diff options
Diffstat (limited to 'fs/erofs/sysfs.c')
| -rw-r--r-- | fs/erofs/sysfs.c | 47 |
1 files changed, 23 insertions, 24 deletions
diff --git a/fs/erofs/sysfs.c b/fs/erofs/sysfs.c index 435e515c0792..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; } @@ -205,34 +222,16 @@ static struct kobject erofs_feat = { int erofs_register_sysfs(struct super_block *sb) { struct erofs_sb_info *sbi = EROFS_SB(sb); - char *name; - char *str = NULL; int err; - if (erofs_is_fscache_mode(sb)) { - if (sbi->domain_id) { - str = kasprintf(GFP_KERNEL, "%s,%s", sbi->domain_id, - sbi->fsid); - if (!str) - return -ENOMEM; - name = str; - } else { - name = sbi->fsid; - } - } else { - name = sb->s_id; - } sbi->s_kobj.kset = &erofs_root; init_completion(&sbi->s_kobj_unregister); - err = kobject_init_and_add(&sbi->s_kobj, &erofs_sb_ktype, NULL, "%s", name); - kfree(str); - if (err) - goto put_sb_kobj; - return 0; - -put_sb_kobj: - kobject_put(&sbi->s_kobj); - wait_for_completion(&sbi->s_kobj_unregister); + err = kobject_init_and_add(&sbi->s_kobj, &erofs_sb_ktype, NULL, "%s", + sb->s_sysfs_name); + if (err) { + kobject_put(&sbi->s_kobj); + wait_for_completion(&sbi->s_kobj_unregister); + } return err; } |