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Support IFCAP_NOMAP in vlan(4).

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Enable IFCAP_NOMAP for a vlan interface if it is supported by the
underlying trunk device.

Reviewed by:	gallatin, hselasky, rrs
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D20616
This commit is contained in:
John Baldwin 2019-06-29 00:51:38 +00:00
parent 3807631b8e
commit 66d0c056be
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=349532
1 changed files with 10 additions and 0 deletions
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10
sys/net/if_vlan.c
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@ -1731,6 +1731,16 @@ vlan_capabilities(struct ifvlan *ifv)
ena |= (mena & IFCAP_TXRTLMT);
#endif
/*
* If the parent interface supports unmapped mbufs, so does
* the VLAN interface. Note that this should be fine even for
* interfaces that don't support hardware tagging as headers
* are prepended in normal mbufs to unmapped mbufs holding
* payload data.
*/
cap |= (p->if_capabilities & IFCAP_NOMAP);
ena |= (mena & IFCAP_NOMAP);
ifp->if_capabilities = cap;
ifp->if_capenable = ena;
ifp->if_hwassist = hwa;