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 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59 #include <linux/security.h>
63 #define NFSDDBG_FACILITY NFSDDBG_XDR
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
70 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
74 check_filename(char *str, int len)
80 if (isdotent(str, len))
81 return nfserr_badname;
82 for (i = 0; i < len; i++)
84 return nfserr_badname;
96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
98 status = nfserr_bad_xdr; \
101 #define READ32(x) (x) = ntohl(*p++)
102 #define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
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 void next_decode_page(struct nfsd4_compoundargs *argp)
139 argp->p = page_address(argp->pagelist[0]);
141 if (argp->pagelen < PAGE_SIZE) {
142 argp->end = argp->p + (argp->pagelen>>2);
145 argp->end = argp->p + (PAGE_SIZE>>2);
146 argp->pagelen -= PAGE_SIZE;
150 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
152 /* We want more bytes than seem to be available.
153 * Maybe we need a new page, maybe we have just run out
155 unsigned int avail = (char *)argp->end - (char *)argp->p;
157 if (avail + argp->pagelen < nbytes)
159 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
161 /* ok, we can do it with the current plus the next page */
162 if (nbytes <= sizeof(argp->tmp))
166 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
172 * The following memcpy is safe because read_buf is always
173 * called with nbytes > avail, and the two cases above both
174 * guarantee p points to at least nbytes bytes.
176 memcpy(p, argp->p, avail);
177 next_decode_page(argp);
178 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
179 argp->p += XDR_QUADLEN(nbytes - avail);
183 static int zero_clientid(clientid_t *clid)
185 return (clid->cl_boot == 0) && (clid->cl_id == 0);
189 * defer_free - mark an allocation as deferred freed
190 * @argp: NFSv4 compound argument structure to be freed with
191 * @release: release callback to free @p, typically kfree()
192 * @p: pointer to be freed
194 * Marks @p to be freed when processing the compound operation
195 * described in @argp finishes.
198 defer_free(struct nfsd4_compoundargs *argp,
199 void (*release)(const void *), void *p)
203 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
207 tb->release = release;
208 tb->next = argp->to_free;
214 * savemem - duplicate a chunk of memory for later processing
215 * @argp: NFSv4 compound argument structure to be freed with
216 * @p: pointer to be duplicated
217 * @nbytes: length to be duplicated
219 * Returns a pointer to a copy of @nbytes bytes of memory at @p
220 * that are preserved until processing of the NFSv4 compound
221 * operation described by @argp finishes.
223 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
225 if (p == argp->tmp) {
226 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
230 BUG_ON(p != argp->tmpp);
233 if (defer_free(argp, kfree, p)) {
241 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
255 READ_BUF(bmlen << 2);
267 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
268 struct iattr *iattr, struct nfs4_acl **acl,
269 struct xdr_netobj *label)
271 int expected_len, len = 0;
277 if ((status = nfsd4_decode_bitmap(argp, bmval)))
281 READ32(expected_len);
283 if (bmval[0] & FATTR4_WORD0_SIZE) {
286 READ64(iattr->ia_size);
287 iattr->ia_valid |= ATTR_SIZE;
289 if (bmval[0] & FATTR4_WORD0_ACL) {
291 struct nfs4_ace *ace;
293 READ_BUF(4); len += 4;
296 if (nace > NFS4_ACL_MAX)
299 *acl = nfs4_acl_new(nace);
301 return nfserr_jukebox;
303 defer_free(argp, kfree, *acl);
305 (*acl)->naces = nace;
306 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
307 READ_BUF(16); len += 16;
310 READ32(ace->access_mask);
313 len += XDR_QUADLEN(dummy32) << 2;
314 READMEM(buf, dummy32);
315 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
317 if (ace->whotype != NFS4_ACL_WHO_NAMED)
319 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
320 status = nfsd_map_name_to_gid(argp->rqstp,
321 buf, dummy32, &ace->who_gid);
323 status = nfsd_map_name_to_uid(argp->rqstp,
324 buf, dummy32, &ace->who_uid);
330 if (bmval[1] & FATTR4_WORD1_MODE) {
333 READ32(iattr->ia_mode);
334 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
335 iattr->ia_valid |= ATTR_MODE;
337 if (bmval[1] & FATTR4_WORD1_OWNER) {
342 len += (XDR_QUADLEN(dummy32) << 2);
343 READMEM(buf, dummy32);
344 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
346 iattr->ia_valid |= ATTR_UID;
348 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
353 len += (XDR_QUADLEN(dummy32) << 2);
354 READMEM(buf, dummy32);
355 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
357 iattr->ia_valid |= ATTR_GID;
359 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
364 case NFS4_SET_TO_CLIENT_TIME:
365 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
366 all 32 bits of 'nseconds'. */
369 READ64(iattr->ia_atime.tv_sec);
370 READ32(iattr->ia_atime.tv_nsec);
371 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
373 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
375 case NFS4_SET_TO_SERVER_TIME:
376 iattr->ia_valid |= ATTR_ATIME;
382 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
387 case NFS4_SET_TO_CLIENT_TIME:
388 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
389 all 32 bits of 'nseconds'. */
392 READ64(iattr->ia_mtime.tv_sec);
393 READ32(iattr->ia_mtime.tv_nsec);
394 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
396 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
398 case NFS4_SET_TO_SERVER_TIME:
399 iattr->ia_valid |= ATTR_MTIME;
407 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
408 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
411 READ32(dummy32); /* lfs: we don't use it */
414 READ32(dummy32); /* pi: we don't use it either */
419 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
420 return nfserr_badlabel;
421 len += (XDR_QUADLEN(dummy32) << 2);
422 READMEM(buf, dummy32);
423 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
425 return nfserr_jukebox;
426 label->len = dummy32;
427 defer_free(argp, kfree, label->data);
428 memcpy(label->data, buf, dummy32);
432 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
433 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
434 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
435 READ_BUF(expected_len - len);
436 else if (len != expected_len)
443 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
447 READ_BUF(sizeof(stateid_t));
448 READ32(sid->si_generation);
449 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
455 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
460 READ32(access->ac_req_access);
465 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
473 /* callback_sec_params4 */
477 cbs->flavor = (u32)(-1);
479 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
481 for (i = 0; i < nr_secflavs; ++i) {
486 /* Nothing to read */
487 if (cbs->flavor == (u32)(-1))
488 cbs->flavor = RPC_AUTH_NULL;
498 SAVEMEM(machine_name, dummy);
509 if (cbs->flavor == (u32)(-1)) {
510 kuid_t kuid = make_kuid(&init_user_ns, uid);
511 kgid_t kgid = make_kgid(&init_user_ns, gid);
512 if (uid_valid(kuid) && gid_valid(kgid)) {
515 cbs->flavor = RPC_AUTH_UNIX;
517 dprintk("RPC_AUTH_UNIX with invalid"
518 "uid or gid ignoring!\n");
523 dprintk("RPC_AUTH_GSS callback secflavor "
528 /* gcbp_handle_from_server */
531 p += XDR_QUADLEN(dummy);
532 /* gcbp_handle_from_client */
538 dprintk("Illegal callback secflavor\n");
545 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
550 READ32(bc->bc_cb_program);
551 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
556 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
560 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
561 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
563 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
564 * could help us figure out we should be using it. */
569 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
574 READ32(close->cl_seqid);
575 return nfsd4_decode_stateid(argp, &close->cl_stateid);
582 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
587 READ64(commit->co_offset);
588 READ32(commit->co_count);
594 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
599 READ32(create->cr_type);
600 switch (create->cr_type) {
603 READ32(create->cr_linklen);
604 READ_BUF(create->cr_linklen);
605 SAVEMEM(create->cr_linkname, create->cr_linklen);
610 READ32(create->cr_specdata1);
611 READ32(create->cr_specdata2);
621 READ32(create->cr_namelen);
622 READ_BUF(create->cr_namelen);
623 SAVEMEM(create->cr_name, create->cr_namelen);
624 if ((status = check_filename(create->cr_name, create->cr_namelen)))
627 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
628 &create->cr_acl, &create->cr_label);
636 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
638 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
642 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
644 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
648 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
653 READ32(link->li_namelen);
654 READ_BUF(link->li_namelen);
655 SAVEMEM(link->li_name, link->li_namelen);
656 if ((status = check_filename(link->li_name, link->li_namelen)))
663 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
668 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
671 READ32(lock->lk_type);
672 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
674 READ32(lock->lk_reclaim);
675 READ64(lock->lk_offset);
676 READ64(lock->lk_length);
677 READ32(lock->lk_is_new);
679 if (lock->lk_is_new) {
681 READ32(lock->lk_new_open_seqid);
682 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
685 READ_BUF(8 + sizeof(clientid_t));
686 READ32(lock->lk_new_lock_seqid);
687 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
688 READ32(lock->lk_new_owner.len);
689 READ_BUF(lock->lk_new_owner.len);
690 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
692 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
696 READ32(lock->lk_old_lock_seqid);
703 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
708 READ32(lockt->lt_type);
709 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
711 READ64(lockt->lt_offset);
712 READ64(lockt->lt_length);
713 COPYMEM(&lockt->lt_clientid, 8);
714 READ32(lockt->lt_owner.len);
715 READ_BUF(lockt->lt_owner.len);
716 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
722 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
727 READ32(locku->lu_type);
728 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
730 READ32(locku->lu_seqid);
731 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
735 READ64(locku->lu_offset);
736 READ64(locku->lu_length);
742 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
747 READ32(lookup->lo_len);
748 READ_BUF(lookup->lo_len);
749 SAVEMEM(lookup->lo_name, lookup->lo_len);
750 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
756 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
763 *share_access = w & NFS4_SHARE_ACCESS_MASK;
764 *deleg_want = w & NFS4_SHARE_WANT_MASK;
766 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
768 switch (w & NFS4_SHARE_ACCESS_MASK) {
769 case NFS4_SHARE_ACCESS_READ:
770 case NFS4_SHARE_ACCESS_WRITE:
771 case NFS4_SHARE_ACCESS_BOTH:
774 return nfserr_bad_xdr;
776 w &= ~NFS4_SHARE_ACCESS_MASK;
779 if (!argp->minorversion)
780 return nfserr_bad_xdr;
781 switch (w & NFS4_SHARE_WANT_MASK) {
782 case NFS4_SHARE_WANT_NO_PREFERENCE:
783 case NFS4_SHARE_WANT_READ_DELEG:
784 case NFS4_SHARE_WANT_WRITE_DELEG:
785 case NFS4_SHARE_WANT_ANY_DELEG:
786 case NFS4_SHARE_WANT_NO_DELEG:
787 case NFS4_SHARE_WANT_CANCEL:
790 return nfserr_bad_xdr;
792 w &= ~NFS4_SHARE_WANT_MASK;
796 if (!deleg_when) /* open_downgrade */
799 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
800 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
801 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
802 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
806 return nfserr_bad_xdr;
809 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
815 /* Note: unlinke access bits, deny bits may be zero. */
816 if (*x & ~NFS4_SHARE_DENY_BOTH)
817 return nfserr_bad_xdr;
820 return nfserr_bad_xdr;
823 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
830 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
831 return nfserr_bad_xdr;
834 SAVEMEM(o->data, o->len);
837 return nfserr_bad_xdr;
841 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
846 memset(open->op_bmval, 0, sizeof(open->op_bmval));
847 open->op_iattr.ia_valid = 0;
848 open->op_openowner = NULL;
850 open->op_xdr_error = 0;
851 /* seqid, share_access, share_deny, clientid, ownerlen */
853 READ32(open->op_seqid);
854 /* decode, yet ignore deleg_when until supported */
855 status = nfsd4_decode_share_access(argp, &open->op_share_access,
856 &open->op_deleg_want, &dummy);
859 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
862 READ_BUF(sizeof(clientid_t));
863 COPYMEM(&open->op_clientid, sizeof(clientid_t));
864 status = nfsd4_decode_opaque(argp, &open->op_owner);
868 READ32(open->op_create);
869 switch (open->op_create) {
870 case NFS4_OPEN_NOCREATE:
872 case NFS4_OPEN_CREATE:
874 READ32(open->op_createmode);
875 switch (open->op_createmode) {
876 case NFS4_CREATE_UNCHECKED:
877 case NFS4_CREATE_GUARDED:
878 status = nfsd4_decode_fattr(argp, open->op_bmval,
879 &open->op_iattr, &open->op_acl, &open->op_label);
883 case NFS4_CREATE_EXCLUSIVE:
884 READ_BUF(NFS4_VERIFIER_SIZE);
885 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
887 case NFS4_CREATE_EXCLUSIVE4_1:
888 if (argp->minorversion < 1)
890 READ_BUF(NFS4_VERIFIER_SIZE);
891 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
892 status = nfsd4_decode_fattr(argp, open->op_bmval,
893 &open->op_iattr, &open->op_acl, &open->op_label);
907 READ32(open->op_claim_type);
908 switch (open->op_claim_type) {
909 case NFS4_OPEN_CLAIM_NULL:
910 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
912 READ32(open->op_fname.len);
913 READ_BUF(open->op_fname.len);
914 SAVEMEM(open->op_fname.data, open->op_fname.len);
915 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
918 case NFS4_OPEN_CLAIM_PREVIOUS:
920 READ32(open->op_delegate_type);
922 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
923 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
927 READ32(open->op_fname.len);
928 READ_BUF(open->op_fname.len);
929 SAVEMEM(open->op_fname.data, open->op_fname.len);
930 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
933 case NFS4_OPEN_CLAIM_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 if (argp->minorversion < 1)
939 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
940 if (argp->minorversion < 1)
942 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
954 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
958 if (argp->minorversion >= 1)
959 return nfserr_notsupp;
961 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
965 READ32(open_conf->oc_seqid);
971 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
975 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
979 READ32(open_down->od_seqid);
980 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
981 &open_down->od_deleg_want, NULL);
984 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
991 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
996 READ32(putfh->pf_fhlen);
997 if (putfh->pf_fhlen > NFS4_FHSIZE)
999 READ_BUF(putfh->pf_fhlen);
1000 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1006 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1008 if (argp->minorversion == 0)
1010 return nfserr_notsupp;
1014 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1018 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1022 READ64(read->rd_offset);
1023 READ32(read->rd_length);
1029 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1034 READ64(readdir->rd_cookie);
1035 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1036 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
1037 READ32(readdir->rd_maxcount);
1038 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1045 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1050 READ32(remove->rm_namelen);
1051 READ_BUF(remove->rm_namelen);
1052 SAVEMEM(remove->rm_name, remove->rm_namelen);
1053 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1060 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1065 READ32(rename->rn_snamelen);
1066 READ_BUF(rename->rn_snamelen + 4);
1067 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1068 READ32(rename->rn_tnamelen);
1069 READ_BUF(rename->rn_tnamelen);
1070 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1071 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1073 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1080 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1084 if (argp->minorversion >= 1)
1085 return nfserr_notsupp;
1087 READ_BUF(sizeof(clientid_t));
1088 COPYMEM(clientid, sizeof(clientid_t));
1094 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1095 struct nfsd4_secinfo *secinfo)
1100 READ32(secinfo->si_namelen);
1101 READ_BUF(secinfo->si_namelen);
1102 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1103 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1110 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1111 struct nfsd4_secinfo_no_name *sin)
1116 READ32(sin->sin_style);
1121 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1125 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1128 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1129 &setattr->sa_acl, &setattr->sa_label);
1133 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1137 if (argp->minorversion >= 1)
1138 return nfserr_notsupp;
1140 READ_BUF(NFS4_VERIFIER_SIZE);
1141 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1143 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1145 return nfserr_bad_xdr;
1147 READ32(setclientid->se_callback_prog);
1148 READ32(setclientid->se_callback_netid_len);
1150 READ_BUF(setclientid->se_callback_netid_len + 4);
1151 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1152 READ32(setclientid->se_callback_addr_len);
1154 READ_BUF(setclientid->se_callback_addr_len + 4);
1155 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1156 READ32(setclientid->se_callback_ident);
1162 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1166 if (argp->minorversion >= 1)
1167 return nfserr_notsupp;
1169 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1170 COPYMEM(&scd_c->sc_clientid, 8);
1171 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1176 /* Also used for NVERIFY */
1178 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1182 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1185 /* For convenience's sake, we compare raw xdr'd attributes in
1186 * nfsd4_proc_verify */
1189 READ32(verify->ve_attrlen);
1190 READ_BUF(verify->ve_attrlen);
1191 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1197 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1203 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1207 READ64(write->wr_offset);
1208 READ32(write->wr_stable_how);
1209 if (write->wr_stable_how > 2)
1211 READ32(write->wr_buflen);
1213 /* Sorry .. no magic macros for this.. *
1214 * READ_BUF(write->wr_buflen);
1215 * SAVEMEM(write->wr_buf, write->wr_buflen);
1217 avail = (char*)argp->end - (char*)argp->p;
1218 if (avail + argp->pagelen < write->wr_buflen) {
1219 dprintk("NFSD: xdr error (%s:%d)\n",
1220 __FILE__, __LINE__);
1223 write->wr_head.iov_base = p;
1224 write->wr_head.iov_len = avail;
1225 write->wr_pagelist = argp->pagelist;
1227 len = XDR_QUADLEN(write->wr_buflen) << 2;
1233 pages = len >> PAGE_SHIFT;
1234 argp->pagelist += pages;
1235 argp->pagelen -= pages * PAGE_SIZE;
1236 len -= pages * PAGE_SIZE;
1238 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1240 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1242 argp->p += XDR_QUADLEN(len);
1248 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1252 if (argp->minorversion >= 1)
1253 return nfserr_notsupp;
1256 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1257 READ32(rlockowner->rl_owner.len);
1258 READ_BUF(rlockowner->rl_owner.len);
1259 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1261 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1262 return nfserr_inval;
1267 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1268 struct nfsd4_exchange_id *exid)
1273 READ_BUF(NFS4_VERIFIER_SIZE);
1274 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1276 status = nfsd4_decode_opaque(argp, &exid->clname);
1278 return nfserr_bad_xdr;
1281 READ32(exid->flags);
1283 /* Ignore state_protect4_a */
1285 READ32(exid->spa_how);
1286 switch (exid->spa_how) {
1290 /* spo_must_enforce */
1293 READ_BUF(dummy * 4);
1296 /* spo_must_allow */
1299 READ_BUF(dummy * 4);
1306 READ_BUF(dummy * 4);
1311 READ_BUF(dummy * 4);
1314 /* ssp_hash_algs<> */
1321 p += XDR_QUADLEN(dummy);
1324 /* ssp_encr_algs<> */
1331 p += XDR_QUADLEN(dummy);
1334 /* ssp_window and ssp_num_gss_handles */
1343 /* Ignore Implementation ID */
1344 READ_BUF(4); /* nfs_impl_id4 array length */
1355 p += XDR_QUADLEN(dummy);
1361 p += XDR_QUADLEN(dummy);
1371 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1372 struct nfsd4_create_session *sess)
1378 COPYMEM(&sess->clientid, 8);
1379 READ32(sess->seqid);
1380 READ32(sess->flags);
1382 /* Fore channel attrs */
1384 READ32(dummy); /* headerpadsz is always 0 */
1385 READ32(sess->fore_channel.maxreq_sz);
1386 READ32(sess->fore_channel.maxresp_sz);
1387 READ32(sess->fore_channel.maxresp_cached);
1388 READ32(sess->fore_channel.maxops);
1389 READ32(sess->fore_channel.maxreqs);
1390 READ32(sess->fore_channel.nr_rdma_attrs);
1391 if (sess->fore_channel.nr_rdma_attrs == 1) {
1393 READ32(sess->fore_channel.rdma_attrs);
1394 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1395 dprintk("Too many fore channel attr bitmaps!\n");
1399 /* Back channel attrs */
1401 READ32(dummy); /* headerpadsz is always 0 */
1402 READ32(sess->back_channel.maxreq_sz);
1403 READ32(sess->back_channel.maxresp_sz);
1404 READ32(sess->back_channel.maxresp_cached);
1405 READ32(sess->back_channel.maxops);
1406 READ32(sess->back_channel.maxreqs);
1407 READ32(sess->back_channel.nr_rdma_attrs);
1408 if (sess->back_channel.nr_rdma_attrs == 1) {
1410 READ32(sess->back_channel.rdma_attrs);
1411 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1412 dprintk("Too many back channel attr bitmaps!\n");
1417 READ32(sess->callback_prog);
1418 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1423 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1424 struct nfsd4_destroy_session *destroy_session)
1427 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1428 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1434 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1435 struct nfsd4_free_stateid *free_stateid)
1439 READ_BUF(sizeof(stateid_t));
1440 READ32(free_stateid->fr_stateid.si_generation);
1441 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1447 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1448 struct nfsd4_sequence *seq)
1452 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1453 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1455 READ32(seq->slotid);
1456 READ32(seq->maxslots);
1457 READ32(seq->cachethis);
1463 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1467 struct nfsd4_test_stateid_id *stateid;
1470 test_stateid->ts_num_ids = ntohl(*p++);
1472 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1474 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1475 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1477 status = nfserrno(-ENOMEM);
1481 defer_free(argp, kfree, stateid);
1482 INIT_LIST_HEAD(&stateid->ts_id_list);
1483 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1485 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1494 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1495 status = nfserr_bad_xdr;
1499 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1504 COPYMEM(&dc->clientid, 8);
1509 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1514 READ32(rc->rca_one_fs);
1520 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1526 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1528 return nfserr_notsupp;
1531 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1533 static nfsd4_dec nfsd4_dec_ops[] = {
1534 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1535 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1536 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1537 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1538 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1539 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1540 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1541 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1542 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1543 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1544 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1545 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1546 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1547 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1548 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1549 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1550 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1551 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1552 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1553 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1554 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1555 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1556 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1557 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1558 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1559 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1560 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1561 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1562 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1564 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1565 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1566 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1567 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1568 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1569 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1570 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1572 /* new operations for NFSv4.1 */
1573 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1574 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1575 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1576 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1577 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1578 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1579 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1580 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1586 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1587 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1588 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1589 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1590 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1591 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1595 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1597 if (op->opnum < FIRST_NFS4_OP)
1599 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1601 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1603 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1609 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1612 struct nfsd4_op *op;
1613 bool cachethis = false;
1614 int max_reply = 2 * RPC_MAX_AUTH_SIZE + 8; /* opcnt, status */
1618 READ32(argp->taglen);
1619 READ_BUF(argp->taglen + 8);
1620 SAVEMEM(argp->tag, argp->taglen);
1621 READ32(argp->minorversion);
1622 READ32(argp->opcnt);
1623 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1625 if (argp->taglen > NFSD4_MAX_TAGLEN)
1627 if (argp->opcnt > 100)
1630 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1631 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1633 argp->ops = argp->iops;
1634 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1639 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1642 for (i = 0; i < argp->opcnt; i++) {
1649 if (nfsd4_opnum_in_range(argp, op))
1650 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1652 op->opnum = OP_ILLEGAL;
1653 op->status = nfserr_op_illegal;
1656 * We'll try to cache the result in the DRC if any one
1657 * op in the compound wants to be cached:
1659 cachethis |= nfsd4_cache_this_op(op);
1661 max_reply += nfsd4_max_reply(argp->rqstp, op);
1668 /* Sessions make the DRC unnecessary: */
1669 if (argp->minorversion)
1671 svc_reserve(argp->rqstp, max_reply);
1672 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1677 #define WRITE32(n) *p++ = htonl(n)
1678 #define WRITE64(n) do { \
1679 *p++ = htonl((u32)((n) >> 32)); \
1680 *p++ = htonl((u32)(n)); \
1682 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1683 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1684 memcpy(p, ptr, nbytes); \
1685 p += XDR_QUADLEN(nbytes); \
1688 static void write32(__be32 **p, u32 n)
1693 static void write64(__be32 **p, u64 n)
1695 write32(p, (n >> 32));
1699 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1701 if (IS_I_VERSION(inode)) {
1702 write64(p, inode->i_version);
1704 write32(p, stat->ctime.tv_sec);
1705 write32(p, stat->ctime.tv_nsec);
1709 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1711 write32(p, c->atomic);
1712 if (c->change_supported) {
1713 write64(p, c->before_change);
1714 write64(p, c->after_change);
1716 write32(p, c->before_ctime_sec);
1717 write32(p, c->before_ctime_nsec);
1718 write32(p, c->after_ctime_sec);
1719 write32(p, c->after_ctime_nsec);
1723 /* Encode as an array of strings the string given with components
1724 * separated @sep, escaped with esc_enter and esc_exit.
1726 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1727 char *components, char esc_enter,
1733 int strlen, count=0;
1734 char *str, *end, *next;
1736 dprintk("nfsd4_encode_components(%s)\n", components);
1738 pathlen_offset = xdr->buf->len;
1739 p = xdr_reserve_space(xdr, 4);
1741 return nfserr_resource;
1742 p++; /* We will fill this in with @count later */
1744 end = str = components;
1746 bool found_esc = false;
1748 /* try to parse as esc_start, ..., esc_end, sep */
1749 if (*str == esc_enter) {
1750 for (; *end && (*end != esc_exit); end++)
1751 /* find esc_exit or end of string */;
1753 if (*end && (!*next || *next == sep)) {
1760 for (; *end && (*end != sep); end++)
1761 /* find sep or end of string */;
1765 p = xdr_reserve_space(xdr, strlen + 4);
1767 return nfserr_resource;
1769 WRITEMEM(str, strlen);
1776 pathlen = htonl(xdr->buf->len - pathlen_offset);
1777 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1781 /* Encode as an array of strings the string given with components
1784 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1787 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
1791 * encode a location element of a fs_locations structure
1793 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1794 struct nfsd4_fs_location *location)
1798 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
1802 status = nfsd4_encode_components(xdr, '/', location->path);
1809 * Encode a path in RFC3530 'pathname4' format
1811 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1812 const struct path *root,
1813 const struct path *path)
1815 struct path cur = *path;
1817 struct dentry **components = NULL;
1818 unsigned int ncomponents = 0;
1819 __be32 err = nfserr_jukebox;
1821 dprintk("nfsd4_encode_components(");
1824 /* First walk the path up to the nfsd root, and store the
1825 * dentries/path components in an array.
1828 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1830 if (cur.dentry == cur.mnt->mnt_root) {
1831 if (follow_up(&cur))
1835 if ((ncomponents & 15) == 0) {
1836 struct dentry **new;
1837 new = krealloc(components,
1838 sizeof(*new) * (ncomponents + 16),
1844 components[ncomponents++] = cur.dentry;
1845 cur.dentry = dget_parent(cur.dentry);
1847 err = nfserr_resource;
1848 p = xdr_reserve_space(xdr, 4);
1851 WRITE32(ncomponents);
1853 while (ncomponents) {
1854 struct dentry *dentry = components[ncomponents - 1];
1857 spin_lock(&dentry->d_lock);
1858 len = dentry->d_name.len;
1859 p = xdr_reserve_space(xdr, len + 4);
1861 spin_unlock(&dentry->d_lock);
1865 WRITEMEM(dentry->d_name.name, len);
1866 dprintk("/%s", dentry->d_name.name);
1867 spin_unlock(&dentry->d_lock);
1876 dput(components[--ncomponents]);
1882 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1883 struct svc_rqst *rqstp, const struct path *path)
1885 struct svc_export *exp_ps;
1888 exp_ps = rqst_find_fsidzero_export(rqstp);
1890 return nfserrno(PTR_ERR(exp_ps));
1891 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
1897 * encode a fs_locations structure
1899 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1900 struct svc_rqst *rqstp, struct svc_export *exp)
1905 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1907 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
1910 p = xdr_reserve_space(xdr, 4);
1912 return nfserr_resource;
1913 WRITE32(fslocs->locations_count);
1914 for (i=0; i<fslocs->locations_count; i++) {
1915 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
1922 static u32 nfs4_file_type(umode_t mode)
1924 switch (mode & S_IFMT) {
1925 case S_IFIFO: return NF4FIFO;
1926 case S_IFCHR: return NF4CHR;
1927 case S_IFDIR: return NF4DIR;
1928 case S_IFBLK: return NF4BLK;
1929 case S_IFLNK: return NF4LNK;
1930 case S_IFREG: return NF4REG;
1931 case S_IFSOCK: return NF4SOCK;
1932 default: return NF4BAD;
1936 static inline __be32
1937 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1938 struct nfs4_ace *ace)
1940 if (ace->whotype != NFS4_ACL_WHO_NAMED)
1941 return nfs4_acl_write_who(xdr, ace->whotype);
1942 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1943 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
1945 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1948 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1949 FATTR4_WORD0_RDATTR_ERROR)
1950 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1952 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1953 static inline __be32
1954 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1955 void *context, int len)
1959 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1961 return nfserr_resource;
1964 * For now we use a 0 here to indicate the null translation; in
1965 * the future we may place a call to translation code here.
1967 WRITE32(0); /* lfs */
1968 WRITE32(0); /* pi */
1969 p = xdr_encode_opaque(p, context, len);
1973 static inline __be32
1974 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1975 void *context, int len)
1979 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1981 /* As per referral draft: */
1982 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1983 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1984 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1985 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1986 *rdattr_err = NFSERR_MOVED;
1988 return nfserr_moved;
1990 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1991 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1996 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1998 struct path path = exp->ex_path;
2002 while (follow_up(&path)) {
2003 if (path.dentry != path.mnt->mnt_root)
2006 err = vfs_getattr(&path, stat);
2012 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2016 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2017 struct svc_export *exp,
2018 struct dentry *dentry, u32 *bmval,
2019 struct svc_rqst *rqstp, int ignore_crossmnt)
2021 u32 bmval0 = bmval[0];
2022 u32 bmval1 = bmval[1];
2023 u32 bmval2 = bmval[2];
2025 struct svc_fh *tempfh = NULL;
2026 struct kstatfs statfs;
2028 int starting_len = xdr->buf->len;
2037 struct nfs4_acl *acl = NULL;
2038 void *context = NULL;
2040 bool contextsupport = false;
2041 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2042 u32 minorversion = resp->cstate.minorversion;
2043 struct path path = {
2044 .mnt = exp->ex_path.mnt,
2047 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2049 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2050 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2051 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2052 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2054 if (exp->ex_fslocs.migrated) {
2056 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2061 err = vfs_getattr(&path, &stat);
2064 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2065 FATTR4_WORD0_MAXNAME)) ||
2066 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2067 FATTR4_WORD1_SPACE_TOTAL))) {
2068 err = vfs_statfs(&path, &statfs);
2072 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2073 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2074 status = nfserr_jukebox;
2077 fh_init(tempfh, NFS4_FHSIZE);
2078 status = fh_compose(tempfh, exp, dentry, NULL);
2083 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2084 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2085 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2086 aclsupport = (err == 0);
2087 if (bmval0 & FATTR4_WORD0_ACL) {
2088 if (err == -EOPNOTSUPP)
2089 bmval0 &= ~FATTR4_WORD0_ACL;
2090 else if (err == -EINVAL) {
2091 status = nfserr_attrnotsupp;
2093 } else if (err != 0)
2098 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2099 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2100 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2101 err = security_inode_getsecctx(dentry->d_inode,
2102 &context, &contextlen);
2103 contextsupport = (err == 0);
2104 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2105 if (err == -EOPNOTSUPP)
2106 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2111 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2114 p = xdr_reserve_space(xdr, 16);
2121 } else if (bmval1) {
2122 p = xdr_reserve_space(xdr, 12);
2129 p = xdr_reserve_space(xdr, 8);
2136 attrlen_offset = xdr->buf->len;
2137 p = xdr_reserve_space(xdr, 4);
2140 p++; /* to be backfilled later */
2142 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2143 u32 word0 = nfsd_suppattrs0(minorversion);
2144 u32 word1 = nfsd_suppattrs1(minorversion);
2145 u32 word2 = nfsd_suppattrs2(minorversion);
2148 word0 &= ~FATTR4_WORD0_ACL;
2149 if (!contextsupport)
2150 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2152 p = xdr_reserve_space(xdr, 12);
2159 p = xdr_reserve_space(xdr, 16);
2168 if (bmval0 & FATTR4_WORD0_TYPE) {
2169 p = xdr_reserve_space(xdr, 4);
2172 dummy = nfs4_file_type(stat.mode);
2173 if (dummy == NF4BAD) {
2174 status = nfserr_serverfault;
2179 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2180 p = xdr_reserve_space(xdr, 4);
2183 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2184 WRITE32(NFS4_FH_PERSISTENT);
2186 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
2188 if (bmval0 & FATTR4_WORD0_CHANGE) {
2189 p = xdr_reserve_space(xdr, 8);
2192 write_change(&p, &stat, dentry->d_inode);
2194 if (bmval0 & FATTR4_WORD0_SIZE) {
2195 p = xdr_reserve_space(xdr, 8);
2200 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2201 p = xdr_reserve_space(xdr, 4);
2206 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2207 p = xdr_reserve_space(xdr, 4);
2212 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2213 p = xdr_reserve_space(xdr, 4);
2218 if (bmval0 & FATTR4_WORD0_FSID) {
2219 p = xdr_reserve_space(xdr, 16);
2222 if (exp->ex_fslocs.migrated) {
2223 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2224 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2225 } else switch(fsid_source(fhp)) {
2226 case FSIDSOURCE_FSID:
2227 WRITE64((u64)exp->ex_fsid);
2230 case FSIDSOURCE_DEV:
2232 WRITE32(MAJOR(stat.dev));
2234 WRITE32(MINOR(stat.dev));
2236 case FSIDSOURCE_UUID:
2237 WRITEMEM(exp->ex_uuid, 16);
2241 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2242 p = xdr_reserve_space(xdr, 4);
2247 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2248 p = xdr_reserve_space(xdr, 4);
2251 WRITE32(nn->nfsd4_lease);
2253 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2254 p = xdr_reserve_space(xdr, 4);
2257 WRITE32(rdattr_err);
2259 if (bmval0 & FATTR4_WORD0_ACL) {
2260 struct nfs4_ace *ace;
2263 p = xdr_reserve_space(xdr, 4);
2270 p = xdr_reserve_space(xdr, 4);
2273 WRITE32(acl->naces);
2275 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2276 p = xdr_reserve_space(xdr, 4*3);
2281 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2282 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2288 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2289 p = xdr_reserve_space(xdr, 4);
2292 WRITE32(aclsupport ?
2293 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2295 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2296 p = xdr_reserve_space(xdr, 4);
2301 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2302 p = xdr_reserve_space(xdr, 4);
2307 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2308 p = xdr_reserve_space(xdr, 4);
2313 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2314 p = xdr_reserve_space(xdr, 4);
2319 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2320 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2323 WRITE32(fhp->fh_handle.fh_size);
2324 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2326 if (bmval0 & FATTR4_WORD0_FILEID) {
2327 p = xdr_reserve_space(xdr, 8);
2332 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2333 p = xdr_reserve_space(xdr, 8);
2336 WRITE64((u64) statfs.f_ffree);
2338 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2339 p = xdr_reserve_space(xdr, 8);
2342 WRITE64((u64) statfs.f_ffree);
2344 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2345 p = xdr_reserve_space(xdr, 8);
2348 WRITE64((u64) statfs.f_files);
2350 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2351 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2355 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2356 p = xdr_reserve_space(xdr, 4);
2361 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2362 p = xdr_reserve_space(xdr, 8);
2365 WRITE64(exp->ex_path.mnt->mnt_sb->s_maxbytes);
2367 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2368 p = xdr_reserve_space(xdr, 4);
2373 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2374 p = xdr_reserve_space(xdr, 4);
2377 WRITE32(statfs.f_namelen);
2379 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2380 p = xdr_reserve_space(xdr, 8);
2383 WRITE64((u64) svc_max_payload(rqstp));
2385 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2386 p = xdr_reserve_space(xdr, 8);
2389 WRITE64((u64) svc_max_payload(rqstp));
2391 if (bmval1 & FATTR4_WORD1_MODE) {
2392 p = xdr_reserve_space(xdr, 4);
2395 WRITE32(stat.mode & S_IALLUGO);
2397 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2398 p = xdr_reserve_space(xdr, 4);
2403 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2404 p = xdr_reserve_space(xdr, 4);
2407 WRITE32(stat.nlink);
2409 if (bmval1 & FATTR4_WORD1_OWNER) {
2410 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2414 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2415 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2419 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2420 p = xdr_reserve_space(xdr, 8);
2423 WRITE32((u32) MAJOR(stat.rdev));
2424 WRITE32((u32) MINOR(stat.rdev));
2426 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2427 p = xdr_reserve_space(xdr, 8);
2430 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2433 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2434 p = xdr_reserve_space(xdr, 8);
2437 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2440 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2441 p = xdr_reserve_space(xdr, 8);
2444 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2447 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2448 p = xdr_reserve_space(xdr, 8);
2451 dummy64 = (u64)stat.blocks << 9;
2454 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2455 p = xdr_reserve_space(xdr, 12);
2458 WRITE64((s64)stat.atime.tv_sec);
2459 WRITE32(stat.atime.tv_nsec);
2461 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2462 p = xdr_reserve_space(xdr, 12);
2469 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2470 p = xdr_reserve_space(xdr, 12);
2473 WRITE64((s64)stat.ctime.tv_sec);
2474 WRITE32(stat.ctime.tv_nsec);
2476 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2477 p = xdr_reserve_space(xdr, 12);
2480 WRITE64((s64)stat.mtime.tv_sec);
2481 WRITE32(stat.mtime.tv_nsec);
2483 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2484 p = xdr_reserve_space(xdr, 8);
2488 * Get parent's attributes if not ignoring crossmount
2489 * and this is the root of a cross-mounted filesystem.
2491 if (ignore_crossmnt == 0 &&
2492 dentry == exp->ex_path.mnt->mnt_root)
2493 get_parent_attributes(exp, &stat);
2496 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2497 status = nfsd4_encode_security_label(xdr, rqstp, context,
2502 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2503 p = xdr_reserve_space(xdr, 16);
2507 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2508 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2509 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2512 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2513 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2517 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2519 security_release_secctx(context, contextlen);
2520 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2527 xdr_truncate_encode(xdr, starting_len);
2530 status = nfserrno(err);
2533 status = nfserr_resource;
2537 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2538 struct xdr_buf *buf, __be32 *p, int bytes)
2540 xdr->scratch.iov_len = 0;
2541 memset(buf, 0, sizeof(struct xdr_buf));
2542 buf->head[0].iov_base = p;
2543 buf->head[0].iov_len = 0;
2546 xdr->iov = buf->head;
2548 xdr->end = (void *)p + bytes;
2549 buf->buflen = bytes;
2552 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2553 struct svc_fh *fhp, struct svc_export *exp,
2554 struct dentry *dentry, u32 *bmval,
2555 struct svc_rqst *rqstp, int ignore_crossmnt)
2557 struct xdr_buf dummy;
2558 struct xdr_stream xdr;
2561 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2562 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2568 static inline int attributes_need_mount(u32 *bmval)
2570 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2572 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2578 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2579 const char *name, int namlen, __be32 **p, int buflen)
2581 struct svc_export *exp = cd->rd_fhp->fh_export;
2582 struct dentry *dentry;
2584 int ignore_crossmnt = 0;
2586 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2588 return nfserrno(PTR_ERR(dentry));
2589 if (!dentry->d_inode) {
2591 * nfsd_buffered_readdir drops the i_mutex between
2592 * readdir and calling this callback, leaving a window
2593 * where this directory entry could have gone away.
2596 return nfserr_noent;
2601 * In the case of a mountpoint, the client may be asking for
2602 * attributes that are only properties of the underlying filesystem
2603 * as opposed to the cross-mounted file system. In such a case,
2604 * we will not follow the cross mount and will fill the attribtutes
2605 * directly from the mountpoint dentry.
2607 if (nfsd_mountpoint(dentry, exp)) {
2610 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2611 && !attributes_need_mount(cd->rd_bmval)) {
2612 ignore_crossmnt = 1;
2616 * Why the heck aren't we just using nfsd_lookup??
2617 * Different "."/".." handling? Something else?
2618 * At least, add a comment here to explain....
2620 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2622 nfserr = nfserrno(err);
2625 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2631 nfserr = nfsd4_encode_fattr_to_buf(p, buflen, NULL, exp, dentry,
2633 cd->rd_rqstp, ignore_crossmnt);
2641 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2646 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2647 *p++ = htonl(0); /* bmval1 */
2649 *p++ = htonl(4); /* attribute length */
2650 *p++ = nfserr; /* no htonl */
2655 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2656 loff_t offset, u64 ino, unsigned int d_type)
2658 struct readdir_cd *ccd = ccdv;
2659 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2661 __be32 *p = cd->buffer;
2663 __be32 nfserr = nfserr_toosmall;
2665 /* In nfsv4, "." and ".." never make it onto the wire.. */
2666 if (name && isdotent(name, namlen)) {
2667 cd->common.err = nfs_ok;
2672 xdr_encode_hyper(cd->offset, (u64) offset);
2674 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2678 *p++ = xdr_one; /* mark entry present */
2680 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2681 p = xdr_encode_array(p, name, namlen); /* name length & name */
2683 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, &p, buflen);
2687 case nfserr_resource:
2688 nfserr = nfserr_toosmall;
2694 * If the client requested the RDATTR_ERROR attribute,
2695 * we stuff the error code into this attribute
2696 * and continue. If this attribute was not requested,
2697 * then in accordance with the spec, we fail the
2698 * entire READDIR operation(!)
2700 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2702 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2704 nfserr = nfserr_toosmall;
2708 cd->buflen -= (p - cd->buffer);
2710 cd->offset = cookiep;
2712 cd->common.err = nfs_ok;
2715 cd->common.err = nfserr;
2720 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
2724 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2726 return nfserr_resource;
2727 WRITE32(sid->si_generation);
2728 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2733 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2735 struct xdr_stream *xdr = &resp->xdr;
2739 p = xdr_reserve_space(xdr, 8);
2741 return nfserr_resource;
2742 WRITE32(access->ac_supported);
2743 WRITE32(access->ac_resp_access);
2748 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2750 struct xdr_stream *xdr = &resp->xdr;
2754 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2756 return nfserr_resource;
2757 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2759 /* Sorry, we do not yet support RDMA over 4.1: */
2766 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2768 struct xdr_stream *xdr = &resp->xdr;
2771 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
2778 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2780 struct xdr_stream *xdr = &resp->xdr;
2784 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2786 return nfserr_resource;
2787 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
2793 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2795 struct xdr_stream *xdr = &resp->xdr;
2799 p = xdr_reserve_space(xdr, 32);
2801 return nfserr_resource;
2802 write_cinfo(&p, &create->cr_cinfo);
2804 WRITE32(create->cr_bmval[0]);
2805 WRITE32(create->cr_bmval[1]);
2811 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2813 struct svc_fh *fhp = getattr->ga_fhp;
2814 struct xdr_stream *xdr = &resp->xdr;
2819 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2826 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2828 struct xdr_stream *xdr = &resp->xdr;
2829 struct svc_fh *fhp = *fhpp;
2834 len = fhp->fh_handle.fh_size;
2835 p = xdr_reserve_space(xdr, len + 4);
2837 return nfserr_resource;
2839 WRITEMEM(&fhp->fh_handle.fh_base, len);
2845 * Including all fields other than the name, a LOCK4denied structure requires
2846 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2849 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
2851 struct xdr_netobj *conf = &ld->ld_owner;
2855 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
2858 * Don't fail to return the result just because we can't
2859 * return the conflicting open:
2866 return nfserr_resource;
2868 WRITE64(ld->ld_start);
2869 WRITE64(ld->ld_length);
2870 WRITE32(ld->ld_type);
2872 WRITEMEM(&ld->ld_clientid, 8);
2874 WRITEMEM(conf->data, conf->len);
2875 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2876 WRITE64((u64)0); /* clientid */
2877 WRITE32(0); /* length of owner name */
2879 return nfserr_denied;
2883 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2885 struct xdr_stream *xdr = &resp->xdr;
2888 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
2889 else if (nfserr == nfserr_denied)
2890 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
2891 kfree(lock->lk_denied.ld_owner.data);
2896 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2898 struct xdr_stream *xdr = &resp->xdr;
2900 if (nfserr == nfserr_denied)
2901 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
2906 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2908 struct xdr_stream *xdr = &resp->xdr;
2911 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
2918 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2920 struct xdr_stream *xdr = &resp->xdr;
2924 p = xdr_reserve_space(xdr, 20);
2926 return nfserr_resource;
2927 write_cinfo(&p, &link->li_cinfo);
2934 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2936 struct xdr_stream *xdr = &resp->xdr;
2942 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2945 p = xdr_reserve_space(xdr, 40);
2947 return nfserr_resource;
2948 write_cinfo(&p, &open->op_cinfo);
2949 WRITE32(open->op_rflags);
2951 WRITE32(open->op_bmval[0]);
2952 WRITE32(open->op_bmval[1]);
2953 WRITE32(open->op_delegate_type);
2955 switch (open->op_delegate_type) {
2956 case NFS4_OPEN_DELEGATE_NONE:
2958 case NFS4_OPEN_DELEGATE_READ:
2959 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2962 p = xdr_reserve_space(xdr, 20);
2964 return nfserr_resource;
2965 WRITE32(open->op_recall);
2968 * TODO: ACE's in delegations
2970 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2973 WRITE32(0); /* XXX: is NULL principal ok? */
2975 case NFS4_OPEN_DELEGATE_WRITE:
2976 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2979 p = xdr_reserve_space(xdr, 32);
2981 return nfserr_resource;
2985 * TODO: space_limit's in delegations
2987 WRITE32(NFS4_LIMIT_SIZE);
2992 * TODO: ACE's in delegations
2994 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2997 WRITE32(0); /* XXX: is NULL principal ok? */
2999 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3000 switch (open->op_why_no_deleg) {
3001 case WND4_CONTENTION:
3003 p = xdr_reserve_space(xdr, 8);
3005 return nfserr_resource;
3006 WRITE32(open->op_why_no_deleg);
3007 WRITE32(0); /* deleg signaling not supported yet */
3010 p = xdr_reserve_space(xdr, 4);
3012 return nfserr_resource;
3013 WRITE32(open->op_why_no_deleg);
3019 /* XXX save filehandle here */
3025 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3027 struct xdr_stream *xdr = &resp->xdr;
3030 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3036 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3038 struct xdr_stream *xdr = &resp->xdr;
3041 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3047 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3048 struct nfsd4_read *read)
3053 unsigned long maxcount;
3054 struct xdr_stream *xdr = &resp->xdr;
3055 int starting_len = xdr->buf->len;
3063 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3065 return nfserr_resource;
3067 /* Make sure there will be room for padding if needed: */
3068 if (xdr->end - xdr->p < 1)
3069 return nfserr_resource;
3071 if (resp->xdr.buf->page_len)
3072 return nfserr_resource;
3074 maxcount = svc_max_payload(resp->rqstp);
3075 if (maxcount > read->rd_length)
3076 maxcount = read->rd_length;
3083 page = *(resp->rqstp->rq_next_page);
3084 if (!page) { /* ran out of pages */
3088 thislen = min_t(long, len, PAGE_SIZE);
3089 resp->rqstp->rq_vec[v].iov_base = page_address(page);
3090 resp->rqstp->rq_vec[v].iov_len = thislen;
3091 resp->rqstp->rq_next_page++;
3097 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
3098 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
3103 * nfsd_splice_actor may have already messed with the
3104 * page length; reset it so as not to confuse
3105 * xdr_truncate_encode:
3107 xdr->buf->page_len = 0;
3108 xdr_truncate_encode(xdr, starting_len);
3111 eof = (read->rd_offset + maxcount >=
3112 read->rd_fhp->fh_dentry->d_inode->i_size);
3116 WARN_ON_ONCE(resp->xdr.buf->head[0].iov_len != (char *)p
3117 - (char *)resp->xdr.buf->head[0].iov_base);
3118 resp->xdr.buf->page_len = maxcount;
3119 xdr->buf->len += maxcount;
3121 xdr->iov = xdr->buf->tail;
3123 /* Use rest of head for padding and remaining ops: */
3124 resp->xdr.buf->tail[0].iov_base = p;
3125 resp->xdr.buf->tail[0].iov_len = 0;
3127 p = xdr_reserve_space(xdr, 4);
3129 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3130 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
3131 xdr->buf->len -= (maxcount&3);
3134 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3135 xdr->buf->buflen - xdr->buf->len);
3136 xdr->buf->buflen = xdr->buf->len + space_left;
3137 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3143 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3146 struct xdr_stream *xdr = &resp->xdr;
3148 int length_offset = xdr->buf->len;
3154 p = xdr_reserve_space(xdr, 4);
3156 return nfserr_resource;
3158 if (resp->xdr.buf->page_len)
3159 return nfserr_resource;
3160 if (!*resp->rqstp->rq_next_page)
3161 return nfserr_resource;
3163 page = page_address(*(resp->rqstp->rq_next_page++));
3165 maxcount = PAGE_SIZE;
3167 if (xdr->end - xdr->p < 1)
3168 return nfserr_resource;
3171 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3172 * if they would overflow the buffer. Is this kosher in NFSv4? If
3173 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3174 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3176 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3177 if (nfserr == nfserr_isdir)
3178 nfserr = nfserr_inval;
3180 xdr_truncate_encode(xdr, length_offset);
3185 resp->xdr.buf->head[0].iov_len = (char *)p
3186 - (char *)resp->xdr.buf->head[0].iov_base;
3187 resp->xdr.buf->page_len = maxcount;
3188 xdr->buf->len += maxcount;
3190 xdr->buf->buflen -= PAGE_SIZE;
3191 xdr->iov = xdr->buf->tail;
3193 /* Use rest of head for padding and remaining ops: */
3194 resp->xdr.buf->tail[0].iov_base = p;
3195 resp->xdr.buf->tail[0].iov_len = 0;
3197 p = xdr_reserve_space(xdr, 4);
3199 resp->xdr.buf->tail[0].iov_base += maxcount&3;
3200 resp->xdr.buf->tail[0].iov_len = 4 - (maxcount&3);
3206 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3210 struct xdr_stream *xdr = &resp->xdr;
3211 int starting_len = xdr->buf->len;
3212 __be32 *page, *tailbase;
3218 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3220 return nfserr_resource;
3222 if (resp->xdr.buf->page_len)
3223 return nfserr_resource;
3224 if (!*resp->rqstp->rq_next_page)
3225 return nfserr_resource;
3227 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3230 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3231 - (char *)resp->xdr.buf->head[0].iov_base;
3234 maxcount = PAGE_SIZE;
3235 if (maxcount > readdir->rd_maxcount)
3236 maxcount = readdir->rd_maxcount;
3239 * Convert from bytes to words, account for the two words already
3240 * written, make sure to leave two words at the end for the next
3241 * pointer and eof field.
3243 maxcount = (maxcount >> 2) - 4;
3245 nfserr = nfserr_toosmall;
3249 page = page_address(*(resp->rqstp->rq_next_page++));
3250 readdir->common.err = 0;
3251 readdir->buflen = maxcount;
3252 readdir->buffer = page;
3253 readdir->offset = NULL;
3255 offset = readdir->rd_cookie;
3256 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3258 &readdir->common, nfsd4_encode_dirent);
3259 if (nfserr == nfs_ok &&
3260 readdir->common.err == nfserr_toosmall &&
3261 readdir->buffer == page)
3262 nfserr = nfserr_toosmall;
3266 if (readdir->offset)
3267 xdr_encode_hyper(readdir->offset, offset);
3269 p = readdir->buffer;
3270 *p++ = 0; /* no more entries */
3271 *p++ = htonl(readdir->common.err == nfserr_eof);
3272 resp->xdr.buf->page_len = ((char *)p) -
3273 (char*)page_address(*(resp->rqstp->rq_next_page-1));
3274 xdr->buf->len += xdr->buf->page_len;
3276 xdr->iov = xdr->buf->tail;
3279 xdr->buf->buflen -= PAGE_SIZE;
3280 xdr->iov = xdr->buf->tail;
3282 /* Use rest of head for padding and remaining ops: */
3283 resp->xdr.buf->tail[0].iov_base = tailbase;
3284 resp->xdr.buf->tail[0].iov_len = 0;
3285 resp->xdr.p = resp->xdr.buf->tail[0].iov_base;
3286 resp->xdr.end = resp->xdr.p +
3287 (PAGE_SIZE - resp->xdr.buf->head[0].iov_len)/4;
3291 xdr_truncate_encode(xdr, starting_len);
3296 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3298 struct xdr_stream *xdr = &resp->xdr;
3302 p = xdr_reserve_space(xdr, 20);
3304 return nfserr_resource;
3305 write_cinfo(&p, &remove->rm_cinfo);
3311 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3313 struct xdr_stream *xdr = &resp->xdr;
3317 p = xdr_reserve_space(xdr, 40);
3319 return nfserr_resource;
3320 write_cinfo(&p, &rename->rn_sinfo);
3321 write_cinfo(&p, &rename->rn_tinfo);
3327 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3328 __be32 nfserr, struct svc_export *exp)
3330 u32 i, nflavs, supported;
3331 struct exp_flavor_info *flavs;
3332 struct exp_flavor_info def_flavs[2];
3333 __be32 *p, *flavorsp;
3334 static bool report = true;
3338 nfserr = nfserr_resource;
3339 if (exp->ex_nflavors) {
3340 flavs = exp->ex_flavors;
3341 nflavs = exp->ex_nflavors;
3342 } else { /* Handling of some defaults in absence of real secinfo: */
3344 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3346 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3347 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3348 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3350 flavs[0].pseudoflavor
3351 = svcauth_gss_flavor(exp->ex_client);
3354 flavs[0].pseudoflavor
3355 = exp->ex_client->flavour->flavour;
3360 p = xdr_reserve_space(xdr, 4);
3363 flavorsp = p++; /* to be backfilled later */
3365 for (i = 0; i < nflavs; i++) {
3366 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3367 struct rpcsec_gss_info info;
3369 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3371 p = xdr_reserve_space(xdr, 4 + 4 +
3372 XDR_LEN(info.oid.len) + 4 + 4);
3375 WRITE32(RPC_AUTH_GSS);
3376 WRITE32(info.oid.len);
3377 WRITEMEM(info.oid.data, info.oid.len);
3379 WRITE32(info.service);
3380 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3382 p = xdr_reserve_space(xdr, 4);
3388 pr_warn("NFS: SECINFO: security flavor %u "
3389 "is not supported\n", pf);
3393 if (nflavs != supported)
3395 *flavorsp = htonl(supported);
3404 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3405 struct nfsd4_secinfo *secinfo)
3407 struct xdr_stream *xdr = &resp->xdr;
3409 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3413 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3414 struct nfsd4_secinfo_no_name *secinfo)
3416 struct xdr_stream *xdr = &resp->xdr;
3418 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3422 * The SETATTR encode routine is special -- it always encodes a bitmap,
3423 * regardless of the error status.
3426 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3428 struct xdr_stream *xdr = &resp->xdr;
3431 p = xdr_reserve_space(xdr, 16);
3433 return nfserr_resource;
3442 WRITE32(setattr->sa_bmval[0]);
3443 WRITE32(setattr->sa_bmval[1]);
3444 WRITE32(setattr->sa_bmval[2]);
3450 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3452 struct xdr_stream *xdr = &resp->xdr;
3456 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3458 return nfserr_resource;
3459 WRITEMEM(&scd->se_clientid, 8);
3460 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
3462 else if (nfserr == nfserr_clid_inuse) {
3463 p = xdr_reserve_space(xdr, 8);
3465 return nfserr_resource;
3473 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3475 struct xdr_stream *xdr = &resp->xdr;
3479 p = xdr_reserve_space(xdr, 16);
3481 return nfserr_resource;
3482 WRITE32(write->wr_bytes_written);
3483 WRITE32(write->wr_how_written);
3484 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
3489 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3490 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3491 1 << (OP_EXCHANGE_ID - 32) |
3492 1 << (OP_CREATE_SESSION - 32) |
3493 1 << (OP_DESTROY_SESSION - 32) |
3494 1 << (OP_DESTROY_CLIENTID - 32)
3498 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3499 struct nfsd4_exchange_id *exid)
3501 struct xdr_stream *xdr = &resp->xdr;
3506 int server_scope_sz;
3507 uint64_t minor_id = 0;
3512 major_id = utsname()->nodename;
3513 major_id_sz = strlen(major_id);
3514 server_scope = utsname()->nodename;
3515 server_scope_sz = strlen(server_scope);
3517 p = xdr_reserve_space(xdr,
3518 8 /* eir_clientid */ +
3519 4 /* eir_sequenceid */ +
3523 return nfserr_resource;
3525 WRITEMEM(&exid->clientid, 8);
3526 WRITE32(exid->seqid);
3527 WRITE32(exid->flags);
3529 WRITE32(exid->spa_how);
3531 switch (exid->spa_how) {
3535 /* spo_must_enforce, spo_must_allow */
3536 p = xdr_reserve_space(xdr, 16);
3538 return nfserr_resource;
3540 /* spo_must_enforce bitmap: */
3542 WRITE32(nfs4_minimal_spo_must_enforce[0]);
3543 WRITE32(nfs4_minimal_spo_must_enforce[1]);
3544 /* empty spo_must_allow bitmap: */
3552 p = xdr_reserve_space(xdr,
3553 8 /* so_minor_id */ +
3554 4 /* so_major_id.len */ +
3555 (XDR_QUADLEN(major_id_sz) * 4) +
3556 4 /* eir_server_scope.len */ +
3557 (XDR_QUADLEN(server_scope_sz) * 4) +
3558 4 /* eir_server_impl_id.count (0) */);
3560 return nfserr_resource;
3562 /* The server_owner struct */
3563 WRITE64(minor_id); /* Minor id */
3565 WRITE32(major_id_sz);
3566 WRITEMEM(major_id, major_id_sz);
3569 WRITE32(server_scope_sz);
3570 WRITEMEM(server_scope, server_scope_sz);
3572 /* Implementation id */
3573 WRITE32(0); /* zero length nfs_impl_id4 array */
3578 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3579 struct nfsd4_create_session *sess)
3581 struct xdr_stream *xdr = &resp->xdr;
3587 p = xdr_reserve_space(xdr, 24);
3589 return nfserr_resource;
3590 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3591 WRITE32(sess->seqid);
3592 WRITE32(sess->flags);
3594 p = xdr_reserve_space(xdr, 28);
3596 return nfserr_resource;
3597 WRITE32(0); /* headerpadsz */
3598 WRITE32(sess->fore_channel.maxreq_sz);
3599 WRITE32(sess->fore_channel.maxresp_sz);
3600 WRITE32(sess->fore_channel.maxresp_cached);
3601 WRITE32(sess->fore_channel.maxops);
3602 WRITE32(sess->fore_channel.maxreqs);
3603 WRITE32(sess->fore_channel.nr_rdma_attrs);
3605 if (sess->fore_channel.nr_rdma_attrs) {
3606 p = xdr_reserve_space(xdr, 4);
3608 return nfserr_resource;
3609 WRITE32(sess->fore_channel.rdma_attrs);
3612 p = xdr_reserve_space(xdr, 28);
3614 return nfserr_resource;
3615 WRITE32(0); /* headerpadsz */
3616 WRITE32(sess->back_channel.maxreq_sz);
3617 WRITE32(sess->back_channel.maxresp_sz);
3618 WRITE32(sess->back_channel.maxresp_cached);
3619 WRITE32(sess->back_channel.maxops);
3620 WRITE32(sess->back_channel.maxreqs);
3621 WRITE32(sess->back_channel.nr_rdma_attrs);
3623 if (sess->back_channel.nr_rdma_attrs) {
3624 p = xdr_reserve_space(xdr, 4);
3626 return nfserr_resource;
3627 WRITE32(sess->back_channel.rdma_attrs);
3633 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3634 struct nfsd4_sequence *seq)
3636 struct xdr_stream *xdr = &resp->xdr;
3642 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3644 return nfserr_resource;
3645 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3646 WRITE32(seq->seqid);
3647 WRITE32(seq->slotid);
3648 /* Note slotid's are numbered from zero: */
3649 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3650 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3651 WRITE32(seq->status_flags);
3653 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
3658 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3659 struct nfsd4_test_stateid *test_stateid)
3661 struct xdr_stream *xdr = &resp->xdr;
3662 struct nfsd4_test_stateid_id *stateid, *next;
3668 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3670 return nfserr_resource;
3671 *p++ = htonl(test_stateid->ts_num_ids);
3673 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3674 *p++ = stateid->ts_id_status;
3681 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3686 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3689 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3690 * since we don't need to filter out obsolete ops as this is
3691 * done in the decoding phase.
3693 static nfsd4_enc nfsd4_enc_ops[] = {
3694 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3695 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3696 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3697 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3698 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3699 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3700 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3701 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3702 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3703 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3704 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3705 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3706 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3707 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3708 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3709 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3710 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3711 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3712 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3713 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3714 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3715 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3716 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3717 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3718 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3719 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3720 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3721 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3722 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3723 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3724 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3725 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3726 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3727 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3728 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3729 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3730 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3732 /* NFSv4.1 operations */
3733 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3734 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3735 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3736 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3737 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3738 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3739 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3740 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3741 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3742 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3743 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3744 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3745 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3746 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3747 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3748 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3749 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3750 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3751 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3755 * Calculate whether we still have space to encode repsize bytes.
3756 * There are two considerations:
3757 * - For NFS versions >=4.1, the size of the reply must stay within
3759 * - For all NFS versions, we must stay within limited preallocated
3762 * This is called before the operation is processed, so can only provide
3763 * an upper estimate. For some nonidempotent operations (such as
3764 * getattr), it's not necessarily a problem if that estimate is wrong,
3765 * as we can fail it after processing without significant side effects.
3767 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
3769 struct xdr_buf *buf = &resp->rqstp->rq_res;
3770 struct nfsd4_session *session = resp->cstate.session;
3772 if (nfsd4_has_session(&resp->cstate)) {
3773 struct nfsd4_slot *slot = resp->cstate.slot;
3775 if (buf->len + respsize > session->se_fchannel.maxresp_sz)
3776 return nfserr_rep_too_big;
3778 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
3779 buf->len + respsize > session->se_fchannel.maxresp_cached)
3780 return nfserr_rep_too_big_to_cache;
3783 if (buf->len + respsize > buf->buflen) {
3784 WARN_ON_ONCE(nfsd4_has_session(&resp->cstate));
3785 return nfserr_resource;
3792 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3794 struct xdr_stream *xdr = &resp->xdr;
3795 struct nfs4_stateowner *so = resp->cstate.replay_owner;
3796 struct svc_rqst *rqstp = resp->rqstp;
3797 int post_err_offset;
3801 p = xdr_reserve_space(xdr, 8);
3807 post_err_offset = xdr->buf->len;
3809 if (op->opnum == OP_ILLEGAL)
3811 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3812 !nfsd4_enc_ops[op->opnum]);
3813 encoder = nfsd4_enc_ops[op->opnum];
3814 op->status = encoder(resp, op->status, &op->u);
3815 xdr_commit_encode(xdr);
3817 /* nfsd4_check_resp_size guarantees enough room for error status */
3819 int space_needed = 0;
3820 if (!nfsd4_last_compound_op(rqstp))
3821 space_needed = COMPOUND_ERR_SLACK_SPACE;
3822 op->status = nfsd4_check_resp_size(resp, space_needed);
3824 if (op->status == nfserr_resource ||
3825 op->status == nfserr_rep_too_big ||
3826 op->status == nfserr_rep_too_big_to_cache) {
3828 * The operation may have already been encoded or
3829 * partially encoded. No op returns anything additional
3830 * in the case of one of these three errors, so we can
3831 * just truncate back to after the status. But it's a
3832 * bug if we had to do this on a non-idempotent op:
3834 warn_on_nonidempotent_op(op);
3835 xdr_truncate_encode(xdr, post_err_offset);
3838 int len = xdr->buf->len - post_err_offset;
3840 so->so_replay.rp_status = op->status;
3841 so->so_replay.rp_buflen = len;
3842 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3843 so->so_replay.rp_buf, len);
3846 /* Note that op->status is already in network byte order: */
3847 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
3851 * Encode the reply stored in the stateowner reply cache
3853 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3854 * previously sent already encoded operation.
3856 * called with nfs4_lock_state() held
3859 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
3862 struct nfs4_replay *rp = op->replay;
3866 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3872 *p++ = rp->rp_status; /* already xdr'ed */
3874 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3878 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3880 return xdr_ressize_check(rqstp, p);
3883 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3885 struct svc_rqst *rqstp = rq;
3886 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3888 if (args->ops != args->iops) {
3890 args->ops = args->iops;
3894 while (args->to_free) {
3895 struct tmpbuf *tb = args->to_free;
3896 args->to_free = tb->next;
3897 tb->release(tb->buf);
3904 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3906 if (rqstp->rq_arg.head[0].iov_len % 4) {
3907 /* client is nuts */
3908 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3909 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3913 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3914 args->pagelist = rqstp->rq_arg.pages;
3915 args->pagelen = rqstp->rq_arg.page_len;
3917 args->to_free = NULL;
3918 args->ops = args->iops;
3919 args->rqstp = rqstp;
3921 return !nfsd4_decode_compound(args);
3925 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3928 * All that remains is to write the tag and operation count...
3930 struct nfsd4_compound_state *cs = &resp->cstate;
3931 struct xdr_buf *buf = resp->xdr.buf;
3933 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
3934 buf->tail[0].iov_len);
3936 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
3939 *p++ = htonl(resp->taglen);
3940 memcpy(p, resp->tag, resp->taglen);
3941 p += XDR_QUADLEN(resp->taglen);
3942 *p++ = htonl(resp->opcnt);
3944 if (nfsd4_has_session(cs)) {
3945 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
3946 struct nfs4_client *clp = cs->session->se_client;
3947 if (cs->status != nfserr_replay_cache) {
3948 nfsd4_store_cache_entry(resp);
3949 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3951 /* Renew the clientid on success and on replay */
3952 spin_lock(&nn->client_lock);
3953 nfsd4_put_session(cs->session);
3954 spin_unlock(&nn->client_lock);
3955 put_client_renew(clp);