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/slab.h>
13 #include <linux/utsname.h>
14 #include <linux/errno.h>
15 #include <linux/string.h>
17 #include <linux/pagemap.h>
18 #include <linux/proc_fs.h>
19 #include <linux/kdev_t.h>
20 #include <linux/sunrpc/clnt.h>
21 #include <linux/nfs.h>
22 #include <linux/nfs3.h>
23 #include <linux/nfs_fs.h>
24 #include <linux/nfsacl.h>
27 #define NFSDBG_FACILITY NFSDBG_XDR
29 /* Mapping from NFS error code to "errno" error code. */
30 #define errno_NFSERR_IO EIO
33 * Declare the space requirements for NFS arguments and replies as
34 * number of 32bit-words
36 #define NFS3_fhandle_sz (1+16)
37 #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
38 #define NFS3_sattr_sz (15)
39 #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
40 #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
41 #define NFS3_fattr_sz (21)
42 #define NFS3_wcc_attr_sz (6)
43 #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
44 #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
45 #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
46 #define NFS3_fsstat_sz
47 #define NFS3_fsinfo_sz
48 #define NFS3_pathconf_sz
49 #define NFS3_entry_sz (NFS3_filename_sz+3)
51 #define NFS3_sattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
52 #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
53 #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
54 #define NFS3_accessargs_sz (NFS3_fh_sz+1)
55 #define NFS3_readlinkargs_sz (NFS3_fh_sz)
56 #define NFS3_readargs_sz (NFS3_fh_sz+3)
57 #define NFS3_writeargs_sz (NFS3_fh_sz+5)
58 #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
59 #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
60 #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
61 #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
62 #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
63 #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
64 #define NFS3_readdirargs_sz (NFS3_fh_sz+2)
65 #define NFS3_commitargs_sz (NFS3_fh_sz+3)
67 #define NFS3_attrstat_sz (1+NFS3_fattr_sz)
68 #define NFS3_wccstat_sz (1+NFS3_wcc_data_sz)
69 #define NFS3_removeres_sz (NFS3_wccstat_sz)
70 #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
71 #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
72 #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1)
73 #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3)
74 #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
75 #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
76 #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz))
77 #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
78 #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2)
79 #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13)
80 #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12)
81 #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6)
82 #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
84 #define ACL3_getaclargs_sz (NFS3_fh_sz+1)
85 #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \
86 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
87 #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \
88 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
89 #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
92 * Map file type to S_IFMT bits
96 unsigned int nfs2type;
104 { S_IFSOCK, NFSOCK },
110 * Common NFS XDR functions as inlines
112 static inline __be32 *
113 xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fh)
115 return xdr_encode_array(p, fh->data, fh->size);
118 static inline __be32 *
119 xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh)
121 if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) {
122 memcpy(fh->data, p, fh->size);
123 return p + XDR_QUADLEN(fh->size);
129 * Encode/decode time.
131 static inline __be32 *
132 xdr_encode_time3(__be32 *p, struct timespec *timep)
134 *p++ = htonl(timep->tv_sec);
135 *p++ = htonl(timep->tv_nsec);
139 static inline __be32 *
140 xdr_decode_time3(__be32 *p, struct timespec *timep)
142 timep->tv_sec = ntohl(*p++);
143 timep->tv_nsec = ntohl(*p++);
148 xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr)
150 unsigned int type, major, minor;
156 fmode = nfs_type2fmt[type].mode;
157 fattr->type = nfs_type2fmt[type].nfs2type;
158 fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode;
159 fattr->nlink = ntohl(*p++);
160 fattr->uid = ntohl(*p++);
161 fattr->gid = ntohl(*p++);
162 p = xdr_decode_hyper(p, &fattr->size);
163 p = xdr_decode_hyper(p, &fattr->du.nfs3.used);
165 /* Turn remote device info into Linux-specific dev_t */
168 fattr->rdev = MKDEV(major, minor);
169 if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor)
172 p = xdr_decode_hyper(p, &fattr->fsid.major);
173 fattr->fsid.minor = 0;
174 p = xdr_decode_hyper(p, &fattr->fileid);
175 p = xdr_decode_time3(p, &fattr->atime);
176 p = xdr_decode_time3(p, &fattr->mtime);
177 p = xdr_decode_time3(p, &fattr->ctime);
179 /* Update the mode bits */
180 fattr->valid |= (NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3);
184 static inline __be32 *
185 xdr_encode_sattr(__be32 *p, struct iattr *attr)
187 if (attr->ia_valid & ATTR_MODE) {
189 *p++ = htonl(attr->ia_mode & S_IALLUGO);
193 if (attr->ia_valid & ATTR_UID) {
195 *p++ = htonl(attr->ia_uid);
199 if (attr->ia_valid & ATTR_GID) {
201 *p++ = htonl(attr->ia_gid);
205 if (attr->ia_valid & ATTR_SIZE) {
207 p = xdr_encode_hyper(p, (__u64) attr->ia_size);
211 if (attr->ia_valid & ATTR_ATIME_SET) {
213 p = xdr_encode_time3(p, &attr->ia_atime);
214 } else if (attr->ia_valid & ATTR_ATIME) {
219 if (attr->ia_valid & ATTR_MTIME_SET) {
221 p = xdr_encode_time3(p, &attr->ia_mtime);
222 } else if (attr->ia_valid & ATTR_MTIME) {
230 static inline __be32 *
231 xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr)
233 p = xdr_decode_hyper(p, &fattr->pre_size);
234 p = xdr_decode_time3(p, &fattr->pre_mtime);
235 p = xdr_decode_time3(p, &fattr->pre_ctime);
236 fattr->valid |= NFS_ATTR_WCC;
240 static inline __be32 *
241 xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr)
244 p = xdr_decode_fattr(p, fattr);
248 static inline __be32 *
249 xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr)
252 return xdr_decode_wcc_attr(p, fattr);
257 static inline __be32 *
258 xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr)
260 p = xdr_decode_pre_op_attr(p, fattr);
261 return xdr_decode_post_op_attr(p, fattr);
265 * NFS encode functions
269 * Encode file handle argument
272 nfs3_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh)
274 p = xdr_encode_fhandle(p, fh);
275 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
280 * Encode SETATTR arguments
283 nfs3_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs3_sattrargs *args)
285 p = xdr_encode_fhandle(p, args->fh);
286 p = xdr_encode_sattr(p, args->sattr);
287 *p++ = htonl(args->guard);
289 p = xdr_encode_time3(p, &args->guardtime);
290 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
295 * Encode directory ops argument
298 nfs3_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs3_diropargs *args)
300 p = xdr_encode_fhandle(p, args->fh);
301 p = xdr_encode_array(p, args->name, args->len);
302 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
307 * Encode REMOVE argument
310 nfs3_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
312 p = xdr_encode_fhandle(p, args->fh);
313 p = xdr_encode_array(p, args->name.name, args->name.len);
314 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
319 * Encode access() argument
322 nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *args)
324 p = xdr_encode_fhandle(p, args->fh);
325 *p++ = htonl(args->access);
326 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
331 * Arguments to a READ call. Since we read data directly into the page
332 * cache, we also set up the reply iovec here so that iov[1] points
333 * exactly to the page we want to fetch.
336 nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
338 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
340 u32 count = args->count;
342 p = xdr_encode_fhandle(p, args->fh);
343 p = xdr_encode_hyper(p, args->offset);
345 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
347 /* Inline the page array */
348 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2;
349 xdr_inline_pages(&req->rq_rcv_buf, replen,
350 args->pages, args->pgbase, count);
351 req->rq_rcv_buf.flags |= XDRBUF_READ;
356 * Write arguments. Splice the buffer to be written into the iovec.
359 nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
361 struct xdr_buf *sndbuf = &req->rq_snd_buf;
362 u32 count = args->count;
364 p = xdr_encode_fhandle(p, args->fh);
365 p = xdr_encode_hyper(p, args->offset);
367 *p++ = htonl(args->stable);
369 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
371 /* Copy the page array */
372 xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
373 sndbuf->flags |= XDRBUF_WRITE;
378 * Encode CREATE arguments
381 nfs3_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs3_createargs *args)
383 p = xdr_encode_fhandle(p, args->fh);
384 p = xdr_encode_array(p, args->name, args->len);
386 *p++ = htonl(args->createmode);
387 if (args->createmode == NFS3_CREATE_EXCLUSIVE) {
388 *p++ = args->verifier[0];
389 *p++ = args->verifier[1];
391 p = xdr_encode_sattr(p, args->sattr);
393 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
398 * Encode MKDIR arguments
401 nfs3_xdr_mkdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mkdirargs *args)
403 p = xdr_encode_fhandle(p, args->fh);
404 p = xdr_encode_array(p, args->name, args->len);
405 p = xdr_encode_sattr(p, args->sattr);
406 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
411 * Encode SYMLINK arguments
414 nfs3_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_symlinkargs *args)
416 p = xdr_encode_fhandle(p, args->fromfh);
417 p = xdr_encode_array(p, args->fromname, args->fromlen);
418 p = xdr_encode_sattr(p, args->sattr);
419 *p++ = htonl(args->pathlen);
420 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
423 xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen);
428 * Encode MKNOD arguments
431 nfs3_xdr_mknodargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mknodargs *args)
433 p = xdr_encode_fhandle(p, args->fh);
434 p = xdr_encode_array(p, args->name, args->len);
435 *p++ = htonl(args->type);
436 p = xdr_encode_sattr(p, args->sattr);
437 if (args->type == NF3CHR || args->type == NF3BLK) {
438 *p++ = htonl(MAJOR(args->rdev));
439 *p++ = htonl(MINOR(args->rdev));
442 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
447 * Encode RENAME arguments
450 nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs3_renameargs *args)
452 p = xdr_encode_fhandle(p, args->fromfh);
453 p = xdr_encode_array(p, args->fromname, args->fromlen);
454 p = xdr_encode_fhandle(p, args->tofh);
455 p = xdr_encode_array(p, args->toname, args->tolen);
456 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
461 * Encode LINK arguments
464 nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args)
466 p = xdr_encode_fhandle(p, args->fromfh);
467 p = xdr_encode_fhandle(p, args->tofh);
468 p = xdr_encode_array(p, args->toname, args->tolen);
469 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
474 * Encode arguments to readdir call
477 nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args)
479 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
481 u32 count = args->count;
483 p = xdr_encode_fhandle(p, args->fh);
484 p = xdr_encode_hyper(p, args->cookie);
485 *p++ = args->verf[0];
486 *p++ = args->verf[1];
488 /* readdirplus: need dircount + buffer size.
489 * We just make sure we make dircount big enough */
490 *p++ = htonl(count >> 3);
493 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
495 /* Inline the page array */
496 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2;
497 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count);
502 * Decode the result of a readdir call.
503 * We just check for syntactical correctness.
506 nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res)
508 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
509 struct kvec *iov = rcvbuf->head;
512 u32 len, recvd, pglen;
514 __be32 *entry, *end, *kaddr;
516 status = ntohl(*p++);
517 /* Decode post_op_attrs */
518 p = xdr_decode_post_op_attr(p, res->dir_attr);
520 return nfs_stat_to_errno(status);
521 /* Decode verifier cookie */
529 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
530 if (iov->iov_len < hdrlen) {
531 dprintk("NFS: READDIR reply header overflowed:"
532 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
533 return -errno_NFSERR_IO;
534 } else if (iov->iov_len != hdrlen) {
535 dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
536 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
539 pglen = rcvbuf->page_len;
540 recvd = rcvbuf->len - hdrlen;
543 page = rcvbuf->pages;
544 kaddr = p = kmap_atomic(*page, KM_USER0);
545 end = (__be32 *)((char *)p + pglen);
548 /* Make sure the packet actually has a value_follows and EOF entry */
549 if ((entry + 1) > end)
555 p += 2; /* inode # */
556 len = ntohl(*p++); /* string length */
557 p += XDR_QUADLEN(len) + 2; /* name + cookie */
558 if (len > NFS3_MAXNAMLEN) {
559 dprintk("NFS: giant filename in readdir (len 0x%x)!\n",
578 if (len > NFS3_FHSIZE) {
579 dprintk("NFS: giant filehandle in "
580 "readdir (len 0x%x)!\n", len);
583 p += XDR_QUADLEN(len);
593 * Apparently some server sends responses that are a valid size, but
594 * contain no entries, and have value_follows==0 and EOF==0. For
595 * those, just set the EOF marker.
597 if (!nr && entry[1] == 0) {
598 dprintk("NFS: readdir reply truncated!\n");
602 kunmap_atomic(kaddr, KM_USER0);
606 * When we get a short packet there are 2 possibilities. We can
607 * return an error, or fix up the response to look like a valid
608 * response and return what we have so far. If there are no
609 * entries and the packet was short, then return -EIO. If there
610 * are valid entries in the response, return them and pretend that
611 * the call was successful, but incomplete. The caller can retry the
612 * readdir starting at the last cookie.
614 entry[0] = entry[1] = 0;
616 nr = -errno_NFSERR_IO;
619 nr = -errno_NFSERR_IO;
624 nfs3_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
626 struct nfs_entry old = *entry;
630 return ERR_PTR(-EAGAIN);
632 return ERR_PTR(-EBADCOOKIE);
635 p = xdr_decode_hyper(p, &entry->ino);
636 entry->len = ntohl(*p++);
637 entry->name = (const char *) p;
638 p += XDR_QUADLEN(entry->len);
639 entry->prev_cookie = entry->cookie;
640 p = xdr_decode_hyper(p, &entry->cookie);
643 entry->fattr->valid = 0;
644 p = xdr_decode_post_op_attr(p, entry->fattr);
645 /* In fact, a post_op_fh3: */
647 p = xdr_decode_fhandle(p, entry->fh);
648 /* Ugh -- server reply was truncated */
650 dprintk("NFS: FH truncated\n");
652 return ERR_PTR(-EAGAIN);
655 memset((u8*)(entry->fh), 0, sizeof(*entry->fh));
658 entry->eof = !p[0] && p[1];
663 * Encode COMMIT arguments
666 nfs3_xdr_commitargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
668 p = xdr_encode_fhandle(p, args->fh);
669 p = xdr_encode_hyper(p, args->offset);
670 *p++ = htonl(args->count);
671 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
675 #ifdef CONFIG_NFS_V3_ACL
677 * Encode GETACL arguments
680 nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p,
681 struct nfs3_getaclargs *args)
683 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
686 p = xdr_encode_fhandle(p, args->fh);
687 *p++ = htonl(args->mask);
688 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
690 if (args->mask & (NFS_ACL | NFS_DFACL)) {
691 /* Inline the page array */
692 replen = (RPC_REPHDRSIZE + auth->au_rslack +
693 ACL3_getaclres_sz) << 2;
694 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0,
695 NFSACL_MAXPAGES << PAGE_SHIFT);
701 * Encode SETACL arguments
704 nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p,
705 struct nfs3_setaclargs *args)
707 struct xdr_buf *buf = &req->rq_snd_buf;
711 p = xdr_encode_fhandle(p, NFS_FH(args->inode));
712 *p++ = htonl(args->mask);
713 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
716 if (args->npages != 0)
717 xdr_encode_pages(buf, args->pages, 0, args->len);
719 req->rq_slen += args->len;
721 err = nfsacl_encode(buf, base, args->inode,
722 (args->mask & NFS_ACL) ?
723 args->acl_access : NULL, 1, 0);
725 err = nfsacl_encode(buf, base + err, args->inode,
726 (args->mask & NFS_DFACL) ?
727 args->acl_default : NULL, 1,
729 return (err > 0) ? 0 : err;
731 #endif /* CONFIG_NFS_V3_ACL */
734 * NFS XDR decode functions
738 * Decode attrstat reply.
741 nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
745 if ((status = ntohl(*p++)))
746 return nfs_stat_to_errno(status);
747 xdr_decode_fattr(p, fattr);
752 * Decode status+wcc_data reply
753 * SATTR, REMOVE, RMDIR
756 nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
760 if ((status = ntohl(*p++)))
761 status = nfs_stat_to_errno(status);
762 xdr_decode_wcc_data(p, fattr);
767 nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res)
769 return nfs3_xdr_wccstat(req, p, &res->dir_attr);
773 * Decode LOOKUP reply
776 nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
780 if ((status = ntohl(*p++))) {
781 status = nfs_stat_to_errno(status);
783 if (!(p = xdr_decode_fhandle(p, res->fh)))
784 return -errno_NFSERR_IO;
785 p = xdr_decode_post_op_attr(p, res->fattr);
787 xdr_decode_post_op_attr(p, res->dir_attr);
792 * Decode ACCESS reply
795 nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res)
797 int status = ntohl(*p++);
799 p = xdr_decode_post_op_attr(p, res->fattr);
801 return nfs_stat_to_errno(status);
802 res->access = ntohl(*p++);
807 nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args)
809 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
812 p = xdr_encode_fhandle(p, args->fh);
813 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
815 /* Inline the page array */
816 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2;
817 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen);
822 * Decode READLINK reply
825 nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
827 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
828 struct kvec *iov = rcvbuf->head;
834 status = ntohl(*p++);
835 p = xdr_decode_post_op_attr(p, fattr);
838 return nfs_stat_to_errno(status);
840 /* Convert length of symlink */
842 if (len >= rcvbuf->page_len) {
843 dprintk("nfs: server returned giant symlink!\n");
844 return -ENAMETOOLONG;
847 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
848 if (iov->iov_len < hdrlen) {
849 dprintk("NFS: READLINK reply header overflowed:"
850 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
851 return -errno_NFSERR_IO;
852 } else if (iov->iov_len != hdrlen) {
853 dprintk("NFS: READLINK header is short. "
854 "iovec will be shifted.\n");
855 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
857 recvd = req->rq_rcv_buf.len - hdrlen;
859 dprintk("NFS: server cheating in readlink reply: "
860 "count %u > recvd %u\n", len, recvd);
864 /* NULL terminate the string we got */
865 kaddr = (char*)kmap_atomic(rcvbuf->pages[0], KM_USER0);
866 kaddr[len+rcvbuf->page_base] = '\0';
867 kunmap_atomic(kaddr, KM_USER0);
875 nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res)
877 struct kvec *iov = req->rq_rcv_buf.head;
879 u32 count, ocount, recvd;
882 status = ntohl(*p++);
883 p = xdr_decode_post_op_attr(p, res->fattr);
886 return nfs_stat_to_errno(status);
888 /* Decode reply count and EOF flag. NFSv3 is somewhat redundant
889 * in that it puts the count both in the res struct and in the
890 * opaque data count. */
892 res->eof = ntohl(*p++);
893 ocount = ntohl(*p++);
895 if (ocount != count) {
896 dprintk("NFS: READ count doesn't match RPC opaque count.\n");
897 return -errno_NFSERR_IO;
900 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
901 if (iov->iov_len < hdrlen) {
902 dprintk("NFS: READ reply header overflowed:"
903 "length %Zu > %Zu\n", hdrlen, iov->iov_len);
904 return -errno_NFSERR_IO;
905 } else if (iov->iov_len != hdrlen) {
906 dprintk("NFS: READ header is short. iovec will be shifted.\n");
907 xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen);
910 recvd = req->rq_rcv_buf.len - hdrlen;
912 dprintk("NFS: server cheating in read reply: "
913 "count %u > recvd %u\n", count, recvd);
918 if (count < res->count)
925 * Decode WRITE response
928 nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
932 status = ntohl(*p++);
933 p = xdr_decode_wcc_data(p, res->fattr);
936 return nfs_stat_to_errno(status);
938 res->count = ntohl(*p++);
939 res->verf->committed = (enum nfs3_stable_how)ntohl(*p++);
940 res->verf->verifier[0] = *p++;
941 res->verf->verifier[1] = *p++;
947 * Decode a CREATE response
950 nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
954 status = ntohl(*p++);
957 if (!(p = xdr_decode_fhandle(p, res->fh)))
958 return -errno_NFSERR_IO;
959 p = xdr_decode_post_op_attr(p, res->fattr);
961 memset(res->fh, 0, sizeof(*res->fh));
962 /* Do decode post_op_attr but set it to NULL */
963 p = xdr_decode_post_op_attr(p, res->fattr);
964 res->fattr->valid = 0;
967 status = nfs_stat_to_errno(status);
969 p = xdr_decode_wcc_data(p, res->dir_attr);
974 * Decode RENAME reply
977 nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs3_renameres *res)
981 if ((status = ntohl(*p++)) != 0)
982 status = nfs_stat_to_errno(status);
983 p = xdr_decode_wcc_data(p, res->fromattr);
984 p = xdr_decode_wcc_data(p, res->toattr);
992 nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res)
996 if ((status = ntohl(*p++)) != 0)
997 status = nfs_stat_to_errno(status);
998 p = xdr_decode_post_op_attr(p, res->fattr);
999 p = xdr_decode_wcc_data(p, res->dir_attr);
1004 * Decode FSSTAT reply
1007 nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res)
1011 status = ntohl(*p++);
1013 p = xdr_decode_post_op_attr(p, res->fattr);
1015 return nfs_stat_to_errno(status);
1017 p = xdr_decode_hyper(p, &res->tbytes);
1018 p = xdr_decode_hyper(p, &res->fbytes);
1019 p = xdr_decode_hyper(p, &res->abytes);
1020 p = xdr_decode_hyper(p, &res->tfiles);
1021 p = xdr_decode_hyper(p, &res->ffiles);
1022 p = xdr_decode_hyper(p, &res->afiles);
1024 /* ignore invarsec */
1029 * Decode FSINFO reply
1032 nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res)
1036 status = ntohl(*p++);
1038 p = xdr_decode_post_op_attr(p, res->fattr);
1040 return nfs_stat_to_errno(status);
1042 res->rtmax = ntohl(*p++);
1043 res->rtpref = ntohl(*p++);
1044 res->rtmult = ntohl(*p++);
1045 res->wtmax = ntohl(*p++);
1046 res->wtpref = ntohl(*p++);
1047 res->wtmult = ntohl(*p++);
1048 res->dtpref = ntohl(*p++);
1049 p = xdr_decode_hyper(p, &res->maxfilesize);
1051 /* ignore time_delta and properties */
1052 res->lease_time = 0;
1057 * Decode PATHCONF reply
1060 nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res)
1064 status = ntohl(*p++);
1066 p = xdr_decode_post_op_attr(p, res->fattr);
1068 return nfs_stat_to_errno(status);
1069 res->max_link = ntohl(*p++);
1070 res->max_namelen = ntohl(*p++);
1072 /* ignore remaining fields */
1077 * Decode COMMIT reply
1080 nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
1084 status = ntohl(*p++);
1085 p = xdr_decode_wcc_data(p, res->fattr);
1087 return nfs_stat_to_errno(status);
1089 res->verf->verifier[0] = *p++;
1090 res->verf->verifier[1] = *p++;
1094 #ifdef CONFIG_NFS_V3_ACL
1096 * Decode GETACL reply
1099 nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p,
1100 struct nfs3_getaclres *res)
1102 struct xdr_buf *buf = &req->rq_rcv_buf;
1103 int status = ntohl(*p++);
1104 struct posix_acl **acl;
1105 unsigned int *aclcnt;
1109 return nfs_stat_to_errno(status);
1110 p = xdr_decode_post_op_attr(p, res->fattr);
1111 res->mask = ntohl(*p++);
1112 if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
1114 base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base;
1116 acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL;
1117 aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL;
1118 err = nfsacl_decode(buf, base, aclcnt, acl);
1120 acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL;
1121 aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL;
1123 err = nfsacl_decode(buf, base + err, aclcnt, acl);
1124 return (err > 0) ? 0 : err;
1128 * Decode setacl reply.
1131 nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
1133 int status = ntohl(*p++);
1136 return nfs_stat_to_errno(status);
1137 xdr_decode_post_op_attr(p, fattr);
1140 #endif /* CONFIG_NFS_V3_ACL */
1142 #define PROC(proc, argtype, restype, timer) \
1143 [NFS3PROC_##proc] = { \
1144 .p_proc = NFS3PROC_##proc, \
1145 .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \
1146 .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \
1147 .p_arglen = NFS3_##argtype##_sz, \
1148 .p_replen = NFS3_##restype##_sz, \
1150 .p_statidx = NFS3PROC_##proc, \
1154 struct rpc_procinfo nfs3_procedures[] = {
1155 PROC(GETATTR, fhandle, attrstat, 1),
1156 PROC(SETATTR, sattrargs, wccstat, 0),
1157 PROC(LOOKUP, diropargs, lookupres, 2),
1158 PROC(ACCESS, accessargs, accessres, 1),
1159 PROC(READLINK, readlinkargs, readlinkres, 3),
1160 PROC(READ, readargs, readres, 3),
1161 PROC(WRITE, writeargs, writeres, 4),
1162 PROC(CREATE, createargs, createres, 0),
1163 PROC(MKDIR, mkdirargs, createres, 0),
1164 PROC(SYMLINK, symlinkargs, createres, 0),
1165 PROC(MKNOD, mknodargs, createres, 0),
1166 PROC(REMOVE, removeargs, removeres, 0),
1167 PROC(RMDIR, diropargs, wccstat, 0),
1168 PROC(RENAME, renameargs, renameres, 0),
1169 PROC(LINK, linkargs, linkres, 0),
1170 PROC(READDIR, readdirargs, readdirres, 3),
1171 PROC(READDIRPLUS, readdirargs, readdirres, 3),
1172 PROC(FSSTAT, fhandle, fsstatres, 0),
1173 PROC(FSINFO, fhandle, fsinfores, 0),
1174 PROC(PATHCONF, fhandle, pathconfres, 0),
1175 PROC(COMMIT, commitargs, commitres, 5),
1178 struct rpc_version nfs_version3 = {
1180 .nrprocs = ARRAY_SIZE(nfs3_procedures),
1181 .procs = nfs3_procedures
1184 #ifdef CONFIG_NFS_V3_ACL
1185 static struct rpc_procinfo nfs3_acl_procedures[] = {
1186 [ACLPROC3_GETACL] = {
1187 .p_proc = ACLPROC3_GETACL,
1188 .p_encode = (kxdrproc_t) nfs3_xdr_getaclargs,
1189 .p_decode = (kxdrproc_t) nfs3_xdr_getaclres,
1190 .p_arglen = ACL3_getaclargs_sz,
1191 .p_replen = ACL3_getaclres_sz,
1195 [ACLPROC3_SETACL] = {
1196 .p_proc = ACLPROC3_SETACL,
1197 .p_encode = (kxdrproc_t) nfs3_xdr_setaclargs,
1198 .p_decode = (kxdrproc_t) nfs3_xdr_setaclres,
1199 .p_arglen = ACL3_setaclargs_sz,
1200 .p_replen = ACL3_setaclres_sz,
1206 struct rpc_version nfsacl_version3 = {
1208 .nrprocs = sizeof(nfs3_acl_procedures)/
1209 sizeof(nfs3_acl_procedures[0]),
1210 .procs = nfs3_acl_procedures,
1212 #endif /* CONFIG_NFS_V3_ACL */