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Andrii Nakryiko 36e68442d1 bpf: Load and verify kernel module BTFs 
Add kernel module listener that will load/validate and unload module BTF.
Module BTFs gets ID generated for them, which makes it possible to iterate
them with existing BTF iteration API. They are given their respective module's
names, which will get reported through GET_OBJ_INFO API. They are also marked
as in-kernel BTFs for tooling to distinguish them from user-provided BTFs.

Also, similarly to vmlinux BTF, kernel module BTFs are exposed through
sysfs as /sys/kernel/btf/<module-name>. This is convenient for user-space
tools to inspect module BTF contents and dump their types with existing tools:

[vmuser@archvm bpf]$ ls -la /sys/kernel/btf
total 0
drwxr-xr-x  2 root root       0 Nov  4 19:46 .
drwxr-xr-x 13 root root       0 Nov  4 19:46 ..

...

-r--r--r--  1 root root     888 Nov  4 19:46 irqbypass
-r--r--r--  1 root root  100225 Nov  4 19:46 kvm
-r--r--r--  1 root root   35401 Nov  4 19:46 kvm_intel
-r--r--r--  1 root root     120 Nov  4 19:46 pcspkr
-r--r--r--  1 root root     399 Nov  4 19:46 serio_raw
-r--r--r--  1 root root 4094095 Nov  4 19:46 vmlinux

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/bpf/20201110011932.3201430-5-andrii@kernel.org
2020-11-10 15:25:53 -08:00
..
ABI bpf: Load and verify kernel module BTFs 2020-11-10 15:25:53 -08:00
accounting
admin-guide The one new feature this time, from Anna Schumaker, is READ_PLUS, which 2020-10-22 09:44:27 -07:00
arm As hoped, things calmed down for docs this cycle; fewer changes and almost 2020-10-12 16:21:29 -07:00
arm64 As hoped, things calmed down for docs this cycle; fewer changes and almost 2020-10-12 16:21:29 -07:00
block docs: block: blk-mq.rst: get rid of :c:type 2020-10-15 07:49:43 +02:00
bpf bpf: Migrate from patchwork.ozlabs.org to patchwork.kernel.org. 2020-10-11 22:05:47 +02:00
cdrom A handful of obvious fixes that wandered in during the merge window. 2020-08-13 13:57:45 -07:00
core-api docs updates for v5.10-rc1 2020-10-16 15:02:21 -07:00
cpu-freq
crypto crypto: af_alg - add extra parameters for DRBG interface 2020-09-25 17:48:52 +10:00
dev-tools linux-kselftest-kunit-5.10-rc1 2020-10-18 14:45:59 -07:00
devicetree Fixes for 5.10-rc1 from the networking tree: 2020-10-23 12:05:49 -07:00
doc-guide docs: kerneldoc.py: add support for kerneldoc -nosymbol 2020-10-15 07:49:38 +02:00
driver-api docs updates for v5.10-rc1 2020-10-16 15:02:21 -07:00
fault-injection lib, include/linux: add usercopy failure capability 2020-10-16 11:11:22 -07:00
fb drm next for 5.10-rc1 2020-10-15 10:46:16 -07:00
features s390 updates for the 5.10 merge window 2020-10-16 12:36:38 -07:00
filesystems The siginificant new ext4 feature this time around is Harshad's new 2020-10-22 10:31:08 -07:00
firmware-guide docs: add some new files to their respective index.rst files 2020-09-10 10:48:20 -06:00
firmware_class
fpga Char/Misc driver patches for 5.9-rc1 2020-08-05 11:43:47 -07:00
gpu drm fixes for 5.10-rc1 2020-10-20 10:19:02 -07:00
hid docs: hid: Convert link to https 2020-07-13 11:26:37 -06:00
hwmon - New Drivers 2020-10-14 15:56:58 -07:00
i2c Documentation: i2c: add testunit docs to index 2020-10-05 22:57:45 +02:00
ia64 docs/ia64: Drop obsolete Xen documentation 2020-08-31 16:16:03 -06:00
ide
iio Documentation: iio: fix a typo 2020-09-09 11:41:20 -06:00
infiniband RDMA/core: Remove FMR device ops 2020-06-02 20:32:54 -03:00
input Input: uinput - fix typo in function name documentation 2020-07-28 18:24:11 -07:00
isdn
kbuild kbuild: doc: describe proper script invocation 2020-10-13 18:38:26 -07:00
kernel-hacking
leds leds: we don't want people to use LED subsystem for vibrations 2020-08-17 18:04:15 +02:00
litmus-tests Documentation/litmus-tests: Add note on herd7 7.56 in atomic litmus test 2020-06-29 12:05:18 -07:00
livepatch
locking seqlock: Introduce seqcount_latch_t 2020-09-10 11:19:28 +02:00
m68k
maintainer Documentation/maintainer: rehome sign-off process 2020-09-03 15:39:24 -06:00
mhi
mips dt: Remove booting-without-of.rst 2020-10-13 13:33:16 -05:00
misc-devices Documentation: misc/xilinx_sdfec: eliminate duplicated word 2020-07-13 09:44:07 -06:00
netlabel
networking Fixes for 5.10-rc1 from the networking tree: 2020-10-23 12:05:49 -07:00
nios2
nvdimm nvdimm: fixes to maintainter-entry-profile 2020-05-25 10:19:19 -06:00
openrisc docs: openrisc: Replace HTTP links with HTTPS ones 2020-07-13 11:34:09 -06:00
parisc
PCI Documentation: better locations for sysfs-pci, sysfs-tagging 2020-10-09 09:33:23 -06:00
pcmcia
power PCI/PM: Rename pci_dev.d3_delay to d3hot_delay 2020-09-29 14:21:50 -05:00
powerpc docs updates for v5.10-rc1 2020-10-16 15:02:21 -07:00
process Kbuild updates for v5.10 2020-10-22 13:13:57 -07:00
RCU Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu 2020-10-09 08:21:56 +02:00
riscv
s390 It's been a busy cycle for documentation - hopefully the busiest for a 2020-08-04 22:47:54 -07:00
scheduler docs: scheduler: fix the directory name on two files 2020-09-10 10:45:45 -06:00
scsi SPDX patches for 5.10-rc1 2020-10-14 16:19:42 -07:00
security Documentation: remove current_security() reference 2020-09-09 11:33:59 -06:00
sh dt: Remove booting-without-of.rst 2020-10-13 13:33:16 -05:00
sound docs: writing-an-alsa-driver.rst: fix some bad c:func: markups 2020-10-15 07:49:43 +02:00
sparc
sphinx docs: get rid of :c:type explicit declarations for structs 2020-10-15 07:49:40 +02:00
sphinx-static
spi SPI SUBSYSTEM: Replace HTTP links with HTTPS ones 2020-07-09 22:41:11 +01:00
staging remoteproc updates for v5.9 2020-08-11 11:17:45 -07:00
target doc: don't use deprecated "---help---" markers in target docs 2020-06-13 13:32:40 -07:00
timers docs: timers: drop documentation about LB_BIAS 2020-07-23 14:32:44 -06:00
trace docs updates for v5.10-rc1 2020-10-16 15:02:21 -07:00
translations docs: zh_CN: amu.rst: fix document title markup 2020-10-15 07:49:46 +02:00
usb USB: Replace HTTP links with HTTPS ones 2020-07-21 13:41:57 +02:00
userspace-api docs updates for v5.10-rc1 2020-10-16 15:02:21 -07:00
virt ARM: 2020-10-23 11:17:56 -07:00
vm mm/doc: fix a literal block markup 2020-10-16 07:28:20 +02:00
w1 docs: w1: w1_therm: Fix broken xref, mistakes, clarify text 2020-10-08 09:47:15 +02:00
watchdog watchdog: add support for adjusting last known HW keepalive time 2020-08-05 18:43:02 +02:00
x86 Devicetree updates for v5.10: 2020-10-14 15:31:58 -07:00
xtensa
.gitignore
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt Documentation/litmus-tests/atomic: Add a test for smp_mb__after_atomic() 2020-06-29 12:05:18 -07:00
Changes
CodingStyle
conf.py docs: conf.py: change the Sphinx 3.x+ text 2020-10-15 07:49:45 +02:00
COPYING-logo Replace HTTP links with HTTPS ones: documentation 2020-06-08 09:30:19 -06:00
docutils.conf
dontdiff Documentation: dontdiff: Add zstd compressed files 2020-07-31 11:51:10 +02:00
index.rst docs: index.rst: Add watch_queue 2020-07-23 14:13:23 -06:00
Kconfig
logo.gif
Makefile media updates for v5.8-rc1 2020-06-03 20:59:38 -07:00
memory-barriers.txt docs/memory-barriers.txt: Fix references for DMA*.txt files 2020-08-31 16:14:44 -06:00
SubmittingPatches
watch_queue.rst docs: watch_queue: fix some warnings 2020-09-10 10:48:56 -06:00