splice: lift checks from do_splice_from() into callers
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/splice.c b/fs/splice.c
index 78b3d12..cc53bd0 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1098,17 +1098,6 @@
{
ssize_t (*splice_write)(struct pipe_inode_info *, struct file *,
loff_t *, size_t, unsigned int);
- int ret;
-
- if (unlikely(!(out->f_mode & FMODE_WRITE)))
- return -EBADF;
-
- if (unlikely(out->f_flags & O_APPEND))
- return -EINVAL;
-
- ret = rw_verify_area(WRITE, out, ppos, len);
- if (unlikely(ret < 0))
- return ret;
if (out->f_op && out->f_op->splice_write)
splice_write = out->f_op->splice_write;
@@ -1303,6 +1292,16 @@
};
long ret;
+ if (unlikely(!(out->f_mode & FMODE_WRITE)))
+ return -EBADF;
+
+ if (unlikely(out->f_flags & O_APPEND))
+ return -EINVAL;
+
+ ret = rw_verify_area(WRITE, out, opos, len);
+ if (unlikely(ret < 0))
+ return ret;
+
ret = splice_direct_to_actor(in, &sd, direct_splice_actor);
if (ret > 0)
*ppos = sd.pos;
@@ -1358,6 +1357,16 @@
offset = out->f_pos;
}
+ if (unlikely(!(out->f_mode & FMODE_WRITE)))
+ return -EBADF;
+
+ if (unlikely(out->f_flags & O_APPEND))
+ return -EINVAL;
+
+ ret = rw_verify_area(WRITE, out, &offset, len);
+ if (unlikely(ret < 0))
+ return ret;
+
file_start_write(out);
ret = do_splice_from(ipipe, out, &offset, len, flags);
file_end_write(out);