---
name: "mlx5dv_get_data_direct_sysfs_path"
section: "3"
platform: "linux"
package: "rdma-core"
version: "65.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/mlx5dv_get_data_direct_sysfs_path"
---

# mlx5dv\_get\_data\_direct\_sysfs\_path(3)

Get the sysfs path of a data direct device

## NAME

mlx5dv\_get\_data\_direct\_sysfs\_path - Get the sysfs path of a data direct device

## SYNOPSIS

-

  ```
  #include <infiniband/mlx5dv.h>
  int mlx5dv_get_data_direct_sysfs_path(struct ibv_context *context, char *buf,
                                        size_t buf_len)
  ```

## DESCRIPTION

Get the sysfs path of the data direct device that is associated with the given *context*.

This lets an application to discover whether/which data direct device is associated with the given *context*.

## ARGUMENTS

- *context*

  RDMA device context to work on.

- *buf*

  The buffer where to place the sysfs path of the associated data direct device.

- *buf\_len*

  -

  ```
    The length of the buffer.
  ```

## RETURN VALUE

Upon success 0 is returned or the value of errno on a failure.

## ERRORS

The below specific error values should be considered.

- ENODEV

  -

  ```
    There is no associated data direct device for the given *context*.
  ```

- ENOSPC

  -

  ```
    The input buffer size is too small to hold the full sysfs path.
  ```

## NOTES

Upon succees, the caller should add the /sys/ prefix to get the full sysfs path.

## SEE ALSO

*[mlx5dv\_reg\_dmabuf\_mr(3)](/mlx5dv_reg_dmabuf_mr/3.md)*

## AUTHOR

Yishai Hadas ⟨yishaih@nvidia.com⟩\\c