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authorMoshe Shemesh <moshe@mellanox.com>2020-10-07 09:00:45 +0300
committerJakub Kicinski <kuba@kernel.org>2020-10-09 12:06:52 -0700
commita254c264267e8746fb257806c166e54375cf9c06 (patch)
tree710dd421e33fee3a208cd03f17b367c726472df1
parentdc64cc7c63102ac78bac3cfbc00ef3abd7a3fdf3 (diff)
devlink: Add reload stats
Add reload stats to hold the history per reload action type and limit. For example, the number of times fw_activate has been performed on this device since the driver module was added or if the firmware activation was performed with or without reset. Add devlink notification on stats update. Expose devlink reload stats to the user through devlink dev get command. Examples: $ devlink dev show pci/0000:82:00.0: stats: reload: driver_reinit 2 fw_activate 1 fw_activate_no_reset 0 pci/0000:82:00.1: stats: reload: driver_reinit 1 fw_activate 0 fw_activate_no_reset 0 $ devlink dev show -jp { "dev": { "pci/0000:82:00.0": { "stats": { "reload": { "driver_reinit": 2, "fw_activate": 1, "fw_activate_no_reset": 0 } } }, "pci/0000:82:00.1": { "stats": { "reload": { "driver_reinit": 1, "fw_activate": 0, "fw_activate_no_reset": 0 } } } } } Signed-off-by: Moshe Shemesh <moshe@mellanox.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-rw-r--r--include/net/devlink.h8
-rw-r--r--include/uapi/linux/devlink.h6
-rw-r--r--net/core/devlink.c90
3 files changed, 104 insertions, 0 deletions
diff --git a/include/net/devlink.h b/include/net/devlink.h
index 9f5c37c391f8..d091c6ba82ce 100644
--- a/include/net/devlink.h
+++ b/include/net/devlink.h
@@ -20,6 +20,13 @@
#include <uapi/linux/devlink.h>
#include <linux/xarray.h>
+#define DEVLINK_RELOAD_STATS_ARRAY_SIZE \
+ (__DEVLINK_RELOAD_LIMIT_MAX * __DEVLINK_RELOAD_ACTION_MAX)
+
+struct devlink_dev_stats {
+ u32 reload_stats[DEVLINK_RELOAD_STATS_ARRAY_SIZE];
+};
+
struct devlink_ops;
struct devlink {
@@ -38,6 +45,7 @@ struct devlink {
struct list_head trap_policer_list;
const struct devlink_ops *ops;
struct xarray snapshot_ids;
+ struct devlink_dev_stats stats;
struct device *dev;
possible_net_t _net;
struct mutex lock; /* Serializes access to devlink instance specific objects such as
diff --git a/include/uapi/linux/devlink.h b/include/uapi/linux/devlink.h
index 82a5e66c1518..ab15fc597b74 100644
--- a/include/uapi/linux/devlink.h
+++ b/include/uapi/linux/devlink.h
@@ -520,6 +520,12 @@ enum devlink_attr {
DEVLINK_ATTR_RELOAD_ACTIONS_PERFORMED, /* bitfield32 */
DEVLINK_ATTR_RELOAD_LIMITS, /* bitfield32 */
+ DEVLINK_ATTR_DEV_STATS, /* nested */
+ DEVLINK_ATTR_RELOAD_STATS, /* nested */
+ DEVLINK_ATTR_RELOAD_STATS_ENTRY, /* nested */
+ DEVLINK_ATTR_RELOAD_STATS_LIMIT, /* u8 */
+ DEVLINK_ATTR_RELOAD_STATS_VALUE, /* u32 */
+
/* add new attributes above here, update the policy in devlink.c */
__DEVLINK_ATTR_MAX,
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 28b63faa3c6b..a167c3bb468c 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -517,10 +517,66 @@ devlink_reload_limit_is_supported(struct devlink *devlink, enum devlink_reload_l
return test_bit(limit, &devlink->ops->reload_limits);
}
+static int devlink_reload_stat_put(struct sk_buff *msg, enum devlink_reload_action action,
+ enum devlink_reload_limit limit, u32 value)
+{
+ struct nlattr *reload_stats_entry;
+
+ reload_stats_entry = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS_ENTRY);
+ if (!reload_stats_entry)
+ return -EMSGSIZE;
+
+ if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_ACTION, action) ||
+ nla_put_u8(msg, DEVLINK_ATTR_RELOAD_STATS_LIMIT, limit) ||
+ nla_put_u32(msg, DEVLINK_ATTR_RELOAD_STATS_VALUE, value))
+ goto nla_put_failure;
+ nla_nest_end(msg, reload_stats_entry);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, reload_stats_entry);
+ return -EMSGSIZE;
+}
+
+static int devlink_reload_stats_put(struct sk_buff *msg, struct devlink *devlink)
+{
+ struct nlattr *reload_stats_attr;
+ int i, j, stat_idx;
+ u32 value;
+
+ reload_stats_attr = nla_nest_start(msg, DEVLINK_ATTR_RELOAD_STATS);
+
+ if (!reload_stats_attr)
+ return -EMSGSIZE;
+
+ for (j = 0; j <= DEVLINK_RELOAD_LIMIT_MAX; j++) {
+ if (j != DEVLINK_RELOAD_LIMIT_UNSPEC &&
+ !devlink_reload_limit_is_supported(devlink, j))
+ continue;
+ for (i = 0; i <= DEVLINK_RELOAD_ACTION_MAX; i++) {
+ if (!devlink_reload_action_is_supported(devlink, i) ||
+ devlink_reload_combination_is_invalid(i, j))
+ continue;
+
+ stat_idx = j * __DEVLINK_RELOAD_ACTION_MAX + i;
+ value = devlink->stats.reload_stats[stat_idx];
+ if (devlink_reload_stat_put(msg, i, j, value))
+ goto nla_put_failure;
+ }
+ }
+ nla_nest_end(msg, reload_stats_attr);
+ return 0;
+
+nla_put_failure:
+ nla_nest_cancel(msg, reload_stats_attr);
+ return -EMSGSIZE;
+}
+
static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
enum devlink_command cmd, u32 portid,
u32 seq, int flags)
{
+ struct nlattr *dev_stats;
void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
@@ -532,9 +588,19 @@ static int devlink_nl_fill(struct sk_buff *msg, struct devlink *devlink,
if (nla_put_u8(msg, DEVLINK_ATTR_RELOAD_FAILED, devlink->reload_failed))
goto nla_put_failure;
+ dev_stats = nla_nest_start(msg, DEVLINK_ATTR_DEV_STATS);
+ if (!dev_stats)
+ goto nla_put_failure;
+
+ if (devlink_reload_stats_put(msg, devlink))
+ goto dev_stats_nest_cancel;
+
+ nla_nest_end(msg, dev_stats);
genlmsg_end(msg, hdr);
return 0;
+dev_stats_nest_cancel:
+ nla_nest_cancel(msg, dev_stats);
nla_put_failure:
genlmsg_cancel(msg, hdr);
return -EMSGSIZE;
@@ -3021,6 +3087,29 @@ bool devlink_is_reload_failed(const struct devlink *devlink)
}
EXPORT_SYMBOL_GPL(devlink_is_reload_failed);
+static void
+__devlink_reload_stats_update(struct devlink *devlink, u32 *reload_stats,
+ enum devlink_reload_limit limit, u32 actions_performed)
+{
+ unsigned long actions = actions_performed;
+ int stat_idx;
+ int action;
+
+ for_each_set_bit(action, &actions, __DEVLINK_RELOAD_ACTION_MAX) {
+ stat_idx = limit * __DEVLINK_RELOAD_ACTION_MAX + action;
+ reload_stats[stat_idx]++;
+ }
+ devlink_notify(devlink, DEVLINK_CMD_NEW);
+}
+
+static void
+devlink_reload_stats_update(struct devlink *devlink, enum devlink_reload_limit limit,
+ u32 actions_performed)
+{
+ __devlink_reload_stats_update(devlink, devlink->stats.reload_stats, limit,
+ actions_performed);
+}
+
static int devlink_reload(struct devlink *devlink, struct net *dest_net,
enum devlink_reload_action action, enum devlink_reload_limit limit,
u32 *actions_performed, struct netlink_ext_ack *extack)
@@ -3043,6 +3132,7 @@ static int devlink_reload(struct devlink *devlink, struct net *dest_net,
return err;
WARN_ON(!(*actions_performed & BIT(action)));
+ devlink_reload_stats_update(devlink, limit, *actions_performed);
return 0;
}