Hi David, you were asking about my work in progress of the SMB-Direct driver for the linux kernel. I dumped what I have to git://git.samba.org/metze/linux/smbdirect.git into the smbdirect-work-in-progress branch. See https://git.samba.org/?p=metze/linux/smbdirect.git;a=shortlog;h=refs/heads/smbdirect-work-in-progress From the README: This is a work in progress SMB-Direct driver for the linux kernel It's just a raw dump of what I currently have to get some help with debugging kernel freezes. A lot of cleanups are required and real commits with useful commit messages... The protocol is specified by Microsoft in [MS-SMBD] SMB2 Remote Direct Memory Access (RDMA) Transport Protocol The aim is to later reuse parts of this for other operating systems like FreeBSD. The first goal is to provide a socket fd to userspace (or in kernel consumers) which provides semantics like a TCP socket which is used as transport for SMB3. Basically frames are submitted with a 4 byte length header. The second goal will be to provide RDMA read and write support via ioctl() calls on the main smb-direct socket fd, but the api for that is not yet designed. But it needs to avoid data copy as much as possible. loadchelsio.sh, loadrxe.sh, loadsiw.sh offer some examples to setup the rdma stack before using 'insmod smbdirect.ko'. The userspace 'smbdirect-tool' offers some commands for testing. "connect <dstaddr> [<dstport> [<srcaddr> [<srcport>]]]" "172.31.9.166" "172.31.9.166 5445" "172.31.9.166 5445 172.31.9.167" "fd3a:aaa3:ee87:ff09:f189:7430:7976:6276 5445" "listen [<port> [<addr>]]" "5445" "5445 172.31.9.166" "445 fd3a:aaa3:ee87:ff09:f189:7430:7976:6276" The current state is the following: - It compiles with v4.{10,11,12,13,14,15} - The kernel freezes after some time on an active connection, e.g. when readv() is called - Also rmmod smbdirect causes a freeze after some time As you gave a talk about debugging the linux kernel you might be able to find the reasons for the (silent) freezes. metze
Attachment:
signature.asc
Description: OpenPGP digital signature
