ipmi: Add a panic handler for IPMI users (91e2dd0a) · Commits · 戴 / test

drivers/char/ipmi/ipmi_msghandler.c

+104 −110

Original line number	Diff line number	Diff line
		@@ -4956,13 +4956,15 @@ static void device_id_fetcher(ipmi_smi_t intf, struct ipmi_recv_msg *msg)
		}
		}

		static void send_panic_events(char *str)
		static void send_panic_events(ipmi_smi_t intf, char *str)
		{
		struct kernel_ipmi_msg msg;
		ipmi_smi_t intf;
		unsigned char data[16];
		struct ipmi_system_interface_addr *si;
		struct ipmi_addr addr;
		char *p = str;
		struct ipmi_ipmb_addr *ipmb;
		int j;

		if (ipmi_send_panic_event == IPMI_SEND_PANIC_EVENT_NONE)
		return;
		@@ -4993,15 +4995,8 @@ static void send_panic_events(char *str)
		data[7] = str[2];
		}

		/* For every registered interface, send the event. */
		list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
		if (!intf->handlers \|\| !intf->handlers->poll)
		/* Interface is not ready or can't run at panic time. */
		continue;

		/* Send the event announcing the panic. */
		ipmi_panic_request_and_wait(intf, &addr, &msg);
		}

		/*
		* On every interface, dump a bunch of OEM event holding the
		@@ -5010,16 +5005,6 @@ static void send_panic_events(char *str)
		if (ipmi_send_panic_event != IPMI_SEND_PANIC_EVENT_STRING \|\| !str)
		return;

		/* For every registered interface, send the event. */
		list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
		char *p = str;
		struct ipmi_ipmb_addr *ipmb;
		int j;

		if (intf->intf_num == -1)
		/* Interface was not ready yet. */
		continue;

		/*
		* intf_num is used as an marker to tell if the
		* interface is valid. Thus we need a read barrier to
		@@ -5088,7 +5073,7 @@ static void send_panic_events(char *str)
		si->channel = IPMI_BMC_CHANNEL;
		si->lun = 0;
		} else
		continue; /* No where to send the event. */
		return; /* No where to send the event. */

		msg.netfn = IPMI_NETFN_STORAGE_REQUEST; /* Storage. */
		msg.cmd = IPMI_ADD_SEL_ENTRY_CMD;
		@@ -5116,7 +5101,6 @@ static void send_panic_events(char *str)
		ipmi_panic_request_and_wait(intf, &addr, &msg);
		}
		}
		}

		static int has_panicked;

		@@ -5125,6 +5109,7 @@ static int panic_event(struct notifier_block *this,
		void *ptr)
		{
		ipmi_smi_t intf;
		ipmi_user_t user;

		if (has_panicked)
		return NOTIFY_DONE;
		@@ -5132,10 +5117,13 @@ static int panic_event(struct notifier_block *this,

		/* For every registered interface, set it to run to completion. */
		list_for_each_entry_rcu(intf, &ipmi_interfaces, link) {
		if (!intf->handlers)
		if (!intf->handlers \|\| intf->intf_num == -1)
		/* Interface is not ready. */
		continue;

		if (!intf->handlers->poll)
		continue;

		/*
		* If we were interrupted while locking xmit_msgs_lock or
		* waiting_rcv_msgs_lock, the corresponding list may be
		@@ -5157,9 +5145,15 @@ static int panic_event(struct notifier_block *this,
		if (intf->handlers->set_run_to_completion)
		intf->handlers->set_run_to_completion(intf->send_info,
		1);

		list_for_each_entry_rcu(user, &intf->users, link) {
		if (user->handler->ipmi_panic_handler)
		user->handler->ipmi_panic_handler(
		user->handler_data);
		}

		send_panic_events(ptr);
		send_panic_events(intf, ptr);
		}

		return NOTIFY_DONE;
		}

include/linux/ipmi.h

+6 −0

Original line number	Diff line number	Diff line
		@@ -77,6 +77,12 @@ struct ipmi_user_hndl {
		/* Called when the interface detects a watchdog pre-timeout. If
		this is NULL, it will be ignored for the user. */
		void (ipmi_watchdog_pretimeout)(void handler_data);

		/*
		* If not NULL, called at panic time after the interface has
		* been set up to handle run to completion.
		*/
		void (ipmi_panic_handler)(void handler_data);
		};

		/* Create a new user of the IPMI layer on the given interface number. */

Admin message