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5 Commits

Author SHA1 Message Date
Eelco Chaudron
ef557e2c55 utilities: Add the ovs_show_fdb command to gdb 
This adds the ovs_show_fdb command:

  Usage: ovs_show_fdb {<bridge_name> {dbg} {hash}}

  <bridge_name> : Optional bridge name, if not supplied FDB summary
                  information is displayed for all bridges.
  dbg           : Will show structure address information
  hash          : Will display the forwarding table using the hash
                  table, rather than the rlu list.

Some examples:

  (gdb) ovs_show_fdb
  br0        : (struct mac_learning *) 0x139c160
      table.n         : 0
      secret          : 0x6c42c707
      idle_time       : 300
      max_entries     : 2048
      ref_count       : 2
      need_revalidate : false
      ports_by_ptr.n  : 0
      ports_by_usage.n: 0
  br1        : (struct mac_learning *) 0x139b0b0
      table.n         : 0
      secret          : 0xcf8efaf8
      idle_time       : 300
      max_entries     : 2048
      ref_count       : 2
      need_revalidate : false
      ports_by_ptr.n  : 0
      ports_by_usage.n: 0
  ovs_pvp_br0: (struct mac_learning *) 0x137b470
      table.n         : 4
      secret          : 0x623e75ad
      idle_time       : 300
      max_entries     : 2048
      ref_count       : 2
      need_revalidate : false
      ports_by_ptr.n  : 4
      ports_by_usage.n: 4

  (gdb) ovs_show_fdb  ovs_pvp_br0
  table.n         : 4
  secret          : 0x623e75ad
  idle_time       : 300
  max_entries     : 2048
  ref_count       : 2
  need_revalidate : false
  ports_by_ptr.n  : 4
  ports_by_usage.n: 4

  FDB "lrus" table:
  port               VLAN  MAC                Age out @
  -----------------  ----  -----------------  ---------
  02[vnet2]             0  52:54:00:b6:de:1e      81501
  01[vnet0]             0  52:54:00:0b:60:6e      81501
  03[vnet4]             0  52:54:00:89:32:4c      81501
  0LOCAL[ovs_pvp_br     0  5e:26:7b:41:28:46      81501

  Total MAC entries: 4

  Current time is between 81198 and 81203 seconds.

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
 2018-06-20 10:20:06 -07:00
Eelco Chaudron
425620614f Utilities: Add the simap and netdev_provider dump commands to gdb 
This changes add two additional gdb commands:

- ovs_dump_netdev_provider
- ovs_dump_ovs_list <struct simap *>

Here are some examples of their output:

ovs_dump_netdev_provider:
=========================

  (gdb) ovs_dump_netdev_provider
  (struct netdev_registered_class *) 0x2b2c540: refcnt = {count = 3},
      (struct netdev_class *) 0x9555c0 = {type = tap, is_pmd = false, ...},
  (struct netdev_registered_class *) 0x2b2c5a0: refcnt = {count = 2},
      (struct netdev_class *) 0xc439d8 = {type = vxlan, is_pmd = false, ...},
      (struct vport_class *) 0xc439d0 = { dpif_port = vxlan_sys, ... }
  (struct netdev_registered_class *) 0x2b2c960: refcnt = {count = 1},
      (struct netdev_class *) 0xc442f8 = {type = ip6erspan, is_pmd = false, ...},
      (struct vport_class *) 0xc442f0 = { dpif_port = ip6erspan_sys, ... }
  (struct netdev_registered_class *) 0x2b2c980: refcnt = {count = 1},
      (struct netdev_class *) 0xc44540 = {type = ip6gre, is_pmd = false, ...},
      (struct vport_class *) 0xc44538 = { dpif_port = ip6gre_sys, ... }
  (struct netdev_registered_class *) 0x2b2ebe0: refcnt = {count = 3},
      (struct netdev_class *) 0x95b8c0 = {type = dpdk, is_pmd = true, ...},

ovs_dump_ovs_list:
==================

  (gdb) b memory_report
  Breakpoint 1 at 0x753190: file lib/memory.c, line 136.
  (gdb) set want_report=1
  (gdb) c
  Continuing.

  Breakpoint 1, memory_report (usage=usage@entry=0x7fff0683d920) at lib/memory.c:136
  136	{
  (gdb) p usage
  $20 = (const struct simap *) 0x7fff0683d920
  (gdb) p* usage
  $21 = {map = {buckets = 0x2b64df0, one = 0x0, mask = 3, n = 4}}
  (gdb) p *usage
  (gdb) ovs_dump_simap usage
  handlers    : 40 / 0x28
  ports       : 6 / 0x6
  revalidators: 16 / 0x10
  rules       : 10 / 0xa

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
 2018-06-15 11:47:24 -07:00
Eelco Chaudron
b9683ff014 Utilities: Add the ovs_dump_dp_provider command to the gdb script 
This change adds the ovs_dump_dp_provider command, which allows
dumping of all the registered registered_dpif_class structures.

In addition it has some small internal cleanups.

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
 2018-06-15 11:46:41 -07:00
Eelco Chaudron
5d0a62672d utilities: Add gdb debug commands to dump lists and pmd info 
Adds back-end support for walking ovs cmaps, and the following
commands to the gdb script:

- Dump all poll_thread info added to a specific struct dp_netdev*.
  Usage: ovs_dump_dp_netdev_poll_threads <struct dp_netdev *>

- Dump all nodes of an ovs_list:
    Usage: ovs_dump_ovs_list <struct ovs_list *> {[<structure>] [<member>] {dump}]}

    For example dump all the none quiescent OvS RCU threads:

      (gdb) ovs_dump_ovs_list &ovsrcu_threads
      (struct ovs_list *) 0x7f2a14000900
      (struct ovs_list *) 0x7f2acc000900
      (struct ovs_list *) 0x7f2a680668d0

    This is not very useful, so please use this with the container_of mode:

      (gdb) ovs_dump_ovs_list &ovsrcu_threads 'struct ovsrcu_perthread' list_node
      (struct ovsrcu_perthread *) 0x7f2a14000900
      (struct ovsrcu_perthread *) 0x7f2acc000900
      (struct ovsrcu_perthread *) 0x7f2a680668d0

    Now you can manually use the print command to show the content, or use the
    dump option to dump the structure for all nodes:

      (gdb) ovs_dump_ovs_list &ovsrcu_threads 'struct ovsrcu_perthread' list_node dump
      (struct ovsrcu_perthread *) 0x7f2a14000900 =
        {list_node = {prev = 0xf48e80 <ovsrcu_threads>, next = 0x7f2acc000900}, mutex...

      (struct ovsrcu_perthread *) 0x7f2acc000900 =
        {list_node = {prev = 0x7f2a14000900, next = 0x7f2a680668d0}, mutex ...

      (struct ovsrcu_perthread *) 0x7f2a680668d0 =
        {list_node = {prev = 0x7f2acc000900, next = 0xf48e80 <ovsrcu_threads>}, ...

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
 2018-05-16 15:42:51 -07:00
Eelco Chaudron
0a3348d1a9 utilities: Add some GDB macros for ovs-vswitchd 
This commit adds basic GDB macro's for ovs-vswitchd:
  - ovs_dump_bridge [ports|wanted]
  - ovs_dump_bridge_ports <struct bridge *>
  - ovs_dump_dp_netdev [ports]
  - ovs_dump_dp_netdev_ports <struct dp_netdev *>
  - ovs_dump_netdev

These dump functions show limited info, but you can simply cut/paste
the address and get the full structure info. For example:

(gdb) ovs_dump_netdev
(struct netdev *) 0x555771ed89e0: name = ovs-netdev     , auto_classified = false, netdev_class = 0x5557714413c0 <netdev_tap_class>
(struct netdev *) 0x555771fc62a0: name = ovs_pvp_br0    , auto_classified = false, netdev_class = 0x5557714413c0 <netdev_tap_class>
(struct netdev *) 0x555771fc9660: name = vnet0          , auto_classified = true , netdev_class = 0x555771445e00 <netdev_linux_class>
(struct netdev *) 0x555771fc78d0: name = virbr0         , auto_classified = true , netdev_class = 0x555771445e00 <netdev_linux_class>
(struct netdev *) 0x7fbefffb5540: name = dpdk0          , auto_classified = false, netdev_class = 0x5557714419e0 <dpdk_class>
(struct netdev *) 0x555771fc98b0: name = em3            , auto_classified = true , netdev_class = 0x555771445e00 <netdev_linux_class>
(struct netdev *) 0x7fbea0a31c40: name = vhost0         , auto_classified = false, netdev_class = 0x555771442040 <dpdk_vhost_client_class>

(gdb) p *((struct netdev *) 0x7fbefffb5540)
$1 = {name = 0x555771ecef70 "dpdk0", netdev_class = 0x5557714419e0 <dpdk_class>, auto_classified = false, mtu_user_config = true, ref_cnt = 2, change_seq = 12,
  reconfigure_seq = 0x555771ecf2e0, last_reconfigure_seq = 110, n_txq = 2, n_rxq = 1, node = 0x555771efafe0, saved_flags_list = {prev = 0x7fbefffb5580, next = 0x7fbefffb5580}}

Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
 2018-05-09 13:14:34 -07:00