2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * from nfs_node.c 8.6 (Berkeley) 5/22/95
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <sys/param.h>
39 #include <sys/systm.h>
40 #include <sys/fcntl.h>
42 #include <sys/malloc.h>
43 #include <sys/mount.h>
44 #include <sys/namei.h>
46 #include <sys/socket.h>
47 #include <sys/sysctl.h>
48 #include <sys/vnode.h>
52 #include <fs/nfs/nfsport.h>
53 #include <fs/nfsclient/nfsnode.h>
54 #include <fs/nfsclient/nfsmount.h>
55 #include <fs/nfsclient/nfs.h>
57 #include <nfs/nfs_lock.h>
59 extern struct vop_vector newnfs_vnodeops;
60 extern struct buf_ops buf_ops_newnfs;
61 MALLOC_DECLARE(M_NEWNFSREQ);
63 uma_zone_t newnfsnode_zone;
69 newnfsnode_zone = uma_zcreate("NCLNODE", sizeof(struct nfsnode), NULL,
70 NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
76 uma_zdestroy(newnfsnode_zone);
80 * ONLY USED FOR THE ROOT DIRECTORY. nfscl_nget() does the rest. If this
81 * function is going to be used to get Regular Files, code must be added
82 * to fill in the "struct nfsv4node".
83 * Look up a vnode/nfsnode by file handle.
84 * Callers must check for mount points!!
85 * In all cases, a pointer to a
86 * nfsnode structure is returned.
89 ncl_nget(struct mount *mntp, u_int8_t *fhp, int fhsize, struct nfsnode **npp)
91 struct thread *td = curthread; /* XXX */
100 nmp = VFSTONFS(mntp);
103 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT);
105 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
107 bcopy(fhp, &nfhp->nfh_fh[0], fhsize);
108 nfhp->nfh_len = fhsize;
109 error = vfs_hash_get(mntp, hash, LK_EXCLUSIVE,
110 td, &nvp, newnfs_vncmpf, nfhp);
120 * Allocate before getnewvnode since doing so afterward
121 * might cause a bogus v_data pointer to get dereferenced
122 * elsewhere if zalloc should block.
124 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO);
126 error = getnewvnode("newnfs", mntp, &newnfs_vnodeops, &nvp);
128 uma_zfree(newnfsnode_zone, np);
132 vp->v_bufobj.bo_ops = &buf_ops_newnfs;
136 * Initialize the mutex even if the vnode is going to be a loser.
137 * This simplifies the logic in reclaim, which can then unconditionally
138 * destroy the mutex (in the case of the loser, or if hash_insert
139 * happened to return an error no special casing is needed).
141 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK);
143 * NFS supports recursive and shared locking.
148 * Are we getting the root? If so, make sure the vnode flags
151 if ((fhsize == nmp->nm_fhsize) &&
152 !bcmp(fhp, nmp->nm_fh, fhsize)) {
153 if (vp->v_type == VNON)
155 vp->v_vflag |= VV_ROOT;
158 MALLOC(np->n_fhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
160 bcopy(fhp, np->n_fhp->nfh_fh, fhsize);
161 np->n_fhp->nfh_len = fhsize;
162 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
163 error = insmntque(vp, mntp);
166 FREE((caddr_t)np->n_fhp, M_NFSFH);
167 mtx_destroy(&np->n_mtx);
168 uma_zfree(newnfsnode_zone, np);
171 error = vfs_hash_insert(vp, hash, LK_EXCLUSIVE,
172 td, &nvp, newnfs_vncmpf, np->n_fhp);
177 /* vfs_hash_insert() vput()'s the losing vnode */
186 ncl_inactive(struct vop_inactive_args *ap)
189 struct sillyrename *sp;
190 struct vnode *vp = ap->a_vp;
194 if (NFS_ISV4(vp) && vp->v_type == VREG) {
196 * Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4
197 * Close operations are delayed until now. Any dirty buffers
198 * must be flushed before the close, so that the stateid is
199 * available for the writes.
201 (void) ncl_flush(vp, MNT_WAIT, NULL, ap->a_td, 1, 0);
202 (void) nfsrpc_close(vp, 1, ap->a_td);
205 if (vp->v_type != VDIR) {
206 sp = np->n_sillyrename;
207 np->n_sillyrename = NULL;
211 (void) ncl_vinvalbuf(vp, 0, ap->a_td, 1);
213 * Remove the silly file that was rename'd earlier
215 ncl_removeit(sp, vp);
218 FREE((caddr_t)sp, M_NEWNFSREQ);
220 np->n_flag &= NMODIFIED;
225 * Reclaim an nfsnode so that it can be used for other purposes.
228 ncl_reclaim(struct vop_reclaim_args *ap)
230 struct vnode *vp = ap->a_vp;
231 struct nfsnode *np = VTONFS(vp);
232 struct nfsdmap *dp, *dp2;
234 if (NFS_ISV4(vp) && vp->v_type == VREG)
236 * Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4
237 * Close operations are delayed until ncl_inactive().
238 * However, since VOP_INACTIVE() is not guaranteed to be
239 * called, we need to do it again here.
241 (void) nfsrpc_close(vp, 1, ap->a_td);
244 * If the NLM is running, give it a chance to abort pending
247 if (nfs_reclaim_p != NULL)
251 * Destroy the vm object and flush associated pages.
253 vnode_destroy_vobject(vp);
258 * Call nfscl_reclaimnode() to save attributes in the delegation,
261 if (vp->v_type == VREG)
262 nfscl_reclaimnode(vp);
265 * Free up any directory cookie structures and
266 * large file handle structures that might be associated with
269 if (vp->v_type == VDIR) {
270 dp = LIST_FIRST(&np->n_cookies);
273 dp = LIST_NEXT(dp, ndm_list);
274 FREE((caddr_t)dp2, M_NFSDIROFF);
277 FREE((caddr_t)np->n_fhp, M_NFSFH);
278 if (np->n_v4 != NULL)
279 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
280 mtx_destroy(&np->n_mtx);
281 uma_zfree(newnfsnode_zone, vp->v_data);
287 * Invalidate both the access and attribute caches for this vnode.
290 ncl_invalcaches(struct vnode *vp)
292 struct nfsnode *np = VTONFS(vp);
295 mtx_lock(&np->n_mtx);
296 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
297 np->n_accesscache[i].stamp = 0;
299 mtx_unlock(&np->n_mtx);