Section 8 · System administration
smcss.8
Package: smc-tools
SMCSS
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
OUTPUT
RETURN CODES
SEE ALSO
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. TokenUnique ID of the SMC socket connection.SndbufSize of the to-be-sent window of the SMC socket connection.RcvbufSize of the receiving window of the SMC socket connection (filled by peer).PeerbufSize of the peer receiving window of the SMC socket connection (to fill during RDMA-transfer).rxprod-CursorDescribes the current cursor location of the "Rcvbuf" for data to be received from the peer.rxcons-CursorDescribes the current cursor location of the "Peerbuf" for data sent to peer and confirmed by the peer.rxFlagsSMC socket connection flags set by and received from the peer.txprod-CursorDescribes the current cursor location of the "Peerbuf" for data sent to peer.txcons-CursorDescribes the current cursor location of the "Rcvbuf" for data received from the peer and confirmed to the peer.txFlagsSMC socket connection flags set locally and sent to the peer.txprep-CursorDescribes the current cursor location of the "Sndbuf" for data to be sent. The data is to be moved to the "Peerbuf".txsent-CursorDescribes the current cursor location of the "Sndbuf" for data sent. The data was moved to the "Peerbuf".txfin-CursorDescribes 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-DeviceName of the RoCE device used by the link group to which the SMC socket belongs.PortPort of the RoCE device used by the link group to which the SMC socket belongs.LinkidUnique link ID of the link within the link group to which the SMC socket belongs.GIDGid of the RoCE port used by the link group to which the SMC socket belongs.Peer-GIDGid of the Foreign RoCE port used by the link group to which the SMC socket belongs.VLANtbd. |
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)