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Commit cf805165 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

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



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

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent d8434d4c

fs/nfs/nfs4proc.c

+40 −9
Original line number Diff line number Diff line
@@ -3035,10 +3035,14 @@ struct nfs4_closedata { 
	struct nfs4_state *state;

	struct nfs_closeargs arg;

	struct nfs_closeres res;

	struct {

		struct nfs4_layoutreturn_args arg;

		struct nfs4_layoutreturn_res res;

		u32 roc_barrier;

		bool roc;

	} lr;

	struct nfs_fattr fattr;

	unsigned long timestamp;

	bool roc;

	u32 roc_barrier;

};



static void nfs4_free_closedata(void *data)
@@ -3047,7 +3051,7 @@ static void nfs4_free_closedata(void *data) 
	struct nfs4_state_owner *sp = calldata->state->owner;

	struct super_block *sb = calldata->state->inode->i_sb;



	if (calldata->roc)

	if (calldata->lr.roc)

		pnfs_roc_release(calldata->state->inode);

	nfs4_put_open_state(calldata->state);

	nfs_free_seqid(calldata->arg.seqid);
@@ -3067,15 +3071,41 @@ static void nfs4_close_done(struct rpc_task *task, void *data) 
	if (!nfs4_sequence_done(task, &calldata->res.seq_res))

		return;

	trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);



	/* Handle Layoutreturn errors */

	if (calldata->arg.lr_args && task->tk_status != 0) {

		switch (calldata->res.lr_ret) {

		default:

			calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;

			break;

		case 0:

			calldata->arg.lr_args = NULL;

			calldata->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:

			calldata->arg.lr_args = NULL;

			calldata->res.lr_res = NULL;

			calldata->res.lr_ret = 0;

			rpc_restart_call_prepare(task);

			return;

		}

	}



        /* hmm. we are done with the inode, and in the process of freeing

	 * the state_owner. we keep this around to process errors

	 */

	switch (task->tk_status) {

		case 0:

			res_stateid = &calldata->res.stateid;

			if (calldata->roc)

			if (calldata->lr.roc)

				pnfs_roc_set_barrier(state->inode,

						     calldata->roc_barrier);

						     calldata->lr.roc_barrier);

			renew_lease(server, calldata->timestamp);

			break;

		case -NFS4ERR_ADMIN_REVOKED:
@@ -3151,7 +3181,7 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data) 
		goto out_no_action;

	}



	if (nfs4_wait_on_layoutreturn(inode, task)) {

	if (!calldata->arg.lr_args && nfs4_wait_on_layoutreturn(inode, task)) {

		nfs_release_seqid(calldata->arg.seqid);

		goto out_wait;

	}
@@ -3165,8 +3195,8 @@ static void nfs4_close_prepare(struct rpc_task *task, void *data) 
		else

			calldata->arg.bitmask = NULL;

	}

	if (calldata->roc)

		pnfs_roc_get_barrier(inode, &calldata->roc_barrier);

	if (calldata->lr.roc)

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



	calldata->arg.share_access =

		nfs4_map_atomic_open_share(NFS_SERVER(inode),
@@ -3250,7 +3280,8 @@ int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 
	calldata->res.fattr = &calldata->fattr;

	calldata->res.seqid = calldata->arg.seqid;

	calldata->res.server = server;

	calldata->roc = nfs4_roc(state->inode);

	calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;

	calldata->lr.roc = nfs4_roc(state->inode);

	nfs_sb_active(calldata->inode->i_sb);



	msg.rpc_argp = &calldata->arg;

fs/nfs/nfs4xdr.c

+26 −0
Original line number Diff line number Diff line
@@ -415,6 +415,8 @@ static int nfs4_stat_to_errno(int); 
#else /* CONFIG_NFS_V4_1 */

#define encode_sequence_maxsz	0

#define decode_sequence_maxsz	0

#define encode_layoutreturn_maxsz 0

#define decode_layoutreturn_maxsz 0

#endif /* CONFIG_NFS_V4_1 */



#define NFS4_enc_compound_sz	(1024)  /* XXX: large enough? */
@@ -508,11 +510,13 @@ static int nfs4_stat_to_errno(int); 
#define NFS4_enc_close_sz	(compound_encode_hdr_maxsz + \

				 encode_sequence_maxsz + \

				 encode_putfh_maxsz + \

				 encode_layoutreturn_maxsz + \

				 encode_close_maxsz + \

				 encode_getattr_maxsz)

#define NFS4_dec_close_sz	(compound_decode_hdr_maxsz + \

				 decode_sequence_maxsz + \

				 decode_putfh_maxsz + \

				 decode_layoutreturn_maxsz + \

				 decode_close_maxsz + \

				 decode_getattr_maxsz)

#define NFS4_enc_setattr_sz	(compound_encode_hdr_maxsz + \
@@ -2061,6 +2065,13 @@ static void encode_free_stateid(struct xdr_stream *xdr, 
	encode_op_hdr(xdr, OP_FREE_STATEID, decode_free_stateid_maxsz, hdr);

	encode_nfs4_stateid(xdr, &args->stateid);

}

#else

static inline void

encode_layoutreturn(struct xdr_stream *xdr,

		    const struct nfs4_layoutreturn_args *args,

		    struct compound_hdr *hdr)

{

}

#endif /* CONFIG_NFS_V4_1 */



/*
@@ -2248,6 +2259,8 @@ static void nfs4_xdr_enc_close(struct rpc_rqst *req, struct xdr_stream *xdr, 
	encode_compound_hdr(xdr, req, &hdr);

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

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

	if (args->lr_args)

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

	encode_close(xdr, args, &hdr);

	if (args->bitmask != NULL)

		encode_getfattr(xdr, args->bitmask, &hdr);
@@ -6088,6 +6101,13 @@ static int decode_free_stateid(struct xdr_stream *xdr, 
	res->status = decode_op_hdr(xdr, OP_FREE_STATEID);

	return res->status;

}

#else

static inline

int decode_layoutreturn(struct xdr_stream *xdr,

			       struct nfs4_layoutreturn_res *res)

{

	return 0;

}

#endif /* CONFIG_NFS_V4_1 */



/*
@@ -6440,6 +6460,12 @@ static int nfs4_xdr_dec_close(struct rpc_rqst *rqstp, struct xdr_stream *xdr, 
	status = decode_putfh(xdr);

	if (status)

		goto out;

	if (res->lr_res) {

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

		res->lr_ret = status;

		if (status)

			goto out;

	}

	status = decode_close(xdr, res);

	if (status != 0)

		goto out;

include/linux/nfs_xdr.h

+3 −0
Original line number Diff line number Diff line
@@ -469,6 +469,7 @@ struct nfs_closeargs { 
	fmode_t			fmode;

	u32			share_access;

	const u32 *		bitmask;

	struct nfs4_layoutreturn_args *lr_args;

};



struct nfs_closeres {
@@ -477,6 +478,8 @@ struct nfs_closeres { 
	struct nfs_fattr *	fattr;

	struct nfs_seqid *	seqid;

	const struct nfs_server *server;

	struct nfs4_layoutreturn_res *lr_res;

	int lr_ret;

};

/*

 *  * Arguments to the lock,lockt, and locku call.