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Message-Id: <1492498295-14385-6-git-send-email-gwshan@linux.vnet.ibm.com>
Date: Tue, 18 Apr 2017 16:51:32 +1000
From: Gavin Shan <gwshan@...ux.vnet.ibm.com>
To: netdev@...r.kernel.org
Cc: joe@...ches.com, kubakici@...pl, davem@...emloft.net,
Gavin Shan <gwshan@...ux.vnet.ibm.com>
Subject: [PATCH v3 net-next 5/8] net/ncsi: Dump NCSI packet statistics
This creates /sys/kernel/debug/ncsi/<eth0>/stats to dump the NCSI
packets sent and received over all packages and channels. It's useful
to diagnose NCSI problems, especially when NCSI packages and channels
aren't probed properly. The statistics can be gained from debugfs file
as below:
# cat /sys/kernel/debug/ncsi/eth0/stats
CMD OK TIMEOUT ERROR
=======================================
CIS 32 29 0
SP 10 7 0
DP 17 14 0
EC 1 0 0
ECNT 1 0 0
AE 1 0 0
GLS 11 0 0
SMA 1 0 0
EBF 1 0 0
GVI 2 0 0
GC 2 0 0
RSP OK TIMEOUT ERROR
=======================================
CIS 3 0 0
SP 3 0 0
DP 2 0 1
EC 1 0 0
ECNT 1 0 0
AE 1 0 0
GLS 11 0 0
SMA 1 0 0
EBF 1 0 0
GVI 0 0 2
GC 2 0 0
AEN OK TIMEOUT ERROR
=======================================
Signed-off-by: Gavin Shan <gwshan@...ux.vnet.ibm.com>
---
net/ncsi/internal.h | 17 ++++
net/ncsi/ncsi-aen.c | 13 ++-
net/ncsi/ncsi-cmd.c | 12 ++-
net/ncsi/ncsi-debug.c | 252 +++++++++++++++++++++++++++++++++++++++++++++++++
net/ncsi/ncsi-manage.c | 4 +
net/ncsi/ncsi-rsp.c | 11 ++-
6 files changed, 306 insertions(+), 3 deletions(-)
diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h
index e9ede4f..c0b50a9 100644
--- a/net/ncsi/internal.h
+++ b/net/ncsi/internal.h
@@ -282,7 +282,17 @@ struct ncsi_dev_priv {
struct work_struct work; /* For channel management */
struct packet_type ptype; /* NCSI packet Rx handler */
struct list_head node; /* Form NCSI device list */
+#define NCSI_PKT_STAT_OK 0
+#define NCSI_PKT_STAT_TIMEOUT 1
+#define NCSI_PKT_STAT_ERROR 2
+#define NCSI_PKT_STAT_MAX 3
#ifdef CONFIG_NET_NCSI_DEBUG
+ struct {
+ struct dentry *dentry;
+ unsigned long cmd[128][NCSI_PKT_STAT_MAX];
+ unsigned long rsp[128][NCSI_PKT_STAT_MAX];
+ unsigned long aen[256][NCSI_PKT_STAT_MAX];
+ } stats;
struct dentry *dentry; /* Procfs directory */
#endif
};
@@ -349,6 +359,8 @@ int ncsi_aen_handler(struct ncsi_dev_priv *ndp, struct sk_buff *skb);
/* Debugging functionality */
#ifdef CONFIG_NET_NCSI_DEBUG
int ncsi_dev_init_debug(struct ncsi_dev_priv *ndp);
+void ncsi_dev_update_stats(struct ncsi_dev_priv *ndp,
+ int type, int subtype, int errno);
void ncsi_dev_release_debug(struct ncsi_dev_priv *ndp);
int ncsi_package_init_debug(struct ncsi_package *np);
void ncsi_package_release_debug(struct ncsi_package *np);
@@ -360,6 +372,11 @@ static inline int ncsi_dev_init_debug(struct ncsi_dev_priv *ndp)
return -ENOTTY;
}
+static inline void ncsi_dev_update_stats(struct ncsi_dev_priv *ndp,
+ int type, int subtype, int errno)
+{
+}
+
static inline void ncsi_dev_release_debug(struct ncsi_dev_priv *ndp)
{
}
diff --git a/net/ncsi/ncsi-aen.c b/net/ncsi/ncsi-aen.c
index 6898e72..72bac7c 100644
--- a/net/ncsi/ncsi-aen.c
+++ b/net/ncsi/ncsi-aen.c
@@ -206,16 +206,27 @@ int ncsi_aen_handler(struct ncsi_dev_priv *ndp, struct sk_buff *skb)
}
if (!nah) {
+ ncsi_dev_update_stats(ndp, NCSI_PKT_AEN,
+ h->type, NCSI_PKT_STAT_ERROR);
netdev_warn(ndp->ndev.dev, "Invalid AEN (0x%x) received\n",
h->type);
return -ENOENT;
}
ret = ncsi_validate_aen_pkt(h, nah->payload);
- if (ret)
+ if (ret) {
+ ncsi_dev_update_stats(ndp, NCSI_PKT_AEN,
+ h->type, NCSI_PKT_STAT_ERROR);
goto out;
+ }
ret = nah->handler(ndp, h);
+ if (ret)
+ ncsi_dev_update_stats(ndp, NCSI_PKT_AEN,
+ h->type, NCSI_PKT_STAT_ERROR);
+ else
+ ncsi_dev_update_stats(ndp, NCSI_PKT_AEN,
+ h->type, NCSI_PKT_STAT_OK);
out:
consume_skb(skb);
return ret;
diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
index db7083b..9a8dac2 100644
--- a/net/ncsi/ncsi-cmd.c
+++ b/net/ncsi/ncsi-cmd.c
@@ -323,6 +323,8 @@ int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
}
if (!nch) {
+ ncsi_dev_update_stats(nca->ndp, nca->type,
+ 0, NCSI_PKT_STAT_ERROR);
netdev_err(nca->ndp->ndev.dev,
"Cannot send packet with type 0x%02x\n", nca->type);
return -ENOENT;
@@ -331,13 +333,18 @@ int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
/* Get packet payload length and allocate the request */
nca->payload = nch->payload;
nr = ncsi_alloc_command(nca);
- if (!nr)
+ if (!nr) {
+ ncsi_dev_update_stats(nca->ndp, nca->type,
+ 0, NCSI_PKT_STAT_ERROR);
return -ENOMEM;
+ }
/* Prepare the packet */
nca->id = nr->id;
ret = nch->handler(nr->cmd, nca);
if (ret) {
+ ncsi_dev_update_stats(nca->ndp, nca->type,
+ 0, NCSI_PKT_STAT_ERROR);
ncsi_free_request(nr);
return ret;
}
@@ -359,9 +366,12 @@ int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
skb_get(nr->cmd);
ret = dev_queue_xmit(nr->cmd);
if (ret < 0) {
+ ncsi_dev_update_stats(nca->ndp, nca->type,
+ 0, NCSI_PKT_STAT_ERROR);
ncsi_free_request(nr);
return ret;
}
+ ncsi_dev_update_stats(nca->ndp, nca->type, 0, NCSI_PKT_STAT_OK);
return 0;
}
diff --git a/net/ncsi/ncsi-debug.c b/net/ncsi/ncsi-debug.c
index f38483d..b6df895 100644
--- a/net/ncsi/ncsi-debug.c
+++ b/net/ncsi/ncsi-debug.c
@@ -23,6 +23,235 @@
#include "ncsi-pkt.h"
static struct dentry *ncsi_dentry;
+static const struct ncsi_pkt_handler {
+ unsigned char type;
+ const char *name;
+} ncsi_pkt_handlers[] = {
+ { NCSI_PKT_CMD_CIS, "CIS" },
+ { NCSI_PKT_CMD_SP, "SP" },
+ { NCSI_PKT_CMD_DP, "DP" },
+ { NCSI_PKT_CMD_EC, "EC" },
+ { NCSI_PKT_CMD_DC, "DC" },
+ { NCSI_PKT_CMD_RC, "RC" },
+ { NCSI_PKT_CMD_ECNT, "ECNT" },
+ { NCSI_PKT_CMD_DCNT, "DCNT" },
+ { NCSI_PKT_CMD_AE, "AE" },
+ { NCSI_PKT_CMD_SL, "SL" },
+ { NCSI_PKT_CMD_GLS, "GLS" },
+ { NCSI_PKT_CMD_SVF, "SVF" },
+ { NCSI_PKT_CMD_EV, "EV" },
+ { NCSI_PKT_CMD_DV, "DV" },
+ { NCSI_PKT_CMD_SMA, "SMA" },
+ { NCSI_PKT_CMD_EBF, "EBF" },
+ { NCSI_PKT_CMD_DBF, "DBF" },
+ { NCSI_PKT_CMD_EGMF, "EGMF" },
+ { NCSI_PKT_CMD_DGMF, "DGMF" },
+ { NCSI_PKT_CMD_SNFC, "SNFC" },
+ { NCSI_PKT_CMD_GVI, "GVI" },
+ { NCSI_PKT_CMD_GC, "GC" },
+ { NCSI_PKT_CMD_GP, "GP" },
+ { NCSI_PKT_CMD_GCPS, "GCPS" },
+ { NCSI_PKT_CMD_GNS, "GNS" },
+ { NCSI_PKT_CMD_GNPTS, "GNPTS" },
+ { NCSI_PKT_CMD_GPS, "GPS" },
+ { NCSI_PKT_CMD_OEM, "OEM" },
+ { NCSI_PKT_CMD_PLDM, "PLDM" },
+ { NCSI_PKT_CMD_GPUUID, "GPUUID" },
+};
+
+static bool ncsi_dev_stats_index(struct ncsi_dev_priv *ndp, loff_t pos,
+ unsigned long *type, unsigned long *index,
+ unsigned long *entries)
+{
+ const unsigned long ranges[3][2] = {
+ { 1,
+ ARRAY_SIZE(ndp->stats.cmd) - 1 },
+ { ranges[0][1] + 2,
+ ranges[1][0] + ARRAY_SIZE(ndp->stats.rsp) - 1 },
+ { ranges[1][1] + 2,
+ ranges[2][0] + ARRAY_SIZE(ndp->stats.aen) - 1 }
+ };
+ int i;
+
+ for (i = 0; i < 3; i++) {
+ if (pos == (ranges[i][0] - 1)) {
+ *index = i;
+ *entries = 0;
+ return true;
+ }
+
+ if (pos >= ranges[i][0] && pos <= ranges[i][1]) {
+ *type = i;
+ *index = (pos - ranges[i][0]);
+ *entries = NCSI_PKT_STAT_MAX;
+ return true;
+ }
+ }
+
+ return false;
+}
+
+static void *ncsi_dev_stats_data(struct ncsi_dev_priv *ndp, loff_t pos)
+{
+ unsigned long type, index, entries;
+ bool valid;
+
+ valid = ncsi_dev_stats_index(ndp, pos, &type, &index, &entries);
+ if (!valid)
+ return NULL;
+
+ /* The bits in return value are assigned as below:
+ *
+ * Bit[7:0]: Number of ulong entries
+ * Bit[23:8]: Offset to that specific data entry
+ * Bit[30:24]: Type of packet statistics
+ * Bit[31]: 0x1 as valid flag.
+ */
+ if (!entries)
+ index += ((unsigned long)SEQ_START_TOKEN);
+ else
+ index = (1 << 31) | (type << 24) | (index << 8) | entries;
+
+ return (void *)index;
+}
+
+static void *ncsi_dev_stats_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct ncsi_dev_priv *ndp = seq->private;
+ void *data;
+
+ data = ncsi_dev_stats_data(ndp, *pos);
+ ++(*pos);
+
+ return data;
+}
+
+static void *ncsi_dev_stats_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct ncsi_dev_priv *ndp = seq->private;
+ void *data;
+
+ data = ncsi_dev_stats_data(ndp, *pos);
+ ++(*pos);
+ return data;
+}
+
+static void ncsi_dev_stats_seq_stop(struct seq_file *seq, void *v)
+{
+}
+
+static const char *ncsi_pkt_type_name(unsigned int type)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ncsi_pkt_handlers); i++) {
+ if (ncsi_pkt_handlers[i].type == type)
+ return ncsi_pkt_handlers[i].name;
+ }
+
+ return "N/A";
+}
+
+static const char *ncsi_dev_stats_pkt_name(unsigned long type,
+ unsigned long index)
+{
+ switch (type) {
+ case 0: /* Command */
+ case 1: /* Response */
+ return ncsi_pkt_type_name(index);
+ case 2: /* AEN */
+ switch (index) {
+ case NCSI_PKT_AEN_LSC:
+ return "LSC";
+ case NCSI_PKT_AEN_CR:
+ return "CR";
+ case NCSI_PKT_AEN_HNCDSC:
+ return "HNCDSC";
+ default:
+ return "N/A";
+ }
+ }
+
+ return "N/A";
+}
+
+static int ncsi_dev_stats_seq_show(struct seq_file *seq, void *v)
+{
+ struct ncsi_dev_priv *ndp = seq->private;
+ unsigned long type, index, entries, *data;
+ const char *name;
+
+ if (v >= SEQ_START_TOKEN && v <= (SEQ_START_TOKEN + 2)) {
+ static const char * const header[] = { "CMD", "RSP", "AEN" };
+
+ seq_puts(seq, "\n");
+ seq_printf(seq, "%-12s %-8s %-8s %-8s\n",
+ header[v - SEQ_START_TOKEN],
+ "OK", "TIMEOUT", "ERROR");
+ seq_puts(seq, "=======================================\n");
+ return 0;
+ }
+
+ index = (unsigned long)v;
+ type = (index >> 24) & 0x7F;
+ entries = (index & 0xFF);
+ index = ((index >> 8) & 0xFFFF);
+ name = ncsi_dev_stats_pkt_name(type, index);
+ if (WARN_ON_ONCE(entries != NCSI_PKT_STAT_MAX))
+ return 0;
+
+ switch (type) {
+ case 0: /* Command */
+ data = &ndp->stats.cmd[0][0];
+ break;
+ case 1: /* Response */
+ data = &ndp->stats.rsp[0][0];
+ break;
+ case 2: /* AEN */
+ data = &ndp->stats.aen[0][0];
+ break;
+ default:
+ pr_warn("%s: Unsupported type %ld\n", __func__, type);
+ return 0;
+ }
+
+ data += (index * NCSI_PKT_STAT_MAX);
+ if (*data || *(data + 1) || *(data + 2)) {
+ seq_printf(seq, "%-12s %-8ld %-8ld %-8ld\n",
+ name, *data, *(data + 1), *(data + 2));
+ }
+
+ return 0;
+}
+
+static const struct seq_operations ncsi_dev_stats_seq_ops = {
+ .start = ncsi_dev_stats_seq_start,
+ .next = ncsi_dev_stats_seq_next,
+ .stop = ncsi_dev_stats_seq_stop,
+ .show = ncsi_dev_stats_seq_show,
+};
+
+static int ncsi_dev_stats_seq_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *sf;
+ int ret;
+
+ ret = seq_open(file, &ncsi_dev_stats_seq_ops);
+ if (!ret) {
+ sf = file->private_data;
+ sf->private = inode->i_private;
+ }
+
+ return ret;
+}
+
+static const struct file_operations ncsi_dev_stats_fops = {
+ .owner = THIS_MODULE,
+ .open = ncsi_dev_stats_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
int ncsi_dev_init_debug(struct ncsi_dev_priv *ndp)
{
@@ -45,11 +274,34 @@ int ncsi_dev_init_debug(struct ncsi_dev_priv *ndp)
return -ENOMEM;
}
+ ndp->stats.dentry = debugfs_create_file("stats", 0400, ndp->dentry,
+ ndp, &ncsi_dev_stats_fops);
+ if (!ndp->stats.dentry) {
+ pr_debug("Failed to create debugfs file 'ncsi/%s/stats'\n",
+ netdev_name(ndp->ndev.dev));
+ return -ENOMEM;
+ }
+
return 0;
}
+void ncsi_dev_update_stats(struct ncsi_dev_priv *ndp,
+ int type, int subtype, int errno)
+{
+ if (errno >= NCSI_PKT_STAT_MAX)
+ return;
+
+ if (type == NCSI_PKT_AEN)
+ ndp->stats.aen[subtype][errno]++;
+ else if (type >= 0x80)
+ ndp->stats.rsp[type - 0x80][errno]++;
+ else
+ ndp->stats.cmd[type][errno]++;
+}
+
void ncsi_dev_release_debug(struct ncsi_dev_priv *ndp)
{
+ debugfs_remove(ndp->stats.dentry);
debugfs_remove(ndp->dentry);
}
diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
index 84f1405..be7d907 100644
--- a/net/ncsi/ncsi-manage.c
+++ b/net/ncsi/ncsi-manage.c
@@ -530,6 +530,7 @@ static void ncsi_request_timeout(unsigned long data)
struct ncsi_request *nr = (struct ncsi_request *)data;
struct ncsi_dev_priv *ndp = nr->ndp;
unsigned long flags;
+ struct ncsi_pkt_hdr *hdr;
/* If the request already had associated response,
* let the response handler to release it.
@@ -542,6 +543,9 @@ static void ncsi_request_timeout(unsigned long data)
}
spin_unlock_irqrestore(&ndp->lock, flags);
+ hdr = (struct ncsi_pkt_hdr *)skb_network_header(nr->cmd);
+ ncsi_dev_update_stats(ndp, hdr->type, 0, NCSI_PKT_STAT_TIMEOUT);
+
/* Release the request */
ncsi_free_request(nr);
}
diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
index 087db77..a164eb1 100644
--- a/net/ncsi/ncsi-rsp.c
+++ b/net/ncsi/ncsi-rsp.c
@@ -998,6 +998,7 @@ int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
}
if (!nrh) {
+ ncsi_dev_update_stats(ndp, hdr->type, 0, NCSI_PKT_STAT_ERROR);
netdev_err(nd->dev, "Received unrecognized packet (0x%x)\n",
hdr->type);
return -ENOENT;
@@ -1007,12 +1008,14 @@ int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
spin_lock_irqsave(&ndp->lock, flags);
nr = &ndp->requests[hdr->id];
if (!nr->used) {
+ ncsi_dev_update_stats(ndp, hdr->type, 0, NCSI_PKT_STAT_TIMEOUT);
spin_unlock_irqrestore(&ndp->lock, flags);
return -ENODEV;
}
nr->rsp = skb;
if (!nr->enabled) {
+ ncsi_dev_update_stats(ndp, hdr->type, 0, NCSI_PKT_STAT_TIMEOUT);
spin_unlock_irqrestore(&ndp->lock, flags);
ret = -ENOENT;
goto out;
@@ -1024,11 +1027,17 @@ int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
if (payload < 0)
payload = ntohs(hdr->length);
ret = ncsi_validate_rsp_pkt(nr, payload);
- if (ret)
+ if (ret) {
+ ncsi_dev_update_stats(ndp, hdr->type, 0, NCSI_PKT_STAT_ERROR);
goto out;
+ }
/* Process the packet */
ret = nrh->handler(nr);
+ if (ret)
+ ncsi_dev_update_stats(ndp, hdr->type, 0, NCSI_PKT_STAT_ERROR);
+ else
+ ncsi_dev_update_stats(ndp, hdr->type, 0, NCSI_PKT_STAT_OK);
out:
ncsi_free_request(nr);
return ret;
--
2.7.4
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