subr.c revision 1.21 1 1.21 pooka /* $NetBSD: subr.c,v 1.21 2007/05/20 17:47:12 pooka Exp $ */
2 1.1 pooka
3 1.1 pooka /*
4 1.1 pooka * Copyright (c) 2006 Antti Kantee. All Rights Reserved.
5 1.1 pooka *
6 1.1 pooka * Redistribution and use in source and binary forms, with or without
7 1.1 pooka * modification, are permitted provided that the following conditions
8 1.1 pooka * are met:
9 1.1 pooka * 1. Redistributions of source code must retain the above copyright
10 1.1 pooka * notice, this list of conditions and the following disclaimer.
11 1.1 pooka * 2. Redistributions in binary form must reproduce the above copyright
12 1.1 pooka * notice, this list of conditions and the following disclaimer in the
13 1.1 pooka * documentation and/or other materials provided with the distribution.
14 1.1 pooka * 3. The name of the company nor the name of the author may be used to
15 1.1 pooka * endorse or promote products derived from this software without specific
16 1.1 pooka * prior written permission.
17 1.1 pooka *
18 1.1 pooka * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
19 1.1 pooka * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 1.1 pooka * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 1.1 pooka * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 1.1 pooka * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 1.1 pooka * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 1.1 pooka * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 1.1 pooka * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 1.1 pooka * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 1.1 pooka * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 1.1 pooka * SUCH DAMAGE.
29 1.1 pooka */
30 1.1 pooka
31 1.1 pooka #include <sys/cdefs.h>
32 1.1 pooka #ifndef lint
33 1.21 pooka __RCSID("$NetBSD: subr.c,v 1.21 2007/05/20 17:47:12 pooka Exp $");
34 1.1 pooka #endif /* !lint */
35 1.1 pooka
36 1.1 pooka #include <assert.h>
37 1.1 pooka #include <errno.h>
38 1.1 pooka #include <puffs.h>
39 1.1 pooka #include <stdlib.h>
40 1.1 pooka #include <util.h>
41 1.1 pooka
42 1.1 pooka #include "psshfs.h"
43 1.1 pooka #include "sftp_proto.h"
44 1.1 pooka
45 1.1 pooka static void
46 1.1 pooka freedircache(struct psshfs_dir *base, size_t count)
47 1.1 pooka {
48 1.1 pooka int i;
49 1.1 pooka
50 1.1 pooka for (i = 0; i < count; i++) {
51 1.1 pooka free(base[i].entryname);
52 1.1 pooka base[i].entryname = NULL;
53 1.1 pooka }
54 1.1 pooka
55 1.1 pooka free(base);
56 1.1 pooka }
57 1.1 pooka
58 1.1 pooka #define ENTRYCHUNK 16
59 1.1 pooka static void
60 1.1 pooka allocdirs(struct psshfs_node *psn)
61 1.1 pooka {
62 1.1 pooka size_t oldtot = psn->denttot;
63 1.1 pooka
64 1.1 pooka psn->denttot += ENTRYCHUNK;
65 1.1 pooka psn->dir = erealloc(psn->dir,
66 1.1 pooka psn->denttot * sizeof(struct psshfs_dir));
67 1.1 pooka memset(psn->dir + oldtot, 0, ENTRYCHUNK * sizeof(struct psshfs_dir));
68 1.21 pooka
69 1.21 pooka #ifdef SUPERREADDIR
70 1.21 pooka psn->da = erealloc(psn->da, psn->denttot * sizeof(struct delayattr));
71 1.21 pooka #endif
72 1.1 pooka }
73 1.1 pooka
74 1.1 pooka struct psshfs_dir *
75 1.9 pooka lookup(struct psshfs_dir *bdir, size_t ndir, const char *name)
76 1.1 pooka {
77 1.9 pooka struct psshfs_dir *test;
78 1.1 pooka int i;
79 1.1 pooka
80 1.1 pooka for (i = 0; i < ndir; i++) {
81 1.9 pooka test = &bdir[i];
82 1.9 pooka if (test->valid != 1)
83 1.1 pooka continue;
84 1.9 pooka if (strcmp(test->entryname, name) == 0)
85 1.9 pooka return test;
86 1.9 pooka }
87 1.9 pooka
88 1.9 pooka return NULL;
89 1.9 pooka }
90 1.9 pooka
91 1.9 pooka static struct psshfs_dir *
92 1.9 pooka lookup_by_entry(struct psshfs_dir *bdir, size_t ndir, struct puffs_node *entry)
93 1.9 pooka {
94 1.9 pooka struct psshfs_dir *test;
95 1.9 pooka int i;
96 1.9 pooka
97 1.9 pooka for (i = 0; i < ndir; i++) {
98 1.9 pooka test = &bdir[i];
99 1.9 pooka if (test->valid != 1)
100 1.9 pooka continue;
101 1.9 pooka if (test->entry == entry)
102 1.9 pooka return test;
103 1.1 pooka }
104 1.1 pooka
105 1.1 pooka return NULL;
106 1.1 pooka }
107 1.1 pooka
108 1.8 pooka #ifdef SUPERREADDIR
109 1.8 pooka struct readdirattr {
110 1.8 pooka struct psshfs_node *psn;
111 1.8 pooka int idx;
112 1.8 pooka char entryname[MAXPATHLEN+1];
113 1.8 pooka };
114 1.8 pooka
115 1.8 pooka static void
116 1.14 pooka readdir_getattr_resp(struct puffs_usermount *pu,
117 1.18 pooka struct puffs_framebuf *pb, void *arg, int error)
118 1.8 pooka {
119 1.8 pooka struct readdirattr *rda = arg;
120 1.8 pooka struct psshfs_node *psn = rda->psn;
121 1.8 pooka struct psshfs_dir *pdir;
122 1.8 pooka struct vattr va;
123 1.8 pooka
124 1.18 pooka if (error)
125 1.18 pooka goto out;
126 1.18 pooka
127 1.8 pooka pdir = lookup(psn->dir, psn->denttot, rda->entryname);
128 1.8 pooka if (!pdir)
129 1.8 pooka goto out;
130 1.8 pooka
131 1.8 pooka if (psbuf_expect_attrs(pb, &va))
132 1.8 pooka goto out;
133 1.8 pooka
134 1.8 pooka if (pdir->entry) {
135 1.8 pooka struct psshfs_node *psn_targ;
136 1.8 pooka psn_targ = pdir->entry->pn_data;
137 1.8 pooka
138 1.8 pooka puffs_setvattr(&pdir->entry->pn_va, &va);
139 1.8 pooka psn_targ->attrread = time(NULL);
140 1.8 pooka } else {
141 1.8 pooka puffs_setvattr(&pdir->va, &va);
142 1.8 pooka pdir->attrread = time(NULL);
143 1.8 pooka }
144 1.8 pooka
145 1.8 pooka out:
146 1.8 pooka free(rda);
147 1.14 pooka puffs_framebuf_destroy(pb);
148 1.8 pooka }
149 1.8 pooka
150 1.21 pooka static void
151 1.14 pooka readdir_getattr(struct puffs_usermount *pu, struct psshfs_node *psn,
152 1.8 pooka const char *basepath, int idx)
153 1.8 pooka {
154 1.8 pooka char path[MAXPATHLEN+1];
155 1.14 pooka struct psshfs_ctx *pctx = puffs_getspecific(pu);
156 1.8 pooka struct psshfs_dir *pdir = psn->dir;
157 1.14 pooka struct puffs_framebuf *pb;
158 1.8 pooka struct readdirattr *rda;
159 1.8 pooka const char *entryname = pdir[idx].entryname;
160 1.8 pooka uint32_t reqid = NEXTREQ(pctx);
161 1.8 pooka
162 1.8 pooka rda = emalloc(sizeof(struct readdirattr));
163 1.8 pooka rda->psn = psn;
164 1.8 pooka rda->idx = idx;
165 1.8 pooka strlcpy(rda->entryname, entryname, sizeof(rda->entryname));
166 1.8 pooka
167 1.8 pooka strcpy(path, basepath);
168 1.8 pooka strcat(path, "/");
169 1.8 pooka strlcat(path, entryname, sizeof(path));
170 1.8 pooka
171 1.14 pooka pb = psbuf_makeout();
172 1.8 pooka psbuf_req_str(pb, SSH_FXP_LSTAT, reqid, path);
173 1.21 pooka psn->da[psn->nextda].pufbuf = pb;
174 1.21 pooka psn->da[psn->nextda].rda = rda;
175 1.21 pooka psn->nextda++;
176 1.21 pooka }
177 1.21 pooka
178 1.21 pooka static void
179 1.21 pooka readdir_getattr_send(struct puffs_usermount *pu, struct psshfs_node *psn)
180 1.21 pooka {
181 1.21 pooka struct psshfs_ctx *pctx = puffs_getspecific(pu);
182 1.21 pooka size_t i;
183 1.21 pooka int rv = 0;
184 1.21 pooka
185 1.21 pooka for (i = 0; i < psn->nextda; i++)
186 1.21 pooka SENDCB(psn->da[i].pufbuf, readdir_getattr_resp, psn->da[i].rda);
187 1.16 pooka
188 1.16 pooka out:
189 1.21 pooka return;
190 1.8 pooka }
191 1.8 pooka #endif
192 1.8 pooka
193 1.1 pooka int
194 1.12 pooka getpathattr(struct puffs_cc *pcc, const char *path, struct vattr *vap)
195 1.12 pooka {
196 1.12 pooka PSSHFSAUTOVAR(pcc);
197 1.12 pooka
198 1.12 pooka psbuf_req_str(pb, SSH_FXP_LSTAT, reqid, path);
199 1.15 pooka GETRESPONSE(pb);
200 1.12 pooka
201 1.12 pooka rv = psbuf_expect_attrs(pb, vap);
202 1.12 pooka
203 1.16 pooka out:
204 1.12 pooka PSSHFSRETURN(rv);
205 1.12 pooka }
206 1.12 pooka
207 1.12 pooka int
208 1.12 pooka getnodeattr(struct puffs_cc *pcc, struct puffs_node *pn)
209 1.12 pooka {
210 1.12 pooka struct puffs_usermount *pu = puffs_cc_getusermount(pcc);
211 1.12 pooka struct psshfs_node *psn = pn->pn_data;
212 1.12 pooka struct vattr va;
213 1.12 pooka int rv;
214 1.12 pooka
215 1.12 pooka if ((time(NULL) - psn->attrread) >= PSSHFS_REFRESHIVAL) {
216 1.12 pooka rv = getpathattr(pcc, PNPATH(pn), &va);
217 1.12 pooka if (rv)
218 1.12 pooka return rv;
219 1.12 pooka
220 1.12 pooka /*
221 1.12 pooka * Check if the file was modified from below us. If
222 1.12 pooka * so, invalidate page cache. This is the only sensible
223 1.12 pooka * place we can do this in.
224 1.12 pooka */
225 1.12 pooka if (psn->attrread)
226 1.12 pooka if (pn->pn_va.va_mtime.tv_sec != va.va_mtime.tv_sec)
227 1.12 pooka puffs_inval_pagecache_node(pu, pn);
228 1.12 pooka
229 1.12 pooka puffs_setvattr(&pn->pn_va, &va);
230 1.12 pooka psn->attrread = time(NULL);
231 1.12 pooka }
232 1.12 pooka
233 1.12 pooka return 0;
234 1.12 pooka }
235 1.12 pooka
236 1.12 pooka int
237 1.1 pooka sftp_readdir(struct puffs_cc *pcc, struct psshfs_ctx *pctx,
238 1.1 pooka struct puffs_node *pn)
239 1.1 pooka {
240 1.15 pooka struct puffs_usermount *pu = puffs_cc_getusermount(pcc);
241 1.1 pooka struct psshfs_node *psn = pn->pn_data;
242 1.1 pooka struct psshfs_dir *olddir, *testd;
243 1.14 pooka struct puffs_framebuf *pb;
244 1.1 pooka uint32_t reqid = NEXTREQ(pctx);
245 1.10 pooka uint32_t count, dhandlen;
246 1.1 pooka char *dhand = NULL;
247 1.10 pooka size_t nent;
248 1.1 pooka char *longname;
249 1.1 pooka int idx, rv;
250 1.1 pooka
251 1.1 pooka assert(pn->pn_va.va_type == VDIR);
252 1.16 pooka idx = 0;
253 1.16 pooka olddir = psn->dir;
254 1.16 pooka nent = psn->dentnext;
255 1.1 pooka
256 1.1 pooka if (psn->dir && (time(NULL) - psn->dentread) < PSSHFS_REFRESHIVAL)
257 1.1 pooka return 0;
258 1.1 pooka
259 1.5 pooka puffs_inval_namecache_dir(puffs_cc_getusermount(pcc), pn);
260 1.5 pooka
261 1.14 pooka pb = psbuf_makeout();
262 1.7 pooka psbuf_req_str(pb, SSH_FXP_OPENDIR, reqid, PNPATH(pn));
263 1.15 pooka GETRESPONSE(pb);
264 1.1 pooka
265 1.1 pooka rv = psbuf_expect_handle(pb, &dhand, &dhandlen);
266 1.1 pooka if (rv)
267 1.1 pooka goto wayout;
268 1.1 pooka
269 1.1 pooka /*
270 1.1 pooka * Well, the following is O(n^2), so feel free to improve if it
271 1.1 pooka * gets too taxing on your system.
272 1.1 pooka */
273 1.1 pooka
274 1.8 pooka /*
275 1.8 pooka * note: for the "getattr in batch" to work, this must be before
276 1.8 pooka * the attribute-getting. Otherwise times for first entries in
277 1.8 pooka * large directories might expire before the directory itself and
278 1.8 pooka * result in one-by-one attribute fetching.
279 1.8 pooka */
280 1.8 pooka psn->dentread = time(NULL);
281 1.8 pooka
282 1.1 pooka psn->dentnext = 0;
283 1.1 pooka psn->denttot = 0;
284 1.1 pooka psn->dir = NULL;
285 1.21 pooka #ifdef SUPERREADDIR
286 1.21 pooka psn->nextda = 0;
287 1.21 pooka #endif /* SUPERREADDIR */
288 1.1 pooka
289 1.1 pooka for (;;) {
290 1.1 pooka reqid = NEXTREQ(pctx);
291 1.14 pooka psbuf_recycleout(pb);
292 1.1 pooka psbuf_req_data(pb, SSH_FXP_READDIR, reqid, dhand, dhandlen);
293 1.15 pooka GETRESPONSE(pb);
294 1.1 pooka
295 1.1 pooka /* check for EOF */
296 1.14 pooka if (psbuf_get_type(pb) == SSH_FXP_STATUS) {
297 1.1 pooka rv = psbuf_expect_status(pb);
298 1.1 pooka goto out;
299 1.1 pooka }
300 1.1 pooka rv = psbuf_expect_name(pb, &count);
301 1.1 pooka if (rv)
302 1.1 pooka goto out;
303 1.1 pooka
304 1.1 pooka for (; count--; idx++) {
305 1.1 pooka if (idx == psn->denttot)
306 1.1 pooka allocdirs(psn);
307 1.14 pooka if ((rv = psbuf_get_str(pb,
308 1.14 pooka &psn->dir[idx].entryname, NULL)))
309 1.1 pooka goto out;
310 1.14 pooka if ((rv = psbuf_get_str(pb, &longname, NULL)))
311 1.1 pooka goto out;
312 1.17 pooka if ((rv = psbuf_get_vattr(pb, &psn->dir[idx].va))) {
313 1.17 pooka free(longname);
314 1.1 pooka goto out;
315 1.17 pooka }
316 1.1 pooka if (sscanf(longname, "%*s%d",
317 1.1 pooka &psn->dir[idx].va.va_nlink) != 1) {
318 1.1 pooka rv = EPROTO;
319 1.1 pooka goto out;
320 1.1 pooka }
321 1.1 pooka free(longname);
322 1.1 pooka
323 1.1 pooka testd = lookup(olddir, nent, psn->dir[idx].entryname);
324 1.1 pooka if (testd) {
325 1.1 pooka psn->dir[idx].entry = testd->entry;
326 1.8 pooka psn->dir[idx].va = testd->va;
327 1.1 pooka } else {
328 1.1 pooka psn->dir[idx].entry = NULL;
329 1.1 pooka psn->dir[idx].va.va_fileid = pctx->nextino++;
330 1.1 pooka }
331 1.8 pooka #ifdef SUPERREADDIR
332 1.8 pooka /*
333 1.8 pooka * XXX: there's a dangling pointer race here if
334 1.8 pooka * the server responds to our queries out-of-order.
335 1.8 pooka * fixxxme some day
336 1.8 pooka */
337 1.21 pooka readdir_getattr(puffs_cc_getusermount(pcc),
338 1.14 pooka psn, PNPATH(pn), idx);
339 1.8 pooka #endif
340 1.1 pooka psn->dir[idx].valid = 1;
341 1.1 pooka }
342 1.1 pooka }
343 1.1 pooka
344 1.1 pooka out:
345 1.21 pooka /* fire off getattr requests */
346 1.21 pooka readdir_getattr_send(pu, psn);
347 1.21 pooka
348 1.1 pooka /* XXX: rv */
349 1.1 pooka psn->dentnext = idx;
350 1.1 pooka freedircache(olddir, nent);
351 1.1 pooka
352 1.1 pooka reqid = NEXTREQ(pctx);
353 1.14 pooka psbuf_recycleout(pb);
354 1.1 pooka psbuf_req_data(pb, SSH_FXP_CLOSE, reqid, dhand, dhandlen);
355 1.15 pooka JUSTSEND(pb);
356 1.11 pooka free(dhand);
357 1.21 pooka
358 1.12 pooka return rv;
359 1.1 pooka
360 1.1 pooka wayout:
361 1.1 pooka free(dhand);
362 1.11 pooka PSSHFSRETURN(rv);
363 1.1 pooka }
364 1.1 pooka
365 1.1 pooka struct puffs_node *
366 1.1 pooka makenode(struct puffs_usermount *pu, struct puffs_node *parent,
367 1.1 pooka struct psshfs_dir *pd, const struct vattr *vap)
368 1.1 pooka {
369 1.1 pooka struct psshfs_node *psn_parent = parent->pn_data;
370 1.1 pooka struct psshfs_node *psn;
371 1.1 pooka struct puffs_node *pn;
372 1.1 pooka
373 1.1 pooka psn = emalloc(sizeof(struct psshfs_node));
374 1.1 pooka memset(psn, 0, sizeof(struct psshfs_node));
375 1.1 pooka
376 1.1 pooka pn = puffs_pn_new(pu, psn);
377 1.1 pooka if (!pn) {
378 1.1 pooka free(psn);
379 1.1 pooka return NULL;
380 1.1 pooka }
381 1.1 pooka puffs_setvattr(&pn->pn_va, &pd->va);
382 1.8 pooka psn->attrread = pd->attrread;
383 1.1 pooka puffs_setvattr(&pn->pn_va, vap);
384 1.1 pooka
385 1.1 pooka pd->entry = pn;
386 1.1 pooka psn->parent = parent;
387 1.1 pooka psn_parent->childcount++;
388 1.1 pooka
389 1.1 pooka return pn;
390 1.1 pooka }
391 1.1 pooka
392 1.1 pooka struct puffs_node *
393 1.1 pooka allocnode(struct puffs_usermount *pu, struct puffs_node *parent,
394 1.1 pooka const char *entryname, const struct vattr *vap)
395 1.1 pooka {
396 1.13 pooka struct psshfs_ctx *pctx = puffs_getspecific(pu);
397 1.1 pooka struct psshfs_dir *pd;
398 1.3 pooka struct puffs_node *pn;
399 1.1 pooka
400 1.1 pooka pd = direnter(parent, entryname);
401 1.1 pooka
402 1.1 pooka pd->va.va_fileid = pctx->nextino++;
403 1.2 pooka if (vap->va_type == VDIR) {
404 1.1 pooka pd->va.va_nlink = 2;
405 1.2 pooka parent->pn_va.va_nlink++;
406 1.2 pooka } else {
407 1.1 pooka pd->va.va_nlink = 1;
408 1.2 pooka }
409 1.1 pooka
410 1.3 pooka pn = makenode(pu, parent, pd, vap);
411 1.3 pooka if (pn)
412 1.3 pooka pd->va.va_fileid = pn->pn_va.va_fileid;
413 1.3 pooka
414 1.3 pooka return pn;
415 1.1 pooka }
416 1.1 pooka
417 1.1 pooka struct psshfs_dir *
418 1.1 pooka direnter(struct puffs_node *parent, const char *entryname)
419 1.1 pooka {
420 1.1 pooka struct psshfs_node *psn_parent = parent->pn_data;
421 1.1 pooka struct psshfs_dir *pd;
422 1.1 pooka int i;
423 1.1 pooka
424 1.1 pooka /* create directory entry */
425 1.1 pooka if (psn_parent->denttot == psn_parent->dentnext)
426 1.1 pooka allocdirs(psn_parent);
427 1.1 pooka
428 1.1 pooka i = psn_parent->dentnext;
429 1.1 pooka pd = &psn_parent->dir[i];
430 1.1 pooka pd->entryname = estrdup(entryname);
431 1.1 pooka pd->valid = 1;
432 1.8 pooka pd->attrread = 0;
433 1.4 pooka puffs_vattr_null(&pd->va);
434 1.1 pooka psn_parent->dentnext++;
435 1.1 pooka
436 1.1 pooka return pd;
437 1.1 pooka }
438 1.1 pooka
439 1.1 pooka void
440 1.9 pooka doreclaim(struct puffs_node *pn)
441 1.9 pooka {
442 1.9 pooka struct psshfs_node *psn = pn->pn_data;
443 1.9 pooka struct psshfs_node *psn_parent;
444 1.9 pooka struct psshfs_dir *dent;
445 1.9 pooka
446 1.9 pooka psn_parent = psn->parent->pn_data;
447 1.9 pooka psn_parent->childcount--;
448 1.9 pooka
449 1.11 pooka /*
450 1.11 pooka * Null out entry from directory. Do not treat a missing entry
451 1.11 pooka * as an invariant error, since the node might be removed from
452 1.11 pooka * under us, and we might do a readdir before the reclaim resulting
453 1.11 pooka * in no directory entry in the parent directory.
454 1.11 pooka */
455 1.9 pooka dent = lookup_by_entry(psn_parent->dir, psn_parent->dentnext, pn);
456 1.11 pooka if (dent)
457 1.11 pooka dent->entry = NULL;
458 1.9 pooka
459 1.21 pooka if (pn->pn_va.va_type == VDIR) {
460 1.9 pooka freedircache(psn->dir, psn->dentnext);
461 1.21 pooka #ifdef SUPERREADDIR
462 1.21 pooka free(psn->da);
463 1.21 pooka #endif
464 1.21 pooka }
465 1.9 pooka
466 1.9 pooka puffs_pn_put(pn);
467 1.9 pooka }
468 1.9 pooka
469 1.9 pooka void
470 1.9 pooka nukenode(struct puffs_node *node, const char *entryname, int reclaim)
471 1.1 pooka {
472 1.1 pooka struct psshfs_node *psn, *psn_parent;
473 1.1 pooka struct psshfs_dir *pd;
474 1.1 pooka
475 1.1 pooka psn = node->pn_data;
476 1.1 pooka psn_parent = psn->parent->pn_data;
477 1.1 pooka pd = lookup(psn_parent->dir, psn_parent->dentnext, entryname);
478 1.1 pooka assert(pd != NULL);
479 1.1 pooka pd->valid = 0;
480 1.1 pooka free(pd->entryname);
481 1.1 pooka pd->entryname = NULL;
482 1.1 pooka
483 1.9 pooka if (node->pn_va.va_type == VDIR)
484 1.1 pooka psn->parent->pn_va.va_nlink--;
485 1.6 pooka
486 1.9 pooka if (reclaim)
487 1.9 pooka doreclaim(node);
488 1.1 pooka }
489