2009/11/17 Pyun YongHyeon <pyu...@gmail.com>:
> On Mon, Nov 16, 2009 at 11:04:20PM +0100, Attilio Rao wrote:
>> 2009/11/16 Pyun YongHyeon <pyu...@gmail.com>:
>> > On Mon, Nov 16, 2009 at 04:15:09PM +0100, Attilio Rao wrote:
>> >> [Please CC me as I'm not subscribed to -...@]
>> >>
>> >> This patch allows to show the informations about packets droped on
>> >> input for interfaces on netstat:
>> >> http://www.freebsd.org/~attilio/Sandvine/STABLE_8/idrops/idrops.diff
>> >>
>> >> This patch as been contributed back from Sandvine Incorporated.
>> >> Comments, reviews and testing are welcome.
>> >>
>> >
>> > Doesn't -d of netstat(1) show the same information?
>>
>> Am I wrong or "-d" prints the drops on the output path?
>> The patch provides information on the input drops.
>>
>
> struct if_data {
> /* generic interface information */
> u_char ifi_type; /* ethernet, tokenring, etc */
> u_char ifi_physical; /* e.g., AUI, Thinnet, 10base-T, etc */
> [...]
> u_long ifi_iqdrops; /* dropped on input, this interface */
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> u_long ifi_noproto; /* destined for unsupported protocol */
> u_long ifi_hwassist; /* HW offload capabilities, see IFCAP
> */
> time_t ifi_epoch; /* uptime at attach or stat reset */
> struct timeval ifi_lastchange; /* time of last administrative change
> */
> };
Err, but dflag does print out if_snd.ifq_drops. Infact:
@if.c:sidewaysintpr()
[...]
if (!first) {
show_stat("lu", 10, ifnet.if_ipackets - ip->ift_ip, 1);
show_stat("lu", 5, ifnet.if_ierrors - ip->ift_ie, 1);
show_stat("lu", 10, ifnet.if_ibytes - ip->ift_ib, 1);
show_stat("lu", 10, ifnet.if_opackets - ip->ift_op, 1);
show_stat("lu", 5, ifnet.if_oerrors - ip->ift_oe, 1);
show_stat("lu", 10, ifnet.if_obytes - ip->ift_ob, 1);
show_stat("NRSlu", 5,
ifnet.if_collisions - ip->ift_co, 1);
if (dflag)
show_stat("LSu", 5,
ifnet.if_snd.ifq_drops - ip->ift_dr, 1);
}
[...]
if (!first) {
show_stat("lu", 10, sum->ift_ip - total->ift_ip, 1);
show_stat("lu", 5, sum->ift_ie - total->ift_ie, 1);
show_stat("lu", 10, sum->ift_ib - total->ift_ib, 1);
show_stat("lu", 10, sum->ift_op - total->ift_op, 1);
show_stat("lu", 5, sum->ift_oe - total->ift_oe, 1);
show_stat("lu", 10, sum->ift_ob - total->ift_ob, 1);
show_stat("NRSlu", 5, sum->ift_co - total->ift_co, 1);
if (dflag)
show_stat("LSu", 5,
sum->ift_dr - total->ift_dr, 1);
}
Which is defined in sys/net/if_var.h as:
struct ifnet {
void *if_softc; /* pointer to driver state */
void *if_l2com; /* pointer to protocol bits */
struct vnet *if_vnet; /* pointer to network stack instance */
[...]
int if_drv_flags; /* driver-managed status flags */
struct ifaltq if_snd; /* output queue (includes altq) */
const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
[...]
};
Thanks,
Attilio
--
Peace can only be achieved by understanding - A. Einstein
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