Merge tag 'net-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from netfilter.

  Current release - regressions:

   - four fixes for the netdev per-instance locking

  Current release - new code bugs:

   - consolidate more code between existing Rx zero-copy and uring so
     that the latter doesn't miss / have to duplicate the safety checks

  Previous releases - regressions:

   - ipv6: fix omitted Netlink attributes when using SKIP_STATS

  Previous releases - always broken:

   - net: fix geneve_opt length integer overflow

   - udp: fix multiple wrap arounds of sk->sk_rmem_alloc when it
     approaches INT_MAX

   - dsa: mvpp2: add a lock to avoid corruption of the shared TCAM

   - dsa: airoha: fix issues with traffic QoS configuration / offload,
     and flow table offload

  Misc:

   - touch up the Netlink YAML specs of old families to make them usable
     for user space C codegen"

* tag 'net-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (56 commits)
  selftests: net: amt: indicate progress in the stress test
  netlink: specs: rt_route: pull the ifa- prefix out of the names
  netlink: specs: rt_addr: pull the ifa- prefix out of the names
  netlink: specs: rt_addr: fix get multi command name
  netlink: specs: rt_addr: fix the spec format / schema failures
  net: avoid false positive warnings in __net_mp_close_rxq()
  net: move mp dev config validation to __net_mp_open_rxq()
  net: ibmveth: make veth_pool_store stop hanging
  arcnet: Add NULL check in com20020pci_probe()
  ipv6: Do not consider link down nexthops in path selection
  ipv6: Start path selection from the first nexthop
  usbnet:fix NPE during rx_complete
  net: octeontx2: Handle XDP_ABORTED and XDP invalid as XDP_DROP
  net: fix geneve_opt length integer overflow
  io_uring/zcrx: fix selftests w/ updated netdev Python helpers
  selftests: net: use netdevsim in netns test
  docs: net: document netdev notifier expectations
  net: dummy: request ops lock
  netdevsim: add dummy device notifiers
  net: rename rtnl_net_debug to lock_debug
  ...

3 files changed, 136 insertions, 109 deletions

diff --git a/Documentation/netlink/specs/rt_addr.yaml b/Documentation/netlink/specs/rt_addr.yaml
index 5dd5469044c7..df6b23f06a22 100644
--- a/Documentation/netlink/specs/rt_addr.yaml
+++ b/Documentation/netlink/specs/rt_addr.yaml
@@ -78,45 +78,46 @@ definitions:
 attribute-sets:
   -
     name: addr-attrs
+    name-prefix: ifa-
     attributes:
       -
-        name: ifa-address
+        name: address
         type: binary
         display-hint: ipv4
       -
-        name: ifa-local
+        name: local
         type: binary
         display-hint: ipv4
       -
-        name: ifa-label
+        name: label
         type: string
       -
-        name: ifa-broadcast
+        name: broadcast
         type: binary
         display-hint: ipv4
       -
-        name: ifa-anycast
+        name: anycast
         type: binary
       -
-        name: ifa-cacheinfo
+        name: cacheinfo
         type: binary
         struct: ifa-cacheinfo
       -
-        name: ifa-multicast
+        name: multicast
         type: binary
       -
-        name: ifa-flags
+        name: flags
         type: u32
         enum: ifa-flags
         enum-as-flags: true
       -
-        name: ifa-rt-priority
+        name: rt-priority
         type: u32
       -
-        name: ifa-target-netnsid
+        name: target-netnsid
         type: binary
       -
-        name: ifa-proto
+        name: proto
         type: u8
 
 
@@ -137,10 +138,10 @@ operations:
             - ifa-prefixlen
             - ifa-scope
             - ifa-index
-            - ifa-address
-            - ifa-label
-            - ifa-local
-            - ifa-cacheinfo
+            - address
+            - label
+            - local
+            - cacheinfo
     -
       name: deladdr
       doc: Remove address
@@ -154,8 +155,8 @@ operations:
             - ifa-prefixlen
             - ifa-scope
             - ifa-index
-            - ifa-address
-            - ifa-local
+            - address
+            - local
     -
       name: getaddr
       doc: Dump address information.
@@ -169,7 +170,7 @@ operations:
           value: 20
           attributes: *ifaddr-all
     -
-      name: getmaddrs
+      name: getmulticast
       doc: Get / dump IPv4/IPv6 multicast addresses.
       attribute-set: addr-attrs
       fixed-header: ifaddrmsg
@@ -182,11 +183,12 @@ operations:
         reply:
           value: 58
           attributes: &mcaddr-attrs
-            - ifa-multicast
-            - ifa-cacheinfo
+            - multicast
+            - cacheinfo
       dump:
         request:
           value: 58
+          attributes:
             - ifa-family
         reply:
           value: 58
diff --git a/Documentation/netlink/specs/rt_route.yaml b/Documentation/netlink/specs/rt_route.yaml
index a674103e5bc4..292469c7d4b9 100644
--- a/Documentation/netlink/specs/rt_route.yaml
+++ b/Documentation/netlink/specs/rt_route.yaml
@@ -80,165 +80,167 @@ definitions:
 attribute-sets:
   -
     name: route-attrs
+    name-prefix: rta-
     attributes:
       -
-        name: rta-dst
+        name: dst
         type: binary
         display-hint: ipv4
       -
-        name: rta-src
+        name: src
         type: binary
         display-hint: ipv4
       -
-        name: rta-iif
+        name: iif
         type: u32
       -
-        name: rta-oif
+        name: oif
         type: u32
       -
-        name: rta-gateway
+        name: gateway
         type: binary
         display-hint: ipv4
       -
-        name: rta-priority
+        name: priority
         type: u32
       -
-        name: rta-prefsrc
+        name: prefsrc
         type: binary
         display-hint: ipv4
       -
-        name: rta-metrics
+        name: metrics
         type: nest
-        nested-attributes: rta-metrics
+        nested-attributes: metrics
       -
-        name: rta-multipath
+        name: multipath
         type: binary
       -
-        name: rta-protoinfo # not used
+        name: protoinfo # not used
         type: binary
       -
-        name: rta-flow
+        name: flow
         type: u32
       -
-        name: rta-cacheinfo
+        name: cacheinfo
         type: binary
         struct: rta-cacheinfo
       -
-        name: rta-session # not used
+        name: session # not used
         type: binary
       -
-        name: rta-mp-algo # not used
+        name: mp-algo # not used
         type: binary
       -
-        name: rta-table
+        name: table
         type: u32
       -
-        name: rta-mark
+        name: mark
         type: u32
       -
-        name: rta-mfc-stats
+        name: mfc-stats
         type: binary
       -
-        name: rta-via
+        name: via
         type: binary
       -
-        name: rta-newdst
+        name: newdst
         type: binary
       -
-        name: rta-pref
+        name: pref
         type: u8
       -
-        name: rta-encap-type
+        name: encap-type
         type: u16
       -
-        name: rta-encap
+        name: encap
         type: binary # tunnel specific nest
       -
-        name: rta-expires
+        name: expires
         type: u32
       -
-        name: rta-pad
+        name: pad
         type: binary
       -
-        name: rta-uid
+        name: uid
         type: u32
       -
-        name: rta-ttl-propagate
+        name: ttl-propagate
         type: u8
       -
-        name: rta-ip-proto
+        name: ip-proto
         type: u8
       -
-        name: rta-sport
+        name: sport
         type: u16
       -
-        name: rta-dport
+        name: dport
         type: u16
       -
-        name: rta-nh-id
+        name: nh-id
         type: u32
       -
-        name: rta-flowlabel
+        name: flowlabel
         type: u32
         byte-order: big-endian
         display-hint: hex
   -
-    name: rta-metrics
+    name: metrics
+    name-prefix: rtax-
     attributes:
       -
-        name: rtax-unspec
+        name: unspec
         type: unused
         value: 0
       -
-        name: rtax-lock
+        name: lock
         type: u32
       -
-        name: rtax-mtu
+        name: mtu
         type: u32
       -
-        name: rtax-window
+        name: window
         type: u32
       -
-        name: rtax-rtt
+        name: rtt
         type: u32
       -
-        name: rtax-rttvar
+        name: rttvar
         type: u32
       -
-        name: rtax-ssthresh
+        name: ssthresh
         type: u32
       -
-        name: rtax-cwnd
+        name: cwnd
         type: u32
       -
-        name: rtax-advmss
+        name: advmss
         type: u32
       -
-        name: rtax-reordering
+        name: reordering
         type: u32
       -
-        name: rtax-hoplimit
+        name: hoplimit
         type: u32
       -
-        name: rtax-initcwnd
+        name: initcwnd
         type: u32
       -
-        name: rtax-features
+        name: features
         type: u32
       -
-        name: rtax-rto-min
+        name: rto-min
         type: u32
       -
-        name: rtax-initrwnd
+        name: initrwnd
         type: u32
       -
-        name: rtax-quickack
+        name: quickack
         type: u32
       -
-        name: rtax-cc-algo
+        name: cc-algo
         type: string
       -
-        name: rtax-fastopen-no-cookie
+        name: fastopen-no-cookie
         type: u32
 
 operations:
@@ -254,18 +256,18 @@ operations:
           value: 26
           attributes:
             - rtm-family
-            - rta-src
+            - src
             - rtm-src-len
-            - rta-dst
+            - dst
             - rtm-dst-len
-            - rta-iif
-            - rta-oif
-            - rta-ip-proto
-            - rta-sport
-            - rta-dport
-            - rta-mark
-            - rta-uid
-            - rta-flowlabel
+            - iif
+            - oif
+            - ip-proto
+            - sport
+            - dport
+            - mark
+            - uid
+            - flowlabel
         reply:
           value: 24
           attributes: &all-route-attrs
@@ -278,34 +280,34 @@ operations:
             - rtm-scope
             - rtm-type
             - rtm-flags
-            - rta-dst
-            - rta-src
-            - rta-iif
-            - rta-oif
-            - rta-gateway
-            - rta-priority
-            - rta-prefsrc
-            - rta-metrics
-            - rta-multipath
-            - rta-flow
-            - rta-cacheinfo
-            - rta-table
-            - rta-mark
-            - rta-mfc-stats
-            - rta-via
-            - rta-newdst
-            - rta-pref
-            - rta-encap-type
-            - rta-encap
-            - rta-expires
-            - rta-pad
-            - rta-uid
-            - rta-ttl-propagate
-            - rta-ip-proto
-            - rta-sport
-            - rta-dport
-            - rta-nh-id
-            - rta-flowlabel
+            - dst
+            - src
+            - iif
+            - oif
+            - gateway
+            - priority
+            - prefsrc
+            - metrics
+            - multipath
+            - flow
+            - cacheinfo
+            - table
+            - mark
+            - mfc-stats
+            - via
+            - newdst
+            - pref
+            - encap-type
+            - encap
+            - expires
+            - pad
+            - uid
+            - ttl-propagate
+            - ip-proto
+            - sport
+            - dport
+            - nh-id
+            - flowlabel
       dump:
         request:
           value: 26
diff --git a/Documentation/networking/netdevices.rst b/Documentation/networking/netdevices.rst
index ebb868f50ac2..6c2d8945f597 100644
--- a/Documentation/networking/netdevices.rst
+++ b/Documentation/networking/netdevices.rst
@@ -343,6 +343,29 @@ there are two sets of interfaces: ``dev_xxx`` and ``netif_xxx`` (e.g.,
 acquiring the instance lock themselves, while the ``netif_xxx`` functions
 assume that the driver has already acquired the instance lock.
 
+Notifiers and netdev instance lock
+==================================
+
+For device drivers that implement shaping or queue management APIs,
+some of the notifiers (``enum netdev_cmd``) are running under the netdev
+instance lock.
+
+For devices with locked ops, currently only the following notifiers are
+running under the lock:
+* ``NETDEV_REGISTER``
+* ``NETDEV_UP``
+
+The following notifiers are running without the lock:
+* ``NETDEV_UNREGISTER``
+
+There are no clear expectations for the remaining notifiers. Notifiers not on
+the list may run with or without the instance lock, potentially even invoking
+the same notifier type with and without the lock from different code paths.
+The goal is to eventually ensure that all (or most, with a few documented
+exceptions) notifiers run under the instance lock. Please extend this
+documentation whenever you make explicit assumption about lock being held
+from a notifier.
+
 NETDEV_INTERNAL symbol namespace
 ================================