Justin Pettit [Tue, 25 Aug 2009 21:11:44 +0000 (14:11 -0700)]
Cleanup isdigit() warnings.
NetBSD's gcc complains if isdigit()'s argument is an unadorned char. This
provides an appropriate cast.
Justin Pettit [Tue, 25 Aug 2009 20:23:11 +0000 (13:23 -0700)]
Merge commit 'origin/citrix'
Justin Pettit [Tue, 25 Aug 2009 20:17:26 +0000 (13:17 -0700)]
datapath: Return EFBIG instead of EXFULL when no room in flow table
The EXFULL errno is only defined in Linux. While this datapath is
Linux-specific, the userspace that interacts with it is not.
Ben Pfaff [Fri, 21 Aug 2009 20:46:47 +0000 (13:46 -0700)]
netflow: Remove stray debug printf().
Ben Pfaff [Thu, 20 Aug 2009 22:39:01 +0000 (15:39 -0700)]
xenserver: Compute correct physical PIFs for VLANs on bonds.
Otherwise the bond device is considered the physical PIF of a VLAN-on-bond
PIF, and various bad stuff happens.
Ben Pfaff [Wed, 19 Aug 2009 23:08:18 +0000 (16:08 -0700)]
Merge citrix into master.
Ben Pfaff [Wed, 19 Aug 2009 22:59:18 +0000 (15:59 -0700)]
xenserver: Renice netback process to priority 0 by default.
Under heavy VM network load, we have observed that ovs-vswitchd can be
starved for CPU time, which prevents flows from being set up. This can
in turn cause connections to XAPI in Dom0 to time out (among other issues).
It is probably not necessary to renice netback all the way to priority 0
as done in this commit. That is simply the value that we have tested. QA
has not reported any ill side-effects of this choice of value (yet). One
reasonable alternative, should any problems be noticed, would be to leave
netback at its default -5 priority and simply boost ovs-vswitchd's priority
to say -6 or -7.
Bug #1656.
Ben Pfaff [Wed, 19 Aug 2009 21:49:18 +0000 (14:49 -0700)]
xenserver: Use = instead of == as operator for "test" in shell scripts.
The "test" program uses =, not ==, as the test for equality. Fortunately
most implementations are tolerant but it's better to follow the spec.
Ben Pfaff [Wed, 19 Aug 2009 21:14:40 +0000 (14:14 -0700)]
xenserver: Fix "brctl show" compatibility by introducing "brctl" wrapper.
Bug NIC-19, which reported that "brctl show" did not format its output in
the way expected by Citrix QA scripts, was believed fixed by commit
35c979bff4 "vswitchd: Support creating fake bond device interfaces."
Unfortunately, this commit was not tested on a XenServer before it was
committed. Due to differences in the actual test environment and the
XenServer environment, which have different versions of the bridge-utils
package that contains brctl, that commit did not fix the problem observed
by Citrix QA. In particular, the XenServer brctl uses sysfs to obtain
the information displayed by "brctl show", but the previous commit only
fixed up the information output by the bridge ioctls.
The natural way to fix this problem would be to fix up the sysfs support
as well. I started out along that path, but became bogged down in all
the details of the kernel sysfs.
This commit takes an alternate approach, by introducing a wrapper around
the system brctl binary that implements "brctl show" itself and delegates
all other functionality to the original binary (in a different location).
This will not fix tools that do not call into brctl, but to the best of
my knowledge there are no such tools used in the Citrix QA process.
Thanks to Justin and Reid for much feedback.
Bug NIC-19.
Ben Pfaff [Wed, 19 Aug 2009 19:59:56 +0000 (12:59 -0700)]
xenserver: Completely ignore datapath devices for renaming purposes.
Commit
2bb451b69 "xenserver: Rename network devices to match MAC addresses
of physical PIFs" started renaming network devices so that they match
the MAC address that we expect them to have. This worked OK at the time.
Commit
35c979bff "vswitchd: Support creating fake bond device interfaces"
later started creating fake bond devices to make the Citrix QA scripts
happier.
Unfortunately these commits interact badly: the bond devices created by
the latter commit are sometimes chosen as the physical devices to be
renamed over the physical PIF device names. This is because we do allow
datapath internal ports to be chosen as "physical devices" as a last
resort. This commit reverses this decision, eliminating that possibility.
This probably won't become a problem unless somehow we encounter a physical
Ethernet card driver that lacks a queue, but that is unlikely since the
performance would be awful.
Ben Pfaff [Wed, 19 Aug 2009 19:51:27 +0000 (12:51 -0700)]
datapath: Additional fixes for datapath device renaming.
Commit
c874dc6d6b "secchan: Fix behavior when a network device is renamed."
fixed a crash in the datapath when network devices within a datapath were
renamed. However, this missed the case where the device that was renamed
was a datapath's internal port: these devices have their br_port members
set to NULL, so we have to determine that they belong to a datapath another
way. This commit does so.
This commit also changes the initialization order in dp_dev_create().
Otherwise, dp_device_event() will dereference null when it is called via
register_netdevice(), because the newly created device is a datapath device
but its members are not yet initialized.
Ben Pfaff [Wed, 19 Aug 2009 20:03:46 +0000 (13:03 -0700)]
Merge citrix into master.
This was a somewhat difficult merge since there was a fair amount of
superficially divergent development on the two branches, especially in the
datapath.
This has been build-tested against XenServer 5.5.0 and XenServer 5.7.0
build 15122. It has been booted and connected to XenCenter on 5.5.0.
The merge revealed a couple of outstanding bugs, which will be fixed on
citrix and then merged back into master.
Ian Campbell [Thu, 6 Aug 2009 20:51:44 +0000 (13:51 -0700)]
xenserver: Store XAPI dbcache as XML in interface-reconfigure.
This allows the Citrix host installer to also write the dbcache on upgrade
which enables the management interface to come up on a slave after upgrade.
CP-1148.
Ian Campbell [Thu, 6 Aug 2009 20:50:15 +0000 (13:50 -0700)]
xenserver: Whitelist specific XAPI fields to pickle in interface-reconfigure.
Only add certain fields to the database cache of database
objects. This constrains the cases we need to deal with when
pickling/unpickling.
CP-1148.
Ian Campbell [Thu, 6 Aug 2009 20:45:12 +0000 (13:45 -0700)]
xenserver: Only consider the host we are running on in interface-reconfigure.
Drop records for PIFs,bonds,VLANs etc for other hosts at the point at
which we fetch the records from xapi rather than filtering everytime
we iterate through the lists.
CP-1148.
Ian Campbell [Thu, 6 Aug 2009 20:43:21 +0000 (13:43 -0700)]
xenserver: Factor out XAPI interactions in interface-reconfigure.
Currently interface-reconfigure stores a copy of the XAPI database using
python's pickling functionality. Since the XenServer host installer also needs
to write this file (so it is present after slave upgrade) we would like to
switch to something more explicitly under our control.
Begin by factoring out XAPI interactions.
Ben Pfaff [Thu, 6 Aug 2009 20:24:13 +0000 (13:24 -0700)]
switch UI: Only build ovs-switchui if PCRE 7.2 or later is available.
The PCRE_INFO_OKPARTIAL feature used by ovs-switchui was only introduced
in PCRE 7.2, so we need to check for that version or later, instead of
just for PCRE.
Thanks to Ian Campbell <Ian.Campbell@citrix.com> for reporting the problem.
Ian Campbell [Thu, 6 Aug 2009 19:53:27 +0000 (12:53 -0700)]
datapath: Only call skb_checksum_setup on 2.6.18 && Xen.
For newer kernels the checksum setup is done at the point the skb is
received in netback or netfront so there is no more need to sprinkle
skb_checksum_setup calls throughout the kernel.
Ben Pfaff [Mon, 17 Aug 2009 16:30:29 +0000 (09:30 -0700)]
ovs-brcompatd: Don't include the local port in BRCTL_GET_PORT_LIST output.
The BRCTL_GET_PORT_LIST ioctl is not supposed to include the bridge port
itself in the list of ports, but ovs-brcompatd was doing that.
Ben Pfaff [Fri, 14 Aug 2009 20:44:27 +0000 (13:44 -0700)]
ovs-brcompatd: Fix memory leak.
Ben Pfaff [Fri, 14 Aug 2009 20:44:06 +0000 (13:44 -0700)]
ovs-brcompatd: Fix use of uninitialized svec.
Ben Pfaff [Fri, 14 Aug 2009 20:41:44 +0000 (13:41 -0700)]
datapath: Improve comments.
Justin Pettit [Mon, 17 Aug 2009 19:43:59 +0000 (12:43 -0700)]
xenserver: Add missing argument for fake-iface config
The interface-reconfigure script may add the 'fake-iface' configuration
option to the ovs-vswitchd.conf, but neglects to mention the interface.
This resulted in a "bonding.%s.fake-iface=true" line, which is clearly
wrong. This commit corrects that behavior.
Justin Pettit [Thu, 13 Aug 2009 22:14:39 +0000 (15:14 -0700)]
ovs-pki: Add uniqueness to CA certs
When ovs-pki is used for CA cert generation, it generates certificates
that are identical except for the public key. If multiple controllers are
their own certificate authorities, the switch will receive multiple CA
certs that are identical other than their key. Unfortunately, OpenSSL
cannot distinguish between them. This is an excerpt of the
SSL_CTX_load_verify_locations function used by vconn-ssl:
Certificate matching is done based on the subject name, the key
identifier (if present), and the serial number as taken from the
certificate to be verified. If these data do not match, the next
certificate will be tried. If a first certificate matching the
parameters is found, the verification process will be performed; no
other certificates for the same parameters will be searched in case of
failure.
To work around this, we add a bit of uniqueness to each certificate. In
this commit, we add the generation time to the subject name. Please note
that the CN field is limited to 64 bytes, so a bit of name compression
needed to take place in order to fit the time.
Bug #1782
Justin Pettit [Thu, 13 Aug 2009 22:14:39 +0000 (15:14 -0700)]
ovs-pki: Add uniqueness to CA certs
When ovs-pki is used for CA cert generation, it generates certificates
that are identical except for the public key. If multiple controllers are
their own certificate authorities, the switch will receive multiple CA
certs that are identical other than their key. Unfortunately, OpenSSL
cannot distinguish between them. This is an excerpt of the
SSL_CTX_load_verify_locations function used by vconn-ssl:
Certificate matching is done based on the subject name, the key
identifier (if present), and the serial number as taken from the
certificate to be verified. If these data do not match, the next
certificate will be tried. If a first certificate matching the
parameters is found, the verification process will be performed; no
other certificates for the same parameters will be searched in case of
failure.
To work around this, we add a bit of uniqueness to each certificate. In
this commit, we add the generation time to the subject name. Please note
that the CN field is limited to 64 bytes, so a bit of name compression
needed to take place in order to fit the time.
Bug #1782
Justin Pettit [Tue, 11 Aug 2009 01:48:15 +0000 (18:48 -0700)]
mgmt: Local config changes can cause update failures from controller.
If ovs-vswitchd.conf is locally modified, but ovs-vswitchd is not told
to reload it, updates from the controller will be refused. This is
because we attempt to lock the file with SHA-1 snapshot of the config
file. Since the hashes will not match, we will never be able to lock
the file, and all remote updates will fail. There is not much that can
be done about this, since we don't want to presume the current state of
the file is correct, since it could be in the process of being updated.
With this commit, we attempt to detect this problem and log a message
describing how to rectify it.
Bug #1516
Justin Pettit [Tue, 11 Aug 2009 01:09:33 +0000 (18:09 -0700)]
secchan: Clarify log message about failing open.
In commit
e10dfcf357 "rconn: Be pickier about what constitutes a
successful connection", the criteria for determining a successful
OpenFlow connection was tightened. When rconn connects at a socket
level, it prints messages stating that it "connected" and the switch is
taken out of fail-open mode. If it is determined that it is not a
"successful" OpenFlow connection, then the connection is closed and
fail-open is re-enabled. When this occurs, fail-open logs the following
potentially confusing message:
Could not connect to controller for XXX seconds, failing open
Where XXX is the number of seconds since the last "succesful" connection
rather than simple socket-level connection. This commit changes the
message to:
Could not establish OpenFlow channel to controller for XXX
seconds, failing open
Bug #1163
Justin Pettit [Mon, 10 Aug 2009 22:34:13 +0000 (15:34 -0700)]
XenServer: Increase ulimit on open file descriptors in init script
Open vSwitch allows up to 256 datapaths to be created. Each one
requires a few file descriptors. By default, XenServer limits each
process to 1024 file descriptors, which causes us to run out with roughly
140 datapaths. This change raises the limit to 4096, so we've got
additional wiggle room.
Feature #1820
Ben Pfaff [Mon, 10 Aug 2009 21:13:45 +0000 (14:13 -0700)]
xenserver: Configure MTU, Ethtool on PIFs in interface-reconfigure.
MTU and Ethtool settings on physical devices are supposed to come from
the PIF records, but we weren't configuring them at all.
Ben Pfaff [Fri, 7 Aug 2009 21:00:59 +0000 (14:00 -0700)]
xenserver: Obtain Ethtool, MTU, static routes from network instead of PIF.
Our version of interface-reconfigure was pulling the Ethtool, MTU,
and static route configuration for the local port from the PIF for the
local port, but these settings need to come from the network record
instead.
Bug #1798.
Ben Pfaff [Fri, 7 Aug 2009 21:02:50 +0000 (14:02 -0700)]
xenserver: Factor MTU, Ethtool into functions in interface-reconfigure.
interface-reconfigure needs to configure MTU and Ethtool settings not just
on the local port, as it currently does, but on the physical devices as
well. This commit factors out the code for this so that it can be called
from multiple places.
Ben Pfaff [Fri, 7 Aug 2009 20:51:33 +0000 (13:51 -0700)]
xenserver: Rename functions, variables in interface-reconfigure.
This commit adds "get_" prefixes to the physdev_names and physdev_pifs
functions' names, because I want to use those names as variable names,
and then renames variables appropriately.
Ben Pfaff [Fri, 7 Aug 2009 22:45:41 +0000 (15:45 -0700)]
xenserver: Fix typo in adding static routes in interface-reconfigure.
Ben Pfaff [Sat, 8 Aug 2009 00:02:34 +0000 (17:02 -0700)]
xenserver: Bring up physical devices before configuring local port.
If DHCP is in use, then the physical devices have to be up before we
configure the local port, otherwise the DHCP request will never hit the
wire and we have no hope of getting an IP address.
This problem has been here for a long time, but it was masked until
commit
c170afc1 "xenserver: Really take devices down in
interface-reconfigure." actually caused devices to go down and stay down.
Fixes bug #1809 "vswitch upgrade broke the xenserver".
Ben Pfaff [Fri, 7 Aug 2009 17:31:34 +0000 (10:31 -0700)]
brcompat: Remove no-longer-needed #includes.
Ben Pfaff [Fri, 7 Aug 2009 17:30:48 +0000 (10:30 -0700)]
brcompat: Remove requirement that that no datapaths exist at load time.
We previously required that brcompat_mod be loaded before any datapaths
were created, because creation and destruction of datapaths and ports
differed when brcompat_mod was loaded, but the latter is no longer the
case so there is no reason for the former anymore.
Ben Pfaff [Fri, 7 Aug 2009 17:33:41 +0000 (10:33 -0700)]
vswitchd: Support creating fake bond device interfaces.
Citrix QA scripts expect that "brctl show" shows a bond interface for each
bond that is added to a bridge. The only way to do that without modifying
brctl itself is to create an actual network device by that name, so this
commit adds a new bonding configuration key that causes an internal
device by the name of the bond to be created.
This feature is also necessary, but not sufficient, to allow XenCenter to
accurately show the link status and statistics of bridges (bug #1363).
This new configuration key is intentionally undocumented, because I don't
want anyone to use it.
Bug NIC-19.
Ben Pfaff [Fri, 7 Aug 2009 22:11:40 +0000 (15:11 -0700)]
brcompat: Move BRCTL_GET_BRIDGES, BRCTL_GET_PORT_LIST into userspace.
The Citrix QA scripts assume that "brctl show" will show a topology as if
the Linux bridge were still in use; that is, as if there were one bridge
per VLAN and as if bonds were network devices of their own instead of
separate devices. However, we were showing the datapath topology, i.e.
all VLANs and bond devices lumped together into a single datapath. This
commit fixes the VLAN end of the problem, by moving the implementation of
the ioctls that brctl uses into userspace in ovs-brcompatd and putting the
necessary translation logic into ovs-brcompatd.
By itself, this commit does not fix the problem for bonds: the port name
for a bond does not (normally) under Open vSwitch exist as an actual
Linux network device, and thus it has no ifindex, and so ovs-brcompatd
can't pass it back to the kernel to report to brctl. This fix will have
to wait for another commit.
Bug NIC-19.
Ben Pfaff [Thu, 30 Jul 2009 20:56:56 +0000 (13:56 -0700)]
brcompatd: Factor code out of handle_fdb_query_cmd().
An upcoming commit wants to do the same thing in another place, so break
the logic into a function.
Ben Pfaff [Thu, 30 Jul 2009 20:55:24 +0000 (13:55 -0700)]
brcompatd: Fix handle_fdb_query_cmd() return value on error.
handle_fdb_query_cmd() should return an error when an error occurs, but
in this case it was always returning 0, because error is known to have
value 0 at this point.
Nothing really uses the return value here, and so eventually it would make
sense to just change the return type here and in the rest of the
handle_*() functions to void.
Ben Pfaff [Thu, 30 Jul 2009 20:52:27 +0000 (13:52 -0700)]
brcompatd: Break send_reply() up into more functions for flexibility.
Upcoming commits will require sending Netlink messages to the kernel that
have additional attributes. Instead of adding more arguments to
send_reply() to handle these, it's cleaner to break up send_reply() into
two functions and let the caller add those attributes itself.
Ben Pfaff [Thu, 30 Jul 2009 20:45:52 +0000 (13:45 -0700)]
brcompatd: Make parse_command() parse commands without dp arguments.
The BRCTL_GET_BRIDGES ioctl is going to move to userspace, but that ioctl
doesn't provide a bridge name as argument, so we need to support that.
Ben Pfaff [Thu, 30 Jul 2009 20:41:21 +0000 (13:41 -0700)]
svec: New convenience macro SVEC_FOR_EACH.
Ben Pfaff [Fri, 7 Aug 2009 17:11:01 +0000 (10:11 -0700)]
datapath: Unexport functions only used in openvswitch_mod.
Ben Pfaff [Fri, 7 Aug 2009 21:46:58 +0000 (14:46 -0700)]
xenserver: Fix infinite recursion in get_netdev_by_mac.
Oops.
Justin Pettit [Fri, 7 Aug 2009 18:09:56 +0000 (11:09 -0700)]
dpif: Only clear 'all_dps' argument in dp_enumerate().
Originally, the function dp_enumerate() initialized the 'all_dps'
argument. This is inconsistent with most other functions that take an
svec argument, which would only clear the contents. Further, if someone
were not careful when reusing the svec, it could lead to memory leaks.
With this change, the caller is expected to first call svec_init() on
the argument.
Justin Pettit [Wed, 5 Aug 2009 23:02:19 +0000 (16:02 -0700)]
XenServer: Add knowledge of vswitch to xen-bugtool
The xen-bugtool tool gathers information that may be useful in debugging
problems. This commit modifies that script to add support for vswitch.
Currently, the information we collect is:
- /etc/ovs-vswitchd.conf
- ovs-dpctl show
- Cores in /var/xen/vswitch
- ovs-ofctl show <bridges>
- ovs-ofctl status <bridges>
- ovs-ofctl dump-flows <bridges>
- ovs-dpctl dump-flows <bridges>
This commit also modifies the way cores are handled. They are now
enabled by default and placed in "/var/xen/vswitch".
Feature #1570
Justin Pettit [Wed, 5 Aug 2009 21:20:24 +0000 (14:20 -0700)]
daemon: Remove short options from daemon library
The daemon library provides a few short options, but these then take
away their availability from programs that wish to use the library.
Since the daemon options are generally going to be called from a script
(which doesn't care how much typing is involved), we'll only provide
long options.
Justin Pettit [Wed, 5 Aug 2009 21:16:38 +0000 (14:16 -0700)]
secchan: Remove mention of "-f" flag as being equivalent "--fail"
In an error message, it mentions a required argument to "-f or --fail",
but "-f" is not a short form of "--fail".
Justin Pettit [Wed, 5 Aug 2009 05:41:46 +0000 (22:41 -0700)]
daemon: Provide option to not chdir to root
By default, Open vSwitch daemons change their working directories to the
root directory. This commit provides a --no-chdir option to prevent this
behavior.
Justin Pettit [Tue, 4 Aug 2009 22:15:48 +0000 (15:15 -0700)]
ovs-dpctl: Remove UNUSED attributed in do_show
The do_show() function declared the argc argument as UNUSED, but it
always is.
Justin Pettit [Tue, 4 Aug 2009 22:13:40 +0000 (15:13 -0700)]
ovs-dpctl: Add dump-dps command
The "dump-dps" command prints the name of each datapath on a separate
line.
Ian Campbell [Thu, 6 Aug 2009 20:39:24 +0000 (13:39 -0700)]
xenserver: Cope gracefully with non-integer MTU in interface-reconfigure.
CP-1148.
Ian Campbell [Thu, 6 Aug 2009 21:11:10 +0000 (14:11 -0700)]
xenserver: Log attempts to enable promiscuous mode for bridge ports on vif plug.
This functionality is replaced by vSwitch support for SPAN/RSPAN.
CP-1148.
Ian Campbell [Thu, 6 Aug 2009 20:34:56 +0000 (13:34 -0700)]
xenserver: Update copyright on interface-configure and vif hotplug script.
CP-1148.
Ben Pfaff [Fri, 7 Aug 2009 00:01:53 +0000 (17:01 -0700)]
xenserver: Rename network devices to match MAC addresses of physical PIFs.
XenServer does not rely on Linux to keep the naming of network devices
stable from one boot to the next. Instead, it requires
interface-reconfigure to ensure that network devices are named such that
they have the MAC address specified for the corresponding physical PIF
in the xapi database.
At one point, we fulfilled this requirement by calling out to the Centos
ifup/ifdown scripts, which rename netdevs as necessary to match the
"HWADDR=" lines in /etc/sysconfig/network-scripts/ifcfg-<devname>. When
we rewrote interface-reconfigure not to use those scripts, however, we
accidentally dropped that support. This commit adds back in that renaming.
Bug NIC-20.
Ben Pfaff [Wed, 5 Aug 2009 21:53:48 +0000 (14:53 -0700)]
xenserver: Add new helper function to interface-reconfigure.
This will be useful in the followin commit.
Ben Pfaff [Wed, 5 Aug 2009 21:50:54 +0000 (14:50 -0700)]
vswitchd: Fix use of uninitialized variable in bridge_pick_local_hw_addr().
When a port's MAC is explicitly specified in the config file, we did not
initialize 'iface' and therefore later we could dereference a wild pointer.
This commit fixes the problem.
Ben Pfaff [Wed, 5 Aug 2009 21:47:16 +0000 (14:47 -0700)]
secchan: Fix behavior when a network device is renamed.
update_port() deals with the case where we have been notified that a
network device with a given name, that is part of the datapath, has changed
in some way. In particular it breaks the problem space up into ports that
have been added, deleted, or modified.
But the code here deals badly with the case where the only change is that
the network device associated with a port has been renamed (which is
reported to it with 'devname' as the network device's new named): it
looks up devname in the ofproto's index by name and doesn't find it, then
it looks up the port number assigned to the netdev in the ofproto's index
by datapath index and sees that there already is one. This makes it
think that it's a new port, but with a port number that conflicts with an
existing port (under the old name for the port), which makes it discard
the notification and keep the old netdev name, and so afterward nothing
on the netdev will work since it still has the old netdev name.
This rewrite fixes the problem and simplifies the code.
Ben Pfaff [Wed, 5 Aug 2009 21:36:21 +0000 (14:36 -0700)]
datapath: Update sysfs links when network devices are renamed.
We create symlinks from /sys/class/net/<bridgename>/brif/<devname> to
/sys/class/net/<devname>/brport, but until now we have never updated the
links when network devices are renamed. This commit fixes this problem.
(Only the <devname> in /sys/class/net/<bridgename>/brif/<devname> needs to
be updated. Symlinks within sysfs have stable targets; that is, no matter
how the object that a sysfs symlink points to moves around, the link is
still maintained correctly.)
Ben Pfaff [Wed, 5 Aug 2009 22:22:25 +0000 (15:22 -0700)]
datapath: Fix OOPS when dp_sysfs_add_if() fails.
Until now, when dp_sysfs_add_if() failed, the caller ignored the failure.
This is a minor problem, because everything else should continue working,
without sysfs entries for the interface, in theory anyhow. In actual
practice, the error exit path of dp_sysfs_add_if() does a kobject_put(),
and that kobject_put() calls release_nbp(), so that the new port gets
freed. The next reference to the new port (usually in an ovs-vswitchd call
to the ODP_PORT_LIST ioctl) will then use the freed data and probably OOPS.
The fix is to make the datapath code, as opposed to the sysfs code,
responsible for creating and destroying the net_bridge_port kobject. The
dp_sysfs_{add,del}_if() functions then just attach and detach the kobject
to sysfs and their cleanup routines no longer need to destroy the kobject
and indeed we don't care whether dp_sysfs_add_if() really succeeds.
This commit also makes the same transformation to the datapath's ifobj,
for consistency.
It is easy to trigger the OOPS fixed by this commit by adding a network
device A to a datapath, then renaming network device A to B, then renaming
network device C to A, then adding A to the datapath. The last attempt to
add A will fail because a file named /sys/class/net/<datapath>/brif/A
already exists from the time that C was added to the datapath under the
name A.
This commit also adds some compatibility infrastructure, because it moves
code out of #ifdef SUPPORT_SYSFS and it otherwise wouldn't build.
Ben Pfaff [Wed, 5 Aug 2009 20:45:13 +0000 (13:45 -0700)]
datapath: Prepare to extend lifetime of kobjects.
The following commit will move the initialization of the datapath and
net_bridge_port kobjects earlier and the destruction later, without
changing when those kobjects are attached to sysfs. To do so, the
initialization of kobjects and attaching to sysfs has to be done as
separate steps. That's already the case for net_bridge_port kobjects, and
this commit makes it so for datapath kobjects too.
This commit also simplifies some code, since the split API exists both
before and after 2.6.25, but the combined functions changed names.
Also, in dp_sysfs_add_if() call kobject_init() after initializing the
kset member, since kobject_init() expects that. This makes no actual
difference in this case since the kobj is obtained from kzalloc(), but
it still seems better.
Ben Pfaff [Wed, 5 Aug 2009 19:56:23 +0000 (12:56 -0700)]
datapath: Rename brc_sysfs_* to dp_sysfs_*.
These files and names are now part of the datapath, not brcompat, so name
them appropriately so as not to confuse anyone.
Ben Pfaff [Wed, 5 Aug 2009 19:51:30 +0000 (12:51 -0700)]
datapath: Move sysfs support from brcompat_mod into openvswitch_mod.
In the past problems have arisen due to the different ways that datapaths
are created and destroyed in the three different cases:
1. sysfs supported, brcompat_mod loaded.
2. sysfs supported, brcompat_mod not loaded.
3. sysfs not supported.
The brcompat_mod loaded versus not loaded distinction is the stickiest
because we have to do all the calls into brcompat_mod through hook
functions, which in turn causes pressure to keep the number of hook
functions small and well-defined, which makes it really difficult to put
the hook call points at exactly the right place. Witness, for example,
this piece of code in datapath.c:
int dp_del_port(struct net_bridge_port *p)
{
ASSERT_RTNL();
#ifdef SUPPORT_SYSFS
if (p->port_no != ODPP_LOCAL && dp_del_if_hook)
sysfs_remove_link(&p->dp->ifobj, p->dev->name);
#endif
The code inside the #ifdef is logically part of the brcompat_mod sysfs
support, but the author of this code (quite reasonably) didn't want to
add a hook function call there. After all, what would you call the
hook function? There's no obvious name from the dp_del_port() caller's
perspective.
All this argues that sysfs support should be in openvswitch_mod itself,
since it has to be tightly integrated, not bolted on. So this commit
moves it there.
Now, this is not to say that openvswitch_mod should actually be
implementing bridge-compatible sysfs. In the future, it probably should
not be; rather, it should implement something appropriate for Open vSwitch
datapaths instead. But right now we have bridge-compatible sysfs, and so
that's what this commit moves.
Ben Pfaff [Wed, 5 Aug 2009 18:39:03 +0000 (11:39 -0700)]
xenserver: Really take devices down in interface-reconfigure.
When down_netdev was called with deconfigure=True (which is the default),
it would invoke, e.g. "/sbin/ifconfig eth0 down 0.0.0.0", with the
intention of taking the interface down and removing any IP address from it
at the same time.
In fact, this removed any IP address from it and brought the device *up*,
because ifconfig executes its commands in the order that they are
specified, and setting or unsetting an IP address brings a device up.
We could specify the commands in the opposite order ("0.0.0.0 down") but
it seems to me more obviously correct to just run ifconfig twice, so that
is what this commit does.
This commit could break things, because it could be that there is a bug
elsewhere that depends on down_netdev not actually bringing a device down,
but it is needed for the upcoming device renaming commit (to fix bug
NIC-20), because a network device has to be down to be renamed.
Ben Pfaff [Wed, 5 Aug 2009 20:09:15 +0000 (13:09 -0700)]
brcompat: Add comments to sysfs code.
I got tired of figuring out over and over what these function calls do.
Ben Pfaff [Thu, 6 Aug 2009 17:33:26 +0000 (10:33 -0700)]
vswitchd: Fix logged warnings for new internal ports.
Justin reported that adding an internal port to a bridge caused
ovs-vswitchd to log a pair of warnings. This commit suppresses those
warnings, which were harmless.
Justin Pettit [Sat, 1 Aug 2009 07:09:56 +0000 (00:09 -0700)]
datapath: Support jumbo frames in the datapath device
The datapath has no problems switching jumbo frames (frames with a payload
greater than 1500 bytes), but it has not supported sending and receiving
them to the device itself. With this commit, the MTU can be set as large
as the minimum MTU size of the devices that are directly attached, or 1500
bytes if there are none. This mimics the behavior of the Linux bridge.
Feature #1736
Justin Pettit [Sat, 1 Aug 2009 08:03:23 +0000 (01:03 -0700)]
vswitchd: Initialize cfg properly and check return values
A previous checkin added the cfg_init() function, so we now call it. We
also check the return value of the initial call to cfg_read(), since if
it fails, there's not much point in continuing.
Justin Pettit [Sat, 1 Aug 2009 07:58:31 +0000 (00:58 -0700)]
cfg: Terminate cfg to prevent crashes
If cfg_* accessor calls were made before cfg_read() was called (or it
returned error), they could cause segfault. This checkin terminates the
cfg structure in such a way that will prevent these run-time problems.
Bug #1693
Ben Pfaff [Fri, 31 Jul 2009 00:10:13 +0000 (17:10 -0700)]
Fix broken build by making "make dist" include lib/netdev-provider.h.
Ben Pfaff [Tue, 28 Jul 2009 20:05:20 +0000 (13:05 -0700)]
rtnetlink: Move into separate source and header file.
Now that rtnetlink isn't named similarly to netdev_linux, it might as well
have its own source and header files to avoid confusing everyone.
Ben Pfaff [Tue, 28 Jul 2009 19:38:14 +0000 (12:38 -0700)]
rtnetlink: Document.
Ben Pfaff [Tue, 28 Jul 2009 19:36:32 +0000 (12:36 -0700)]
netdev-linux: Rename "linux_netdev_*" to "rtnetlink_*".
It was getting to be too confusing to have both netdev_linux_* functions
and linux_netdev_* functions. Rename the latter to make the distinction
more obvious. "rtnetlink" seems to be a fairly good name because that's
what the kernel calls it, so the name will be familiar at least to people
who know about rtnetlink.
Ben Pfaff [Thu, 30 Jul 2009 23:04:45 +0000 (16:04 -0700)]
netdev: Implement an abstract interface to network devices.
This new abstraction layer allows multiple implementations of network
devices in a single running process. This will be useful, for example, to
support network devices that are simulated entirely in the running process
or that communicate with other processes over Unix domain sockets, etc.
The reimplemented tap device support in this commit has not been tested.
Ben Pfaff [Thu, 23 Jul 2009 21:49:52 +0000 (14:49 -0700)]
netdev: Remove netdev_nodev_*() functions.
These functions are now unused, so they may be deleted.
Ben Pfaff [Thu, 23 Jul 2009 20:36:08 +0000 (13:36 -0700)]
netdev: Make netdev_get_vlan_vid() take a netdev instead of a name.
For consistency, it's best if every netdev function takes a netdev instead
of a device name. The netdev_nodev_*() functions have always been a bit
ugly.
Ben Pfaff [Thu, 23 Jul 2009 21:50:55 +0000 (14:50 -0700)]
vswitchd: Avoid netdev_nodev_*() functions.
The netdev_nodev_*() functions have always been a bit of a kluge. It's
better to keep a network device open than to open it every time that it is
needed. This commit converts all of the users of these functions to use
the corresponding functions that take a "struct netdev *" instead.
Ben Pfaff [Thu, 23 Jul 2009 23:49:19 +0000 (16:49 -0700)]
vswitchd: Avoid netdev_nodev_set_policing().
The netdev_nodev_*() functions have always been a bit of a kluge. It's
better to keep a network device open than to open it every time that it is
needed.
Ben Pfaff [Fri, 24 Jul 2009 00:09:43 +0000 (17:09 -0700)]
netdev: Make netdev_find_dev_by_in4() use netdevs, not device names.
The netdev_nodev_*() functions have always been a bit of a kluge. It's
better to keep a network device open than to open it every time that it is
needed.
Also updates the only user of netdev_find_dev_by_in4().
Ben Pfaff [Thu, 23 Jul 2009 21:28:21 +0000 (14:28 -0700)]
vswitchd: Don't keep track of mac in struct iface.
It's easy to get the Ethernet address of the interface from the netdev
code, and so we don't have to keep track of it in the bridge too.
Ben Pfaff [Thu, 30 Jul 2009 23:00:41 +0000 (16:00 -0700)]
vswitchd: Keep a netdev open for each interface.
This will allow the vswitch to use the netdev functions that take a
netdev parameter instead of the ones that take a device name.
Ben Pfaff [Thu, 30 Jul 2009 22:56:17 +0000 (15:56 -0700)]
vswitchd: Factor out iteration over interfaces with deletion.
Two different pieces of code in vswitchd were both iterating over all
the interfaces in a bridge and deleting some of them, then deleting any
ports that ended up with no interfaces because of this. This commit
factors this operation out into a helper function.
Ben Pfaff [Tue, 28 Jul 2009 18:01:44 +0000 (11:01 -0700)]
ofproto: Don't use netdev_nodev_get_etheraddr() in pick_datapath_id().
The netdev_nodev_*() functions have always been a bit of a kluge. It's
better to keep a network device open than to open it every time that it is
needed.
This commit gets rid of a usage of netdev_nodev_get_etheraddr() in
pick_datapath_id(), by using the netdev that the datapath already has open
for the local port.
Ben Pfaff [Thu, 23 Jul 2009 19:18:14 +0000 (12:18 -0700)]
netdev: Add 'netdev' parameter to netdev_add_router().
When there is the possibility of multiple classes of netdevs,
netdev_add_router() needs to know which of these to use, so it needs a
"struct netdev *" parameter.
Ben Pfaff [Thu, 23 Jul 2009 17:42:48 +0000 (10:42 -0700)]
netdev: New function netdev_exists().
This new function allows cleanup of code that was using
netdev_nodev_get_flags() or ad-hoc methods to detect whether a network
device with the given name exists.
Ben Pfaff [Thu, 23 Jul 2009 19:21:11 +0000 (12:21 -0700)]
netdev: Get rid of netdev_open_tap().
netdev_open() can always be used in place of netdev_open_tap(). The
former is going to be generalized to support pluggable network device
types, so it makes sense to use it everywhere.
Ben Pfaff [Tue, 28 Jul 2009 20:43:52 +0000 (13:43 -0700)]
netdev: Change netdev_get_in4() to return an error code.
Until now, netdev_get_in4() and netdev_nodev_get_in4() have returned a
bool that represents success or failure. This commit changes the return
value to an int that can indicate what kind of error occurred, which is
both more consistent with the rest of the netdev interfaces and more
meaningful, and updates all callers to the new interface.
(Currently netdev_get_in4() won't ever return an error, but other future
implementations might.)
Ben Pfaff [Tue, 28 Jul 2009 20:43:35 +0000 (13:43 -0700)]
netdev: Change netdev_get_mtu() to return an error code.
To make the netdev code more portable, it needs to support returning error
codes from functions that don't have them. This commit changes
netdev_get_mtu() to return an error code and updates its caller.
(Currently netdev_get_mtu() won't ever return an error, but other future
implementations might.)
Ben Pfaff [Tue, 28 Jul 2009 20:31:49 +0000 (13:31 -0700)]
netdev: Change netdev_get_etheraddr() to return an error code.
To make the netdev code more portable, it needs to support returning error
codes from functions that don't have them. This commit changes
netdev_get_etheraddr() to return an error code and updates all of its
callers.
(Currently netdev_get_etheraddr() won't ever return an error, but other
future implementations might.)
Ben Pfaff [Wed, 22 Jul 2009 23:33:43 +0000 (16:33 -0700)]
shash: Introduce new macros SHASH_FOR_EACH, SHASH_FOR_EACH_SAFE.
This is both more convenient and cleaner than using HMAP_FOR_EACH(_SAFE)
directly.
Ben Pfaff [Tue, 28 Jul 2009 20:29:57 +0000 (13:29 -0700)]
shash: Make shash_add() return the new node.
Ben Pfaff [Wed, 29 Jul 2009 16:56:46 +0000 (09:56 -0700)]
vswitchd: Update /proc/net/bonding when bonded port properties change.
Until now ovs-vswitchd has created the files in /proc/net/bonding, but not
updated them, because there was little need. But the Citrix QA tests check
that the list of bond hashes in that file is kept up-to-date, so we need
to update them whenever the bond hashes (or other data in the file) change.
This commit does that.
Bug NIC-16.
Ben Pfaff [Wed, 29 Jul 2009 00:10:10 +0000 (17:10 -0700)]
vswitchd: Add bond hashes to /proc/net/bonding compatibility layer.
The Citrix QA scripts require the bond hashes and their assigned devices
to be noted in /proc/net/bonding. We weren't doing that, so this commit
adds them.
Bug NIC-16.
Justin Pettit [Thu, 30 Jul 2009 06:37:28 +0000 (23:37 -0700)]
XenServer: Correct license in spec file
The license file indicated that the software is licensed under the GPLv3
license. This commit corrects that to state that it's licensed under
the Apache 2.0 license with the exception of the "datapath" directory,
which is GPLv2. The style and abbreviations were from the following
page:
http://fedoraproject.org/wiki/Packaging/LicensingGuidelines
Justin Pettit [Tue, 14 Jul 2009 20:03:57 +0000 (13:03 -0700)]
vswitchd: Add unixctl command to dump all flows, including hidden ones
Previously, the only way to query the flow table was to run "ovs-ofctl
dump-flows". This returned most flows, but not those marked hidden by
secchan. Hidden flows are setup by mechanisms such as in-band control,
since they must not be modified by users of the controller. However,
when debugging problems on the switch, it is often useful to see what
the flow table is actually doing. The new "bridge/dump-flows" command
added to ovs-appctl shows all flows being used by the OpenFlow stack.
Ben Pfaff [Thu, 30 Jul 2009 00:04:10 +0000 (17:04 -0700)]
Always distribute extras/ezio/ezio3.ti.
I had thought that Automake was smart enough to ignore conditionals around
EXTRA_DIST, so that all files always got distributed regardless of whether
Automake conditionals were set. I was wrong.
This pushes the conditionals for building the ezio binaries down into
extras/ezio/automake.mk and thereby makes adding ezio3.ti to EXTRA_DIST
unconditional, so that it always gets distributed. Otherwise, this file
will not be distributed on systems that don't have curses or don't have
PCRE, which is very surprising.
Ben Pfaff [Wed, 29 Jul 2009 23:48:45 +0000 (16:48 -0700)]
Remove --disable-userspace "configure" option, since it breaks "make dist".
I had thought that Automake was smart enough to ignore conditionals around
EXTRA_DIST, so that all files always got distributed regardless of whether
Automake conditionals were set. I was wrong.
This commit removes the --disable-userspace option to "configure", which
put a conditional around most of Makefile.am and thus unintentionally
caused most of the distribution to be left out if --disable-userspace was
specified. The alternative (fixing --disable-userspace) seems like too
much work--it would require pushing "if ENABLE_USERSPACE" down into lots
of subdirectory--and would be difficult to maintain.
Justin Pettit [Thu, 16 Jul 2009 22:02:53 +0000 (15:02 -0700)]
Fix DHCP request source port and add port #define's
DHCP requests were sent with a source port of 66, when it should be 68.
This code has been tested, so apparently many DHCP servers don't pay
attention to the source port. This commit also adds #define's for the
DHCP ports, so that magic numbers don't need to be used.
Justin Pettit [Thu, 16 Jul 2009 22:21:47 +0000 (15:21 -0700)]
Fix tab/space issue in datapath-protocol.h