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net: iflib: sync isc_capenable to if_capenable

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On SIOCSIFCAP, some bits in ifp->if_capenable may be toggled.
When this happens, apply the same change to isc_capenable, which
is the iflib private copy of if_capenable (for a subset of the
IFCAP_* bits). In this way the iflib drivers can check the bits
using isc_capenable rather than if_capenable. This is convenient
because the latter access requires an additional indirection
through the ifp, and it is also less likely to be in cache.

PR:		260068
Reviewed by:	kbowling, gallatin
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D33156
This commit is contained in:
Vincenzo Maffione 2021-12-28 10:47:13 +00:00
parent a7ba00a438
commit 4561c4f0ca
1 changed files with 1 additions and 0 deletions
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1
sys/net/iflib.c
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@ -4449,6 +4449,7 @@ iflib_if_ioctl(if_t ifp, u_long command, caddr_t data)
iflib_stop(ctx);
STATE_LOCK(ctx);
if_togglecapenable(ifp, setmask);
ctx->ifc_softc_ctx.isc_capenable ^= setmask;
STATE_UNLOCK(ctx);
if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL)
iflib_init_locked(ctx);