2012-07-10 00:10:41 +00:00
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#ifndef __PSTORE_INTERNAL_H__
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#define __PSTORE_INTERNAL_H__
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2012-07-17 18:37:07 +00:00
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#include <linux/types.h>
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#include <linux/time.h>
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2012-07-10 00:10:41 +00:00
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#include <linux/pstore.h>
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pstore/ftrace: Convert to its own enable/disable debugfs knob
With this patch we no longer reuse function tracer infrastructure, now
we register our own tracer back-end via a debugfs knob.
It's a bit more code, but that is the only downside. On the bright side we
have:
- Ability to make persistent_ram module removable (when needed, we can
move ftrace_ops struct into a module). Note that persistent_ram is still
not removable for other reasons, but with this patch it's just one
thing less to worry about;
- Pstore part is more isolated from the generic function tracer. We tried
it already by registering our own tracer in available_tracers, but that
way we're loosing ability to see the traces while we record them to
pstore. This solution is somewhere in the middle: we only register
"internal ftracer" back-end, but not the "front-end";
- When there is only pstore tracing enabled, the kernel will only write
to the pstore buffer, omitting function tracer buffer (which, of course,
still can be enabled via 'echo function > current_tracer').
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-07-17 21:26:15 +00:00
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#ifdef CONFIG_PSTORE_FTRACE
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extern void pstore_register_ftrace(void);
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2015-10-20 07:39:03 +00:00
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extern void pstore_unregister_ftrace(void);
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pstore/ftrace: Convert to its own enable/disable debugfs knob
With this patch we no longer reuse function tracer infrastructure, now
we register our own tracer back-end via a debugfs knob.
It's a bit more code, but that is the only downside. On the bright side we
have:
- Ability to make persistent_ram module removable (when needed, we can
move ftrace_ops struct into a module). Note that persistent_ram is still
not removable for other reasons, but with this patch it's just one
thing less to worry about;
- Pstore part is more isolated from the generic function tracer. We tried
it already by registering our own tracer in available_tracers, but that
way we're loosing ability to see the traces while we record them to
pstore. This solution is somewhere in the middle: we only register
"internal ftracer" back-end, but not the "front-end";
- When there is only pstore tracing enabled, the kernel will only write
to the pstore buffer, omitting function tracer buffer (which, of course,
still can be enabled via 'echo function > current_tracer').
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-07-17 21:26:15 +00:00
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#else
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static inline void pstore_register_ftrace(void) {}
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2015-10-20 07:39:03 +00:00
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static inline void pstore_unregister_ftrace(void) {}
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pstore/ftrace: Convert to its own enable/disable debugfs knob
With this patch we no longer reuse function tracer infrastructure, now
we register our own tracer back-end via a debugfs knob.
It's a bit more code, but that is the only downside. On the bright side we
have:
- Ability to make persistent_ram module removable (when needed, we can
move ftrace_ops struct into a module). Note that persistent_ram is still
not removable for other reasons, but with this patch it's just one
thing less to worry about;
- Pstore part is more isolated from the generic function tracer. We tried
it already by registering our own tracer in available_tracers, but that
way we're loosing ability to see the traces while we record them to
pstore. This solution is somewhere in the middle: we only register
"internal ftracer" back-end, but not the "front-end";
- When there is only pstore tracing enabled, the kernel will only write
to the pstore buffer, omitting function tracer buffer (which, of course,
still can be enabled via 'echo function > current_tracer').
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
2012-07-17 21:26:15 +00:00
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#endif
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2015-01-17 00:01:10 +00:00
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#ifdef CONFIG_PSTORE_PMSG
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extern void pstore_register_pmsg(void);
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2015-10-20 07:39:03 +00:00
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extern void pstore_unregister_pmsg(void);
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2015-01-17 00:01:10 +00:00
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#else
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static inline void pstore_register_pmsg(void) {}
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2015-10-20 07:39:03 +00:00
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static inline void pstore_unregister_pmsg(void) {}
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2015-01-17 00:01:10 +00:00
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#endif
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2012-07-10 00:10:41 +00:00
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extern struct pstore_info *psinfo;
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2011-03-18 22:33:43 +00:00
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extern void pstore_set_kmsg_bytes(int);
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2011-08-11 22:14:39 +00:00
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extern void pstore_get_records(int);
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2010-12-28 22:25:21 +00:00
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extern int pstore_mkfile(enum pstore_type_id, char *psname, u64 id,
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2013-08-16 20:53:39 +00:00
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int count, char *data, bool compressed,
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size_t size, struct timespec time,
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struct pstore_info *psi);
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2015-10-22 08:02:33 +00:00
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extern bool pstore_is_mounted(void);
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2012-07-10 00:10:41 +00:00
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#endif
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