X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=ltt-events.h;h=f3f5b8fde1a57355f4aeafab94e5691153c57c24;hb=259b6cb38d19bbe9c039728459bc25acc0f6f8a0;hp=b9bb3bb95d8bba919729afabd17f135a76fe9791;hpb=53f1f0ca4eb1890673992697c19e4e1507ec4ac5;p=lttng-modules.git diff --git a/ltt-events.h b/ltt-events.h index b9bb3bb9..f3f5b8fd 100644 --- a/ltt-events.h +++ b/ltt-events.h @@ -7,11 +7,13 @@ * Copyright 2010 (c) - Mathieu Desnoyers * * Holds LTTng per-session event registry. + * + * Dual LGPL v2.1/GPL v2 license. */ #include -#include #include +#include "wrapper/uuid.h" #include "ltt-debugfs-abi.h" #undef is_signed_type @@ -117,6 +119,17 @@ struct lttng_event_field { struct lttng_type type; }; +/* + * We need to keep this perf counter field separately from struct + * lttng_ctx_field because cpu hotplug needs fixed-location addresses. + */ +struct lttng_perf_counter_field { + struct notifier_block nb; + int hp_enable; + struct perf_event_attr *attr; + struct perf_event **e; /* per-cpu array */ +}; + struct lttng_ctx_field { struct lttng_event_field event_field; size_t (*get_size)(size_t offset); @@ -124,11 +137,7 @@ struct lttng_ctx_field { struct lib_ring_buffer_ctx *ctx, struct ltt_channel *chan); union { - struct { - struct perf_event **e; /* per-cpu array */ - struct list_head head; - struct perf_event_attr *attr; - } perf_counter; + struct lttng_perf_counter_field *perf_counter; } u; void (*destroy)(struct lttng_ctx_field *field); }; @@ -154,6 +163,8 @@ struct lttng_probe_desc { struct list_head head; /* chain registered probes */ }; +struct lttng_krp; /* Kretprobe handling */ + /* * ltt_event structure is referred to by the tracing fast path. It must be * kept small. @@ -161,6 +172,7 @@ struct lttng_probe_desc { struct ltt_event { unsigned int id; struct ltt_channel *chan; + int enabled; const struct lttng_event_desc *desc; void *filter; struct lttng_ctx *ctx; @@ -170,6 +182,10 @@ struct ltt_event { struct kprobe kp; char *symbol_name; } kprobe; + struct { + struct lttng_krp *lttng_krp; + char *symbol_name; + } kretprobe; struct { char *symbol_name; } ftrace; @@ -187,6 +203,7 @@ struct ltt_channel_ops { 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); int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, uint32_t event_id); @@ -199,20 +216,32 @@ struct ltt_channel_ops { * may change due to concurrent writes. */ size_t (*packet_avail_size)(struct channel *chan); - wait_queue_head_t *(*get_reader_wait_queue)(struct ltt_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); +}; + +struct ltt_transport { + char *name; + struct module *owner; + struct list_head node; + struct ltt_channel_ops ops; }; struct ltt_channel { unsigned int id; struct channel *chan; /* Channel buffers */ + int enabled; struct lttng_ctx *ctx; /* Event ID management */ struct ltt_session *session; struct file *file; /* File associated to channel */ unsigned int free_event_id; /* Next event ID to allocate */ struct list_head list; /* Channel list */ - wait_queue_head_t notify_wait; /* Channel addition notif. waitqueue */ struct ltt_channel_ops *ops; + struct ltt_transport *transport; + struct ltt_event **sc_table; /* for syscall tracing */ int header_type; /* 0: unset, 1: compact, 2: large */ int metadata_dumped:1; }; @@ -230,16 +259,9 @@ struct ltt_session { int metadata_dumped:1; }; -struct ltt_transport { - char *name; - struct module *owner; - struct list_head node; - struct ltt_channel_ops ops; -}; - struct ltt_session *ltt_session_create(void); -int ltt_session_start(struct ltt_session *session); -int ltt_session_stop(struct ltt_session *session); +int ltt_session_enable(struct ltt_session *session); +int ltt_session_disable(struct ltt_session *session); void ltt_session_destroy(struct ltt_session *session); struct ltt_channel *ltt_channel_create(struct ltt_session *session, @@ -256,11 +278,18 @@ struct ltt_channel *ltt_global_channel_create(struct ltt_session *session, struct ltt_event *ltt_event_create(struct ltt_channel *chan, struct lttng_kernel_event *event_param, - void *filter); + void *filter, + const struct lttng_event_desc *internal_desc); + +int ltt_channel_enable(struct ltt_channel *channel); +int ltt_channel_disable(struct ltt_channel *channel); +int ltt_event_enable(struct ltt_event *event); +int ltt_event_disable(struct ltt_event *event); void ltt_transport_register(struct ltt_transport *transport); void ltt_transport_unregister(struct ltt_transport *transport); +void synchronize_trace(void); int ltt_debugfs_abi_init(void); void ltt_debugfs_abi_exit(void); @@ -270,12 +299,51 @@ const struct lttng_event_desc *ltt_event_get(const char *name); void ltt_event_put(const struct lttng_event_desc *desc); int ltt_probes_init(void); void ltt_probes_exit(void); + +#ifdef SYSCALL_DETAIL +int lttng_syscalls_register(struct ltt_channel *chan, void *filter); +int lttng_syscalls_unregister(struct ltt_channel *chan); +#else +static inline int lttng_syscalls_register(struct ltt_channel *chan, void *filter) +{ + return -ENOSYS; +} + +static inline int lttng_syscalls_unregister(struct ltt_channel *chan) +{ + return 0; +} +#endif + struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); +int lttng_find_context(struct lttng_ctx *ctx, const char *name); +void lttng_remove_context_field(struct lttng_ctx **ctx, + struct lttng_ctx_field *field); void lttng_destroy_context(struct lttng_ctx *ctx); int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); int lttng_add_comm_to_ctx(struct lttng_ctx **ctx); int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); +int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); +#if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) +int lttng_add_perf_counter_to_ctx(uint32_t type, + uint64_t config, + const char *name, + struct lttng_ctx **ctx); +#else +static inline +int lttng_add_perf_counter_to_ctx(uint32_t type, + uint64_t config, + const char *name, + struct lttng_ctx **ctx) +{ + return -ENOSYS; +} +#endif #ifdef CONFIG_KPROBES int lttng_kprobes_register(const char *name, @@ -307,6 +375,38 @@ void lttng_kprobes_destroy_private(struct ltt_event *event) } #endif +#ifdef CONFIG_KRETPROBES +int lttng_kretprobes_register(const char *name, + const char *symbol_name, + uint64_t offset, + uint64_t addr, + struct ltt_event *event_entry, + struct ltt_event *event_exit); +void lttng_kretprobes_unregister(struct ltt_event *event); +void lttng_kretprobes_destroy_private(struct ltt_event *event); +#else +static inline +int lttng_kretprobes_register(const char *name, + const char *symbol_name, + uint64_t offset, + uint64_t addr, + struct ltt_event *event_entry, + struct ltt_event *event_exit) +{ + return -ENOSYS; +} + +static inline +void lttng_kretprobes_unregister(struct ltt_event *event) +{ +} + +static inline +void lttng_kretprobes_destroy_private(struct ltt_event *event) +{ +} +#endif + #ifdef CONFIG_DYNAMIC_FTRACE int lttng_ftrace_register(const char *name, const char *symbol_name, @@ -333,6 +433,12 @@ void lttng_ftrace_destroy_private(struct ltt_event *event) } #endif +int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); + extern const struct file_operations lttng_tracepoint_list_fops; +#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) +#define TRACEPOINT_HAS_DATA_ARG +#endif + #endif /* _LTT_EVENTS_H */