nfs/rp_basic/libnfs_basic.c

2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow/*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * CDDL HEADER START
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow *
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * The contents of this file are subject to the terms of the
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * Common Development and Distribution License (the "License").
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * You may not use this file except in compliance with the License.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow *
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * or http://www.opensolaris.org/os/licensing.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * See the License for the specific language governing permissions
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * and limitations under the License.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow *
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * When distributing Covered Code, include this CDDL HEADER in each
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * If applicable, add the following below this CDDL HEADER, with the
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * fields enclosed by brackets "[]" replaced with your own identifying
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * information: Portions Copyright [yyyy] [name of copyright owner]
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow *
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * CDDL HEADER END
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow/*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * Use is subject to license terms.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <stdio.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <unistd.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <strings.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <string.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <sys/types.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <sys/stat.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <sys/errno.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <limits.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <libnvpair.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <dlfcn.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <link.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <rp_plugin.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <fcntl.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <uuid/uuid.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <rpc/types.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <rpc/xdr.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <rpc/auth.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <rpc/clnt.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <rpc/rpc_msg.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <sys/param.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <nfs/nfs4.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include <rpcsvc/nfs4_prot.h>
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#include "ref_subr.h"
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowextern int errno;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#define SERVICE_TYPE    "nfs-basic"
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowchar *nfs_basic_service_type(void);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowboolean_t nfs_basic_supports_svc(const char *);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowint nfs_basic_deref(const char *, const char *, char *, size_t *);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowint nfs_basic_form(const char *, const char *, char *, size_t *);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowstruct rp_plugin_ops rp_plugin_ops = {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    RP_PLUGIN_V1,
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    NULL,           /* rpo_init */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    NULL,           /* rpo_fini */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    nfs_basic_service_type,
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    nfs_basic_supports_svc,
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    nfs_basic_form,
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    nfs_basic_deref
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow};
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow/*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * What service type does this module support?
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowchar *
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlownfs_basic_service_type()
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow{
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    return (SERVICE_TYPE);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow}
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow/*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * Does this module support a particular service type?
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowboolean_t
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlownfs_basic_supports_svc(const char *svc_type)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow{
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (!svc_type)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (0);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    return (!strncasecmp(svc_type, SERVICE_TYPE, strlen(SERVICE_TYPE)));
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow}
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow/*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * Take a string with a set of locations like this:
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow *   host1:/path1 host2:/path2 host3:/path3
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * and convert it to an fs_locations4 for the deref routine.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowstatic fs_locations4 *
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowget_fs_locations(char *buf)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow{
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    fs_locations4 *result = NULL;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    fs_location4 *fsl_array;
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    int i, gothost;
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    int fsl_count = 0, escape = 0, delimiter = 0;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    int len;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    char *p, *sp, *dp, buf2[SYMLINK_MAX];
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (buf == NULL)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (NULL);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#ifdef DEBUG
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    printf("get_fs_locations: input %s\n", buf);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#endif
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    /*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     * Count fs_location entries by counting spaces.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     * Remember that escaped spaces ("\ ") may exist.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     * We mark the location boundaries with null bytes.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     * Variable use:
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     *   escape -   set if we have found a backspace,
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     *      part of either "\ " or "\\"
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     *   delimiter - set if we have found a space and
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     *       used to skip multiple spaces
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    for (sp = buf; sp && *sp; sp++) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        if (*sp == '\\') {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            escape = 1;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            delimiter = 0;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            continue;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        if (*sp == ' ') {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            if (delimiter == 1)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                continue;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            if (escape == 0) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                delimiter = 1;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                fsl_count++;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                *sp = '\0';
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            } else
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                escape = 0;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        } else
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            delimiter = 0;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    len = sp - buf;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    sp--;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (escape == 0 && *sp != '\0')
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        fsl_count++;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#ifdef DEBUG
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    printf("get_fs_locations: fsl_count %d\n", fsl_count);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#endif
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (fsl_count == 0)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        goto out;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    /* Alloc space for everything */
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    result = calloc(1, sizeof (fs_locations4));
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (result == NULL)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        goto out;
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    fsl_array = calloc(fsl_count, sizeof (fs_location4));
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (fsl_array == NULL) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        free(result);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        result = NULL;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        goto out;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    result->locations.locations_len = fsl_count;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    result->locations.locations_val = fsl_array;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    result->fs_root.pathname4_len = 0;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    result->fs_root.pathname4_val = NULL;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    /*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     * Copy input, removing escapes from host:/path/to/my\ files
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow     */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    sp = buf;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    dp = buf2;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    bzero(buf2, sizeof (buf2));
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    i = gothost = 0;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    while ((sp && *sp && (sp - buf < len)) || gothost) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        if (!gothost) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            /* Drop leading spaces */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            if (*sp == ' ') {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                sp++;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                continue;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            /* Look for the rightmost colon for host */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            p = strrchr(sp, ':');
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            if (!p) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#ifdef DEBUG
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                printf("get_fs_locations: skipping %s\n", sp);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#endif
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow                fsl_count--;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                sp += strlen(sp) + 1;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            } else {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                bcopy(sp, dp, p - sp);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                sp = p + 1;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#ifdef DEBUG
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                printf("get_fs_locations: host %s\n", buf2);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#endif
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                fsl_array[i].server.server_len = 1;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                fsl_array[i].server.server_val =
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                    malloc(sizeof (utf8string));
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                if (fsl_array[i].server.server_val == NULL) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                    int j;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                    free(result);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                    result = NULL;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                    for (j = 0; j < i; j++)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                        free(fsl_array[j].
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                            server.server_val);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                    free(fsl_array);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                    goto out;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                str_to_utf8(buf2,
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                    fsl_array[i].server.server_val);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                gothost = 1;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                dp = buf2;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                bzero(buf2, sizeof (buf2));
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            continue;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        /* End of string should mean a pathname */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        if (*sp == '\0' && gothost) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#ifdef DEBUG
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            printf("get_fs_locations: path %s\n", buf2);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#endif
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            (void) make_pathname4(buf2, &fsl_array[i].rootpath);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            i++;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            gothost = 0;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            dp = buf2;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            bzero(buf2, sizeof (buf2));
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            if (sp - buf < len)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow                sp++;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            continue;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        /* Skip a single escape character */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        if (*sp == '\\')
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow            sp++;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        /* Plain char, just copy it */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        *dp++ = *sp++;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    /*
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     * If we're still expecting a path name, we don't have a
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     * server:/path pair and should discard the server and
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     * note that we got fewer locations than expected.
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     */
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    if (gothost) {
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow        fsl_count--;
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow        free(fsl_array[i].server.server_val);
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow        fsl_array[i].server.server_val = NULL;
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow        fsl_array[i].server.server_len = 0;
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    }
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    /*
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     * If we have zero entries, we never got a whole server:/path
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     * pair, and so cannot have anything else allocated.
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     */
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    if (fsl_count <= 0) {
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow        free(result);
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow        free(fsl_array);
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow        return (NULL);
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    }
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    /*
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     * Make sure we reflect the right number of locations.
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow     */
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow    if (fsl_count < result->locations.locations_len)
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow        result->locations.locations_len = fsl_count;
2457156514cfa0601bd17503b32b85ace84513a8Robert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowout:
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    return (result);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow}
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow/*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * Deref function for nfs-basic service type returns an fs_locations4.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowint
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlownfs_basic_deref(const char *svc_type, const char *svc_data, char *buf,
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    size_t *bufsz)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow{
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    int slen, err;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    fs_locations4 *fsl;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    XDR xdr;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if ((!svc_type) || (!svc_data) || (!buf) || (!bufsz) || (*bufsz == 0))
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (EINVAL);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (strcasecmp(svc_type, SERVICE_TYPE))
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (ENOTSUP);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    fsl = get_fs_locations((char *)svc_data);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (fsl == NULL)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (ENOENT);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#ifdef DEBUG
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    printf("nfs_basic_deref: past get_fs_locations()\n");
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#endif
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    slen = xdr_sizeof(xdr_fs_locations4, (void *)fsl);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (slen > *bufsz) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        *bufsz = slen;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        xdr_free(xdr_fs_locations4, (char *)fsl);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (EOVERFLOW);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#ifdef DEBUG
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    printf("nfs_basic_deref: past buffer check\n");
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    print_referral_summary(fsl);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#endif
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    xdrmem_create(&xdr, buf, *bufsz, XDR_ENCODE);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    err = xdr_fs_locations4(&xdr, fsl);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    XDR_DESTROY(&xdr);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    xdr_free(xdr_fs_locations4, (char *)fsl);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (err != TRUE)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (EINVAL);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    *bufsz = slen;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#ifdef DEBUG
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    printf("nfs_basic_deref: past xdr_fs_locations4() and done\n");
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow#endif
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    return (0);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow}
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow/*
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow * Form function for nfs-basic service type.
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow */
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlowint
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlownfs_basic_form(const char *svc_type, const char *svc_data, char *buf,
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    size_t *bufsz)
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow{
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    int slen;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if ((!svc_type) || (!svc_data) || (!buf) || (*bufsz == 0))
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (EINVAL);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (strcmp(svc_type, SERVICE_TYPE))
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (ENOTSUP);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    slen = strlen(svc_data) + 1;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    if (slen > *bufsz) {
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        *bufsz = slen;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow        return (EOVERFLOW);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    }
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    *bufsz = slen;
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    strncpy(buf, svc_data, slen);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow    return (0);
2f172c55ef76964744bc62b4500ece87f3089b4dRobert Thurlow}