New subject: [PATCH OLK-5.10 001/124] net/smc: improve return codes for SMC-Dv2

26 May 2025

      Albert Huang (1):
  net/smc: fix smc clc failed issue when netdevice not in init_net

Allen Pais (1):
  net: smc: convert tasklets to use new tasklet_setup() API

Christophe JAILLET (1):
  net/smc: Use the bitmap API when applicable

Colin Ian King (1):
  net/smc: remove redundant re-assignment of pointer link

D. Wythe (5):
  net/smc: Limit backlog connections
  net/smc: reduce unnecessary blocking in smcr_lgr_reg_rmbs()
  net/smc: fix potential panic dues to unprotected
    smc_llc_srv_add_link()
  net/smc: fix dangling sock under state SMC_APPFINCLOSEWAIT
  net/smc: return ETIMEDOUT when smc_connect_clc() timeout

Dan Carpenter (2):
  net/smc: Fix an error code in smc_lgr_create()
  net/smc: delete pointless divide by one

David Howells (1):
  smc: Drop smc_sendpage() in favour of smc_sendmsg() + MSG_SPLICE_PAGES

Dmitry Antipov (1):
  net: smc: fix spurious error message from __sock_release()

Dust Li (2):
  net/smc: add comments for smc_link_{usable|sendable}
  net/smc: return the right falback reason when prefix checks fail

Eric Dumazet (2):
  net: inline sock_prot_inuse_add()
  net: make sock_inuse_add() available

Gerd Bayer (2):
  net/smc: Fix dependency of SMC on ISM
  s390/ism: ism driver implies smc protocol

Guangguan Wang (14):
  net/smc: support smc release version negotiation in clc handshake
  net/smc: add vendor unique experimental options area in clc handshake
  net/smc: support smc v2.x features validate
  net/smc: support max connections per lgr negotiation
  net/smc: support max links per lgr negotiation in clc handshake
  net/smc: Extend SMCR v2 linkgroup netlink attribute
  net/smc: set rmb's SG_MAX_SINGLE_ALLOC limitation only when
    CONFIG_ARCH_NO_SG_CHAIN is defined
  net/smc: protect link down work from execute after lgr freed
  net/smc: check sndbuf_space again after NOSPACE flag is set in
    smc_poll
  net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving
    proposal msg
  net/smc: check smcd_v2_ext_offset when receiving proposal msg
  net/smc: check return value of sock_recvmsg when draining clc data
  net/smc: fix data error when recvmsg with MSG_PEEK flag
  net/smc: use the correct ndev to find pnetid by pnetid table

Gustavo A. R. Silva (1):
  net/smc: Avoid -Wflex-array-member-not-at-end warnings

Guvenc Gulce (1):
  net/smc: Use active link of the connection

Heiko Carstens (1):
  net/smc: Eliminate struct smc_ism_position

Jiapeng Chong (1):
  net/smc: Remove redundant assignment to rc

Julian Ruess (2):
  s390/ism: Fix trying to free already-freed IRQ by repeated
    ism_dev_exit()
  s390/ism: add release function for struct device

Julian Wiedmann (1):
  net/smc: no need to flush smcd_dev's event_wq before destroying it

Kai Shen (2):
  net/smc: Use percpu ref for wr tx reference
  net/smc: Fix memory leak when using percpu refs

Karsten Graul (16):
  net/smc: improve return codes for SMC-Dv2
  net/smc: use helper smc_conn_abort() in listen processing
  net/smc: avoid possible duplicate dmb unregistration
  net/smc: add support for user defined EIDs
  net/smc: keep static copy of system EID
  net/smc: add generic netlink support for system EID
  net/smc: save stack space and allocate smc_init_info
  net/smc: prepare for SMC-Rv2 connection
  net/smc: add SMC-Rv2 connection establishment
  net/smc: add listen processing for SMC-Rv2
  net/smc: add v2 format of CLC decline message
  net/smc: retrieve v2 gid from IB device
  net/smc: add v2 support to the work request layer
  net/smc: extend LLC layer for SMC-Rv2
  net/smc: add netlink support for SMC-Rv2
  net/smc: stop links when their GID is removed

Kuniyuki Iwashima (1):
  smc: Fix use-after-free in tcp_write_timer_handler().

Li RongQing (2):
  net/smc: remove unneeded atomic operations in smc_tx_sndbuf_nonempty
  net/smc: Fix searching in list of known pnetids in smc_pnet_add_pnetid

Niklas Schnelle (3):
  s390/ism: Fix locking for forwarding of IRQs and events to clients
  s390/ism: Fix and simplify add()/remove() callback handling
  s390/ism: Do not unregister clients with registered DMBs

Simon Horman (1):
  net/smc: Address spelling errors

Stefan Raspl (11):
  s390/ism: Cleanups
  net/smc: Pass on DMBE bit mask in IRQ handler
  net/smc: Terminate connections prior to device removal
  s390/ism: Introduce struct ism_dmb
  net/ism: Add new API for client registration
  net/smc: Register SMC-D as ISM client
  net/smc: Separate SMC-D and ISM APIs
  s390/ism: Consolidate SMC-D-related code
  net/smc: De-tangle ism and smc device initialization
  net/smc: Fix device de-init sequence
  net/smc: Introduce explicit check for v2 support

Tony Lu (6):
  net/smc: Clean up local struct sock variables
  net/smc: Introduce net namespace support for linkgroup
  net/smc: Print net namespace in log
  net/smc: Introduce TCP ULP support
  net/smc: Support SO_REUSEPORT
  net/smc: Fix cleanup when register ULP fails

Wan Jiabing (1):
  net: smc: Remove repeated struct declaration

Wen Gu (32):
  net/smc: Reset conn->lgr when link group registration fails
  net/smc: Remove unused function declaration
  net/smc: Reset connection when trying to use SMCRv2 fails.
  net/smc: Scan from current RMB list when no position specified
  net/smc: Don't use RMBs not mapped to new link in SMCRv2 ADD LINK
  net/smc: fix missing byte order conversion in CLC handshake
  net/smc: rename some 'fce' to 'fce_v2x' for clarity
  net/smc: introduce sub-functions for smc_clc_send_confirm_accept()
  net/smc: unify the structs of accept or confirm message for v1 and v2
  net/smc: support SMCv2.x supplemental features negotiation
  net/smc: introduce virtual ISM device support feature
  net/smc: define a reserved CHID range for virtual ISM devices
  net/smc: compatible with 128-bits extended GID of virtual ISM device
  net/smc: support extended GID in SMC-D lgr netlink attribute
  net/smc: disable SEID on non-s390 archs where virtual ISM may be used
  net/smc: manage system EID in SMC stack instead of ISM driver
  net/smc: fix incorrect SMC-D link group matching logic
  net/smc: change the term virtual ISM to Emulated-ISM
  net/smc: decouple ism_client from SMC-D DMB registration
  net/smc: introduce loopback-ism for SMC intra-OS shortcut
  net/smc: implement ID-related operations of loopback-ism
  net/smc: implement DMB-related operations of loopback-ism
  net/smc: mark optional smcd_ops and check for support when called
  net/smc: ignore loopback-ism when dumping SMC-D devices
  net/smc: register loopback-ism into SMC-D device list
  net/smc: add operations to merge sndbuf with peer DMB
  net/smc: {at|de}tach sndbuf to peer DMB if supported
  net/smc: adapt cursor update when sndbuf and peer DMB are merged
  net/smc: implement DMB-merged operations of loopback-ism
  net/smc: fix neighbour and rtable leak in smc_ib_find_route()
  net/smc: avoid overwriting when adjusting sock bufsizes
  net/smc: fix LGR and link use-after-free issue

Wenjia Zhang (1):
  net/smc: Fix lookup of netdev by using ib_device_get_netdev()

Yue Haibing (1):
  net/smc: Remove unused function declarations

Zhengchao Shao (6):
  net/smc: make smc_hash_sk/smc_unhash_sk static
  net/smc: remove unreferenced header in smc_loopback.h file
  net/smc: remove the fallback in __smc_connect
  net/smc: remove redundant code in smc_connect_check_aclc
  net/smc: remove unused input parameters in smcr_new_buf_create
  net/smc: add the max value of fallback reason count

liuyacan (1):
  net/smc: set ini->smcrv2.ib_dev_v2 to NULL if SMC-Rv2 is unavailable

 drivers/s390/net/Kconfig      |   5 +-
 drivers/s390/net/ism.h        |  26 +-
 drivers/s390/net/ism_drv.c    | 489 +++++++++++++-----
 include/linux/ism.h           |  92 ++++
 include/net/smc.h             |  62 +--
 include/net/sock.h            |  24 +-
 include/uapi/linux/smc.h      |  48 +-
 include/uapi/linux/smc_diag.h |   2 +
 net/core/sock.c               |  21 -
 net/mptcp/subflow.c           |   4 +-
 net/smc/Kconfig               |  14 +
 net/smc/Makefile              |   1 +
 net/smc/af_smc.c              | 947 +++++++++++++++++++++++++---------
 net/smc/smc.h                 |  53 +-
 net/smc/smc_cdc.c             |  44 +-
 net/smc/smc_clc.c             | 844 +++++++++++++++++++++++++-----
 net/smc/smc_clc.h             | 192 +++++--
 net/smc/smc_close.c           |   6 +-
 net/smc/smc_core.c            | 390 ++++++++++----
 net/smc/smc_core.h            | 129 ++++-
 net/smc/smc_diag.c            |  20 +-
 net/smc/smc_ib.c              | 171 +++++-
 net/smc/smc_ib.h              |  24 +-
 net/smc/smc_ism.c             | 318 ++++++++----
 net/smc/smc_ism.h             |  61 ++-
 net/smc/smc_llc.c             | 670 +++++++++++++++++++-----
 net/smc/smc_llc.h             |  12 +-
 net/smc/smc_loopback.c        | 427 +++++++++++++++
 net/smc/smc_loopback.h        |  60 +++
 net/smc/smc_netlink.c         |  47 +-
 net/smc/smc_netlink.h         |   2 +
 net/smc/smc_pnet.c            | 120 +++--
 net/smc/smc_rx.c              |  39 +-
 net/smc/smc_rx.h              |   8 +-
 net/smc/smc_stats.c           |   2 +-
 net/smc/smc_stats.h           |   3 +-
 net/smc/smc_tx.c              |  56 +-
 net/smc/smc_tx.h              |   2 -
 net/smc/smc_wr.c              | 305 +++++++++--
 net/smc/smc_wr.h              |  17 +-
 40 files changed, 4502 insertions(+), 1255 deletions(-)
 create mode 100644 include/linux/ism.h
 create mode 100644 net/smc/smc_loopback.c
 create mode 100644 net/smc/smc_loopback.h

-- 
2.34.1

[PATCH OLK-5.10 000/124] Backport SMC-D feature

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participants (2)