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afs: Enable multipage folio support 

Enable multipage folio support for the afs filesystem.

Support has already been implemented in netfslib, fscache and cachefiles
and in most of afs, but I've waited for Matthew Wilcox's latest folio
changes.

Note that it does require a change to afs_write_begin() to return the
correct subpage.  This is a "temporary" change as we're working on
getting rid of the need for ->write_begin() and ->write_end()
completely, at least as far as network filesystems are concerned - but
it doesn't prevent afs from making use of the capability.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Tested-by: kafs-testing@auristor.com
Cc: Marc Dionne <marc.dionne@auristor.com>
Cc: linux-afs@lists.infradead.org
Link: https://lore.kernel.org/lkml/2274528.1645833226@warthog.procyon.org.uk/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells 2022-08-10 18:52:47 +01:00 committed by Linus Torvalds
parent f6eb0fed6a
commit 8549a26308
2 changed files with 3 additions and 1 deletions
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2
fs/afs/inode.c
View File

@ -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. */

2
fs/afs/write.c
View File

@ -91,7 +91,7 @@ try_again:
goto flush_conflicting_write;
}
*_page = &folio->page;
*_page = folio_file_page(folio, pos / PAGE_SIZE);
_leave(" = 0");
return 0;