613 lines
13 KiB
C
613 lines
13 KiB
C
/* $NetBSD: prop_kern.c,v 1.17 2011/09/30 22:08:18 jym Exp $ */
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/*-
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* Copyright (c) 2006, 2009 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jason R. Thorpe.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if defined(__NetBSD__)
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <prop/proplib.h>
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#if !defined(_KERNEL) && !defined(_STANDALONE)
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#include <sys/mman.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#ifdef RUMP_ACTION
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#include <rump/rump_syscalls.h>
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#define ioctl(a,b,c) rump_sys_ioctl(a,b,c)
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#endif
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static int
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_prop_object_externalize_to_pref(prop_object_t obj, struct plistref *pref,
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char **bufp)
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{
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char *buf;
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switch (prop_object_type(obj)) {
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case PROP_TYPE_DICTIONARY:
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buf = prop_dictionary_externalize(obj);
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break;
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case PROP_TYPE_ARRAY:
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buf = prop_array_externalize(obj);
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break;
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default:
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return (ENOTSUP);
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}
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if (buf == NULL) {
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/* Assume we ran out of memory. */
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return (ENOMEM);
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}
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pref->pref_plist = buf;
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pref->pref_len = strlen(buf) + 1;
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*bufp = buf;
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return (0);
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}
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bool
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prop_array_externalize_to_pref(prop_array_t array, struct plistref *prefp)
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{
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char *buf;
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int rv;
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rv = _prop_object_externalize_to_pref(array, prefp, &buf);
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if (rv != 0)
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errno = rv; /* pass up error value in errno */
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return (rv == 0);
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}
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/*
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* prop_array_externalize_to_pref --
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* Externalize an array into a plistref for sending to the kernel.
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*/
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int
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prop_array_send_syscall(prop_array_t array, struct plistref *prefp)
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{
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if (prop_array_externalize_to_pref(array, prefp))
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return 0;
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else
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return errno;
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}
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bool
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prop_dictionary_externalize_to_pref(prop_dictionary_t dict,
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struct plistref *prefp)
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{
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char *buf;
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int rv;
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rv = _prop_object_externalize_to_pref(dict, prefp, &buf);
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if (rv != 0)
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errno = rv; /* pass up error value in errno */
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return (rv == 0);
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}
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/*
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* prop_dictionary_externalize_to_pref --
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* Externalize an dictionary into a plistref for sending to the kernel.
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*/
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int
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prop_dictionary_send_syscall(prop_dictionary_t dict,
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struct plistref *prefp)
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{
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if (prop_dictionary_externalize_to_pref(dict, prefp))
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return 0;
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else
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return errno;
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}
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static int
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_prop_object_send_ioctl(prop_object_t obj, int fd, unsigned long cmd)
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{
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struct plistref pref;
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char *buf;
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int error;
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error = _prop_object_externalize_to_pref(obj, &pref, &buf);
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if (error)
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return (error);
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if (ioctl(fd, cmd, &pref) == -1)
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error = errno;
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else
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error = 0;
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free(buf);
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return (error);
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}
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/*
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* prop_array_send_ioctl --
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* Send an array to the kernel using the specified ioctl.
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*/
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int
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prop_array_send_ioctl(prop_array_t array, int fd, unsigned long cmd)
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{
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int rv;
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rv = _prop_object_send_ioctl(array, fd, cmd);
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if (rv != 0) {
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errno = rv; /* pass up error value in errno */
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return rv;
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} else
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return 0;
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}
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/*
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* prop_dictionary_send_ioctl --
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* Send a dictionary to the kernel using the specified ioctl.
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*/
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int
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prop_dictionary_send_ioctl(prop_dictionary_t dict, int fd, unsigned long cmd)
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{
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int rv;
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rv = _prop_object_send_ioctl(dict, fd, cmd);
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if (rv != 0) {
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errno = rv; /* pass up error value in errno */
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return rv;
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} else
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return 0;
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}
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static int
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_prop_object_internalize_from_pref(const struct plistref *pref,
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prop_type_t type, prop_object_t *objp)
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{
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prop_object_t obj = NULL;
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char *buf;
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int error = 0;
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if (pref->pref_len == 0) {
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/*
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* This should never happen; we should always get the XML
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* for an empty dictionary if it's really empty.
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*/
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error = EIO;
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goto out;
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} else {
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buf = pref->pref_plist;
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buf[pref->pref_len - 1] = '\0'; /* extra insurance */
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switch (type) {
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case PROP_TYPE_DICTIONARY:
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obj = prop_dictionary_internalize(buf);
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break;
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case PROP_TYPE_ARRAY:
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obj = prop_array_internalize(buf);
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break;
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default:
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error = ENOTSUP;
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}
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(void) munmap(buf, pref->pref_len);
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if (obj == NULL && error == 0)
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error = EIO;
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}
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out:
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if (error == 0)
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*objp = obj;
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return (error);
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}
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/*
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* prop_array_internalize_from_pref --
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* Internalize a pref into a prop_array_t object.
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*/
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bool
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prop_array_internalize_from_pref(const struct plistref *prefp,
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prop_array_t *arrayp)
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{
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int rv;
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rv = _prop_object_internalize_from_pref(prefp, PROP_TYPE_ARRAY,
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(prop_object_t *)arrayp);
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if (rv != 0)
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errno = rv; /* pass up error value in errno */
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return (rv == 0);
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}
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/*
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* prop_array_recv_syscall --
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* Internalize an array received from the kernel as pref.
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*/
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int
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prop_array_recv_syscall(const struct plistref *prefp,
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prop_array_t *arrayp)
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{
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if (prop_array_internalize_from_pref(prefp, arrayp))
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return 0;
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else
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return errno;
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}
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/*
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* prop_dictionary_internalize_from_pref --
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* Internalize a pref into a prop_dictionary_t object.
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*/
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bool
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prop_dictionary_internalize_from_pref(const struct plistref *prefp,
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prop_dictionary_t *dictp)
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{
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int rv;
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rv = _prop_object_internalize_from_pref(prefp, PROP_TYPE_DICTIONARY,
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(prop_object_t *)dictp);
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if (rv != 0)
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errno = rv; /* pass up error value in errno */
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return (rv == 0);
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}
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/*
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* prop_dictionary_recv_syscall --
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* Internalize a dictionary received from the kernel as pref.
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*/
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int
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prop_dictionary_recv_syscall(const struct plistref *prefp,
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prop_dictionary_t *dictp)
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{
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if (prop_dictionary_internalize_from_pref(prefp, dictp))
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return 0;
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else
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return errno;
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}
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/*
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* prop_array_recv_ioctl --
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* Receive an array from the kernel using the specified ioctl.
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*/
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int
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prop_array_recv_ioctl(int fd, unsigned long cmd, prop_array_t *arrayp)
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{
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int rv;
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struct plistref pref;
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rv = ioctl(fd, cmd, &pref);
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if (rv == -1)
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return errno;
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rv = _prop_object_internalize_from_pref(&pref, PROP_TYPE_ARRAY,
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(prop_object_t *)arrayp);
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if (rv != 0) {
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errno = rv; /* pass up error value in errno */
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return rv;
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} else
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return 0;
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}
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/*
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* prop_dictionary_recv_ioctl --
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* Receive a dictionary from the kernel using the specified ioctl.
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*/
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int
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prop_dictionary_recv_ioctl(int fd, unsigned long cmd, prop_dictionary_t *dictp)
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{
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int rv;
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struct plistref pref;
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rv = ioctl(fd, cmd, &pref);
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if (rv == -1)
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return errno;
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rv = _prop_object_internalize_from_pref(&pref, PROP_TYPE_DICTIONARY,
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(prop_object_t *)dictp);
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if (rv != 0) {
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errno = rv; /* pass up error value in errno */
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return rv;
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} else
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return 0;
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}
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/*
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* prop_dictionary_sendrecv_ioctl --
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* Combination send/receive a dictionary to/from the kernel using
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* the specified ioctl.
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*/
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int
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prop_dictionary_sendrecv_ioctl(prop_dictionary_t dict, int fd,
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unsigned long cmd, prop_dictionary_t *dictp)
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{
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struct plistref pref;
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char *buf;
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int error;
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error = _prop_object_externalize_to_pref(dict, &pref, &buf);
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if (error != 0) {
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errno = error;
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return error;
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}
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if (ioctl(fd, cmd, &pref) == -1)
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error = errno;
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else
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error = 0;
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free(buf);
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if (error != 0)
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return error;
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error = _prop_object_internalize_from_pref(&pref, PROP_TYPE_DICTIONARY,
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(prop_object_t *)dictp);
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if (error != 0) {
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errno = error; /* pass up error value in errno */
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return error;
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} else
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return 0;
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}
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#endif /* !_KERNEL && !_STANDALONE */
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#if defined(_KERNEL)
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/errno.h>
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#include <sys/malloc.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/resource.h>
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#include <sys/pool.h>
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#include <uvm/uvm.h>
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#include "prop_object_impl.h"
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/* Arbitrary limit ioctl input to 64KB */
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unsigned int prop_object_copyin_limit = 65536;
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/* initialize proplib for use in the kernel */
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void
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prop_kern_init(void)
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{
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__link_set_decl(prop_linkpools, struct prop_pool_init);
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struct prop_pool_init * const *pi;
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__link_set_foreach(pi, prop_linkpools)
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pool_init((*pi)->pp, (*pi)->size, 0, 0, 0, (*pi)->wchan,
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&pool_allocator_nointr, IPL_NONE);
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}
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static int
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_prop_object_copyin(const struct plistref *pref, const prop_type_t type,
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prop_object_t *objp)
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{
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prop_object_t obj = NULL;
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char *buf;
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int error;
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/*
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* Allocate an extra byte so we can guarantee NUL-termination.
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*
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* Allow malloc to fail in case pmap would be exhausted.
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*/
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buf = malloc(pref->pref_len + 1, M_TEMP, M_WAITOK | M_CANFAIL);
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if (buf == NULL)
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return (ENOMEM);
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error = copyin(pref->pref_plist, buf, pref->pref_len);
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if (error) {
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free(buf, M_TEMP);
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return (error);
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}
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buf[pref->pref_len] = '\0';
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switch (type) {
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case PROP_TYPE_ARRAY:
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obj = prop_array_internalize(buf);
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break;
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case PROP_TYPE_DICTIONARY:
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obj = prop_dictionary_internalize(buf);
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break;
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default:
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error = ENOTSUP;
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}
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free(buf, M_TEMP);
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if (obj == NULL) {
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if (error == 0)
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error = EIO;
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} else {
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*objp = obj;
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}
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return (error);
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}
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static int
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_prop_object_copyin_ioctl(const struct plistref *pref, const prop_type_t type,
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const u_long cmd, prop_object_t *objp)
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{
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if ((cmd & IOC_IN) == 0)
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return (EFAULT);
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return _prop_object_copyin(pref, type, objp);
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}
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/*
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* prop_array_copyin --
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* Copy in an array passed as a syscall arg.
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*/
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int
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prop_array_copyin(const struct plistref *pref, prop_array_t *arrayp)
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{
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return (_prop_object_copyin(pref, PROP_TYPE_ARRAY,
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(prop_object_t *)arrayp));
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}
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/*
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* prop_dictionary_copyin --
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* Copy in a dictionary passed as a syscall arg.
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*/
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int
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prop_dictionary_copyin(const struct plistref *pref, prop_dictionary_t *dictp)
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{
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return (_prop_object_copyin(pref, PROP_TYPE_DICTIONARY,
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(prop_object_t *)dictp));
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}
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/*
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* prop_array_copyin_ioctl --
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* Copy in an array send with an ioctl.
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*/
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int
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prop_array_copyin_ioctl(const struct plistref *pref, const u_long cmd,
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prop_array_t *arrayp)
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{
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return (_prop_object_copyin_ioctl(pref, PROP_TYPE_ARRAY,
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cmd, (prop_object_t *)arrayp));
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}
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/*
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* prop_dictionary_copyin_ioctl --
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* Copy in a dictionary sent with an ioctl.
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*/
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int
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prop_dictionary_copyin_ioctl(const struct plistref *pref, const u_long cmd,
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prop_dictionary_t *dictp)
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{
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return (_prop_object_copyin_ioctl(pref, PROP_TYPE_DICTIONARY,
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cmd, (prop_object_t *)dictp));
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}
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static int
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_prop_object_copyout(struct plistref *pref, prop_object_t obj)
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{
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struct lwp *l = curlwp; /* XXX */
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struct proc *p = l->l_proc;
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char *buf;
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size_t len, rlen;
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int error = 0;
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vaddr_t uaddr;
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switch (prop_object_type(obj)) {
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case PROP_TYPE_ARRAY:
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buf = prop_array_externalize(obj);
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break;
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case PROP_TYPE_DICTIONARY:
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buf = prop_dictionary_externalize(obj);
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break;
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default:
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return (ENOTSUP);
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}
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if (buf == NULL)
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return (ENOMEM);
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len = strlen(buf) + 1;
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rlen = round_page(len);
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/*
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* See sys_mmap() in sys/uvm/uvm_mmap.c.
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* Let's act as if we were calling mmap(0, ...)
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*/
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uaddr = p->p_emul->e_vm_default_addr(p,
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(vaddr_t)p->p_vmspace->vm_daddr, rlen);
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error = uvm_mmap(&p->p_vmspace->vm_map,
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&uaddr, rlen,
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VM_PROT_READ|VM_PROT_WRITE,
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VM_PROT_READ|VM_PROT_WRITE,
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MAP_PRIVATE|MAP_ANON,
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NULL, 0,
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p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur);
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if (error == 0) {
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error = copyout(buf, (char *)uaddr, len);
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if (error == 0) {
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pref->pref_plist = (char *)uaddr;
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pref->pref_len = len;
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}
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}
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free(buf, M_TEMP);
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return (error);
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}
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/*
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* prop_array_copyout --
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* Copy out an array to a syscall arg.
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*/
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int
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prop_array_copyout(struct plistref *pref, prop_array_t array)
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{
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return (_prop_object_copyout(pref, array));
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|
}
|
|
|
|
/*
|
|
* prop_dictionary_copyout --
|
|
* Copy out a dictionary to a syscall arg.
|
|
*/
|
|
int
|
|
prop_dictionary_copyout(struct plistref *pref, prop_dictionary_t dict)
|
|
{
|
|
return (_prop_object_copyout(pref, dict));
|
|
}
|
|
|
|
static int
|
|
_prop_object_copyout_ioctl(struct plistref *pref, const u_long cmd,
|
|
prop_object_t obj)
|
|
{
|
|
if ((cmd & IOC_OUT) == 0)
|
|
return (EFAULT);
|
|
return _prop_object_copyout(pref, obj);
|
|
}
|
|
|
|
|
|
/*
|
|
* prop_array_copyout_ioctl --
|
|
* Copy out an array being received with an ioctl.
|
|
*/
|
|
int
|
|
prop_array_copyout_ioctl(struct plistref *pref, const u_long cmd,
|
|
prop_array_t array)
|
|
{
|
|
return (_prop_object_copyout_ioctl(pref, cmd, array));
|
|
}
|
|
|
|
/*
|
|
* prop_dictionary_copyout_ioctl --
|
|
* Copy out a dictionary being received with an ioctl.
|
|
*/
|
|
int
|
|
prop_dictionary_copyout_ioctl(struct plistref *pref, const u_long cmd,
|
|
prop_dictionary_t dict)
|
|
{
|
|
return (
|
|
_prop_object_copyout_ioctl(pref, cmd, dict));
|
|
}
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* __NetBSD__ */
|