usr/src/uts/common/sys/sysevent_impl.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
  24  */
  25
  26 #ifndef _SYS_SYSEVENT_IMPL_H
  27 #define _SYS_SYSEVENT_IMPL_H
  28
  29 #include <sys/nvpair.h>
  30 #include <sys/id_space.h>
  31 #include <sys/door.h>
  32
  33 #ifdef  __cplusplus
  34 extern "C" {
  35 #endif
  36
  37 typedef uint64_t se_data_t;
  38
  39 /*
  40  * The following data structure assist in loading and extracting event
  41  * header and attribute data into contiguous memory.  Access to all typed
  42  * data done so on 64-bit boundaries.  *Do Not* alter any of the structures
  43  * defined below without thorough thought and testing.
  44  */
  45
  46 /* Attribute name */
  47 typedef struct se_name {
  48         int32_t         name_sz;
  49         int32_t         name_pad;
  50         se_data_t       name;   /* 64-bit aligned offset */
  51 } se_name_t;
  52
  53 /* Attribute value */
  54 typedef struct se_value {
  55         int32_t         value_type;     /* data type */
  56         int32_t         value_sz;
  57         se_data_t       value;          /* data value - 64-bit aligned offset */
  58 } se_value_t;
  59
  60 /* sysevent internal attribute name-value pair stored in contiguous memory */
  61 typedef struct sysevent_attr_impl {
  62         int32_t         se_attr_sz;     /* Size of attribute data */
  63         int32_t         se_attr_pad;    /* pad */
  64         se_data_t       se_attr_name;   /* name of data attribute */
  65         se_data_t       se_attr_val;    /* value and type of data */
  66 } sysevent_attr_impl_t;
  67
  68 /* Attribute list states */
  69 #define ATTR_DETACHED   0
  70 #define ATTR_ATTACHED   1
  71
  72 /*
  73  * The following type definitions describe a sysevent object that is
  74  * generated by a call to sysevent_alloc and sent to userland.
  75  */
  76
  77 /*
  78  * sysevent event header information -
  79  *      contained in every event generated.  The header and the event
  80  *      must remain 64-bit aligned.  The header, up to the attribute
  81  *      offset, can be contained in a single cache line.
  82  */
  83 typedef struct sysevent_hdr {
  84         sysevent_id_t   se_id;          /* unique identifier */
  85         uint32_t        se_version;     /* version of this data structure */
  86         uint32_t        se_flag;
  87         uint32_t        se_class;       /* event class id - reserved */
  88         uint32_t        se_subclass;    /* event subclass id - reserved */
  89         int32_t         se_payload_sz;  /* size of attr data + strings */
  90         uint16_t        se_subclass_off; /* offset to subclass string */
  91         uint16_t        se_pub_off;     /* offset to publisher string */
  92         uint64_t        se_attr_off;    /* pointer or offset to attr data */
  93 } sysevent_hdr_t;
  94
  95 /* sysevent event buffer - 64-bit aligned offsets */
  96 typedef struct sys_event_impl {
  97         sysevent_hdr_t  se_header;
  98         se_data_t       se_class_name;  /* class string in contig memory */
  99         se_data_t       se_subclass_name; /* subclass string in contig memory */
 100         se_data_t       se_pub;         /* publisher string in contig mem */
 101         se_data_t       se_attr_buf;    /* contiguous attribute memory  */
 102 } sysevent_impl_t;
 103
 104 /* Helpful defines */
 105 #define seh_version     se_header.se_version
 106 #define seh_class       se_header.se_class
 107 #define seh_subclass    se_header.se_subclass
 108 #define seh_seq         se_header.se_id.eid_seq
 109 #define seh_time        se_header.se_id.eid_ts
 110 #define seh_subclass_off se_header.se_subclass_off
 111 #define seh_pub_off     se_header.se_pub_off
 112 #define seh_attr_off    se_header.se_attr_off
 113 #define seh_payload_sz  se_header.se_payload_sz
 114 #define seh_flag        se_header.se_flag
 115
 116 /* Event buffer version */
 117 #define SYS_EVENT_VERSION       0
 118
 119 /* Event buffer flags */
 120 #define SE_PACKED_BUF   1
 121
 122 #define SYSEVENT_IMPL(ev)       ((sysevent_impl_t *)(void *)(ev))
 123 #define SE_VERSION(ev)          (SYSEVENT_IMPL(ev)->seh_version)
 124 #define SE_CLASS(ev)            (SYSEVENT_IMPL(ev)->seh_class)
 125 #define SE_SUBCLASS(ev)         (SYSEVENT_IMPL(ev)->seh_subclass)
 126 #define SE_SEQ(ev)              (SYSEVENT_IMPL(ev)->seh_seq)
 127 #define SE_TIME(ev)             (SYSEVENT_IMPL(ev)->seh_time)
 128 #define SE_SUBCLASS_OFF(ev)     (SYSEVENT_IMPL(ev)->seh_subclass_off)
 129 #define SE_PUB_OFF(ev)          (SYSEVENT_IMPL(ev)->seh_pub_off)
 130 #define SE_PAYLOAD_SZ(ev)       (SYSEVENT_IMPL(ev)->seh_payload_sz)
 131 #define SE_FLAG(ev)             (SYSEVENT_IMPL(ev)->seh_flag)
 132 #define SE_SIZE(ev)             (sizeof (sysevent_impl_t) + SE_PAYLOAD_SZ(ev))
 133 #define SE_CLASS_NAME(ev)       ((char *)&(SYSEVENT_IMPL(ev)->se_class_name))
 134 #define SE_SUBCLASS_NAME(ev)    ((char *)((caddr_t)(ev) + SE_SUBCLASS_OFF(ev)))
 135 #define SE_PUB_NAME(ev)         ((char *)((caddr_t)(ev) + SE_PUB_OFF(ev)))
 136
 137 /*
 138  * Attribute data can be stored in contiguous memory or
 139  * as a list of attribute data elements.  The storage format is determined
 140  * by the SE_PACKED_BUF flag in the event buffer flags.
 141  *
 142  */
 143
 144 /* 64-bit boundary alignment function */
 145 #define SE_ALIGN(x)     ((((ulong_t)x) + 7ul) & ~7ul)
 146
 147 /* Access to unpacked attribute list */
 148 #define SE_ATTR_PTR(ev)         (SYSEVENT_IMPL(ev)->seh_attr_off)
 149
 150 /* Offset to packed attribute data */
 151 #define SE_ATTR_OFF(ev) SE_PUB_OFF(ev) + SE_ALIGN(strlen(SE_PUB_NAME(ev)) + 1)
 152
 153 /* syseventd door */
 154 #define LOGEVENT_DOOR_UPCALL    "/var/run/sysevent_door"
 155
 156 /*
 157  * door upcall data structures
 158  */
 159 typedef struct log_event_upcall_arg {
 160         int32_t retcode;
 161         int32_t pad;
 162         sysevent_impl_t buf;
 163 } log_event_upcall_arg_t;
 164
 165 typedef struct log_eventq {
 166         struct log_eventq       *next;
 167         log_event_upcall_arg_t  arg;
 168 } log_eventq_t;
 169
 170 /* Syseventd Channel structures */
 171
 172 #define MAX_CHAN        256     /* Maximum channels per system */
 173 #define MAX_SUBSCRIBERS 100     /* Maximum subscribers per channel */
 174 #define MAX_PUBLISHERS  1       /* Maximum publishers per channel */
 175
 176 /*
 177  * Channel-based subscription structures
 178  */
 179
 180 /* Class hashing defines */
 181 #define CLASS_HASH_SZ   63
 182 #define CLASS_HASH(class_name)  ((hash_func(class_name) \
 183                                 % CLASS_HASH_SZ) + 1)
 184 #define CHAN_HASH_SZ    32
 185
 186 typedef struct subclass_lst {
 187         struct subclass_lst     *sl_next;
 188         char                    *sl_name;
 189         uchar_t                 sl_num[MAX_SUBSCRIBERS + 1];
 190 } subclass_lst_t;
 191
 192 typedef struct class_lst {
 193         struct class_lst        *cl_next;
 194         char                    *cl_name;
 195         struct subclass_lst     *cl_subclass_list;
 196 } class_lst_t;
 197
 198 /* User/Kernel Structure to pass event registration modctl data */
 199 typedef struct se_pubsub {
 200         uint32_t        ps_buflen;
 201         uint32_t        ps_channel_name_len;
 202         uint32_t        ps_id;
 203         uint32_t        ps_op;
 204         uint32_t        ps_type;
 205 } se_pubsub_t;
 206
 207 /* op defines */
 208 #define SE_REGISTER             0
 209 #define SE_UNREGISTER           1
 210 #define SE_CLEANUP              2
 211 #define SE_OPEN_REGISTRATION    3
 212 #define SE_CLOSE_REGISTRATION   4
 213 #define SE_BIND_REGISTRATION    5
 214 #define SE_UNBIND_REGISTRATION  6
 215 #define SE_GET_REGISTRATION     7
 216
 217 /* type defines */
 218 #define SUBSCRIBER      0
 219 #define PUBLISHER       1
 220
 221 /* nvpair names */
 222 #define CLASS_NAME      "class"
 223
 224 #ifdef  _KERNEL
 225
 226 typedef struct sysevent_channel_descriptor {
 227         char   *scd_channel_name;       /* Name of channel */
 228         struct sysevent_channel_descriptor *scd_next;
 229         int    scd_ref_cnt;             /* Reference count of channel opens */
 230         id_space_t *scd_subscriber_cache;       /* cache of subscriber ids */
 231         id_space_t *scd_publisher_cache;        /* cache of publisher ids */
 232         uchar_t scd_subscriber_ids[MAX_SUBSCRIBERS + 1]; /* used sub ids */
 233         uchar_t scd_publisher_ids[MAX_PUBLISHERS + 1];  /* used  pub ids */
 234         class_lst_t *scd_class_list_tbl[CLASS_HASH_SZ + 1];
 235 } sysevent_channel_descriptor_t;
 236
 237 /*
 238  * log_sysevent private interfaces
 239  */
 240 extern void log_event_init(void);
 241 extern void log_sysevent_flushq(int, uint_t);
 242 extern int log_sysevent_filename(char *);
 243 extern int log_usr_sysevent(sysevent_t *, int, sysevent_id_t *);
 244 extern int log_sysevent_copyout_data(sysevent_id_t *, size_t, caddr_t);
 245 extern int log_sysevent_free_data(sysevent_id_t *);
 246 extern int log_sysevent_register(char *, char *, se_pubsub_t *);
 247 extern uint64_t log_sysevent_new_id(void);
 248
 249 /*
 250  * Structures and definitions for general purpose event channels
 251  */
 252
 253 /* Limits */
 254 #define EVCH_MAX_CHANNELS               1024
 255 #define EVCH_MAX_BINDS_PER_CHANNEL      512
 256 #define EVCH_MAX_SUBSCRIPTIONS          32
 257 #define EVCH_SUBPOOLFACT                8
 258 #define EVCH_DEFAULT_EVENTS             2000
 259 #define EVCH_MAX_TRY_DELIVERY           3
 260
 261 /* Linkage element for evch_dlist_t lists */
 262 typedef struct evch_dlelem {
 263         struct evch_dlelem      *dl_next;
 264         struct evch_dlelem      *dl_prev;
 265 } evch_dlelem_t;
 266
 267 /* List head */
 268 typedef struct {
 269         evch_dlelem_t   dh_head;
 270         int             dh_count;
 271 } evch_dlist_t;
 272
 273 /* Placeholder for elements in a evch_squeue_t queue */
 274 typedef struct evch_qelem {
 275         struct evch_qelem       *q_next;
 276         void                    *q_objref;
 277         size_t                  q_objsize;
 278 } evch_qelem_t;
 279
 280 /* Queue head data */
 281 typedef struct {
 282         evch_qelem_t    *sq_head;
 283         evch_qelem_t    *sq_tail;
 284         uint32_t        sq_count;
 285         uint32_t        sq_highwm;
 286 } evch_squeue_t;
 287
 288 /*
 289  * Defines for event queue routines
 290  */
 291 #define EVQ_IGNORE      1
 292 #define EVQ_DELIVER     2
 293
 294 #define EVQ_CONT        0
 295 #define EVQ_AGAIN       1
 296 #define EVQ_SLEEP       2
 297
 298 /* Call back routine typedefs */
 299 typedef int (*filter_f)(void *, void *);
 300 typedef int (*deliver_f)(void *, void *);
 301 typedef int (*kerndlv_f)(void *, void *);
 302 typedef void (*destr_f)(void *, void *);
 303 typedef int (*compare_f)(evch_dlelem_t *, char *);
 304
 305 /*
 306  * Event structure handled by evch_evq_* functions. Sysevent type events are
 307  * stored as the payload.
 308  */
 309 typedef struct {
 310         uint32_t        ge_size;        /* Total size of event structure */
 311         uint32_t        ge_refcount;    /* No of queues event is linked to */
 312         destr_f         ge_destruct;    /* Destructor for event structure */
 313         uint32_t        *ge_dstcookie;  /* Cookie for destructor function */
 314         uchar_t         ge_payload[1];  /* Placeholder for event data */
 315 } evch_gevent_t;
 316
 317 /*
 318  * Event queue descriptor
 319  */
 320 typedef struct {
 321         evch_squeue_t   eq_eventq;      /* Protected by eq_dtmutex */
 322         kt_did_t        eq_thrid;       /* Id delivery thread */
 323         kmutex_t        eq_queuemx;     /* Protect. of this struct and ev q */
 324         kcondvar_t      eq_thrsleepcv;  /* Delivery thread sleeps on empty q */
 325         int             eq_dactive;     /* Event delivery is in progress */
 326         kcondvar_t      eq_dactivecv;   /* Unsubscr. has to wait on this */
 327         evch_dlist_t    eq_subscr;      /* Chain of all evch_evqsub_t */
 328         uint32_t        eq_nsleep;      /* Statistic: Publisher set to sleep */
 329         int             eq_holdmode;    /* Hold event delivery */
 330         evch_gevent_t   *eq_curevent;   /* Event currently beeing delivered */
 331         evch_qelem_t    *eq_nextev;     /* For iterating over events in a q */
 332         kcondvar_t      eq_onholdcv;    /* To signal hold mode of deliv. thr. */
 333         uchar_t         eq_tabortflag;  /* Request to abort delivery thread */
 334 } evch_eventq_t;
 335
 336 /*
 337  * Event queue per subscriber structure
 338  */
 339 typedef struct {
 340         evch_dlelem_t   su_link;
 341         filter_f        su_filter;      /* Event filter function pointer */
 342         void            *su_fcookie;    /* cookie for event filter */
 343         deliver_f       su_callb;       /* Event delivery callback */
 344         void            *su_cbcookie;   /* callback cookie */
 345 } evch_evqsub_t;
 346
 347 /* Eveny delivery type */
 348 #define EVCH_DELKERN            1       /* Kernel event delivery */
 349 #define EVCH_DELDOOR            2       /* User event delivery via doors */
 350
 351 /*
 352  * Per channel subscriber data structure. Chained in a linked list to an
 353  * event channel and to a binding.
 354  */
 355 typedef struct chsubd {
 356         evch_dlelem_t   sd_link;        /* Links all subscribers of this ch. */
 357         struct chsubd   *sd_subnxt;     /* Links all subscr. for a binding */
 358         char            *sd_ident;      /* Subscriber identifier */
 359         evch_eventq_t   *sd_queue;      /* Event queue for this subscriber */
 360         evch_evqsub_t   *sd_msub;       /* Main event queue subscr. */
 361         char            *sd_classname;  /* Filter criteria */
 362         size_t          sd_clnsize;     /* Size of sd_classname buffer */
 363         evch_evqsub_t   *sd_ssub;       /* Subscriber queue subscr. */
 364         int             sd_type;        /* Type of event delivery */
 365         kerndlv_f       sd_callback;    /* Callback for kernel delivery */
 366         void            *sd_cbcookie;   /* Cookie for kernel delivery */
 367         door_handle_t   sd_door;        /* Door handle for user delivery */
 368         int             sd_active;      /* Subscription is in use indicator */
 369         pid_t           sd_pid;         /* PID of subscribing process */
 370         uint8_t         sd_persist;     /* Persistent user land subscription */
 371         uint8_t         sd_dump;        /* Dump with sysevent_evc_walk_* */
 372 } evch_subd_t;
 373
 374 /*
 375  * General purpose event channel descriptor structure. This is the main
 376  * structure for event subscribing, publishing, delivery to/from an event
 377  * channel.
 378  */
 379 typedef struct {
 380         evch_dlelem_t   ch_link;        /* Must be first elem. of structure */
 381         char            *ch_name;       /* Channel name */
 382         size_t          ch_namelen;     /* Length of channel name buffer */
 383         kmutex_t        ch_mutex;       /* To protect this structure */
 384         evch_eventq_t   *ch_queue;      /* Publisher event queue */
 385         evch_dlist_t    ch_subscr;      /* List of subscr. data (evch_subd_t) */
 386         uint32_t        ch_bindings;    /* No of bindings to this channel */
 387         int             ch_maxbinds;    /* Maximum number of binds */
 388         uid_t           ch_uid;         /* Creators effective user id */
 389         gid_t           ch_gid;         /* Creators effective group id */
 390         kmutex_t        ch_pubmx;       /* Mutex for ch_pubcv and ch_nevents */
 391         kcondvar_t      ch_pubcv;       /* To set publisher to sleep */
 392         uint32_t        ch_nevents;     /* Current number of events */
 393         uint32_t        ch_maxev;       /* Maximum number of events */
 394         int             ch_maxsubscr;   /* Maximum number of subscriptions */
 395         int             ch_holdpend;    /* Hold pending events mode if != 0 */
 396         time_t          ch_ctime;       /* Channel creation time */
 397         nvlist_t        *ch_propnvl;    /* Channel properties nvlist */
 398         int64_t         ch_propnvlgen;  /* Properties generation number */
 399 } evch_chan_t;
 400
 401 /*
 402  * Channel binding structure. Allocated per binding to a channel. Protected
 403  * by locking the channel structure
 404  */
 405 typedef struct {
 406         evch_chan_t     *bd_channel;
 407         evch_subd_t     *bd_sublst;     /* chain of all subscriptions */
 408 } evch_bind_t;
 409
 410 /*
 411  * Structure to keep a snapshot of all events of a channel
 412  */
 413 typedef struct {
 414         evch_eventq_t   *sn_queue;      /* Event queue with snapshot of ev's */
 415         sysevent_impl_t *sn_nxtev;      /* Pointer to find next event */
 416 } evchanq_t;
 417
 418 /* Project private interfaces */
 419 extern evchan_t *evch_usrchanopen(const char *name, uint32_t flags, int *err);
 420 extern void evch_usrchanclose(evchan_t *cbp);
 421 extern sysevent_impl_t *evch_usrallocev(size_t evsize, uint32_t flags);
 422 extern void evch_usrfreeev(sysevent_impl_t *ev);
 423 extern int evch_usrpostevent(evchan_t *bp, sysevent_impl_t *ev, uint32_t flags);
 424 extern int evch_usrsubscribe(evchan_t *bp, const char *sid, const char *class,
 425     int d, uint32_t flags);
 426 extern int evch_usrcontrol_set(evchan_t *bp, int cmd, uint32_t value);
 427 extern int evch_usrcontrol_get(evchan_t *bp, int cmd, uint32_t *value);
 428 extern void evch_usrunsubscribe(evchan_t *bp, const char *subid, uint32_t flag);
 429 extern int evch_usrgetchnames(char *buf, size_t size);
 430 extern int evch_usrgetchdata(char *chname, void *buf, size_t size);
 431 extern void evch_usrsetpropnvl(evchan_t *bp, nvlist_t *nvl);
 432 extern int evch_usrgetpropnvl(evchan_t *bp, nvlist_t **nvlp, int64_t *genp);
 433
 434 extern void sysevent_evc_init();
 435 extern void sysevent_evc_thrinit();
 436 extern evchanq_t *sysevent_evc_walk_init(evchan_t *, char *);
 437 extern sysevent_t *sysevent_evc_walk_step(evchanq_t *);
 438 extern void sysevent_evc_walk_fini(evchanq_t *);
 439 extern char *sysevent_evc_event_attr(sysevent_t *, size_t *);
 440
 441 #endif /* _KERNEL */
 442
 443 /*
 444  * Structures and limits to deliver channel data to syseventadm
 445  */
 446 #define EVCH_MAX_DATA_SIZE      (1024 * 1024)
 447
 448 typedef struct {
 449         uint32_t        sb_nextoff;     /* Offset to next subscr info struct */
 450         uint32_t        sb_stroff;      /* Offset to strings */
 451         uint32_t        sb_clnamoff;    /* Offset of class in sb_strings */
 452         uint32_t        sb_pid;         /* Subscriber process id */
 453         uint32_t        sb_nevents;     /* Current no of event in sub q */
 454         uint32_t        sb_evhwm;       /* High watermark of sub q */
 455         uint32_t        sb_persist;     /* != 0 if subscription persists */
 456         uint32_t        sb_status;      /* != 0 if subscription is inactive */
 457         uint32_t        sb_active;      /* > 0 if subscription is in use */
 458         uint32_t        sb_dump;        /* != 0 if sub will be dumped */
 459         char            sb_strings[1];  /* String space for subid and class */
 460 } sev_subinfo_t;
 461
 462 typedef struct {
 463         uint32_t        cd_version;     /* Version of this structure */
 464         uint32_t        cd_suboffs;     /* Offset of subscriber info struct */
 465         uint64_t        cd_ctime;       /* Creation time */
 466         uint32_t        cd_uid;         /* User id */
 467         uint32_t        cd_gid;         /* Owner group id */
 468         uint32_t        cd_perms;       /* Permission bits */
 469         uint32_t        cd_maxev;       /* Max number of events */
 470         uint32_t        cd_evhwm;       /* High watermark of main event queue */
 471         uint32_t        cd_nevents;     /* current no of events in main ev q */
 472         uint32_t        cd_maxsub;      /* Max number of subscriptions */
 473         uint32_t        cd_nsub;        /* Current number of subscriptions */
 474         uint32_t        cd_maxbinds;    /* Max number of binds */
 475         uint32_t        cd_nbinds;      /* Current number of binds */
 476         uint32_t        cd_holdpend;    /* != 0 when HOLDPEND mode is set */
 477         uint32_t        cd_limev;       /* Limit of events per channel */
 478         sev_subinfo_t   cd_subinfo[1];  /* Per subscriber data */
 479 } sev_chinfo_t;
 480
 481 /*
 482  * Project private flags for sysevent_evc_subscribe. Bits 0 to 7 are reserved
 483  * for the consolidation private interface, so we must use bits 8-15 here.
 484  */
 485 #define EVCH_SUB_DUMP           (0x01 << 8)
 486
 487 /*
 488  * Permission flags
 489  */
 490 #define EVCH_PUB                0x0004  /* wants to publish events */
 491 #define EVCH_SUB                0x0008  /* wants to subscribe to channel */
 492
 493 #define EVCH_SUBU               0x0001  /* Subscribing allowed for uid */
 494 #define EVCH_PUBU               0x0002  /* Publishing allowed for uid */
 495 #define EVCH_PSUSR              0x0003  /* EVCH_SUBU + EVCH_PUBU */
 496 #define EVCH_SUBG               0x0004  /* Subscribing allowed for gid */
 497 #define EVCH_PUBG               0x0008  /* Publishing allowed for gid */
 498 #define EVCH_PSGRP              0x000C  /* EVCH_SUBG + EVCH_PUBG */
 499 #define EVCH_SUBO               0x0010  /* Subscribing allowed to all users */
 500 #define EVCH_PUBO               0x0020  /* Publishing allowed to all users */
 501 #define EVCH_PSOTH              0x0030  /* EVCH_SUBO + EVCH_PUBO */
 502 #define EVCH_PSALL              0x003f  /* Mask of all permission bits */
 503
 504 /*
 505  * Sysevent driver ioctls
 506  */
 507 #define SEV_BASE                0x53455600
 508 #define SEV_PUBLISH             SEV_BASE | 0x01
 509 #define SEV_CHAN_OPEN           SEV_BASE | 0x02
 510 #define SEV_CHAN_CONTROL        SEV_BASE | 0x03
 511 #define SEV_SUBSCRIBE           SEV_BASE | 0x04
 512 #define SEV_UNSUBSCRIBE         SEV_BASE | 0x05
 513 #define SEV_CHANNAMES           SEV_BASE | 0x06
 514 #define SEV_CHANDATA            SEV_BASE | 0x07
 515 #define SEV_SETPROPNVL          SEV_BASE | 0x08
 516 #define SEV_GETPROPNVL          SEV_BASE | 0x09
 517
 518 #define DEVSYSEVENT     "/dev/sysevent"
 519 #define DEVICESYSEVENT  "/devices/pseudo/sysevent@0:sysevent"
 520
 521 /*
 522  * Maximum allowed binding handles
 523  * It's a limit required by bitmap algorithm design (see sys/bitmap.h).
 524  * Use pack(4) to make sizeof structs be the same on x86 and amd64.
 525  */
 526 #define SYSEVENT_MINOR_MAX      SHRT_MAX
 527
 528 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
 529 #pragma pack(4)
 530 #endif
 531
 532 /* copyin/copyout data */
 533 typedef struct box {
 534         uint64_t name;          /* pointer to something */
 535         uint32_t len;
 536 } sev_box_t;
 537
 538 typedef struct bind_args {
 539         sev_box_t chan_name;
 540         uint32_t flags;
 541 } sev_bind_args_t;
 542
 543 typedef struct control_args {
 544         uint32_t cmd;
 545         uint32_t value;
 546 } sev_control_args_t;
 547
 548 typedef struct publish_args {
 549         sev_box_t ev;
 550         uint32_t flags;
 551 } sev_publish_args_t;
 552
 553 typedef struct subscribe_args {
 554         sev_box_t sid;
 555         sev_box_t class_info;
 556         int door_desc;
 557         uint32_t flags;
 558 } sev_subscribe_args_t;
 559
 560 typedef struct unsubscribe_args {
 561         sev_box_t sid;
 562 } sev_unsubscribe_args_t;
 563
 564 typedef struct chandata {
 565         sev_box_t in_data;
 566         sev_box_t out_data;
 567 } sev_chandata_args_t;
 568
 569 typedef struct propnvl_args {
 570         sev_box_t packednvl;    /* input and output */
 571         int64_t generation;     /* output on get operation */
 572 } sev_propnvl_args_t;
 573
 574 #if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
 575 #pragma pack()
 576 #endif
 577
 578 #ifdef  __cplusplus
 579 }
 580 #endif
 581
 582 #endif  /* _SYS_SYSEVENT_IMPL_H */