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Subject[PATCH bpf-next v1] bpf: add map helper functions push,pop,peek in more BPF programs
Date
From: Alban Crequy <alban@kinvolk.io>

commit f1a2e44a3aec ("bpf: add queue and stack maps") introduced new BPF
helper functions:
- BPF_FUNC_map_push_elem
- BPF_FUNC_map_pop_elem
- BPF_FUNC_map_peek_elem

but they were made available only for network BPF programs. This patch
makes them available for tracepoint, cgroup and lirc programs.

Signed-off-by: Alban Crequy <alban@kinvolk.io>
Cc: Mauricio Vasquez B <mauricio.vasquez@polito.it>
---
drivers/media/rc/bpf-lirc.c | 6 ++++++
kernel/bpf/cgroup.c | 6 ++++++
kernel/trace/bpf_trace.c | 6 ++++++
3 files changed, 18 insertions(+)

diff --git a/drivers/media/rc/bpf-lirc.c b/drivers/media/rc/bpf-lirc.c
index 390a722e6211..ee657003c1a1 100644
--- a/drivers/media/rc/bpf-lirc.c
+++ b/drivers/media/rc/bpf-lirc.c
@@ -97,6 +97,12 @@ lirc_mode2_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_map_update_elem_proto;
case BPF_FUNC_map_delete_elem:
return &bpf_map_delete_elem_proto;
+ case BPF_FUNC_map_push_elem:
+ return &bpf_map_push_elem_proto;
+ case BPF_FUNC_map_pop_elem:
+ return &bpf_map_pop_elem_proto;
+ case BPF_FUNC_map_peek_elem:
+ return &bpf_map_peek_elem_proto;
case BPF_FUNC_ktime_get_ns:
return &bpf_ktime_get_ns_proto;
case BPF_FUNC_tail_call:
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index e58a6c247f56..fcde0f7b2585 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -713,6 +713,12 @@ cgroup_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_map_update_elem_proto;
case BPF_FUNC_map_delete_elem:
return &bpf_map_delete_elem_proto;
+ case BPF_FUNC_map_push_elem:
+ return &bpf_map_push_elem_proto;
+ case BPF_FUNC_map_pop_elem:
+ return &bpf_map_pop_elem_proto;
+ case BPF_FUNC_map_peek_elem:
+ return &bpf_map_peek_elem_proto;
case BPF_FUNC_get_current_uid_gid:
return &bpf_get_current_uid_gid_proto;
case BPF_FUNC_get_local_storage:
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index d64c00afceb5..91800be0c8eb 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -569,6 +569,12 @@ tracing_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_map_update_elem_proto;
case BPF_FUNC_map_delete_elem:
return &bpf_map_delete_elem_proto;
+ case BPF_FUNC_map_push_elem:
+ return &bpf_map_push_elem_proto;
+ case BPF_FUNC_map_pop_elem:
+ return &bpf_map_pop_elem_proto;
+ case BPF_FUNC_map_peek_elem:
+ return &bpf_map_peek_elem_proto;
case BPF_FUNC_probe_read:
return &bpf_probe_read_proto;
case BPF_FUNC_ktime_get_ns:
--
2.20.1
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