IBV_OPEN_DEVICE(3) Libibverbs Programmer's Manual IBV_OPEN_DEVICE(3)
ibv_open_device, ibv_close_device - open and close an RDMA device context
#include <infiniband/verbs.h> struct ibv_context *ibv_open_device(struct ibv_device *device); int ibv_close_device(struct ibv_context *context);
ibv_open_device() opens the device device and creates a context for further use. ibv_close_device() closes the device context context.
ibv_open_device() returns a pointer to the allocated device context, or NULL if the request fails. ibv_close_device() returns 0 on success, -1 on failure.
ibv_close_device() does not release all the resources allocated using context context. To avoid resource leaks, the user should release all associated resources before closing a context. Setting the environment variable **RDMAV_ALLOW_DISASSOC_DESTROY** tells the library to relate an EIO from destroy commands as a success as the kernel resources were already released. This comes to prevent memory leakage in the user space area upon device disassociation. Applications using this flag cannot call ibv_get_cq_event or ibv_get_async_event concurrently with any call to an object destruction function.
ibv_get_device_list(3), ibv_query_device(3), ibv_query_port(3), ibv_query_gid(3), ibv_query_pkey(3)
Dotan Barak <email@example.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 firstname.lastname@example.org. This page was obtained from the project's upstream Git repository ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2021-08-27. (At that time, the date of the most recent commit that was found in the repository was 2021-08-18.) 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 libibverbs 2006-10-31 IBV_OPEN_DEVICE(3)
Pages that refer to this page: ibv_create_ah_from_wc(3), ibv_create_comp_channel(3), ibv_get_async_event(3), ibv_query_device(3), ibv_query_device_ex(3), ibv_query_rt_values_ex(3)