expand __fuse_direct_write() in both callers

it's actually shorter that way *and* later we'll want iocb in scope
of generic_write_check() caller.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index aea87d2..727e139 100644 (file)
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1407,32 +1407,12 @@ static ssize_t fuse_direct_read_iter(struct kiocb *iocb, struct iov_iter *to)
        return __fuse_direct_read(&io, to, &iocb->ki_pos);
 }
 
-static ssize_t __fuse_direct_write(struct fuse_io_priv *io,
-                                  struct iov_iter *iter,
-                                  loff_t *ppos)
-{
-       struct file *file = io->file;
-       struct inode *inode = file_inode(file);
-       size_t count = iov_iter_count(iter);
-       ssize_t res;
-
-
-       res = generic_write_checks(file, ppos, &count, 0);
-       if (!res) {
-               iov_iter_truncate(iter, count);
-               res = fuse_direct_io(io, iter, ppos, FUSE_DIO_WRITE);
-       }
-
-       fuse_invalidate_attr(inode);
-
-       return res;
-}
-
 static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
        struct file *file = iocb->ki_filp;
        struct inode *inode = file_inode(file);
        struct fuse_io_priv io = { .async = 0, .file = file };
+       size_t count = iov_iter_count(from);
        ssize_t res;
 
        if (is_bad_inode(inode))
@@ -1440,7 +1420,12 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
 
        /* Don't allow parallel writes to the same file */
        mutex_lock(&inode->i_mutex);
-       res = __fuse_direct_write(&io, from, &iocb->ki_pos);
+       res = generic_write_checks(file, &iocb->ki_pos, &count, 0);
+       if (!res) {
+               iov_iter_truncate(from, count);
+               res = fuse_direct_io(&io, from, &iocb->ki_pos, FUSE_DIO_WRITE);
+       }
+       fuse_invalidate_attr(inode);
        if (res > 0)
                fuse_write_update_size(inode, iocb->ki_pos);
        mutex_unlock(&inode->i_mutex);
@@ -2855,10 +2840,17 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
        if (io->async && is_sync_kiocb(iocb))
                io->done = &wait;
 
-       if (rw == WRITE)
-               ret = __fuse_direct_write(io, iter, &pos);
-       else
+       if (rw == WRITE) {
+               ret = generic_write_checks(file, &pos, &count, 0);
+               if (!ret) {
+                       iov_iter_truncate(iter, count);
+                       ret = fuse_direct_io(io, iter, &pos, FUSE_DIO_WRITE);
+               }
+
+               fuse_invalidate_attr(inode);
+       } else {
                ret = __fuse_direct_read(io, iter, &pos);
+       }
 
        if (io->async) {
                fuse_aio_complete(io, ret < 0 ? ret : 0, -1);