[systemd-commits] 6 commits - src/network

Tom Gundersen tomegun at kemper.freedesktop.org
Tue Apr 22 12:06:11 PDT 2014


 src/network/networkd-link.c |  172 ++++++++++++++++++++++++++------------------
 src/network/networkd.h      |    1 
 2 files changed, 106 insertions(+), 67 deletions(-)

New commits:
commit df9aa406e8e32a2fb3b2a4b42d5871ef75a32ed8
Author: Tom Gundersen <teg at jklm.no>
Date:   Tue Apr 22 19:51:27 2014 +0200

    networkd: link - reduce default verbosity a bit

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 51cd1d6..fb873a9 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -144,7 +144,7 @@ static int link_enter_configured(Link *link) {
 static void link_enter_unmanaged(Link *link) {
         assert(link);
 
-        log_info_link(link, "unmanaged");
+        log_debug_link(link, "unmanaged");
 
         link->state = LINK_STATE_UNMANAGED;
 
@@ -1145,9 +1145,9 @@ static int link_update_flags(Link *link, sd_rtnl_message *m) {
                           IFF_NOARP | IFF_MASTER | IFF_SLAVE);
 
         if (flags_added & IFF_UP)
-                log_info_link(link, "link is up");
+                log_debug_link(link, "link is up");
         else if (flags_removed & IFF_UP)
-                log_info_link(link, "link is down");
+                log_debug_link(link, "link is down");
 
         if (flags_added & IFF_LOWER_UP)
                 log_debug_link(link, "link is lower up");
@@ -1566,7 +1566,7 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
 
         link = *ret;
 
-        log_info_link(link, "link added");
+        log_debug_link(link, "link added");
 
         if (detect_container(NULL) <= 0) {
                 /* not in a container, udev will be around */

commit 1e9be60bbabe179f5233217384f1daec757c17c7
Author: Tom Gundersen <teg at jklm.no>
Date:   Tue Apr 22 19:40:05 2014 +0200

    networkd: link - support IFLA_OPERSTATE
    
    This properly detects the state of the link based on both the link flags and the
    operstate.
    
    Moreover, always log state-changes even if we are not yet managing the link.

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 723b919..51cd1d6 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1098,9 +1098,24 @@ static int link_acquire_conf(Link *link) {
         return 0;
 }
 
-static int link_update_flags(Link *link, unsigned flags) {
-        unsigned flags_added, flags_removed, generic_flags;
-        bool carrier_gained, carrier_lost;
+static bool link_has_carrier(unsigned flags, uint8_t operstate) {
+        /* see Documentation/networking/operstates.txt in the kernel sources */
+
+        if (operstate == IF_OPER_UP)
+                return true;
+
+        if (operstate == IF_OPER_UNKNOWN)
+                /* operstate may not be implemented, so fall back to flags */
+                if ((flags & IFF_LOWER_UP) && !(flags & IFF_DORMANT))
+                        return true;
+
+        return false;
+}
+
+static int link_update_flags(Link *link, sd_rtnl_message *m) {
+        unsigned flags, flags_added, flags_removed, generic_flags;
+        uint8_t operstate;
+        bool carrier_gained = false, carrier_lost = false;
         int r;
 
         assert(link);
@@ -1108,7 +1123,19 @@ static int link_update_flags(Link *link, unsigned flags) {
         if (link->state == LINK_STATE_FAILED)
                 return 0;
 
-        if (link->flags == flags)
+        r = sd_rtnl_message_link_get_flags(m, &flags);
+        if (r < 0) {
+                log_warning_link(link, "Could not get link flags");
+                return r;
+        }
+
+        r = sd_rtnl_message_read_u8(m, IFLA_OPERSTATE, &operstate);
+        if (r < 0)
+                /* if we got a message without operstate, take it to mean
+                   the state was unchanged */
+                operstate = link->operstate;
+
+        if ((link->flags == flags) && (link->operstate == operstate))
                 return 0;
 
         flags_added = (link->flags ^ flags) & flags;
@@ -1117,26 +1144,6 @@ static int link_update_flags(Link *link, unsigned flags) {
                           IFF_MULTICAST | IFF_BROADCAST | IFF_PROMISC |
                           IFF_NOARP | IFF_MASTER | IFF_SLAVE);
 
-        /* consider link to have carrier when LOWER_UP and !DORMANT
-
-           TODO: use proper operstates once we start supporting 802.1X
-
-           see Documentation/networking/operstates.txt in the kernel sources
-         */
-        carrier_gained = (((flags_added & IFF_LOWER_UP) && !(flags & IFF_DORMANT)) ||
-                          ((flags_removed & IFF_DORMANT) && (flags & IFF_LOWER_UP)));
-        carrier_lost = ((link->flags & IFF_LOWER_UP) && !(link->flags & IFF_DORMANT)) &&
-                       ((flags_removed & IFF_LOWER_UP) || (flags_added & IFF_DORMANT));
-
-        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");
         else if (flags_removed & IFF_UP)
@@ -1196,13 +1203,20 @@ static int link_update_flags(Link *link, unsigned flags) {
                 log_debug_link(link, "unknown link flags lost: %#.5x (ignoring)",
                                flags_removed & generic_flags);
 
+        carrier_gained = !link_has_carrier(link->flags, link->operstate) &&
+                       link_has_carrier(flags, operstate);
+        carrier_lost = link_has_carrier(link->flags, link->operstate) &&
+                         !link_has_carrier(flags, operstate);
+
+        link->flags = flags;
+        link->operstate = operstate;
+
         if (carrier_gained) {
                 log_info_link(link, "gained carrier");
 
-                if (link->network->dhcp || link->network->ipv4ll) {
+                if (link->network) {
                         r = link_acquire_conf(link);
                         if (r < 0) {
-                                log_warning_link(link, "Could not acquire configuration: %s", strerror(-r));
                                 link_enter_failed(link);
                                 return r;
                         }
@@ -1210,22 +1224,10 @@ static int link_update_flags(Link *link, unsigned flags) {
         } else if (carrier_lost) {
                 log_info_link(link, "lost carrier");
 
-                if (link->network->dhcp) {
-                        r = sd_dhcp_client_stop(link->dhcp_client);
-                        if (r < 0) {
-                                log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r));
-                                link_enter_failed(link);
-                                return r;
-                        }
-                }
-
-                if (link->network->ipv4ll) {
-                        r = sd_ipv4ll_stop(link->ipv4ll);
-                        if (r < 0) {
-                                log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r));
-                                link_enter_failed(link);
-                                return r;
-                        }
+                r = link_stop_clients(link);
+                if (r < 0) {
+                        link_enter_failed(link);
+                        return r;
                 }
         }
 
@@ -1506,12 +1508,16 @@ static int link_configure(Link *link) {
                 }
         }
 
+        if (link_has_carrier(link->flags, link->operstate))
+                r = link_acquire_conf(link);
+                if (r < 0)
+                        return r;
+
         return link_enter_enslave(link);
 }
 
 int link_initialized(Link *link, struct udev_device *device) {
         Network *network;
-        unsigned flags;
         int r;
 
         assert(link);
@@ -1541,13 +1547,6 @@ int link_initialized(Link *link, struct udev_device *device) {
         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;
 }
 
@@ -1591,7 +1590,6 @@ int link_add(Manager *m, sd_rtnl_message *message, Link **ret) {
 }
 
 int link_update(Link *link, sd_rtnl_message *m) {
-        unsigned flags;
         struct ether_addr mac;
         char *ifname;
         int r;
@@ -1659,13 +1657,7 @@ int link_update(Link *link, sd_rtnl_message *m) {
                 }
         }
 
-        r = sd_rtnl_message_link_get_flags(m, &flags);
-        if (r < 0) {
-                log_warning_link(link, "Could not get link flags");
-                return r;
-        }
-
-        return link_update_flags(link, flags);
+        return link_update_flags(link, m);
 }
 
 int link_save(Link *link) {
diff --git a/src/network/networkd.h b/src/network/networkd.h
index f481dde..d31844a 100644
--- a/src/network/networkd.h
+++ b/src/network/networkd.h
@@ -206,6 +206,7 @@ struct Link {
         struct udev_device *udev_device;
 
         unsigned flags;
+        uint8_t operstate;
 
         Network *network;
 

commit 45ad2c132827b0ab5854ec52068659f246c59cf8
Author: Tom Gundersen <teg at jklm.no>
Date:   Tue Apr 22 19:36:40 2014 +0200

    networkd: link - don't react to successfull link up
    
    Avoid having two code-paths racing with eacother to do the same thing. The change
    of flags will be detected in the normal way, so only use the link_up_handler
    to detect if the 'up' failed and in that case fail the link.

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 9f632e4..723b919 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1242,14 +1242,15 @@ static int link_up_handler(sd_rtnl *rtnl, sd_rtnl_message *m, void *userdata) {
                 return 1;
 
         r = sd_rtnl_message_get_errno(m);
-        if (r >= 0)
-                link_update_flags(link, link->flags | IFF_UP);
-        else
+        if (r < 0) {
                 log_struct_link(LOG_WARNING, link,
                                 "MESSAGE=%s: could not bring up interface: %s",
                                 link->ifname, strerror(-r),
                                 "ERRNO=%d", -r,
                                 NULL);
+                link_enter_failed(link);
+        }
+
         return 1;
 }
 
@@ -1446,6 +1447,7 @@ static int link_configure(Link *link) {
 
         if (link->network->ipv4ll) {
                 uint8_t seed[8];
+
                 r = sd_ipv4ll_new(&link->ipv4ll);
                 if (r < 0)
                         return r;

commit 124fa2c601c6fbbc3751b744c6f68bd522e0c588
Author: Tom Gundersen <teg at jklm.no>
Date:   Tue Apr 22 19:29:14 2014 +0200

    networkd: link - log when starting clients fail

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 653beae..9f632e4 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -1075,8 +1075,11 @@ static int link_acquire_conf(Link *link) {
                 log_debug_link(link, "acquiring IPv4 link-local address");
 
                 r = sd_ipv4ll_start(link->ipv4ll);
-                if (r < 0)
+                if (r < 0) {
+                        log_warning_link(link, "could not acquire IPv4 "
+                                         "link-local address");
                         return r;
+                }
         }
 
         if (link->network->dhcp) {
@@ -1085,8 +1088,11 @@ static int link_acquire_conf(Link *link) {
                 log_debug_link(link, "acquiring DHCPv4 lease");
 
                 r = sd_dhcp_client_start(link->dhcp_client);
-                if (r < 0)
+                if (r < 0) {
+                        log_warning_link(link, "could not acquire DHCPv4 "
+                                         "lease");
                         return r;
+                }
         }
 
         return 0;

commit 2139694e823935d3ac1479aa7c9a78ee3ffdc759
Author: Tom Gundersen <teg at jklm.no>
Date:   Tue Apr 22 19:26:04 2014 +0200

    networkd: link - avoid cycle when failing

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index d9b38c1..653beae 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -187,6 +187,9 @@ static int link_stop_clients(Link *link) {
 static void link_enter_failed(Link *link) {
         assert(link);
 
+        if (link->state == LINK_STATE_FAILED)
+                return;
+
         log_warning_link(link, "failed");
 
         link->state = LINK_STATE_FAILED;

commit 111bb8f93a2e936fc62fc2f34350b85c5f0000c8
Author: Tom Gundersen <teg at jklm.no>
Date:   Tue Apr 22 19:25:31 2014 +0200

    networkd: link - stop clients when failing

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 392665a..d9b38c1 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -151,6 +151,39 @@ static void link_enter_unmanaged(Link *link) {
         link_save(link);
 }
 
+static int link_stop_clients(Link *link) {
+        int r = 0, k;
+
+        assert(link);
+        assert(link->manager);
+        assert(link->manager->event);
+
+        if (!link->network)
+                return 0;
+
+        if (link->network->dhcp) {
+                assert(link->dhcp_client);
+
+                k = sd_dhcp_client_stop(link->dhcp_client);
+                if (k < 0) {
+                        log_warning_link(link, "Could not stop DHCPv4 client: %s", strerror(-r));
+                        r = k;
+                }
+        }
+
+        if (link->network->ipv4ll) {
+                assert(link->ipv4ll);
+
+                k = sd_ipv4ll_stop(link->ipv4ll);
+                if (k < 0) {
+                        log_warning_link(link, "Could not stop IPv4 link-local: %s", strerror(-r));
+                        r = k;
+                }
+        }
+
+        return r;
+}
+
 static void link_enter_failed(Link *link) {
         assert(link);
 
@@ -158,6 +191,8 @@ static void link_enter_failed(Link *link) {
 
         link->state = LINK_STATE_FAILED;
 
+        link_stop_clients(link);
+
         link_save(link);
 }
 



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