diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
new file mode 100644
index 0000000..e815874
--- /dev/null
+++ b/fs/nfsd/nfs4proc.c
@@ -0,0 +1,984 @@
+/*
+ *  fs/nfsd/nfs4proc.c
+ *
+ *  Server-side procedures for NFSv4.
+ *
+ *  Copyright (c) 2002 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Kendrick Smith <kmsmith@umich.edu>
+ *  Andy Adamson   <andros@umich.edu>
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of the University nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Note: some routines in this file are just trivial wrappers
+ * (e.g. nfsd4_lookup()) defined solely for the sake of consistent
+ * naming.  Since all such routines have been declared "inline",
+ * there shouldn't be any associated overhead.  At some point in
+ * the future, I might inline these "by hand" to clean up a
+ * little.
+ */
+
+#include <linux/param.h>
+#include <linux/major.h>
+#include <linux/slab.h>
+
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/cache.h>
+#include <linux/nfs4.h>
+#include <linux/nfsd/state.h>
+#include <linux/nfsd/xdr4.h>
+#include <linux/nfs4_acl.h>
+
+#define NFSDDBG_FACILITY		NFSDDBG_PROC
+
+static inline void
+fh_dup2(struct svc_fh *dst, struct svc_fh *src)
+{
+	fh_put(dst);
+	dget(src->fh_dentry);
+	if (src->fh_export)
+		cache_get(&src->fh_export->h);
+	*dst = *src;
+}
+
+static int
+do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+	int accmode, status;
+
+	if (open->op_truncate &&
+		!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
+		return nfserr_inval;
+
+	accmode = MAY_NOP;
+	if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
+		accmode = MAY_READ;
+	if (open->op_share_deny & NFS4_SHARE_ACCESS_WRITE)
+		accmode |= (MAY_WRITE | MAY_TRUNC);
+	accmode |= MAY_OWNER_OVERRIDE;
+
+	status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
+
+	return status;
+}
+
+static int
+do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+	struct svc_fh resfh;
+	int status;
+
+	fh_init(&resfh, NFS4_FHSIZE);
+	open->op_truncate = 0;
+
+	if (open->op_create) {
+		/*
+		 * Note: create modes (UNCHECKED,GUARDED...) are the same
+		 * in NFSv4 as in v3.
+		 */
+		status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data,
+					open->op_fname.len, &open->op_iattr,
+					&resfh, open->op_createmode,
+					(u32 *)open->op_verf.data, &open->op_truncate);
+	}
+	else {
+		status = nfsd_lookup(rqstp, current_fh,
+				     open->op_fname.data, open->op_fname.len, &resfh);
+		fh_unlock(current_fh);
+	}
+
+	if (!status) {
+		set_change_info(&open->op_cinfo, current_fh);
+
+		/* set reply cache */
+		fh_dup2(current_fh, &resfh);
+		open->op_stateowner->so_replay.rp_openfh_len =
+			resfh.fh_handle.fh_size;
+		memcpy(open->op_stateowner->so_replay.rp_openfh,
+				&resfh.fh_handle.fh_base,
+				resfh.fh_handle.fh_size);
+
+		status = do_open_permission(rqstp, current_fh, open);
+	}
+
+	fh_put(&resfh);
+	return status;
+}
+
+static int
+do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+	int status;
+
+	/* Only reclaims from previously confirmed clients are valid */
+	if ((status = nfs4_check_open_reclaim(&open->op_clientid)))
+		return status;
+
+	/* We don't know the target directory, and therefore can not
+	* set the change info
+	*/
+
+	memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
+
+	/* set replay cache */
+	open->op_stateowner->so_replay.rp_openfh_len = current_fh->fh_handle.fh_size;
+	memcpy(open->op_stateowner->so_replay.rp_openfh,
+		&current_fh->fh_handle.fh_base,
+		current_fh->fh_handle.fh_size);
+
+	open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
+		(open->op_iattr.ia_size == 0);
+
+	status = do_open_permission(rqstp, current_fh, open);
+
+	return status;
+}
+
+
+static inline int
+nfsd4_open(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open)
+{
+	int status;
+	dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n",
+		(int)open->op_fname.len, open->op_fname.data,
+		open->op_stateowner);
+
+	if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
+		return nfserr_grace;
+
+	if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
+		return nfserr_no_grace;
+
+	/* This check required by spec. */
+	if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
+		return nfserr_inval;
+
+	nfs4_lock_state();
+
+	/* check seqid for replay. set nfs4_owner */
+	status = nfsd4_process_open1(open);
+	if (status == NFSERR_REPLAY_ME) {
+		struct nfs4_replay *rp = &open->op_stateowner->so_replay;
+		fh_put(current_fh);
+		current_fh->fh_handle.fh_size = rp->rp_openfh_len;
+		memcpy(&current_fh->fh_handle.fh_base, rp->rp_openfh,
+				rp->rp_openfh_len);
+		status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
+		if (status)
+			dprintk("nfsd4_open: replay failed"
+				" restoring previous filehandle\n");
+		else
+			status = NFSERR_REPLAY_ME;
+	}
+	if (status)
+		goto out;
+	switch (open->op_claim_type) {
+		case NFS4_OPEN_CLAIM_NULL:
+			/*
+			 * (1) set CURRENT_FH to the file being opened,
+			 * creating it if necessary, (2) set open->op_cinfo,
+			 * (3) set open->op_truncate if the file is to be
+			 * truncated after opening, (4) do permission checking.
+			 */
+			status = do_open_lookup(rqstp, current_fh, open);
+			if (status)
+				goto out;
+			break;
+		case NFS4_OPEN_CLAIM_PREVIOUS:
+			/*
+			 * The CURRENT_FH is already set to the file being
+			 * opened.  (1) set open->op_cinfo, (2) set
+			 * open->op_truncate if the file is to be truncated
+			 * after opening, (3) do permission checking.
+			*/
+			status = do_open_fhandle(rqstp, current_fh, open);
+			if (status)
+				goto out;
+			break;
+		case NFS4_OPEN_CLAIM_DELEGATE_CUR:
+             	case NFS4_OPEN_CLAIM_DELEGATE_PREV:
+			printk("NFSD: unsupported OPEN claim type %d\n",
+				open->op_claim_type);
+			status = nfserr_notsupp;
+			goto out;
+		default:
+			printk("NFSD: Invalid OPEN claim type %d\n",
+				open->op_claim_type);
+			status = nfserr_inval;
+			goto out;
+	}
+	/*
+	 * nfsd4_process_open2() does the actual opening of the file.  If
+	 * successful, it (1) truncates the file if open->op_truncate was
+	 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
+	 */
+	status = nfsd4_process_open2(rqstp, current_fh, open);
+out:
+	if (open->op_stateowner)
+		nfs4_get_stateowner(open->op_stateowner);
+	nfs4_unlock_state();
+	return status;
+}
+
+/*
+ * filehandle-manipulating ops.
+ */
+static inline int
+nfsd4_getfh(struct svc_fh *current_fh, struct svc_fh **getfh)
+{
+	if (!current_fh->fh_dentry)
+		return nfserr_nofilehandle;
+
+	*getfh = current_fh;
+	return nfs_ok;
+}
+
+static inline int
+nfsd4_putfh(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_putfh *putfh)
+{
+	fh_put(current_fh);
+	current_fh->fh_handle.fh_size = putfh->pf_fhlen;
+	memcpy(&current_fh->fh_handle.fh_base, putfh->pf_fhval, putfh->pf_fhlen);
+	return fh_verify(rqstp, current_fh, 0, MAY_NOP);
+}
+
+static inline int
+nfsd4_putrootfh(struct svc_rqst *rqstp, struct svc_fh *current_fh)
+{
+	int status;
+
+	fh_put(current_fh);
+	status = exp_pseudoroot(rqstp->rq_client, current_fh,
+			      &rqstp->rq_chandle);
+	if (!status)
+		status = nfserrno(nfsd_setuser(rqstp, current_fh->fh_export));
+	return status;
+}
+
+static inline int
+nfsd4_restorefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
+{
+	if (!save_fh->fh_dentry)
+		return nfserr_restorefh;
+
+	fh_dup2(current_fh, save_fh);
+	return nfs_ok;
+}
+
+static inline int
+nfsd4_savefh(struct svc_fh *current_fh, struct svc_fh *save_fh)
+{
+	if (!current_fh->fh_dentry)
+		return nfserr_nofilehandle;
+
+	fh_dup2(save_fh, current_fh);
+	return nfs_ok;
+}
+
+/*
+ * misc nfsv4 ops
+ */
+static inline int
+nfsd4_access(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_access *access)
+{
+	if (access->ac_req_access & ~NFS3_ACCESS_FULL)
+		return nfserr_inval;
+
+	access->ac_resp_access = access->ac_req_access;
+	return nfsd_access(rqstp, current_fh, &access->ac_resp_access, &access->ac_supported);
+}
+
+static inline int
+nfsd4_commit(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_commit *commit)
+{
+	int status;
+
+	u32 *p = (u32 *)commit->co_verf.data;
+	*p++ = nfssvc_boot.tv_sec;
+	*p++ = nfssvc_boot.tv_usec;
+
+	status = nfsd_commit(rqstp, current_fh, commit->co_offset, commit->co_count);
+	if (status == nfserr_symlink)
+		status = nfserr_inval;
+	return status;
+}
+
+static int
+nfsd4_create(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_create *create)
+{
+	struct svc_fh resfh;
+	int status;
+	dev_t rdev;
+
+	fh_init(&resfh, NFS4_FHSIZE);
+
+	status = fh_verify(rqstp, current_fh, S_IFDIR, MAY_CREATE);
+	if (status == nfserr_symlink)
+		status = nfserr_notdir;
+	if (status)
+		return status;
+
+	switch (create->cr_type) {
+	case NF4LNK:
+		/* ugh! we have to null-terminate the linktext, or
+		 * vfs_symlink() will choke.  it is always safe to
+		 * null-terminate by brute force, since at worst we
+		 * will overwrite the first byte of the create namelen
+		 * in the XDR buffer, which has already been extracted
+		 * during XDR decode.
+		 */
+		create->cr_linkname[create->cr_linklen] = 0;
+
+		status = nfsd_symlink(rqstp, current_fh, create->cr_name,
+				      create->cr_namelen, create->cr_linkname,
+				      create->cr_linklen, &resfh, &create->cr_iattr);
+		break;
+
+	case NF4BLK:
+		rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
+		if (MAJOR(rdev) != create->cr_specdata1 ||
+		    MINOR(rdev) != create->cr_specdata2)
+			return nfserr_inval;
+		status = nfsd_create(rqstp, current_fh, create->cr_name,
+				     create->cr_namelen, &create->cr_iattr,
+				     S_IFBLK, rdev, &resfh);
+		break;
+
+	case NF4CHR:
+		rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
+		if (MAJOR(rdev) != create->cr_specdata1 ||
+		    MINOR(rdev) != create->cr_specdata2)
+			return nfserr_inval;
+		status = nfsd_create(rqstp, current_fh, create->cr_name,
+				     create->cr_namelen, &create->cr_iattr,
+				     S_IFCHR, rdev, &resfh);
+		break;
+
+	case NF4SOCK:
+		status = nfsd_create(rqstp, current_fh, create->cr_name,
+				     create->cr_namelen, &create->cr_iattr,
+				     S_IFSOCK, 0, &resfh);
+		break;
+
+	case NF4FIFO:
+		status = nfsd_create(rqstp, current_fh, create->cr_name,
+				     create->cr_namelen, &create->cr_iattr,
+				     S_IFIFO, 0, &resfh);
+		break;
+
+	case NF4DIR:
+		create->cr_iattr.ia_valid &= ~ATTR_SIZE;
+		status = nfsd_create(rqstp, current_fh, create->cr_name,
+				     create->cr_namelen, &create->cr_iattr,
+				     S_IFDIR, 0, &resfh);
+		break;
+
+	default:
+		status = nfserr_badtype;
+	}
+
+	if (!status) {
+		fh_unlock(current_fh);
+		set_change_info(&create->cr_cinfo, current_fh);
+		fh_dup2(current_fh, &resfh);
+	}
+
+	fh_put(&resfh);
+	return status;
+}
+
+static inline int
+nfsd4_getattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_getattr *getattr)
+{
+	int status;
+
+	status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
+	if (status)
+		return status;
+
+	if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
+		return nfserr_inval;
+
+	getattr->ga_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
+	getattr->ga_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
+
+	getattr->ga_fhp = current_fh;
+	return nfs_ok;
+}
+
+static inline int
+nfsd4_link(struct svc_rqst *rqstp, struct svc_fh *current_fh,
+	   struct svc_fh *save_fh, struct nfsd4_link *link)
+{
+	int status = nfserr_nofilehandle;
+
+	if (!save_fh->fh_dentry)
+		return status;
+	status = nfsd_link(rqstp, current_fh, link->li_name, link->li_namelen, save_fh);
+	if (!status)
+		set_change_info(&link->li_cinfo, current_fh);
+	return status;
+}
+
+static int
+nfsd4_lookupp(struct svc_rqst *rqstp, struct svc_fh *current_fh)
+{
+	struct svc_fh tmp_fh;
+	int ret;
+
+	fh_init(&tmp_fh, NFS4_FHSIZE);
+	if((ret = exp_pseudoroot(rqstp->rq_client, &tmp_fh,
+			      &rqstp->rq_chandle)) != 0)
+		return ret;
+	if (tmp_fh.fh_dentry == current_fh->fh_dentry) {
+		fh_put(&tmp_fh);
+		return nfserr_noent;
+	}
+	fh_put(&tmp_fh);
+	return nfsd_lookup(rqstp, current_fh, "..", 2, current_fh);
+}
+
+static inline int
+nfsd4_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lookup *lookup)
+{
+	return nfsd_lookup(rqstp, current_fh, lookup->lo_name, lookup->lo_len, current_fh);
+}
+
+static inline int
+nfsd4_read(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_read *read)
+{
+	int status;
+	struct file *filp = NULL;
+
+	/* no need to check permission - this will be done in nfsd_read() */
+
+	if (read->rd_offset >= OFFSET_MAX)
+		return nfserr_inval;
+
+	nfs4_lock_state();
+	/* check stateid */
+	if ((status = nfs4_preprocess_stateid_op(current_fh, &read->rd_stateid,
+					CHECK_FH | RD_STATE, &filp))) {
+		dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
+		goto out;
+	}
+	status = nfs_ok;
+out:
+	nfs4_unlock_state();
+	read->rd_rqstp = rqstp;
+	read->rd_fhp = current_fh;
+	read->rd_filp = filp;
+	return status;
+}
+
+static inline int
+nfsd4_readdir(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readdir *readdir)
+{
+	u64 cookie = readdir->rd_cookie;
+	static const nfs4_verifier zeroverf;
+
+	/* no need to check permission - this will be done in nfsd_readdir() */
+
+	if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
+		return nfserr_inval;
+
+	readdir->rd_bmval[0] &= NFSD_SUPPORTED_ATTRS_WORD0;
+	readdir->rd_bmval[1] &= NFSD_SUPPORTED_ATTRS_WORD1;
+
+	if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) ||
+	    (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
+		return nfserr_bad_cookie;
+
+	readdir->rd_rqstp = rqstp;
+	readdir->rd_fhp = current_fh;
+	return nfs_ok;
+}
+
+static inline int
+nfsd4_readlink(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_readlink *readlink)
+{
+	readlink->rl_rqstp = rqstp;
+	readlink->rl_fhp = current_fh;
+	return nfs_ok;
+}
+
+static inline int
+nfsd4_remove(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_remove *remove)
+{
+	int status;
+
+	status = nfsd_unlink(rqstp, current_fh, 0, remove->rm_name, remove->rm_namelen);
+	if (status == nfserr_symlink)
+		return nfserr_notdir;
+	if (!status) {
+		fh_unlock(current_fh);
+		set_change_info(&remove->rm_cinfo, current_fh);
+	}
+	return status;
+}
+
+static inline int
+nfsd4_rename(struct svc_rqst *rqstp, struct svc_fh *current_fh,
+	     struct svc_fh *save_fh, struct nfsd4_rename *rename)
+{
+	int status = nfserr_nofilehandle;
+
+	if (!save_fh->fh_dentry)
+		return status;
+	status = nfsd_rename(rqstp, save_fh, rename->rn_sname,
+			     rename->rn_snamelen, current_fh,
+			     rename->rn_tname, rename->rn_tnamelen);
+
+	/* the underlying filesystem returns different error's than required
+	 * by NFSv4. both save_fh and current_fh have been verified.. */
+	if (status == nfserr_isdir)
+		status = nfserr_exist;
+	else if ((status == nfserr_notdir) &&
+                  (S_ISDIR(save_fh->fh_dentry->d_inode->i_mode) &&
+                   S_ISDIR(current_fh->fh_dentry->d_inode->i_mode)))
+		status = nfserr_exist;
+	else if (status == nfserr_symlink)
+		status = nfserr_notdir;
+
+	if (!status) {
+		set_change_info(&rename->rn_sinfo, current_fh);
+		set_change_info(&rename->rn_tinfo, save_fh);
+	}
+	return status;
+}
+
+static inline int
+nfsd4_setattr(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_setattr *setattr)
+{
+	int status = nfs_ok;
+
+	if (!current_fh->fh_dentry)
+		return nfserr_nofilehandle;
+
+	status = nfs_ok;
+	if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
+		nfs4_lock_state();
+		if ((status = nfs4_preprocess_stateid_op(current_fh,
+						&setattr->sa_stateid,
+						CHECK_FH | WR_STATE, NULL))) {
+			dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
+			goto out_unlock;
+		}
+		nfs4_unlock_state();
+	}
+	status = nfs_ok;
+	if (setattr->sa_acl != NULL)
+		status = nfsd4_set_nfs4_acl(rqstp, current_fh, setattr->sa_acl);
+	if (status)
+		goto out;
+	status = nfsd_setattr(rqstp, current_fh, &setattr->sa_iattr,
+				0, (time_t)0);
+out:
+	return status;
+out_unlock:
+	nfs4_unlock_state();
+	return status;
+}
+
+static inline int
+nfsd4_write(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_write *write)
+{
+	stateid_t *stateid = &write->wr_stateid;
+	struct file *filp = NULL;
+	u32 *p;
+	int status = nfs_ok;
+
+	/* no need to check permission - this will be done in nfsd_write() */
+
+	if (write->wr_offset >= OFFSET_MAX)
+		return nfserr_inval;
+
+	nfs4_lock_state();
+	if ((status = nfs4_preprocess_stateid_op(current_fh, stateid,
+					CHECK_FH | WR_STATE, &filp))) {
+		dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
+		goto out;
+	}
+	nfs4_unlock_state();
+
+	write->wr_bytes_written = write->wr_buflen;
+	write->wr_how_written = write->wr_stable_how;
+	p = (u32 *)write->wr_verifier.data;
+	*p++ = nfssvc_boot.tv_sec;
+	*p++ = nfssvc_boot.tv_usec;
+
+	status =  nfsd_write(rqstp, current_fh, filp, write->wr_offset,
+			write->wr_vec, write->wr_vlen, write->wr_buflen,
+			&write->wr_how_written);
+
+	if (status == nfserr_symlink)
+		status = nfserr_inval;
+	return status;
+out:
+	nfs4_unlock_state();
+	return status;
+}
+
+/* This routine never returns NFS_OK!  If there are no other errors, it
+ * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
+ * attributes matched.  VERIFY is implemented by mapping NFSERR_SAME
+ * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
+ */
+static int
+nfsd4_verify(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_verify *verify)
+{
+	u32 *buf, *p;
+	int count;
+	int status;
+
+	status = fh_verify(rqstp, current_fh, 0, MAY_NOP);
+	if (status)
+		return status;
+
+	if ((verify->ve_bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0)
+	    || (verify->ve_bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
+		return nfserr_attrnotsupp;
+	if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
+	    || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
+		return nfserr_inval;
+	if (verify->ve_attrlen & 3)
+		return nfserr_inval;
+
+	/* count in words:
+	 *   bitmap_len(1) + bitmap(2) + attr_len(1) = 4
+	 */
+	count = 4 + (verify->ve_attrlen >> 2);
+	buf = kmalloc(count << 2, GFP_KERNEL);
+	if (!buf)
+		return nfserr_resource;
+
+	status = nfsd4_encode_fattr(current_fh, current_fh->fh_export,
+				    current_fh->fh_dentry, buf,
+				    &count, verify->ve_bmval,
+				    rqstp);
+
+	/* this means that nfsd4_encode_fattr() ran out of space */
+	if (status == nfserr_resource && count == 0)
+		status = nfserr_not_same;
+	if (status)
+		goto out_kfree;
+
+	p = buf + 3;
+	status = nfserr_not_same;
+	if (ntohl(*p++) != verify->ve_attrlen)
+		goto out_kfree;
+	if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
+		status = nfserr_same;
+
+out_kfree:
+	kfree(buf);
+	return status;
+}
+
+/*
+ * NULL call.
+ */
+static int
+nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
+{
+	return nfs_ok;
+}
+
+
+/*
+ * COMPOUND call.
+ */
+static int
+nfsd4_proc_compound(struct svc_rqst *rqstp,
+		    struct nfsd4_compoundargs *args,
+		    struct nfsd4_compoundres *resp)
+{
+	struct nfsd4_op	*op;
+	struct svc_fh	*current_fh = NULL;
+	struct svc_fh	*save_fh = NULL;
+	struct nfs4_stateowner *replay_owner = NULL;
+	int		slack_space;    /* in words, not bytes! */
+	int		status;
+
+	status = nfserr_resource;
+	current_fh = kmalloc(sizeof(*current_fh), GFP_KERNEL);
+	if (current_fh == NULL)
+		goto out;
+	fh_init(current_fh, NFS4_FHSIZE);
+	save_fh = kmalloc(sizeof(*save_fh), GFP_KERNEL);
+	if (save_fh == NULL)
+		goto out;
+	fh_init(save_fh, NFS4_FHSIZE);
+
+	resp->xbuf = &rqstp->rq_res;
+	resp->p = rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len;
+	resp->tagp = resp->p;
+	/* reserve space for: taglen, tag, and opcnt */
+	resp->p += 2 + XDR_QUADLEN(args->taglen);
+	resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE;
+	resp->taglen = args->taglen;
+	resp->tag = args->tag;
+	resp->opcnt = 0;
+	resp->rqstp = rqstp;
+
+	/*
+	 * According to RFC3010, this takes precedence over all other errors.
+	 */
+	status = nfserr_minor_vers_mismatch;
+	if (args->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
+		goto out;
+
+	status = nfs_ok;
+	while (!status && resp->opcnt < args->opcnt) {
+		op = &args->ops[resp->opcnt++];
+
+		/*
+		 * The XDR decode routines may have pre-set op->status;
+		 * for example, if there is a miscellaneous XDR error
+		 * it will be set to nfserr_bad_xdr.
+		 */
+		if (op->status)
+			goto encode_op;
+
+		/* We must be able to encode a successful response to
+		 * this operation, with enough room left over to encode a
+		 * failed response to the next operation.  If we don't
+		 * have enough room, fail with ERR_RESOURCE.
+		 */
+/* FIXME - is slack_space *really* words, or bytes??? - neilb */
+		slack_space = (char *)resp->end - (char *)resp->p;
+		if (slack_space < COMPOUND_SLACK_SPACE + COMPOUND_ERR_SLACK_SPACE) {
+			BUG_ON(slack_space < COMPOUND_ERR_SLACK_SPACE);
+			op->status = nfserr_resource;
+			goto encode_op;
+		}
+
+		/* All operations except RENEW, SETCLIENTID, RESTOREFH
+		* SETCLIENTID_CONFIRM, PUTFH and PUTROOTFH
+		* require a valid current filehandle
+		*
+		* SETATTR NOFILEHANDLE error handled in nfsd4_setattr
+		* due to required returned bitmap argument
+		*/
+		if ((!current_fh->fh_dentry) &&
+		   !((op->opnum == OP_PUTFH) || (op->opnum == OP_PUTROOTFH) ||
+		   (op->opnum == OP_SETCLIENTID) ||
+		   (op->opnum == OP_SETCLIENTID_CONFIRM) ||
+		   (op->opnum == OP_RENEW) || (op->opnum == OP_RESTOREFH) ||
+		   (op->opnum == OP_RELEASE_LOCKOWNER) ||
+		   (op->opnum == OP_SETATTR))) {
+			op->status = nfserr_nofilehandle;
+			goto encode_op;
+		}
+		switch (op->opnum) {
+		case OP_ACCESS:
+			op->status = nfsd4_access(rqstp, current_fh, &op->u.access);
+			break;
+		case OP_CLOSE:
+			op->status = nfsd4_close(rqstp, current_fh, &op->u.close);
+			replay_owner = op->u.close.cl_stateowner;
+			break;
+		case OP_COMMIT:
+			op->status = nfsd4_commit(rqstp, current_fh, &op->u.commit);
+			break;
+		case OP_CREATE:
+			op->status = nfsd4_create(rqstp, current_fh, &op->u.create);
+			break;
+		case OP_DELEGRETURN:
+			op->status = nfsd4_delegreturn(rqstp, current_fh, &op->u.delegreturn);
+			break;
+		case OP_GETATTR:
+			op->status = nfsd4_getattr(rqstp, current_fh, &op->u.getattr);
+			break;
+		case OP_GETFH:
+			op->status = nfsd4_getfh(current_fh, &op->u.getfh);
+			break;
+		case OP_LINK:
+			op->status = nfsd4_link(rqstp, current_fh, save_fh, &op->u.link);
+			break;
+		case OP_LOCK:
+			op->status = nfsd4_lock(rqstp, current_fh, &op->u.lock);
+			replay_owner = op->u.lock.lk_stateowner;
+			break;
+		case OP_LOCKT:
+			op->status = nfsd4_lockt(rqstp, current_fh, &op->u.lockt);
+			break;
+		case OP_LOCKU:
+			op->status = nfsd4_locku(rqstp, current_fh, &op->u.locku);
+			replay_owner = op->u.locku.lu_stateowner;
+			break;
+		case OP_LOOKUP:
+			op->status = nfsd4_lookup(rqstp, current_fh, &op->u.lookup);
+			break;
+		case OP_LOOKUPP:
+			op->status = nfsd4_lookupp(rqstp, current_fh);
+			break;
+		case OP_NVERIFY:
+			op->status = nfsd4_verify(rqstp, current_fh, &op->u.nverify);
+			if (op->status == nfserr_not_same)
+				op->status = nfs_ok;
+			break;
+		case OP_OPEN:
+			op->status = nfsd4_open(rqstp, current_fh, &op->u.open);
+			replay_owner = op->u.open.op_stateowner;
+			break;
+		case OP_OPEN_CONFIRM:
+			op->status = nfsd4_open_confirm(rqstp, current_fh, &op->u.open_confirm);
+			replay_owner = op->u.open_confirm.oc_stateowner;
+			break;
+		case OP_OPEN_DOWNGRADE:
+			op->status = nfsd4_open_downgrade(rqstp, current_fh, &op->u.open_downgrade);
+			replay_owner = op->u.open_downgrade.od_stateowner;
+			break;
+		case OP_PUTFH:
+			op->status = nfsd4_putfh(rqstp, current_fh, &op->u.putfh);
+			break;
+		case OP_PUTROOTFH:
+			op->status = nfsd4_putrootfh(rqstp, current_fh);
+			break;
+		case OP_READ:
+			op->status = nfsd4_read(rqstp, current_fh, &op->u.read);
+			break;
+		case OP_READDIR:
+			op->status = nfsd4_readdir(rqstp, current_fh, &op->u.readdir);
+			break;
+		case OP_READLINK:
+			op->status = nfsd4_readlink(rqstp, current_fh, &op->u.readlink);
+			break;
+		case OP_REMOVE:
+			op->status = nfsd4_remove(rqstp, current_fh, &op->u.remove);
+			break;
+		case OP_RENAME:
+			op->status = nfsd4_rename(rqstp, current_fh, save_fh, &op->u.rename);
+			break;
+		case OP_RENEW:
+			op->status = nfsd4_renew(&op->u.renew);
+			break;
+		case OP_RESTOREFH:
+			op->status = nfsd4_restorefh(current_fh, save_fh);
+			break;
+		case OP_SAVEFH:
+			op->status = nfsd4_savefh(current_fh, save_fh);
+			break;
+		case OP_SETATTR:
+			op->status = nfsd4_setattr(rqstp, current_fh, &op->u.setattr);
+			break;
+		case OP_SETCLIENTID:
+			op->status = nfsd4_setclientid(rqstp, &op->u.setclientid);
+			break;
+		case OP_SETCLIENTID_CONFIRM:
+			op->status = nfsd4_setclientid_confirm(rqstp, &op->u.setclientid_confirm);
+			break;
+		case OP_VERIFY:
+			op->status = nfsd4_verify(rqstp, current_fh, &op->u.verify);
+			if (op->status == nfserr_same)
+				op->status = nfs_ok;
+			break;
+		case OP_WRITE:
+			op->status = nfsd4_write(rqstp, current_fh, &op->u.write);
+			break;
+		case OP_RELEASE_LOCKOWNER:
+			op->status = nfsd4_release_lockowner(rqstp, &op->u.release_lockowner);
+			break;
+		default:
+			BUG_ON(op->status == nfs_ok);
+			break;
+		}
+
+encode_op:
+		if (op->status == NFSERR_REPLAY_ME) {
+			op->replay = &replay_owner->so_replay;
+			nfsd4_encode_replay(resp, op);
+			status = op->status = op->replay->rp_status;
+		} else {
+			nfsd4_encode_operation(resp, op);
+			status = op->status;
+		}
+		if (replay_owner && (replay_owner != (void *)(-1))) {
+			nfs4_put_stateowner(replay_owner);
+			replay_owner = NULL;
+		}
+	}
+
+out:
+	nfsd4_release_compoundargs(args);
+	if (current_fh)
+		fh_put(current_fh);
+	kfree(current_fh);
+	if (save_fh)
+		fh_put(save_fh);
+	kfree(save_fh);
+	return status;
+}
+
+#define nfs4svc_decode_voidargs		NULL
+#define nfs4svc_release_void		NULL
+#define nfsd4_voidres			nfsd4_voidargs
+#define nfs4svc_release_compound	NULL
+struct nfsd4_voidargs { int dummy; };
+
+#define PROC(name, argt, rest, relt, cache, respsize)	\
+ { (svc_procfunc) nfsd4_proc_##name,		\
+   (kxdrproc_t) nfs4svc_decode_##argt##args,	\
+   (kxdrproc_t) nfs4svc_encode_##rest##res,	\
+   (kxdrproc_t) nfs4svc_release_##relt,		\
+   sizeof(struct nfsd4_##argt##args),		\
+   sizeof(struct nfsd4_##rest##res),		\
+   0,						\
+   cache,					\
+   respsize,					\
+ }
+
+/*
+ * TODO: At the present time, the NFSv4 server does not do XID caching
+ * of requests.  Implementing XID caching would not be a serious problem,
+ * although it would require a mild change in interfaces since one
+ * doesn't know whether an NFSv4 request is idempotent until after the
+ * XDR decode.  However, XID caching totally confuses pynfs (Peter
+ * Astrand's regression testsuite for NFSv4 servers), which reuses
+ * XID's liberally, so I've left it unimplemented until pynfs generates
+ * better XID's.
+ */
+static struct svc_procedure		nfsd_procedures4[2] = {
+  PROC(null,	 void,		void,		void,	  RC_NOCACHE, 1),
+  PROC(compound, compound,	compound,	compound, RC_NOCACHE, NFSD_BUFSIZE)
+};
+
+struct svc_version	nfsd_version4 = {
+		.vs_vers	= 4,
+		.vs_nproc	= 2,
+		.vs_proc	= nfsd_procedures4,
+		.vs_dispatch	= nfsd_dispatch,
+		.vs_xdrsize	= NFS4_SVC_XDRSIZE,
+};
+
+/*
+ * Local variables:
+ *  c-basic-offset: 8
+ * End:
+ */