sctp: implement event notification SCTP_SENDER_DRY_EVENT (e1cdd553) · Commits · e / devices / android_kernel_xiaomi_nabu

include/net/sctp/sm.h

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -165,6 +165,7 @@ sctp_state_fn_t sctp_sf_do_prm_requestheartbeat;
	sctp_state_fn_t sctp_sf_do_prm_asconf;		sctp_state_fn_t sctp_sf_do_prm_asconf;

	/* Prototypes for other event state functions. */		/* Prototypes for other event state functions. */
			sctp_state_fn_t sctp_sf_do_no_pending_tsn;
	sctp_state_fn_t sctp_sf_do_9_2_start_shutdown;		sctp_state_fn_t sctp_sf_do_9_2_start_shutdown;
	sctp_state_fn_t sctp_sf_do_9_2_shutdown_ack;		sctp_state_fn_t sctp_sf_do_9_2_shutdown_ack;
	sctp_state_fn_t sctp_sf_ignore_other;		sctp_state_fn_t sctp_sf_ignore_other;

include/net/sctp/ulpevent.h

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -132,6 +132,9 @@ struct sctp_ulpevent *sctp_ulpevent_make_authkey(
	const struct sctp_association *asoc, __u16 key_id,		const struct sctp_association *asoc, __u16 key_id,
	__u32 indication, gfp_t gfp);		__u32 indication, gfp_t gfp);

			struct sctp_ulpevent *sctp_ulpevent_make_sender_dry_event(
			const struct sctp_association *asoc, gfp_t gfp);

	void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,		void sctp_ulpevent_read_sndrcvinfo(const struct sctp_ulpevent *event,
	struct msghdr *);		struct msghdr *);
	__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event);		__u16 sctp_ulpevent_get_notification_type(const struct sctp_ulpevent *event);

include/net/sctp/user.h

+17 −0

Original line number	Original line	Diff line number	Diff line
	@@ -354,6 +354,20 @@ struct sctp_authkey_event {

	enum { SCTP_AUTH_NEWKEY = 0, };		enum { SCTP_AUTH_NEWKEY = 0, };

			/*
			* 6.1.9. SCTP_SENDER_DRY_EVENT
			*
			* When the SCTP stack has no more user data to send or retransmit, this
			* notification is given to the user. Also, at the time when a user app
			* subscribes to this event, if there is no data to be sent or
			* retransmit, the stack will immediately send up this notification.
			*/
			struct sctp_sender_dry_event {
			__u16 sender_dry_type;
			__u16 sender_dry_flags;
			__u32 sender_dry_length;
			sctp_assoc_t sender_dry_assoc_id;
			};

	/*		/*
	* Described in Section 7.3		* Described in Section 7.3
	@@ -369,6 +383,7 @@ struct sctp_event_subscribe {
	__u8 sctp_partial_delivery_event;		__u8 sctp_partial_delivery_event;
	__u8 sctp_adaptation_layer_event;		__u8 sctp_adaptation_layer_event;
	__u8 sctp_authentication_event;		__u8 sctp_authentication_event;
			__u8 sctp_sender_dry_event;
	};		};

	/*		/*
	@@ -392,6 +407,7 @@ union sctp_notification {
	struct sctp_adaptation_event sn_adaptation_event;		struct sctp_adaptation_event sn_adaptation_event;
	struct sctp_pdapi_event sn_pdapi_event;		struct sctp_pdapi_event sn_pdapi_event;
	struct sctp_authkey_event sn_authkey_event;		struct sctp_authkey_event sn_authkey_event;
			struct sctp_sender_dry_event sn_sender_dry_event;
	};		};

	/* Section 5.3.1		/* Section 5.3.1
	@@ -410,6 +426,7 @@ enum sctp_sn_type {
	SCTP_ADAPTATION_INDICATION,		SCTP_ADAPTATION_INDICATION,
	SCTP_AUTHENTICATION_EVENT,		SCTP_AUTHENTICATION_EVENT,
	#define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT		#define SCTP_AUTHENTICATION_INDICATION SCTP_AUTHENTICATION_EVENT
			SCTP_SENDER_DRY_EVENT,
	};		};

	/* Notification error codes used to fill up the error fields in some		/* Notification error codes used to fill up the error fields in some

net/sctp/sm_statefuns.c

+24 −0

Original line number	Original line	Diff line number	Diff line
	@@ -5076,6 +5076,30 @@ sctp_disposition_t sctp_sf_ignore_primitive(
	* These are the state functions for the OTHER events.		* These are the state functions for the OTHER events.
	***************************************************************************/		***************************************************************************/

			/*
			* When the SCTP stack has no more user data to send or retransmit, this
			* notification is given to the user. Also, at the time when a user app
			* subscribes to this event, if there is no data to be sent or
			* retransmit, the stack will immediately send up this notification.
			*/
			sctp_disposition_t sctp_sf_do_no_pending_tsn(
			const struct sctp_endpoint *ep,
			const struct sctp_association *asoc,
			const sctp_subtype_t type,
			void *arg,
			sctp_cmd_seq_t *commands)
			{
			struct sctp_ulpevent *event;

			event = sctp_ulpevent_make_sender_dry_event(asoc, GFP_ATOMIC);
			if (!event)
			return SCTP_DISPOSITION_NOMEM;

			sctp_add_cmd_sf(commands, SCTP_CMD_EVENT_ULP, SCTP_ULPEVENT(event));

			return SCTP_DISPOSITION_CONSUME;
			}

	/*		/*
	* Start the shutdown negotiation.		* Start the shutdown negotiation.
	*		*

net/sctp/sm_statetable.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -668,7 +668,7 @@ static const sctp_sm_table_entry_t primitive_event_table[SCTP_NUM_PRIMITIVE_TYPE
	/* SCTP_STATE_COOKIE_ECHOED */ \		/* SCTP_STATE_COOKIE_ECHOED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \		TYPE_SCTP_FUNC(sctp_sf_ignore_other), \
	/* SCTP_STATE_ESTABLISHED */ \		/* SCTP_STATE_ESTABLISHED */ \
	TYPE_SCTP_FUNC(sctp_sf_ignore_other), \		TYPE_SCTP_FUNC(sctp_sf_do_no_pending_tsn), \
	/* SCTP_STATE_SHUTDOWN_PENDING */ \		/* SCTP_STATE_SHUTDOWN_PENDING */ \
	TYPE_SCTP_FUNC(sctp_sf_do_9_2_start_shutdown), \		TYPE_SCTP_FUNC(sctp_sf_do_9_2_start_shutdown), \
	/* SCTP_STATE_SHUTDOWN_SENT */ \		/* SCTP_STATE_SHUTDOWN_SENT */ \