/*
- * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*
*/
#include <sys/kernel.h>
#include <sys/proc_internal.h>
#include <sys/kauth.h>
-#include <sys/malloc.h>
+#include <sys/malloc.h>
#include <sys/unistd.h>
#include <sys/file_internal.h>
#include <sys/fcntl.h>
#include <sys/vnode_internal.h>
#include <string.h>
#include <sys/proc_info.h>
+#include <sys/codesign.h>
-#include <kern/lock.h>
+#include <kern/locks.h>
#include <kern/clock.h>
#include <kern/thread_call.h>
#include <kern/sched_prim.h>
+#include <kern/wait_queue.h>
#include <kern/zalloc.h>
#include <kern/assert.h>
#include <libkern/libkern.h>
#include "net/net_str_id.h"
+#include <mach/task.h>
+
+#if VM_PRESSURE_EVENTS
+#include <kern/vm_pressure.h>
+#endif
+
+#if CONFIG_MEMORYSTATUS
+#include <sys/kern_memorystatus.h>
+#endif
+
MALLOC_DEFINE(M_KQUEUE, "kqueue", "memory for kqueue system");
-#define KQ_EVENT NULL
+#define KQ_EVENT NULL
static inline void kqlock(struct kqueue *kq);
static inline void kqunlock(struct kqueue *kq);
-static int kqlock2knoteuse(struct kqueue *kq, struct knote *kn);
-static int kqlock2knoteusewait(struct kqueue *kq, struct knote *kn);
-static int kqlock2knotedrop(struct kqueue *kq, struct knote *kn);
-static int knoteuse2kqlock(struct kqueue *kq, struct knote *kn);
-
-static void kqueue_wakeup(struct kqueue *kq, int closed);
-static int kqueue_read(struct fileproc *fp, struct uio *uio,
- int flags, vfs_context_t ctx);
-static int kqueue_write(struct fileproc *fp, struct uio *uio,
- int flags, vfs_context_t ctx);
-static int kqueue_ioctl(struct fileproc *fp, u_long com, caddr_t data,
- vfs_context_t ctx);
-static int kqueue_select(struct fileproc *fp, int which, void *wql,
- vfs_context_t ctx);
-static int kqueue_close(struct fileglob *fg, vfs_context_t ctx);
-static int kqueue_kqfilter(struct fileproc *fp, struct knote *kn, vfs_context_t ctx);
-static int kqueue_drain(struct fileproc *fp, vfs_context_t ctx);
-extern int kqueue_stat(struct fileproc *fp, void *ub, int isstat64, vfs_context_t ctx);
-
-static struct fileops kqueueops = {
- .fo_read = kqueue_read,
- .fo_write = kqueue_write,
- .fo_ioctl = kqueue_ioctl,
- .fo_select = kqueue_select,
- .fo_close = kqueue_close,
- .fo_kqfilter = kqueue_kqfilter,
+static int kqlock2knoteuse(struct kqueue *kq, struct knote *kn);
+static int kqlock2knoteusewait(struct kqueue *kq, struct knote *kn);
+static int kqlock2knotedrop(struct kqueue *kq, struct knote *kn);
+static int knoteuse2kqlock(struct kqueue *kq, struct knote *kn);
+
+static void kqueue_wakeup(struct kqueue *kq, int closed);
+static int kqueue_read(struct fileproc *fp, struct uio *uio,
+ int flags, vfs_context_t ctx);
+static int kqueue_write(struct fileproc *fp, struct uio *uio,
+ int flags, vfs_context_t ctx);
+static int kqueue_ioctl(struct fileproc *fp, u_long com, caddr_t data,
+ vfs_context_t ctx);
+static int kqueue_select(struct fileproc *fp, int which, void *wql,
+ vfs_context_t ctx);
+static int kqueue_close(struct fileglob *fg, vfs_context_t ctx);
+static int kqueue_kqfilter(struct fileproc *fp, struct knote *kn,
+ vfs_context_t ctx);
+static int kqueue_drain(struct fileproc *fp, vfs_context_t ctx);
+
+static const struct fileops kqueueops = {
+ .fo_type = DTYPE_KQUEUE,
+ .fo_read = kqueue_read,
+ .fo_write = kqueue_write,
+ .fo_ioctl = kqueue_ioctl,
+ .fo_select = kqueue_select,
+ .fo_close = kqueue_close,
+ .fo_kqfilter = kqueue_kqfilter,
.fo_drain = kqueue_drain,
};
static int kevent_internal(struct proc *p, int iskev64, user_addr_t changelist,
- int nchanges, user_addr_t eventlist, int nevents, int fd,
- user_addr_t utimeout, unsigned int flags, int32_t *retval);
-static int kevent_copyin(user_addr_t *addrp, struct kevent64_s *kevp, struct proc *p, int iskev64);
-static int kevent_copyout(struct kevent64_s *kevp, user_addr_t *addrp, struct proc *p, int iskev64);
+ int nchanges, user_addr_t eventlist, int nevents, int fd,
+ user_addr_t utimeout, unsigned int flags, int32_t *retval);
+static int kevent_copyin(user_addr_t *addrp, struct kevent64_s *kevp,
+ struct proc *p, int iskev64);
+static int kevent_copyout(struct kevent64_s *kevp, user_addr_t *addrp,
+ struct proc *p, int iskev64);
char * kevent_description(struct kevent64_s *kevp, char *s, size_t n);
-static int kevent_callback(struct kqueue *kq, struct kevent64_s *kevp, void *data);
-static void kevent_continue(struct kqueue *kq, void *data, int error);
-static void kqueue_scan_continue(void *contp, wait_result_t wait_result);
-static int kqueue_process(struct kqueue *kq, kevent_callback_t callback,
- void *data, int *countp, struct proc *p);
-static int knote_process(struct knote *kn, kevent_callback_t callback,
- void *data, struct kqtailq *inprocessp, struct proc *p);
-static void knote_put(struct knote *kn);
-static int knote_fdpattach(struct knote *kn, struct filedesc *fdp, struct proc *p);
-static void knote_drop(struct knote *kn, struct proc *p);
-static void knote_activate(struct knote *kn, int);
-static void knote_deactivate(struct knote *kn);
-static void knote_enqueue(struct knote *kn);
-static void knote_dequeue(struct knote *kn);
-static struct knote *knote_alloc(void);
-static void knote_free(struct knote *kn);
-
-static int filt_fileattach(struct knote *kn);
+static int kevent_callback(struct kqueue *kq, struct kevent64_s *kevp,
+ void *data);
+static void kevent_continue(struct kqueue *kq, void *data, int error);
+static void kqueue_scan_continue(void *contp, wait_result_t wait_result);
+static int kqueue_process(struct kqueue *kq, kevent_callback_t callback,
+ void *data, int *countp, struct proc *p);
+static int kqueue_begin_processing(struct kqueue *kq);
+static void kqueue_end_processing(struct kqueue *kq);
+static int knote_process(struct knote *kn, kevent_callback_t callback,
+ void *data, struct kqtailq *inprocessp, struct proc *p);
+static void knote_put(struct knote *kn);
+static int knote_fdpattach(struct knote *kn, struct filedesc *fdp,
+ struct proc *p);
+static void knote_drop(struct knote *kn, struct proc *p);
+static void knote_activate(struct knote *kn, int);
+static void knote_deactivate(struct knote *kn);
+static void knote_enqueue(struct knote *kn);
+static void knote_dequeue(struct knote *kn);
+static struct knote *knote_alloc(void);
+static void knote_free(struct knote *kn);
+
+static int filt_fileattach(struct knote *kn);
static struct filterops file_filtops = {
- .f_isfd = 1,
- .f_attach = filt_fileattach,
+ .f_isfd = 1,
+ .f_attach = filt_fileattach,
};
-static void filt_kqdetach(struct knote *kn);
-static int filt_kqueue(struct knote *kn, long hint);
+static void filt_kqdetach(struct knote *kn);
+static int filt_kqueue(struct knote *kn, long hint);
static struct filterops kqread_filtops = {
- .f_isfd = 1,
- .f_detach = filt_kqdetach,
- .f_event = filt_kqueue,
+ .f_isfd = 1,
+ .f_detach = filt_kqdetach,
+ .f_event = filt_kqueue,
};
-/*
- * placeholder for not-yet-implemented filters
- */
-static int filt_badattach(struct knote *kn);
+/* placeholder for not-yet-implemented filters */
+static int filt_badattach(struct knote *kn);
static struct filterops bad_filtops = {
- .f_attach = filt_badattach,
+ .f_attach = filt_badattach,
};
-static int filt_procattach(struct knote *kn);
-static void filt_procdetach(struct knote *kn);
-static int filt_proc(struct knote *kn, long hint);
+static int filt_procattach(struct knote *kn);
+static void filt_procdetach(struct knote *kn);
+static int filt_proc(struct knote *kn, long hint);
static struct filterops proc_filtops = {
- .f_attach = filt_procattach,
- .f_detach = filt_procdetach,
- .f_event = filt_proc,
+ .f_attach = filt_procattach,
+ .f_detach = filt_procdetach,
+ .f_event = filt_proc,
+};
+
+#if VM_PRESSURE_EVENTS
+static int filt_vmattach(struct knote *kn);
+static void filt_vmdetach(struct knote *kn);
+static int filt_vm(struct knote *kn, long hint);
+static struct filterops vm_filtops = {
+ .f_attach = filt_vmattach,
+ .f_detach = filt_vmdetach,
+ .f_event = filt_vm,
};
+#endif /* VM_PRESSURE_EVENTS */
+
+#if CONFIG_MEMORYSTATUS
+extern struct filterops memorystatus_filtops;
+#endif /* CONFIG_MEMORYSTATUS */
extern struct filterops fs_filtops;
extern struct filterops sig_filtops;
/* Timer filter */
-static int filt_timerattach(struct knote *kn);
-static void filt_timerdetach(struct knote *kn);
-static int filt_timer(struct knote *kn, long hint);
-static void filt_timertouch(struct knote *kn, struct kevent64_s *kev,
- long type);
+static int filt_timerattach(struct knote *kn);
+static void filt_timerdetach(struct knote *kn);
+static int filt_timer(struct knote *kn, long hint);
+static void filt_timertouch(struct knote *kn, struct kevent64_s *kev,
+ long type);
static struct filterops timer_filtops = {
- .f_attach = filt_timerattach,
- .f_detach = filt_timerdetach,
- .f_event = filt_timer,
- .f_touch = filt_timertouch,
+ .f_attach = filt_timerattach,
+ .f_detach = filt_timerdetach,
+ .f_event = filt_timer,
+ .f_touch = filt_timertouch,
};
/* Helpers */
+static void filt_timerexpire(void *knx, void *param1);
+static int filt_timervalidate(struct knote *kn);
+static void filt_timerupdate(struct knote *kn);
+static void filt_timercancel(struct knote *kn);
-static void filt_timerexpire(void *knx, void *param1);
-static int filt_timervalidate(struct knote *kn);
-static void filt_timerupdate(struct knote *kn);
-static void filt_timercancel(struct knote *kn);
-
-#define TIMER_RUNNING 0x1
-#define TIMER_CANCELWAIT 0x2
+#define TIMER_RUNNING 0x1
+#define TIMER_CANCELWAIT 0x2
static lck_mtx_t _filt_timerlock;
-static void filt_timerlock(void);
-static void filt_timerunlock(void);
+static void filt_timerlock(void);
+static void filt_timerunlock(void);
-static zone_t knote_zone;
+static zone_t knote_zone;
-#define KN_HASH(val, mask) (((val) ^ (val >> 8)) & (mask))
+#define KN_HASH(val, mask) (((val) ^ (val >> 8)) & (mask))
#if 0
extern struct filterops aio_filtops;
extern struct filterops machport_filtops;
/* User filter */
-static int filt_userattach(struct knote *kn);
-static void filt_userdetach(struct knote *kn);
-static int filt_user(struct knote *kn, long hint);
-static void filt_usertouch(struct knote *kn, struct kevent64_s *kev,
- long type);
+static int filt_userattach(struct knote *kn);
+static void filt_userdetach(struct knote *kn);
+static int filt_user(struct knote *kn, long hint);
+static void filt_usertouch(struct knote *kn, struct kevent64_s *kev,
+ long type);
static struct filterops user_filtops = {
- .f_attach = filt_userattach,
- .f_detach = filt_userdetach,
- .f_event = filt_user,
- .f_touch = filt_usertouch,
+ .f_attach = filt_userattach,
+ .f_detach = filt_userdetach,
+ .f_event = filt_user,
+ .f_touch = filt_usertouch,
};
-#if CONFIG_AUDIT
-/* Audit session filter */
-extern struct filterops audit_session_filtops;
-#endif
-
/*
- * Table for for all system-defined filters.
+ * Table for all system-defined filters.
*/
static struct filterops *sysfilt_ops[] = {
&file_filtops, /* EVFILT_READ */
&machport_filtops, /* EVFILT_MACHPORT */
&fs_filtops, /* EVFILT_FS */
&user_filtops, /* EVFILT_USER */
-#if CONFIG_AUDIT
- &audit_session_filtops, /* EVFILT_SESSION */
+ &bad_filtops, /* unused */
+#if VM_PRESSURE_EVENTS
+ &vm_filtops, /* EVFILT_VM */
+#else
+ &bad_filtops, /* EVFILT_VM */
+#endif
+ &file_filtops, /* EVFILT_SOCK */
+#if CONFIG_MEMORYSTATUS
+ &memorystatus_filtops, /* EVFILT_MEMORYSTATUS */
#else
- &bad_filtops,
+ &bad_filtops, /* EVFILT_MEMORYSTATUS */
#endif
};
lck_spin_unlock(&kq->kq_lock);
}
-/*
+/*
* Convert a kq lock to a knote use referece.
*
* If the knote is being dropped, we can't get
* a use reference, so just return with it
* still locked.
- *
* - kq locked at entry
* - unlock on exit if we get the use reference
*/
kqlock2knoteuse(struct kqueue *kq, struct knote *kn)
{
if (kn->kn_status & KN_DROPPING)
- return 0;
+ return (0);
kn->kn_inuse++;
kqunlock(kq);
- return 1;
- }
+ return (1);
+}
-/*
+/*
* Convert a kq lock to a knote use referece,
* but wait for attach and drop events to complete.
*
* If the knote is being dropped, we can't get
* a use reference, so just return with it
* still locked.
- *
* - kq locked at entry
* - kq always unlocked on exit
*/
{
if ((kn->kn_status & (KN_DROPPING | KN_ATTACHING)) != 0) {
kn->kn_status |= KN_USEWAIT;
- wait_queue_assert_wait((wait_queue_t)kq->kq_wqs, &kn->kn_status, THREAD_UNINT, 0);
+ wait_queue_assert_wait((wait_queue_t)kq->kq_wqs,
+ &kn->kn_status, THREAD_UNINT, 0);
kqunlock(kq);
thread_block(THREAD_CONTINUE_NULL);
- return 0;
+ return (0);
}
kn->kn_inuse++;
kqunlock(kq);
- return 1;
- }
-
+ return (1);
+}
-/*
+/*
* Convert from a knote use reference back to kq lock.
*
* Drop a use reference and wake any waiters if
}
if ((kn->kn_status & KN_USEWAIT) != 0) {
kn->kn_status &= ~KN_USEWAIT;
- wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, &kn->kn_status, THREAD_AWAKENED);
+ wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs,
+ &kn->kn_status, THREAD_AWAKENED);
}
}
return ((kn->kn_status & KN_DROPPING) == 0);
- }
+}
-/*
- * Convert a kq lock to a knote drop referece.
+/*
+ * Convert a kq lock to a knote drop reference.
*
* If the knote is in use, wait for the use count
* to subside. We first mark our intention to drop
* it - keeping other users from "piling on."
* If we are too late, we have to wait for the
* other drop to complete.
- *
+ *
* - kq locked at entry
* - always unlocked on exit.
* - caller can't hold any locks that would prevent
int oktodrop;
oktodrop = ((kn->kn_status & (KN_DROPPING | KN_ATTACHING)) == 0);
+ kn->kn_status &= ~KN_STAYQUEUED;
kn->kn_status |= KN_DROPPING;
if (oktodrop) {
if (kn->kn_inuse == 0) {
kqunlock(kq);
- return oktodrop;
+ return (oktodrop);
}
}
kn->kn_status |= KN_USEWAIT;
- wait_queue_assert_wait((wait_queue_t)kq->kq_wqs, &kn->kn_status, THREAD_UNINT, 0);
+ wait_queue_assert_wait((wait_queue_t)kq->kq_wqs, &kn->kn_status,
+ THREAD_UNINT, 0);
kqunlock(kq);
thread_block(THREAD_CONTINUE_NULL);
- return oktodrop;
+ return (oktodrop);
}
-
-/*
+
+/*
* Release a knote use count reference.
*/
static void
if (--kn->kn_inuse == 0) {
if ((kn->kn_status & KN_USEWAIT) != 0) {
kn->kn_status &= ~KN_USEWAIT;
- wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, &kn->kn_status, THREAD_AWAKENED);
+ wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs,
+ &kn->kn_status, THREAD_AWAKENED);
}
}
kqunlock(kq);
- }
+}
static int
filt_fileattach(struct knote *kn)
{
-
return (fo_kqfilter(kn->kn_fp, kn, vfs_context_current()));
}
-#define f_flag f_fglob->fg_flag
-#define f_type f_fglob->fg_type
-#define f_msgcount f_fglob->fg_msgcount
-#define f_cred f_fglob->fg_cred
-#define f_ops f_fglob->fg_ops
-#define f_offset f_fglob->fg_offset
-#define f_data f_fglob->fg_data
+#define f_flag f_fglob->fg_flag
+#define f_msgcount f_fglob->fg_msgcount
+#define f_cred f_fglob->fg_cred
+#define f_ops f_fglob->fg_ops
+#define f_offset f_fglob->fg_offset
+#define f_data f_fglob->fg_data
static void
filt_kqdetach(struct knote *kn)
struct proc *p;
assert(PID_MAX < NOTE_PDATAMASK);
-
+
if ((kn->kn_sfflags & (NOTE_TRACK | NOTE_TRACKERR | NOTE_CHILD)) != 0)
- return(ENOTSUP);
+ return (ENOTSUP);
p = proc_find(kn->kn_id);
if (p == NULL) {
return (ESRCH);
}
+ const int NoteExitStatusBits = NOTE_EXIT | NOTE_EXITSTATUS;
+
+ if ((kn->kn_sfflags & NoteExitStatusBits) == NoteExitStatusBits)
+ do {
+ pid_t selfpid = proc_selfpid();
+
+ if (p->p_ppid == selfpid)
+ break; /* parent => ok */
+
+ if ((p->p_lflag & P_LTRACED) != 0 &&
+ (p->p_oppid == selfpid))
+ break; /* parent-in-waiting => ok */
+
+ proc_rele(p);
+ return (EACCES);
+ } while (0);
+
proc_klist_lock();
kn->kn_flags |= EV_CLEAR; /* automatically set */
struct proc *p;
proc_klist_lock();
-
+
p = kn->kn_ptr.p_proc;
if (p != PROC_NULL) {
kn->kn_ptr.p_proc = PROC_NULL;
static int
filt_proc(struct knote *kn, long hint)
{
+ /*
+ * Note: a lot of bits in hint may be obtained from the knote
+ * To free some of those bits, see <rdar://problem/12592988> Freeing up
+ * bits in hint for filt_proc
+ */
/* hint is 0 when called from above */
if (hint != 0) {
u_int event;
*/
event = (u_int)hint & NOTE_PCTRLMASK;
+ /*
+ * termination lifecycle events can happen while a debugger
+ * has reparented a process, in which case notifications
+ * should be quashed except to the tracing parent. When
+ * the debugger reaps the child (either via wait4(2) or
+ * process exit), the child will be reparented to the original
+ * parent and these knotes re-fired.
+ */
+ if (event & NOTE_EXIT) {
+ if ((kn->kn_ptr.p_proc->p_oppid != 0)
+ && (kn->kn_kq->kq_p->p_pid != kn->kn_ptr.p_proc->p_ppid)) {
+ /*
+ * This knote is not for the current ptrace(2) parent, ignore.
+ */
+ return 0;
+ }
+ }
+
/*
* if the user is interested in this event, record it.
*/
if (kn->kn_sfflags & event)
kn->kn_fflags |= event;
- if (event == NOTE_REAP || (event == NOTE_EXIT && !(kn->kn_sfflags & NOTE_REAP))) {
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+ if ((event == NOTE_REAP) || ((event == NOTE_EXIT) && !(kn->kn_sfflags & NOTE_REAP))) {
kn->kn_flags |= (EV_EOF | EV_ONESHOT);
}
+#pragma clang diagnostic pop
+
+
+ /*
+ * The kernel has a wrapper in place that returns the same data
+ * as is collected here, in kn_data. Any changes to how
+ * NOTE_EXITSTATUS and NOTE_EXIT_DETAIL are collected
+ * should also be reflected in the proc_pidnoteexit() wrapper.
+ */
+ if (event == NOTE_EXIT) {
+ kn->kn_data = 0;
+ if ((kn->kn_sfflags & NOTE_EXITSTATUS) != 0) {
+ kn->kn_fflags |= NOTE_EXITSTATUS;
+ kn->kn_data |= (hint & NOTE_PDATAMASK);
+ }
+ if ((kn->kn_sfflags & NOTE_EXIT_DETAIL) != 0) {
+ kn->kn_fflags |= NOTE_EXIT_DETAIL;
+ if ((kn->kn_ptr.p_proc->p_lflag &
+ P_LTERM_DECRYPTFAIL) != 0) {
+ kn->kn_data |= NOTE_EXIT_DECRYPTFAIL;
+ }
+ if ((kn->kn_ptr.p_proc->p_lflag &
+ P_LTERM_JETSAM) != 0) {
+ kn->kn_data |= NOTE_EXIT_MEMORY;
+ switch (kn->kn_ptr.p_proc->p_lflag &
+ P_JETSAM_MASK) {
+ case P_JETSAM_VMPAGESHORTAGE:
+ kn->kn_data |= NOTE_EXIT_MEMORY_VMPAGESHORTAGE;
+ break;
+ case P_JETSAM_VMTHRASHING:
+ kn->kn_data |= NOTE_EXIT_MEMORY_VMTHRASHING;
+ break;
+ case P_JETSAM_FCTHRASHING:
+ kn->kn_data |= NOTE_EXIT_MEMORY_FCTHRASHING;
+ break;
+ case P_JETSAM_VNODE:
+ kn->kn_data |= NOTE_EXIT_MEMORY_VNODE;
+ break;
+ case P_JETSAM_HIWAT:
+ kn->kn_data |= NOTE_EXIT_MEMORY_HIWAT;
+ break;
+ case P_JETSAM_PID:
+ kn->kn_data |= NOTE_EXIT_MEMORY_PID;
+ break;
+ case P_JETSAM_IDLEEXIT:
+ kn->kn_data |= NOTE_EXIT_MEMORY_IDLE;
+ break;
+ }
+ }
+ if ((kn->kn_ptr.p_proc->p_csflags &
+ CS_KILLED) != 0) {
+ kn->kn_data |= NOTE_EXIT_CSERROR;
+ }
+ }
+ }
}
/* atomic check, no locking need when called from above */
- return (kn->kn_fflags != 0);
+ return (kn->kn_fflags != 0);
}
+#if VM_PRESSURE_EVENTS
+/*
+ * Virtual memory kevents
+ *
+ * author: Matt Jacobson [matthew_jacobson@apple.com]
+ */
+
+static int
+filt_vmattach(struct knote *kn)
+{
+ /*
+ * The note will be cleared once the information has been flushed to
+ * the client. If there is still pressure, we will be re-alerted.
+ */
+ kn->kn_flags |= EV_CLEAR;
+ return (vm_knote_register(kn));
+}
+
+static void
+filt_vmdetach(struct knote *kn)
+{
+ vm_knote_unregister(kn);
+}
+
+static int
+filt_vm(struct knote *kn, long hint)
+{
+ /* hint == 0 means this is just an alive? check (always true) */
+ if (hint != 0) {
+ const pid_t pid = (pid_t)hint;
+ if ((kn->kn_sfflags & NOTE_VM_PRESSURE) &&
+ (kn->kn_kq->kq_p->p_pid == pid)) {
+ kn->kn_fflags |= NOTE_VM_PRESSURE;
+ }
+ }
+
+ return (kn->kn_fflags != 0);
+}
+#endif /* VM_PRESSURE_EVENTS */
/*
* filt_timervalidate - process data from user
- *
- * Converts to either interval or deadline format.
- *
+ *
+ * Converts to either interval or deadline format.
+ *
* The saved-data field in the knote contains the
* time value. The saved filter-flags indicates
* the unit of measurement.
*
- * After validation, either the saved-data field
- * contains the interval in absolute time, or ext[0]
- * contains the expected deadline. If that deadline
+ * After validation, either the saved-data field
+ * contains the interval in absolute time, or ext[0]
+ * contains the expected deadline. If that deadline
* is in the past, ext[0] is 0.
*
* Returns EINVAL for unrecognized units of time.
filt_timervalidate(struct knote *kn)
{
uint64_t multiplier;
- uint64_t raw;
+ uint64_t raw = 0;
switch (kn->kn_sfflags & (NOTE_SECONDS|NOTE_USECONDS|NOTE_NSECONDS)) {
case NOTE_SECONDS:
multiplier = NSEC_PER_SEC / 1000;
break;
default:
- return EINVAL;
+ return (EINVAL);
+ }
+
+ /* transform the slop delta(leeway) in kn_ext[1] if passed to same time scale */
+ if(kn->kn_sfflags & NOTE_LEEWAY){
+ nanoseconds_to_absolutetime((uint64_t)kn->kn_ext[1] * multiplier, &raw);
+ kn->kn_ext[1] = raw;
}
nanoseconds_to_absolutetime((uint64_t)kn->kn_sdata * multiplier, &raw);
uint64_t now;
clock_get_calendar_nanotime(&seconds, &nanoseconds);
- nanoseconds_to_absolutetime((uint64_t)seconds * NSEC_PER_SEC +
- nanoseconds, &now);
+ nanoseconds_to_absolutetime((uint64_t)seconds * NSEC_PER_SEC +
+ nanoseconds, &now);
if (raw < now) {
/* time has already passed */
kn->kn_ext[0] = 0;
} else {
raw -= now;
- clock_absolutetime_interval_to_deadline(raw,
- &kn->kn_ext[0]);
+ clock_absolutetime_interval_to_deadline(raw,
+ &kn->kn_ext[0]);
}
} else {
kn->kn_sdata = raw;
}
- return 0;
+ return (0);
}
/*
*
* Timer filter lock is held.
*/
-static void
+static void
filt_timerupdate(struct knote *kn)
{
/* if there's no interval, deadline is just in kn_ext[0] */
/* if timer hasn't fired before, fire in interval nsecs */
if (kn->kn_ext[0] == 0) {
clock_absolutetime_interval_to_deadline(kn->kn_sdata,
- &kn->kn_ext[0]);
+ &kn->kn_ext[0]);
} else {
- /*
- * If timer has fired before, schedule the next pop
- * relative to the last intended deadline.
+ /*
+ * If timer has fired before, schedule the next pop
+ * relative to the last intended deadline.
*
- * We could check for whether the deadline has expired,
+ * We could check for whether the deadline has expired,
* but the thread call layer can handle that.
*/
kn->kn_ext[0] += kn->kn_sdata;
}
}
-/*
+/*
* filt_timerexpire - the timer callout routine
*
- * Just propagate the timer event into the knote
- * filter routine (by going through the knote
- * synchronization point). Pass a hint to
- * indicate this is a real event, not just a
- * query from above.
+ * Just propagate the timer event into the knote
+ * filter routine (by going through the knote
+ * synchronization point). Pass a hint to
+ * indicate this is a real event, not just a
+ * query from above.
*/
static void
filt_timerexpire(void *knx, __unused void *spare)
/* no "object" for timers, so fake a list */
SLIST_INIT(&timer_list);
- SLIST_INSERT_HEAD(&timer_list, kn, kn_selnext);
+ SLIST_INSERT_HEAD(&timer_list, kn, kn_selnext);
KNOTE(&timer_list, 1);
/* if someone is waiting for timer to pop */
if (kn->kn_hookid & TIMER_CANCELWAIT) {
struct kqueue *kq = kn->kn_kq;
- wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, &kn->kn_hook,
- THREAD_AWAKENED);
+ wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, &kn->kn_hook,
+ THREAD_AWAKENED);
}
filt_timerunlock();
} else {
/* we have to wait for the expire routine. */
kn->kn_hookid |= TIMER_CANCELWAIT;
- wait_queue_assert_wait((wait_queue_t)kq->kq_wqs,
- &kn->kn_hook, THREAD_UNINT, 0);
+ wait_queue_assert_wait((wait_queue_t)kq->kq_wqs,
+ &kn->kn_hook, THREAD_UNINT, 0);
filt_timerunlock();
thread_block(THREAD_CONTINUE_NULL);
filt_timerlock();
/*
* Allocate a thread call for the knote's lifetime, and kick off the timer.
- */
+ */
static int
filt_timerattach(struct knote *kn)
{
filt_timerlock();
error = filt_timervalidate(kn);
- if (error) {
+ if (error != 0) {
filt_timerunlock();
return (error);
}
/* absolute=EV_ONESHOT */
if (kn->kn_sfflags & NOTE_ABSOLUTE)
- kn->kn_flags |= EV_ONESHOT;
+ kn->kn_flags |= EV_ONESHOT;
filt_timerupdate(kn);
if (kn->kn_ext[0]) {
kn->kn_flags |= EV_CLEAR;
- thread_call_enter_delayed(callout, kn->kn_ext[0]);
+ unsigned int timer_flags = 0;
+ if (kn->kn_sfflags & NOTE_CRITICAL)
+ timer_flags |= THREAD_CALL_DELAY_USER_CRITICAL;
+ else if (kn->kn_sfflags & NOTE_BACKGROUND)
+ timer_flags |= THREAD_CALL_DELAY_USER_BACKGROUND;
+ else
+ timer_flags |= THREAD_CALL_DELAY_USER_NORMAL;
+
+ if (kn->kn_sfflags & NOTE_LEEWAY)
+ timer_flags |= THREAD_CALL_DELAY_LEEWAY;
+
+ thread_call_enter_delayed_with_leeway(callout, NULL,
+ kn->kn_ext[0], kn->kn_ext[1], timer_flags);
+
kn->kn_hookid |= TIMER_RUNNING;
} else {
/* fake immediate */
callout = (thread_call_t)kn->kn_hook;
filt_timercancel(kn);
-
- filt_timerunlock();
+
+ filt_timerunlock();
thread_call_free(callout);
}
filt_timer(struct knote *kn, long hint)
{
int result;
-
+
if (hint) {
/* real timer pop -- timer lock held by filt_timerexpire */
-
kn->kn_data++;
- if (((kn->kn_hookid & TIMER_CANCELWAIT) == 0) &&
+ if (((kn->kn_hookid & TIMER_CANCELWAIT) == 0) &&
((kn->kn_flags & EV_ONESHOT) == 0)) {
/* evaluate next time to fire */
filt_timerupdate(kn);
if (kn->kn_ext[0]) {
+ unsigned int timer_flags = 0;
+
/* keep the callout and re-arm */
- thread_call_enter_delayed(kn->kn_hook,
- kn->kn_ext[0]);
+ if (kn->kn_sfflags & NOTE_CRITICAL)
+ timer_flags |= THREAD_CALL_DELAY_USER_CRITICAL;
+ else if (kn->kn_sfflags & NOTE_BACKGROUND)
+ timer_flags |= THREAD_CALL_DELAY_USER_BACKGROUND;
+ else
+ timer_flags |= THREAD_CALL_DELAY_USER_NORMAL;
+
+ if (kn->kn_sfflags & NOTE_LEEWAY)
+ timer_flags |= THREAD_CALL_DELAY_LEEWAY;
+
+ thread_call_enter_delayed_with_leeway(kn->kn_hook, NULL,
+ kn->kn_ext[0], kn->kn_ext[1], timer_flags);
+
kn->kn_hookid |= TIMER_RUNNING;
}
}
- return 1;
- }
+ return (1);
+ }
/* user-query */
filt_timerlock();
result = (kn->kn_data != 0);
filt_timerunlock();
- return result;
+
+ return (result);
}
/*
* filt_timertouch - update knote with new user input
*
- * Cancel and restart the timer based on new user data. When
- * the user picks up a knote, clear the count of how many timer
- * pops have gone off (in kn_data).
+ * Cancel and restart the timer based on new user data. When
+ * the user picks up a knote, clear the count of how many timer
+ * pops have gone off (in kn_data).
*/
-static void
+static void
filt_timertouch(struct knote *kn, struct kevent64_s *kev, long type)
{
int error;
/* recalculate deadline */
kn->kn_sdata = kev->data;
kn->kn_sfflags = kev->fflags;
+ kn->kn_ext[0] = kev->ext[0];
+ kn->kn_ext[1] = kev->ext[1];
error = filt_timervalidate(kn);
if (error) {
kn->kn_flags |= EV_ERROR;
kn->kn_data = error;
break;
- }
+ }
/* start timer if necessary */
filt_timerupdate(kn);
+
if (kn->kn_ext[0]) {
- thread_call_enter_delayed(kn->kn_hook, kn->kn_ext[0]);
+ unsigned int timer_flags = 0;
+ if (kn->kn_sfflags & NOTE_CRITICAL)
+ timer_flags |= THREAD_CALL_DELAY_USER_CRITICAL;
+ else if (kn->kn_sfflags & NOTE_BACKGROUND)
+ timer_flags |= THREAD_CALL_DELAY_USER_BACKGROUND;
+ else
+ timer_flags |= THREAD_CALL_DELAY_USER_NORMAL;
+
+ if (kn->kn_sfflags & NOTE_LEEWAY)
+ timer_flags |= THREAD_CALL_DELAY_LEEWAY;
+
+ thread_call_enter_delayed_with_leeway(kn->kn_hook, NULL,
+ kn->kn_ext[0], kn->kn_ext[1], timer_flags);
+
kn->kn_hookid |= TIMER_RUNNING;
} else {
/* pretend the timer has fired */
kn->kn_fflags = 0;
break;
default:
- panic("filt_timertouch() - invalid type (%ld)", type);
+ panic("%s: - invalid type (%ld)", __func__, type);
break;
}
static int
filt_userattach(struct knote *kn)
{
- /* EVFILT_USER knotes are not attached to anything in the kernel */
- kn->kn_hook = NULL;
- if (kn->kn_fflags & NOTE_TRIGGER || kn->kn_flags & EV_TRIGGER) {
+ /* EVFILT_USER knotes are not attached to anything in the kernel */
+ kn->kn_hook = NULL;
+ if (kn->kn_fflags & NOTE_TRIGGER) {
kn->kn_hookid = 1;
} else {
kn->kn_hookid = 0;
}
- return 0;
+ return (0);
}
static void
filt_userdetach(__unused struct knote *kn)
{
- /* EVFILT_USER knotes are not attached to anything in the kernel */
+ /* EVFILT_USER knotes are not attached to anything in the kernel */
}
static int
filt_user(struct knote *kn, __unused long hint)
{
- return kn->kn_hookid;
+ return (kn->kn_hookid);
}
static void
filt_usertouch(struct knote *kn, struct kevent64_s *kev, long type)
{
- int ffctrl;
- switch (type) {
- case EVENT_REGISTER:
- if (kev->fflags & NOTE_TRIGGER || kev->flags & EV_TRIGGER) {
- kn->kn_hookid = 1;
- }
-
- ffctrl = kev->fflags & NOTE_FFCTRLMASK;
- kev->fflags &= NOTE_FFLAGSMASK;
- switch (ffctrl) {
- case NOTE_FFNOP:
- break;
- case NOTE_FFAND:
- OSBitAndAtomic(kev->fflags, &kn->kn_sfflags);
- break;
- case NOTE_FFOR:
- OSBitOrAtomic(kev->fflags, &kn->kn_sfflags);
- break;
- case NOTE_FFCOPY:
- kn->kn_sfflags = kev->fflags;
- break;
- }
- kn->kn_sdata = kev->data;
- break;
- case EVENT_PROCESS:
- *kev = kn->kn_kevent;
- kev->fflags = (volatile UInt32)kn->kn_sfflags;
- kev->data = kn->kn_sdata;
- if (kn->kn_flags & EV_CLEAR) {
+ uint32_t ffctrl;
+ switch (type) {
+ case EVENT_REGISTER:
+ if (kev->fflags & NOTE_TRIGGER) {
+ kn->kn_hookid = 1;
+ }
+
+ ffctrl = kev->fflags & NOTE_FFCTRLMASK;
+ kev->fflags &= NOTE_FFLAGSMASK;
+ switch (ffctrl) {
+ case NOTE_FFNOP:
+ break;
+ case NOTE_FFAND:
+ OSBitAndAtomic(kev->fflags, &kn->kn_sfflags);
+ break;
+ case NOTE_FFOR:
+ OSBitOrAtomic(kev->fflags, &kn->kn_sfflags);
+ break;
+ case NOTE_FFCOPY:
+ kn->kn_sfflags = kev->fflags;
+ break;
+ }
+ kn->kn_sdata = kev->data;
+ break;
+ case EVENT_PROCESS:
+ *kev = kn->kn_kevent;
+ kev->fflags = (volatile UInt32)kn->kn_sfflags;
+ kev->data = kn->kn_sdata;
+ if (kn->kn_flags & EV_CLEAR) {
kn->kn_hookid = 0;
kn->kn_data = 0;
kn->kn_fflags = 0;
}
- break;
- default:
- panic("filt_usertouch() - invalid type (%ld)", type);
- break;
- }
+ break;
+ default:
+ panic("%s: - invalid type (%ld)", __func__, type);
+ break;
+ }
}
/*
* JMM - placeholder for not-yet-implemented filters
- */
+ */
static int
filt_badattach(__unused struct knote *kn)
{
- return(ENOTSUP);
+ return (ENOTSUP);
}
-
struct kqueue *
kqueue_alloc(struct proc *p)
{
struct filedesc *fdp = p->p_fd;
struct kqueue *kq;
- MALLOC_ZONE(kq, struct kqueue *, sizeof(struct kqueue), M_KQUEUE, M_WAITOK);
+ MALLOC_ZONE(kq, struct kqueue *, sizeof (struct kqueue), M_KQUEUE,
+ M_WAITOK);
if (kq != NULL) {
wait_queue_set_t wqs;
- wqs = wait_queue_set_alloc(SYNC_POLICY_FIFO | SYNC_POLICY_PREPOST);
+ wqs = wait_queue_set_alloc(SYNC_POLICY_FIFO |
+ SYNC_POLICY_PREPOST);
if (wqs != NULL) {
- bzero(kq, sizeof(struct kqueue));
+ bzero(kq, sizeof (struct kqueue));
lck_spin_init(&kq->kq_lock, kq_lck_grp, kq_lck_attr);
TAILQ_INIT(&kq->kq_head);
kq->kq_wqs = wqs;
kq->kq_p = p;
} else {
- FREE_ZONE(kq, sizeof(struct kqueue), M_KQUEUE);
+ FREE_ZONE(kq, sizeof (struct kqueue), M_KQUEUE);
+ kq = NULL;
}
}
if (fdp->fd_knlistsize < 0) {
proc_fdlock(p);
if (fdp->fd_knlistsize < 0)
- fdp->fd_knlistsize = 0; /* this process has had a kq */
+ fdp->fd_knlistsize = 0; /* this process has had a kq */
proc_fdunlock(p);
}
- return kq;
+ return (kq);
}
-
/*
* kqueue_dealloc - detach all knotes from a kqueue and free it
*
}
proc_fdunlock(p);
- /*
+ /*
* before freeing the wait queue set for this kqueue,
* make sure it is unlinked from all its containing (select) sets.
*/
wait_queue_unlink_all((wait_queue_t)kq->kq_wqs);
wait_queue_set_free(kq->kq_wqs);
lck_spin_destroy(&kq->kq_lock, kq_lck_grp);
- FREE_ZONE(kq, sizeof(struct kqueue), M_KQUEUE);
+ FREE_ZONE(kq, sizeof (struct kqueue), M_KQUEUE);
}
int
-kqueue(struct proc *p, __unused struct kqueue_args *uap, int32_t *retval)
+kqueue_body(struct proc *p, fp_allocfn_t fp_zalloc, void *cra, int32_t *retval)
{
struct kqueue *kq;
struct fileproc *fp;
int fd, error;
- error = falloc(p, &fp, &fd, vfs_context_current());
+ error = falloc_withalloc(p,
+ &fp, &fd, vfs_context_current(), fp_zalloc, cra);
if (error) {
return (error);
}
}
fp->f_flag = FREAD | FWRITE;
- fp->f_type = DTYPE_KQUEUE;
fp->f_ops = &kqueueops;
- fp->f_data = (caddr_t)kq;
+ fp->f_data = kq;
proc_fdlock(p);
+ *fdflags(p, fd) |= UF_EXCLOSE;
procfdtbl_releasefd(p, fd, NULL);
fp_drop(p, fd, fp, 1);
proc_fdunlock(p);
return (error);
}
+int
+kqueue(struct proc *p, __unused struct kqueue_args *uap, int32_t *retval)
+{
+ return (kqueue_body(p, fileproc_alloc_init, NULL, retval));
+}
+
static int
-kevent_copyin(user_addr_t *addrp, struct kevent64_s *kevp, struct proc *p, int iskev64)
+kevent_copyin(user_addr_t *addrp, struct kevent64_s *kevp, struct proc *p,
+ int iskev64)
{
int advance;
int error;
if (iskev64) {
- advance = sizeof(struct kevent64_s);
+ advance = sizeof (struct kevent64_s);
error = copyin(*addrp, (caddr_t)kevp, advance);
} else if (IS_64BIT_PROCESS(p)) {
struct user64_kevent kev64;
- bzero(kevp, sizeof(struct kevent64_s));
+ bzero(kevp, sizeof (struct kevent64_s));
- advance = sizeof(kev64);
+ advance = sizeof (kev64);
error = copyin(*addrp, (caddr_t)&kev64, advance);
if (error)
- return error;
+ return (error);
kevp->ident = kev64.ident;
kevp->filter = kev64.filter;
kevp->flags = kev64.flags;
kevp->udata = kev64.udata;
} else {
struct user32_kevent kev32;
- bzero(kevp, sizeof(struct kevent64_s));
+ bzero(kevp, sizeof (struct kevent64_s));
- advance = sizeof(kev32);
+ advance = sizeof (kev32);
error = copyin(*addrp, (caddr_t)&kev32, advance);
if (error)
- return error;
+ return (error);
kevp->ident = (uintptr_t)kev32.ident;
kevp->filter = kev32.filter;
kevp->flags = kev32.flags;
}
if (!error)
*addrp += advance;
- return error;
+ return (error);
}
static int
-kevent_copyout(struct kevent64_s *kevp, user_addr_t *addrp, struct proc *p, int iskev64)
+kevent_copyout(struct kevent64_s *kevp, user_addr_t *addrp, struct proc *p,
+ int iskev64)
{
int advance;
int error;
if (iskev64) {
- advance = sizeof(struct kevent64_s);
+ advance = sizeof (struct kevent64_s);
error = copyout((caddr_t)kevp, *addrp, advance);
} else if (IS_64BIT_PROCESS(p)) {
struct user64_kevent kev64;
* value of (uintptr_t)-1.
*/
kev64.ident = (kevp->ident == (uintptr_t)-1) ?
- (uint64_t)-1LL : (uint64_t)kevp->ident;
+ (uint64_t)-1LL : (uint64_t)kevp->ident;
kev64.filter = kevp->filter;
kev64.flags = kevp->flags;
kev64.fflags = kevp->fflags;
kev64.data = (int64_t) kevp->data;
kev64.udata = kevp->udata;
- advance = sizeof(kev64);
+ advance = sizeof (kev64);
error = copyout((caddr_t)&kev64, *addrp, advance);
} else {
struct user32_kevent kev32;
kev32.fflags = kevp->fflags;
kev32.data = (int32_t)kevp->data;
kev32.udata = kevp->udata;
- advance = sizeof(kev32);
+ advance = sizeof (kev32);
error = copyout((caddr_t)&kev32, *addrp, advance);
}
if (!error)
*addrp += advance;
- return error;
+ return (error);
}
/*
int
kevent(struct proc *p, struct kevent_args *uap, int32_t *retval)
{
- return kevent_internal(p,
- 0,
- uap->changelist,
- uap->nchanges,
- uap->eventlist,
- uap->nevents,
- uap->fd,
- uap->timeout,
- 0, /* no flags from old kevent() call */
- retval);
-}
-
+ return (kevent_internal(p,
+ 0,
+ uap->changelist,
+ uap->nchanges,
+ uap->eventlist,
+ uap->nevents,
+ uap->fd,
+ uap->timeout,
+ 0, /* no flags from old kevent() call */
+ retval));
+}
+
int
kevent64(struct proc *p, struct kevent64_args *uap, int32_t *retval)
{
- return kevent_internal(p,
- 1,
- uap->changelist,
- uap->nchanges,
- uap->eventlist,
- uap->nevents,
- uap->fd,
- uap->timeout,
- uap->flags,
- retval);
+ return (kevent_internal(p,
+ 1,
+ uap->changelist,
+ uap->nchanges,
+ uap->eventlist,
+ uap->nevents,
+ uap->fd,
+ uap->timeout,
+ uap->flags,
+ retval));
}
static int
-kevent_internal(struct proc *p, int iskev64, user_addr_t changelist,
- int nchanges, user_addr_t ueventlist, int nevents, int fd,
- user_addr_t utimeout, __unused unsigned int flags,
- int32_t *retval)
+kevent_internal(struct proc *p, int iskev64, user_addr_t changelist,
+ int nchanges, user_addr_t ueventlist, int nevents, int fd,
+ user_addr_t utimeout, __unused unsigned int flags,
+ int32_t *retval)
{
struct _kevent *cont_args;
uthread_t ut;
TIMESPEC_TO_TIMEVAL(&rtv, &ts);
}
if (error)
- return error;
+ return (error);
if (itimerfix(&rtv))
- return EINVAL;
+ return (EINVAL);
getmicrouptime(&atv);
timevaladd(&atv, &rtv);
} else {
/* get a usecount for the kq itself */
if ((error = fp_getfkq(p, fd, &fp, &kq)) != 0)
- return(error);
-
+ return (error);
+
/* each kq should only be used for events of one type */
kqlock(kq);
if (kq->kq_state & (KQ_KEV32 | KQ_KEV64)) {
error = kevent_copyin(&changelist, &kev, p, iskev64);
if (error)
break;
-
+
kev.flags &= ~EV_SYSFLAGS;
error = kevent_register(kq, &kev, p);
if ((error || (kev.flags & EV_RECEIPT)) && nevents > 0) {
if (nevents > 0 && noutputs == 0 && error == 0)
error = kqueue_scan(kq, kevent_callback,
- kevent_continue, cont_args,
- &atv, p);
+ kevent_continue, cont_args,
+ &atv, p);
kevent_continue(kq, cont_args, error);
errorout:
fp_drop(p, fd, fp, 0);
- return error;
+ return (error);
}
/*
* kevent_callback - callback for each individual event
*
- * called with nothing locked
- * caller holds a reference on the kqueue
+ * called with nothing locked
+ * caller holds a reference on the kqueue
*/
-
static int
-kevent_callback(__unused struct kqueue *kq, struct kevent64_s *kevp,
- void *data)
+kevent_callback(__unused struct kqueue *kq, struct kevent64_s *kevp,
+ void *data)
{
struct _kevent *cont_args;
int error;
/*
* Copy out the appropriate amount of event data for this user.
*/
- error = kevent_copyout(kevp, &cont_args->eventlist, current_proc(), iskev64);
+ error = kevent_copyout(kevp, &cont_args->eventlist, current_proc(),
+ iskev64);
/*
* If there isn't space for additional events, return
* a harmless error to stop the processing here
*/
if (error == 0 && ++cont_args->eventout == cont_args->eventcount)
- error = EWOULDBLOCK;
- return error;
+ error = EWOULDBLOCK;
+ return (error);
}
/*
* kevent_description - format a description of a kevent for diagnostic output
*
- * called with a 128-byte string buffer
+ * called with a 128-byte string buffer
*/
char *
kevent_description(struct kevent64_s *kevp, char *s, size_t n)
{
- snprintf(s, n,
- "kevent="
- "{.ident=%#llx, .filter=%d, .flags=%#x, .fflags=%#x, .data=%#llx, .udata=%#llx, .ext[0]=%#llx, .ext[1]=%#llx}",
- kevp->ident,
- kevp->filter,
- kevp->flags,
- kevp->fflags,
- kevp->data,
- kevp->udata,
- kevp->ext[0],
- kevp->ext[1]);
- return s;
+ snprintf(s, n,
+ "kevent="
+ "{.ident=%#llx, .filter=%d, .flags=%#x, .fflags=%#x, .data=%#llx, .udata=%#llx, .ext[0]=%#llx, .ext[1]=%#llx}",
+ kevp->ident,
+ kevp->filter,
+ kevp->flags,
+ kevp->fflags,
+ kevp->data,
+ kevp->udata,
+ kevp->ext[0],
+ kevp->ext[1]);
+
+ return (s);
}
/*
*/
int
-kevent_register(struct kqueue *kq, struct kevent64_s *kev, __unused struct proc *ctxp)
+kevent_register(struct kqueue *kq, struct kevent64_s *kev,
+ __unused struct proc *ctxp)
{
struct proc *p = kq->kq_p;
struct filedesc *fdp = p->p_fd;
return (EINVAL);
}
- restart:
+restart:
/* this iocount needs to be dropped if it is not registered */
proc_fdlock(p);
if (fops->f_isfd && (error = fp_lookup(p, kev->ident, &fp, 1)) != 0) {
proc_fdunlock(p);
- return(error);
+ return (error);
}
if (fops->f_isfd) {
/* hash non-fd knotes here too */
if (fdp->fd_knhashmask != 0) {
struct klist *list;
-
+
list = &fdp->fd_knhash[
KN_HASH((u_long)kev->ident, fdp->fd_knhashmask)];
SLIST_FOREACH(kn, list, kn_link)
error = fops->f_attach(kn);
- /*
- * Anyone trying to drop this knote will yield to
- * us, since KN_ATTACHING is set.
- */
kqlock(kq);
- if (error != 0 || (kn->kn_status & KN_DROPPING)) {
- if (error == 0) {
- kn->kn_fop->f_detach(kn);
- }
+
+ if (error != 0) {
+ /*
+ * Failed to attach correctly, so drop.
+ * All other possible users/droppers
+ * have deferred to us.
+ */
kn->kn_status |= KN_DROPPING;
kqunlock(kq);
knote_drop(kn, p);
goto done;
+ } else if (kn->kn_status & KN_DROPPING) {
+ /*
+ * Attach succeeded, but someone else
+ * deferred their drop - now we have
+ * to do it for them (after detaching).
+ */
+ kqunlock(kq);
+ kn->kn_fop->f_detach(kn);
+ knote_drop(kn, p);
+ goto done;
}
kn->kn_status &= ~KN_ATTACHING;
kqunlock(kq);
/* existing knote - get kqueue lock */
kqlock(kq);
proc_fdunlock(p);
-
+
if (kev->flags & EV_DELETE) {
knote_dequeue(kn);
kn->kn_status |= KN_DISABLED;
}
goto done;
}
-
+
/* update status flags for existing knote */
if (kev->flags & EV_DISABLE) {
knote_dequeue(kn);
knote_enqueue(kn);
}
+ /*
+ * The user may change some filter values after the
+ * initial EV_ADD, but doing so will not reset any
+ * filter which have already been triggered.
+ */
+ kn->kn_kevent.udata = kev->udata;
+ if (fops->f_isfd || fops->f_touch == NULL) {
+ kn->kn_sfflags = kev->fflags;
+ kn->kn_sdata = kev->data;
+ }
+
/*
* If somebody is in the middle of dropping this
* knote - go find/insert a new one. But we have
}
/*
- * The user may change some filter values after the
- * initial EV_ADD, but doing so will not reset any
- * filter which have already been triggered.
+ * Call touch routine to notify filter of changes
+ * in filter values.
*/
- kn->kn_kevent.udata = kev->udata;
if (!fops->f_isfd && fops->f_touch != NULL)
- fops->f_touch(kn, kev, EVENT_REGISTER);
- else {
- kn->kn_sfflags = kev->fflags;
- kn->kn_sdata = kev->data;
- }
-
- /* We may need to push some info down to a networked filesystem */
- if (kn->kn_filter == EVFILT_VNODE) {
- vnode_knoteupdate(kn);
- }
+ fops->f_touch(kn, kev, EVENT_REGISTER);
}
/* still have use ref on knote */
* kqueue locked on entry and exit - but may be dropped
*/
static int
-knote_process(struct knote *kn,
- kevent_callback_t callback,
- void *data,
- struct kqtailq *inprocessp,
- struct proc *p)
+knote_process(struct knote *kn,
+ kevent_callback_t callback,
+ void *data,
+ struct kqtailq *inprocessp,
+ struct proc *p)
{
struct kqueue *kq = kn->kn_kq;
struct kevent64_s kev;
result = 1;
revalidate = ((kn->kn_status & KN_STAYQUEUED) != 0 ||
- (kn->kn_flags & EV_ONESHOT) == 0);
- touch = (!kn->kn_fop->f_isfd && kn->kn_fop->f_touch != NULL);
+ (kn->kn_flags & EV_ONESHOT) == 0);
+ touch = (!kn->kn_fop->f_isfd && kn->kn_fop->f_touch != NULL);
if (revalidate || touch) {
if (revalidate)
knote_deactivate(kn);
-
+
/* call the filter/touch routines with just a ref */
if (kqlock2knoteuse(kq, kn)) {
-
/* if we have to revalidate, call the filter */
if (revalidate) {
result = kn->kn_fop->f_event(kn, 0);
}
- /* capture the kevent data - using touch if specified */
- if (result) {
- if (touch) {
- kn->kn_fop->f_touch(kn, &kev, EVENT_PROCESS);
- } else {
- kev = kn->kn_kevent;
- }
+ /*
+ * capture the kevent data - using touch if
+ * specified
+ */
+ if (result && touch) {
+ kn->kn_fop->f_touch(kn, &kev,
+ EVENT_PROCESS);
}
- /* convert back to a kqlock - bail if the knote went away */
+
+ /*
+ * convert back to a kqlock - bail if the knote
+ * went away
+ */
if (!knoteuse2kqlock(kq, kn)) {
- return EJUSTRETURN;
+ return (EJUSTRETURN);
} else if (result) {
- /* if revalidated as alive, make sure it's active */
+ /*
+ * if revalidated as alive, make sure
+ * it's active
+ */
if (!(kn->kn_status & KN_ACTIVE)) {
knote_activate(kn, 0);
}
+
+ /*
+ * capture all events that occurred
+ * during filter
+ */
+ if (!touch) {
+ kev = kn->kn_kevent;
+ }
+
} else if ((kn->kn_status & KN_STAYQUEUED) == 0) {
- /* was already dequeued, so just bail on this one */
- return EJUSTRETURN;
+ /*
+ * was already dequeued, so just bail on
+ * this one
+ */
+ return (EJUSTRETURN);
}
} else {
- return EJUSTRETURN;
+ return (EJUSTRETURN);
}
} else {
kev = kn->kn_kevent;
}
}
-
+
/* move knote onto inprocess queue */
assert(kn->kn_tq == &kq->kq_head);
TAILQ_REMOVE(&kq->kq_head, kn, kn_tqe);
*/
if (result == 0) {
- return EJUSTRETURN;
- } else if (kn->kn_flags & EV_ONESHOT) {
+ return (EJUSTRETURN);
+ } else if ((kn->kn_flags & EV_ONESHOT) != 0) {
knote_deactivate(kn);
if (kqlock2knotedrop(kq, kn)) {
kn->kn_fop->f_detach(kn);
knote_drop(kn, p);
}
- } else if (kn->kn_flags & (EV_CLEAR | EV_DISPATCH)) {
- knote_deactivate(kn);
- /* manually clear knotes who weren't 'touch'ed */
- if ((touch == 0) && (kn->kn_flags & EV_CLEAR)) {
+ } else if ((kn->kn_flags & (EV_CLEAR | EV_DISPATCH)) != 0) {
+ if ((kn->kn_flags & EV_DISPATCH) != 0) {
+ /* deactivate and disable all dispatch knotes */
+ knote_deactivate(kn);
+ kn->kn_status |= KN_DISABLED;
+ } else if (!touch || kn->kn_fflags == 0) {
+ /* only deactivate if nothing since the touch */
+ knote_deactivate(kn);
+ }
+ if (!touch && (kn->kn_flags & EV_CLEAR) != 0) {
+ /* manually clear non-touch knotes */
kn->kn_data = 0;
kn->kn_fflags = 0;
}
- if (kn->kn_flags & EV_DISPATCH)
- kn->kn_status |= KN_DISABLED;
kqunlock(kq);
} else {
/*
/* callback to handle each event as we find it */
error = (callback)(kq, &kev, data);
-
+
kqlock(kq);
- return error;
+ return (error);
+}
+
+/*
+ * Return 0 to indicate that processing should proceed,
+ * -1 if there is nothing to process.
+ *
+ * Called with kqueue locked and returns the same way,
+ * but may drop lock temporarily.
+ */
+static int
+kqueue_begin_processing(struct kqueue *kq)
+{
+ for (;;) {
+ if (kq->kq_count == 0) {
+ return (-1);
+ }
+
+ /* if someone else is processing the queue, wait */
+ if (kq->kq_nprocess != 0) {
+ wait_queue_assert_wait((wait_queue_t)kq->kq_wqs,
+ &kq->kq_nprocess, THREAD_UNINT, 0);
+ kq->kq_state |= KQ_PROCWAIT;
+ kqunlock(kq);
+ thread_block(THREAD_CONTINUE_NULL);
+ kqlock(kq);
+ } else {
+ kq->kq_nprocess = 1;
+ return (0);
+ }
+ }
}
+/*
+ * Called with kqueue lock held.
+ */
+static void
+kqueue_end_processing(struct kqueue *kq)
+{
+ kq->kq_nprocess = 0;
+ if (kq->kq_state & KQ_PROCWAIT) {
+ kq->kq_state &= ~KQ_PROCWAIT;
+ wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs,
+ &kq->kq_nprocess, THREAD_AWAKENED);
+ }
+}
/*
* kqueue_process - process the triggered events in a kqueue
static int
kqueue_process(struct kqueue *kq,
- kevent_callback_t callback,
- void *data,
- int *countp,
- struct proc *p)
+ kevent_callback_t callback,
+ void *data,
+ int *countp,
+ struct proc *p)
{
- struct kqtailq inprocess;
+ struct kqtailq inprocess;
struct knote *kn;
int nevents;
int error;
- TAILQ_INIT(&inprocess);
- restart:
- if (kq->kq_count == 0) {
- *countp = 0;
- return 0;
- }
+ TAILQ_INIT(&inprocess);
- /* if someone else is processing the queue, wait */
- if (hw_atomic_add(&kq->kq_nprocess, 1) != 1) {
- hw_atomic_sub(&kq->kq_nprocess, 1);
- wait_queue_assert_wait((wait_queue_t)kq->kq_wqs, &kq->kq_nprocess, THREAD_UNINT, 0);
- kq->kq_state |= KQ_PROCWAIT;
- kqunlock(kq);
- thread_block(THREAD_CONTINUE_NULL);
- kqlock(kq);
- goto restart;
+ if (kqueue_begin_processing(kq) == -1) {
+ *countp = 0;
+ /* Nothing to process */
+ return (0);
}
/*
- * Clear any pre-posted status from previous runs, so we only
- * detect events that occur during this run.
+ * Clear any pre-posted status from previous runs, so we
+ * only detect events that occur during this run.
*/
wait_queue_sub_clearrefs(kq->kq_wqs);
nevents = 0;
while (error == 0 &&
- (kn = TAILQ_FIRST(&kq->kq_head)) != NULL) {
+ (kn = TAILQ_FIRST(&kq->kq_head)) != NULL) {
error = knote_process(kn, callback, data, &inprocess, p);
if (error == EJUSTRETURN)
error = 0;
kn->kn_tq = &kq->kq_head;
TAILQ_INSERT_TAIL(&kq->kq_head, kn, kn_tqe);
}
- hw_atomic_sub(&kq->kq_nprocess, 1);
- if (kq->kq_state & KQ_PROCWAIT) {
- kq->kq_state &= ~KQ_PROCWAIT;
- wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, &kq->kq_nprocess, THREAD_AWAKENED);
- }
+
+ kqueue_end_processing(kq);
*countp = nevents;
- return error;
+ return (error);
}
switch (wait_result) {
case THREAD_AWAKENED:
kqlock(kq);
- error = kqueue_process(kq, cont_args->call, cont_args, &count, current_proc());
+ error = kqueue_process(kq, cont_args->call, cont_args, &count,
+ current_proc());
if (error == 0 && count == 0) {
- wait_queue_assert_wait((wait_queue_t)kq->kq_wqs, KQ_EVENT,
- THREAD_ABORTSAFE, cont_args->deadline);
+ wait_queue_assert_wait((wait_queue_t)kq->kq_wqs,
+ KQ_EVENT, THREAD_ABORTSAFE, cont_args->deadline);
kq->kq_state |= KQ_SLEEP;
kqunlock(kq);
thread_block_parameter(kqueue_scan_continue, kq);
kqunlock(kq);
break;
case THREAD_TIMED_OUT:
- error = EWOULDBLOCK;
+ error = EWOULDBLOCK;
break;
case THREAD_INTERRUPTED:
error = EINTR;
break;
default:
- panic("kevent_scan_cont() - invalid wait_result (%d)", wait_result);
+ panic("%s: - invalid wait_result (%d)", __func__,
+ wait_result);
error = 0;
}
-
+
/* call the continuation with the results */
assert(cont_args->cont != NULL);
(cont_args->cont)(kq, cont_args->data, error);
*/
int
-kqueue_scan(struct kqueue *kq,
+kqueue_scan(struct kqueue *kq,
kevent_callback_t callback,
kqueue_continue_t continuation,
void *data,
/*
* Make a pass through the kq to find events already
- * triggered.
+ * triggered.
*/
kqlock(kq);
error = kqueue_process(kq, callback, data, &count, p);
/* convert the timeout to a deadline once */
if (atvp->tv_sec || atvp->tv_usec) {
uint64_t now;
-
+
clock_get_uptime(&now);
nanoseconds_to_absolutetime((uint64_t)atvp->tv_sec * NSEC_PER_SEC +
- atvp->tv_usec * NSEC_PER_USEC,
+ atvp->tv_usec * (long)NSEC_PER_USEC,
&deadline);
if (now >= deadline) {
/* non-blocking call */
if (continuation) {
uthread_t ut = (uthread_t)get_bsdthread_info(current_thread());
struct _kqueue_scan *cont_args = &ut->uu_kevent.ss_kqueue_scan;
-
+
cont_args->call = callback;
cont_args->cont = continuation;
cont_args->deadline = deadline;
}
/* go ahead and wait */
- wait_queue_assert_wait((wait_queue_t)kq->kq_wqs, KQ_EVENT, THREAD_ABORTSAFE, deadline);
+ wait_queue_assert_wait_with_leeway((wait_queue_t)kq->kq_wqs,
+ KQ_EVENT, THREAD_ABORTSAFE, TIMEOUT_URGENCY_USER_NORMAL,
+ deadline, 0);
kq->kq_state |= KQ_SLEEP;
kqunlock(kq);
wait_result = thread_block_parameter(cont, kq);
case THREAD_AWAKENED:
continue;
case THREAD_TIMED_OUT:
- return EWOULDBLOCK;
+ return (EWOULDBLOCK);
case THREAD_INTERRUPTED:
- return EINTR;
+ return (EINTR);
default:
- panic("kevent_scan - bad wait_result (%d)",
- wait_result);
+ panic("%s: - bad wait_result (%d)", __func__,
+ wait_result);
error = 0;
}
}
kqunlock(kq);
- return error;
+ return (error);
}
*/
/*ARGSUSED*/
static int
-kqueue_read(__unused struct fileproc *fp,
- __unused struct uio *uio,
- __unused int flags,
- __unused vfs_context_t ctx)
+kqueue_read(__unused struct fileproc *fp,
+ __unused struct uio *uio,
+ __unused int flags,
+ __unused vfs_context_t ctx)
{
return (ENXIO);
}
/*ARGSUSED*/
static int
-kqueue_write(__unused struct fileproc *fp,
- __unused struct uio *uio,
- __unused int flags,
- __unused vfs_context_t ctx)
+kqueue_write(__unused struct fileproc *fp,
+ __unused struct uio *uio,
+ __unused int flags,
+ __unused vfs_context_t ctx)
{
return (ENXIO);
}
/*ARGSUSED*/
static int
-kqueue_ioctl(__unused struct fileproc *fp,
- __unused u_long com,
- __unused caddr_t data,
- __unused vfs_context_t ctx)
+kqueue_ioctl(__unused struct fileproc *fp,
+ __unused u_long com,
+ __unused caddr_t data,
+ __unused vfs_context_t ctx)
{
return (ENOTTY);
}
/*ARGSUSED*/
static int
-kqueue_select(struct fileproc *fp, int which, void *wql, __unused vfs_context_t ctx)
+kqueue_select(struct fileproc *fp, int which, void *wql,
+ __unused vfs_context_t ctx)
{
struct kqueue *kq = (struct kqueue *)fp->f_data;
- int again;
+ struct knote *kn;
+ struct kqtailq inprocessq;
+ int retnum = 0;
if (which != FREAD)
- return 0;
+ return (0);
+
+ TAILQ_INIT(&inprocessq);
kqlock(kq);
- /*
+ /*
* If this is the first pass, link the wait queue associated with the
* the kqueue onto the wait queue set for the select(). Normally we
* use selrecord() for this, but it uses the wait queue within the
* (The select() call will unlink them when it ends).
*/
if (wql != NULL) {
- thread_t cur_act = current_thread();
+ thread_t cur_act = current_thread();
struct uthread * ut = get_bsdthread_info(cur_act);
kq->kq_state |= KQ_SEL;
wait_queue_link_noalloc((wait_queue_t)kq->kq_wqs, ut->uu_wqset,
- (wait_queue_link_t)wql);
+ (wait_queue_link_t)wql);
}
- retry:
- again = 0;
- if (kq->kq_count != 0) {
- struct knote *kn;
+ if (kqueue_begin_processing(kq) == -1) {
+ kqunlock(kq);
+ return (0);
+ }
+ if (kq->kq_count != 0) {
/*
* there is something queued - but it might be a
* KN_STAYQUEUED knote, which may or may not have
* list of knotes to see, and peek at the stay-
* queued ones to be really sure.
*/
- TAILQ_FOREACH(kn, &kq->kq_head, kn_tqe) {
- int retnum = 0;
- if ((kn->kn_status & KN_STAYQUEUED) == 0 ||
- (retnum = kn->kn_fop->f_peek(kn)) > 0) {
- kqunlock(kq);
- return 1;
+ while ((kn = (struct knote *)TAILQ_FIRST(&kq->kq_head)) != NULL) {
+ if ((kn->kn_status & KN_STAYQUEUED) == 0) {
+ retnum = 1;
+ goto out;
+ }
+
+ TAILQ_REMOVE(&kq->kq_head, kn, kn_tqe);
+ TAILQ_INSERT_TAIL(&inprocessq, kn, kn_tqe);
+
+ if (kqlock2knoteuse(kq, kn)) {
+ unsigned peek;
+
+ peek = kn->kn_fop->f_peek(kn);
+ if (knoteuse2kqlock(kq, kn)) {
+ if (peek > 0) {
+ retnum = 1;
+ goto out;
+ }
+ } else {
+ retnum = 0;
+ }
}
- if (retnum < 0)
- again++;
}
}
- /*
- * If we stumbled across a knote that couldn't be peeked at,
- * we have to drop the kq lock and try again.
- */
- if (again > 0) {
- kqunlock(kq);
- mutex_pause(0);
- kqlock(kq);
- goto retry;
+out:
+ /* Return knotes to active queue */
+ while ((kn = TAILQ_FIRST(&inprocessq)) != NULL) {
+ TAILQ_REMOVE(&inprocessq, kn, kn_tqe);
+ kn->kn_tq = &kq->kq_head;
+ TAILQ_INSERT_TAIL(&kq->kq_head, kn, kn_tqe);
}
+ kqueue_end_processing(kq);
kqunlock(kq);
- return 0;
+ return (retnum);
}
/*
*/
kqlock(parentkq);
- if (parentkq->kq_level > 0 &&
+ if (parentkq->kq_level > 0 &&
parentkq->kq_level < kq->kq_level)
{
kqunlock(parentkq);
kqlock(kq);
kqueue_wakeup(kq, 1);
kqunlock(kq);
- return 0;
+ return (0);
}
/*ARGSUSED*/
int
-kqueue_stat(struct fileproc *fp, void *ub, int isstat64, __unused vfs_context_t ctx)
+kqueue_stat(struct kqueue *kq, void *ub, int isstat64, proc_t p)
{
-
- struct kqueue *kq = (struct kqueue *)fp->f_data;
+ kqlock(kq);
if (isstat64 != 0) {
struct stat64 *sb64 = (struct stat64 *)ub;
if (kq->kq_state & KQ_KEV64)
sb64->st_blksize = sizeof(struct kevent64_s);
else
- sb64->st_blksize = sizeof(struct kevent);
+ sb64->st_blksize = IS_64BIT_PROCESS(p) ? sizeof(struct user64_kevent) : sizeof(struct user32_kevent);
sb64->st_mode = S_IFIFO;
} else {
struct stat *sb = (struct stat *)ub;
if (kq->kq_state & KQ_KEV64)
sb->st_blksize = sizeof(struct kevent64_s);
else
- sb->st_blksize = sizeof(struct kevent);
+ sb->st_blksize = IS_64BIT_PROCESS(p) ? sizeof(struct user64_kevent) : sizeof(struct user32_kevent);
sb->st_mode = S_IFIFO;
}
-
+ kqunlock(kq);
return (0);
}
{
if ((kq->kq_state & (KQ_SLEEP | KQ_SEL)) != 0 || kq->kq_nprocess > 0) {
kq->kq_state &= ~(KQ_SLEEP | KQ_SEL);
- wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, KQ_EVENT,
- (closed) ? THREAD_INTERRUPTED : THREAD_AWAKENED);
+ wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, KQ_EVENT,
+ (closed) ? THREAD_INTERRUPTED : THREAD_AWAKENED);
}
}
{
int ret = SLIST_EMPTY(list);
SLIST_INSERT_HEAD(list, kn, kn_selnext);
- return ret;
+ return (ret);
}
/*
knote_detach(struct klist *list, struct knote *kn)
{
SLIST_REMOVE(list, kn, knote, kn_selnext);
- return SLIST_EMPTY(list);
+ return (SLIST_EMPTY(list));
}
/*
* For a given knote, link a provided wait queue directly with the kqueue.
- * Wakeups will happen via recursive wait queue support. But nothing will move
+ * Wakeups will happen via recursive wait queue support. But nothing will move
* the knote to the active list at wakeup (nothing calls knote()). Instead,
* we permanently enqueue them here.
*
* kqueue and knote references are held by caller.
+ *
+ * caller provides the wait queue link structure.
*/
int
-knote_link_wait_queue(struct knote *kn, struct wait_queue *wq)
+knote_link_wait_queue(struct knote *kn, struct wait_queue *wq, wait_queue_link_t wql)
{
struct kqueue *kq = kn->kn_kq;
kern_return_t kr;
- kr = wait_queue_link(wq, kq->kq_wqs);
+ kr = wait_queue_link_noalloc(wq, kq->kq_wqs, wql);
if (kr == KERN_SUCCESS) {
- kqlock(kq);
- kn->kn_status |= KN_STAYQUEUED;
- knote_enqueue(kn);
- kqunlock(kq);
- return 0;
+ knote_markstayqueued(kn);
+ return (0);
} else {
- return ENOMEM;
+ return (EINVAL);
}
}
*
* Note that the unlink may have already happened from the other side, so
* ignore any failures to unlink and just remove it from the kqueue list.
+ *
+ * On success, caller is responsible for the link structure
*/
-void
-knote_unlink_wait_queue(struct knote *kn, struct wait_queue *wq)
+int
+knote_unlink_wait_queue(struct knote *kn, struct wait_queue *wq, wait_queue_link_t *wqlp)
{
struct kqueue *kq = kn->kn_kq;
+ kern_return_t kr;
- (void) wait_queue_unlink(wq, kq->kq_wqs);
- kqlock(kq);
- kn->kn_status &= ~KN_STAYQUEUED;
- knote_dequeue(kn);
- kqunlock(kq);
+ kr = wait_queue_unlink_nofree(wq, kq->kq_wqs, wqlp);
+ knote_clearstayqueued(kn);
+ return ((kr != KERN_SUCCESS) ? EINVAL : 0);
}
/*
*
* Essentially an inlined knote_remove & knote_drop
* when we know for sure that the thing is a file
- *
+ *
* Entered with the proc_fd lock already held.
* It returns the same way, but may drop it temporarily.
*/
struct kqueue *kq = kn->kn_kq;
if (kq->kq_p != p)
- panic("knote_fdclose: proc mismatch (kq->kq_p=%p != p=%p)", kq->kq_p, p);
+ panic("%s: proc mismatch (kq->kq_p=%p != p=%p)",
+ __func__, kq->kq_p, p);
kqlock(kq);
proc_fdunlock(p);
kn->kn_fop->f_detach(kn);
knote_drop(kn, p);
}
-
+
proc_fdlock(p);
/* the fd tables may have changed - start over */
/* proc_fdlock held on entry (and exit) */
static int
-knote_fdpattach(struct knote *kn, struct filedesc *fdp, __unused struct proc *p)
+knote_fdpattach(struct knote *kn, struct filedesc *fdp, struct proc *p)
{
struct klist *list = NULL;
if ((u_int)fdp->fd_knlistsize <= kn->kn_id) {
u_int size = 0;
+ if (kn->kn_id >= (uint64_t)p->p_rlimit[RLIMIT_NOFILE].rlim_cur
+ || kn->kn_id >= (uint64_t)maxfiles)
+ return (EINVAL);
+
/* have to grow the fd_knlist */
size = fdp->fd_knlistsize;
while (size <= kn->kn_id)
size += KQEXTENT;
+
+ if (size >= (UINT_MAX/sizeof(struct klist *)))
+ return (EINVAL);
+
MALLOC(list, struct klist *,
- size * sizeof(struct klist *), M_KQUEUE, M_WAITOK);
+ size * sizeof(struct klist *), M_KQUEUE, M_WAITOK);
if (list == NULL)
return (ENOMEM);
-
+
bcopy((caddr_t)fdp->fd_knlist, (caddr_t)list,
- fdp->fd_knlistsize * sizeof(struct klist *));
+ fdp->fd_knlistsize * sizeof(struct klist *));
bzero((caddr_t)list +
- fdp->fd_knlistsize * sizeof(struct klist *),
- (size - fdp->fd_knlistsize) * sizeof(struct klist *));
+ fdp->fd_knlistsize * sizeof(struct klist *),
+ (size - fdp->fd_knlistsize) * sizeof(struct klist *));
FREE(fdp->fd_knlist, M_KQUEUE);
fdp->fd_knlist = list;
fdp->fd_knlistsize = size;
{
struct kqueue *kq = kn->kn_kq;
struct proc *p = kq->kq_p;
- struct filedesc *fdp = p->p_fd;
+ struct filedesc *fdp = p->p_fd;
struct klist *list;
int needswakeup;
proc_fdunlock(p);
if (needswakeup)
- wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, &kn->kn_status, THREAD_AWAKENED);
+ wait_queue_wakeup_all((wait_queue_t)kq->kq_wqs, &kn->kn_status,
+ THREAD_AWAKENED);
if (kn->kn_fop->f_isfd)
fp_drop(p, kn->kn_id, kn->kn_fp, 0);
/* called with kqueue lock held */
static void
knote_deactivate(struct knote *kn)
-{
+{
kn->kn_status &= ~KN_ACTIVE;
knote_dequeue(kn);
}
struct kqtailq *tq = kn->kn_tq;
struct kqueue *kq = kn->kn_kq;
- TAILQ_INSERT_TAIL(tq, kn, kn_tqe);
+ TAILQ_INSERT_TAIL(tq, kn, kn_tqe);
kn->kn_status |= KN_QUEUED;
kq->kq_count++;
}
if ((kn->kn_status & (KN_QUEUED | KN_STAYQUEUED)) == KN_QUEUED) {
struct kqtailq *tq = kn->kn_tq;
- TAILQ_REMOVE(tq, kn, kn_tqe);
+ TAILQ_REMOVE(tq, kn, kn_tqe);
kn->kn_tq = &kq->kq_head;
kn->kn_status &= ~KN_QUEUED;
kq->kq_count--;
void
knote_init(void)
{
- knote_zone = zinit(sizeof(struct knote), 8192*sizeof(struct knote), 8192, "knote zone");
+ knote_zone = zinit(sizeof(struct knote), 8192*sizeof(struct knote),
+ 8192, "knote zone");
/* allocate kq lock group attribute and group */
- kq_lck_grp_attr= lck_grp_attr_alloc_init();
+ kq_lck_grp_attr = lck_grp_attr_alloc_init();
kq_lck_grp = lck_grp_alloc_init("kqueue", kq_lck_grp_attr);
/* Initialize the timer filter lock */
lck_mtx_init(&_filt_timerlock, kq_lck_grp, kq_lck_attr);
+
+#if VM_PRESSURE_EVENTS
+ /* Initialize the vm pressure list lock */
+ vm_pressure_init(kq_lck_grp, kq_lck_attr);
+#endif
+
+#if CONFIG_MEMORYSTATUS
+ /* Initialize the memorystatus list lock */
+ memorystatus_kevent_init(kq_lck_grp, kq_lck_attr);
+#endif
}
SYSINIT(knote, SI_SUB_PSEUDO, SI_ORDER_ANY, knote_init, NULL)
#include <sys/sys_domain.h>
#include <sys/syslog.h>
+#ifndef ROUNDUP64
+#define ROUNDUP64(x) P2ROUNDUP((x), sizeof (u_int64_t))
+#endif
+
+#ifndef ADVANCE64
+#define ADVANCE64(p, n) (void*)((char *)(p) + ROUNDUP64(n))
+#endif
+
+static lck_grp_attr_t *kev_lck_grp_attr;
+static lck_attr_t *kev_lck_attr;
+static lck_grp_t *kev_lck_grp;
+static decl_lck_rw_data(,kev_lck_data);
+static lck_rw_t *kev_rwlock = &kev_lck_data;
static int kev_attach(struct socket *so, int proto, struct proc *p);
static int kev_detach(struct socket *so);
-static int kev_control(struct socket *so, u_long cmd, caddr_t data, struct ifnet *ifp, struct proc *p);
-
-struct pr_usrreqs event_usrreqs = {
- pru_abort_notsupp, pru_accept_notsupp, kev_attach, pru_bind_notsupp, pru_connect_notsupp,
- pru_connect2_notsupp, kev_control, kev_detach, pru_disconnect_notsupp,
- pru_listen_notsupp, pru_peeraddr_notsupp, pru_rcvd_notsupp, pru_rcvoob_notsupp,
- pru_send_notsupp, pru_sense_null, pru_shutdown_notsupp, pru_sockaddr_notsupp,
- pru_sosend_notsupp, soreceive, pru_sopoll_notsupp
+static int kev_control(struct socket *so, u_long cmd, caddr_t data,
+ struct ifnet *ifp, struct proc *p);
+static lck_mtx_t * event_getlock(struct socket *, int);
+static int event_lock(struct socket *, int, void *);
+static int event_unlock(struct socket *, int, void *);
+
+static int event_sofreelastref(struct socket *);
+static void kev_delete(struct kern_event_pcb *);
+
+static struct pr_usrreqs event_usrreqs = {
+ .pru_attach = kev_attach,
+ .pru_control = kev_control,
+ .pru_detach = kev_detach,
+ .pru_soreceive = soreceive,
};
-struct protosw eventsw[] = {
- {
- .pr_type = SOCK_RAW,
- .pr_domain = &systemdomain,
- .pr_protocol = SYSPROTO_EVENT,
- .pr_flags = PR_ATOMIC,
- .pr_usrreqs = &event_usrreqs,
- }
+static struct protosw eventsw[] = {
+{
+ .pr_type = SOCK_RAW,
+ .pr_protocol = SYSPROTO_EVENT,
+ .pr_flags = PR_ATOMIC,
+ .pr_usrreqs = &event_usrreqs,
+ .pr_lock = event_lock,
+ .pr_unlock = event_unlock,
+ .pr_getlock = event_getlock,
+}
};
+__private_extern__ int kevt_getstat SYSCTL_HANDLER_ARGS;
+__private_extern__ int kevt_pcblist SYSCTL_HANDLER_ARGS;
+
+SYSCTL_NODE(_net_systm, OID_AUTO, kevt,
+ CTLFLAG_RW|CTLFLAG_LOCKED, 0, "Kernel event family");
+
+struct kevtstat kevtstat;
+SYSCTL_PROC(_net_systm_kevt, OID_AUTO, stats,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+ kevt_getstat, "S,kevtstat", "");
+
+SYSCTL_PROC(_net_systm_kevt, OID_AUTO, pcblist,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+ kevt_pcblist, "S,xkevtpcb", "");
+
+static lck_mtx_t *
+event_getlock(struct socket *so, int locktype)
+{
+#pragma unused(locktype)
+ struct kern_event_pcb *ev_pcb = (struct kern_event_pcb *)so->so_pcb;
+
+ if (so->so_pcb != NULL) {
+ if (so->so_usecount < 0)
+ panic("%s: so=%p usecount=%d lrh= %s\n", __func__,
+ so, so->so_usecount, solockhistory_nr(so));
+ /* NOTREACHED */
+ } else {
+ panic("%s: so=%p NULL NO so_pcb %s\n", __func__,
+ so, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+ return (&ev_pcb->evp_mtx);
+}
+
+static int
+event_lock(struct socket *so, int refcount, void *lr)
+{
+ void *lr_saved;
+
+ if (lr == NULL)
+ lr_saved = __builtin_return_address(0);
+ else
+ lr_saved = lr;
+
+ if (so->so_pcb != NULL) {
+ lck_mtx_lock(&((struct kern_event_pcb *)so->so_pcb)->evp_mtx);
+ } else {
+ panic("%s: so=%p NO PCB! lr=%p lrh= %s\n", __func__,
+ so, lr_saved, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+
+ if (so->so_usecount < 0) {
+ panic("%s: so=%p so_pcb=%p lr=%p ref=%d lrh= %s\n", __func__,
+ so, so->so_pcb, lr_saved, so->so_usecount,
+ solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+
+ if (refcount)
+ so->so_usecount++;
+
+ so->lock_lr[so->next_lock_lr] = lr_saved;
+ so->next_lock_lr = (so->next_lock_lr+1) % SO_LCKDBG_MAX;
+ return (0);
+}
+
+static int
+event_unlock(struct socket *so, int refcount, void *lr)
+{
+ void *lr_saved;
+ lck_mtx_t *mutex_held;
+
+ if (lr == NULL)
+ lr_saved = __builtin_return_address(0);
+ else
+ lr_saved = lr;
+
+ if (refcount)
+ so->so_usecount--;
+
+ if (so->so_usecount < 0) {
+ panic("%s: so=%p usecount=%d lrh= %s\n", __func__,
+ so, so->so_usecount, solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+ if (so->so_pcb == NULL) {
+ panic("%s: so=%p NO PCB usecount=%d lr=%p lrh= %s\n", __func__,
+ so, so->so_usecount, (void *)lr_saved,
+ solockhistory_nr(so));
+ /* NOTREACHED */
+ }
+ mutex_held = (&((struct kern_event_pcb *)so->so_pcb)->evp_mtx);
+
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+ so->unlock_lr[so->next_unlock_lr] = lr_saved;
+ so->next_unlock_lr = (so->next_unlock_lr+1) % SO_LCKDBG_MAX;
+
+ if (so->so_usecount == 0) {
+ VERIFY(so->so_flags & SOF_PCBCLEARING);
+ event_sofreelastref(so);
+ } else {
+ lck_mtx_unlock(mutex_held);
+ }
+
+ return (0);
+}
+
+static int
+event_sofreelastref(struct socket *so)
+{
+ struct kern_event_pcb *ev_pcb = (struct kern_event_pcb *)so->so_pcb;
+
+ lck_mtx_assert(&(ev_pcb->evp_mtx), LCK_MTX_ASSERT_OWNED);
+
+ so->so_pcb = NULL;
+
+ /*
+ * Disable upcall in the event another thread is in kev_post_msg()
+ * appending record to the receive socket buffer, since sbwakeup()
+ * may release the socket lock otherwise.
+ */
+ so->so_rcv.sb_flags &= ~SB_UPCALL;
+ so->so_snd.sb_flags &= ~SB_UPCALL;
+ so->so_event = sonullevent;
+ lck_mtx_unlock(&(ev_pcb->evp_mtx));
+
+ lck_mtx_assert(&(ev_pcb->evp_mtx), LCK_MTX_ASSERT_NOTOWNED);
+ lck_rw_lock_exclusive(kev_rwlock);
+ LIST_REMOVE(ev_pcb, evp_link);
+ kevtstat.kes_pcbcount--;
+ kevtstat.kes_gencnt++;
+ lck_rw_done(kev_rwlock);
+ kev_delete(ev_pcb);
+
+ sofreelastref(so, 1);
+ return (0);
+}
+
+static int event_proto_count = (sizeof (eventsw) / sizeof (struct protosw));
+
static
struct kern_event_head kern_event_head;
static u_int32_t static_event_id = 0;
-struct domain *sysdom = &systemdomain;
-static lck_mtx_t *sys_mtx;
+
+#define EVPCB_ZONE_MAX 65536
+#define EVPCB_ZONE_NAME "kerneventpcb"
+static struct zone *ev_pcb_zone;
/*
- * Install the protosw's for the NKE manager. Invoked at
- * extension load time
+ * Install the protosw's for the NKE manager. Invoked at extension load time
*/
-int
-kern_event_init(void)
+void
+kern_event_init(struct domain *dp)
{
- int retval;
+ struct protosw *pr;
+ int i;
+
+ VERIFY(!(dp->dom_flags & DOM_INITIALIZED));
+ VERIFY(dp == systemdomain);
+
+ kev_lck_grp_attr = lck_grp_attr_alloc_init();
+ if (kev_lck_grp_attr == NULL) {
+ panic("%s: lck_grp_attr_alloc_init failed\n", __func__);
+ /* NOTREACHED */
+ }
+
+ kev_lck_grp = lck_grp_alloc_init("Kernel Event Protocol",
+ kev_lck_grp_attr);
+ if (kev_lck_grp == NULL) {
+ panic("%s: lck_grp_alloc_init failed\n", __func__);
+ /* NOTREACHED */
+ }
+
+ kev_lck_attr = lck_attr_alloc_init();
+ if (kev_lck_attr == NULL) {
+ panic("%s: lck_attr_alloc_init failed\n", __func__);
+ /* NOTREACHED */
+ }
+
+ lck_rw_init(kev_rwlock, kev_lck_grp, kev_lck_attr);
+ if (kev_rwlock == NULL) {
+ panic("%s: lck_mtx_alloc_init failed\n", __func__);
+ /* NOTREACHED */
+ }
+
+ for (i = 0, pr = &eventsw[0]; i < event_proto_count; i++, pr++)
+ net_add_proto(pr, dp, 1);
- if ((retval = net_add_proto(eventsw, &systemdomain)) != 0) {
- log(LOG_WARNING, "Can't install kernel events protocol (%d)\n", retval);
- return(retval);
+ ev_pcb_zone = zinit(sizeof(struct kern_event_pcb),
+ EVPCB_ZONE_MAX * sizeof(struct kern_event_pcb), 0, EVPCB_ZONE_NAME);
+ if (ev_pcb_zone == NULL) {
+ panic("%s: failed allocating ev_pcb_zone", __func__);
+ /* NOTREACHED */
}
-
- /*
- * Use the domain mutex for all system event sockets
- */
- sys_mtx = sysdom->dom_mtx;
-
- return(KERN_SUCCESS);
+ zone_change(ev_pcb_zone, Z_EXPAND, TRUE);
+ zone_change(ev_pcb_zone, Z_CALLERACCT, TRUE);
}
static int
kev_attach(struct socket *so, __unused int proto, __unused struct proc *p)
{
- int error;
- struct kern_event_pcb *ev_pcb;
+ int error = 0;
+ struct kern_event_pcb *ev_pcb;
- error = soreserve(so, KEV_SNDSPACE, KEV_RECVSPACE);
- if (error)
- return error;
+ error = soreserve(so, KEV_SNDSPACE, KEV_RECVSPACE);
+ if (error != 0)
+ return (error);
- MALLOC(ev_pcb, struct kern_event_pcb *, sizeof(struct kern_event_pcb), M_PCB, M_WAITOK);
- if (ev_pcb == 0)
- return ENOBUFS;
+ if ((ev_pcb = (struct kern_event_pcb *)zalloc(ev_pcb_zone)) == NULL) {
+ return (ENOBUFS);
+ }
+ bzero(ev_pcb, sizeof(struct kern_event_pcb));
+ lck_mtx_init(&ev_pcb->evp_mtx, kev_lck_grp, kev_lck_attr);
- ev_pcb->ev_socket = so;
- ev_pcb->vendor_code_filter = 0xffffffff;
+ ev_pcb->evp_socket = so;
+ ev_pcb->evp_vendor_code_filter = 0xffffffff;
- so->so_pcb = (caddr_t) ev_pcb;
- lck_mtx_lock(sys_mtx);
- LIST_INSERT_HEAD(&kern_event_head, ev_pcb, ev_link);
- lck_mtx_unlock(sys_mtx);
+ so->so_pcb = (caddr_t) ev_pcb;
+ lck_rw_lock_exclusive(kev_rwlock);
+ LIST_INSERT_HEAD(&kern_event_head, ev_pcb, evp_link);
+ kevtstat.kes_pcbcount++;
+ kevtstat.kes_gencnt++;
+ lck_rw_done(kev_rwlock);
- return 0;
+ return (error);
}
+static void
+kev_delete(struct kern_event_pcb *ev_pcb)
+{
+ VERIFY(ev_pcb != NULL);
+ lck_mtx_destroy(&ev_pcb->evp_mtx, kev_lck_grp);
+ zfree(ev_pcb_zone, ev_pcb);
+}
static int
kev_detach(struct socket *so)
{
- struct kern_event_pcb *ev_pcb = (struct kern_event_pcb *) so->so_pcb;
+ struct kern_event_pcb *ev_pcb = (struct kern_event_pcb *) so->so_pcb;
- if (ev_pcb != 0) {
- LIST_REMOVE(ev_pcb, ev_link);
- FREE(ev_pcb, M_PCB);
- so->so_pcb = 0;
+ if (ev_pcb != NULL) {
+ soisdisconnected(so);
so->so_flags |= SOF_PCBCLEARING;
- }
+ }
- return 0;
+ return (0);
}
/*
* For now, kev_vendor_code and mbuf_tags use the same
* mechanism.
*/
-
errno_t kev_vendor_code_find(
const char *string,
u_int32_t *out_vendor_code)
{
if (strlen(string) >= KEV_VENDOR_CODE_MAX_STR_LEN) {
- return EINVAL;
+ return (EINVAL);
}
- return net_str_id_find_internal(string, out_vendor_code, NSI_VENDOR_CODE, 1);
+ return (net_str_id_find_internal(string, out_vendor_code,
+ NSI_VENDOR_CODE, 1));
}
-errno_t kev_msg_post(struct kev_msg *event_msg)
+errno_t
+kev_msg_post(struct kev_msg *event_msg)
{
- mbuf_tag_id_t min_vendor, max_vendor;
-
+ mbuf_tag_id_t min_vendor, max_vendor;
+
net_str_id_first_last(&min_vendor, &max_vendor, NSI_VENDOR_CODE);
-
+
if (event_msg == NULL)
- return EINVAL;
-
- /* Limit third parties to posting events for registered vendor codes only */
+ return (EINVAL);
+
+ /*
+ * Limit third parties to posting events for registered vendor codes
+ * only
+ */
if (event_msg->vendor_code < min_vendor ||
- event_msg->vendor_code > max_vendor)
- {
- return EINVAL;
+ event_msg->vendor_code > max_vendor) {
+ OSIncrementAtomic64((SInt64 *)&kevtstat.kes_badvendor);
+ return (EINVAL);
}
-
- return kev_post_msg(event_msg);
+ return (kev_post_msg(event_msg));
}
-
-int kev_post_msg(struct kev_msg *event_msg)
+int
+kev_post_msg(struct kev_msg *event_msg)
{
- struct mbuf *m, *m2;
- struct kern_event_pcb *ev_pcb;
- struct kern_event_msg *ev;
- char *tmp;
- u_int32_t total_size;
- int i;
+ struct mbuf *m, *m2;
+ struct kern_event_pcb *ev_pcb;
+ struct kern_event_msg *ev;
+ char *tmp;
+ u_int32_t total_size;
+ int i;
/* Verify the message is small enough to fit in one mbuf w/o cluster */
total_size = KEV_MSG_HEADER_SIZE;
-
+
for (i = 0; i < 5; i++) {
if (event_msg->dv[i].data_length == 0)
break;
total_size += event_msg->dv[i].data_length;
}
-
+
if (total_size > MLEN) {
- return EMSGSIZE;
- }
-
- m = m_get(M_DONTWAIT, MT_DATA);
- if (m == 0)
- return ENOBUFS;
-
- ev = mtod(m, struct kern_event_msg *);
- total_size = KEV_MSG_HEADER_SIZE;
-
- tmp = (char *) &ev->event_data[0];
- for (i = 0; i < 5; i++) {
- if (event_msg->dv[i].data_length == 0)
- break;
-
- total_size += event_msg->dv[i].data_length;
- bcopy(event_msg->dv[i].data_ptr, tmp,
- event_msg->dv[i].data_length);
- tmp += event_msg->dv[i].data_length;
- }
-
- ev->id = ++static_event_id;
- ev->total_size = total_size;
- ev->vendor_code = event_msg->vendor_code;
- ev->kev_class = event_msg->kev_class;
- ev->kev_subclass = event_msg->kev_subclass;
- ev->event_code = event_msg->event_code;
-
- m->m_len = total_size;
- lck_mtx_lock(sys_mtx);
- for (ev_pcb = LIST_FIRST(&kern_event_head);
- ev_pcb;
- ev_pcb = LIST_NEXT(ev_pcb, ev_link)) {
-
- if (ev_pcb->vendor_code_filter != KEV_ANY_VENDOR) {
- if (ev_pcb->vendor_code_filter != ev->vendor_code)
- continue;
-
- if (ev_pcb->class_filter != KEV_ANY_CLASS) {
- if (ev_pcb->class_filter != ev->kev_class)
- continue;
-
- if ((ev_pcb->subclass_filter != KEV_ANY_SUBCLASS) &&
- (ev_pcb->subclass_filter != ev->kev_subclass))
- continue;
- }
- }
-
- m2 = m_copym(m, 0, m->m_len, M_NOWAIT);
- if (m2 == 0) {
- m_free(m);
- lck_mtx_unlock(sys_mtx);
- return ENOBUFS;
- }
- /* the socket is already locked because we hold the sys_mtx here */
- if (sbappendrecord(&ev_pcb->ev_socket->so_rcv, m2))
- sorwakeup(ev_pcb->ev_socket);
- }
-
- m_free(m);
- lck_mtx_unlock(sys_mtx);
- return 0;
+ OSIncrementAtomic64((SInt64 *)&kevtstat.kes_toobig);
+ return (EMSGSIZE);
+ }
+
+ m = m_get(M_DONTWAIT, MT_DATA);
+ if (m == 0) {
+ OSIncrementAtomic64((SInt64 *)&kevtstat.kes_nomem);
+ return (ENOMEM);
+ }
+ ev = mtod(m, struct kern_event_msg *);
+ total_size = KEV_MSG_HEADER_SIZE;
+
+ tmp = (char *) &ev->event_data[0];
+ for (i = 0; i < 5; i++) {
+ if (event_msg->dv[i].data_length == 0)
+ break;
+
+ total_size += event_msg->dv[i].data_length;
+ bcopy(event_msg->dv[i].data_ptr, tmp,
+ event_msg->dv[i].data_length);
+ tmp += event_msg->dv[i].data_length;
+ }
+
+ ev->id = ++static_event_id;
+ ev->total_size = total_size;
+ ev->vendor_code = event_msg->vendor_code;
+ ev->kev_class = event_msg->kev_class;
+ ev->kev_subclass = event_msg->kev_subclass;
+ ev->event_code = event_msg->event_code;
+
+ m->m_len = total_size;
+ lck_rw_lock_shared(kev_rwlock);
+ for (ev_pcb = LIST_FIRST(&kern_event_head);
+ ev_pcb;
+ ev_pcb = LIST_NEXT(ev_pcb, evp_link)) {
+ lck_mtx_lock(&ev_pcb->evp_mtx);
+ if (ev_pcb->evp_socket->so_pcb == NULL) {
+ lck_mtx_unlock(&ev_pcb->evp_mtx);
+ continue;
+ }
+ if (ev_pcb->evp_vendor_code_filter != KEV_ANY_VENDOR) {
+ if (ev_pcb->evp_vendor_code_filter != ev->vendor_code) {
+ lck_mtx_unlock(&ev_pcb->evp_mtx);
+ continue;
+ }
+
+ if (ev_pcb->evp_class_filter != KEV_ANY_CLASS) {
+ if (ev_pcb->evp_class_filter != ev->kev_class) {
+ lck_mtx_unlock(&ev_pcb->evp_mtx);
+ continue;
+ }
+
+ if ((ev_pcb->evp_subclass_filter !=
+ KEV_ANY_SUBCLASS) &&
+ (ev_pcb->evp_subclass_filter !=
+ ev->kev_subclass)) {
+ lck_mtx_unlock(&ev_pcb->evp_mtx);
+ continue;
+ }
+ }
+ }
+
+ m2 = m_copym(m, 0, m->m_len, M_NOWAIT);
+ if (m2 == 0) {
+ OSIncrementAtomic64((SInt64 *)&kevtstat.kes_nomem);
+ m_free(m);
+ lck_mtx_unlock(&ev_pcb->evp_mtx);
+ lck_rw_done(kev_rwlock);
+ return (ENOMEM);
+ }
+ if (sbappendrecord(&ev_pcb->evp_socket->so_rcv, m2)) {
+ /*
+ * We use "m" for the socket stats as it would be
+ * unsafe to use "m2"
+ */
+ so_inc_recv_data_stat(ev_pcb->evp_socket,
+ 1, m->m_len, SO_TC_BE);
+
+ sorwakeup(ev_pcb->evp_socket);
+ OSIncrementAtomic64((SInt64 *)&kevtstat.kes_posted);
+ } else {
+ OSIncrementAtomic64((SInt64 *)&kevtstat.kes_fullsock);
+ }
+ lck_mtx_unlock(&ev_pcb->evp_mtx);
+ }
+ m_free(m);
+ lck_rw_done(kev_rwlock);
+
+ return (0);
}
static int
-kev_control(struct socket *so,
- u_long cmd,
- caddr_t data,
- __unused struct ifnet *ifp,
- __unused struct proc *p)
+kev_control(struct socket *so,
+ u_long cmd,
+ caddr_t data,
+ __unused struct ifnet *ifp,
+ __unused struct proc *p)
{
struct kev_request *kev_req = (struct kev_request *) data;
struct kern_event_pcb *ev_pcb;
struct kev_vendor_code *kev_vendor;
u_int32_t *id_value = (u_int32_t *) data;
-
-
+
switch (cmd) {
-
case SIOCGKEVID:
*id_value = static_event_id;
break;
-
case SIOCSKEVFILT:
ev_pcb = (struct kern_event_pcb *) so->so_pcb;
- ev_pcb->vendor_code_filter = kev_req->vendor_code;
- ev_pcb->class_filter = kev_req->kev_class;
- ev_pcb->subclass_filter = kev_req->kev_subclass;
+ ev_pcb->evp_vendor_code_filter = kev_req->vendor_code;
+ ev_pcb->evp_class_filter = kev_req->kev_class;
+ ev_pcb->evp_subclass_filter = kev_req->kev_subclass;
break;
-
case SIOCGKEVFILT:
ev_pcb = (struct kern_event_pcb *) so->so_pcb;
- kev_req->vendor_code = ev_pcb->vendor_code_filter;
- kev_req->kev_class = ev_pcb->class_filter;
- kev_req->kev_subclass = ev_pcb->subclass_filter;
+ kev_req->vendor_code = ev_pcb->evp_vendor_code_filter;
+ kev_req->kev_class = ev_pcb->evp_class_filter;
+ kev_req->kev_subclass = ev_pcb->evp_subclass_filter;
break;
-
case SIOCGKEVVENDOR:
- kev_vendor = (struct kev_vendor_code*)data;
-
+ kev_vendor = (struct kev_vendor_code *)data;
/* Make sure string is NULL terminated */
kev_vendor->vendor_string[KEV_VENDOR_CODE_MAX_STR_LEN-1] = 0;
-
- return net_str_id_find_internal(kev_vendor->vendor_string,
- &kev_vendor->vendor_code, NSI_VENDOR_CODE, 0);
-
+ return (net_str_id_find_internal(kev_vendor->vendor_string,
+ &kev_vendor->vendor_code, NSI_VENDOR_CODE, 0));
default:
- return ENOTSUP;
+ return (ENOTSUP);
+ }
+
+ return (0);
+}
+
+int
+kevt_getstat SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ int error = 0;
+
+ lck_rw_lock_shared(kev_rwlock);
+
+ if (req->newptr != USER_ADDR_NULL) {
+ error = EPERM;
+ goto done;
+ }
+ if (req->oldptr == USER_ADDR_NULL) {
+ req->oldidx = sizeof(struct kevtstat);
+ goto done;
+ }
+
+ error = SYSCTL_OUT(req, &kevtstat,
+ MIN(sizeof(struct kevtstat), req->oldlen));
+done:
+ lck_rw_done(kev_rwlock);
+
+ return (error);
+}
+
+__private_extern__ int
+kevt_pcblist SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ int error = 0;
+ int n, i;
+ struct xsystmgen xsg;
+ void *buf = NULL;
+ size_t item_size = ROUNDUP64(sizeof (struct xkevtpcb)) +
+ ROUNDUP64(sizeof (struct xsocket_n)) +
+ 2 * ROUNDUP64(sizeof (struct xsockbuf_n)) +
+ ROUNDUP64(sizeof (struct xsockstat_n));
+ struct kern_event_pcb *ev_pcb;
+
+ buf = _MALLOC(item_size, M_TEMP, M_WAITOK | M_ZERO);
+ if (buf == NULL)
+ return (ENOMEM);
+
+ lck_rw_lock_shared(kev_rwlock);
+
+ n = kevtstat.kes_pcbcount;
+
+ if (req->oldptr == USER_ADDR_NULL) {
+ req->oldidx = (n + n/8) * item_size;
+ goto done;
+ }
+ if (req->newptr != USER_ADDR_NULL) {
+ error = EPERM;
+ goto done;
}
-
- return 0;
+ bzero(&xsg, sizeof (xsg));
+ xsg.xg_len = sizeof (xsg);
+ xsg.xg_count = n;
+ xsg.xg_gen = kevtstat.kes_gencnt;
+ xsg.xg_sogen = so_gencnt;
+ error = SYSCTL_OUT(req, &xsg, sizeof (xsg));
+ if (error) {
+ goto done;
+ }
+ /*
+ * We are done if there is no pcb
+ */
+ if (n == 0) {
+ goto done;
+ }
+
+ i = 0;
+ for (i = 0, ev_pcb = LIST_FIRST(&kern_event_head);
+ i < n && ev_pcb != NULL;
+ i++, ev_pcb = LIST_NEXT(ev_pcb, evp_link)) {
+ struct xkevtpcb *xk = (struct xkevtpcb *)buf;
+ struct xsocket_n *xso = (struct xsocket_n *)
+ ADVANCE64(xk, sizeof (*xk));
+ struct xsockbuf_n *xsbrcv = (struct xsockbuf_n *)
+ ADVANCE64(xso, sizeof (*xso));
+ struct xsockbuf_n *xsbsnd = (struct xsockbuf_n *)
+ ADVANCE64(xsbrcv, sizeof (*xsbrcv));
+ struct xsockstat_n *xsostats = (struct xsockstat_n *)
+ ADVANCE64(xsbsnd, sizeof (*xsbsnd));
+
+ bzero(buf, item_size);
+
+ lck_mtx_lock(&ev_pcb->evp_mtx);
+
+ xk->kep_len = sizeof(struct xkevtpcb);
+ xk->kep_kind = XSO_EVT;
+ xk->kep_evtpcb = (uint64_t)VM_KERNEL_ADDRPERM(ev_pcb);
+ xk->kep_vendor_code_filter = ev_pcb->evp_vendor_code_filter;
+ xk->kep_class_filter = ev_pcb->evp_class_filter;
+ xk->kep_subclass_filter = ev_pcb->evp_subclass_filter;
+
+ sotoxsocket_n(ev_pcb->evp_socket, xso);
+ sbtoxsockbuf_n(ev_pcb->evp_socket ?
+ &ev_pcb->evp_socket->so_rcv : NULL, xsbrcv);
+ sbtoxsockbuf_n(ev_pcb->evp_socket ?
+ &ev_pcb->evp_socket->so_snd : NULL, xsbsnd);
+ sbtoxsockstat_n(ev_pcb->evp_socket, xsostats);
+
+ lck_mtx_unlock(&ev_pcb->evp_mtx);
+
+ error = SYSCTL_OUT(req, buf, item_size);
+ }
+
+ if (error == 0) {
+ /*
+ * Give the user an updated idea of our state.
+ * If the generation differs from what we told
+ * her before, she knows that something happened
+ * while we were processing this request, and it
+ * might be necessary to retry.
+ */
+ bzero(&xsg, sizeof (xsg));
+ xsg.xg_len = sizeof (xsg);
+ xsg.xg_count = n;
+ xsg.xg_gen = kevtstat.kes_gencnt;
+ xsg.xg_sogen = so_gencnt;
+ error = SYSCTL_OUT(req, &xsg, sizeof (xsg));
+ if (error) {
+ goto done;
+ }
+ }
+
+done:
+ lck_rw_done(kev_rwlock);
+
+ return (error);
}
#endif /* SOCKETS */
{
struct vinfo_stat * st;
- /* No need for the funnel as fd is kept alive */
-
st = &kinfo->kq_stat;
st->vst_size = kq->kq_count;
if (kq->kq_state & KQ_SLEEP)
kinfo->kq_state |= PROC_KQUEUE_SLEEP;
- return(0);
+ return (0);
}
+
+void
+knote_markstayqueued(struct knote *kn)
+{
+ kqlock(kn->kn_kq);
+ kn->kn_status |= KN_STAYQUEUED;
+ knote_enqueue(kn);
+ kqunlock(kn->kn_kq);
+}
+
+void
+knote_clearstayqueued(struct knote *kn)
+{
+ kqlock(kn->kn_kq);
+ kn->kn_status &= ~KN_STAYQUEUED;
+ knote_dequeue(kn);
+ kqunlock(kn->kn_kq);
+}
projects / apple / xnu.git / blobdiff