
91447636 A	165	vid = vnode_vid(vp);
	166	lck_mtx_unlock(nfs_node_hash_mutex);
	167	if ((error = vnode_getwithvid(vp, vid))) {
	168	/*
	169	* If vnode is being reclaimed or has already
	170	* changed identity, no need to wait.
	171	*/
	172	return (error);
	173	}
	174	/* update attributes */
	175	error = nfs_loadattrcache(np, nvap, xidp, 0);
	176	if (error) {
	177	vnode_put(vp);
	178	} else {
	179	if (dvp && cnp && (flags & NG_MAKEENTRY))
	180	cache_enter(dvp, vp, cnp);
	181	*npp = np;
1c79356b	182	}
91447636	183	return(error);
1c79356b	184	}
1c79356b A	185
1c79356b A	186	/*
55e303ae A	187	* allocate and initialize nfsnode and stick it in the hash
	188	* before calling getnewvnode(). Anyone finding it in the
	189	* hash before initialization is complete will wait for it.
1c79356b A	190	*/
1c79356b A	191	MALLOC_ZONE(np, struct nfsnode , sizeof np, M_NFSNODE, M_WAITOK);
91447636 A	192	if (!np) {
	193	lck_mtx_unlock(nfs_node_hash_mutex);
	194	*npp = 0;
	195	return (ENOMEM);
	196	}
1c79356b	197	bzero((caddr_t)np, sizeof *np);
55e303ae A	198	np->n_flag \|= NINIT;
55e303ae A	199	np->n_mount = mntp;
55e303ae	200
91447636	201	/* setup node's file handle */
1c79356b	202	if (fhsize > NFS_SMALLFH) {
91447636	203	MALLOC_ZONE(np->n_fhp, u_char *,
1c79356b	204	fhsize, M_NFSBIGFH, M_WAITOK);
91447636 A	205	if (!np->n_fhp) {
	206	lck_mtx_unlock(nfs_node_hash_mutex);
	207	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	208	*npp = 0;
	209	return (ENOMEM);
	210	}
	211	} else {
	212	np->n_fhp = &np->n_fh[0];
	213	}
	214	bcopy(fhp, np->n_fhp, fhsize);
1c79356b	215	np->n_fhsize = fhsize;
91447636 A	216
91447636 A	217	/* Insert the nfsnode in the hash queue for its new file handle */
55e303ae	218	np->n_flag \|= NHASHED;
91447636	219	LIST_INSERT_HEAD(nhpp, np, n_hash);
1c79356b	220
55e303ae	221	/* release lock on hash table */
91447636 A	222	lck_mtx_unlock(nfs_node_hash_mutex);
	223
	224	/* do initial loading of attributes */
	225	error = nfs_loadattrcache(np, nvap, xidp, 1);
	226	if (error) {
	227	lck_mtx_lock(nfs_node_hash_mutex);
	228	LIST_REMOVE(np, n_hash);
	229	np->n_flag &= ~(NHASHED\|NINIT);
	230	if (np->n_flag & NWINIT) {
	231	np->n_flag &= ~NWINIT;
	232	wakeup((caddr_t)np);
	233	}
	234	lck_mtx_unlock(nfs_node_hash_mutex);
	235	if (np->n_fhsize > NFS_SMALLFH)
	236	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
	237	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	238	*npp = 0;
	239	return (error);
	240	}
	241	np->n_mtime = nvap->nva_mtime;
	242	if (nvap->nva_type == VDIR)
	243	np->n_ncmtime = nvap->nva_mtime;
	244	NMODEINVALIDATE(np);
1c79356b	245
55e303ae	246	/* now, attempt to get a new vnode */
91447636 A	247	vfsp.vnfs_mp = mntp;
	248	vfsp.vnfs_vtype = nvap->nva_type;
	249	vfsp.vnfs_str = "nfs";
	250	vfsp.vnfs_dvp = dvp;
	251	vfsp.vnfs_fsnode = np;
	252	if (nvap->nva_type == VFIFO)
	253	vfsp.vnfs_vops = fifo_nfsv2nodeop_p;
	254	else if (nvap->nva_type == VBLK \|\| nvap->nva_type == VCHR)
	255	vfsp.vnfs_vops = spec_nfsv2nodeop_p;
	256	else
	257	vfsp.vnfs_vops = nfsv2_vnodeop_p;
	258	vfsp.vnfs_markroot = (flags & NG_MARKROOT) ? 1 : 0;
	259	vfsp.vnfs_marksystem = 0;
	260	vfsp.vnfs_rdev = 0;
	261	vfsp.vnfs_filesize = nvap->nva_size;
	262	vfsp.vnfs_cnp = cnp;
	263	if (dvp && cnp && (flags & NG_MAKEENTRY))
	264	vfsp.vnfs_flags = 0;
	265	else
	266	vfsp.vnfs_flags = VNFS_NOCACHE;
	267	error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &nvp);
55e303ae	268	if (error) {
91447636	269	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae	270	LIST_REMOVE(np, n_hash);
91447636 A	271	np->n_flag &= ~(NHASHED\|NINIT);
	272	if (np->n_flag & NWINIT) {
	273	np->n_flag &= ~NWINIT;
	274	wakeup((caddr_t)np);
	275	}
	276	lck_mtx_unlock(nfs_node_hash_mutex);
55e303ae	277	if (np->n_fhsize > NFS_SMALLFH)
91447636	278	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
55e303ae A	279	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	280	*npp = 0;
	281	return (error);
	282	}
	283	vp = nvp;
55e303ae	284	np->n_vnode = vp;
91447636 A	285	vnode_addfsref(vp);
91447636 A	286	vnode_settag(vp, VT_NFS); // XXX shouldn't this be a vnode_create() parameter?
55e303ae	287	*npp = np;
91447636	288	/* node is now initialized */
55e303ae	289
91447636 A	290	/* check if anyone's waiting on this node */
91447636 A	291	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	292	np->n_flag &= ~NINIT;
	293	if (np->n_flag & NWINIT) {
	294	np->n_flag &= ~NWINIT;
	295	wakeup((caddr_t)np);
	296	}
91447636	297	lck_mtx_unlock(nfs_node_hash_mutex);
1c79356b	298
fa4905b1	299	return (error);
1c79356b A	300	}
1c79356b A	301
91447636	302
1c79356b A	303	int
1c79356b A	304	nfs_inactive(ap)
91447636 A	305	struct vnop_inactive_args /* {
	306	struct vnodeop_desc *a_desc;
	307	vnode_t a_vp;
	308	vfs_context_t a_context;
1c79356b A	309	} / ap;
	310	{
	311	register struct nfsnode *np;
	312	register struct sillyrename *sp;
1c79356b A	313
1c79356b A	314	np = VTONFS(ap->a_vp);
91447636	315	if (vnode_vtype(ap->a_vp) != VDIR) {
1c79356b A	316	sp = np->n_sillyrename;
	317	np->n_sillyrename = (struct sillyrename *)0;
	318	} else
	319	sp = (struct sillyrename *)0;
	320
	321	if (sp) {
	322	/*
	323	* Remove the silly file that was rename'd earlier
	324	*/
	325	#if DIAGNOSTIC
91447636 A	326	kprintf("nfs_inactive removing %s, dvp=%x, a_vp=%x, ap=%x, np=%x, sp=%x\n",
	327	&sp->s_name[0], (unsigned)sp->s_dvp, (unsigned)ap->a_vp, (unsigned)ap,
	328	(unsigned)np, (unsigned)sp);
1c79356b	329	#endif
91447636	330	nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, vfs_context_proc(ap->a_context), 1);
fa4905b1	331	np->n_size = 0;
1c79356b	332	ubc_setsize(ap->a_vp, (off_t)0);
55e303ae A	333	nfs_removeit(sp);
	334	/*
	335	* remove nfsnode from hash now so we can't accidentally find it
	336	* again if another object gets created with the same filehandle
	337	* before this vnode gets reclaimed
	338	*/
91447636	339	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	340	LIST_REMOVE(np, n_hash);
55e303ae A	341	np->n_flag &= ~NHASHED;
91447636	342	lck_mtx_unlock(nfs_node_hash_mutex);
0c530ab8 A	343	if (IS_VALID_CRED(sp->s_cred)) {
0c530ab8 A	344	kauth_cred_unref(&sp->s_cred);
1c79356b	345	}
91447636	346	vnode_rele(sp->s_dvp);
1c79356b	347	FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
91447636	348	vnode_recycle(ap->a_vp);
1c79356b	349	}
91447636 A	350	/* clear all flags other than these */
91447636 A	351	np->n_flag &= (NMODIFIED \| NFLUSHINPROG \| NFLUSHWANT \| NHASHED);
1c79356b A	352	return (0);
	353	}
	354
	355	/*
	356	* Reclaim an nfsnode so that it can be used for other purposes.
	357	*/
	358	int
	359	nfs_reclaim(ap)
91447636 A	360	struct vnop_reclaim_args /* {
	361	struct vnodeop_desc *a_desc;
	362	vnode_t a_vp;
	363	vfs_context_t a_context;
1c79356b A	364	} / ap;
1c79356b A	365	{
91447636 A	366	vnode_t vp = ap->a_vp;
	367	struct nfsnode *np = VTONFS(vp);
	368	struct nfsdmap dp, dp2;
1c79356b	369
91447636	370	vnode_removefsref(vp);
1c79356b	371
55e303ae	372	if (np->n_flag & NHASHED) {
91447636	373	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	374	LIST_REMOVE(np, n_hash);
55e303ae A	375	np->n_flag &= ~NHASHED;
91447636	376	lck_mtx_unlock(nfs_node_hash_mutex);
1c79356b A	377	}
	378
	379	/*
	380	* Free up any directory cookie structures and
	381	* large file handle structures that might be associated with
	382	* this nfs node.
	383	*/
91447636	384	if (vnode_vtype(vp) == VDIR) {
1c79356b A	385	dp = np->n_cookies.lh_first;
	386	while (dp) {
	387	dp2 = dp;
	388	dp = dp->ndm_list.le_next;
	389	FREE_ZONE((caddr_t)dp2,
	390	sizeof (struct nfsdmap), M_NFSDIROFF);
	391	}
	392	}
	393	if (np->n_fhsize > NFS_SMALLFH) {
91447636	394	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
1c79356b	395	}
91447636	396	vnode_clearfsnode(vp);
1c79356b	397
91447636	398	FREE_ZONE(np, sizeof(struct nfsnode), M_NFSNODE);
1c79356b A	399	return (0);
	400	}
	401