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bh=5c6monTkHFptnJUFGVWxm0WfYIjXGBI118GDWY/b424=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bDYv5s3xbVH+cAMBWN79DdYCzSB1wVAZmOj53dHrzr5tNpMNBN8VMPY/t/DEKrB+Y hRb2v0BwOAudikrb9NOLGgDn7KSP6tU8HwzKzjvqNFMugk9iWRxAduZoT2mKJyeU9k +JPPgRRCxeOLge5Z+hRVNqQ1JyMROQWRu0kvbBcib8nlf7MpgbASGKZFAxuKsUo2Tb dH3uO12QBC+BEomWN/1FPZMMAeGacQcogy/XnDw7k1tXJVzVwjXKv4+iFlVaTC3B72 fzduUMIihIzqRmwvxGjwER2CpCBEpxYQGHTuQZSyG01kExlmKkf2q/wH2yiCAz+IWh ZUerOJnoJge0Q== 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 04/27] mm/damon/sysfs: add admin/reports/ directory Date: Sun, 15 Nov 2026 12:28:22 -0800 Message-ID: <20261115202849.99134-5-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261115202849.99134-1-sj@kernel.org> References: <20261115202849.99134-1-sj@kernel.org> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: axtufx64kraq65yz8gfkapg9r3s5b4ue X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 91B4C40005 X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_PASS, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1794774544-48017 X-HE-Meta: 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 Pm0MuiM3 Oq+rBXljLhApraFVHZh7dMk9n0Th6luEkhDh8ecYruDZfeLbYynVkJB5oZYtfewIFvPRo899BFVNqikEkOXH/dFT0ZQ0RQa9RxTiBO+Ml7ufVtRi7AgOfzGc3Ef+dl8xHkQse9leoz8WxF2w+yACa5bLTDYfLQRlVbq4q7rzx0VjYwNIJN1Wt8x9O1QcGkvlDkuqSeMRhk7ZRxJ25/ezHaH0RCz682GktLYtv2mcqkixG1dY= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Add a new sysfs directory, reports/, as a place holder for sysfs files that will be used for controlling the data attribute report system. Put the directory under the admin/ directory, next to kdamonds/ directory. Signed-off-by: SJ Park --- mm/damon/sysfs.c | 63 +++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 59 insertions(+), 4 deletions(-) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 779c98205a94b..76850a4b5b5a7 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -2979,6 +2979,38 @@ static const struct kobj_type damon_sysfs_kdamonds_ktype = { .default_groups = damon_sysfs_kdamonds_groups, }; +/* reports dir */ + +struct damon_sysfs_reports { + struct kobject kobj; +}; + +static struct damon_sysfs_reports *damon_sysfs_reports_alloc(void) +{ + return kzalloc_obj(struct damon_sysfs_reports); +} + +static int damon_sysfs_reports_add_dirs(struct damon_sysfs_reports *reports) +{ + return 0; +} + +static void damon_sysfs_reports_release(struct kobject *kobj) +{ + kfree(container_of(kobj, struct damon_sysfs_reports, kobj)); +} + +static struct attribute *damon_sysfs_reports_attrs[] = { + NULL, +}; +ATTRIBUTE_GROUPS(damon_sysfs_reports); + +static const struct kobj_type damon_sysfs_reports_ktype = { + .release = damon_sysfs_reports_release, + .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damon_sysfs_reports_groups, +}; + /* * damon user interface directory */ @@ -2986,6 +3018,7 @@ static const struct kobj_type damon_sysfs_kdamonds_ktype = { struct damon_sysfs_ui_dir { struct kobject kobj; struct damon_sysfs_kdamonds *kdamonds; + struct damon_sysfs_reports *reports; }; static struct damon_sysfs_ui_dir *damon_sysfs_ui_dir_alloc(void) @@ -2996,6 +3029,7 @@ static struct damon_sysfs_ui_dir *damon_sysfs_ui_dir_alloc(void) static int damon_sysfs_ui_dir_add_dirs(struct damon_sysfs_ui_dir *ui_dir) { struct damon_sysfs_kdamonds *kdamonds; + struct damon_sysfs_reports *reports; int err; kdamonds = damon_sysfs_kdamonds_alloc(); @@ -3005,11 +3039,32 @@ static int damon_sysfs_ui_dir_add_dirs(struct damon_sysfs_ui_dir *ui_dir) err = kobject_init_and_add(&kdamonds->kobj, &damon_sysfs_kdamonds_ktype, &ui_dir->kobj, "kdamonds"); - if (err) { - kobject_put(&kdamonds->kobj); - return err; - } + if (err) + goto put_kdamonds_out; ui_dir->kdamonds = kdamonds; + + reports = damon_sysfs_reports_alloc(); + if (!reports) { + err = -ENOMEM; + goto put_kdamonds_out; + } + ui_dir->reports = reports; + + err = kobject_init_and_add(&reports->kobj, &damon_sysfs_reports_ktype, + &ui_dir->kobj, "reports"); + if (err) + goto put_reports_out; + err = damon_sysfs_reports_add_dirs(reports); + if (err) + goto put_reports_out; + return err; + +put_reports_out: + kobject_put(&reports->kobj); + ui_dir->reports = NULL; +put_kdamonds_out: + kobject_put(&kdamonds->kobj); + ui_dir->kdamonds = NULL; return err; } -- 2.47.3