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| author |   Quentin Monnet <quentin.monnet@netronome.com> | 2019-08-20 10:31:50 +0100 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-08-20 09:51:06 -0700 |
| commit | 1b9ed84ecf268904d89edf2908426a8eb3b5a4ba (patch) | |
| tree | 66b002286c9a5a1ff26dcb800c4230f7c5213f63 /kernel/bpf/syscall.c | |
| parent | test_bpf: Fix a new clang warning about xor-ing two numbers (diff) | |
| download | linux-dev-1b9ed84ecf268904d89edf2908426a8eb3b5a4ba.tar.xz linux-dev-1b9ed84ecf268904d89edf2908426a8eb3b5a4ba.zip | |
bpf: add new BPF_BTF_GET_NEXT_ID syscall command
Add a new command for the bpf() system call: BPF_BTF_GET_NEXT_ID is used
to cycle through all BTF objects loaded on the system.
The motivation is to be able to inspect (list) all BTF objects presents
on the system.
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/syscall.c')
| -rw-r--r-- | kernel/bpf/syscall.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c index cf8052b016e7..c0f62fd67c6b 100644 --- a/kernel/bpf/syscall.c +++ b/kernel/bpf/syscall.c @@ -2884,6 +2884,10 @@ SYSCALL_DEFINE3(bpf, int, cmd, union bpf_attr __user *, uattr, unsigned int, siz err = bpf_obj_get_next_id(&attr, uattr, &map_idr, &map_idr_lock); break; + case BPF_BTF_GET_NEXT_ID: + err = bpf_obj_get_next_id(&attr, uattr, + &btf_idr, &btf_idr_lock); + break; case BPF_PROG_GET_FD_BY_ID: err = bpf_prog_get_fd_by_id(&attr); break; |