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_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
623 READ_BUF(sizeof(stateid_t));
624 READ32(dr->dr_stateid.si_generation);
625 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
631 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
633 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
637 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
642 READ32(link->li_namelen);
643 READ_BUF(link->li_namelen);
644 SAVEMEM(link->li_name, link->li_namelen);
645 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
652 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
656 lock->lk_stateowner = NULL;
658 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
661 READ32(lock->lk_type);
662 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
664 READ32(lock->lk_reclaim);
665 READ64(lock->lk_offset);
666 READ64(lock->lk_length);
667 READ32(lock->lk_is_new);
669 if (lock->lk_is_new) {
671 READ32(lock->lk_new_open_seqid);
672 READ32(lock->lk_new_open_stateid.si_generation);
674 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
675 READ32(lock->lk_new_lock_seqid);
676 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
677 READ32(lock->lk_new_owner.len);
678 READ_BUF(lock->lk_new_owner.len);
679 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
682 READ32(lock->lk_old_lock_stateid.si_generation);
683 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
684 READ32(lock->lk_old_lock_seqid);
691 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
696 READ32(lockt->lt_type);
697 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
699 READ64(lockt->lt_offset);
700 READ64(lockt->lt_length);
701 COPYMEM(&lockt->lt_clientid, 8);
702 READ32(lockt->lt_owner.len);
703 READ_BUF(lockt->lt_owner.len);
704 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
710 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
714 locku->lu_stateowner = NULL;
715 READ_BUF(24 + sizeof(stateid_t));
716 READ32(locku->lu_type);
717 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
719 READ32(locku->lu_seqid);
720 READ32(locku->lu_stateid.si_generation);
721 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
722 READ64(locku->lu_offset);
723 READ64(locku->lu_length);
729 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
734 READ32(lookup->lo_len);
735 READ_BUF(lookup->lo_len);
736 SAVEMEM(lookup->lo_name, lookup->lo_len);
737 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
744 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
748 memset(open->op_bmval, 0, sizeof(open->op_bmval));
749 open->op_iattr.ia_valid = 0;
750 open->op_stateowner = NULL;
752 /* seqid, share_access, share_deny, clientid, ownerlen */
753 READ_BUF(16 + sizeof(clientid_t));
754 READ32(open->op_seqid);
755 READ32(open->op_share_access);
756 READ32(open->op_share_deny);
757 COPYMEM(&open->op_clientid, sizeof(clientid_t));
758 READ32(open->op_owner.len);
760 /* owner, open_flag */
761 READ_BUF(open->op_owner.len + 4);
762 SAVEMEM(open->op_owner.data, open->op_owner.len);
763 READ32(open->op_create);
764 switch (open->op_create) {
765 case NFS4_OPEN_NOCREATE:
767 case NFS4_OPEN_CREATE:
769 READ32(open->op_createmode);
770 switch (open->op_createmode) {
771 case NFS4_CREATE_UNCHECKED:
772 case NFS4_CREATE_GUARDED:
773 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
776 case NFS4_CREATE_EXCLUSIVE:
778 COPYMEM(open->op_verf.data, 8);
790 READ32(open->op_claim_type);
791 switch (open->op_claim_type) {
792 case NFS4_OPEN_CLAIM_NULL:
793 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
795 READ32(open->op_fname.len);
796 READ_BUF(open->op_fname.len);
797 SAVEMEM(open->op_fname.data, open->op_fname.len);
798 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
801 case NFS4_OPEN_CLAIM_PREVIOUS:
803 READ32(open->op_delegate_type);
805 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
806 READ_BUF(sizeof(stateid_t) + 4);
807 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
808 READ32(open->op_fname.len);
809 READ_BUF(open->op_fname.len);
810 SAVEMEM(open->op_fname.data, open->op_fname.len);
811 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
822 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
826 open_conf->oc_stateowner = NULL;
827 READ_BUF(4 + sizeof(stateid_t));
828 READ32(open_conf->oc_req_stateid.si_generation);
829 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
830 READ32(open_conf->oc_seqid);
836 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
840 open_down->od_stateowner = NULL;
841 READ_BUF(12 + sizeof(stateid_t));
842 READ32(open_down->od_stateid.si_generation);
843 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
844 READ32(open_down->od_seqid);
845 READ32(open_down->od_share_access);
846 READ32(open_down->od_share_deny);
852 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
857 READ32(putfh->pf_fhlen);
858 if (putfh->pf_fhlen > NFS4_FHSIZE)
860 READ_BUF(putfh->pf_fhlen);
861 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
867 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
871 READ_BUF(sizeof(stateid_t) + 12);
872 READ32(read->rd_stateid.si_generation);
873 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
874 READ64(read->rd_offset);
875 READ32(read->rd_length);
881 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
886 READ64(readdir->rd_cookie);
887 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
888 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
889 READ32(readdir->rd_maxcount);
890 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
897 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
902 READ32(remove->rm_namelen);
903 READ_BUF(remove->rm_namelen);
904 SAVEMEM(remove->rm_name, remove->rm_namelen);
905 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
912 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
917 READ32(rename->rn_snamelen);
918 READ_BUF(rename->rn_snamelen + 4);
919 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
920 READ32(rename->rn_tnamelen);
921 READ_BUF(rename->rn_tnamelen);
922 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
923 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
925 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
932 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
936 READ_BUF(sizeof(clientid_t));
937 COPYMEM(clientid, sizeof(clientid_t));
943 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
947 READ_BUF(sizeof(stateid_t));
948 READ32(setattr->sa_stateid.si_generation);
949 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
950 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
957 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
962 COPYMEM(setclientid->se_verf.data, 8);
963 READ32(setclientid->se_namelen);
965 READ_BUF(setclientid->se_namelen + 8);
966 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
967 READ32(setclientid->se_callback_prog);
968 READ32(setclientid->se_callback_netid_len);
970 READ_BUF(setclientid->se_callback_netid_len + 4);
971 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
972 READ32(setclientid->se_callback_addr_len);
974 READ_BUF(setclientid->se_callback_addr_len + 4);
975 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
976 READ32(setclientid->se_callback_ident);
982 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
986 READ_BUF(8 + sizeof(nfs4_verifier));
987 COPYMEM(&scd_c->sc_clientid, 8);
988 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
993 /* Also used for NVERIFY */
995 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
998 struct nfsd4_compoundargs save = {
1001 .rqstp = argp->rqstp,
1004 struct iattr ve_iattr; /* request */
1005 struct nfs4_acl *ve_acl; /* request */
1009 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1012 /* For convenience's sake, we compare raw xdr'd attributes in
1013 * nfsd4_proc_verify; however we still decode here just to return
1014 * correct error in case of bad xdr. */
1016 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
1017 if (status == nfserr_inval) {
1018 status = nfserrno(status);
1023 READ32(verify->ve_attrlen);
1024 READ_BUF(verify->ve_attrlen);
1025 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1031 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1038 READ_BUF(sizeof(stateid_opaque_t) + 20);
1039 READ32(write->wr_stateid.si_generation);
1040 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
1041 READ64(write->wr_offset);
1042 READ32(write->wr_stable_how);
1043 if (write->wr_stable_how > 2)
1045 READ32(write->wr_buflen);
1047 /* Sorry .. no magic macros for this.. *
1048 * READ_BUF(write->wr_buflen);
1049 * SAVEMEM(write->wr_buf, write->wr_buflen);
1051 avail = (char*)argp->end - (char*)argp->p;
1052 if (avail + argp->pagelen < write->wr_buflen) {
1053 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
1056 write->wr_vec[0].iov_base = p;
1057 write->wr_vec[0].iov_len = avail;
1059 len = write->wr_buflen;
1060 while (len > write->wr_vec[v].iov_len) {
1061 len -= write->wr_vec[v].iov_len;
1063 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
1065 if (argp->pagelen >= PAGE_SIZE) {
1066 write->wr_vec[v].iov_len = PAGE_SIZE;
1067 argp->pagelen -= PAGE_SIZE;
1069 write->wr_vec[v].iov_len = argp->pagelen;
1070 argp->pagelen -= len;
1073 argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
1074 argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1075 write->wr_vec[v].iov_len = len;
1076 write->wr_vlen = v+1;
1082 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1087 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1088 READ32(rlockowner->rl_owner.len);
1089 READ_BUF(rlockowner->rl_owner.len);
1090 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1096 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1099 struct nfsd4_op *op;
1103 * XXX: According to spec, we should check the tag
1104 * for UTF-8 compliance. I'm postponing this for
1105 * now because it seems that some clients do use
1109 READ32(argp->taglen);
1110 READ_BUF(argp->taglen + 8);
1111 SAVEMEM(argp->tag, argp->taglen);
1112 READ32(argp->minorversion);
1113 READ32(argp->opcnt);
1115 if (argp->taglen > NFSD4_MAX_TAGLEN)
1117 if (argp->opcnt > 100)
1120 if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) {
1121 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1123 argp->ops = argp->iops;
1124 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1129 for (i = 0; i < argp->opcnt; i++) {
1134 * We can't use READ_BUF() here because we need to handle
1135 * a missing opcode as an OP_WRITE + 1. So we need to check
1136 * to see if we're truly at the end of our buffer or if there
1137 * is another page we need to flip to.
1140 if (argp->p == argp->end) {
1141 if (argp->pagelen < 4) {
1142 /* There isn't an opcode still on the wire */
1143 op->opnum = OP_WRITE + 1;
1144 op->status = nfserr_bad_xdr;
1150 * False alarm. We just hit a page boundary, but there
1151 * is still data available. Move pointer across page
1152 * boundary. *snip from READ_BUF*
1154 argp->p = page_address(argp->pagelist[0]);
1156 if (argp->pagelen < PAGE_SIZE) {
1157 argp->end = p + (argp->pagelen>>2);
1160 argp->end = p + (PAGE_SIZE>>2);
1161 argp->pagelen -= PAGE_SIZE;
1164 op->opnum = ntohl(*argp->p++);
1166 switch (op->opnum) {
1167 case 2: /* Reserved operation */
1168 op->opnum = OP_ILLEGAL;
1169 if (argp->minorversion == 0)
1170 op->status = nfserr_op_illegal;
1172 op->status = nfserr_minor_vers_mismatch;
1175 op->status = nfsd4_decode_access(argp, &op->u.access);
1178 op->status = nfsd4_decode_close(argp, &op->u.close);
1181 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1184 op->status = nfsd4_decode_create(argp, &op->u.create);
1186 case OP_DELEGRETURN:
1187 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1190 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1193 op->status = nfs_ok;
1196 op->status = nfsd4_decode_link(argp, &op->u.link);
1199 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1202 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1205 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1208 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1211 op->status = nfs_ok;
1214 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1217 op->status = nfsd4_decode_open(argp, &op->u.open);
1219 case OP_OPEN_CONFIRM:
1220 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1222 case OP_OPEN_DOWNGRADE:
1223 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1226 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1229 op->status = nfs_ok;
1232 op->status = nfsd4_decode_read(argp, &op->u.read);
1235 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1238 op->status = nfs_ok;
1241 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1244 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1247 op->status = nfs_ok;
1250 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1253 op->status = nfs_ok;
1256 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1258 case OP_SETCLIENTID:
1259 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1261 case OP_SETCLIENTID_CONFIRM:
1262 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1265 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1268 op->status = nfsd4_decode_write(argp, &op->u.write);
1270 case OP_RELEASE_LOCKOWNER:
1271 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1274 op->opnum = OP_ILLEGAL;
1275 op->status = nfserr_op_illegal;
1288 * END OF "GENERIC" DECODE ROUTINES.
1292 * START OF "GENERIC" ENCODE ROUTINES.
1293 * These may look a little ugly since they are imported from a "generic"
1294 * set of XDR encode/decode routines which are intended to be shared by
1295 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1297 * If the pain of reading these is too great, it should be a straightforward
1298 * task to translate them into Linux-specific versions which are more
1299 * consistent with the style used in NFSv2/v3...
1301 #define ENCODE_HEAD u32 *p
1303 #define WRITE32(n) *p++ = htonl(n)
1304 #define WRITE64(n) do { \
1305 *p++ = htonl((u32)((n) >> 32)); \
1306 *p++ = htonl((u32)(n)); \
1308 #define WRITEMEM(ptr,nbytes) do { \
1309 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1310 memcpy(p, ptr, nbytes); \
1311 p += XDR_QUADLEN(nbytes); \
1313 #define WRITECINFO(c) do { \
1314 *p++ = htonl(c.atomic); \
1315 *p++ = htonl(c.before_ctime_sec); \
1316 *p++ = htonl(c.before_ctime_nsec); \
1317 *p++ = htonl(c.after_ctime_sec); \
1318 *p++ = htonl(c.after_ctime_nsec); \
1321 #define RESERVE_SPACE(nbytes) do { \
1323 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1325 #define ADJUST_ARGS() resp->p = p
1328 * Header routine to setup seqid operation replay cache
1330 #define ENCODE_SEQID_OP_HEAD \
1337 * Routine for encoding the result of a
1338 * "seqid-mutating" NFSv4 operation. This is
1339 * where seqids are incremented, and the
1340 * replay cache is filled.
1343 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1344 if (seqid_mutating_err(nfserr) && stateowner) { \
1345 if (stateowner->so_confirmed) \
1346 stateowner->so_seqid++; \
1347 stateowner->so_replay.rp_status = nfserr; \
1348 stateowner->so_replay.rp_buflen = \
1349 (((char *)(resp)->p - (char *)save)); \
1350 memcpy(stateowner->so_replay.rp_buf, save, \
1351 stateowner->so_replay.rp_buflen); \
1355 static u32 nfs4_ftypes[16] = {
1356 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1357 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1358 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1359 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1363 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1364 u32 **p, int *buflen)
1368 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1369 return nfserr_resource;
1370 if (whotype != NFS4_ACL_WHO_NAMED)
1371 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1373 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1375 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1377 return nfserrno(status);
1378 *p = xdr_encode_opaque(*p, NULL, status);
1379 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1380 BUG_ON(*buflen < 0);
1385 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1387 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1391 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1393 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1397 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1398 u32 **p, int *buflen)
1400 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1405 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1408 * @countp is the buffer size in _words_; upon successful return this becomes
1409 * replaced with the number of words written.
1412 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1413 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1414 struct svc_rqst *rqstp)
1416 u32 bmval0 = bmval[0];
1417 u32 bmval1 = bmval[1];
1419 struct svc_fh tempfh;
1420 struct kstatfs statfs;
1421 int buflen = *countp << 2;
1428 struct nfs4_acl *acl = NULL;
1430 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1431 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1432 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1434 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1437 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1438 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1439 FATTR4_WORD1_SPACE_TOTAL))) {
1440 status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
1444 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1445 fh_init(&tempfh, NFS4_FHSIZE);
1446 status = fh_compose(&tempfh, exp, dentry, NULL);
1451 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1452 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1453 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1454 aclsupport = (status == 0);
1455 if (bmval0 & FATTR4_WORD0_ACL) {
1456 if (status == -EOPNOTSUPP)
1457 bmval0 &= ~FATTR4_WORD0_ACL;
1458 else if (status != 0)
1462 if ((buflen -= 16) < 0)
1468 attrlenp = p++; /* to be backfilled later */
1470 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1471 if ((buflen -= 12) < 0)
1474 WRITE32(aclsupport ?
1475 NFSD_SUPPORTED_ATTRS_WORD0 :
1476 NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1477 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1479 if (bmval0 & FATTR4_WORD0_TYPE) {
1480 if ((buflen -= 4) < 0)
1482 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1483 if (dummy == NF4BAD)
1484 goto out_serverfault;
1487 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1488 if ((buflen -= 4) < 0)
1490 WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME );
1492 if (bmval0 & FATTR4_WORD0_CHANGE) {
1494 * Note: This _must_ be consistent with the scheme for writing
1495 * change_info, so any changes made here must be reflected there
1496 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1499 if ((buflen -= 8) < 0)
1501 WRITE32(stat.ctime.tv_sec);
1502 WRITE32(stat.ctime.tv_nsec);
1504 if (bmval0 & FATTR4_WORD0_SIZE) {
1505 if ((buflen -= 8) < 0)
1509 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1510 if ((buflen -= 4) < 0)
1514 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1515 if ((buflen -= 4) < 0)
1519 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1520 if ((buflen -= 4) < 0)
1524 if (bmval0 & FATTR4_WORD0_FSID) {
1525 if ((buflen -= 16) < 0)
1527 if (is_fsid(fhp, rqstp->rq_reffh)) {
1528 WRITE64((u64)exp->ex_fsid);
1532 WRITE32(MAJOR(stat.dev));
1534 WRITE32(MINOR(stat.dev));
1537 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1538 if ((buflen -= 4) < 0)
1542 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1543 if ((buflen -= 4) < 0)
1545 WRITE32(NFSD_LEASE_TIME);
1547 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1548 if ((buflen -= 4) < 0)
1552 if (bmval0 & FATTR4_WORD0_ACL) {
1553 struct nfs4_ace *ace;
1554 struct list_head *h;
1557 if ((buflen -= 4) < 0)
1563 if ((buflen -= 4) < 0)
1565 WRITE32(acl->naces);
1567 list_for_each(h, &acl->ace_head) {
1568 ace = list_entry(h, struct nfs4_ace, l_ace);
1570 if ((buflen -= 4*3) < 0)
1574 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1575 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1576 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1578 if (status == nfserr_resource)
1585 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1586 if ((buflen -= 4) < 0)
1588 WRITE32(aclsupport ?
1589 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1591 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1592 if ((buflen -= 4) < 0)
1596 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1597 if ((buflen -= 4) < 0)
1601 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1602 if ((buflen -= 4) < 0)
1606 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1607 if ((buflen -= 4) < 0)
1611 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1612 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1615 WRITE32(fhp->fh_handle.fh_size);
1616 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1618 if (bmval0 & FATTR4_WORD0_FILEID) {
1619 if ((buflen -= 8) < 0)
1621 WRITE64((u64) stat.ino);
1623 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1624 if ((buflen -= 8) < 0)
1626 WRITE64((u64) statfs.f_ffree);
1628 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1629 if ((buflen -= 8) < 0)
1631 WRITE64((u64) statfs.f_ffree);
1633 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1634 if ((buflen -= 8) < 0)
1636 WRITE64((u64) statfs.f_files);
1638 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1639 if ((buflen -= 4) < 0)
1643 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1644 if ((buflen -= 8) < 0)
1648 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1649 if ((buflen -= 4) < 0)
1653 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1654 if ((buflen -= 4) < 0)
1658 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1659 if ((buflen -= 8) < 0)
1661 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1663 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1664 if ((buflen -= 8) < 0)
1666 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1668 if (bmval1 & FATTR4_WORD1_MODE) {
1669 if ((buflen -= 4) < 0)
1671 WRITE32(stat.mode & S_IALLUGO);
1673 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1674 if ((buflen -= 4) < 0)
1678 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1679 if ((buflen -= 4) < 0)
1681 WRITE32(stat.nlink);
1683 if (bmval1 & FATTR4_WORD1_OWNER) {
1684 status = nfsd4_encode_user(rqstp,
1685 XIDINO_UID(XID_TAG(dentry->d_inode),
1686 stat.uid, stat.xid), &p, &buflen);
1687 if (status == nfserr_resource)
1692 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1693 status = nfsd4_encode_group(rqstp,
1694 XIDINO_GID(XID_TAG(dentry->d_inode),
1695 stat.gid, stat.xid), &p, &buflen);
1696 if (status == nfserr_resource)
1701 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1702 if ((buflen -= 8) < 0)
1704 WRITE32((u32) MAJOR(stat.rdev));
1705 WRITE32((u32) MINOR(stat.rdev));
1707 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1708 if ((buflen -= 8) < 0)
1710 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1713 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1714 if ((buflen -= 8) < 0)
1716 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1719 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1720 if ((buflen -= 8) < 0)
1722 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1725 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1726 if ((buflen -= 8) < 0)
1728 dummy64 = (u64)stat.blocks << 9;
1731 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1732 if ((buflen -= 12) < 0)
1735 WRITE32(stat.atime.tv_sec);
1736 WRITE32(stat.atime.tv_nsec);
1738 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1739 if ((buflen -= 12) < 0)
1745 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1746 if ((buflen -= 12) < 0)
1749 WRITE32(stat.ctime.tv_sec);
1750 WRITE32(stat.ctime.tv_nsec);
1752 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1753 if ((buflen -= 12) < 0)
1756 WRITE32(stat.mtime.tv_sec);
1757 WRITE32(stat.mtime.tv_nsec);
1759 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1760 struct dentry *mnt_pnt, *mnt_root;
1762 if ((buflen -= 8) < 0)
1764 mnt_root = exp->ex_mnt->mnt_root;
1765 if (mnt_root->d_inode == dentry->d_inode) {
1766 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1767 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1769 WRITE64((u64) stat.ino);
1771 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1772 *countp = p - buffer;
1781 status = nfserrno(status);
1785 status = nfserr_resource;
1788 status = nfserr_serverfault;
1793 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1794 const char *name, int namlen, u32 *p, int *buflen)
1796 struct svc_export *exp = cd->rd_fhp->fh_export;
1797 struct dentry *dentry;
1800 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1802 return nfserrno(PTR_ERR(dentry));
1805 if (d_mountpoint(dentry)) {
1806 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1808 * -EAGAIN is the only error returned from
1809 * nfsd_cross_mnt() and it indicates that an
1810 * up-call has been initiated to fill in the export
1811 * options on exp. When the answer comes back,
1812 * this call will be retried.
1814 nfserr = nfserr_dropit;
1819 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1828 nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
1835 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1836 *p++ = htonl(0); /* bmval1 */
1839 *p++ = nfserr; /* no htonl */
1840 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1845 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1846 loff_t offset, ino_t ino, unsigned int d_type)
1848 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1850 u32 *p = cd->buffer;
1851 int nfserr = nfserr_toosmall;
1853 /* In nfsv4, "." and ".." never make it onto the wire.. */
1854 if (name && isdotent(name, namlen)) {
1855 cd->common.err = nfs_ok;
1860 xdr_encode_hyper(cd->offset, (u64) offset);
1862 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1866 *p++ = xdr_one; /* mark entry present */
1867 cd->offset = p; /* remember pointer */
1868 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1869 p = xdr_encode_array(p, name, namlen); /* name length & name */
1871 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1876 case nfserr_resource:
1877 nfserr = nfserr_toosmall;
1883 * If the client requested the RDATTR_ERROR attribute,
1884 * we stuff the error code into this attribute
1885 * and continue. If this attribute was not requested,
1886 * then in accordance with the spec, we fail the
1887 * entire READDIR operation(!)
1889 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1891 nfserr = nfserr_toosmall;
1892 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1896 cd->buflen -= (p - cd->buffer);
1898 cd->common.err = nfs_ok;
1901 cd->common.err = nfserr;
1906 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1912 WRITE32(access->ac_supported);
1913 WRITE32(access->ac_resp_access);
1919 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1921 ENCODE_SEQID_OP_HEAD;
1924 RESERVE_SPACE(sizeof(stateid_t));
1925 WRITE32(close->cl_stateid.si_generation);
1926 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1929 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1934 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1940 WRITEMEM(commit->co_verf.data, 8);
1946 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1952 WRITECINFO(create->cr_cinfo);
1954 WRITE32(create->cr_bmval[0]);
1955 WRITE32(create->cr_bmval[1]);
1961 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1963 struct svc_fh *fhp = getattr->ga_fhp;
1969 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1970 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1971 resp->p, &buflen, getattr->ga_bmval,
1980 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1986 len = fhp->fh_handle.fh_size;
1987 RESERVE_SPACE(len + 4);
1989 WRITEMEM(&fhp->fh_handle.fh_base, len);
1995 * Including all fields other than the name, a LOCK4denied structure requires
1996 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1999 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2003 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2004 WRITE64(ld->ld_start);
2005 WRITE64(ld->ld_length);
2006 WRITE32(ld->ld_type);
2008 WRITEMEM(&ld->ld_clientid, 8);
2009 WRITE32(ld->ld_sop->so_owner.len);
2010 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2011 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2012 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2013 WRITE64((u64)0); /* clientid */
2014 WRITE32(0); /* length of owner name */
2020 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
2023 ENCODE_SEQID_OP_HEAD;
2026 RESERVE_SPACE(4 + sizeof(stateid_t));
2027 WRITE32(lock->lk_resp_stateid.si_generation);
2028 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2030 } else if (nfserr == nfserr_denied)
2031 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2033 ENCODE_SEQID_OP_TAIL(lock->lk_stateowner);
2037 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
2039 if (nfserr == nfserr_denied)
2040 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2044 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
2046 ENCODE_SEQID_OP_HEAD;
2049 RESERVE_SPACE(sizeof(stateid_t));
2050 WRITE32(locku->lu_stateid.si_generation);
2051 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2055 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2060 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
2066 WRITECINFO(link->li_cinfo);
2073 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
2075 ENCODE_SEQID_OP_HEAD;
2080 RESERVE_SPACE(36 + sizeof(stateid_t));
2081 WRITE32(open->op_stateid.si_generation);
2082 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2083 WRITECINFO(open->op_cinfo);
2084 WRITE32(open->op_rflags);
2086 WRITE32(open->op_bmval[0]);
2087 WRITE32(open->op_bmval[1]);
2088 WRITE32(open->op_delegate_type);
2091 switch (open->op_delegate_type) {
2092 case NFS4_OPEN_DELEGATE_NONE:
2094 case NFS4_OPEN_DELEGATE_READ:
2095 RESERVE_SPACE(20 + sizeof(stateid_t));
2096 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2100 * TODO: ACE's in delegations
2102 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2105 WRITE32(0); /* XXX: is NULL principal ok? */
2108 case NFS4_OPEN_DELEGATE_WRITE:
2109 RESERVE_SPACE(32 + sizeof(stateid_t));
2110 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2114 * TODO: space_limit's in delegations
2116 WRITE32(NFS4_LIMIT_SIZE);
2121 * TODO: ACE's in delegations
2123 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2126 WRITE32(0); /* XXX: is NULL principal ok? */
2132 /* XXX save filehandle here */
2134 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2138 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2140 ENCODE_SEQID_OP_HEAD;
2143 RESERVE_SPACE(sizeof(stateid_t));
2144 WRITE32(oc->oc_resp_stateid.si_generation);
2145 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2149 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2153 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2155 ENCODE_SEQID_OP_HEAD;
2158 RESERVE_SPACE(sizeof(stateid_t));
2159 WRITE32(od->od_stateid.si_generation);
2160 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2164 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2168 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2172 unsigned long maxcount;
2178 if (resp->xbuf->page_len)
2179 return nfserr_resource;
2181 RESERVE_SPACE(8); /* eof flag and byte count */
2183 maxcount = NFSSVC_MAXBLKSIZE;
2184 if (maxcount > read->rd_length)
2185 maxcount = read->rd_length;
2190 pn = resp->rqstp->rq_resused;
2191 svc_take_page(resp->rqstp);
2192 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2193 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2199 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp,
2201 read->rd_iov, read->rd_vlen,
2203 if (nfserr == nfserr_symlink)
2204 nfserr = nfserr_inval;
2207 eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2212 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2214 resp->xbuf->page_len = maxcount;
2216 /* read zero bytes -> don't set up tail */
2220 /* set up page for remaining responses */
2221 svc_take_page(resp->rqstp);
2222 resp->xbuf->tail[0].iov_base =
2223 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2224 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2225 resp->xbuf->tail[0].iov_len = 0;
2226 resp->p = resp->xbuf->tail[0].iov_base;
2227 resp->end = resp->p + PAGE_SIZE/4;
2231 resp->xbuf->tail[0].iov_base += maxcount&3;
2232 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2238 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2246 if (resp->xbuf->page_len)
2247 return nfserr_resource;
2249 svc_take_page(resp->rqstp);
2250 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2252 maxcount = PAGE_SIZE;
2256 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2257 * if they would overflow the buffer. Is this kosher in NFSv4? If
2258 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2259 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2261 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2262 if (nfserr == nfserr_isdir)
2263 return nfserr_inval;
2269 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2271 svc_take_page(resp->rqstp);
2272 resp->xbuf->tail[0].iov_base =
2273 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2274 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2275 resp->xbuf->tail[0].iov_len = 0;
2276 resp->p = resp->xbuf->tail[0].iov_base;
2277 resp->end = resp->p + PAGE_SIZE/4;
2279 resp->xbuf->page_len = maxcount;
2282 resp->xbuf->tail[0].iov_base += maxcount&3;
2283 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2289 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2298 if (resp->xbuf->page_len)
2299 return nfserr_resource;
2301 RESERVE_SPACE(8); /* verifier */
2304 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2308 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2310 maxcount = PAGE_SIZE;
2311 if (maxcount > readdir->rd_maxcount)
2312 maxcount = readdir->rd_maxcount;
2315 * Convert from bytes to words, account for the two words already
2316 * written, make sure to leave two words at the end for the next
2317 * pointer and eof field.
2319 maxcount = (maxcount >> 2) - 4;
2321 nfserr = nfserr_toosmall;
2325 svc_take_page(resp->rqstp);
2326 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2327 readdir->common.err = 0;
2328 readdir->buflen = maxcount;
2329 readdir->buffer = page;
2330 readdir->offset = NULL;
2332 offset = readdir->rd_cookie;
2333 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2335 &readdir->common, nfsd4_encode_dirent);
2336 if (nfserr == nfs_ok &&
2337 readdir->common.err == nfserr_toosmall &&
2338 readdir->buffer == page)
2339 nfserr = nfserr_toosmall;
2340 if (nfserr == nfserr_symlink)
2341 nfserr = nfserr_notdir;
2345 if (readdir->offset)
2346 xdr_encode_hyper(readdir->offset, offset);
2348 p = readdir->buffer;
2349 *p++ = 0; /* no more entries */
2350 *p++ = htonl(readdir->common.err == nfserr_eof);
2351 resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2353 /* allocate a page for the tail */
2354 svc_take_page(resp->rqstp);
2355 resp->xbuf->tail[0].iov_base =
2356 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2357 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2358 resp->xbuf->tail[0].iov_len = 0;
2359 resp->p = resp->xbuf->tail[0].iov_base;
2360 resp->end = resp->p + PAGE_SIZE/4;
2370 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2376 WRITECINFO(remove->rm_cinfo);
2382 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2388 WRITECINFO(rename->rn_sinfo);
2389 WRITECINFO(rename->rn_tinfo);
2395 * The SETATTR encode routine is special -- it always encodes a bitmap,
2396 * regardless of the error status.
2399 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2411 WRITE32(setattr->sa_bmval[0]);
2412 WRITE32(setattr->sa_bmval[1]);
2418 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2423 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2424 WRITEMEM(&scd->se_clientid, 8);
2425 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2428 else if (nfserr == nfserr_clid_inuse) {
2437 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2443 WRITE32(write->wr_bytes_written);
2444 WRITE32(write->wr_how_written);
2445 WRITEMEM(write->wr_verifier.data, 8);
2451 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2458 statp = p++; /* to be backfilled at the end */
2461 switch (op->opnum) {
2463 nfsd4_encode_access(resp, op->status, &op->u.access);
2466 nfsd4_encode_close(resp, op->status, &op->u.close);
2469 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2472 nfsd4_encode_create(resp, op->status, &op->u.create);
2474 case OP_DELEGRETURN:
2477 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2480 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2483 nfsd4_encode_link(resp, op->status, &op->u.link);
2486 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2489 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2492 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2501 nfsd4_encode_open(resp, op->status, &op->u.open);
2503 case OP_OPEN_CONFIRM:
2504 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2506 case OP_OPEN_DOWNGRADE:
2507 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2514 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2517 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2520 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2523 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2526 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2535 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2537 case OP_SETCLIENTID:
2538 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2540 case OP_SETCLIENTID_CONFIRM:
2545 nfsd4_encode_write(resp, op->status, &op->u.write);
2547 case OP_RELEASE_LOCKOWNER:
2554 * Note: We write the status directly, instead of using WRITE32(),
2555 * since it is already in network byte order.
2557 *statp = op->status;
2561 * Encode the reply stored in the stateowner reply cache
2563 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2564 * previously sent already encoded operation.
2566 * called with nfs4_lock_state() held
2569 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2572 struct nfs4_replay *rp = op->replay;
2578 *p++ = rp->rp_status; /* already xdr'ed */
2581 RESERVE_SPACE(rp->rp_buflen);
2582 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2587 * END OF "GENERIC" ENCODE ROUTINES.
2591 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2593 return xdr_ressize_check(rqstp, p);
2596 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2598 if (args->ops != args->iops) {
2600 args->ops = args->iops;
2606 while (args->to_free) {
2607 struct tmpbuf *tb = args->to_free;
2608 args->to_free = tb->next;
2609 tb->release(tb->buf);
2615 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2620 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2621 args->pagelist = rqstp->rq_arg.pages;
2622 args->pagelen = rqstp->rq_arg.page_len;
2624 args->to_free = NULL;
2625 args->ops = args->iops;
2626 args->rqstp = rqstp;
2628 status = nfsd4_decode_compound(args);
2630 nfsd4_release_compoundargs(args);
2636 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2639 * All that remains is to write the tag and operation count...
2643 *p++ = htonl(resp->taglen);
2644 memcpy(p, resp->tag, resp->taglen);
2645 p += XDR_QUADLEN(resp->taglen);
2646 *p++ = htonl(resp->opcnt);
2648 if (rqstp->rq_res.page_len)
2649 iov = &rqstp->rq_res.tail[0];
2651 iov = &rqstp->rq_res.head[0];
2652 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2653 BUG_ON(iov->iov_len > PAGE_SIZE);