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Alexei Starovoitov a43eec3042 bpf: introduce bpf_perf_event_output() helper 
This helper is used to send raw data from eBPF program into
special PERF_TYPE_SOFTWARE/PERF_COUNT_SW_BPF_OUTPUT perf_event.
User space needs to perf_event_open() it (either for one or all cpus) and
store FD into perf_event_array (similar to bpf_perf_event_read() helper)
before eBPF program can send data into it.

Today the programs triggered by kprobe collect the data and either store
it into the maps or print it via bpf_trace_printk() where latter is the debug
facility and not suitable to stream the data. This new helper replaces
such bpf_trace_printk() usage and allows programs to have dedicated
channel into user space for post-processing of the raw data collected.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2015-10-22 06:42:15 -07:00
..
Kconfig tracing, perf: Implement BPF programs attached to uprobes 2015-08-06 15:29:14 -03:00
Makefile bpf: Fix the build on BPF_SYSCALL=y && !CONFIG_TRACING kernels, make it more configurable 2015-04-02 16:28:06 +02:00
blktrace.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
bpf_trace.c bpf: introduce bpf_perf_event_output() helper 2015-10-22 06:42:15 -07:00
ftrace.c Mostly this is just clean ups and micro optimizations. 2015-09-08 14:04:14 -07:00
power-traces.c PM / sleep: export suspend_resume trace event 2015-01-30 02:10:41 +01:00
ring_buffer.c ring-buffer: Revert "ring-buffer: Get timestamp after event is allocated" 2015-09-03 08:57:12 -04:00
ring_buffer_benchmark.c This patch series contains several clean ups and even a new trace clock 2015-06-26 14:02:43 -07:00
rpm-traces.c PM / Runtime: Introduce trace points for tracing rpm_* functions 2011-09-27 22:53:27 +02:00
trace.c ftrace: correct the counter increment for trace_buffer data 2015-07-20 22:30:45 -04:00
trace.h tracing: Have branch tracer use recursive field of task struct 2015-07-08 11:53:45 -04:00
trace_benchmark.c tracing: Only calculate stats of tracepoint benchmarks for 2^32 times 2014-06-06 00:41:38 -04:00
trace_benchmark.h tracing: Add tracepoint benchmark tracepoint 2014-05-29 22:49:54 -04:00
trace_branch.c tracing: Have branch tracer use recursive field of task struct 2015-07-08 11:53:45 -04:00
trace_clock.c tracing: Export tracing clock functions 2015-05-12 15:56:57 -04:00
trace_entries.h tracing: %pF is only for function pointers 2015-03-25 08:57:22 -04:00
trace_event_perf.c tracing: Rename ftrace_event_{call,class} to trace_event_{call,class} 2015-05-13 14:06:10 -04:00
trace_events.c tracing: Allow triggers to filter for CPU ids and process names 2015-08-11 18:01:06 -04:00
trace_events_filter.c tracing: Allow triggers to filter for CPU ids and process names 2015-08-11 18:01:06 -04:00
trace_events_filter_test.h tracing/filter: Add startup tests for events filter 2011-08-19 14:35:59 -04:00
trace_events_trigger.c tracing: Rename ftrace_raw_##call event structures to trace_event_raw_##call 2015-05-13 21:48:40 -04:00
trace_export.c tracing: Rename ftrace_event_{call,class} to trace_event_{call,class} 2015-05-13 14:06:10 -04:00
trace_functions.c tracing/trivial: Fix typos and make an int into a bool 2014-11-20 10:05:36 -05:00
trace_functions_graph.c ftrace: Fix function_graph duration spacing with 7-digits 2015-07-20 22:30:52 -04:00
trace_irqsoff.c tracing: Remove unneeded includes of debugfs.h and fs.h 2015-01-22 11:19:48 -05:00
trace_kdb.c KGDB/KDB fixes and cleanups 2015-01-09 20:51:10 -08:00
trace_kprobe.c lib: introduce strncpy_from_unsafe() 2015-08-28 16:27:27 -07:00
trace_mmiotrace.c tracing: Rename ftrace_event_{call,class} to trace_event_{call,class} 2015-05-13 14:06:10 -04:00
trace_nop.c tracing: Remove unneeded includes of debugfs.h and fs.h 2015-01-22 11:19:48 -05:00
trace_output.c tracing: Introduce two additional marks for delay 2015-07-20 22:30:52 -04:00
trace_output.h tracing: Rename (un)register_ftrace_event() to (un)register_trace_event() 2015-05-13 14:05:14 -04:00
trace_printk.c tracing: Use IS_ERR() check for return value of tracing_init_dentry() 2015-01-22 11:19:49 -05:00
trace_probe.c trace: Don't use __weak in header files 2015-03-25 08:57:23 -04:00
trace_probe.h tracing: Rename ftrace_event_{call,class} to trace_event_{call,class} 2015-05-13 14:06:10 -04:00
trace_sched_switch.c sched: Introduce the 'trace_sched_waking' tracepoint 2015-08-03 12:21:22 +02:00
trace_sched_wakeup.c sched: Introduce the 'trace_sched_waking' tracepoint 2015-08-03 12:21:22 +02:00
trace_selftest.c Seems that Peter Zijlstra added a new check that is making old 2014-10-12 07:28:55 -04:00
trace_selftest_dynamic.c ftrace: Add self-tests for multiple function trace users 2011-05-18 19:24:51 -04:00
trace_seq.c tracing: use %*pb[l] to print bitmaps including cpumasks and nodemasks 2015-02-13 21:21:37 -08:00
trace_stack.c tracing: Clean up stack tracing and fix fentry updates 2015-07-20 22:30:50 -04:00
trace_stat.c tracing: Convert the tracing facility over to use tracefs 2015-02-03 12:48:41 -05:00
trace_stat.h
…
trace_syscalls.c tracing: Rename ftrace_trigger_soft_disabled() to trace_trigger_soft_disabled() 2015-05-13 15:25:39 -04:00
trace_uprobe.c tracing/uprobes: Do not print '0x (null)' when offset is 0 2015-08-26 10:43:01 -03:00