Steven Rostedt (VMware) 8530dec63e tracing: Add tracing_check_open_get_tr() ... Currently, most files in the tracefs directory test if tracing_disabled is set. If so, it should return -ENODEV. The tracing_disabled is called when tracing is found to be broken. Originally it was done in case the ring buffer was found to be corrupted, and we wanted to prevent reading it from crashing the kernel. But it's also called if a tracing selftest fails on boot. It's a one way switch. That is, once it is triggered, tracing is disabled until reboot. As most tracefs files can also be used by instances in the tracefs directory, they need to be carefully done. Each instance has a trace_array associated to it, and when the instance is removed, the trace_array is freed. But if an instance is opened with a reference to the trace_array, then it requires looking up the trace_array to get its ref counter (as there could be a race with it being deleted and the open itself). Once it is found, a reference is added to prevent the instance from being removed (and the trace_array associated with it freed). Combine the two checks (tracing_disabled and trace_array_get()) into a single helper function. This will also make it easier to add lockdown to tracefs later. Link: http://lkml.kernel.org/r/20191011135458.7399da44@gandalf.local.home Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2019-10-12 20:44:07 -04:00
..
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2019-09-28 17:47:33 -07:00
cgroup	Merge branch 'for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2019-09-17 15:57:22 -07:00
configs	kvm_config: add CONFIG_VIRTIO_MENU	2018-10-24 20:55:56 -04:00
debug	kgdb: don't use a notifier to enter kgdb at panic; call directly	2019-09-25 17:51:40 -07:00
dma	dma-mapping: fix false positivse warnings in dma_common_free_remap()	2019-10-05 10:24:17 +02:00
events	perf_event_open: switch to copy_struct_from_user()	2019-10-01 15:45:22 +02:00
gcov	um: Enable CONFIG_CONSTRUCTORS	2019-09-15 21:37:13 +02:00
irq	Power management updates for 5.4-rc1	2019-09-17 19:15:14 -07:00
livepatch	livepatch: Nullify obj->mod in klp_module_coming()'s error path	2019-08-19 13:03:37 +02:00
locking	Revert "locking/pvqspinlock: Don't wait if vCPU is preempted"	2019-09-25 10:22:37 +02:00
power	Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-09-28 08:14:15 -07:00
printk	Merge branch 'for-5.4' into for-linus	2019-09-16 12:54:25 +02:00
rcu	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-09-16 17:25:49 -07:00
sched	copy-struct-from-user-v5.4-rc2	2019-10-04 10:36:31 -07:00
time	tick: broadcast-hrtimer: Fix a race in bc_set_next	2019-09-27 14:45:55 +02:00
trace	tracing: Add tracing_check_open_get_tr()	2019-10-12 20:44:07 -04:00
.gitignore	Provide in-kernel headers to make extending kernel easier	2019-04-29 16:48:03 +02:00
Kconfig.freezer	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Kconfig.hz	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Kconfig.locks	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
Kconfig.preempt	sched/rt, Kconfig: Unbreak def/oldconfig with CONFIG_PREEMPT=y	2019-07-22 18:05:11 +02:00
Makefile	Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity	2019-09-27 19:37:27 -07:00
acct.c	acct_on(): don't mess with freeze protection	2019-04-04 21:04:13 -04:00
async.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
audit.c	audit/stable-5.3 PR 20190702	2019-07-08 18:55:42 -07:00
audit.h	audit/stable-5.3 PR 20190702	2019-07-08 18:55:42 -07:00
audit_fsnotify.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
audit_tree.c	fsnotify: switch send_to_group() and ->handle_event to const struct qstr *	2019-04-26 13:51:03 -04:00
audit_watch.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156	2019-05-30 11:26:35 -07:00
auditfilter.c	audit/stable-5.3 PR 20190702	2019-07-08 18:55:42 -07:00
auditsc.c	audit: enforce op for string fields	2019-05-28 17:46:43 -04:00
backtracetest.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
bounds.c	kbuild: fix kernel/bounds.c 'W=1' warning	2018-10-31 08:54:14 -07:00
capability.c	LSM: add SafeSetID module that gates setid calls	2019-01-25 11:22:43 -08:00
compat.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
configs.c	kernel/configs: Replace GPL boilerplate code with SPDX identifier	2019-07-30 18:34:15 +02:00
context_tracking.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
cpu.c	cpu/SMT: create and export cpu_smt_possible()	2019-09-24 13:37:28 +02:00
cpu_pm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282	2019-06-05 17:36:37 +02:00
crash_core.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230	2019-06-19 17:09:06 +02:00
crash_dump.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
cred.c	Merge branch 'access-creds'	2019-07-25 08:36:29 -07:00
delayacct.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 25	2019-05-21 11:52:39 +02:00
dma.c	…
elfcore.c	kernel/elfcore.c: include proper prototypes	2019-09-25 17:51:39 -07:00
exec_domain.c	…
exit.c	tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code	2019-09-25 17:42:29 +02:00
extable.c	extable: Add function to search only kernel exception table	2019-08-21 22:23:48 +10:00
fail_function.c	fail_function: no need to check return value of debugfs_create functions	2019-06-03 15:49:06 +02:00
fork.c	copy-struct-from-user-v5.4-rc2	2019-10-04 10:36:31 -07:00
freezer.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
futex.c	hrtimer/treewide: Use hrtimer_sleeper_start_expires()	2019-08-01 17:43:16 +02:00
gen_kheaders.sh	kheaders: make headers archive reproducible	2019-10-05 15:29:49 +09:00
groups.c	…
hung_task.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
iomem.c	mm/nvdimm: add is_ioremap_addr and use that to check ioremap address	2019-07-12 11:05:40 -07:00
irq_work.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
jump_label.c	jump_label: Don't warn on __exit jump entries	2019-08-29 15:10:10 +01:00
kallsyms.c	kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol	2019-08-27 16:19:56 +01:00
kcmp.c	…
kcov.c	kcov: convert kcov.refcount to refcount_t	2019-03-07 18:32:02 -08:00
kexec.c	kexec_load: Disable at runtime if the kernel is locked down	2019-08-19 21:54:15 -07:00
kexec_core.c	kexec: bail out upon SIGKILL when allocating memory.	2019-09-25 17:51:40 -07:00
kexec_elf.c	kexec_elf: support 32 bit ELF files	2019-09-06 23:58:44 +02:00
kexec_file.c	Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-09-28 08:14:15 -07:00
kexec_internal.h	…
kheaders.c	kheaders: Move from proc to sysfs	2019-05-24 20:16:01 +02:00
kmod.c	…
kprobes.c	Tracing updates:	2019-09-20 11:19:48 -07:00
ksysfs.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 170	2019-05-30 11:26:39 -07:00
kthread.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
latencytop.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
module-internal.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36	2019-05-24 17:27:11 +02:00
module.c	Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2019-09-28 08:14:15 -07:00
module_signature.c	MODSIGN: Export module signature definitions	2019-08-05 18:39:56 -04:00
module_signing.c	MODSIGN: Export module signature definitions	2019-08-05 18:39:56 -04:00
notifier.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
nsproxy.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
padata.c	padata: remove cpu_index from the parallel_queue	2019-09-13 21:15:41 +10:00
panic.c	bug: consolidate __WARN_FLAGS usage	2019-09-25 17:51:41 -07:00
params.c	lockdown: Lock down module params that specify hardware parameters (eg. ioport)	2019-08-19 21:54:16 -07:00
pid.c	kernel/pid.c: convert struct pid count to refcount_t	2019-07-16 19:23:24 -07:00
pid_namespace.c	proc/sysctl: add shared variables for range check	2019-07-18 17:08:07 -07:00
profile.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
ptrace.c	ptrace: add PTRACE_GET_SYSCALL_INFO request	2019-07-16 19:23:24 -07:00
range.c	…
reboot.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
relay.c	Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2019-03-12 13:27:20 -07:00
resource.c	mm/memory_hotplug.c: use PFN_UP / PFN_DOWN in walk_system_ram_range()	2019-09-24 15:54:09 -07:00
rseq.c	signal: Remove task parameter from force_sig	2019-05-27 09:36:28 -05:00
seccomp.c	signal: Remove the signal number and task parameters from force_sig_info	2019-05-29 09:31:44 -05:00
signal.c	core-process-v5.4	2019-09-16 09:28:19 -07:00
smp.c	smp: Warn on function calls from softirq context	2019-07-20 11:27:16 +02:00
smpboot.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
smpboot.h	…
softirq.c	Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 11:01:13 -07:00
stackleak.c	stackleak: Mark stackleak_track_stack() as notrace	2018-12-05 19:31:44 -08:00
stacktrace.c	stacktrace: Constify 'entries' arguments	2019-07-25 15:43:26 +02:00
stop_machine.c	stop_machine: Fix stop_cpus_in_progress ordering	2019-08-08 09:09:30 +02:00
sys.c	Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-09-17 12:35:15 -07:00
sys_ni.c	arch: handle arches who do not yet define clone3	2019-06-21 01:54:53 +02:00
sysctl.c	arm64, mm: move generic mmap layout functions to mm	2019-09-24 15:54:11 -07:00
sysctl_binary.c	kernel/sysctl: add panic_print into sysctl	2019-01-04 13:13:47 -08:00
task_work.c	…
taskstats.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
test_kprobes.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 25	2019-05-21 11:52:39 +02:00
torture.c	torture: Remove exporting of internal functions	2019-08-01 14:30:22 -07:00
tracepoint.c	The main changes in this release include:	2019-07-18 11:51:00 -07:00
tsacct.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 157	2019-05-30 11:26:37 -07:00
ucount.c	proc/sysctl: add shared variables for range check	2019-07-18 17:08:07 -07:00
uid16.c	…
uid16.h	…
umh.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
up.c	smp: Remove smp_call_function() and on_each_cpu() return values	2019-06-23 14:26:26 +02:00
user-return-notifier.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
user.c	Keyrings namespacing	2019-07-08 19:36:47 -07:00
user_namespace.c	Keyrings namespacing	2019-07-08 19:36:47 -07:00
utsname.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
utsname_sysctl.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441	2019-06-05 17:37:17 +02:00
watchdog.c	watchdog: Mark watchdog_hrtimer to expire in hard interrupt context	2019-08-01 20:51:20 +02:00
watchdog_hld.c	kernel/watchdog_hld.c: hard lockup message should end with a newline	2019-04-19 09:46:05 -07:00
workqueue.c	workqueue: require CPU hotplug read exclusion for apply_workqueue_attrs	2019-09-13 21:15:40 +10:00
workqueue_internal.h	sched/core, workqueues: Distangle worker accounting from rq lock	2019-04-16 16:55:15 +02:00