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Updated: Thursday, June 13, 2019
 
 

ibv_post_srq_recv (3)

Name

ibv_post_srq_recv - post a list of work requests (WRs) to a shared receive queue (SRQ)

Synopsis

#include <infiniband/verbs.h>

int ibv_post_srq_recv(struct ibv_srq *srq, struct ibv_recv_wr *wr,
struct ibv_recv_wr **bad_wr);

Description

Libibverbs Programmer's Manual                            IBV_POST_SRQ_RECV(3)



NAME
       ibv_post_srq_recv  -  post  a  list  of work requests (WRs) to a shared
       receive queue (SRQ)

SYNOPSIS
       #include <infiniband/verbs.h>

       int ibv_post_srq_recv(struct ibv_srq *srq, struct ibv_recv_wr *wr,
                             struct ibv_recv_wr **bad_wr);

DESCRIPTION
       ibv_post_srq_recv() posts the linked list of work requests (WRs) start-
       ing with wr to the shared receive queue (SRQ) srq.  It stops processing
       WRs from this list at the first failure (that can be  detected  immedi-
       ately  while  requests  are  being posted), and returns this failing WR
       through bad_wr.

       The argument wr is  an  ibv_recv_wr  struct,  as  defined  in  <infini-
       band/verbs.h>.

       struct ibv_recv_wr {
               uint64_t                wr_id;     /* User defined WR ID */
               struct ibv_recv_wr     *next;      /* Pointer to next WR in list, NULL if last WR */
               struct ibv_sge         *sg_list;   /* Pointer to the s/g array */
               int                     num_sge;   /* Size of the s/g array */
       };

       struct ibv_sge {
               uint64_t                addr;      /* Start address of the local memory buffer */
               uint32_t                length;    /* Length of the buffer */
               uint32_t                lkey;      /* Key of the local Memory Region */
       };

RETURN VALUE
       ibv_post_srq_recv()  returns  0  on  success,  or the value of errno on
       failure (which indicates the failure reason).


ATTRIBUTES
       See attributes(7) for descriptions of the following attributes:


       +---------------+-----------------------+
       |ATTRIBUTE TYPE |   ATTRIBUTE VALUE     |
       +---------------+-----------------------+
       |Availability   | network/open-fabrics  |
       +---------------+-----------------------+
       |Stability      | Pass-through volatile |
       +---------------+-----------------------+
NOTES
       The buffers used by a WR can only be safely reused after WR the request
       is  fully  executed  and  a work completion has been retrieved from the
       corresponding completion queue (CQ).

       If a WR is being posted to a UD QP, the Global Routing Header (GRH)  of
       the  incoming  message will be placed in the first 40 bytes of the buf-
       fer(s) in the scatter list.  If no GRH is present in the incoming  mes-
       sage,  then  the first bytes will be undefined.  This means that in all
       cases, the actual data of the incoming message will start at an  offset
       of 40 bytes into the buffer(s) in the scatter list.

SEE ALSO
       ibv_create_qp(3), ibv_post_send(3), ibv_post_recv(3), ibv_poll_cq(3)

AUTHORS
       Dotan Barak <dotanba@gmail.com>


              This    software    was   built   from   source   available   at
              https://github.com/oracle/solaris-userland.  The original commu-
              nity   source   was   downloaded   from   ['https://www.openfab-
              rics.org/downloads/ibutils/ibutils-1.5.7-0.2.gbd7e502.tar.gz',
              'https://www.openfabrics.org/downloads/libibverbs/libib-
              verbs-1.1.8.tar.gz',          'https://www.openfabrics.org/down-
              loads/libmlx4/libmlx4-1.0.6.tar.gz',       'https://www.openfab-
              rics.org/downloads/libsdp/libsdp-1.1.108-0.15.gd7fdb72.tar.gz',
              'https://www.openfabrics.org/downloads/management/infiniband-
              diags-1.6.5.tar.gz', 'https://www.openfabrics.org/downloads/man-
              agement/libibmad-1.3.12.tar.gz',           'https://www.openfab-
              rics.org/downloads/management/libibumad-1.3.10.2.tar.gz',
              'https://www.openfabrics.org/downloads/manage-
              ment/opensm-3.3.19.tar.gz',   'https://www.openfabrics.org/down-
              loads/perftest/perftest-1.3.0-0.42.gf350d3d.tar.gz',
              'https://www.openfabrics.org/down-
              loads/qperf/qperf-0.4.9.tar.gz',           'https://www.openfab-
              rics.org/downloads/rdmacm/librdmacm-1.0.21.tar.gz',
              'https://www.openfabrics.org/downloads/rds-tools/rds-
              tools-2.0.4.tar.gz']

              Further information about this software can be found on the open
              source community website at http://www.openfabrics.org/.



libibverbs                        2006-10-31              IBV_POST_SRQ_RECV(3)