[linux-2.6-block.git] / fs / nfsd / nfsproc.c

/*
 * nfsproc2.c	Process version 2 NFS requests.
 * linux/fs/nfsd/nfs2proc.c
 * 
 * Process version 2 NFS requests.
 *
 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
 */

#include <linux/linkage.h>
#include <linux/time.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/fcntl.h>
#include <linux/net.h>
#include <linux/in.h>
#include <linux/namei.h>
#include <linux/unistd.h>
#include <linux/slab.h>

#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>

typedef struct svc_rqst	svc_rqst;
typedef struct svc_buf	svc_buf;

#define NFSDDBG_FACILITY		NFSDDBG_PROC


static __be32
nfsd_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
{
	return nfs_ok;
}

static __be32
nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
{
	if (err) return err;
	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
				    resp->fh.fh_dentry,
				    &resp->stat));
}
static __be32
nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
{
	if (err) return err;
	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
				    resp->fh.fh_dentry,
				    &resp->stat));
}
/*
 * Get a file's attributes
 * N.B. After this call resp->fh needs an fh_put
 */
static __be32
nfsd_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
					  struct nfsd_attrstat *resp)
{
	__be32 nfserr;
	dprintk("nfsd: GETATTR  %s\n", SVCFH_fmt(&argp->fh));

	fh_copy(&resp->fh, &argp->fh);
	nfserr = fh_verify(rqstp, &resp->fh, 0,
			NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
	return nfsd_return_attrs(nfserr, resp);
}

/*
 * Set a file's attributes
 * N.B. After this call resp->fh needs an fh_put
 */
static __be32
nfsd_proc_setattr(struct svc_rqst *rqstp, struct nfsd_sattrargs *argp,
					  struct nfsd_attrstat  *resp)
{
	__be32 nfserr;
	dprintk("nfsd: SETATTR  %s, valid=%x, size=%ld\n",
		SVCFH_fmt(&argp->fh),
		argp->attrs.ia_valid, (long) argp->attrs.ia_size);

	fh_copy(&resp->fh, &argp->fh);
	nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
	return nfsd_return_attrs(nfserr, resp);
}

/*
 * Look up a path name component
 * Note: the dentry in the resp->fh may be negative if the file
 * doesn't exist yet.
 * N.B. After this call resp->fh needs an fh_put
 */
static __be32
nfsd_proc_lookup(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
					 struct nfsd_diropres  *resp)
{
	__be32	nfserr;

	dprintk("nfsd: LOOKUP   %s %.*s\n",
		SVCFH_fmt(&argp->fh), argp->len, argp->name);

	fh_init(&resp->fh, NFS_FHSIZE);
	nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
				 &resp->fh);

	fh_put(&argp->fh);
	return nfsd_return_dirop(nfserr, resp);
}

/*
 * Read a symlink.
 */
static __be32
nfsd_proc_readlink(struct svc_rqst *rqstp, struct nfsd_readlinkargs *argp,
					   struct nfsd_readlinkres *resp)
{
	__be32	nfserr;

	dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));

	/* Read the symlink. */
	resp->len = NFS_MAXPATHLEN;
	nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);

	fh_put(&argp->fh);
	return nfserr;
}

/*
 * Read a portion of a file.
 * N.B. After this call resp->fh needs an fh_put
 */
static __be32
nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
				       struct nfsd_readres  *resp)
{
	__be32	nfserr;

	dprintk("nfsd: READ    %s %d bytes at %d\n",
		SVCFH_fmt(&argp->fh),
		argp->count, argp->offset);

	/* Obtain buffer pointer for payload. 19 is 1 word for
	 * status, 17 words for fattr, and 1 word for the byte count.
	 */

	if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
		char buf[RPC_MAX_ADDRBUFLEN];
		printk(KERN_NOTICE
			"oversized read request from %s (%d bytes)\n",
				svc_print_addr(rqstp, buf, sizeof(buf)),
				argp->count);
		argp->count = NFSSVC_MAXBLKSIZE_V2;
	}
	svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);

	resp->count = argp->count;
	nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
				  argp->offset,
			   	  rqstp->rq_vec, argp->vlen,
				  &resp->count);

	if (nfserr) return nfserr;
	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
				    resp->fh.fh_dentry,
				    &resp->stat));
}

/*
 * Write data to a file
 * N.B. After this call resp->fh needs an fh_put
 */
static __be32
nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
					struct nfsd_attrstat  *resp)
{
	__be32	nfserr;
	int	stable = 1;
	unsigned long cnt = argp->len;

	dprintk("nfsd: WRITE    %s %d bytes at %d\n",
		SVCFH_fmt(&argp->fh),
		argp->len, argp->offset);

	nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
				   argp->offset,
				   rqstp->rq_vec, argp->vlen,
			           &cnt,
				   &stable);
	return nfsd_return_attrs(nfserr, resp);
}

/*
 * CREATE processing is complicated. The keyword here is `overloaded.'
 * The parent directory is kept locked between the check for existence
 * and the actual create() call in compliance with VFS protocols.
 * N.B. After this call _both_ argp->fh and resp->fh need an fh_put
 */
static __be32
nfsd_proc_create(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
					 struct nfsd_diropres   *resp)
{
	svc_fh		*dirfhp = &argp->fh;
	svc_fh		*newfhp = &resp->fh;
	struct iattr	*attr = &argp->attrs;
	struct inode	*inode;
	struct dentry	*dchild;
	int		type, mode;
	__be32		nfserr;
	dev_t		rdev = 0, wanted = new_decode_dev(attr->ia_size);

	dprintk("nfsd: CREATE   %s %.*s\n",
		SVCFH_fmt(dirfhp), argp->len, argp->name);

	/* First verify the parent file handle */
	nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
	if (nfserr)
		goto done; /* must fh_put dirfhp even on error */

	/* Check for NFSD_MAY_WRITE in nfsd_create if necessary */

	nfserr = nfserr_acces;
	if (!argp->len)
		goto done;
	nfserr = nfserr_exist;
	if (isdotent(argp->name, argp->len))
		goto done;
	fh_lock_nested(dirfhp, I_MUTEX_PARENT);
	dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
	if (IS_ERR(dchild)) {
		nfserr = nfserrno(PTR_ERR(dchild));
		goto out_unlock;
	}
	fh_init(newfhp, NFS_FHSIZE);
	nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
	if (!nfserr && !dchild->d_inode)
		nfserr = nfserr_noent;
	dput(dchild);
	if (nfserr) {
		if (nfserr != nfserr_noent)
			goto out_unlock;
		/*
		 * If the new file handle wasn't verified, we can't tell
		 * whether the file exists or not. Time to bail ...
		 */
		nfserr = nfserr_acces;
		if (!newfhp->fh_dentry) {
			printk(KERN_WARNING 
				"nfsd_proc_create: file handle not verified\n");
			goto out_unlock;
		}
	}

	inode = newfhp->fh_dentry->d_inode;

	/* Unfudge the mode bits */
	if (attr->ia_valid & ATTR_MODE) {
		type = attr->ia_mode & S_IFMT;
		mode = attr->ia_mode & ~S_IFMT;
		if (!type) {
			/* no type, so if target exists, assume same as that,
			 * else assume a file */
			if (inode) {
				type = inode->i_mode & S_IFMT;
				switch(type) {
				case S_IFCHR:
				case S_IFBLK:
					/* reserve rdev for later checking */
					rdev = inode->i_rdev;
					attr->ia_valid |= ATTR_SIZE;

					/* FALLTHROUGH */
				case S_IFIFO:
					/* this is probably a permission check..
					 * at least IRIX implements perm checking on
					 *   echo thing > device-special-file-or-pipe
					 * by doing a CREATE with type==0
					 */
					nfserr = nfsd_permission(rqstp,
								 newfhp->fh_export,
								 newfhp->fh_dentry,
								 NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
					if (nfserr && nfserr != nfserr_rofs)
						goto out_unlock;
				}
			} else
				type = S_IFREG;
		}
	} else if (inode) {
		type = inode->i_mode & S_IFMT;
		mode = inode->i_mode & ~S_IFMT;
	} else {
		type = S_IFREG;
		mode = 0;	/* ??? */
	}

	attr->ia_valid |= ATTR_MODE;
	attr->ia_mode = mode;

	/* Special treatment for non-regular files according to the
	 * gospel of sun micro
	 */
	if (type != S_IFREG) {
		int	is_borc = 0;
		if (type != S_IFBLK && type != S_IFCHR) {
			rdev = 0;
		} else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
			/* If you think you've seen the worst, grok this. */
			type = S_IFIFO;
		} else {
			/* Okay, char or block special */
			is_borc = 1;
			if (!rdev)
				rdev = wanted;
		}

		/* we've used the SIZE information, so discard it */
		attr->ia_valid &= ~ATTR_SIZE;

		/* Make sure the type and device matches */
		nfserr = nfserr_exist;
		if (inode && type != (inode->i_mode & S_IFMT))
			goto out_unlock;
	}

	nfserr = 0;
	if (!inode) {
		/* File doesn't exist. Create it and set attrs */
		nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
					attr, type, rdev, newfhp);
	} else if (type == S_IFREG) {
		dprintk("nfsd:   existing %s, valid=%x, size=%ld\n",
			argp->name, attr->ia_valid, (long) attr->ia_size);
		/* File already exists. We ignore all attributes except
		 * size, so that creat() behaves exactly like
		 * open(..., O_CREAT|O_TRUNC|O_WRONLY).
		 */
		attr->ia_valid &= ATTR_SIZE;
		if (attr->ia_valid)
			nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
	}

out_unlock:
	/* We don't really need to unlock, as fh_put does it. */
	fh_unlock(dirfhp);

done:
	fh_put(dirfhp);
	return nfsd_return_dirop(nfserr, resp);
}

static __be32
nfsd_proc_remove(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
					 void		       *resp)
{
	__be32	nfserr;

	dprintk("nfsd: REMOVE   %s %.*s\n", SVCFH_fmt(&argp->fh),
		argp->len, argp->name);

	/* Unlink. -SIFDIR means file must not be a directory */
	nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
	fh_put(&argp->fh);
	return nfserr;
}

static __be32
nfsd_proc_rename(struct svc_rqst *rqstp, struct nfsd_renameargs *argp,
				  	 void		        *resp)
{
	__be32	nfserr;

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

	nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
				    &argp->tfh, argp->tname, argp->tlen);
	fh_put(&argp->ffh);
	fh_put(&argp->tfh);
	return nfserr;
}

static __be32
nfsd_proc_link(struct svc_rqst *rqstp, struct nfsd_linkargs *argp,
				void			    *resp)
{
	__be32	nfserr;

	dprintk("nfsd: LINK     %s ->\n",
		SVCFH_fmt(&argp->ffh));
	dprintk("nfsd:    %s %.*s\n",
		SVCFH_fmt(&argp->tfh),
		argp->tlen,
		argp->tname);

	nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
				  &argp->ffh);
	fh_put(&argp->ffh);
	fh_put(&argp->tfh);
	return nfserr;
}

static __be32
nfsd_proc_symlink(struct svc_rqst *rqstp, struct nfsd_symlinkargs *argp,
				          void			  *resp)
{
	struct svc_fh	newfh;
	__be32		nfserr;

	dprintk("nfsd: SYMLINK  %s %.*s -> %.*s\n",
		SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
		argp->tlen, argp->tname);

	fh_init(&newfh, NFS_FHSIZE);
	/*
	 * Create the link, look up new file and set attrs.
	 */
	nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
						 argp->tname, argp->tlen,
				 		 &newfh, &argp->attrs);


	fh_put(&argp->ffh);
	fh_put(&newfh);
	return nfserr;
}

/*
 * Make directory. This operation is not idempotent.
 * N.B. After this call resp->fh needs an fh_put
 */
static __be32
nfsd_proc_mkdir(struct svc_rqst *rqstp, struct nfsd_createargs *argp,
					struct nfsd_diropres   *resp)
{
	__be32	nfserr;

	dprintk("nfsd: MKDIR    %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);

	if (resp->fh.fh_dentry) {
		printk(KERN_WARNING
			"nfsd_proc_mkdir: response already verified??\n");
	}

	argp->attrs.ia_valid &= ~ATTR_SIZE;
	fh_init(&resp->fh, NFS_FHSIZE);
	nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
				    &argp->attrs, S_IFDIR, 0, &resp->fh);
	fh_put(&argp->fh);
	return nfsd_return_dirop(nfserr, resp);
}

/*
 * Remove a directory
 */
static __be32
nfsd_proc_rmdir(struct svc_rqst *rqstp, struct nfsd_diropargs *argp,
				 	void		      *resp)
{
	__be32	nfserr;

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

	nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
	fh_put(&argp->fh);
	return nfserr;
}

/*
 * Read a portion of a directory.
 */
static __be32
nfsd_proc_readdir(struct svc_rqst *rqstp, struct nfsd_readdirargs *argp,
					  struct nfsd_readdirres  *resp)
{
	int		count;
	__be32		nfserr;
	loff_t		offset;

	dprintk("nfsd: READDIR  %s %d bytes at %d\n",
		SVCFH_fmt(&argp->fh),		
		argp->count, argp->cookie);

	/* Shrink to the client read size */
	count = (argp->count >> 2) - 2;

	/* Make sure we've room for the NULL ptr & eof flag */
	count -= 2;
	if (count < 0)
		count = 0;

	resp->buffer = argp->buffer;
	resp->offset = NULL;
	resp->buflen = count;
	resp->common.err = nfs_ok;
	/* Read directory and encode entries on the fly */
	offset = argp->cookie;
	nfserr = nfsd_readdir(rqstp, &argp->fh, &offset, 
			      &resp->common, nfssvc_encode_entry);

	resp->count = resp->buffer - argp->buffer;
	if (resp->offset)
		*resp->offset = htonl(offset);

	fh_put(&argp->fh);
	return nfserr;
}

/*
 * Get file system info
 */
static __be32
nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle   *argp,
					  struct nfsd_statfsres *resp)
{
	__be32	nfserr;

	dprintk("nfsd: STATFS   %s\n", SVCFH_fmt(&argp->fh));

	nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
			NFSD_MAY_BYPASS_GSS_ON_ROOT);
	fh_put(&argp->fh);
	return nfserr;
}

/*
 * NFSv2 Server procedures.
 * Only the results of non-idempotent operations are cached.
 */
#define nfsd_proc_none		NULL
#define nfssvc_release_none	NULL
struct nfsd_void { int dummy; };

#define PROC(name, argt, rest, relt, cache, respsize)	\
 { (svc_procfunc) nfsd_proc_##name,		\
   (kxdrproc_t) nfssvc_decode_##argt,		\
   (kxdrproc_t) nfssvc_encode_##rest,		\
   (kxdrproc_t) nfssvc_release_##relt,		\
   sizeof(struct nfsd_##argt),			\
   sizeof(struct nfsd_##rest),			\
   0,						\
   cache,					\
   respsize,				       	\
 }

#define ST 1		/* status */
#define FH 8		/* filehandle */
#define	AT 18		/* attributes */

static struct svc_procedure		nfsd_procedures2[18] = {
  PROC(null,	 void,		void,		none,		RC_NOCACHE, ST),
  PROC(getattr,	 fhandle,	attrstat,	fhandle,	RC_NOCACHE, ST+AT),
  PROC(setattr,  sattrargs,	attrstat,	fhandle,	RC_REPLBUFF, ST+AT),
  PROC(none,	 void,		void,		none,		RC_NOCACHE, ST),
  PROC(lookup,	 diropargs,	diropres,	fhandle,	RC_NOCACHE, ST+FH+AT),
  PROC(readlink, readlinkargs,	readlinkres,	none,		RC_NOCACHE, ST+1+NFS_MAXPATHLEN/4),
  PROC(read,	 readargs,	readres,	fhandle,	RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4),
  PROC(none,	 void,		void,		none,		RC_NOCACHE, ST),
  PROC(write,	 writeargs,	attrstat,	fhandle,	RC_REPLBUFF, ST+AT),
  PROC(create,	 createargs,	diropres,	fhandle,	RC_REPLBUFF, ST+FH+AT),
  PROC(remove,	 diropargs,	void,		none,		RC_REPLSTAT, ST),
  PROC(rename,	 renameargs,	void,		none,		RC_REPLSTAT, ST),
  PROC(link,	 linkargs,	void,		none,		RC_REPLSTAT, ST),
  PROC(symlink,	 symlinkargs,	void,		none,		RC_REPLSTAT, ST),
  PROC(mkdir,	 createargs,	diropres,	fhandle,	RC_REPLBUFF, ST+FH+AT),
  PROC(rmdir,	 diropargs,	void,		none,		RC_REPLSTAT, ST),
  PROC(readdir,	 readdirargs,	readdirres,	none,		RC_NOCACHE, 0),
  PROC(statfs,	 fhandle,	statfsres,	none,		RC_NOCACHE, ST+5),
};


struct svc_version	nfsd_version2 = {
		.vs_vers	= 2,
		.vs_nproc	= 18,
		.vs_proc	= nfsd_procedures2,
		.vs_dispatch	= nfsd_dispatch,
		.vs_xdrsize	= NFS2_SVC_XDRSIZE,
};

/*
 * Map errnos to NFS errnos.
 */
__be32
nfserrno (int errno)
{
	static struct {
		__be32	nfserr;
		int	syserr;
	} nfs_errtbl[] = {
		{ nfs_ok, 0 },
		{ nfserr_perm, -EPERM },
		{ nfserr_noent, -ENOENT },
		{ nfserr_io, -EIO },
		{ nfserr_nxio, -ENXIO },
		{ nfserr_acces, -EACCES },
		{ nfserr_exist, -EEXIST },
		{ nfserr_xdev, -EXDEV },
		{ nfserr_mlink, -EMLINK },
		{ nfserr_nodev, -ENODEV },
		{ nfserr_notdir, -ENOTDIR },
		{ nfserr_isdir, -EISDIR },
		{ nfserr_inval, -EINVAL },
		{ nfserr_fbig, -EFBIG },
		{ nfserr_nospc, -ENOSPC },
		{ nfserr_rofs, -EROFS },
		{ nfserr_mlink, -EMLINK },
		{ nfserr_nametoolong, -ENAMETOOLONG },
		{ nfserr_notempty, -ENOTEMPTY },
#ifdef EDQUOT
		{ nfserr_dquot, -EDQUOT },
#endif
		{ nfserr_stale, -ESTALE },
		{ nfserr_jukebox, -ETIMEDOUT },
		{ nfserr_jukebox, -ERESTARTSYS },
		{ nfserr_dropit, -EAGAIN },
		{ nfserr_dropit, -ENOMEM },
		{ nfserr_badname, -ESRCH },
		{ nfserr_io, -ETXTBSY },
		{ nfserr_notsupp, -EOPNOTSUPP },
		{ nfserr_toosmall, -ETOOSMALL },
	};
	int	i;

	for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
		if (nfs_errtbl[i].syserr == errno)
			return nfs_errtbl[i].nfserr;
	}
	printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
	return nfserr_io;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* nfsproc2.c Process version 2 NFS requests.
	3	* linux/fs/nfsd/nfs2proc.c
	4	*
	5	* Process version 2 NFS requests.
	6	*
	7	* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
	8	*/
	9
	10	#include <linux/linkage.h>
	11	#include <linux/time.h>
	12	#include <linux/errno.h>
	13	#include <linux/fs.h>
	14	#include <linux/stat.h>
	15	#include <linux/fcntl.h>
	16	#include <linux/net.h>
	17	#include <linux/in.h>
	18	#include <linux/namei.h>
	19	#include <linux/unistd.h>
	20	#include <linux/slab.h>
	21
ad06e4bd	22	#include <linux/sunrpc/clnt.h>
1da177e4 LT	23	#include <linux/sunrpc/svc.h>
	24	#include <linux/nfsd/nfsd.h>
	25	#include <linux/nfsd/cache.h>
	26	#include <linux/nfsd/xdr.h>
	27
	28	typedef struct svc_rqst svc_rqst;
	29	typedef struct svc_buf svc_buf;
	30
	31	#define NFSDDBG_FACILITY NFSDDBG_PROC
	32
	33
7111c66e	34	static __be32
1da177e4 LT	35	nfsd_proc_null(struct svc_rqst rqstp, void argp, void *resp)
	36	{
	37	return nfs_ok;
	38	}
	39
c4d987ba AV	40	static __be32
c4d987ba AV	41	nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
846f2fcd DS	42	{
846f2fcd DS	43	if (err) return err;
54775491	44	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
846f2fcd DS	45	resp->fh.fh_dentry,
	46	&resp->stat));
	47	}
c4d987ba AV	48	static __be32
c4d987ba AV	49	nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
846f2fcd DS	50	{
846f2fcd DS	51	if (err) return err;
54775491	52	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
846f2fcd DS	53	resp->fh.fh_dentry,
	54	&resp->stat));
	55	}
1da177e4 LT	56	/*
	57	* Get a file's attributes
	58	* N.B. After this call resp->fh needs an fh_put
	59	*/
7111c66e	60	static __be32
1da177e4 LT	61	nfsd_proc_getattr(struct svc_rqst rqstp, struct nfsd_fhandle argp,
	62	struct nfsd_attrstat *resp)
	63	{
c4d987ba	64	__be32 nfserr;
1da177e4 LT	65	dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
	66
	67	fh_copy(&resp->fh, &argp->fh);
04716e66 BF	68	nfserr = fh_verify(rqstp, &resp->fh, 0,
04716e66 BF	69	NFSD_MAY_NOP \| NFSD_MAY_BYPASS_GSS_ON_ROOT);
846f2fcd	70	return nfsd_return_attrs(nfserr, resp);
1da177e4 LT	71	}
	72
	73	/*
	74	* Set a file's attributes
	75	* N.B. After this call resp->fh needs an fh_put
	76	*/
7111c66e	77	static __be32
1da177e4 LT	78	nfsd_proc_setattr(struct svc_rqst rqstp, struct nfsd_sattrargs argp,
	79	struct nfsd_attrstat *resp)
	80	{
c4d987ba	81	__be32 nfserr;
1da177e4 LT	82	dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
	83	SVCFH_fmt(&argp->fh),
	84	argp->attrs.ia_valid, (long) argp->attrs.ia_size);
	85
	86	fh_copy(&resp->fh, &argp->fh);
846f2fcd DS	87	nfserr = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,0, (time_t)0);
846f2fcd DS	88	return nfsd_return_attrs(nfserr, resp);
1da177e4 LT	89	}
	90
	91	/*
	92	* Look up a path name component
	93	* Note: the dentry in the resp->fh may be negative if the file
	94	* doesn't exist yet.
	95	* N.B. After this call resp->fh needs an fh_put
	96	*/
7111c66e	97	static __be32
1da177e4 LT	98	nfsd_proc_lookup(struct svc_rqst rqstp, struct nfsd_diropargs argp,
	99	struct nfsd_diropres *resp)
	100	{
c4d987ba	101	__be32 nfserr;
1da177e4 LT	102
	103	dprintk("nfsd: LOOKUP %s %.*s\n",
	104	SVCFH_fmt(&argp->fh), argp->len, argp->name);
	105
	106	fh_init(&resp->fh, NFS_FHSIZE);
	107	nfserr = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
	108	&resp->fh);
	109
	110	fh_put(&argp->fh);
846f2fcd	111	return nfsd_return_dirop(nfserr, resp);
1da177e4 LT	112	}
	113
	114	/*
	115	* Read a symlink.
	116	*/
7111c66e	117	static __be32
1da177e4 LT	118	nfsd_proc_readlink(struct svc_rqst rqstp, struct nfsd_readlinkargs argp,
	119	struct nfsd_readlinkres *resp)
	120	{
c4d987ba	121	__be32 nfserr;
1da177e4 LT	122
	123	dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
	124
	125	/* Read the symlink. */
	126	resp->len = NFS_MAXPATHLEN;
	127	nfserr = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
	128
	129	fh_put(&argp->fh);
	130	return nfserr;
	131	}
	132
	133	/*
	134	* Read a portion of a file.
	135	* N.B. After this call resp->fh needs an fh_put
	136	*/
7111c66e	137	static __be32
1da177e4 LT	138	nfsd_proc_read(struct svc_rqst rqstp, struct nfsd_readargs argp,
	139	struct nfsd_readres *resp)
	140	{
c4d987ba	141	__be32 nfserr;
1da177e4 LT	142
	143	dprintk("nfsd: READ %s %d bytes at %d\n",
	144	SVCFH_fmt(&argp->fh),
	145	argp->count, argp->offset);
	146
	147	/* Obtain buffer pointer for payload. 19 is 1 word for
	148	* status, 17 words for fattr, and 1 word for the byte count.
	149	*/
	150
7adae489	151	if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
ad06e4bd	152	char buf[RPC_MAX_ADDRBUFLEN];
1da177e4	153	printk(KERN_NOTICE
ad06e4bd CL	154	"oversized read request from %s (%d bytes)\n",
ad06e4bd CL	155	svc_print_addr(rqstp, buf, sizeof(buf)),
1da177e4	156	argp->count);
7adae489	157	argp->count = NFSSVC_MAXBLKSIZE_V2;
1da177e4	158	}
cd123012	159	svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
1da177e4 LT	160
	161	resp->count = argp->count;
	162	nfserr = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
	163	argp->offset,
3cc03b16	164	rqstp->rq_vec, argp->vlen,
1da177e4 LT	165	&resp->count);
1da177e4 LT	166
846f2fcd	167	if (nfserr) return nfserr;
54775491	168	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
846f2fcd DS	169	resp->fh.fh_dentry,
846f2fcd DS	170	&resp->stat));
1da177e4 LT	171	}
	172
	173	/*
	174	* Write data to a file
	175	* N.B. After this call resp->fh needs an fh_put
	176	*/
7111c66e	177	static __be32
1da177e4 LT	178	nfsd_proc_write(struct svc_rqst rqstp, struct nfsd_writeargs argp,
	179	struct nfsd_attrstat *resp)
	180	{
c4d987ba	181	__be32 nfserr;
1da177e4	182	int stable = 1;
31dec253	183	unsigned long cnt = argp->len;
1da177e4 LT	184
	185	dprintk("nfsd: WRITE %s %d bytes at %d\n",
	186	SVCFH_fmt(&argp->fh),
	187	argp->len, argp->offset);
	188
	189	nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
	190	argp->offset,
3cc03b16	191	rqstp->rq_vec, argp->vlen,
31dec253	192	&cnt,
1da177e4	193	&stable);
846f2fcd	194	return nfsd_return_attrs(nfserr, resp);
1da177e4 LT	195	}
	196
	197	/*
	198	* CREATE processing is complicated. The keyword here is `overloaded.'
	199	* The parent directory is kept locked between the check for existence
	200	* and the actual create() call in compliance with VFS protocols.
	201	* N.B. After this call _both_ argp->fh and resp->fh need an fh_put
	202	*/
7111c66e	203	static __be32
1da177e4 LT	204	nfsd_proc_create(struct svc_rqst rqstp, struct nfsd_createargs argp,
	205	struct nfsd_diropres *resp)
	206	{
	207	svc_fh *dirfhp = &argp->fh;
	208	svc_fh *newfhp = &resp->fh;
	209	struct iattr *attr = &argp->attrs;
	210	struct inode *inode;
	211	struct dentry *dchild;
c4d987ba AV	212	int type, mode;
c4d987ba AV	213	__be32 nfserr;
1da177e4 LT	214	dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
	215
	216	dprintk("nfsd: CREATE %s %.*s\n",
	217	SVCFH_fmt(dirfhp), argp->len, argp->name);
	218
	219	/* First verify the parent file handle */
8837abca	220	nfserr = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
1da177e4 LT	221	if (nfserr)
	222	goto done; /* must fh_put dirfhp even on error */
	223
8837abca	224	/* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
1da177e4 LT	225
	226	nfserr = nfserr_acces;
	227	if (!argp->len)
	228	goto done;
	229	nfserr = nfserr_exist;
	230	if (isdotent(argp->name, argp->len))
	231	goto done;
7ed94296	232	fh_lock_nested(dirfhp, I_MUTEX_PARENT);
1da177e4 LT	233	dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
	234	if (IS_ERR(dchild)) {
	235	nfserr = nfserrno(PTR_ERR(dchild));
	236	goto out_unlock;
	237	}
	238	fh_init(newfhp, NFS_FHSIZE);
	239	nfserr = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
	240	if (!nfserr && !dchild->d_inode)
	241	nfserr = nfserr_noent;
	242	dput(dchild);
	243	if (nfserr) {
	244	if (nfserr != nfserr_noent)
	245	goto out_unlock;
	246	/*
	247	* If the new file handle wasn't verified, we can't tell
	248	* whether the file exists or not. Time to bail ...
	249	*/
	250	nfserr = nfserr_acces;
	251	if (!newfhp->fh_dentry) {
	252	printk(KERN_WARNING
	253	"nfsd_proc_create: file handle not verified\n");
	254	goto out_unlock;
	255	}
	256	}
	257
	258	inode = newfhp->fh_dentry->d_inode;
	259
	260	/* Unfudge the mode bits */
	261	if (attr->ia_valid & ATTR_MODE) {
	262	type = attr->ia_mode & S_IFMT;
	263	mode = attr->ia_mode & ~S_IFMT;
	264	if (!type) {
	265	/* no type, so if target exists, assume same as that,
	266	* else assume a file */
	267	if (inode) {
	268	type = inode->i_mode & S_IFMT;
	269	switch(type) {
	270	case S_IFCHR:
	271	case S_IFBLK:
	272	/* reserve rdev for later checking */
	273	rdev = inode->i_rdev;
	274	attr->ia_valid \|= ATTR_SIZE;
	275
	276	/* FALLTHROUGH */
	277	case S_IFIFO:
	278	/* this is probably a permission check..
	279	* at least IRIX implements perm checking on
	280	* echo thing > device-special-file-or-pipe
	281	* by doing a CREATE with type==0
	282	*/
0ec757df BF	283	nfserr = nfsd_permission(rqstp,
0ec757df BF	284	newfhp->fh_export,
1da177e4	285	newfhp->fh_dentry,
8837abca	286	NFSD_MAY_WRITE\|NFSD_MAY_LOCAL_ACCESS);
1da177e4 LT	287	if (nfserr && nfserr != nfserr_rofs)
	288	goto out_unlock;
	289	}
	290	} else
	291	type = S_IFREG;
	292	}
	293	} else if (inode) {
	294	type = inode->i_mode & S_IFMT;
	295	mode = inode->i_mode & ~S_IFMT;
	296	} else {
	297	type = S_IFREG;
	298	mode = 0; /* ??? */
	299	}
	300
	301	attr->ia_valid \|= ATTR_MODE;
	302	attr->ia_mode = mode;
	303
	304	/* Special treatment for non-regular files according to the
	305	* gospel of sun micro
	306	*/
	307	if (type != S_IFREG) {
	308	int is_borc = 0;
	309	if (type != S_IFBLK && type != S_IFCHR) {
	310	rdev = 0;
	311	} else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
	312	/* If you think you've seen the worst, grok this. */
	313	type = S_IFIFO;
	314	} else {
	315	/* Okay, char or block special */
	316	is_borc = 1;
	317	if (!rdev)
	318	rdev = wanted;
	319	}
	320
	321	/* we've used the SIZE information, so discard it */
	322	attr->ia_valid &= ~ATTR_SIZE;
	323
	324	/* Make sure the type and device matches */
	325	nfserr = nfserr_exist;
	326	if (inode && type != (inode->i_mode & S_IFMT))
	327	goto out_unlock;
	328	}
	329
	330	nfserr = 0;
	331	if (!inode) {
	332	/* File doesn't exist. Create it and set attrs */
	333	nfserr = nfsd_create(rqstp, dirfhp, argp->name, argp->len,
	334	attr, type, rdev, newfhp);
	335	} else if (type == S_IFREG) {
	336	dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
	337	argp->name, attr->ia_valid, (long) attr->ia_size);
	338	/* File already exists. We ignore all attributes except
	339	* size, so that creat() behaves exactly like
	340	* open(..., O_CREAT\|O_TRUNC\|O_WRONLY).
	341	*/
	342	attr->ia_valid &= ATTR_SIZE;
	343	if (attr->ia_valid)
	344	nfserr = nfsd_setattr(rqstp, newfhp, attr, 0, (time_t)0);
	345	}
	346
	347	out_unlock:
	348	/* We don't really need to unlock, as fh_put does it. */
	349	fh_unlock(dirfhp);
	350
351	done:
352	fh_put(dirfhp);
846f2fcd	353	return nfsd_return_dirop(nfserr, resp);
1da177e4 LT	354	}
1da177e4 LT	355
7111c66e	356	static __be32
1da177e4 LT	357	nfsd_proc_remove(struct svc_rqst rqstp, struct nfsd_diropargs argp,
	358	void *resp)
	359	{
c4d987ba	360	__be32 nfserr;
1da177e4 LT	361
	362	dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
	363	argp->len, argp->name);
	364
	365	/* Unlink. -SIFDIR means file must not be a directory */
	366	nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
	367	fh_put(&argp->fh);
	368	return nfserr;
	369	}
	370
7111c66e	371	static __be32
1da177e4 LT	372	nfsd_proc_rename(struct svc_rqst rqstp, struct nfsd_renameargs argp,
	373	void *resp)
	374	{
c4d987ba	375	__be32 nfserr;
1da177e4 LT	376
	377	dprintk("nfsd: RENAME %s %.*s -> \n",
	378	SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
	379	dprintk("nfsd: -> %s %.*s\n",
	380	SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
	381
	382	nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
	383	&argp->tfh, argp->tname, argp->tlen);
	384	fh_put(&argp->ffh);
	385	fh_put(&argp->tfh);
	386	return nfserr;
	387	}
	388
7111c66e	389	static __be32
1da177e4 LT	390	nfsd_proc_link(struct svc_rqst rqstp, struct nfsd_linkargs argp,
	391	void *resp)
	392	{
c4d987ba	393	__be32 nfserr;
1da177e4 LT	394
	395	dprintk("nfsd: LINK %s ->\n",
	396	SVCFH_fmt(&argp->ffh));
	397	dprintk("nfsd: %s %.*s\n",
	398	SVCFH_fmt(&argp->tfh),
	399	argp->tlen,
	400	argp->tname);
	401
	402	nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
	403	&argp->ffh);
	404	fh_put(&argp->ffh);
	405	fh_put(&argp->tfh);
	406	return nfserr;
	407	}
	408
7111c66e	409	static __be32
1da177e4 LT	410	nfsd_proc_symlink(struct svc_rqst rqstp, struct nfsd_symlinkargs argp,
	411	void *resp)
	412	{
	413	struct svc_fh newfh;
c4d987ba	414	__be32 nfserr;
1da177e4 LT	415
	416	dprintk("nfsd: SYMLINK %s %.s -> %.s\n",
	417	SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
	418	argp->tlen, argp->tname);
	419
	420	fh_init(&newfh, NFS_FHSIZE);
	421	/*
	422	* Create the link, look up new file and set attrs.
	423	*/
	424	nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
	425	argp->tname, argp->tlen,
	426	&newfh, &argp->attrs);
	427
	428
	429	fh_put(&argp->ffh);
	430	fh_put(&newfh);
	431	return nfserr;
	432	}
	433
	434	/*
	435	* Make directory. This operation is not idempotent.
	436	* N.B. After this call resp->fh needs an fh_put
	437	*/
7111c66e	438	static __be32
1da177e4 LT	439	nfsd_proc_mkdir(struct svc_rqst rqstp, struct nfsd_createargs argp,
	440	struct nfsd_diropres *resp)
	441	{
c4d987ba	442	__be32 nfserr;
1da177e4 LT	443
	444	dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
	445
	446	if (resp->fh.fh_dentry) {
	447	printk(KERN_WARNING
	448	"nfsd_proc_mkdir: response already verified??\n");
	449	}
	450
	451	argp->attrs.ia_valid &= ~ATTR_SIZE;
	452	fh_init(&resp->fh, NFS_FHSIZE);
	453	nfserr = nfsd_create(rqstp, &argp->fh, argp->name, argp->len,
	454	&argp->attrs, S_IFDIR, 0, &resp->fh);
	455	fh_put(&argp->fh);
846f2fcd	456	return nfsd_return_dirop(nfserr, resp);
1da177e4 LT	457	}
	458
	459	/*
	460	* Remove a directory
	461	*/
7111c66e	462	static __be32
1da177e4 LT	463	nfsd_proc_rmdir(struct svc_rqst rqstp, struct nfsd_diropargs argp,
	464	void *resp)
	465	{
c4d987ba	466	__be32 nfserr;
1da177e4 LT	467
	468	dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
	469
	470	nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
	471	fh_put(&argp->fh);
	472	return nfserr;
	473	}
	474
	475	/*
	476	* Read a portion of a directory.
	477	*/
7111c66e	478	static __be32
1da177e4 LT	479	nfsd_proc_readdir(struct svc_rqst rqstp, struct nfsd_readdirargs argp,
	480	struct nfsd_readdirres *resp)
	481	{
c4d987ba AV	482	int count;
c4d987ba AV	483	__be32 nfserr;
1da177e4 LT	484	loff_t offset;
	485
	486	dprintk("nfsd: READDIR %s %d bytes at %d\n",
	487	SVCFH_fmt(&argp->fh),
	488	argp->count, argp->cookie);
	489
	490	/* Shrink to the client read size */
	491	count = (argp->count >> 2) - 2;
	492
	493	/* Make sure we've room for the NULL ptr & eof flag */
	494	count -= 2;
	495	if (count < 0)
	496	count = 0;
	497
	498	resp->buffer = argp->buffer;
	499	resp->offset = NULL;
	500	resp->buflen = count;
	501	resp->common.err = nfs_ok;
	502	/* Read directory and encode entries on the fly */
	503	offset = argp->cookie;
	504	nfserr = nfsd_readdir(rqstp, &argp->fh, &offset,
	505	&resp->common, nfssvc_encode_entry);
	506
	507	resp->count = resp->buffer - argp->buffer;
	508	if (resp->offset)
	509	*resp->offset = htonl(offset);
	510
	511	fh_put(&argp->fh);
	512	return nfserr;
	513	}
	514
	515	/*
	516	* Get file system info
	517	*/
7111c66e	518	static __be32
1da177e4 LT	519	nfsd_proc_statfs(struct svc_rqst * rqstp, struct nfsd_fhandle *argp,
	520	struct nfsd_statfsres *resp)
	521	{
c4d987ba	522	__be32 nfserr;
1da177e4 LT	523
	524	dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh));
	525
04716e66 BF	526	nfserr = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
04716e66 BF	527	NFSD_MAY_BYPASS_GSS_ON_ROOT);
1da177e4 LT	528	fh_put(&argp->fh);
	529	return nfserr;
	530	}
	531
	532	/*
	533	* NFSv2 Server procedures.
	534	* Only the results of non-idempotent operations are cached.
	535	*/
	536	#define nfsd_proc_none NULL
	537	#define nfssvc_release_none NULL
	538	struct nfsd_void { int dummy; };
	539
	540	#define PROC(name, argt, rest, relt, cache, respsize) \
	541	{ (svc_procfunc) nfsd_proc_##name, \
	542	(kxdrproc_t) nfssvc_decode_##argt, \
	543	(kxdrproc_t) nfssvc_encode_##rest, \
	544	(kxdrproc_t) nfssvc_release_##relt, \
	545	sizeof(struct nfsd_##argt), \
	546	sizeof(struct nfsd_##rest), \
	547	0, \
	548	cache, \
	549	respsize, \
	550	}
	551
	552	#define ST 1 /* status */
	553	#define FH 8 /* filehandle */
	554	#define AT 18 /* attributes */
	555
	556	static struct svc_procedure nfsd_procedures2[18] = {
	557	PROC(null, void, void, none, RC_NOCACHE, ST),
	558	PROC(getattr, fhandle, attrstat, fhandle, RC_NOCACHE, ST+AT),
	559	PROC(setattr, sattrargs, attrstat, fhandle, RC_REPLBUFF, ST+AT),
	560	PROC(none, void, void, none, RC_NOCACHE, ST),
	561	PROC(lookup, diropargs, diropres, fhandle, RC_NOCACHE, ST+FH+AT),
	562	PROC(readlink, readlinkargs, readlinkres, none, RC_NOCACHE, ST+1+NFS_MAXPATHLEN/4),
7adae489	563	PROC(read, readargs, readres, fhandle, RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4),
1da177e4 LT	564	PROC(none, void, void, none, RC_NOCACHE, ST),
	565	PROC(write, writeargs, attrstat, fhandle, RC_REPLBUFF, ST+AT),
	566	PROC(create, createargs, diropres, fhandle, RC_REPLBUFF, ST+FH+AT),
	567	PROC(remove, diropargs, void, none, RC_REPLSTAT, ST),
	568	PROC(rename, renameargs, void, none, RC_REPLSTAT, ST),
	569	PROC(link, linkargs, void, none, RC_REPLSTAT, ST),
	570	PROC(symlink, symlinkargs, void, none, RC_REPLSTAT, ST),
	571	PROC(mkdir, createargs, diropres, fhandle, RC_REPLBUFF, ST+FH+AT),
	572	PROC(rmdir, diropargs, void, none, RC_REPLSTAT, ST),
	573	PROC(readdir, readdirargs, readdirres, none, RC_NOCACHE, 0),
	574	PROC(statfs, fhandle, statfsres, none, RC_NOCACHE, ST+5),
	575	};
	576
	577
	578	struct svc_version nfsd_version2 = {
	579	.vs_vers = 2,
	580	.vs_nproc = 18,
	581	.vs_proc = nfsd_procedures2,
	582	.vs_dispatch = nfsd_dispatch,
	583	.vs_xdrsize = NFS2_SVC_XDRSIZE,
	584	};
	585
	586	/*
	587	* Map errnos to NFS errnos.
	588	*/
63f10311	589	__be32
1da177e4 LT	590	nfserrno (int errno)
	591	{
	592	static struct {
63f10311	593	__be32 nfserr;
1da177e4 LT	594	int syserr;
	595	} nfs_errtbl[] = {
	596	{ nfs_ok, 0 },
	597	{ nfserr_perm, -EPERM },
	598	{ nfserr_noent, -ENOENT },
	599	{ nfserr_io, -EIO },
	600	{ nfserr_nxio, -ENXIO },
	601	{ nfserr_acces, -EACCES },
	602	{ nfserr_exist, -EEXIST },
	603	{ nfserr_xdev, -EXDEV },
	604	{ nfserr_mlink, -EMLINK },
	605	{ nfserr_nodev, -ENODEV },
	606	{ nfserr_notdir, -ENOTDIR },
	607	{ nfserr_isdir, -EISDIR },
	608	{ nfserr_inval, -EINVAL },
	609	{ nfserr_fbig, -EFBIG },
	610	{ nfserr_nospc, -ENOSPC },
	611	{ nfserr_rofs, -EROFS },
	612	{ nfserr_mlink, -EMLINK },
	613	{ nfserr_nametoolong, -ENAMETOOLONG },
	614	{ nfserr_notempty, -ENOTEMPTY },
	615	#ifdef EDQUOT
	616	{ nfserr_dquot, -EDQUOT },
	617	#endif
	618	{ nfserr_stale, -ESTALE },
	619	{ nfserr_jukebox, -ETIMEDOUT },
599eb304	620	{ nfserr_jukebox, -ERESTARTSYS },
1da177e4 LT	621	{ nfserr_dropit, -EAGAIN },
	622	{ nfserr_dropit, -ENOMEM },
	623	{ nfserr_badname, -ESRCH },
	624	{ nfserr_io, -ETXTBSY },
a838cc49	625	{ nfserr_notsupp, -EOPNOTSUPP },
b7aeda40	626	{ nfserr_toosmall, -ETOOSMALL },
1da177e4 LT	627	};
	628	int i;
	629
63f10311	630	for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) {
1da177e4 LT	631	if (nfs_errtbl[i].syserr == errno)
	632	return nfs_errtbl[i].nfserr;
	633	}
	634	printk (KERN_INFO "nfsd: non-standard errno: %d\n", errno);
	635	return nfserr_io;
	636	}
	637