afs: Use alternative invalidation to using launder_folio

Use writepages-based flushing invalidation instead of
invalidate_inode_pages2() and ->launder_folio().  This will allow
->launder_folio() to be removed eventually.
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-afs@lists.infradead.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org

fs/afs/file.c

@@ -54,7 +54,6 @@ const struct address_space_operations afs_file_aops = {
 	.read_folio	= netfs_read_folio,
 	.readahead	= netfs_readahead,
 	.dirty_folio	= netfs_dirty_folio,
-	.launder_folio	= netfs_launder_folio,
 	.release_folio	= netfs_release_folio,
 	.invalidate_folio = netfs_invalidate_folio,
 	.migrate_folio	= filemap_migrate_folio,

fs/afs/internal.h

@@ -916,7 +916,6 @@ struct afs_operation {
 			loff_t	pos;
 			loff_t	size;
 			loff_t	i_size;
-			bool	laundering;	/* Laundering page, PG_writeback not set */
 		} store;
 		struct {
 			struct iattr	*attr;

fs/afs/validation.c

@@ -365,9 +365,9 @@ static void afs_zap_data(struct afs_vnode *vnode)
 	 * written back in a regular file and completely discard the pages in a
 	 * directory or symlink */
 	if (S_ISREG(vnode->netfs.inode.i_mode))
-		invalidate_remote_inode(&vnode->netfs.inode);
+		filemap_invalidate_inode(&vnode->netfs.inode, true, 0, LLONG_MAX);
 	else
-		invalidate_inode_pages2(vnode->netfs.inode.i_mapping);
+		filemap_invalidate_inode(&vnode->netfs.inode, false, 0, LLONG_MAX);
 }
 
 /*

fs/afs/write.c

@@ -75,7 +75,6 @@ static void afs_store_data_success(struct afs_operation *op)
 	op->ctime = op->file[0].scb.status.mtime_client;
 	afs_vnode_commit_status(op, &op->file[0]);
 	if (!afs_op_error(op)) {
-		if (!op->store.laundering)
 		afs_pages_written_back(vnode, op->store.pos, op->store.size);
 		afs_stat_v(vnode, n_stores);
 		atomic_long_add(op->store.size, &afs_v2net(vnode)->n_store_bytes);
@@ -91,8 +90,7 @@ static const struct afs_operation_ops afs_store_data_operation = {
 /*
  * write to a file
  */
-static int afs_store_data(struct afs_vnode *vnode, struct iov_iter *iter, loff_t pos,
-			  bool laundering)
+static int afs_store_data(struct afs_vnode *vnode, struct iov_iter *iter, loff_t pos)
 {
 	struct afs_operation *op;
 	struct afs_wb_key *wbk = NULL;
@@ -123,7 +121,6 @@ static int afs_store_data(struct afs_vnode *vnode, struct iov_iter *iter, loff_t
 	op->file[0].modification = true;
 	op->store.pos = pos;
 	op->store.size = size;
-	op->store.laundering = laundering;
 	op->flags |= AFS_OPERATION_UNINTR;
 	op->ops = &afs_store_data_operation;
 
@@ -168,8 +165,7 @@ static void afs_upload_to_server(struct netfs_io_subrequest *subreq)
 	       subreq->rreq->debug_id, subreq->debug_index, subreq->io_iter.count);
 
 	trace_netfs_sreq(subreq, netfs_sreq_trace_submit);
-	ret = afs_store_data(vnode, &subreq->io_iter, subreq->start,
-			     subreq->rreq->origin == NETFS_LAUNDER_WRITE);
+	ret = afs_store_data(vnode, &subreq->io_iter, subreq->start);
 	netfs_write_subrequest_terminated(subreq, ret < 0 ? ret : subreq->len,
 					  false);
 }