X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=include%2Flttng%2Fevents-internal.h;h=b9f0a4148ac288d1b230c5d077722901d8f188cf;hb=f2db8be348380b48e3795d14e49cc585b3c357fd;hp=defea8405e255d6ca838882e966377ffeb7d8035;hpb=9190fb5679c4626e322a4819471e6e76858e063c;p=lttng-modules.git diff --git a/include/lttng/events-internal.h b/include/lttng/events-internal.h index defea840..b9f0a414 100644 --- a/include/lttng/events-internal.h +++ b/include/lttng/events-internal.h @@ -8,25 +8,32 @@ #ifndef _LTTNG_EVENTS_INTERNAL_H #define _LTTNG_EVENTS_INTERNAL_H +#include + #include struct lttng_syscall_filter; struct lttng_metadata_cache; struct perf_event; struct perf_event_attr; -struct lib_ring_buffer_config; +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_enabler *ref; /* backward ref */ + struct lttng_event_enabler_common *ref; /* backward ref */ }; struct lttng_krp; /* Kretprobe handling */ @@ -112,6 +119,58 @@ struct lttng_kernel_event_notifier_private { }; +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, @@ -133,10 +192,15 @@ enum lttng_kernel_bytecode_type { 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_enabler *enabler; + struct lttng_event_enabler_common *enabler; struct { uint32_t len; uint32_t reloc_offset; @@ -162,7 +226,8 @@ struct lttng_kernel_bytecode_runtime { * Enabler field, within whatever object is enabling an event. Target of * backward reference. */ -struct lttng_enabler { +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 */ @@ -174,14 +239,15 @@ struct lttng_enabler { uint64_t user_token; /* User-provided token. */ }; -struct lttng_event_enabler { - struct lttng_enabler base; - struct list_head node; /* per-session list of enablers */ - struct lttng_channel *chan; +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_enabler base; + 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; @@ -223,7 +289,7 @@ struct lttng_kernel_ctx_field { size_t offset); void (*record)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, struct lttng_kernel_ring_buffer_ctx *ctx, - struct lttng_channel *chan); + 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); @@ -265,52 +331,52 @@ struct lttng_metadata_stream { struct lttng_kernel_channel_buffer_ops_private { struct lttng_kernel_channel_buffer_ops *pub; /* Public channel buffer ops interface */ - struct channel *(*channel_create)(const char *name, + 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 channel *chan); - struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); - int (*buffer_has_read_closed_stream)(struct channel *chan); - void (*buffer_read_close)(struct lib_ring_buffer *buf); + 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 channel *chan); - wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); - wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); - int (*is_finalized)(struct channel *chan); - int (*is_disabled)(struct channel *chan); - int (*timestamp_begin) (const struct lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + 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 lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + 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 lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + 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 lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + 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 lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + 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 lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + 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 lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + 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 lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + 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 lib_ring_buffer_config *config, - struct lib_ring_buffer *bufb, + int (*instance_id) (const struct lttng_kernel_ring_buffer_config *config, + struct lttng_kernel_ring_buffer *bufb, uint64_t *id); }; @@ -360,29 +426,12 @@ struct lttng_event_notifier_group { 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 channel *chan; /* Ring buffer channel for event notifier group. */ - struct lib_ring_buffer *buf; /* Ring buffer for event notifier group. */ + 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_event_notifier *sc_unknown; /* for unknown syscalls */ - struct lttng_kernel_event_notifier *sc_compat_unknown; - - struct lttng_syscall_filter *sc_filter; - - struct hlist_head *event_notifier_syscall_dispatch; - struct hlist_head *event_notifier_compat_syscall_dispatch; - struct hlist_head *event_notifier_exit_syscall_dispatch; - struct hlist_head *event_notifier_exit_compat_syscall_dispatch; - - struct hlist_head event_notifier_unknown_syscall_dispatch; - struct hlist_head event_notifier_compat_unknown_syscall_dispatch; - struct hlist_head event_notifier_exit_unknown_syscall_dispatch; - struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch; - int syscall_all_entry; - int syscall_all_exit; - - unsigned int sys_enter_registered:1, sys_exit_registered:1; + struct lttng_kernel_syscall_table syscall_table; struct lttng_counter *error_counter; size_t error_counter_len; @@ -518,9 +567,12 @@ static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kern 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: @@ -535,17 +587,17 @@ int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common * void *event_filter_ctx); static inline -struct lttng_enabler *lttng_event_enabler_as_enabler( - struct lttng_event_enabler *event_enabler) +struct lttng_event_enabler_common *lttng_event_recorder_enabler_as_enabler( + struct lttng_event_recorder_enabler *event_recorder_enabler) { - return &event_enabler->base; + return &event_recorder_enabler->parent; } static inline -struct lttng_enabler *lttng_event_notifier_enabler_as_enabler( +struct lttng_event_enabler_common *lttng_event_notifier_enabler_as_enabler( struct lttng_event_notifier_enabler *event_notifier_enabler) { - return &event_notifier_enabler->base; + return &event_notifier_enabler->parent; } int lttng_context_init(void); @@ -671,7 +723,8 @@ int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx) #endif #if defined(CONFIG_TIME_NS) && \ - (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) + (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 @@ -726,34 +779,29 @@ int lttng_cpuhp_perf_counter_dead(unsigned int cpu, } #endif -struct lttng_event_enabler *lttng_event_enabler_create( +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_channel *chan); + struct lttng_kernel_channel_buffer *chan); +void lttng_event_enabler_session_add(struct lttng_kernel_session *session, + struct lttng_event_recorder_enabler *event_enabler); -int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler); -int lttng_event_enabler_disable(struct lttng_event_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_enable( - struct lttng_event_notifier_enabler *event_notifier_enabler); -int lttng_event_notifier_enabler_disable( - struct lttng_event_notifier_enabler *event_notifier_enabler); - -int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, - struct lttng_kernel_abi_filter_bytecode __user *bytecode); -int lttng_event_notifier_enabler_attach_filter_bytecode( - struct lttng_event_notifier_enabler *event_notifier_enabler, - struct lttng_kernel_abi_filter_bytecode __user *bytecode); 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_enabler *enabler); + struct lttng_event_enabler_common *enabler); void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc, struct lttng_kernel_ctx *ctx, @@ -761,17 +809,13 @@ void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_des struct list_head *enabler_bytecode_runtime_head); #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) -int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler); -int lttng_syscalls_unregister_channel(struct lttng_channel *chan); -int lttng_syscalls_destroy_event(struct lttng_channel *chan); -int lttng_syscall_filter_enable_event( - struct lttng_channel *chan, - struct lttng_kernel_event_recorder *event); -int lttng_syscall_filter_disable_event( - struct lttng_channel *chan, - struct lttng_kernel_event_recorder *event); +int lttng_syscalls_register_event(struct lttng_event_recorder_enabler *event_enabler); +int lttng_syscalls_unregister_channel(struct lttng_kernel_channel_buffer *chan); +int lttng_syscalls_destroy_event(struct lttng_kernel_channel_buffer *chan); +int lttng_syscall_filter_enable_event_recorder(struct lttng_kernel_event_recorder *event_recorder); +int lttng_syscall_filter_disable_event_recorder(struct lttng_kernel_event_recorder *event_recorder); -long lttng_channel_syscall_mask(struct lttng_channel *channel, +long lttng_channel_syscall_mask(struct lttng_kernel_channel_buffer *channel, struct lttng_kernel_abi_syscall_mask __user *usyscall_mask); int lttng_syscalls_register_event_notifier( @@ -783,34 +827,32 @@ int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifie int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier); #else static inline int lttng_syscalls_register_event( - struct lttng_event_enabler *event_enabler) + struct lttng_event_recorder_enabler *event_enabler) { return -ENOSYS; } -static inline int lttng_syscalls_unregister_channel(struct lttng_channel *chan) +static inline int lttng_syscalls_unregister_channel(struct lttng_kernel_channel_buffer *chan) { return 0; } -static inline int lttng_syscalls_destroy(struct lttng_channel *chan) +static inline int lttng_syscalls_destroy(struct lttng_kernel_channel_buffer *chan) { return 0; } -static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan, - struct lttng_kernel_event_recorder *event); +static inline int lttng_syscall_filter_enable_event_recorder(struct lttng_kernel_event_recorder *event_recorder) { return -ENOSYS; } -static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan, - struct lttng_kernel_event_recorder *event); +static inline int lttng_syscall_filter_disable_event_recorder(struct lttng_kernel_event_recorder *event_recorder) { return -ENOSYS; } -static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, +static inline long lttng_channel_syscall_mask(struct lttng_kernel_channel_buffer *channel, struct lttng_kernel_syscall_mask __user *usyscall_mask) { return -ENOSYS; @@ -828,16 +870,12 @@ static inline int lttng_syscalls_unregister_event_notifier_group( return 0; } -static inline int lttng_syscall_filter_enable_event_notifier( - struct lttng_event_notifier_group *group, - const char *name) +static inline int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier) { return -ENOSYS; } -static inline int lttng_syscall_filter_disable_event_notifier( - struct lttng_event_notifier_group *group, - const char *name) +static inline int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier) { return -ENOSYS; } @@ -1033,29 +1071,25 @@ int lttng_event_notifier_group_create_error_counter( void lttng_event_notifier_group_destroy( struct lttng_event_notifier_group *event_notifier_group); -struct lttng_channel *lttng_channel_create(struct lttng_kernel_session *session, +struct lttng_kernel_channel_buffer *lttng_channel_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_channel *lttng_global_channel_create(struct lttng_kernel_session *session, +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_channel *chan); -struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_channel *chan, - struct lttng_kernel_abi_event *event_param, - const struct lttng_kernel_event_desc *event_desc, - enum lttng_kernel_abi_instrumentation itype); -struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_channel *chan, - struct lttng_kernel_abi_event *event_param, - const struct lttng_kernel_event_desc *event_desc, - enum lttng_kernel_abi_instrumentation itype); -struct lttng_kernel_event_recorder *lttng_event_compat_old_create(struct lttng_channel *chan, +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); @@ -1074,8 +1108,8 @@ struct lttng_kernel_event_notifier *_lttng_event_notifier_create( struct lttng_kernel_abi_event_notifier *event_notifier_param, enum lttng_kernel_abi_instrumentation itype); -int lttng_channel_enable(struct lttng_channel *channel); -int lttng_channel_disable(struct lttng_channel *channel); +int lttng_channel_enable(struct lttng_kernel_channel_buffer *channel); +int lttng_channel_disable(struct lttng_kernel_channel_buffer *channel); int lttng_event_enable(struct lttng_kernel_event_common *event); int lttng_event_disable(struct lttng_kernel_event_common *event); @@ -1097,7 +1131,7 @@ int lttng_probes_init(void); void lttng_probes_exit(void); int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, - struct channel *chan, bool *coherent); + 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);