1/*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
19 *
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
30 * SUCH DAMAGE.
31 *
32 * from nfs_node.c 8.6 (Berkeley) 5/22/95
33 */
34
35#include <sys/cdefs.h>
|
36__FBSDID("$FreeBSD: head/sys/fs/nfsclient/nfs_clnode.c 215548 2010-11-19 21:17:34Z kib $");
|
| 36__FBSDID("$FreeBSD: head/sys/fs/nfsclient/nfs_clnode.c 220731 2011-04-16 22:15:59Z rmacklem $"); |
37
38#include <sys/param.h>
39#include <sys/systm.h>
40#include <sys/fcntl.h>
41#include <sys/lock.h>
42#include <sys/malloc.h>
43#include <sys/mount.h>
44#include <sys/namei.h>
45#include <sys/proc.h>
46#include <sys/socket.h>
47#include <sys/sysctl.h>
48#include <sys/vnode.h>
49
50#include <vm/uma.h>
51
52#include <fs/nfs/nfsport.h>
53#include <fs/nfsclient/nfsnode.h>
54#include <fs/nfsclient/nfsmount.h>
55#include <fs/nfsclient/nfs.h>
56
57#include <nfs/nfs_lock.h>
58
59extern struct vop_vector newnfs_vnodeops;
60extern struct buf_ops buf_ops_newnfs;
61MALLOC_DECLARE(M_NEWNFSREQ);
62
63uma_zone_t newnfsnode_zone;
64
65void
66ncl_nhinit(void)
67{
68
69 newnfsnode_zone = uma_zcreate("NCLNODE", sizeof(struct nfsnode), NULL,
70 NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
71}
72
73void
74ncl_nhuninit(void)
75{
76 uma_zdestroy(newnfsnode_zone);
77}
78
79/*
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.
87 */
88int
89ncl_nget(struct mount *mntp, u_int8_t *fhp, int fhsize, struct nfsnode **npp)
90{
91 struct thread *td = curthread; /* XXX */
92 struct nfsnode *np;
93 struct vnode *vp;
94 struct vnode *nvp;
95 int error;
96 u_int hash;
97 struct nfsmount *nmp;
98 struct nfsfh *nfhp;
99
100 nmp = VFSTONFS(mntp);
101 *npp = NULL;
102
103 hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT);
104
105 MALLOC(nfhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
106 M_NFSFH, M_WAITOK);
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);
111 FREE(nfhp, M_NFSFH);
112 if (error)
113 return (error);
114 if (nvp != NULL) {
115 *npp = VTONFS(nvp);
116 return (0);
117 }
118
119 /*
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.
123 */
124 np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO);
125
126 error = getnewvnode("newnfs", mntp, &newnfs_vnodeops, &nvp);
127 if (error) {
128 uma_zfree(newnfsnode_zone, np);
129 return (error);
130 }
131 vp = nvp;
132 vp->v_bufobj.bo_ops = &buf_ops_newnfs;
133 vp->v_data = np;
134 np->n_vnode = vp;
135 /*
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).
140 */
141 mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK);
142 /*
143 * NFS supports recursive and shared locking.
144 */
145 lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
146 VN_LOCK_AREC(vp);
147 VN_LOCK_ASHARE(vp);
148 /*
149 * Are we getting the root? If so, make sure the vnode flags
150 * are correct
151 */
152 if ((fhsize == nmp->nm_fhsize) &&
153 !bcmp(fhp, nmp->nm_fh, fhsize)) {
154 if (vp->v_type == VNON)
155 vp->v_type = VDIR;
156 vp->v_vflag |= VV_ROOT;
157 }
158
159 MALLOC(np->n_fhp, struct nfsfh *, sizeof (struct nfsfh) + fhsize,
160 M_NFSFH, M_WAITOK);
161 bcopy(fhp, np->n_fhp->nfh_fh, fhsize);
162 np->n_fhp->nfh_len = fhsize;
163 error = insmntque(vp, mntp);
164 if (error != 0) {
165 *npp = NULL;
166 FREE((caddr_t)np->n_fhp, M_NFSFH);
167 mtx_destroy(&np->n_mtx);
168 uma_zfree(newnfsnode_zone, np);
169 return (error);
170 }
171 error = vfs_hash_insert(vp, hash, LK_EXCLUSIVE,
172 td, &nvp, newnfs_vncmpf, np->n_fhp);
173 if (error)
174 return (error);
175 if (nvp != NULL) {
176 *npp = VTONFS(nvp);
177 /* vfs_hash_insert() vput()'s the losing vnode */
178 return (0);
179 }
180 *npp = np;
181
182 return (0);
183}
184
185int
186ncl_inactive(struct vop_inactive_args *ap)
187{
188 struct nfsnode *np;
189 struct sillyrename *sp;
190 struct vnode *vp = ap->a_vp;
191
192 np = VTONFS(vp);
193
194 if (NFS_ISV4(vp) && vp->v_type == VREG) {
195 /*
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.
200 */
201 (void) ncl_flush(vp, MNT_WAIT, NULL, ap->a_td, 1, 0);
202 (void) nfsrpc_close(vp, 1, ap->a_td);
203 }
204
|
| 205 mtx_lock(&np->n_mtx); |
206 if (vp->v_type != VDIR) {
207 sp = np->n_sillyrename;
208 np->n_sillyrename = NULL;
209 } else
210 sp = NULL;
211 if (sp) {
|
| 212 mtx_unlock(&np->n_mtx); |
213 (void) ncl_vinvalbuf(vp, 0, ap->a_td, 1);
214 /*
215 * Remove the silly file that was rename'd earlier
216 */
217 ncl_removeit(sp, vp);
218 crfree(sp->s_cred);
219 vrele(sp->s_dvp);
220 FREE((caddr_t)sp, M_NEWNFSREQ);
|
| 221 mtx_lock(&np->n_mtx); |
222 }
223 np->n_flag &= NMODIFIED;
|
| 224 mtx_unlock(&np->n_mtx); |
225 return (0);
226}
227
228/*
229 * Reclaim an nfsnode so that it can be used for other purposes.
230 */
231int
232ncl_reclaim(struct vop_reclaim_args *ap)
233{
234 struct vnode *vp = ap->a_vp;
235 struct nfsnode *np = VTONFS(vp);
236 struct nfsdmap *dp, *dp2;
237
238 if (NFS_ISV4(vp) && vp->v_type == VREG)
239 /*
240 * Since mmap()'d files do I/O after VOP_CLOSE(), the NFSv4
241 * Close operations are delayed until ncl_inactive().
242 * However, since VOP_INACTIVE() is not guaranteed to be
243 * called, we need to do it again here.
244 */
245 (void) nfsrpc_close(vp, 1, ap->a_td);
246
247 /*
248 * If the NLM is running, give it a chance to abort pending
249 * locks.
250 */
251 if (nfs_reclaim_p != NULL)
252 nfs_reclaim_p(ap);
253
254 /*
255 * Destroy the vm object and flush associated pages.
256 */
257 vnode_destroy_vobject(vp);
258
259 vfs_hash_remove(vp);
260
261 /*
262 * Call nfscl_reclaimnode() to save attributes in the delegation,
263 * as required.
264 */
265 if (vp->v_type == VREG)
266 nfscl_reclaimnode(vp);
267
268 /*
269 * Free up any directory cookie structures and
270 * large file handle structures that might be associated with
271 * this nfs node.
272 */
273 if (vp->v_type == VDIR) {
274 dp = LIST_FIRST(&np->n_cookies);
275 while (dp) {
276 dp2 = dp;
277 dp = LIST_NEXT(dp, ndm_list);
278 FREE((caddr_t)dp2, M_NFSDIROFF);
279 }
280 }
281 FREE((caddr_t)np->n_fhp, M_NFSFH);
282 if (np->n_v4 != NULL)
283 FREE((caddr_t)np->n_v4, M_NFSV4NODE);
284 mtx_destroy(&np->n_mtx);
285 uma_zfree(newnfsnode_zone, vp->v_data);
286 vp->v_data = NULL;
287 return (0);
288}
289
290/*
291 * Invalidate both the access and attribute caches for this vnode.
292 */
293void
294ncl_invalcaches(struct vnode *vp)
295{
296 struct nfsnode *np = VTONFS(vp);
297 int i;
298
299 mtx_lock(&np->n_mtx);
300 for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
301 np->n_accesscache[i].stamp = 0;
302 np->n_attrstamp = 0;
303 mtx_unlock(&np->n_mtx);
304}
305
|