diff options
| author | Conrad Meyer <cem@FreeBSD.org> | 2015-11-19 19:53:19 +0000 |
|---|---|---|
| committer | Conrad Meyer <cem@FreeBSD.org> | 2015-11-19 19:53:19 +0000 |
| commit | 70bca634d018c4ce3929d88e57f63c40641b2c07 (patch) | |
| tree | 6ddd2c6d1330361faed74dfda7a41a422d17ee0e /sys/dev/ntb/if_ntb | |
| parent | f51a1fe048a60cb08616d88af3dcc11588ec8010 (diff) | |
| download | src-70bca634d018c4ce3929d88e57f63c40641b2c07.tar.gz src-70bca634d018c4ce3929d88e57f63c40641b2c07.zip | |
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
Notes
Notes:
svn path=/head/; revision=291085
Diffstat (limited to 'sys/dev/ntb/if_ntb')
| -rw-r--r-- | sys/dev/ntb/if_ntb/if_ntb.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sys/dev/ntb/if_ntb/if_ntb.c b/sys/dev/ntb/if_ntb/if_ntb.c index 1459126ee048..a532d2b2a40d 100644 --- a/sys/dev/ntb/if_ntb/if_ntb.c +++ b/sys/dev/ntb/if_ntb/if_ntb.c @@ -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_level, CTLFLAG_RWTUN, } \ } 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) + |