[PATCH dpdk 0/4] net/tap: add network namespace support

[Robin Jarry <rjarry@redhat.com>]

The TAP driver currently uses ioctl operations which are name-based and
namespace-unaware. When an interface is moved to another namespace, the
driver loses control and cannot track the device.

This series migrates to netlink-based interface control using ifindex
instead of names, making operations namespace-safe. When an interface
moves to another namespace, the driver detects RTM_DELLINK, queries the
new namespace using TUNGETDEVNETNS, and recreates netlink sockets in
that namespace to maintain control.

The implementation falls back to ioctl when netlink is unavailable,
preserving compatibility with older kernels.

Tested by moving TAP interfaces between namespaces while running
testpmd. All link operations continue to work transparently after
namespace changes.

Robin Jarry (4):
  net/tap: add netlink helpers
  net/tap: rename internal ioctl wrapper
  net/tap: use netlink if possible
  net/tap: detect namespace change

 drivers/net/tap/rte_eth_tap.c | 316 ++++++++++++++++++++++++++++------
 drivers/net/tap/rte_eth_tap.h |   2 +-
 drivers/net/tap/tap_netlink.c | 291 +++++++++++++++++++++++++++++++
 drivers/net/tap/tap_netlink.h |  10 +-
 4 files changed, 565 insertions(+), 54 deletions(-)

-- 
2.51.0