Date: Thu, 19 Nov 2015 19:53:19 +0000 (UTC) From: "Conrad E. Meyer" <cem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r291085 - head/sys/dev/ntb/if_ntb Message-ID: <201511191953.tAJJrJRc066915@repo.freebsd.org>
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Author: cem Date: Thu Nov 19 19:53:19 2015 New Revision: 291085 URL: https://svnweb.freebsd.org/changeset/base/291085 Log: if_ntb: Initialize if_mtu to the correct MTU Lower the payload data (IP) portion of the MTU from 0x10000 to IP_MAXPACKET (0xFFFF) to avoid panicing the IP stack. Sponsored by: EMC / Isilon Storage Division Modified: head/sys/dev/ntb/if_ntb/if_ntb.c Modified: head/sys/dev/ntb/if_ntb/if_ntb.c ============================================================================== --- head/sys/dev/ntb/if_ntb/if_ntb.c Thu Nov 19 19:53:09 2015 (r291084) +++ head/sys/dev/ntb/if_ntb/if_ntb.c Thu Nov 19 19:53:19 2015 (r291085) @@ -59,6 +59,9 @@ __FBSDID("$FreeBSD$"); #include <machine/cpufunc.h> #include <machine/pmap.h> +#include <netinet/in.h> +#include <netinet/ip.h> + #include "../ntb_hw/ntb_hw.h" /* @@ -101,7 +104,7 @@ SYSCTL_UINT(_hw_if_ntb, OID_AUTO, debug_ } \ } while (0) -static unsigned transport_mtu = 0x10000 + ETHER_HDR_LEN + ETHER_CRC_LEN; +static unsigned transport_mtu = IP_MAXPACKET + ETHER_HDR_LEN + ETHER_CRC_LEN; static uint64_t max_mw_size; SYSCTL_UQUAD(_hw_if_ntb, OID_AUTO, max_mw_size, CTLFLAG_RDTUN, &max_mw_size, 0, @@ -435,6 +438,8 @@ ntb_setup_interface(void) ether_ifattach(ifp, net_softc.eaddr); ifp->if_capabilities = IFCAP_HWCSUM | IFCAP_JUMBO_MTU; ifp->if_capenable = ifp->if_capabilities; + ifp->if_mtu = ntb_transport_max_size(net_softc.qp) - ETHER_HDR_LEN - + ETHER_CRC_LEN; ntb_transport_link_up(net_softc.qp); net_softc.bufsize = ntb_transport_max_size(net_softc.qp) +
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