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34 lines
992 B
34 lines
992 B
// SPDX-License-Identifier: GPL-2.0 |
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#ifndef __TRACE_STAT_H |
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#define __TRACE_STAT_H |
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#include <linux/seq_file.h> |
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/* |
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* If you want to provide a stat file (one-shot statistics), fill |
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* an iterator with stat_start/stat_next and a stat_show callbacks. |
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* The others callbacks are optional. |
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*/ |
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struct tracer_stat { |
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/* The name of your stat file */ |
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const char *name; |
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/* Iteration over statistic entries */ |
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void *(*stat_start)(struct tracer_stat *trace); |
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void *(*stat_next)(void *prev, int idx); |
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/* Compare two entries for stats sorting */ |
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cmp_func_t stat_cmp; |
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/* Print a stat entry */ |
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int (*stat_show)(struct seq_file *s, void *p); |
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/* Release an entry */ |
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void (*stat_release)(void *stat); |
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/* Print the headers of your stat entries */ |
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int (*stat_headers)(struct seq_file *s); |
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}; |
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/* |
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* Destroy or create a stat file |
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*/ |
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extern int register_stat_tracer(struct tracer_stat *trace); |
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extern void unregister_stat_tracer(struct tracer_stat *trace); |
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#endif /* __TRACE_STAT_H */
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