#include "networkd.h"
#include "libudev-private.h"
+#include "udev-util.h"
#include "util.h"
+#include "virt.h"
#include "bus-util.h"
#include "network-internal.h"
static int ipv4ll_address_update(Link *link, bool deprecate);
static bool ipv4ll_is_bound(sd_ipv4ll *ll);
-int link_new(Manager *manager, struct udev_device *device, Link **ret) {
+static int link_new(Manager *manager, sd_rtnl_message *message, Link **ret) {
_cleanup_link_free_ Link *link = NULL;
- const char *ifname;
- int r;
+ uint16_t type;
+ char *ifname;
+ int r, ifindex;
assert(manager);
assert(manager->links);
- assert(device);
+ assert(message);
assert(ret);
+ r = sd_rtnl_message_get_type(message, &type);
+ if (r < 0)
+ return r;
+ else if (type != RTM_NEWLINK)
+ return -EINVAL;
+
+ r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
+ if (r < 0)
+ return r;
+ else if (ifindex <= 0)
+ return -EINVAL;
+
+ r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &ifname);
+ if (r < 0)
+ return r;
+
link = new0(Link, 1);
if (!link)
return -ENOMEM;
link->manager = manager;
- link->state = _LINK_STATE_INVALID;
-
- link->ifindex = udev_device_get_ifindex(device);
- if (link->ifindex <= 0)
- return -EINVAL;
+ link->state = LINK_STATE_INITIALIZING;
+ link->ifindex = ifindex;
+ link->ifname = strdup(ifname);
+ if (!link->ifname)
+ return -ENOMEM;
r = asprintf(&link->state_file, "/run/systemd/network/links/%"PRIu64,
link->ifindex);
if (r < 0)
return -ENOMEM;
- ifname = udev_device_get_sysname(device);
- link->ifname = strdup(ifname);
-
r = hashmap_put(manager->links, &link->ifindex, link);
if (r < 0)
return r;
- link->udev_device = udev_device_ref(device);
-
*ret = link;
link = NULL;
static int link_update_flags(Link *link, unsigned flags) {
unsigned flags_added, flags_removed, generic_flags;
+ bool carrier_gained, carrier_lost;
int r;
assert(link);
- assert(link->network);
if (link->state == LINK_STATE_FAILED)
return 0;
flags_removed = (link->flags ^ flags) & link->flags;
generic_flags = ~(IFF_UP | IFF_LOWER_UP | IFF_RUNNING);
- if (flags_added & generic_flags)
- log_debug_link(link, "link flags gained: %#.8x",
- flags_added & generic_flags);
+ /* consider link to have carrier when both RUNNING and LOWER_UP, as RUNNING
+ may mean that the oper state is unknown, in which case we should fall back to
+ simply trust LOWER_UP, even thought that is less reliable
+ */
+ carrier_gained = ((flags_added & IFF_LOWER_UP) && (flags & IFF_RUNNING)) ||
+ ((flags_added & IFF_RUNNING) && (flags & IFF_LOWER_UP));
+ carrier_lost = ((link->flags & (IFF_RUNNING | IFF_LOWER_UP)) ==
+ (IFF_RUNNING | IFF_LOWER_UP)) &&
+ (flags_removed & (IFF_LOWER_UP | IFF_RUNNING));
- if (flags_removed & generic_flags)
- log_debug_link(link, "link flags lost: %#.8x",
- flags_removed & generic_flags);
+ link->flags = flags;
+
+ if (!link->network)
+ /* not currently managing this link
+ we track state changes, but don't log them
+ they will be logged if and when a network is
+ applied */
+ return 0;
if (flags_added & IFF_UP)
log_info_link(link, "link is up");
log_info_link(link, "link is down");
if (flags_added & IFF_LOWER_UP)
- log_info_link(link, "carrier on");
+ log_debug_link(link, "link is lower up");
else if (flags_removed & IFF_LOWER_UP)
- log_info_link(link, "carrier off");
+ log_debug_link(link, "link is lower down");
+
+ if (flags_added & IFF_RUNNING)
+ log_debug_link(link, "link is running");
+ else if (flags_removed & IFF_RUNNING)
+ log_debug_link(link, "link is not running");
+
+ if (flags_added & generic_flags)
+ log_debug_link(link, "ignored link flags gained: %#.8x",
+ flags_added & generic_flags);
+ if (flags_removed & generic_flags)
+ log_debug_link(link, "ignored link flags lost: %#.8x",
+ flags_removed & generic_flags);
- if (flags_added & IFF_RUNNING) {
- log_info_link(link, "running");
+ if (carrier_gained) {
+ log_info_link(link, "gained carrier");
if (link->network->dhcp || link->network->ipv4ll) {
r = link_acquire_conf(link);
return r;
}
}
- } else if (flags_removed & IFF_RUNNING) {
- log_info_link(link, "not running");
+ } else if (carrier_lost) {
+ log_info_link(link, "lost carrier");
if (link->network->dhcp) {
r = sd_dhcp_client_stop(link->dhcp_client);
}
}
- link->flags = flags;
-
return 0;
}
assert(link->state == LINK_STATE_ENSLAVING);
assert(link->network);
- r = link_up(link);
- if (r < 0) {
- link_enter_failed(link);
- return r;
+ if (!(link->flags & IFF_UP)) {
+ r = link_up(link);
+ if (r < 0) {
+ link_enter_failed(link);
+ return r;
+ }
}
if (!link->network->dhcp && !link->network->ipv4ll)
assert(link);
assert(link->network);
- assert(link->state == _LINK_STATE_INVALID);
+ assert(link->state == LINK_STATE_INITIALIZING);
link->state = LINK_STATE_ENSLAVING;
return 0;
}
-static int link_getlink_handler(sd_rtnl *rtnl, sd_rtnl_message *m,
- void *userdata) {
- Link *link = userdata;
- int r;
-
- assert(link);
- assert(link->ifname);
-
- if (link->state == LINK_STATE_FAILED)
- return 1;
-
- r = sd_rtnl_message_get_errno(m);
- if (r < 0) {
- log_struct_link(LOG_ERR, link,
- "MESSAGE=%s: could not get state: %s",
- link->ifname, strerror(-r),
- "ERRNO=%d", -r,
- NULL);
- link_enter_failed(link);
- return 1;
- }
-
- link_update(link, m);
-
- return 1;
-}
-
-static int link_getlink(Link *link) {
- _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL;
- int r;
-
- assert(link);
- assert(link->manager);
- assert(link->manager->rtnl);
-
- log_debug_link(link, "requesting link status");
-
- r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
- RTM_GETLINK, link->ifindex);
- if (r < 0) {
- log_error_link(link, "Could not allocate RTM_GETLINK message");
- return r;
- }
-
- r = sd_rtnl_call_async(link->manager->rtnl, req, link_getlink_handler,
- link, 0, NULL);
- if (r < 0) {
- log_error_link(link,
- "Could not send rtnetlink message: %s", strerror(-r));
- return r;
- }
-
- return 0;
-}
-
static int link_configure(Link *link) {
int r;
assert(link);
- assert(link->state == _LINK_STATE_INVALID);
-
- r = link_getlink(link);
- if (r < 0)
- return r;
-
- return link_enter_enslave(link);
-}
-
-int link_add(Manager *m, struct udev_device *device, Link **ret) {
- Link *link = NULL;
- Network *network;
- int r;
-
- assert(m);
- assert(device);
-
- r = link_new(m, device, &link);
- if (r < 0)
- return r;
-
- *ret = link;
-
- r = network_get(m, device, &network);
- if (r < 0)
- return r == -ENOENT ? 0 : r;
-
- r = network_apply(m, network, link);
- if (r < 0)
- return r;
+ assert(link->state == LINK_STATE_INITIALIZING);
if (link->network->ipv4ll) {
uint8_t seed[8];
if (r < 0)
return r;
- r = net_get_unique_predictable_data(link->udev_device, seed);
- if (r >= 0) {
- r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
- if (r < 0)
- return r;
+ if (link->udev_device) {
+ r = net_get_unique_predictable_data(link->udev_device, seed);
+ if (r >= 0) {
+ r = sd_ipv4ll_set_address_seed(link->ipv4ll, seed);
+ if (r < 0)
+ return r;
+ }
}
r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
}
}
+ return link_enter_enslave(link);
+}
+
+int link_initialized(Link *link, struct udev_device *device) {
+ Network *network;
+ unsigned flags;
+ int r;
+
+ assert(link);
+ assert(link->ifname);
+ assert(link->manager);
+
+ if (link->state != LINK_STATE_INITIALIZING)
+ return 0;
+
+ if (device)
+ link->udev_device = udev_device_ref(device);
+
+ log_debug_link(link, "link initialized");
+
+ r = network_get(link->manager, device, link->ifname, &link->mac, &network);
+ if (r < 0)
+ return r == -ENOENT ? 0 : r;
+
+ r = network_apply(link->manager, network, link);
+ if (r < 0)
+ return r;
+
r = link_configure(link);
if (r < 0)
return r;
+ /* re-trigger all state updates */
+ flags = link->flags;
+ link->flags = 0;
+ r = link_update_flags(link, flags);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
+ Link *link;
+ _cleanup_udev_device_unref_ struct udev_device *device = NULL;
+ char ifindex_str[2 + DECIMAL_STR_MAX(int)];
+ int r;
+
+ assert(m);
+ assert(message);
+ assert(ret);
+
+ r = link_new(m, message, ret);
+ if (r < 0)
+ return r;
+
+ link = *ret;
+
+ log_info_link(link, "link added");
+
+ if (detect_container(NULL) <= 0) {
+ /* not in a container, udev will be around */
+ sprintf(ifindex_str, "n%"PRIu64, link->ifindex);
+ device = udev_device_new_from_device_id(m->udev, ifindex_str);
+ if (!device) {
+ log_warning_link(link, "could not find udev device");
+ return -errno;
+ }
+
+ if (udev_device_get_is_initialized(device) <= 0)
+ /* not yet ready */
+ return 0;
+ }
+
+ r = link_initialized(link, device);
+ if (r < 0)
+ return r;
+
return 0;
}
int r;
assert(link);
- assert(link->network);
assert(m);
if (link->state == LINK_STATE_FAILED)
return 0;
- if (link->network->dhcp && link->network->dhcp_mtu &&
- !link->original_mtu) {
+ if (!link->original_mtu) {
r = sd_rtnl_message_read_u16(m, IFLA_MTU, &link->original_mtu);
if (r >= 0)
log_debug_link(link, "saved original MTU: %"
PRIu16, link->original_mtu);
}
+ /* The kernel may broadcast NEWLINK messages without the MAC address
+ set, simply ignore them. */
r = sd_rtnl_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
- if (r < 0)
- log_debug_link(link, "Could not get MAC address: %s", strerror(-r));
- else {
+ if (r >= 0) {
if (memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN)) {
memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
}
static const char* const link_state_table[_LINK_STATE_MAX] = {
+ [LINK_STATE_INITIALIZING] = "configuring",
[LINK_STATE_ENSLAVING] = "configuring",
[LINK_STATE_SETTING_ADDRESSES] = "configuring",
[LINK_STATE_SETTING_ROUTES] = "configuring",
~ianmdlvl / elogind.git / blobdiff