On 18 Oct 2022, at 15:27, Eelco Chaudron wrote:
> Add a new GDB macro called ovs_dump_cmap, which can be used to dump any
> cmap structure. Some examples:
>
> (gdb) ovs_dump_cmap &subtable->rules
> (struct cmap *) 0x3e02758
>
> (gdb) ovs_dump_cmap &subtable->rules "struct dpcls_rule" cmap_node
> (struct dpcls_rule *) 0x3e02758
>
> (gdb) ovs_dump_cmap &subtable->rules "struct dpcls_rule" cmap_node dump
> (struct dpcls_rule *) 0x3e02758 =
> {cmap_node = {next = {p = 0x0}}, mask = 0x3dfe100, flow = {hash = ...
Forgot to add my sign-off tag, I’m doing this in the reply. Let me know if it
needs a new revision instead…
Signed-off-by: Eelco Chaudron <[email protected]>
> ---
> utilities/gdb/ovs_gdb.py | 66
> ++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 66 insertions(+)
>
> diff --git a/utilities/gdb/ovs_gdb.py b/utilities/gdb/ovs_gdb.py
> index 763ece2a7..7f63dd0d5 100644
> --- a/utilities/gdb/ovs_gdb.py
> +++ b/utilities/gdb/ovs_gdb.py
> @@ -849,6 +849,71 @@ class CmdDumpOvsList(gdb.Command):
> member).dereference()))
>
>
> +#
> +# Implements the GDB "ovs_dump_cmap" command
> +#
> +class CmdDumpCmap(gdb.Command):
> + """Dump all nodes of a given cmap
> + Usage:
> + ovs_dump_cmap <struct cmap *> {[<structure>] [<member>] {dump}]}
> +
> + For example dump all the rules in a dpcls_subtable:
> +
> + (gdb) ovs_dump_cmap &subtable->rules
> + (struct cmap *) 0x3e02758
> +
> + This is not very useful, so please use this with the container_of mode:
> +
> + (gdb) ovs_dump_cmap &subtable->rules "struct dpcls_rule" cmap_node
> + (struct dpcls_rule *) 0x3e02758
> +
> + 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_cmap &subtable->rules "struct dpcls_rule" cmap_node dump
> + (struct dpcls_rule *) 0x3e02758 =
> + {cmap_node = {next = {p = 0x0}}, mask = 0x3dfe100, flow = {hash = ...
> + """
> + def __init__(self):
> + super(CmdDumpCmap, self).__init__("ovs_dump_cmap",
> + gdb.COMMAND_DATA)
> +
> + def invoke(self, arg, from_tty):
> + arg_list = gdb.string_to_argv(arg)
> + typeobj = None
> + member = None
> + dump = False
> +
> + if len(arg_list) != 1 and len(arg_list) != 3 and len(arg_list) != 4:
> + print("usage: ovs_dump_cmap <struct cmap *> "
> + "{[<structure>] [<member>] {dump}]}")
> + return
> +
> + cmap = gdb.parse_and_eval(arg_list[0]).cast(
> + gdb.lookup_type('struct cmap').pointer())
> +
> + if len(arg_list) >= 3:
> + typeobj = arg_list[1]
> + member = arg_list[2]
> + if len(arg_list) == 4 and arg_list[3] == "dump":
> + dump = True
> +
> + for node in ForEachCMAP(cmap.dereference()):
> + if typeobj is None or member is None:
> + print("(struct cmap *) {}".format(node))
> + else:
> + print("({} *) {} {}".format(
> + typeobj,
> + container_of(node,
> + gdb.lookup_type(typeobj).pointer(), member),
> + "=" if dump else ""))
> + if dump:
> + print(" {}\n".format(container_of(
> + node,
> + gdb.lookup_type(typeobj).pointer(),
> + member).dereference()))
> +
> +
> #
> # Implements the GDB "ovs_dump_simap" command
> #
> @@ -1449,6 +1514,7 @@ CmdDumpNetdevProvider()
> CmdDumpOfpacts()
> CmdDumpOvsList()
> CmdDumpPackets()
> +CmdDumpCmap()
> CmdDumpSimap()
> CmdDumpSmap()
> CmdDumpUdpifKeys()
>
> _______________________________________________
> dev mailing list
> [email protected]
> https://mail.openvswitch.org/mailman/listinfo/ovs-dev
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