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linux/net
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Cosmin Ratiu 6bbd1bce30 devlink: Allow rate node parents from other devlinks 
This commit makes use of the building blocks previously added to
implement cross-device rate nodes.

A new 'supported_cross_device_rate_nodes' bool is added to devlink_ops
which lets drivers advertise support for cross-device rate objects.
If enabled and if there is a common shared devlink instance, then:
- all rate objects will be stored in the top-most common nested instance
  and
- rate objects can have parents from other devices sharing the same
  common instance.

Storing rates in the common shared ancestor is safe, because it is
reference counted by its nested devlink instances, so it's guaranteed to
outlive them. Furthermore, the shared devlink infra guarantees a given
nested devlink hierarchy is managed by the same driver.

The parent devlink from info->ctx is not locked, so none of its mutable
fields can be used. But parent setting only requires comparing devlink
pointer comparisons. Additionally, since the shared devlink is locked,
other rate operations cannot concurrently happen.

Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Carolina Jubran <cjubran@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260701073254.754518-8-tariqt@nvidia.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-07-07 11:31:26 +02:00
..
6lowpan 6lowpan: fix NHC entry use-after-free on error path 2026-06-11 15:27:07 -07:00
9p 9p: Add missing read barrier in virtio zero-copy path 2026-06-21 05:22:57 +00:00
802 appletalk: move the protocol out of tree 2026-06-16 14:37:06 -07:00
8021q vlan: defer real device state propagation to netdev_work 2026-06-25 10:18:40 -07:00
atm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-16 14:59:58 -07:00
batman-adv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-07-03 07:46:27 +02:00
bluetooth Bluetooth: L2CAP: validate connectionless PSM length 2026-06-11 14:24:41 -04:00
bpf bpf: Fix partial copy of non-linear test_run output 2026-06-21 17:55:06 -07:00
bridge netfilter pull request nf-next-26-07-02 2026-07-03 22:00:24 +02:00
can Networking changes for 7.1. 2026-04-14 18:36:10 -07:00
ceph libceph: Fix potential null-ptr-deref in decode_choose_args() 2026-05-12 21:00:59 +02:00
core net: fib_rules: Destroy ops->lock in fib_rules_unregister(). 2026-07-07 10:51:06 +02:00
dcb
devlink devlink: Allow rate node parents from other devlinks 2026-07-07 11:31:26 +02:00
dns_resolver net/dns_resolver: use kasprintf + kmemdup_nul to simplify dns_query 2026-06-04 18:39:29 -07:00
dsa net: dsa: Fix skb ownership in taggers 2026-06-27 15:44:12 -07:00
ethernet
ethtool net: ethtool: keep rtnl_lock for ops using ethtool_op_get_link() 2026-06-25 10:18:34 -07:00
handshake handshake: Require admin permission for DONE command 2026-06-12 15:45:44 -07:00
hsr net: hsr: simplify fill_last_seq_nrs() 2026-06-12 16:20:28 -07:00
ieee802154 ieee802154: allow legacy LLSEC ADD/DEL ops to pass strict validation 2026-06-19 23:02:42 +02:00
ife net: ife: require ETH_HLEN to be pullable in ife_decode() 2026-06-13 17:34:39 -07:00
ipv4 ipv4: fib: Define fib_table_hash_lock under CONFIG_IP_MULTIPLE_TABLES. 2026-07-07 10:51:06 +02:00
ipv6 net: ipv6: report multicast group user count 2026-07-03 08:50:44 +02:00
iucv Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-05-28 14:02:21 -07:00
kcm Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-16 14:59:58 -07:00
key ipsec-2026-06-22 2026-06-23 16:22:24 -07:00
l2tp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-04 15:29:04 -07:00
l3mdev
lapb
llc net: llc: make empty have static storage duration 2026-06-18 17:52:56 -07:00
mac80211 Quite a few last updates, notably: 2026-06-10 07:59:45 -07:00
mac802154 mac802154: Prevent overwrite return code in mac802154_perform_association() 2026-06-19 22:55:16 +02:00
mctp mctp: convert to getsockopt_iter 2026-05-10 10:11:07 -07:00
mpls net: Remove rtnl_held of struct fib_dump_filter. 2026-06-08 17:06:23 -07:00
mptcp mptcp: options: rst: drop unused skb parameter 2026-06-11 15:33:39 -07:00
ncsi
netfilter netfilter pull request nf-next-26-07-02 2026-07-03 22:00:24 +02:00
netlabel Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-11 14:33:35 -07:00
netlink Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-05-28 14:02:21 -07:00
nfc nfc: nci: uart: Constify struct tty_ldisc_ops 2026-06-11 20:21:32 +02:00
nsh
openvswitch openvswitch: conntrack: annotate ct limit hlist traversal 2026-06-25 08:38:00 -07:00
packet net/packet: fix TOCTOU race on mmap'd vnet_hdr in tpacket_snd() 2026-04-22 20:16:34 -07:00
phonet net: phonet: free phonet_device after RCU grace period 2026-06-08 17:37:07 -07:00
psample net: psample: fix info leak in PSAMPLE_ATTR_DATA 2026-06-17 16:35:50 -07:00
psp psp: add a new netdev event for dev unregister 2026-06-12 18:31:32 -07:00
qrtr Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-16 14:59:58 -07:00
rds Including fixes from netfilter and IPsec. 2026-06-25 12:25:36 -07:00
rfkill rfkill: Replace strcpy() with memcpy() 2026-06-10 10:22:47 +02:00
rxrpc rxrpc: Fix rxrpc_rotate_tx_rotate() to check there's something to rotate 2026-06-25 10:07:19 -07:00
sched netfilter pull request nf-next-26-07-02 2026-07-03 22:00:24 +02:00
sctp sctp: fix addr_wq_timer race in sctp_free_addr_wq() 2026-06-30 16:58:59 -07:00
shaper net: shaper: add a note that we expect cap dumps to be tiny 2026-06-11 12:55:23 +02:00
smc Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-05-28 14:02:21 -07:00
strparser net: strparser: fix skb_head leak in strp_abort_strp() 2026-04-14 12:37:00 +02:00
sunrpc NFS Client Updates for Linux 7.2 2026-06-23 18:36:41 -07:00
switchdev
tipc tipc: fix out-of-bounds read in broadcast Gap ACK blocks 2026-06-29 17:30:20 -07:00
tls net: skmsg: preserve sg.copy across SG transforms 2026-06-16 14:38:46 -07:00
unix Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-04 15:29:04 -07:00
vmw_vsock vsock/virtio: rewrite MSG_ZEROCOPY flag handling 2026-06-30 15:59:18 +02:00
wireless Quite a few last updates, notably: 2026-06-10 07:59:45 -07:00
x25 x25: convert to getsockopt_iter 2026-05-10 10:11:08 -07:00
xdp Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2026-06-04 15:29:04 -07:00
xfrm ipsec-2026-06-22 2026-06-23 16:22:24 -07:00
compat.c net: Remove support for AIO on sockets 2026-05-29 14:05:30 +08:00
devres.c
Kconfig appletalk: move the protocol out of tree 2026-06-16 14:37:06 -07:00
Kconfig.debug
Makefile appletalk: move the protocol out of tree 2026-06-16 14:37:06 -07:00
socket.c Networking changes for 7.2. 2026-06-17 08:17:00 +01:00
sysctl_net.c