OK, thanks.
There might already be a way to figure out when OVS restarts. Have you
looked through the existing configuration schema to try to find one?
On Apr 22, 2014 7:18 PM, "Ryan Wilson 76511" <wr...@vmware.com> wrote:
> I agree, this makes much more sense. We could add this restart tag to the
> Open_vSwitch table instead, so the controller team could still do
> event-based triggering on database changes. Also, this would clearly
> separate the cases of a port being deleted and re-added (uuid changing in
> Interface table) and OVS restarting (change in restart tag in Open_vSwitch).
>
> I'm new to OVS, so there are likely better ideas out there. Let me know if
> you guys have a better approach to this problem.
>
> Ryan
>
> ------------------------------
> *From: *"Ben Pfaff" <b...@nicira.com>
> *To: *"Ethan" <et...@nicira.com>
> *Cc: *dev@openvswitch.org, "Ryan Wilson 76511" <wr...@vmware.com>
> *Sent: *Tuesday, April 22, 2014 6:52:27 PM
> *Subject: *Re: [ovs-dev] [PATCH] netdev: Add random tag to struct netdev.
>
> It would make a lot more sense to have a global indication whether OVS was
> restarted. This is a property of OVS, not of a netdev. Otherwise we'll get
> subsequent requests to add such a random tag to every single table in the
> database.
>
> You can already tell if a port is deleted and readded by noticing the
> change in UUID.
> On Apr 22, 2014 6:14 PM, "Ethan Jackson" <et...@nicira.com> wrote:
>
>> > I don't understand why, if you need to know when vswitchd restarts (why
>> do
>> > you?), it should be tied to netdevs.
>>
>> So if you're monitoring a netdev for packet stats, you need to know if
>> vswitchd restarted so that you can take account of the fact the stats
>> were reset. I suppose it needs to be tied to netdevs to take account
>> of the case when a tunnel is removed and re-added for whatever reason.
>>
>> Does that make sense? If so, an explanation of the sort should be
>> added to the commit message.
>>
>> Ethan
>>
>> >
>> > On Apr 22, 2014 4:09 PM, "Ryan Wilson 76511" <wr...@vmware.com> wrote:
>> >>
>> >> netdev: Add random tag to struct netdev.
>> >>
>> >>
>> >> Before, there would be no way to tell if ovs-vswitchd had
>> >> been restarted or killed via ovsdb logging. Now, a random
>> >> tag will be generated upon initialization of the netdev
>> >> struct which happens when ovs-vswitchd is restarted. A
>> >> change in tag value in ovsdb's Interface table likely
>> >> indicates that ovs-vswitchd has been restarted or killed.
>> >>
>> >> Signed-off-by: Ryan Wilson <wr...@vmware.com>
>> >>
>> >> ---
>> >>
>> >> diff --git a/lib/netdev-provider.h b/lib/netdev-provider.h
>> >>
>> >> index 9d8e67f..ea2e59c 100644
>> >> --- a/lib/netdev-provider.h
>> >> +++ b/lib/netdev-provider.h
>> >> @@ -40,6 +40,11 @@ struct netdev {
>> >> const struct netdev_class *netdev_class; /* Functions to control
>> >> this device. */
>> >>
>> >> + /* A random number generated upon initialization of the netdev
>> struct.
>> >> + * If this number changes, the netdev struct has been re-initialized,
>> >> + * likely indicating ovs-vswitchd has restarted. */
>> >> + uint32_t tag;
>> >> +
>> >> /* A sequence number which indicates changes in one of 'netdev''s
>> >> * properties. It must be nonzero so that users have a value which
>> >> * they may use as a reset when tracking 'netdev'.
>> >> diff --git a/lib/netdev.c b/lib/netdev.c
>> >> index 4736a97..70cb3e8 100644
>> >> --- a/lib/netdev.c
>> >> +++ b/lib/netdev.c
>> >> @@ -340,6 +340,7 @@ netdev_open(const char *name, const char *type,
>> struct
>> >> netdev **netdevp)
>> >> netdev->name = xstrdup(name);
>> >> netdev->change_seq = 1;
>> >> netdev->node = shash_add(&netdev_shash, name, netdev);
>> >> + netdev->tag = random_uint32();
>> >>
>> >> /* By default enable one rx queue per netdev. */
>> >> if (netdev->netdev_class->rxq_alloc) {
>> >> @@ -664,6 +665,13 @@ netdev_set_etheraddr(struct netdev *netdev, const
>> >> uint8_t mac[ETH_ADDR_LEN])
>> >> return netdev->netdev_class->set_etheraddr(netdev, mac);
>> >> }
>> >>
>> >> +/* Retrieves 'netdev''s random tag generated upon initialization. */
>> >> +int
>> >> +netdev_get_tag(const struct netdev *netdev)
>> >> +{
>> >> + return (int) netdev->tag;
>> >> +}
>> >> +
>> >> /* Retrieves 'netdev''s MAC address. If successful, returns 0 and
>> copies
>> >> the
>> >> * the MAC address into 'mac'. On failure, returns a positive errno
>> value
>> >> and
>> >> * clears 'mac' to all-zeros. */
>> >> diff --git a/lib/netdev.h b/lib/netdev.h
>> >> index 7cb3c80..169d595 100644
>> >> --- a/lib/netdev.h
>> >> +++ b/lib/netdev.h
>> >> @@ -158,6 +158,7 @@ const char *netdev_get_type_from_name(const char
>> *);
>> >> int netdev_get_mtu(const struct netdev *, int *mtup);
>> >> int netdev_set_mtu(const struct netdev *, int mtu);
>> >> int netdev_get_ifindex(const struct netdev *);
>> >> +int netdev_get_tag(const struct netdev *netdev);
>> >>
>> >> /* Packet reception. */
>> >> int netdev_rxq_open(struct netdev *, struct netdev_rxq **, int id);
>> >> diff --git
>> >> a/tests/ofproto-macros.at<https://urldefense.proofpoint.com/v1/url?u=http://ofproto-macros.at&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=414d2eefdb07ca1f2066c36e33a7e6b09070f00a30d3d4cc3aced9c5e59a485b>b/tests/
>> ofproto-macros.at<https://urldefense.proofpoint.com/v1/url?u=http://ofproto-macros.at&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=414d2eefdb07ca1f2066c36e33a7e6b09070f00a30d3d4cc3aced9c5e59a485b>
>> >> index a82a9b1..ad2f342 100644
>> >> ---
>> >> a/tests/ofproto-macros.at<https://urldefense.proofpoint.com/v1/url?u=http://ofproto-macros.at&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=414d2eefdb07ca1f2066c36e33a7e6b09070f00a30d3d4cc3aced9c5e59a485b>
>> >> +++
>> >> b/tests/ofproto-macros.at<https://urldefense.proofpoint.com/v1/url?u=http://ofproto-macros.at&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=414d2eefdb07ca1f2066c36e33a7e6b09070f00a30d3d4cc3aced9c5e59a485b>
>> >> @@ -38,6 +38,31 @@ m4_define([STRIP_DURATION], [[sed
>> >> 's/\bduration=[0-9.]*s/duration=?s/']])
>> >> m4_define([STRIP_USED], [[sed 's/used:[0-9]\.[0-9]*/used:0.0/']])
>> >> m4_define([TESTABLE_LOG], [-vPATTERN:ANY:'%c|%p|%m'])
>> >>
>> >> +# OVS_VSWITCHD_CHECK_STDERR
>> >> +#
>> >> +# Checks ovs-vswitchd stderr output on startup for consistent
>> messages.
>> >> +m4_define([OVS_VSWITCHD_CHECK_STDERR],
>> >> + [AT_CHECK([[sed < stderr '
>> >> +/vlog|INFO|opened log file/d
>> >> +/vswitchd|INFO|ovs-vswitchd (Open vSwitch)/d
>> >> +/reconnect|INFO|/d
>> >> +/ofproto_dpif|INFO|/d
>> >> +/ofproto_dpif|DBG|need revalidate in ofproto_wait_cb()/d
>> >> +/bridge|INFO|/d
>> >> +/connmgr|INFO|/d
>> >> +/ofproto|INFO|using datapath ID/d
>> >> +/ofproto|INFO|datapath ID changed to fedcba9876543210/d']])])
>> >> +
>> >> +# OVS_VSWITCHD_SETENV
>> >> +#
>> >> +# Sets environment variables for ovs-server and ovs-vswitchd
>> processes.
>> >> +m4_define([OVS_VSWITCHD_SETENV],
>> >> + [OVS_RUNDIR=`pwd`; export OVS_RUNDIR
>> >> + OVS_LOGDIR=`pwd`; export OVS_LOGDIR
>> >> + OVS_DBDIR=`pwd`; export OVS_DBDIR
>> >> + OVS_SYSCONFDIR=`pwd`; export OVS_SYSCONFDIR
>> >> + ON_EXIT([kill `cat ovsdb-server.pid ovs-vswitchd.pid`])])
>> >> +
>> >> # OVS_VSWITCHD_START([vsctl-args], [vsctl-output], [=override])
>> >> #
>> >> # Creates a database and starts ovsdb-server, starts ovs-vswitchd
>> >> @@ -52,11 +77,7 @@ m4_define([TESTABLE_LOG],
>> [-vPATTERN:ANY:'%c|%p|%m'])
>> >> # won't work at all (which makes sense because tests should not access
>> a
>> >> # system's real Ethernet devices).
>> >> m4_define([OVS_VSWITCHD_START],
>> >> - [OVS_RUNDIR=`pwd`; export OVS_RUNDIR
>> >> - OVS_LOGDIR=`pwd`; export OVS_LOGDIR
>> >> - OVS_DBDIR=`pwd`; export OVS_DBDIR
>> >> - OVS_SYSCONFDIR=`pwd`; export OVS_SYSCONFDIR
>> >> - ON_EXIT([kill `cat ovsdb-server.pid ovs-vswitchd.pid`])
>> >> + [OVS_VSWITCHD_SETENV
>> >>
>> >> dnl Create database.
>> >> touch .conf.db.~lock~
>> >> @@ -75,12 +96,7 @@ m4_define([OVS_VSWITCHD_START],
>> >> dnl Start ovs-vswitchd.
>> >> AT_CHECK([ovs-vswitchd --detach --no-chdir --pidfile --enable-dummy$3
>> >> --disable-system --log-file -vvconn -vofproto_dpif], [0], [], [stderr])
>> >> AT_CAPTURE_FILE([ovs-vswitchd.log])
>> >> - AT_CHECK([[sed < stderr '
>> >> -/vlog|INFO|opened log file/d
>> >> -/vswitchd|INFO|ovs-vswitchd (Open vSwitch)/d
>> >> -/reconnect|INFO|/d
>> >> -/ofproto|INFO|using datapath ID/d
>> >> -/ofproto|INFO|datapath ID changed to fedcba9876543210/d']])
>> >> + OVS_VSWITCHD_CHECK_STDERR
>> >>
>> >> dnl Add bridges, ports, etc.
>> >> AT_CHECK([ovs-vsctl -- add-br br0 -- set bridge br0 datapath-type=dummy
>> >> other-config:datapath-id=fedcba9876543210
>> >> other-config:hwaddr=aa:55:aa:55:00:00
>> >> protocols=[[OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13]]
>> fail-mode=secure
>> >> -- $1 m4_if([$2], [], [], [| ${PERL}
>> >> $srcdir/uuidfilt.pl<https://urldefense.proofpoint.com/v1/url?u=http://uuidfilt.pl&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=69493947b5984f6f80f3460b854f0bc8e089750e83e0142faf77da1105eca3c0>])],
>> [0], [$2])
>> >> @@ -112,6 +128,23 @@ m4_define([OVS_VSWITCHD_STOP],
>> >> AT_CHECK([ovs-appctl -t ovs-vswitchd exit])
>> >> AT_CHECK([ovs-appctl -t ovsdb-server exit])])
>> >>
>> >> +# RESTART_OVS_VSWITCHD([=override])
>> >> +#
>> >> +# Restarts ovs-vswitchd.
>> >> +#
>> >> +# If a test needs to use "system" devices (as dummies), then specify
>> >> +# =override (literally) as the first argument. Otherwise, system
>> devices
>> >> +# won't work at all (which makes sense because tests should not
>> access a
>> >> +# system's real Ethernet devices).
>> >> +m4_define([RESTART_OVS_VSWITCHD],
>> >> + [OVS_VSWITCHD_SETENV
>> >> + AT_CHECK([ovs-appctl -t ovs-vswitchd exit])
>> >> +
>> >> + dnl Restart ovs-vswitchd.
>> >> + AT_CHECK([ovs-vswitchd --detach --no-chdir --pidfile --enable-dummy$2
>> >> --disable-system --log-file -vvconn -vofproto_dpif], [0], [], [stderr])
>> >> + AT_CAPTURE_FILE([ovs-vswitchd.log])
>> >> + OVS_VSWITCHD_CHECK_STDERR])
>> >> +
>> >> # ADD_OF_PORTS(BRIDGE, OF_PORT[, OF_PORT...])
>> >> #
>> >> # Creates a dummy interface with an OpenFlow port number of OF_PORT and
>> >> diff --git
>> >> a/tests/ovs-vsctl.at<https://urldefense.proofpoint.com/v1/url?u=http://ovs-vsctl.at&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=cdb4082265a4daea2deb33bcd848a004e2eca8323709f0a890e7d3989501c6c5>b/tests/
>> ovs-vsctl.at<https://urldefense.proofpoint.com/v1/url?u=http://ovs-vsctl.at&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=cdb4082265a4daea2deb33bcd848a004e2eca8323709f0a890e7d3989501c6c5>
>> >> index 440bf1a..38d07dc 100644
>> >> ---
>> >> a/tests/ovs-vsctl.at<https://urldefense.proofpoint.com/v1/url?u=http://ovs-vsctl.at&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=cdb4082265a4daea2deb33bcd848a004e2eca8323709f0a890e7d3989501c6c5>
>> >> +++
>> >> b/tests/ovs-vsctl.at<https://urldefense.proofpoint.com/v1/url?u=http://ovs-vsctl.at&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=cdb4082265a4daea2deb33bcd848a004e2eca8323709f0a890e7d3989501c6c5>
>> >> @@ -1192,6 +1192,15 @@ AT_CHECK([RUN_OVS_VSCTL(
>> >> OVS_VSCTL_CLEANUP
>> >> AT_CLEANUP
>> >>
>> >> +AT_SETUP([check interface tag change])
>> >> +OVS_VSWITCHD_START
>> >> +AT_CHECK([ovs-vsctl --columns=tag list Interface > tag1], [0], [], [])
>> >> +RESTART_OVS_VSWITCHD
>> >> +AT_CHECK([ovs-vsctl --columns=tag list Interface > tag2], [0], [], [])
>> >> +AT_CHECK([diff tag1 tag2], [1], [stdout], [])
>> >> +OVS_VSWITCHD_STOP
>> >> +AT_CLEANUP
>> >> +
>> >> dnl
>> ----------------------------------------------------------------------
>> >> AT_BANNER([ovs-vsctl add-port -- reserved port names])
>> >>
>> >> diff --git a/vswitchd/bridge.c b/vswitchd/bridge.c
>> >> index f46d002..ebbced8 100644
>> >> --- a/vswitchd/bridge.c
>> >> +++ b/vswitchd/bridge.c
>> >> @@ -379,6 +379,7 @@ bridge_init(const char *remote)
>> >> ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_cfm_remote_opstate);
>> >> ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_bfd_status);
>> >> ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_lacp_current);
>> >> + ovsdb_idl_omit_alert(idl, &ovsrec_interface_col_tag);
>> >> ovsdb_idl_omit(idl, &ovsrec_interface_col_external_ids);
>> >>
>> >> ovsdb_idl_omit_alert(idl, &ovsrec_controller_col_is_connected);
>> >> @@ -1774,6 +1775,7 @@ iface_refresh_status(struct iface *iface)
>> >> int64_t mtu_64;
>> >> uint8_t mac[ETH_ADDR_LEN];
>> >> int64_t ifindex64;
>> >> + int64_t tag64;
>> >> int error;
>> >>
>> >> if (iface_is_synthetic(iface)) {
>> >> @@ -1827,6 +1829,9 @@ iface_refresh_status(struct iface *iface)
>> >> ifindex64 = 0;
>> >> }
>> >> ovsrec_interface_set_ifindex(iface->cfg, &ifindex64, 1);
>> >> +
>> >> + tag64 = netdev_get_tag(iface->netdev);
>> >> + ovsrec_interface_set_tag(iface->cfg, tag64);
>> >> }
>> >>
>> >> /* Writes 'iface''s CFM statistics to the database. 'iface' must not be
>> >> @@ -3576,6 +3581,7 @@ iface_clear_db_record(const struct
>> ovsrec_interface
>> >> *if_cfg)
>> >> ovsrec_interface_set_lacp_current(if_cfg, NULL, 0);
>> >> ovsrec_interface_set_statistics(if_cfg, NULL, NULL, 0);
>> >> ovsrec_interface_set_ifindex(if_cfg, NULL, 0);
>> >> + ovsrec_interface_set_tag(if_cfg, 0);
>> >> }
>> >> }
>> >>
>> >> diff --git a/vswitchd/vswitch.ovsschema b/vswitchd/vswitch.ovsschema
>> >> index 3fb45d1..cedf521 100644
>> >> --- a/vswitchd/vswitch.ovsschema
>> >> +++ b/vswitchd/vswitch.ovsschema
>> >> @@ -1,6 +1,6 @@
>> >> {"name": "Open_vSwitch",
>> >> "version": "7.5.0",
>> >> - "cksum": "1448369194 20560",
>> >> + "cksum": "1929109758 20605",
>> >> "tables": {
>> >> "Open_vSwitch": {
>> >> "columns": {
>> >> @@ -172,6 +172,8 @@
>> >> "name": {
>> >> "type": "string",
>> >> "mutable": false},
>> >> + "tag": {
>> >> + "type": "integer"},
>> >> "type": {
>> >> "type": "string"},
>> >> "options": {
>> >>
>> >>
>> >> _______________________________________________
>> >> dev mailing list
>> >> dev@openvswitch.org
>> >> http://openvswitch.org/mailman/listinfo/dev<https://urldefense.proofpoint.com/v1/url?u=http://openvswitch.org/mailman/listinfo/dev&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=7b81305c05395d74875bd5fd35c2b73cf998c44423b94f9cfe2e0f8795cc33ef>
>> >>
>> >
>> > _______________________________________________
>> > dev mailing list
>> > dev@openvswitch.org
>> > http://openvswitch.org/mailman/listinfo/dev<https://urldefense.proofpoint.com/v1/url?u=http://openvswitch.org/mailman/listinfo/dev&k=oIvRg1%2BdGAgOoM1BIlLLqw%3D%3D%0A&r=TfBS78Vw3dzttvXidhbffg%3D%3D%0A&m=aM%2BfJlod3UDyqmr%2FKgRWYmoZrfD0Z6VnVaLQ%2F%2FFzvmY%3D%0A&s=7b81305c05395d74875bd5fd35c2b73cf998c44423b94f9cfe2e0f8795cc33ef>
>> >
>>
>
>
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