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Angus Ainslie
angus.ainslie
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Eric Kuzmenko
eric.kuzmenko
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Evangelos Ribeiro Tzaras
evangelos.tzaras
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Francois Techene
francois.techene
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Guido Gunther
guido.gunther
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JC Staudt
jcstaudt
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Jonathon Hall
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Julian Sparber
julian.sparber
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Martin Kepplinger
martin.kepplinger
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Mohammed Sadiq
mohammed.sadiq
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Richard Kolla
richard.kolla
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Sam Hewitt sam.hewitt
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Sebastian Krzyszkowiak
sebastian.krzyszkowiak
- May 04, 2020
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Karsten Graul authored
When a link goes down and all connections of this link need to be switched to an other link then the producer cursor and the sequence of the last successfully sent CDC message must be known. Add the two fields to the SMC connection and update it in the tx completion handler. And to allow matching of sequences in error cases reset the seqno to the old value in smc_cdc_msg_send() when the actual send failed. Signed-off-by:
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- Apr 29, 2020
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Karsten Graul authored
As a preparation for the support of multiple links remove the usage of a static link id (SMC_SINGLE_LINK) and allow dynamic link ids. Signed-off-by:
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- Oct 22, 2019
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Ursula Braun authored
The resources for a terminated socket are being cleaned up. This patch makes sure * no more data is received for an actively terminated socket * no more data is sent for an actively or passively terminated socket Signed-off-by:
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- Apr 12, 2019
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Ursula Braun authored
For nonblocking sockets move the kernel_connect() from the connect worker into the initial smc_connect part to return kernel_connect() errors other than -EINPROGRESS to user space. Reviewed-by:
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- Feb 21, 2019
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Ursula Braun authored
smc_poll() returns with mask bit EPOLLPRI if the connection urg_state is SMC_URG_VALID. Since SMC_URG_VALID is zero, smc_poll signals EPOLLPRI errorneously if called in state SMC_INIT before the connection is created, for instance in a non-blocking connect scenario. This patch switches to non-zero values for the urg states. Reviewed-by:
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- Dec 19, 2018
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Myungho Jung authored
clcsock can be released while kernel_accept() references it in TCP listen worker. Also, clcsock needs to wake up before released if TCP fallback is used and the clcsock is blocked by accept. Add a lock to safely release clcsock and call kernel_sock_shutdown() to wake up clcsock from accept in smc_release(). Reported-by:
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- Jul 26, 2018
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Karsten Graul authored
Remember the fallback reason code and the peer diagnosis code for smc sockets, and provide them in smc_diag.c to the netlink interface. And add more detailed reason codes. Signed-off-by:
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- Jun 30, 2018
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Hans Wippel authored
The data transfer and CDC message headers differ in SMC-R and SMC-D. This patch adds support for the SMC-D data transfer to the existing SMC code. It consists of the following: * SMC-D CDC support * SMC-D tx support * SMC-D rx support The CDC header is stored at the beginning of the receive buffer. Thus, a rx_offset variable is added for the CDC header offset within the buffer (0 for SMC-R). Signed-off-by:
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Ursula Braun authored
For SMC it is important to know the current port state of RoCE devices. Monitoring port states has been triggered, when a RoCE device was added to the pnet table. To support future alternatives to the pnet table the monitoring of ports is made independent of the existence of a pnet table. It starts once the smc_ib_device is established. Due to this change smc_ib_remember_port_attr() is now a local function and shuffling its location and the location of its used functions makes any forward references obsolete. And the duplicate SMC_MAX_PORTS definition is removed. Signed-off-by:
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- Jun 28, 2018
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Ursula Braun authored
The recent poll change may lead to stalls for non-blocking connecting SMC sockets, since sock_poll_wait is no longer performed on the internal CLC socket, but on the outer SMC socket. kernel_connect() on the internal CLC socket returns with -EINPROGRESS, but the wake up logic does not work in all cases. If the internal CLC socket is still in state TCP_SYN_SENT when polled, sock_poll_wait() from sock_poll() does not sleep. It is supposed to sleep till the state of the internal CLC socket switches to TCP_ESTABLISHED. This problem triggered a redesign of the SMC nonblocking connect logic. This patch introduces a connect worker covering all connect steps followed by a wake up of socket waiters. It allows to get rid of all delays and locks in smc_poll(). Fixes: c0129a06 ("smc: convert to ->poll_mask") Signed-off-by:
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- May 23, 2018
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Stefan Raspl authored
Add support for out of band data send and receive. Signed-off-by:
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- May 18, 2018
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Hans Wippel authored
SMC connection and buffer handling belong to smc_core. So, this patch moves this code from smc.h to smc_core. Signed-off-by:
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Hans Wippel authored
Currently, the write offset within the RMB is calculated on each write operation although it is fixed for each connection. With this patch, the offset is calculated once and stored in a connection specific variable. Signed-off-by:
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Hans Wippel authored
The connection index is actually a RMBE index. So, this patch changes the name accordingly. Signed-off-by:
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Hans Wippel authored
In addition to the buffer references, SMC currently stores the sizes of the receive and send buffers in each connection as separate variables. This patch introduces a buffer length variable in the common buffer descriptor and uses this length instead. Signed-off-by:
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- May 04, 2018
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Stefan Raspl authored
Provide an implementation for splice() when we are using SMC. See smc_splice_read() for further details. Signed-off-by:
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- Apr 27, 2018
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Ursula Braun authored
If sockopt TCP_DEFER_ACCEPT is set, the accept is delayed till data is available. Signed-off-by:
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- Mar 16, 2018
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Karsten Graul authored
Add ipv6 support to the smc socket layer functions. Make use of the updated clc layer functions to retrieve and match ipv6 information. The indicator for ipv4 or ipv6 is the protocol constant that is provided in the socket() call with address family AF_SMC. Based-on-patch-by:
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- Mar 01, 2018
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Karsten Graul authored
The daddr field holds the destination IPv4 address. The field was set but never used and can be removed. The addr field was a left-over from an earlier version of non-blocking connects and can be removed. The result of the call to kernel_getpeername is not used, the call can be removed. Non-blocking connects are working, so remove restriction comment. Signed-off-by:
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Karsten Graul authored
The function smc_netinfo_by_tcpsk() belongs to CLC handling. Move it to smc_clc.c and rename to smc_clc_netinfo_by_tcpsk. Signed-off-by:
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- Jan 26, 2018
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Gustavo A. R. Silva authored
Return statements in functions returning bool should use true/false instead of 1/0. This issue was detected with the help of Coccinelle. Signed-off-by:
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Ursula Braun authored
Proper socket refcounting makes the sock_put worker obsolete. Signed-off-by:
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- Nov 02, 2017
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Greg Kroah-Hartman authored
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard...
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- Sep 21, 2017
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Ursula Braun authored
The number of outstanding work requests is limited. If all work requests are in use, tx processing is postponed to another scheduling of the tx worker. Switch to a delayed worker to have a gap for tx completion queue events before the next retry. Signed-off-by:
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- Apr 12, 2017
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Ursula Braun authored
Several state changes occur during SMC socket closing. Currently state changes triggered locally occur in process context with lock_sock() taken while state changes triggered by peer occur in tasklet context with bh_lock_sock() taken. bh_lock_sock() does not wait till a lock_sock(() task in process context is finished. This may lead to races in socket state transitions resulting in dangling SMC-sockets, or it may lead to duplicate SMC socket freeing. This patch introduces a closing worker to run all state changes under lock_sock(). Signed-off-by:
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- Jan 09, 2017
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Ursula Braun authored
Support for SMC socket monitoring via netlink sockets of protocol NETLINK_SOCK_DIAG. Signed-off-by:
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Ursula Braun authored
smc_shutdown() and smc_release() handling delayed linkgroup cleanup for linkgroups without connections Signed-off-by:
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Ursula Braun authored
move RMBE data into user space buffer and update managing cursors Signed-off-by:
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Ursula Braun authored
copy data to kernel send buffer, and trigger RDMA write Signed-off-by:
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Ursula Braun authored
send and receive CDC messages (via IB message send and CQE) Signed-off-by:
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Ursula Braun authored
Prepare the link for RDMA transport: Create a queue pair (QP) and move it into the state Ready-To-Receive (RTR). Signed-off-by:
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Ursula Braun authored
The base containers for RDMA transport are work requests and completion queue entries processed through Infiniband verbs: * allocate and initialize these areas * map these areas to DMA * implement the basic communication consisting of work request posting and receival of completion queue events Signed-off-by:
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Ursula Braun authored
* allocate data RMB memory for sending and receiving * size depends on the maximum socket send and receive buffers * allocated RMBs are kept during life time of the owning link group * map the allocated RMBs to DMA Signed-off-by:
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Ursula Braun authored
* create smc_connection for SMC-sockets * determine suitable link group for a connection * create a new link group if necessary Signed-off-by:
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Ursula Braun authored
* CLC (Connection Layer Control) handshake Signed-off-by:
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Ursula Braun authored
* create a list of SMC IB-devices Signed-off-by:
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Ursula Braun authored
* enable smc module loading and unloading * register new socket family * basic smc socket creation and deletion * use backing TCP socket to run CLC (Connection Layer Control) handshake of SMC protocol * Setup for infiniband traffic is implemented in follow-on patches. For now fallback to TCP socket is always used. Signed-off-by:
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