kernel/linux.git/net/sctp/protocol.c, branch v6.12.80

sctp: Unmask upper DSCP bits in sctp_v4_get_dst()

2024-09-09T13:14:53+00:00

Unmask the upper DSCP bits when calling ip_route_output_key() so that in the future it could perform the FIB lookup according to the full DSCP value. Note that the 'tos' variable holds the full DS field. Signed-off-by: Ido Schimmel Reviewed-by: Guillaume Nault Reviewed-by: Xin Long Signed-off-by: David S. Miller

inet: introduce dst_rtable() helper

2024-05-01T01:32:38+00:00

I added dst_rt6_info() in commit e8dfd42c17fa ("ipv6: introduce dst_rt6_info() helper") This patch does a similar change for IPv4. Instead of (struct rtable *)dst casts, we can use : #define dst_rtable(_ptr) \ container_of_const(_ptr, struct rtable, dst) Patch is smaller than IPv6 one, because IPv4 has skb_rtable() helper. Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Reviewed-by: Sabrina Dubroca Link: https://lore.kernel.org/r/20240429133009.1227754-1-edumazet@google.com Signed-off-by: Jakub Kicinski

sctp: Simplify the allocation of slab caches

2024-02-02T12:17:32+00:00

commit 0a31bd5f2bbb ("KMEM_CACHE(): simplify slab cache creation") introduces a new macro. Use the new KMEM_CACHE() macro instead of direct kmem_cache_create to simplify the creation of SLAB caches. Signed-off-by: Kunwu Chan Reviewed-by: Jiri Pirko Acked-by: Xin Long Signed-off-by: David S. Miller

inet: implement lockless IP_TOS

2023-10-01T18:39:18+00:00

Some reads of inet->tos are racy. Add needed READ_ONCE() annotations and convert IP_TOS option lockless. v2: missing changes in include/net/route.h (David Ahern) Signed-off-by: Eric Dumazet Reviewed-by: David Ahern Signed-off-by: David S. Miller

inet: move inet->freebind to inet->inet_flags

2023-08-16T10:09:17+00:00

IP_FREEBIND socket option can now be set/read without locking the socket. Signed-off-by: Eric Dumazet Acked-by: Soheil Hassas Yeganeh Reviewed-by: Simon Horman Reviewed-by: Matthieu Baerts Signed-off-by: David S. Miller

sctp: Set TOS and routing scope independently for fib lookups.

2023-07-19T11:32:07+00:00

There's no reason for setting the RTO_ONLINK flag in ->flowi4_tos as RT_CONN_FLAGS() does. We can easily set ->flowi4_scope properly instead. This makes the code more explicit and will allow to convert ->flowi4_tos to dscp_t in the future. Signed-off-by: Guillaume Nault Reviewed-by: Xin Long Signed-off-by: David S. Miller

sock: Remove ->sendpage*() in favour of sendmsg(MSG_SPLICE_PAGES)

2023-06-24T22:50:13+00:00

Remove ->sendpage() and ->sendpage_locked(). sendmsg() with MSG_SPLICE_PAGES should be used instead. This allows multiple pages and multipage folios to be passed through. Signed-off-by: David Howells Acked-by: Marc Kleine-Budde # for net/can cc: Jens Axboe cc: Matthew Wilcox cc: linux-afs@lists.infradead.org cc: mptcp@lists.linux.dev cc: rds-devel@oss.oracle.com cc: tipc-discussion@lists.sourceforge.net cc: virtualization@lists.linux-foundation.org Link: https://lore.kernel.org/r/20230623225513.2732256-16-dhowells@redhat.com Signed-off-by: Jakub Kicinski

ipv4: Drop tos parameter from flowi4_update_output()

2023-06-02T09:52:38+00:00

Callers of flowi4_update_output() never try to update ->flowi4_tos: * ip_route_connect() updates ->flowi4_tos with its own current value. * ip_route_newports() has two users: tcp_v4_connect() and dccp_v4_connect. Both initialise fl4 with ip_route_connect(), which in turn sets ->flowi4_tos with RT_TOS(inet_sk(sk)->tos) and ->flowi4_scope based on SOCK_LOCALROUTE. Then ip_route_newports() updates ->flowi4_tos with RT_CONN_FLAGS(sk), which is the same as RT_TOS(inet_sk(sk)->tos), unless SOCK_LOCALROUTE is set on the socket. In that case, the lowest order bit is set to 1, to eventually inform ip_route_output_key_hash() to restrict the scope to RT_SCOPE_LINK. This is equivalent to properly setting ->flowi4_scope as ip_route_connect() did. * ip_vs_xmit.c initialises ->flowi4_tos with memset(0), then calls flowi4_update_output() with tos=0. * sctp_v4_get_dst() uses the same RT_CONN_FLAGS_TOS() when initialising ->flowi4_tos and when calling flowi4_update_output(). In the end, ->flowi4_tos never changes. So let's just drop the tos parameter. This will simplify the conversion of ->flowi4_tos from __u8 to dscp_t. Signed-off-by: Guillaume Nault Signed-off-by: David S. Miller

net: no longer support SOCK_REFCNT_DEBUG feature

2023-02-15T10:25:21+00:00

Commit e48c414ee61f ("[INET]: Generalise the TCP sock ID lookup routines") commented out the definition of SOCK_REFCNT_DEBUG in 2005 and later another commit 463c84b97f24 ("[NET]: Introduce inet_connection_sock") removed it. Since we could track all of them through bpf and kprobe related tools and the feature could print loads of information which might not be that helpful even under a little bit pressure, the whole feature which has been inactive for many years is no longer supported. Link: https://lore.kernel.org/lkml/20230211065153.54116-1-kerneljasonxing@gmail.com/ Suggested-by: Kuniyuki Iwashima Signed-off-by: Jason Xing Reviewed-by: Kuniyuki Iwashima Acked-by: Wenjia Zhang Reviewed-by: Eric Dumazet Acked-by: Matthieu Baerts Signed-off-by: David S. Miller

sctp: add dif and sdif check in asoc and ep lookup

2022-11-18T11:42:54+00:00

This patch at first adds a pernet global l3mdev_accept to decide if it accepts the packets from a l3mdev when a SCTP socket doesn't bind to any interface. It's set to 1 to avoid any possible incompatible issue, and in next patch, a sysctl will be introduced to allow to change it. Then similar to inet/udp_sk_bound_dev_eq(), sctp_sk_bound_dev_eq() is added to check either dif or sdif is equal to sk_bound_dev_if, and to check sid is 0 or l3mdev_accept is 1 if sk_bound_dev_if is not set. This function is used to match a association or a endpoint, namely called by sctp_addrs_lookup_transport() and sctp_endpoint_is_match(). All functions that needs updating are: sctp_rcv(): asoc: __sctp_rcv_lookup() __sctp_lookup_association() -> sctp_addrs_lookup_transport() __sctp_rcv_lookup_harder() __sctp_rcv_init_lookup() __sctp_lookup_association() -> sctp_addrs_lookup_transport() __sctp_rcv_walk_lookup() __sctp_rcv_asconf_lookup() __sctp_lookup_association() -> sctp_addrs_lookup_transport() ep: __sctp_rcv_lookup_endpoint() -> sctp_endpoint_is_match() sctp_connect(): sctp_endpoint_is_peeled_off() __sctp_lookup_association() sctp_has_association() sctp_lookup_association() __sctp_lookup_association() -> sctp_addrs_lookup_transport() sctp_diag_dump_one(): sctp_transport_lookup_process() -> sctp_addrs_lookup_transport() Signed-off-by: Xin Long Signed-off-by: David S. Miller