Commit fa178f29 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Ensure DELEGRETURN returns attributes 



 Upon return of a write delegation, the server will almost always bump the
 change attribute. Ensure that we pick up that change so that we don't
 invalidate our data cache unnecessarily.

 Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent beb2a5ec

fs/nfs/delegation.c

+0 −2
Original line number Diff line number Diff line
@@ -159,8 +159,6 @@ static int nfs_do_return_delegation(struct inode *inode, struct nfs_delegation * 
{

	int res = 0;



	__nfs_revalidate_inode(NFS_SERVER(inode), inode);



	res = nfs4_proc_delegreturn(inode, delegation->cred, &delegation->stateid);

	nfs_free_delegation(delegation);

	return res;

fs/nfs/nfs4proc.c

+13 −4
Original line number Diff line number Diff line
@@ -2920,11 +2920,12 @@ nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred) 


struct nfs4_delegreturndata {

	struct nfs4_delegreturnargs args;

	struct nfs4_delegreturnres res;

	struct nfs_fh fh;

	nfs4_stateid stateid;

	struct rpc_cred *cred;

	unsigned long timestamp;

	const struct nfs_server *server;

	struct nfs_fattr fattr;

	int rpc_status;

};
@@ -2934,8 +2935,10 @@ static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata) 
	struct rpc_message msg = {

		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],

		.rpc_argp = &data->args,

		.rpc_resp = &data->res,

		.rpc_cred = data->cred,

	};

	nfs_fattr_init(data->res.fattr);

	rpc_call_setup(task, &msg, 0);

}
@@ -2944,7 +2947,7 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 
	struct nfs4_delegreturndata *data = calldata;

	data->rpc_status = task->tk_status;

	if (data->rpc_status == 0)

		renew_lease(data->server, data->timestamp);

		renew_lease(data->res.server, data->timestamp);

}



static void nfs4_delegreturn_release(void *calldata)
@@ -2964,6 +2967,7 @@ const static struct rpc_call_ops nfs4_delegreturn_ops = { 
static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)

{

	struct nfs4_delegreturndata *data;

	struct nfs_server *server = NFS_SERVER(inode);

	struct rpc_task *task;

	int status;
@@ -2972,11 +2976,13 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co 
		return -ENOMEM;

	data->args.fhandle = &data->fh;

	data->args.stateid = &data->stateid;

	data->args.bitmask = server->attr_bitmask;

	nfs_copy_fh(&data->fh, NFS_FH(inode));

	memcpy(&data->stateid, stateid, sizeof(data->stateid));

	data->res.fattr = &data->fattr;

	data->res.server = server;

	data->cred = get_rpccred(cred);

	data->timestamp = jiffies;

	data->server = NFS_SERVER(inode);

	data->rpc_status = 0;



	task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
@@ -2985,8 +2991,11 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co 
		return PTR_ERR(task);

	}

	status = nfs4_wait_for_completion_rpc_task(task);

	if (status == 0)

	if (status == 0) {

		status = data->rpc_status;

		if (status == 0)

			nfs_post_op_update_inode(inode, &data->fattr);

	}

	rpc_release_task(task);

	return status;

}

fs/nfs/nfs4xdr.c

+22 −11
Original line number Diff line number Diff line
@@ -392,9 +392,11 @@ static int nfs_stat_to_errno(int); 
				decode_getattr_maxsz)

#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \

				encode_putfh_maxsz + \

				encode_delegreturn_maxsz)

				encode_delegreturn_maxsz + \

				encode_getattr_maxsz)

#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \

				decode_delegreturn_maxsz)

				decode_delegreturn_maxsz + \

				decode_getattr_maxsz)

#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \

				encode_putfh_maxsz + \

				encode_getattr_maxsz)
@@ -1983,14 +1985,20 @@ static int nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, uint32_t *p, const str 
{

	struct xdr_stream xdr;

	struct compound_hdr hdr = {

		.nops = 2,

		.nops = 3,

	};

	int status;



	xdr_init_encode(&xdr, &req->rq_snd_buf, p);

	encode_compound_hdr(&xdr, &hdr);

	if ((status = encode_putfh(&xdr, args->fhandle)) == 0)

	status = encode_putfh(&xdr, args->fhandle);

	if (status != 0)

		goto out;

	status = encode_delegreturn(&xdr, args->stateid);

	if (status != 0)

		goto out;

	status = encode_getfattr(&xdr, args->bitmask);

out:

	return status;

}
@@ -4184,7 +4192,7 @@ static int nfs4_xdr_dec_setclientid_confirm(struct rpc_rqst *req, uint32_t *p, s 
/*

 * DELEGRETURN request

 */

static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *dummy)

static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, struct nfs4_delegreturnres *res)

{

	struct xdr_stream xdr;

	struct compound_hdr hdr;
@@ -4192,11 +4200,14 @@ static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, uint32_t *p, void *d 


	xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, p);

	status = decode_compound_hdr(&xdr, &hdr);

	if (status == 0) {

	if (status != 0)

		goto out;

	status = decode_putfh(&xdr);

		if (status == 0)

	if (status != 0)

		goto out;

	status = decode_delegreturn(&xdr);

	}

	decode_getfattr(&xdr, res->fattr, res->server);

out:

	return status;

}

include/linux/nfs_xdr.h

+6 −0
Original line number Diff line number Diff line
@@ -220,6 +220,12 @@ struct nfs_lockt_res { 
struct nfs4_delegreturnargs {

	const struct nfs_fh *fhandle;

	const nfs4_stateid *stateid;

	const u32 * bitmask;

};



struct nfs4_delegreturnres {

	struct nfs_fattr * fattr;

	const struct nfs_server *server;

};



/*

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