static ssize_t ovl_copy_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out,
size_t len, unsigned int flags)
{
return ovl_copyfile(file_in, pos_in, file_out, pos_out, len, flags,
OVL_COPY);
}
static loff_t ovl_remap_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out,
loff_t len, unsigned int remap_flags)
{
enum ovl_copyop op;
if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
return -EINVAL;
if (remap_flags & REMAP_FILE_DEDUP)
op = OVL_DEDUPE;
else
op = OVL_CLONE;
/*
* Don't copy up because of a dedupe request, this wouldn't make sense
* most of the time (data would be duplicated instead of deduplicated).
*/
if (op == OVL_DEDUPE &&
(!ovl_inode_upper(file_inode(file_in)) ||
!ovl_inode_upper(file_inode(file_out))))
return -EPERM;
return ovl_copyfile(file_in, pos_in, file_out, pos_out, len,
remap_flags, op);
}
static int ovl_dedupe_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out, u64 len)
{
/*
* Don't copy up because of a dedupe request, this wouldn't make sense
* most of the time (data would be duplicated instead of deduplicated).
*/
if (!ovl_inode_upper(file_inode(file_in)) ||
!ovl_inode_upper(file_inode(file_out)))
return -EPERM;
return ovl_copyfile(file_in, pos_in, file_out, pos_out, len, 0,
OVL_DEDUPE);
}
static int ovl_clone_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out, u64 len)
{
return ovl_copyfile(file_in, pos_in, file_out, pos_out, len, 0,
OVL_CLONE);
}
