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path: root/net/smc/smc_core.h
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2020-05-05net/smc: log important pnetid and state change eventsKarsten Graul1-1/+1
Print to system log when SMC links are available or go down, link group state changes or pnetids are applied to and removed from devices. The log entries are triggered by either user configuration actions or adapter activation/deactivation events and are not expected to happen often. The entries help SMC users to keep track of the SMC link group status and to detect when actions are needed (like to add replacements for failed adapters). Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-04net/smc: save SMC-R peer link_uidKarsten Graul1-0/+1
During SMC-R link establishment the peers exchange the link_uid that is used for debugging purposes. Save the peer link_uid in smc_link so it can be retrieved by the smc_diag netlink interface. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-04net/smc: create improved SMC-R link_uidKarsten Graul1-1/+3
The link_uid of an SMC-R link is exchanged between SMC peers and its value can be used for debugging purposes. Create a unique link_uid during link initialization and use it in communication with SMC-R peers. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-04net/smc: add termination reason and handle LLC protocol violationKarsten Graul1-0/+2
Allow to set the reason code for the link group termination, and set meaningful values before termination processing is triggered. This reason code is sent to the peer in the final delete link message. When the LLC request or response layer receives a message type that was not handled, drop a warning and terminate the link group. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-04net/smc: asymmetric link taggingKarsten Graul1-0/+4
New connections must not be assigned to asymmetric links. Add asymmetric link tagging using new link variable link_is_asym. The new helpers smcr_lgr_set_type() and smcr_lgr_set_type_asym() are called to set the state of the link group, and tag all links accordingly. smcr_lgr_conn_assign_link() respects the link tagging and will not assign new connections to links tagged as asymmetric link. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-04net/smc: wait for departure of an IB messageKarsten Graul1-0/+1
Introduce smc_wr_tx_send_wait() to send an IB message and wait for the tx completion event of the message. This makes sure that the message is no longer in-flight when the function returns. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-04net/smc: switch connections to alternate linkKarsten Graul1-0/+2
Add smc_switch_conns() to switch all connections from a link that is going down. Find an other link to switch the connections to, and switch each connection to the new link. smc_switch_cursor() updates the cursors of a connection to the state of the last successfully sent CDC message. When there is no link to switch to, terminate the link group. Call smc_switch_conns() when a link is going down. And with the possibility that links of connections can switch adapt CDC and TX functions to detect and handle link switches. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-04net/smc: llc_del_link_work and use the LLC flow for delete linkKarsten Graul1-1/+1
Introduce a work that is scheduled when a new DELETE_LINK LLC request is received. The work will call either the SMC client or SMC server DELETE_LINK processing. And use the LLC flow framework to process incoming DELETE_LINK LLC messages, scheduling the llc_del_link_work for those events. With these changes smc_lgr_forget() is only called by one function and can be migrated into smc_lgr_cleanup_early(). Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-04net/smc: first part of add link processing as SMC clientKarsten Graul1-0/+2
First set of functions to process an ADD_LINK LLC request as an SMC client. Find an alternate IB device, determine the new link group type and get the index for the new link. Then ready the link, map the buffers and send an ADD_LINK LLC response. If any error occurs, send a reject LLC message and terminate the processing. Add smc_llc_alloc_alt_link() to find a free link index for a new link, depending on the new link group type. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: llc_add_link_work to handle ADD_LINK LLC requestsKarsten Graul1-0/+1
Introduce a work that is scheduled when a new ADD_LINK LLC request is received. The work will call either the SMC client or SMC server ADD_LINK processing. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: allocate index for a new linkKarsten Graul1-1/+1
Add smc_llc_alloc_alt_link() to find a free link index for a new link, depending on the new link group type. And update constants for the maximum number of links to 3 (2 symmetric and 1 dangling asymmetric link). These maximum numbers are the same as used by other implementations of the SMC-R protocol. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: add smcr_port_err() and smcr_link_down() processingKarsten Graul1-1/+5
Call smcr_port_err() when an IB event reports an inactive IB device. smcr_port_err() calls smcr_link_down() for all affected links. smcr_link_down() either triggers the local DELETE_LINK processing, or sends an DELETE_LINK LLC message to the SMC server to initiate the processing. The old handler function smc_port_terminate() is removed. Add helper smcr_link_down_cond() to take a link down conditionally, and smcr_link_down_cond_sched() to schedule the link_down processing to a work. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: add smcr_port_add() and smcr_link_up() processingKarsten Graul1-0/+1
Call smcr_port_add() when an IB event reports a new active IB device. smcr_port_add() will start a work which either triggers the local ADD_LINK processing, or send an ADD_LINK LLC message to the SMC server to initiate the processing. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: remember PNETID of IB device for later device matchingKarsten Graul1-0/+2
The PNETID is needed to find an alternate link for a link group. Save the PNETID of the link that is used to create the link group for later device matching. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: mutex to protect the lgr against parallel reconfigurationsKarsten Graul1-0/+2
Introduce llc_conf_mutex in the link group which is used to protect the buffers and lgr states against parallel link reconfiguration. This ensures that new connections do not start to register buffers with the links of a link group when link creation or termination is running. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: map and register buffers for a new linkKarsten Graul1-0/+2
Introduce support to map and register all current buffers for a new link. smcr_buf_map_lgr() will map used buffers for a new link and smcr_buf_reg_lgr() can be called to register used buffers on the IB device of the new link. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: unmapping of buffers to support multiple linksKarsten Graul1-0/+1
With the support of multiple links that are created and cleared there is a need to unmap one link from all current buffers. Add unmapping by link and by rmb. And make smcr_link_clear() available to be called from the LLC layer. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-05-02net/smc: multiple link support for rmb buffer registrationKarsten Graul1-0/+1
The CONFIRM_RKEY LLC processing handles all links in one LLC message. Move the call to this processing out of smcr_link_reg_rmb() which does processing per link, into smcr_lgr_reg_rmbs() which is responsible for link group level processing. Move smcr_link_reg_rmb() into module smc_core.c. >From af_smc.c now call smcr_lgr_reg_rmbs() to register new rmbs on all available links. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/smc: remove obsolete link state DELETINGKarsten Graul1-1/+0
The connection layer in af_smc.c is now using the new LLC flow framework, which made the link state DELETING obsolete. Remove the state and the respective helpers. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/smc: new smc_rtoken_set functions for multiple link supportKarsten Graul1-0/+4
Introduce smc_rtoken_set() to set the rtoken for a new link to an existing rmb whose rtoken is given, and smc_rtoken_set2() to set an rtoken for a new link whose link_id is given. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/smc: multiple link support and LLC flow for smc_llc_do_delete_rkeyKarsten Graul1-3/+0
Adapt smc_llc_do_delete_rkey() to use the LLC flow and support multiple links when deleting the rkeys for rmb buffers at the peer. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/smc: multiple link support and LLC flow for smc_llc_do_confirm_rkeyKarsten Graul1-2/+0
Adapt smc_llc_do_confirm_rkey() to use the LLC flow and support the rkeys of multiple links when the CONFIRM_RKEY LLC message is build. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/smc: adapt SMC client code to use the LLC flowKarsten Graul1-3/+0
Change the code that processes the SMC client part of connection establishment to use the LLC flow framework (CONFIRM_LINK request messages). Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/smc: adapt SMC server code to use the LLC flowKarsten Graul1-3/+0
Change the code that processes the SMC server part of connection establishment to use the LLC flow framework (CONFIRM_LINK response messages). Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/smc: introduce link group typeKarsten Graul1-0/+10
Add a type field to the link group which reflects the current link group redundancy state. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-30net/smc: add event-based llc_flow frameworkKarsten Graul1-0/+24
The new framework allows to start specific types of LLC control flows, protects active flows and makes it possible to wait for flows to finish before starting a new flow. This mechanism is used for the LLC control layer to model flows like 'add link' or 'delete link' which need to send/receive several LLC messages and are not allowed to get interrupted by the wrong type of messages. 'Add link' or 'Delete link' messages arriving in the middle of a flow are delayed and processed when the current flow finished. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: move llc layer related init and clear into smc_llc.cKarsten Graul1-0/+2
Introduce smc_llc_lgr_init() and smc_llc_lgr_clear() to implement all llc layer specific initialization and cleanup in module smc_llc.c. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: use mutex instead of rwlock_t to protect buffersKarsten Graul1-2/+2
The locks for sndbufs and rmbs are never used from atomic context. Using a mutex for these locks will allow to nest locks with other mutexes. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: process llc responses in tasklet contextKarsten Graul1-4/+4
When llc responses are received then possible waiters for this response are to be notified. This can be done in tasklet context, without to use a work in the llc work queue. Move all code that handles llc responses into smc_llc_rx_response(). Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: use worker to process incoming llc messagesKarsten Graul1-1/+6
Incoming llc messages are processed in irq tasklet context, and a worker is used to send outgoing messages. The worker is needed because getting a send buffer could result in a wait for a free buffer. To make sure all incoming llc messages are processed in a serialized way introduce an event queue and create a new queue entry for each message which is queued to this event queue. A new worker processes the event queue entries in order. And remove the use of a separate worker to send outgoing llc messages because the messages are processed in worker context already. With this event queue the serialized llc_wq work queue is obsolete, remove it. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: add new link state and related helpersKarsten Graul1-0/+9
Before a link can be reused it must have been cleared. Lowest current link state is INACTIVE, which does not mean that the link is already cleared. Add a new state UNUSED that is set when the link is cleared and can be reused. Add helper smc_llc_usable_link() to find an active link in a link group, and smc_link_usable() to determine if a link is usable. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: multi-link support for smc_rmb_rtoken_handling()Karsten Graul1-1/+1
Extend smc_rmb_rtoken_handling() and smc_rtoken_delete() to support multiple links. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: convert static link ID instances to support multiple linksKarsten Graul1-15/+22
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: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: convert static link ID to dynamic referencesKarsten Graul1-3/+4
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: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-29net/smc: introduce link_idx for link group arrayKarsten Graul1-0/+2
The link_id is the index of the link in the array of the link group. When a link in the array is reused for a new link, a different unique link_id should be used, otherwise the index in the array could collide with the previous link at this array position. Use a new variable link_idx as array index, and make link_id an increasing unique id value. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Reviewed-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-28Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netDavid S. Miller1-1/+1
The mptcp conflict was overlapping additions. The SMC conflict was an additional and removal happening at the same time. Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-27net/smc: fix cleanup for linkgroup setup failuresUrsula Braun1-1/+1
If an SMC connection to a certain peer is setup the first time, a new linkgroup is created. In case of setup failures, such a linkgroup is unusable and should disappear. As a first step the linkgroup is removed from the linkgroup list in smc_lgr_forget(). There are 2 problems: smc_listen_decline() might be called before linkgroup creation resulting in a crash due to calling smc_lgr_forget() with parameter NULL. If a setup failure occurs after linkgroup creation, the connection is never unregistered from the linkgroup, preventing linkgroup freeing. This patch introduces an enhanced smc_lgr_cleanup_early() function which * contains a linkgroup check for early smc_listen_decline() invocations * invokes smc_conn_free() to guarantee unregistering of the connection. * schedules fast linkgroup removal of the unusable linkgroup And the unused function smcd_conn_free() is removed from smc_core.h. Fixes: 3b2dec2603d5b ("net/smc: restructure client and server code in af_smc") Fixes: 2a0674fffb6bc ("net/smc: improve abnormal termination of link groups") Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-18net/smc: simplify normal link terminationKarsten Graul1-7/+1
smc_lgr_terminate() and smc_lgr_terminate_sched() both result in soft link termination, smc_lgr_terminate_sched() is scheduling a worker for this task. Take out complexity by always using the termination worker and getting rid of smc_lgr_terminate() completely. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-18net/smc: remove unused parameter of smc_lgr_terminate()Karsten Graul1-1/+1
The soft parameter of smc_lgr_terminate() is not used and obsolete. Remove it. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-16net/smc: introduce bookkeeping of SMCR link groupsUrsula Braun1-0/+1
If the smc module is unloaded return control from exit routine only, if all link groups are freed. If an IB device is thrown away return control from device removal only, if all link groups belonging to this device are freed. Counters for the total number of SMCR link groups and for the total number of SMCR links per IB device are introduced. smc module unloading continues only if the total number of SMCR link groups is zero. IB device removal continues only it the total number of SMCR links per IB device has decreased to zero. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-15net/smc: immediate termination for SMCR link groupsUrsula Braun1-1/+2
If the SMC module is unloaded or an IB device is thrown away, the immediate link group freeing introduced for SMCD is exploited for SMCR as well. That means SMCR-specifics are added to smc_conn_kill(). Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-15net/smc: abnormal termination of SMCD link groupsUrsula Braun1-1/+2
A final cleanup due to SMCD device removal means immediate freeing of all link groups belonging to this device in interrupt context. This patch introduces a separate SMCD link group termination routine, which terminates all link groups of an SMCD device. This new routine smcd_terminate_all ()is reused if the smc module is unloaded. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-11-15net/smc: fix final cleanup sequence for SMCD devicesUrsula Braun1-0/+2
If peer announces shutdown, use the link group terminate worker for local cleanup of link groups and connections to terminate link group in proper context. Make sure link groups are cleaned up first before destroying the event queue of the SMCD device, because link group cleanup may raise events. Send signal shutdown only if peer has not done it already. Send socket abort or close only, if peer has not already announced shutdown. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-10-22net/smc: introduce link group termination workerUrsula Braun1-0/+7
Use a worker for link group termination to guarantee process context. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
2019-10-22net/smc: improve link group freeingUrsula Braun1-0/+2
Usually link groups are freed delayed to enable quick connection creation for a follow-on SMC socket. Terminated link groups are freed faster. This patch makes sure, fast schedule of link group freeing is not rescheduled by a delayed schedule. And it makes sure link group freeing is not rescheduled, if the real freeing is already running. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
2019-04-12net/smc: improve smc_conn_create reason codesKarsten Graul1-0/+1
Rework smc_conn_create() to always return a valid DECLINE reason code. This removes the need to translate the return codes on 4 different places and allows to easily add more detailed return codes by changing smc_conn_create() only. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-12net/smc: consolidate function parametersKarsten Graul1-5/+19
During initialization of an SMC socket a lot of function parameters need to get passed down the function call path. Consolidate the parameters in a helper struct so there are less enough parameters to get all passed by register. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-02-04net/smc: preallocated memory for rdma work requestsUrsula Braun1-0/+20
The work requests for rdma writes are built in local variables within function smc_tx_rdma_write(). This violates the rule that the work request storage has to stay till the work request is confirmed by a completion queue response. This patch introduces preallocated memory for these work requests. The storage is allocated, once a link (and thus a queue pair) is established. Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-11-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-2/+3
2018-11-24net/smc: unregister rkeys of unused bufferKarsten Graul1-1/+1
When an rmb is no longer in use by a connection, unregister its rkey at the remote peer with an LLC DELETE RKEY message. With this change, unused buffers held in the buffer pool are no longer registered at the remote peer. They are registered before the buffer is actually used and unregistered when they are no longer used by a connection. Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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