VFS messaging/interfacing work stage 4/99. This stage goes a long ways
[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 $
3446c007 33 * $DragonFly: src/sys/vfs/nwfs/nwfs_node.c,v 1.14 2004/08/28 19:02:24 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>
984263bc 53
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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
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61static LIST_HEAD(nwnode_hash_head,nwnode) *nwhashtbl;
62static u_long nwnodehash;
63static struct lock nwhashlock;
64
65MALLOC_DEFINE(M_NWNODE, "NWFS node", "NWFS vnode private part");
66MALLOC_DEFINE(M_NWFSHASH, "NWFS hash", "NWFS has table");
67
68static int nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS);
69
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70SYSCTL_DECL(_vfs_nwfs);
71
72SYSCTL_PROC(_vfs_nwfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
73 NULL, 0, nwfs_sysctl_vnprint, "S,vnlist", "vnode hash");
74
75void
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76nwfs_hash_init(void)
77{
984263bc 78 nwhashtbl = hashinit(desiredvnodes, M_NWFSHASH, &nwnodehash);
377d4740 79 lockinit(&nwhashlock, 0, "nwfshl", 0, 0);
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80}
81
82void
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83nwfs_hash_free(void)
84{
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85 free(nwhashtbl, M_NWFSHASH);
86}
87
88int
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89nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS)
90{
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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{
dadab5e9 139 struct thread *td = curthread; /* XXX */
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140 struct nwnode *np;
141 struct nwnode_hash_head *nhpp;
142 struct nwmount *nmp = VFSTONWFS(mp);
143 struct vnode *vp;
41a01a4d 144 lwkt_tokref vlock;
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145 int error;
146
147loop:
dadab5e9 148 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
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149rescan:
150 if (nwfs_hashlookup(nmp, fid, &np) == 0) {
151 vp = NWTOV(np);
41a01a4d 152 lwkt_gettoken(&vlock, vp->v_interlock);
dadab5e9 153 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
41a01a4d 154 if (vget(vp, &vlock, LK_EXCLUSIVE | LK_INTERLOCK, td))
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155 goto loop;
156 *vpp = vp;
157 return(0);
158 }
dadab5e9 159 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
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160
161 /*
162 * Do the MALLOC before the getnewvnode since doing so afterward
163 * might cause a bogus v_data pointer to get dereferenced
164 * elsewhere if MALLOC should block.
165 */
166 MALLOC(np, struct nwnode *, sizeof *np, M_NWNODE, M_WAITOK | M_ZERO);
3446c007 167 error = getnewvnode(VT_NWFS, mp, mp->mnt_vn_ops, &vp, 0, 0);
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168 if (error) {
169 *vpp = NULL;
170 FREE(np, M_NWNODE);
171 return (error);
172 }
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173 np->n_vnode = vp;
174 np->n_mount = nmp;
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175 lockmgr(&vp->v_lock, LK_EXCLUSIVE, NULL, td);
176
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177 /*
178 * Another process can create vnode while we blocked in malloc() or
179 * getnewvnode(). Rescan list again.
180 */
3446c007 181 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
984263bc 182 if (nwfs_hashlookup(nmp, fid, NULL) == 0) {
984263bc 183 np->n_vnode = NULL;
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184 vput(vp);
185 free(np, M_NWNODE);
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186 goto rescan;
187 }
188 *vpp = vp;
3446c007 189 vp->v_data = np;
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190 np->n_fid = fid;
191 np->n_flag |= NNEW;
377d4740 192 lockinit(&np->n_lock, 0, "nwnode", VLKTIMEOUT, LK_CANRECURSE);
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193 nhpp = NWNOHASH(fid);
194 LIST_INSERT_HEAD(nhpp, np, n_hash);
dadab5e9 195 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
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196 return 0;
197}
198
199int
dadab5e9 200nwfs_lookupnp(struct nwmount *nmp, ncpfid fid, struct thread *td,
a9bb80e0 201 struct nwnode **npp)
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202{
203 int error;
204
dadab5e9 205 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
984263bc 206 error = nwfs_hashlookup(nmp, fid, npp);
dadab5e9 207 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
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208 return error;
209}
210
211/*
212 * Free nwnode, and give vnode back to system
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213 *
214 * nwfs_reclaim(struct vnode *a_vp, struct thread *a_td)
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215 */
216int
a9bb80e0 217nwfs_reclaim(struct vop_reclaim_args *ap)
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218{
219 struct vnode *dvp = NULL, *vp = ap->a_vp;
220 struct nwnode *dnp, *np = VTONW(vp);
221 struct nwmount *nmp = VTONWFS(vp);
dadab5e9 222 struct thread *td = ap->a_td;
984263bc 223
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224 NCPVNDEBUG("%s,%d\n", (np ? np->n_name : "?"), vp->v_usecount);
225 if (np && np->n_refparent) {
984263bc 226 np->n_refparent = 0;
dadab5e9 227 if (nwfs_lookupnp(nmp, np->n_parent, td, &dnp) == 0) {
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228 dvp = dnp->n_vnode;
229 } else {
230 NCPVNDEBUG("%s: has no parent ?\n",np->n_name);
231 }
232 }
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233 if (np) {
234 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
235 LIST_REMOVE(np, n_hash);
236 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
237 }
984263bc 238 cache_purge(vp);
3446c007 239 if (nmp->n_root == np)
984263bc 240 nmp->n_root = NULL;
984263bc 241 vp->v_data = NULL;
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242 if (np)
243 free(np, M_NWNODE);
244 if (dvp)
984263bc 245 vrele(dvp);
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246 return (0);
247}
248
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249/*
250 * nwfs_inactive(struct vnode *a_vp, struct thread *a_td)
251 */
984263bc 252int
a9bb80e0 253nwfs_inactive(struct vop_inactive_args *ap)
984263bc 254{
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255 struct thread *td = ap->a_td;
256 struct ucred *cred;
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257 struct vnode *vp = ap->a_vp;
258 struct nwnode *np = VTONW(vp);
259 int error;
260
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261 KKASSERT(td->td_proc);
262 cred = td->td_proc->p_ucred;
263
984263bc 264 NCPVNDEBUG("%s: %d\n", VTONW(vp)->n_name, vp->v_usecount);
3446c007 265 if (np && np->opened) {
3b568787 266 error = nwfs_vinvalbuf(vp, V_SAVE, td, 1);
dadab5e9 267 error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh, td, cred);
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268 np->opened = 0;
269 }
41a01a4d 270 VOP_UNLOCK(vp, NULL, 0, td);
3446c007 271 if (np == NULL || (np->n_flag & NSHOULDFREE)) {
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272 cache_purge(vp);
273 vgone(vp);
274 }
275 return (0);
276}
277/*
278 * routines to maintain vnode attributes cache
279 * nwfs_attr_cacheenter: unpack np.i to va structure
280 */
281void
282nwfs_attr_cacheenter(struct vnode *vp, struct nw_entry_info *fi)
283{
284 struct nwnode *np = VTONW(vp);
285 struct nwmount *nmp = VTONWFS(vp);
286 struct vattr *va = &np->n_vattr;
287
288 va->va_type = vp->v_type; /* vnode type (for create) */
289 np->n_nmlen = fi->nameLen;
290 bcopy(fi->entryName, np->n_name, np->n_nmlen);
291 np->n_name[fi->nameLen] = 0;
292 if (vp->v_type == VREG) {
293 if (va->va_size != fi->dataStreamSize) {
294 va->va_size = fi->dataStreamSize;
295 vnode_pager_setsize(vp, va->va_size);
296 }
297 va->va_mode = nmp->m.file_mode; /* files access mode and type */
298 } else if (vp->v_type == VDIR) {
299 va->va_size = 16384; /* should be a better way ... */
300 va->va_mode = nmp->m.dir_mode; /* files access mode and type */
301 } else
302 return;
303 np->n_size = va->va_size;
304 va->va_nlink = 1; /* number of references to file */
305 va->va_uid = nmp->m.uid; /* owner user id */
306 va->va_gid = nmp->m.gid; /* owner group id */
307 va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
308 va->va_fileid = np->n_fid.f_id; /* file id */
309 if (va->va_fileid == 0)
310 va->va_fileid = NWFS_ROOT_INO;
311 va->va_blocksize=nmp->connh->nh_conn->buffer_size;/* blocksize preferred for i/o */
312 /* time of last modification */
313 ncp_dos2unixtime(fi->modifyDate, fi->modifyTime, 0, nmp->m.tz, &va->va_mtime);
314 /* time of last access */
315 ncp_dos2unixtime(fi->lastAccessDate, 0, 0, nmp->m.tz, &va->va_atime);
316 va->va_ctime = va->va_mtime; /* time file changed */
317 va->va_gen = VNOVAL; /* generation number of file */
318 va->va_flags = 0; /* flags defined for file */
319 va->va_rdev = VNOVAL; /* device the special file represents */
320 va->va_bytes = va->va_size; /* bytes of disk space held by file */
321 va->va_filerev = 0; /* file modification number */
322 va->va_vaflags = 0; /* operations flags */
323 np->n_vattr = *va;
324 if (np->n_mtime == 0) {
325 np->n_mtime = va->va_mtime.tv_sec;
326 }
327 np->n_atime = time_second;
328 np->n_dosfid = fi->DosDirNum;
329 return;
330}
331
332int
333nwfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
334{
335 struct nwnode *np = VTONW(vp);
336 int diff;
337
338 diff = time_second - np->n_atime;
339 if (diff > 2) { /* XXX should be configurable */
340 return ENOENT;
341 }
342 *va = np->n_vattr;
343 return 0;
344}