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Commit 586f1c39 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Add encode/decode of the layoutreturn op in DELEGRETURN 



Add XDR encoding for the layoutreturn op, and storage for the layoutreturn
arguments to the DELEGRETURN compound.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent cf805165

fs/nfs/nfs4proc.c

+41 −9
Original line number Diff line number Diff line
@@ -5608,11 +5608,15 @@ struct nfs4_delegreturndata { 
	struct nfs_fh fh;

	nfs4_stateid stateid;

	unsigned long timestamp;

	struct {

		struct nfs4_layoutreturn_args arg;

		struct nfs4_layoutreturn_res res;

		u32 roc_barrier;

		bool roc;

	} lr;

	struct nfs_fattr fattr;

	int rpc_status;

	struct inode *inode;

	bool roc;

	u32 roc_barrier;

};



static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
@@ -5623,6 +5627,32 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 
		return;



	trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);



	/* Handle Layoutreturn errors */

	if (data->args.lr_args && task->tk_status != 0) {

		switch(data->res.lr_ret) {

		default:

			data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;

			break;

		case 0:

			data->args.lr_args = NULL;

			data->res.lr_res = NULL;

			break;

		case -NFS4ERR_ADMIN_REVOKED:

		case -NFS4ERR_DELEG_REVOKED:

		case -NFS4ERR_EXPIRED:

		case -NFS4ERR_BAD_STATEID:

		case -NFS4ERR_OLD_STATEID:

		case -NFS4ERR_UNKNOWN_LAYOUTTYPE:

		case -NFS4ERR_WRONG_CRED:

			data->args.lr_args = NULL;

			data->res.lr_res = NULL;

			data->res.lr_ret = 0;

			rpc_restart_call_prepare(task);

			return;

		}

	}



	switch (task->tk_status) {

	case 0:

		renew_lease(data->res.server, data->timestamp);
@@ -5646,8 +5676,8 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 
		}

	}

	data->rpc_status = task->tk_status;

	if (data->roc && data->rpc_status == 0)

		pnfs_roc_set_barrier(data->inode, data->roc_barrier);

	if (data->lr.roc && data->rpc_status == 0)

		pnfs_roc_set_barrier(data->inode, data->lr.roc_barrier);

}



static void nfs4_delegreturn_release(void *calldata)
@@ -5656,7 +5686,7 @@ static void nfs4_delegreturn_release(void *calldata) 
	struct inode *inode = data->inode;



	if (inode) {

		if (data->roc)

		if (data->lr.roc)

			pnfs_roc_release(inode);

		nfs_iput_and_deactive(inode);

	}
@@ -5669,11 +5699,12 @@ static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 


	d_data = (struct nfs4_delegreturndata *)data;



	if (nfs4_wait_on_layoutreturn(d_data->inode, task))

	if (!d_data->args.lr_args &&

	    nfs4_wait_on_layoutreturn(d_data->inode, task))

		return;



	if (d_data->roc)

		pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);

	if (d_data->lr.roc)

		pnfs_roc_get_barrier(d_data->inode, &d_data->lr.roc_barrier);



	nfs4_setup_sequence(d_data->res.server,

			&d_data->args.seq_args,
@@ -5720,12 +5751,13 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co 
	nfs4_stateid_copy(&data->stateid, stateid);

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

	data->res.server = server;

	data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;

	nfs_fattr_init(data->res.fattr);

	data->timestamp = jiffies;

	data->rpc_status = 0;

	data->inode = nfs_igrab_and_active(inode);

	if (data->inode)

		data->roc = nfs4_roc(inode);

		data->lr.roc = nfs4_roc(inode);



	task_setup_data.callback_data = data;

	msg.rpc_argp = &data->args;

fs/nfs/nfs4xdr.c

+10 −0
Original line number Diff line number Diff line
@@ -710,11 +710,13 @@ static int nfs4_stat_to_errno(int); 
#define NFS4_enc_delegreturn_sz	(compound_encode_hdr_maxsz + \

				encode_sequence_maxsz + \

				encode_putfh_maxsz + \

				encode_layoutreturn_maxsz + \

				encode_delegreturn_maxsz + \

				encode_getattr_maxsz)

#define NFS4_dec_delegreturn_sz (compound_decode_hdr_maxsz + \

				decode_sequence_maxsz + \

				decode_putfh_maxsz + \

				decode_layoutreturn_maxsz + \

				decode_delegreturn_maxsz + \

				decode_getattr_maxsz)

#define NFS4_enc_getacl_sz	(compound_encode_hdr_maxsz + \
@@ -2683,6 +2685,8 @@ static void nfs4_xdr_enc_delegreturn(struct rpc_rqst *req, 
	encode_compound_hdr(xdr, req, &hdr);

	encode_sequence(xdr, &args->seq_args, &hdr);

	encode_putfh(xdr, args->fhandle, &hdr);

	if (args->lr_args)

		encode_layoutreturn(xdr, args->lr_args, &hdr);

	encode_getfattr(xdr, args->bitmask, &hdr);

	encode_delegreturn(xdr, args->stateid, &hdr);

	encode_nops(&hdr);
@@ -6942,6 +6946,12 @@ static int nfs4_xdr_dec_delegreturn(struct rpc_rqst *rqstp, 
	status = decode_putfh(xdr);

	if (status != 0)

		goto out;

	if (res->lr_res) {

		status = decode_layoutreturn(xdr, res->lr_res);

		res->lr_ret = status;

		if (status)

			goto out;

	}

	status = decode_getfattr(xdr, res->fattr, res->server);

	if (status != 0)

		goto out;

include/linux/nfs_xdr.h

+3 −0
Original line number Diff line number Diff line
@@ -552,12 +552,15 @@ struct nfs4_delegreturnargs { 
	const struct nfs_fh *fhandle;

	const nfs4_stateid *stateid;

	const u32 * bitmask;

	struct nfs4_layoutreturn_args *lr_args;

};



struct nfs4_delegreturnres {

	struct nfs4_sequence_res	seq_res;

	struct nfs_fattr * fattr;

	struct nfs_server *server;

	struct nfs4_layoutreturn_res *lr_res;

	int lr_ret;

};



/*