Yonghong Song 239946314e bpf: possibly avoid extra masking for narrower load in verifier ... Commit 31fd85816d ("bpf: permits narrower load from bpf program context fields") permits narrower load for certain ctx fields. The commit however will already generate a masking even if the prog-specific ctx conversion produces the result with narrower size. For example, for __sk_buff->protocol, the ctx conversion loads the data into register with 2-byte load. A narrower 2-byte load should not generate masking. For __sk_buff->vlan_present, the conversion function set the result as either 0 or 1, essentially a byte. The narrower 2-byte or 1-byte load should not generate masking. To avoid unnecessary masking, prog-specific *_is_valid_access now passes converted_op_size back to verifier, which indicates the valid data width after perceived future conversion. Based on this information, verifier is able to avoid unnecessary marking. Since we want more information back from prog-specific *_is_valid_access checking, all of them are packed into one data structure for more clarity. Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Yonghong Song <yhs@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-06-23 14:04:11 -04:00
..
blktrace.c	blktrace: fix integer parse	2017-05-19 09:21:15 -06:00
bpf_trace.c	bpf: possibly avoid extra masking for narrower load in verifier	2017-06-23 14:04:11 -04:00
ftrace.c	ftrace: Fix memory leak in ftrace_graph_release()	2017-05-26 22:35:48 -04:00
Kconfig	New features for this release:	2017-05-03 18:41:21 -07:00
Makefile	perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS	2017-03-01 10:26:39 +01:00
power-traces.c	cpufreq: schedutil: New governor based on scheduler utilization data	2016-04-02 01:09:12 +02:00
ring_buffer_benchmark.c	ring-buffer: Return reader page back into existing ring buffer	2017-05-01 10:26:40 -04:00
ring_buffer.c	New features for this release:	2017-05-03 18:41:21 -07:00
rpm-traces.c
trace_benchmark.c	tracing: Have the trace_event benchmark thread call cond_resched_rcu_qs()	2017-04-17 15:21:19 -04:00
trace_benchmark.h	tracing: Have the reg function allow to fail	2016-12-09 09:13:30 -05:00
trace_branch.c	tracing: Add the constant count for branch tracer	2017-01-19 08:57:41 -05:00
trace_clock.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
trace_entries.h	trace: make trace_hwlat timestamp y2038 safe	2017-05-08 17:15:15 -07:00
trace_event_perf.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2016-05-17 16:26:30 -07:00
trace_events_filter_test.h
trace_events_filter.c	tracing/filter: Define op as the enum that it is	2016-11-14 16:42:59 -05:00
trace_events_hist.c	sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>	2017-03-02 08:42:38 +01:00
trace_events_trigger.c	sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>	2017-03-02 08:42:38 +01:00
trace_events.c	tracing/ftrace: Add a better way to pass data via the probe functions	2017-04-20 22:06:46 -04:00
trace_export.c	tracing: ftrace_event_is_function() can return boolean	2015-11-02 14:28:05 -05:00
trace_functions_graph.c	tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too	2016-12-09 09:21:35 -05:00
trace_functions.c	tracing/ftrace: Allow for instances to trigger their own stacktrace probes	2017-04-20 22:06:49 -04:00
trace_hwlat.c	trace: make trace_hwlat timestamp y2038 safe	2017-05-08 17:15:15 -07:00
trace_irqsoff.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
trace_kdb.c	tracing: Move trace_flags from global to a trace_array field	2015-09-30 15:22:55 -04:00
trace_kprobe.c	tracing/kprobes: Enforce kprobes teardown after testing	2017-05-17 21:50:27 -04:00
trace_mmiotrace.c	tracing: Expose CPU physical addresses (resource values) for PCI devices	2016-06-20 09:54:22 -04:00
trace_nop.c	tracing: Fix typoes in code comment and printk in trace_nop.c	2016-03-08 11:23:57 -05:00
trace_output.c	trace: make trace_hwlat timestamp y2038 safe	2017-05-08 17:15:15 -07:00
trace_output.h	tracing: Turn seq_print_user_ip() into a static function	2015-09-28 10:16:12 -04:00
trace_printk.c	tracing: Handle NULL formats in hold_module_trace_bprintk_format()	2016-06-20 09:46:12 -04:00
trace_probe.c	tracing/probes: Fix a warning message to show correct maximum length	2017-02-15 10:32:48 -05:00
trace_probe.h	perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS	2017-03-01 10:26:39 +01:00
trace_sched_switch.c	sched/core: Fix trace_sched_switch()	2015-10-06 17:08:15 +02:00
trace_sched_wakeup.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
trace_selftest_dynamic.c
trace_selftest.c	sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h>	2017-03-02 08:42:27 +01:00
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	rcu/tracing: Add rcu_disabled to denote when rcu_irq_enter() will not work	2017-04-10 15:22:03 -04:00
trace_stat.c	kernel/...: convert pr_warning to pr_warn	2016-03-22 15:36:02 -07:00
trace_stat.h
trace_syscalls.c	tracing/syscalls: fix multiline in error message text	2016-09-29 10:25:23 +02:00
trace_uprobe.c	sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>	2017-03-02 08:42:38 +01:00
trace.c	tracing: Make sure RCU is watching before calling a stack trace	2017-05-18 23:57:56 -04:00
trace.h	ftrace: Remove #ifdef from code and add clear_ftrace_function_probes() stub	2017-05-17 21:53:32 -04:00
tracing_map.c	tracing: Handle tracing_map_alloc_elts() error path correctly	2016-04-26 09:40:30 -04:00
tracing_map.h	tracing: Update some tracing_map constants and comments	2016-04-19 12:16:06 -04:00