mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
a7d41e9460
Signed-off-by: Gordon Ross <gordon.w.ross@gmail.com> Reviewed-by: Jeremy Allison <jra@samba.org> Reviewed-by: Michael Adam <obnox@samba.org>
787 lines
19 KiB
C
787 lines
19 KiB
C
/*
|
|
Unix SMB/CIFS implementation.
|
|
|
|
Main select loop and event handling - Solaris port implementation.
|
|
Losely based on the Linux epoll backend.
|
|
|
|
Copyright (C) Jeremy Allison 2013
|
|
|
|
** NOTE! The following LGPL license applies to the tevent
|
|
** library. This does NOT imply that all of Samba is released
|
|
** under the LGPL
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 3 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "replace.h"
|
|
#include "system/filesys.h"
|
|
#include "system/select.h"
|
|
#include "tevent.h"
|
|
#include "tevent_internal.h"
|
|
#include "tevent_util.h"
|
|
|
|
struct port_associate_vals {
|
|
struct port_associate_vals *prev, *next;
|
|
struct port_event_context *port_ev;
|
|
int events;
|
|
struct tevent_fd *fde;
|
|
bool associated_event;
|
|
};
|
|
|
|
struct port_event_context {
|
|
/* a pointer back to the generic event_context */
|
|
struct tevent_context *ev;
|
|
|
|
/* This is the handle from port_create */
|
|
int port_fd;
|
|
|
|
pid_t pid;
|
|
|
|
/* List of associations. */
|
|
struct port_associate_vals *po_vals;
|
|
};
|
|
|
|
#define PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION (1<<0)
|
|
#define PORT_ADDITIONAL_FD_FLAG_REPORT_ERROR (1<<1)
|
|
#define PORT_ADDITIONAL_FD_FLAG_GOT_ERROR (1<<2)
|
|
#define PORT_ADDITIONAL_FD_FLAG_HAS_MPX (1<<3)
|
|
|
|
/*
|
|
Map from TEVENT_FD_* to POLLIN/POLLOUT
|
|
*/
|
|
static int port_map_flags(uint16_t flags)
|
|
{
|
|
int ret = 0;
|
|
if (flags & TEVENT_FD_READ) ret |= (POLLIN | POLLERR | POLLHUP);
|
|
if (flags & TEVENT_FD_WRITE) ret |= (POLLOUT | POLLERR | POLLHUP);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
Free the port fd
|
|
*/
|
|
static int port_ctx_destructor(struct port_event_context *port_ev)
|
|
{
|
|
close(port_ev->port_fd);
|
|
port_ev->port_fd = -1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
Init the port fd
|
|
*/
|
|
static int port_init_ctx(struct port_event_context *port_ev)
|
|
{
|
|
port_ev->port_fd = port_create();
|
|
if (port_ev->port_fd == -1) {
|
|
tevent_debug(port_ev->ev, TEVENT_DEBUG_FATAL,
|
|
"Failed to create port handle.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!ev_set_close_on_exec(port_ev->port_fd)) {
|
|
tevent_debug(port_ev->ev, TEVENT_DEBUG_WARNING,
|
|
"Failed to set close-on-exec, file descriptor may be leaked to children.\n");
|
|
}
|
|
|
|
port_ev->pid = getpid();
|
|
talloc_set_destructor(port_ev, port_ctx_destructor);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
Functions to manage the lower level cache of associated events on the port_fd.
|
|
*/
|
|
|
|
static int port_associate_vals_destructor(struct port_associate_vals *val)
|
|
{
|
|
DLIST_REMOVE(val->port_ev->po_vals, val);
|
|
memset(val, '\0', sizeof(struct port_associate_vals));
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* TODO: As the port_association is per-fde, it should be possible to store it
|
|
* directly in fde->additional_data, alongside any multiplexed-fde. That way the
|
|
* lookup on store and delete would be avoided, and associate_all_events() could
|
|
* walk the ev->fd_events list.
|
|
*/
|
|
static bool store_port_association(struct port_event_context *port_ev,
|
|
struct tevent_fd *fde,
|
|
int events)
|
|
{
|
|
struct port_associate_vals *val;
|
|
|
|
for (val = port_ev->po_vals; val; val = val->next) {
|
|
if (val->fde->fd == fde->fd) {
|
|
/* Association already attached to fd. */
|
|
if (val->events != events) {
|
|
val->events = events;
|
|
val->associated_event = false;
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
|
|
val = talloc_zero(port_ev, struct port_associate_vals);
|
|
if (val == NULL) {
|
|
return false;
|
|
}
|
|
|
|
val->port_ev = port_ev;
|
|
val->fde = fde;
|
|
val->events = events;
|
|
val->associated_event = false;
|
|
|
|
DLIST_ADD(port_ev->po_vals, val);
|
|
talloc_set_destructor(val, port_associate_vals_destructor);
|
|
|
|
return true;
|
|
}
|
|
|
|
static void delete_port_association(struct port_event_context *port_ev,
|
|
struct tevent_fd *fde)
|
|
{
|
|
struct port_associate_vals *val;
|
|
|
|
for (val = port_ev->po_vals; val; val = val->next) {
|
|
if (val->fde == fde) {
|
|
if (val->associated_event) {
|
|
(void)port_dissociate(port_ev->port_fd,
|
|
PORT_SOURCE_FD,
|
|
fde->fd);
|
|
}
|
|
talloc_free(val);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static int associate_all_events(struct port_event_context *port_ev)
|
|
{
|
|
struct port_associate_vals *val;
|
|
|
|
for (val = port_ev->po_vals; val; val = val->next) {
|
|
int ret;
|
|
if (val->associated_event) {
|
|
continue;
|
|
}
|
|
ret = port_associate(port_ev->port_fd,
|
|
PORT_SOURCE_FD,
|
|
(uintptr_t)val->fde->fd,
|
|
val->events,
|
|
(void *)val);
|
|
if (ret != 0) {
|
|
return -1;
|
|
}
|
|
val->associated_event = true;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int port_update_event(struct port_event_context *port_ev, struct tevent_fd *fde);
|
|
|
|
/*
|
|
Reopen the port handle when our pid changes.
|
|
*/
|
|
static int port_check_reopen(struct port_event_context *port_ev)
|
|
{
|
|
struct tevent_fd *fde;
|
|
|
|
if (port_ev->pid == getpid()) {
|
|
return 0;
|
|
}
|
|
|
|
close(port_ev->port_fd);
|
|
port_ev->port_fd = port_create();
|
|
if (port_ev->port_fd == -1) {
|
|
tevent_debug(port_ev->ev, TEVENT_DEBUG_FATAL,
|
|
"port_create() failed");
|
|
return -1;
|
|
}
|
|
|
|
if (!ev_set_close_on_exec(port_ev->port_fd)) {
|
|
tevent_debug(port_ev->ev, TEVENT_DEBUG_WARNING,
|
|
"Failed to set close-on-exec, file descriptor may be leaked to children.\n");
|
|
}
|
|
|
|
port_ev->pid = getpid();
|
|
for (fde=port_ev->ev->fd_events;fde;fde=fde->next) {
|
|
fde->additional_flags &= PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
|
|
if (port_update_event(port_ev, fde) != 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Solaris ports cannot add the same file descriptor twice, once
|
|
* with read, once with write which is allowed by the tevent backend.
|
|
* Multiplex the existing fde, flag it as such so we can search for the
|
|
* correct fde on event triggering.
|
|
*/
|
|
|
|
static void port_setup_multiplex_fd(struct port_event_context *port_ev,
|
|
struct tevent_fd *add_fde,
|
|
struct tevent_fd *mpx_fde)
|
|
{
|
|
/*
|
|
* Make each fde->additional_data pointers point at each other
|
|
* so we can look them up from each other. They are now paired.
|
|
*/
|
|
mpx_fde->additional_data = add_fde;
|
|
add_fde->additional_data = mpx_fde;
|
|
|
|
/* Now flag both fde's as being multiplexed. */
|
|
mpx_fde->additional_flags |= PORT_ADDITIONAL_FD_FLAG_HAS_MPX;
|
|
add_fde->additional_flags |= PORT_ADDITIONAL_FD_FLAG_HAS_MPX;
|
|
|
|
/* We need to keep the GOT_ERROR flag. */
|
|
if (mpx_fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_GOT_ERROR) {
|
|
add_fde->additional_flags |= PORT_ADDITIONAL_FD_FLAG_GOT_ERROR;
|
|
}
|
|
}
|
|
|
|
/*
|
|
Add the port event to the given fd_event,
|
|
Or modify an existing event.
|
|
*/
|
|
|
|
static int port_add_event(struct port_event_context *port_ev, struct tevent_fd *fde)
|
|
{
|
|
int flags = port_map_flags(fde->flags);
|
|
struct tevent_fd *mpx_fde = NULL;
|
|
|
|
fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
|
|
fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_REPORT_ERROR;
|
|
|
|
if (fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_HAS_MPX) {
|
|
/*
|
|
* This is already a multiplexed fde, we need to include both
|
|
* flags in the modified event.
|
|
*/
|
|
mpx_fde = talloc_get_type_abort(fde->additional_data,
|
|
struct tevent_fd);
|
|
|
|
mpx_fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
|
|
mpx_fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_REPORT_ERROR;
|
|
|
|
flags |= port_map_flags(mpx_fde->flags);
|
|
} else {
|
|
/*
|
|
* Not (yet) a multiplexed event. See if there
|
|
* is already an event with the same fd.
|
|
*/
|
|
for (mpx_fde = port_ev->ev->fd_events; mpx_fde; mpx_fde = mpx_fde->next) {
|
|
if (mpx_fde->fd != fde->fd) {
|
|
continue;
|
|
}
|
|
if (mpx_fde == fde) {
|
|
continue;
|
|
}
|
|
/* Same fd. */
|
|
break;
|
|
}
|
|
if (mpx_fde) {
|
|
if (mpx_fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_HAS_MPX) {
|
|
/* Logic error. Can't have more then 2 multiplexed fde's. */
|
|
tevent_debug(port_ev->ev, TEVENT_DEBUG_FATAL,
|
|
"multiplex fde for fd[%d] is already multiplexed\n",
|
|
mpx_fde->fd);
|
|
return -1;
|
|
}
|
|
flags |= port_map_flags(mpx_fde->flags);
|
|
}
|
|
}
|
|
|
|
if (!store_port_association(port_ev,
|
|
fde,
|
|
flags)) {
|
|
tevent_debug(port_ev->ev, TEVENT_DEBUG_FATAL,
|
|
"store_port_association failed for fd[%d]\n",
|
|
fde->fd);
|
|
return -1;
|
|
}
|
|
|
|
/* Note we have an association now. */
|
|
fde->additional_flags |= PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
|
|
/* Only if we want to read do we tell the event handler about errors. */
|
|
if (fde->flags & TEVENT_FD_READ) {
|
|
fde->additional_flags |= PORT_ADDITIONAL_FD_FLAG_REPORT_ERROR;
|
|
}
|
|
if (mpx_fde == NULL) {
|
|
return 0;
|
|
}
|
|
/* Set up the multiplex pointer. Does no harm if already multiplexed. */
|
|
port_setup_multiplex_fd(port_ev,
|
|
fde,
|
|
mpx_fde);
|
|
|
|
mpx_fde->additional_flags |= PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
|
|
/* Only if we want to read do we tell the event handler about errors. */
|
|
if (mpx_fde->flags & TEVENT_FD_READ) {
|
|
mpx_fde->additional_flags |= PORT_ADDITIONAL_FD_FLAG_REPORT_ERROR;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
Delete the port association for the given fd_event.
|
|
*/
|
|
|
|
static void port_del_event(struct port_event_context *port_ev, struct tevent_fd *fde)
|
|
{
|
|
struct tevent_fd *mpx_fde = NULL;
|
|
|
|
fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
|
|
fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_REPORT_ERROR;
|
|
|
|
if (fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_HAS_MPX) {
|
|
/*
|
|
* This is a multiplexed fde, we need to remove
|
|
* both associations.
|
|
*/
|
|
mpx_fde = talloc_get_type_abort(fde->additional_data,
|
|
struct tevent_fd);
|
|
|
|
mpx_fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
|
|
mpx_fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_REPORT_ERROR;
|
|
mpx_fde->additional_data = NULL;
|
|
|
|
fde->additional_data = NULL;
|
|
}
|
|
delete_port_association(port_ev, fde);
|
|
}
|
|
|
|
/*
|
|
Add or remove the port event from the given fd_event
|
|
*/
|
|
static int port_update_event(struct port_event_context *port_ev, struct tevent_fd *fde)
|
|
{
|
|
bool got_error = (fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_GOT_ERROR);
|
|
bool want_read = (fde->flags & TEVENT_FD_READ);
|
|
bool want_write = (fde->flags & TEVENT_FD_WRITE);
|
|
struct tevent_fd *mpx_fde = NULL;
|
|
|
|
if (fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_HAS_MPX) {
|
|
/*
|
|
* work out what the multiplexed fde wants.
|
|
*/
|
|
mpx_fde = talloc_get_type_abort(fde->additional_data,
|
|
struct tevent_fd);
|
|
if (mpx_fde->flags & TEVENT_FD_READ) {
|
|
want_read = true;
|
|
}
|
|
if (mpx_fde->flags & TEVENT_FD_WRITE) {
|
|
want_write = true;
|
|
}
|
|
}
|
|
|
|
if (fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION) {
|
|
/* There's already an association. */
|
|
if (want_read || (want_write && !got_error)) {
|
|
return port_add_event(port_ev, fde);
|
|
}
|
|
/*
|
|
* If we want to match the select behavior, we need to remove the port event
|
|
* when the caller isn't interested in events.
|
|
*/
|
|
port_del_event(port_ev, fde);
|
|
return 0;
|
|
}
|
|
|
|
/* There's no port event attached to the fde. */
|
|
if (want_read || (want_write && !got_error)) {
|
|
return port_add_event(port_ev, fde);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
Cope with port_get returning EPOLLHP|EPOLLERR on an association.
|
|
Return true if there's nothing else to do, false if this event
|
|
needs further handling.
|
|
*/
|
|
|
|
static bool port_handle_hup_or_err(struct port_event_context *port_ev,
|
|
struct tevent_fd *fde)
|
|
{
|
|
if (fde == NULL) {
|
|
return true;
|
|
}
|
|
|
|
fde->additional_flags |= PORT_ADDITIONAL_FD_FLAG_GOT_ERROR;
|
|
/*
|
|
* If we only wait for TEVENT_FD_WRITE, we should not tell the
|
|
* event handler about it, and remove the port association,
|
|
* as we only report error when waiting for read events,
|
|
* to match the select() behavior.
|
|
*/
|
|
if (!(fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_REPORT_ERROR)) {
|
|
/*
|
|
* Do the same as the poll backend and
|
|
* remove the writable flag.
|
|
*/
|
|
fde->flags &= ~TEVENT_FD_WRITE;
|
|
return true;
|
|
}
|
|
/* This has TEVENT_FD_READ set, we're not finished. */
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
Event loop handling using Solaris ports.
|
|
*/
|
|
static int port_event_loop(struct port_event_context *port_ev, struct timeval *tvalp)
|
|
{
|
|
int ret;
|
|
#define MAXEVENTS 1
|
|
port_event_t events[MAXEVENTS];
|
|
uint_t nget = 1;
|
|
uint_t max_events = MAXEVENTS;
|
|
uint_t i;
|
|
int port_errno;
|
|
struct timespec ts;
|
|
struct tevent_context *ev = port_ev->ev;
|
|
|
|
if (tvalp) {
|
|
ts.tv_sec = tvalp->tv_sec;
|
|
ts.tv_nsec = tvalp->tv_usec * 1000;
|
|
}
|
|
|
|
if (port_ev->ev->signal_events &&
|
|
tevent_common_check_signal(ev)) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Solaris triggers sending the event to the port
|
|
* at the time the port association is done. Postpone
|
|
* associating fd's until just before we get the events,
|
|
* otherwise we can deadlock.
|
|
*/
|
|
|
|
if (associate_all_events(port_ev) != 0) {
|
|
return -1;
|
|
}
|
|
|
|
tevent_trace_point_callback(ev, TEVENT_TRACE_BEFORE_WAIT);
|
|
ret = port_getn(port_ev->port_fd, events, max_events, &nget, &ts);
|
|
port_errno = errno;
|
|
tevent_trace_point_callback(ev, TEVENT_TRACE_AFTER_WAIT);
|
|
|
|
if (ret == -1 && port_errno == EINTR) {
|
|
if (ev->signal_events) {
|
|
tevent_common_check_signal(ev);
|
|
}
|
|
/*
|
|
* If no signal handlers we got an unsolicited
|
|
* signal wakeup. This can happen with epoll
|
|
* too. Just return and ignore.
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
if (ret == -1 && port_errno == ETIME && tvalp) {
|
|
/* we don't care about a possible delay here */
|
|
tevent_common_loop_timer_delay(ev);
|
|
return 0;
|
|
}
|
|
|
|
if (ret == -1) {
|
|
tevent_debug(ev, TEVENT_DEBUG_ERROR,
|
|
"port_get failed (%s)\n",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < nget; i++) {
|
|
struct tevent_fd *mpx_fde = NULL;
|
|
struct tevent_fd *fde = NULL;
|
|
uint16_t flags = 0;
|
|
struct port_associate_vals *val = talloc_get_type(events[i].portev_user,
|
|
struct port_associate_vals);
|
|
if (val == NULL) {
|
|
tevent_debug(ev, TEVENT_DEBUG_ERROR,
|
|
"port_getn() gave bad data");
|
|
return -1;
|
|
}
|
|
|
|
/* Mark this event as needing to be re-associated. */
|
|
val->associated_event = false;
|
|
|
|
fde = val->fde;
|
|
|
|
if (fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_HAS_MPX) {
|
|
/*
|
|
* Save off the multiplexed event in case we need
|
|
* to use it to call the handler function.
|
|
*/
|
|
mpx_fde = talloc_get_type_abort(fde->additional_data,
|
|
struct tevent_fd);
|
|
}
|
|
|
|
if (events[i].portev_events & (POLLHUP|POLLERR)) {
|
|
bool handled_fde = port_handle_hup_or_err(port_ev, fde);
|
|
bool handled_mpx = port_handle_hup_or_err(port_ev, mpx_fde);
|
|
|
|
if (handled_fde && handled_mpx) {
|
|
return port_update_event(port_ev, fde);
|
|
}
|
|
|
|
if (!handled_mpx) {
|
|
/*
|
|
* If the mpx event was the one that needs
|
|
* further handling, it's the TEVENT_FD_READ
|
|
* event so switch over and call that handler.
|
|
*/
|
|
fde = mpx_fde;
|
|
mpx_fde = NULL;
|
|
}
|
|
flags |= TEVENT_FD_READ;
|
|
}
|
|
|
|
if (events[i].portev_events & POLLIN) {
|
|
flags |= TEVENT_FD_READ;
|
|
}
|
|
if (events[i].portev_events & POLLOUT) {
|
|
flags |= TEVENT_FD_WRITE;
|
|
}
|
|
|
|
if (flags & TEVENT_FD_WRITE) {
|
|
if (fde->flags & TEVENT_FD_WRITE) {
|
|
mpx_fde = NULL;
|
|
}
|
|
if (mpx_fde && (mpx_fde->flags & TEVENT_FD_WRITE)) {
|
|
fde = mpx_fde;
|
|
mpx_fde = NULL;
|
|
}
|
|
|
|
if (mpx_fde) {
|
|
/* Ensure we got the right fde. */
|
|
if ((flags & fde->flags) == 0) {
|
|
fde = mpx_fde;
|
|
mpx_fde = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Make sure we only pass the flags
|
|
* the handler is expecting.
|
|
*/
|
|
flags &= fde->flags;
|
|
if (flags) {
|
|
fde->handler(ev, fde, flags, fde->private_data);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
create a port_event_context structure.
|
|
*/
|
|
static int port_event_context_init(struct tevent_context *ev)
|
|
{
|
|
int ret;
|
|
struct port_event_context *port_ev;
|
|
|
|
/*
|
|
* We might be called during tevent_re_initialise()
|
|
* which means we need to free our old additional_data.
|
|
*/
|
|
TALLOC_FREE(ev->additional_data);
|
|
|
|
port_ev = talloc_zero(ev, struct port_event_context);
|
|
if (!port_ev) {
|
|
return -1;
|
|
}
|
|
port_ev->ev = ev;
|
|
port_ev->port_fd = -1;
|
|
port_ev->pid = (pid_t)-1;
|
|
|
|
ret = port_init_ctx(port_ev);
|
|
if (ret != 0) {
|
|
talloc_free(port_ev);
|
|
return ret;
|
|
}
|
|
|
|
ev->additional_data = port_ev;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
destroy an fd_event
|
|
*/
|
|
static int port_event_fd_destructor(struct tevent_fd *fde)
|
|
{
|
|
struct tevent_context *ev = fde->event_ctx;
|
|
struct port_event_context *port_ev = NULL;
|
|
struct tevent_fd *mpx_fde = NULL;
|
|
int flags = (int)fde->flags;
|
|
|
|
if (ev == NULL) {
|
|
return tevent_common_fd_destructor(fde);
|
|
}
|
|
|
|
port_ev = talloc_get_type_abort(ev->additional_data,
|
|
struct port_event_context);
|
|
|
|
DLIST_REMOVE(ev->fd_events, fde);
|
|
|
|
if (fde->additional_flags & PORT_ADDITIONAL_FD_FLAG_HAS_MPX) {
|
|
mpx_fde = talloc_get_type_abort(fde->additional_data,
|
|
struct tevent_fd);
|
|
|
|
fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_HAS_MPX;
|
|
mpx_fde->additional_flags &= ~PORT_ADDITIONAL_FD_FLAG_HAS_MPX;
|
|
|
|
fde->additional_data = NULL;
|
|
mpx_fde->additional_data = NULL;
|
|
|
|
fde->additional_flags &= PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION;
|
|
}
|
|
|
|
(void)port_check_reopen(port_ev);
|
|
|
|
if (mpx_fde != NULL) {
|
|
(void)port_update_event(port_ev, mpx_fde);
|
|
}
|
|
|
|
fde->flags = 0;
|
|
(void)port_update_event(port_ev, fde);
|
|
fde->flags = flags;
|
|
|
|
return tevent_common_fd_destructor(fde);
|
|
}
|
|
|
|
/*
|
|
add a fd based event
|
|
return NULL on failure (memory allocation error)
|
|
*/
|
|
static struct tevent_fd *port_event_add_fd(struct tevent_context *ev, TALLOC_CTX *mem_ctx,
|
|
int fd, uint16_t flags,
|
|
tevent_fd_handler_t handler,
|
|
void *private_data,
|
|
const char *handler_name,
|
|
const char *location)
|
|
{
|
|
struct port_event_context *port_ev =
|
|
talloc_get_type_abort(ev->additional_data,
|
|
struct port_event_context);
|
|
struct tevent_fd *fde;
|
|
|
|
fde = tevent_common_add_fd(ev, mem_ctx, fd, flags,
|
|
handler, private_data,
|
|
handler_name, location);
|
|
if (!fde) {
|
|
return NULL;
|
|
}
|
|
|
|
talloc_set_destructor(fde, port_event_fd_destructor);
|
|
|
|
if (port_check_reopen(port_ev) != 0) {
|
|
TALLOC_FREE(fde);
|
|
return NULL;
|
|
}
|
|
|
|
if (port_update_event(port_ev, fde) != 0) {
|
|
TALLOC_FREE(fde);
|
|
return NULL;
|
|
}
|
|
|
|
return fde;
|
|
}
|
|
|
|
/*
|
|
set the fd event flags
|
|
*/
|
|
static void port_event_set_fd_flags(struct tevent_fd *fde, uint16_t flags)
|
|
{
|
|
struct tevent_context *ev;
|
|
struct port_event_context *port_ev;
|
|
|
|
if (fde->flags == flags) {
|
|
return;
|
|
}
|
|
|
|
ev = fde->event_ctx;
|
|
port_ev = talloc_get_type_abort(ev->additional_data,
|
|
struct port_event_context);
|
|
|
|
fde->flags = flags;
|
|
|
|
(void)port_check_reopen(port_ev);
|
|
(void)port_update_event(port_ev, fde);
|
|
}
|
|
|
|
/*
|
|
do a single event loop using the events defined in ev
|
|
*/
|
|
static int port_event_loop_once(struct tevent_context *ev, const char *location)
|
|
{
|
|
struct port_event_context *port_ev = talloc_get_type(ev->additional_data,
|
|
struct port_event_context);
|
|
struct timeval tval;
|
|
|
|
if (ev->signal_events &&
|
|
tevent_common_check_signal(ev)) {
|
|
return 0;
|
|
}
|
|
|
|
if (ev->immediate_events &&
|
|
tevent_common_loop_immediate(ev)) {
|
|
return 0;
|
|
}
|
|
|
|
tval = tevent_common_loop_timer_delay(ev);
|
|
if (tevent_timeval_is_zero(&tval)) {
|
|
return 0;
|
|
}
|
|
|
|
if (port_check_reopen(port_ev) != 0) {
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
return port_event_loop(port_ev, &tval);
|
|
}
|
|
|
|
static const struct tevent_ops port_event_ops = {
|
|
.context_init = port_event_context_init,
|
|
.add_fd = port_event_add_fd,
|
|
.set_fd_close_fn = tevent_common_fd_set_close_fn,
|
|
.get_fd_flags = tevent_common_fd_get_flags,
|
|
.set_fd_flags = port_event_set_fd_flags,
|
|
.add_timer = tevent_common_add_timer_v2,
|
|
.schedule_immediate = tevent_common_schedule_immediate,
|
|
.add_signal = tevent_common_add_signal,
|
|
.loop_once = port_event_loop_once,
|
|
.loop_wait = tevent_common_loop_wait,
|
|
};
|
|
|
|
_PRIVATE_ bool tevent_port_init(void)
|
|
{
|
|
if (!tevent_register_backend("port", &port_event_ops)) {
|
|
return false;
|
|
}
|
|
tevent_set_default_backend("port");
|
|
return true;
|
|
}
|