2 * linux/fs/nfsd/nfs3xdr.c
4 * XDR support for nfsd/protocol version 3.
6 * Copyright (C) 1995, 1996, 1997 Olaf Kirch <okir@monad.swb.de>
8 * 2003-08-09 Jamie Lokier: Use htonl() for nanoseconds, not htons()!
11 #include <linux/types.h>
12 #include <linux/time.h>
13 #include <linux/nfs3.h>
14 #include <linux/list.h>
15 #include <linux/spinlock.h>
16 #include <linux/dcache.h>
17 #include <linux/namei.h>
19 #include <linux/vfs.h>
20 #include <linux/sunrpc/xdr.h>
21 #include <linux/sunrpc/svc.h>
22 #include <linux/nfsd/nfsd.h>
23 #include <linux/nfsd/xdr3.h>
25 #define NFSDDBG_FACILITY NFSDDBG_XDR
29 * Mapping of S_IF* types to NFS file types
31 static u32 nfs3_ftypes[] = {
32 NF3NON, NF3FIFO, NF3CHR, NF3BAD,
33 NF3DIR, NF3BAD, NF3BLK, NF3BAD,
34 NF3REG, NF3BAD, NF3LNK, NF3BAD,
35 NF3SOCK, NF3BAD, NF3LNK, NF3BAD,
39 * XDR functions for basic NFS types
42 encode_time3(__be32 *p, struct timespec *time)
44 *p++ = htonl((u32) time->tv_sec); *p++ = htonl(time->tv_nsec);
49 decode_time3(__be32 *p, struct timespec *time)
51 time->tv_sec = ntohl(*p++);
52 time->tv_nsec = ntohl(*p++);
57 decode_fh(__be32 *p, struct svc_fh *fhp)
60 fh_init(fhp, NFS3_FHSIZE);
62 if (size > NFS3_FHSIZE)
65 memcpy(&fhp->fh_handle.fh_base, p, size);
66 fhp->fh_handle.fh_size = size;
67 return p + XDR_QUADLEN(size);
70 /* Helper function for NFSv3 ACL code */
71 __be32 *nfs3svc_decode_fh(__be32 *p, struct svc_fh *fhp)
73 return decode_fh(p, fhp);
77 encode_fh(__be32 *p, struct svc_fh *fhp)
79 unsigned int size = fhp->fh_handle.fh_size;
81 if (size) p[XDR_QUADLEN(size)-1]=0;
82 memcpy(p, &fhp->fh_handle.fh_base, size);
83 return p + XDR_QUADLEN(size);
87 * Decode a file name and make sure that the path contains
88 * no slashes or null bytes.
91 decode_filename(__be32 *p, char **namp, int *lenp)
96 if ((p = xdr_decode_string_inplace(p, namp, lenp, NFS3_MAXNAMLEN)) != NULL) {
97 for (i = 0, name = *namp; i < *lenp; i++, name++) {
98 if (*name == '\0' || *name == '/')
107 decode_sattr3(__be32 *p, struct iattr *iap)
114 iap->ia_valid |= ATTR_MODE;
115 iap->ia_mode = ntohl(*p++);
118 iap->ia_valid |= ATTR_UID;
119 iap->ia_uid = ntohl(*p++);
122 iap->ia_valid |= ATTR_GID;
123 iap->ia_gid = ntohl(*p++);
128 iap->ia_valid |= ATTR_SIZE;
129 p = xdr_decode_hyper(p, &newsize);
130 if (newsize <= NFS_OFFSET_MAX)
131 iap->ia_size = newsize;
133 iap->ia_size = NFS_OFFSET_MAX;
135 if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
136 iap->ia_valid |= ATTR_ATIME;
137 } else if (tmp == 2) { /* set to client time */
138 iap->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET;
139 iap->ia_atime.tv_sec = ntohl(*p++);
140 iap->ia_atime.tv_nsec = ntohl(*p++);
142 if ((tmp = ntohl(*p++)) == 1) { /* set to server time */
143 iap->ia_valid |= ATTR_MTIME;
144 } else if (tmp == 2) { /* set to client time */
145 iap->ia_valid |= ATTR_MTIME | ATTR_MTIME_SET;
146 iap->ia_mtime.tv_sec = ntohl(*p++);
147 iap->ia_mtime.tv_nsec = ntohl(*p++);
152 static __be32 *encode_fsid(__be32 *p, struct svc_fh *fhp)
155 switch(fsid_source(fhp)) {
158 p = xdr_encode_hyper(p, (u64)huge_encode_dev
159 (fhp->fh_dentry->d_inode->i_sb->s_dev));
161 case FSIDSOURCE_FSID:
162 p = xdr_encode_hyper(p, (u64) fhp->fh_export->ex_fsid);
164 case FSIDSOURCE_UUID:
165 f = ((u64*)fhp->fh_export->ex_uuid)[0];
166 f ^= ((u64*)fhp->fh_export->ex_uuid)[1];
167 p = xdr_encode_hyper(p, f);
174 encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
177 struct dentry *dentry = fhp->fh_dentry;
178 struct timespec time;
180 *p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
181 *p++ = htonl((u32) stat->mode);
182 *p++ = htonl((u32) stat->nlink);
183 *p++ = htonl((u32) nfsd_ruid(rqstp, stat->uid));
184 *p++ = htonl((u32) nfsd_rgid(rqstp, stat->gid));
185 if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
186 p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
188 p = xdr_encode_hyper(p, (u64) stat->size);
190 p = xdr_encode_hyper(p, ((u64)stat->blocks) << 9);
191 *p++ = htonl((u32) MAJOR(stat->rdev));
192 *p++ = htonl((u32) MINOR(stat->rdev));
193 p = encode_fsid(p, fhp);
194 p = xdr_encode_hyper(p, (u64) stat->ino);
195 p = encode_time3(p, &stat->atime);
196 lease_get_mtime(dentry->d_inode, &time);
197 p = encode_time3(p, &time);
198 p = encode_time3(p, &stat->ctime);
204 encode_saved_post_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
206 struct inode *inode = fhp->fh_dentry->d_inode;
208 /* Attributes to follow */
211 *p++ = htonl(nfs3_ftypes[(fhp->fh_post_mode & S_IFMT) >> 12]);
212 *p++ = htonl((u32) fhp->fh_post_mode);
213 *p++ = htonl((u32) fhp->fh_post_nlink);
214 *p++ = htonl((u32) nfsd_ruid(rqstp, fhp->fh_post_uid));
215 *p++ = htonl((u32) nfsd_rgid(rqstp, fhp->fh_post_gid));
216 if (S_ISLNK(fhp->fh_post_mode) && fhp->fh_post_size > NFS3_MAXPATHLEN) {
217 p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
219 p = xdr_encode_hyper(p, (u64) fhp->fh_post_size);
221 p = xdr_encode_hyper(p, ((u64)fhp->fh_post_blocks) << 9);
222 *p++ = fhp->fh_post_rdev[0];
223 *p++ = fhp->fh_post_rdev[1];
224 p = encode_fsid(p, fhp);
225 p = xdr_encode_hyper(p, (u64) inode->i_ino);
226 p = encode_time3(p, &fhp->fh_post_atime);
227 p = encode_time3(p, &fhp->fh_post_mtime);
228 p = encode_time3(p, &fhp->fh_post_ctime);
234 * Encode post-operation attributes.
235 * The inode may be NULL if the call failed because of a stale file
236 * handle. In this case, no attributes are returned.
239 encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
241 struct dentry *dentry = fhp->fh_dentry;
242 if (dentry && dentry->d_inode) {
246 err = vfs_getattr(fhp->fh_export->ex_mnt, dentry, &stat);
248 *p++ = xdr_one; /* attributes follow */
249 return encode_fattr3(rqstp, p, fhp, &stat);
256 /* Helper for NFSv3 ACLs */
258 nfs3svc_encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
260 return encode_post_op_attr(rqstp, p, fhp);
264 * Enocde weak cache consistency data
267 encode_wcc_data(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
269 struct dentry *dentry = fhp->fh_dentry;
271 if (dentry && dentry->d_inode && fhp->fh_post_saved) {
272 if (fhp->fh_pre_saved) {
274 p = xdr_encode_hyper(p, (u64) fhp->fh_pre_size);
275 p = encode_time3(p, &fhp->fh_pre_mtime);
276 p = encode_time3(p, &fhp->fh_pre_ctime);
280 return encode_saved_post_attr(rqstp, p, fhp);
282 /* no pre- or post-attrs */
284 return encode_post_op_attr(rqstp, p, fhp);
289 * XDR decode functions
292 nfs3svc_decode_fhandle(struct svc_rqst *rqstp, __be32 *p, struct nfsd_fhandle *args)
294 if (!(p = decode_fh(p, &args->fh)))
296 return xdr_argsize_check(rqstp, p);
300 nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
301 struct nfsd3_sattrargs *args)
303 if (!(p = decode_fh(p, &args->fh)))
305 p = decode_sattr3(p, &args->attrs);
307 if ((args->check_guard = ntohl(*p++)) != 0) {
308 struct timespec time;
309 p = decode_time3(p, &time);
310 args->guardtime = time.tv_sec;
313 return xdr_argsize_check(rqstp, p);
317 nfs3svc_decode_diropargs(struct svc_rqst *rqstp, __be32 *p,
318 struct nfsd3_diropargs *args)
320 if (!(p = decode_fh(p, &args->fh))
321 || !(p = decode_filename(p, &args->name, &args->len)))
324 return xdr_argsize_check(rqstp, p);
328 nfs3svc_decode_accessargs(struct svc_rqst *rqstp, __be32 *p,
329 struct nfsd3_accessargs *args)
331 if (!(p = decode_fh(p, &args->fh)))
333 args->access = ntohl(*p++);
335 return xdr_argsize_check(rqstp, p);
339 nfs3svc_decode_readargs(struct svc_rqst *rqstp, __be32 *p,
340 struct nfsd3_readargs *args)
344 u32 max_blocksize = svc_max_payload(rqstp);
346 if (!(p = decode_fh(p, &args->fh)))
348 p = xdr_decode_hyper(p, &args->offset);
350 len = args->count = ntohl(*p++);
352 if (len > max_blocksize)
355 /* set up the kvec */
358 pn = rqstp->rq_resused++;
359 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_respages[pn]);
360 rqstp->rq_vec[v].iov_len = len < PAGE_SIZE? len : PAGE_SIZE;
361 len -= rqstp->rq_vec[v].iov_len;
365 return xdr_argsize_check(rqstp, p);
369 nfs3svc_decode_writeargs(struct svc_rqst *rqstp, __be32 *p,
370 struct nfsd3_writeargs *args)
372 unsigned int len, v, hdr, dlen;
373 u32 max_blocksize = svc_max_payload(rqstp);
375 if (!(p = decode_fh(p, &args->fh)))
377 p = xdr_decode_hyper(p, &args->offset);
379 args->count = ntohl(*p++);
380 args->stable = ntohl(*p++);
381 len = args->len = ntohl(*p++);
383 * The count must equal the amount of data passed.
385 if (args->count != args->len)
389 * Check to make sure that we got the right number of
392 hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
393 dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
396 * Round the length of the data which was specified up to
397 * the next multiple of XDR units and then compare that
398 * against the length which was actually received.
400 if (dlen != XDR_QUADLEN(len)*4)
403 if (args->count > max_blocksize) {
404 args->count = max_blocksize;
405 len = args->len = max_blocksize;
407 rqstp->rq_vec[0].iov_base = (void*)p;
408 rqstp->rq_vec[0].iov_len = rqstp->rq_arg.head[0].iov_len - hdr;
410 while (len > rqstp->rq_vec[v].iov_len) {
411 len -= rqstp->rq_vec[v].iov_len;
413 rqstp->rq_vec[v].iov_base = page_address(rqstp->rq_pages[v]);
414 rqstp->rq_vec[v].iov_len = PAGE_SIZE;
416 rqstp->rq_vec[v].iov_len = len;
422 nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
423 struct nfsd3_createargs *args)
425 if (!(p = decode_fh(p, &args->fh))
426 || !(p = decode_filename(p, &args->name, &args->len)))
429 switch (args->createmode = ntohl(*p++)) {
430 case NFS3_CREATE_UNCHECKED:
431 case NFS3_CREATE_GUARDED:
432 p = decode_sattr3(p, &args->attrs);
434 case NFS3_CREATE_EXCLUSIVE:
442 return xdr_argsize_check(rqstp, p);
445 nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p,
446 struct nfsd3_createargs *args)
448 if (!(p = decode_fh(p, &args->fh)) ||
449 !(p = decode_filename(p, &args->name, &args->len)))
451 p = decode_sattr3(p, &args->attrs);
453 return xdr_argsize_check(rqstp, p);
457 nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
458 struct nfsd3_symlinkargs *args)
465 if (!(p = decode_fh(p, &args->ffh)) ||
466 !(p = decode_filename(p, &args->fname, &args->flen))
469 p = decode_sattr3(p, &args->attrs);
471 /* now decode the pathname, which might be larger than the first page.
472 * As we have to check for nul's anyway, we copy it into a new page
473 * This page appears in the rq_res.pages list, but as pages_len is always
474 * 0, it won't get in the way
477 if (len == 0 || len > NFS3_MAXPATHLEN || len >= PAGE_SIZE)
480 page_address(rqstp->rq_respages[rqstp->rq_resused++]);
482 /* first copy and check from the first page */
484 vec = &rqstp->rq_arg.head[0];
485 avail = vec->iov_len - (old - (char*)vec->iov_base);
486 while (len && avail && *old) {
491 /* now copy next page if there is one */
492 if (len && !avail && rqstp->rq_arg.page_len) {
493 avail = rqstp->rq_arg.page_len;
494 if (avail > PAGE_SIZE) avail = PAGE_SIZE;
495 old = page_address(rqstp->rq_arg.pages[0]);
497 while (len && avail && *old) {
510 nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p,
511 struct nfsd3_mknodargs *args)
513 if (!(p = decode_fh(p, &args->fh))
514 || !(p = decode_filename(p, &args->name, &args->len)))
517 args->ftype = ntohl(*p++);
519 if (args->ftype == NF3BLK || args->ftype == NF3CHR
520 || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
521 p = decode_sattr3(p, &args->attrs);
523 if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
524 args->major = ntohl(*p++);
525 args->minor = ntohl(*p++);
528 return xdr_argsize_check(rqstp, p);
532 nfs3svc_decode_renameargs(struct svc_rqst *rqstp, __be32 *p,
533 struct nfsd3_renameargs *args)
535 if (!(p = decode_fh(p, &args->ffh))
536 || !(p = decode_filename(p, &args->fname, &args->flen))
537 || !(p = decode_fh(p, &args->tfh))
538 || !(p = decode_filename(p, &args->tname, &args->tlen)))
541 return xdr_argsize_check(rqstp, p);
545 nfs3svc_decode_readlinkargs(struct svc_rqst *rqstp, __be32 *p,
546 struct nfsd3_readlinkargs *args)
548 if (!(p = decode_fh(p, &args->fh)))
551 page_address(rqstp->rq_respages[rqstp->rq_resused++]);
553 return xdr_argsize_check(rqstp, p);
557 nfs3svc_decode_linkargs(struct svc_rqst *rqstp, __be32 *p,
558 struct nfsd3_linkargs *args)
560 if (!(p = decode_fh(p, &args->ffh))
561 || !(p = decode_fh(p, &args->tfh))
562 || !(p = decode_filename(p, &args->tname, &args->tlen)))
565 return xdr_argsize_check(rqstp, p);
569 nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p,
570 struct nfsd3_readdirargs *args)
572 if (!(p = decode_fh(p, &args->fh)))
574 p = xdr_decode_hyper(p, &args->cookie);
575 args->verf = p; p += 2;
577 args->count = ntohl(*p++);
579 if (args->count > PAGE_SIZE)
580 args->count = PAGE_SIZE;
583 page_address(rqstp->rq_respages[rqstp->rq_resused++]);
585 return xdr_argsize_check(rqstp, p);
589 nfs3svc_decode_readdirplusargs(struct svc_rqst *rqstp, __be32 *p,
590 struct nfsd3_readdirargs *args)
593 u32 max_blocksize = svc_max_payload(rqstp);
595 if (!(p = decode_fh(p, &args->fh)))
597 p = xdr_decode_hyper(p, &args->cookie);
598 args->verf = p; p += 2;
599 args->dircount = ntohl(*p++);
600 args->count = ntohl(*p++);
602 len = (args->count > max_blocksize) ? max_blocksize :
607 pn = rqstp->rq_resused++;
609 args->buffer = page_address(rqstp->rq_respages[pn]);
613 return xdr_argsize_check(rqstp, p);
617 nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p,
618 struct nfsd3_commitargs *args)
620 if (!(p = decode_fh(p, &args->fh)))
622 p = xdr_decode_hyper(p, &args->offset);
623 args->count = ntohl(*p++);
625 return xdr_argsize_check(rqstp, p);
629 * XDR encode functions
632 * There must be an encoding function for void results so svc_process
633 * will work properly.
636 nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
638 return xdr_ressize_check(rqstp, p);
643 nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p,
644 struct nfsd3_attrstat *resp)
646 if (resp->status == 0)
647 p = encode_fattr3(rqstp, p, &resp->fh, &resp->stat);
648 return xdr_ressize_check(rqstp, p);
651 /* SETATTR, REMOVE, RMDIR */
653 nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p,
654 struct nfsd3_attrstat *resp)
656 p = encode_wcc_data(rqstp, p, &resp->fh);
657 return xdr_ressize_check(rqstp, p);
662 nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p,
663 struct nfsd3_diropres *resp)
665 if (resp->status == 0) {
666 p = encode_fh(p, &resp->fh);
667 p = encode_post_op_attr(rqstp, p, &resp->fh);
669 p = encode_post_op_attr(rqstp, p, &resp->dirfh);
670 return xdr_ressize_check(rqstp, p);
675 nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p,
676 struct nfsd3_accessres *resp)
678 p = encode_post_op_attr(rqstp, p, &resp->fh);
679 if (resp->status == 0)
680 *p++ = htonl(resp->access);
681 return xdr_ressize_check(rqstp, p);
686 nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p,
687 struct nfsd3_readlinkres *resp)
689 p = encode_post_op_attr(rqstp, p, &resp->fh);
690 if (resp->status == 0) {
691 *p++ = htonl(resp->len);
692 xdr_ressize_check(rqstp, p);
693 rqstp->rq_res.page_len = resp->len;
695 /* need to pad the tail */
696 rqstp->rq_res.tail[0].iov_base = p;
698 rqstp->rq_res.tail[0].iov_len = 4 - (resp->len&3);
702 return xdr_ressize_check(rqstp, p);
707 nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p,
708 struct nfsd3_readres *resp)
710 p = encode_post_op_attr(rqstp, p, &resp->fh);
711 if (resp->status == 0) {
712 *p++ = htonl(resp->count);
713 *p++ = htonl(resp->eof);
714 *p++ = htonl(resp->count); /* xdr opaque count */
715 xdr_ressize_check(rqstp, p);
716 /* now update rqstp->rq_res to reflect data aswell */
717 rqstp->rq_res.page_len = resp->count;
718 if (resp->count & 3) {
719 /* need to pad the tail */
720 rqstp->rq_res.tail[0].iov_base = p;
722 rqstp->rq_res.tail[0].iov_len = 4 - (resp->count & 3);
726 return xdr_ressize_check(rqstp, p);
731 nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p,
732 struct nfsd3_writeres *resp)
734 p = encode_wcc_data(rqstp, p, &resp->fh);
735 if (resp->status == 0) {
736 *p++ = htonl(resp->count);
737 *p++ = htonl(resp->committed);
738 *p++ = htonl(nfssvc_boot.tv_sec);
739 *p++ = htonl(nfssvc_boot.tv_usec);
741 return xdr_ressize_check(rqstp, p);
744 /* CREATE, MKDIR, SYMLINK, MKNOD */
746 nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p,
747 struct nfsd3_diropres *resp)
749 if (resp->status == 0) {
751 p = encode_fh(p, &resp->fh);
752 p = encode_post_op_attr(rqstp, p, &resp->fh);
754 p = encode_wcc_data(rqstp, p, &resp->dirfh);
755 return xdr_ressize_check(rqstp, p);
760 nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p,
761 struct nfsd3_renameres *resp)
763 p = encode_wcc_data(rqstp, p, &resp->ffh);
764 p = encode_wcc_data(rqstp, p, &resp->tfh);
765 return xdr_ressize_check(rqstp, p);
770 nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p,
771 struct nfsd3_linkres *resp)
773 p = encode_post_op_attr(rqstp, p, &resp->fh);
774 p = encode_wcc_data(rqstp, p, &resp->tfh);
775 return xdr_ressize_check(rqstp, p);
780 nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p,
781 struct nfsd3_readdirres *resp)
783 p = encode_post_op_attr(rqstp, p, &resp->fh);
785 if (resp->status == 0) {
786 /* stupid readdir cookie */
787 memcpy(p, resp->verf, 8); p += 2;
788 xdr_ressize_check(rqstp, p);
789 if (rqstp->rq_res.head[0].iov_len + (2<<2) > PAGE_SIZE)
790 return 1; /*No room for trailer */
791 rqstp->rq_res.page_len = (resp->count) << 2;
793 /* add the 'tail' to the end of the 'head' page - page 0. */
794 rqstp->rq_res.tail[0].iov_base = p;
795 *p++ = 0; /* no more entries */
796 *p++ = htonl(resp->common.err == nfserr_eof);
797 rqstp->rq_res.tail[0].iov_len = 2<<2;
800 return xdr_ressize_check(rqstp, p);
804 encode_entry_baggage(struct nfsd3_readdirres *cd, __be32 *p, const char *name,
805 int namlen, ino_t ino)
807 *p++ = xdr_one; /* mark entry present */
808 p = xdr_encode_hyper(p, ino); /* file id */
809 p = xdr_encode_array(p, name, namlen);/* name length & name */
811 cd->offset = p; /* remember pointer */
812 p = xdr_encode_hyper(p, NFS_OFFSET_MAX);/* offset of next entry */
818 encode_entryplus_baggage(struct nfsd3_readdirres *cd, __be32 *p,
821 p = encode_post_op_attr(cd->rqstp, p, fhp);
822 *p++ = xdr_one; /* yes, a file handle follows */
823 p = encode_fh(p, fhp);
829 compose_entry_fh(struct nfsd3_readdirres *cd, struct svc_fh *fhp,
830 const char *name, int namlen)
832 struct svc_export *exp;
833 struct dentry *dparent, *dchild;
836 dparent = cd->fh.fh_dentry;
837 exp = cd->fh.fh_export;
839 fh_init(fhp, NFS3_FHSIZE);
840 if (isdotent(name, namlen)) {
842 dchild = dget_parent(dparent);
843 if (dchild == dparent) {
844 /* filesystem root - cannot return filehandle for ".." */
849 dchild = dget(dparent);
851 dchild = lookup_one_len(name, dparent, namlen);
854 if (d_mountpoint(dchild) ||
855 fh_compose(fhp, exp, dchild, &cd->fh) != 0 ||
863 * Encode a directory entry. This one works for both normal readdir
865 * The normal readdir reply requires 2 (fileid) + 1 (stringlen)
866 * + string + 2 (cookie) + 1 (next) words, i.e. 6 + strlen.
868 * The readdirplus baggage is 1+21 words for post_op_attr, plus the
872 #define NFS3_ENTRY_BAGGAGE (2 + 1 + 2 + 1)
873 #define NFS3_ENTRYPLUS_BAGGAGE (1 + 21 + 1 + (NFS3_FHSIZE >> 2))
875 encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
876 loff_t offset, ino_t ino, unsigned int d_type, int plus)
878 struct nfsd3_readdirres *cd = container_of(ccd, struct nfsd3_readdirres,
880 __be32 *p = cd->buffer;
881 caddr_t curr_page_addr = NULL;
882 int pn; /* current page number */
883 int slen; /* string (name) length */
884 int elen; /* estimated entry length in words */
885 int num_entry_words = 0; /* actual number of words */
888 u64 offset64 = offset;
890 if (unlikely(cd->offset1)) {
891 /* we ended up with offset on a page boundary */
892 *cd->offset = htonl(offset64 >> 32);
893 *cd->offset1 = htonl(offset64 & 0xffffffff);
896 xdr_encode_hyper(cd->offset, offset64);
901 dprintk("encode_entry(%.*s @%ld%s)\n",
902 namlen, name, (long) offset, plus? " plus" : "");
905 /* truncate filename if too long */
906 if (namlen > NFS3_MAXNAMLEN)
907 namlen = NFS3_MAXNAMLEN;
909 slen = XDR_QUADLEN(namlen);
910 elen = slen + NFS3_ENTRY_BAGGAGE
911 + (plus? NFS3_ENTRYPLUS_BAGGAGE : 0);
913 if (cd->buflen < elen) {
914 cd->common.err = nfserr_toosmall;
918 /* determine which page in rq_respages[] we are currently filling */
919 for (pn=1; pn < cd->rqstp->rq_resused; pn++) {
920 curr_page_addr = page_address(cd->rqstp->rq_respages[pn]);
922 if (((caddr_t)cd->buffer >= curr_page_addr) &&
923 ((caddr_t)cd->buffer < curr_page_addr + PAGE_SIZE))
927 if ((caddr_t)(cd->buffer + elen) < (curr_page_addr + PAGE_SIZE)) {
928 /* encode entry in current page */
930 p = encode_entry_baggage(cd, p, name, namlen, ino);
932 /* throw in readdirplus baggage */
936 if (compose_entry_fh(cd, &fh, name, namlen) > 0) {
940 p = encode_entryplus_baggage(cd, p, &fh);
942 num_entry_words = p - cd->buffer;
943 } else if (cd->rqstp->rq_respages[pn+1] != NULL) {
944 /* temporarily encode entry into next page, then move back to
945 * current and next page in rq_respages[] */
949 /* grab next page for temporary storage of entry */
950 p1 = tmp = page_address(cd->rqstp->rq_respages[pn+1]);
952 p1 = encode_entry_baggage(cd, p1, name, namlen, ino);
954 /* throw in readdirplus baggage */
958 if (compose_entry_fh(cd, &fh, name, namlen) > 0) {
959 /* zero out the filehandle */
963 p1 = encode_entryplus_baggage(cd, p1, &fh);
966 /* determine entry word length and lengths to go in pages */
967 num_entry_words = p1 - tmp;
968 len1 = curr_page_addr + PAGE_SIZE - (caddr_t)cd->buffer;
969 if ((num_entry_words << 2) < len1) {
970 /* the actual number of words in the entry is less
971 * than elen and can still fit in the current page
973 memmove(p, tmp, num_entry_words << 2);
974 p += num_entry_words;
977 cd->offset = cd->buffer + (cd->offset - tmp);
979 unsigned int offset_r = (cd->offset - tmp) << 2;
981 /* update pointer to offset location.
982 * This is a 64bit quantity, so we need to
984 * - entirely in first page
985 * - entirely in second page
986 * - 4 bytes in each page
988 if (offset_r + 8 <= len1) {
989 cd->offset = p + (cd->offset - tmp);
990 } else if (offset_r >= len1) {
991 cd->offset -= len1 >> 2;
993 /* sitting on the fence */
994 BUG_ON(offset_r != len1 - 4);
995 cd->offset = p + (cd->offset - tmp);
999 len2 = (num_entry_words << 2) - len1;
1001 /* move from temp page to current and next pages */
1002 memmove(p, tmp, len1);
1003 memmove(tmp, (caddr_t)tmp+len1, len2);
1005 p = tmp + (len2 >> 2);
1009 cd->common.err = nfserr_toosmall;
1013 cd->buflen -= num_entry_words;
1015 cd->common.err = nfs_ok;
1021 nfs3svc_encode_entry(void *cd, const char *name,
1022 int namlen, loff_t offset, u64 ino, unsigned int d_type)
1024 return encode_entry(cd, name, namlen, offset, ino, d_type, 0);
1028 nfs3svc_encode_entry_plus(void *cd, const char *name,
1029 int namlen, loff_t offset, u64 ino,
1030 unsigned int d_type)
1032 return encode_entry(cd, name, namlen, offset, ino, d_type, 1);
1037 nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p,
1038 struct nfsd3_fsstatres *resp)
1040 struct kstatfs *s = &resp->stats;
1041 u64 bs = s->f_bsize;
1043 *p++ = xdr_zero; /* no post_op_attr */
1045 if (resp->status == 0) {
1046 p = xdr_encode_hyper(p, bs * s->f_blocks); /* total bytes */
1047 p = xdr_encode_hyper(p, bs * s->f_bfree); /* free bytes */
1048 p = xdr_encode_hyper(p, bs * s->f_bavail); /* user available bytes */
1049 p = xdr_encode_hyper(p, s->f_files); /* total inodes */
1050 p = xdr_encode_hyper(p, s->f_ffree); /* free inodes */
1051 p = xdr_encode_hyper(p, s->f_ffree); /* user available inodes */
1052 *p++ = htonl(resp->invarsec); /* mean unchanged time */
1054 return xdr_ressize_check(rqstp, p);
1059 nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p,
1060 struct nfsd3_fsinfores *resp)
1062 *p++ = xdr_zero; /* no post_op_attr */
1064 if (resp->status == 0) {
1065 *p++ = htonl(resp->f_rtmax);
1066 *p++ = htonl(resp->f_rtpref);
1067 *p++ = htonl(resp->f_rtmult);
1068 *p++ = htonl(resp->f_wtmax);
1069 *p++ = htonl(resp->f_wtpref);
1070 *p++ = htonl(resp->f_wtmult);
1071 *p++ = htonl(resp->f_dtpref);
1072 p = xdr_encode_hyper(p, resp->f_maxfilesize);
1075 *p++ = htonl(resp->f_properties);
1078 return xdr_ressize_check(rqstp, p);
1083 nfs3svc_encode_pathconfres(struct svc_rqst *rqstp, __be32 *p,
1084 struct nfsd3_pathconfres *resp)
1086 *p++ = xdr_zero; /* no post_op_attr */
1088 if (resp->status == 0) {
1089 *p++ = htonl(resp->p_link_max);
1090 *p++ = htonl(resp->p_name_max);
1091 *p++ = htonl(resp->p_no_trunc);
1092 *p++ = htonl(resp->p_chown_restricted);
1093 *p++ = htonl(resp->p_case_insensitive);
1094 *p++ = htonl(resp->p_case_preserving);
1097 return xdr_ressize_check(rqstp, p);
1102 nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p,
1103 struct nfsd3_commitres *resp)
1105 p = encode_wcc_data(rqstp, p, &resp->fh);
1106 /* Write verifier */
1107 if (resp->status == 0) {
1108 *p++ = htonl(nfssvc_boot.tv_sec);
1109 *p++ = htonl(nfssvc_boot.tv_usec);
1111 return xdr_ressize_check(rqstp, p);
1115 * XDR release functions
1118 nfs3svc_release_fhandle(struct svc_rqst *rqstp, __be32 *p,
1119 struct nfsd3_attrstat *resp)
1126 nfs3svc_release_fhandle2(struct svc_rqst *rqstp, __be32 *p,
1127 struct nfsd3_fhandle_pair *resp)