[vxlanmgrd]: Add vxlanmgrd (sonic-net#807)

* [vxlanmgrd]: Add vxlanmgrd

vxlanmgrd is responsible for vxlan configuration in Linux
It creates vxlan interface for every vxlan entry in Config DB

* [vxlanmgrd]: Change the logic about create/delete Vxlan

Combine vxlan_tunnel and vnet:vni to be a vxlan

* Skipping Vxlan test until daemon start is merged

* [vxlanmgrd]: Change Macro name of CMD_DETACH_BRIDGE_FROM_VXLAN to CMD_DETACH_BRIDGE_FROM_VNET

* [vxlanmgrd]: Change the naming rule of vxlan interfaces and vxlan bridges

* [vxlanmgrd]: Don't remove this event if linux commands fail

If linux commands fail, don't remove this event. print the error log and try it again.

* [vxlanmgrd]: Fix typo , delete useless spaces and modify name

* [vxlanmgrd]: More efficient create vxlan and use struct to replace map
- Change config db polling operation to cache
- Use VxlanInfo struct to replace stl map

* [vxlanmgrd]: Polish log and code

Signed-off-by: Ze Gan <[email protected]>

.gitignore

@@ -51,6 +51,7 @@ cfgmgr/teammgrd
 cfgmgr/vlanmgrd
 cfgmgr/vrfmgrd
 cfgmgr/nbrmgrd
+cfgmgr/vxlanmgrd
 neighsyncd/neighsyncd
 portsyncd/portsyncd
 orchagent/orchagent

cfgmgr/Makefile.am

@@ -3,7 +3,7 @@ CFLAGS_SAI = -I /usr/include/sai
 LIBNL_CFLAGS = -I/usr/include/libnl3
 LIBNL_LIBS = -lnl-genl-3 -lnl-route-3 -lnl-3
 
-bin_PROGRAMS = vlanmgrd teammgrd portmgrd intfmgrd buffermgrd vrfmgrd nbrmgrd
+bin_PROGRAMS = vlanmgrd teammgrd portmgrd intfmgrd buffermgrd vrfmgrd nbrmgrd vxlanmgrd
 
 if DEBUG
 DBGFLAGS = -ggdb -DDEBUG
@@ -44,4 +44,9 @@ vrfmgrd_LDADD = -lswsscommon
 nbrmgrd_SOURCES = nbrmgrd.cpp nbrmgr.cpp $(top_srcdir)/orchagent/orch.cpp $(top_srcdir)/orchagent/request_parser.cpp shellcmd.h
 nbrmgrd_CFLAGS = $(DBGFLAGS) $(AM_CFLAGS) $(CFLAGS_COMMON) $(CFLAGS_SAI) $(LIBNL_CFLAGS)
 nbrmgrd_CPPFLAGS = $(DBGFLAGS) $(AM_CFLAGS) $(CFLAGS_COMMON) $(CFLAGS_SAI) $(LIBNL_CPPFLAGS)
-nbrmgrd_LDADD = -lswsscommon $(LIBNL_LIBS)
+nbrmgrd_LDADD = -lswsscommon $(LIBNL_LIBS)
+
+vxlanmgrd_SOURCES = vxlanmgrd.cpp vxlanmgr.cpp $(top_srcdir)/orchagent/orch.cpp $(top_srcdir)/orchagent/request_parser.cpp shellcmd.h
+vxlanmgrd_CFLAGS = $(DBGFLAGS) $(AM_CFLAGS) $(CFLAGS_COMMON) $(CFLAGS_SAI)
+vxlanmgrd_CPPFLAGS = $(DBGFLAGS) $(AM_CFLAGS) $(CFLAGS_COMMON) $(CFLAGS_SAI)
+vxlanmgrd_LDADD = -lswsscommon

cfgmgr/shellcmd.h

@@ -3,6 +3,7 @@
 
 #define IP_CMD               "/sbin/ip"
 #define BRIDGE_CMD           "/sbin/bridge"
+#define BRCTL_CMD            "/sbin/brctl"
 #define ECHO_CMD             "/bin/echo"
 #define BASH_CMD             "/bin/bash"
 #define GREP_CMD             "/bin/grep"