kernel/linux.git/net/ipv6/ping.c, branch v6.19.11

net: Convert proto callbacks from sockaddr to sockaddr_unsized

2025-11-05T03:10:33+00:00

Convert struct proto pre_connect(), connect(), bind(), and bind_add() callback function prototypes from struct sockaddr to struct sockaddr_unsized. This does not change per-implementation use of sockaddr for passing around an arbitrarily sized sockaddr struct. Those will be addressed in future patches. Additionally removes the no longer referenced struct sockaddr from include/net/inet_common.h. No binary changes expected. Signed-off-by: Kees Cook Link: https://patch.msgid.link/20251104002617.2752303-5-kees@kernel.org Signed-off-by: Jakub Kicinski

inet: ping: remove ping_hash()

2025-09-01T20:15:14+00:00

There is no point in keeping ping_hash(). Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Reviewed-by: Yue Haibing Link: https://patch.msgid.link/20250829153054.474201-3-edumazet@google.com Signed-off-by: Jakub Kicinski

net: annotate races around sk->sk_uid

2025-06-24T00:04:03+00:00

sk->sk_uid can be read while another thread changes its value in sockfs_setattr(). Add sk_uid(const struct sock *sk) helper to factorize the needed READ_ONCE() annotations, and add corresponding WRITE_ONCE() where needed. Fixes: 86741ec25462 ("net: core: Add a UID field to struct sock.") Signed-off-by: Eric Dumazet Cc: Lorenzo Colitti Reviewed-by: Maciej Żenczykowski Link: https://patch.msgid.link/20250620133001.4090592-2-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

sock: support SO_PRIORITY cmsg

2024-12-17T02:13:44+00:00

The Linux socket API currently allows setting SO_PRIORITY at the socket level, applying a uniform priority to all packets sent through that socket. The exception to this is IP_TOS, when the priority value is calculated during the handling of ancillary data, as implemented in commit f02db315b8d8 ("ipv4: IP_TOS and IP_TTL can be specified as ancillary data"). However, this is a computed value, and there is currently no mechanism to set a custom priority via control messages prior to this patch. According to this patch, if SO_PRIORITY is specified as ancillary data, the packet is sent with the priority value set through sockc->priority, overriding the socket-level values set via the traditional setsockopt() method. This is analogous to the existing support for SO_MARK, as implemented in commit c6af0c227a22 ("ip: support SO_MARK cmsg"). If both cmsg SO_PRIORITY and IP_TOS are passed, then the one that takes precedence is the last one in the cmsg list. This patch has the side effect that raw_send_hdrinc now interprets cmsg IP_TOS. Reviewed-by: Willem de Bruijn Suggested-by: Ferenc Fejes Signed-off-by: Anna Emese Nyiri Link: https://patch.msgid.link/20241213084457.45120-3-annaemesenyiri@gmail.com Signed-off-by: Jakub Kicinski

ipv6: introduce dst_rt6_info() helper

2024-04-29T12:32:01+00:00

Instead of (struct rt6_info *)dst casts, we can use : #define dst_rt6_info(_ptr) \ container_of_const(_ptr, struct rt6_info, dst) Some places needed missing const qualifiers : ip6_confirm_neigh(), ipv6_anycast_destination(), ipv6_unicast_destination(), has_gateway() v2: added missing parts (David Ahern) Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: annotate data-races around np->ucast_oif

2023-12-11T10:59:17+00:00

np->ucast_oif is read locklessly in some contexts. Make all accesses to this field lockless, adding appropriate annotations. This also makes setsockopt( IPV6_UNICAST_IF ) lockless. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

ipv6: annotate data-races around np->mcast_oif

2023-12-11T10:59:17+00:00

np->mcast_oif is read locklessly in some contexts. Make all accesses to this field lockless, adding appropriate annotations. This also makes setsockopt( IPV6_MULTICAST_IF ) lockless. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

bpf: Propagate modified uaddrlen from cgroup sockaddr programs

2023-10-11T22:03:40+00:00

As prep for adding unix socket support to the cgroup sockaddr hooks, let's propagate the sockaddr length back to the caller after running a bpf cgroup sockaddr hook program. While not important for AF_INET or AF_INET6, the sockaddr length is important when working with AF_UNIX sockaddrs as the size of the sockaddr cannot be determined just from the address family or the sockaddr's contents. __cgroup_bpf_run_filter_sock_addr() is modified to take the uaddrlen as an input/output argument. After running the program, the modified sockaddr length is stored in the uaddrlen pointer. Signed-off-by: Daan De Meyer Link: https://lore.kernel.org/r/20231011185113.140426-3-daan.j.demeyer@gmail.com Signed-off-by: Martin KaFai Lau

ipv6: lockless IPV6_FLOWINFO_SEND implementation

2023-09-15T09:33:48+00:00

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