435 lines
13 KiB
C
435 lines
13 KiB
C
/* $NetBSD: ultrix_fs.c,v 1.58 2017/12/03 12:53:52 maxv Exp $ */
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/*
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* Copyright (c) 1995, 1997 Jonathan Stone
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jonathan Stone for
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* the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ultrix_fs.c,v 1.58 2017/12/03 12:53:52 maxv Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/exec.h>
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#include <sys/namei.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/vnode.h>
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#include <sys/vnode_if.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfs.h>
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#include <nfs/nfsmount.h>
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#include <ufs/ufs/quota.h>
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#include <ufs/ufs/ufsmount.h>
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#include <sys/syscallargs.h>
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#include <compat/ultrix/ultrix_syscallargs.h>
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#include <compat/common/compat_util.h>
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#include <compat/sys/mount.h>
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#define ULTRIX_MAXPATHLEN 1024
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/**
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** Ultrix filesystem operations: mount(), getmnt().
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** These are included purely so one can place an (ECOFF or ELF)
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** NetBSD/pmax kernel in an Ultrix root filesystem, boot it,
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** and over-write the Ultrix root parition with NetBSD binaries.
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**/
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/*
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* Ultrix file system data structure, as modified by
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* Ultrix getmntent(). This structure is padded to 2560 bytes, for
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* compatibility with the size the Ultrix kernel and user apps expect.
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*/
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struct ultrix_fs_data {
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uint32_t ufsd_flags; /* how mounted */
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uint32_t ufsd_mtsize; /* max transfer size in bytes */
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uint32_t ufsd_otsize; /* optimal transfer size in bytes */
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uint32_t ufsd_bsize; /* fs block size (bytes) for vm code */
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uint32_t ufsd_fstype; /* see ../h/fs_types.h */
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uint32_t ufsd_gtot; /* total number of gnodes */
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uint32_t ufsd_gfree; /* # of free gnodes */
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uint32_t ufsd_btot; /* total number of 1K blocks */
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uint32_t ufsd_bfree; /* # of free 1K blocks */
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uint32_t ufsd_bfreen; /* user consumable 1K blocks */
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uint32_t ufsd_pgthresh; /* min size in bytes before paging*/
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int32_t ufsd_uid; /* uid that mounted me */
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int16_t ufsd_dev; /* major/minor of fs */
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int16_t ufsd_exroot; /* root mapping from exports */
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char ufsd_devname[ULTRIX_MAXPATHLEN + 4]; /* name of dev */
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char ufsd_path[ULTRIX_MAXPATHLEN + 4]; /* name of mnt point */
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uint32_t ufsd_nupdate; /* number of writes */
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uint32_t ufsd_pad[112]; /* pad to 2560 bytes. */
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};
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/*
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* Get statistics on mounted filesystems.
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*/
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#if 0
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struct ultrix_getmnt_args {
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int32_t *start;
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struct ultrix_fs_data *buf;
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int32_t bufsize;
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int32_t mode;
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char *path;
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};
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#endif
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/*
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* Ultrix getmnt() flags.
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* The operation getmnt() should perform is incoded in the flag
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* argument. There are two independent attributes.
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*
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* ULTRIX_NOSTAT_xxx will never hang, but it may not return
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* up-to-date statistics. (For NFS clients, it returns whatever is
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* in the cache.) ULTRIX_STAT_xxx returns up-to-date info but may
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* hang (e.g., on dead NFS servers).
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*
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* ULTRIX_xxSTAT_ONE returns statistics on just one filesystem, determined
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* by the parth argument. ULTRIX_xxSTAT_MANY ignores the path argument and
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* returns info on as many filesystems fit in the structure.
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* the start argument, which should be zero on the first call,
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* can be used to iterate over all filesystems.
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*
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*/
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#define ULTRIX_NOSTAT_MANY 1
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#define ULTRIX_STAT_MANY 2
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#define ULTRIX_STAT_ONE 3
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#define ULTRIX_NOSTAT_ONE 4
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/*
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* Ultrix gnode-layer filesystem codes.
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*/
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#define ULTRIX_FSTYPE_UNKNOWN 0x0
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#define ULTRIX_FSTYPE_ULTRIX 0x1 /* Ultrix UFS: basically 4.2bsd FFS */
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#define ULTRIX_FSTYPE_NFS 0x5 /* NFS v2 */
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/*
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* Ultrix mount(2) options
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*/
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#define ULTRIX_NM_RONLY 0x0001 /* mount read-only */
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#define ULTRIX_NM_SOFT 0x0002 /* soft mount (hard is default) */
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#define ULTRIX_NM_WSIZE 0x0004 /* set write size */
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#define ULTRIX_NM_RSIZE 0x0008 /* set read size */
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#define ULTRIX_NM_TIMEO 0x0010 /* set initial timeout */
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#define ULTRIX_NM_RETRANS 0x0020 /* set number of request retrys */
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#define ULTRIX_NM_HOSTNAME 0x0040 /* set hostname for error printf */
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#define ULTRIX_NM_PGTHRESH 0x0080 /* set page threshold for exec */
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#define ULTRIX_NM_INT 0x0100 /* allow hard mount keyboard interrupts */
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#define ULTRIX_NM_NOAC 0x0200 /* don't cache attributes */
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static void
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make_ultrix_mntent(struct statvfs *, struct ultrix_fs_data *);
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/*
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* Construct an Ultrix getmnt() ultrix_fs_data from the native NetBSD
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* struct statfs.
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*/
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static void
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make_ultrix_mntent(struct statvfs *sp, struct ultrix_fs_data *tem)
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{
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memset(tem, 0, sizeof (*tem));
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tem->ufsd_flags = sp->f_flag; /* XXX translate */
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tem->ufsd_mtsize = sp->f_bsize; /* XXX max transfer size */
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tem->ufsd_otsize = sp->f_iosize;
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tem->ufsd_bsize = sp->f_bsize;
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/*
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* Translate file system type. NetBSD/1.1 has f_type zero,
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* and uses an fstype string instead.
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* For now, map types not in Ultrix (kernfs, null, procfs...)
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* to UFS, since Ultrix mout will try and call mount_unknown
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* for ULTRIX_FSTYPE_UNKNOWN, but lacks a mount_unknown binary.
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*/
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tem->ufsd_fstype = ULTRIX_FSTYPE_NFS;
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if (strcmp(sp->f_fstypename, "ffs") == 0)
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tem->ufsd_fstype = ULTRIX_FSTYPE_ULTRIX;
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tem->ufsd_gtot = sp->f_files; /* total "gnodes" */
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tem->ufsd_gfree = sp->f_ffree; /* free "gnodes" */
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tem->ufsd_btot = sp->f_blocks; /* total 1k blocks */
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#ifdef needsmorethought /* XXX */
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/* tem->ufsd_bfree = sp->f_bfree; */ /* free 1k blocks */
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/* tem->ufsd_bfree = sp->f_bavail; */ /* free 1k blocks */
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#endif
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tem->ufsd_bfreen = sp->f_bavail; /* blocks available to users */
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tem->ufsd_pgthresh = 0; /* not relevant */
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tem->ufsd_uid = 0; /* XXX kept where ?*/
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tem->ufsd_dev = 0; /* ?? */
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tem->ufsd_exroot = 0; /* ?? */
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strncpy(tem->ufsd_path, sp->f_mntonname, ULTRIX_MAXPATHLEN);
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strncpy(tem->ufsd_devname, sp->f_mntfromname, ULTRIX_MAXPATHLEN);
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#if 0
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/* In NetBSD-1.1, filesystem type is unused and always 0 */
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printf("mntent: %s type %d\n", tem->ufsd_devname, tem->ufsd_fstype);
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printf("mntent: %s tot %d free %d user%d\n",
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tem->ufsd_devname, sp->f_blocks, sp->f_bfree, sp->f_bavail);
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#endif
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}
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int
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ultrix_sys_getmnt(struct lwp *l, const struct ultrix_sys_getmnt_args *uap, register_t *retval)
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{
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struct mount *mp;
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struct statvfs *sp;
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struct ultrix_fs_data *sfsp;
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mount_iterator_t *iter;
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char *path;
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int mntflags;
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int skip;
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int start;
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long count, maxcount;
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int error;
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path = NULL;
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error = 0;
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maxcount = SCARG(uap, bufsize) / sizeof(struct ultrix_fs_data);
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sfsp = SCARG(uap, buf);
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if (SCARG(uap, mode) == ULTRIX_STAT_ONE ||
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SCARG(uap, mode) == ULTRIX_STAT_MANY)
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mntflags = MNT_WAIT;
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else
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mntflags = MNT_NOWAIT;
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if (SCARG(uap, mode) == ULTRIX_STAT_ONE || SCARG(uap, mode) == ULTRIX_NOSTAT_ONE) {
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/*
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* Only get info on mountpoints that matches the path
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* provided.
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*/
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path = malloc(MAXPATHLEN, M_TEMP, M_WAITOK);
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if ((error = copyinstr(SCARG(uap, path), path,
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MAXPATHLEN, NULL)) != 0)
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goto bad;
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skip = 0;
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maxcount = 1;
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} else {
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/*
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* Get info on any mountpoints, somewhat like readdir().
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* Find out how many mount list entries to skip, and skip
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* them.
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*/
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if ((error = copyin((void *)SCARG(uap, start), &start,
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sizeof(*SCARG(uap, start)))) != 0)
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goto bad;
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skip = start;
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}
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count = 0;
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mountlist_iterator_init(&iter);
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while (count < maxcount && (mp = mountlist_iterator_next(iter))) {
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if (skip-- > 0)
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continue;
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if (sfsp != NULL) {
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struct ultrix_fs_data tem;
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sp = &mp->mnt_stat;
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/*
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* If requested, refresh the fsstat cache.
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*/
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if (mntflags != MNT_WAIT &&
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(error = VFS_STATVFS(mp, sp)) != 0)
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continue;
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/*
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* XXX what does this do? -- cgd
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*/
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sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK;
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if (path == NULL ||
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strcmp(path, sp->f_mntonname) == 0) {
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make_ultrix_mntent(sp, &tem);
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if ((error = copyout((void *)&tem, sfsp,
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sizeof(tem))) != 0) {
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goto bad_freeiter;
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}
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sfsp++;
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count++;
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}
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}
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}
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if (sfsp != NULL && count > maxcount)
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*retval = maxcount;
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else
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*retval = count;
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bad_freeiter:
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mountlist_iterator_destroy(iter);
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bad:
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if (path)
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free(path, M_TEMP);
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return error;
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}
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/* Old-style inet sockaddr (no len field) as passed to Ultrix mount(2) */
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struct osockaddr_in {
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short sin_family;
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u_short sin_port;
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struct in_addr sin_addr;
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char sin_zero[8];
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};
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/*
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* fstype-dependent structure passed to Ultrix mount(2) when
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* mounting NFS filesystems
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*/
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struct ultrix_nfs_args {
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struct osockaddr_in *addr; /* file server address */
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void *fh; /* file handle to be mounted */
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int flags; /* flags */
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int wsize; /* write size in bytes */
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int rsize; /* read size in bytes */
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int timeo; /* initial timeout in .1 secs */
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int retrans; /* times to retry send */
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char *hostname; /* server's hostname */
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char *optstr; /* string of nfs mount options*/
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int gfs_flags; /* gnode flags (ugh) */
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int pg_thresh; /* paging threshold ? */
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};
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/*
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* fstype-dependent structure passed to Ultrix mount(2) when
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* mounting local (4.2bsd FFS) filesystems
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*/
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struct ultrix_ufs_args {
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uint32_t ufs_flags; /* mount flags?*/
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uint32_t ufs_pgthresh; /* minimum file size to page */
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};
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int
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ultrix_sys_mount(struct lwp *l, const struct ultrix_sys_mount_args *uap, register_t *retval)
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{
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int error;
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int otype = SCARG(uap, type);
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char fsname[MFSNAMELEN];
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register_t dummy;
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int nflags;
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nflags = 0;
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/*
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* Translate Ultrix integer mount codes for UFS and NFS to
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* NetBSD fstype strings. Other Ultrix filesystem types
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* (msdos, DEC ods-2) are not supported.
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*/
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/* Translate the Ultrix mount-readonly option parameter */
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if (SCARG(uap, rdonly))
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nflags |= MNT_RDONLY;
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#ifdef later
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parse ultrix mount option string and set NetBSD flags
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#endif
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if (otype == ULTRIX_FSTYPE_NFS) {
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struct ultrix_nfs_args una;
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struct nfs_args na;
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if ((error = copyin(SCARG(uap, data), &una, sizeof(una))) != 0)
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return error;
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#if 0
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/*
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* This is the only syscall boundary the
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* address of the server passes, so do backwards
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* compatibility on 4.3style sockaddrs here.
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*/
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if ((error = copyin(una.addr, &osa, sizeof osa)) != 0) {
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printf("ultrix_mount: nfs copyin osa\n");
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return error;
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}
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sap->sin_family = (u_char)osa.sin_family;
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sap->sin_len = sizeof(*sap);
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/* XXXX teach nfs how to do the above */
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#endif
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na.version = NFS_ARGSVERSION;
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na.addr = (void *)una.addr;
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na.addrlen = sizeof (struct sockaddr_in);
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na.sotype = SOCK_DGRAM;
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na.proto = IPPROTO_UDP;
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na.fh = una.fh;
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na.fhsize = NFSX_V2FH;
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na.flags = /*una.flags;*/ NFSMNT_NOCONN | NFSMNT_RESVPORT;
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na.wsize = una.wsize;
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na.rsize = una.rsize;
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na.timeo = una.timeo;
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na.retrans = una.retrans;
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na.hostname = una.hostname;
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return do_sys_mount(l, "nfs", UIO_SYSSPACE,
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SCARG(uap, special), nflags, &na, UIO_SYSSPACE,
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sizeof na, &dummy);
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}
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/*
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* Translate fstype-dependent mount options from
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* Ultrix format to native.
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*/
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if (otype == ULTRIX_FSTYPE_ULTRIX) {
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/* attempt to mount a native, rather than 4.2bsd, ffs */
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struct ufs_args ua;
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memset(&ua, 0, sizeof(ua));
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ua.fspec = SCARG(uap, special);
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/*
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* Ultrix mount has no MNT_UPDATE flag.
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* Attempt to see if this is the root we're mounting,
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* and if so, set MNT_UPDATE so we can mount / read-write.
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*/
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fsname[0] = 0;
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if ((error = copyinstr(SCARG(uap, dir), fsname,
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sizeof fsname, NULL)) != 0)
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return(error);
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if (strcmp(fsname, "/") == 0) {
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nflags |= MNT_UPDATE;
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printf("COMPAT_ULTRIX: mount with MNT_UPDATE on %s\n",
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fsname);
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}
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return do_sys_mount(l, "ffs", UIO_SYSSPACE,
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SCARG(uap, dir), nflags, &ua, UIO_SYSSPACE, sizeof ua,
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&dummy);
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}
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return EINVAL;
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}
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