2 * linux/fs/nfs/nfs3xdr.c
4 * XDR functions to encode/decode NFSv3 RPC arguments and results.
6 * Copyright (C) 1996, 1997 Olaf Kirch
9 #include <linux/param.h>
10 #include <linux/time.h>
12 #include <linux/errno.h>
13 #include <linux/string.h>
15 #include <linux/pagemap.h>
16 #include <linux/proc_fs.h>
17 #include <linux/kdev_t.h>
18 #include <linux/sunrpc/clnt.h>
19 #include <linux/nfs.h>
20 #include <linux/nfs3.h>
21 #include <linux/nfs_fs.h>
22 #include <linux/nfsacl.h>
25 #define NFSDBG_FACILITY NFSDBG_XDR
27 /* Mapping from NFS error code to "errno" error code. */
28 #define errno_NFSERR_IO EIO
31 * Declare the space requirements for NFS arguments and replies as
32 * number of 32bit-words
34 #define NFS3_fhandle_sz (1+16)
35 #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
36 #define NFS3_sattr_sz (15)
37 #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
38 #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
39 #define NFS3_fattr_sz (21)
40 #define NFS3_wcc_attr_sz (6)
41 #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
42 #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
43 #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
44 #define NFS3_fsstat_sz
45 #define NFS3_fsinfo_sz
46 #define NFS3_pathconf_sz
47 #define NFS3_entry_sz (NFS3_filename_sz+3)
49 #define NFS3_sattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
50 #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
51 #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
52 #define NFS3_accessargs_sz (NFS3_fh_sz+1)
53 #define NFS3_readlinkargs_sz (NFS3_fh_sz)
54 #define NFS3_readargs_sz (NFS3_fh_sz+3)
55 #define NFS3_writeargs_sz (NFS3_fh_sz+5)
56 #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
57 #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
58 #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
59 #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
60 #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
61 #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
62 #define NFS3_readdirargs_sz (NFS3_fh_sz+2)
63 #define NFS3_commitargs_sz (NFS3_fh_sz+3)
65 #define NFS3_attrstat_sz (1+NFS3_fattr_sz)
66 #define NFS3_wccstat_sz (1+NFS3_wcc_data_sz)
67 #define NFS3_removeres_sz (NFS3_wccstat_sz)
68 #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
69 #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
70 #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1)
71 #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3)
72 #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
73 #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
74 #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz))
75 #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
76 #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2)
77 #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13)
78 #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12)
79 #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6)
80 #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
82 #define ACL3_getaclargs_sz (NFS3_fh_sz+1)
83 #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \
84 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
85 #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \
86 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
87 #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
90 * Map file type to S_IFMT bits
92 static const umode_t nfs_type2fmt[] = {
104 * Common NFS XDR functions as inlines
106 static inline __be32 *
107 xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fh)
109 return xdr_encode_array(p, fh->data, fh->size);
112 static inline __be32 *
113 xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh)
115 if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) {
116 memcpy(fh->data, p, fh->size);
117 return p + XDR_QUADLEN(fh->size);
123 * Encode/decode time.
125 static inline __be32 *
126 xdr_encode_time3(__be32 *p, struct timespec *timep)
128 *p++ = htonl(timep->tv_sec);
129 *p++ = htonl(timep->tv_nsec);
133 static inline __be32 *
134 xdr_decode_time3(__be32 *p, struct timespec *timep)
136 timep->tv_sec = ntohl(*p++);
137 timep->tv_nsec = ntohl(*p++);
142 xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr)
144 unsigned int type, major, minor;
150 fmode = nfs_type2fmt[type];
151 fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode;
152 fattr->nlink = ntohl(*p++);
153 fattr->uid = ntohl(*p++);
154 fattr->gid = ntohl(*p++);
155 p = xdr_decode_hyper(p, &fattr->size);
156 p = xdr_decode_hyper(p, &fattr->du.nfs3.used);
158 /* Turn remote device info into Linux-specific dev_t */
161 fattr->rdev = MKDEV(major, minor);
162 if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor)
165 p = xdr_decode_hyper(p, &fattr->fsid.major);
166 fattr->fsid.minor = 0;
167 p = xdr_decode_hyper(p, &fattr->fileid);
168 p = xdr_decode_time3(p, &fattr->atime);
169 p = xdr_decode_time3(p, &fattr->mtime);
170 p = xdr_decode_time3(p, &fattr->ctime);
172 /* Update the mode bits */
173 fattr->valid |= NFS_ATTR_FATTR_V3;
177 static inline __be32 *
178 xdr_encode_sattr(__be32 *p, struct iattr *attr)
180 if (attr->ia_valid & ATTR_MODE) {
182 *p++ = htonl(attr->ia_mode & S_IALLUGO);
186 if (attr->ia_valid & ATTR_UID) {
188 *p++ = htonl(attr->ia_uid);
192 if (attr->ia_valid & ATTR_GID) {
194 *p++ = htonl(attr->ia_gid);
198 if (attr->ia_valid & ATTR_SIZE) {
200 p = xdr_encode_hyper(p, (__u64) attr->ia_size);
204 if (attr->ia_valid & ATTR_ATIME_SET) {
206 p = xdr_encode_time3(p, &attr->ia_atime);
207 } else if (attr->ia_valid & ATTR_ATIME) {
212 if (attr->ia_valid & ATTR_MTIME_SET) {
214 p = xdr_encode_time3(p, &attr->ia_mtime);
215 } else if (attr->ia_valid & ATTR_MTIME) {
223 static inline __be32 *
224 xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr)
226 p = xdr_decode_hyper(p, &fattr->pre_size);
227 p = xdr_decode_time3(p, &fattr->pre_mtime);
228 p = xdr_decode_time3(p, &fattr->pre_ctime);
229 fattr->valid |= NFS_ATTR_FATTR_PRESIZE
230 | NFS_ATTR_FATTR_PREMTIME
231 | NFS_ATTR_FATTR_PRECTIME;
235 static inline __be32 *
236 xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr)
239 p = xdr_decode_fattr(p, fattr);
243 static inline __be32 *
244 xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr)
247 return xdr_decode_wcc_attr(p, fattr);
252 static inline __be32 *
253 xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr)
255 p = xdr_decode_pre_op_attr(p, fattr);
256 return xdr_decode_post_op_attr(p, fattr);
260 * NFS encode functions
264 * Encode file handle argument
267 nfs3_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh)
269 p = xdr_encode_fhandle(p, fh);
270 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
275 * Encode SETATTR arguments
278 nfs3_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs3_sattrargs *args)
280 p = xdr_encode_fhandle(p, args->fh);
281 p = xdr_encode_sattr(p, args->sattr);
282 *p++ = htonl(args->guard);
284 p = xdr_encode_time3(p, &args->guardtime);
285 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
290 * Encode directory ops argument
293 nfs3_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs3_diropargs *args)
295 p = xdr_encode_fhandle(p, args->fh);
296 p = xdr_encode_array(p, args->name, args->len);
297 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
302 * Encode REMOVE argument
305 nfs3_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
307 p = xdr_encode_fhandle(p, args->fh);
308 p = xdr_encode_array(p, args->name.name, args->name.len);
309 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
314 * Encode access() argument
317 nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *args)
319 p = xdr_encode_fhandle(p, args->fh);
320 *p++ = htonl(args->access);
321 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
326 * Arguments to a READ call. Since we read data directly into the page
327 * cache, we also set up the reply iovec here so that iov[1] points
328 * exactly to the page we want to fetch.
331 nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
333 struct rpc_auth *auth = req->rq_cred->cr_auth;
335 u32 count = args->count;
337 p = xdr_encode_fhandle(p, args->fh);
338 p = xdr_encode_hyper(p, args->offset);
340 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
342 /* Inline the page array */
343 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2;
344 xdr_inline_pages(&req->rq_rcv_buf, replen,
345 args->pages, args->pgbase, count);
346 req->rq_rcv_buf.flags |= XDRBUF_READ;
351 * Write arguments. Splice the buffer to be written into the iovec.
354 nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
356 struct xdr_buf *sndbuf = &req->rq_snd_buf;
357 u32 count = args->count;
359 p = xdr_encode_fhandle(p, args->fh);
360 p = xdr_encode_hyper(p, args->offset);
362 *p++ = htonl(args->stable);
364 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
366 /* Copy the page array */
367 xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
368 sndbuf->flags |= XDRBUF_WRITE;
373 * Encode CREATE arguments
376 nfs3_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs3_createargs *args)
378 p = xdr_encode_fhandle(p, args->fh);
379 p = xdr_encode_array(p, args->name, args->len);
381 *p++ = htonl(args->createmode);
382 if (args->createmode == NFS3_CREATE_EXCLUSIVE) {
383 *p++ = args->verifier[0];
384 *p++ = args->verifier[1];
386 p = xdr_encode_sattr(p, args->sattr);
388 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
393 * Encode MKDIR arguments
396 nfs3_xdr_mkdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mkdirargs *args)
398 p = xdr_encode_fhandle(p, args->fh);
399 p = xdr_encode_array(p, args->name, args->len);
400 p = xdr_encode_sattr(p, args->sattr);
401 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
406 * Encode SYMLINK arguments
409 nfs3_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_symlinkargs *args)
411 p = xdr_encode_fhandle(p, args->fromfh);
412 p = xdr_encode_array(p, args->fromname, args->fromlen);
413 p = xdr_encode_sattr(p, args->sattr);
414 *p++ = htonl(args->pathlen);
415 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
418 xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen);
423 * Encode MKNOD arguments
426 nfs3_xdr_mknodargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mknodargs *args)
428 p = xdr_encode_fhandle(p, args->fh);
429 p = xdr_encode_array(p, args->name, args->len);
430 *p++ = htonl(args->type);
431 p = xdr_encode_sattr(p, args->sattr);
432 if (args->type == NF3CHR || args->type == NF3BLK) {
433 *p++ = htonl(MAJOR(args->rdev));
434 *p++ = htonl(MINOR(args->rdev));
437 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
442 * Encode RENAME arguments
445 nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs3_renameargs *args)
447 p = xdr_encode_fhandle(p, args->fromfh);
448 p = xdr_encode_array(p, args->fromname, args->fromlen);
449 p = xdr_encode_fhandle(p, args->tofh);
450 p = xdr_encode_array(p, args->toname, args->tolen);
451 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
456 * Encode LINK arguments
459 nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args)
461 p = xdr_encode_fhandle(p, args->fromfh);
462 p = xdr_encode_fhandle(p, args->tofh);
463 p = xdr_encode_array(p, args->toname, args->tolen);
464 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
469 * Encode arguments to readdir call
472 nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args)
474 struct rpc_auth *auth = req->rq_cred->cr_auth;
476 u32 count = args->count;
478 p = xdr_encode_fhandle(p, args->fh);
479 p = xdr_encode_hyper(p, args->cookie);
480 *p++ = args->verf[0];
481 *p++ = args->verf[1];
483 /* readdirplus: need dircount + buffer size.
484 * We just make sure we make dircount big enough */
485 *p++ = htonl(count >> 3);
488 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
490 /* Inline the page array */
491 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2;
492 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count);
497 * Decode the result of a readdir call.
498 * We just check for syntactical correctness.
501 nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res)
503 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
504 struct kvec *iov = rcvbuf->head;
507 u32 len, recvd, pglen;
509 __be32 *entry, *end, *kaddr;
511 status = ntohl(*p++);
512 /* Decode post_op_attrs */
513 p = xdr_decode_post_op_attr(p, res->dir_attr);
515 return nfs_stat_to_errno(status);
516 /* Decode verifier cookie */
524 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
525 if (iov->iov_len < hdrlen) {
526 dprintk("NFS: READDIR reply header overflowed:"
527 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
528 return -errno_NFSERR_IO;
529 } else if (iov->iov_len != hdrlen) {
530 dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
531 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
534 pglen = rcvbuf->page_len;
535 recvd = rcvbuf->len - hdrlen;
538 page = rcvbuf->pages;
539 kaddr = p = kmap_atomic(*page, KM_USER0);
540 end = (__be32 *)((char *)p + pglen);
543 /* Make sure the packet actually has a value_follows and EOF entry */
544 if ((entry + 1) > end)
550 p += 2; /* inode # */
551 len = ntohl(*p++); /* string length */
552 p += XDR_QUADLEN(len) + 2; /* name + cookie */
553 if (len > NFS3_MAXNAMLEN) {
554 dprintk("NFS: giant filename in readdir (len 0x%x)!\n",
573 if (len > NFS3_FHSIZE) {
574 dprintk("NFS: giant filehandle in "
575 "readdir (len 0x%x)!\n", len);
578 p += XDR_QUADLEN(len);
588 * Apparently some server sends responses that are a valid size, but
589 * contain no entries, and have value_follows==0 and EOF==0. For
590 * those, just set the EOF marker.
592 if (!nr && entry[1] == 0) {
593 dprintk("NFS: readdir reply truncated!\n");
597 kunmap_atomic(kaddr, KM_USER0);
601 * When we get a short packet there are 2 possibilities. We can
602 * return an error, or fix up the response to look like a valid
603 * response and return what we have so far. If there are no
604 * entries and the packet was short, then return -EIO. If there
605 * are valid entries in the response, return them and pretend that
606 * the call was successful, but incomplete. The caller can retry the
607 * readdir starting at the last cookie.
609 entry[0] = entry[1] = 0;
611 nr = -errno_NFSERR_IO;
614 nr = -errno_NFSERR_IO;
619 nfs3_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
621 struct nfs_entry old = *entry;
625 return ERR_PTR(-EAGAIN);
627 return ERR_PTR(-EBADCOOKIE);
630 p = xdr_decode_hyper(p, &entry->ino);
631 entry->len = ntohl(*p++);
632 entry->name = (const char *) p;
633 p += XDR_QUADLEN(entry->len);
634 entry->prev_cookie = entry->cookie;
635 p = xdr_decode_hyper(p, &entry->cookie);
638 entry->fattr->valid = 0;
639 p = xdr_decode_post_op_attr(p, entry->fattr);
640 /* In fact, a post_op_fh3: */
642 p = xdr_decode_fhandle(p, entry->fh);
643 /* Ugh -- server reply was truncated */
645 dprintk("NFS: FH truncated\n");
647 return ERR_PTR(-EAGAIN);
650 memset((u8*)(entry->fh), 0, sizeof(*entry->fh));
653 entry->eof = !p[0] && p[1];
658 * Encode COMMIT arguments
661 nfs3_xdr_commitargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
663 p = xdr_encode_fhandle(p, args->fh);
664 p = xdr_encode_hyper(p, args->offset);
665 *p++ = htonl(args->count);
666 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
670 #ifdef CONFIG_NFS_V3_ACL
672 * Encode GETACL arguments
675 nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p,
676 struct nfs3_getaclargs *args)
678 struct rpc_auth *auth = req->rq_cred->cr_auth;
681 p = xdr_encode_fhandle(p, args->fh);
682 *p++ = htonl(args->mask);
683 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
685 if (args->mask & (NFS_ACL | NFS_DFACL)) {
686 /* Inline the page array */
687 replen = (RPC_REPHDRSIZE + auth->au_rslack +
688 ACL3_getaclres_sz) << 2;
689 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0,
690 NFSACL_MAXPAGES << PAGE_SHIFT);
696 * Encode SETACL arguments
699 nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p,
700 struct nfs3_setaclargs *args)
702 struct xdr_buf *buf = &req->rq_snd_buf;
706 p = xdr_encode_fhandle(p, NFS_FH(args->inode));
707 *p++ = htonl(args->mask);
708 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
711 if (args->npages != 0)
712 xdr_encode_pages(buf, args->pages, 0, args->len);
714 req->rq_slen = xdr_adjust_iovec(req->rq_svec,
715 p + XDR_QUADLEN(args->len));
717 err = nfsacl_encode(buf, base, args->inode,
718 (args->mask & NFS_ACL) ?
719 args->acl_access : NULL, 1, 0);
721 err = nfsacl_encode(buf, base + err, args->inode,
722 (args->mask & NFS_DFACL) ?
723 args->acl_default : NULL, 1,
725 return (err > 0) ? 0 : err;
727 #endif /* CONFIG_NFS_V3_ACL */
730 * NFS XDR decode functions
734 * Decode attrstat reply.
737 nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
741 if ((status = ntohl(*p++)))
742 return nfs_stat_to_errno(status);
743 xdr_decode_fattr(p, fattr);
748 * Decode status+wcc_data reply
749 * SATTR, REMOVE, RMDIR
752 nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
756 if ((status = ntohl(*p++)))
757 status = nfs_stat_to_errno(status);
758 xdr_decode_wcc_data(p, fattr);
763 nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res)
765 return nfs3_xdr_wccstat(req, p, res->dir_attr);
769 * Decode LOOKUP reply
772 nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
776 if ((status = ntohl(*p++))) {
777 status = nfs_stat_to_errno(status);
779 if (!(p = xdr_decode_fhandle(p, res->fh)))
780 return -errno_NFSERR_IO;
781 p = xdr_decode_post_op_attr(p, res->fattr);
783 xdr_decode_post_op_attr(p, res->dir_attr);
788 * Decode ACCESS reply
791 nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res)
793 int status = ntohl(*p++);
795 p = xdr_decode_post_op_attr(p, res->fattr);
797 return nfs_stat_to_errno(status);
798 res->access = ntohl(*p++);
803 nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args)
805 struct rpc_auth *auth = req->rq_cred->cr_auth;
808 p = xdr_encode_fhandle(p, args->fh);
809 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
811 /* Inline the page array */
812 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2;
813 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen);
818 * Decode READLINK reply
821 nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
823 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
824 struct kvec *iov = rcvbuf->head;
830 status = ntohl(*p++);
831 p = xdr_decode_post_op_attr(p, fattr);
834 return nfs_stat_to_errno(status);
836 /* Convert length of symlink */
838 if (len >= rcvbuf->page_len) {
839 dprintk("nfs: server returned giant symlink!\n");
840 return -ENAMETOOLONG;
843 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
844 if (iov->iov_len < hdrlen) {
845 dprintk("NFS: READLINK reply header overflowed:"
846 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
847 return -errno_NFSERR_IO;
848 } else if (iov->iov_len != hdrlen) {
849 dprintk("NFS: READLINK header is short. "
850 "iovec will be shifted.\n");
851 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
853 recvd = req->rq_rcv_buf.len - hdrlen;
855 dprintk("NFS: server cheating in readlink reply: "
856 "count %u > recvd %u\n", len, recvd);
860 /* NULL terminate the string we got */
861 kaddr = (char*)kmap_atomic(rcvbuf->pages[0], KM_USER0);
862 kaddr[len+rcvbuf->page_base] = '\0';
863 kunmap_atomic(kaddr, KM_USER0);
871 nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res)
873 struct kvec *iov = req->rq_rcv_buf.head;
875 u32 count, ocount, recvd;
878 status = ntohl(*p++);
879 p = xdr_decode_post_op_attr(p, res->fattr);
882 return nfs_stat_to_errno(status);
884 /* Decode reply count and EOF flag. NFSv3 is somewhat redundant
885 * in that it puts the count both in the res struct and in the
886 * opaque data count. */
888 res->eof = ntohl(*p++);
889 ocount = ntohl(*p++);
891 if (ocount != count) {
892 dprintk("NFS: READ count doesn't match RPC opaque count.\n");
893 return -errno_NFSERR_IO;
896 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
897 if (iov->iov_len < hdrlen) {
898 dprintk("NFS: READ reply header overflowed:"
899 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
900 return -errno_NFSERR_IO;
901 } else if (iov->iov_len != hdrlen) {
902 dprintk("NFS: READ header is short. iovec will be shifted.\n");
903 xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen);
906 recvd = req->rq_rcv_buf.len - hdrlen;
908 dprintk("NFS: server cheating in read reply: "
909 "count %u > recvd %u\n", count, recvd);
914 if (count < res->count)
921 * Decode WRITE response
924 nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
928 status = ntohl(*p++);
929 p = xdr_decode_wcc_data(p, res->fattr);
932 return nfs_stat_to_errno(status);
934 res->count = ntohl(*p++);
935 res->verf->committed = (enum nfs3_stable_how)ntohl(*p++);
936 res->verf->verifier[0] = *p++;
937 res->verf->verifier[1] = *p++;
943 * Decode a CREATE response
946 nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
950 status = ntohl(*p++);
953 if (!(p = xdr_decode_fhandle(p, res->fh)))
954 return -errno_NFSERR_IO;
955 p = xdr_decode_post_op_attr(p, res->fattr);
957 memset(res->fh, 0, sizeof(*res->fh));
958 /* Do decode post_op_attr but set it to NULL */
959 p = xdr_decode_post_op_attr(p, res->fattr);
960 res->fattr->valid = 0;
963 status = nfs_stat_to_errno(status);
965 p = xdr_decode_wcc_data(p, res->dir_attr);
970 * Decode RENAME reply
973 nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs3_renameres *res)
977 if ((status = ntohl(*p++)) != 0)
978 status = nfs_stat_to_errno(status);
979 p = xdr_decode_wcc_data(p, res->fromattr);
980 p = xdr_decode_wcc_data(p, res->toattr);
988 nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res)
992 if ((status = ntohl(*p++)) != 0)
993 status = nfs_stat_to_errno(status);
994 p = xdr_decode_post_op_attr(p, res->fattr);
995 p = xdr_decode_wcc_data(p, res->dir_attr);
1000 * Decode FSSTAT reply
1003 nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res)
1007 status = ntohl(*p++);
1009 p = xdr_decode_post_op_attr(p, res->fattr);
1011 return nfs_stat_to_errno(status);
1013 p = xdr_decode_hyper(p, &res->tbytes);
1014 p = xdr_decode_hyper(p, &res->fbytes);
1015 p = xdr_decode_hyper(p, &res->abytes);
1016 p = xdr_decode_hyper(p, &res->tfiles);
1017 p = xdr_decode_hyper(p, &res->ffiles);
1018 p = xdr_decode_hyper(p, &res->afiles);
1020 /* ignore invarsec */
1025 * Decode FSINFO reply
1028 nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res)
1032 status = ntohl(*p++);
1034 p = xdr_decode_post_op_attr(p, res->fattr);
1036 return nfs_stat_to_errno(status);
1038 res->rtmax = ntohl(*p++);
1039 res->rtpref = ntohl(*p++);
1040 res->rtmult = ntohl(*p++);
1041 res->wtmax = ntohl(*p++);
1042 res->wtpref = ntohl(*p++);
1043 res->wtmult = ntohl(*p++);
1044 res->dtpref = ntohl(*p++);
1045 p = xdr_decode_hyper(p, &res->maxfilesize);
1047 /* ignore time_delta and properties */
1048 res->lease_time = 0;
1053 * Decode PATHCONF reply
1056 nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res)
1060 status = ntohl(*p++);
1062 p = xdr_decode_post_op_attr(p, res->fattr);
1064 return nfs_stat_to_errno(status);
1065 res->max_link = ntohl(*p++);
1066 res->max_namelen = ntohl(*p++);
1068 /* ignore remaining fields */
1073 * Decode COMMIT reply
1076 nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
1080 status = ntohl(*p++);
1081 p = xdr_decode_wcc_data(p, res->fattr);
1083 return nfs_stat_to_errno(status);
1085 res->verf->verifier[0] = *p++;
1086 res->verf->verifier[1] = *p++;
1090 #ifdef CONFIG_NFS_V3_ACL
1092 * Decode GETACL reply
1095 nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p,
1096 struct nfs3_getaclres *res)
1098 struct xdr_buf *buf = &req->rq_rcv_buf;
1099 int status = ntohl(*p++);
1100 struct posix_acl **acl;
1101 unsigned int *aclcnt;
1105 return nfs_stat_to_errno(status);
1106 p = xdr_decode_post_op_attr(p, res->fattr);
1107 res->mask = ntohl(*p++);
1108 if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
1110 base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base;
1112 acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL;
1113 aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL;
1114 err = nfsacl_decode(buf, base, aclcnt, acl);
1116 acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL;
1117 aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL;
1119 err = nfsacl_decode(buf, base + err, aclcnt, acl);
1120 return (err > 0) ? 0 : err;
1124 * Decode setacl reply.
1127 nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
1129 int status = ntohl(*p++);
1132 return nfs_stat_to_errno(status);
1133 xdr_decode_post_op_attr(p, fattr);
1136 #endif /* CONFIG_NFS_V3_ACL */
1138 #define PROC(proc, argtype, restype, timer) \
1139 [NFS3PROC_##proc] = { \
1140 .p_proc = NFS3PROC_##proc, \
1141 .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \
1142 .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \
1143 .p_arglen = NFS3_##argtype##_sz, \
1144 .p_replen = NFS3_##restype##_sz, \
1146 .p_statidx = NFS3PROC_##proc, \
1150 struct rpc_procinfo nfs3_procedures[] = {
1151 PROC(GETATTR, fhandle, attrstat, 1),
1152 PROC(SETATTR, sattrargs, wccstat, 0),
1153 PROC(LOOKUP, diropargs, lookupres, 2),
1154 PROC(ACCESS, accessargs, accessres, 1),
1155 PROC(READLINK, readlinkargs, readlinkres, 3),
1156 PROC(READ, readargs, readres, 3),
1157 PROC(WRITE, writeargs, writeres, 4),
1158 PROC(CREATE, createargs, createres, 0),
1159 PROC(MKDIR, mkdirargs, createres, 0),
1160 PROC(SYMLINK, symlinkargs, createres, 0),
1161 PROC(MKNOD, mknodargs, createres, 0),
1162 PROC(REMOVE, removeargs, removeres, 0),
1163 PROC(RMDIR, diropargs, wccstat, 0),
1164 PROC(RENAME, renameargs, renameres, 0),
1165 PROC(LINK, linkargs, linkres, 0),
1166 PROC(READDIR, readdirargs, readdirres, 3),
1167 PROC(READDIRPLUS, readdirargs, readdirres, 3),
1168 PROC(FSSTAT, fhandle, fsstatres, 0),
1169 PROC(FSINFO, fhandle, fsinfores, 0),
1170 PROC(PATHCONF, fhandle, pathconfres, 0),
1171 PROC(COMMIT, commitargs, commitres, 5),
1174 struct rpc_version nfs_version3 = {
1176 .nrprocs = ARRAY_SIZE(nfs3_procedures),
1177 .procs = nfs3_procedures
1180 #ifdef CONFIG_NFS_V3_ACL
1181 static struct rpc_procinfo nfs3_acl_procedures[] = {
1182 [ACLPROC3_GETACL] = {
1183 .p_proc = ACLPROC3_GETACL,
1184 .p_encode = (kxdrproc_t) nfs3_xdr_getaclargs,
1185 .p_decode = (kxdrproc_t) nfs3_xdr_getaclres,
1186 .p_arglen = ACL3_getaclargs_sz,
1187 .p_replen = ACL3_getaclres_sz,
1191 [ACLPROC3_SETACL] = {
1192 .p_proc = ACLPROC3_SETACL,
1193 .p_encode = (kxdrproc_t) nfs3_xdr_setaclargs,
1194 .p_decode = (kxdrproc_t) nfs3_xdr_setaclres,
1195 .p_arglen = ACL3_setaclargs_sz,
1196 .p_replen = ACL3_setaclres_sz,
1202 struct rpc_version nfsacl_version3 = {
1204 .nrprocs = sizeof(nfs3_acl_procedures)/
1205 sizeof(nfs3_acl_procedures[0]),
1206 .procs = nfs3_acl_procedures,
1208 #endif /* CONFIG_NFS_V3_ACL */