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

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_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();
	lck_grp_attr_setstat(nfs_node_hash_lck_grp_attr);
	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;
	kauth_cred_t cred;

	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);
		cred = sp->s_cred;
		if (cred != NOCRED) {
			sp->s_cred = NOCRED;
			kauth_cred_rele(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	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	29	/*
	30	* Copyright (c) 1989, 1993
	31	* The Regents of the University of California. All rights reserved.
	32	*
	33	* This code is derived from software contributed to Berkeley by
	34	* Rick Macklem at The University of Guelph.
	35	*
	36	* Redistribution and use in source and binary forms, with or without
	37	* modification, are permitted provided that the following conditions
	38	* are met:
	39	* 1. Redistributions of source code must retain the above copyright
	40	* notice, this list of conditions and the following disclaimer.
	41	* 2. Redistributions in binary form must reproduce the above copyright
	42	* notice, this list of conditions and the following disclaimer in the
	43	* documentation and/or other materials provided with the distribution.
	44	* 3. All advertising materials mentioning features or use of this software
	45	* must display the following acknowledgement:
	46	* This product includes software developed by the University of
	47	* California, Berkeley and its contributors.
	48	* 4. Neither the name of the University nor the names of its contributors
	49	* may be used to endorse or promote products derived from this software
	50	* without specific prior written permission.
	51	*
	52	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	53	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	54	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	55	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	56	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	57	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	58	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	59	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	60	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	61	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	62	* SUCH DAMAGE.
	63	*
	64	* @(#)nfs_node.c 8.6 (Berkeley) 5/22/95
	65	* FreeBSD-Id: nfs_node.c,v 1.22 1997/10/28 14:06:20 bde Exp $
	66	*/
	67
	68
	69	#include <sys/param.h>
	70	#include <sys/systm.h>
	71	#include <sys/proc.h>
91447636 A	72	#include <sys/kauth.h>
91447636 A	73	#include <sys/mount_internal.h>
1c79356b	74	#include <sys/vnode.h>
91447636	75	#include <sys/ubc.h>
1c79356b A	76	#include <sys/malloc.h>
	77
	78	#include <nfs/rpcv2.h>
	79	#include <nfs/nfsproto.h>
	80	#include <nfs/nfs.h>
	81	#include <nfs/nfsnode.h>
	82	#include <nfs/nfsmount.h>
	83
1c79356b A	84	LIST_HEAD(nfsnodehashhead, nfsnode) *nfsnodehashtbl;
	85	u_long nfsnodehash;
	86
91447636 A	87	lck_grp_t * nfs_node_hash_lck_grp;
	88	lck_grp_attr_t * nfs_node_hash_lck_grp_attr;
	89	lck_attr_t * nfs_node_hash_lck_attr;
	90	lck_mtx_t *nfs_node_hash_mutex;
1c79356b A	91
	92	/*
	93	* Initialize hash links for nfsnodes
	94	* and build nfsnode free list.
	95	*/
	96	void
e5568f75	97	nfs_nhinit(void)
1c79356b A	98	{
1c79356b A	99	nfsnodehashtbl = hashinit(desiredvnodes, M_NFSNODE, &nfsnodehash);
91447636 A	100
91447636 A	101	nfs_node_hash_lck_grp_attr = lck_grp_attr_alloc_init();
8f6c56a5	102	lck_grp_attr_setstat(nfs_node_hash_lck_grp_attr);
91447636 A	103	nfs_node_hash_lck_grp = lck_grp_alloc_init("nfs_node_hash", nfs_node_hash_lck_grp_attr);
	104
	105	nfs_node_hash_lck_attr = lck_attr_alloc_init();
	106
	107	nfs_node_hash_mutex = lck_mtx_alloc_init(nfs_node_hash_lck_grp, nfs_node_hash_lck_attr);
1c79356b A	108	}
	109
	110	/*
	111	* Compute an entry in the NFS hash table structure
	112	*/
	113	u_long
91447636	114	nfs_hash(u_char *fhp, int fhsize)
1c79356b	115	{
91447636 A	116	u_long fhsum;
91447636 A	117	int i;
1c79356b	118
1c79356b A	119	fhsum = 0;
1c79356b A	120	for (i = 0; i < fhsize; i++)
91447636	121	fhsum += *fhp++;
1c79356b A	122	return (fhsum);
	123	}
	124
	125	/*
	126	* Look up a vnode/nfsnode by file handle.
	127	* Callers must check for mount points!!
	128	* In all cases, a pointer to a
	129	* nfsnode structure is returned.
	130	*/
1c79356b	131	int
91447636 A	132	nfs_nget(
	133	mount_t mntp,
	134	vnode_t dvp,
	135	struct componentname *cnp,
	136	u_char *fhp,
	137	int fhsize,
	138	struct nfs_vattr *nvap,
	139	u_int64_t *xidp,
	140	int flags,
	141	struct nfsnode **npp)
1c79356b	142	{
1c79356b A	143	struct nfsnode *np;
1c79356b A	144	struct nfsnodehashhead *nhpp;
91447636	145	vnode_t vp, nvp;
1c79356b	146	int error;
91447636 A	147	mount_t mp;
	148	struct vnode_fsparam vfsp;
	149	uint32_t vid;
1c79356b A	150
1c79356b A	151	/* Check for unmount in progress */
55e303ae	152	if (!mntp \|\| (mntp->mnt_kern_flag & MNTK_UNMOUNT)) {
1c79356b	153	*npp = 0;
55e303ae	154	return (!mntp ? ENXIO : EPERM);
1c79356b A	155	}
	156
	157	nhpp = NFSNOHASH(nfs_hash(fhp, fhsize));
	158	loop:
91447636	159	lck_mtx_lock(nfs_node_hash_mutex);
1c79356b	160	for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
91447636	161	mp = (np->n_flag & NINIT) ? np->n_mount : vnode_mount(NFSTOV(np));
55e303ae	162	if (mntp != mp \|\| np->n_fhsize != fhsize \|\|
91447636	163	bcmp(fhp, np->n_fhp, fhsize))
1c79356b	164	continue;
55e303ae A	165	/* if the node is still being initialized, sleep on it */
	166	if (np->n_flag & NINIT) {
	167	np->n_flag \|= NWINIT;
91447636	168	msleep(np, nfs_node_hash_mutex, PDROP \| PINOD, "nfs_nget", 0);
55e303ae A	169	goto loop;
55e303ae A	170	}
1c79356b	171	vp = NFSTOV(np);
91447636 A	172	vid = vnode_vid(vp);
	173	lck_mtx_unlock(nfs_node_hash_mutex);
	174	if ((error = vnode_getwithvid(vp, vid))) {
	175	/*
	176	* If vnode is being reclaimed or has already
	177	* changed identity, no need to wait.
	178	*/
	179	return (error);
	180	}
	181	/* update attributes */
	182	error = nfs_loadattrcache(np, nvap, xidp, 0);
	183	if (error) {
	184	vnode_put(vp);
	185	} else {
	186	if (dvp && cnp && (flags & NG_MAKEENTRY))
	187	cache_enter(dvp, vp, cnp);
	188	*npp = np;
1c79356b	189	}
91447636	190	return(error);
1c79356b	191	}
1c79356b A	192
1c79356b A	193	/*
55e303ae A	194	* allocate and initialize nfsnode and stick it in the hash
	195	* before calling getnewvnode(). Anyone finding it in the
	196	* hash before initialization is complete will wait for it.
1c79356b A	197	*/
1c79356b A	198	MALLOC_ZONE(np, struct nfsnode , sizeof np, M_NFSNODE, M_WAITOK);
91447636 A	199	if (!np) {
	200	lck_mtx_unlock(nfs_node_hash_mutex);
	201	*npp = 0;
	202	return (ENOMEM);
	203	}
1c79356b	204	bzero((caddr_t)np, sizeof *np);
55e303ae A	205	np->n_flag \|= NINIT;
55e303ae A	206	np->n_mount = mntp;
55e303ae	207
91447636	208	/* setup node's file handle */
1c79356b	209	if (fhsize > NFS_SMALLFH) {
91447636	210	MALLOC_ZONE(np->n_fhp, u_char *,
1c79356b	211	fhsize, M_NFSBIGFH, M_WAITOK);
91447636 A	212	if (!np->n_fhp) {
	213	lck_mtx_unlock(nfs_node_hash_mutex);
	214	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	215	*npp = 0;
	216	return (ENOMEM);
	217	}
	218	} else {
	219	np->n_fhp = &np->n_fh[0];
	220	}
	221	bcopy(fhp, np->n_fhp, fhsize);
1c79356b	222	np->n_fhsize = fhsize;
91447636 A	223
91447636 A	224	/* Insert the nfsnode in the hash queue for its new file handle */
55e303ae	225	np->n_flag \|= NHASHED;
91447636	226	LIST_INSERT_HEAD(nhpp, np, n_hash);
1c79356b	227
55e303ae	228	/* release lock on hash table */
91447636 A	229	lck_mtx_unlock(nfs_node_hash_mutex);
	230
	231	/* do initial loading of attributes */
	232	error = nfs_loadattrcache(np, nvap, xidp, 1);
	233	if (error) {
	234	lck_mtx_lock(nfs_node_hash_mutex);
	235	LIST_REMOVE(np, n_hash);
	236	np->n_flag &= ~(NHASHED\|NINIT);
	237	if (np->n_flag & NWINIT) {
	238	np->n_flag &= ~NWINIT;
	239	wakeup((caddr_t)np);
	240	}
	241	lck_mtx_unlock(nfs_node_hash_mutex);
	242	if (np->n_fhsize > NFS_SMALLFH)
	243	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
	244	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	245	*npp = 0;
	246	return (error);
	247	}
	248	np->n_mtime = nvap->nva_mtime;
	249	if (nvap->nva_type == VDIR)
	250	np->n_ncmtime = nvap->nva_mtime;
	251	NMODEINVALIDATE(np);
1c79356b	252
55e303ae	253	/* now, attempt to get a new vnode */
91447636 A	254	vfsp.vnfs_mp = mntp;
	255	vfsp.vnfs_vtype = nvap->nva_type;
	256	vfsp.vnfs_str = "nfs";
	257	vfsp.vnfs_dvp = dvp;
	258	vfsp.vnfs_fsnode = np;
	259	if (nvap->nva_type == VFIFO)
	260	vfsp.vnfs_vops = fifo_nfsv2nodeop_p;
	261	else if (nvap->nva_type == VBLK \|\| nvap->nva_type == VCHR)
	262	vfsp.vnfs_vops = spec_nfsv2nodeop_p;
	263	else
	264	vfsp.vnfs_vops = nfsv2_vnodeop_p;
	265	vfsp.vnfs_markroot = (flags & NG_MARKROOT) ? 1 : 0;
	266	vfsp.vnfs_marksystem = 0;
	267	vfsp.vnfs_rdev = 0;
	268	vfsp.vnfs_filesize = nvap->nva_size;
	269	vfsp.vnfs_cnp = cnp;
	270	if (dvp && cnp && (flags & NG_MAKEENTRY))
	271	vfsp.vnfs_flags = 0;
	272	else
	273	vfsp.vnfs_flags = VNFS_NOCACHE;
	274	error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &nvp);
55e303ae	275	if (error) {
91447636	276	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae	277	LIST_REMOVE(np, n_hash);
91447636 A	278	np->n_flag &= ~(NHASHED\|NINIT);
	279	if (np->n_flag & NWINIT) {
	280	np->n_flag &= ~NWINIT;
	281	wakeup((caddr_t)np);
	282	}
	283	lck_mtx_unlock(nfs_node_hash_mutex);
55e303ae	284	if (np->n_fhsize > NFS_SMALLFH)
91447636	285	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
55e303ae A	286	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	287	*npp = 0;
	288	return (error);
	289	}
	290	vp = nvp;
55e303ae	291	np->n_vnode = vp;
91447636 A	292	vnode_addfsref(vp);
91447636 A	293	vnode_settag(vp, VT_NFS); // XXX shouldn't this be a vnode_create() parameter?
55e303ae	294	*npp = np;
91447636	295	/* node is now initialized */
55e303ae	296
91447636 A	297	/* check if anyone's waiting on this node */
91447636 A	298	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	299	np->n_flag &= ~NINIT;
	300	if (np->n_flag & NWINIT) {
	301	np->n_flag &= ~NWINIT;
	302	wakeup((caddr_t)np);
	303	}
91447636	304	lck_mtx_unlock(nfs_node_hash_mutex);
1c79356b	305
fa4905b1	306	return (error);
1c79356b A	307	}
1c79356b A	308
91447636	309
1c79356b A	310	int
1c79356b A	311	nfs_inactive(ap)
91447636 A	312	struct vnop_inactive_args /* {
	313	struct vnodeop_desc *a_desc;
	314	vnode_t a_vp;
	315	vfs_context_t a_context;
1c79356b A	316	} / ap;
	317	{
	318	register struct nfsnode *np;
	319	register struct sillyrename *sp;
91447636	320	kauth_cred_t cred;
1c79356b A	321
1c79356b A	322	np = VTONFS(ap->a_vp);
91447636	323	if (vnode_vtype(ap->a_vp) != VDIR) {
1c79356b A	324	sp = np->n_sillyrename;
	325	np->n_sillyrename = (struct sillyrename *)0;
	326	} else
	327	sp = (struct sillyrename *)0;
	328
	329	if (sp) {
	330	/*
	331	* Remove the silly file that was rename'd earlier
	332	*/
	333	#if DIAGNOSTIC
91447636 A	334	kprintf("nfs_inactive removing %s, dvp=%x, a_vp=%x, ap=%x, np=%x, sp=%x\n",
	335	&sp->s_name[0], (unsigned)sp->s_dvp, (unsigned)ap->a_vp, (unsigned)ap,
	336	(unsigned)np, (unsigned)sp);
1c79356b	337	#endif
91447636	338	nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, vfs_context_proc(ap->a_context), 1);
fa4905b1	339	np->n_size = 0;
1c79356b	340	ubc_setsize(ap->a_vp, (off_t)0);
55e303ae A	341	nfs_removeit(sp);
	342	/*
	343	* remove nfsnode from hash now so we can't accidentally find it
	344	* again if another object gets created with the same filehandle
	345	* before this vnode gets reclaimed
	346	*/
91447636	347	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	348	LIST_REMOVE(np, n_hash);
55e303ae A	349	np->n_flag &= ~NHASHED;
91447636	350	lck_mtx_unlock(nfs_node_hash_mutex);
1c79356b A	351	cred = sp->s_cred;
	352	if (cred != NOCRED) {
	353	sp->s_cred = NOCRED;
91447636	354	kauth_cred_rele(cred);
1c79356b	355	}
91447636	356	vnode_rele(sp->s_dvp);
1c79356b	357	FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
91447636	358	vnode_recycle(ap->a_vp);
1c79356b	359	}
91447636 A	360	/* clear all flags other than these */
91447636 A	361	np->n_flag &= (NMODIFIED \| NFLUSHINPROG \| NFLUSHWANT \| NHASHED);
1c79356b A	362	return (0);
	363	}
	364
	365	/*
	366	* Reclaim an nfsnode so that it can be used for other purposes.
	367	*/
	368	int
	369	nfs_reclaim(ap)
91447636 A	370	struct vnop_reclaim_args /* {
	371	struct vnodeop_desc *a_desc;
	372	vnode_t a_vp;
	373	vfs_context_t a_context;
1c79356b A	374	} / ap;
1c79356b A	375	{
91447636 A	376	vnode_t vp = ap->a_vp;
	377	struct nfsnode *np = VTONFS(vp);
	378	struct nfsdmap dp, dp2;
1c79356b	379
91447636	380	vnode_removefsref(vp);
1c79356b	381
55e303ae	382	if (np->n_flag & NHASHED) {
91447636	383	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	384	LIST_REMOVE(np, n_hash);
55e303ae A	385	np->n_flag &= ~NHASHED;
91447636	386	lck_mtx_unlock(nfs_node_hash_mutex);
1c79356b A	387	}
	388
	389	/*
	390	* Free up any directory cookie structures and
	391	* large file handle structures that might be associated with
	392	* this nfs node.
	393	*/
91447636	394	if (vnode_vtype(vp) == VDIR) {
1c79356b A	395	dp = np->n_cookies.lh_first;
	396	while (dp) {
	397	dp2 = dp;
	398	dp = dp->ndm_list.le_next;
	399	FREE_ZONE((caddr_t)dp2,
	400	sizeof (struct nfsdmap), M_NFSDIROFF);
	401	}
	402	}
	403	if (np->n_fhsize > NFS_SMALLFH) {
91447636	404	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
1c79356b	405	}
91447636	406	vnode_clearfsnode(vp);
1c79356b	407
91447636	408	FREE_ZONE(np, sizeof(struct nfsnode), M_NFSNODE);
1c79356b A	409	return (0);
	410	}
	411