diff options
Diffstat (limited to 'fs/overlayfs/copy_up.c')
| -rw-r--r-- | fs/overlayfs/copy_up.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index 36795eed40b0..f18c1a616e9e 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -153,6 +153,13 @@ static int ovl_copy_up_data(struct path *old, struct path *new, loff_t len) goto out_fput; } + /* Try to use clone_file_range to clone up within the same fs */ + error = vfs_clone_file_range(old_file, 0, new_file, 0, len); + if (!error) + goto out; + /* Couldn't clone, so now we try to copy the data */ + error = 0; + /* FIXME: copy up sparse files efficiently */ while (len) { size_t this_len = OVL_COPY_UP_CHUNK_SIZE; @@ -177,7 +184,7 @@ static int ovl_copy_up_data(struct path *old, struct path *new, loff_t len) len -= bytes; } - +out: if (!error) error = vfs_fsync(new_file, 0); fput(new_file); |