This patch series prepares the SMC code for the implementation of SMC-R link failover capabilities which are still missing to reach full compliance with RFC 7609. The code changes are separated into 65 patches which together form the new functionality. I tried to create meaningful patches which allow to follow the implementation. Question: how to handle the remaining 52 patches? All of them are needed for link failover to work and should make it into the same merge window. Can I send them all together? The SMC-R implementation will transparently make use of the link failover feature when matching RoCE devices are available, no special setup is required. All RoCE devices with the same PNET ID as the TCP device (hardware-defined or user-defined via the smc_pnet tool) are candidates to get used to form a link in a link group. When at least 2 RoCE devices are available on both communication endpoints then a symmetric link group is formed, meaning the link group has 2 independent links. If one RoCE device goes down then all connections on this link are moved to the surviving link. Upon recovery of the failing device or availability of a new one, the symmetric link group will be restored. Karsten Graul (13): net/smc: rework pnet table to support SMC-R failover net/smc: separate function for link initialization net/smc: introduce link_idx for link group array net/smc: convert static link ID to dynamic references net/smc: convert static link ID instances to support multiple links net/smc: multi-link support for smc_rmb_rtoken_handling() net/smc: add new link state and related helpers net/smc: move testlink work to system work queue net/smc: simplify link deactivation net/smc: use worker to process incoming llc messages net/smc: process llc responses in tasklet context net/smc: use mutex instead of rwlock_t to protect buffers net/smc: move llc layer related init and clear into smc_llc.c net/smc/af_smc.c | 79 ++++--- net/smc/smc.h | 1 + net/smc/smc_cdc.c | 8 +- net/smc/smc_clc.c | 12 +- net/smc/smc_clc.h | 1 + net/smc/smc_core.c | 542 +++++++++++++++++++++++++++++---------------- net/smc/smc_core.h | 78 ++++--- net/smc/smc_ib.c | 63 +++--- net/smc/smc_ib.h | 10 +- net/smc/smc_ism.c | 3 +- net/smc/smc_llc.c | 396 ++++++++++++++++++--------------- net/smc/smc_llc.h | 16 +- net/smc/smc_pnet.c | 539 +++++++++++++++++++++++++------------------- net/smc/smc_pnet.h | 2 + net/smc/smc_tx.c | 13 +- net/smc/smc_wr.c | 2 +- 16 files changed, 1063 insertions(+), 702 deletions(-) -- 2.17.1
