4 * Server-side XDR for NFSv4
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
45 #include <linux/param.h>
46 #include <linux/smp.h>
47 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/vfs.h>
51 #include <linux/sunrpc/xdr.h>
52 #include <linux/sunrpc/svc.h>
53 #include <linux/sunrpc/clnt.h>
54 #include <linux/nfsd/nfsd.h>
55 #include <linux/nfsd/state.h>
56 #include <linux/nfsd/xdr4.h>
57 #include <linux/nfsd_idmap.h>
58 #include <linux/nfs4.h>
59 #include <linux/nfs4_acl.h>
60 #include <linux/vserver/xid.h>
62 #define NFSDDBG_FACILITY NFSDDBG_XDR
64 static const char utf8_byte_len[256] = {
65 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
66 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
67 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
68 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
69 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
70 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
71 0,0,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
72 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4,5,5,5,5,6,6,0,0
76 is_legal_utf8_sequence(unsigned char *source, int length)
81 if (length==1) return 1;
83 /* Check for overlong sequence, and check second byte */
86 case 0xE0: /* 3 bytes */
87 if ( c < 0xA0 ) return 0;
89 case 0xF0: /* 4 bytes */
90 if ( c < 0x90 ) return 0;
92 case 0xF8: /* 5 bytes */
93 if ( c < 0xC8 ) return 0;
95 case 0xFC: /* 6 bytes */
96 if ( c < 0x84 ) return 0;
99 if ( (c & 0xC0) != 0x80) return 0;
102 /* Check that trailing bytes look like 10xxxxxx */
103 for (ptr = source++ + length - 1; ptr>source; ptr--)
104 if ( ((*ptr) & 0xC0) != 0x80 ) return 0;
108 /* This does some screening on disallowed unicode characters. It is NOT
112 is_allowed_utf8_char(unsigned char *source, int length)
114 /* We assume length and source point to a valid utf8 sequence */
117 /* Disallow F0000 and up (in utf8, F3B08080) */
118 if (*source > 0xF3 ) return 0;
122 if (c >= 0xB0) return 0;
124 /* Disallow D800-F8FF (in utf8, EDA080-EFA3BF */
126 if (c >= 0xA0) return 0;
132 if (c <= 0xA3) return 0;
133 /* Disallow FFF9-FFFF (EFBFB9-EFBFBF) */
135 /* Don't need to check <=0xBF, since valid utf8 */
136 if ( *(source+2) >= 0xB9) return 0;
142 /* This routine should really check to see that the proper stringprep
143 * mappings have been applied. Instead, we do a simple screen of some
144 * of the more obvious illegal values by calling is_allowed_utf8_char.
145 * This will allow many illegal strings through, but if a client behaves,
146 * it will get full functionality. The other option (apart from full
147 * stringprep checking) is to limit everything to an easily handled subset,
148 * such as 7-bit ascii.
150 * Note - currently calling routines ignore return value except as boolean.
153 check_utf8(char *str, int len)
155 unsigned char *chunk, *sourceend;
159 sourceend = str + len;
161 while (chunk < sourceend) {
162 chunklen = utf8_byte_len[*chunk];
165 if (chunk + chunklen > sourceend)
167 if (!is_legal_utf8_sequence(chunk, chunklen))
169 if (!is_allowed_utf8_char(chunk, chunklen))
171 if ( (chunklen==1) && (!*chunk) )
172 return nfserr_inval; /* Disallow embedded nulls */
180 check_filename(char *str, int len, int err)
186 if (isdotent(str, len))
188 for (i = 0; i < len; i++)
191 return check_utf8(str, len);
195 * START OF "GENERIC" DECODE ROUTINES.
196 * These may look a little ugly since they are imported from a "generic"
197 * set of XDR encode/decode routines which are intended to be shared by
198 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
200 * If the pain of reading these is too great, it should be a straightforward
201 * task to translate them into Linux-specific versions which are more
202 * consistent with the style used in NFSv2/v3...
204 #define DECODE_HEAD \
207 #define DECODE_TAIL \
212 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
213 status = nfserr_bad_xdr; \
216 #define READ32(x) (x) = ntohl(*p++)
217 #define READ64(x) do { \
218 (x) = (u64)ntohl(*p++) << 32; \
219 (x) |= ntohl(*p++); \
221 #define READTIME(x) do { \
226 #define READMEM(x,nbytes) do { \
228 p += XDR_QUADLEN(nbytes); \
230 #define SAVEMEM(x,nbytes) do { \
231 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
232 savemem(argp, p, nbytes) : \
234 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
237 p += XDR_QUADLEN(nbytes); \
239 #define COPYMEM(x,nbytes) do { \
240 memcpy((x), p, nbytes); \
241 p += XDR_QUADLEN(nbytes); \
244 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
245 #define READ_BUF(nbytes) do { \
246 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
248 argp->p += XDR_QUADLEN(nbytes); \
249 } else if (!(p = read_buf(argp, nbytes))) { \
250 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
255 u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
257 /* We want more bytes than seem to be available.
258 * Maybe we need a new page, maybe we have just run out
260 int avail = (char*)argp->end - (char*)argp->p;
262 if (avail + argp->pagelen < nbytes)
264 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
266 /* ok, we can do it with the current plus the next page */
267 if (nbytes <= sizeof(argp->tmp))
272 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
277 memcpy(p, argp->p, avail);
278 /* step to next page */
279 argp->p = page_address(argp->pagelist[0]);
281 if (argp->pagelen < PAGE_SIZE) {
282 argp->end = p + (argp->pagelen>>2);
285 argp->end = p + (PAGE_SIZE>>2);
286 argp->pagelen -= PAGE_SIZE;
288 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
289 argp->p += XDR_QUADLEN(nbytes - avail);
294 defer_free(struct nfsd4_compoundargs *argp,
295 void (*release)(const void *), void *p)
299 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
303 tb->release = release;
304 tb->next = argp->to_free;
309 char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
312 if (p == argp->tmp) {
313 new = kmalloc(nbytes, GFP_KERNEL);
314 if (!new) return NULL;
316 memcpy(p, argp->tmp, nbytes);
322 if (defer_free(argp, kfree, p)) {
331 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
344 READ_BUF(bmlen << 2);
354 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
355 struct nfs4_acl **acl)
357 int expected_len, len = 0;
363 if ((status = nfsd4_decode_bitmap(argp, bmval)))
367 * According to spec, unsupported attributes return ERR_NOTSUPP;
368 * read-only attributes return ERR_INVAL.
370 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
371 return nfserr_attrnotsupp;
372 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
376 READ32(expected_len);
378 if (bmval[0] & FATTR4_WORD0_SIZE) {
381 READ64(iattr->ia_size);
382 iattr->ia_valid |= ATTR_SIZE;
384 if (bmval[0] & FATTR4_WORD0_ACL) {
388 READ_BUF(4); len += 4;
391 *acl = nfs4_acl_new();
396 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
398 for (i = 0; i < nace; i++) {
399 READ_BUF(16); len += 16;
402 READ32(ace.access_mask);
405 len += XDR_QUADLEN(dummy32) << 2;
406 READMEM(buf, dummy32);
407 if (check_utf8(buf, dummy32))
409 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
411 if (ace.whotype != NFS4_ACL_WHO_NAMED)
413 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
414 status = nfsd_map_name_to_gid(argp->rqstp,
415 buf, dummy32, &ace.who);
417 status = nfsd_map_name_to_uid(argp->rqstp,
418 buf, dummy32, &ace.who);
421 if (nfs4_acl_add_ace(*acl, ace.type, ace.flag,
422 ace.access_mask, ace.whotype, ace.who) != 0) {
429 if (bmval[1] & FATTR4_WORD1_MODE) {
432 READ32(iattr->ia_mode);
433 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
434 iattr->ia_valid |= ATTR_MODE;
436 if (bmval[1] & FATTR4_WORD1_OWNER) {
441 len += (XDR_QUADLEN(dummy32) << 2);
442 READMEM(buf, dummy32);
443 if (check_utf8(buf, dummy32))
445 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
447 iattr->ia_valid |= ATTR_UID;
449 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
454 len += (XDR_QUADLEN(dummy32) << 2);
455 READMEM(buf, dummy32);
456 if (check_utf8(buf, dummy32))
458 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
460 iattr->ia_valid |= ATTR_GID;
462 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
467 case NFS4_SET_TO_CLIENT_TIME:
468 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
469 all 32 bits of 'nseconds'. */
475 READ32(iattr->ia_atime.tv_sec);
476 READ32(iattr->ia_atime.tv_nsec);
477 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
479 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
481 case NFS4_SET_TO_SERVER_TIME:
482 iattr->ia_valid |= ATTR_ATIME;
488 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
489 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
490 all 32 bits of 'nseconds'. */
496 READ32(iattr->ia_ctime.tv_sec);
497 READ32(iattr->ia_ctime.tv_nsec);
498 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
500 iattr->ia_valid |= ATTR_CTIME;
502 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
507 case NFS4_SET_TO_CLIENT_TIME:
508 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
509 all 32 bits of 'nseconds'. */
515 READ32(iattr->ia_mtime.tv_sec);
516 READ32(iattr->ia_mtime.tv_nsec);
517 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
519 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
521 case NFS4_SET_TO_SERVER_TIME:
522 iattr->ia_valid |= ATTR_MTIME;
528 if (len != expected_len)
534 status = nfserrno(status);
539 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
544 READ32(access->ac_req_access);
550 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
554 close->cl_stateowner = NULL;
555 READ_BUF(4 + sizeof(stateid_t));
556 READ32(close->cl_seqid);
557 READ32(close->cl_stateid.si_generation);
558 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
565 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
570 READ64(commit->co_offset);
571 READ32(commit->co_count);
577 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
582 READ32(create->cr_type);
583 switch (create->cr_type) {
586 READ32(create->cr_linklen);
587 READ_BUF(create->cr_linklen);
588 SAVEMEM(create->cr_linkname, create->cr_linklen);
589 if (check_utf8(create->cr_linkname, create->cr_linklen))
595 READ32(create->cr_specdata1);
596 READ32(create->cr_specdata2);
606 READ32(create->cr_namelen);
607 READ_BUF(create->cr_namelen);
608 SAVEMEM(create->cr_name, create->cr_namelen);
609 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
612 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
619 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
621 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
625 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
630 READ32(link->li_namelen);
631 READ_BUF(link->li_namelen);
632 SAVEMEM(link->li_name, link->li_namelen);
633 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
640 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
644 lock->lk_stateowner = NULL;
646 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
649 READ32(lock->lk_type);
650 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
652 READ32(lock->lk_reclaim);
653 READ64(lock->lk_offset);
654 READ64(lock->lk_length);
655 READ32(lock->lk_is_new);
657 if (lock->lk_is_new) {
659 READ32(lock->lk_new_open_seqid);
660 READ32(lock->lk_new_open_stateid.si_generation);
662 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
663 READ32(lock->lk_new_lock_seqid);
664 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
665 READ32(lock->lk_new_owner.len);
666 READ_BUF(lock->lk_new_owner.len);
667 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
670 READ32(lock->lk_old_lock_stateid.si_generation);
671 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
672 READ32(lock->lk_old_lock_seqid);
679 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
684 READ32(lockt->lt_type);
685 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
687 READ64(lockt->lt_offset);
688 READ64(lockt->lt_length);
689 COPYMEM(&lockt->lt_clientid, 8);
690 READ32(lockt->lt_owner.len);
691 READ_BUF(lockt->lt_owner.len);
692 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
698 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
702 locku->lu_stateowner = NULL;
703 READ_BUF(24 + sizeof(stateid_t));
704 READ32(locku->lu_type);
705 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
707 READ32(locku->lu_seqid);
708 READ32(locku->lu_stateid.si_generation);
709 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
710 READ64(locku->lu_offset);
711 READ64(locku->lu_length);
717 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
722 READ32(lookup->lo_len);
723 READ_BUF(lookup->lo_len);
724 SAVEMEM(lookup->lo_name, lookup->lo_len);
725 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
732 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
736 memset(open->op_bmval, 0, sizeof(open->op_bmval));
737 open->op_iattr.ia_valid = 0;
738 open->op_stateowner = NULL;
740 /* seqid, share_access, share_deny, clientid, ownerlen */
741 READ_BUF(16 + sizeof(clientid_t));
742 READ32(open->op_seqid);
743 READ32(open->op_share_access);
744 READ32(open->op_share_deny);
745 COPYMEM(&open->op_clientid, sizeof(clientid_t));
746 READ32(open->op_owner.len);
748 /* owner, open_flag */
749 READ_BUF(open->op_owner.len + 4);
750 SAVEMEM(open->op_owner.data, open->op_owner.len);
751 READ32(open->op_create);
752 switch (open->op_create) {
753 case NFS4_OPEN_NOCREATE:
755 case NFS4_OPEN_CREATE:
757 READ32(open->op_createmode);
758 switch (open->op_createmode) {
759 case NFS4_CREATE_UNCHECKED:
760 case NFS4_CREATE_GUARDED:
761 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
764 case NFS4_CREATE_EXCLUSIVE:
766 COPYMEM(open->op_verf.data, 8);
778 READ32(open->op_claim_type);
779 switch (open->op_claim_type) {
780 case NFS4_OPEN_CLAIM_NULL:
781 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
783 READ32(open->op_fname.len);
784 READ_BUF(open->op_fname.len);
785 SAVEMEM(open->op_fname.data, open->op_fname.len);
786 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
789 case NFS4_OPEN_CLAIM_PREVIOUS:
791 READ32(open->op_delegate_type);
793 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
794 READ_BUF(sizeof(delegation_stateid_t) + 4);
795 COPYMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
796 READ32(open->op_fname.len);
797 READ_BUF(open->op_fname.len);
798 SAVEMEM(open->op_fname.data, open->op_fname.len);
799 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
810 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
814 open_conf->oc_stateowner = NULL;
815 READ_BUF(4 + sizeof(stateid_t));
816 READ32(open_conf->oc_req_stateid.si_generation);
817 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
818 READ32(open_conf->oc_seqid);
824 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
828 open_down->od_stateowner = NULL;
829 READ_BUF(4 + sizeof(stateid_t));
830 READ32(open_down->od_stateid.si_generation);
831 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
832 READ32(open_down->od_seqid);
833 READ32(open_down->od_share_access);
834 READ32(open_down->od_share_deny);
840 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
845 READ32(putfh->pf_fhlen);
846 if (putfh->pf_fhlen > NFS4_FHSIZE)
848 READ_BUF(putfh->pf_fhlen);
849 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
855 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
859 READ_BUF(sizeof(stateid_t) + 12);
860 READ32(read->rd_stateid.si_generation);
861 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
862 READ64(read->rd_offset);
863 READ32(read->rd_length);
869 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
874 READ64(readdir->rd_cookie);
875 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
876 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
877 READ32(readdir->rd_maxcount);
878 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
885 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
890 READ32(remove->rm_namelen);
891 READ_BUF(remove->rm_namelen);
892 SAVEMEM(remove->rm_name, remove->rm_namelen);
893 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
900 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
905 READ32(rename->rn_snamelen);
906 READ_BUF(rename->rn_snamelen + 4);
907 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
908 READ32(rename->rn_tnamelen);
909 READ_BUF(rename->rn_tnamelen);
910 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
911 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
913 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
920 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
924 READ_BUF(sizeof(clientid_t));
925 COPYMEM(clientid, sizeof(clientid_t));
931 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
935 READ_BUF(sizeof(stateid_t));
936 READ32(setattr->sa_stateid.si_generation);
937 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
938 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
945 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
950 COPYMEM(setclientid->se_verf.data, 8);
951 READ32(setclientid->se_namelen);
953 READ_BUF(setclientid->se_namelen + 8);
954 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
955 READ32(setclientid->se_callback_prog);
956 READ32(setclientid->se_callback_netid_len);
958 READ_BUF(setclientid->se_callback_netid_len + 4);
959 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
960 READ32(setclientid->se_callback_addr_len);
962 READ_BUF(setclientid->se_callback_addr_len + 4);
963 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
964 READ32(setclientid->se_callback_ident);
970 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
974 READ_BUF(8 + sizeof(nfs4_verifier));
975 COPYMEM(&scd_c->sc_clientid, 8);
976 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
981 /* Also used for NVERIFY */
983 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
986 struct nfsd4_compoundargs save = {
989 .rqstp = argp->rqstp,
992 struct iattr ve_iattr; /* request */
993 struct nfs4_acl *ve_acl; /* request */
997 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1000 /* For convenience's sake, we compare raw xdr'd attributes in
1001 * nfsd4_proc_verify; however we still decode here just to return
1002 * correct error in case of bad xdr. */
1004 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
1005 if (status == nfserr_inval) {
1006 status = nfserrno(status);
1011 READ32(verify->ve_attrlen);
1012 READ_BUF(verify->ve_attrlen);
1013 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1019 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1026 READ_BUF(sizeof(stateid_opaque_t) + 20);
1027 READ32(write->wr_stateid.si_generation);
1028 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
1029 READ64(write->wr_offset);
1030 READ32(write->wr_stable_how);
1031 if (write->wr_stable_how > 2)
1033 READ32(write->wr_buflen);
1035 /* Sorry .. no magic macros for this.. *
1036 * READ_BUF(write->wr_buflen);
1037 * SAVEMEM(write->wr_buf, write->wr_buflen);
1039 avail = (char*)argp->end - (char*)argp->p;
1040 if (avail + argp->pagelen < write->wr_buflen) {
1041 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
1044 write->wr_vec[0].iov_base = p;
1045 write->wr_vec[0].iov_len = avail;
1047 len = write->wr_buflen;
1048 while (len > write->wr_vec[v].iov_len) {
1049 len -= write->wr_vec[v].iov_len;
1051 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
1053 if (argp->pagelen >= PAGE_SIZE) {
1054 write->wr_vec[v].iov_len = PAGE_SIZE;
1055 argp->pagelen -= PAGE_SIZE;
1057 write->wr_vec[v].iov_len = argp->pagelen;
1058 argp->pagelen -= len;
1061 argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
1062 argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1063 write->wr_vec[v].iov_len = len;
1064 write->wr_vlen = v+1;
1070 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1075 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1076 READ32(rlockowner->rl_owner.len);
1077 READ_BUF(rlockowner->rl_owner.len);
1078 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1084 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1087 struct nfsd4_op *op;
1091 * XXX: According to spec, we should check the tag
1092 * for UTF-8 compliance. I'm postponing this for
1093 * now because it seems that some clients do use
1097 READ32(argp->taglen);
1098 READ_BUF(argp->taglen + 8);
1099 SAVEMEM(argp->tag, argp->taglen);
1100 READ32(argp->minorversion);
1101 READ32(argp->opcnt);
1103 if (argp->taglen > NFSD4_MAX_TAGLEN)
1105 if (argp->opcnt > 100)
1108 if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) {
1109 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1111 argp->ops = argp->iops;
1112 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1117 for (i = 0; i < argp->opcnt; i++) {
1122 * We can't use READ_BUF() here because we need to handle
1123 * a missing opcode as an OP_WRITE + 1. So we need to check
1124 * to see if we're truly at the end of our buffer or if there
1125 * is another page we need to flip to.
1128 if (argp->p == argp->end) {
1129 if (argp->pagelen < 4) {
1130 /* There isn't an opcode still on the wire */
1131 op->opnum = OP_WRITE + 1;
1132 op->status = nfserr_bad_xdr;
1138 * False alarm. We just hit a page boundary, but there
1139 * is still data available. Move pointer across page
1140 * boundary. *snip from READ_BUF*
1142 argp->p = page_address(argp->pagelist[0]);
1144 if (argp->pagelen < PAGE_SIZE) {
1145 argp->end = p + (argp->pagelen>>2);
1148 argp->end = p + (PAGE_SIZE>>2);
1149 argp->pagelen -= PAGE_SIZE;
1152 op->opnum = ntohl(*argp->p++);
1154 switch (op->opnum) {
1155 case 2: /* Reserved operation */
1156 op->opnum = OP_ILLEGAL;
1157 if (argp->minorversion == 0)
1158 op->status = nfserr_op_illegal;
1160 op->status = nfserr_minor_vers_mismatch;
1163 op->status = nfsd4_decode_access(argp, &op->u.access);
1166 op->status = nfsd4_decode_close(argp, &op->u.close);
1169 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1172 op->status = nfsd4_decode_create(argp, &op->u.create);
1175 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1178 op->status = nfs_ok;
1181 op->status = nfsd4_decode_link(argp, &op->u.link);
1184 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1187 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1190 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1193 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1196 op->status = nfs_ok;
1199 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1202 op->status = nfsd4_decode_open(argp, &op->u.open);
1204 case OP_OPEN_CONFIRM:
1205 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1207 case OP_OPEN_DOWNGRADE:
1208 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1211 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1214 op->status = nfs_ok;
1217 op->status = nfsd4_decode_read(argp, &op->u.read);
1220 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1223 op->status = nfs_ok;
1226 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1229 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1232 op->status = nfs_ok;
1235 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1238 op->status = nfs_ok;
1241 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1243 case OP_SETCLIENTID:
1244 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1246 case OP_SETCLIENTID_CONFIRM:
1247 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1250 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1253 op->status = nfsd4_decode_write(argp, &op->u.write);
1255 case OP_RELEASE_LOCKOWNER:
1256 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1259 op->opnum = OP_ILLEGAL;
1260 op->status = nfserr_op_illegal;
1273 * END OF "GENERIC" DECODE ROUTINES.
1277 * START OF "GENERIC" ENCODE ROUTINES.
1278 * These may look a little ugly since they are imported from a "generic"
1279 * set of XDR encode/decode routines which are intended to be shared by
1280 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1282 * If the pain of reading these is too great, it should be a straightforward
1283 * task to translate them into Linux-specific versions which are more
1284 * consistent with the style used in NFSv2/v3...
1286 #define ENCODE_HEAD u32 *p
1288 #define WRITE32(n) *p++ = htonl(n)
1289 #define WRITE64(n) do { \
1290 *p++ = htonl((u32)((n) >> 32)); \
1291 *p++ = htonl((u32)(n)); \
1293 #define WRITEMEM(ptr,nbytes) do { \
1294 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1295 memcpy(p, ptr, nbytes); \
1296 p += XDR_QUADLEN(nbytes); \
1298 #define WRITECINFO(c) do { \
1299 *p++ = htonl(c.atomic); \
1300 *p++ = htonl(c.before_ctime_sec); \
1301 *p++ = htonl(c.before_ctime_nsec); \
1302 *p++ = htonl(c.after_ctime_sec); \
1303 *p++ = htonl(c.after_ctime_nsec); \
1306 #define RESERVE_SPACE(nbytes) do { \
1308 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1310 #define ADJUST_ARGS() resp->p = p
1313 * Header routine to setup seqid operation replay cache
1315 #define ENCODE_SEQID_OP_HEAD \
1322 * Routine for encoding the result of a
1323 * "seqid-mutating" NFSv4 operation. This is
1324 * where seqids are incremented, and the
1325 * replay cache is filled.
1328 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1329 if (seqid_mutating_err(nfserr) && stateowner) { \
1330 if (stateowner->so_confirmed) \
1331 stateowner->so_seqid++; \
1332 stateowner->so_replay.rp_status = nfserr; \
1333 stateowner->so_replay.rp_buflen = \
1334 (((char *)(resp)->p - (char *)save)); \
1335 memcpy(stateowner->so_replay.rp_buf, save, \
1336 stateowner->so_replay.rp_buflen); \
1340 static u32 nfs4_ftypes[16] = {
1341 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1342 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1343 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1344 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1348 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1349 u32 **p, int *buflen)
1353 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1354 return nfserr_resource;
1355 if (whotype != NFS4_ACL_WHO_NAMED)
1356 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1358 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1360 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1362 return nfserrno(status);
1363 *p = xdr_encode_opaque(*p, NULL, status);
1364 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1365 BUG_ON(*buflen < 0);
1370 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1372 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1376 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1378 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1382 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1383 u32 **p, int *buflen)
1385 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1390 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1393 * @countp is the buffer size in _words_; upon successful return this becomes
1394 * replaced with the number of words written.
1397 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1398 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1399 struct svc_rqst *rqstp)
1401 u32 bmval0 = bmval[0];
1402 u32 bmval1 = bmval[1];
1404 struct svc_fh tempfh;
1405 struct kstatfs statfs;
1406 int buflen = *countp << 2;
1413 struct nfs4_acl *acl = NULL;
1415 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1416 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1417 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1419 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1422 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1423 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1424 FATTR4_WORD1_SPACE_TOTAL))) {
1425 status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
1429 if ((bmval0 & FATTR4_WORD0_FILEHANDLE) && !fhp) {
1430 fh_init(&tempfh, NFS4_FHSIZE);
1431 status = fh_compose(&tempfh, exp, dentry, NULL);
1436 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1437 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1438 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1439 aclsupport = (status == 0);
1440 if (bmval0 & FATTR4_WORD0_ACL) {
1441 if (status == -EOPNOTSUPP)
1442 bmval0 &= ~FATTR4_WORD0_ACL;
1443 else if (status != 0)
1447 if ((buflen -= 16) < 0)
1453 attrlenp = p++; /* to be backfilled later */
1455 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1456 if ((buflen -= 12) < 0)
1459 WRITE32(aclsupport ?
1460 NFSD_SUPPORTED_ATTRS_WORD0 :
1461 NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1462 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1464 if (bmval0 & FATTR4_WORD0_TYPE) {
1465 if ((buflen -= 4) < 0)
1467 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1468 if (dummy == NF4BAD)
1469 goto out_serverfault;
1472 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1473 if ((buflen -= 4) < 0)
1475 WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME );
1477 if (bmval0 & FATTR4_WORD0_CHANGE) {
1479 * Note: This _must_ be consistent with the scheme for writing
1480 * change_info, so any changes made here must be reflected there
1481 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1484 if ((buflen -= 8) < 0)
1486 WRITE32(stat.ctime.tv_sec);
1487 WRITE32(stat.ctime.tv_nsec);
1489 if (bmval0 & FATTR4_WORD0_SIZE) {
1490 if ((buflen -= 8) < 0)
1494 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1495 if ((buflen -= 4) < 0)
1499 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1500 if ((buflen -= 4) < 0)
1504 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1505 if ((buflen -= 4) < 0)
1509 if (bmval0 & FATTR4_WORD0_FSID) {
1510 if ((buflen -= 16) < 0)
1513 WRITE32(MAJOR(stat.dev));
1515 WRITE32(MINOR(stat.dev));
1517 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1518 if ((buflen -= 4) < 0)
1522 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1523 if ((buflen -= 4) < 0)
1525 WRITE32(NFSD_LEASE_TIME);
1527 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1528 if ((buflen -= 4) < 0)
1532 if (bmval0 & FATTR4_WORD0_ACL) {
1533 struct nfs4_ace *ace;
1534 struct list_head *h;
1537 if ((buflen -= 4) < 0)
1543 if ((buflen -= 4) < 0)
1545 WRITE32(acl->naces);
1547 list_for_each(h, &acl->ace_head) {
1548 ace = list_entry(h, struct nfs4_ace, l_ace);
1550 if ((buflen -= 4*3) < 0)
1554 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1555 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1556 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1558 if (status == nfserr_resource)
1565 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1566 if ((buflen -= 4) < 0)
1568 WRITE32(aclsupport ?
1569 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1571 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1572 if ((buflen -= 4) < 0)
1576 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1577 if ((buflen -= 4) < 0)
1581 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1582 if ((buflen -= 4) < 0)
1586 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1587 if ((buflen -= 4) < 0)
1591 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1592 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1595 WRITE32(fhp->fh_handle.fh_size);
1596 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1598 if (bmval0 & FATTR4_WORD0_FILEID) {
1599 if ((buflen -= 8) < 0)
1601 WRITE64((u64) stat.ino);
1603 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1604 if ((buflen -= 8) < 0)
1606 WRITE64((u64) statfs.f_ffree);
1608 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1609 if ((buflen -= 8) < 0)
1611 WRITE64((u64) statfs.f_ffree);
1613 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1614 if ((buflen -= 8) < 0)
1616 WRITE64((u64) statfs.f_files);
1618 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1619 if ((buflen -= 4) < 0)
1623 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1624 if ((buflen -= 8) < 0)
1628 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1629 if ((buflen -= 4) < 0)
1633 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1634 if ((buflen -= 4) < 0)
1638 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1639 if ((buflen -= 8) < 0)
1641 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1643 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1644 if ((buflen -= 8) < 0)
1646 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1648 if (bmval1 & FATTR4_WORD1_MODE) {
1649 if ((buflen -= 4) < 0)
1651 WRITE32(stat.mode & S_IALLUGO);
1653 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1654 if ((buflen -= 4) < 0)
1658 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1659 if ((buflen -= 4) < 0)
1661 WRITE32(stat.nlink);
1663 if (bmval1 & FATTR4_WORD1_OWNER) {
1664 status = nfsd4_encode_user(rqstp,
1665 XIDINO_UID(XID_TAG(dentry->d_inode),
1666 stat.uid, stat.xid), &p, &buflen);
1667 if (status == nfserr_resource)
1672 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1673 status = nfsd4_encode_group(rqstp,
1674 XIDINO_GID(XID_TAG(dentry->d_inode),
1675 stat.gid, stat.xid), &p, &buflen);
1676 if (status == nfserr_resource)
1681 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1682 if ((buflen -= 8) < 0)
1684 WRITE32((u32) MAJOR(stat.rdev));
1685 WRITE32((u32) MINOR(stat.rdev));
1687 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1688 if ((buflen -= 8) < 0)
1690 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1693 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1694 if ((buflen -= 8) < 0)
1696 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1699 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1700 if ((buflen -= 8) < 0)
1702 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1705 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1706 if ((buflen -= 8) < 0)
1708 dummy64 = (u64)stat.blocks << 9;
1711 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1712 if ((buflen -= 12) < 0)
1715 WRITE32(stat.atime.tv_sec);
1716 WRITE32(stat.atime.tv_nsec);
1718 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1719 if ((buflen -= 12) < 0)
1725 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1726 if ((buflen -= 12) < 0)
1729 WRITE32(stat.ctime.tv_sec);
1730 WRITE32(stat.ctime.tv_nsec);
1732 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1733 if ((buflen -= 12) < 0)
1736 WRITE32(stat.mtime.tv_sec);
1737 WRITE32(stat.mtime.tv_nsec);
1739 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1740 struct dentry *mnt_pnt, *mnt_root;
1742 if ((buflen -= 8) < 0)
1744 mnt_root = exp->ex_mnt->mnt_root;
1745 if (mnt_root->d_inode == dentry->d_inode) {
1746 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1747 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1749 WRITE64((u64) stat.ino);
1751 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1752 *countp = p - buffer;
1761 status = nfserrno(status);
1765 status = nfserr_resource;
1768 status = nfserr_serverfault;
1773 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1774 loff_t offset, ino_t ino, unsigned int d_type)
1776 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1778 u32 *p = cd->buffer;
1780 struct dentry *dentry;
1781 struct svc_export *exp = cd->rd_fhp->fh_export;
1785 /* In nfsv4, "." and ".." never make it onto the wire.. */
1786 if (name && isdotent(name, namlen)) {
1787 cd->common.err = nfs_ok;
1792 xdr_encode_hyper(cd->offset, (u64) offset);
1794 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1798 *p++ = xdr_one; /* mark entry present */
1799 cd->offset = p; /* remember pointer */
1800 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1801 p = xdr_encode_array(p, name, namlen); /* name length & name */
1804 * Now we come to the ugly part: writing the fattr for this entry.
1806 bmval0 = cd->rd_bmval[0];
1807 bmval1 = cd->rd_bmval[1];
1808 if ((bmval0 & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_FILEID)) || bmval1) {
1810 * "Heavyweight" case: we have no choice except to
1811 * call nfsd4_encode_fattr().
1813 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1814 if (IS_ERR(dentry)) {
1815 nfserr = nfserrno(PTR_ERR(dentry));
1820 if (d_mountpoint(dentry)) {
1821 if ((nfserr = nfsd_cross_mnt(cd->rd_rqstp, &dentry,
1824 * -EAGAIN is the only error returned from
1825 * nfsd_cross_mnt() and it indicates that an
1826 * up-call has been initiated to fill in the export
1827 * options on exp. When the answer comes back,
1828 * this call will be retried.
1832 nfserr = nfserr_dropit;
1838 nfserr = nfsd4_encode_fattr(NULL, exp,
1839 dentry, p, &buflen, cd->rd_bmval,
1847 if (nfserr == nfserr_resource)
1852 * If we get here, we experienced a miscellaneous
1853 * failure while writing the attributes. If the
1854 * client requested the RDATTR_ERROR attribute,
1855 * we stuff the error code into this attribute
1856 * and continue. If this attribute was not requested,
1857 * then in accordance with the spec, we fail the
1858 * entire READDIR operation(!)
1860 if (!(bmval0 & FATTR4_WORD0_RDATTR_ERROR)) {
1861 cd->common.err = nfserr;
1865 bmval0 = FATTR4_WORD0_RDATTR_ERROR;
1867 /* falling through here will do the right thing... */
1871 * In the common "lightweight" case, we avoid
1872 * the overhead of nfsd4_encode_fattr() by assembling
1873 * a small fattr by hand.
1878 *p++ = htonl(bmval0);
1879 *p++ = htonl(bmval1);
1882 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR)
1883 *p++ = nfserr; /* no htonl */
1884 if (bmval0 & FATTR4_WORD0_FILEID)
1885 p = xdr_encode_hyper(p, (u64)ino);
1886 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1889 cd->buflen -= (p - cd->buffer);
1891 cd->common.err = nfs_ok;
1895 cd->common.err = nfserr_toosmall;
1900 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1906 WRITE32(access->ac_supported);
1907 WRITE32(access->ac_resp_access);
1913 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1915 ENCODE_SEQID_OP_HEAD;
1918 RESERVE_SPACE(sizeof(stateid_t));
1919 WRITE32(close->cl_stateid.si_generation);
1920 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1923 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1928 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1934 WRITEMEM(commit->co_verf.data, 8);
1940 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1946 WRITECINFO(create->cr_cinfo);
1948 WRITE32(create->cr_bmval[0]);
1949 WRITE32(create->cr_bmval[1]);
1955 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1957 struct svc_fh *fhp = getattr->ga_fhp;
1963 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1964 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1965 resp->p, &buflen, getattr->ga_bmval,
1974 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1980 len = fhp->fh_handle.fh_size;
1981 RESERVE_SPACE(len + 4);
1983 WRITEMEM(&fhp->fh_handle.fh_base, len);
1989 * Including all fields other than the name, a LOCK4denied structure requires
1990 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1993 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1997 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
1998 WRITE64(ld->ld_start);
1999 WRITE64(ld->ld_length);
2000 WRITE32(ld->ld_type);
2002 WRITEMEM(&ld->ld_clientid, 8);
2003 WRITE32(ld->ld_sop->so_owner.len);
2004 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2005 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2006 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2007 WRITE64((u64)0); /* clientid */
2008 WRITE32(0); /* length of owner name */
2014 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
2017 ENCODE_SEQID_OP_HEAD;
2020 RESERVE_SPACE(4 + sizeof(stateid_t));
2021 WRITE32(lock->lk_resp_stateid.si_generation);
2022 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2024 } else if (nfserr == nfserr_denied)
2025 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2027 ENCODE_SEQID_OP_TAIL(lock->lk_stateowner);
2031 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
2033 if (nfserr == nfserr_denied)
2034 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2038 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
2040 ENCODE_SEQID_OP_HEAD;
2043 RESERVE_SPACE(sizeof(stateid_t));
2044 WRITE32(locku->lu_stateid.si_generation);
2045 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2049 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2054 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
2060 WRITECINFO(link->li_cinfo);
2067 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
2069 ENCODE_SEQID_OP_HEAD;
2074 RESERVE_SPACE(36 + sizeof(stateid_t));
2075 WRITE32(open->op_stateid.si_generation);
2076 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2077 WRITECINFO(open->op_cinfo);
2078 WRITE32(open->op_rflags);
2080 WRITE32(open->op_bmval[0]);
2081 WRITE32(open->op_bmval[1]);
2082 WRITE32(open->op_delegate_type);
2085 switch (open->op_delegate_type) {
2086 case NFS4_OPEN_DELEGATE_NONE:
2088 case NFS4_OPEN_DELEGATE_READ:
2089 RESERVE_SPACE(20 + sizeof(delegation_stateid_t));
2090 WRITEMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
2094 * TODO: ACE's in delegations
2096 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2099 WRITE32(0); /* XXX: is NULL principal ok? */
2102 case NFS4_OPEN_DELEGATE_WRITE:
2103 RESERVE_SPACE(32 + sizeof(delegation_stateid_t));
2104 WRITEMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
2108 * TODO: space_limit's in delegations
2110 WRITE32(NFS4_LIMIT_SIZE);
2115 * TODO: ACE's in delegations
2117 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2120 WRITE32(0); /* XXX: is NULL principal ok? */
2126 /* XXX save filehandle here */
2128 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2132 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2134 ENCODE_SEQID_OP_HEAD;
2137 RESERVE_SPACE(sizeof(stateid_t));
2138 WRITE32(oc->oc_resp_stateid.si_generation);
2139 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2143 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2147 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2149 ENCODE_SEQID_OP_HEAD;
2152 RESERVE_SPACE(sizeof(stateid_t));
2153 WRITE32(od->od_stateid.si_generation);
2154 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2158 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2162 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2166 unsigned long maxcount;
2172 if (resp->xbuf->page_len)
2173 return nfserr_resource;
2175 RESERVE_SPACE(8); /* eof flag and byte count */
2177 maxcount = NFSSVC_MAXBLKSIZE;
2178 if (maxcount > read->rd_length)
2179 maxcount = read->rd_length;
2184 pn = resp->rqstp->rq_resused;
2185 svc_take_page(resp->rqstp);
2186 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2187 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2193 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp,
2195 read->rd_iov, read->rd_vlen,
2197 if (nfserr == nfserr_symlink)
2198 nfserr = nfserr_inval;
2201 eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2206 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2208 resp->xbuf->page_len = maxcount;
2210 /* read zero bytes -> don't set up tail */
2214 /* set up page for remaining responses */
2215 svc_take_page(resp->rqstp);
2216 resp->xbuf->tail[0].iov_base =
2217 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2218 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2219 resp->xbuf->tail[0].iov_len = 0;
2220 resp->p = resp->xbuf->tail[0].iov_base;
2221 resp->end = resp->p + PAGE_SIZE/4;
2225 resp->xbuf->tail[0].iov_base += maxcount&3;
2226 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2232 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2240 if (resp->xbuf->page_len)
2241 return nfserr_resource;
2243 svc_take_page(resp->rqstp);
2244 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2246 maxcount = PAGE_SIZE;
2250 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2251 * if they would overflow the buffer. Is this kosher in NFSv4? If
2252 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2253 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2255 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2256 if (nfserr == nfserr_isdir)
2257 return nfserr_inval;
2263 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2265 svc_take_page(resp->rqstp);
2266 resp->xbuf->tail[0].iov_base =
2267 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2268 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2269 resp->xbuf->tail[0].iov_len = 0;
2270 resp->p = resp->xbuf->tail[0].iov_base;
2271 resp->end = resp->p + PAGE_SIZE/4;
2273 resp->xbuf->page_len = maxcount;
2276 resp->xbuf->tail[0].iov_base += maxcount&3;
2277 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2283 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2292 if (resp->xbuf->page_len)
2293 return nfserr_resource;
2295 RESERVE_SPACE(8); /* verifier */
2298 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2302 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2304 maxcount = PAGE_SIZE;
2305 if (maxcount > readdir->rd_maxcount)
2306 maxcount = readdir->rd_maxcount;
2309 * Convert from bytes to words, account for the two words already
2310 * written, make sure to leave two words at the end for the next
2311 * pointer and eof field.
2313 maxcount = (maxcount >> 2) - 4;
2315 nfserr = nfserr_toosmall;
2319 svc_take_page(resp->rqstp);
2320 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2321 readdir->common.err = 0;
2322 readdir->buflen = maxcount;
2323 readdir->buffer = page;
2324 readdir->offset = NULL;
2326 offset = readdir->rd_cookie;
2327 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2329 &readdir->common, nfsd4_encode_dirent);
2330 if (nfserr == nfs_ok &&
2331 readdir->common.err == nfserr_toosmall &&
2332 readdir->buffer == page)
2333 nfserr = nfserr_toosmall;
2334 if (nfserr == nfserr_symlink)
2335 nfserr = nfserr_notdir;
2339 if (readdir->offset)
2340 xdr_encode_hyper(readdir->offset, offset);
2342 p = readdir->buffer;
2343 *p++ = 0; /* no more entries */
2344 *p++ = htonl(readdir->common.err == nfserr_eof);
2345 resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2347 /* allocate a page for the tail */
2348 svc_take_page(resp->rqstp);
2349 resp->xbuf->tail[0].iov_base =
2350 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2351 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2352 resp->xbuf->tail[0].iov_len = 0;
2353 resp->p = resp->xbuf->tail[0].iov_base;
2354 resp->end = resp->p + PAGE_SIZE/4;
2364 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2370 WRITECINFO(remove->rm_cinfo);
2376 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2382 WRITECINFO(rename->rn_sinfo);
2383 WRITECINFO(rename->rn_tinfo);
2389 * The SETATTR encode routine is special -- it always encodes a bitmap,
2390 * regardless of the error status.
2393 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2405 WRITE32(setattr->sa_bmval[0]);
2406 WRITE32(setattr->sa_bmval[1]);
2412 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2417 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2418 WRITEMEM(&scd->se_clientid, 8);
2419 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2422 else if (nfserr == nfserr_clid_inuse) {
2431 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2437 WRITE32(write->wr_bytes_written);
2438 WRITE32(write->wr_how_written);
2439 WRITEMEM(write->wr_verifier.data, 8);
2445 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2452 statp = p++; /* to be backfilled at the end */
2455 switch (op->opnum) {
2457 nfsd4_encode_access(resp, op->status, &op->u.access);
2460 nfsd4_encode_close(resp, op->status, &op->u.close);
2463 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2466 nfsd4_encode_create(resp, op->status, &op->u.create);
2469 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2472 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2475 nfsd4_encode_link(resp, op->status, &op->u.link);
2478 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2481 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2484 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2493 nfsd4_encode_open(resp, op->status, &op->u.open);
2495 case OP_OPEN_CONFIRM:
2496 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2498 case OP_OPEN_DOWNGRADE:
2499 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2506 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2509 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2512 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2515 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2518 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2527 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2529 case OP_SETCLIENTID:
2530 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2532 case OP_SETCLIENTID_CONFIRM:
2537 nfsd4_encode_write(resp, op->status, &op->u.write);
2539 case OP_RELEASE_LOCKOWNER:
2546 * Note: We write the status directly, instead of using WRITE32(),
2547 * since it is already in network byte order.
2549 *statp = op->status;
2553 * Encode the reply stored in the stateowner reply cache
2555 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2556 * previously sent already encoded operation.
2558 * called with nfs4_lock_state() held
2561 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2564 struct nfs4_replay *rp = op->replay;
2570 *p++ = rp->rp_status; /* already xdr'ed */
2573 RESERVE_SPACE(rp->rp_buflen);
2574 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2579 * END OF "GENERIC" ENCODE ROUTINES.
2583 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2585 return xdr_ressize_check(rqstp, p);
2588 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2590 if (args->ops != args->iops) {
2592 args->ops = args->iops;
2598 while (args->to_free) {
2599 struct tmpbuf *tb = args->to_free;
2600 args->to_free = tb->next;
2601 tb->release(tb->buf);
2607 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2612 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2613 args->pagelist = rqstp->rq_arg.pages;
2614 args->pagelen = rqstp->rq_arg.page_len;
2616 args->to_free = NULL;
2617 args->ops = args->iops;
2618 args->rqstp = rqstp;
2620 status = nfsd4_decode_compound(args);
2622 nfsd4_release_compoundargs(args);
2628 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2631 * All that remains is to write the tag and operation count...
2635 *p++ = htonl(resp->taglen);
2636 memcpy(p, resp->tag, resp->taglen);
2637 p += XDR_QUADLEN(resp->taglen);
2638 *p++ = htonl(resp->opcnt);
2640 if (rqstp->rq_res.page_len)
2641 iov = &rqstp->rq_res.tail[0];
2643 iov = &rqstp->rq_res.head[0];
2644 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2645 BUG_ON(iov->iov_len > PAGE_SIZE);