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nexedi
nemu3
Commits
06a7d24d
Commit
06a7d24d
authored
Aug 05, 2010
by
Martín Ferrari
Browse files
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Plain Diff
Organize things a little
parent
c713490e
Changes
8
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Side-by-side
Showing
8 changed files
with
80 additions
and
68 deletions
+80
-68
src/netns/environ.py
src/netns/environ.py
+33
-0
src/netns/interface.py
src/netns/interface.py
+2
-1
src/netns/iproute.py
src/netns/iproute.py
+27
-49
src/netns/node.py
src/netns/node.py
+4
-3
t/test_interfaces.py
t/test_interfaces.py
+6
-6
t/test_link.py
t/test_link.py
+2
-2
t/test_node.py
t/test_node.py
+3
-5
t/test_util.py
t/test_util.py
+3
-2
No files found.
src/netns/environ.py
0 → 100644
View file @
06a7d24d
# vim:ts=4:sw=4:et:ai:sts=4
import
os
__all__
=
[
"ip_path"
,
"tc_path"
,
"brctl_path"
,
"hz"
]
def
_find_bin
(
name
):
for
pref
in
(
"/"
,
"/usr/"
,
"/usr/local/"
):
for
d
in
(
"bin/"
,
"sbin/"
):
try
:
os
.
stat
(
pref
+
d
+
name
)
return
pref
+
d
+
name
except
OSError
,
e
:
if
e
.
errno
!=
os
.
errno
.
ENOENT
:
raise
raise
RuntimeError
(
"Cannot find `%s' command, impossible to continue."
%
name
)
ip_path
=
_find_bin
(
"ip"
)
tc_path
=
_find_bin
(
"tc"
)
brctl_path
=
_find_bin
(
"brctl"
)
sysctl_path
=
_find_bin
(
"sysctl"
)
# Seems this is completely bogus. At least, we can assume that the internal HZ
# is bigger than this.
hz
=
os
.
sysconf
(
"SC_CLK_TCK"
)
try
:
os
.
stat
(
"/sys/class/net"
)
except
:
raise
RuntimeError
(
"Sysfs does not seem to be mounted, impossible to "
+
"continue."
)
src/netns/interface.py
View file @
06a7d24d
...
...
@@ -50,7 +50,8 @@ class NSInterface(Interface):
# Disable auto-configuration
# you wish: need to take into account the nonetns mode; plus not
# touching some pre-existing ifaces
#node.system(['/sbin/sysctl', '-w', 'net.ipv6.conf.%s.autoconf=0' % self.name])
#node.system([sysctl_path, '-w', 'net.ipv6.conf.%s.autoconf=0' %
#self.name])
node
.
_add_interface
(
self
)
# some black magic to automatically get/set interface attributes
...
...
src/netns/iproute.py
View file @
06a7d24d
# vim:ts=4:sw=4:et:ai:sts=4
import
copy
,
os
,
re
,
socket
,
subprocess
,
sys
def
_find_bin
(
name
):
for
pref
in
(
"/"
,
"/usr/"
,
"/usr/local/"
):
for
d
in
(
"bin/"
,
"sbin/"
):
try
:
os
.
stat
(
pref
+
d
+
name
)
return
pref
+
d
+
name
except
OSError
,
e
:
if
e
.
errno
!=
os
.
errno
.
ENOENT
:
raise
raise
RuntimeError
(
"Cannot find `%s' command, impossible to continue."
%
name
)
_ip
=
_find_bin
(
"ip"
)
_tc
=
_find_bin
(
"tc"
)
_brctl
=
_find_bin
(
"brctl"
)
# Seems this is completely bogus. At least, we can assume that the internal HZ
# is bigger than this.
_hz
=
os
.
sysconf
(
"SC_CLK_TCK"
)
try
:
os
.
stat
(
"/sys/class/net"
)
except
:
raise
RuntimeError
(
"Sysfs does not seem to be mounted, impossible to "
+
"continue."
)
from
netns.environ
import
*
# helpers
def
_any_to_bool
(
any
):
...
...
@@ -311,7 +287,7 @@ def get_if_data():
In each dictionary, values are interface objects.
"""
ipcmd
=
subprocess
.
Popen
([
_ip
,
"-o"
,
"link"
,
"list"
],
ipcmd
=
subprocess
.
Popen
([
ip_path
,
"-o"
,
"link"
,
"list"
],
stdout
=
subprocess
.
PIPE
)
ipdata
=
ipcmd
.
communicate
()[
0
]
assert
ipcmd
.
wait
()
==
0
...
...
@@ -363,7 +339,7 @@ def create_if_pair(if1, if2):
if
iface
[
i
].
mtu
:
cmd
[
i
]
+=
[
"mtu"
,
str
(
iface
[
i
].
mtu
)]
cmd
=
[
_ip
,
"link"
,
"add"
]
+
cmd
[
0
]
+
[
"type"
,
"veth"
,
"peer"
]
+
cmd
[
1
]
cmd
=
[
ip_path
,
"link"
,
"add"
]
+
cmd
[
0
]
+
[
"type"
,
"veth"
,
"peer"
]
+
cmd
[
1
]
_execute
(
cmd
)
try
:
set_if
(
if1
)
...
...
@@ -381,7 +357,7 @@ def create_if_pair(if1, if2):
def
del_if
(
iface
):
ifname
=
_get_if_name
(
iface
)
_execute
([
_ip
,
"link"
,
"del"
,
ifname
])
_execute
([
ip_path
,
"link"
,
"del"
,
ifname
])
def
set_if
(
iface
,
recover
=
True
):
def
do_cmds
(
cmds
,
orig_iface
):
...
...
@@ -398,7 +374,7 @@ def set_if(iface, recover = True):
# Name goes first
if
diff
.
name
:
_ils
=
[
_ip
,
"link"
,
"set"
,
"dev"
]
_ils
=
[
ip_path
,
"link"
,
"set"
,
"dev"
]
cmds
=
[
_ils
+
[
orig_iface
.
name
,
"name"
,
diff
.
name
]]
if
orig_iface
.
up
:
# iface needs to be down
...
...
@@ -407,7 +383,7 @@ def set_if(iface, recover = True):
do_cmds
(
cmds
,
orig_iface
)
# I need to use the new name after a name change, duh!
_ils
=
[
_ip
,
"link"
,
"set"
,
"dev"
,
diff
.
name
or
orig_iface
.
name
]
_ils
=
[
ip_path
,
"link"
,
"set"
,
"dev"
,
diff
.
name
or
orig_iface
.
name
]
cmds
=
[]
if
diff
.
lladdr
:
if
orig_iface
.
up
:
...
...
@@ -432,12 +408,12 @@ def set_if(iface, recover = True):
def
change_netns
(
iface
,
netns
):
ifname
=
_get_if_name
(
iface
)
_execute
([
_ip
,
"link"
,
"set"
,
"dev"
,
ifname
,
"netns"
,
str
(
netns
)])
_execute
([
ip_path
,
"link"
,
"set"
,
"dev"
,
ifname
,
"netns"
,
str
(
netns
)])
# Address handling
def
get_addr_data
():
ipcmd
=
subprocess
.
Popen
([
_ip
,
"-o"
,
"addr"
,
"list"
],
ipcmd
=
subprocess
.
Popen
([
ip_path
,
"-o"
,
"addr"
,
"list"
],
stdout
=
subprocess
.
PIPE
)
ipdata
=
ipcmd
.
communicate
()[
0
]
assert
ipcmd
.
wait
()
==
0
...
...
@@ -479,7 +455,7 @@ def add_addr(iface, address):
addresses = get_addr_data()[1][ifname]
assert address not in addresses
cmd = [
_ip
, "addr", "add", "dev", ifname, "local",
cmd = [
ip_path
, "addr", "add", "dev", ifname, "local",
"%s/%d" % (address.address, int(address.prefix_len))]
if hasattr(address, "broadcast"):
cmd += ["broadcast", address.broadcast if address.broadcast else "+"]
...
...
@@ -490,7 +466,7 @@ def del_addr(iface, address):
addresses = get_addr_data()[1][ifname]
assert address in addresses
cmd = [
_ip
, "addr", "del", "dev", ifname, "local",
cmd = [
ip_path
, "addr", "del", "dev", ifname, "local",
"%s/%d" % (address.address, int(address.prefix_len))]
_execute(cmd)
...
...
@@ -564,7 +540,7 @@ def create_bridge(br):
if isinstance(br, str):
br = interface(name = br)
assert br.name
_execute([
_brctl
, "addbr", br.name])
_execute([
brctl_path
, "addbr", br.name])
try:
set_if(br)
except:
...
...
@@ -578,7 +554,7 @@ def create_bridge(br):
def del_bridge(br):
brname = _get_if_name(br)
_execute([
_brctl
, "delbr", brname])
_execute([
brctl_path
, "delbr", brname])
def set_bridge(br, recover = True):
def saveval(fname, val):
...
...
@@ -617,20 +593,20 @@ def set_bridge(br, recover = True):
def
add_bridge_port
(
br
,
iface
):
ifname
=
_get_if_name
(
iface
)
brname
=
_get_if_name
(
br
)
_execute
([
_brctl
,
"addif"
,
brname
,
ifname
])
_execute
([
brctl_path
,
"addif"
,
brname
,
ifname
])
def
del_bridge_port
(
br
,
iface
):
ifname
=
_get_if_name
(
iface
)
brname
=
_get_if_name
(
br
)
_execute
([
_brctl
,
"delif"
,
brname
,
ifname
])
_execute
([
brctl_path
,
"delif"
,
brname
,
ifname
])
def
get_all_route_data
():
#ipcmd = subprocess.Popen([
_ip
, "-o", "route", "list", "table", "all"],
ipcmd
=
subprocess
.
Popen
([
_ip
,
"-o"
,
"route"
,
"list"
],
#ipcmd = subprocess.Popen([
ip_path
, "-o", "route", "list", "table", "all"],
ipcmd
=
subprocess
.
Popen
([
ip_path
,
"-o"
,
"route"
,
"list"
],
stdout
=
subprocess
.
PIPE
)
ipdata
=
ipcmd
.
communicate
()[
0
]
assert
ipcmd
.
wait
()
==
0
ipcmd
=
subprocess
.
Popen
([
_ip
,
"-o"
,
"-f"
,
"inet6"
,
"route"
,
"list"
],
ipcmd
=
subprocess
.
Popen
([
ip_path
,
"-o"
,
"-f"
,
"inet6"
,
"route"
,
"list"
],
stdout
=
subprocess
.
PIPE
)
ipdata
+=
ipcmd
.
communicate
()[
0
]
assert
ipcmd
.
wait
()
==
0
...
...
@@ -678,7 +654,7 @@ def del_route(route):
_add_del_route("del", route)
def _add_del_route(action, route):
cmd = [
_ip
, "route", action]
cmd = [
ip_path
, "route", action]
if route.tipe != "unicast":
cmd += [route.tipe]
if route.prefix:
...
...
@@ -694,7 +670,8 @@ def _add_del_route(action, route):
# TC stuff
def get_tc_tree():
tccmd = subprocess.Popen([_tc, "qdisc", "show"], stdout = subprocess.PIPE)
tccmd = subprocess.Popen([tc_path, "qdisc", "show"],
stdout = subprocess.PIPE)
tcdata = tccmd.communicate()[0]
assert tccmd.wait() == 0
...
...
@@ -852,7 +829,7 @@ def clear_tc(iface):
if tcdata[iface.index] == None:
return
# Any other case, we clean
_execute([
_tc
, "qdisc", "del", "dev", iface.name, "root"])
_execute([
tc_path
, "qdisc", "del", "dev", iface.name, "root"])
def set_tc(iface, bandwidth = None, delay = None, delay_jitter = None,
delay_correlation = None, delay_distribution = None,
...
...
@@ -868,7 +845,7 @@ def set_tc(iface, bandwidth = None, delay = None, delay_jitter = None,
commands = []
if tcdata[iface.index] == '
foreign
':
# Avoid the overhead of calling tc+ip again
commands.append([
_tc
, "qdisc", "del", "dev", iface.name, "root"])
commands.append([
tc_path
, "qdisc", "del", "dev", iface.name, "root"])
tcdata[iface.index] = {'
qdiscs
': []}
has_netem = '
netem
' in tcdata[iface.index]['
qdiscs
']
...
...
@@ -884,18 +861,19 @@ def set_tc(iface, bandwidth = None, delay = None, delay_jitter = None,
else:
# Too much work to do better :)
if has_netem or has_tbf:
commands.append([_tc, "qdisc", "del", "dev", iface.name, "root"])
commands.append([tc_path, "qdisc", "del", "dev", iface.name,
"root"])
cmd = "add"
if bandwidth:
rate = "%dbit" % int(bandwidth)
mtu = ifdata[iface.index].mtu
burst = max(mtu, int(bandwidth) /
_
hz)
burst = max(mtu, int(bandwidth) / hz)
limit = burst * 2 # FIXME?
handle = "1:"
if cmd == "change":
handle = "%d:" % int(tcdata[iface.index]["qdiscs"]["tbf"])
command = [
_tc
, "qdisc", cmd, "dev", iface.name, "root", "handle",
command = [
tc_path
, "qdisc", cmd, "dev", iface.name, "root", "handle",
handle, "tbf", "rate", rate, "limit", str(limit), "burst",
str(burst)]
commands.append(command)
...
...
@@ -904,7 +882,7 @@ def set_tc(iface, bandwidth = None, delay = None, delay_jitter = None,
handle = "2:"
if cmd == "change":
handle = "%d:" % int(tcdata[iface.index]["qdiscs"]["netem"])
command = [
_tc
, "qdisc", cmd, "dev", iface.name, "handle", handle]
command = [
tc_path
, "qdisc", cmd, "dev", iface.name, "handle", handle]
if bandwidth:
parent = "1:"
if cmd == "change":
...
...
src/netns/node.py
View file @
06a7d24d
...
...
@@ -2,7 +2,7 @@
# vim:ts=4:sw=4:et:ai:sts=4
import
os
,
socket
,
sys
,
traceback
,
unshare
,
weakref
import
netns.protocol
,
netns
.
subprocess_
import
netns.
environ
,
netns
.
protocol
,
netns
.
subprocess_
__all__
=
[
'Node'
,
'get_nodes'
]
...
...
@@ -161,8 +161,9 @@ def _start_child(debug, nonetns):
# create new name space
unshare
.
unshare
(
unshare
.
CLONE_NEWNET
)
# Enable packet forwarding
netns
.
iproute
.
_execute
([
'sysctl'
,
'-w'
,
'net.ipv4.ip_forward=1'
])
netns
.
iproute
.
_execute
([
'sysctl'
,
'-w'
,
netns
.
iproute
.
_execute
([
netns
.
environ
.
sysctl_path
,
'-w'
,
'net.ipv4.ip_forward=1'
])
netns
.
iproute
.
_execute
([
netns
.
environ
.
sysctl_path
,
'-w'
,
'net.ipv6.conf.default.forwarding=1'
])
srv
.
run
()
except
BaseException
,
e
:
...
...
t/test_interfaces.py
View file @
06a7d24d
...
...
@@ -2,9 +2,9 @@
# vim:ts=4:sw=4:et:ai:sts=4
from
test_util
import
get_devs
,
get_devs_netns
from
netns.environ
import
*
import
netns
,
test_util
import
os
import
unittest
import
os
,
unittest
class
TestUtils
(
unittest
.
TestCase
):
def
test_utils
(
self
):
...
...
@@ -80,7 +80,7 @@ class TestInterfaces(unittest.TestCase):
self
.
assertTrue
(
devs
[
if0
.
name
][
'up'
])
# Verify that data is actually read from the kernel
r
=
node0
.
system
([
"ip"
,
"link"
,
"set"
,
if0
.
name
,
"mtu"
,
"1500"
])
r
=
node0
.
system
([
ip_path
,
"link"
,
"set"
,
if0
.
name
,
"mtu"
,
"1500"
])
self
.
assertEquals
(
r
,
0
)
devs
=
get_devs_netns
(
node0
)
self
.
assertEquals
(
devs
[
if0
.
name
][
'mtu'
],
1500
)
...
...
@@ -126,8 +126,8 @@ class TestWithDummy(unittest.TestCase):
def
test_interface_migration
(
self
):
node
=
netns
.
Node
()
self
.
dummyname
=
"dummy%d"
%
os
.
getpid
()
self
.
assertEquals
(
os
.
system
(
"ip link add name %s type dummy"
%
self
.
dummyname
),
0
)
self
.
assertEquals
(
os
.
system
(
"%s link add name %s type dummy"
%
(
ip_path
,
self
.
dummyname
)
),
0
)
devs
=
get_devs
()
self
.
assertTrue
(
self
.
dummyname
in
devs
)
dummyidx
=
devs
[
self
.
dummyname
][
'idx'
]
...
...
@@ -152,7 +152,7 @@ class TestWithDummy(unittest.TestCase):
def
tearDown
(
self
):
# oops here
if
hasattr
(
self
,
'dummyname'
):
os
.
system
(
"
ip link del %s"
%
self
.
dummyname
)
os
.
system
(
"
%s link del %s"
%
(
ip_path
,
self
.
dummyname
)
)
# FIXME: Links
...
...
t/test_link.py
View file @
06a7d24d
...
...
@@ -2,7 +2,7 @@
# vim:ts=4:sw=4:et:ai:sts=4
import
os
,
unittest
import
netns
,
test_util
import
netns
,
test_util
,
netns
.
environ
class
TestLink
(
unittest
.
TestCase
):
@
test_util
.
skipUnless
(
os
.
getuid
()
==
0
,
"Test requires root privileges"
)
...
...
@@ -46,7 +46,7 @@ class TestLink(unittest.TestCase):
# Test strange rules handling
os
.
system
((
"%s qd add dev %s root prio bands 3 "
+
"priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1"
)
%
(
netns
.
iproute
.
_tc
,
i1
.
control
.
name
))
(
netns
.
environ
.
tc_path
,
i1
.
control
.
name
))
tcdata
=
netns
.
iproute
.
get_tc_data
()[
0
]
self
.
assertEquals
(
tcdata
[
i1
.
control
.
index
],
"foreign"
)
l
.
set_parameters
(
bandwidth
=
13107200
)
# 100 mbits
...
...
t/test_node.py
View file @
06a7d24d
#!/usr/bin/env python
# vim:ts=4:sw=4:et:ai:sts=4
import
netns
,
test_util
import
netns
,
netns
.
environ
,
test_util
import
os
,
signal
,
subprocess
,
sys
,
time
import
unittest
class
TestNode
(
unittest
.
TestCase
):
# def setUp(self):
# pass
@
test_util
.
skipUnless
(
os
.
getuid
()
==
0
,
"Test requires root privileges"
)
def
test_node
(
self
):
node
=
netns
.
Node
()
...
...
@@ -41,8 +39,8 @@ class TestNode(unittest.TestCase):
link
.
connect
(
ifa
)
link
.
connect
(
ifb
)
def
get_devs
():
ipcmd
=
subprocess
.
Popen
([
"ip"
,
"-o"
,
"link"
,
"list"
]
,
stdout
=
subprocess
.
PIPE
)
ipcmd
=
subprocess
.
Popen
([
netns
.
environ
.
ip_path
,
"-o"
,
"link"
,
"list"
],
stdout
=
subprocess
.
PIPE
)
(
outdata
,
errdata
)
=
ipcmd
.
communicate
()
ipcmd
.
wait
()
return
outdata
.
split
(
"
\
n
"
)
...
...
t/test_util.py
View file @
06a7d24d
...
...
@@ -3,6 +3,7 @@
import
os
,
re
,
subprocess
,
sys
import
netns.subprocess_
from
netns.environ
import
*
def
process_ipcmd
(
str
):
cur
=
None
...
...
@@ -53,13 +54,13 @@ def process_ipcmd(str):
return out
def get_devs():
ipcmd = subprocess.Popen([
"ip"
, "addr", "list"],
ipcmd = subprocess.Popen([
ip_path
, "addr", "list"],
stdout = subprocess.PIPE)
(outdata, errdata) = ipcmd.communicate()
return process_ipcmd(outdata)
def get_devs_netns(node):
out = netns.subprocess_.backticks_raise(node, [
"ip"
, "addr", "list"])
out = netns.subprocess_.backticks_raise(node, [
ip_path
, "addr", "list"])
return process_ipcmd(out)
def make_linux_ver(string):
...
...
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