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[net-next,v3,0/2] Flexible array for ip tunnel options

Message ID 20250217202503.265318-1-gal@nvidia.com (mailing list archive)
Headers show
Series Flexible array for ip tunnel options | expand

Message

Gal Pressman Feb. 17, 2025, 8:25 p.m. UTC 
Remove the hidden assumption that options are allocated at the end of
the struct, and teach the compiler about them using a flexible array.

First patch is converting hard-coded 'info + 1' to use ip_tunnel_info()
helper.
Second patch adds the 'options' flexible array and changes the helper to
use it.

Changelog -
v2->v3: https://lore.kernel.org/netdev/20250212140953.107533-1-gal@nvidia.com/
* Add a precursory patch to convert hard-coded user of options.
* Keep ip_tunnel_info() macro (Alexander).
* Use __aligned_largest (Alexander).

v1->v2: https://lore.kernel.org/netdev/20250209101853.15828-1-gal@nvidia.com/
* Remove change in struct layout, align 'options' field explicitly (Ilya, Kees, Jakub).
* Change allocation I missed in v1 in metadata_dst_alloc_percpu().

Thanks,
Gal

Gal Pressman (2):
  ip_tunnel: Use ip_tunnel_info() helper instead of 'info + 1'
  net: Add options as a flexible array to struct ip_tunnel_info

 include/net/dst_metadata.h | 7 ++-----
 include/net/ip_tunnels.h   | 7 ++++---
 net/core/dst.c             | 6 ++++--
 net/sched/act_tunnel_key.c | 8 +++++---
 4 files changed, 15 insertions(+), 13 deletions(-)