Initial import from FreeBSD RELENG_4:
[dragonfly.git] / sys / vfs / nwfs / nwfs_node.c
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1/*
2 * Copyright (c) 1999, 2000 Boris Popov
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Boris Popov.
16 * 4. Neither the name of the author nor the names of any co-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 AUTHOR 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 AUTHOR 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 * $FreeBSD: src/sys/nwfs/nwfs_node.c,v 1.3.2.8 2001/12/25 01:44:45 dillon Exp $
33 */
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/time.h>
38#include <sys/proc.h>
39#include <sys/mount.h>
40#include <sys/vnode.h>
41#include <sys/malloc.h>
42#include <sys/sysctl.h>
43#include <vm/vm.h>
44#include <vm/vm_extern.h>
45#include <vm/vm_page.h>
46#include <vm/vm_object.h>
47#include <sys/queue.h>
48
49#include <netncp/ncp.h>
50#include <netncp/ncp_conn.h>
51#include <netncp/ncp_subr.h>
52
53#include <nwfs/nwfs.h>
54#include <nwfs/nwfs_mount.h>
55#include <nwfs/nwfs_node.h>
56#include <nwfs/nwfs_subr.h>
57
58#define NWNOHASH(fhsum) (&nwhashtbl[(fhsum.f_id) & nwnodehash])
59
60extern vop_t **nwfs_vnodeop_p;
61
62static LIST_HEAD(nwnode_hash_head,nwnode) *nwhashtbl;
63static u_long nwnodehash;
64static struct lock nwhashlock;
65
66MALLOC_DEFINE(M_NWNODE, "NWFS node", "NWFS vnode private part");
67MALLOC_DEFINE(M_NWFSHASH, "NWFS hash", "NWFS has table");
68
69static int nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS);
70
71extern struct linker_set sysctl_vfs_nwfs;
72
73SYSCTL_DECL(_vfs_nwfs);
74
75SYSCTL_PROC(_vfs_nwfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
76 NULL, 0, nwfs_sysctl_vnprint, "S,vnlist", "vnode hash");
77
78void
79nwfs_hash_init(void) {
80 nwhashtbl = hashinit(desiredvnodes, M_NWFSHASH, &nwnodehash);
81 lockinit(&nwhashlock, PVFS, "nwfshl", 0, 0);
82}
83
84void
85nwfs_hash_free(void) {
86 free(nwhashtbl, M_NWFSHASH);
87}
88
89int
90nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS) {
91 struct nwnode *np;
92 struct nwnode_hash_head *nhpp;
93 struct vnode *vp;
94 int i;
95
96 if (nwfs_debuglevel == 0)
97 return 0;
98 printf("Name:uc:hc:fid:pfid\n");
99 for(i = 0; i <= nwnodehash; i++) {
100 nhpp = &nwhashtbl[i];
101 LIST_FOREACH(np, nhpp, n_hash) {
102 vp = NWTOV(np);
103 vprint(NULL, vp);
104 printf("%s:%d:%d:%d:%d\n",np->n_name,vp->v_usecount,vp->v_holdcnt,
105 np->n_fid.f_id, np->n_fid.f_parent);
106 }
107 }
108 return 0;
109}
110
111/*
112 * Search nwnode with given fid.
113 * Hash list should be locked by caller.
114 */
115static int
116nwfs_hashlookup(struct nwmount *nmp, ncpfid fid, struct nwnode **npp)
117{
118 struct nwnode *np;
119 struct nwnode_hash_head *nhpp;
120
121 nhpp = NWNOHASH(fid);
122 LIST_FOREACH(np, nhpp, n_hash) {
123 if (nmp != np->n_mount || !NWCMPF(&fid, &np->n_fid))
124 continue;
125 if (npp)
126 *npp = np;
127 return 0;
128 }
129 return ENOENT;
130}
131
132/*
133 * Allocate new nwfsnode/vnode from given nwnode.
134 * Vnode referenced and not locked.
135 */
136int
137nwfs_allocvp(struct mount *mp, ncpfid fid, struct vnode **vpp)
138{
139 struct proc *p = curproc; /* XXX */
140 struct nwnode *np;
141 struct nwnode_hash_head *nhpp;
142 struct nwmount *nmp = VFSTONWFS(mp);
143 struct vnode *vp;
144 int error;
145
146loop:
147 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, p);
148rescan:
149 if (nwfs_hashlookup(nmp, fid, &np) == 0) {
150 vp = NWTOV(np);
151 simple_lock(&vp->v_interlock);
152 lockmgr(&nwhashlock, LK_RELEASE, NULL, p);
153 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, p))
154 goto loop;
155 *vpp = vp;
156 return(0);
157 }
158 lockmgr(&nwhashlock, LK_RELEASE, NULL, p);
159
160 /*
161 * Do the MALLOC before the getnewvnode since doing so afterward
162 * might cause a bogus v_data pointer to get dereferenced
163 * elsewhere if MALLOC should block.
164 */
165 MALLOC(np, struct nwnode *, sizeof *np, M_NWNODE, M_WAITOK | M_ZERO);
166 error = getnewvnode(VT_NWFS, mp, nwfs_vnodeop_p, &vp);
167 if (error) {
168 *vpp = NULL;
169 FREE(np, M_NWNODE);
170 return (error);
171 }
172 vp->v_data = np;
173 np->n_vnode = vp;
174 np->n_mount = nmp;
175 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, p);
176 /*
177 * Another process can create vnode while we blocked in malloc() or
178 * getnewvnode(). Rescan list again.
179 */
180 if (nwfs_hashlookup(nmp, fid, NULL) == 0) {
181 vp->v_data = NULL;
182 np->n_vnode = NULL;
183 vrele(vp);
184 FREE(np, M_NWNODE);
185 goto rescan;
186 }
187 *vpp = vp;
188 np->n_fid = fid;
189 np->n_flag |= NNEW;
190 lockinit(&np->n_lock, PINOD, "nwnode", VLKTIMEOUT, LK_CANRECURSE);
191 nhpp = NWNOHASH(fid);
192 LIST_INSERT_HEAD(nhpp, np, n_hash);
193 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
194 lockmgr(&nwhashlock, LK_RELEASE, NULL, p);
195 return 0;
196}
197
198int
199nwfs_lookupnp(struct nwmount *nmp, ncpfid fid, struct proc *p,
200 struct nwnode **npp)
201{
202 int error;
203
204 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, p);
205 error = nwfs_hashlookup(nmp, fid, npp);
206 lockmgr(&nwhashlock, LK_RELEASE, NULL, p);
207 return error;
208}
209
210/*
211 * Free nwnode, and give vnode back to system
212 */
213int
214nwfs_reclaim(ap)
215 struct vop_reclaim_args /* {
216 struct vnode *a_vp;
217 struct proc *a_p;
218 } */ *ap;
219{
220 struct vnode *dvp = NULL, *vp = ap->a_vp;
221 struct nwnode *dnp, *np = VTONW(vp);
222 struct nwmount *nmp = VTONWFS(vp);
223 struct proc *p = ap->a_p;
224
225 NCPVNDEBUG("%s,%d\n", np->n_name, vp->v_usecount);
226 if (np->n_refparent) {
227 np->n_refparent = 0;
228 if (nwfs_lookupnp(nmp, np->n_parent, p, &dnp) == 0) {
229 dvp = dnp->n_vnode;
230 } else {
231 NCPVNDEBUG("%s: has no parent ?\n",np->n_name);
232 }
233 }
234 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, p);
235 LIST_REMOVE(np, n_hash);
236 lockmgr(&nwhashlock, LK_RELEASE, NULL, p);
237 cache_purge(vp);
238 if (nmp->n_root == np) {
239 nmp->n_root = NULL;
240 }
241 vp->v_data = NULL;
242 FREE(np, M_NWNODE);
243 if (dvp) {
244 vrele(dvp);
245 }
246 return (0);
247}
248
249int
250nwfs_inactive(ap)
251 struct vop_inactive_args /* {
252 struct vnode *a_vp;
253 struct proc *a_p;
254 } */ *ap;
255{
256 struct proc *p = ap->a_p;
257 struct ucred *cred = p->p_ucred;
258 struct vnode *vp = ap->a_vp;
259 struct nwnode *np = VTONW(vp);
260 int error;
261
262 NCPVNDEBUG("%s: %d\n", VTONW(vp)->n_name, vp->v_usecount);
263 if (np->opened) {
264 error = nwfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
265 error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh, p, cred);
266 np->opened = 0;
267 }
268 VOP_UNLOCK(vp, 0, p);
269 if (np->n_flag & NSHOULDFREE) {
270 cache_purge(vp);
271 vgone(vp);
272 }
273 return (0);
274}
275/*
276 * routines to maintain vnode attributes cache
277 * nwfs_attr_cacheenter: unpack np.i to va structure
278 */
279void
280nwfs_attr_cacheenter(struct vnode *vp, struct nw_entry_info *fi)
281{
282 struct nwnode *np = VTONW(vp);
283 struct nwmount *nmp = VTONWFS(vp);
284 struct vattr *va = &np->n_vattr;
285
286 va->va_type = vp->v_type; /* vnode type (for create) */
287 np->n_nmlen = fi->nameLen;
288 bcopy(fi->entryName, np->n_name, np->n_nmlen);
289 np->n_name[fi->nameLen] = 0;
290 if (vp->v_type == VREG) {
291 if (va->va_size != fi->dataStreamSize) {
292 va->va_size = fi->dataStreamSize;
293 vnode_pager_setsize(vp, va->va_size);
294 }
295 va->va_mode = nmp->m.file_mode; /* files access mode and type */
296 } else if (vp->v_type == VDIR) {
297 va->va_size = 16384; /* should be a better way ... */
298 va->va_mode = nmp->m.dir_mode; /* files access mode and type */
299 } else
300 return;
301 np->n_size = va->va_size;
302 va->va_nlink = 1; /* number of references to file */
303 va->va_uid = nmp->m.uid; /* owner user id */
304 va->va_gid = nmp->m.gid; /* owner group id */
305 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
306 va->va_fileid = np->n_fid.f_id; /* file id */
307 if (va->va_fileid == 0)
308 va->va_fileid = NWFS_ROOT_INO;
309 va->va_blocksize=nmp->connh->nh_conn->buffer_size;/* blocksize preferred for i/o */
310 /* time of last modification */
311 ncp_dos2unixtime(fi->modifyDate, fi->modifyTime, 0, nmp->m.tz, &va->va_mtime);
312 /* time of last access */
313 ncp_dos2unixtime(fi->lastAccessDate, 0, 0, nmp->m.tz, &va->va_atime);
314 va->va_ctime = va->va_mtime; /* time file changed */
315 va->va_gen = VNOVAL; /* generation number of file */
316 va->va_flags = 0; /* flags defined for file */
317 va->va_rdev = VNOVAL; /* device the special file represents */
318 va->va_bytes = va->va_size; /* bytes of disk space held by file */
319 va->va_filerev = 0; /* file modification number */
320 va->va_vaflags = 0; /* operations flags */
321 np->n_vattr = *va;
322 if (np->n_mtime == 0) {
323 np->n_mtime = va->va_mtime.tv_sec;
324 }
325 np->n_atime = time_second;
326 np->n_dosfid = fi->DosDirNum;
327 return;
328}
329
330int
331nwfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
332{
333 struct nwnode *np = VTONW(vp);
334 int diff;
335
336 diff = time_second - np->n_atime;
337 if (diff > 2) { /* XXX should be configurable */
338 return ENOENT;
339 }
340 *va = np->n_vattr;
341 return 0;
342}