2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 1994-1995 Søren Schmidt
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include "opt_compat.h"
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/capsicum.h>
38 #include <sys/dirent.h>
39 #include <sys/fcntl.h>
41 #include <sys/filedesc.h>
43 #include <sys/malloc.h>
45 #include <sys/mount.h>
46 #include <sys/mutex.h>
47 #include <sys/namei.h>
51 #include <sys/syscallsubr.h>
52 #include <sys/sysproto.h>
54 #include <sys/unistd.h>
55 #include <sys/vnode.h>
58 #include <compat/freebsd32/freebsd32_misc.h>
59 #include <machine/../linux32/linux.h>
60 #include <machine/../linux32/linux32_proto.h>
62 #include <machine/../linux/linux.h>
63 #include <machine/../linux/linux_proto.h>
65 #include <compat/linux/linux_misc.h>
66 #include <compat/linux/linux_util.h>
67 #include <compat/linux/linux_file.h>
69 static int linux_common_open(struct thread *, int, const char *, int, int,
71 static int linux_getdents_error(struct thread *, int, int);
73 static struct bsd_to_linux_bitmap seal_bitmap[] = {
74 BITMAP_1t1_LINUX(F_SEAL_SEAL),
75 BITMAP_1t1_LINUX(F_SEAL_SHRINK),
76 BITMAP_1t1_LINUX(F_SEAL_GROW),
77 BITMAP_1t1_LINUX(F_SEAL_WRITE),
80 #define MFD_HUGETLB_ENTRY(_size) \
82 .bsd_value = MFD_HUGE_##_size, \
83 .linux_value = LINUX_HUGETLB_FLAG_ENCODE_##_size \
85 static struct bsd_to_linux_bitmap mfd_bitmap[] = {
86 BITMAP_1t1_LINUX(MFD_CLOEXEC),
87 BITMAP_1t1_LINUX(MFD_ALLOW_SEALING),
88 BITMAP_1t1_LINUX(MFD_HUGETLB),
89 MFD_HUGETLB_ENTRY(64KB),
90 MFD_HUGETLB_ENTRY(512KB),
91 MFD_HUGETLB_ENTRY(1MB),
92 MFD_HUGETLB_ENTRY(2MB),
93 MFD_HUGETLB_ENTRY(8MB),
94 MFD_HUGETLB_ENTRY(16MB),
95 MFD_HUGETLB_ENTRY(32MB),
96 MFD_HUGETLB_ENTRY(256MB),
97 MFD_HUGETLB_ENTRY(512MB),
98 MFD_HUGETLB_ENTRY(1GB),
99 MFD_HUGETLB_ENTRY(2GB),
100 MFD_HUGETLB_ENTRY(16GB),
102 #undef MFD_HUGETLB_ENTRY
104 #ifdef LINUX_LEGACY_SYSCALLS
106 linux_creat(struct thread *td, struct linux_creat_args *args)
111 if (!LUSECONVPATH(td)) {
112 return (kern_openat(td, AT_FDCWD, args->path, UIO_USERSPACE,
113 O_WRONLY | O_CREAT | O_TRUNC, args->mode));
115 LCONVPATHEXIST(td, args->path, &path);
116 error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
117 O_WRONLY | O_CREAT | O_TRUNC, args->mode);
124 linux_common_openflags(int l_flags)
129 switch (l_flags & LINUX_O_ACCMODE) {
131 bsd_flags |= O_WRONLY;
137 bsd_flags |= O_RDONLY;
139 if (l_flags & LINUX_O_NDELAY)
140 bsd_flags |= O_NONBLOCK;
141 if (l_flags & LINUX_O_APPEND)
142 bsd_flags |= O_APPEND;
143 if (l_flags & LINUX_O_SYNC)
144 bsd_flags |= O_FSYNC;
145 if (l_flags & LINUX_O_CLOEXEC)
146 bsd_flags |= O_CLOEXEC;
147 if (l_flags & LINUX_O_NONBLOCK)
148 bsd_flags |= O_NONBLOCK;
149 if (l_flags & LINUX_O_ASYNC)
150 bsd_flags |= O_ASYNC;
151 if (l_flags & LINUX_O_CREAT)
152 bsd_flags |= O_CREAT;
153 if (l_flags & LINUX_O_TRUNC)
154 bsd_flags |= O_TRUNC;
155 if (l_flags & LINUX_O_EXCL)
157 if (l_flags & LINUX_O_NOCTTY)
158 bsd_flags |= O_NOCTTY;
159 if (l_flags & LINUX_O_DIRECT)
160 bsd_flags |= O_DIRECT;
161 if (l_flags & LINUX_O_NOFOLLOW)
162 bsd_flags |= O_NOFOLLOW;
163 if (l_flags & LINUX_O_DIRECTORY)
164 bsd_flags |= O_DIRECTORY;
165 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */
170 linux_common_open(struct thread *td, int dirfd, const char *path, int l_flags,
171 int mode, enum uio_seg seg)
173 struct proc *p = td->td_proc;
176 int bsd_flags, error;
178 bsd_flags = linux_common_openflags(l_flags);
179 error = kern_openat(td, dirfd, path, seg, bsd_flags, mode);
185 if (p->p_flag & P_CONTROLT)
187 if (bsd_flags & O_NOCTTY)
191 * XXX In between kern_openat() and fget(), another process
192 * having the same filedesc could use that fd without
195 fd = td->td_retval[0];
196 if (fget(td, fd, &cap_ioctl_rights, &fp) == 0) {
197 if (fp->f_type != DTYPE_VNODE) {
201 sx_slock(&proctree_lock);
203 if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
205 sx_sunlock(&proctree_lock);
206 /* XXXPJD: Verify if TIOCSCTTY is allowed. */
207 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
211 sx_sunlock(&proctree_lock);
221 linux_openat(struct thread *td, struct linux_openat_args *args)
226 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
227 if (!LUSECONVPATH(td)) {
228 return (linux_common_open(td, dfd, args->filename, args->flags,
229 args->mode, UIO_USERSPACE));
231 if (args->flags & LINUX_O_CREAT)
232 LCONVPATH_AT(td, args->filename, &path, 1, dfd);
234 LCONVPATH_AT(td, args->filename, &path, 0, dfd);
236 error = linux_common_open(td, dfd, path, args->flags, args->mode,
242 #ifdef LINUX_LEGACY_SYSCALLS
244 linux_open(struct thread *td, struct linux_open_args *args)
249 if (!LUSECONVPATH(td)) {
250 return (linux_common_open(td, AT_FDCWD, args->path, args->flags,
251 args->mode, UIO_USERSPACE));
253 if (args->flags & LINUX_O_CREAT)
254 LCONVPATHCREAT(td, args->path, &path);
256 LCONVPATHEXIST(td, args->path, &path);
258 error = linux_common_open(td, AT_FDCWD, path, args->flags, args->mode,
266 linux_name_to_handle_at(struct thread *td,
267 struct linux_name_to_handle_at_args *args)
269 static const l_int valid_flags = (LINUX_AT_SYMLINK_FOLLOW |
270 LINUX_AT_EMPTY_PATH);
271 static const l_uint fh_size = sizeof(fhandle_t);
276 int error, fd, bsd_flags;
278 if (args->flags & ~valid_flags)
280 if (args->flags & LINUX_AT_EMPTY_PATH)
281 /* XXX: not supported yet */
285 if (fd == LINUX_AT_FDCWD)
289 if (!(args->flags & LINUX_AT_SYMLINK_FOLLOW))
290 bsd_flags |= AT_SYMLINK_NOFOLLOW;
292 if (!LUSECONVPATH(td)) {
293 error = kern_getfhat(td, bsd_flags, fd, args->name,
294 UIO_USERSPACE, &fh, UIO_SYSSPACE);
298 LCONVPATH_AT(td, args->name, &path, 0, fd);
299 error = kern_getfhat(td, bsd_flags, fd, path, UIO_SYSSPACE,
306 /* Emit mount_id -- required before EOVERFLOW case. */
307 mount_id = (fh.fh_fsid.val[0] ^ fh.fh_fsid.val[1]);
308 error = copyout(&mount_id, args->mnt_id, sizeof(mount_id));
312 /* Check if there is room for handle. */
313 error = copyin(&args->handle->handle_bytes, &fh_bytes,
318 if (fh_bytes < fh_size) {
319 error = copyout(&fh_size, &args->handle->handle_bytes,
329 * We don't use handle_type for anything yet, but initialize a known
332 error = copyout(&mount_id, &args->handle->handle_type,
337 error = copyout(&fh, &args->handle->f_handle,
343 linux_open_by_handle_at(struct thread *td,
344 struct linux_open_by_handle_at_args *args)
347 int bsd_flags, error;
349 error = copyin(&args->handle->handle_bytes, &fh_bytes,
354 if (fh_bytes < sizeof(fhandle_t))
357 bsd_flags = linux_common_openflags(args->flags);
358 return (kern_fhopen(td, (void *)&args->handle->f_handle, bsd_flags));
362 linux_lseek(struct thread *td, struct linux_lseek_args *args)
365 return (kern_lseek(td, args->fdes, args->off, args->whence));
368 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
370 linux_llseek(struct thread *td, struct linux_llseek_args *args)
375 off = (args->olow) | (((off_t) args->ohigh) << 32);
377 error = kern_lseek(td, args->fd, off, args->whence);
381 error = copyout(td->td_retval, args->res, sizeof(off_t));
385 td->td_retval[0] = 0;
388 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
391 * Note that linux_getdents(2) and linux_getdents64(2) have the same
392 * arguments. They only differ in the definition of struct dirent they
394 * Note that linux_readdir(2) is a special case of linux_getdents(2)
395 * where count is always equals 1, meaning that the buffer is one
396 * dirent-structure in size and that the code can't handle more anyway.
397 * Note that linux_readdir(2) can't be implemented by means of linux_getdents(2)
398 * as in case when the *dent buffer size is equal to 1 linux_getdents(2) will
403 linux_getdents_error(struct thread *td, int fd, int err)
409 /* Linux return ENOTDIR in case when fd is not a directory. */
410 error = getvnode(td, fd, &cap_read_rights, &fp);
414 if (vp->v_type != VDIR) {
426 char d_name[LINUX_NAME_MAX + 1];
434 char d_name[LINUX_NAME_MAX + 1];
438 * Linux uses the last byte in the dirent buffer to store d_type,
439 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
441 #define LINUX_RECLEN(namlen) \
442 roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong))
444 #define LINUX_RECLEN64(namlen) \
445 roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \
448 #ifdef LINUX_LEGACY_SYSCALLS
450 linux_getdents(struct thread *td, struct linux_getdents_args *args)
453 caddr_t inp, buf; /* BSD-format */
454 int len, reclen; /* BSD-format */
455 caddr_t outp; /* Linux-format */
456 int resid, linuxreclen; /* Linux-format */
457 caddr_t lbuf; /* Linux-format */
459 struct l_dirent *linux_dirent;
463 buflen = min(args->count, MAXBSIZE);
464 buf = malloc(buflen, M_TEMP, M_WAITOK);
466 error = kern_getdirentries(td, args->fd, buf, buflen,
467 &base, NULL, UIO_SYSSPACE);
469 error = linux_getdents_error(td, args->fd, error);
473 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
475 len = td->td_retval[0];
477 outp = (caddr_t)args->dent;
482 bdp = (struct dirent *) inp;
483 reclen = bdp->d_reclen;
484 linuxreclen = LINUX_RECLEN(bdp->d_namlen);
486 * No more space in the user supplied dirent buffer.
489 if (resid < linuxreclen) {
494 linux_dirent = (struct l_dirent*)lbuf;
495 linux_dirent->d_ino = bdp->d_fileno;
496 linux_dirent->d_off = base + reclen;
497 linux_dirent->d_reclen = linuxreclen;
499 * Copy d_type to last byte of l_dirent buffer
501 lbuf[linuxreclen - 1] = bdp->d_type;
502 strlcpy(linux_dirent->d_name, bdp->d_name,
503 linuxreclen - offsetof(struct l_dirent, d_name)-1);
504 error = copyout(linux_dirent, outp, linuxreclen);
512 retval += linuxreclen;
514 resid -= linuxreclen;
516 td->td_retval[0] = retval;
527 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
530 caddr_t inp, buf; /* BSD-format */
531 int len, reclen; /* BSD-format */
532 caddr_t outp; /* Linux-format */
533 int resid, linuxreclen; /* Linux-format */
534 caddr_t lbuf; /* Linux-format */
536 struct l_dirent64 *linux_dirent64;
540 buflen = min(args->count, MAXBSIZE);
541 buf = malloc(buflen, M_TEMP, M_WAITOK);
543 error = kern_getdirentries(td, args->fd, buf, buflen,
544 &base, NULL, UIO_SYSSPACE);
546 error = linux_getdents_error(td, args->fd, error);
550 lbuf = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
552 len = td->td_retval[0];
554 outp = (caddr_t)args->dirent;
559 bdp = (struct dirent *) inp;
560 reclen = bdp->d_reclen;
561 linuxreclen = LINUX_RECLEN64(bdp->d_namlen);
563 * No more space in the user supplied dirent buffer.
566 if (resid < linuxreclen) {
571 linux_dirent64 = (struct l_dirent64*)lbuf;
572 linux_dirent64->d_ino = bdp->d_fileno;
573 linux_dirent64->d_off = base + reclen;
574 linux_dirent64->d_reclen = linuxreclen;
575 linux_dirent64->d_type = bdp->d_type;
576 strlcpy(linux_dirent64->d_name, bdp->d_name,
577 linuxreclen - offsetof(struct l_dirent64, d_name));
578 error = copyout(linux_dirent64, outp, linuxreclen);
586 retval += linuxreclen;
588 resid -= linuxreclen;
590 td->td_retval[0] = retval;
599 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
601 linux_readdir(struct thread *td, struct linux_readdir_args *args)
604 caddr_t buf; /* BSD-format */
605 int linuxreclen; /* Linux-format */
606 caddr_t lbuf; /* Linux-format */
608 struct l_dirent *linux_dirent;
611 buflen = LINUX_RECLEN(LINUX_NAME_MAX);
612 buf = malloc(buflen, M_TEMP, M_WAITOK);
614 error = kern_getdirentries(td, args->fd, buf, buflen,
615 &base, NULL, UIO_SYSSPACE);
617 error = linux_getdents_error(td, args->fd, error);
620 if (td->td_retval[0] == 0)
623 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_TEMP, M_WAITOK | M_ZERO);
625 bdp = (struct dirent *) buf;
626 linuxreclen = LINUX_RECLEN(bdp->d_namlen);
628 linux_dirent = (struct l_dirent*)lbuf;
629 linux_dirent->d_ino = bdp->d_fileno;
630 linux_dirent->d_off = linuxreclen;
631 linux_dirent->d_reclen = bdp->d_namlen;
632 strlcpy(linux_dirent->d_name, bdp->d_name,
633 linuxreclen - offsetof(struct l_dirent, d_name));
634 error = copyout(linux_dirent, args->dent, linuxreclen);
636 td->td_retval[0] = linuxreclen;
643 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
646 * These exist mainly for hooks for doing /compat/linux translation.
649 #ifdef LINUX_LEGACY_SYSCALLS
651 linux_access(struct thread *td, struct linux_access_args *args)
656 /* Linux convention. */
657 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
660 if (!LUSECONVPATH(td)) {
661 error = kern_accessat(td, AT_FDCWD, args->path, UIO_USERSPACE, 0,
664 LCONVPATHEXIST(td, args->path, &path);
665 error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0,
675 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
680 /* Linux convention. */
681 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
684 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
685 if (!LUSECONVPATH(td)) {
686 error = kern_accessat(td, dfd, args->filename, UIO_USERSPACE, 0, args->amode);
688 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
689 error = kern_accessat(td, dfd, path, UIO_SYSSPACE, 0, args->amode);
696 #ifdef LINUX_LEGACY_SYSCALLS
698 linux_unlink(struct thread *td, struct linux_unlink_args *args)
704 if (!LUSECONVPATH(td)) {
705 error = kern_funlinkat(td, AT_FDCWD, args->path, FD_NONE,
706 UIO_USERSPACE, 0, 0);
707 if (error == EPERM) {
708 /* Introduce POSIX noncompliant behaviour of Linux */
709 if (kern_statat(td, 0, AT_FDCWD, args->path,
710 UIO_SYSSPACE, &st, NULL) == 0) {
711 if (S_ISDIR(st.st_mode))
716 LCONVPATHEXIST(td, args->path, &path);
717 error = kern_funlinkat(td, AT_FDCWD, path, FD_NONE, UIO_SYSSPACE, 0, 0);
718 if (error == EPERM) {
719 /* Introduce POSIX noncompliant behaviour of Linux */
720 if (kern_statat(td, 0, AT_FDCWD, path, UIO_SYSSPACE, &st,
722 if (S_ISDIR(st.st_mode))
734 linux_unlinkat_impl(struct thread *td, enum uio_seg pathseg, const char *path,
735 int dfd, struct linux_unlinkat_args *args)
740 if (args->flag & LINUX_AT_REMOVEDIR)
741 error = kern_frmdirat(td, dfd, path, FD_NONE, pathseg, 0);
743 error = kern_funlinkat(td, dfd, path, FD_NONE, pathseg, 0, 0);
744 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
745 /* Introduce POSIX noncompliant behaviour of Linux */
746 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
747 UIO_SYSSPACE, &st, NULL) == 0 && S_ISDIR(st.st_mode))
754 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
759 if (args->flag & ~LINUX_AT_REMOVEDIR)
761 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
762 if (!LUSECONVPATH(td)) {
763 return (linux_unlinkat_impl(td, UIO_USERSPACE, args->pathname,
766 LCONVPATHEXIST_AT(td, args->pathname, &path, dfd);
767 error = linux_unlinkat_impl(td, UIO_SYSSPACE, path, dfd, args);
772 linux_chdir(struct thread *td, struct linux_chdir_args *args)
777 if (!LUSECONVPATH(td)) {
778 return (kern_chdir(td, args->path, UIO_USERSPACE));
780 LCONVPATHEXIST(td, args->path, &path);
781 error = kern_chdir(td, path, UIO_SYSSPACE);
786 #ifdef LINUX_LEGACY_SYSCALLS
788 linux_chmod(struct thread *td, struct linux_chmod_args *args)
793 if (!LUSECONVPATH(td)) {
794 return (kern_fchmodat(td, AT_FDCWD, args->path, UIO_USERSPACE,
797 LCONVPATHEXIST(td, args->path, &path);
798 error = kern_fchmodat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode, 0);
805 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
810 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
811 if (!LUSECONVPATH(td)) {
812 return (kern_fchmodat(td, dfd, args->filename, UIO_USERSPACE,
815 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
816 error = kern_fchmodat(td, dfd, path, UIO_SYSSPACE, args->mode, 0);
821 #ifdef LINUX_LEGACY_SYSCALLS
823 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
828 if (!LUSECONVPATH(td)) {
829 return (kern_mkdirat(td, AT_FDCWD, args->path, UIO_USERSPACE, args->mode));
831 LCONVPATHCREAT(td, args->path, &path);
832 error = kern_mkdirat(td, AT_FDCWD, path, UIO_SYSSPACE, args->mode);
839 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
844 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
845 if (!LUSECONVPATH(td)) {
846 return (kern_mkdirat(td, dfd, args->pathname, UIO_USERSPACE, args->mode));
848 LCONVPATHCREAT_AT(td, args->pathname, &path, dfd);
849 error = kern_mkdirat(td, dfd, path, UIO_SYSSPACE, args->mode);
854 #ifdef LINUX_LEGACY_SYSCALLS
856 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
861 if (!LUSECONVPATH(td)) {
862 return (kern_frmdirat(td, AT_FDCWD, args->path, FD_NONE,
865 LCONVPATHEXIST(td, args->path, &path);
866 error = kern_frmdirat(td, AT_FDCWD, path, FD_NONE, UIO_SYSSPACE, 0);
872 linux_rename(struct thread *td, struct linux_rename_args *args)
877 if (!LUSECONVPATH(td)) {
878 return (kern_renameat(td, AT_FDCWD, args->from, AT_FDCWD,
879 args->to, UIO_USERSPACE));
881 LCONVPATHEXIST(td, args->from, &from);
882 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
883 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
888 error = kern_renameat(td, AT_FDCWD, from, AT_FDCWD, to, UIO_SYSSPACE);
896 linux_renameat(struct thread *td, struct linux_renameat_args *args)
898 struct linux_renameat2_args renameat2_args = {
899 .olddfd = args->olddfd,
900 .oldname = args->oldname,
901 .newdfd = args->newdfd,
902 .newname = args->newname,
906 return (linux_renameat2(td, &renameat2_args));
910 linux_renameat2(struct thread *td, struct linux_renameat2_args *args)
913 int error, olddfd, newdfd;
915 if (args->flags != 0) {
916 if (args->flags & ~(LINUX_RENAME_EXCHANGE |
917 LINUX_RENAME_NOREPLACE | LINUX_RENAME_WHITEOUT))
919 if (args->flags & LINUX_RENAME_EXCHANGE &&
920 args->flags & (LINUX_RENAME_NOREPLACE |
921 LINUX_RENAME_WHITEOUT))
925 * This spams the console on Ubuntu Focal.
927 * What's needed here is a general mechanism to let users know
928 * about missing features without hogging the system.
930 linux_msg(td, "renameat2 unsupported flags 0x%x",
936 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
937 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
938 if (!LUSECONVPATH(td)) {
939 return (kern_renameat(td, olddfd, args->oldname, newdfd,
940 args->newname, UIO_USERSPACE));
942 LCONVPATHEXIST_AT(td, args->oldname, &from, olddfd);
943 /* Expand LCONVPATHCREATE so that `from' can be freed on errors */
944 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
949 error = kern_renameat(td, olddfd, from, newdfd, to, UIO_SYSSPACE);
955 #ifdef LINUX_LEGACY_SYSCALLS
957 linux_symlink(struct thread *td, struct linux_symlink_args *args)
962 if (!LUSECONVPATH(td)) {
963 return (kern_symlinkat(td, args->path, AT_FDCWD, args->to,
966 LCONVPATHEXIST(td, args->path, &path);
967 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
968 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
973 error = kern_symlinkat(td, path, AT_FDCWD, to, UIO_SYSSPACE);
981 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
986 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
987 if (!LUSECONVPATH(td)) {
988 return (kern_symlinkat(td, args->oldname, dfd, args->newname,
991 LCONVPATHEXIST(td, args->oldname, &path);
992 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
993 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, dfd);
998 error = kern_symlinkat(td, path, dfd, to, UIO_SYSSPACE);
1004 #ifdef LINUX_LEGACY_SYSCALLS
1006 linux_readlink(struct thread *td, struct linux_readlink_args *args)
1011 if (!LUSECONVPATH(td)) {
1012 return (kern_readlinkat(td, AT_FDCWD, args->name, UIO_USERSPACE,
1013 args->buf, UIO_USERSPACE, args->count));
1015 LCONVPATHEXIST(td, args->name, &name);
1016 error = kern_readlinkat(td, AT_FDCWD, name, UIO_SYSSPACE,
1017 args->buf, UIO_USERSPACE, args->count);
1024 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
1029 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1030 if (!LUSECONVPATH(td)) {
1031 return (kern_readlinkat(td, dfd, args->path, UIO_USERSPACE,
1032 args->buf, UIO_USERSPACE, args->bufsiz));
1034 LCONVPATHEXIST_AT(td, args->path, &name, dfd);
1035 error = kern_readlinkat(td, dfd, name, UIO_SYSSPACE, args->buf,
1036 UIO_USERSPACE, args->bufsiz);
1042 linux_truncate(struct thread *td, struct linux_truncate_args *args)
1047 if (!LUSECONVPATH(td)) {
1048 return (kern_truncate(td, args->path, UIO_USERSPACE, args->length));
1050 LCONVPATHEXIST(td, args->path, &path);
1051 error = kern_truncate(td, path, UIO_SYSSPACE, args->length);
1056 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1058 linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
1064 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1065 length = PAIR32TO64(off_t, args->length);
1067 length = args->length;
1070 if (!LUSECONVPATH(td)) {
1071 return (kern_truncate(td, args->path, UIO_USERSPACE, length));
1073 LCONVPATHEXIST(td, args->path, &path);
1074 error = kern_truncate(td, path, UIO_SYSSPACE, length);
1078 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1081 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
1084 return (kern_ftruncate(td, args->fd, args->length));
1087 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1089 linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args)
1093 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1094 length = PAIR32TO64(off_t, args->length);
1096 length = args->length;
1099 return (kern_ftruncate(td, args->fd, length));
1103 #ifdef LINUX_LEGACY_SYSCALLS
1105 linux_link(struct thread *td, struct linux_link_args *args)
1110 if (!LUSECONVPATH(td)) {
1111 return (kern_linkat(td, AT_FDCWD, AT_FDCWD, args->path, args->to,
1112 UIO_USERSPACE, FOLLOW));
1114 LCONVPATHEXIST(td, args->path, &path);
1115 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
1116 error = linux_emul_convpath(td, args->to, UIO_USERSPACE, &to, 1, AT_FDCWD);
1121 error = kern_linkat(td, AT_FDCWD, AT_FDCWD, path, to, UIO_SYSSPACE,
1130 linux_linkat(struct thread *td, struct linux_linkat_args *args)
1133 int error, olddfd, newdfd, follow;
1135 if (args->flag & ~LINUX_AT_SYMLINK_FOLLOW)
1138 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
1139 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
1140 follow = (args->flag & LINUX_AT_SYMLINK_FOLLOW) == 0 ? NOFOLLOW :
1142 if (!LUSECONVPATH(td)) {
1143 return (kern_linkat(td, olddfd, newdfd, args->oldname,
1144 args->newname, UIO_USERSPACE, follow));
1146 LCONVPATHEXIST_AT(td, args->oldname, &path, olddfd);
1147 /* Expand LCONVPATHCREATE so that `path' can be freed on errors */
1148 error = linux_emul_convpath(td, args->newname, UIO_USERSPACE, &to, 1, newdfd);
1153 error = kern_linkat(td, olddfd, newdfd, path, to, UIO_SYSSPACE, follow);
1160 linux_fdatasync(struct thread *td, struct linux_fdatasync_args *uap)
1163 return (kern_fsync(td, uap->fd, false));
1167 linux_sync_file_range(struct thread *td, struct linux_sync_file_range_args *uap)
1169 off_t nbytes, offset;
1171 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1172 nbytes = PAIR32TO64(off_t, uap->nbytes);
1173 offset = PAIR32TO64(off_t, uap->offset);
1175 nbytes = uap->nbytes;
1176 offset = uap->offset;
1179 if (offset < 0 || nbytes < 0 ||
1180 (uap->flags & ~(LINUX_SYNC_FILE_RANGE_WAIT_BEFORE |
1181 LINUX_SYNC_FILE_RANGE_WRITE |
1182 LINUX_SYNC_FILE_RANGE_WAIT_AFTER)) != 0) {
1186 return (kern_fsync(td, uap->fd, false));
1190 linux_pread(struct thread *td, struct linux_pread_args *uap)
1196 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1197 offset = PAIR32TO64(off_t, uap->offset);
1199 offset = uap->offset;
1202 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, offset);
1204 /* This seems to violate POSIX but Linux does it. */
1205 error = fgetvp(td, uap->fd, &cap_pread_rights, &vp);
1208 if (vp->v_type == VDIR)
1216 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap)
1220 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1221 offset = PAIR32TO64(off_t, uap->offset);
1223 offset = uap->offset;
1226 return (kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, offset));
1230 linux_preadv(struct thread *td, struct linux_preadv_args *uap)
1237 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES
1238 * pos_l and pos_h, respectively, contain the
1239 * low order and high order 32 bits of offset.
1241 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) <<
1242 (sizeof(offset) * 4)) | uap->pos_l;
1245 #ifdef COMPAT_LINUX32
1246 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
1248 error = copyinuio(uap->vec, uap->vlen, &auio);
1252 error = kern_preadv(td, uap->fd, auio, offset);
1258 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap)
1265 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES
1266 * pos_l and pos_h, respectively, contain the
1267 * low order and high order 32 bits of offset.
1269 offset = (((off_t)uap->pos_h << (sizeof(offset) * 4)) <<
1270 (sizeof(offset) * 4)) | uap->pos_l;
1273 #ifdef COMPAT_LINUX32
1274 error = linux32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
1276 error = copyinuio(uap->vec, uap->vlen, &auio);
1280 error = kern_pwritev(td, uap->fd, auio, offset);
1286 linux_mount(struct thread *td, struct linux_mount_args *args)
1288 struct mntarg *ma = NULL;
1289 char *fstypename, *mntonname, *mntfromname, *data;
1292 fstypename = malloc(MNAMELEN, M_TEMP, M_WAITOK);
1293 mntonname = malloc(MNAMELEN, M_TEMP, M_WAITOK);
1294 mntfromname = malloc(MNAMELEN, M_TEMP, M_WAITOK);
1296 error = copyinstr(args->filesystemtype, fstypename, MNAMELEN - 1,
1300 if (args->specialfile != NULL) {
1301 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
1305 mntfromname[0] = '\0';
1307 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
1311 if (strcmp(fstypename, "ext2") == 0) {
1312 strcpy(fstypename, "ext2fs");
1313 } else if (strcmp(fstypename, "proc") == 0) {
1314 strcpy(fstypename, "linprocfs");
1315 } else if (strcmp(fstypename, "vfat") == 0) {
1316 strcpy(fstypename, "msdosfs");
1317 } else if (strcmp(fstypename, "fuse") == 0) {
1318 char *fuse_options, *fuse_option, *fuse_name;
1320 if (strcmp(mntfromname, "fuse") == 0)
1321 strcpy(mntfromname, "/dev/fuse");
1323 strcpy(fstypename, "fusefs");
1324 data = malloc(MNAMELEN, M_TEMP, M_WAITOK);
1325 error = copyinstr(args->data, data, MNAMELEN - 1, NULL);
1329 fuse_options = data;
1330 while ((fuse_option = strsep(&fuse_options, ",")) != NULL) {
1331 fuse_name = strsep(&fuse_option, "=");
1332 if (fuse_name == NULL || fuse_option == NULL)
1334 ma = mount_arg(ma, fuse_name, fuse_option, -1);
1338 * The FUSE server uses Linux errno values instead of FreeBSD
1339 * ones; add a flag to tell fuse(4) to do errno translation.
1341 ma = mount_arg(ma, "linux_errnos", "1", -1);
1347 * Linux SYNC flag is not included; the closest equivalent
1348 * FreeBSD has is !ASYNC, which is our default.
1350 if (args->rwflag & LINUX_MS_RDONLY)
1351 fsflags |= MNT_RDONLY;
1352 if (args->rwflag & LINUX_MS_NOSUID)
1353 fsflags |= MNT_NOSUID;
1354 if (args->rwflag & LINUX_MS_NOEXEC)
1355 fsflags |= MNT_NOEXEC;
1356 if (args->rwflag & LINUX_MS_REMOUNT)
1357 fsflags |= MNT_UPDATE;
1359 ma = mount_arg(ma, "fstype", fstypename, -1);
1360 ma = mount_arg(ma, "fspath", mntonname, -1);
1361 ma = mount_arg(ma, "from", mntfromname, -1);
1362 error = kernel_mount(ma, fsflags);
1364 free(fstypename, M_TEMP);
1365 free(mntonname, M_TEMP);
1366 free(mntfromname, M_TEMP);
1371 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1373 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
1376 return (kern_unmount(td, args->path, 0));
1378 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1380 #ifdef LINUX_LEGACY_SYSCALLS
1382 linux_umount(struct thread *td, struct linux_umount_args *args)
1387 if ((args->flags & LINUX_MNT_FORCE) != 0) {
1388 args->flags &= ~LINUX_MNT_FORCE;
1391 if (args->flags != 0) {
1392 linux_msg(td, "unsupported umount2 flags %#x", args->flags);
1396 return (kern_unmount(td, args->path, flags));
1401 * fcntl family of syscalls
1411 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1417 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
1419 switch (linux_flock->l_type) {
1421 bsd_flock->l_type = F_RDLCK;
1424 bsd_flock->l_type = F_WRLCK;
1427 bsd_flock->l_type = F_UNLCK;
1430 bsd_flock->l_type = -1;
1433 bsd_flock->l_whence = linux_flock->l_whence;
1434 bsd_flock->l_start = (off_t)linux_flock->l_start;
1435 bsd_flock->l_len = (off_t)linux_flock->l_len;
1436 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1437 bsd_flock->l_sysid = 0;
1441 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
1443 switch (bsd_flock->l_type) {
1445 linux_flock->l_type = LINUX_F_RDLCK;
1448 linux_flock->l_type = LINUX_F_WRLCK;
1451 linux_flock->l_type = LINUX_F_UNLCK;
1454 linux_flock->l_whence = bsd_flock->l_whence;
1455 linux_flock->l_start = (l_off_t)bsd_flock->l_start;
1456 linux_flock->l_len = (l_off_t)bsd_flock->l_len;
1457 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1460 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1468 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1474 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
1476 switch (linux_flock->l_type) {
1478 bsd_flock->l_type = F_RDLCK;
1481 bsd_flock->l_type = F_WRLCK;
1484 bsd_flock->l_type = F_UNLCK;
1487 bsd_flock->l_type = -1;
1490 bsd_flock->l_whence = linux_flock->l_whence;
1491 bsd_flock->l_start = (off_t)linux_flock->l_start;
1492 bsd_flock->l_len = (off_t)linux_flock->l_len;
1493 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1494 bsd_flock->l_sysid = 0;
1498 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
1500 switch (bsd_flock->l_type) {
1502 linux_flock->l_type = LINUX_F_RDLCK;
1505 linux_flock->l_type = LINUX_F_WRLCK;
1508 linux_flock->l_type = LINUX_F_UNLCK;
1511 linux_flock->l_whence = bsd_flock->l_whence;
1512 linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
1513 linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
1514 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1516 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1519 fcntl_common(struct thread *td, struct linux_fcntl_args *args)
1521 struct l_flock linux_flock;
1522 struct flock bsd_flock;
1527 switch (args->cmd) {
1529 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
1532 return (kern_fcntl(td, args->fd, F_GETFD, 0));
1535 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
1538 error = kern_fcntl(td, args->fd, F_GETFL, 0);
1539 result = td->td_retval[0];
1540 td->td_retval[0] = 0;
1541 if (result & O_RDONLY)
1542 td->td_retval[0] |= LINUX_O_RDONLY;
1543 if (result & O_WRONLY)
1544 td->td_retval[0] |= LINUX_O_WRONLY;
1545 if (result & O_RDWR)
1546 td->td_retval[0] |= LINUX_O_RDWR;
1547 if (result & O_NDELAY)
1548 td->td_retval[0] |= LINUX_O_NONBLOCK;
1549 if (result & O_APPEND)
1550 td->td_retval[0] |= LINUX_O_APPEND;
1551 if (result & O_FSYNC)
1552 td->td_retval[0] |= LINUX_O_SYNC;
1553 if (result & O_ASYNC)
1554 td->td_retval[0] |= LINUX_O_ASYNC;
1555 #ifdef LINUX_O_NOFOLLOW
1556 if (result & O_NOFOLLOW)
1557 td->td_retval[0] |= LINUX_O_NOFOLLOW;
1559 #ifdef LINUX_O_DIRECT
1560 if (result & O_DIRECT)
1561 td->td_retval[0] |= LINUX_O_DIRECT;
1567 if (args->arg & LINUX_O_NDELAY)
1569 if (args->arg & LINUX_O_APPEND)
1571 if (args->arg & LINUX_O_SYNC)
1573 if (args->arg & LINUX_O_ASYNC)
1575 #ifdef LINUX_O_NOFOLLOW
1576 if (args->arg & LINUX_O_NOFOLLOW)
1579 #ifdef LINUX_O_DIRECT
1580 if (args->arg & LINUX_O_DIRECT)
1583 return (kern_fcntl(td, args->fd, F_SETFL, arg));
1586 error = copyin((void *)args->arg, &linux_flock,
1587 sizeof(linux_flock));
1590 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1591 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1594 bsd_to_linux_flock(&bsd_flock, &linux_flock);
1595 return (copyout(&linux_flock, (void *)args->arg,
1596 sizeof(linux_flock)));
1599 error = copyin((void *)args->arg, &linux_flock,
1600 sizeof(linux_flock));
1603 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1604 return (kern_fcntl(td, args->fd, F_SETLK,
1605 (intptr_t)&bsd_flock));
1607 case LINUX_F_SETLKW:
1608 error = copyin((void *)args->arg, &linux_flock,
1609 sizeof(linux_flock));
1612 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1613 return (kern_fcntl(td, args->fd, F_SETLKW,
1614 (intptr_t)&bsd_flock));
1616 case LINUX_F_GETOWN:
1617 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
1619 case LINUX_F_SETOWN:
1621 * XXX some Linux applications depend on F_SETOWN having no
1622 * significant effect for pipes (SIGIO is not delivered for
1623 * pipes under Linux-2.2.35 at least).
1625 error = fget(td, args->fd,
1626 &cap_fcntl_rights, &fp);
1629 if (fp->f_type == DTYPE_PIPE) {
1635 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
1637 case LINUX_F_DUPFD_CLOEXEC:
1638 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg));
1640 * Our F_SEAL_* values match Linux one for maximum compatibility. So we
1641 * only needed to account for different values for fcntl(2) commands.
1643 case LINUX_F_GET_SEALS:
1644 error = kern_fcntl(td, args->fd, F_GET_SEALS, 0);
1647 td->td_retval[0] = bsd_to_linux_bits(td->td_retval[0],
1651 case LINUX_F_ADD_SEALS:
1652 return (kern_fcntl(td, args->fd, F_ADD_SEALS,
1653 linux_to_bsd_bits(args->arg, seal_bitmap, 0)));
1655 linux_msg(td, "unsupported fcntl cmd %d\n", args->cmd);
1661 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
1664 return (fcntl_common(td, args));
1667 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1669 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
1671 struct l_flock64 linux_flock;
1672 struct flock bsd_flock;
1673 struct linux_fcntl_args fcntl_args;
1676 switch (args->cmd) {
1677 case LINUX_F_GETLK64:
1678 error = copyin((void *)args->arg, &linux_flock,
1679 sizeof(linux_flock));
1682 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1683 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1686 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
1687 return (copyout(&linux_flock, (void *)args->arg,
1688 sizeof(linux_flock)));
1690 case LINUX_F_SETLK64:
1691 error = copyin((void *)args->arg, &linux_flock,
1692 sizeof(linux_flock));
1695 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1696 return (kern_fcntl(td, args->fd, F_SETLK,
1697 (intptr_t)&bsd_flock));
1699 case LINUX_F_SETLKW64:
1700 error = copyin((void *)args->arg, &linux_flock,
1701 sizeof(linux_flock));
1704 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1705 return (kern_fcntl(td, args->fd, F_SETLKW,
1706 (intptr_t)&bsd_flock));
1709 fcntl_args.fd = args->fd;
1710 fcntl_args.cmd = args->cmd;
1711 fcntl_args.arg = args->arg;
1712 return (fcntl_common(td, &fcntl_args));
1714 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1716 #ifdef LINUX_LEGACY_SYSCALLS
1718 linux_chown(struct thread *td, struct linux_chown_args *args)
1723 if (!LUSECONVPATH(td)) {
1724 return (kern_fchownat(td, AT_FDCWD, args->path, UIO_USERSPACE,
1725 args->uid, args->gid, 0));
1727 LCONVPATHEXIST(td, args->path, &path);
1728 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid,
1736 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
1739 int error, dfd, flag;
1741 if (args->flag & ~LINUX_AT_SYMLINK_NOFOLLOW)
1744 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1745 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
1746 AT_SYMLINK_NOFOLLOW;
1747 if (!LUSECONVPATH(td)) {
1748 return (kern_fchownat(td, dfd, args->filename, UIO_USERSPACE,
1749 args->uid, args->gid, flag));
1751 LCONVPATHEXIST_AT(td, args->filename, &path, dfd);
1752 error = kern_fchownat(td, dfd, path, UIO_SYSSPACE, args->uid, args->gid,
1758 #ifdef LINUX_LEGACY_SYSCALLS
1760 linux_lchown(struct thread *td, struct linux_lchown_args *args)
1765 if (!LUSECONVPATH(td)) {
1766 return (kern_fchownat(td, AT_FDCWD, args->path, UIO_USERSPACE, args->uid,
1767 args->gid, AT_SYMLINK_NOFOLLOW));
1769 LCONVPATHEXIST(td, args->path, &path);
1770 error = kern_fchownat(td, AT_FDCWD, path, UIO_SYSSPACE, args->uid, args->gid,
1771 AT_SYMLINK_NOFOLLOW);
1778 convert_fadvice(int advice)
1781 case LINUX_POSIX_FADV_NORMAL:
1782 return (POSIX_FADV_NORMAL);
1783 case LINUX_POSIX_FADV_RANDOM:
1784 return (POSIX_FADV_RANDOM);
1785 case LINUX_POSIX_FADV_SEQUENTIAL:
1786 return (POSIX_FADV_SEQUENTIAL);
1787 case LINUX_POSIX_FADV_WILLNEED:
1788 return (POSIX_FADV_WILLNEED);
1789 case LINUX_POSIX_FADV_DONTNEED:
1790 return (POSIX_FADV_DONTNEED);
1791 case LINUX_POSIX_FADV_NOREUSE:
1792 return (POSIX_FADV_NOREUSE);
1799 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
1804 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1805 offset = PAIR32TO64(off_t, args->offset);
1807 offset = args->offset;
1810 advice = convert_fadvice(args->advice);
1813 return (kern_posix_fadvise(td, args->fd, offset, args->len, advice));
1816 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1818 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args)
1823 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1824 len = PAIR32TO64(off_t, args->len);
1825 offset = PAIR32TO64(off_t, args->offset);
1828 offset = args->offset;
1831 advice = convert_fadvice(args->advice);
1834 return (kern_posix_fadvise(td, args->fd, offset, len, advice));
1836 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1838 #ifdef LINUX_LEGACY_SYSCALLS
1840 linux_pipe(struct thread *td, struct linux_pipe_args *args)
1845 error = kern_pipe(td, fildes, 0, NULL, NULL);
1849 error = copyout(fildes, args->pipefds, sizeof(fildes));
1851 (void)kern_close(td, fildes[0]);
1852 (void)kern_close(td, fildes[1]);
1860 linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
1865 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
1869 if ((args->flags & LINUX_O_NONBLOCK) != 0)
1870 flags |= O_NONBLOCK;
1871 if ((args->flags & LINUX_O_CLOEXEC) != 0)
1873 error = kern_pipe(td, fildes, flags, NULL, NULL);
1877 error = copyout(fildes, args->pipefds, sizeof(fildes));
1879 (void)kern_close(td, fildes[0]);
1880 (void)kern_close(td, fildes[1]);
1887 linux_dup3(struct thread *td, struct linux_dup3_args *args)
1892 if (args->oldfd == args->newfd)
1894 if ((args->flags & ~LINUX_O_CLOEXEC) != 0)
1896 if (args->flags & LINUX_O_CLOEXEC)
1897 cmd = F_DUP2FD_CLOEXEC;
1901 newfd = args->newfd;
1902 return (kern_fcntl(td, args->oldfd, cmd, newfd));
1906 linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
1911 * We emulate only posix_fallocate system call for which
1914 if (args->mode != 0)
1915 return (EOPNOTSUPP);
1917 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1918 len = PAIR32TO64(off_t, args->len);
1919 offset = PAIR32TO64(off_t, args->offset);
1922 offset = args->offset;
1925 return (kern_posix_fallocate(td, args->fd, offset, len));
1929 linux_copy_file_range(struct thread *td, struct linux_copy_file_range_args
1932 l_loff_t inoff, outoff, *inoffp, *outoffp;
1936 * copy_file_range(2) on Linux doesn't define any flags (yet), so is
1937 * the native implementation. Enforce it.
1939 if (args->flags != 0) {
1940 linux_msg(td, "copy_file_range unsupported flags 0x%x",
1945 inoffp = outoffp = NULL;
1946 if (args->off_in != NULL) {
1947 error = copyin(args->off_in, &inoff, sizeof(l_loff_t));
1952 if (args->off_out != NULL) {
1953 error = copyin(args->off_out, &outoff, sizeof(l_loff_t));
1959 error = kern_copy_file_range(td, args->fd_in, inoffp, args->fd_out,
1960 outoffp, args->len, flags);
1961 if (error == 0 && args->off_in != NULL)
1962 error = copyout(inoffp, args->off_in, sizeof(l_loff_t));
1963 if (error == 0 && args->off_out != NULL)
1964 error = copyout(outoffp, args->off_out, sizeof(l_loff_t));
1968 #define LINUX_MEMFD_PREFIX "memfd:"
1971 linux_memfd_create(struct thread *td, struct linux_memfd_create_args *args)
1973 char memfd_name[LINUX_NAME_MAX + 1];
1974 int error, flags, shmflags, oflags;
1977 * This is our clever trick to avoid the heap allocation to copy in the
1978 * uname. We don't really need to go this far out of our way, but it
1979 * does keep the rest of this function fairly clean as they don't have
1980 * to worry about cleanup on the way out.
1982 error = copyinstr(args->uname_ptr,
1983 memfd_name + sizeof(LINUX_MEMFD_PREFIX) - 1,
1984 LINUX_NAME_MAX - sizeof(LINUX_MEMFD_PREFIX) - 1, NULL);
1986 if (error == ENAMETOOLONG)
1991 memcpy(memfd_name, LINUX_MEMFD_PREFIX, sizeof(LINUX_MEMFD_PREFIX) - 1);
1992 flags = linux_to_bsd_bits(args->flags, mfd_bitmap, 0);
1993 if ((flags & ~(MFD_CLOEXEC | MFD_ALLOW_SEALING | MFD_HUGETLB |
1994 MFD_HUGE_MASK)) != 0)
1996 /* Size specified but no HUGETLB. */
1997 if ((flags & MFD_HUGE_MASK) != 0 && (flags & MFD_HUGETLB) == 0)
1999 /* We don't actually support HUGETLB. */
2000 if ((flags & MFD_HUGETLB) != 0)
2003 shmflags = SHM_GROW_ON_WRITE;
2004 if ((flags & MFD_CLOEXEC) != 0)
2005 oflags |= O_CLOEXEC;
2006 if ((flags & MFD_ALLOW_SEALING) != 0)
2007 shmflags |= SHM_ALLOW_SEALING;
2008 return (kern_shm_open2(td, SHM_ANON, oflags, 0, shmflags, NULL,
2013 linux_splice(struct thread *td, struct linux_splice_args *args)
2016 linux_msg(td, "syscall splice not really implemented");
2019 * splice(2) is documented to return EINVAL in various circumstances;
2020 * returning it instead of ENOSYS should hint the caller to use fallback