Commit 9483e7d5 authored by Vivek Goyal's avatar Vivek Goyal Committed by Miklos Szeredi
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virtiofs: define dax address space operations 



This is done along the lines of ext4 and xfs.  I primarily wanted
->writepages hook at this time so that I could call into
dax_writeback_mapping_range().  This in turn will decide which pfns need to
be written back.

Signed-off-by: default avatarVivek Goyal <vgoyal@redhat.com>
Signed-off-by: default avatarMiklos Szeredi <mszeredi@redhat.com>
parent 2a9a609a

fs/fuse/dax.c

+18 −0
Original line number Diff line number Diff line
@@ -575,6 +575,16 @@ out: 
	return ret;

}



static int fuse_dax_writepages(struct address_space *mapping,

			       struct writeback_control *wbc)

{



	struct inode *inode = mapping->host;

	struct fuse_conn *fc = get_fuse_conn(inode);



	return dax_writeback_mapping_range(mapping, fc->dax->dev, wbc);

}



static vm_fault_t __fuse_dax_fault(struct vm_fault *vmf,

				   enum page_entry_size pe_size, bool write)

{
@@ -741,6 +751,13 @@ bool fuse_dax_inode_alloc(struct super_block *sb, struct fuse_inode *fi) 
	return true;

}



static const struct address_space_operations fuse_dax_file_aops  = {

	.writepages	= fuse_dax_writepages,

	.direct_IO	= noop_direct_IO,

	.set_page_dirty	= noop_set_page_dirty,

	.invalidatepage	= noop_invalidatepage,

};



void fuse_dax_inode_init(struct inode *inode)

{

	struct fuse_conn *fc = get_fuse_conn(inode);
@@ -749,6 +766,7 @@ void fuse_dax_inode_init(struct inode *inode) 
		return;



	inode->i_flags |= S_DAX;

	inode->i_data.a_ops = &fuse_dax_file_aops;

}



bool fuse_dax_check_alignment(struct fuse_conn *fc, unsigned int map_alignment)

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