Cleanup the sriov_numvfs config scripts

Clean
    1) /etc/udev/rules.d/70-tripleo-reset-sriov.rules
    2) /sbin/ifup-local
    3) /etc/sysconfig/allocate_vfs
Create /etc/udev/rules.d/70-os-net-config-sriov.rules for legacy PFs

Change-Id: I17c8ef03501de75f0e3f7fb6c06be3478b1b5863
(cherry picked from commit fb296079eb)

os_net_config/sriov_config.py

@@ -36,6 +36,8 @@ from oslo_concurrency import processutils
 logger = logging.getLogger(__name__)
 _SYS_CLASS_NET = '/sys/class/net'
 _UDEV_RULE_FILE = '/etc/udev/rules.d/80-persistent-os-net-config.rules'
+_UDEV_LEGACY_RULE_FILE = '/etc/udev/rules.d/70-os-net-config-sriov.rules'
+_IFUP_LOCAL_FILE = '/sbin/ifup-local'
 MAX_RETRIES = 10
 PF_FUNC_RE = re.compile(r"\.(\d+)$", 0)
 # In order to keep VF representor name consistent specially after the upgrade
@@ -122,6 +124,27 @@ def restart_ovs_and_pfs_netdevs():
             if_up_interface(item['name'])
 
 
+def cleanup_puppet_config():
+    file_contents = ""
+    if os.path.exists('/etc/udev/rules.d/70-tripleo-reset-sriov.rules'):
+        os.remove('/etc/udev/rules.d/70-tripleo-reset-sriov.rules')
+    if os.path.exists('/etc/sysconfig/allocate_vfs'):
+        os.remove('/etc/sysconfig/allocate_vfs')
+    if os.path.exists(_IFUP_LOCAL_FILE):
+        # Remove the invocation of allocate_vfs script generated by puppet
+        # After the removal of allocate_vfs, if the ifup-local file has just
+        # "#!/bin/bash" left, then remove the file as well.
+        with open(_IFUP_LOCAL_FILE) as oldfile:
+            for line in oldfile:
+                if "/etc/sysconfig/allocate_vfs" not in line:
+                    file_contents = file_contents + line
+        if file_contents.strip() == "#!/bin/bash":
+            os.remove(_IFUP_LOCAL_FILE)
+        else:
+            with open(_IFUP_LOCAL_FILE, 'w') as newfile:
+                newfile.write(file_contents)
+
+
 def configure_sriov_pf(execution_from_cli=False, restart_openvswitch=False):
     # Create a context for pyudev and observe udev events for network
     context = pyudev.Context()
@@ -134,9 +157,18 @@ def configure_sriov_pf(execution_from_cli=False, restart_openvswitch=False):
     MLNX_UNBIND_FILE_PATH = "/sys/bus/pci/drivers/mlx5_core/unbind"
     MLNX_VENDOR_ID = "0x15b3"
     trigger_udev_rule = False
+
+    # Cleanup the previous config by puppet-tripleo
+    cleanup_puppet_config()
+
     for item in sriov_map:
         if item['device_type'] == 'pf':
             _pf_interface_up(item)
+            if item.get('link_mode') == "legacy":
+                # Add a udev rule to configure the VF's when PF's are
+                # released by a guest
+                add_udev_rule_for_legacy_sriov_pf(item['name'],
+                                                  item['numvfs'])
             try:
                 sriov_numvfs_path = os.path.join(_SYS_CLASS_NET, item['name'],
                                                  "device/sriov_numvfs")
@@ -197,6 +229,23 @@ def configure_sriov_pf(execution_from_cli=False, restart_openvswitch=False):
         restart_ovs_and_pfs_netdevs()
 
 
+def _write_numvfs(device_name, numvfs):
+
+    sriov_numvfs_path = os.path.join(_SYS_CLASS_NET, device_name,
+                                     "device/sriov_numvfs")
+    curr_numvfs = get_numvfs(device_name)
+    if curr_numvfs != 0:
+        logger.info("Numvfs already configured for %s" % device_name)
+        return
+    try:
+        with open(sriov_numvfs_path, 'w') as f:
+            f.write("%d" % numvfs)
+    except IOError as exc:
+        msg = ("Unable to configure pf: %s with numvfs: %d\n%s"
+               % (device_name, numvfs, exc))
+        raise SRIOVNumvfsException(msg)
+
+
 def _wait_for_vf_creation(pf_name, numvfs):
     vf_count = 0
     vf_list = []
@@ -254,6 +303,14 @@ def add_udev_rule_for_sriov_pf(pf_name):
     return add_udev_rule(udev_data_line, _UDEV_RULE_FILE)
 
 
+def add_udev_rule_for_legacy_sriov_pf(pf_name, numvfs):
+    logger.info("adding udev rules for %s" % (pf_name))
+    udev_line = 'KERNEL=="%s", '\
+                'RUN+="/bin/os-net-config-sriov -n %%k:%d"' \
+                % (pf_name, numvfs)
+    return add_udev_rule(udev_line, _UDEV_LEGACY_RULE_FILE)
+
+
 def add_udev_rule_for_vf_representors(pf_name):
     phys_switch_id_path = os.path.join(_SYS_CLASS_NET, pf_name,
                                        "phys_switch_id")
@@ -481,6 +538,13 @@ def parse_opts(argv):
         help="Print verbose output.",
         required=False)
 
+    parser.add_argument(
+        '-n', '--numvfs',
+        dest="numvfs",
+        action='store',
+        help="Provide the numvfs for device in the format <device>:<numvfs>",
+        required=False)
+
     opts = parser.parse_args(argv[1:])
 
     return opts
@@ -503,10 +567,18 @@ def configure_logger(verbose=False, debug=False):
 def main(argv=sys.argv):
     opts = parse_opts(argv)
     configure_logger(opts.verbose, opts.debug)
-    # Configure the PF's
-    configure_sriov_pf()
-    # Configure the VFs
-    configure_sriov_vf()
+
+    if opts.numvfs:
+        if re.match("^\w+:\d+$", opts.numvfs):
+            device_name, numvfs = opts.numvfs.split(':')
+            _write_numvfs(device_name, int(numvfs))
+        else:
+            logging.error("Invalid arguments for --numvfs %s" % opts.numvfs)
+    else:
+        # Configure the PF's
+        configure_sriov_pf()
+        # Configure the VFs
+        configure_sriov_vf()
 
 
 if __name__ == '__main__':