nfs_xdr.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

}

/*
 * Arguments to readdir
 */
bool_t
xdr_rddirargs(xdrs, rda)
	XDR *xdrs;
	struct nfsrddirargs *rda;
{
	if (xdr_fhandle(xdrs, &rda->rda_fh) &&
	    xdr_u_long(xdrs, &rda->rda_offset) &&
	    xdr_u_long(xdrs, &rda->rda_count) ) {
#ifdef NFSDEBUG
		dprint(nfsdebug, 6,
		    "xdr_rddirargs: %s fh %o %d, off %d, cnt %d\n",
		    xdropnames[(int)xdrs->x_op],
		    rda->rda_fh.fh_fsid, rda->rda_fh.fh_fno, rda->rda_offset,
		    rda->rda_count);
#endif
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_rddirargs: %s FAILED\n",
	    xdropnames[(int)xdrs->x_op]);
#endif
	return (FALSE);
}

/*
 * Directory read reply:
 * union (enum status) {
 *	NFS_OK: entlist;
 *		boolean eof;
 *	default:
 * }
 *
 * Directory entries
 *	struct  direct {
 *		u_long  d_fileno;	       * inode number of entry *
 *		u_short d_reclen;	       * length of this record *
 *		u_short d_namlen;	       * length of string in d_name *
 *		char    d_name[MAXNAMLEN + 1];  * name no longer than this *
 *	};
 * are on the wire as:
 * union entlist (boolean valid) {
 * 	TRUE: struct dirent;
 *	      u_long nxtoffset;
 * 	      union entlist;
 *	FALSE:
 * }
 * where dirent is:
 * 	struct dirent {
 *		u_long	de_fid;
 *		string	de_name<NFS_MAXNAMELEN>;
 *	}
 */

#define	nextdp(dp)	((struct direct *)((int)(dp) + (dp)->d_reclen))
#undef DIRSIZ
#define DIRSIZ(dp)	(sizeof(struct direct) - MAXNAMLEN + (dp)->d_namlen)

/*
 * ENCODE ONLY
 */
bool_t
xdr_putrddirres(xdrs, rd)
	XDR *xdrs;
	struct nfsrddirres *rd;
{
	register struct direct *dp;
	register int size;
	u_long offset;
	char *name;
	u_int namlen;
	int xdrpos;
	bool_t true = TRUE;
	bool_t false = FALSE;

#ifdef NFSDEBUG
	dprint(nfsdebug, 6, "xdr_putrddirres: %s size %d offset %d\n",
	    xdropnames[(int)xdrs->x_op], rd->rd_size, rd->rd_offset);
#endif
	if (xdrs->x_op != XDR_ENCODE) {
		return (FALSE);
	}
	if (!xdr_enum(xdrs, (enum_t *)&rd->rd_status)) {
		return (FALSE);
	}
	if (rd->rd_status != NFS_OK) {
		return (TRUE);
	}

	xdrpos = XDR_GETPOS(xdrs);
	for (offset = rd->rd_offset, size = rd->rd_size, dp = rd->rd_entries;
	     size > 0;
	     size -= dp->d_reclen, dp = nextdp(dp) ) {
		if (dp->d_reclen == 0 || DIRSIZ(dp) > dp->d_reclen) {
#ifdef NFSDEBUG
			dprint(nfsdebug, 2, "xdr_putrddirres: bad directory\n");
#endif
			return (FALSE);
		}
		offset += dp->d_reclen;

#ifdef NFSDEBUG
		dprint(nfsdebug, 10,
		    "xdr_putrddirres: entry %d %s(%d) %d %d %d %d\n",
		    dp->d_fileno, dp->d_name, dp->d_namlen, offset,
		    dp->d_reclen, XDR_GETPOS(xdrs), size);
#endif
		if (dp->d_fileno == 0) {
			continue;
		}
		name = dp->d_name;
		namlen = dp->d_namlen;
		if (!xdr_bool(xdrs, &true) ||
		    !xdr_u_long(xdrs, &dp->d_fileno) ||
		    !xdr_bytes(xdrs, &name, &namlen,
			NFS_MAXNAMLEN) ||
		    !xdr_u_long(xdrs, &offset) ) {

				return (FALSE);
		}

		if (XDR_GETPOS(xdrs) - xdrpos >= rd->rd_bufallocsize) {
			rd->rd_eof = FALSE;
			break;
		}
	}
	if (!xdr_bool(xdrs, &false)) {
		return (FALSE);
	}
	if (!xdr_bool(xdrs, &rd->rd_eof)) {
		return (FALSE);
	}
	return (TRUE);
}

/* there was an error in calculating the record length fo each directory */
#define	roundtoint(x)	(((x) + (sizeof(int) - 1)) & ~(sizeof(int) - 1))
#define	reclen(dp)	roundtoint(((dp)->d_namlen + 1 + sizeof(u_long) +\
				2 * sizeof(u_short)))

/*
 * DECODE ONLY
 */
bool_t
xdr_getrddirres(xdrs, rd)
	XDR *xdrs;
	struct nfsrddirres *rd;
{
	register struct direct *dp;
	register int size;
	bool_t valid;
	u_long offset = (u_long)-1;

	if (!xdr_enum(xdrs, (enum_t *)&rd->rd_status)) {
#ifdef NFSDEBUG
	dprint(nfsdebug, 6, "getrddires failed doing status\n");
#endif
		return (FALSE);
	}
	if (rd->rd_status != NFS_OK) {
		return (TRUE);
	}

#ifdef NFSDEBUG
	dprint(nfsdebug, 6, "xdr_getrddirres: %s size %d\n",
	    xdropnames[(int)xdrs->x_op], rd->rd_size);
#endif
	size = rd->rd_size;
	dp = rd->rd_entries;
	for (;;) {
		if (!xdr_bool(xdrs, &valid)) {
#ifdef NFSDEBUG
	dprint(nfsdebug, 6, "getrddires failed doing valid\n");
#endif
			return (FALSE);
		}

		if (valid) {

#ifdef NFSDEBUG
			if (!xdr_u_long(xdrs, &dp->d_fileno)) {
				printf("entry err on fileno\n");
				return (FALSE);
			}
			if (!xdr_u_short(xdrs, &dp->d_namlen)) {
				printf("entry error on namlen\n");
				return (FALSE);
			}
			if (reclen(dp) > size) {
printf("entry error on reclen -- reclen %d  size %d\n", reclen(dp), size);
				return (FALSE);
			}
			if (!xdr_opaque(xdrs, dp->d_name,
				(u_int)dp->d_namlen)) {
				printf("entry error on name\n");
				return (FALSE);
			}
			if (!xdr_u_long(xdrs, &offset) ) {
				printf("entry error on offset\n");
				return (FALSE);
			}
#else NFSDEBUG
			if (!xdr_u_long(xdrs, &dp->d_fileno) ||
			    !xdr_u_short(xdrs, &dp->d_namlen) ||
			    (reclen(dp) > size) ||
			    !xdr_opaque(xdrs, dp->d_name, (u_int)dp->d_namlen)||
			    !xdr_u_long(xdrs, &offset) ) {
				return (FALSE);
			}
#endif NFSDEBUG

			dp->d_reclen = reclen(dp);
			dp->d_name[dp->d_namlen] = '\0';
#ifdef NFSDEBUG
			dprint(nfsdebug, 10,
			    "xdr_getrddirres: entry %d %s(%d) %d %d\n",
			    dp->d_fileno, dp->d_name, dp->d_namlen,
			    dp->d_reclen, offset);
#endif NFSDEBUG
		} else {
			break;
		}
		size -= dp->d_reclen;
		if (size <= 0) {
			return (FALSE);
		}
		dp = nextdp(dp);
	}
	if (!xdr_bool(xdrs, &rd->rd_eof)) {
		return (FALSE);
	}
	rd->rd_size = (int)dp - (int)(rd->rd_entries);
	rd->rd_offset = offset;
#ifdef NFSDEBUG
	dprint(nfsdebug, 6,
	    "xdr_getrddirres: returning size %d offset %d eof %d\n",
	    rd->rd_size, rd->rd_offset, rd->rd_eof);
#endif
	return (TRUE);
}

/*
 * Arguments for directory operations
 */
bool_t
xdr_diropargs(xdrs, da)
	XDR *xdrs;
	struct nfsdiropargs *da;
{

	if (xdr_fhandle(xdrs, &da->da_fhandle) &&
	    xdr_string(xdrs, &da->da_name, NFS_MAXNAMLEN) ) {
#ifdef NFSDEBUG
		dprint(nfsdebug, 6, "xdr_diropargs: %s %o %d '%s'\n",
		    xdropnames[(int)xdrs->x_op], da->da_fhandle.fh_fsid,
		    da->da_fhandle.fh_fno, da->da_name);
#endif
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_diropargs: FAILED\n");
#endif
	return (FALSE);
}

/*
 * NFS_OK part of directory operation result
 */
bool_t
xdr_drok(xdrs, drok)
	XDR *xdrs;
	struct nfsdrok *drok;
{

	if (xdr_fhandle(xdrs, &drok->drok_fhandle) &&
	    xdr_fattr(xdrs, &drok->drok_attr) ) {
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_drok: FAILED\n");
#endif
	return (FALSE);
}

struct xdr_discrim diropres_discrim[2] = {
	{ (int)NFS_OK, xdr_drok },
	{ __dontcare__, NULL_xdrproc_t }
};

/*
 * Results from directory operation 
 */
bool_t
xdr_diropres(xdrs, dr)
	XDR *xdrs;
	struct nfsdiropres *dr;
{

	if (xdr_union(xdrs, (enum_t *)&(dr->dr_status),
	      (caddr_t)&(dr->dr_drok), diropres_discrim, xdr_void) ) {
#ifdef NFSDEBUG
		dprint(nfsdebug, 6, "xdr_diropres: %s stat %d\n",
		    xdropnames[(int)xdrs->x_op], dr->dr_status);
#endif
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_diropres: FAILED\n");
#endif
	return (FALSE);
}

/*
 * Time structure
 */
bool_t
xdr_timeval(xdrs, tv)
	XDR *xdrs;
	struct timeval *tv;
{

	if (xdr_long(xdrs, &tv->tv_sec) &&
	    xdr_long(xdrs, &tv->tv_usec) ) {
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_timeval: FAILED\n");
#endif
	return (FALSE);
}

/*
 * arguments to setattr
 */
bool_t
xdr_saargs(xdrs, argp)
	XDR *xdrs;
	struct nfssaargs *argp;
{

	if (xdr_fhandle(xdrs, &argp->saa_fh) &&
	    xdr_sattr(xdrs, &argp->saa_sa) ) {
#ifdef NFSDEBUG
		dprint(nfsdebug, 6, "xdr_saargs: %s %o %d\n",
		    xdropnames[(int)xdrs->x_op], argp->saa_fh.fh_fsid,
		    argp->saa_fh.fh_fno);
#endif
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_saargs: FAILED\n");
#endif
	return (FALSE);
}

/*
 * arguments to create and mkdir
 */
bool_t
xdr_creatargs(xdrs, argp)
	XDR *xdrs;
	struct nfscreatargs *argp;
{

	if (xdr_diropargs(xdrs, &argp->ca_da) &&
	    xdr_sattr(xdrs, &argp->ca_sa) ) {
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_creatargs: FAILED\n");
#endif
	return (FALSE);
}

/*
 * arguments to link
 */
bool_t
xdr_linkargs(xdrs, argp)
	XDR *xdrs;
	struct nfslinkargs *argp;
{

	if (xdr_fhandle(xdrs, &argp->la_from) &&
	    xdr_diropargs(xdrs, &argp->la_to) ) {
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_linkargs: FAILED\n");
#endif
	return (FALSE);
}

/*
 * arguments to rename
 */
bool_t
xdr_rnmargs(xdrs, argp)
	XDR *xdrs;
	struct nfsrnmargs *argp;
{

	if (xdr_diropargs(xdrs, &argp->rna_from) &&
	    xdr_diropargs(xdrs, &argp->rna_to) ) {
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_rnmargs: FAILED\n");
#endif
	return (FALSE);
}

/*
 * arguments to symlink
 */
bool_t
xdr_slargs(xdrs, argp)
	XDR *xdrs;
	struct nfsslargs *argp;
{

	if (xdr_diropargs(xdrs, &argp->sla_from) &&
	    xdr_string(xdrs, &argp->sla_tnm, (u_int)MAXPATHLEN) &&
	    xdr_sattr(xdrs, &argp->sla_sa) ) {
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_slargs: FAILED\n");
#endif
	return (FALSE);
}

/*
 * NFS_OK part of statfs operation
 */
xdr_fsok(xdrs, fsok)
	XDR *xdrs;
	struct nfsstatfsok *fsok;
{
#ifdef GFSDEBUG
	if(GFS[14])
		printf("xdr_fsok: called\n");
#endif
	if (xdr_long(xdrs, (long *)&fsok->fsok_tsize) &&
	    xdr_long(xdrs, (long *)&fsok->fsok_bsize) &&
	    xdr_long(xdrs, (long *)&fsok->fsok_blocks) &&
	    xdr_long(xdrs, (long *)&fsok->fsok_bfree) &&
	    xdr_long(xdrs, (long *)&fsok->fsok_bavail) ) {
#ifdef NFSDEBUG
		dprint(nfsdebug, 6,
		    "xdr_fsok: %s tsz %d bsz %d blks %d bfree %d bavail %d\n",
		    xdropnames[(int)xdrs->x_op], fsok->fsok_tsize,
		    fsok->fsok_bsize, fsok->fsok_blocks, fsok->fsok_bfree,
		    fsok->fsok_bavail);
#endif
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_fsok: FAILED\n");
#endif
	return (FALSE);
}

struct xdr_discrim statfs_discrim[2] = {
	{ (int)NFS_OK, xdr_fsok },
	{ __dontcare__, NULL_xdrproc_t }
};

/*
 * Results of statfs operation
 */
xdr_statfs(xdrs, fs)
	XDR *xdrs;
	struct nfsstatfs *fs;
{
#ifdef NFSDEBUG
	dprint(nfsdebug, 4, "xdr_statfs: were here\n");
#endif
	if (xdr_union(xdrs, (enum_t *)&(fs->fs_status),
	      (caddr_t)&(fs->fs_fsok), statfs_discrim, xdr_void) ) {
#ifdef NFSDEBUG
		dprint(nfsdebug, 6, "xdr_statfs: %s stat %d\n",
		    xdropnames[(int)xdrs->x_op], fs->fs_status);
#endif
		return (TRUE);
	}
#ifdef NFSDEBUG
	dprint(nfsdebug, 2, "xdr_statfs: FAILED\n");
#endif
	return (FALSE);
}