Alan Maguire c4d0bfb450 bpf: Add bpf_snprintf_btf helper ... A helper is added to support tracing kernel type information in BPF using the BPF Type Format (BTF). Its signature is long bpf_snprintf_btf(char *str, u32 str_size, struct btf_ptr *ptr, u32 btf_ptr_size, u64 flags); struct btf_ptr * specifies - a pointer to the data to be traced - the BTF id of the type of data pointed to - a flags field is provided for future use; these flags are not to be confused with the BTF_F_* flags below that control how the btf_ptr is displayed; the flags member of the struct btf_ptr may be used to disambiguate types in kernel versus module BTF, etc; the main distinction is the flags relate to the type and information needed in identifying it; not how it is displayed. For example a BPF program with a struct sk_buff *skb could do the following: static struct btf_ptr b = { }; b.ptr = skb; b.type_id = __builtin_btf_type_id(struct sk_buff, 1); bpf_snprintf_btf(str, sizeof(str), &b, sizeof(b), 0, 0); Default output looks like this: (struct sk_buff){ .transport_header = (__u16)65535, .mac_header = (__u16)65535, .end = (sk_buff_data_t)192, .head = (unsigned char *)0x000000007524fd8b, .data = (unsigned char *)0x000000007524fd8b, .truesize = (unsigned int)768, .users = (refcount_t){ .refs = (atomic_t){ .counter = (int)1, }, }, } Flags modifying display are as follows: - BTF_F_COMPACT: no formatting around type information - BTF_F_NONAME: no struct/union member names/types - BTF_F_PTR_RAW: show raw (unobfuscated) pointer values; equivalent to %px. - BTF_F_ZERO: show zero-valued struct/union members; they are not displayed by default Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/1601292670-1616-4-git-send-email-alan.maguire@oracle.com		2020-09-28 18:26:58 -07:00
..
bpf	bpf: Add bpf_snprintf_btf helper	2020-09-28 18:26:58 -07:00
cgroup	for-5.9/block-20200802	2020-08-03 11:57:03 -07:00
configs	compiler: remove CONFIG_OPTIMIZE_INLINING entirely	2020-04-07 10:43:42 -07:00
debug	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
dma	dma-pool: Fix an uninitialized variable bug in atomic_pool_expand()	2020-08-27 09:22:56 +02:00
entry	core/entry: Report syscall correctly for trace and audit	2020-09-14 22:49:51 +02:00
events	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
gcov	gcov: add support for GCC 10.1	2020-09-11 09:33:54 -07:00
irq	Three interrupt related fixes for X86:	2020-08-30 12:01:23 -07:00
kcsan	Merge branch 'kcsan' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into locking/core	2020-08-01 09:26:27 +02:00
livepatch	livepatch: Make klp_apply_object_relocs static	2020-05-11 00:31:38 +02:00
locking	locking/percpu-rwsem: Use this_cpu_{inc,dec}() for read_count	2020-09-16 16:26:56 +02:00
power	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
printk	Printk changes for 5.9	2020-08-04 22:22:25 -07:00
rcu	rcu-tasks: Enclose task-list scan in rcu_read_lock()	2020-09-16 16:32:38 -07:00
sched	A set of fixes for lockdep, tracing and RCU:	2020-08-30 11:43:50 -07:00
time	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
trace	bpf: Add bpf_snprintf_btf helper	2020-09-28 18:26:58 -07:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
acct.c	mmap locking API: convert mmap_sem comments	2020-06-09 09:39:14 -07:00
async.c	treewide: Remove uninitialized_var() usage	2020-07-16 12:35:15 -07:00
audit_fsnotify.c	fsnotify: create method handle_inode_event() in fsnotify_operations	2020-07-27 23:25:50 +02:00
audit_tree.c	\n	2020-08-06 19:29:51 -07:00
audit_watch.c	fsnotify: create method handle_inode_event() in fsnotify_operations	2020-07-27 23:25:50 +02:00
audit.c	audit/stable-5.9 PR 20200803	2020-08-04 14:20:26 -07:00
audit.h	revert: 1320a4052e ("audit: trigger accompanying records when no rules present")	2020-07-29 10:00:36 -04:00
auditfilter.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
auditsc.c	audit/stable-5.9 PR 20200803	2020-08-04 14:20:26 -07:00
backtracetest.c	treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()	2020-07-30 11:15:58 -07:00
bounds.c
capability.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
compat.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
configs.c
context_tracking.c	context_tracking: Ensure that the critical path cannot be instrumented	2020-06-11 15:14:36 +02:00
cpu_pm.c	kernel/cpu_pm: Fix uninitted local in cpu_pm	2020-05-15 11:44:34 -07:00
cpu.c	The changes in this cycle are:	2020-06-03 13:06:42 -07:00
crash_core.c	kdump: append kernel build-id string to VMCOREINFO	2020-08-12 10:58:01 -07:00
crash_dump.c	crash_dump: Remove no longer used saved_max_pfn	2020-04-15 11:21:54 +02:00
cred.c	exec: Teach prepare_exec_creds how exec treats uids & gids	2020-05-20 14:44:21 -05:00
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	kernel: add a kernel_wait helper	2020-08-12 10:57:59 -07:00
extable.c	kernel/extable.c: use address-of operator on section symbols	2020-04-07 10:43:42 -07:00
fail_function.c
fork.c	fork: adjust sysctl_max_threads definition to match prototype	2020-09-05 12:14:29 -07:00
freezer.c
futex.c	futex: Convert to use the preferred 'fallthrough' macro	2020-08-13 21:02:12 +02:00
gen_kheaders.sh	kbuild: add variables for compression tools	2020-06-06 23:42:01 +09:00
groups.c	mm: remove the pgprot argument to __vmalloc	2020-06-02 10:59:11 -07:00
hung_task.c	kernel/hung_task.c: introduce sysctl to print all traces when a hung task is detected	2020-06-08 11:05:56 -07:00
iomem.c
irq_work.c	irq_work, smp: Allow irq_work on call_single_queue	2020-05-28 10:54:15 +02:00
jump_label.c
kallsyms.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
kcmp.c	kernel/kcmp.c: Use new infrastructure to fix deadlocks in execve	2020-03-25 10:04:01 -05:00
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kcov: make some symbols static	2020-08-12 10:58:02 -07:00
kexec_core.c
kexec_elf.c
kexec_file.c	Misc fixes and small updates all around the place:	2020-08-15 10:38:03 -07:00
kexec_internal.h
kexec.c
kheaders.c
kmod.c	kmod: remove redundant "be an" in the comment	2020-08-12 10:58:01 -07:00
kprobes.c	Tracing fixes:	2020-09-22 09:08:33 -07:00
ksysfs.c
kthread.c	uaccess: add force_uaccess_{begin,end} helpers	2020-08-12 10:57:59 -07:00
latencytop.c	sysctl: pass kernel pointers to ->proc_handler	2020-04-27 02:07:40 -04:00
Makefile	bpf: Add kernel module with user mode driver that populates bpffs.	2020-08-20 16:02:36 +02:00
module_signature.c
module_signing.c
module-internal.h
module.c	Modules updates for v5.9	2020-08-14 11:07:02 -07:00
notifier.c	mm: remove vmalloc_sync_(un)mappings()	2020-06-02 10:59:12 -07:00
nsproxy.c	nsproxy: support CLONE_NEWTIME with setns()	2020-07-08 11:14:22 +02:00
padata.c	padata: fix possible padata_works_lock deadlock	2020-09-04 17:51:55 +10:00
panic.c	panic: make print_oops_end_marker() static	2020-08-12 10:58:02 -07:00
params.c
pid_namespace.c	pid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid	2020-07-19 20:14:42 +02:00
pid.c	cap-checkpoint-restore-v5.9	2020-08-04 15:02:07 -07:00
profile.c
ptrace.c
range.c
reboot.c	arch: remove unicore32 port	2020-07-01 12:09:13 +03:00
regset.c	regset: kill ->get()	2020-07-27 14:31:12 -04:00
relay.c	kernel/relay.c: fix memleak on destroy relay channel	2020-08-21 09:52:53 -07:00
resource.c	/dev/mem: Revoke mappings when a driver claims the region	2020-05-27 11:10:05 +02:00
rseq.c
scs.c	mm: memcontrol: account kernel stack per node	2020-08-07 11:33:25 -07:00
seccomp.c	seccomp: don't leave dangling ->notif if file allocation fails	2020-09-08 11:30:16 -07:00
signal.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
smp.c	smp: Fix a potential usage of stale nr_cpus	2020-07-22 10:22:04 +02:00
smpboot.c
smpboot.h
softirq.c	tasklets API update for v5.9-rc1	2020-08-04 13:40:35 -07:00
stackleak.c	stackleak: let stack_erasing_sysctl take a kernel pointer buffer	2020-09-19 13:13:39 -07:00
stacktrace.c	uaccess: add force_uaccess_{begin,end} helpers	2020-08-12 10:57:59 -07:00
stop_machine.c
sys_ni.c	all arch: remove system call sys_sysctl	2020-08-14 19:56:56 -07:00
sys.c	treewide: Use fallthrough pseudo-keyword	2020-08-23 17:36:59 -05:00
sysctl-test.c
sysctl.c	mm: allow a controlled amount of unfairness in the page lock	2020-09-17 10:26:41 -07:00
task_work.c	task_work: only grab task signal lock when needed	2020-08-13 09:01:38 -06:00
taskstats.c
test_kprobes.c
torture.c	torture: Dump ftrace at shutdown only if requested	2020-06-29 12:01:45 -07:00
tracepoint.c
tsacct.c
ucount.c	ucount: Make sure ucounts in /proc/sys/user don't regress again	2020-04-07 21:51:27 +02:00
uid16.c
uid16.h
umh.c	kernel: add a kernel_wait helper	2020-08-12 10:57:59 -07:00
up.c
user_namespace.c	nsproxy: add struct nsset	2020-05-09 13:57:12 +02:00
user-return-notifier.c
user.c	user.c: make uidhash_table static	2020-06-04 19:06:24 -07:00
usermode_driver.c	umd: Stop using split_argv	2020-07-07 11:58:59 -05:00
utsname_sysctl.c	sysctl: pass kernel pointers to ->proc_handler	2020-04-27 02:07:40 -04:00
utsname.c	nsproxy: add struct nsset	2020-05-09 13:57:12 +02:00
watch_queue.c	watch_queue: Limit the number of watches a user can hold	2020-08-17 09:39:18 -07:00
watchdog_hld.c
watchdog.c	kernel/watchdog.c: convert {soft/hard}lockup boot parameters to sysctl aliases	2020-06-08 11:05:56 -07:00
workqueue_internal.h
workqueue.c	maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault	2020-06-17 10:57:41 -07:00