DECLARE_BITMAP(sc_compat_exit, NR_compat_syscalls);
};
+static
+int lttng_syscalls_create_matching_event_notifiers(struct lttng_event_enabler_common *event_enabler);
+
static void syscall_entry_event_unknown(struct hlist_head *unknown_action_list_head,
struct pt_regs *regs, long id)
{
return 0;
}
-/*
- * Should be called with sessions lock held.
- */
-int lttng_syscalls_register_event(struct lttng_event_recorder_enabler *syscall_event_enabler)
+static
+int lttng_syscalls_populate_events(struct lttng_event_enabler_common *syscall_event_enabler)
{
- struct lttng_kernel_syscall_table *syscall_table = get_syscall_table_from_enabler(&syscall_event_enabler->parent);
+ struct lttng_kernel_syscall_table *syscall_table = get_syscall_table_from_enabler(syscall_event_enabler);
+ struct lttng_event_recorder_enabler *event_recorder_enabler;
+ struct lttng_kernel_channel_buffer *chan;
struct lttng_kernel_abi_event ev;
int ret;
- wrapper_vmalloc_sync_mappings();
-
- if (!syscall_table->syscall_dispatch) {
- /* create syscall table mapping syscall to events */
- syscall_table->syscall_dispatch = kzalloc(sizeof(struct hlist_head) * sc_table.len, GFP_KERNEL);
- if (!syscall_table->syscall_dispatch)
- return -ENOMEM;
- }
- if (!syscall_table->syscall_exit_dispatch) {
- /* create syscall table mapping syscall to events */
- syscall_table->syscall_exit_dispatch = kzalloc(sizeof(struct hlist_head) * sc_exit_table.len, GFP_KERNEL);
- if (!syscall_table->syscall_exit_dispatch)
- return -ENOMEM;
- }
-
-
-#ifdef CONFIG_COMPAT
- if (!syscall_table->compat_syscall_dispatch) {
- /* create syscall table mapping compat syscall to events */
- syscall_table->compat_syscall_dispatch = kzalloc(sizeof(struct hlist_head) * compat_sc_table.len, GFP_KERNEL);
- if (!syscall_table->compat_syscall_dispatch)
- return -ENOMEM;
- }
+ if (syscall_event_enabler->enabler_type != LTTNG_EVENT_ENABLER_TYPE_RECORDER)
+ return 0;
+ event_recorder_enabler = container_of(syscall_event_enabler, struct lttng_event_recorder_enabler, parent);
+ chan = event_recorder_enabler->chan;
- if (!syscall_table->compat_syscall_exit_dispatch) {
- /* create syscall table mapping compat syscall to events */
- syscall_table->compat_syscall_exit_dispatch = kzalloc(sizeof(struct hlist_head) * compat_sc_exit_table.len, GFP_KERNEL);
- if (!syscall_table->compat_syscall_exit_dispatch)
- return -ENOMEM;
- }
-#endif
if (hlist_empty(&syscall_table->unknown_syscall_dispatch)) {
const struct lttng_kernel_event_desc *desc =
&__event_desc___syscall_entry_unknown;
ev.instrumentation = LTTNG_KERNEL_ABI_SYSCALL;
ev.u.syscall.entryexit = LTTNG_KERNEL_ABI_SYSCALL_ENTRY;
ev.u.syscall.abi = LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE;
- event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev, syscall_event_enabler->chan);
+ event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev, chan);
if (!event_enabler) {
return -ENOMEM;
}
ev.instrumentation = LTTNG_KERNEL_ABI_SYSCALL;
ev.u.syscall.entryexit = LTTNG_KERNEL_ABI_SYSCALL_ENTRY;
ev.u.syscall.abi = LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT;
- event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev, syscall_event_enabler->chan);
+ event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev, chan);
if (!event_enabler) {
return -ENOMEM;
}
ev.instrumentation = LTTNG_KERNEL_ABI_SYSCALL;
ev.u.syscall.entryexit = LTTNG_KERNEL_ABI_SYSCALL_EXIT;
ev.u.syscall.abi = LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT;
- event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev, syscall_event_enabler->chan);
+ event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev, chan);
if (!event_enabler) {
return -ENOMEM;
}
ev.instrumentation = LTTNG_KERNEL_ABI_SYSCALL;
ev.u.syscall.entryexit = LTTNG_KERNEL_ABI_SYSCALL_EXIT;
ev.u.syscall.abi = LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE;
- event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev, syscall_event_enabler->chan);
+ event_enabler = lttng_event_recorder_enabler_create(LTTNG_ENABLER_FORMAT_NAME, &ev, chan);
if (!event_enabler) {
return -ENOMEM;
}
}
ret = lttng_create_syscall_event_if_missing(sc_table.table, sc_table.len,
- syscall_table->syscall_dispatch, syscall_event_enabler, SC_TYPE_ENTRY);
+ syscall_table->syscall_dispatch, event_recorder_enabler, SC_TYPE_ENTRY);
if (ret)
return ret;
ret = lttng_create_syscall_event_if_missing(sc_exit_table.table, sc_exit_table.len,
- syscall_table->syscall_exit_dispatch, syscall_event_enabler, SC_TYPE_EXIT);
+ syscall_table->syscall_exit_dispatch, event_recorder_enabler, SC_TYPE_EXIT);
if (ret)
return ret;
#ifdef CONFIG_COMPAT
ret = lttng_create_syscall_event_if_missing(compat_sc_table.table, compat_sc_table.len,
- syscall_table->compat_syscall_dispatch, syscall_event_enabler, SC_TYPE_COMPAT_ENTRY);
+ syscall_table->compat_syscall_dispatch, event_recorder_enabler, SC_TYPE_COMPAT_ENTRY);
if (ret)
return ret;
ret = lttng_create_syscall_event_if_missing(compat_sc_exit_table.table, compat_sc_exit_table.len,
- syscall_table->compat_syscall_exit_dispatch, syscall_event_enabler, SC_TYPE_COMPAT_EXIT);
+ syscall_table->compat_syscall_exit_dispatch, event_recorder_enabler, SC_TYPE_COMPAT_EXIT);
if (ret)
return ret;
#endif
-
- if (!syscall_table->sc_filter) {
- syscall_table->sc_filter = kzalloc(sizeof(struct lttng_syscall_filter),
- GFP_KERNEL);
- if (!syscall_table->sc_filter)
- return -ENOMEM;
- }
-
- if (!syscall_table->sys_enter_registered) {
- ret = lttng_wrapper_tracepoint_probe_register("sys_enter",
- (void *) syscall_entry_event_probe, syscall_table);
- if (ret)
- return ret;
- syscall_table->sys_enter_registered = 1;
- }
- /*
- * We change the name of sys_exit tracepoint due to namespace
- * conflict with sys_exit syscall entry.
- */
- if (!syscall_table->sys_exit_registered) {
- ret = lttng_wrapper_tracepoint_probe_register("sys_exit",
- (void *) syscall_exit_event_probe, syscall_table);
- if (ret) {
- WARN_ON_ONCE(lttng_wrapper_tracepoint_probe_unregister("sys_enter",
- (void *) syscall_entry_event_probe, syscall_table));
- return ret;
- }
- syscall_table->sys_exit_registered = 1;
- }
return ret;
}
/*
* Should be called with sessions lock held.
*/
-int lttng_syscalls_register_event_notifier(
- struct lttng_event_notifier_enabler *event_notifier_enabler)
+int lttng_syscalls_register_event(struct lttng_event_enabler_common *syscall_event_enabler)
{
- struct lttng_event_notifier_group *group = event_notifier_enabler->group;
- struct lttng_kernel_syscall_table *syscall_table = &group->syscall_table;
- int ret = 0;
-
- wrapper_vmalloc_sync_mappings();
+ struct lttng_kernel_syscall_table *syscall_table = get_syscall_table_from_enabler(syscall_event_enabler);
+ int ret;
if (!syscall_table->syscall_dispatch) {
+ /* create syscall table mapping syscall to events */
syscall_table->syscall_dispatch = kzalloc(sizeof(struct hlist_head) * sc_table.len, GFP_KERNEL);
if (!syscall_table->syscall_dispatch)
return -ENOMEM;
}
-
if (!syscall_table->syscall_exit_dispatch) {
- syscall_table->syscall_exit_dispatch = kzalloc(sizeof(struct hlist_head) * sc_table.len, GFP_KERNEL);
+ /* create syscall table mapping syscall to events */
+ syscall_table->syscall_exit_dispatch = kzalloc(sizeof(struct hlist_head) * sc_exit_table.len, GFP_KERNEL);
if (!syscall_table->syscall_exit_dispatch)
return -ENOMEM;
}
+
#ifdef CONFIG_COMPAT
if (!syscall_table->compat_syscall_dispatch) {
+ /* create syscall table mapping compat syscall to events */
syscall_table->compat_syscall_dispatch = kzalloc(sizeof(struct hlist_head) * compat_sc_table.len, GFP_KERNEL);
if (!syscall_table->compat_syscall_dispatch)
return -ENOMEM;
}
if (!syscall_table->compat_syscall_exit_dispatch) {
- syscall_table->compat_syscall_exit_dispatch =
- kzalloc(sizeof(struct hlist_head) * compat_sc_exit_table.len,
- GFP_KERNEL);
+ /* create syscall table mapping compat syscall to events */
+ syscall_table->compat_syscall_exit_dispatch = kzalloc(sizeof(struct hlist_head) * compat_sc_exit_table.len, GFP_KERNEL);
if (!syscall_table->compat_syscall_exit_dispatch)
return -ENOMEM;
}
#endif
-
if (!syscall_table->sc_filter) {
syscall_table->sc_filter = kzalloc(sizeof(struct lttng_syscall_filter),
GFP_KERNEL);
return -ENOMEM;
}
+ ret = lttng_syscalls_populate_events(syscall_event_enabler);
+ if (ret)
+ return ret;
+
+ wrapper_vmalloc_sync_mappings();
+
if (!syscall_table->sys_enter_registered) {
ret = lttng_wrapper_tracepoint_probe_register("sys_enter",
(void *) syscall_entry_event_probe, syscall_table);
return ret;
syscall_table->sys_enter_registered = 1;
}
-
if (!syscall_table->sys_exit_registered) {
ret = lttng_wrapper_tracepoint_probe_register("sys_exit",
(void *) syscall_exit_event_probe, syscall_table);
syscall_table->sys_exit_registered = 1;
}
+ ret = lttng_syscalls_create_matching_event_notifiers(syscall_event_enabler);
+ if (ret)
+ return ret;
+
return ret;
}
/*
* Check if already created.
*/
- head = utils_borrow_hash_table_bucket(group->event_notifiers_ht.table,
- LTTNG_EVENT_NOTIFIER_HT_SIZE, desc->event_name);
+ head = utils_borrow_hash_table_bucket(group->events_ht.table,
+ LTTNG_EVENT_HT_SIZE, desc->event_name);
lttng_hlist_for_each_entry(event_notifier_priv, head, hlist) {
if (event_notifier_priv->parent.desc == desc &&
event_notifier_priv->parent.user_token == base_enabler->user_token)
/*
* Check if already created.
*/
- head = utils_borrow_hash_table_bucket(group->event_notifiers_ht.table,
- LTTNG_EVENT_NOTIFIER_HT_SIZE, desc->event_name);
+ head = utils_borrow_hash_table_bucket(group->events_ht.table,
+ LTTNG_EVENT_HT_SIZE, desc->event_name);
lttng_hlist_for_each_entry(event_notifier_priv, head, hlist) {
if (event_notifier_priv->parent.desc == desc
&& event_notifier_priv->parent.user_token == event_notifier_enabler->parent.user_token)
}
-int lttng_syscalls_create_matching_event_notifiers(
- struct lttng_event_notifier_enabler *event_notifier_enabler)
+static
+int lttng_syscalls_create_matching_event_notifiers(struct lttng_event_enabler_common *event_enabler)
{
int ret;
- struct lttng_event_enabler_common *base_enabler =
- lttng_event_notifier_enabler_as_enabler(event_notifier_enabler);
enum lttng_kernel_abi_syscall_entryexit entryexit =
- base_enabler->event_param.u.syscall.entryexit;
+ event_enabler->event_param.u.syscall.entryexit;
+ struct lttng_event_notifier_enabler *event_notifier_enabler;
+
+ if (event_enabler->enabler_type != LTTNG_EVENT_ENABLER_TYPE_NOTIFIER)
+ return 0;
+ event_notifier_enabler = container_of(event_enabler, struct lttng_event_notifier_enabler, parent);
if (entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRY || entryexit == LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT) {
ret = create_matching_event_notifiers(event_notifier_enabler,
return ret;
}
-/*
- * Unregister the syscall event_notifier probes from the callsites.
- */
-int lttng_syscalls_unregister_event_notifier_group(
- struct lttng_event_notifier_group *event_notifier_group)
+int lttng_syscalls_unregister_syscall_table(struct lttng_kernel_syscall_table *syscall_table)
{
- struct lttng_kernel_syscall_table *syscall_table = &event_notifier_group->syscall_table;
- int ret;
-
- /*
- * Only register the event_notifier probe on the `sys_enter` callsite for now.
- * At the moment, we don't think it's desirable to have one fired
- * event_notifier for the entry and one for the exit of a syscall.
- */
- if (syscall_table->sys_enter_registered) {
- ret = lttng_wrapper_tracepoint_probe_unregister("sys_enter",
- (void *) syscall_entry_event_probe, syscall_table);
- if (ret)
- return ret;
- syscall_table->sys_enter_registered = 0;
- }
- if (syscall_table->sys_exit_registered) {
- ret = lttng_wrapper_tracepoint_probe_unregister("sys_exit",
- (void *) syscall_exit_event_probe, syscall_table);
- if (ret)
- return ret;
- syscall_table->sys_enter_registered = 0;
- }
-
- kfree(syscall_table->syscall_dispatch);
- kfree(syscall_table->syscall_exit_dispatch);
-#ifdef CONFIG_COMPAT
- kfree(syscall_table->compat_syscall_dispatch);
- kfree(syscall_table->compat_syscall_exit_dispatch);
-#endif
- return 0;
-}
-
-int lttng_syscalls_unregister_channel(struct lttng_kernel_channel_buffer *chan)
-{
- struct lttng_kernel_syscall_table *syscall_table = &chan->priv->parent.syscall_table;
int ret;
if (!syscall_table->syscall_dispatch)
return 0;
}
-int lttng_syscalls_destroy_channel(struct lttng_kernel_channel_buffer *chan)
+int lttng_syscalls_destroy_syscall_table(struct lttng_kernel_syscall_table *syscall_table)
{
- struct lttng_kernel_syscall_table *syscall_table = &chan->priv->parent.syscall_table;
-
kfree(syscall_table->syscall_dispatch);
kfree(syscall_table->syscall_exit_dispatch);
#ifdef CONFIG_COMPAT
return 0;
}
-int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
+int lttng_syscall_filter_enable_event(struct lttng_kernel_event_common *event)
{
- struct lttng_event_notifier_group *group = event_notifier->priv->group;
- struct lttng_kernel_syscall_table *syscall_table = &group->syscall_table;
- unsigned int syscall_id = event_notifier->priv->parent.u.syscall.syscall_id;
- struct hlist_head *dispatch_list;
- int ret = 0;
+ struct lttng_kernel_syscall_table *syscall_table = get_syscall_table_from_event(event);
+ int ret;
- WARN_ON_ONCE(event_notifier->priv->parent.instrumentation != LTTNG_KERNEL_ABI_SYSCALL);
+ WARN_ON_ONCE(event->priv->instrumentation != LTTNG_KERNEL_ABI_SYSCALL);
ret = lttng_syscall_filter_enable(syscall_table->sc_filter,
- event_notifier->priv->parent.desc->event_name,
- event_notifier->priv->parent.u.syscall.abi,
- event_notifier->priv->parent.u.syscall.entryexit);
- if (ret) {
- goto end;
- }
+ event->priv->desc->event_name, event->priv->u.syscall.abi,
+ event->priv->u.syscall.entryexit);
+ if (ret)
+ return ret;
- switch (event_notifier->priv->parent.u.syscall.entryexit) {
- case LTTNG_SYSCALL_ENTRY:
- switch (event_notifier->priv->parent.u.syscall.abi) {
- case LTTNG_SYSCALL_ABI_NATIVE:
- dispatch_list = &syscall_table->syscall_dispatch[syscall_id];
- break;
- case LTTNG_SYSCALL_ABI_COMPAT:
- dispatch_list = &syscall_table->compat_syscall_dispatch[syscall_id];
- break;
- default:
- ret = -EINVAL;
- goto end;
- }
+ switch (event->type) {
+ case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
break;
- case LTTNG_SYSCALL_EXIT:
- switch (event_notifier->priv->parent.u.syscall.abi) {
- case LTTNG_SYSCALL_ABI_NATIVE:
- dispatch_list = &syscall_table->syscall_exit_dispatch[syscall_id];
+ case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
+ {
+ unsigned int syscall_id = event->priv->u.syscall.syscall_id;
+ struct hlist_head *dispatch_list;
+
+ switch (event->priv->u.syscall.entryexit) {
+ case LTTNG_SYSCALL_ENTRY:
+ switch (event->priv->u.syscall.abi) {
+ case LTTNG_SYSCALL_ABI_NATIVE:
+ dispatch_list = &syscall_table->syscall_dispatch[syscall_id];
+ break;
+ case LTTNG_SYSCALL_ABI_COMPAT:
+ dispatch_list = &syscall_table->compat_syscall_dispatch[syscall_id];
+ break;
+ default:
+ ret = -EINVAL;
+ goto end;
+ }
break;
- case LTTNG_SYSCALL_ABI_COMPAT:
- dispatch_list = &syscall_table->compat_syscall_exit_dispatch[syscall_id];
+ case LTTNG_SYSCALL_EXIT:
+ switch (event->priv->u.syscall.abi) {
+ case LTTNG_SYSCALL_ABI_NATIVE:
+ dispatch_list = &syscall_table->syscall_exit_dispatch[syscall_id];
+ break;
+ case LTTNG_SYSCALL_ABI_COMPAT:
+ dispatch_list = &syscall_table->compat_syscall_exit_dispatch[syscall_id];
+ break;
+ default:
+ ret = -EINVAL;
+ goto end;
+ }
break;
default:
ret = -EINVAL;
goto end;
}
+
+ hlist_add_head_rcu(&event->priv->u.syscall.node, dispatch_list);
break;
+ }
default:
- ret = -EINVAL;
- goto end;
+ WARN_ON_ONCE(1);
+ return -ENOSYS;
}
-
- hlist_add_head_rcu(&event_notifier->priv->parent.u.syscall.node, dispatch_list);
-
end:
- return ret ;
-}
-
-int lttng_syscall_filter_enable_event_recorder(struct lttng_kernel_event_recorder *event_recorder)
-{
- struct lttng_kernel_channel_buffer *channel = event_recorder->chan;
- struct lttng_kernel_syscall_table *syscall_table = &channel->priv->parent.syscall_table;
-
- WARN_ON_ONCE(event_recorder->priv->parent.instrumentation != LTTNG_KERNEL_ABI_SYSCALL);
-
- return lttng_syscall_filter_enable(syscall_table->sc_filter,
- event_recorder->priv->parent.desc->event_name,
- event_recorder->priv->parent.u.syscall.abi,
- event_recorder->priv->parent.u.syscall.entryexit);
+ return ret;
}
static
return 0;
}
-int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
+int lttng_syscall_filter_disable_event(struct lttng_kernel_event_common *event)
{
- struct lttng_event_notifier_group *group = event_notifier->priv->group;
- struct lttng_kernel_syscall_table *syscall_table = &group->syscall_table;
+ struct lttng_kernel_syscall_table *syscall_table = get_syscall_table_from_event(event);
int ret;
- WARN_ON_ONCE(event_notifier->priv->parent.instrumentation != LTTNG_KERNEL_ABI_SYSCALL);
-
ret = lttng_syscall_filter_disable(syscall_table->sc_filter,
- event_notifier->priv->parent.desc->event_name,
- event_notifier->priv->parent.u.syscall.abi,
- event_notifier->priv->parent.u.syscall.entryexit);
- WARN_ON_ONCE(ret != 0);
+ event->priv->desc->event_name, event->priv->u.syscall.abi,
+ event->priv->u.syscall.entryexit);
+ if (ret)
+ return ret;
- hlist_del_rcu(&event_notifier->priv->parent.u.syscall.node);
+ switch (event->type) {
+ case LTTNG_KERNEL_EVENT_TYPE_RECORDER:
+ break;
+ case LTTNG_KERNEL_EVENT_TYPE_NOTIFIER:
+ {
+ hlist_del_rcu(&event->priv->u.syscall.node);
+ break;
+ }
+ default:
+ WARN_ON_ONCE(1);
+ return -ENOSYS;
+ }
return 0;
}
-int lttng_syscall_filter_disable_event_recorder(struct lttng_kernel_event_recorder *event_recorder)
-{
- struct lttng_kernel_channel_buffer *channel = event_recorder->chan;
- struct lttng_kernel_syscall_table *syscall_table = &channel->priv->parent.syscall_table;
-
- return lttng_syscall_filter_disable(syscall_table->sc_filter,
- event_recorder->priv->parent.desc->event_name,
- event_recorder->priv->parent.u.syscall.abi,
- event_recorder->priv->parent.u.syscall.entryexit);
-}
-
static
const struct trace_syscall_entry *syscall_list_get_entry(loff_t *pos)
{
/*
* A syscall is enabled if it is traced for either entry or exit.
*/
-long lttng_channel_syscall_mask(struct lttng_kernel_channel_buffer *channel,
+long lttng_syscall_table_get_active_mask(struct lttng_kernel_syscall_table *syscall_table,
struct lttng_kernel_abi_syscall_mask __user *usyscall_mask)
{
- struct lttng_kernel_syscall_table *syscall_table = &channel->priv->parent.syscall_table;
uint32_t len, sc_tables_len, bitmask_len;
int ret = 0, bit;
char *tmp_mask;
projects / lttng-modules.git / blobdiff