2 * linux/fs/nfs/nfs2xdr.c
4 * XDR functions to encode/decode NFS RPC arguments and results.
6 * Copyright (C) 1992, 1993, 1994 Rick Sladkey
7 * Copyright (C) 1996 Olaf Kirch
8 * 04 Aug 1998 Ion Badulescu <ionut@cs.columbia.edu>
9 * FIFO's need special handling in NFSv2
12 #include <linux/param.h>
13 #include <linux/time.h>
15 #include <linux/errno.h>
16 #include <linux/string.h>
18 #include <linux/pagemap.h>
19 #include <linux/proc_fs.h>
20 #include <linux/sunrpc/clnt.h>
21 #include <linux/nfs.h>
22 #include <linux/nfs2.h>
23 #include <linux/nfs_fs.h>
26 #define NFSDBG_FACILITY NFSDBG_XDR
28 /* Mapping from NFS error code to "errno" error code. */
29 #define errno_NFSERR_IO EIO
32 * Declare the space requirements for NFS arguments and replies as
33 * number of 32bit-words
35 #define NFS_fhandle_sz (8)
36 #define NFS_sattr_sz (8)
37 #define NFS_filename_sz (1+(NFS2_MAXNAMLEN>>2))
38 #define NFS_path_sz (1+(NFS2_MAXPATHLEN>>2))
39 #define NFS_fattr_sz (17)
40 #define NFS_info_sz (5)
41 #define NFS_entry_sz (NFS_filename_sz+3)
43 #define NFS_diropargs_sz (NFS_fhandle_sz+NFS_filename_sz)
44 #define NFS_removeargs_sz (NFS_fhandle_sz+NFS_filename_sz)
45 #define NFS_sattrargs_sz (NFS_fhandle_sz+NFS_sattr_sz)
46 #define NFS_readlinkargs_sz (NFS_fhandle_sz)
47 #define NFS_readargs_sz (NFS_fhandle_sz+3)
48 #define NFS_writeargs_sz (NFS_fhandle_sz+4)
49 #define NFS_createargs_sz (NFS_diropargs_sz+NFS_sattr_sz)
50 #define NFS_renameargs_sz (NFS_diropargs_sz+NFS_diropargs_sz)
51 #define NFS_linkargs_sz (NFS_fhandle_sz+NFS_diropargs_sz)
52 #define NFS_symlinkargs_sz (NFS_diropargs_sz+1+NFS_sattr_sz)
53 #define NFS_readdirargs_sz (NFS_fhandle_sz+2)
55 #define NFS_attrstat_sz (1+NFS_fattr_sz)
56 #define NFS_diropres_sz (1+NFS_fhandle_sz+NFS_fattr_sz)
57 #define NFS_readlinkres_sz (2)
58 #define NFS_readres_sz (1+NFS_fattr_sz+1)
59 #define NFS_writeres_sz (NFS_attrstat_sz)
60 #define NFS_stat_sz (1)
61 #define NFS_readdirres_sz (1)
62 #define NFS_statfsres_sz (1+NFS_info_sz)
65 * Common NFS XDR functions as inlines
67 static inline __be32 *
68 xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fhandle)
70 memcpy(p, fhandle->data, NFS2_FHSIZE);
71 return p + XDR_QUADLEN(NFS2_FHSIZE);
74 static inline __be32 *
75 xdr_decode_fhandle(__be32 *p, struct nfs_fh *fhandle)
77 /* NFSv2 handles have a fixed length */
78 fhandle->size = NFS2_FHSIZE;
79 memcpy(fhandle->data, p, NFS2_FHSIZE);
80 return p + XDR_QUADLEN(NFS2_FHSIZE);
84 xdr_encode_time(__be32 *p, struct timespec *timep)
86 *p++ = htonl(timep->tv_sec);
87 /* Convert nanoseconds into microseconds */
88 *p++ = htonl(timep->tv_nsec ? timep->tv_nsec / 1000 : 0);
93 xdr_encode_current_server_time(__be32 *p, struct timespec *timep)
96 * Passing the invalid value useconds=1000000 is a
97 * Sun convention for "set to current server time".
98 * It's needed to make permissions checks for the
99 * "touch" program across v2 mounts to Solaris and
100 * Irix boxes work correctly. See description of
101 * sattr in section 6.1 of "NFS Illustrated" by
102 * Brent Callaghan, Addison-Wesley, ISBN 0-201-32750-5
104 *p++ = htonl(timep->tv_sec);
105 *p++ = htonl(1000000);
109 static inline __be32*
110 xdr_decode_time(__be32 *p, struct timespec *timep)
112 timep->tv_sec = ntohl(*p++);
113 /* Convert microseconds into nanoseconds */
114 timep->tv_nsec = ntohl(*p++) * 1000;
119 xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr)
123 fattr->mode = ntohl(*p++);
124 fattr->nlink = ntohl(*p++);
125 fattr->uid = ntohl(*p++);
126 fattr->gid = ntohl(*p++);
127 fattr->size = ntohl(*p++);
128 fattr->du.nfs2.blocksize = ntohl(*p++);
130 fattr->du.nfs2.blocks = ntohl(*p++);
131 fattr->fsid.major = ntohl(*p++);
132 fattr->fsid.minor = 0;
133 fattr->fileid = ntohl(*p++);
134 p = xdr_decode_time(p, &fattr->atime);
135 p = xdr_decode_time(p, &fattr->mtime);
136 p = xdr_decode_time(p, &fattr->ctime);
137 fattr->valid |= NFS_ATTR_FATTR_V2;
138 fattr->rdev = new_decode_dev(rdev);
139 if (type == NFCHR && rdev == NFS2_FIFO_DEV) {
140 fattr->mode = (fattr->mode & ~S_IFMT) | S_IFIFO;
146 static inline __be32 *
147 xdr_encode_sattr(__be32 *p, struct iattr *attr)
149 const __be32 not_set = __constant_htonl(0xFFFFFFFF);
151 *p++ = (attr->ia_valid & ATTR_MODE) ? htonl(attr->ia_mode) : not_set;
152 *p++ = (attr->ia_valid & ATTR_UID) ? htonl(attr->ia_uid) : not_set;
153 *p++ = (attr->ia_valid & ATTR_GID) ? htonl(attr->ia_gid) : not_set;
154 *p++ = (attr->ia_valid & ATTR_SIZE) ? htonl(attr->ia_size) : not_set;
156 if (attr->ia_valid & ATTR_ATIME_SET) {
157 p = xdr_encode_time(p, &attr->ia_atime);
158 } else if (attr->ia_valid & ATTR_ATIME) {
159 p = xdr_encode_current_server_time(p, &attr->ia_atime);
165 if (attr->ia_valid & ATTR_MTIME_SET) {
166 p = xdr_encode_time(p, &attr->ia_mtime);
167 } else if (attr->ia_valid & ATTR_MTIME) {
168 p = xdr_encode_current_server_time(p, &attr->ia_mtime);
177 * NFS encode functions
180 * Encode file handle argument
181 * GETATTR, READLINK, STATFS
184 nfs_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh)
186 p = xdr_encode_fhandle(p, fh);
187 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
192 * Encode SETATTR arguments
195 nfs_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs_sattrargs *args)
197 p = xdr_encode_fhandle(p, args->fh);
198 p = xdr_encode_sattr(p, args->sattr);
199 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
204 * Encode directory ops argument
208 nfs_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs_diropargs *args)
210 p = xdr_encode_fhandle(p, args->fh);
211 p = xdr_encode_array(p, args->name, args->len);
212 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
217 * Encode REMOVE argument
220 nfs_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
222 p = xdr_encode_fhandle(p, args->fh);
223 p = xdr_encode_array(p, args->name.name, args->name.len);
224 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
229 * Arguments to a READ call. Since we read data directly into the page
230 * cache, we also set up the reply iovec here so that iov[1] points
231 * exactly to the page we want to fetch.
234 nfs_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
236 struct rpc_auth *auth = req->rq_cred->cr_auth;
238 u32 offset = (u32)args->offset;
239 u32 count = args->count;
241 p = xdr_encode_fhandle(p, args->fh);
242 *p++ = htonl(offset);
245 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
247 /* Inline the page array */
248 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2;
249 xdr_inline_pages(&req->rq_rcv_buf, replen,
250 args->pages, args->pgbase, count);
251 req->rq_rcv_buf.flags |= XDRBUF_READ;
259 nfs_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res)
261 struct kvec *iov = req->rq_rcv_buf.head;
266 if ((status = ntohl(*p++)))
267 return nfs_stat_to_errno(status);
268 p = xdr_decode_fattr(p, res->fattr);
272 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
273 if (iov->iov_len < hdrlen) {
274 dprintk("NFS: READ reply header overflowed:"
275 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
276 return -errno_NFSERR_IO;
277 } else if (iov->iov_len != hdrlen) {
278 dprintk("NFS: READ header is short. iovec will be shifted.\n");
279 xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen);
282 recvd = req->rq_rcv_buf.len - hdrlen;
284 dprintk("NFS: server cheating in read reply: "
285 "count %u > recvd %u\n", count, recvd);
289 dprintk("RPC: readres OK count %u\n", count);
290 if (count < res->count)
298 * Write arguments. Splice the buffer to be written into the iovec.
301 nfs_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
303 struct xdr_buf *sndbuf = &req->rq_snd_buf;
304 u32 offset = (u32)args->offset;
305 u32 count = args->count;
307 p = xdr_encode_fhandle(p, args->fh);
308 *p++ = htonl(offset);
309 *p++ = htonl(offset);
312 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
314 /* Copy the page array */
315 xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
316 sndbuf->flags |= XDRBUF_WRITE;
321 * Encode create arguments
325 nfs_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs_createargs *args)
327 p = xdr_encode_fhandle(p, args->fh);
328 p = xdr_encode_array(p, args->name, args->len);
329 p = xdr_encode_sattr(p, args->sattr);
330 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
335 * Encode RENAME arguments
338 nfs_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs_renameargs *args)
340 p = xdr_encode_fhandle(p, args->old_dir);
341 p = xdr_encode_array(p, args->old_name->name, args->old_name->len);
342 p = xdr_encode_fhandle(p, args->new_dir);
343 p = xdr_encode_array(p, args->new_name->name, args->new_name->len);
344 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
349 * Encode LINK arguments
352 nfs_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs_linkargs *args)
354 p = xdr_encode_fhandle(p, args->fromfh);
355 p = xdr_encode_fhandle(p, args->tofh);
356 p = xdr_encode_array(p, args->toname, args->tolen);
357 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
362 * Encode SYMLINK arguments
365 nfs_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_symlinkargs *args)
367 struct xdr_buf *sndbuf = &req->rq_snd_buf;
370 p = xdr_encode_fhandle(p, args->fromfh);
371 p = xdr_encode_array(p, args->fromname, args->fromlen);
372 *p++ = htonl(args->pathlen);
373 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
375 xdr_encode_pages(sndbuf, args->pages, 0, args->pathlen);
378 * xdr_encode_pages may have added a few bytes to ensure the
379 * pathname ends on a 4-byte boundary. Start encoding the
380 * attributes after the pad bytes.
382 pad = sndbuf->tail->iov_len;
385 p = xdr_encode_sattr(p, args->sattr);
386 sndbuf->len += xdr_adjust_iovec(sndbuf->tail, p) - pad;
391 * Encode arguments to readdir call
394 nfs_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs_readdirargs *args)
396 struct rpc_auth *auth = req->rq_cred->cr_auth;
398 u32 count = args->count;
400 p = xdr_encode_fhandle(p, args->fh);
401 *p++ = htonl(args->cookie);
402 *p++ = htonl(count); /* see above */
403 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
405 /* Inline the page array */
406 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readdirres_sz) << 2;
407 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count);
412 * Decode the result of a readdir call.
413 * We're not really decoding anymore, we just leave the buffer untouched
414 * and only check that it is syntactically correct.
415 * The real decoding happens in nfs_decode_entry below, called directly
416 * from nfs_readdir for each entry.
419 nfs_xdr_readdirres(struct rpc_rqst *req, __be32 *p, void *dummy)
421 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
422 struct kvec *iov = rcvbuf->head;
425 unsigned int pglen, recvd;
428 __be32 *end, *entry, *kaddr;
430 if ((status = ntohl(*p++)))
431 return nfs_stat_to_errno(status);
433 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
434 if (iov->iov_len < hdrlen) {
435 dprintk("NFS: READDIR reply header overflowed:"
436 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
437 return -errno_NFSERR_IO;
438 } else if (iov->iov_len != hdrlen) {
439 dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
440 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
443 pglen = rcvbuf->page_len;
444 recvd = rcvbuf->len - hdrlen;
447 page = rcvbuf->pages;
448 kaddr = p = kmap_atomic(*page, KM_USER0);
449 end = (__be32 *)((char *)p + pglen);
452 /* Make sure the packet actually has a value_follows and EOF entry */
453 if ((entry + 1) > end)
461 p += XDR_QUADLEN(len) + 1; /* name plus cookie */
462 if (len > NFS2_MAXNAMLEN) {
463 dprintk("NFS: giant filename in readdir (len 0x%x)!\n",
473 * Apparently some server sends responses that are a valid size, but
474 * contain no entries, and have value_follows==0 and EOF==0. For
475 * those, just set the EOF marker.
477 if (!nr && entry[1] == 0) {
478 dprintk("NFS: readdir reply truncated!\n");
482 kunmap_atomic(kaddr, KM_USER0);
486 * When we get a short packet there are 2 possibilities. We can
487 * return an error, or fix up the response to look like a valid
488 * response and return what we have so far. If there are no
489 * entries and the packet was short, then return -EIO. If there
490 * are valid entries in the response, return them and pretend that
491 * the call was successful, but incomplete. The caller can retry the
492 * readdir starting at the last cookie.
494 entry[0] = entry[1] = 0;
496 nr = -errno_NFSERR_IO;
499 nr = -errno_NFSERR_IO;
503 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
505 dprintk("nfs: %s: prematurely hit end of receive buffer. "
506 "Remaining buffer length is %tu words.\n",
507 func, xdr->end - xdr->p);
511 nfs_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, int plus)
514 p = xdr_inline_decode(xdr, 4);
518 p = xdr_inline_decode(xdr, 4);
522 return ERR_PTR(-EAGAIN);
524 return ERR_PTR(-EBADCOOKIE);
527 p = xdr_inline_decode(xdr, 8);
531 entry->ino = ntohl(*p++);
532 entry->len = ntohl(*p++);
534 p = xdr_inline_decode(xdr, entry->len + 4);
537 entry->name = (const char *) p;
538 p += XDR_QUADLEN(entry->len);
539 entry->prev_cookie = entry->cookie;
540 entry->cookie = ntohl(*p++);
542 p = xdr_inline_peek(xdr, 8);
544 entry->eof = !p[0] && p[1];
551 print_overflow_msg(__func__, xdr);
552 return ERR_PTR(-EIO);
556 * NFS XDR decode functions
559 * Decode simple status reply
562 nfs_xdr_stat(struct rpc_rqst *req, __be32 *p, void *dummy)
566 if ((status = ntohl(*p++)) != 0)
567 status = nfs_stat_to_errno(status);
572 * Decode attrstat reply
573 * GETATTR, SETATTR, WRITE
576 nfs_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
580 if ((status = ntohl(*p++)))
581 return nfs_stat_to_errno(status);
582 xdr_decode_fattr(p, fattr);
587 * Decode diropres reply
588 * LOOKUP, CREATE, MKDIR
591 nfs_xdr_diropres(struct rpc_rqst *req, __be32 *p, struct nfs_diropok *res)
595 if ((status = ntohl(*p++)))
596 return nfs_stat_to_errno(status);
597 p = xdr_decode_fhandle(p, res->fh);
598 xdr_decode_fattr(p, res->fattr);
603 * Encode READLINK args
606 nfs_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs_readlinkargs *args)
608 struct rpc_auth *auth = req->rq_cred->cr_auth;
611 p = xdr_encode_fhandle(p, args->fh);
612 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
614 /* Inline the page array */
615 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readlinkres_sz) << 2;
616 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen);
621 * Decode READLINK reply
624 nfs_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, void *dummy)
626 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
627 struct kvec *iov = rcvbuf->head;
632 if ((status = ntohl(*p++)))
633 return nfs_stat_to_errno(status);
634 /* Convert length of symlink */
636 if (len >= rcvbuf->page_len) {
637 dprintk("nfs: server returned giant symlink!\n");
638 return -ENAMETOOLONG;
640 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
641 if (iov->iov_len < hdrlen) {
642 dprintk("NFS: READLINK reply header overflowed:"
643 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
644 return -errno_NFSERR_IO;
645 } else if (iov->iov_len != hdrlen) {
646 dprintk("NFS: READLINK header is short. iovec will be shifted.\n");
647 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
649 recvd = req->rq_rcv_buf.len - hdrlen;
651 dprintk("NFS: server cheating in readlink reply: "
652 "count %u > recvd %u\n", len, recvd);
656 xdr_terminate_string(rcvbuf, len);
664 nfs_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
666 res->verf->committed = NFS_FILE_SYNC;
667 return nfs_xdr_attrstat(req, p, res->fattr);
671 * Decode STATFS reply
674 nfs_xdr_statfsres(struct rpc_rqst *req, __be32 *p, struct nfs2_fsstat *res)
678 if ((status = ntohl(*p++)))
679 return nfs_stat_to_errno(status);
681 res->tsize = ntohl(*p++);
682 res->bsize = ntohl(*p++);
683 res->blocks = ntohl(*p++);
684 res->bfree = ntohl(*p++);
685 res->bavail = ntohl(*p++);
690 * We need to translate between nfs status return values and
691 * the local errno values which may not be the same.
698 { NFSERR_PERM, -EPERM },
699 { NFSERR_NOENT, -ENOENT },
700 { NFSERR_IO, -errno_NFSERR_IO},
701 { NFSERR_NXIO, -ENXIO },
702 /* { NFSERR_EAGAIN, -EAGAIN }, */
703 { NFSERR_ACCES, -EACCES },
704 { NFSERR_EXIST, -EEXIST },
705 { NFSERR_XDEV, -EXDEV },
706 { NFSERR_NODEV, -ENODEV },
707 { NFSERR_NOTDIR, -ENOTDIR },
708 { NFSERR_ISDIR, -EISDIR },
709 { NFSERR_INVAL, -EINVAL },
710 { NFSERR_FBIG, -EFBIG },
711 { NFSERR_NOSPC, -ENOSPC },
712 { NFSERR_ROFS, -EROFS },
713 { NFSERR_MLINK, -EMLINK },
714 { NFSERR_NAMETOOLONG, -ENAMETOOLONG },
715 { NFSERR_NOTEMPTY, -ENOTEMPTY },
716 { NFSERR_DQUOT, -EDQUOT },
717 { NFSERR_STALE, -ESTALE },
718 { NFSERR_REMOTE, -EREMOTE },
720 { NFSERR_WFLUSH, -EWFLUSH },
722 { NFSERR_BADHANDLE, -EBADHANDLE },
723 { NFSERR_NOT_SYNC, -ENOTSYNC },
724 { NFSERR_BAD_COOKIE, -EBADCOOKIE },
725 { NFSERR_NOTSUPP, -ENOTSUPP },
726 { NFSERR_TOOSMALL, -ETOOSMALL },
727 { NFSERR_SERVERFAULT, -EREMOTEIO },
728 { NFSERR_BADTYPE, -EBADTYPE },
729 { NFSERR_JUKEBOX, -EJUKEBOX },
734 * Convert an NFS error code to a local one.
735 * This one is used jointly by NFSv2 and NFSv3.
738 nfs_stat_to_errno(int stat)
742 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
743 if (nfs_errtbl[i].stat == stat)
744 return nfs_errtbl[i].errno;
746 dprintk("nfs_stat_to_errno: bad nfs status return value: %d\n", stat);
747 return nfs_errtbl[i].errno;
750 #define PROC(proc, argtype, restype, timer) \
751 [NFSPROC_##proc] = { \
752 .p_proc = NFSPROC_##proc, \
753 .p_encode = (kxdrproc_t) nfs_xdr_##argtype, \
754 .p_decode = (kxdrproc_t) nfs_xdr_##restype, \
755 .p_arglen = NFS_##argtype##_sz, \
756 .p_replen = NFS_##restype##_sz, \
758 .p_statidx = NFSPROC_##proc, \
761 struct rpc_procinfo nfs_procedures[] = {
762 PROC(GETATTR, fhandle, attrstat, 1),
763 PROC(SETATTR, sattrargs, attrstat, 0),
764 PROC(LOOKUP, diropargs, diropres, 2),
765 PROC(READLINK, readlinkargs, readlinkres, 3),
766 PROC(READ, readargs, readres, 3),
767 PROC(WRITE, writeargs, writeres, 4),
768 PROC(CREATE, createargs, diropres, 0),
769 PROC(REMOVE, removeargs, stat, 0),
770 PROC(RENAME, renameargs, stat, 0),
771 PROC(LINK, linkargs, stat, 0),
772 PROC(SYMLINK, symlinkargs, stat, 0),
773 PROC(MKDIR, createargs, diropres, 0),
774 PROC(RMDIR, diropargs, stat, 0),
775 PROC(READDIR, readdirargs, readdirres, 3),
776 PROC(STATFS, fhandle, statfsres, 0),
779 struct rpc_version nfs_version2 = {
781 .nrprocs = ARRAY_SIZE(nfs_procedures),
782 .procs = nfs_procedures