From: Luciano Coelho <luciano.coelho@xxxxxxxxx>
This new command has a complex trace, with a variable number of struct
elements in an array and needs special parsing. Add a parsing
function to handle it.
Signed-off-by: Luciano Coelho <luciano.coelho@xxxxxxxxx>
---
I'm sending this to linux-wireless as an RFC before sending it to
Steven to get some comments and because the new function hasn't yet
gotten to linux-wireless/mainline.
plugin_mac80211.c | 93 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 93 insertions(+)
diff --git a/plugin_mac80211.c b/plugin_mac80211.c
index f35cb80..0b4835e 100644
--- a/plugin_mac80211.c
+++ b/plugin_mac80211.c
@@ -191,12 +191,105 @@ static int drv_config(struct trace_seq *s, struct pevent_record *record,
return 0;
}
+struct trace_vif_entry {
+ int vif_type;
+ bool p2p;
+ char vif_name[8];
+} __attribute__((packed));
+
+struct trace_chandef_entry {
+ unsigned int control_freq;
+ unsigned int chan_width;
+ unsigned int center_freq1;
+ unsigned int center_freq2;
+} __attribute__((packed));
+
+struct trace_switch_entry {
+ struct trace_vif_entry vif;
+ struct trace_chandef_entry old_chandef;
+ struct trace_chandef_entry new_chandef;
+} __attribute__((packed));
+
+static int drv_switch_vif_chanctx(struct trace_seq *s,
+ struct pevent_record *record,
+ struct event_format *event, void *context)
+{
+ struct format_field *f = pevent_find_field(event, "n_vifs");
+ unsigned int i, offset, len;
+ long long unsigned int n_vifs;
+ void *data = record->data;
+ struct trace_switch_entry *vifs;
+
+ if (!f) {
+ trace_seq_printf(s, "NOTFOUND: n_vifs");
+ return 0;
+ }
+
+ if (pevent_read_number_field(f, data, &n_vifs)) {
+ trace_seq_puts(s, "field-invalid: n_vifs");
+ return 0;
+ }
+
+ f = pevent_find_field(event, "vifs");
+
+ if (!f) {
+ trace_seq_printf(s, "NOTFOUND: vifs");
+ return 0;
+ }
+
+ offset = f->offset;
+ len = f->size;
+ if (f->flags & FIELD_IS_DYNAMIC) {
+ long long unsigned int val;
+
+ val = pevent_read_number(event->pevent, data + offset, len);
+ offset = val;
+ len = offset >> 16;
+ offset &= 0xffff;
+ }
+
+ if (len != sizeof(*vifs) * n_vifs) {
+ trace_seq_printf(s, "field-invalid: vifs");
+ return 0;
+ }
+
+ print_string(s, event, "wiphy_name", data);
+ pevent_print_num_field(s, " n_vifs:%d ", event, "n_vifs", record, 1);
+ print_enum(s, event, "mode", data,
+ { 0, "REASSIGN_VIF" },
+ { 1, "SWAP_CONTEXTS"} );
+
+ vifs = (void *) (char *) data + offset;
+
+ for (i = 0; i < n_vifs; i++) {
+ trace_seq_printf(s, "\n%*s\t", INDENT, "");
+ trace_seq_printf(s, "vif %d:\tname: %s type: %d p2p: %d",
+ i, vifs[i].vif.vif_name, vifs[i].vif.vif_type,
+ vifs[i].vif.p2p);
+ trace_seq_printf(s, "\n%*s\t\t", INDENT, "");
+ trace_seq_printf(s, "old_ctx: control_freq: %d chan_width: %d center_freq1: %d center_freq2: %d",
+ vifs[i].old_chandef.control_freq,
+ vifs[i].old_chandef.chan_width,
+ vifs[i].old_chandef.center_freq1,
+ vifs[i].old_chandef.center_freq2);
+ trace_seq_printf(s, "\n%*s\t\t", INDENT, "");
+ trace_seq_printf(s, "new_ctx: control_freq: %d chan_width: %d center_freq1: %d center_freq2: %d",
+ vifs[i].new_chandef.control_freq,
+ vifs[i].new_chandef.chan_width,
+ vifs[i].new_chandef.center_freq1,
+ vifs[i].new_chandef.center_freq2);
+ }
+
+ return 0;
+}
int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
{
pevent_register_event_handler(pevent, -1, "mac80211", "drv_bss_info_changed",
drv_bss_info_changed, NULL);
pevent_register_event_handler(pevent, -1, "mac80211", "drv_config",
drv_config, NULL);
+ pevent_register_event_handler(pevent, -1, "mac80211", "drv_switch_vif_chanctx",
+ drv_switch_vif_chanctx, NULL);
return 0;
}
--
2.0.0.rc0
--
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