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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-API] [PATCH 15 of 33] interface-reconfigure: Various refactoring
Move functions around and rename to reduce diff with vswitch
version. (The vswitch version has previously had the function names
rationalised and functions reordered into functional groups).
- Move check_allowed() to new "Boot from Network filesystem or device."
section. Add usage comment.
- Move interface_name() to new section "Bare Network Devices" and rename
pif_netdev_name().
- Move interface_exists() to "Bare Network Devices" and rename netdev_exists().
- Move configure_static_routes() to "IP device configuration" and
rename ipdev_configure_static_routes().
- Move configure_network() to "IP device configuration" and rename
ipdev_configure_network().
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
diff -r af610bc596af -r b12c62cd92e1 scripts/interface-reconfigure
--- a/scripts/interface-reconfigure Fri Dec 18 14:16:32 2009 +0000
+++ b/scripts/interface-reconfigure Fri Dec 18 14:16:32 2009 +0000
@@ -69,7 +69,7 @@
rec['uuid'] = pifrec['uuid']
rec['ip_configuration_mode'] = pifrec['ip_configuration_mode']
rec['action'] = action
- rec['pif_netdev_name'] = interface_name(pif)
+ rec['pif_netdev_name'] = pif_netdev_name(pif)
rec['message'] = "Bring %(action)s PIF %(uuid)s" % rec
log("%(message)s: %(pif_netdev_name)s configured as
%(ip_configuration_mode)s" % rec)
@@ -226,24 +226,6 @@
self.__state = self.__STATE['COMMITTED']
-def check_allowed(pif):
- pifrec = db.get_pif_record(pif)
- try:
- f = open("/proc/ardence")
- macline = filter(lambda x: x.startswith("HWaddr:"), f.readlines())
- f.close()
- if len(macline) == 1:
- p = re.compile(".*\s%(MAC)s\s.*" % pifrec, re.IGNORECASE)
- if p.match(macline[0]):
- log("Skipping PVS device %(device)s (%(MAC)s)" % pifrec)
- return False
- except IOError:
- pass
- return True
-
-def interface_exists(i):
- return os.path.exists("/sys/class/net/" + i)
-
def interface_up(i):
operstate = os.path.join("/sys/class/net",i,"operstate")
if not os.path.exists(operstate):
@@ -258,7 +240,7 @@
return state in ["up", "unknown"]
def ifdown(interface):
- if not interface_exists(interface):
+ if not netdev_exists(interface):
log("ifdown: interface %s does not exist, ignoring" % interface)
return
run_command(["/sbin/ifdown", interface])
@@ -268,13 +250,13 @@
def delbr(bridge):
- if not interface_exists(bridge):
+ if not netdev_exists(bridge):
log("delbr: bridge %s does not exist, ignoring" % bridge)
return
run_command(["/usr/sbin/brctl", "delbr", bridge])
def vconfig_rem(vlan):
- if not interface_exists(vlan):
+ if not netdev_exists(vlan):
log("vconfig del: vlan %s does not exist, ignoring" % vlan)
return
run_command(["/sbin/vconfig", "rem", vlan])
@@ -337,41 +319,6 @@
except ValueError, x:
log("Invalid value for mtu = %s" % mtu)
-def configure_static_routes(interface, oc, f):
- """Open a route-<interface> file for static routes.
-
- Opens the static routes configuration file for interface and writes one
- line for each route specified in the network's other config
"static-routes" value.
- E.g. if
- interface ( RO): xenbr1
- other-config (MRW): static-routes:
172.16.0.0/15/192.168.0.3,172.18.0.0/16/192.168.0.4;...
-
- Then route-xenbr1 should be
- 172.16.0.0/15 via 192.168.0.3 dev xenbr1
- 172.18.0.0/16 via 192.168.0.4 dev xenbr1
- """
- if oc.has_key('static-routes'):
- # The key is present - extract comma seperates entries
- lines = oc['static-routes'].split(',')
- else:
- # The key is not present, i.e. there are no static routes
- lines = []
-
- child = ConfigurationFile("/etc/sysconfig/network-scripts/route-%s" %
interface)
- child.write("# DO NOT EDIT: This file (%s) was autogenerated by %s\n" % \
- (os.path.basename(child.path()), os.path.basename(sys.argv[0])))
-
- try:
- for l in lines:
- network, masklen, gateway = l.split('/')
- child.write("%s/%s via %s dev %s\n" % (network, masklen, gateway,
interface))
-
- f.attach_child(child)
- child.close()
-
- except ValueError, e:
- log("Error in other-config['static-routes'] format for network %s: %s"
% (interface, e))
-
def __open_ifcfg(interface):
"""Open a network interface configuration file.
@@ -390,7 +337,7 @@
def open_network_ifcfg(pif):
bridge = bridge_name(pif)
- interface = interface_name(pif)
+ interface = pif_netdev_name(pif)
if bridge:
return __open_ifcfg(bridge)
else:
@@ -400,9 +347,9 @@
def open_pif_ifcfg(pif):
pifrec = db.get_pif_record(pif)
- log("Configuring %s (%s)" % (interface_name(pif), pifrec['MAC']))
+ log("Configuring %s (%s)" % (pif_netdev_name(pif), pifrec['MAC']))
- f = __open_ifcfg(interface_name(pif))
+ f = __open_ifcfg(pif_netdev_name(pif))
if pifrec.has_key('other_config'):
configure_ethtool(pifrec['other_config'], f)
@@ -779,6 +726,47 @@
else:
return None
+#
+# Boot from Network filesystem or device.
+#
+
+def check_allowed(pif):
+ """Determine whether interface-reconfigure should be manipulating this PIF.
+
+ Used to prevent system PIFs (such as network root disk) from being
interfered with.
+ """
+
+ pifrec = db.get_pif_record(pif)
+ try:
+ f = open("/proc/ardence")
+ macline = filter(lambda x: x.startswith("HWaddr:"), f.readlines())
+ f.close()
+ if len(macline) == 1:
+ p = re.compile(".*\s%(MAC)s\s.*" % pifrec, re.IGNORECASE)
+ if p.match(macline[0]):
+ log("Skipping PVS device %(device)s (%(MAC)s)" % pifrec)
+ return False
+ except IOError:
+ pass
+ return True
+
+#
+# Bare Network Devices -- network devices without IP configuration
+#
+
+def netdev_exists(netdev):
+ return os.path.exists("/sys/class/net/" + netdev)
+
+def pif_netdev_name(pif):
+ """Get the netdev name for a PIF."""
+
+ pifrec = db.get_pif_record(pif)
+
+ if pif_is_vlan(pif):
+ return "%(device)s.%(VLAN)s" % pifrec
+ else:
+ return pifrec['device']
+
def bridge_name(pif):
"""Return the bridge name associated with pif, or None if network is
bridgeless"""
pifrec = db.get_pif_record(pif)
@@ -790,16 +778,6 @@
else:
# TODO: sanity check that nwrec['bridgeless'] == 'true'
return None
-
-def interface_name(pif):
- """Construct an interface name from the given PIF record."""
-
- pifrec = db.get_pif_record(pif)
-
- if pif_is_vlan(pif):
- return "%(device)s.%(VLAN)s" % pifrec
- else:
- return pifrec['device']
def load_bonding_driver():
log("Loading bonding driver")
@@ -849,7 +827,7 @@
if len(pifrec['bond_master_of']) == 0:
return
- __create_bond_device(interface_name(pif))
+ __create_bond_device(pif_netdev_name(pif))
def __destroy_bond_device(name):
if bond_device_exists(name):
@@ -879,141 +857,9 @@
if not os.access(sysfs_bonding_masters, os.F_OK):
return
- name = interface_name(pif)
+ name = pif_netdev_name(pif)
__destroy_bond_device(name)
-
-def configure_network(pif, f):
- """Write the configuration file for a network.
-
- Writes configuration derived from the network object into the relevant
- ifcfg file. The configuration file is passed in, but if the network is
- bridgeless it will be ifcfg-<interface>, otherwise it will be
ifcfg-<bridge>.
-
- This routine may also write ifcfg files of the networks corresponding to
other PIFs
- in order to maintain consistency.
-
- params:
- pif: Opaque_ref of pif
- f : ConfigurationFile(/path/to/ifcfg) to which we append network
configuration
- """
-
- pifrec = db.get_pif_record(pif)
- nw = pifrec['network']
- nwrec = db.get_network_record(nw)
- oc = None
- bridge = bridge_name(pif)
- interface = interface_name(pif)
- if bridge:
- device = bridge
- else:
- device = interface
-
- if nwrec.has_key('other_config'):
- configure_ethtool(nwrec['other_config'], f)
- configure_mtu(nwrec['other_config'], f)
- configure_static_routes(device, nwrec['other_config'], f)
-
-
- if pifrec.has_key('other_config'):
- oc = pifrec['other_config']
-
- if device == bridge:
- f.write("TYPE=Bridge\n")
- f.write("DELAY=0\n")
- f.write("STP=off\n")
- f.write("PIFDEV=%s\n" % interface_name(pif))
-
- if pifrec['ip_configuration_mode'] == "DHCP":
- f.write("BOOTPROTO=dhcp\n")
- f.write("PERSISTENT_DHCLIENT=yes\n")
- elif pifrec['ip_configuration_mode'] == "Static":
- f.write("BOOTPROTO=none\n")
- f.write("NETMASK=%(netmask)s\n" % pifrec)
- f.write("IPADDR=%(IP)s\n" % pifrec)
- f.write("GATEWAY=%(gateway)s\n" % pifrec)
- elif pifrec['ip_configuration_mode'] == "None":
- f.write("BOOTPROTO=none\n")
- else:
- raise Error("Unknown ip-configuration-mode %s" %
pifrec['ip_configuration_mode'])
-
- if pifrec.has_key('DNS') and pifrec['DNS'] != "":
- ServerList = pifrec['DNS'].split(",")
- for i in range(len(ServerList)): f.write("DNS%d=%s\n" % (i+1,
ServerList[i]))
- if oc and oc.has_key('domain'):
- f.write("DOMAIN='%s'\n" % oc['domain'].replace(',', ' '))
-
- # There can be only one DNSDEV and one GATEWAYDEV in
/etc/sysconfig/network.
- #
- # The peerdns pif will be the one with
- # pif::other-config:peerdns=true, or the mgmt pif if none have
- # this set.
- #
- # The gateway pif will be the one with
- # pif::other-config:defaultroute=true, or the mgmt pif if none
- # have this set.
-
- # Work out which pif on this host should be the DNSDEV and which
- # should be the GATEWAYDEV
- #
- # Note: we prune out the bond master pif (if it exists). This is
- # because when we are called to bring up an interface with a bond
- # master, it is implicit that we should bring down that master.
-
- pifs_on_host = [p for p in db.get_all_pifs() if not p in
get_bond_masters_of_pif(pif)]
-
- # loop through all the pifs on this host looking for one with
- # other-config:peerdns = true, and one with
- # other-config:default-route=true
- peerdns_pif = None
- defaultroute_pif = None
- for __pif in pifs_on_host:
- __pifrec = db.get_pif_record(__pif)
- __oc = __pifrec['other_config']
- if __oc.has_key('peerdns') and __oc['peerdns'] == 'true':
- if peerdns_pif == None:
- peerdns_pif = __pif
- else:
- log('Warning: multiple pifs with "peerdns=true" - choosing %s
and ignoring %s' % \
- (db.get_pif_record(peerdns_pif)['device'],
__pifrec['device']))
- if __oc.has_key('defaultroute') and __oc['defaultroute'] == 'true':
- if defaultroute_pif == None:
- defaultroute_pif = __pif
- else:
- log('Warning: multiple pifs with "defaultroute=true" -
choosing %s and ignoring %s' % \
- (db.get_pif_record(defaultroute_pif)['device'],
__pifrec['device']))
-
- # If no pif is explicitly specified then use the mgmt pif for
peerdns/defaultroute
- if peerdns_pif == None:
- peerdns_pif = management_pif
- if defaultroute_pif == None:
- defaultroute_pif = management_pif
-
- is_dnsdev = peerdns_pif == pif
- is_gatewaydev = defaultroute_pif == pif
-
- if is_dnsdev or is_gatewaydev:
- fnetwork = ConfigurationFile("/etc/sysconfig/network")
- for line in fnetwork.readlines():
- if is_dnsdev and line.lstrip().startswith('DNSDEV='):
- fnetwork.write('DNSDEV=%s\n' % bridge)
- is_dnsdev = False
- elif is_gatewaydev and line.lstrip().startswith('GATEWAYDEV='):
- fnetwork.write('GATEWAYDEV=%s\n' % bridge)
- is_gatewaydev = False
- else:
- fnetwork.write(line)
-
- if is_dnsdev:
- fnetwork.write('DNSDEV=%s\n' % bridge_name(pif))
- if is_gatewaydev:
- fnetwork.write('GATEWAYDEV=%s\n' % bridge_name(pif))
-
- fnetwork.close()
- f.attach_child(fnetwork)
-
- return
-
def configure_physical_interface(pif):
"""Write the configuration for a physical interface.
@@ -1225,7 +1071,7 @@
required when the bond is brought up."""
if pif_is_vlan(pif):
- interface = interface_name(pif)
+ interface = pif_netdev_name(pif)
log("bring_down_interface: %s is a VLAN" % interface)
ifdown(interface)
@@ -1249,13 +1095,13 @@
log("bring_down_interface: vlan slave has other masters")
return
- log("bring_down_interface: no more masters, bring down vlan slave %s"
% interface_name(slave))
+ log("bring_down_interface: no more masters, bring down vlan slave %s"
% pif_netdev_name(slave))
pif = slave
else:
vlan_masters = get_vlan_masters_of_pif(pif)
- log("vlan masters of %s - %s" % (db.get_pif_record(pif)['device'],
[interface_name(m) for m in vlan_masters]))
+ log("vlan masters of %s - %s" % (db.get_pif_record(pif)['device'],
[pif_netdev_name(m) for m in vlan_masters]))
if len([m for m in vlan_masters if
db.get_pif_record(m)['currently_attached']]) > 0:
- log("Leaving %s up due to currently attached VLAN masters" %
interface_name(pif))
+ log("Leaving %s up due to currently attached VLAN masters" %
pif_netdev_name(pif))
return
# pif is now either a bond or a physical device which needs to be brought
down
@@ -1263,9 +1109,9 @@
# Need to bring down bond slaves first since the bond device
# must be up to enslave/unenslave.
bond_slaves = get_bond_slaves_of_pif(pif)
- log("bond slaves of %s - %s" % (db.get_pif_record(pif)['device'],
[interface_name(s) for s in bond_slaves]))
+ log("bond slaves of %s - %s" % (db.get_pif_record(pif)['device'],
[pif_netdev_name(s) for s in bond_slaves]))
for slave in bond_slaves:
- slave_interface = interface_name(slave)
+ slave_interface = pif_netdev_name(slave)
slave_bridge = bridge_name(slave)
if db.get_pif_record(slave)['currently_attached']:
log("leave bond slave %s up (currently attached)" %
slave_interface)
@@ -1278,7 +1124,7 @@
if slave_bridge:
bring_down_bridge(slave_bridge, destroy=True)
- interface = interface_name(pif)
+ interface = pif_netdev_name(pif)
log("Bring interface %s down" % interface)
ifdown(interface)
@@ -1290,7 +1136,7 @@
def interface_is_up(pif):
try:
- interface = interface_name(pif)
+ interface = pif_netdev_name(pif)
state = open("/sys/class/net/%s/operstate" % interface).read().strip()
return state == "up"
except:
@@ -1309,12 +1155,186 @@
if not interface_is_up(slave):
bring_up_interface(slave)
- interface = interface_name(pif)
+ interface = pif_netdev_name(pif)
create_bond_device(pif)
log("Bring interface %s up" % interface)
ifup(interface)
+
+#
+# IP device configuration
+#
+
+def ipdev_configure_static_routes(interface, oc, f):
+ """Open a route-<interface> file for static routes.
+
+ Opens the static routes configuration file for interface and writes one
+ line for each route specified in the network's other config
"static-routes" value.
+ E.g. if
+ interface ( RO): xenbr1
+ other-config (MRW): static-routes:
172.16.0.0/15/192.168.0.3,172.18.0.0/16/192.168.0.4;...
+
+ Then route-xenbr1 should be
+ 172.16.0.0/15 via 192.168.0.3 dev xenbr1
+ 172.18.0.0/16 via 192.168.0.4 dev xenbr1
+ """
+ if oc.has_key('static-routes'):
+ # The key is present - extract comma seperates entries
+ lines = oc['static-routes'].split(',')
+ else:
+ # The key is not present, i.e. there are no static routes
+ lines = []
+
+ child = ConfigurationFile("/etc/sysconfig/network-scripts/route-%s" %
interface)
+ child.write("# DO NOT EDIT: This file (%s) was autogenerated by %s\n" % \
+ (os.path.basename(child.path()), os.path.basename(sys.argv[0])))
+
+ try:
+ for l in lines:
+ network, masklen, gateway = l.split('/')
+ child.write("%s/%s via %s dev %s\n" % (network, masklen, gateway,
interface))
+
+ f.attach_child(child)
+ child.close()
+
+ except ValueError, e:
+ log("Error in other-config['static-routes'] format for network %s: %s"
% (interface, e))
+
+def ipdev_configure_network(pif, f):
+ """Write the configuration file for a network.
+
+ Writes configuration derived from the network object into the relevant
+ ifcfg file. The configuration file is passed in, but if the network is
+ bridgeless it will be ifcfg-<interface>, otherwise it will be
ifcfg-<bridge>.
+
+ This routine may also write ifcfg files of the networks corresponding to
other PIFs
+ in order to maintain consistency.
+
+ params:
+ pif: Opaque_ref of pif
+ f : ConfigurationFile(/path/to/ifcfg) to which we append network
configuration
+ """
+
+ pifrec = db.get_pif_record(pif)
+ nw = pifrec['network']
+ nwrec = db.get_network_record(nw)
+ oc = None
+ bridge = bridge_name(pif)
+ interface = pif_netdev_name(pif)
+ if bridge:
+ device = bridge
+ else:
+ device = interface
+
+ if nwrec.has_key('other_config'):
+ configure_ethtool(nwrec['other_config'], f)
+ configure_mtu(nwrec['other_config'], f)
+ ipdev_configure_static_routes(device, nwrec['other_config'], f)
+
+
+ if pifrec.has_key('other_config'):
+ oc = pifrec['other_config']
+
+ if device == bridge:
+ f.write("TYPE=Bridge\n")
+ f.write("DELAY=0\n")
+ f.write("STP=off\n")
+ f.write("PIFDEV=%s\n" % pif_netdev_name(pif))
+
+ if pifrec['ip_configuration_mode'] == "DHCP":
+ f.write("BOOTPROTO=dhcp\n")
+ f.write("PERSISTENT_DHCLIENT=yes\n")
+ elif pifrec['ip_configuration_mode'] == "Static":
+ f.write("BOOTPROTO=none\n")
+ f.write("NETMASK=%(netmask)s\n" % pifrec)
+ f.write("IPADDR=%(IP)s\n" % pifrec)
+ f.write("GATEWAY=%(gateway)s\n" % pifrec)
+ elif pifrec['ip_configuration_mode'] == "None":
+ f.write("BOOTPROTO=none\n")
+ else:
+ raise Error("Unknown ip-configuration-mode %s" %
pifrec['ip_configuration_mode'])
+
+ if pifrec.has_key('DNS') and pifrec['DNS'] != "":
+ ServerList = pifrec['DNS'].split(",")
+ for i in range(len(ServerList)): f.write("DNS%d=%s\n" % (i+1,
ServerList[i]))
+ if oc and oc.has_key('domain'):
+ f.write("DOMAIN='%s'\n" % oc['domain'].replace(',', ' '))
+
+ # There can be only one DNSDEV and one GATEWAYDEV in
/etc/sysconfig/network.
+ #
+ # The peerdns pif will be the one with
+ # pif::other-config:peerdns=true, or the mgmt pif if none have
+ # this set.
+ #
+ # The gateway pif will be the one with
+ # pif::other-config:defaultroute=true, or the mgmt pif if none
+ # have this set.
+
+ # Work out which pif on this host should be the DNSDEV and which
+ # should be the GATEWAYDEV
+ #
+ # Note: we prune out the bond master pif (if it exists). This is
+ # because when we are called to bring up an interface with a bond
+ # master, it is implicit that we should bring down that master.
+
+ pifs_on_host = [p for p in db.get_all_pifs() if not p in
get_bond_masters_of_pif(pif)]
+
+ # loop through all the pifs on this host looking for one with
+ # other-config:peerdns = true, and one with
+ # other-config:default-route=true
+ peerdns_pif = None
+ defaultroute_pif = None
+ for __pif in pifs_on_host:
+ __pifrec = db.get_pif_record(__pif)
+ __oc = __pifrec['other_config']
+ if __oc.has_key('peerdns') and __oc['peerdns'] == 'true':
+ if peerdns_pif == None:
+ peerdns_pif = __pif
+ else:
+ log('Warning: multiple pifs with "peerdns=true" - choosing %s
and ignoring %s' % \
+ (db.get_pif_record(peerdns_pif)['device'],
__pifrec['device']))
+ if __oc.has_key('defaultroute') and __oc['defaultroute'] == 'true':
+ if defaultroute_pif == None:
+ defaultroute_pif = __pif
+ else:
+ log('Warning: multiple pifs with "defaultroute=true" -
choosing %s and ignoring %s' % \
+ (db.get_pif_record(defaultroute_pif)['device'],
__pifrec['device']))
+
+ # If no pif is explicitly specified then use the mgmt pif for
peerdns/defaultroute
+ if peerdns_pif == None:
+ peerdns_pif = management_pif
+ if defaultroute_pif == None:
+ defaultroute_pif = management_pif
+
+ is_dnsdev = peerdns_pif == pif
+ is_gatewaydev = defaultroute_pif == pif
+
+ if is_dnsdev or is_gatewaydev:
+ fnetwork = ConfigurationFile("/etc/sysconfig/network")
+ for line in fnetwork.readlines():
+ if is_dnsdev and line.lstrip().startswith('DNSDEV='):
+ fnetwork.write('DNSDEV=%s\n' % bridge)
+ is_dnsdev = False
+ elif is_gatewaydev and line.lstrip().startswith('GATEWAYDEV='):
+ fnetwork.write('GATEWAYDEV=%s\n' % bridge)
+ is_gatewaydev = False
+ else:
+ fnetwork.write(line)
+
+ if is_dnsdev:
+ fnetwork.write('DNSDEV=%s\n' % bridge_name(pif))
+ if is_gatewaydev:
+ fnetwork.write('GATEWAYDEV=%s\n' % bridge_name(pif))
+
+ fnetwork.close()
+ f.attach_child(fnetwork)
+
+ return
+
+#
+# Toplevel actions
+#
def action_up(pif):
@@ -1322,19 +1342,19 @@
f = configure_pif(pif)
- interface = interface_name(pif)
+ interface = pif_netdev_name(pif)
bridge = bridge_name(pif)
mode = pifrec['ip_configuration_mode']
if bridge:
log("Configuring %s using %s configuration" % (bridge, mode))
br = open_network_ifcfg(pif)
- configure_network(pif, br)
+ ipdev_configure_network(pif, br)
br.close()
f.attach_child(br)
else:
log("Configuring %s using %s configuration" % (interface, mode))
- configure_network(pif, f)
+ ipdev_configure_network(pif, f)
f.close()
@@ -1345,7 +1365,7 @@
# Bring down any VLAN masters so that we can reconfigure the slave.
vlan_masters = get_vlan_masters_of_pif(pif)
for master in vlan_masters:
- name = interface_name(master)
+ name = pif_netdev_name(master)
log("action_up: bring down %s" % (name))
ifdown(name)
@@ -1374,7 +1394,7 @@
# Bring back any currently-attached VLAN masters (brought down above)
for master in [v for v in vlan_masters if
db.get_pif_record(v)['currently_attached']]:
- name = interface_name(master)
+ name = pif_netdev_name(master)
log("action_up: bring up %s" % (name))
ifup(name)
@@ -1393,19 +1413,19 @@
f = configure_pif(pif)
- interface = interface_name(pif)
+ interface = pif_netdev_name(pif)
bridge = bridge_name(pif)
mode = pifrec['ip_configuration_mode']
if bridge:
log("Configuring %s using %s configuration" % (bridge, mode))
br = open_network_ifcfg(pif)
- configure_network(pif, br)
+ ipdev_configure_network(pif, br)
br.close()
f.attach_child(br)
else:
log("Configuring %s using %s configuration" % (interface, mode))
- configure_network(pif, f)
+ ipdev_configure_network(pif, f)
f.close()
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