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   1 /*
   2  *  ioctl.c
   3  *
   4  *  Copyright (C) 1995, 1996 by Volker Lendecke
   5  *  Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
   6  *  Modified 1998, 1999 Wolfram Pienkoss for NLS
   7  *
   8  */
   9
  10 #include <linux/capability.h>
  11 #include <linux/compat.h>
  12 #include <linux/errno.h>
  13 #include <linux/fs.h>
  14 #include <linux/ioctl.h>
  15 #include <linux/time.h>
  16 #include <linux/mm.h>
  17 #include <linux/highuid.h>
  18 #include <linux/smp_lock.h>
  19 #include <linux/vmalloc.h>
  20
  21 #include <linux/ncp_fs.h>
  22
  23 #include <asm/uaccess.h>
  24
  25 #include "ncplib_kernel.h"
  26
  27 /* maximum limit for ncp_objectname_ioctl */
  28 #define NCP_OBJECT_NAME_MAX_LEN 4096
  29 /* maximum limit for ncp_privatedata_ioctl */
  30 #define NCP_PRIVATE_DATA_MAX_LEN 8192
  31 /* maximum negotiable packet size */
  32 #define NCP_PACKET_SIZE_INTERNAL 65536
  33
  34 static int
  35 ncp_get_fs_info(struct ncp_server * server, struct file *file,
  36                 struct ncp_fs_info __user *arg)
  37 {
  38         struct inode *inode = file->f_dentry->d_inode;
  39         struct ncp_fs_info info;
  40
  41         if ((file_permission(file, MAY_WRITE) != 0)
  42             && (current->uid != server->m.mounted_uid)) {
  43                 return -EACCES;
  44         }
  45         if (copy_from_user(&info, arg, sizeof(info)))
  46                 return -EFAULT;
  47
  48         if (info.version != NCP_GET_FS_INFO_VERSION) {
  49                 DPRINTK("info.version invalid: %d\n", info.version);
  50                 return -EINVAL;
  51         }
  52         /* TODO: info.addr = server->m.serv_addr; */
  53         SET_UID(info.mounted_uid, server->m.mounted_uid);
  54         info.connection         = server->connection;
  55         info.buffer_size        = server->buffer_size;
  56         info.volume_number      = NCP_FINFO(inode)->volNumber;
  57         info.directory_id       = NCP_FINFO(inode)->DosDirNum;
  58
  59         if (copy_to_user(arg, &info, sizeof(info)))
  60                 return -EFAULT;
  61         return 0;
  62 }
  63
  64 static int
  65 ncp_get_fs_info_v2(struct ncp_server * server, struct file *file,
  66                    struct ncp_fs_info_v2 __user * arg)
  67 {
  68         struct inode *inode = file->f_dentry->d_inode;
  69         struct ncp_fs_info_v2 info2;
  70
  71         if ((file_permission(file, MAY_WRITE) != 0)
  72             && (current->uid != server->m.mounted_uid)) {
  73                 return -EACCES;
  74         }
  75         if (copy_from_user(&info2, arg, sizeof(info2)))
  76                 return -EFAULT;
  77
  78         if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
  79                 DPRINTK("info.version invalid: %d\n", info2.version);
  80                 return -EINVAL;
  81         }
  82         info2.mounted_uid   = server->m.mounted_uid;
  83         info2.connection    = server->connection;
  84         info2.buffer_size   = server->buffer_size;
  85         info2.volume_number = NCP_FINFO(inode)->volNumber;
  86         info2.directory_id  = NCP_FINFO(inode)->DosDirNum;
  87         info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
  88
  89         if (copy_to_user(arg, &info2, sizeof(info2)))
  90                 return -EFAULT;
  91         return 0;
  92 }
  93
  94 #ifdef CONFIG_COMPAT
  95 struct compat_ncp_objectname_ioctl
  96 {
  97         s32             auth_type;
  98         u32             object_name_len;
  99         compat_caddr_t  object_name;    /* an userspace data, in most cases user name */
 100 };
 101
 102 struct compat_ncp_fs_info_v2 {
 103         s32 version;
 104         u32 mounted_uid;
 105         u32 connection;
 106         u32 buffer_size;
 107
 108         u32 volume_number;
 109         u32 directory_id;
 110
 111         u32 dummy1;
 112         u32 dummy2;
 113         u32 dummy3;
 114 };
 115
 116 struct compat_ncp_ioctl_request {
 117         u32 function;
 118         u32 size;
 119         compat_caddr_t data;
 120 };
 121
 122 struct compat_ncp_privatedata_ioctl
 123 {
 124         u32             len;
 125         compat_caddr_t  data;           /* ~1000 for NDS */
 126 };
 127
 128 #define NCP_IOC_GET_FS_INFO_V2_32       _IOWR('n', 4, struct compat_ncp_fs_info_v2)
 129 #define NCP_IOC_NCPREQUEST_32           _IOR('n', 1, struct compat_ncp_ioctl_request)
 130 #define NCP_IOC_GETOBJECTNAME_32        _IOWR('n', 9, struct compat_ncp_objectname_ioctl)
 131 #define NCP_IOC_SETOBJECTNAME_32        _IOR('n', 9, struct compat_ncp_objectname_ioctl)
 132 #define NCP_IOC_GETPRIVATEDATA_32       _IOWR('n', 10, struct compat_ncp_privatedata_ioctl)
 133 #define NCP_IOC_SETPRIVATEDATA_32       _IOR('n', 10, struct compat_ncp_privatedata_ioctl)
 134
 135 static int
 136 ncp_get_compat_fs_info_v2(struct ncp_server * server, struct file *file,
 137                    struct compat_ncp_fs_info_v2 __user * arg)
 138 {
 139         struct inode *inode = file->f_dentry->d_inode;
 140         struct compat_ncp_fs_info_v2 info2;
 141
 142         if ((file_permission(file, MAY_WRITE) != 0)
 143             && (current->uid != server->m.mounted_uid)) {
 144                 return -EACCES;
 145         }
 146         if (copy_from_user(&info2, arg, sizeof(info2)))
 147                 return -EFAULT;
 148
 149         if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
 150                 DPRINTK("info.version invalid: %d\n", info2.version);
 151                 return -EINVAL;
 152         }
 153         info2.mounted_uid   = server->m.mounted_uid;
 154         info2.connection    = server->connection;
 155         info2.buffer_size   = server->buffer_size;
 156         info2.volume_number = NCP_FINFO(inode)->volNumber;
 157         info2.directory_id  = NCP_FINFO(inode)->DosDirNum;
 158         info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
 159
 160         if (copy_to_user(arg, &info2, sizeof(info2)))
 161                 return -EFAULT;
 162         return 0;
 163 }
 164 #endif
 165
 166 #define NCP_IOC_GETMOUNTUID16           _IOW('n', 2, u16)
 167 #define NCP_IOC_GETMOUNTUID32           _IOW('n', 2, u32)
 168 #define NCP_IOC_GETMOUNTUID64           _IOW('n', 2, u64)
 169
 170 #ifdef CONFIG_NCPFS_NLS
 171 /* Here we are select the iocharset and the codepage for NLS.
 172  * Thanks Petr Vandrovec for idea and many hints.
 173  */
 174 static int
 175 ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
 176 {
 177         struct ncp_nls_ioctl user;
 178         struct nls_table *codepage;
 179         struct nls_table *iocharset;
 180         struct nls_table *oldset_io;
 181         struct nls_table *oldset_cp;
 182
 183         if (!capable(CAP_SYS_ADMIN))
 184                 return -EACCES;
 185         if (server->root_setuped)
 186                 return -EBUSY;
 187
 188         if (copy_from_user(&user, arg, sizeof(user)))
 189                 return -EFAULT;
 190
 191         codepage = NULL;
 192         user.codepage[NCP_IOCSNAME_LEN] = 0;
 193         if (!user.codepage[0] || !strcmp(user.codepage, "default"))
 194                 codepage = load_nls_default();
 195         else {
 196                 codepage = load_nls(user.codepage);
 197                 if (!codepage) {
 198                         return -EBADRQC;
 199                 }
 200         }
 201
 202         iocharset = NULL;
 203         user.iocharset[NCP_IOCSNAME_LEN] = 0;
 204         if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
 205                 iocharset = load_nls_default();
 206                 NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
 207         } else if (!strcmp(user.iocharset, "utf8")) {
 208                 iocharset = load_nls_default();
 209                 NCP_SET_FLAG(server, NCP_FLAG_UTF8);
 210         } else {
 211                 iocharset = load_nls(user.iocharset);
 212                 if (!iocharset) {
 213                         unload_nls(codepage);
 214                         return -EBADRQC;
 215                 }
 216                 NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
 217         }
 218
 219         oldset_cp = server->nls_vol;
 220         server->nls_vol = codepage;
 221         oldset_io = server->nls_io;
 222         server->nls_io = iocharset;
 223
 224         if (oldset_cp)
 225                 unload_nls(oldset_cp);
 226         if (oldset_io)
 227                 unload_nls(oldset_io);
 228
 229         return 0;
 230 }
 231
 232 static int
 233 ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
 234 {
 235         struct ncp_nls_ioctl user;
 236         int len;
 237
 238         memset(&user, 0, sizeof(user));
 239         if (server->nls_vol && server->nls_vol->charset) {
 240                 len = strlen(server->nls_vol->charset);
 241                 if (len > NCP_IOCSNAME_LEN)
 242                         len = NCP_IOCSNAME_LEN;
 243                 strncpy(user.codepage, server->nls_vol->charset, len);
 244                 user.codepage[len] = 0;
 245         }
 246
 247         if (NCP_IS_FLAG(server, NCP_FLAG_UTF8))
 248                 strcpy(user.iocharset, "utf8");
 249         else if (server->nls_io && server->nls_io->charset) {
 250                 len = strlen(server->nls_io->charset);
 251                 if (len > NCP_IOCSNAME_LEN)
 252                         len = NCP_IOCSNAME_LEN;
 253                 strncpy(user.iocharset, server->nls_io->charset, len);
 254                 user.iocharset[len] = 0;
 255         }
 256
 257         if (copy_to_user(arg, &user, sizeof(user)))
 258                 return -EFAULT;
 259         return 0;
 260 }
 261 #endif /* CONFIG_NCPFS_NLS */
 262
 263 int ncp_ioctl(struct inode *inode, struct file *filp,
 264               unsigned int cmd, unsigned long arg)
 265 {
 266         struct ncp_server *server = NCP_SERVER(inode);
 267         int result;
 268         struct ncp_ioctl_request request;
 269         char* bouncebuffer;
 270         void __user *argp = (void __user *)arg;
 271
 272         switch (cmd) {
 273 #ifdef CONFIG_COMPAT
 274         case NCP_IOC_NCPREQUEST_32:
 275 #endif
 276         case NCP_IOC_NCPREQUEST:
 277                 if ((file_permission(filp, MAY_WRITE) != 0)
 278                     && (current->uid != server->m.mounted_uid)) {
 279                         return -EACCES;
 280                 }
 281 #ifdef CONFIG_COMPAT
 282                 if (cmd == NCP_IOC_NCPREQUEST_32) {
 283                         struct compat_ncp_ioctl_request request32;
 284                         if (copy_from_user(&request32, argp, sizeof(request32)))
 285                                 return -EFAULT;
 286                         request.function = request32.function;
 287                         request.size = request32.size;
 288                         request.data = compat_ptr(request32.data);
 289                 } else
 290 #endif
 291                 if (copy_from_user(&request, argp, sizeof(request)))
 292                         return -EFAULT;
 293
 294                 if ((request.function > 255)
 295                     || (request.size >
 296                   NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
 297                         return -EINVAL;
 298                 }
 299                 bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
 300                 if (!bouncebuffer)
 301                         return -ENOMEM;
 302                 if (copy_from_user(bouncebuffer, request.data, request.size)) {
 303                         vfree(bouncebuffer);
 304                         return -EFAULT;
 305                 }
 306                 ncp_lock_server(server);
 307
 308                 /* FIXME: We hack around in the server's structures
 309                    here to be able to use ncp_request */
 310
 311                 server->has_subfunction = 0;
 312                 server->current_size = request.size;
 313                 memcpy(server->packet, bouncebuffer, request.size);
 314
 315                 result = ncp_request2(server, request.function,
 316                         bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
 317                 if (result < 0)
 318                         result = -EIO;
 319                 else
 320                         result = server->reply_size;
 321                 ncp_unlock_server(server);
 322                 DPRINTK("ncp_ioctl: copy %d bytes\n",
 323                         result);
 324                 if (result >= 0)
 325                         if (copy_to_user(request.data, bouncebuffer, result))
 326                                 result = -EFAULT;
 327                 vfree(bouncebuffer);
 328                 return result;
 329
 330         case NCP_IOC_CONN_LOGGED_IN:
 331
 332                 if (!capable(CAP_SYS_ADMIN))
 333                         return -EACCES;
 334                 if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
 335                         return -EINVAL;
 336                 if (server->root_setuped)
 337                         return -EBUSY;
 338                 server->root_setuped = 1;
 339                 return ncp_conn_logged_in(inode->i_sb);
 340
 341         case NCP_IOC_GET_FS_INFO:
 342                 return ncp_get_fs_info(server, filp, argp);
 343
 344         case NCP_IOC_GET_FS_INFO_V2:
 345                 return ncp_get_fs_info_v2(server, filp, argp);
 346
 347 #ifdef CONFIG_COMPAT
 348         case NCP_IOC_GET_FS_INFO_V2_32:
 349                 return ncp_get_compat_fs_info_v2(server, filp, argp);
 350 #endif
 351         /* we have too many combinations of CONFIG_COMPAT,
 352          * CONFIG_64BIT and CONFIG_UID16, so just handle
 353          * any of the possible ioctls */
 354         case NCP_IOC_GETMOUNTUID16:
 355         case NCP_IOC_GETMOUNTUID32:
 356         case NCP_IOC_GETMOUNTUID64:
 357                 if ((file_permission(filp, MAY_READ) != 0)
 358                         && (current->uid != server->m.mounted_uid)) {
 359                         return -EACCES;
 360                 }
 361                 if (cmd == NCP_IOC_GETMOUNTUID16) {
 362                         u16 uid;
 363                         SET_UID(uid, server->m.mounted_uid);
 364                         if (put_user(uid, (u16 __user *)argp))
 365                                 return -EFAULT;
 366                 } else if (cmd == NCP_IOC_GETMOUNTUID32) {
 367                         if (put_user(server->m.mounted_uid,
 368                                                 (u32 __user *)argp))
 369                                 return -EFAULT;
 370                 } else {
 371                         if (put_user(server->m.mounted_uid,
 372                                                 (u64 __user *)argp))
 373                                 return -EFAULT;
 374                 }
 375                 return 0;
 376
 377         case NCP_IOC_GETROOT:
 378                 {
 379                         struct ncp_setroot_ioctl sr;
 380
 381                         if ((file_permission(filp, MAY_READ) != 0)
 382                             && (current->uid != server->m.mounted_uid))
 383                         {
 384                                 return -EACCES;
 385                         }
 386                         if (server->m.mounted_vol[0]) {
 387                                 struct dentry* dentry = inode->i_sb->s_root;
 388
 389                                 if (dentry) {
 390                                         struct inode* inode = dentry->d_inode;
 391
 392                                         if (inode) {
 393                                                 sr.volNumber = NCP_FINFO(inode)->volNumber;
 394                                                 sr.dirEntNum = NCP_FINFO(inode)->dirEntNum;
 395                                                 sr.namespace = server->name_space[sr.volNumber];
 396                                         } else
 397                                                 DPRINTK("ncpfs: s_root->d_inode==NULL\n");
 398                                 } else
 399                                         DPRINTK("ncpfs: s_root==NULL\n");
 400                         } else {
 401                                 sr.volNumber = -1;
 402                                 sr.namespace = 0;
 403                                 sr.dirEntNum = 0;
 404                         }
 405                         if (copy_to_user(argp, &sr, sizeof(sr)))
 406                                 return -EFAULT;
 407                         return 0;
 408                 }
 409         case NCP_IOC_SETROOT:
 410                 {
 411                         struct ncp_setroot_ioctl sr;
 412                         __u32 vnum;
 413                         __le32 de;
 414                         __le32 dosde;
 415                         struct dentry* dentry;
 416
 417                         if (!capable(CAP_SYS_ADMIN))
 418                         {
 419                                 return -EACCES;
 420                         }
 421                         if (server->root_setuped) return -EBUSY;
 422                         if (copy_from_user(&sr, argp, sizeof(sr)))
 423                                 return -EFAULT;
 424                         if (sr.volNumber < 0) {
 425                                 server->m.mounted_vol[0] = 0;
 426                                 vnum = NCP_NUMBER_OF_VOLUMES;
 427                                 de = 0;
 428                                 dosde = 0;
 429                         } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
 430                                 return -EINVAL;
 431                         } else if (ncp_mount_subdir(server, sr.volNumber,
 432                                                 sr.namespace, sr.dirEntNum,
 433                                                 &vnum, &de, &dosde)) {
 434                                 return -ENOENT;
 435                         }
 436
 437                         dentry = inode->i_sb->s_root;
 438                         server->root_setuped = 1;
 439                         if (dentry) {
 440                                 struct inode* inode = dentry->d_inode;
 441
 442                                 if (inode) {
 443                                         NCP_FINFO(inode)->volNumber = vnum;
 444                                         NCP_FINFO(inode)->dirEntNum = de;
 445                                         NCP_FINFO(inode)->DosDirNum = dosde;
 446                                 } else
 447                                         DPRINTK("ncpfs: s_root->d_inode==NULL\n");
 448                         } else
 449                                 DPRINTK("ncpfs: s_root==NULL\n");
 450
 451                         return 0;
 452                 }
 453
 454 #ifdef CONFIG_NCPFS_PACKET_SIGNING
 455         case NCP_IOC_SIGN_INIT:
 456                 if ((file_permission(filp, MAY_WRITE) != 0)
 457                     && (current->uid != server->m.mounted_uid))
 458                 {
 459                         return -EACCES;
 460                 }
 461                 if (argp) {
 462                         if (server->sign_wanted)
 463                         {
 464                                 struct ncp_sign_init sign;
 465
 466                                 if (copy_from_user(&sign, argp, sizeof(sign)))
 467                                         return -EFAULT;
 468                                 memcpy(server->sign_root,sign.sign_root,8);
 469                                 memcpy(server->sign_last,sign.sign_last,16);
 470                                 server->sign_active = 1;
 471                         }
 472                         /* ignore when signatures not wanted */
 473                 } else {
 474                         server->sign_active = 0;
 475                 }
 476                 return 0;
 477
 478         case NCP_IOC_SIGN_WANTED:
 479                 if ((file_permission(filp, MAY_READ) != 0)
 480                     && (current->uid != server->m.mounted_uid))
 481                 {
 482                         return -EACCES;
 483                 }
 484
 485                 if (put_user(server->sign_wanted, (int __user *)argp))
 486                         return -EFAULT;
 487                 return 0;
 488         case NCP_IOC_SET_SIGN_WANTED:
 489                 {
 490                         int newstate;
 491
 492                         if ((file_permission(filp, MAY_WRITE) != 0)
 493                             && (current->uid != server->m.mounted_uid))
 494                         {
 495                                 return -EACCES;
 496                         }
 497                         /* get only low 8 bits... */
 498                         if (get_user(newstate, (unsigned char __user *)argp))
 499                                 return -EFAULT;
 500                         if (server->sign_active) {
 501                                 /* cannot turn signatures OFF when active */
 502                                 if (!newstate) return -EINVAL;
 503                         } else {
 504                                 server->sign_wanted = newstate != 0;
 505                         }
 506                         return 0;
 507                 }
 508
 509 #endif /* CONFIG_NCPFS_PACKET_SIGNING */
 510
 511 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
 512         case NCP_IOC_LOCKUNLOCK:
 513                 if ((file_permission(filp, MAY_WRITE) != 0)
 514                     && (current->uid != server->m.mounted_uid))
 515                 {
 516                         return -EACCES;
 517                 }
 518                 {
 519                         struct ncp_lock_ioctl    rqdata;
 520                         int result;
 521
 522                         if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
 523                                 return -EFAULT;
 524                         if (rqdata.origin != 0)
 525                                 return -EINVAL;
 526                         /* check for cmd */
 527                         switch (rqdata.cmd) {
 528                                 case NCP_LOCK_EX:
 529                                 case NCP_LOCK_SH:
 530                                                 if (rqdata.timeout == 0)
 531                                                         rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
 532                                                 else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
 533                                                         rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
 534                                                 break;
 535                                 case NCP_LOCK_LOG:
 536                                                 rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;      /* has no effect */
 537                                 case NCP_LOCK_CLEAR:
 538                                                 break;
 539                                 default:
 540                                                 return -EINVAL;
 541                         }
 542                         /* locking needs both read and write access */
 543                         if ((result = ncp_make_open(inode, O_RDWR)) != 0)
 544                         {
 545                                 return result;
 546                         }
 547                         result = -EIO;
 548                         if (!ncp_conn_valid(server))
 549                                 goto outrel;
 550                         result = -EISDIR;
 551                         if (!S_ISREG(inode->i_mode))
 552                                 goto outrel;
 553                         if (rqdata.cmd == NCP_LOCK_CLEAR)
 554                         {
 555                                 result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
 556                                                         NCP_FINFO(inode)->file_handle,
 557                                                         rqdata.offset,
 558                                                         rqdata.length);
 559                                 if (result > 0) result = 0;     /* no such lock */
 560                         }
 561                         else
 562                         {
 563                                 int lockcmd;
 564
 565                                 switch (rqdata.cmd)
 566                                 {
 567                                         case NCP_LOCK_EX:  lockcmd=1; break;
 568                                         case NCP_LOCK_SH:  lockcmd=3; break;
 569                                         default:           lockcmd=0; break;
 570                                 }
 571                                 result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
 572                                                         NCP_FINFO(inode)->file_handle,
 573                                                         lockcmd,
 574                                                         rqdata.offset,
 575                                                         rqdata.length,
 576                                                         rqdata.timeout);
 577                                 if (result > 0) result = -EAGAIN;
 578                         }
 579 outrel:
 580                         ncp_inode_close(inode);
 581                         return result;
 582                 }
 583 #endif  /* CONFIG_NCPFS_IOCTL_LOCKING */
 584
 585 #ifdef CONFIG_COMPAT
 586         case NCP_IOC_GETOBJECTNAME_32:
 587                 if (current->uid != server->m.mounted_uid) {
 588                         return -EACCES;
 589                 }
 590                 {
 591                         struct compat_ncp_objectname_ioctl user;
 592                         size_t outl;
 593
 594                         if (copy_from_user(&user, argp, sizeof(user)))
 595                                 return -EFAULT;
 596                         user.auth_type = server->auth.auth_type;
 597                         outl = user.object_name_len;
 598                         user.object_name_len = server->auth.object_name_len;
 599                         if (outl > user.object_name_len)
 600                                 outl = user.object_name_len;
 601                         if (outl) {
 602                                 if (copy_to_user(compat_ptr(user.object_name),
 603                                                  server->auth.object_name,
 604                                                  outl)) return -EFAULT;
 605                         }
 606                         if (copy_to_user(argp, &user, sizeof(user)))
 607                                 return -EFAULT;
 608                         return 0;
 609                 }
 610 #endif
 611         case NCP_IOC_GETOBJECTNAME:
 612                 if (current->uid != server->m.mounted_uid) {
 613                         return -EACCES;
 614                 }
 615                 {
 616                         struct ncp_objectname_ioctl user;
 617                         size_t outl;
 618
 619                         if (copy_from_user(&user, argp, sizeof(user)))
 620                                 return -EFAULT;
 621                         user.auth_type = server->auth.auth_type;
 622                         outl = user.object_name_len;
 623                         user.object_name_len = server->auth.object_name_len;
 624                         if (outl > user.object_name_len)
 625                                 outl = user.object_name_len;
 626                         if (outl) {
 627                                 if (copy_to_user(user.object_name,
 628                                                  server->auth.object_name,
 629                                                  outl)) return -EFAULT;
 630                         }
 631                         if (copy_to_user(argp, &user, sizeof(user)))
 632                                 return -EFAULT;
 633                         return 0;
 634                 }
 635 #ifdef CONFIG_COMPAT
 636         case NCP_IOC_SETOBJECTNAME_32:
 637 #endif
 638         case NCP_IOC_SETOBJECTNAME:
 639                 if (current->uid != server->m.mounted_uid) {
 640                         return -EACCES;
 641                 }
 642                 {
 643                         struct ncp_objectname_ioctl user;
 644                         void* newname;
 645                         void* oldname;
 646                         size_t oldnamelen;
 647                         void* oldprivate;
 648                         size_t oldprivatelen;
 649
 650 #ifdef CONFIG_COMPAT
 651                         if (cmd == NCP_IOC_SETOBJECTNAME_32) {
 652                                 struct compat_ncp_objectname_ioctl user32;
 653                                 if (copy_from_user(&user32, argp, sizeof(user32)))
 654                                         return -EFAULT;
 655                                 user.auth_type = user32.auth_type;
 656                                 user.object_name_len = user32.object_name_len;
 657                                 user.object_name = compat_ptr(user32.object_name);
 658                         } else
 659 #endif
 660                         if (copy_from_user(&user, argp, sizeof(user)))
 661                                 return -EFAULT;
 662
 663                         if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
 664                                 return -ENOMEM;
 665                         if (user.object_name_len) {
 666                                 newname = kmalloc(user.object_name_len, GFP_USER);
 667                                 if (!newname)
 668                                         return -ENOMEM;
 669                                 if (copy_from_user(newname, user.object_name, user.object_name_len)) {
 670                                         kfree(newname);
 671                                         return -EFAULT;
 672                                 }
 673                         } else {
 674                                 newname = NULL;
 675                         }
 676                         /* enter critical section */
 677                         /* maybe that kfree can sleep so do that this way */
 678                         /* it is at least more SMP friendly (in future...) */
 679                         oldname = server->auth.object_name;
 680                         oldnamelen = server->auth.object_name_len;
 681                         oldprivate = server->priv.data;
 682                         oldprivatelen = server->priv.len;
 683                         server->auth.auth_type = user.auth_type;
 684                         server->auth.object_name_len = user.object_name_len;
 685                         server->auth.object_name = newname;
 686                         server->priv.len = 0;
 687                         server->priv.data = NULL;
 688                         /* leave critical section */
 689                         kfree(oldprivate);
 690                         kfree(oldname);
 691                         return 0;
 692                 }
 693 #ifdef CONFIG_COMPAT
 694         case NCP_IOC_GETPRIVATEDATA_32:
 695 #endif
 696         case NCP_IOC_GETPRIVATEDATA:
 697                 if (current->uid != server->m.mounted_uid) {
 698                         return -EACCES;
 699                 }
 700                 {
 701                         struct ncp_privatedata_ioctl user;
 702                         size_t outl;
 703
 704 #ifdef CONFIG_COMPAT
 705                         if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
 706                                 struct compat_ncp_privatedata_ioctl user32;
 707                                 if (copy_from_user(&user32, argp, sizeof(user32)))
 708                                         return -EFAULT;
 709                                 user.len = user32.len;
 710                                 user.data = compat_ptr(user32.data);
 711                         } else
 712 #endif
 713                         if (copy_from_user(&user, argp, sizeof(user)))
 714                                 return -EFAULT;
 715
 716                         outl = user.len;
 717                         user.len = server->priv.len;
 718                         if (outl > user.len) outl = user.len;
 719                         if (outl) {
 720                                 if (copy_to_user(user.data,
 721                                                  server->priv.data,
 722                                                  outl)) return -EFAULT;
 723                         }
 724 #ifdef CONFIG_COMPAT
 725                         if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
 726                                 struct compat_ncp_privatedata_ioctl user32;
 727                                 user32.len = user.len;
 728                                 user32.data = (unsigned long) user.data;
 729                                 if (copy_to_user(&user32, argp, sizeof(user32)))
 730                                         return -EFAULT;
 731                         } else
 732 #endif
 733                         if (copy_to_user(argp, &user, sizeof(user)))
 734                                 return -EFAULT;
 735
 736                         return 0;
 737                 }
 738 #ifdef CONFIG_COMPAT
 739         case NCP_IOC_SETPRIVATEDATA_32:
 740 #endif
 741         case NCP_IOC_SETPRIVATEDATA:
 742                 if (current->uid != server->m.mounted_uid) {
 743                         return -EACCES;
 744                 }
 745                 {
 746                         struct ncp_privatedata_ioctl user;
 747                         void* new;
 748                         void* old;
 749                         size_t oldlen;
 750
 751 #ifdef CONFIG_COMPAT
 752                         if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
 753                                 struct compat_ncp_privatedata_ioctl user32;
 754                                 if (copy_from_user(&user32, argp, sizeof(user32)))
 755                                         return -EFAULT;
 756                                 user.len = user32.len;
 757                                 user.data = compat_ptr(user32.data);
 758                         } else
 759 #endif
 760                         if (copy_from_user(&user, argp, sizeof(user)))
 761                                 return -EFAULT;
 762
 763                         if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
 764                                 return -ENOMEM;
 765                         if (user.len) {
 766                                 new = kmalloc(user.len, GFP_USER);
 767                                 if (!new)
 768                                         return -ENOMEM;
 769                                 if (copy_from_user(new, user.data, user.len)) {
 770                                         kfree(new);
 771                                         return -EFAULT;
 772                                 }
 773                         } else {
 774                                 new = NULL;
 775                         }
 776                         /* enter critical section */
 777                         old = server->priv.data;
 778                         oldlen = server->priv.len;
 779                         server->priv.len = user.len;
 780                         server->priv.data = new;
 781                         /* leave critical section */
 782                         kfree(old);
 783                         return 0;
 784                 }
 785
 786 #ifdef CONFIG_NCPFS_NLS
 787         case NCP_IOC_SETCHARSETS:
 788                 return ncp_set_charsets(server, argp);
 789
 790         case NCP_IOC_GETCHARSETS:
 791                 return ncp_get_charsets(server, argp);
 792
 793 #endif /* CONFIG_NCPFS_NLS */
 794
 795         case NCP_IOC_SETDENTRYTTL:
 796                 if ((file_permission(filp, MAY_WRITE) != 0) &&
 797                                  (current->uid != server->m.mounted_uid))
 798                         return -EACCES;
 799                 {
 800                         u_int32_t user;
 801
 802                         if (copy_from_user(&user, argp, sizeof(user)))
 803                                 return -EFAULT;
 804                         /* 20 secs at most... */
 805                         if (user > 20000)
 806                                 return -EINVAL;
 807                         user = (user * HZ) / 1000;
 808                         server->dentry_ttl = user;
 809                         return 0;
 810                 }
 811
 812         case NCP_IOC_GETDENTRYTTL:
 813                 {
 814                         u_int32_t user = (server->dentry_ttl * 1000) / HZ;
 815                         if (copy_to_user(argp, &user, sizeof(user)))
 816                                 return -EFAULT;
 817                         return 0;
 818                 }
 819
 820         }
 821         return -EINVAL;
 822 }
 823
 824 #ifdef CONFIG_COMPAT
 825 long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 826 {
 827         struct inode *inode = file->f_dentry->d_inode;
 828         int ret;
 829
 830         lock_kernel();
 831         arg = (unsigned long) compat_ptr(arg);
 832         ret = ncp_ioctl(inode, file, cmd, arg);
 833         unlock_kernel();
 834         return ret;
 835 }
 836 #endif