[SCTP]: SCTP_CMD_INIT_FAILED annotations.

argument stored for SCTP_CMD_INIT_FAILED is always __be16
(protocol error).  Introduced new field and accessor for
it (SCTP_PERR()); switched to their use (from SCTP_U32() and
.u32)

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/sctp/command.h

@@ -119,6 +119,7 @@ typedef union {
 	__u16 u16;
 	__u8 u8;
 	int error;
+	__be16 err;
 	sctp_state_t state;
 	sctp_event_timeout_t to;
 	unsigned long zero;
@@ -167,6 +168,7 @@ SCTP_ARG_CONSTRUCTOR(U32,	__u32, u32)
 SCTP_ARG_CONSTRUCTOR(U16,	__u16, u16)
 SCTP_ARG_CONSTRUCTOR(U8,	__u8, u8)
 SCTP_ARG_CONSTRUCTOR(ERROR,     int, error)
+SCTP_ARG_CONSTRUCTOR(PERR,      __be16, err)	/* protocol error */
 SCTP_ARG_CONSTRUCTOR(STATE,	sctp_state_t, state)
 SCTP_ARG_CONSTRUCTOR(TO,	sctp_event_timeout_t, to)
 SCTP_ARG_CONSTRUCTOR(PTR,	void *, ptr)

net/sctp/sm_sideeffect.c

@@ -1360,7 +1360,7 @@ static int sctp_cmd_interpreter(sctp_event_t event_type,
 			break;
 
 		case SCTP_CMD_INIT_FAILED:
-			sctp_cmd_init_failed(commands, asoc, cmd->obj.u32);
+			sctp_cmd_init_failed(commands, asoc, cmd->obj.err);
 			break;
 
 		case SCTP_CMD_ASSOC_FAILED:

net/sctp/sm_statefuns.c

@@ -2138,7 +2138,7 @@ static sctp_disposition_t sctp_sf_do_5_2_6_stale(const struct sctp_endpoint *ep,
 		sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR,
 				SCTP_ERROR(ETIMEDOUT));
 		sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
-				SCTP_U32(SCTP_ERROR_STALE_COOKIE));
+				SCTP_PERR(SCTP_ERROR_STALE_COOKIE));
 		return SCTP_DISPOSITION_DELETE_TCB;
 	}
 
@@ -2370,7 +2370,7 @@ static sctp_disposition_t sctp_stop_t1_and_abort(sctp_cmd_seq_t *commands,
 	sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR, SCTP_ERROR(sk_err));
 	/* CMD_INIT_FAILED will DELETE_TCB. */
 	sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
-			SCTP_U32(error));
+			SCTP_PERR(error));
 	return SCTP_DISPOSITION_ABORT;
 }
 
@@ -3743,7 +3743,7 @@ static sctp_disposition_t sctp_sf_violation_chunklen(
 		sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR,
 				SCTP_ERROR(ECONNREFUSED));
 		sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
-				SCTP_U32(SCTP_ERROR_PROTO_VIOLATION));
+				SCTP_PERR(SCTP_ERROR_PROTO_VIOLATION));
 	} else {
 		sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR,
 			        SCTP_ERROR(ECONNABORTED));
@@ -4199,7 +4199,7 @@ sctp_disposition_t sctp_sf_cookie_wait_prm_abort(
 			SCTP_ERROR(ECONNREFUSED));
 	/* Delete the established association. */
 	sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
-			SCTP_U32(SCTP_ERROR_USER_ABORT));
+			SCTP_PERR(SCTP_ERROR_USER_ABORT));
 
 	return retval;
 }
@@ -4693,7 +4693,7 @@ sctp_disposition_t sctp_sf_t1_init_timer_expire(const struct sctp_endpoint *ep,
 		sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR,
 				SCTP_ERROR(ETIMEDOUT));
 		sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
-				SCTP_U32(SCTP_ERROR_NO_ERROR));
+				SCTP_PERR(SCTP_ERROR_NO_ERROR));
 		return SCTP_DISPOSITION_DELETE_TCB;
 	}
 
@@ -4745,7 +4745,7 @@ sctp_disposition_t sctp_sf_t1_cookie_timer_expire(const struct sctp_endpoint *ep
 		sctp_add_cmd_sf(commands, SCTP_CMD_SET_SK_ERR,
 				SCTP_ERROR(ETIMEDOUT));
 		sctp_add_cmd_sf(commands, SCTP_CMD_INIT_FAILED,
-				SCTP_U32(SCTP_ERROR_NO_ERROR));
+				SCTP_PERR(SCTP_ERROR_NO_ERROR));
 		return SCTP_DISPOSITION_DELETE_TCB;
 	}