/* $NetBSD: ultrix_fs.c,v 1.58 2017/12/03 12:53:52 maxv 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ultrix_fs.c,v 1.58 2017/12/03 12:53:52 maxv Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/exec.h>
#include <sys/namei.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/vnode_if.h>
#include <net/if.h>
#include <netinet/in.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <nfs/nfsmount.h>
#include <ufs/ufs/quota.h>
#include <ufs/ufs/ufsmount.h>
#include <sys/syscallargs.h>
#include <compat/ultrix/ultrix_syscallargs.h>
#include <compat/common/compat_util.h>
#include <compat/sys/mount.h>
#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;
}