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authorAlexei Starovoitov <ast@plumgrid.com>2014-10-23 18:41:08 -0700
committerDavid S. Miller <davem@davemloft.net>2014-10-27 19:09:59 -0400
commitf89b7755f517cdbb755d7543eef986ee9d54e654 (patch)
treebf491bea6418b0442900d864237e0028f7c35162 /init
parent8ae3c911b9efcca653c552a9c74957a6cb04a87d (diff)
downloadlinux-linaro-stable-f89b7755f517cdbb755d7543eef986ee9d54e654.tar.gz
bpf: split eBPF out of NET
introduce two configs: - hidden CONFIG_BPF to select eBPF interpreter that classic socket filters depend on - visible CONFIG_BPF_SYSCALL (default off) that tracing and sockets can use that solves several problems: - tracing and others that wish to use eBPF don't need to depend on NET. They can use BPF_SYSCALL to allow loading from userspace or select BPF to use it directly from kernel in NET-less configs. - in 3.18 programs cannot be attached to events yet, so don't force it on - when the rest of eBPF infra is there in 3.19+, it's still useful to switch it off to minimize kernel size bloat-o-meter on x64 shows: add/remove: 0/60 grow/shrink: 0/2 up/down: 0/-15601 (-15601) tested with many different config combinations. Hopefully didn't miss anything. Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig14
1 files changed, 14 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 3ee28ae02cc8..2081a4d3d917 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1341,6 +1341,10 @@ config SYSCTL_ARCH_UNALIGN_ALLOW
config HAVE_PCSPKR_PLATFORM
bool
+# interpreter that classic socket filters depend on
+config BPF
+ bool
+
menuconfig EXPERT
bool "Configure standard kernel features (expert users)"
# Unhide debug options, to make the on-by-default options visible
@@ -1521,6 +1525,16 @@ config EVENTFD
If unsure, say Y.
+# syscall, maps, verifier
+config BPF_SYSCALL
+ bool "Enable bpf() system call" if EXPERT
+ select ANON_INODES
+ select BPF
+ default n
+ help
+ Enable the bpf() system call that allows to manipulate eBPF
+ programs and maps via file descriptors.
+
config SHMEM
bool "Use full shmem filesystem" if EXPERT
default y