puffs_node.c revision 1.16 1 1.16 hannken /* $NetBSD: puffs_node.c,v 1.16 2010/07/21 17:52:10 hannken Exp $ */
2 1.1 pooka
3 1.1 pooka /*
4 1.1 pooka * Copyright (c) 2005, 2006, 2007 Antti Kantee. All Rights Reserved.
5 1.1 pooka *
6 1.1 pooka * Development of this software was supported by the
7 1.1 pooka * Google Summer of Code program, the Ulla Tuominen Foundation
8 1.1 pooka * and the Finnish Cultural Foundation.
9 1.1 pooka *
10 1.1 pooka * Redistribution and use in source and binary forms, with or without
11 1.1 pooka * modification, are permitted provided that the following conditions
12 1.1 pooka * are met:
13 1.1 pooka * 1. Redistributions of source code must retain the above copyright
14 1.1 pooka * notice, this list of conditions and the following disclaimer.
15 1.1 pooka * 2. Redistributions in binary form must reproduce the above copyright
16 1.1 pooka * notice, this list of conditions and the following disclaimer in the
17 1.1 pooka * documentation and/or other materials provided with the distribution.
18 1.1 pooka *
19 1.1 pooka * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
20 1.1 pooka * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 1.1 pooka * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 1.1 pooka * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 1.1 pooka * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 1.1 pooka * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 1.1 pooka * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 1.1 pooka * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 1.1 pooka * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 1.1 pooka * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 1.1 pooka * SUCH DAMAGE.
30 1.1 pooka */
31 1.1 pooka
32 1.1 pooka #include <sys/cdefs.h>
33 1.16 hannken __KERNEL_RCSID(0, "$NetBSD: puffs_node.c,v 1.16 2010/07/21 17:52:10 hannken Exp $");
34 1.1 pooka
35 1.1 pooka #include <sys/param.h>
36 1.1 pooka #include <sys/hash.h>
37 1.1 pooka #include <sys/kmem.h>
38 1.1 pooka #include <sys/malloc.h>
39 1.1 pooka #include <sys/mount.h>
40 1.1 pooka #include <sys/namei.h>
41 1.1 pooka #include <sys/vnode.h>
42 1.1 pooka
43 1.1 pooka #include <fs/puffs/puffs_msgif.h>
44 1.1 pooka #include <fs/puffs/puffs_sys.h>
45 1.1 pooka
46 1.1 pooka #include <miscfs/genfs/genfs_node.h>
47 1.1 pooka #include <miscfs/specfs/specdev.h>
48 1.1 pooka
49 1.1 pooka static const struct genfs_ops puffs_genfsops = {
50 1.1 pooka .gop_size = puffs_gop_size,
51 1.1 pooka .gop_write = genfs_gop_write,
52 1.1 pooka .gop_markupdate = puffs_gop_markupdate,
53 1.1 pooka #if 0
54 1.1 pooka .gop_alloc, should ask userspace
55 1.1 pooka #endif
56 1.1 pooka };
57 1.1 pooka
58 1.1 pooka static __inline struct puffs_node_hashlist
59 1.11 pooka *puffs_cookie2hashlist(struct puffs_mount *, puffs_cookie_t);
60 1.11 pooka static struct puffs_node *puffs_cookie2pnode(struct puffs_mount *,
61 1.11 pooka puffs_cookie_t);
62 1.1 pooka
63 1.1 pooka struct pool puffs_pnpool;
64 1.1 pooka
65 1.1 pooka /*
66 1.1 pooka * Grab a vnode, intialize all the puffs-dependant stuff.
67 1.1 pooka */
68 1.1 pooka int
69 1.11 pooka puffs_getvnode(struct mount *mp, puffs_cookie_t ck, enum vtype type,
70 1.1 pooka voff_t vsize, dev_t rdev, struct vnode **vpp)
71 1.1 pooka {
72 1.1 pooka struct puffs_mount *pmp;
73 1.1 pooka struct puffs_newcookie *pnc;
74 1.10 ad struct vnode *vp;
75 1.1 pooka struct puffs_node *pnode;
76 1.1 pooka struct puffs_node_hashlist *plist;
77 1.1 pooka int error;
78 1.1 pooka
79 1.1 pooka pmp = MPTOPUFFSMP(mp);
80 1.1 pooka
81 1.1 pooka error = EPROTO;
82 1.3 pooka if (type <= VNON || type >= VBAD) {
83 1.7 pooka puffs_senderr(pmp, PUFFS_ERR_MAKENODE, EINVAL,
84 1.11 pooka "bad node type", ck);
85 1.3 pooka goto bad;
86 1.3 pooka }
87 1.3 pooka if (vsize == VSIZENOTSET) {
88 1.7 pooka puffs_senderr(pmp, PUFFS_ERR_MAKENODE, EINVAL,
89 1.11 pooka "VSIZENOTSET is not a valid size", ck);
90 1.1 pooka goto bad;
91 1.1 pooka }
92 1.1 pooka
93 1.13 ad error = getnewvnode(VT_PUFFS, mp, puffs_vnodeop_p, &vp);
94 1.1 pooka if (error)
95 1.1 pooka goto bad;
96 1.1 pooka vp->v_type = type;
97 1.1 pooka
98 1.1 pooka /*
99 1.4 pooka * Creation should not fail after this point. Or if it does,
100 1.4 pooka * care must be taken so that VOP_INACTIVE() isn't called.
101 1.4 pooka */
102 1.4 pooka
103 1.1 pooka /* default size */
104 1.1 pooka uvm_vnp_setsize(vp, 0);
105 1.1 pooka
106 1.1 pooka /* dances based on vnode type. almost ufs_vinit(), but not quite */
107 1.1 pooka switch (type) {
108 1.1 pooka case VCHR:
109 1.1 pooka case VBLK:
110 1.1 pooka /*
111 1.1 pooka * replace vnode operation vector with the specops vector.
112 1.1 pooka * our user server has very little control over the node
113 1.1 pooka * if it decides its a character or block special file
114 1.1 pooka */
115 1.1 pooka vp->v_op = puffs_specop_p;
116 1.10 ad spec_node_init(vp, rdev);
117 1.1 pooka break;
118 1.1 pooka
119 1.1 pooka case VFIFO:
120 1.1 pooka vp->v_op = puffs_fifoop_p;
121 1.1 pooka break;
122 1.1 pooka
123 1.1 pooka case VREG:
124 1.1 pooka uvm_vnp_setsize(vp, vsize);
125 1.1 pooka break;
126 1.1 pooka
127 1.1 pooka case VDIR:
128 1.1 pooka case VLNK:
129 1.1 pooka case VSOCK:
130 1.1 pooka break;
131 1.1 pooka default:
132 1.1 pooka panic("puffs_getvnode: invalid vtype %d", type);
133 1.1 pooka }
134 1.1 pooka
135 1.1 pooka pnode = pool_get(&puffs_pnpool, PR_WAITOK);
136 1.1 pooka memset(pnode, 0, sizeof(struct puffs_node));
137 1.1 pooka
138 1.11 pooka pnode->pn_cookie = ck;
139 1.1 pooka pnode->pn_refcount = 1;
140 1.1 pooka
141 1.1 pooka /* insert cookie on list, take off of interlock list */
142 1.1 pooka mutex_init(&pnode->pn_mtx, MUTEX_DEFAULT, IPL_NONE);
143 1.12 rmind selinit(&pnode->pn_sel);
144 1.11 pooka plist = puffs_cookie2hashlist(pmp, ck);
145 1.1 pooka mutex_enter(&pmp->pmp_lock);
146 1.1 pooka LIST_INSERT_HEAD(plist, pnode, pn_hashent);
147 1.11 pooka if (ck != pmp->pmp_root_cookie) {
148 1.1 pooka LIST_FOREACH(pnc, &pmp->pmp_newcookie, pnc_entries) {
149 1.11 pooka if (pnc->pnc_cookie == ck) {
150 1.1 pooka LIST_REMOVE(pnc, pnc_entries);
151 1.1 pooka kmem_free(pnc, sizeof(struct puffs_newcookie));
152 1.1 pooka break;
153 1.1 pooka }
154 1.1 pooka }
155 1.1 pooka KASSERT(pnc != NULL);
156 1.1 pooka }
157 1.1 pooka mutex_exit(&pmp->pmp_lock);
158 1.1 pooka
159 1.1 pooka vp->v_data = pnode;
160 1.1 pooka vp->v_type = type;
161 1.1 pooka pnode->pn_vp = vp;
162 1.1 pooka pnode->pn_serversize = vsize;
163 1.1 pooka
164 1.1 pooka genfs_node_init(vp, &puffs_genfsops);
165 1.1 pooka *vpp = vp;
166 1.1 pooka
167 1.1 pooka DPRINTF(("new vnode at %p, pnode %p, cookie %p\n", vp,
168 1.1 pooka pnode, pnode->pn_cookie));
169 1.1 pooka
170 1.1 pooka return 0;
171 1.1 pooka
172 1.1 pooka bad:
173 1.1 pooka /* remove staging cookie from list */
174 1.11 pooka if (ck != pmp->pmp_root_cookie) {
175 1.1 pooka mutex_enter(&pmp->pmp_lock);
176 1.1 pooka LIST_FOREACH(pnc, &pmp->pmp_newcookie, pnc_entries) {
177 1.11 pooka if (pnc->pnc_cookie == ck) {
178 1.1 pooka LIST_REMOVE(pnc, pnc_entries);
179 1.1 pooka kmem_free(pnc, sizeof(struct puffs_newcookie));
180 1.1 pooka break;
181 1.1 pooka }
182 1.1 pooka }
183 1.1 pooka KASSERT(pnc != NULL);
184 1.1 pooka mutex_exit(&pmp->pmp_lock);
185 1.1 pooka }
186 1.1 pooka
187 1.1 pooka return error;
188 1.1 pooka }
189 1.1 pooka
190 1.1 pooka /* new node creating for creative vop ops (create, symlink, mkdir, mknod) */
191 1.1 pooka int
192 1.1 pooka puffs_newnode(struct mount *mp, struct vnode *dvp, struct vnode **vpp,
193 1.11 pooka puffs_cookie_t ck, struct componentname *cnp,
194 1.11 pooka enum vtype type, dev_t rdev)
195 1.1 pooka {
196 1.1 pooka struct puffs_mount *pmp = MPTOPUFFSMP(mp);
197 1.1 pooka struct puffs_newcookie *pnc;
198 1.1 pooka struct vnode *vp;
199 1.1 pooka int error;
200 1.1 pooka
201 1.1 pooka /* userspace probably has this as a NULL op */
202 1.11 pooka if (ck == NULL) {
203 1.1 pooka error = EOPNOTSUPP;
204 1.1 pooka return error;
205 1.1 pooka }
206 1.1 pooka
207 1.1 pooka /*
208 1.1 pooka * Check for previous node with the same designation.
209 1.1 pooka * Explicitly check the root node cookie, since it might be
210 1.1 pooka * reclaimed from the kernel when this check is made.
211 1.1 pooka */
212 1.1 pooka mutex_enter(&pmp->pmp_lock);
213 1.11 pooka if (ck == pmp->pmp_root_cookie
214 1.11 pooka || puffs_cookie2pnode(pmp, ck) != NULL) {
215 1.1 pooka mutex_exit(&pmp->pmp_lock);
216 1.7 pooka puffs_senderr(pmp, PUFFS_ERR_MAKENODE, EEXIST,
217 1.11 pooka "cookie exists", ck);
218 1.1 pooka return EPROTO;
219 1.1 pooka }
220 1.1 pooka
221 1.1 pooka LIST_FOREACH(pnc, &pmp->pmp_newcookie, pnc_entries) {
222 1.11 pooka if (pnc->pnc_cookie == ck) {
223 1.1 pooka mutex_exit(&pmp->pmp_lock);
224 1.7 pooka puffs_senderr(pmp, PUFFS_ERR_MAKENODE, EEXIST,
225 1.14 pooka "newcookie exists", ck);
226 1.1 pooka return EPROTO;
227 1.1 pooka }
228 1.1 pooka }
229 1.1 pooka pnc = kmem_alloc(sizeof(struct puffs_newcookie), KM_SLEEP);
230 1.11 pooka pnc->pnc_cookie = ck;
231 1.1 pooka LIST_INSERT_HEAD(&pmp->pmp_newcookie, pnc, pnc_entries);
232 1.1 pooka mutex_exit(&pmp->pmp_lock);
233 1.1 pooka
234 1.11 pooka error = puffs_getvnode(dvp->v_mount, ck, type, 0, rdev, &vp);
235 1.1 pooka if (error)
236 1.1 pooka return error;
237 1.1 pooka
238 1.1 pooka vp->v_type = type;
239 1.1 pooka vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
240 1.1 pooka *vpp = vp;
241 1.1 pooka
242 1.1 pooka if ((cnp->cn_flags & MAKEENTRY) && PUFFS_USE_NAMECACHE(pmp))
243 1.1 pooka cache_enter(dvp, vp, cnp);
244 1.1 pooka
245 1.1 pooka return 0;
246 1.1 pooka }
247 1.1 pooka
248 1.1 pooka void
249 1.1 pooka puffs_putvnode(struct vnode *vp)
250 1.1 pooka {
251 1.1 pooka struct puffs_mount *pmp;
252 1.1 pooka struct puffs_node *pnode;
253 1.1 pooka
254 1.1 pooka pmp = VPTOPUFFSMP(vp);
255 1.1 pooka pnode = VPTOPP(vp);
256 1.1 pooka
257 1.1 pooka #ifdef DIAGNOSTIC
258 1.1 pooka if (vp->v_tag != VT_PUFFS)
259 1.1 pooka panic("puffs_putvnode: %p not a puffs vnode", vp);
260 1.1 pooka #endif
261 1.1 pooka
262 1.1 pooka genfs_node_destroy(vp);
263 1.1 pooka puffs_releasenode(pnode);
264 1.1 pooka vp->v_data = NULL;
265 1.1 pooka
266 1.1 pooka return;
267 1.1 pooka }
268 1.1 pooka
269 1.1 pooka static __inline struct puffs_node_hashlist *
270 1.11 pooka puffs_cookie2hashlist(struct puffs_mount *pmp, puffs_cookie_t ck)
271 1.1 pooka {
272 1.1 pooka uint32_t hash;
273 1.1 pooka
274 1.11 pooka hash = hash32_buf(&ck, sizeof(void *), HASH32_BUF_INIT);
275 1.1 pooka return &pmp->pmp_pnodehash[hash % pmp->pmp_npnodehash];
276 1.1 pooka }
277 1.1 pooka
278 1.1 pooka /*
279 1.2 pooka * Translate cookie to puffs_node. Caller must hold pmp_lock
280 1.2 pooka * and it will be held upon return.
281 1.1 pooka */
282 1.1 pooka static struct puffs_node *
283 1.11 pooka puffs_cookie2pnode(struct puffs_mount *pmp, puffs_cookie_t ck)
284 1.1 pooka {
285 1.1 pooka struct puffs_node_hashlist *plist;
286 1.1 pooka struct puffs_node *pnode;
287 1.1 pooka
288 1.11 pooka plist = puffs_cookie2hashlist(pmp, ck);
289 1.1 pooka LIST_FOREACH(pnode, plist, pn_hashent) {
290 1.11 pooka if (pnode->pn_cookie == ck)
291 1.1 pooka break;
292 1.1 pooka }
293 1.1 pooka
294 1.1 pooka return pnode;
295 1.1 pooka }
296 1.1 pooka
297 1.1 pooka /*
298 1.1 pooka * Make sure root vnode exists and reference it. Does NOT lock.
299 1.1 pooka */
300 1.1 pooka static int
301 1.1 pooka puffs_makeroot(struct puffs_mount *pmp)
302 1.1 pooka {
303 1.1 pooka struct vnode *vp;
304 1.1 pooka int rv;
305 1.1 pooka
306 1.1 pooka /*
307 1.1 pooka * pmp_lock must be held if vref()'ing or vrele()'ing the
308 1.1 pooka * root vnode. the latter is controlled by puffs_inactive().
309 1.1 pooka *
310 1.1 pooka * pmp_root is set here and cleared in puffs_reclaim().
311 1.1 pooka */
312 1.1 pooka retry:
313 1.1 pooka mutex_enter(&pmp->pmp_lock);
314 1.1 pooka vp = pmp->pmp_root;
315 1.1 pooka if (vp) {
316 1.9 ad mutex_enter(&vp->v_interlock);
317 1.1 pooka mutex_exit(&pmp->pmp_lock);
318 1.16 hannken if (vget(vp, 0) == 0)
319 1.1 pooka return 0;
320 1.1 pooka } else
321 1.1 pooka mutex_exit(&pmp->pmp_lock);
322 1.1 pooka
323 1.1 pooka /*
324 1.1 pooka * So, didn't have the magic root vnode available.
325 1.1 pooka * No matter, grab another and stuff it with the cookie.
326 1.1 pooka */
327 1.1 pooka if ((rv = puffs_getvnode(pmp->pmp_mp, pmp->pmp_root_cookie,
328 1.1 pooka pmp->pmp_root_vtype, pmp->pmp_root_vsize, pmp->pmp_root_rdev, &vp)))
329 1.1 pooka return rv;
330 1.1 pooka
331 1.1 pooka /*
332 1.1 pooka * Someone magically managed to race us into puffs_getvnode?
333 1.1 pooka * Put our previous new vnode back and retry.
334 1.1 pooka */
335 1.1 pooka mutex_enter(&pmp->pmp_lock);
336 1.1 pooka if (pmp->pmp_root) {
337 1.14 pooka struct puffs_node *pnode = vp->v_data;
338 1.14 pooka
339 1.14 pooka LIST_REMOVE(pnode, pn_hashent);
340 1.1 pooka mutex_exit(&pmp->pmp_lock);
341 1.1 pooka puffs_putvnode(vp);
342 1.1 pooka goto retry;
343 1.1 pooka }
344 1.1 pooka
345 1.1 pooka /* store cache */
346 1.5 ad vp->v_vflag |= VV_ROOT;
347 1.1 pooka pmp->pmp_root = vp;
348 1.1 pooka mutex_exit(&pmp->pmp_lock);
349 1.1 pooka
350 1.1 pooka return 0;
351 1.1 pooka }
352 1.1 pooka
353 1.1 pooka /*
354 1.1 pooka * Locate the in-kernel vnode based on the cookie received given
355 1.1 pooka * from userspace. Returns a vnode, if found, NULL otherwise.
356 1.1 pooka * The parameter "lock" control whether to lock the possible or
357 1.1 pooka * not. Locking always might cause us to lock against ourselves
358 1.1 pooka * in situations where we want the vnode but don't care for the
359 1.1 pooka * vnode lock, e.g. file server issued putpages.
360 1.1 pooka */
361 1.1 pooka int
362 1.11 pooka puffs_cookie2vnode(struct puffs_mount *pmp, puffs_cookie_t ck, int lock,
363 1.1 pooka int willcreate, struct vnode **vpp)
364 1.1 pooka {
365 1.1 pooka struct puffs_node *pnode;
366 1.1 pooka struct puffs_newcookie *pnc;
367 1.1 pooka struct vnode *vp;
368 1.1 pooka int vgetflags, rv;
369 1.1 pooka
370 1.1 pooka /*
371 1.1 pooka * Handle root in a special manner, since we want to make sure
372 1.1 pooka * pmp_root is properly set.
373 1.1 pooka */
374 1.11 pooka if (ck == pmp->pmp_root_cookie) {
375 1.1 pooka if ((rv = puffs_makeroot(pmp)))
376 1.1 pooka return rv;
377 1.1 pooka if (lock)
378 1.1 pooka vn_lock(pmp->pmp_root, LK_EXCLUSIVE | LK_RETRY);
379 1.1 pooka
380 1.1 pooka *vpp = pmp->pmp_root;
381 1.1 pooka return 0;
382 1.1 pooka }
383 1.1 pooka
384 1.1 pooka mutex_enter(&pmp->pmp_lock);
385 1.11 pooka pnode = puffs_cookie2pnode(pmp, ck);
386 1.1 pooka if (pnode == NULL) {
387 1.1 pooka if (willcreate) {
388 1.1 pooka pnc = kmem_alloc(sizeof(struct puffs_newcookie),
389 1.1 pooka KM_SLEEP);
390 1.11 pooka pnc->pnc_cookie = ck;
391 1.1 pooka LIST_INSERT_HEAD(&pmp->pmp_newcookie, pnc, pnc_entries);
392 1.1 pooka }
393 1.1 pooka mutex_exit(&pmp->pmp_lock);
394 1.1 pooka return PUFFS_NOSUCHCOOKIE;
395 1.1 pooka }
396 1.1 pooka vp = pnode->pn_vp;
397 1.9 ad mutex_enter(&vp->v_interlock);
398 1.1 pooka mutex_exit(&pmp->pmp_lock);
399 1.1 pooka
400 1.16 hannken vgetflags = 0;
401 1.1 pooka if (lock)
402 1.1 pooka vgetflags |= LK_EXCLUSIVE | LK_RETRY;
403 1.1 pooka if ((rv = vget(vp, vgetflags)))
404 1.1 pooka return rv;
405 1.1 pooka
406 1.1 pooka *vpp = vp;
407 1.1 pooka return 0;
408 1.1 pooka }
409 1.1 pooka
410 1.1 pooka void
411 1.8 pooka puffs_updatenode(struct puffs_node *pn, int flags, voff_t size)
412 1.1 pooka {
413 1.1 pooka struct timespec ts;
414 1.1 pooka
415 1.1 pooka if (flags == 0)
416 1.1 pooka return;
417 1.1 pooka
418 1.1 pooka nanotime(&ts);
419 1.1 pooka
420 1.1 pooka if (flags & PUFFS_UPDATEATIME) {
421 1.1 pooka pn->pn_mc_atime = ts;
422 1.1 pooka pn->pn_stat |= PNODE_METACACHE_ATIME;
423 1.1 pooka }
424 1.1 pooka if (flags & PUFFS_UPDATECTIME) {
425 1.1 pooka pn->pn_mc_ctime = ts;
426 1.1 pooka pn->pn_stat |= PNODE_METACACHE_CTIME;
427 1.1 pooka }
428 1.1 pooka if (flags & PUFFS_UPDATEMTIME) {
429 1.1 pooka pn->pn_mc_mtime = ts;
430 1.1 pooka pn->pn_stat |= PNODE_METACACHE_MTIME;
431 1.1 pooka }
432 1.1 pooka if (flags & PUFFS_UPDATESIZE) {
433 1.8 pooka pn->pn_mc_size = size;
434 1.1 pooka pn->pn_stat |= PNODE_METACACHE_SIZE;
435 1.1 pooka }
436 1.1 pooka }
437 1.1 pooka
438 1.1 pooka /*
439 1.1 pooka * Add reference to node.
440 1.1 pooka * mutex held on entry and return
441 1.1 pooka */
442 1.1 pooka void
443 1.1 pooka puffs_referencenode(struct puffs_node *pn)
444 1.1 pooka {
445 1.1 pooka
446 1.1 pooka KASSERT(mutex_owned(&pn->pn_mtx));
447 1.1 pooka pn->pn_refcount++;
448 1.1 pooka }
449 1.1 pooka
450 1.1 pooka /*
451 1.1 pooka * Release pnode structure which dealing with references to the
452 1.1 pooka * puffs_node instead of the vnode. Can't use vref()/vrele() on
453 1.1 pooka * the vnode there, since that causes the lovely VOP_INACTIVE(),
454 1.1 pooka * which in turn causes the lovely deadlock when called by the one
455 1.1 pooka * who is supposed to handle it.
456 1.1 pooka */
457 1.1 pooka void
458 1.1 pooka puffs_releasenode(struct puffs_node *pn)
459 1.1 pooka {
460 1.1 pooka
461 1.1 pooka mutex_enter(&pn->pn_mtx);
462 1.1 pooka if (--pn->pn_refcount == 0) {
463 1.1 pooka mutex_exit(&pn->pn_mtx);
464 1.1 pooka mutex_destroy(&pn->pn_mtx);
465 1.12 rmind seldestroy(&pn->pn_sel);
466 1.1 pooka pool_put(&puffs_pnpool, pn);
467 1.1 pooka } else {
468 1.1 pooka mutex_exit(&pn->pn_mtx);
469 1.1 pooka }
470 1.1 pooka }
471