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b=V8b11s5JMpFrUIzpDhCudJPn4MMM6r3CMpRyKtuWDNsH5IyPQxJxS8WbqEUyzxOjW IHuE5Bk7riC9mLpURRk6/dneEp3+LHSPHRVrCoN4yyyoNdeQk2hNX0jri9ScjD5kFY xa4yp0Rw85l55uH+ExRSUnHKuieXyU8L66/LafrQ/T9+c2ZNQ2iGJtBKOG5mb3rfSD sEaq5s12o6sK69gF/ed+yw+XyRP+truly6hTAdM4+aOi0iZ8YydPcECCP4S5zHAZu3 +F9sMO0wAOdP+qElgTAwzy4JC1GtL6pFALxwNHzo9LxJWSpvg0IW4Ba5bjicXWXhsN XS3yG7Ahh6CMA== 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 v2.2 11/28] mm/damon/sysfs: implement filters directory Date: Thu, 14 May 2026 17:44:12 -0700 Message-ID: <20260515004433.128933-12-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260515004433.128933-1-sj@kernel.org> References: <20260515004433.128933-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 03E2A4000A X-Rspam-User: X-Stat-Signature: o1h8swydo7z6tagxky9wdgun5x1tz4s6 X-HE-Tag: 1778805890-605502 X-HE-Meta: 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 GrmhRCBT lGFXYA7n5pnZbGQ1JaRIA6hMp6WG+QWoww1rExN1UxFQwObS6SVo49w+Gk0gnGG+sGISi294b3xixFHyC8Pp/sc/H2y760qKbLwvVdHEvd6P6ddCAMUBRXACDQkct/KeYUmokl4xk0ij/9fIm882cvPmilUEiyw6VRkV4X4vMNW5jT8aEjMvpZnShbnMF+7IhytNXlA/aHHbSCzCJWX/x0AZxN1Ju9diZeed3JKLRmu5jdOo= 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 c028e4b1281e6..6b15886190545 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