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ANDROID: logbuf: Add new logbuf vendor hook to support pr_cont()

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Add new logbuf vendor hook android_vh_logbuf_pr_cont()
to capture pr_cont logs.

Bug: 185182649
Change-Id: I76b310fc9caac71b344b6cc25ea36f7f81cb7148
Signed-off-by: Mukesh Ojha <mojha@codeaurora.org>
This commit is contained in:
Mukesh Ojha 2021-06-27 15:26:40 +05:30 • committed by Todd Kjos
commit 01f2392e13
3 changed files with 7 additions and 0 deletions
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1
drivers/android/vendor_hooks.c
View file

@ -271,6 +271,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_post_init_entity_util_avg);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_typec_tcpm_get_timer);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_typec_tcpm_adj_current_limit);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_logbuf);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_logbuf_pr_cont);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_tune_scan_type);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_tune_swappiness);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_shrink_slab_bypass);

4
include/trace/hooks/logbuf.h
View file

@ -17,6 +17,10 @@ struct printk_record;
DECLARE_HOOK(android_vh_logbuf,
TP_PROTO(struct printk_ringbuffer *rb, struct printk_record *r),
TP_ARGS(rb, r))
DECLARE_HOOK(android_vh_logbuf_pr_cont,
TP_PROTO(struct printk_record *r, size_t text_len),
TP_ARGS(r, text_len))
#else
#define trace_android_vh_logbuf(rb, r)
#endif

2
kernel/printk/printk.c
View file

@ -1958,6 +1958,8 @@ static size_t log_output(int facility, int level, enum log_flags lflags,
} else {
prb_commit(&e);
}
trace_android_vh_logbuf_pr_cont(&r, text_len);
return text_len;
}
}