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

/*
 * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_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_LICENSE_OSREFERENCE_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;
	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	*
8ad349bb	4	* @APPLE_LICENSE_OSREFERENCE_HEADER_START@
1c79356b	5	*
8ad349bb 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
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
1c79356b A	29	*/
	30	/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
	31	/*
	32	* Copyright (c) 1989, 1993
	33	* The Regents of the University of California. All rights reserved.
	34	*
	35	* This code is derived from software contributed to Berkeley by
	36	* Rick Macklem at The University of Guelph.
	37	*
	38	* Redistribution and use in source and binary forms, with or without
	39	* modification, are permitted provided that the following conditions
	40	* are met:
	41	* 1. Redistributions of source code must retain the above copyright
	42	* notice, this list of conditions and the following disclaimer.
	43	* 2. Redistributions in binary form must reproduce the above copyright
	44	* notice, this list of conditions and the following disclaimer in the
	45	* documentation and/or other materials provided with the distribution.
	46	* 3. All advertising materials mentioning features or use of this software
	47	* must display the following acknowledgement:
	48	* This product includes software developed by the University of
	49	* California, Berkeley and its contributors.
	50	* 4. Neither the name of the University nor the names of its contributors
	51	* may be used to endorse or promote products derived from this software
	52	* without specific prior written permission.
	53	*
	54	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	55	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	56	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	57	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	58	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	59	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	60	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	61	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	62	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	63	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	64	* SUCH DAMAGE.
	65	*
	66	* @(#)nfs_node.c 8.6 (Berkeley) 5/22/95
	67	* FreeBSD-Id: nfs_node.c,v 1.22 1997/10/28 14:06:20 bde Exp $
	68	*/
	69
	70
	71	#include <sys/param.h>
	72	#include <sys/systm.h>
	73	#include <sys/proc.h>
91447636 A	74	#include <sys/kauth.h>
91447636 A	75	#include <sys/mount_internal.h>
1c79356b	76	#include <sys/vnode.h>
91447636	77	#include <sys/ubc.h>
1c79356b A	78	#include <sys/malloc.h>
	79
	80	#include <nfs/rpcv2.h>
	81	#include <nfs/nfsproto.h>
	82	#include <nfs/nfs.h>
	83	#include <nfs/nfsnode.h>
	84	#include <nfs/nfsmount.h>
	85
1c79356b A	86	LIST_HEAD(nfsnodehashhead, nfsnode) *nfsnodehashtbl;
	87	u_long nfsnodehash;
	88
91447636 A	89	lck_grp_t * nfs_node_hash_lck_grp;
	90	lck_grp_attr_t * nfs_node_hash_lck_grp_attr;
	91	lck_attr_t * nfs_node_hash_lck_attr;
	92	lck_mtx_t *nfs_node_hash_mutex;
1c79356b A	93
	94	/*
	95	* Initialize hash links for nfsnodes
	96	* and build nfsnode free list.
	97	*/
	98	void
e5568f75	99	nfs_nhinit(void)
1c79356b A	100	{
1c79356b A	101	nfsnodehashtbl = hashinit(desiredvnodes, M_NFSNODE, &nfsnodehash);
91447636 A	102
91447636 A	103	nfs_node_hash_lck_grp_attr = lck_grp_attr_alloc_init();
91447636 A	104	nfs_node_hash_lck_grp = lck_grp_alloc_init("nfs_node_hash", nfs_node_hash_lck_grp_attr);
	105
	106	nfs_node_hash_lck_attr = lck_attr_alloc_init();
	107
	108	nfs_node_hash_mutex = lck_mtx_alloc_init(nfs_node_hash_lck_grp, nfs_node_hash_lck_attr);
1c79356b A	109	}
	110
	111	/*
	112	* Compute an entry in the NFS hash table structure
	113	*/
	114	u_long
91447636	115	nfs_hash(u_char *fhp, int fhsize)
1c79356b	116	{
91447636 A	117	u_long fhsum;
91447636 A	118	int i;
1c79356b	119
1c79356b A	120	fhsum = 0;
1c79356b A	121	for (i = 0; i < fhsize; i++)
91447636	122	fhsum += *fhp++;
1c79356b A	123	return (fhsum);
	124	}
	125
	126	/*
	127	* Look up a vnode/nfsnode by file handle.
	128	* Callers must check for mount points!!
	129	* In all cases, a pointer to a
	130	* nfsnode structure is returned.
	131	*/
1c79356b	132	int
91447636 A	133	nfs_nget(
	134	mount_t mntp,
	135	vnode_t dvp,
	136	struct componentname *cnp,
	137	u_char *fhp,
	138	int fhsize,
	139	struct nfs_vattr *nvap,
	140	u_int64_t *xidp,
	141	int flags,
	142	struct nfsnode **npp)
1c79356b	143	{
1c79356b A	144	struct nfsnode *np;
1c79356b A	145	struct nfsnodehashhead *nhpp;
91447636	146	vnode_t vp, nvp;
1c79356b	147	int error;
91447636 A	148	mount_t mp;
	149	struct vnode_fsparam vfsp;
	150	uint32_t vid;
1c79356b A	151
1c79356b A	152	/* Check for unmount in progress */
55e303ae	153	if (!mntp \|\| (mntp->mnt_kern_flag & MNTK_UNMOUNT)) {
1c79356b	154	*npp = 0;
55e303ae	155	return (!mntp ? ENXIO : EPERM);
1c79356b A	156	}
	157
	158	nhpp = NFSNOHASH(nfs_hash(fhp, fhsize));
	159	loop:
91447636	160	lck_mtx_lock(nfs_node_hash_mutex);
1c79356b	161	for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
91447636	162	mp = (np->n_flag & NINIT) ? np->n_mount : vnode_mount(NFSTOV(np));
55e303ae	163	if (mntp != mp \|\| np->n_fhsize != fhsize \|\|
91447636	164	bcmp(fhp, np->n_fhp, fhsize))
1c79356b	165	continue;
55e303ae A	166	/* if the node is still being initialized, sleep on it */
	167	if (np->n_flag & NINIT) {
	168	np->n_flag \|= NWINIT;
91447636	169	msleep(np, nfs_node_hash_mutex, PDROP \| PINOD, "nfs_nget", 0);
55e303ae A	170	goto loop;
55e303ae A	171	}
1c79356b	172	vp = NFSTOV(np);
91447636 A	173	vid = vnode_vid(vp);
	174	lck_mtx_unlock(nfs_node_hash_mutex);
	175	if ((error = vnode_getwithvid(vp, vid))) {
	176	/*
	177	* If vnode is being reclaimed or has already
	178	* changed identity, no need to wait.
	179	*/
	180	return (error);
	181	}
	182	/* update attributes */
	183	error = nfs_loadattrcache(np, nvap, xidp, 0);
	184	if (error) {
	185	vnode_put(vp);
	186	} else {
	187	if (dvp && cnp && (flags & NG_MAKEENTRY))
	188	cache_enter(dvp, vp, cnp);
	189	*npp = np;
1c79356b	190	}
91447636	191	return(error);
1c79356b	192	}
1c79356b A	193
1c79356b A	194	/*
55e303ae A	195	* allocate and initialize nfsnode and stick it in the hash
	196	* before calling getnewvnode(). Anyone finding it in the
	197	* hash before initialization is complete will wait for it.
1c79356b A	198	*/
1c79356b A	199	MALLOC_ZONE(np, struct nfsnode , sizeof np, M_NFSNODE, M_WAITOK);
91447636 A	200	if (!np) {
	201	lck_mtx_unlock(nfs_node_hash_mutex);
	202	*npp = 0;
	203	return (ENOMEM);
	204	}
1c79356b	205	bzero((caddr_t)np, sizeof *np);
55e303ae A	206	np->n_flag \|= NINIT;
55e303ae A	207	np->n_mount = mntp;
55e303ae	208
91447636	209	/* setup node's file handle */
1c79356b	210	if (fhsize > NFS_SMALLFH) {
91447636	211	MALLOC_ZONE(np->n_fhp, u_char *,
1c79356b	212	fhsize, M_NFSBIGFH, M_WAITOK);
91447636 A	213	if (!np->n_fhp) {
	214	lck_mtx_unlock(nfs_node_hash_mutex);
	215	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	216	*npp = 0;
	217	return (ENOMEM);
	218	}
	219	} else {
	220	np->n_fhp = &np->n_fh[0];
	221	}
	222	bcopy(fhp, np->n_fhp, fhsize);
1c79356b	223	np->n_fhsize = fhsize;
91447636 A	224
91447636 A	225	/* Insert the nfsnode in the hash queue for its new file handle */
55e303ae	226	np->n_flag \|= NHASHED;
91447636	227	LIST_INSERT_HEAD(nhpp, np, n_hash);
1c79356b	228
55e303ae	229	/* release lock on hash table */
91447636 A	230	lck_mtx_unlock(nfs_node_hash_mutex);
	231
	232	/* do initial loading of attributes */
	233	error = nfs_loadattrcache(np, nvap, xidp, 1);
	234	if (error) {
	235	lck_mtx_lock(nfs_node_hash_mutex);
	236	LIST_REMOVE(np, n_hash);
	237	np->n_flag &= ~(NHASHED\|NINIT);
	238	if (np->n_flag & NWINIT) {
	239	np->n_flag &= ~NWINIT;
	240	wakeup((caddr_t)np);
	241	}
	242	lck_mtx_unlock(nfs_node_hash_mutex);
	243	if (np->n_fhsize > NFS_SMALLFH)
	244	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
	245	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	246	*npp = 0;
	247	return (error);
	248	}
	249	np->n_mtime = nvap->nva_mtime;
	250	if (nvap->nva_type == VDIR)
	251	np->n_ncmtime = nvap->nva_mtime;
	252	NMODEINVALIDATE(np);
1c79356b	253
55e303ae	254	/* now, attempt to get a new vnode */
91447636 A	255	vfsp.vnfs_mp = mntp;
	256	vfsp.vnfs_vtype = nvap->nva_type;
	257	vfsp.vnfs_str = "nfs";
	258	vfsp.vnfs_dvp = dvp;
	259	vfsp.vnfs_fsnode = np;
	260	if (nvap->nva_type == VFIFO)
	261	vfsp.vnfs_vops = fifo_nfsv2nodeop_p;
	262	else if (nvap->nva_type == VBLK \|\| nvap->nva_type == VCHR)
	263	vfsp.vnfs_vops = spec_nfsv2nodeop_p;
	264	else
	265	vfsp.vnfs_vops = nfsv2_vnodeop_p;
	266	vfsp.vnfs_markroot = (flags & NG_MARKROOT) ? 1 : 0;
	267	vfsp.vnfs_marksystem = 0;
	268	vfsp.vnfs_rdev = 0;
	269	vfsp.vnfs_filesize = nvap->nva_size;
	270	vfsp.vnfs_cnp = cnp;
	271	if (dvp && cnp && (flags & NG_MAKEENTRY))
	272	vfsp.vnfs_flags = 0;
	273	else
	274	vfsp.vnfs_flags = VNFS_NOCACHE;
	275	error = vnode_create(VNCREATE_FLAVOR, VCREATESIZE, &vfsp, &nvp);
55e303ae	276	if (error) {
91447636	277	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae	278	LIST_REMOVE(np, n_hash);
91447636 A	279	np->n_flag &= ~(NHASHED\|NINIT);
	280	if (np->n_flag & NWINIT) {
	281	np->n_flag &= ~NWINIT;
	282	wakeup((caddr_t)np);
	283	}
	284	lck_mtx_unlock(nfs_node_hash_mutex);
55e303ae	285	if (np->n_fhsize > NFS_SMALLFH)
91447636	286	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
55e303ae A	287	FREE_ZONE(np, sizeof *np, M_NFSNODE);
	288	*npp = 0;
	289	return (error);
	290	}
	291	vp = nvp;
55e303ae	292	np->n_vnode = vp;
91447636 A	293	vnode_addfsref(vp);
91447636 A	294	vnode_settag(vp, VT_NFS); // XXX shouldn't this be a vnode_create() parameter?
55e303ae	295	*npp = np;
91447636	296	/* node is now initialized */
55e303ae	297
91447636 A	298	/* check if anyone's waiting on this node */
91447636 A	299	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	300	np->n_flag &= ~NINIT;
	301	if (np->n_flag & NWINIT) {
	302	np->n_flag &= ~NWINIT;
	303	wakeup((caddr_t)np);
	304	}
91447636	305	lck_mtx_unlock(nfs_node_hash_mutex);
1c79356b	306
fa4905b1	307	return (error);
1c79356b A	308	}
1c79356b A	309
91447636	310
1c79356b A	311	int
1c79356b A	312	nfs_inactive(ap)
91447636 A	313	struct vnop_inactive_args /* {
	314	struct vnodeop_desc *a_desc;
	315	vnode_t a_vp;
	316	vfs_context_t a_context;
1c79356b A	317	} / ap;
	318	{
	319	register struct nfsnode *np;
	320	register struct sillyrename *sp;
91447636	321	kauth_cred_t cred;
1c79356b A	322
1c79356b A	323	np = VTONFS(ap->a_vp);
91447636	324	if (vnode_vtype(ap->a_vp) != VDIR) {
1c79356b A	325	sp = np->n_sillyrename;
	326	np->n_sillyrename = (struct sillyrename *)0;
	327	} else
	328	sp = (struct sillyrename *)0;
	329
	330	if (sp) {
	331	/*
	332	* Remove the silly file that was rename'd earlier
	333	*/
	334	#if DIAGNOSTIC
91447636 A	335	kprintf("nfs_inactive removing %s, dvp=%x, a_vp=%x, ap=%x, np=%x, sp=%x\n",
	336	&sp->s_name[0], (unsigned)sp->s_dvp, (unsigned)ap->a_vp, (unsigned)ap,
	337	(unsigned)np, (unsigned)sp);
1c79356b	338	#endif
91447636	339	nfs_vinvalbuf(ap->a_vp, 0, sp->s_cred, vfs_context_proc(ap->a_context), 1);
fa4905b1	340	np->n_size = 0;
1c79356b	341	ubc_setsize(ap->a_vp, (off_t)0);
55e303ae A	342	nfs_removeit(sp);
	343	/*
	344	* remove nfsnode from hash now so we can't accidentally find it
	345	* again if another object gets created with the same filehandle
	346	* before this vnode gets reclaimed
	347	*/
91447636	348	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	349	LIST_REMOVE(np, n_hash);
55e303ae A	350	np->n_flag &= ~NHASHED;
91447636	351	lck_mtx_unlock(nfs_node_hash_mutex);
1c79356b A	352	cred = sp->s_cred;
	353	if (cred != NOCRED) {
	354	sp->s_cred = NOCRED;
91447636	355	kauth_cred_rele(cred);
1c79356b	356	}
91447636	357	vnode_rele(sp->s_dvp);
1c79356b	358	FREE_ZONE((caddr_t)sp, sizeof (struct sillyrename), M_NFSREQ);
91447636	359	vnode_recycle(ap->a_vp);
1c79356b	360	}
91447636 A	361	/* clear all flags other than these */
91447636 A	362	np->n_flag &= (NMODIFIED \| NFLUSHINPROG \| NFLUSHWANT \| NHASHED);
1c79356b A	363	return (0);
	364	}
	365
	366	/*
	367	* Reclaim an nfsnode so that it can be used for other purposes.
	368	*/
	369	int
	370	nfs_reclaim(ap)
91447636 A	371	struct vnop_reclaim_args /* {
	372	struct vnodeop_desc *a_desc;
	373	vnode_t a_vp;
	374	vfs_context_t a_context;
1c79356b A	375	} / ap;
1c79356b A	376	{
91447636 A	377	vnode_t vp = ap->a_vp;
	378	struct nfsnode *np = VTONFS(vp);
	379	struct nfsdmap dp, dp2;
1c79356b	380
91447636	381	vnode_removefsref(vp);
1c79356b	382
55e303ae	383	if (np->n_flag & NHASHED) {
91447636	384	lck_mtx_lock(nfs_node_hash_mutex);
55e303ae A	385	LIST_REMOVE(np, n_hash);
55e303ae A	386	np->n_flag &= ~NHASHED;
91447636	387	lck_mtx_unlock(nfs_node_hash_mutex);
1c79356b A	388	}
	389
	390	/*
	391	* Free up any directory cookie structures and
	392	* large file handle structures that might be associated with
	393	* this nfs node.
	394	*/
91447636	395	if (vnode_vtype(vp) == VDIR) {
1c79356b A	396	dp = np->n_cookies.lh_first;
	397	while (dp) {
	398	dp2 = dp;
	399	dp = dp->ndm_list.le_next;
	400	FREE_ZONE((caddr_t)dp2,
	401	sizeof (struct nfsdmap), M_NFSDIROFF);
	402	}
	403	}
	404	if (np->n_fhsize > NFS_SMALLFH) {
91447636	405	FREE_ZONE(np->n_fhp, np->n_fhsize, M_NFSBIGFH);
1c79356b	406	}
91447636	407	vnode_clearfsnode(vp);
1c79356b	408
91447636	409	FREE_ZONE(np, sizeof(struct nfsnode), M_NFSNODE);
1c79356b A	410	return (0);
	411	}
	412