diff options
Diffstat (limited to 'fs/erofs/sysfs.c')
| -rw-r--r-- | fs/erofs/sysfs.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/erofs/sysfs.c b/fs/erofs/sysfs.c index 63cffd0fd261..19d586273b70 100644 --- a/fs/erofs/sysfs.c +++ b/fs/erofs/sysfs.c @@ -10,6 +10,7 @@ enum { attr_feature, + attr_drop_caches, attr_pointer_ui, attr_pointer_bool, }; @@ -57,11 +58,13 @@ static struct erofs_attr erofs_attr_##_name = { \ #ifdef CONFIG_EROFS_FS_ZIP EROFS_ATTR_RW_UI(sync_decompress, erofs_mount_opts); +EROFS_ATTR_FUNC(drop_caches, 0200); #endif static struct attribute *erofs_attrs[] = { #ifdef CONFIG_EROFS_FS_ZIP ATTR_LIST(sync_decompress), + ATTR_LIST(drop_caches), #endif NULL, }; @@ -163,6 +166,20 @@ static ssize_t erofs_attr_store(struct kobject *kobj, struct attribute *attr, return -EINVAL; *(bool *)ptr = !!t; return len; +#ifdef CONFIG_EROFS_FS_ZIP + case attr_drop_caches: + ret = kstrtoul(skip_spaces(buf), 0, &t); + if (ret) + return ret; + if (t < 1 || t > 3) + return -EINVAL; + + if (t & 2) + z_erofs_shrink_scan(sbi, ~0UL); + if (t & 1) + invalidate_mapping_pages(MNGD_MAPPING(sbi), 0, -1); + return len; +#endif } return 0; } |