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b=IBV8y34e1SDFTcYNSUGv2W/gy5aR2qxgPVmN0IiUlAfAidFrq+qr5oASeAHKZdfwb IaI8C2oqNJPuO5DBlCwYJUPwt4ejg5nNuisqu4eDyO+RSE3HdRGBicG614qV4m+bII 5IIbNFGozteg5zkljCJPPZoJnTLZk2HqhNtd1mzIF8oJXKHmHr4/myz5PaP2IUXT48 5ilfIDRj7/wuoqlCBaz3hIyqUPC0VzJ9VKsVVkC4sxqcQb5+jxGFJri15reNTRm31K ISa9r0aUT+1HngwrdYk5T8uCcrBnOcuWk83Gwp5JgLTA5b+Rbeu8KZzkPiaObMUP1z n+lHpN5btcWhQ== 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 v2.1 09/17] mm/damon/sysfs: implement preps directory Date: Mon, 27 Jul 2026 07:38:18 -0700 Message-ID: <20260727143829.86236-10-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260727143829.86236-1-sj@kernel.org> References: <20260727143829.86236-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 667C9C000C X-Rspamd-Server: rspam01 X-Stat-Signature: fktddp4gm7hecducp3hjmdgdusbt9sem X-HE-Tag: 1785163116-9056 X-HE-Meta: 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 mbf192qP zTAt+Z9cWZB7sc7BJAzpELHJlt2to2C6IVVW7rwxwfItRNGAakXwlXIQX5WzRqvEjtDSyNAo4TuJcyBMGIA4Rv3aJC+eISXqBoC6VFPABN3T0KaD2aAfDiMdQGtUlYJMQq1DDVXN2Psk+9mQgDLlxZxxQYo5ojCRi590uJ8lon+ykgIOdQR6fx/83eGZGam9XK68hYUruL+0TsEZjBuKrnnexVl1ni0j/3KYdQSiHnLNSc9k= 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 376c6ecbd4bf3..e33070d2cbcc6 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