scftorture: Count single_rpc offline failures in statistics outputgrafted

scf_torture_stats_print() aggregates each invoker thread's counters
into a local scf_statistics structure before printing, but the
n_single_rpc_ofl field is missing from the aggregation loop.  As a
result, the "single_rpc_ofl" value printed in the statistics line is
always zero, even when smp_call_function_single() invocations for the
RPC test have failed due to offline CPUs and been counted by the
invoker threads.

Add the missing accumulation so that the printed value reflects the
actual counts.

Signed-off-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

1 files changed, 381 insertions, 0 deletions

diff --git a/net/ieee802154/header_ops.c b/net/ieee802154/header_ops.c
new file mode 100644
index 000000000..a9f0c8df5
--- /dev/null
+++ b/net/ieee802154/header_ops.c
@@ -0,0 +1,381 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2014 Fraunhofer ITWM
+ *
+ * Written by:
+ * Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
+ */
+
+#include <linux/ieee802154.h>
+
+#include <net/mac802154.h>
+#include <net/ieee802154_netdev.h>
+
+static int
+ieee802154_hdr_push_addr(u8 *buf, const struct ieee802154_addr *addr,
+			 bool omit_pan)
+{
+	int pos = 0;
+
+	if (addr->mode == IEEE802154_ADDR_NONE)
+		return 0;
+
+	if (!omit_pan) {
+		memcpy(buf + pos, &addr->pan_id, 2);
+		pos += 2;
+	}
+
+	switch (addr->mode) {
+	case IEEE802154_ADDR_SHORT:
+		memcpy(buf + pos, &addr->short_addr, 2);
+		pos += 2;
+		break;
+
+	case IEEE802154_ADDR_LONG:
+		memcpy(buf + pos, &addr->extended_addr, IEEE802154_ADDR_LEN);
+		pos += IEEE802154_ADDR_LEN;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return pos;
+}
+
+static int
+ieee802154_hdr_push_sechdr(u8 *buf, const struct ieee802154_sechdr *hdr)
+{
+	int pos = 5;
+
+	memcpy(buf, hdr, 1);
+	memcpy(buf + 1, &hdr->frame_counter, 4);
+
+	switch (hdr->key_id_mode) {
+	case IEEE802154_SCF_KEY_IMPLICIT:
+		return pos;
+
+	case IEEE802154_SCF_KEY_INDEX:
+		break;
+
+	case IEEE802154_SCF_KEY_SHORT_INDEX:
+		memcpy(buf + pos, &hdr->short_src, 4);
+		pos += 4;
+		break;
+
+	case IEEE802154_SCF_KEY_HW_INDEX:
+		memcpy(buf + pos, &hdr->extended_src, IEEE802154_ADDR_LEN);
+		pos += IEEE802154_ADDR_LEN;
+		break;
+	}
+
+	buf[pos++] = hdr->key_id;
+
+	return pos;
+}
+
+int
+ieee802154_hdr_push(struct sk_buff *skb, struct ieee802154_hdr *hdr)
+{
+	u8 buf[IEEE802154_MAX_HEADER_LEN];
+	int pos = 2;
+	int rc;
+	struct ieee802154_hdr_fc *fc = &hdr->fc;
+
+	buf[pos++] = hdr->seq;
+
+	fc->dest_addr_mode = hdr->dest.mode;
+
+	rc = ieee802154_hdr_push_addr(buf + pos, &hdr->dest, false);
+	if (rc < 0)
+		return -EINVAL;
+	pos += rc;
+
+	fc->source_addr_mode = hdr->source.mode;
+
+	if (hdr->source.pan_id == hdr->dest.pan_id &&
+	    hdr->dest.mode != IEEE802154_ADDR_NONE)
+		fc->intra_pan = true;
+
+	rc = ieee802154_hdr_push_addr(buf + pos, &hdr->source, fc->intra_pan);
+	if (rc < 0)
+		return -EINVAL;
+	pos += rc;
+
+	if (fc->security_enabled) {
+		fc->version = 1;
+
+		rc = ieee802154_hdr_push_sechdr(buf + pos, &hdr->sec);
+		if (rc < 0)
+			return -EINVAL;
+
+		pos += rc;
+	}
+
+	memcpy(buf, fc, 2);
+
+	memcpy(skb_push(skb, pos), buf, pos);
+
+	return pos;
+}
+EXPORT_SYMBOL_GPL(ieee802154_hdr_push);
+
+int ieee802154_mac_cmd_push(struct sk_buff *skb, void *f,
+			    const void *pl, unsigned int pl_len)
+{
+	struct ieee802154_mac_cmd_frame *frame = f;
+	struct ieee802154_mac_cmd_pl *mac_pl = &frame->mac_pl;
+	struct ieee802154_hdr *mhr = &frame->mhr;
+	int ret;
+
+	skb_reserve(skb, sizeof(*mhr));
+	ret = ieee802154_hdr_push(skb, mhr);
+	if (ret < 0)
+		return ret;
+
+	skb_reset_mac_header(skb);
+	skb->mac_len = ret;
+
+	skb_put_data(skb, mac_pl, sizeof(*mac_pl));
+	skb_put_data(skb, pl, pl_len);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ieee802154_mac_cmd_push);
+
+int ieee802154_beacon_push(struct sk_buff *skb,
+			   struct ieee802154_beacon_frame *beacon)
+{
+	struct ieee802154_beacon_hdr *mac_pl = &beacon->mac_pl;
+	struct ieee802154_hdr *mhr = &beacon->mhr;
+	int ret;
+
+	skb_reserve(skb, sizeof(*mhr));
+	ret = ieee802154_hdr_push(skb, mhr);
+	if (ret < 0)
+		return ret;
+
+	skb_reset_mac_header(skb);
+	skb->mac_len = ret;
+
+	skb_put_data(skb, mac_pl, sizeof(*mac_pl));
+
+	if (mac_pl->pend_short_addr_count || mac_pl->pend_ext_addr_count)
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ieee802154_beacon_push);
+
+static int
+ieee802154_hdr_get_addr(const u8 *buf, int mode, bool omit_pan,
+			struct ieee802154_addr *addr)
+{
+	int pos = 0;
+
+	if (mode == IEEE802154_ADDR_NONE) {
+		memset(addr, 0, sizeof(*addr));
+		addr->mode = IEEE802154_ADDR_NONE;
+		return 0;
+	}
+
+	addr->mode = mode;
+
+	if (!omit_pan) {
+		memcpy(&addr->pan_id, buf + pos, 2);
+		pos += 2;
+	}
+
+	if (mode == IEEE802154_ADDR_SHORT) {
+		memcpy(&addr->short_addr, buf + pos, 2);
+		return pos + 2;
+	} else {
+		memcpy(&addr->extended_addr, buf + pos, IEEE802154_ADDR_LEN);
+		return pos + IEEE802154_ADDR_LEN;
+	}
+}
+
+static int ieee802154_hdr_addr_len(int mode, bool omit_pan)
+{
+	int pan_len = omit_pan ? 0 : 2;
+
+	switch (mode) {
+	case IEEE802154_ADDR_NONE: return 0;
+	case IEEE802154_ADDR_SHORT: return 2 + pan_len;
+	case IEEE802154_ADDR_LONG: return IEEE802154_ADDR_LEN + pan_len;
+	default: return -EINVAL;
+	}
+}
+
+static int
+ieee802154_hdr_get_sechdr(const u8 *buf, struct ieee802154_sechdr *hdr)
+{
+	int pos = 5;
+
+	memcpy(hdr, buf, 1);
+	memcpy(&hdr->frame_counter, buf + 1, 4);
+
+	switch (hdr->key_id_mode) {
+	case IEEE802154_SCF_KEY_IMPLICIT:
+		return pos;
+
+	case IEEE802154_SCF_KEY_INDEX:
+		break;
+
+	case IEEE802154_SCF_KEY_SHORT_INDEX:
+		memcpy(&hdr->short_src, buf + pos, 4);
+		pos += 4;
+		break;
+
+	case IEEE802154_SCF_KEY_HW_INDEX:
+		memcpy(&hdr->extended_src, buf + pos, IEEE802154_ADDR_LEN);
+		pos += IEEE802154_ADDR_LEN;
+		break;
+	}
+
+	hdr->key_id = buf[pos++];
+
+	return pos;
+}
+
+static int ieee802154_sechdr_lengths[4] = {
+	[IEEE802154_SCF_KEY_IMPLICIT] = 5,
+	[IEEE802154_SCF_KEY_INDEX] = 6,
+	[IEEE802154_SCF_KEY_SHORT_INDEX] = 10,
+	[IEEE802154_SCF_KEY_HW_INDEX] = 14,
+};
+
+static int ieee802154_hdr_sechdr_len(u8 sc)
+{
+	return ieee802154_sechdr_lengths[IEEE802154_SCF_KEY_ID_MODE(sc)];
+}
+
+static int ieee802154_hdr_minlen(const struct ieee802154_hdr *hdr)
+{
+	int dlen, slen;
+
+	dlen = ieee802154_hdr_addr_len(hdr->fc.dest_addr_mode, false);
+	slen = ieee802154_hdr_addr_len(hdr->fc.source_addr_mode,
+				       hdr->fc.intra_pan);
+
+	if (slen < 0 || dlen < 0)
+		return -EINVAL;
+
+	return 3 + dlen + slen + hdr->fc.security_enabled;
+}
+
+static int
+ieee802154_hdr_get_addrs(const u8 *buf, struct ieee802154_hdr *hdr)
+{
+	int pos = 0;
+
+	pos += ieee802154_hdr_get_addr(buf + pos, hdr->fc.dest_addr_mode,
+				       false, &hdr->dest);
+	pos += ieee802154_hdr_get_addr(buf + pos, hdr->fc.source_addr_mode,
+				       hdr->fc.intra_pan, &hdr->source);
+
+	if (hdr->fc.intra_pan)
+		hdr->source.pan_id = hdr->dest.pan_id;
+
+	return pos;
+}
+
+int
+ieee802154_hdr_pull(struct sk_buff *skb, struct ieee802154_hdr *hdr)
+{
+	int pos = 3, rc;
+
+	if (!pskb_may_pull(skb, 3))
+		return -EINVAL;
+
+	memcpy(hdr, skb->data, 3);
+
+	rc = ieee802154_hdr_minlen(hdr);
+	if (rc < 0 || !pskb_may_pull(skb, rc))
+		return -EINVAL;
+
+	pos += ieee802154_hdr_get_addrs(skb->data + pos, hdr);
+
+	if (hdr->fc.security_enabled) {
+		int want = pos + ieee802154_hdr_sechdr_len(skb->data[pos]);
+
+		if (!pskb_may_pull(skb, want))
+			return -EINVAL;
+
+		pos += ieee802154_hdr_get_sechdr(skb->data + pos, &hdr->sec);
+	}
+
+	skb_pull(skb, pos);
+	return pos;
+}
+EXPORT_SYMBOL_GPL(ieee802154_hdr_pull);
+
+int ieee802154_mac_cmd_pl_pull(struct sk_buff *skb,
+			       struct ieee802154_mac_cmd_pl *mac_pl)
+{
+	if (!pskb_may_pull(skb, sizeof(*mac_pl)))
+		return -EINVAL;
+
+	memcpy(mac_pl, skb->data, sizeof(*mac_pl));
+	skb_pull(skb, sizeof(*mac_pl));
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ieee802154_mac_cmd_pl_pull);
+
+int
+ieee802154_hdr_peek_addrs(const struct sk_buff *skb, struct ieee802154_hdr *hdr)
+{
+	const u8 *buf = skb_mac_header(skb);
+	int pos = 3, rc;
+
+	if (buf + 3 > skb_tail_pointer(skb))
+		return -EINVAL;
+
+	memcpy(hdr, buf, 3);
+
+	rc = ieee802154_hdr_minlen(hdr);
+	if (rc < 0 || buf + rc > skb_tail_pointer(skb))
+		return -EINVAL;
+
+	pos += ieee802154_hdr_get_addrs(buf + pos, hdr);
+	return pos;
+}
+EXPORT_SYMBOL_GPL(ieee802154_hdr_peek_addrs);
+
+int
+ieee802154_hdr_peek(const struct sk_buff *skb, struct ieee802154_hdr *hdr)
+{
+	const u8 *buf = skb_mac_header(skb);
+	int pos;
+
+	pos = ieee802154_hdr_peek_addrs(skb, hdr);
+	if (pos < 0)
+		return -EINVAL;
+
+	if (hdr->fc.security_enabled) {
+		u8 key_id_mode = IEEE802154_SCF_KEY_ID_MODE(*(buf + pos));
+		int want = pos + ieee802154_sechdr_lengths[key_id_mode];
+
+		if (buf + want > skb_tail_pointer(skb))
+			return -EINVAL;
+
+		pos += ieee802154_hdr_get_sechdr(buf + pos, &hdr->sec);
+	}
+
+	return pos;
+}
+EXPORT_SYMBOL_GPL(ieee802154_hdr_peek);
+
+int ieee802154_max_payload(const struct ieee802154_hdr *hdr)
+{
+	int hlen = ieee802154_hdr_minlen(hdr);
+
+	if (hdr->fc.security_enabled) {
+		hlen += ieee802154_sechdr_lengths[hdr->sec.key_id_mode] - 1;
+		hlen += ieee802154_sechdr_authtag_len(&hdr->sec);
+	}
+
+	return IEEE802154_MTU - hlen - IEEE802154_MFR_SIZE;
+}
+EXPORT_SYMBOL_GPL(ieee802154_max_payload);