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 READ64(x) do { \
102 (x) = (u64)ntohl(*p++) << 32; \
103 (x) |= ntohl(*p++); \
105 #define READMEM(x,nbytes) do { \
107 p += XDR_QUADLEN(nbytes); \
109 #define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
117 p += XDR_QUADLEN(nbytes); \
119 #define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125 #define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
136 static void next_decode_page(struct nfsd4_compoundargs *argp)
138 argp->p = page_address(argp->pagelist[0]);
140 if (argp->pagelen < PAGE_SIZE) {
141 argp->end = argp->p + (argp->pagelen>>2);
144 argp->end = argp->p + (PAGE_SIZE>>2);
145 argp->pagelen -= PAGE_SIZE;
149 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
151 /* We want more bytes than seem to be available.
152 * Maybe we need a new page, maybe we have just run out
154 unsigned int avail = (char *)argp->end - (char *)argp->p;
156 if (avail + argp->pagelen < nbytes)
158 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
160 /* ok, we can do it with the current plus the next page */
161 if (nbytes <= sizeof(argp->tmp))
165 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
171 * The following memcpy is safe because read_buf is always
172 * called with nbytes > avail, and the two cases above both
173 * guarantee p points to at least nbytes bytes.
175 memcpy(p, argp->p, avail);
176 next_decode_page(argp);
177 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
178 argp->p += XDR_QUADLEN(nbytes - avail);
182 static int zero_clientid(clientid_t *clid)
184 return (clid->cl_boot == 0) && (clid->cl_id == 0);
188 * defer_free - mark an allocation as deferred freed
189 * @argp: NFSv4 compound argument structure to be freed with
190 * @release: release callback to free @p, typically kfree()
191 * @p: pointer to be freed
193 * Marks @p to be freed when processing the compound operation
194 * described in @argp finishes.
197 defer_free(struct nfsd4_compoundargs *argp,
198 void (*release)(const void *), void *p)
202 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
206 tb->release = release;
207 tb->next = argp->to_free;
213 * savemem - duplicate a chunk of memory for later processing
214 * @argp: NFSv4 compound argument structure to be freed with
215 * @p: pointer to be duplicated
216 * @nbytes: length to be duplicated
218 * Returns a pointer to a copy of @nbytes bytes of memory at @p
219 * that are preserved until processing of the NFSv4 compound
220 * operation described by @argp finishes.
222 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
224 if (p == argp->tmp) {
225 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
229 BUG_ON(p != argp->tmpp);
232 if (defer_free(argp, kfree, p)) {
240 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
250 bmlen = be32_to_cpup(p++);
254 READ_BUF(bmlen << 2);
256 bmval[0] = be32_to_cpup(p++);
258 bmval[1] = be32_to_cpup(p++);
260 bmval[2] = be32_to_cpup(p++);
266 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
267 struct iattr *iattr, struct nfs4_acl **acl,
268 struct xdr_netobj *label)
270 int expected_len, len = 0;
276 if ((status = nfsd4_decode_bitmap(argp, bmval)))
280 expected_len = be32_to_cpup(p++);
282 if (bmval[0] & FATTR4_WORD0_SIZE) {
285 READ64(iattr->ia_size);
286 iattr->ia_valid |= ATTR_SIZE;
288 if (bmval[0] & FATTR4_WORD0_ACL) {
290 struct nfs4_ace *ace;
292 READ_BUF(4); len += 4;
293 nace = be32_to_cpup(p++);
295 if (nace > NFS4_ACL_MAX)
298 *acl = nfs4_acl_new(nace);
300 return nfserr_jukebox;
302 defer_free(argp, kfree, *acl);
304 (*acl)->naces = nace;
305 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
306 READ_BUF(16); len += 16;
307 ace->type = be32_to_cpup(p++);
308 ace->flag = be32_to_cpup(p++);
309 ace->access_mask = be32_to_cpup(p++);
310 dummy32 = be32_to_cpup(p++);
312 len += XDR_QUADLEN(dummy32) << 2;
313 READMEM(buf, dummy32);
314 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
316 if (ace->whotype != NFS4_ACL_WHO_NAMED)
318 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
319 status = nfsd_map_name_to_gid(argp->rqstp,
320 buf, dummy32, &ace->who_gid);
322 status = nfsd_map_name_to_uid(argp->rqstp,
323 buf, dummy32, &ace->who_uid);
329 if (bmval[1] & FATTR4_WORD1_MODE) {
332 iattr->ia_mode = be32_to_cpup(p++);
333 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
334 iattr->ia_valid |= ATTR_MODE;
336 if (bmval[1] & FATTR4_WORD1_OWNER) {
339 dummy32 = be32_to_cpup(p++);
341 len += (XDR_QUADLEN(dummy32) << 2);
342 READMEM(buf, dummy32);
343 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
345 iattr->ia_valid |= ATTR_UID;
347 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
350 dummy32 = be32_to_cpup(p++);
352 len += (XDR_QUADLEN(dummy32) << 2);
353 READMEM(buf, dummy32);
354 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
356 iattr->ia_valid |= ATTR_GID;
358 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
361 dummy32 = be32_to_cpup(p++);
363 case NFS4_SET_TO_CLIENT_TIME:
364 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
365 all 32 bits of 'nseconds'. */
368 READ64(iattr->ia_atime.tv_sec);
369 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
370 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
372 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
374 case NFS4_SET_TO_SERVER_TIME:
375 iattr->ia_valid |= ATTR_ATIME;
381 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
384 dummy32 = be32_to_cpup(p++);
386 case NFS4_SET_TO_CLIENT_TIME:
387 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
388 all 32 bits of 'nseconds'. */
391 READ64(iattr->ia_mtime.tv_sec);
392 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
393 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
395 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
397 case NFS4_SET_TO_SERVER_TIME:
398 iattr->ia_valid |= ATTR_MTIME;
406 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
407 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
410 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
413 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
416 dummy32 = be32_to_cpup(p++);
418 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
419 return nfserr_badlabel;
420 len += (XDR_QUADLEN(dummy32) << 2);
421 READMEM(buf, dummy32);
422 label->data = kzalloc(dummy32 + 1, GFP_KERNEL);
424 return nfserr_jukebox;
425 label->len = dummy32;
426 defer_free(argp, kfree, label->data);
427 memcpy(label->data, buf, dummy32);
431 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
432 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
433 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
434 READ_BUF(expected_len - len);
435 else if (len != expected_len)
442 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
446 READ_BUF(sizeof(stateid_t));
447 sid->si_generation = be32_to_cpup(p++);
448 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
454 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
459 access->ac_req_access = be32_to_cpup(p++);
464 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
472 /* callback_sec_params4 */
474 nr_secflavs = be32_to_cpup(p++);
476 cbs->flavor = (u32)(-1);
478 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
480 for (i = 0; i < nr_secflavs; ++i) {
482 dummy = be32_to_cpup(p++);
485 /* Nothing to read */
486 if (cbs->flavor == (u32)(-1))
487 cbs->flavor = RPC_AUTH_NULL;
492 dummy = be32_to_cpup(p++);
495 dummy = be32_to_cpup(p++);
497 SAVEMEM(machine_name, dummy);
501 uid = be32_to_cpup(p++);
502 gid = be32_to_cpup(p++);
506 dummy = be32_to_cpup(p++);
508 if (cbs->flavor == (u32)(-1)) {
509 kuid_t kuid = make_kuid(&init_user_ns, uid);
510 kgid_t kgid = make_kgid(&init_user_ns, gid);
511 if (uid_valid(kuid) && gid_valid(kgid)) {
514 cbs->flavor = RPC_AUTH_UNIX;
516 dprintk("RPC_AUTH_UNIX with invalid"
517 "uid or gid ignoring!\n");
522 dprintk("RPC_AUTH_GSS callback secflavor "
526 dummy = be32_to_cpup(p++);
527 /* gcbp_handle_from_server */
528 dummy = be32_to_cpup(p++);
530 p += XDR_QUADLEN(dummy);
531 /* gcbp_handle_from_client */
533 dummy = be32_to_cpup(p++);
537 dprintk("Illegal callback secflavor\n");
544 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
549 bc->bc_cb_program = be32_to_cpup(p++);
550 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
555 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
559 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
560 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
561 bcts->dir = be32_to_cpup(p++);
562 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
563 * could help us figure out we should be using it. */
568 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
573 close->cl_seqid = be32_to_cpup(p++);
574 return nfsd4_decode_stateid(argp, &close->cl_stateid);
581 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
586 READ64(commit->co_offset);
587 commit->co_count = be32_to_cpup(p++);
593 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
598 create->cr_type = be32_to_cpup(p++);
599 switch (create->cr_type) {
602 create->cr_linklen = be32_to_cpup(p++);
603 READ_BUF(create->cr_linklen);
604 SAVEMEM(create->cr_linkname, create->cr_linklen);
609 create->cr_specdata1 = be32_to_cpup(p++);
610 create->cr_specdata2 = be32_to_cpup(p++);
620 create->cr_namelen = be32_to_cpup(p++);
621 READ_BUF(create->cr_namelen);
622 SAVEMEM(create->cr_name, create->cr_namelen);
623 if ((status = check_filename(create->cr_name, create->cr_namelen)))
626 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
627 &create->cr_acl, &create->cr_label);
635 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
637 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
641 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
643 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
647 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
652 link->li_namelen = be32_to_cpup(p++);
653 READ_BUF(link->li_namelen);
654 SAVEMEM(link->li_name, link->li_namelen);
655 if ((status = check_filename(link->li_name, link->li_namelen)))
662 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
667 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
670 lock->lk_type = be32_to_cpup(p++);
671 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
673 lock->lk_reclaim = be32_to_cpup(p++);
674 READ64(lock->lk_offset);
675 READ64(lock->lk_length);
676 lock->lk_is_new = be32_to_cpup(p++);
678 if (lock->lk_is_new) {
680 lock->lk_new_open_seqid = be32_to_cpup(p++);
681 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
684 READ_BUF(8 + sizeof(clientid_t));
685 lock->lk_new_lock_seqid = be32_to_cpup(p++);
686 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
687 lock->lk_new_owner.len = be32_to_cpup(p++);
688 READ_BUF(lock->lk_new_owner.len);
689 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
691 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
695 lock->lk_old_lock_seqid = be32_to_cpup(p++);
702 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
707 lockt->lt_type = be32_to_cpup(p++);
708 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
710 READ64(lockt->lt_offset);
711 READ64(lockt->lt_length);
712 COPYMEM(&lockt->lt_clientid, 8);
713 lockt->lt_owner.len = be32_to_cpup(p++);
714 READ_BUF(lockt->lt_owner.len);
715 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
721 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
726 locku->lu_type = be32_to_cpup(p++);
727 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
729 locku->lu_seqid = be32_to_cpup(p++);
730 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
734 READ64(locku->lu_offset);
735 READ64(locku->lu_length);
741 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
746 lookup->lo_len = be32_to_cpup(p++);
747 READ_BUF(lookup->lo_len);
748 SAVEMEM(lookup->lo_name, lookup->lo_len);
749 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
755 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
761 w = be32_to_cpup(p++);
762 *share_access = w & NFS4_SHARE_ACCESS_MASK;
763 *deleg_want = w & NFS4_SHARE_WANT_MASK;
765 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
767 switch (w & NFS4_SHARE_ACCESS_MASK) {
768 case NFS4_SHARE_ACCESS_READ:
769 case NFS4_SHARE_ACCESS_WRITE:
770 case NFS4_SHARE_ACCESS_BOTH:
773 return nfserr_bad_xdr;
775 w &= ~NFS4_SHARE_ACCESS_MASK;
778 if (!argp->minorversion)
779 return nfserr_bad_xdr;
780 switch (w & NFS4_SHARE_WANT_MASK) {
781 case NFS4_SHARE_WANT_NO_PREFERENCE:
782 case NFS4_SHARE_WANT_READ_DELEG:
783 case NFS4_SHARE_WANT_WRITE_DELEG:
784 case NFS4_SHARE_WANT_ANY_DELEG:
785 case NFS4_SHARE_WANT_NO_DELEG:
786 case NFS4_SHARE_WANT_CANCEL:
789 return nfserr_bad_xdr;
791 w &= ~NFS4_SHARE_WANT_MASK;
795 if (!deleg_when) /* open_downgrade */
798 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
799 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
800 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
801 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
805 return nfserr_bad_xdr;
808 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
813 *x = be32_to_cpup(p++);
814 /* Note: unlinke access bits, deny bits may be zero. */
815 if (*x & ~NFS4_SHARE_DENY_BOTH)
816 return nfserr_bad_xdr;
819 return nfserr_bad_xdr;
822 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
827 o->len = be32_to_cpup(p++);
829 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
830 return nfserr_bad_xdr;
833 SAVEMEM(o->data, o->len);
836 return nfserr_bad_xdr;
840 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
845 memset(open->op_bmval, 0, sizeof(open->op_bmval));
846 open->op_iattr.ia_valid = 0;
847 open->op_openowner = NULL;
849 open->op_xdr_error = 0;
850 /* seqid, share_access, share_deny, clientid, ownerlen */
852 open->op_seqid = be32_to_cpup(p++);
853 /* decode, yet ignore deleg_when until supported */
854 status = nfsd4_decode_share_access(argp, &open->op_share_access,
855 &open->op_deleg_want, &dummy);
858 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
861 READ_BUF(sizeof(clientid_t));
862 COPYMEM(&open->op_clientid, sizeof(clientid_t));
863 status = nfsd4_decode_opaque(argp, &open->op_owner);
867 open->op_create = be32_to_cpup(p++);
868 switch (open->op_create) {
869 case NFS4_OPEN_NOCREATE:
871 case NFS4_OPEN_CREATE:
873 open->op_createmode = be32_to_cpup(p++);
874 switch (open->op_createmode) {
875 case NFS4_CREATE_UNCHECKED:
876 case NFS4_CREATE_GUARDED:
877 status = nfsd4_decode_fattr(argp, open->op_bmval,
878 &open->op_iattr, &open->op_acl, &open->op_label);
882 case NFS4_CREATE_EXCLUSIVE:
883 READ_BUF(NFS4_VERIFIER_SIZE);
884 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
886 case NFS4_CREATE_EXCLUSIVE4_1:
887 if (argp->minorversion < 1)
889 READ_BUF(NFS4_VERIFIER_SIZE);
890 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
891 status = nfsd4_decode_fattr(argp, open->op_bmval,
892 &open->op_iattr, &open->op_acl, &open->op_label);
906 open->op_claim_type = be32_to_cpup(p++);
907 switch (open->op_claim_type) {
908 case NFS4_OPEN_CLAIM_NULL:
909 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
911 open->op_fname.len = be32_to_cpup(p++);
912 READ_BUF(open->op_fname.len);
913 SAVEMEM(open->op_fname.data, open->op_fname.len);
914 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
917 case NFS4_OPEN_CLAIM_PREVIOUS:
919 open->op_delegate_type = be32_to_cpup(p++);
921 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
922 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
926 open->op_fname.len = be32_to_cpup(p++);
927 READ_BUF(open->op_fname.len);
928 SAVEMEM(open->op_fname.data, open->op_fname.len);
929 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
932 case NFS4_OPEN_CLAIM_FH:
933 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
934 if (argp->minorversion < 1)
938 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
939 if (argp->minorversion < 1)
941 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
953 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
957 if (argp->minorversion >= 1)
958 return nfserr_notsupp;
960 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
964 open_conf->oc_seqid = be32_to_cpup(p++);
970 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
974 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
978 open_down->od_seqid = be32_to_cpup(p++);
979 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
980 &open_down->od_deleg_want, NULL);
983 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
990 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
995 putfh->pf_fhlen = be32_to_cpup(p++);
996 if (putfh->pf_fhlen > NFS4_FHSIZE)
998 READ_BUF(putfh->pf_fhlen);
999 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1005 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1007 if (argp->minorversion == 0)
1009 return nfserr_notsupp;
1013 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1017 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1021 READ64(read->rd_offset);
1022 read->rd_length = be32_to_cpup(p++);
1028 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1033 READ64(readdir->rd_cookie);
1034 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1035 readdir->rd_dircount = be32_to_cpup(p++);
1036 readdir->rd_maxcount = be32_to_cpup(p++);
1037 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1044 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1049 remove->rm_namelen = be32_to_cpup(p++);
1050 READ_BUF(remove->rm_namelen);
1051 SAVEMEM(remove->rm_name, remove->rm_namelen);
1052 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1059 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1064 rename->rn_snamelen = be32_to_cpup(p++);
1065 READ_BUF(rename->rn_snamelen + 4);
1066 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1067 rename->rn_tnamelen = be32_to_cpup(p++);
1068 READ_BUF(rename->rn_tnamelen);
1069 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1070 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1072 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1079 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1083 if (argp->minorversion >= 1)
1084 return nfserr_notsupp;
1086 READ_BUF(sizeof(clientid_t));
1087 COPYMEM(clientid, sizeof(clientid_t));
1093 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1094 struct nfsd4_secinfo *secinfo)
1099 secinfo->si_namelen = be32_to_cpup(p++);
1100 READ_BUF(secinfo->si_namelen);
1101 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1102 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1109 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1110 struct nfsd4_secinfo_no_name *sin)
1115 sin->sin_style = be32_to_cpup(p++);
1120 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1124 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1127 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1128 &setattr->sa_acl, &setattr->sa_label);
1132 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1136 if (argp->minorversion >= 1)
1137 return nfserr_notsupp;
1139 READ_BUF(NFS4_VERIFIER_SIZE);
1140 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1142 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1144 return nfserr_bad_xdr;
1146 setclientid->se_callback_prog = be32_to_cpup(p++);
1147 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1149 READ_BUF(setclientid->se_callback_netid_len + 4);
1150 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1151 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1153 READ_BUF(setclientid->se_callback_addr_len + 4);
1154 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1155 setclientid->se_callback_ident = be32_to_cpup(p++);
1161 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1165 if (argp->minorversion >= 1)
1166 return nfserr_notsupp;
1168 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1169 COPYMEM(&scd_c->sc_clientid, 8);
1170 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1175 /* Also used for NVERIFY */
1177 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1181 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1184 /* For convenience's sake, we compare raw xdr'd attributes in
1185 * nfsd4_proc_verify */
1188 verify->ve_attrlen = be32_to_cpup(p++);
1189 READ_BUF(verify->ve_attrlen);
1190 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1196 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1202 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1206 READ64(write->wr_offset);
1207 write->wr_stable_how = be32_to_cpup(p++);
1208 if (write->wr_stable_how > 2)
1210 write->wr_buflen = be32_to_cpup(p++);
1212 /* Sorry .. no magic macros for this.. *
1213 * READ_BUF(write->wr_buflen);
1214 * SAVEMEM(write->wr_buf, write->wr_buflen);
1216 avail = (char*)argp->end - (char*)argp->p;
1217 if (avail + argp->pagelen < write->wr_buflen) {
1218 dprintk("NFSD: xdr error (%s:%d)\n",
1219 __FILE__, __LINE__);
1222 write->wr_head.iov_base = p;
1223 write->wr_head.iov_len = avail;
1224 write->wr_pagelist = argp->pagelist;
1226 len = XDR_QUADLEN(write->wr_buflen) << 2;
1232 pages = len >> PAGE_SHIFT;
1233 argp->pagelist += pages;
1234 argp->pagelen -= pages * PAGE_SIZE;
1235 len -= pages * PAGE_SIZE;
1237 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1239 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1241 argp->p += XDR_QUADLEN(len);
1247 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1251 if (argp->minorversion >= 1)
1252 return nfserr_notsupp;
1255 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1256 rlockowner->rl_owner.len = be32_to_cpup(p++);
1257 READ_BUF(rlockowner->rl_owner.len);
1258 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1260 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1261 return nfserr_inval;
1266 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1267 struct nfsd4_exchange_id *exid)
1272 READ_BUF(NFS4_VERIFIER_SIZE);
1273 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1275 status = nfsd4_decode_opaque(argp, &exid->clname);
1277 return nfserr_bad_xdr;
1280 exid->flags = be32_to_cpup(p++);
1282 /* Ignore state_protect4_a */
1284 exid->spa_how = be32_to_cpup(p++);
1285 switch (exid->spa_how) {
1289 /* spo_must_enforce */
1291 dummy = be32_to_cpup(p++);
1292 READ_BUF(dummy * 4);
1295 /* spo_must_allow */
1297 dummy = be32_to_cpup(p++);
1298 READ_BUF(dummy * 4);
1304 dummy = be32_to_cpup(p++);
1305 READ_BUF(dummy * 4);
1309 dummy = be32_to_cpup(p++);
1310 READ_BUF(dummy * 4);
1313 /* ssp_hash_algs<> */
1315 tmp = be32_to_cpup(p++);
1318 dummy = be32_to_cpup(p++);
1320 p += XDR_QUADLEN(dummy);
1323 /* ssp_encr_algs<> */
1325 tmp = be32_to_cpup(p++);
1328 dummy = be32_to_cpup(p++);
1330 p += XDR_QUADLEN(dummy);
1333 /* ssp_window and ssp_num_gss_handles */
1335 dummy = be32_to_cpup(p++);
1336 dummy = be32_to_cpup(p++);
1342 /* Ignore Implementation ID */
1343 READ_BUF(4); /* nfs_impl_id4 array length */
1344 dummy = be32_to_cpup(p++);
1352 dummy = be32_to_cpup(p++);
1354 p += XDR_QUADLEN(dummy);
1358 dummy = be32_to_cpup(p++);
1360 p += XDR_QUADLEN(dummy);
1370 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1371 struct nfsd4_create_session *sess)
1377 COPYMEM(&sess->clientid, 8);
1378 sess->seqid = be32_to_cpup(p++);
1379 sess->flags = be32_to_cpup(p++);
1381 /* Fore channel attrs */
1383 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1384 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1385 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1386 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1387 sess->fore_channel.maxops = be32_to_cpup(p++);
1388 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1389 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1390 if (sess->fore_channel.nr_rdma_attrs == 1) {
1392 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1393 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1394 dprintk("Too many fore channel attr bitmaps!\n");
1398 /* Back channel attrs */
1400 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1401 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1402 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1403 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1404 sess->back_channel.maxops = be32_to_cpup(p++);
1405 sess->back_channel.maxreqs = be32_to_cpup(p++);
1406 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1407 if (sess->back_channel.nr_rdma_attrs == 1) {
1409 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1410 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1411 dprintk("Too many back channel attr bitmaps!\n");
1416 sess->callback_prog = be32_to_cpup(p++);
1417 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1422 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1423 struct nfsd4_destroy_session *destroy_session)
1426 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1427 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1433 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1434 struct nfsd4_free_stateid *free_stateid)
1438 READ_BUF(sizeof(stateid_t));
1439 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1440 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1446 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1447 struct nfsd4_sequence *seq)
1451 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1452 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1453 seq->seqid = be32_to_cpup(p++);
1454 seq->slotid = be32_to_cpup(p++);
1455 seq->maxslots = be32_to_cpup(p++);
1456 seq->cachethis = be32_to_cpup(p++);
1462 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1466 struct nfsd4_test_stateid_id *stateid;
1469 test_stateid->ts_num_ids = ntohl(*p++);
1471 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1473 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1474 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1476 status = nfserrno(-ENOMEM);
1480 defer_free(argp, kfree, stateid);
1481 INIT_LIST_HEAD(&stateid->ts_id_list);
1482 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1484 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1493 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1494 status = nfserr_bad_xdr;
1498 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1503 COPYMEM(&dc->clientid, 8);
1508 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1513 rc->rca_one_fs = be32_to_cpup(p++);
1519 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1525 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1527 return nfserr_notsupp;
1530 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1532 static nfsd4_dec nfsd4_dec_ops[] = {
1533 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1534 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1535 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1536 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1537 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1538 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1539 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1540 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1541 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1542 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1543 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1544 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1545 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1546 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1547 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1548 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1549 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1550 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1551 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1552 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1553 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1554 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1555 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1556 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1557 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1558 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1559 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1560 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1561 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1562 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1564 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1565 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1566 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1567 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1568 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1569 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1571 /* new operations for NFSv4.1 */
1572 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1573 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1574 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1575 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1576 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1577 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1578 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1579 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1580 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1581 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1582 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1583 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1585 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1586 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1587 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1588 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1589 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1590 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1594 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1596 if (op->opnum < FIRST_NFS4_OP)
1598 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1600 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1602 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1608 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1611 struct nfsd4_op *op;
1612 bool cachethis = false;
1613 int auth_slack= argp->rqstp->rq_auth_slack;
1614 int max_reply = auth_slack + 8; /* opcnt, status */
1620 argp->taglen = be32_to_cpup(p++);
1621 READ_BUF(argp->taglen + 8);
1622 SAVEMEM(argp->tag, argp->taglen);
1623 argp->minorversion = be32_to_cpup(p++);
1624 argp->opcnt = be32_to_cpup(p++);
1625 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1627 if (argp->taglen > NFSD4_MAX_TAGLEN)
1629 if (argp->opcnt > 100)
1632 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1633 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1635 argp->ops = argp->iops;
1636 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1641 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1644 for (i = 0; i < argp->opcnt; i++) {
1649 op->opnum = be32_to_cpup(p++);
1651 if (nfsd4_opnum_in_range(argp, op))
1652 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1654 op->opnum = OP_ILLEGAL;
1655 op->status = nfserr_op_illegal;
1658 * We'll try to cache the result in the DRC if any one
1659 * op in the compound wants to be cached:
1661 cachethis |= nfsd4_cache_this_op(op);
1663 if (op->opnum == OP_READ) {
1665 readbytes += nfsd4_max_reply(argp->rqstp, op);
1667 max_reply += nfsd4_max_reply(argp->rqstp, op);
1674 /* Sessions make the DRC unnecessary: */
1675 if (argp->minorversion)
1677 svc_reserve(argp->rqstp, max_reply + readbytes);
1678 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1680 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1681 argp->rqstp->rq_splice_ok = false;
1686 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1688 if (IS_I_VERSION(inode)) {
1689 p = xdr_encode_hyper(p, inode->i_version);
1691 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1692 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1697 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1699 *p++ = cpu_to_be32(c->atomic);
1700 if (c->change_supported) {
1701 p = xdr_encode_hyper(p, c->before_change);
1702 p = xdr_encode_hyper(p, c->after_change);
1704 *p++ = cpu_to_be32(c->before_ctime_sec);
1705 *p++ = cpu_to_be32(c->before_ctime_nsec);
1706 *p++ = cpu_to_be32(c->after_ctime_sec);
1707 *p++ = cpu_to_be32(c->after_ctime_nsec);
1712 /* Encode as an array of strings the string given with components
1713 * separated @sep, escaped with esc_enter and esc_exit.
1715 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1716 char *components, char esc_enter,
1722 int strlen, count=0;
1723 char *str, *end, *next;
1725 dprintk("nfsd4_encode_components(%s)\n", components);
1727 pathlen_offset = xdr->buf->len;
1728 p = xdr_reserve_space(xdr, 4);
1730 return nfserr_resource;
1731 p++; /* We will fill this in with @count later */
1733 end = str = components;
1735 bool found_esc = false;
1737 /* try to parse as esc_start, ..., esc_end, sep */
1738 if (*str == esc_enter) {
1739 for (; *end && (*end != esc_exit); end++)
1740 /* find esc_exit or end of string */;
1742 if (*end && (!*next || *next == sep)) {
1749 for (; *end && (*end != sep); end++)
1750 /* find sep or end of string */;
1754 p = xdr_reserve_space(xdr, strlen + 4);
1756 return nfserr_resource;
1757 p = xdr_encode_opaque(p, str, strlen);
1764 pathlen = htonl(xdr->buf->len - pathlen_offset);
1765 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1769 /* Encode as an array of strings the string given with components
1772 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1775 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
1779 * encode a location element of a fs_locations structure
1781 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1782 struct nfsd4_fs_location *location)
1786 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
1790 status = nfsd4_encode_components(xdr, '/', location->path);
1797 * Encode a path in RFC3530 'pathname4' format
1799 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1800 const struct path *root,
1801 const struct path *path)
1803 struct path cur = *path;
1805 struct dentry **components = NULL;
1806 unsigned int ncomponents = 0;
1807 __be32 err = nfserr_jukebox;
1809 dprintk("nfsd4_encode_components(");
1812 /* First walk the path up to the nfsd root, and store the
1813 * dentries/path components in an array.
1816 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1818 if (cur.dentry == cur.mnt->mnt_root) {
1819 if (follow_up(&cur))
1823 if ((ncomponents & 15) == 0) {
1824 struct dentry **new;
1825 new = krealloc(components,
1826 sizeof(*new) * (ncomponents + 16),
1832 components[ncomponents++] = cur.dentry;
1833 cur.dentry = dget_parent(cur.dentry);
1835 err = nfserr_resource;
1836 p = xdr_reserve_space(xdr, 4);
1839 *p++ = cpu_to_be32(ncomponents);
1841 while (ncomponents) {
1842 struct dentry *dentry = components[ncomponents - 1];
1845 spin_lock(&dentry->d_lock);
1846 len = dentry->d_name.len;
1847 p = xdr_reserve_space(xdr, len + 4);
1849 spin_unlock(&dentry->d_lock);
1852 p = xdr_encode_opaque(p, dentry->d_name.name, len);
1853 dprintk("/%s", dentry->d_name.name);
1854 spin_unlock(&dentry->d_lock);
1863 dput(components[--ncomponents]);
1869 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1870 struct svc_rqst *rqstp, const struct path *path)
1872 struct svc_export *exp_ps;
1875 exp_ps = rqst_find_fsidzero_export(rqstp);
1877 return nfserrno(PTR_ERR(exp_ps));
1878 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
1884 * encode a fs_locations structure
1886 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1887 struct svc_rqst *rqstp, struct svc_export *exp)
1892 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1894 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
1897 p = xdr_reserve_space(xdr, 4);
1899 return nfserr_resource;
1900 *p++ = cpu_to_be32(fslocs->locations_count);
1901 for (i=0; i<fslocs->locations_count; i++) {
1902 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
1909 static u32 nfs4_file_type(umode_t mode)
1911 switch (mode & S_IFMT) {
1912 case S_IFIFO: return NF4FIFO;
1913 case S_IFCHR: return NF4CHR;
1914 case S_IFDIR: return NF4DIR;
1915 case S_IFBLK: return NF4BLK;
1916 case S_IFLNK: return NF4LNK;
1917 case S_IFREG: return NF4REG;
1918 case S_IFSOCK: return NF4SOCK;
1919 default: return NF4BAD;
1923 static inline __be32
1924 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1925 struct nfs4_ace *ace)
1927 if (ace->whotype != NFS4_ACL_WHO_NAMED)
1928 return nfs4_acl_write_who(xdr, ace->whotype);
1929 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1930 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
1932 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1935 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1936 FATTR4_WORD0_RDATTR_ERROR)
1937 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1939 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1940 static inline __be32
1941 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1942 void *context, int len)
1946 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1948 return nfserr_resource;
1951 * For now we use a 0 here to indicate the null translation; in
1952 * the future we may place a call to translation code here.
1954 *p++ = cpu_to_be32(0); /* lfs */
1955 *p++ = cpu_to_be32(0); /* pi */
1956 p = xdr_encode_opaque(p, context, len);
1960 static inline __be32
1961 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1962 void *context, int len)
1966 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1968 /* As per referral draft: */
1969 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1970 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1971 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1972 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1973 *rdattr_err = NFSERR_MOVED;
1975 return nfserr_moved;
1977 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1978 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1983 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1985 struct path path = exp->ex_path;
1989 while (follow_up(&path)) {
1990 if (path.dentry != path.mnt->mnt_root)
1993 err = vfs_getattr(&path, stat);
1999 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2003 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2004 struct svc_export *exp,
2005 struct dentry *dentry, u32 *bmval,
2006 struct svc_rqst *rqstp, int ignore_crossmnt)
2008 u32 bmval0 = bmval[0];
2009 u32 bmval1 = bmval[1];
2010 u32 bmval2 = bmval[2];
2012 struct svc_fh *tempfh = NULL;
2013 struct kstatfs statfs;
2015 int starting_len = xdr->buf->len;
2024 struct nfs4_acl *acl = NULL;
2025 void *context = NULL;
2027 bool contextsupport = false;
2028 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2029 u32 minorversion = resp->cstate.minorversion;
2030 struct path path = {
2031 .mnt = exp->ex_path.mnt,
2034 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2036 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2037 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2038 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2039 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2041 if (exp->ex_fslocs.migrated) {
2043 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2048 err = vfs_getattr(&path, &stat);
2051 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2052 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2053 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2054 FATTR4_WORD1_SPACE_TOTAL))) {
2055 err = vfs_statfs(&path, &statfs);
2059 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2060 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2061 status = nfserr_jukebox;
2064 fh_init(tempfh, NFS4_FHSIZE);
2065 status = fh_compose(tempfh, exp, dentry, NULL);
2070 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2071 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2072 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2073 aclsupport = (err == 0);
2074 if (bmval0 & FATTR4_WORD0_ACL) {
2075 if (err == -EOPNOTSUPP)
2076 bmval0 &= ~FATTR4_WORD0_ACL;
2077 else if (err == -EINVAL) {
2078 status = nfserr_attrnotsupp;
2080 } else if (err != 0)
2085 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2086 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2087 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2088 err = security_inode_getsecctx(dentry->d_inode,
2089 &context, &contextlen);
2090 contextsupport = (err == 0);
2091 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2092 if (err == -EOPNOTSUPP)
2093 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2098 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2101 p = xdr_reserve_space(xdr, 16);
2104 *p++ = cpu_to_be32(3);
2105 *p++ = cpu_to_be32(bmval0);
2106 *p++ = cpu_to_be32(bmval1);
2107 *p++ = cpu_to_be32(bmval2);
2108 } else if (bmval1) {
2109 p = xdr_reserve_space(xdr, 12);
2112 *p++ = cpu_to_be32(2);
2113 *p++ = cpu_to_be32(bmval0);
2114 *p++ = cpu_to_be32(bmval1);
2116 p = xdr_reserve_space(xdr, 8);
2119 *p++ = cpu_to_be32(1);
2120 *p++ = cpu_to_be32(bmval0);
2123 attrlen_offset = xdr->buf->len;
2124 p = xdr_reserve_space(xdr, 4);
2127 p++; /* to be backfilled later */
2129 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2130 u32 word0 = nfsd_suppattrs0(minorversion);
2131 u32 word1 = nfsd_suppattrs1(minorversion);
2132 u32 word2 = nfsd_suppattrs2(minorversion);
2135 word0 &= ~FATTR4_WORD0_ACL;
2136 if (!contextsupport)
2137 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2139 p = xdr_reserve_space(xdr, 12);
2142 *p++ = cpu_to_be32(2);
2143 *p++ = cpu_to_be32(word0);
2144 *p++ = cpu_to_be32(word1);
2146 p = xdr_reserve_space(xdr, 16);
2149 *p++ = cpu_to_be32(3);
2150 *p++ = cpu_to_be32(word0);
2151 *p++ = cpu_to_be32(word1);
2152 *p++ = cpu_to_be32(word2);
2155 if (bmval0 & FATTR4_WORD0_TYPE) {
2156 p = xdr_reserve_space(xdr, 4);
2159 dummy = nfs4_file_type(stat.mode);
2160 if (dummy == NF4BAD) {
2161 status = nfserr_serverfault;
2164 *p++ = cpu_to_be32(dummy);
2166 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2167 p = xdr_reserve_space(xdr, 4);
2170 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2171 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2173 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2174 NFS4_FH_VOL_RENAME);
2176 if (bmval0 & FATTR4_WORD0_CHANGE) {
2177 p = xdr_reserve_space(xdr, 8);
2180 p = encode_change(p, &stat, dentry->d_inode);
2182 if (bmval0 & FATTR4_WORD0_SIZE) {
2183 p = xdr_reserve_space(xdr, 8);
2186 p = xdr_encode_hyper(p, stat.size);
2188 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2189 p = xdr_reserve_space(xdr, 4);
2192 *p++ = cpu_to_be32(1);
2194 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2195 p = xdr_reserve_space(xdr, 4);
2198 *p++ = cpu_to_be32(1);
2200 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2201 p = xdr_reserve_space(xdr, 4);
2204 *p++ = cpu_to_be32(0);
2206 if (bmval0 & FATTR4_WORD0_FSID) {
2207 p = xdr_reserve_space(xdr, 16);
2210 if (exp->ex_fslocs.migrated) {
2211 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2212 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2213 } else switch(fsid_source(fhp)) {
2214 case FSIDSOURCE_FSID:
2215 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2216 p = xdr_encode_hyper(p, (u64)0);
2218 case FSIDSOURCE_DEV:
2219 *p++ = cpu_to_be32(0);
2220 *p++ = cpu_to_be32(MAJOR(stat.dev));
2221 *p++ = cpu_to_be32(0);
2222 *p++ = cpu_to_be32(MINOR(stat.dev));
2224 case FSIDSOURCE_UUID:
2225 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2230 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2231 p = xdr_reserve_space(xdr, 4);
2234 *p++ = cpu_to_be32(0);
2236 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2237 p = xdr_reserve_space(xdr, 4);
2240 *p++ = cpu_to_be32(nn->nfsd4_lease);
2242 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2243 p = xdr_reserve_space(xdr, 4);
2246 *p++ = cpu_to_be32(rdattr_err);
2248 if (bmval0 & FATTR4_WORD0_ACL) {
2249 struct nfs4_ace *ace;
2252 p = xdr_reserve_space(xdr, 4);
2256 *p++ = cpu_to_be32(0);
2259 p = xdr_reserve_space(xdr, 4);
2262 *p++ = cpu_to_be32(acl->naces);
2264 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2265 p = xdr_reserve_space(xdr, 4*3);
2268 *p++ = cpu_to_be32(ace->type);
2269 *p++ = cpu_to_be32(ace->flag);
2270 *p++ = cpu_to_be32(ace->access_mask &
2272 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2278 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2279 p = xdr_reserve_space(xdr, 4);
2282 *p++ = cpu_to_be32(aclsupport ?
2283 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2285 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2286 p = xdr_reserve_space(xdr, 4);
2289 *p++ = cpu_to_be32(1);
2291 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2292 p = xdr_reserve_space(xdr, 4);
2295 *p++ = cpu_to_be32(0);
2297 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2298 p = xdr_reserve_space(xdr, 4);
2301 *p++ = cpu_to_be32(1);
2303 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2304 p = xdr_reserve_space(xdr, 4);
2307 *p++ = cpu_to_be32(1);
2309 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2310 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2313 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2314 fhp->fh_handle.fh_size);
2316 if (bmval0 & FATTR4_WORD0_FILEID) {
2317 p = xdr_reserve_space(xdr, 8);
2320 p = xdr_encode_hyper(p, stat.ino);
2322 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2323 p = xdr_reserve_space(xdr, 8);
2326 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2328 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2329 p = xdr_reserve_space(xdr, 8);
2332 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2334 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2335 p = xdr_reserve_space(xdr, 8);
2338 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2340 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2341 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2345 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2346 p = xdr_reserve_space(xdr, 4);
2349 *p++ = cpu_to_be32(1);
2351 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2352 p = xdr_reserve_space(xdr, 8);
2355 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2357 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2358 p = xdr_reserve_space(xdr, 4);
2361 *p++ = cpu_to_be32(255);
2363 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2364 p = xdr_reserve_space(xdr, 4);
2367 *p++ = cpu_to_be32(statfs.f_namelen);
2369 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2370 p = xdr_reserve_space(xdr, 8);
2373 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2375 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2376 p = xdr_reserve_space(xdr, 8);
2379 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2381 if (bmval1 & FATTR4_WORD1_MODE) {
2382 p = xdr_reserve_space(xdr, 4);
2385 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2387 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2388 p = xdr_reserve_space(xdr, 4);
2391 *p++ = cpu_to_be32(1);
2393 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2394 p = xdr_reserve_space(xdr, 4);
2397 *p++ = cpu_to_be32(stat.nlink);
2399 if (bmval1 & FATTR4_WORD1_OWNER) {
2400 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2404 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2405 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2409 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2410 p = xdr_reserve_space(xdr, 8);
2413 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2414 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2416 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2417 p = xdr_reserve_space(xdr, 8);
2420 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2421 p = xdr_encode_hyper(p, dummy64);
2423 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2424 p = xdr_reserve_space(xdr, 8);
2427 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2428 p = xdr_encode_hyper(p, dummy64);
2430 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2431 p = xdr_reserve_space(xdr, 8);
2434 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2435 p = xdr_encode_hyper(p, dummy64);
2437 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2438 p = xdr_reserve_space(xdr, 8);
2441 dummy64 = (u64)stat.blocks << 9;
2442 p = xdr_encode_hyper(p, dummy64);
2444 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2445 p = xdr_reserve_space(xdr, 12);
2448 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2449 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2451 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2452 p = xdr_reserve_space(xdr, 12);
2455 *p++ = cpu_to_be32(0);
2456 *p++ = cpu_to_be32(1);
2457 *p++ = cpu_to_be32(0);
2459 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2460 p = xdr_reserve_space(xdr, 12);
2463 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2464 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2466 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2467 p = xdr_reserve_space(xdr, 12);
2470 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2471 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2473 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2474 p = xdr_reserve_space(xdr, 8);
2478 * Get parent's attributes if not ignoring crossmount
2479 * and this is the root of a cross-mounted filesystem.
2481 if (ignore_crossmnt == 0 &&
2482 dentry == exp->ex_path.mnt->mnt_root)
2483 get_parent_attributes(exp, &stat);
2484 p = xdr_encode_hyper(p, stat.ino);
2486 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2487 status = nfsd4_encode_security_label(xdr, rqstp, context,
2492 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2493 p = xdr_reserve_space(xdr, 16);
2496 *p++ = cpu_to_be32(3);
2497 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2498 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2499 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2502 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2503 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2507 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2509 security_release_secctx(context, contextlen);
2510 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2517 xdr_truncate_encode(xdr, starting_len);
2520 status = nfserrno(err);
2523 status = nfserr_resource;
2527 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2528 struct xdr_buf *buf, __be32 *p, int bytes)
2530 xdr->scratch.iov_len = 0;
2531 memset(buf, 0, sizeof(struct xdr_buf));
2532 buf->head[0].iov_base = p;
2533 buf->head[0].iov_len = 0;
2536 xdr->iov = buf->head;
2538 xdr->end = (void *)p + bytes;
2539 buf->buflen = bytes;
2542 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2543 struct svc_fh *fhp, struct svc_export *exp,
2544 struct dentry *dentry, u32 *bmval,
2545 struct svc_rqst *rqstp, int ignore_crossmnt)
2547 struct xdr_buf dummy;
2548 struct xdr_stream xdr;
2551 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2552 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2558 static inline int attributes_need_mount(u32 *bmval)
2560 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2562 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2568 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2569 const char *name, int namlen)
2571 struct svc_export *exp = cd->rd_fhp->fh_export;
2572 struct dentry *dentry;
2574 int ignore_crossmnt = 0;
2576 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2578 return nfserrno(PTR_ERR(dentry));
2579 if (!dentry->d_inode) {
2581 * nfsd_buffered_readdir drops the i_mutex between
2582 * readdir and calling this callback, leaving a window
2583 * where this directory entry could have gone away.
2586 return nfserr_noent;
2591 * In the case of a mountpoint, the client may be asking for
2592 * attributes that are only properties of the underlying filesystem
2593 * as opposed to the cross-mounted file system. In such a case,
2594 * we will not follow the cross mount and will fill the attribtutes
2595 * directly from the mountpoint dentry.
2597 if (nfsd_mountpoint(dentry, exp)) {
2600 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2601 && !attributes_need_mount(cd->rd_bmval)) {
2602 ignore_crossmnt = 1;
2606 * Why the heck aren't we just using nfsd_lookup??
2607 * Different "."/".." handling? Something else?
2608 * At least, add a comment here to explain....
2610 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2612 nfserr = nfserrno(err);
2615 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2621 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2622 cd->rd_rqstp, ignore_crossmnt);
2630 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2634 p = xdr_reserve_space(xdr, 6);
2638 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2639 *p++ = htonl(0); /* bmval1 */
2641 *p++ = htonl(4); /* attribute length */
2642 *p++ = nfserr; /* no htonl */
2647 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2648 loff_t offset, u64 ino, unsigned int d_type)
2650 struct readdir_cd *ccd = ccdv;
2651 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2652 struct xdr_stream *xdr = cd->xdr;
2653 int start_offset = xdr->buf->len;
2656 __be32 nfserr = nfserr_toosmall;
2660 /* In nfsv4, "." and ".." never make it onto the wire.. */
2661 if (name && isdotent(name, namlen)) {
2662 cd->common.err = nfs_ok;
2666 if (cd->cookie_offset) {
2667 wire_offset = cpu_to_be64(offset);
2668 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2672 p = xdr_reserve_space(xdr, 4);
2675 *p++ = xdr_one; /* mark entry present */
2676 cookie_offset = xdr->buf->len;
2677 p = xdr_reserve_space(xdr, 3*4 + namlen);
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(xdr, cd, name, namlen);
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(xdr, nfserr);
2704 nfserr = nfserr_toosmall;
2708 nfserr = nfserr_toosmall;
2709 entry_bytes = xdr->buf->len - start_offset;
2710 if (entry_bytes > cd->rd_maxcount)
2712 cd->rd_maxcount -= entry_bytes;
2713 if (!cd->rd_dircount)
2716 cd->cookie_offset = cookie_offset;
2718 cd->common.err = nfs_ok;
2721 xdr_truncate_encode(xdr, start_offset);
2722 cd->common.err = nfserr;
2727 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
2731 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2733 return nfserr_resource;
2734 *p++ = cpu_to_be32(sid->si_generation);
2735 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2736 sizeof(stateid_opaque_t));
2741 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2743 struct xdr_stream *xdr = &resp->xdr;
2747 p = xdr_reserve_space(xdr, 8);
2749 return nfserr_resource;
2750 *p++ = cpu_to_be32(access->ac_supported);
2751 *p++ = cpu_to_be32(access->ac_resp_access);
2756 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2758 struct xdr_stream *xdr = &resp->xdr;
2762 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2764 return nfserr_resource;
2765 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2766 NFS4_MAX_SESSIONID_LEN);
2767 *p++ = cpu_to_be32(bcts->dir);
2768 /* Sorry, we do not yet support RDMA over 4.1: */
2769 *p++ = cpu_to_be32(0);
2775 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2777 struct xdr_stream *xdr = &resp->xdr;
2780 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
2787 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2789 struct xdr_stream *xdr = &resp->xdr;
2793 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2795 return nfserr_resource;
2796 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2797 NFS4_VERIFIER_SIZE);
2803 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2805 struct xdr_stream *xdr = &resp->xdr;
2809 p = xdr_reserve_space(xdr, 32);
2811 return nfserr_resource;
2812 p = encode_cinfo(p, &create->cr_cinfo);
2813 *p++ = cpu_to_be32(2);
2814 *p++ = cpu_to_be32(create->cr_bmval[0]);
2815 *p++ = cpu_to_be32(create->cr_bmval[1]);
2821 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2823 struct svc_fh *fhp = getattr->ga_fhp;
2824 struct xdr_stream *xdr = &resp->xdr;
2829 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2836 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2838 struct xdr_stream *xdr = &resp->xdr;
2839 struct svc_fh *fhp = *fhpp;
2844 len = fhp->fh_handle.fh_size;
2845 p = xdr_reserve_space(xdr, len + 4);
2847 return nfserr_resource;
2848 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
2854 * Including all fields other than the name, a LOCK4denied structure requires
2855 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2858 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
2860 struct xdr_netobj *conf = &ld->ld_owner;
2864 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
2867 * Don't fail to return the result just because we can't
2868 * return the conflicting open:
2875 return nfserr_resource;
2877 p = xdr_encode_hyper(p, ld->ld_start);
2878 p = xdr_encode_hyper(p, ld->ld_length);
2879 *p++ = cpu_to_be32(ld->ld_type);
2881 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2882 p = xdr_encode_opaque(p, conf->data, conf->len);
2883 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2884 p = xdr_encode_hyper(p, (u64)0); /* clientid */
2885 *p++ = cpu_to_be32(0); /* length of owner name */
2887 return nfserr_denied;
2891 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2893 struct xdr_stream *xdr = &resp->xdr;
2896 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
2897 else if (nfserr == nfserr_denied)
2898 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
2899 kfree(lock->lk_denied.ld_owner.data);
2904 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2906 struct xdr_stream *xdr = &resp->xdr;
2908 if (nfserr == nfserr_denied)
2909 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
2914 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2916 struct xdr_stream *xdr = &resp->xdr;
2919 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
2926 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2928 struct xdr_stream *xdr = &resp->xdr;
2932 p = xdr_reserve_space(xdr, 20);
2934 return nfserr_resource;
2935 p = encode_cinfo(p, &link->li_cinfo);
2942 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2944 struct xdr_stream *xdr = &resp->xdr;
2950 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2953 p = xdr_reserve_space(xdr, 40);
2955 return nfserr_resource;
2956 p = encode_cinfo(p, &open->op_cinfo);
2957 *p++ = cpu_to_be32(open->op_rflags);
2958 *p++ = cpu_to_be32(2);
2959 *p++ = cpu_to_be32(open->op_bmval[0]);
2960 *p++ = cpu_to_be32(open->op_bmval[1]);
2961 *p++ = cpu_to_be32(open->op_delegate_type);
2963 switch (open->op_delegate_type) {
2964 case NFS4_OPEN_DELEGATE_NONE:
2966 case NFS4_OPEN_DELEGATE_READ:
2967 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2970 p = xdr_reserve_space(xdr, 20);
2972 return nfserr_resource;
2973 *p++ = cpu_to_be32(open->op_recall);
2976 * TODO: ACE's in delegations
2978 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2979 *p++ = cpu_to_be32(0);
2980 *p++ = cpu_to_be32(0);
2981 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
2983 case NFS4_OPEN_DELEGATE_WRITE:
2984 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2987 p = xdr_reserve_space(xdr, 32);
2989 return nfserr_resource;
2990 *p++ = cpu_to_be32(0);
2993 * TODO: space_limit's in delegations
2995 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
2996 *p++ = cpu_to_be32(~(u32)0);
2997 *p++ = cpu_to_be32(~(u32)0);
3000 * TODO: ACE's in delegations
3002 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3003 *p++ = cpu_to_be32(0);
3004 *p++ = cpu_to_be32(0);
3005 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3007 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3008 switch (open->op_why_no_deleg) {
3009 case WND4_CONTENTION:
3011 p = xdr_reserve_space(xdr, 8);
3013 return nfserr_resource;
3014 *p++ = cpu_to_be32(open->op_why_no_deleg);
3015 /* deleg signaling not supported yet: */
3016 *p++ = cpu_to_be32(0);
3019 p = xdr_reserve_space(xdr, 4);
3021 return nfserr_resource;
3022 *p++ = cpu_to_be32(open->op_why_no_deleg);
3028 /* XXX save filehandle here */
3034 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3036 struct xdr_stream *xdr = &resp->xdr;
3039 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3045 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3047 struct xdr_stream *xdr = &resp->xdr;
3050 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3055 static __be32 nfsd4_encode_splice_read(
3056 struct nfsd4_compoundres *resp,
3057 struct nfsd4_read *read,
3058 struct file *file, unsigned long maxcount)
3060 struct xdr_stream *xdr = &resp->xdr;
3061 struct xdr_buf *buf = xdr->buf;
3065 __be32 *p = xdr->p - 2;
3068 * Don't inline pages unless we know there's room for eof,
3069 * count, and possible padding:
3071 if (xdr->end - xdr->p < 3)
3072 return nfserr_resource;
3074 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3075 read->rd_offset, &maxcount);
3078 * nfsd_splice_actor may have already messed with the
3079 * page length; reset it so as not to confuse
3080 * xdr_truncate_encode:
3086 eof = (read->rd_offset + maxcount >=
3087 read->rd_fhp->fh_dentry->d_inode->i_size);
3089 *(p++) = htonl(eof);
3090 *(p++) = htonl(maxcount);
3092 buf->page_len = maxcount;
3093 buf->len += maxcount;
3094 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
3096 /* Use rest of head for padding and remaining ops: */
3097 buf->tail[0].iov_base = xdr->p;
3098 buf->tail[0].iov_len = 0;
3099 xdr->iov = buf->tail;
3101 int pad = 4 - (maxcount&3);
3105 buf->tail[0].iov_base += maxcount&3;
3106 buf->tail[0].iov_len = pad;
3110 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3111 buf->buflen - buf->len);
3112 buf->buflen = buf->len + space_left;
3113 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3118 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3119 struct nfsd4_read *read,
3120 struct file *file, unsigned long maxcount)
3122 struct xdr_stream *xdr = &resp->xdr;
3125 int starting_len = xdr->buf->len - 8;
3137 thislen = (void *)xdr->end - (void *)xdr->p;
3140 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3142 resp->rqstp->rq_vec[v].iov_base = p;
3143 resp->rqstp->rq_vec[v].iov_len = thislen;
3148 thislen = min_t(long, len, PAGE_SIZE);
3149 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3151 resp->rqstp->rq_vec[v].iov_base = p;
3152 resp->rqstp->rq_vec[v].iov_len = thislen;
3158 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3159 read->rd_vlen, &maxcount);
3162 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3164 eof = (read->rd_offset + maxcount >=
3165 read->rd_fhp->fh_dentry->d_inode->i_size);
3168 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3169 tmp = htonl(maxcount);
3170 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3172 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3173 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3180 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3181 struct nfsd4_read *read)
3183 unsigned long maxcount;
3184 struct xdr_stream *xdr = &resp->xdr;
3185 struct file *file = read->rd_filp;
3186 int starting_len = xdr->buf->len;
3194 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3196 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3197 return nfserr_resource;
3199 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3201 return nfserr_resource;
3203 xdr_commit_encode(xdr);
3205 maxcount = svc_max_payload(resp->rqstp);
3206 if (maxcount > xdr->buf->buflen - xdr->buf->len)
3207 maxcount = xdr->buf->buflen - xdr->buf->len;
3208 if (maxcount > read->rd_length)
3209 maxcount = read->rd_length;
3211 if (!read->rd_filp) {
3212 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3218 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3219 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3221 err = nfsd4_encode_readv(resp, read, file, maxcount);
3224 nfsd_put_tmp_read_open(file, ra);
3228 xdr_truncate_encode(xdr, starting_len);
3233 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3238 struct xdr_stream *xdr = &resp->xdr;
3239 int length_offset = xdr->buf->len;
3245 p = xdr_reserve_space(xdr, 4);
3247 return nfserr_resource;
3248 maxcount = PAGE_SIZE;
3250 p = xdr_reserve_space(xdr, maxcount);
3252 return nfserr_resource;
3254 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3255 * if they would overflow the buffer. Is this kosher in NFSv4? If
3256 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3257 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3259 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3260 (char *)p, &maxcount);
3261 if (nfserr == nfserr_isdir)
3262 nfserr = nfserr_inval;
3264 xdr_truncate_encode(xdr, length_offset);
3268 wire_count = htonl(maxcount);
3269 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3270 xdr_truncate_encode(xdr, length_offset + 4 + maxcount);
3272 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3273 &zero, 4 - (maxcount&3));
3278 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3284 struct xdr_stream *xdr = &resp->xdr;
3285 int starting_len = xdr->buf->len;
3291 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3293 return nfserr_resource;
3295 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3296 *p++ = cpu_to_be32(0);
3297 *p++ = cpu_to_be32(0);
3298 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3299 - (char *)resp->xdr.buf->head[0].iov_base;
3302 * Number of bytes left for directory entries allowing for the
3303 * final 8 bytes of the readdir and a following failed op:
3305 bytes_left = xdr->buf->buflen - xdr->buf->len
3306 - COMPOUND_ERR_SLACK_SPACE - 8;
3307 if (bytes_left < 0) {
3308 nfserr = nfserr_resource;
3311 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3313 * Note the rfc defines rd_maxcount as the size of the
3314 * READDIR4resok structure, which includes the verifier above
3315 * and the 8 bytes encoded at the end of this function:
3317 if (maxcount < 16) {
3318 nfserr = nfserr_toosmall;
3321 maxcount = min_t(int, maxcount-16, bytes_left);
3324 readdir->rd_maxcount = maxcount;
3325 readdir->common.err = 0;
3326 readdir->cookie_offset = 0;
3328 offset = readdir->rd_cookie;
3329 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3331 &readdir->common, nfsd4_encode_dirent);
3332 if (nfserr == nfs_ok &&
3333 readdir->common.err == nfserr_toosmall &&
3334 xdr->buf->len == starting_len + 8) {
3335 /* nothing encoded; which limit did we hit?: */
3336 if (maxcount - 16 < bytes_left)
3337 /* It was the fault of rd_maxcount: */
3338 nfserr = nfserr_toosmall;
3340 /* We ran out of buffer space: */
3341 nfserr = nfserr_resource;
3346 if (readdir->cookie_offset) {
3347 wire_offset = cpu_to_be64(offset);
3348 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3352 p = xdr_reserve_space(xdr, 8);
3357 *p++ = 0; /* no more entries */
3358 *p++ = htonl(readdir->common.err == nfserr_eof);
3362 xdr_truncate_encode(xdr, starting_len);
3367 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3369 struct xdr_stream *xdr = &resp->xdr;
3373 p = xdr_reserve_space(xdr, 20);
3375 return nfserr_resource;
3376 p = encode_cinfo(p, &remove->rm_cinfo);
3382 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3384 struct xdr_stream *xdr = &resp->xdr;
3388 p = xdr_reserve_space(xdr, 40);
3390 return nfserr_resource;
3391 p = encode_cinfo(p, &rename->rn_sinfo);
3392 p = encode_cinfo(p, &rename->rn_tinfo);
3398 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3399 __be32 nfserr, struct svc_export *exp)
3401 u32 i, nflavs, supported;
3402 struct exp_flavor_info *flavs;
3403 struct exp_flavor_info def_flavs[2];
3404 __be32 *p, *flavorsp;
3405 static bool report = true;
3409 nfserr = nfserr_resource;
3410 if (exp->ex_nflavors) {
3411 flavs = exp->ex_flavors;
3412 nflavs = exp->ex_nflavors;
3413 } else { /* Handling of some defaults in absence of real secinfo: */
3415 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3417 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3418 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3419 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3421 flavs[0].pseudoflavor
3422 = svcauth_gss_flavor(exp->ex_client);
3425 flavs[0].pseudoflavor
3426 = exp->ex_client->flavour->flavour;
3431 p = xdr_reserve_space(xdr, 4);
3434 flavorsp = p++; /* to be backfilled later */
3436 for (i = 0; i < nflavs; i++) {
3437 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3438 struct rpcsec_gss_info info;
3440 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3442 p = xdr_reserve_space(xdr, 4 + 4 +
3443 XDR_LEN(info.oid.len) + 4 + 4);
3446 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3447 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3448 *p++ = cpu_to_be32(info.qop);
3449 *p++ = cpu_to_be32(info.service);
3450 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3452 p = xdr_reserve_space(xdr, 4);
3455 *p++ = cpu_to_be32(pf);
3458 pr_warn("NFS: SECINFO: security flavor %u "
3459 "is not supported\n", pf);
3463 if (nflavs != supported)
3465 *flavorsp = htonl(supported);
3474 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3475 struct nfsd4_secinfo *secinfo)
3477 struct xdr_stream *xdr = &resp->xdr;
3479 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3483 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3484 struct nfsd4_secinfo_no_name *secinfo)
3486 struct xdr_stream *xdr = &resp->xdr;
3488 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3492 * The SETATTR encode routine is special -- it always encodes a bitmap,
3493 * regardless of the error status.
3496 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3498 struct xdr_stream *xdr = &resp->xdr;
3501 p = xdr_reserve_space(xdr, 16);
3503 return nfserr_resource;
3505 *p++ = cpu_to_be32(3);
3506 *p++ = cpu_to_be32(0);
3507 *p++ = cpu_to_be32(0);
3508 *p++ = cpu_to_be32(0);
3511 *p++ = cpu_to_be32(3);
3512 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3513 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3514 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3520 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3522 struct xdr_stream *xdr = &resp->xdr;
3526 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3528 return nfserr_resource;
3529 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3530 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3531 NFS4_VERIFIER_SIZE);
3533 else if (nfserr == nfserr_clid_inuse) {
3534 p = xdr_reserve_space(xdr, 8);
3536 return nfserr_resource;
3537 *p++ = cpu_to_be32(0);
3538 *p++ = cpu_to_be32(0);
3544 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3546 struct xdr_stream *xdr = &resp->xdr;
3550 p = xdr_reserve_space(xdr, 16);
3552 return nfserr_resource;
3553 *p++ = cpu_to_be32(write->wr_bytes_written);
3554 *p++ = cpu_to_be32(write->wr_how_written);
3555 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3556 NFS4_VERIFIER_SIZE);
3561 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3562 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3563 1 << (OP_EXCHANGE_ID - 32) |
3564 1 << (OP_CREATE_SESSION - 32) |
3565 1 << (OP_DESTROY_SESSION - 32) |
3566 1 << (OP_DESTROY_CLIENTID - 32)
3570 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3571 struct nfsd4_exchange_id *exid)
3573 struct xdr_stream *xdr = &resp->xdr;
3578 int server_scope_sz;
3579 uint64_t minor_id = 0;
3584 major_id = utsname()->nodename;
3585 major_id_sz = strlen(major_id);
3586 server_scope = utsname()->nodename;
3587 server_scope_sz = strlen(server_scope);
3589 p = xdr_reserve_space(xdr,
3590 8 /* eir_clientid */ +
3591 4 /* eir_sequenceid */ +
3595 return nfserr_resource;
3597 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3598 *p++ = cpu_to_be32(exid->seqid);
3599 *p++ = cpu_to_be32(exid->flags);
3601 *p++ = cpu_to_be32(exid->spa_how);
3603 switch (exid->spa_how) {
3607 /* spo_must_enforce, spo_must_allow */
3608 p = xdr_reserve_space(xdr, 16);
3610 return nfserr_resource;
3612 /* spo_must_enforce bitmap: */
3613 *p++ = cpu_to_be32(2);
3614 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3615 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3616 /* empty spo_must_allow bitmap: */
3617 *p++ = cpu_to_be32(0);
3624 p = xdr_reserve_space(xdr,
3625 8 /* so_minor_id */ +
3626 4 /* so_major_id.len */ +
3627 (XDR_QUADLEN(major_id_sz) * 4) +
3628 4 /* eir_server_scope.len */ +
3629 (XDR_QUADLEN(server_scope_sz) * 4) +
3630 4 /* eir_server_impl_id.count (0) */);
3632 return nfserr_resource;
3634 /* The server_owner struct */
3635 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3637 p = xdr_encode_opaque(p, major_id, major_id_sz);
3640 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3642 /* Implementation id */
3643 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3648 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3649 struct nfsd4_create_session *sess)
3651 struct xdr_stream *xdr = &resp->xdr;
3657 p = xdr_reserve_space(xdr, 24);
3659 return nfserr_resource;
3660 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3661 NFS4_MAX_SESSIONID_LEN);
3662 *p++ = cpu_to_be32(sess->seqid);
3663 *p++ = cpu_to_be32(sess->flags);
3665 p = xdr_reserve_space(xdr, 28);
3667 return nfserr_resource;
3668 *p++ = cpu_to_be32(0); /* headerpadsz */
3669 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3670 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3671 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3672 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3673 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3674 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3676 if (sess->fore_channel.nr_rdma_attrs) {
3677 p = xdr_reserve_space(xdr, 4);
3679 return nfserr_resource;
3680 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3683 p = xdr_reserve_space(xdr, 28);
3685 return nfserr_resource;
3686 *p++ = cpu_to_be32(0); /* headerpadsz */
3687 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3688 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3689 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3690 *p++ = cpu_to_be32(sess->back_channel.maxops);
3691 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3692 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3694 if (sess->back_channel.nr_rdma_attrs) {
3695 p = xdr_reserve_space(xdr, 4);
3697 return nfserr_resource;
3698 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
3704 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3705 struct nfsd4_sequence *seq)
3707 struct xdr_stream *xdr = &resp->xdr;
3713 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3715 return nfserr_resource;
3716 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3717 NFS4_MAX_SESSIONID_LEN);
3718 *p++ = cpu_to_be32(seq->seqid);
3719 *p++ = cpu_to_be32(seq->slotid);
3720 /* Note slotid's are numbered from zero: */
3721 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3722 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3723 *p++ = cpu_to_be32(seq->status_flags);
3725 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
3730 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3731 struct nfsd4_test_stateid *test_stateid)
3733 struct xdr_stream *xdr = &resp->xdr;
3734 struct nfsd4_test_stateid_id *stateid, *next;
3740 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3742 return nfserr_resource;
3743 *p++ = htonl(test_stateid->ts_num_ids);
3745 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3746 *p++ = stateid->ts_id_status;
3753 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3758 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3761 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3762 * since we don't need to filter out obsolete ops as this is
3763 * done in the decoding phase.
3765 static nfsd4_enc nfsd4_enc_ops[] = {
3766 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3767 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3768 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3769 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3770 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3771 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3772 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3773 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3774 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3775 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3776 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3777 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3778 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3779 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3780 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3781 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3782 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3783 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3784 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3785 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3786 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3787 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3788 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3789 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3790 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3791 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3792 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3793 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3794 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3795 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3796 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3797 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3798 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3799 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3800 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3801 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3802 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3804 /* NFSv4.1 operations */
3805 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3806 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3807 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3808 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3809 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3810 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3811 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3812 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3813 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3814 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3815 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3816 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3817 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3818 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3819 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3820 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3821 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3822 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3823 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3827 * Calculate whether we still have space to encode repsize bytes.
3828 * There are two considerations:
3829 * - For NFS versions >=4.1, the size of the reply must stay within
3831 * - For all NFS versions, we must stay within limited preallocated
3834 * This is called before the operation is processed, so can only provide
3835 * an upper estimate. For some nonidempotent operations (such as
3836 * getattr), it's not necessarily a problem if that estimate is wrong,
3837 * as we can fail it after processing without significant side effects.
3839 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
3841 struct xdr_buf *buf = &resp->rqstp->rq_res;
3842 struct nfsd4_slot *slot = resp->cstate.slot;
3844 if (buf->len + respsize <= buf->buflen)
3846 if (!nfsd4_has_session(&resp->cstate))
3847 return nfserr_resource;
3848 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3850 return nfserr_rep_too_big_to_cache;
3852 return nfserr_rep_too_big;
3856 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3858 struct xdr_stream *xdr = &resp->xdr;
3859 struct nfs4_stateowner *so = resp->cstate.replay_owner;
3860 struct svc_rqst *rqstp = resp->rqstp;
3861 int post_err_offset;
3865 p = xdr_reserve_space(xdr, 8);
3870 *p++ = cpu_to_be32(op->opnum);
3871 post_err_offset = xdr->buf->len;
3873 if (op->opnum == OP_ILLEGAL)
3875 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3876 !nfsd4_enc_ops[op->opnum]);
3877 encoder = nfsd4_enc_ops[op->opnum];
3878 op->status = encoder(resp, op->status, &op->u);
3879 xdr_commit_encode(xdr);
3881 /* nfsd4_check_resp_size guarantees enough room for error status */
3883 int space_needed = 0;
3884 if (!nfsd4_last_compound_op(rqstp))
3885 space_needed = COMPOUND_ERR_SLACK_SPACE;
3886 op->status = nfsd4_check_resp_size(resp, space_needed);
3888 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3889 struct nfsd4_slot *slot = resp->cstate.slot;
3891 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3892 op->status = nfserr_rep_too_big_to_cache;
3894 op->status = nfserr_rep_too_big;
3896 if (op->status == nfserr_resource ||
3897 op->status == nfserr_rep_too_big ||
3898 op->status == nfserr_rep_too_big_to_cache) {
3900 * The operation may have already been encoded or
3901 * partially encoded. No op returns anything additional
3902 * in the case of one of these three errors, so we can
3903 * just truncate back to after the status. But it's a
3904 * bug if we had to do this on a non-idempotent op:
3906 warn_on_nonidempotent_op(op);
3907 xdr_truncate_encode(xdr, post_err_offset);
3910 int len = xdr->buf->len - post_err_offset;
3912 so->so_replay.rp_status = op->status;
3913 so->so_replay.rp_buflen = len;
3914 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3915 so->so_replay.rp_buf, len);
3918 /* Note that op->status is already in network byte order: */
3919 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
3923 * Encode the reply stored in the stateowner reply cache
3925 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3926 * previously sent already encoded operation.
3928 * called with nfs4_lock_state() held
3931 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
3934 struct nfs4_replay *rp = op->replay;
3938 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3943 *p++ = cpu_to_be32(op->opnum);
3944 *p++ = rp->rp_status; /* already xdr'ed */
3946 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
3950 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3952 return xdr_ressize_check(rqstp, p);
3955 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3957 struct svc_rqst *rqstp = rq;
3958 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3960 if (args->ops != args->iops) {
3962 args->ops = args->iops;
3966 while (args->to_free) {
3967 struct tmpbuf *tb = args->to_free;
3968 args->to_free = tb->next;
3969 tb->release(tb->buf);
3976 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3978 if (rqstp->rq_arg.head[0].iov_len % 4) {
3979 /* client is nuts */
3980 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3981 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3985 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3986 args->pagelist = rqstp->rq_arg.pages;
3987 args->pagelen = rqstp->rq_arg.page_len;
3989 args->to_free = NULL;
3990 args->ops = args->iops;
3991 args->rqstp = rqstp;
3993 return !nfsd4_decode_compound(args);
3997 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4000 * All that remains is to write the tag and operation count...
4002 struct nfsd4_compound_state *cs = &resp->cstate;
4003 struct xdr_buf *buf = resp->xdr.buf;
4005 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4006 buf->tail[0].iov_len);
4008 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4011 *p++ = htonl(resp->taglen);
4012 memcpy(p, resp->tag, resp->taglen);
4013 p += XDR_QUADLEN(resp->taglen);
4014 *p++ = htonl(resp->opcnt);
4016 if (nfsd4_has_session(cs)) {
4017 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4018 struct nfs4_client *clp = cs->session->se_client;
4019 if (cs->status != nfserr_replay_cache) {
4020 nfsd4_store_cache_entry(resp);
4021 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
4023 /* Renew the clientid on success and on replay */
4024 spin_lock(&nn->client_lock);
4025 nfsd4_put_session(cs->session);
4026 spin_unlock(&nn->client_lock);
4027 put_client_renew(clp);