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Although most of the NIC drivers are epoch ready, 

due to peer pressure switch over to opt-in instead of opt-out for epoch.

Instead of IFF_NEEDSEPOCH, provide IFF_KNOWSEPOCH. If driver marks
itself with IFF_KNOWSEPOCH, then ether_input() would not enter epoch
when processing its packets.

Now this will create recursive entrance in epoch in >90% network
drivers, but will guarantee safeness of the transition.

Mark several tested drivers as IFF_KNOWSEPOCH.

Reviewed by:		hselasky, jeff, bz, gallatin
Differential Revision:	https://reviews.freebsd.org/D23674
This commit is contained in:
Gleb Smirnoff 2020-02-24 21:07:30 +00:00 committed by Sebastian Huber
parent 0dfcaa0211
commit f3303cf1d5
1 changed files with 2 additions and 2 deletions
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4
newlib/libc/sys/rtems/include/net/if.h
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@ -144,7 +144,7 @@ struct if_data {
#define IFF_DEBUG 0x4 /* (n) turn on debugging */
#define IFF_LOOPBACK 0x8 /* (i) is a loopback net */
#define IFF_POINTOPOINT 0x10 /* (i) is a point-to-point link */
#define IFF_NEEDSEPOCH 0x20 /* (i) calls if_input w/o epoch */
#define IFF_KNOWSEPOCH 0x20 /* (i) calls if_input in net epoch */
#define IFF_DRV_RUNNING 0x40 /* (d) resources allocated */
#define IFF_NOARP 0x80 /* (n) no address resolution protocol */
#define IFF_PROMISC 0x100 /* (n) receive all packets */
@ -178,7 +178,7 @@ struct if_data {
#define IFF_CANTCHANGE \
(IFF_BROADCAST|IFF_POINTOPOINT|IFF_DRV_RUNNING|IFF_DRV_OACTIVE|\
IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC|\
IFF_DYING|IFF_CANTCONFIG)
IFF_DYING|IFF_CANTCONFIG|IFF_KNOWSEPOCH)
/*
* Values for if_link_state.