From 47af48012e2afaaf56108466fb967009670660bb Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Sat, 14 Jan 2023 00:09:20 +0000 Subject: [netdevice] Separate concept of scope ID from network device name index The network device index currently serves two purposes: acting as a sequential index for network device names ("net0", "net1", etc), and acting as an opaque unique integer identifier used in socket address scope IDs. There is no particular need for these usages to be linked, and it can lead to situations in which devices are named unexpectedly. For example: if a system has two network devices "net0" and "net1", a VLAN is created as "net1-42", and then a USB NIC is connected, then the USB NIC will be named "net3" rather than the expected "net2" since the VLAN device "net1-42" will have consumed an index. Separate the usages: rename the "index" field to "scope_id" (matching its one and only use case), and assign the name without reference to the scope ID by finding the first unused name. For consistency, assign the scope ID by similarly finding the first unused scope ID. Signed-off-by: Michael Brown --- src/include/ipxe/netdevice.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'src/include') diff --git a/src/include/ipxe/netdevice.h b/src/include/ipxe/netdevice.h index 294f7b367..29358dba0 100644 --- a/src/include/ipxe/netdevice.h +++ b/src/include/ipxe/netdevice.h @@ -356,8 +356,8 @@ struct net_device { struct list_head list; /** List of open network devices */ struct list_head open_list; - /** Index of this network device */ - unsigned int index; + /** Scope ID */ + unsigned int scope_id; /** Name of this network device */ char name[NETDEV_NAME_LEN]; /** Underlying hardware device */ @@ -726,7 +726,7 @@ extern void netdev_close ( struct net_device *netdev ); extern void unregister_netdev ( struct net_device *netdev ); extern void netdev_irq ( struct net_device *netdev, int enable ); extern struct net_device * find_netdev ( const char *name ); -extern struct net_device * find_netdev_by_index ( unsigned int index ); +extern struct net_device * find_netdev_by_scope_id ( unsigned int scope_id ); extern struct net_device * find_netdev_by_location ( unsigned int bus_type, unsigned int location ); extern struct net_device * -- cgit v1.2.3-55-g7522