The quilt patch titled
Subject: mm/damon/sysfs-schemes: return error when for attempts to install filters on wrong sysfs directory
has been removed from the -mm tree. Its filename was
mm-damon-sysfs-schemes-return-error-when-for-attempts-to-install-filters-on-wrong-sysfs-directory.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: SeongJae Park <sj@xxxxxxxxxx>
Subject: mm/damon/sysfs-schemes: return error when for attempts to install filters on wrong sysfs directory
Date: Wed, 5 Mar 2025 14:27:31 -0800
Return error if the user tries to install a DAMOS filter on DAMOS filters
sysfs directory that assumed to be used for filters that handled by a
DAMON layer that not same to that for the installing filter.
Link: https://lkml.kernel.org/r/20250305222733.59089-7-sj@xxxxxxxxxx
Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/damon/sysfs-schemes.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
--- a/mm/damon/sysfs-schemes.c~mm-damon-sysfs-schemes-return-error-when-for-attempts-to-install-filters-on-wrong-sysfs-directory
+++ a/mm/damon/sysfs-schemes.c
@@ -362,6 +362,23 @@ static ssize_t type_show(struct kobject
damon_sysfs_scheme_filter_type_strs[filter->type]);
}
+static bool damos_sysfs_scheme_filter_valid_type(
+ enum damos_sysfs_filter_handle_layer layer,
+ enum damos_filter_type type)
+{
+ switch (layer) {
+ case DAMOS_SYSFS_FILTER_HANDLE_LAYER_BOTH:
+ return true;
+ case DAMOS_SYSFS_FILTER_HANDLE_LAYER_CORE:
+ return !damos_filter_for_ops(type);
+ case DAMOS_SYSFS_FILTER_HANDLE_LAYER_OPS:
+ return damos_filter_for_ops(type);
+ default:
+ break;
+ }
+ return false;
+}
+
static ssize_t type_store(struct kobject *kobj,
struct kobj_attribute *attr, const char *buf, size_t count)
{
@@ -373,6 +390,9 @@ static ssize_t type_store(struct kobject
for (type = 0; type < NR_DAMOS_FILTER_TYPES; type++) {
if (sysfs_streq(buf, damon_sysfs_scheme_filter_type_strs[
type])) {
+ if (!damos_sysfs_scheme_filter_valid_type(
+ filter->handle_layer, type))
+ break;
filter->type = type;
ret = count;
break;
_
Patches currently in -mm which might be from sj@xxxxxxxxxx are
