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b=qyonSZK3Sqo3vxcEuYFvvHUuU2LGTdr/Qq/X+Jxog9MN45lEOPuM4v11XQIP+ZCnR 8P1XjhPRdjPyyebInFoG8NJ5U5S9boE40lOzlWjnscbXl7F9pTuKghwSCcPDf9d1Q/ yhNmPKPJqrq95ptQuNHR0ORwPZD0gBYhHYv/4XS0Qg3AX3HVVu1eAfeJa0N75h+XOO xzkT4wxI/iu+yf6gE6U4xvF6VjviObSd2Jlt61BG1SrcHSii+yRmm0nw2wIojqJvxf /JG/SSJt+sQ4RcTMV+eAaYuDKjKy/HghbqKudd1/AUd1rdMga/ow5JTRrENztyZSsI xRTtUJMJx59JQ== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 11/28] mm/damon/sysfs: implement filters directory Date: Mon, 18 May 2026 16:40:59 -0700 Message-ID: <20260518234119.97569-12-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260518234119.97569-1-sj@kernel.org> References: <20260518234119.97569-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 5BB70180004 X-Stat-Signature: 38uppt7gsop55mrbiqx6xftswp3f1mec X-Rspam-User: X-HE-Tag: 1779147688-319323 X-HE-Meta: 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 GDyyp7Ze gQd9kRkE10LFVRDcoXxjyaRkM4gWDUf7QaJ7naStqLLoH1C1co0IcK8uw2JJoBQNXtpZSPQWleDxSOMuB5mak42ZZZH2FwkRqje6Z44FQQirkjvShy58JpSlbbBh5HRzX5ywYn4u0tjLKJx0hiR6dQlBLITvy2GETlK5MunPMDO9Xo++8ByqlTGKFbx3vZLmWwpMkAkoKMkJ9NJ7wSixEDY4jsUimu6BEC1Q6QnitejPEkzk= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement a directory for letting users to install data probe filters. Signed-off-by: SeongJae Park --- mm/damon/sysfs.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 64 insertions(+), 1 deletion(-) 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 @@ -747,12 +747,42 @@ static const struct kobj_type damon_sysfs_intervals_ktype = { .default_groups = damon_sysfs_intervals_groups, }; +/* + * 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++; } -- 2.47.3