2 * Server-side XDR for NFSv4
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
43 #include <linux/param.h>
44 #include <linux/smp.h>
46 #include <linux/namei.h>
47 #include <linux/vfs.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/xdr.h>
50 #include <linux/sunrpc/svc.h>
51 #include <linux/sunrpc/clnt.h>
52 #include <linux/nfsd/nfsd.h>
53 #include <linux/nfsd/state.h>
54 #include <linux/nfsd/xdr4.h>
55 #include <linux/nfsd_idmap.h>
56 #include <linux/nfs4.h>
57 #include <linux/nfs4_acl.h>
58 #include <linux/sunrpc/gss_api.h>
59 #include <linux/sunrpc/svcauth_gss.h>
61 #define NFSDDBG_FACILITY NFSDDBG_XDR
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
68 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72 check_filename(char *str, int len, __be32 err)
78 if (isdotent(str, len))
80 for (i = 0; i < len; i++)
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __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 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
131 p += XDR_QUADLEN(nbytes); \
133 #define COPYMEM(x,nbytes) do { \
134 memcpy((x), p, nbytes); \
135 p += XDR_QUADLEN(nbytes); \
138 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
139 #define READ_BUF(nbytes) do { \
140 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
142 argp->p += XDR_QUADLEN(nbytes); \
143 } else if (!(p = read_buf(argp, nbytes))) { \
144 dprintk("NFSD: xdr error (%s:%d)\n", \
145 __FILE__, __LINE__); \
150 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
155 unsigned int avail = (char *)argp->end - (char *)argp->p;
157 if (avail + argp->pagelen < nbytes)
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
176 memcpy(p, argp->p, avail);
177 /* step to next page */
178 argp->p = page_address(argp->pagelist[0]);
180 if (argp->pagelen < PAGE_SIZE) {
181 argp->end = p + (argp->pagelen>>2);
184 argp->end = p + (PAGE_SIZE>>2);
185 argp->pagelen -= PAGE_SIZE;
187 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
188 argp->p += XDR_QUADLEN(nbytes - avail);
192 static int zero_clientid(clientid_t *clid)
194 return (clid->cl_boot == 0) && (clid->cl_id == 0);
198 defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
207 tb->release = release;
208 tb->next = argp->to_free;
213 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
215 if (p == argp->tmp) {
216 p = kmalloc(nbytes, GFP_KERNEL);
219 memcpy(p, argp->tmp, nbytes);
221 BUG_ON(p != argp->tmpp);
224 if (defer_free(argp, kfree, p)) {
232 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
246 READ_BUF(bmlen << 2);
257 static u32 nfsd_attrmask[] = {
258 NFSD_WRITEABLE_ATTRS_WORD0,
259 NFSD_WRITEABLE_ATTRS_WORD1,
260 NFSD_WRITEABLE_ATTRS_WORD2
264 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, u32 *writable,
265 struct iattr *iattr, struct nfs4_acl **acl)
267 int expected_len, len = 0;
274 if ((status = nfsd4_decode_bitmap(argp, bmval)))
278 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
279 * read-only attributes return ERR_INVAL.
281 if ((bmval[0] & ~nfsd_suppattrs0(argp->minorversion)) ||
282 (bmval[1] & ~nfsd_suppattrs1(argp->minorversion)) ||
283 (bmval[2] & ~nfsd_suppattrs2(argp->minorversion)))
284 return nfserr_attrnotsupp;
285 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
286 (bmval[2] & ~writable[2]))
290 READ32(expected_len);
292 if (bmval[0] & FATTR4_WORD0_SIZE) {
295 READ64(iattr->ia_size);
296 iattr->ia_valid |= ATTR_SIZE;
298 if (bmval[0] & FATTR4_WORD0_ACL) {
300 struct nfs4_ace *ace;
302 READ_BUF(4); len += 4;
305 if (nace > NFS4_ACL_MAX)
306 return nfserr_resource;
308 *acl = nfs4_acl_new(nace);
313 defer_free(argp, kfree, *acl);
315 (*acl)->naces = nace;
316 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
317 READ_BUF(16); len += 16;
320 READ32(ace->access_mask);
323 len += XDR_QUADLEN(dummy32) << 2;
324 READMEM(buf, dummy32);
325 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
327 if (ace->whotype != NFS4_ACL_WHO_NAMED)
329 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
330 host_err = nfsd_map_name_to_gid(argp->rqstp,
331 buf, dummy32, &ace->who);
333 host_err = nfsd_map_name_to_uid(argp->rqstp,
334 buf, dummy32, &ace->who);
340 if (bmval[1] & FATTR4_WORD1_MODE) {
343 READ32(iattr->ia_mode);
344 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
345 iattr->ia_valid |= ATTR_MODE;
347 if (bmval[1] & FATTR4_WORD1_OWNER) {
352 len += (XDR_QUADLEN(dummy32) << 2);
353 READMEM(buf, dummy32);
354 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
356 iattr->ia_valid |= ATTR_UID;
358 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
363 len += (XDR_QUADLEN(dummy32) << 2);
364 READMEM(buf, dummy32);
365 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
367 iattr->ia_valid |= ATTR_GID;
369 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
374 case NFS4_SET_TO_CLIENT_TIME:
375 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
376 all 32 bits of 'nseconds'. */
382 READ32(iattr->ia_atime.tv_sec);
383 READ32(iattr->ia_atime.tv_nsec);
384 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
386 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
388 case NFS4_SET_TO_SERVER_TIME:
389 iattr->ia_valid |= ATTR_ATIME;
395 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
400 case NFS4_SET_TO_CLIENT_TIME:
401 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
402 all 32 bits of 'nseconds'. */
408 READ32(iattr->ia_mtime.tv_sec);
409 READ32(iattr->ia_mtime.tv_nsec);
410 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
412 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
414 case NFS4_SET_TO_SERVER_TIME:
415 iattr->ia_valid |= ATTR_MTIME;
421 BUG_ON(bmval[2]); /* no such writeable attr supported yet */
422 if (len != expected_len)
428 status = nfserrno(host_err);
433 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
437 READ_BUF(sizeof(stateid_t));
438 READ32(sid->si_generation);
439 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
445 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
450 READ32(access->ac_req_access);
456 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
460 close->cl_stateowner = NULL;
462 READ32(close->cl_seqid);
463 return nfsd4_decode_stateid(argp, &close->cl_stateid);
470 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
475 READ64(commit->co_offset);
476 READ32(commit->co_count);
482 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
487 READ32(create->cr_type);
488 switch (create->cr_type) {
491 READ32(create->cr_linklen);
492 READ_BUF(create->cr_linklen);
493 SAVEMEM(create->cr_linkname, create->cr_linklen);
498 READ32(create->cr_specdata1);
499 READ32(create->cr_specdata2);
509 READ32(create->cr_namelen);
510 READ_BUF(create->cr_namelen);
511 SAVEMEM(create->cr_name, create->cr_namelen);
512 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
515 status = nfsd4_decode_fattr(argp, create->cr_bmval, nfsd_attrmask,
516 &create->cr_iattr, &create->cr_acl);
524 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
526 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
530 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
532 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
536 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
541 READ32(link->li_namelen);
542 READ_BUF(link->li_namelen);
543 SAVEMEM(link->li_name, link->li_namelen);
544 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
551 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
555 lock->lk_replay_owner = NULL;
557 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
560 READ32(lock->lk_type);
561 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
563 READ32(lock->lk_reclaim);
564 READ64(lock->lk_offset);
565 READ64(lock->lk_length);
566 READ32(lock->lk_is_new);
568 if (lock->lk_is_new) {
570 READ32(lock->lk_new_open_seqid);
571 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
574 READ_BUF(8 + sizeof(clientid_t));
575 READ32(lock->lk_new_lock_seqid);
576 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
577 READ32(lock->lk_new_owner.len);
578 READ_BUF(lock->lk_new_owner.len);
579 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
581 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
585 READ32(lock->lk_old_lock_seqid);
592 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
597 READ32(lockt->lt_type);
598 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
600 READ64(lockt->lt_offset);
601 READ64(lockt->lt_length);
602 COPYMEM(&lockt->lt_clientid, 8);
603 READ32(lockt->lt_owner.len);
604 READ_BUF(lockt->lt_owner.len);
605 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
607 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
613 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
617 locku->lu_stateowner = NULL;
619 READ32(locku->lu_type);
620 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
622 READ32(locku->lu_seqid);
623 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
627 READ64(locku->lu_offset);
628 READ64(locku->lu_length);
634 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
639 READ32(lookup->lo_len);
640 READ_BUF(lookup->lo_len);
641 SAVEMEM(lookup->lo_name, lookup->lo_len);
642 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
649 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
653 memset(open->op_bmval, 0, sizeof(open->op_bmval));
654 open->op_iattr.ia_valid = 0;
655 open->op_stateowner = NULL;
657 /* seqid, share_access, share_deny, clientid, ownerlen */
658 READ_BUF(16 + sizeof(clientid_t));
659 READ32(open->op_seqid);
660 READ32(open->op_share_access);
661 READ32(open->op_share_deny);
662 COPYMEM(&open->op_clientid, sizeof(clientid_t));
663 READ32(open->op_owner.len);
665 /* owner, open_flag */
666 READ_BUF(open->op_owner.len + 4);
667 SAVEMEM(open->op_owner.data, open->op_owner.len);
668 READ32(open->op_create);
669 switch (open->op_create) {
670 case NFS4_OPEN_NOCREATE:
672 case NFS4_OPEN_CREATE:
674 READ32(open->op_createmode);
675 switch (open->op_createmode) {
676 case NFS4_CREATE_UNCHECKED:
677 case NFS4_CREATE_GUARDED:
678 status = nfsd4_decode_fattr(argp, open->op_bmval,
679 nfsd_attrmask, &open->op_iattr, &open->op_acl);
683 case NFS4_CREATE_EXCLUSIVE:
685 COPYMEM(open->op_verf.data, 8);
697 READ32(open->op_claim_type);
698 switch (open->op_claim_type) {
699 case NFS4_OPEN_CLAIM_NULL:
700 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
702 READ32(open->op_fname.len);
703 READ_BUF(open->op_fname.len);
704 SAVEMEM(open->op_fname.data, open->op_fname.len);
705 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
708 case NFS4_OPEN_CLAIM_PREVIOUS:
710 READ32(open->op_delegate_type);
712 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
713 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
717 READ32(open->op_fname.len);
718 READ_BUF(open->op_fname.len);
719 SAVEMEM(open->op_fname.data, open->op_fname.len);
720 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
731 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
735 open_conf->oc_stateowner = NULL;
736 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
740 READ32(open_conf->oc_seqid);
746 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
750 open_down->od_stateowner = NULL;
751 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
755 READ32(open_down->od_seqid);
756 READ32(open_down->od_share_access);
757 READ32(open_down->od_share_deny);
763 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
768 READ32(putfh->pf_fhlen);
769 if (putfh->pf_fhlen > NFS4_FHSIZE)
771 READ_BUF(putfh->pf_fhlen);
772 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
778 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
782 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
786 READ64(read->rd_offset);
787 READ32(read->rd_length);
793 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
798 READ64(readdir->rd_cookie);
799 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
800 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
801 READ32(readdir->rd_maxcount);
802 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
809 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
814 READ32(remove->rm_namelen);
815 READ_BUF(remove->rm_namelen);
816 SAVEMEM(remove->rm_name, remove->rm_namelen);
817 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
824 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
829 READ32(rename->rn_snamelen);
830 READ_BUF(rename->rn_snamelen + 4);
831 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
832 READ32(rename->rn_tnamelen);
833 READ_BUF(rename->rn_tnamelen);
834 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
835 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
837 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
844 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
848 READ_BUF(sizeof(clientid_t));
849 COPYMEM(clientid, sizeof(clientid_t));
855 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
856 struct nfsd4_secinfo *secinfo)
861 READ32(secinfo->si_namelen);
862 READ_BUF(secinfo->si_namelen);
863 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
864 status = check_filename(secinfo->si_name, secinfo->si_namelen,
872 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
876 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
879 return nfsd4_decode_fattr(argp, setattr->sa_bmval, nfsd_attrmask,
880 &setattr->sa_iattr, &setattr->sa_acl);
884 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
889 COPYMEM(setclientid->se_verf.data, 8);
890 READ32(setclientid->se_namelen);
892 READ_BUF(setclientid->se_namelen + 8);
893 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
894 READ32(setclientid->se_callback_prog);
895 READ32(setclientid->se_callback_netid_len);
897 READ_BUF(setclientid->se_callback_netid_len + 4);
898 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
899 READ32(setclientid->se_callback_addr_len);
901 READ_BUF(setclientid->se_callback_addr_len + 4);
902 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
903 READ32(setclientid->se_callback_ident);
909 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
913 READ_BUF(8 + sizeof(nfs4_verifier));
914 COPYMEM(&scd_c->sc_clientid, 8);
915 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
920 /* Also used for NVERIFY */
922 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
925 struct nfsd4_compoundargs save = {
928 .rqstp = argp->rqstp,
931 struct iattr ve_iattr; /* request */
932 struct nfs4_acl *ve_acl; /* request */
936 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
939 /* For convenience's sake, we compare raw xdr'd attributes in
940 * nfsd4_proc_verify; however we still decode here just to return
941 * correct error in case of bad xdr. */
943 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
944 if (status == nfserr_inval) {
945 status = nfserrno(status);
950 READ32(verify->ve_attrlen);
951 READ_BUF(verify->ve_attrlen);
952 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
958 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
965 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
969 READ64(write->wr_offset);
970 READ32(write->wr_stable_how);
971 if (write->wr_stable_how > 2)
973 READ32(write->wr_buflen);
975 /* Sorry .. no magic macros for this.. *
976 * READ_BUF(write->wr_buflen);
977 * SAVEMEM(write->wr_buf, write->wr_buflen);
979 avail = (char*)argp->end - (char*)argp->p;
980 if (avail + argp->pagelen < write->wr_buflen) {
981 dprintk("NFSD: xdr error (%s:%d)\n",
985 argp->rqstp->rq_vec[0].iov_base = p;
986 argp->rqstp->rq_vec[0].iov_len = avail;
988 len = write->wr_buflen;
989 while (len > argp->rqstp->rq_vec[v].iov_len) {
990 len -= argp->rqstp->rq_vec[v].iov_len;
992 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
994 if (argp->pagelen >= PAGE_SIZE) {
995 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
996 argp->pagelen -= PAGE_SIZE;
998 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
999 argp->pagelen -= len;
1002 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1003 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1004 argp->rqstp->rq_vec[v].iov_len = len;
1005 write->wr_vlen = v+1;
1011 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1016 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1017 READ32(rlockowner->rl_owner.len);
1018 READ_BUF(rlockowner->rl_owner.len);
1019 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1021 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1022 return nfserr_inval;
1027 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1028 struct nfsd4_exchange_id *exid)
1033 READ_BUF(NFS4_VERIFIER_SIZE);
1034 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1037 READ32(exid->clname.len);
1039 READ_BUF(exid->clname.len);
1040 SAVEMEM(exid->clname.data, exid->clname.len);
1043 READ32(exid->flags);
1045 /* Ignore state_protect4_a */
1047 READ32(exid->spa_how);
1048 switch (exid->spa_how) {
1052 /* spo_must_enforce */
1055 READ_BUF(dummy * 4);
1058 /* spo_must_allow */
1061 READ_BUF(dummy * 4);
1068 READ_BUF(dummy * 4);
1073 READ_BUF(dummy * 4);
1076 /* ssp_hash_algs<> */
1080 p += XDR_QUADLEN(dummy);
1082 /* ssp_encr_algs<> */
1086 p += XDR_QUADLEN(dummy);
1088 /* ssp_window and ssp_num_gss_handles */
1097 /* Ignore Implementation ID */
1098 READ_BUF(4); /* nfs_impl_id4 array length */
1109 p += XDR_QUADLEN(dummy);
1115 p += XDR_QUADLEN(dummy);
1125 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1126 struct nfsd4_create_session *sess)
1136 COPYMEM(&sess->clientid, 8);
1137 READ32(sess->seqid);
1138 READ32(sess->flags);
1140 /* Fore channel attrs */
1142 READ32(dummy); /* headerpadsz is always 0 */
1143 READ32(sess->fore_channel.maxreq_sz);
1144 READ32(sess->fore_channel.maxresp_sz);
1145 READ32(sess->fore_channel.maxresp_cached);
1146 READ32(sess->fore_channel.maxops);
1147 READ32(sess->fore_channel.maxreqs);
1148 READ32(sess->fore_channel.nr_rdma_attrs);
1149 if (sess->fore_channel.nr_rdma_attrs == 1) {
1151 READ32(sess->fore_channel.rdma_attrs);
1152 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1153 dprintk("Too many fore channel attr bitmaps!\n");
1157 /* Back channel attrs */
1159 READ32(dummy); /* headerpadsz is always 0 */
1160 READ32(sess->back_channel.maxreq_sz);
1161 READ32(sess->back_channel.maxresp_sz);
1162 READ32(sess->back_channel.maxresp_cached);
1163 READ32(sess->back_channel.maxops);
1164 READ32(sess->back_channel.maxreqs);
1165 READ32(sess->back_channel.nr_rdma_attrs);
1166 if (sess->back_channel.nr_rdma_attrs == 1) {
1168 READ32(sess->back_channel.rdma_attrs);
1169 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1170 dprintk("Too many back channel attr bitmaps!\n");
1175 READ32(sess->callback_prog);
1177 /* callback_sec_params4 */
1178 READ32(nr_secflavs);
1179 for (i = 0; i < nr_secflavs; ++i) {
1184 /* Nothing to read */
1194 SAVEMEM(machine_name, dummy);
1204 READ_BUF(dummy * 4);
1205 for (i = 0; i < dummy; ++i)
1209 dprintk("RPC_AUTH_GSS callback secflavor "
1210 "not supported!\n");
1214 /* gcbp_handle_from_server */
1217 p += XDR_QUADLEN(dummy);
1218 /* gcbp_handle_from_client */
1222 p += XDR_QUADLEN(dummy);
1225 dprintk("Illegal callback secflavor\n");
1226 return nfserr_inval;
1233 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1234 struct nfsd4_destroy_session *destroy_session)
1237 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1238 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1244 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1245 struct nfsd4_sequence *seq)
1249 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1250 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1252 READ32(seq->slotid);
1253 READ32(seq->maxslots);
1254 READ32(seq->cachethis);
1260 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1266 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1268 return nfserr_notsupp;
1271 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1273 static nfsd4_dec nfsd4_dec_ops[] = {
1274 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1275 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1276 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1277 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1278 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1279 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1280 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1281 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1282 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1283 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1284 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1285 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1286 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1287 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1288 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1289 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1290 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1291 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1292 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1293 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1294 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1295 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1296 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1297 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1298 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1299 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1300 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1301 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1302 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1303 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1304 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1305 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1306 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1307 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1308 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1309 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1310 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1313 static nfsd4_dec nfsd41_dec_ops[] = {
1314 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1315 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1316 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1317 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1318 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1319 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1320 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1321 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1322 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1323 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1324 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1325 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1326 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1327 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1328 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1329 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1330 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1331 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1332 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1333 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1334 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1335 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1336 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1337 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1338 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1339 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1340 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1341 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1343 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1344 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1345 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1346 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1349 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1350 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1352 /* new operations for NFSv4.1 */
1353 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1356 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1357 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1358 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1359 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1360 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1361 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1362 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1363 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1364 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1365 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1366 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1367 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1368 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1369 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1370 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1374 struct nfsd4_minorversion_ops {
1375 nfsd4_dec *decoders;
1379 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1380 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1381 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1385 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1388 struct nfsd4_op *op;
1389 struct nfsd4_minorversion_ops *ops;
1393 * XXX: According to spec, we should check the tag
1394 * for UTF-8 compliance. I'm postponing this for
1395 * now because it seems that some clients do use
1399 READ32(argp->taglen);
1400 READ_BUF(argp->taglen + 8);
1401 SAVEMEM(argp->tag, argp->taglen);
1402 READ32(argp->minorversion);
1403 READ32(argp->opcnt);
1405 if (argp->taglen > NFSD4_MAX_TAGLEN)
1407 if (argp->opcnt > 100)
1410 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1411 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1413 argp->ops = argp->iops;
1414 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1419 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1422 ops = &nfsd4_minorversion[argp->minorversion];
1423 for (i = 0; i < argp->opcnt; i++) {
1428 * We can't use READ_BUF() here because we need to handle
1429 * a missing opcode as an OP_WRITE + 1. So we need to check
1430 * to see if we're truly at the end of our buffer or if there
1431 * is another page we need to flip to.
1434 if (argp->p == argp->end) {
1435 if (argp->pagelen < 4) {
1436 /* There isn't an opcode still on the wire */
1437 op->opnum = OP_WRITE + 1;
1438 op->status = nfserr_bad_xdr;
1444 * False alarm. We just hit a page boundary, but there
1445 * is still data available. Move pointer across page
1446 * boundary. *snip from READ_BUF*
1448 argp->p = page_address(argp->pagelist[0]);
1450 if (argp->pagelen < PAGE_SIZE) {
1451 argp->end = p + (argp->pagelen>>2);
1454 argp->end = p + (PAGE_SIZE>>2);
1455 argp->pagelen -= PAGE_SIZE;
1458 op->opnum = ntohl(*argp->p++);
1460 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1461 op->status = ops->decoders[op->opnum](argp, &op->u);
1463 op->opnum = OP_ILLEGAL;
1464 op->status = nfserr_op_illegal;
1476 * END OF "GENERIC" DECODE ROUTINES.
1480 * START OF "GENERIC" ENCODE ROUTINES.
1481 * These may look a little ugly since they are imported from a "generic"
1482 * set of XDR encode/decode routines which are intended to be shared by
1483 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1485 * If the pain of reading these is too great, it should be a straightforward
1486 * task to translate them into Linux-specific versions which are more
1487 * consistent with the style used in NFSv2/v3...
1489 #define ENCODE_HEAD __be32 *p
1491 #define WRITE32(n) *p++ = htonl(n)
1492 #define WRITE64(n) do { \
1493 *p++ = htonl((u32)((n) >> 32)); \
1494 *p++ = htonl((u32)(n)); \
1496 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1497 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1498 memcpy(p, ptr, nbytes); \
1499 p += XDR_QUADLEN(nbytes); \
1501 #define WRITECINFO(c) do { \
1502 *p++ = htonl(c.atomic); \
1503 *p++ = htonl(c.before_ctime_sec); \
1504 *p++ = htonl(c.before_ctime_nsec); \
1505 *p++ = htonl(c.after_ctime_sec); \
1506 *p++ = htonl(c.after_ctime_nsec); \
1509 #define RESERVE_SPACE(nbytes) do { \
1511 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1513 #define ADJUST_ARGS() resp->p = p
1516 * Header routine to setup seqid operation replay cache
1518 #define ENCODE_SEQID_OP_HEAD \
1524 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1525 * is where sequence id's are incremented, and the replay cache is filled.
1526 * Note that we increment sequence id's here, at the last moment, so we're sure
1527 * we know whether the error to be returned is a sequence id mutating error.
1530 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1531 if (seqid_mutating_err(nfserr) && stateowner) { \
1532 stateowner->so_seqid++; \
1533 stateowner->so_replay.rp_status = nfserr; \
1534 stateowner->so_replay.rp_buflen = \
1535 (((char *)(resp)->p - (char *)save)); \
1536 memcpy(stateowner->so_replay.rp_buf, save, \
1537 stateowner->so_replay.rp_buflen); \
1540 /* Encode as an array of strings the string given with components
1543 static __be32 nfsd4_encode_components(char sep, char *components,
1544 __be32 **pp, int *buflen)
1548 int strlen, count=0;
1551 dprintk("nfsd4_encode_components(%s)\n", components);
1552 if ((*buflen -= 4) < 0)
1553 return nfserr_resource;
1554 WRITE32(0); /* We will fill this in with @count later */
1555 end = str = components;
1557 for (; *end && (*end != sep); end++)
1558 ; /* Point to end of component */
1561 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1562 return nfserr_resource;
1564 WRITEMEM(str, strlen);
1578 * encode a location element of a fs_locations structure
1580 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1581 __be32 **pp, int *buflen)
1586 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1589 status = nfsd4_encode_components('/', location->path, &p, buflen);
1597 * Return the path to an export point in the pseudo filesystem namespace
1598 * Returned string is safe to use as long as the caller holds a reference
1601 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1603 struct svc_fh tmp_fh;
1604 char *path, *rootpath;
1606 fh_init(&tmp_fh, NFS4_FHSIZE);
1607 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1610 rootpath = tmp_fh.fh_export->ex_pathname;
1612 path = exp->ex_pathname;
1614 if (strncmp(path, rootpath, strlen(rootpath))) {
1615 dprintk("nfsd: fs_locations failed;"
1616 "%s is not contained in %s\n", path, rootpath);
1617 *stat = nfserr_notsupp;
1621 return path + strlen(rootpath);
1625 * encode a fs_locations structure
1627 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1628 struct svc_export *exp,
1629 __be32 **pp, int *buflen)
1634 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1635 char *root = nfsd4_path(rqstp, exp, &status);
1639 status = nfsd4_encode_components('/', root, &p, buflen);
1642 if ((*buflen -= 4) < 0)
1643 return nfserr_resource;
1644 WRITE32(fslocs->locations_count);
1645 for (i=0; i<fslocs->locations_count; i++) {
1646 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1655 static u32 nfs4_ftypes[16] = {
1656 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1657 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1658 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1659 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1663 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1664 __be32 **p, int *buflen)
1668 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1669 return nfserr_resource;
1670 if (whotype != NFS4_ACL_WHO_NAMED)
1671 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1673 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1675 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1677 return nfserrno(status);
1678 *p = xdr_encode_opaque(*p, NULL, status);
1679 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1680 BUG_ON(*buflen < 0);
1684 static inline __be32
1685 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1687 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1690 static inline __be32
1691 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1693 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1696 static inline __be32
1697 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1698 __be32 **p, int *buflen)
1700 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1703 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1704 FATTR4_WORD0_RDATTR_ERROR)
1705 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1707 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1709 /* As per referral draft: */
1710 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1711 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1712 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1713 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1714 *rdattr_err = NFSERR_MOVED;
1716 return nfserr_moved;
1718 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1719 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1724 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1727 * @countp is the buffer size in _words_; upon successful return this becomes
1728 * replaced with the number of words written.
1731 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1732 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1733 struct svc_rqst *rqstp, int ignore_crossmnt)
1735 u32 bmval0 = bmval[0];
1736 u32 bmval1 = bmval[1];
1737 u32 bmval2 = bmval[2];
1739 struct svc_fh tempfh;
1740 struct kstatfs statfs;
1741 int buflen = *countp << 2;
1750 struct nfs4_acl *acl = NULL;
1751 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1752 u32 minorversion = resp->cstate.minorversion;
1754 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1755 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1756 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1757 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1759 if (exp->ex_fslocs.migrated) {
1761 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1766 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1769 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1770 FATTR4_WORD0_MAXNAME)) ||
1771 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1772 FATTR4_WORD1_SPACE_TOTAL))) {
1773 err = vfs_statfs(dentry, &statfs);
1777 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1778 fh_init(&tempfh, NFS4_FHSIZE);
1779 status = fh_compose(&tempfh, exp, dentry, NULL);
1784 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1785 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1786 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1787 aclsupport = (err == 0);
1788 if (bmval0 & FATTR4_WORD0_ACL) {
1789 if (err == -EOPNOTSUPP)
1790 bmval0 &= ~FATTR4_WORD0_ACL;
1791 else if (err == -EINVAL) {
1792 status = nfserr_attrnotsupp;
1794 } else if (err != 0)
1798 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1799 if (exp->ex_fslocs.locations == NULL) {
1800 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1803 if ((buflen -= 16) < 0)
1806 if (unlikely(bmval2)) {
1811 } else if (likely(bmval1)) {
1819 attrlenp = p++; /* to be backfilled later */
1821 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1822 u32 word0 = nfsd_suppattrs0(minorversion);
1823 u32 word1 = nfsd_suppattrs1(minorversion);
1824 u32 word2 = nfsd_suppattrs2(minorversion);
1826 if ((buflen -= 12) < 0)
1829 word0 &= ~FATTR4_WORD0_ACL;
1830 if (!exp->ex_fslocs.locations)
1831 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1843 if (bmval0 & FATTR4_WORD0_TYPE) {
1844 if ((buflen -= 4) < 0)
1846 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1847 if (dummy == NF4BAD)
1848 goto out_serverfault;
1851 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1852 if ((buflen -= 4) < 0)
1854 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1855 WRITE32(NFS4_FH_PERSISTENT);
1857 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1859 if (bmval0 & FATTR4_WORD0_CHANGE) {
1861 * Note: This _must_ be consistent with the scheme for writing
1862 * change_info, so any changes made here must be reflected there
1863 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1866 if ((buflen -= 8) < 0)
1868 WRITE32(stat.ctime.tv_sec);
1869 WRITE32(stat.ctime.tv_nsec);
1871 if (bmval0 & FATTR4_WORD0_SIZE) {
1872 if ((buflen -= 8) < 0)
1876 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1877 if ((buflen -= 4) < 0)
1881 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1882 if ((buflen -= 4) < 0)
1886 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1887 if ((buflen -= 4) < 0)
1891 if (bmval0 & FATTR4_WORD0_FSID) {
1892 if ((buflen -= 16) < 0)
1894 if (exp->ex_fslocs.migrated) {
1895 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1896 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1897 } else switch(fsid_source(fhp)) {
1898 case FSIDSOURCE_FSID:
1899 WRITE64((u64)exp->ex_fsid);
1902 case FSIDSOURCE_DEV:
1904 WRITE32(MAJOR(stat.dev));
1906 WRITE32(MINOR(stat.dev));
1908 case FSIDSOURCE_UUID:
1909 WRITEMEM(exp->ex_uuid, 16);
1913 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1914 if ((buflen -= 4) < 0)
1918 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1919 if ((buflen -= 4) < 0)
1921 WRITE32(NFSD_LEASE_TIME);
1923 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1924 if ((buflen -= 4) < 0)
1926 WRITE32(rdattr_err);
1928 if (bmval0 & FATTR4_WORD0_ACL) {
1929 struct nfs4_ace *ace;
1932 if ((buflen -= 4) < 0)
1938 if ((buflen -= 4) < 0)
1940 WRITE32(acl->naces);
1942 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1943 if ((buflen -= 4*3) < 0)
1947 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1948 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1949 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1951 if (status == nfserr_resource)
1958 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1959 if ((buflen -= 4) < 0)
1961 WRITE32(aclsupport ?
1962 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1964 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1965 if ((buflen -= 4) < 0)
1969 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1970 if ((buflen -= 4) < 0)
1974 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1975 if ((buflen -= 4) < 0)
1979 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1980 if ((buflen -= 4) < 0)
1984 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1985 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1988 WRITE32(fhp->fh_handle.fh_size);
1989 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1991 if (bmval0 & FATTR4_WORD0_FILEID) {
1992 if ((buflen -= 8) < 0)
1996 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1997 if ((buflen -= 8) < 0)
1999 WRITE64((u64) statfs.f_ffree);
2001 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2002 if ((buflen -= 8) < 0)
2004 WRITE64((u64) statfs.f_ffree);
2006 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2007 if ((buflen -= 8) < 0)
2009 WRITE64((u64) statfs.f_files);
2011 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2012 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2013 if (status == nfserr_resource)
2018 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2019 if ((buflen -= 4) < 0)
2023 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2024 if ((buflen -= 8) < 0)
2028 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2029 if ((buflen -= 4) < 0)
2033 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2034 if ((buflen -= 4) < 0)
2036 WRITE32(statfs.f_namelen);
2038 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2039 if ((buflen -= 8) < 0)
2041 WRITE64((u64) svc_max_payload(rqstp));
2043 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2044 if ((buflen -= 8) < 0)
2046 WRITE64((u64) svc_max_payload(rqstp));
2048 if (bmval1 & FATTR4_WORD1_MODE) {
2049 if ((buflen -= 4) < 0)
2051 WRITE32(stat.mode & S_IALLUGO);
2053 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2054 if ((buflen -= 4) < 0)
2058 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2059 if ((buflen -= 4) < 0)
2061 WRITE32(stat.nlink);
2063 if (bmval1 & FATTR4_WORD1_OWNER) {
2064 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2065 if (status == nfserr_resource)
2070 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2071 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2072 if (status == nfserr_resource)
2077 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2078 if ((buflen -= 8) < 0)
2080 WRITE32((u32) MAJOR(stat.rdev));
2081 WRITE32((u32) MINOR(stat.rdev));
2083 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2084 if ((buflen -= 8) < 0)
2086 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2089 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2090 if ((buflen -= 8) < 0)
2092 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2095 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2096 if ((buflen -= 8) < 0)
2098 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2101 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2102 if ((buflen -= 8) < 0)
2104 dummy64 = (u64)stat.blocks << 9;
2107 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2108 if ((buflen -= 12) < 0)
2111 WRITE32(stat.atime.tv_sec);
2112 WRITE32(stat.atime.tv_nsec);
2114 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2115 if ((buflen -= 12) < 0)
2121 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2122 if ((buflen -= 12) < 0)
2125 WRITE32(stat.ctime.tv_sec);
2126 WRITE32(stat.ctime.tv_nsec);
2128 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2129 if ((buflen -= 12) < 0)
2132 WRITE32(stat.mtime.tv_sec);
2133 WRITE32(stat.mtime.tv_nsec);
2135 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2136 if ((buflen -= 8) < 0)
2139 * Get parent's attributes if not ignoring crossmount
2140 * and this is the root of a cross-mounted filesystem.
2142 if (ignore_crossmnt == 0 &&
2143 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2144 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2145 exp->ex_path.mnt->mnt_mountpoint, &stat);
2151 BUG_ON(bmval2); /* FIXME: not implemented yet */
2153 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2154 *countp = p - buffer;
2163 status = nfserrno(err);
2167 status = nfserr_resource;
2170 status = nfserr_serverfault;
2174 static inline int attributes_need_mount(u32 *bmval)
2176 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2178 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2184 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2185 const char *name, int namlen, __be32 *p, int *buflen)
2187 struct svc_export *exp = cd->rd_fhp->fh_export;
2188 struct dentry *dentry;
2190 int ignore_crossmnt = 0;
2192 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2194 return nfserrno(PTR_ERR(dentry));
2198 * In the case of a mountpoint, the client may be asking for
2199 * attributes that are only properties of the underlying filesystem
2200 * as opposed to the cross-mounted file system. In such a case,
2201 * we will not follow the cross mount and will fill the attribtutes
2202 * directly from the mountpoint dentry.
2204 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2205 ignore_crossmnt = 1;
2206 else if (d_mountpoint(dentry)) {
2210 * Why the heck aren't we just using nfsd_lookup??
2211 * Different "."/".." handling? Something else?
2212 * At least, add a comment here to explain....
2214 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2216 nfserr = nfserrno(err);
2219 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2224 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2225 cd->rd_rqstp, ignore_crossmnt);
2233 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2240 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2241 *p++ = htonl(0); /* bmval1 */
2244 *p++ = nfserr; /* no htonl */
2245 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2250 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2251 loff_t offset, u64 ino, unsigned int d_type)
2253 struct readdir_cd *ccd = ccdv;
2254 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2256 __be32 *p = cd->buffer;
2257 __be32 nfserr = nfserr_toosmall;
2259 /* In nfsv4, "." and ".." never make it onto the wire.. */
2260 if (name && isdotent(name, namlen)) {
2261 cd->common.err = nfs_ok;
2266 xdr_encode_hyper(cd->offset, (u64) offset);
2268 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2272 *p++ = xdr_one; /* mark entry present */
2273 cd->offset = p; /* remember pointer */
2274 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2275 p = xdr_encode_array(p, name, namlen); /* name length & name */
2277 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2282 case nfserr_resource:
2283 nfserr = nfserr_toosmall;
2289 * If the client requested the RDATTR_ERROR attribute,
2290 * we stuff the error code into this attribute
2291 * and continue. If this attribute was not requested,
2292 * then in accordance with the spec, we fail the
2293 * entire READDIR operation(!)
2295 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2297 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2299 nfserr = nfserr_toosmall;
2303 cd->buflen -= (p - cd->buffer);
2305 cd->common.err = nfs_ok;
2308 cd->common.err = nfserr;
2313 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2317 RESERVE_SPACE(sizeof(stateid_t));
2318 WRITE32(sid->si_generation);
2319 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2324 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2330 WRITE32(access->ac_supported);
2331 WRITE32(access->ac_resp_access);
2338 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2340 ENCODE_SEQID_OP_HEAD;
2343 nfsd4_encode_stateid(resp, &close->cl_stateid);
2345 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2351 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2357 WRITEMEM(commit->co_verf.data, 8);
2364 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2370 WRITECINFO(create->cr_cinfo);
2372 WRITE32(create->cr_bmval[0]);
2373 WRITE32(create->cr_bmval[1]);
2380 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2382 struct svc_fh *fhp = getattr->ga_fhp;
2388 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2389 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2390 resp->p, &buflen, getattr->ga_bmval,
2398 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2400 struct svc_fh *fhp = *fhpp;
2405 len = fhp->fh_handle.fh_size;
2406 RESERVE_SPACE(len + 4);
2408 WRITEMEM(&fhp->fh_handle.fh_base, len);
2415 * Including all fields other than the name, a LOCK4denied structure requires
2416 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2419 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2423 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2424 WRITE64(ld->ld_start);
2425 WRITE64(ld->ld_length);
2426 WRITE32(ld->ld_type);
2428 WRITEMEM(&ld->ld_clientid, 8);
2429 WRITE32(ld->ld_sop->so_owner.len);
2430 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2431 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2432 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2433 WRITE64((u64)0); /* clientid */
2434 WRITE32(0); /* length of owner name */
2440 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2442 ENCODE_SEQID_OP_HEAD;
2445 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2446 else if (nfserr == nfserr_denied)
2447 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2449 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2454 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2456 if (nfserr == nfserr_denied)
2457 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2462 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2464 ENCODE_SEQID_OP_HEAD;
2467 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2469 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2475 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2481 WRITECINFO(link->li_cinfo);
2489 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2492 ENCODE_SEQID_OP_HEAD;
2497 nfsd4_encode_stateid(resp, &open->op_stateid);
2499 WRITECINFO(open->op_cinfo);
2500 WRITE32(open->op_rflags);
2502 WRITE32(open->op_bmval[0]);
2503 WRITE32(open->op_bmval[1]);
2504 WRITE32(open->op_delegate_type);
2507 switch (open->op_delegate_type) {
2508 case NFS4_OPEN_DELEGATE_NONE:
2510 case NFS4_OPEN_DELEGATE_READ:
2511 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2513 WRITE32(open->op_recall);
2516 * TODO: ACE's in delegations
2518 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2521 WRITE32(0); /* XXX: is NULL principal ok? */
2524 case NFS4_OPEN_DELEGATE_WRITE:
2525 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2530 * TODO: space_limit's in delegations
2532 WRITE32(NFS4_LIMIT_SIZE);
2537 * TODO: ACE's in delegations
2539 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2542 WRITE32(0); /* XXX: is NULL principal ok? */
2548 /* XXX save filehandle here */
2550 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2555 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2557 ENCODE_SEQID_OP_HEAD;
2560 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2562 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2567 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2569 ENCODE_SEQID_OP_HEAD;
2572 nfsd4_encode_stateid(resp, &od->od_stateid);
2574 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2579 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2580 struct nfsd4_read *read)
2584 unsigned long maxcount;
2590 if (resp->xbuf->page_len)
2591 return nfserr_resource;
2593 RESERVE_SPACE(8); /* eof flag and byte count */
2595 maxcount = svc_max_payload(resp->rqstp);
2596 if (maxcount > read->rd_length)
2597 maxcount = read->rd_length;
2602 pn = resp->rqstp->rq_resused++;
2603 resp->rqstp->rq_vec[v].iov_base =
2604 page_address(resp->rqstp->rq_respages[pn]);
2605 resp->rqstp->rq_vec[v].iov_len =
2606 len < PAGE_SIZE ? len : PAGE_SIZE;
2612 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2613 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2616 if (nfserr == nfserr_symlink)
2617 nfserr = nfserr_inval;
2620 eof = (read->rd_offset + maxcount >=
2621 read->rd_fhp->fh_dentry->d_inode->i_size);
2626 resp->xbuf->head[0].iov_len = (char*)p
2627 - (char*)resp->xbuf->head[0].iov_base;
2628 resp->xbuf->page_len = maxcount;
2630 /* Use rest of head for padding and remaining ops: */
2631 resp->xbuf->tail[0].iov_base = p;
2632 resp->xbuf->tail[0].iov_len = 0;
2636 resp->xbuf->tail[0].iov_base += maxcount&3;
2637 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2644 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2652 if (resp->xbuf->page_len)
2653 return nfserr_resource;
2655 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2657 maxcount = PAGE_SIZE;
2661 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2662 * if they would overflow the buffer. Is this kosher in NFSv4? If
2663 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2664 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2666 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2667 if (nfserr == nfserr_isdir)
2668 return nfserr_inval;
2674 resp->xbuf->head[0].iov_len = (char*)p
2675 - (char*)resp->xbuf->head[0].iov_base;
2676 resp->xbuf->page_len = maxcount;
2678 /* Use rest of head for padding and remaining ops: */
2679 resp->xbuf->tail[0].iov_base = p;
2680 resp->xbuf->tail[0].iov_len = 0;
2684 resp->xbuf->tail[0].iov_base += maxcount&3;
2685 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2692 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2696 __be32 *page, *savep, *tailbase;
2701 if (resp->xbuf->page_len)
2702 return nfserr_resource;
2704 RESERVE_SPACE(8); /* verifier */
2707 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2711 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2714 maxcount = PAGE_SIZE;
2715 if (maxcount > readdir->rd_maxcount)
2716 maxcount = readdir->rd_maxcount;
2719 * Convert from bytes to words, account for the two words already
2720 * written, make sure to leave two words at the end for the next
2721 * pointer and eof field.
2723 maxcount = (maxcount >> 2) - 4;
2725 nfserr = nfserr_toosmall;
2729 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2730 readdir->common.err = 0;
2731 readdir->buflen = maxcount;
2732 readdir->buffer = page;
2733 readdir->offset = NULL;
2735 offset = readdir->rd_cookie;
2736 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2738 &readdir->common, nfsd4_encode_dirent);
2739 if (nfserr == nfs_ok &&
2740 readdir->common.err == nfserr_toosmall &&
2741 readdir->buffer == page)
2742 nfserr = nfserr_toosmall;
2743 if (nfserr == nfserr_symlink)
2744 nfserr = nfserr_notdir;
2748 if (readdir->offset)
2749 xdr_encode_hyper(readdir->offset, offset);
2751 p = readdir->buffer;
2752 *p++ = 0; /* no more entries */
2753 *p++ = htonl(readdir->common.err == nfserr_eof);
2754 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2755 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2757 /* Use rest of head for padding and remaining ops: */
2758 resp->xbuf->tail[0].iov_base = tailbase;
2759 resp->xbuf->tail[0].iov_len = 0;
2760 resp->p = resp->xbuf->tail[0].iov_base;
2761 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2771 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2777 WRITECINFO(remove->rm_cinfo);
2784 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2790 WRITECINFO(rename->rn_sinfo);
2791 WRITECINFO(rename->rn_tinfo);
2798 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2799 struct nfsd4_secinfo *secinfo)
2802 struct svc_export *exp = secinfo->si_exp;
2804 struct exp_flavor_info *flavs;
2805 struct exp_flavor_info def_flavs[2];
2810 if (exp->ex_nflavors) {
2811 flavs = exp->ex_flavors;
2812 nflavs = exp->ex_nflavors;
2813 } else { /* Handling of some defaults in absence of real secinfo: */
2815 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2817 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2818 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2819 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2821 flavs[0].pseudoflavor
2822 = svcauth_gss_flavor(exp->ex_client);
2825 flavs[0].pseudoflavor
2826 = exp->ex_client->flavour->flavour;
2833 for (i = 0; i < nflavs; i++) {
2834 u32 flav = flavs[i].pseudoflavor;
2835 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2839 WRITE32(RPC_AUTH_GSS);
2841 RESERVE_SPACE(4 + gm->gm_oid.len);
2842 WRITE32(gm->gm_oid.len);
2843 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2846 WRITE32(0); /* qop */
2849 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2865 * The SETATTR encode routine is special -- it always encodes a bitmap,
2866 * regardless of the error status.
2869 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2881 WRITE32(setattr->sa_bmval[0]);
2882 WRITE32(setattr->sa_bmval[1]);
2889 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2894 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2895 WRITEMEM(&scd->se_clientid, 8);
2896 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2899 else if (nfserr == nfserr_clid_inuse) {
2909 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2915 WRITE32(write->wr_bytes_written);
2916 WRITE32(write->wr_how_written);
2917 WRITEMEM(write->wr_verifier.data, 8);
2924 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2925 struct nfsd4_exchange_id *exid)
2931 int server_scope_sz;
2932 uint64_t minor_id = 0;
2937 major_id = utsname()->nodename;
2938 major_id_sz = strlen(major_id);
2939 server_scope = utsname()->nodename;
2940 server_scope_sz = strlen(server_scope);
2943 8 /* eir_clientid */ +
2944 4 /* eir_sequenceid */ +
2946 4 /* spr_how (SP4_NONE) */ +
2947 8 /* so_minor_id */ +
2948 4 /* so_major_id.len */ +
2949 (XDR_QUADLEN(major_id_sz) * 4) +
2950 4 /* eir_server_scope.len */ +
2951 (XDR_QUADLEN(server_scope_sz) * 4) +
2952 4 /* eir_server_impl_id.count (0) */);
2954 WRITEMEM(&exid->clientid, 8);
2955 WRITE32(exid->seqid);
2956 WRITE32(exid->flags);
2958 /* state_protect4_r. Currently only support SP4_NONE */
2959 BUG_ON(exid->spa_how != SP4_NONE);
2960 WRITE32(exid->spa_how);
2962 /* The server_owner struct */
2963 WRITE64(minor_id); /* Minor id */
2965 WRITE32(major_id_sz);
2966 WRITEMEM(major_id, major_id_sz);
2969 WRITE32(server_scope_sz);
2970 WRITEMEM(server_scope, server_scope_sz);
2972 /* Implementation id */
2973 WRITE32(0); /* zero length nfs_impl_id4 array */
2979 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2980 struct nfsd4_create_session *sess)
2988 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2989 WRITE32(sess->seqid);
2990 WRITE32(sess->flags);
2994 WRITE32(0); /* headerpadsz */
2995 WRITE32(sess->fore_channel.maxreq_sz);
2996 WRITE32(sess->fore_channel.maxresp_sz);
2997 WRITE32(sess->fore_channel.maxresp_cached);
2998 WRITE32(sess->fore_channel.maxops);
2999 WRITE32(sess->fore_channel.maxreqs);
3000 WRITE32(sess->fore_channel.nr_rdma_attrs);
3003 if (sess->fore_channel.nr_rdma_attrs) {
3005 WRITE32(sess->fore_channel.rdma_attrs);
3010 WRITE32(0); /* headerpadsz */
3011 WRITE32(sess->back_channel.maxreq_sz);
3012 WRITE32(sess->back_channel.maxresp_sz);
3013 WRITE32(sess->back_channel.maxresp_cached);
3014 WRITE32(sess->back_channel.maxops);
3015 WRITE32(sess->back_channel.maxreqs);
3016 WRITE32(sess->back_channel.nr_rdma_attrs);
3019 if (sess->back_channel.nr_rdma_attrs) {
3021 WRITE32(sess->back_channel.rdma_attrs);
3028 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3029 struct nfsd4_destroy_session *destroy_session)
3035 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3036 struct nfsd4_sequence *seq)
3043 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3044 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3045 WRITE32(seq->seqid);
3046 WRITE32(seq->slotid);
3047 WRITE32(seq->maxslots);
3050 * target_maxslots = maxslots
3053 WRITE32(seq->maxslots);
3061 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3066 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3069 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3070 * since we don't need to filter out obsolete ops as this is
3071 * done in the decoding phase.
3073 static nfsd4_enc nfsd4_enc_ops[] = {
3074 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3075 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3076 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3077 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3078 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3079 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3080 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3081 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3082 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3083 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3084 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3085 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3086 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3087 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3088 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3089 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3090 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3091 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3092 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3093 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3094 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3095 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3096 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3097 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3098 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3099 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3100 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3101 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3102 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3103 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3104 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3105 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3106 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3107 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3108 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3109 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3110 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3112 /* NFSv4.1 operations */
3113 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3114 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3115 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3116 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3117 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3118 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3119 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3120 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3121 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3122 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3123 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3124 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3125 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3126 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3127 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3128 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3129 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3130 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3135 * Calculate the total amount of memory that the compound response has taken
3136 * after encoding the current operation.
3138 * pad: add on 8 bytes for the next operation's op_code and status so that
3139 * there is room to cache a failure on the next operation.
3141 * Compare this length to the session se_fmaxresp_cached.
3143 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3144 * will be at least a page and will therefore hold the xdr_buf head.
3146 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3149 struct xdr_buf *xb = &resp->rqstp->rq_res;
3150 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3151 struct nfsd4_session *session = NULL;
3152 struct nfsd4_slot *slot = resp->cstate.slot;
3153 u32 length, tlen = 0, pad = 8;
3155 if (!nfsd4_has_session(&resp->cstate))
3158 session = resp->cstate.session;
3159 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
3162 if (resp->opcnt >= args->opcnt)
3163 pad = 0; /* this is the last operation */
3165 if (xb->page_len == 0) {
3166 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3168 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3169 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3171 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3173 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3174 length, xb->page_len, tlen, pad);
3176 if (length <= session->se_fmaxresp_cached)
3179 return nfserr_rep_too_big_to_cache;
3183 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3190 statp = p++; /* to be backfilled at the end */
3193 if (op->opnum == OP_ILLEGAL)
3195 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3196 !nfsd4_enc_ops[op->opnum]);
3197 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3198 /* nfsd4_check_drc_limit guarantees enough room for error status */
3199 if (!op->status && nfsd4_check_drc_limit(resp))
3200 op->status = nfserr_rep_too_big_to_cache;
3203 * Note: We write the status directly, instead of using WRITE32(),
3204 * since it is already in network byte order.
3206 *statp = op->status;
3210 * Encode the reply stored in the stateowner reply cache
3212 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3213 * previously sent already encoded operation.
3215 * called with nfs4_lock_state() held
3218 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3221 struct nfs4_replay *rp = op->replay;
3227 *p++ = rp->rp_status; /* already xdr'ed */
3230 RESERVE_SPACE(rp->rp_buflen);
3231 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3236 * END OF "GENERIC" ENCODE ROUTINES.
3240 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3242 return xdr_ressize_check(rqstp, p);
3245 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3247 if (args->ops != args->iops) {
3249 args->ops = args->iops;
3253 while (args->to_free) {
3254 struct tmpbuf *tb = args->to_free;
3255 args->to_free = tb->next;
3256 tb->release(tb->buf);
3262 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3267 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3268 args->pagelist = rqstp->rq_arg.pages;
3269 args->pagelen = rqstp->rq_arg.page_len;
3271 args->to_free = NULL;
3272 args->ops = args->iops;
3273 args->rqstp = rqstp;
3275 status = nfsd4_decode_compound(args);
3277 nfsd4_release_compoundargs(args);
3283 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3286 * All that remains is to write the tag and operation count...
3290 *p++ = htonl(resp->taglen);
3291 memcpy(p, resp->tag, resp->taglen);
3292 p += XDR_QUADLEN(resp->taglen);
3293 *p++ = htonl(resp->opcnt);
3295 if (rqstp->rq_res.page_len)
3296 iov = &rqstp->rq_res.tail[0];
3298 iov = &rqstp->rq_res.head[0];
3299 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3300 BUG_ON(iov->iov_len > PAGE_SIZE);
3301 if (nfsd4_has_session(&resp->cstate)) {
3302 if (resp->cstate.status == nfserr_replay_cache &&
3303 !nfsd4_not_cached(resp)) {
3304 iov->iov_len = resp->cstate.iovlen;
3306 nfsd4_store_cache_entry(resp);
3307 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3308 resp->cstate.slot->sl_inuse = 0;
3310 if (resp->cstate.session)
3311 nfsd4_put_session(resp->cstate.session);