/*
* Copyright (C) 2010 Red Hat, Inc.
*
* Author: Angus Salkeld <asalkeld@redhat.com>
*
* This file is part of libqb.
*
* libqb 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 2.1 of the License, or
* (at your option) any later version.
*
* libqb 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 libqb. If not, see <http://www.gnu.org/licenses/>.
*/
#include "os_base.h"
#include <poll.h>
#include "util_int.h"
#include "ipc_int.h"
#include <qb/qbdefs.h>
#include <qb/qbatomic.h>
#include <qb/qbipcs.h>
static void qb_ipcs_flowcontrol_set(struct qb_ipcs_connection *c,
int32_t fc_enable);
static int32_t
new_event_notification(struct qb_ipcs_connection * c);
static QB_LIST_DECLARE(qb_ipc_services);
qb_ipcs_service_t *
qb_ipcs_create(const char *name,
int32_t service_id,
enum qb_ipc_type type, struct qb_ipcs_service_handlers *handlers)
{
struct qb_ipcs_service *s;
s = calloc(1, sizeof(struct qb_ipcs_service));
if (s == NULL) {
return NULL;
}
if (type == QB_IPC_NATIVE) {
#ifdef DISABLE_IPC_SHM
s->type = QB_IPC_SOCKET;
#else
s->type = QB_IPC_SHM;
#endif /* DISABLE_IPC_SHM */
} else {
s->type = type;
}
s->pid = getpid();
s->needs_sock_for_poll = QB_FALSE;
s->poll_priority = QB_LOOP_MED;
/* Initial alloc ref */
qb_ipcs_ref(s);
s->service_id = service_id;
(void)strlcpy(s->name, name, NAME_MAX);
s->serv_fns.connection_accept = handlers->connection_accept;
s->serv_fns.connection_created = handlers->connection_created;
s->serv_fns.msg_process = handlers->msg_process;
s->serv_fns.connection_closed = handlers->connection_closed;
s->serv_fns.connection_destroyed = handlers->connection_destroyed;
qb_list_init(&s->connections);
qb_list_init(&s->list);
qb_list_add(&s->list, &qb_ipc_services);
return s;
}
void
qb_ipcs_poll_handlers_set(struct qb_ipcs_service *s,
struct qb_ipcs_poll_handlers *handlers)
{
s->poll_fns.job_add = handlers->job_add;
s->poll_fns.dispatch_add = handlers->dispatch_add;
s->poll_fns.dispatch_mod = handlers->dispatch_mod;
s->poll_fns.dispatch_del = handlers->dispatch_del;
}
void
qb_ipcs_service_context_set(qb_ipcs_service_t* s,
void *context)
{
s->context = context;
}
void *
qb_ipcs_service_context_get(qb_ipcs_service_t* s)
{
return s->context;
}
int32_t
qb_ipcs_run(struct qb_ipcs_service *s)
{
int32_t res = 0;
if (s->poll_fns.dispatch_add == NULL ||
s->poll_fns.dispatch_mod == NULL ||
s->poll_fns.dispatch_del == NULL) {
res = -EINVAL;
goto run_cleanup;
}
switch (s->type) {
case QB_IPC_SOCKET:
qb_ipcs_us_init((struct qb_ipcs_service *)s);
break;
case QB_IPC_SHM:
#ifdef DISABLE_IPC_SHM
res = -ENOTSUP;
#else
qb_ipcs_shm_init((struct qb_ipcs_service *)s);
#endif /* DISABLE_IPC_SHM */
break;
case QB_IPC_POSIX_MQ:
case QB_IPC_SYSV_MQ:
res = -ENOTSUP;
break;
default:
res = -EINVAL;
break;
}
if (res == 0) {
res = qb_ipcs_us_publish(s);
if (res < 0) {
(void)qb_ipcs_us_withdraw(s);
goto run_cleanup;
}
}
run_cleanup:
if (res < 0) {
/* Failed to run services, removing initial alloc reference. */
qb_ipcs_unref(s);
}
return res;
}
static int32_t
_modify_dispatch_descriptor_(struct qb_ipcs_connection *c)
{
qb_ipcs_dispatch_mod_fn disp_mod = c->service->poll_fns.dispatch_mod;
if (c->service->type == QB_IPC_SOCKET) {
return disp_mod(c->service->poll_priority,
c->event.u.us.sock,
c->poll_events, c,
qb_ipcs_dispatch_connection_request);
} else {
return disp_mod(c->service->poll_priority,
c->setup.u.us.sock,
c->poll_events, c,
qb_ipcs_dispatch_connection_request);
}
return -EINVAL;
}
void
qb_ipcs_request_rate_limit(struct qb_ipcs_service *s,
enum qb_ipcs_rate_limit rl)
{
struct qb_ipcs_connection *c;
enum qb_loop_priority old_p = s->poll_priority;
struct qb_list_head *pos;
struct qb_list_head *n;
switch (rl) {
case QB_IPCS_RATE_FAST:
s->poll_priority = QB_LOOP_HIGH;
break;
case QB_IPCS_RATE_SLOW:
case QB_IPCS_RATE_OFF:
case QB_IPCS_RATE_OFF_2:
s->poll_priority = QB_LOOP_LOW;
break;
default:
case QB_IPCS_RATE_NORMAL:
s->poll_priority = QB_LOOP_MED;
break;
}
qb_list_for_each_safe(pos, n, &s->connections) {
c = qb_list_entry(pos, struct qb_ipcs_connection, list);
qb_ipcs_connection_ref(c);
if (rl == QB_IPCS_RATE_OFF) {
qb_ipcs_flowcontrol_set(c, 1);
} else if (rl == QB_IPCS_RATE_OFF_2) {
qb_ipcs_flowcontrol_set(c, 2);
} else {
qb_ipcs_flowcontrol_set(c, QB_FALSE);
}
if (old_p != s->poll_priority) {
(void)_modify_dispatch_descriptor_(c);
}
qb_ipcs_connection_unref(c);
}
}
void
qb_ipcs_ref(struct qb_ipcs_service *s)
{
qb_atomic_int_inc(&s->ref_count);
}
void
qb_ipcs_unref(struct qb_ipcs_service *s)
{
int32_t free_it;
assert(s->ref_count > 0);
free_it = qb_atomic_int_dec_and_test(&s->ref_count);
if (free_it) {
qb_util_log(LOG_DEBUG, "%s() - destroying", __func__);
free(s);
}
}
void
qb_ipcs_destroy(struct qb_ipcs_service *s)
{
struct qb_ipcs_connection *c = NULL;
struct qb_list_head *pos;
struct qb_list_head *n;
if (s == NULL) {
return;
}
qb_list_for_each_safe(pos, n, &s->connections) {
c = qb_list_entry(pos, struct qb_ipcs_connection, list);
if (c == NULL) {
continue;
}
qb_ipcs_disconnect(c);
}
(void)qb_ipcs_us_withdraw(s);
/* service destroyed, remove initial alloc ref */
qb_ipcs_unref(s);
}
/*
* connection API
*/
static struct qb_ipc_one_way *
_event_sock_one_way_get(struct qb_ipcs_connection * c)
{
if (c->service->needs_sock_for_poll) {
return &c->setup;
}
if (c->event.type == QB_IPC_SOCKET) {
return &c->event;
}
return NULL;
}
static struct qb_ipc_one_way *
_response_sock_one_way_get(struct qb_ipcs_connection * c)
{
if (c->service->needs_sock_for_poll) {
return &c->setup;
}
if (c->response.type == QB_IPC_SOCKET) {
return &c->response;
}
return NULL;
}
ssize_t
qb_ipcs_response_send(struct qb_ipcs_connection *c, const void *data,
size_t size)
{
ssize_t res;
if (c == NULL) {
return -EINVAL;
}
qb_ipcs_connection_ref(c);
res = c->service->funcs.send(&c->response, data, size);
if (res == size) {
c->stats.responses++;
} else if (res == -EAGAIN || res == -ETIMEDOUT) {
struct qb_ipc_one_way *ow = _response_sock_one_way_get(c);
if (ow) {
ssize_t res2 = qb_ipc_us_ready(ow, &c->setup, 0, POLLOUT);
if (res2 < 0) {
res = res2;
}
}
c->stats.send_retries++;
}
qb_ipcs_connection_unref(c);
return res;
}
ssize_t
qb_ipcs_response_sendv(struct qb_ipcs_connection * c, const struct iovec * iov,
size_t iov_len)
{
ssize_t res;
if (c == NULL) {
return -EINVAL;
}
qb_ipcs_connection_ref(c);
res = c->service->funcs.sendv(&c->response, iov, iov_len);
if (res > 0) {
c->stats.responses++;
} else if (res == -EAGAIN || res == -ETIMEDOUT) {
struct qb_ipc_one_way *ow = _response_sock_one_way_get(c);
if (ow) {
ssize_t res2 = qb_ipc_us_ready(ow, &c->setup, 0, POLLOUT);
if (res2 < 0) {
res = res2;
}
}
c->stats.send_retries++;
}
qb_ipcs_connection_unref(c);
return res;
}
static int32_t
resend_event_notifications(struct qb_ipcs_connection *c)
{
ssize_t res = 0;
if (!c->service->needs_sock_for_poll) {
return res;
}
if (c->outstanding_notifiers > 0) {
res = qb_ipc_us_send(&c->setup, c->receive_buf,
c->outstanding_notifiers);
}
if (res > 0) {
c->outstanding_notifiers -= res;
}
assert(c->outstanding_notifiers >= 0);
if (c->outstanding_notifiers == 0) {
c->poll_events = POLLIN | POLLPRI | POLLNVAL;
(void)_modify_dispatch_descriptor_(c);
}
return res;
}
static int32_t
new_event_notification(struct qb_ipcs_connection * c)
{
ssize_t res = 0;
if (!c->service->needs_sock_for_poll) {
return res;
}
assert(c->outstanding_notifiers >= 0);
if (c->outstanding_notifiers > 0) {
c->outstanding_notifiers++;
res = resend_event_notifications(c);
} else {
res = qb_ipc_us_send(&c->setup, &c->outstanding_notifiers, 1);
if (res == -EAGAIN) {
/*
* notify the client later, when we can.
*/
c->outstanding_notifiers++;
c->poll_events = POLLOUT | POLLIN | POLLPRI | POLLNVAL;
(void)_modify_dispatch_descriptor_(c);
}
}
return res;
}
ssize_t
qb_ipcs_event_send(struct qb_ipcs_connection * c, const void *data, size_t size)
{
ssize_t res;
ssize_t resn;
if (c == NULL) {
return -EINVAL;
} else if (size > c->event.max_msg_size) {
return -EMSGSIZE;
}
qb_ipcs_connection_ref(c);
res = c->service->funcs.send(&c->event, data, size);
if (res == size) {
c->stats.events++;
resn = new_event_notification(c);
if (resn < 0 && resn != -EAGAIN && resn != -ENOBUFS) {
errno = -resn;
qb_util_perror(LOG_WARNING,
"new_event_notification (%s)",
c->description);
res = resn;
}
} else if (res == -EAGAIN || res == -ETIMEDOUT) {
struct qb_ipc_one_way *ow = _event_sock_one_way_get(c);
if (c->outstanding_notifiers > 0) {
resn = resend_event_notifications(c);
}
if (ow) {
resn = qb_ipc_us_ready(ow, &c->setup, 0, POLLOUT);
if (resn < 0) {
res = resn;
}
}
c->stats.send_retries++;
}
qb_ipcs_connection_unref(c);
return res;
}
ssize_t
qb_ipcs_event_sendv(struct qb_ipcs_connection * c,
const struct iovec * iov, size_t iov_len)
{
ssize_t res;
ssize_t resn;
if (c == NULL) {
return -EINVAL;
}
qb_ipcs_connection_ref(c);
res = c->service->funcs.sendv(&c->event, iov, iov_len);
if (res > 0) {
c->stats.events++;
resn = new_event_notification(c);
if (resn < 0 && resn != -EAGAIN) {
errno = -resn;
qb_util_perror(LOG_WARNING,
"new_event_notification (%s)",
c->description);
res = resn;
}
} else if (res == -EAGAIN || res == -ETIMEDOUT) {
struct qb_ipc_one_way *ow = _event_sock_one_way_get(c);
if (c->outstanding_notifiers > 0) {
resn = resend_event_notifications(c);
}
if (ow) {
resn = qb_ipc_us_ready(ow, &c->setup, 0, POLLOUT);
if (resn < 0) {
res = resn;
}
}
c->stats.send_retries++;
}
qb_ipcs_connection_unref(c);
return res;
}
qb_ipcs_connection_t *
qb_ipcs_connection_first_get(struct qb_ipcs_service * s)
{
struct qb_ipcs_connection *c;
if (qb_list_empty(&s->connections)) {
return NULL;
}
c = qb_list_first_entry(&s->connections, struct qb_ipcs_connection,
list);
qb_ipcs_connection_ref(c);
return c;
}
qb_ipcs_connection_t *
qb_ipcs_connection_next_get(struct qb_ipcs_service * s,
struct qb_ipcs_connection * current)
{
struct qb_ipcs_connection *c;
if (current == NULL ||
qb_list_is_last(¤t->list, &s->connections)) {
return NULL;
}
c = qb_list_first_entry(¤t->list, struct qb_ipcs_connection,
list);
qb_ipcs_connection_ref(c);
return c;
}
int32_t
qb_ipcs_service_id_get(struct qb_ipcs_connection * c)
{
if (c == NULL) {
return -EINVAL;
}
return c->service->service_id;
}
struct qb_ipcs_connection *
qb_ipcs_connection_alloc(struct qb_ipcs_service *s)
{
struct qb_ipcs_connection *c =
calloc(1, sizeof(struct qb_ipcs_connection));
if (c == NULL) {
return NULL;
}
c->pid = 0;
c->euid = -1;
c->egid = -1;
c->receive_buf = NULL;
c->context = NULL;
c->fc_enabled = QB_FALSE;
c->state = QB_IPCS_CONNECTION_INACTIVE;
c->poll_events = POLLIN | POLLPRI | POLLNVAL;
c->setup.type = s->type;
c->request.type = s->type;
c->response.type = s->type;
c->event.type = s->type;
(void)strlcpy(c->description, "not set yet", CONNECTION_DESCRIPTION);
/* initial alloc ref */
qb_ipcs_connection_ref(c);
/*
* The connection makes use of the service object. Give the connection
* a reference to the service so we know the service can never be destroyed
* until the connection is done with it.
*/
qb_ipcs_ref(s);
c->service = s;
qb_list_init(&c->list);
return c;
}
void
qb_ipcs_connection_ref(struct qb_ipcs_connection *c)
{
if (c) {
qb_atomic_int_inc(&c->refcount);
}
}
void
qb_ipcs_connection_unref(struct qb_ipcs_connection *c)
{
int32_t free_it;
if (c == NULL) {
return;
}
if (c->refcount < 1) {
qb_util_log(LOG_ERR, "ref:%d state:%d (%s)",
c->refcount, c->state, c->description);
assert(0);
}
free_it = qb_atomic_int_dec_and_test(&c->refcount);
if (free_it) {
qb_list_del(&c->list);
if (c->service->serv_fns.connection_destroyed) {
c->service->serv_fns.connection_destroyed(c);
}
c->service->funcs.disconnect(c);
/* Let go of the connection's reference to the service */
qb_ipcs_unref(c->service);
free(c->receive_buf);
free(c);
}
}
void
qb_ipcs_disconnect(struct qb_ipcs_connection *c)
{
int32_t res = 0;
qb_loop_job_dispatch_fn rerun_job;
if (c == NULL) {
return;
}
qb_util_log(LOG_DEBUG, "%s(%s) state:%d",
__func__, c->description, c->state);
if (c->state == QB_IPCS_CONNECTION_ACTIVE) {
c->service->funcs.disconnect(c);
c->state = QB_IPCS_CONNECTION_INACTIVE;
c->service->stats.closed_connections++;
/* This removes the initial alloc ref */
qb_ipcs_connection_unref(c);
/* return early as it's an incomplete connection.
*/
return;
}
if (c->state == QB_IPCS_CONNECTION_ESTABLISHED) {
c->service->funcs.disconnect(c);
c->state = QB_IPCS_CONNECTION_SHUTTING_DOWN;
c->service->stats.active_connections--;
c->service->stats.closed_connections++;
}
if (c->state == QB_IPCS_CONNECTION_SHUTTING_DOWN) {
int scheduled_retry = 0;
res = 0;
if (c->service->serv_fns.connection_closed) {
res = c->service->serv_fns.connection_closed(c);
}
if (res != 0) {
/* OK, so they want the connection_closed
* function re-run */
rerun_job =
(qb_loop_job_dispatch_fn) qb_ipcs_disconnect;
res = c->service->poll_fns.job_add(QB_LOOP_LOW,
c, rerun_job);
if (res == 0) {
/* this function is going to be called again.
* so hold off on the unref */
scheduled_retry = 1;
}
}
if (scheduled_retry == 0) {
/* This removes the initial alloc ref */
qb_ipcs_connection_unref(c);
}
}
}
static void
qb_ipcs_flowcontrol_set(struct qb_ipcs_connection *c, int32_t fc_enable)
{
if (c == NULL) {
return;
}
if (c->fc_enabled != fc_enable) {
c->service->funcs.fc_set(&c->request, fc_enable);
c->fc_enabled = fc_enable;
c->stats.flow_control_state = fc_enable;
c->stats.flow_control_count++;
}
}
static int32_t
_process_request_(struct qb_ipcs_connection *c, int32_t ms_timeout)
{
int32_t res = 0;
ssize_t size;
struct qb_ipc_request_header *hdr;
if (c->service->funcs.peek && c->service->funcs.reclaim) {
size = c->service->funcs.peek(&c->request, (void **)&hdr,
ms_timeout);
} else {
hdr = c->receive_buf;
size = c->service->funcs.recv(&c->request,
hdr,
c->request.max_msg_size,
ms_timeout);
}
if (size < 0) {
if (size != -EAGAIN && size != -ETIMEDOUT) {
qb_util_perror(LOG_DEBUG,
"recv from client connection failed (%s)",
c->description);
} else {
c->stats.recv_retries++;
}
res = size;
goto cleanup;
} else if (size == 0 || hdr->id == QB_IPC_MSG_DISCONNECT) {
qb_util_log(LOG_DEBUG, "client requesting a disconnect (%s)",
c->description);
res = -ESHUTDOWN;
goto cleanup;
} else {
c->stats.requests++;
res = c->service->serv_fns.msg_process(c, hdr, hdr->size);
/* 0 == good, negative == backoff */
if (res < 0) {
res = -ENOBUFS;
} else {
res = size;
}
}
if (c && c->service->funcs.peek && c->service->funcs.reclaim) {
c->service->funcs.reclaim(&c->request);
}
cleanup:
return res;
}
#define IPC_REQUEST_TIMEOUT 10
#define MAX_RECV_MSGS 50
static ssize_t
_request_q_len_get(struct qb_ipcs_connection *c)
{
ssize_t q_len;
if (c->service->funcs.q_len_get) {
q_len = c->service->funcs.q_len_get(&c->request);
if (q_len <= 0) {
return q_len;
}
if (c->service->poll_priority == QB_LOOP_MED) {
q_len = QB_MIN(q_len, 5);
} else if (c->service->poll_priority == QB_LOOP_LOW) {
q_len = 1;
} else {
q_len = QB_MIN(q_len, MAX_RECV_MSGS);
}
} else {
q_len = 1;
}
return q_len;
}
int32_t
qb_ipcs_dispatch_connection_request(int32_t fd, int32_t revents, void *data)
{
struct qb_ipcs_connection *c = (struct qb_ipcs_connection *)data;
char bytes[MAX_RECV_MSGS];
int32_t res = 0;
int32_t res2;
int32_t recvd = 0;
ssize_t avail;
if (revents & POLLNVAL) {
qb_util_log(LOG_DEBUG, "NVAL conn (%s)", c->description);
res = -EINVAL;
goto dispatch_cleanup;
}
if (revents & POLLHUP) {
qb_util_log(LOG_DEBUG, "HUP conn (%s)", c->description);
res = -ESHUTDOWN;
goto dispatch_cleanup;
}
if (revents & POLLOUT) {
/* try resend events now that fd can write */
res = resend_event_notifications(c);
if (res < 0 && res != -EAGAIN) {
errno = -res;
qb_util_perror(LOG_WARNING,
"resend_event_notifications (%s)",
c->description);
}
/* nothing to read */
if ((revents & POLLIN) == 0) {
res = 0;
goto dispatch_cleanup;
}
}
if (c->fc_enabled) {
res = 0;
goto dispatch_cleanup;
}
avail = _request_q_len_get(c);
if (c->service->needs_sock_for_poll && avail == 0) {
res2 = qb_ipc_us_recv(&c->setup, bytes, 1, 0);
if (qb_ipc_us_sock_error_is_disconnected(res2)) {
errno = -res2;
qb_util_perror(LOG_WARNING, "conn (%s) disconnected",
c->description);
res = -ESHUTDOWN;
goto dispatch_cleanup;
} else {
qb_util_log(LOG_WARNING,
"conn (%s) Nothing in q but got POLLIN on fd:%d (res2:%d)",
c->description, fd, res2);
res = 0;
goto dispatch_cleanup;
}
}
do {
res = _process_request_(c, IPC_REQUEST_TIMEOUT);
if (res == -ESHUTDOWN) {
goto dispatch_cleanup;
}
if (res > 0 || res == -ENOBUFS || res == -EINVAL) {
recvd++;
}
if (res > 0) {
avail--;
}
} while (avail > 0 && res > 0 && !c->fc_enabled);
if (c->service->needs_sock_for_poll && recvd > 0) {
res2 = qb_ipc_us_recv(&c->setup, bytes, recvd, -1);
if (qb_ipc_us_sock_error_is_disconnected(res2)) {
errno = -res2;
qb_util_perror(LOG_ERR, "error receiving from setup sock (%s)", c->description);
res = -ESHUTDOWN;
goto dispatch_cleanup;
}
}
res = QB_MIN(0, res);
if (res == -EAGAIN || res == -ETIMEDOUT || res == -ENOBUFS) {
res = 0;
}
if (res != 0) {
if (res != -ENOTCONN) {
/*
* Abnormal state (ENOTCONN is normal shutdown).
*/
errno = -res;
qb_util_perror(LOG_ERR, "request returned error (%s)",
c->description);
}
}
dispatch_cleanup:
if (res != 0) {
qb_ipcs_disconnect(c);
}
return res;
}
void
qb_ipcs_context_set(struct qb_ipcs_connection *c, void *context)
{
if (c == NULL) {
return;
}
c->context = context;
}
void *
qb_ipcs_context_get(struct qb_ipcs_connection *c)
{
if (c == NULL) {
return NULL;
}
return c->context;
}
void *
qb_ipcs_connection_service_context_get(qb_ipcs_connection_t *c)
{
if (c == NULL || c->service == NULL) {
return NULL;
}
return c->service->context;
}
int32_t
qb_ipcs_connection_stats_get(qb_ipcs_connection_t * c,
struct qb_ipcs_connection_stats * stats,
int32_t clear_after_read)
{
if (c == NULL) {
return -EINVAL;
}
memcpy(stats, &c->stats, sizeof(struct qb_ipcs_connection_stats));
if (clear_after_read) {
memset(&c->stats, 0, sizeof(struct qb_ipcs_connection_stats_2));
c->stats.client_pid = c->pid;
}
return 0;
}
struct qb_ipcs_connection_stats_2*
qb_ipcs_connection_stats_get_2(qb_ipcs_connection_t *c,
int32_t clear_after_read)
{
struct qb_ipcs_connection_stats_2 * stats;
if (c == NULL) {
errno = EINVAL;
return NULL;
}
stats = calloc(1, sizeof(struct qb_ipcs_connection_stats_2));
if (stats == NULL) {
return NULL;
}
memcpy(stats, &c->stats, sizeof(struct qb_ipcs_connection_stats_2));
if (c->service->funcs.q_len_get) {
stats->event_q_length = c->service->funcs.q_len_get(&c->event);
} else {
stats->event_q_length = 0;
}
if (clear_after_read) {
memset(&c->stats, 0, sizeof(struct qb_ipcs_connection_stats_2));
c->stats.client_pid = c->pid;
}
return stats;
}
int32_t
qb_ipcs_stats_get(struct qb_ipcs_service * s,
struct qb_ipcs_stats * stats, int32_t clear_after_read)
{
if (s == NULL) {
return -EINVAL;
}
memcpy(stats, &s->stats, sizeof(struct qb_ipcs_stats));
if (clear_after_read) {
memset(&s->stats, 0, sizeof(struct qb_ipcs_stats));
}
return 0;
}
void
qb_ipcs_connection_auth_set(qb_ipcs_connection_t *c, uid_t uid,
gid_t gid, mode_t mode)
{
if (c) {
c->auth.uid = uid;
c->auth.gid = gid;
c->auth.mode = mode;
}
}
int32_t
qb_ipcs_connection_get_buffer_size(qb_ipcs_connection_t *c)
{
if (c == NULL) {
return -EINVAL;
}
/* request, response, and event shoud all have the same
* buffer size allocated. It doesn't matter which we return
* here. */
return c->response.max_msg_size;
}
void qb_ipcs_enforce_buffer_size(qb_ipcs_service_t *s, uint32_t buf_size)
{
if (s == NULL) {
return;
}
s->max_buffer_size = buf_size;
}