__dev_get_by_name(9) [centos man page]

__DEV_GET_BY_NAME(9)					      Network device support					      __DEV_GET_BY_NAME(9)

NAME

       __dev_get_by_name - find a device by its name

SYNOPSIS

       struct net_device * __dev_get_by_name(struct net * net, const char * name);

ARGUMENTS

       net
	   the applicable net namespace

       name
	   name to find

DESCRIPTION

       Find an interface by name. Must be called under RTNL semaphore or dev_base_lock. If the name is found a pointer to the device is returned.
       If the name is not found then NULL is returned. The reference counters are not incremented so the caller must be careful with locks.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						      __DEV_GET_BY_NAME(9)

STRUCT 
WIRELESS_DEV(9)						Device registration					    STRUCT WIRELESS_DEV(9)

NAME

       struct_wireless_dev - wireless device state

SYNOPSIS

       struct wireless_dev {
	 struct wiphy * wiphy;
	 enum nl80211_iftype iftype;
	 struct list_head list;
	 struct net_device * netdev;
	 u32 identifier;
	 struct list_head mgmt_registrations;
	 spinlock_t mgmt_registrations_lock;
	 struct mutex mtx;
	 struct work_struct cleanup_work;
	 bool use_4addr;
	 bool p2p_started;
	 u8 address[ETH_ALEN];
	 u8 ssid[IEEE80211_MAX_SSID_LEN];
	 u8 ssid_len;
	 u8 mesh_id_len;
	 u8 mesh_id_up_len;
	 enum wext;
       #endif
       };

MEMBERS

       wiphy
	   pointer to hardware description

       iftype
	   interface type

       list
	   (private) Used to collect the interfaces

       netdev
	   (private) Used to reference back to the netdev, may be NULL

       identifier
	   (private) Identifier used in nl80211 to identify this wireless device if it has no netdev

       mgmt_registrations
	   list of registrations for management frames

       mgmt_registrations_lock
	   lock for the list

       mtx
	   mutex used to lock data in this struct

       cleanup_work
	   work struct used for cleanup that can't be done directly

       use_4addr
	   indicates 4addr mode is used on this interface, must be set by driver (if supported) on add_interface BEFORE registering the netdev and
	   may otherwise be used by driver read-only, will be update by cfg80211 on change_interface

       p2p_started
	   true if this is a P2P Device that has been started

       address[ETH_ALEN]
	   The address for this device, valid only if netdev is NULL

       ssid[IEEE80211_MAX_SSID_LEN]
	   (private) Used by the internal configuration code

       ssid_len
	   (private) Used by the internal configuration code

       mesh_id_len
	   (private) Used by the internal configuration code

       mesh_id_up_len
	   (private) Used by the internal configuration code

       wext
	   (private) Used by the internal wireless extensions compat code

DESCRIPTION

       For netdevs, this structure must be allocated by the driver that uses the ieee80211_ptr field in struct net_device (this is intentional so
       it can be allocated along with the netdev.) It need not be registered then as netdev registration will be intercepted by cfg80211 to see
       the new wireless device.

       For non-netdev uses, it must also be allocated by the driver in response to the cfg80211 callbacks that require it, as there's no netdev
       registration in that case it may not be allocated outside of callback operations that return it.

AUTHOR

       Johannes Berg <johannes@sipsolutions.net>
	   Author.

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014						    STRUCT WIRELESS_DEV(9)