Date substring from a string Post: 302933420

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rdma_post_read

RDMA_POST_READ(3)					   Librdmacm Programmer's Manual					 RDMA_POST_READ(3)

NAME

       rdma_post_read - post an RDMA read work request.

SYNOPSIS

       #include <rdma/rdma_verbs.h>

       int  rdma_post_read  (struct  rdma_cm_id *id, void *context, void *addr, size_t length, struct ibv_mr *mr, int flags, uint64_t remote_addr,
       uint32_t rkey);

ARGUMENTS

       id	   A reference to a communication identifier where the request will be posted.

       context	   User-defined context associated with the request.

       addr	   The address of the local destination of the read request.

       length	   The length of the read operation.

       mr	   Registered memory region associated with the local buffer.

       flags	   Optional flags used to control the read operation.

       remote_addr The address of the remote registered memory to read from.

       rkey	   The registered memory key associated with the remote address.

DESCRIPTION

       Posts a work request to the send queue of the queue pair associated with the rdma_cm_id.  The contents of the remote memory region will	be
       read into the local data buffer.

RETURN VALUE

       Returns 0 on success, or -1 on error.  If an error occurs, errno will be set to indicate the failure reason.

NOTES

       For  a  list  of  supported  flags, see ibv_post_send.  Both the remote and local data buffers must have been registered before the read is
       issued, and the buffers must remain registered until the read completes.

       Read operations may not be posted to an rdma_cm_id or the corresponding queue pair until it has been connected.

       The user-defined context associated with the read request will be returned to the user through the  work  completion  wr_id,  work  request
       identifier, field.

SEE ALSO

       rdma_cm(7), rdma_connect(3), rdma_accept(3), ibv_post_send(3), rdma_post_readv(3), rdma_reg_read(3), rdma_reg_msgs(3)

librdmacm							    2010-07-19							 RDMA_POST_READ(3)

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