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/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/nfsd_idmap.h>
48 #include <linux/nfs4_acl.h>
49 #include <linux/sunrpc/svcauth_gss.h>
54 #define NFSDDBG_FACILITY NFSDDBG_XDR
57 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
58 * directory in order to indicate to the client that a filesystem boundary is present
59 * We use a fixed fsid for a referral
61 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
62 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
65 check_filename(char *str, int len, __be32 err)
71 if (isdotent(str, len))
73 for (i = 0; i < len; i++)
87 dprintk("NFSD: xdr error (%s:%d)\n", \
88 __FILE__, __LINE__); \
89 status = nfserr_bad_xdr; \
92 #define READ32(x) (x) = ntohl(*p++)
93 #define READ64(x) do { \
94 (x) = (u64)ntohl(*p++) << 32; \
97 #define READTIME(x) do { \
102 #define READMEM(x,nbytes) do { \
104 p += XDR_QUADLEN(nbytes); \
106 #define SAVEMEM(x,nbytes) do { \
107 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
108 savemem(argp, p, nbytes) : \
110 dprintk("NFSD: xdr error (%s:%d)\n", \
111 __FILE__, __LINE__); \
114 p += XDR_QUADLEN(nbytes); \
116 #define COPYMEM(x,nbytes) do { \
117 memcpy((x), p, nbytes); \
118 p += XDR_QUADLEN(nbytes); \
121 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
122 #define READ_BUF(nbytes) do { \
123 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
125 argp->p += XDR_QUADLEN(nbytes); \
126 } else if (!(p = read_buf(argp, nbytes))) { \
127 dprintk("NFSD: xdr error (%s:%d)\n", \
128 __FILE__, __LINE__); \
133 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
135 /* We want more bytes than seem to be available.
136 * Maybe we need a new page, maybe we have just run out
138 unsigned int avail = (char *)argp->end - (char *)argp->p;
140 if (avail + argp->pagelen < nbytes)
142 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
144 /* ok, we can do it with the current plus the next page */
145 if (nbytes <= sizeof(argp->tmp))
149 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
155 * The following memcpy is safe because read_buf is always
156 * called with nbytes > avail, and the two cases above both
157 * guarantee p points to at least nbytes bytes.
159 memcpy(p, argp->p, avail);
160 /* step to next page */
161 argp->p = page_address(argp->pagelist[0]);
163 if (argp->pagelen < PAGE_SIZE) {
164 argp->end = argp->p + (argp->pagelen>>2);
167 argp->end = argp->p + (PAGE_SIZE>>2);
168 argp->pagelen -= PAGE_SIZE;
170 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
171 argp->p += XDR_QUADLEN(nbytes - avail);
175 static int zero_clientid(clientid_t *clid)
177 return (clid->cl_boot == 0) && (clid->cl_id == 0);
181 defer_free(struct nfsd4_compoundargs *argp,
182 void (*release)(const void *), void *p)
186 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
190 tb->release = release;
191 tb->next = argp->to_free;
196 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
198 if (p == argp->tmp) {
199 p = kmalloc(nbytes, GFP_KERNEL);
202 memcpy(p, argp->tmp, nbytes);
204 BUG_ON(p != argp->tmpp);
207 if (defer_free(argp, kfree, p)) {
215 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
229 READ_BUF(bmlen << 2);
241 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
242 struct iattr *iattr, struct nfs4_acl **acl)
244 int expected_len, len = 0;
251 if ((status = nfsd4_decode_bitmap(argp, bmval)))
255 READ32(expected_len);
257 if (bmval[0] & FATTR4_WORD0_SIZE) {
260 READ64(iattr->ia_size);
261 iattr->ia_valid |= ATTR_SIZE;
263 if (bmval[0] & FATTR4_WORD0_ACL) {
265 struct nfs4_ace *ace;
267 READ_BUF(4); len += 4;
270 if (nace > NFS4_ACL_MAX)
271 return nfserr_resource;
273 *acl = nfs4_acl_new(nace);
278 defer_free(argp, kfree, *acl);
280 (*acl)->naces = nace;
281 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
282 READ_BUF(16); len += 16;
285 READ32(ace->access_mask);
288 len += XDR_QUADLEN(dummy32) << 2;
289 READMEM(buf, dummy32);
290 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
292 if (ace->whotype != NFS4_ACL_WHO_NAMED)
294 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
295 host_err = nfsd_map_name_to_gid(argp->rqstp,
296 buf, dummy32, &ace->who);
298 host_err = nfsd_map_name_to_uid(argp->rqstp,
299 buf, dummy32, &ace->who);
305 if (bmval[1] & FATTR4_WORD1_MODE) {
308 READ32(iattr->ia_mode);
309 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
310 iattr->ia_valid |= ATTR_MODE;
312 if (bmval[1] & FATTR4_WORD1_OWNER) {
317 len += (XDR_QUADLEN(dummy32) << 2);
318 READMEM(buf, dummy32);
319 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
321 iattr->ia_valid |= ATTR_UID;
323 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
328 len += (XDR_QUADLEN(dummy32) << 2);
329 READMEM(buf, dummy32);
330 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
332 iattr->ia_valid |= ATTR_GID;
334 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
339 case NFS4_SET_TO_CLIENT_TIME:
340 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
341 all 32 bits of 'nseconds'. */
347 READ32(iattr->ia_atime.tv_sec);
348 READ32(iattr->ia_atime.tv_nsec);
349 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
351 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
353 case NFS4_SET_TO_SERVER_TIME:
354 iattr->ia_valid |= ATTR_ATIME;
360 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
365 case NFS4_SET_TO_CLIENT_TIME:
366 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
367 all 32 bits of 'nseconds'. */
373 READ32(iattr->ia_mtime.tv_sec);
374 READ32(iattr->ia_mtime.tv_nsec);
375 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
377 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
379 case NFS4_SET_TO_SERVER_TIME:
380 iattr->ia_valid |= ATTR_MTIME;
386 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
387 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
388 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
389 READ_BUF(expected_len - len);
390 else if (len != expected_len)
396 status = nfserrno(host_err);
401 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
405 READ_BUF(sizeof(stateid_t));
406 READ32(sid->si_generation);
407 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
413 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
418 READ32(access->ac_req_access);
424 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
428 close->cl_stateowner = NULL;
430 READ32(close->cl_seqid);
431 return nfsd4_decode_stateid(argp, &close->cl_stateid);
438 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
443 READ64(commit->co_offset);
444 READ32(commit->co_count);
450 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
455 READ32(create->cr_type);
456 switch (create->cr_type) {
459 READ32(create->cr_linklen);
460 READ_BUF(create->cr_linklen);
461 SAVEMEM(create->cr_linkname, create->cr_linklen);
466 READ32(create->cr_specdata1);
467 READ32(create->cr_specdata2);
477 READ32(create->cr_namelen);
478 READ_BUF(create->cr_namelen);
479 SAVEMEM(create->cr_name, create->cr_namelen);
480 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
483 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
492 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
494 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
498 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
500 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
504 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
509 READ32(link->li_namelen);
510 READ_BUF(link->li_namelen);
511 SAVEMEM(link->li_name, link->li_namelen);
512 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
519 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
523 lock->lk_replay_owner = NULL;
525 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
528 READ32(lock->lk_type);
529 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
531 READ32(lock->lk_reclaim);
532 READ64(lock->lk_offset);
533 READ64(lock->lk_length);
534 READ32(lock->lk_is_new);
536 if (lock->lk_is_new) {
538 READ32(lock->lk_new_open_seqid);
539 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
542 READ_BUF(8 + sizeof(clientid_t));
543 READ32(lock->lk_new_lock_seqid);
544 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
545 READ32(lock->lk_new_owner.len);
546 READ_BUF(lock->lk_new_owner.len);
547 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
549 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
553 READ32(lock->lk_old_lock_seqid);
560 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
565 READ32(lockt->lt_type);
566 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
568 READ64(lockt->lt_offset);
569 READ64(lockt->lt_length);
570 COPYMEM(&lockt->lt_clientid, 8);
571 READ32(lockt->lt_owner.len);
572 READ_BUF(lockt->lt_owner.len);
573 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
575 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid))
581 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
585 locku->lu_stateowner = NULL;
587 READ32(locku->lu_type);
588 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
590 READ32(locku->lu_seqid);
591 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
595 READ64(locku->lu_offset);
596 READ64(locku->lu_length);
602 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
607 READ32(lookup->lo_len);
608 READ_BUF(lookup->lo_len);
609 SAVEMEM(lookup->lo_name, lookup->lo_len);
610 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
617 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
621 memset(open->op_bmval, 0, sizeof(open->op_bmval));
622 open->op_iattr.ia_valid = 0;
623 open->op_stateowner = NULL;
625 /* seqid, share_access, share_deny, clientid, ownerlen */
626 READ_BUF(16 + sizeof(clientid_t));
627 READ32(open->op_seqid);
628 READ32(open->op_share_access);
629 READ32(open->op_share_deny);
630 COPYMEM(&open->op_clientid, sizeof(clientid_t));
631 READ32(open->op_owner.len);
633 /* owner, open_flag */
634 READ_BUF(open->op_owner.len + 4);
635 SAVEMEM(open->op_owner.data, open->op_owner.len);
636 READ32(open->op_create);
637 switch (open->op_create) {
638 case NFS4_OPEN_NOCREATE:
640 case NFS4_OPEN_CREATE:
642 READ32(open->op_createmode);
643 switch (open->op_createmode) {
644 case NFS4_CREATE_UNCHECKED:
645 case NFS4_CREATE_GUARDED:
646 status = nfsd4_decode_fattr(argp, open->op_bmval,
647 &open->op_iattr, &open->op_acl);
651 case NFS4_CREATE_EXCLUSIVE:
653 COPYMEM(open->op_verf.data, 8);
655 case NFS4_CREATE_EXCLUSIVE4_1:
656 if (argp->minorversion < 1)
659 COPYMEM(open->op_verf.data, 8);
660 status = nfsd4_decode_fattr(argp, open->op_bmval,
661 &open->op_iattr, &open->op_acl);
675 READ32(open->op_claim_type);
676 switch (open->op_claim_type) {
677 case NFS4_OPEN_CLAIM_NULL:
678 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
680 READ32(open->op_fname.len);
681 READ_BUF(open->op_fname.len);
682 SAVEMEM(open->op_fname.data, open->op_fname.len);
683 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
686 case NFS4_OPEN_CLAIM_PREVIOUS:
688 READ32(open->op_delegate_type);
690 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
691 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
695 READ32(open->op_fname.len);
696 READ_BUF(open->op_fname.len);
697 SAVEMEM(open->op_fname.data, open->op_fname.len);
698 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
709 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
713 open_conf->oc_stateowner = NULL;
714 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
718 READ32(open_conf->oc_seqid);
724 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
728 open_down->od_stateowner = NULL;
729 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
733 READ32(open_down->od_seqid);
734 READ32(open_down->od_share_access);
735 READ32(open_down->od_share_deny);
741 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
746 READ32(putfh->pf_fhlen);
747 if (putfh->pf_fhlen > NFS4_FHSIZE)
749 READ_BUF(putfh->pf_fhlen);
750 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
756 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
760 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
764 READ64(read->rd_offset);
765 READ32(read->rd_length);
771 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
776 READ64(readdir->rd_cookie);
777 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
778 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
779 READ32(readdir->rd_maxcount);
780 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
787 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
792 READ32(remove->rm_namelen);
793 READ_BUF(remove->rm_namelen);
794 SAVEMEM(remove->rm_name, remove->rm_namelen);
795 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
802 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
807 READ32(rename->rn_snamelen);
808 READ_BUF(rename->rn_snamelen + 4);
809 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
810 READ32(rename->rn_tnamelen);
811 READ_BUF(rename->rn_tnamelen);
812 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
813 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
815 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
822 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
826 READ_BUF(sizeof(clientid_t));
827 COPYMEM(clientid, sizeof(clientid_t));
833 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
834 struct nfsd4_secinfo *secinfo)
839 READ32(secinfo->si_namelen);
840 READ_BUF(secinfo->si_namelen);
841 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
842 status = check_filename(secinfo->si_name, secinfo->si_namelen,
850 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
851 struct nfsd4_secinfo_no_name *sin)
856 READ32(sin->sin_style);
861 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
865 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
868 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
873 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
878 COPYMEM(setclientid->se_verf.data, 8);
879 READ32(setclientid->se_namelen);
881 READ_BUF(setclientid->se_namelen + 8);
882 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
883 READ32(setclientid->se_callback_prog);
884 READ32(setclientid->se_callback_netid_len);
886 READ_BUF(setclientid->se_callback_netid_len + 4);
887 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
888 READ32(setclientid->se_callback_addr_len);
890 READ_BUF(setclientid->se_callback_addr_len + 4);
891 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
892 READ32(setclientid->se_callback_ident);
898 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
902 READ_BUF(8 + sizeof(nfs4_verifier));
903 COPYMEM(&scd_c->sc_clientid, 8);
904 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
909 /* Also used for NVERIFY */
911 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
914 struct nfsd4_compoundargs save = {
917 .rqstp = argp->rqstp,
920 struct iattr ve_iattr; /* request */
921 struct nfs4_acl *ve_acl; /* request */
925 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
928 /* For convenience's sake, we compare raw xdr'd attributes in
929 * nfsd4_proc_verify; however we still decode here just to return
930 * correct error in case of bad xdr. */
932 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
933 if (status == nfserr_inval) {
934 status = nfserrno(status);
939 READ32(verify->ve_attrlen);
940 READ_BUF(verify->ve_attrlen);
941 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
947 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
954 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
958 READ64(write->wr_offset);
959 READ32(write->wr_stable_how);
960 if (write->wr_stable_how > 2)
962 READ32(write->wr_buflen);
964 /* Sorry .. no magic macros for this.. *
965 * READ_BUF(write->wr_buflen);
966 * SAVEMEM(write->wr_buf, write->wr_buflen);
968 avail = (char*)argp->end - (char*)argp->p;
969 if (avail + argp->pagelen < write->wr_buflen) {
970 dprintk("NFSD: xdr error (%s:%d)\n",
974 argp->rqstp->rq_vec[0].iov_base = p;
975 argp->rqstp->rq_vec[0].iov_len = avail;
977 len = write->wr_buflen;
978 while (len > argp->rqstp->rq_vec[v].iov_len) {
979 len -= argp->rqstp->rq_vec[v].iov_len;
981 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
983 if (argp->pagelen >= PAGE_SIZE) {
984 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
985 argp->pagelen -= PAGE_SIZE;
987 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
988 argp->pagelen -= len;
991 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
992 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
993 argp->rqstp->rq_vec[v].iov_len = len;
994 write->wr_vlen = v+1;
1000 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1005 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1006 READ32(rlockowner->rl_owner.len);
1007 READ_BUF(rlockowner->rl_owner.len);
1008 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1010 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1011 return nfserr_inval;
1016 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1017 struct nfsd4_exchange_id *exid)
1022 READ_BUF(NFS4_VERIFIER_SIZE);
1023 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1026 READ32(exid->clname.len);
1028 READ_BUF(exid->clname.len);
1029 SAVEMEM(exid->clname.data, exid->clname.len);
1032 READ32(exid->flags);
1034 /* Ignore state_protect4_a */
1036 READ32(exid->spa_how);
1037 switch (exid->spa_how) {
1041 /* spo_must_enforce */
1044 READ_BUF(dummy * 4);
1047 /* spo_must_allow */
1050 READ_BUF(dummy * 4);
1057 READ_BUF(dummy * 4);
1062 READ_BUF(dummy * 4);
1065 /* ssp_hash_algs<> */
1072 p += XDR_QUADLEN(dummy);
1075 /* ssp_encr_algs<> */
1082 p += XDR_QUADLEN(dummy);
1085 /* ssp_window and ssp_num_gss_handles */
1094 /* Ignore Implementation ID */
1095 READ_BUF(4); /* nfs_impl_id4 array length */
1106 p += XDR_QUADLEN(dummy);
1112 p += XDR_QUADLEN(dummy);
1122 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1123 struct nfsd4_create_session *sess)
1133 COPYMEM(&sess->clientid, 8);
1134 READ32(sess->seqid);
1135 READ32(sess->flags);
1137 /* Fore channel attrs */
1139 READ32(dummy); /* headerpadsz is always 0 */
1140 READ32(sess->fore_channel.maxreq_sz);
1141 READ32(sess->fore_channel.maxresp_sz);
1142 READ32(sess->fore_channel.maxresp_cached);
1143 READ32(sess->fore_channel.maxops);
1144 READ32(sess->fore_channel.maxreqs);
1145 READ32(sess->fore_channel.nr_rdma_attrs);
1146 if (sess->fore_channel.nr_rdma_attrs == 1) {
1148 READ32(sess->fore_channel.rdma_attrs);
1149 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1150 dprintk("Too many fore channel attr bitmaps!\n");
1154 /* Back channel attrs */
1156 READ32(dummy); /* headerpadsz is always 0 */
1157 READ32(sess->back_channel.maxreq_sz);
1158 READ32(sess->back_channel.maxresp_sz);
1159 READ32(sess->back_channel.maxresp_cached);
1160 READ32(sess->back_channel.maxops);
1161 READ32(sess->back_channel.maxreqs);
1162 READ32(sess->back_channel.nr_rdma_attrs);
1163 if (sess->back_channel.nr_rdma_attrs == 1) {
1165 READ32(sess->back_channel.rdma_attrs);
1166 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1167 dprintk("Too many back channel attr bitmaps!\n");
1172 READ32(sess->callback_prog);
1174 /* callback_sec_params4 */
1175 READ32(nr_secflavs);
1176 for (i = 0; i < nr_secflavs; ++i) {
1181 /* Nothing to read */
1191 SAVEMEM(machine_name, dummy);
1201 READ_BUF(dummy * 4);
1202 for (i = 0; i < dummy; ++i)
1206 dprintk("RPC_AUTH_GSS callback secflavor "
1207 "not supported!\n");
1211 /* gcbp_handle_from_server */
1214 p += XDR_QUADLEN(dummy);
1215 /* gcbp_handle_from_client */
1219 p += XDR_QUADLEN(dummy);
1222 dprintk("Illegal callback secflavor\n");
1223 return nfserr_inval;
1230 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1231 struct nfsd4_destroy_session *destroy_session)
1234 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1235 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1241 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1242 struct nfsd4_sequence *seq)
1246 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1247 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1249 READ32(seq->slotid);
1250 READ32(seq->maxslots);
1251 READ32(seq->cachethis);
1256 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1261 READ32(rc->rca_one_fs);
1267 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1273 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1275 return nfserr_notsupp;
1278 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1280 static nfsd4_dec nfsd4_dec_ops[] = {
1281 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1282 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1283 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1284 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1285 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1286 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1287 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1288 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1289 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1290 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1291 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1292 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1293 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1294 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1295 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1296 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1297 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1298 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1299 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1300 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1301 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1302 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1303 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1304 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1305 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1306 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1307 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1308 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1309 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1310 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1311 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1312 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1313 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1314 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1315 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1316 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1317 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1320 static nfsd4_dec nfsd41_dec_ops[] = {
1321 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1322 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1323 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1324 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1325 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1326 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1327 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1328 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1329 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1330 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1331 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1332 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1333 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1334 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1335 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1336 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1337 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1338 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1339 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1340 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1341 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1342 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1343 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1344 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1345 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1346 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1347 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1348 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1349 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1350 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1351 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1352 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1353 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1354 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1355 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1356 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1357 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1359 /* new operations for NFSv4.1 */
1360 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp,
1361 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp,
1362 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1363 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1364 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1365 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1366 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1367 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1368 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1369 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1370 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1371 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1372 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1373 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1374 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1375 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp,
1376 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1377 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1378 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1381 struct nfsd4_minorversion_ops {
1382 nfsd4_dec *decoders;
1386 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1387 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1388 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1392 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1395 struct nfsd4_op *op;
1396 struct nfsd4_minorversion_ops *ops;
1400 * XXX: According to spec, we should check the tag
1401 * for UTF-8 compliance. I'm postponing this for
1402 * now because it seems that some clients do use
1406 READ32(argp->taglen);
1407 READ_BUF(argp->taglen + 8);
1408 SAVEMEM(argp->tag, argp->taglen);
1409 READ32(argp->minorversion);
1410 READ32(argp->opcnt);
1412 if (argp->taglen > NFSD4_MAX_TAGLEN)
1414 if (argp->opcnt > 100)
1417 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1418 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1420 argp->ops = argp->iops;
1421 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1426 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1429 ops = &nfsd4_minorversion[argp->minorversion];
1430 for (i = 0; i < argp->opcnt; i++) {
1435 * We can't use READ_BUF() here because we need to handle
1436 * a missing opcode as an OP_WRITE + 1. So we need to check
1437 * to see if we're truly at the end of our buffer or if there
1438 * is another page we need to flip to.
1441 if (argp->p == argp->end) {
1442 if (argp->pagelen < 4) {
1443 /* There isn't an opcode still on the wire */
1444 op->opnum = OP_WRITE + 1;
1445 op->status = nfserr_bad_xdr;
1451 * False alarm. We just hit a page boundary, but there
1452 * is still data available. Move pointer across page
1453 * boundary. *snip from READ_BUF*
1455 argp->p = page_address(argp->pagelist[0]);
1457 if (argp->pagelen < PAGE_SIZE) {
1458 argp->end = argp->p + (argp->pagelen>>2);
1461 argp->end = argp->p + (PAGE_SIZE>>2);
1462 argp->pagelen -= PAGE_SIZE;
1465 op->opnum = ntohl(*argp->p++);
1467 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1468 op->status = ops->decoders[op->opnum](argp, &op->u);
1470 op->opnum = OP_ILLEGAL;
1471 op->status = nfserr_op_illegal;
1483 #define WRITE32(n) *p++ = htonl(n)
1484 #define WRITE64(n) do { \
1485 *p++ = htonl((u32)((n) >> 32)); \
1486 *p++ = htonl((u32)(n)); \
1488 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1489 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1490 memcpy(p, ptr, nbytes); \
1491 p += XDR_QUADLEN(nbytes); \
1494 static void write32(__be32 **p, u32 n)
1499 static void write64(__be32 **p, u64 n)
1501 write32(p, (u32)(n >> 32));
1505 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1507 if (IS_I_VERSION(inode)) {
1508 write64(p, inode->i_version);
1510 write32(p, stat->ctime.tv_sec);
1511 write32(p, stat->ctime.tv_nsec);
1515 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1517 write32(p, c->atomic);
1518 if (c->change_supported) {
1519 write64(p, c->before_change);
1520 write64(p, c->after_change);
1522 write32(p, c->before_ctime_sec);
1523 write32(p, c->before_ctime_nsec);
1524 write32(p, c->after_ctime_sec);
1525 write32(p, c->after_ctime_nsec);
1529 #define RESERVE_SPACE(nbytes) do { \
1531 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1533 #define ADJUST_ARGS() resp->p = p
1536 * Header routine to setup seqid operation replay cache
1538 #define ENCODE_SEQID_OP_HEAD \
1544 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1545 * is where sequence id's are incremented, and the replay cache is filled.
1546 * Note that we increment sequence id's here, at the last moment, so we're sure
1547 * we know whether the error to be returned is a sequence id mutating error.
1550 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1551 if (seqid_mutating_err(nfserr) && stateowner) { \
1552 stateowner->so_seqid++; \
1553 stateowner->so_replay.rp_status = nfserr; \
1554 stateowner->so_replay.rp_buflen = \
1555 (((char *)(resp)->p - (char *)save)); \
1556 memcpy(stateowner->so_replay.rp_buf, save, \
1557 stateowner->so_replay.rp_buflen); \
1560 /* Encode as an array of strings the string given with components
1563 static __be32 nfsd4_encode_components(char sep, char *components,
1564 __be32 **pp, int *buflen)
1568 int strlen, count=0;
1571 dprintk("nfsd4_encode_components(%s)\n", components);
1572 if ((*buflen -= 4) < 0)
1573 return nfserr_resource;
1574 WRITE32(0); /* We will fill this in with @count later */
1575 end = str = components;
1577 for (; *end && (*end != sep); end++)
1578 ; /* Point to end of component */
1581 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1582 return nfserr_resource;
1584 WRITEMEM(str, strlen);
1598 * encode a location element of a fs_locations structure
1600 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1601 __be32 **pp, int *buflen)
1606 status = nfsd4_encode_components(':', location->hosts, &p, buflen);
1609 status = nfsd4_encode_components('/', location->path, &p, buflen);
1617 * Return the path to an export point in the pseudo filesystem namespace
1618 * Returned string is safe to use as long as the caller holds a reference
1621 static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat)
1623 struct svc_fh tmp_fh;
1624 char *path = NULL, *rootpath;
1627 fh_init(&tmp_fh, NFS4_FHSIZE);
1628 *stat = exp_pseudoroot(rqstp, &tmp_fh);
1631 rootpath = tmp_fh.fh_export->ex_pathname;
1633 path = exp->ex_pathname;
1635 rootlen = strlen(rootpath);
1636 if (strncmp(path, rootpath, rootlen)) {
1637 dprintk("nfsd: fs_locations failed;"
1638 "%s is not contained in %s\n", path, rootpath);
1639 *stat = nfserr_notsupp;
1650 * encode a fs_locations structure
1652 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1653 struct svc_export *exp,
1654 __be32 **pp, int *buflen)
1659 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1660 char *root = nfsd4_path(rqstp, exp, &status);
1664 status = nfsd4_encode_components('/', root, &p, buflen);
1667 if ((*buflen -= 4) < 0)
1668 return nfserr_resource;
1669 WRITE32(fslocs->locations_count);
1670 for (i=0; i<fslocs->locations_count; i++) {
1671 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1680 static u32 nfs4_ftypes[16] = {
1681 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1682 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1683 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1684 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1688 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1689 __be32 **p, int *buflen)
1693 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1694 return nfserr_resource;
1695 if (whotype != NFS4_ACL_WHO_NAMED)
1696 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1698 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1700 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1702 return nfserrno(status);
1703 *p = xdr_encode_opaque(*p, NULL, status);
1704 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1705 BUG_ON(*buflen < 0);
1709 static inline __be32
1710 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
1712 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1715 static inline __be32
1716 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
1718 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1721 static inline __be32
1722 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1723 __be32 **p, int *buflen)
1725 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1728 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1729 FATTR4_WORD0_RDATTR_ERROR)
1730 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1732 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1734 /* As per referral draft: */
1735 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1736 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1737 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1738 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1739 *rdattr_err = NFSERR_MOVED;
1741 return nfserr_moved;
1743 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1744 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1749 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1752 * @countp is the buffer size in _words_; upon successful return this becomes
1753 * replaced with the number of words written.
1756 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1757 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
1758 struct svc_rqst *rqstp, int ignore_crossmnt)
1760 u32 bmval0 = bmval[0];
1761 u32 bmval1 = bmval[1];
1762 u32 bmval2 = bmval[2];
1764 struct svc_fh tempfh;
1765 struct kstatfs statfs;
1766 int buflen = *countp << 2;
1775 struct nfs4_acl *acl = NULL;
1776 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1777 u32 minorversion = resp->cstate.minorversion;
1778 struct path path = {
1779 .mnt = exp->ex_path.mnt,
1783 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1784 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
1785 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
1786 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
1788 if (exp->ex_fslocs.migrated) {
1790 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
1795 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
1798 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
1799 FATTR4_WORD0_MAXNAME)) ||
1800 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1801 FATTR4_WORD1_SPACE_TOTAL))) {
1802 err = vfs_statfs(&path, &statfs);
1806 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1807 fh_init(&tempfh, NFS4_FHSIZE);
1808 status = fh_compose(&tempfh, exp, dentry, NULL);
1813 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1814 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1815 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1816 aclsupport = (err == 0);
1817 if (bmval0 & FATTR4_WORD0_ACL) {
1818 if (err == -EOPNOTSUPP)
1819 bmval0 &= ~FATTR4_WORD0_ACL;
1820 else if (err == -EINVAL) {
1821 status = nfserr_attrnotsupp;
1823 } else if (err != 0)
1829 if ((buflen -= 16) < 0)
1835 } else if (bmval1) {
1836 if ((buflen -= 12) < 0)
1842 if ((buflen -= 8) < 0)
1847 attrlenp = p++; /* to be backfilled later */
1849 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1850 u32 word0 = nfsd_suppattrs0(minorversion);
1851 u32 word1 = nfsd_suppattrs1(minorversion);
1852 u32 word2 = nfsd_suppattrs2(minorversion);
1855 word0 &= ~FATTR4_WORD0_ACL;
1857 if ((buflen -= 12) < 0)
1863 if ((buflen -= 16) < 0)
1871 if (bmval0 & FATTR4_WORD0_TYPE) {
1872 if ((buflen -= 4) < 0)
1874 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1875 if (dummy == NF4BAD)
1876 goto out_serverfault;
1879 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1880 if ((buflen -= 4) < 0)
1882 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1883 WRITE32(NFS4_FH_PERSISTENT);
1885 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1887 if (bmval0 & FATTR4_WORD0_CHANGE) {
1888 if ((buflen -= 8) < 0)
1890 write_change(&p, &stat, dentry->d_inode);
1892 if (bmval0 & FATTR4_WORD0_SIZE) {
1893 if ((buflen -= 8) < 0)
1897 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1898 if ((buflen -= 4) < 0)
1902 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1903 if ((buflen -= 4) < 0)
1907 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1908 if ((buflen -= 4) < 0)
1912 if (bmval0 & FATTR4_WORD0_FSID) {
1913 if ((buflen -= 16) < 0)
1915 if (exp->ex_fslocs.migrated) {
1916 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
1917 WRITE64(NFS4_REFERRAL_FSID_MINOR);
1918 } else switch(fsid_source(fhp)) {
1919 case FSIDSOURCE_FSID:
1920 WRITE64((u64)exp->ex_fsid);
1923 case FSIDSOURCE_DEV:
1925 WRITE32(MAJOR(stat.dev));
1927 WRITE32(MINOR(stat.dev));
1929 case FSIDSOURCE_UUID:
1930 WRITEMEM(exp->ex_uuid, 16);
1934 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1935 if ((buflen -= 4) < 0)
1939 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1940 if ((buflen -= 4) < 0)
1942 WRITE32(nfsd4_lease);
1944 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1945 if ((buflen -= 4) < 0)
1947 WRITE32(rdattr_err);
1949 if (bmval0 & FATTR4_WORD0_ACL) {
1950 struct nfs4_ace *ace;
1953 if ((buflen -= 4) < 0)
1959 if ((buflen -= 4) < 0)
1961 WRITE32(acl->naces);
1963 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
1964 if ((buflen -= 4*3) < 0)
1968 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1969 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1970 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1972 if (status == nfserr_resource)
1979 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1980 if ((buflen -= 4) < 0)
1982 WRITE32(aclsupport ?
1983 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1985 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1986 if ((buflen -= 4) < 0)
1990 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1991 if ((buflen -= 4) < 0)
1995 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1996 if ((buflen -= 4) < 0)
2000 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2001 if ((buflen -= 4) < 0)
2005 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2006 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2009 WRITE32(fhp->fh_handle.fh_size);
2010 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2012 if (bmval0 & FATTR4_WORD0_FILEID) {
2013 if ((buflen -= 8) < 0)
2017 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2018 if ((buflen -= 8) < 0)
2020 WRITE64((u64) statfs.f_ffree);
2022 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2023 if ((buflen -= 8) < 0)
2025 WRITE64((u64) statfs.f_ffree);
2027 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2028 if ((buflen -= 8) < 0)
2030 WRITE64((u64) statfs.f_files);
2032 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2033 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2034 if (status == nfserr_resource)
2039 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2040 if ((buflen -= 4) < 0)
2044 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2045 if ((buflen -= 8) < 0)
2049 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2050 if ((buflen -= 4) < 0)
2054 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2055 if ((buflen -= 4) < 0)
2057 WRITE32(statfs.f_namelen);
2059 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2060 if ((buflen -= 8) < 0)
2062 WRITE64((u64) svc_max_payload(rqstp));
2064 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2065 if ((buflen -= 8) < 0)
2067 WRITE64((u64) svc_max_payload(rqstp));
2069 if (bmval1 & FATTR4_WORD1_MODE) {
2070 if ((buflen -= 4) < 0)
2072 WRITE32(stat.mode & S_IALLUGO);
2074 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2075 if ((buflen -= 4) < 0)
2079 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2080 if ((buflen -= 4) < 0)
2082 WRITE32(stat.nlink);
2084 if (bmval1 & FATTR4_WORD1_OWNER) {
2085 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2086 if (status == nfserr_resource)
2091 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2092 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2093 if (status == nfserr_resource)
2098 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2099 if ((buflen -= 8) < 0)
2101 WRITE32((u32) MAJOR(stat.rdev));
2102 WRITE32((u32) MINOR(stat.rdev));
2104 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2105 if ((buflen -= 8) < 0)
2107 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2110 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2111 if ((buflen -= 8) < 0)
2113 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2116 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2117 if ((buflen -= 8) < 0)
2119 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2122 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2123 if ((buflen -= 8) < 0)
2125 dummy64 = (u64)stat.blocks << 9;
2128 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2129 if ((buflen -= 12) < 0)
2132 WRITE32(stat.atime.tv_sec);
2133 WRITE32(stat.atime.tv_nsec);
2135 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2136 if ((buflen -= 12) < 0)
2142 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2143 if ((buflen -= 12) < 0)
2146 WRITE32(stat.ctime.tv_sec);
2147 WRITE32(stat.ctime.tv_nsec);
2149 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2150 if ((buflen -= 12) < 0)
2153 WRITE32(stat.mtime.tv_sec);
2154 WRITE32(stat.mtime.tv_nsec);
2156 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2157 if ((buflen -= 8) < 0)
2160 * Get parent's attributes if not ignoring crossmount
2161 * and this is the root of a cross-mounted filesystem.
2163 if (ignore_crossmnt == 0 &&
2164 dentry == exp->ex_path.mnt->mnt_root) {
2165 struct path path = exp->ex_path;
2167 while (follow_up(&path)) {
2168 if (path.dentry != path.mnt->mnt_root)
2171 err = vfs_getattr(path.mnt, path.dentry, &stat);
2178 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2180 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2181 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2182 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2185 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2186 *countp = p - buffer;
2195 status = nfserrno(err);
2199 status = nfserr_resource;
2202 status = nfserr_serverfault;
2206 static inline int attributes_need_mount(u32 *bmval)
2208 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2210 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2216 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2217 const char *name, int namlen, __be32 *p, int *buflen)
2219 struct svc_export *exp = cd->rd_fhp->fh_export;
2220 struct dentry *dentry;
2222 int ignore_crossmnt = 0;
2224 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2226 return nfserrno(PTR_ERR(dentry));
2227 if (!dentry->d_inode) {
2229 * nfsd_buffered_readdir drops the i_mutex between
2230 * readdir and calling this callback, leaving a window
2231 * where this directory entry could have gone away.
2234 return nfserr_noent;
2239 * In the case of a mountpoint, the client may be asking for
2240 * attributes that are only properties of the underlying filesystem
2241 * as opposed to the cross-mounted file system. In such a case,
2242 * we will not follow the cross mount and will fill the attribtutes
2243 * directly from the mountpoint dentry.
2245 if (nfsd_mountpoint(dentry, exp)) {
2248 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2249 && !attributes_need_mount(cd->rd_bmval)) {
2250 ignore_crossmnt = 1;
2254 * Why the heck aren't we just using nfsd_lookup??
2255 * Different "."/".." handling? Something else?
2256 * At least, add a comment here to explain....
2258 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2260 nfserr = nfserrno(err);
2263 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2269 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2270 cd->rd_rqstp, ignore_crossmnt);
2278 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2285 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2286 *p++ = htonl(0); /* bmval1 */
2289 *p++ = nfserr; /* no htonl */
2290 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2295 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2296 loff_t offset, u64 ino, unsigned int d_type)
2298 struct readdir_cd *ccd = ccdv;
2299 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2301 __be32 *p = cd->buffer;
2303 __be32 nfserr = nfserr_toosmall;
2305 /* In nfsv4, "." and ".." never make it onto the wire.. */
2306 if (name && isdotent(name, namlen)) {
2307 cd->common.err = nfs_ok;
2312 xdr_encode_hyper(cd->offset, (u64) offset);
2314 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2318 *p++ = xdr_one; /* mark entry present */
2320 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2321 p = xdr_encode_array(p, name, namlen); /* name length & name */
2323 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2328 case nfserr_resource:
2329 nfserr = nfserr_toosmall;
2337 * If the client requested the RDATTR_ERROR attribute,
2338 * we stuff the error code into this attribute
2339 * and continue. If this attribute was not requested,
2340 * then in accordance with the spec, we fail the
2341 * entire READDIR operation(!)
2343 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2345 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2347 nfserr = nfserr_toosmall;
2351 cd->buflen -= (p - cd->buffer);
2353 cd->offset = cookiep;
2355 cd->common.err = nfs_ok;
2358 cd->common.err = nfserr;
2363 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2367 RESERVE_SPACE(sizeof(stateid_t));
2368 WRITE32(sid->si_generation);
2369 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2374 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2380 WRITE32(access->ac_supported);
2381 WRITE32(access->ac_resp_access);
2388 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2390 ENCODE_SEQID_OP_HEAD;
2393 nfsd4_encode_stateid(resp, &close->cl_stateid);
2395 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
2401 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2407 WRITEMEM(commit->co_verf.data, 8);
2414 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2420 write_cinfo(&p, &create->cr_cinfo);
2422 WRITE32(create->cr_bmval[0]);
2423 WRITE32(create->cr_bmval[1]);
2430 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2432 struct svc_fh *fhp = getattr->ga_fhp;
2438 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2439 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2440 resp->p, &buflen, getattr->ga_bmval,
2448 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2450 struct svc_fh *fhp = *fhpp;
2455 len = fhp->fh_handle.fh_size;
2456 RESERVE_SPACE(len + 4);
2458 WRITEMEM(&fhp->fh_handle.fh_base, len);
2465 * Including all fields other than the name, a LOCK4denied structure requires
2466 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2469 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2473 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
2474 WRITE64(ld->ld_start);
2475 WRITE64(ld->ld_length);
2476 WRITE32(ld->ld_type);
2478 WRITEMEM(&ld->ld_clientid, 8);
2479 WRITE32(ld->ld_sop->so_owner.len);
2480 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
2481 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
2482 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2483 WRITE64((u64)0); /* clientid */
2484 WRITE32(0); /* length of owner name */
2490 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2492 ENCODE_SEQID_OP_HEAD;
2495 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2496 else if (nfserr == nfserr_denied)
2497 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2499 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
2504 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2506 if (nfserr == nfserr_denied)
2507 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2512 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2514 ENCODE_SEQID_OP_HEAD;
2517 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2519 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
2525 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2531 write_cinfo(&p, &link->li_cinfo);
2539 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2542 ENCODE_SEQID_OP_HEAD;
2547 nfsd4_encode_stateid(resp, &open->op_stateid);
2549 write_cinfo(&p, &open->op_cinfo);
2550 WRITE32(open->op_rflags);
2552 WRITE32(open->op_bmval[0]);
2553 WRITE32(open->op_bmval[1]);
2554 WRITE32(open->op_delegate_type);
2557 switch (open->op_delegate_type) {
2558 case NFS4_OPEN_DELEGATE_NONE:
2560 case NFS4_OPEN_DELEGATE_READ:
2561 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2563 WRITE32(open->op_recall);
2566 * TODO: ACE's in delegations
2568 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2571 WRITE32(0); /* XXX: is NULL principal ok? */
2574 case NFS4_OPEN_DELEGATE_WRITE:
2575 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2580 * TODO: space_limit's in delegations
2582 WRITE32(NFS4_LIMIT_SIZE);
2587 * TODO: ACE's in delegations
2589 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2592 WRITE32(0); /* XXX: is NULL principal ok? */
2598 /* XXX save filehandle here */
2600 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2605 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2607 ENCODE_SEQID_OP_HEAD;
2610 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2612 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2617 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2619 ENCODE_SEQID_OP_HEAD;
2622 nfsd4_encode_stateid(resp, &od->od_stateid);
2624 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2629 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2630 struct nfsd4_read *read)
2634 unsigned long maxcount;
2640 if (resp->xbuf->page_len)
2641 return nfserr_resource;
2643 RESERVE_SPACE(8); /* eof flag and byte count */
2645 maxcount = svc_max_payload(resp->rqstp);
2646 if (maxcount > read->rd_length)
2647 maxcount = read->rd_length;
2652 pn = resp->rqstp->rq_resused++;
2653 resp->rqstp->rq_vec[v].iov_base =
2654 page_address(resp->rqstp->rq_respages[pn]);
2655 resp->rqstp->rq_vec[v].iov_len =
2656 len < PAGE_SIZE ? len : PAGE_SIZE;
2662 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2663 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2666 if (nfserr == nfserr_symlink)
2667 nfserr = nfserr_inval;
2670 eof = (read->rd_offset + maxcount >=
2671 read->rd_fhp->fh_dentry->d_inode->i_size);
2676 resp->xbuf->head[0].iov_len = (char*)p
2677 - (char*)resp->xbuf->head[0].iov_base;
2678 resp->xbuf->page_len = maxcount;
2680 /* Use rest of head for padding and remaining ops: */
2681 resp->xbuf->tail[0].iov_base = p;
2682 resp->xbuf->tail[0].iov_len = 0;
2686 resp->xbuf->tail[0].iov_base += maxcount&3;
2687 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2694 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2702 if (resp->xbuf->page_len)
2703 return nfserr_resource;
2705 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2707 maxcount = PAGE_SIZE;
2711 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2712 * if they would overflow the buffer. Is this kosher in NFSv4? If
2713 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2714 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2716 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2717 if (nfserr == nfserr_isdir)
2718 return nfserr_inval;
2724 resp->xbuf->head[0].iov_len = (char*)p
2725 - (char*)resp->xbuf->head[0].iov_base;
2726 resp->xbuf->page_len = maxcount;
2728 /* Use rest of head for padding and remaining ops: */
2729 resp->xbuf->tail[0].iov_base = p;
2730 resp->xbuf->tail[0].iov_len = 0;
2734 resp->xbuf->tail[0].iov_base += maxcount&3;
2735 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2742 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
2746 __be32 *page, *savep, *tailbase;
2751 if (resp->xbuf->page_len)
2752 return nfserr_resource;
2754 RESERVE_SPACE(8); /* verifier */
2757 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2761 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2764 maxcount = PAGE_SIZE;
2765 if (maxcount > readdir->rd_maxcount)
2766 maxcount = readdir->rd_maxcount;
2769 * Convert from bytes to words, account for the two words already
2770 * written, make sure to leave two words at the end for the next
2771 * pointer and eof field.
2773 maxcount = (maxcount >> 2) - 4;
2775 nfserr = nfserr_toosmall;
2779 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
2780 readdir->common.err = 0;
2781 readdir->buflen = maxcount;
2782 readdir->buffer = page;
2783 readdir->offset = NULL;
2785 offset = readdir->rd_cookie;
2786 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2788 &readdir->common, nfsd4_encode_dirent);
2789 if (nfserr == nfs_ok &&
2790 readdir->common.err == nfserr_toosmall &&
2791 readdir->buffer == page)
2792 nfserr = nfserr_toosmall;
2793 if (nfserr == nfserr_symlink)
2794 nfserr = nfserr_notdir;
2798 if (readdir->offset)
2799 xdr_encode_hyper(readdir->offset, offset);
2801 p = readdir->buffer;
2802 *p++ = 0; /* no more entries */
2803 *p++ = htonl(readdir->common.err == nfserr_eof);
2804 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
2805 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2807 /* Use rest of head for padding and remaining ops: */
2808 resp->xbuf->tail[0].iov_base = tailbase;
2809 resp->xbuf->tail[0].iov_len = 0;
2810 resp->p = resp->xbuf->tail[0].iov_base;
2811 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2821 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
2827 write_cinfo(&p, &remove->rm_cinfo);
2834 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
2840 write_cinfo(&p, &rename->rn_sinfo);
2841 write_cinfo(&p, &rename->rn_tinfo);
2848 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
2849 struct nfsd4_secinfo *secinfo)
2852 struct svc_export *exp = secinfo->si_exp;
2854 struct exp_flavor_info *flavs;
2855 struct exp_flavor_info def_flavs[2];
2860 if (exp->ex_nflavors) {
2861 flavs = exp->ex_flavors;
2862 nflavs = exp->ex_nflavors;
2863 } else { /* Handling of some defaults in absence of real secinfo: */
2865 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
2867 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
2868 flavs[1].pseudoflavor = RPC_AUTH_NULL;
2869 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
2871 flavs[0].pseudoflavor
2872 = svcauth_gss_flavor(exp->ex_client);
2875 flavs[0].pseudoflavor
2876 = exp->ex_client->flavour->flavour;
2883 for (i = 0; i < nflavs; i++) {
2884 u32 flav = flavs[i].pseudoflavor;
2885 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
2889 WRITE32(RPC_AUTH_GSS);
2891 RESERVE_SPACE(4 + gm->gm_oid.len);
2892 WRITE32(gm->gm_oid.len);
2893 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
2896 WRITE32(0); /* qop */
2899 WRITE32(gss_pseudoflavor_to_service(gm, flav));
2915 * The SETATTR encode routine is special -- it always encodes a bitmap,
2916 * regardless of the error status.
2919 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
2931 WRITE32(setattr->sa_bmval[0]);
2932 WRITE32(setattr->sa_bmval[1]);
2939 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
2944 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2945 WRITEMEM(&scd->se_clientid, 8);
2946 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2949 else if (nfserr == nfserr_clid_inuse) {
2959 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
2965 WRITE32(write->wr_bytes_written);
2966 WRITE32(write->wr_how_written);
2967 WRITEMEM(write->wr_verifier.data, 8);
2974 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr,
2975 struct nfsd4_exchange_id *exid)
2981 int server_scope_sz;
2982 uint64_t minor_id = 0;
2987 major_id = utsname()->nodename;
2988 major_id_sz = strlen(major_id);
2989 server_scope = utsname()->nodename;
2990 server_scope_sz = strlen(server_scope);
2993 8 /* eir_clientid */ +
2994 4 /* eir_sequenceid */ +
2996 4 /* spr_how (SP4_NONE) */ +
2997 8 /* so_minor_id */ +
2998 4 /* so_major_id.len */ +
2999 (XDR_QUADLEN(major_id_sz) * 4) +
3000 4 /* eir_server_scope.len */ +
3001 (XDR_QUADLEN(server_scope_sz) * 4) +
3002 4 /* eir_server_impl_id.count (0) */);
3004 WRITEMEM(&exid->clientid, 8);
3005 WRITE32(exid->seqid);
3006 WRITE32(exid->flags);
3008 /* state_protect4_r. Currently only support SP4_NONE */
3009 BUG_ON(exid->spa_how != SP4_NONE);
3010 WRITE32(exid->spa_how);
3012 /* The server_owner struct */
3013 WRITE64(minor_id); /* Minor id */
3015 WRITE32(major_id_sz);
3016 WRITEMEM(major_id, major_id_sz);
3019 WRITE32(server_scope_sz);
3020 WRITEMEM(server_scope, server_scope_sz);
3022 /* Implementation id */
3023 WRITE32(0); /* zero length nfs_impl_id4 array */
3029 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr,
3030 struct nfsd4_create_session *sess)
3038 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3039 WRITE32(sess->seqid);
3040 WRITE32(sess->flags);
3044 WRITE32(0); /* headerpadsz */
3045 WRITE32(sess->fore_channel.maxreq_sz);
3046 WRITE32(sess->fore_channel.maxresp_sz);
3047 WRITE32(sess->fore_channel.maxresp_cached);
3048 WRITE32(sess->fore_channel.maxops);
3049 WRITE32(sess->fore_channel.maxreqs);
3050 WRITE32(sess->fore_channel.nr_rdma_attrs);
3053 if (sess->fore_channel.nr_rdma_attrs) {
3055 WRITE32(sess->fore_channel.rdma_attrs);
3060 WRITE32(0); /* headerpadsz */
3061 WRITE32(sess->back_channel.maxreq_sz);
3062 WRITE32(sess->back_channel.maxresp_sz);
3063 WRITE32(sess->back_channel.maxresp_cached);
3064 WRITE32(sess->back_channel.maxops);
3065 WRITE32(sess->back_channel.maxreqs);
3066 WRITE32(sess->back_channel.nr_rdma_attrs);
3069 if (sess->back_channel.nr_rdma_attrs) {
3071 WRITE32(sess->back_channel.rdma_attrs);
3078 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr,
3079 struct nfsd4_destroy_session *destroy_session)
3085 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr,
3086 struct nfsd4_sequence *seq)
3093 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3094 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3095 WRITE32(seq->seqid);
3096 WRITE32(seq->slotid);
3097 WRITE32(seq->maxslots);
3100 * target_maxslots = maxslots
3103 WRITE32(seq->maxslots);
3107 resp->cstate.datap = p; /* DRC cache data pointer */
3112 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3117 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3120 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3121 * since we don't need to filter out obsolete ops as this is
3122 * done in the decoding phase.
3124 static nfsd4_enc nfsd4_enc_ops[] = {
3125 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3126 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3127 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3128 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3129 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3130 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3131 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3132 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3133 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3134 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3135 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3136 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3137 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3138 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3139 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3140 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3141 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3142 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3143 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3144 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3145 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3146 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3147 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3148 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3149 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3150 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3151 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3152 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3153 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3154 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3155 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3156 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3157 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3158 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3159 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3160 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3161 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3163 /* NFSv4.1 operations */
3164 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3165 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3166 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3167 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3168 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3169 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3170 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3171 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3172 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3173 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3174 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3175 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3176 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo,
3177 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3178 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3179 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3180 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3181 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3182 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3186 * Calculate the total amount of memory that the compound response has taken
3187 * after encoding the current operation.
3189 * pad: add on 8 bytes for the next operation's op_code and status so that
3190 * there is room to cache a failure on the next operation.
3192 * Compare this length to the session se_fmaxresp_cached.
3194 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3195 * will be at least a page and will therefore hold the xdr_buf head.
3197 static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp)
3200 struct xdr_buf *xb = &resp->rqstp->rq_res;
3201 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp;
3202 struct nfsd4_session *session = NULL;
3203 struct nfsd4_slot *slot = resp->cstate.slot;
3204 u32 length, tlen = 0, pad = 8;
3206 if (!nfsd4_has_session(&resp->cstate))
3209 session = resp->cstate.session;
3210 if (session == NULL || slot->sl_cachethis == 0)
3213 if (resp->opcnt >= args->opcnt)
3214 pad = 0; /* this is the last operation */
3216 if (xb->page_len == 0) {
3217 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3219 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3220 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3222 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3224 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3225 length, xb->page_len, tlen, pad);
3227 if (length <= session->se_fchannel.maxresp_cached)
3230 return nfserr_rep_too_big_to_cache;
3234 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3241 statp = p++; /* to be backfilled at the end */
3244 if (op->opnum == OP_ILLEGAL)
3246 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3247 !nfsd4_enc_ops[op->opnum]);
3248 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3249 /* nfsd4_check_drc_limit guarantees enough room for error status */
3250 if (!op->status && nfsd4_check_drc_limit(resp))
3251 op->status = nfserr_rep_too_big_to_cache;
3254 * Note: We write the status directly, instead of using WRITE32(),
3255 * since it is already in network byte order.
3257 *statp = op->status;
3261 * Encode the reply stored in the stateowner reply cache
3263 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3264 * previously sent already encoded operation.
3266 * called with nfs4_lock_state() held
3269 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3272 struct nfs4_replay *rp = op->replay;
3278 *p++ = rp->rp_status; /* already xdr'ed */
3281 RESERVE_SPACE(rp->rp_buflen);
3282 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3287 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3289 return xdr_ressize_check(rqstp, p);
3292 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
3294 if (args->ops != args->iops) {
3296 args->ops = args->iops;
3300 while (args->to_free) {
3301 struct tmpbuf *tb = args->to_free;
3302 args->to_free = tb->next;
3303 tb->release(tb->buf);
3309 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3314 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3315 args->pagelist = rqstp->rq_arg.pages;
3316 args->pagelen = rqstp->rq_arg.page_len;
3318 args->to_free = NULL;
3319 args->ops = args->iops;
3320 args->rqstp = rqstp;
3322 status = nfsd4_decode_compound(args);
3324 nfsd4_release_compoundargs(args);
3330 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3333 * All that remains is to write the tag and operation count...
3335 struct nfsd4_compound_state *cs = &resp->cstate;
3338 *p++ = htonl(resp->taglen);
3339 memcpy(p, resp->tag, resp->taglen);
3340 p += XDR_QUADLEN(resp->taglen);
3341 *p++ = htonl(resp->opcnt);
3343 if (rqstp->rq_res.page_len)
3344 iov = &rqstp->rq_res.tail[0];
3346 iov = &rqstp->rq_res.head[0];
3347 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3348 BUG_ON(iov->iov_len > PAGE_SIZE);
3349 if (nfsd4_has_session(cs)) {
3350 if (cs->status != nfserr_replay_cache) {
3351 nfsd4_store_cache_entry(resp);
3352 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__);
3353 cs->slot->sl_inuse = false;
3355 /* Renew the clientid on success and on replay */
3356 release_session_client(cs->session);
3357 nfsd4_put_session(cs->session);