---
name: "dev_get_by_index_rcu"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/dev_get_by_index_rcu"
---

# dev\_get\_by\_index\_rcu(9)

find a device by its ifindex

## NAME

dev\_get\_by\_index\_rcu - find a device by its ifindex

## SYNOPSIS

**struct net\_device \* dev\_get\_by\_index\_rcu(struct net \*** *net***, int** *ifindex***);**

## ARGUMENTS

*net*

the applicable net namespace

*ifindex*

index of device

## DESCRIPTION

Search for an interface by index. Returns **NULL** if the device is not found or a pointer to the device. The device has not had its reference counter increased so the caller must be careful about locking. The caller must hold RCU lock.

## COPYRIGHT