// SPDX-License-Identifier: GPL-2.0-or-later/* AFS caching stuff * * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) */ #include <linux/sched.h>#include "internal.h" static enum fscache_checkaux afs_vnode_cache_check_aux(void *cookie_netfs_data,						       const void *buffer,						       uint16_t buflen,						       loff_t object_size); struct fscache_netfs afs_cache_netfs = {	.name			= "afs",	.version		= 2,}; struct fscache_cookie_def afs_cell_cache_index_def = {	.name		= "AFS.cell",	.type		= FSCACHE_COOKIE_TYPE_INDEX,}; struct fscache_cookie_def afs_volume_cache_index_def = {	.name		= "AFS.volume",	.type		= FSCACHE_COOKIE_TYPE_INDEX,}; struct fscache_cookie_def afs_vnode_cache_index_def = {	.name		= "AFS.vnode",	.type		= FSCACHE_COOKIE_TYPE_DATAFILE,	.check_aux	= afs_vnode_cache_check_aux,}; /* * check that the auxiliary data indicates that the entry is still valid */static enum fscache_checkaux afs_vnode_cache_check_aux(void *cookie_netfs_data,						       const void *buffer,						       uint16_t buflen,						       loff_t object_size){	struct afs_vnode *vnode = cookie_netfs_data;	struct afs_vnode_cache_aux aux; 	_enter("{%llx,%x,%llx},%p,%u",	       vnode->fid.vnode, vnode->fid.unique, vnode->status.data_version,	       buffer, buflen); 	memcpy(&aux, buffer, sizeof(aux)); 	/* check the size of the data is what we're expecting */	if (buflen != sizeof(aux)) {		_leave(" = OBSOLETE [len %hx != %zx]", buflen, sizeof(aux));		return FSCACHE_CHECKAUX_OBSOLETE;	} 	if (vnode->status.data_version != aux.data_version) {		_leave(" = OBSOLETE [vers %llx != %llx]",		       aux.data_version, vnode->status.data_version);		return FSCACHE_CHECKAUX_OBSOLETE;	} 	_leave(" = SUCCESS");	return FSCACHE_CHECKAUX_OKAY;}