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)
245 READ_BUF(bmlen << 2);
255 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
256 struct nfs4_acl **acl)
258 int expected_len, len = 0;
265 if ((status = nfsd4_decode_bitmap(argp, bmval)))
269 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP;
270 * read-only attributes return ERR_INVAL.
272 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
273 return nfserr_attrnotsupp;
274 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
278 READ32(expected_len);
280 if (bmval[0] & FATTR4_WORD0_SIZE) {
283 READ64(iattr->ia_size);
284 iattr->ia_valid |= ATTR_SIZE;
286 if (bmval[0] & FATTR4_WORD0_ACL) {
288 struct nfs4_ace *ace;
290 READ_BUF(4); len += 4;
293 if (nace > NFS4_ACL_MAX)
294 return nfserr_resource;
296 *acl = nfs4_acl_new(nace);
301 defer_free(argp, kfree, *acl);
303 (*acl)->naces = nace;
304 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
305 READ_BUF(16); len += 16;
308 READ32(ace->access_mask);
311 len += XDR_QUADLEN(dummy32) << 2;
312 READMEM(buf, dummy32);
313 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
315 if (ace->whotype != NFS4_ACL_WHO_NAMED)
317 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
318 host_err = nfsd_map_name_to_gid(argp->rqstp,
319 buf, dummy32, &ace->who);
321 host_err = nfsd_map_name_to_uid(argp->rqstp,
322 buf, dummy32, &ace->who);
328 if (bmval[1] & FATTR4_WORD1_MODE) {
331 READ32(iattr->ia_mode);
332 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
333 iattr->ia_valid |= ATTR_MODE;
335 if (bmval[1] & FATTR4_WORD1_OWNER) {
340 len += (XDR_QUADLEN(dummy32) << 2);
341 READMEM(buf, dummy32);
342 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
344 iattr->ia_valid |= ATTR_UID;
346 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
351 len += (XDR_QUADLEN(dummy32) << 2);
352 READMEM(buf, dummy32);
353 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
355 iattr->ia_valid |= ATTR_GID;
357 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
362 case NFS4_SET_TO_CLIENT_TIME:
363 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
364 all 32 bits of 'nseconds'. */
370 READ32(iattr->ia_atime.tv_sec);
371 READ32(iattr->ia_atime.tv_nsec);
372 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
374 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
376 case NFS4_SET_TO_SERVER_TIME:
377 iattr->ia_valid |= ATTR_ATIME;
383 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
388 case NFS4_SET_TO_CLIENT_TIME:
389 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
390 all 32 bits of 'nseconds'. */
396 READ32(iattr->ia_mtime.tv_sec);
397 READ32(iattr->ia_mtime.tv_nsec);
398 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
400 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
402 case NFS4_SET_TO_SERVER_TIME:
403 iattr->ia_valid |= ATTR_MTIME;
409 if (len != expected_len)
415 status = nfserrno(host_err);
420 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
424 READ_BUF(sizeof(stateid_t));
425 READ32(sid->si_generation);
426 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
432 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
437 READ32(access->ac_req_access);
443 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
447 close->cl_stateowner = NULL;
449 READ32(close->cl_seqid);
450 return nfsd4_decode_stateid(argp, &close->cl_stateid);
457 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
462 READ64(commit->co_offset);
463 READ32(commit->co_count);
469 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
474 READ32(create->cr_type);
475 switch (create->cr_type) {
478 READ32(create->cr_linklen);
479 READ_BUF(create->cr_linklen);
480 SAVEMEM(create->cr_linkname, create->cr_linklen);
485 READ32(create->cr_specdata1);
486 READ32(create->cr_specdata2);
496 READ32(create->cr_namelen);
497 READ_BUF(create->cr_namelen);
498 SAVEMEM(create->cr_name, create->cr_namelen);
499 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
502 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
509 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
511 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
515 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
517 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
521 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
526 READ32(link->li_namelen);
527 READ_BUF(link->li_namelen);
528 SAVEMEM(link->li_name, link->li_namelen);
529 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
536 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
540 lock->lk_replay_owner = NULL;
542 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
545 READ32(lock->lk_type);
546 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
548 READ32(lock->lk_reclaim);
549 READ64(lock->lk_offset);
550 READ64(lock->lk_length);
551 READ32(lock->lk_is_new);
553 if (lock->lk_is_new) {
555 READ32(lock->lk_new_open_seqid);
556 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
559 READ_BUF(8 + sizeof(clientid_t));
560 READ32(lock->lk_new_lock_seqid);
561 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
562 READ32(lock->lk_new_owner.len);
563 READ_BUF(lock->lk_new_owner.len);
564 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
566 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
570 READ32(lock->lk_old_lock_seqid);
577 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
582 READ32(lockt->lt_type);
583 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
585 READ64(lockt->lt_offset);
586 READ64(lockt->lt_length);
587 COPYMEM(&lockt->lt_clientid, 8);
588 READ32(lockt->lt_owner.len);
589 READ_BUF(lockt->lt_owner.len);
590 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
592 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
598 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
602 locku->lu_stateowner = NULL;
604 READ32(locku->lu_type);
605 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
607 READ32(locku->lu_seqid);
608 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
612 READ64(locku->lu_offset);
613 READ64(locku->lu_length);
619 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
624 READ32(lookup->lo_len);
625 READ_BUF(lookup->lo_len);
626 SAVEMEM(lookup->lo_name, lookup->lo_len);
627 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
634 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
638 memset(open->op_bmval, 0, sizeof(open->op_bmval));
639 open->op_iattr.ia_valid = 0;
640 open->op_stateowner = NULL;
642 /* seqid, share_access, share_deny, clientid, ownerlen */
643 READ_BUF(16 + sizeof(clientid_t));
644 READ32(open->op_seqid);
645 READ32(open->op_share_access);
646 READ32(open->op_share_deny);
647 COPYMEM(&open->op_clientid, sizeof(clientid_t));
648 READ32(open->op_owner.len);
650 /* owner, open_flag */
651 READ_BUF(open->op_owner.len + 4);
652 SAVEMEM(open->op_owner.data, open->op_owner.len);
653 READ32(open->op_create);
654 switch (open->op_create) {
655 case NFS4_OPEN_NOCREATE:
657 case NFS4_OPEN_CREATE:
659 READ32(open->op_createmode);
660 switch (open->op_createmode) {
661 case NFS4_CREATE_UNCHECKED:
662 case NFS4_CREATE_GUARDED:
663 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
666 case NFS4_CREATE_EXCLUSIVE:
668 COPYMEM(open->op_verf.data, 8);
680 READ32(open->op_claim_type);
681 switch (open->op_claim_type) {
682 case NFS4_OPEN_CLAIM_NULL:
683 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
685 READ32(open->op_fname.len);
686 READ_BUF(open->op_fname.len);
687 SAVEMEM(open->op_fname.data, open->op_fname.len);
688 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
691 case NFS4_OPEN_CLAIM_PREVIOUS:
693 READ32(open->op_delegate_type);
695 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
696 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
700 READ32(open->op_fname.len);
701 READ_BUF(open->op_fname.len);
702 SAVEMEM(open->op_fname.data, open->op_fname.len);
703 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
714 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
718 open_conf->oc_stateowner = NULL;
719 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
723 READ32(open_conf->oc_seqid);
729 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
733 open_down->od_stateowner = NULL;
734 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
738 READ32(open_down->od_seqid);
739 READ32(open_down->od_share_access);
740 READ32(open_down->od_share_deny);
746 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
751 READ32(putfh->pf_fhlen);
752 if (putfh->pf_fhlen > NFS4_FHSIZE)
754 READ_BUF(putfh->pf_fhlen);
755 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
761 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
765 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
769 READ64(read->rd_offset);
770 READ32(read->rd_length);
776 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
781 READ64(readdir->rd_cookie);
782 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
783 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
784 READ32(readdir->rd_maxcount);
785 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
792 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
797 READ32(remove->rm_namelen);
798 READ_BUF(remove->rm_namelen);
799 SAVEMEM(remove->rm_name, remove->rm_namelen);
800 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
807 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
812 READ32(rename->rn_snamelen);
813 READ_BUF(rename->rn_snamelen + 4);
814 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
815 READ32(rename->rn_tnamelen);
816 READ_BUF(rename->rn_tnamelen);
817 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
818 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
820 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
827 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
831 READ_BUF(sizeof(clientid_t));
832 COPYMEM(clientid, sizeof(clientid_t));
838 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
839 struct nfsd4_secinfo *secinfo)
844 READ32(secinfo->si_namelen);
845 READ_BUF(secinfo->si_namelen);
846 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
847 status = check_filename(secinfo->si_name, secinfo->si_namelen,
855 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
859 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
862 return nfsd4_decode_fattr(argp, setattr->sa_bmval,
863 &setattr->sa_iattr, &setattr->sa_acl);
867 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
872 COPYMEM(setclientid->se_verf.data, 8);
873 READ32(setclientid->se_namelen);
875 READ_BUF(setclientid->se_namelen + 8);
876 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
877 READ32(setclientid->se_callback_prog);
878 READ32(setclientid->se_callback_netid_len);
880 READ_BUF(setclientid->se_callback_netid_len + 4);
881 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
882 READ32(setclientid->se_callback_addr_len);
884 READ_BUF(setclientid->se_callback_addr_len + 4);
885 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
886 READ32(setclientid->se_callback_ident);
892 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
896 READ_BUF(8 + sizeof(nfs4_verifier));
897 COPYMEM(&scd_c->sc_clientid, 8);
898 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
903 /* Also used for NVERIFY */
905 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
908 struct nfsd4_compoundargs save = {
911 .rqstp = argp->rqstp,
914 struct iattr ve_iattr; /* request */
915 struct nfs4_acl *ve_acl; /* request */
919 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
922 /* For convenience's sake, we compare raw xdr'd attributes in
923 * nfsd4_proc_verify; however we still decode here just to return
924 * correct error in case of bad xdr. */
926 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
927 if (status == nfserr_inval) {
928 status = nfserrno(status);
933 READ32(verify->ve_attrlen);
934 READ_BUF(verify->ve_attrlen);
935 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
941 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
948 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
952 READ64(write->wr_offset);
953 READ32(write->wr_stable_how);
954 if (write->wr_stable_how > 2)
956 READ32(write->wr_buflen);
958 /* Sorry .. no magic macros for this.. *
959 * READ_BUF(write->wr_buflen);
960 * SAVEMEM(write->wr_buf, write->wr_buflen);
962 avail = (char*)argp->end - (char*)argp->p;
963 if (avail + argp->pagelen < write->wr_buflen) {
964 dprintk("NFSD: xdr error (%s:%d)\n",
968 argp->rqstp->rq_vec[0].iov_base = p;
969 argp->rqstp->rq_vec[0].iov_len = avail;
971 len = write->wr_buflen;
972 while (len > argp->rqstp->rq_vec[v].iov_len) {
973 len -= argp->rqstp->rq_vec[v].iov_len;
975 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
977 if (argp->pagelen >= PAGE_SIZE) {
978 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
979 argp->pagelen -= PAGE_SIZE;
981 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
982 argp->pagelen -= len;
985 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
986 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
987 argp->rqstp->rq_vec[v].iov_len = len;
988 write->wr_vlen = v+1;
994 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
999 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1000 READ32(rlockowner->rl_owner.len);
1001 READ_BUF(rlockowner->rl_owner.len);
1002 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1004 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1005 return nfserr_inval;
1010 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1011 struct nfsd4_exchange_id *exid)
1016 READ_BUF(NFS4_VERIFIER_SIZE);
1017 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1020 READ32(exid->clname.len);
1022 READ_BUF(exid->clname.len);
1023 SAVEMEM(exid->clname.data, exid->clname.len);
1026 READ32(exid->flags);
1028 /* Ignore state_protect4_a */
1030 READ32(exid->spa_how);
1031 switch (exid->spa_how) {
1035 /* spo_must_enforce */
1038 READ_BUF(dummy * 4);
1041 /* spo_must_allow */
1044 READ_BUF(dummy * 4);
1051 READ_BUF(dummy * 4);
1056 READ_BUF(dummy * 4);
1059 /* ssp_hash_algs<> */
1063 p += XDR_QUADLEN(dummy);
1065 /* ssp_encr_algs<> */
1069 p += XDR_QUADLEN(dummy);
1071 /* ssp_window and ssp_num_gss_handles */
1080 /* Ignore Implementation ID */
1081 READ_BUF(4); /* nfs_impl_id4 array length */
1092 p += XDR_QUADLEN(dummy);
1098 p += XDR_QUADLEN(dummy);
1108 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1109 struct nfsd4_create_session *sess)
1119 COPYMEM(&sess->clientid, 8);
1120 READ32(sess->seqid);
1121 READ32(sess->flags);
1123 /* Fore channel attrs */
1125 READ32(dummy); /* headerpadsz is always 0 */
1126 READ32(sess->fore_channel.maxreq_sz);
1127 READ32(sess->fore_channel.maxresp_sz);
1128 READ32(sess->fore_channel.maxresp_cached);
1129 READ32(sess->fore_channel.maxops);
1130 READ32(sess->fore_channel.maxreqs);
1131 READ32(sess->fore_channel.nr_rdma_attrs);
1132 if (sess->fore_channel.nr_rdma_attrs == 1) {
1134 READ32(sess->fore_channel.rdma_attrs);
1135 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1136 dprintk("Too many fore channel attr bitmaps!\n");
1140 /* Back channel attrs */
1142 READ32(dummy); /* headerpadsz is always 0 */
1143 READ32(sess->back_channel.maxreq_sz);
1144 READ32(sess->back_channel.maxresp_sz);
1145 READ32(sess->back_channel.maxresp_cached);
1146 READ32(sess->back_channel.maxops);
1147 READ32(sess->back_channel.maxreqs);
1148 READ32(sess->back_channel.nr_rdma_attrs);
1149 if (sess->back_channel.nr_rdma_attrs == 1) {
1151 READ32(sess->back_channel.rdma_attrs);
1152 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1153 dprintk("Too many back channel attr bitmaps!\n");
1158 READ32(sess->callback_prog);
1160 /* callback_sec_params4 */
1161 READ32(nr_secflavs);
1162 for (i = 0; i < nr_secflavs; ++i) {
1167 /* Nothing to read */
1177 SAVEMEM(machine_name, dummy);
1187 READ_BUF(dummy * 4);
1188 for (i = 0; i < dummy; ++i)
1192 dprintk("RPC_AUTH_GSS callback secflavor "
1193 "not supported!\n");
1197 /* gcbp_handle_from_server */
1200 p += XDR_QUADLEN(dummy);
1201 /* gcbp_handle_from_client */
1205 p += XDR_QUADLEN(dummy);
1208 dprintk("Illegal callback secflavor\n");
1209 return nfserr_inval;
1216 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1217 struct nfsd4_destroy_session *destroy_session)
1220 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1221 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1227 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1228 struct nfsd4_sequence *seq)
1232 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1233 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1235 READ32(seq->slotid);
1236 READ32(seq->maxslots);
1237 READ32(seq->cachethis);
1243 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1249 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1251 return nfserr_notsupp;
1254 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1256 static nfsd4_dec nfsd4_dec_ops[] = {
1257 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1258 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1259 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1260 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1261 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1262 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1263 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1264 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1265 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1266 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1267 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1268 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1269 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1270 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1271 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1272 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1273 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1274 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1275 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1276 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1277 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1278 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1279 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1280 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1281 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1282 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1283 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1284 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1285 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1286 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1287 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1288 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1289 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1290 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1291 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1292 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1293 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1296 static nfsd4_dec nfsd41_dec_ops[] = {
1297 [OP_ACCESS] (nfsd4_dec)nfsd4_decode_access,
1298 [OP_CLOSE] (nfsd4_dec)nfsd4_decode_close,
1299 [OP_COMMIT] (nfsd4_dec)nfsd4_decode_commit,
1300 [OP_CREATE] (nfsd4_dec)nfsd4_decode_create,
1301 [OP_DELEGPURGE] (nfsd4_dec)nfsd4_decode_notsupp,
1302 [OP_DELEGRETURN] (nfsd4_dec)nfsd4_decode_delegreturn,
1303 [OP_GETATTR] (nfsd4_dec)nfsd4_decode_getattr,
1304 [OP_GETFH] (nfsd4_dec)nfsd4_decode_noop,
1305 [OP_LINK] (nfsd4_dec)nfsd4_decode_link,
1306 [OP_LOCK] (nfsd4_dec)nfsd4_decode_lock,
1307 [OP_LOCKT] (nfsd4_dec)nfsd4_decode_lockt,
1308 [OP_LOCKU] (nfsd4_dec)nfsd4_decode_locku,
1309 [OP_LOOKUP] (nfsd4_dec)nfsd4_decode_lookup,
1310 [OP_LOOKUPP] (nfsd4_dec)nfsd4_decode_noop,
1311 [OP_NVERIFY] (nfsd4_dec)nfsd4_decode_verify,
1312 [OP_OPEN] (nfsd4_dec)nfsd4_decode_open,
1313 [OP_OPENATTR] (nfsd4_dec)nfsd4_decode_notsupp,
1314 [OP_OPEN_CONFIRM] (nfsd4_dec)nfsd4_decode_notsupp,
1315 [OP_OPEN_DOWNGRADE] (nfsd4_dec)nfsd4_decode_open_downgrade,
1316 [OP_PUTFH] (nfsd4_dec)nfsd4_decode_putfh,
1317 [OP_PUTPUBFH] (nfsd4_dec)nfsd4_decode_notsupp,
1318 [OP_PUTROOTFH] (nfsd4_dec)nfsd4_decode_noop,
1319 [OP_READ] (nfsd4_dec)nfsd4_decode_read,
1320 [OP_READDIR] (nfsd4_dec)nfsd4_decode_readdir,
1321 [OP_READLINK] (nfsd4_dec)nfsd4_decode_noop,
1322 [OP_REMOVE] (nfsd4_dec)nfsd4_decode_remove,
1323 [OP_RENAME] (nfsd4_dec)nfsd4_decode_rename,
1324 [OP_RENEW] (nfsd4_dec)nfsd4_decode_notsupp,
1325 [OP_RESTOREFH] (nfsd4_dec)nfsd4_decode_noop,
1326 [OP_SAVEFH] (nfsd4_dec)nfsd4_decode_noop,
1327 [OP_SECINFO] (nfsd4_dec)nfsd4_decode_secinfo,
1328 [OP_SETATTR] (nfsd4_dec)nfsd4_decode_setattr,
1329 [OP_SETCLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1330 [OP_SETCLIENTID_CONFIRM](nfsd4_dec)nfsd4_decode_notsupp,
1331 [OP_VERIFY] (nfsd4_dec)nfsd4_decode_verify,
1332 [OP_WRITE] (nfsd4_dec)nfsd4_decode_write,
1333 [OP_RELEASE_LOCKOWNER] (nfsd4_dec)nfsd4_decode_notsupp,
1335 /* new operations for NFSv4.1 */
1336 [OP_BACKCHANNEL_CTL] (nfsd4_dec)nfsd4_decode_notsupp,
1337 [OP_BIND_CONN_TO_SESSION](nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_EXCHANGE_ID] (nfsd4_dec)nfsd4_decode_exchange_id,
1339 [OP_CREATE_SESSION] (nfsd4_dec)nfsd4_decode_create_session,
1340 [OP_DESTROY_SESSION] (nfsd4_dec)nfsd4_decode_destroy_session,
1341 [OP_FREE_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_GET_DIR_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1343 [OP_GETDEVICEINFO] (nfsd4_dec)nfsd4_decode_notsupp,
1344 [OP_GETDEVICELIST] (nfsd4_dec)nfsd4_decode_notsupp,
1345 [OP_LAYOUTCOMMIT] (nfsd4_dec)nfsd4_decode_notsupp,
1346 [OP_LAYOUTGET] (nfsd4_dec)nfsd4_decode_notsupp,
1347 [OP_LAYOUTRETURN] (nfsd4_dec)nfsd4_decode_notsupp,
1348 [OP_SECINFO_NO_NAME] (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_SEQUENCE] (nfsd4_dec)nfsd4_decode_sequence,
1350 [OP_SET_SSV] (nfsd4_dec)nfsd4_decode_notsupp,
1351 [OP_TEST_STATEID] (nfsd4_dec)nfsd4_decode_notsupp,
1352 [OP_WANT_DELEGATION] (nfsd4_dec)nfsd4_decode_notsupp,
1353 [OP_DESTROY_CLIENTID] (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_RECLAIM_COMPLETE] (nfsd4_dec)nfsd4_decode_notsupp,
1357 struct nfsd4_minorversion_ops {
1358 nfsd4_dec *decoders;
1362 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1363 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1364 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1368 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1371 struct nfsd4_op *op;
1372 struct nfsd4_minorversion_ops *ops;
1376 * XXX: According to spec, we should check the tag
1377 * for UTF-8 compliance. I'm postponing this for
1378 * now because it seems that some clients do use
1382 READ32(argp->taglen);
1383 READ_BUF(argp->taglen + 8);
1384 SAVEMEM(argp->tag, argp->taglen);
1385 READ32(argp->minorversion);
1386 READ32(argp->opcnt);
1388 if (argp->taglen > NFSD4_MAX_TAGLEN)
1390 if (argp->opcnt > 100)
1393 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1394 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1396 argp->ops = argp->iops;
1397 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1402 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1405 ops = &nfsd4_minorversion[argp->minorversion];
1406 for (i = 0; i < argp->opcnt; i++) {
1411 * We can't use READ_BUF() here because we need to handle
1412 * a missing opcode as an OP_WRITE + 1. So we need to check
1413 * to see if we're truly at the end of our buffer or if there
1414 * is another page we need to flip to.
1417 if (argp->p == argp->end) {
1418 if (argp->pagelen < 4) {
1419 /* There isn't an opcode still on the wire */
1420 op->opnum = OP_WRITE + 1;
1421 op->status = nfserr_bad_xdr;
1427 * False alarm. We just hit a page boundary, but there
1428 * is still data available. Move pointer across page
1429 * boundary. *snip from READ_BUF*
1431 argp->p = page_address(argp->pagelist[0]);
1433 if (argp->pagelen < PAGE_SIZE) {
1434 argp->end = p + (argp->pagelen>>2);
1437 argp->end = p + (PAGE_SIZE>>2);
1438 argp->pagelen -= PAGE_SIZE;
1441 op->opnum = ntohl(*argp->p++);
1443 if (op->opnum >= OP_ACCESS && op->opnum < ops->nops)
1444 op->status = ops->decoders[op->opnum](argp, &op->u);
1446 op->opnum = OP_ILLEGAL;
1447 op->status = nfserr_op_illegal;
1459 * END OF "GENERIC" DECODE ROUTINES.
1463 * START OF "GENERIC" ENCODE ROUTINES.
1464 * These may look a little ugly since they are imported from a "generic"
1465 * set of XDR encode/decode routines which are intended to be shared by
1466 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1468 * If the pain of reading these is too great, it should be a straightforward
1469 * task to translate them into Linux-specific versions which are more
1470 * consistent with the style used in NFSv2/v3...
1472 #define ENCODE_HEAD __be32 *p
1474 #define WRITE32(n) *p++ = htonl(n)
1475 #define WRITE64(n) do { \
1476 *p++ = htonl((u32)((n) >> 32)); \
1477 *p++ = htonl((u32)(n)); \
1479 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1480 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1481 memcpy(p, ptr, nbytes); \
1482 p += XDR_QUADLEN(nbytes); \
1484 #define WRITECINFO(c) do { \
1485 *p++ = htonl(c.atomic); \
1486 *p++ = htonl(c.before_ctime_sec); \
1487 *p++ = htonl(c.before_ctime_nsec); \
1488 *p++ = htonl(c.after_ctime_sec); \
1489 *p++ = htonl(c.after_ctime_nsec); \
1492 #define RESERVE_SPACE(nbytes) do { \
1494 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1496 #define ADJUST_ARGS() resp->p = p
1499 * Header routine to setup seqid operation replay cache
1501 #define ENCODE_SEQID_OP_HEAD \
1507 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1508 * is where sequence id's are incremented, and the replay cache is filled.
1509 * Note that we increment sequence id's here, at the last moment, so we're sure
1510 * we know whether the error to be returned is a sequence id mutating error.
1513 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1514 if (seqid_mutating_err(nfserr) && stateowner) { \
1515 stateowner->so_seqid++; \
1516 stateowner->so_replay.rp_status = nfserr; \
1517 stateowner->so_replay.rp_buflen = \
1518 (((char *)(resp)->p - (char *)save)); \
1519 memcpy(stateowner->so_replay.rp_buf, save, \
1520 stateowner->so_replay.rp_buflen); \
1523 /* Encode as an array of strings the string given with components
1526 static __be32 nfsd4_encode_components(char sep, char *components,
1527 __be32 **pp, int *buflen)
1531 int strlen, count=0;
1534 dprintk("nfsd4_encode_components(%s)\n", components);
1535 if ((*buflen -= 4) < 0)
1536 return nfserr_resource;
1537 WRITE32(0); /* We will fill this in with @count later */
1538 end = str = components;
1540 for (; *end && (*end != sep); end++)
1541 ; /* Point to end of component */
1544 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1545 return nfserr_resource;
1547 WRITEMEM(str, strlen);
1561 * encode a location element of a fs_locations structure
1563 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1564 __be32 **pp, int *buflen)
1569 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1572 status = nfsd4_encode_components('/', location->path, &p, buflen);
1580 * Return the path to an export point in the pseudo filesystem namespace
1581 * Returned string is safe to use as long as the caller holds a reference
1584 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1586 struct svc_fh tmp_fh;
1587 char *path, *rootpath;
1589 fh_init(&tmp_fh, NFS4_FHSIZE);
1590 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1593 rootpath = tmp_fh.fh_export->ex_pathname;
1595 path = exp->ex_pathname;
1597 if (strncmp(path, rootpath, strlen(rootpath))) {
1598 dprintk("nfsd: fs_locations failed;"
1599 "%s is not contained in %s\n", path, rootpath);
1600 *stat = nfserr_notsupp;
1604 return path + strlen(rootpath);
1608 * encode a fs_locations structure
1610 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1611 struct svc_export *exp,
1612 __be32 **pp, int *buflen)
1617 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1618 char *root = nfsd4_path(rqstp, exp, &status);
1622 status = nfsd4_encode_components('/', root, &p, buflen);
1625 if ((*buflen -= 4) < 0)
1626 return nfserr_resource;
1627 WRITE32(fslocs->locations_count);
1628 for (i=0; i<fslocs->locations_count; i++) {
1629 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1638 static u32 nfs4_ftypes[16] = {
1639 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1640 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1641 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1642 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1646 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1647 __be32 **p, int *buflen)
1651 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1652 return nfserr_resource;
1653 if (whotype != NFS4_ACL_WHO_NAMED)
1654 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1656 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1658 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1660 return nfserrno(status);
1661 *p = xdr_encode_opaque(*p, NULL, status);
1662 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1663 BUG_ON(*buflen < 0);
1667 static inline __be32
1668 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1670 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1673 static inline __be32
1674 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1676 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1679 static inline __be32
1680 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1681 __be32 **p, int *buflen)
1683 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1686 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1687 FATTR4_WORD0_RDATTR_ERROR)
1688 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1690 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1692 /* As per referral draft: */
1693 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1694 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1695 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1696 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1697 *rdattr_err = NFSERR_MOVED;
1699 return nfserr_moved;
1701 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1702 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1707 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1710 * @countp is the buffer size in _words_; upon successful return this becomes
1711 * replaced with the number of words written.
1714 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1715 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1716 struct svc_rqst *rqstp, int ignore_crossmnt)
1718 u32 bmval0 = bmval[0];
1719 u32 bmval1 = bmval[1];
1721 struct svc_fh tempfh;
1722 struct kstatfs statfs;
1723 int buflen = *countp << 2;
1732 struct nfs4_acl *acl = NULL;
1734 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1735 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1736 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1738 if (exp->ex_fslocs.migrated) {
1739 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1744 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1747 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1748 FATTR4_WORD0_MAXNAME)) ||
1749 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1750 FATTR4_WORD1_SPACE_TOTAL))) {
1751 err = vfs_statfs(dentry, &statfs);
1755 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1756 fh_init(&tempfh, NFS4_FHSIZE);
1757 status = fh_compose(&tempfh, exp, dentry, NULL);
1762 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1763 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1764 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1765 aclsupport = (err == 0);
1766 if (bmval0 & FATTR4_WORD0_ACL) {
1767 if (err == -EOPNOTSUPP)
1768 bmval0 &= ~FATTR4_WORD0_ACL;
1769 else if (err == -EINVAL) {
1770 status = nfserr_attrnotsupp;
1772 } else if (err != 0)
1776 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1777 if (exp->ex_fslocs.locations == NULL) {
1778 bmval0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1781 if ((buflen -= 16) < 0)
1787 attrlenp = p++; /* to be backfilled later */
1789 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1790 u32 word0 = NFSD_SUPPORTED_ATTRS_WORD0;
1791 if ((buflen -= 12) < 0)
1794 word0 &= ~FATTR4_WORD0_ACL;
1795 if (!exp->ex_fslocs.locations)
1796 word0 &= ~FATTR4_WORD0_FS_LOCATIONS;
1799 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1801 if (bmval0 & FATTR4_WORD0_TYPE) {
1802 if ((buflen -= 4) < 0)
1804 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1805 if (dummy == NF4BAD)
1806 goto out_serverfault;
1809 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1810 if ((buflen -= 4) < 0)
1812 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1813 WRITE32(NFS4_FH_PERSISTENT);
1815 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1817 if (bmval0 & FATTR4_WORD0_CHANGE) {
1819 * Note: This _must_ be consistent with the scheme for writing
1820 * change_info, so any changes made here must be reflected there
1821 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1824 if ((buflen -= 8) < 0)
1826 WRITE32(stat.ctime.tv_sec);
1827 WRITE32(stat.ctime.tv_nsec);
1829 if (bmval0 & FATTR4_WORD0_SIZE) {
1830 if ((buflen -= 8) < 0)
1834 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1835 if ((buflen -= 4) < 0)
1839 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1840 if ((buflen -= 4) < 0)
1844 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1845 if ((buflen -= 4) < 0)
1849 if (bmval0 & FATTR4_WORD0_FSID) {
1850 if ((buflen -= 16) < 0)
1852 if (exp->ex_fslocs.migrated) {
1853 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1854 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1855 } else switch(fsid_source(fhp)) {
1856 case FSIDSOURCE_FSID:
1857 WRITE64((u64)exp->ex_fsid);
1860 case FSIDSOURCE_DEV:
1862 WRITE32(MAJOR(stat.dev));
1864 WRITE32(MINOR(stat.dev));
1866 case FSIDSOURCE_UUID:
1867 WRITEMEM(exp->ex_uuid, 16);
1871 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1872 if ((buflen -= 4) < 0)
1876 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1877 if ((buflen -= 4) < 0)
1879 WRITE32(NFSD_LEASE_TIME);
1881 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1882 if ((buflen -= 4) < 0)
1884 WRITE32(rdattr_err);
1886 if (bmval0 & FATTR4_WORD0_ACL) {
1887 struct nfs4_ace *ace;
1890 if ((buflen -= 4) < 0)
1896 if ((buflen -= 4) < 0)
1898 WRITE32(acl->naces);
1900 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1901 if ((buflen -= 4*3) < 0)
1905 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1906 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1907 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1909 if (status == nfserr_resource)
1916 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1917 if ((buflen -= 4) < 0)
1919 WRITE32(aclsupport ?
1920 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1922 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1923 if ((buflen -= 4) < 0)
1927 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1928 if ((buflen -= 4) < 0)
1932 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1933 if ((buflen -= 4) < 0)
1937 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1938 if ((buflen -= 4) < 0)
1942 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1943 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1946 WRITE32(fhp->fh_handle.fh_size);
1947 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1949 if (bmval0 & FATTR4_WORD0_FILEID) {
1950 if ((buflen -= 8) < 0)
1954 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1955 if ((buflen -= 8) < 0)
1957 WRITE64((u64) statfs.f_ffree);
1959 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1960 if ((buflen -= 8) < 0)
1962 WRITE64((u64) statfs.f_ffree);
1964 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1965 if ((buflen -= 8) < 0)
1967 WRITE64((u64) statfs.f_files);
1969 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
1970 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
1971 if (status == nfserr_resource)
1976 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1977 if ((buflen -= 4) < 0)
1981 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1982 if ((buflen -= 8) < 0)
1986 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1987 if ((buflen -= 4) < 0)
1991 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1992 if ((buflen -= 4) < 0)
1994 WRITE32(statfs.f_namelen);
1996 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1997 if ((buflen -= 8) < 0)
1999 WRITE64((u64) svc_max_payload(rqstp));
2001 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2002 if ((buflen -= 8) < 0)
2004 WRITE64((u64) svc_max_payload(rqstp));
2006 if (bmval1 & FATTR4_WORD1_MODE) {
2007 if ((buflen -= 4) < 0)
2009 WRITE32(stat.mode & S_IALLUGO);
2011 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2012 if ((buflen -= 4) < 0)
2016 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2017 if ((buflen -= 4) < 0)
2019 WRITE32(stat.nlink);
2021 if (bmval1 & FATTR4_WORD1_OWNER) {
2022 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2023 if (status == nfserr_resource)
2028 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2029 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2030 if (status == nfserr_resource)
2035 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2036 if ((buflen -= 8) < 0)
2038 WRITE32((u32) MAJOR(stat.rdev));
2039 WRITE32((u32) MINOR(stat.rdev));
2041 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2042 if ((buflen -= 8) < 0)
2044 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2047 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2048 if ((buflen -= 8) < 0)
2050 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2053 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2054 if ((buflen -= 8) < 0)
2056 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2059 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2060 if ((buflen -= 8) < 0)
2062 dummy64 = (u64)stat.blocks << 9;
2065 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2066 if ((buflen -= 12) < 0)
2069 WRITE32(stat.atime.tv_sec);
2070 WRITE32(stat.atime.tv_nsec);
2072 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2073 if ((buflen -= 12) < 0)
2079 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2080 if ((buflen -= 12) < 0)
2083 WRITE32(stat.ctime.tv_sec);
2084 WRITE32(stat.ctime.tv_nsec);
2086 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2087 if ((buflen -= 12) < 0)
2090 WRITE32(stat.mtime.tv_sec);
2091 WRITE32(stat.mtime.tv_nsec);
2093 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2094 if ((buflen -= 8) < 0)
2097 * Get parent's attributes if not ignoring crossmount
2098 * and this is the root of a cross-mounted filesystem.
2100 if (ignore_crossmnt == 0 &&
2101 exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
2102 err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
2103 exp->ex_path.mnt->mnt_mountpoint, &stat);
2109 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2110 *countp = p - buffer;
2119 status = nfserrno(err);
2123 status = nfserr_resource;
2126 status = nfserr_serverfault;
2130 static inline int attributes_need_mount(u32 *bmval)
2132 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2134 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2140 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2141 const char *name, int namlen, __be32 *p, int *buflen)
2143 struct svc_export *exp = cd->rd_fhp->fh_export;
2144 struct dentry *dentry;
2146 int ignore_crossmnt = 0;
2148 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2150 return nfserrno(PTR_ERR(dentry));
2154 * In the case of a mountpoint, the client may be asking for
2155 * attributes that are only properties of the underlying filesystem
2156 * as opposed to the cross-mounted file system. In such a case,
2157 * we will not follow the cross mount and will fill the attribtutes
2158 * directly from the mountpoint dentry.
2160 if (d_mountpoint(dentry) && !attributes_need_mount(cd->rd_bmval))
2161 ignore_crossmnt = 1;
2162 else if (d_mountpoint(dentry)) {
2166 * Why the heck aren't we just using nfsd_lookup??
2167 * Different "."/".." handling? Something else?
2168 * At least, add a comment here to explain....
2170 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2172 nfserr = nfserrno(err);
2175 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2180 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2181 cd->rd_rqstp, ignore_crossmnt);
2189 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2196 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2197 *p++ = htonl(0); /* bmval1 */
2200 *p++ = nfserr; /* no htonl */
2201 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2206 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2207 loff_t offset, u64 ino, unsigned int d_type)
2209 struct readdir_cd *ccd = ccdv;
2210 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2212 __be32 *p = cd->buffer;
2213 __be32 nfserr = nfserr_toosmall;
2215 /* In nfsv4, "." and ".." never make it onto the wire.. */
2216 if (name && isdotent(name, namlen)) {
2217 cd->common.err = nfs_ok;
2222 xdr_encode_hyper(cd->offset, (u64) offset);
2224 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2228 *p++ = xdr_one; /* mark entry present */
2229 cd->offset = p; /* remember pointer */
2230 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2231 p = xdr_encode_array(p, name, namlen); /* name length & name */
2233 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2238 case nfserr_resource:
2239 nfserr = nfserr_toosmall;
2245 * If the client requested the RDATTR_ERROR attribute,
2246 * we stuff the error code into this attribute
2247 * and continue. If this attribute was not requested,
2248 * then in accordance with the spec, we fail the
2249 * entire READDIR operation(!)
2251 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2253 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2255 nfserr = nfserr_toosmall;
2259 cd->buflen -= (p - cd->buffer);
2261 cd->common.err = nfs_ok;
2264 cd->common.err = nfserr;
2269 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2273 RESERVE_SPACE(sizeof(stateid_t));
2274 WRITE32(sid->si_generation);
2275 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2280 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2286 WRITE32(access->ac_supported);
2287 WRITE32(access->ac_resp_access);
2294 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2296 ENCODE_SEQID_OP_HEAD;
2299 nfsd4_encode_stateid(resp, &close->cl_stateid);
2301 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2307 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2313 WRITEMEM(commit->co_verf.data, 8);
2320 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2326 WRITECINFO(create->cr_cinfo);
2328 WRITE32(create->cr_bmval[0]);
2329 WRITE32(create->cr_bmval[1]);
2336 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2338 struct svc_fh *fhp = getattr->ga_fhp;
2344 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2345 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2346 resp->p, &buflen, getattr->ga_bmval,
2354 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2356 struct svc_fh *fhp = *fhpp;
2361 len = fhp->fh_handle.fh_size;
2362 RESERVE_SPACE(len + 4);
2364 WRITEMEM(&fhp->fh_handle.fh_base, len);
2371 * Including all fields other than the name, a LOCK4denied structure requires
2372 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2375 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2379 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2380 WRITE64(ld->ld_start);
2381 WRITE64(ld->ld_length);
2382 WRITE32(ld->ld_type);
2384 WRITEMEM(&ld->ld_clientid, 8);
2385 WRITE32(ld->ld_sop->so_owner.len);
2386 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2387 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2388 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2389 WRITE64((u64)0); /* clientid */
2390 WRITE32(0); /* length of owner name */
2396 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2398 ENCODE_SEQID_OP_HEAD;
2401 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2402 else if (nfserr == nfserr_denied)
2403 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2405 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2410 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2412 if (nfserr == nfserr_denied)
2413 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2418 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2420 ENCODE_SEQID_OP_HEAD;
2423 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2425 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2431 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2437 WRITECINFO(link->li_cinfo);
2445 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2448 ENCODE_SEQID_OP_HEAD;
2453 nfsd4_encode_stateid(resp, &open->op_stateid);
2455 WRITECINFO(open->op_cinfo);
2456 WRITE32(open->op_rflags);
2458 WRITE32(open->op_bmval[0]);
2459 WRITE32(open->op_bmval[1]);
2460 WRITE32(open->op_delegate_type);
2463 switch (open->op_delegate_type) {
2464 case NFS4_OPEN_DELEGATE_NONE:
2466 case NFS4_OPEN_DELEGATE_READ:
2467 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2469 WRITE32(open->op_recall);
2472 * TODO: ACE's in delegations
2474 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2477 WRITE32(0); /* XXX: is NULL principal ok? */
2480 case NFS4_OPEN_DELEGATE_WRITE:
2481 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2486 * TODO: space_limit's in delegations
2488 WRITE32(NFS4_LIMIT_SIZE);
2493 * TODO: ACE's in delegations
2495 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2498 WRITE32(0); /* XXX: is NULL principal ok? */
2504 /* XXX save filehandle here */
2506 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2511 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2513 ENCODE_SEQID_OP_HEAD;
2516 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2518 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2523 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2525 ENCODE_SEQID_OP_HEAD;
2528 nfsd4_encode_stateid(resp, &od->od_stateid);
2530 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2535 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2536 struct nfsd4_read *read)
2540 unsigned long maxcount;
2546 if (resp->xbuf->page_len)
2547 return nfserr_resource;
2549 RESERVE_SPACE(8); /* eof flag and byte count */
2551 maxcount = svc_max_payload(resp->rqstp);
2552 if (maxcount > read->rd_length)
2553 maxcount = read->rd_length;
2558 pn = resp->rqstp->rq_resused++;
2559 resp->rqstp->rq_vec[v].iov_base =
2560 page_address(resp->rqstp->rq_respages[pn]);
2561 resp->rqstp->rq_vec[v].iov_len =
2562 len < PAGE_SIZE ? len : PAGE_SIZE;
2568 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2569 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2572 if (nfserr == nfserr_symlink)
2573 nfserr = nfserr_inval;
2576 eof = (read->rd_offset + maxcount >=
2577 read->rd_fhp->fh_dentry->d_inode->i_size);
2582 resp->xbuf->head[0].iov_len = (char*)p
2583 - (char*)resp->xbuf->head[0].iov_base;
2584 resp->xbuf->page_len = maxcount;
2586 /* Use rest of head for padding and remaining ops: */
2587 resp->xbuf->tail[0].iov_base = p;
2588 resp->xbuf->tail[0].iov_len = 0;
2592 resp->xbuf->tail[0].iov_base += maxcount&3;
2593 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2600 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2608 if (resp->xbuf->page_len)
2609 return nfserr_resource;
2611 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2613 maxcount = PAGE_SIZE;
2617 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2618 * if they would overflow the buffer. Is this kosher in NFSv4? If
2619 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2620 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2622 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2623 if (nfserr == nfserr_isdir)
2624 return nfserr_inval;
2630 resp->xbuf->head[0].iov_len = (char*)p
2631 - (char*)resp->xbuf->head[0].iov_base;
2632 resp->xbuf->page_len = maxcount;
2634 /* Use rest of head for padding and remaining ops: */
2635 resp->xbuf->tail[0].iov_base = p;
2636 resp->xbuf->tail[0].iov_len = 0;
2640 resp->xbuf->tail[0].iov_base += maxcount&3;
2641 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2648 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2652 __be32 *page, *savep, *tailbase;
2657 if (resp->xbuf->page_len)
2658 return nfserr_resource;
2660 RESERVE_SPACE(8); /* verifier */
2663 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2667 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2670 maxcount = PAGE_SIZE;
2671 if (maxcount > readdir->rd_maxcount)
2672 maxcount = readdir->rd_maxcount;
2675 * Convert from bytes to words, account for the two words already
2676 * written, make sure to leave two words at the end for the next
2677 * pointer and eof field.
2679 maxcount = (maxcount >> 2) - 4;
2681 nfserr = nfserr_toosmall;
2685 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2686 readdir->common.err = 0;
2687 readdir->buflen = maxcount;
2688 readdir->buffer = page;
2689 readdir->offset = NULL;
2691 offset = readdir->rd_cookie;
2692 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2694 &readdir->common, nfsd4_encode_dirent);
2695 if (nfserr == nfs_ok &&
2696 readdir->common.err == nfserr_toosmall &&
2697 readdir->buffer == page)
2698 nfserr = nfserr_toosmall;
2699 if (nfserr == nfserr_symlink)
2700 nfserr = nfserr_notdir;
2704 if (readdir->offset)
2705 xdr_encode_hyper(readdir->offset, offset);
2707 p = readdir->buffer;
2708 *p++ = 0; /* no more entries */
2709 *p++ = htonl(readdir->common.err == nfserr_eof);
2710 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2711 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2713 /* Use rest of head for padding and remaining ops: */
2714 resp->xbuf->tail[0].iov_base = tailbase;
2715 resp->xbuf->tail[0].iov_len = 0;
2716 resp->p = resp->xbuf->tail[0].iov_base;
2717 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2727 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2733 WRITECINFO(remove->rm_cinfo);
2740 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2746 WRITECINFO(rename->rn_sinfo);
2747 WRITECINFO(rename->rn_tinfo);
2754 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2755 struct nfsd4_secinfo *secinfo)
2758 struct svc_export *exp = secinfo->si_exp;
2760 struct exp_flavor_info *flavs;
2761 struct exp_flavor_info def_flavs[2];
2766 if (exp->ex_nflavors) {
2767 flavs = exp->ex_flavors;
2768 nflavs = exp->ex_nflavors;
2769 } else { /* Handling of some defaults in absence of real secinfo: */
2771 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2773 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2774 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2775 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2777 flavs[0].pseudoflavor
2778 = svcauth_gss_flavor(exp->ex_client);
2781 flavs[0].pseudoflavor
2782 = exp->ex_client->flavour->flavour;
2789 for (i = 0; i < nflavs; i++) {
2790 u32 flav = flavs[i].pseudoflavor;
2791 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2795 WRITE32(RPC_AUTH_GSS);
2797 RESERVE_SPACE(4 + gm->gm_oid.len);
2798 WRITE32(gm->gm_oid.len);
2799 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2802 WRITE32(0); /* qop */
2805 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2821 * The SETATTR encode routine is special -- it always encodes a bitmap,
2822 * regardless of the error status.
2825 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2837 WRITE32(setattr->sa_bmval[0]);
2838 WRITE32(setattr->sa_bmval[1]);
2845 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2850 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2851 WRITEMEM(&scd->se_clientid, 8);
2852 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2855 else if (nfserr == nfserr_clid_inuse) {
2865 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2871 WRITE32(write->wr_bytes_written);
2872 WRITE32(write->wr_how_written);
2873 WRITEMEM(write->wr_verifier.data, 8);
2880 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2881 struct nfsd4_exchange_id *exid)
2887 int server_scope_sz;
2888 uint64_t minor_id = 0;
2893 major_id = utsname()->nodename;
2894 major_id_sz = strlen(major_id);
2895 server_scope = utsname()->nodename;
2896 server_scope_sz = strlen(server_scope);
2899 8 /* eir_clientid */ +
2900 4 /* eir_sequenceid */ +
2902 4 /* spr_how (SP4_NONE) */ +
2903 8 /* so_minor_id */ +
2904 4 /* so_major_id.len */ +
2905 (XDR_QUADLEN(major_id_sz) * 4) +
2906 4 /* eir_server_scope.len */ +
2907 (XDR_QUADLEN(server_scope_sz) * 4) +
2908 4 /* eir_server_impl_id.count (0) */);
2910 WRITEMEM(&exid->clientid, 8);
2911 WRITE32(exid->seqid);
2912 WRITE32(exid->flags);
2914 /* state_protect4_r. Currently only support SP4_NONE */
2915 BUG_ON(exid->spa_how != SP4_NONE);
2916 WRITE32(exid->spa_how);
2918 /* The server_owner struct */
2919 WRITE64(minor_id); /* Minor id */
2921 WRITE32(major_id_sz);
2922 WRITEMEM(major_id, major_id_sz);
2925 WRITE32(server_scope_sz);
2926 WRITEMEM(server_scope, server_scope_sz);
2928 /* Implementation id */
2929 WRITE32(0); /* zero length nfs_impl_id4 array */
2935 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
2936 struct nfsd4_create_session *sess)
2944 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2945 WRITE32(sess->seqid);
2946 WRITE32(sess->flags);
2950 WRITE32(0); /* headerpadsz */
2951 WRITE32(sess->fore_channel.maxreq_sz);
2952 WRITE32(sess->fore_channel.maxresp_sz);
2953 WRITE32(sess->fore_channel.maxresp_cached);
2954 WRITE32(sess->fore_channel.maxops);
2955 WRITE32(sess->fore_channel.maxreqs);
2956 WRITE32(sess->fore_channel.nr_rdma_attrs);
2959 if (sess->fore_channel.nr_rdma_attrs) {
2961 WRITE32(sess->fore_channel.rdma_attrs);
2966 WRITE32(0); /* headerpadsz */
2967 WRITE32(sess->back_channel.maxreq_sz);
2968 WRITE32(sess->back_channel.maxresp_sz);
2969 WRITE32(sess->back_channel.maxresp_cached);
2970 WRITE32(sess->back_channel.maxops);
2971 WRITE32(sess->back_channel.maxreqs);
2972 WRITE32(sess->back_channel.nr_rdma_attrs);
2975 if (sess->back_channel.nr_rdma_attrs) {
2977 WRITE32(sess->back_channel.rdma_attrs);
2984 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
2985 struct nfsd4_destroy_session *destroy_session)
2991 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
2992 struct nfsd4_sequence *seq)
2999 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3000 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3001 WRITE32(seq->seqid);
3002 WRITE32(seq->slotid);
3003 WRITE32(seq->maxslots);
3006 * target_maxslots = maxslots
3009 WRITE32(seq->maxslots);
3017 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3022 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3025 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3026 * since we don't need to filter out obsolete ops as this is
3027 * done in the decoding phase.
3029 static nfsd4_enc nfsd4_enc_ops[] = {
3030 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3031 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3032 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3033 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3034 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3035 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3036 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3037 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3038 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3039 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3040 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3041 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3042 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3043 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3044 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3045 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3046 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3047 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3048 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3049 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3050 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3051 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3052 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3053 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3054 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3055 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3056 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3057 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3058 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3059 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3060 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3061 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3062 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3063 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3064 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3065 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3066 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3068 /* NFSv4.1 operations */
3069 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3070 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3071 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3072 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3073 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3074 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3075 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3076 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3077 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3078 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3079 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3080 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3081 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop,
3082 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3083 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3084 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3085 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3086 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3087 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3091 * Calculate the total amount of memory that the compound response has taken
3092 * after encoding the current operation.
3094 * pad: add on 8 bytes for the next operation's op_code and status so that
3095 * there is room to cache a failure on the next operation.
3097 * Compare this length to the session se_fmaxresp_cached.
3099 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3100 * will be at least a page and will therefore hold the xdr_buf head.
3102 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3105 struct xdr_buf *xb = &resp->rqstp->rq_res;
3106 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3107 struct nfsd4_session *session = NULL;
3108 struct nfsd4_slot *slot = resp->cstate.slot;
3109 u32 length, tlen = 0, pad = 8;
3111 if (!nfsd4_has_session(&resp->cstate))
3114 session = resp->cstate.session;
3115 if (session == NULL || slot->sl_cache_entry.ce_cachethis == 0)
3118 if (resp->opcnt >= args->opcnt)
3119 pad = 0; /* this is the last operation */
3121 if (xb->page_len == 0) {
3122 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3124 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3125 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3127 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3129 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3130 length, xb->page_len, tlen, pad);
3132 if (length <= session->se_fmaxresp_cached)
3135 return nfserr_rep_too_big_to_cache;
3139 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3146 statp = p++; /* to be backfilled at the end */
3149 if (op->opnum == OP_ILLEGAL)
3151 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3152 !nfsd4_enc_ops[op->opnum]);
3153 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3154 /* nfsd4_check_drc_limit guarantees enough room for error status */
3155 if (!op->status && nfsd4_check_drc_limit(resp))
3156 op->status = nfserr_rep_too_big_to_cache;
3159 * Note: We write the status directly, instead of using WRITE32(),
3160 * since it is already in network byte order.
3162 *statp = op->status;
3166 * Encode the reply stored in the stateowner reply cache
3168 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3169 * previously sent already encoded operation.
3171 * called with nfs4_lock_state() held
3174 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3177 struct nfs4_replay *rp = op->replay;
3183 *p++ = rp->rp_status; /* already xdr'ed */
3186 RESERVE_SPACE(rp->rp_buflen);
3187 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3192 * END OF "GENERIC" ENCODE ROUTINES.
3196 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3198 return xdr_ressize_check(rqstp, p);
3201 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3203 if (args->ops != args->iops) {
3205 args->ops = args->iops;
3209 while (args->to_free) {
3210 struct tmpbuf *tb = args->to_free;
3211 args->to_free = tb->next;
3212 tb->release(tb->buf);
3218 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3223 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3224 args->pagelist = rqstp->rq_arg.pages;
3225 args->pagelen = rqstp->rq_arg.page_len;
3227 args->to_free = NULL;
3228 args->ops = args->iops;
3229 args->rqstp = rqstp;
3231 status = nfsd4_decode_compound(args);
3233 nfsd4_release_compoundargs(args);
3239 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3242 * All that remains is to write the tag and operation count...
3246 *p++ = htonl(resp->taglen);
3247 memcpy(p, resp->tag, resp->taglen);
3248 p += XDR_QUADLEN(resp->taglen);
3249 *p++ = htonl(resp->opcnt);
3251 if (rqstp->rq_res.page_len)
3252 iov = &rqstp->rq_res.tail[0];
3254 iov = &rqstp->rq_res.head[0];
3255 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3256 BUG_ON(iov->iov_len > PAGE_SIZE);
3257 if (nfsd4_has_session(&resp->cstate)) {
3258 if (resp->cstate.status == nfserr_replay_cache &&
3259 !nfsd4_not_cached(resp)) {
3260 iov->iov_len = resp->cstate.iovlen;
3262 nfsd4_store_cache_entry(resp);
3263 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3264 resp->cstate.slot->sl_inuse = 0;
3266 if (resp->cstate.session)
3267 nfsd4_put_session(resp->cstate.session);