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)
1116 return nfserr_opnotsupp; /* stub */
1120 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1126 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1128 return nfserr_notsupp;
1131 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1133 static nfsd4_dec nfsd4_dec_ops[] = {
1134 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1135 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1136 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1137 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1138 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1139 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1140 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1141 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1142 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1143 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1144 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1145 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1146 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1147 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1148 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1149 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1150 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1151 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1152 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1153 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1154 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1155 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1156 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1157 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1158 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1159 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1160 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1161 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1162 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1163 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1164 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1165 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1166 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1167 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1168 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1169 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1170 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1173 static nfsd4_dec nfsd41_dec_ops[] = {
1174 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1175 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1176 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1177 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1178 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1179 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1180 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1181 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1182 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1183 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1184 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1185 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1186 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1187 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1188 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1189 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1190 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1191 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1192 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1193 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1194 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1195 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1196 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1197 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1198 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1199 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1200 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1201 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1202 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1203 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1204 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1205 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1206 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1207 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1208 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1209 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1210 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1212 /* new operations for NFSv4.1 */
1213 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1214 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1215 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1216 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1217 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1218 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1219 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1220 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1221 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1222 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1223 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1224 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1225 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1226 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1227 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1228 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1229 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1230 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1231 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1234 struct nfsd4_minorversion_ops {
1235 nfsd4_dec *decoders;
1239 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1240 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1241 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1245 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1248 struct nfsd4_op *op;
1249 struct nfsd4_minorversion_ops *ops;
1253 * XXX: According to spec, we should check the tag
1254 * for UTF-8 compliance. I'm postponing this for
1255 * now because it seems that some clients do use
1259 READ32(argp->taglen);
1260 READ_BUF(argp->taglen + 8);
1261 SAVEMEM(argp->tag, argp->taglen);
1262 READ32(argp->minorversion);
1263 READ32(argp->opcnt);
1265 if (argp->taglen > NFSD4_MAX_TAGLEN)
1267 if (argp->opcnt > 100)
1270 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1271 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1273 argp->ops = argp->iops;
1274 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1279 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1282 ops = &nfsd4_minorversion[argp->minorversion];
1283 for (i = 0; i < argp->opcnt; i++) {
1288 * We can't use READ_BUF() here because we need to handle
1289 * a missing opcode as an OP_WRITE + 1. So we need to check
1290 * to see if we're truly at the end of our buffer or if there
1291 * is another page we need to flip to.
1294 if (argp->p == argp->end) {
1295 if (argp->pagelen < 4) {
1296 /* There isn't an opcode still on the wire */
1297 op->opnum = OP_WRITE + 1;
1298 op->status = nfserr_bad_xdr;
1304 * False alarm. We just hit a page boundary, but there
1305 * is still data available. Move pointer across page
1306 * boundary. *snip from READ_BUF*
1308 argp->p = page_address(argp->pagelist[0]);
1310 if (argp->pagelen < PAGE_SIZE) {
1311 argp->end = p + (argp->pagelen>>2);
1314 argp->end = p + (PAGE_SIZE>>2);
1315 argp->pagelen -= PAGE_SIZE;
1318 op->opnum = ntohl(*argp->p++);
1320 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1321 op->status = ops->decoders[op->opnum](argp, &op->u);
1323 op->opnum = OP_ILLEGAL;
1324 op->status = nfserr_op_illegal;
1336 * END OF "GENERIC" DECODE ROUTINES.
1340 * START OF "GENERIC" ENCODE ROUTINES.
1341 * These may look a little ugly since they are imported from a "generic"
1342 * set of XDR encode/decode routines which are intended to be shared by
1343 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1345 * If the pain of reading these is too great, it should be a straightforward
1346 * task to translate them into Linux-specific versions which are more
1347 * consistent with the style used in NFSv2/v3...
1349 #define ENCODE_HEAD __be32 *p
1351 #define WRITE32(n) *p++ = htonl(n)
1352 #define WRITE64(n) do { \
1353 *p++ = htonl((u32)((n) >> 32)); \
1354 *p++ = htonl((u32)(n)); \
1356 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1357 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1358 memcpy(p, ptr, nbytes); \
1359 p += XDR_QUADLEN(nbytes); \
1361 #define WRITECINFO(c) do { \
1362 *p++ = htonl(c.atomic); \
1363 *p++ = htonl(c.before_ctime_sec); \
1364 *p++ = htonl(c.before_ctime_nsec); \
1365 *p++ = htonl(c.after_ctime_sec); \
1366 *p++ = htonl(c.after_ctime_nsec); \
1369 #define RESERVE_SPACE(nbytes) do { \
1371 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1373 #define ADJUST_ARGS() resp->p = p
1376 * Header routine to setup seqid operation replay cache
1378 #define ENCODE_SEQID_OP_HEAD \
1384 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1385 * is where sequence id's are incremented, and the replay cache is filled.
1386 * Note that we increment sequence id's here, at the last moment, so we're sure
1387 * we know whether the error to be returned is a sequence id mutating error.
1390 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1391 if (seqid_mutating_err(nfserr) && stateowner) { \
1392 stateowner->so_seqid++; \
1393 stateowner->so_replay.rp_status = nfserr; \
1394 stateowner->so_replay.rp_buflen = \
1395 (((char *)(resp)->p - (char *)save)); \
1396 memcpy(stateowner->so_replay.rp_buf, save, \
1397 stateowner->so_replay.rp_buflen); \
1400 /* Encode as an array of strings the string given with components
1403 static __be32 nfsd4_encode_components(char sep, char *components,
1404 __be32 **pp, int *buflen)
1408 int strlen, count=0;
1411 dprintk("nfsd4_encode_components(%s)\n", components);
1412 if ((*buflen -= 4) < 0)
1413 return nfserr_resource;
1414 WRITE32(0); /* We will fill this in with @count later */
1415 end = str = components;
1417 for (; *end && (*end != sep); end++)
1418 ; /* Point to end of component */
1421 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1422 return nfserr_resource;
1424 WRITEMEM(str, strlen);
1438 * encode a location element of a fs_locations structure
1440 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1441 __be32 **pp, int *buflen)
1446 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1449 status = nfsd4_encode_components('/', location->path, &p, buflen);
1457 * Return the path to an export point in the pseudo filesystem namespace
1458 * Returned string is safe to use as long as the caller holds a reference
1461 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1463 struct svc_fh tmp_fh;
1464 char *path, *rootpath;
1466 fh_init(&tmp_fh, NFS4_FHSIZE);
1467 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1470 rootpath = tmp_fh.fh_export->ex_pathname;
1472 path = exp->ex_pathname;
1474 if (strncmp(path, rootpath, strlen(rootpath))) {
1475 dprintk("nfsd: fs_locations failed;"
1476 "%s is not contained in %s\n", path, rootpath);
1477 *stat = nfserr_notsupp;
1481 return path + strlen(rootpath);
1485 * encode a fs_locations structure
1487 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1488 struct svc_export *exp,
1489 __be32 **pp, int *buflen)
1494 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1495 char *root = nfsd4_path(rqstp, exp, &status);
1499 status = nfsd4_encode_components('/', root, &p, buflen);
1502 if ((*buflen -= 4) < 0)
1503 return nfserr_resource;
1504 WRITE32(fslocs->locations_count);
1505 for (i=0; i<fslocs->locations_count; i++) {
1506 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1515 static u32 nfs4_ftypes[16] = {
1516 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1517 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1518 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1519 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1523 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1524 __be32 **p, int *buflen)
1528 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1529 return nfserr_resource;
1530 if (whotype != NFS4_ACL_WHO_NAMED)
1531 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1533 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1535 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1537 return nfserrno(status);
1538 *p = xdr_encode_opaque(*p, NULL, status);
1539 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1540 BUG_ON(*buflen < 0);
1544 static inline __be32
1545 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1547 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1550 static inline __be32
1551 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1553 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1556 static inline __be32
1557 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1558 __be32 **p, int *buflen)
1560 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1563 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1564 FATTR4_WORD0_RDATTR_ERROR)
1565 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1567 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1569 /* As per referral draft: */
1570 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1571 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1572 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1573 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1574 *rdattr_err = NFSERR_MOVED;
1576 return nfserr_moved;
1578 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1579 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1584 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1587 * @countp is the buffer size in _words_; upon successful return this becomes
1588 * replaced with the number of words written.
1591 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1592 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1593 struct svc_rqst *rqstp, int ignore_crossmnt)
1595 u32 bmval0 = bmval[0];
1596 u32 bmval1 = bmval[1];
1598 struct svc_fh tempfh;
1599 struct kstatfs statfs;
1600 int buflen = *countp << 2;
1609 struct nfs4_acl *acl = NULL;
1611 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1612 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1613 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1615 if (exp->ex_fslocs.migrated) {
1616 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1621 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1624 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1625 FATTR4_WORD0_MAXNAME)) ||
1626 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1627 FATTR4_WORD1_SPACE_TOTAL))) {
1628 err = vfs_statfs(dentry, &statfs);
1632 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1633 fh_init(&tempfh, NFS4_FHSIZE);
1634 status = fh_compose(&tempfh, exp, dentry, NULL);
1639 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1640 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1641 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1642 aclsupport = (err == 0);
1643 if (bmval0 & FATTR4_WORD0_ACL) {
1644 if (err == -EOPNOTSUPP)
1645 bmval0 &= ~FATTR4_WORD0_ACL;
1646 else if (err == -EINVAL) {
1647 status = nfserr_attrnotsupp;
1649 } else if (err != 0)
1653 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1654 if (exp->ex_fslocs.locations == NULL) {
1655 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1658 if ((buflen -= 16) < 0)
1664 attrlenp = p++; /* to be backfilled later */
1666 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1667 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1668 if ((buflen -= 12) < 0)
1671 word0 &= ~FATTR4_WORD0_ACL;
1672 if (!exp->ex_fslocs.locations)
1673 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1676 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1678 if (bmval0 & FATTR4_WORD0_TYPE) {
1679 if ((buflen -= 4) < 0)
1681 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1682 if (dummy == NF4BAD)
1683 goto out_serverfault;
1686 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1687 if ((buflen -= 4) < 0)
1689 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1690 WRITE32(NFS4_FH_PERSISTENT);
1692 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1694 if (bmval0 & FATTR4_WORD0_CHANGE) {
1696 * Note: This _must_ be consistent with the scheme for writing
1697 * change_info, so any changes made here must be reflected there
1698 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1701 if ((buflen -= 8) < 0)
1703 WRITE32(stat.ctime.tv_sec);
1704 WRITE32(stat.ctime.tv_nsec);
1706 if (bmval0 & FATTR4_WORD0_SIZE) {
1707 if ((buflen -= 8) < 0)
1711 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1712 if ((buflen -= 4) < 0)
1716 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1717 if ((buflen -= 4) < 0)
1721 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1722 if ((buflen -= 4) < 0)
1726 if (bmval0 & FATTR4_WORD0_FSID) {
1727 if ((buflen -= 16) < 0)
1729 if (exp->ex_fslocs.migrated) {
1730 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1731 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1732 } else switch(fsid_source(fhp)) {
1733 case FSIDSOURCE_FSID:
1734 WRITE64((u64)exp->ex_fsid);
1737 case FSIDSOURCE_DEV:
1739 WRITE32(MAJOR(stat.dev));
1741 WRITE32(MINOR(stat.dev));
1743 case FSIDSOURCE_UUID:
1744 WRITEMEM(exp->ex_uuid, 16);
1748 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1749 if ((buflen -= 4) < 0)
1753 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1754 if ((buflen -= 4) < 0)
1756 WRITE32(NFSD_LEASE_TIME);
1758 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1759 if ((buflen -= 4) < 0)
1761 WRITE32(rdattr_err);
1763 if (bmval0 & FATTR4_WORD0_ACL) {
1764 struct nfs4_ace *ace;
1767 if ((buflen -= 4) < 0)
1773 if ((buflen -= 4) < 0)
1775 WRITE32(acl->naces);
1777 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1778 if ((buflen -= 4*3) < 0)
1782 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1783 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1784 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1786 if (status == nfserr_resource)
1793 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1794 if ((buflen -= 4) < 0)
1796 WRITE32(aclsupport ?
1797 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1799 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1800 if ((buflen -= 4) < 0)
1804 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1805 if ((buflen -= 4) < 0)
1809 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1810 if ((buflen -= 4) < 0)
1814 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1815 if ((buflen -= 4) < 0)
1819 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1820 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1823 WRITE32(fhp->fh_handle.fh_size);
1824 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1826 if (bmval0 & FATTR4_WORD0_FILEID) {
1827 if ((buflen -= 8) < 0)
1831 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1832 if ((buflen -= 8) < 0)
1834 WRITE64((u64) statfs.f_ffree);
1836 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1837 if ((buflen -= 8) < 0)
1839 WRITE64((u64) statfs.f_ffree);
1841 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1842 if ((buflen -= 8) < 0)
1844 WRITE64((u64) statfs.f_files);
1846 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1847 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1848 if (status == nfserr_resource)
1853 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1854 if ((buflen -= 4) < 0)
1858 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1859 if ((buflen -= 8) < 0)
1863 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1864 if ((buflen -= 4) < 0)
1868 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1869 if ((buflen -= 4) < 0)
1871 WRITE32(statfs.f_namelen);
1873 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1874 if ((buflen -= 8) < 0)
1876 WRITE64((u64) svc_max_payload(rqstp));
1878 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1879 if ((buflen -= 8) < 0)
1881 WRITE64((u64) svc_max_payload(rqstp));
1883 if (bmval1 & FATTR4_WORD1_MODE) {
1884 if ((buflen -= 4) < 0)
1886 WRITE32(stat.mode & S_IALLUGO);
1888 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1889 if ((buflen -= 4) < 0)
1893 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1894 if ((buflen -= 4) < 0)
1896 WRITE32(stat.nlink);
1898 if (bmval1 & FATTR4_WORD1_OWNER) {
1899 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1900 if (status == nfserr_resource)
1905 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1906 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1907 if (status == nfserr_resource)
1912 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1913 if ((buflen -= 8) < 0)
1915 WRITE32((u32) MAJOR(stat.rdev));
1916 WRITE32((u32) MINOR(stat.rdev));
1918 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1919 if ((buflen -= 8) < 0)
1921 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1924 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1925 if ((buflen -= 8) < 0)
1927 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1930 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1931 if ((buflen -= 8) < 0)
1933 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1936 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1937 if ((buflen -= 8) < 0)
1939 dummy64 = (u64)stat.blocks << 9;
1942 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1943 if ((buflen -= 12) < 0)
1946 WRITE32(stat.atime.tv_sec);
1947 WRITE32(stat.atime.tv_nsec);
1949 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1950 if ((buflen -= 12) < 0)
1956 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1957 if ((buflen -= 12) < 0)
1960 WRITE32(stat.ctime.tv_sec);
1961 WRITE32(stat.ctime.tv_nsec);
1963 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1964 if ((buflen -= 12) < 0)
1967 WRITE32(stat.mtime.tv_sec);
1968 WRITE32(stat.mtime.tv_nsec);
1970 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1971 if ((buflen -= 8) < 0)
1974 * Get parent's attributes if not ignoring crossmount
1975 * and this is the root of a cross-mounted filesystem.
1977 if (ignore_crossmnt == 0 &&
1978 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
1979 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
1980 exp->ex_path.mnt->mnt_mountpoint, &stat);
1986 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1987 *countp = p - buffer;
1996 status = nfserrno(err);
2000 status = nfserr_resource;
2003 status = nfserr_serverfault;
2007 static inline int attributes_need_mount(u32 *bmval)
2009 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2011 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2017 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2018 const char *name, int namlen, __be32 *p, int *buflen)
2020 struct svc_export *exp = cd->rd_fhp->fh_export;
2021 struct dentry *dentry;
2023 int ignore_crossmnt = 0;
2025 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2027 return nfserrno(PTR_ERR(dentry));
2031 * In the case of a mountpoint, the client may be asking for
2032 * attributes that are only properties of the underlying filesystem
2033 * as opposed to the cross-mounted file system. In such a case,
2034 * we will not follow the cross mount and will fill the attribtutes
2035 * directly from the mountpoint dentry.
2037 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2038 ignore_crossmnt = 1;
2039 else if (d_mountpoint(dentry)) {
2043 * Why the heck aren't we just using nfsd_lookup??
2044 * Different "."/".." handling? Something else?
2045 * At least, add a comment here to explain....
2047 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2049 nfserr = nfserrno(err);
2052 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2057 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2058 cd->rd_rqstp, ignore_crossmnt);
2066 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2073 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2074 *p++ = htonl(0); /* bmval1 */
2077 *p++ = nfserr; /* no htonl */
2078 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2083 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2084 loff_t offset, u64 ino, unsigned int d_type)
2086 struct readdir_cd *ccd = ccdv;
2087 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2089 __be32 *p = cd->buffer;
2090 __be32 nfserr = nfserr_toosmall;
2092 /* In nfsv4, "." and ".." never make it onto the wire.. */
2093 if (name && isdotent(name, namlen)) {
2094 cd->common.err = nfs_ok;
2099 xdr_encode_hyper(cd->offset, (u64) offset);
2101 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2105 *p++ = xdr_one; /* mark entry present */
2106 cd->offset = p; /* remember pointer */
2107 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2108 p = xdr_encode_array(p, name, namlen); /* name length & name */
2110 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2115 case nfserr_resource:
2116 nfserr = nfserr_toosmall;
2122 * If the client requested the RDATTR_ERROR attribute,
2123 * we stuff the error code into this attribute
2124 * and continue. If this attribute was not requested,
2125 * then in accordance with the spec, we fail the
2126 * entire READDIR operation(!)
2128 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2130 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2132 nfserr = nfserr_toosmall;
2136 cd->buflen -= (p - cd->buffer);
2138 cd->common.err = nfs_ok;
2141 cd->common.err = nfserr;
2146 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2150 RESERVE_SPACE(sizeof(stateid_t));
2151 WRITE32(sid->si_generation);
2152 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2157 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2163 WRITE32(access->ac_supported);
2164 WRITE32(access->ac_resp_access);
2171 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2173 ENCODE_SEQID_OP_HEAD;
2176 nfsd4_encode_stateid(resp, &close->cl_stateid);
2178 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2184 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2190 WRITEMEM(commit->co_verf.data, 8);
2197 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2203 WRITECINFO(create->cr_cinfo);
2205 WRITE32(create->cr_bmval[0]);
2206 WRITE32(create->cr_bmval[1]);
2213 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2215 struct svc_fh *fhp = getattr->ga_fhp;
2221 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2222 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2223 resp->p, &buflen, getattr->ga_bmval,
2231 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2233 struct svc_fh *fhp = *fhpp;
2238 len = fhp->fh_handle.fh_size;
2239 RESERVE_SPACE(len + 4);
2241 WRITEMEM(&fhp->fh_handle.fh_base, len);
2248 * Including all fields other than the name, a LOCK4denied structure requires
2249 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2252 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2256 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2257 WRITE64(ld->ld_start);
2258 WRITE64(ld->ld_length);
2259 WRITE32(ld->ld_type);
2261 WRITEMEM(&ld->ld_clientid, 8);
2262 WRITE32(ld->ld_sop->so_owner.len);
2263 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2264 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2265 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2266 WRITE64((u64)0); /* clientid */
2267 WRITE32(0); /* length of owner name */
2273 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2275 ENCODE_SEQID_OP_HEAD;
2278 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2279 else if (nfserr == nfserr_denied)
2280 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2282 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2287 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2289 if (nfserr == nfserr_denied)
2290 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2295 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2297 ENCODE_SEQID_OP_HEAD;
2300 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2302 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2308 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2314 WRITECINFO(link->li_cinfo);
2322 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2325 ENCODE_SEQID_OP_HEAD;
2330 nfsd4_encode_stateid(resp, &open->op_stateid);
2332 WRITECINFO(open->op_cinfo);
2333 WRITE32(open->op_rflags);
2335 WRITE32(open->op_bmval[0]);
2336 WRITE32(open->op_bmval[1]);
2337 WRITE32(open->op_delegate_type);
2340 switch (open->op_delegate_type) {
2341 case NFS4_OPEN_DELEGATE_NONE:
2343 case NFS4_OPEN_DELEGATE_READ:
2344 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2346 WRITE32(open->op_recall);
2349 * TODO: ACE's in delegations
2351 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2354 WRITE32(0); /* XXX: is NULL principal ok? */
2357 case NFS4_OPEN_DELEGATE_WRITE:
2358 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2363 * TODO: space_limit's in delegations
2365 WRITE32(NFS4_LIMIT_SIZE);
2370 * TODO: ACE's in delegations
2372 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2375 WRITE32(0); /* XXX: is NULL principal ok? */
2381 /* XXX save filehandle here */
2383 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2388 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2390 ENCODE_SEQID_OP_HEAD;
2393 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2395 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2400 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2402 ENCODE_SEQID_OP_HEAD;
2405 nfsd4_encode_stateid(resp, &od->od_stateid);
2407 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2412 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2413 struct nfsd4_read *read)
2417 unsigned long maxcount;
2423 if (resp->xbuf->page_len)
2424 return nfserr_resource;
2426 RESERVE_SPACE(8); /* eof flag and byte count */
2428 maxcount = svc_max_payload(resp->rqstp);
2429 if (maxcount > read->rd_length)
2430 maxcount = read->rd_length;
2435 pn = resp->rqstp->rq_resused++;
2436 resp->rqstp->rq_vec[v].iov_base =
2437 page_address(resp->rqstp->rq_respages[pn]);
2438 resp->rqstp->rq_vec[v].iov_len =
2439 len < PAGE_SIZE ? len : PAGE_SIZE;
2445 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2446 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2449 if (nfserr == nfserr_symlink)
2450 nfserr = nfserr_inval;
2453 eof = (read->rd_offset + maxcount >=
2454 read->rd_fhp->fh_dentry->d_inode->i_size);
2459 resp->xbuf->head[0].iov_len = (char*)p
2460 - (char*)resp->xbuf->head[0].iov_base;
2461 resp->xbuf->page_len = maxcount;
2463 /* Use rest of head for padding and remaining ops: */
2464 resp->xbuf->tail[0].iov_base = p;
2465 resp->xbuf->tail[0].iov_len = 0;
2469 resp->xbuf->tail[0].iov_base += maxcount&3;
2470 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2477 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2485 if (resp->xbuf->page_len)
2486 return nfserr_resource;
2488 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2490 maxcount = PAGE_SIZE;
2494 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2495 * if they would overflow the buffer. Is this kosher in NFSv4? If
2496 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2497 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2499 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2500 if (nfserr == nfserr_isdir)
2501 return nfserr_inval;
2507 resp->xbuf->head[0].iov_len = (char*)p
2508 - (char*)resp->xbuf->head[0].iov_base;
2509 resp->xbuf->page_len = maxcount;
2511 /* Use rest of head for padding and remaining ops: */
2512 resp->xbuf->tail[0].iov_base = p;
2513 resp->xbuf->tail[0].iov_len = 0;
2517 resp->xbuf->tail[0].iov_base += maxcount&3;
2518 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2525 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2529 __be32 *page, *savep, *tailbase;
2534 if (resp->xbuf->page_len)
2535 return nfserr_resource;
2537 RESERVE_SPACE(8); /* verifier */
2540 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2544 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2547 maxcount = PAGE_SIZE;
2548 if (maxcount > readdir->rd_maxcount)
2549 maxcount = readdir->rd_maxcount;
2552 * Convert from bytes to words, account for the two words already
2553 * written, make sure to leave two words at the end for the next
2554 * pointer and eof field.
2556 maxcount = (maxcount >> 2) - 4;
2558 nfserr = nfserr_toosmall;
2562 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2563 readdir->common.err = 0;
2564 readdir->buflen = maxcount;
2565 readdir->buffer = page;
2566 readdir->offset = NULL;
2568 offset = readdir->rd_cookie;
2569 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2571 &readdir->common, nfsd4_encode_dirent);
2572 if (nfserr == nfs_ok &&
2573 readdir->common.err == nfserr_toosmall &&
2574 readdir->buffer == page)
2575 nfserr = nfserr_toosmall;
2576 if (nfserr == nfserr_symlink)
2577 nfserr = nfserr_notdir;
2581 if (readdir->offset)
2582 xdr_encode_hyper(readdir->offset, offset);
2584 p = readdir->buffer;
2585 *p++ = 0; /* no more entries */
2586 *p++ = htonl(readdir->common.err == nfserr_eof);
2587 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2588 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2590 /* Use rest of head for padding and remaining ops: */
2591 resp->xbuf->tail[0].iov_base = tailbase;
2592 resp->xbuf->tail[0].iov_len = 0;
2593 resp->p = resp->xbuf->tail[0].iov_base;
2594 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2604 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2610 WRITECINFO(remove->rm_cinfo);
2617 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2623 WRITECINFO(rename->rn_sinfo);
2624 WRITECINFO(rename->rn_tinfo);
2631 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2632 struct nfsd4_secinfo *secinfo)
2635 struct svc_export *exp = secinfo->si_exp;
2637 struct exp_flavor_info *flavs;
2638 struct exp_flavor_info def_flavs[2];
2643 if (exp->ex_nflavors) {
2644 flavs = exp->ex_flavors;
2645 nflavs = exp->ex_nflavors;
2646 } else { /* Handling of some defaults in absence of real secinfo: */
2648 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2650 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2651 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2652 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2654 flavs[0].pseudoflavor
2655 = svcauth_gss_flavor(exp->ex_client);
2658 flavs[0].pseudoflavor
2659 = exp->ex_client->flavour->flavour;
2666 for (i = 0; i < nflavs; i++) {
2667 u32 flav = flavs[i].pseudoflavor;
2668 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2672 WRITE32(RPC_AUTH_GSS);
2674 RESERVE_SPACE(4 + gm->gm_oid.len);
2675 WRITE32(gm->gm_oid.len);
2676 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2679 WRITE32(0); /* qop */
2682 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2698 * The SETATTR encode routine is special -- it always encodes a bitmap,
2699 * regardless of the error status.
2702 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2714 WRITE32(setattr->sa_bmval[0]);
2715 WRITE32(setattr->sa_bmval[1]);
2722 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2727 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2728 WRITEMEM(&scd->se_clientid, 8);
2729 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2732 else if (nfserr == nfserr_clid_inuse) {
2742 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2748 WRITE32(write->wr_bytes_written);
2749 WRITE32(write->wr_how_written);
2750 WRITEMEM(write->wr_verifier.data, 8);
2757 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2758 struct nfsd4_exchange_id *exid)
2764 int server_scope_sz;
2765 uint64_t minor_id = 0;
2770 major_id = utsname()->nodename;
2771 major_id_sz = strlen(major_id);
2772 server_scope = utsname()->nodename;
2773 server_scope_sz = strlen(server_scope);
2776 8 /* eir_clientid */ +
2777 4 /* eir_sequenceid */ +
2779 4 /* spr_how (SP4_NONE) */ +
2780 8 /* so_minor_id */ +
2781 4 /* so_major_id.len */ +
2782 (XDR_QUADLEN(major_id_sz) * 4) +
2783 4 /* eir_server_scope.len */ +
2784 (XDR_QUADLEN(server_scope_sz) * 4) +
2785 4 /* eir_server_impl_id.count (0) */);
2787 WRITEMEM(&exid->clientid, 8);
2788 WRITE32(exid->seqid);
2789 WRITE32(exid->flags);
2791 /* state_protect4_r. Currently only support SP4_NONE */
2792 BUG_ON(exid->spa_how != SP4_NONE);
2793 WRITE32(exid->spa_how);
2795 /* The server_owner struct */
2796 WRITE64(minor_id); /* Minor id */
2798 WRITE32(major_id_sz);
2799 WRITEMEM(major_id, major_id_sz);
2802 WRITE32(server_scope_sz);
2803 WRITEMEM(server_scope, server_scope_sz);
2805 /* Implementation id */
2806 WRITE32(0); /* zero length nfs_impl_id4 array */
2812 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2813 struct nfsd4_create_session *sess)
2820 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2821 struct nfsd4_destroy_session *destroy_session)
2828 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2829 struct nfsd4_sequence *seq)
2836 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
2841 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
2844 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
2845 * since we don't need to filter out obsolete ops as this is
2846 * done in the decoding phase.
2848 static nfsd4_enc nfsd4_enc_ops[] = {
2849 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
2850 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
2851 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
2852 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
2853 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
2854 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2855 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
2856 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
2857 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
2858 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
2859 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
2860 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
2861 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
2862 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
2863 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2864 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
2865 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
2866 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
2867 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
2868 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
2869 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
2870 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
2871 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
2872 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
2873 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
2874 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
2875 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
2876 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
2877 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
2878 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
2879 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
2880 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
2881 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
2882 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
2883 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
2884 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
2885 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
2887 /* NFSv4.1 operations */
2888 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
2889 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
2890 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
2891 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
2892 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
2893 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2894 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
2895 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
2896 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
2897 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
2898 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
2899 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
2900 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
2901 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
2902 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
2903 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
2904 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
2905 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
2906 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
2910 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2917 statp = p++; /* to be backfilled at the end */
2920 if (op->opnum == OP_ILLEGAL)
2922 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
2923 !nfsd4_enc_ops[op->opnum]);
2924 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
2927 * Note: We write the status directly, instead of using WRITE32(),
2928 * since it is already in network byte order.
2930 *statp = op->status;
2934 * Encode the reply stored in the stateowner reply cache
2936 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2937 * previously sent already encoded operation.
2939 * called with nfs4_lock_state() held
2942 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2945 struct nfs4_replay *rp = op->replay;
2951 *p++ = rp->rp_status; /* already xdr'ed */
2954 RESERVE_SPACE(rp->rp_buflen);
2955 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2960 * END OF "GENERIC" ENCODE ROUTINES.
2964 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
2966 return xdr_ressize_check(rqstp, p);
2969 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2971 if (args->ops != args->iops) {
2973 args->ops = args->iops;
2977 while (args->to_free) {
2978 struct tmpbuf *tb = args->to_free;
2979 args->to_free = tb->next;
2980 tb->release(tb->buf);
2986 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
2991 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2992 args->pagelist = rqstp->rq_arg.pages;
2993 args->pagelen = rqstp->rq_arg.page_len;
2995 args->to_free = NULL;
2996 args->ops = args->iops;
2997 args->rqstp = rqstp;
2999 status = nfsd4_decode_compound(args);
3001 nfsd4_release_compoundargs(args);
3007 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3010 * All that remains is to write the tag and operation count...
3014 *p++ = htonl(resp->taglen);
3015 memcpy(p, resp->tag, resp->taglen);
3016 p += XDR_QUADLEN(resp->taglen);
3017 *p++ = htonl(resp->opcnt);
3019 if (rqstp->rq_res.page_len)
3020 iov = &rqstp->rq_res.tail[0];
3022 iov = &rqstp->rq_res.head[0];
3023 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3024 BUG_ON(iov->iov_len > PAGE_SIZE);