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-rw-r--r--src/libsystemd-rtnl/rtnl-internal.h5
-rw-r--r--src/libsystemd-rtnl/sd-rtnl.c241
-rw-r--r--src/libsystemd-rtnl/test-rtnl.c55
3 files changed, 275 insertions, 26 deletions
diff --git a/src/libsystemd-rtnl/rtnl-internal.h b/src/libsystemd-rtnl/rtnl-internal.h
index adad7850c5..c8a97da398 100644
--- a/src/libsystemd-rtnl/rtnl-internal.h
+++ b/src/libsystemd-rtnl/rtnl-internal.h
@@ -60,6 +60,11 @@ struct sd_rtnl {
Hashmap *reply_callbacks;
pid_t original_pid;
+
+ sd_event_source *io_event_source;
+ sd_event_source *time_event_source;
+ sd_event_source *quit_event_source;
+ sd_event *event;
};
#define RTNL_DEFAULT_TIMEOUT ((usec_t) (10 * USEC_PER_SEC))
diff --git a/src/libsystemd-rtnl/sd-rtnl.c b/src/libsystemd-rtnl/sd-rtnl.c
index 215c0ab060..8631ff05e0 100644
--- a/src/libsystemd-rtnl/sd-rtnl.c
+++ b/src/libsystemd-rtnl/sd-rtnl.c
@@ -344,18 +344,44 @@ static usec_t calc_elapse(uint64_t usec) {
return now(CLOCK_MONOTONIC) + usec;
}
-static int rtnl_poll(sd_rtnl *nl, uint64_t timeout_usec) {
+static int rtnl_poll(sd_rtnl *rtnl, bool need_more, uint64_t timeout_usec) {
struct pollfd p[1] = {};
struct timespec ts;
- int r;
+ usec_t m = (usec_t) -1;
+ int r, e;
+
+ assert(rtnl);
- assert(nl);
+ e = sd_rtnl_get_events(rtnl);
+ if (e < 0)
+ return e;
- p[0].fd = nl->fd;
- p[0].events = POLLIN;
+ if (need_more)
+ /* Caller wants more data, and doesn't care about
+ * what's been read or any other timeouts. */
+ return e |= POLLIN;
+ else {
+ usec_t until;
+ /* Caller wants to process if there is something to
+ * process, but doesn't care otherwise */
+
+ r = sd_rtnl_get_timeout(rtnl, &until);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ usec_t nw;
+ nw = now(CLOCK_MONOTONIC);
+ m = until > nw ? until - nw : 0;
+ }
+ }
- r = ppoll(p, 1, timeout_usec == (uint64_t) -1 ? NULL :
- timespec_store(&ts, timeout_usec), NULL);
+ if (timeout_usec != (uint64_t) -1 && (m == (uint64_t) -1 || timeout_usec < m))
+ m = timeout_usec;
+
+ p[0].fd = rtnl->fd;
+ p[0].events = e;
+
+ r = ppoll(p, 1, m == (uint64_t) -1 ? NULL : timespec_store(&ts, m), NULL);
if (r < 0)
return -errno;
@@ -369,7 +395,7 @@ int sd_rtnl_wait(sd_rtnl *nl, uint64_t timeout_usec) {
if (nl->rqueue_size > 0)
return 0;
- return rtnl_poll(nl, timeout_usec);
+ return rtnl_poll(nl, false, timeout_usec);
}
static int timeout_compare(const void *a, const void *b) {
@@ -552,7 +578,7 @@ int sd_rtnl_call(sd_rtnl *nl,
} else
left = (uint64_t) -1;
- r = rtnl_poll(nl, left);
+ r = rtnl_poll(nl, true, left);
if (r < 0)
return r;
@@ -561,3 +587,200 @@ int sd_rtnl_call(sd_rtnl *nl,
return r;
}
}
+
+int sd_rtnl_flush(sd_rtnl *rtnl) {
+ int r;
+
+ assert_return(rtnl, -EINVAL);
+ assert_return(!rtnl_pid_changed(rtnl), -ECHILD);
+
+ if (rtnl->wqueue_size <= 0)
+ return 0;
+
+ for (;;) {
+ r = dispatch_wqueue(rtnl);
+ if (r < 0)
+ return r;
+
+ if (rtnl->wqueue_size <= 0)
+ return 0;
+
+ r = rtnl_poll(rtnl, false, (uint64_t) -1);
+ if (r < 0)
+ return r;
+ }
+}
+
+int sd_rtnl_get_events(sd_rtnl *rtnl) {
+ int flags = 0;
+
+ assert_return(rtnl, -EINVAL);
+ assert_return(!rtnl_pid_changed(rtnl), -ECHILD);
+
+ if (rtnl->rqueue_size <= 0)
+ flags |= POLLIN;
+ if (rtnl->wqueue_size > 0)
+ flags |= POLLOUT;
+
+ return flags;
+}
+
+int sd_rtnl_get_timeout(sd_rtnl *rtnl, uint64_t *timeout_usec) {
+ struct reply_callback *c;
+
+ assert_return(rtnl, -EINVAL);
+ assert_return(timeout_usec, -EINVAL);
+ assert_return(!rtnl_pid_changed(rtnl), -ECHILD);
+
+ if (rtnl->rqueue_size > 0) {
+ *timeout_usec = 0;
+ return 1;
+ }
+
+ c = prioq_peek(rtnl->reply_callbacks_prioq);
+ if (!c) {
+ *timeout_usec = (uint64_t) -1;
+ return 0;
+ }
+
+ *timeout_usec = c->timeout;
+
+ return 1;
+}
+
+static int io_callback(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
+ sd_rtnl *rtnl = userdata;
+ int r;
+
+ assert(rtnl);
+
+ r = sd_rtnl_process(rtnl, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int time_callback(sd_event_source *s, uint64_t usec, void *userdata) {
+ sd_rtnl *rtnl = userdata;
+ int r;
+
+ assert(rtnl);
+
+ r = sd_rtnl_process(rtnl, NULL);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int prepare_callback(sd_event_source *s, void *userdata) {
+ sd_rtnl *rtnl = userdata;
+ int r, e;
+ usec_t until;
+
+ assert(s);
+ assert(rtnl);
+
+ e = sd_rtnl_get_events(rtnl);
+ if (e < 0)
+ return e;
+
+ r = sd_event_source_set_io_events(rtnl->io_event_source, e);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_get_timeout(rtnl, &until);
+ if (r < 0)
+ return r;
+ if (r > 0) {
+ int j;
+
+ j = sd_event_source_set_time(rtnl->time_event_source, until);
+ if (j < 0)
+ return j;
+ }
+
+ r = sd_event_source_set_enabled(rtnl->time_event_source, r > 0);
+ if (r < 0)
+ return r;
+
+ return 1;
+}
+
+static int quit_callback(sd_event_source *event, void *userdata) {
+ sd_rtnl *rtnl = userdata;
+
+ assert(event);
+
+ sd_rtnl_flush(rtnl);
+
+ return 1;
+}
+
+int sd_rtnl_attach_event(sd_rtnl *rtnl, sd_event *event, int priority) {
+ int r;
+
+ assert_return(rtnl, -EINVAL);
+ assert_return(!rtnl->event, -EBUSY);
+
+ assert(!rtnl->io_event_source);
+ assert(!rtnl->time_event_source);
+
+ if (event)
+ rtnl->event = sd_event_ref(event);
+ else {
+ r = sd_event_default(&rtnl->event);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_event_add_io(rtnl->event, rtnl->fd, 0, io_callback, rtnl, &rtnl->io_event_source);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_source_set_priority(rtnl->io_event_source, priority);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_source_set_prepare(rtnl->io_event_source, prepare_callback);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_add_monotonic(rtnl->event, 0, 0, time_callback, rtnl, &rtnl->time_event_source);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_source_set_priority(rtnl->time_event_source, priority);
+ if (r < 0)
+ goto fail;
+
+ r = sd_event_add_quit(rtnl->event, quit_callback, rtnl, &rtnl->quit_event_source);
+ if (r < 0)
+ goto fail;
+
+ return 0;
+
+fail:
+ sd_rtnl_detach_event(rtnl);
+ return r;
+}
+
+int sd_rtnl_detach_event(sd_rtnl *rtnl) {
+ assert_return(rtnl, -EINVAL);
+ assert_return(rtnl->event, -ENXIO);
+
+ if (rtnl->io_event_source)
+ rtnl->io_event_source = sd_event_source_unref(rtnl->io_event_source);
+
+ if (rtnl->time_event_source)
+ rtnl->time_event_source = sd_event_source_unref(rtnl->time_event_source);
+
+ if (rtnl->quit_event_source)
+ rtnl->quit_event_source = sd_event_source_unref(rtnl->quit_event_source);
+
+ if (rtnl->event)
+ rtnl->event = sd_event_unref(rtnl->event);
+
+ return 0;
+}
diff --git a/src/libsystemd-rtnl/test-rtnl.c b/src/libsystemd-rtnl/test-rtnl.c
index ea48f48455..75a210d3fb 100644
--- a/src/libsystemd-rtnl/test-rtnl.c
+++ b/src/libsystemd-rtnl/test-rtnl.c
@@ -27,6 +27,7 @@
#include "sd-rtnl.h"
#include "socket-util.h"
#include "rtnl-util.h"
+#include "event-util.h"
static void test_link_configure(sd_rtnl *rtnl, int ifindex) {
_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *message;
@@ -131,6 +132,29 @@ static int link_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
return 1;
}
+static void test_event_loop(int ifindex) {
+ _cleanup_event_unref_ sd_event *event = NULL;
+ _cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
+ _cleanup_sd_rtnl_message_unref_ sd_rtnl_message *m = NULL;
+ char *ifname;
+
+ ifname = strdup("lo2");
+ assert(ifname);
+
+ assert(sd_rtnl_open(0, &rtnl) >= 0);
+ assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, 0, 0, &m) >= 0);
+
+ assert(sd_rtnl_call_async(rtnl, m, &link_handler, ifname, 0, NULL) >= 0);
+
+ assert(sd_event_default(&event) >= 0);
+
+ assert(sd_rtnl_attach_event(rtnl, event, 0) >= 0);
+
+ assert(sd_event_run(event, 0) >= 0);
+
+ assert(sd_rtnl_detach_event(rtnl) >= 0);
+}
+
static int pipe_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
int *counter = userdata;
@@ -141,21 +165,18 @@ static int pipe_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
return sd_rtnl_message_get_errno(m);
}
-static void test_async(void) {
+static void test_async(int ifindex) {
_cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *m = NULL, *r = NULL;
- int if_loopback;
uint32_t serial;
char *ifname;
ifname = strdup("lo");
+ assert(ifname);
assert(sd_rtnl_open(0, &rtnl) >= 0);
- if_loopback = (int) if_nametoindex("lo");
- assert(if_loopback > 0);
-
- assert(sd_rtnl_message_link_new(RTM_GETLINK, if_loopback, 0, 0, &m) >= 0);
+ assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, 0, 0, &m) >= 0);
assert(sd_rtnl_call_async(rtnl, m, &link_handler, ifname, 0, &serial) >= 0);
@@ -163,19 +184,15 @@ static void test_async(void) {
assert(sd_rtnl_process(rtnl, &r) >= 0);
}
-static void test_pipe(void) {
+static void test_pipe(int ifindex) {
_cleanup_sd_rtnl_unref_ sd_rtnl *rtnl = NULL;
_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *m1 = NULL, *m2 = NULL;
int counter = 0;
- int if_loopback;
assert(sd_rtnl_open(0, &rtnl) >= 0);
- if_loopback = (int) if_nametoindex("lo");
- assert(if_loopback > 0);
-
- assert(sd_rtnl_message_link_new(RTM_GETLINK, if_loopback, 0, 0, &m1) >= 0);
- assert(sd_rtnl_message_link_new(RTM_GETLINK, if_loopback, 0, 0, &m2) >= 0);
+ assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, 0, 0, &m1) >= 0);
+ assert(sd_rtnl_message_link_new(RTM_GETLINK, ifindex, 0, 0, &m2) >= 0);
counter ++;
assert(sd_rtnl_call_async(rtnl, m1, &pipe_handler, &counter, 0, NULL) >= 0);
@@ -203,16 +220,18 @@ int main(void) {
test_route();
- test_async();
-
- test_pipe();
-
assert(sd_rtnl_open(0, &rtnl) >= 0);
assert(rtnl);
if_loopback = (int) if_nametoindex("lo");
assert(if_loopback > 0);
+ test_async(if_loopback);
+
+ test_pipe(if_loopback);
+
+ test_event_loop(if_loopback);
+
test_link_configure(rtnl, if_loopback);
assert(sd_rtnl_message_link_new(RTM_GETLINK, if_loopback, 0, 0, &m) >= 0);
@@ -260,6 +279,8 @@ int main(void) {
}
}
+ assert(sd_rtnl_flush(rtnl) >= 0);
+
assert((m = sd_rtnl_message_unref(m)) == NULL);
assert((r = sd_rtnl_message_unref(r)) == NULL);
assert((rtnl = sd_rtnl_unref(rtnl)) == NULL);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-14 18:23:36 +0000