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Annotation of src/sys/fs/puffs/puffs_subr.c, Revision 1.40.2.1

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

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