#ifndef _LTTNG_EVENTS_INTERNAL_H
#define _LTTNG_EVENTS_INTERNAL_H
+#include <wrapper/compiler_attributes.h>
+
#include <lttng/events.h>
+struct lttng_syscall_filter;
+struct lttng_metadata_cache;
+struct perf_event;
+struct perf_event_attr;
+struct lttng_kernel_ring_buffer_config;
+
+enum lttng_enabler_format_type {
+ LTTNG_ENABLER_FORMAT_STAR_GLOB,
+ LTTNG_ENABLER_FORMAT_NAME,
+};
+
+enum channel_type {
+ PER_CPU_CHANNEL,
+ METADATA_CHANNEL,
+};
+
+/*
+ * Objects in a linked-list of enablers, owned by an event.
+ */
+struct lttng_enabler_ref {
+ struct list_head node; /* enabler ref list */
+ struct lttng_event_enabler_common *ref; /* backward ref */
+};
+
+struct lttng_krp; /* Kretprobe handling */
+
+struct lttng_uprobe_handler {
+ struct lttng_kernel_event_common *event;
+ loff_t offset;
+ struct uprobe_consumer up_consumer;
+ struct list_head node;
+};
+
+struct lttng_kprobe {
+ struct kprobe kp;
+ char *symbol_name;
+};
+
+struct lttng_uprobe {
+ struct inode *inode;
+ struct list_head head;
+};
+
+enum lttng_syscall_entryexit {
+ LTTNG_SYSCALL_ENTRY,
+ LTTNG_SYSCALL_EXIT,
+};
+
+enum lttng_syscall_abi {
+ LTTNG_SYSCALL_ABI_NATIVE,
+ LTTNG_SYSCALL_ABI_COMPAT,
+};
+
struct lttng_kernel_event_common_private {
struct lttng_kernel_event_common *pub; /* Public event interface */
};
+struct lttng_kernel_syscall_table {
+ unsigned int sys_enter_registered:1,
+ sys_exit_registered:1;
+
+ struct hlist_head *syscall_dispatch; /* for syscall tracing */
+ struct hlist_head *compat_syscall_dispatch;
+ struct hlist_head *syscall_exit_dispatch; /* for syscall exit tracing */
+ struct hlist_head *compat_syscall_exit_dispatch;
+
+ /*
+ * Combining all unknown syscall events works as long as they
+ * are only matched by "all" syscalls enablers, but will require
+ * a design change when we allow matching by syscall number, for
+ * instance by allocating sc_tables accomodating NR_syscalls
+ * entries.
+ */
+ struct hlist_head unknown_syscall_dispatch; /* for unknown syscalls */
+ struct hlist_head compat_unknown_syscall_dispatch;
+ struct hlist_head unknown_syscall_exit_dispatch;
+ struct hlist_head compat_unknown_syscall_exit_dispatch;
+
+ struct lttng_syscall_filter *sc_filter;
+ int syscall_all_entry;
+ int syscall_all_exit;
+};
+
+struct lttng_kernel_channel_common_private {
+ struct lttng_kernel_channel_common *pub;
+
+ struct file *file; /* File associated to channel */
+ unsigned int tstate:1; /* Transient enable state */
+
+ struct lttng_kernel_syscall_table syscall_table;
+};
+
+struct lttng_kernel_channel_buffer_private {
+ struct lttng_kernel_channel_common_private parent;
+
+ struct lttng_kernel_channel_buffer *pub;
+
+ unsigned int id; /* Channel ID */
+ unsigned int free_event_id; /* Next event ID to allocate */
+ int header_type; /* 0: unset, 1: compact, 2: large */
+
+ enum channel_type channel_type;
+ struct lttng_kernel_ctx *ctx;
+ struct lttng_kernel_ring_buffer_channel *rb_chan; /* Ring buffer channel */
+ unsigned int metadata_dumped:1;
+ struct list_head node; /* Channel list in session */
+ struct lttng_transport *transport;
+};
+
+enum lttng_kernel_bytecode_interpreter_ret {
+ LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1,
+ LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0,
+};
+
+enum lttng_kernel_bytecode_filter_result {
+ LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0,
+ LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1,
+};
+
+struct lttng_kernel_bytecode_filter_ctx {
+ enum lttng_kernel_bytecode_filter_result result;
+};
+
+struct lttng_interpreter_output;
+
+enum lttng_kernel_bytecode_type {
+ LTTNG_KERNEL_BYTECODE_TYPE_FILTER,
+ LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE,
+};
+
+enum lttng_kernel_event_enabler_type {
+ LTTNG_EVENT_ENABLER_TYPE_RECORDER,
+ LTTNG_EVENT_ENABLER_TYPE_NOTIFIER,
+};
+
+struct lttng_kernel_bytecode_node {
+ enum lttng_kernel_bytecode_type type;
+ struct list_head node;
+ struct lttng_event_enabler_common *enabler;
+ struct {
+ uint32_t len;
+ uint32_t reloc_offset;
+ uint64_t seqnum;
+ char data[];
+ } bc;
+};
+
+struct lttng_kernel_bytecode_runtime {
+ /* Associated bytecode */
+ enum lttng_kernel_bytecode_type type;
+ struct lttng_kernel_bytecode_node *bc;
+ int (*interpreter_func)(struct lttng_kernel_bytecode_runtime *kernel_bytecode,
+ const char *interpreter_stack_data,
+ struct lttng_kernel_probe_ctx *lttng_probe_ctx,
+ void *caller_ctx);
+ int link_failed;
+ struct list_head node; /* list of bytecode runtime in event */
+ struct lttng_kernel_ctx *ctx;
+};
+
+/*
+ * Enabler field, within whatever object is enabling an event. Target of
+ * backward reference.
+ */
+struct lttng_event_enabler_common {
+ enum lttng_kernel_event_enabler_type enabler_type;
+ enum lttng_enabler_format_type format_type;
+
+ /* head list of struct lttng_kernel_bytecode_node */
+ struct list_head filter_bytecode_head;
+
+ struct lttng_kernel_abi_event event_param;
+ unsigned int enabled:1;
+
+ uint64_t user_token; /* User-provided token. */
+};
+
+struct lttng_event_recorder_enabler {
+ struct lttng_event_enabler_common parent;
+ struct list_head node; /* per-session list of enablers */
+ bool published; /* published in per-session list. */
+ struct lttng_kernel_channel_buffer *chan;
+};
+
+struct lttng_event_notifier_enabler {
+ struct lttng_event_enabler_common parent;
+ uint64_t error_counter_index;
+ struct list_head node; /* List of event_notifier enablers */
+ struct lttng_event_notifier_group *group;
+
+ /* head list of struct lttng_kernel_bytecode_node */
+ struct list_head capture_bytecode_head;
+ uint64_t num_captures;
+};
+
+struct lttng_ctx_value {
+ union {
+ int64_t s64;
+ const char *str;
+ double d;
+ } u;
+};
+
+/*
+ * We need to keep this perf counter field separately from struct
+ * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
+ */
+struct lttng_perf_counter_field {
+#if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
+ struct lttng_cpuhp_node cpuhp_prepare;
+ struct lttng_cpuhp_node cpuhp_online;
+#else
+ struct notifier_block nb;
+ int hp_enable;
+#endif
+ struct perf_event_attr *attr;
+ struct perf_event **e; /* per-cpu array */
+ char *name;
+ struct lttng_kernel_event_field *event_field;
+};
+
+struct lttng_kernel_ctx_field {
+ const struct lttng_kernel_event_field *event_field;
+ size_t (*get_size)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
+ size_t offset);
+ void (*record)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
+ struct lttng_kernel_ring_buffer_ctx *ctx,
+ struct lttng_kernel_channel_buffer *chan);
+ void (*get_value)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
+ struct lttng_ctx_value *value);
+ void (*destroy)(void *priv);
+ void *priv;
+};
+
+struct lttng_kernel_ctx {
+ struct lttng_kernel_ctx_field *fields;
+ unsigned int nr_fields;
+ unsigned int allocated_fields;
+ size_t largest_align; /* in bytes */
+};
+
+struct lttng_metadata_cache {
+ char *data; /* Metadata cache */
+ unsigned int cache_alloc; /* Metadata allocated size (bytes) */
+ unsigned int metadata_written; /* Number of bytes written in metadata cache */
+ atomic_t producing; /* Metadata being produced (incomplete) */
+ struct kref refcount; /* Metadata cache usage */
+ struct list_head metadata_stream; /* Metadata stream list */
+ uuid_le uuid; /* Trace session unique ID (copy) */
+ struct mutex lock; /* Produce/consume lock */
+ uint64_t version; /* Current version of the metadata */
+};
+
+struct lttng_metadata_stream {
+ void *priv; /* Ring buffer private data */
+ struct lttng_metadata_cache *metadata_cache;
+ unsigned int metadata_in; /* Bytes read from the cache */
+ unsigned int metadata_out; /* Bytes consumed from stream */
+ int finalized; /* Has channel been finalized */
+ wait_queue_head_t read_wait; /* Reader buffer-level wait queue */
+ struct list_head list; /* Stream list */
+ struct lttng_transport *transport;
+ uint64_t version; /* Current version of the metadata cache */
+ bool coherent; /* Stream in a coherent state */
+};
+
+struct lttng_kernel_channel_buffer_ops_private {
+ struct lttng_kernel_channel_buffer_ops *pub; /* Public channel buffer ops interface */
+
+ struct lttng_kernel_ring_buffer_channel *(*channel_create)(const char *name,
+ void *priv,
+ void *buf_addr,
+ size_t subbuf_size, size_t num_subbuf,
+ unsigned int switch_timer_interval,
+ unsigned int read_timer_interval);
+ void (*channel_destroy)(struct lttng_kernel_ring_buffer_channel *chan);
+ struct lttng_kernel_ring_buffer *(*buffer_read_open)(struct lttng_kernel_ring_buffer_channel *chan);
+ int (*buffer_has_read_closed_stream)(struct lttng_kernel_ring_buffer_channel *chan);
+ void (*buffer_read_close)(struct lttng_kernel_ring_buffer *buf);
+ /*
+ * packet_avail_size returns the available size in the current
+ * packet. Note that the size returned is only a hint, since it
+ * may change due to concurrent writes.
+ */
+ size_t (*packet_avail_size)(struct lttng_kernel_ring_buffer_channel *chan);
+ wait_queue_head_t *(*get_writer_buf_wait_queue)(struct lttng_kernel_ring_buffer_channel *chan, int cpu);
+ wait_queue_head_t *(*get_hp_wait_queue)(struct lttng_kernel_ring_buffer_channel *chan);
+ int (*is_finalized)(struct lttng_kernel_ring_buffer_channel *chan);
+ int (*is_disabled)(struct lttng_kernel_ring_buffer_channel *chan);
+ int (*timestamp_begin) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *timestamp_begin);
+ int (*timestamp_end) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *timestamp_end);
+ int (*events_discarded) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *events_discarded);
+ int (*content_size) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *content_size);
+ int (*packet_size) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *packet_size);
+ int (*stream_id) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *stream_id);
+ int (*current_timestamp) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *ts);
+ int (*sequence_number) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *seq);
+ int (*instance_id) (const struct lttng_kernel_ring_buffer_config *config,
+ struct lttng_kernel_ring_buffer *bufb,
+ uint64_t *id);
+};
+
+struct lttng_counter_ops {
+ struct lib_counter *(*counter_create)(size_t nr_dimensions,
+ const size_t *max_nr_elem, /* for each dimension */
+ int64_t global_sum_step);
+ void (*counter_destroy)(struct lib_counter *counter);
+ int (*counter_add)(struct lib_counter *counter, const size_t *dimension_indexes,
+ int64_t v);
+ /*
+ * counter_read reads a specific cpu's counter if @cpu >= 0, or
+ * the global aggregation counter if @cpu == -1.
+ */
+ int (*counter_read)(struct lib_counter *counter, const size_t *dimension_indexes, int cpu,
+ int64_t *value, bool *overflow, bool *underflow);
+ /*
+ * counter_aggregate returns the total sum of all per-cpu counters and
+ * the global aggregation counter.
+ */
+ int (*counter_aggregate)(struct lib_counter *counter, const size_t *dimension_indexes,
+ int64_t *value, bool *overflow, bool *underflow);
+ int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes);
+};
+
+struct lttng_counter {
+ struct file *file; /* File associated to counter. */
+ struct file *owner;
+ struct lttng_counter_transport *transport;
+ struct lib_counter *counter;
+ struct lttng_counter_ops *ops;
+};
+
+#define LTTNG_EVENT_NOTIFIER_HT_BITS 12
+#define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
+
+struct lttng_event_notifier_ht {
+ struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE];
+};
+
+struct lttng_event_notifier_group {
+ struct file *file; /* File associated to event notifier group */
+ struct file *notif_file; /* File used to expose notifications to userspace. */
+ struct list_head node; /* event notifier group list */
+ struct list_head enablers_head; /* List of enablers */
+ struct list_head event_notifiers_head; /* List of event notifier */
+ struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */
+ struct lttng_kernel_channel_buffer_ops *ops;
+ struct lttng_transport *transport;
+ struct lttng_kernel_ring_buffer_channel *chan; /* Ring buffer channel for event notifier group. */
+ struct lttng_kernel_ring_buffer *buf; /* Ring buffer for event notifier group. */
+ wait_queue_head_t read_wait;
+ struct irq_work wakeup_pending; /* Pending wakeup irq work. */
+
+ struct lttng_kernel_syscall_table syscall_table;
+
+ struct lttng_counter *error_counter;
+ size_t error_counter_len;
+};
+
+struct lttng_transport {
+ char *name;
+ struct module *owner;
+ struct list_head node;
+ struct lttng_kernel_channel_buffer_ops ops;
+};
+
+struct lttng_counter_transport {
+ char *name;
+ struct module *owner;
+ struct list_head node;
+ struct lttng_counter_ops ops;
+};
+
+#define LTTNG_EVENT_HT_BITS 12
+#define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
+
+struct lttng_event_ht {
+ struct hlist_head table[LTTNG_EVENT_HT_SIZE];
+};
+
+struct lttng_kernel_session_private {
+ struct lttng_kernel_session *pub; /* Public session interface */
+
+ int been_active; /* Has trace session been active ? */
+ struct file *file; /* File associated to session */
+ struct list_head chan; /* Channel list head */
+ struct list_head events; /* Event list head */
+ struct list_head list; /* Session list */
+ unsigned int free_chan_id; /* Next chan ID to allocate */
+ uuid_le uuid; /* Trace session unique ID */
+ struct lttng_metadata_cache *metadata_cache;
+ unsigned int metadata_dumped:1,
+ tstate:1; /* Transient enable state */
+ /* List of event enablers */
+ struct list_head enablers_head;
+ /* Hash table of events */
+ struct lttng_event_ht events_ht;
+ char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN];
+ char creation_time[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN];
+};
+
+struct lttng_id_hash_node {
+ struct hlist_node hlist;
+ int id;
+};
+
+enum tracker_type {
+ TRACKER_PID,
+ TRACKER_VPID,
+ TRACKER_UID,
+ TRACKER_VUID,
+ TRACKER_GID,
+ TRACKER_VGID,
+
+ TRACKER_UNKNOWN,
+};
+
+struct lttng_kernel_id_tracker_private {
+ struct lttng_kernel_id_tracker *pub; /* Public interface */
+
+ struct lttng_kernel_session *session;
+ enum tracker_type tracker_type;
+};
+
+extern struct lttng_kernel_ctx *lttng_static_ctx;
+
static inline
const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type)
{
if (!type_integer)
return false;
switch (type_integer->size) {
- case 8: /* Fall-through. */
- case 16: /* Fall-through. */
- case 32: /* Fall-through. */
+ case 8:
+ lttng_fallthrough;
+ case 16:
+ lttng_fallthrough;
+ case 32:
+ lttng_fallthrough;
case 64:
break;
default:
return true;
}
+int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event,
+ const char *interpreter_stack_data,
+ struct lttng_kernel_probe_ctx *probe_ctx,
+ void *event_filter_ctx);
+
+static inline
+struct lttng_event_enabler_common *lttng_event_recorder_enabler_as_enabler(
+ struct lttng_event_recorder_enabler *event_recorder_enabler)
+{
+ return &event_recorder_enabler->parent;
+}
+
+static inline
+struct lttng_event_enabler_common *lttng_event_notifier_enabler_as_enabler(
+ struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ return &event_notifier_enabler->parent;
+}
+
+int lttng_context_init(void);
+void lttng_context_exit(void);
+int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p,
+ const struct lttng_kernel_ctx_field *f);
+void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p);
+struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx,
+ size_t index);
+int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name);
+int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name);
+void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx);
+int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx);
+#if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
+int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+#ifdef CONFIG_PREEMPT_RT_FULL
+int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type);
+
+#if defined(CONFIG_CGROUPS) && \
+ ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
+ LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
+int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_IPC_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_NET_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_PID_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_USER_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_UTS_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
+int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+#if defined(CONFIG_TIME_NS) && \
+ (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0) || \
+ LTTNG_RHEL_KERNEL_RANGE(4,18,0,305,0,0, 4,19,0,0,0,0))
+int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx);
+#else
+static inline
+int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+#endif
+
+int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx);
+int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx);
+
+#if defined(CONFIG_PERF_EVENTS)
+int lttng_add_perf_counter_to_ctx(uint32_t type,
+ uint64_t config,
+ const char *name,
+ struct lttng_kernel_ctx **ctx);
+int lttng_cpuhp_perf_counter_online(unsigned int cpu,
+ struct lttng_cpuhp_node *node);
+int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
+ struct lttng_cpuhp_node *node);
+#else
+static inline
+int lttng_add_perf_counter_to_ctx(uint32_t type,
+ uint64_t config,
+ const char *name,
+ struct lttng_kernel_ctx **ctx)
+{
+ return -ENOSYS;
+}
+static inline
+int lttng_cpuhp_perf_counter_online(unsigned int cpu,
+ struct lttng_cpuhp_node *node)
+{
+ return 0;
+}
+static inline
+int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
+ struct lttng_cpuhp_node *node)
+{
+ return 0;
+}
+#endif
+
+struct lttng_event_recorder_enabler *lttng_event_recorder_enabler_create(
+ enum lttng_enabler_format_type format_type,
+ struct lttng_kernel_abi_event *event_param,
+ struct lttng_kernel_channel_buffer *chan);
+void lttng_event_enabler_session_add(struct lttng_kernel_session *session,
+ struct lttng_event_recorder_enabler *event_enabler);
+
+struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
+ struct lttng_event_notifier_group *event_notifier_group,
+ enum lttng_enabler_format_type format_type,
+ struct lttng_kernel_abi_event_notifier *event_notifier_param);
+int lttng_event_notifier_enabler_attach_capture_bytecode(
+ struct lttng_event_notifier_enabler *event_notifier_enabler,
+ struct lttng_kernel_abi_capture_bytecode __user *bytecode);
+
+int lttng_event_enabler_enable(struct lttng_event_enabler_common *event_enabler);
+int lttng_event_enabler_disable(struct lttng_event_enabler_common *event_enabler);
+int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler_common *event_enabler,
+ struct lttng_kernel_abi_filter_bytecode __user *bytecode);
+void lttng_event_enabler_destroy(struct lttng_event_enabler_common *event_enabler);
+
+int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc,
+ struct lttng_event_enabler_common *enabler);
+
+void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc,
+ struct lttng_kernel_ctx *ctx,
+ struct list_head *instance_bytecode_runtime_head,
+ struct list_head *enabler_bytecode_runtime_head);
+
+#if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
+int lttng_syscalls_register_event(struct lttng_event_enabler_common *event_enabler);
+int lttng_syscall_filter_enable_event(struct lttng_kernel_event_common *event);
+int lttng_syscall_filter_disable_event(struct lttng_kernel_event_common *event);
+
+int lttng_syscalls_unregister_syscall_table(struct lttng_kernel_syscall_table *syscall_table);
+int lttng_syscalls_destroy_syscall_table(struct lttng_kernel_syscall_table *syscall_table);
+
+long lttng_channel_syscall_mask(struct lttng_kernel_channel_buffer *channel,
+ struct lttng_kernel_abi_syscall_mask __user *usyscall_mask);
+
+int lttng_syscalls_create_matching_event_notifiers(
+ struct lttng_event_notifier_enabler *event_notifier_enabler);
+#else
+static inline int lttng_syscalls_register_event(struct lttng_event_enabler_common *event_enabler)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscall_filter_enable_event(struct lttng_kernel_event_common *event)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscall_filter_disable_event(struct lttng_kernel_event_common *event)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscalls_unregister_syscall_table(struct lttng_kernel_syscall_table *syscall_table)
+{
+ return 0;
+}
+
+static inline int lttng_syscalls_destroy_syscall_table(struct lttng_kernel_syscall_table *syscall_table)
+{
+ return 0;
+}
+
+static inline long lttng_channel_syscall_mask(struct lttng_kernel_channel_buffer *channel,
+ struct lttng_kernel_syscall_mask __user *usyscall_mask)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscalls_create_matching_event_notifiers(struct lttng_event_notifier_enabler *event_notifier_enabler)
+{
+ return -ENOSYS;
+}
+
+#endif
+
+#ifdef CONFIG_KPROBES
+int lttng_kprobes_register_event(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_kernel_event_recorder *event);
+void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event);
+void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
+int lttng_kprobes_register_event_notifier(const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_kernel_event_notifier *event_notifier);
+void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
+void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
+#else
+static inline
+int lttng_kprobes_register_event(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_kernel_event_recorder *event)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event)
+{
+}
+
+static inline
+void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
+{
+}
+
+static inline
+int lttng_kprobes_register_event_notifier(const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_kernel_event_notifier *event_notifier)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
+{
+}
+
+static inline
+void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
+{
+}
+#endif
+
+int lttng_event_add_callsite(struct lttng_kernel_event_common *event,
+ struct lttng_kernel_abi_event_callsite __user *callsite);
+
+#ifdef CONFIG_UPROBES
+int lttng_uprobes_register_event(const char *name,
+ int fd, struct lttng_kernel_event_common *event);
+int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
+ struct lttng_kernel_abi_event_callsite __user *callsite);
+void lttng_uprobes_unregister_event(struct lttng_kernel_event_common *event);
+void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_common *event);
+#else
+static inline
+int lttng_uprobes_register_event(const char *name,
+ int fd, struct lttng_kernel_event_common *event)
+{
+ return -ENOSYS;
+}
+
+static inline
+int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
+ struct lttng_kernel_abi_event_callsite __user *callsite)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_uprobes_unregister_event(struct lttng_kernel_event_common *event)
+{
+}
+
+static inline
+void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_common *event)
+{
+}
+#endif
+
+#ifdef CONFIG_KRETPROBES
+int lttng_kretprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_kernel_event_recorder *event_entry,
+ struct lttng_kernel_event_recorder *event_exit);
+void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event);
+void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event);
+int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
+ int enable);
+#else
+static inline
+int lttng_kretprobes_register(const char *name,
+ const char *symbol_name,
+ uint64_t offset,
+ uint64_t addr,
+ struct lttng_kernel_event_recorder *event_entry,
+ struct lttng_kernel_event_recorder *event_exit)
+{
+ return -ENOSYS;
+}
+
+static inline
+void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event)
+{
+}
+
+static inline
+void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event)
+{
+}
+
+static inline
+int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
+ int enable)
+{
+ return -ENOSYS;
+}
+#endif
+
+void lttng_lock_sessions(void);
+void lttng_unlock_sessions(void);
+
+struct list_head *lttng_get_probe_list_head(void);
+
+int lttng_fix_pending_events(void);
+int lttng_fix_pending_event_notifiers(void);
+int lttng_session_active(void);
+bool lttng_event_notifier_active(void);
+
+struct lttng_kernel_session *lttng_session_create(void);
+int lttng_session_enable(struct lttng_kernel_session *session);
+int lttng_session_disable(struct lttng_kernel_session *session);
+void lttng_session_destroy(struct lttng_kernel_session *session);
+int lttng_session_metadata_regenerate(struct lttng_kernel_session *session);
+int lttng_session_statedump(struct lttng_kernel_session *session);
+void metadata_cache_destroy(struct kref *kref);
+
+struct lttng_counter *lttng_kernel_counter_create(
+ const char *counter_transport_name, size_t number_dimensions,
+ const size_t *dimensions_sizes);
+int lttng_kernel_counter_read(struct lttng_counter *counter,
+ const size_t *dimension_indexes, int32_t cpu,
+ int64_t *val, bool *overflow, bool *underflow);
+int lttng_kernel_counter_aggregate(struct lttng_counter *counter,
+ const size_t *dimension_indexes, int64_t *val,
+ bool *overflow, bool *underflow);
+int lttng_kernel_counter_clear(struct lttng_counter *counter,
+ const size_t *dimension_indexes);
+struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
+int lttng_event_notifier_group_create_error_counter(
+ struct file *event_notifier_group_file,
+ const struct lttng_kernel_abi_counter_conf *error_counter_conf);
+void lttng_event_notifier_group_destroy(
+ struct lttng_event_notifier_group *event_notifier_group);
+
+struct lttng_kernel_channel_buffer *lttng_channel_buffer_create(struct lttng_kernel_session *session,
+ const char *transport_name,
+ void *buf_addr,
+ size_t subbuf_size, size_t num_subbuf,
+ unsigned int switch_timer_interval,
+ unsigned int read_timer_interval,
+ enum channel_type channel_type);
+struct lttng_kernel_channel_buffer *lttng_global_channel_create(struct lttng_kernel_session *session,
+ int overwrite, void *buf_addr,
+ size_t subbuf_size, size_t num_subbuf,
+ unsigned int switch_timer_interval,
+ unsigned int read_timer_interval);
+
+void lttng_metadata_channel_destroy(struct lttng_kernel_channel_buffer *chan);
+struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_event_recorder_enabler *event_enabler,
+ const struct lttng_kernel_event_desc *event_desc);
+struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_event_recorder_enabler *event_enabler,
+ const struct lttng_kernel_event_desc *event_desc);
+struct lttng_kernel_event_recorder *lttng_event_compat_old_create(struct lttng_kernel_channel_buffer *chan,
+ struct lttng_kernel_abi_old_event *old_event_param,
+ const struct lttng_kernel_event_desc *internal_desc);
+
+struct lttng_kernel_event_notifier *lttng_event_notifier_create(
+ const struct lttng_kernel_event_desc *event_notifier_desc,
+ uint64_t id,
+ uint64_t error_counter_idx,
+ struct lttng_event_notifier_group *event_notifier_group,
+ struct lttng_kernel_abi_event_notifier *event_notifier_param,
+ enum lttng_kernel_abi_instrumentation itype);
+struct lttng_kernel_event_notifier *_lttng_event_notifier_create(
+ const struct lttng_kernel_event_desc *event_notifier_desc,
+ uint64_t id,
+ uint64_t error_counter_idx,
+ struct lttng_event_notifier_group *event_notifier_group,
+ struct lttng_kernel_abi_event_notifier *event_notifier_param,
+ enum lttng_kernel_abi_instrumentation itype);
+
+int lttng_channel_enable(struct lttng_kernel_channel_common *channel);
+int lttng_channel_disable(struct lttng_kernel_channel_common *channel);
+int lttng_event_enable(struct lttng_kernel_event_common *event);
+int lttng_event_disable(struct lttng_kernel_event_common *event);
+
+void lttng_transport_register(struct lttng_transport *transport);
+void lttng_transport_unregister(struct lttng_transport *transport);
+
+void lttng_counter_transport_register(struct lttng_counter_transport *transport);
+void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
+
+void synchronize_trace(void);
+int lttng_abi_init(void);
+int lttng_abi_compat_old_init(void);
+void lttng_abi_exit(void);
+void lttng_abi_compat_old_exit(void);
+
+const struct lttng_kernel_event_desc *lttng_event_desc_get(const char *name);
+void lttng_event_desc_put(const struct lttng_kernel_event_desc *desc);
+int lttng_probes_init(void);
+void lttng_probes_exit(void);
+
+int lttng_metadata_output_channel(struct lttng_metadata_stream *stream,
+ struct lttng_kernel_ring_buffer_channel *chan, bool *coherent);
+
+int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node);
+int lttng_id_tracker_empty_set(struct lttng_kernel_id_tracker *lf);
+int lttng_id_tracker_init(struct lttng_kernel_id_tracker *lf,
+ struct lttng_kernel_session *session,
+ enum tracker_type type);
+void lttng_id_tracker_fini(struct lttng_kernel_id_tracker *lf);
+void lttng_id_tracker_destroy(struct lttng_kernel_id_tracker *lf, bool rcu);
+int lttng_id_tracker_add(struct lttng_kernel_id_tracker *lf, int id);
+int lttng_id_tracker_del(struct lttng_kernel_id_tracker *lf, int id);
+
+int lttng_session_track_id(struct lttng_kernel_session *session,
+ enum tracker_type tracker_type, int id);
+int lttng_session_untrack_id(struct lttng_kernel_session *session,
+ enum tracker_type tracker_type, int id);
+
+int lttng_session_list_tracker_ids(struct lttng_kernel_session *session,
+ enum tracker_type tracker_type);
+
+void lttng_clock_ref(void);
+void lttng_clock_unref(void);
+
+void lttng_free_event_filter_runtime(struct lttng_kernel_event_common *event);
+
+int lttng_probes_init(void);
+
+int lttng_logger_init(void);
+void lttng_logger_exit(void);
+
+extern int lttng_statedump_start(struct lttng_kernel_session *session);
+
+int lttng_calibrate(struct lttng_kernel_abi_calibrate *calibrate);
+
+extern const struct file_operations lttng_tracepoint_list_fops;
+extern const struct file_operations lttng_syscall_list_fops;
+
+#define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \
+ __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \
+ .event_field = (_event_field), \
+ .get_size = (_get_size), \
+ .record = (_record), \
+ .get_value = (_get_value), \
+ .destroy = (_destroy), \
+ .priv = (_priv), \
+ })
+
#endif /* _LTTNG_EVENTS_INTERNAL_H */
projects / lttng-modules.git / blobdiff