initial import of NetBSD tree

1 files changed, 491 insertions, 0 deletions

diff --git a/sys/lib/libsa/nfs.c b/sys/lib/libsa/nfs.c
new file mode 100644
index 00000000000..de16be75325
--- /dev/null
+++ b/sys/lib/libsa/nfs.c
@@ -0,0 +1,491 @@
+/*	$NetBSD: nfs.c,v 1.12 1995/09/23 03:36:08 gwr Exp $	*/
+
+/*-
+ *  Copyright (c) 1993 John Brezak
+ *  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. 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/param.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <string.h>
+
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+
+#include <nfs/rpcv2.h>
+#include <nfs/nfsv2.h>
+#include <nfs/xdr_subs.h>
+
+#include "stand.h"
+#include "net.h"
+#include "netif.h"
+#include "nfs.h"
+#include "rpc.h"
+
+/* Define our own NFS attributes without NQNFS stuff. */
+struct nfsv2_fattrs {
+	n_long	fa_type;
+	n_long	fa_mode;
+	n_long	fa_nlink;
+	n_long	fa_uid;
+	n_long	fa_gid;
+	n_long	fa_size;
+	n_long	fa_blocksize;
+	n_long	fa_rdev;
+	n_long	fa_blocks;
+	n_long	fa_fsid;
+	n_long	fa_fileid;
+	struct nfsv2_time fa_atime;
+	struct nfsv2_time fa_mtime;
+	struct nfsv2_time fa_ctime;
+};
+
+
+struct nfs_read_args {
+	u_char	fh[NFS_FHSIZE];
+	n_long	off;
+	n_long	len;
+	n_long	xxx;			/* XXX what's this for? */
+};
+
+/* Data part of nfs rpc reply (also the largest thing we receive) */
+#define NFSREAD_SIZE 1024
+struct nfs_read_repl {
+	n_long	errno;
+	struct	nfsv2_fattrs fa;
+	n_long	count;
+	u_char	data[NFSREAD_SIZE];
+};
+
+struct nfs_iodesc {
+	struct	iodesc	*iodesc;
+	off_t	off;
+	u_char	fh[NFS_FHSIZE];
+	struct nfsv2_fattrs fa;	/* all in network order */
+};
+
+struct nfs_iodesc nfs_root_node;
+
+
+/*
+ * Fetch the root file handle (call mount daemon)
+ * On error, return non-zero and set errno.
+ */
+int
+nfs_getrootfh(d, path, fhp)
+	register struct iodesc *d;
+	char *path;
+	u_char *fhp;
+{
+	register int len;
+	struct args {
+		n_long	len;
+		char	path[FNAME_SIZE];
+	} *args;
+	struct repl {
+		n_long	errno;
+		u_char	fh[NFS_FHSIZE];
+	} *repl;
+	struct {
+		n_long	h[RPC_HEADER_WORDS];
+		struct args d;
+	} sdata;
+	struct {
+		n_long	h[RPC_HEADER_WORDS];
+		struct repl d;
+	} rdata;
+	size_t cc;
+	
+#ifdef NFS_DEBUG
+	if (debug)
+		printf("nfs_getrootfh: %s\n", path);
+#endif
+
+	args = &sdata.d;
+	repl = &rdata.d;
+
+	bzero(args, sizeof(*args));
+	len = strlen(path);
+	if (len > sizeof(args->path))
+		len = sizeof(args->path);
+	args->len = htonl(len);
+	bcopy(path, args->path, len);
+	len = 4 + roundup(len, 4);
+
+	cc = rpc_call(d, RPCPROG_MNT, RPCMNT_VER1, RPCMNT_MOUNT,
+	    args, len, repl, sizeof(*repl));
+	if (cc == -1) {
+		/* errno was set by rpc_call */
+		return (-1);
+	}
+	if (cc < 4) {
+		errno = EBADRPC;
+		return (-1);
+	}
+	if (repl->errno) {
+		errno = ntohl(repl->errno);
+		return (-1);
+	}
+	bcopy(repl->fh, fhp, sizeof(repl->fh));
+	return (0);
+}
+
+/*
+ * Lookup a file.  Store handle and attributes.
+ * Return zero or error number.
+ */
+int
+nfs_lookupfh(d, name, newfd)
+	struct nfs_iodesc *d;
+	char *name;
+	struct nfs_iodesc *newfd;
+{
+	register int len, rlen;
+	struct args {
+		u_char	fh[NFS_FHSIZE];
+		n_long	len;
+		char	name[FNAME_SIZE];
+	} *args;
+	struct repl {
+		n_long	errno;
+		u_char	fh[NFS_FHSIZE];
+		struct	nfsv2_fattrs fa;
+	} *repl;
+	struct {
+		n_long	h[RPC_HEADER_WORDS];
+		struct args d;
+	} sdata;
+	struct {
+		n_long	h[RPC_HEADER_WORDS];
+		struct repl d;
+	} rdata;
+	ssize_t cc;
+	
+#ifdef NFS_DEBUG
+	if (debug)
+		printf("lookupfh: called\n");
+#endif
+
+	args = &sdata.d;
+	repl = &rdata.d;
+
+	bzero(args, sizeof(*args));
+	bcopy(d->fh, args->fh, sizeof(args->fh));
+	len = strlen(name);
+	if (len > sizeof(args->name))
+		len = sizeof(args->name);
+	bcopy(name, args->name, len);
+	args->len = htonl(len);
+	len = 4 + roundup(len, 4);
+	len += NFS_FHSIZE;
+
+	rlen = sizeof(*repl);
+
+	cc = rpc_call(d->iodesc, NFS_PROG, NFS_VER2, NFSPROC_LOOKUP,
+	    args, len, repl, rlen);
+	if (cc == -1)
+		return (errno);		/* XXX - from rpc_call */
+	if (cc < 4)
+		return (EIO);
+	if (repl->errno) {
+		/* saerrno.h now matches NFS error numbers. */
+		return (ntohl(repl->errno));
+	}
+	bcopy( repl->fh, &newfd->fh, sizeof(newfd->fh));
+	bcopy(&repl->fa, &newfd->fa, sizeof(newfd->fa));
+	return (0);
+}
+
+/*
+ * Read data from a file.
+ * Return transfer count or -1 (and set errno)
+ */
+ssize_t
+nfs_readdata(d, off, addr, len)
+	struct nfs_iodesc *d;
+	off_t off;
+	void *addr;
+	size_t len;
+{
+	struct nfs_read_args *args;
+	struct nfs_read_repl *repl;
+	struct {
+		n_long	h[RPC_HEADER_WORDS];
+		struct nfs_read_args d;
+	} sdata;
+	struct {
+		n_long	h[RPC_HEADER_WORDS];
+		struct nfs_read_repl d;
+	} rdata;
+	size_t cc;
+	long x;
+	int hlen, rlen;
+
+	args = &sdata.d;
+	repl = &rdata.d;
+
+	bcopy(d->fh, args->fh, NFS_FHSIZE);
+	args->off = txdr_unsigned(off);
+	if (len > NFSREAD_SIZE)
+		len = NFSREAD_SIZE;
+	args->len = txdr_unsigned(len);
+	args->xxx = txdr_unsigned(0);
+	hlen = sizeof(*repl) - NFSREAD_SIZE;
+
+	cc = rpc_call(d->iodesc, NFS_PROG, NFS_VER2, NFSPROC_READ,
+	    args, sizeof(*args),
+	    repl, sizeof(*repl));
+	if (cc == -1) {
+		/* errno was already set by rpc_call */
+		return (-1);
+	}
+	if (cc < hlen) {
+		errno = EBADRPC;
+		return (-1);
+	}
+	if (repl->errno) {
+		errno = ntohl(repl->errno);
+		return (-1);
+	}
+	rlen = cc - hlen;
+	x = ntohl(repl->count);
+	if (rlen < x) {
+		printf("nfsread: short packet, %d < %d\n", rlen, x);
+		errno = EBADRPC;
+		return(-1);
+	}
+	bcopy(repl->data, addr, x);
+	return (x);
+}
+
+/*
+ * nfs_mount - mount this nfs filesystem to a host
+ * On error, return non-zero and set errno.
+ */
+int
+nfs_mount(sock, ip, path)
+	int sock;
+	struct in_addr ip;
+	char *path;
+{
+	struct iodesc *desc;
+	struct nfsv2_fattrs *fa;
+
+	if (!(desc = socktodesc(sock))) {
+		errno = EINVAL;
+		return(-1);
+	}
+
+	/* Bind to a reserved port. */
+	desc->myport = htons(--rpc_port);
+	desc->destip = ip;
+	if (nfs_getrootfh(desc, path, nfs_root_node.fh))
+		return (-1);
+	nfs_root_node.iodesc = desc;
+	/* Fake up attributes for the root dir. */
+	fa = &nfs_root_node.fa;
+	fa->fa_type  = htonl(NFDIR);
+	fa->fa_mode  = htonl(0755);
+	fa->fa_nlink = htonl(2);
+
+#ifdef NFS_DEBUG
+	if (debug)
+		printf("nfs_mount: got fh for %s\n", path);
+#endif
+
+	return(0);
+}
+
+/*
+ * Open a file.
+ * return zero or error number
+ */
+int
+nfs_open(path, f)
+	char *path;
+	struct open_file *f;
+{
+	struct nfs_iodesc *newfd;
+	int error = 0;
+
+#ifdef NFS_DEBUG
+ 	if (debug)
+ 	    printf("nfs_open: %s\n", path);
+#endif
+	if (nfs_root_node.iodesc == NULL) {
+		printf("nfs_open: must mount first.\n");
+		return (ENXIO);
+	}
+
+	/* allocate file system specific data structure */
+	newfd = alloc(sizeof(*newfd));
+	newfd->iodesc = nfs_root_node.iodesc;
+	newfd->off = 0;
+
+	/* lookup a file handle */
+	error = nfs_lookupfh(&nfs_root_node, path, newfd);
+	if (!error) {
+		f->f_fsdata = (void *)newfd;
+		return (0);
+	}
+
+#ifdef NFS_DEBUG
+	if (debug)
+		printf("nfs_open: %s lookupfh failed: %s\n",
+			path, strerror(error));
+#endif
+	free(newfd, sizeof(*newfd));
+	return (error);
+}
+
+int
+nfs_close(f)
+	struct open_file *f;
+{
+	register struct nfs_iodesc *fp = (struct nfs_iodesc *)f->f_fsdata;
+
+#ifdef NFS_DEBUG
+	if (debug)
+		printf("nfs_close: fp=0x%x\n", fp);
+#endif
+
+	if (fp)
+		free(fp, sizeof(struct nfs_iodesc));
+	f->f_fsdata = (void *)0;
+	
+	return (0);
+}
+
+/*
+ * read a portion of a file
+ */
+int
+nfs_read(f, buf, size, resid)
+	struct open_file *f;
+	void *buf;
+	size_t size;
+	size_t *resid;	/* out */
+{
+	register struct nfs_iodesc *fp = (struct nfs_iodesc *)f->f_fsdata;
+	register ssize_t cc;
+	register char *addr = buf;
+	
+#ifdef NFS_DEBUG
+	if (debug)
+		printf("nfs_read: size=%d off=%d\n", size, (int)fp->off);
+#endif
+	while ((int)size > 0) {
+		twiddle();
+		cc = nfs_readdata(fp, fp->off, (void *)addr, size);
+		/* XXX maybe should retry on certain errors */
+		if (cc == -1) {
+#ifdef NFS_DEBUG
+			if (debug)
+				printf("nfs_read: read: %s", strerror(errno));
+#endif
+			return (errno);	/* XXX - from nfs_readdata */
+		}
+		if (cc == 0) {
+			if (debug)
+				printf("nfs_read: hit EOF unexpectantly");
+			goto ret;
+		}
+		fp->off += cc;
+		addr += cc;
+		size -= cc;
+	}
+ret:
+	if (resid)
+		*resid = size;
+
+	return (0);
+}
+
+/*
+ * Not implemented.
+ */
+int
+nfs_write(f, buf, size, resid)
+	struct open_file *f;
+	void *buf;
+	size_t size;
+	size_t *resid;	/* out */
+{
+	return (EROFS);
+}
+
+off_t
+nfs_seek(f, offset, where)
+	struct open_file *f;
+	off_t offset;
+	int where;
+{
+	register struct nfs_iodesc *d = (struct nfs_iodesc *)f->f_fsdata;
+	n_long size = ntohl(d->fa.fa_size);
+
+	switch (where) {
+	case SEEK_SET:
+		d->off = offset;
+		break;
+	case SEEK_CUR:
+		d->off += offset;
+		break;
+	case SEEK_END:
+		d->off = size - offset;
+		break;
+	default:
+		return (-1);
+	}
+
+	return (d->off);
+}
+
+/* NFNON=0, NFREG=1, NFDIR=2, NFBLK=3, NFCHR=4, NFLNK=5 */
+int nfs_stat_types[8] = {
+	0, S_IFREG, S_IFDIR, S_IFBLK, S_IFCHR, S_IFLNK, 0 };
+
+int
+nfs_stat(f, sb)
+	struct open_file *f;
+	struct stat *sb;
+{
+	struct nfs_iodesc *fp = (struct nfs_iodesc *)f->f_fsdata;
+	register n_long ftype, mode;
+
+	ftype = ntohl(fp->fa.fa_type);
+	mode  = ntohl(fp->fa.fa_mode);
+	mode |= nfs_stat_types[ftype & 7];
+
+	sb->st_mode  = mode;
+	sb->st_nlink = ntohl(fp->fa.fa_nlink);
+	sb->st_uid   = ntohl(fp->fa.fa_uid);
+	sb->st_gid   = ntohl(fp->fa.fa_gid);
+	sb->st_size  = ntohl(fp->fa.fa_size);
+
+	return (0);
+}