diff options
Diffstat (limited to 'fs/btrfs/sysfs.c')
| -rw-r--r-- | fs/btrfs/sysfs.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 0168bc12875e..eac0155bf8c7 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -426,11 +426,42 @@ static ssize_t btrfs_discard_kbps_limit_store(struct kobject *kobj, BTRFS_ATTR_RW(discard, kbps_limit, btrfs_discard_kbps_limit_show, btrfs_discard_kbps_limit_store); +static ssize_t btrfs_discard_max_discard_size_show(struct kobject *kobj, + struct kobj_attribute *a, + char *buf) +{ + struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); + + return snprintf(buf, PAGE_SIZE, "%llu\n", + READ_ONCE(fs_info->discard_ctl.max_discard_size)); +} + +static ssize_t btrfs_discard_max_discard_size_store(struct kobject *kobj, + struct kobj_attribute *a, + const char *buf, size_t len) +{ + struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); + struct btrfs_discard_ctl *discard_ctl = &fs_info->discard_ctl; + u64 max_discard_size; + int ret; + + ret = kstrtou64(buf, 10, &max_discard_size); + if (ret) + return -EINVAL; + + WRITE_ONCE(discard_ctl->max_discard_size, max_discard_size); + + return len; +} +BTRFS_ATTR_RW(discard, max_discard_size, btrfs_discard_max_discard_size_show, + btrfs_discard_max_discard_size_store); + static const struct attribute *discard_debug_attrs[] = { BTRFS_ATTR_PTR(discard, discardable_bytes), BTRFS_ATTR_PTR(discard, discardable_extents), BTRFS_ATTR_PTR(discard, iops_limit), BTRFS_ATTR_PTR(discard, kbps_limit), + BTRFS_ATTR_PTR(discard, max_discard_size), NULL, }; |