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/namei.h>
44 #include <linux/statfs.h>
45 #include <linux/utsname.h>
46 #include <linux/nfsd_idmap.h>
47 #include <linux/nfs4_acl.h>
48 #include <linux/sunrpc/svcauth_gss.h>
53 #define NFSDDBG_FACILITY NFSDDBG_XDR
56 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
57 * directory in order to indicate to the client that a filesystem boundary is present
58 * We use a fixed fsid for a referral
60 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
61 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
64 check_filename(char *str, int len, __be32 err)
70 if (isdotent(str, len))
72 for (i = 0; i < len; i++)
86 dprintk("NFSD: xdr error (%s:%d)\n", \
87 __FILE__, __LINE__); \
88 status = nfserr_bad_xdr; \
91 #define READ32(x) (x) = ntohl(*p++)
92 #define READ64(x) do { \
93 (x) = (u64)ntohl(*p++) << 32; \
96 #define READTIME(x) do { \
101 #define READMEM(x,nbytes) do { \
103 p += XDR_QUADLEN(nbytes); \
105 #define SAVEMEM(x,nbytes) do { \
106 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
107 savemem(argp, p, nbytes) : \
109 dprintk("NFSD: xdr error (%s:%d)\n", \
110 __FILE__, __LINE__); \
113 p += XDR_QUADLEN(nbytes); \
115 #define COPYMEM(x,nbytes) do { \
116 memcpy((x), p, nbytes); \
117 p += XDR_QUADLEN(nbytes); \
120 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
121 #define READ_BUF(nbytes) do { \
122 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
124 argp->p += XDR_QUADLEN(nbytes); \
125 } else if (!(p = read_buf(argp, nbytes))) { \
126 dprintk("NFSD: xdr error (%s:%d)\n", \
127 __FILE__, __LINE__); \
132 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
134 /* We want more bytes than seem to be available.
135 * Maybe we need a new page, maybe we have just run out
137 unsigned int avail = (char *)argp->end - (char *)argp->p;
139 if (avail + argp->pagelen < nbytes)
141 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
143 /* ok, we can do it with the current plus the next page */
144 if (nbytes <= sizeof(argp->tmp))
148 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
154 * The following memcpy is safe because read_buf is always
155 * called with nbytes > avail, and the two cases above both
156 * guarantee p points to at least nbytes bytes.
158 memcpy(p, argp->p, avail);
159 /* step to next page */
160 argp->p = page_address(argp->pagelist[0]);
162 if (argp->pagelen < PAGE_SIZE) {
163 argp->end = p + (argp->pagelen>>2);
166 argp->end = p + (PAGE_SIZE>>2);
167 argp->pagelen -= PAGE_SIZE;
169 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
170 argp->p += XDR_QUADLEN(nbytes - avail);
174 static int zero_clientid(clientid_t *clid)
176 return (clid->cl_boot == 0) && (clid->cl_id == 0);
180 defer_free(struct nfsd4_compoundargs *argp,
181 void (*release)(const void *), void *p)
185 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
189 tb->release = release;
190 tb->next = argp->to_free;
195 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
197 if (p == argp->tmp) {
198 p = kmalloc(nbytes, GFP_KERNEL);
201 memcpy(p, argp->tmp, nbytes);
203 BUG_ON(p != argp->tmpp);
206 if (defer_free(argp, kfree, p)) {
214 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
228 READ_BUF(bmlen << 2);
240 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
241 struct iattr *iattr, struct nfs4_acl **acl)
243 int expected_len, len = 0;
250 if ((status = nfsd4_decode_bitmap(argp, bmval)))
254 READ32(expected_len);
256 if (bmval[0] & FATTR4_WORD0_SIZE) {
259 READ64(iattr->ia_size);
260 iattr->ia_valid |= ATTR_SIZE;
262 if (bmval[0] & FATTR4_WORD0_ACL) {
264 struct nfs4_ace *ace;
266 READ_BUF(4); len += 4;
269 if (nace > NFS4_ACL_MAX)
270 return nfserr_resource;
272 *acl = nfs4_acl_new(nace);
277 defer_free(argp, kfree, *acl);
279 (*acl)->naces = nace;
280 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
281 READ_BUF(16); len += 16;
284 READ32(ace->access_mask);
287 len += XDR_QUADLEN(dummy32) << 2;
288 READMEM(buf, dummy32);
289 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
291 if (ace->whotype != NFS4_ACL_WHO_NAMED)
293 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
294 host_err = nfsd_map_name_to_gid(argp->rqstp,
295 buf, dummy32, &ace->who);
297 host_err = nfsd_map_name_to_uid(argp->rqstp,
298 buf, dummy32, &ace->who);
304 if (bmval[1] & FATTR4_WORD1_MODE) {
307 READ32(iattr->ia_mode);
308 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
309 iattr->ia_valid |= ATTR_MODE;
311 if (bmval[1] & FATTR4_WORD1_OWNER) {
316 len += (XDR_QUADLEN(dummy32) << 2);
317 READMEM(buf, dummy32);
318 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
320 iattr->ia_valid |= ATTR_UID;
322 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
327 len += (XDR_QUADLEN(dummy32) << 2);
328 READMEM(buf, dummy32);
329 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
331 iattr->ia_valid |= ATTR_GID;
333 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
338 case NFS4_SET_TO_CLIENT_TIME:
339 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
340 all 32 bits of 'nseconds'. */
346 READ32(iattr->ia_atime.tv_sec);
347 READ32(iattr->ia_atime.tv_nsec);
348 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
350 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
352 case NFS4_SET_TO_SERVER_TIME:
353 iattr->ia_valid |= ATTR_ATIME;
359 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
372 READ32(iattr->ia_mtime.tv_sec);
373 READ32(iattr->ia_mtime.tv_nsec);
374 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
376 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
378 case NFS4_SET_TO_SERVER_TIME:
379 iattr->ia_valid |= ATTR_MTIME;
385 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
386 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
387 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
388 READ_BUF(expected_len - len);
389 else if (len != expected_len)
395 status = nfserrno(host_err);
400 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
404 READ_BUF(sizeof(stateid_t));
405 READ32(sid->si_generation);
406 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
412 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
417 READ32(access->ac_req_access);
423 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
427 close->cl_stateowner = NULL;
429 READ32(close->cl_seqid);
430 return nfsd4_decode_stateid(argp, &close->cl_stateid);
437 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
442 READ64(commit->co_offset);
443 READ32(commit->co_count);
449 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
454 READ32(create->cr_type);
455 switch (create->cr_type) {
458 READ32(create->cr_linklen);
459 READ_BUF(create->cr_linklen);
460 SAVEMEM(create->cr_linkname, create->cr_linklen);
465 READ32(create->cr_specdata1);
466 READ32(create->cr_specdata2);
476 READ32(create->cr_namelen);
477 READ_BUF(create->cr_namelen);
478 SAVEMEM(create->cr_name, create->cr_namelen);
479 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
482 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
491 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
493 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
497 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
499 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
503 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
508 READ32(link->li_namelen);
509 READ_BUF(link->li_namelen);
510 SAVEMEM(link->li_name, link->li_namelen);
511 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
518 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
522 lock->lk_replay_owner = NULL;
524 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
527 READ32(lock->lk_type);
528 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
530 READ32(lock->lk_reclaim);
531 READ64(lock->lk_offset);
532 READ64(lock->lk_length);
533 READ32(lock->lk_is_new);
535 if (lock->lk_is_new) {
537 READ32(lock->lk_new_open_seqid);
538 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
541 READ_BUF(8 + sizeof(clientid_t));
542 READ32(lock->lk_new_lock_seqid);
543 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
544 READ32(lock->lk_new_owner.len);
545 READ_BUF(lock->lk_new_owner.len);
546 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
548 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
552 READ32(lock->lk_old_lock_seqid);
559 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
564 READ32(lockt->lt_type);
565 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
567 READ64(lockt->lt_offset);
568 READ64(lockt->lt_length);
569 COPYMEM(&lockt->lt_clientid, 8);
570 READ32(lockt->lt_owner.len);
571 READ_BUF(lockt->lt_owner.len);
572 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
574 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
580 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
584 locku->lu_stateowner = NULL;
586 READ32(locku->lu_type);
587 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
589 READ32(locku->lu_seqid);
590 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
594 READ64(locku->lu_offset);
595 READ64(locku->lu_length);
601 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
606 READ32(lookup->lo_len);
607 READ_BUF(lookup->lo_len);
608 SAVEMEM(lookup->lo_name, lookup->lo_len);
609 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
616 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
620 memset(open->op_bmval, 0, sizeof(open->op_bmval));
621 open->op_iattr.ia_valid = 0;
622 open->op_stateowner = NULL;
624 /* seqid, share_access, share_deny, clientid, ownerlen */
625 READ_BUF(16 + sizeof(clientid_t));
626 READ32(open->op_seqid);
627 READ32(open->op_share_access);
628 READ32(open->op_share_deny);
629 COPYMEM(&open->op_clientid, sizeof(clientid_t));
630 READ32(open->op_owner.len);
632 /* owner, open_flag */
633 READ_BUF(open->op_owner.len + 4);
634 SAVEMEM(open->op_owner.data, open->op_owner.len);
635 READ32(open->op_create);
636 switch (open->op_create) {
637 case NFS4_OPEN_NOCREATE:
639 case NFS4_OPEN_CREATE:
641 READ32(open->op_createmode);
642 switch (open->op_createmode) {
643 case NFS4_CREATE_UNCHECKED:
644 case NFS4_CREATE_GUARDED:
645 status = nfsd4_decode_fattr(argp, open->op_bmval,
646 &open->op_iattr, &open->op_acl);
650 case NFS4_CREATE_EXCLUSIVE:
652 COPYMEM(open->op_verf.data, 8);
654 case NFS4_CREATE_EXCLUSIVE4_1:
655 if (argp->minorversion < 1)
658 COPYMEM(open->op_verf.data, 8);
659 status = nfsd4_decode_fattr(argp, open->op_bmval,
660 &open->op_iattr, &open->op_acl);
674 READ32(open->op_claim_type);
675 switch (open->op_claim_type) {
676 case NFS4_OPEN_CLAIM_NULL:
677 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
679 READ32(open->op_fname.len);
680 READ_BUF(open->op_fname.len);
681 SAVEMEM(open->op_fname.data, open->op_fname.len);
682 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
685 case NFS4_OPEN_CLAIM_PREVIOUS:
687 READ32(open->op_delegate_type);
689 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
690 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
694 READ32(open->op_fname.len);
695 READ_BUF(open->op_fname.len);
696 SAVEMEM(open->op_fname.data, open->op_fname.len);
697 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
708 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
712 open_conf->oc_stateowner = NULL;
713 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
717 READ32(open_conf->oc_seqid);
723 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
727 open_down->od_stateowner = NULL;
728 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
732 READ32(open_down->od_seqid);
733 READ32(open_down->od_share_access);
734 READ32(open_down->od_share_deny);
740 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
745 READ32(putfh->pf_fhlen);
746 if (putfh->pf_fhlen > NFS4_FHSIZE)
748 READ_BUF(putfh->pf_fhlen);
749 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
755 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
759 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
763 READ64(read->rd_offset);
764 READ32(read->rd_length);
770 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
775 READ64(readdir->rd_cookie);
776 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
777 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
778 READ32(readdir->rd_maxcount);
779 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
786 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
791 READ32(remove->rm_namelen);
792 READ_BUF(remove->rm_namelen);
793 SAVEMEM(remove->rm_name, remove->rm_namelen);
794 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
801 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
806 READ32(rename->rn_snamelen);
807 READ_BUF(rename->rn_snamelen + 4);
808 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
809 READ32(rename->rn_tnamelen);
810 READ_BUF(rename->rn_tnamelen);
811 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
812 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
814 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
821 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
825 READ_BUF(sizeof(clientid_t));
826 COPYMEM(clientid, sizeof(clientid_t));
832 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
833 struct nfsd4_secinfo *secinfo)
838 READ32(secinfo->si_namelen);
839 READ_BUF(secinfo->si_namelen);
840 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
841 status = check_filename(secinfo->si_name, secinfo->si_namelen,
849 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
853 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
856 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
861 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
866 COPYMEM(setclientid->se_verf.data, 8);
867 READ32(setclientid->se_namelen);
869 READ_BUF(setclientid->se_namelen + 8);
870 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
871 READ32(setclientid->se_callback_prog);
872 READ32(setclientid->se_callback_netid_len);
874 READ_BUF(setclientid->se_callback_netid_len + 4);
875 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
876 READ32(setclientid->se_callback_addr_len);
878 READ_BUF(setclientid->se_callback_addr_len + 4);
879 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
880 READ32(setclientid->se_callback_ident);
886 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
890 READ_BUF(8 + sizeof(nfs4_verifier));
891 COPYMEM(&scd_c->sc_clientid, 8);
892 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
897 /* Also used for NVERIFY */
899 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
902 struct nfsd4_compoundargs save = {
905 .rqstp = argp->rqstp,
908 struct iattr ve_iattr; /* request */
909 struct nfs4_acl *ve_acl; /* request */
913 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
916 /* For convenience's sake, we compare raw xdr'd attributes in
917 * nfsd4_proc_verify; however we still decode here just to return
918 * correct error in case of bad xdr. */
920 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
921 if (status == nfserr_inval) {
922 status = nfserrno(status);
927 READ32(verify->ve_attrlen);
928 READ_BUF(verify->ve_attrlen);
929 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
935 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
942 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
946 READ64(write->wr_offset);
947 READ32(write->wr_stable_how);
948 if (write->wr_stable_how > 2)
950 READ32(write->wr_buflen);
952 /* Sorry .. no magic macros for this.. *
953 * READ_BUF(write->wr_buflen);
954 * SAVEMEM(write->wr_buf, write->wr_buflen);
956 avail = (char*)argp->end - (char*)argp->p;
957 if (avail + argp->pagelen < write->wr_buflen) {
958 dprintk("NFSD: xdr error (%s:%d)\n",
962 argp->rqstp->rq_vec[0].iov_base = p;
963 argp->rqstp->rq_vec[0].iov_len = avail;
965 len = write->wr_buflen;
966 while (len > argp->rqstp->rq_vec[v].iov_len) {
967 len -= argp->rqstp->rq_vec[v].iov_len;
969 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
971 if (argp->pagelen >= PAGE_SIZE) {
972 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
973 argp->pagelen -= PAGE_SIZE;
975 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
976 argp->pagelen -= len;
979 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
980 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
981 argp->rqstp->rq_vec[v].iov_len = len;
982 write->wr_vlen = v+1;
988 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
993 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
994 READ32(rlockowner->rl_owner.len);
995 READ_BUF(rlockowner->rl_owner.len);
996 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
998 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1004 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1005 struct nfsd4_exchange_id *exid)
1010 READ_BUF(NFS4_VERIFIER_SIZE);
1011 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1014 READ32(exid->clname.len);
1016 READ_BUF(exid->clname.len);
1017 SAVEMEM(exid->clname.data, exid->clname.len);
1020 READ32(exid->flags);
1022 /* Ignore state_protect4_a */
1024 READ32(exid->spa_how);
1025 switch (exid->spa_how) {
1029 /* spo_must_enforce */
1032 READ_BUF(dummy * 4);
1035 /* spo_must_allow */
1038 READ_BUF(dummy * 4);
1045 READ_BUF(dummy * 4);
1050 READ_BUF(dummy * 4);
1053 /* ssp_hash_algs<> */
1057 p += XDR_QUADLEN(dummy);
1059 /* ssp_encr_algs<> */
1063 p += XDR_QUADLEN(dummy);
1065 /* ssp_window and ssp_num_gss_handles */
1074 /* Ignore Implementation ID */
1075 READ_BUF(4); /* nfs_impl_id4 array length */
1086 p += XDR_QUADLEN(dummy);
1092 p += XDR_QUADLEN(dummy);
1102 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1103 struct nfsd4_create_session *sess)
1113 COPYMEM(&sess->clientid, 8);
1114 READ32(sess->seqid);
1115 READ32(sess->flags);
1117 /* Fore channel attrs */
1119 READ32(dummy); /* headerpadsz is always 0 */
1120 READ32(sess->fore_channel.maxreq_sz);
1121 READ32(sess->fore_channel.maxresp_sz);
1122 READ32(sess->fore_channel.maxresp_cached);
1123 READ32(sess->fore_channel.maxops);
1124 READ32(sess->fore_channel.maxreqs);
1125 READ32(sess->fore_channel.nr_rdma_attrs);
1126 if (sess->fore_channel.nr_rdma_attrs == 1) {
1128 READ32(sess->fore_channel.rdma_attrs);
1129 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1130 dprintk("Too many fore channel attr bitmaps!\n");
1134 /* Back channel attrs */
1136 READ32(dummy); /* headerpadsz is always 0 */
1137 READ32(sess->back_channel.maxreq_sz);
1138 READ32(sess->back_channel.maxresp_sz);
1139 READ32(sess->back_channel.maxresp_cached);
1140 READ32(sess->back_channel.maxops);
1141 READ32(sess->back_channel.maxreqs);
1142 READ32(sess->back_channel.nr_rdma_attrs);
1143 if (sess->back_channel.nr_rdma_attrs == 1) {
1145 READ32(sess->back_channel.rdma_attrs);
1146 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1147 dprintk("Too many back channel attr bitmaps!\n");
1152 READ32(sess->callback_prog);
1154 /* callback_sec_params4 */
1155 READ32(nr_secflavs);
1156 for (i = 0; i < nr_secflavs; ++i) {
1161 /* Nothing to read */
1171 SAVEMEM(machine_name, dummy);
1181 READ_BUF(dummy * 4);
1182 for (i = 0; i < dummy; ++i)
1186 dprintk("RPC_AUTH_GSS callback secflavor "
1187 "not supported!\n");
1191 /* gcbp_handle_from_server */
1194 p += XDR_QUADLEN(dummy);
1195 /* gcbp_handle_from_client */
1199 p += XDR_QUADLEN(dummy);
1202 dprintk("Illegal callback secflavor\n");
1203 return nfserr_inval;
1210 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1211 struct nfsd4_destroy_session *destroy_session)
1214 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1215 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1221 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1222 struct nfsd4_sequence *seq)
1226 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1227 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1229 READ32(seq->slotid);
1230 READ32(seq->maxslots);
1231 READ32(seq->cachethis);
1237 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1243 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1245 return nfserr_notsupp;
1248 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1250 static nfsd4_dec nfsd4_dec_ops[] = {
1251 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1252 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1253 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1254 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1255 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1256 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1257 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1258 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1259 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1260 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1261 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1262 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1263 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1264 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1265 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1266 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1267 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1268 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1269 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1270 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1271 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1272 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1273 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1274 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1275 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1276 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1277 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1278 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1279 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1280 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1281 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1282 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1283 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1284 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1285 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1286 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1287 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1290 static nfsd4_dec nfsd41_dec_ops[] = {
1291 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1292 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1293 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1294 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1295 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1296 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1297 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1298 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1299 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1300 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1301 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1302 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1303 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1304 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1305 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1306 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1307 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1308 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1309 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1310 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1311 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1312 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1313 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1314 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1315 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1316 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1317 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1318 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1319 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1320 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1321 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1322 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1323 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1324 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1325 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1326 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1327 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1329 /* new operations for NFSv4.1 */
1330 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1331 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1332 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1333 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1334 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1335 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1337 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1341 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1344 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1345 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_notsupp,
1351 struct nfsd4_minorversion_ops {
1352 nfsd4_dec *decoders;
1356 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1357 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1358 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1362 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1365 struct nfsd4_op *op;
1366 struct nfsd4_minorversion_ops *ops;
1370 * XXX: According to spec, we should check the tag
1371 * for UTF-8 compliance. I'm postponing this for
1372 * now because it seems that some clients do use
1376 READ32(argp->taglen);
1377 READ_BUF(argp->taglen + 8);
1378 SAVEMEM(argp->tag, argp->taglen);
1379 READ32(argp->minorversion);
1380 READ32(argp->opcnt);
1382 if (argp->taglen > NFSD4_MAX_TAGLEN)
1384 if (argp->opcnt > 100)
1387 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1388 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1390 argp->ops = argp->iops;
1391 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1396 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1399 ops = &nfsd4_minorversion[argp->minorversion];
1400 for (i = 0; i < argp->opcnt; i++) {
1405 * We can't use READ_BUF() here because we need to handle
1406 * a missing opcode as an OP_WRITE + 1. So we need to check
1407 * to see if we're truly at the end of our buffer or if there
1408 * is another page we need to flip to.
1411 if (argp->p == argp->end) {
1412 if (argp->pagelen < 4) {
1413 /* There isn't an opcode still on the wire */
1414 op->opnum = OP_WRITE + 1;
1415 op->status = nfserr_bad_xdr;
1421 * False alarm. We just hit a page boundary, but there
1422 * is still data available. Move pointer across page
1423 * boundary. *snip from READ_BUF*
1425 argp->p = page_address(argp->pagelist[0]);
1427 if (argp->pagelen < PAGE_SIZE) {
1428 argp->end = p + (argp->pagelen>>2);
1431 argp->end = p + (PAGE_SIZE>>2);
1432 argp->pagelen -= PAGE_SIZE;
1435 op->opnum = ntohl(*argp->p++);
1437 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1438 op->status = ops->decoders[op->opnum](argp, &op->u);
1440 op->opnum = OP_ILLEGAL;
1441 op->status = nfserr_op_illegal;
1453 #define WRITE32(n) *p++ = htonl(n)
1454 #define WRITE64(n) do { \
1455 *p++ = htonl((u32)((n) >> 32)); \
1456 *p++ = htonl((u32)(n)); \
1458 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1459 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1460 memcpy(p, ptr, nbytes); \
1461 p += XDR_QUADLEN(nbytes); \
1464 static void write32(__be32 **p, u32 n)
1469 static void write64(__be32 **p, u64 n)
1471 write32(p, (u32)(n >> 32));
1475 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1477 if (IS_I_VERSION(inode)) {
1478 write64(p, inode->i_version);
1480 write32(p, stat->ctime.tv_sec);
1481 write32(p, stat->ctime.tv_nsec);
1485 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1487 write32(p, c->atomic);
1488 if (c->change_supported) {
1489 write64(p, c->before_change);
1490 write64(p, c->after_change);
1492 write32(p, c->before_ctime_sec);
1493 write32(p, c->before_ctime_nsec);
1494 write32(p, c->after_ctime_sec);
1495 write32(p, c->after_ctime_nsec);
1499 #define RESERVE_SPACE(nbytes) do { \
1501 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1503 #define ADJUST_ARGS() resp->p = p
1506 * Header routine to setup seqid operation replay cache
1508 #define ENCODE_SEQID_OP_HEAD \
1514 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1515 * is where sequence id's are incremented, and the replay cache is filled.
1516 * Note that we increment sequence id's here, at the last moment, so we're sure
1517 * we know whether the error to be returned is a sequence id mutating error.
1520 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1521 if (seqid_mutating_err(nfserr) && stateowner) { \
1522 stateowner->so_seqid++; \
1523 stateowner->so_replay.rp_status = nfserr; \
1524 stateowner->so_replay.rp_buflen = \
1525 (((char *)(resp)->p - (char *)save)); \
1526 memcpy(stateowner->so_replay.rp_buf, save, \
1527 stateowner->so_replay.rp_buflen); \
1530 /* Encode as an array of strings the string given with components
1533 static __be32 nfsd4_encode_components(char sep, char *components,
1534 __be32 **pp, int *buflen)
1538 int strlen, count=0;
1541 dprintk("nfsd4_encode_components(%s)\n", components);
1542 if ((*buflen -= 4) < 0)
1543 return nfserr_resource;
1544 WRITE32(0); /* We will fill this in with @count later */
1545 end = str = components;
1547 for (; *end && (*end != sep); end++)
1548 ; /* Point to end of component */
1551 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1552 return nfserr_resource;
1554 WRITEMEM(str, strlen);
1568 * encode a location element of a fs_locations structure
1570 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1571 __be32 **pp, int *buflen)
1576 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1579 status = nfsd4_encode_components('/', location->path, &p, buflen);
1587 * Return the path to an export point in the pseudo filesystem namespace
1588 * Returned string is safe to use as long as the caller holds a reference
1591 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1593 struct svc_fh tmp_fh;
1594 char *path = NULL, *rootpath;
1597 fh_init(&tmp_fh, NFS4_FHSIZE);
1598 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1601 rootpath = tmp_fh.fh_export->ex_pathname;
1603 path = exp->ex_pathname;
1605 rootlen = strlen(rootpath);
1606 if (strncmp(path, rootpath, rootlen)) {
1607 dprintk("nfsd: fs_locations failed;"
1608 "%s is not contained in %s\n", path, rootpath);
1609 *stat = nfserr_notsupp;
1620 * encode a fs_locations structure
1622 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1623 struct svc_export *exp,
1624 __be32 **pp, int *buflen)
1629 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1630 char *root = nfsd4_path(rqstp, exp, &status);
1634 status = nfsd4_encode_components('/', root, &p, buflen);
1637 if ((*buflen -= 4) < 0)
1638 return nfserr_resource;
1639 WRITE32(fslocs->locations_count);
1640 for (i=0; i<fslocs->locations_count; i++) {
1641 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1650 static u32 nfs4_ftypes[16] = {
1651 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1652 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1653 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1654 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1658 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1659 __be32 **p, int *buflen)
1663 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1664 return nfserr_resource;
1665 if (whotype != NFS4_ACL_WHO_NAMED)
1666 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1668 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1670 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1672 return nfserrno(status);
1673 *p = xdr_encode_opaque(*p, NULL, status);
1674 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1675 BUG_ON(*buflen < 0);
1679 static inline __be32
1680 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1682 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1685 static inline __be32
1686 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1688 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1691 static inline __be32
1692 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1693 __be32 **p, int *buflen)
1695 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1698 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1699 FATTR4_WORD0_RDATTR_ERROR)
1700 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1702 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1704 /* As per referral draft: */
1705 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1706 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1707 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1708 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1709 *rdattr_err = NFSERR_MOVED;
1711 return nfserr_moved;
1713 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1714 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1719 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1722 * @countp is the buffer size in _words_; upon successful return this becomes
1723 * replaced with the number of words written.
1726 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1727 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1728 struct svc_rqst *rqstp, int ignore_crossmnt)
1730 u32 bmval0 = bmval[0];
1731 u32 bmval1 = bmval[1];
1732 u32 bmval2 = bmval[2];
1734 struct svc_fh tempfh;
1735 struct kstatfs statfs;
1736 int buflen = *countp << 2;
1745 struct nfs4_acl *acl = NULL;
1746 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1747 u32 minorversion = resp->cstate.minorversion;
1749 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1750 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1751 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1752 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1754 if (exp->ex_fslocs.migrated) {
1756 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1761 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1764 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1765 FATTR4_WORD0_MAXNAME)) ||
1766 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1767 FATTR4_WORD1_SPACE_TOTAL))) {
1768 err = vfs_statfs(dentry, &statfs);
1772 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1773 fh_init(&tempfh, NFS4_FHSIZE);
1774 status = fh_compose(&tempfh, exp, dentry, NULL);
1779 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1780 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1781 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1782 aclsupport = (err == 0);
1783 if (bmval0 & FATTR4_WORD0_ACL) {
1784 if (err == -EOPNOTSUPP)
1785 bmval0 &= ~FATTR4_WORD0_ACL;
1786 else if (err == -EINVAL) {
1787 status = nfserr_attrnotsupp;
1789 } else if (err != 0)
1793 if ((buflen -= 16) < 0)
1796 if (unlikely(bmval2)) {
1801 } else if (likely(bmval1)) {
1809 attrlenp = p++; /* to be backfilled later */
1811 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1812 u32 word0 = nfsd_suppattrs0(minorversion);
1813 u32 word1 = nfsd_suppattrs1(minorversion);
1814 u32 word2 = nfsd_suppattrs2(minorversion);
1816 if ((buflen -= 12) < 0)
1819 word0 &= ~FATTR4_WORD0_ACL;
1831 if (bmval0 & FATTR4_WORD0_TYPE) {
1832 if ((buflen -= 4) < 0)
1834 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1835 if (dummy == NF4BAD)
1836 goto out_serverfault;
1839 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1840 if ((buflen -= 4) < 0)
1842 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1843 WRITE32(NFS4_FH_PERSISTENT);
1845 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1847 if (bmval0 & FATTR4_WORD0_CHANGE) {
1848 if ((buflen -= 8) < 0)
1850 write_change(&p, &stat, dentry->d_inode);
1852 if (bmval0 & FATTR4_WORD0_SIZE) {
1853 if ((buflen -= 8) < 0)
1857 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1858 if ((buflen -= 4) < 0)
1862 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1863 if ((buflen -= 4) < 0)
1867 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1868 if ((buflen -= 4) < 0)
1872 if (bmval0 & FATTR4_WORD0_FSID) {
1873 if ((buflen -= 16) < 0)
1875 if (exp->ex_fslocs.migrated) {
1876 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1877 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1878 } else switch(fsid_source(fhp)) {
1879 case FSIDSOURCE_FSID:
1880 WRITE64((u64)exp->ex_fsid);
1883 case FSIDSOURCE_DEV:
1885 WRITE32(MAJOR(stat.dev));
1887 WRITE32(MINOR(stat.dev));
1889 case FSIDSOURCE_UUID:
1890 WRITEMEM(exp->ex_uuid, 16);
1894 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1895 if ((buflen -= 4) < 0)
1899 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1900 if ((buflen -= 4) < 0)
1902 WRITE32(NFSD_LEASE_TIME);
1904 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1905 if ((buflen -= 4) < 0)
1907 WRITE32(rdattr_err);
1909 if (bmval0 & FATTR4_WORD0_ACL) {
1910 struct nfs4_ace *ace;
1913 if ((buflen -= 4) < 0)
1919 if ((buflen -= 4) < 0)
1921 WRITE32(acl->naces);
1923 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1924 if ((buflen -= 4*3) < 0)
1928 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1929 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1930 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1932 if (status == nfserr_resource)
1939 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1940 if ((buflen -= 4) < 0)
1942 WRITE32(aclsupport ?
1943 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1945 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1946 if ((buflen -= 4) < 0)
1950 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1951 if ((buflen -= 4) < 0)
1955 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1956 if ((buflen -= 4) < 0)
1960 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1961 if ((buflen -= 4) < 0)
1965 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1966 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1969 WRITE32(fhp->fh_handle.fh_size);
1970 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1972 if (bmval0 & FATTR4_WORD0_FILEID) {
1973 if ((buflen -= 8) < 0)
1977 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1978 if ((buflen -= 8) < 0)
1980 WRITE64((u64) statfs.f_ffree);
1982 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1983 if ((buflen -= 8) < 0)
1985 WRITE64((u64) statfs.f_ffree);
1987 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1988 if ((buflen -= 8) < 0)
1990 WRITE64((u64) statfs.f_files);
1992 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1993 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1994 if (status == nfserr_resource)
1999 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2000 if ((buflen -= 4) < 0)
2004 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2005 if ((buflen -= 8) < 0)
2009 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2010 if ((buflen -= 4) < 0)
2014 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2015 if ((buflen -= 4) < 0)
2017 WRITE32(statfs.f_namelen);
2019 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2020 if ((buflen -= 8) < 0)
2022 WRITE64((u64) svc_max_payload(rqstp));
2024 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2025 if ((buflen -= 8) < 0)
2027 WRITE64((u64) svc_max_payload(rqstp));
2029 if (bmval1 & FATTR4_WORD1_MODE) {
2030 if ((buflen -= 4) < 0)
2032 WRITE32(stat.mode & S_IALLUGO);
2034 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2035 if ((buflen -= 4) < 0)
2039 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2040 if ((buflen -= 4) < 0)
2042 WRITE32(stat.nlink);
2044 if (bmval1 & FATTR4_WORD1_OWNER) {
2045 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2046 if (status == nfserr_resource)
2051 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2052 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2053 if (status == nfserr_resource)
2058 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2059 if ((buflen -= 8) < 0)
2061 WRITE32((u32) MAJOR(stat.rdev));
2062 WRITE32((u32) MINOR(stat.rdev));
2064 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2065 if ((buflen -= 8) < 0)
2067 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2070 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2071 if ((buflen -= 8) < 0)
2073 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2076 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2077 if ((buflen -= 8) < 0)
2079 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2082 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2083 if ((buflen -= 8) < 0)
2085 dummy64 = (u64)stat.blocks << 9;
2088 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2089 if ((buflen -= 12) < 0)
2092 WRITE32(stat.atime.tv_sec);
2093 WRITE32(stat.atime.tv_nsec);
2095 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2096 if ((buflen -= 12) < 0)
2102 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2103 if ((buflen -= 12) < 0)
2106 WRITE32(stat.ctime.tv_sec);
2107 WRITE32(stat.ctime.tv_nsec);
2109 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2110 if ((buflen -= 12) < 0)
2113 WRITE32(stat.mtime.tv_sec);
2114 WRITE32(stat.mtime.tv_nsec);
2116 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2117 if ((buflen -= 8) < 0)
2120 * Get parent's attributes if not ignoring crossmount
2121 * and this is the root of a cross-mounted filesystem.
2123 if (ignore_crossmnt == 0 &&
2124 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2125 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2126 exp->ex_path.mnt->mnt_mountpoint, &stat);
2132 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2134 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2135 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2136 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2139 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2140 *countp = p - buffer;
2149 status = nfserrno(err);
2153 status = nfserr_resource;
2156 status = nfserr_serverfault;
2160 static inline int attributes_need_mount(u32 *bmval)
2162 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2164 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2170 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2171 const char *name, int namlen, __be32 *p, int *buflen)
2173 struct svc_export *exp = cd->rd_fhp->fh_export;
2174 struct dentry *dentry;
2176 int ignore_crossmnt = 0;
2178 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2180 return nfserrno(PTR_ERR(dentry));
2181 if (!dentry->d_inode) {
2183 * nfsd_buffered_readdir drops the i_mutex between
2184 * readdir and calling this callback, leaving a window
2185 * where this directory entry could have gone away.
2188 return nfserr_noent;
2193 * In the case of a mountpoint, the client may be asking for
2194 * attributes that are only properties of the underlying filesystem
2195 * as opposed to the cross-mounted file system. In such a case,
2196 * we will not follow the cross mount and will fill the attribtutes
2197 * directly from the mountpoint dentry.
2199 if (nfsd_mountpoint(dentry, exp)) {
2202 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2203 && !attributes_need_mount(cd->rd_bmval)) {
2204 ignore_crossmnt = 1;
2208 * Why the heck aren't we just using nfsd_lookup??
2209 * Different "."/".." handling? Something else?
2210 * At least, add a comment here to explain....
2212 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2214 nfserr = nfserrno(err);
2217 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2223 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2224 cd->rd_rqstp, ignore_crossmnt);
2232 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2239 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2240 *p++ = htonl(0); /* bmval1 */
2243 *p++ = nfserr; /* no htonl */
2244 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2249 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2250 loff_t offset, u64 ino, unsigned int d_type)
2252 struct readdir_cd *ccd = ccdv;
2253 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2255 __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 */
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;
2291 * If the client requested the RDATTR_ERROR attribute,
2292 * we stuff the error code into this attribute
2293 * and continue. If this attribute was not requested,
2294 * then in accordance with the spec, we fail the
2295 * entire READDIR operation(!)
2297 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2299 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2301 nfserr = nfserr_toosmall;
2305 cd->buflen -= (p - cd->buffer);
2307 cd->offset = cookiep;
2309 cd->common.err = nfs_ok;
2312 cd->common.err = nfserr;
2317 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2321 RESERVE_SPACE(sizeof(stateid_t));
2322 WRITE32(sid->si_generation);
2323 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2328 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2334 WRITE32(access->ac_supported);
2335 WRITE32(access->ac_resp_access);
2342 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2344 ENCODE_SEQID_OP_HEAD;
2347 nfsd4_encode_stateid(resp, &close->cl_stateid);
2349 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2355 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2361 WRITEMEM(commit->co_verf.data, 8);
2368 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2374 write_cinfo(&p, &create->cr_cinfo);
2376 WRITE32(create->cr_bmval[0]);
2377 WRITE32(create->cr_bmval[1]);
2384 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2386 struct svc_fh *fhp = getattr->ga_fhp;
2392 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2393 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2394 resp->p, &buflen, getattr->ga_bmval,
2402 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2404 struct svc_fh *fhp = *fhpp;
2409 len = fhp->fh_handle.fh_size;
2410 RESERVE_SPACE(len + 4);
2412 WRITEMEM(&fhp->fh_handle.fh_base, len);
2419 * Including all fields other than the name, a LOCK4denied structure requires
2420 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2423 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2427 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2428 WRITE64(ld->ld_start);
2429 WRITE64(ld->ld_length);
2430 WRITE32(ld->ld_type);
2432 WRITEMEM(&ld->ld_clientid, 8);
2433 WRITE32(ld->ld_sop->so_owner.len);
2434 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2435 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2436 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2437 WRITE64((u64)0); /* clientid */
2438 WRITE32(0); /* length of owner name */
2444 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2446 ENCODE_SEQID_OP_HEAD;
2449 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2450 else if (nfserr == nfserr_denied)
2451 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2453 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2458 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2460 if (nfserr == nfserr_denied)
2461 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2466 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2468 ENCODE_SEQID_OP_HEAD;
2471 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2473 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2479 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2485 write_cinfo(&p, &link->li_cinfo);
2493 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2496 ENCODE_SEQID_OP_HEAD;
2501 nfsd4_encode_stateid(resp, &open->op_stateid);
2503 write_cinfo(&p, &open->op_cinfo);
2504 WRITE32(open->op_rflags);
2506 WRITE32(open->op_bmval[0]);
2507 WRITE32(open->op_bmval[1]);
2508 WRITE32(open->op_delegate_type);
2511 switch (open->op_delegate_type) {
2512 case NFS4_OPEN_DELEGATE_NONE:
2514 case NFS4_OPEN_DELEGATE_READ:
2515 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2517 WRITE32(open->op_recall);
2520 * TODO: ACE's in delegations
2522 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2525 WRITE32(0); /* XXX: is NULL principal ok? */
2528 case NFS4_OPEN_DELEGATE_WRITE:
2529 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2534 * TODO: space_limit's in delegations
2536 WRITE32(NFS4_LIMIT_SIZE);
2541 * TODO: ACE's in delegations
2543 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2546 WRITE32(0); /* XXX: is NULL principal ok? */
2552 /* XXX save filehandle here */
2554 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2559 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2561 ENCODE_SEQID_OP_HEAD;
2564 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2566 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2571 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2573 ENCODE_SEQID_OP_HEAD;
2576 nfsd4_encode_stateid(resp, &od->od_stateid);
2578 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2583 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2584 struct nfsd4_read *read)
2588 unsigned long maxcount;
2594 if (resp->xbuf->page_len)
2595 return nfserr_resource;
2597 RESERVE_SPACE(8); /* eof flag and byte count */
2599 maxcount = svc_max_payload(resp->rqstp);
2600 if (maxcount > read->rd_length)
2601 maxcount = read->rd_length;
2606 pn = resp->rqstp->rq_resused++;
2607 resp->rqstp->rq_vec[v].iov_base =
2608 page_address(resp->rqstp->rq_respages[pn]);
2609 resp->rqstp->rq_vec[v].iov_len =
2610 len < PAGE_SIZE ? len : PAGE_SIZE;
2616 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2617 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2620 if (nfserr == nfserr_symlink)
2621 nfserr = nfserr_inval;
2624 eof = (read->rd_offset + maxcount >=
2625 read->rd_fhp->fh_dentry->d_inode->i_size);
2630 resp->xbuf->head[0].iov_len = (char*)p
2631 - (char*)resp->xbuf->head[0].iov_base;
2632 resp->xbuf->page_len = maxcount;
2634 /* Use rest of head for padding and remaining ops: */
2635 resp->xbuf->tail[0].iov_base = p;
2636 resp->xbuf->tail[0].iov_len = 0;
2640 resp->xbuf->tail[0].iov_base += maxcount&3;
2641 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2648 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2656 if (resp->xbuf->page_len)
2657 return nfserr_resource;
2659 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2661 maxcount = PAGE_SIZE;
2665 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2666 * if they would overflow the buffer. Is this kosher in NFSv4? If
2667 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2668 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2670 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2671 if (nfserr == nfserr_isdir)
2672 return nfserr_inval;
2678 resp->xbuf->head[0].iov_len = (char*)p
2679 - (char*)resp->xbuf->head[0].iov_base;
2680 resp->xbuf->page_len = maxcount;
2682 /* Use rest of head for padding and remaining ops: */
2683 resp->xbuf->tail[0].iov_base = p;
2684 resp->xbuf->tail[0].iov_len = 0;
2688 resp->xbuf->tail[0].iov_base += maxcount&3;
2689 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2696 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2700 __be32 *page, *savep, *tailbase;
2705 if (resp->xbuf->page_len)
2706 return nfserr_resource;
2708 RESERVE_SPACE(8); /* verifier */
2711 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2715 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2718 maxcount = PAGE_SIZE;
2719 if (maxcount > readdir->rd_maxcount)
2720 maxcount = readdir->rd_maxcount;
2723 * Convert from bytes to words, account for the two words already
2724 * written, make sure to leave two words at the end for the next
2725 * pointer and eof field.
2727 maxcount = (maxcount >> 2) - 4;
2729 nfserr = nfserr_toosmall;
2733 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2734 readdir->common.err = 0;
2735 readdir->buflen = maxcount;
2736 readdir->buffer = page;
2737 readdir->offset = NULL;
2739 offset = readdir->rd_cookie;
2740 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2742 &readdir->common, nfsd4_encode_dirent);
2743 if (nfserr == nfs_ok &&
2744 readdir->common.err == nfserr_toosmall &&
2745 readdir->buffer == page)
2746 nfserr = nfserr_toosmall;
2747 if (nfserr == nfserr_symlink)
2748 nfserr = nfserr_notdir;
2752 if (readdir->offset)
2753 xdr_encode_hyper(readdir->offset, offset);
2755 p = readdir->buffer;
2756 *p++ = 0; /* no more entries */
2757 *p++ = htonl(readdir->common.err == nfserr_eof);
2758 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2759 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2761 /* Use rest of head for padding and remaining ops: */
2762 resp->xbuf->tail[0].iov_base = tailbase;
2763 resp->xbuf->tail[0].iov_len = 0;
2764 resp->p = resp->xbuf->tail[0].iov_base;
2765 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2775 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2781 write_cinfo(&p, &remove->rm_cinfo);
2788 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2794 write_cinfo(&p, &rename->rn_sinfo);
2795 write_cinfo(&p, &rename->rn_tinfo);
2802 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2803 struct nfsd4_secinfo *secinfo)
2806 struct svc_export *exp = secinfo->si_exp;
2808 struct exp_flavor_info *flavs;
2809 struct exp_flavor_info def_flavs[2];
2814 if (exp->ex_nflavors) {
2815 flavs = exp->ex_flavors;
2816 nflavs = exp->ex_nflavors;
2817 } else { /* Handling of some defaults in absence of real secinfo: */
2819 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2821 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2822 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2823 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2825 flavs[0].pseudoflavor
2826 = svcauth_gss_flavor(exp->ex_client);
2829 flavs[0].pseudoflavor
2830 = exp->ex_client->flavour->flavour;
2837 for (i = 0; i < nflavs; i++) {
2838 u32 flav = flavs[i].pseudoflavor;
2839 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2843 WRITE32(RPC_AUTH_GSS);
2845 RESERVE_SPACE(4 + gm->gm_oid.len);
2846 WRITE32(gm->gm_oid.len);
2847 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2850 WRITE32(0); /* qop */
2853 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2869 * The SETATTR encode routine is special -- it always encodes a bitmap,
2870 * regardless of the error status.
2873 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2885 WRITE32(setattr->sa_bmval[0]);
2886 WRITE32(setattr->sa_bmval[1]);
2893 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2898 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2899 WRITEMEM(&scd->se_clientid, 8);
2900 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2903 else if (nfserr == nfserr_clid_inuse) {
2913 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2919 WRITE32(write->wr_bytes_written);
2920 WRITE32(write->wr_how_written);
2921 WRITEMEM(write->wr_verifier.data, 8);
2928 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2929 struct nfsd4_exchange_id *exid)
2935 int server_scope_sz;
2936 uint64_t minor_id = 0;
2941 major_id = utsname()->nodename;
2942 major_id_sz = strlen(major_id);
2943 server_scope = utsname()->nodename;
2944 server_scope_sz = strlen(server_scope);
2947 8 /* eir_clientid */ +
2948 4 /* eir_sequenceid */ +
2950 4 /* spr_how (SP4_NONE) */ +
2951 8 /* so_minor_id */ +
2952 4 /* so_major_id.len */ +
2953 (XDR_QUADLEN(major_id_sz) * 4) +
2954 4 /* eir_server_scope.len */ +
2955 (XDR_QUADLEN(server_scope_sz) * 4) +
2956 4 /* eir_server_impl_id.count (0) */);
2958 WRITEMEM(&exid->clientid, 8);
2959 WRITE32(exid->seqid);
2960 WRITE32(exid->flags);
2962 /* state_protect4_r. Currently only support SP4_NONE */
2963 BUG_ON(exid->spa_how != SP4_NONE);
2964 WRITE32(exid->spa_how);
2966 /* The server_owner struct */
2967 WRITE64(minor_id); /* Minor id */
2969 WRITE32(major_id_sz);
2970 WRITEMEM(major_id, major_id_sz);
2973 WRITE32(server_scope_sz);
2974 WRITEMEM(server_scope, server_scope_sz);
2976 /* Implementation id */
2977 WRITE32(0); /* zero length nfs_impl_id4 array */
2983 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2984 struct nfsd4_create_session *sess)
2992 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2993 WRITE32(sess->seqid);
2994 WRITE32(sess->flags);
2998 WRITE32(0); /* headerpadsz */
2999 WRITE32(sess->fore_channel.maxreq_sz);
3000 WRITE32(sess->fore_channel.maxresp_sz);
3001 WRITE32(sess->fore_channel.maxresp_cached);
3002 WRITE32(sess->fore_channel.maxops);
3003 WRITE32(sess->fore_channel.maxreqs);
3004 WRITE32(sess->fore_channel.nr_rdma_attrs);
3007 if (sess->fore_channel.nr_rdma_attrs) {
3009 WRITE32(sess->fore_channel.rdma_attrs);
3014 WRITE32(0); /* headerpadsz */
3015 WRITE32(sess->back_channel.maxreq_sz);
3016 WRITE32(sess->back_channel.maxresp_sz);
3017 WRITE32(sess->back_channel.maxresp_cached);
3018 WRITE32(sess->back_channel.maxops);
3019 WRITE32(sess->back_channel.maxreqs);
3020 WRITE32(sess->back_channel.nr_rdma_attrs);
3023 if (sess->back_channel.nr_rdma_attrs) {
3025 WRITE32(sess->back_channel.rdma_attrs);
3032 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3033 struct nfsd4_destroy_session *destroy_session)
3039 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3040 struct nfsd4_sequence *seq)
3047 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3048 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3049 WRITE32(seq->seqid);
3050 WRITE32(seq->slotid);
3051 WRITE32(seq->maxslots);
3054 * target_maxslots = maxslots
3057 WRITE32(seq->maxslots);
3061 resp->cstate.datap = p; /* DRC cache data pointer */
3066 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3071 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3074 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3075 * since we don't need to filter out obsolete ops as this is
3076 * done in the decoding phase.
3078 static nfsd4_enc nfsd4_enc_ops[] = {
3079 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3080 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3081 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3082 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3083 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3084 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3085 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3086 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3087 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3088 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3089 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3090 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3091 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3092 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3093 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3094 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3095 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3096 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3097 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3098 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3099 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3100 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3101 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3102 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3103 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3104 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3105 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3106 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3107 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3108 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3109 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3110 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3111 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3112 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3113 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3114 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3115 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3117 /* NFSv4.1 operations */
3118 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3119 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3120 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3121 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3122 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3123 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3124 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3125 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3126 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3127 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3128 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3129 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3130 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3132 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3133 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3134 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3135 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3136 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3140 * Calculate the total amount of memory that the compound response has taken
3141 * after encoding the current operation.
3143 * pad: add on 8 bytes for the next operation's op_code and status so that
3144 * there is room to cache a failure on the next operation.
3146 * Compare this length to the session se_fmaxresp_cached.
3148 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3149 * will be at least a page and will therefore hold the xdr_buf head.
3151 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3154 struct xdr_buf *xb = &resp->rqstp->rq_res;
3155 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3156 struct nfsd4_session *session = NULL;
3157 struct nfsd4_slot *slot = resp->cstate.slot;
3158 u32 length, tlen = 0, pad = 8;
3160 if (!nfsd4_has_session(&resp->cstate))
3163 session = resp->cstate.session;
3164 if (session == NULL || slot->sl_cachethis == 0)
3167 if (resp->opcnt >= args->opcnt)
3168 pad = 0; /* this is the last operation */
3170 if (xb->page_len == 0) {
3171 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3173 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3174 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3176 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3178 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3179 length, xb->page_len, tlen, pad);
3181 if (length <= session->se_fchannel.maxresp_cached)
3184 return nfserr_rep_too_big_to_cache;
3188 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3195 statp = p++; /* to be backfilled at the end */
3198 if (op->opnum == OP_ILLEGAL)
3200 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3201 !nfsd4_enc_ops[op->opnum]);
3202 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3203 /* nfsd4_check_drc_limit guarantees enough room for error status */
3204 if (!op->status && nfsd4_check_drc_limit(resp))
3205 op->status = nfserr_rep_too_big_to_cache;
3208 * Note: We write the status directly, instead of using WRITE32(),
3209 * since it is already in network byte order.
3211 *statp = op->status;
3215 * Encode the reply stored in the stateowner reply cache
3217 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3218 * previously sent already encoded operation.
3220 * called with nfs4_lock_state() held
3223 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3226 struct nfs4_replay *rp = op->replay;
3232 *p++ = rp->rp_status; /* already xdr'ed */
3235 RESERVE_SPACE(rp->rp_buflen);
3236 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3241 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3243 return xdr_ressize_check(rqstp, p);
3246 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3248 if (args->ops != args->iops) {
3250 args->ops = args->iops;
3254 while (args->to_free) {
3255 struct tmpbuf *tb = args->to_free;
3256 args->to_free = tb->next;
3257 tb->release(tb->buf);
3263 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3268 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3269 args->pagelist = rqstp->rq_arg.pages;
3270 args->pagelen = rqstp->rq_arg.page_len;
3272 args->to_free = NULL;
3273 args->ops = args->iops;
3274 args->rqstp = rqstp;
3276 status = nfsd4_decode_compound(args);
3278 nfsd4_release_compoundargs(args);
3284 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3287 * All that remains is to write the tag and operation count...
3289 struct nfsd4_compound_state *cs = &resp->cstate;
3292 *p++ = htonl(resp->taglen);
3293 memcpy(p, resp->tag, resp->taglen);
3294 p += XDR_QUADLEN(resp->taglen);
3295 *p++ = htonl(resp->opcnt);
3297 if (rqstp->rq_res.page_len)
3298 iov = &rqstp->rq_res.tail[0];
3300 iov = &rqstp->rq_res.head[0];
3301 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3302 BUG_ON(iov->iov_len > PAGE_SIZE);
3303 if (nfsd4_has_session(cs) && cs->status != nfserr_replay_cache) {
3304 nfsd4_store_cache_entry(resp);
3305 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3306 resp->cstate.slot->sl_inuse = false;
3307 nfsd4_put_session(resp->cstate.session);