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Verify interface up status using its link state only

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if the interface has such capability. The interface
capability flag indicates whether such capability
exists. This approach is much more backward compatible.
Physical device driver changes will be part of another
commit.

Also updated the ifconfig utility to show the LINKSTATE
capability if present.

Reviewed by:	rwatson, imp, juli
MFC after:	3 days
This commit is contained in:
Qing Li 2010-03-16 17:59:12 +00:00
parent f584dfd113
commit 6b533b5ddb
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=205222
5 changed files with 7 additions and 3 deletions
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2
sbin/ifconfig/ifconfig.c
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@ -881,7 +881,7 @@ unsetifdescr(const char *val, int value, int s, const struct afswtch *afp)
#define IFCAPBITS \
"\020\1RXCSUM\2TXCSUM\3NETCONS\4VLAN_MTU\5VLAN_HWTAGGING\6JUMBO_MTU\7POLLING" \
"\10VLAN_HWCSUM\11TSO4\12TSO6\13LRO\14WOL_UCAST\15WOL_MCAST\16WOL_MAGIC" \
"\21VLAN_HWFILTER\23VLAN_HWTSO"
"\21VLAN_HWFILTER\23VLAN_HWTSO\24LINKSTATE"
/*
* Print the status of the interface. If an address family was

1
sys/net/if.h
View File

@ -219,6 +219,7 @@ struct if_data {
#define IFCAP_VLAN_HWFILTER 0x10000 /* interface hw can filter vlan tag */
#define IFCAP_POLLING_NOCOUNT 0x20000 /* polling ticks cannot be fragmented */
#define IFCAP_VLAN_HWTSO 0x40000 /* can do IFCAP_TSO on VLANs */
#define IFCAP_LINKSTATE 0x80000 /* the runtime link state is dynamic */
#define IFCAP_HWCSUM (IFCAP_RXCSUM | IFCAP_TXCSUM)
#define IFCAP_TSO (IFCAP_TSO4 | IFCAP_TSO6)

2
sys/net/if_tap.c
View File

@ -443,6 +443,8 @@ tapcreate(struct cdev *dev)
ifp->if_mtu = ETHERMTU;
ifp->if_flags = (IFF_BROADCAST|IFF_SIMPLEX|IFF_MULTICAST);
ifp->if_snd.ifq_maxlen = ifqmaxlen;
ifp->if_capabilities |= IFCAP_LINKSTATE;
ifp->if_capenable |= IFCAP_LINKSTATE;
dev->si_drv1 = tp;
tp->tap_dev = dev;

2
sys/net/if_tun.c
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@ -386,6 +386,8 @@ tuncreate(const char *name, struct cdev *dev)
ifp->if_snd.ifq_drv_maxlen = 0;
IFQ_SET_READY(&ifp->if_snd);
knlist_init_mtx(&sc->tun_rsel.si_note, NULL);
ifp->if_capabilities |= IFCAP_LINKSTATE;
ifp->if_capenable |= IFCAP_LINKSTATE;
if_attach(ifp);
bpfattach(ifp, DLT_NULL, sizeof(u_int32_t));

3
sys/net/route.h
View File

@ -319,8 +319,7 @@ struct rt_addrinfo {
#ifdef _KERNEL
#define RT_LINK_IS_UP(ifp) (((ifp)->if_flags & \
(IFF_LOOPBACK | IFF_POINTOPOINT)) \
#define RT_LINK_IS_UP(ifp) (!((ifp)->if_capabilities & IFCAP_LINKSTATE) \
|| (ifp)->if_link_state == LINK_STATE_UP)
#define RT_LOCK_INIT(_rt) \