Alexei Starovoitov 9c959c863f tracing: Allow BPF programs to call bpf_trace_printk() ...

Debugging of BPF programs needs some form of printk from the
program, so let programs call limited trace_printk() with %d %u
%x %p modifiers only.

Similar to kernel modules, during program load verifier checks
whether program is calling bpf_trace_printk() and if so, kernel
allocates trace_printk buffers and emits big 'this is debug
only' banner.

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1427312966-8434-6-git-send-email-ast@plumgrid.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2015-04-02 13:25:50 +02:00

..

bpf

tracing, perf: Implement BPF programs attached to kprobes

2015-04-02 13:25:49 +02:00

configs

…

debug

debug: prevent entering debug mode on panic/exception.

2015-02-19 12:39:03 -06:00

events

tracing, perf: Implement BPF programs attached to kprobes

2015-04-02 13:25:49 +02:00

gcov

kbuild,gcov: simplify kernel/gcov/Makefile more

2015-01-09 17:25:44 +01:00

irq

genirq / PM: Add flag for shared NO_SUSPEND interrupt lines

2015-03-04 21:42:19 +01:00

livepatch

livepatch: Fix subtle race with coming and going modules

2015-03-17 10:31:54 +01:00

locking

locking/rtmutex: Set state back to running on error

2015-03-01 09:45:06 +01:00

power

PM / sleep: Re-implement suspend-to-idle handling

2015-02-13 23:49:36 +01:00

printk

console: Fix console name size mismatch

2015-03-07 03:39:55 +01:00

rcu

Merge branches 'core-urgent-for-linus' and 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-02-21 10:36:06 -08:00

sched

mm: numa: slow PTE scan rate if migration failures occur

2015-03-25 16:20:31 -07:00

time

time: Introduce tk_fast_raw

2015-03-27 09:45:09 +01:00

trace

tracing: Allow BPF programs to call bpf_trace_printk()

2015-04-02 13:25:50 +02:00

.gitignore

…

acct.c

new fs_pin killing logics

2015-01-25 23:17:28 -05:00

async.c

kernel/async.c: switch to pr_foo()

2014-10-09 22:26:04 -04:00

audit_tree.c

fsnotify: unify inode and mount marks handling

2014-12-13 12:42:53 -08:00

audit_watch.c

audit: invalid op= values for rules

2014-09-23 16:37:53 -04:00

audit.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2014-12-30 10:45:47 -08:00

audit.h

audit: replace getname()/putname() hacks with reference counters

2015-01-23 00:23:58 -05:00

auditfilter.c

Merge branch 'upstream' of git://git.infradead.org/users/pcmoore/audit

2015-02-11 20:07:47 -08:00

auditsc.c

Merge branch 'getname2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-02-17 15:27:47 -08:00

backtracetest.c

…

bounds.c

…

capability.c

…

cgroup_freezer.c

…

cgroup.c

kernfs: remove KERNFS_STATIC_NAME

2015-02-13 21:21:36 -08:00

compat.c

all arches, signal: move restart_block to struct task_struct

2015-02-12 18:54:12 -08:00

configs.c

…

context_tracking.c

sched: stop the unbound recursion in preempt_schedule_context()

2014-10-28 10:46:05 +01:00

cpu_pm.c

…

cpu.c

hotplugcpu: Avoid deadlocks by waking active_writer

2015-01-06 11:01:14 -08:00

cpuset.c

cpuset: Fix cpuset sched_relax_domain_level

2015-03-02 11:55:04 -05:00

crash_dump.c

…

cred.c

…

delayacct.c

…

dma.c

…

elfcore.c

…

exec_domain.c

…

exit.c

oom, PM: make OOM detection in the freezer path raceless

2015-02-11 17:06:03 -08:00

extable.c

ftrace/x86/extable: Add is_ftrace_trampoline() function

2014-11-19 15:25:26 -05:00

fork.c

mm: do not use mm->nr_pmds on !MMU configurations

2015-02-12 18:54:10 -08:00

freezer.c

freezer: remove obsolete comments in __thaw_task()

2014-10-21 23:44:20 +02:00

futex_compat.c

…

futex.c

all arches, signal: move restart_block to struct task_struct

2015-02-12 18:54:12 -08:00

groups.c

userns: Don't allow setgroups until a gid mapping has been setablished

2014-12-09 16:58:40 -06:00

hung_task.c

…

irq_work.c

percpu: Convert remaining __get_cpu_var uses in 3.18-rcX

2014-10-29 11:18:18 -04:00

jump_label.c

…

kallsyms.c

kernel/kallsyms.c: use __seq_open_private()

2014-10-14 02:18:16 +02:00

kcmp.c

kcmp: fix standard comparison bug

2014-09-10 15:42:12 -07:00

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

locking/mcs: Better differentiate between MCS variants

2015-01-14 15:07:32 +01:00

Kconfig.preempt

…

kexec.c

kexec: simplify conditional

2015-02-17 14:34:51 -08:00

kmod.c

usermodehelper: kill the kmod_thread_locker logic

2014-12-10 17:41:17 -08:00

kprobes.c

kprobes: makes kprobes/enabled works correctly for optimized kprobes.

2015-02-13 21:21:42 -08:00

ksysfs.c

…

kthread.c

kernel/kthread.c: partial revert of 81c98869fa ("kthread: ensure locality of task_struct allocations")

2014-10-09 22:25:51 -04:00

latencytop.c

…

Makefile

Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security

2015-02-11 20:25:11 -08:00

module_signing.c

…

module-internal.h

…

module.c

kasan, module, vmalloc: rework shadow allocation for modules

2015-03-12 18:46:08 -07:00

notifier.c

rcu: Make SRCU optional by using CONFIG_SRCU

2015-01-06 11:04:29 -08:00

nsproxy.c

bury struct proc_ns in fs/proc

2014-12-04 14:34:54 -05:00

padata.c

padata: use %*pb[l] to print bitmaps including cpumasks and nodemasks

2015-02-13 21:21:38 -08:00

panic.c

livepatch: kernel: add TAINT_LIVEPATCH

2014-12-22 15:40:48 +01:00

params.c

param: fix uninitialized read with CONFIG_DEBUG_LOCK_ALLOC

2015-01-20 11:38:31 +10:30

pid_namespace.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2014-12-16 15:53:03 -08:00

pid.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2014-12-16 15:53:03 -08:00

profile.c

profile: use %*pb[l] to print bitmaps including cpumasks and nodemasks

2015-02-13 21:21:38 -08:00

ptrace.c

ptrace: remove linux/compat.h inclusion under CONFIG_COMPAT

2015-02-17 14:34:51 -08:00

range.c

kernel: avoid overflow in cmp_range

2015-01-17 10:02:23 +13:00

reboot.c

kernel: add support for kernel restart handler call chain

2014-09-26 00:00:06 -07:00

relay.c

…

resource.c

resources: Move struct resource_list_entry from ACPI into resource core

2015-02-05 15:09:25 +01:00

seccomp.c

seccomp: cap SECCOMP_RET_ERRNO data to MAX_ERRNO

2015-02-17 14:34:55 -08:00

signal.c

signal: use current->state helpers

2015-02-17 14:34:51 -08:00

smp.c

Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu

2014-10-15 07:48:18 +02:00

smpboot.c

smpboot: Add missing get_online_cpus() in smpboot_register_percpu_thread()

2015-01-23 11:33:51 +01:00

smpboot.h

…

softirq.c

Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2015-02-09 15:24:03 -08:00

stacktrace.c

stacktrace: introduce snprint_stack_trace for buffer output

2014-12-13 12:42:48 -08:00

stop_machine.c

…

sys_ni.c

syscalls: implement execveat() system call

2014-12-13 12:42:51 -08:00

sys.c

kernel/sys.c: fix UNAME26 for 4.0

2015-02-28 09:57:51 -08:00

sysctl_binary.c

kernel: add panic_on_warn

2014-12-10 17:41:10 -08:00

sysctl.c

mm, hugetlb: remove unnecessary lower bound on sysctl handlers"?

2015-02-10 14:30:34 -08:00

system_certificates.S

…

system_keyring.c

…

task_work.c

…

taskstats.c

netlink: make nlmsg_end() and genlmsg_end() void

2015-01-18 01:03:45 -05:00

test_kprobes.c

…

torture.c

torture: Address race in module cleanup

2014-09-16 13:41:06 -07:00

tracepoint.c

…

tsacct.c

…

uid16.c

groups: Consolidate the setgroups permission checks

2014-12-05 17:19:27 -06:00

up.c

…

user_namespace.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2014-12-17 12:31:40 -08:00

user-return-notifier.c

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user.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2014-12-17 12:31:40 -08:00

utsname_sysctl.c

…

utsname.c

copy address of proc_ns_ops into ns_common

2014-12-04 14:34:47 -05:00

watchdog.c

kernel/sched/clock.c: add another clock for use with the soft lockup watchdog

2015-02-12 18:54:13 -08:00

workqueue_internal.h

…

workqueue.c

workqueue: fix hang involving racing cancel[_delayed]_work_sync()'s for PREEMPT_NONE

2015-03-05 08:04:13 -05:00