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/taskqueue.h>
49 #include <sys/vnode.h>
53 #include <fs/nfs/nfsport.h>
54 #include <fs/nfsclient/nfsnode.h>
55 #include <fs/nfsclient/nfsmount.h>
56 #include <fs/nfsclient/nfs.h>
57 #include <fs/nfsclient/nfs_kdtrace.h>
59 #include <nfs/nfs_lock.h>
61 extern struct vop_vector newnfs_vnodeops;
62 extern struct buf_ops buf_ops_newnfs;
63 MALLOC_DECLARE(M_NEWNFSREQ);
65 uma_zone_t newnfsnode_zone;
67 static void nfs_freesillyrename(void *arg, __unused int pending);
73 newnfsnode_zone = uma_zcreate("NCLNODE", sizeof(struct nfsnode), NULL,
74 NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
80 uma_zdestroy(newnfsnode_zone);
84 * ONLY USED FOR THE ROOT DIRECTORY. nfscl_nget() does the rest. If this
85 * function is going to be used to get Regular Files, code must be added
86 * to fill in the "struct nfsv4node".
87 * Look up a vnode/nfsnode by file handle.
88 * Callers must check for mount points!!
89 * In all cases, a pointer to a
90 * nfsnode structure is returned.
93 ncl_nget(struct mount *mntp, u_int8_t *fhp, int fhsize, struct nfsnode **npp,
96 struct thread *td = curthread; /* XXX */
102 struct nfsmount *nmp;
105 nmp = VFSTONFS(mntp);
108 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT);
110 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
112 bcopy(fhp, &nfhp->nfh_fh[0], fhsize);
113 nfhp->nfh_len = fhsize;
114 error = vfs_hash_get(mntp, hash, lkflags,
115 td, &nvp, newnfs_vncmpf, nfhp);
123 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO);
125 error = getnewvnode("nfs", mntp, &newnfs_vnodeops, &nvp);
127 uma_zfree(newnfsnode_zone, np);
131 KASSERT(vp->v_bufobj.bo_bsize != 0, ("ncl_nget: bo_bsize == 0"));
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.
145 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
149 * Are we getting the root? If so, make sure the vnode flags
152 if ((fhsize == nmp->nm_fhsize) &&
153 !bcmp(fhp, nmp->nm_fh, fhsize)) {
154 if (vp->v_type == VNON)
156 vp->v_vflag |= VV_ROOT;
159 MALLOC(np->n_fhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
161 bcopy(fhp, np->n_fhp->nfh_fh, fhsize);
162 np->n_fhp->nfh_len = fhsize;
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, lkflags,
172 td, &nvp, newnfs_vncmpf, np->n_fhp);
177 /* vfs_hash_insert() vput()'s the losing vnode */
186 * Do the vrele(sp->s_dvp) as a separate task in order to avoid a
187 * deadlock because of a LOR when vrele() locks the directory vnode.
190 nfs_freesillyrename(void *arg, __unused int pending)
192 struct sillyrename *sp;
196 free(sp, M_NEWNFSREQ);
200 ncl_inactive(struct vop_inactive_args *ap)
203 struct sillyrename *sp;
204 struct vnode *vp = ap->a_vp;
209 if (NFS_ISV4(vp) && vp->v_type == VREG) {
211 * Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4
212 * Close operations are delayed until now. Any dirty
213 * buffers/pages must be flushed before the close, so that the
214 * stateid is available for the writes.
216 if (vp->v_object != NULL) {
217 VM_OBJECT_WLOCK(vp->v_object);
218 retv = vm_object_page_clean(vp->v_object, 0, 0,
220 VM_OBJECT_WUNLOCK(vp->v_object);
224 (void)ncl_flush(vp, MNT_WAIT, NULL, ap->a_td, 1, 0);
225 (void)nfsrpc_close(vp, 1, ap->a_td);
229 mtx_lock(&np->n_mtx);
230 if (vp->v_type != VDIR) {
231 sp = np->n_sillyrename;
232 np->n_sillyrename = NULL;
236 mtx_unlock(&np->n_mtx);
237 (void) ncl_vinvalbuf(vp, 0, ap->a_td, 1);
239 * Remove the silly file that was rename'd earlier
241 ncl_removeit(sp, vp);
243 TASK_INIT(&sp->s_task, 0, nfs_freesillyrename, sp);
244 taskqueue_enqueue(taskqueue_thread, &sp->s_task);
245 mtx_lock(&np->n_mtx);
247 np->n_flag &= NMODIFIED;
248 mtx_unlock(&np->n_mtx);
253 * Reclaim an nfsnode so that it can be used for other purposes.
256 ncl_reclaim(struct vop_reclaim_args *ap)
258 struct vnode *vp = ap->a_vp;
259 struct nfsnode *np = VTONFS(vp);
260 struct nfsdmap *dp, *dp2;
263 * If the NLM is running, give it a chance to abort pending
266 if (nfs_reclaim_p != NULL)
270 * Destroy the vm object and flush associated pages.
272 vnode_destroy_vobject(vp);
274 if (NFS_ISV4(vp) && vp->v_type == VREG)
276 * We can now safely close any remaining NFSv4 Opens for
277 * this file. Most opens will have already been closed by
278 * ncl_inactive(), but there are cases where it is not
279 * called, so we need to do it again here.
281 (void) nfsrpc_close(vp, 1, ap->a_td);
286 * Call nfscl_reclaimnode() to save attributes in the delegation,
289 if (vp->v_type == VREG)
290 nfscl_reclaimnode(vp);
293 * Free up any directory cookie structures and
294 * large file handle structures that might be associated with
297 if (vp->v_type == VDIR) {
298 dp = LIST_FIRST(&np->n_cookies);
301 dp = LIST_NEXT(dp, ndm_list);
302 FREE((caddr_t)dp2, M_NFSDIROFF);
305 if (np->n_writecred != NULL)
306 crfree(np->n_writecred);
307 FREE((caddr_t)np->n_fhp, M_NFSFH);
308 if (np->n_v4 != NULL)
309 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
310 mtx_destroy(&np->n_mtx);
311 uma_zfree(newnfsnode_zone, vp->v_data);
317 * Invalidate both the access and attribute caches for this vnode.
320 ncl_invalcaches(struct vnode *vp)
322 struct nfsnode *np = VTONFS(vp);
325 mtx_lock(&np->n_mtx);
326 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
327 np->n_accesscache[i].stamp = 0;
328 KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
330 KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
331 mtx_unlock(&np->n_mtx);