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NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | COLOPHON |
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RDMA_POST_READ(3) Librdmacm Programmer's Manual RDMA_POST_READ(3)
rdma_post_read - post an RDMA read work request.
#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);
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.
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.
Returns 0 on success, or -1 on error. If an error occurs, errno
will be set to indicate the failure reason.
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.
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)
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 2024-06-14. (At
that time, the date of the most recent commit that was found in
the repository was 2024-06-10.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
librdmacm 2010-07-19 RDMA_POST_READ(3)
Pages that refer to this page: rdma_get_recv_comp(3), rdma_get_send_comp(3), rdma_post_readv(3), rdma_reg_msgs(3), rdma_reg_read(3), rdma_cm(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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