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Author SHA1 Message Date
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