Yonghong Song e87c6bc385 bpf: permit multiple bpf attachments for a single perf event ... This patch enables multiple bpf attachments for a kprobe/uprobe/tracepoint single trace event. Each trace_event keeps a list of attached perf events. When an event happens, all attached bpf programs will be executed based on the order of attachment. A global bpf_event_mutex lock is introduced to protect prog_array attaching and detaching. An alternative will be introduce a mutex lock in every trace_event_call structure, but it takes a lot of extra memory. So a global bpf_event_mutex lock is a good compromise. The bpf prog detachment involves allocation of memory. If the allocation fails, a dummy do-nothing program will replace to-be-detached program in-place. Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-10-25 10:47:47 +09:00
..
bpf	bpf: permit multiple bpf attachments for a single perf event	2017-10-25 10:47:47 +09:00
cgroup	Revert "net: defer call to cgroup_sk_alloc()"	2017-10-10 20:24:29 -07:00
configs	ANDROID: binder: add hwbinder,vndbinder to BINDER_DEVICES.	2017-08-22 18:43:23 -07:00
debug
events	bpf: permit multiple bpf attachments for a single perf event	2017-10-25 10:47:47 +09:00
gcov
irq	genirq/cpuhotplug: Enforce affinity setting on startup of managed irqs	2017-10-09 13:26:48 +02:00
livepatch	livepatch: unpatch all klp_objects if klp_module_coming fails	2017-10-11 15:38:46 +02:00
locking	locking/lockdep: Fix stacktrace mess	2017-10-10 10:04:28 +02:00
power	PM / s2idle: Invoke the ->wake() platform callback earlier	2017-09-29 01:26:13 +02:00
printk	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/pmladek/printk	2017-09-07 21:00:52 -07:00
rcu	doc: Fix various RCU docbook comment-header problems	2017-10-19 22:26:11 -04:00
sched	membarrier: Provide register expedited private command	2017-10-19 22:13:40 -04:00
time	drivers/pps: aesthetic tweaks to PPS-related content	2017-09-08 18:26:51 -07:00
trace	bpf: permit multiple bpf attachments for a single perf event	2017-10-25 10:47:47 +09:00
.gitignore
acct.c	fs: make the buf argument to __kernel_write a void pointer	2017-09-04 19:05:15 -04:00
async.c
audit_fsnotify.c
audit_tree.c
audit_watch.c	audit/stable-4.13 PR 20170816	2017-08-16 16:48:34 -07:00
audit.c	audit: update the function comments	2017-09-05 09:46:59 -04:00
audit.h	ipc: mqueue: Replace timespec with timespec64	2017-09-03 20:21:24 -04:00
auditfilter.c
auditsc.c	Merge branch 'work.ipc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-09-14 17:37:26 -07:00
backtracetest.c
bounds.c
capability.c
compat.c	semtimedop(): move compat to native	2017-07-15 20:46:47 -04:00
configs.c
context_tracking.c
cpu_pm.c	PM / CPU: replace raw_notifier with atomic_notifier	2017-07-31 13:09:49 +02:00
cpu.c	Merge branch 'core-watchdog-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-10-06 08:36:41 -07:00
crash_core.c	kdump: protect vmcoreinfo data under the crash memory	2017-07-12 16:26:00 -07:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	waitid(): Avoid unbalanced user_access_end() on access_ok() error	2017-10-20 15:32:54 -04:00
extable.c	extable: Enable RCU if it is not watching in kernel_text_address()	2017-09-23 16:50:20 -04:00
fork.c	kmemleak: clear stale pointers from task stacks	2017-10-13 16:18:33 -07:00
freezer.c
futex_compat.c
futex.c	futex: Fix pi_state->owner serialization	2017-09-25 16:37:11 +02:00
groups.c	kernel/groups.c: use sort library function	2017-07-10 16:32:34 -07:00
hung_task.c
irq_work.c
jump_label.c	jump_label: Provide hotplug context variants	2017-08-10 12:28:59 +02:00
kallsyms.c	kernel/kallsyms.c: replace all_var with IS_ENABLED(CONFIG_KALLSYMS_ALL)	2017-07-10 16:32:34 -07:00
kcmp.c	kernel/kcmp.c: drop branch leftover typo	2017-10-03 17:54:25 -07:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: support compat processes	2017-09-08 18:26:51 -07:00
kexec_core.c	x86/mm, kexec: Allow kexec to be used with SME	2017-07-18 11:38:04 +02:00
kexec_file.c	kexec_file: adjust declaration of kexec_purgatory	2017-07-12 16:26:02 -07:00
kexec_internal.h	kexec_file: adjust declaration of kexec_purgatory	2017-07-12 16:26:02 -07:00
kexec.c	kdump: protect vmcoreinfo data under the crash memory	2017-07-12 16:26:00 -07:00
kmod.c	kmod: move #ifdef CONFIG_MODULES wrapper to Makefile	2017-09-08 18:26:51 -07:00
kprobes.c
ksysfs.c	kexec: move vmcoreinfo out of the kernel's .bss section	2017-07-12 16:25:59 -07:00
kthread.c	kernel/kthread.c: kthread_worker: don't hog the cpu	2017-08-31 16:33:15 -07:00
latencytop.c
Makefile	kmod: move #ifdef CONFIG_MODULES wrapper to Makefile	2017-09-08 18:26:51 -07:00
memremap.c	memremap: add scheduling point to devm_memremap_pages	2017-10-03 17:54:25 -07:00
module_signing.c
module-internal.h
module.c	module: fix ddebug_remove_module()	2017-07-25 15:08:32 +02:00
notifier.c
nsproxy.c
padata.c
panic.c	locking/refcounts, x86/asm: Implement fast refcount overflow protection	2017-08-17 10:40:26 +02:00
params.c	kernel/params.c: improve STANDARD_PARAM_DEF readability	2017-10-03 17:54:26 -07:00
pid_namespace.c	userns,pidns: Verify the userns for new pid namespaces	2017-07-20 07:43:58 -05:00
pid.c	pids: make task_tgid_nr_ns() safe	2017-08-21 12:47:31 -07:00
profile.c
ptrace.c	signal: Remove kernel interal si_code magic	2017-07-24 14:30:28 -05:00
range.c
reboot.c
relay.c
resource.c
seccomp.c	seccomp: make function __get_seccomp_filter static	2017-10-10 11:45:29 -07:00
signal.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2017-09-11 18:34:47 -07:00
smp.c	treewide: make "nr_cpu_ids" unsigned	2017-09-08 18:26:48 -07:00
smpboot.c	watchdog/core, powerpc: Lock cpus across reconfiguration	2017-10-04 10:53:54 +02:00
smpboot.h
softirq.c
stacktrace.c
stop_machine.c
sys_ni.c
sys.c	prctl: Allow local CAP_SYS_ADMIN changing exe_file	2017-07-20 07:46:07 -05:00
sysctl_binary.c	fs: fix kernel_write prototype	2017-09-04 19:05:15 -04:00
sysctl.c	Merge branch 'core-watchdog-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-10-06 08:36:41 -07:00
task_work.c	task_work: Replace spin_unlock_wait() with lock/unlock pair	2017-07-25 10:08:58 -07:00
taskstats.c
test_kprobes.c
torture.c	torture: Fix typo suppressing CPU-hotplug statistics	2017-07-25 13:04:45 -07:00
tracepoint.c
tsacct.c
ucount.c
uid16.c
umh.c	kmod: split out umh code into its own file	2017-09-08 18:26:50 -07:00
up.c	smp: Avoid using two cache lines for struct call_single_data	2017-08-29 15:14:38 +02:00
user_namespace.c	userns,pidns: Verify the userns for new pid namespaces	2017-07-20 07:43:58 -05:00
user-return-notifier.c
user.c
utsname_sysctl.c
utsname.c
watchdog_hld.c	watchdog/hardlockup/perf: Fix spelling mistake: "permanetely" -> "permanently"	2017-09-28 12:24:54 +02:00
watchdog.c	watchdog/core: Put softlockup_threads_initialized under ifdef guard	2017-10-04 11:30:50 +02:00
workqueue_internal.h
workqueue.c	Merge branch 'for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq	2017-09-06 21:59:31 -07:00