devlink: Add reload stats to dev show

Show reload statistics through devlink dev show using devlink stats
flag. The reload statistics show the history per reload action type and
limit. Add remote reload statistics to show the history of actions
performed due devlink reload commands initiated by remote host.

Output examples:
$ devlink dev show -s
pci/0000:82:00.0:
  stats:
      reload:
          driver_reinit:
            unspecified 2
          fw_activate:
            unspecified 1 no_reset 0
      remote_reload:
          driver_reinit:
            unspecified 0
          fw_activate:
            unspecified 0 no_reset 0
pci/0000:82:00.1:
  stats:
      reload:
          driver_reinit:
            unspecified 0
          fw_activate:
            unspecified 0 no_reset 0
      remote_reload:
          driver_reinit:
            unspecified 1
          fw_activate:
            unspecified 1 no_reset 0

$ devlink dev show -s -jp
{
    "dev": {
        "pci/0000:82:00.0": {
            "stats": {
                "reload": {
                    "driver_reinit": {
                        "unspecified": 2
                    },
                    "fw_activate": {
                        "unspecified": 1,
                        "no_reset": 0
                    }
                },
                "remote_reload": {
                    "driver_reinit": {
                        "unspecified": 0
                    },
                    "fw_activate": {
                        "unspecified": 0,
                        "no_reset": 0
                    }
                }
            }
        },
        "pci/0000:82:00.1": {
            "stats": {
                "reload": {
                    "driver_reinit": {
                        "unspecified": 0
                    },
                    "fw_activate": {
                        "unspecified": 0,
                        "no_reset": 0
                    }
                },
                "remote_reload": {
                    "driver_reinit": {
                        "unspecified": 1
                    },
                    "fw_activate": {
                        "unspecified": 1,
                        "no_reset": 0
                    }
                }
            }
        }
    }
}

Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: David Ahern <dsahern@gmail.com>

diff --git a/devlink/devlink.c b/devlink/devlink.c
index f16fc801f4015135a8146148950430e87c072932..27cb443116f35d22cd0cd4b7ac371ff3992ff5d6 100644 (file)
--- a/devlink/devlink.c
+++ b/devlink/devlink.c
@@ -682,6 +682,15 @@ static const enum mnl_attr_data_type devlink_policy[DEVLINK_ATTR_MAX + 1] = {
        [DEVLINK_ATTR_TRAP_METADATA] = MNL_TYPE_NESTED,
        [DEVLINK_ATTR_TRAP_GROUP_NAME] = MNL_TYPE_STRING,
        [DEVLINK_ATTR_RELOAD_FAILED] = MNL_TYPE_U8,
+       [DEVLINK_ATTR_DEV_STATS] = MNL_TYPE_NESTED,
+       [DEVLINK_ATTR_RELOAD_STATS] = MNL_TYPE_NESTED,
+       [DEVLINK_ATTR_RELOAD_STATS_ENTRY] = MNL_TYPE_NESTED,
+       [DEVLINK_ATTR_RELOAD_ACTION] = MNL_TYPE_U8,
+       [DEVLINK_ATTR_RELOAD_STATS_LIMIT] = MNL_TYPE_U8,
+       [DEVLINK_ATTR_RELOAD_STATS_VALUE] = MNL_TYPE_U32,
+       [DEVLINK_ATTR_REMOTE_RELOAD_STATS] = MNL_TYPE_NESTED,
+       [DEVLINK_ATTR_RELOAD_ACTION_INFO] = MNL_TYPE_NESTED,
+       [DEVLINK_ATTR_RELOAD_ACTION_STATS] = MNL_TYPE_NESTED,
        [DEVLINK_ATTR_TRAP_POLICER_ID] = MNL_TYPE_U32,
        [DEVLINK_ATTR_TRAP_POLICER_RATE] = MNL_TYPE_U64,
        [DEVLINK_ATTR_TRAP_POLICER_BURST] = MNL_TYPE_U64,
@@ -2371,6 +2380,18 @@ static const char *reload_action_name(uint8_t reload_action)
        }
 }
 
+static const char *reload_limit_name(uint8_t reload_limit)
+{
+       switch (reload_limit) {
+       case DEVLINK_RELOAD_LIMIT_UNSPEC:
+               return "unspecified";
+       case DEVLINK_RELOAD_LIMIT_NO_RESET:
+               return "no_reset";
+       default:
+               return "<unknown reload action>";
+       }
+}
+
 static const char *eswitch_mode_name(uint32_t mode)
 {
        switch (mode) {
@@ -2976,17 +2997,101 @@ static int cmd_dev_param(struct dl *dl)
        return -ENOENT;
 }
 
-static void pr_out_dev(struct dl *dl, struct nlattr **tb)
+static void pr_out_action_stats(struct dl *dl, struct nlattr *action_stats)
+{
+       struct nlattr *tb_stats_entry[DEVLINK_ATTR_MAX + 1] = {};
+       struct nlattr *nla_reload_stats_entry, *nla_limit, *nla_value;
+       enum devlink_reload_limit limit;
+       uint32_t value;
+       int err;
+
+       mnl_attr_for_each_nested(nla_reload_stats_entry, action_stats) {
+               err = mnl_attr_parse_nested(nla_reload_stats_entry, attr_cb,
+                                           tb_stats_entry);
+               if (err != MNL_CB_OK)
+                       return;
+
+               nla_limit = tb_stats_entry[DEVLINK_ATTR_RELOAD_STATS_LIMIT];
+               nla_value = tb_stats_entry[DEVLINK_ATTR_RELOAD_STATS_VALUE];
+               if (!nla_limit || !nla_value)
+                       return;
+
+               check_indent_newline(dl);
+               limit = mnl_attr_get_u8(nla_limit);
+               value = mnl_attr_get_u32(nla_value);
+               print_uint_name_value(reload_limit_name(limit), value);
+       }
+}
+
+static void pr_out_reload_stats(struct dl *dl, struct nlattr *reload_stats)
+{
+       struct nlattr *nla_action_info, *nla_action, *nla_action_stats;
+       struct nlattr *tb[DEVLINK_ATTR_MAX + 1] = {};
+       enum devlink_reload_action action;
+       int err;
+
+       mnl_attr_for_each_nested(nla_action_info, reload_stats) {
+               err = mnl_attr_parse_nested(nla_action_info, attr_cb, tb);
+               if (err != MNL_CB_OK)
+                       return;
+               nla_action = tb[DEVLINK_ATTR_RELOAD_ACTION];
+               nla_action_stats = tb[DEVLINK_ATTR_RELOAD_ACTION_STATS];
+               if (!nla_action || !nla_action_stats)
+                       return;
+
+               action = mnl_attr_get_u8(nla_action);
+               pr_out_object_start(dl, reload_action_name(action));
+               pr_out_action_stats(dl, nla_action_stats);
+               pr_out_object_end(dl);
+       }
+}
+
+static void pr_out_reload_data(struct dl *dl, struct nlattr **tb)
 {
+       struct nlattr *nla_reload_stats, *nla_remote_reload_stats;
+       struct nlattr *tb_stats[DEVLINK_ATTR_MAX + 1] = {};
        uint8_t reload_failed = 0;
+       int err;
 
        if (tb[DEVLINK_ATTR_RELOAD_FAILED])
                reload_failed = mnl_attr_get_u8(tb[DEVLINK_ATTR_RELOAD_FAILED]);
 
        if (reload_failed) {
-               __pr_out_handle_start(dl, tb, true, false);
                check_indent_newline(dl);
                print_bool(PRINT_ANY, "reload_failed", "reload_failed %s", true);
+       }
+       if (!tb[DEVLINK_ATTR_DEV_STATS] || !dl->stats)
+               return;
+       err = mnl_attr_parse_nested(tb[DEVLINK_ATTR_DEV_STATS], attr_cb,
+                                   tb_stats);
+       if (err != MNL_CB_OK)
+               return;
+
+       pr_out_object_start(dl, "stats");
+
+       nla_reload_stats = tb_stats[DEVLINK_ATTR_RELOAD_STATS];
+       if (nla_reload_stats) {
+               pr_out_object_start(dl, "reload");
+               pr_out_reload_stats(dl, nla_reload_stats);
+               pr_out_object_end(dl);
+       }
+       nla_remote_reload_stats = tb_stats[DEVLINK_ATTR_REMOTE_RELOAD_STATS];
+       if (nla_remote_reload_stats) {
+               pr_out_object_start(dl, "remote_reload");
+               pr_out_reload_stats(dl, nla_remote_reload_stats);
+               pr_out_object_end(dl);
+       }
+
+       pr_out_object_end(dl);
+}
+
+
+static void pr_out_dev(struct dl *dl, struct nlattr **tb)
+{
+       if ((tb[DEVLINK_ATTR_RELOAD_FAILED] && mnl_attr_get_u8(tb[DEVLINK_ATTR_RELOAD_FAILED])) ||
+           (tb[DEVLINK_ATTR_DEV_STATS] && dl->stats)) {
+               __pr_out_handle_start(dl, tb, true, false);
+               pr_out_reload_data(dl, tb);
                pr_out_handle_end(dl);
        } else {
                pr_out_handle(dl, tb);
@@ -4849,6 +4954,7 @@ static int cmd_mon_show_cb(const struct nlmsghdr *nlh, void *data)
                if (!tb[DEVLINK_ATTR_BUS_NAME] || !tb[DEVLINK_ATTR_DEV_NAME])
                        return MNL_CB_ERROR;
                pr_out_mon_header(genl->cmd);
+               dl->stats = true;
                pr_out_dev(dl, tb);
                pr_out_mon_footer();
                break;