user/sven/linux.git/include/linux/ipv6.h, branch v6.7.9

net: add sysctl to disable rfc4862 5.5.3e lifetime handling

2023-10-03T22:51:04Z

This change adds a sysctl to opt-out of RFC4862 section 5.5.3e's valid lifetime derivation mechanism. RFC4862 section 5.5.3e prescribes that the valid lifetime in a Router Advertisement PIO shall be ignored if it less than 2 hours and to reset the lifetime of the corresponding address to 2 hours. An in-progress 6man draft (see draft-ietf-6man-slaac-renum-07 section 4.2) is currently looking to remove this mechanism. While this draft has not been moving particularly quickly for other reasons, there is widespread consensus on section 4.2 which updates RFC4862 section 5.5.3e. Cc: Maciej Żenczykowski Cc: Lorenzo Colitti Cc: Jen Linkova Signed-off-by: Patrick Rohr Reviewed-by: Jiri Pirko Reviewed-by: David Ahern Link: https://lore.kernel.org/r/20230925214711.959704-1-prohr@google.com Signed-off-by: Jakub Kicinski

ipv6: lockless IPV6_ADDR_PREFERENCES implementation

2023-09-19T16:21:44Z

We have data-races while reading np->srcprefs Switch the field to a plain byte, add READ_ONCE() and WRITE_ONCE() annotations where needed, and IPV6_ADDR_PREFERENCES setsockopt() can now be lockless. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Link: https://lore.kernel.org/r/20230918142321.1794107-1-edumazet@google.com Signed-off-by: Paolo Abeni

ipv6: lockless IPV6_FLOWINFO_SEND implementation

2023-09-15T09:33:48Z

np->sndflow reads are racy. Use one bit ftom atomic inet->inet_flags instead, IPV6_FLOWINFO_SEND setsockopt() can be lockless. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: lockless IPV6_MTU_DISCOVER implementation

2023-09-15T09:33:48Z

Most np->pmtudisc reads are racy. Move this 3bit field on a full byte, add annotations and make IPV6_MTU_DISCOVER setsockopt() lockless. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: lockless IPV6_ROUTER_ALERT_ISOLATE implementation

2023-09-15T09:33:48Z

Reads from np->rtalert_isolate are racy. Move this flag to inet->inet_flags to fix data-races. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: move np->repflow to atomic flags

2023-09-15T09:33:48Z

Move np->repflow to inet->inet_flags to fix data-races. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: lockless IPV6_RECVERR implemetation

2023-09-15T09:33:48Z

np->recverr is moved to inet->inet_flags to fix data-races. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: lockless IPV6_DONTFRAG implementation

2023-09-15T09:33:47Z

Move np->dontfrag flag to inet->inet_flags to fix data-races. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: lockless IPV6_AUTOFLOWLABEL implementation

2023-09-15T09:33:47Z

Move np->autoflowlabel and np->autoflowlabel_set in inet->inet_flags, to fix data-races. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: lockless IPV6_MULTICAST_ALL implementation

2023-09-15T09:33:47Z

Move np->mc_all to an atomic flags to fix data-races. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller