/* $NetBSD: ultrix_fs.c,v 1.57.4.1 2017/12/21 19:08:10 snj Exp $ */ /* * Copyright (c) 1995, 1997 Jonathan Stone * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Jonathan Stone for * the NetBSD Project. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include __KERNEL_RCSID(0, "$NetBSD: ultrix_fs.c,v 1.57.4.1 2017/12/21 19:08:10 snj Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define ULTRIX_MAXPATHLEN 1024 /** ** Ultrix filesystem operations: mount(), getmnt(). ** These are included purely so one can place an (ECOFF or ELF) ** NetBSD/pmax kernel in an Ultrix root filesystem, boot it, ** and over-write the Ultrix root parition with NetBSD binaries. **/ /* * Ultrix file system data structure, as modified by * Ultrix getmntent(). This structure is padded to 2560 bytes, for * compatibility with the size the Ultrix kernel and user apps expect. */ struct ultrix_fs_data { uint32_t ufsd_flags; /* how mounted */ uint32_t ufsd_mtsize; /* max transfer size in bytes */ uint32_t ufsd_otsize; /* optimal transfer size in bytes */ uint32_t ufsd_bsize; /* fs block size (bytes) for vm code */ uint32_t ufsd_fstype; /* see ../h/fs_types.h */ uint32_t ufsd_gtot; /* total number of gnodes */ uint32_t ufsd_gfree; /* # of free gnodes */ uint32_t ufsd_btot; /* total number of 1K blocks */ uint32_t ufsd_bfree; /* # of free 1K blocks */ uint32_t ufsd_bfreen; /* user consumable 1K blocks */ uint32_t ufsd_pgthresh; /* min size in bytes before paging*/ int32_t ufsd_uid; /* uid that mounted me */ int16_t ufsd_dev; /* major/minor of fs */ int16_t ufsd_exroot; /* root mapping from exports */ char ufsd_devname[ULTRIX_MAXPATHLEN + 4]; /* name of dev */ char ufsd_path[ULTRIX_MAXPATHLEN + 4]; /* name of mnt point */ uint32_t ufsd_nupdate; /* number of writes */ uint32_t ufsd_pad[112]; /* pad to 2560 bytes. */ }; /* * Get statistics on mounted filesystems. */ #if 0 struct ultrix_getmnt_args { int32_t *start; struct ultrix_fs_data *buf; int32_t bufsize; int32_t mode; char *path; }; #endif /* * Ultrix getmnt() flags. * The operation getmnt() should perform is incoded in the flag * argument. There are two independent attributes. * * ULTRIX_NOSTAT_xxx will never hang, but it may not return * up-to-date statistics. (For NFS clients, it returns whatever is * in the cache.) ULTRIX_STAT_xxx returns up-to-date info but may * hang (e.g., on dead NFS servers). * * ULTRIX_xxSTAT_ONE returns statistics on just one filesystem, determined * by the parth argument. ULTRIX_xxSTAT_MANY ignores the path argument and * returns info on as many filesystems fit in the structure. * the start argument, which should be zero on the first call, * can be used to iterate over all filesystems. * */ #define ULTRIX_NOSTAT_MANY 1 #define ULTRIX_STAT_MANY 2 #define ULTRIX_STAT_ONE 3 #define ULTRIX_NOSTAT_ONE 4 /* * Ultrix gnode-layer filesystem codes. */ #define ULTRIX_FSTYPE_UNKNOWN 0x0 #define ULTRIX_FSTYPE_ULTRIX 0x1 /* Ultrix UFS: basically 4.2bsd FFS */ #define ULTRIX_FSTYPE_NFS 0x5 /* NFS v2 */ /* * Ultrix mount(2) options */ #define ULTRIX_NM_RONLY 0x0001 /* mount read-only */ #define ULTRIX_NM_SOFT 0x0002 /* soft mount (hard is default) */ #define ULTRIX_NM_WSIZE 0x0004 /* set write size */ #define ULTRIX_NM_RSIZE 0x0008 /* set read size */ #define ULTRIX_NM_TIMEO 0x0010 /* set initial timeout */ #define ULTRIX_NM_RETRANS 0x0020 /* set number of request retrys */ #define ULTRIX_NM_HOSTNAME 0x0040 /* set hostname for error printf */ #define ULTRIX_NM_PGTHRESH 0x0080 /* set page threshold for exec */ #define ULTRIX_NM_INT 0x0100 /* allow hard mount keyboard interrupts */ #define ULTRIX_NM_NOAC 0x0200 /* don't cache attributes */ static void make_ultrix_mntent(struct statvfs *, struct ultrix_fs_data *); /* * Construct an Ultrix getmnt() ultrix_fs_data from the native NetBSD * struct statfs. */ static void make_ultrix_mntent(struct statvfs *sp, struct ultrix_fs_data *tem) { memset(tem, 0, sizeof (*tem)); tem->ufsd_flags = sp->f_flag; /* XXX translate */ tem->ufsd_mtsize = sp->f_bsize; /* XXX max transfer size */ tem->ufsd_otsize = sp->f_iosize; tem->ufsd_bsize = sp->f_bsize; /* * Translate file system type. NetBSD/1.1 has f_type zero, * and uses an fstype string instead. * For now, map types not in Ultrix (kernfs, null, procfs...) * to UFS, since Ultrix mout will try and call mount_unknown * for ULTRIX_FSTYPE_UNKNOWN, but lacks a mount_unknown binary. */ tem->ufsd_fstype = ULTRIX_FSTYPE_NFS; if (strcmp(sp->f_fstypename, "ffs") == 0) tem->ufsd_fstype = ULTRIX_FSTYPE_ULTRIX; tem->ufsd_gtot = sp->f_files; /* total "gnodes" */ tem->ufsd_gfree = sp->f_ffree; /* free "gnodes" */ tem->ufsd_btot = sp->f_blocks; /* total 1k blocks */ #ifdef needsmorethought /* XXX */ /* tem->ufsd_bfree = sp->f_bfree; */ /* free 1k blocks */ /* tem->ufsd_bfree = sp->f_bavail; */ /* free 1k blocks */ #endif tem->ufsd_bfreen = sp->f_bavail; /* blocks available to users */ tem->ufsd_pgthresh = 0; /* not relevant */ tem->ufsd_uid = 0; /* XXX kept where ?*/ tem->ufsd_dev = 0; /* ?? */ tem->ufsd_exroot = 0; /* ?? */ strncpy(tem->ufsd_path, sp->f_mntonname, ULTRIX_MAXPATHLEN); strncpy(tem->ufsd_devname, sp->f_mntfromname, ULTRIX_MAXPATHLEN); #if 0 /* In NetBSD-1.1, filesystem type is unused and always 0 */ printf("mntent: %s type %d\n", tem->ufsd_devname, tem->ufsd_fstype); printf("mntent: %s tot %d free %d user%d\n", tem->ufsd_devname, sp->f_blocks, sp->f_bfree, sp->f_bavail); #endif } int ultrix_sys_getmnt(struct lwp *l, const struct ultrix_sys_getmnt_args *uap, register_t *retval) { struct mount *mp; struct statvfs *sp; struct ultrix_fs_data *sfsp; mount_iterator_t *iter; char *path; int mntflags; int skip; int start; long count, maxcount; int error; path = NULL; error = 0; maxcount = SCARG(uap, bufsize) / sizeof(struct ultrix_fs_data); sfsp = SCARG(uap, buf); if (SCARG(uap, mode) == ULTRIX_STAT_ONE || SCARG(uap, mode) == ULTRIX_STAT_MANY) mntflags = MNT_WAIT; else mntflags = MNT_NOWAIT; if (SCARG(uap, mode) == ULTRIX_STAT_ONE || SCARG(uap, mode) == ULTRIX_NOSTAT_ONE) { /* * Only get info on mountpoints that matches the path * provided. */ path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK); if ((error = copyinstr(SCARG(uap, path), path, MAXPATHLEN, NULL)) != 0) goto bad; skip = 0; maxcount = 1; } else { /* * Get info on any mountpoints, somewhat like readdir(). * Find out how many mount list entries to skip, and skip * them. */ if ((error = copyin((void *)SCARG(uap, start), &start, sizeof(*SCARG(uap, start)))) != 0) goto bad; skip = start; } count = 0; mountlist_iterator_init(&iter); while (count < maxcount && (mp = mountlist_iterator_next(iter))) { if (skip-- > 0) continue; if (sfsp != NULL) { struct ultrix_fs_data tem; sp = &mp->mnt_stat; /* * If requested, refresh the fsstat cache. */ if (mntflags != MNT_WAIT && (error = VFS_STATVFS(mp, sp)) != 0) continue; /* * XXX what does this do? -- cgd */ sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK; if (path == NULL || strcmp(path, sp->f_mntonname) == 0) { make_ultrix_mntent(sp, &tem); if ((error = copyout((void *)&tem, sfsp, sizeof(tem))) != 0) { goto bad_freeiter; } sfsp++; count++; } } } if (sfsp != NULL && count > maxcount) *retval = maxcount; else *retval = count; bad_freeiter: mountlist_iterator_destroy(iter); bad: if (path) free(path, M_TEMP); return error; } /* Old-style inet sockaddr (no len field) as passed to Ultrix mount(2) */ struct osockaddr_in { short sin_family; u_short sin_port; struct in_addr sin_addr; char sin_zero[8]; }; /* * fstype-dependent structure passed to Ultrix mount(2) when * mounting NFS filesystems */ struct ultrix_nfs_args { struct osockaddr_in *addr; /* file server address */ void *fh; /* file handle to be mounted */ int flags; /* flags */ int wsize; /* write size in bytes */ int rsize; /* read size in bytes */ int timeo; /* initial timeout in .1 secs */ int retrans; /* times to retry send */ char *hostname; /* server's hostname */ char *optstr; /* string of nfs mount options*/ int gfs_flags; /* gnode flags (ugh) */ int pg_thresh; /* paging threshold ? */ }; /* * fstype-dependent structure passed to Ultrix mount(2) when * mounting local (4.2bsd FFS) filesystems */ struct ultrix_ufs_args { uint32_t ufs_flags; /* mount flags?*/ uint32_t ufs_pgthresh; /* minimum file size to page */ }; int ultrix_sys_mount(struct lwp *l, const struct ultrix_sys_mount_args *uap, register_t *retval) { int error; int otype = SCARG(uap, type); char fsname[MFSNAMELEN]; register_t dummy; int nflags; nflags = 0; /* * Translate Ultrix integer mount codes for UFS and NFS to * NetBSD fstype strings. Other Ultrix filesystem types * (msdos, DEC ods-2) are not supported. */ /* Translate the Ultrix mount-readonly option parameter */ if (SCARG(uap, rdonly)) nflags |= MNT_RDONLY; #ifdef later parse ultrix mount option string and set NetBSD flags #endif if (otype == ULTRIX_FSTYPE_NFS) { struct ultrix_nfs_args una; struct nfs_args na; if ((error = copyin(SCARG(uap, data), &una, sizeof(una))) != 0) return error; #if 0 /* * This is the only syscall boundary the * address of the server passes, so do backwards * compatibility on 4.3style sockaddrs here. */ if ((error = copyin(una.addr, &osa, sizeof osa)) != 0) { printf("ultrix_mount: nfs copyin osa\n"); return error; } sap->sin_family = (u_char)osa.sin_family; sap->sin_len = sizeof(*sap); /* XXXX teach nfs how to do the above */ #endif na.version = NFS_ARGSVERSION; na.addr = (void *)una.addr; na.addrlen = sizeof (struct sockaddr_in); na.sotype = SOCK_DGRAM; na.proto = IPPROTO_UDP; na.fh = una.fh; na.fhsize = NFSX_V2FH; na.flags = /*una.flags;*/ NFSMNT_NOCONN | NFSMNT_RESVPORT; na.wsize = una.wsize; na.rsize = una.rsize; na.timeo = una.timeo; na.retrans = una.retrans; na.hostname = una.hostname; return do_sys_mount(l, "nfs", UIO_SYSSPACE, SCARG(uap, special), nflags, &na, UIO_SYSSPACE, sizeof na, &dummy); } /* * Translate fstype-dependent mount options from * Ultrix format to native. */ if (otype == ULTRIX_FSTYPE_ULTRIX) { /* attempt to mount a native, rather than 4.2bsd, ffs */ struct ufs_args ua; memset(&ua, 0, sizeof(ua)); ua.fspec = SCARG(uap, special); /* * Ultrix mount has no MNT_UPDATE flag. * Attempt to see if this is the root we're mounting, * and if so, set MNT_UPDATE so we can mount / read-write. */ fsname[0] = 0; if ((error = copyinstr(SCARG(uap, dir), fsname, sizeof fsname, NULL)) != 0) return(error); if (strcmp(fsname, "/") == 0) { nflags |= MNT_UPDATE; printf("COMPAT_ULTRIX: mount with MNT_UPDATE on %s\n", fsname); } return do_sys_mount(l, "ffs", UIO_SYSSPACE, SCARG(uap, dir), nflags, &ua, UIO_SYSSPACE, sizeof ua, &dummy); } return EINVAL; }