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https://github.com/freebsd/freebsd-src.git
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Konstantin Belousov
03ca6dbdb8
The driver implements the ntsync interface as specified in the Linux 7.0-rc3 document Documentation/userspace-api/ntsync.rst. Only the documentation and the userspace tests (Linux' tools/testing/selftests/drivers/ntsync/ntsync.c) were used for reference. When the documentation contradicted the tests, tests behavior was implemented. One quirk is that Linux API needs to return an error from ioctl() and to copyout the modified ioctl() argument. Our generic ioctl() is not flexible enough to implement this, so the ntsync_ioctl_copyout() hack allows to copyout the ioctl parameter directly from the ioctl method, instead of relying on the ioctl infra. The FreeBSD port of the tests, that can be compiled both on FreeBSD and Linux, is available at https://github.com/kostikbel/freebsd-ntsync-test. The Linux binary compiled with the Linux test harness, cannot be run under linuxolator due to unimplemented syscalls, but the shims in freebsd-ntsync-test can be compiled on Linux and resulting Linux/glibc binary run on linuxolator to test linux compat. Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D57038
67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright 2026 The FreeBSD Foundation
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*
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* This software was developed by Konstantin Belousov <[email protected]>
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* under sponsorship from the FreeBSD Foundation.
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*/
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#ifndef __DEV_NTSYNC_H__
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#define __DEV_NTSYNC_H__
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#include <sys/types.h>
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#include <sys/ioccom.h>
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struct ntsync_sem_args {
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uint32_t count;
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uint32_t max;
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};
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struct ntsync_mutex_args {
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uint32_t owner;
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uint32_t count;
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};
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struct ntsync_event_args {
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uint32_t manual;
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uint32_t signaled;
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};
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struct ntsync_wait_args {
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uint64_t timeout;
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uint64_t objs;
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uint32_t count;
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uint32_t index;
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uint32_t flags;
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uint32_t owner;
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uint32_t alert;
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uint32_t pad;
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};
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#define NTSYNC_WAIT_REALTIME 0x00000001
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#define NTSYNC_MAX_WAIT_COUNT 64
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/*
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* 'sp' means that the ioctl is special, it might return both error
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* and copy out parameters. See ntsync_ioctl_copyout().
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*/
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#define NTSYNC_IOC_CREATE_SEM _IOW('n', 1, struct ntsync_sem_args)
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#define NTSYNC_IOC_CREATE_MUTEX _IOW('n', 2, struct ntsync_mutex_args)
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#define NTSYNC_IOC_CREATE_EVENT _IOW('n', 3, struct ntsync_event_args)
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#define NTSYNC_IOC_SEM_RELEASE _IOWR('n', 4, uint32_t)
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#define NTSYNC_IOC_MUTEX_UNLOCK _IOWR('n', 5, struct ntsync_mutex_args)
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#define NTSYNC_IOC_EVENT_SET _IOR('n', 6, uint32_t)
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#define NTSYNC_IOC_EVENT_RESET _IOR('n', 7, uint32_t)
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#define NTSYNC_IOC_EVENT_PULSE _IOR('n', 8, uint32_t)
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#define NTSYNC_IOC_SEM_READ _IOR('n', 9, struct ntsync_sem_args)
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#define NTSYNC_IOC_MUTEX_READ _IO('n', 10) /* sp */
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#define NTSYNC_IOC_EVENT_READ _IOR('n', 11, struct ntsync_event_args)
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#define NTSYNC_IOC_MUTEX_KILL _IOW('n', 12, uint32_t)
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#define NTSYNC_IOC_WAIT_ANY _IOW('n', 13, struct ntsync_wait_args) /* sp */
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#define NTSYNC_IOC_WAIT_ALL _IOW('n', 14, struct ntsync_wait_args) /* sp */
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#endif
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