kernel/linux.git/include/net/ipv6.h, branch v6.18.21

ipv6: annotate data-races in ip6_multipath_hash_{policy,fields}()

2026-03-04T12:20:16+00:00

[ Upstream commit 03e9d91dd64e2f5ea632df5d59568d91757efc4d ] Add missing READ_ONCE() when reading sysctl values. Signed-off-by: Eric Dumazet Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260115094141.3124990-5-edumazet@google.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

ipv6: fix a race in ip6_sock_set_v6only()

2026-02-26T22:59:39+00:00

[ Upstream commit 452a3eee22c57a5786ae6db5c97f3b0ec13bb3b7 ] It is unlikely that this function will be ever called with isk->inet_num being not zero. Perform the check on isk->inet_num inside the locked section for complete safety. Fixes: 9b115749acb24 ("ipv6: add ip6_sock_set_v6only") Signed-off-by: Eric Dumazet Reviewed-by: Simon Horman Reviewed-by: Fernando Fernandez Mancera Link: https://patch.msgid.link/20260216102202.3343588-1-edumazet@google.com Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin

ipv6: fix _DEVADD() and _DEVUPD() macros

2025-03-25T14:31:24+00:00

ip6_rcv_core() is using: __IP6_ADD_STATS(net, idev, IPSTATS_MIB_NOECTPKTS + (ipv6_get_dsfield(hdr) & INET_ECN_MASK), max_t(unsigned short, 1, skb_shinfo(skb)->gso_segs)); This is currently evaluating both expressions twice. Fix _DEVADD() and _DEVUPD() macros to evaluate their arguments once. Signed-off-by: Eric Dumazet Reviewed-by: Simon Horman Link: https://patch.msgid.link/20250319212516.2385451-1-edumazet@google.com Signed-off-by: Jakub Kicinski

ipv6: initialize inet socket cookies with sockcm_init

2025-02-19T02:27:20+00:00

Avoid open coding the same logic. Signed-off-by: Willem de Bruijn Reviewed-by: David Ahern Link: https://patch.msgid.link/20250214222720.3205500-8-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski

ipv6: replace ipcm6_init calls with ipcm6_init_sk

2025-02-19T02:27:20+00:00

This initializes tclass and dontfrag before cmsg parsing, removing the need for explicit checks against -1 in each caller. Leave hlimit set to -1, because its full initialization (in ip6_sk_dst_hoplimit) requires more state (dst, flowi6, ..). This also prepares for calling sockcm_init in a follow-on patch. Signed-off-by: Willem de Bruijn Reviewed-by: David Ahern Link: https://patch.msgid.link/20250214222720.3205500-7-willemdebruijn.kernel@gmail.com Signed-off-by: Jakub Kicinski

net: reformat kdoc return statements

2024-12-09T22:44:59+00:00

kernel-doc -Wall warns about missing Return: statement for non-void functions. We have a number of kdocs in our headers which are missing the colon, IOW they use * Return some value or * Returns some value Having the colon makes some sense, it should help kdoc parser avoid false positives. So add them. This is mostly done with a sed script, and removing the unnecessary cases (mostly the comments which aren't kdoc). Acked-by: Johannes Berg Acked-by: Richard Cochran Acked-by: Sergey Ryazanov Reviewed-by: Edward Cree Acked-by: Alexandra Winter Acked-by: Pablo Neira Ayuso Link: https://patch.msgid.link/20241205165914.1071102-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

ipv6: Correct spelling in ipv6.h

2024-08-26T16:37:22+00:00

Correct spelling in ip_tunnels.h As reported by codespell. Cc: David Ahern Signed-off-by: Simon Horman Link: https://patch.msgid.link/20240822-net-spell-v1-4-3a98971ce2d2@kernel.org Signed-off-by: Jakub Kicinski

ipv6: Add ipv6_addr_{cpu_to_be32,be32_to_cpu} helpers

2024-08-16T17:27:48+00:00

Add helpers to convert an ipv6 addr, expressed as an array of words, from CPU to big-endian byte order, and vice versa. No functional change intended. Compile tested only. Suggested-by: Andrew Lunn Link: https://lore.kernel.org/netdev/c7684349-535c-45a4-9a74-d47479a50020@lunn.ch/ Reviewed-by: Andrew Lunn Signed-off-by: Simon Horman Link: https://patch.msgid.link/20240813-ipv6_addr-helpers-v2-1-5c974f8cca3e@kernel.org Signed-off-by: Jakub Kicinski

ipv6: annotate data-races around cnf.forwarding

2024-03-01T08:42:31+00:00

idev->cnf.forwarding and net->ipv6.devconf_all->forwarding might be read locklessly, add appropriate READ_ONCE() and WRITE_ONCE() annotations. Signed-off-by: Eric Dumazet Reviewed-by: Jiri Pirko Signed-off-by: David S. Miller

tcp: Save v4 address as v4-mapped-v6 in inet_bind2_bucket.v6_rcv_saddr.

2023-12-22T22:15:34+00:00

In bhash2, IPv4/IPv6 addresses are saved in two union members, which complicate address checks in inet_bind2_bucket_addr_match() and inet_bind2_bucket_match_addr_any() considering uninitialised memory and v4-mapped-v6 conflicts. Let's simplify that by saving IPv4 address as v4-mapped-v6 address and defining tb2.rcv_saddr as tb2.v6_rcv_saddr.s6_addr32[3]. Then, we can compare v6 address as is, and after checking v4-mapped-v6, we can compare v4 address easily. Also, we can remove tb2->family. Note these functions will be further refactored in the next patch. Signed-off-by: Kuniyuki Iwashima Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller