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Diffstat (limited to 'fs/ioctl.c')
-rw-r--r--fs/ioctl.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 0400297c8d72..d64f622cac8b 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -223,6 +223,7 @@ static long ioctl_file_clone(struct file *dst_file, unsigned long srcfd,
u64 off, u64 olen, u64 destoff)
{
struct fd src_file = fdget(srcfd);
+ loff_t cloned;
int ret;
if (!src_file.file)
@@ -230,7 +231,14 @@ static long ioctl_file_clone(struct file *dst_file, unsigned long srcfd,
ret = -EXDEV;
if (src_file.file->f_path.mnt != dst_file->f_path.mnt)
goto fdput;
- ret = vfs_clone_file_range(src_file.file, off, dst_file, destoff, olen);
+ cloned = vfs_clone_file_range(src_file.file, off, dst_file, destoff,
+ olen, 0);
+ if (cloned < 0)
+ ret = cloned;
+ else if (olen && cloned != olen)
+ ret = -EINVAL;
+ else
+ ret = 0;
fdput:
fdput(src_file);
return ret;