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-rw-r--r--src/network/networkd-link.c72
-rw-r--r--src/network/networkd.c5
-rw-r--r--src/network/networkd.h6
-rw-r--r--src/network/sd-network.c237
4 files changed, 320 insertions, 0 deletions
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index b217123ecc..f09fb7546d 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -28,6 +28,8 @@
#include "bus-util.h"
#include "net-util.h"
+#include "dhcp-lease-internal.h"
+
int link_new(Manager *manager, struct udev_device *device, Link **ret) {
_cleanup_link_free_ Link *link = NULL;
const char *mac;
@@ -51,6 +53,11 @@ int link_new(Manager *manager, struct udev_device *device, Link **ret) {
if (link->ifindex <= 0)
return -EINVAL;
+ r = asprintf(&link->state_file, "/run/systemd/network/links/%u",
+ (unsigned) link->ifindex);
+ if (r < 0)
+ return r;
+
mac = udev_device_get_sysattr_value(device, "address");
if (mac) {
mac_addr = ether_aton(mac);
@@ -83,6 +90,7 @@ void link_free(Link *link) {
hashmap_remove(link->manager->links, &link->ifindex);
free(link->ifname);
+ free(link->state_file);
free(link);
}
@@ -139,6 +147,8 @@ static int link_enter_configured(Link *link) {
link->state = LINK_STATE_CONFIGURED;
+ link_save(link);
+
return 0;
}
@@ -148,6 +158,8 @@ static void link_enter_failed(Link *link) {
log_warning_link(link, "failed");
link->state = LINK_STATE_FAILED;
+
+ link_save(link);
}
static int route_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
@@ -900,6 +912,8 @@ static int link_enter_enslave(Link *link) {
link->state = LINK_STATE_ENSLAVING;
+ link_save(link);
+
if (!link->network->bridge && !link->network->bond &&
hashmap_isempty(link->network->vlans) &&
hashmap_isempty(link->network->macvlans))
@@ -1066,3 +1080,61 @@ int link_update(Link *link, sd_rtnl_message *m) {
return link_update_flags(link, flags);
}
+
+int link_save(Link *link) {
+ _cleanup_free_ char *temp_path = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ int r;
+
+ assert(link);
+ assert(link->state_file);
+
+ r = mkdir_safe_label("/run/systemd/network/links", 0755, 0, 0);
+ if (r < 0)
+ goto finish;
+
+ r = fopen_temporary(link->state_file, &f, &temp_path);
+ if (r < 0)
+ goto finish;
+
+ fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "# This is private data. Do not parse.\n"
+ "STATE=%s\n",
+ link_state_to_string(link->state));
+
+ if (link->dhcp_lease) {
+ const char *lease_file = "/run/systemd/network/leases/test.lease";
+
+ r = dhcp_lease_save(link->dhcp_lease, lease_file);
+ if (r < 0)
+ goto finish;
+
+ fprintf(f, "DHCP_LEASE=%s\n", lease_file);
+ }
+
+ fflush(f);
+
+ if (ferror(f) || rename(temp_path, link->state_file) < 0) {
+ r = -errno;
+ unlink(link->state_file);
+ unlink(temp_path);
+ }
+
+finish:
+ if (r < 0)
+ log_error("Failed to save link data %s: %s", link->state_file, strerror(-r));
+
+ return r;
+}
+
+static const char* const link_state_table[_LINK_STATE_MAX] = {
+ [LINK_STATE_ENSLAVING] = "configuring",
+ [LINK_STATE_SETTING_ADDRESSES] = "configuring",
+ [LINK_STATE_SETTING_ROUTES] = "configuring",
+ [LINK_STATE_CONFIGURED] = "configured",
+ [LINK_STATE_FAILED] = "failed",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
diff --git a/src/network/networkd.c b/src/network/networkd.c
index 00e9a5f3da..a80740bbea 100644
--- a/src/network/networkd.c
+++ b/src/network/networkd.c
@@ -40,6 +40,11 @@ int main(int argc, char *argv[]) {
goto out;
}
+ /* Always create the directories people can create inotify
+ * watches in. */
+ mkdir_label("/run/systemd/network/links", 0755);
+ mkdir_label("/run/systemd/network/leases", 0755);
+
r = manager_new(&m);
if (r < 0) {
log_error("Could not create manager: %s", strerror(-r));
diff --git a/src/network/networkd.h b/src/network/networkd.h
index 85c300982f..e9c0dd5121 100644
--- a/src/network/networkd.h
+++ b/src/network/networkd.h
@@ -189,6 +189,7 @@ struct Link {
uint64_t ifindex;
char *ifname;
+ char *state_file;
struct ether_addr mac;
unsigned flags;
@@ -354,6 +355,11 @@ int link_configure(Link *link);
int link_update(Link *link, sd_rtnl_message *message);
+int link_save(Link *link);
+
+const char* link_state_to_string(LinkState s) _const_;
+LinkState link_state_from_string(const char *s) _pure_;
+
DEFINE_TRIVIAL_CLEANUP_FUNC(Link*, link_free);
#define _cleanup_link_free_ _cleanup_(link_freep)
diff --git a/src/network/sd-network.c b/src/network/sd-network.c
new file mode 100644
index 0000000000..7469873664
--- /dev/null
+++ b/src/network/sd-network.c
@@ -0,0 +1,237 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2011 Lennart Poettering
+ Copyright 2014 Tom Gundersen
+
+ systemd 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.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/inotify.h>
+#include <sys/poll.h>
+
+#include "util.h"
+#include "macro.h"
+#include "strv.h"
+#include "fileio.h"
+#include "sd-network.h"
+#include "dhcp-lease-internal.h"
+
+_public_ int sd_network_get_link_state(unsigned index, char **state) {
+ char *p, *s = NULL;
+ int r;
+
+ assert_return(index, -EINVAL);
+ assert_return(state, -EINVAL);
+
+ if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "STATE", &s, NULL);
+ free(p);
+
+ if (r == -ENOENT) {
+ free(s);
+ s = strdup("unknown");
+ if (!s)
+ return -ENOMEM;
+
+ *state = s;
+ return 0;
+ } else if (r < 0) {
+ free(s);
+ return r;
+ } else if (!s)
+ return -EIO;
+
+ *state = s;
+ return 0;
+}
+
+_public_ int sd_network_get_dhcp_lease(unsigned index, sd_dhcp_lease **ret) {
+ sd_dhcp_lease *lease;
+ char *p, *s = NULL;
+ int r;
+
+ assert_return(index, -EINVAL);
+ assert_return(ret, -EINVAL);
+
+ if (asprintf(&p, "/run/systemd/network/links/%u", index) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE, "DHCP_LEASE", &s, NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+ return r;
+ } else if (!s)
+ return -EIO;
+
+ r = dhcp_lease_load(s, &lease);
+ if (r < 0)
+ return r;
+
+ *ret = lease;
+
+ return 0;
+}
+
+_public_ int sd_network_get_ifindices(unsigned **indices) {
+ _cleanup_closedir_ DIR *d;
+ int r = 0;
+ unsigned n = 0;
+ _cleanup_free_ uid_t *l = NULL;
+
+ d = opendir("/run/systemd/network/links/");
+ if (!d)
+ return -errno;
+
+ for (;;) {
+ struct dirent *de;
+ int k;
+ unsigned index;
+
+ errno = 0;
+ de = readdir(d);
+ if (!de && errno != 0)
+ return -errno;
+
+ if (!de)
+ break;
+
+ dirent_ensure_type(d, de);
+
+ if (!dirent_is_file(de))
+ continue;
+
+ k = safe_atou(de->d_name, &index);
+ if (k < 0)
+ continue;
+
+ if (indices) {
+ if ((unsigned) r >= n) {
+ unsigned *t;
+
+ n = MAX(16, 2*r);
+ t = realloc(l, sizeof(unsigned) * n);
+ if (!t)
+ return -ENOMEM;
+
+ l = t;
+ }
+
+ assert((unsigned) r < n);
+ l[r++] = index;
+ } else
+ r++;
+ }
+
+ if (indices) {
+ *indices = l;
+ l = NULL;
+ }
+
+ return r;
+}
+
+static inline int MONITOR_TO_FD(sd_network_monitor *m) {
+ return (int) (unsigned long) m - 1;
+}
+
+static inline sd_network_monitor* FD_TO_MONITOR(int fd) {
+ return (sd_network_monitor*) (unsigned long) (fd + 1);
+}
+
+_public_ int sd_network_monitor_new(const char *category, sd_network_monitor **m) {
+ int fd, k;
+ bool good = false;
+
+ assert_return(m, -EINVAL);
+
+ fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC);
+ if (fd < 0)
+ return -errno;
+
+ if (!category || streq(category, "netif")) {
+ k = inotify_add_watch(fd, "/run/systemd/network/links/", IN_MOVED_TO|IN_DELETE);
+ if (k < 0) {
+ close_nointr_nofail(fd);
+ return -errno;
+ }
+
+ good = true;
+ }
+
+ if (!good) {
+ close_nointr(fd);
+ return -EINVAL;
+ }
+
+ *m = FD_TO_MONITOR(fd);
+ return 0;
+}
+
+_public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
+ int fd;
+
+ assert_return(m, NULL);
+
+ fd = MONITOR_TO_FD(m);
+ close_nointr(fd);
+
+ return NULL;
+}
+
+_public_ int sd_network_monitor_flush(sd_network_monitor *m) {
+
+ assert_return(m, -EINVAL);
+
+ return flush_fd(MONITOR_TO_FD(m));
+}
+
+_public_ int sd_network_monitor_get_fd(sd_network_monitor *m) {
+
+ assert_return(m, -EINVAL);
+
+ return MONITOR_TO_FD(m);
+}
+
+_public_ int sd_network_monitor_get_events(sd_network_monitor *m) {
+
+ assert_return(m, -EINVAL);
+
+ /* For now we will only return POLLIN here, since we don't
+ * need anything else ever for inotify. However, let's have
+ * this API to keep our options open should we later on need
+ * it. */
+ return POLLIN;
+}
+
+_public_ int sd_network_monitor_get_timeout(sd_network_monitor *m, uint64_t *timeout_usec) {
+
+ assert_return(m, -EINVAL);
+ assert_return(timeout_usec, -EINVAL);
+
+ /* For now we will only return (uint64_t) -1, since we don't
+ * need any timeout. However, let's have this API to keep our
+ * options open should we later on need it. */
+ *timeout_usec = (uint64_t) -1;
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-03 14:44:18 +0000