linux-kernel - [PATCH] afs: Enable multipage folio support

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Date:   Sun, 03 Apr 2022 18:38:50 +0100
From:   David Howells <dhowells@...hat.com>
To:     torvalds@...ux-foundation.org
Cc:     "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        kafs-testing@...istor.com, Marc Dionne <marc.dionne@...istor.com>,
        linux-afs@...ts.infradead.org, dhowells@...hat.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] afs: Enable multipage folio support

Enable multipage folio support for the afs filesystem.  This makes use of
Matthew Wilcox's latest folio changes.

Signed-off-by: David Howells <dhowells@...hat.com>
Acked-by: Matthew Wilcox (Oracle) <willy@...radead.org>
Tested-by: kafs-testing@...istor.com
cc: Marc Dionne <marc.dionne@...istor.com>
cc: linux-afs@...ts.infradead.org
Link: https://lore.kernel.org/lkml/2274528.1645833226@warthog.procyon.org.uk/
---

 fs/afs/inode.c |    2 ++
 fs/afs/write.c |    2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 2fe402483ad5..c899977493b4 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -104,12 +104,14 @@ static int afs_inode_init_from_status(struct afs_operation *op,
 		inode->i_op	= &afs_file_inode_operations;
 		inode->i_fop	= &afs_file_operations;
 		inode->i_mapping->a_ops	= &afs_file_aops;
+		mapping_set_large_folios(inode->i_mapping);
 		break;
 	case AFS_FTYPE_DIR:
 		inode->i_mode	= S_IFDIR |  (status->mode & S_IALLUGO);
 		inode->i_op	= &afs_dir_inode_operations;
 		inode->i_fop	= &afs_dir_file_operations;
 		inode->i_mapping->a_ops	= &afs_dir_aops;
+		mapping_set_large_folios(inode->i_mapping);
 		break;
 	case AFS_FTYPE_SYMLINK:
 		/* Symlinks with a mode of 0644 are actually mountpoints. */
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 6bcf1475511b..445a79db0192 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -91,7 +91,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
 			goto flush_conflicting_write;
 	}
 
-	*_page = &folio->page;
+	*_page = folio_file_page(folio, pos / PAGE_SIZE);
 	_leave(" = 0");
 	return 0;