linux-toradex.git/Documentation/networking/mctp.rst, branch v6.18-rc4 Linux kernel for Apalis and Colibri modules mctp: Add SIOCMCTP{ALLOC,DROP}TAG ioctls for tag control 2022-02-09T12:00:11+00:00 Matt Johnston matt@codeconstruct.com.au 2022-02-09T04:05:57+00:00 63ed1aab3d40aa61aaa66819bdce9377ac7f40fa 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 <jk@codeconstruct.com.au>. Contains a fix that was: Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Matt Johnston <matt@codeconstruct.com.au> Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net> 
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 <jk@codeconstruct.com.au>.

Contains a fix that was:
Reported-by: kernel test robot <lkp@intel.com>

Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-10-22T10:41:16+00:00 David S. Miller davem@davemloft.net 2021-10-22T10:41:16+00:00 bdfa75ad70e93633e18b1ed2b3866c01aa9bf9d2 Lots of simnple overlapping additions. With a build fix from Stephen Rothwell. Signed-off-by: David S. Miller <davem@davemloft.net> 
Lots of simnple overlapping additions.

With a build fix from Stephen Rothwell.

Signed-off-by: David S. Miller <davem@davemloft.net>
mctp: unify sockaddr_mctp types 2021-10-18T12:47:09+00:00 Jeremy Kerr jk@codeconstruct.com.au 2021-10-18T03:29:34+00:00 b416beb25d9317499c823aea1522eefd8d72ea36 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 <jk@codeconstruct.com.au> Acked-by: Eugene Syromiatnikov <esyr@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
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 <jk@codeconstruct.com.au>
Acked-by: Eugene Syromiatnikov <esyr@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
doc/mctp: Add a little detail about kernel internals 2021-09-29T10:00:12+00:00 Jeremy Kerr jk@codeconstruct.com.au 2021-09-29T07:26:12+00:00 f4d41c59135dbb7a1e0d332692ef3471009cd016 Describe common flows and refcounting behaviour. Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net> 
Describe common flows and refcounting behaviour.

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
mctp: Add MCTP overview document 2021-07-29T14:06:50+00:00 Jeremy Kerr jk@codeconstruct.com.au 2021-07-29T02:20:53+00:00 6a2d98b18900002b6d24c4c3850c1c2467d13898 This change adds a brief document about the sockets API provided for sending and receiving MCTP messages from userspace. This is roughly based on the OpenBMC design document, at: https://github.com/openbmc/docs/blob/master/designs/mctp/mctp-kernel.md Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au> Signed-off-by: David S. Miller <davem@davemloft.net> 
This change adds a brief document about the sockets API provided for
sending and receiving MCTP messages from userspace.

This is roughly based on the OpenBMC design document, at:

  https://github.com/openbmc/docs/blob/master/designs/mctp/mctp-kernel.md

Signed-off-by: Jeremy Kerr <jk@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>