Date: Fri, 20 Oct 2023 10:51:22 GMT From: Doug Rabson <dfr@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: da4b0d6eb06d - main - netfront: fix the support for disabling LRO at boot time Message-ID: <202310201051.39KApMNX019407@gitrepo.freebsd.org>
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The branch main has been updated by dfr: URL: https://cgit.FreeBSD.org/src/commit/?id=da4b0d6eb06d730487d48e15d2d5e10c56266fd9 commit da4b0d6eb06d730487d48e15d2d5e10c56266fd9 Author: Doug Rabson <dfr@FreeBSD.org> AuthorDate: 2023-08-12 13:19:47 +0000 Commit: Doug Rabson <dfr@FreeBSD.org> CommitDate: 2023-10-20 10:50:20 +0000 netfront: fix the support for disabling LRO at boot time The driver has a tunable hw.xn.enable_lro which is intended to control whether LRO is enabled. This is currently non-functional - even if its set to zero, the driver still requests LRO support from the backend. This change fixes the feature so that if enable_lro is set to zero, LRO no longer appears in the interface capabilities and LRO is not requested from the backend. PR: 273046 MFC after: 1 week Reviewed by: royger Differential Revision: https://reviews.freebsd.org/D41439 --- sys/dev/xen/netfront/netfront.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/sys/dev/xen/netfront/netfront.c b/sys/dev/xen/netfront/netfront.c index b4e7722552e6..dafb838cf328 100644 --- a/sys/dev/xen/netfront/netfront.c +++ b/sys/dev/xen/netfront/netfront.c @@ -2272,7 +2272,7 @@ int create_netdev(device_t dev) { struct netfront_info *np; - int err; + int err, cap_enabled; if_t ifp; np = device_get_softc(dev); @@ -2304,7 +2304,11 @@ create_netdev(device_t dev) if_sethwassist(ifp, XN_CSUM_FEATURES); /* Enable all supported features at device creation. */ if_setcapabilities(ifp, IFCAP_HWCSUM|IFCAP_TSO4|IFCAP_LRO); - if_setcapenable(ifp, if_getcapabilities(ifp)); + cap_enabled = if_getcapabilities(ifp); + if (!xn_enable_lro) { + cap_enabled &= ~IFCAP_LRO; + } + if_setcapenable(ifp, cap_enabled); if_sethwtsomax(ifp, 65536 - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); if_sethwtsomaxsegcount(ifp, MAX_TX_REQ_FRAGS);
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