/* * linux/fs/nfs/callback_proc.c * * Copyright (C) 2004 Trond Myklebust * * NFSv4 callback procedures */#include <linux/nfs4.h>#include <linux/nfs_fs.h>#include "nfs4_fs.h"#include "callback.h"#include "delegation.h"#include "internal.h" #define NFSDBG_FACILITY NFSDBG_CALLBACK __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res){	struct nfs_client *clp;	struct nfs_delegation *delegation;	struct nfs_inode *nfsi;	struct inode *inode;		res->bitmap[0] = res->bitmap[1] = 0;	res->status = htonl(NFS4ERR_BADHANDLE);	clp = nfs_find_client(args->addr, 4);	if (clp == NULL)		goto out;	inode = nfs_delegation_find_inode(clp, &args->fh);	if (inode == NULL)		goto out_putclient;	nfsi = NFS_I(inode);	down_read(&nfsi->rwsem);	delegation = nfsi->delegation;	if (delegation == NULL || (delegation->type & FMODE_WRITE) == 0)		goto out_iput;	res->size = i_size_read(inode);	res->change_attr = delegation->change_attr;	if (nfsi->npages != 0)		res->change_attr++;	res->ctime = inode->i_ctime;	res->mtime = inode->i_mtime;	res->bitmap[0] = (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE) &		args->bitmap[0];	res->bitmap[1] = (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY) &		args->bitmap[1];	res->status = 0;out_iput:	up_read(&nfsi->rwsem);	iput(inode);out_putclient:	nfs_put_client(clp);out:	dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res->status));	return res->status;} __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy){	struct nfs_client *clp;	struct inode *inode;	__be32 res;		res = htonl(NFS4ERR_BADHANDLE);	clp = nfs_find_client(args->addr, 4);	if (clp == NULL)		goto out;	inode = nfs_delegation_find_inode(clp, &args->fh);	if (inode == NULL)		goto out_putclient;	/* Set up a helper thread to actually return the delegation */	switch(nfs_async_inode_return_delegation(inode, &args->stateid)) {		case 0:			res = 0;			break;		case -ENOENT:			res = htonl(NFS4ERR_BAD_STATEID);			break;		default:			res = htonl(NFS4ERR_RESOURCE);	}	iput(inode);out_putclient:	nfs_put_client(clp);out:	dprintk("%s: exit with status = %d\n", __FUNCTION__, ntohl(res));	return res;}