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RDMA_REG_WRITE(3) - Linux man page online | Library functions

Register data buffer(s) for remote RDMA write access.

Chapter
2010-07-19
RDMA_REG_WRITE(3) Librdmacm Programmer's Manual RDMA_REG_WRITE(3)

NAME

rdma_reg_write - register data buffer(s) for remote RDMA write access.

SYNOPSIS

#include <rdma/rdma_verbs.h> struct ibv_mr * rdma_reg_write (struct rdma_cm_id *id, void *addr, size_t length);

ARGUMENTS

id A reference to a communication identifier where the message buffer(s) will be used. addr The address of the memory buffer(s) to register. length The total length of the memory to register.

DESCRIPTION

Registers a memory buffer that will be accessed by a remote RDMA write operation. Memory buffers registered using rdma_reg_write may be targeted in an RDMA write request, allowing the buffer to be specified on the remote side of an RDMA connection as the remote_addr of rdma_post_write, or similar call.

RETURN VALUE

Returns a reference to the registered memory region on success, or NULL on error. If an error occurs, errno will be set to indicate the failure reason.

NOTES

rdma_reg_write is used to register a data buffer that will be the target of an RDMA write operation on a queue pair associated with an rdma_cm_id. The memory buffer is registered with the proteection domain associated with the idenfier. The start of the data buffer is specified through the addr parameter, and the total size of the buffer is given by length. All data buffers should be registered before being posted as a work request. Users must deregister all registered memory by calling rdma_dereg_mr.

SEE ALSO

rdma_cm(7), rdma_create_id(3), rdma_create_ep(3), rdma_reg_msgs(3), rdma_reg_read(3), ibv_reg_mr(3), ibv_dereg_mr(3), rdma_post_write(3)
librdmacm 2010-07-19 RDMA_REG_WRITE(3)
This manual Reference Other manuals
rdma_reg_write(3) referred by rdma_cm(7) | rdma_dereg_mr(3) | rdma_post_write(3) | rdma_post_writev(3) | rdma_reg_msgs(3) | rdma_reg_read(3)
refer to ibv_reg_mr(3) | rdma_cm(7) | rdma_create_ep(3) | rdma_create_id(3) | rdma_post_write(3) | rdma_reg_msgs(3) | rdma_reg_read(3)
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