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ibv_open_device(3)

libibverbs
2006-10-31
Aliases: ibv_close_device(3), ibv_close_device(3), ibv_close_device(3)

libibverbs-dev

Development files for the libibverbs library

rdma-core-devel

RDMA core development libraries and headers

libibverbs-devel

Development files for the libibverbs library

NAME

ibv_open_device, ibv_close_device - open and close an RDMA device context

SYNOPSIS

#include <infiniband/verbs.h>

struct ibv_context *ibv_open_device(struct ibv_device *device);
int ibv_close_device(struct ibv_context *context);

DESCRIPTION

ibv_open_device() opens the device device and creates a context for further use.
ibv_close_device() closes the device context context.

RETURN VALUE

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.

NOTES

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.

AUTHORS

Dotan Barak <>
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