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/pagemap.h>
48 #include <linux/sunrpc/svcauth_gss.h>
58 #define NFSDDBG_FACILITY NFSDDBG_XDR
61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
62 * directory in order to indicate to the client that a filesystem boundary is present
63 * We use a fixed fsid for a referral
65 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
66 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
69 check_filename(char *str, int len)
75 if (isdotent(str, len))
76 return nfserr_badname;
77 for (i = 0; i < len; i++)
79 return nfserr_badname;
91 dprintk("NFSD: xdr error (%s:%d)\n", \
92 __FILE__, __LINE__); \
93 status = nfserr_bad_xdr; \
96 #define READ32(x) (x) = ntohl(*p++)
97 #define READ64(x) do { \
98 (x) = (u64)ntohl(*p++) << 32; \
101 #define READTIME(x) do { \
106 #define READMEM(x,nbytes) do { \
108 p += XDR_QUADLEN(nbytes); \
110 #define SAVEMEM(x,nbytes) do { \
111 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
112 savemem(argp, p, nbytes) : \
114 dprintk("NFSD: xdr error (%s:%d)\n", \
115 __FILE__, __LINE__); \
118 p += XDR_QUADLEN(nbytes); \
120 #define COPYMEM(x,nbytes) do { \
121 memcpy((x), p, nbytes); \
122 p += XDR_QUADLEN(nbytes); \
125 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
126 #define READ_BUF(nbytes) do { \
127 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
129 argp->p += XDR_QUADLEN(nbytes); \
130 } else if (!(p = read_buf(argp, nbytes))) { \
131 dprintk("NFSD: xdr error (%s:%d)\n", \
132 __FILE__, __LINE__); \
137 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
139 /* We want more bytes than seem to be available.
140 * Maybe we need a new page, maybe we have just run out
142 unsigned int avail = (char *)argp->end - (char *)argp->p;
144 if (avail + argp->pagelen < nbytes)
146 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
148 /* ok, we can do it with the current plus the next page */
149 if (nbytes <= sizeof(argp->tmp))
153 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
159 * The following memcpy is safe because read_buf is always
160 * called with nbytes > avail, and the two cases above both
161 * guarantee p points to at least nbytes bytes.
163 memcpy(p, argp->p, avail);
164 /* step to next page */
165 argp->p = page_address(argp->pagelist[0]);
167 if (argp->pagelen < PAGE_SIZE) {
168 argp->end = argp->p + (argp->pagelen>>2);
171 argp->end = argp->p + (PAGE_SIZE>>2);
172 argp->pagelen -= PAGE_SIZE;
174 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
175 argp->p += XDR_QUADLEN(nbytes - avail);
179 static int zero_clientid(clientid_t *clid)
181 return (clid->cl_boot == 0) && (clid->cl_id == 0);
185 defer_free(struct nfsd4_compoundargs *argp,
186 void (*release)(const void *), void *p)
190 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
194 tb->release = release;
195 tb->next = argp->to_free;
200 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
202 if (p == argp->tmp) {
203 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
207 BUG_ON(p != argp->tmpp);
210 if (defer_free(argp, kfree, p)) {
218 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
232 READ_BUF(bmlen << 2);
244 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
245 struct iattr *iattr, struct nfs4_acl **acl)
247 int expected_len, len = 0;
254 if ((status = nfsd4_decode_bitmap(argp, bmval)))
258 READ32(expected_len);
260 if (bmval[0] & FATTR4_WORD0_SIZE) {
263 READ64(iattr->ia_size);
264 iattr->ia_valid |= ATTR_SIZE;
266 if (bmval[0] & FATTR4_WORD0_ACL) {
268 struct nfs4_ace *ace;
270 READ_BUF(4); len += 4;
273 if (nace > NFS4_ACL_MAX)
274 return nfserr_resource;
276 *acl = nfs4_acl_new(nace);
281 defer_free(argp, kfree, *acl);
283 (*acl)->naces = nace;
284 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
285 READ_BUF(16); len += 16;
288 READ32(ace->access_mask);
291 len += XDR_QUADLEN(dummy32) << 2;
292 READMEM(buf, dummy32);
293 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
295 if (ace->whotype != NFS4_ACL_WHO_NAMED)
297 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
298 status = nfsd_map_name_to_gid(argp->rqstp,
299 buf, dummy32, &ace->who_gid);
301 status = nfsd_map_name_to_uid(argp->rqstp,
302 buf, dummy32, &ace->who_uid);
308 if (bmval[1] & FATTR4_WORD1_MODE) {
311 READ32(iattr->ia_mode);
312 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
313 iattr->ia_valid |= ATTR_MODE;
315 if (bmval[1] & FATTR4_WORD1_OWNER) {
320 len += (XDR_QUADLEN(dummy32) << 2);
321 READMEM(buf, dummy32);
322 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
324 iattr->ia_valid |= ATTR_UID;
326 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
331 len += (XDR_QUADLEN(dummy32) << 2);
332 READMEM(buf, dummy32);
333 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
335 iattr->ia_valid |= ATTR_GID;
337 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
342 case NFS4_SET_TO_CLIENT_TIME:
343 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
344 all 32 bits of 'nseconds'. */
350 READ32(iattr->ia_atime.tv_sec);
351 READ32(iattr->ia_atime.tv_nsec);
352 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
354 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
356 case NFS4_SET_TO_SERVER_TIME:
357 iattr->ia_valid |= ATTR_ATIME;
363 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
368 case NFS4_SET_TO_CLIENT_TIME:
369 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
370 all 32 bits of 'nseconds'. */
376 READ32(iattr->ia_mtime.tv_sec);
377 READ32(iattr->ia_mtime.tv_nsec);
378 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
380 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
382 case NFS4_SET_TO_SERVER_TIME:
383 iattr->ia_valid |= ATTR_MTIME;
389 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
390 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
391 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
392 READ_BUF(expected_len - len);
393 else if (len != expected_len)
399 status = nfserrno(host_err);
404 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
408 READ_BUF(sizeof(stateid_t));
409 READ32(sid->si_generation);
410 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
416 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
421 READ32(access->ac_req_access);
426 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
434 /* callback_sec_params4 */
437 cbs->flavor = (u32)(-1);
438 for (i = 0; i < nr_secflavs; ++i) {
443 /* Nothing to read */
444 if (cbs->flavor == (u32)(-1))
445 cbs->flavor = RPC_AUTH_NULL;
455 SAVEMEM(machine_name, dummy);
466 if (cbs->flavor == (u32)(-1)) {
467 kuid_t kuid = make_kuid(&init_user_ns, uid);
468 kgid_t kgid = make_kgid(&init_user_ns, gid);
469 if (uid_valid(kuid) && gid_valid(kgid)) {
472 cbs->flavor = RPC_AUTH_UNIX;
474 dprintk("RPC_AUTH_UNIX with invalid"
475 "uid or gid ignoring!\n");
480 dprintk("RPC_AUTH_GSS callback secflavor "
485 /* gcbp_handle_from_server */
488 p += XDR_QUADLEN(dummy);
489 /* gcbp_handle_from_client */
495 dprintk("Illegal callback secflavor\n");
502 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
507 READ32(bc->bc_cb_program);
508 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
513 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
517 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
518 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
520 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
521 * could help us figure out we should be using it. */
526 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
531 READ32(close->cl_seqid);
532 return nfsd4_decode_stateid(argp, &close->cl_stateid);
539 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
544 READ64(commit->co_offset);
545 READ32(commit->co_count);
551 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
556 READ32(create->cr_type);
557 switch (create->cr_type) {
560 READ32(create->cr_linklen);
561 READ_BUF(create->cr_linklen);
562 SAVEMEM(create->cr_linkname, create->cr_linklen);
567 READ32(create->cr_specdata1);
568 READ32(create->cr_specdata2);
578 READ32(create->cr_namelen);
579 READ_BUF(create->cr_namelen);
580 SAVEMEM(create->cr_name, create->cr_namelen);
581 if ((status = check_filename(create->cr_name, create->cr_namelen)))
584 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
593 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
595 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
599 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
601 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
605 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
610 READ32(link->li_namelen);
611 READ_BUF(link->li_namelen);
612 SAVEMEM(link->li_name, link->li_namelen);
613 if ((status = check_filename(link->li_name, link->li_namelen)))
620 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
625 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
628 READ32(lock->lk_type);
629 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
631 READ32(lock->lk_reclaim);
632 READ64(lock->lk_offset);
633 READ64(lock->lk_length);
634 READ32(lock->lk_is_new);
636 if (lock->lk_is_new) {
638 READ32(lock->lk_new_open_seqid);
639 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
642 READ_BUF(8 + sizeof(clientid_t));
643 READ32(lock->lk_new_lock_seqid);
644 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
645 READ32(lock->lk_new_owner.len);
646 READ_BUF(lock->lk_new_owner.len);
647 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
649 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
653 READ32(lock->lk_old_lock_seqid);
660 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
665 READ32(lockt->lt_type);
666 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
668 READ64(lockt->lt_offset);
669 READ64(lockt->lt_length);
670 COPYMEM(&lockt->lt_clientid, 8);
671 READ32(lockt->lt_owner.len);
672 READ_BUF(lockt->lt_owner.len);
673 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
679 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
684 READ32(locku->lu_type);
685 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
687 READ32(locku->lu_seqid);
688 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
692 READ64(locku->lu_offset);
693 READ64(locku->lu_length);
699 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
704 READ32(lookup->lo_len);
705 READ_BUF(lookup->lo_len);
706 SAVEMEM(lookup->lo_name, lookup->lo_len);
707 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
713 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
720 *share_access = w & NFS4_SHARE_ACCESS_MASK;
721 *deleg_want = w & NFS4_SHARE_WANT_MASK;
723 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
725 switch (w & NFS4_SHARE_ACCESS_MASK) {
726 case NFS4_SHARE_ACCESS_READ:
727 case NFS4_SHARE_ACCESS_WRITE:
728 case NFS4_SHARE_ACCESS_BOTH:
731 return nfserr_bad_xdr;
733 w &= ~NFS4_SHARE_ACCESS_MASK;
736 if (!argp->minorversion)
737 return nfserr_bad_xdr;
738 switch (w & NFS4_SHARE_WANT_MASK) {
739 case NFS4_SHARE_WANT_NO_PREFERENCE:
740 case NFS4_SHARE_WANT_READ_DELEG:
741 case NFS4_SHARE_WANT_WRITE_DELEG:
742 case NFS4_SHARE_WANT_ANY_DELEG:
743 case NFS4_SHARE_WANT_NO_DELEG:
744 case NFS4_SHARE_WANT_CANCEL:
747 return nfserr_bad_xdr;
749 w &= ~NFS4_SHARE_WANT_MASK;
753 if (!deleg_when) /* open_downgrade */
756 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
757 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
758 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
759 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
763 return nfserr_bad_xdr;
766 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
772 /* Note: unlinke access bits, deny bits may be zero. */
773 if (*x & ~NFS4_SHARE_DENY_BOTH)
774 return nfserr_bad_xdr;
777 return nfserr_bad_xdr;
780 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
787 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
788 return nfserr_bad_xdr;
791 SAVEMEM(o->data, o->len);
794 return nfserr_bad_xdr;
798 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
803 memset(open->op_bmval, 0, sizeof(open->op_bmval));
804 open->op_iattr.ia_valid = 0;
805 open->op_openowner = NULL;
807 /* seqid, share_access, share_deny, clientid, ownerlen */
809 READ32(open->op_seqid);
810 /* decode, yet ignore deleg_when until supported */
811 status = nfsd4_decode_share_access(argp, &open->op_share_access,
812 &open->op_deleg_want, &dummy);
815 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
818 READ_BUF(sizeof(clientid_t));
819 COPYMEM(&open->op_clientid, sizeof(clientid_t));
820 status = nfsd4_decode_opaque(argp, &open->op_owner);
824 READ32(open->op_create);
825 switch (open->op_create) {
826 case NFS4_OPEN_NOCREATE:
828 case NFS4_OPEN_CREATE:
830 READ32(open->op_createmode);
831 switch (open->op_createmode) {
832 case NFS4_CREATE_UNCHECKED:
833 case NFS4_CREATE_GUARDED:
834 status = nfsd4_decode_fattr(argp, open->op_bmval,
835 &open->op_iattr, &open->op_acl);
839 case NFS4_CREATE_EXCLUSIVE:
840 READ_BUF(NFS4_VERIFIER_SIZE);
841 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
843 case NFS4_CREATE_EXCLUSIVE4_1:
844 if (argp->minorversion < 1)
846 READ_BUF(NFS4_VERIFIER_SIZE);
847 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
848 status = nfsd4_decode_fattr(argp, open->op_bmval,
849 &open->op_iattr, &open->op_acl);
863 READ32(open->op_claim_type);
864 switch (open->op_claim_type) {
865 case NFS4_OPEN_CLAIM_NULL:
866 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
868 READ32(open->op_fname.len);
869 READ_BUF(open->op_fname.len);
870 SAVEMEM(open->op_fname.data, open->op_fname.len);
871 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
874 case NFS4_OPEN_CLAIM_PREVIOUS:
876 READ32(open->op_delegate_type);
878 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
879 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
883 READ32(open->op_fname.len);
884 READ_BUF(open->op_fname.len);
885 SAVEMEM(open->op_fname.data, open->op_fname.len);
886 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
889 case NFS4_OPEN_CLAIM_FH:
890 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
891 if (argp->minorversion < 1)
895 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
896 if (argp->minorversion < 1)
898 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
910 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
914 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
918 READ32(open_conf->oc_seqid);
924 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
928 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
932 READ32(open_down->od_seqid);
933 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
934 &open_down->od_deleg_want, NULL);
937 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
944 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
949 READ32(putfh->pf_fhlen);
950 if (putfh->pf_fhlen > NFS4_FHSIZE)
952 READ_BUF(putfh->pf_fhlen);
953 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
959 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
963 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
967 READ64(read->rd_offset);
968 READ32(read->rd_length);
974 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
979 READ64(readdir->rd_cookie);
980 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
981 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
982 READ32(readdir->rd_maxcount);
983 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
990 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
995 READ32(remove->rm_namelen);
996 READ_BUF(remove->rm_namelen);
997 SAVEMEM(remove->rm_name, remove->rm_namelen);
998 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1005 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1010 READ32(rename->rn_snamelen);
1011 READ_BUF(rename->rn_snamelen + 4);
1012 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1013 READ32(rename->rn_tnamelen);
1014 READ_BUF(rename->rn_tnamelen);
1015 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1016 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1018 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1025 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1029 READ_BUF(sizeof(clientid_t));
1030 COPYMEM(clientid, sizeof(clientid_t));
1036 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1037 struct nfsd4_secinfo *secinfo)
1042 READ32(secinfo->si_namelen);
1043 READ_BUF(secinfo->si_namelen);
1044 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1045 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1052 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1053 struct nfsd4_secinfo_no_name *sin)
1058 READ32(sin->sin_style);
1063 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1067 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1070 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1075 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1079 READ_BUF(NFS4_VERIFIER_SIZE);
1080 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1082 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1084 return nfserr_bad_xdr;
1086 READ32(setclientid->se_callback_prog);
1087 READ32(setclientid->se_callback_netid_len);
1089 READ_BUF(setclientid->se_callback_netid_len + 4);
1090 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1091 READ32(setclientid->se_callback_addr_len);
1093 READ_BUF(setclientid->se_callback_addr_len + 4);
1094 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1095 READ32(setclientid->se_callback_ident);
1101 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1105 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1106 COPYMEM(&scd_c->sc_clientid, 8);
1107 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1112 /* Also used for NVERIFY */
1114 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1118 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1121 /* For convenience's sake, we compare raw xdr'd attributes in
1122 * nfsd4_proc_verify */
1125 READ32(verify->ve_attrlen);
1126 READ_BUF(verify->ve_attrlen);
1127 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1133 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1139 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1143 READ64(write->wr_offset);
1144 READ32(write->wr_stable_how);
1145 if (write->wr_stable_how > 2)
1147 READ32(write->wr_buflen);
1149 /* Sorry .. no magic macros for this.. *
1150 * READ_BUF(write->wr_buflen);
1151 * SAVEMEM(write->wr_buf, write->wr_buflen);
1153 avail = (char*)argp->end - (char*)argp->p;
1154 if (avail + argp->pagelen < write->wr_buflen) {
1155 dprintk("NFSD: xdr error (%s:%d)\n",
1156 __FILE__, __LINE__);
1159 write->wr_head.iov_base = p;
1160 write->wr_head.iov_len = avail;
1161 WARN_ON(avail != (XDR_QUADLEN(avail) << 2));
1162 write->wr_pagelist = argp->pagelist;
1164 len = XDR_QUADLEN(write->wr_buflen) << 2;
1170 pages = len >> PAGE_SHIFT;
1171 argp->pagelist += pages;
1172 argp->pagelen -= pages * PAGE_SIZE;
1173 len -= pages * PAGE_SIZE;
1175 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1176 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1178 argp->p += XDR_QUADLEN(len);
1184 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1189 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1190 READ32(rlockowner->rl_owner.len);
1191 READ_BUF(rlockowner->rl_owner.len);
1192 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1194 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1195 return nfserr_inval;
1200 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1201 struct nfsd4_exchange_id *exid)
1206 READ_BUF(NFS4_VERIFIER_SIZE);
1207 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1209 status = nfsd4_decode_opaque(argp, &exid->clname);
1211 return nfserr_bad_xdr;
1214 READ32(exid->flags);
1216 /* Ignore state_protect4_a */
1218 READ32(exid->spa_how);
1219 switch (exid->spa_how) {
1223 /* spo_must_enforce */
1226 READ_BUF(dummy * 4);
1229 /* spo_must_allow */
1232 READ_BUF(dummy * 4);
1239 READ_BUF(dummy * 4);
1244 READ_BUF(dummy * 4);
1247 /* ssp_hash_algs<> */
1254 p += XDR_QUADLEN(dummy);
1257 /* ssp_encr_algs<> */
1264 p += XDR_QUADLEN(dummy);
1267 /* ssp_window and ssp_num_gss_handles */
1276 /* Ignore Implementation ID */
1277 READ_BUF(4); /* nfs_impl_id4 array length */
1288 p += XDR_QUADLEN(dummy);
1294 p += XDR_QUADLEN(dummy);
1304 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1305 struct nfsd4_create_session *sess)
1311 COPYMEM(&sess->clientid, 8);
1312 READ32(sess->seqid);
1313 READ32(sess->flags);
1315 /* Fore channel attrs */
1317 READ32(dummy); /* headerpadsz is always 0 */
1318 READ32(sess->fore_channel.maxreq_sz);
1319 READ32(sess->fore_channel.maxresp_sz);
1320 READ32(sess->fore_channel.maxresp_cached);
1321 READ32(sess->fore_channel.maxops);
1322 READ32(sess->fore_channel.maxreqs);
1323 READ32(sess->fore_channel.nr_rdma_attrs);
1324 if (sess->fore_channel.nr_rdma_attrs == 1) {
1326 READ32(sess->fore_channel.rdma_attrs);
1327 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1328 dprintk("Too many fore channel attr bitmaps!\n");
1332 /* Back channel attrs */
1334 READ32(dummy); /* headerpadsz is always 0 */
1335 READ32(sess->back_channel.maxreq_sz);
1336 READ32(sess->back_channel.maxresp_sz);
1337 READ32(sess->back_channel.maxresp_cached);
1338 READ32(sess->back_channel.maxops);
1339 READ32(sess->back_channel.maxreqs);
1340 READ32(sess->back_channel.nr_rdma_attrs);
1341 if (sess->back_channel.nr_rdma_attrs == 1) {
1343 READ32(sess->back_channel.rdma_attrs);
1344 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1345 dprintk("Too many back channel attr bitmaps!\n");
1350 READ32(sess->callback_prog);
1351 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1356 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1357 struct nfsd4_destroy_session *destroy_session)
1360 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1361 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1367 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1368 struct nfsd4_free_stateid *free_stateid)
1372 READ_BUF(sizeof(stateid_t));
1373 READ32(free_stateid->fr_stateid.si_generation);
1374 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1380 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1381 struct nfsd4_sequence *seq)
1385 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1386 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1388 READ32(seq->slotid);
1389 READ32(seq->maxslots);
1390 READ32(seq->cachethis);
1396 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1400 struct nfsd4_test_stateid_id *stateid;
1403 test_stateid->ts_num_ids = ntohl(*p++);
1405 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1407 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1408 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1410 status = nfserrno(-ENOMEM);
1414 defer_free(argp, kfree, stateid);
1415 INIT_LIST_HEAD(&stateid->ts_id_list);
1416 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1418 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1427 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1428 status = nfserr_bad_xdr;
1432 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1437 COPYMEM(&dc->clientid, 8);
1442 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1447 READ32(rc->rca_one_fs);
1453 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1459 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1461 return nfserr_notsupp;
1464 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1466 static nfsd4_dec nfsd4_dec_ops[] = {
1467 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1468 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1469 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1470 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1471 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1472 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1473 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1474 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1475 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1476 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1477 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1478 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1479 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1480 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1481 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1482 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1483 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1484 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1485 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1486 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1487 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1488 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1489 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1490 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1491 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1492 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1493 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1494 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1495 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1496 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1497 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1498 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1499 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1500 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1501 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1502 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1503 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1506 static nfsd4_dec nfsd41_dec_ops[] = {
1507 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1508 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1509 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1510 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1511 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1512 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1513 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1514 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1515 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1516 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1517 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1518 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1519 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1520 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1521 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1522 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1523 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1524 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1525 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1526 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1527 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1528 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1529 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1530 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1531 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1532 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1533 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1534 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1535 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1536 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1537 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1538 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1539 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1540 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1541 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1542 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1543 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1545 /* new operations for NFSv4.1 */
1546 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1547 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1548 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1549 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1550 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1551 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1552 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1553 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1554 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1555 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1556 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1557 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1558 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1559 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1560 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1561 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1562 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1563 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1564 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1567 struct nfsd4_minorversion_ops {
1568 nfsd4_dec *decoders;
1572 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1573 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1574 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1578 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1581 struct nfsd4_op *op;
1582 struct nfsd4_minorversion_ops *ops;
1583 bool cachethis = false;
1587 READ32(argp->taglen);
1588 READ_BUF(argp->taglen + 8);
1589 SAVEMEM(argp->tag, argp->taglen);
1590 READ32(argp->minorversion);
1591 READ32(argp->opcnt);
1593 if (argp->taglen > NFSD4_MAX_TAGLEN)
1595 if (argp->opcnt > 100)
1598 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1599 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1601 argp->ops = argp->iops;
1602 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1607 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1610 ops = &nfsd4_minorversion[argp->minorversion];
1611 for (i = 0; i < argp->opcnt; i++) {
1618 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1619 op->status = ops->decoders[op->opnum](argp, &op->u);
1621 op->opnum = OP_ILLEGAL;
1622 op->status = nfserr_op_illegal;
1630 * We'll try to cache the result in the DRC if any one
1631 * op in the compound wants to be cached:
1633 cachethis |= nfsd4_cache_this_op(op);
1635 /* Sessions make the DRC unnecessary: */
1636 if (argp->minorversion)
1638 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1643 #define WRITE32(n) *p++ = htonl(n)
1644 #define WRITE64(n) do { \
1645 *p++ = htonl((u32)((n) >> 32)); \
1646 *p++ = htonl((u32)(n)); \
1648 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1649 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1650 memcpy(p, ptr, nbytes); \
1651 p += XDR_QUADLEN(nbytes); \
1654 static void write32(__be32 **p, u32 n)
1659 static void write64(__be32 **p, u64 n)
1661 write32(p, (n >> 32));
1665 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1667 if (IS_I_VERSION(inode)) {
1668 write64(p, inode->i_version);
1670 write32(p, stat->ctime.tv_sec);
1671 write32(p, stat->ctime.tv_nsec);
1675 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1677 write32(p, c->atomic);
1678 if (c->change_supported) {
1679 write64(p, c->before_change);
1680 write64(p, c->after_change);
1682 write32(p, c->before_ctime_sec);
1683 write32(p, c->before_ctime_nsec);
1684 write32(p, c->after_ctime_sec);
1685 write32(p, c->after_ctime_nsec);
1689 #define RESERVE_SPACE(nbytes) do { \
1691 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1693 #define ADJUST_ARGS() resp->p = p
1696 * Header routine to setup seqid operation replay cache
1698 #define ENCODE_SEQID_OP_HEAD \
1704 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1705 * is where sequence id's are incremented, and the replay cache is filled.
1706 * Note that we increment sequence id's here, at the last moment, so we're sure
1707 * we know whether the error to be returned is a sequence id mutating error.
1710 static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1712 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1714 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1715 stateowner->so_seqid++;
1716 stateowner->so_replay.rp_status = nfserr;
1717 stateowner->so_replay.rp_buflen =
1718 (char *)resp->p - (char *)save;
1719 memcpy(stateowner->so_replay.rp_buf, save,
1720 stateowner->so_replay.rp_buflen);
1721 nfsd4_purge_closed_stateid(stateowner);
1725 /* Encode as an array of strings the string given with components
1726 * separated @sep, escaped with esc_enter and esc_exit.
1728 static __be32 nfsd4_encode_components_esc(char sep, char *components,
1729 __be32 **pp, int *buflen,
1730 char esc_enter, char esc_exit)
1734 int strlen, count=0;
1735 char *str, *end, *next;
1737 dprintk("nfsd4_encode_components(%s)\n", components);
1738 if ((*buflen -= 4) < 0)
1739 return nfserr_resource;
1740 WRITE32(0); /* We will fill this in with @count later */
1741 end = str = components;
1743 bool found_esc = false;
1745 /* try to parse as esc_start, ..., esc_end, sep */
1746 if (*str == esc_enter) {
1747 for (; *end && (*end != esc_exit); end++)
1748 /* find esc_exit or end of string */;
1750 if (*end && (!*next || *next == sep)) {
1757 for (; *end && (*end != sep); end++)
1758 /* find sep or end of string */;
1762 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1763 return nfserr_resource;
1765 WRITEMEM(str, strlen);
1778 /* Encode as an array of strings the string given with components
1781 static __be32 nfsd4_encode_components(char sep, char *components,
1782 __be32 **pp, int *buflen)
1784 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1788 * encode a location element of a fs_locations structure
1790 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1791 __be32 **pp, int *buflen)
1796 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1800 status = nfsd4_encode_components('/', location->path, &p, buflen);
1808 * Encode a path in RFC3530 'pathname4' format
1810 static __be32 nfsd4_encode_path(const struct path *root,
1811 const struct path *path, __be32 **pp, int *buflen)
1815 .dentry = path->dentry,
1818 struct dentry **components = NULL;
1819 unsigned int ncomponents = 0;
1820 __be32 err = nfserr_jukebox;
1822 dprintk("nfsd4_encode_components(");
1825 /* First walk the path up to the nfsd root, and store the
1826 * dentries/path components in an array.
1829 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1831 if (cur.dentry == cur.mnt->mnt_root) {
1832 if (follow_up(&cur))
1836 if ((ncomponents & 15) == 0) {
1837 struct dentry **new;
1838 new = krealloc(components,
1839 sizeof(*new) * (ncomponents + 16),
1845 components[ncomponents++] = cur.dentry;
1846 cur.dentry = dget_parent(cur.dentry);
1852 WRITE32(ncomponents);
1854 while (ncomponents) {
1855 struct dentry *dentry = components[ncomponents - 1];
1856 unsigned int len = dentry->d_name.len;
1858 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1862 WRITEMEM(dentry->d_name.name, len);
1863 dprintk("/%s", dentry->d_name.name);
1873 dput(components[--ncomponents]);
1879 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1880 const struct path *path, __be32 **pp, int *buflen)
1882 struct svc_export *exp_ps;
1885 exp_ps = rqst_find_fsidzero_export(rqstp);
1887 return nfserrno(PTR_ERR(exp_ps));
1888 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1894 * encode a fs_locations structure
1896 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1897 struct svc_export *exp,
1898 __be32 **pp, int *buflen)
1903 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1905 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
1908 if ((*buflen -= 4) < 0)
1909 return nfserr_resource;
1910 WRITE32(fslocs->locations_count);
1911 for (i=0; i<fslocs->locations_count; i++) {
1912 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1921 static u32 nfs4_file_type(umode_t mode)
1923 switch (mode & S_IFMT) {
1924 case S_IFIFO: return NF4FIFO;
1925 case S_IFCHR: return NF4CHR;
1926 case S_IFDIR: return NF4DIR;
1927 case S_IFBLK: return NF4BLK;
1928 case S_IFLNK: return NF4LNK;
1929 case S_IFREG: return NF4REG;
1930 case S_IFSOCK: return NF4SOCK;
1931 default: return NF4BAD;
1936 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, kuid_t uid, kgid_t gid,
1937 __be32 **p, int *buflen)
1941 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1942 return nfserr_resource;
1943 if (whotype != NFS4_ACL_WHO_NAMED)
1944 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1945 else if (gid_valid(gid))
1946 status = nfsd_map_gid_to_name(rqstp, gid, (u8 *)(*p + 1));
1948 status = nfsd_map_uid_to_name(rqstp, uid, (u8 *)(*p + 1));
1950 return nfserrno(status);
1951 *p = xdr_encode_opaque(*p, NULL, status);
1952 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1953 BUG_ON(*buflen < 0);
1957 static inline __be32
1958 nfsd4_encode_user(struct svc_rqst *rqstp, kuid_t user, __be32 **p, int *buflen)
1960 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, user, INVALID_GID,
1964 static inline __be32
1965 nfsd4_encode_group(struct svc_rqst *rqstp, kgid_t group, __be32 **p, int *buflen)
1967 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, INVALID_UID, group,
1971 static inline __be32
1972 nfsd4_encode_aclname(struct svc_rqst *rqstp, struct nfs4_ace *ace,
1973 __be32 **p, int *buflen)
1975 kuid_t uid = INVALID_UID;
1976 kgid_t gid = INVALID_GID;
1978 if (ace->whotype == NFS4_ACL_WHO_NAMED) {
1979 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1984 return nfsd4_encode_name(rqstp, ace->whotype, uid, gid, p, buflen);
1987 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1988 FATTR4_WORD0_RDATTR_ERROR)
1989 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1991 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1993 /* As per referral draft: */
1994 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1995 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1996 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1997 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1998 *rdattr_err = NFSERR_MOVED;
2000 return nfserr_moved;
2002 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2003 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2008 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2010 struct path path = exp->ex_path;
2014 while (follow_up(&path)) {
2015 if (path.dentry != path.mnt->mnt_root)
2018 err = vfs_getattr(&path, stat);
2024 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2027 * countp is the buffer size in _words_
2030 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2031 struct dentry *dentry, __be32 **buffer, int count, u32 *bmval,
2032 struct svc_rqst *rqstp, int ignore_crossmnt)
2034 u32 bmval0 = bmval[0];
2035 u32 bmval1 = bmval[1];
2036 u32 bmval2 = bmval[2];
2038 struct svc_fh tempfh;
2039 struct kstatfs statfs;
2040 int buflen = count << 2;
2045 __be32 *p = *buffer;
2049 struct nfs4_acl *acl = NULL;
2050 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2051 u32 minorversion = resp->cstate.minorversion;
2052 struct path path = {
2053 .mnt = exp->ex_path.mnt,
2056 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2058 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2059 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2060 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2061 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2063 if (exp->ex_fslocs.migrated) {
2065 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2070 err = vfs_getattr(&path, &stat);
2073 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2074 FATTR4_WORD0_MAXNAME)) ||
2075 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2076 FATTR4_WORD1_SPACE_TOTAL))) {
2077 err = vfs_statfs(&path, &statfs);
2081 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2082 fh_init(&tempfh, NFS4_FHSIZE);
2083 status = fh_compose(&tempfh, exp, dentry, NULL);
2088 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2089 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2090 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2091 aclsupport = (err == 0);
2092 if (bmval0 & FATTR4_WORD0_ACL) {
2093 if (err == -EOPNOTSUPP)
2094 bmval0 &= ~FATTR4_WORD0_ACL;
2095 else if (err == -EINVAL) {
2096 status = nfserr_attrnotsupp;
2098 } else if (err != 0)
2104 if ((buflen -= 16) < 0)
2110 } else if (bmval1) {
2111 if ((buflen -= 12) < 0)
2117 if ((buflen -= 8) < 0)
2122 attrlenp = p++; /* to be backfilled later */
2124 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2125 u32 word0 = nfsd_suppattrs0(minorversion);
2126 u32 word1 = nfsd_suppattrs1(minorversion);
2127 u32 word2 = nfsd_suppattrs2(minorversion);
2130 word0 &= ~FATTR4_WORD0_ACL;
2132 if ((buflen -= 12) < 0)
2138 if ((buflen -= 16) < 0)
2146 if (bmval0 & FATTR4_WORD0_TYPE) {
2147 if ((buflen -= 4) < 0)
2149 dummy = nfs4_file_type(stat.mode);
2150 if (dummy == NF4BAD)
2151 goto out_serverfault;
2154 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2155 if ((buflen -= 4) < 0)
2157 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2158 WRITE32(NFS4_FH_PERSISTENT);
2160 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
2162 if (bmval0 & FATTR4_WORD0_CHANGE) {
2163 if ((buflen -= 8) < 0)
2165 write_change(&p, &stat, dentry->d_inode);
2167 if (bmval0 & FATTR4_WORD0_SIZE) {
2168 if ((buflen -= 8) < 0)
2172 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2173 if ((buflen -= 4) < 0)
2177 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2178 if ((buflen -= 4) < 0)
2182 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2183 if ((buflen -= 4) < 0)
2187 if (bmval0 & FATTR4_WORD0_FSID) {
2188 if ((buflen -= 16) < 0)
2190 if (exp->ex_fslocs.migrated) {
2191 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2192 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2193 } else switch(fsid_source(fhp)) {
2194 case FSIDSOURCE_FSID:
2195 WRITE64((u64)exp->ex_fsid);
2198 case FSIDSOURCE_DEV:
2200 WRITE32(MAJOR(stat.dev));
2202 WRITE32(MINOR(stat.dev));
2204 case FSIDSOURCE_UUID:
2205 WRITEMEM(exp->ex_uuid, 16);
2209 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2210 if ((buflen -= 4) < 0)
2214 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2215 if ((buflen -= 4) < 0)
2217 WRITE32(nn->nfsd4_lease);
2219 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2220 if ((buflen -= 4) < 0)
2222 WRITE32(rdattr_err);
2224 if (bmval0 & FATTR4_WORD0_ACL) {
2225 struct nfs4_ace *ace;
2228 if ((buflen -= 4) < 0)
2234 if ((buflen -= 4) < 0)
2236 WRITE32(acl->naces);
2238 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2239 if ((buflen -= 4*3) < 0)
2243 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2244 status = nfsd4_encode_aclname(rqstp, ace, &p, &buflen);
2245 if (status == nfserr_resource)
2252 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2253 if ((buflen -= 4) < 0)
2255 WRITE32(aclsupport ?
2256 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2258 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2259 if ((buflen -= 4) < 0)
2263 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2264 if ((buflen -= 4) < 0)
2268 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2269 if ((buflen -= 4) < 0)
2273 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2274 if ((buflen -= 4) < 0)
2278 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2279 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2282 WRITE32(fhp->fh_handle.fh_size);
2283 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2285 if (bmval0 & FATTR4_WORD0_FILEID) {
2286 if ((buflen -= 8) < 0)
2290 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2291 if ((buflen -= 8) < 0)
2293 WRITE64((u64) statfs.f_ffree);
2295 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2296 if ((buflen -= 8) < 0)
2298 WRITE64((u64) statfs.f_ffree);
2300 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2301 if ((buflen -= 8) < 0)
2303 WRITE64((u64) statfs.f_files);
2305 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2306 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2307 if (status == nfserr_resource)
2312 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2313 if ((buflen -= 4) < 0)
2317 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2318 if ((buflen -= 8) < 0)
2322 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2323 if ((buflen -= 4) < 0)
2327 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2328 if ((buflen -= 4) < 0)
2330 WRITE32(statfs.f_namelen);
2332 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2333 if ((buflen -= 8) < 0)
2335 WRITE64((u64) svc_max_payload(rqstp));
2337 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2338 if ((buflen -= 8) < 0)
2340 WRITE64((u64) svc_max_payload(rqstp));
2342 if (bmval1 & FATTR4_WORD1_MODE) {
2343 if ((buflen -= 4) < 0)
2345 WRITE32(stat.mode & S_IALLUGO);
2347 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2348 if ((buflen -= 4) < 0)
2352 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2353 if ((buflen -= 4) < 0)
2355 WRITE32(stat.nlink);
2357 if (bmval1 & FATTR4_WORD1_OWNER) {
2358 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2359 if (status == nfserr_resource)
2364 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2365 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2366 if (status == nfserr_resource)
2371 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2372 if ((buflen -= 8) < 0)
2374 WRITE32((u32) MAJOR(stat.rdev));
2375 WRITE32((u32) MINOR(stat.rdev));
2377 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2378 if ((buflen -= 8) < 0)
2380 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2383 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2384 if ((buflen -= 8) < 0)
2386 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2389 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2390 if ((buflen -= 8) < 0)
2392 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2395 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2396 if ((buflen -= 8) < 0)
2398 dummy64 = (u64)stat.blocks << 9;
2401 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2402 if ((buflen -= 12) < 0)
2405 WRITE32(stat.atime.tv_sec);
2406 WRITE32(stat.atime.tv_nsec);
2408 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2409 if ((buflen -= 12) < 0)
2415 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2416 if ((buflen -= 12) < 0)
2419 WRITE32(stat.ctime.tv_sec);
2420 WRITE32(stat.ctime.tv_nsec);
2422 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2423 if ((buflen -= 12) < 0)
2426 WRITE32(stat.mtime.tv_sec);
2427 WRITE32(stat.mtime.tv_nsec);
2429 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2430 if ((buflen -= 8) < 0)
2433 * Get parent's attributes if not ignoring crossmount
2434 * and this is the root of a cross-mounted filesystem.
2436 if (ignore_crossmnt == 0 &&
2437 dentry == exp->ex_path.mnt->mnt_root)
2438 get_parent_attributes(exp, &stat);
2441 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2443 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2444 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2445 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2448 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2458 status = nfserrno(err);
2461 status = nfserr_resource;
2464 status = nfserr_serverfault;
2468 static inline int attributes_need_mount(u32 *bmval)
2470 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2472 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2478 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2479 const char *name, int namlen, __be32 **p, int buflen)
2481 struct svc_export *exp = cd->rd_fhp->fh_export;
2482 struct dentry *dentry;
2484 int ignore_crossmnt = 0;
2486 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2488 return nfserrno(PTR_ERR(dentry));
2489 if (!dentry->d_inode) {
2491 * nfsd_buffered_readdir drops the i_mutex between
2492 * readdir and calling this callback, leaving a window
2493 * where this directory entry could have gone away.
2496 return nfserr_noent;
2501 * In the case of a mountpoint, the client may be asking for
2502 * attributes that are only properties of the underlying filesystem
2503 * as opposed to the cross-mounted file system. In such a case,
2504 * we will not follow the cross mount and will fill the attribtutes
2505 * directly from the mountpoint dentry.
2507 if (nfsd_mountpoint(dentry, exp)) {
2510 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2511 && !attributes_need_mount(cd->rd_bmval)) {
2512 ignore_crossmnt = 1;
2516 * Why the heck aren't we just using nfsd_lookup??
2517 * Different "."/".." handling? Something else?
2518 * At least, add a comment here to explain....
2520 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2522 nfserr = nfserrno(err);
2525 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2531 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2532 cd->rd_rqstp, ignore_crossmnt);
2540 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2547 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2548 *p++ = htonl(0); /* bmval1 */
2551 *p++ = nfserr; /* no htonl */
2552 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2557 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2558 loff_t offset, u64 ino, unsigned int d_type)
2560 struct readdir_cd *ccd = ccdv;
2561 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2563 __be32 *p = cd->buffer;
2565 __be32 nfserr = nfserr_toosmall;
2567 /* In nfsv4, "." and ".." never make it onto the wire.. */
2568 if (name && isdotent(name, namlen)) {
2569 cd->common.err = nfs_ok;
2574 xdr_encode_hyper(cd->offset, (u64) offset);
2576 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2580 *p++ = xdr_one; /* mark entry present */
2582 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2583 p = xdr_encode_array(p, name, namlen); /* name length & name */
2585 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
2589 case nfserr_resource:
2590 nfserr = nfserr_toosmall;
2596 * If the client requested the RDATTR_ERROR attribute,
2597 * we stuff the error code into this attribute
2598 * and continue. If this attribute was not requested,
2599 * then in accordance with the spec, we fail the
2600 * entire READDIR operation(!)
2602 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2604 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2606 nfserr = nfserr_toosmall;
2610 cd->buflen -= (p - cd->buffer);
2612 cd->offset = cookiep;
2614 cd->common.err = nfs_ok;
2617 cd->common.err = nfserr;
2622 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2626 RESERVE_SPACE(sizeof(stateid_t));
2627 WRITE32(sid->si_generation);
2628 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2633 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2639 WRITE32(access->ac_supported);
2640 WRITE32(access->ac_resp_access);
2646 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2651 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2652 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2654 /* Sorry, we do not yet support RDMA over 4.1: */
2662 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2664 ENCODE_SEQID_OP_HEAD;
2667 nfsd4_encode_stateid(resp, &close->cl_stateid);
2669 encode_seqid_op_tail(resp, save, nfserr);
2675 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2680 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2681 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
2688 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2694 write_cinfo(&p, &create->cr_cinfo);
2696 WRITE32(create->cr_bmval[0]);
2697 WRITE32(create->cr_bmval[1]);
2704 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2706 struct svc_fh *fhp = getattr->ga_fhp;
2712 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2713 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2714 &resp->p, buflen, getattr->ga_bmval,
2720 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2722 struct svc_fh *fhp = *fhpp;
2727 len = fhp->fh_handle.fh_size;
2728 RESERVE_SPACE(len + 4);
2730 WRITEMEM(&fhp->fh_handle.fh_base, len);
2737 * Including all fields other than the name, a LOCK4denied structure requires
2738 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2741 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2743 struct xdr_netobj *conf = &ld->ld_owner;
2746 RESERVE_SPACE(32 + XDR_LEN(conf->len));
2747 WRITE64(ld->ld_start);
2748 WRITE64(ld->ld_length);
2749 WRITE32(ld->ld_type);
2751 WRITEMEM(&ld->ld_clientid, 8);
2753 WRITEMEM(conf->data, conf->len);
2755 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2756 WRITE64((u64)0); /* clientid */
2757 WRITE32(0); /* length of owner name */
2763 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2765 ENCODE_SEQID_OP_HEAD;
2768 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2769 else if (nfserr == nfserr_denied)
2770 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2772 encode_seqid_op_tail(resp, save, nfserr);
2777 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2779 if (nfserr == nfserr_denied)
2780 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2785 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2787 ENCODE_SEQID_OP_HEAD;
2790 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2792 encode_seqid_op_tail(resp, save, nfserr);
2798 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2804 write_cinfo(&p, &link->li_cinfo);
2812 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2815 ENCODE_SEQID_OP_HEAD;
2820 nfsd4_encode_stateid(resp, &open->op_stateid);
2822 write_cinfo(&p, &open->op_cinfo);
2823 WRITE32(open->op_rflags);
2825 WRITE32(open->op_bmval[0]);
2826 WRITE32(open->op_bmval[1]);
2827 WRITE32(open->op_delegate_type);
2830 switch (open->op_delegate_type) {
2831 case NFS4_OPEN_DELEGATE_NONE:
2833 case NFS4_OPEN_DELEGATE_READ:
2834 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2836 WRITE32(open->op_recall);
2839 * TODO: ACE's in delegations
2841 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2844 WRITE32(0); /* XXX: is NULL principal ok? */
2847 case NFS4_OPEN_DELEGATE_WRITE:
2848 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2853 * TODO: space_limit's in delegations
2855 WRITE32(NFS4_LIMIT_SIZE);
2860 * TODO: ACE's in delegations
2862 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2865 WRITE32(0); /* XXX: is NULL principal ok? */
2868 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2869 switch (open->op_why_no_deleg) {
2870 case WND4_CONTENTION:
2873 WRITE32(open->op_why_no_deleg);
2874 WRITE32(0); /* deleg signaling not supported yet */
2878 WRITE32(open->op_why_no_deleg);
2885 /* XXX save filehandle here */
2887 encode_seqid_op_tail(resp, save, nfserr);
2892 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2894 ENCODE_SEQID_OP_HEAD;
2897 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2899 encode_seqid_op_tail(resp, save, nfserr);
2904 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2906 ENCODE_SEQID_OP_HEAD;
2909 nfsd4_encode_stateid(resp, &od->od_stateid);
2911 encode_seqid_op_tail(resp, save, nfserr);
2916 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2917 struct nfsd4_read *read)
2922 unsigned long maxcount;
2928 if (resp->xbuf->page_len)
2929 return nfserr_resource;
2931 RESERVE_SPACE(8); /* eof flag and byte count */
2933 maxcount = svc_max_payload(resp->rqstp);
2934 if (maxcount > read->rd_length)
2935 maxcount = read->rd_length;
2940 page = *(resp->rqstp->rq_next_page);
2941 if (!page) { /* ran out of pages */
2945 resp->rqstp->rq_vec[v].iov_base = page_address(page);
2946 resp->rqstp->rq_vec[v].iov_len =
2947 len < PAGE_SIZE ? len : PAGE_SIZE;
2948 resp->rqstp->rq_next_page++;
2954 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2955 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2960 eof = (read->rd_offset + maxcount >=
2961 read->rd_fhp->fh_dentry->d_inode->i_size);
2966 resp->xbuf->head[0].iov_len = (char*)p
2967 - (char*)resp->xbuf->head[0].iov_base;
2968 resp->xbuf->page_len = maxcount;
2970 /* Use rest of head for padding and remaining ops: */
2971 resp->xbuf->tail[0].iov_base = p;
2972 resp->xbuf->tail[0].iov_len = 0;
2976 resp->xbuf->tail[0].iov_base += maxcount&3;
2977 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2984 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
2992 if (resp->xbuf->page_len)
2993 return nfserr_resource;
2994 if (!*resp->rqstp->rq_next_page)
2995 return nfserr_resource;
2997 page = page_address(*(resp->rqstp->rq_next_page++));
2999 maxcount = PAGE_SIZE;
3003 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3004 * if they would overflow the buffer. Is this kosher in NFSv4? If
3005 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3006 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3008 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3009 if (nfserr == nfserr_isdir)
3010 return nfserr_inval;
3016 resp->xbuf->head[0].iov_len = (char*)p
3017 - (char*)resp->xbuf->head[0].iov_base;
3018 resp->xbuf->page_len = maxcount;
3020 /* Use rest of head for padding and remaining ops: */
3021 resp->xbuf->tail[0].iov_base = p;
3022 resp->xbuf->tail[0].iov_len = 0;
3026 resp->xbuf->tail[0].iov_base += maxcount&3;
3027 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3034 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3038 __be32 *page, *savep, *tailbase;
3043 if (resp->xbuf->page_len)
3044 return nfserr_resource;
3045 if (!*resp->rqstp->rq_next_page)
3046 return nfserr_resource;
3048 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
3051 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3055 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
3058 maxcount = PAGE_SIZE;
3059 if (maxcount > readdir->rd_maxcount)
3060 maxcount = readdir->rd_maxcount;
3063 * Convert from bytes to words, account for the two words already
3064 * written, make sure to leave two words at the end for the next
3065 * pointer and eof field.
3067 maxcount = (maxcount >> 2) - 4;
3069 nfserr = nfserr_toosmall;
3073 page = page_address(*(resp->rqstp->rq_next_page++));
3074 readdir->common.err = 0;
3075 readdir->buflen = maxcount;
3076 readdir->buffer = page;
3077 readdir->offset = NULL;
3079 offset = readdir->rd_cookie;
3080 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3082 &readdir->common, nfsd4_encode_dirent);
3083 if (nfserr == nfs_ok &&
3084 readdir->common.err == nfserr_toosmall &&
3085 readdir->buffer == page)
3086 nfserr = nfserr_toosmall;
3090 if (readdir->offset)
3091 xdr_encode_hyper(readdir->offset, offset);
3093 p = readdir->buffer;
3094 *p++ = 0; /* no more entries */
3095 *p++ = htonl(readdir->common.err == nfserr_eof);
3096 resp->xbuf->page_len = ((char*)p) -
3097 (char*)page_address(*(resp->rqstp->rq_next_page-1));
3099 /* Use rest of head for padding and remaining ops: */
3100 resp->xbuf->tail[0].iov_base = tailbase;
3101 resp->xbuf->tail[0].iov_len = 0;
3102 resp->p = resp->xbuf->tail[0].iov_base;
3103 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
3113 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3119 write_cinfo(&p, &remove->rm_cinfo);
3126 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3132 write_cinfo(&p, &rename->rn_sinfo);
3133 write_cinfo(&p, &rename->rn_tinfo);
3140 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3141 __be32 nfserr,struct svc_export *exp)
3145 struct exp_flavor_info *flavs;
3146 struct exp_flavor_info def_flavs[2];
3151 if (exp->ex_nflavors) {
3152 flavs = exp->ex_flavors;
3153 nflavs = exp->ex_nflavors;
3154 } else { /* Handling of some defaults in absence of real secinfo: */
3156 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3158 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3159 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3160 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3162 flavs[0].pseudoflavor
3163 = svcauth_gss_flavor(exp->ex_client);
3166 flavs[0].pseudoflavor
3167 = exp->ex_client->flavour->flavour;
3174 for (i = 0; i < nflavs; i++) {
3175 u32 flav = flavs[i].pseudoflavor;
3176 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3180 WRITE32(RPC_AUTH_GSS);
3182 RESERVE_SPACE(4 + gm->gm_oid.len);
3183 WRITE32(gm->gm_oid.len);
3184 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3187 WRITE32(0); /* qop */
3190 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3206 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3207 struct nfsd4_secinfo *secinfo)
3209 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3213 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3214 struct nfsd4_secinfo_no_name *secinfo)
3216 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3220 * The SETATTR encode routine is special -- it always encodes a bitmap,
3221 * regardless of the error status.
3224 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3236 WRITE32(setattr->sa_bmval[0]);
3237 WRITE32(setattr->sa_bmval[1]);
3244 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3249 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
3250 WRITEMEM(&scd->se_clientid, 8);
3251 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
3254 else if (nfserr == nfserr_clid_inuse) {
3264 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3270 WRITE32(write->wr_bytes_written);
3271 WRITE32(write->wr_how_written);
3272 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
3279 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3280 struct nfsd4_exchange_id *exid)
3286 int server_scope_sz;
3287 uint64_t minor_id = 0;
3292 major_id = utsname()->nodename;
3293 major_id_sz = strlen(major_id);
3294 server_scope = utsname()->nodename;
3295 server_scope_sz = strlen(server_scope);
3298 8 /* eir_clientid */ +
3299 4 /* eir_sequenceid */ +
3301 4 /* spr_how (SP4_NONE) */ +
3302 8 /* so_minor_id */ +
3303 4 /* so_major_id.len */ +
3304 (XDR_QUADLEN(major_id_sz) * 4) +
3305 4 /* eir_server_scope.len */ +
3306 (XDR_QUADLEN(server_scope_sz) * 4) +
3307 4 /* eir_server_impl_id.count (0) */);
3309 WRITEMEM(&exid->clientid, 8);
3310 WRITE32(exid->seqid);
3311 WRITE32(exid->flags);
3313 /* state_protect4_r. Currently only support SP4_NONE */
3314 BUG_ON(exid->spa_how != SP4_NONE);
3315 WRITE32(exid->spa_how);
3317 /* The server_owner struct */
3318 WRITE64(minor_id); /* Minor id */
3320 WRITE32(major_id_sz);
3321 WRITEMEM(major_id, major_id_sz);
3324 WRITE32(server_scope_sz);
3325 WRITEMEM(server_scope, server_scope_sz);
3327 /* Implementation id */
3328 WRITE32(0); /* zero length nfs_impl_id4 array */
3334 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3335 struct nfsd4_create_session *sess)
3343 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3344 WRITE32(sess->seqid);
3345 WRITE32(sess->flags);
3349 WRITE32(0); /* headerpadsz */
3350 WRITE32(sess->fore_channel.maxreq_sz);
3351 WRITE32(sess->fore_channel.maxresp_sz);
3352 WRITE32(sess->fore_channel.maxresp_cached);
3353 WRITE32(sess->fore_channel.maxops);
3354 WRITE32(sess->fore_channel.maxreqs);
3355 WRITE32(sess->fore_channel.nr_rdma_attrs);
3358 if (sess->fore_channel.nr_rdma_attrs) {
3360 WRITE32(sess->fore_channel.rdma_attrs);
3365 WRITE32(0); /* headerpadsz */
3366 WRITE32(sess->back_channel.maxreq_sz);
3367 WRITE32(sess->back_channel.maxresp_sz);
3368 WRITE32(sess->back_channel.maxresp_cached);
3369 WRITE32(sess->back_channel.maxops);
3370 WRITE32(sess->back_channel.maxreqs);
3371 WRITE32(sess->back_channel.nr_rdma_attrs);
3374 if (sess->back_channel.nr_rdma_attrs) {
3376 WRITE32(sess->back_channel.rdma_attrs);
3383 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3384 struct nfsd4_destroy_session *destroy_session)
3390 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3391 struct nfsd4_free_stateid *free_stateid)
3405 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3406 struct nfsd4_sequence *seq)
3413 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3414 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3415 WRITE32(seq->seqid);
3416 WRITE32(seq->slotid);
3417 /* Note slotid's are numbered from zero: */
3418 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3419 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3420 WRITE32(seq->status_flags);
3423 resp->cstate.datap = p; /* DRC cache data pointer */
3428 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3429 struct nfsd4_test_stateid *test_stateid)
3431 struct nfsd4_test_stateid_id *stateid, *next;
3434 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
3435 *p++ = htonl(test_stateid->ts_num_ids);
3437 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3438 *p++ = stateid->ts_id_status;
3446 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3451 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3454 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3455 * since we don't need to filter out obsolete ops as this is
3456 * done in the decoding phase.
3458 static nfsd4_enc nfsd4_enc_ops[] = {
3459 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3460 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3461 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3462 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3463 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3464 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3465 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3466 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3467 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3468 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3469 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3470 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3471 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3472 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3473 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3474 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3475 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3476 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3477 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3478 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3479 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3480 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3481 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3482 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3483 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3484 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3485 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3486 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3487 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3488 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3489 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3490 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3491 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3492 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3493 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3494 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3495 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3497 /* NFSv4.1 operations */
3498 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3499 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3500 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3501 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3502 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3503 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
3504 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3505 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3506 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3507 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3508 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3509 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3510 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3511 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3512 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3513 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3514 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3515 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3516 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3520 * Calculate the total amount of memory that the compound response has taken
3521 * after encoding the current operation with pad.
3523 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3524 * which was specified at nfsd4_operation, else pad is zero.
3526 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3528 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3529 * will be at least a page and will therefore hold the xdr_buf head.
3531 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
3533 struct xdr_buf *xb = &resp->rqstp->rq_res;
3534 struct nfsd4_session *session = NULL;
3535 struct nfsd4_slot *slot = resp->cstate.slot;
3536 u32 length, tlen = 0;
3538 if (!nfsd4_has_session(&resp->cstate))
3541 session = resp->cstate.session;
3542 if (session == NULL)
3545 if (xb->page_len == 0) {
3546 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3548 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3549 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3551 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3553 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3554 length, xb->page_len, tlen, pad);
3556 if (length > session->se_fchannel.maxresp_sz)
3557 return nfserr_rep_too_big;
3559 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
3560 length > session->se_fchannel.maxresp_cached)
3561 return nfserr_rep_too_big_to_cache;
3567 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3574 statp = p++; /* to be backfilled at the end */
3577 if (op->opnum == OP_ILLEGAL)
3579 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3580 !nfsd4_enc_ops[op->opnum]);
3581 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3582 /* nfsd4_check_drc_limit guarantees enough room for error status */
3584 op->status = nfsd4_check_resp_size(resp, 0);
3587 * Note: We write the status directly, instead of using WRITE32(),
3588 * since it is already in network byte order.
3590 *statp = op->status;
3594 * Encode the reply stored in the stateowner reply cache
3596 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3597 * previously sent already encoded operation.
3599 * called with nfs4_lock_state() held
3602 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3605 struct nfs4_replay *rp = op->replay;
3611 *p++ = rp->rp_status; /* already xdr'ed */
3614 RESERVE_SPACE(rp->rp_buflen);
3615 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3620 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3622 return xdr_ressize_check(rqstp, p);
3625 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3627 struct svc_rqst *rqstp = rq;
3628 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3630 if (args->ops != args->iops) {
3632 args->ops = args->iops;
3636 while (args->to_free) {
3637 struct tmpbuf *tb = args->to_free;
3638 args->to_free = tb->next;
3639 tb->release(tb->buf);
3646 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3649 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3650 args->pagelist = rqstp->rq_arg.pages;
3651 args->pagelen = rqstp->rq_arg.page_len;
3653 args->to_free = NULL;
3654 args->ops = args->iops;
3655 args->rqstp = rqstp;
3657 return !nfsd4_decode_compound(args);
3661 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3664 * All that remains is to write the tag and operation count...
3666 struct nfsd4_compound_state *cs = &resp->cstate;
3669 *p++ = htonl(resp->taglen);
3670 memcpy(p, resp->tag, resp->taglen);
3671 p += XDR_QUADLEN(resp->taglen);
3672 *p++ = htonl(resp->opcnt);
3674 if (rqstp->rq_res.page_len)
3675 iov = &rqstp->rq_res.tail[0];
3677 iov = &rqstp->rq_res.head[0];
3678 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3679 BUG_ON(iov->iov_len > PAGE_SIZE);
3680 if (nfsd4_has_session(cs)) {
3681 if (cs->status != nfserr_replay_cache) {
3682 nfsd4_store_cache_entry(resp);
3683 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3685 /* Renew the clientid on success and on replay */
3686 release_session_client(cs->session);
3687 nfsd4_put_session(cs->session);