Commit 7f4796a4 authored by Josef Bacik's avatar Josef Bacik Committed by Jan Kara
Browse files

xfs: add pre-content fsnotify hook for DAX faults 



xfs has it's own handling for DAX faults, so we need to add the
pre-content fsnotify hook for this case. Other faults go through
filemap_fault so they're handled properly there.

Signed-off-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
Link: https://patch.msgid.link/9eccdf59a65b72f0a1a5e2f2b9bff8eda2d4f2d9.1731684329.git.josef@toxicpanda.com
parent 8392bc2f

fs/xfs/xfs_file.c

+13 −0
Original line number Diff line number Diff line
@@ -1443,6 +1443,9 @@ xfs_dax_read_fault( 


	trace_xfs_read_fault(ip, order);



	ret = filemap_fsnotify_fault(vmf);

	if (unlikely(ret))

		return ret;

	xfs_ilock(ip, XFS_MMAPLOCK_SHARED);

	ret = xfs_dax_fault_locked(vmf, order, false);

	xfs_iunlock(ip, XFS_MMAPLOCK_SHARED);
@@ -1471,6 +1474,16 @@ xfs_write_fault( 
	vm_fault_t		ret;



	trace_xfs_write_fault(ip, order);

	/*

	 * Usually we get here from ->page_mkwrite callback but in case of DAX

	 * we will get here also for ordinary write fault. Handle HSM

	 * notifications for that case.

	 */

	if (IS_DAX(inode)) {

		ret = filemap_fsnotify_fault(vmf);

		if (unlikely(ret))

			return ret;

	}



	sb_start_pagefault(inode->i_sb);

	file_update_time(vmf->vma->vm_file);