f2fs: add f2fs_ioc_get_compress_blocks

This patch adds f2fs_ioc_get_compress_blocks() to provide a common
f2fs_get_compress_blocks().

Signed-off-by: Sheng Yong <shengyong@oppo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index b8a6267d9800495e0202454f3f2f6b38197d4224..95b92a6ca19f66d5e02e19cf2589a932731b4d9f 100644 (file)
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -3377,18 +3377,29 @@ out:
        return err;
 }
 
-static int f2fs_get_compress_blocks(struct file *filp, unsigned long arg)
+static int f2fs_get_compress_blocks(struct inode *inode, __u64 *blocks)
 {
-       struct inode *inode = file_inode(filp);
-       __u64 blocks;
-
        if (!f2fs_sb_has_compression(F2FS_I_SB(inode)))
                return -EOPNOTSUPP;
 
        if (!f2fs_compressed_file(inode))
                return -EINVAL;
 
-       blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks);
+       *blocks = atomic_read(&F2FS_I(inode)->i_compr_blocks);
+
+       return 0;
+}
+
+static int f2fs_ioc_get_compress_blocks(struct file *filp, unsigned long arg)
+{
+       struct inode *inode = file_inode(filp);
+       __u64 blocks;
+       int ret;
+
+       ret = f2fs_get_compress_blocks(inode, &blocks);
+       if (ret < 0)
+               return ret;
+
        return put_user(blocks, (u64 __user *)arg);
 }
 
@@ -4240,7 +4251,7 @@ static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
        case FS_IOC_SETFSLABEL:
                return f2fs_ioc_setfslabel(filp, arg);
        case F2FS_IOC_GET_COMPRESS_BLOCKS:
-               return f2fs_get_compress_blocks(filp, arg);
+               return f2fs_ioc_get_compress_blocks(filp, arg);
        case F2FS_IOC_RELEASE_COMPRESS_BLOCKS:
                return f2fs_release_compress_blocks(filp, arg);
        case F2FS_IOC_RESERVE_COMPRESS_BLOCKS: