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ss: add support for xdp statistics

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The patch exposes statistics for XDP sockets which can be useful for
debugging purposes.

The stats exposed are:
    rx dropped
    rx invalid
    rx queue full
    rx fill ring empty
    tx invalid
    tx ring empty

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Signed-off-by: David Ahern <dsahern@gmail.com>
This commit is contained in:
Ciara Loftus 2020-09-24 07:03:27 +00:00 committed by David Ahern
parent f481515c89
commit d2be31d9b6
1 changed files with 21 additions and 1 deletions
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22
misc/ss.c
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@ -4536,6 +4536,21 @@ static void xdp_show_umem(struct xdp_diag_umem *umem, struct xdp_diag_ring *fr,
xdp_show_ring("cr", cr);
}
static void xdp_show_stats(struct xdp_diag_stats *stats)
{
if (oneline)
out(" stats(");
else
out("\n\tstats(");
out("rx dropped:%llu", stats->n_rx_dropped);
out(",rx invalid:%llu", stats->n_rx_invalid);
out(",rx queue full:%llu", stats->n_rx_full);
out(",rx fill ring empty:%llu", stats->n_fill_ring_empty);
out(",tx invalid:%llu", stats->n_tx_invalid);
out(",tx ring empty:%llu", stats->n_tx_ring_empty);
out(")");
}
static int xdp_show_sock(struct nlmsghdr *nlh, void *arg)
{
struct xdp_diag_ring *rx = NULL, *tx = NULL, *fr = NULL, *cr = NULL;
@ -4543,6 +4558,7 @@ static int xdp_show_sock(struct nlmsghdr *nlh, void *arg)
struct rtattr *tb[XDP_DIAG_MAX + 1];
struct xdp_diag_info *info = NULL;
struct xdp_diag_umem *umem = NULL;
struct xdp_diag_stats *stats = NULL;
const struct filter *f = arg;
struct sockstat stat = {};
@ -4577,6 +4593,8 @@ static int xdp_show_sock(struct nlmsghdr *nlh, void *arg)
stat.rq = skmeminfo[SK_MEMINFO_RMEM_ALLOC];
}
if (tb[XDP_DIAG_STATS])
stats = RTA_DATA(tb[XDP_DIAG_STATS]);
if (xdp_stats_print(&stat, f))
return 0;
@ -4588,6 +4606,8 @@ static int xdp_show_sock(struct nlmsghdr *nlh, void *arg)
xdp_show_ring("tx", tx);
if (umem)
xdp_show_umem(umem, fr, cr);
if (stats)
xdp_show_stats(stats);
}
if (show_mem)
@ -4606,7 +4626,7 @@ static int xdp_show(struct filter *f)
req.r.sdiag_family = AF_XDP;
req.r.xdiag_show = XDP_SHOW_INFO | XDP_SHOW_RING_CFG | XDP_SHOW_UMEM |
XDP_SHOW_MEMINFO;
XDP_SHOW_MEMINFO | XDP_SHOW_STATS;
return handle_netlink_request(f, &req.nlh, sizeof(req), xdp_show_sock);
}