Documentation/bpf/prog_cgroup_sysctl.rst

1 .. SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
8 provides cgroup-bpf hook for sysctl.
31   (``1``). This field is read-only.
34   or written. This field is read-write. Writing to the field sets the starting
38   when it's called by user space on ``file_pos > 0``. Writing non-zero
55 If program returns ``0`` user space will get ``-1`` from ``read(2)`` or
73   on ``ctx->write == 1``;
77   overridden starting from the current ``ctx->file_pos``. If the whole value
79   to the helper. This helper can be used only on ``ctx->write == 1``. New
102 6. Notes
107 an application, running as root in a separate cgroup, is trying to set.
116 As with any cgroup-bpf program additional care should be taken if an
117 application running as root in a cgroup should not be allowed to
122 .. _strtol(3): http://man7.org/linux/man-pages/man3/strtol.3p.html
123 .. _strtoul(3): http://man7.org/linux/man-pages/man3/strtoul.3p.html