netdev - [PATCHv2 4/5] pktgen: Remove brute-force printing of flags

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20180118183137.16053-5-dima@arista.com>
Date:   Thu, 18 Jan 2018 18:31:36 +0000
From:   Dmitry Safonov <dima@...sta.com>
To:     linux-kernel@...r.kernel.org
Cc:     Dmitry Safonov <dima@...sta.com>, Arnd Bergmann <arnd@...db.de>,
        "David S. Miller" <davem@...emloft.net>,
        David Windsor <dwindsor@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Ingo Molnar <mingo@...nel.org>,
        Johannes Berg <johannes.berg@...el.com>,
        Mark Rutland <mark.rutland@....com>,
        Radu Rendec <rrendec@...sta.com>,
        "Reshetova, Elena" <elena.reshetova@...el.com>,
        netdev@...r.kernel.org
Subject: [PATCHv2 4/5] pktgen: Remove brute-force printing of flags

Add macro generated pkt_flag_names array, with a little help of which
the flags can be printed by using an index.

Signed-off-by: Dmitry Safonov <dima@...sta.com>
---
 net/core/pktgen.c | 77 ++++++++++++++-----------------------------------------
 1 file changed, 19 insertions(+), 58 deletions(-)

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index 596fadcd8bb8..f9883139e311 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -215,6 +215,14 @@ enum pkt_flags {
 PKT_FLAGS
 #undef pf
 
+#define pf(flag)		__stringify(flag),
+static char *pkt_flag_names[] = {
+	PKT_FLAGS
+};
+#undef pf
+
+#define NR_PKT_FLAGS		ARRAY_SIZE(pkt_flag_names)
+
 /* Thread control flag bits */
 #define T_STOP        (1<<0)	/* Stop run */
 #define T_RUN         (1<<1)	/* Start run */
@@ -546,6 +554,7 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
 {
 	const struct pktgen_dev *pkt_dev = seq->private;
 	ktime_t stopped;
+	unsigned int i;
 	u64 idle;
 
 	seq_printf(seq,
@@ -607,7 +616,6 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
 		   pkt_dev->src_mac_count, pkt_dev->dst_mac_count);
 
 	if (pkt_dev->nr_labels) {
-		unsigned int i;
 		seq_puts(seq, "     mpls: ");
 		for (i = 0; i < pkt_dev->nr_labels; i++)
 			seq_printf(seq, "%08x%s", ntohl(pkt_dev->labels[i]),
@@ -643,68 +651,21 @@ static int pktgen_if_show(struct seq_file *seq, void *v)
 
 	seq_puts(seq, "     Flags: ");
 
-	if (pkt_dev->flags & F_IPV6)
-		seq_puts(seq, "IPV6  ");
-
-	if (pkt_dev->flags & F_IPSRC_RND)
-		seq_puts(seq, "IPSRC_RND  ");
-
-	if (pkt_dev->flags & F_IPDST_RND)
-		seq_puts(seq, "IPDST_RND  ");
-
-	if (pkt_dev->flags & F_TXSIZE_RND)
-		seq_puts(seq, "TXSIZE_RND  ");
-
-	if (pkt_dev->flags & F_UDPSRC_RND)
-		seq_puts(seq, "UDPSRC_RND  ");
-
-	if (pkt_dev->flags & F_UDPDST_RND)
-		seq_puts(seq, "UDPDST_RND  ");
-
-	if (pkt_dev->flags & F_UDPCSUM)
-		seq_puts(seq, "UDPCSUM  ");
-
-	if (pkt_dev->flags & F_NO_TIMESTAMP)
-		seq_puts(seq, "NO_TIMESTAMP  ");
-
-	if (pkt_dev->flags & F_MPLS_RND)
-		seq_puts(seq,  "MPLS_RND  ");
-
-	if (pkt_dev->flags & F_QUEUE_MAP_RND)
-		seq_puts(seq,  "QUEUE_MAP_RND  ");
-
-	if (pkt_dev->flags & F_QUEUE_MAP_CPU)
-		seq_puts(seq,  "QUEUE_MAP_CPU  ");
+	for (i = 0; i < NR_PKT_FLAGS; i++) {
+		if (i == F_FLOW_SEQ)
+			if (!pkt_dev->cflows)
+				continue;
 
-	if (pkt_dev->cflows) {
-		if (pkt_dev->flags & F_FLOW_SEQ)
-			seq_puts(seq,  "FLOW_SEQ  "); /*in sequence flows*/
-		else
-			seq_puts(seq,  "FLOW_RND  ");
-	}
+		if (pkt_dev->flags & (1 << i))
+			seq_printf(seq, "%s  ", pkt_flag_names[i]);
+		else if (i == F_FLOW_SEQ)
+			seq_puts(seq, "FLOW_RND  ");
 
 #ifdef CONFIG_XFRM
-	if (pkt_dev->flags & F_IPSEC) {
-		seq_puts(seq,  "IPSEC  ");
-		if (pkt_dev->spi)
+		if (i == F_IPSEC && pkt_dev->spi)
 			seq_printf(seq, "spi:%u", pkt_dev->spi);
-	}
 #endif
-
-	if (pkt_dev->flags & F_MACSRC_RND)
-		seq_puts(seq, "MACSRC_RND  ");
-
-	if (pkt_dev->flags & F_MACDST_RND)
-		seq_puts(seq, "MACDST_RND  ");
-
-	if (pkt_dev->flags & F_VID_RND)
-		seq_puts(seq, "VID_RND  ");
-
-	if (pkt_dev->flags & F_SVID_RND)
-		seq_puts(seq, "SVID_RND  ");
-
-	if (pkt_dev->flags & F_NODE)
-		seq_puts(seq, "NODE_ALLOC  ");
+	}
 
 	seq_puts(seq, "\n");
 
-- 
2.13.6