/* * Copyright (C) 2017-2021 THL A29 Limited, a Tencent company. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef _FSTACK_EVENT_H #define _FSTACK_EVENT_H #ifdef __cplusplus extern "C" { #endif #ifndef _KERNEL #include #include #define EVFILT_READ (-1) #define EVFILT_WRITE (-2) #define EVFILT_AIO (-3) /* attached to aio requests */ #define EVFILT_VNODE (-4) /* attached to vnodes */ #define EVFILT_PROC (-5) /* attached to struct proc */ #define EVFILT_SIGNAL (-6) /* attached to struct proc */ #define EVFILT_TIMER (-7) /* timers */ #define EVFILT_PROCDESC (-8) /* attached to process descriptors */ #define EVFILT_FS (-9) /* filesystem events */ #define EVFILT_LIO (-10) /* attached to lio requests */ #define EVFILT_USER (-11) /* User events */ #define EVFILT_SENDFILE (-12) /* attached to sendfile requests */ #define EVFILT_EMPTY (-13) /* empty send socket buf */ #define EVFILT_SYSCOUNT 13 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L #define EV_SET(kevp_, a, b, c, d, e, f) do { \ *(kevp_) = (struct kevent){ \ .ident = (a), \ .filter = (b), \ .flags = (c), \ .fflags = (d), \ .data = (e), \ .udata = (f), \ .ext = {0}, \ }; \ } while(0) #else /* Pre-C99 or not STDC (e.g., C++) */ /* The definition of the local variable kevp could possibly conflict * with a user-defined value passed in parameters a-f. */ #define EV_SET(kevp_, a, b, c, d, e, f) do { \ struct kevent *kevp = (kevp_); \ (kevp)->ident = (a); \ (kevp)->filter = (b); \ (kevp)->flags = (c); \ (kevp)->fflags = (d); \ (kevp)->data = (e); \ (kevp)->udata = (f); \ (kevp)->ext[0] = 0; \ (kevp)->ext[1] = 0; \ (kevp)->ext[2] = 0; \ (kevp)->ext[3] = 0; \ } while(0) #endif struct kevent { uintptr_t ident; /* identifier for this event */ short filter; /* filter for event */ unsigned short flags; /* action flags for kqueue */ unsigned int fflags; /* filter flag value */ __int64_t data; /* filter data value */ void *udata; /* opaque user data identifier */ __uint64_t ext[4]; /* extensions */ }; #if defined(_WANT_FREEBSD11_KEVENT) /* Older structure used in FreeBSD 11.x and older. */ struct kevent_freebsd11 { uintptr_t ident; /* identifier for this event */ short filter; /* filter for event */ unsigned short flags; unsigned int fflags; __intptr_t data; void *udata; /* opaque user data identifier */ }; #endif #if defined(_WANT_KEVENT32) || (defined(_KERNEL) && defined(__LP64__)) struct kevent32 { uint32_t ident; /* identifier for this event */ short filter; /* filter for event */ u_short flags; u_int fflags; #ifndef __amd64__ uint32_t pad0; #endif uint32_t data1, data2; uint32_t udata; /* opaque user data identifier */ #ifndef __amd64__ uint32_t pad1; #endif uint32_t ext64[8]; }; #ifdef _WANT_FREEBSD11_KEVENT struct kevent32_freebsd11 { u_int32_t ident; /* identifier for this event */ short filter; /* filter for event */ u_short flags; u_int fflags; int32_t data; u_int32_t udata; /* opaque user data identifier */ }; #endif #endif /* actions */ #define EV_ADD 0x0001 /* add event to kq (implies enable) */ #define EV_DELETE 0x0002 /* delete event from kq */ #define EV_ENABLE 0x0004 /* enable event */ #define EV_DISABLE 0x0008 /* disable event (not reported) */ #define EV_FORCEONESHOT 0x0100 /* enable _ONESHOT and force trigger */ /* flags */ #define EV_ONESHOT 0x0010 /* only report one occurrence */ #define EV_CLEAR 0x0020 /* clear event state after reporting */ #define EV_RECEIPT 0x0040 /* force EV_ERROR on success, data=0 */ #define EV_DISPATCH 0x0080 /* disable event after reporting */ #define EV_SYSFLAGS 0xF000 /* reserved by system */ #define EV_DROP 0x1000 /* note should be dropped */ #define EV_FLAG1 0x2000 /* filter-specific flag */ #define EV_FLAG2 0x4000 /* filter-specific flag */ /* returned values */ #define EV_EOF 0x8000 /* EOF detected */ #define EV_ERROR 0x4000 /* error, data contains errno */ /* * data/hint flags/masks for EVFILT_USER, shared with userspace * * On input, the top two bits of fflags specifies how the lower twenty four * bits should be applied to the stored value of fflags. * * On output, the top two bits will always be set to NOTE_FFNOP and the * remaining twenty four bits will contain the stored fflags value. */ #define NOTE_FFNOP 0x00000000 /* ignore input fflags */ #define NOTE_FFAND 0x40000000 /* AND fflags */ #define NOTE_FFOR 0x80000000 /* OR fflags */ #define NOTE_FFCOPY 0xc0000000 /* copy fflags */ #define NOTE_FFCTRLMASK 0xc0000000 /* masks for operations */ #define NOTE_FFLAGSMASK 0x00ffffff #define NOTE_TRIGGER 0x01000000 /* Cause the event to be triggered for output. */ /* * data/hint flags for EVFILT_{READ|WRITE}, shared with userspace */ #define NOTE_LOWAT 0x0001 /* low water mark */ #define NOTE_FILE_POLL 0x0002 /* behave like poll() */ /* * data/hint flags for EVFILT_VNODE, shared with userspace */ #define NOTE_DELETE 0x0001 /* vnode was removed */ #define NOTE_WRITE 0x0002 /* data contents changed */ #define NOTE_EXTEND 0x0004 /* size increased */ #define NOTE_ATTRIB 0x0008 /* attributes changed */ #define NOTE_LINK 0x0010 /* link count changed */ #define NOTE_RENAME 0x0020 /* vnode was renamed */ #define NOTE_REVOKE 0x0040 /* vnode access was revoked */ #define NOTE_OPEN 0x0080 /* vnode was opened */ #define NOTE_CLOSE 0x0100 /* file closed, fd did not allowed write */ #define NOTE_CLOSE_WRITE 0x0200 /* file closed, fd did allowed write */ #define NOTE_READ 0x0400 /* file was read */ /* * data/hint flags for EVFILT_PROC and EVFILT_PROCDESC, shared with userspace */ #define NOTE_EXIT 0x80000000 /* process exited */ #define NOTE_FORK 0x40000000 /* process forked */ #define NOTE_EXEC 0x20000000 /* process exec'd */ #define NOTE_PCTRLMASK 0xf0000000 /* mask for hint bits */ #define NOTE_PDATAMASK 0x000fffff /* mask for pid */ /* additional flags for EVFILT_PROC */ #define NOTE_TRACK 0x00000001 /* follow across forks */ #define NOTE_TRACKERR 0x00000002 /* could not track child */ #define NOTE_CHILD 0x00000004 /* am a child process */ /* additional flags for EVFILT_TIMER */ #define NOTE_SECONDS 0x00000001 /* data is seconds */ #define NOTE_MSECONDS 0x00000002 /* data is milliseconds */ #define NOTE_USECONDS 0x00000004 /* data is microseconds */ #define NOTE_NSECONDS 0x00000008 /* data is nanoseconds */ #define NOTE_ABSTIME 0x00000010 /* timeout is absolute */ struct knote; SLIST_HEAD(klist, knote); struct kqueue; TAILQ_HEAD(kqlist, kqueue); struct knlist { struct klist kl_list; void (*kl_lock)(void *); /* lock function */ void (*kl_unlock)(void *); void (*kl_assert_lock)(void *, int); void *kl_lockarg; /* argument passed to lock functions */ int kl_autodestroy; }; #endif #ifdef __cplusplus } #endif #endif