diff options
| author | Tom Gundersen <teg@jklm.no> | 2014-04-12 12:27:22 +0200 |
|---|---|---|
| committer | Tom Gundersen <teg@jklm.no> | 2014-04-12 12:48:12 +0200 |
| commit | 7cc832b91e8f5883b505c42f9f403e03dfc83c89 (patch) | |
| tree | 0d354c9b44a1086c9c488edac3b9b3107904c5f7 /src/network/networkd-link.c | |
| parent | ffba61663aa5f11b2066928d74c09f00e60e9e20 (diff) | |
networkd: link - require both RUNNING and LOWER_UP before using link
Usually RUNNING implies LOWER_UP, but for drivers that don't support oper state, RUNNING can
also mean that the state is unknown. In that case we should just trust LOWER_UP directly.
Diffstat (limited to 'src/network/networkd-link.c')
| -rw-r--r-- | src/network/networkd-link.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c index 45276ba2dd..7f815382a4 100644 --- a/src/network/networkd-link.c +++ b/src/network/networkd-link.c @@ -1032,6 +1032,7 @@ static int link_acquire_conf(Link *link) { 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); @@ -1047,6 +1048,18 @@ static int link_update_flags(Link *link, unsigned flags) { flags_removed = (link->flags ^ flags) & link->flags; generic_flags = ~(IFF_UP | IFF_LOWER_UP | IFF_RUNNING); + /* 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)); + + link->flags = flags; + if (flags_added & generic_flags) log_debug_link(link, "link flags gained: %#.8x", flags_added & generic_flags); @@ -1061,13 +1074,17 @@ static int link_update_flags(Link *link, unsigned flags) { log_info_link(link, "link is down"); if (flags_added & IFF_LOWER_UP) - log_info_link(link, "carrier on"); + log_info_link(link, "link is lower up"); else if (flags_removed & IFF_LOWER_UP) - log_info_link(link, "carrier off"); + log_info_link(link, "link is lower down"); + if (flags_added & IFF_RUNNING) + log_info_link(link, "link is running"); + else if (flags_removed & IFF_RUNNING) + log_info_link(link, "link is not running"); - 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); @@ -1077,8 +1094,8 @@ static int link_update_flags(Link *link, unsigned flags) { 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); @@ -1099,8 +1116,6 @@ static int link_update_flags(Link *link, unsigned flags) { } } - link->flags = flags; - return 0; } |