'\" te .\" Copyright (c) 2006, Sun Microsystems, Inc. All Rights Reserved. .TH ddi_log_sysevent 9F "16 Jan 2006" "SunOS 5.11" "Kernel Functions for Drivers" .SH NAME ddi_log_sysevent \- log system event for drivers .SH SYNOPSIS .LP .nf #include #include \fBint\fR \fBddi_log_sysevent\fR(\fBdev_info_t *\fR\fIdip\fR, \fBchar *\fR\fIvendor\fR, \fBchar *\fR\fIclass\fR, \fBchar *\fR\fIsubclass\fR, \fBnvlist_t *\fR\fIattr_list\fR, \fBsysevent_id_t *\fR\fIeidp\fR, \fBint\fR \fIsleep_flag\fR); .fi .SH INTERFACE LEVEL .sp .LP Solaris DDI specific (Solaris DDI). .SH PARAMETERS .sp .ne 2 .mk .na \fB\fIdip\fR\fR .ad .RS 14n .rt A pointer to the \fBdev_info\fR node for this driver. .RE .sp .ne 2 .mk .na \fB\fIvendor\fR\fR .ad .RS 14n .rt A pointer to a string defining the vendor. Third-party drivers should use their company's stock symbol (or similarly enduring identifier). Sun-supplied drivers should use \fBDDI_VENDOR_SUNW\fR. .RE .sp .ne 2 .mk .na \fB\fIclass\fR\fR .ad .RS 14n .rt A pointer to a string defining the event class. .RE .sp .ne 2 .mk .na \fB\fIsubclass\fR\fR .ad .RS 14n .rt A pointer to a string defining the event subclass. .RE .sp .ne 2 .mk .na \fB\fIattr_list\fR\fR .ad .RS 14n .rt A pointer to an \fBnvlist_t\fR, listing the name-value attributes associated with the event or NULL if there are no such attributes for this event. .RE .sp .ne 2 .mk .na \fB\fIeidp\fR\fR .ad .RS 14n .rt The address of a \fBsysevent_id_t\fR structure in which the event's sequence number and timestamp are returned if the event is successfully queued. May be NULL if this information is not of interest. See below for the definition of \fBsysevent_id_t\fR. .RE .sp .ne 2 .mk .na \fB\fIsleep_flag\fR\fR .ad .RS 14n .rt Indicates how a caller wants to handle the possibility of resources not being available. If \fIsleep_flag\fR is \fBDDI_NOSLEEP\fR, the caller does not care if the allocation fails or the queue is full and can handle a failure appropriately. If \fBsleep_flag\fR is \fBDDI_SLEEP\fR, the caller wishes to have the allocation and queuing routines wait for resources to become available. .RE .SH DESCRIPTION .sp .LP The \fBddi_log_sysevent()\fR function causes a system event, of the specified class and subclass, to be generated on behalf of the driver and queued for delivery to \fBsyseventd\fR, the user-land \fBsysevent\fR daemon. .sp .LP The publisher string for the event is constructed using the vendor name and driver name, with the format: .sp .in +2 .nf "\fI\fR:kern:\fI\fR" .fi .in -2 .sp .sp .LP The two fields of \fBeidp\fR, \fBeid_seq\fR and \fBeid_ts\fR, are sufficient to uniquely identify an event. .SH STRUCTURE MEMBERS .sp .LP The structure members of \fBsysevent_id_t\fR are: .sp .in +2 .nf uint64_t eid_seq; /* sysevent sequence number */ hrtime_t eid_ts; /* sysevent timestamp */ .fi .in -2 .SH RETURN VALUES .sp .LP The \fBddi_log_sysevent()\fR function returns: .sp .ne 2 .mk .na \fB\fBDDI_SUCCESS\fR\fR .ad .RS 18n .rt The event has been queued for delivery successfully. .RE .sp .ne 2 .mk .na \fB\fBDDI_ENOMEM\fR\fR .ad .RS 18n .rt There is not enough memory to queue the system event at this time. \fBDDI_ENOMEM\fR cannot be returned when \fIsleep_flag\fR is \fBDDI_SLEEP\fR. .RE .sp .ne 2 .mk .na \fB\fBDDI_EBUSY\fR\fR .ad .RS 18n .rt The system event queue is full at this time. \fBDDI_EBUSY\fR cannot be returned when \fIsleep_flag\fR is \fBDDI_SLEEP\fR. .RE .sp .ne 2 .mk .na \fB\fBDDI_ETRANSPORT\fR\fR .ad .RS 18n .rt The \fBsyseventd\fR daemon is not responding and events cannot be queued or delivered at this time. \fBDDI_ETRANSPORT\fR can be returned even when \fIsleep_flag\fR is \fBDDI_SLEEP\fR. .RE .sp .ne 2 .mk .na \fB\fBDDI_ECONTEXT\fR\fR .ad .RS 18n .rt \fIsleep_flag\fR is DDI_SLEEP and the driver is running in interrupt context. .RE .sp .LP \fBddi_log_sysevent\fR supports the following data types: .br .in +2 DATA_TYPE_BYTE .in -2 .br .in +2 DATA_TYPE_INT16 .in -2 .br .in +2 DATA_TYPE_UINT16 .in -2 .br .in +2 DATA_TYPE_INT32 .in -2 .br .in +2 DATA_TYPE_UINT32 .in -2 .br .in +2 DATA_TYPE_INT64 .in -2 .br .in +2 DATA_TYPE_UINT64 .in -2 .br .in +2 DATA_TYPE_STRING .in -2 .br .in +2 DATA_TYPE_BYTE_ARRAY .in -2 .br .in +2 DATA_TYPE_INT16_ARRAY .in -2 .br .in +2 DATA_TYPE_UINT16_ARRAY .in -2 .br .in +2 DATA_TYPE_INT32_ARRAY .in -2 .br .in +2 DATA_TYPE_UINT32_ARRAY .in -2 .br .in +2 DATA_TYPE_INT64_ARRAY .in -2 .br .in +2 DATA_TYPE_UINT64_ARRAY .in -2 .SH CONTEXT .sp .LP The \fBddi_log_sysevent()\fR function can be called from user, interrupt, or kernel context, except when \fIsleep_flag\fR is \fBDDI_SLEEP\fR, in which case it cannot be called from interrupt context. .SH EXAMPLES .LP \fBExample 1 \fRLogging System Event with No Attributes .sp .in +2 .nf if (ddi_log_sysevent(dip, DDI_VENDOR_SUNW, "class", "subclass", NULL, NULL, DDI_SLEEP) != DDI_SUCCESS) { cmn_err(CE_WARN, "error logging system event\en"); } .fi .in -2 .LP \fBExample 2 \fRLogging System Event with Two Name/Value Attributes, an Integer and a String .sp .in +2 .nf nvlist_t *attr_list; sysevent_id_t eid; if (nvlist_alloc(&attr_list, NV_UNIQUE_NAME_TYPE, KM_SLEEP) == 0) { err = nvlist_add_uint32(attr_list, int_name, int_value); if (err == 0) err = nvlist_add_string(attr_list, str_name, str_value); if (err == 0) err = ddi_log_sysevent(dip, DDI_VENDOR_SUNW, "class", "subclass", attr_list, &eid, DDI_SLEEP); if (err != DDI_SUCCESS) cmn_err(CE_WARN, "error logging system event\en"); nvlist_free(attr_list); } .fi .in -2 .LP \fBExample 3 \fRUse Timeout to Handle \fBnvlist\fR and System Event Resource Allocation Failures .sp .LP Since no blocking calls are made, this example would be useable from a driver needing to generate an event from interrupt context. .sp .in +2 .nf static int xx_se_timeout_handler(xx_state_t *xx) { xx->xx_timeoutid = (xx_generate_event(xx) ? timeout(xx_se_timeout_handler, xx, 4) : 0); } static int xx_generate_event(xx_state_t *xx) { int err; err = nvlist_alloc(&xx->xx_ev_attrlist, NV_UNIQUE_NAME_TYPE, 0); if (err != 0) return (1); err = nvlist_add_uint32(&xx->xx_ev_attrlist, xx->xx_ev_name, xx->xx_ev_value); if (err != 0) { nvlist_free(xx->xx_ev_attrlist); return(1); } err = ddi_log_sysevent(xx->xx_dip, DDI_VENDOR_SUNW, xx->xx_ev_class, xx->xx_ev_sbclass, xx->xx_ev_attrlist, NULL, DDI_NOSLEEP); nvlist_free(xx->xx_ev_attrlist); if (err == DDI_SUCCESS || err == DDI_ETRANSPORT) { if (err == DDI_ETRANSPORT) cmn_err(CE_WARN, "cannot log system event\en"); return (0); } return (1); } .fi .in -2 .SH SEE ALSO .sp .LP \fBsyseventd\fR(1M), \fBattributes\fR(5), \fBnvlist_add_boolean\fR(9F), \fBnvlist_alloc\fR(9F) .sp .LP \fIWriting Device Drivers for Oracle Solaris 11.2\fR