IBV_OPEN_DEVICE - Online Linux Manual PageSection : 3
Updated : 2006-10-31
Source : libibverbs
Note : Libibverbs Programmer's Manual

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NAMEibv_open_device, ibv_close_device − open and close an RDMA device context

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SYNOPSIS#include <infiniband/verbs.h> struct ibv_context *ibv_open_device(struct ibv_device *device"); int ibv_close_device(struct ibv_context *context");

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

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RETURN VALUEibv_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.

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NOTESibv_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.

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SEE ALSOibv_get_device_list(3), ibv_query_device(3), ibv_query_port(3), ibv_query_gid(3), ibv_query_pkey(3)

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AUTHORSDotan Barak <dotanba@gmail.com> 0

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Johanes Gumabo

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