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);
193 defer_free(struct nfsd4_compoundargs *argp,
194 void (*release)(const void *), void *p)
198 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
202 tb->release = release;
203 tb->next = argp->to_free;
208 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
210 if (p == argp->tmp) {
211 p = kmalloc(nbytes, GFP_KERNEL);
214 memcpy(p, argp->tmp, nbytes);
216 BUG_ON(p != argp->tmpp);
219 if (defer_free(argp, kfree, p)) {
227 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
240 READ_BUF(bmlen << 2);
250 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
251 struct nfs4_acl **acl)
253 int expected_len, len = 0;
260 if ((status = nfsd4_decode_bitmap(argp, bmval)))
264 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
265 * read-only attributes return ERR_INVAL.
267 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
268 return nfserr_attrnotsupp;
269 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
273 READ32(expected_len);
275 if (bmval[0] & FATTR4_WORD0_SIZE) {
278 READ64(iattr->ia_size);
279 iattr->ia_valid |= ATTR_SIZE;
281 if (bmval[0] & FATTR4_WORD0_ACL) {
283 struct nfs4_ace *ace;
285 READ_BUF(4); len += 4;
288 if (nace > NFS4_ACL_MAX)
289 return nfserr_resource;
291 *acl = nfs4_acl_new(nace);
296 defer_free(argp, kfree, *acl);
298 (*acl)->naces = nace;
299 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
300 READ_BUF(16); len += 16;
303 READ32(ace->access_mask);
306 len += XDR_QUADLEN(dummy32) << 2;
307 READMEM(buf, dummy32);
308 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
310 if (ace->whotype != NFS4_ACL_WHO_NAMED)
312 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
313 host_err = nfsd_map_name_to_gid(argp->rqstp,
314 buf, dummy32, &ace->who);
316 host_err = nfsd_map_name_to_uid(argp->rqstp,
317 buf, dummy32, &ace->who);
323 if (bmval[1] & FATTR4_WORD1_MODE) {
326 READ32(iattr->ia_mode);
327 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
328 iattr->ia_valid |= ATTR_MODE;
330 if (bmval[1] & FATTR4_WORD1_OWNER) {
335 len += (XDR_QUADLEN(dummy32) << 2);
336 READMEM(buf, dummy32);
337 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
339 iattr->ia_valid |= ATTR_UID;
341 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
346 len += (XDR_QUADLEN(dummy32) << 2);
347 READMEM(buf, dummy32);
348 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
350 iattr->ia_valid |= ATTR_GID;
352 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
357 case NFS4_SET_TO_CLIENT_TIME:
358 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
359 all 32 bits of 'nseconds'. */
365 READ32(iattr->ia_atime.tv_sec);
366 READ32(iattr->ia_atime.tv_nsec);
367 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
369 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
371 case NFS4_SET_TO_SERVER_TIME:
372 iattr->ia_valid |= ATTR_ATIME;
378 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
383 case NFS4_SET_TO_CLIENT_TIME:
384 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
385 all 32 bits of 'nseconds'. */
391 READ32(iattr->ia_mtime.tv_sec);
392 READ32(iattr->ia_mtime.tv_nsec);
393 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 case NFS4_SET_TO_SERVER_TIME:
398 iattr->ia_valid |= ATTR_MTIME;
404 if (len != expected_len)
410 status = nfserrno(host_err);
415 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
419 READ_BUF(sizeof(stateid_t));
420 READ32(sid->si_generation);
421 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
427 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
432 READ32(access->ac_req_access);
438 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
442 close->cl_stateowner = NULL;
444 READ32(close->cl_seqid);
445 return nfsd4_decode_stateid(argp, &close->cl_stateid);
452 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
457 READ64(commit->co_offset);
458 READ32(commit->co_count);
464 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
469 READ32(create->cr_type);
470 switch (create->cr_type) {
473 READ32(create->cr_linklen);
474 READ_BUF(create->cr_linklen);
475 SAVEMEM(create->cr_linkname, create->cr_linklen);
480 READ32(create->cr_specdata1);
481 READ32(create->cr_specdata2);
491 READ32(create->cr_namelen);
492 READ_BUF(create->cr_namelen);
493 SAVEMEM(create->cr_name, create->cr_namelen);
494 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
497 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
504 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
506 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
510 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
512 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
516 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
521 READ32(link->li_namelen);
522 READ_BUF(link->li_namelen);
523 SAVEMEM(link->li_name, link->li_namelen);
524 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
531 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
535 lock->lk_replay_owner = NULL;
537 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
540 READ32(lock->lk_type);
541 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
543 READ32(lock->lk_reclaim);
544 READ64(lock->lk_offset);
545 READ64(lock->lk_length);
546 READ32(lock->lk_is_new);
548 if (lock->lk_is_new) {
550 READ32(lock->lk_new_open_seqid);
551 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
554 READ_BUF(8 + sizeof(clientid_t));
555 READ32(lock->lk_new_lock_seqid);
556 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
557 READ32(lock->lk_new_owner.len);
558 READ_BUF(lock->lk_new_owner.len);
559 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
561 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
565 READ32(lock->lk_old_lock_seqid);
572 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
577 READ32(lockt->lt_type);
578 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
580 READ64(lockt->lt_offset);
581 READ64(lockt->lt_length);
582 COPYMEM(&lockt->lt_clientid, 8);
583 READ32(lockt->lt_owner.len);
584 READ_BUF(lockt->lt_owner.len);
585 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
591 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
595 locku->lu_stateowner = NULL;
597 READ32(locku->lu_type);
598 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
600 READ32(locku->lu_seqid);
601 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
605 READ64(locku->lu_offset);
606 READ64(locku->lu_length);
612 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
617 READ32(lookup->lo_len);
618 READ_BUF(lookup->lo_len);
619 SAVEMEM(lookup->lo_name, lookup->lo_len);
620 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
627 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
631 memset(open->op_bmval, 0, sizeof(open->op_bmval));
632 open->op_iattr.ia_valid = 0;
633 open->op_stateowner = NULL;
635 /* seqid, share_access, share_deny, clientid, ownerlen */
636 READ_BUF(16 + sizeof(clientid_t));
637 READ32(open->op_seqid);
638 READ32(open->op_share_access);
639 READ32(open->op_share_deny);
640 COPYMEM(&open->op_clientid, sizeof(clientid_t));
641 READ32(open->op_owner.len);
643 /* owner, open_flag */
644 READ_BUF(open->op_owner.len + 4);
645 SAVEMEM(open->op_owner.data, open->op_owner.len);
646 READ32(open->op_create);
647 switch (open->op_create) {
648 case NFS4_OPEN_NOCREATE:
650 case NFS4_OPEN_CREATE:
652 READ32(open->op_createmode);
653 switch (open->op_createmode) {
654 case NFS4_CREATE_UNCHECKED:
655 case NFS4_CREATE_GUARDED:
656 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
659 case NFS4_CREATE_EXCLUSIVE:
661 COPYMEM(open->op_verf.data, 8);
673 READ32(open->op_claim_type);
674 switch (open->op_claim_type) {
675 case NFS4_OPEN_CLAIM_NULL:
676 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
678 READ32(open->op_fname.len);
679 READ_BUF(open->op_fname.len);
680 SAVEMEM(open->op_fname.data, open->op_fname.len);
681 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
684 case NFS4_OPEN_CLAIM_PREVIOUS:
686 READ32(open->op_delegate_type);
688 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
689 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
693 READ32(open->op_fname.len);
694 READ_BUF(open->op_fname.len);
695 SAVEMEM(open->op_fname.data, open->op_fname.len);
696 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
707 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
711 open_conf->oc_stateowner = NULL;
712 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
716 READ32(open_conf->oc_seqid);
722 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
726 open_down->od_stateowner = NULL;
727 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
731 READ32(open_down->od_seqid);
732 READ32(open_down->od_share_access);
733 READ32(open_down->od_share_deny);
739 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
744 READ32(putfh->pf_fhlen);
745 if (putfh->pf_fhlen > NFS4_FHSIZE)
747 READ_BUF(putfh->pf_fhlen);
748 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
754 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
758 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
762 READ64(read->rd_offset);
763 READ32(read->rd_length);
769 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
774 READ64(readdir->rd_cookie);
775 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
776 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
777 READ32(readdir->rd_maxcount);
778 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
785 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
790 READ32(remove->rm_namelen);
791 READ_BUF(remove->rm_namelen);
792 SAVEMEM(remove->rm_name, remove->rm_namelen);
793 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
800 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
805 READ32(rename->rn_snamelen);
806 READ_BUF(rename->rn_snamelen + 4);
807 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
808 READ32(rename->rn_tnamelen);
809 READ_BUF(rename->rn_tnamelen);
810 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
811 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
813 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
820 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
824 READ_BUF(sizeof(clientid_t));
825 COPYMEM(clientid, sizeof(clientid_t));
831 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
832 struct nfsd4_secinfo *secinfo)
837 READ32(secinfo->si_namelen);
838 READ_BUF(secinfo->si_namelen);
839 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
840 status = check_filename(secinfo->si_name, secinfo->si_namelen,
848 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
852 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
855 return nfsd4_decode_fattr(argp, setattr->sa_bmval,
856 &setattr->sa_iattr, &setattr->sa_acl);
860 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
865 COPYMEM(setclientid->se_verf.data, 8);
866 READ32(setclientid->se_namelen);
868 READ_BUF(setclientid->se_namelen + 8);
869 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
870 READ32(setclientid->se_callback_prog);
871 READ32(setclientid->se_callback_netid_len);
873 READ_BUF(setclientid->se_callback_netid_len + 4);
874 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
875 READ32(setclientid->se_callback_addr_len);
877 READ_BUF(setclientid->se_callback_addr_len + 4);
878 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
879 READ32(setclientid->se_callback_ident);
885 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
889 READ_BUF(8 + sizeof(nfs4_verifier));
890 COPYMEM(&scd_c->sc_clientid, 8);
891 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
896 /* Also used for NVERIFY */
898 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
901 struct nfsd4_compoundargs save = {
904 .rqstp = argp->rqstp,
907 struct iattr ve_iattr; /* request */
908 struct nfs4_acl *ve_acl; /* request */
912 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
915 /* For convenience's sake, we compare raw xdr'd attributes in
916 * nfsd4_proc_verify; however we still decode here just to return
917 * correct error in case of bad xdr. */
919 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
920 if (status == nfserr_inval) {
921 status = nfserrno(status);
926 READ32(verify->ve_attrlen);
927 READ_BUF(verify->ve_attrlen);
928 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
934 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
941 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
945 READ64(write->wr_offset);
946 READ32(write->wr_stable_how);
947 if (write->wr_stable_how > 2)
949 READ32(write->wr_buflen);
951 /* Sorry .. no magic macros for this.. *
952 * READ_BUF(write->wr_buflen);
953 * SAVEMEM(write->wr_buf, write->wr_buflen);
955 avail = (char*)argp->end - (char*)argp->p;
956 if (avail + argp->pagelen < write->wr_buflen) {
957 dprintk("NFSD: xdr error (%s:%d)\n",
961 argp->rqstp->rq_vec[0].iov_base = p;
962 argp->rqstp->rq_vec[0].iov_len = avail;
964 len = write->wr_buflen;
965 while (len > argp->rqstp->rq_vec[v].iov_len) {
966 len -= argp->rqstp->rq_vec[v].iov_len;
968 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
970 if (argp->pagelen >= PAGE_SIZE) {
971 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
972 argp->pagelen -= PAGE_SIZE;
974 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
975 argp->pagelen -= len;
978 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
979 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
980 argp->rqstp->rq_vec[v].iov_len = len;
981 write->wr_vlen = v+1;
987 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
992 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
993 READ32(rlockowner->rl_owner.len);
994 READ_BUF(rlockowner->rl_owner.len);
995 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1001 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1002 struct nfsd4_exchange_id *exid)
1007 READ_BUF(NFS4_VERIFIER_SIZE);
1008 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1011 READ32(exid->clname.len);
1013 READ_BUF(exid->clname.len);
1014 SAVEMEM(exid->clname.data, exid->clname.len);
1017 READ32(exid->flags);
1019 /* Ignore state_protect4_a */
1021 READ32(exid->spa_how);
1022 switch (exid->spa_how) {
1026 /* spo_must_enforce */
1029 READ_BUF(dummy * 4);
1032 /* spo_must_allow */
1035 READ_BUF(dummy * 4);
1042 READ_BUF(dummy * 4);
1047 READ_BUF(dummy * 4);
1050 /* ssp_hash_algs<> */
1054 p += XDR_QUADLEN(dummy);
1056 /* ssp_encr_algs<> */
1060 p += XDR_QUADLEN(dummy);
1062 /* ssp_window and ssp_num_gss_handles */
1071 /* Ignore Implementation ID */
1072 READ_BUF(4); /* nfs_impl_id4 array length */
1083 p += XDR_QUADLEN(dummy);
1089 p += XDR_QUADLEN(dummy);
1099 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1100 struct nfsd4_create_session *sess)
1110 COPYMEM(&sess->clientid, 8);
1111 READ32(sess->seqid);
1112 READ32(sess->flags);
1114 /* Fore channel attrs */
1116 READ32(dummy); /* headerpadsz is always 0 */
1117 READ32(sess->fore_channel.maxreq_sz);
1118 READ32(sess->fore_channel.maxresp_sz);
1119 READ32(sess->fore_channel.maxresp_cached);
1120 READ32(sess->fore_channel.maxops);
1121 READ32(sess->fore_channel.maxreqs);
1122 READ32(sess->fore_channel.nr_rdma_attrs);
1123 if (sess->fore_channel.nr_rdma_attrs == 1) {
1125 READ32(sess->fore_channel.rdma_attrs);
1126 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1127 dprintk("Too many fore channel attr bitmaps!\n");
1131 /* Back channel attrs */
1133 READ32(dummy); /* headerpadsz is always 0 */
1134 READ32(sess->back_channel.maxreq_sz);
1135 READ32(sess->back_channel.maxresp_sz);
1136 READ32(sess->back_channel.maxresp_cached);
1137 READ32(sess->back_channel.maxops);
1138 READ32(sess->back_channel.maxreqs);
1139 READ32(sess->back_channel.nr_rdma_attrs);
1140 if (sess->back_channel.nr_rdma_attrs == 1) {
1142 READ32(sess->back_channel.rdma_attrs);
1143 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1144 dprintk("Too many back channel attr bitmaps!\n");
1149 READ32(sess->callback_prog);
1151 /* callback_sec_params4 */
1152 READ32(nr_secflavs);
1153 for (i = 0; i < nr_secflavs; ++i) {
1158 /* Nothing to read */
1168 SAVEMEM(machine_name, dummy);
1178 READ_BUF(dummy * 4);
1179 for (i = 0; i < dummy; ++i)
1183 dprintk("RPC_AUTH_GSS callback secflavor "
1184 "not supported!\n");
1188 /* gcbp_handle_from_server */
1191 p += XDR_QUADLEN(dummy);
1192 /* gcbp_handle_from_client */
1196 p += XDR_QUADLEN(dummy);
1199 dprintk("Illegal callback secflavor\n");
1200 return nfserr_inval;
1207 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1208 struct nfsd4_destroy_session *destroy_session)
1210 return nfserr_opnotsupp; /* stub */
1214 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1215 struct nfsd4_sequence *seq)
1219 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1220 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1222 READ32(seq->slotid);
1223 READ32(seq->maxslots);
1224 READ32(seq->cachethis);
1230 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1236 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1238 return nfserr_notsupp;
1241 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1243 static nfsd4_dec nfsd4_dec_ops[] = {
1244 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1245 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1246 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1247 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1248 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1249 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1250 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1251 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1252 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1253 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1254 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1255 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1256 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1257 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1258 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1259 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1260 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1261 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1262 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1263 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1264 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1265 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1266 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1267 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1268 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1269 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1270 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1271 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1272 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1273 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1274 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1275 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1276 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1277 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1278 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1279 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1280 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1283 static nfsd4_dec nfsd41_dec_ops[] = {
1284 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1285 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1286 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1287 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1288 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1289 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1290 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1291 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1292 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1293 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1294 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1295 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1296 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1297 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1298 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1299 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1300 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1301 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1302 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1303 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1304 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1305 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1306 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1307 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1308 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1309 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1310 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1311 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1312 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1313 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1314 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1315 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1316 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1317 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1318 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1319 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1320 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1322 /* new operations for NFSv4.1 */
1323 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1324 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1325 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1326 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1327 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1328 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1329 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1330 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1331 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1332 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1333 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1334 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1335 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1337 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1340 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1341 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1344 struct nfsd4_minorversion_ops {
1345 nfsd4_dec *decoders;
1349 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1350 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1351 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1355 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1358 struct nfsd4_op *op;
1359 struct nfsd4_minorversion_ops *ops;
1363 * XXX: According to spec, we should check the tag
1364 * for UTF-8 compliance. I'm postponing this for
1365 * now because it seems that some clients do use
1369 READ32(argp->taglen);
1370 READ_BUF(argp->taglen + 8);
1371 SAVEMEM(argp->tag, argp->taglen);
1372 READ32(argp->minorversion);
1373 READ32(argp->opcnt);
1375 if (argp->taglen > NFSD4_MAX_TAGLEN)
1377 if (argp->opcnt > 100)
1380 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1381 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1383 argp->ops = argp->iops;
1384 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1389 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1392 ops = &nfsd4_minorversion[argp->minorversion];
1393 for (i = 0; i < argp->opcnt; i++) {
1398 * We can't use READ_BUF() here because we need to handle
1399 * a missing opcode as an OP_WRITE + 1. So we need to check
1400 * to see if we're truly at the end of our buffer or if there
1401 * is another page we need to flip to.
1404 if (argp->p == argp->end) {
1405 if (argp->pagelen < 4) {
1406 /* There isn't an opcode still on the wire */
1407 op->opnum = OP_WRITE + 1;
1408 op->status = nfserr_bad_xdr;
1414 * False alarm. We just hit a page boundary, but there
1415 * is still data available. Move pointer across page
1416 * boundary. *snip from READ_BUF*
1418 argp->p = page_address(argp->pagelist[0]);
1420 if (argp->pagelen < PAGE_SIZE) {
1421 argp->end = p + (argp->pagelen>>2);
1424 argp->end = p + (PAGE_SIZE>>2);
1425 argp->pagelen -= PAGE_SIZE;
1428 op->opnum = ntohl(*argp->p++);
1430 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1431 op->status = ops->decoders[op->opnum](argp, &op->u);
1433 op->opnum = OP_ILLEGAL;
1434 op->status = nfserr_op_illegal;
1446 * END OF "GENERIC" DECODE ROUTINES.
1450 * START OF "GENERIC" ENCODE ROUTINES.
1451 * These may look a little ugly since they are imported from a "generic"
1452 * set of XDR encode/decode routines which are intended to be shared by
1453 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1455 * If the pain of reading these is too great, it should be a straightforward
1456 * task to translate them into Linux-specific versions which are more
1457 * consistent with the style used in NFSv2/v3...
1459 #define ENCODE_HEAD __be32 *p
1461 #define WRITE32(n) *p++ = htonl(n)
1462 #define WRITE64(n) do { \
1463 *p++ = htonl((u32)((n) >> 32)); \
1464 *p++ = htonl((u32)(n)); \
1466 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1467 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1468 memcpy(p, ptr, nbytes); \
1469 p += XDR_QUADLEN(nbytes); \
1471 #define WRITECINFO(c) do { \
1472 *p++ = htonl(c.atomic); \
1473 *p++ = htonl(c.before_ctime_sec); \
1474 *p++ = htonl(c.before_ctime_nsec); \
1475 *p++ = htonl(c.after_ctime_sec); \
1476 *p++ = htonl(c.after_ctime_nsec); \
1479 #define RESERVE_SPACE(nbytes) do { \
1481 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1483 #define ADJUST_ARGS() resp->p = p
1486 * Header routine to setup seqid operation replay cache
1488 #define ENCODE_SEQID_OP_HEAD \
1494 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1495 * is where sequence id's are incremented, and the replay cache is filled.
1496 * Note that we increment sequence id's here, at the last moment, so we're sure
1497 * we know whether the error to be returned is a sequence id mutating error.
1500 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1501 if (seqid_mutating_err(nfserr) && stateowner) { \
1502 stateowner->so_seqid++; \
1503 stateowner->so_replay.rp_status = nfserr; \
1504 stateowner->so_replay.rp_buflen = \
1505 (((char *)(resp)->p - (char *)save)); \
1506 memcpy(stateowner->so_replay.rp_buf, save, \
1507 stateowner->so_replay.rp_buflen); \
1510 /* Encode as an array of strings the string given with components
1513 static __be32 nfsd4_encode_components(char sep, char *components,
1514 __be32 **pp, int *buflen)
1518 int strlen, count=0;
1521 dprintk("nfsd4_encode_components(%s)\n", components);
1522 if ((*buflen -= 4) < 0)
1523 return nfserr_resource;
1524 WRITE32(0); /* We will fill this in with @count later */
1525 end = str = components;
1527 for (; *end && (*end != sep); end++)
1528 ; /* Point to end of component */
1531 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1532 return nfserr_resource;
1534 WRITEMEM(str, strlen);
1548 * encode a location element of a fs_locations structure
1550 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1551 __be32 **pp, int *buflen)
1556 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1559 status = nfsd4_encode_components('/', location->path, &p, buflen);
1567 * Return the path to an export point in the pseudo filesystem namespace
1568 * Returned string is safe to use as long as the caller holds a reference
1571 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1573 struct svc_fh tmp_fh;
1574 char *path, *rootpath;
1576 fh_init(&tmp_fh, NFS4_FHSIZE);
1577 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1580 rootpath = tmp_fh.fh_export->ex_pathname;
1582 path = exp->ex_pathname;
1584 if (strncmp(path, rootpath, strlen(rootpath))) {
1585 dprintk("nfsd: fs_locations failed;"
1586 "%s is not contained in %s\n", path, rootpath);
1587 *stat = nfserr_notsupp;
1591 return path + strlen(rootpath);
1595 * encode a fs_locations structure
1597 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1598 struct svc_export *exp,
1599 __be32 **pp, int *buflen)
1604 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1605 char *root = nfsd4_path(rqstp, exp, &status);
1609 status = nfsd4_encode_components('/', root, &p, buflen);
1612 if ((*buflen -= 4) < 0)
1613 return nfserr_resource;
1614 WRITE32(fslocs->locations_count);
1615 for (i=0; i<fslocs->locations_count; i++) {
1616 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1625 static u32 nfs4_ftypes[16] = {
1626 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1627 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1628 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1629 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1633 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1634 __be32 **p, int *buflen)
1638 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1639 return nfserr_resource;
1640 if (whotype != NFS4_ACL_WHO_NAMED)
1641 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1643 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1645 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1647 return nfserrno(status);
1648 *p = xdr_encode_opaque(*p, NULL, status);
1649 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1650 BUG_ON(*buflen < 0);
1654 static inline __be32
1655 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1657 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1660 static inline __be32
1661 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1663 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1666 static inline __be32
1667 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1668 __be32 **p, int *buflen)
1670 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1673 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1674 FATTR4_WORD0_RDATTR_ERROR)
1675 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1677 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1679 /* As per referral draft: */
1680 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1681 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1682 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1683 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1684 *rdattr_err = NFSERR_MOVED;
1686 return nfserr_moved;
1688 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1689 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1694 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1697 * @countp is the buffer size in _words_; upon successful return this becomes
1698 * replaced with the number of words written.
1701 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1702 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1703 struct svc_rqst *rqstp, int ignore_crossmnt)
1705 u32 bmval0 = bmval[0];
1706 u32 bmval1 = bmval[1];
1708 struct svc_fh tempfh;
1709 struct kstatfs statfs;
1710 int buflen = *countp << 2;
1719 struct nfs4_acl *acl = NULL;
1721 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1722 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1723 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1725 if (exp->ex_fslocs.migrated) {
1726 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1731 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1734 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1735 FATTR4_WORD0_MAXNAME)) ||
1736 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1737 FATTR4_WORD1_SPACE_TOTAL))) {
1738 err = vfs_statfs(dentry, &statfs);
1742 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1743 fh_init(&tempfh, NFS4_FHSIZE);
1744 status = fh_compose(&tempfh, exp, dentry, NULL);
1749 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1750 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1751 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1752 aclsupport = (err == 0);
1753 if (bmval0 & FATTR4_WORD0_ACL) {
1754 if (err == -EOPNOTSUPP)
1755 bmval0 &= ~FATTR4_WORD0_ACL;
1756 else if (err == -EINVAL) {
1757 status = nfserr_attrnotsupp;
1759 } else if (err != 0)
1763 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1764 if (exp->ex_fslocs.locations == NULL) {
1765 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1768 if ((buflen -= 16) < 0)
1774 attrlenp = p++; /* to be backfilled later */
1776 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1777 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1778 if ((buflen -= 12) < 0)
1781 word0 &= ~FATTR4_WORD0_ACL;
1782 if (!exp->ex_fslocs.locations)
1783 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1786 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1788 if (bmval0 & FATTR4_WORD0_TYPE) {
1789 if ((buflen -= 4) < 0)
1791 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1792 if (dummy == NF4BAD)
1793 goto out_serverfault;
1796 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1797 if ((buflen -= 4) < 0)
1799 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1800 WRITE32(NFS4_FH_PERSISTENT);
1802 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1804 if (bmval0 & FATTR4_WORD0_CHANGE) {
1806 * Note: This _must_ be consistent with the scheme for writing
1807 * change_info, so any changes made here must be reflected there
1808 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1811 if ((buflen -= 8) < 0)
1813 WRITE32(stat.ctime.tv_sec);
1814 WRITE32(stat.ctime.tv_nsec);
1816 if (bmval0 & FATTR4_WORD0_SIZE) {
1817 if ((buflen -= 8) < 0)
1821 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1822 if ((buflen -= 4) < 0)
1826 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1827 if ((buflen -= 4) < 0)
1831 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1832 if ((buflen -= 4) < 0)
1836 if (bmval0 & FATTR4_WORD0_FSID) {
1837 if ((buflen -= 16) < 0)
1839 if (exp->ex_fslocs.migrated) {
1840 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1841 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1842 } else switch(fsid_source(fhp)) {
1843 case FSIDSOURCE_FSID:
1844 WRITE64((u64)exp->ex_fsid);
1847 case FSIDSOURCE_DEV:
1849 WRITE32(MAJOR(stat.dev));
1851 WRITE32(MINOR(stat.dev));
1853 case FSIDSOURCE_UUID:
1854 WRITEMEM(exp->ex_uuid, 16);
1858 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1859 if ((buflen -= 4) < 0)
1863 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1864 if ((buflen -= 4) < 0)
1866 WRITE32(NFSD_LEASE_TIME);
1868 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1869 if ((buflen -= 4) < 0)
1871 WRITE32(rdattr_err);
1873 if (bmval0 & FATTR4_WORD0_ACL) {
1874 struct nfs4_ace *ace;
1877 if ((buflen -= 4) < 0)
1883 if ((buflen -= 4) < 0)
1885 WRITE32(acl->naces);
1887 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1888 if ((buflen -= 4*3) < 0)
1892 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1893 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1894 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1896 if (status == nfserr_resource)
1903 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1904 if ((buflen -= 4) < 0)
1906 WRITE32(aclsupport ?
1907 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1909 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1910 if ((buflen -= 4) < 0)
1914 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1915 if ((buflen -= 4) < 0)
1919 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1920 if ((buflen -= 4) < 0)
1924 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1925 if ((buflen -= 4) < 0)
1929 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1930 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1933 WRITE32(fhp->fh_handle.fh_size);
1934 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1936 if (bmval0 & FATTR4_WORD0_FILEID) {
1937 if ((buflen -= 8) < 0)
1941 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1942 if ((buflen -= 8) < 0)
1944 WRITE64((u64) statfs.f_ffree);
1946 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1947 if ((buflen -= 8) < 0)
1949 WRITE64((u64) statfs.f_ffree);
1951 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1952 if ((buflen -= 8) < 0)
1954 WRITE64((u64) statfs.f_files);
1956 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1957 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1958 if (status == nfserr_resource)
1963 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1964 if ((buflen -= 4) < 0)
1968 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1969 if ((buflen -= 8) < 0)
1973 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1974 if ((buflen -= 4) < 0)
1978 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1979 if ((buflen -= 4) < 0)
1981 WRITE32(statfs.f_namelen);
1983 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1984 if ((buflen -= 8) < 0)
1986 WRITE64((u64) svc_max_payload(rqstp));
1988 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1989 if ((buflen -= 8) < 0)
1991 WRITE64((u64) svc_max_payload(rqstp));
1993 if (bmval1 & FATTR4_WORD1_MODE) {
1994 if ((buflen -= 4) < 0)
1996 WRITE32(stat.mode & S_IALLUGO);
1998 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1999 if ((buflen -= 4) < 0)
2003 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2004 if ((buflen -= 4) < 0)
2006 WRITE32(stat.nlink);
2008 if (bmval1 & FATTR4_WORD1_OWNER) {
2009 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2010 if (status == nfserr_resource)
2015 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2016 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2017 if (status == nfserr_resource)
2022 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2023 if ((buflen -= 8) < 0)
2025 WRITE32((u32) MAJOR(stat.rdev));
2026 WRITE32((u32) MINOR(stat.rdev));
2028 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2029 if ((buflen -= 8) < 0)
2031 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2034 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2035 if ((buflen -= 8) < 0)
2037 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2040 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2041 if ((buflen -= 8) < 0)
2043 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2046 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2047 if ((buflen -= 8) < 0)
2049 dummy64 = (u64)stat.blocks << 9;
2052 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2053 if ((buflen -= 12) < 0)
2056 WRITE32(stat.atime.tv_sec);
2057 WRITE32(stat.atime.tv_nsec);
2059 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2060 if ((buflen -= 12) < 0)
2066 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2067 if ((buflen -= 12) < 0)
2070 WRITE32(stat.ctime.tv_sec);
2071 WRITE32(stat.ctime.tv_nsec);
2073 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2074 if ((buflen -= 12) < 0)
2077 WRITE32(stat.mtime.tv_sec);
2078 WRITE32(stat.mtime.tv_nsec);
2080 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2081 if ((buflen -= 8) < 0)
2084 * Get parent's attributes if not ignoring crossmount
2085 * and this is the root of a cross-mounted filesystem.
2087 if (ignore_crossmnt == 0 &&
2088 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2089 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2090 exp->ex_path.mnt->mnt_mountpoint, &stat);
2096 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2097 *countp = p - buffer;
2106 status = nfserrno(err);
2110 status = nfserr_resource;
2113 status = nfserr_serverfault;
2117 static inline int attributes_need_mount(u32 *bmval)
2119 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2121 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2127 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2128 const char *name, int namlen, __be32 *p, int *buflen)
2130 struct svc_export *exp = cd->rd_fhp->fh_export;
2131 struct dentry *dentry;
2133 int ignore_crossmnt = 0;
2135 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2137 return nfserrno(PTR_ERR(dentry));
2141 * In the case of a mountpoint, the client may be asking for
2142 * attributes that are only properties of the underlying filesystem
2143 * as opposed to the cross-mounted file system. In such a case,
2144 * we will not follow the cross mount and will fill the attribtutes
2145 * directly from the mountpoint dentry.
2147 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2148 ignore_crossmnt = 1;
2149 else if (d_mountpoint(dentry)) {
2153 * Why the heck aren't we just using nfsd_lookup??
2154 * Different "."/".." handling? Something else?
2155 * At least, add a comment here to explain....
2157 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2159 nfserr = nfserrno(err);
2162 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2167 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2168 cd->rd_rqstp, ignore_crossmnt);
2176 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2183 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2184 *p++ = htonl(0); /* bmval1 */
2187 *p++ = nfserr; /* no htonl */
2188 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2193 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2194 loff_t offset, u64 ino, unsigned int d_type)
2196 struct readdir_cd *ccd = ccdv;
2197 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2199 __be32 *p = cd->buffer;
2200 __be32 nfserr = nfserr_toosmall;
2202 /* In nfsv4, "." and ".." never make it onto the wire.. */
2203 if (name && isdotent(name, namlen)) {
2204 cd->common.err = nfs_ok;
2209 xdr_encode_hyper(cd->offset, (u64) offset);
2211 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2215 *p++ = xdr_one; /* mark entry present */
2216 cd->offset = p; /* remember pointer */
2217 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2218 p = xdr_encode_array(p, name, namlen); /* name length & name */
2220 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2225 case nfserr_resource:
2226 nfserr = nfserr_toosmall;
2232 * If the client requested the RDATTR_ERROR attribute,
2233 * we stuff the error code into this attribute
2234 * and continue. If this attribute was not requested,
2235 * then in accordance with the spec, we fail the
2236 * entire READDIR operation(!)
2238 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2240 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2242 nfserr = nfserr_toosmall;
2246 cd->buflen -= (p - cd->buffer);
2248 cd->common.err = nfs_ok;
2251 cd->common.err = nfserr;
2256 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2260 RESERVE_SPACE(sizeof(stateid_t));
2261 WRITE32(sid->si_generation);
2262 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2267 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2273 WRITE32(access->ac_supported);
2274 WRITE32(access->ac_resp_access);
2281 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2283 ENCODE_SEQID_OP_HEAD;
2286 nfsd4_encode_stateid(resp, &close->cl_stateid);
2288 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2294 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2300 WRITEMEM(commit->co_verf.data, 8);
2307 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2313 WRITECINFO(create->cr_cinfo);
2315 WRITE32(create->cr_bmval[0]);
2316 WRITE32(create->cr_bmval[1]);
2323 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2325 struct svc_fh *fhp = getattr->ga_fhp;
2331 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2332 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2333 resp->p, &buflen, getattr->ga_bmval,
2341 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2343 struct svc_fh *fhp = *fhpp;
2348 len = fhp->fh_handle.fh_size;
2349 RESERVE_SPACE(len + 4);
2351 WRITEMEM(&fhp->fh_handle.fh_base, len);
2358 * Including all fields other than the name, a LOCK4denied structure requires
2359 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2362 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2366 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2367 WRITE64(ld->ld_start);
2368 WRITE64(ld->ld_length);
2369 WRITE32(ld->ld_type);
2371 WRITEMEM(&ld->ld_clientid, 8);
2372 WRITE32(ld->ld_sop->so_owner.len);
2373 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2374 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2375 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2376 WRITE64((u64)0); /* clientid */
2377 WRITE32(0); /* length of owner name */
2383 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2385 ENCODE_SEQID_OP_HEAD;
2388 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2389 else if (nfserr == nfserr_denied)
2390 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2392 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2397 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2399 if (nfserr == nfserr_denied)
2400 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2405 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2407 ENCODE_SEQID_OP_HEAD;
2410 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2412 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2418 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2424 WRITECINFO(link->li_cinfo);
2432 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2435 ENCODE_SEQID_OP_HEAD;
2440 nfsd4_encode_stateid(resp, &open->op_stateid);
2442 WRITECINFO(open->op_cinfo);
2443 WRITE32(open->op_rflags);
2445 WRITE32(open->op_bmval[0]);
2446 WRITE32(open->op_bmval[1]);
2447 WRITE32(open->op_delegate_type);
2450 switch (open->op_delegate_type) {
2451 case NFS4_OPEN_DELEGATE_NONE:
2453 case NFS4_OPEN_DELEGATE_READ:
2454 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2456 WRITE32(open->op_recall);
2459 * TODO: ACE's in delegations
2461 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2464 WRITE32(0); /* XXX: is NULL principal ok? */
2467 case NFS4_OPEN_DELEGATE_WRITE:
2468 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2473 * TODO: space_limit's in delegations
2475 WRITE32(NFS4_LIMIT_SIZE);
2480 * TODO: ACE's in delegations
2482 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2485 WRITE32(0); /* XXX: is NULL principal ok? */
2491 /* XXX save filehandle here */
2493 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2498 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2500 ENCODE_SEQID_OP_HEAD;
2503 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2505 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2510 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2512 ENCODE_SEQID_OP_HEAD;
2515 nfsd4_encode_stateid(resp, &od->od_stateid);
2517 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2522 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2523 struct nfsd4_read *read)
2527 unsigned long maxcount;
2533 if (resp->xbuf->page_len)
2534 return nfserr_resource;
2536 RESERVE_SPACE(8); /* eof flag and byte count */
2538 maxcount = svc_max_payload(resp->rqstp);
2539 if (maxcount > read->rd_length)
2540 maxcount = read->rd_length;
2545 pn = resp->rqstp->rq_resused++;
2546 resp->rqstp->rq_vec[v].iov_base =
2547 page_address(resp->rqstp->rq_respages[pn]);
2548 resp->rqstp->rq_vec[v].iov_len =
2549 len < PAGE_SIZE ? len : PAGE_SIZE;
2555 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2556 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2559 if (nfserr == nfserr_symlink)
2560 nfserr = nfserr_inval;
2563 eof = (read->rd_offset + maxcount >=
2564 read->rd_fhp->fh_dentry->d_inode->i_size);
2569 resp->xbuf->head[0].iov_len = (char*)p
2570 - (char*)resp->xbuf->head[0].iov_base;
2571 resp->xbuf->page_len = maxcount;
2573 /* Use rest of head for padding and remaining ops: */
2574 resp->xbuf->tail[0].iov_base = p;
2575 resp->xbuf->tail[0].iov_len = 0;
2579 resp->xbuf->tail[0].iov_base += maxcount&3;
2580 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2587 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2595 if (resp->xbuf->page_len)
2596 return nfserr_resource;
2598 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2600 maxcount = PAGE_SIZE;
2604 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2605 * if they would overflow the buffer. Is this kosher in NFSv4? If
2606 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2607 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2609 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2610 if (nfserr == nfserr_isdir)
2611 return nfserr_inval;
2617 resp->xbuf->head[0].iov_len = (char*)p
2618 - (char*)resp->xbuf->head[0].iov_base;
2619 resp->xbuf->page_len = maxcount;
2621 /* Use rest of head for padding and remaining ops: */
2622 resp->xbuf->tail[0].iov_base = p;
2623 resp->xbuf->tail[0].iov_len = 0;
2627 resp->xbuf->tail[0].iov_base += maxcount&3;
2628 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2635 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2639 __be32 *page, *savep, *tailbase;
2644 if (resp->xbuf->page_len)
2645 return nfserr_resource;
2647 RESERVE_SPACE(8); /* verifier */
2650 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2654 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2657 maxcount = PAGE_SIZE;
2658 if (maxcount > readdir->rd_maxcount)
2659 maxcount = readdir->rd_maxcount;
2662 * Convert from bytes to words, account for the two words already
2663 * written, make sure to leave two words at the end for the next
2664 * pointer and eof field.
2666 maxcount = (maxcount >> 2) - 4;
2668 nfserr = nfserr_toosmall;
2672 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2673 readdir->common.err = 0;
2674 readdir->buflen = maxcount;
2675 readdir->buffer = page;
2676 readdir->offset = NULL;
2678 offset = readdir->rd_cookie;
2679 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2681 &readdir->common, nfsd4_encode_dirent);
2682 if (nfserr == nfs_ok &&
2683 readdir->common.err == nfserr_toosmall &&
2684 readdir->buffer == page)
2685 nfserr = nfserr_toosmall;
2686 if (nfserr == nfserr_symlink)
2687 nfserr = nfserr_notdir;
2691 if (readdir->offset)
2692 xdr_encode_hyper(readdir->offset, offset);
2694 p = readdir->buffer;
2695 *p++ = 0; /* no more entries */
2696 *p++ = htonl(readdir->common.err == nfserr_eof);
2697 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2698 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2700 /* Use rest of head for padding and remaining ops: */
2701 resp->xbuf->tail[0].iov_base = tailbase;
2702 resp->xbuf->tail[0].iov_len = 0;
2703 resp->p = resp->xbuf->tail[0].iov_base;
2704 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2714 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2720 WRITECINFO(remove->rm_cinfo);
2727 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2733 WRITECINFO(rename->rn_sinfo);
2734 WRITECINFO(rename->rn_tinfo);
2741 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2742 struct nfsd4_secinfo *secinfo)
2745 struct svc_export *exp = secinfo->si_exp;
2747 struct exp_flavor_info *flavs;
2748 struct exp_flavor_info def_flavs[2];
2753 if (exp->ex_nflavors) {
2754 flavs = exp->ex_flavors;
2755 nflavs = exp->ex_nflavors;
2756 } else { /* Handling of some defaults in absence of real secinfo: */
2758 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2760 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2761 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2762 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2764 flavs[0].pseudoflavor
2765 = svcauth_gss_flavor(exp->ex_client);
2768 flavs[0].pseudoflavor
2769 = exp->ex_client->flavour->flavour;
2776 for (i = 0; i < nflavs; i++) {
2777 u32 flav = flavs[i].pseudoflavor;
2778 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2782 WRITE32(RPC_AUTH_GSS);
2784 RESERVE_SPACE(4 + gm->gm_oid.len);
2785 WRITE32(gm->gm_oid.len);
2786 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2789 WRITE32(0); /* qop */
2792 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2808 * The SETATTR encode routine is special -- it always encodes a bitmap,
2809 * regardless of the error status.
2812 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2824 WRITE32(setattr->sa_bmval[0]);
2825 WRITE32(setattr->sa_bmval[1]);
2832 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2837 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2838 WRITEMEM(&scd->se_clientid, 8);
2839 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2842 else if (nfserr == nfserr_clid_inuse) {
2852 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2858 WRITE32(write->wr_bytes_written);
2859 WRITE32(write->wr_how_written);
2860 WRITEMEM(write->wr_verifier.data, 8);
2867 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2868 struct nfsd4_exchange_id *exid)
2874 int server_scope_sz;
2875 uint64_t minor_id = 0;
2880 major_id = utsname()->nodename;
2881 major_id_sz = strlen(major_id);
2882 server_scope = utsname()->nodename;
2883 server_scope_sz = strlen(server_scope);
2886 8 /* eir_clientid */ +
2887 4 /* eir_sequenceid */ +
2889 4 /* spr_how (SP4_NONE) */ +
2890 8 /* so_minor_id */ +
2891 4 /* so_major_id.len */ +
2892 (XDR_QUADLEN(major_id_sz) * 4) +
2893 4 /* eir_server_scope.len */ +
2894 (XDR_QUADLEN(server_scope_sz) * 4) +
2895 4 /* eir_server_impl_id.count (0) */);
2897 WRITEMEM(&exid->clientid, 8);
2898 WRITE32(exid->seqid);
2899 WRITE32(exid->flags);
2901 /* state_protect4_r. Currently only support SP4_NONE */
2902 BUG_ON(exid->spa_how != SP4_NONE);
2903 WRITE32(exid->spa_how);
2905 /* The server_owner struct */
2906 WRITE64(minor_id); /* Minor id */
2908 WRITE32(major_id_sz);
2909 WRITEMEM(major_id, major_id_sz);
2912 WRITE32(server_scope_sz);
2913 WRITEMEM(server_scope, server_scope_sz);
2915 /* Implementation id */
2916 WRITE32(0); /* zero length nfs_impl_id4 array */
2922 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2923 struct nfsd4_create_session *sess)
2931 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2932 WRITE32(sess->seqid);
2933 WRITE32(sess->flags);
2937 WRITE32(0); /* headerpadsz */
2938 WRITE32(sess->fore_channel.maxreq_sz);
2939 WRITE32(sess->fore_channel.maxresp_sz);
2940 WRITE32(sess->fore_channel.maxresp_cached);
2941 WRITE32(sess->fore_channel.maxops);
2942 WRITE32(sess->fore_channel.maxreqs);
2943 WRITE32(sess->fore_channel.nr_rdma_attrs);
2946 if (sess->fore_channel.nr_rdma_attrs) {
2948 WRITE32(sess->fore_channel.rdma_attrs);
2953 WRITE32(0); /* headerpadsz */
2954 WRITE32(sess->back_channel.maxreq_sz);
2955 WRITE32(sess->back_channel.maxresp_sz);
2956 WRITE32(sess->back_channel.maxresp_cached);
2957 WRITE32(sess->back_channel.maxops);
2958 WRITE32(sess->back_channel.maxreqs);
2959 WRITE32(sess->back_channel.nr_rdma_attrs);
2962 if (sess->back_channel.nr_rdma_attrs) {
2964 WRITE32(sess->back_channel.rdma_attrs);
2971 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2972 struct nfsd4_destroy_session *destroy_session)
2979 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2980 struct nfsd4_sequence *seq)
2987 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
2988 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2989 WRITE32(seq->seqid);
2990 WRITE32(seq->slotid);
2991 WRITE32(seq->maxslots);
2994 * target_maxslots = maxslots
2997 WRITE32(seq->maxslots);
3005 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3010 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3013 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3014 * since we don't need to filter out obsolete ops as this is
3015 * done in the decoding phase.
3017 static nfsd4_enc nfsd4_enc_ops[] = {
3018 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3019 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3020 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3021 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3022 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3023 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3024 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3025 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3026 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3027 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3028 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3029 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3030 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3031 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3032 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3033 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3034 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3035 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3036 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3037 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3038 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3039 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3040 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3041 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3042 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3043 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3044 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3045 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3046 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3047 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3048 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3049 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3050 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3051 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3052 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3053 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3054 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3056 /* NFSv4.1 operations */
3057 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3058 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3059 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3060 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3061 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3062 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3063 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3064 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3065 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3066 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3067 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3068 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3069 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3070 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3071 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3072 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3073 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3074 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3075 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3079 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3086 statp = p++; /* to be backfilled at the end */
3089 if (op->opnum == OP_ILLEGAL)
3091 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3092 !nfsd4_enc_ops[op->opnum]);
3093 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3096 * Note: We write the status directly, instead of using WRITE32(),
3097 * since it is already in network byte order.
3099 *statp = op->status;
3103 * Encode the reply stored in the stateowner reply cache
3105 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3106 * previously sent already encoded operation.
3108 * called with nfs4_lock_state() held
3111 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3114 struct nfs4_replay *rp = op->replay;
3120 *p++ = rp->rp_status; /* already xdr'ed */
3123 RESERVE_SPACE(rp->rp_buflen);
3124 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3129 * END OF "GENERIC" ENCODE ROUTINES.
3133 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3135 return xdr_ressize_check(rqstp, p);
3138 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3140 if (args->ops != args->iops) {
3142 args->ops = args->iops;
3146 while (args->to_free) {
3147 struct tmpbuf *tb = args->to_free;
3148 args->to_free = tb->next;
3149 tb->release(tb->buf);
3155 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3160 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3161 args->pagelist = rqstp->rq_arg.pages;
3162 args->pagelen = rqstp->rq_arg.page_len;
3164 args->to_free = NULL;
3165 args->ops = args->iops;
3166 args->rqstp = rqstp;
3168 status = nfsd4_decode_compound(args);
3170 nfsd4_release_compoundargs(args);
3176 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3179 * All that remains is to write the tag and operation count...
3183 *p++ = htonl(resp->taglen);
3184 memcpy(p, resp->tag, resp->taglen);
3185 p += XDR_QUADLEN(resp->taglen);
3186 *p++ = htonl(resp->opcnt);
3188 if (rqstp->rq_res.page_len)
3189 iov = &rqstp->rq_res.tail[0];
3191 iov = &rqstp->rq_res.head[0];
3192 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3193 BUG_ON(iov->iov_len > PAGE_SIZE);
3194 if (resp->cstate.slot != NULL) {
3195 if (resp->cstate.status == nfserr_replay_cache) {
3196 iov->iov_len = resp->cstate.iovlen;
3198 nfsd4_store_cache_entry(resp);
3199 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3200 resp->cstate.slot->sl_inuse = 0;
3202 if (resp->cstate.session)
3203 nfsd4_put_session(resp->cstate.session);