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bpf: Add BPF_PROG_BIND_MAP syscall

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This syscall binds a map to a program. Returns success if the map is
already bound to the program.

Signed-off-by: YiFei Zhu <zhuyifei@google.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Cc: YiFei Zhu <zhuyifei1999@gmail.com>
Link: https://lore.kernel.org/bpf/20200915234543.3220146-3-sdf@google.com
This commit is contained in:
YiFei Zhu
2020-09-15 16:45:40 -07:00
committed by Alexei Starovoitov
parent 984fe94f94
commit ef15314aa5
3 changed files with 77 additions and 0 deletions
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7
include/uapi/linux/bpf.h
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@@ -124,6 +124,7 @@ enum bpf_cmd {
BPF_ENABLE_STATS,
BPF_ITER_CREATE,
BPF_LINK_DETACH,
BPF_PROG_BIND_MAP,
};
enum bpf_map_type {
@@ -658,6 +659,12 @@ union bpf_attr {
__u32 flags;
} iter_create;
struct { /* struct used by BPF_PROG_BIND_MAP command */
__u32 prog_fd;
__u32 map_fd;
__u32 flags; /* extra flags */
} prog_bind_map;
} __attribute__((aligned(8)));
/* The description below is an attempt at providing documentation to eBPF