2 * Copyright (C) 2016, 2017 "IoT.bzh"
3 * Author José Bollo <jose.bollo@iot.bzh>
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
29 #include <json-c/json.h>
31 #include <afb/afb-req-common.h>
32 #include <afb/afb-event-itf.h>
34 #include "afb-context.h"
36 #include "afb-session.h"
39 #include "afb-export.h"
44 * Definition of a hook for xreq
46 struct afb_hook_xreq {
47 struct afb_hook_xreq *next; /**< next hook */
48 unsigned refcount; /**< reference count */
49 char *api; /**< api hooked or NULL for any */
50 char *verb; /**< verb hooked or NULL for any */
51 struct afb_session *session; /**< session hooked or NULL if any */
52 unsigned flags; /**< hook flags */
53 struct afb_hook_xreq_itf *itf; /**< interface of hook */
54 void *closure; /**< closure for callbacks */
58 * Definition of a hook for export
60 struct afb_hook_ditf {
61 struct afb_hook_ditf *next; /**< next hook */
62 unsigned refcount; /**< reference count */
63 char *api; /**< api hooked or NULL for any */
64 unsigned flags; /**< hook flags */
65 struct afb_hook_ditf_itf *itf; /**< interface of hook */
66 void *closure; /**< closure for callbacks */
70 * Definition of a hook for export
73 struct afb_hook_svc *next; /**< next hook */
74 unsigned refcount; /**< reference count */
75 char *api; /**< api hooked or NULL for any */
76 unsigned flags; /**< hook flags */
77 struct afb_hook_svc_itf *itf; /**< interface of hook */
78 void *closure; /**< closure for callbacks */
82 * Definition of a hook for evt
85 struct afb_hook_evt *next; /**< next hook */
86 unsigned refcount; /**< reference count */
87 char *pattern; /**< event pattern name hooked or NULL for any */
88 unsigned flags; /**< hook flags */
89 struct afb_hook_evt_itf *itf; /**< interface of hook */
90 void *closure; /**< closure for callbacks */
94 * Definition of a hook for global
96 struct afb_hook_global {
97 struct afb_hook_global *next; /**< next hook */
98 unsigned refcount; /**< reference count */
99 unsigned flags; /**< hook flags */
100 struct afb_hook_global_itf *itf; /**< interface of hook */
101 void *closure; /**< closure for callbacks */
104 /* synchronisation across threads */
105 static pthread_rwlock_t rwlock = PTHREAD_RWLOCK_INITIALIZER;
107 /* list of hooks for xreq */
108 static struct afb_hook_xreq *list_of_xreq_hooks = NULL;
110 /* list of hooks for export */
111 static struct afb_hook_ditf *list_of_ditf_hooks = NULL;
113 /* list of hooks for export */
114 static struct afb_hook_svc *list_of_svc_hooks = NULL;
116 /* list of hooks for evt */
117 static struct afb_hook_evt *list_of_evt_hooks = NULL;
119 /* list of hooks for global */
120 static struct afb_hook_global *list_of_global_hooks = NULL;
123 static unsigned next_hookid = 0;
125 /******************************************************************************
127 *****************************************************************************/
128 static void init_hookid(struct afb_hookid *hookid)
130 hookid->id = __atomic_add_fetch(&next_hookid, 1, __ATOMIC_RELAXED);
131 clock_gettime(CLOCK_MONOTONIC, &hookid->time);
134 /******************************************************************************
135 * section: default callbacks for tracing requests
136 *****************************************************************************/
138 static char *_pbuf_(const char *fmt, va_list args, char **palloc, char *sbuf, size_t szsbuf, size_t *outlen)
145 rc = vsnprintf(sbuf, szsbuf, fmt, args);
146 if ((size_t)rc >= szsbuf) {
148 sbuf[szsbuf-2] = sbuf[szsbuf-3] = sbuf[szsbuf-4] = '.';
149 rc = vasprintf(palloc, fmt, cp);
154 if (rc >= 0 && outlen)
155 *outlen = (size_t)rc;
159 #if 0 /* old behaviour: use NOTICE */
160 static void _hook_(const char *fmt1, const char *fmt2, va_list arg2, ...)
162 char *tag, *data, *mem1, *mem2, buf1[256], buf2[2000];
165 data = _pbuf_(fmt2, arg2, &mem2, buf2, sizeof buf2, NULL);
167 va_start(arg1, arg2);
168 tag = _pbuf_(fmt1, arg1, &mem1, buf1, sizeof buf1, NULL);
171 NOTICE("[HOOK %s] %s", tag, data);
176 #else /* new behaviour: emits directly to stderr */
177 static void _hook_(const char *fmt1, const char *fmt2, va_list arg2, ...)
179 static const char chars[] = "HOOK: [] \n";
180 char *mem1, *mem2, buf1[256], buf2[2000];
184 iov[0].iov_base = (void*)&chars[0];
187 va_start(arg1, arg2);
188 iov[1].iov_base = _pbuf_(fmt1, arg1, &mem1, buf1, sizeof buf1, &iov[1].iov_len);
191 iov[2].iov_base = (void*)&chars[7];
194 iov[3].iov_base = _pbuf_(fmt2, arg2, &mem2, buf2, sizeof buf2, &iov[3].iov_len);
196 iov[4].iov_base = (void*)&chars[9];
206 static void _hook_xreq_(const struct afb_xreq *xreq, const char *format, ...)
209 va_start(ap, format);
210 _hook_("xreq-%06d:%s/%s", format, ap, xreq->hookindex, xreq->api, xreq->verb);
214 static void hook_xreq_begin_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
217 _hook_xreq_(xreq, "BEGIN");
219 _hook_xreq_(xreq, "BEGIN uid=%d=%s gid=%d pid=%d label=%s id=%s",
220 (int)xreq->cred->uid,
222 (int)xreq->cred->gid,
223 (int)xreq->cred->pid,
224 xreq->cred->label?:"(null)",
225 xreq->cred->id?:"(null)"
229 static void hook_xreq_end_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
231 _hook_xreq_(xreq, "END");
234 static void hook_xreq_json_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct json_object *obj)
236 _hook_xreq_(xreq, "json() -> %s", json_object_to_json_string(obj));
239 static void hook_xreq_get_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *name, struct afb_arg arg)
241 _hook_xreq_(xreq, "get(%s) -> { name: %s, value: %s, path: %s }", name, arg.name, arg.value, arg.path);
244 static void hook_xreq_success_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct json_object *obj, const char *info)
246 _hook_xreq_(xreq, "success(%s, %s)", json_object_to_json_string(obj), info);
249 static void hook_xreq_fail_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *status, const char *info)
251 _hook_xreq_(xreq, "fail(%s, %s)", status, info);
254 static void hook_xreq_context_get_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, void *value)
256 _hook_xreq_(xreq, "context_get() -> %p", value);
259 static void hook_xreq_context_set_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, void *value, void (*free_value)(void*))
261 _hook_xreq_(xreq, "context_set(%p, %p)", value, free_value);
264 static void hook_xreq_addref_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
266 _hook_xreq_(xreq, "addref()");
269 static void hook_xreq_unref_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
271 _hook_xreq_(xreq, "unref()");
274 static void hook_xreq_session_close_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
276 _hook_xreq_(xreq, "session_close()");
279 static void hook_xreq_session_set_LOA_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, unsigned level, int result)
281 _hook_xreq_(xreq, "session_set_LOA(%u) -> %d", level, result);
284 static void hook_xreq_subscribe_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_event event, int result)
286 _hook_xreq_(xreq, "subscribe(%s:%d) -> %d", afb_evt_event_fullname(event), afb_evt_event_id(event), result);
289 static void hook_xreq_unsubscribe_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_event event, int result)
291 _hook_xreq_(xreq, "unsubscribe(%s:%d) -> %d", afb_evt_event_fullname(event), afb_evt_event_id(event), result);
294 static void hook_xreq_subcall_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
296 _hook_xreq_(xreq, "subcall(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
299 static void hook_xreq_subcall_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
301 _hook_xreq_(xreq, " ...subcall... -> %d: %s", status, json_object_to_json_string(result));
304 static void hook_xreq_subcallsync_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
306 _hook_xreq_(xreq, "subcallsync(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
309 static void hook_xreq_subcallsync_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
311 _hook_xreq_(xreq, " ...subcallsync... -> %d: %s", status, json_object_to_json_string(result));
314 static void hook_xreq_vverbose_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
321 len = vasprintf(&msg, fmt, ap);
325 _hook_xreq_(xreq, "vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, func, fmt);
327 _hook_xreq_(xreq, "vverbose(%d, %s, %d, %s) -> %s", level, file, line, func, msg);
332 static void hook_xreq_store_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_stored_req *sreq)
334 _hook_xreq_(xreq, "store() -> %p", sreq);
337 static void hook_xreq_unstore_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq)
339 _hook_xreq_(xreq, "unstore()");
342 static void hook_xreq_subcall_req_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
344 _hook_xreq_(xreq, "subcall_req(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
347 static void hook_xreq_subcall_req_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int status, struct json_object *result)
349 _hook_xreq_(xreq, " ...subcall_req... -> %d: %s", status, json_object_to_json_string(result));
352 static void hook_xreq_has_permission_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, const char *permission, int result)
354 _hook_xreq_(xreq, "has_permission(%s) -> %d", permission, result);
357 static void hook_xreq_get_application_id_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, char *result)
359 _hook_xreq_(xreq, "get_application_id() -> %s", result);
362 static void hook_xreq_context_make_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, int replace, void *(*create_value)(void*), void (*free_value)(void*), void *create_closure, void *result)
364 _hook_xreq_(xreq, "context_make(replace=%s, %p, %p, %p) -> %p", replace?"yes":"no", create_value, free_value, create_closure, result);
367 static struct afb_hook_xreq_itf hook_xreq_default_itf = {
368 .hook_xreq_begin = hook_xreq_begin_default_cb,
369 .hook_xreq_end = hook_xreq_end_default_cb,
370 .hook_xreq_json = hook_xreq_json_default_cb,
371 .hook_xreq_get = hook_xreq_get_default_cb,
372 .hook_xreq_success = hook_xreq_success_default_cb,
373 .hook_xreq_fail = hook_xreq_fail_default_cb,
374 .hook_xreq_context_get = hook_xreq_context_get_default_cb,
375 .hook_xreq_context_set = hook_xreq_context_set_default_cb,
376 .hook_xreq_addref = hook_xreq_addref_default_cb,
377 .hook_xreq_unref = hook_xreq_unref_default_cb,
378 .hook_xreq_session_close = hook_xreq_session_close_default_cb,
379 .hook_xreq_session_set_LOA = hook_xreq_session_set_LOA_default_cb,
380 .hook_xreq_subscribe = hook_xreq_subscribe_default_cb,
381 .hook_xreq_unsubscribe = hook_xreq_unsubscribe_default_cb,
382 .hook_xreq_subcall = hook_xreq_subcall_default_cb,
383 .hook_xreq_subcall_result = hook_xreq_subcall_result_default_cb,
384 .hook_xreq_subcallsync = hook_xreq_subcallsync_default_cb,
385 .hook_xreq_subcallsync_result = hook_xreq_subcallsync_result_default_cb,
386 .hook_xreq_vverbose = hook_xreq_vverbose_default_cb,
387 .hook_xreq_store = hook_xreq_store_default_cb,
388 .hook_xreq_unstore = hook_xreq_unstore_default_cb,
389 .hook_xreq_subcall_req = hook_xreq_subcall_req_default_cb,
390 .hook_xreq_subcall_req_result = hook_xreq_subcall_req_result_default_cb,
391 .hook_xreq_has_permission = hook_xreq_has_permission_default_cb,
392 .hook_xreq_get_application_id = hook_xreq_get_application_id_default_cb,
393 .hook_xreq_context_make = hook_xreq_context_make_default_cb
396 /******************************************************************************
397 * section: hooks for tracing requests
398 *****************************************************************************/
400 #define _HOOK_XREQ_(what,...) \
401 struct afb_hook_xreq *hook; \
402 struct afb_hookid hookid; \
403 pthread_rwlock_rdlock(&rwlock); \
404 init_hookid(&hookid); \
405 hook = list_of_xreq_hooks; \
407 if (hook->itf->hook_xreq_##what \
408 && (hook->flags & afb_hook_flag_req_##what) != 0 \
409 && (!hook->session || hook->session == xreq->context.session) \
410 && (!hook->api || !strcasecmp(hook->api, xreq->api)) \
411 && (!hook->verb || !strcasecmp(hook->verb, xreq->verb))) { \
412 hook->itf->hook_xreq_##what(hook->closure, &hookid, __VA_ARGS__); \
416 pthread_rwlock_unlock(&rwlock);
419 void afb_hook_xreq_begin(const struct afb_xreq *xreq)
421 _HOOK_XREQ_(begin, xreq);
424 void afb_hook_xreq_end(const struct afb_xreq *xreq)
426 _HOOK_XREQ_(end, xreq);
429 struct json_object *afb_hook_xreq_json(const struct afb_xreq *xreq, struct json_object *obj)
431 _HOOK_XREQ_(json, xreq, obj);
435 struct afb_arg afb_hook_xreq_get(const struct afb_xreq *xreq, const char *name, struct afb_arg arg)
437 _HOOK_XREQ_(get, xreq, name, arg);
441 void afb_hook_xreq_success(const struct afb_xreq *xreq, struct json_object *obj, const char *info)
443 _HOOK_XREQ_(success, xreq, obj, info);
446 void afb_hook_xreq_fail(const struct afb_xreq *xreq, const char *status, const char *info)
448 _HOOK_XREQ_(fail, xreq, status, info);
451 void *afb_hook_xreq_context_get(const struct afb_xreq *xreq, void *value)
453 _HOOK_XREQ_(context_get, xreq, value);
457 void afb_hook_xreq_context_set(const struct afb_xreq *xreq, void *value, void (*free_value)(void*))
459 _HOOK_XREQ_(context_set, xreq, value, free_value);
462 void afb_hook_xreq_addref(const struct afb_xreq *xreq)
464 _HOOK_XREQ_(addref, xreq);
467 void afb_hook_xreq_unref(const struct afb_xreq *xreq)
469 _HOOK_XREQ_(unref, xreq);
472 void afb_hook_xreq_session_close(const struct afb_xreq *xreq)
474 _HOOK_XREQ_(session_close, xreq);
477 int afb_hook_xreq_session_set_LOA(const struct afb_xreq *xreq, unsigned level, int result)
479 _HOOK_XREQ_(session_set_LOA, xreq, level, result);
483 int afb_hook_xreq_subscribe(const struct afb_xreq *xreq, struct afb_event event, int result)
485 _HOOK_XREQ_(subscribe, xreq, event, result);
489 int afb_hook_xreq_unsubscribe(const struct afb_xreq *xreq, struct afb_event event, int result)
491 _HOOK_XREQ_(unsubscribe, xreq, event, result);
495 void afb_hook_xreq_subcall(const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
497 _HOOK_XREQ_(subcall, xreq, api, verb, args);
500 void afb_hook_xreq_subcall_result(const struct afb_xreq *xreq, int status, struct json_object *result)
502 _HOOK_XREQ_(subcall_result, xreq, status, result);
505 void afb_hook_xreq_subcallsync(const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
507 _HOOK_XREQ_(subcallsync, xreq, api, verb, args);
510 int afb_hook_xreq_subcallsync_result(const struct afb_xreq *xreq, int status, struct json_object *result)
512 _HOOK_XREQ_(subcallsync_result, xreq, status, result);
516 void afb_hook_xreq_vverbose(const struct afb_xreq *xreq, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
518 _HOOK_XREQ_(vverbose, xreq, level, file ?: "?", line, func ?: "?", fmt, args);
521 void afb_hook_xreq_store(const struct afb_xreq *xreq, struct afb_stored_req *sreq)
523 _HOOK_XREQ_(store, xreq, sreq);
526 void afb_hook_xreq_unstore(const struct afb_xreq *xreq)
528 _HOOK_XREQ_(unstore, xreq);
531 void afb_hook_xreq_subcall_req(const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args)
533 _HOOK_XREQ_(subcall_req, xreq, api, verb, args);
536 void afb_hook_xreq_subcall_req_result(const struct afb_xreq *xreq, int status, struct json_object *result)
538 _HOOK_XREQ_(subcall_req_result, xreq, status, result);
541 int afb_hook_xreq_has_permission(const struct afb_xreq *xreq, const char *permission, int result)
543 _HOOK_XREQ_(has_permission, xreq, permission, result);
547 char *afb_hook_xreq_get_application_id(const struct afb_xreq *xreq, char *result)
549 _HOOK_XREQ_(get_application_id, xreq, result);
553 void *afb_hook_xreq_context_make(const struct afb_xreq *xreq, int replace, void *(*create_value)(void*), void (*free_value)(void*), void *create_closure, void *result)
555 _HOOK_XREQ_(context_make, xreq, replace, create_value, free_value, create_closure, result);
559 /******************************************************************************
560 * section: hooking xreqs
561 *****************************************************************************/
563 void afb_hook_init_xreq(struct afb_xreq *xreq)
569 struct afb_hook_xreq *hook;
571 /* scan hook list to get the expected flags */
573 pthread_rwlock_rdlock(&rwlock);
574 hook = list_of_xreq_hooks;
576 f = hook->flags & afb_hook_flags_req_all;
578 && (!hook->session || hook->session == xreq->context.session)
579 && (!hook->api || !strcasecmp(hook->api, xreq->api))
580 && (!hook->verb || !strcasecmp(hook->verb, xreq->verb));
585 pthread_rwlock_unlock(&rwlock);
587 /* store the hooking data */
588 xreq->hookflags = flags;
590 pthread_rwlock_wrlock(&rwlock);
593 xreq->hookindex = reqindex;
594 pthread_rwlock_unlock(&rwlock);
598 struct afb_hook_xreq *afb_hook_create_xreq(const char *api, const char *verb, struct afb_session *session, int flags, struct afb_hook_xreq_itf *itf, void *closure)
600 struct afb_hook_xreq *hook;
602 /* alloc the result */
603 hook = calloc(1, sizeof *hook);
607 /* get a copy of the names */
608 hook->api = api ? strdup(api) : NULL;
609 hook->verb = verb ? strdup(verb) : NULL;
610 if ((api && !hook->api) || (verb && !hook->verb)) {
617 /* initialise the rest */
618 hook->session = session;
620 afb_session_addref(session);
623 hook->itf = itf ? itf : &hook_xreq_default_itf;
624 hook->closure = closure;
626 /* record the hook */
627 pthread_rwlock_wrlock(&rwlock);
628 hook->next = list_of_xreq_hooks;
629 list_of_xreq_hooks = hook;
630 pthread_rwlock_unlock(&rwlock);
636 struct afb_hook_xreq *afb_hook_addref_xreq(struct afb_hook_xreq *hook)
638 pthread_rwlock_wrlock(&rwlock);
640 pthread_rwlock_unlock(&rwlock);
644 void afb_hook_unref_xreq(struct afb_hook_xreq *hook)
646 struct afb_hook_xreq **prv;
649 pthread_rwlock_wrlock(&rwlock);
650 if (--hook->refcount)
654 prv = &list_of_xreq_hooks;
655 while (*prv && *prv != hook)
660 pthread_rwlock_unlock(&rwlock);
666 afb_session_unref(hook->session);
672 /******************************************************************************
673 * section: default callbacks for tracing daemon interface
674 *****************************************************************************/
676 static void _hook_ditf_(const struct afb_export *export, const char *format, ...)
679 va_start(ap, format);
680 _hook_("export-%s", format, ap, afb_export_apiname(export));
684 static void hook_ditf_event_broadcast_before_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct json_object *object)
686 _hook_ditf_(export, "event_broadcast.before(%s, %s)....", name, json_object_to_json_string(object));
689 static void hook_ditf_event_broadcast_after_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct json_object *object, int result)
691 _hook_ditf_(export, "event_broadcast.after(%s, %s) -> %d", name, json_object_to_json_string(object), result);
694 static void hook_ditf_get_event_loop_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_event *result)
696 _hook_ditf_(export, "get_event_loop() -> %p", result);
699 static void hook_ditf_get_user_bus_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_bus *result)
701 _hook_ditf_(export, "get_user_bus() -> %p", result);
704 static void hook_ditf_get_system_bus_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_bus *result)
706 _hook_ditf_(export, "get_system_bus() -> %p", result);
709 static void hook_ditf_vverbose_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
716 len = vasprintf(&msg, fmt, ap);
720 _hook_ditf_(export, "vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, function, fmt);
722 _hook_ditf_(export, "vverbose(%d, %s, %d, %s) -> %s", level, file, line, function, msg);
727 static void hook_ditf_event_make_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, struct afb_event result)
729 _hook_ditf_(export, "event_make(%s) -> %s:%d", name, afb_evt_event_fullname(result), afb_evt_event_id(result));
732 static void hook_ditf_rootdir_get_fd_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result)
736 _hook_ditf_(export, "rootdir_get_fd() -> %d, %m", result);
738 sprintf(path, "/proc/self/fd/%d", result);
739 readlink(path, path, sizeof path);
740 _hook_ditf_(export, "rootdir_get_fd() -> %d = %s", result, path);
744 static void hook_ditf_rootdir_open_locale_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *filename, int flags, const char *locale, int result)
750 _hook_ditf_(export, "rootdir_open_locale(%s, %d, %s) -> %d, %m", filename, flags, locale, result);
752 sprintf(path, "/proc/self/fd/%d", result);
753 readlink(path, path, sizeof path);
754 _hook_ditf_(export, "rootdir_open_locale(%s, %d, %s) -> %d = %s", filename, flags, locale, result, path);
758 static void hook_ditf_queue_job_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout, int result)
760 _hook_ditf_(export, "queue_job(%p, %p, %p, %d) -> %d", callback, argument, group, timeout, result);
763 static void hook_ditf_unstore_req_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct afb_stored_req *sreq)
765 _hook_ditf_(export, "unstore_req(%p)", sreq);
768 static void hook_ditf_require_api_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, int initialized)
770 _hook_ditf_(export, "require_api(%s, %d)...", name, initialized);
773 static void hook_ditf_require_api_result_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, int initialized, int result)
775 _hook_ditf_(export, "...require_api(%s, %d) -> %d", name, initialized, result);
778 static void hook_ditf_rename_api_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *oldname, const char *newname, int result)
780 _hook_ditf_(export, "rename_api(%s -> %s) -> %d", oldname, newname, result);
783 static struct afb_hook_ditf_itf hook_ditf_default_itf = {
784 .hook_ditf_event_broadcast_before = hook_ditf_event_broadcast_before_cb,
785 .hook_ditf_event_broadcast_after = hook_ditf_event_broadcast_after_cb,
786 .hook_ditf_get_event_loop = hook_ditf_get_event_loop_cb,
787 .hook_ditf_get_user_bus = hook_ditf_get_user_bus_cb,
788 .hook_ditf_get_system_bus = hook_ditf_get_system_bus_cb,
789 .hook_ditf_vverbose = hook_ditf_vverbose_cb,
790 .hook_ditf_event_make = hook_ditf_event_make_cb,
791 .hook_ditf_rootdir_get_fd = hook_ditf_rootdir_get_fd_cb,
792 .hook_ditf_rootdir_open_locale = hook_ditf_rootdir_open_locale_cb,
793 .hook_ditf_queue_job = hook_ditf_queue_job_cb,
794 .hook_ditf_unstore_req = hook_ditf_unstore_req_cb,
795 .hook_ditf_require_api = hook_ditf_require_api_cb,
796 .hook_ditf_require_api_result = hook_ditf_require_api_result_cb,
797 .hook_ditf_rename_api = hook_ditf_rename_api_cb
800 /******************************************************************************
801 * section: hooks for tracing daemon interface (export)
802 *****************************************************************************/
804 #define _HOOK_DITF_(what,...) \
805 struct afb_hook_ditf *hook; \
806 struct afb_hookid hookid; \
807 const char *apiname = afb_export_apiname(export); \
808 pthread_rwlock_rdlock(&rwlock); \
809 init_hookid(&hookid); \
810 hook = list_of_ditf_hooks; \
812 if (hook->itf->hook_ditf_##what \
813 && (hook->flags & afb_hook_flag_ditf_##what) != 0 \
814 && (!hook->api || !strcasecmp(hook->api, apiname))) { \
815 hook->itf->hook_ditf_##what(hook->closure, &hookid, __VA_ARGS__); \
819 pthread_rwlock_unlock(&rwlock);
821 void afb_hook_ditf_event_broadcast_before(const struct afb_export *export, const char *name, struct json_object *object)
823 _HOOK_DITF_(event_broadcast_before, export, name, object);
826 int afb_hook_ditf_event_broadcast_after(const struct afb_export *export, const char *name, struct json_object *object, int result)
828 _HOOK_DITF_(event_broadcast_after, export, name, object, result);
832 struct sd_event *afb_hook_ditf_get_event_loop(const struct afb_export *export, struct sd_event *result)
834 _HOOK_DITF_(get_event_loop, export, result);
838 struct sd_bus *afb_hook_ditf_get_user_bus(const struct afb_export *export, struct sd_bus *result)
840 _HOOK_DITF_(get_user_bus, export, result);
844 struct sd_bus *afb_hook_ditf_get_system_bus(const struct afb_export *export, struct sd_bus *result)
846 _HOOK_DITF_(get_system_bus, export, result);
850 void afb_hook_ditf_vverbose(const struct afb_export *export, int level, const char *file, int line, const char *function, const char *fmt, va_list args)
852 _HOOK_DITF_(vverbose, export, level, file, line, function, fmt, args);
855 struct afb_event afb_hook_ditf_event_make(const struct afb_export *export, const char *name, struct afb_event result)
857 _HOOK_DITF_(event_make, export, name, result);
861 int afb_hook_ditf_rootdir_get_fd(const struct afb_export *export, int result)
863 _HOOK_DITF_(rootdir_get_fd, export, result);
867 int afb_hook_ditf_rootdir_open_locale(const struct afb_export *export, const char *filename, int flags, const char *locale, int result)
869 _HOOK_DITF_(rootdir_open_locale, export, filename, flags, locale, result);
873 int afb_hook_ditf_queue_job(const struct afb_export *export, void (*callback)(int signum, void *arg), void *argument, void *group, int timeout, int result)
875 _HOOK_DITF_(queue_job, export, callback, argument, group, timeout, result);
879 void afb_hook_ditf_unstore_req(const struct afb_export *export, struct afb_stored_req *sreq)
881 _HOOK_DITF_(unstore_req, export, sreq);
884 void afb_hook_ditf_require_api(const struct afb_export *export, const char *name, int initialized)
886 _HOOK_DITF_(require_api, export, name, initialized);
889 int afb_hook_ditf_require_api_result(const struct afb_export *export, const char *name, int initialized, int result)
891 _HOOK_DITF_(require_api_result, export, name, initialized, result);
895 int afb_hook_ditf_rename_api(const struct afb_export *export, const char *oldname, const char *newname, int result)
897 _HOOK_DITF_(rename_api, export, oldname, newname, result);
901 /******************************************************************************
902 * section: hooking export
903 *****************************************************************************/
905 int afb_hook_flags_ditf(const char *api)
908 struct afb_hook_ditf *hook;
910 pthread_rwlock_rdlock(&rwlock);
912 hook = list_of_ditf_hooks;
914 if (!api || !hook->api || !strcasecmp(hook->api, api))
915 flags |= hook->flags;
918 pthread_rwlock_unlock(&rwlock);
922 struct afb_hook_ditf *afb_hook_create_ditf(const char *api, int flags, struct afb_hook_ditf_itf *itf, void *closure)
924 struct afb_hook_ditf *hook;
926 /* alloc the result */
927 hook = calloc(1, sizeof *hook);
931 /* get a copy of the names */
932 hook->api = api ? strdup(api) : NULL;
933 if (api && !hook->api) {
938 /* initialise the rest */
941 hook->itf = itf ? itf : &hook_ditf_default_itf;
942 hook->closure = closure;
944 /* record the hook */
945 pthread_rwlock_wrlock(&rwlock);
946 hook->next = list_of_ditf_hooks;
947 list_of_ditf_hooks = hook;
948 pthread_rwlock_unlock(&rwlock);
954 struct afb_hook_ditf *afb_hook_addref_ditf(struct afb_hook_ditf *hook)
956 pthread_rwlock_wrlock(&rwlock);
958 pthread_rwlock_unlock(&rwlock);
962 void afb_hook_unref_ditf(struct afb_hook_ditf *hook)
964 struct afb_hook_ditf **prv;
967 pthread_rwlock_wrlock(&rwlock);
968 if (--hook->refcount)
972 prv = &list_of_ditf_hooks;
973 while (*prv && *prv != hook)
978 pthread_rwlock_unlock(&rwlock);
987 /******************************************************************************
988 * section: default callbacks for tracing service interface (export)
989 *****************************************************************************/
991 static void _hook_svc_(const struct afb_export *export, const char *format, ...)
994 va_start(ap, format);
995 _hook_("export-%s", format, ap, afb_export_apiname(export));
999 static void hook_svc_start_before_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export)
1001 _hook_svc_(export, "start.before");
1004 static void hook_svc_start_after_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status)
1006 _hook_svc_(export, "start.after -> %d", status);
1009 static void hook_svc_on_event_before_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *event, int eventid, struct json_object *object)
1011 _hook_svc_(export, "on_event.before(%s, %d, %s)", event, eventid, json_object_to_json_string(object));
1014 static void hook_svc_on_event_after_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *event, int eventid, struct json_object *object)
1016 _hook_svc_(export, "on_event.after(%s, %d, %s)", event, eventid, json_object_to_json_string(object));
1019 static void hook_svc_call_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
1021 _hook_svc_(export, "call(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
1024 static void hook_svc_call_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status, struct json_object *result)
1026 _hook_svc_(export, " ...call... -> %d: %s", status, json_object_to_json_string(result));
1029 static void hook_svc_callsync_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
1031 _hook_svc_(export, "callsync(%s/%s, %s) ...", api, verb, json_object_to_json_string(args));
1034 static void hook_svc_callsync_result_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status, struct json_object *result)
1036 _hook_svc_(export, " ...callsync... -> %d: %s", status, json_object_to_json_string(result));
1039 static struct afb_hook_svc_itf hook_svc_default_itf = {
1040 .hook_svc_start_before = hook_svc_start_before_default_cb,
1041 .hook_svc_start_after = hook_svc_start_after_default_cb,
1042 .hook_svc_on_event_before = hook_svc_on_event_before_default_cb,
1043 .hook_svc_on_event_after = hook_svc_on_event_after_default_cb,
1044 .hook_svc_call = hook_svc_call_default_cb,
1045 .hook_svc_call_result = hook_svc_call_result_default_cb,
1046 .hook_svc_callsync = hook_svc_callsync_default_cb,
1047 .hook_svc_callsync_result = hook_svc_callsync_result_default_cb
1050 /******************************************************************************
1051 * section: hooks for tracing service interface (export)
1052 *****************************************************************************/
1054 #define _HOOK_SVC_(what,...) \
1055 struct afb_hook_svc *hook; \
1056 struct afb_hookid hookid; \
1057 const char *apiname = afb_export_apiname(export); \
1058 pthread_rwlock_rdlock(&rwlock); \
1059 init_hookid(&hookid); \
1060 hook = list_of_svc_hooks; \
1062 if (hook->itf->hook_svc_##what \
1063 && (hook->flags & afb_hook_flag_svc_##what) != 0 \
1064 && (!hook->api || !strcasecmp(hook->api, apiname))) { \
1065 hook->itf->hook_svc_##what(hook->closure, &hookid, __VA_ARGS__); \
1067 hook = hook->next; \
1069 pthread_rwlock_unlock(&rwlock);
1071 void afb_hook_svc_start_before(const struct afb_export *export)
1073 _HOOK_SVC_(start_before, export);
1076 int afb_hook_svc_start_after(const struct afb_export *export, int status)
1078 _HOOK_SVC_(start_after, export, status);
1082 void afb_hook_svc_on_event_before(const struct afb_export *export, const char *event, int eventid, struct json_object *object)
1084 _HOOK_SVC_(on_event_before, export, event, eventid, object);
1087 void afb_hook_svc_on_event_after(const struct afb_export *export, const char *event, int eventid, struct json_object *object)
1089 _HOOK_SVC_(on_event_after, export, event, eventid, object);
1092 void afb_hook_svc_call(const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
1094 _HOOK_SVC_(call, export, api, verb, args);
1097 void afb_hook_svc_call_result(const struct afb_export *export, int status, struct json_object *result)
1099 _HOOK_SVC_(call_result, export, status, result);
1102 void afb_hook_svc_callsync(const struct afb_export *export, const char *api, const char *verb, struct json_object *args)
1104 _HOOK_SVC_(callsync, export, api, verb, args);
1107 int afb_hook_svc_callsync_result(const struct afb_export *export, int status, struct json_object *result)
1109 _HOOK_SVC_(callsync_result, export, status, result);
1113 /******************************************************************************
1114 * section: hooking services (export)
1115 *****************************************************************************/
1117 int afb_hook_flags_svc(const char *api)
1120 struct afb_hook_svc *hook;
1122 pthread_rwlock_rdlock(&rwlock);
1124 hook = list_of_svc_hooks;
1126 if (!api || !hook->api || !strcasecmp(hook->api, api))
1127 flags |= hook->flags;
1130 pthread_rwlock_unlock(&rwlock);
1134 struct afb_hook_svc *afb_hook_create_svc(const char *api, int flags, struct afb_hook_svc_itf *itf, void *closure)
1136 struct afb_hook_svc *hook;
1138 /* alloc the result */
1139 hook = calloc(1, sizeof *hook);
1143 /* get a copy of the names */
1144 hook->api = api ? strdup(api) : NULL;
1145 if (api && !hook->api) {
1150 /* initialise the rest */
1152 hook->flags = flags;
1153 hook->itf = itf ? itf : &hook_svc_default_itf;
1154 hook->closure = closure;
1156 /* record the hook */
1157 pthread_rwlock_wrlock(&rwlock);
1158 hook->next = list_of_svc_hooks;
1159 list_of_svc_hooks = hook;
1160 pthread_rwlock_unlock(&rwlock);
1166 struct afb_hook_svc *afb_hook_addref_svc(struct afb_hook_svc *hook)
1168 pthread_rwlock_wrlock(&rwlock);
1170 pthread_rwlock_unlock(&rwlock);
1174 void afb_hook_unref_svc(struct afb_hook_svc *hook)
1176 struct afb_hook_svc **prv;
1179 pthread_rwlock_wrlock(&rwlock);
1180 if (--hook->refcount)
1184 prv = &list_of_svc_hooks;
1185 while (*prv && *prv != hook)
1186 prv = &(*prv)->next;
1190 pthread_rwlock_unlock(&rwlock);
1199 /******************************************************************************
1200 * section: default callbacks for tracing service interface (evt)
1201 *****************************************************************************/
1203 static void _hook_evt_(const char *evt, int id, const char *format, ...)
1206 va_start(ap, format);
1207 _hook_("evt-%s:%d", format, ap, evt, id);
1211 static void hook_evt_create_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
1213 _hook_evt_(evt, id, "create");
1216 static void hook_evt_push_before_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj)
1218 _hook_evt_(evt, id, "push.before(%s)", json_object_to_json_string(obj));
1222 static void hook_evt_push_after_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj, int result)
1224 _hook_evt_(evt, id, "push.after(%s) -> %d", json_object_to_json_string(obj), result);
1227 static void hook_evt_broadcast_before_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj)
1229 _hook_evt_(evt, id, "broadcast.before(%s)", json_object_to_json_string(obj));
1232 static void hook_evt_broadcast_after_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj, int result)
1234 _hook_evt_(evt, id, "broadcast.after(%s) -> %d", json_object_to_json_string(obj), result);
1237 static void hook_evt_name_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, const char *result)
1239 _hook_evt_(evt, id, "name -> %s", result);
1242 static void hook_evt_addref_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
1244 _hook_evt_(evt, id, "addref");
1247 static void hook_evt_unref_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id)
1249 _hook_evt_(evt, id, "unref");
1252 static struct afb_hook_evt_itf hook_evt_default_itf = {
1253 .hook_evt_create = hook_evt_create_default_cb,
1254 .hook_evt_push_before = hook_evt_push_before_default_cb,
1255 .hook_evt_push_after = hook_evt_push_after_default_cb,
1256 .hook_evt_broadcast_before = hook_evt_broadcast_before_default_cb,
1257 .hook_evt_broadcast_after = hook_evt_broadcast_after_default_cb,
1258 .hook_evt_name = hook_evt_name_default_cb,
1259 .hook_evt_addref = hook_evt_addref_default_cb,
1260 .hook_evt_unref = hook_evt_unref_default_cb
1263 /******************************************************************************
1264 * section: hooks for tracing events interface (evt)
1265 *****************************************************************************/
1267 #define _HOOK_EVT_(what,...) \
1268 struct afb_hook_evt *hook; \
1269 struct afb_hookid hookid; \
1270 pthread_rwlock_rdlock(&rwlock); \
1271 init_hookid(&hookid); \
1272 hook = list_of_evt_hooks; \
1274 if (hook->itf->hook_evt_##what \
1275 && (hook->flags & afb_hook_flag_evt_##what) != 0 \
1276 && (!hook->pattern || !fnmatch(hook->pattern, evt, FNM_CASEFOLD))) { \
1277 hook->itf->hook_evt_##what(hook->closure, &hookid, __VA_ARGS__); \
1279 hook = hook->next; \
1281 pthread_rwlock_unlock(&rwlock);
1283 void afb_hook_evt_create(const char *evt, int id)
1285 _HOOK_EVT_(create, evt, id);
1288 void afb_hook_evt_push_before(const char *evt, int id, struct json_object *obj)
1290 _HOOK_EVT_(push_before, evt, id, obj);
1293 int afb_hook_evt_push_after(const char *evt, int id, struct json_object *obj, int result)
1295 _HOOK_EVT_(push_after, evt, id, obj, result);
1299 void afb_hook_evt_broadcast_before(const char *evt, int id, struct json_object *obj)
1301 _HOOK_EVT_(broadcast_before, evt, id, obj);
1304 int afb_hook_evt_broadcast_after(const char *evt, int id, struct json_object *obj, int result)
1306 _HOOK_EVT_(broadcast_after, evt, id, obj, result);
1310 void afb_hook_evt_name(const char *evt, int id, const char *result)
1312 _HOOK_EVT_(name, evt, id, result);
1315 void afb_hook_evt_addref(const char *evt, int id)
1317 _HOOK_EVT_(addref, evt, id);
1320 void afb_hook_evt_unref(const char *evt, int id)
1322 _HOOK_EVT_(unref, evt, id);
1325 /******************************************************************************
1326 * section: hooking services (evt)
1327 *****************************************************************************/
1329 int afb_hook_flags_evt(const char *name)
1332 struct afb_hook_evt *hook;
1334 pthread_rwlock_rdlock(&rwlock);
1336 hook = list_of_evt_hooks;
1338 if (!name || !hook->pattern || !fnmatch(hook->pattern, name, FNM_CASEFOLD))
1339 flags |= hook->flags;
1342 pthread_rwlock_unlock(&rwlock);
1346 struct afb_hook_evt *afb_hook_create_evt(const char *pattern, int flags, struct afb_hook_evt_itf *itf, void *closure)
1348 struct afb_hook_evt *hook;
1350 /* alloc the result */
1351 hook = calloc(1, sizeof *hook);
1355 /* get a copy of the names */
1356 hook->pattern = pattern ? strdup(pattern) : NULL;
1357 if (pattern && !hook->pattern) {
1362 /* initialise the rest */
1364 hook->flags = flags;
1365 hook->itf = itf ? itf : &hook_evt_default_itf;
1366 hook->closure = closure;
1368 /* record the hook */
1369 pthread_rwlock_wrlock(&rwlock);
1370 hook->next = list_of_evt_hooks;
1371 list_of_evt_hooks = hook;
1372 pthread_rwlock_unlock(&rwlock);
1378 struct afb_hook_evt *afb_hook_addref_evt(struct afb_hook_evt *hook)
1380 pthread_rwlock_wrlock(&rwlock);
1382 pthread_rwlock_unlock(&rwlock);
1386 void afb_hook_unref_evt(struct afb_hook_evt *hook)
1388 struct afb_hook_evt **prv;
1391 pthread_rwlock_wrlock(&rwlock);
1392 if (--hook->refcount)
1396 prv = &list_of_evt_hooks;
1397 while (*prv && *prv != hook)
1398 prv = &(*prv)->next;
1402 pthread_rwlock_unlock(&rwlock);
1405 free(hook->pattern);
1411 /******************************************************************************
1412 * section: default callbacks for globals (global)
1413 *****************************************************************************/
1415 static void _hook_global_(const char *format, ...)
1418 va_start(ap, format);
1419 _hook_("global", format, ap);
1423 static void hook_global_vverbose_default_cb(void *closure, const struct afb_hookid *hookid, int level, const char *file, int line, const char *func, const char *fmt, va_list args)
1430 len = vasprintf(&msg, fmt, ap);
1434 _hook_global_("vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, func, fmt);
1436 _hook_global_("vverbose(%d, %s, %d, %s) -> %s", level, file, line, func, msg);
1441 static struct afb_hook_global_itf hook_global_default_itf = {
1442 .hook_global_vverbose = hook_global_vverbose_default_cb
1445 /******************************************************************************
1446 * section: hooks for tracing globals (global)
1447 *****************************************************************************/
1449 #define _HOOK_GLOBAL_(what,...) \
1450 struct afb_hook_global *hook; \
1451 struct afb_hookid hookid; \
1452 pthread_rwlock_rdlock(&rwlock); \
1453 init_hookid(&hookid); \
1454 hook = list_of_global_hooks; \
1456 if (hook->itf->hook_global_##what \
1457 && (hook->flags & afb_hook_flag_global_##what) != 0) { \
1458 hook->itf->hook_global_##what(hook->closure, &hookid, __VA_ARGS__); \
1460 hook = hook->next; \
1462 pthread_rwlock_unlock(&rwlock);
1464 static void afb_hook_global_vverbose(int level, const char *file, int line, const char *func, const char *fmt, va_list args)
1466 _HOOK_GLOBAL_(vverbose, level, file ?: "?", line, func ?: "?", fmt ?: "", args);
1469 /******************************************************************************
1470 * section: hooking globals (global)
1471 *****************************************************************************/
1473 static void update_global()
1475 struct afb_hook_global *hook;
1478 pthread_rwlock_rdlock(&rwlock);
1479 hook = list_of_global_hooks;
1481 flags = hook->flags;
1484 verbose_observer = (flags & afb_hook_flag_global_vverbose) ? afb_hook_global_vverbose : NULL;
1485 pthread_rwlock_unlock(&rwlock);
1488 struct afb_hook_global *afb_hook_create_global(int flags, struct afb_hook_global_itf *itf, void *closure)
1490 struct afb_hook_global *hook;
1492 /* alloc the result */
1493 hook = calloc(1, sizeof *hook);
1497 /* initialise the rest */
1499 hook->flags = flags;
1500 hook->itf = itf ? itf : &hook_global_default_itf;
1501 hook->closure = closure;
1503 /* record the hook */
1504 pthread_rwlock_wrlock(&rwlock);
1505 hook->next = list_of_global_hooks;
1506 list_of_global_hooks = hook;
1507 pthread_rwlock_unlock(&rwlock);
1509 /* update hooking */
1516 struct afb_hook_global *afb_hook_addref_global(struct afb_hook_global *hook)
1518 pthread_rwlock_wrlock(&rwlock);
1520 pthread_rwlock_unlock(&rwlock);
1524 void afb_hook_unref_global(struct afb_hook_global *hook)
1526 struct afb_hook_global **prv;
1529 pthread_rwlock_wrlock(&rwlock);
1530 if (--hook->refcount)
1534 prv = &list_of_global_hooks;
1535 while (*prv && *prv != hook)
1536 prv = &(*prv)->next;
1540 pthread_rwlock_unlock(&rwlock);
1545 /* update hooking */