RDMA_POST_WRITEV(3) Librdmacm Programmer's Manual RDMA_POST_WRITEV(3)
rdma_post_writev - post an RDMA write work request.
#include <rdma/rdma_verbs.h> int rdma_post_writev (struct rdma_cm_id *id, void *context, struct ibv_sge *sgl, int nsge, 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. sgl A scatter-gather list of the source buffers of the write. nsge The number of scatter-gather array entries. flags Optional flags used to control the write operation. remote_addr The address of the remote registered memory to write into. 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 local data buffers will be written into the remote memory region.
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. Unless inline data is specified, the local data buffers must have been registered before the write is issued, and the buffers must remain registered until the write completes. The remote buffers must always be registered. Write 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 write 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_write(3), rdma_reg_write(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 firstname.lastname@example.org. This page was obtained from the project's upstream Git repository ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2020-06-09. (At that time, the date of the most recent commit that was found in the repository was 2020-06-05.) 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 email@example.com librdmacm 2010-07-19 RDMA_POST_WRITEV(3)
Pages that refer to this page: rdma_post_write(3), rdma_reg_msgs(3), rdma_cm(7)