nfs4xdr.c

static void encode_getfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(OP_GETFH);
	hdr->nops++;
	hdr->replen += decode_getfh_maxsz;
}

static void encode_link(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(8 + name->len);
	*p++ = cpu_to_be32(OP_LINK);
	*p++ = cpu_to_be32(name->len);
	p = xdr_encode_opaque_fixed(p, name->name, name->len);
	hdr->nops++;
	hdr->replen += decode_link_maxsz;
}

static inline int nfs4_lock_type(struct file_lock *fl, int block)
{
	if ((fl->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) == F_RDLCK)
		return block ? NFS4_READW_LT : NFS4_READ_LT;
	return block ? NFS4_WRITEW_LT : NFS4_WRITE_LT;
}

static inline uint64_t nfs4_lock_length(struct file_lock *fl)
{
	if (fl->fl_end == OFFSET_MAX)
		return ~(uint64_t)0;
	return fl->fl_end - fl->fl_start + 1;
}

/*
 * opcode,type,reclaim,offset,length,new_lock_owner = 32
 * open_seqid,open_stateid,lock_seqid,lock_owner.clientid, lock_owner.id = 40
 */
static void encode_lock(struct xdr_stream *xdr, const struct nfs_lock_args *args, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(32);
	*p++ = cpu_to_be32(OP_LOCK);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, args->block));
	*p++ = cpu_to_be32(args->reclaim);
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
	*p++ = cpu_to_be32(args->new_lock_owner);
	if (args->new_lock_owner){
		RESERVE_SPACE(4+NFS4_STATEID_SIZE+32);
		*p++ = cpu_to_be32(args->open_seqid->sequence->counter);
		p = xdr_encode_opaque_fixed(p, args->open_stateid->data, NFS4_STATEID_SIZE);
		*p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
		p = xdr_encode_hyper(p, args->lock_owner.clientid);
		*p++ = cpu_to_be32(16);
		p = xdr_encode_opaque_fixed(p, "lock id:", 8);
		p = xdr_encode_hyper(p, args->lock_owner.id);
	}
	else {
		RESERVE_SPACE(NFS4_STATEID_SIZE+4);
		p = xdr_encode_opaque_fixed(p, args->lock_stateid->data, NFS4_STATEID_SIZE);
		*p++ = cpu_to_be32(args->lock_seqid->sequence->counter);
	}
	hdr->nops++;
	hdr->replen += decode_lock_maxsz;
}

static void encode_lockt(struct xdr_stream *xdr, const struct nfs_lockt_args *args, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(52);
	*p++ = cpu_to_be32(OP_LOCKT);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
	p = xdr_encode_hyper(p, args->lock_owner.clientid);
	*p++ = cpu_to_be32(16);
	p = xdr_encode_opaque_fixed(p, "lock id:", 8);
	p = xdr_encode_hyper(p, args->lock_owner.id);
	hdr->nops++;
	hdr->replen += decode_lockt_maxsz;
}

static void encode_locku(struct xdr_stream *xdr, const struct nfs_locku_args *args, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(12+NFS4_STATEID_SIZE+16);
	*p++ = cpu_to_be32(OP_LOCKU);
	*p++ = cpu_to_be32(nfs4_lock_type(args->fl, 0));
	*p++ = cpu_to_be32(args->seqid->sequence->counter);
	p = xdr_encode_opaque_fixed(p, args->stateid->data, NFS4_STATEID_SIZE);
	p = xdr_encode_hyper(p, args->fl->fl_start);
	p = xdr_encode_hyper(p, nfs4_lock_length(args->fl));
	hdr->nops++;
	hdr->replen += decode_locku_maxsz;
}

static void encode_lookup(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
	int len = name->len;
	__be32 *p;

	RESERVE_SPACE(8 + len);
	*p++ = cpu_to_be32(OP_LOOKUP);
	*p++ = cpu_to_be32(len);
	p = xdr_encode_opaque_fixed(p, name->name, len);
	hdr->nops++;
	hdr->replen += decode_lookup_maxsz;
}

static void encode_share_access(struct xdr_stream *xdr, fmode_t fmode)
{
	__be32 *p;

	RESERVE_SPACE(8);
	switch (fmode & (FMODE_READ|FMODE_WRITE)) {
	case FMODE_READ:
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_READ);
		break;
	case FMODE_WRITE:
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_WRITE);
		break;
	case FMODE_READ|FMODE_WRITE:
		*p++ = cpu_to_be32(NFS4_SHARE_ACCESS_BOTH);
		break;
	default:
		*p++ = cpu_to_be32(0);
	}
	*p++ = cpu_to_be32(0);		/* for linux, share_deny = 0 always */
}

static inline void encode_openhdr(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
	__be32 *p;
 /*
 * opcode 4, seqid 4, share_access 4, share_deny 4, clientid 8, ownerlen 4,
 * owner 4 = 32
 */
	RESERVE_SPACE(8);
	*p++ = cpu_to_be32(OP_OPEN);
	*p++ = cpu_to_be32(arg->seqid->sequence->counter);
	encode_share_access(xdr, arg->fmode);
	RESERVE_SPACE(28);
	p = xdr_encode_hyper(p, arg->clientid);
	*p++ = cpu_to_be32(16);
	p = xdr_encode_opaque_fixed(p, "open id:", 8);
	p = xdr_encode_hyper(p, arg->id);
}

static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
	__be32 *p;

	RESERVE_SPACE(4);
	switch(arg->open_flags & O_EXCL) {
	case 0:
		*p++ = cpu_to_be32(NFS4_CREATE_UNCHECKED);
		encode_attrs(xdr, arg->u.attrs, arg->server);
		break;
	default:
		*p++ = cpu_to_be32(NFS4_CREATE_EXCLUSIVE);
		encode_nfs4_verifier(xdr, &arg->u.verifier);
	}
}

static void encode_opentype(struct xdr_stream *xdr, const struct nfs_openargs *arg)
{
	__be32 *p;

	RESERVE_SPACE(4);
	switch (arg->open_flags & O_CREAT) {
	case 0:
		*p++ = cpu_to_be32(NFS4_OPEN_NOCREATE);
		break;
	default:
		BUG_ON(arg->claim != NFS4_OPEN_CLAIM_NULL);
		*p++ = cpu_to_be32(NFS4_OPEN_CREATE);
		encode_createmode(xdr, arg);
	}
}

static inline void encode_delegation_type(struct xdr_stream *xdr, fmode_t delegation_type)
{
	__be32 *p;

	RESERVE_SPACE(4);
	switch (delegation_type) {
	case 0:
		*p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_NONE);
		break;
	case FMODE_READ:
		*p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_READ);
		break;
	case FMODE_WRITE|FMODE_READ:
		*p++ = cpu_to_be32(NFS4_OPEN_DELEGATE_WRITE);
		break;
	default:
		BUG();
	}
}

static inline void encode_claim_null(struct xdr_stream *xdr, const struct qstr *name)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(NFS4_OPEN_CLAIM_NULL);
	encode_string(xdr, name->len, name->name);
}

static inline void encode_claim_previous(struct xdr_stream *xdr, fmode_t type)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(NFS4_OPEN_CLAIM_PREVIOUS);
	encode_delegation_type(xdr, type);
}

static inline void encode_claim_delegate_cur(struct xdr_stream *xdr, const struct qstr *name, const nfs4_stateid *stateid)
{
	__be32 *p;

	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
	*p++ = cpu_to_be32(NFS4_OPEN_CLAIM_DELEGATE_CUR);
	p = xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
	encode_string(xdr, name->len, name->name);
}

static void encode_open(struct xdr_stream *xdr, const struct nfs_openargs *arg, struct compound_hdr *hdr)
{
	encode_openhdr(xdr, arg);
	encode_opentype(xdr, arg);
	switch (arg->claim) {
	case NFS4_OPEN_CLAIM_NULL:
		encode_claim_null(xdr, arg->name);
		break;
	case NFS4_OPEN_CLAIM_PREVIOUS:
		encode_claim_previous(xdr, arg->u.delegation_type);
		break;
	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
		encode_claim_delegate_cur(xdr, arg->name, &arg->u.delegation);
		break;
	default:
		BUG();
	}
	hdr->nops++;
	hdr->replen += decode_open_maxsz;
}

static void encode_open_confirm(struct xdr_stream *xdr, const struct nfs_open_confirmargs *arg, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
	*p++ = cpu_to_be32(OP_OPEN_CONFIRM);
	p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
	*p++ = cpu_to_be32(arg->seqid->sequence->counter);
	hdr->nops++;
	hdr->replen += decode_open_confirm_maxsz;
}

static void encode_open_downgrade(struct xdr_stream *xdr, const struct nfs_closeargs *arg, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4+NFS4_STATEID_SIZE+4);
	*p++ = cpu_to_be32(OP_OPEN_DOWNGRADE);
	p = xdr_encode_opaque_fixed(p, arg->stateid->data, NFS4_STATEID_SIZE);
	*p++ = cpu_to_be32(arg->seqid->sequence->counter);
	encode_share_access(xdr, arg->fmode);
	hdr->nops++;
	hdr->replen += decode_open_downgrade_maxsz;
}

static void
encode_putfh(struct xdr_stream *xdr, const struct nfs_fh *fh, struct compound_hdr *hdr)
{
	int len = fh->size;
	__be32 *p;

	RESERVE_SPACE(8 + len);
	*p++ = cpu_to_be32(OP_PUTFH);
	*p++ = cpu_to_be32(len);
	p = xdr_encode_opaque_fixed(p, fh->data, len);
	hdr->nops++;
	hdr->replen += decode_putfh_maxsz;
}

static void encode_putrootfh(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(OP_PUTROOTFH);
	hdr->nops++;
	hdr->replen += decode_putrootfh_maxsz;
}

static void encode_stateid(struct xdr_stream *xdr, const struct nfs_open_context *ctx)
{
	nfs4_stateid stateid;
	__be32 *p;

	RESERVE_SPACE(NFS4_STATEID_SIZE);
	if (ctx->state != NULL) {
		nfs4_copy_stateid(&stateid, ctx->state, ctx->lockowner);
		p = xdr_encode_opaque_fixed(p, stateid.data, NFS4_STATEID_SIZE);
	} else
		p = xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
}

static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(OP_READ);

	encode_stateid(xdr, args->context);

	RESERVE_SPACE(12);
	p = xdr_encode_hyper(p, args->offset);
	*p++ = cpu_to_be32(args->count);
	hdr->nops++;
	hdr->replen += decode_read_maxsz;
}

static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr)
{
	uint32_t attrs[2] = {
		FATTR4_WORD0_RDATTR_ERROR|FATTR4_WORD0_FILEID,
		FATTR4_WORD1_MOUNTED_ON_FILEID,
	};
	__be32 *p;

	RESERVE_SPACE(12+NFS4_VERIFIER_SIZE+20);
	*p++ = cpu_to_be32(OP_READDIR);
	p = xdr_encode_hyper(p, readdir->cookie);
	p = xdr_encode_opaque_fixed(p, readdir->verifier.data, NFS4_VERIFIER_SIZE);
	*p++ = cpu_to_be32(readdir->count >> 1);  /* We're not doing readdirplus */
	*p++ = cpu_to_be32(readdir->count);
	*p++ = cpu_to_be32(2);
	/* Switch to mounted_on_fileid if the server supports it */
	if (readdir->bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
		attrs[0] &= ~FATTR4_WORD0_FILEID;
	else
		attrs[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
	*p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]);
	*p++ = cpu_to_be32(attrs[1] & readdir->bitmask[1]);
	hdr->nops++;
	hdr->replen += decode_readdir_maxsz;
	dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n",
			__func__,
			(unsigned long long)readdir->cookie,
			((u32 *)readdir->verifier.data)[0],
			((u32 *)readdir->verifier.data)[1],
			attrs[0] & readdir->bitmask[0],
			attrs[1] & readdir->bitmask[1]);
}

static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(OP_READLINK);
	hdr->nops++;
	hdr->replen += decode_readlink_maxsz;
}

static void encode_remove(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(8 + name->len);
	*p++ = cpu_to_be32(OP_REMOVE);
	*p++ = cpu_to_be32(name->len);
	p = xdr_encode_opaque_fixed(p, name->name, name->len);
	hdr->nops++;
	hdr->replen += decode_remove_maxsz;
}

static void encode_rename(struct xdr_stream *xdr, const struct qstr *oldname, const struct qstr *newname, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(8 + oldname->len);
	*p++ = cpu_to_be32(OP_RENAME);
	*p++ = cpu_to_be32(oldname->len);
	p = xdr_encode_opaque_fixed(p, oldname->name, oldname->len);

	RESERVE_SPACE(4 + newname->len);
	*p++ = cpu_to_be32(newname->len);
	p = xdr_encode_opaque_fixed(p, newname->name, newname->len);
	hdr->nops++;
	hdr->replen += decode_rename_maxsz;
}

static void encode_renew(struct xdr_stream *xdr, const struct nfs_client *client_stateid, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(12);
	*p++ = cpu_to_be32(OP_RENEW);
	p = xdr_encode_hyper(p, client_stateid->cl_clientid);
	hdr->nops++;
	hdr->replen += decode_renew_maxsz;
}

static void
encode_restorefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(OP_RESTOREFH);
	hdr->nops++;
	hdr->replen += decode_restorefh_maxsz;
}

static int
encode_setacl(struct xdr_stream *xdr, struct nfs_setaclargs *arg, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
	*p++ = cpu_to_be32(OP_SETATTR);
	p = xdr_encode_opaque_fixed(p, zero_stateid.data, NFS4_STATEID_SIZE);
	RESERVE_SPACE(2*4);
	*p++ = cpu_to_be32(1);
	*p++ = cpu_to_be32(FATTR4_WORD0_ACL);
	if (arg->acl_len % 4)
		return -EINVAL;
	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(arg->acl_len);
	xdr_write_pages(xdr, arg->acl_pages, arg->acl_pgbase, arg->acl_len);
	hdr->nops++;
	hdr->replen += decode_setacl_maxsz;
	return 0;
}

static void
encode_savefh(struct xdr_stream *xdr, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(OP_SAVEFH);
	hdr->nops++;
	hdr->replen += decode_savefh_maxsz;
}

static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs *arg, const struct nfs_server *server, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4+NFS4_STATEID_SIZE);
	*p++ = cpu_to_be32(OP_SETATTR);
	p = xdr_encode_opaque_fixed(p, arg->stateid.data, NFS4_STATEID_SIZE);
	hdr->nops++;
	hdr->replen += decode_setattr_maxsz;
	encode_attrs(xdr, arg->iap, server);
}

static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4 + NFS4_VERIFIER_SIZE);
	*p++ = cpu_to_be32(OP_SETCLIENTID);
	p = xdr_encode_opaque_fixed(p, setclientid->sc_verifier->data, NFS4_VERIFIER_SIZE);

	encode_string(xdr, setclientid->sc_name_len, setclientid->sc_name);
	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(setclientid->sc_prog);
	encode_string(xdr, setclientid->sc_netid_len, setclientid->sc_netid);
	encode_string(xdr, setclientid->sc_uaddr_len, setclientid->sc_uaddr);
	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(setclientid->sc_cb_ident);
	hdr->nops++;
	hdr->replen += decode_setclientid_maxsz;
}

static void encode_setclientid_confirm(struct xdr_stream *xdr, const struct nfs_client *client_state, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(12 + NFS4_VERIFIER_SIZE);
	*p++ = cpu_to_be32(OP_SETCLIENTID_CONFIRM);
	p = xdr_encode_hyper(p, client_state->cl_clientid);
	p = xdr_encode_opaque_fixed(p, client_state->cl_confirm.data, NFS4_VERIFIER_SIZE);
	hdr->nops++;
	hdr->replen += decode_setclientid_confirm_maxsz;
}

static void encode_write(struct xdr_stream *xdr, const struct nfs_writeargs *args, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4);
	*p++ = cpu_to_be32(OP_WRITE);

	encode_stateid(xdr, args->context);

	RESERVE_SPACE(16);
	p = xdr_encode_hyper(p, args->offset);
	*p++ = cpu_to_be32(args->stable);
	*p++ = cpu_to_be32(args->count);

	xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
	hdr->nops++;
	hdr->replen += decode_write_maxsz;
}

static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *stateid, struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4+NFS4_STATEID_SIZE);

	*p++ = cpu_to_be32(OP_DELEGRETURN);
	p = xdr_encode_opaque_fixed(p, stateid->data, NFS4_STATEID_SIZE);
	hdr->nops++;
	hdr->replen += decode_delegreturn_maxsz;
}

#if defined(CONFIG_NFS_V4_1)
/* NFSv4.1 operations */
static void encode_exchange_id(struct xdr_stream *xdr,
			       struct nfs41_exchange_id_args *args,
			       struct compound_hdr *hdr)
{
	__be32 *p;

	RESERVE_SPACE(4 + sizeof(args->verifier->data));
	*p++ = cpu_to_be32(OP_EXCHANGE_ID);
	p = xdr_encode_opaque_fixed(p, args->verifier->data, sizeof(args->verifier->data));

	encode_string(xdr, args->id_len, args->id);

	RESERVE_SPACE(12);
	*p++ = cpu_to_be32(args->flags);
	*p++ = cpu_to_be32(0);	/* zero length state_protect4_a */
	*p++ = cpu_to_be32(0);	/* zero length implementation id array */
	hdr->nops++;
	hdr->replen += decode_exchange_id_maxsz;
}

static void encode_create_session(struct xdr_stream *xdr,
				  struct nfs41_create_session_args *args,
				  struct compound_hdr *hdr)
{
	__be32 *p;
	char machine_name[NFS4_MAX_MACHINE_NAME_LEN];
	uint32_t len;
	struct nfs_client *clp = args->client;

	len = scnprintf(machine_name, sizeof(machine_name), "%s",
			clp->cl_ipaddr);

	RESERVE_SPACE(20 + 2*28 + 20 + len + 12);
	*p++ = cpu_to_be32(OP_CREATE_SESSION);
	p = xdr_encode_hyper(p, clp->cl_ex_clid);
	*p++ = cpu_to_be32(clp->cl_seqid);			/*Sequence id */
	*p++ = cpu_to_be32(args->flags);			/*flags */

	/* Fore Channel */
	*p++ = cpu_to_be32(args->fc_attrs.headerpadsz);	/* header padding size */
	*p++ = cpu_to_be32(args->fc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->fc_attrs.max_resp_sz);	/* max resp size */
	*p++ = cpu_to_be32(args->fc_attrs.max_resp_sz_cached);	/* Max resp sz cached */
	*p++ = cpu_to_be32(args->fc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->fc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */

	/* Back Channel */
	*p++ = cpu_to_be32(args->fc_attrs.headerpadsz);	/* header padding size */
	*p++ = cpu_to_be32(args->bc_attrs.max_rqst_sz);	/* max req size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz);	/* max resp size */
	*p++ = cpu_to_be32(args->bc_attrs.max_resp_sz_cached);	/* Max resp sz cached */
	*p++ = cpu_to_be32(args->bc_attrs.max_ops);	/* max operations */
	*p++ = cpu_to_be32(args->bc_attrs.max_reqs);	/* max requests */
	*p++ = cpu_to_be32(0);				/* rdmachannel_attrs */

	*p++ = cpu_to_be32(args->cb_program);		/* cb_program */
	*p++ = cpu_to_be32(1);
	*p++ = cpu_to_be32(RPC_AUTH_UNIX);			/* auth_sys */

	/* authsys_parms rfc1831 */
	*p++ = cpu_to_be32((u32)clp->cl_boot_time.tv_nsec);	/* stamp */
	*p++ = cpu_to_be32(len);
	p = xdr_encode_opaque_fixed(p, machine_name, len);
	*p++ = cpu_to_be32(0);				/* UID */
	*p++ = cpu_to_be32(0);				/* GID */
	*p++ = cpu_to_be32(0);				/* No more gids */
	hdr->nops++;
	hdr->replen += decode_create_session_maxsz;
}

static void encode_destroy_session(struct xdr_stream *xdr,
				   struct nfs4_session *session,
				   struct compound_hdr *hdr)
{
	__be32 *p;
	RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN);
	*p++ = cpu_to_be32(OP_DESTROY_SESSION);
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
	hdr->nops++;
	hdr->replen += decode_destroy_session_maxsz;
}
#endif /* CONFIG_NFS_V4_1 */

static void encode_sequence(struct xdr_stream *xdr,
			    const struct nfs4_sequence_args *args,
			    struct compound_hdr *hdr)
{
#if defined(CONFIG_NFS_V4_1)
	struct nfs4_session *session = args->sa_session;
	struct nfs4_slot_table *tp;
	struct nfs4_slot *slot;
	__be32 *p;

	if (!session)
		return;

	tp = &session->fc_slot_table;

	WARN_ON(args->sa_slotid == NFS4_MAX_SLOT_TABLE);
	slot = tp->slots + args->sa_slotid;

	RESERVE_SPACE(4 + NFS4_MAX_SESSIONID_LEN + 16);
	*p++ = cpu_to_be32(OP_SEQUENCE);

	/*
	 * Sessionid + seqid + slotid + max slotid + cache_this
	 */
	dprintk("%s: sessionid=%u:%u:%u:%u seqid=%d slotid=%d "
		"max_slotid=%d cache_this=%d\n",
		__func__,
		((u32 *)session->sess_id.data)[0],
		((u32 *)session->sess_id.data)[1],
		((u32 *)session->sess_id.data)[2],
		((u32 *)session->sess_id.data)[3],
		slot->seq_nr, args->sa_slotid,
		tp->highest_used_slotid, args->sa_cache_this);
	p = xdr_encode_opaque_fixed(p, session->sess_id.data, NFS4_MAX_SESSIONID_LEN);
	*p++ = cpu_to_be32(slot->seq_nr);
	*p++ = cpu_to_be32(args->sa_slotid);
	*p++ = cpu_to_be32(tp->highest_used_slotid);
	*p++ = cpu_to_be32(args->sa_cache_this);
	hdr->nops++;
	hdr->replen += decode_sequence_maxsz;
#endif /* CONFIG_NFS_V4_1 */
}

/*
 * END OF "GENERIC" ENCODE ROUTINES.
 */

static u32 nfs4_xdr_minorversion(const struct nfs4_sequence_args *args)
{
#if defined(CONFIG_NFS_V4_1)
	if (args->sa_session)
		return args->sa_session->clp->cl_minorversion;
#endif /* CONFIG_NFS_V4_1 */
	return 0;
}

/*
 * Encode an ACCESS request
 */
static int nfs4_xdr_enc_access(struct rpc_rqst *req, __be32 *p, const struct nfs4_accessargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_access(&xdr, args->access, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode LOOKUP request
 */
static int nfs4_xdr_enc_lookup(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_arg *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_lookup(&xdr, args->name, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode LOOKUP_ROOT request
 */
static int nfs4_xdr_enc_lookup_root(struct rpc_rqst *req, __be32 *p, const struct nfs4_lookup_root_arg *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putrootfh(&xdr, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode REMOVE request
 */
static int nfs4_xdr_enc_remove(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_remove(&xdr, &args->name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode RENAME request
 */
static int nfs4_xdr_enc_rename(struct rpc_rqst *req, __be32 *p, const struct nfs4_rename_arg *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->old_dir, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_putfh(&xdr, args->new_dir, &hdr);
	encode_rename(&xdr, args->old_name, args->new_name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode LINK request
 */
static int nfs4_xdr_enc_link(struct rpc_rqst *req, __be32 *p, const struct nfs4_link_arg *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_link(&xdr, args->name, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode CREATE request
 */
static int nfs4_xdr_enc_create(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->dir_fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_create(&xdr, args, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode SYMLINK request
 */
static int nfs4_xdr_enc_symlink(struct rpc_rqst *req, __be32 *p, const struct nfs4_create_arg *args)
{
	return nfs4_xdr_enc_create(req, p, args);
}

/*
 * Encode GETATTR request
 */
static int nfs4_xdr_enc_getattr(struct rpc_rqst *req, __be32 *p, const struct nfs4_getattr_arg *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode a CLOSE request
 */
static int nfs4_xdr_enc_close(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_close(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode an OPEN request
 */
static int nfs4_xdr_enc_open(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_savefh(&xdr, &hdr);
	encode_open(&xdr, args, &hdr);
	encode_getfh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_restorefh(&xdr, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode an OPEN_CONFIRM request
 */
static int nfs4_xdr_enc_open_confirm(struct rpc_rqst *req, __be32 *p, struct nfs_open_confirmargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.nops   = 0,
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_confirm(&xdr, args, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode an OPEN request with no attributes.
 */
static int nfs4_xdr_enc_open_noattr(struct rpc_rqst *req, __be32 *p, struct nfs_openargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode an OPEN_DOWNGRADE request
 */
static int nfs4_xdr_enc_open_downgrade(struct rpc_rqst *req, __be32 *p, struct nfs_closeargs *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_open_downgrade(&xdr, args, &hdr);
	encode_getfattr(&xdr, args->bitmask, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode a LOCK request
 */
static int nfs4_xdr_enc_lock(struct rpc_rqst *req, __be32 *p, struct nfs_lock_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_lock(&xdr, args, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode a LOCKT request
 */
static int nfs4_xdr_enc_lockt(struct rpc_rqst *req, __be32 *p, struct nfs_lockt_args *args)
{
	struct xdr_stream xdr;
	struct compound_hdr hdr = {
		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
	};

	xdr_init_encode(&xdr, &req->rq_snd_buf, p);
	encode_compound_hdr(&xdr, req, &hdr);
	encode_sequence(&xdr, &args->seq_args, &hdr);
	encode_putfh(&xdr, args->fh, &hdr);
	encode_lockt(&xdr, args, &hdr);
	encode_nops(&hdr);
	return 0;
}

/*
 * Encode a LOCKU request
 */
static int nfs4_xdr_enc_locku(struct rpc_rqst *req, __be32 *p, struct nfs_locku_args *args)
{