2 * SPDX-License-Identifier: BSD-2-Clause
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/param.h>
30 #include <sys/systm.h>
31 #include <sys/dirent.h>
32 #include <sys/fcntl.h>
34 #include <sys/filedesc.h>
37 #include <sys/selinfo.h>
42 #include <sys/syscallsubr.h>
43 #include <sys/sysproto.h>
45 #include <sys/unistd.h>
46 #include <sys/vnode.h>
49 #include <compat/freebsd32/freebsd32_misc.h>
50 #include <compat/freebsd32/freebsd32_util.h>
51 #include <machine/../linux32/linux.h>
52 #include <machine/../linux32/linux32_proto.h>
54 #include <machine/../linux/linux.h>
55 #include <machine/../linux/linux_proto.h>
57 #include <compat/linux/linux_misc.h>
58 #include <compat/linux/linux_util.h>
59 #include <compat/linux/linux_file.h>
61 static int linux_common_open(struct thread *, int, const char *, int, int,
63 static int linux_do_accessat(struct thread *t, int, const char *, int, int);
64 static int linux_getdents_error(struct thread *, int, int);
66 static struct bsd_to_linux_bitmap seal_bitmap[] = {
67 BITMAP_1t1_LINUX(F_SEAL_SEAL),
68 BITMAP_1t1_LINUX(F_SEAL_SHRINK),
69 BITMAP_1t1_LINUX(F_SEAL_GROW),
70 BITMAP_1t1_LINUX(F_SEAL_WRITE),
73 #define MFD_HUGETLB_ENTRY(_size) \
75 .bsd_value = MFD_HUGE_##_size, \
76 .linux_value = LINUX_HUGETLB_FLAG_ENCODE_##_size \
78 static struct bsd_to_linux_bitmap mfd_bitmap[] = {
79 BITMAP_1t1_LINUX(MFD_CLOEXEC),
80 BITMAP_1t1_LINUX(MFD_ALLOW_SEALING),
81 BITMAP_1t1_LINUX(MFD_HUGETLB),
82 MFD_HUGETLB_ENTRY(64KB),
83 MFD_HUGETLB_ENTRY(512KB),
84 MFD_HUGETLB_ENTRY(1MB),
85 MFD_HUGETLB_ENTRY(2MB),
86 MFD_HUGETLB_ENTRY(8MB),
87 MFD_HUGETLB_ENTRY(16MB),
88 MFD_HUGETLB_ENTRY(32MB),
89 MFD_HUGETLB_ENTRY(256MB),
90 MFD_HUGETLB_ENTRY(512MB),
91 MFD_HUGETLB_ENTRY(1GB),
92 MFD_HUGETLB_ENTRY(2GB),
93 MFD_HUGETLB_ENTRY(16GB),
95 #undef MFD_HUGETLB_ENTRY
97 #ifdef LINUX_LEGACY_SYSCALLS
99 linux_creat(struct thread *td, struct linux_creat_args *args)
102 return (kern_openat(td, AT_FDCWD, args->path, UIO_USERSPACE,
103 O_WRONLY | O_CREAT | O_TRUNC, args->mode));
108 linux_common_openflags(int l_flags)
113 switch (l_flags & LINUX_O_ACCMODE) {
115 bsd_flags |= O_WRONLY;
121 bsd_flags |= O_RDONLY;
123 if (l_flags & LINUX_O_NDELAY)
124 bsd_flags |= O_NONBLOCK;
125 if (l_flags & LINUX_O_APPEND)
126 bsd_flags |= O_APPEND;
127 if (l_flags & LINUX_O_SYNC)
128 bsd_flags |= O_FSYNC;
129 if (l_flags & LINUX_O_CLOEXEC)
130 bsd_flags |= O_CLOEXEC;
131 if (l_flags & LINUX_O_NONBLOCK)
132 bsd_flags |= O_NONBLOCK;
133 if (l_flags & LINUX_O_ASYNC)
134 bsd_flags |= O_ASYNC;
135 if (l_flags & LINUX_O_CREAT)
136 bsd_flags |= O_CREAT;
137 if (l_flags & LINUX_O_TRUNC)
138 bsd_flags |= O_TRUNC;
139 if (l_flags & LINUX_O_EXCL)
141 if (l_flags & LINUX_O_NOCTTY)
142 bsd_flags |= O_NOCTTY;
143 if (l_flags & LINUX_O_DIRECT)
144 bsd_flags |= O_DIRECT;
145 if (l_flags & LINUX_O_NOFOLLOW)
146 bsd_flags |= O_NOFOLLOW;
147 if (l_flags & LINUX_O_DIRECTORY)
148 bsd_flags |= O_DIRECTORY;
149 if (l_flags & LINUX_O_PATH)
151 /* XXX LINUX_O_NOATIME: unable to be easily implemented. */
156 linux_common_open(struct thread *td, int dirfd, const char *path, int l_flags,
157 int mode, enum uio_seg seg)
159 struct proc *p = td->td_proc;
162 int bsd_flags, error;
164 bsd_flags = linux_common_openflags(l_flags);
165 error = kern_openat(td, dirfd, path, seg, bsd_flags, mode);
171 if (p->p_flag & P_CONTROLT)
173 if (bsd_flags & O_NOCTTY)
177 * XXX In between kern_openat() and fget(), another process
178 * having the same filedesc could use that fd without
181 fd = td->td_retval[0];
182 if (fget(td, fd, &cap_ioctl_rights, &fp) == 0) {
183 if (fp->f_type != DTYPE_VNODE) {
187 sx_slock(&proctree_lock);
189 if (SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
191 sx_sunlock(&proctree_lock);
192 /* XXXPJD: Verify if TIOCSCTTY is allowed. */
193 (void) fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0,
197 sx_sunlock(&proctree_lock);
207 linux_openat(struct thread *td, struct linux_openat_args *args)
211 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
212 return (linux_common_open(td, dfd, args->filename, args->flags,
213 args->mode, UIO_USERSPACE));
216 #ifdef LINUX_LEGACY_SYSCALLS
218 linux_open(struct thread *td, struct linux_open_args *args)
221 return (linux_common_open(td, AT_FDCWD, args->path, args->flags,
222 args->mode, UIO_USERSPACE));
227 linux_name_to_handle_at(struct thread *td,
228 struct linux_name_to_handle_at_args *args)
230 static const l_int valid_flags = (LINUX_AT_SYMLINK_FOLLOW |
231 LINUX_AT_EMPTY_PATH);
232 static const l_uint fh_size = sizeof(fhandle_t);
237 int error, fd, bsd_flags;
239 if (args->flags & ~valid_flags)
243 if (fd == LINUX_AT_FDCWD)
247 if (!(args->flags & LINUX_AT_SYMLINK_FOLLOW))
248 bsd_flags |= AT_SYMLINK_NOFOLLOW;
249 if ((args->flags & LINUX_AT_EMPTY_PATH) != 0)
250 bsd_flags |= AT_EMPTY_PATH;
252 error = kern_getfhat(td, bsd_flags, fd, args->name,
253 UIO_USERSPACE, &fh, UIO_SYSSPACE);
257 /* Emit mount_id -- required before EOVERFLOW case. */
258 mount_id = (fh.fh_fsid.val[0] ^ fh.fh_fsid.val[1]);
259 error = copyout(&mount_id, args->mnt_id, sizeof(mount_id));
263 /* Check if there is room for handle. */
264 error = copyin(&args->handle->handle_bytes, &fh_bytes,
269 if (fh_bytes < fh_size) {
270 error = copyout(&fh_size, &args->handle->handle_bytes,
280 * We don't use handle_type for anything yet, but initialize a known
283 error = copyout(&mount_id, &args->handle->handle_type,
288 error = copyout(&fh, &args->handle->f_handle,
294 linux_open_by_handle_at(struct thread *td,
295 struct linux_open_by_handle_at_args *args)
298 int bsd_flags, error;
300 error = copyin(&args->handle->handle_bytes, &fh_bytes,
305 if (fh_bytes < sizeof(fhandle_t))
308 bsd_flags = linux_common_openflags(args->flags);
309 return (kern_fhopen(td, (void *)&args->handle->f_handle, bsd_flags));
313 linux_lseek(struct thread *td, struct linux_lseek_args *args)
316 return (kern_lseek(td, args->fdes, args->off, args->whence));
319 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
321 linux_llseek(struct thread *td, struct linux_llseek_args *args)
326 off = (args->olow) | (((off_t) args->ohigh) << 32);
328 error = kern_lseek(td, args->fd, off, args->whence);
332 error = copyout(td->td_retval, args->res, sizeof(off_t));
336 td->td_retval[0] = 0;
339 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
342 * Note that linux_getdents(2) and linux_getdents64(2) have the same
343 * arguments. They only differ in the definition of struct dirent they
345 * Note that linux_readdir(2) is a special case of linux_getdents(2)
346 * where count is always equals 1, meaning that the buffer is one
347 * dirent-structure in size and that the code can't handle more anyway.
348 * Note that linux_readdir(2) can't be implemented by means of linux_getdents(2)
349 * as in case when the *dent buffer size is equal to 1 linux_getdents(2) will
354 linux_getdents_error(struct thread *td, int fd, int err)
360 /* Linux return ENOTDIR in case when fd is not a directory. */
361 error = getvnode(td, fd, &cap_read_rights, &fp);
365 if (vp->v_type != VDIR) {
377 char d_name[LINUX_NAME_MAX + 1];
385 char d_name[LINUX_NAME_MAX + 1];
389 * Linux uses the last byte in the dirent buffer to store d_type,
390 * at least glibc-2.7 requires it. That is why l_dirent is padded with 2 bytes.
392 #define LINUX_RECLEN(namlen) \
393 roundup(offsetof(struct l_dirent, d_name) + (namlen) + 2, sizeof(l_ulong))
395 #define LINUX_RECLEN64(namlen) \
396 roundup(offsetof(struct l_dirent64, d_name) + (namlen) + 1, \
399 #ifdef LINUX_LEGACY_SYSCALLS
401 linux_getdents(struct thread *td, struct linux_getdents_args *args)
404 caddr_t inp, buf; /* BSD-format */
405 int len, reclen; /* BSD-format */
406 caddr_t outp; /* Linux-format */
407 int resid, linuxreclen; /* Linux-format */
408 caddr_t lbuf; /* Linux-format */
410 struct l_dirent *linux_dirent;
414 buflen = min(args->count, MAXBSIZE);
415 buf = malloc(buflen, M_LINUX, M_WAITOK);
417 error = kern_getdirentries(td, args->fd, buf, buflen,
418 &base, NULL, UIO_SYSSPACE);
420 error = linux_getdents_error(td, args->fd, error);
424 lbuf = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_LINUX, M_WAITOK | M_ZERO);
426 len = td->td_retval[0];
428 outp = (caddr_t)args->dent;
433 bdp = (struct dirent *) inp;
434 reclen = bdp->d_reclen;
435 linuxreclen = LINUX_RECLEN(bdp->d_namlen);
437 * No more space in the user supplied dirent buffer.
440 if (resid < linuxreclen) {
445 linux_dirent = (struct l_dirent*)lbuf;
446 linux_dirent->d_ino = bdp->d_fileno;
447 linux_dirent->d_off = bdp->d_off;
448 linux_dirent->d_reclen = linuxreclen;
450 * Copy d_type to last byte of l_dirent buffer
452 lbuf[linuxreclen - 1] = bdp->d_type;
453 strlcpy(linux_dirent->d_name, bdp->d_name,
454 linuxreclen - offsetof(struct l_dirent, d_name)-1);
455 error = copyout(linux_dirent, outp, linuxreclen);
463 retval += linuxreclen;
465 resid -= linuxreclen;
467 td->td_retval[0] = retval;
478 linux_getdents64(struct thread *td, struct linux_getdents64_args *args)
481 caddr_t inp, buf; /* BSD-format */
482 int len, reclen; /* BSD-format */
483 caddr_t outp; /* Linux-format */
484 int resid, linuxreclen; /* Linux-format */
486 struct l_dirent64 *linux_dirent64;
490 buflen = min(args->count, MAXBSIZE);
491 buf = malloc(buflen, M_LINUX, M_WAITOK);
493 error = kern_getdirentries(td, args->fd, buf, buflen,
494 &base, NULL, UIO_SYSSPACE);
496 error = linux_getdents_error(td, args->fd, error);
500 linux_dirent64 = malloc(LINUX_RECLEN64(LINUX_NAME_MAX), M_LINUX,
503 len = td->td_retval[0];
505 outp = (caddr_t)args->dirent;
510 bdp = (struct dirent *) inp;
511 reclen = bdp->d_reclen;
512 linuxreclen = LINUX_RECLEN64(bdp->d_namlen);
514 * No more space in the user supplied dirent buffer.
517 if (resid < linuxreclen) {
522 linux_dirent64->d_ino = bdp->d_fileno;
523 linux_dirent64->d_off = bdp->d_off;
524 linux_dirent64->d_reclen = linuxreclen;
525 linux_dirent64->d_type = bdp->d_type;
526 strlcpy(linux_dirent64->d_name, bdp->d_name,
527 linuxreclen - offsetof(struct l_dirent64, d_name));
528 error = copyout(linux_dirent64, outp, linuxreclen);
536 retval += linuxreclen;
538 resid -= linuxreclen;
540 td->td_retval[0] = retval;
543 free(linux_dirent64, M_LINUX);
549 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
551 linux_readdir(struct thread *td, struct linux_readdir_args *args)
554 caddr_t buf; /* BSD-format */
555 int linuxreclen; /* Linux-format */
557 struct l_dirent *linux_dirent; /* Linux-format */
560 buflen = sizeof(*bdp);
561 buf = malloc(buflen, M_LINUX, M_WAITOK);
563 error = kern_getdirentries(td, args->fd, buf, buflen,
564 &base, NULL, UIO_SYSSPACE);
566 error = linux_getdents_error(td, args->fd, error);
569 if (td->td_retval[0] == 0)
572 linux_dirent = malloc(LINUX_RECLEN(LINUX_NAME_MAX), M_LINUX,
575 bdp = (struct dirent *) buf;
576 linuxreclen = LINUX_RECLEN(bdp->d_namlen);
578 linux_dirent->d_ino = bdp->d_fileno;
579 linux_dirent->d_off = bdp->d_off;
580 linux_dirent->d_reclen = bdp->d_namlen;
581 strlcpy(linux_dirent->d_name, bdp->d_name,
582 linuxreclen - offsetof(struct l_dirent, d_name));
583 error = copyout(linux_dirent, args->dent, linuxreclen);
585 td->td_retval[0] = linuxreclen;
587 free(linux_dirent, M_LINUX);
592 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
595 * These exist mainly for hooks for doing /compat/linux translation.
598 #ifdef LINUX_LEGACY_SYSCALLS
600 linux_access(struct thread *td, struct linux_access_args *args)
603 /* Linux convention. */
604 if (args->amode & ~(F_OK | X_OK | W_OK | R_OK))
607 return (kern_accessat(td, AT_FDCWD, args->path, UIO_USERSPACE, 0,
613 linux_do_accessat(struct thread *td, int ldfd, const char *filename,
614 int amode, int flags)
618 /* Linux convention. */
619 if (amode & ~(F_OK | X_OK | W_OK | R_OK))
622 dfd = (ldfd == LINUX_AT_FDCWD) ? AT_FDCWD : ldfd;
623 return (kern_accessat(td, dfd, filename, UIO_USERSPACE, flags, amode));
627 linux_faccessat(struct thread *td, struct linux_faccessat_args *args)
630 return (linux_do_accessat(td, args->dfd, args->filename, args->amode,
635 linux_faccessat2(struct thread *td, struct linux_faccessat2_args *args)
637 int flags, unsupported;
639 /* XXX. AT_SYMLINK_NOFOLLOW is not supported by kern_accessat */
640 unsupported = args->flags & ~(LINUX_AT_EACCESS | LINUX_AT_EMPTY_PATH);
641 if (unsupported != 0) {
642 linux_msg(td, "faccessat2 unsupported flag 0x%x", unsupported);
646 flags = (args->flags & LINUX_AT_EACCESS) == 0 ? 0 :
648 flags |= (args->flags & LINUX_AT_EMPTY_PATH) == 0 ? 0 :
650 return (linux_do_accessat(td, args->dfd, args->filename, args->amode,
655 #ifdef LINUX_LEGACY_SYSCALLS
657 linux_unlink(struct thread *td, struct linux_unlink_args *args)
662 error = kern_funlinkat(td, AT_FDCWD, args->path, FD_NONE,
663 UIO_USERSPACE, 0, 0);
664 if (error == EPERM) {
665 /* Introduce POSIX noncompliant behaviour of Linux */
666 if (kern_statat(td, 0, AT_FDCWD, args->path,
667 UIO_USERSPACE, &st) == 0) {
668 if (S_ISDIR(st.st_mode))
678 linux_unlinkat_impl(struct thread *td, enum uio_seg pathseg, const char *path,
679 int dfd, struct linux_unlinkat_args *args)
684 if (args->flag & LINUX_AT_REMOVEDIR)
685 error = kern_frmdirat(td, dfd, path, FD_NONE, pathseg, 0);
687 error = kern_funlinkat(td, dfd, path, FD_NONE, pathseg, 0, 0);
688 if (error == EPERM && !(args->flag & LINUX_AT_REMOVEDIR)) {
689 /* Introduce POSIX noncompliant behaviour of Linux */
690 if (kern_statat(td, AT_SYMLINK_NOFOLLOW, dfd, path,
691 pathseg, &st) == 0 && S_ISDIR(st.st_mode))
698 linux_unlinkat(struct thread *td, struct linux_unlinkat_args *args)
702 if (args->flag & ~LINUX_AT_REMOVEDIR)
704 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
705 return (linux_unlinkat_impl(td, UIO_USERSPACE, args->pathname,
710 linux_chdir(struct thread *td, struct linux_chdir_args *args)
713 return (kern_chdir(td, args->path, UIO_USERSPACE));
716 #ifdef LINUX_LEGACY_SYSCALLS
718 linux_chmod(struct thread *td, struct linux_chmod_args *args)
721 return (kern_fchmodat(td, AT_FDCWD, args->path, UIO_USERSPACE,
727 linux_fchmodat(struct thread *td, struct linux_fchmodat_args *args)
731 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
732 return (kern_fchmodat(td, dfd, args->filename, UIO_USERSPACE,
736 #ifdef LINUX_LEGACY_SYSCALLS
738 linux_mkdir(struct thread *td, struct linux_mkdir_args *args)
741 return (kern_mkdirat(td, AT_FDCWD, args->path, UIO_USERSPACE, args->mode));
746 linux_mkdirat(struct thread *td, struct linux_mkdirat_args *args)
750 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
751 return (kern_mkdirat(td, dfd, args->pathname, UIO_USERSPACE, args->mode));
754 #ifdef LINUX_LEGACY_SYSCALLS
756 linux_rmdir(struct thread *td, struct linux_rmdir_args *args)
759 return (kern_frmdirat(td, AT_FDCWD, args->path, FD_NONE,
764 linux_rename(struct thread *td, struct linux_rename_args *args)
767 return (kern_renameat(td, AT_FDCWD, args->from, AT_FDCWD,
768 args->to, UIO_USERSPACE));
773 linux_renameat(struct thread *td, struct linux_renameat_args *args)
775 struct linux_renameat2_args renameat2_args = {
776 .olddfd = args->olddfd,
777 .oldname = args->oldname,
778 .newdfd = args->newdfd,
779 .newname = args->newname,
783 return (linux_renameat2(td, &renameat2_args));
787 linux_renameat2(struct thread *td, struct linux_renameat2_args *args)
791 if (args->flags != 0) {
792 if (args->flags & ~(LINUX_RENAME_EXCHANGE |
793 LINUX_RENAME_NOREPLACE | LINUX_RENAME_WHITEOUT))
795 if (args->flags & LINUX_RENAME_EXCHANGE &&
796 args->flags & (LINUX_RENAME_NOREPLACE |
797 LINUX_RENAME_WHITEOUT))
801 * This spams the console on Ubuntu Focal.
803 * What's needed here is a general mechanism to let users know
804 * about missing features without hogging the system.
806 linux_msg(td, "renameat2 unsupported flags 0x%x",
812 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
813 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
814 return (kern_renameat(td, olddfd, args->oldname, newdfd,
815 args->newname, UIO_USERSPACE));
818 #ifdef LINUX_LEGACY_SYSCALLS
820 linux_symlink(struct thread *td, struct linux_symlink_args *args)
823 return (kern_symlinkat(td, args->path, AT_FDCWD, args->to,
829 linux_symlinkat(struct thread *td, struct linux_symlinkat_args *args)
833 dfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
834 return (kern_symlinkat(td, args->oldname, dfd, args->newname,
838 #ifdef LINUX_LEGACY_SYSCALLS
840 linux_readlink(struct thread *td, struct linux_readlink_args *args)
843 if (args->count <= 0)
846 return (kern_readlinkat(td, AT_FDCWD, args->name, UIO_USERSPACE,
847 args->buf, UIO_USERSPACE, args->count));
852 linux_readlinkat(struct thread *td, struct linux_readlinkat_args *args)
856 if (args->bufsiz <= 0)
859 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
860 return (kern_readlinkat(td, dfd, args->path, UIO_USERSPACE,
861 args->buf, UIO_USERSPACE, args->bufsiz));
865 linux_truncate(struct thread *td, struct linux_truncate_args *args)
868 return (kern_truncate(td, args->path, UIO_USERSPACE, args->length));
871 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
873 linux_truncate64(struct thread *td, struct linux_truncate64_args *args)
877 #if defined(__amd64__) && defined(COMPAT_LINUX32)
878 length = PAIR32TO64(off_t, args->length);
880 length = args->length;
883 return (kern_truncate(td, args->path, UIO_USERSPACE, length));
885 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
888 linux_ftruncate(struct thread *td, struct linux_ftruncate_args *args)
891 return (kern_ftruncate(td, args->fd, args->length));
894 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
896 linux_ftruncate64(struct thread *td, struct linux_ftruncate64_args *args)
900 #if defined(__amd64__) && defined(COMPAT_LINUX32)
901 length = PAIR32TO64(off_t, args->length);
903 length = args->length;
906 return (kern_ftruncate(td, args->fd, length));
910 #ifdef LINUX_LEGACY_SYSCALLS
912 linux_link(struct thread *td, struct linux_link_args *args)
915 return (kern_linkat(td, AT_FDCWD, AT_FDCWD, args->path, args->to,
916 UIO_USERSPACE, AT_SYMLINK_FOLLOW));
921 linux_linkat(struct thread *td, struct linux_linkat_args *args)
923 int olddfd, newdfd, flag;
925 if (args->flag & ~(LINUX_AT_SYMLINK_FOLLOW | LINUX_AT_EMPTY_PATH))
928 flag = (args->flag & LINUX_AT_SYMLINK_FOLLOW) != 0 ? AT_SYMLINK_FOLLOW :
930 flag |= (args->flag & LINUX_AT_EMPTY_PATH) != 0 ? AT_EMPTY_PATH : 0;
932 olddfd = (args->olddfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->olddfd;
933 newdfd = (args->newdfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->newdfd;
934 return (kern_linkat(td, olddfd, newdfd, args->oldname,
935 args->newname, UIO_USERSPACE, flag));
939 linux_fdatasync(struct thread *td, struct linux_fdatasync_args *uap)
942 return (kern_fsync(td, uap->fd, false));
946 linux_sync_file_range(struct thread *td, struct linux_sync_file_range_args *uap)
948 off_t nbytes, offset;
950 #if defined(__amd64__) && defined(COMPAT_LINUX32)
951 nbytes = PAIR32TO64(off_t, uap->nbytes);
952 offset = PAIR32TO64(off_t, uap->offset);
954 nbytes = uap->nbytes;
955 offset = uap->offset;
958 if (offset < 0 || nbytes < 0 ||
959 (uap->flags & ~(LINUX_SYNC_FILE_RANGE_WAIT_BEFORE |
960 LINUX_SYNC_FILE_RANGE_WRITE |
961 LINUX_SYNC_FILE_RANGE_WAIT_AFTER)) != 0) {
965 return (kern_fsync(td, uap->fd, false));
969 linux_pread(struct thread *td, struct linux_pread_args *uap)
975 #if defined(__amd64__) && defined(COMPAT_LINUX32)
976 offset = PAIR32TO64(off_t, uap->offset);
978 offset = uap->offset;
981 error = kern_pread(td, uap->fd, uap->buf, uap->nbyte, offset);
983 /* This seems to violate POSIX but Linux does it. */
984 error = fgetvp(td, uap->fd, &cap_pread_rights, &vp);
987 if (vp->v_type == VDIR)
995 linux_pwrite(struct thread *td, struct linux_pwrite_args *uap)
999 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1000 offset = PAIR32TO64(off_t, uap->offset);
1002 offset = uap->offset;
1005 return (linux_enobufs2eagain(td, uap->fd,
1006 kern_pwrite(td, uap->fd, uap->buf, uap->nbyte, offset)));
1009 #define HALF_LONG_BITS ((sizeof(l_long) * NBBY / 2))
1012 pos_from_hilo(unsigned long high, unsigned long low)
1015 return (((off_t)high << HALF_LONG_BITS) << HALF_LONG_BITS) | low;
1019 linux_preadv(struct thread *td, struct linux_preadv_args *uap)
1026 * According http://man7.org/linux/man-pages/man2/preadv.2.html#NOTES
1027 * pos_l and pos_h, respectively, contain the
1028 * low order and high order 32 bits of offset.
1030 offset = pos_from_hilo(uap->pos_h, uap->pos_l);
1033 #ifdef COMPAT_LINUX32
1034 error = freebsd32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
1036 error = copyinuio(uap->vec, uap->vlen, &auio);
1040 error = kern_preadv(td, uap->fd, auio, offset);
1046 linux_pwritev(struct thread *td, struct linux_pwritev_args *uap)
1053 * According http://man7.org/linux/man-pages/man2/pwritev.2.html#NOTES
1054 * pos_l and pos_h, respectively, contain the
1055 * low order and high order 32 bits of offset.
1057 offset = pos_from_hilo(uap->pos_h, uap->pos_l);
1060 #ifdef COMPAT_LINUX32
1061 error = freebsd32_copyinuio(PTRIN(uap->vec), uap->vlen, &auio);
1063 error = copyinuio(uap->vec, uap->vlen, &auio);
1067 error = kern_pwritev(td, uap->fd, auio, offset);
1069 return (linux_enobufs2eagain(td, uap->fd, error));
1073 linux_mount(struct thread *td, struct linux_mount_args *args)
1075 struct mntarg *ma = NULL;
1076 char *fstypename, *mntonname, *mntfromname, *data;
1079 fstypename = malloc(MNAMELEN, M_TEMP, M_WAITOK);
1080 mntonname = malloc(MNAMELEN, M_TEMP, M_WAITOK);
1081 mntfromname = malloc(MNAMELEN, M_TEMP, M_WAITOK);
1083 error = copyinstr(args->filesystemtype, fstypename, MNAMELEN - 1,
1087 if (args->specialfile != NULL) {
1088 error = copyinstr(args->specialfile, mntfromname, MNAMELEN - 1, NULL);
1092 mntfromname[0] = '\0';
1094 error = copyinstr(args->dir, mntonname, MNAMELEN - 1, NULL);
1098 if (strcmp(fstypename, "ext2") == 0) {
1099 strcpy(fstypename, "ext2fs");
1100 } else if (strcmp(fstypename, "proc") == 0) {
1101 strcpy(fstypename, "linprocfs");
1102 } else if (strcmp(fstypename, "vfat") == 0) {
1103 strcpy(fstypename, "msdosfs");
1104 } else if (strcmp(fstypename, "fuse") == 0 ||
1105 strncmp(fstypename, "fuse.", 5) == 0) {
1106 char *fuse_options, *fuse_option, *fuse_name;
1108 strcpy(mntfromname, "/dev/fuse");
1109 strcpy(fstypename, "fusefs");
1110 data = malloc(MNAMELEN, M_TEMP, M_WAITOK);
1111 error = copyinstr(args->data, data, MNAMELEN - 1, NULL);
1115 fuse_options = data;
1116 while ((fuse_option = strsep(&fuse_options, ",")) != NULL) {
1117 fuse_name = strsep(&fuse_option, "=");
1118 if (fuse_name == NULL || fuse_option == NULL)
1120 ma = mount_arg(ma, fuse_name, fuse_option, -1);
1124 * The FUSE server uses Linux errno values instead of FreeBSD
1125 * ones; add a flag to tell fuse(4) to do errno translation.
1127 ma = mount_arg(ma, "linux_errnos", "1", -1);
1133 * Linux SYNC flag is not included; the closest equivalent
1134 * FreeBSD has is !ASYNC, which is our default.
1136 if (args->rwflag & LINUX_MS_RDONLY)
1137 fsflags |= MNT_RDONLY;
1138 if (args->rwflag & LINUX_MS_NOSUID)
1139 fsflags |= MNT_NOSUID;
1140 if (args->rwflag & LINUX_MS_NOEXEC)
1141 fsflags |= MNT_NOEXEC;
1142 if (args->rwflag & LINUX_MS_REMOUNT)
1143 fsflags |= MNT_UPDATE;
1145 ma = mount_arg(ma, "fstype", fstypename, -1);
1146 ma = mount_arg(ma, "fspath", mntonname, -1);
1147 ma = mount_arg(ma, "from", mntfromname, -1);
1148 error = kernel_mount(ma, fsflags);
1150 free(fstypename, M_TEMP);
1151 free(mntonname, M_TEMP);
1152 free(mntfromname, M_TEMP);
1157 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1159 linux_oldumount(struct thread *td, struct linux_oldumount_args *args)
1162 return (kern_unmount(td, args->path, 0));
1164 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1166 #ifdef LINUX_LEGACY_SYSCALLS
1168 linux_umount(struct thread *td, struct linux_umount_args *args)
1173 if ((args->flags & LINUX_MNT_FORCE) != 0) {
1174 args->flags &= ~LINUX_MNT_FORCE;
1177 if (args->flags != 0) {
1178 linux_msg(td, "unsupported umount2 flags %#x", args->flags);
1182 return (kern_unmount(td, args->path, flags));
1187 * fcntl family of syscalls
1197 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1203 linux_to_bsd_flock(struct l_flock *linux_flock, struct flock *bsd_flock)
1205 switch (linux_flock->l_type) {
1207 bsd_flock->l_type = F_RDLCK;
1210 bsd_flock->l_type = F_WRLCK;
1213 bsd_flock->l_type = F_UNLCK;
1216 bsd_flock->l_type = -1;
1219 bsd_flock->l_whence = linux_flock->l_whence;
1220 bsd_flock->l_start = (off_t)linux_flock->l_start;
1221 bsd_flock->l_len = (off_t)linux_flock->l_len;
1222 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1223 bsd_flock->l_sysid = 0;
1227 bsd_to_linux_flock(struct flock *bsd_flock, struct l_flock *linux_flock)
1229 switch (bsd_flock->l_type) {
1231 linux_flock->l_type = LINUX_F_RDLCK;
1234 linux_flock->l_type = LINUX_F_WRLCK;
1237 linux_flock->l_type = LINUX_F_UNLCK;
1240 linux_flock->l_whence = bsd_flock->l_whence;
1241 linux_flock->l_start = (l_off_t)bsd_flock->l_start;
1242 linux_flock->l_len = (l_off_t)bsd_flock->l_len;
1243 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1246 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1254 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1260 linux_to_bsd_flock64(struct l_flock64 *linux_flock, struct flock *bsd_flock)
1262 switch (linux_flock->l_type) {
1264 bsd_flock->l_type = F_RDLCK;
1267 bsd_flock->l_type = F_WRLCK;
1270 bsd_flock->l_type = F_UNLCK;
1273 bsd_flock->l_type = -1;
1276 bsd_flock->l_whence = linux_flock->l_whence;
1277 bsd_flock->l_start = (off_t)linux_flock->l_start;
1278 bsd_flock->l_len = (off_t)linux_flock->l_len;
1279 bsd_flock->l_pid = (pid_t)linux_flock->l_pid;
1280 bsd_flock->l_sysid = 0;
1284 bsd_to_linux_flock64(struct flock *bsd_flock, struct l_flock64 *linux_flock)
1286 switch (bsd_flock->l_type) {
1288 linux_flock->l_type = LINUX_F_RDLCK;
1291 linux_flock->l_type = LINUX_F_WRLCK;
1294 linux_flock->l_type = LINUX_F_UNLCK;
1297 linux_flock->l_whence = bsd_flock->l_whence;
1298 linux_flock->l_start = (l_loff_t)bsd_flock->l_start;
1299 linux_flock->l_len = (l_loff_t)bsd_flock->l_len;
1300 linux_flock->l_pid = (l_pid_t)bsd_flock->l_pid;
1302 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1305 fcntl_common(struct thread *td, struct linux_fcntl_args *args)
1307 struct l_flock linux_flock;
1308 struct flock bsd_flock;
1314 switch (args->cmd) {
1316 return (kern_fcntl(td, args->fd, F_DUPFD, args->arg));
1319 return (kern_fcntl(td, args->fd, F_GETFD, 0));
1322 return (kern_fcntl(td, args->fd, F_SETFD, args->arg));
1325 error = kern_fcntl(td, args->fd, F_GETFL, 0);
1326 result = td->td_retval[0];
1327 td->td_retval[0] = 0;
1328 if (result & O_RDONLY)
1329 td->td_retval[0] |= LINUX_O_RDONLY;
1330 if (result & O_WRONLY)
1331 td->td_retval[0] |= LINUX_O_WRONLY;
1332 if (result & O_RDWR)
1333 td->td_retval[0] |= LINUX_O_RDWR;
1334 if (result & O_NDELAY)
1335 td->td_retval[0] |= LINUX_O_NONBLOCK;
1336 if (result & O_APPEND)
1337 td->td_retval[0] |= LINUX_O_APPEND;
1338 if (result & O_FSYNC)
1339 td->td_retval[0] |= LINUX_O_SYNC;
1340 if (result & O_ASYNC)
1341 td->td_retval[0] |= LINUX_O_ASYNC;
1342 #ifdef LINUX_O_NOFOLLOW
1343 if (result & O_NOFOLLOW)
1344 td->td_retval[0] |= LINUX_O_NOFOLLOW;
1346 #ifdef LINUX_O_DIRECT
1347 if (result & O_DIRECT)
1348 td->td_retval[0] |= LINUX_O_DIRECT;
1354 if (args->arg & LINUX_O_NDELAY)
1356 if (args->arg & LINUX_O_APPEND)
1358 if (args->arg & LINUX_O_SYNC)
1360 if (args->arg & LINUX_O_ASYNC)
1362 #ifdef LINUX_O_NOFOLLOW
1363 if (args->arg & LINUX_O_NOFOLLOW)
1366 #ifdef LINUX_O_DIRECT
1367 if (args->arg & LINUX_O_DIRECT)
1370 return (kern_fcntl(td, args->fd, F_SETFL, arg));
1373 error = copyin((void *)args->arg, &linux_flock,
1374 sizeof(linux_flock));
1377 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1378 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1381 bsd_to_linux_flock(&bsd_flock, &linux_flock);
1382 return (copyout(&linux_flock, (void *)args->arg,
1383 sizeof(linux_flock)));
1386 error = copyin((void *)args->arg, &linux_flock,
1387 sizeof(linux_flock));
1390 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1391 return (kern_fcntl(td, args->fd, F_SETLK,
1392 (intptr_t)&bsd_flock));
1394 case LINUX_F_SETLKW:
1395 error = copyin((void *)args->arg, &linux_flock,
1396 sizeof(linux_flock));
1399 linux_to_bsd_flock(&linux_flock, &bsd_flock);
1400 return (kern_fcntl(td, args->fd, F_SETLKW,
1401 (intptr_t)&bsd_flock));
1403 case LINUX_F_GETOWN:
1404 return (kern_fcntl(td, args->fd, F_GETOWN, 0));
1406 case LINUX_F_SETOWN:
1408 * XXX some Linux applications depend on F_SETOWN having no
1409 * significant effect for pipes (SIGIO is not delivered for
1410 * pipes under Linux-2.2.35 at least).
1412 error = fget(td, args->fd,
1413 &cap_fcntl_rights, &fp);
1416 if (fp->f_type == DTYPE_PIPE) {
1422 return (kern_fcntl(td, args->fd, F_SETOWN, args->arg));
1424 case LINUX_F_DUPFD_CLOEXEC:
1425 return (kern_fcntl(td, args->fd, F_DUPFD_CLOEXEC, args->arg));
1427 * Our F_SEAL_* values match Linux one for maximum compatibility. So we
1428 * only needed to account for different values for fcntl(2) commands.
1430 case LINUX_F_GET_SEALS:
1431 error = kern_fcntl(td, args->fd, F_GET_SEALS, 0);
1434 td->td_retval[0] = bsd_to_linux_bits(td->td_retval[0],
1438 case LINUX_F_ADD_SEALS:
1439 return (kern_fcntl(td, args->fd, F_ADD_SEALS,
1440 linux_to_bsd_bits(args->arg, seal_bitmap, 0)));
1442 case LINUX_F_GETPIPE_SZ:
1443 error = fget(td, args->fd,
1444 &cap_fcntl_rights, &fp);
1447 if (fp->f_type != DTYPE_PIPE) {
1452 td->td_retval[0] = fpipe->pipe_buffer.size;
1457 linux_msg(td, "unsupported fcntl cmd %d", args->cmd);
1463 linux_fcntl(struct thread *td, struct linux_fcntl_args *args)
1466 return (fcntl_common(td, args));
1469 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1471 linux_fcntl64(struct thread *td, struct linux_fcntl64_args *args)
1473 struct l_flock64 linux_flock;
1474 struct flock bsd_flock;
1475 struct linux_fcntl_args fcntl_args;
1478 switch (args->cmd) {
1479 case LINUX_F_GETLK64:
1480 error = copyin((void *)args->arg, &linux_flock,
1481 sizeof(linux_flock));
1484 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1485 error = kern_fcntl(td, args->fd, F_GETLK, (intptr_t)&bsd_flock);
1488 bsd_to_linux_flock64(&bsd_flock, &linux_flock);
1489 return (copyout(&linux_flock, (void *)args->arg,
1490 sizeof(linux_flock)));
1492 case LINUX_F_SETLK64:
1493 error = copyin((void *)args->arg, &linux_flock,
1494 sizeof(linux_flock));
1497 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1498 return (kern_fcntl(td, args->fd, F_SETLK,
1499 (intptr_t)&bsd_flock));
1501 case LINUX_F_SETLKW64:
1502 error = copyin((void *)args->arg, &linux_flock,
1503 sizeof(linux_flock));
1506 linux_to_bsd_flock64(&linux_flock, &bsd_flock);
1507 return (kern_fcntl(td, args->fd, F_SETLKW,
1508 (intptr_t)&bsd_flock));
1511 fcntl_args.fd = args->fd;
1512 fcntl_args.cmd = args->cmd;
1513 fcntl_args.arg = args->arg;
1514 return (fcntl_common(td, &fcntl_args));
1516 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1518 #ifdef LINUX_LEGACY_SYSCALLS
1520 linux_chown(struct thread *td, struct linux_chown_args *args)
1523 return (kern_fchownat(td, AT_FDCWD, args->path, UIO_USERSPACE,
1524 args->uid, args->gid, 0));
1529 linux_fchownat(struct thread *td, struct linux_fchownat_args *args)
1531 int dfd, flag, unsupported;
1533 unsupported = args->flag & ~(LINUX_AT_SYMLINK_NOFOLLOW | LINUX_AT_EMPTY_PATH);
1534 if (unsupported != 0) {
1535 linux_msg(td, "fchownat unsupported flag 0x%x", unsupported);
1539 flag = (args->flag & LINUX_AT_SYMLINK_NOFOLLOW) == 0 ? 0 :
1540 AT_SYMLINK_NOFOLLOW;
1541 flag |= (args->flag & LINUX_AT_EMPTY_PATH) == 0 ? 0 :
1544 dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
1545 return (kern_fchownat(td, dfd, args->filename, UIO_USERSPACE,
1546 args->uid, args->gid, flag));
1549 #ifdef LINUX_LEGACY_SYSCALLS
1551 linux_lchown(struct thread *td, struct linux_lchown_args *args)
1554 return (kern_fchownat(td, AT_FDCWD, args->path, UIO_USERSPACE, args->uid,
1555 args->gid, AT_SYMLINK_NOFOLLOW));
1560 convert_fadvice(int advice)
1563 case LINUX_POSIX_FADV_NORMAL:
1564 return (POSIX_FADV_NORMAL);
1565 case LINUX_POSIX_FADV_RANDOM:
1566 return (POSIX_FADV_RANDOM);
1567 case LINUX_POSIX_FADV_SEQUENTIAL:
1568 return (POSIX_FADV_SEQUENTIAL);
1569 case LINUX_POSIX_FADV_WILLNEED:
1570 return (POSIX_FADV_WILLNEED);
1571 case LINUX_POSIX_FADV_DONTNEED:
1572 return (POSIX_FADV_DONTNEED);
1573 case LINUX_POSIX_FADV_NOREUSE:
1574 return (POSIX_FADV_NOREUSE);
1581 linux_fadvise64(struct thread *td, struct linux_fadvise64_args *args)
1586 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1587 offset = PAIR32TO64(off_t, args->offset);
1589 offset = args->offset;
1592 advice = convert_fadvice(args->advice);
1595 return (kern_posix_fadvise(td, args->fd, offset, args->len, advice));
1598 #if defined(__i386__) || (defined(__amd64__) && defined(COMPAT_LINUX32))
1600 linux_fadvise64_64(struct thread *td, struct linux_fadvise64_64_args *args)
1605 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1606 len = PAIR32TO64(off_t, args->len);
1607 offset = PAIR32TO64(off_t, args->offset);
1610 offset = args->offset;
1613 advice = convert_fadvice(args->advice);
1616 return (kern_posix_fadvise(td, args->fd, offset, len, advice));
1618 #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
1620 #ifdef LINUX_LEGACY_SYSCALLS
1622 linux_pipe(struct thread *td, struct linux_pipe_args *args)
1627 error = kern_pipe(td, fildes, 0, NULL, NULL);
1631 error = copyout(fildes, args->pipefds, sizeof(fildes));
1633 (void)kern_close(td, fildes[0]);
1634 (void)kern_close(td, fildes[1]);
1642 linux_pipe2(struct thread *td, struct linux_pipe2_args *args)
1647 if ((args->flags & ~(LINUX_O_NONBLOCK | LINUX_O_CLOEXEC)) != 0)
1651 if ((args->flags & LINUX_O_NONBLOCK) != 0)
1652 flags |= O_NONBLOCK;
1653 if ((args->flags & LINUX_O_CLOEXEC) != 0)
1655 error = kern_pipe(td, fildes, flags, NULL, NULL);
1659 error = copyout(fildes, args->pipefds, sizeof(fildes));
1661 (void)kern_close(td, fildes[0]);
1662 (void)kern_close(td, fildes[1]);
1669 linux_dup3(struct thread *td, struct linux_dup3_args *args)
1674 if (args->oldfd == args->newfd)
1676 if ((args->flags & ~LINUX_O_CLOEXEC) != 0)
1678 if (args->flags & LINUX_O_CLOEXEC)
1679 cmd = F_DUP2FD_CLOEXEC;
1683 newfd = args->newfd;
1684 return (kern_fcntl(td, args->oldfd, cmd, newfd));
1688 linux_fallocate(struct thread *td, struct linux_fallocate_args *args)
1693 * We emulate only posix_fallocate system call for which
1696 if (args->mode != 0)
1697 return (EOPNOTSUPP);
1699 #if defined(__amd64__) && defined(COMPAT_LINUX32)
1700 len = PAIR32TO64(off_t, args->len);
1701 offset = PAIR32TO64(off_t, args->offset);
1704 offset = args->offset;
1707 return (kern_posix_fallocate(td, args->fd, offset, len));
1711 linux_copy_file_range(struct thread *td, struct linux_copy_file_range_args
1714 l_loff_t inoff, outoff, *inoffp, *outoffp;
1718 * copy_file_range(2) on Linux doesn't define any flags (yet), so is
1719 * the native implementation. Enforce it.
1721 if (args->flags != 0) {
1722 linux_msg(td, "copy_file_range unsupported flags 0x%x",
1727 inoffp = outoffp = NULL;
1728 if (args->off_in != NULL) {
1729 error = copyin(args->off_in, &inoff, sizeof(l_loff_t));
1734 if (args->off_out != NULL) {
1735 error = copyin(args->off_out, &outoff, sizeof(l_loff_t));
1741 error = kern_copy_file_range(td, args->fd_in, inoffp, args->fd_out,
1742 outoffp, args->len, flags);
1743 if (error == 0 && args->off_in != NULL)
1744 error = copyout(inoffp, args->off_in, sizeof(l_loff_t));
1745 if (error == 0 && args->off_out != NULL)
1746 error = copyout(outoffp, args->off_out, sizeof(l_loff_t));
1750 #define LINUX_MEMFD_PREFIX "memfd:"
1753 linux_memfd_create(struct thread *td, struct linux_memfd_create_args *args)
1755 char memfd_name[LINUX_NAME_MAX + 1];
1756 int error, flags, shmflags, oflags;
1759 * This is our clever trick to avoid the heap allocation to copy in the
1760 * uname. We don't really need to go this far out of our way, but it
1761 * does keep the rest of this function fairly clean as they don't have
1762 * to worry about cleanup on the way out.
1764 error = copyinstr(args->uname_ptr,
1765 memfd_name + sizeof(LINUX_MEMFD_PREFIX) - 1,
1766 LINUX_NAME_MAX - sizeof(LINUX_MEMFD_PREFIX) - 1, NULL);
1768 if (error == ENAMETOOLONG)
1773 memcpy(memfd_name, LINUX_MEMFD_PREFIX, sizeof(LINUX_MEMFD_PREFIX) - 1);
1774 flags = linux_to_bsd_bits(args->flags, mfd_bitmap, 0);
1775 if ((flags & ~(MFD_CLOEXEC | MFD_ALLOW_SEALING | MFD_HUGETLB |
1776 MFD_HUGE_MASK)) != 0)
1778 /* Size specified but no HUGETLB. */
1779 if ((flags & MFD_HUGE_MASK) != 0 && (flags & MFD_HUGETLB) == 0)
1781 /* We don't actually support HUGETLB. */
1782 if ((flags & MFD_HUGETLB) != 0)
1785 shmflags = SHM_GROW_ON_WRITE;
1786 if ((flags & MFD_CLOEXEC) != 0)
1787 oflags |= O_CLOEXEC;
1788 if ((flags & MFD_ALLOW_SEALING) != 0)
1789 shmflags |= SHM_ALLOW_SEALING;
1790 return (kern_shm_open2(td, SHM_ANON, oflags, 0, shmflags, NULL,
1795 linux_splice(struct thread *td, struct linux_splice_args *args)
1798 linux_msg(td, "syscall splice not really implemented");
1801 * splice(2) is documented to return EINVAL in various circumstances;
1802 * returning it instead of ENOSYS should hint the caller to use fallback
1809 linux_close_range(struct thread *td, struct linux_close_range_args *args)
1814 * Implementing close_range(CLOSE_RANGE_UNSHARE) allows Linux to
1815 * unshare filedesc table of the calling thread from others threads
1816 * in a thread group (i.e., process in the FreeBSD) or others processes,
1817 * which shares the same table, before closing the files. FreeBSD does
1818 * not have compatible unsharing mechanism due to the fact that sharing
1819 * process resources, including filedesc table, is at thread level in the
1820 * Linux, while in the FreeBSD it is at the process level.
1821 * Return EINVAL for now if the CLOSE_RANGE_UNSHARE flag is specified
1822 * until this new Linux API stabilizes.
1825 if ((args->flags & ~(LINUX_CLOSE_RANGE_CLOEXEC)) != 0)
1827 if (args->first > args->last)
1829 if ((args->flags & LINUX_CLOSE_RANGE_CLOEXEC) != 0)
1830 flags |= CLOSE_RANGE_CLOEXEC;
1831 return (kern_close_range(td, flags, args->first, args->last));
1835 linux_enobufs2eagain(struct thread *td, int fd, int error)
1839 if (error != ENOBUFS)
1841 if (fget(td, fd, &cap_no_rights, &fp) != 0)
1843 if (fp->f_type == DTYPE_SOCKET && (fp->f_flag & FNONBLOCK) != 0)
1850 linux_write(struct thread *td, struct linux_write_args *args)
1852 struct write_args bargs = {
1855 .nbyte = args->nbyte,
1858 return (linux_enobufs2eagain(td, args->fd, sys_write(td, &bargs)));
1862 linux_writev(struct thread *td, struct linux_writev_args *args)
1867 #ifdef COMPAT_LINUX32
1868 error = freebsd32_copyinuio(PTRIN(args->iovp), args->iovcnt, &auio);
1870 error = copyinuio(args->iovp, args->iovcnt, &auio);
1874 error = kern_writev(td, args->fd, auio);
1876 return (linux_enobufs2eagain(td, args->fd, error));