Introduce a new function, rtnl_ack_extack, to allow commands to flip to the new error reporting over time. Convert iplink_modify to use the new function to display error strings returned from ip link set commands. David Ahern (3): netlink: import netlink message parsing from kernel netlink: Add support for extended ack to rtnl_talk ip link: Add extack handling for setlink include/libnetlink.h | 14 +++++ include/nlattr.h | 162 +++++++++++++++++++++++++++++++++++++++++++++++++++ ip/iplink.c | 18 +++++- lib/Makefile | 2 +- lib/libnetlink.c | 96 ++++++++++++++++++++++++++---- lib/nlattr.c | 145 +++++++++++++++++++++++++++++++++++++++++++++ 6 files changed, 423 insertions(+), 14 deletions(-) create mode 100644 include/nlattr.h create mode 100644 lib/nlattr.c -- 2.1.4