Provided by: smc-tools_1.7.0-0ubuntu1_amd64 
NAME
smcss - print information about the AF_SMC sockets and link groups
SYNOPSIS
smcss [--debug|-d] [--smcd|-D] [--wide|-W]
smcss {--all|-a} [--debug|-d] [--smcd|-D] [--wide|-W]
smcss [--debug|-d] [--smcr|-R] [--wide|-W]
smcss {--all|-a} [--debug|-d] [--smcr|-R] [--wide|-W]
smcss {--listening|-l} [--wide|-W]
smcss {--version|-v}
smcss {--help|-h}
DESCRIPTION
smcss prints information about the Linux AF_SMC sockets and link groups. The type of
information printed is controlled by the first argument, as follows:
(none)
displays a list of connecting, closing, or connected SMC sockets with basic
information.
-a, --all
displays all types of SMC sockets: listening, opening, closing, and connected.
-l, --listening
shows listening sockets only. These are omitted by default.
OPTIONS
-d, --debug
displays additional debug information, such as shutdown state.
-D, --smcd
displays additional SMC-D specific information. Shows SMC-D sockets only.
-h, --help
displays usage information.
-R, --smcr
displays additional SMC-R specific information. Shows SMC-R sockets only.
-v, --version
displays program version.
-W, --wide
do not truncate IP addresses.
OUTPUT
State
The state of the socket. The state can be one of these values:
INIT The SMC socket is being initialized. It is not connected nor listening yet.
CLOSED The SMC socket is closed. It is not connected nor listening anymore.
LISTEN The SMC socket is a listening socket, waiting for incoming connection requests.
ACTIVE The SMC socket has an established connection. In this state, the TCP connection is
fully established, rendezvous processing has been completed, and SMC peers can
exchange data via RDMA.
PEERCLW1
No further data will be sent to the peer.
PEERCLW2
No further data will be sent to or received from the peer.
APPLCLW1
No further data will be received from the peer.
APPLCLW2
No further data will be received from or sent to the peer.
APPLFINCLW
The peer has closed the socket.
PEERFINCLW
The socket is closed locally.
PEERABORTW
The socket was abnormally closed locally.
PROCESSABORT
The peer has closed the socket abnormally.
UID
User ID of the SMC socket.
Inode
Inode attribute of the socket.
Local Address
Address and port number of the local end of the SMC socket. The displayed address is
truncated when it ends with '..'. -W, --wide can be used to display addresses
untruncated.
Peer Address
Address and port number of the remote end of the socket. Analogous to "Local Address".
Intf
When the socket is explicitly bound with setsockopt option SO_BINDTODEVICE then Intf shows
the interface number of the Ethernet device to which the socket is bound.
Mode
SMCD The SMC socket uses SMC-D for data exchange.
SMCR The SMC socket uses SMC-R for data exchange.
TCP The SMC socket uses the TCP protocol for data exchange, because an SMC connection
could not be established.
In case of an error during connection setup, respective error codes will be displayed in
the format <local>/<remote>.
Linux error codes:
0x01010000 Out of memory
0x02010000 Timeout while waiting for confirm link message over RDMA device
0x02020000 Timeout while waiting for RDMA device to be added
0x03000000 Configuration error
0x03010000 Peer does not support SMC
0x03020000 Connection uses IPsec
0x03030000 No SMC devices found (R and D)
0x03030001 No ISM device for SMC-D found
0x03030002 No RDMA device for SMC-R found
0x03030003 Hardware has no ISMv2 support
0x03030004 Peer sent no SMCv2 extension
0x03030005 Peer sent no SMC-Dv2 extension
0x03030006 Peer sent no ISMv2 SEID
0x03030007 No SMC-Dv2 device found, but required
0x03030008 Peer sent no UEID
0x03040000 SMC modes mismatch (R or D)
0x03050000 Peer has eyecatcher in RMBE
0x03060000 Fastopen sockopt not supported
0x03070000 IP prefix / subnet mismatch
0x03080000 Error retrieving VLAN ID of IP device
0x03090000 Error while registering VLAN ID on ISM device
0x030a0000 No active SMC-R link in link group
0x030b0000 SMC-R link from server not found
0x030c0000 SMC version mismatch
0x030d0000 SMC-D connection limit reached
0x030e0000 SMC-Rv2 connection found no route to peer
0x030f0000 SMC-Rv2 connection mismatch direct/indirect with peer 0x04000000
Synchronization error
0x05000000 Peer declined during handshake
0x09990000 Internal error
0x09990001 rtoken handling failed
0x09990002 RDMA link failed
0x09990003 RMB registration failed
ShutD
<-> The SMC socket has not been shut down.
R-> The SMC socket is shut down one-way and cannot receive data.
<-W The SMC socket is shut down one-way and cannot send data.
R-W The SMC socket is shut down in both ways and cannot receive or send data.
Token
Unique ID of the SMC socket connection.
Sndbuf
Size of the to-be-sent window of the SMC socket connection.
Rcvbuf
Size of the receiving window of the SMC socket connection (filled by peer).
Peerbuf
Size of the peer receiving window of the SMC socket connection (to fill during RDMA-
transfer).
rxprod-Cursor
Describes the current cursor location of the "Rcvbuf" for data to be received from the
peer.
rxcons-Cursor
Describes the current cursor location of the "Peerbuf" for data sent to peer and confirmed
by the peer.
rxFlags
SMC socket connection flags set by and received from the peer.
txprod-Cursor
Describes the current cursor location of the "Peerbuf" for data sent to peer.
txcons-Cursor
Describes the current cursor location of the "Rcvbuf" for data received from the peer and
confirmed to the peer.
txFlags
SMC socket connection flags set locally and sent to the peer.
txprep-Cursor
Describes the current cursor location of the "Sndbuf" for data to be sent. The data is to
be moved to the "Peerbuf".
txsent-Cursor
Describes the current cursor location of the "Sndbuf" for data sent. The data was moved
to the "Peerbuf".
txfin-Cursor
Describes the current cursor location of the "Sndbuf" for data sent and send completion
confirmed. The data was moved to the "Peerbuf" and completion was confirmed.
Role
CLNT The link group of the SMC socket is used for client connections.
SERV The link group of the SMC socket is used for server connections.
IB-Device
Name of the RoCE device used by the link group to which the SMC socket belongs.
Port
Port of the RoCE device used by the link group to which the SMC socket belongs.
Linkid
Unique link ID of the link within the link group to which the SMC socket belongs.
GID
Gid of the RoCE port used by the link group to which the SMC socket belongs.
Peer-GID
Gid of the Foreign RoCE port used by the link group to which the SMC socket belongs.
VLAN
tbd.
RETURN CODES
Successful smcss commands return 0 and display the requested socket state table or link
group information. If an error occurs, smcss writes a message to stderr and completes
with a return code other than 0.
SEE ALSO
af_smc(7), smc_chk(8) smc_rnics(8), smc_run(8), smc_pnet(8), smcd(8), smcr(8)