Annotation of src/sys/fs/puffs/puffs_subr.c, Revision 1.45
1.45 ! pooka 1: /* $NetBSD: puffs_subr.c,v 1.44 2007/08/01 14:20:45 pooka Exp $ */
1.1 pooka 2:
3: /*
4: * Copyright (c) 2005, 2006 Antti Kantee. All Rights Reserved.
5: *
6: * Development of this software was supported by the
7: * Google Summer of Code program and the Ulla Tuominen Foundation.
8: * The Google SoC project was mentored by Bill Studenmund.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
20: * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21: * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22: * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25: * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29: * SUCH DAMAGE.
30: */
31:
32: #include <sys/cdefs.h>
1.45 ! pooka 33: __KERNEL_RCSID(0, "$NetBSD: puffs_subr.c,v 1.44 2007/08/01 14:20:45 pooka Exp $");
1.1 pooka 34:
35: #include <sys/param.h>
36: #include <sys/conf.h>
1.16 pooka 37: #include <sys/hash.h>
1.31 pooka 38: #include <sys/kauth.h>
1.1 pooka 39: #include <sys/malloc.h>
40: #include <sys/mount.h>
1.31 pooka 41: #include <sys/namei.h>
42: #include <sys/poll.h>
1.1 pooka 43: #include <sys/socketvar.h>
44: #include <sys/vnode.h>
1.40 ad 45: #include <sys/proc.h>
1.1 pooka 46:
47: #include <fs/puffs/puffs_msgif.h>
48: #include <fs/puffs/puffs_sys.h>
49:
1.7 pooka 50: #include <miscfs/genfs/genfs_node.h>
1.4 pooka 51: #include <miscfs/specfs/specdev.h>
52:
1.26 pooka 53: struct pool puffs_pnpool;
1.1 pooka 54:
1.19 pooka 55: #ifdef PUFFSDEBUG
1.10 pooka 56: int puffsdebug;
57: #endif
58:
1.16 pooka 59: static __inline struct puffs_node_hashlist
60: *puffs_cookie2hashlist(struct puffs_mount *, void *);
61: static struct puffs_node *puffs_cookie2pnode(struct puffs_mount *, void *);
1.7 pooka 62:
63: static void puffs_gop_size(struct vnode *, off_t, off_t *, int);
64: static void puffs_gop_markupdate(struct vnode *, int);
65:
66: static const struct genfs_ops puffs_genfsops = {
67: .gop_size = puffs_gop_size,
68: .gop_write = genfs_gop_write,
69: .gop_markupdate = puffs_gop_markupdate,
70: #if 0
71: .gop_alloc, should ask userspace
72: #endif
73: };
74:
1.1 pooka 75: /*
76: * Grab a vnode, intialize all the puffs-dependant stuff.
77: */
78: int
1.4 pooka 79: puffs_getvnode(struct mount *mp, void *cookie, enum vtype type,
1.7 pooka 80: voff_t vsize, dev_t rdev, struct vnode **vpp)
1.1 pooka 81: {
82: struct puffs_mount *pmp;
1.4 pooka 83: struct vnode *vp, *nvp;
1.1 pooka 84: struct puffs_node *pnode;
1.16 pooka 85: struct puffs_node_hashlist *plist;
1.1 pooka 86: int error;
87:
1.39 pooka 88: if (type <= VNON || type >= VBAD)
89: return EINVAL;
1.45 ! pooka 90: if (vsize == VSIZENOTSET)
! 91: return EINVAL;
1.39 pooka 92:
1.1 pooka 93: pmp = MPTOPUFFSMP(mp);
94:
1.2 pooka 95: /*
96: * XXX: there is a deadlock condition between vfs_busy() and
97: * vnode locks. For an unmounting file system the mountpoint
98: * is frozen, but in unmount(FORCE) vflush() wants to access all
99: * of the vnodes. If we are here waiting for the mountpoint
100: * lock while holding on to a vnode lock, well, we ain't
101: * just pining for the fjords anymore. If we release the
102: * vnode lock, we will be in the situation "mount point
103: * is dying" and panic() will ensue in insmntque. So as a
104: * temporary workaround, get a vnode without putting it on
105: * the mount point list, check if mount point is still alive
106: * and kicking and only then add the vnode to the list.
107: */
108: error = getnewvnode(VT_PUFFS, NULL, puffs_vnodeop_p, &vp);
109: if (error)
1.1 pooka 110: return error;
1.2 pooka 111: vp->v_vnlock = NULL;
1.4 pooka 112: vp->v_type = type;
1.2 pooka 113:
114: /*
115: * Check what mount point isn't going away. This will work
116: * until we decide to remove biglock or make the kernel
117: * preemptive. But hopefully the real problem will be fixed
118: * by then.
119: *
120: * XXX: yes, should call vfs_busy(), but thar be rabbits with
121: * vicious streaks a mile wide ...
122: */
123: if (mp->mnt_iflag & IMNT_UNMOUNT) {
124: DPRINTF(("puffs_getvnode: mp %p unmount, unable to create "
125: "vnode for cookie %p\n", mp, cookie));
126: ungetnewvnode(vp);
127: return ENXIO;
1.1 pooka 128: }
129:
1.2 pooka 130: /* So it's not dead yet.. good.. inform new vnode of its master */
131: simple_lock(&mntvnode_slock);
1.16 pooka 132: TAILQ_INSERT_TAIL(&mp->mnt_vnodelist, vp, v_mntvnodes);
1.2 pooka 133: simple_unlock(&mntvnode_slock);
134: vp->v_mount = mp;
135:
1.4 pooka 136: /*
137: * clerical tasks & footwork
138: */
139:
1.29 pooka 140: /* default size */
141: uvm_vnp_setsize(vp, 0);
142:
1.4 pooka 143: /* dances based on vnode type. almost ufs_vinit(), but not quite */
144: switch (type) {
145: case VCHR:
146: case VBLK:
147: /*
148: * replace vnode operation vector with the specops vector.
149: * our user server has very little control over the node
150: * if it decides its a character or block special file
151: */
152: vp->v_op = puffs_specop_p;
153:
154: /* do the standard checkalias-dance */
155: if ((nvp = checkalias(vp, rdev, mp)) != NULL) {
156: /*
1.6 pooka 157: * found: release & unallocate aliased
1.4 pooka 158: * old (well, actually, new) node
159: */
160: vp->v_op = spec_vnodeop_p;
161: vp->v_flag &= ~VLOCKSWORK;
162: vrele(vp);
163: vgone(vp); /* cya */
164:
165: /* init "new" vnode */
166: vp = nvp;
167: vp->v_vnlock = NULL;
168: vp->v_mount = mp;
169: }
170: break;
1.7 pooka 171:
1.5 pooka 172: case VFIFO:
173: vp->v_op = puffs_fifoop_p;
174: break;
1.7 pooka 175:
176: case VREG:
177: uvm_vnp_setsize(vp, vsize);
178: break;
179:
1.5 pooka 180: case VDIR:
181: case VLNK:
182: case VSOCK:
183: break;
1.4 pooka 184: default:
1.5 pooka 185: #ifdef DIAGNOSTIC
186: panic("puffs_getvnode: invalid vtype %d", type);
187: #endif
1.4 pooka 188: break;
189: }
190:
1.2 pooka 191: pnode = pool_get(&puffs_pnpool, PR_WAITOK);
1.41 pooka 192: memset(pnode, 0, sizeof(struct puffs_node));
193:
1.1 pooka 194: pnode->pn_cookie = cookie;
1.31 pooka 195: pnode->pn_refcount = 1;
196:
197: mutex_init(&pnode->pn_mtx, MUTEX_DEFAULT, IPL_NONE);
198: SLIST_INIT(&pnode->pn_sel.sel_klist);
199:
1.16 pooka 200: plist = puffs_cookie2hashlist(pmp, cookie);
201: LIST_INSERT_HEAD(plist, pnode, pn_hashent);
1.1 pooka 202: vp->v_data = pnode;
1.4 pooka 203: vp->v_type = type;
1.1 pooka 204: pnode->pn_vp = vp;
1.42 pooka 205: pnode->pn_serversize = vsize;
1.1 pooka 206:
1.7 pooka 207: genfs_node_init(vp, &puffs_genfsops);
1.1 pooka 208: *vpp = vp;
209:
210: DPRINTF(("new vnode at %p, pnode %p, cookie %p\n", vp,
211: pnode, pnode->pn_cookie));
212:
213: return 0;
214: }
215:
216: /* new node creating for creative vop ops (create, symlink, mkdir, mknod) */
217: int
218: puffs_newnode(struct mount *mp, struct vnode *dvp, struct vnode **vpp,
1.4 pooka 219: void *cookie, struct componentname *cnp, enum vtype type, dev_t rdev)
1.1 pooka 220: {
1.13 pooka 221: struct puffs_mount *pmp = MPTOPUFFSMP(mp);
1.1 pooka 222: struct vnode *vp;
223: int error;
224:
225: /* userspace probably has this as a NULL op */
226: if (cookie == NULL) {
227: error = EOPNOTSUPP;
1.3 pooka 228: return error;
1.1 pooka 229: }
230:
1.15 pooka 231: /*
232: * Check for previous node with the same designation.
1.20 pooka 233: * Explicitly check the root node cookie, since it might be
234: * reclaimed from the kernel when this check is made.
1.15 pooka 235: *
236: * XXX: technically this error check should punish the fs,
237: * not the caller.
238: */
1.26 pooka 239: mutex_enter(&pmp->pmp_lock);
1.30 pooka 240: if (cookie == pmp->pmp_root_cookie
1.20 pooka 241: || puffs_cookie2pnode(pmp, cookie) != NULL) {
1.26 pooka 242: mutex_exit(&pmp->pmp_lock);
1.15 pooka 243: error = EEXIST;
244: return error;
245: }
1.26 pooka 246: mutex_exit(&pmp->pmp_lock);
1.15 pooka 247:
1.7 pooka 248: error = puffs_getvnode(dvp->v_mount, cookie, type, 0, rdev, &vp);
1.1 pooka 249: if (error)
1.3 pooka 250: return error;
1.1 pooka 251:
252: vp->v_type = type;
253: vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
254: *vpp = vp;
255:
1.35 pooka 256: if ((cnp->cn_flags & MAKEENTRY) && PUFFS_USE_NAMECACHE(pmp))
1.13 pooka 257: cache_enter(dvp, vp, cnp);
258:
1.3 pooka 259: return 0;
1.1 pooka 260: }
261:
1.31 pooka 262: /*
263: * Release pnode structure which dealing with references to the
264: * puffs_node instead of the vnode. Can't use vref()/vrele() on
265: * the vnode there, since that causes the lovely VOP_INACTIVE(),
266: * which in turn causes the lovely deadlock when called by the one
267: * who is supposed to handle it.
268: */
269: void
270: puffs_releasenode(struct puffs_node *pn)
271: {
272:
273: mutex_enter(&pn->pn_mtx);
274: if (--pn->pn_refcount == 0) {
275: mutex_exit(&pn->pn_mtx);
276: mutex_destroy(&pn->pn_mtx);
277: pool_put(&puffs_pnpool, pn);
278: } else {
279: mutex_exit(&pn->pn_mtx);
280: }
281: }
282:
283: /*
284: * Add reference to node.
285: * mutex held on entry and return
286: */
287: void
288: puffs_referencenode(struct puffs_node *pn)
289: {
290:
291: KASSERT(mutex_owned(&pn->pn_mtx));
292: pn->pn_refcount++;
293: }
294:
1.1 pooka 295: void
296: puffs_putvnode(struct vnode *vp)
297: {
298: struct puffs_mount *pmp;
299: struct puffs_node *pnode;
300:
301: pmp = VPTOPUFFSMP(vp);
302: pnode = VPTOPP(vp);
303:
304: #ifdef DIAGNOSTIC
305: if (vp->v_tag != VT_PUFFS)
306: panic("puffs_putvnode: %p not a puffs vnode", vp);
307: #endif
308:
1.16 pooka 309: LIST_REMOVE(pnode, pn_hashent);
1.21 ad 310: genfs_node_destroy(vp);
1.31 pooka 311: puffs_releasenode(pnode);
1.1 pooka 312: vp->v_data = NULL;
313:
314: return;
315: }
316:
1.16 pooka 317: static __inline struct puffs_node_hashlist *
318: puffs_cookie2hashlist(struct puffs_mount *pmp, void *cookie)
319: {
320: uint32_t hash;
321:
322: hash = hash32_buf(&cookie, sizeof(void *), HASH32_BUF_INIT);
323: return &pmp->pmp_pnodehash[hash % pmp->pmp_npnodehash];
324: }
325:
1.1 pooka 326: /*
1.15 pooka 327: * Translate cookie to puffs_node. Caller must hold mountpoint
328: * lock and it will be held upon return.
329: */
1.16 pooka 330: static struct puffs_node *
1.15 pooka 331: puffs_cookie2pnode(struct puffs_mount *pmp, void *cookie)
332: {
1.16 pooka 333: struct puffs_node_hashlist *plist;
1.15 pooka 334: struct puffs_node *pnode;
335:
1.16 pooka 336: plist = puffs_cookie2hashlist(pmp, cookie);
337: LIST_FOREACH(pnode, plist, pn_hashent) {
1.15 pooka 338: if (pnode->pn_cookie == cookie)
339: break;
340: }
341:
342: return pnode;
343: }
344:
345: /*
1.33 pooka 346: * Make sure root vnode exists and reference it. Does NOT lock.
347: */
1.34 pooka 348: static int
1.33 pooka 349: puffs_makeroot(struct puffs_mount *pmp)
350: {
351: struct vnode *vp;
352: int rv;
353:
354: /*
355: * pmp_lock must be held if vref()'ing or vrele()'ing the
356: * root vnode. the latter is controlled by puffs_inactive().
357: *
358: * pmp_root is set here and cleared in puffs_reclaim().
359: */
360: retry:
361: mutex_enter(&pmp->pmp_lock);
362: vp = pmp->pmp_root;
363: if (vp) {
364: simple_lock(&vp->v_interlock);
365: mutex_exit(&pmp->pmp_lock);
366: if (vget(vp, LK_INTERLOCK) == 0)
367: return 0;
368: } else
369: mutex_exit(&pmp->pmp_lock);
370:
371: /*
372: * So, didn't have the magic root vnode available.
373: * No matter, grab another an stuff it with the cookie.
374: */
375: if ((rv = puffs_getvnode(pmp->pmp_mp, pmp->pmp_root_cookie,
376: pmp->pmp_root_vtype, pmp->pmp_root_vsize, pmp->pmp_root_rdev, &vp)))
377: return rv;
378:
379: /*
380: * Someone magically managed to race us into puffs_getvnode?
381: * Put our previous new vnode back and retry.
382: */
383: mutex_enter(&pmp->pmp_lock);
384: if (pmp->pmp_root) {
385: mutex_exit(&pmp->pmp_lock);
386: puffs_putvnode(vp);
387: goto retry;
388: }
389:
390: /* store cache */
391: vp->v_flag = VROOT;
392: pmp->pmp_root = vp;
393: mutex_exit(&pmp->pmp_lock);
394:
395: return 0;
396: }
397:
398: /*
1.1 pooka 399: * Locate the in-kernel vnode based on the cookie received given
1.20 pooka 400: * from userspace. Returns a vnode, if found, NULL otherwise.
401: * The parameter "lock" control whether to lock the possible or
402: * not. Locking always might cause us to lock against ourselves
403: * in situations where we want the vnode but don't care for the
404: * vnode lock, e.g. file server issued putpages.
1.1 pooka 405: */
1.34 pooka 406: int
407: puffs_pnode2vnode(struct puffs_mount *pmp, void *cookie, int lock,
408: struct vnode **vpp)
1.1 pooka 409: {
410: struct puffs_node *pnode;
411: struct vnode *vp;
1.34 pooka 412: int vgetflags, rv;
1.1 pooka 413:
1.20 pooka 414: /*
1.33 pooka 415: * Handle root in a special manner, since we want to make sure
416: * pmp_root is properly set.
1.20 pooka 417: */
1.30 pooka 418: if (cookie == pmp->pmp_root_cookie) {
1.34 pooka 419: if ((rv = puffs_makeroot(pmp)))
420: return rv;
1.33 pooka 421: if (lock)
422: vn_lock(pmp->pmp_root, LK_EXCLUSIVE | LK_RETRY);
1.20 pooka 423:
1.34 pooka 424: *vpp = pmp->pmp_root;
425: return 0;
1.20 pooka 426: }
427:
1.26 pooka 428: mutex_enter(&pmp->pmp_lock);
1.15 pooka 429: pnode = puffs_cookie2pnode(pmp, cookie);
1.14 pooka 430:
1.15 pooka 431: if (pnode == NULL) {
1.26 pooka 432: mutex_exit(&pmp->pmp_lock);
1.34 pooka 433: return ENOENT;
1.15 pooka 434: }
1.34 pooka 435:
1.1 pooka 436: vp = pnode->pn_vp;
1.17 pooka 437: simple_lock(&vp->v_interlock);
1.26 pooka 438: mutex_exit(&pmp->pmp_lock);
1.1 pooka 439:
1.34 pooka 440: vgetflags = LK_INTERLOCK;
441: if (lock)
442: vgetflags |= LK_EXCLUSIVE | LK_RETRY;
443: if ((rv = vget(vp, vgetflags)))
444: return rv;
1.14 pooka 445:
1.34 pooka 446: *vpp = vp;
447: return 0;
1.1 pooka 448: }
449:
450: void
1.36 pooka 451: puffs_makecn(struct puffs_kcn *pkcn, struct puffs_kcred *pkcr,
1.38 pooka 452: struct puffs_kcid *pkcid, const struct componentname *cn, int full)
1.1 pooka 453: {
454:
1.12 pooka 455: pkcn->pkcn_nameiop = cn->cn_nameiop;
456: pkcn->pkcn_flags = cn->cn_flags;
1.37 pooka 457: puffs_cidcvt(pkcid, cn->cn_lwp);
1.1 pooka 458:
1.38 pooka 459: if (full) {
460: (void)strcpy(pkcn->pkcn_name, cn->cn_nameptr);
461: } else {
462: (void)memcpy(pkcn->pkcn_name, cn->cn_nameptr, cn->cn_namelen);
463: pkcn->pkcn_name[cn->cn_namelen] = '\0';
464: }
1.12 pooka 465: pkcn->pkcn_namelen = cn->cn_namelen;
1.38 pooka 466: pkcn->pkcn_consume = 0;
1.36 pooka 467:
468: puffs_credcvt(pkcr, cn->cn_cred);
1.1 pooka 469: }
470:
471: /*
1.36 pooka 472: * Convert given credentials to struct puffs_kcred for userspace.
1.1 pooka 473: */
474: void
1.36 pooka 475: puffs_credcvt(struct puffs_kcred *pkcr, const kauth_cred_t cred)
1.1 pooka 476: {
477:
1.36 pooka 478: memset(pkcr, 0, sizeof(struct puffs_kcred));
1.1 pooka 479:
480: if (cred == NOCRED || cred == FSCRED) {
1.36 pooka 481: pkcr->pkcr_type = PUFFCRED_TYPE_INTERNAL;
1.1 pooka 482: if (cred == NOCRED)
1.36 pooka 483: pkcr->pkcr_internal = PUFFCRED_CRED_NOCRED;
1.1 pooka 484: if (cred == FSCRED)
1.36 pooka 485: pkcr->pkcr_internal = PUFFCRED_CRED_FSCRED;
1.1 pooka 486: } else {
1.36 pooka 487: pkcr->pkcr_type = PUFFCRED_TYPE_UUC;
488: kauth_cred_to_uucred(&pkcr->pkcr_uuc, cred);
1.1 pooka 489: }
490: }
491:
1.37 pooka 492: void
493: puffs_cidcvt(struct puffs_kcid *pkcid, const struct lwp *l)
1.1 pooka 494: {
495:
1.37 pooka 496: if (l) {
497: pkcid->pkcid_type = PUFFCID_TYPE_REAL;
498: pkcid->pkcid_pid = l->l_proc->p_pid;
499: pkcid->pkcid_lwpid = l->l_lid;
500: } else {
501: pkcid->pkcid_type = PUFFCID_TYPE_FAKE;
502: pkcid->pkcid_pid = 0;
503: pkcid->pkcid_lwpid = 0;
504: }
1.1 pooka 505: }
1.7 pooka 506:
507: static void
1.8 christos 508: puffs_gop_size(struct vnode *vp, off_t size, off_t *eobp,
509: int flags)
1.7 pooka 510: {
511:
512: *eobp = size;
513: }
514:
515: static void
516: puffs_gop_markupdate(struct vnode *vp, int flags)
517: {
518: int uflags = 0;
519:
520: if (flags & GOP_UPDATE_ACCESSED)
521: uflags |= PUFFS_UPDATEATIME;
522: if (flags & GOP_UPDATE_MODIFIED)
523: uflags |= PUFFS_UPDATEMTIME;
524:
525: puffs_updatenode(vp, uflags);
526: }
527:
528: void
529: puffs_updatenode(struct vnode *vp, int flags)
530: {
1.25 pooka 531: struct puffs_node *pn;
1.7 pooka 532: struct timespec ts;
533:
534: if (flags == 0)
535: return;
536:
1.25 pooka 537: pn = VPTOPP(vp);
1.7 pooka 538: nanotime(&ts);
539:
1.25 pooka 540: if (flags & PUFFS_UPDATEATIME) {
541: pn->pn_mc_atime = ts;
542: pn->pn_stat |= PNODE_METACACHE_ATIME;
543: }
544: if (flags & PUFFS_UPDATECTIME) {
545: pn->pn_mc_ctime = ts;
546: pn->pn_stat |= PNODE_METACACHE_CTIME;
547: }
548: if (flags & PUFFS_UPDATEMTIME) {
549: pn->pn_mc_mtime = ts;
550: pn->pn_stat |= PNODE_METACACHE_MTIME;
551: }
552: if (flags & PUFFS_UPDATESIZE) {
553: pn->pn_mc_size = vp->v_size;
554: pn->pn_stat |= PNODE_METACACHE_SIZE;
555: }
1.7 pooka 556: }
1.9 pooka 557:
558: void
559: puffs_updatevpsize(struct vnode *vp)
560: {
561: struct vattr va;
562:
563: if (VOP_GETATTR(vp, &va, FSCRED, NULL))
564: return;
565:
566: if (va.va_size != VNOVAL)
567: vp->v_size = va.va_size;
568: }
1.27 pooka 569:
570: void
571: puffs_parkdone_asyncbioread(struct puffs_req *preq, void *arg)
572: {
573: struct puffs_vnreq_read *read_argp = (void *)preq;
574: struct buf *bp = arg;
575: size_t moved;
576:
577: bp->b_error = preq->preq_rv;
578: if (bp->b_error == 0) {
579: moved = bp->b_bcount - read_argp->pvnr_resid;
580: bp->b_resid = read_argp->pvnr_resid;
581:
582: memcpy(bp->b_data, read_argp->pvnr_data, moved);
583: }
584:
585: biodone(bp);
586: free(preq, M_PUFFS);
587: }
1.28 pooka 588:
1.44 pooka 589: /* XXX: userspace can leak kernel resources */
1.28 pooka 590: void
1.31 pooka 591: puffs_parkdone_poll(struct puffs_req *preq, void *arg)
592: {
593: struct puffs_vnreq_poll *poll_argp = (void *)preq;
594: struct puffs_node *pn = arg;
595: int revents;
596:
597: if (preq->preq_rv == 0)
598: revents = poll_argp->pvnr_events;
599: else
600: revents = POLLERR;
601:
602: mutex_enter(&pn->pn_mtx);
603: pn->pn_revents |= revents;
604: mutex_exit(&pn->pn_mtx);
605:
606: selnotify(&pn->pn_sel, 0);
607: free(preq, M_PUFFS);
608:
609: puffs_releasenode(pn);
610: }
611:
612: void
1.28 pooka 613: puffs_mp_reference(struct puffs_mount *pmp)
614: {
615:
616: KASSERT(mutex_owned(&pmp->pmp_lock));
617: pmp->pmp_refcount++;
618: }
619:
620: void
621: puffs_mp_release(struct puffs_mount *pmp)
622: {
623:
624: KASSERT(mutex_owned(&pmp->pmp_lock));
625: if (--pmp->pmp_refcount == 0)
626: cv_broadcast(&pmp->pmp_refcount_cv);
627: }
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