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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | AUTHORS | COLOPHON |
IBV_POST_SRQ_RECV(3) Libibverbs Programmer's Manual IBV_POST_SRQ_RECV(3)
ibv_post_srq_recv - post a list of work requests (WRs) to a shared
receive queue (SRQ)
#include <infiniband/verbs.h>
int ibv_post_srq_recv(struct ibv_srq *srq, struct ibv_recv_wr *wr,
struct ibv_recv_wr **bad_wr);
ibv_post_srq_recv() posts the linked list of work requests (WRs)
starting with wr to the shared receive queue (SRQ) srq. It stops
processing WRs from this list at the first failure (that can be
detected immediately 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
<infiniband/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 */
};
ibv_post_srq_recv() returns 0 on success, or the value of errno on
failure (which indicates the failure reason).
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
buffer(s) in the scatter list. If no GRH is present in the incoming
message, 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.
ibv_create_qp(3), ibv_post_send(3), ibv_post_recv(3), ibv_poll_cq(3)
Dotan Barak <dotanba@gmail.com>
This page is part of the rdma-core (RDMA Core Userspace Libraries and
Daemons) project. Information about the project can be found at
⟨https://github.com/linux-rdma/rdma-core⟩. If you have a bug report
for this manual page, send it to linux-rdma@vger.kernel.org. This
page was obtained from the project's upstream Git repository
⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2020-08-13. (At
that time, the date of the most recent commit that was found in the
repository was 2020-08-05.) If you discover any rendering problems
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of the original manual page), send a mail to man-pages@man7.org
libibverbs 2006-10-31 IBV_POST_SRQ_RECV(3)
Pages that refer to this page: ibv_dereg_mr(3) , ibv_post_recv(3) , ibv_post_send(3) , ibv_reg_mr(3) , ibv_reg_mr_iova(3)