On Wed, May 9, 2018 at 12:24 AM, Goldwyn Rodrigues <rgoldwyn@xxxxxxx> wrote: > From: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx> > > copy_file_range calls do_splice_direct() if fs->clone_file_range > or fs->copy_file_range() is not available. However, do_splice_direct() > converts holes to zeros. Detect holes in the file_in range, and > create them in the corresponding file_out range. > > If there is already data present at the offset in file_out, attempt > to punch a hole there. If the operation is not supported, fall > back to performing splice on the whole range. > > Signed-off-by: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx> Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx> but.. > --- > fs/read_write.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++----- > 1 file changed, 55 insertions(+), 5 deletions(-) > > diff --git a/fs/read_write.c b/fs/read_write.c > index 2c9e7a5ea806..5df9d6e8ebee 100644 > --- a/fs/read_write.c > +++ b/fs/read_write.c > @@ -20,6 +20,7 @@ > #include <linux/compat.h> > #include <linux/mount.h> > #include <linux/fs.h> > +#include <linux/falloc.h> > #include "internal.h" > > #include <linux/uaccess.h> > @@ -1541,14 +1542,15 @@ COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd, > } > #endif > > -ssize_t do_copy_file_range(struct file *file_in, loff_t pos_in, > +static ssize_t do_copy_file_range(struct file *file_in, loff_t pos_in, Either make it static to begin with or non static and exported to begin with. Thanks, Amir.
