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Steven Rostedt
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Steven Rostedt
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Apr 14, 2009
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| Original file line number | Diff line number | Diff line change |
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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 9504504cbab29ecb694186b1c5b15d3579c43c51 | ||
| refs/heads/master: 97f2025153499faa17267a0d4e18c7afaf73f39d |
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| #ifndef _LINUX_FTRACE_EVENT_H | ||
| #define _LINUX_FTRACE_EVENT_H | ||
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| #include <linux/trace_seq.h> | ||
| #include <linux/ring_buffer.h> | ||
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| struct trace_array; | ||
| struct tracer; | ||
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| /* | ||
| * The trace entry - the most basic unit of tracing. This is what | ||
| * is printed in the end as a single line in the trace output, such as: | ||
| * | ||
| * bash-15816 [01] 235.197585: idle_cpu <- irq_enter | ||
| */ | ||
| struct trace_entry { | ||
| unsigned char type; | ||
| unsigned char flags; | ||
| unsigned char preempt_count; | ||
| int pid; | ||
| int tgid; | ||
| }; | ||
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| /* | ||
| * Trace iterator - used by printout routines who present trace | ||
| * results to users and which routines might sleep, etc: | ||
| */ | ||
| struct trace_iterator { | ||
| struct trace_array *tr; | ||
| struct tracer *trace; | ||
| void *private; | ||
| int cpu_file; | ||
| struct mutex mutex; | ||
| struct ring_buffer_iter *buffer_iter[NR_CPUS]; | ||
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| /* The below is zeroed out in pipe_read */ | ||
| struct trace_seq seq; | ||
| struct trace_entry *ent; | ||
| int cpu; | ||
| u64 ts; | ||
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| unsigned long iter_flags; | ||
| loff_t pos; | ||
| long idx; | ||
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| cpumask_var_t started; | ||
| }; | ||
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| typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter, | ||
| int flags); | ||
| struct trace_event { | ||
| struct hlist_node node; | ||
| int type; | ||
| trace_print_func trace; | ||
| trace_print_func raw; | ||
| trace_print_func hex; | ||
| trace_print_func binary; | ||
| }; | ||
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| extern int register_ftrace_event(struct trace_event *event); | ||
| extern int unregister_ftrace_event(struct trace_event *event); | ||
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| /* Return values for print_line callback */ | ||
| enum print_line_t { | ||
| TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */ | ||
| TRACE_TYPE_HANDLED = 1, | ||
| TRACE_TYPE_UNHANDLED = 2, /* Relay to other output functions */ | ||
| TRACE_TYPE_NO_CONSUME = 3 /* Handled but ask to not consume */ | ||
| }; | ||
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| struct ring_buffer_event * | ||
| trace_current_buffer_lock_reserve(unsigned char type, unsigned long len, | ||
| unsigned long flags, int pc); | ||
| void trace_current_buffer_unlock_commit(struct ring_buffer_event *event, | ||
| unsigned long flags, int pc); | ||
| void trace_nowake_buffer_unlock_commit(struct ring_buffer_event *event, | ||
| unsigned long flags, int pc); | ||
| void trace_current_buffer_discard_commit(struct ring_buffer_event *event); | ||
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| void tracing_record_cmdline(struct task_struct *tsk); | ||
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| struct ftrace_event_call { | ||
| char *name; | ||
| char *system; | ||
| struct dentry *dir; | ||
| int enabled; | ||
| int (*regfunc)(void); | ||
| void (*unregfunc)(void); | ||
| int id; | ||
| int (*raw_init)(void); | ||
| int (*show_format)(struct trace_seq *s); | ||
| int (*define_fields)(void); | ||
| struct list_head fields; | ||
| int n_preds; | ||
| struct filter_pred **preds; | ||
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| #ifdef CONFIG_EVENT_PROFILE | ||
| atomic_t profile_count; | ||
| int (*profile_enable)(struct ftrace_event_call *); | ||
| void (*profile_disable)(struct ftrace_event_call *); | ||
| #endif | ||
| }; | ||
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| #define MAX_FILTER_PRED 8 | ||
| #define MAX_FILTER_STR_VAL 128 | ||
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| extern int init_preds(struct ftrace_event_call *call); | ||
| extern int filter_match_preds(struct ftrace_event_call *call, void *rec); | ||
| extern int filter_current_check_discard(struct ftrace_event_call *call, | ||
| void *rec, | ||
| struct ring_buffer_event *event); | ||
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| extern int trace_define_field(struct ftrace_event_call *call, char *type, | ||
| char *name, int offset, int size); | ||
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| /* | ||
| * The double __builtin_constant_p is because gcc will give us an error | ||
| * if we try to allocate the static variable to fmt if it is not a | ||
| * constant. Even with the outer if statement optimizing out. | ||
| */ | ||
| #define event_trace_printk(ip, fmt, args...) \ | ||
| do { \ | ||
| __trace_printk_check_format(fmt, ##args); \ | ||
| tracing_record_cmdline(current); \ | ||
| if (__builtin_constant_p(fmt)) { \ | ||
| static const char *trace_printk_fmt \ | ||
| __attribute__((section("__trace_printk_fmt"))) = \ | ||
| __builtin_constant_p(fmt) ? fmt : NULL; \ | ||
| \ | ||
| __trace_bprintk(ip, trace_printk_fmt, ##args); \ | ||
| } else \ | ||
| __trace_printk(ip, fmt, ##args); \ | ||
| } while (0) | ||
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| #define __common_field(type, item) \ | ||
| ret = trace_define_field(event_call, #type, "common_" #item, \ | ||
| offsetof(typeof(field.ent), item), \ | ||
| sizeof(field.ent.item)); \ | ||
| if (ret) \ | ||
| return ret; | ||
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| #endif /* _LINUX_FTRACE_EVENT_H */ |
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