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Message-ID: <20151027131758.GG26876@orbit.nwl.cc>
Date: Tue, 27 Oct 2015 14:17:58 +0100
From: Phil Sutter <phil@....cc>
To: Matthias Tafelmeier <matthias.tafelmeier@....net>
Cc: netdev@...r.kernel.org, hagen@...u.net, shemminger@...l.org,
fw@...len.de, edumazet@...gle.com, daniel@...earbox.net
Subject: Re: [PATCH v7 08/10] ss: symmetrical formatter extension example
On Thu, Sep 10, 2015 at 09:35:06PM +0200, Matthias Tafelmeier wrote:
> This commit shall show shortly where to place changes when one wants to
> extend an ss output formatter with a new handler (format print
> procedure). The extension is done symmetrically. That means, every up to
> now existing formatter is extended with a semantically equivalent
> handler (hr and json formatter).
>
> Signed-off-by: Matthias Tafelmeier <matthias.tafelmeier@....net>
> Suggested-by: Hagen Paul Pfeifer <hagen@...u.net>
> ---
> misc/ss_hr_fmt.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++--
> misc/ss_json_fmt.c | 69 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
> misc/ss_out_fmt.c | 10 ++++++++
> misc/ss_out_fmt.h | 10 ++++++++
> 4 files changed, 150 insertions(+), 4 deletions(-)
>
> diff --git a/misc/ss_hr_fmt.c b/misc/ss_hr_fmt.c
> index 4046ebf..a2bef60 100644
> --- a/misc/ss_hr_fmt.c
> +++ b/misc/ss_hr_fmt.c
> @@ -85,8 +85,8 @@ static void tcp_stats_hr_fmt(struct tcpstat *s)
> if (s->rcv_space)
> printf(" rcv_space:%d", s->rcv_space);
>
> - CHECK_FMT_ADAPT(s->rcv_space, s,
> - hr_handler_must_be_adapted_accordingly_when_json_fmt_is_extended);
> + /*hr handler must be adapted accordingly when json fmt is extended*/
> + CHECK_FMT_ADAPT(s->rcv_space, s);
Unrelated change? Patch 02/10 introduces CHECK_FMT_ADAPT macro which
takes just two parameters. Quite confusing, especially since this patch
is meant to be documentation.
> }
>
> static void tcp_timer_hr_fmt(struct tcpstat *s)
> @@ -242,6 +242,66 @@ static void packet_show_ring_hr_fmt(struct packet_diag_ring *ring)
> printf(",features:0x%x", ring->pdr_features);
> }
>
> +static void packet_details_hr_fmt(struct packet_diag_info *pinfo,
> + struct packet_diag_ring *ring_rx,
> + struct packet_diag_ring *ring_tx,
> + uint32_t fanout,
> + bool has_fanout)
> +{
> + if (pinfo) {
> + printf("\n\tver:%d", pinfo->pdi_version);
> + printf(" cpy_thresh:%d", pinfo->pdi_copy_thresh);
> + printf(" flags( ");
> + if (pinfo->pdi_flags & PDI_RUNNING)
> + printf("running");
> + if (pinfo->pdi_flags & PDI_AUXDATA)
> + printf(" auxdata");
> + if (pinfo->pdi_flags & PDI_ORIGDEV)
> + printf(" origdev");
> + if (pinfo->pdi_flags & PDI_VNETHDR)
> + printf(" vnethdr");
> + if (pinfo->pdi_flags & PDI_LOSS)
> + printf(" loss");
> + if (!pinfo->pdi_flags)
> + printf("0");
> + printf(" )");
> + }
> + if (ring_rx) {
> + printf("\n\tring_rx(");
> + packet_show_ring_fmt(ring_rx);
> + printf(")");
> + }
> + if (ring_tx) {
> + printf("\n\tring_tx(");
> + packet_show_ring_fmt(ring_tx);
> + printf(")");
> + }
> + if (has_fanout) {
> + uint16_t type = (fanout >> 16) & 0xffff;
> +
> + printf("\n\tfanout(");
> + printf("id:%d,", fanout & 0xffff);
> + printf("type:");
> +
> + if (type == 0)
> + printf("hash");
> + else if (type == 1)
> + printf("lb");
> + else if (type == 2)
> + printf("cpu");
> + else if (type == 3)
> + printf("roll");
> + else if (type == 4)
> + printf("random");
> + else if (type == 5)
> + printf("qm");
> + else
> + printf("0x%x", type);
> +
> + printf(")");
> + }
> +}
> +
> const struct fmt_op_hub hr_output_op = {
> .tcp_stats_fmt = tcp_stats_hr_fmt,
> .tcp_timer_fmt = tcp_timer_hr_fmt,
> @@ -257,4 +317,5 @@ const struct fmt_op_hub hr_output_op = {
> .opt_fmt = opt_hr_fmt,
> .proc_fmt = proc_hr_fmt,
> .packet_show_ring_fmt = packet_show_ring_hr_fmt,
> + .packet_details_fmt = packet_details_hr_fmt
> };
> diff --git a/misc/ss_json_fmt.c b/misc/ss_json_fmt.c
> index 1dff57a..9b50832 100644
> --- a/misc/ss_json_fmt.c
> +++ b/misc/ss_json_fmt.c
> @@ -166,8 +166,8 @@ static void tcp_stats_json_fmt(struct tcpstat *s)
> /*deal with special case */
> res_json_fmt_branch(s->ss.state == SS_LISTEN, ' ');
>
> - CHECK_FMT_ADAPT(s->rcv_space, s,
> - json_handler_must_be_adapted_accordingly_when_hr_fmt_is_extended);
> + /*json handler must be adapted accordingly when hr fmt is extended*/
> + CHECK_FMT_ADAPT(s->rcv_space, s);
> }
>
> static void tcp_timer_json_fmt(struct tcpstat *s)
> @@ -392,6 +392,70 @@ static void packet_show_ring_json_fmt(struct packet_diag_ring *ring)
> jsonw_hex_field_outp(json_wr, "features_0x", ring->pdr_features);
> }
>
> +static void packet_details_json_fmt(struct packet_diag_info *pinfo,
> + struct packet_diag_ring *ring_rx,
> + struct packet_diag_ring *ring_tx,
> + uint32_t fanout,
> + bool has_fanout)
> +{
> + char tmp_out[16];
> +
> + if (pinfo) {
> + jsonw_int_field(json_wr, "ver", pinfo->pdi_version);
> + jsonw_int_field(json_wr, "cpy_thresh", pinfo->pdi_copy_thresh);
> + if (pinfo->pdi_flags & PDI_RUNNING)
> + sprintf(tmp_out, "running");
> + if (pinfo->pdi_flags & PDI_AUXDATA)
> + sprintf(tmp_out, "_auxdata");
> + if (pinfo->pdi_flags & PDI_ORIGDEV)
> + sprintf(tmp_out, "_origdev");
> + if (pinfo->pdi_flags & PDI_VNETHDR)
> + sprintf(tmp_out, "_vnethdr");
> + if (pinfo->pdi_flags & PDI_LOSS)
> + sprintf(tmp_out, "_loss");
> + if (!pinfo->pdi_flags)
> + sprintf(tmp_out, "0");
> + jsonw_string_field(json_wr, "flags", tmp_out);
> + }
> + if (ring_rx) {
> + jsonw_name(json_wr, "ring_rx");
> + jsonw_start_object(json_wr);
> + packet_show_ring_fmt(ring_rx);
> + jsonw_end_object(json_wr);
> + }
> + if (ring_tx) {
> + jsonw_name(json_wr, "ring_tx");
> + jsonw_start_object(json_wr);
> + packet_show_ring_fmt(ring_tx);
> + jsonw_end_object(json_wr);
> + }
> + if (has_fanout) {
> + uint16_t type = (fanout >> 16) & 0xffff;
> +
> + jsonw_name(json_wr, "fanout");
> + jsonw_start_object(json_wr);
> + jsonw_int_field(json_wr, "id", fanout & 0xffff);
> +
> + if (type == 0)
> + sprintf(tmp_out, "hash");
> + else if (type == 1)
> + sprintf(tmp_out, "lb");
> + else if (type == 2)
> + sprintf(tmp_out, "cpu");
> + else if (type == 3)
> + sprintf(tmp_out, "roll");
> + else if (type == 4)
> + sprintf(tmp_out, "random");
> + else if (type == 5)
> + sprintf(tmp_out, "qm");
> + else
> + sprintf(tmp_out, "0x%x", type);
> +
> + jsonw_string_field(json_wr, "type", tmp_out);
> + jsonw_end_object(json_wr);
> + }
> +}
> +
> const struct fmt_op_hub json_output_op = {
> .tcp_stats_fmt = tcp_stats_json_fmt,
> .tcp_timer_fmt = tcp_timer_json_fmt,
> @@ -407,4 +471,5 @@ const struct fmt_op_hub json_output_op = {
> .opt_fmt = opt_json_fmt,
> .proc_fmt = proc_json_fmt,
> .packet_show_ring_fmt = packet_show_ring_json_fmt,
> + .packet_details_fmt = packet_details_json_fmt
> };
> diff --git a/misc/ss_out_fmt.c b/misc/ss_out_fmt.c
> index 57bc24e..6d92201 100644
> --- a/misc/ss_out_fmt.c
> +++ b/misc/ss_out_fmt.c
> @@ -125,3 +125,13 @@ void packet_show_ring_fmt(struct packet_diag_ring *ring)
> {
> fmt_op_hub[fmt_type]->packet_show_ring_fmt(ring);
> }
> +void packet_details_fmt(struct packet_diag_info *pinfo,
> + struct packet_diag_ring *ring_rx,
> + struct packet_diag_ring *ring_tx,
> + uint32_t fanout,
> + bool has_fanout)
> +{
> + fmt_op_hub[fmt_type]->packet_details_fmt(pinfo,
> + ring_rx, ring_tx, fanout, has_fanout);
> +}
> +
> diff --git a/misc/ss_out_fmt.h b/misc/ss_out_fmt.h
> index 8608cde..bdc786b 100644
> --- a/misc/ss_out_fmt.h
> +++ b/misc/ss_out_fmt.h
> @@ -55,6 +55,11 @@ struct fmt_op_hub {
> void (*opt_fmt)(char *opt);
> void (*proc_fmt)(int serv_width, char *pid_ctx);
> void (*packet_show_ring_fmt)(struct packet_diag_ring *ring);
> + void (*packet_details_fmt)(struct packet_diag_info *pinfo,
> + struct packet_diag_ring *ring_rx,
> + struct packet_diag_ring *ring_tx,
> + uint32_t fanout,
> + bool has_fanout);
> };
>
> void tcp_stats_fmt(struct tcpstat *s);
> @@ -75,6 +80,11 @@ void bpf_filter_fmt(struct sock_filter *f, int num);
> void opt_fmt(char *opt);
> void proc_fmt(int serv_width, char *pid_ctx);
> void packet_show_ring_fmt(struct packet_diag_ring *ring);
> +void packet_details_fmt(struct packet_diag_info *pinfo,
> + struct packet_diag_ring *ring_rx,
> + struct packet_diag_ring *ring_tx,
> + uint32_t fanout,
> + bool has_fanout);
>
> /*unisonly utilized formatting parts*/
> char *sprint_bw(char *buf, double bw);
> --
> 1.9.1
>
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