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);
353 * Write arguments. Splice the buffer to be written into the iovec.
356 nfs3_xdr_writeargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
358 struct xdr_buf *sndbuf = &req->rq_snd_buf;
359 u32 count = args->count;
361 p = xdr_encode_fhandle(p, args->fh);
362 p = xdr_encode_hyper(p, args->offset);
364 *p++ = htonl(args->stable);
366 sndbuf->len = xdr_adjust_iovec(sndbuf->head, p);
368 /* Copy the page array */
369 xdr_encode_pages(sndbuf, args->pages, args->pgbase, count);
374 * Encode CREATE arguments
377 nfs3_xdr_createargs(struct rpc_rqst *req, __be32 *p, struct nfs3_createargs *args)
379 p = xdr_encode_fhandle(p, args->fh);
380 p = xdr_encode_array(p, args->name, args->len);
382 *p++ = htonl(args->createmode);
383 if (args->createmode == NFS3_CREATE_EXCLUSIVE) {
384 *p++ = args->verifier[0];
385 *p++ = args->verifier[1];
387 p = xdr_encode_sattr(p, args->sattr);
389 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
394 * Encode MKDIR arguments
397 nfs3_xdr_mkdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mkdirargs *args)
399 p = xdr_encode_fhandle(p, args->fh);
400 p = xdr_encode_array(p, args->name, args->len);
401 p = xdr_encode_sattr(p, args->sattr);
402 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
407 * Encode SYMLINK arguments
410 nfs3_xdr_symlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_symlinkargs *args)
412 p = xdr_encode_fhandle(p, args->fromfh);
413 p = xdr_encode_array(p, args->fromname, args->fromlen);
414 p = xdr_encode_sattr(p, args->sattr);
415 *p++ = htonl(args->pathlen);
416 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
419 xdr_encode_pages(&req->rq_snd_buf, args->pages, 0, args->pathlen);
424 * Encode MKNOD arguments
427 nfs3_xdr_mknodargs(struct rpc_rqst *req, __be32 *p, struct nfs3_mknodargs *args)
429 p = xdr_encode_fhandle(p, args->fh);
430 p = xdr_encode_array(p, args->name, args->len);
431 *p++ = htonl(args->type);
432 p = xdr_encode_sattr(p, args->sattr);
433 if (args->type == NF3CHR || args->type == NF3BLK) {
434 *p++ = htonl(MAJOR(args->rdev));
435 *p++ = htonl(MINOR(args->rdev));
438 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
443 * Encode RENAME arguments
446 nfs3_xdr_renameargs(struct rpc_rqst *req, __be32 *p, struct nfs3_renameargs *args)
448 p = xdr_encode_fhandle(p, args->fromfh);
449 p = xdr_encode_array(p, args->fromname, args->fromlen);
450 p = xdr_encode_fhandle(p, args->tofh);
451 p = xdr_encode_array(p, args->toname, args->tolen);
452 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
457 * Encode LINK arguments
460 nfs3_xdr_linkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_linkargs *args)
462 p = xdr_encode_fhandle(p, args->fromfh);
463 p = xdr_encode_fhandle(p, args->tofh);
464 p = xdr_encode_array(p, args->toname, args->tolen);
465 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
470 * Encode arguments to readdir call
473 nfs3_xdr_readdirargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirargs *args)
475 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
477 u32 count = args->count;
479 p = xdr_encode_fhandle(p, args->fh);
480 p = xdr_encode_hyper(p, args->cookie);
481 *p++ = args->verf[0];
482 *p++ = args->verf[1];
484 /* readdirplus: need dircount + buffer size.
485 * We just make sure we make dircount big enough */
486 *p++ = htonl(count >> 3);
489 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
491 /* Inline the page array */
492 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readdirres_sz) << 2;
493 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0, count);
498 * Decode the result of a readdir call.
499 * We just check for syntactical correctness.
502 nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res)
504 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
505 struct kvec *iov = rcvbuf->head;
509 unsigned int len, pglen;
510 __be32 *entry, *end, *kaddr;
512 status = ntohl(*p++);
513 /* Decode post_op_attrs */
514 p = xdr_decode_post_op_attr(p, res->dir_attr);
516 return -nfs_stat_to_errno(status);
517 /* Decode verifier cookie */
525 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
526 if (iov->iov_len < hdrlen) {
527 printk(KERN_WARNING "NFS: READDIR reply header overflowed:"
528 "length %d > %Zu\n", hdrlen, iov->iov_len);
529 return -errno_NFSERR_IO;
530 } else if (iov->iov_len != hdrlen) {
531 dprintk("NFS: READDIR header is short. iovec will be shifted.\n");
532 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
535 pglen = rcvbuf->page_len;
536 recvd = rcvbuf->len - hdrlen;
539 page = rcvbuf->pages;
540 kaddr = p = kmap_atomic(*page, KM_USER0);
541 end = (__be32 *)((char *)p + pglen);
543 for (nr = 0; *p++; nr++) {
546 p += 2; /* inode # */
547 len = ntohl(*p++); /* string length */
548 p += XDR_QUADLEN(len) + 2; /* name + cookie */
549 if (len > NFS3_MAXNAMLEN) {
550 printk(KERN_WARNING "NFS: giant filename in readdir (len %x)!\n",
569 if (len > NFS3_FHSIZE) {
570 printk(KERN_WARNING "NFS: giant filehandle in "
571 "readdir (len %x)!\n", len);
574 p += XDR_QUADLEN(len);
582 if (!nr && (entry[0] != 0 || entry[1] == 0))
585 kunmap_atomic(kaddr, KM_USER0);
588 entry[0] = entry[1] = 0;
589 /* truncate listing ? */
591 printk(KERN_NOTICE "NFS: readdir reply truncated!\n");
596 nr = -errno_NFSERR_IO;
601 nfs3_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus)
603 struct nfs_entry old = *entry;
607 return ERR_PTR(-EAGAIN);
609 return ERR_PTR(-EBADCOOKIE);
612 p = xdr_decode_hyper(p, &entry->ino);
613 entry->len = ntohl(*p++);
614 entry->name = (const char *) p;
615 p += XDR_QUADLEN(entry->len);
616 entry->prev_cookie = entry->cookie;
617 p = xdr_decode_hyper(p, &entry->cookie);
620 entry->fattr->valid = 0;
621 p = xdr_decode_post_op_attr(p, entry->fattr);
622 /* In fact, a post_op_fh3: */
624 p = xdr_decode_fhandle(p, entry->fh);
625 /* Ugh -- server reply was truncated */
627 dprintk("NFS: FH truncated\n");
629 return ERR_PTR(-EAGAIN);
632 memset((u8*)(entry->fh), 0, sizeof(*entry->fh));
635 entry->eof = !p[0] && p[1];
640 * Encode COMMIT arguments
643 nfs3_xdr_commitargs(struct rpc_rqst *req, __be32 *p, struct nfs_writeargs *args)
645 p = xdr_encode_fhandle(p, args->fh);
646 p = xdr_encode_hyper(p, args->offset);
647 *p++ = htonl(args->count);
648 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
652 #ifdef CONFIG_NFS_V3_ACL
654 * Encode GETACL arguments
657 nfs3_xdr_getaclargs(struct rpc_rqst *req, __be32 *p,
658 struct nfs3_getaclargs *args)
660 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
663 p = xdr_encode_fhandle(p, args->fh);
664 *p++ = htonl(args->mask);
665 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
667 if (args->mask & (NFS_ACL | NFS_DFACL)) {
668 /* Inline the page array */
669 replen = (RPC_REPHDRSIZE + auth->au_rslack +
670 ACL3_getaclres_sz) << 2;
671 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, 0,
672 NFSACL_MAXPAGES << PAGE_SHIFT);
678 * Encode SETACL arguments
681 nfs3_xdr_setaclargs(struct rpc_rqst *req, __be32 *p,
682 struct nfs3_setaclargs *args)
684 struct xdr_buf *buf = &req->rq_snd_buf;
685 unsigned int base, len_in_head, len = nfsacl_size(
686 (args->mask & NFS_ACL) ? args->acl_access : NULL,
687 (args->mask & NFS_DFACL) ? args->acl_default : NULL);
690 p = xdr_encode_fhandle(p, NFS_FH(args->inode));
691 *p++ = htonl(args->mask);
692 base = (char *)p - (char *)buf->head->iov_base;
693 /* put as much of the acls into head as possible. */
694 len_in_head = min_t(unsigned int, buf->head->iov_len - base, len);
696 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p + (len_in_head >> 2));
698 for (count = 0; (count << PAGE_SHIFT) < len; count++) {
699 args->pages[count] = alloc_page(GFP_KERNEL);
700 if (!args->pages[count]) {
702 __free_page(args->pages[--count]);
706 xdr_encode_pages(buf, args->pages, 0, len);
708 err = nfsacl_encode(buf, base, args->inode,
709 (args->mask & NFS_ACL) ?
710 args->acl_access : NULL, 1, 0);
712 err = nfsacl_encode(buf, base + err, args->inode,
713 (args->mask & NFS_DFACL) ?
714 args->acl_default : NULL, 1,
716 return (err > 0) ? 0 : err;
718 #endif /* CONFIG_NFS_V3_ACL */
721 * NFS XDR decode functions
725 * Decode attrstat reply.
728 nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
732 if ((status = ntohl(*p++)))
733 return -nfs_stat_to_errno(status);
734 xdr_decode_fattr(p, fattr);
739 * Decode status+wcc_data reply
740 * SATTR, REMOVE, RMDIR
743 nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
747 if ((status = ntohl(*p++)))
748 status = -nfs_stat_to_errno(status);
749 xdr_decode_wcc_data(p, fattr);
754 nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res)
756 return nfs3_xdr_wccstat(req, p, &res->dir_attr);
760 * Decode LOOKUP reply
763 nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
767 if ((status = ntohl(*p++))) {
768 status = -nfs_stat_to_errno(status);
770 if (!(p = xdr_decode_fhandle(p, res->fh)))
771 return -errno_NFSERR_IO;
772 p = xdr_decode_post_op_attr(p, res->fattr);
774 xdr_decode_post_op_attr(p, res->dir_attr);
779 * Decode ACCESS reply
782 nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res)
784 int status = ntohl(*p++);
786 p = xdr_decode_post_op_attr(p, res->fattr);
788 return -nfs_stat_to_errno(status);
789 res->access = ntohl(*p++);
794 nfs3_xdr_readlinkargs(struct rpc_rqst *req, __be32 *p, struct nfs3_readlinkargs *args)
796 struct rpc_auth *auth = req->rq_task->tk_msg.rpc_cred->cr_auth;
799 p = xdr_encode_fhandle(p, args->fh);
800 req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
802 /* Inline the page array */
803 replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS3_readlinkres_sz) << 2;
804 xdr_inline_pages(&req->rq_rcv_buf, replen, args->pages, args->pgbase, args->pglen);
809 * Decode READLINK reply
812 nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
814 struct xdr_buf *rcvbuf = &req->rq_rcv_buf;
815 struct kvec *iov = rcvbuf->head;
816 int hdrlen, len, recvd;
820 status = ntohl(*p++);
821 p = xdr_decode_post_op_attr(p, fattr);
824 return -nfs_stat_to_errno(status);
826 /* Convert length of symlink */
828 if (len >= rcvbuf->page_len || len <= 0) {
829 dprintk(KERN_WARNING "nfs: server returned giant symlink!\n");
830 return -ENAMETOOLONG;
833 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
834 if (iov->iov_len < hdrlen) {
835 printk(KERN_WARNING "NFS: READLINK reply header overflowed:"
836 "length %d > %Zu\n", hdrlen, iov->iov_len);
837 return -errno_NFSERR_IO;
838 } else if (iov->iov_len != hdrlen) {
839 dprintk("NFS: READLINK header is short. iovec will be shifted.\n");
840 xdr_shift_buf(rcvbuf, iov->iov_len - hdrlen);
842 recvd = req->rq_rcv_buf.len - hdrlen;
844 printk(KERN_WARNING "NFS: server cheating in readlink reply: "
845 "count %u > recvd %u\n", len, recvd);
849 /* NULL terminate the string we got */
850 kaddr = (char*)kmap_atomic(rcvbuf->pages[0], KM_USER0);
851 kaddr[len+rcvbuf->page_base] = '\0';
852 kunmap_atomic(kaddr, KM_USER0);
860 nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res)
862 struct kvec *iov = req->rq_rcv_buf.head;
863 int status, count, ocount, recvd, hdrlen;
865 status = ntohl(*p++);
866 p = xdr_decode_post_op_attr(p, res->fattr);
869 return -nfs_stat_to_errno(status);
871 /* Decode reply could and EOF flag. NFSv3 is somewhat redundant
872 * in that it puts the count both in the res struct and in the
873 * opaque data count. */
875 res->eof = ntohl(*p++);
876 ocount = ntohl(*p++);
878 if (ocount != count) {
879 printk(KERN_WARNING "NFS: READ count doesn't match RPC opaque count.\n");
880 return -errno_NFSERR_IO;
883 hdrlen = (u8 *) p - (u8 *) iov->iov_base;
884 if (iov->iov_len < hdrlen) {
885 printk(KERN_WARNING "NFS: READ reply header overflowed:"
886 "length %d > %Zu\n", hdrlen, iov->iov_len);
887 return -errno_NFSERR_IO;
888 } else if (iov->iov_len != hdrlen) {
889 dprintk("NFS: READ header is short. iovec will be shifted.\n");
890 xdr_shift_buf(&req->rq_rcv_buf, iov->iov_len - hdrlen);
893 recvd = req->rq_rcv_buf.len - hdrlen;
895 printk(KERN_WARNING "NFS: server cheating in read reply: "
896 "count %d > recvd %d\n", count, recvd);
901 if (count < res->count)
908 * Decode WRITE response
911 nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
915 status = ntohl(*p++);
916 p = xdr_decode_wcc_data(p, res->fattr);
919 return -nfs_stat_to_errno(status);
921 res->count = ntohl(*p++);
922 res->verf->committed = (enum nfs3_stable_how)ntohl(*p++);
923 res->verf->verifier[0] = *p++;
924 res->verf->verifier[1] = *p++;
930 * Decode a CREATE response
933 nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res)
937 status = ntohl(*p++);
940 if (!(p = xdr_decode_fhandle(p, res->fh)))
941 return -errno_NFSERR_IO;
942 p = xdr_decode_post_op_attr(p, res->fattr);
944 memset(res->fh, 0, sizeof(*res->fh));
945 /* Do decode post_op_attr but set it to NULL */
946 p = xdr_decode_post_op_attr(p, res->fattr);
947 res->fattr->valid = 0;
950 status = -nfs_stat_to_errno(status);
952 p = xdr_decode_wcc_data(p, res->dir_attr);
957 * Decode RENAME reply
960 nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs3_renameres *res)
964 if ((status = ntohl(*p++)) != 0)
965 status = -nfs_stat_to_errno(status);
966 p = xdr_decode_wcc_data(p, res->fromattr);
967 p = xdr_decode_wcc_data(p, res->toattr);
975 nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res)
979 if ((status = ntohl(*p++)) != 0)
980 status = -nfs_stat_to_errno(status);
981 p = xdr_decode_post_op_attr(p, res->fattr);
982 p = xdr_decode_wcc_data(p, res->dir_attr);
987 * Decode FSSTAT reply
990 nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res)
994 status = ntohl(*p++);
996 p = xdr_decode_post_op_attr(p, res->fattr);
998 return -nfs_stat_to_errno(status);
1000 p = xdr_decode_hyper(p, &res->tbytes);
1001 p = xdr_decode_hyper(p, &res->fbytes);
1002 p = xdr_decode_hyper(p, &res->abytes);
1003 p = xdr_decode_hyper(p, &res->tfiles);
1004 p = xdr_decode_hyper(p, &res->ffiles);
1005 p = xdr_decode_hyper(p, &res->afiles);
1007 /* ignore invarsec */
1012 * Decode FSINFO reply
1015 nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res)
1019 status = ntohl(*p++);
1021 p = xdr_decode_post_op_attr(p, res->fattr);
1023 return -nfs_stat_to_errno(status);
1025 res->rtmax = ntohl(*p++);
1026 res->rtpref = ntohl(*p++);
1027 res->rtmult = ntohl(*p++);
1028 res->wtmax = ntohl(*p++);
1029 res->wtpref = ntohl(*p++);
1030 res->wtmult = ntohl(*p++);
1031 res->dtpref = ntohl(*p++);
1032 p = xdr_decode_hyper(p, &res->maxfilesize);
1034 /* ignore time_delta and properties */
1035 res->lease_time = 0;
1040 * Decode PATHCONF reply
1043 nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res)
1047 status = ntohl(*p++);
1049 p = xdr_decode_post_op_attr(p, res->fattr);
1051 return -nfs_stat_to_errno(status);
1052 res->max_link = ntohl(*p++);
1053 res->max_namelen = ntohl(*p++);
1055 /* ignore remaining fields */
1060 * Decode COMMIT reply
1063 nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res)
1067 status = ntohl(*p++);
1068 p = xdr_decode_wcc_data(p, res->fattr);
1070 return -nfs_stat_to_errno(status);
1072 res->verf->verifier[0] = *p++;
1073 res->verf->verifier[1] = *p++;
1077 #ifdef CONFIG_NFS_V3_ACL
1079 * Decode GETACL reply
1082 nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p,
1083 struct nfs3_getaclres *res)
1085 struct xdr_buf *buf = &req->rq_rcv_buf;
1086 int status = ntohl(*p++);
1087 struct posix_acl **acl;
1088 unsigned int *aclcnt;
1092 return -nfs_stat_to_errno(status);
1093 p = xdr_decode_post_op_attr(p, res->fattr);
1094 res->mask = ntohl(*p++);
1095 if (res->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
1097 base = (char *)p - (char *)req->rq_rcv_buf.head->iov_base;
1099 acl = (res->mask & NFS_ACL) ? &res->acl_access : NULL;
1100 aclcnt = (res->mask & NFS_ACLCNT) ? &res->acl_access_count : NULL;
1101 err = nfsacl_decode(buf, base, aclcnt, acl);
1103 acl = (res->mask & NFS_DFACL) ? &res->acl_default : NULL;
1104 aclcnt = (res->mask & NFS_DFACLCNT) ? &res->acl_default_count : NULL;
1106 err = nfsacl_decode(buf, base + err, aclcnt, acl);
1107 return (err > 0) ? 0 : err;
1111 * Decode setacl reply.
1114 nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr)
1116 int status = ntohl(*p++);
1119 return -nfs_stat_to_errno(status);
1120 xdr_decode_post_op_attr(p, fattr);
1123 #endif /* CONFIG_NFS_V3_ACL */
1125 #define PROC(proc, argtype, restype, timer) \
1126 [NFS3PROC_##proc] = { \
1127 .p_proc = NFS3PROC_##proc, \
1128 .p_encode = (kxdrproc_t) nfs3_xdr_##argtype, \
1129 .p_decode = (kxdrproc_t) nfs3_xdr_##restype, \
1130 .p_arglen = NFS3_##argtype##_sz, \
1131 .p_replen = NFS3_##restype##_sz, \
1133 .p_statidx = NFS3PROC_##proc, \
1137 struct rpc_procinfo nfs3_procedures[] = {
1138 PROC(GETATTR, fhandle, attrstat, 1),
1139 PROC(SETATTR, sattrargs, wccstat, 0),
1140 PROC(LOOKUP, diropargs, lookupres, 2),
1141 PROC(ACCESS, accessargs, accessres, 1),
1142 PROC(READLINK, readlinkargs, readlinkres, 3),
1143 PROC(READ, readargs, readres, 3),
1144 PROC(WRITE, writeargs, writeres, 4),
1145 PROC(CREATE, createargs, createres, 0),
1146 PROC(MKDIR, mkdirargs, createres, 0),
1147 PROC(SYMLINK, symlinkargs, createres, 0),
1148 PROC(MKNOD, mknodargs, createres, 0),
1149 PROC(REMOVE, removeargs, removeres, 0),
1150 PROC(RMDIR, diropargs, wccstat, 0),
1151 PROC(RENAME, renameargs, renameres, 0),
1152 PROC(LINK, linkargs, linkres, 0),
1153 PROC(READDIR, readdirargs, readdirres, 3),
1154 PROC(READDIRPLUS, readdirargs, readdirres, 3),
1155 PROC(FSSTAT, fhandle, fsstatres, 0),
1156 PROC(FSINFO, fhandle, fsinfores, 0),
1157 PROC(PATHCONF, fhandle, pathconfres, 0),
1158 PROC(COMMIT, commitargs, commitres, 5),
1161 struct rpc_version nfs_version3 = {
1163 .nrprocs = ARRAY_SIZE(nfs3_procedures),
1164 .procs = nfs3_procedures
1167 #ifdef CONFIG_NFS_V3_ACL
1168 static struct rpc_procinfo nfs3_acl_procedures[] = {
1169 [ACLPROC3_GETACL] = {
1170 .p_proc = ACLPROC3_GETACL,
1171 .p_encode = (kxdrproc_t) nfs3_xdr_getaclargs,
1172 .p_decode = (kxdrproc_t) nfs3_xdr_getaclres,
1173 .p_arglen = ACL3_getaclargs_sz,
1174 .p_replen = ACL3_getaclres_sz,
1178 [ACLPROC3_SETACL] = {
1179 .p_proc = ACLPROC3_SETACL,
1180 .p_encode = (kxdrproc_t) nfs3_xdr_setaclargs,
1181 .p_decode = (kxdrproc_t) nfs3_xdr_setaclres,
1182 .p_arglen = ACL3_setaclargs_sz,
1183 .p_replen = ACL3_setaclres_sz,
1189 struct rpc_version nfsacl_version3 = {
1191 .nrprocs = sizeof(nfs3_acl_procedures)/
1192 sizeof(nfs3_acl_procedures[0]),
1193 .procs = nfs3_acl_procedures,
1195 #endif /* CONFIG_NFS_V3_ACL */