devlink: Move devlink health report and recover to health file

Move devlink health report helper and recover callback and related code
from leftover.c to health.c. No functional change in this patch.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 136 insertions, 0 deletions

diff --git a/net/devlink/health.c b/net/devlink/health.c
index 1c92f369c918..bfeb71f17ff0 100644
--- a/net/devlink/health.c
+++ b/net/devlink/health.c
@@ -5,6 +5,7 @@
  */
 
 #include <net/genetlink.h>
+#include <trace/events/devlink.h>
 #include "devl_internal.h"
 
 void *
@@ -408,3 +409,138 @@ int devlink_nl_cmd_health_reporter_set_doit(struct sk_buff *skb,
 
 	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;
+}
+
+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);
+}