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b=hRdfq4b2Z4RMt54O4rh/DHjSSfMRDWBJgbO2JPOqIO3JnLYnF59ElNO15mTckEh6/ rmdJs0hrf77dZBSubA5knpRrY92Pw7+7gJ03Tf0hlRwjxl6trKumdwMIw18h3TQJ0P I7z/n2kdhEHP1DCWD89OSgwpgjjrwioFLLn1VxF7ALLa0WLlv5H+H0aCLqNTzwya/2 ShQA9airxY5mc565VYqTITRVknU79aByJGmoZZsb/VVxo9ucDxwnjjkADN+dQY2L/i kDCMR1J+ATHvwqZGS0vTcT3A89Bknn61J5NgbIKDm8T0EZWVkgvpVqVLJxo+imDM7G aU4x+XAx2W5rw== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 13/28] mm/damon/sysfs: implement filter dir files Date: Mon, 18 May 2026 16:41:01 -0700 Message-ID: <20260518234119.97569-14-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260518234119.97569-1-sj@kernel.org> References: <20260518234119.97569-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 2183E40005 X-Stat-Signature: 4r4w5wernnhc3wsjp7u3sade3qioz7yb X-Rspam-User: X-HE-Tag: 1779147688-789755 X-HE-Meta: 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 BAkQCm59 LUqiGhK7+jAeJ2eZi/+Qu7JrQAJalKB301ltPOY4JM1VNVvwd/TW0+E+GkhunSv2VpVSPdrbZAAxpfZmOkqMbbmXgTwEOToUSDvQSltELBqkYrkseqLkFkPnCBwFnUUHXtCVyoPXBkFVWf4JExVPFVyfufz41QmSZdG5CjyYnePnwTLMZD3bgH3GJxEKwRD9eoBjQ5IWJZ7pP5XkMSSf7wxhtweRgQYLCDHMOW/w4Beb6hZ0= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Implement sysfs files under the data probe filter directory for letting users to configure each filter. Signed-off-by: SeongJae Park --- mm/damon/sysfs.c | 114 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) diff --git a/mm/damon/sysfs.c b/mm/damon/sysfs.c index 2dc475ea0f0f7..51a4f05c9275c 100644 --- a/mm/damon/sysfs.c +++ b/mm/damon/sysfs.c @@ -753,6 +753,9 @@ static const struct kobj_type damon_sysfs_intervals_ktype = { struct damon_sysfs_filter { struct kobject kobj; + enum damon_filter_type type; + bool matching; + bool allow; }; static struct damon_sysfs_filter *damon_sysfs_filter_alloc(void) @@ -760,6 +763,105 @@ static struct damon_sysfs_filter *damon_sysfs_filter_alloc(void) return kzalloc_obj(struct damon_sysfs_filter); } +struct damon_sysfs_filter_type_name { + enum damon_filter_type type; + char *name; +}; + +static const struct damon_sysfs_filter_type_name +damon_sysfs_filter_type_names[] = { + { + .type = DAMON_FILTER_TYPE_ANON, + .name = "anon", + }, +}; + +static ssize_t type_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + int i; + + for (i = 0; i < ARRAY_SIZE(damon_sysfs_filter_type_names); i++) { + const struct damon_sysfs_filter_type_name *type_name; + + type_name = &damon_sysfs_filter_type_names[i]; + if (type_name->type == filter->type) + return sysfs_emit(buf, "%s\n", type_name->name); + } + return -EINVAL; +} + +static ssize_t type_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + ssize_t ret = -EINVAL; + int i; + + for (i = 0; i < ARRAY_SIZE(damon_sysfs_filter_type_names); i++) { + const struct damon_sysfs_filter_type_name *type_name; + + type_name = &damon_sysfs_filter_type_names[i]; + if (sysfs_streq(buf, type_name->name)) { + filter->type = type_name->type; + ret = count; + break; + } + } + return ret; +} + +static ssize_t matching_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + + return sysfs_emit(buf, "%c\n", filter->matching ? 'Y' : 'N'); +} + +static ssize_t matching_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + bool matching; + int err = kstrtobool(buf, &matching); + + if (err) + return err; + + filter->matching = matching; + return count; +} + +static ssize_t allow_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + + return sysfs_emit(buf, "%c\n", filter->allow ? 'Y' : 'N'); +} + +static ssize_t allow_store(struct kobject *kobj, + struct kobj_attribute *attr, const char *buf, size_t count) +{ + struct damon_sysfs_filter *filter = container_of(kobj, + struct damon_sysfs_filter, kobj); + bool allow; + int err = kstrtobool(buf, &allow); + + if (err) + return err; + + filter->allow = allow; + return count; +} + static void damon_sysfs_filter_release(struct kobject *kobj) { struct damon_sysfs_filter *filter = container_of(kobj, @@ -768,7 +870,19 @@ static void damon_sysfs_filter_release(struct kobject *kobj) kfree(filter); } +static struct kobj_attribute damon_sysfs_filter_type_attr = + __ATTR_RW_MODE(type, 0600); + +static struct kobj_attribute damon_sysfs_filter_matching_attr = + __ATTR_RW_MODE(matching, 0600); + +static struct kobj_attribute damon_sysfs_filter_allow_attr = + __ATTR_RW_MODE(allow, 0600); + static struct attribute *damon_sysfs_filter_attrs[] = { + &damon_sysfs_filter_type_attr.attr, + &damon_sysfs_filter_matching_attr.attr, + &damon_sysfs_filter_allow_attr.attr, NULL, }; ATTRIBUTE_GROUPS(damon_sysfs_filter); -- 2.47.3