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| author | Artem Savkov <asavkov@redhat.com> | 2022-08-10 09:59:03 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-08-10 19:22:18 +0300 |
| commit | 4dd48c6f1f83290d4bc61b43e61d86f8bc6c310e (patch) | |
| tree | 9c01d2a53dac7963116e41142333f73b27d1aa79 /Documentation/bpf | |
| parent | 3143d10b094596f3e5d5964b2660375e586652a3 (diff) | |
| download | linux-4dd48c6f1f83290d4bc61b43e61d86f8bc6c310e.tar.xz | |
bpf: add destructive kfunc flag
Add KF_DESTRUCTIVE flag for destructive functions. Functions with this
flag set will require CAP_SYS_BOOT capabilities.
Signed-off-by: Artem Savkov <asavkov@redhat.com>
Link: https://lore.kernel.org/r/20220810065905.475418-2-asavkov@redhat.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'Documentation/bpf')
| -rw-r--r-- | Documentation/bpf/kfuncs.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/bpf/kfuncs.rst b/Documentation/bpf/kfuncs.rst index c8b21de1c772..781731749e55 100644 --- a/Documentation/bpf/kfuncs.rst +++ b/Documentation/bpf/kfuncs.rst @@ -152,6 +152,15 @@ ensure the integrity of the operation being performed on the expected object. The KF_SLEEPABLE flag is used for kfuncs that may sleep. Such kfuncs can only be called by sleepable BPF programs (BPF_F_SLEEPABLE). +2.4.7 KF_DESTRUCTIVE flag +-------------------------- + +The KF_DESTRUCTIVE flag is used to indicate functions calling which is +destructive to the system. For example such a call can result in system +rebooting or panicking. Due to this additional restrictions apply to these +calls. At the moment they only require CAP_SYS_BOOT capability, but more can be +added later. + 2.5 Registering the kfuncs -------------------------- |