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)
1102 return nfserr_opnotsupp; /* stub */
1106 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1107 struct nfsd4_destroy_session *destroy_session)
1109 return nfserr_opnotsupp; /* stub */
1113 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1114 struct nfsd4_sequence *seq)
1118 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1119 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1121 READ32(seq->slotid);
1122 READ32(seq->maxslots);
1123 READ32(seq->cachethis);
1129 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1135 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1137 return nfserr_notsupp;
1140 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1142 static nfsd4_dec nfsd4_dec_ops[] = {
1143 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1144 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1145 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1146 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1147 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1148 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1149 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1150 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1151 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1152 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1153 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1154 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1155 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1156 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1157 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1158 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1159 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1160 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1161 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1162 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1163 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1164 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1165 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1166 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1167 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1168 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1169 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1170 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1171 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1172 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1173 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1174 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1175 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1176 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1177 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1178 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1179 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1182 static nfsd4_dec nfsd41_dec_ops[] = {
1183 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1184 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1185 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1186 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1187 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1188 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1189 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1190 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1191 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1192 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1193 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1194 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1195 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1196 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1197 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1198 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1199 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1200 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1201 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1202 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1203 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1204 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1205 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1206 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1207 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1208 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1209 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1210 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1211 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1212 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1213 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1214 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1215 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1216 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1217 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1218 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1219 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1221 /* new operations for NFSv4.1 */
1222 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1223 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1224 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1225 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1226 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1227 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1228 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1229 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1230 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1231 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1232 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1233 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1234 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1235 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1236 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1237 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1238 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1239 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1240 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1243 struct nfsd4_minorversion_ops {
1244 nfsd4_dec *decoders;
1248 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1249 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1250 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1254 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1257 struct nfsd4_op *op;
1258 struct nfsd4_minorversion_ops *ops;
1262 * XXX: According to spec, we should check the tag
1263 * for UTF-8 compliance. I'm postponing this for
1264 * now because it seems that some clients do use
1268 READ32(argp->taglen);
1269 READ_BUF(argp->taglen + 8);
1270 SAVEMEM(argp->tag, argp->taglen);
1271 READ32(argp->minorversion);
1272 READ32(argp->opcnt);
1274 if (argp->taglen > NFSD4_MAX_TAGLEN)
1276 if (argp->opcnt > 100)
1279 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1280 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1282 argp->ops = argp->iops;
1283 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1288 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1291 ops = &nfsd4_minorversion[argp->minorversion];
1292 for (i = 0; i < argp->opcnt; i++) {
1297 * We can't use READ_BUF() here because we need to handle
1298 * a missing opcode as an OP_WRITE + 1. So we need to check
1299 * to see if we're truly at the end of our buffer or if there
1300 * is another page we need to flip to.
1303 if (argp->p == argp->end) {
1304 if (argp->pagelen < 4) {
1305 /* There isn't an opcode still on the wire */
1306 op->opnum = OP_WRITE + 1;
1307 op->status = nfserr_bad_xdr;
1313 * False alarm. We just hit a page boundary, but there
1314 * is still data available. Move pointer across page
1315 * boundary. *snip from READ_BUF*
1317 argp->p = page_address(argp->pagelist[0]);
1319 if (argp->pagelen < PAGE_SIZE) {
1320 argp->end = p + (argp->pagelen>>2);
1323 argp->end = p + (PAGE_SIZE>>2);
1324 argp->pagelen -= PAGE_SIZE;
1327 op->opnum = ntohl(*argp->p++);
1329 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1330 op->status = ops->decoders[op->opnum](argp, &op->u);
1332 op->opnum = OP_ILLEGAL;
1333 op->status = nfserr_op_illegal;
1345 * END OF "GENERIC" DECODE ROUTINES.
1349 * START OF "GENERIC" ENCODE ROUTINES.
1350 * These may look a little ugly since they are imported from a "generic"
1351 * set of XDR encode/decode routines which are intended to be shared by
1352 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1354 * If the pain of reading these is too great, it should be a straightforward
1355 * task to translate them into Linux-specific versions which are more
1356 * consistent with the style used in NFSv2/v3...
1358 #define ENCODE_HEAD __be32 *p
1360 #define WRITE32(n) *p++ = htonl(n)
1361 #define WRITE64(n) do { \
1362 *p++ = htonl((u32)((n) >> 32)); \
1363 *p++ = htonl((u32)(n)); \
1365 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1366 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1367 memcpy(p, ptr, nbytes); \
1368 p += XDR_QUADLEN(nbytes); \
1370 #define WRITECINFO(c) do { \
1371 *p++ = htonl(c.atomic); \
1372 *p++ = htonl(c.before_ctime_sec); \
1373 *p++ = htonl(c.before_ctime_nsec); \
1374 *p++ = htonl(c.after_ctime_sec); \
1375 *p++ = htonl(c.after_ctime_nsec); \
1378 #define RESERVE_SPACE(nbytes) do { \
1380 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1382 #define ADJUST_ARGS() resp->p = p
1385 * Header routine to setup seqid operation replay cache
1387 #define ENCODE_SEQID_OP_HEAD \
1393 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1394 * is where sequence id's are incremented, and the replay cache is filled.
1395 * Note that we increment sequence id's here, at the last moment, so we're sure
1396 * we know whether the error to be returned is a sequence id mutating error.
1399 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1400 if (seqid_mutating_err(nfserr) && stateowner) { \
1401 stateowner->so_seqid++; \
1402 stateowner->so_replay.rp_status = nfserr; \
1403 stateowner->so_replay.rp_buflen = \
1404 (((char *)(resp)->p - (char *)save)); \
1405 memcpy(stateowner->so_replay.rp_buf, save, \
1406 stateowner->so_replay.rp_buflen); \
1409 /* Encode as an array of strings the string given with components
1412 static __be32 nfsd4_encode_components(char sep, char *components,
1413 __be32 **pp, int *buflen)
1417 int strlen, count=0;
1420 dprintk("nfsd4_encode_components(%s)\n", components);
1421 if ((*buflen -= 4) < 0)
1422 return nfserr_resource;
1423 WRITE32(0); /* We will fill this in with @count later */
1424 end = str = components;
1426 for (; *end && (*end != sep); end++)
1427 ; /* Point to end of component */
1430 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1431 return nfserr_resource;
1433 WRITEMEM(str, strlen);
1447 * encode a location element of a fs_locations structure
1449 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1450 __be32 **pp, int *buflen)
1455 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1458 status = nfsd4_encode_components('/', location->path, &p, buflen);
1466 * Return the path to an export point in the pseudo filesystem namespace
1467 * Returned string is safe to use as long as the caller holds a reference
1470 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1472 struct svc_fh tmp_fh;
1473 char *path, *rootpath;
1475 fh_init(&tmp_fh, NFS4_FHSIZE);
1476 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1479 rootpath = tmp_fh.fh_export->ex_pathname;
1481 path = exp->ex_pathname;
1483 if (strncmp(path, rootpath, strlen(rootpath))) {
1484 dprintk("nfsd: fs_locations failed;"
1485 "%s is not contained in %s\n", path, rootpath);
1486 *stat = nfserr_notsupp;
1490 return path + strlen(rootpath);
1494 * encode a fs_locations structure
1496 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1497 struct svc_export *exp,
1498 __be32 **pp, int *buflen)
1503 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1504 char *root = nfsd4_path(rqstp, exp, &status);
1508 status = nfsd4_encode_components('/', root, &p, buflen);
1511 if ((*buflen -= 4) < 0)
1512 return nfserr_resource;
1513 WRITE32(fslocs->locations_count);
1514 for (i=0; i<fslocs->locations_count; i++) {
1515 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1524 static u32 nfs4_ftypes[16] = {
1525 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1526 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1527 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1528 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1532 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1533 __be32 **p, int *buflen)
1537 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1538 return nfserr_resource;
1539 if (whotype != NFS4_ACL_WHO_NAMED)
1540 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1542 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1544 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1546 return nfserrno(status);
1547 *p = xdr_encode_opaque(*p, NULL, status);
1548 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1549 BUG_ON(*buflen < 0);
1553 static inline __be32
1554 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1556 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1559 static inline __be32
1560 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1562 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1565 static inline __be32
1566 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1567 __be32 **p, int *buflen)
1569 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1572 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1573 FATTR4_WORD0_RDATTR_ERROR)
1574 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1576 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1578 /* As per referral draft: */
1579 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1580 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1581 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1582 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1583 *rdattr_err = NFSERR_MOVED;
1585 return nfserr_moved;
1587 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1588 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1593 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1596 * @countp is the buffer size in _words_; upon successful return this becomes
1597 * replaced with the number of words written.
1600 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1601 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1602 struct svc_rqst *rqstp, int ignore_crossmnt)
1604 u32 bmval0 = bmval[0];
1605 u32 bmval1 = bmval[1];
1607 struct svc_fh tempfh;
1608 struct kstatfs statfs;
1609 int buflen = *countp << 2;
1618 struct nfs4_acl *acl = NULL;
1620 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1621 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1622 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1624 if (exp->ex_fslocs.migrated) {
1625 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1630 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1633 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1634 FATTR4_WORD0_MAXNAME)) ||
1635 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1636 FATTR4_WORD1_SPACE_TOTAL))) {
1637 err = vfs_statfs(dentry, &statfs);
1641 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1642 fh_init(&tempfh, NFS4_FHSIZE);
1643 status = fh_compose(&tempfh, exp, dentry, NULL);
1648 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1649 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1650 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1651 aclsupport = (err == 0);
1652 if (bmval0 & FATTR4_WORD0_ACL) {
1653 if (err == -EOPNOTSUPP)
1654 bmval0 &= ~FATTR4_WORD0_ACL;
1655 else if (err == -EINVAL) {
1656 status = nfserr_attrnotsupp;
1658 } else if (err != 0)
1662 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1663 if (exp->ex_fslocs.locations == NULL) {
1664 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1667 if ((buflen -= 16) < 0)
1673 attrlenp = p++; /* to be backfilled later */
1675 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1676 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1677 if ((buflen -= 12) < 0)
1680 word0 &= ~FATTR4_WORD0_ACL;
1681 if (!exp->ex_fslocs.locations)
1682 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1685 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1687 if (bmval0 & FATTR4_WORD0_TYPE) {
1688 if ((buflen -= 4) < 0)
1690 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1691 if (dummy == NF4BAD)
1692 goto out_serverfault;
1695 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1696 if ((buflen -= 4) < 0)
1698 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1699 WRITE32(NFS4_FH_PERSISTENT);
1701 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1703 if (bmval0 & FATTR4_WORD0_CHANGE) {
1705 * Note: This _must_ be consistent with the scheme for writing
1706 * change_info, so any changes made here must be reflected there
1707 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1710 if ((buflen -= 8) < 0)
1712 WRITE32(stat.ctime.tv_sec);
1713 WRITE32(stat.ctime.tv_nsec);
1715 if (bmval0 & FATTR4_WORD0_SIZE) {
1716 if ((buflen -= 8) < 0)
1720 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1721 if ((buflen -= 4) < 0)
1725 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1726 if ((buflen -= 4) < 0)
1730 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1731 if ((buflen -= 4) < 0)
1735 if (bmval0 & FATTR4_WORD0_FSID) {
1736 if ((buflen -= 16) < 0)
1738 if (exp->ex_fslocs.migrated) {
1739 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1740 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1741 } else switch(fsid_source(fhp)) {
1742 case FSIDSOURCE_FSID:
1743 WRITE64((u64)exp->ex_fsid);
1746 case FSIDSOURCE_DEV:
1748 WRITE32(MAJOR(stat.dev));
1750 WRITE32(MINOR(stat.dev));
1752 case FSIDSOURCE_UUID:
1753 WRITEMEM(exp->ex_uuid, 16);
1757 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1758 if ((buflen -= 4) < 0)
1762 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1763 if ((buflen -= 4) < 0)
1765 WRITE32(NFSD_LEASE_TIME);
1767 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1768 if ((buflen -= 4) < 0)
1770 WRITE32(rdattr_err);
1772 if (bmval0 & FATTR4_WORD0_ACL) {
1773 struct nfs4_ace *ace;
1776 if ((buflen -= 4) < 0)
1782 if ((buflen -= 4) < 0)
1784 WRITE32(acl->naces);
1786 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1787 if ((buflen -= 4*3) < 0)
1791 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1792 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1793 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1795 if (status == nfserr_resource)
1802 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1803 if ((buflen -= 4) < 0)
1805 WRITE32(aclsupport ?
1806 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1808 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1809 if ((buflen -= 4) < 0)
1813 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1814 if ((buflen -= 4) < 0)
1818 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1819 if ((buflen -= 4) < 0)
1823 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1824 if ((buflen -= 4) < 0)
1828 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1829 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1832 WRITE32(fhp->fh_handle.fh_size);
1833 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1835 if (bmval0 & FATTR4_WORD0_FILEID) {
1836 if ((buflen -= 8) < 0)
1840 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1841 if ((buflen -= 8) < 0)
1843 WRITE64((u64) statfs.f_ffree);
1845 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1846 if ((buflen -= 8) < 0)
1848 WRITE64((u64) statfs.f_ffree);
1850 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1851 if ((buflen -= 8) < 0)
1853 WRITE64((u64) statfs.f_files);
1855 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1856 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1857 if (status == nfserr_resource)
1862 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1863 if ((buflen -= 4) < 0)
1867 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1868 if ((buflen -= 8) < 0)
1872 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1873 if ((buflen -= 4) < 0)
1877 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1878 if ((buflen -= 4) < 0)
1880 WRITE32(statfs.f_namelen);
1882 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1883 if ((buflen -= 8) < 0)
1885 WRITE64((u64) svc_max_payload(rqstp));
1887 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1888 if ((buflen -= 8) < 0)
1890 WRITE64((u64) svc_max_payload(rqstp));
1892 if (bmval1 & FATTR4_WORD1_MODE) {
1893 if ((buflen -= 4) < 0)
1895 WRITE32(stat.mode & S_IALLUGO);
1897 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1898 if ((buflen -= 4) < 0)
1902 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1903 if ((buflen -= 4) < 0)
1905 WRITE32(stat.nlink);
1907 if (bmval1 & FATTR4_WORD1_OWNER) {
1908 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1909 if (status == nfserr_resource)
1914 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1915 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1916 if (status == nfserr_resource)
1921 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1922 if ((buflen -= 8) < 0)
1924 WRITE32((u32) MAJOR(stat.rdev));
1925 WRITE32((u32) MINOR(stat.rdev));
1927 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1928 if ((buflen -= 8) < 0)
1930 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1933 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1934 if ((buflen -= 8) < 0)
1936 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1939 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1940 if ((buflen -= 8) < 0)
1942 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1945 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1946 if ((buflen -= 8) < 0)
1948 dummy64 = (u64)stat.blocks << 9;
1951 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1952 if ((buflen -= 12) < 0)
1955 WRITE32(stat.atime.tv_sec);
1956 WRITE32(stat.atime.tv_nsec);
1958 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1959 if ((buflen -= 12) < 0)
1965 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1966 if ((buflen -= 12) < 0)
1969 WRITE32(stat.ctime.tv_sec);
1970 WRITE32(stat.ctime.tv_nsec);
1972 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1973 if ((buflen -= 12) < 0)
1976 WRITE32(stat.mtime.tv_sec);
1977 WRITE32(stat.mtime.tv_nsec);
1979 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1980 if ((buflen -= 8) < 0)
1983 * Get parent's attributes if not ignoring crossmount
1984 * and this is the root of a cross-mounted filesystem.
1986 if (ignore_crossmnt == 0 &&
1987 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
1988 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
1989 exp->ex_path.mnt->mnt_mountpoint, &stat);
1995 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1996 *countp = p - buffer;
2005 status = nfserrno(err);
2009 status = nfserr_resource;
2012 status = nfserr_serverfault;
2016 static inline int attributes_need_mount(u32 *bmval)
2018 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2020 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2026 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2027 const char *name, int namlen, __be32 *p, int *buflen)
2029 struct svc_export *exp = cd->rd_fhp->fh_export;
2030 struct dentry *dentry;
2032 int ignore_crossmnt = 0;
2034 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2036 return nfserrno(PTR_ERR(dentry));
2040 * In the case of a mountpoint, the client may be asking for
2041 * attributes that are only properties of the underlying filesystem
2042 * as opposed to the cross-mounted file system. In such a case,
2043 * we will not follow the cross mount and will fill the attribtutes
2044 * directly from the mountpoint dentry.
2046 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2047 ignore_crossmnt = 1;
2048 else if (d_mountpoint(dentry)) {
2052 * Why the heck aren't we just using nfsd_lookup??
2053 * Different "."/".." handling? Something else?
2054 * At least, add a comment here to explain....
2056 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2058 nfserr = nfserrno(err);
2061 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2066 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2067 cd->rd_rqstp, ignore_crossmnt);
2075 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2082 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2083 *p++ = htonl(0); /* bmval1 */
2086 *p++ = nfserr; /* no htonl */
2087 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2092 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2093 loff_t offset, u64 ino, unsigned int d_type)
2095 struct readdir_cd *ccd = ccdv;
2096 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2098 __be32 *p = cd->buffer;
2099 __be32 nfserr = nfserr_toosmall;
2101 /* In nfsv4, "." and ".." never make it onto the wire.. */
2102 if (name && isdotent(name, namlen)) {
2103 cd->common.err = nfs_ok;
2108 xdr_encode_hyper(cd->offset, (u64) offset);
2110 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2114 *p++ = xdr_one; /* mark entry present */
2115 cd->offset = p; /* remember pointer */
2116 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2117 p = xdr_encode_array(p, name, namlen); /* name length & name */
2119 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2124 case nfserr_resource:
2125 nfserr = nfserr_toosmall;
2131 * If the client requested the RDATTR_ERROR attribute,
2132 * we stuff the error code into this attribute
2133 * and continue. If this attribute was not requested,
2134 * then in accordance with the spec, we fail the
2135 * entire READDIR operation(!)
2137 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2139 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2141 nfserr = nfserr_toosmall;
2145 cd->buflen -= (p - cd->buffer);
2147 cd->common.err = nfs_ok;
2150 cd->common.err = nfserr;
2155 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2159 RESERVE_SPACE(sizeof(stateid_t));
2160 WRITE32(sid->si_generation);
2161 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2166 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2172 WRITE32(access->ac_supported);
2173 WRITE32(access->ac_resp_access);
2180 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2182 ENCODE_SEQID_OP_HEAD;
2185 nfsd4_encode_stateid(resp, &close->cl_stateid);
2187 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2193 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2199 WRITEMEM(commit->co_verf.data, 8);
2206 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2212 WRITECINFO(create->cr_cinfo);
2214 WRITE32(create->cr_bmval[0]);
2215 WRITE32(create->cr_bmval[1]);
2222 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2224 struct svc_fh *fhp = getattr->ga_fhp;
2230 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2231 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2232 resp->p, &buflen, getattr->ga_bmval,
2240 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2242 struct svc_fh *fhp = *fhpp;
2247 len = fhp->fh_handle.fh_size;
2248 RESERVE_SPACE(len + 4);
2250 WRITEMEM(&fhp->fh_handle.fh_base, len);
2257 * Including all fields other than the name, a LOCK4denied structure requires
2258 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2261 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2265 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2266 WRITE64(ld->ld_start);
2267 WRITE64(ld->ld_length);
2268 WRITE32(ld->ld_type);
2270 WRITEMEM(&ld->ld_clientid, 8);
2271 WRITE32(ld->ld_sop->so_owner.len);
2272 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2273 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2274 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2275 WRITE64((u64)0); /* clientid */
2276 WRITE32(0); /* length of owner name */
2282 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2284 ENCODE_SEQID_OP_HEAD;
2287 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2288 else if (nfserr == nfserr_denied)
2289 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2291 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2296 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2298 if (nfserr == nfserr_denied)
2299 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2304 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2306 ENCODE_SEQID_OP_HEAD;
2309 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2311 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2317 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2323 WRITECINFO(link->li_cinfo);
2331 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2334 ENCODE_SEQID_OP_HEAD;
2339 nfsd4_encode_stateid(resp, &open->op_stateid);
2341 WRITECINFO(open->op_cinfo);
2342 WRITE32(open->op_rflags);
2344 WRITE32(open->op_bmval[0]);
2345 WRITE32(open->op_bmval[1]);
2346 WRITE32(open->op_delegate_type);
2349 switch (open->op_delegate_type) {
2350 case NFS4_OPEN_DELEGATE_NONE:
2352 case NFS4_OPEN_DELEGATE_READ:
2353 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2355 WRITE32(open->op_recall);
2358 * TODO: ACE's in delegations
2360 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2363 WRITE32(0); /* XXX: is NULL principal ok? */
2366 case NFS4_OPEN_DELEGATE_WRITE:
2367 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2372 * TODO: space_limit's in delegations
2374 WRITE32(NFS4_LIMIT_SIZE);
2379 * TODO: ACE's in delegations
2381 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2384 WRITE32(0); /* XXX: is NULL principal ok? */
2390 /* XXX save filehandle here */
2392 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2397 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2399 ENCODE_SEQID_OP_HEAD;
2402 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2404 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2409 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2411 ENCODE_SEQID_OP_HEAD;
2414 nfsd4_encode_stateid(resp, &od->od_stateid);
2416 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2421 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2422 struct nfsd4_read *read)
2426 unsigned long maxcount;
2432 if (resp->xbuf->page_len)
2433 return nfserr_resource;
2435 RESERVE_SPACE(8); /* eof flag and byte count */
2437 maxcount = svc_max_payload(resp->rqstp);
2438 if (maxcount > read->rd_length)
2439 maxcount = read->rd_length;
2444 pn = resp->rqstp->rq_resused++;
2445 resp->rqstp->rq_vec[v].iov_base =
2446 page_address(resp->rqstp->rq_respages[pn]);
2447 resp->rqstp->rq_vec[v].iov_len =
2448 len < PAGE_SIZE ? len : PAGE_SIZE;
2454 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2455 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2458 if (nfserr == nfserr_symlink)
2459 nfserr = nfserr_inval;
2462 eof = (read->rd_offset + maxcount >=
2463 read->rd_fhp->fh_dentry->d_inode->i_size);
2468 resp->xbuf->head[0].iov_len = (char*)p
2469 - (char*)resp->xbuf->head[0].iov_base;
2470 resp->xbuf->page_len = maxcount;
2472 /* Use rest of head for padding and remaining ops: */
2473 resp->xbuf->tail[0].iov_base = p;
2474 resp->xbuf->tail[0].iov_len = 0;
2478 resp->xbuf->tail[0].iov_base += maxcount&3;
2479 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2486 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2494 if (resp->xbuf->page_len)
2495 return nfserr_resource;
2497 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2499 maxcount = PAGE_SIZE;
2503 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2504 * if they would overflow the buffer. Is this kosher in NFSv4? If
2505 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2506 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2508 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2509 if (nfserr == nfserr_isdir)
2510 return nfserr_inval;
2516 resp->xbuf->head[0].iov_len = (char*)p
2517 - (char*)resp->xbuf->head[0].iov_base;
2518 resp->xbuf->page_len = maxcount;
2520 /* Use rest of head for padding and remaining ops: */
2521 resp->xbuf->tail[0].iov_base = p;
2522 resp->xbuf->tail[0].iov_len = 0;
2526 resp->xbuf->tail[0].iov_base += maxcount&3;
2527 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2534 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2538 __be32 *page, *savep, *tailbase;
2543 if (resp->xbuf->page_len)
2544 return nfserr_resource;
2546 RESERVE_SPACE(8); /* verifier */
2549 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2553 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2556 maxcount = PAGE_SIZE;
2557 if (maxcount > readdir->rd_maxcount)
2558 maxcount = readdir->rd_maxcount;
2561 * Convert from bytes to words, account for the two words already
2562 * written, make sure to leave two words at the end for the next
2563 * pointer and eof field.
2565 maxcount = (maxcount >> 2) - 4;
2567 nfserr = nfserr_toosmall;
2571 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2572 readdir->common.err = 0;
2573 readdir->buflen = maxcount;
2574 readdir->buffer = page;
2575 readdir->offset = NULL;
2577 offset = readdir->rd_cookie;
2578 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2580 &readdir->common, nfsd4_encode_dirent);
2581 if (nfserr == nfs_ok &&
2582 readdir->common.err == nfserr_toosmall &&
2583 readdir->buffer == page)
2584 nfserr = nfserr_toosmall;
2585 if (nfserr == nfserr_symlink)
2586 nfserr = nfserr_notdir;
2590 if (readdir->offset)
2591 xdr_encode_hyper(readdir->offset, offset);
2593 p = readdir->buffer;
2594 *p++ = 0; /* no more entries */
2595 *p++ = htonl(readdir->common.err == nfserr_eof);
2596 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2597 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2599 /* Use rest of head for padding and remaining ops: */
2600 resp->xbuf->tail[0].iov_base = tailbase;
2601 resp->xbuf->tail[0].iov_len = 0;
2602 resp->p = resp->xbuf->tail[0].iov_base;
2603 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2613 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2619 WRITECINFO(remove->rm_cinfo);
2626 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2632 WRITECINFO(rename->rn_sinfo);
2633 WRITECINFO(rename->rn_tinfo);
2640 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2641 struct nfsd4_secinfo *secinfo)
2644 struct svc_export *exp = secinfo->si_exp;
2646 struct exp_flavor_info *flavs;
2647 struct exp_flavor_info def_flavs[2];
2652 if (exp->ex_nflavors) {
2653 flavs = exp->ex_flavors;
2654 nflavs = exp->ex_nflavors;
2655 } else { /* Handling of some defaults in absence of real secinfo: */
2657 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2659 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2660 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2661 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2663 flavs[0].pseudoflavor
2664 = svcauth_gss_flavor(exp->ex_client);
2667 flavs[0].pseudoflavor
2668 = exp->ex_client->flavour->flavour;
2675 for (i = 0; i < nflavs; i++) {
2676 u32 flav = flavs[i].pseudoflavor;
2677 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2681 WRITE32(RPC_AUTH_GSS);
2683 RESERVE_SPACE(4 + gm->gm_oid.len);
2684 WRITE32(gm->gm_oid.len);
2685 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2688 WRITE32(0); /* qop */
2691 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2707 * The SETATTR encode routine is special -- it always encodes a bitmap,
2708 * regardless of the error status.
2711 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2723 WRITE32(setattr->sa_bmval[0]);
2724 WRITE32(setattr->sa_bmval[1]);
2731 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2736 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2737 WRITEMEM(&scd->se_clientid, 8);
2738 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2741 else if (nfserr == nfserr_clid_inuse) {
2751 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2757 WRITE32(write->wr_bytes_written);
2758 WRITE32(write->wr_how_written);
2759 WRITEMEM(write->wr_verifier.data, 8);
2766 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2767 struct nfsd4_exchange_id *exid)
2773 int server_scope_sz;
2774 uint64_t minor_id = 0;
2779 major_id = utsname()->nodename;
2780 major_id_sz = strlen(major_id);
2781 server_scope = utsname()->nodename;
2782 server_scope_sz = strlen(server_scope);
2785 8 /* eir_clientid */ +
2786 4 /* eir_sequenceid */ +
2788 4 /* spr_how (SP4_NONE) */ +
2789 8 /* so_minor_id */ +
2790 4 /* so_major_id.len */ +
2791 (XDR_QUADLEN(major_id_sz) * 4) +
2792 4 /* eir_server_scope.len */ +
2793 (XDR_QUADLEN(server_scope_sz) * 4) +
2794 4 /* eir_server_impl_id.count (0) */);
2796 WRITEMEM(&exid->clientid, 8);
2797 WRITE32(exid->seqid);
2798 WRITE32(exid->flags);
2800 /* state_protect4_r. Currently only support SP4_NONE */
2801 BUG_ON(exid->spa_how != SP4_NONE);
2802 WRITE32(exid->spa_how);
2804 /* The server_owner struct */
2805 WRITE64(minor_id); /* Minor id */
2807 WRITE32(major_id_sz);
2808 WRITEMEM(major_id, major_id_sz);
2811 WRITE32(server_scope_sz);
2812 WRITEMEM(server_scope, server_scope_sz);
2814 /* Implementation id */
2815 WRITE32(0); /* zero length nfs_impl_id4 array */
2821 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2822 struct nfsd4_create_session *sess)
2829 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2830 struct nfsd4_destroy_session *destroy_session)
2837 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2838 struct nfsd4_sequence *seq)
2845 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
2846 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2847 WRITE32(seq->seqid);
2848 WRITE32(seq->slotid);
2849 WRITE32(seq->maxslots);
2852 * target_maxslots = maxslots
2855 WRITE32(seq->maxslots);
2863 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
2868 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
2871 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
2872 * since we don't need to filter out obsolete ops as this is
2873 * done in the decoding phase.
2875 static nfsd4_enc nfsd4_enc_ops[] = {
2876 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
2877 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
2878 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
2879 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
2880 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
2881 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2882 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
2883 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
2884 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
2885 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
2886 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
2887 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
2888 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
2889 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
2890 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2891 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
2892 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
2893 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
2894 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
2895 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
2896 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
2897 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
2898 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
2899 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
2900 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
2901 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
2902 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
2903 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
2904 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
2905 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
2906 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
2907 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
2908 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
2909 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
2910 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2911 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
2912 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2914 /* NFSv4.1 operations */
2915 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
2916 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
2917 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
2918 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
2919 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
2920 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2921 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
2922 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
2923 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
2924 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
2925 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
2926 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2927 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
2928 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
2929 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
2930 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2931 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
2932 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
2933 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
2937 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2944 statp = p++; /* to be backfilled at the end */
2947 if (op->opnum == OP_ILLEGAL)
2949 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
2950 !nfsd4_enc_ops[op->opnum]);
2951 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
2954 * Note: We write the status directly, instead of using WRITE32(),
2955 * since it is already in network byte order.
2957 *statp = op->status;
2961 * Encode the reply stored in the stateowner reply cache
2963 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2964 * previously sent already encoded operation.
2966 * called with nfs4_lock_state() held
2969 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2972 struct nfs4_replay *rp = op->replay;
2978 *p++ = rp->rp_status; /* already xdr'ed */
2981 RESERVE_SPACE(rp->rp_buflen);
2982 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2987 * END OF "GENERIC" ENCODE ROUTINES.
2991 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
2993 return xdr_ressize_check(rqstp, p);
2996 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2998 if (args->ops != args->iops) {
3000 args->ops = args->iops;
3004 while (args->to_free) {
3005 struct tmpbuf *tb = args->to_free;
3006 args->to_free = tb->next;
3007 tb->release(tb->buf);
3013 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3018 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3019 args->pagelist = rqstp->rq_arg.pages;
3020 args->pagelen = rqstp->rq_arg.page_len;
3022 args->to_free = NULL;
3023 args->ops = args->iops;
3024 args->rqstp = rqstp;
3026 status = nfsd4_decode_compound(args);
3028 nfsd4_release_compoundargs(args);
3034 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3037 * All that remains is to write the tag and operation count...
3041 *p++ = htonl(resp->taglen);
3042 memcpy(p, resp->tag, resp->taglen);
3043 p += XDR_QUADLEN(resp->taglen);
3044 *p++ = htonl(resp->opcnt);
3046 if (rqstp->rq_res.page_len)
3047 iov = &rqstp->rq_res.tail[0];
3049 iov = &rqstp->rq_res.head[0];
3050 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3051 BUG_ON(iov->iov_len > PAGE_SIZE);