// SPDX-License-Identifier: GPL-2.0

  /*

   * Process version 3 NFS requests.
   *
   * Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
   */

  #include <linux/fs.h>
  #include <linux/ext2_fs.h>

  #include <linux/magic.h>

  #include "cache.h"
  #include "xdr3.h"

  #include "vfs.h"

  
  #define NFSDDBG_FACILITY		NFSDDBG_PROC

  static int	nfs3_ftypes[] = {
  	0,			/* NF3NON */
  	S_IFREG,		/* NF3REG */
  	S_IFDIR,		/* NF3DIR */
  	S_IFBLK,		/* NF3BLK */
  	S_IFCHR,		/* NF3CHR */
  	S_IFLNK,		/* NF3LNK */
  	S_IFSOCK,		/* NF3SOCK */
  	S_IFIFO,		/* NF3FIFO */
  };
  
  /*
   * NULL call.
   */

  static __be32

  nfsd3_proc_null(struct svc_rqst *rqstp)

  {

  	return rpc_success;

  }
  
  /*
   * Get a file's attributes
   */

  static __be32

  nfsd3_proc_getattr(struct svc_rqst *rqstp)

  {

  	struct nfsd_fhandle *argp = rqstp->rq_argp;
  	struct nfsd3_attrstat *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: GETATTR(3)  %s
  ",

  		SVCFH_fmt(&argp->fh));

  
  	fh_copy(&resp->fh, &argp->fh);

  	resp->status = fh_verify(rqstp, &resp->fh, 0,
  				 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
  	if (resp->status != nfs_ok)
  		goto out;
  
  	resp->status = fh_getattr(&resp->fh, &resp->stat);
  out:

  	return rpc_success;

  }
  
  /*
   * Set a file's attributes
   */

  static __be32

  nfsd3_proc_setattr(struct svc_rqst *rqstp)

  {

  	struct nfsd3_sattrargs *argp = rqstp->rq_argp;
  	struct nfsd3_attrstat *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: SETATTR(3)  %s
  ",
  				SVCFH_fmt(&argp->fh));
  
  	fh_copy(&resp->fh, &argp->fh);

  	resp->status = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
  				    argp->check_guard, argp->guardtime);

  	return rpc_success;

  }
  
  /*
   * Look up a path name component
   */

  static __be32

  nfsd3_proc_lookup(struct svc_rqst *rqstp)

  {

  	struct nfsd3_diropargs *argp = rqstp->rq_argp;
  	struct nfsd3_diropres  *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: LOOKUP(3)   %s %.*s
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->len,
  				argp->name);
  
  	fh_copy(&resp->dirfh, &argp->fh);
  	fh_init(&resp->fh, NFS3_FHSIZE);

  	resp->status = nfsd_lookup(rqstp, &resp->dirfh,
  				   argp->name, argp->len,
  				   &resp->fh);

  	return rpc_success;

  }
  
  /*
   * Check file access
   */

  static __be32

  nfsd3_proc_access(struct svc_rqst *rqstp)

  {

  	struct nfsd3_accessargs *argp = rqstp->rq_argp;
  	struct nfsd3_accessres *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: ACCESS(3)   %s 0x%x
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->access);
  
  	fh_copy(&resp->fh, &argp->fh);
  	resp->access = argp->access;

  	resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);

  	return rpc_success;

  }
  
  /*
   * Read a symlink.
   */

  static __be32

  nfsd3_proc_readlink(struct svc_rqst *rqstp)

  {

  	struct nfsd3_readlinkargs *argp = rqstp->rq_argp;
  	struct nfsd3_readlinkres *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: READLINK(3) %s
  ", SVCFH_fmt(&argp->fh));
  
  	/* Read the symlink. */
  	fh_copy(&resp->fh, &argp->fh);
  	resp->len = NFS3_MAXPATHLEN;

  	resp->status = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);

  	return rpc_success;

  }
  
  /*
   * Read a portion of a file.
   */

  static __be32

  nfsd3_proc_read(struct svc_rqst *rqstp)

  {

  	struct nfsd3_readargs *argp = rqstp->rq_argp;
  	struct nfsd3_readres *resp = rqstp->rq_resp;

  	u32	max_blocksize = svc_max_payload(rqstp);

  	unsigned long cnt = min(argp->count, max_blocksize);

  	dprintk("nfsd: READ(3) %s %lu bytes at %Lu
  ",

  				SVCFH_fmt(&argp->fh),
  				(unsigned long) argp->count,

  				(unsigned long long) argp->offset);

  
  	/* Obtain buffer pointer for payload.
  	 * 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
  	 * + 1 (xdr opaque byte count) = 26
  	 */

  	resp->count = cnt;

  	svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);

  
  	fh_copy(&resp->fh, &argp->fh);

  	resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
  				 rqstp->rq_vec, argp->vlen, &resp->count,
  				 &resp->eof);

  	return rpc_success;

  }
  
  /*
   * Write data to a file
   */

  static __be32

  nfsd3_proc_write(struct svc_rqst *rqstp)

  {

  	struct nfsd3_writeargs *argp = rqstp->rq_argp;
  	struct nfsd3_writeres *resp = rqstp->rq_resp;

  	unsigned long cnt = argp->len;

  	unsigned int nvecs;

  	dprintk("nfsd: WRITE(3)    %s %d bytes at %Lu%s
  ",

  				SVCFH_fmt(&argp->fh),
  				argp->len,

  				(unsigned long long) argp->offset,

  				argp->stable? " stable" : "");
  
  	fh_copy(&resp->fh, &argp->fh);
  	resp->committed = argp->stable;

  	nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages,
  				      &argp->first, cnt);

  	if (!nvecs) {
  		resp->status = nfserr_io;
  		goto out;
  	}
  	resp->status = nfsd_write(rqstp, &resp->fh, argp->offset,
  				  rqstp->rq_vec, nvecs, &cnt,
  				  resp->committed, resp->verf);

  	resp->count = cnt;

  out:

  	return rpc_success;

  }
  
  /*
   * With NFSv3, CREATE processing is a lot easier than with NFSv2.
   * At least in theory; we'll see how it fares in practice when the
   * first reports about SunOS compatibility problems start to pour in...
   */

  static __be32

  nfsd3_proc_create(struct svc_rqst *rqstp)

  {

  	struct nfsd3_createargs *argp = rqstp->rq_argp;
  	struct nfsd3_diropres *resp = rqstp->rq_resp;

  	svc_fh		*dirfhp, *newfhp = NULL;
  	struct iattr	*attr;

  
  	dprintk("nfsd: CREATE(3)   %s %.*s
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->len,
  				argp->name);
  
  	dirfhp = fh_copy(&resp->dirfh, &argp->fh);
  	newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
  	attr   = &argp->attrs;

  	/* Unfudge the mode bits */
  	attr->ia_mode &= ~S_IFMT;
  	if (!(attr->ia_valid & ATTR_MODE)) { 
  		attr->ia_valid |= ATTR_MODE;
  		attr->ia_mode = S_IFREG;
  	} else {
  		attr->ia_mode = (attr->ia_mode & ~S_IFMT) | S_IFREG;
  	}
  
  	/* Now create the file and set attributes */

  	resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
  				      attr, newfhp, argp->createmode,
  				      (u32 *)argp->verf, NULL, NULL);

  	return rpc_success;

  }
  
  /*
   * Make directory. This operation is not idempotent.
   */

  static __be32

  nfsd3_proc_mkdir(struct svc_rqst *rqstp)

  {

  	struct nfsd3_createargs *argp = rqstp->rq_argp;
  	struct nfsd3_diropres *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: MKDIR(3)    %s %.*s
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->len,
  				argp->name);
  
  	argp->attrs.ia_valid &= ~ATTR_SIZE;
  	fh_copy(&resp->dirfh, &argp->fh);
  	fh_init(&resp->fh, NFS3_FHSIZE);

  	resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
  				   &argp->attrs, S_IFDIR, 0, &resp->fh);

  	fh_unlock(&resp->dirfh);

  	return rpc_success;

  }

  static __be32

  nfsd3_proc_symlink(struct svc_rqst *rqstp)

  {

  	struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
  	struct nfsd3_diropres *resp = rqstp->rq_resp;

  	if (argp->tlen == 0) {
  		resp->status = nfserr_inval;
  		goto out;
  	}
  	if (argp->tlen > NFS3_MAXPATHLEN) {
  		resp->status = nfserr_nametoolong;
  		goto out;
  	}

  
  	argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,

  						page_address(rqstp->rq_arg.pages[0]),

  						argp->tlen);

  	if (IS_ERR(argp->tname)) {
  		resp->status = nfserrno(PTR_ERR(argp->tname));
  		goto out;
  	}

  	dprintk("nfsd: SYMLINK(3)  %s %.*s -> %.*s
  ",
  				SVCFH_fmt(&argp->ffh),
  				argp->flen, argp->fname,
  				argp->tlen, argp->tname);
  
  	fh_copy(&resp->dirfh, &argp->ffh);
  	fh_init(&resp->fh, NFS3_FHSIZE);

  	resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname,
  				    argp->flen, argp->tname, &resp->fh);

  	kfree(argp->tname);

  out:

  	return rpc_success;

  }
  
  /*
   * Make socket/fifo/device.
   */

  static __be32

  nfsd3_proc_mknod(struct svc_rqst *rqstp)

  {

  	struct nfsd3_mknodargs *argp = rqstp->rq_argp;
  	struct nfsd3_diropres  *resp = rqstp->rq_resp;

  	int type;

  	dev_t	rdev = 0;
  
  	dprintk("nfsd: MKNOD(3)    %s %.*s
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->len,
  				argp->name);
  
  	fh_copy(&resp->dirfh, &argp->fh);
  	fh_init(&resp->fh, NFS3_FHSIZE);

  	if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
  		rdev = MKDEV(argp->major, argp->minor);
  		if (MAJOR(rdev) != argp->major ||

  		    MINOR(rdev) != argp->minor) {
  			resp->status = nfserr_inval;
  			goto out;
  		}
  	} else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) {

  		resp->status = nfserr_badtype;

  		goto out;
  	}

  
  	type = nfs3_ftypes[argp->ftype];

  	resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
  				   &argp->attrs, type, rdev, &resp->fh);

  	fh_unlock(&resp->dirfh);

  out:

  	return rpc_success;

  }
  
  /*
   * Remove file/fifo/socket etc.
   */

  static __be32

  nfsd3_proc_remove(struct svc_rqst *rqstp)

  {

  	struct nfsd3_diropargs *argp = rqstp->rq_argp;
  	struct nfsd3_attrstat *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: REMOVE(3)   %s %.*s
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->len,
  				argp->name);
  
  	/* Unlink. -S_IFDIR means file must not be a directory */
  	fh_copy(&resp->fh, &argp->fh);

  	resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
  				   argp->name, argp->len);

  	fh_unlock(&resp->fh);

  	return rpc_success;

  }
  
  /*
   * Remove a directory
   */

  static __be32

  nfsd3_proc_rmdir(struct svc_rqst *rqstp)

  {

  	struct nfsd3_diropargs *argp = rqstp->rq_argp;
  	struct nfsd3_attrstat *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: RMDIR(3)    %s %.*s
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->len,
  				argp->name);
  
  	fh_copy(&resp->fh, &argp->fh);

  	resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
  				   argp->name, argp->len);

  	fh_unlock(&resp->fh);

  	return rpc_success;

  }

  static __be32

  nfsd3_proc_rename(struct svc_rqst *rqstp)

  {

  	struct nfsd3_renameargs *argp = rqstp->rq_argp;
  	struct nfsd3_renameres *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: RENAME(3)   %s %.*s ->
  ",
  				SVCFH_fmt(&argp->ffh),
  				argp->flen,
  				argp->fname);
  	dprintk("nfsd: -> %s %.*s
  ",
  				SVCFH_fmt(&argp->tfh),
  				argp->tlen,
  				argp->tname);
  
  	fh_copy(&resp->ffh, &argp->ffh);
  	fh_copy(&resp->tfh, &argp->tfh);

  	resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
  				   &resp->tfh, argp->tname, argp->tlen);

  	return rpc_success;

  }

  static __be32

  nfsd3_proc_link(struct svc_rqst *rqstp)

  {

  	struct nfsd3_linkargs *argp = rqstp->rq_argp;
  	struct nfsd3_linkres  *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: LINK(3)     %s ->
  ",
  				SVCFH_fmt(&argp->ffh));
  	dprintk("nfsd:   -> %s %.*s
  ",
  				SVCFH_fmt(&argp->tfh),
  				argp->tlen,
  				argp->tname);
  
  	fh_copy(&resp->fh,  &argp->ffh);
  	fh_copy(&resp->tfh, &argp->tfh);

  	resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
  				 &resp->fh);

  	return rpc_success;

  }
  
  /*
   * Read a portion of a directory.
   */

  static __be32

  nfsd3_proc_readdir(struct svc_rqst *rqstp)

  {

  	struct nfsd3_readdirargs *argp = rqstp->rq_argp;
  	struct nfsd3_readdirres  *resp = rqstp->rq_resp;

  	int		count = 0;
  	struct page	**p;
  	caddr_t		page_addr = NULL;

  
  	dprintk("nfsd: READDIR(3)  %s %d bytes at %d
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->count, (u32) argp->cookie);
  
  	/* Make sure we've room for the NULL ptr & eof flag, and shrink to
  	 * client read size */
  	count = (argp->count >> 2) - 2;
  
  	/* Read directory and encode entries on the fly */
  	fh_copy(&resp->fh, &argp->fh);
  
  	resp->buflen = count;
  	resp->common.err = nfs_ok;
  	resp->buffer = argp->buffer;
  	resp->rqstp = rqstp;

  	resp->status = nfsd_readdir(rqstp, &resp->fh, (loff_t *)&argp->cookie,
  				    &resp->common, nfs3svc_encode_entry);

  	memcpy(resp->verf, argp->verf, 8);

  	count = 0;
  	for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
  		page_addr = page_address(*p);
  
  		if (((caddr_t)resp->buffer >= page_addr) &&
  		    ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
  			count += (caddr_t)resp->buffer - page_addr;
  			break;
  		}
  		count += PAGE_SIZE;
  	}
  	resp->count = count >> 2;

  	if (resp->offset) {
  		loff_t offset = argp->cookie;
  
  		if (unlikely(resp->offset1)) {
  			/* we ended up with offset on a page boundary */
  			*resp->offset = htonl(offset >> 32);
  			*resp->offset1 = htonl(offset & 0xffffffff);
  			resp->offset1 = NULL;
  		} else {
  			xdr_encode_hyper(resp->offset, offset);
  		}
  		resp->offset = NULL;
  	}

  	return rpc_success;

  }
  
  /*
   * Read a portion of a directory, including file handles and attrs.
   * For now, we choose to ignore the dircount parameter.
   */

  static __be32

  nfsd3_proc_readdirplus(struct svc_rqst *rqstp)

  {

  	struct nfsd3_readdirargs *argp = rqstp->rq_argp;
  	struct nfsd3_readdirres  *resp = rqstp->rq_resp;

  	int	count = 0;

  	loff_t	offset;

  	struct page **p;

  	caddr_t	page_addr = NULL;
  
  	dprintk("nfsd: READDIR+(3) %s %d bytes at %d
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->count, (u32) argp->cookie);
  
  	/* Convert byte count to number of words (i.e. >> 2),
  	 * and reserve room for the NULL ptr & eof flag (-2 words) */
  	resp->count = (argp->count >> 2) - 2;
  
  	/* Read directory and encode entries on the fly */
  	fh_copy(&resp->fh, &argp->fh);
  
  	resp->common.err = nfs_ok;
  	resp->buffer = argp->buffer;
  	resp->buflen = resp->count;
  	resp->rqstp = rqstp;
  	offset = argp->cookie;

  	resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
  	if (resp->status != nfs_ok)
  		goto out;

  	if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) {
  		resp->status = nfserr_notsupp;
  		goto out;
  	}

  	resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
  				    &resp->common, nfs3svc_encode_entry_plus);

  	memcpy(resp->verf, argp->verf, 8);

  	for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
  		page_addr = page_address(*p);

  
  		if (((caddr_t)resp->buffer >= page_addr) &&
  		    ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
  			count += (caddr_t)resp->buffer - page_addr;
  			break;
  		}
  		count += PAGE_SIZE;
  	}
  	resp->count = count >> 2;
  	if (resp->offset) {
  		if (unlikely(resp->offset1)) {
  			/* we ended up with offset on a page boundary */
  			*resp->offset = htonl(offset >> 32);
  			*resp->offset1 = htonl(offset & 0xffffffff);
  			resp->offset1 = NULL;
  		} else {
  			xdr_encode_hyper(resp->offset, offset);
  		}

  		resp->offset = NULL;

  	}

  out:

  	return rpc_success;

  }
  
  /*
   * Get file system stats
   */

  static __be32

  nfsd3_proc_fsstat(struct svc_rqst *rqstp)

  {

  	struct nfsd_fhandle *argp = rqstp->rq_argp;
  	struct nfsd3_fsstatres *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: FSSTAT(3)   %s
  ",
  				SVCFH_fmt(&argp->fh));

  	resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);

  	fh_put(&argp->fh);

  	return rpc_success;

  }
  
  /*
   * Get file system info
   */

  static __be32

  nfsd3_proc_fsinfo(struct svc_rqst *rqstp)

  {

  	struct nfsd_fhandle *argp = rqstp->rq_argp;
  	struct nfsd3_fsinfores *resp = rqstp->rq_resp;

  	u32	max_blocksize = svc_max_payload(rqstp);

  
  	dprintk("nfsd: FSINFO(3)   %s
  ",
  				SVCFH_fmt(&argp->fh));

  	resp->f_rtmax  = max_blocksize;
  	resp->f_rtpref = max_blocksize;

  	resp->f_rtmult = PAGE_SIZE;

  	resp->f_wtmax  = max_blocksize;
  	resp->f_wtpref = max_blocksize;

  	resp->f_wtmult = PAGE_SIZE;

  	resp->f_dtpref = max_blocksize;

  	resp->f_maxfilesize = ~(u32) 0;
  	resp->f_properties = NFS3_FSF_DEFAULT;

  	resp->status = fh_verify(rqstp, &argp->fh, 0,
  				 NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);

  
  	/* Check special features of the file system. May request
  	 * different read/write sizes for file systems known to have
  	 * problems with large blocks */

  	if (resp->status == nfs_ok) {

  		struct super_block *sb = argp->fh.fh_dentry->d_sb;

  
  		/* Note that we don't care for remote fs's here */

  		if (sb->s_magic == MSDOS_SUPER_MAGIC) {

  			resp->f_properties = NFS3_FSF_BILLYBOY;
  		}
  		resp->f_maxfilesize = sb->s_maxbytes;
  	}
  
  	fh_put(&argp->fh);

  	return rpc_success;

  }
  
  /*
   * Get pathconf info for the specified file
   */

  static __be32

  nfsd3_proc_pathconf(struct svc_rqst *rqstp)

  {

  	struct nfsd_fhandle *argp = rqstp->rq_argp;
  	struct nfsd3_pathconfres *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: PATHCONF(3) %s
  ",
  				SVCFH_fmt(&argp->fh));
  
  	/* Set default pathconf */
  	resp->p_link_max = 255;		/* at least */
  	resp->p_name_max = 255;		/* at least */
  	resp->p_no_trunc = 0;
  	resp->p_chown_restricted = 1;
  	resp->p_case_insensitive = 0;
  	resp->p_case_preserving = 1;

  	resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);

  	if (resp->status == nfs_ok) {

  		struct super_block *sb = argp->fh.fh_dentry->d_sb;

  
  		/* Note that we don't care for remote fs's here */
  		switch (sb->s_magic) {
  		case EXT2_SUPER_MAGIC:
  			resp->p_link_max = EXT2_LINK_MAX;
  			resp->p_name_max = EXT2_NAME_LEN;
  			break;

  		case MSDOS_SUPER_MAGIC:

  			resp->p_case_insensitive = 1;
  			resp->p_case_preserving  = 0;
  			break;
  		}
  	}
  
  	fh_put(&argp->fh);

  	return rpc_success;

  }

  /*
   * Commit a file (range) to stable storage.
   */

  static __be32

  nfsd3_proc_commit(struct svc_rqst *rqstp)

  {

  	struct nfsd3_commitargs *argp = rqstp->rq_argp;
  	struct nfsd3_commitres *resp = rqstp->rq_resp;

  
  	dprintk("nfsd: COMMIT(3)   %s %u@%Lu
  ",
  				SVCFH_fmt(&argp->fh),
  				argp->count,
  				(unsigned long long) argp->offset);

  	if (argp->offset > NFS_OFFSET_MAX) {
  		resp->status = nfserr_inval;
  		goto out;
  	}

  
  	fh_copy(&resp->fh, &argp->fh);

  	resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
  				   argp->count, resp->verf);
  out:

  	return rpc_success;

  }
  
  
  /*
   * NFSv3 Server procedures.
   * Only the results of non-idempotent operations are cached.
   */

  #define nfs3svc_decode_fhandleargs	nfs3svc_decode_fhandle
  #define nfs3svc_encode_attrstatres	nfs3svc_encode_attrstat
  #define nfs3svc_encode_wccstatres	nfs3svc_encode_wccstat
  #define nfsd3_mkdirargs			nfsd3_createargs
  #define nfsd3_readdirplusargs		nfsd3_readdirargs
  #define nfsd3_fhandleargs		nfsd_fhandle
  #define nfsd3_fhandleres		nfsd3_attrstat
  #define nfsd3_attrstatres		nfsd3_attrstat
  #define nfsd3_wccstatres		nfsd3_attrstat
  #define nfsd3_createres			nfsd3_diropres
  #define nfsd3_voidres			nfsd3_voidargs
  struct nfsd3_voidargs { int dummy; };

  #define ST 1		/* status*/
  #define FH 17		/* filehandle with length */
  #define AT 21		/* attributes */
  #define pAT (1+AT)	/* post attributes - conditional */
  #define WC (7+pAT)	/* WCC attributes */

  static const struct svc_procedure nfsd_procedures3[22] = {

  	[NFS3PROC_NULL] = {

  		.pc_func = nfsd3_proc_null,

  		.pc_decode = nfs3svc_decode_voidarg,

  		.pc_encode = nfs3svc_encode_voidres,

  		.pc_argsize = sizeof(struct nfsd3_voidargs),
  		.pc_ressize = sizeof(struct nfsd3_voidres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST,
  	},
  	[NFS3PROC_GETATTR] = {

  		.pc_func = nfsd3_proc_getattr,

  		.pc_decode = nfs3svc_decode_fhandleargs,

  		.pc_encode = nfs3svc_encode_attrstatres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
  		.pc_ressize = sizeof(struct nfsd3_attrstatres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+AT,
  	},
  	[NFS3PROC_SETATTR] = {

  		.pc_func = nfsd3_proc_setattr,

  		.pc_decode = nfs3svc_decode_sattrargs,

  		.pc_encode = nfs3svc_encode_wccstatres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_sattrargs),
  		.pc_ressize = sizeof(struct nfsd3_wccstatres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+WC,
  	},
  	[NFS3PROC_LOOKUP] = {

  		.pc_func = nfsd3_proc_lookup,

  		.pc_decode = nfs3svc_decode_diropargs,

  		.pc_encode = nfs3svc_encode_diropres,

  		.pc_release = nfs3svc_release_fhandle2,

  		.pc_argsize = sizeof(struct nfsd3_diropargs),
  		.pc_ressize = sizeof(struct nfsd3_diropres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+FH+pAT+pAT,
  	},
  	[NFS3PROC_ACCESS] = {

  		.pc_func = nfsd3_proc_access,

  		.pc_decode = nfs3svc_decode_accessargs,

  		.pc_encode = nfs3svc_encode_accessres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_accessargs),
  		.pc_ressize = sizeof(struct nfsd3_accessres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+pAT+1,
  	},
  	[NFS3PROC_READLINK] = {

  		.pc_func = nfsd3_proc_readlink,

  		.pc_decode = nfs3svc_decode_readlinkargs,

  		.pc_encode = nfs3svc_encode_readlinkres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_readlinkargs),
  		.pc_ressize = sizeof(struct nfsd3_readlinkres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
  	},
  	[NFS3PROC_READ] = {

  		.pc_func = nfsd3_proc_read,

  		.pc_decode = nfs3svc_decode_readargs,

  		.pc_encode = nfs3svc_encode_readres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_readargs),
  		.pc_ressize = sizeof(struct nfsd3_readres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
  	},
  	[NFS3PROC_WRITE] = {

  		.pc_func = nfsd3_proc_write,

  		.pc_decode = nfs3svc_decode_writeargs,

  		.pc_encode = nfs3svc_encode_writeres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_writeargs),
  		.pc_ressize = sizeof(struct nfsd3_writeres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+WC+4,
  	},
  	[NFS3PROC_CREATE] = {

  		.pc_func = nfsd3_proc_create,

  		.pc_decode = nfs3svc_decode_createargs,

  		.pc_encode = nfs3svc_encode_createres,

  		.pc_release = nfs3svc_release_fhandle2,

  		.pc_argsize = sizeof(struct nfsd3_createargs),
  		.pc_ressize = sizeof(struct nfsd3_createres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+(1+FH+pAT)+WC,
  	},
  	[NFS3PROC_MKDIR] = {

  		.pc_func = nfsd3_proc_mkdir,

  		.pc_decode = nfs3svc_decode_mkdirargs,

  		.pc_encode = nfs3svc_encode_createres,

  		.pc_release = nfs3svc_release_fhandle2,

  		.pc_argsize = sizeof(struct nfsd3_mkdirargs),
  		.pc_ressize = sizeof(struct nfsd3_createres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+(1+FH+pAT)+WC,
  	},
  	[NFS3PROC_SYMLINK] = {

  		.pc_func = nfsd3_proc_symlink,

  		.pc_decode = nfs3svc_decode_symlinkargs,

  		.pc_encode = nfs3svc_encode_createres,

  		.pc_release = nfs3svc_release_fhandle2,

  		.pc_argsize = sizeof(struct nfsd3_symlinkargs),
  		.pc_ressize = sizeof(struct nfsd3_createres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+(1+FH+pAT)+WC,
  	},
  	[NFS3PROC_MKNOD] = {

  		.pc_func = nfsd3_proc_mknod,

  		.pc_decode = nfs3svc_decode_mknodargs,

  		.pc_encode = nfs3svc_encode_createres,

  		.pc_release = nfs3svc_release_fhandle2,

  		.pc_argsize = sizeof(struct nfsd3_mknodargs),
  		.pc_ressize = sizeof(struct nfsd3_createres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+(1+FH+pAT)+WC,
  	},
  	[NFS3PROC_REMOVE] = {

  		.pc_func = nfsd3_proc_remove,

  		.pc_decode = nfs3svc_decode_diropargs,

  		.pc_encode = nfs3svc_encode_wccstatres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_diropargs),
  		.pc_ressize = sizeof(struct nfsd3_wccstatres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+WC,
  	},
  	[NFS3PROC_RMDIR] = {

  		.pc_func = nfsd3_proc_rmdir,

  		.pc_decode = nfs3svc_decode_diropargs,

  		.pc_encode = nfs3svc_encode_wccstatres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_diropargs),
  		.pc_ressize = sizeof(struct nfsd3_wccstatres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+WC,
  	},
  	[NFS3PROC_RENAME] = {

  		.pc_func = nfsd3_proc_rename,

  		.pc_decode = nfs3svc_decode_renameargs,

  		.pc_encode = nfs3svc_encode_renameres,

  		.pc_release = nfs3svc_release_fhandle2,

  		.pc_argsize = sizeof(struct nfsd3_renameargs),
  		.pc_ressize = sizeof(struct nfsd3_renameres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+WC+WC,
  	},
  	[NFS3PROC_LINK] = {

  		.pc_func = nfsd3_proc_link,

  		.pc_decode = nfs3svc_decode_linkargs,

  		.pc_encode = nfs3svc_encode_linkres,

  		.pc_release = nfs3svc_release_fhandle2,

  		.pc_argsize = sizeof(struct nfsd3_linkargs),
  		.pc_ressize = sizeof(struct nfsd3_linkres),
  		.pc_cachetype = RC_REPLBUFF,
  		.pc_xdrressize = ST+pAT+WC,
  	},
  	[NFS3PROC_READDIR] = {

  		.pc_func = nfsd3_proc_readdir,

  		.pc_decode = nfs3svc_decode_readdirargs,

  		.pc_encode = nfs3svc_encode_readdirres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_readdirargs),
  		.pc_ressize = sizeof(struct nfsd3_readdirres),
  		.pc_cachetype = RC_NOCACHE,
  	},
  	[NFS3PROC_READDIRPLUS] = {

  		.pc_func = nfsd3_proc_readdirplus,

  		.pc_decode = nfs3svc_decode_readdirplusargs,

  		.pc_encode = nfs3svc_encode_readdirres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_readdirplusargs),
  		.pc_ressize = sizeof(struct nfsd3_readdirres),
  		.pc_cachetype = RC_NOCACHE,
  	},
  	[NFS3PROC_FSSTAT] = {

  		.pc_func = nfsd3_proc_fsstat,

  		.pc_decode = nfs3svc_decode_fhandleargs,

  		.pc_encode = nfs3svc_encode_fsstatres,

  		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
  		.pc_ressize = sizeof(struct nfsd3_fsstatres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+pAT+2*6+1,
  	},
  	[NFS3PROC_FSINFO] = {

  		.pc_func = nfsd3_proc_fsinfo,

  		.pc_decode = nfs3svc_decode_fhandleargs,

  		.pc_encode = nfs3svc_encode_fsinfores,

  		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
  		.pc_ressize = sizeof(struct nfsd3_fsinfores),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+pAT+12,
  	},
  	[NFS3PROC_PATHCONF] = {

  		.pc_func = nfsd3_proc_pathconf,

  		.pc_decode = nfs3svc_decode_fhandleargs,

  		.pc_encode = nfs3svc_encode_pathconfres,

  		.pc_argsize = sizeof(struct nfsd3_fhandleargs),
  		.pc_ressize = sizeof(struct nfsd3_pathconfres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+pAT+6,
  	},
  	[NFS3PROC_COMMIT] = {

  		.pc_func = nfsd3_proc_commit,

  		.pc_decode = nfs3svc_decode_commitargs,

  		.pc_encode = nfs3svc_encode_commitres,

  		.pc_release = nfs3svc_release_fhandle,

  		.pc_argsize = sizeof(struct nfsd3_commitargs),
  		.pc_ressize = sizeof(struct nfsd3_commitres),
  		.pc_cachetype = RC_NOCACHE,
  		.pc_xdrressize = ST+WC+2,
  	},

  };

  static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];

  const struct svc_version nfsd_version3 = {
  	.vs_vers	= 3,
  	.vs_nproc	= 22,
  	.vs_proc	= nfsd_procedures3,
  	.vs_dispatch	= nfsd_dispatch,
  	.vs_count	= nfsd_count3,
  	.vs_xdrsize	= NFS3_SVC_XDRSIZE,

  };