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authorArthurChiao2021-09-08 16:08:15 +0800
committerTejun Heo2021-09-13 08:08:46 -1000
commitc0002d11d79900f8aa5c8375336434940d6afedf (patch)
tree43fbe04767d180b8b1baa08409b758d67903156f /Documentation/admin-guide/cgroup-v2.rst
parentb94f9ac79a7395c2d6171cc753cc27942df0be73 (diff)
cgroupv2, docs: fix misinformation in "device controller" section
Hotmail was rejected by the mailing list, switched to gmail to resend. 1. Clarify cgroup BPF program type and attach type; 2. Fix file path broken. Signed-off-by: ArthurChiao <arthurchiao@hotmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'Documentation/admin-guide/cgroup-v2.rst')
-rw-r--r--Documentation/admin-guide/cgroup-v2.rst26
1 files changed, 13 insertions, 13 deletions
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index fc53ae0e96b9..4d8c27eca96b 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -2170,19 +2170,19 @@ existing device files.
Cgroup v2 device controller has no interface files and is implemented
on top of cgroup BPF. To control access to device files, a user may
-create bpf programs of the BPF_CGROUP_DEVICE type and attach them
-to cgroups. On an attempt to access a device file, corresponding
-BPF programs will be executed, and depending on the return value
-the attempt will succeed or fail with -EPERM.
-
-A BPF_CGROUP_DEVICE program takes a pointer to the bpf_cgroup_dev_ctx
-structure, which describes the device access attempt: access type
-(mknod/read/write) and device (type, major and minor numbers).
-If the program returns 0, the attempt fails with -EPERM, otherwise
-it succeeds.
-
-An example of BPF_CGROUP_DEVICE program may be found in the kernel
-source tree in the tools/testing/selftests/bpf/progs/dev_cgroup.c file.
+create bpf programs of type BPF_PROG_TYPE_CGROUP_DEVICE and attach
+them to cgroups with BPF_CGROUP_DEVICE flag. On an attempt to access a
+device file, corresponding BPF programs will be executed, and depending
+on the return value the attempt will succeed or fail with -EPERM.
+
+A BPF_PROG_TYPE_CGROUP_DEVICE program takes a pointer to the
+bpf_cgroup_dev_ctx structure, which describes the device access attempt:
+access type (mknod/read/write) and device (type, major and minor numbers).
+If the program returns 0, the attempt fails with -EPERM, otherwise it
+succeeds.
+
+An example of BPF_PROG_TYPE_CGROUP_DEVICE program may be found in
+tools/testing/selftests/bpf/progs/dev_cgroup.c in the kernel source tree.
RDMA