linux_dsm_epyc7002/net/8021q
Michal Kubecek ae0be8de9a netlink: make nla_nest_start() add NLA_F_NESTED flag
Even if the NLA_F_NESTED flag was introduced more than 11 years ago, most
netlink based interfaces (including recently added ones) are still not
setting it in kernel generated messages. Without the flag, message parsers
not aware of attribute semantics (e.g. wireshark dissector or libmnl's
mnl_nlmsg_fprintf()) cannot recognize nested attributes and won't display
the structure of their contents.

Unfortunately we cannot just add the flag everywhere as there may be
userspace applications which check nlattr::nla_type directly rather than
through a helper masking out the flags. Therefore the patch renames
nla_nest_start() to nla_nest_start_noflag() and introduces nla_nest_start()
as a wrapper adding NLA_F_NESTED. The calls which add NLA_F_NESTED manually
are rewritten to use nla_nest_start().

Except for changes in include/net/netlink.h, the patch was generated using
this semantic patch:

@@ expression E1, E2; @@
-nla_nest_start(E1, E2)
+nla_nest_start_noflag(E1, E2)

@@ expression E1, E2; @@
-nla_nest_start_noflag(E1, E2 | NLA_F_NESTED)
+nla_nest_start(E1, E2)

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-27 17:03:44 -04:00
..
Kconfig 8021q: update description 2014-01-21 17:01:25 -08:00
Makefile net: remove blank lines at end of file 2018-07-24 14:10:43 -07:00
vlan_core.c net: 8021q: move vlan offload registrations into vlan_core 2018-11-16 19:51:08 -08:00
vlan_dev.c vlan: do not transfer link state in vlan bridge binding mode 2019-04-19 13:58:17 -07:00
vlan_gvrp.c net: vlan: prepare for 802.1ad support 2013-04-19 14:45:27 -04:00
vlan_mvrp.c net: vlan: prepare for 802.1ad support 2013-04-19 14:45:27 -04:00
vlan_netlink.c netlink: make nla_nest_start() add NLA_F_NESTED flag 2019-04-27 17:03:44 -04:00
vlan.c vlan: do not transfer link state in vlan bridge binding mode 2019-04-19 13:58:17 -07:00
vlan.h net: vlan: add support for tunnel offload 2018-11-07 22:23:30 -08:00
vlanproc.c proc: introduce proc_create_net{,_data} 2018-05-16 07:24:30 +02:00
vlanproc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00