X-Git-Url: https://gerrit.automotivelinux.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fafb-hook.c;h=12cf7a129ee49fd2894b2e05e61a67797a03db9f;hb=e0fa1cdd56ffb97fedc3ba8df482a14323d876c7;hp=bafbbe90f5cf4426b73b30fb58bfbba77f896308;hpb=4846cec0be7f41f992b9f89b7adb97033e15b1a0;p=src%2Fapp-framework-binder.git diff --git a/src/afb-hook.c b/src/afb-hook.c index bafbbe90..12cf7a12 100644 --- a/src/afb-hook.c +++ b/src/afb-hook.c @@ -17,173 +17,353 @@ #define _GNU_SOURCE +#include #include #include #include #include +#include +#include +#include #include -#include -#include +#include +#include #include "afb-context.h" #include "afb-hook.h" #include "afb-session.h" +#include "afb-cred.h" #include "afb-xreq.h" +#include "afb-export.h" +#include "afb-evt.h" #include "verbose.h" /** - * Definition of a hook + * Definition of a hook for xreq */ -struct afb_hook { - struct afb_hook *next; /**< next hook */ +struct afb_hook_xreq { + struct afb_hook_xreq *next; /**< next hook */ unsigned refcount; /**< reference count */ char *api; /**< api hooked or NULL for any */ char *verb; /**< verb hooked or NULL for any */ struct afb_session *session; /**< session hooked or NULL if any */ unsigned flags; /**< hook flags */ - struct afb_hook_xreq_itf *reqitf; /**< interface of hook */ + struct afb_hook_xreq_itf *itf; /**< interface of hook */ void *closure; /**< closure for callbacks */ }; -/* - * Structure for handling subcalls callbacks +/** + * Definition of a hook for export + */ +struct afb_hook_ditf { + struct afb_hook_ditf *next; /**< next hook */ + unsigned refcount; /**< reference count */ + char *api; /**< api hooked or NULL for any */ + unsigned flags; /**< hook flags */ + struct afb_hook_ditf_itf *itf; /**< interface of hook */ + void *closure; /**< closure for callbacks */ +}; + +/** + * Definition of a hook for export + */ +struct afb_hook_svc { + struct afb_hook_svc *next; /**< next hook */ + unsigned refcount; /**< reference count */ + char *api; /**< api hooked or NULL for any */ + unsigned flags; /**< hook flags */ + struct afb_hook_svc_itf *itf; /**< interface of hook */ + void *closure; /**< closure for callbacks */ +}; + +/** + * Definition of a hook for evt + */ +struct afb_hook_evt { + struct afb_hook_evt *next; /**< next hook */ + unsigned refcount; /**< reference count */ + char *pattern; /**< event pattern name hooked or NULL for any */ + unsigned flags; /**< hook flags */ + struct afb_hook_evt_itf *itf; /**< interface of hook */ + void *closure; /**< closure for callbacks */ +}; + +/** + * Definition of a hook for global */ -struct hook_subcall { - struct afb_xreq *xreq; /* hookd request */ - void (*callback)(void*, int, struct json_object*); /* client callback */ - void *cb_closure; /* cient closure */ +struct afb_hook_global { + struct afb_hook_global *next; /**< next hook */ + unsigned refcount; /**< reference count */ + unsigned flags; /**< hook flags */ + struct afb_hook_global_itf *itf; /**< interface of hook */ + void *closure; /**< closure for callbacks */ }; /* synchronisation across threads */ static pthread_rwlock_t rwlock = PTHREAD_RWLOCK_INITIALIZER; -/* list of hooks */ -static struct afb_hook *list_of_hooks = NULL; +/* list of hooks for xreq */ +static struct afb_hook_xreq *list_of_xreq_hooks = NULL; + +/* list of hooks for export */ +static struct afb_hook_ditf *list_of_ditf_hooks = NULL; + +/* list of hooks for export */ +static struct afb_hook_svc *list_of_svc_hooks = NULL; + +/* list of hooks for evt */ +static struct afb_hook_evt *list_of_evt_hooks = NULL; + +/* list of hooks for global */ +static struct afb_hook_global *list_of_global_hooks = NULL; + +/* hook id */ +static unsigned next_hookid = 0; + +/****************************************************************************** + * section: hook id + *****************************************************************************/ +static void init_hookid(struct afb_hookid *hookid) +{ + hookid->id = __atomic_add_fetch(&next_hookid, 1, __ATOMIC_RELAXED); + clock_gettime(CLOCK_MONOTONIC, &hookid->time); +} /****************************************************************************** * section: default callbacks for tracing requests *****************************************************************************/ +static char *_pbuf_(const char *fmt, va_list args, char **palloc, char *sbuf, size_t szsbuf, size_t *outlen) +{ + int rc; + va_list cp; + + *palloc = NULL; + va_copy(cp, args); + rc = vsnprintf(sbuf, szsbuf, fmt, args); + if ((size_t)rc >= szsbuf) { + sbuf[szsbuf-1] = 0; + sbuf[szsbuf-2] = sbuf[szsbuf-3] = sbuf[szsbuf-4] = '.'; + rc = vasprintf(palloc, fmt, cp); + if (rc >= 0) + sbuf = *palloc; + } + va_end(cp); + if (rc >= 0 && outlen) + *outlen = (size_t)rc; + return sbuf; +} + +#if 0 /* old behaviour: use NOTICE */ +static void _hook_(const char *fmt1, const char *fmt2, va_list arg2, ...) +{ + char *tag, *data, *mem1, *mem2, buf1[256], buf2[2000]; + va_list arg1; + + data = _pbuf_(fmt2, arg2, &mem2, buf2, sizeof buf2, NULL); + + va_start(arg1, arg2); + tag = _pbuf_(fmt1, arg1, &mem1, buf1, sizeof buf1, NULL); + va_end(arg1); + + NOTICE("[HOOK %s] %s", tag, data); + + free(mem1); + free(mem2); +} +#else /* new behaviour: emits directly to stderr */ +static void _hook_(const char *fmt1, const char *fmt2, va_list arg2, ...) +{ + static const char chars[] = "HOOK: [] \n"; + char *mem1, *mem2, buf1[256], buf2[2000]; + struct iovec iov[5]; + va_list arg1; + + iov[0].iov_base = (void*)&chars[0]; + iov[0].iov_len = 7; + + va_start(arg1, arg2); + iov[1].iov_base = _pbuf_(fmt1, arg1, &mem1, buf1, sizeof buf1, &iov[1].iov_len); + va_end(arg1); + + iov[2].iov_base = (void*)&chars[7]; + iov[2].iov_len = 2; + + iov[3].iov_base = _pbuf_(fmt2, arg2, &mem2, buf2, sizeof buf2, &iov[3].iov_len); + + iov[4].iov_base = (void*)&chars[9]; + iov[4].iov_len = 1; + + writev(2, iov, 5); + + free(mem1); + free(mem2); +} +#endif + static void _hook_xreq_(const struct afb_xreq *xreq, const char *format, ...) { - int len; - char *buffer; va_list ap; - va_start(ap, format); - len = vasprintf(&buffer, format, ap); + _hook_("xreq-%06d:%s/%s", format, ap, xreq->hookindex, xreq->api, xreq->verb); va_end(ap); - - if (len < 0) - NOTICE("hook xreq-%06d:%s/%s allocation error", xreq->hookindex, xreq->api, xreq->verb); - else { - NOTICE("hook xreq-%06d:%s/%s %s", xreq->hookindex, xreq->api, xreq->verb, buffer); - free(buffer); - } } -static void hook_xreq_begin_default_cb(void * closure, const struct afb_xreq *xreq) +static void hook_xreq_begin_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq) { - _hook_xreq_(xreq, "BEGIN"); + if (!xreq->cred) + _hook_xreq_(xreq, "BEGIN"); + else + _hook_xreq_(xreq, "BEGIN uid=%d=%s gid=%d pid=%d label=%s id=%s", + (int)xreq->cred->uid, + xreq->cred->user, + (int)xreq->cred->gid, + (int)xreq->cred->pid, + xreq->cred->label?:"(null)", + xreq->cred->id?:"(null)" + ); } -static void hook_xreq_end_default_cb(void * closure, const struct afb_xreq *xreq) +static void hook_xreq_end_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq) { _hook_xreq_(xreq, "END"); } -static void hook_xreq_json_default_cb(void * closure, const struct afb_xreq *xreq, struct json_object *obj) +static void hook_xreq_json_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct json_object *obj) { _hook_xreq_(xreq, "json() -> %s", json_object_to_json_string(obj)); } -static void hook_xreq_get_default_cb(void * closure, const struct afb_xreq *xreq, const char *name, struct afb_arg arg) +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) { _hook_xreq_(xreq, "get(%s) -> { name: %s, value: %s, path: %s }", name, arg.name, arg.value, arg.path); } -static void hook_xreq_success_default_cb(void * closure, const struct afb_xreq *xreq, struct json_object *obj, const char *info) +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) { _hook_xreq_(xreq, "success(%s, %s)", json_object_to_json_string(obj), info); } -static void hook_xreq_fail_default_cb(void * closure, const struct afb_xreq *xreq, const char *status, const char *info) +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) { _hook_xreq_(xreq, "fail(%s, %s)", status, info); } -static void hook_xreq_raw_default_cb(void * closure, const struct afb_xreq *xreq, const char *buffer, size_t size) -{ - _hook_xreq_(xreq, "raw() -> %.*s", (int)size, buffer); -} - -static void hook_xreq_send_default_cb(void * closure, const struct afb_xreq *xreq, const char *buffer, size_t size) -{ - _hook_xreq_(xreq, "send(%.*s)", (int)size, buffer); -} - -static void hook_xreq_context_get_default_cb(void * closure, const struct afb_xreq *xreq, void *value) +static void hook_xreq_context_get_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, void *value) { _hook_xreq_(xreq, "context_get() -> %p", value); } -static void hook_xreq_context_set_default_cb(void * closure, const struct afb_xreq *xreq, void *value, void (*free_value)(void*)) +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*)) { _hook_xreq_(xreq, "context_set(%p, %p)", value, free_value); } -static void hook_xreq_addref_default_cb(void * closure, const struct afb_xreq *xreq) +static void hook_xreq_addref_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq) { _hook_xreq_(xreq, "addref()"); } -static void hook_xreq_unref_default_cb(void * closure, const struct afb_xreq *xreq) +static void hook_xreq_unref_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq) { _hook_xreq_(xreq, "unref()"); } -static void hook_xreq_session_close_default_cb(void * closure, const struct afb_xreq *xreq) +static void hook_xreq_session_close_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq) { _hook_xreq_(xreq, "session_close()"); } -static void hook_xreq_session_set_LOA_default_cb(void * closure, const struct afb_xreq *xreq, unsigned level, int result) +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) { _hook_xreq_(xreq, "session_set_LOA(%u) -> %d", level, result); } -static void hook_xreq_subscribe_default_cb(void * closure, const struct afb_xreq *xreq, struct afb_event event, int result) +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) { - _hook_xreq_(xreq, "subscribe(%s:%p) -> %d", afb_event_name(event), event.closure, result); + _hook_xreq_(xreq, "subscribe(%s:%d) -> %d", afb_evt_event_fullname(event), afb_evt_event_id(event), result); } -static void hook_xreq_unsubscribe_default_cb(void * closure, const struct afb_xreq *xreq, struct afb_event event, int result) +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) { - _hook_xreq_(xreq, "unsubscribe(%s:%p) -> %d", afb_event_name(event), event.closure, result); + _hook_xreq_(xreq, "unsubscribe(%s:%d) -> %d", afb_evt_event_fullname(event), afb_evt_event_id(event), result); } -static void hook_xreq_subcall_default_cb(void * closure, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args) +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) { _hook_xreq_(xreq, "subcall(%s/%s, %s) ...", api, verb, json_object_to_json_string(args)); } -static void hook_xreq_subcall_result_default_cb(void * closure, const struct afb_xreq *xreq, int status, struct json_object *result) +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) { _hook_xreq_(xreq, " ...subcall... -> %d: %s", status, json_object_to_json_string(result)); } -static void hook_xreq_subcallsync_default_cb(void * closure, const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args) +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) { _hook_xreq_(xreq, "subcallsync(%s/%s, %s) ...", api, verb, json_object_to_json_string(args)); } -static void hook_xreq_subcallsync_result_default_cb(void * closure, const struct afb_xreq *xreq, int status, struct json_object *result) +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) { _hook_xreq_(xreq, " ...subcallsync... -> %d: %s", status, json_object_to_json_string(result)); } +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) +{ + int len; + char *msg; + va_list ap; + + va_copy(ap, args); + len = vasprintf(&msg, fmt, ap); + va_end(ap); + + if (len < 0) + _hook_xreq_(xreq, "vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, func, fmt); + else { + _hook_xreq_(xreq, "vverbose(%d, %s, %d, %s) -> %s", level, file, line, func, msg); + free(msg); + } +} + +static void hook_xreq_store_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, struct afb_stored_req *sreq) +{ + _hook_xreq_(xreq, "store() -> %p", sreq); +} + +static void hook_xreq_unstore_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq) +{ + _hook_xreq_(xreq, "unstore()"); +} + +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) +{ + _hook_xreq_(xreq, "subcall_req(%s/%s, %s) ...", api, verb, json_object_to_json_string(args)); +} + +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) +{ + _hook_xreq_(xreq, " ...subcall_req... -> %d: %s", status, json_object_to_json_string(result)); +} + +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) +{ + _hook_xreq_(xreq, "has_permission(%s) -> %d", permission, result); +} + +static void hook_xreq_get_application_id_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_xreq *xreq, char *result) +{ + _hook_xreq_(xreq, "get_application_id() -> %s", result); +} + +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) +{ + _hook_xreq_(xreq, "context_make(replace=%s, %p, %p, %p) -> %p", replace?"yes":"no", create_value, free_value, create_closure, result); +} + static struct afb_hook_xreq_itf hook_xreq_default_itf = { .hook_xreq_begin = hook_xreq_begin_default_cb, .hook_xreq_end = hook_xreq_end_default_cb, @@ -191,8 +371,6 @@ static struct afb_hook_xreq_itf hook_xreq_default_itf = { .hook_xreq_get = hook_xreq_get_default_cb, .hook_xreq_success = hook_xreq_success_default_cb, .hook_xreq_fail = hook_xreq_fail_default_cb, - .hook_xreq_raw = hook_xreq_raw_default_cb, - .hook_xreq_send = hook_xreq_send_default_cb, .hook_xreq_context_get = hook_xreq_context_get_default_cb, .hook_xreq_context_set = hook_xreq_context_set_default_cb, .hook_xreq_addref = hook_xreq_addref_default_cb, @@ -205,6 +383,14 @@ static struct afb_hook_xreq_itf hook_xreq_default_itf = { .hook_xreq_subcall_result = hook_xreq_subcall_result_default_cb, .hook_xreq_subcallsync = hook_xreq_subcallsync_default_cb, .hook_xreq_subcallsync_result = hook_xreq_subcallsync_result_default_cb, + .hook_xreq_vverbose = hook_xreq_vverbose_default_cb, + .hook_xreq_store = hook_xreq_store_default_cb, + .hook_xreq_unstore = hook_xreq_unstore_default_cb, + .hook_xreq_subcall_req = hook_xreq_subcall_req_default_cb, + .hook_xreq_subcall_req_result = hook_xreq_subcall_req_result_default_cb, + .hook_xreq_has_permission = hook_xreq_has_permission_default_cb, + .hook_xreq_get_application_id = hook_xreq_get_application_id_default_cb, + .hook_xreq_context_make = hook_xreq_context_make_default_cb }; /****************************************************************************** @@ -212,16 +398,18 @@ static struct afb_hook_xreq_itf hook_xreq_default_itf = { *****************************************************************************/ #define _HOOK_XREQ_(what,...) \ - struct afb_hook *hook; \ + struct afb_hook_xreq *hook; \ + struct afb_hookid hookid; \ pthread_rwlock_rdlock(&rwlock); \ - hook = list_of_hooks; \ + init_hookid(&hookid); \ + hook = list_of_xreq_hooks; \ while (hook) { \ - if (hook->reqitf->hook_xreq_##what \ + if (hook->itf->hook_xreq_##what \ && (hook->flags & afb_hook_flag_req_##what) != 0 \ && (!hook->session || hook->session == xreq->context.session) \ && (!hook->api || !strcasecmp(hook->api, xreq->api)) \ && (!hook->verb || !strcasecmp(hook->verb, xreq->verb))) { \ - hook->reqitf->hook_xreq_##what(hook->closure, __VA_ARGS__); \ + hook->itf->hook_xreq_##what(hook->closure, &hookid, __VA_ARGS__); \ } \ hook = hook->next; \ } \ @@ -260,17 +448,6 @@ void afb_hook_xreq_fail(const struct afb_xreq *xreq, const char *status, const c _HOOK_XREQ_(fail, xreq, status, info); } -const char *afb_hook_xreq_raw(const struct afb_xreq *xreq, const char *buffer, size_t size) -{ - _HOOK_XREQ_(raw, xreq, buffer, size); - return buffer; -} - -void afb_hook_xreq_send(const struct afb_xreq *xreq, const char *buffer, size_t size) -{ - _HOOK_XREQ_(send, xreq, buffer, size); -} - void *afb_hook_xreq_context_get(const struct afb_xreq *xreq, void *value) { _HOOK_XREQ_(context_get, xreq, value); @@ -336,8 +513,51 @@ int afb_hook_xreq_subcallsync_result(const struct afb_xreq *xreq, int status, st return status; } +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) +{ + _HOOK_XREQ_(vverbose, xreq, level, file ?: "?", line, func ?: "?", fmt, args); +} + +void afb_hook_xreq_store(const struct afb_xreq *xreq, struct afb_stored_req *sreq) +{ + _HOOK_XREQ_(store, xreq, sreq); +} + +void afb_hook_xreq_unstore(const struct afb_xreq *xreq) +{ + _HOOK_XREQ_(unstore, xreq); +} + +void afb_hook_xreq_subcall_req(const struct afb_xreq *xreq, const char *api, const char *verb, struct json_object *args) +{ + _HOOK_XREQ_(subcall_req, xreq, api, verb, args); +} + +void afb_hook_xreq_subcall_req_result(const struct afb_xreq *xreq, int status, struct json_object *result) +{ + _HOOK_XREQ_(subcall_req_result, xreq, status, result); +} + +int afb_hook_xreq_has_permission(const struct afb_xreq *xreq, const char *permission, int result) +{ + _HOOK_XREQ_(has_permission, xreq, permission, result); + return result; +} + +char *afb_hook_xreq_get_application_id(const struct afb_xreq *xreq, char *result) +{ + _HOOK_XREQ_(get_application_id, xreq, result); + return result; +} + +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) +{ + _HOOK_XREQ_(context_make, xreq, replace, create_value, free_value, create_closure, result); + return result; +} + /****************************************************************************** - * section: + * section: hooking xreqs *****************************************************************************/ void afb_hook_init_xreq(struct afb_xreq *xreq) @@ -346,12 +566,12 @@ void afb_hook_init_xreq(struct afb_xreq *xreq) int f, flags; int add; - struct afb_hook *hook; + struct afb_hook_xreq *hook; /* scan hook list to get the expected flags */ flags = 0; pthread_rwlock_rdlock(&rwlock); - hook = list_of_hooks; + hook = list_of_xreq_hooks; while (hook) { f = hook->flags & afb_hook_flags_req_all; add = f != 0 @@ -375,12 +595,12 @@ void afb_hook_init_xreq(struct afb_xreq *xreq) } } -struct afb_hook *afb_hook_xreq_create(const char *api, const char *verb, struct afb_session *session, unsigned flags, struct afb_hook_xreq_itf *itf, void *closure) +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) { - struct afb_hook *hook; + struct afb_hook_xreq *hook; /* alloc the result */ - hook = malloc(sizeof *hook); + hook = calloc(1, sizeof *hook); if (hook == NULL) return NULL; @@ -400,20 +620,20 @@ struct afb_hook *afb_hook_xreq_create(const char *api, const char *verb, struct afb_session_addref(session); hook->refcount = 1; hook->flags = flags; - hook->reqitf = itf ? itf : &hook_xreq_default_itf; + hook->itf = itf ? itf : &hook_xreq_default_itf; hook->closure = closure; /* record the hook */ pthread_rwlock_wrlock(&rwlock); - hook->next = list_of_hooks; - list_of_hooks = hook; + hook->next = list_of_xreq_hooks; + list_of_xreq_hooks = hook; pthread_rwlock_unlock(&rwlock); /* returns it */ return hook; } -struct afb_hook *afb_hook_addref(struct afb_hook *hook) +struct afb_hook_xreq *afb_hook_addref_xreq(struct afb_hook_xreq *hook) { pthread_rwlock_wrlock(&rwlock); hook->refcount++; @@ -421,9 +641,9 @@ struct afb_hook *afb_hook_addref(struct afb_hook *hook) return hook; } -void afb_hook_unref(struct afb_hook *hook) +void afb_hook_unref_xreq(struct afb_hook_xreq *hook) { - struct afb_hook **prv; + struct afb_hook_xreq **prv; if (hook) { pthread_rwlock_wrlock(&rwlock); @@ -431,7 +651,7 @@ void afb_hook_unref(struct afb_hook *hook) hook = NULL; else { /* unlink */ - prv = &list_of_hooks; + prv = &list_of_xreq_hooks; while (*prv && *prv != hook) prv = &(*prv)->next; if(*prv) @@ -449,3 +669,882 @@ void afb_hook_unref(struct afb_hook *hook) } } +/****************************************************************************** + * section: default callbacks for tracing daemon interface + *****************************************************************************/ + +static void _hook_ditf_(const struct afb_export *export, const char *format, ...) +{ + va_list ap; + va_start(ap, format); + _hook_("export-%s", format, ap, afb_export_apiname(export)); + va_end(ap); +} + +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) +{ + _hook_ditf_(export, "event_broadcast.before(%s, %s)....", name, json_object_to_json_string(object)); +} + +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) +{ + _hook_ditf_(export, "event_broadcast.after(%s, %s) -> %d", name, json_object_to_json_string(object), result); +} + +static void hook_ditf_get_event_loop_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_event *result) +{ + _hook_ditf_(export, "get_event_loop() -> %p", result); +} + +static void hook_ditf_get_user_bus_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_bus *result) +{ + _hook_ditf_(export, "get_user_bus() -> %p", result); +} + +static void hook_ditf_get_system_bus_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct sd_bus *result) +{ + _hook_ditf_(export, "get_system_bus() -> %p", result); +} + +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) +{ + int len; + char *msg; + va_list ap; + + va_copy(ap, args); + len = vasprintf(&msg, fmt, ap); + va_end(ap); + + if (len < 0) + _hook_ditf_(export, "vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, function, fmt); + else { + _hook_ditf_(export, "vverbose(%d, %s, %d, %s) -> %s", level, file, line, function, msg); + free(msg); + } +} + +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) +{ + _hook_ditf_(export, "event_make(%s) -> %s:%d", name, afb_evt_event_fullname(result), afb_evt_event_id(result)); +} + +static void hook_ditf_rootdir_get_fd_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int result) +{ + char path[PATH_MAX]; + if (result < 0) + _hook_ditf_(export, "rootdir_get_fd() -> %d, %m", result); + else { + sprintf(path, "/proc/self/fd/%d", result); + readlink(path, path, sizeof path); + _hook_ditf_(export, "rootdir_get_fd() -> %d = %s", result, path); + } +} + +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) +{ + char path[PATH_MAX]; + if (!locale) + locale = "(null)"; + if (result < 0) + _hook_ditf_(export, "rootdir_open_locale(%s, %d, %s) -> %d, %m", filename, flags, locale, result); + else { + sprintf(path, "/proc/self/fd/%d", result); + readlink(path, path, sizeof path); + _hook_ditf_(export, "rootdir_open_locale(%s, %d, %s) -> %d = %s", filename, flags, locale, result, path); + } +} + +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) +{ + _hook_ditf_(export, "queue_job(%p, %p, %p, %d) -> %d", callback, argument, group, timeout, result); +} + +static void hook_ditf_unstore_req_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, struct afb_stored_req *sreq) +{ + _hook_ditf_(export, "unstore_req(%p)", sreq); +} + +static void hook_ditf_require_api_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, const char *name, int initialized) +{ + _hook_ditf_(export, "require_api(%s, %d)...", name, initialized); +} + +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) +{ + _hook_ditf_(export, "...require_api(%s, %d) -> %d", name, initialized, result); +} + +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) +{ + _hook_ditf_(export, "rename_api(%s -> %s) -> %d", oldname, newname, result); +} + +static struct afb_hook_ditf_itf hook_ditf_default_itf = { + .hook_ditf_event_broadcast_before = hook_ditf_event_broadcast_before_cb, + .hook_ditf_event_broadcast_after = hook_ditf_event_broadcast_after_cb, + .hook_ditf_get_event_loop = hook_ditf_get_event_loop_cb, + .hook_ditf_get_user_bus = hook_ditf_get_user_bus_cb, + .hook_ditf_get_system_bus = hook_ditf_get_system_bus_cb, + .hook_ditf_vverbose = hook_ditf_vverbose_cb, + .hook_ditf_event_make = hook_ditf_event_make_cb, + .hook_ditf_rootdir_get_fd = hook_ditf_rootdir_get_fd_cb, + .hook_ditf_rootdir_open_locale = hook_ditf_rootdir_open_locale_cb, + .hook_ditf_queue_job = hook_ditf_queue_job_cb, + .hook_ditf_unstore_req = hook_ditf_unstore_req_cb, + .hook_ditf_require_api = hook_ditf_require_api_cb, + .hook_ditf_require_api_result = hook_ditf_require_api_result_cb, + .hook_ditf_rename_api = hook_ditf_rename_api_cb +}; + +/****************************************************************************** + * section: hooks for tracing daemon interface (export) + *****************************************************************************/ + +#define _HOOK_DITF_(what,...) \ + struct afb_hook_ditf *hook; \ + struct afb_hookid hookid; \ + const char *apiname = afb_export_apiname(export); \ + pthread_rwlock_rdlock(&rwlock); \ + init_hookid(&hookid); \ + hook = list_of_ditf_hooks; \ + while (hook) { \ + if (hook->itf->hook_ditf_##what \ + && (hook->flags & afb_hook_flag_ditf_##what) != 0 \ + && (!hook->api || !strcasecmp(hook->api, apiname))) { \ + hook->itf->hook_ditf_##what(hook->closure, &hookid, __VA_ARGS__); \ + } \ + hook = hook->next; \ + } \ + pthread_rwlock_unlock(&rwlock); + +void afb_hook_ditf_event_broadcast_before(const struct afb_export *export, const char *name, struct json_object *object) +{ + _HOOK_DITF_(event_broadcast_before, export, name, object); +} + +int afb_hook_ditf_event_broadcast_after(const struct afb_export *export, const char *name, struct json_object *object, int result) +{ + _HOOK_DITF_(event_broadcast_after, export, name, object, result); + return result; +} + +struct sd_event *afb_hook_ditf_get_event_loop(const struct afb_export *export, struct sd_event *result) +{ + _HOOK_DITF_(get_event_loop, export, result); + return result; +} + +struct sd_bus *afb_hook_ditf_get_user_bus(const struct afb_export *export, struct sd_bus *result) +{ + _HOOK_DITF_(get_user_bus, export, result); + return result; +} + +struct sd_bus *afb_hook_ditf_get_system_bus(const struct afb_export *export, struct sd_bus *result) +{ + _HOOK_DITF_(get_system_bus, export, result); + return result; +} + +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) +{ + _HOOK_DITF_(vverbose, export, level, file, line, function, fmt, args); +} + +struct afb_event afb_hook_ditf_event_make(const struct afb_export *export, const char *name, struct afb_event result) +{ + _HOOK_DITF_(event_make, export, name, result); + return result; +} + +int afb_hook_ditf_rootdir_get_fd(const struct afb_export *export, int result) +{ + _HOOK_DITF_(rootdir_get_fd, export, result); + return result; +} + +int afb_hook_ditf_rootdir_open_locale(const struct afb_export *export, const char *filename, int flags, const char *locale, int result) +{ + _HOOK_DITF_(rootdir_open_locale, export, filename, flags, locale, result); + return result; +} + +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) +{ + _HOOK_DITF_(queue_job, export, callback, argument, group, timeout, result); + return result; +} + +void afb_hook_ditf_unstore_req(const struct afb_export *export, struct afb_stored_req *sreq) +{ + _HOOK_DITF_(unstore_req, export, sreq); +} + +void afb_hook_ditf_require_api(const struct afb_export *export, const char *name, int initialized) +{ + _HOOK_DITF_(require_api, export, name, initialized); +} + +int afb_hook_ditf_require_api_result(const struct afb_export *export, const char *name, int initialized, int result) +{ + _HOOK_DITF_(require_api_result, export, name, initialized, result); + return result; +} + +int afb_hook_ditf_rename_api(const struct afb_export *export, const char *oldname, const char *newname, int result) +{ + _HOOK_DITF_(rename_api, export, oldname, newname, result); + return result; +} + +/****************************************************************************** + * section: hooking export + *****************************************************************************/ + +int afb_hook_flags_ditf(const char *api) +{ + int flags; + struct afb_hook_ditf *hook; + + pthread_rwlock_rdlock(&rwlock); + flags = 0; + hook = list_of_ditf_hooks; + while (hook) { + if (!api || !hook->api || !strcasecmp(hook->api, api)) + flags |= hook->flags; + hook = hook->next; + } + pthread_rwlock_unlock(&rwlock); + return flags; +} + +struct afb_hook_ditf *afb_hook_create_ditf(const char *api, int flags, struct afb_hook_ditf_itf *itf, void *closure) +{ + struct afb_hook_ditf *hook; + + /* alloc the result */ + hook = calloc(1, sizeof *hook); + if (hook == NULL) + return NULL; + + /* get a copy of the names */ + hook->api = api ? strdup(api) : NULL; + if (api && !hook->api) { + free(hook); + return NULL; + } + + /* initialise the rest */ + hook->refcount = 1; + hook->flags = flags; + hook->itf = itf ? itf : &hook_ditf_default_itf; + hook->closure = closure; + + /* record the hook */ + pthread_rwlock_wrlock(&rwlock); + hook->next = list_of_ditf_hooks; + list_of_ditf_hooks = hook; + pthread_rwlock_unlock(&rwlock); + + /* returns it */ + return hook; +} + +struct afb_hook_ditf *afb_hook_addref_ditf(struct afb_hook_ditf *hook) +{ + pthread_rwlock_wrlock(&rwlock); + hook->refcount++; + pthread_rwlock_unlock(&rwlock); + return hook; +} + +void afb_hook_unref_ditf(struct afb_hook_ditf *hook) +{ + struct afb_hook_ditf **prv; + + if (hook) { + pthread_rwlock_wrlock(&rwlock); + if (--hook->refcount) + hook = NULL; + else { + /* unlink */ + prv = &list_of_ditf_hooks; + while (*prv && *prv != hook) + prv = &(*prv)->next; + if(*prv) + *prv = hook->next; + } + pthread_rwlock_unlock(&rwlock); + if (hook) { + /* free */ + free(hook->api); + free(hook); + } + } +} + +/****************************************************************************** + * section: default callbacks for tracing service interface (export) + *****************************************************************************/ + +static void _hook_svc_(const struct afb_export *export, const char *format, ...) +{ + va_list ap; + va_start(ap, format); + _hook_("export-%s", format, ap, afb_export_apiname(export)); + va_end(ap); +} + +static void hook_svc_start_before_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export) +{ + _hook_svc_(export, "start.before"); +} + +static void hook_svc_start_after_default_cb(void *closure, const struct afb_hookid *hookid, const struct afb_export *export, int status) +{ + _hook_svc_(export, "start.after -> %d", status); +} + +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) +{ + _hook_svc_(export, "on_event.before(%s, %d, %s)", event, eventid, json_object_to_json_string(object)); +} + +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) +{ + _hook_svc_(export, "on_event.after(%s, %d, %s)", event, eventid, json_object_to_json_string(object)); +} + +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) +{ + _hook_svc_(export, "call(%s/%s, %s) ...", api, verb, json_object_to_json_string(args)); +} + +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) +{ + _hook_svc_(export, " ...call... -> %d: %s", status, json_object_to_json_string(result)); +} + +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) +{ + _hook_svc_(export, "callsync(%s/%s, %s) ...", api, verb, json_object_to_json_string(args)); +} + +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) +{ + _hook_svc_(export, " ...callsync... -> %d: %s", status, json_object_to_json_string(result)); +} + +static struct afb_hook_svc_itf hook_svc_default_itf = { + .hook_svc_start_before = hook_svc_start_before_default_cb, + .hook_svc_start_after = hook_svc_start_after_default_cb, + .hook_svc_on_event_before = hook_svc_on_event_before_default_cb, + .hook_svc_on_event_after = hook_svc_on_event_after_default_cb, + .hook_svc_call = hook_svc_call_default_cb, + .hook_svc_call_result = hook_svc_call_result_default_cb, + .hook_svc_callsync = hook_svc_callsync_default_cb, + .hook_svc_callsync_result = hook_svc_callsync_result_default_cb +}; + +/****************************************************************************** + * section: hooks for tracing service interface (export) + *****************************************************************************/ + +#define _HOOK_SVC_(what,...) \ + struct afb_hook_svc *hook; \ + struct afb_hookid hookid; \ + const char *apiname = afb_export_apiname(export); \ + pthread_rwlock_rdlock(&rwlock); \ + init_hookid(&hookid); \ + hook = list_of_svc_hooks; \ + while (hook) { \ + if (hook->itf->hook_svc_##what \ + && (hook->flags & afb_hook_flag_svc_##what) != 0 \ + && (!hook->api || !strcasecmp(hook->api, apiname))) { \ + hook->itf->hook_svc_##what(hook->closure, &hookid, __VA_ARGS__); \ + } \ + hook = hook->next; \ + } \ + pthread_rwlock_unlock(&rwlock); + +void afb_hook_svc_start_before(const struct afb_export *export) +{ + _HOOK_SVC_(start_before, export); +} + +int afb_hook_svc_start_after(const struct afb_export *export, int status) +{ + _HOOK_SVC_(start_after, export, status); + return status; +} + +void afb_hook_svc_on_event_before(const struct afb_export *export, const char *event, int eventid, struct json_object *object) +{ + _HOOK_SVC_(on_event_before, export, event, eventid, object); +} + +void afb_hook_svc_on_event_after(const struct afb_export *export, const char *event, int eventid, struct json_object *object) +{ + _HOOK_SVC_(on_event_after, export, event, eventid, object); +} + +void afb_hook_svc_call(const struct afb_export *export, const char *api, const char *verb, struct json_object *args) +{ + _HOOK_SVC_(call, export, api, verb, args); +} + +void afb_hook_svc_call_result(const struct afb_export *export, int status, struct json_object *result) +{ + _HOOK_SVC_(call_result, export, status, result); +} + +void afb_hook_svc_callsync(const struct afb_export *export, const char *api, const char *verb, struct json_object *args) +{ + _HOOK_SVC_(callsync, export, api, verb, args); +} + +int afb_hook_svc_callsync_result(const struct afb_export *export, int status, struct json_object *result) +{ + _HOOK_SVC_(callsync_result, export, status, result); + return status; +} + +/****************************************************************************** + * section: hooking services (export) + *****************************************************************************/ + +int afb_hook_flags_svc(const char *api) +{ + int flags; + struct afb_hook_svc *hook; + + pthread_rwlock_rdlock(&rwlock); + flags = 0; + hook = list_of_svc_hooks; + while (hook) { + if (!api || !hook->api || !strcasecmp(hook->api, api)) + flags |= hook->flags; + hook = hook->next; + } + pthread_rwlock_unlock(&rwlock); + return flags; +} + +struct afb_hook_svc *afb_hook_create_svc(const char *api, int flags, struct afb_hook_svc_itf *itf, void *closure) +{ + struct afb_hook_svc *hook; + + /* alloc the result */ + hook = calloc(1, sizeof *hook); + if (hook == NULL) + return NULL; + + /* get a copy of the names */ + hook->api = api ? strdup(api) : NULL; + if (api && !hook->api) { + free(hook); + return NULL; + } + + /* initialise the rest */ + hook->refcount = 1; + hook->flags = flags; + hook->itf = itf ? itf : &hook_svc_default_itf; + hook->closure = closure; + + /* record the hook */ + pthread_rwlock_wrlock(&rwlock); + hook->next = list_of_svc_hooks; + list_of_svc_hooks = hook; + pthread_rwlock_unlock(&rwlock); + + /* returns it */ + return hook; +} + +struct afb_hook_svc *afb_hook_addref_svc(struct afb_hook_svc *hook) +{ + pthread_rwlock_wrlock(&rwlock); + hook->refcount++; + pthread_rwlock_unlock(&rwlock); + return hook; +} + +void afb_hook_unref_svc(struct afb_hook_svc *hook) +{ + struct afb_hook_svc **prv; + + if (hook) { + pthread_rwlock_wrlock(&rwlock); + if (--hook->refcount) + hook = NULL; + else { + /* unlink */ + prv = &list_of_svc_hooks; + while (*prv && *prv != hook) + prv = &(*prv)->next; + if(*prv) + *prv = hook->next; + } + pthread_rwlock_unlock(&rwlock); + if (hook) { + /* free */ + free(hook->api); + free(hook); + } + } +} + +/****************************************************************************** + * section: default callbacks for tracing service interface (evt) + *****************************************************************************/ + +static void _hook_evt_(const char *evt, int id, const char *format, ...) +{ + va_list ap; + va_start(ap, format); + _hook_("evt-%s:%d", format, ap, evt, id); + va_end(ap); +} + +static void hook_evt_create_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id) +{ + _hook_evt_(evt, id, "create"); +} + +static void hook_evt_push_before_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj) +{ + _hook_evt_(evt, id, "push.before(%s)", json_object_to_json_string(obj)); +} + + +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) +{ + _hook_evt_(evt, id, "push.after(%s) -> %d", json_object_to_json_string(obj), result); +} + +static void hook_evt_broadcast_before_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, struct json_object *obj) +{ + _hook_evt_(evt, id, "broadcast.before(%s)", json_object_to_json_string(obj)); +} + +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) +{ + _hook_evt_(evt, id, "broadcast.after(%s) -> %d", json_object_to_json_string(obj), result); +} + +static void hook_evt_name_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id, const char *result) +{ + _hook_evt_(evt, id, "name -> %s", result); +} + +static void hook_evt_addref_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id) +{ + _hook_evt_(evt, id, "addref"); +} + +static void hook_evt_unref_default_cb(void *closure, const struct afb_hookid *hookid, const char *evt, int id) +{ + _hook_evt_(evt, id, "unref"); +} + +static struct afb_hook_evt_itf hook_evt_default_itf = { + .hook_evt_create = hook_evt_create_default_cb, + .hook_evt_push_before = hook_evt_push_before_default_cb, + .hook_evt_push_after = hook_evt_push_after_default_cb, + .hook_evt_broadcast_before = hook_evt_broadcast_before_default_cb, + .hook_evt_broadcast_after = hook_evt_broadcast_after_default_cb, + .hook_evt_name = hook_evt_name_default_cb, + .hook_evt_addref = hook_evt_addref_default_cb, + .hook_evt_unref = hook_evt_unref_default_cb +}; + +/****************************************************************************** + * section: hooks for tracing events interface (evt) + *****************************************************************************/ + +#define _HOOK_EVT_(what,...) \ + struct afb_hook_evt *hook; \ + struct afb_hookid hookid; \ + pthread_rwlock_rdlock(&rwlock); \ + init_hookid(&hookid); \ + hook = list_of_evt_hooks; \ + while (hook) { \ + if (hook->itf->hook_evt_##what \ + && (hook->flags & afb_hook_flag_evt_##what) != 0 \ + && (!hook->pattern || !fnmatch(hook->pattern, evt, FNM_CASEFOLD))) { \ + hook->itf->hook_evt_##what(hook->closure, &hookid, __VA_ARGS__); \ + } \ + hook = hook->next; \ + } \ + pthread_rwlock_unlock(&rwlock); + +void afb_hook_evt_create(const char *evt, int id) +{ + _HOOK_EVT_(create, evt, id); +} + +void afb_hook_evt_push_before(const char *evt, int id, struct json_object *obj) +{ + _HOOK_EVT_(push_before, evt, id, obj); +} + +int afb_hook_evt_push_after(const char *evt, int id, struct json_object *obj, int result) +{ + _HOOK_EVT_(push_after, evt, id, obj, result); + return result; +} + +void afb_hook_evt_broadcast_before(const char *evt, int id, struct json_object *obj) +{ + _HOOK_EVT_(broadcast_before, evt, id, obj); +} + +int afb_hook_evt_broadcast_after(const char *evt, int id, struct json_object *obj, int result) +{ + _HOOK_EVT_(broadcast_after, evt, id, obj, result); + return result; +} + +void afb_hook_evt_name(const char *evt, int id, const char *result) +{ + _HOOK_EVT_(name, evt, id, result); +} + +void afb_hook_evt_addref(const char *evt, int id) +{ + _HOOK_EVT_(addref, evt, id); +} + +void afb_hook_evt_unref(const char *evt, int id) +{ + _HOOK_EVT_(unref, evt, id); +} + +/****************************************************************************** + * section: hooking services (evt) + *****************************************************************************/ + +int afb_hook_flags_evt(const char *name) +{ + int flags; + struct afb_hook_evt *hook; + + pthread_rwlock_rdlock(&rwlock); + flags = 0; + hook = list_of_evt_hooks; + while (hook) { + if (!name || !hook->pattern || !fnmatch(hook->pattern, name, FNM_CASEFOLD)) + flags |= hook->flags; + hook = hook->next; + } + pthread_rwlock_unlock(&rwlock); + return flags; +} + +struct afb_hook_evt *afb_hook_create_evt(const char *pattern, int flags, struct afb_hook_evt_itf *itf, void *closure) +{ + struct afb_hook_evt *hook; + + /* alloc the result */ + hook = calloc(1, sizeof *hook); + if (hook == NULL) + return NULL; + + /* get a copy of the names */ + hook->pattern = pattern ? strdup(pattern) : NULL; + if (pattern && !hook->pattern) { + free(hook); + return NULL; + } + + /* initialise the rest */ + hook->refcount = 1; + hook->flags = flags; + hook->itf = itf ? itf : &hook_evt_default_itf; + hook->closure = closure; + + /* record the hook */ + pthread_rwlock_wrlock(&rwlock); + hook->next = list_of_evt_hooks; + list_of_evt_hooks = hook; + pthread_rwlock_unlock(&rwlock); + + /* returns it */ + return hook; +} + +struct afb_hook_evt *afb_hook_addref_evt(struct afb_hook_evt *hook) +{ + pthread_rwlock_wrlock(&rwlock); + hook->refcount++; + pthread_rwlock_unlock(&rwlock); + return hook; +} + +void afb_hook_unref_evt(struct afb_hook_evt *hook) +{ + struct afb_hook_evt **prv; + + if (hook) { + pthread_rwlock_wrlock(&rwlock); + if (--hook->refcount) + hook = NULL; + else { + /* unlink */ + prv = &list_of_evt_hooks; + while (*prv && *prv != hook) + prv = &(*prv)->next; + if(*prv) + *prv = hook->next; + } + pthread_rwlock_unlock(&rwlock); + if (hook) { + /* free */ + free(hook->pattern); + free(hook); + } + } +} + +/****************************************************************************** + * section: default callbacks for globals (global) + *****************************************************************************/ + +static void _hook_global_(const char *format, ...) +{ + va_list ap; + va_start(ap, format); + _hook_("global", format, ap); + va_end(ap); +} + +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) +{ + int len; + char *msg; + va_list ap; + + va_copy(ap, args); + len = vasprintf(&msg, fmt, ap); + va_end(ap); + + if (len < 0) + _hook_global_("vverbose(%d, %s, %d, %s) -> %s ? ? ?", level, file, line, func, fmt); + else { + _hook_global_("vverbose(%d, %s, %d, %s) -> %s", level, file, line, func, msg); + free(msg); + } +} + +static struct afb_hook_global_itf hook_global_default_itf = { + .hook_global_vverbose = hook_global_vverbose_default_cb +}; + +/****************************************************************************** + * section: hooks for tracing globals (global) + *****************************************************************************/ + +#define _HOOK_GLOBAL_(what,...) \ + struct afb_hook_global *hook; \ + struct afb_hookid hookid; \ + pthread_rwlock_rdlock(&rwlock); \ + init_hookid(&hookid); \ + hook = list_of_global_hooks; \ + while (hook) { \ + if (hook->itf->hook_global_##what \ + && (hook->flags & afb_hook_flag_global_##what) != 0) { \ + hook->itf->hook_global_##what(hook->closure, &hookid, __VA_ARGS__); \ + } \ + hook = hook->next; \ + } \ + pthread_rwlock_unlock(&rwlock); + +static void afb_hook_global_vverbose(int level, const char *file, int line, const char *func, const char *fmt, va_list args) +{ + _HOOK_GLOBAL_(vverbose, level, file ?: "?", line, func ?: "?", fmt ?: "", args); +} + +/****************************************************************************** + * section: hooking globals (global) + *****************************************************************************/ + +static void update_global() +{ + struct afb_hook_global *hook; + int flags = 0; + + pthread_rwlock_rdlock(&rwlock); + hook = list_of_global_hooks; + while (hook) { + flags = hook->flags; + hook = hook->next; + } + verbose_observer = (flags & afb_hook_flag_global_vverbose) ? afb_hook_global_vverbose : NULL; + pthread_rwlock_unlock(&rwlock); +} + +struct afb_hook_global *afb_hook_create_global(int flags, struct afb_hook_global_itf *itf, void *closure) +{ + struct afb_hook_global *hook; + + /* alloc the result */ + hook = calloc(1, sizeof *hook); + if (hook == NULL) + return NULL; + + /* initialise the rest */ + hook->refcount = 1; + hook->flags = flags; + hook->itf = itf ? itf : &hook_global_default_itf; + hook->closure = closure; + + /* record the hook */ + pthread_rwlock_wrlock(&rwlock); + hook->next = list_of_global_hooks; + list_of_global_hooks = hook; + pthread_rwlock_unlock(&rwlock); + + /* update hooking */ + update_global(); + + /* returns it */ + return hook; +} + +struct afb_hook_global *afb_hook_addref_global(struct afb_hook_global *hook) +{ + pthread_rwlock_wrlock(&rwlock); + hook->refcount++; + pthread_rwlock_unlock(&rwlock); + return hook; +} + +void afb_hook_unref_global(struct afb_hook_global *hook) +{ + struct afb_hook_global **prv; + + if (hook) { + pthread_rwlock_wrlock(&rwlock); + if (--hook->refcount) + hook = NULL; + else { + /* unlink */ + prv = &list_of_global_hooks; + while (*prv && *prv != hook) + prv = &(*prv)->next; + if(*prv) + *prv = hook->next; + } + pthread_rwlock_unlock(&rwlock); + if (hook) { + /* free */ + free(hook); + + /* update hooking */ + update_global(); + } + } +} +