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
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
printk
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
trace	bpf: permit multiple bpf attachments for a single perf event	2017-10-25 10:47:47 +09:00
.gitignore
acct.c
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c
capability.c
compat.c
configs.c
context_tracking.c
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
cpu_pm.c
crash_core.c
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
fork.c	kmemleak: clear stale pointers from task stacks	2017-10-13 16:18:33 -07:00
freezer.c
futex.c
futex_compat.c
groups.c
hung_task.c
irq_work.c
jump_label.c
kallsyms.c
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
kexec.c
kexec_core.c
kexec_file.c
kexec_internal.h
kmod.c
kprobes.c
ksysfs.c
kthread.c
latencytop.c
Makefile
memremap.c	memremap: add scheduling point to devm_memremap_pages	2017-10-03 17:54:25 -07:00
module-internal.h
module.c
module_signing.c
notifier.c
nsproxy.c
padata.c
panic.c
params.c	kernel/params.c: improve STANDARD_PARAM_DEF readability	2017-10-03 17:54:26 -07:00
pid.c
pid_namespace.c
profile.c
ptrace.c
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
smp.c
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.c
sys_ni.c
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
sysctl_binary.c
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
umh.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
watchdog.c	watchdog/core: Put softlockup_threads_initialized under ifdef guard	2017-10-04 11:30:50 +02:00
watchdog_hld.c
workqueue.c
workqueue_internal.h