1 files changed, 711 insertions, 0 deletions

diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
new file mode 100644
index 000000000000..d91b69044a4d
--- /dev/null
+++ b/fs/nfs/nfs2xdr.c
@@ -0,0 +1,711 @@
+/*
+ * linux/fs/nfs/nfs2xdr.c
+ *
+ * XDR functions to encode/decode NFS RPC arguments and results.
+ *
+ * Copyright (C) 1992, 1993, 1994  Rick Sladkey
+ * Copyright (C) 1996 Olaf Kirch
+ * 04 Aug 1998  Ion Badulescu <ionut@cs.columbia.edu>
+ *              FIFO's need special handling in NFSv2
+ */
+
+#include <linux/param.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/slab.h>
+#include <linux/utsname.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/in.h>
+#include <linux/pagemap.h>
+#include <linux/proc_fs.h>
+#include <linux/sunrpc/clnt.h>
+#include <linux/nfs.h>
+#include <linux/nfs2.h>
+#include <linux/nfs_fs.h>
+
+#define NFSDBG_FACILITY         NFSDBG_XDR
+/* #define NFS_PARANOIA 1 */
+
+extern int                      nfs_stat_to_errno(int stat);
+
+/* Mapping from NFS error code to "errno" error code. */
+#define errno_NFSERR_IO         EIO
+
+/*
+ * Declare the space requirements for NFS arguments and replies as
+ * number of 32bit-words
+ */
+#define NFS_fhandle_sz          (8)
+#define NFS_sattr_sz            (8)
+#define NFS_filename_sz         (1+(NFS2_MAXNAMLEN>>2))
+#define NFS_path_sz             (1+(NFS2_MAXPATHLEN>>2))
+#define NFS_fattr_sz            (17)
+#define NFS_info_sz             (5)
+#define NFS_entry_sz            (NFS_filename_sz+3)
+
+#define NFS_diropargs_sz        (NFS_fhandle_sz+NFS_filename_sz)
+#define NFS_sattrargs_sz        (NFS_fhandle_sz+NFS_sattr_sz)
+#define NFS_readlinkargs_sz     (NFS_fhandle_sz)
+#define NFS_readargs_sz         (NFS_fhandle_sz+3)
+#define NFS_writeargs_sz        (NFS_fhandle_sz+4)
+#define NFS_createargs_sz       (NFS_diropargs_sz+NFS_sattr_sz)
+#define NFS_renameargs_sz       (NFS_diropargs_sz+NFS_diropargs_sz)
+#define NFS_linkargs_sz         (NFS_fhandle_sz+NFS_diropargs_sz)
+#define NFS_symlinkargs_sz      (NFS_diropargs_sz+NFS_path_sz+NFS_sattr_sz)
+#define NFS_readdirargs_sz      (NFS_fhandle_sz+2)
+
+#define NFS_attrstat_sz         (1+NFS_fattr_sz)
+#define NFS_diropres_sz         (1+NFS_fhandle_sz+NFS_fattr_sz)
+#define NFS_readlinkres_sz      (2)
+#define NFS_readres_sz          (1+NFS_fattr_sz+1)
+#define NFS_writeres_sz         (NFS_attrstat_sz)
+#define NFS_stat_sz             (1)
+#define NFS_readdirres_sz       (1)
+#define NFS_statfsres_sz        (1+NFS_info_sz)
+
+/*
+ * Common NFS XDR functions as inlines
+ */
+static inline u32 *
+xdr_encode_fhandle(u32 *p, struct nfs_fh *fhandle)
+{
+        memcpy(p, fhandle->data, NFS2_FHSIZE);
+        return p + XDR_QUADLEN(NFS2_FHSIZE);
+}
+
+static inline u32 *
+xdr_decode_fhandle(u32 *p, struct nfs_fh *fhandle)
+{
+        /* NFSv2 handles have a fixed length */
+        fhandle->size = NFS2_FHSIZE;
+        memcpy(fhandle->data, p, NFS2_FHSIZE);
+        return p + XDR_QUADLEN(NFS2_FHSIZE);
+}
+
+static inline u32*
+xdr_encode_time(u32 *p, struct timespec *timep)
+{
+        *p++ = htonl(timep->tv_sec);
+        /* Convert nanoseconds into microseconds */
+        *p++ = htonl(timep->tv_nsec ? timep->tv_nsec / 1000 : 0);
+        return p;
+}
+
+static inline u32*
+xdr_encode_current_server_time(u32 *p, struct timespec *timep)
+{
+        /*
+         * Passing the invalid value useconds=1000000 is a
+         * Sun convention for "set to current server time".
+         * It's needed to make permissions checks for the
+         * "touch" program across v2 mounts to Solaris and
+         * Irix boxes work correctly. See description of
+         * sattr in section 6.1 of "NFS Illustrated" by
+         * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
+         */
+        *p++ = htonl(timep->tv_sec);
+        *p++ = htonl(1000000);
+        return p;
+}
+
+static inline u32*
+xdr_decode_time(u32 *p, struct timespec *timep)
+{
+        timep->tv_sec = ntohl(*p++);
+        /* Convert microseconds into nanoseconds */
+        timep->tv_nsec = ntohl(*p++) * 1000;
+        return p;
+}
+
+static u32 *
+xdr_decode_fattr(u32 *p, struct nfs_fattr *fattr)
+{
+        u32 rdev;
+        fattr->type = (enum nfs_ftype) ntohl(*p++);
+        fattr->mode = ntohl(*p++);
+        fattr->nlink = ntohl(*p++);
+        fattr->uid = ntohl(*p++);
+        fattr->gid = ntohl(*p++);
+        fattr->size = ntohl(*p++);
+        fattr->du.nfs2.blocksize = ntohl(*p++);
+        rdev = ntohl(*p++);
+        fattr->du.nfs2.blocks = ntohl(*p++);
+        fattr->fsid_u.nfs3 = ntohl(*p++);
+        fattr->fileid = ntohl(*p++);
+        p = xdr_decode_time(p, &fattr->atime);
+        p = xdr_decode_time(p, &fattr->mtime);
+        p = xdr_decode_time(p, &fattr->ctime);
+        fattr->valid |= NFS_ATTR_FATTR;
+        fattr->rdev = new_decode_dev(rdev);
+        if (fattr->type == NFCHR && rdev == NFS2_FIFO_DEV) {
+                fattr->type = NFFIFO;
+                fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO;
+                fattr->rdev = 0;
+        }
+        fattr->timestamp = jiffies;
+        return p;
+}
+
+#define SATTR(p, attr, flag, field) \
+        *p++ = (attr->ia_valid & flag) ? htonl(attr->field) : ~(u32) 0
+static inline u32 *
+xdr_encode_sattr(u32 *p, struct iattr *attr)
+{
+        SATTR(p, attr, ATTR_MODE, ia_mode);
+        SATTR(p, attr, ATTR_UID, ia_uid);
+        SATTR(p, attr, ATTR_GID, ia_gid);
+        SATTR(p, attr, ATTR_SIZE, ia_size);
+
+        if (attr->ia_valid & ATTR_ATIME_SET) {
+                p = xdr_encode_time(p, &attr->ia_atime);
+        } else if (attr->ia_valid & ATTR_ATIME) {
+                p = xdr_encode_current_server_time(p, &attr->ia_atime);
+        } else {
+                *p++ = ~(u32) 0;
+                *p++ = ~(u32) 0;
+        }
+
+        if (attr->ia_valid & ATTR_MTIME_SET) {
+                p = xdr_encode_time(p, &attr->ia_mtime);
+        } else if (attr->ia_valid & ATTR_MTIME) {
+                p = xdr_encode_current_server_time(p, &attr->ia_mtime);
+        } else {
+                *p++ = ~(u32) 0;        
+                *p++ = ~(u32) 0;
+        }
+        return p;
+}
+#undef SATTR
+
+/*
+ * NFS encode functions
+ */
+/*
+ * Encode file handle argument
+ * GETATTR, READLINK, STATFS
+ */
+static int
+nfs_xdr_fhandle(struct rpc_rqst *req, u32 *p, struct nfs_fh *fh)
+{
+        p = xdr_encode_fhandle(p, fh);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+        return 0;
+}
+
+/*
+ * Encode SETATTR arguments
+ */
+static int
+nfs_xdr_sattrargs(struct rpc_rqst *req, u32 *p, struct nfs_sattrargs *args)
+{
+        p = xdr_encode_fhandle(p, args->fh);
+        p = xdr_encode_sattr(p, args->sattr);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+        return 0;
+}
+
+/*
+ * Encode directory ops argument
+ * LOOKUP, REMOVE, RMDIR
+ */
+static int
+nfs_xdr_diropargs(struct rpc_rqst *req, u32 *p, struct nfs_diropargs *args)
+{
+        p = xdr_encode_fhandle(p, args->fh);
+        p = xdr_encode_array(p, args->name, args->len);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+        return 0;
+}
+
+/*
+ * Arguments to a READ call. Since we read data directly into the page
+ * cache, we also set up the reply iovec here so that iov[1] points
+ * exactly to the page we want to fetch.
+ */
+static int
+nfs_xdr_readargs(struct rpc_rqst *req, u32 *p, struct nfs_readargs *args)
+{
+        struct rpc_auth *auth = req->rq_task->tk_auth;
+        unsigned int replen;
+        u32 offset = (u32)args->offset;
+        u32 count = args->count;
+
+        p = xdr_encode_fhandle(p, args->fh);
+        *p++ = htonl(offset);
+        *p++ = htonl(count);
+        *p++ = htonl(count);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+
+        /* Inline the page array */
+        replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2;
+        xdr_inline_pages(&req->rq_rcv_buf, replen,
+                         args->pages, args->pgbase, count);
+        return 0;
+}
+
+/*
+ * Decode READ reply
+ */
+static int
+nfs_xdr_readres(struct rpc_rqst *req, u32 *p, struct nfs_readres *res)
+{
+        struct kvec *iov = req->rq_rcv_buf.head;
+        int     status, count, recvd, hdrlen;
+
+        if ((status = ntohl(*p++)))
+                return -nfs_stat_to_errno(status);
+        p = xdr_decode_fattr(p, res->fattr);
+
+        count = ntohl(*p++);
+        res->eof = 0;
+        hdrlen = (u8 *) p - (u8 *) iov->iov_base;
+        if (iov->iov_len < hdrlen) {
+                printk(KERN_WARNING "NFS: READ reply header overflowed:"
+                                "length %d > %Zu\n", hdrlen, iov->iov_len);
+                return -errno_NFSERR_IO;
+        } else if (iov->iov_len != hdrlen) {
+                dprintk("NFS: READ header is short. iovec will be shifted.\n");
+                xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen);
+        }
+
+        recvd = req->rq_rcv_buf.len - hdrlen;
+        if (count > recvd) {
+                printk(KERN_WARNING "NFS: server cheating in read reply: "
+                        "count %d > recvd %d\n", count, recvd);
+                count = recvd;
+        }
+
+        dprintk("RPC:      readres OK count %d\n", count);
+        if (count < res->count)
+                res->count = count;
+
+        return count;
+}
+
+
+/*
+ * Write arguments. Splice the buffer to be written into the iovec.
+ */
+static int
+nfs_xdr_writeargs(struct rpc_rqst *req, u32 *p, struct nfs_writeargs *args)
+{
+        struct xdr_buf *sndbuf = &req->rq_snd_buf;
+        u32 offset = (u32)args->offset;
+        u32 count = args->count;
+
+        p = xdr_encode_fhandle(p, args->fh);
+        *p++ = htonl(offset);
+        *p++ = htonl(offset);
+        *p++ = htonl(count);
+        *p++ = htonl(count);
+        sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
+
+        /* Copy the page array */
+        xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
+        return 0;
+}
+
+/*
+ * Encode create arguments
+ * CREATE, MKDIR
+ */
+static int
+nfs_xdr_createargs(struct rpc_rqst *req, u32 *p, struct nfs_createargs *args)
+{
+        p = xdr_encode_fhandle(p, args->fh);
+        p = xdr_encode_array(p, args->name, args->len);
+        p = xdr_encode_sattr(p, args->sattr);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+        return 0;
+}
+
+/*
+ * Encode RENAME arguments
+ */
+static int
+nfs_xdr_renameargs(struct rpc_rqst *req, u32 *p, struct nfs_renameargs *args)
+{
+        p = xdr_encode_fhandle(p, args->fromfh);
+        p = xdr_encode_array(p, args->fromname, args->fromlen);
+        p = xdr_encode_fhandle(p, args->tofh);
+        p = xdr_encode_array(p, args->toname, args->tolen);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+        return 0;
+}
+
+/*
+ * Encode LINK arguments
+ */
+static int
+nfs_xdr_linkargs(struct rpc_rqst *req, u32 *p, struct nfs_linkargs *args)
+{
+        p = xdr_encode_fhandle(p, args->fromfh);
+        p = xdr_encode_fhandle(p, args->tofh);
+        p = xdr_encode_array(p, args->toname, args->tolen);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+        return 0;
+}
+
+/*
+ * Encode SYMLINK arguments
+ */
+static int
+nfs_xdr_symlinkargs(struct rpc_rqst *req, u32 *p, struct nfs_symlinkargs *args)
+{
+        p = xdr_encode_fhandle(p, args->fromfh);
+        p = xdr_encode_array(p, args->fromname, args->fromlen);
+        p = xdr_encode_array(p, args->topath, args->tolen);
+        p = xdr_encode_sattr(p, args->sattr);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+        return 0;
+}
+
+/*
+ * Encode arguments to readdir call
+ */
+static int
+nfs_xdr_readdirargs(struct rpc_rqst *req, u32 *p, struct nfs_readdirargs *args)
+{
+        struct rpc_task *task = req->rq_task;
+        struct rpc_auth *auth = task->tk_auth;
+        unsigned int replen;
+        u32 count = args->count;
+
+        p = xdr_encode_fhandle(p, args->fh);
+        *p++ = htonl(args->cookie);
+        *p++ = htonl(count); /* see above */
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+
+        /* Inline the page array */
+        replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readdirres_sz) << 2;
+        xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count);
+        return 0;
+}
+
+/*
+ * Decode the result of a readdir call.
+ * We're not really decoding anymore, we just leave the buffer untouched
+ * and only check that it is syntactically correct.
+ * The real decoding happens in nfs_decode_entry below, called directly
+ * from nfs_readdir for each entry.
+ */
+static int
+nfs_xdr_readdirres(struct rpc_rqst *req, u32 *p, void *dummy)
+{
+        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
+        struct kvec *iov = rcvbuf->head;
+        struct page **page;
+        int hdrlen, recvd;
+        int status, nr;
+        unsigned int len, pglen;
+        u32 *end, *entry, *kaddr;
+
+        if ((status = ntohl(*p++)))
+                return -nfs_stat_to_errno(status);
+
+        hdrlen = (u8 *) p - (u8 *) iov->iov_base;
+        if (iov->iov_len < hdrlen) {
+                printk(KERN_WARNING "NFS: READDIR reply header overflowed:"
+                                "length %d > %Zu\n", hdrlen, iov->iov_len);
+                return -errno_NFSERR_IO;
+        } else if (iov->iov_len != hdrlen) {
+                dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
+                xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
+        }
+
+        pglen = rcvbuf->page_len;
+        recvd = rcvbuf->len - hdrlen;
+        if (pglen > recvd)
+                pglen = recvd;
+        page = rcvbuf->pages;
+        kaddr = p = (u32 *)kmap_atomic(*page, KM_USER0);
+        end = (u32 *)((char *)p + pglen);
+        entry = p;
+        for (nr = 0; *p++; nr++) {
+                if (p + 2 > end)
+                        goto short_pkt;
+                p++; /* fileid */
+                len = ntohl(*p++);
+                p += XDR_QUADLEN(len) + 1;      /* name plus cookie */
+                if (len > NFS2_MAXNAMLEN) {
+                        printk(KERN_WARNING "NFS: giant filename in readdir (len 0x%x)!\n",
+                                                len);
+                        goto err_unmap;
+                }
+                if (p + 2 > end)
+                        goto short_pkt;
+                entry = p;
+        }
+        if (!nr && (entry[0] != 0 || entry[1] == 0))
+                goto short_pkt;
+ out:
+        kunmap_atomic(kaddr, KM_USER0);
+        return nr;
+ short_pkt:
+        entry[0] = entry[1] = 0;
+        /* truncate listing ? */
+        if (!nr) {
+                printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
+                entry[1] = 1;
+        }
+        goto out;
+err_unmap:
+        nr = -errno_NFSERR_IO;
+        goto out;
+}
+
+u32 *
+nfs_decode_dirent(u32 *p, struct nfs_entry *entry, int plus)
+{
+        if (!*p++) {
+                if (!*p)
+                        return ERR_PTR(-EAGAIN);
+                entry->eof = 1;
+                return ERR_PTR(-EBADCOOKIE);
+        }
+
+        entry->ino        = ntohl(*p++);
+        entry->len        = ntohl(*p++);
+        entry->name       = (const char *) p;
+        p                += XDR_QUADLEN(entry->len);
+        entry->prev_cookie        = entry->cookie;
+        entry->cookie     = ntohl(*p++);
+        entry->eof        = !p[0] && p[1];
+
+        return p;
+}
+
+/*
+ * NFS XDR decode functions
+ */
+/*
+ * Decode simple status reply
+ */
+static int
+nfs_xdr_stat(struct rpc_rqst *req, u32 *p, void *dummy)
+{
+        int     status;
+
+        if ((status = ntohl(*p++)) != 0)
+                status = -nfs_stat_to_errno(status);
+        return status;
+}
+
+/*
+ * Decode attrstat reply
+ * GETATTR, SETATTR, WRITE
+ */
+static int
+nfs_xdr_attrstat(struct rpc_rqst *req, u32 *p, struct nfs_fattr *fattr)
+{
+        int     status;
+
+        if ((status = ntohl(*p++)))
+                return -nfs_stat_to_errno(status);
+        xdr_decode_fattr(p, fattr);
+        return 0;
+}
+
+/*
+ * Decode diropres reply
+ * LOOKUP, CREATE, MKDIR
+ */
+static int
+nfs_xdr_diropres(struct rpc_rqst *req, u32 *p, struct nfs_diropok *res)
+{
+        int     status;
+
+        if ((status = ntohl(*p++)))
+                return -nfs_stat_to_errno(status);
+        p = xdr_decode_fhandle(p, res->fh);
+        xdr_decode_fattr(p, res->fattr);
+        return 0;
+}
+
+/*
+ * Encode READLINK args
+ */
+static int
+nfs_xdr_readlinkargs(struct rpc_rqst *req, u32 *p, struct nfs_readlinkargs *args)
+{
+        struct rpc_auth *auth = req->rq_task->tk_auth;
+        unsigned int replen;
+
+        p = xdr_encode_fhandle(p, args->fh);
+        req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+
+        /* Inline the page array */
+        replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readlinkres_sz) << 2;
+        xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen);
+        return 0;
+}
+
+/*
+ * Decode READLINK reply
+ */
+static int
+nfs_xdr_readlinkres(struct rpc_rqst *req, u32 *p, void *dummy)
+{
+        struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
+        struct kvec *iov = rcvbuf->head;
+        int hdrlen, len, recvd;
+        char    *kaddr;
+        int     status;
+
+        if ((status = ntohl(*p++)))
+                return -nfs_stat_to_errno(status);
+        /* Convert length of symlink */
+        len = ntohl(*p++);
+        if (len >= rcvbuf->page_len || len <= 0) {
+                dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
+                return -ENAMETOOLONG;
+        }
+        hdrlen = (u8 *) p - (u8 *) iov->iov_base;
+        if (iov->iov_len < hdrlen) {
+                printk(KERN_WARNING "NFS: READLINK reply header overflowed:"
+                                "length %d > %Zu\n", hdrlen, iov->iov_len);
+                return -errno_NFSERR_IO;
+        } else if (iov->iov_len != hdrlen) {
+                dprintk("NFS: READLINK header is short. iovec will be shifted.\n");
+                xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
+        }
+        recvd = req->rq_rcv_buf.len - hdrlen;
+        if (recvd < len) {
+                printk(KERN_WARNING "NFS: server cheating in readlink reply: "
+                                "count %u > recvd %u\n", len, recvd);
+                return -EIO;
+        }
+
+        /* NULL terminate the string we got */
+        kaddr = (char *)kmap_atomic(rcvbuf->pages[0], KM_USER0);
+        kaddr[len+rcvbuf->page_base] = '\0';
+        kunmap_atomic(kaddr, KM_USER0);
+        return 0;
+}
+
+/*
+ * Decode WRITE reply
+ */
+static int
+nfs_xdr_writeres(struct rpc_rqst *req, u32 *p, struct nfs_writeres *res)
+{
+        res->verf->committed = NFS_FILE_SYNC;
+        return nfs_xdr_attrstat(req, p, res->fattr);
+}
+
+/*
+ * Decode STATFS reply
+ */
+static int
+nfs_xdr_statfsres(struct rpc_rqst *req, u32 *p, struct nfs2_fsstat *res)
+{
+        int     status;
+
+        if ((status = ntohl(*p++)))
+                return -nfs_stat_to_errno(status);
+
+        res->tsize  = ntohl(*p++);
+        res->bsize  = ntohl(*p++);
+        res->blocks = ntohl(*p++);
+        res->bfree  = ntohl(*p++);
+        res->bavail = ntohl(*p++);
+        return 0;
+}
+
+/*
+ * We need to translate between nfs status return values and
+ * the local errno values which may not be the same.
+ */
+static struct {
+        int stat;
+        int errno;
+} nfs_errtbl[] = {
+        { NFS_OK,               0               },
+        { NFSERR_PERM,          EPERM           },
+        { NFSERR_NOENT,         ENOENT          },
+        { NFSERR_IO,            errno_NFSERR_IO },
+        { NFSERR_NXIO,          ENXIO           },
+/*      { NFSERR_EAGAIN,        EAGAIN          }, */
+        { NFSERR_ACCES,         EACCES          },
+        { NFSERR_EXIST,         EEXIST          },
+        { NFSERR_XDEV,          EXDEV           },
+        { 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       },
+        { NFSERR_DQUOT,         EDQUOT          },
+        { NFSERR_STALE,         ESTALE          },
+        { NFSERR_REMOTE,        EREMOTE         },
+#ifdef EWFLUSH
+        { NFSERR_WFLUSH,        EWFLUSH         },
+#endif
+        { NFSERR_BADHANDLE,     EBADHANDLE      },
+        { NFSERR_NOT_SYNC,      ENOTSYNC        },
+        { NFSERR_BAD_COOKIE,    EBADCOOKIE      },
+        { NFSERR_NOTSUPP,       ENOTSUPP        },
+        { NFSERR_TOOSMALL,      ETOOSMALL       },
+        { NFSERR_SERVERFAULT,   ESERVERFAULT    },
+        { NFSERR_BADTYPE,       EBADTYPE        },
+        { NFSERR_JUKEBOX,       EJUKEBOX        },
+        { -1,                   EIO             }
+};
+
+/*
+ * Convert an NFS error code to a local one.
+ * This one is used jointly by NFSv2 and NFSv3.
+ */
+int
+nfs_stat_to_errno(int stat)
+{
+        int i;
+
+        for (i = 0; nfs_errtbl[i].stat != -1; i++) {
+                if (nfs_errtbl[i].stat == stat)
+                        return nfs_errtbl[i].errno;
+        }
+        printk(KERN_ERR "nfs_stat_to_errno: bad nfs status return value: %d\n", stat);
+        return nfs_errtbl[i].errno;
+}
+
+#ifndef MAX
+# define MAX(a, b)      (((a) > (b))? (a) : (b))
+#endif
+
+#define PROC(proc, argtype, restype, timer)                             \
+[NFSPROC_##proc] = {                                                    \
+        .p_proc     =  NFSPROC_##proc,                                  \
+        .p_encode   =  (kxdrproc_t) nfs_xdr_##argtype,                  \
+        .p_decode   =  (kxdrproc_t) nfs_xdr_##restype,                  \
+        .p_bufsiz   =  MAX(NFS_##argtype##_sz,NFS_##restype##_sz) << 2, \
+        .p_timer    =  timer                                            \
+        }
+struct rpc_procinfo     nfs_procedures[] = {
+    PROC(GETATTR,       fhandle,        attrstat, 1),
+    PROC(SETATTR,       sattrargs,      attrstat, 0),
+    PROC(LOOKUP,        diropargs,      diropres, 2),
+    PROC(READLINK,      readlinkargs,   readlinkres, 3),
+    PROC(READ,          readargs,       readres, 3),
+    PROC(WRITE,         writeargs,      writeres, 4),
+    PROC(CREATE,        createargs,     diropres, 0),
+    PROC(REMOVE,        diropargs,      stat, 0),
+    PROC(RENAME,        renameargs,     stat, 0),
+    PROC(LINK,          linkargs,       stat, 0),
+    PROC(SYMLINK,       symlinkargs,    stat, 0),
+    PROC(MKDIR,         createargs,     diropres, 0),
+    PROC(RMDIR,         diropargs,      stat, 0),
+    PROC(READDIR,       readdirargs,    readdirres, 3),
+    PROC(STATFS,        fhandle,        statfsres, 0),
+};
+
+struct rpc_version              nfs_version2 = {
+        .number                 = 2,
+        .nrprocs                = sizeof(nfs_procedures)/sizeof(nfs_procedures[0]),
+        .procs                  = nfs_procedures
+};