650 строки
16 KiB
C
650 строки
16 KiB
C
/*
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* ioctl.c
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*
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* Copyright (C) 1995, 1996 by Volker Lendecke
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* Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
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* Modified 1998, 1999 Wolfram Pienkoss for NLS
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*
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*/
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#include <linux/config.h>
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#include <asm/uaccess.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/ioctl.h>
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#include <linux/time.h>
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#include <linux/mm.h>
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#include <linux/highuid.h>
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#include <linux/vmalloc.h>
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#include <linux/ncp_fs.h>
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#include "ncplib_kernel.h"
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/* maximum limit for ncp_objectname_ioctl */
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#define NCP_OBJECT_NAME_MAX_LEN 4096
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/* maximum limit for ncp_privatedata_ioctl */
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#define NCP_PRIVATE_DATA_MAX_LEN 8192
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/* maximum negotiable packet size */
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#define NCP_PACKET_SIZE_INTERNAL 65536
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static int
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ncp_get_fs_info(struct ncp_server* server, struct inode* inode, struct ncp_fs_info __user *arg)
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{
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struct ncp_fs_info info;
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if ((permission(inode, MAY_WRITE, NULL) != 0)
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&& (current->uid != server->m.mounted_uid)) {
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return -EACCES;
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}
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if (copy_from_user(&info, arg, sizeof(info)))
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return -EFAULT;
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if (info.version != NCP_GET_FS_INFO_VERSION) {
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DPRINTK("info.version invalid: %d\n", info.version);
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return -EINVAL;
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}
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/* TODO: info.addr = server->m.serv_addr; */
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SET_UID(info.mounted_uid, server->m.mounted_uid);
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info.connection = server->connection;
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info.buffer_size = server->buffer_size;
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info.volume_number = NCP_FINFO(inode)->volNumber;
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info.directory_id = NCP_FINFO(inode)->DosDirNum;
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if (copy_to_user(arg, &info, sizeof(info)))
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return -EFAULT;
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return 0;
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}
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static int
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ncp_get_fs_info_v2(struct ncp_server* server, struct inode* inode, struct ncp_fs_info_v2 __user * arg)
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{
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struct ncp_fs_info_v2 info2;
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if ((permission(inode, MAY_WRITE, NULL) != 0)
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&& (current->uid != server->m.mounted_uid)) {
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return -EACCES;
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}
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if (copy_from_user(&info2, arg, sizeof(info2)))
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return -EFAULT;
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if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
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DPRINTK("info.version invalid: %d\n", info2.version);
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return -EINVAL;
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}
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info2.mounted_uid = server->m.mounted_uid;
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info2.connection = server->connection;
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info2.buffer_size = server->buffer_size;
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info2.volume_number = NCP_FINFO(inode)->volNumber;
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info2.directory_id = NCP_FINFO(inode)->DosDirNum;
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info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
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if (copy_to_user(arg, &info2, sizeof(info2)))
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return -EFAULT;
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return 0;
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}
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#ifdef CONFIG_NCPFS_NLS
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/* Here we are select the iocharset and the codepage for NLS.
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* Thanks Petr Vandrovec for idea and many hints.
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*/
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static int
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ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
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{
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struct ncp_nls_ioctl user;
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struct nls_table *codepage;
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struct nls_table *iocharset;
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struct nls_table *oldset_io;
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struct nls_table *oldset_cp;
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (server->root_setuped)
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return -EBUSY;
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if (copy_from_user(&user, arg, sizeof(user)))
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return -EFAULT;
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codepage = NULL;
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user.codepage[NCP_IOCSNAME_LEN] = 0;
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if (!user.codepage[0] || !strcmp(user.codepage, "default"))
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codepage = load_nls_default();
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else {
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codepage = load_nls(user.codepage);
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if (!codepage) {
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return -EBADRQC;
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}
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}
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iocharset = NULL;
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user.iocharset[NCP_IOCSNAME_LEN] = 0;
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if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
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iocharset = load_nls_default();
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NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
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} else if (!strcmp(user.iocharset, "utf8")) {
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iocharset = load_nls_default();
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NCP_SET_FLAG(server, NCP_FLAG_UTF8);
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} else {
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iocharset = load_nls(user.iocharset);
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if (!iocharset) {
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unload_nls(codepage);
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return -EBADRQC;
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}
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NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
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}
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oldset_cp = server->nls_vol;
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server->nls_vol = codepage;
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oldset_io = server->nls_io;
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server->nls_io = iocharset;
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if (oldset_cp)
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unload_nls(oldset_cp);
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if (oldset_io)
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unload_nls(oldset_io);
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return 0;
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}
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static int
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ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
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{
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struct ncp_nls_ioctl user;
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int len;
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memset(&user, 0, sizeof(user));
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if (server->nls_vol && server->nls_vol->charset) {
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len = strlen(server->nls_vol->charset);
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if (len > NCP_IOCSNAME_LEN)
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len = NCP_IOCSNAME_LEN;
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strncpy(user.codepage, server->nls_vol->charset, len);
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user.codepage[len] = 0;
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}
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if (NCP_IS_FLAG(server, NCP_FLAG_UTF8))
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strcpy(user.iocharset, "utf8");
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else if (server->nls_io && server->nls_io->charset) {
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len = strlen(server->nls_io->charset);
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if (len > NCP_IOCSNAME_LEN)
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len = NCP_IOCSNAME_LEN;
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strncpy(user.iocharset, server->nls_io->charset, len);
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user.iocharset[len] = 0;
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}
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if (copy_to_user(arg, &user, sizeof(user)))
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return -EFAULT;
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return 0;
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}
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#endif /* CONFIG_NCPFS_NLS */
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int ncp_ioctl(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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struct ncp_server *server = NCP_SERVER(inode);
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int result;
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struct ncp_ioctl_request request;
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char* bouncebuffer;
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void __user *argp = (void __user *)arg;
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switch (cmd) {
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case NCP_IOC_NCPREQUEST:
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if ((permission(inode, MAY_WRITE, NULL) != 0)
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&& (current->uid != server->m.mounted_uid)) {
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return -EACCES;
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}
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if (copy_from_user(&request, argp, sizeof(request)))
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return -EFAULT;
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if ((request.function > 255)
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|| (request.size >
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NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
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return -EINVAL;
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}
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bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
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if (!bouncebuffer)
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return -ENOMEM;
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if (copy_from_user(bouncebuffer, request.data, request.size)) {
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vfree(bouncebuffer);
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return -EFAULT;
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}
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ncp_lock_server(server);
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/* FIXME: We hack around in the server's structures
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here to be able to use ncp_request */
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server->has_subfunction = 0;
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server->current_size = request.size;
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memcpy(server->packet, bouncebuffer, request.size);
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result = ncp_request2(server, request.function,
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bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
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if (result < 0)
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result = -EIO;
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else
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result = server->reply_size;
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ncp_unlock_server(server);
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DPRINTK("ncp_ioctl: copy %d bytes\n",
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result);
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if (result >= 0)
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if (copy_to_user(request.data, bouncebuffer, result))
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result = -EFAULT;
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vfree(bouncebuffer);
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return result;
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case NCP_IOC_CONN_LOGGED_IN:
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if (!capable(CAP_SYS_ADMIN))
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return -EACCES;
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if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
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return -EINVAL;
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if (server->root_setuped)
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return -EBUSY;
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server->root_setuped = 1;
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return ncp_conn_logged_in(inode->i_sb);
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case NCP_IOC_GET_FS_INFO:
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return ncp_get_fs_info(server, inode, argp);
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case NCP_IOC_GET_FS_INFO_V2:
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return ncp_get_fs_info_v2(server, inode, argp);
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case NCP_IOC_GETMOUNTUID2:
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{
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unsigned long tmp = server->m.mounted_uid;
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if ( (permission(inode, MAY_READ, NULL) != 0)
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&& (current->uid != server->m.mounted_uid))
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{
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return -EACCES;
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}
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if (put_user(tmp, (unsigned long __user *)argp))
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return -EFAULT;
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return 0;
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}
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case NCP_IOC_GETROOT:
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{
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struct ncp_setroot_ioctl sr;
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if ( (permission(inode, MAY_READ, NULL) != 0)
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&& (current->uid != server->m.mounted_uid))
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{
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return -EACCES;
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}
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if (server->m.mounted_vol[0]) {
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struct dentry* dentry = inode->i_sb->s_root;
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if (dentry) {
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struct inode* inode = dentry->d_inode;
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if (inode) {
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sr.volNumber = NCP_FINFO(inode)->volNumber;
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sr.dirEntNum = NCP_FINFO(inode)->dirEntNum;
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sr.namespace = server->name_space[sr.volNumber];
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} else
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DPRINTK("ncpfs: s_root->d_inode==NULL\n");
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} else
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DPRINTK("ncpfs: s_root==NULL\n");
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} else {
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sr.volNumber = -1;
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sr.namespace = 0;
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sr.dirEntNum = 0;
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}
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if (copy_to_user(argp, &sr, sizeof(sr)))
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return -EFAULT;
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return 0;
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}
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case NCP_IOC_SETROOT:
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{
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struct ncp_setroot_ioctl sr;
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__u32 vnum;
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__le32 de;
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__le32 dosde;
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struct dentry* dentry;
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if (!capable(CAP_SYS_ADMIN))
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{
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return -EACCES;
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}
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if (server->root_setuped) return -EBUSY;
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if (copy_from_user(&sr, argp, sizeof(sr)))
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return -EFAULT;
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if (sr.volNumber < 0) {
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server->m.mounted_vol[0] = 0;
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vnum = NCP_NUMBER_OF_VOLUMES;
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de = 0;
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dosde = 0;
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} else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
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return -EINVAL;
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} else if (ncp_mount_subdir(server, sr.volNumber,
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sr.namespace, sr.dirEntNum,
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&vnum, &de, &dosde)) {
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return -ENOENT;
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}
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dentry = inode->i_sb->s_root;
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server->root_setuped = 1;
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if (dentry) {
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struct inode* inode = dentry->d_inode;
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if (inode) {
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NCP_FINFO(inode)->volNumber = vnum;
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NCP_FINFO(inode)->dirEntNum = de;
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NCP_FINFO(inode)->DosDirNum = dosde;
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} else
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DPRINTK("ncpfs: s_root->d_inode==NULL\n");
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} else
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DPRINTK("ncpfs: s_root==NULL\n");
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return 0;
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}
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#ifdef CONFIG_NCPFS_PACKET_SIGNING
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case NCP_IOC_SIGN_INIT:
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if ((permission(inode, MAY_WRITE, NULL) != 0)
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&& (current->uid != server->m.mounted_uid))
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{
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return -EACCES;
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}
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if (argp) {
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if (server->sign_wanted)
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{
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struct ncp_sign_init sign;
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if (copy_from_user(&sign, argp, sizeof(sign)))
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return -EFAULT;
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memcpy(server->sign_root,sign.sign_root,8);
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memcpy(server->sign_last,sign.sign_last,16);
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server->sign_active = 1;
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}
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/* ignore when signatures not wanted */
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} else {
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server->sign_active = 0;
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}
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return 0;
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case NCP_IOC_SIGN_WANTED:
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if ( (permission(inode, MAY_READ, NULL) != 0)
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&& (current->uid != server->m.mounted_uid))
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{
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return -EACCES;
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}
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if (put_user(server->sign_wanted, (int __user *)argp))
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return -EFAULT;
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return 0;
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case NCP_IOC_SET_SIGN_WANTED:
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{
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int newstate;
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if ( (permission(inode, MAY_WRITE, NULL) != 0)
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&& (current->uid != server->m.mounted_uid))
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{
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return -EACCES;
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}
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/* get only low 8 bits... */
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if (get_user(newstate, (unsigned char __user *)argp))
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return -EFAULT;
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if (server->sign_active) {
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/* cannot turn signatures OFF when active */
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if (!newstate) return -EINVAL;
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} else {
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server->sign_wanted = newstate != 0;
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}
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return 0;
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}
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#endif /* CONFIG_NCPFS_PACKET_SIGNING */
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#ifdef CONFIG_NCPFS_IOCTL_LOCKING
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case NCP_IOC_LOCKUNLOCK:
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if ( (permission(inode, MAY_WRITE, NULL) != 0)
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&& (current->uid != server->m.mounted_uid))
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{
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return -EACCES;
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}
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{
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struct ncp_lock_ioctl rqdata;
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int result;
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if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
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return -EFAULT;
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if (rqdata.origin != 0)
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return -EINVAL;
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/* check for cmd */
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switch (rqdata.cmd) {
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case NCP_LOCK_EX:
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case NCP_LOCK_SH:
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if (rqdata.timeout == 0)
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rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
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else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
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rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
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break;
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case NCP_LOCK_LOG:
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rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT; /* has no effect */
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case NCP_LOCK_CLEAR:
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break;
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default:
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return -EINVAL;
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}
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/* locking needs both read and write access */
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if ((result = ncp_make_open(inode, O_RDWR)) != 0)
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{
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return result;
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}
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result = -EIO;
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if (!ncp_conn_valid(server))
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goto outrel;
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result = -EISDIR;
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if (!S_ISREG(inode->i_mode))
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goto outrel;
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if (rqdata.cmd == NCP_LOCK_CLEAR)
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{
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result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
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NCP_FINFO(inode)->file_handle,
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rqdata.offset,
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rqdata.length);
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if (result > 0) result = 0; /* no such lock */
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}
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else
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{
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int lockcmd;
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switch (rqdata.cmd)
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{
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case NCP_LOCK_EX: lockcmd=1; break;
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case NCP_LOCK_SH: lockcmd=3; break;
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default: lockcmd=0; break;
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}
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result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
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NCP_FINFO(inode)->file_handle,
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lockcmd,
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rqdata.offset,
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rqdata.length,
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rqdata.timeout);
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if (result > 0) result = -EAGAIN;
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}
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outrel:
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ncp_inode_close(inode);
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return result;
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}
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#endif /* CONFIG_NCPFS_IOCTL_LOCKING */
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case NCP_IOC_GETOBJECTNAME:
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if (current->uid != server->m.mounted_uid) {
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return -EACCES;
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}
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{
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struct ncp_objectname_ioctl user;
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size_t outl;
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if (copy_from_user(&user, argp, sizeof(user)))
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return -EFAULT;
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user.auth_type = server->auth.auth_type;
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outl = user.object_name_len;
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user.object_name_len = server->auth.object_name_len;
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if (outl > user.object_name_len)
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outl = user.object_name_len;
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if (outl) {
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if (copy_to_user(user.object_name,
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server->auth.object_name,
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outl)) return -EFAULT;
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}
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if (copy_to_user(argp, &user, sizeof(user)))
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return -EFAULT;
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return 0;
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}
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case NCP_IOC_SETOBJECTNAME:
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if (current->uid != server->m.mounted_uid) {
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return -EACCES;
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}
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{
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struct ncp_objectname_ioctl user;
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void* newname;
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void* oldname;
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size_t oldnamelen;
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void* oldprivate;
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size_t oldprivatelen;
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if (copy_from_user(&user, argp, sizeof(user)))
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return -EFAULT;
|
|
if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
|
|
return -ENOMEM;
|
|
if (user.object_name_len) {
|
|
newname = ncp_kmalloc(user.object_name_len, GFP_USER);
|
|
if (!newname) return -ENOMEM;
|
|
if (copy_from_user(newname, user.object_name, user.object_name_len)) {
|
|
ncp_kfree_s(newname, user.object_name_len);
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
newname = NULL;
|
|
}
|
|
/* enter critical section */
|
|
/* maybe that kfree can sleep so do that this way */
|
|
/* it is at least more SMP friendly (in future...) */
|
|
oldname = server->auth.object_name;
|
|
oldnamelen = server->auth.object_name_len;
|
|
oldprivate = server->priv.data;
|
|
oldprivatelen = server->priv.len;
|
|
server->auth.auth_type = user.auth_type;
|
|
server->auth.object_name_len = user.object_name_len;
|
|
server->auth.object_name = newname;
|
|
server->priv.len = 0;
|
|
server->priv.data = NULL;
|
|
/* leave critical section */
|
|
if (oldprivate) ncp_kfree_s(oldprivate, oldprivatelen);
|
|
if (oldname) ncp_kfree_s(oldname, oldnamelen);
|
|
return 0;
|
|
}
|
|
case NCP_IOC_GETPRIVATEDATA:
|
|
if (current->uid != server->m.mounted_uid) {
|
|
return -EACCES;
|
|
}
|
|
{
|
|
struct ncp_privatedata_ioctl user;
|
|
size_t outl;
|
|
|
|
if (copy_from_user(&user, argp, sizeof(user)))
|
|
return -EFAULT;
|
|
outl = user.len;
|
|
user.len = server->priv.len;
|
|
if (outl > user.len) outl = user.len;
|
|
if (outl) {
|
|
if (copy_to_user(user.data,
|
|
server->priv.data,
|
|
outl)) return -EFAULT;
|
|
}
|
|
if (copy_to_user(argp, &user, sizeof(user)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
case NCP_IOC_SETPRIVATEDATA:
|
|
if (current->uid != server->m.mounted_uid) {
|
|
return -EACCES;
|
|
}
|
|
{
|
|
struct ncp_privatedata_ioctl user;
|
|
void* new;
|
|
void* old;
|
|
size_t oldlen;
|
|
|
|
if (copy_from_user(&user, argp, sizeof(user)))
|
|
return -EFAULT;
|
|
if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
|
|
return -ENOMEM;
|
|
if (user.len) {
|
|
new = ncp_kmalloc(user.len, GFP_USER);
|
|
if (!new) return -ENOMEM;
|
|
if (copy_from_user(new, user.data, user.len)) {
|
|
ncp_kfree_s(new, user.len);
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
new = NULL;
|
|
}
|
|
/* enter critical section */
|
|
old = server->priv.data;
|
|
oldlen = server->priv.len;
|
|
server->priv.len = user.len;
|
|
server->priv.data = new;
|
|
/* leave critical section */
|
|
if (old) ncp_kfree_s(old, oldlen);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_NCPFS_NLS
|
|
case NCP_IOC_SETCHARSETS:
|
|
return ncp_set_charsets(server, argp);
|
|
|
|
case NCP_IOC_GETCHARSETS:
|
|
return ncp_get_charsets(server, argp);
|
|
|
|
#endif /* CONFIG_NCPFS_NLS */
|
|
|
|
case NCP_IOC_SETDENTRYTTL:
|
|
if ((permission(inode, MAY_WRITE, NULL) != 0) &&
|
|
(current->uid != server->m.mounted_uid))
|
|
return -EACCES;
|
|
{
|
|
u_int32_t user;
|
|
|
|
if (copy_from_user(&user, argp, sizeof(user)))
|
|
return -EFAULT;
|
|
/* 20 secs at most... */
|
|
if (user > 20000)
|
|
return -EINVAL;
|
|
user = (user * HZ) / 1000;
|
|
server->dentry_ttl = user;
|
|
return 0;
|
|
}
|
|
|
|
case NCP_IOC_GETDENTRYTTL:
|
|
{
|
|
u_int32_t user = (server->dentry_ttl * 1000) / HZ;
|
|
if (copy_to_user(argp, &user, sizeof(user)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
}
|
|
/* #ifdef CONFIG_UID16 */
|
|
/* NCP_IOC_GETMOUNTUID may be same as NCP_IOC_GETMOUNTUID2,
|
|
so we have this out of switch */
|
|
if (cmd == NCP_IOC_GETMOUNTUID) {
|
|
__kernel_uid_t uid = 0;
|
|
if ((permission(inode, MAY_READ, NULL) != 0)
|
|
&& (current->uid != server->m.mounted_uid)) {
|
|
return -EACCES;
|
|
}
|
|
SET_UID(uid, server->m.mounted_uid);
|
|
if (put_user(uid, (__kernel_uid_t __user *)argp))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
/* #endif */
|
|
return -EINVAL;
|
|
}
|