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Date: Tue, 24 Aug 2010 07:31:41 +0200
From: Eric Dumazet <eric.dumazet@...il.com>
To: David Miller <davem@...emloft.net>
Cc: rmody@...cade.com, netdev@...r.kernel.org, amathur@...cade.com,
ddutt@...cade.com, huangj@...cade.com
Subject: [PATCH net-next-2.6] bna: fix stats handling
Brocade guys, could you please test the following patch on your
hardware ?
Thanks
[PATCH net-next-2.6] bna: fix stats handling
get_stats() method incorrectly clears a global array before folding
various stats. This can break SNMP applications.
Switch to 64 bit flavor to work on a user supplied buffer, and provide
64bit counters even on 32bit arches.
Fix a bug in bnad_netdev_hwstats_fill(), for rx_fifo_errors, missing a
folding (only the last counter was taken into account)
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
drivers/net/bna/bnad.c | 52 ++++++++++++++-----------------
drivers/net/bna/bnad.h | 5 +-
drivers/net/bna/bnad_ethtool.c | 17 ++++------
3 files changed, 33 insertions(+), 41 deletions(-)
diff --git a/drivers/net/bna/bnad.c b/drivers/net/bna/bnad.c
index 491d148..a935b96 100644
--- a/drivers/net/bna/bnad.c
+++ b/drivers/net/bna/bnad.c
@@ -1964,25 +1964,24 @@ bnad_enable_default_bcast(struct bnad *bnad)
/* Statistics utilities */
void
-bnad_netdev_qstats_fill(struct bnad *bnad)
+bnad_netdev_qstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats)
{
- struct net_device_stats *net_stats = &bnad->net_stats;
int i, j;
for (i = 0; i < bnad->num_rx; i++) {
for (j = 0; j < bnad->num_rxp_per_rx; j++) {
if (bnad->rx_info[i].rx_ctrl[j].ccb) {
- net_stats->rx_packets += bnad->rx_info[i].
+ stats->rx_packets += bnad->rx_info[i].
rx_ctrl[j].ccb->rcb[0]->rxq->rx_packets;
- net_stats->rx_bytes += bnad->rx_info[i].
+ stats->rx_bytes += bnad->rx_info[i].
rx_ctrl[j].ccb->rcb[0]->rxq->rx_bytes;
if (bnad->rx_info[i].rx_ctrl[j].ccb->rcb[1] &&
bnad->rx_info[i].rx_ctrl[j].ccb->
rcb[1]->rxq) {
- net_stats->rx_packets +=
+ stats->rx_packets +=
bnad->rx_info[i].rx_ctrl[j].
ccb->rcb[1]->rxq->rx_packets;
- net_stats->rx_bytes +=
+ stats->rx_bytes +=
bnad->rx_info[i].rx_ctrl[j].
ccb->rcb[1]->rxq->rx_bytes;
}
@@ -1992,9 +1991,9 @@ bnad_netdev_qstats_fill(struct bnad *bnad)
for (i = 0; i < bnad->num_tx; i++) {
for (j = 0; j < bnad->num_txq_per_tx; j++) {
if (bnad->tx_info[i].tcb[j]) {
- net_stats->tx_packets +=
+ stats->tx_packets +=
bnad->tx_info[i].tcb[j]->txq->tx_packets;
- net_stats->tx_bytes +=
+ stats->tx_bytes +=
bnad->tx_info[i].tcb[j]->txq->tx_bytes;
}
}
@@ -2005,37 +2004,36 @@ bnad_netdev_qstats_fill(struct bnad *bnad)
* Must be called with the bna_lock held.
*/
void
-bnad_netdev_hwstats_fill(struct bnad *bnad)
+bnad_netdev_hwstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats)
{
struct bfi_ll_stats_mac *mac_stats;
- struct net_device_stats *net_stats = &bnad->net_stats;
u64 bmap;
int i;
mac_stats = &bnad->stats.bna_stats->hw_stats->mac_stats;
- net_stats->rx_errors =
+ stats->rx_errors =
mac_stats->rx_fcs_error + mac_stats->rx_alignment_error +
mac_stats->rx_frame_length_error + mac_stats->rx_code_error +
mac_stats->rx_undersize;
- net_stats->tx_errors = mac_stats->tx_fcs_error +
+ stats->tx_errors = mac_stats->tx_fcs_error +
mac_stats->tx_undersize;
- net_stats->rx_dropped = mac_stats->rx_drop;
- net_stats->tx_dropped = mac_stats->tx_drop;
- net_stats->multicast = mac_stats->rx_multicast;
- net_stats->collisions = mac_stats->tx_total_collision;
+ stats->rx_dropped = mac_stats->rx_drop;
+ stats->tx_dropped = mac_stats->tx_drop;
+ stats->multicast = mac_stats->rx_multicast;
+ stats->collisions = mac_stats->tx_total_collision;
- net_stats->rx_length_errors = mac_stats->rx_frame_length_error;
+ stats->rx_length_errors = mac_stats->rx_frame_length_error;
/* receive ring buffer overflow ?? */
- net_stats->rx_crc_errors = mac_stats->rx_fcs_error;
- net_stats->rx_frame_errors = mac_stats->rx_alignment_error;
+ stats->rx_crc_errors = mac_stats->rx_fcs_error;
+ stats->rx_frame_errors = mac_stats->rx_alignment_error;
/* recv'r fifo overrun */
bmap = (u64)bnad->stats.bna_stats->rxf_bmap[0] |
((u64)bnad->stats.bna_stats->rxf_bmap[1] << 32);
for (i = 0; bmap && (i < BFI_LL_RXF_ID_MAX); i++) {
if (bmap & 1) {
- net_stats->rx_fifo_errors =
+ stats->rx_fifo_errors +=
bnad->stats.bna_stats->
hw_stats->rxf_stats[i].frame_drops;
break;
@@ -2638,22 +2636,20 @@ bnad_start_xmit(struct sk_buff *skb, struct net_device *netdev)
* Used spin_lock to synchronize reading of stats structures, which
* is written by BNA under the same lock.
*/
-static struct net_device_stats *
-bnad_get_netdev_stats(struct net_device *netdev)
+static struct rtnl_link_stats64 *
+bnad_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
{
struct bnad *bnad = netdev_priv(netdev);
unsigned long flags;
spin_lock_irqsave(&bnad->bna_lock, flags);
- memset(&bnad->net_stats, 0, sizeof(struct net_device_stats));
-
- bnad_netdev_qstats_fill(bnad);
- bnad_netdev_hwstats_fill(bnad);
+ bnad_netdev_qstats_fill(bnad, stats);
+ bnad_netdev_hwstats_fill(bnad, stats);
spin_unlock_irqrestore(&bnad->bna_lock, flags);
- return &bnad->net_stats;
+ return stats;
}
static void
@@ -2858,7 +2854,7 @@ static const struct net_device_ops bnad_netdev_ops = {
.ndo_open = bnad_open,
.ndo_stop = bnad_stop,
.ndo_start_xmit = bnad_start_xmit,
- .ndo_get_stats = bnad_get_netdev_stats,
+ .ndo_get_stats64 = bnad_get_stats64,
.ndo_set_rx_mode = bnad_set_rx_mode,
.ndo_set_multicast_list = bnad_set_rx_mode,
.ndo_validate_addr = eth_validate_addr,
diff --git a/drivers/net/bna/bnad.h b/drivers/net/bna/bnad.h
index 3261401..ee37788 100644
--- a/drivers/net/bna/bnad.h
+++ b/drivers/net/bna/bnad.h
@@ -273,7 +273,6 @@ struct bnad {
/* Statistics */
struct bnad_stats stats;
- struct net_device_stats net_stats;
struct bnad_diag *diag;
@@ -308,8 +307,8 @@ extern void bnad_cleanup_rx(struct bnad *bnad, uint rx_id);
extern void bnad_dim_timer_start(struct bnad *bnad);
/* Statistics */
-extern void bnad_netdev_qstats_fill(struct bnad *bnad);
-extern void bnad_netdev_hwstats_fill(struct bnad *bnad);
+extern void bnad_netdev_qstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats);
+extern void bnad_netdev_hwstats_fill(struct bnad *bnad, struct rtnl_link_stats64 *stats);
/**
* MACROS
diff --git a/drivers/net/bna/bnad_ethtool.c b/drivers/net/bna/bnad_ethtool.c
index 7e630f5..1f0c124 100644
--- a/drivers/net/bna/bnad_ethtool.c
+++ b/drivers/net/bna/bnad_ethtool.c
@@ -34,7 +34,7 @@
#define BNAD_NUM_TXQ_COUNTERS 5
#define BNAD_ETHTOOL_STATS_NUM \
- (sizeof(struct net_device_stats) / sizeof(unsigned long) + \
+ (sizeof(struct rtnl_link_stats64) / sizeof(u64) + \
sizeof(struct bnad_drv_stats) / sizeof(u64) + \
offsetof(struct bfi_ll_stats, rxf_stats[0]) / sizeof(u64))
@@ -1159,7 +1159,8 @@ bnad_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats *stats,
{
struct bnad *bnad = netdev_priv(netdev);
int i, j, bi;
- unsigned long *net_stats, flags;
+ unsigned long flags;
+ struct rtnl_link_stats64 *net_stats64;
u64 *stats64;
u64 bmap;
@@ -1176,16 +1177,12 @@ bnad_get_ethtool_stats(struct net_device *netdev, struct ethtool_stats *stats,
spin_lock_irqsave(&bnad->bna_lock, flags);
bi = 0;
memset(buf, 0, stats->n_stats * sizeof(u64));
- memset(&bnad->net_stats, 0, sizeof(struct net_device_stats));
- bnad_netdev_qstats_fill(bnad);
- bnad_netdev_hwstats_fill(bnad);
+ net_stats64 = (struct rtnl_link_stats64 *)buf;
+ bnad_netdev_qstats_fill(bnad, net_stats64);
+ bnad_netdev_hwstats_fill(bnad, net_stats64);
- /* Fill net_stats into ethtool buffers */
- net_stats = (unsigned long *)&bnad->net_stats;
- for (i = 0; i < sizeof(struct net_device_stats) / sizeof(unsigned long);
- i++)
- buf[bi++] = net_stats[i];
+ bi = sizeof(*net_stats64) / sizeof(u64);
/* Fill driver stats into ethtool buffers */
stats64 = (u64 *)&bnad->stats.drv_stats;
--
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