2 * Copyright (c) 1999, 2000 Boris Popov
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 * $FreeBSD: src/sys/nwfs/nwfs_node.c,v 1.3.2.8 2001/12/25 01:44:45 dillon Exp $
33 * $DragonFly: src/sys/vfs/nwfs/nwfs_node.c,v 1.12 2004/08/13 17:51:12 dillon Exp $
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/kernel.h>
40 #include <sys/mount.h>
41 #include <sys/vnode.h>
42 #include <sys/malloc.h>
43 #include <sys/sysctl.h>
45 #include <vm/vm_extern.h>
46 #include <vm/vm_page.h>
47 #include <vm/vm_object.h>
48 #include <sys/queue.h>
50 #include <netproto/ncp/ncp.h>
51 #include <netproto/ncp/ncp_conn.h>
52 #include <netproto/ncp/ncp_subr.h>
55 #include "nwfs_mount.h"
56 #include "nwfs_node.h"
57 #include "nwfs_subr.h"
59 #define NWNOHASH(fhsum) (&nwhashtbl[(fhsum.f_id) & nwnodehash])
61 extern struct vop_ops *nwfs_vnode_vops;
63 static LIST_HEAD(nwnode_hash_head,nwnode) *nwhashtbl;
64 static u_long nwnodehash;
65 static struct lock nwhashlock;
67 MALLOC_DEFINE(M_NWNODE, "NWFS node", "NWFS vnode private part");
68 MALLOC_DEFINE(M_NWFSHASH, "NWFS hash", "NWFS has table");
70 static int nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS);
72 SYSCTL_DECL(_vfs_nwfs);
74 SYSCTL_PROC(_vfs_nwfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
75 NULL, 0, nwfs_sysctl_vnprint, "S,vnlist", "vnode hash");
80 nwhashtbl = hashinit(desiredvnodes, M_NWFSHASH, &nwnodehash);
81 lockinit(&nwhashlock, 0, "nwfshl", 0, 0);
87 free(nwhashtbl, M_NWFSHASH);
91 nwfs_sysctl_vnprint(SYSCTL_HANDLER_ARGS)
94 struct nwnode_hash_head *nhpp;
98 if (nwfs_debuglevel == 0)
100 printf("Name:uc:hc:fid:pfid\n");
101 for(i = 0; i <= nwnodehash; i++) {
102 nhpp = &nwhashtbl[i];
103 LIST_FOREACH(np, nhpp, n_hash) {
106 printf("%s:%d:%d:%d:%d\n",np->n_name,vp->v_usecount,vp->v_holdcnt,
107 np->n_fid.f_id, np->n_fid.f_parent);
114 * Search nwnode with given fid.
115 * Hash list should be locked by caller.
118 nwfs_hashlookup(struct nwmount *nmp, ncpfid fid, struct nwnode **npp)
121 struct nwnode_hash_head *nhpp;
123 nhpp = NWNOHASH(fid);
124 LIST_FOREACH(np, nhpp, n_hash) {
125 if (nmp != np->n_mount || !NWCMPF(&fid, &np->n_fid))
135 * Allocate new nwfsnode/vnode from given nwnode.
136 * Vnode referenced and not locked.
139 nwfs_allocvp(struct mount *mp, ncpfid fid, struct vnode **vpp)
141 struct thread *td = curthread; /* XXX */
143 struct nwnode_hash_head *nhpp;
144 struct nwmount *nmp = VFSTONWFS(mp);
150 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
152 if (nwfs_hashlookup(nmp, fid, &np) == 0) {
154 lwkt_gettoken(&vlock, vp->v_interlock);
155 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
156 if (vget(vp, &vlock, LK_EXCLUSIVE | LK_INTERLOCK, td))
161 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
164 * Do the MALLOC before the getnewvnode since doing so afterward
165 * might cause a bogus v_data pointer to get dereferenced
166 * elsewhere if MALLOC should block.
168 MALLOC(np, struct nwnode *, sizeof *np, M_NWNODE, M_WAITOK | M_ZERO);
169 error = getnewvnode(VT_NWFS, mp, nwfs_vnode_vops, &vp);
178 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
180 * Another process can create vnode while we blocked in malloc() or
181 * getnewvnode(). Rescan list again.
183 if (nwfs_hashlookup(nmp, fid, NULL) == 0) {
193 lockinit(&np->n_lock, 0, "nwnode", VLKTIMEOUT, LK_CANRECURSE);
194 nhpp = NWNOHASH(fid);
195 LIST_INSERT_HEAD(nhpp, np, n_hash);
196 vn_lock(vp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
197 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
202 nwfs_lookupnp(struct nwmount *nmp, ncpfid fid, struct thread *td,
207 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
208 error = nwfs_hashlookup(nmp, fid, npp);
209 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
214 * Free nwnode, and give vnode back to system
216 * nwfs_reclaim(struct vnode *a_vp, struct thread *a_td)
219 nwfs_reclaim(struct vop_reclaim_args *ap)
221 struct vnode *dvp = NULL, *vp = ap->a_vp;
222 struct nwnode *dnp, *np = VTONW(vp);
223 struct nwmount *nmp = VTONWFS(vp);
224 struct thread *td = ap->a_td;
226 NCPVNDEBUG("%s,%d\n", np->n_name, vp->v_usecount);
227 if (np->n_refparent) {
229 if (nwfs_lookupnp(nmp, np->n_parent, td, &dnp) == 0) {
232 NCPVNDEBUG("%s: has no parent ?\n",np->n_name);
235 lockmgr(&nwhashlock, LK_EXCLUSIVE, NULL, td);
236 LIST_REMOVE(np, n_hash);
237 lockmgr(&nwhashlock, LK_RELEASE, NULL, td);
239 if (nmp->n_root == np) {
251 * nwfs_inactive(struct vnode *a_vp, struct thread *a_td)
254 nwfs_inactive(struct vop_inactive_args *ap)
256 struct thread *td = ap->a_td;
258 struct vnode *vp = ap->a_vp;
259 struct nwnode *np = VTONW(vp);
262 KKASSERT(td->td_proc);
263 cred = td->td_proc->p_ucred;
265 NCPVNDEBUG("%s: %d\n", VTONW(vp)->n_name, vp->v_usecount);
267 error = nwfs_vinvalbuf(vp, V_SAVE, td, 1);
268 error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh, td, cred);
271 VOP_UNLOCK(vp, NULL, 0, td);
272 if (np->n_flag & NSHOULDFREE) {
279 * routines to maintain vnode attributes cache
280 * nwfs_attr_cacheenter: unpack np.i to va structure
283 nwfs_attr_cacheenter(struct vnode *vp, struct nw_entry_info *fi)
285 struct nwnode *np = VTONW(vp);
286 struct nwmount *nmp = VTONWFS(vp);
287 struct vattr *va = &np->n_vattr;
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);
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 */
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 */
325 if (np->n_mtime == 0) {
326 np->n_mtime = va->va_mtime.tv_sec;
328 np->n_atime = time_second;
329 np->n_dosfid = fi->DosDirNum;
334 nwfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
336 struct nwnode *np = VTONW(vp);
339 diff = time_second - np->n_atime;
340 if (diff > 2) { /* XXX should be configurable */