netdev - [RFC PATCH 18/53] netfs: Add a hook to allow tell the netfs to update its i

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Date: Fri, 13 Oct 2023 17:03:47 +0100
From: David Howells <dhowells@...hat.com>
To: Jeff Layton <jlayton@...nel.org>,
	Steve French <smfrench@...il.com>
Cc: David Howells <dhowells@...hat.com>,
	Matthew Wilcox <willy@...radead.org>,
	Marc Dionne <marc.dionne@...istor.com>,
	Paulo Alcantara <pc@...guebit.com>,
	Shyam Prasad N <sprasad@...rosoft.com>,
	Tom Talpey <tom@...pey.com>,
	Dominique Martinet <asmadeus@...ewreck.org>,
	Ilya Dryomov <idryomov@...il.com>,
	Christian Brauner <christian@...uner.io>,
	linux-afs@...ts.infradead.org,
	linux-cifs@...r.kernel.org,
	linux-nfs@...r.kernel.org,
	ceph-devel@...r.kernel.org,
	v9fs@...ts.linux.dev,
	linux-fsdevel@...r.kernel.org,
	linux-mm@...ck.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-cachefs@...hat.com
Subject: [RFC PATCH 18/53] 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@...hat.com>
cc: Jeff Layton <jlayton@...nel.org>
cc: linux-cachefs@...hat.com
cc: linux-fsdevel@...r.kernel.org
cc: linux-mm@...ck.org
---
 include/linux/netfs.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 4115274e3129..39b3eeefa03c 100644
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -250,6 +250,7 @@ struct netfs_request_ops {
 	void (*free_subrequest)(struct netfs_io_subrequest *rreq);
 	int (*begin_cache_operation)(struct netfs_io_request *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);
@@ -257,6 +258,9 @@ 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);
 };
 
 /*