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Annotation of src/sys/miscfs/portal/portal_vfsops.c, Revision 1.26.2.1

1.26.2.1! thorpej     1: /*     $NetBSD: portal_vfsops.c,v 1.29 2001/11/15 09:48:23 lukem Exp $ */
1.6       cgd         2:
1.1       cgd         3: /*
1.17      fvdl        4:  * Copyright (c) 1992, 1993, 1995
1.5       mycroft     5:  *     The Regents of the University of California.  All rights reserved.
1.1       cgd         6:  *
                      7:  * This code is derived from software donated to Berkeley by
                      8:  * Jan-Simon Pendry.
                      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:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  *
1.5       mycroft    38:  *     from: Id: portal_vfsops.c,v 1.5 1992/05/30 10:25:27 jsp Exp
1.17      fvdl       39:  *     @(#)portal_vfsops.c     8.11 (Berkeley) 5/14/95
1.1       cgd        40:  */
                     41:
                     42: /*
                     43:  * Portal Filesystem
                     44:  */
1.18      jonathan   45:
1.26.2.1! thorpej    46: #include <sys/cdefs.h>
        !            47: __KERNEL_RCSID(0, "$NetBSD: portal_vfsops.c,v 1.29 2001/11/15 09:48:23 lukem Exp $");
        !            48:
1.26      mrg        49: #if defined(_KERNEL_OPT)
1.18      jonathan   50: #include "opt_compat_netbsd.h"
                     51: #endif
1.1       cgd        52:
                     53: #include <sys/param.h>
                     54: #include <sys/systm.h>
                     55: #include <sys/time.h>
                     56: #include <sys/proc.h>
                     57: #include <sys/filedesc.h>
                     58: #include <sys/file.h>
                     59: #include <sys/vnode.h>
                     60: #include <sys/mount.h>
                     61: #include <sys/namei.h>
                     62: #include <sys/malloc.h>
                     63: #include <sys/mbuf.h>
                     64: #include <sys/socket.h>
                     65: #include <sys/socketvar.h>
                     66: #include <sys/protosw.h>
                     67: #include <sys/domain.h>
                     68: #include <sys/un.h>
                     69: #include <miscfs/portal/portal.h>
                     70:
1.14      christos   71: void   portal_init __P((void));
1.23      jdolecek   72: void   portal_done __P((void));
1.15      cgd        73: int    portal_mount __P((struct mount *, const char *, void *,
1.14      christos   74:                          struct nameidata *, struct proc *));
                     75: int    portal_start __P((struct mount *, int, struct proc *));
                     76: int    portal_unmount __P((struct mount *, int, struct proc *));
                     77: int    portal_root __P((struct mount *, struct vnode **));
                     78: int    portal_quotactl __P((struct mount *, int, uid_t, caddr_t,
                     79:                             struct proc *));
                     80: int    portal_statfs __P((struct mount *, struct statfs *, struct proc *));
                     81: int    portal_sync __P((struct mount *, int, struct ucred *, struct proc *));
                     82: int    portal_vget __P((struct mount *, ino_t, struct vnode **));
1.21      wrstuden   83: int    portal_fhtovp __P((struct mount *, struct fid *, struct vnode **));
                     84: int    portal_checkexp __P((struct mount *, struct mbuf *, int *,
                     85:                           struct ucred **));
1.14      christos   86: int    portal_vptofh __P((struct vnode *, struct fid *));
1.17      fvdl       87: int    portal_sysctl __P((int *, u_int, void *, size_t *, void *, size_t,
                     88:                           struct proc *));
1.14      christos   89:
                     90: void
1.5       mycroft    91: portal_init()
                     92: {
1.1       cgd        93: }
                     94:
1.23      jdolecek   95: void
                     96: portal_done()
                     97: {
                     98: }
                     99:
1.1       cgd       100: /*
                    101:  * Mount the per-process file descriptors (/dev/fd)
                    102:  */
1.5       mycroft   103: int
1.1       cgd       104: portal_mount(mp, path, data, ndp, p)
                    105:        struct mount *mp;
1.15      cgd       106:        const char *path;
                    107:        void *data;
1.1       cgd       108:        struct nameidata *ndp;
                    109:        struct proc *p;
                    110: {
1.5       mycroft   111:        struct file *fp;
1.1       cgd       112:        struct portal_args args;
                    113:        struct portalmount *fmp;
1.5       mycroft   114:        struct socket *so;
1.1       cgd       115:        struct vnode *rvp;
1.12      mycroft   116:        size_t size;
1.5       mycroft   117:        int error;
1.1       cgd       118:
                    119:        /*
                    120:         * Update is a no-op
                    121:         */
                    122:        if (mp->mnt_flag & MNT_UPDATE)
                    123:                return (EOPNOTSUPP);
                    124:
1.14      christos  125:        error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
                    126:        if (error)
1.1       cgd       127:                return (error);
                    128:
1.22      thorpej   129:        /* getsock() will use the descriptor for us */
1.14      christos  130:        if ((error = getsock(p->p_fd, args.pa_socket, &fp)) != 0)
1.1       cgd       131:                return (error);
                    132:        so = (struct socket *) fp->f_data;
1.22      thorpej   133:        FILE_UNUSE(fp, NULL);
1.19      lukem     134:        if (so->so_proto->pr_domain->dom_family != AF_LOCAL)
1.1       cgd       135:                return (ESOCKTNOSUPPORT);
                    136:
1.5       mycroft   137:        error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
1.1       cgd       138:        if (error)
                    139:                return (error);
1.5       mycroft   140:        MALLOC(rvp->v_data, void *, sizeof(struct portalnode),
                    141:                M_TEMP, M_WAITOK);
1.1       cgd       142:
                    143:        fmp = (struct portalmount *) malloc(sizeof(struct portalmount),
                    144:                                 M_UFSMNT, M_WAITOK);   /* XXX */
                    145:        rvp->v_type = VDIR;
                    146:        rvp->v_flag |= VROOT;
                    147:        VTOPORTAL(rvp)->pt_arg = 0;
                    148:        VTOPORTAL(rvp)->pt_size = 0;
                    149:        VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
                    150:        fmp->pm_root = rvp;
                    151:        fmp->pm_server = fp; fp->f_count++;
                    152:
1.5       mycroft   153:        mp->mnt_flag |= MNT_LOCAL;
1.7       mycroft   154:        mp->mnt_data = (qaddr_t)fmp;
1.24      assar     155:        vfs_getnewfsid(mp);
1.1       cgd       156:
1.10      mycroft   157:        (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
1.20      perry     158:        memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size);
1.10      mycroft   159:        (void) copyinstr(args.pa_config, mp->mnt_stat.f_mntfromname,
                    160:            MNAMELEN - 1, &size);
1.20      perry     161:        memset(mp->mnt_stat.f_mntfromname + size, 0, MNAMELEN - size);
1.1       cgd       162:        return (0);
                    163: }
                    164:
1.5       mycroft   165: int
1.1       cgd       166: portal_start(mp, flags, p)
                    167:        struct mount *mp;
                    168:        int flags;
                    169:        struct proc *p;
                    170: {
1.5       mycroft   171:
1.1       cgd       172:        return (0);
                    173: }
                    174:
1.5       mycroft   175: int
1.1       cgd       176: portal_unmount(mp, mntflags, p)
                    177:        struct mount *mp;
                    178:        int mntflags;
                    179:        struct proc *p;
                    180: {
                    181:        struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root;
1.5       mycroft   182:        int error, flags = 0;
1.1       cgd       183:
1.17      fvdl      184:        if (mntflags & MNT_FORCE)
1.1       cgd       185:                flags |= FORCECLOSE;
                    186:
                    187:        /*
                    188:         * Clear out buffer cache.  I don't think we
                    189:         * ever get anything cached at this level at the
                    190:         * moment, but who knows...
                    191:         */
1.5       mycroft   192: #ifdef notyet
1.1       cgd       193:        mntflushbuf(mp, 0);
                    194:        if (mntinvalbuf(mp, 1))
                    195:                return (EBUSY);
1.5       mycroft   196: #endif
1.1       cgd       197:        if (rootvp->v_usecount > 1)
                    198:                return (EBUSY);
1.14      christos  199:        if ((error = vflush(mp, rootvp, flags)) != 0)
1.1       cgd       200:                return (error);
                    201:
                    202:        /*
                    203:         * Release reference on underlying root vnode
                    204:         */
                    205:        vrele(rootvp);
                    206:        /*
                    207:         * And blow it away for future re-use
                    208:         */
                    209:        vgone(rootvp);
                    210:        /*
                    211:         * Shutdown the socket.  This will cause the select in the
                    212:         * daemon to wake up, and then the accept will get ECONNABORTED
                    213:         * which it interprets as a request to go and bury itself.
                    214:         */
1.22      thorpej   215:        FILE_USE(VFSTOPORTAL(mp)->pm_server);
1.1       cgd       216:        soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
                    217:        /*
                    218:         * Discard reference to underlying file.  Must call closef because
                    219:         * this may be the last reference.
                    220:         */
                    221:        closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
                    222:        /*
                    223:         * Finally, throw away the portalmount structure
                    224:         */
                    225:        free(mp->mnt_data, M_UFSMNT);   /* XXX */
                    226:        mp->mnt_data = 0;
1.5       mycroft   227:        return (0);
1.1       cgd       228: }
                    229:
1.5       mycroft   230: int
1.1       cgd       231: portal_root(mp, vpp)
                    232:        struct mount *mp;
                    233:        struct vnode **vpp;
                    234: {
                    235:        struct vnode *vp;
                    236:
                    237:        /*
                    238:         * Return locked reference to root.
                    239:         */
                    240:        vp = VFSTOPORTAL(mp)->pm_root;
                    241:        VREF(vp);
1.17      fvdl      242:        vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1.1       cgd       243:        *vpp = vp;
                    244:        return (0);
                    245: }
                    246:
1.5       mycroft   247: int
1.1       cgd       248: portal_quotactl(mp, cmd, uid, arg, p)
                    249:        struct mount *mp;
                    250:        int cmd;
                    251:        uid_t uid;
                    252:        caddr_t arg;
                    253:        struct proc *p;
                    254: {
1.5       mycroft   255:
1.1       cgd       256:        return (EOPNOTSUPP);
                    257: }
                    258:
1.5       mycroft   259: int
1.1       cgd       260: portal_statfs(mp, sbp, p)
                    261:        struct mount *mp;
                    262:        struct statfs *sbp;
                    263:        struct proc *p;
                    264: {
                    265:
                    266:        sbp->f_bsize = DEV_BSIZE;
1.3       cgd       267:        sbp->f_iosize = DEV_BSIZE;
1.1       cgd       268:        sbp->f_blocks = 2;              /* 1K to keep df happy */
                    269:        sbp->f_bfree = 0;
                    270:        sbp->f_bavail = 0;
                    271:        sbp->f_files = 1;               /* Allow for "." */
                    272:        sbp->f_ffree = 0;               /* See comments above */
1.17      fvdl      273: #ifdef COMPAT_09
                    274:        sbp->f_type = 12;
                    275: #else
                    276:        sbp->f_type = 0;
                    277: #endif
1.1       cgd       278:        if (sbp != &mp->mnt_stat) {
1.20      perry     279:                memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid));
                    280:                memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN);
                    281:                memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN);
1.1       cgd       282:        }
1.10      mycroft   283:        strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
1.1       cgd       284:        return (0);
                    285: }
                    286:
1.14      christos  287: /*ARGSUSED*/
1.5       mycroft   288: int
1.14      christos  289: portal_sync(mp, waitfor, uc, p)
1.1       cgd       290:        struct mount *mp;
                    291:        int waitfor;
1.14      christos  292:        struct ucred *uc;
                    293:        struct proc *p;
1.1       cgd       294: {
1.5       mycroft   295:
1.1       cgd       296:        return (0);
                    297: }
                    298:
1.5       mycroft   299: int
                    300: portal_vget(mp, ino, vpp)
                    301:        struct mount *mp;
                    302:        ino_t ino;
                    303:        struct vnode **vpp;
                    304: {
                    305:
                    306:        return (EOPNOTSUPP);
                    307: }
                    308:
                    309: int
1.21      wrstuden  310: portal_fhtovp(mp, fhp, vpp)
1.1       cgd       311:        struct mount *mp;
                    312:        struct fid *fhp;
1.21      wrstuden  313:        struct vnode **vpp;
                    314: {
                    315:
                    316:        return (EOPNOTSUPP);
                    317: }
                    318:
                    319: int
                    320: portal_checkexp(mp, mb, what, anon)
                    321:        struct mount *mp;
1.14      christos  322:        struct mbuf *mb;
                    323:        int *what;
                    324:        struct ucred **anon;
1.1       cgd       325: {
1.5       mycroft   326:
1.1       cgd       327:        return (EOPNOTSUPP);
                    328: }
                    329:
1.5       mycroft   330: int
1.1       cgd       331: portal_vptofh(vp, fhp)
                    332:        struct vnode *vp;
                    333:        struct fid *fhp;
                    334: {
1.5       mycroft   335:
1.1       cgd       336:        return (EOPNOTSUPP);
                    337: }
                    338:
1.17      fvdl      339: int
                    340: portal_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
                    341:        int *name;
                    342:        u_int namelen;
                    343:        void *oldp;
                    344:        size_t *oldlenp;
                    345:        void *newp;
                    346:        size_t newlen;
                    347:        struct proc *p;
                    348: {
                    349:        return (EOPNOTSUPP);
                    350: }
                    351:
1.25      jdolecek  352: extern const struct vnodeopv_desc portal_vnodeop_opv_desc;
1.16      thorpej   353:
1.25      jdolecek  354: const struct vnodeopv_desc * const portal_vnodeopv_descs[] = {
1.16      thorpej   355:        &portal_vnodeop_opv_desc,
                    356:        NULL,
                    357: };
                    358:
1.1       cgd       359: struct vfsops portal_vfsops = {
1.2       cgd       360:        MOUNT_PORTAL,
1.1       cgd       361:        portal_mount,
                    362:        portal_start,
                    363:        portal_unmount,
                    364:        portal_root,
                    365:        portal_quotactl,
                    366:        portal_statfs,
                    367:        portal_sync,
1.5       mycroft   368:        portal_vget,
1.1       cgd       369:        portal_fhtovp,
                    370:        portal_vptofh,
                    371:        portal_init,
1.26.2.1! thorpej   372:        NULL,
1.23      jdolecek  373:        portal_done,
1.17      fvdl      374:        portal_sysctl,
1.16      thorpej   375:        NULL,                           /* vfs_mountroot */
1.21      wrstuden  376:        portal_checkexp,
1.16      thorpej   377:        portal_vnodeopv_descs,
1.1       cgd       378: };

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