bpf: Add bpf_task_from_vpid() kfunc

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bpf_task_from_pid() that currently exists looks up the
struct task_struct corresponding to the pid in the root pid
namespace (init_pid_ns).

This patch adds bpf_task_from_vpid() which looks up the
struct task_struct corresponding to vpid in the pid namespace
of the current process.

This is useful for getting information about other processes
in the same pid namespace.

Signed-off-by: Juntong Deng <juntong.deng@outlook.com>
Link: https://lore.kernel.org/r/AM6PR03MB5848E50DA58F79CDE65433C399442@AM6PR03MB5848.eurprd03.prod.outlook.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

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Juntong Deng 2024-10-14 10:21:08 +01:00 • committed by Alexei Starovoitov

parent 1477d31b1c

commit 675c3596ff

1 changed files with 20 additions and 0 deletions

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kernel/bpf/helpers.c

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