kernel/linux.git/net/ipv6/exthdrs.c, branch linux-6.9.y

net: ipv6: exthdrs: get rid of ipv6_skb_net()

2024-03-11T22:15:08+00:00

Get rid of ipv6_skb_net() which is only used in ipv6_hop_ioam(). Signed-off-by: Justin Iurman Link: https://lore.kernel.org/r/20240308185343.39272-1-justin.iurman@uliege.be Signed-off-by: Jakub Kicinski

net: adopt skb_network_offset() and similar helpers

2024-03-04T08:47:06+00:00

This is a cleanup patch, making code a bit more concise. 1) Use skb_network_offset(skb) in place of (skb_network_header(skb) - skb->data) 2) Use -skb_network_offset(skb) in place of (skb->data - skb_network_header(skb)) 3) Use skb_transport_offset(skb) in place of (skb_transport_header(skb) - skb->data) 4) Use skb_inner_transport_offset(skb) in place of (skb_inner_transport_header(skb) - skb->data) Signed-off-by: Eric Dumazet Acked-by: Edward Cree # for sfc Signed-off-by: David S. Miller

ipv6/addrconf: annotate data-races around devconf fields (II)

2024-03-01T08:42:33+00:00

Final (?) round of this series. Annotate lockless reads on following devconf fields, because they be changed concurrently from /proc/net/ipv6/conf. - accept_dad - optimistic_dad - use_optimistic - use_oif_addrs_only - ra_honor_pio_life - keep_addr_on_down - ndisc_notify - ndisc_evict_nocarrier - suppress_frag_ndisc - addr_gen_mode - seg6_enabled - ioam6_enabled - ioam6_id - ioam6_id_wide - drop_unicast_in_l2_multicast - mldv[12]_unsolicited_report_interval - force_mld_version - force_tllao - accept_untracked_na - drop_unsolicited_na - accept_source_route Signed-off-by: Eric Dumazet Reviewed-by: Jiri Pirko Signed-off-by: David S. Miller

net: exthdrs: ioam6: send trace event

2024-02-28T11:19:41+00:00

If we're processing an IOAM Pre-allocated Trace Option-Type (the only one supported currently), then send the trace as an ioam6 event to the netlink multicast group. This way, user space apps will be able to collect IOAM data. Reviewed-by: David Ahern Signed-off-by: Justin Iurman Signed-off-by: David S. Miller

Fix write to cloned skb in ipv6_hop_ioam()

2024-02-22T08:28:03+00:00

ioam6_fill_trace_data() writes inside the skb payload without ensuring it's writeable (e.g., not cloned). This function is called both from the input and output path. The output path (ioam6_iptunnel) already does the check. This commit provides a fix for the input path, inside ipv6_hop_ioam(). It also updates ip6_parse_tlv() to refresh the network header pointer ("nh") when returning from ipv6_hop_ioam(). Fixes: 9ee11f0fff20 ("ipv6: ioam: Data plane support for Pre-allocated Trace") Reported-by: Paolo Abeni Signed-off-by: Justin Iurman Signed-off-by: Paolo Abeni

ipv6: exthdrs: Replace opencoded swap() implementation

2023-08-08T22:36:47+00:00

Get a coccinelle warning as follows: net/ipv6/exthdrs.c:800:29-30: WARNING opportunity for swap() Use swap() to replace opencoded implementation. Signed-off-by: Ziyang Xuan Reviewed-by: Pavan Chebbi Reviewed-by: Kuniyuki Iwashima Link: https://lore.kernel.org/r/20230807020947.1991716-1-william.xuanziyang@huawei.com Signed-off-by: Jakub Kicinski

ipv6: rpl: Remove redundant skb_dst_drop().

2023-07-13T00:12:29+00:00

RPL code has a pattern where skb_dst_drop() is called before ip6_route_input(). However, ip6_route_input() calls skb_dst_drop() internally, so we need not call skb_dst_drop() before ip6_route_input(). Signed-off-by: Kuniyuki Iwashima Reviewed-by: Simon Horman Reviewed-by: David Ahern Link: https://lore.kernel.org/r/20230710213511.5364-1-kuniyu@amazon.com Signed-off-by: Jakub Kicinski

ipv6: exthdrs: Remove redundant skb_headlen() check in ip6_parse_tlv().

2023-06-19T18:32:58+00:00

ipv6_destopt_rcv() and ipv6_parse_hopopts() pulls these data - Hop-by-Hop/Destination Options Header : 8 - Hdr Ext Len : skb_transport_header(skb)[1] << 3 and calls ip6_parse_tlv(), so it need not check if skb_headlen() is less than skb_transport_offset(skb) + (skb_transport_header(skb)[1] << 3). Signed-off-by: Kuniyuki Iwashima Signed-off-by: Jakub Kicinski

ipv6: exthdrs: Reload hdr only when needed in ipv6_srh_rcv().

2023-06-19T18:32:58+00:00

We need not reload hdr in ipv6_srh_rcv() unless we call pskb_expand_head(). Signed-off-by: Kuniyuki Iwashima Signed-off-by: Jakub Kicinski

ipv6: exthdrs: Replace pskb_pull() with skb_pull() in ipv6_srh_rcv().

2023-06-19T18:32:58+00:00

ipv6_rthdr_rcv() pulls these data - Segment Routing Header : 8 - Hdr Ext Len : skb_transport_header(skb)[1] << 3 needed by ipv6_srh_rcv(), so pskb_pull() in ipv6_srh_rcv() never fails and can be replaced with skb_pull(). Signed-off-by: Kuniyuki Iwashima Signed-off-by: Jakub Kicinski