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Annotation of src/sys/miscfs/portal/portal_vfsops.c, Revision 1.26

1.26    ! mrg         1: /*     $NetBSD: portal_vfsops.c,v 1.25 2001/01/22 12:17:39 jdolecek 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    ! mrg        46: #if defined(_KERNEL_OPT)
1.18      jonathan   47: #include "opt_compat_netbsd.h"
                     48: #endif
1.1       cgd        49:
                     50: #include <sys/param.h>
                     51: #include <sys/systm.h>
                     52: #include <sys/time.h>
                     53: #include <sys/types.h>
                     54: #include <sys/proc.h>
                     55: #include <sys/filedesc.h>
                     56: #include <sys/file.h>
                     57: #include <sys/vnode.h>
                     58: #include <sys/mount.h>
                     59: #include <sys/namei.h>
                     60: #include <sys/malloc.h>
                     61: #include <sys/mbuf.h>
                     62: #include <sys/socket.h>
                     63: #include <sys/socketvar.h>
                     64: #include <sys/protosw.h>
                     65: #include <sys/domain.h>
                     66: #include <sys/un.h>
                     67: #include <miscfs/portal/portal.h>
                     68:
1.14      christos   69: void   portal_init __P((void));
1.23      jdolecek   70: void   portal_done __P((void));
1.15      cgd        71: int    portal_mount __P((struct mount *, const char *, void *,
1.14      christos   72:                          struct nameidata *, struct proc *));
                     73: int    portal_start __P((struct mount *, int, struct proc *));
                     74: int    portal_unmount __P((struct mount *, int, struct proc *));
                     75: int    portal_root __P((struct mount *, struct vnode **));
                     76: int    portal_quotactl __P((struct mount *, int, uid_t, caddr_t,
                     77:                             struct proc *));
                     78: int    portal_statfs __P((struct mount *, struct statfs *, struct proc *));
                     79: int    portal_sync __P((struct mount *, int, struct ucred *, struct proc *));
                     80: int    portal_vget __P((struct mount *, ino_t, struct vnode **));
1.21      wrstuden   81: int    portal_fhtovp __P((struct mount *, struct fid *, struct vnode **));
                     82: int    portal_checkexp __P((struct mount *, struct mbuf *, int *,
                     83:                           struct ucred **));
1.14      christos   84: int    portal_vptofh __P((struct vnode *, struct fid *));
1.17      fvdl       85: int    portal_sysctl __P((int *, u_int, void *, size_t *, void *, size_t,
                     86:                           struct proc *));
1.14      christos   87:
                     88: void
1.5       mycroft    89: portal_init()
                     90: {
1.1       cgd        91: }
                     92:
1.23      jdolecek   93: void
                     94: portal_done()
                     95: {
                     96: }
                     97:
1.1       cgd        98: /*
                     99:  * Mount the per-process file descriptors (/dev/fd)
                    100:  */
1.5       mycroft   101: int
1.1       cgd       102: portal_mount(mp, path, data, ndp, p)
                    103:        struct mount *mp;
1.15      cgd       104:        const char *path;
                    105:        void *data;
1.1       cgd       106:        struct nameidata *ndp;
                    107:        struct proc *p;
                    108: {
1.5       mycroft   109:        struct file *fp;
1.1       cgd       110:        struct portal_args args;
                    111:        struct portalmount *fmp;
1.5       mycroft   112:        struct socket *so;
1.1       cgd       113:        struct vnode *rvp;
1.12      mycroft   114:        size_t size;
1.5       mycroft   115:        int error;
1.1       cgd       116:
                    117:        /*
                    118:         * Update is a no-op
                    119:         */
                    120:        if (mp->mnt_flag & MNT_UPDATE)
                    121:                return (EOPNOTSUPP);
                    122:
1.14      christos  123:        error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
                    124:        if (error)
1.1       cgd       125:                return (error);
                    126:
1.22      thorpej   127:        /* getsock() will use the descriptor for us */
1.14      christos  128:        if ((error = getsock(p->p_fd, args.pa_socket, &fp)) != 0)
1.1       cgd       129:                return (error);
                    130:        so = (struct socket *) fp->f_data;
1.22      thorpej   131:        FILE_UNUSE(fp, NULL);
1.19      lukem     132:        if (so->so_proto->pr_domain->dom_family != AF_LOCAL)
1.1       cgd       133:                return (ESOCKTNOSUPPORT);
                    134:
1.5       mycroft   135:        error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
1.1       cgd       136:        if (error)
                    137:                return (error);
1.5       mycroft   138:        MALLOC(rvp->v_data, void *, sizeof(struct portalnode),
                    139:                M_TEMP, M_WAITOK);
1.1       cgd       140:
                    141:        fmp = (struct portalmount *) malloc(sizeof(struct portalmount),
                    142:                                 M_UFSMNT, M_WAITOK);   /* XXX */
                    143:        rvp->v_type = VDIR;
                    144:        rvp->v_flag |= VROOT;
                    145:        VTOPORTAL(rvp)->pt_arg = 0;
                    146:        VTOPORTAL(rvp)->pt_size = 0;
                    147:        VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
                    148:        fmp->pm_root = rvp;
                    149:        fmp->pm_server = fp; fp->f_count++;
                    150:
1.5       mycroft   151:        mp->mnt_flag |= MNT_LOCAL;
1.7       mycroft   152:        mp->mnt_data = (qaddr_t)fmp;
1.24      assar     153:        vfs_getnewfsid(mp);
1.1       cgd       154:
1.10      mycroft   155:        (void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
1.20      perry     156:        memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size);
1.10      mycroft   157:        (void) copyinstr(args.pa_config, mp->mnt_stat.f_mntfromname,
                    158:            MNAMELEN - 1, &size);
1.20      perry     159:        memset(mp->mnt_stat.f_mntfromname + size, 0, MNAMELEN - size);
1.1       cgd       160:        return (0);
                    161: }
                    162:
1.5       mycroft   163: int
1.1       cgd       164: portal_start(mp, flags, p)
                    165:        struct mount *mp;
                    166:        int flags;
                    167:        struct proc *p;
                    168: {
1.5       mycroft   169:
1.1       cgd       170:        return (0);
                    171: }
                    172:
1.5       mycroft   173: int
1.1       cgd       174: portal_unmount(mp, mntflags, p)
                    175:        struct mount *mp;
                    176:        int mntflags;
                    177:        struct proc *p;
                    178: {
                    179:        struct vnode *rootvp = VFSTOPORTAL(mp)->pm_root;
1.5       mycroft   180:        int error, flags = 0;
1.1       cgd       181:
1.17      fvdl      182:        if (mntflags & MNT_FORCE)
1.1       cgd       183:                flags |= FORCECLOSE;
                    184:
                    185:        /*
                    186:         * Clear out buffer cache.  I don't think we
                    187:         * ever get anything cached at this level at the
                    188:         * moment, but who knows...
                    189:         */
1.5       mycroft   190: #ifdef notyet
1.1       cgd       191:        mntflushbuf(mp, 0);
                    192:        if (mntinvalbuf(mp, 1))
                    193:                return (EBUSY);
1.5       mycroft   194: #endif
1.1       cgd       195:        if (rootvp->v_usecount > 1)
                    196:                return (EBUSY);
1.14      christos  197:        if ((error = vflush(mp, rootvp, flags)) != 0)
1.1       cgd       198:                return (error);
                    199:
                    200:        /*
                    201:         * Release reference on underlying root vnode
                    202:         */
                    203:        vrele(rootvp);
                    204:        /*
                    205:         * And blow it away for future re-use
                    206:         */
                    207:        vgone(rootvp);
                    208:        /*
                    209:         * Shutdown the socket.  This will cause the select in the
                    210:         * daemon to wake up, and then the accept will get ECONNABORTED
                    211:         * which it interprets as a request to go and bury itself.
                    212:         */
1.22      thorpej   213:        FILE_USE(VFSTOPORTAL(mp)->pm_server);
1.1       cgd       214:        soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
                    215:        /*
                    216:         * Discard reference to underlying file.  Must call closef because
                    217:         * this may be the last reference.
                    218:         */
                    219:        closef(VFSTOPORTAL(mp)->pm_server, (struct proc *) 0);
                    220:        /*
                    221:         * Finally, throw away the portalmount structure
                    222:         */
                    223:        free(mp->mnt_data, M_UFSMNT);   /* XXX */
                    224:        mp->mnt_data = 0;
1.5       mycroft   225:        return (0);
1.1       cgd       226: }
                    227:
1.5       mycroft   228: int
1.1       cgd       229: portal_root(mp, vpp)
                    230:        struct mount *mp;
                    231:        struct vnode **vpp;
                    232: {
                    233:        struct vnode *vp;
                    234:
                    235:        /*
                    236:         * Return locked reference to root.
                    237:         */
                    238:        vp = VFSTOPORTAL(mp)->pm_root;
                    239:        VREF(vp);
1.17      fvdl      240:        vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1.1       cgd       241:        *vpp = vp;
                    242:        return (0);
                    243: }
                    244:
1.5       mycroft   245: int
1.1       cgd       246: portal_quotactl(mp, cmd, uid, arg, p)
                    247:        struct mount *mp;
                    248:        int cmd;
                    249:        uid_t uid;
                    250:        caddr_t arg;
                    251:        struct proc *p;
                    252: {
1.5       mycroft   253:
1.1       cgd       254:        return (EOPNOTSUPP);
                    255: }
                    256:
1.5       mycroft   257: int
1.1       cgd       258: portal_statfs(mp, sbp, p)
                    259:        struct mount *mp;
                    260:        struct statfs *sbp;
                    261:        struct proc *p;
                    262: {
                    263:
                    264:        sbp->f_bsize = DEV_BSIZE;
1.3       cgd       265:        sbp->f_iosize = DEV_BSIZE;
1.1       cgd       266:        sbp->f_blocks = 2;              /* 1K to keep df happy */
                    267:        sbp->f_bfree = 0;
                    268:        sbp->f_bavail = 0;
                    269:        sbp->f_files = 1;               /* Allow for "." */
                    270:        sbp->f_ffree = 0;               /* See comments above */
1.17      fvdl      271: #ifdef COMPAT_09
                    272:        sbp->f_type = 12;
                    273: #else
                    274:        sbp->f_type = 0;
                    275: #endif
1.1       cgd       276:        if (sbp != &mp->mnt_stat) {
1.20      perry     277:                memcpy(&sbp->f_fsid, &mp->mnt_stat.f_fsid, sizeof(sbp->f_fsid));
                    278:                memcpy(sbp->f_mntonname, mp->mnt_stat.f_mntonname, MNAMELEN);
                    279:                memcpy(sbp->f_mntfromname, mp->mnt_stat.f_mntfromname, MNAMELEN);
1.1       cgd       280:        }
1.10      mycroft   281:        strncpy(sbp->f_fstypename, mp->mnt_op->vfs_name, MFSNAMELEN);
1.1       cgd       282:        return (0);
                    283: }
                    284:
1.14      christos  285: /*ARGSUSED*/
1.5       mycroft   286: int
1.14      christos  287: portal_sync(mp, waitfor, uc, p)
1.1       cgd       288:        struct mount *mp;
                    289:        int waitfor;
1.14      christos  290:        struct ucred *uc;
                    291:        struct proc *p;
1.1       cgd       292: {
1.5       mycroft   293:
1.1       cgd       294:        return (0);
                    295: }
                    296:
1.5       mycroft   297: int
                    298: portal_vget(mp, ino, vpp)
                    299:        struct mount *mp;
                    300:        ino_t ino;
                    301:        struct vnode **vpp;
                    302: {
                    303:
                    304:        return (EOPNOTSUPP);
                    305: }
                    306:
                    307: int
1.21      wrstuden  308: portal_fhtovp(mp, fhp, vpp)
1.1       cgd       309:        struct mount *mp;
                    310:        struct fid *fhp;
1.21      wrstuden  311:        struct vnode **vpp;
                    312: {
                    313:
                    314:        return (EOPNOTSUPP);
                    315: }
                    316:
                    317: int
                    318: portal_checkexp(mp, mb, what, anon)
                    319:        struct mount *mp;
1.14      christos  320:        struct mbuf *mb;
                    321:        int *what;
                    322:        struct ucred **anon;
1.1       cgd       323: {
1.5       mycroft   324:
1.1       cgd       325:        return (EOPNOTSUPP);
                    326: }
                    327:
1.5       mycroft   328: int
1.1       cgd       329: portal_vptofh(vp, fhp)
                    330:        struct vnode *vp;
                    331:        struct fid *fhp;
                    332: {
1.5       mycroft   333:
1.1       cgd       334:        return (EOPNOTSUPP);
                    335: }
                    336:
1.17      fvdl      337: int
                    338: portal_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
                    339:        int *name;
                    340:        u_int namelen;
                    341:        void *oldp;
                    342:        size_t *oldlenp;
                    343:        void *newp;
                    344:        size_t newlen;
                    345:        struct proc *p;
                    346: {
                    347:        return (EOPNOTSUPP);
                    348: }
                    349:
1.25      jdolecek  350: extern const struct vnodeopv_desc portal_vnodeop_opv_desc;
1.16      thorpej   351:
1.25      jdolecek  352: const struct vnodeopv_desc * const portal_vnodeopv_descs[] = {
1.16      thorpej   353:        &portal_vnodeop_opv_desc,
                    354:        NULL,
                    355: };
                    356:
1.1       cgd       357: struct vfsops portal_vfsops = {
1.2       cgd       358:        MOUNT_PORTAL,
1.1       cgd       359:        portal_mount,
                    360:        portal_start,
                    361:        portal_unmount,
                    362:        portal_root,
                    363:        portal_quotactl,
                    364:        portal_statfs,
                    365:        portal_sync,
1.5       mycroft   366:        portal_vget,
1.1       cgd       367:        portal_fhtovp,
                    368:        portal_vptofh,
                    369:        portal_init,
1.23      jdolecek  370:        portal_done,
1.17      fvdl      371:        portal_sysctl,
1.16      thorpej   372:        NULL,                           /* vfs_mountroot */
1.21      wrstuden  373:        portal_checkexp,
1.16      thorpej   374:        portal_vnodeopv_descs,
1.1       cgd       375: };

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