From: Jacob Keller <jacob.e.keller@intel.com>
Date: Thu, 12 Apr 2018 11:15:56 -0700
Subject: fm10k: use variadic arguments to fm10k_add_stat_strings
Patch-mainline: v4.18-rc1
Git-commit: d63bb21a7e722fcaa6cc6a217f21fe25a9e2c89e
References: bsc#1101813 FATE#325148
Instead of using a fixed prefix string we setup before each call to
fm10k_add_stat_strings, modify the helper to take variadic arguments and
pass them to vsnprintf. This requires changing the fm10k_stat strings to
take % format specifiers where necessary, but the resulting code is much
simpler.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c | 55 +++++++++++------------
1 file changed, 28 insertions(+), 27 deletions(-)
--- a/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
+++ b/drivers/net/ethernet/intel/fm10k/fm10k_ethtool.c
@@ -23,6 +23,11 @@
#include "fm10k.h"
struct fm10k_stats {
+ /* The stat_string is expected to be a format string formatted using
+ * vsnprintf by fm10k_add_stat_strings. Every member of a stats array
+ * should use the same format specifiers as they will be formatted
+ * using the same variadic arguments.
+ */
char stat_string[ETH_GSTRING_LEN];
int sizeof_stat;
int stat_offset;
@@ -111,15 +116,13 @@ static const struct fm10k_stats fm10k_gs
FM10K_MBX_STAT("mbx_rx_mbmem_pushed", rx_mbmem_pushed),
};
-#define FM10K_QUEUE_STAT(_name, _stat) { \
- .stat_string = _name, \
- .sizeof_stat = FIELD_SIZEOF(struct fm10k_ring, _stat), \
- .stat_offset = offsetof(struct fm10k_ring, _stat) \
-}
+/* per-queue ring statistics */
+#define FM10K_QUEUE_STAT(_name, _stat) \
+ FM10K_STAT_FIELDS(struct fm10k_ring, _name, _stat)
static const struct fm10k_stats fm10k_gstrings_queue_stats[] = {
- FM10K_QUEUE_STAT("packets", stats.packets),
- FM10K_QUEUE_STAT("bytes", stats.bytes),
+ FM10K_QUEUE_STAT("%s_queue_%u_packets", stats.packets),
+ FM10K_QUEUE_STAT("%s_queue_%u_bytes", stats.bytes),
};
#define FM10K_GLOBAL_STATS_LEN ARRAY_SIZE(fm10k_gstrings_global_stats)
@@ -149,16 +152,18 @@ enum {
static const char fm10k_prv_flags[FM10K_PRV_FLAG_LEN][ETH_GSTRING_LEN] = {
};
-static void fm10k_add_stat_strings(u8 **p, const char *prefix,
- const struct fm10k_stats stats[],
- const unsigned int size)
+static void fm10k_add_stat_strings(u8 **p, const struct fm10k_stats stats[],
+ const unsigned int size, ...)
{
unsigned int i;
for (i = 0; i < size; i++) {
- snprintf(*p, ETH_GSTRING_LEN, "%s%s",
- prefix, stats[i].stat_string);
+ va_list args;
+
+ va_start(args, size);
+ vsnprintf(*p, ETH_GSTRING_LEN, stats[i].stat_string, args);
*p += ETH_GSTRING_LEN;
+ va_end(args);
}
}
@@ -167,31 +172,27 @@ static void fm10k_get_stat_strings(struc
struct fm10k_intfc *interface = netdev_priv(dev);
unsigned int i;
- fm10k_add_stat_strings(&data, "", fm10k_gstrings_net_stats,
+ fm10k_add_stat_strings(&data, fm10k_gstrings_net_stats,
FM10K_NETDEV_STATS_LEN);
- fm10k_add_stat_strings(&data, "", fm10k_gstrings_global_stats,
+ fm10k_add_stat_strings(&data, fm10k_gstrings_global_stats,
FM10K_GLOBAL_STATS_LEN);
- fm10k_add_stat_strings(&data, "", fm10k_gstrings_mbx_stats,
+ fm10k_add_stat_strings(&data, fm10k_gstrings_mbx_stats,
FM10K_MBX_STATS_LEN);
if (interface->hw.mac.type != fm10k_mac_vf)
- fm10k_add_stat_strings(&data, "", fm10k_gstrings_pf_stats,
+ fm10k_add_stat_strings(&data, fm10k_gstrings_pf_stats,
FM10K_PF_STATS_LEN);
for (i = 0; i < interface->hw.mac.max_queues; i++) {
- char prefix[ETH_GSTRING_LEN];
-
- snprintf(prefix, ETH_GSTRING_LEN, "tx_queue_%u_", i);
- fm10k_add_stat_strings(&data, prefix,
- fm10k_gstrings_queue_stats,
- FM10K_QUEUE_STATS_LEN);
-
- snprintf(prefix, ETH_GSTRING_LEN, "rx_queue_%u_", i);
- fm10k_add_stat_strings(&data, prefix,
- fm10k_gstrings_queue_stats,
- FM10K_QUEUE_STATS_LEN);
+ fm10k_add_stat_strings(&data, fm10k_gstrings_queue_stats,
+ FM10K_QUEUE_STATS_LEN,
+ "tx", i);
+
+ fm10k_add_stat_strings(&data, fm10k_gstrings_queue_stats,
+ FM10K_QUEUE_STATS_LEN,
+ "rx", i);
}
}