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bpf: Added new helper bpf_get_ns_current_pid_tgid

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New bpf helper bpf_get_ns_current_pid_tgid,
This helper will return pid and tgid from current task
which namespace matches dev_t and inode number provided,
this will allows us to instrument a process inside a container.

Signed-off-by: Carlos Neira <cneirabustos@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200304204157.58695-3-cneirabustos@gmail.com
This commit is contained in:
Carlos Neira 2020-03-04 17:41:56 -03:00 • committed by Alexei Starovoitov
parent 1e2328e762
commit b4490c5c4e
7 changed files with 88 additions and 2 deletions
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1
include/linux/bpf.h
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@ -1497,6 +1497,7 @@ extern const struct bpf_func_proto bpf_strtol_proto;
extern const struct bpf_func_proto bpf_strtoul_proto;
extern const struct bpf_func_proto bpf_tcp_sock_proto;
extern const struct bpf_func_proto bpf_jiffies64_proto;
extern const struct bpf_func_proto bpf_get_ns_current_pid_tgid_proto;
/* Shared helpers among cBPF and eBPF. */
void bpf_user_rnd_init_once(void);