1 /* $NetBSD: linux_file.c,v 1.101 2010/11/19 06:44:37 dholland Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Functions in multiarch: 34 * linux_sys_llseek : linux_llseek.c 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: linux_file.c,v 1.101 2010/11/19 06:44:37 dholland Exp $"); 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/namei.h> 43 #include <sys/proc.h> 44 #include <sys/file.h> 45 #include <sys/stat.h> 46 #include <sys/filedesc.h> 47 #include <sys/ioctl.h> 48 #include <sys/kernel.h> 49 #include <sys/mount.h> 50 #include <sys/malloc.h> 51 #include <sys/namei.h> 52 #include <sys/vnode.h> 53 #include <sys/tty.h> 54 #include <sys/socketvar.h> 55 #include <sys/conf.h> 56 #include <sys/pipe.h> 57 58 #include <sys/syscallargs.h> 59 #include <sys/vfs_syscalls.h> 60 61 #include <compat/linux/common/linux_types.h> 62 #include <compat/linux/common/linux_signal.h> 63 #include <compat/linux/common/linux_fcntl.h> 64 #include <compat/linux/common/linux_util.h> 65 #include <compat/linux/common/linux_machdep.h> 66 #include <compat/linux/common/linux_ipc.h> 67 #include <compat/linux/common/linux_sem.h> 68 69 #include <compat/linux/linux_syscallargs.h> 70 71 static int linux_to_bsd_ioflags(int); 72 static int bsd_to_linux_ioflags(int); 73 #ifndef __amd64__ 74 static void bsd_to_linux_stat(struct stat *, struct linux_stat *); 75 #endif 76 77 conv_linux_flock(linux, flock) 78 79 /* 80 * Some file-related calls are handled here. The usual flag conversion 81 * an structure conversion is done, and alternate emul path searching. 82 */ 83 84 /* 85 * The next two functions convert between the Linux and NetBSD values 86 * of the flags used in open(2) and fcntl(2). 87 */ 88 static int 89 linux_to_bsd_ioflags(int lflags) 90 { 91 int res = 0; 92 93 res |= cvtto_bsd_mask(lflags, LINUX_O_WRONLY, O_WRONLY); 94 res |= cvtto_bsd_mask(lflags, LINUX_O_RDONLY, O_RDONLY); 95 res |= cvtto_bsd_mask(lflags, LINUX_O_RDWR, O_RDWR); 96 res |= cvtto_bsd_mask(lflags, LINUX_O_CREAT, O_CREAT); 97 res |= cvtto_bsd_mask(lflags, LINUX_O_EXCL, O_EXCL); 98 res |= cvtto_bsd_mask(lflags, LINUX_O_NOCTTY, O_NOCTTY); 99 res |= cvtto_bsd_mask(lflags, LINUX_O_TRUNC, O_TRUNC); 100 res |= cvtto_bsd_mask(lflags, LINUX_O_NDELAY, O_NDELAY); 101 res |= cvtto_bsd_mask(lflags, LINUX_O_SYNC, O_FSYNC); 102 res |= cvtto_bsd_mask(lflags, LINUX_FASYNC, O_ASYNC); 103 res |= cvtto_bsd_mask(lflags, LINUX_O_APPEND, O_APPEND); 104 res |= cvtto_bsd_mask(lflags, LINUX_O_DIRECTORY, O_DIRECTORY); 105 106 return res; 107 } 108 109 static int 110 bsd_to_linux_ioflags(int bflags) 111 { 112 int res = 0; 113 114 res |= cvtto_linux_mask(bflags, O_WRONLY, LINUX_O_WRONLY); 115 res |= cvtto_linux_mask(bflags, O_RDONLY, LINUX_O_RDONLY); 116 res |= cvtto_linux_mask(bflags, O_RDWR, LINUX_O_RDWR); 117 res |= cvtto_linux_mask(bflags, O_CREAT, LINUX_O_CREAT); 118 res |= cvtto_linux_mask(bflags, O_EXCL, LINUX_O_EXCL); 119 res |= cvtto_linux_mask(bflags, O_NOCTTY, LINUX_O_NOCTTY); 120 res |= cvtto_linux_mask(bflags, O_TRUNC, LINUX_O_TRUNC); 121 res |= cvtto_linux_mask(bflags, O_NDELAY, LINUX_O_NDELAY); 122 res |= cvtto_linux_mask(bflags, O_FSYNC, LINUX_O_SYNC); 123 res |= cvtto_linux_mask(bflags, O_ASYNC, LINUX_FASYNC); 124 res |= cvtto_linux_mask(bflags, O_APPEND, LINUX_O_APPEND); 125 res |= cvtto_linux_mask(bflags, O_DIRECTORY, LINUX_O_DIRECTORY); 126 127 return res; 128 } 129 130 /* 131 * creat(2) is an obsolete function, but it's present as a Linux 132 * system call, so let's deal with it. 133 * 134 * Note: On the Alpha this doesn't really exist in Linux, but it's defined 135 * in syscalls.master anyway so this doesn't have to be special cased. 136 * 137 * Just call open(2) with the TRUNC, CREAT and WRONLY flags. 138 */ 139 int 140 linux_sys_creat(struct lwp *l, const struct linux_sys_creat_args *uap, register_t *retval) 141 { 142 /* { 143 syscallarg(const char *) path; 144 syscallarg(int) mode; 145 } */ 146 struct sys_open_args oa; 147 148 SCARG(&oa, path) = SCARG(uap, path); 149 SCARG(&oa, flags) = O_CREAT | O_TRUNC | O_WRONLY; 150 SCARG(&oa, mode) = SCARG(uap, mode); 151 152 return sys_open(l, &oa, retval); 153 } 154 155 /* 156 * open(2). Take care of the different flag values, and let the 157 * NetBSD syscall do the real work. See if this operation 158 * gives the current process a controlling terminal. 159 * (XXX is this necessary?) 160 */ 161 int 162 linux_sys_open(struct lwp *l, const struct linux_sys_open_args *uap, register_t *retval) 163 { 164 /* { 165 syscallarg(const char *) path; 166 syscallarg(int) flags; 167 syscallarg(int) mode; 168 } */ 169 struct proc *p = l->l_proc; 170 int error, fl; 171 struct sys_open_args boa; 172 173 fl = linux_to_bsd_ioflags(SCARG(uap, flags)); 174 175 SCARG(&boa, path) = SCARG(uap, path); 176 SCARG(&boa, flags) = fl; 177 SCARG(&boa, mode) = SCARG(uap, mode); 178 179 if ((error = sys_open(l, &boa, retval))) 180 return error; 181 182 /* 183 * this bit from sunos_misc.c (and svr4_fcntl.c). 184 * If we are a session leader, and we don't have a controlling 185 * terminal yet, and the O_NOCTTY flag is not set, try to make 186 * this the controlling terminal. 187 */ 188 if (!(fl & O_NOCTTY) && SESS_LEADER(p) && !(p->p_lflag & PL_CONTROLT)) { 189 file_t *fp; 190 191 fp = fd_getfile(*retval); 192 193 /* ignore any error, just give it a try */ 194 if (fp != NULL) { 195 if (fp->f_type == DTYPE_VNODE) { 196 (fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, NULL); 197 } 198 fd_putfile(*retval); 199 } 200 } 201 return 0; 202 } 203 204 /* 205 * Most actions in the fcntl() call are straightforward; simply 206 * pass control to the NetBSD system call. A few commands need 207 * conversions after the actual system call has done its work, 208 * because the flag values and lock structure are different. 209 */ 210 int 211 linux_sys_fcntl(struct lwp *l, const struct linux_sys_fcntl_args *uap, register_t *retval) 212 { 213 /* { 214 syscallarg(int) fd; 215 syscallarg(int) cmd; 216 syscallarg(void *) arg; 217 } */ 218 struct proc *p = l->l_proc; 219 int fd, cmd, error; 220 u_long val; 221 void *arg; 222 struct sys_fcntl_args fca; 223 file_t *fp; 224 struct vnode *vp; 225 struct vattr va; 226 long pgid; 227 struct pgrp *pgrp; 228 struct tty *tp; 229 230 fd = SCARG(uap, fd); 231 cmd = SCARG(uap, cmd); 232 arg = SCARG(uap, arg); 233 234 switch (cmd) { 235 236 case LINUX_F_DUPFD: 237 cmd = F_DUPFD; 238 break; 239 240 case LINUX_F_GETFD: 241 cmd = F_GETFD; 242 break; 243 244 case LINUX_F_SETFD: 245 cmd = F_SETFD; 246 break; 247 248 case LINUX_F_GETFL: 249 SCARG(&fca, fd) = fd; 250 SCARG(&fca, cmd) = F_GETFL; 251 SCARG(&fca, arg) = arg; 252 if ((error = sys_fcntl(l, &fca, retval))) 253 return error; 254 retval[0] = bsd_to_linux_ioflags(retval[0]); 255 return 0; 256 257 case LINUX_F_SETFL: { 258 file_t *fp1 = NULL; 259 260 val = linux_to_bsd_ioflags((unsigned long)SCARG(uap, arg)); 261 /* 262 * Linux seems to have same semantics for sending SIGIO to the 263 * read side of socket, but slightly different semantics 264 * for SIGIO to the write side. Rather than sending the SIGIO 265 * every time it's possible to write (directly) more data, it 266 * only sends SIGIO if last write(2) failed due to insufficient 267 * memory to hold the data. This is compatible enough 268 * with NetBSD semantics to not do anything about the 269 * difference. 270 * 271 * Linux does NOT send SIGIO for pipes. Deal with socketpair 272 * ones and DTYPE_PIPE ones. For these, we don't set 273 * the underlying flags (we don't pass O_ASYNC flag down 274 * to sys_fcntl()), but set the FASYNC flag for file descriptor, 275 * so that F_GETFL would report the ASYNC i/o is on. 276 */ 277 if (val & O_ASYNC) { 278 if (((fp1 = fd_getfile(fd)) == NULL)) 279 return (EBADF); 280 if (((fp1->f_type == DTYPE_SOCKET) && fp1->f_data 281 && ((struct socket *)fp1->f_data)->so_state & SS_ISAPIPE) 282 || (fp1->f_type == DTYPE_PIPE)) 283 val &= ~O_ASYNC; 284 else { 285 /* not a pipe, do not modify anything */ 286 fd_putfile(fd); 287 fp1 = NULL; 288 } 289 } 290 291 SCARG(&fca, fd) = fd; 292 SCARG(&fca, cmd) = F_SETFL; 293 SCARG(&fca, arg) = (void *) val; 294 295 error = sys_fcntl(l, &fca, retval); 296 297 /* Now set the FASYNC flag for pipes */ 298 if (fp1) { 299 if (!error) { 300 mutex_enter(&fp1->f_lock); 301 fp1->f_flag |= FASYNC; 302 mutex_exit(&fp1->f_lock); 303 } 304 fd_putfile(fd); 305 } 306 307 return (error); 308 } 309 310 case LINUX_F_GETLK: 311 do_linux_getlk(fd, cmd, arg, linux, flock); 312 313 case LINUX_F_SETLK: 314 case LINUX_F_SETLKW: 315 do_linux_setlk(fd, cmd, arg, linux, flock, LINUX_F_SETLK); 316 317 case LINUX_F_SETOWN: 318 case LINUX_F_GETOWN: 319 /* 320 * We need to route fcntl() for tty descriptors around normal 321 * fcntl(), since NetBSD tty TIOC{G,S}PGRP semantics is too 322 * restrictive for Linux F_{G,S}ETOWN. For non-tty descriptors, 323 * this is not a problem. 324 */ 325 if ((fp = fd_getfile(fd)) == NULL) 326 return EBADF; 327 328 /* Check it's a character device vnode */ 329 if (fp->f_type != DTYPE_VNODE 330 || (vp = (struct vnode *)fp->f_data) == NULL 331 || vp->v_type != VCHR) { 332 fd_putfile(fd); 333 334 not_tty: 335 /* Not a tty, proceed with common fcntl() */ 336 cmd = cmd == LINUX_F_SETOWN ? F_SETOWN : F_GETOWN; 337 break; 338 } 339 340 error = VOP_GETATTR(vp, &va, l->l_cred); 341 342 fd_putfile(fd); 343 344 if (error) 345 return error; 346 347 if ((tp = cdev_tty(va.va_rdev)) == NULL) 348 goto not_tty; 349 350 /* set tty pg_id appropriately */ 351 mutex_enter(proc_lock); 352 if (cmd == LINUX_F_GETOWN) { 353 retval[0] = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PGID; 354 mutex_exit(proc_lock); 355 return 0; 356 } 357 if ((long)arg <= 0) { 358 pgid = -(long)arg; 359 } else { 360 struct proc *p1 = proc_find((long)arg); 361 if (p1 == NULL) { 362 mutex_exit(proc_lock); 363 return (ESRCH); 364 } 365 pgid = (long)p1->p_pgrp->pg_id; 366 } 367 pgrp = pgrp_find(pgid); 368 if (pgrp == NULL || pgrp->pg_session != p->p_session) { 369 mutex_exit(proc_lock); 370 return EPERM; 371 } 372 tp->t_pgrp = pgrp; 373 mutex_exit(proc_lock); 374 return 0; 375 376 default: 377 return EOPNOTSUPP; 378 } 379 380 SCARG(&fca, fd) = fd; 381 SCARG(&fca, cmd) = cmd; 382 SCARG(&fca, arg) = arg; 383 384 return sys_fcntl(l, &fca, retval); 385 } 386 387 #if !defined(__amd64__) 388 /* 389 * Convert a NetBSD stat structure to a Linux stat structure. 390 * Only the order of the fields and the padding in the structure 391 * is different. linux_fakedev is a machine-dependent function 392 * which optionally converts device driver major/minor numbers 393 * (XXX horrible, but what can you do against code that compares 394 * things against constant major device numbers? sigh) 395 */ 396 static void 397 bsd_to_linux_stat(struct stat *bsp, struct linux_stat *lsp) 398 { 399 400 lsp->lst_dev = linux_fakedev(bsp->st_dev, 0); 401 lsp->lst_ino = bsp->st_ino; 402 lsp->lst_mode = (linux_mode_t)bsp->st_mode; 403 if (bsp->st_nlink >= (1 << 15)) 404 lsp->lst_nlink = (1 << 15) - 1; 405 else 406 lsp->lst_nlink = (linux_nlink_t)bsp->st_nlink; 407 lsp->lst_uid = bsp->st_uid; 408 lsp->lst_gid = bsp->st_gid; 409 lsp->lst_rdev = linux_fakedev(bsp->st_rdev, 1); 410 lsp->lst_size = bsp->st_size; 411 lsp->lst_blksize = bsp->st_blksize; 412 lsp->lst_blocks = bsp->st_blocks; 413 lsp->lst_atime = bsp->st_atime; 414 lsp->lst_mtime = bsp->st_mtime; 415 lsp->lst_ctime = bsp->st_ctime; 416 #ifdef LINUX_STAT_HAS_NSEC 417 lsp->lst_atime_nsec = bsp->st_atimensec; 418 lsp->lst_mtime_nsec = bsp->st_mtimensec; 419 lsp->lst_ctime_nsec = bsp->st_ctimensec; 420 #endif 421 } 422 423 /* 424 * The stat functions below are plain sailing. stat and lstat are handled 425 * by one function to avoid code duplication. 426 */ 427 int 428 linux_sys_fstat(struct lwp *l, const struct linux_sys_fstat_args *uap, register_t *retval) 429 { 430 /* { 431 syscallarg(int) fd; 432 syscallarg(linux_stat *) sp; 433 } */ 434 struct linux_stat tmplst; 435 struct stat tmpst; 436 int error; 437 438 error = do_sys_fstat(SCARG(uap, fd), &tmpst); 439 if (error != 0) 440 return error; 441 bsd_to_linux_stat(&tmpst, &tmplst); 442 443 return copyout(&tmplst, SCARG(uap, sp), sizeof tmplst); 444 } 445 446 static int 447 linux_stat1(const struct linux_sys_stat_args *uap, register_t *retval, int flags) 448 { 449 struct linux_stat tmplst; 450 struct stat tmpst; 451 int error; 452 453 error = do_sys_stat(SCARG(uap, path), flags, &tmpst); 454 if (error != 0) 455 return error; 456 457 bsd_to_linux_stat(&tmpst, &tmplst); 458 459 return copyout(&tmplst, SCARG(uap, sp), sizeof tmplst); 460 } 461 462 int 463 linux_sys_stat(struct lwp *l, const struct linux_sys_stat_args *uap, register_t *retval) 464 { 465 /* { 466 syscallarg(const char *) path; 467 syscallarg(struct linux_stat *) sp; 468 } */ 469 470 return linux_stat1(uap, retval, FOLLOW); 471 } 472 473 /* Note: this is "newlstat" in the Linux sources */ 474 /* (we don't bother with the old lstat currently) */ 475 int 476 linux_sys_lstat(struct lwp *l, const struct linux_sys_lstat_args *uap, register_t *retval) 477 { 478 /* { 479 syscallarg(const char *) path; 480 syscallarg(struct linux_stat *) sp; 481 } */ 482 483 return linux_stat1((const void *)uap, retval, NOFOLLOW); 484 } 485 #endif /* !__amd64__ */ 486 487 /* 488 * The following syscalls are mostly here because of the alternate path check. 489 */ 490 int 491 linux_sys_unlink(struct lwp *l, const struct linux_sys_unlink_args *uap, register_t *retval) 492 { 493 /* { 494 syscallarg(const char *) path; 495 } */ 496 int error, error2; 497 struct pathbuf *pb; 498 struct nameidata nd; 499 500 error = sys_unlink(l, (const void *)uap, retval); 501 if (error != EPERM) 502 return (error); 503 504 /* 505 * Linux returns EISDIR if unlink(2) is called on a directory. 506 * We return EPERM in such cases. To emulate correct behaviour, 507 * check if the path points to directory and return EISDIR if this 508 * is the case. 509 * 510 * XXX this should really not copy in the path buffer twice... 511 */ 512 error2 = pathbuf_copyin(SCARG(uap, path), &pb); 513 if (error2) { 514 return error2; 515 } 516 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | TRYEMULROOT, pb); 517 if (namei(&nd) == 0) { 518 struct stat sb; 519 520 if (vn_stat(nd.ni_vp, &sb) == 0 521 && S_ISDIR(sb.st_mode)) 522 error = EISDIR; 523 524 vput(nd.ni_vp); 525 } 526 pathbuf_destroy(pb); 527 528 return (error); 529 } 530 531 int 532 linux_sys_mknod(struct lwp *l, const struct linux_sys_mknod_args *uap, register_t *retval) 533 { 534 /* { 535 syscallarg(const char *) path; 536 syscallarg(int) mode; 537 syscallarg(int) dev; 538 } */ 539 540 /* 541 * BSD handles FIFOs separately 542 */ 543 if (S_ISFIFO(SCARG(uap, mode))) { 544 struct sys_mkfifo_args bma; 545 546 SCARG(&bma, path) = SCARG(uap, path); 547 SCARG(&bma, mode) = SCARG(uap, mode); 548 return sys_mkfifo(l, &bma, retval); 549 } else { 550 551 /* 552 * Linux device numbers uses 8 bits for minor and 8 bits 553 * for major. Due to how we map our major and minor, 554 * this just fits into our dev_t. Just mask off the 555 * upper 16bit to remove any random junk. 556 */ 557 return do_sys_mknod(l, SCARG(uap, path), SCARG(uap, mode), 558 SCARG(uap, dev) & 0xffff, retval, UIO_USERSPACE); 559 } 560 } 561 562 /* 563 * This is just fsync() for now (just as it is in the Linux kernel) 564 * Note: this is not implemented under Linux on Alpha and Arm 565 * but should still be defined in our syscalls.master. 566 * (syscall #148 on the arm) 567 */ 568 int 569 linux_sys_fdatasync(struct lwp *l, const struct linux_sys_fdatasync_args *uap, register_t *retval) 570 { 571 /* { 572 syscallarg(int) fd; 573 } */ 574 575 return sys_fsync(l, (const void *)uap, retval); 576 } 577 578 /* 579 * pread(2). 580 */ 581 int 582 linux_sys_pread(struct lwp *l, const struct linux_sys_pread_args *uap, register_t *retval) 583 { 584 /* { 585 syscallarg(int) fd; 586 syscallarg(void *) buf; 587 syscallarg(size_t) nbyte; 588 syscallarg(linux_off_t) offset; 589 } */ 590 struct sys_pread_args pra; 591 592 SCARG(&pra, fd) = SCARG(uap, fd); 593 SCARG(&pra, buf) = SCARG(uap, buf); 594 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 595 SCARG(&pra, offset) = SCARG(uap, offset); 596 597 return sys_pread(l, &pra, retval); 598 } 599 600 /* 601 * pwrite(2). 602 */ 603 int 604 linux_sys_pwrite(struct lwp *l, const struct linux_sys_pwrite_args *uap, register_t *retval) 605 { 606 /* { 607 syscallarg(int) fd; 608 syscallarg(void *) buf; 609 syscallarg(size_t) nbyte; 610 syscallarg(linux_off_t) offset; 611 } */ 612 struct sys_pwrite_args pra; 613 614 SCARG(&pra, fd) = SCARG(uap, fd); 615 SCARG(&pra, buf) = SCARG(uap, buf); 616 SCARG(&pra, nbyte) = SCARG(uap, nbyte); 617 SCARG(&pra, offset) = SCARG(uap, offset); 618 619 return sys_pwrite(l, &pra, retval); 620 } 621 622 #define LINUX_NOT_SUPPORTED(fun) \ 623 int \ 624 fun(struct lwp *l, const struct fun##_args *uap, register_t *retval) \ 625 { \ 626 return EOPNOTSUPP; \ 627 } 628 629 LINUX_NOT_SUPPORTED(linux_sys_setxattr) 630 LINUX_NOT_SUPPORTED(linux_sys_lsetxattr) 631 LINUX_NOT_SUPPORTED(linux_sys_fsetxattr) 632 633 LINUX_NOT_SUPPORTED(linux_sys_getxattr) 634 LINUX_NOT_SUPPORTED(linux_sys_lgetxattr) 635 LINUX_NOT_SUPPORTED(linux_sys_fgetxattr) 636 637 LINUX_NOT_SUPPORTED(linux_sys_listxattr) 638 LINUX_NOT_SUPPORTED(linux_sys_llistxattr) 639 LINUX_NOT_SUPPORTED(linux_sys_flistxattr) 640 641 LINUX_NOT_SUPPORTED(linux_sys_removexattr) 642 LINUX_NOT_SUPPORTED(linux_sys_lremovexattr) 643 LINUX_NOT_SUPPORTED(linux_sys_fremovexattr) 644