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author | SeongJae Park <sj@kernel.org> | 2022-10-27 01:59:39 +0300 |
---|---|---|
committer | Andrew Morton <akpm@linux-foundation.org> | 2022-12-01 02:01:25 +0300 |
commit | d332fe11debe69fee3de4c2d84fa0b6649678ad2 (patch) | |
tree | 393936911e6c273f31f59527841c2667841ac338 /mm/damon/sysfs-common.c | |
parent | 39240595917ec0c4f71d7b9dd7909790715968b5 (diff) | |
download | linux-d332fe11debe69fee3de4c2d84fa0b6649678ad2.tar.xz |
mm/damon/sysfs: move unsigned long range directory to common module
The implementation of unsigned long type range directories can be reused
by multiple DAMON sysfs directories including those for DAMON-based
Operation Schemes and the range of number of monitoring regions. Move the
code into the files for DAMON sysfs common logics.
Link: https://lkml.kernel.org/r/20221026225943.100429-9-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/damon/sysfs-common.c')
-rw-r--r-- | mm/damon/sysfs-common.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/mm/damon/sysfs-common.c b/mm/damon/sysfs-common.c index 9dc743868d5b..52bebf242f74 100644 --- a/mm/damon/sysfs-common.c +++ b/mm/damon/sysfs-common.c @@ -5,7 +5,103 @@ * Author: SeongJae Park <sj@kernel.org> */ +#include <linux/slab.h> + #include "sysfs-common.h" DEFINE_MUTEX(damon_sysfs_lock); +/* + * unsigned long range directory + */ + +struct damon_sysfs_ul_range *damon_sysfs_ul_range_alloc( + unsigned long min, + unsigned long max) +{ + struct damon_sysfs_ul_range *range = kmalloc(sizeof(*range), + GFP_KERNEL); + + if (!range) + return NULL; + range->kobj = (struct kobject){}; + range->min = min; + range->max = max; + + return range; +} + +static ssize_t min_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + struct damon_sysfs_ul_range *range = container_of(kobj, + struct damon_sysfs_ul_range, kobj); + + return sysfs_emit(buf, "%lu\n", range->min); +} + +static ssize_t min_store(struct kobject *kobj, struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct damon_sysfs_ul_range *range = container_of(kobj, + struct damon_sysfs_ul_range, kobj); + unsigned long min; + int err; + + err = kstrtoul(buf, 0, &min); + if (err) + return err; + + range->min = min; + return count; +} + +static ssize_t max_show(struct kobject *kobj, struct kobj_attribute *attr, + char *buf) +{ + struct damon_sysfs_ul_range *range = container_of(kobj, + struct damon_sysfs_ul_range, kobj); + + return sysfs_emit(buf, "%lu\n", range->max); +} + +static ssize_t max_store(struct kobject *kobj, struct kobj_attribute *attr, + const char *buf, size_t count) +{ + struct damon_sysfs_ul_range *range = container_of(kobj, + struct damon_sysfs_ul_range, kobj); + unsigned long max; + int err; + + err = kstrtoul(buf, 0, &max); + if (err) + return err; + + range->max = max; + return count; +} + +void damon_sysfs_ul_range_release(struct kobject *kobj) +{ + kfree(container_of(kobj, struct damon_sysfs_ul_range, kobj)); +} + +static struct kobj_attribute damon_sysfs_ul_range_min_attr = + __ATTR_RW_MODE(min, 0600); + +static struct kobj_attribute damon_sysfs_ul_range_max_attr = + __ATTR_RW_MODE(max, 0600); + +static struct attribute *damon_sysfs_ul_range_attrs[] = { + &damon_sysfs_ul_range_min_attr.attr, + &damon_sysfs_ul_range_max_attr.attr, + NULL, +}; +ATTRIBUTE_GROUPS(damon_sysfs_ul_range); + +struct kobj_type damon_sysfs_ul_range_ktype = { + .release = damon_sysfs_ul_range_release, + .sysfs_ops = &kobj_sysfs_ops, + .default_groups = damon_sysfs_ul_range_groups, +}; + |