6c8f7fc3ba
. add all sys/sys headers not already present to help compiling . take netbsd dirent.h and struct dirent; main result is introducing d_type and d_namlen that have to be set by getdents() in all FS code implementing it . d_off is gone . alignment of the struct has become 8 bytes instead of 4 . remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE . libminlib: cleanup unused yet duplicate code . mfs: throw out the long-broken v1, v2 support . new test for dirent contents filled by getdents() Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
260 lines
8.1 KiB
C
260 lines
8.1 KiB
C
/* $NetBSD: event.h,v 1.23 2011/06/26 16:43:12 christos Exp $ */
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/*-
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* Copyright (c) 1999,2000,2001 Jonathan Lemon <jlemon@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: src/sys/sys/event.h,v 1.12 2001/02/24 01:44:03 jlemon Exp $
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*/
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#ifndef _SYS_EVENT_H_
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#define _SYS_EVENT_H_
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#include <sys/featuretest.h>
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#include <sys/types.h> /* for size_t */
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#include <sys/inttypes.h> /* for uintptr_t */
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#include <sys/null.h> /* for NULL */
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#define EVFILT_READ 0
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#define EVFILT_WRITE 1
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#define EVFILT_AIO 2 /* attached to aio requests */
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#define EVFILT_VNODE 3 /* attached to vnodes */
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#define EVFILT_PROC 4 /* attached to struct proc */
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#define EVFILT_SIGNAL 5 /* attached to struct proc */
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#define EVFILT_TIMER 6 /* arbitrary timer (in ms) */
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#define EVFILT_SYSCOUNT 7 /* number of filters */
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#define EV_SET(kevp, a, b, c, d, e, f) \
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do { \
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(kevp)->ident = (a); \
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(kevp)->filter = (b); \
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(kevp)->flags = (c); \
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(kevp)->fflags = (d); \
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(kevp)->data = (e); \
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(kevp)->udata = (f); \
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} while (/* CONSTCOND */ 0)
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struct kevent {
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uintptr_t ident; /* identifier for this event */
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uint32_t filter; /* filter for event */
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uint32_t flags; /* action flags for kqueue */
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uint32_t fflags; /* filter flag value */
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int64_t data; /* filter data value */
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intptr_t udata; /* opaque user data identifier */
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};
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/* actions */
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#define EV_ADD 0x0001 /* add event to kq (implies ENABLE) */
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#define EV_DELETE 0x0002 /* delete event from kq */
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#define EV_ENABLE 0x0004 /* enable event */
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#define EV_DISABLE 0x0008 /* disable event (not reported) */
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/* flags */
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#define EV_ONESHOT 0x0010 /* only report one occurrence */
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#define EV_CLEAR 0x0020 /* clear event state after reporting */
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#define EV_SYSFLAGS 0xF000 /* reserved by system */
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#define EV_FLAG1 0x2000 /* filter-specific flag */
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/* returned values */
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#define EV_EOF 0x8000 /* EOF detected */
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#define EV_ERROR 0x4000 /* error, data contains errno */
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/*
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* hint flag for in-kernel use - must not equal any existing note
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*/
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#ifdef _KERNEL
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#define NOTE_SUBMIT 0x01000000 /* initial knote submission */
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#endif
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/*
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* data/hint flags for EVFILT_{READ|WRITE}, shared with userspace
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*/
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#define NOTE_LOWAT 0x0001 /* low water mark */
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/*
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* data/hint flags for EVFILT_VNODE, shared with userspace
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*/
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#define NOTE_DELETE 0x0001 /* vnode was removed */
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#define NOTE_WRITE 0x0002 /* data contents changed */
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#define NOTE_EXTEND 0x0004 /* size increased */
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#define NOTE_ATTRIB 0x0008 /* attributes changed */
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#define NOTE_LINK 0x0010 /* link count changed */
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#define NOTE_RENAME 0x0020 /* vnode was renamed */
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#define NOTE_REVOKE 0x0040 /* vnode access was revoked */
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/*
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* data/hint flags for EVFILT_PROC, shared with userspace
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*/
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#define NOTE_EXIT 0x80000000 /* process exited */
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#define NOTE_FORK 0x40000000 /* process forked */
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#define NOTE_EXEC 0x20000000 /* process exec'd */
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#define NOTE_PCTRLMASK 0xf0000000 /* mask for hint bits */
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#define NOTE_PDATAMASK 0x000fffff /* mask for pid */
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/* additional flags for EVFILT_PROC */
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#define NOTE_TRACK 0x00000001 /* follow across forks */
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#define NOTE_TRACKERR 0x00000002 /* could not track child */
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#define NOTE_CHILD 0x00000004 /* am a child process */
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/*
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* This is currently visible to userland to work around broken
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* programs which pull in <sys/proc.h> or <sys/select.h>.
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*/
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#include <sys/queue.h>
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struct knote;
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SLIST_HEAD(klist, knote);
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/*
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* ioctl(2)s supported on kqueue descriptors.
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*/
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#include <sys/ioctl.h>
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struct kfilter_mapping {
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char *name; /* name to lookup or return */
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size_t len; /* length of name */
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uint32_t filter; /* filter to lookup or return */
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};
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/* map filter to name (max size len) */
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#define KFILTER_BYFILTER _IOWR('k', 0, struct kfilter_mapping)
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/* map name to filter (len ignored) */
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#define KFILTER_BYNAME _IOWR('k', 1, struct kfilter_mapping)
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#ifdef _KERNEL
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#define KNOTE(list, hint) if (!SLIST_EMPTY(list)) knote(list, hint)
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/*
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* Flag indicating hint is a signal. Used by EVFILT_SIGNAL, and also
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* shared by EVFILT_PROC (all knotes attached to p->p_klist)
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*/
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#define NOTE_SIGNAL 0x08000000
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/*
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* Callback methods for each filter type.
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*/
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struct filterops {
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int f_isfd; /* true if ident == filedescriptor */
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int (*f_attach) (struct knote *);
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/* called when knote is ADDed */
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void (*f_detach) (struct knote *);
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/* called when knote is DELETEd */
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int (*f_event) (struct knote *, long);
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/* called when event is triggered */
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};
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/*
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* Field locking:
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*
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* f kn_kq->kq_fdp->fd_lock
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* q kn_kq->kq_lock
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* o object mutex (e.g. device driver or vnode interlock)
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*/
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struct kfilter;
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struct knote {
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SLIST_ENTRY(knote) kn_link; /* f: for fd */
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SLIST_ENTRY(knote) kn_selnext; /* o: for struct selinfo */
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TAILQ_ENTRY(knote) kn_tqe; /* q: for struct kqueue */
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struct kqueue *kn_kq; /* q: which queue we are on */
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struct kevent kn_kevent;
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uint32_t kn_status;
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uint32_t kn_sfflags; /* saved filter flags */
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uintptr_t kn_sdata; /* saved data field */
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void *kn_obj; /* pointer to monitored obj */
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const struct filterops *kn_fop;
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struct kfilter *kn_kfilter;
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void *kn_hook;
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#define KN_ACTIVE 0x01 /* event has been triggered */
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#define KN_QUEUED 0x02 /* event is on queue */
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#define KN_DISABLED 0x04 /* event is disabled */
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#define KN_DETACHED 0x08 /* knote is detached */
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#define KN_MARKER 0x10 /* is a marker */
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#define kn_id kn_kevent.ident
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#define kn_filter kn_kevent.filter
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#define kn_flags kn_kevent.flags
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#define kn_fflags kn_kevent.fflags
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#define kn_data kn_kevent.data
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};
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#include <sys/systm.h> /* for copyin_t */
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struct lwp;
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struct timespec;
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void kqueue_init(void);
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void knote(struct klist *, long);
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void knote_fdclose(int);
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typedef int (*kevent_fetch_changes_t)(void *, const struct kevent *,
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struct kevent *, size_t, int);
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typedef int (*kevent_put_events_t)(void *, struct kevent *, struct kevent *,
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size_t, int);
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struct kevent_ops {
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void *keo_private;
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copyin_t keo_fetch_timeout;
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kevent_fetch_changes_t keo_fetch_changes;
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kevent_put_events_t keo_put_events;
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};
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int kevent_fetch_changes(void *, const struct kevent *, struct kevent *,
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size_t, int);
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int kevent_put_events(void *, struct kevent *, struct kevent *, size_t,
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int);
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int kevent1(register_t *, int, const struct kevent *,
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size_t, struct kevent *, size_t, const struct timespec *,
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const struct kevent_ops *);
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int kfilter_register(const char *, const struct filterops *, int *);
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int kfilter_unregister(const char *);
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int filt_seltrue(struct knote *, long);
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extern const struct filterops seltrue_filtops;
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#else /* !_KERNEL */
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#include <sys/cdefs.h>
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struct timespec;
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__BEGIN_DECLS
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#if defined(_NETBSD_SOURCE)
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int kqueue(void);
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int kqueue1(int);
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#ifndef __LIBC12_SOURCE__
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int kevent(int, const struct kevent *, size_t, struct kevent *, size_t,
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const struct timespec *) __RENAME(__kevent50);
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#endif
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#endif /* !_POSIX_C_SOURCE */
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__END_DECLS
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#endif /* !_KERNEL */
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#endif /* !_SYS_EVENT_H_ */
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