Josef Bacik dd0bb688ea bpf: add a bpf_override_function helper ... Error injection is sloppy and very ad-hoc. BPF could fill this niche perfectly with it's kprobe functionality. We could make sure errors are only triggered in specific call chains that we care about with very specific situations. Accomplish this with the bpf_override_funciton helper. This will modify the probe'd callers return value to the specified value and set the PC to an override function that simply returns, bypassing the originally probed function. This gives us a nice clean way to implement systematic error injection for all of our code paths. Acked-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Josef Bacik <jbacik@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-11-11 12:18:05 +09:00
..
alpha	License cleanup: add SPDX license identifiers to some files	2017-11-02 10:04:46 -07:00
arc	License cleanup: add SPDX license identifiers to some files	2017-11-02 10:04:46 -07:00
arm	Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm	2017-11-04 14:26:30 -07:00
arm64	Fixes for interrupt controller emulation in ARM/ARM64 and x86, plus a one-liner	2017-11-04 11:44:55 -07:00
blackfin	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
c6x	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
cris	License cleanup: add SPDX license identifier to uapi header files with no license	2017-11-02 11:19:54 +01:00
frv	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
h8300	License cleanup: add SPDX license identifier to uapi header files with no license	2017-11-02 11:19:54 +01:00
hexagon	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
ia64	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-11-05 12:14:50 -08:00
m32r	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
m68k	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
metag	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
microblaze	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
mips	MIPS fixes for 4.14	2017-11-04 11:31:02 -07:00
mn10300	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
nios2	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
openrisc	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
parisc	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
powerpc	powerpc fixes for 4.14 #6	2017-11-03 09:25:53 -07:00
s390	License cleanup: add SPDX license identifiers to some files	2017-11-02 10:04:46 -07:00
score	License cleanup: add SPDX license identifier to uapi header files with no license	2017-11-02 11:19:54 +01:00
sh	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
sparc	License cleanup: add SPDX license identifier to uapi header files with no license	2017-11-02 11:19:54 +01:00
tile	Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile	2017-11-03 10:36:43 -07:00
um	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-11-04 09:26:51 +09:00
unicore32	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
x86	bpf: add a bpf_override_function helper	2017-11-11 12:18:05 +09:00
xtensa	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00
.gitignore
Kconfig	bpf: add a bpf_override_function helper	2017-11-11 12:18:05 +09:00