2 * Server-side XDR for NFSv4
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
43 #include <linux/param.h>
44 #include <linux/smp.h>
46 #include <linux/namei.h>
47 #include <linux/vfs.h>
48 #include <linux/utsname.h>
49 #include <linux/sunrpc/xdr.h>
50 #include <linux/sunrpc/svc.h>
51 #include <linux/sunrpc/clnt.h>
52 #include <linux/nfsd/nfsd.h>
53 #include <linux/nfsd/state.h>
54 #include <linux/nfsd/xdr4.h>
55 #include <linux/nfsd_idmap.h>
56 #include <linux/nfs4.h>
57 #include <linux/nfs4_acl.h>
58 #include <linux/sunrpc/gss_api.h>
59 #include <linux/sunrpc/svcauth_gss.h>
61 #define NFSDDBG_FACILITY NFSDDBG_XDR
64 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
65 * directory in order to indicate to the client that a filesystem boundary is present
66 * We use a fixed fsid for a referral
68 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
69 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
72 check_filename(char *str, int len, __be32 err)
78 if (isdotent(str, len))
80 for (i = 0; i < len; i++)
87 * START OF "GENERIC" DECODE ROUTINES.
88 * These may look a little ugly since they are imported from a "generic"
89 * set of XDR encode/decode routines which are intended to be shared by
90 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
92 * If the pain of reading these is too great, it should be a straightforward
93 * task to translate them into Linux-specific versions which are more
94 * consistent with the style used in NFSv2/v3...
104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
106 status = nfserr_bad_xdr; \
109 #define READ32(x) (x) = ntohl(*p++)
110 #define READ64(x) do { \
111 (x) = (u64)ntohl(*p++) << 32; \
112 (x) |= ntohl(*p++); \
114 #define READTIME(x) do { \
119 #define READMEM(x,nbytes) do { \
121 p += XDR_QUADLEN(nbytes); \
123 #define SAVEMEM(x,nbytes) do { \
124 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
125 savemem(argp, p, nbytes) : \
127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
131 p += XDR_QUADLEN(nbytes); \
133 #define COPYMEM(x,nbytes) do { \
134 memcpy((x), p, nbytes); \
135 p += XDR_QUADLEN(nbytes); \
138 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
139 #define READ_BUF(nbytes) do { \
140 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
142 argp->p += XDR_QUADLEN(nbytes); \
143 } else if (!(p = read_buf(argp, nbytes))) { \
144 dprintk("NFSD: xdr error (%s:%d)\n", \
145 __FILE__, __LINE__); \
150 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
155 unsigned int avail = (char *)argp->end - (char *)argp->p;
157 if (avail + argp->pagelen < nbytes)
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
176 memcpy(p, argp->p, avail);
177 /* step to next page */
178 argp->p = page_address(argp->pagelist[0]);
180 if (argp->pagelen < PAGE_SIZE) {
181 argp->end = p + (argp->pagelen>>2);
184 argp->end = p + (PAGE_SIZE>>2);
185 argp->pagelen -= PAGE_SIZE;
187 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
188 argp->p += XDR_QUADLEN(nbytes - avail);
192 static int zero_clientid(clientid_t *clid)
194 return (clid->cl_boot == 0) && (clid->cl_id == 0);
198 defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
207 tb->release = release;
208 tb->next = argp->to_free;
213 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
215 if (p == argp->tmp) {
216 p = kmalloc(nbytes, GFP_KERNEL);
219 memcpy(p, argp->tmp, nbytes);
221 BUG_ON(p != argp->tmpp);
224 if (defer_free(argp, kfree, p)) {
232 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
246 READ_BUF(bmlen << 2);
257 static u32 nfsd_attrmask[] = {
258 NFSD_WRITEABLE_ATTRS_WORD0,
259 NFSD_WRITEABLE_ATTRS_WORD1,
260 NFSD_WRITEABLE_ATTRS_WORD2
263 static u32 nfsd41_ex_attrmask[] = {
264 NFSD_SUPPATTR_EXCLCREAT_WORD0,
265 NFSD_SUPPATTR_EXCLCREAT_WORD1,
266 NFSD_SUPPATTR_EXCLCREAT_WORD2
270 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, u32 *writable,
271 struct iattr *iattr, struct nfs4_acl **acl)
273 int expected_len, len = 0;
280 if ((status = nfsd4_decode_bitmap(argp, bmval)))
284 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
285 * read-only attributes return ERR_INVAL.
287 if ((bmval[0] & ~nfsd_suppattrs0(argp->minorversion)) ||
288 (bmval[1] & ~nfsd_suppattrs1(argp->minorversion)) ||
289 (bmval[2] & ~nfsd_suppattrs2(argp->minorversion)))
290 return nfserr_attrnotsupp;
291 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
292 (bmval[2] & ~writable[2]))
296 READ32(expected_len);
298 if (bmval[0] & FATTR4_WORD0_SIZE) {
301 READ64(iattr->ia_size);
302 iattr->ia_valid |= ATTR_SIZE;
304 if (bmval[0] & FATTR4_WORD0_ACL) {
306 struct nfs4_ace *ace;
308 READ_BUF(4); len += 4;
311 if (nace > NFS4_ACL_MAX)
312 return nfserr_resource;
314 *acl = nfs4_acl_new(nace);
319 defer_free(argp, kfree, *acl);
321 (*acl)->naces = nace;
322 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
323 READ_BUF(16); len += 16;
326 READ32(ace->access_mask);
329 len += XDR_QUADLEN(dummy32) << 2;
330 READMEM(buf, dummy32);
331 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
333 if (ace->whotype != NFS4_ACL_WHO_NAMED)
335 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
336 host_err = nfsd_map_name_to_gid(argp->rqstp,
337 buf, dummy32, &ace->who);
339 host_err = nfsd_map_name_to_uid(argp->rqstp,
340 buf, dummy32, &ace->who);
346 if (bmval[1] & FATTR4_WORD1_MODE) {
349 READ32(iattr->ia_mode);
350 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
351 iattr->ia_valid |= ATTR_MODE;
353 if (bmval[1] & FATTR4_WORD1_OWNER) {
358 len += (XDR_QUADLEN(dummy32) << 2);
359 READMEM(buf, dummy32);
360 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
362 iattr->ia_valid |= ATTR_UID;
364 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
369 len += (XDR_QUADLEN(dummy32) << 2);
370 READMEM(buf, dummy32);
371 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
373 iattr->ia_valid |= ATTR_GID;
375 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
380 case NFS4_SET_TO_CLIENT_TIME:
381 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
382 all 32 bits of 'nseconds'. */
388 READ32(iattr->ia_atime.tv_sec);
389 READ32(iattr->ia_atime.tv_nsec);
390 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
392 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
394 case NFS4_SET_TO_SERVER_TIME:
395 iattr->ia_valid |= ATTR_ATIME;
401 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
406 case NFS4_SET_TO_CLIENT_TIME:
407 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
408 all 32 bits of 'nseconds'. */
414 READ32(iattr->ia_mtime.tv_sec);
415 READ32(iattr->ia_mtime.tv_nsec);
416 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
418 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
420 case NFS4_SET_TO_SERVER_TIME:
421 iattr->ia_valid |= ATTR_MTIME;
427 BUG_ON(bmval[2]); /* no such writeable attr supported yet */
428 if (len != expected_len)
434 status = nfserrno(host_err);
439 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
443 READ_BUF(sizeof(stateid_t));
444 READ32(sid->si_generation);
445 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
451 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456 READ32(access->ac_req_access);
462 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
466 close->cl_stateowner = NULL;
468 READ32(close->cl_seqid);
469 return nfsd4_decode_stateid(argp, &close->cl_stateid);
476 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
481 READ64(commit->co_offset);
482 READ32(commit->co_count);
488 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
493 READ32(create->cr_type);
494 switch (create->cr_type) {
497 READ32(create->cr_linklen);
498 READ_BUF(create->cr_linklen);
499 SAVEMEM(create->cr_linkname, create->cr_linklen);
504 READ32(create->cr_specdata1);
505 READ32(create->cr_specdata2);
515 READ32(create->cr_namelen);
516 READ_BUF(create->cr_namelen);
517 SAVEMEM(create->cr_name, create->cr_namelen);
518 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
521 status = nfsd4_decode_fattr(argp, create->cr_bmval, nfsd_attrmask,
522 &create->cr_iattr, &create->cr_acl);
530 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
532 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
536 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
538 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
542 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
547 READ32(link->li_namelen);
548 READ_BUF(link->li_namelen);
549 SAVEMEM(link->li_name, link->li_namelen);
550 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
557 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
561 lock->lk_replay_owner = NULL;
563 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
566 READ32(lock->lk_type);
567 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
569 READ32(lock->lk_reclaim);
570 READ64(lock->lk_offset);
571 READ64(lock->lk_length);
572 READ32(lock->lk_is_new);
574 if (lock->lk_is_new) {
576 READ32(lock->lk_new_open_seqid);
577 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
580 READ_BUF(8 + sizeof(clientid_t));
581 READ32(lock->lk_new_lock_seqid);
582 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
583 READ32(lock->lk_new_owner.len);
584 READ_BUF(lock->lk_new_owner.len);
585 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
587 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
591 READ32(lock->lk_old_lock_seqid);
598 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
603 READ32(lockt->lt_type);
604 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
606 READ64(lockt->lt_offset);
607 READ64(lockt->lt_length);
608 COPYMEM(&lockt->lt_clientid, 8);
609 READ32(lockt->lt_owner.len);
610 READ_BUF(lockt->lt_owner.len);
611 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
613 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
619 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
623 locku->lu_stateowner = NULL;
625 READ32(locku->lu_type);
626 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
628 READ32(locku->lu_seqid);
629 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
633 READ64(locku->lu_offset);
634 READ64(locku->lu_length);
640 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
645 READ32(lookup->lo_len);
646 READ_BUF(lookup->lo_len);
647 SAVEMEM(lookup->lo_name, lookup->lo_len);
648 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
655 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
659 memset(open->op_bmval, 0, sizeof(open->op_bmval));
660 open->op_iattr.ia_valid = 0;
661 open->op_stateowner = NULL;
663 /* seqid, share_access, share_deny, clientid, ownerlen */
664 READ_BUF(16 + sizeof(clientid_t));
665 READ32(open->op_seqid);
666 READ32(open->op_share_access);
667 READ32(open->op_share_deny);
668 COPYMEM(&open->op_clientid, sizeof(clientid_t));
669 READ32(open->op_owner.len);
671 /* owner, open_flag */
672 READ_BUF(open->op_owner.len + 4);
673 SAVEMEM(open->op_owner.data, open->op_owner.len);
674 READ32(open->op_create);
675 switch (open->op_create) {
676 case NFS4_OPEN_NOCREATE:
678 case NFS4_OPEN_CREATE:
680 READ32(open->op_createmode);
681 switch (open->op_createmode) {
682 case NFS4_CREATE_UNCHECKED:
683 case NFS4_CREATE_GUARDED:
684 status = nfsd4_decode_fattr(argp, open->op_bmval,
685 nfsd_attrmask, &open->op_iattr, &open->op_acl);
689 case NFS4_CREATE_EXCLUSIVE:
691 COPYMEM(open->op_verf.data, 8);
693 case NFS4_CREATE_EXCLUSIVE4_1:
694 if (argp->minorversion < 1)
697 COPYMEM(open->op_verf.data, 8);
698 status = nfsd4_decode_fattr(argp, open->op_bmval,
699 nfsd41_ex_attrmask, &open->op_iattr,
714 READ32(open->op_claim_type);
715 switch (open->op_claim_type) {
716 case NFS4_OPEN_CLAIM_NULL:
717 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
719 READ32(open->op_fname.len);
720 READ_BUF(open->op_fname.len);
721 SAVEMEM(open->op_fname.data, open->op_fname.len);
722 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
725 case NFS4_OPEN_CLAIM_PREVIOUS:
727 READ32(open->op_delegate_type);
729 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
730 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
734 READ32(open->op_fname.len);
735 READ_BUF(open->op_fname.len);
736 SAVEMEM(open->op_fname.data, open->op_fname.len);
737 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
748 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
752 open_conf->oc_stateowner = NULL;
753 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
757 READ32(open_conf->oc_seqid);
763 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
767 open_down->od_stateowner = NULL;
768 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
772 READ32(open_down->od_seqid);
773 READ32(open_down->od_share_access);
774 READ32(open_down->od_share_deny);
780 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
785 READ32(putfh->pf_fhlen);
786 if (putfh->pf_fhlen > NFS4_FHSIZE)
788 READ_BUF(putfh->pf_fhlen);
789 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
795 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
799 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
803 READ64(read->rd_offset);
804 READ32(read->rd_length);
810 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
815 READ64(readdir->rd_cookie);
816 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
817 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
818 READ32(readdir->rd_maxcount);
819 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
826 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
831 READ32(remove->rm_namelen);
832 READ_BUF(remove->rm_namelen);
833 SAVEMEM(remove->rm_name, remove->rm_namelen);
834 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
841 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
846 READ32(rename->rn_snamelen);
847 READ_BUF(rename->rn_snamelen + 4);
848 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
849 READ32(rename->rn_tnamelen);
850 READ_BUF(rename->rn_tnamelen);
851 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
852 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
854 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
861 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
865 READ_BUF(sizeof(clientid_t));
866 COPYMEM(clientid, sizeof(clientid_t));
872 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
873 struct nfsd4_secinfo *secinfo)
878 READ32(secinfo->si_namelen);
879 READ_BUF(secinfo->si_namelen);
880 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
881 status = check_filename(secinfo->si_name, secinfo->si_namelen,
889 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
893 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
896 return nfsd4_decode_fattr(argp, setattr->sa_bmval, nfsd_attrmask,
897 &setattr->sa_iattr, &setattr->sa_acl);
901 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
906 COPYMEM(setclientid->se_verf.data, 8);
907 READ32(setclientid->se_namelen);
909 READ_BUF(setclientid->se_namelen + 8);
910 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
911 READ32(setclientid->se_callback_prog);
912 READ32(setclientid->se_callback_netid_len);
914 READ_BUF(setclientid->se_callback_netid_len + 4);
915 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
916 READ32(setclientid->se_callback_addr_len);
918 READ_BUF(setclientid->se_callback_addr_len + 4);
919 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
920 READ32(setclientid->se_callback_ident);
926 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
930 READ_BUF(8 + sizeof(nfs4_verifier));
931 COPYMEM(&scd_c->sc_clientid, 8);
932 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
937 /* Also used for NVERIFY */
939 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
942 struct nfsd4_compoundargs save = {
945 .rqstp = argp->rqstp,
948 struct iattr ve_iattr; /* request */
949 struct nfs4_acl *ve_acl; /* request */
953 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
956 /* For convenience's sake, we compare raw xdr'd attributes in
957 * nfsd4_proc_verify; however we still decode here just to return
958 * correct error in case of bad xdr. */
960 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
961 if (status == nfserr_inval) {
962 status = nfserrno(status);
967 READ32(verify->ve_attrlen);
968 READ_BUF(verify->ve_attrlen);
969 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
975 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
982 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
986 READ64(write->wr_offset);
987 READ32(write->wr_stable_how);
988 if (write->wr_stable_how > 2)
990 READ32(write->wr_buflen);
992 /* Sorry .. no magic macros for this.. *
993 * READ_BUF(write->wr_buflen);
994 * SAVEMEM(write->wr_buf, write->wr_buflen);
996 avail = (char*)argp->end - (char*)argp->p;
997 if (avail + argp->pagelen < write->wr_buflen) {
998 dprintk("NFSD: xdr error (%s:%d)\n",
1002 argp->rqstp->rq_vec[0].iov_base = p;
1003 argp->rqstp->rq_vec[0].iov_len = avail;
1005 len = write->wr_buflen;
1006 while (len > argp->rqstp->rq_vec[v].iov_len) {
1007 len -= argp->rqstp->rq_vec[v].iov_len;
1009 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1011 if (argp->pagelen >= PAGE_SIZE) {
1012 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1013 argp->pagelen -= PAGE_SIZE;
1015 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1016 argp->pagelen -= len;
1019 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1020 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1021 argp->rqstp->rq_vec[v].iov_len = len;
1022 write->wr_vlen = v+1;
1028 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1033 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1034 READ32(rlockowner->rl_owner.len);
1035 READ_BUF(rlockowner->rl_owner.len);
1036 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1038 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1039 return nfserr_inval;
1044 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1045 struct nfsd4_exchange_id *exid)
1050 READ_BUF(NFS4_VERIFIER_SIZE);
1051 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1054 READ32(exid->clname.len);
1056 READ_BUF(exid->clname.len);
1057 SAVEMEM(exid->clname.data, exid->clname.len);
1060 READ32(exid->flags);
1062 /* Ignore state_protect4_a */
1064 READ32(exid->spa_how);
1065 switch (exid->spa_how) {
1069 /* spo_must_enforce */
1072 READ_BUF(dummy * 4);
1075 /* spo_must_allow */
1078 READ_BUF(dummy * 4);
1085 READ_BUF(dummy * 4);
1090 READ_BUF(dummy * 4);
1093 /* ssp_hash_algs<> */
1097 p += XDR_QUADLEN(dummy);
1099 /* ssp_encr_algs<> */
1103 p += XDR_QUADLEN(dummy);
1105 /* ssp_window and ssp_num_gss_handles */
1114 /* Ignore Implementation ID */
1115 READ_BUF(4); /* nfs_impl_id4 array length */
1126 p += XDR_QUADLEN(dummy);
1132 p += XDR_QUADLEN(dummy);
1142 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1143 struct nfsd4_create_session *sess)
1153 COPYMEM(&sess->clientid, 8);
1154 READ32(sess->seqid);
1155 READ32(sess->flags);
1157 /* Fore channel attrs */
1159 READ32(dummy); /* headerpadsz is always 0 */
1160 READ32(sess->fore_channel.maxreq_sz);
1161 READ32(sess->fore_channel.maxresp_sz);
1162 READ32(sess->fore_channel.maxresp_cached);
1163 READ32(sess->fore_channel.maxops);
1164 READ32(sess->fore_channel.maxreqs);
1165 READ32(sess->fore_channel.nr_rdma_attrs);
1166 if (sess->fore_channel.nr_rdma_attrs == 1) {
1168 READ32(sess->fore_channel.rdma_attrs);
1169 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1170 dprintk("Too many fore channel attr bitmaps!\n");
1174 /* Back channel attrs */
1176 READ32(dummy); /* headerpadsz is always 0 */
1177 READ32(sess->back_channel.maxreq_sz);
1178 READ32(sess->back_channel.maxresp_sz);
1179 READ32(sess->back_channel.maxresp_cached);
1180 READ32(sess->back_channel.maxops);
1181 READ32(sess->back_channel.maxreqs);
1182 READ32(sess->back_channel.nr_rdma_attrs);
1183 if (sess->back_channel.nr_rdma_attrs == 1) {
1185 READ32(sess->back_channel.rdma_attrs);
1186 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1187 dprintk("Too many back channel attr bitmaps!\n");
1192 READ32(sess->callback_prog);
1194 /* callback_sec_params4 */
1195 READ32(nr_secflavs);
1196 for (i = 0; i < nr_secflavs; ++i) {
1201 /* Nothing to read */
1211 SAVEMEM(machine_name, dummy);
1221 READ_BUF(dummy * 4);
1222 for (i = 0; i < dummy; ++i)
1226 dprintk("RPC_AUTH_GSS callback secflavor "
1227 "not supported!\n");
1231 /* gcbp_handle_from_server */
1234 p += XDR_QUADLEN(dummy);
1235 /* gcbp_handle_from_client */
1239 p += XDR_QUADLEN(dummy);
1242 dprintk("Illegal callback secflavor\n");
1243 return nfserr_inval;
1250 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1251 struct nfsd4_destroy_session *destroy_session)
1254 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1255 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1261 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1262 struct nfsd4_sequence *seq)
1266 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1267 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1269 READ32(seq->slotid);
1270 READ32(seq->maxslots);
1271 READ32(seq->cachethis);
1277 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1283 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1285 return nfserr_notsupp;
1288 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1290 static nfsd4_dec nfsd4_dec_ops[] = {
1291 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1292 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1293 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1294 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1295 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1296 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1297 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1298 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1299 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1300 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1301 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1302 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1303 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1304 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1305 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1306 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1307 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1308 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1309 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1310 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1311 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1312 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1313 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1314 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1315 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1316 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1317 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1318 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1319 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1320 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1321 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1322 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1323 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1324 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1325 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1326 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1327 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1330 static nfsd4_dec nfsd41_dec_ops[] = {
1331 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1332 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1333 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1334 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1335 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1336 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1337 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1338 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1339 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1340 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1341 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1342 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1343 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1344 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1345 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1346 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1347 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1350 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1351 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1352 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1353 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1354 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1355 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1356 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1357 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1358 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1359 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1360 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1361 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1362 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1363 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1364 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1365 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1366 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1367 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1369 /* new operations for NFSv4.1 */
1370 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1372 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1373 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1374 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1375 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1376 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1377 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1378 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1379 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1380 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1381 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1382 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1383 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1384 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1385 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1386 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1387 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1388 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1391 struct nfsd4_minorversion_ops {
1392 nfsd4_dec *decoders;
1396 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1397 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1398 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1402 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1405 struct nfsd4_op *op;
1406 struct nfsd4_minorversion_ops *ops;
1410 * XXX: According to spec, we should check the tag
1411 * for UTF-8 compliance. I'm postponing this for
1412 * now because it seems that some clients do use
1416 READ32(argp->taglen);
1417 READ_BUF(argp->taglen + 8);
1418 SAVEMEM(argp->tag, argp->taglen);
1419 READ32(argp->minorversion);
1420 READ32(argp->opcnt);
1422 if (argp->taglen > NFSD4_MAX_TAGLEN)
1424 if (argp->opcnt > 100)
1427 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1428 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1430 argp->ops = argp->iops;
1431 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1436 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1439 ops = &nfsd4_minorversion[argp->minorversion];
1440 for (i = 0; i < argp->opcnt; i++) {
1445 * We can't use READ_BUF() here because we need to handle
1446 * a missing opcode as an OP_WRITE + 1. So we need to check
1447 * to see if we're truly at the end of our buffer or if there
1448 * is another page we need to flip to.
1451 if (argp->p == argp->end) {
1452 if (argp->pagelen < 4) {
1453 /* There isn't an opcode still on the wire */
1454 op->opnum = OP_WRITE + 1;
1455 op->status = nfserr_bad_xdr;
1461 * False alarm. We just hit a page boundary, but there
1462 * is still data available. Move pointer across page
1463 * boundary. *snip from READ_BUF*
1465 argp->p = page_address(argp->pagelist[0]);
1467 if (argp->pagelen < PAGE_SIZE) {
1468 argp->end = p + (argp->pagelen>>2);
1471 argp->end = p + (PAGE_SIZE>>2);
1472 argp->pagelen -= PAGE_SIZE;
1475 op->opnum = ntohl(*argp->p++);
1477 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1478 op->status = ops->decoders[op->opnum](argp, &op->u);
1480 op->opnum = OP_ILLEGAL;
1481 op->status = nfserr_op_illegal;
1493 * END OF "GENERIC" DECODE ROUTINES.
1497 * START OF "GENERIC" ENCODE ROUTINES.
1498 * These may look a little ugly since they are imported from a "generic"
1499 * set of XDR encode/decode routines which are intended to be shared by
1500 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1502 * If the pain of reading these is too great, it should be a straightforward
1503 * task to translate them into Linux-specific versions which are more
1504 * consistent with the style used in NFSv2/v3...
1506 #define WRITE32(n) *p++ = htonl(n)
1507 #define WRITE64(n) do { \
1508 *p++ = htonl((u32)((n) >> 32)); \
1509 *p++ = htonl((u32)(n)); \
1511 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1512 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1513 memcpy(p, ptr, nbytes); \
1514 p += XDR_QUADLEN(nbytes); \
1516 #define WRITECINFO(c) do { \
1517 *p++ = htonl(c.atomic); \
1518 *p++ = htonl(c.before_ctime_sec); \
1519 *p++ = htonl(c.before_ctime_nsec); \
1520 *p++ = htonl(c.after_ctime_sec); \
1521 *p++ = htonl(c.after_ctime_nsec); \
1524 #define RESERVE_SPACE(nbytes) do { \
1526 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1528 #define ADJUST_ARGS() resp->p = p
1531 * Header routine to setup seqid operation replay cache
1533 #define ENCODE_SEQID_OP_HEAD \
1539 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1540 * is where sequence id's are incremented, and the replay cache is filled.
1541 * Note that we increment sequence id's here, at the last moment, so we're sure
1542 * we know whether the error to be returned is a sequence id mutating error.
1545 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1546 if (seqid_mutating_err(nfserr) && stateowner) { \
1547 stateowner->so_seqid++; \
1548 stateowner->so_replay.rp_status = nfserr; \
1549 stateowner->so_replay.rp_buflen = \
1550 (((char *)(resp)->p - (char *)save)); \
1551 memcpy(stateowner->so_replay.rp_buf, save, \
1552 stateowner->so_replay.rp_buflen); \
1555 /* Encode as an array of strings the string given with components
1558 static __be32 nfsd4_encode_components(char sep, char *components,
1559 __be32 **pp, int *buflen)
1563 int strlen, count=0;
1566 dprintk("nfsd4_encode_components(%s)\n", components);
1567 if ((*buflen -= 4) < 0)
1568 return nfserr_resource;
1569 WRITE32(0); /* We will fill this in with @count later */
1570 end = str = components;
1572 for (; *end && (*end != sep); end++)
1573 ; /* Point to end of component */
1576 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1577 return nfserr_resource;
1579 WRITEMEM(str, strlen);
1593 * encode a location element of a fs_locations structure
1595 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1596 __be32 **pp, int *buflen)
1601 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1604 status = nfsd4_encode_components('/', location->path, &p, buflen);
1612 * Return the path to an export point in the pseudo filesystem namespace
1613 * Returned string is safe to use as long as the caller holds a reference
1616 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1618 struct svc_fh tmp_fh;
1619 char *path, *rootpath;
1621 fh_init(&tmp_fh, NFS4_FHSIZE);
1622 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1625 rootpath = tmp_fh.fh_export->ex_pathname;
1627 path = exp->ex_pathname;
1629 if (strncmp(path, rootpath, strlen(rootpath))) {
1630 dprintk("nfsd: fs_locations failed;"
1631 "%s is not contained in %s\n", path, rootpath);
1632 *stat = nfserr_notsupp;
1636 return path + strlen(rootpath);
1640 * encode a fs_locations structure
1642 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1643 struct svc_export *exp,
1644 __be32 **pp, int *buflen)
1649 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1650 char *root = nfsd4_path(rqstp, exp, &status);
1654 status = nfsd4_encode_components('/', root, &p, buflen);
1657 if ((*buflen -= 4) < 0)
1658 return nfserr_resource;
1659 WRITE32(fslocs->locations_count);
1660 for (i=0; i<fslocs->locations_count; i++) {
1661 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1670 static u32 nfs4_ftypes[16] = {
1671 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1672 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1673 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1674 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1678 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1679 __be32 **p, int *buflen)
1683 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1684 return nfserr_resource;
1685 if (whotype != NFS4_ACL_WHO_NAMED)
1686 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1688 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1690 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1692 return nfserrno(status);
1693 *p = xdr_encode_opaque(*p, NULL, status);
1694 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1695 BUG_ON(*buflen < 0);
1699 static inline __be32
1700 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1702 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1705 static inline __be32
1706 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1708 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1711 static inline __be32
1712 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1713 __be32 **p, int *buflen)
1715 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1718 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1719 FATTR4_WORD0_RDATTR_ERROR)
1720 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1722 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1724 /* As per referral draft: */
1725 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1726 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1727 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1728 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1729 *rdattr_err = NFSERR_MOVED;
1731 return nfserr_moved;
1733 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1734 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1739 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1742 * @countp is the buffer size in _words_; upon successful return this becomes
1743 * replaced with the number of words written.
1746 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1747 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1748 struct svc_rqst *rqstp, int ignore_crossmnt)
1750 u32 bmval0 = bmval[0];
1751 u32 bmval1 = bmval[1];
1752 u32 bmval2 = bmval[2];
1754 struct svc_fh tempfh;
1755 struct kstatfs statfs;
1756 int buflen = *countp << 2;
1765 struct nfs4_acl *acl = NULL;
1766 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1767 u32 minorversion = resp->cstate.minorversion;
1769 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1770 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1771 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1772 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1774 if (exp->ex_fslocs.migrated) {
1776 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1781 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1784 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1785 FATTR4_WORD0_MAXNAME)) ||
1786 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1787 FATTR4_WORD1_SPACE_TOTAL))) {
1788 err = vfs_statfs(dentry, &statfs);
1792 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1793 fh_init(&tempfh, NFS4_FHSIZE);
1794 status = fh_compose(&tempfh, exp, dentry, NULL);
1799 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1800 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1801 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1802 aclsupport = (err == 0);
1803 if (bmval0 & FATTR4_WORD0_ACL) {
1804 if (err == -EOPNOTSUPP)
1805 bmval0 &= ~FATTR4_WORD0_ACL;
1806 else if (err == -EINVAL) {
1807 status = nfserr_attrnotsupp;
1809 } else if (err != 0)
1813 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1814 if (exp->ex_fslocs.locations == NULL) {
1815 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1818 if ((buflen -= 16) < 0)
1821 if (unlikely(bmval2)) {
1826 } else if (likely(bmval1)) {
1834 attrlenp = p++; /* to be backfilled later */
1836 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1837 u32 word0 = nfsd_suppattrs0(minorversion);
1838 u32 word1 = nfsd_suppattrs1(minorversion);
1839 u32 word2 = nfsd_suppattrs2(minorversion);
1841 if ((buflen -= 12) < 0)
1844 word0 &= ~FATTR4_WORD0_ACL;
1845 if (!exp->ex_fslocs.locations)
1846 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1858 if (bmval0 & FATTR4_WORD0_TYPE) {
1859 if ((buflen -= 4) < 0)
1861 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1862 if (dummy == NF4BAD)
1863 goto out_serverfault;
1866 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1867 if ((buflen -= 4) < 0)
1869 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1870 WRITE32(NFS4_FH_PERSISTENT);
1872 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1874 if (bmval0 & FATTR4_WORD0_CHANGE) {
1876 * Note: This _must_ be consistent with the scheme for writing
1877 * change_info, so any changes made here must be reflected there
1878 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1881 if ((buflen -= 8) < 0)
1883 WRITE32(stat.ctime.tv_sec);
1884 WRITE32(stat.ctime.tv_nsec);
1886 if (bmval0 & FATTR4_WORD0_SIZE) {
1887 if ((buflen -= 8) < 0)
1891 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1892 if ((buflen -= 4) < 0)
1896 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1897 if ((buflen -= 4) < 0)
1901 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1902 if ((buflen -= 4) < 0)
1906 if (bmval0 & FATTR4_WORD0_FSID) {
1907 if ((buflen -= 16) < 0)
1909 if (exp->ex_fslocs.migrated) {
1910 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1911 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1912 } else switch(fsid_source(fhp)) {
1913 case FSIDSOURCE_FSID:
1914 WRITE64((u64)exp->ex_fsid);
1917 case FSIDSOURCE_DEV:
1919 WRITE32(MAJOR(stat.dev));
1921 WRITE32(MINOR(stat.dev));
1923 case FSIDSOURCE_UUID:
1924 WRITEMEM(exp->ex_uuid, 16);
1928 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1929 if ((buflen -= 4) < 0)
1933 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1934 if ((buflen -= 4) < 0)
1936 WRITE32(NFSD_LEASE_TIME);
1938 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1939 if ((buflen -= 4) < 0)
1941 WRITE32(rdattr_err);
1943 if (bmval0 & FATTR4_WORD0_ACL) {
1944 struct nfs4_ace *ace;
1947 if ((buflen -= 4) < 0)
1953 if ((buflen -= 4) < 0)
1955 WRITE32(acl->naces);
1957 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1958 if ((buflen -= 4*3) < 0)
1962 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1963 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1964 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1966 if (status == nfserr_resource)
1973 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1974 if ((buflen -= 4) < 0)
1976 WRITE32(aclsupport ?
1977 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1979 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1980 if ((buflen -= 4) < 0)
1984 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1985 if ((buflen -= 4) < 0)
1989 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1990 if ((buflen -= 4) < 0)
1994 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1995 if ((buflen -= 4) < 0)
1999 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2000 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2003 WRITE32(fhp->fh_handle.fh_size);
2004 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2006 if (bmval0 & FATTR4_WORD0_FILEID) {
2007 if ((buflen -= 8) < 0)
2011 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2012 if ((buflen -= 8) < 0)
2014 WRITE64((u64) statfs.f_ffree);
2016 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2017 if ((buflen -= 8) < 0)
2019 WRITE64((u64) statfs.f_ffree);
2021 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2022 if ((buflen -= 8) < 0)
2024 WRITE64((u64) statfs.f_files);
2026 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2027 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2028 if (status == nfserr_resource)
2033 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2034 if ((buflen -= 4) < 0)
2038 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2039 if ((buflen -= 8) < 0)
2043 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2044 if ((buflen -= 4) < 0)
2048 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2049 if ((buflen -= 4) < 0)
2051 WRITE32(statfs.f_namelen);
2053 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2054 if ((buflen -= 8) < 0)
2056 WRITE64((u64) svc_max_payload(rqstp));
2058 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2059 if ((buflen -= 8) < 0)
2061 WRITE64((u64) svc_max_payload(rqstp));
2063 if (bmval1 & FATTR4_WORD1_MODE) {
2064 if ((buflen -= 4) < 0)
2066 WRITE32(stat.mode & S_IALLUGO);
2068 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2069 if ((buflen -= 4) < 0)
2073 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2074 if ((buflen -= 4) < 0)
2076 WRITE32(stat.nlink);
2078 if (bmval1 & FATTR4_WORD1_OWNER) {
2079 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2080 if (status == nfserr_resource)
2085 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2086 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2087 if (status == nfserr_resource)
2092 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2093 if ((buflen -= 8) < 0)
2095 WRITE32((u32) MAJOR(stat.rdev));
2096 WRITE32((u32) MINOR(stat.rdev));
2098 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2099 if ((buflen -= 8) < 0)
2101 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2104 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2105 if ((buflen -= 8) < 0)
2107 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2110 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2111 if ((buflen -= 8) < 0)
2113 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2116 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2117 if ((buflen -= 8) < 0)
2119 dummy64 = (u64)stat.blocks << 9;
2122 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2123 if ((buflen -= 12) < 0)
2126 WRITE32(stat.atime.tv_sec);
2127 WRITE32(stat.atime.tv_nsec);
2129 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2130 if ((buflen -= 12) < 0)
2136 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2137 if ((buflen -= 12) < 0)
2140 WRITE32(stat.ctime.tv_sec);
2141 WRITE32(stat.ctime.tv_nsec);
2143 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2144 if ((buflen -= 12) < 0)
2147 WRITE32(stat.mtime.tv_sec);
2148 WRITE32(stat.mtime.tv_nsec);
2150 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2151 if ((buflen -= 8) < 0)
2154 * Get parent's attributes if not ignoring crossmount
2155 * and this is the root of a cross-mounted filesystem.
2157 if (ignore_crossmnt == 0 &&
2158 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2159 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2160 exp->ex_path.mnt->mnt_mountpoint, &stat);
2166 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2168 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2169 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2170 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2173 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2174 *countp = p - buffer;
2183 status = nfserrno(err);
2187 status = nfserr_resource;
2190 status = nfserr_serverfault;
2194 static inline int attributes_need_mount(u32 *bmval)
2196 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2198 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2204 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2205 const char *name, int namlen, __be32 *p, int *buflen)
2207 struct svc_export *exp = cd->rd_fhp->fh_export;
2208 struct dentry *dentry;
2210 int ignore_crossmnt = 0;
2212 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2214 return nfserrno(PTR_ERR(dentry));
2218 * In the case of a mountpoint, the client may be asking for
2219 * attributes that are only properties of the underlying filesystem
2220 * as opposed to the cross-mounted file system. In such a case,
2221 * we will not follow the cross mount and will fill the attribtutes
2222 * directly from the mountpoint dentry.
2224 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2225 ignore_crossmnt = 1;
2226 else if (d_mountpoint(dentry)) {
2230 * Why the heck aren't we just using nfsd_lookup??
2231 * Different "."/".." handling? Something else?
2232 * At least, add a comment here to explain....
2234 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2236 nfserr = nfserrno(err);
2239 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2244 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2245 cd->rd_rqstp, ignore_crossmnt);
2253 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2260 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2261 *p++ = htonl(0); /* bmval1 */
2264 *p++ = nfserr; /* no htonl */
2265 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2270 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2271 loff_t offset, u64 ino, unsigned int d_type)
2273 struct readdir_cd *ccd = ccdv;
2274 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2276 __be32 *p = cd->buffer;
2277 __be32 nfserr = nfserr_toosmall;
2279 /* In nfsv4, "." and ".." never make it onto the wire.. */
2280 if (name && isdotent(name, namlen)) {
2281 cd->common.err = nfs_ok;
2286 xdr_encode_hyper(cd->offset, (u64) offset);
2288 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2292 *p++ = xdr_one; /* mark entry present */
2293 cd->offset = p; /* remember pointer */
2294 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2295 p = xdr_encode_array(p, name, namlen); /* name length & name */
2297 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2302 case nfserr_resource:
2303 nfserr = nfserr_toosmall;
2309 * If the client requested the RDATTR_ERROR attribute,
2310 * we stuff the error code into this attribute
2311 * and continue. If this attribute was not requested,
2312 * then in accordance with the spec, we fail the
2313 * entire READDIR operation(!)
2315 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2317 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2319 nfserr = nfserr_toosmall;
2323 cd->buflen -= (p - cd->buffer);
2325 cd->common.err = nfs_ok;
2328 cd->common.err = nfserr;
2333 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2337 RESERVE_SPACE(sizeof(stateid_t));
2338 WRITE32(sid->si_generation);
2339 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2344 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2350 WRITE32(access->ac_supported);
2351 WRITE32(access->ac_resp_access);
2358 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2360 ENCODE_SEQID_OP_HEAD;
2363 nfsd4_encode_stateid(resp, &close->cl_stateid);
2365 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2371 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2377 WRITEMEM(commit->co_verf.data, 8);
2384 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2390 WRITECINFO(create->cr_cinfo);
2392 WRITE32(create->cr_bmval[0]);
2393 WRITE32(create->cr_bmval[1]);
2400 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2402 struct svc_fh *fhp = getattr->ga_fhp;
2408 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2409 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2410 resp->p, &buflen, getattr->ga_bmval,
2418 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2420 struct svc_fh *fhp = *fhpp;
2425 len = fhp->fh_handle.fh_size;
2426 RESERVE_SPACE(len + 4);
2428 WRITEMEM(&fhp->fh_handle.fh_base, len);
2435 * Including all fields other than the name, a LOCK4denied structure requires
2436 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2439 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2443 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2444 WRITE64(ld->ld_start);
2445 WRITE64(ld->ld_length);
2446 WRITE32(ld->ld_type);
2448 WRITEMEM(&ld->ld_clientid, 8);
2449 WRITE32(ld->ld_sop->so_owner.len);
2450 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2451 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2452 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2453 WRITE64((u64)0); /* clientid */
2454 WRITE32(0); /* length of owner name */
2460 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2462 ENCODE_SEQID_OP_HEAD;
2465 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2466 else if (nfserr == nfserr_denied)
2467 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2469 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2474 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2476 if (nfserr == nfserr_denied)
2477 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2482 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2484 ENCODE_SEQID_OP_HEAD;
2487 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2489 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2495 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2501 WRITECINFO(link->li_cinfo);
2509 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2512 ENCODE_SEQID_OP_HEAD;
2517 nfsd4_encode_stateid(resp, &open->op_stateid);
2519 WRITECINFO(open->op_cinfo);
2520 WRITE32(open->op_rflags);
2522 WRITE32(open->op_bmval[0]);
2523 WRITE32(open->op_bmval[1]);
2524 WRITE32(open->op_delegate_type);
2527 switch (open->op_delegate_type) {
2528 case NFS4_OPEN_DELEGATE_NONE:
2530 case NFS4_OPEN_DELEGATE_READ:
2531 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2533 WRITE32(open->op_recall);
2536 * TODO: ACE's in delegations
2538 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2541 WRITE32(0); /* XXX: is NULL principal ok? */
2544 case NFS4_OPEN_DELEGATE_WRITE:
2545 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2550 * TODO: space_limit's in delegations
2552 WRITE32(NFS4_LIMIT_SIZE);
2557 * TODO: ACE's in delegations
2559 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2562 WRITE32(0); /* XXX: is NULL principal ok? */
2568 /* XXX save filehandle here */
2570 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2575 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2577 ENCODE_SEQID_OP_HEAD;
2580 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2582 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2587 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2589 ENCODE_SEQID_OP_HEAD;
2592 nfsd4_encode_stateid(resp, &od->od_stateid);
2594 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2599 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2600 struct nfsd4_read *read)
2604 unsigned long maxcount;
2610 if (resp->xbuf->page_len)
2611 return nfserr_resource;
2613 RESERVE_SPACE(8); /* eof flag and byte count */
2615 maxcount = svc_max_payload(resp->rqstp);
2616 if (maxcount > read->rd_length)
2617 maxcount = read->rd_length;
2622 pn = resp->rqstp->rq_resused++;
2623 resp->rqstp->rq_vec[v].iov_base =
2624 page_address(resp->rqstp->rq_respages[pn]);
2625 resp->rqstp->rq_vec[v].iov_len =
2626 len < PAGE_SIZE ? len : PAGE_SIZE;
2632 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2633 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2636 if (nfserr == nfserr_symlink)
2637 nfserr = nfserr_inval;
2640 eof = (read->rd_offset + maxcount >=
2641 read->rd_fhp->fh_dentry->d_inode->i_size);
2646 resp->xbuf->head[0].iov_len = (char*)p
2647 - (char*)resp->xbuf->head[0].iov_base;
2648 resp->xbuf->page_len = maxcount;
2650 /* Use rest of head for padding and remaining ops: */
2651 resp->xbuf->tail[0].iov_base = p;
2652 resp->xbuf->tail[0].iov_len = 0;
2656 resp->xbuf->tail[0].iov_base += maxcount&3;
2657 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2664 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2672 if (resp->xbuf->page_len)
2673 return nfserr_resource;
2675 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2677 maxcount = PAGE_SIZE;
2681 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2682 * if they would overflow the buffer. Is this kosher in NFSv4? If
2683 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2684 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2686 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2687 if (nfserr == nfserr_isdir)
2688 return nfserr_inval;
2694 resp->xbuf->head[0].iov_len = (char*)p
2695 - (char*)resp->xbuf->head[0].iov_base;
2696 resp->xbuf->page_len = maxcount;
2698 /* Use rest of head for padding and remaining ops: */
2699 resp->xbuf->tail[0].iov_base = p;
2700 resp->xbuf->tail[0].iov_len = 0;
2704 resp->xbuf->tail[0].iov_base += maxcount&3;
2705 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2712 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2716 __be32 *page, *savep, *tailbase;
2721 if (resp->xbuf->page_len)
2722 return nfserr_resource;
2724 RESERVE_SPACE(8); /* verifier */
2727 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2731 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2734 maxcount = PAGE_SIZE;
2735 if (maxcount > readdir->rd_maxcount)
2736 maxcount = readdir->rd_maxcount;
2739 * Convert from bytes to words, account for the two words already
2740 * written, make sure to leave two words at the end for the next
2741 * pointer and eof field.
2743 maxcount = (maxcount >> 2) - 4;
2745 nfserr = nfserr_toosmall;
2749 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2750 readdir->common.err = 0;
2751 readdir->buflen = maxcount;
2752 readdir->buffer = page;
2753 readdir->offset = NULL;
2755 offset = readdir->rd_cookie;
2756 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2758 &readdir->common, nfsd4_encode_dirent);
2759 if (nfserr == nfs_ok &&
2760 readdir->common.err == nfserr_toosmall &&
2761 readdir->buffer == page)
2762 nfserr = nfserr_toosmall;
2763 if (nfserr == nfserr_symlink)
2764 nfserr = nfserr_notdir;
2768 if (readdir->offset)
2769 xdr_encode_hyper(readdir->offset, offset);
2771 p = readdir->buffer;
2772 *p++ = 0; /* no more entries */
2773 *p++ = htonl(readdir->common.err == nfserr_eof);
2774 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2775 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2777 /* Use rest of head for padding and remaining ops: */
2778 resp->xbuf->tail[0].iov_base = tailbase;
2779 resp->xbuf->tail[0].iov_len = 0;
2780 resp->p = resp->xbuf->tail[0].iov_base;
2781 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2791 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2797 WRITECINFO(remove->rm_cinfo);
2804 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2810 WRITECINFO(rename->rn_sinfo);
2811 WRITECINFO(rename->rn_tinfo);
2818 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2819 struct nfsd4_secinfo *secinfo)
2822 struct svc_export *exp = secinfo->si_exp;
2824 struct exp_flavor_info *flavs;
2825 struct exp_flavor_info def_flavs[2];
2830 if (exp->ex_nflavors) {
2831 flavs = exp->ex_flavors;
2832 nflavs = exp->ex_nflavors;
2833 } else { /* Handling of some defaults in absence of real secinfo: */
2835 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2837 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2838 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2839 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2841 flavs[0].pseudoflavor
2842 = svcauth_gss_flavor(exp->ex_client);
2845 flavs[0].pseudoflavor
2846 = exp->ex_client->flavour->flavour;
2853 for (i = 0; i < nflavs; i++) {
2854 u32 flav = flavs[i].pseudoflavor;
2855 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2859 WRITE32(RPC_AUTH_GSS);
2861 RESERVE_SPACE(4 + gm->gm_oid.len);
2862 WRITE32(gm->gm_oid.len);
2863 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2866 WRITE32(0); /* qop */
2869 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2885 * The SETATTR encode routine is special -- it always encodes a bitmap,
2886 * regardless of the error status.
2889 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2901 WRITE32(setattr->sa_bmval[0]);
2902 WRITE32(setattr->sa_bmval[1]);
2909 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2914 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2915 WRITEMEM(&scd->se_clientid, 8);
2916 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2919 else if (nfserr == nfserr_clid_inuse) {
2929 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2935 WRITE32(write->wr_bytes_written);
2936 WRITE32(write->wr_how_written);
2937 WRITEMEM(write->wr_verifier.data, 8);
2944 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2945 struct nfsd4_exchange_id *exid)
2951 int server_scope_sz;
2952 uint64_t minor_id = 0;
2957 major_id = utsname()->nodename;
2958 major_id_sz = strlen(major_id);
2959 server_scope = utsname()->nodename;
2960 server_scope_sz = strlen(server_scope);
2963 8 /* eir_clientid */ +
2964 4 /* eir_sequenceid */ +
2966 4 /* spr_how (SP4_NONE) */ +
2967 8 /* so_minor_id */ +
2968 4 /* so_major_id.len */ +
2969 (XDR_QUADLEN(major_id_sz) * 4) +
2970 4 /* eir_server_scope.len */ +
2971 (XDR_QUADLEN(server_scope_sz) * 4) +
2972 4 /* eir_server_impl_id.count (0) */);
2974 WRITEMEM(&exid->clientid, 8);
2975 WRITE32(exid->seqid);
2976 WRITE32(exid->flags);
2978 /* state_protect4_r. Currently only support SP4_NONE */
2979 BUG_ON(exid->spa_how != SP4_NONE);
2980 WRITE32(exid->spa_how);
2982 /* The server_owner struct */
2983 WRITE64(minor_id); /* Minor id */
2985 WRITE32(major_id_sz);
2986 WRITEMEM(major_id, major_id_sz);
2989 WRITE32(server_scope_sz);
2990 WRITEMEM(server_scope, server_scope_sz);
2992 /* Implementation id */
2993 WRITE32(0); /* zero length nfs_impl_id4 array */
2999 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3000 struct nfsd4_create_session *sess)
3008 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3009 WRITE32(sess->seqid);
3010 WRITE32(sess->flags);
3014 WRITE32(0); /* headerpadsz */
3015 WRITE32(sess->fore_channel.maxreq_sz);
3016 WRITE32(sess->fore_channel.maxresp_sz);
3017 WRITE32(sess->fore_channel.maxresp_cached);
3018 WRITE32(sess->fore_channel.maxops);
3019 WRITE32(sess->fore_channel.maxreqs);
3020 WRITE32(sess->fore_channel.nr_rdma_attrs);
3023 if (sess->fore_channel.nr_rdma_attrs) {
3025 WRITE32(sess->fore_channel.rdma_attrs);
3030 WRITE32(0); /* headerpadsz */
3031 WRITE32(sess->back_channel.maxreq_sz);
3032 WRITE32(sess->back_channel.maxresp_sz);
3033 WRITE32(sess->back_channel.maxresp_cached);
3034 WRITE32(sess->back_channel.maxops);
3035 WRITE32(sess->back_channel.maxreqs);
3036 WRITE32(sess->back_channel.nr_rdma_attrs);
3039 if (sess->back_channel.nr_rdma_attrs) {
3041 WRITE32(sess->back_channel.rdma_attrs);
3048 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3049 struct nfsd4_destroy_session *destroy_session)
3055 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3056 struct nfsd4_sequence *seq)
3063 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3064 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3065 WRITE32(seq->seqid);
3066 WRITE32(seq->slotid);
3067 WRITE32(seq->maxslots);
3070 * target_maxslots = maxslots
3073 WRITE32(seq->maxslots);
3081 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3086 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3089 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3090 * since we don't need to filter out obsolete ops as this is
3091 * done in the decoding phase.
3093 static nfsd4_enc nfsd4_enc_ops[] = {
3094 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3095 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3096 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3097 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3098 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3099 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3100 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3101 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3102 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3103 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3104 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3105 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3106 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3107 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3108 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3109 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3110 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3111 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3112 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3113 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3114 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3115 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3116 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3117 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3118 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3119 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3120 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3121 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3122 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3123 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3124 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3125 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3126 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3127 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3128 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3129 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3130 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3132 /* NFSv4.1 operations */
3133 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3134 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3135 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3136 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3137 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3138 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3139 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3140 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3141 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3142 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3143 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3144 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3145 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3146 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3147 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3148 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3149 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3150 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3151 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3155 * Calculate the total amount of memory that the compound response has taken
3156 * after encoding the current operation.
3158 * pad: add on 8 bytes for the next operation's op_code and status so that
3159 * there is room to cache a failure on the next operation.
3161 * Compare this length to the session se_fmaxresp_cached.
3163 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3164 * will be at least a page and will therefore hold the xdr_buf head.
3166 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3169 struct xdr_buf *xb = &resp->rqstp->rq_res;
3170 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3171 struct nfsd4_session *session = NULL;
3172 struct nfsd4_slot *slot = resp->cstate.slot;
3173 u32 length, tlen = 0, pad = 8;
3175 if (!nfsd4_has_session(&resp->cstate))
3178 session = resp->cstate.session;
3179 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
3182 if (resp->opcnt >= args->opcnt)
3183 pad = 0; /* this is the last operation */
3185 if (xb->page_len == 0) {
3186 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3188 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3189 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3191 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3193 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3194 length, xb->page_len, tlen, pad);
3196 if (length <= session->se_fmaxresp_cached)
3199 return nfserr_rep_too_big_to_cache;
3203 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3210 statp = p++; /* to be backfilled at the end */
3213 if (op->opnum == OP_ILLEGAL)
3215 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3216 !nfsd4_enc_ops[op->opnum]);
3217 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3218 /* nfsd4_check_drc_limit guarantees enough room for error status */
3219 if (!op->status && nfsd4_check_drc_limit(resp))
3220 op->status = nfserr_rep_too_big_to_cache;
3223 * Note: We write the status directly, instead of using WRITE32(),
3224 * since it is already in network byte order.
3226 *statp = op->status;
3230 * Encode the reply stored in the stateowner reply cache
3232 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3233 * previously sent already encoded operation.
3235 * called with nfs4_lock_state() held
3238 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3241 struct nfs4_replay *rp = op->replay;
3247 *p++ = rp->rp_status; /* already xdr'ed */
3250 RESERVE_SPACE(rp->rp_buflen);
3251 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3256 * END OF "GENERIC" ENCODE ROUTINES.
3260 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3262 return xdr_ressize_check(rqstp, p);
3265 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3267 if (args->ops != args->iops) {
3269 args->ops = args->iops;
3273 while (args->to_free) {
3274 struct tmpbuf *tb = args->to_free;
3275 args->to_free = tb->next;
3276 tb->release(tb->buf);
3282 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3287 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3288 args->pagelist = rqstp->rq_arg.pages;
3289 args->pagelen = rqstp->rq_arg.page_len;
3291 args->to_free = NULL;
3292 args->ops = args->iops;
3293 args->rqstp = rqstp;
3295 status = nfsd4_decode_compound(args);
3297 nfsd4_release_compoundargs(args);
3303 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3306 * All that remains is to write the tag and operation count...
3310 *p++ = htonl(resp->taglen);
3311 memcpy(p, resp->tag, resp->taglen);
3312 p += XDR_QUADLEN(resp->taglen);
3313 *p++ = htonl(resp->opcnt);
3315 if (rqstp->rq_res.page_len)
3316 iov = &rqstp->rq_res.tail[0];
3318 iov = &rqstp->rq_res.head[0];
3319 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3320 BUG_ON(iov->iov_len > PAGE_SIZE);
3321 if (nfsd4_has_session(&resp->cstate)) {
3322 if (resp->cstate.status == nfserr_replay_cache &&
3323 !nfsd4_not_cached(resp)) {
3324 iov->iov_len = resp->cstate.iovlen;
3326 nfsd4_store_cache_entry(resp);
3327 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3328 resp->cstate.slot->sl_inuse = 0;
3330 if (resp->cstate.session)
3331 nfsd4_put_session(resp->cstate.session);