On 2019/5/17 10:56, Matthew Wilcox wrote:
> On Fri, May 17, 2019 at 10:16:47AM +0800, sunqiuyang wrote:
>> +++ b/fs/f2fs/f2fs.h
>> @@ -423,6 +423,8 @@ static inline bool __has_cursum_space(struct
>> f2fs_journal *journal,
>> #define F2FS_IOC_SET_PIN_FILE _IOW(F2FS_IOCTL_MAGIC, 13,
>> __u32)
>> #define F2FS_IOC_GET_PIN_FILE _IOR(F2FS_IOCTL_MAGIC, 14,
>> __u32)
>> #define F2FS_IOC_PRECACHE_EXTENTS _IO(F2FS_IOCTL_MAGIC, 15)
>> +#define F2FS_IOC_SHRINK_RESIZE _IOW(F2FS_IOCTL_MAGIC, 16,
>> \
>> + struct f2fs_resize_param)
>
> Why not match ext4?
>
> fs/ext4/ext4.h:#define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64)
Agreed, Qiuyang, could you consider to implement this interface as ext4's, in
addition, changing parameter from shrunk bytes to new block count of fs?
F2FS_IOC_RESIZE_FS _IOW('f', 16, __u64)
if (copy_from_user(&block_count, (__u64 __user *)arg, sizeof(__u64)))
Thanks,
>
> .
>
