netfs: Add a hook to allow tell the netfs to update its i_size

Add a hook for netfslib's write helpers to call to tell the network
filesystem that it should update its i_size.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org

diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index f302123..3fc41f6 100644 (file)
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -242,6 +242,7 @@ struct netfs_request_ops {
        void (*free_request)(struct netfs_io_request *rreq);
        void (*free_subrequest)(struct netfs_io_subrequest *rreq);
 
+       /* Read request handling */
        void (*expand_readahead)(struct netfs_io_request *rreq);
        bool (*clamp_length)(struct netfs_io_subrequest *subreq);
        void (*issue_read)(struct netfs_io_subrequest *subreq);
@@ -249,6 +250,9 @@ struct netfs_request_ops {
        int (*check_write_begin)(struct file *file, loff_t pos, unsigned len,
                                 struct folio **foliop, void **_fsdata);
        void (*done)(struct netfs_io_request *rreq);
+
+       /* Modification handling */
+       void (*update_i_size)(struct inode *inode, loff_t i_size);
 };
 
 /*