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b=udB7T17McUue+rBn6sKZSQ4RXr6c77fO3nYal8+9cDMnrXlNLerfBLGPKey1RpBj4 r1XTA7NmSs8cDOXDAYB1dTwetlEb+yA6SAjqvexxaFq2EQjTmEGlwJph+cNlzZrPKc Eb/g+Dk+kMZVh/rU8j/RLdj1S75SoI+by2on6uC6kvrGQphytTxYGBzYMZ+sbYV6cS H7IvQMpsHU6hnSH5zTt6ZamX5cinUmVl9jeNfO1zqoKvO67xKlva8iYeyO2C0w5i7U nydwrOiPH6cE6wMef7qAxwKX4GjZCpOBANyi3qFyZUCJ6ACHp3x+uqfYg/FVbojnes ojEbVsuP5ejhw== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 11/28] mm/damon/sysfs: implement filters directory Date: Tue, 12 May 2026 07:36:26 -0700 Message-ID: <20260512143645.113201-12-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260512143645.113201-1-sj@kernel.org> References: <20260512143645.113201-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 9D27A40014 X-Stat-Signature: fudg9bibh4t6tqhwufaku9tqs6drrifj X-HE-Tag: 1778596622-835214 X-HE-Meta: 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 SXA28HIa eArYDRe9YvA00L7mn7OOAITCt83d1i2BuPetL4jmmdI9mwIaQCvEwuVOUwL+tLbiWaywrUiqM2P9oNiCjDuoReC5jmmB35phkTs2mFPFTO/7AX0mt7+5R8YwOIMs90uck1zqRNWmY1zz41QcuEZ6YpKxzT5ecI6ayoneLp9AbGQ2b3aePiIKuCYTfkiFIEf7qbHX6+hGz8seTUVCDdkl4PPbHKcBk9ka070a+oH5YFB7JOKc= 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 fac4e37aa2851..250208d3de21b 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