X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=ltt-tracer.h;h=ef5e815b53afad7a6c202d0d77cf4898419ec5bb;hb=b95190a774269f37d3f48352d093cfd0b16242c4;hp=f75a0704e9d339ca33bb65f718fe6f6d0204ff8d;hpb=1e2015dc246b0aedb981c0121d6c36ffad397e31;p=lttng-modules.git diff --git a/ltt-tracer.h b/ltt-tracer.h index f75a0704..ef5e815b 100644 --- a/ltt-tracer.h +++ b/ltt-tracer.h @@ -9,56 +9,48 @@ #ifndef _LTT_TRACER_H #define _LTT_TRACER_H -#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS -/* Align data on its natural alignment */ -#define RING_BUFFER_ALIGN -#endif - -#include - #include #include #include #include #include -#include #include #include -#include -#include #include #include +#include "trace-clock.h" #include "ltt-tracer-core.h" -#include "ltt-channels.h" +#include "ltt-events.h" /* Number of bytes to log with a read/write event */ #define LTT_LOG_RW_SIZE 32L -struct ltt_active_marker; - /* Maximum number of callbacks per marker */ #define LTT_NR_CALLBACKS 10 +struct ltt_serialize_closure; + +/* Serialization callback */ +typedef size_t (*ltt_serialize_cb)(struct lib_ring_buffer *buf, + size_t buf_offset, + struct ltt_serialize_closure *closure, + void *serialize_private, + unsigned int stack_pos_ctx, + int *largest_align, + const char *fmt, va_list *args); + struct ltt_serialize_closure { ltt_serialize_cb *callbacks; long cb_args[LTT_NR_CALLBACKS]; unsigned int cb_idx; }; -size_t ltt_serialize_data(struct ltt_chanbuf *buf, size_t buf_offset, +size_t ltt_serialize_data(struct lib_ring_buffer *buf, size_t buf_offset, struct ltt_serialize_closure *closure, void *serialize_private, unsigned int stack_pos_ctx, int *largest_align, const char *fmt, va_list *args); -struct ltt_available_probe { - const char *name; /* probe name */ - const char *format; - marker_probe_func *probe_func; - ltt_serialize_cb callbacks[LTT_NR_CALLBACKS]; - struct list_head node; /* registered probes list */ -}; - enum ltt_channels { LTT_CHANNEL_METADATA, LTT_CHANNEL_FD_STATE, @@ -80,99 +72,6 @@ enum ltt_channels { LTT_CHANNEL_DEFAULT, }; -struct ltt_active_marker { - struct list_head node; /* active markers list */ - const char *channel; - const char *name; - const char *format; - struct ltt_available_probe *probe; -}; - -extern void ltt_vtrace(const struct marker *mdata, void *probe_data, - void *call_data, const char *fmt, va_list *args); -extern void ltt_trace(const struct marker *mdata, void *probe_data, - void *call_data, const char *fmt, ...); - -size_t ltt_serialize_printf(struct ltt_chanbuf *buf, unsigned long buf_offset, - size_t *msg_size, char *output, size_t outlen, - const char *fmt); - -/* - * Unique ID assigned to each registered probe. - */ -enum marker_id { - MARKER_ID_SET_MARKER_ID = 0, /* Static IDs available (range 0-7) */ - MARKER_ID_SET_MARKER_FORMAT, - MARKER_ID_COMPACT, /* Compact IDs (range: 8-127) */ - MARKER_ID_DYNAMIC, /* Dynamic IDs (range: 128-65535) */ -}; - -/* static ids 0-1 reserved for internal use. */ -#define MARKER_CORE_IDS 2 -static __inline__ enum marker_id marker_id_type(uint16_t id) -{ - if (id < MARKER_CORE_IDS) - return (enum marker_id)id; - else - return MARKER_ID_DYNAMIC; -} - -struct user_dbg_data { - unsigned long avail_size; - unsigned long write; - unsigned long read; -}; - -struct ltt_trace_ops { - int (*create_dirs) (struct ltt_trace *new_trace); - void (*remove_dirs) (struct ltt_trace *new_trace); - struct channel *ltt_channel_create(const char *name, - struct ltt_trace *trace, - void *buf_addr, - size_t subbuf_size, size_t num_subbuf, - unsigned int switch_timer_interval, - unsigned int read_timer_interval); - void ltt_channel_destroy(struct channel *chan); -}; - -struct ltt_transport { - char *name; - struct module *owner; - struct list_head node; - struct ltt_trace_ops ops; -}; - -enum trace_mode { LTT_TRACE_NORMAL, LTT_TRACE_FLIGHT, LTT_TRACE_HYBRID }; - -#define CHANNEL_FLAG_ENABLE (1U<<0) -#define CHANNEL_FLAG_OVERWRITE (1U<<1) - -/* Per-trace information - each trace/flight recorder represented by one */ -struct ltt_trace { - /* First 32 bytes cache-hot cacheline */ - struct list_head list; - struct ltt_chan **channels; - unsigned int nr_channels; - int active; - /* Second 32 bytes cache-hot cacheline */ - struct ltt_trace_ops *ops; - u32 freq_scale; - u64 start_freq; - u64 start_tsc; - unsigned long long start_monotonic; - struct timeval start_time; - struct ltt_channel_setting *settings; - struct { - struct dentry *trace_root; - struct dentry *ascii_root; - } dentry; - struct kref kref; /* Each channel has a kref of the trace struct */ - struct ltt_transport *transport; - struct kref ltt_transport_kref; - wait_queue_head_t kref_wq; /* Place for ltt_trace_destroy to sleep */ - char trace_name[NAME_MAX]; -} ____cacheline_aligned; - /* * Hardcoded event headers * @@ -222,13 +121,24 @@ struct event_header { * because gcc generates poor code on at least powerpc and mips. Don't ever * let gcc add padding between the structure elements. */ -struct subbuffer_header { - uint64_t cycle_count_begin; /* Cycle count at subbuffer start */ - uint64_t cycle_count_end; /* Cycle count at subbuffer end */ - uint32_t magic_number; /* +struct packet_header { + uint32_t magic; /* * Trace magic number. * contains endianness information. */ + uint8_t trace_uuid[16]; + uint32_t stream_id; + uint64_t timestamp_begin; /* Cycle count at subbuffer start */ + uint64_t timestamp_end; /* Cycle count at subbuffer end */ + uint32_t content_size; /* Size of data in subbuffer */ + uint32_t packet_size; /* Subbuffer size (include padding) */ + uint32_t events_lost; /* + * Events lost in this subbuffer since + * the beginning of the trace. + * (may overflow) + */ + /* TODO: move to metadata */ +#if 0 uint8_t major_version; uint8_t minor_version; uint8_t arch_size; /* Architecture pointer size */ @@ -240,18 +150,7 @@ struct subbuffer_header { * used all along the trace. */ uint32_t freq_scale; /* Frequency scaling (divisor) */ - uint32_t data_size; /* Size of data in subbuffer */ - uint32_t sb_size; /* Subbuffer size (include padding) */ - uint32_t events_lost; /* - * Events lost in this subbuffer since - * the beginning of the trace. - * (may overflow) - */ - uint32_t subbuf_corrupt; /* - * Corrupted (lost) subbuffers since - * the begginig of the trace. - * (may overflow) - */ +#endif //0 uint8_t header_end[0]; /* End of header */ }; @@ -298,7 +197,7 @@ unsigned char record_header_size(const struct lib_ring_buffer_config *config, BUILD_BUG_ON(sizeof(struct event_header) != sizeof(u32)); - padding = lib_ring_buffer_align(config, offset, + padding = lib_ring_buffer_align(offset, sizeof(struct event_header)); offset += padding; offset += sizeof(struct event_header); @@ -309,7 +208,7 @@ unsigned char record_header_size(const struct lib_ring_buffer_config *config, offset += sizeof(u16) + sizeof(u16); if (data_size >= LTT_MAX_SMALL_SIZE) offset += sizeof(u32); - offset += ltt_align(offset, sizeof(u64)); + offset += lib_ring_buffer_align(offset, sizeof(u64)); offset += sizeof(u64); break; case LTT_RFLAG_ID_SIZE: @@ -330,10 +229,9 @@ unsigned char record_header_size(const struct lib_ring_buffer_config *config, #include extern -size_t ltt_write_event_header_slow(struct ltt_chanbuf_alloc *bufa, - struct ltt_chan_alloc *chana, - long buf_offset, u16 eID, u32 event_size, - u64 tsc, unsigned int rflags); +void ltt_write_event_header_slow(const struct lib_ring_buffer_config *config, + struct lib_ring_buffer_ctx *ctx, + u16 eID, u32 event_size); /* * ltt_write_event_header @@ -363,113 +261,10 @@ slow_path: ltt_write_event_header_slow(config, ctx, eID, event_size); } -#if 0 -/* - * ltt_read_event_header - * buf_offset must aligned on 32 bits - */ -static __inline__ -size_t ltt_read_event_header(struct ltt_chanbuf_alloc *bufa, long buf_offset, - u64 *tsc, u32 *event_size, u16 *eID, - unsigned int *rflags) -{ - struct ltt_event_header header; - u16 small_size; - - ltt_relay_read(bufa, buf_offset, &header, sizeof(header)); - buf_offset += sizeof(header); - - *event_size = INT_MAX; - *eID = header.id_time >> LTT_TSC_BITS; - *tsc = header.id_time & LTT_TSC_MASK; - - switch (*eID) { - case 29: - *rflags = LTT_RFLAG_ID_SIZE_TSC; - ltt_relay_read(bufa, buf_offset, eID, sizeof(u16)); - buf_offset += sizeof(u16); - ltt_relay_read(bufa, buf_offset, &small_size, sizeof(u16)); - buf_offset += sizeof(u16); - if (small_size == LTT_MAX_SMALL_SIZE) { - ltt_relay_read(bufa, buf_offset, event_size, - sizeof(u32)); - buf_offset += sizeof(u32); - } else - *event_size = small_size; - buf_offset += ltt_align(buf_offset, sizeof(u64)); - ltt_relay_read(bufa, buf_offset, tsc, sizeof(u64)); - buf_offset += sizeof(u64); - break; - case 30: - *rflags = LTT_RFLAG_ID_SIZE; - ltt_relay_read(bufa, buf_offset, eID, sizeof(u16)); - buf_offset += sizeof(u16); - ltt_relay_read(bufa, buf_offset, &small_size, sizeof(u16)); - buf_offset += sizeof(u16); - if (small_size == LTT_MAX_SMALL_SIZE) { - ltt_relay_read(bufa, buf_offset, event_size, - sizeof(u32)); - buf_offset += sizeof(u32); - } else - *event_size = small_size; - break; - case 31: - *rflags = LTT_RFLAG_ID; - ltt_relay_read(bufa, buf_offset, eID, sizeof(u16)); - buf_offset += sizeof(u16); - break; - default: - *rflags = 0; - break; - } - - return buf_offset; -} -#endif //0 - -/* - * Control channels : - * control/metadata - * control/interrupts - * control/... - * - * cpu channel : - * cpu - */ -#define LTT_RELAY_ROOT "ltt" - -#define LTT_METADATA_CHANNEL "metadata_state" -#define LTT_FD_STATE_CHANNEL "fd_state" -#define LTT_GLOBAL_STATE_CHANNEL "global_state" -#define LTT_IRQ_STATE_CHANNEL "irq_state" -#define LTT_MODULE_STATE_CHANNEL "module_state" -#define LTT_NETIF_STATE_CHANNEL "netif_state" -#define LTT_SOFTIRQ_STATE_CHANNEL "softirq_state" -#define LTT_SWAP_STATE_CHANNEL "swap_state" -#define LTT_SYSCALL_STATE_CHANNEL "syscall_state" -#define LTT_TASK_STATE_CHANNEL "task_state" -#define LTT_VM_STATE_CHANNEL "vm_state" -#define LTT_FS_CHANNEL "fs" -#define LTT_INPUT_CHANNEL "input" -#define LTT_IPC_CHANNEL "ipc" -#define LTT_KERNEL_CHANNEL "kernel" -#define LTT_MM_CHANNEL "mm" -#define LTT_RCU_CHANNEL "rcu" - -#define LTT_FLIGHT_PREFIX "flight-" - -#define LTT_ASCII "ascii" - /* Tracer properties */ -#define LTT_DEFAULT_SUBBUF_SIZE_LOW 65536 -#define LTT_DEFAULT_N_SUBBUFS_LOW 2 -#define LTT_DEFAULT_SUBBUF_SIZE_MED 262144 -#define LTT_DEFAULT_N_SUBBUFS_MED 2 -#define LTT_DEFAULT_SUBBUF_SIZE_HIGH 1048576 -#define LTT_DEFAULT_N_SUBBUFS_HIGH 2 -#define LTT_TRACER_MAGIC_NUMBER 0x00D6B7ED -#define LTT_TRACER_VERSION_MAJOR 2 -#define LTT_TRACER_VERSION_MINOR 6 +#define CTF_MAGIC_NUMBER 0xC1FC1FC1 +#define LTT_TRACER_VERSION_MAJOR 3 +#define LTT_TRACER_VERSION_MINOR 0 /** * ltt_write_trace_header - Write trace header @@ -477,20 +272,21 @@ size_t ltt_read_event_header(struct ltt_chanbuf_alloc *bufa, long buf_offset, * @header: Memory address where the information must be written to */ static __inline__ -void ltt_write_trace_header(void *priv, - struct subbuffer_header *header) +void write_trace_header(const struct lib_ring_buffer_config *config, + struct packet_header *header) { - struct ltt_trace *trace = priv; - - header->magic_number = LTT_TRACER_MAGIC_NUMBER; + header->magic = CTF_MAGIC_NUMBER; +#if 0 + /* TODO: move start time to metadata */ header->major_version = LTT_TRACER_VERSION_MAJOR; header->minor_version = LTT_TRACER_VERSION_MINOR; header->arch_size = sizeof(void *); - header->alignment = lib_ring_buffer_get_alignment(); - header->start_time_sec = trace->start_time.tv_sec; - header->start_time_usec = trace->start_time.tv_usec; - header->start_freq = trace->start_freq; - header->freq_scale = trace->freq_scale; + header->alignment = lib_ring_buffer_get_alignment(config); + header->start_time_sec = ltt_chan->session->start_time.tv_sec; + header->start_time_usec = ltt_chan->session->start_time.tv_usec; + header->start_freq = ltt_chan->session->start_freq; + header->freq_scale = ltt_chan->session->freq_scale; +#endif //0 } /* @@ -513,87 +309,12 @@ extern int ltt_module_register(enum ltt_module_function name, void *function, struct module *owner); extern void ltt_module_unregister(enum ltt_module_function name); -void ltt_transport_register(struct ltt_transport *transport); -void ltt_transport_unregister(struct ltt_transport *transport); - /* Exported control function */ -enum ltt_control_msg { - LTT_CONTROL_START, - LTT_CONTROL_STOP, - LTT_CONTROL_CREATE_TRACE, - LTT_CONTROL_DESTROY_TRACE -}; - -union ltt_control_args { - struct { - enum trace_mode mode; - unsigned int subbuf_size_low; - unsigned int n_subbufs_low; - unsigned int subbuf_size_med; - unsigned int n_subbufs_med; - unsigned int subbuf_size_high; - unsigned int n_subbufs_high; - } new_trace; -}; - -int _ltt_trace_setup(const char *trace_name); -int ltt_trace_setup(const char *trace_name); -struct ltt_trace *_ltt_trace_find_setup(const char *trace_name); -int ltt_trace_set_type(const char *trace_name, const char *trace_type); -int ltt_trace_set_channel_subbufsize(const char *trace_name, - const char *channel_name, - unsigned int size); -int ltt_trace_set_channel_subbufcount(const char *trace_name, - const char *channel_name, - unsigned int cnt); -int ltt_trace_set_channel_switch_timer(const char *trace_name, - const char *channel_name, - unsigned long interval); -int ltt_trace_set_channel_overwrite(const char *trace_name, - const char *channel_name, - unsigned int overwrite); -int ltt_trace_alloc(const char *trace_name); -int ltt_trace_destroy(const char *trace_name); -int ltt_trace_start(const char *trace_name); -int ltt_trace_stop(const char *trace_name); - -extern int ltt_control(enum ltt_control_msg msg, const char *trace_name, - const char *trace_type, union ltt_control_args args); - -enum ltt_filter_control_msg { - LTT_FILTER_DEFAULT_ACCEPT, - LTT_FILTER_DEFAULT_REJECT -}; - -extern int ltt_filter_control(enum ltt_filter_control_msg msg, - const char *trace_name); - -extern struct dentry *get_filter_root(void); - void ltt_core_register(int (*function)(u8, void *)); void ltt_core_unregister(void); -void ltt_release_trace(struct kref *kref); -void ltt_release_transport(struct kref *kref); - -extern int ltt_probe_register(struct ltt_available_probe *pdata); -extern int ltt_probe_unregister(struct ltt_available_probe *pdata); -extern int ltt_marker_connect(const char *channel, const char *mname, - const char *pname); -extern int ltt_marker_disconnect(const char *channel, const char *mname, - const char *pname); -extern void ltt_dump_marker_state(struct ltt_trace *trace); - -void ltt_lock_traces(void); -void ltt_unlock_traces(void); - -extern int ltt_ascii_create_dir(struct ltt_trace *new_trace); -extern void ltt_ascii_remove_dir(struct ltt_trace *trace); -extern int ltt_ascii_create(struct ltt_chan *chan); -extern void ltt_ascii_remove(struct ltt_chan *chan); - extern void ltt_statedump_register_kprobes_dump(void (*callback)(void *call_data)); extern