Merge FreeBSD rev. 1.8:
[dragonfly.git] / sys / vfs / nwfs / nwfs_node.c
CommitLineData
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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 $
dc62b251 33 * $DragonFly: src/sys/vfs/nwfs/nwfs_node.c,v 1.9 2003/11/10 06:12:17 dillon Exp $
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34 */
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/time.h>
39#include <sys/proc.h>
40#include <sys/mount.h>
41#include <sys/vnode.h>
42#include <sys/malloc.h>
43#include <sys/sysctl.h>
44#include <vm/vm.h>
45#include <vm/vm_extern.h>
46#include <vm/vm_page.h>
47#include <vm/vm_object.h>
48#include <sys/queue.h>
49
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50#include <netproto/ncp/ncp.h>
51#include <netproto/ncp/ncp_conn.h>
52#include <netproto/ncp/ncp_subr.h>
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54#include "nwfs.h"
55#include "nwfs_mount.h"
56#include "nwfs_node.h"
57#include "nwfs_subr.h"
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58
59#define NWNOHASH(fhsum) (&nwhashtbl[(fhsum.f_id) & nwnodehash])
60
61extern vop_t **nwfs_vnodeop_p;
62
63static LIST_HEAD(nwnode_hash_head,nwnode) *nwhashtbl;
64static u_long nwnodehash;
65static struct lock nwhashlock;
66
67MALLOC_DEFINE(M_NWNODE, "NWFS node", "NWFS vnode private part");
68MALLOC_DEFINE(M_NWFSHASH, "NWFS hash", "NWFS has table");
69
70static int nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS);
71
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72SYSCTL_DECL(_vfs_nwfs);
73
74SYSCTL_PROC(_vfs_nwfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
75 NULL, 0, nwfs_sysctl_vnprint, "S,vnlist", "vnode hash");
76
77void
78nwfs_hash_init(void) {
79 nwhashtbl = hashinit(desiredvnodes, M_NWFSHASH, &nwnodehash);
377d4740 80 lockinit(&nwhashlock, 0, "nwfshl", 0, 0);
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81}
82
83void
84nwfs_hash_free(void) {
85 free(nwhashtbl, M_NWFSHASH);
86}
87
88int
89nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS) {
90 struct nwnode *np;
91 struct nwnode_hash_head *nhpp;
92 struct vnode *vp;
93 int i;
94
95 if (nwfs_debuglevel == 0)
96 return 0;
97 printf("Name:uc:hc:fid:pfid\n");
98 for(i = 0; i <= nwnodehash; i++) {
99 nhpp = &nwhashtbl[i];
100 LIST_FOREACH(np, nhpp, n_hash) {
101 vp = NWTOV(np);
102 vprint(NULL, vp);
103 printf("%s:%d:%d:%d:%d\n",np->n_name,vp->v_usecount,vp->v_holdcnt,
104 np->n_fid.f_id, np->n_fid.f_parent);
105 }
106 }
107 return 0;
108}
109
110/*
111 * Search nwnode with given fid.
112 * Hash list should be locked by caller.
113 */
114static int
115nwfs_hashlookup(struct nwmount *nmp, ncpfid fid, struct nwnode **npp)
116{
117 struct nwnode *np;
118 struct nwnode_hash_head *nhpp;
119
120 nhpp = NWNOHASH(fid);
121 LIST_FOREACH(np, nhpp, n_hash) {
122 if (nmp != np->n_mount || !NWCMPF(&fid, &np->n_fid))
123 continue;
124 if (npp)
125 *npp = np;
126 return 0;
127 }
128 return ENOENT;
129}
130
131/*
132 * Allocate new nwfsnode/vnode from given nwnode.
133 * Vnode referenced and not locked.
134 */
135int
136nwfs_allocvp(struct mount *mp, ncpfid fid, struct vnode **vpp)
137{
dadab5e9 138 struct thread *td = curthread; /* XXX */
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139 struct nwnode *np;
140 struct nwnode_hash_head *nhpp;
141 struct nwmount *nmp = VFSTONWFS(mp);
142 struct vnode *vp;
143 int error;
8a8d5d85 144 int gen;
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145
146loop:
dadab5e9 147 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
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148rescan:
149 if (nwfs_hashlookup(nmp, fid, &np) == 0) {
150 vp = NWTOV(np);
8a8d5d85 151 gen = lwkt_gettoken(&vp->v_interlock);
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152 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
153 if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td))
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154 goto loop;
155 *vpp = vp;
156 return(0);
157 }
dadab5e9 158 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
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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;
dadab5e9 175 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
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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;
377d4740 190 lockinit(&np->n_lock, 0, "nwnode", VLKTIMEOUT, LK_CANRECURSE);
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191 nhpp = NWNOHASH(fid);
192 LIST_INSERT_HEAD(nhpp, np, n_hash);
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193 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
194 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
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195 return 0;
196}
197
198int
dadab5e9 199nwfs_lookupnp(struct nwmount *nmp, ncpfid fid, struct thread *td,
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200 struct nwnode **npp)
201{
202 int error;
203
dadab5e9 204 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
984263bc 205 error = nwfs_hashlookup(nmp, fid, npp);
dadab5e9 206 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
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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;
dadab5e9 217 struct thread *a_td;
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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);
dadab5e9 223 struct thread *td = ap->a_td;
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224
225 NCPVNDEBUG("%s,%d\n", np->n_name, vp->v_usecount);
226 if (np->n_refparent) {
227 np->n_refparent = 0;
dadab5e9 228 if (nwfs_lookupnp(nmp, np->n_parent, td, &dnp) == 0) {
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229 dvp = dnp->n_vnode;
230 } else {
231 NCPVNDEBUG("%s: has no parent ?\n",np->n_name);
232 }
233 }
dadab5e9 234 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
984263bc 235 LIST_REMOVE(np, n_hash);
dadab5e9 236 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
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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;
dadab5e9 253 struct thread *a_td;
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254 } */ *ap;
255{
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256 struct thread *td = ap->a_td;
257 struct ucred *cred;
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258 struct vnode *vp = ap->a_vp;
259 struct nwnode *np = VTONW(vp);
260 int error;
261
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262 KKASSERT(td->td_proc);
263 cred = td->td_proc->p_ucred;
264
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265 NCPVNDEBUG("%s: %d\n", VTONW(vp)->n_name, vp->v_usecount);
266 if (np->opened) {
3b568787 267 error = nwfs_vinvalbuf(vp, V_SAVE, td, 1);
dadab5e9 268 error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh, td, cred);
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269 np->opened = 0;
270 }
dadab5e9 271 VOP_UNLOCK(vp, 0, td);
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272 if (np->n_flag & NSHOULDFREE) {
273 cache_purge(vp);
274 vgone(vp);
275 }
276 return (0);
277}
278/*
279 * routines to maintain vnode attributes cache
280 * nwfs_attr_cacheenter: unpack np.i to va structure
281 */
282void
283nwfs_attr_cacheenter(struct vnode *vp, struct nw_entry_info *fi)
284{
285 struct nwnode *np = VTONW(vp);
286 struct nwmount *nmp = VTONWFS(vp);
287 struct vattr *va = &np->n_vattr;
288
289 va->va_type = vp->v_type; /* vnode type (for create) */
290 np->n_nmlen = fi->nameLen;
291 bcopy(fi->entryName, np->n_name, np->n_nmlen);
292 np->n_name[fi->nameLen] = 0;
293 if (vp->v_type == VREG) {
294 if (va->va_size != fi->dataStreamSize) {
295 va->va_size = fi->dataStreamSize;
296 vnode_pager_setsize(vp, va->va_size);
297 }
298 va->va_mode = nmp->m.file_mode; /* files access mode and type */
299 } else if (vp->v_type == VDIR) {
300 va->va_size = 16384; /* should be a better way ... */
301 va->va_mode = nmp->m.dir_mode; /* files access mode and type */
302 } else
303 return;
304 np->n_size = va->va_size;
305 va->va_nlink = 1; /* number of references to file */
306 va->va_uid = nmp->m.uid; /* owner user id */
307 va->va_gid = nmp->m.gid; /* owner group id */
308 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
309 va->va_fileid = np->n_fid.f_id; /* file id */
310 if (va->va_fileid == 0)
311 va->va_fileid = NWFS_ROOT_INO;
312 va->va_blocksize=nmp->connh->nh_conn->buffer_size;/* blocksize preferred for i/o */
313 /* time of last modification */
314 ncp_dos2unixtime(fi->modifyDate, fi->modifyTime, 0, nmp->m.tz, &va->va_mtime);
315 /* time of last access */
316 ncp_dos2unixtime(fi->lastAccessDate, 0, 0, nmp->m.tz, &va->va_atime);
317 va->va_ctime = va->va_mtime; /* time file changed */
318 va->va_gen = VNOVAL; /* generation number of file */
319 va->va_flags = 0; /* flags defined for file */
320 va->va_rdev = VNOVAL; /* device the special file represents */
321 va->va_bytes = va->va_size; /* bytes of disk space held by file */
322 va->va_filerev = 0; /* file modification number */
323 va->va_vaflags = 0; /* operations flags */
324 np->n_vattr = *va;
325 if (np->n_mtime == 0) {
326 np->n_mtime = va->va_mtime.tv_sec;
327 }
328 np->n_atime = time_second;
329 np->n_dosfid = fi->DosDirNum;
330 return;
331}
332
333int
334nwfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
335{
336 struct nwnode *np = VTONW(vp);
337 int diff;
338
339 diff = time_second - np->n_atime;
340 if (diff > 2) { /* XXX should be configurable */
341 return ENOENT;
342 }
343 *va = np->n_vattr;
344 return 0;
345}