user/sven/linux.git/include/net/mctp.h, branch v6.3.12

mctp: Use output netdev to allocate skb headroom

2022-04-01T11:04:15Z

Previously the skb was allocated with headroom MCTP_HEADER_MAXLEN, but that isn't sufficient if we are using devs that are not MCTP specific. This also adds a check that the smctp_halen provided to sendmsg for extended addressing is the correct size for the netdev. Fixes: 833ef3b91de6 ("mctp: Populate socket implementation") Reported-by: Matthew Rinaldi Signed-off-by: Matt Johnston Signed-off-by: David S. Miller

mctp: replace mctp_address_ok with more fine-grained helpers

2022-02-19T05:24:28Z

Currently, we have mctp_address_ok(), which checks if an EID is in the "valid" range of 8-254 inclusive. However, 0 and 255 may also be valid addresses, depending on context. 0 is the NULL EID, which may be set when physical addressing is used. 255 is valid as a destination address for broadcasts. This change renames mctp_address_ok to mctp_address_unicast, and adds similar helpers for broadcast and null EIDs, which will be used in an upcoming commit. Signed-off-by: Jeremy Kerr Signed-off-by: Jakub Kicinski

mctp: Add SIOCMCTP{ALLOC,DROP}TAG ioctls for tag control

2022-02-09T12:00:11Z

This change adds a couple of new ioctls for mctp sockets: SIOCMCTPALLOCTAG and SIOCMCTPDROPTAG. These ioctls provide facilities for explicit allocation / release of tags, overriding the automatic allocate-on-send/release-on-reply and timeout behaviours. This allows userspace more control over messages that may not fit a simple request/response model. In order to indicate a pre-allocated tag to the sendmsg() syscall, we introduce a new flag to the struct sockaddr_mctp.smctp_tag value: MCTP_TAG_PREALLOC. Additional changes from Jeremy Kerr . Contains a fix that was: Reported-by: kernel test robot Signed-off-by: Matt Johnston Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Add helper for address match checking

2022-02-09T12:00:11Z

Currently, we have a couple of paths that check that an EID matches, or the match value is MCTP_ADDR_ANY. Rather than open coding this, add a little helper. Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Pass flow data & flow release events to drivers

2021-10-29T12:23:51Z

Now that we have an extension for MCTP data in skbs, populate the flow when a key has been created for the packet, and add a device driver operation to inform of flow destruction. Includes a fix for a warning with test builds: Reported-by: kernel test robot Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Add flow extension to skb

2021-10-29T12:23:51Z

This change adds a new skb extension for MCTP, to represent a request/response flow. The intention is to use this in a later change to allow i2c controllers to correctly configure a multiplexer over a flow. Since we have a cleanup function in the core path (if an extension is present), we'll need to make CONFIG_MCTP a bool, rather than a tristate. Includes a fix for a build warning with clang: Reported-by: kernel test robot Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

mctp: Implement extended addressing

2021-10-26T13:58:45Z

This change allows an extended address struct - struct sockaddr_mctp_ext - to be passed to sendmsg/recvmsg. This allows userspace to specify output ifindex and physical address information (for sendmsg) or receive the input ifindex/physaddr for incoming messages (for recvmsg). This is typically used by userspace for MCTP address discovery and assignment operations. The extended addressing facility is conditional on a new sockopt: MCTP_OPT_ADDR_EXT; userspace must explicitly enable addressing before the kernel will consume/populate the extended address data. Includes a fix for an uninitialised var: Reported-by: kernel test robot Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

2021-10-22T10:41:16Z

Lots of simnple overlapping additions. With a build fix from Stephen Rothwell. Signed-off-by: David S. Miller

mctp: unify sockaddr_mctp types

2021-10-18T12:47:09Z

Use the more precise __kernel_sa_family_t for smctp_family, to match struct sockaddr. Also, use an unsigned int for the network member; negative networks don't make much sense. We're already using unsigned for mctp_dev and mctp_skb_cb, but need to change mctp_sock to suit. Fixes: 60fc63981693 ("mctp: Add sockaddr_mctp to uapi") Signed-off-by: Jeremy Kerr Acked-by: Eugene Syromiatnikov Signed-off-by: David S. Miller

mctp: Implement a timeout for tags

2021-09-29T10:00:11Z

Currently, a MCTP (local-eid,remote-eid,tag) tuple is allocated to a socket on send, and only expires when the socket is closed. This change introduces a tag timeout, freeing the tuple after a fixed expiry - currently six seconds. This is greater than (but close to) the max response timeout in upper-layer bindings. Signed-off-by: Jeremy Kerr Signed-off-by: David S. Miller