2023-12-04 07:52:56

by Thomas Weißschuh

[permalink] [raw]
Subject: [PATCH v2 04/18] cgroup: bpf: constify ctl_table arguments and fields

In a future commit the sysctl core will only use
"const struct ctl_table". As a preparation for that adapt the cgroup-bpf
code.

Signed-off-by: Thomas Weißschuh <[email protected]>
---
include/linux/bpf-cgroup.h | 2 +-
include/linux/filter.h | 2 +-
kernel/bpf/cgroup.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/bpf-cgroup.h b/include/linux/bpf-cgroup.h
index a789266feac3..504fe9f8a3e7 100644
--- a/include/linux/bpf-cgroup.h
+++ b/include/linux/bpf-cgroup.h
@@ -138,7 +138,7 @@ int __cgroup_bpf_check_dev_permission(short dev_type, u32 major, u32 minor,
short access, enum cgroup_bpf_attach_type atype);

int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
- struct ctl_table *table, int write,
+ const struct ctl_table *table, int write,
char **buf, size_t *pcount, loff_t *ppos,
enum cgroup_bpf_attach_type atype);

diff --git a/include/linux/filter.h b/include/linux/filter.h
index a4953fafc8cb..4d035fbd8558 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -1358,7 +1358,7 @@ struct bpf_sock_ops_kern {

struct bpf_sysctl_kern {
struct ctl_table_header *head;
- struct ctl_table *table;
+ const struct ctl_table *table;
void *cur_val;
size_t cur_len;
void *new_val;
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index 491d20038cbe..85476970b487 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -1694,7 +1694,7 @@ const struct bpf_verifier_ops cg_dev_verifier_ops = {
* returned value != 1 during execution. In all other cases 0 is returned.
*/
int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
- struct ctl_table *table, int write,
+ const struct ctl_table *table, int write,
char **buf, size_t *pcount, loff_t *ppos,
enum cgroup_bpf_attach_type atype)
{

--
2.43.0