From 17ca8cbf49be3aa94bb1c2b7ee6545fd70094eb4 Mon Sep 17 00:00:00 2001 From: Daniel Borkmann Date: Fri, 29 May 2015 23:23:06 +0200 Subject: ebpf: allow bpf_ktime_get_ns_proto also for networking As this is already exported from tracing side via commit d9847d310ab4 ("tracing: Allow BPF programs to call bpf_ktime_get_ns()"), we might as well want to move it to the core, so also networking users can make use of it, e.g. to measure diffs for certain flows from ingress/egress. Signed-off-by: Daniel Borkmann Cc: Alexei Starovoitov Cc: Ingo Molnar Signed-off-by: David S. Miller --- kernel/bpf/core.c | 1 + kernel/bpf/helpers.c | 13 +++++++++++++ kernel/trace/bpf_trace.c | 12 ------------ 3 files changed, 14 insertions(+), 12 deletions(-) (limited to 'kernel') diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index d44b25c..4548422 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -734,6 +734,7 @@ const struct bpf_func_proto bpf_map_delete_elem_proto __weak; const struct bpf_func_proto bpf_get_prandom_u32_proto __weak; const struct bpf_func_proto bpf_get_smp_processor_id_proto __weak; +const struct bpf_func_proto bpf_ktime_get_ns_proto __weak; /* To execute LD_ABS/LD_IND instructions __bpf_prog_run() may call * skb_copy_bits(), so provide a weak definition of it for NET-less config. diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index bd7f598..b3aaabd 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -13,6 +13,7 @@ #include #include #include +#include /* If kernel subsystem is allowing eBPF programs to call this function, * inside its own verifier_ops->get_func_proto() callback it should return @@ -111,3 +112,15 @@ const struct bpf_func_proto bpf_get_smp_processor_id_proto = { .gpl_only = false, .ret_type = RET_INTEGER, }; + +static u64 bpf_ktime_get_ns(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5) +{ + /* NMI safe access to clock monotonic */ + return ktime_get_mono_fast_ns(); +} + +const struct bpf_func_proto bpf_ktime_get_ns_proto = { + .func = bpf_ktime_get_ns, + .gpl_only = true, + .ret_type = RET_INTEGER, +}; diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index 646445e..50c4015 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -79,18 +79,6 @@ static const struct bpf_func_proto bpf_probe_read_proto = { .arg3_type = ARG_ANYTHING, }; -static u64 bpf_ktime_get_ns(u64 r1, u64 r2, u64 r3, u64 r4, u64 r5) -{ - /* NMI safe access to clock monotonic */ - return ktime_get_mono_fast_ns(); -} - -static const struct bpf_func_proto bpf_ktime_get_ns_proto = { - .func = bpf_ktime_get_ns, - .gpl_only = true, - .ret_type = RET_INTEGER, -}; - /* * limited trace_printk() * only %d %u %x %ld %lu %lx %lld %llu %llx %p conversion specifiers allowed -- cgit v1.1