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/vs_tag.h>
62 #define NFSDDBG_FACILITY NFSDDBG_XDR
65 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
66 * directory in order to indicate to the client that a filesystem boundary is present
67 * We use a fixed fsid for a referral
69 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
70 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
73 check_filename(char *str, int len, __be32 err)
79 if (isdotent(str, len))
81 for (i = 0; i < len; i++)
88 * START OF "GENERIC" DECODE ROUTINES.
89 * These may look a little ugly since they are imported from a "generic"
90 * set of XDR encode/decode routines which are intended to be shared by
91 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
93 * If the pain of reading these is too great, it should be a straightforward
94 * task to translate them into Linux-specific versions which are more
95 * consistent with the style used in NFSv2/v3...
100 #define DECODE_TAIL \
105 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
106 status = nfserr_bad_xdr; \
109 #define READ32(x) (x) = ntohl(*p++)
110 #define READ64(x) do { \
111 (x) = (u64)ntohl(*p++) << 32; \
112 (x) |= ntohl(*p++); \
114 #define READTIME(x) do { \
119 #define READMEM(x,nbytes) do { \
121 p += XDR_QUADLEN(nbytes); \
123 #define SAVEMEM(x,nbytes) do { \
124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
125 savemem(argp, p, nbytes) : \
127 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
130 p += XDR_QUADLEN(nbytes); \
132 #define COPYMEM(x,nbytes) do { \
133 memcpy((x), p, nbytes); \
134 p += XDR_QUADLEN(nbytes); \
137 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
138 #define READ_BUF(nbytes) do { \
139 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
141 argp->p += XDR_QUADLEN(nbytes); \
142 } else if (!(p = read_buf(argp, nbytes))) { \
143 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
148 static __be32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
150 /* We want more bytes than seem to be available.
151 * Maybe we need a new page, maybe we have just run out
153 int avail = (char*)argp->end - (char*)argp->p;
155 if (avail + argp->pagelen < nbytes)
157 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
159 /* ok, we can do it with the current plus the next page */
160 if (nbytes <= sizeof(argp->tmp))
164 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
169 memcpy(p, argp->p, avail);
170 /* step to next page */
171 argp->p = page_address(argp->pagelist[0]);
173 if (argp->pagelen < PAGE_SIZE) {
174 argp->end = p + (argp->pagelen>>2);
177 argp->end = p + (PAGE_SIZE>>2);
178 argp->pagelen -= PAGE_SIZE;
180 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
181 argp->p += XDR_QUADLEN(nbytes - avail);
186 defer_free(struct nfsd4_compoundargs *argp,
187 void (*release)(const void *), void *p)
191 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
195 tb->release = release;
196 tb->next = argp->to_free;
201 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
204 if (p == argp->tmp) {
205 new = kmalloc(nbytes, GFP_KERNEL);
206 if (!new) return NULL;
208 memcpy(p, argp->tmp, nbytes);
210 BUG_ON(p != argp->tmpp);
213 if (defer_free(argp, kfree, p)) {
222 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
235 READ_BUF(bmlen << 2);
245 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
246 struct nfs4_acl **acl)
248 int expected_len, len = 0;
255 if ((status = nfsd4_decode_bitmap(argp, bmval)))
259 * According to spec, unsupported attributes return ERR_NOTSUPP;
260 * read-only attributes return ERR_INVAL.
262 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
263 return nfserr_attrnotsupp;
264 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
268 READ32(expected_len);
270 if (bmval[0] & FATTR4_WORD0_SIZE) {
273 READ64(iattr->ia_size);
274 iattr->ia_valid |= ATTR_SIZE;
276 if (bmval[0] & FATTR4_WORD0_ACL) {
280 READ_BUF(4); len += 4;
283 *acl = nfs4_acl_new();
288 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
290 for (i = 0; i < nace; i++) {
291 READ_BUF(16); len += 16;
294 READ32(ace.access_mask);
297 len += XDR_QUADLEN(dummy32) << 2;
298 READMEM(buf, dummy32);
299 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
301 if (ace.whotype != NFS4_ACL_WHO_NAMED)
303 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
304 host_err = nfsd_map_name_to_gid(argp->rqstp,
305 buf, dummy32, &ace.who);
307 host_err = nfsd_map_name_to_uid(argp->rqstp,
308 buf, dummy32, &ace.who);
311 host_err = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
312 ace.access_mask, ace.whotype, ace.who);
318 if (bmval[1] & FATTR4_WORD1_MODE) {
321 READ32(iattr->ia_mode);
322 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
323 iattr->ia_valid |= ATTR_MODE;
325 if (bmval[1] & FATTR4_WORD1_OWNER) {
330 len += (XDR_QUADLEN(dummy32) << 2);
331 READMEM(buf, dummy32);
332 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
334 iattr->ia_valid |= ATTR_UID;
336 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
341 len += (XDR_QUADLEN(dummy32) << 2);
342 READMEM(buf, dummy32);
343 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
345 iattr->ia_valid |= ATTR_GID;
347 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
352 case NFS4_SET_TO_CLIENT_TIME:
353 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
354 all 32 bits of 'nseconds'. */
360 READ32(iattr->ia_atime.tv_sec);
361 READ32(iattr->ia_atime.tv_nsec);
362 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
364 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
366 case NFS4_SET_TO_SERVER_TIME:
367 iattr->ia_valid |= ATTR_ATIME;
373 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
374 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
375 all 32 bits of 'nseconds'. */
381 READ32(iattr->ia_ctime.tv_sec);
382 READ32(iattr->ia_ctime.tv_nsec);
383 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
385 iattr->ia_valid |= ATTR_CTIME;
387 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
392 case NFS4_SET_TO_CLIENT_TIME:
393 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
394 all 32 bits of 'nseconds'. */
400 READ32(iattr->ia_mtime.tv_sec);
401 READ32(iattr->ia_mtime.tv_nsec);
402 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
404 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
406 case NFS4_SET_TO_SERVER_TIME:
407 iattr->ia_valid |= ATTR_MTIME;
413 if (len != expected_len)
419 status = nfserrno(host_err);
424 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
429 READ32(access->ac_req_access);
435 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
439 close->cl_stateowner = NULL;
440 READ_BUF(4 + sizeof(stateid_t));
441 READ32(close->cl_seqid);
442 READ32(close->cl_stateid.si_generation);
443 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
450 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
455 READ64(commit->co_offset);
456 READ32(commit->co_count);
462 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
467 READ32(create->cr_type);
468 switch (create->cr_type) {
471 READ32(create->cr_linklen);
472 READ_BUF(create->cr_linklen);
473 SAVEMEM(create->cr_linkname, create->cr_linklen);
478 READ32(create->cr_specdata1);
479 READ32(create->cr_specdata2);
489 READ32(create->cr_namelen);
490 READ_BUF(create->cr_namelen);
491 SAVEMEM(create->cr_name, create->cr_namelen);
492 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
495 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
502 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
506 READ_BUF(sizeof(stateid_t));
507 READ32(dr->dr_stateid.si_generation);
508 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
514 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
516 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
520 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
525 READ32(link->li_namelen);
526 READ_BUF(link->li_namelen);
527 SAVEMEM(link->li_name, link->li_namelen);
528 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
535 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
539 lock->lk_replay_owner = NULL;
541 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
544 READ32(lock->lk_type);
545 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
547 READ32(lock->lk_reclaim);
548 READ64(lock->lk_offset);
549 READ64(lock->lk_length);
550 READ32(lock->lk_is_new);
552 if (lock->lk_is_new) {
554 READ32(lock->lk_new_open_seqid);
555 READ32(lock->lk_new_open_stateid.si_generation);
557 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
558 READ32(lock->lk_new_lock_seqid);
559 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
560 READ32(lock->lk_new_owner.len);
561 READ_BUF(lock->lk_new_owner.len);
562 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
565 READ32(lock->lk_old_lock_stateid.si_generation);
566 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
567 READ32(lock->lk_old_lock_seqid);
574 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
579 READ32(lockt->lt_type);
580 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
582 READ64(lockt->lt_offset);
583 READ64(lockt->lt_length);
584 COPYMEM(&lockt->lt_clientid, 8);
585 READ32(lockt->lt_owner.len);
586 READ_BUF(lockt->lt_owner.len);
587 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
593 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
597 locku->lu_stateowner = NULL;
598 READ_BUF(24 + sizeof(stateid_t));
599 READ32(locku->lu_type);
600 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
602 READ32(locku->lu_seqid);
603 READ32(locku->lu_stateid.si_generation);
604 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
605 READ64(locku->lu_offset);
606 READ64(locku->lu_length);
612 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
617 READ32(lookup->lo_len);
618 READ_BUF(lookup->lo_len);
619 SAVEMEM(lookup->lo_name, lookup->lo_len);
620 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
627 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
631 memset(open->op_bmval, 0, sizeof(open->op_bmval));
632 open->op_iattr.ia_valid = 0;
633 open->op_stateowner = NULL;
635 /* seqid, share_access, share_deny, clientid, ownerlen */
636 READ_BUF(16 + sizeof(clientid_t));
637 READ32(open->op_seqid);
638 READ32(open->op_share_access);
639 READ32(open->op_share_deny);
640 COPYMEM(&open->op_clientid, sizeof(clientid_t));
641 READ32(open->op_owner.len);
643 /* owner, open_flag */
644 READ_BUF(open->op_owner.len + 4);
645 SAVEMEM(open->op_owner.data, open->op_owner.len);
646 READ32(open->op_create);
647 switch (open->op_create) {
648 case NFS4_OPEN_NOCREATE:
650 case NFS4_OPEN_CREATE:
652 READ32(open->op_createmode);
653 switch (open->op_createmode) {
654 case NFS4_CREATE_UNCHECKED:
655 case NFS4_CREATE_GUARDED:
656 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
659 case NFS4_CREATE_EXCLUSIVE:
661 COPYMEM(open->op_verf.data, 8);
673 READ32(open->op_claim_type);
674 switch (open->op_claim_type) {
675 case NFS4_OPEN_CLAIM_NULL:
676 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
678 READ32(open->op_fname.len);
679 READ_BUF(open->op_fname.len);
680 SAVEMEM(open->op_fname.data, open->op_fname.len);
681 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
684 case NFS4_OPEN_CLAIM_PREVIOUS:
686 READ32(open->op_delegate_type);
688 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
689 READ_BUF(sizeof(stateid_t) + 4);
690 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
691 READ32(open->op_fname.len);
692 READ_BUF(open->op_fname.len);
693 SAVEMEM(open->op_fname.data, open->op_fname.len);
694 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
705 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
709 open_conf->oc_stateowner = NULL;
710 READ_BUF(4 + sizeof(stateid_t));
711 READ32(open_conf->oc_req_stateid.si_generation);
712 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
713 READ32(open_conf->oc_seqid);
719 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
723 open_down->od_stateowner = NULL;
724 READ_BUF(12 + sizeof(stateid_t));
725 READ32(open_down->od_stateid.si_generation);
726 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
727 READ32(open_down->od_seqid);
728 READ32(open_down->od_share_access);
729 READ32(open_down->od_share_deny);
735 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
740 READ32(putfh->pf_fhlen);
741 if (putfh->pf_fhlen > NFS4_FHSIZE)
743 READ_BUF(putfh->pf_fhlen);
744 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
750 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
754 READ_BUF(sizeof(stateid_t) + 12);
755 READ32(read->rd_stateid.si_generation);
756 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
757 READ64(read->rd_offset);
758 READ32(read->rd_length);
764 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
769 READ64(readdir->rd_cookie);
770 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
771 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
772 READ32(readdir->rd_maxcount);
773 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
780 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
785 READ32(remove->rm_namelen);
786 READ_BUF(remove->rm_namelen);
787 SAVEMEM(remove->rm_name, remove->rm_namelen);
788 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
795 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
800 READ32(rename->rn_snamelen);
801 READ_BUF(rename->rn_snamelen + 4);
802 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
803 READ32(rename->rn_tnamelen);
804 READ_BUF(rename->rn_tnamelen);
805 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
806 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
808 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
815 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
819 READ_BUF(sizeof(clientid_t));
820 COPYMEM(clientid, sizeof(clientid_t));
826 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
830 READ_BUF(sizeof(stateid_t));
831 READ32(setattr->sa_stateid.si_generation);
832 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
833 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
840 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
845 COPYMEM(setclientid->se_verf.data, 8);
846 READ32(setclientid->se_namelen);
848 READ_BUF(setclientid->se_namelen + 8);
849 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
850 READ32(setclientid->se_callback_prog);
851 READ32(setclientid->se_callback_netid_len);
853 READ_BUF(setclientid->se_callback_netid_len + 4);
854 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
855 READ32(setclientid->se_callback_addr_len);
857 READ_BUF(setclientid->se_callback_addr_len + 4);
858 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
859 READ32(setclientid->se_callback_ident);
865 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
869 READ_BUF(8 + sizeof(nfs4_verifier));
870 COPYMEM(&scd_c->sc_clientid, 8);
871 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
876 /* Also used for NVERIFY */
878 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
881 struct nfsd4_compoundargs save = {
884 .rqstp = argp->rqstp,
887 struct iattr ve_iattr; /* request */
888 struct nfs4_acl *ve_acl; /* request */
892 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
895 /* For convenience's sake, we compare raw xdr'd attributes in
896 * nfsd4_proc_verify; however we still decode here just to return
897 * correct error in case of bad xdr. */
899 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
900 if (status == nfserr_inval) {
901 status = nfserrno(status);
906 READ32(verify->ve_attrlen);
907 READ_BUF(verify->ve_attrlen);
908 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
914 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
921 READ_BUF(sizeof(stateid_opaque_t) + 20);
922 READ32(write->wr_stateid.si_generation);
923 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
924 READ64(write->wr_offset);
925 READ32(write->wr_stable_how);
926 if (write->wr_stable_how > 2)
928 READ32(write->wr_buflen);
930 /* Sorry .. no magic macros for this.. *
931 * READ_BUF(write->wr_buflen);
932 * SAVEMEM(write->wr_buf, write->wr_buflen);
934 avail = (char*)argp->end - (char*)argp->p;
935 if (avail + argp->pagelen < write->wr_buflen) {
936 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
939 argp->rqstp->rq_vec[0].iov_base = p;
940 argp->rqstp->rq_vec[0].iov_len = avail;
942 len = write->wr_buflen;
943 while (len > argp->rqstp->rq_vec[v].iov_len) {
944 len -= argp->rqstp->rq_vec[v].iov_len;
946 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
948 if (argp->pagelen >= PAGE_SIZE) {
949 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
950 argp->pagelen -= PAGE_SIZE;
952 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
953 argp->pagelen -= len;
956 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
957 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
958 argp->rqstp->rq_vec[v].iov_len = len;
959 write->wr_vlen = v+1;
965 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
970 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
971 READ32(rlockowner->rl_owner.len);
972 READ_BUF(rlockowner->rl_owner.len);
973 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
979 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
986 * XXX: According to spec, we should check the tag
987 * for UTF-8 compliance. I'm postponing this for
988 * now because it seems that some clients do use
992 READ32(argp->taglen);
993 READ_BUF(argp->taglen + 8);
994 SAVEMEM(argp->tag, argp->taglen);
995 READ32(argp->minorversion);
998 if (argp->taglen > NFSD4_MAX_TAGLEN)
1000 if (argp->opcnt > 100)
1003 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1004 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1006 argp->ops = argp->iops;
1007 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1012 for (i = 0; i < argp->opcnt; i++) {
1017 * We can't use READ_BUF() here because we need to handle
1018 * a missing opcode as an OP_WRITE + 1. So we need to check
1019 * to see if we're truly at the end of our buffer or if there
1020 * is another page we need to flip to.
1023 if (argp->p == argp->end) {
1024 if (argp->pagelen < 4) {
1025 /* There isn't an opcode still on the wire */
1026 op->opnum = OP_WRITE + 1;
1027 op->status = nfserr_bad_xdr;
1033 * False alarm. We just hit a page boundary, but there
1034 * is still data available. Move pointer across page
1035 * boundary. *snip from READ_BUF*
1037 argp->p = page_address(argp->pagelist[0]);
1039 if (argp->pagelen < PAGE_SIZE) {
1040 argp->end = p + (argp->pagelen>>2);
1043 argp->end = p + (PAGE_SIZE>>2);
1044 argp->pagelen -= PAGE_SIZE;
1047 op->opnum = ntohl(*argp->p++);
1049 switch (op->opnum) {
1050 case 2: /* Reserved operation */
1051 op->opnum = OP_ILLEGAL;
1052 if (argp->minorversion == 0)
1053 op->status = nfserr_op_illegal;
1055 op->status = nfserr_minor_vers_mismatch;
1058 op->status = nfsd4_decode_access(argp, &op->u.access);
1061 op->status = nfsd4_decode_close(argp, &op->u.close);
1064 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1067 op->status = nfsd4_decode_create(argp, &op->u.create);
1069 case OP_DELEGRETURN:
1070 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1073 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1076 op->status = nfs_ok;
1079 op->status = nfsd4_decode_link(argp, &op->u.link);
1082 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1085 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1088 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1091 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1094 op->status = nfs_ok;
1097 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1100 op->status = nfsd4_decode_open(argp, &op->u.open);
1102 case OP_OPEN_CONFIRM:
1103 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1105 case OP_OPEN_DOWNGRADE:
1106 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1109 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1112 op->status = nfs_ok;
1115 op->status = nfsd4_decode_read(argp, &op->u.read);
1118 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1121 op->status = nfs_ok;
1124 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1127 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1130 op->status = nfs_ok;
1133 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1136 op->status = nfs_ok;
1139 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1141 case OP_SETCLIENTID:
1142 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1144 case OP_SETCLIENTID_CONFIRM:
1145 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1148 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1151 op->status = nfsd4_decode_write(argp, &op->u.write);
1153 case OP_RELEASE_LOCKOWNER:
1154 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1157 op->opnum = OP_ILLEGAL;
1158 op->status = nfserr_op_illegal;
1171 * END OF "GENERIC" DECODE ROUTINES.
1175 * START OF "GENERIC" ENCODE ROUTINES.
1176 * These may look a little ugly since they are imported from a "generic"
1177 * set of XDR encode/decode routines which are intended to be shared by
1178 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1180 * If the pain of reading these is too great, it should be a straightforward
1181 * task to translate them into Linux-specific versions which are more
1182 * consistent with the style used in NFSv2/v3...
1184 #define ENCODE_HEAD __be32 *p
1186 #define WRITE32(n) *p++ = htonl(n)
1187 #define WRITE64(n) do { \
1188 *p++ = htonl((u32)((n) >> 32)); \
1189 *p++ = htonl((u32)(n)); \
1191 #define WRITEMEM(ptr,nbytes) do { \
1192 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1193 memcpy(p, ptr, nbytes); \
1194 p += XDR_QUADLEN(nbytes); \
1196 #define WRITECINFO(c) do { \
1197 *p++ = htonl(c.atomic); \
1198 *p++ = htonl(c.before_ctime_sec); \
1199 *p++ = htonl(c.before_ctime_nsec); \
1200 *p++ = htonl(c.after_ctime_sec); \
1201 *p++ = htonl(c.after_ctime_nsec); \
1204 #define RESERVE_SPACE(nbytes) do { \
1206 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1208 #define ADJUST_ARGS() resp->p = p
1211 * Header routine to setup seqid operation replay cache
1213 #define ENCODE_SEQID_OP_HEAD \
1220 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1221 * is where sequence id's are incremented, and the replay cache is filled.
1222 * Note that we increment sequence id's here, at the last moment, so we're sure
1223 * we know whether the error to be returned is a sequence id mutating error.
1226 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1227 if (seqid_mutating_err(nfserr) && stateowner) { \
1228 stateowner->so_seqid++; \
1229 stateowner->so_replay.rp_status = nfserr; \
1230 stateowner->so_replay.rp_buflen = \
1231 (((char *)(resp)->p - (char *)save)); \
1232 memcpy(stateowner->so_replay.rp_buf, save, \
1233 stateowner->so_replay.rp_buflen); \
1236 /* Encode as an array of strings the string given with components
1239 static __be32 nfsd4_encode_components(char sep, char *components,
1240 __be32 **pp, int *buflen)
1244 int strlen, count=0;
1247 dprintk("nfsd4_encode_components(%s)\n", components);
1248 if ((*buflen -= 4) < 0)
1249 return nfserr_resource;
1250 WRITE32(0); /* We will fill this in with @count later */
1251 end = str = components;
1253 for (; *end && (*end != sep); end++)
1254 ; /* Point to end of component */
1257 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1258 return nfserr_resource;
1260 WRITEMEM(str, strlen);
1274 * encode a location element of a fs_locations structure
1276 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1277 __be32 **pp, int *buflen)
1282 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1285 status = nfsd4_encode_components('/', location->path, &p, buflen);
1293 * Return the path to an export point in the pseudo filesystem namespace
1294 * Returned string is safe to use as long as the caller holds a reference
1297 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1299 struct svc_fh tmp_fh;
1300 char *path, *rootpath;
1302 fh_init(&tmp_fh, NFS4_FHSIZE);
1303 *stat = exp_pseudoroot(rqstp->rq_client, &tmp_fh, &rqstp->rq_chandle);
1306 rootpath = tmp_fh.fh_export->ex_path;
1308 path = exp->ex_path;
1310 if (strncmp(path, rootpath, strlen(rootpath))) {
1311 printk("nfsd: fs_locations failed;"
1312 "%s is not contained in %s\n", path, rootpath);
1313 *stat = nfserr_notsupp;
1317 return path + strlen(rootpath);
1321 * encode a fs_locations structure
1323 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1324 struct svc_export *exp,
1325 __be32 **pp, int *buflen)
1330 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1331 char *root = nfsd4_path(rqstp, exp, &status);
1335 status = nfsd4_encode_components('/', root, &p, buflen);
1338 if ((*buflen -= 4) < 0)
1339 return nfserr_resource;
1340 WRITE32(fslocs->locations_count);
1341 for (i=0; i<fslocs->locations_count; i++) {
1342 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1351 static u32 nfs4_ftypes[16] = {
1352 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1353 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1354 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1355 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1359 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1360 __be32 **p, int *buflen)
1364 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1365 return nfserr_resource;
1366 if (whotype != NFS4_ACL_WHO_NAMED)
1367 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1369 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1371 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1373 return nfserrno(status);
1374 *p = xdr_encode_opaque(*p, NULL, status);
1375 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1376 BUG_ON(*buflen < 0);
1380 static inline __be32
1381 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1383 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1386 static inline __be32
1387 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1389 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1392 static inline __be32
1393 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1394 __be32 **p, int *buflen)
1396 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1399 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1400 FATTR4_WORD0_RDATTR_ERROR)
1401 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1403 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1405 /* As per referral draft: */
1406 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1407 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1408 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1409 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1410 *rdattr_err = NFSERR_MOVED;
1412 return nfserr_moved;
1414 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1415 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1420 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1423 * @countp is the buffer size in _words_; upon successful return this becomes
1424 * replaced with the number of words written.
1427 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1428 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1429 struct svc_rqst *rqstp)
1431 u32 bmval0 = bmval[0];
1432 u32 bmval1 = bmval[1];
1434 struct svc_fh tempfh;
1435 struct kstatfs statfs;
1436 int buflen = *countp << 2;
1445 struct nfs4_acl *acl = NULL;
1447 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1448 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1449 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1451 if (exp->ex_fslocs.migrated) {
1452 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1457 err = vfs_getattr(exp->ex_mnt, dentry, &stat);
1460 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1461 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1462 FATTR4_WORD1_SPACE_TOTAL))) {
1463 err = vfs_statfs(dentry, &statfs);
1467 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1468 fh_init(&tempfh, NFS4_FHSIZE);
1469 status = fh_compose(&tempfh, exp, dentry, NULL);
1474 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1475 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1476 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1477 aclsupport = (err == 0);
1478 if (bmval0 & FATTR4_WORD0_ACL) {
1479 if (err == -EOPNOTSUPP)
1480 bmval0 &= ~FATTR4_WORD0_ACL;
1481 else if (err == -EINVAL) {
1482 status = nfserr_attrnotsupp;
1484 } else if (err != 0)
1488 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1489 if (exp->ex_fslocs.locations == NULL) {
1490 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1493 if ((buflen -= 16) < 0)
1499 attrlenp = p++; /* to be backfilled later */
1501 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1502 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1503 if ((buflen -= 12) < 0)
1506 word0 &= ~FATTR4_WORD0_ACL;
1507 if (!exp->ex_fslocs.locations)
1508 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1511 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1513 if (bmval0 & FATTR4_WORD0_TYPE) {
1514 if ((buflen -= 4) < 0)
1516 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1517 if (dummy == NF4BAD)
1518 goto out_serverfault;
1521 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1522 if ((buflen -= 4) < 0)
1524 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1525 WRITE32(NFS4_FH_PERSISTENT);
1527 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1529 if (bmval0 & FATTR4_WORD0_CHANGE) {
1531 * Note: This _must_ be consistent with the scheme for writing
1532 * change_info, so any changes made here must be reflected there
1533 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1536 if ((buflen -= 8) < 0)
1538 WRITE32(stat.ctime.tv_sec);
1539 WRITE32(stat.ctime.tv_nsec);
1541 if (bmval0 & FATTR4_WORD0_SIZE) {
1542 if ((buflen -= 8) < 0)
1546 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1547 if ((buflen -= 4) < 0)
1551 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1552 if ((buflen -= 4) < 0)
1556 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1557 if ((buflen -= 4) < 0)
1561 if (bmval0 & FATTR4_WORD0_FSID) {
1562 if ((buflen -= 16) < 0)
1564 if (exp->ex_fslocs.migrated) {
1565 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1566 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1567 } else if (is_fsid(fhp, rqstp->rq_reffh)) {
1568 WRITE64((u64)exp->ex_fsid);
1572 WRITE32(MAJOR(stat.dev));
1574 WRITE32(MINOR(stat.dev));
1577 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1578 if ((buflen -= 4) < 0)
1582 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1583 if ((buflen -= 4) < 0)
1585 WRITE32(NFSD_LEASE_TIME);
1587 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1588 if ((buflen -= 4) < 0)
1590 WRITE32(rdattr_err);
1592 if (bmval0 & FATTR4_WORD0_ACL) {
1593 struct nfs4_ace *ace;
1594 struct list_head *h;
1597 if ((buflen -= 4) < 0)
1603 if ((buflen -= 4) < 0)
1605 WRITE32(acl->naces);
1607 list_for_each(h, &acl->ace_head) {
1608 ace = list_entry(h, struct nfs4_ace, l_ace);
1610 if ((buflen -= 4*3) < 0)
1614 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1615 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1616 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1618 if (status == nfserr_resource)
1625 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1626 if ((buflen -= 4) < 0)
1628 WRITE32(aclsupport ?
1629 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1631 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1632 if ((buflen -= 4) < 0)
1636 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1637 if ((buflen -= 4) < 0)
1641 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1642 if ((buflen -= 4) < 0)
1646 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1647 if ((buflen -= 4) < 0)
1651 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1652 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1655 WRITE32(fhp->fh_handle.fh_size);
1656 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1658 if (bmval0 & FATTR4_WORD0_FILEID) {
1659 if ((buflen -= 8) < 0)
1661 WRITE64((u64) stat.ino);
1663 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1664 if ((buflen -= 8) < 0)
1666 WRITE64((u64) statfs.f_ffree);
1668 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1669 if ((buflen -= 8) < 0)
1671 WRITE64((u64) statfs.f_ffree);
1673 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1674 if ((buflen -= 8) < 0)
1676 WRITE64((u64) statfs.f_files);
1678 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1679 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1680 if (status == nfserr_resource)
1685 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1686 if ((buflen -= 4) < 0)
1690 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1691 if ((buflen -= 8) < 0)
1695 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1696 if ((buflen -= 4) < 0)
1700 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1701 if ((buflen -= 4) < 0)
1705 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1706 if ((buflen -= 8) < 0)
1708 WRITE64((u64) svc_max_payload(rqstp));
1710 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1711 if ((buflen -= 8) < 0)
1713 WRITE64((u64) svc_max_payload(rqstp));
1715 if (bmval1 & FATTR4_WORD1_MODE) {
1716 if ((buflen -= 4) < 0)
1718 WRITE32(stat.mode & S_IALLUGO);
1720 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1721 if ((buflen -= 4) < 0)
1725 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1726 if ((buflen -= 4) < 0)
1728 WRITE32(stat.nlink);
1730 if (bmval1 & FATTR4_WORD1_OWNER) {
1731 status = nfsd4_encode_user(rqstp,
1732 TAGINO_UID(DX_TAG(dentry->d_inode),
1733 stat.uid, stat.tag), &p, &buflen);
1734 if (status == nfserr_resource)
1739 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1740 status = nfsd4_encode_group(rqstp,
1741 TAGINO_GID(DX_TAG(dentry->d_inode),
1742 stat.gid, stat.tag), &p, &buflen);
1743 if (status == nfserr_resource)
1748 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1749 if ((buflen -= 8) < 0)
1751 WRITE32((u32) MAJOR(stat.rdev));
1752 WRITE32((u32) MINOR(stat.rdev));
1754 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1755 if ((buflen -= 8) < 0)
1757 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1760 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1761 if ((buflen -= 8) < 0)
1763 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1766 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1767 if ((buflen -= 8) < 0)
1769 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1772 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1773 if ((buflen -= 8) < 0)
1775 dummy64 = (u64)stat.blocks << 9;
1778 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1779 if ((buflen -= 12) < 0)
1782 WRITE32(stat.atime.tv_sec);
1783 WRITE32(stat.atime.tv_nsec);
1785 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1786 if ((buflen -= 12) < 0)
1792 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1793 if ((buflen -= 12) < 0)
1796 WRITE32(stat.ctime.tv_sec);
1797 WRITE32(stat.ctime.tv_nsec);
1799 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1800 if ((buflen -= 12) < 0)
1803 WRITE32(stat.mtime.tv_sec);
1804 WRITE32(stat.mtime.tv_nsec);
1806 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1807 struct dentry *mnt_pnt, *mnt_root;
1809 if ((buflen -= 8) < 0)
1811 mnt_root = exp->ex_mnt->mnt_root;
1812 if (mnt_root->d_inode == dentry->d_inode) {
1813 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1814 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1816 WRITE64((u64) stat.ino);
1818 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1819 *countp = p - buffer;
1828 status = nfserrno(err);
1832 status = nfserr_resource;
1835 status = nfserr_serverfault;
1840 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1841 const char *name, int namlen, __be32 *p, int *buflen)
1843 struct svc_export *exp = cd->rd_fhp->fh_export;
1844 struct dentry *dentry;
1847 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1849 return nfserrno(PTR_ERR(dentry));
1852 if (d_mountpoint(dentry)) {
1855 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
1857 nfserr = nfserrno(err);
1862 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1871 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
1878 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1879 *p++ = htonl(0); /* bmval1 */
1882 *p++ = nfserr; /* no htonl */
1883 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1888 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
1889 loff_t offset, u64 ino, unsigned int d_type)
1891 struct readdir_cd *ccd = ccdv;
1892 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1894 __be32 *p = cd->buffer;
1895 __be32 nfserr = nfserr_toosmall;
1897 /* In nfsv4, "." and ".." never make it onto the wire.. */
1898 if (name && isdotent(name, namlen)) {
1899 cd->common.err = nfs_ok;
1904 xdr_encode_hyper(cd->offset, (u64) offset);
1906 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1910 *p++ = xdr_one; /* mark entry present */
1911 cd->offset = p; /* remember pointer */
1912 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1913 p = xdr_encode_array(p, name, namlen); /* name length & name */
1915 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1920 case nfserr_resource:
1921 nfserr = nfserr_toosmall;
1927 * If the client requested the RDATTR_ERROR attribute,
1928 * we stuff the error code into this attribute
1929 * and continue. If this attribute was not requested,
1930 * then in accordance with the spec, we fail the
1931 * entire READDIR operation(!)
1933 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1935 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1937 nfserr = nfserr_toosmall;
1941 cd->buflen -= (p - cd->buffer);
1943 cd->common.err = nfs_ok;
1946 cd->common.err = nfserr;
1951 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
1957 WRITE32(access->ac_supported);
1958 WRITE32(access->ac_resp_access);
1964 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
1966 ENCODE_SEQID_OP_HEAD;
1969 RESERVE_SPACE(sizeof(stateid_t));
1970 WRITE32(close->cl_stateid.si_generation);
1971 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1974 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1979 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
1985 WRITEMEM(commit->co_verf.data, 8);
1991 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
1997 WRITECINFO(create->cr_cinfo);
1999 WRITE32(create->cr_bmval[0]);
2000 WRITE32(create->cr_bmval[1]);
2006 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2008 struct svc_fh *fhp = getattr->ga_fhp;
2014 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2015 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2016 resp->p, &buflen, getattr->ga_bmval,
2024 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh *fhp)
2030 len = fhp->fh_handle.fh_size;
2031 RESERVE_SPACE(len + 4);
2033 WRITEMEM(&fhp->fh_handle.fh_base, len);
2039 * Including all fields other than the name, a LOCK4denied structure requires
2040 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2043 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2047 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2048 WRITE64(ld->ld_start);
2049 WRITE64(ld->ld_length);
2050 WRITE32(ld->ld_type);
2052 WRITEMEM(&ld->ld_clientid, 8);
2053 WRITE32(ld->ld_sop->so_owner.len);
2054 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2055 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2056 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2057 WRITE64((u64)0); /* clientid */
2058 WRITE32(0); /* length of owner name */
2064 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2066 ENCODE_SEQID_OP_HEAD;
2069 RESERVE_SPACE(4 + sizeof(stateid_t));
2070 WRITE32(lock->lk_resp_stateid.si_generation);
2071 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2073 } else if (nfserr == nfserr_denied)
2074 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2076 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2080 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2082 if (nfserr == nfserr_denied)
2083 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2087 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2089 ENCODE_SEQID_OP_HEAD;
2092 RESERVE_SPACE(sizeof(stateid_t));
2093 WRITE32(locku->lu_stateid.si_generation);
2094 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
2098 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2103 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2109 WRITECINFO(link->li_cinfo);
2116 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2118 ENCODE_SEQID_OP_HEAD;
2123 RESERVE_SPACE(36 + sizeof(stateid_t));
2124 WRITE32(open->op_stateid.si_generation);
2125 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
2126 WRITECINFO(open->op_cinfo);
2127 WRITE32(open->op_rflags);
2129 WRITE32(open->op_bmval[0]);
2130 WRITE32(open->op_bmval[1]);
2131 WRITE32(open->op_delegate_type);
2134 switch (open->op_delegate_type) {
2135 case NFS4_OPEN_DELEGATE_NONE:
2137 case NFS4_OPEN_DELEGATE_READ:
2138 RESERVE_SPACE(20 + sizeof(stateid_t));
2139 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2140 WRITE32(open->op_recall);
2143 * TODO: ACE's in delegations
2145 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2148 WRITE32(0); /* XXX: is NULL principal ok? */
2151 case NFS4_OPEN_DELEGATE_WRITE:
2152 RESERVE_SPACE(32 + sizeof(stateid_t));
2153 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
2157 * TODO: space_limit's in delegations
2159 WRITE32(NFS4_LIMIT_SIZE);
2164 * TODO: ACE's in delegations
2166 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2169 WRITE32(0); /* XXX: is NULL principal ok? */
2175 /* XXX save filehandle here */
2177 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2181 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2183 ENCODE_SEQID_OP_HEAD;
2186 RESERVE_SPACE(sizeof(stateid_t));
2187 WRITE32(oc->oc_resp_stateid.si_generation);
2188 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2192 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2196 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2198 ENCODE_SEQID_OP_HEAD;
2201 RESERVE_SPACE(sizeof(stateid_t));
2202 WRITE32(od->od_stateid.si_generation);
2203 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2207 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2211 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2212 struct nfsd4_read *read)
2216 unsigned long maxcount;
2222 if (resp->xbuf->page_len)
2223 return nfserr_resource;
2225 RESERVE_SPACE(8); /* eof flag and byte count */
2227 maxcount = svc_max_payload(resp->rqstp);
2228 if (maxcount > read->rd_length)
2229 maxcount = read->rd_length;
2234 pn = resp->rqstp->rq_resused++;
2235 resp->rqstp->rq_vec[v].iov_base =
2236 page_address(resp->rqstp->rq_respages[pn]);
2237 resp->rqstp->rq_vec[v].iov_len =
2238 len < PAGE_SIZE ? len : PAGE_SIZE;
2244 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2245 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2248 if (nfserr == nfserr_symlink)
2249 nfserr = nfserr_inval;
2252 eof = (read->rd_offset + maxcount >=
2253 read->rd_fhp->fh_dentry->d_inode->i_size);
2258 resp->xbuf->head[0].iov_len = (char*)p
2259 - (char*)resp->xbuf->head[0].iov_base;
2260 resp->xbuf->page_len = maxcount;
2262 /* Use rest of head for padding and remaining ops: */
2263 resp->xbuf->tail[0].iov_base = p;
2264 resp->xbuf->tail[0].iov_len = 0;
2268 resp->xbuf->tail[0].iov_base += maxcount&3;
2269 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2276 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2284 if (resp->xbuf->page_len)
2285 return nfserr_resource;
2287 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2289 maxcount = PAGE_SIZE;
2293 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2294 * if they would overflow the buffer. Is this kosher in NFSv4? If
2295 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2296 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2298 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2299 if (nfserr == nfserr_isdir)
2300 return nfserr_inval;
2306 resp->xbuf->head[0].iov_len = (char*)p
2307 - (char*)resp->xbuf->head[0].iov_base;
2308 resp->xbuf->page_len = maxcount;
2310 /* Use rest of head for padding and remaining ops: */
2311 resp->xbuf->tail[0].iov_base = p;
2312 resp->xbuf->tail[0].iov_len = 0;
2316 resp->xbuf->tail[0].iov_base += maxcount&3;
2317 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2324 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2328 __be32 *page, *savep, *tailbase;
2333 if (resp->xbuf->page_len)
2334 return nfserr_resource;
2336 RESERVE_SPACE(8); /* verifier */
2339 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2343 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2346 maxcount = PAGE_SIZE;
2347 if (maxcount > readdir->rd_maxcount)
2348 maxcount = readdir->rd_maxcount;
2351 * Convert from bytes to words, account for the two words already
2352 * written, make sure to leave two words at the end for the next
2353 * pointer and eof field.
2355 maxcount = (maxcount >> 2) - 4;
2357 nfserr = nfserr_toosmall;
2361 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2362 readdir->common.err = 0;
2363 readdir->buflen = maxcount;
2364 readdir->buffer = page;
2365 readdir->offset = NULL;
2367 offset = readdir->rd_cookie;
2368 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2370 &readdir->common, nfsd4_encode_dirent);
2371 if (nfserr == nfs_ok &&
2372 readdir->common.err == nfserr_toosmall &&
2373 readdir->buffer == page)
2374 nfserr = nfserr_toosmall;
2375 if (nfserr == nfserr_symlink)
2376 nfserr = nfserr_notdir;
2380 if (readdir->offset)
2381 xdr_encode_hyper(readdir->offset, offset);
2383 p = readdir->buffer;
2384 *p++ = 0; /* no more entries */
2385 *p++ = htonl(readdir->common.err == nfserr_eof);
2386 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2387 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2389 /* Use rest of head for padding and remaining ops: */
2390 resp->xbuf->tail[0].iov_base = tailbase;
2391 resp->xbuf->tail[0].iov_len = 0;
2392 resp->p = resp->xbuf->tail[0].iov_base;
2393 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2403 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2409 WRITECINFO(remove->rm_cinfo);
2415 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2421 WRITECINFO(rename->rn_sinfo);
2422 WRITECINFO(rename->rn_tinfo);
2428 * The SETATTR encode routine is special -- it always encodes a bitmap,
2429 * regardless of the error status.
2432 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2444 WRITE32(setattr->sa_bmval[0]);
2445 WRITE32(setattr->sa_bmval[1]);
2451 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2456 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2457 WRITEMEM(&scd->se_clientid, 8);
2458 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2461 else if (nfserr == nfserr_clid_inuse) {
2470 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2476 WRITE32(write->wr_bytes_written);
2477 WRITE32(write->wr_how_written);
2478 WRITEMEM(write->wr_verifier.data, 8);
2484 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2491 statp = p++; /* to be backfilled at the end */
2494 switch (op->opnum) {
2496 nfsd4_encode_access(resp, op->status, &op->u.access);
2499 nfsd4_encode_close(resp, op->status, &op->u.close);
2502 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2505 nfsd4_encode_create(resp, op->status, &op->u.create);
2507 case OP_DELEGRETURN:
2510 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2513 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2516 nfsd4_encode_link(resp, op->status, &op->u.link);
2519 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2522 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2525 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2534 nfsd4_encode_open(resp, op->status, &op->u.open);
2536 case OP_OPEN_CONFIRM:
2537 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2539 case OP_OPEN_DOWNGRADE:
2540 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2547 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2550 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2553 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2556 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2559 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2568 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2570 case OP_SETCLIENTID:
2571 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2573 case OP_SETCLIENTID_CONFIRM:
2578 nfsd4_encode_write(resp, op->status, &op->u.write);
2580 case OP_RELEASE_LOCKOWNER:
2587 * Note: We write the status directly, instead of using WRITE32(),
2588 * since it is already in network byte order.
2590 *statp = op->status;
2594 * Encode the reply stored in the stateowner reply cache
2596 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2597 * previously sent already encoded operation.
2599 * called with nfs4_lock_state() held
2602 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2605 struct nfs4_replay *rp = op->replay;
2611 *p++ = rp->rp_status; /* already xdr'ed */
2614 RESERVE_SPACE(rp->rp_buflen);
2615 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2620 * END OF "GENERIC" ENCODE ROUTINES.
2624 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
2626 return xdr_ressize_check(rqstp, p);
2629 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2631 if (args->ops != args->iops) {
2633 args->ops = args->iops;
2637 while (args->to_free) {
2638 struct tmpbuf *tb = args->to_free;
2639 args->to_free = tb->next;
2640 tb->release(tb->buf);
2646 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
2651 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2652 args->pagelist = rqstp->rq_arg.pages;
2653 args->pagelen = rqstp->rq_arg.page_len;
2655 args->to_free = NULL;
2656 args->ops = args->iops;
2657 args->rqstp = rqstp;
2659 status = nfsd4_decode_compound(args);
2661 nfsd4_release_compoundargs(args);
2667 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
2670 * All that remains is to write the tag and operation count...
2674 *p++ = htonl(resp->taglen);
2675 memcpy(p, resp->tag, resp->taglen);
2676 p += XDR_QUADLEN(resp->taglen);
2677 *p++ = htonl(resp->opcnt);
2679 if (rqstp->rq_res.page_len)
2680 iov = &rqstp->rq_res.tail[0];
2682 iov = &rqstp->rq_res.head[0];
2683 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2684 BUG_ON(iov->iov_len > PAGE_SIZE);