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+2*(2+5*3))
86 #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+2*(2+5*3))
87 #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
90 * Map file type to S_IFMT bits
94 unsigned int nfs2type;
102 { S_IFSOCK, NFSOCK },
108 * Common NFS XDR functions as inlines
110 static inline __be32 *
111 xdr_encode_fhandle(__be32 *p, const struct nfs_fh *fh)
113 return xdr_encode_array(p, fh->data, fh->size);
116 static inline __be32 *
117 xdr_decode_fhandle(__be32 *p, struct nfs_fh *fh)
119 if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) {
120 memcpy(fh->data, p, fh->size);
121 return p + XDR_QUADLEN(fh->size);
127 * Encode/decode time.
129 static inline __be32 *
130 xdr_encode_time3(__be32 *p, struct timespec *timep)
132 *p++ = htonl(timep->tv_sec);
133 *p++ = htonl(timep->tv_nsec);
137 static inline __be32 *
138 xdr_decode_time3(__be32 *p, struct timespec *timep)
140 timep->tv_sec = ntohl(*p++);
141 timep->tv_nsec = ntohl(*p++);
146 xdr_decode_fattr(__be32 *p, struct nfs_fattr *fattr)
148 unsigned int type, major, minor;
154 fmode = nfs_type2fmt[type].mode;
155 fattr->type = nfs_type2fmt[type].nfs2type;
156 fattr->mode = (ntohl(*p++) & ~S_IFMT) | fmode;
157 fattr->nlink = ntohl(*p++);
158 fattr->uid = ntohl(*p++);
159 fattr->gid = ntohl(*p++);
160 p = xdr_decode_hyper(p, &fattr->size);
161 p = xdr_decode_hyper(p, &fattr->du.nfs3.used);
163 /* Turn remote device info into Linux-specific dev_t */
166 fattr->rdev = MKDEV(major, minor);
167 if (MAJOR(fattr->rdev) != major || MINOR(fattr->rdev) != minor)
170 p = xdr_decode_hyper(p, &fattr->fsid.major);
171 fattr->fsid.minor = 0;
172 p = xdr_decode_hyper(p, &fattr->fileid);
173 p = xdr_decode_time3(p, &fattr->atime);
174 p = xdr_decode_time3(p, &fattr->mtime);
175 p = xdr_decode_time3(p, &fattr->ctime);
177 /* Update the mode bits */
178 fattr->valid |= (NFS_ATTR_FATTR | NFS_ATTR_FATTR_V3);
182 static inline __be32 *
183 xdr_encode_sattr(__be32 *p, struct iattr *attr)
185 if (attr->ia_valid & ATTR_MODE) {
187 *p++ = htonl(attr->ia_mode & S_IALLUGO);
191 if (attr->ia_valid & ATTR_UID) {
193 *p++ = htonl(attr->ia_uid);
197 if (attr->ia_valid & ATTR_GID) {
199 *p++ = htonl(attr->ia_gid);
203 if (attr->ia_valid & ATTR_SIZE) {
205 p = xdr_encode_hyper(p, (__u64) attr->ia_size);
209 if (attr->ia_valid & ATTR_ATIME_SET) {
211 p = xdr_encode_time3(p, &attr->ia_atime);
212 } else if (attr->ia_valid & ATTR_ATIME) {
217 if (attr->ia_valid & ATTR_MTIME_SET) {
219 p = xdr_encode_time3(p, &attr->ia_mtime);
220 } else if (attr->ia_valid & ATTR_MTIME) {
228 static inline __be32 *
229 xdr_decode_wcc_attr(__be32 *p, struct nfs_fattr *fattr)
231 p = xdr_decode_hyper(p, &fattr->pre_size);
232 p = xdr_decode_time3(p, &fattr->pre_mtime);
233 p = xdr_decode_time3(p, &fattr->pre_ctime);
234 fattr->valid |= NFS_ATTR_WCC;
238 static inline __be32 *
239 xdr_decode_post_op_attr(__be32 *p, struct nfs_fattr *fattr)
242 p = xdr_decode_fattr(p, fattr);
246 static inline __be32 *
247 xdr_decode_pre_op_attr(__be32 *p, struct nfs_fattr *fattr)
250 return xdr_decode_wcc_attr(p, fattr);
255 static inline __be32 *
256 xdr_decode_wcc_data(__be32 *p, struct nfs_fattr *fattr)
258 p = xdr_decode_pre_op_attr(p, fattr);
259 return xdr_decode_post_op_attr(p, fattr);
263 * NFS encode functions
267 * Encode file handle argument
270 nfs3_xdr_fhandle(struct rpc_rqst *req, __be32 *p, struct nfs_fh *fh)
272 p = xdr_encode_fhandle(p, fh);
273 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
278 * Encode SETATTR arguments
281 nfs3_xdr_sattrargs(struct rpc_rqst *req, __be32 *p, struct nfs3_sattrargs *args)
283 p = xdr_encode_fhandle(p, args->fh);
284 p = xdr_encode_sattr(p, args->sattr);
285 *p++ = htonl(args->guard);
287 p = xdr_encode_time3(p, &args->guardtime);
288 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
293 * Encode directory ops argument
296 nfs3_xdr_diropargs(struct rpc_rqst *req, __be32 *p, struct nfs3_diropargs *args)
298 p = xdr_encode_fhandle(p, args->fh);
299 p = xdr_encode_array(p, args->name, args->len);
300 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
305 * Encode REMOVE argument
308 nfs3_xdr_removeargs(struct rpc_rqst *req, __be32 *p, const struct nfs_removeargs *args)
310 p = xdr_encode_fhandle(p, args->fh);
311 p = xdr_encode_array(p, args->name.name, args->name.len);
312 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
317 * Encode access() argument
320 nfs3_xdr_accessargs(struct rpc_rqst *req, __be32 *p, struct nfs3_accessargs *args)
322 p = xdr_encode_fhandle(p, args->fh);
323 *p++ = htonl(args->access);
324 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
329 * Arguments to a READ call. Since we read data directly into the page
330 * cache, we also set up the reply iovec here so that iov[1] points
331 * exactly to the page we want to fetch.
334 nfs3_xdr_readargs(struct rpc_rqst *req, __be32 *p, struct nfs_readargs *args)
336 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
338 u32 count = args->count;
340 p = xdr_encode_fhandle(p, args->fh);
341 p = xdr_encode_hyper(p, args->offset);
343 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
345 /* Inline the page array */
346 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readres_sz) << 2;
347 xdr_inline_pages(&req->rq_rcv_buf, replen,
348 args->pages, args->pgbase, count);
349 req->rq_rcv_buf.flags |= XDRBUF_READ;
354 * Write arguments. Splice the buffer to be written into the iovec.
357 nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
359 struct xdr_buf *sndbuf = &req->rq_snd_buf;
360 u32 count = args->count;
362 p = xdr_encode_fhandle(p, args->fh);
363 p = xdr_encode_hyper(p, args->offset);
365 *p++ = htonl(args->stable);
367 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
369 /* Copy the page array */
370 xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
371 sndbuf->flags |= XDRBUF_WRITE;
376 * Encode CREATE arguments
379 nfs3_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs3_createargs *args)
381 p = xdr_encode_fhandle(p, args->fh);
382 p = xdr_encode_array(p, args->name, args->len);
384 *p++ = htonl(args->createmode);
385 if (args->createmode == NFS3_CREATE_EXCLUSIVE) {
386 *p++ = args->verifier[0];
387 *p++ = args->verifier[1];
389 p = xdr_encode_sattr(p, args->sattr);
391 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
396 * Encode MKDIR arguments
399 nfs3_xdr_mkdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mkdirargs *args)
401 p = xdr_encode_fhandle(p, args->fh);
402 p = xdr_encode_array(p, args->name, args->len);
403 p = xdr_encode_sattr(p, args->sattr);
404 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
409 * Encode SYMLINK arguments
412 nfs3_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_symlinkargs *args)
414 p = xdr_encode_fhandle(p, args->fromfh);
415 p = xdr_encode_array(p, args->fromname, args->fromlen);
416 p = xdr_encode_sattr(p, args->sattr);
417 *p++ = htonl(args->pathlen);
418 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
421 xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen);
426 * Encode MKNOD arguments
429 nfs3_xdr_mknodargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mknodargs *args)
431 p = xdr_encode_fhandle(p, args->fh);
432 p = xdr_encode_array(p, args->name, args->len);
433 *p++ = htonl(args->type);
434 p = xdr_encode_sattr(p, args->sattr);
435 if (args->type == NF3CHR || args->type == NF3BLK) {
436 *p++ = htonl(MAJOR(args->rdev));
437 *p++ = htonl(MINOR(args->rdev));
440 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
445 * Encode RENAME arguments
448 nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs3_renameargs *args)
450 p = xdr_encode_fhandle(p, args->fromfh);
451 p = xdr_encode_array(p, args->fromname, args->fromlen);
452 p = xdr_encode_fhandle(p, args->tofh);
453 p = xdr_encode_array(p, args->toname, args->tolen);
454 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
459 * Encode LINK arguments
462 nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args)
464 p = xdr_encode_fhandle(p, args->fromfh);
465 p = xdr_encode_fhandle(p, args->tofh);
466 p = xdr_encode_array(p, args->toname, args->tolen);
467 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
472 * Encode arguments to readdir call
475 nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args)
477 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
479 u32 count = args->count;
481 p = xdr_encode_fhandle(p, args->fh);
482 p = xdr_encode_hyper(p, args->cookie);
483 *p++ = args->verf[0];
484 *p++ = args->verf[1];
486 /* readdirplus: need dircount + buffer size.
487 * We just make sure we make dircount big enough */
488 *p++ = htonl(count >> 3);
491 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
493 /* Inline the page array */
494 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2;
495 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count);
500 * Decode the result of a readdir call.
501 * We just check for syntactical correctness.
504 nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res)
506 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
507 struct kvec *iov = rcvbuf->head;
511 unsigned int len, pglen;
512 __be32 *entry, *end, *kaddr;
514 status = ntohl(*p++);
515 /* Decode post_op_attrs */
516 p = xdr_decode_post_op_attr(p, res->dir_attr);
518 return -nfs_stat_to_errno(status);
519 /* Decode verifier cookie */
527 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
528 if (iov->iov_len < hdrlen) {
529 dprintk("NFS: READDIR reply header overflowed:"
530 "length %d > %Zu\n", hdrlen, iov->iov_len);
531 return -errno_NFSERR_IO;
532 } else if (iov->iov_len != hdrlen) {
533 dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
534 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
537 pglen = rcvbuf->page_len;
538 recvd = rcvbuf->len - hdrlen;
541 page = rcvbuf->pages;
542 kaddr = p = kmap_atomic(*page, KM_USER0);
543 end = (__be32 *)((char *)p + pglen);
545 for (nr = 0; *p++; nr++) {
548 p += 2; /* inode # */
549 len = ntohl(*p++); /* string length */
550 p += XDR_QUADLEN(len) + 2; /* name + cookie */
551 if (len > NFS3_MAXNAMLEN) {
552 dprintk("NFS: giant filename in readdir (len %x)!\n",
571 if (len > NFS3_FHSIZE) {
572 dprintk("NFS: giant filehandle in "
573 "readdir (len %x)!\n", len);
576 p += XDR_QUADLEN(len);
584 if (!nr && (entry[0] != 0 || entry[1] == 0))
587 kunmap_atomic(kaddr, KM_USER0);
590 entry[0] = entry[1] = 0;
591 /* truncate listing ? */
593 dprintk("NFS: readdir reply truncated!\n");
598 nr = -errno_NFSERR_IO;
603 nfs3_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
605 struct nfs_entry old = *entry;
609 return ERR_PTR(-EAGAIN);
611 return ERR_PTR(-EBADCOOKIE);
614 p = xdr_decode_hyper(p, &entry->ino);
615 entry->len = ntohl(*p++);
616 entry->name = (const char *) p;
617 p += XDR_QUADLEN(entry->len);
618 entry->prev_cookie = entry->cookie;
619 p = xdr_decode_hyper(p, &entry->cookie);
622 entry->fattr->valid = 0;
623 p = xdr_decode_post_op_attr(p, entry->fattr);
624 /* In fact, a post_op_fh3: */
626 p = xdr_decode_fhandle(p, entry->fh);
627 /* Ugh -- server reply was truncated */
629 dprintk("NFS: FH truncated\n");
631 return ERR_PTR(-EAGAIN);
634 memset((u8*)(entry->fh), 0, sizeof(*entry->fh));
637 entry->eof = !p[0] && p[1];
642 * Encode COMMIT arguments
645 nfs3_xdr_commitargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
647 p = xdr_encode_fhandle(p, args->fh);
648 p = xdr_encode_hyper(p, args->offset);
649 *p++ = htonl(args->count);
650 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
654 #ifdef CONFIG_NFS_V3_ACL
656 * Encode GETACL arguments
659 nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p,
660 struct nfs3_getaclargs *args)
662 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
665 p = xdr_encode_fhandle(p, args->fh);
666 *p++ = htonl(args->mask);
667 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
669 if (args->mask & (NFS_ACL | NFS_DFACL)) {
670 /* Inline the page array */
671 replen = (RPC_REPHDRSIZE + auth->au_rslack +
672 ACL3_getaclres_sz) << 2;
673 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0,
674 NFSACL_MAXPAGES << PAGE_SHIFT);
680 * Encode SETACL arguments
683 nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p,
684 struct nfs3_setaclargs *args)
686 struct xdr_buf *buf = &req->rq_snd_buf;
687 unsigned int base, len_in_head, len = nfsacl_size(
688 (args->mask & NFS_ACL) ? args->acl_access : NULL,
689 (args->mask & NFS_DFACL) ? args->acl_default : NULL);
692 p = xdr_encode_fhandle(p, NFS_FH(args->inode));
693 *p++ = htonl(args->mask);
694 base = (char *)p - (char *)buf->head->iov_base;
695 /* put as much of the acls into head as possible. */
696 len_in_head = min_t(unsigned int, buf->head->iov_len - base, len);
698 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p + (len_in_head >> 2));
700 for (count = 0; (count << PAGE_SHIFT) < len; count++) {
701 args->pages[count] = alloc_page(GFP_KERNEL);
702 if (!args->pages[count]) {
704 __free_page(args->pages[--count]);
708 xdr_encode_pages(buf, args->pages, 0, len);
710 err = nfsacl_encode(buf, base, args->inode,
711 (args->mask & NFS_ACL) ?
712 args->acl_access : NULL, 1, 0);
714 err = nfsacl_encode(buf, base + err, args->inode,
715 (args->mask & NFS_DFACL) ?
716 args->acl_default : NULL, 1,
718 return (err > 0) ? 0 : err;
720 #endif /* CONFIG_NFS_V3_ACL */
723 * NFS XDR decode functions
727 * Decode attrstat reply.
730 nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
734 if ((status = ntohl(*p++)))
735 return -nfs_stat_to_errno(status);
736 xdr_decode_fattr(p, fattr);
741 * Decode status+wcc_data reply
742 * SATTR, REMOVE, RMDIR
745 nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
749 if ((status = ntohl(*p++)))
750 status = -nfs_stat_to_errno(status);
751 xdr_decode_wcc_data(p, fattr);
756 nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res)
758 return nfs3_xdr_wccstat(req, p, &res->dir_attr);
762 * Decode LOOKUP reply
765 nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
769 if ((status = ntohl(*p++))) {
770 status = -nfs_stat_to_errno(status);
772 if (!(p = xdr_decode_fhandle(p, res->fh)))
773 return -errno_NFSERR_IO;
774 p = xdr_decode_post_op_attr(p, res->fattr);
776 xdr_decode_post_op_attr(p, res->dir_attr);
781 * Decode ACCESS reply
784 nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res)
786 int status = ntohl(*p++);
788 p = xdr_decode_post_op_attr(p, res->fattr);
790 return -nfs_stat_to_errno(status);
791 res->access = ntohl(*p++);
796 nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args)
798 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
801 p = xdr_encode_fhandle(p, args->fh);
802 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
804 /* Inline the page array */
805 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2;
806 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen);
811 * Decode READLINK reply
814 nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
816 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
817 struct kvec *iov = rcvbuf->head;
818 int hdrlen, len, recvd;
822 status = ntohl(*p++);
823 p = xdr_decode_post_op_attr(p, fattr);
826 return -nfs_stat_to_errno(status);
828 /* Convert length of symlink */
830 if (len >= rcvbuf->page_len || len <= 0) {
831 dprintk("nfs: server returned giant symlink!\n");
832 return -ENAMETOOLONG;
835 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
836 if (iov->iov_len < hdrlen) {
837 dprintk("NFS: READLINK reply header overflowed:"
838 "length %d > %Zu\n", hdrlen, iov->iov_len);
839 return -errno_NFSERR_IO;
840 } else if (iov->iov_len != hdrlen) {
841 dprintk("NFS: READLINK header is short. "
842 "iovec will be shifted.\n");
843 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
845 recvd = req->rq_rcv_buf.len - hdrlen;
847 dprintk("NFS: server cheating in readlink reply: "
848 "count %u > recvd %u\n", len, recvd);
852 /* NULL terminate the string we got */
853 kaddr = (char*)kmap_atomic(rcvbuf->pages[0], KM_USER0);
854 kaddr[len+rcvbuf->page_base] = '\0';
855 kunmap_atomic(kaddr, KM_USER0);
863 nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res)
865 struct kvec *iov = req->rq_rcv_buf.head;
866 int status, count, ocount, recvd, hdrlen;
868 status = ntohl(*p++);
869 p = xdr_decode_post_op_attr(p, res->fattr);
872 return -nfs_stat_to_errno(status);
874 /* Decode reply could and EOF flag. NFSv3 is somewhat redundant
875 * in that it puts the count both in the res struct and in the
876 * opaque data count. */
878 res->eof = ntohl(*p++);
879 ocount = ntohl(*p++);
881 if (ocount != count) {
882 dprintk("NFS: READ count doesn't match RPC opaque count.\n");
883 return -errno_NFSERR_IO;
886 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
887 if (iov->iov_len < hdrlen) {
888 dprintk("NFS: READ reply header overflowed:"
889 "length %d > %Zu\n", hdrlen, iov->iov_len);
890 return -errno_NFSERR_IO;
891 } else if (iov->iov_len != hdrlen) {
892 dprintk("NFS: READ header is short. iovec will be shifted.\n");
893 xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen);
896 recvd = req->rq_rcv_buf.len - hdrlen;
898 dprintk("NFS: server cheating in read reply: "
899 "count %d > recvd %d\n", count, recvd);
904 if (count < res->count)
911 * Decode WRITE response
914 nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
918 status = ntohl(*p++);
919 p = xdr_decode_wcc_data(p, res->fattr);
922 return -nfs_stat_to_errno(status);
924 res->count = ntohl(*p++);
925 res->verf->committed = (enum nfs3_stable_how)ntohl(*p++);
926 res->verf->verifier[0] = *p++;
927 res->verf->verifier[1] = *p++;
933 * Decode a CREATE response
936 nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
940 status = ntohl(*p++);
943 if (!(p = xdr_decode_fhandle(p, res->fh)))
944 return -errno_NFSERR_IO;
945 p = xdr_decode_post_op_attr(p, res->fattr);
947 memset(res->fh, 0, sizeof(*res->fh));
948 /* Do decode post_op_attr but set it to NULL */
949 p = xdr_decode_post_op_attr(p, res->fattr);
950 res->fattr->valid = 0;
953 status = -nfs_stat_to_errno(status);
955 p = xdr_decode_wcc_data(p, res->dir_attr);
960 * Decode RENAME reply
963 nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs3_renameres *res)
967 if ((status = ntohl(*p++)) != 0)
968 status = -nfs_stat_to_errno(status);
969 p = xdr_decode_wcc_data(p, res->fromattr);
970 p = xdr_decode_wcc_data(p, res->toattr);
978 nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res)
982 if ((status = ntohl(*p++)) != 0)
983 status = -nfs_stat_to_errno(status);
984 p = xdr_decode_post_op_attr(p, res->fattr);
985 p = xdr_decode_wcc_data(p, res->dir_attr);
990 * Decode FSSTAT reply
993 nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res)
997 status = ntohl(*p++);
999 p = xdr_decode_post_op_attr(p, res->fattr);
1001 return -nfs_stat_to_errno(status);
1003 p = xdr_decode_hyper(p, &res->tbytes);
1004 p = xdr_decode_hyper(p, &res->fbytes);
1005 p = xdr_decode_hyper(p, &res->abytes);
1006 p = xdr_decode_hyper(p, &res->tfiles);
1007 p = xdr_decode_hyper(p, &res->ffiles);
1008 p = xdr_decode_hyper(p, &res->afiles);
1010 /* ignore invarsec */
1015 * Decode FSINFO reply
1018 nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res)
1022 status = ntohl(*p++);
1024 p = xdr_decode_post_op_attr(p, res->fattr);
1026 return -nfs_stat_to_errno(status);
1028 res->rtmax = ntohl(*p++);
1029 res->rtpref = ntohl(*p++);
1030 res->rtmult = ntohl(*p++);
1031 res->wtmax = ntohl(*p++);
1032 res->wtpref = ntohl(*p++);
1033 res->wtmult = ntohl(*p++);
1034 res->dtpref = ntohl(*p++);
1035 p = xdr_decode_hyper(p, &res->maxfilesize);
1037 /* ignore time_delta and properties */
1038 res->lease_time = 0;
1043 * Decode PATHCONF reply
1046 nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res)
1050 status = ntohl(*p++);
1052 p = xdr_decode_post_op_attr(p, res->fattr);
1054 return -nfs_stat_to_errno(status);
1055 res->max_link = ntohl(*p++);
1056 res->max_namelen = ntohl(*p++);
1058 /* ignore remaining fields */
1063 * Decode COMMIT reply
1066 nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
1070 status = ntohl(*p++);
1071 p = xdr_decode_wcc_data(p, res->fattr);
1073 return -nfs_stat_to_errno(status);
1075 res->verf->verifier[0] = *p++;
1076 res->verf->verifier[1] = *p++;
1080 #ifdef CONFIG_NFS_V3_ACL
1082 * Decode GETACL reply
1085 nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p,
1086 struct nfs3_getaclres *res)
1088 struct xdr_buf *buf = &req->rq_rcv_buf;
1089 int status = ntohl(*p++);
1090 struct posix_acl **acl;
1091 unsigned int *aclcnt;
1095 return -nfs_stat_to_errno(status);
1096 p = xdr_decode_post_op_attr(p, res->fattr);
1097 res->mask = ntohl(*p++);
1098 if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
1100 base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base;
1102 acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL;
1103 aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL;
1104 err = nfsacl_decode(buf, base, aclcnt, acl);
1106 acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL;
1107 aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL;
1109 err = nfsacl_decode(buf, base + err, aclcnt, acl);
1110 return (err > 0) ? 0 : err;
1114 * Decode setacl reply.
1117 nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
1119 int status = ntohl(*p++);
1122 return -nfs_stat_to_errno(status);
1123 xdr_decode_post_op_attr(p, fattr);
1126 #endif /* CONFIG_NFS_V3_ACL */
1128 #define PROC(proc, argtype, restype, timer) \
1129 [NFS3PROC_##proc] = { \
1130 .p_proc = NFS3PROC_##proc, \
1131 .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \
1132 .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \
1133 .p_arglen = NFS3_##argtype##_sz, \
1134 .p_replen = NFS3_##restype##_sz, \
1136 .p_statidx = NFS3PROC_##proc, \
1140 struct rpc_procinfo nfs3_procedures[] = {
1141 PROC(GETATTR, fhandle, attrstat, 1),
1142 PROC(SETATTR, sattrargs, wccstat, 0),
1143 PROC(LOOKUP, diropargs, lookupres, 2),
1144 PROC(ACCESS, accessargs, accessres, 1),
1145 PROC(READLINK, readlinkargs, readlinkres, 3),
1146 PROC(READ, readargs, readres, 3),
1147 PROC(WRITE, writeargs, writeres, 4),
1148 PROC(CREATE, createargs, createres, 0),
1149 PROC(MKDIR, mkdirargs, createres, 0),
1150 PROC(SYMLINK, symlinkargs, createres, 0),
1151 PROC(MKNOD, mknodargs, createres, 0),
1152 PROC(REMOVE, removeargs, removeres, 0),
1153 PROC(RMDIR, diropargs, wccstat, 0),
1154 PROC(RENAME, renameargs, renameres, 0),
1155 PROC(LINK, linkargs, linkres, 0),
1156 PROC(READDIR, readdirargs, readdirres, 3),
1157 PROC(READDIRPLUS, readdirargs, readdirres, 3),
1158 PROC(FSSTAT, fhandle, fsstatres, 0),
1159 PROC(FSINFO, fhandle, fsinfores, 0),
1160 PROC(PATHCONF, fhandle, pathconfres, 0),
1161 PROC(COMMIT, commitargs, commitres, 5),
1164 struct rpc_version nfs_version3 = {
1166 .nrprocs = ARRAY_SIZE(nfs3_procedures),
1167 .procs = nfs3_procedures
1170 #ifdef CONFIG_NFS_V3_ACL
1171 static struct rpc_procinfo nfs3_acl_procedures[] = {
1172 [ACLPROC3_GETACL] = {
1173 .p_proc = ACLPROC3_GETACL,
1174 .p_encode = (kxdrproc_t) nfs3_xdr_getaclargs,
1175 .p_decode = (kxdrproc_t) nfs3_xdr_getaclres,
1176 .p_arglen = ACL3_getaclargs_sz,
1177 .p_replen = ACL3_getaclres_sz,
1181 [ACLPROC3_SETACL] = {
1182 .p_proc = ACLPROC3_SETACL,
1183 .p_encode = (kxdrproc_t) nfs3_xdr_setaclargs,
1184 .p_decode = (kxdrproc_t) nfs3_xdr_setaclres,
1185 .p_arglen = ACL3_setaclargs_sz,
1186 .p_replen = ACL3_setaclres_sz,
1192 struct rpc_version nfsacl_version3 = {
1194 .nrprocs = sizeof(nfs3_acl_procedures)/
1195 sizeof(nfs3_acl_procedures[0]),
1196 .procs = nfs3_acl_procedures,
1198 #endif /* CONFIG_NFS_V3_ACL */