diff options
| author | SeongJae Park <sj@kernel.org> | 2026-05-18 16:40:59 -0700 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-05-28 21:31:13 -0700 |
| commit | 92c4bb97de78d41a614005efd7c53369ca7be160 (patch) | |
| tree | a54216d14db3cca400f1413b32a5d2c914ef6257 | |
| parent | b445dd587d793d4b1dbd8046d0587a3acaba4a41 (diff) | |
| download | linux-next-history-92c4bb97de78d41a614005efd7c53369ca7be160.tar.gz | |
mm/damon/sysfs: implement filters directory
Implement a directory for letting users to install data probe filters.
Link: https://lore.kernel.org/20260518234119.97569-12-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Hildenbrand <david@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/damon/sysfs.c | 65 |
1 files changed, 64 insertions, 1 deletions
diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 6cef3eaa4431e..dad4985a826db 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -748,11 +748,41 @@ static const struct kobj_type damon_sysfs_intervals_ktype = { }; /* + * filters directory + */ + +struct damon_sysfs_filters { + struct kobject kobj; +}; + +static struct damon_sysfs_filters *damon_sysfs_filters_alloc(void) +{ + return kzalloc_obj(struct damon_sysfs_filters); +} + +static void damon_sysfs_filters_release(struct kobject *kobj) +{ + kfree(container_of(kobj, struct damon_sysfs_filters, kobj)); +} + +static struct attribute *damon_sysfs_filters_attrs[] = { + NULL, +}; +ATTRIBUTE_GROUPS(damon_sysfs_filters); + +static const struct kobj_type damon_sysfs_filters_ktype = { + .release = damon_sysfs_filters_release, + .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damon_sysfs_filters_groups, +}; + +/* * probe directory */ struct damon_sysfs_probe { struct kobject kobj; + struct damon_sysfs_filters *filters; }; static struct damon_sysfs_probe *damon_sysfs_probe_alloc(void) @@ -760,6 +790,30 @@ static struct damon_sysfs_probe *damon_sysfs_probe_alloc(void) return kzalloc_obj(struct damon_sysfs_probe); } +static int damon_sysfs_probe_add_dirs(struct damon_sysfs_probe *attr) +{ + struct damon_sysfs_filters *filters; + int err; + + filters = damon_sysfs_filters_alloc(); + if (!filters) + return -ENOMEM; + attr->filters = filters; + + err = kobject_init_and_add(&filters->kobj, &damon_sysfs_filters_ktype, + &attr->kobj, "filters"); + if (err) { + kobject_put(&filters->kobj); + attr->filters = NULL; + } + return err; +} + +static void damon_sysfs_probe_rm_dirs(struct damon_sysfs_probe *attr) +{ + kobject_put(&attr->filters->kobj); +} + static void damon_sysfs_probe_release(struct kobject *kobj) { kfree(container_of(kobj, struct damon_sysfs_probe, kobj)); @@ -797,8 +851,10 @@ static void damon_sysfs_probes_rm_dirs( struct damon_sysfs_probe **probes_arr = probes->probes_arr; int i; - for (i = 0; i < probes->nr; i++) + for (i = 0; i < probes->nr; i++) { + damon_sysfs_probe_rm_dirs(probes_arr[i]); kobject_put(&probes_arr[i]->kobj); + } probes->nr = 0; kfree(probes_arr); probes->probes_arr = NULL; @@ -836,6 +892,13 @@ static int damon_sysfs_probes_add_dirs( return err; } + err = damon_sysfs_probe_add_dirs(probe); + if (err) { + kobject_put(&probe->kobj); + damon_sysfs_probes_rm_dirs(probes); + return err; + } + probes_arr[i] = probe; probes->nr++; } |