diff options
Diffstat (limited to 'net/devlink/health.c')
| -rw-r--r-- | net/devlink/health.c | 136 |
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); +} |