SMC Tools

Utilities for use with AF_SMC sockets.

This package consists of the following tools:

• libsmc-preload.so : preload library.
• smc : List linkgroups, links, devices, and more
• smc_chk : SMC support diagnostics
• smc_pnet : C program for PNET Table handling
• smc_rnics : List available RDMA NICs
• smc_run : preload library environment setup script.
• smcss : C program for displaying the information about active SMC sockets.

The preload shared library libsmc-preload.so provides mapping of TCP socket operations to SMC sockets. The environment setup script smc_run sets up the preload environment for the libsmc-preload.so shared library before starting application. The smcss program is used to gather and display information about the SMC sockets. The smc_pnet program is used to create, destroy, and change the SMC-R PNET table.

In addition the package contains the AF_SMC manpage (man af_smc).

License

See LICENSE.

Code Contributions

See CONTRIBUTING.md.

Release History:

• v1.8.5 (2025-07-16)

  Changes:

  • smc_rnics: Add support for Network Express RNIC in smc_rnics
  • smc_rnics: Add PFT and VF columns to smc_rnics output

  Bug fixes:

  • libnetlink..: Fix function declaration to use a void prototype
  • smc_rnics: Update smc_chk to extract PNetID from column 9
  • man pages: Update man page for --rawids option and PFT and VF columns
  • smc_rnics: Fix missing PPrt values in smc_rnics -r output

• v1.8.4 (2024-12-17)

  Changes:

  • smcd/smcr statistics: add statistics on sndbufs/RMBs usage

  Bug fixes:

  • smc_rnics: Fix smc_rnics showing the wrong physical port
  • util.h: Fix build with CFLAGS="-g"
  • smc_run: Fix segfault issue during creating concurrent sockets
  • Makefile: Make sure to show the right release number

• v1.8.3 (2023-07-28)

  Bug fixes:

  • Makefile: Adjust default library path for Ubuntu
  • smc_stats: Fix man page name

• v1.8.2 (2022-09-26)

  Bug fixes:

  • smc_run: Fix for single quotes in parameters
  • Makefile: Fix target check
  • smcss/smc_pnet: Fix option --version
  • smcr/smc_dbg: Fix for showing the correct hardware capabailities for RoCE Express3 cards

• v1.8.1 (2022-04-14)

  Changes:

  • smc_rnics: Recognize RoCE Express3 cards

• v1.8.0 (2022-04-11)

  Changes:

  • smc_dbg: Add stats and smc info output
  • smc_rnics:
    • List unknown devices with option -a
    • Include software-set PNET IDs
  • smc_chk: Indicate PNET IDs set by smc_pnet.

  Bug fixes:

  • smc_rnics: Display correct PNET ID for unknown Mellanox cards
  • smc_run: Fix output of version info

• v1.7.0 (2021-10-29)

  Changes:

  • Add support for SMC-Rv2
  • smcd/smcr: Add support for new commands seid and ueid to manage system and user EIDs

• v1.6.1 (2021-10-01)

  Bug fixes:

  • smcd/smcr statistics:
    • Fix memory overread in is_data_consistent()
    • Fix memory and file handle leaks
    • Use correct fallback counter values after reset

• v1.6.0 (2021-07-01)

  Changes:

  • smcd/smcr: Add new command stats
  • smc_rnics: Recognize unknown Mellanox cards
  • smc_run: Add various command-line switches

  Bug fixes:

  • smc_chk: Remove 'EXPERIMENTAL' flag
  • smc_chk: Improve cleanup
  • smc_chk: Start server with intended port
  • Makefile: Install smc_chk.8 on s390 only
  • Makefile: Fix extra compile flags handling
  • smc_rnics: Handle malformed FID arguments

• v1.5.0 (2021-01-29)

  Changes:

  • smcd/smcr: Add new command info
  • smc_rnics: Use n/a to indicate missing PNET ID
  • smc_chk: New tool to perform SMC eligilibilty checks, requires man and python3 to be installed
  • man pages: Consistency improvements

  Bug fixes:

  • smc_pnet.8: Use correct spelling for 'PNET ID'
  • smc_rnics: Suppress output of port attribute for offline devices

• v1.4.0 (2020-11-03)

  Changes:

  • Add SMC-Dv2 support
  • smc: Add new tools smcd and smcr to list linkgroups, links and devices. Requires Linux kernel 5.11 or higher.
  • smc_rnics: Display enabled devices per default, add new option --all
  • smc_rnics: Sort output by FID

  Bug fixes:

  • smc_rnics/smc_dbg: Fix PNETID for multiport devices
  • smcss/smc_pnet: Consistent use of option -v

• v1.3.1 (2020-09-14)

  Changes:

  • smcss: Add further error codes to man page

  Bug fixes:

  • smcss: Display more than 321 connections
  • smc_rnics: Suppress any unknown non-networking device unless option -r is specified

• v1.3.0 (2020-06-16)

  Changes:

  • smcss: Add description of Linux error codes to man page
  • smc_rnics:
    • Sort output by PCHID
    • Replace spaces in output by underscores for easier parsing
    • Add new option --IB-dev to display IB-specific attributes

  Bug fixes:

  • smc_rnics:
    • FIDs can have up to 4 digits and are planned to be extended to a total of 8 digits - adjusting output format accordingly
    • Do not display port attribute for RoCE Express2 devices unless we have an accurate value

• v1.2.2 (2019-10-24) Changes:

  • Add bash autocompletion support
  • Makefile: Drop 31 Bit install due to rpmbuild conflict

  Bug fixes:

  • smcss: Do not show connection mode for already closed sockets
  • smc_rnics: Set interface to "n/a" for ISM devices

• v1.2.1 (2019-04-15) Bug fixes:

  • smc_rnics: Install man page on s390 only
  • libsmc..: Handle behavior flags in type argument to socket() call
  • Makefile: Fixed install target on Ubuntu for platforms other than s390
  • smc_pnet: Changes in support of kernel 5.1

• v1.2.0 (2019-02-08) Changes:

  • smc_rnics: Initial version added
  • smc_dbg: Initial version added

  Bug fixes:

  • smcss: Parse address family of ip address

• v1.1.0 (2018-06-29) Changes:

  • smcss: Add IPv6 support
  • libsmc..: Add IPv6 support
  • smcss: Output format changed
  • libsmc..: Rename preload library to libsmc-preload.so
  • Makefile: Improve distro compatibility
  • Makefile: Add SONAME to shared libraries
  • Makefile: Do not strip binaries on install
  • Makefile: Use LDFLAGS to allow addition of externally set link flags
  • libsmc..: Remove hardcoded reference to libc
  • Manpages: Formatting changes

  Bug fixes:

  • Makefile: Fix target install dependencies
  • smcss: Fix --version output
  • smc_pnet: Fix --version output
  • smc_run: Append preload library to LD_PRELOAD instead of potentially overwriting pre-set values
  • libsmc..: Set suid flag to work with suid executables

• v1.0.0 (2017-02-13) The initial version

Copyright IBM Corp. 2016, 2020