| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * security/tomoyo/file.c |
| 4 | * |
| 5 | * Copyright (C) 2005-2011 NTT DATA CORPORATION |
| 6 | */ |
| 7 | |
| 8 | #include "common.h" |
| 9 | #include <linux/slab.h> |
| 10 | |
| 11 | /* |
| 12 | * Mapping table from "enum tomoyo_path_acl_index" to "enum tomoyo_mac_index". |
| 13 | */ |
| 14 | static const u8 tomoyo_p2mac[TOMOYO_MAX_PATH_OPERATION] = { |
| 15 | [TOMOYO_TYPE_EXECUTE] = TOMOYO_MAC_FILE_EXECUTE, |
| 16 | [TOMOYO_TYPE_READ] = TOMOYO_MAC_FILE_OPEN, |
| 17 | [TOMOYO_TYPE_WRITE] = TOMOYO_MAC_FILE_OPEN, |
| 18 | [TOMOYO_TYPE_APPEND] = TOMOYO_MAC_FILE_OPEN, |
| 19 | [TOMOYO_TYPE_UNLINK] = TOMOYO_MAC_FILE_UNLINK, |
| 20 | [TOMOYO_TYPE_GETATTR] = TOMOYO_MAC_FILE_GETATTR, |
| 21 | [TOMOYO_TYPE_RMDIR] = TOMOYO_MAC_FILE_RMDIR, |
| 22 | [TOMOYO_TYPE_TRUNCATE] = TOMOYO_MAC_FILE_TRUNCATE, |
| 23 | [TOMOYO_TYPE_SYMLINK] = TOMOYO_MAC_FILE_SYMLINK, |
| 24 | [TOMOYO_TYPE_CHROOT] = TOMOYO_MAC_FILE_CHROOT, |
| 25 | [TOMOYO_TYPE_UMOUNT] = TOMOYO_MAC_FILE_UMOUNT, |
| 26 | }; |
| 27 | |
| 28 | /* |
| 29 | * Mapping table from "enum tomoyo_mkdev_acl_index" to "enum tomoyo_mac_index". |
| 30 | */ |
| 31 | const u8 tomoyo_pnnn2mac[TOMOYO_MAX_MKDEV_OPERATION] = { |
| 32 | [TOMOYO_TYPE_MKBLOCK] = TOMOYO_MAC_FILE_MKBLOCK, |
| 33 | [TOMOYO_TYPE_MKCHAR] = TOMOYO_MAC_FILE_MKCHAR, |
| 34 | }; |
| 35 | |
| 36 | /* |
| 37 | * Mapping table from "enum tomoyo_path2_acl_index" to "enum tomoyo_mac_index". |
| 38 | */ |
| 39 | const u8 tomoyo_pp2mac[TOMOYO_MAX_PATH2_OPERATION] = { |
| 40 | [TOMOYO_TYPE_LINK] = TOMOYO_MAC_FILE_LINK, |
| 41 | [TOMOYO_TYPE_RENAME] = TOMOYO_MAC_FILE_RENAME, |
| 42 | [TOMOYO_TYPE_PIVOT_ROOT] = TOMOYO_MAC_FILE_PIVOT_ROOT, |
| 43 | }; |
| 44 | |
| 45 | /* |
| 46 | * Mapping table from "enum tomoyo_path_number_acl_index" to |
| 47 | * "enum tomoyo_mac_index". |
| 48 | */ |
| 49 | const u8 tomoyo_pn2mac[TOMOYO_MAX_PATH_NUMBER_OPERATION] = { |
| 50 | [TOMOYO_TYPE_CREATE] = TOMOYO_MAC_FILE_CREATE, |
| 51 | [TOMOYO_TYPE_MKDIR] = TOMOYO_MAC_FILE_MKDIR, |
| 52 | [TOMOYO_TYPE_MKFIFO] = TOMOYO_MAC_FILE_MKFIFO, |
| 53 | [TOMOYO_TYPE_MKSOCK] = TOMOYO_MAC_FILE_MKSOCK, |
| 54 | [TOMOYO_TYPE_IOCTL] = TOMOYO_MAC_FILE_IOCTL, |
| 55 | [TOMOYO_TYPE_CHMOD] = TOMOYO_MAC_FILE_CHMOD, |
| 56 | [TOMOYO_TYPE_CHOWN] = TOMOYO_MAC_FILE_CHOWN, |
| 57 | [TOMOYO_TYPE_CHGRP] = TOMOYO_MAC_FILE_CHGRP, |
| 58 | }; |
| 59 | |
| 60 | /** |
| 61 | * tomoyo_put_name_union - Drop reference on "struct tomoyo_name_union". |
| 62 | * |
| 63 | * @ptr: Pointer to "struct tomoyo_name_union". |
| 64 | * |
| 65 | * Returns nothing. |
| 66 | */ |
| 67 | void tomoyo_put_name_union(struct tomoyo_name_union *ptr) |
| 68 | { |
| 69 | tomoyo_put_group(ptr->group); |
| 70 | tomoyo_put_name(ptr->filename); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * tomoyo_compare_name_union - Check whether a name matches "struct tomoyo_name_union" or not. |
| 75 | * |
| 76 | * @name: Pointer to "struct tomoyo_path_info". |
| 77 | * @ptr: Pointer to "struct tomoyo_name_union". |
| 78 | * |
| 79 | * Returns "struct tomoyo_path_info" if @name matches @ptr, NULL otherwise. |
| 80 | */ |
| 81 | const struct tomoyo_path_info * |
| 82 | tomoyo_compare_name_union(const struct tomoyo_path_info *name, |
| 83 | const struct tomoyo_name_union *ptr) |
| 84 | { |
| 85 | if (ptr->group) |
| 86 | return tomoyo_path_matches_group(name, ptr->group); |
| 87 | if (tomoyo_path_matches_pattern(name, ptr->filename)) |
| 88 | return ptr->filename; |
| 89 | return NULL; |
| 90 | } |
| 91 | |
| 92 | /** |
| 93 | * tomoyo_put_number_union - Drop reference on "struct tomoyo_number_union". |
| 94 | * |
| 95 | * @ptr: Pointer to "struct tomoyo_number_union". |
| 96 | * |
| 97 | * Returns nothing. |
| 98 | */ |
| 99 | void tomoyo_put_number_union(struct tomoyo_number_union *ptr) |
| 100 | { |
| 101 | tomoyo_put_group(ptr->group); |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * tomoyo_compare_number_union - Check whether a value matches "struct tomoyo_number_union" or not. |
| 106 | * |
| 107 | * @value: Number to check. |
| 108 | * @ptr: Pointer to "struct tomoyo_number_union". |
| 109 | * |
| 110 | * Returns true if @value matches @ptr, false otherwise. |
| 111 | */ |
| 112 | bool tomoyo_compare_number_union(const unsigned long value, |
| 113 | const struct tomoyo_number_union *ptr) |
| 114 | { |
| 115 | if (ptr->group) |
| 116 | return tomoyo_number_matches_group(value, value, ptr->group); |
| 117 | return value >= ptr->values[0] && value <= ptr->values[1]; |
| 118 | } |
| 119 | |
| 120 | /** |
| 121 | * tomoyo_add_slash - Add trailing '/' if needed. |
| 122 | * |
| 123 | * @buf: Pointer to "struct tomoyo_path_info". |
| 124 | * |
| 125 | * Returns nothing. |
| 126 | * |
| 127 | * @buf must be generated by tomoyo_encode() because this function does not |
| 128 | * allocate memory for adding '/'. |
| 129 | */ |
| 130 | static void tomoyo_add_slash(struct tomoyo_path_info *buf) |
| 131 | { |
| 132 | if (buf->is_dir) |
| 133 | return; |
| 134 | /* |
| 135 | * This is OK because tomoyo_encode() reserves space for appending "/". |
| 136 | */ |
| 137 | strcat((char *) buf->name, "/"); |
| 138 | tomoyo_fill_path_info(buf); |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * tomoyo_get_realpath - Get realpath. |
| 143 | * |
| 144 | * @buf: Pointer to "struct tomoyo_path_info". |
| 145 | * @path: Pointer to "struct path". |
| 146 | * |
| 147 | * Returns true on success, false otherwise. |
| 148 | */ |
| 149 | static bool tomoyo_get_realpath(struct tomoyo_path_info *buf, const struct path *path) |
| 150 | { |
| 151 | buf->name = tomoyo_realpath_from_path(path); |
| 152 | if (buf->name) { |
| 153 | tomoyo_fill_path_info(buf); |
| 154 | return true; |
| 155 | } |
| 156 | return false; |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * tomoyo_audit_path_log - Audit path request log. |
| 161 | * |
| 162 | * @r: Pointer to "struct tomoyo_request_info". |
| 163 | * |
| 164 | * Returns 0 on success, negative value otherwise. |
| 165 | */ |
| 166 | static int tomoyo_audit_path_log(struct tomoyo_request_info *r) |
| 167 | { |
| 168 | return tomoyo_supervisor(r, "file %s %s\n", tomoyo_path_keyword |
| 169 | [r->param.path.operation], |
| 170 | r->param.path.filename->name); |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * tomoyo_audit_path2_log - Audit path/path request log. |
| 175 | * |
| 176 | * @r: Pointer to "struct tomoyo_request_info". |
| 177 | * |
| 178 | * Returns 0 on success, negative value otherwise. |
| 179 | */ |
| 180 | static int tomoyo_audit_path2_log(struct tomoyo_request_info *r) |
| 181 | { |
| 182 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
| 183 | [tomoyo_pp2mac[r->param.path2.operation]], |
| 184 | r->param.path2.filename1->name, |
| 185 | r->param.path2.filename2->name); |
| 186 | } |
| 187 | |
| 188 | /** |
| 189 | * tomoyo_audit_mkdev_log - Audit path/number/number/number request log. |
| 190 | * |
| 191 | * @r: Pointer to "struct tomoyo_request_info". |
| 192 | * |
| 193 | * Returns 0 on success, negative value otherwise. |
| 194 | */ |
| 195 | static int tomoyo_audit_mkdev_log(struct tomoyo_request_info *r) |
| 196 | { |
| 197 | return tomoyo_supervisor(r, "file %s %s 0%o %u %u\n", |
| 198 | tomoyo_mac_keywords |
| 199 | [tomoyo_pnnn2mac[r->param.mkdev.operation]], |
| 200 | r->param.mkdev.filename->name, |
| 201 | r->param.mkdev.mode, r->param.mkdev.major, |
| 202 | r->param.mkdev.minor); |
| 203 | } |
| 204 | |
| 205 | /** |
| 206 | * tomoyo_audit_path_number_log - Audit path/number request log. |
| 207 | * |
| 208 | * @r: Pointer to "struct tomoyo_request_info". |
| 209 | * |
| 210 | * Returns 0 on success, negative value otherwise. |
| 211 | */ |
| 212 | static int tomoyo_audit_path_number_log(struct tomoyo_request_info *r) |
| 213 | { |
| 214 | const u8 type = r->param.path_number.operation; |
| 215 | u8 radix; |
| 216 | char buffer[64]; |
| 217 | |
| 218 | switch (type) { |
| 219 | case TOMOYO_TYPE_CREATE: |
| 220 | case TOMOYO_TYPE_MKDIR: |
| 221 | case TOMOYO_TYPE_MKFIFO: |
| 222 | case TOMOYO_TYPE_MKSOCK: |
| 223 | case TOMOYO_TYPE_CHMOD: |
| 224 | radix = TOMOYO_VALUE_TYPE_OCTAL; |
| 225 | break; |
| 226 | case TOMOYO_TYPE_IOCTL: |
| 227 | radix = TOMOYO_VALUE_TYPE_HEXADECIMAL; |
| 228 | break; |
| 229 | default: |
| 230 | radix = TOMOYO_VALUE_TYPE_DECIMAL; |
| 231 | break; |
| 232 | } |
| 233 | tomoyo_print_ulong(buffer, sizeof(buffer), r->param.path_number.number, |
| 234 | radix); |
| 235 | return tomoyo_supervisor(r, "file %s %s %s\n", tomoyo_mac_keywords |
| 236 | [tomoyo_pn2mac[type]], |
| 237 | r->param.path_number.filename->name, buffer); |
| 238 | } |
| 239 | |
| 240 | /** |
| 241 | * tomoyo_check_path_acl - Check permission for path operation. |
| 242 | * |
| 243 | * @r: Pointer to "struct tomoyo_request_info". |
| 244 | * @ptr: Pointer to "struct tomoyo_acl_info". |
| 245 | * |
| 246 | * Returns true if granted, false otherwise. |
| 247 | * |
| 248 | * To be able to use wildcard for domain transition, this function sets |
| 249 | * matching entry on success. Since the caller holds tomoyo_read_lock(), |
| 250 | * it is safe to set matching entry. |
| 251 | */ |
| 252 | static bool tomoyo_check_path_acl(struct tomoyo_request_info *r, |
| 253 | const struct tomoyo_acl_info *ptr) |
| 254 | { |
| 255 | const struct tomoyo_path_acl *acl = container_of(ptr, typeof(*acl), |
| 256 | head); |
| 257 | |
| 258 | if (acl->perm & (1 << r->param.path.operation)) { |
| 259 | r->param.path.matched_path = |
| 260 | tomoyo_compare_name_union(r->param.path.filename, |
| 261 | &acl->name); |
| 262 | return r->param.path.matched_path != NULL; |
| 263 | } |
| 264 | return false; |
| 265 | } |
| 266 | |
| 267 | /** |
| 268 | * tomoyo_check_path_number_acl - Check permission for path number operation. |
| 269 | * |
| 270 | * @r: Pointer to "struct tomoyo_request_info". |
| 271 | * @ptr: Pointer to "struct tomoyo_acl_info". |
| 272 | * |
| 273 | * Returns true if granted, false otherwise. |
| 274 | */ |
| 275 | static bool tomoyo_check_path_number_acl(struct tomoyo_request_info *r, |
| 276 | const struct tomoyo_acl_info *ptr) |
| 277 | { |
| 278 | const struct tomoyo_path_number_acl *acl = |
| 279 | container_of(ptr, typeof(*acl), head); |
| 280 | |
| 281 | return (acl->perm & (1 << r->param.path_number.operation)) && |
| 282 | tomoyo_compare_number_union(r->param.path_number.number, |
| 283 | &acl->number) && |
| 284 | tomoyo_compare_name_union(r->param.path_number.filename, |
| 285 | &acl->name); |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * tomoyo_check_path2_acl - Check permission for path path operation. |
| 290 | * |
| 291 | * @r: Pointer to "struct tomoyo_request_info". |
| 292 | * @ptr: Pointer to "struct tomoyo_acl_info". |
| 293 | * |
| 294 | * Returns true if granted, false otherwise. |
| 295 | */ |
| 296 | static bool tomoyo_check_path2_acl(struct tomoyo_request_info *r, |
| 297 | const struct tomoyo_acl_info *ptr) |
| 298 | { |
| 299 | const struct tomoyo_path2_acl *acl = |
| 300 | container_of(ptr, typeof(*acl), head); |
| 301 | |
| 302 | return (acl->perm & (1 << r->param.path2.operation)) && |
| 303 | tomoyo_compare_name_union(r->param.path2.filename1, &acl->name1) |
| 304 | && tomoyo_compare_name_union(r->param.path2.filename2, |
| 305 | &acl->name2); |
| 306 | } |
| 307 | |
| 308 | /** |
| 309 | * tomoyo_check_mkdev_acl - Check permission for path number number number operation. |
| 310 | * |
| 311 | * @r: Pointer to "struct tomoyo_request_info". |
| 312 | * @ptr: Pointer to "struct tomoyo_acl_info". |
| 313 | * |
| 314 | * Returns true if granted, false otherwise. |
| 315 | */ |
| 316 | static bool tomoyo_check_mkdev_acl(struct tomoyo_request_info *r, |
| 317 | const struct tomoyo_acl_info *ptr) |
| 318 | { |
| 319 | const struct tomoyo_mkdev_acl *acl = |
| 320 | container_of(ptr, typeof(*acl), head); |
| 321 | |
| 322 | return (acl->perm & (1 << r->param.mkdev.operation)) && |
| 323 | tomoyo_compare_number_union(r->param.mkdev.mode, |
| 324 | &acl->mode) && |
| 325 | tomoyo_compare_number_union(r->param.mkdev.major, |
| 326 | &acl->major) && |
| 327 | tomoyo_compare_number_union(r->param.mkdev.minor, |
| 328 | &acl->minor) && |
| 329 | tomoyo_compare_name_union(r->param.mkdev.filename, |
| 330 | &acl->name); |
| 331 | } |
| 332 | |
| 333 | /** |
| 334 | * tomoyo_same_path_acl - Check for duplicated "struct tomoyo_path_acl" entry. |
| 335 | * |
| 336 | * @a: Pointer to "struct tomoyo_acl_info". |
| 337 | * @b: Pointer to "struct tomoyo_acl_info". |
| 338 | * |
| 339 | * Returns true if @a == @b except permission bits, false otherwise. |
| 340 | */ |
| 341 | static bool tomoyo_same_path_acl(const struct tomoyo_acl_info *a, |
| 342 | const struct tomoyo_acl_info *b) |
| 343 | { |
| 344 | const struct tomoyo_path_acl *p1 = container_of(a, typeof(*p1), head); |
| 345 | const struct tomoyo_path_acl *p2 = container_of(b, typeof(*p2), head); |
| 346 | |
| 347 | return tomoyo_same_name_union(&p1->name, &p2->name); |
| 348 | } |
| 349 | |
| 350 | /** |
| 351 | * tomoyo_merge_path_acl - Merge duplicated "struct tomoyo_path_acl" entry. |
| 352 | * |
| 353 | * @a: Pointer to "struct tomoyo_acl_info". |
| 354 | * @b: Pointer to "struct tomoyo_acl_info". |
| 355 | * @is_delete: True for @a &= ~@b, false for @a |= @b. |
| 356 | * |
| 357 | * Returns true if @a is empty, false otherwise. |
| 358 | */ |
| 359 | static bool tomoyo_merge_path_acl(struct tomoyo_acl_info *a, |
| 360 | struct tomoyo_acl_info *b, |
| 361 | const bool is_delete) |
| 362 | { |
| 363 | u16 * const a_perm = &container_of(a, struct tomoyo_path_acl, head) |
| 364 | ->perm; |
| 365 | u16 perm = READ_ONCE(*a_perm); |
| 366 | const u16 b_perm = container_of(b, struct tomoyo_path_acl, head)->perm; |
| 367 | |
| 368 | if (is_delete) |
| 369 | perm &= ~b_perm; |
| 370 | else |
| 371 | perm |= b_perm; |
| 372 | WRITE_ONCE(*a_perm, perm); |
| 373 | return !perm; |
| 374 | } |
| 375 | |
| 376 | /** |
| 377 | * tomoyo_update_path_acl - Update "struct tomoyo_path_acl" list. |
| 378 | * |
| 379 | * @perm: Permission. |
| 380 | * @param: Pointer to "struct tomoyo_acl_param". |
| 381 | * |
| 382 | * Returns 0 on success, negative value otherwise. |
| 383 | * |
| 384 | * Caller holds tomoyo_read_lock(). |
| 385 | */ |
| 386 | static int tomoyo_update_path_acl(const u16 perm, |
| 387 | struct tomoyo_acl_param *param) |
| 388 | { |
| 389 | struct tomoyo_path_acl e = { |
| 390 | .head.type = TOMOYO_TYPE_PATH_ACL, |
| 391 | .perm = perm |
| 392 | }; |
| 393 | int error; |
| 394 | |
| 395 | if (!tomoyo_parse_name_union(param, &e.name)) |
| 396 | error = -EINVAL; |
| 397 | else |
| 398 | error = tomoyo_update_domain(&e.head, sizeof(e), param, |
| 399 | tomoyo_same_path_acl, |
| 400 | tomoyo_merge_path_acl); |
| 401 | tomoyo_put_name_union(&e.name); |
| 402 | return error; |
| 403 | } |
| 404 | |
| 405 | /** |
| 406 | * tomoyo_same_mkdev_acl - Check for duplicated "struct tomoyo_mkdev_acl" entry. |
| 407 | * |
| 408 | * @a: Pointer to "struct tomoyo_acl_info". |
| 409 | * @b: Pointer to "struct tomoyo_acl_info". |
| 410 | * |
| 411 | * Returns true if @a == @b except permission bits, false otherwise. |
| 412 | */ |
| 413 | static bool tomoyo_same_mkdev_acl(const struct tomoyo_acl_info *a, |
| 414 | const struct tomoyo_acl_info *b) |
| 415 | { |
| 416 | const struct tomoyo_mkdev_acl *p1 = container_of(a, typeof(*p1), head); |
| 417 | const struct tomoyo_mkdev_acl *p2 = container_of(b, typeof(*p2), head); |
| 418 | |
| 419 | return tomoyo_same_name_union(&p1->name, &p2->name) && |
| 420 | tomoyo_same_number_union(&p1->mode, &p2->mode) && |
| 421 | tomoyo_same_number_union(&p1->major, &p2->major) && |
| 422 | tomoyo_same_number_union(&p1->minor, &p2->minor); |
| 423 | } |
| 424 | |
| 425 | /** |
| 426 | * tomoyo_merge_mkdev_acl - Merge duplicated "struct tomoyo_mkdev_acl" entry. |
| 427 | * |
| 428 | * @a: Pointer to "struct tomoyo_acl_info". |
| 429 | * @b: Pointer to "struct tomoyo_acl_info". |
| 430 | * @is_delete: True for @a &= ~@b, false for @a |= @b. |
| 431 | * |
| 432 | * Returns true if @a is empty, false otherwise. |
| 433 | */ |
| 434 | static bool tomoyo_merge_mkdev_acl(struct tomoyo_acl_info *a, |
| 435 | struct tomoyo_acl_info *b, |
| 436 | const bool is_delete) |
| 437 | { |
| 438 | u8 *const a_perm = &container_of(a, struct tomoyo_mkdev_acl, |
| 439 | head)->perm; |
| 440 | u8 perm = READ_ONCE(*a_perm); |
| 441 | const u8 b_perm = container_of(b, struct tomoyo_mkdev_acl, head) |
| 442 | ->perm; |
| 443 | |
| 444 | if (is_delete) |
| 445 | perm &= ~b_perm; |
| 446 | else |
| 447 | perm |= b_perm; |
| 448 | WRITE_ONCE(*a_perm, perm); |
| 449 | return !perm; |
| 450 | } |
| 451 | |
| 452 | /** |
| 453 | * tomoyo_update_mkdev_acl - Update "struct tomoyo_mkdev_acl" list. |
| 454 | * |
| 455 | * @perm: Permission. |
| 456 | * @param: Pointer to "struct tomoyo_acl_param". |
| 457 | * |
| 458 | * Returns 0 on success, negative value otherwise. |
| 459 | * |
| 460 | * Caller holds tomoyo_read_lock(). |
| 461 | */ |
| 462 | static int tomoyo_update_mkdev_acl(const u8 perm, |
| 463 | struct tomoyo_acl_param *param) |
| 464 | { |
| 465 | struct tomoyo_mkdev_acl e = { |
| 466 | .head.type = TOMOYO_TYPE_MKDEV_ACL, |
| 467 | .perm = perm |
| 468 | }; |
| 469 | int error; |
| 470 | |
| 471 | if (!tomoyo_parse_name_union(param, &e.name) || |
| 472 | !tomoyo_parse_number_union(param, &e.mode) || |
| 473 | !tomoyo_parse_number_union(param, &e.major) || |
| 474 | !tomoyo_parse_number_union(param, &e.minor)) |
| 475 | error = -EINVAL; |
| 476 | else |
| 477 | error = tomoyo_update_domain(&e.head, sizeof(e), param, |
| 478 | tomoyo_same_mkdev_acl, |
| 479 | tomoyo_merge_mkdev_acl); |
| 480 | tomoyo_put_name_union(&e.name); |
| 481 | tomoyo_put_number_union(&e.mode); |
| 482 | tomoyo_put_number_union(&e.major); |
| 483 | tomoyo_put_number_union(&e.minor); |
| 484 | return error; |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * tomoyo_same_path2_acl - Check for duplicated "struct tomoyo_path2_acl" entry. |
| 489 | * |
| 490 | * @a: Pointer to "struct tomoyo_acl_info". |
| 491 | * @b: Pointer to "struct tomoyo_acl_info". |
| 492 | * |
| 493 | * Returns true if @a == @b except permission bits, false otherwise. |
| 494 | */ |
| 495 | static bool tomoyo_same_path2_acl(const struct tomoyo_acl_info *a, |
| 496 | const struct tomoyo_acl_info *b) |
| 497 | { |
| 498 | const struct tomoyo_path2_acl *p1 = container_of(a, typeof(*p1), head); |
| 499 | const struct tomoyo_path2_acl *p2 = container_of(b, typeof(*p2), head); |
| 500 | |
| 501 | return tomoyo_same_name_union(&p1->name1, &p2->name1) && |
| 502 | tomoyo_same_name_union(&p1->name2, &p2->name2); |
| 503 | } |
| 504 | |
| 505 | /** |
| 506 | * tomoyo_merge_path2_acl - Merge duplicated "struct tomoyo_path2_acl" entry. |
| 507 | * |
| 508 | * @a: Pointer to "struct tomoyo_acl_info". |
| 509 | * @b: Pointer to "struct tomoyo_acl_info". |
| 510 | * @is_delete: True for @a &= ~@b, false for @a |= @b. |
| 511 | * |
| 512 | * Returns true if @a is empty, false otherwise. |
| 513 | */ |
| 514 | static bool tomoyo_merge_path2_acl(struct tomoyo_acl_info *a, |
| 515 | struct tomoyo_acl_info *b, |
| 516 | const bool is_delete) |
| 517 | { |
| 518 | u8 * const a_perm = &container_of(a, struct tomoyo_path2_acl, head) |
| 519 | ->perm; |
| 520 | u8 perm = READ_ONCE(*a_perm); |
| 521 | const u8 b_perm = container_of(b, struct tomoyo_path2_acl, head)->perm; |
| 522 | |
| 523 | if (is_delete) |
| 524 | perm &= ~b_perm; |
| 525 | else |
| 526 | perm |= b_perm; |
| 527 | WRITE_ONCE(*a_perm, perm); |
| 528 | return !perm; |
| 529 | } |
| 530 | |
| 531 | /** |
| 532 | * tomoyo_update_path2_acl - Update "struct tomoyo_path2_acl" list. |
| 533 | * |
| 534 | * @perm: Permission. |
| 535 | * @param: Pointer to "struct tomoyo_acl_param". |
| 536 | * |
| 537 | * Returns 0 on success, negative value otherwise. |
| 538 | * |
| 539 | * Caller holds tomoyo_read_lock(). |
| 540 | */ |
| 541 | static int tomoyo_update_path2_acl(const u8 perm, |
| 542 | struct tomoyo_acl_param *param) |
| 543 | { |
| 544 | struct tomoyo_path2_acl e = { |
| 545 | .head.type = TOMOYO_TYPE_PATH2_ACL, |
| 546 | .perm = perm |
| 547 | }; |
| 548 | int error; |
| 549 | |
| 550 | if (!tomoyo_parse_name_union(param, &e.name1) || |
| 551 | !tomoyo_parse_name_union(param, &e.name2)) |
| 552 | error = -EINVAL; |
| 553 | else |
| 554 | error = tomoyo_update_domain(&e.head, sizeof(e), param, |
| 555 | tomoyo_same_path2_acl, |
| 556 | tomoyo_merge_path2_acl); |
| 557 | tomoyo_put_name_union(&e.name1); |
| 558 | tomoyo_put_name_union(&e.name2); |
| 559 | return error; |
| 560 | } |
| 561 | |
| 562 | /** |
| 563 | * tomoyo_path_permission - Check permission for single path operation. |
| 564 | * |
| 565 | * @r: Pointer to "struct tomoyo_request_info". |
| 566 | * @operation: Type of operation. |
| 567 | * @filename: Filename to check. |
| 568 | * |
| 569 | * Returns 0 on success, negative value otherwise. |
| 570 | * |
| 571 | * Caller holds tomoyo_read_lock(). |
| 572 | */ |
| 573 | static int tomoyo_path_permission(struct tomoyo_request_info *r, u8 operation, |
| 574 | const struct tomoyo_path_info *filename) |
| 575 | { |
| 576 | int error; |
| 577 | |
| 578 | r->type = tomoyo_p2mac[operation]; |
| 579 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); |
| 580 | if (r->mode == TOMOYO_CONFIG_DISABLED) |
| 581 | return 0; |
| 582 | r->param_type = TOMOYO_TYPE_PATH_ACL; |
| 583 | r->param.path.filename = filename; |
| 584 | r->param.path.operation = operation; |
| 585 | do { |
| 586 | tomoyo_check_acl(r, tomoyo_check_path_acl); |
| 587 | error = tomoyo_audit_path_log(r); |
| 588 | } while (error == TOMOYO_RETRY_REQUEST); |
| 589 | return error; |
| 590 | } |
| 591 | |
| 592 | /** |
| 593 | * tomoyo_execute_permission - Check permission for execute operation. |
| 594 | * |
| 595 | * @r: Pointer to "struct tomoyo_request_info". |
| 596 | * @filename: Filename to check. |
| 597 | * |
| 598 | * Returns 0 on success, negative value otherwise. |
| 599 | * |
| 600 | * Caller holds tomoyo_read_lock(). |
| 601 | */ |
| 602 | int tomoyo_execute_permission(struct tomoyo_request_info *r, |
| 603 | const struct tomoyo_path_info *filename) |
| 604 | { |
| 605 | /* |
| 606 | * Unlike other permission checks, this check is done regardless of |
| 607 | * profile mode settings in order to check for domain transition |
| 608 | * preference. |
| 609 | */ |
| 610 | r->type = TOMOYO_MAC_FILE_EXECUTE; |
| 611 | r->mode = tomoyo_get_mode(r->domain->ns, r->profile, r->type); |
| 612 | r->param_type = TOMOYO_TYPE_PATH_ACL; |
| 613 | r->param.path.filename = filename; |
| 614 | r->param.path.operation = TOMOYO_TYPE_EXECUTE; |
| 615 | tomoyo_check_acl(r, tomoyo_check_path_acl); |
| 616 | r->ee->transition = r->matched_acl && r->matched_acl->cond ? |
| 617 | r->matched_acl->cond->transit : NULL; |
| 618 | if (r->mode != TOMOYO_CONFIG_DISABLED) |
| 619 | return tomoyo_audit_path_log(r); |
| 620 | return 0; |
| 621 | } |
| 622 | |
| 623 | /** |
| 624 | * tomoyo_same_path_number_acl - Check for duplicated "struct tomoyo_path_number_acl" entry. |
| 625 | * |
| 626 | * @a: Pointer to "struct tomoyo_acl_info". |
| 627 | * @b: Pointer to "struct tomoyo_acl_info". |
| 628 | * |
| 629 | * Returns true if @a == @b except permission bits, false otherwise. |
| 630 | */ |
| 631 | static bool tomoyo_same_path_number_acl(const struct tomoyo_acl_info *a, |
| 632 | const struct tomoyo_acl_info *b) |
| 633 | { |
| 634 | const struct tomoyo_path_number_acl *p1 = container_of(a, typeof(*p1), |
| 635 | head); |
| 636 | const struct tomoyo_path_number_acl *p2 = container_of(b, typeof(*p2), |
| 637 | head); |
| 638 | |
| 639 | return tomoyo_same_name_union(&p1->name, &p2->name) && |
| 640 | tomoyo_same_number_union(&p1->number, &p2->number); |
| 641 | } |
| 642 | |
| 643 | /** |
| 644 | * tomoyo_merge_path_number_acl - Merge duplicated "struct tomoyo_path_number_acl" entry. |
| 645 | * |
| 646 | * @a: Pointer to "struct tomoyo_acl_info". |
| 647 | * @b: Pointer to "struct tomoyo_acl_info". |
| 648 | * @is_delete: True for @a &= ~@b, false for @a |= @b. |
| 649 | * |
| 650 | * Returns true if @a is empty, false otherwise. |
| 651 | */ |
| 652 | static bool tomoyo_merge_path_number_acl(struct tomoyo_acl_info *a, |
| 653 | struct tomoyo_acl_info *b, |
| 654 | const bool is_delete) |
| 655 | { |
| 656 | u8 * const a_perm = &container_of(a, struct tomoyo_path_number_acl, |
| 657 | head)->perm; |
| 658 | u8 perm = READ_ONCE(*a_perm); |
| 659 | const u8 b_perm = container_of(b, struct tomoyo_path_number_acl, head) |
| 660 | ->perm; |
| 661 | |
| 662 | if (is_delete) |
| 663 | perm &= ~b_perm; |
| 664 | else |
| 665 | perm |= b_perm; |
| 666 | WRITE_ONCE(*a_perm, perm); |
| 667 | return !perm; |
| 668 | } |
| 669 | |
| 670 | /** |
| 671 | * tomoyo_update_path_number_acl - Update ioctl/chmod/chown/chgrp ACL. |
| 672 | * |
| 673 | * @perm: Permission. |
| 674 | * @param: Pointer to "struct tomoyo_acl_param". |
| 675 | * |
| 676 | * Returns 0 on success, negative value otherwise. |
| 677 | */ |
| 678 | static int tomoyo_update_path_number_acl(const u8 perm, |
| 679 | struct tomoyo_acl_param *param) |
| 680 | { |
| 681 | struct tomoyo_path_number_acl e = { |
| 682 | .head.type = TOMOYO_TYPE_PATH_NUMBER_ACL, |
| 683 | .perm = perm |
| 684 | }; |
| 685 | int error; |
| 686 | |
| 687 | if (!tomoyo_parse_name_union(param, &e.name) || |
| 688 | !tomoyo_parse_number_union(param, &e.number)) |
| 689 | error = -EINVAL; |
| 690 | else |
| 691 | error = tomoyo_update_domain(&e.head, sizeof(e), param, |
| 692 | tomoyo_same_path_number_acl, |
| 693 | tomoyo_merge_path_number_acl); |
| 694 | tomoyo_put_name_union(&e.name); |
| 695 | tomoyo_put_number_union(&e.number); |
| 696 | return error; |
| 697 | } |
| 698 | |
| 699 | /** |
| 700 | * tomoyo_path_number_perm - Check permission for "create", "mkdir", "mkfifo", "mksock", "ioctl", "chmod", "chown", "chgrp". |
| 701 | * |
| 702 | * @type: Type of operation. |
| 703 | * @path: Pointer to "struct path". |
| 704 | * @number: Number. |
| 705 | * |
| 706 | * Returns 0 on success, negative value otherwise. |
| 707 | */ |
| 708 | int tomoyo_path_number_perm(const u8 type, const struct path *path, |
| 709 | unsigned long number) |
| 710 | { |
| 711 | struct tomoyo_request_info r; |
| 712 | struct tomoyo_obj_info obj = { |
| 713 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
| 714 | }; |
| 715 | int error = -ENOMEM; |
| 716 | struct tomoyo_path_info buf; |
| 717 | int idx; |
| 718 | |
| 719 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pn2mac[type]) |
| 720 | == TOMOYO_CONFIG_DISABLED || !path->dentry) |
| 721 | return 0; |
| 722 | idx = tomoyo_read_lock(); |
| 723 | if (!tomoyo_get_realpath(&buf, path)) |
| 724 | goto out; |
| 725 | r.obj = &obj; |
| 726 | if (type == TOMOYO_TYPE_MKDIR) |
| 727 | tomoyo_add_slash(&buf); |
| 728 | r.param_type = TOMOYO_TYPE_PATH_NUMBER_ACL; |
| 729 | r.param.path_number.operation = type; |
| 730 | r.param.path_number.filename = &buf; |
| 731 | r.param.path_number.number = number; |
| 732 | do { |
| 733 | tomoyo_check_acl(&r, tomoyo_check_path_number_acl); |
| 734 | error = tomoyo_audit_path_number_log(&r); |
| 735 | } while (error == TOMOYO_RETRY_REQUEST); |
| 736 | kfree(buf.name); |
| 737 | out: |
| 738 | tomoyo_read_unlock(idx); |
| 739 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
| 740 | error = 0; |
| 741 | return error; |
| 742 | } |
| 743 | |
| 744 | /** |
| 745 | * tomoyo_check_open_permission - Check permission for "read" and "write". |
| 746 | * |
| 747 | * @domain: Pointer to "struct tomoyo_domain_info". |
| 748 | * @path: Pointer to "struct path". |
| 749 | * @flag: Flags for open(). |
| 750 | * |
| 751 | * Returns 0 on success, negative value otherwise. |
| 752 | */ |
| 753 | int tomoyo_check_open_permission(struct tomoyo_domain_info *domain, |
| 754 | const struct path *path, const int flag) |
| 755 | { |
| 756 | const u8 acc_mode = ACC_MODE(flag); |
| 757 | int error = 0; |
| 758 | struct tomoyo_path_info buf; |
| 759 | struct tomoyo_request_info r; |
| 760 | struct tomoyo_obj_info obj = { |
| 761 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
| 762 | }; |
| 763 | int idx; |
| 764 | |
| 765 | buf.name = NULL; |
| 766 | r.mode = TOMOYO_CONFIG_DISABLED; |
| 767 | idx = tomoyo_read_lock(); |
| 768 | if (acc_mode && |
| 769 | tomoyo_init_request_info(&r, domain, TOMOYO_MAC_FILE_OPEN) |
| 770 | != TOMOYO_CONFIG_DISABLED) { |
| 771 | if (!tomoyo_get_realpath(&buf, path)) { |
| 772 | error = -ENOMEM; |
| 773 | goto out; |
| 774 | } |
| 775 | r.obj = &obj; |
| 776 | if (acc_mode & MAY_READ) |
| 777 | error = tomoyo_path_permission(&r, TOMOYO_TYPE_READ, |
| 778 | &buf); |
| 779 | if (!error && (acc_mode & MAY_WRITE)) |
| 780 | error = tomoyo_path_permission(&r, (flag & O_APPEND) ? |
| 781 | TOMOYO_TYPE_APPEND : |
| 782 | TOMOYO_TYPE_WRITE, |
| 783 | &buf); |
| 784 | } |
| 785 | out: |
| 786 | kfree(buf.name); |
| 787 | tomoyo_read_unlock(idx); |
| 788 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
| 789 | error = 0; |
| 790 | return error; |
| 791 | } |
| 792 | |
| 793 | /** |
| 794 | * tomoyo_path_perm - Check permission for "unlink", "rmdir", "truncate", "symlink", "append", "chroot" and "unmount". |
| 795 | * |
| 796 | * @operation: Type of operation. |
| 797 | * @path: Pointer to "struct path". |
| 798 | * @target: Symlink's target if @operation is TOMOYO_TYPE_SYMLINK, |
| 799 | * NULL otherwise. |
| 800 | * |
| 801 | * Returns 0 on success, negative value otherwise. |
| 802 | */ |
| 803 | int tomoyo_path_perm(const u8 operation, const struct path *path, const char *target) |
| 804 | { |
| 805 | struct tomoyo_request_info r; |
| 806 | struct tomoyo_obj_info obj = { |
| 807 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
| 808 | }; |
| 809 | int error; |
| 810 | struct tomoyo_path_info buf; |
| 811 | bool is_enforce; |
| 812 | struct tomoyo_path_info symlink_target; |
| 813 | int idx; |
| 814 | |
| 815 | if (tomoyo_init_request_info(&r, NULL, tomoyo_p2mac[operation]) |
| 816 | == TOMOYO_CONFIG_DISABLED) |
| 817 | return 0; |
| 818 | is_enforce = (r.mode == TOMOYO_CONFIG_ENFORCING); |
| 819 | error = -ENOMEM; |
| 820 | buf.name = NULL; |
| 821 | idx = tomoyo_read_lock(); |
| 822 | if (!tomoyo_get_realpath(&buf, path)) |
| 823 | goto out; |
| 824 | r.obj = &obj; |
| 825 | switch (operation) { |
| 826 | case TOMOYO_TYPE_RMDIR: |
| 827 | case TOMOYO_TYPE_CHROOT: |
| 828 | tomoyo_add_slash(&buf); |
| 829 | break; |
| 830 | case TOMOYO_TYPE_SYMLINK: |
| 831 | symlink_target.name = tomoyo_encode(target); |
| 832 | if (!symlink_target.name) |
| 833 | goto out; |
| 834 | tomoyo_fill_path_info(&symlink_target); |
| 835 | obj.symlink_target = &symlink_target; |
| 836 | break; |
| 837 | } |
| 838 | error = tomoyo_path_permission(&r, operation, &buf); |
| 839 | if (operation == TOMOYO_TYPE_SYMLINK) |
| 840 | kfree(symlink_target.name); |
| 841 | out: |
| 842 | kfree(buf.name); |
| 843 | tomoyo_read_unlock(idx); |
| 844 | if (!is_enforce) |
| 845 | error = 0; |
| 846 | return error; |
| 847 | } |
| 848 | |
| 849 | /** |
| 850 | * tomoyo_mkdev_perm - Check permission for "mkblock" and "mkchar". |
| 851 | * |
| 852 | * @operation: Type of operation. (TOMOYO_TYPE_MKCHAR or TOMOYO_TYPE_MKBLOCK) |
| 853 | * @path: Pointer to "struct path". |
| 854 | * @mode: Create mode. |
| 855 | * @dev: Device number. |
| 856 | * |
| 857 | * Returns 0 on success, negative value otherwise. |
| 858 | */ |
| 859 | int tomoyo_mkdev_perm(const u8 operation, const struct path *path, |
| 860 | const unsigned int mode, unsigned int dev) |
| 861 | { |
| 862 | struct tomoyo_request_info r; |
| 863 | struct tomoyo_obj_info obj = { |
| 864 | .path1 = { .mnt = path->mnt, .dentry = path->dentry }, |
| 865 | }; |
| 866 | int error = -ENOMEM; |
| 867 | struct tomoyo_path_info buf; |
| 868 | int idx; |
| 869 | |
| 870 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pnnn2mac[operation]) |
| 871 | == TOMOYO_CONFIG_DISABLED) |
| 872 | return 0; |
| 873 | idx = tomoyo_read_lock(); |
| 874 | error = -ENOMEM; |
| 875 | if (tomoyo_get_realpath(&buf, path)) { |
| 876 | r.obj = &obj; |
| 877 | dev = new_decode_dev(dev); |
| 878 | r.param_type = TOMOYO_TYPE_MKDEV_ACL; |
| 879 | r.param.mkdev.filename = &buf; |
| 880 | r.param.mkdev.operation = operation; |
| 881 | r.param.mkdev.mode = mode; |
| 882 | r.param.mkdev.major = MAJOR(dev); |
| 883 | r.param.mkdev.minor = MINOR(dev); |
| 884 | tomoyo_check_acl(&r, tomoyo_check_mkdev_acl); |
| 885 | error = tomoyo_audit_mkdev_log(&r); |
| 886 | kfree(buf.name); |
| 887 | } |
| 888 | tomoyo_read_unlock(idx); |
| 889 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
| 890 | error = 0; |
| 891 | return error; |
| 892 | } |
| 893 | |
| 894 | /** |
| 895 | * tomoyo_path2_perm - Check permission for "rename", "link" and "pivot_root". |
| 896 | * |
| 897 | * @operation: Type of operation. |
| 898 | * @path1: Pointer to "struct path". |
| 899 | * @path2: Pointer to "struct path". |
| 900 | * |
| 901 | * Returns 0 on success, negative value otherwise. |
| 902 | */ |
| 903 | int tomoyo_path2_perm(const u8 operation, const struct path *path1, |
| 904 | const struct path *path2) |
| 905 | { |
| 906 | int error = -ENOMEM; |
| 907 | struct tomoyo_path_info buf1; |
| 908 | struct tomoyo_path_info buf2; |
| 909 | struct tomoyo_request_info r; |
| 910 | struct tomoyo_obj_info obj = { |
| 911 | .path1 = { .mnt = path1->mnt, .dentry = path1->dentry }, |
| 912 | .path2 = { .mnt = path2->mnt, .dentry = path2->dentry } |
| 913 | }; |
| 914 | int idx; |
| 915 | |
| 916 | if (tomoyo_init_request_info(&r, NULL, tomoyo_pp2mac[operation]) |
| 917 | == TOMOYO_CONFIG_DISABLED) |
| 918 | return 0; |
| 919 | buf1.name = NULL; |
| 920 | buf2.name = NULL; |
| 921 | idx = tomoyo_read_lock(); |
| 922 | if (!tomoyo_get_realpath(&buf1, path1) || |
| 923 | !tomoyo_get_realpath(&buf2, path2)) |
| 924 | goto out; |
| 925 | switch (operation) { |
| 926 | case TOMOYO_TYPE_RENAME: |
| 927 | case TOMOYO_TYPE_LINK: |
| 928 | if (!d_is_dir(path1->dentry)) |
| 929 | break; |
| 930 | fallthrough; |
| 931 | case TOMOYO_TYPE_PIVOT_ROOT: |
| 932 | tomoyo_add_slash(&buf1); |
| 933 | tomoyo_add_slash(&buf2); |
| 934 | break; |
| 935 | } |
| 936 | r.obj = &obj; |
| 937 | r.param_type = TOMOYO_TYPE_PATH2_ACL; |
| 938 | r.param.path2.operation = operation; |
| 939 | r.param.path2.filename1 = &buf1; |
| 940 | r.param.path2.filename2 = &buf2; |
| 941 | do { |
| 942 | tomoyo_check_acl(&r, tomoyo_check_path2_acl); |
| 943 | error = tomoyo_audit_path2_log(&r); |
| 944 | } while (error == TOMOYO_RETRY_REQUEST); |
| 945 | out: |
| 946 | kfree(buf1.name); |
| 947 | kfree(buf2.name); |
| 948 | tomoyo_read_unlock(idx); |
| 949 | if (r.mode != TOMOYO_CONFIG_ENFORCING) |
| 950 | error = 0; |
| 951 | return error; |
| 952 | } |
| 953 | |
| 954 | /** |
| 955 | * tomoyo_same_mount_acl - Check for duplicated "struct tomoyo_mount_acl" entry. |
| 956 | * |
| 957 | * @a: Pointer to "struct tomoyo_acl_info". |
| 958 | * @b: Pointer to "struct tomoyo_acl_info". |
| 959 | * |
| 960 | * Returns true if @a == @b, false otherwise. |
| 961 | */ |
| 962 | static bool tomoyo_same_mount_acl(const struct tomoyo_acl_info *a, |
| 963 | const struct tomoyo_acl_info *b) |
| 964 | { |
| 965 | const struct tomoyo_mount_acl *p1 = container_of(a, typeof(*p1), head); |
| 966 | const struct tomoyo_mount_acl *p2 = container_of(b, typeof(*p2), head); |
| 967 | |
| 968 | return tomoyo_same_name_union(&p1->dev_name, &p2->dev_name) && |
| 969 | tomoyo_same_name_union(&p1->dir_name, &p2->dir_name) && |
| 970 | tomoyo_same_name_union(&p1->fs_type, &p2->fs_type) && |
| 971 | tomoyo_same_number_union(&p1->flags, &p2->flags); |
| 972 | } |
| 973 | |
| 974 | /** |
| 975 | * tomoyo_update_mount_acl - Write "struct tomoyo_mount_acl" list. |
| 976 | * |
| 977 | * @param: Pointer to "struct tomoyo_acl_param". |
| 978 | * |
| 979 | * Returns 0 on success, negative value otherwise. |
| 980 | * |
| 981 | * Caller holds tomoyo_read_lock(). |
| 982 | */ |
| 983 | static int tomoyo_update_mount_acl(struct tomoyo_acl_param *param) |
| 984 | { |
| 985 | struct tomoyo_mount_acl e = { .head.type = TOMOYO_TYPE_MOUNT_ACL }; |
| 986 | int error; |
| 987 | |
| 988 | if (!tomoyo_parse_name_union(param, &e.dev_name) || |
| 989 | !tomoyo_parse_name_union(param, &e.dir_name) || |
| 990 | !tomoyo_parse_name_union(param, &e.fs_type) || |
| 991 | !tomoyo_parse_number_union(param, &e.flags)) |
| 992 | error = -EINVAL; |
| 993 | else |
| 994 | error = tomoyo_update_domain(&e.head, sizeof(e), param, |
| 995 | tomoyo_same_mount_acl, NULL); |
| 996 | tomoyo_put_name_union(&e.dev_name); |
| 997 | tomoyo_put_name_union(&e.dir_name); |
| 998 | tomoyo_put_name_union(&e.fs_type); |
| 999 | tomoyo_put_number_union(&e.flags); |
| 1000 | return error; |
| 1001 | } |
| 1002 | |
| 1003 | /** |
| 1004 | * tomoyo_write_file - Update file related list. |
| 1005 | * |
| 1006 | * @param: Pointer to "struct tomoyo_acl_param". |
| 1007 | * |
| 1008 | * Returns 0 on success, negative value otherwise. |
| 1009 | * |
| 1010 | * Caller holds tomoyo_read_lock(). |
| 1011 | */ |
| 1012 | int tomoyo_write_file(struct tomoyo_acl_param *param) |
| 1013 | { |
| 1014 | u16 perm = 0; |
| 1015 | u8 type; |
| 1016 | const char *operation = tomoyo_read_token(param); |
| 1017 | |
| 1018 | for (type = 0; type < TOMOYO_MAX_PATH_OPERATION; type++) |
| 1019 | if (tomoyo_permstr(operation, tomoyo_path_keyword[type])) |
| 1020 | perm |= 1 << type; |
| 1021 | if (perm) |
| 1022 | return tomoyo_update_path_acl(perm, param); |
| 1023 | for (type = 0; type < TOMOYO_MAX_PATH2_OPERATION; type++) |
| 1024 | if (tomoyo_permstr(operation, |
| 1025 | tomoyo_mac_keywords[tomoyo_pp2mac[type]])) |
| 1026 | perm |= 1 << type; |
| 1027 | if (perm) |
| 1028 | return tomoyo_update_path2_acl(perm, param); |
| 1029 | for (type = 0; type < TOMOYO_MAX_PATH_NUMBER_OPERATION; type++) |
| 1030 | if (tomoyo_permstr(operation, |
| 1031 | tomoyo_mac_keywords[tomoyo_pn2mac[type]])) |
| 1032 | perm |= 1 << type; |
| 1033 | if (perm) |
| 1034 | return tomoyo_update_path_number_acl(perm, param); |
| 1035 | for (type = 0; type < TOMOYO_MAX_MKDEV_OPERATION; type++) |
| 1036 | if (tomoyo_permstr(operation, |
| 1037 | tomoyo_mac_keywords[tomoyo_pnnn2mac[type]])) |
| 1038 | perm |= 1 << type; |
| 1039 | if (perm) |
| 1040 | return tomoyo_update_mkdev_acl(perm, param); |
| 1041 | if (tomoyo_permstr(operation, |
| 1042 | tomoyo_mac_keywords[TOMOYO_MAC_FILE_MOUNT])) |
| 1043 | return tomoyo_update_mount_acl(param); |
| 1044 | return -EINVAL; |
| 1045 | } |