Merge branch 'devlink-cleanups-and-move-devlink-health-functionality-to-separate-file'

Moshe Shemesh says:

====================
devlink: cleanups and move devlink health functionality to separate file

This patchset moves devlink health callbacks, helpers and related code
from leftover.c to new file health.c. About 1.3K LoC are moved by this
patchset, covering all devlink health functionality.

In addition this patchset includes a couple of small cleanups in devlink
health code and documentation update.
====================

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

Documentation/networking/devlink/devlink-health.rst

···
   * Recovery procedures
   * Diagnostics procedures
   * Object dump procedures
-  * OOB initial parameters
+  * Out Of Box initial parameters
 
 Different parts of the driver can register different types of health reporters
 with different handlers.
···
   * A log is being send to the kernel trace events buffer
   * Health status and statistics are being updated for the reporter instance
   * Object dump is being taken and saved at the reporter instance (as long as
-    there is no other dump which is already stored)
+    auto-dump is set and there is no other dump which is already stored)
   * Auto recovery attempt is being done. Depends on:
 
     - Auto-recovery configuration
     - Grace period vs. time passed since last recover
+
+Devlink formatted message
+=========================
+
+To handle devlink health diagnose and health dump requests, devlink creates a
+formatted message structure ``devlink_fmsg`` and send it to the driver's callback
+to fill the data in using the devlink fmsg API.
+
+Devlink fmsg is a mechanism to pass descriptors between drivers and devlink, in
+json-like format. The API allows the driver to add nested attributes such as
+object, object pair and value array, in addition to attributes such as name and
+value.
+
+Driver should use this API to fill the fmsg context in a format which will be
+translated by the devlink to the netlink message later. When it needs to send
+the data using SKBs to the netlink layer, it fragments the data between
+different SKBs. In order to do this fragmentation, it uses virtual nests
+attributes, to avoid actual nesting use which cannot be divided between
+different SKBs.
 
 User Interface
 ==============

include/trace/events/devlink.h

···
 		__string(bus_name, devlink_to_dev(devlink)->bus->name)
 		__string(dev_name, dev_name(devlink_to_dev(devlink)))
 		__string(driver_name, devlink_to_dev(devlink)->driver->name)
-		__string(reporter_name, msg)
+		__string(reporter_name, reporter_name)
 		__string(msg, msg)
 	),
 

net/devlink/Makefile

···
 # SPDX-License-Identifier: GPL-2.0
 
-obj-y := leftover.o core.o netlink.o dev.o
+obj-y := leftover.o core.o netlink.o dev.o health.o

net/devlink/devl_internal.h

···
 
 struct devlink_port *
 devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info);
+struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
+						 struct nlattr **attrs);
 
 /* Reload */
 bool devlink_reload_actions_valid(const struct devlink_ops *ops);
···
 int devlink_nl_cmd_flash_update(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_cmd_selftests_get_doit(struct sk_buff *skb, struct genl_info *info);
 int devlink_nl_cmd_selftests_run(struct sk_buff *skb, struct genl_info *info);
+int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
+					    struct genl_info *info);
+int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
+					    struct genl_info *info);
+int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
+						struct genl_info *info);
+int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
+						 struct genl_info *info);
+int devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
+						   struct netlink_callback *cb);
+int devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
+						   struct genl_info *info);
+int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
+					     struct genl_info *info);

net/devlink/health.c

···
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2016 Jiri Pirko <[e-mail]>
+ */
+
+#include <net/genetlink.h>
+#include <net/sock.h>
+#include <trace/events/devlink.h>
+#include "devl_internal.h"
+
+struct devlink_fmsg_item {
+	struct list_head list;
+	int attrtype;
+	u8 nla_type;
+	u16 len;
+	int value[];
+};
+
+struct devlink_fmsg {
+	struct list_head item_list;
+	bool putting_binary; /* This flag forces enclosing of binary data
+			      * in an array brackets. It forces using
+			      * of designated API:
+			      * devlink_fmsg_binary_pair_nest_start()
+			      * devlink_fmsg_binary_pair_nest_end()
+			      */
+};
+
+static struct devlink_fmsg *devlink_fmsg_alloc(void)
+{
+	struct devlink_fmsg *fmsg;
+
+	fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
+	if (!fmsg)
+		return NULL;
+
+	INIT_LIST_HEAD(&fmsg->item_list);
+
+	return fmsg;
+}
+
+static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
+{
+	struct devlink_fmsg_item *item, *tmp;
+
+	list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
+		list_del(&item->list);
+		kfree(item);
+	}
+	kfree(fmsg);
+}
+
+struct devlink_health_reporter {
+	struct list_head list;
+	void *priv;
+	const struct devlink_health_reporter_ops *ops;
+	struct devlink *devlink;
+	struct devlink_port *devlink_port;
+	struct devlink_fmsg *dump_fmsg;
+	struct mutex dump_lock; /* lock parallel read/write from dump buffers */
+	u64 graceful_period;
+	bool auto_recover;
+	bool auto_dump;
+	u8 health_state;
+	u64 dump_ts;
+	u64 dump_real_ts;
+	u64 error_count;
+	u64 recovery_count;
+	u64 last_recovery_ts;
+};
+
+void *
+devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
+{
+	return reporter->priv;
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
+
+static struct devlink_health_reporter *
+__devlink_health_reporter_find_by_name(struct list_head *reporter_list,
+				       const char *reporter_name)
+{
+	struct devlink_health_reporter *reporter;
+
+	list_for_each_entry(reporter, reporter_list, list)
+		if (!strcmp(reporter->ops->name, reporter_name))
+			return reporter;
+	return NULL;
+}
+
+static struct devlink_health_reporter *
+devlink_health_reporter_find_by_name(struct devlink *devlink,
+				     const char *reporter_name)
+{
+	return __devlink_health_reporter_find_by_name(&devlink->reporter_list,
+						      reporter_name);
+}
+
+static struct devlink_health_reporter *
+devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port,
+					  const char *reporter_name)
+{
+	return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list,
+						      reporter_name);
+}
+
+static struct devlink_health_reporter *
+__devlink_health_reporter_create(struct devlink *devlink,
+				 const struct devlink_health_reporter_ops *ops,
+				 u64 graceful_period, void *priv)
+{
+	struct devlink_health_reporter *reporter;
+
+	if (WARN_ON(graceful_period && !ops->recover))
+		return ERR_PTR(-EINVAL);
+
+	reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
+	if (!reporter)
+		return ERR_PTR(-ENOMEM);
+
+	reporter->priv = priv;
+	reporter->ops = ops;
+	reporter->devlink = devlink;
+	reporter->graceful_period = graceful_period;
+	reporter->auto_recover = !!ops->recover;
+	reporter->auto_dump = !!ops->dump;
+	mutex_init(&reporter->dump_lock);
+	return reporter;
+}
+
+/**
+ * devl_port_health_reporter_create() - create devlink health reporter for
+ *                                      specified port instance
+ *
+ * @port: devlink_port to which health reports will relate
+ * @ops: devlink health reporter ops
+ * @graceful_period: min time (in msec) between recovery attempts
+ * @priv: driver priv pointer
+ */
+struct devlink_health_reporter *
+devl_port_health_reporter_create(struct devlink_port *port,
+				 const struct devlink_health_reporter_ops *ops,
+				 u64 graceful_period, void *priv)
+{
+	struct devlink_health_reporter *reporter;
+
+	devl_assert_locked(port->devlink);
+
+	if (__devlink_health_reporter_find_by_name(&port->reporter_list,
+						   ops->name))
+		return ERR_PTR(-EEXIST);
+
+	reporter = __devlink_health_reporter_create(port->devlink, ops,
+						    graceful_period, priv);
+	if (IS_ERR(reporter))
+		return reporter;
+
+	reporter->devlink_port = port;
+	list_add_tail(&reporter->list, &port->reporter_list);
+	return reporter;
+}
+EXPORT_SYMBOL_GPL(devl_port_health_reporter_create);
+
+struct devlink_health_reporter *
+devlink_port_health_reporter_create(struct devlink_port *port,
+				    const struct devlink_health_reporter_ops *ops,
+				    u64 graceful_period, void *priv)
+{
+	struct devlink_health_reporter *reporter;
+	struct devlink *devlink = port->devlink;
+
+	devl_lock(devlink);
+	reporter = devl_port_health_reporter_create(port, ops,
+						    graceful_period, priv);
+	devl_unlock(devlink);
+	return reporter;
+}
+EXPORT_SYMBOL_GPL(devlink_port_health_reporter_create);
+
+/**
+ * devl_health_reporter_create - create devlink health reporter
+ *
+ * @devlink: devlink instance which the health reports will relate
+ * @ops: devlink health reporter ops
+ * @graceful_period: min time (in msec) between recovery attempts
+ * @priv: driver priv pointer
+ */
+struct devlink_health_reporter *
+devl_health_reporter_create(struct devlink *devlink,
+			    const struct devlink_health_reporter_ops *ops,
+			    u64 graceful_period, void *priv)
+{
+	struct devlink_health_reporter *reporter;
+
+	devl_assert_locked(devlink);
+
+	if (devlink_health_reporter_find_by_name(devlink, ops->name))
+		return ERR_PTR(-EEXIST);
+
+	reporter = __devlink_health_reporter_create(devlink, ops,
+						    graceful_period, priv);
+	if (IS_ERR(reporter))
+		return reporter;
+
+	list_add_tail(&reporter->list, &devlink->reporter_list);
+	return reporter;
+}
+EXPORT_SYMBOL_GPL(devl_health_reporter_create);
+
+struct devlink_health_reporter *
+devlink_health_reporter_create(struct devlink *devlink,
+			       const struct devlink_health_reporter_ops *ops,
+			       u64 graceful_period, void *priv)
+{
+	struct devlink_health_reporter *reporter;
+
+	devl_lock(devlink);
+	reporter = devl_health_reporter_create(devlink, ops,
+					       graceful_period, priv);
+	devl_unlock(devlink);
+	return reporter;
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
+
+static void
+devlink_health_reporter_free(struct devlink_health_reporter *reporter)
+{
+	mutex_destroy(&reporter->dump_lock);
+	if (reporter->dump_fmsg)
+		devlink_fmsg_free(reporter->dump_fmsg);
+	kfree(reporter);
+}
+
+/**
+ * devl_health_reporter_destroy() - destroy devlink health reporter
+ *
+ * @reporter: devlink health reporter to destroy
+ */
+void
+devl_health_reporter_destroy(struct devlink_health_reporter *reporter)
+{
+	devl_assert_locked(reporter->devlink);
+
+	list_del(&reporter->list);
+	devlink_health_reporter_free(reporter);
+}
+EXPORT_SYMBOL_GPL(devl_health_reporter_destroy);
+
+void
+devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
+{
+	struct devlink *devlink = reporter->devlink;
+
+	devl_lock(devlink);
+	devl_health_reporter_destroy(reporter);
+	devl_unlock(devlink);
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
+
+static int
+devlink_nl_health_reporter_fill(struct sk_buff *msg,
+				struct devlink_health_reporter *reporter,
+				enum devlink_command cmd, u32 portid,
+				u32 seq, int flags)
+{
+	struct devlink *devlink = reporter->devlink;
+	struct nlattr *reporter_attr;
+	void *hdr;
+
+	hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
+	if (!hdr)
+		return -EMSGSIZE;
+
+	if (devlink_nl_put_handle(msg, devlink))
+		goto genlmsg_cancel;
+
+	if (reporter->devlink_port) {
+		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index))
+			goto genlmsg_cancel;
+	}
+	reporter_attr = nla_nest_start_noflag(msg,
+					      DEVLINK_ATTR_HEALTH_REPORTER);
+	if (!reporter_attr)
+		goto genlmsg_cancel;
+	if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
+			   reporter->ops->name))
+		goto reporter_nest_cancel;
+	if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
+		       reporter->health_state))
+		goto reporter_nest_cancel;
+	if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
+			      reporter->error_count, DEVLINK_ATTR_PAD))
+		goto reporter_nest_cancel;
+	if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
+			      reporter->recovery_count, DEVLINK_ATTR_PAD))
+		goto reporter_nest_cancel;
+	if (reporter->ops->recover &&
+	    nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
+			      reporter->graceful_period,
+			      DEVLINK_ATTR_PAD))
+		goto reporter_nest_cancel;
+	if (reporter->ops->recover &&
+	    nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
+		       reporter->auto_recover))
+		goto reporter_nest_cancel;
+	if (reporter->dump_fmsg &&
+	    nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
+			      jiffies_to_msecs(reporter->dump_ts),
+			      DEVLINK_ATTR_PAD))
+		goto reporter_nest_cancel;
+	if (reporter->dump_fmsg &&
+	    nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
+			      reporter->dump_real_ts, DEVLINK_ATTR_PAD))
+		goto reporter_nest_cancel;
+	if (reporter->ops->dump &&
+	    nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
+		       reporter->auto_dump))
+		goto reporter_nest_cancel;
+
+	nla_nest_end(msg, reporter_attr);
+	genlmsg_end(msg, hdr);
+	return 0;
+
+reporter_nest_cancel:
+	nla_nest_cancel(msg, reporter_attr);
+genlmsg_cancel:
+	genlmsg_cancel(msg, hdr);
+	return -EMSGSIZE;
+}
+
+static struct devlink_health_reporter *
+devlink_health_reporter_get_from_attrs(struct devlink *devlink,
+				       struct nlattr **attrs)
+{
+	struct devlink_port *devlink_port;
+	char *reporter_name;
+
+	if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
+		return NULL;
+
+	reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
+	devlink_port = devlink_port_get_from_attrs(devlink, attrs);
+	if (IS_ERR(devlink_port))
+		return devlink_health_reporter_find_by_name(devlink,
+							    reporter_name);
+	else
+		return devlink_port_health_reporter_find_by_name(devlink_port,
+								 reporter_name);
+}
+
+static struct devlink_health_reporter *
+devlink_health_reporter_get_from_info(struct devlink *devlink,
+				      struct genl_info *info)
+{
+	return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
+}
+
+int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
+					    struct genl_info *info)
+{
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_health_reporter *reporter;
+	struct sk_buff *msg;
+	int err;
+
+	reporter = devlink_health_reporter_get_from_info(devlink, info);
+	if (!reporter)
+		return -EINVAL;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return -ENOMEM;
+
+	err = devlink_nl_health_reporter_fill(msg, reporter,
+					      DEVLINK_CMD_HEALTH_REPORTER_GET,
+					      info->snd_portid, info->snd_seq,
+					      0);
+	if (err) {
+		nlmsg_free(msg);
+		return err;
+	}
+
+	return genlmsg_reply(msg, info);
+}
+
+static int
+devlink_nl_cmd_health_reporter_get_dump_one(struct sk_buff *msg,
+					    struct devlink *devlink,
+					    struct netlink_callback *cb)
+{
+	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+	struct devlink_health_reporter *reporter;
+	struct devlink_port *port;
+	unsigned long port_index;
+	int idx = 0;
+	int err;
+
+	list_for_each_entry(reporter, &devlink->reporter_list, list) {
+		if (idx < state->idx) {
+			idx++;
+			continue;
+		}
+		err = devlink_nl_health_reporter_fill(msg, reporter,
+						      DEVLINK_CMD_HEALTH_REPORTER_GET,
+						      NETLINK_CB(cb->skb).portid,
+						      cb->nlh->nlmsg_seq,
+						      NLM_F_MULTI);
+		if (err) {
+			state->idx = idx;
+			return err;
+		}
+		idx++;
+	}
+	xa_for_each(&devlink->ports, port_index, port) {
+		list_for_each_entry(reporter, &port->reporter_list, list) {
+			if (idx < state->idx) {
+				idx++;
+				continue;
+			}
+			err = devlink_nl_health_reporter_fill(msg, reporter,
+							      DEVLINK_CMD_HEALTH_REPORTER_GET,
+							      NETLINK_CB(cb->skb).portid,
+							      cb->nlh->nlmsg_seq,
+							      NLM_F_MULTI);
+			if (err) {
+				state->idx = idx;
+				return err;
+			}
+			idx++;
+		}
+	}
+
+	return 0;
+}
+
+const struct devlink_cmd devl_cmd_health_reporter_get = {
+	.dump_one		= devlink_nl_cmd_health_reporter_get_dump_one,
+};
+
+int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
+					    struct genl_info *info)
+{
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_health_reporter *reporter;
+
+	reporter = devlink_health_reporter_get_from_info(devlink, info);
+	if (!reporter)
+		return -EINVAL;
+
+	if (!reporter->ops->recover &&
+	    (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
+	     info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]))
+		return -EOPNOTSUPP;
+
+	if (!reporter->ops->dump &&
+	    info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
+		return -EOPNOTSUPP;
+
+	if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
+		reporter->graceful_period =
+			nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
+
+	if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
+		reporter->auto_recover =
+			nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
+
+	if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
+		reporter->auto_dump =
+		nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
+
+	return 0;
+}
+
+static void devlink_recover_notify(struct devlink_health_reporter *reporter,
+				   enum devlink_command cmd)
+{
+	struct devlink *devlink = reporter->devlink;
+	struct sk_buff *msg;
+	int err;
+
+	WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+	WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg)
+		return;
+
+	err = devlink_nl_health_reporter_fill(msg, reporter, cmd, 0, 0, 0);
+	if (err) {
+		nlmsg_free(msg);
+		return;
+	}
+
+	genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
+				0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
+}
+
+void
+devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
+{
+	reporter->recovery_count++;
+	reporter->last_recovery_ts = jiffies;
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
+
+static int
+devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
+				void *priv_ctx, struct netlink_ext_ack *extack)
+{
+	int err;
+
+	if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
+		return 0;
+
+	if (!reporter->ops->recover)
+		return -EOPNOTSUPP;
+
+	err = reporter->ops->recover(reporter, priv_ctx, extack);
+	if (err)
+		return err;
+
+	devlink_health_reporter_recovery_done(reporter);
+	reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
+	devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+
+	return 0;
+}
+
+static void
+devlink_health_dump_clear(struct devlink_health_reporter *reporter)
+{
+	if (!reporter->dump_fmsg)
+		return;
+	devlink_fmsg_free(reporter->dump_fmsg);
+	reporter->dump_fmsg = NULL;
+}
+
+static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
+				  void *priv_ctx,
+				  struct netlink_ext_ack *extack)
+{
+	int err;
+
+	if (!reporter->ops->dump)
+		return 0;
+
+	if (reporter->dump_fmsg)
+		return 0;
+
+	reporter->dump_fmsg = devlink_fmsg_alloc();
+	if (!reporter->dump_fmsg) {
+		err = -ENOMEM;
+		return err;
+	}
+
+	err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
+	if (err)
+		goto dump_err;
+
+	err = reporter->ops->dump(reporter, reporter->dump_fmsg,
+				  priv_ctx, extack);
+	if (err)
+		goto dump_err;
+
+	err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
+	if (err)
+		goto dump_err;
+
+	reporter->dump_ts = jiffies;
+	reporter->dump_real_ts = ktime_get_real_ns();
+
+	return 0;
+
+dump_err:
+	devlink_health_dump_clear(reporter);
+	return err;
+}
+
+int devlink_health_report(struct devlink_health_reporter *reporter,
+			  const char *msg, void *priv_ctx)
+{
+	enum devlink_health_reporter_state prev_health_state;
+	struct devlink *devlink = reporter->devlink;
+	unsigned long recover_ts_threshold;
+	int ret;
+
+	/* write a log message of the current error */
+	WARN_ON(!msg);
+	trace_devlink_health_report(devlink, reporter->ops->name, msg);
+	reporter->error_count++;
+	prev_health_state = reporter->health_state;
+	reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
+	devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+
+	/* abort if the previous error wasn't recovered */
+	recover_ts_threshold = reporter->last_recovery_ts +
+			       msecs_to_jiffies(reporter->graceful_period);
+	if (reporter->auto_recover &&
+	    (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
+	     (reporter->last_recovery_ts && reporter->recovery_count &&
+	      time_is_after_jiffies(recover_ts_threshold)))) {
+		trace_devlink_health_recover_aborted(devlink,
+						     reporter->ops->name,
+						     reporter->health_state,
+						     jiffies -
+						     reporter->last_recovery_ts);
+		return -ECANCELED;
+	}
+
+	if (reporter->auto_dump) {
+		mutex_lock(&reporter->dump_lock);
+		/* store current dump of current error, for later analysis */
+		devlink_health_do_dump(reporter, priv_ctx, NULL);
+		mutex_unlock(&reporter->dump_lock);
+	}
+
+	if (!reporter->auto_recover)
+		return 0;
+
+	devl_lock(devlink);
+	ret = devlink_health_reporter_recover(reporter, priv_ctx, NULL);
+	devl_unlock(devlink);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(devlink_health_report);
+
+void
+devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
+				     enum devlink_health_reporter_state state)
+{
+	if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
+		    state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
+		return;
+
+	if (reporter->health_state == state)
+		return;
+
+	reporter->health_state = state;
+	trace_devlink_health_reporter_state_update(reporter->devlink,
+						   reporter->ops->name, state);
+	devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
+}
+EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
+
+int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
+						struct genl_info *info)
+{
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_health_reporter *reporter;
+
+	reporter = devlink_health_reporter_get_from_info(devlink, info);
+	if (!reporter)
+		return -EINVAL;
+
+	return devlink_health_reporter_recover(reporter, NULL, info->extack);
+}
+
+static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
+				    int attrtype)
+{
+	struct devlink_fmsg_item *item;
+
+	item = kzalloc(sizeof(*item), GFP_KERNEL);
+	if (!item)
+		return -ENOMEM;
+
+	item->attrtype = attrtype;
+	list_add_tail(&item->list, &fmsg->item_list);
+
+	return 0;
+}
+
+int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
+
+static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
+}
+
+int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_nest_end(fmsg);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
+
+#define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
+
+static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
+{
+	struct devlink_fmsg_item *item;
+
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
+		return -EMSGSIZE;
+
+	item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
+	if (!item)
+		return -ENOMEM;
+
+	item->nla_type = NLA_NUL_STRING;
+	item->len = strlen(name) + 1;
+	item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
+	memcpy(&item->value, name, item->len);
+	list_add_tail(&item->list, &fmsg->item_list);
+
+	return 0;
+}
+
+int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
+{
+	int err;
+
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_put_name(fmsg, name);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
+
+int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_nest_end(fmsg);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
+
+int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
+				     const char *name)
+{
+	int err;
+
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	err = devlink_fmsg_pair_nest_start(fmsg, name);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
+
+int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
+{
+	int err;
+
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	err = devlink_fmsg_nest_end(fmsg);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_nest_end(fmsg);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
+
+int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
+					const char *name)
+{
+	int err;
+
+	err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
+	if (err)
+		return err;
+
+	fmsg->putting_binary = true;
+	return err;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
+
+int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
+{
+	if (!fmsg->putting_binary)
+		return -EINVAL;
+
+	fmsg->putting_binary = false;
+	return devlink_fmsg_arr_pair_nest_end(fmsg);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
+
+static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
+				  const void *value, u16 value_len,
+				  u8 value_nla_type)
+{
+	struct devlink_fmsg_item *item;
+
+	if (value_len > DEVLINK_FMSG_MAX_SIZE)
+		return -EMSGSIZE;
+
+	item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
+	if (!item)
+		return -ENOMEM;
+
+	item->nla_type = value_nla_type;
+	item->len = value_len;
+	item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
+	memcpy(&item->value, value, item->len);
+	list_add_tail(&item->list, &fmsg->item_list);
+
+	return 0;
+}
+
+static int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
+}
+
+static int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
+}
+
+int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
+
+static int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
+}
+
+int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
+{
+	if (fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
+				      NLA_NUL_STRING);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
+
+int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
+			    u16 value_len)
+{
+	if (!fmsg->putting_binary)
+		return -EINVAL;
+
+	return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
+
+int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
+			       bool value)
+{
+	int err;
+
+	err = devlink_fmsg_pair_nest_start(fmsg, name);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_bool_put(fmsg, value);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_pair_nest_end(fmsg);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
+
+int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
+			     u8 value)
+{
+	int err;
+
+	err = devlink_fmsg_pair_nest_start(fmsg, name);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u8_put(fmsg, value);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_pair_nest_end(fmsg);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
+
+int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
+			      u32 value)
+{
+	int err;
+
+	err = devlink_fmsg_pair_nest_start(fmsg, name);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u32_put(fmsg, value);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_pair_nest_end(fmsg);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
+
+int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
+			      u64 value)
+{
+	int err;
+
+	err = devlink_fmsg_pair_nest_start(fmsg, name);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_u64_put(fmsg, value);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_pair_nest_end(fmsg);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
+
+int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
+				 const char *value)
+{
+	int err;
+
+	err = devlink_fmsg_pair_nest_start(fmsg, name);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_string_put(fmsg, value);
+	if (err)
+		return err;
+
+	err = devlink_fmsg_pair_nest_end(fmsg);
+	if (err)
+		return err;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
+
+int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
+				 const void *value, u32 value_len)
+{
+	u32 data_size;
+	int end_err;
+	u32 offset;
+	int err;
+
+	err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
+	if (err)
+		return err;
+
+	for (offset = 0; offset < value_len; offset += data_size) {
+		data_size = value_len - offset;
+		if (data_size > DEVLINK_FMSG_MAX_SIZE)
+			data_size = DEVLINK_FMSG_MAX_SIZE;
+		err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
+		if (err)
+			break;
+		/* Exit from loop with a break (instead of
+		 * return) to make sure putting_binary is turned off in
+		 * devlink_fmsg_binary_pair_nest_end
+		 */
+	}
+
+	end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
+	if (end_err)
+		err = end_err;
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
+
+static int
+devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
+{
+	switch (msg->nla_type) {
+	case NLA_FLAG:
+	case NLA_U8:
+	case NLA_U32:
+	case NLA_U64:
+	case NLA_NUL_STRING:
+	case NLA_BINARY:
+		return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
+				  msg->nla_type);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int
+devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
+{
+	int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
+	u8 tmp;
+
+	switch (msg->nla_type) {
+	case NLA_FLAG:
+		/* Always provide flag data, regardless of its value */
+		tmp = *(bool *)msg->value;
+
+		return nla_put_u8(skb, attrtype, tmp);
+	case NLA_U8:
+		return nla_put_u8(skb, attrtype, *(u8 *)msg->value);
+	case NLA_U32:
+		return nla_put_u32(skb, attrtype, *(u32 *)msg->value);
+	case NLA_U64:
+		return nla_put_u64_64bit(skb, attrtype, *(u64 *)msg->value,
+					 DEVLINK_ATTR_PAD);
+	case NLA_NUL_STRING:
+		return nla_put_string(skb, attrtype, (char *)&msg->value);
+	case NLA_BINARY:
+		return nla_put(skb, attrtype, msg->len, (void *)&msg->value);
+	default:
+		return -EINVAL;
+	}
+}
+
+static int
+devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
+			 int *start)
+{
+	struct devlink_fmsg_item *item;
+	struct nlattr *fmsg_nlattr;
+	int err = 0;
+	int i = 0;
+
+	fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
+	if (!fmsg_nlattr)
+		return -EMSGSIZE;
+
+	list_for_each_entry(item, &fmsg->item_list, list) {
+		if (i < *start) {
+			i++;
+			continue;
+		}
+
+		switch (item->attrtype) {
+		case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
+		case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
+		case DEVLINK_ATTR_FMSG_ARR_NEST_START:
+		case DEVLINK_ATTR_FMSG_NEST_END:
+			err = nla_put_flag(skb, item->attrtype);
+			break;
+		case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
+			err = devlink_fmsg_item_fill_type(item, skb);
+			if (err)
+				break;
+			err = devlink_fmsg_item_fill_data(item, skb);
+			break;
+		case DEVLINK_ATTR_FMSG_OBJ_NAME:
+			err = nla_put_string(skb, item->attrtype,
+					     (char *)&item->value);
+			break;
+		default:
+			err = -EINVAL;
+			break;
+		}
+		if (!err)
+			*start = ++i;
+		else
+			break;
+	}
+
+	nla_nest_end(skb, fmsg_nlattr);
+	return err;
+}
+
+static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
+			    struct genl_info *info,
+			    enum devlink_command cmd, int flags)
+{
+	struct nlmsghdr *nlh;
+	struct sk_buff *skb;
+	bool last = false;
+	int index = 0;
+	void *hdr;
+	int err;
+
+	while (!last) {
+		int tmp_index = index;
+
+		skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+		if (!skb)
+			return -ENOMEM;
+
+		hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
+				  &devlink_nl_family, flags | NLM_F_MULTI, cmd);
+		if (!hdr) {
+			err = -EMSGSIZE;
+			goto nla_put_failure;
+		}
+
+		err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
+		if (!err)
+			last = true;
+		else if (err != -EMSGSIZE || tmp_index == index)
+			goto nla_put_failure;
+
+		genlmsg_end(skb, hdr);
+		err = genlmsg_reply(skb, info);
+		if (err)
+			return err;
+	}
+
+	skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!skb)
+		return -ENOMEM;
+	nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
+			NLMSG_DONE, 0, flags | NLM_F_MULTI);
+	if (!nlh) {
+		err = -EMSGSIZE;
+		goto nla_put_failure;
+	}
+
+	return genlmsg_reply(skb, info);
+
+nla_put_failure:
+	nlmsg_free(skb);
+	return err;
+}
+
+static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
+			       struct netlink_callback *cb,
+			       enum devlink_command cmd)
+{
+	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+	int index = state->idx;
+	int tmp_index = index;
+	void *hdr;
+	int err;
+
+	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+			  &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
+	if (!hdr) {
+		err = -EMSGSIZE;
+		goto nla_put_failure;
+	}
+
+	err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
+	if ((err && err != -EMSGSIZE) || tmp_index == index)
+		goto nla_put_failure;
+
+	state->idx = index;
+	genlmsg_end(skb, hdr);
+	return skb->len;
+
+nla_put_failure:
+	genlmsg_cancel(skb, hdr);
+	return err;
+}
+
+int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
+						 struct genl_info *info)
+{
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_health_reporter *reporter;
+	struct devlink_fmsg *fmsg;
+	int err;
+
+	reporter = devlink_health_reporter_get_from_info(devlink, info);
+	if (!reporter)
+		return -EINVAL;
+
+	if (!reporter->ops->diagnose)
+		return -EOPNOTSUPP;
+
+	fmsg = devlink_fmsg_alloc();
+	if (!fmsg)
+		return -ENOMEM;
+
+	err = devlink_fmsg_obj_nest_start(fmsg);
+	if (err)
+		goto out;
+
+	err = reporter->ops->diagnose(reporter, fmsg, info->extack);
+	if (err)
+		goto out;
+
+	err = devlink_fmsg_obj_nest_end(fmsg);
+	if (err)
+		goto out;
+
+	err = devlink_fmsg_snd(fmsg, info,
+			       DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
+
+out:
+	devlink_fmsg_free(fmsg);
+	return err;
+}
+
+static struct devlink_health_reporter *
+devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
+{
+	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
+	struct devlink_health_reporter *reporter;
+	struct nlattr **attrs = info->attrs;
+	struct devlink *devlink;
+
+	devlink = devlink_get_from_attrs_lock(sock_net(cb->skb->sk), attrs);
+	if (IS_ERR(devlink))
+		return NULL;
+	devl_unlock(devlink);
+
+	reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
+	devlink_put(devlink);
+	return reporter;
+}
+
+int devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
+						   struct netlink_callback *cb)
+{
+	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
+	struct devlink_health_reporter *reporter;
+	int err;
+
+	reporter = devlink_health_reporter_get_from_cb(cb);
+	if (!reporter)
+		return -EINVAL;
+
+	if (!reporter->ops->dump)
+		return -EOPNOTSUPP;
+
+	mutex_lock(&reporter->dump_lock);
+	if (!state->idx) {
+		err = devlink_health_do_dump(reporter, NULL, cb->extack);
+		if (err)
+			goto unlock;
+		state->dump_ts = reporter->dump_ts;
+	}
+	if (!reporter->dump_fmsg || state->dump_ts != reporter->dump_ts) {
+		NL_SET_ERR_MSG(cb->extack, "Dump trampled, please retry");
+		err = -EAGAIN;
+		goto unlock;
+	}
+
+	err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
+				  DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
+unlock:
+	mutex_unlock(&reporter->dump_lock);
+	return err;
+}
+
+int devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
+						   struct genl_info *info)
+{
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_health_reporter *reporter;
+
+	reporter = devlink_health_reporter_get_from_info(devlink, info);
+	if (!reporter)
+		return -EINVAL;
+
+	if (!reporter->ops->dump)
+		return -EOPNOTSUPP;
+
+	mutex_lock(&reporter->dump_lock);
+	devlink_health_dump_clear(reporter);
+	mutex_unlock(&reporter->dump_lock);
+	return 0;
+}
+
+int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
+					     struct genl_info *info)
+{
+	struct devlink *devlink = info->user_ptr[0];
+	struct devlink_health_reporter *reporter;
+
+	reporter = devlink_health_reporter_get_from_info(devlink, info);
+	if (!reporter)
+		return -EINVAL;
+
+	if (!reporter->ops->test)
+		return -EOPNOTSUPP;
+
+	return reporter->ops->test(reporter, info->extack);
+}

net/devlink/leftover.c

···
 	return xa_load(&devlink->ports, port_index);
 }
 
-static struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
-							struct nlattr **attrs)
+struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink,
+						 struct nlattr **attrs)
 {
 	if (attrs[DEVLINK_ATTR_PORT_INDEX]) {
 		u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]);
···
 	devl_unlock(devlink);
 	devlink_put(devlink);
 	return err;
-}
-
-struct devlink_fmsg_item {
-	struct list_head list;
-	int attrtype;
-	u8 nla_type;
-	u16 len;
-	int value[];
-};
-
-struct devlink_fmsg {
-	struct list_head item_list;
-	bool putting_binary; /* This flag forces enclosing of binary data
-			      * in an array brackets. It forces using
-			      * of designated API:
-			      * devlink_fmsg_binary_pair_nest_start()
-			      * devlink_fmsg_binary_pair_nest_end()
-			      */
-};
-
-static struct devlink_fmsg *devlink_fmsg_alloc(void)
-{
-	struct devlink_fmsg *fmsg;
-
-	fmsg = kzalloc(sizeof(*fmsg), GFP_KERNEL);
-	if (!fmsg)
-		return NULL;
-
-	INIT_LIST_HEAD(&fmsg->item_list);
-
-	return fmsg;
-}
-
-static void devlink_fmsg_free(struct devlink_fmsg *fmsg)
-{
-	struct devlink_fmsg_item *item, *tmp;
-
-	list_for_each_entry_safe(item, tmp, &fmsg->item_list, list) {
-		list_del(&item->list);
-		kfree(item);
-	}
-	kfree(fmsg);
-}
-
-static int devlink_fmsg_nest_common(struct devlink_fmsg *fmsg,
-				    int attrtype)
-{
-	struct devlink_fmsg_item *item;
-
-	item = kzalloc(sizeof(*item), GFP_KERNEL);
-	if (!item)
-		return -ENOMEM;
-
-	item->attrtype = attrtype;
-	list_add_tail(&item->list, &fmsg->item_list);
-
-	return 0;
-}
-
-int devlink_fmsg_obj_nest_start(struct devlink_fmsg *fmsg)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_OBJ_NEST_START);
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_start);
-
-static int devlink_fmsg_nest_end(struct devlink_fmsg *fmsg)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_NEST_END);
-}
-
-int devlink_fmsg_obj_nest_end(struct devlink_fmsg *fmsg)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_nest_end(fmsg);
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_obj_nest_end);
-
-#define DEVLINK_FMSG_MAX_SIZE (GENLMSG_DEFAULT_SIZE - GENL_HDRLEN - NLA_HDRLEN)
-
-static int devlink_fmsg_put_name(struct devlink_fmsg *fmsg, const char *name)
-{
-	struct devlink_fmsg_item *item;
-
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	if (strlen(name) + 1 > DEVLINK_FMSG_MAX_SIZE)
-		return -EMSGSIZE;
-
-	item = kzalloc(sizeof(*item) + strlen(name) + 1, GFP_KERNEL);
-	if (!item)
-		return -ENOMEM;
-
-	item->nla_type = NLA_NUL_STRING;
-	item->len = strlen(name) + 1;
-	item->attrtype = DEVLINK_ATTR_FMSG_OBJ_NAME;
-	memcpy(&item->value, name, item->len);
-	list_add_tail(&item->list, &fmsg->item_list);
-
-	return 0;
-}
-
-int devlink_fmsg_pair_nest_start(struct devlink_fmsg *fmsg, const char *name)
-{
-	int err;
-
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_PAIR_NEST_START);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_put_name(fmsg, name);
-	if (err)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_start);
-
-int devlink_fmsg_pair_nest_end(struct devlink_fmsg *fmsg)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_nest_end(fmsg);
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_pair_nest_end);
-
-int devlink_fmsg_arr_pair_nest_start(struct devlink_fmsg *fmsg,
-				     const char *name)
-{
-	int err;
-
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	err = devlink_fmsg_pair_nest_start(fmsg, name);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_nest_common(fmsg, DEVLINK_ATTR_FMSG_ARR_NEST_START);
-	if (err)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_start);
-
-int devlink_fmsg_arr_pair_nest_end(struct devlink_fmsg *fmsg)
-{
-	int err;
-
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	err = devlink_fmsg_nest_end(fmsg);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_nest_end(fmsg);
-	if (err)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_arr_pair_nest_end);
-
-int devlink_fmsg_binary_pair_nest_start(struct devlink_fmsg *fmsg,
-					const char *name)
-{
-	int err;
-
-	err = devlink_fmsg_arr_pair_nest_start(fmsg, name);
-	if (err)
-		return err;
-
-	fmsg->putting_binary = true;
-	return err;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_start);
-
-int devlink_fmsg_binary_pair_nest_end(struct devlink_fmsg *fmsg)
-{
-	if (!fmsg->putting_binary)
-		return -EINVAL;
-
-	fmsg->putting_binary = false;
-	return devlink_fmsg_arr_pair_nest_end(fmsg);
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_nest_end);
-
-static int devlink_fmsg_put_value(struct devlink_fmsg *fmsg,
-				  const void *value, u16 value_len,
-				  u8 value_nla_type)
-{
-	struct devlink_fmsg_item *item;
-
-	if (value_len > DEVLINK_FMSG_MAX_SIZE)
-		return -EMSGSIZE;
-
-	item = kzalloc(sizeof(*item) + value_len, GFP_KERNEL);
-	if (!item)
-		return -ENOMEM;
-
-	item->nla_type = value_nla_type;
-	item->len = value_len;
-	item->attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
-	memcpy(&item->value, value, item->len);
-	list_add_tail(&item->list, &fmsg->item_list);
-
-	return 0;
-}
-
-static int devlink_fmsg_bool_put(struct devlink_fmsg *fmsg, bool value)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_FLAG);
-}
-
-static int devlink_fmsg_u8_put(struct devlink_fmsg *fmsg, u8 value)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U8);
-}
-
-int devlink_fmsg_u32_put(struct devlink_fmsg *fmsg, u32 value)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U32);
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_u32_put);
-
-static int devlink_fmsg_u64_put(struct devlink_fmsg *fmsg, u64 value)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_put_value(fmsg, &value, sizeof(value), NLA_U64);
-}
-
-int devlink_fmsg_string_put(struct devlink_fmsg *fmsg, const char *value)
-{
-	if (fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_put_value(fmsg, value, strlen(value) + 1,
-				      NLA_NUL_STRING);
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_string_put);
-
-int devlink_fmsg_binary_put(struct devlink_fmsg *fmsg, const void *value,
-			    u16 value_len)
-{
-	if (!fmsg->putting_binary)
-		return -EINVAL;
-
-	return devlink_fmsg_put_value(fmsg, value, value_len, NLA_BINARY);
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_binary_put);
-
-int devlink_fmsg_bool_pair_put(struct devlink_fmsg *fmsg, const char *name,
-			       bool value)
-{
-	int err;
-
-	err = devlink_fmsg_pair_nest_start(fmsg, name);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_bool_put(fmsg, value);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_pair_nest_end(fmsg);
-	if (err)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_bool_pair_put);
-
-int devlink_fmsg_u8_pair_put(struct devlink_fmsg *fmsg, const char *name,
-			     u8 value)
-{
-	int err;
-
-	err = devlink_fmsg_pair_nest_start(fmsg, name);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_u8_put(fmsg, value);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_pair_nest_end(fmsg);
-	if (err)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_u8_pair_put);
-
-int devlink_fmsg_u32_pair_put(struct devlink_fmsg *fmsg, const char *name,
-			      u32 value)
-{
-	int err;
-
-	err = devlink_fmsg_pair_nest_start(fmsg, name);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_u32_put(fmsg, value);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_pair_nest_end(fmsg);
-	if (err)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_u32_pair_put);
-
-int devlink_fmsg_u64_pair_put(struct devlink_fmsg *fmsg, const char *name,
-			      u64 value)
-{
-	int err;
-
-	err = devlink_fmsg_pair_nest_start(fmsg, name);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_u64_put(fmsg, value);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_pair_nest_end(fmsg);
-	if (err)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_u64_pair_put);
-
-int devlink_fmsg_string_pair_put(struct devlink_fmsg *fmsg, const char *name,
-				 const char *value)
-{
-	int err;
-
-	err = devlink_fmsg_pair_nest_start(fmsg, name);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_string_put(fmsg, value);
-	if (err)
-		return err;
-
-	err = devlink_fmsg_pair_nest_end(fmsg);
-	if (err)
-		return err;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_string_pair_put);
-
-int devlink_fmsg_binary_pair_put(struct devlink_fmsg *fmsg, const char *name,
-				 const void *value, u32 value_len)
-{
-	u32 data_size;
-	int end_err;
-	u32 offset;
-	int err;
-
-	err = devlink_fmsg_binary_pair_nest_start(fmsg, name);
-	if (err)
-		return err;
-
-	for (offset = 0; offset < value_len; offset += data_size) {
-		data_size = value_len - offset;
-		if (data_size > DEVLINK_FMSG_MAX_SIZE)
-			data_size = DEVLINK_FMSG_MAX_SIZE;
-		err = devlink_fmsg_binary_put(fmsg, value + offset, data_size);
-		if (err)
-			break;
-		/* Exit from loop with a break (instead of
-		 * return) to make sure putting_binary is turned off in
-		 * devlink_fmsg_binary_pair_nest_end
-		 */
-	}
-
-	end_err = devlink_fmsg_binary_pair_nest_end(fmsg);
-	if (end_err)
-		err = end_err;
-
-	return err;
-}
-EXPORT_SYMBOL_GPL(devlink_fmsg_binary_pair_put);
-
-static int
-devlink_fmsg_item_fill_type(struct devlink_fmsg_item *msg, struct sk_buff *skb)
-{
-	switch (msg->nla_type) {
-	case NLA_FLAG:
-	case NLA_U8:
-	case NLA_U32:
-	case NLA_U64:
-	case NLA_NUL_STRING:
-	case NLA_BINARY:
-		return nla_put_u8(skb, DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE,
-				  msg->nla_type);
-	default:
-		return -EINVAL;
-	}
-}
-
-static int
-devlink_fmsg_item_fill_data(struct devlink_fmsg_item *msg, struct sk_buff *skb)
-{
-	int attrtype = DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA;
-	u8 tmp;
-
-	switch (msg->nla_type) {
-	case NLA_FLAG:
-		/* Always provide flag data, regardless of its value */
-		tmp = *(bool *) msg->value;
-
-		return nla_put_u8(skb, attrtype, tmp);
-	case NLA_U8:
-		return nla_put_u8(skb, attrtype, *(u8 *) msg->value);
-	case NLA_U32:
-		return nla_put_u32(skb, attrtype, *(u32 *) msg->value);
-	case NLA_U64:
-		return nla_put_u64_64bit(skb, attrtype, *(u64 *) msg->value,
-					 DEVLINK_ATTR_PAD);
-	case NLA_NUL_STRING:
-		return nla_put_string(skb, attrtype, (char *) &msg->value);
-	case NLA_BINARY:
-		return nla_put(skb, attrtype, msg->len, (void *) &msg->value);
-	default:
-		return -EINVAL;
-	}
-}
-
-static int
-devlink_fmsg_prepare_skb(struct devlink_fmsg *fmsg, struct sk_buff *skb,
-			 int *start)
-{
-	struct devlink_fmsg_item *item;
-	struct nlattr *fmsg_nlattr;
-	int err = 0;
-	int i = 0;
-
-	fmsg_nlattr = nla_nest_start_noflag(skb, DEVLINK_ATTR_FMSG);
-	if (!fmsg_nlattr)
-		return -EMSGSIZE;
-
-	list_for_each_entry(item, &fmsg->item_list, list) {
-		if (i < *start) {
-			i++;
-			continue;
-		}
-
-		switch (item->attrtype) {
-		case DEVLINK_ATTR_FMSG_OBJ_NEST_START:
-		case DEVLINK_ATTR_FMSG_PAIR_NEST_START:
-		case DEVLINK_ATTR_FMSG_ARR_NEST_START:
-		case DEVLINK_ATTR_FMSG_NEST_END:
-			err = nla_put_flag(skb, item->attrtype);
-			break;
-		case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA:
-			err = devlink_fmsg_item_fill_type(item, skb);
-			if (err)
-				break;
-			err = devlink_fmsg_item_fill_data(item, skb);
-			break;
-		case DEVLINK_ATTR_FMSG_OBJ_NAME:
-			err = nla_put_string(skb, item->attrtype,
-					     (char *) &item->value);
-			break;
-		default:
-			err = -EINVAL;
-			break;
-		}
-		if (!err)
-			*start = ++i;
-		else
-			break;
-	}
-
-	nla_nest_end(skb, fmsg_nlattr);
-	return err;
-}
-
-static int devlink_fmsg_snd(struct devlink_fmsg *fmsg,
-			    struct genl_info *info,
-			    enum devlink_command cmd, int flags)
-{
-	struct nlmsghdr *nlh;
-	struct sk_buff *skb;
-	bool last = false;
-	int index = 0;
-	void *hdr;
-	int err;
-
-	while (!last) {
-		int tmp_index = index;
-
-		skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
-		if (!skb)
-			return -ENOMEM;
-
-		hdr = genlmsg_put(skb, info->snd_portid, info->snd_seq,
-				  &devlink_nl_family, flags | NLM_F_MULTI, cmd);
-		if (!hdr) {
-			err = -EMSGSIZE;
-			goto nla_put_failure;
-		}
-
-		err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
-		if (!err)
-			last = true;
-		else if (err != -EMSGSIZE || tmp_index == index)
-			goto nla_put_failure;
-
-		genlmsg_end(skb, hdr);
-		err = genlmsg_reply(skb, info);
-		if (err)
-			return err;
-	}
-
-	skb = genlmsg_new(GENLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (!skb)
-		return -ENOMEM;
-	nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
-			NLMSG_DONE, 0, flags | NLM_F_MULTI);
-	if (!nlh) {
-		err = -EMSGSIZE;
-		goto nla_put_failure;
-	}
-
-	return genlmsg_reply(skb, info);
-
-nla_put_failure:
-	nlmsg_free(skb);
-	return err;
-}
-
-static int devlink_fmsg_dumpit(struct devlink_fmsg *fmsg, struct sk_buff *skb,
-			       struct netlink_callback *cb,
-			       enum devlink_command cmd)
-{
-	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
-	int index = state->idx;
-	int tmp_index = index;
-	void *hdr;
-	int err;
-
-	hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
-			  &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, cmd);
-	if (!hdr) {
-		err = -EMSGSIZE;
-		goto nla_put_failure;
-	}
-
-	err = devlink_fmsg_prepare_skb(fmsg, skb, &index);
-	if ((err && err != -EMSGSIZE) || tmp_index == index)
-		goto nla_put_failure;
-
-	state->idx = index;
-	genlmsg_end(skb, hdr);
-	return skb->len;
-
-nla_put_failure:
-	genlmsg_cancel(skb, hdr);
-	return err;
-}
-
-struct devlink_health_reporter {
-	struct list_head list;
-	void *priv;
-	const struct devlink_health_reporter_ops *ops;
-	struct devlink *devlink;
-	struct devlink_port *devlink_port;
-	struct devlink_fmsg *dump_fmsg;
-	struct mutex dump_lock; /* lock parallel read/write from dump buffers */
-	u64 graceful_period;
-	bool auto_recover;
-	bool auto_dump;
-	u8 health_state;
-	u64 dump_ts;
-	u64 dump_real_ts;
-	u64 error_count;
-	u64 recovery_count;
-	u64 last_recovery_ts;
-};
-
-void *
-devlink_health_reporter_priv(struct devlink_health_reporter *reporter)
-{
-	return reporter->priv;
-}
-EXPORT_SYMBOL_GPL(devlink_health_reporter_priv);
-
-static struct devlink_health_reporter *
-__devlink_health_reporter_find_by_name(struct list_head *reporter_list,
-				       const char *reporter_name)
-{
-	struct devlink_health_reporter *reporter;
-
-	list_for_each_entry(reporter, reporter_list, list)
-		if (!strcmp(reporter->ops->name, reporter_name))
-			return reporter;
-	return NULL;
-}
-
-static struct devlink_health_reporter *
-devlink_health_reporter_find_by_name(struct devlink *devlink,
-				     const char *reporter_name)
-{
-	return __devlink_health_reporter_find_by_name(&devlink->reporter_list,
-						      reporter_name);
-}
-
-static struct devlink_health_reporter *
-devlink_port_health_reporter_find_by_name(struct devlink_port *devlink_port,
-					  const char *reporter_name)
-{
-	return __devlink_health_reporter_find_by_name(&devlink_port->reporter_list,
-						      reporter_name);
-}
-
-static struct devlink_health_reporter *
-__devlink_health_reporter_create(struct devlink *devlink,
-				 const struct devlink_health_reporter_ops *ops,
-				 u64 graceful_period, void *priv)
-{
-	struct devlink_health_reporter *reporter;
-
-	if (WARN_ON(graceful_period && !ops->recover))
-		return ERR_PTR(-EINVAL);
-
-	reporter = kzalloc(sizeof(*reporter), GFP_KERNEL);
-	if (!reporter)
-		return ERR_PTR(-ENOMEM);
-
-	reporter->priv = priv;
-	reporter->ops = ops;
-	reporter->devlink = devlink;
-	reporter->graceful_period = graceful_period;
-	reporter->auto_recover = !!ops->recover;
-	reporter->auto_dump = !!ops->dump;
-	mutex_init(&reporter->dump_lock);
-	return reporter;
-}
-
-/**
- *	devl_port_health_reporter_create - create devlink health reporter for
- *	                                   specified port instance
- *
- *	@port: devlink_port which should contain the new reporter
- *	@ops: ops
- *	@graceful_period: to avoid recovery loops, in msecs
- *	@priv: priv
- */
-struct devlink_health_reporter *
-devl_port_health_reporter_create(struct devlink_port *port,
-				 const struct devlink_health_reporter_ops *ops,
-				 u64 graceful_period, void *priv)
-{
-	struct devlink_health_reporter *reporter;
-
-	devl_assert_locked(port->devlink);
-
-	if (__devlink_health_reporter_find_by_name(&port->reporter_list,
-						   ops->name))
-		return ERR_PTR(-EEXIST);
-
-	reporter = __devlink_health_reporter_create(port->devlink, ops,
-						    graceful_period, priv);
-	if (IS_ERR(reporter))
-		return reporter;
-
-	reporter->devlink_port = port;
-	list_add_tail(&reporter->list, &port->reporter_list);
-	return reporter;
-}
-EXPORT_SYMBOL_GPL(devl_port_health_reporter_create);
-
-struct devlink_health_reporter *
-devlink_port_health_reporter_create(struct devlink_port *port,
-				    const struct devlink_health_reporter_ops *ops,
-				    u64 graceful_period, void *priv)
-{
-	struct devlink_health_reporter *reporter;
-	struct devlink *devlink = port->devlink;
-
-	devl_lock(devlink);
-	reporter = devl_port_health_reporter_create(port, ops,
-						    graceful_period, priv);
-	devl_unlock(devlink);
-	return reporter;
-}
-EXPORT_SYMBOL_GPL(devlink_port_health_reporter_create);
-
-/**
- *	devl_health_reporter_create - create devlink health reporter
- *
- *	@devlink: devlink
- *	@ops: ops
- *	@graceful_period: to avoid recovery loops, in msecs
- *	@priv: priv
- */
-struct devlink_health_reporter *
-devl_health_reporter_create(struct devlink *devlink,
-			    const struct devlink_health_reporter_ops *ops,
-			    u64 graceful_period, void *priv)
-{
-	struct devlink_health_reporter *reporter;
-
-	devl_assert_locked(devlink);
-
-	if (devlink_health_reporter_find_by_name(devlink, ops->name))
-		return ERR_PTR(-EEXIST);
-
-	reporter = __devlink_health_reporter_create(devlink, ops,
-						    graceful_period, priv);
-	if (IS_ERR(reporter))
-		return reporter;
-
-	list_add_tail(&reporter->list, &devlink->reporter_list);
-	return reporter;
-}
-EXPORT_SYMBOL_GPL(devl_health_reporter_create);
-
-struct devlink_health_reporter *
-devlink_health_reporter_create(struct devlink *devlink,
-			       const struct devlink_health_reporter_ops *ops,
-			       u64 graceful_period, void *priv)
-{
-	struct devlink_health_reporter *reporter;
-
-	devl_lock(devlink);
-	reporter = devl_health_reporter_create(devlink, ops,
-					       graceful_period, priv);
-	devl_unlock(devlink);
-	return reporter;
-}
-EXPORT_SYMBOL_GPL(devlink_health_reporter_create);
-
-static void
-devlink_health_reporter_free(struct devlink_health_reporter *reporter)
-{
-	mutex_destroy(&reporter->dump_lock);
-	if (reporter->dump_fmsg)
-		devlink_fmsg_free(reporter->dump_fmsg);
-	kfree(reporter);
-}
-
-/**
- *	devl_health_reporter_destroy - destroy devlink health reporter
- *
- *	@reporter: devlink health reporter to destroy
- */
-void
-devl_health_reporter_destroy(struct devlink_health_reporter *reporter)
-{
-	devl_assert_locked(reporter->devlink);
-
-	list_del(&reporter->list);
-	devlink_health_reporter_free(reporter);
-}
-EXPORT_SYMBOL_GPL(devl_health_reporter_destroy);
-
-void
-devlink_health_reporter_destroy(struct devlink_health_reporter *reporter)
-{
-	struct devlink *devlink = reporter->devlink;
-
-	devl_lock(devlink);
-	devl_health_reporter_destroy(reporter);
-	devl_unlock(devlink);
-}
-EXPORT_SYMBOL_GPL(devlink_health_reporter_destroy);
-
-static int
-devlink_nl_health_reporter_fill(struct sk_buff *msg,
-				struct devlink_health_reporter *reporter,
-				enum devlink_command cmd, u32 portid,
-				u32 seq, int flags)
-{
-	struct devlink *devlink = reporter->devlink;
-	struct nlattr *reporter_attr;
-	void *hdr;
-
-	hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd);
-	if (!hdr)
-		return -EMSGSIZE;
-
-	if (devlink_nl_put_handle(msg, devlink))
-		goto genlmsg_cancel;
-
-	if (reporter->devlink_port) {
-		if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, reporter->devlink_port->index))
-			goto genlmsg_cancel;
-	}
-	reporter_attr = nla_nest_start_noflag(msg,
-					      DEVLINK_ATTR_HEALTH_REPORTER);
-	if (!reporter_attr)
-		goto genlmsg_cancel;
-	if (nla_put_string(msg, DEVLINK_ATTR_HEALTH_REPORTER_NAME,
-			   reporter->ops->name))
-		goto reporter_nest_cancel;
-	if (nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_STATE,
-		       reporter->health_state))
-		goto reporter_nest_cancel;
-	if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_ERR_COUNT,
-			      reporter->error_count, DEVLINK_ATTR_PAD))
-		goto reporter_nest_cancel;
-	if (nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_RECOVER_COUNT,
-			      reporter->recovery_count, DEVLINK_ATTR_PAD))
-		goto reporter_nest_cancel;
-	if (reporter->ops->recover &&
-	    nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD,
-			      reporter->graceful_period,
-			      DEVLINK_ATTR_PAD))
-		goto reporter_nest_cancel;
-	if (reporter->ops->recover &&
-	    nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER,
-		       reporter->auto_recover))
-		goto reporter_nest_cancel;
-	if (reporter->dump_fmsg &&
-	    nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS,
-			      jiffies_to_msecs(reporter->dump_ts),
-			      DEVLINK_ATTR_PAD))
-		goto reporter_nest_cancel;
-	if (reporter->dump_fmsg &&
-	    nla_put_u64_64bit(msg, DEVLINK_ATTR_HEALTH_REPORTER_DUMP_TS_NS,
-			      reporter->dump_real_ts, DEVLINK_ATTR_PAD))
-		goto reporter_nest_cancel;
-	if (reporter->ops->dump &&
-	    nla_put_u8(msg, DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP,
-		       reporter->auto_dump))
-		goto reporter_nest_cancel;
-
-	nla_nest_end(msg, reporter_attr);
-	genlmsg_end(msg, hdr);
-	return 0;
-
-reporter_nest_cancel:
-	nla_nest_end(msg, reporter_attr);
-genlmsg_cancel:
-	genlmsg_cancel(msg, hdr);
-	return -EMSGSIZE;
-}
-
-static void devlink_recover_notify(struct devlink_health_reporter *reporter,
-				   enum devlink_command cmd)
-{
-	struct devlink *devlink = reporter->devlink;
-	struct sk_buff *msg;
-	int err;
-
-	WARN_ON(cmd != DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
-	WARN_ON(!xa_get_mark(&devlinks, devlink->index, DEVLINK_REGISTERED));
-
-	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (!msg)
-		return;
-
-	err = devlink_nl_health_reporter_fill(msg, reporter, cmd, 0, 0, 0);
-	if (err) {
-		nlmsg_free(msg);
-		return;
-	}
-
-	genlmsg_multicast_netns(&devlink_nl_family, devlink_net(devlink), msg,
-				0, DEVLINK_MCGRP_CONFIG, GFP_KERNEL);
-}
-
-void
-devlink_health_reporter_recovery_done(struct devlink_health_reporter *reporter)
-{
-	reporter->recovery_count++;
-	reporter->last_recovery_ts = jiffies;
-}
-EXPORT_SYMBOL_GPL(devlink_health_reporter_recovery_done);
-
-static int
-devlink_health_reporter_recover(struct devlink_health_reporter *reporter,
-				void *priv_ctx, struct netlink_ext_ack *extack)
-{
-	int err;
-
-	if (reporter->health_state == DEVLINK_HEALTH_REPORTER_STATE_HEALTHY)
-		return 0;
-
-	if (!reporter->ops->recover)
-		return -EOPNOTSUPP;
-
-	err = reporter->ops->recover(reporter, priv_ctx, extack);
-	if (err)
-		return err;
-
-	devlink_health_reporter_recovery_done(reporter);
-	reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_HEALTHY;
-	devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
-
-	return 0;
-}
-
-static void
-devlink_health_dump_clear(struct devlink_health_reporter *reporter)
-{
-	if (!reporter->dump_fmsg)
-		return;
-	devlink_fmsg_free(reporter->dump_fmsg);
-	reporter->dump_fmsg = NULL;
-}
-
-static int devlink_health_do_dump(struct devlink_health_reporter *reporter,
-				  void *priv_ctx,
-				  struct netlink_ext_ack *extack)
-{
-	int err;
-
-	if (!reporter->ops->dump)
-		return 0;
-
-	if (reporter->dump_fmsg)
-		return 0;
-
-	reporter->dump_fmsg = devlink_fmsg_alloc();
-	if (!reporter->dump_fmsg) {
-		err = -ENOMEM;
-		return err;
-	}
-
-	err = devlink_fmsg_obj_nest_start(reporter->dump_fmsg);
-	if (err)
-		goto dump_err;
-
-	err = reporter->ops->dump(reporter, reporter->dump_fmsg,
-				  priv_ctx, extack);
-	if (err)
-		goto dump_err;
-
-	err = devlink_fmsg_obj_nest_end(reporter->dump_fmsg);
-	if (err)
-		goto dump_err;
-
-	reporter->dump_ts = jiffies;
-	reporter->dump_real_ts = ktime_get_real_ns();
-
-	return 0;
-
-dump_err:
-	devlink_health_dump_clear(reporter);
-	return err;
-}
-
-int devlink_health_report(struct devlink_health_reporter *reporter,
-			  const char *msg, void *priv_ctx)
-{
-	enum devlink_health_reporter_state prev_health_state;
-	struct devlink *devlink = reporter->devlink;
-	unsigned long recover_ts_threshold;
-	int ret;
-
-	/* write a log message of the current error */
-	WARN_ON(!msg);
-	trace_devlink_health_report(devlink, reporter->ops->name, msg);
-	reporter->error_count++;
-	prev_health_state = reporter->health_state;
-	reporter->health_state = DEVLINK_HEALTH_REPORTER_STATE_ERROR;
-	devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
-
-	/* abort if the previous error wasn't recovered */
-	recover_ts_threshold = reporter->last_recovery_ts +
-			       msecs_to_jiffies(reporter->graceful_period);
-	if (reporter->auto_recover &&
-	    (prev_health_state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY ||
-	     (reporter->last_recovery_ts && reporter->recovery_count &&
-	      time_is_after_jiffies(recover_ts_threshold)))) {
-		trace_devlink_health_recover_aborted(devlink,
-						     reporter->ops->name,
-						     reporter->health_state,
-						     jiffies -
-						     reporter->last_recovery_ts);
-		return -ECANCELED;
-	}
-
-	if (reporter->auto_dump) {
-		mutex_lock(&reporter->dump_lock);
-		/* store current dump of current error, for later analysis */
-		devlink_health_do_dump(reporter, priv_ctx, NULL);
-		mutex_unlock(&reporter->dump_lock);
-	}
-
-	if (!reporter->auto_recover)
-		return 0;
-
-	devl_lock(devlink);
-	ret = devlink_health_reporter_recover(reporter, priv_ctx, NULL);
-	devl_unlock(devlink);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(devlink_health_report);
-
-static struct devlink_health_reporter *
-devlink_health_reporter_get_from_attrs(struct devlink *devlink,
-				       struct nlattr **attrs)
-{
-	struct devlink_port *devlink_port;
-	char *reporter_name;
-
-	if (!attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME])
-		return NULL;
-
-	reporter_name = nla_data(attrs[DEVLINK_ATTR_HEALTH_REPORTER_NAME]);
-	devlink_port = devlink_port_get_from_attrs(devlink, attrs);
-	if (IS_ERR(devlink_port))
-		return devlink_health_reporter_find_by_name(devlink,
-							    reporter_name);
-	else
-		return devlink_port_health_reporter_find_by_name(devlink_port,
-								 reporter_name);
-}
-
-static struct devlink_health_reporter *
-devlink_health_reporter_get_from_info(struct devlink *devlink,
-				      struct genl_info *info)
-{
-	return devlink_health_reporter_get_from_attrs(devlink, info->attrs);
-}
-
-static struct devlink_health_reporter *
-devlink_health_reporter_get_from_cb(struct netlink_callback *cb)
-{
-	const struct genl_dumpit_info *info = genl_dumpit_info(cb);
-	struct devlink_health_reporter *reporter;
-	struct nlattr **attrs = info->attrs;
-	struct devlink *devlink;
-
-	devlink = devlink_get_from_attrs_lock(sock_net(cb->skb->sk), attrs);
-	if (IS_ERR(devlink))
-		return NULL;
-	devl_unlock(devlink);
-
-	reporter = devlink_health_reporter_get_from_attrs(devlink, attrs);
-	devlink_put(devlink);
-	return reporter;
-}
-
-void
-devlink_health_reporter_state_update(struct devlink_health_reporter *reporter,
-				     enum devlink_health_reporter_state state)
-{
-	if (WARN_ON(state != DEVLINK_HEALTH_REPORTER_STATE_HEALTHY &&
-		    state != DEVLINK_HEALTH_REPORTER_STATE_ERROR))
-		return;
-
-	if (reporter->health_state == state)
-		return;
-
-	reporter->health_state = state;
-	trace_devlink_health_reporter_state_update(reporter->devlink,
-						   reporter->ops->name, state);
-	devlink_recover_notify(reporter, DEVLINK_CMD_HEALTH_REPORTER_RECOVER);
-}
-EXPORT_SYMBOL_GPL(devlink_health_reporter_state_update);
-
-static int devlink_nl_cmd_health_reporter_get_doit(struct sk_buff *skb,
-						   struct genl_info *info)
-{
-	struct devlink *devlink = info->user_ptr[0];
-	struct devlink_health_reporter *reporter;
-	struct sk_buff *msg;
-	int err;
-
-	reporter = devlink_health_reporter_get_from_info(devlink, info);
-	if (!reporter)
-		return -EINVAL;
-
-	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
-	if (!msg)
-		return -ENOMEM;
-
-	err = devlink_nl_health_reporter_fill(msg, reporter,
-					      DEVLINK_CMD_HEALTH_REPORTER_GET,
-					      info->snd_portid, info->snd_seq,
-					      0);
-	if (err) {
-		nlmsg_free(msg);
-		return err;
-	}
-
-	return genlmsg_reply(msg, info);
-}
-
-static int
-devlink_nl_cmd_health_reporter_get_dump_one(struct sk_buff *msg,
-					    struct devlink *devlink,
-					    struct netlink_callback *cb)
-{
-	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
-	struct devlink_health_reporter *reporter;
-	struct devlink_port *port;
-	unsigned long port_index;
-	int idx = 0;
-	int err;
-
-	list_for_each_entry(reporter, &devlink->reporter_list, list) {
-		if (idx < state->idx) {
-			idx++;
-			continue;
-		}
-		err = devlink_nl_health_reporter_fill(msg, reporter,
-						      DEVLINK_CMD_HEALTH_REPORTER_GET,
-						      NETLINK_CB(cb->skb).portid,
-						      cb->nlh->nlmsg_seq,
-						      NLM_F_MULTI);
-		if (err) {
-			state->idx = idx;
-			return err;
-		}
-		idx++;
-	}
-	xa_for_each(&devlink->ports, port_index, port) {
-		list_for_each_entry(reporter, &port->reporter_list, list) {
-			if (idx < state->idx) {
-				idx++;
-				continue;
-			}
-			err = devlink_nl_health_reporter_fill(msg, reporter,
-							      DEVLINK_CMD_HEALTH_REPORTER_GET,
-							      NETLINK_CB(cb->skb).portid,
-							      cb->nlh->nlmsg_seq,
-							      NLM_F_MULTI);
-			if (err) {
-				state->idx = idx;
-				return err;
-			}
-			idx++;
-		}
-	}
-
-	return 0;
-}
-
-const struct devlink_cmd devl_cmd_health_reporter_get = {
-	.dump_one		= devlink_nl_cmd_health_reporter_get_dump_one,
-};
-
-static int
-devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
-					struct genl_info *info)
-{
-	struct devlink *devlink = info->user_ptr[0];
-	struct devlink_health_reporter *reporter;
-
-	reporter = devlink_health_reporter_get_from_info(devlink, info);
-	if (!reporter)
-		return -EINVAL;
-
-	if (!reporter->ops->recover &&
-	    (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD] ||
-	     info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]))
-		return -EOPNOTSUPP;
-
-	if (!reporter->ops->dump &&
-	    info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
-		return -EOPNOTSUPP;
-
-	if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD])
-		reporter->graceful_period =
-			nla_get_u64(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_GRACEFUL_PERIOD]);
-
-	if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER])
-		reporter->auto_recover =
-			nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_RECOVER]);
-
-	if (info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP])
-		reporter->auto_dump =
-		nla_get_u8(info->attrs[DEVLINK_ATTR_HEALTH_REPORTER_AUTO_DUMP]);
-
-	return 0;
-}
-
-static int devlink_nl_cmd_health_reporter_recover_doit(struct sk_buff *skb,
-						       struct genl_info *info)
-{
-	struct devlink *devlink = info->user_ptr[0];
-	struct devlink_health_reporter *reporter;
-
-	reporter = devlink_health_reporter_get_from_info(devlink, info);
-	if (!reporter)
-		return -EINVAL;
-
-	return devlink_health_reporter_recover(reporter, NULL, info->extack);
-}
-
-static int devlink_nl_cmd_health_reporter_diagnose_doit(struct sk_buff *skb,
-							struct genl_info *info)
-{
-	struct devlink *devlink = info->user_ptr[0];
-	struct devlink_health_reporter *reporter;
-	struct devlink_fmsg *fmsg;
-	int err;
-
-	reporter = devlink_health_reporter_get_from_info(devlink, info);
-	if (!reporter)
-		return -EINVAL;
-
-	if (!reporter->ops->diagnose)
-		return -EOPNOTSUPP;
-
-	fmsg = devlink_fmsg_alloc();
-	if (!fmsg)
-		return -ENOMEM;
-
-	err = devlink_fmsg_obj_nest_start(fmsg);
-	if (err)
-		goto out;
-
-	err = reporter->ops->diagnose(reporter, fmsg, info->extack);
-	if (err)
-		goto out;
-
-	err = devlink_fmsg_obj_nest_end(fmsg);
-	if (err)
-		goto out;
-
-	err = devlink_fmsg_snd(fmsg, info,
-			       DEVLINK_CMD_HEALTH_REPORTER_DIAGNOSE, 0);
-
-out:
-	devlink_fmsg_free(fmsg);
-	return err;
-}
-
-static int
-devlink_nl_cmd_health_reporter_dump_get_dumpit(struct sk_buff *skb,
-					       struct netlink_callback *cb)
-{
-	struct devlink_nl_dump_state *state = devlink_dump_state(cb);
-	struct devlink_health_reporter *reporter;
-	int err;
-
-	reporter = devlink_health_reporter_get_from_cb(cb);
-	if (!reporter)
-		return -EINVAL;
-
-	if (!reporter->ops->dump)
-		return -EOPNOTSUPP;
-
-	mutex_lock(&reporter->dump_lock);
-	if (!state->idx) {
-		err = devlink_health_do_dump(reporter, NULL, cb->extack);
-		if (err)
-			goto unlock;
-		state->dump_ts = reporter->dump_ts;
-	}
-	if (!reporter->dump_fmsg || state->dump_ts != reporter->dump_ts) {
-		NL_SET_ERR_MSG(cb->extack, "Dump trampled, please retry");
-		err = -EAGAIN;
-		goto unlock;
-	}
-
-	err = devlink_fmsg_dumpit(reporter->dump_fmsg, skb, cb,
-				  DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET);
-unlock:
-	mutex_unlock(&reporter->dump_lock);
-	return err;
-}
-
-static int
-devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
-					       struct genl_info *info)
-{
-	struct devlink *devlink = info->user_ptr[0];
-	struct devlink_health_reporter *reporter;
-
-	reporter = devlink_health_reporter_get_from_info(devlink, info);
-	if (!reporter)
-		return -EINVAL;
-
-	if (!reporter->ops->dump)
-		return -EOPNOTSUPP;
-
-	mutex_lock(&reporter->dump_lock);
-	devlink_health_dump_clear(reporter);
-	mutex_unlock(&reporter->dump_lock);
-	return 0;
-}
-
-static int devlink_nl_cmd_health_reporter_test_doit(struct sk_buff *skb,
-						    struct genl_info *info)
-{
-	struct devlink *devlink = info->user_ptr[0];
-	struct devlink_health_reporter *reporter;
-
-	reporter = devlink_health_reporter_get_from_info(devlink, info);
-	if (!reporter)
-		return -EINVAL;
-
-	if (!reporter->ops->test)
-		return -EOPNOTSUPP;
-
-	return reporter->ops->test(reporter, info->extack);
 }
 
 struct devlink_stats {