source/modules/vfs_cap.c

   1 /*
   2  * CAP VFS module for Samba 3.x Version 0.3
   3  *
   4  * Copyright (C) Tim Potter, 1999-2000
   5  * Copyright (C) Alexander Bokovoy, 2002-2003
   6  * Copyright (C) Stefan (metze) Metzmacher, 2003
   7  * Copyright (C) TAKAHASHI Motonobu (monyo), 2003
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24
  25 #include "includes.h"
  26
  27 /* cap functions */
  28 static char *capencode(char *to, const char *from);
  29 static char *capdecode(char *to, const char *from);
  30
  31 static SMB_BIG_UINT cap_disk_free(vfs_handle_struct *handle, const char *path,
  32         BOOL small_query, SMB_BIG_UINT *bsize,
  33         SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize)
  34 {
  35         pstring cappath;
  36         capencode(cappath, path);
  37         return SMB_VFS_NEXT_DISK_FREE(handle, cappath, small_query, bsize,
  38                                          dfree, dsize);
  39 }
  40
  41 static SMB_STRUCT_DIR *cap_opendir(vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attr)
  42 {
  43         pstring capname;
  44         capencode(capname, fname);
  45         return SMB_VFS_NEXT_OPENDIR(handle, capname, mask, attr);
  46 }
  47
  48 static SMB_STRUCT_DIRENT *cap_readdir(vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp)
  49 {
  50         SMB_STRUCT_DIRENT *result;
  51         DEBUG(3,("cap: cap_readdir\n"));
  52         result = SMB_VFS_NEXT_READDIR(handle, dirp);
  53         if (result) {
  54           DEBUG(3,("cap: cap_readdir: %s\n", result->d_name));
  55           capdecode(result->d_name, result->d_name);
  56         }
  57         return result;
  58 }
  59
  60 static int cap_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode)
  61 {
  62         pstring cappath;
  63         capencode(cappath, path);
  64         return SMB_VFS_NEXT_MKDIR(handle, cappath, mode);
  65 }
  66
  67 static int cap_rmdir(vfs_handle_struct *handle, const char *path)
  68 {
  69         pstring cappath;
  70         capencode(cappath, path);
  71         return SMB_VFS_NEXT_RMDIR(handle, cappath);
  72 }
  73
  74 static int cap_open(vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode)
  75 {
  76         pstring capname;
  77         DEBUG(3,("cap: cap_open for %s\n", fname));
  78         capencode(capname, fname);
  79         return SMB_VFS_NEXT_OPEN(handle, capname, fsp, flags, mode);
  80 }
  81
  82 static int cap_rename(vfs_handle_struct *handle, const char *oldname, const char *newname)
  83 {
  84         pstring capold, capnew;
  85         capencode(capold, oldname);
  86         capencode(capnew, newname);
  87
  88         return SMB_VFS_NEXT_RENAME(handle, capold, capnew);
  89 }
  90
  91 static int cap_stat(vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf)
  92 {
  93         pstring capname;
  94         capencode(capname, fname);
  95         return SMB_VFS_NEXT_STAT(handle, capname, sbuf);
  96 }
  97
  98 static int cap_lstat(vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf)
  99 {
 100         pstring cappath;
 101         capencode(cappath, path);
 102         return SMB_VFS_NEXT_LSTAT(handle, cappath, sbuf);
 103 }
 104
 105 static int cap_unlink(vfs_handle_struct *handle, const char *path)
 106 {
 107         pstring cappath;
 108         capencode(cappath, path);
 109         return SMB_VFS_NEXT_UNLINK(handle, cappath);
 110 }
 111
 112 static int cap_chmod(vfs_handle_struct *handle, const char *path, mode_t mode)
 113 {
 114         pstring cappath;
 115         capencode(cappath, path);
 116         return SMB_VFS_NEXT_CHMOD(handle, cappath, mode);
 117 }
 118
 119 static int cap_chown(vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid)
 120 {
 121         pstring cappath;
 122         capencode(cappath, path);
 123         return SMB_VFS_NEXT_CHOWN(handle, cappath, uid, gid);
 124 }
 125
 126 static int cap_chdir(vfs_handle_struct *handle, const char *path)
 127 {
 128         pstring cappath;
 129         DEBUG(3,("cap: cap_chdir for %s\n", path));
 130         capencode(cappath, path);
 131         return SMB_VFS_NEXT_CHDIR(handle, cappath);
 132 }
 133
 134 static int cap_ntimes(vfs_handle_struct *handle, const char *path, const struct timespec ts[2])
 135 {
 136         pstring cappath;
 137         capencode(cappath, path);
 138         return SMB_VFS_NEXT_NTIMES(handle, cappath, ts);
 139 }
 140
 141
 142 static BOOL cap_symlink(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
 143 {
 144         pstring capoldpath, capnewpath;
 145         capencode(capoldpath, oldpath);
 146         capencode(capnewpath, newpath);
 147         return SMB_VFS_NEXT_SYMLINK(handle, capoldpath, capnewpath);
 148 }
 149
 150 static BOOL cap_readlink(vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz)
 151 {
 152         pstring cappath;
 153         capencode(cappath, path);
 154         return SMB_VFS_NEXT_READLINK(handle, cappath, buf, bufsiz);
 155 }
 156
 157 static int cap_link(vfs_handle_struct *handle, const char *oldpath, const char *newpath)
 158 {
 159         pstring capoldpath, capnewpath;
 160         capencode(capoldpath, oldpath);
 161         capencode(capnewpath, newpath);
 162         return SMB_VFS_NEXT_LINK(handle, capoldpath, capnewpath);
 163 }
 164
 165 static int cap_mknod(vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev)
 166 {
 167         pstring cappath;
 168         capencode(cappath, path);
 169         return SMB_VFS_NEXT_MKNOD(handle, cappath, mode, dev);
 170 }
 171
 172 static char *cap_realpath(vfs_handle_struct *handle, const char *path, char *resolved_path)
 173 {
 174         /* monyo need capencode'ed and capdecode'ed? */
 175         pstring cappath;
 176         capencode(cappath, path);
 177         return SMB_VFS_NEXT_REALPATH(handle, path, resolved_path);
 178 }
 179
 180 static BOOL cap_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp, const char *name, uint32 security_info_sent, struct security_descriptor_info *psd)
 181 {
 182         pstring capname;
 183         capencode(capname, name);
 184         return SMB_VFS_NEXT_SET_NT_ACL(handle, fsp, capname, security_info_sent, psd);
 185 }
 186
 187 static int cap_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode)
 188 {
 189         pstring capname;
 190         capencode(capname, name);
 191
 192         /* If the underlying VFS doesn't have ACL support... */
 193         if (!handle->vfs_next.ops.chmod_acl) {
 194                 errno = ENOSYS;
 195                 return -1;
 196         }
 197         return SMB_VFS_NEXT_CHMOD_ACL(handle, capname, mode);
 198 }
 199
 200 static SMB_ACL_T cap_sys_acl_get_file(vfs_handle_struct *handle, const char *path_p, SMB_ACL_TYPE_T type)
 201 {
 202         pstring cappath_p;
 203         capencode(cappath_p, path_p);
 204         return SMB_VFS_NEXT_SYS_ACL_GET_FILE(handle, cappath_p, type);
 205 }
 206
 207 static int cap_sys_acl_set_file(vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
 208 {
 209         pstring capname;
 210         capencode(capname, name);
 211         return SMB_VFS_NEXT_SYS_ACL_SET_FILE(handle, capname, acltype, theacl);
 212 }
 213
 214 static int cap_sys_acl_delete_def_file(vfs_handle_struct *handle, const char *path)
 215 {
 216         pstring cappath;
 217         capencode(cappath, path);
 218         return SMB_VFS_NEXT_SYS_ACL_DELETE_DEF_FILE(handle, cappath);
 219 }
 220
 221 static ssize_t cap_getxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t size)
 222 {
 223         pstring cappath, capname;
 224         capencode(cappath, path);
 225         capencode(capname, name);
 226         return SMB_VFS_NEXT_GETXATTR(handle, cappath, capname, value, size);
 227 }
 228
 229 static ssize_t cap_lgetxattr(vfs_handle_struct *handle, const char *path, const char *name, void *value, size_t
 230 size)
 231 {
 232         pstring cappath, capname;
 233         capencode(cappath, path);
 234         capencode(capname, name);
 235         return SMB_VFS_NEXT_LGETXATTR(handle, cappath, capname, value, size);
 236 }
 237
 238 static ssize_t cap_fgetxattr(vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size)
 239 {
 240         pstring capname;
 241         capencode(capname, name);
 242         return SMB_VFS_NEXT_FGETXATTR(handle, fsp, fd, capname, value, size);
 243 }
 244
 245 static ssize_t cap_listxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
 246 {
 247         pstring cappath;
 248         capencode(cappath, path);
 249         return SMB_VFS_NEXT_LISTXATTR(handle, cappath, list, size);
 250 }
 251
 252 static ssize_t cap_llistxattr(vfs_handle_struct *handle, const char *path, char *list, size_t size)
 253 {
 254         pstring cappath;
 255         capencode(cappath, path);
 256         return SMB_VFS_NEXT_LLISTXATTR(handle, cappath, list, size);
 257 }
 258
 259 static int cap_removexattr(vfs_handle_struct *handle, const char *path, const char *name)
 260 {
 261         pstring cappath, capname;
 262         capencode(cappath, path);
 263         capencode(capname, name);
 264         return SMB_VFS_NEXT_REMOVEXATTR(handle, cappath, capname);
 265 }
 266
 267 static int cap_lremovexattr(vfs_handle_struct *handle, const char *path, const char *name)
 268 {
 269         pstring cappath, capname;
 270         capencode(cappath, path);
 271         capencode(capname, name);
 272         return SMB_VFS_NEXT_LREMOVEXATTR(handle, cappath, capname);
 273 }
 274
 275 static int cap_fremovexattr(vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name)
 276 {
 277         pstring capname;
 278         capencode(capname, name);
 279         return SMB_VFS_NEXT_FREMOVEXATTR(handle, fsp, fd, capname);
 280 }
 281
 282 static int cap_setxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
 283 {
 284         pstring cappath, capname;
 285         capencode(cappath, path);
 286         capencode(capname, name);
 287         return SMB_VFS_NEXT_SETXATTR(handle, cappath, capname, value, size, flags);
 288 }
 289
 290 static int cap_lsetxattr(vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags)
 291 {
 292         pstring cappath, capname;
 293         capencode(cappath, path);
 294         capencode(capname, name);
 295         return SMB_VFS_NEXT_LSETXATTR(handle, cappath, capname, value, size, flags);
 296 }
 297
 298 static int cap_fsetxattr(vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, const void *value, size_t size, int flags)
 299 {
 300         pstring capname;
 301         capencode(capname, name);
 302         return SMB_VFS_NEXT_FSETXATTR(handle, fsp, fd, capname, value, size, flags);
 303 }
 304
 305 /* VFS operations structure */
 306
 307 static vfs_op_tuple cap_op_tuples[] = {
 308
 309         /* Disk operations */
 310
 311         {SMB_VFS_OP(cap_disk_free),                     SMB_VFS_OP_DISK_FREE,           SMB_VFS_LAYER_TRANSPARENT},
 312
 313         /* Directory operations */
 314
 315         {SMB_VFS_OP(cap_opendir),                       SMB_VFS_OP_OPENDIR,             SMB_VFS_LAYER_TRANSPARENT},
 316         {SMB_VFS_OP(cap_readdir),                       SMB_VFS_OP_READDIR,             SMB_VFS_LAYER_TRANSPARENT},
 317         {SMB_VFS_OP(cap_mkdir),                 SMB_VFS_OP_MKDIR,               SMB_VFS_LAYER_TRANSPARENT},
 318         {SMB_VFS_OP(cap_rmdir),                 SMB_VFS_OP_RMDIR,               SMB_VFS_LAYER_TRANSPARENT},
 319
 320         /* File operations */
 321
 322         {SMB_VFS_OP(cap_open),                          SMB_VFS_OP_OPEN,                SMB_VFS_LAYER_TRANSPARENT},
 323         {SMB_VFS_OP(cap_rename),                        SMB_VFS_OP_RENAME,              SMB_VFS_LAYER_TRANSPARENT},
 324         {SMB_VFS_OP(cap_stat),                          SMB_VFS_OP_STAT,                SMB_VFS_LAYER_TRANSPARENT},
 325         {SMB_VFS_OP(cap_lstat),                 SMB_VFS_OP_LSTAT,               SMB_VFS_LAYER_TRANSPARENT},
 326         {SMB_VFS_OP(cap_unlink),                        SMB_VFS_OP_UNLINK,              SMB_VFS_LAYER_TRANSPARENT},
 327         {SMB_VFS_OP(cap_chmod),                 SMB_VFS_OP_CHMOD,               SMB_VFS_LAYER_TRANSPARENT},
 328         {SMB_VFS_OP(cap_chown),                 SMB_VFS_OP_CHOWN,               SMB_VFS_LAYER_TRANSPARENT},
 329         {SMB_VFS_OP(cap_chdir),                 SMB_VFS_OP_CHDIR,               SMB_VFS_LAYER_TRANSPARENT},
 330         {SMB_VFS_OP(cap_ntimes),                        SMB_VFS_OP_NTIMES,              SMB_VFS_LAYER_TRANSPARENT},
 331         {SMB_VFS_OP(cap_symlink),                       SMB_VFS_OP_SYMLINK,             SMB_VFS_LAYER_TRANSPARENT},
 332         {SMB_VFS_OP(cap_readlink),                      SMB_VFS_OP_READLINK,            SMB_VFS_LAYER_TRANSPARENT},
 333         {SMB_VFS_OP(cap_link),                          SMB_VFS_OP_LINK,                SMB_VFS_LAYER_TRANSPARENT},
 334         {SMB_VFS_OP(cap_mknod),                 SMB_VFS_OP_MKNOD,               SMB_VFS_LAYER_TRANSPARENT},
 335         {SMB_VFS_OP(cap_realpath),                      SMB_VFS_OP_REALPATH,            SMB_VFS_LAYER_TRANSPARENT},
 336
 337         /* NT File ACL operations */
 338
 339         {SMB_VFS_OP(cap_set_nt_acl),                    SMB_VFS_OP_SET_NT_ACL,          SMB_VFS_LAYER_TRANSPARENT},
 340
 341         /* POSIX ACL operations */
 342
 343         {SMB_VFS_OP(cap_chmod_acl),                     SMB_VFS_OP_CHMOD_ACL,           SMB_VFS_LAYER_TRANSPARENT},
 344
 345         {SMB_VFS_OP(cap_sys_acl_get_file),              SMB_VFS_OP_SYS_ACL_GET_FILE,            SMB_VFS_LAYER_TRANSPARENT},
 346         {SMB_VFS_OP(cap_sys_acl_set_file),              SMB_VFS_OP_SYS_ACL_SET_FILE,            SMB_VFS_LAYER_TRANSPARENT},
 347         {SMB_VFS_OP(cap_sys_acl_delete_def_file),       SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,     SMB_VFS_LAYER_TRANSPARENT},
 348
 349         /* EA operations. */
 350         {SMB_VFS_OP(cap_getxattr),                      SMB_VFS_OP_GETXATTR,                    SMB_VFS_LAYER_TRANSPARENT},
 351         {SMB_VFS_OP(cap_lgetxattr),                     SMB_VFS_OP_LGETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 352         {SMB_VFS_OP(cap_fgetxattr),                     SMB_VFS_OP_FGETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 353         {SMB_VFS_OP(cap_listxattr),                     SMB_VFS_OP_LISTXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 354         {SMB_VFS_OP(cap_llistxattr),                    SMB_VFS_OP_LLISTXATTR,                  SMB_VFS_LAYER_TRANSPARENT},
 355         {SMB_VFS_OP(cap_removexattr),                   SMB_VFS_OP_REMOVEXATTR,                 SMB_VFS_LAYER_TRANSPARENT},
 356         {SMB_VFS_OP(cap_lremovexattr),                  SMB_VFS_OP_LREMOVEXATTR,                SMB_VFS_LAYER_TRANSPARENT},
 357         {SMB_VFS_OP(cap_fremovexattr),                  SMB_VFS_OP_FREMOVEXATTR,                SMB_VFS_LAYER_TRANSPARENT},
 358         {SMB_VFS_OP(cap_setxattr),                      SMB_VFS_OP_SETXATTR,                    SMB_VFS_LAYER_TRANSPARENT},
 359         {SMB_VFS_OP(cap_lsetxattr),                     SMB_VFS_OP_LSETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 360         {SMB_VFS_OP(cap_fsetxattr),                     SMB_VFS_OP_FSETXATTR,                   SMB_VFS_LAYER_TRANSPARENT},
 361
 362         {NULL,                                          SMB_VFS_OP_NOOP,                        SMB_VFS_LAYER_NOOP}
 363 };
 364
 365 NTSTATUS vfs_cap_init(void);
 366 NTSTATUS vfs_cap_init(void)
 367 {
 368         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "cap", cap_op_tuples);
 369 }
 370
 371 /* For CAP functions */
 372 #define hex_tag ':'
 373 #define hex2bin(c)              hex2bin_table[(unsigned char)(c)]
 374 #define bin2hex(c)              bin2hex_table[(unsigned char)(c)]
 375 #define is_hex(s)               ((s)[0] == hex_tag)
 376
 377 static unsigned char hex2bin_table[256] = {
 378 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 */
 379 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 */
 380 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 */
 381 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0, /* 0x30 */
 382 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x40 */
 383 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 384 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 */
 385 0000, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0000, /* 0x60 */
 386 0000, 0000, 0000, 0000, 0000, 0000, 0000, 0000,
 387 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 */
 388 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 */
 389 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 */
 390 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 */
 391 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 */
 392 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 */
 393 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 */
 394 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 */
 395 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 */
 396 };
 397 static unsigned char bin2hex_table[256] = "0123456789abcdef";
 398
 399 /*******************************************************************
 400   original code -> ":xx"  - CAP format
 401 ********************************************************************/
 402 static char *capencode(char *to, const char *from)
 403 {
 404   pstring cvtbuf;
 405   char *out;
 406
 407   if (to == from) {
 408     from = pstrcpy ((char *) cvtbuf, from);
 409   }
 410
 411   for (out = to; *from && (out - to < sizeof(pstring)-7);) {
 412     /* buffer husoku error */
 413     if ((unsigned char)*from >= 0x80) {
 414       *out++ = hex_tag;
 415       *out++ = bin2hex (((*from)>>4)&0x0f);
 416       *out++ = bin2hex ((*from)&0x0f);
 417       from++;
 418     }
 419     else {
 420       *out++ = *from++;
 421     }
 422   }
 423   *out = '\0';
 424   return to;
 425 }
 426
 427 /*******************************************************************
 428   CAP -> original code
 429 ********************************************************************/
 430 /* ":xx" -> a byte */
 431 static char *capdecode(char *to, const char *from)
 432 {
 433   pstring cvtbuf;
 434   char *out;
 435
 436   if (to == from) {
 437     from = pstrcpy ((char *) cvtbuf, from);
 438   }
 439   for (out = to; *from && (out - to < sizeof(pstring)-3);) {
 440     if (is_hex(from)) {
 441       *out++ = (hex2bin (from[1])<<4) | (hex2bin (from[2]));
 442       from += 3;
 443     } else {
 444       *out++ = *from++;
 445     }
 446   }
 447   *out = '\0';
 448   return to;
 449 }