Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/compat/cloudabi/cloudabi_fd.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /*- 2 * Copyright (c) 2015 Nuxi, https://nuxi.nl/ 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 __FBSDID("$FreeBSD: releng/11.1/sys/compat/cloudabi/cloudabi_fd.c 315550 2017-03-19 14:36:19Z trasz $"); 28 29 #include <sys/param.h> 30 #include <sys/capsicum.h> 31 #include <sys/filedesc.h> 32 #include <sys/proc.h> 33 #include <sys/mman.h> 34 #include <sys/socketvar.h> 35 #include <sys/syscallsubr.h> 36 #include <sys/sysproto.h> 37 #include <sys/systm.h> 38 #include <sys/unistd.h> 39 #include <sys/vnode.h> 40 41 #include <contrib/cloudabi/cloudabi_types_common.h> 42 43 #include <compat/cloudabi/cloudabi_proto.h> 44 #include <compat/cloudabi/cloudabi_util.h> 45 46 /* Translation between CloudABI and Capsicum rights. */ 47 #define RIGHTS_MAPPINGS \ 48 MAPPING(CLOUDABI_RIGHT_FD_DATASYNC, CAP_FSYNC) \ 49 MAPPING(CLOUDABI_RIGHT_FD_READ, CAP_READ) \ 50 MAPPING(CLOUDABI_RIGHT_FD_SEEK, CAP_SEEK) \ 51 MAPPING(CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS, CAP_FCNTL) \ 52 MAPPING(CLOUDABI_RIGHT_FD_SYNC, CAP_FSYNC) \ 53 MAPPING(CLOUDABI_RIGHT_FD_TELL, CAP_SEEK_TELL) \ 54 MAPPING(CLOUDABI_RIGHT_FD_WRITE, CAP_WRITE) \ 55 MAPPING(CLOUDABI_RIGHT_FILE_ADVISE) \ 56 MAPPING(CLOUDABI_RIGHT_FILE_ALLOCATE, CAP_WRITE) \ 57 MAPPING(CLOUDABI_RIGHT_FILE_CREATE_DIRECTORY, CAP_MKDIRAT) \ 58 MAPPING(CLOUDABI_RIGHT_FILE_CREATE_FILE, CAP_CREATE) \ 59 MAPPING(CLOUDABI_RIGHT_FILE_CREATE_FIFO, CAP_MKFIFOAT) \ 60 MAPPING(CLOUDABI_RIGHT_FILE_LINK_SOURCE, CAP_LINKAT_SOURCE) \ 61 MAPPING(CLOUDABI_RIGHT_FILE_LINK_TARGET, CAP_LINKAT_TARGET) \ 62 MAPPING(CLOUDABI_RIGHT_FILE_OPEN, CAP_LOOKUP) \ 63 MAPPING(CLOUDABI_RIGHT_FILE_READDIR, CAP_READ) \ 64 MAPPING(CLOUDABI_RIGHT_FILE_READLINK, CAP_LOOKUP) \ 65 MAPPING(CLOUDABI_RIGHT_FILE_RENAME_SOURCE, CAP_RENAMEAT_SOURCE) \ 66 MAPPING(CLOUDABI_RIGHT_FILE_RENAME_TARGET, CAP_RENAMEAT_TARGET) \ 67 MAPPING(CLOUDABI_RIGHT_FILE_STAT_FGET, CAP_FSTAT) \ 68 MAPPING(CLOUDABI_RIGHT_FILE_STAT_FPUT_SIZE, CAP_FTRUNCATE) \ 69 MAPPING(CLOUDABI_RIGHT_FILE_STAT_FPUT_TIMES, CAP_FUTIMES) \ 70 MAPPING(CLOUDABI_RIGHT_FILE_STAT_GET, CAP_FSTATAT) \ 71 MAPPING(CLOUDABI_RIGHT_FILE_STAT_PUT_TIMES, CAP_FUTIMESAT) \ 72 MAPPING(CLOUDABI_RIGHT_FILE_SYMLINK, CAP_SYMLINKAT) \ 73 MAPPING(CLOUDABI_RIGHT_FILE_UNLINK, CAP_UNLINKAT) \ 74 MAPPING(CLOUDABI_RIGHT_MEM_MAP, CAP_MMAP) \ 75 MAPPING(CLOUDABI_RIGHT_MEM_MAP_EXEC, CAP_MMAP_X) \ 76 MAPPING(CLOUDABI_RIGHT_POLL_FD_READWRITE, CAP_EVENT) \ 77 MAPPING(CLOUDABI_RIGHT_POLL_MODIFY, CAP_KQUEUE_CHANGE) \ 78 MAPPING(CLOUDABI_RIGHT_POLL_PROC_TERMINATE, CAP_EVENT) \ 79 MAPPING(CLOUDABI_RIGHT_POLL_WAIT, CAP_KQUEUE_EVENT) \ 80 MAPPING(CLOUDABI_RIGHT_PROC_EXEC, CAP_FEXECVE) \ 81 MAPPING(CLOUDABI_RIGHT_SOCK_ACCEPT, CAP_ACCEPT) \ 82 MAPPING(CLOUDABI_RIGHT_SOCK_BIND_DIRECTORY, CAP_BINDAT) \ 83 MAPPING(CLOUDABI_RIGHT_SOCK_BIND_SOCKET, CAP_BIND) \ 84 MAPPING(CLOUDABI_RIGHT_SOCK_CONNECT_DIRECTORY, CAP_CONNECTAT) \ 85 MAPPING(CLOUDABI_RIGHT_SOCK_CONNECT_SOCKET, CAP_CONNECT) \ 86 MAPPING(CLOUDABI_RIGHT_SOCK_LISTEN, CAP_LISTEN) \ 87 MAPPING(CLOUDABI_RIGHT_SOCK_SHUTDOWN, CAP_SHUTDOWN) \ 88 MAPPING(CLOUDABI_RIGHT_SOCK_STAT_GET, CAP_GETPEERNAME, \ 89 CAP_GETSOCKNAME, CAP_GETSOCKOPT) 90 91 int 92 cloudabi_sys_fd_close(struct thread *td, struct cloudabi_sys_fd_close_args *uap) 93 { 94 95 return (kern_close(td, uap->fd)); 96 } 97 98 int 99 cloudabi_sys_fd_create1(struct thread *td, 100 struct cloudabi_sys_fd_create1_args *uap) 101 { 102 struct filecaps fcaps = {}; 103 104 switch (uap->type) { 105 case CLOUDABI_FILETYPE_POLL: 106 cap_rights_init(&fcaps.fc_rights, CAP_FSTAT, CAP_KQUEUE); 107 return (kern_kqueue(td, 0, &fcaps)); 108 case CLOUDABI_FILETYPE_SHARED_MEMORY: 109 cap_rights_init(&fcaps.fc_rights, CAP_FSTAT, CAP_FTRUNCATE, 110 CAP_MMAP_RWX); 111 return (kern_shm_open(td, SHM_ANON, O_RDWR, 0, &fcaps)); 112 case CLOUDABI_FILETYPE_SOCKET_DGRAM: 113 return (kern_socket(td, AF_UNIX, SOCK_DGRAM, 0)); 114 case CLOUDABI_FILETYPE_SOCKET_SEQPACKET: 115 return (kern_socket(td, AF_UNIX, SOCK_SEQPACKET, 0)); 116 case CLOUDABI_FILETYPE_SOCKET_STREAM: 117 return (kern_socket(td, AF_UNIX, SOCK_STREAM, 0)); 118 default: 119 return (EINVAL); 120 } 121 } 122 123 int 124 cloudabi_sys_fd_create2(struct thread *td, 125 struct cloudabi_sys_fd_create2_args *uap) 126 { 127 struct filecaps fcaps1 = {}, fcaps2 = {}; 128 int fds[2]; 129 int error; 130 131 switch (uap->type) { 132 case CLOUDABI_FILETYPE_FIFO: 133 /* 134 * CloudABI pipes are unidirectional. Restrict rights on 135 * the pipe to simulate this. 136 */ 137 cap_rights_init(&fcaps1.fc_rights, CAP_EVENT, CAP_FCNTL, 138 CAP_FSTAT, CAP_READ); 139 fcaps1.fc_fcntls = CAP_FCNTL_SETFL; 140 cap_rights_init(&fcaps2.fc_rights, CAP_EVENT, CAP_FCNTL, 141 CAP_FSTAT, CAP_WRITE); 142 fcaps2.fc_fcntls = CAP_FCNTL_SETFL; 143 error = kern_pipe(td, fds, 0, &fcaps1, &fcaps2); 144 break; 145 case CLOUDABI_FILETYPE_SOCKET_DGRAM: 146 error = kern_socketpair(td, AF_UNIX, SOCK_DGRAM, 0, fds); 147 break; 148 case CLOUDABI_FILETYPE_SOCKET_SEQPACKET: 149 error = kern_socketpair(td, AF_UNIX, SOCK_SEQPACKET, 0, fds); 150 break; 151 case CLOUDABI_FILETYPE_SOCKET_STREAM: 152 error = kern_socketpair(td, AF_UNIX, SOCK_STREAM, 0, fds); 153 break; 154 default: 155 return (EINVAL); 156 } 157 158 if (error == 0) { 159 td->td_retval[0] = fds[0]; 160 td->td_retval[1] = fds[1]; 161 } 162 return (0); 163 } 164 165 int 166 cloudabi_sys_fd_datasync(struct thread *td, 167 struct cloudabi_sys_fd_datasync_args *uap) 168 { 169 170 return (kern_fsync(td, uap->fd, false)); 171 } 172 173 int 174 cloudabi_sys_fd_dup(struct thread *td, struct cloudabi_sys_fd_dup_args *uap) 175 { 176 177 return (kern_dup(td, FDDUP_NORMAL, 0, uap->from, 0)); 178 } 179 180 int 181 cloudabi_sys_fd_replace(struct thread *td, 182 struct cloudabi_sys_fd_replace_args *uap) 183 { 184 int error; 185 186 /* 187 * CloudABI's equivalent to dup2(). CloudABI processes should 188 * not depend on hardcoded file descriptor layouts, but simply 189 * use the file descriptor numbers that are allocated by the 190 * kernel. Duplicating file descriptors to arbitrary numbers 191 * should not be done. 192 * 193 * Invoke kern_dup() with FDDUP_MUSTREPLACE, so that we return 194 * EBADF when duplicating to a nonexistent file descriptor. Also 195 * clear the return value, as this system call yields no return 196 * value. 197 */ 198 error = kern_dup(td, FDDUP_MUSTREPLACE, 0, uap->from, uap->to); 199 td->td_retval[0] = 0; 200 return (error); 201 } 202 203 int 204 cloudabi_sys_fd_seek(struct thread *td, struct cloudabi_sys_fd_seek_args *uap) 205 { 206 int whence; 207 208 switch (uap->whence) { 209 case CLOUDABI_WHENCE_CUR: 210 whence = SEEK_CUR; 211 break; 212 case CLOUDABI_WHENCE_END: 213 whence = SEEK_END; 214 break; 215 case CLOUDABI_WHENCE_SET: 216 whence = SEEK_SET; 217 break; 218 default: 219 return (EINVAL); 220 } 221 222 return (kern_lseek(td, uap->fd, uap->offset, whence)); 223 } 224 225 /* Converts a file descriptor to a CloudABI file descriptor type. */ 226 cloudabi_filetype_t 227 cloudabi_convert_filetype(const struct file *fp) 228 { 229 struct socket *so; 230 struct vnode *vp; 231 232 switch (fp->f_type) { 233 case DTYPE_FIFO: 234 return (CLOUDABI_FILETYPE_FIFO); 235 case DTYPE_KQUEUE: 236 return (CLOUDABI_FILETYPE_POLL); 237 case DTYPE_PIPE: 238 return (CLOUDABI_FILETYPE_FIFO); 239 case DTYPE_PROCDESC: 240 return (CLOUDABI_FILETYPE_PROCESS); 241 case DTYPE_SHM: 242 return (CLOUDABI_FILETYPE_SHARED_MEMORY); 243 case DTYPE_SOCKET: 244 so = fp->f_data; 245 switch (so->so_type) { 246 case SOCK_DGRAM: 247 return (CLOUDABI_FILETYPE_SOCKET_DGRAM); 248 case SOCK_SEQPACKET: 249 return (CLOUDABI_FILETYPE_SOCKET_SEQPACKET); 250 case SOCK_STREAM: 251 return (CLOUDABI_FILETYPE_SOCKET_STREAM); 252 default: 253 return (CLOUDABI_FILETYPE_UNKNOWN); 254 } 255 case DTYPE_VNODE: 256 vp = fp->f_vnode; 257 switch (vp->v_type) { 258 case VBLK: 259 return (CLOUDABI_FILETYPE_BLOCK_DEVICE); 260 case VCHR: 261 return (CLOUDABI_FILETYPE_CHARACTER_DEVICE); 262 case VDIR: 263 return (CLOUDABI_FILETYPE_DIRECTORY); 264 case VFIFO: 265 return (CLOUDABI_FILETYPE_FIFO); 266 case VLNK: 267 return (CLOUDABI_FILETYPE_SYMBOLIC_LINK); 268 case VREG: 269 return (CLOUDABI_FILETYPE_REGULAR_FILE); 270 case VSOCK: 271 return (CLOUDABI_FILETYPE_SOCKET_STREAM); 272 default: 273 return (CLOUDABI_FILETYPE_UNKNOWN); 274 } 275 default: 276 return (CLOUDABI_FILETYPE_UNKNOWN); 277 } 278 } 279 280 /* Removes rights that conflict with the file descriptor type. */ 281 void 282 cloudabi_remove_conflicting_rights(cloudabi_filetype_t filetype, 283 cloudabi_rights_t *base, cloudabi_rights_t *inheriting) 284 { 285 286 /* 287 * CloudABI has a small number of additional rights bits to 288 * disambiguate between multiple purposes. Remove the bits that 289 * don't apply to the type of the file descriptor. 290 * 291 * As file descriptor access modes (O_ACCMODE) has been fully 292 * replaced by rights bits, CloudABI distinguishes between 293 * rights that apply to the file descriptor itself (base) versus 294 * rights of new file descriptors derived from them 295 * (inheriting). The code below approximates the pair by 296 * decomposing depending on the file descriptor type. 297 * 298 * We need to be somewhat accurate about which actions can 299 * actually be performed on the file descriptor, as functions 300 * like fcntl(fd, F_GETFL) are emulated on top of this. 301 */ 302 switch (filetype) { 303 case CLOUDABI_FILETYPE_DIRECTORY: 304 *base &= CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS | 305 CLOUDABI_RIGHT_FD_SYNC | CLOUDABI_RIGHT_FILE_ADVISE | 306 CLOUDABI_RIGHT_FILE_CREATE_DIRECTORY | 307 CLOUDABI_RIGHT_FILE_CREATE_FILE | 308 CLOUDABI_RIGHT_FILE_CREATE_FIFO | 309 CLOUDABI_RIGHT_FILE_LINK_SOURCE | 310 CLOUDABI_RIGHT_FILE_LINK_TARGET | 311 CLOUDABI_RIGHT_FILE_OPEN | 312 CLOUDABI_RIGHT_FILE_READDIR | 313 CLOUDABI_RIGHT_FILE_READLINK | 314 CLOUDABI_RIGHT_FILE_RENAME_SOURCE | 315 CLOUDABI_RIGHT_FILE_RENAME_TARGET | 316 CLOUDABI_RIGHT_FILE_STAT_FGET | 317 CLOUDABI_RIGHT_FILE_STAT_FPUT_TIMES | 318 CLOUDABI_RIGHT_FILE_STAT_GET | 319 CLOUDABI_RIGHT_FILE_STAT_PUT_TIMES | 320 CLOUDABI_RIGHT_FILE_SYMLINK | 321 CLOUDABI_RIGHT_FILE_UNLINK | 322 CLOUDABI_RIGHT_POLL_FD_READWRITE | 323 CLOUDABI_RIGHT_SOCK_BIND_DIRECTORY | 324 CLOUDABI_RIGHT_SOCK_CONNECT_DIRECTORY; 325 *inheriting &= CLOUDABI_RIGHT_FD_DATASYNC | 326 CLOUDABI_RIGHT_FD_READ | 327 CLOUDABI_RIGHT_FD_SEEK | 328 CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS | 329 CLOUDABI_RIGHT_FD_SYNC | 330 CLOUDABI_RIGHT_FD_TELL | 331 CLOUDABI_RIGHT_FD_WRITE | 332 CLOUDABI_RIGHT_FILE_ADVISE | 333 CLOUDABI_RIGHT_FILE_ALLOCATE | 334 CLOUDABI_RIGHT_FILE_CREATE_DIRECTORY | 335 CLOUDABI_RIGHT_FILE_CREATE_FILE | 336 CLOUDABI_RIGHT_FILE_CREATE_FIFO | 337 CLOUDABI_RIGHT_FILE_LINK_SOURCE | 338 CLOUDABI_RIGHT_FILE_LINK_TARGET | 339 CLOUDABI_RIGHT_FILE_OPEN | 340 CLOUDABI_RIGHT_FILE_READDIR | 341 CLOUDABI_RIGHT_FILE_READLINK | 342 CLOUDABI_RIGHT_FILE_RENAME_SOURCE | 343 CLOUDABI_RIGHT_FILE_RENAME_TARGET | 344 CLOUDABI_RIGHT_FILE_STAT_FGET | 345 CLOUDABI_RIGHT_FILE_STAT_FPUT_SIZE | 346 CLOUDABI_RIGHT_FILE_STAT_FPUT_TIMES | 347 CLOUDABI_RIGHT_FILE_STAT_GET | 348 CLOUDABI_RIGHT_FILE_STAT_PUT_TIMES | 349 CLOUDABI_RIGHT_FILE_SYMLINK | 350 CLOUDABI_RIGHT_FILE_UNLINK | 351 CLOUDABI_RIGHT_MEM_MAP | 352 CLOUDABI_RIGHT_MEM_MAP_EXEC | 353 CLOUDABI_RIGHT_POLL_FD_READWRITE | 354 CLOUDABI_RIGHT_PROC_EXEC | 355 CLOUDABI_RIGHT_SOCK_BIND_DIRECTORY | 356 CLOUDABI_RIGHT_SOCK_CONNECT_DIRECTORY; 357 break; 358 case CLOUDABI_FILETYPE_FIFO: 359 *base &= CLOUDABI_RIGHT_FD_READ | 360 CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS | 361 CLOUDABI_RIGHT_FD_WRITE | 362 CLOUDABI_RIGHT_FILE_STAT_FGET | 363 CLOUDABI_RIGHT_POLL_FD_READWRITE; 364 *inheriting = 0; 365 break; 366 case CLOUDABI_FILETYPE_POLL: 367 *base &= ~CLOUDABI_RIGHT_FILE_ADVISE; 368 *inheriting = 0; 369 break; 370 case CLOUDABI_FILETYPE_PROCESS: 371 *base &= ~(CLOUDABI_RIGHT_FILE_ADVISE | 372 CLOUDABI_RIGHT_POLL_FD_READWRITE); 373 *inheriting = 0; 374 break; 375 case CLOUDABI_FILETYPE_REGULAR_FILE: 376 *base &= CLOUDABI_RIGHT_FD_DATASYNC | 377 CLOUDABI_RIGHT_FD_READ | 378 CLOUDABI_RIGHT_FD_SEEK | 379 CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS | 380 CLOUDABI_RIGHT_FD_SYNC | 381 CLOUDABI_RIGHT_FD_TELL | 382 CLOUDABI_RIGHT_FD_WRITE | 383 CLOUDABI_RIGHT_FILE_ADVISE | 384 CLOUDABI_RIGHT_FILE_ALLOCATE | 385 CLOUDABI_RIGHT_FILE_STAT_FGET | 386 CLOUDABI_RIGHT_FILE_STAT_FPUT_SIZE | 387 CLOUDABI_RIGHT_FILE_STAT_FPUT_TIMES | 388 CLOUDABI_RIGHT_MEM_MAP | 389 CLOUDABI_RIGHT_MEM_MAP_EXEC | 390 CLOUDABI_RIGHT_POLL_FD_READWRITE | 391 CLOUDABI_RIGHT_PROC_EXEC; 392 *inheriting = 0; 393 break; 394 case CLOUDABI_FILETYPE_SHARED_MEMORY: 395 *base &= ~(CLOUDABI_RIGHT_FD_SEEK | 396 CLOUDABI_RIGHT_FD_TELL | 397 CLOUDABI_RIGHT_FILE_ADVISE | 398 CLOUDABI_RIGHT_FILE_ALLOCATE | 399 CLOUDABI_RIGHT_FILE_READDIR); 400 *inheriting = 0; 401 break; 402 case CLOUDABI_FILETYPE_SOCKET_DGRAM: 403 case CLOUDABI_FILETYPE_SOCKET_SEQPACKET: 404 case CLOUDABI_FILETYPE_SOCKET_STREAM: 405 *base &= CLOUDABI_RIGHT_FD_READ | 406 CLOUDABI_RIGHT_FD_STAT_PUT_FLAGS | 407 CLOUDABI_RIGHT_FD_WRITE | 408 CLOUDABI_RIGHT_FILE_STAT_FGET | 409 CLOUDABI_RIGHT_POLL_FD_READWRITE | 410 CLOUDABI_RIGHT_SOCK_ACCEPT | 411 CLOUDABI_RIGHT_SOCK_BIND_SOCKET | 412 CLOUDABI_RIGHT_SOCK_CONNECT_SOCKET | 413 CLOUDABI_RIGHT_SOCK_LISTEN | 414 CLOUDABI_RIGHT_SOCK_SHUTDOWN | 415 CLOUDABI_RIGHT_SOCK_STAT_GET; 416 break; 417 default: 418 *inheriting = 0; 419 break; 420 } 421 } 422 423 /* Converts FreeBSD's Capsicum rights to CloudABI's set of rights. */ 424 static void 425 convert_capabilities(const cap_rights_t *capabilities, 426 cloudabi_filetype_t filetype, cloudabi_rights_t *base, 427 cloudabi_rights_t *inheriting) 428 { 429 cloudabi_rights_t rights; 430 431 /* Convert FreeBSD bits to CloudABI bits. */ 432 rights = 0; 433 #define MAPPING(cloudabi, ...) do { \ 434 if (cap_rights_is_set(capabilities, ##__VA_ARGS__)) \ 435 rights |= (cloudabi); \ 436 } while (0); 437 RIGHTS_MAPPINGS 438 #undef MAPPING 439 440 *base = rights; 441 *inheriting = rights; 442 cloudabi_remove_conflicting_rights(filetype, base, inheriting); 443 } 444 445 int 446 cloudabi_sys_fd_stat_get(struct thread *td, 447 struct cloudabi_sys_fd_stat_get_args *uap) 448 { 449 cloudabi_fdstat_t fsb = {}; 450 struct filedesc *fdp; 451 struct file *fp; 452 seq_t seq; 453 cap_rights_t rights; 454 int error, oflags; 455 bool modified; 456 457 /* Obtain file descriptor properties. */ 458 fdp = td->td_proc->p_fd; 459 do { 460 error = fget_unlocked(fdp, uap->fd, cap_rights_init(&rights), 461 &fp, &seq); 462 if (error != 0) 463 return (error); 464 if (fp->f_ops == &badfileops) { 465 fdrop(fp, td); 466 return (EBADF); 467 } 468 469 rights = *cap_rights(fdp, uap->fd); 470 oflags = OFLAGS(fp->f_flag); 471 fsb.fs_filetype = cloudabi_convert_filetype(fp); 472 473 modified = fd_modified(fdp, uap->fd, seq); 474 fdrop(fp, td); 475 } while (modified); 476 477 /* Convert file descriptor flags. */ 478 if (oflags & O_APPEND) 479 fsb.fs_flags |= CLOUDABI_FDFLAG_APPEND; 480 if (oflags & O_NONBLOCK) 481 fsb.fs_flags |= CLOUDABI_FDFLAG_NONBLOCK; 482 if (oflags & O_SYNC) 483 fsb.fs_flags |= CLOUDABI_FDFLAG_SYNC; 484 485 /* Convert capabilities to CloudABI rights. */ 486 convert_capabilities(&rights, fsb.fs_filetype, 487 &fsb.fs_rights_base, &fsb.fs_rights_inheriting); 488 return (copyout(&fsb, (void *)uap->buf, sizeof(fsb))); 489 } 490 491 /* Converts CloudABI rights to a set of Capsicum capabilities. */ 492 int 493 cloudabi_convert_rights(cloudabi_rights_t in, cap_rights_t *out) 494 { 495 496 cap_rights_init(out); 497 #define MAPPING(cloudabi, ...) do { \ 498 if (in & (cloudabi)) { \ 499 cap_rights_set(out, ##__VA_ARGS__); \ 500 in &= ~(cloudabi); \ 501 } \ 502 } while (0); 503 RIGHTS_MAPPINGS 504 #undef MAPPING 505 if (in != 0) 506 return (ENOTCAPABLE); 507 return (0); 508 } 509 510 int 511 cloudabi_sys_fd_stat_put(struct thread *td, 512 struct cloudabi_sys_fd_stat_put_args *uap) 513 { 514 cloudabi_fdstat_t fsb; 515 cap_rights_t rights; 516 int error, oflags; 517 518 error = copyin(uap->buf, &fsb, sizeof(fsb)); 519 if (error != 0) 520 return (error); 521 522 if (uap->flags == CLOUDABI_FDSTAT_FLAGS) { 523 /* Convert flags. */ 524 oflags = 0; 525 if (fsb.fs_flags & CLOUDABI_FDFLAG_APPEND) 526 oflags |= O_APPEND; 527 if (fsb.fs_flags & CLOUDABI_FDFLAG_NONBLOCK) 528 oflags |= O_NONBLOCK; 529 if (fsb.fs_flags & (CLOUDABI_FDFLAG_SYNC | 530 CLOUDABI_FDFLAG_DSYNC | CLOUDABI_FDFLAG_RSYNC)) 531 oflags |= O_SYNC; 532 return (kern_fcntl(td, uap->fd, F_SETFL, oflags)); 533 } else if (uap->flags == CLOUDABI_FDSTAT_RIGHTS) { 534 /* Convert rights. */ 535 error = cloudabi_convert_rights( 536 fsb.fs_rights_base | fsb.fs_rights_inheriting, &rights); 537 if (error != 0) 538 return (error); 539 return (kern_cap_rights_limit(td, uap->fd, &rights)); 540 } 541 return (EINVAL); 542 } 543 544 int 545 cloudabi_sys_fd_sync(struct thread *td, struct cloudabi_sys_fd_sync_args *uap) 546 { 547 548 return (kern_fsync(td, uap->fd, true)); 549 }
Cache object: cff1e74489abe3872f672de2ed330178
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]