X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fnetwork%2Fnetworkd-manager.c;h=6aab42756441a51fa6a1e69c8d1c24d8c0e78475;hp=1b14e9d4f11ffa0014d51258720c1fea6a70bf0b;hb=bfcdba8d565041275319e5b1605c543d243ad7c4;hpb=e16cb2e4efaba83f47da8355adc65fd83bbe8327
diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 1b14e9d4f..6aab42756 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -19,12 +19,14 @@
along with systemd; If not, see .
***/
-#include
+#include
#include
-#include
+#include "conf-parser.h"
#include "path-util.h"
#include "networkd.h"
+#include "networkd-netdev.h"
+#include "networkd-link.h"
#include "network-internal.h"
#include "libudev-private.h"
#include "udev-util.h"
@@ -34,6 +36,9 @@
#include "sd-rtnl.h"
+/* use 8 MB for receive socket kernel queue. */
+#define RCVBUF_SIZE (8*1024*1024)
+
const char* const network_dirs[] = {
"/etc/systemd/network",
"/run/systemd/network",
@@ -43,69 +48,29 @@ const char* const network_dirs[] = {
#endif
NULL};
-static int dispatch_sigterm(sd_event_source *es, const struct signalfd_siginfo *si, void *userdata) {
- Manager *m = userdata;
-
- assert(m);
-
- log_received_signal(LOG_INFO, si);
-
- sd_event_exit(m->event, 0);
- return 0;
-}
-
-static int setup_signals(Manager *m) {
- sigset_t mask;
+static int setup_default_address_pool(Manager *m) {
+ AddressPool *p;
int r;
assert(m);
- assert_se(sigemptyset(&mask) == 0);
- sigset_add_many(&mask, SIGINT, SIGTERM, -1);
- assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
+ /* Add in the well-known private address ranges. */
- r = sd_event_add_signal(m->event, &m->sigterm_event_source, SIGTERM, dispatch_sigterm, m);
+ r = address_pool_new_from_string(m, &p, AF_INET6, "fc00::", 7);
if (r < 0)
return r;
- r = sd_event_add_signal(m->event, &m->sigint_event_source, SIGINT, dispatch_sigterm, m);
+ r = address_pool_new_from_string(m, &p, AF_INET, "192.168.0.0", 16);
if (r < 0)
return r;
- return 0;
-}
-
-static int set_fallback_dns(Manager *m, const char *string) {
- char *word, *state;
- size_t length;
- int r;
-
- assert(m);
- assert(string);
-
- FOREACH_WORD_QUOTED(word, length, string, state) {
- _cleanup_address_free_ Address *address = NULL;
- Address *tail;
- _cleanup_free_ char *addrstr = NULL;
-
- r = address_new_dynamic(&address);
- if (r < 0)
- return r;
-
- addrstr = strndup(word, length);
- if (!addrstr)
- return -ENOMEM;
-
- r = net_parse_inaddr(addrstr, &address->family, &address->in_addr);
- if (r < 0) {
- log_debug("Ignoring invalid DNS address '%s'", addrstr);
- continue;
- }
+ r = address_pool_new_from_string(m, &p, AF_INET, "172.16.0.0", 12);
+ if (r < 0)
+ return r;
- LIST_FIND_TAIL(addresses, m->fallback_dns, tail);
- LIST_INSERT_AFTER(addresses, m->fallback_dns, tail, address);
- address = NULL;
- }
+ r = address_pool_new_from_string(m, &p, AF_INET, "10.0.0.0", 8);
+ if (r < 0)
+ return r;
return 0;
}
@@ -118,31 +83,30 @@ int manager_new(Manager **ret) {
if (!m)
return -ENOMEM;
- m->state_file = strdup("/run/systemd/network/state");
+ m->state_file = strdup("/run/systemd/netif/state");
if (!m->state_file)
return -ENOMEM;
- r = set_fallback_dns(m, DNS_SERVERS);
- if (r < 0)
- return r;
-
r = sd_event_default(&m->event);
if (r < 0)
return r;
sd_event_set_watchdog(m->event, true);
+ sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL);
+ sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL);
+
r = sd_rtnl_open(&m->rtnl, 3, RTNLGRP_LINK, RTNLGRP_IPV4_IFADDR,
RTNLGRP_IPV6_IFADDR);
if (r < 0)
return r;
- r = sd_bus_default_system(&m->bus);
- if (r < 0 && r != -ENOENT) /* TODO: drop when we can rely on kdbus */
+ r = sd_rtnl_inc_rcvbuf(m->rtnl, RCVBUF_SIZE);
+ if (r < 0)
return r;
- r = setup_signals(m);
- if (r < 0)
+ r = sd_bus_default_system(&m->bus);
+ if (r < 0 && r != -ENOENT) /* TODO: drop when we can rely on kdbus */
return r;
/* udev does not initialize devices inside containers,
@@ -158,20 +122,16 @@ int manager_new(Manager **ret) {
return -ENOMEM;
}
- m->kmod_ctx = kmod_new(NULL, NULL);
- if (!m->kmod_ctx)
- return -ENOMEM;
-
- m->links = hashmap_new(uint64_hash_func, uint64_compare_func);
- if (!m->links)
- return -ENOMEM;
-
- m->netdevs = hashmap_new(string_hash_func, string_compare_func);
+ m->netdevs = hashmap_new(&string_hash_ops);
if (!m->netdevs)
return -ENOMEM;
LIST_HEAD_INIT(m->networks);
+ r = setup_default_address_pool(m);
+ if (r < 0)
+ return r;
+
*ret = m;
m = NULL;
@@ -182,19 +142,17 @@ void manager_free(Manager *m) {
Network *network;
NetDev *netdev;
Link *link;
+ AddressPool *pool;
if (!m)
return;
free(m->state_file);
- kmod_unref(m->kmod_ctx);
udev_monitor_unref(m->udev_monitor);
udev_unref(m->udev);
sd_bus_unref(m->bus);
sd_event_source_unref(m->udev_event_source);
- sd_event_source_unref(m->sigterm_event_source);
- sd_event_source_unref(m->sigint_event_source);
sd_event_unref(m->event);
while ((link = hashmap_first(m->links)))
@@ -208,6 +166,9 @@ void manager_free(Manager *m) {
netdev_unref(netdev);
hashmap_free(m->netdevs);
+ while ((pool = m->address_pools))
+ address_pool_free(pool);
+
sd_rtnl_unref(m->rtnl);
free(m);
@@ -268,29 +229,40 @@ static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, vo
Link *link = NULL;
NetDev *netdev = NULL;
uint16_t type;
- char *name;
+ const char *name;
int r, ifindex;
assert(rtnl);
assert(message);
assert(m);
+ if (sd_rtnl_message_is_error(message)) {
+ r = sd_rtnl_message_get_errno(message);
+ if (r < 0)
+ log_warning_errno(r, "rtnl: could not receive link: %m");
+
+ return 0;
+ }
+
r = sd_rtnl_message_get_type(message, &type);
if (r < 0) {
- log_warning("rtnl: could not get message type");
+ log_warning_errno(r, "rtnl: could not get message type: %m");
return 0;
}
r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
- if (r < 0 || ifindex <= 0) {
- log_warning("rtnl: received link message without valid ifindex");
+ if (r < 0) {
+ log_warning_errno(r, "rtnl: could not get ifindex: %m");
+ return 0;
+ } else if (ifindex <= 0) {
+ log_warning("rtnl: received link message with invalid ifindex: %d", ifindex);
return 0;
} else
link_get(m, ifindex, &link);
r = sd_rtnl_message_read_string(message, IFLA_IFNAME, &name);
- if (r < 0 || !name) {
- log_warning("rtnl: received link message without valid ifname");
+ if (r < 0) {
+ log_warning_errno(r, "rtnl: received link message without ifname: %m");
return 0;
} else
netdev_get(m, name, &netdev);
@@ -301,7 +273,7 @@ static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, vo
/* link is new, so add it */
r = link_add(m, message, &link);
if (r < 0) {
- log_debug("could not add new link");
+ log_warning_errno(r, "could not add new link: %m");
return 0;
}
}
@@ -310,7 +282,7 @@ static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, vo
/* netdev exists, so make sure the ifindex matches */
r = netdev_set_ifindex(netdev, message);
if (r < 0) {
- log_debug("could not set ifindex on netdev");
+ log_warning_errno(r, "could not set ifindex on netdev: %m");
return 0;
}
}
@@ -337,7 +309,7 @@ static int manager_rtnl_process_link(sd_rtnl *rtnl, sd_rtnl_message *message, vo
int manager_rtnl_enumerate_links(Manager *m) {
_cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
sd_rtnl_message *link;
- int r, k;
+ int r;
assert(m);
assert(m->rtnl);
@@ -355,16 +327,40 @@ int manager_rtnl_enumerate_links(Manager *m) {
return r;
for (link = reply; link; link = sd_rtnl_message_next(link)) {
- uint16_t type;
+ int k;
- k = sd_rtnl_message_get_type(link, &type);
+ k = manager_rtnl_process_link(m->rtnl, link, m);
if (k < 0)
- return k;
+ r = k;
+ }
- if (type != RTM_NEWLINK)
- continue;
+ return r;
+}
- k = manager_rtnl_process_link(m->rtnl, link, m);
+int manager_rtnl_enumerate_addresses(Manager *m) {
+ _cleanup_rtnl_message_unref_ sd_rtnl_message *req = NULL, *reply = NULL;
+ sd_rtnl_message *addr;
+ int r;
+
+ assert(m);
+ assert(m->rtnl);
+
+ r = sd_rtnl_message_new_addr(m->rtnl, &req, RTM_GETADDR, 0, 0);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_message_request_dump(req, true);
+ if (r < 0)
+ return r;
+
+ r = sd_rtnl_call(m->rtnl, req, 0, &reply);
+ if (r < 0)
+ return r;
+
+ for (addr = reply; addr; addr = sd_rtnl_message_next(addr)) {
+ int k;
+
+ k = link_rtnl_process_address(m->rtnl, addr, m);
if (k < 0)
r = k;
}
@@ -394,10 +390,8 @@ int manager_udev_listen(Manager *m) {
assert(m->udev_monitor);
r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_monitor, "net", NULL);
- if (r < 0) {
- log_error("Could not add udev monitor filter: %s", strerror(-r));
- return r;
- }
+ if (r < 0)
+ return log_error_errno(r, "Could not add udev monitor filter: %m");
r = udev_monitor_enable_receiving(m->udev_monitor);
if (r < 0) {
@@ -413,12 +407,18 @@ int manager_udev_listen(Manager *m) {
if (r < 0)
return r;
+ r = sd_event_source_set_description(m->udev_event_source, "networkd-udev");
+ if (r < 0)
+ return r;
+
return 0;
}
int manager_rtnl_listen(Manager *m) {
int r;
+ assert(m);
+
r = sd_rtnl_attach_event(m->rtnl, m->event, 0);
if (r < 0)
return r;
@@ -457,151 +457,200 @@ int manager_bus_listen(Manager *m) {
return 0;
}
-static void append_dns(FILE *f, struct in_addr *dns, unsigned char family, unsigned *count) {
- char buf[INET6_ADDRSTRLEN];
- const char *address;
-
- address = inet_ntop(family, dns, buf, INET6_ADDRSTRLEN);
- if (!address) {
- log_warning("Invalid DNS address. Ignoring.");
- return;
- }
-
- if (*count == MAXNS)
- fputs("# Too many DNS servers configured, the following entries "
- "will be ignored\n", f);
-
- fprintf(f, "nameserver %s\n", address);
-
- (*count) ++;
-}
-
-int manager_update_resolv_conf(Manager *m) {
- _cleanup_free_ char *temp_path = NULL;
- _cleanup_fclose_ FILE *f = NULL;
- Link *link;
- Iterator i;
- unsigned count = 0;
- const char *domainname = NULL;
+static int set_put_in_addr(Set *s, const struct in_addr *address) {
+ char *p;
int r;
- assert(m);
+ assert(s);
- r = fopen_temporary("/run/systemd/network/resolv.conf", &f, &temp_path);
+ r = in_addr_to_string(AF_INET, (const union in_addr_union*) address, &p);
if (r < 0)
return r;
- fchmod(fileno(f), 0644);
+ r = set_consume(s, p);
+ if (r == -EEXIST)
+ return 0;
- fputs("# This file is managed by systemd-networkd(8). Do not edit.\n#\n"
- "# Third party programs must not access this file directly, but\n"
- "# only through the symlink at /etc/resolv.conf. To manage\n"
- "# resolv.conf(5) in a different way, replace the symlink by a\n"
- "# static file or a different symlink.\n\n", f);
+ return r;
+}
- HASHMAP_FOREACH(link, m->links, i) {
- if (link->dhcp_lease) {
- struct in_addr *nameservers;
- size_t nameservers_size;
-
- if (link->network->dhcp_dns) {
- r = sd_dhcp_lease_get_dns(link->dhcp_lease, &nameservers, &nameservers_size);
- if (r >= 0) {
- unsigned j;
-
- for (j = 0; j < nameservers_size; j++)
- append_dns(f, &nameservers[j], AF_INET, &count);
- }
- }
+static int set_put_in_addrv(Set *s, const struct in_addr *addresses, int n) {
+ int r, i, c = 0;
- if (link->network->dhcp_domainname && !domainname) {
- r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
- if (r >= 0)
- fprintf(f, "domain %s\n", domainname);
- }
- }
- }
+ assert(s);
+ assert(n <= 0 || addresses);
- HASHMAP_FOREACH(link, m->links, i) {
- if (link->network && link->network->dns) {
- Address *address;
- Iterator j;
+ for (i = 0; i < n; i++) {
+ r = set_put_in_addr(s, addresses+i);
+ if (r < 0)
+ return r;
- SET_FOREACH(address, link->network->dns, j) {
- append_dns(f, &address->in_addr.in,
- address->family, &count);
- }
- }
+ c += r;
}
- if (!count) {
- Address *address;
+ return c;
+}
- LIST_FOREACH(addresses, address, m->fallback_dns)
- append_dns(f, &address->in_addr.in,
- address->family, &count);
- }
+static void print_string_set(FILE *f, const char *field, Set *s) {
+ bool space = false;
+ Iterator i;
+ char *p;
- fflush(f);
+ if (set_isempty(s))
+ return;
- if (ferror(f) || rename(temp_path, "/run/systemd/network/resolv.conf") < 0) {
- r = -errno;
- unlink("/run/systemd/network/resolv.conf");
- unlink(temp_path);
- return r;
- }
+ fputs(field, f);
- return 0;
+ SET_FOREACH(p, s, i) {
+ if (space)
+ fputc(' ', f);
+ fputs(p, f);
+ space = true;
+ }
+ fputc('\n', f);
}
int manager_save(Manager *m) {
+ _cleanup_set_free_free_ Set *dns = NULL, *ntp = NULL, *domains = NULL;
Link *link;
Iterator i;
_cleanup_free_ char *temp_path = NULL;
_cleanup_fclose_ FILE *f = NULL;
- const char *oper_state = "unknown";
- bool dormant = false, carrier = false;
+ LinkOperationalState operstate = LINK_OPERSTATE_OFF;
+ const char *operstate_str;
int r;
assert(m);
assert(m->state_file);
+ /* We add all NTP and DNS server to a set, to filter out duplicates */
+ dns = set_new(&string_hash_ops);
+ if (!dns)
+ return -ENOMEM;
+
+ ntp = set_new(&string_hash_ops);
+ if (!ntp)
+ return -ENOMEM;
+
+ domains = set_new(&string_hash_ops);
+ if (!domains)
+ return -ENOMEM;
+
HASHMAP_FOREACH(link, m->links, i) {
if (link->flags & IFF_LOOPBACK)
continue;
- if (link_has_carrier(link->flags, link->operstate))
- carrier = true;
- else if (link->operstate == IF_OPER_DORMANT)
- dormant = true;
+ if (link->operstate > operstate)
+ operstate = link->operstate;
+
+ if (!link->network)
+ continue;
+
+ /* First add the static configured entries */
+ r = set_put_strdupv(dns, link->network->dns);
+ if (r < 0)
+ return r;
+
+ r = set_put_strdupv(ntp, link->network->ntp);
+ if (r < 0)
+ return r;
+
+ r = set_put_strdupv(domains, link->network->domains);
+ if (r < 0)
+ return r;
+
+ if (!link->dhcp_lease)
+ continue;
+
+ /* Secondly, add the entries acquired via DHCP */
+ if (link->network->dhcp_dns) {
+ const struct in_addr *addresses;
+
+ r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
+ if (r > 0) {
+ r = set_put_in_addrv(dns, addresses, r);
+ if (r < 0)
+ return r;
+ } else if (r < 0 && r != -ENOENT)
+ return r;
+ }
+
+ if (link->network->dhcp_ntp) {
+ const struct in_addr *addresses;
+
+ r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
+ if (r > 0) {
+ r = set_put_in_addrv(ntp, addresses, r);
+ if (r < 0)
+ return r;
+ } else if (r < 0 && r != -ENOENT)
+ return r;
+ }
+
+ if (link->network->dhcp_domains) {
+ const char *domainname;
+
+ r = sd_dhcp_lease_get_domainname(link->dhcp_lease, &domainname);
+ if (r >= 0) {
+ r = set_put_strdup(domains, domainname);
+ if (r < 0)
+ return r;
+ } else if (r != -ENOENT)
+ return r;
+ }
}
- if (carrier)
- oper_state = "carrier";
- else if (dormant)
- oper_state = "dormant";
+ operstate_str = link_operstate_to_string(operstate);
+ assert(operstate_str);
r = fopen_temporary(m->state_file, &f, &temp_path);
if (r < 0)
- goto finish;
+ return r;
fchmod(fileno(f), 0644);
fprintf(f,
"# This is private data. Do not parse.\n"
- "OPER_STATE=%s\n", oper_state);
+ "OPER_STATE=%s\n", operstate_str);
- fflush(f);
+ print_string_set(f, "DNS=", dns);
+ print_string_set(f, "NTP=", ntp);
+ print_string_set(f, "DOMAINS=", domains);
- if (ferror(f) || rename(temp_path, m->state_file) < 0) {
+ r = fflush_and_check(f);
+ if (r < 0)
+ goto fail;
+
+ if (rename(temp_path, m->state_file) < 0) {
r = -errno;
- unlink(m->state_file);
- unlink(temp_path);
+ goto fail;
}
-finish:
- if (r < 0)
- log_error("Failed to save network state to %s: %s", m->state_file, strerror(-r));
+ return 0;
+fail:
+ log_error_errno(r, "Failed to save network state to %s: %m", m->state_file);
+ unlink(m->state_file);
+ unlink(temp_path);
return r;
}
+
+int manager_address_pool_acquire(Manager *m, int family, unsigned prefixlen, union in_addr_union *found) {
+ AddressPool *p;
+ int r;
+
+ assert(m);
+ assert(prefixlen > 0);
+ assert(found);
+
+ LIST_FOREACH(address_pools, p, m->address_pools) {
+ if (p->family != family)
+ continue;
+
+ r = address_pool_acquire(p, prefixlen, found);
+ if (r != 0)
+ return r;
+ }
+
+ return 0;
+}