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Fix capabilities handling for iflib drivers

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Various capabilities were not being handled correctly in the
SIOCSIFCAP handler. Specifically:

IFCAP_RXCSUM and IFCAP_RXCSUM_IPV6 could be set even if not supported

It was impossible to disable IFCAP_RXCSUM and/or IFCAP_RXCSUM_IPV6 via
ifconfig since it does ioctl() per command-line flag rather than combine
them into a single call.

IFCAP_VLAN_HWCSUM could not be modified via the ioctl()

Setting any combination of the three IFCAP_WOL flags would set only
IFCAP_WOL_MCAST | IFCAP_WOL_MAGIC. For example, setting only
IFCAP_WOL_UCAST would result in both IFCAP_WOL_MCAST and IFCAP_WOL_MAGIC
being enabled, but IFCAP_WOL_UCAST would not be enabled.

Because if_vlancap() was called before if_togglecapenable(), vlan flags
were sometimes not applied correctly.

Interfaces were being unnecessarily stopped and restarted for WoL

PR:		231151
Submitted by:	Kaho Toshikazu <kaho@elam.kais.kyoto-u.ac.jp>
Reported by:	Shirkdog <mshirk@daemon-security.com>
Reviewed by:	galladin
Approved by:	re (gjb)
Sponsored by:	Limelight Networks
Differential Revision:	https://reviews.freebsd.org/D17158
This commit is contained in:
Stephen Hurd 2018-09-20 19:35:35 +00:00
parent 4bf0035fd1
commit 0c919c2370
1 changed files with 26 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
sys/net/iflib.c
View File

@ -4100,9 +4100,10 @@ iflib_if_qflush(if_t ifp)
}
#define IFCAP_FLAGS (IFCAP_TXCSUM_IPV6 | IFCAP_RXCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \
IFCAP_TSO4 | IFCAP_TSO6 | IFCAP_VLAN_HWTAGGING | IFCAP_HWSTATS | \
IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | IFCAP_VLAN_HWTSO)
#define IFCAP_FLAGS (IFCAP_HWCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \
IFCAP_TSO | IFCAP_VLAN_HWTAGGING | IFCAP_HWSTATS | \
IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | \
IFCAP_VLAN_HWTSO | IFCAP_VLAN_HWCSUM)
static int
iflib_if_ioctl(if_t ifp, u_long command, caddr_t data)
@ -4223,39 +4224,51 @@ iflib_if_ioctl(if_t ifp, u_long command, caddr_t data)
}
case SIOCSIFCAP:
{
int mask, setmask;
int mask, setmask, oldmask;
mask = ifr->ifr_reqcap ^ if_getcapenable(ifp);
oldmask = if_getcapenable(ifp);
mask = ifr->ifr_reqcap ^ oldmask;
mask &= ctx->ifc_softc_ctx.isc_capabilities;
setmask = 0;
#ifdef TCP_OFFLOAD
setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6);
#endif
setmask |= (mask & IFCAP_FLAGS);
setmask |= (mask & IFCAP_WOL);
/*
* If we're disabling any RX csum, disable all the ones
* the driver supports. This assumes all supported are
* enabled.
*
* Otherwise, if they've changed, enable all of them.
*/
if ((setmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) <
(oldmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)))
setmask &= ~(IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
else if ((setmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) !=
(oldmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)))
setmask |= (mask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6));
if (setmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6))
setmask |= (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
if ((mask & IFCAP_WOL) &&
(if_getcapabilities(ifp) & IFCAP_WOL) != 0)
setmask |= (mask & (IFCAP_WOL_MCAST|IFCAP_WOL_MAGIC));
if_vlancap(ifp);
/*
* want to ensure that traffic has stopped before we change any of the flags
*/
if (setmask) {
CTX_LOCK(ctx);
bits = if_getdrvflags(ifp);
if (bits & IFF_DRV_RUNNING)
if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL)
iflib_stop(ctx);
STATE_LOCK(ctx);
if_togglecapenable(ifp, setmask);
STATE_UNLOCK(ctx);
if (bits & IFF_DRV_RUNNING)
if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL)
iflib_init_locked(ctx);
STATE_LOCK(ctx);
if_setdrvflags(ifp, bits);
STATE_UNLOCK(ctx);
CTX_UNLOCK(ctx);
}
if_vlancap(ifp);
break;
}
case SIOCGPRIVATE_0: