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b=KVgUePz96y1L65EFHBLf3cfL0qHfwHwU5csEA6Pc4XEATVh5hbgDQS/+aGKXyqb/Q zdsG4p3QRL8L2pvGOL7KhRTrCJUFj3VvsYgjihI+jpymggk/UKzmTk9SXCqbWE2+OH bsJKpgocozn4wjVAF1prMWPLCYndi9V2nOh+lPk9XL9Fkhdsau+Q7fWsCNK7M8EMKK SNq4uNdtQtcsbuARTEmFkUzUoJiFilxAMvC391+47NccUmDGQ31yX0qWu6S+S6UJuJ R+HxABfoph5askdWN2r7e8suRCsj7svboTsyaL9tzE6hZsgKzWjZOJY0aZ5g31MFqA 1kqmTURfYaMNQ== From: SJ Park To: Cc: SJ Park , Andrew Morton , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2.2 09/17] mm/damon/sysfs: implement preps directory Date: Mon, 27 Jul 2026 21:12:30 -0700 Message-ID: <20260728041242.187380-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260728041242.187380-1-sj@kernel.org> References: <20260728041242.187380-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: E72B3C0002 X-Stat-Signature: cdpewd75cr3y1mffjo4t5qn993hj9m4j X-Rspam-User: X-HE-Tag: 1785211975-508976 X-HE-Meta: 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 pkpJ18DD PplQ1KcGRITuJpD/V01SMkhu5ucqYH6ZWy0kt+y3mgnpuH1lnRIg1kSwDCSfXIxnSlt/psd4irg41+7pHcFm+1oIyf7hil3PEGjF/bem4qElt0c4diScbWpHktlT+Uq1uTmSEoaUoDGi6mwBenSiUz40371z13tQDNg9DXGVMTa+vpRde2n9niZtq4bhmviFlluse/7A2EXjbNMw7wW0J5zUBin//fHoHUQMCVtbu6CksCAk= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement a sysfs directory named 'preps' under the probe directory. It will be evolved to be used for specifying probe preps. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 65 +++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 59 insertions(+), 6 deletions(-) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 50ff1c172d746..66a3e7de869a8 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -750,6 +750,35 @@ static const struct kobj_type damon_sysfs_intervals_ktype = { .default_groups = damon_sysfs_intervals_groups, }; +/* + * preps directory + */ + +struct damon_sysfs_preps { + struct kobject kobj; +}; + +static struct damon_sysfs_preps *damon_sysfs_preps_alloc(void) +{ + return kzalloc_obj(struct damon_sysfs_preps); +} + +static void damon_sysfs_preps_release(struct kobject *kobj) +{ + kfree(container_of(kobj, struct damon_sysfs_preps, kobj)); +} + +static struct attribute *damon_sysfs_preps_attrs[] = { + NULL, +}; +ATTRIBUTE_GROUPS(damon_sysfs_preps); + +static const struct kobj_type damon_sysfs_preps_ktype = { + .release = damon_sysfs_preps_release, + .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damon_sysfs_preps_groups, +}; + /* * filter directory */ @@ -1070,6 +1099,7 @@ static const struct kobj_type damon_sysfs_filters_ktype = { struct damon_sysfs_probe { struct kobject kobj; unsigned int weight; + struct damon_sysfs_preps *preps; struct damon_sysfs_filters *filters; }; @@ -1080,25 +1110,48 @@ static struct damon_sysfs_probe *damon_sysfs_probe_alloc(void) static int damon_sysfs_probe_add_dirs(struct damon_sysfs_probe *probe) { + struct damon_sysfs_preps *preps; struct damon_sysfs_filters *filters; int err; - filters = damon_sysfs_filters_alloc(); - if (!filters) + preps = damon_sysfs_preps_alloc(); + if (!preps) return -ENOMEM; + probe->preps = preps; + + err = kobject_init_and_add(&preps->kobj, &damon_sysfs_preps_ktype, + &probe->kobj, "preps"); + if (err) + goto put_preps_out; + + filters = damon_sysfs_filters_alloc(); + if (!filters) { + err = -ENOMEM; + goto del_preps_out; + } probe->filters = filters; err = kobject_init_and_add(&filters->kobj, &damon_sysfs_filters_ktype, &probe->kobj, "filters"); - if (err) { - kobject_put(&filters->kobj); - probe->filters = NULL; - } + if (err) + goto put_filters_out; + return err; + +put_filters_out: + kobject_put(&filters->kobj); + probe->filters = NULL; +del_preps_out: + kobject_del(&preps->kobj); +put_preps_out: + kobject_put(&preps->kobj); + probe->preps = NULL; return err; } static void damon_sysfs_probe_rm_dirs(struct damon_sysfs_probe *probe) { + if (probe->preps) + kobject_put(&probe->preps->kobj); if (probe->filters) { damon_sysfs_filters_rm_dirs(probe->filters); kobject_put(&probe->filters->kobj); -- 2.47.3