linux/net/mctp/test, branch master

net: mctp: tests: use actual address when creating dev with addr

2026-04-07T01:04:02Z

Sashiko reports: > This isn't a bug in the core networking code, but the addr parameter > appears to be ignored here. In mctp_test_create_dev_with_addr(), we are ignoring the addr argument and just using `8`. Use the passed address instead. All invocations use 8 anyway, so no effective change at present. Signed-off-by: Jeremy Kerr Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260403-dev-mctp-fix-test-addr-v1-1-b7fa789cdd9b@codeconstruct.com.au Signed-off-by: Jakub Kicinski

net: mctp: don't require a route for null-EID ingress

2026-04-02T11:31:37Z

Currently, if we receive a physically-addressed packet for the local stack, we perform a route_lookup_null to find a matching device-based route. If a route is present, it will always have the ->output fn set to mctp_dst_input, which provides our delivery mechanism. However, if we don't yet have any local addresses assigned, we won't have any local routes to lookup, so this will fail. One of the use-cases for physical addressing is initial address assignment on endpoint nodes, where we would have no addresses, and therefore no local routes. Instead of iterating routes (looking for one matching the dev), just create a suitable mctp_dst for the device directly. Add a testcase for the no-route case too. Signed-off-by: Jeremy Kerr Link: https://patch.msgid.link/20260331-dev-mctp-null-eids-v1-3-b4d047372eaf@codeconstruct.com.au Signed-off-by: Paolo Abeni

net: mctp: allow local TX with no address assigned

2026-04-02T11:31:36Z

If we're operating as a non-bus-owner endpoint, we may want to perform MCTP communication to get an address assigned. In this case, we'll have no local addresses, but can TX just fine either with extended routing, or where a direct route exists. Signed-off-by: Jeremy Kerr Link: https://patch.msgid.link/20260331-dev-mctp-null-eids-v1-2-b4d047372eaf@codeconstruct.com.au Signed-off-by: Paolo Abeni

net: mctp: perform source address lookups when we populate our dst

2026-04-02T11:31:36Z

Rather than querying the output device for its address in mctp_local_output, set up the source address when we're populating the dst structure. If no address is assigned, use MCTP_ADDR_NULL. This will allow us more flexibility when routing for NULL-source-eid cases. For now though, we still reject a NULL source address in the output path. We need to update the tests a little, so that addresses are assigned before we do the dst lookups. Signed-off-by: Jeremy Kerr Link: https://patch.msgid.link/20260331-dev-mctp-null-eids-v1-1-b4d047372eaf@codeconstruct.com.au Signed-off-by: Paolo Abeni

net: mctp: avoid copy in fragmentation loop for near-MTU messages

2026-03-27T01:47:29Z

Currently, we incorrectly send messages that are within 4 bytes (a struct mctp_hdr) smaller than the MTU through mctp_do_fragment_route(). This has no effect on the actual fragmentation, as we will still send as one packet, but unnecessarily copies the original skb into a new single-fragment skb. Instead of having the MTU comparisons in both mctp_local_output() and mctp_do_fragment_route(), feed all local messages through the latter, and add the single-packet optimisation there. This means we can coalesce the routing path of mctp_local_output, so our out_release path is now solely for errors, so rename the label accordingly. Include a check in the route tests for the single-packet case too. Reported-by: yuanzhaoming Closes: https://github.com/openbmc/linux/commit/269936db5eb3962fe290b1dc4dbf1859cd5a04dd#r175836230 Signed-off-by: Jeremy Kerr Reviewed-by: Simon Horman Link: https://patch.msgid.link/20260324-dev-mtu-copy-v1-1-7af6bd7027d3@codeconstruct.com.au Signed-off-by: Jakub Kicinski

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51Z

This was done entirely with mindless brute force, using git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28Z

This is the result of running the Coccinelle script from scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to avoid scalar types (which need careful case-by-case checking), and instead replace kmalloc-family calls that allocate struct or union object instances: Single allocations: kmalloc(sizeof(TYPE), ...) are replaced with: kmalloc_obj(TYPE, ...) Array allocations: kmalloc_array(COUNT, sizeof(TYPE), ...) are replaced with: kmalloc_objs(TYPE, COUNT, ...) Flex array allocations: kmalloc(struct_size(PTR, FAM, COUNT), ...) are replaced with: kmalloc_flex(*PTR, FAM, COUNT, ...) (where TYPE may also be *VAR) The resulting allocations no longer return "void *", instead returning "TYPE *". Signed-off-by: Kees Cook

net: mctp: test: move TX packetqueue from dst to dev

2025-12-01T21:52:13Z

To capture TX packets during a test, we are currently intercepting the dst->output with an implementation that adds the transmitted packet to a skb queue attached to the test-specific mock dst. The netdev itself is not involved in the test TX path. Instead, we can just use our test device to stash TXed packets for later inspection by the test. This means we can include the actual mctp_dst_output() implementation in the test (by setting dst.output in the test case), and don't need to be creating fake dst objects, or their corresponding skb queues. We need to ensure that the netdev is up to allow delivery to ndo_start_xmit, but the tests assume active devices at present anyway. Signed-off-by: Jeremy Kerr Link: https://patch.msgid.link/20251126-dev-mctp-test-tx-queue-v2-1-4e5bbd1d6c57@codeconstruct.com.au Signed-off-by: Jakub Kicinski

net: Convert proto_ops connect() callbacks to use sockaddr_unsized

2025-11-05T03:10:32Z

Update all struct proto_ops connect() callback function prototypes from "struct sockaddr *" to "struct sockaddr_unsized *" to avoid lying to the compiler about object sizes. Calls into struct proto handlers gain casts that will be removed in the struct proto conversion patch. No binary changes expected. Signed-off-by: Kees Cook Link: https://patch.msgid.link/20251104002617.2752303-3-kees@kernel.org Signed-off-by: Jakub Kicinski

net: Convert proto_ops bind() callbacks to use sockaddr_unsized

2025-11-05T03:10:32Z

Update all struct proto_ops bind() callback function prototypes from "struct sockaddr *" to "struct sockaddr_unsized *" to avoid lying to the compiler about object sizes. Calls into struct proto handlers gain casts that will be removed in the struct proto conversion patch. No binary changes expected. Signed-off-by: Kees Cook Link: https://patch.msgid.link/20251104002617.2752303-2-kees@kernel.org Signed-off-by: Jakub Kicinski