networkd: bond add support for lacp rate

LacpduTransmitRate
option specifies the rate in which link partner to transmit
LACPDU packets in 802.3ad mode.  Possible values
slow : Request partner to transmit LACPDUs every 30 seconds
fast : Request partner to transmit LACPDUs every 1 second
The default is slow.

chages:
1. Added enum bond_lacp_rate_table
2. gperf LacpduTransmitRate

Test:
conf file:
[NetDev]
Name=bond1
Kind=bond

[Bond]
Mode=802.3ad
LacpduTransmitRate=fast

test:
cat /proc/net/bonding/bond1
Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2+3 (2)
MII Status: up
MII Polling Interval (ms): 0
Up Delay (ms): 0
Down Delay (ms): 0

802.3ad info
LACP rate: fast
Min links: 0
Aggregator selection policy (ad_select): stable
bond bond1 has no active aggregator

[tomegun: renamed from LacpduTransmitRate to LACPTransmitRate, manpage fixes and
dropped bond_ prefix from variables]

4 files changed, 61 insertions, 15 deletions

diff --git a/man/systemd.netdev.xml b/man/systemd.netdev.xml
index ba212ec065..cea416f94f 100644
--- a/man/systemd.netdev.xml
+++ b/man/systemd.netdev.xml
@@ -408,14 +408,15 @@
                                 <varlistentry>
                                         <term><varname>Mode=</varname></term>
                                         <listitem>
-                                          <para>Specifies one of the bonding policies. The default is balance-rr (round robin).
-                                                <literal>balance-rr</literal>
-                                                <literal>active-backup</literal>
-                                                <literal>balance-xor</literal>
-                                                <literal>broadcast</literal>
-                                                <literal>802.3ad</literal>
-                                                <literal>balance-tlb</literal>
-                                                <literal>balance-alb</literal>
+                                          <para>Specifies one of the bonding policies. The default is
+                                          <literal>balance-rr</literal> (round robin). Possible values are
+                                                <literal>balance-rr</literal>,
+                                                <literal>active-backup</literal>,
+                                                <literal>balance-xor</literal>,
+                                                <literal>broadcast</literal>,
+                                                <literal>802.3ad</literal>,
+                                                <literal>balance-tlb</literal>, and
+                                                <literal>balance-alb</literal>.
                                           </para>
                                         </listitem>
                                 </varlistentry>
@@ -424,17 +425,28 @@
                                   <term><varname>TransmitHashPolicy=</varname></term>
                                   <listitem>
                                     <para>Selects the transmit hash policy to use for slave selection in
-                                    balance-xor, 802.3ad, and tlb modes.
-                                    <literal>layer2</literal>
-                                    <literal>layer3+4</literal>
-                                    <literal>layer2+3</literal>
-                                    <literal>encap2+3</literal>
-                                    <literal>802.3ad</literal>
-                                    <literal>encap3+4</literal>
+                                    balance-xor, 802.3ad, and tlb modes. Possible values are
+                                    <literal>layer2</literal>,
+                                    <literal>layer3+4</literal>,
+                                    <literal>layer2+3</literal>,
+                                    <literal>encap2+3</literal>,
+                                    <literal>802.3ad</literal>, and
+                                    <literal>encap3+4</literal>.
                                     </para>
                                   </listitem>
                                 </varlistentry>
 
+                                <varlistentry>
+                                  <term><varname>LACPTransmitRate=</varname></term>
+                                  <listitem>
+                                    <para>Specifies the rate with which link partner
+                                    transmits Link Aggregation Control Protocol Data Unit packets
+                                    in 802.3ad mode. Possible values are
+                                    <literal>slow</literal>, which requests partner to transmit LACPDUs every 30 seconds, and
+                                    <literal>fast</literal>, which requests partner to transmit LACPDUs every second.
+                                    The default value is <literal>slow</literal>.</para>
+                                  </listitem>
+                                </varlistentry>
                         </variablelist>
         </refsect1>
 
diff --git a/src/network/networkd-netdev-bond.c b/src/network/networkd-netdev-bond.c
index c4d1fcd17e..e3f3333560 100644
--- a/src/network/networkd-netdev-bond.c
+++ b/src/network/networkd-netdev-bond.c
@@ -57,6 +57,14 @@ DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_xmit_hash_policy,
                          BondXmitHashPolicy,
                          "Failed to parse bond transmit hash policy")
 
+static const char* const bond_lacp_rate_table[_NETDEV_BOND_LACP_RATE_MAX] = {
+        [NETDEV_BOND_LACP_RATE_SLOW] = "slow",
+        [NETDEV_BOND_LACP_RATE_FAST] = "fast",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(bond_lacp_rate, BondLacpRate);
+DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_lacp_rate, bond_lacp_rate, BondLacpRate, "Failed to parse bond lacp rate")
+
 static uint8_t bond_mode_to_kernel(BondMode mode) {
         switch (mode) {
         case NETDEV_BOND_MODE_BALANCE_RR:
@@ -126,6 +134,17 @@ static int netdev_bond_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_m
                 }
         }
 
+        if (b->lacp_rate != _NETDEV_BOND_LACP_RATE_INVALID &&
+            b->mode == NETDEV_BOND_MODE_802_3AD) {
+                r = sd_rtnl_message_append_u8(m, IFLA_BOND_AD_LACP_RATE, b->lacp_rate );
+                if (r < 0) {
+                        log_error_netdev(netdev,
+                                         "Could not append IFLA_BOND_AD_LACP_RATE attribute: %s",
+                                         strerror(-r));
+                        return r;
+                }
+        }
+
         return 0;
 }
 
@@ -137,6 +156,7 @@ static void bond_init(NetDev *netdev) {
 
         b->mode = _NETDEV_BOND_MODE_INVALID;
         b->xmit_hash_policy = _NETDEV_BOND_XMIT_HASH_POLICY_INVALID;
+        b->lacp_rate = _NETDEV_BOND_LACP_RATE_INVALID;
 }
 
 const NetDevVTable bond_vtable = {
diff --git a/src/network/networkd-netdev-bond.h b/src/network/networkd-netdev-bond.h
index 0e9955ee3d..fea076817a 100644
--- a/src/network/networkd-netdev-bond.h
+++ b/src/network/networkd-netdev-bond.h
@@ -47,11 +47,20 @@ typedef enum BondXmitHashPolicy {
         _NETDEV_BOND_XMIT_HASH_POLICY_INVALID = -1
 } BondXmitHashPolicy;
 
+
+typedef enum BondLacpRate {
+        NETDEV_BOND_LACP_RATE_SLOW,
+        NETDEV_BOND_LACP_RATE_FAST,
+        _NETDEV_BOND_LACP_RATE_MAX,
+        _NETDEV_BOND_LACP_RATE_INVALID = -1,
+} BondLacpRate;
+
 struct Bond {
         NetDev meta;
 
         BondMode mode;
         BondXmitHashPolicy xmit_hash_policy;
+        BondLacpRate lacp_rate;
 };
 
 extern const NetDevVTable bond_vtable;
@@ -62,5 +71,9 @@ BondMode bond_mode_from_string(const char *d) _pure_;
 const char *bond_xmit_hash_policy_to_string(BondXmitHashPolicy d) _const_;
 BondXmitHashPolicy bond_xmit_hash_policy_from_string(const char *d) _pure_;
 
+const char *bond_lacp_rate_to_string(BondLacpRate d) _const_;
+BondLacpRate bond_lacp_rate_from_string(const char *d) _pure_;
+
 int config_parse_bond_mode(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_bond_xmit_hash_policy(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_bond_lacp_rate(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
diff --git a/src/network/networkd-netdev-gperf.gperf b/src/network/networkd-netdev-gperf.gperf
index bafdccfc1e..40fae75c42 100644
--- a/src/network/networkd-netdev-gperf.gperf
+++ b/src/network/networkd-netdev-gperf.gperf
@@ -53,3 +53,4 @@ Tap.User,                config_parse_string,                0,
 Tap.Group,               config_parse_string,                0,                             offsetof(TunTap, group_name)
 Bond.Mode,               config_parse_bond_mode,             0,                             offsetof(Bond, mode)
 Bond.TransmitHashPolicy, config_parse_bond_xmit_hash_policy, 0,                             offsetof(Bond, xmit_hash_policy)
+Bond.LACPTransmitRate,   config_parse_bond_lacp_rate,        0,                             offsetof(Bond, lacp_rate)