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.
36 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/statfs.h>
40 #include <linux/utsname.h>
41 #include <linux/pagemap.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/addr.h>
44 #include <linux/xattr.h>
45 #include <uapi/linux/xattr.h>
55 #include "filecache.h"
59 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
60 #include <linux/security.h>
64 #define NFSDDBG_FACILITY NFSDDBG_XDR
66 const u32 nfsd_suppattrs[3][3] = {
67 {NFSD4_SUPPORTED_ATTRS_WORD0,
68 NFSD4_SUPPORTED_ATTRS_WORD1,
69 NFSD4_SUPPORTED_ATTRS_WORD2},
71 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
72 NFSD4_1_SUPPORTED_ATTRS_WORD1,
73 NFSD4_1_SUPPORTED_ATTRS_WORD2},
75 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
76 NFSD4_1_SUPPORTED_ATTRS_WORD1,
77 NFSD4_2_SUPPORTED_ATTRS_WORD2},
81 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
82 * directory in order to indicate to the client that a filesystem boundary is present
83 * We use a fixed fsid for a referral
85 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
86 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
89 check_filename(char *str, int len)
95 if (len > NFS4_MAXNAMLEN)
96 return nfserr_nametoolong;
97 if (isdotent(str, len))
98 return nfserr_badname;
99 for (i = 0; i < len; i++)
101 return nfserr_badname;
105 static int zero_clientid(clientid_t *clid)
107 return (clid->cl_boot == 0) && (clid->cl_id == 0);
111 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
112 * @argp: NFSv4 compound argument structure
113 * @len: length of buffer to allocate
115 * Allocates a buffer of size @len to be freed when processing the compound
116 * operation described in @argp finishes.
119 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
121 struct svcxdr_tmpbuf *tb;
123 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
126 tb->next = argp->to_free;
132 * For xdr strings that need to be passed to other kernel api's
133 * as null-terminated strings.
135 * Note null-terminating in place usually isn't safe since the
136 * buffer might end on a page boundary.
139 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
141 char *p = svcxdr_tmpalloc(argp, len + 1);
151 svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len)
156 * The location of the decoded data item is stable,
157 * so @p is OK to use. This is the common case.
159 if (p != argp->xdr->scratch.iov_base)
162 tmp = svcxdr_tmpalloc(argp, len);
170 * NFSv4 basic data type decoders
174 * This helper handles variable-length opaques which belong to protocol
175 * elements that this implementation does not support.
178 nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
182 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
183 return nfserr_bad_xdr;
184 if (maxlen && len > maxlen)
185 return nfserr_bad_xdr;
186 if (!xdr_inline_decode(argp->xdr, len))
187 return nfserr_bad_xdr;
193 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
198 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
199 return nfserr_bad_xdr;
200 if (len == 0 || len > NFS4_OPAQUE_LIMIT)
201 return nfserr_bad_xdr;
202 p = xdr_inline_decode(argp->xdr, len);
204 return nfserr_bad_xdr;
205 o->data = svcxdr_savemem(argp, p, len);
207 return nfserr_jukebox;
214 nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
218 if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
219 return nfserr_bad_xdr;
220 p = xdr_inline_decode(argp->xdr, *lenp);
222 return nfserr_bad_xdr;
223 status = check_filename((char *)p, *lenp);
226 *namp = svcxdr_savemem(argp, p, *lenp);
228 return nfserr_jukebox;
234 nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
238 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
240 return nfserr_bad_xdr;
241 p = xdr_decode_hyper(p, &tv->tv_sec);
242 tv->tv_nsec = be32_to_cpup(p++);
243 if (tv->tv_nsec >= (u32)1000000000)
249 nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
253 p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
255 return nfserr_bad_xdr;
256 memcpy(verf->data, p, sizeof(verf->data));
261 * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4
262 * @argp: NFSv4 compound argument structure
263 * @bmval: pointer to an array of u32's to decode into
264 * @bmlen: size of the @bmval array
266 * The server needs to return nfs_ok rather than nfserr_bad_xdr when
267 * encountering bitmaps containing bits it does not recognize. This
268 * includes bits in bitmap words past WORDn, where WORDn is the last
269 * bitmap WORD the implementation currently supports. Thus we are
270 * careful here to simply ignore bits in bitmap words that this
271 * implementation has yet to support explicitly.
274 * %nfs_ok: @bmval populated successfully
275 * %nfserr_bad_xdr: the encoded bitmap was invalid
278 nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
282 status = xdr_stream_decode_uint32_array(argp->xdr, bmval, bmlen);
283 return status == -EBADMSG ? nfserr_bad_xdr : nfs_ok;
287 nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
292 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
293 return nfserr_bad_xdr;
294 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
295 return nfserr_bad_xdr;
296 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
297 return nfserr_bad_xdr;
299 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
300 return nfserr_bad_xdr;
301 p = xdr_inline_decode(argp->xdr, length);
303 return nfserr_bad_xdr;
304 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
305 if (ace->whotype != NFS4_ACL_WHO_NAMED)
307 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
308 status = nfsd_map_name_to_gid(argp->rqstp,
309 (char *)p, length, &ace->who_gid);
311 status = nfsd_map_name_to_uid(argp->rqstp,
312 (char *)p, length, &ace->who_uid);
317 /* A counted array of nfsace4's */
318 static noinline __be32
319 nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
321 struct nfs4_ace *ace;
325 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
326 return nfserr_bad_xdr;
328 if (count > xdr_stream_remaining(argp->xdr) / 20)
330 * Even with 4-byte names there wouldn't be
331 * space for that many aces; something fishy is
336 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
338 return nfserr_jukebox;
340 (*acl)->naces = count;
341 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
342 status = nfsd4_decode_nfsace4(argp, ace);
350 static noinline __be32
351 nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
352 struct xdr_netobj *label)
357 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
358 return nfserr_bad_xdr;
359 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
360 return nfserr_bad_xdr;
362 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
363 return nfserr_bad_xdr;
364 if (length > NFS4_MAXLABELLEN)
365 return nfserr_badlabel;
366 p = xdr_inline_decode(argp->xdr, length);
368 return nfserr_bad_xdr;
370 label->data = svcxdr_dupstr(argp, p, length);
372 return nfserr_jukebox;
378 nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
379 struct iattr *iattr, struct nfs4_acl **acl,
380 struct xdr_netobj *label, int *umask)
382 unsigned int starting_pos;
387 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
389 return nfserr_bad_xdr;
391 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
392 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
393 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
394 if (nfsd_attrs_supported(argp->minorversion, bmval))
396 return nfserr_attrnotsupp;
399 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
400 return nfserr_bad_xdr;
401 starting_pos = xdr_stream_pos(argp->xdr);
403 if (bmval[0] & FATTR4_WORD0_SIZE) {
406 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
407 return nfserr_bad_xdr;
408 iattr->ia_size = size;
409 iattr->ia_valid |= ATTR_SIZE;
411 if (bmval[0] & FATTR4_WORD0_ACL) {
412 status = nfsd4_decode_acl(argp, acl);
417 if (bmval[1] & FATTR4_WORD1_MODE) {
420 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
421 return nfserr_bad_xdr;
422 iattr->ia_mode = mode;
423 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
424 iattr->ia_valid |= ATTR_MODE;
426 if (bmval[1] & FATTR4_WORD1_OWNER) {
429 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
430 return nfserr_bad_xdr;
431 p = xdr_inline_decode(argp->xdr, length);
433 return nfserr_bad_xdr;
434 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
438 iattr->ia_valid |= ATTR_UID;
440 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
443 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
444 return nfserr_bad_xdr;
445 p = xdr_inline_decode(argp->xdr, length);
447 return nfserr_bad_xdr;
448 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
452 iattr->ia_valid |= ATTR_GID;
454 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
457 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
458 return nfserr_bad_xdr;
460 case NFS4_SET_TO_CLIENT_TIME:
461 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
464 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
466 case NFS4_SET_TO_SERVER_TIME:
467 iattr->ia_valid |= ATTR_ATIME;
470 return nfserr_bad_xdr;
473 if (bmval[1] & FATTR4_WORD1_TIME_CREATE) {
474 struct timespec64 ts;
476 /* No Linux filesystem supports setting this attribute. */
477 bmval[1] &= ~FATTR4_WORD1_TIME_CREATE;
478 status = nfsd4_decode_nfstime4(argp, &ts);
482 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
485 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
486 return nfserr_bad_xdr;
488 case NFS4_SET_TO_CLIENT_TIME:
489 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
492 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
494 case NFS4_SET_TO_SERVER_TIME:
495 iattr->ia_valid |= ATTR_MTIME;
498 return nfserr_bad_xdr;
502 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
503 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
504 status = nfsd4_decode_security_label(argp, label);
508 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
512 return nfserr_bad_xdr;
513 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
514 return nfserr_bad_xdr;
515 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
516 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
517 return nfserr_bad_xdr;
518 *umask = mask & S_IRWXUGO;
519 iattr->ia_valid |= ATTR_MODE;
522 /* request sanity: did attrlist4 contain the expected number of words? */
523 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
524 return nfserr_bad_xdr;
530 nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
534 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
536 return nfserr_bad_xdr;
537 sid->si_generation = be32_to_cpup(p++);
538 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
543 nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
547 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
549 return nfserr_bad_xdr;
550 memcpy(clientid, p, sizeof(*clientid));
555 nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
556 clientid_t *clientid, struct xdr_netobj *owner)
560 status = nfsd4_decode_clientid4(argp, clientid);
563 return nfsd4_decode_opaque(argp, owner);
566 #ifdef CONFIG_NFSD_PNFS
568 nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
569 struct nfsd4_deviceid *devid)
573 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
575 return nfserr_bad_xdr;
576 memcpy(devid, p, sizeof(*devid));
581 nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
582 struct nfsd4_layoutcommit *lcp)
584 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
585 return nfserr_bad_xdr;
586 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
587 return nfserr_bad_xdr;
588 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
589 return nfserr_bad_xdr;
591 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
592 return nfserr_bad_xdr;
593 if (lcp->lc_up_len > 0) {
594 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
595 if (!lcp->lc_up_layout)
596 return nfserr_bad_xdr;
603 nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
604 struct nfsd4_layoutreturn *lrp)
608 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
609 return nfserr_bad_xdr;
610 switch (lrp->lr_return_type) {
612 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
613 return nfserr_bad_xdr;
614 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
615 return nfserr_bad_xdr;
616 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
619 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
620 return nfserr_bad_xdr;
621 if (lrp->lrf_body_len > 0) {
622 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
624 return nfserr_bad_xdr;
629 lrp->lr_seg.offset = 0;
630 lrp->lr_seg.length = NFS4_MAX_UINT64;
633 return nfserr_bad_xdr;
639 #endif /* CONFIG_NFSD_PNFS */
642 nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
643 struct nfs4_sessionid *sessionid)
647 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
649 return nfserr_bad_xdr;
650 memcpy(sessionid->data, p, sizeof(sessionid->data));
654 /* Defined in Appendix A of RFC 5531 */
656 nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
657 struct nfsd4_cb_sec *cbs)
659 u32 stamp, gidcount, uid, gid;
662 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
663 return nfserr_bad_xdr;
665 status = nfsd4_decode_ignored_string(argp, 255);
668 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
669 return nfserr_bad_xdr;
670 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
671 return nfserr_bad_xdr;
672 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
673 return nfserr_bad_xdr;
675 return nfserr_bad_xdr;
676 p = xdr_inline_decode(argp->xdr, gidcount << 2);
678 return nfserr_bad_xdr;
679 if (cbs->flavor == (u32)(-1)) {
680 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
682 kuid_t kuid = make_kuid(userns, uid);
683 kgid_t kgid = make_kgid(userns, gid);
684 if (uid_valid(kuid) && gid_valid(kgid)) {
687 cbs->flavor = RPC_AUTH_UNIX;
689 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
697 nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
698 struct nfsd4_cb_sec *cbs)
703 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
705 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
706 return nfserr_bad_xdr;
707 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
708 return nfserr_bad_xdr;
709 /* gcbp_handle_from_server */
710 status = nfsd4_decode_ignored_string(argp, 0);
713 /* gcbp_handle_from_client */
714 status = nfsd4_decode_ignored_string(argp, 0);
721 /* a counted array of callback_sec_parms4 items */
723 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
725 u32 i, secflavor, nr_secflavs;
728 /* callback_sec_params4 */
729 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
730 return nfserr_bad_xdr;
732 cbs->flavor = (u32)(-1);
734 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
737 for (i = 0; i < nr_secflavs; ++i) {
738 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
739 return nfserr_bad_xdr;
743 if (cbs->flavor == (u32)(-1))
744 cbs->flavor = RPC_AUTH_NULL;
747 status = nfsd4_decode_authsys_parms(argp, cbs);
752 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
766 * NFSv4 operation argument decoders
770 nfsd4_decode_access(struct nfsd4_compoundargs *argp,
771 struct nfsd4_access *access)
773 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
774 return nfserr_bad_xdr;
779 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
781 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
782 return nfserr_bad_xdr;
783 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
788 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
790 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
791 return nfserr_bad_xdr;
792 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
793 return nfserr_bad_xdr;
798 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
802 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
803 return nfserr_bad_xdr;
804 switch (create->cr_type) {
806 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
807 return nfserr_bad_xdr;
808 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
810 return nfserr_bad_xdr;
811 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
812 if (!create->cr_data)
813 return nfserr_jukebox;
817 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
818 return nfserr_bad_xdr;
819 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
820 return nfserr_bad_xdr;
828 status = nfsd4_decode_component4(argp, &create->cr_name,
829 &create->cr_namelen);
832 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
833 ARRAY_SIZE(create->cr_bmval),
834 &create->cr_iattr, &create->cr_acl,
835 &create->cr_label, &create->cr_umask);
843 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
845 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
849 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
851 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
852 ARRAY_SIZE(getattr->ga_bmval));
856 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
858 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
862 nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
863 struct nfsd4_lock *lock)
867 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
868 return nfserr_bad_xdr;
869 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
872 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
873 return nfserr_bad_xdr;
874 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
875 &lock->lk_new_owner);
879 nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
880 struct nfsd4_lock *lock)
884 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
887 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
888 return nfserr_bad_xdr;
894 nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
896 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
897 return nfserr_bad_xdr;
899 return nfsd4_decode_open_to_lock_owner4(argp, lock);
900 return nfsd4_decode_exist_lock_owner4(argp, lock);
904 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
906 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
907 return nfserr_bad_xdr;
908 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
909 return nfserr_bad_xdr;
910 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
911 return nfserr_bad_xdr;
912 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
913 return nfserr_bad_xdr;
914 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
915 return nfserr_bad_xdr;
916 return nfsd4_decode_locker4(argp, lock);
920 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
922 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
923 return nfserr_bad_xdr;
924 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
925 return nfserr_bad_xdr;
926 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
927 return nfserr_bad_xdr;
928 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
929 return nfserr_bad_xdr;
930 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
935 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
939 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
940 return nfserr_bad_xdr;
941 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
942 return nfserr_bad_xdr;
943 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
944 return nfserr_bad_xdr;
945 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
948 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
949 return nfserr_bad_xdr;
950 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
951 return nfserr_bad_xdr;
957 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
959 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
963 nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
967 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
968 return nfserr_bad_xdr;
969 switch (open->op_createmode) {
970 case NFS4_CREATE_UNCHECKED:
971 case NFS4_CREATE_GUARDED:
972 status = nfsd4_decode_fattr4(argp, open->op_bmval,
973 ARRAY_SIZE(open->op_bmval),
974 &open->op_iattr, &open->op_acl,
975 &open->op_label, &open->op_umask);
979 case NFS4_CREATE_EXCLUSIVE:
980 status = nfsd4_decode_verifier4(argp, &open->op_verf);
984 case NFS4_CREATE_EXCLUSIVE4_1:
985 if (argp->minorversion < 1)
986 return nfserr_bad_xdr;
987 status = nfsd4_decode_verifier4(argp, &open->op_verf);
990 status = nfsd4_decode_fattr4(argp, open->op_bmval,
991 ARRAY_SIZE(open->op_bmval),
992 &open->op_iattr, &open->op_acl,
993 &open->op_label, &open->op_umask);
998 return nfserr_bad_xdr;
1005 nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1009 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1010 return nfserr_bad_xdr;
1011 switch (open->op_create) {
1012 case NFS4_OPEN_NOCREATE:
1014 case NFS4_OPEN_CREATE:
1015 status = nfsd4_decode_createhow4(argp, open);
1020 return nfserr_bad_xdr;
1026 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
1030 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1031 return nfserr_bad_xdr;
1032 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1033 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1035 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1037 switch (w & NFS4_SHARE_ACCESS_MASK) {
1038 case NFS4_SHARE_ACCESS_READ:
1039 case NFS4_SHARE_ACCESS_WRITE:
1040 case NFS4_SHARE_ACCESS_BOTH:
1043 return nfserr_bad_xdr;
1045 w &= ~NFS4_SHARE_ACCESS_MASK;
1048 if (!argp->minorversion)
1049 return nfserr_bad_xdr;
1050 switch (w & NFS4_SHARE_WANT_MASK) {
1051 case NFS4_SHARE_WANT_NO_PREFERENCE:
1052 case NFS4_SHARE_WANT_READ_DELEG:
1053 case NFS4_SHARE_WANT_WRITE_DELEG:
1054 case NFS4_SHARE_WANT_ANY_DELEG:
1055 case NFS4_SHARE_WANT_NO_DELEG:
1056 case NFS4_SHARE_WANT_CANCEL:
1059 return nfserr_bad_xdr;
1061 w &= ~NFS4_SHARE_WANT_MASK;
1065 if (!deleg_when) /* open_downgrade */
1066 return nfserr_inval;
1068 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1069 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
1070 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1071 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
1074 return nfserr_bad_xdr;
1077 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1079 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1080 return nfserr_bad_xdr;
1081 /* Note: unlike access bits, deny bits may be zero. */
1082 if (*x & ~NFS4_SHARE_DENY_BOTH)
1083 return nfserr_bad_xdr;
1089 nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1090 struct nfsd4_open *open)
1094 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1095 return nfserr_bad_xdr;
1096 switch (open->op_claim_type) {
1097 case NFS4_OPEN_CLAIM_NULL:
1098 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1099 status = nfsd4_decode_component4(argp, &open->op_fname,
1100 &open->op_fnamelen);
1104 case NFS4_OPEN_CLAIM_PREVIOUS:
1105 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1106 return nfserr_bad_xdr;
1108 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1109 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1112 status = nfsd4_decode_component4(argp, &open->op_fname,
1113 &open->op_fnamelen);
1117 case NFS4_OPEN_CLAIM_FH:
1118 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1119 if (argp->minorversion < 1)
1120 return nfserr_bad_xdr;
1123 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1124 if (argp->minorversion < 1)
1125 return nfserr_bad_xdr;
1126 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1131 return nfserr_bad_xdr;
1138 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1143 memset(open->op_bmval, 0, sizeof(open->op_bmval));
1144 open->op_iattr.ia_valid = 0;
1145 open->op_openowner = NULL;
1147 open->op_xdr_error = 0;
1148 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1149 return nfserr_bad_xdr;
1150 /* deleg_want is ignored */
1151 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1152 &open->op_deleg_want, &dummy);
1155 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1158 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1162 status = nfsd4_decode_openflag4(argp, open);
1165 return nfsd4_decode_open_claim4(argp, open);
1169 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1173 if (argp->minorversion >= 1)
1174 return nfserr_notsupp;
1176 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
1179 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1180 return nfserr_bad_xdr;
1186 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1190 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
1193 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1194 return nfserr_bad_xdr;
1195 /* deleg_want is ignored */
1196 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1197 &open_down->od_deleg_want, NULL);
1200 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1204 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1208 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1209 return nfserr_bad_xdr;
1210 if (putfh->pf_fhlen > NFS4_FHSIZE)
1211 return nfserr_bad_xdr;
1212 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1214 return nfserr_bad_xdr;
1215 putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
1216 if (!putfh->pf_fhval)
1217 return nfserr_jukebox;
1223 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1225 if (argp->minorversion == 0)
1227 return nfserr_notsupp;
1231 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1235 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
1238 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1239 return nfserr_bad_xdr;
1240 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1241 return nfserr_bad_xdr;
1247 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1251 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1252 return nfserr_bad_xdr;
1253 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1256 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1257 return nfserr_bad_xdr;
1258 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1259 return nfserr_bad_xdr;
1260 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1261 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1262 return nfserr_bad_xdr;
1268 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1270 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1274 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1278 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1281 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1285 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1287 return nfsd4_decode_clientid4(argp, clientid);
1291 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1292 struct nfsd4_secinfo *secinfo)
1294 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
1298 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1302 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
1305 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1306 ARRAY_SIZE(setattr->sa_bmval),
1307 &setattr->sa_iattr, &setattr->sa_acl,
1308 &setattr->sa_label, NULL);
1312 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1316 if (argp->minorversion >= 1)
1317 return nfserr_notsupp;
1319 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1322 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1325 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
1326 return nfserr_bad_xdr;
1327 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1328 return nfserr_bad_xdr;
1329 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1331 return nfserr_bad_xdr;
1332 setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
1333 setclientid->se_callback_netid_len);
1334 if (!setclientid->se_callback_netid_val)
1335 return nfserr_jukebox;
1337 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1338 return nfserr_bad_xdr;
1339 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1341 return nfserr_bad_xdr;
1342 setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
1343 setclientid->se_callback_addr_len);
1344 if (!setclientid->se_callback_addr_val)
1345 return nfserr_jukebox;
1346 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1347 return nfserr_bad_xdr;
1353 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1357 if (argp->minorversion >= 1)
1358 return nfserr_notsupp;
1360 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1363 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1366 /* Also used for NVERIFY */
1368 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1372 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1373 ARRAY_SIZE(verify->ve_bmval));
1377 /* For convenience's sake, we compare raw xdr'd attributes in
1378 * nfsd4_proc_verify */
1380 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1381 return nfserr_bad_xdr;
1382 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1384 return nfserr_bad_xdr;
1385 verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
1386 if (!verify->ve_attrval)
1387 return nfserr_jukebox;
1393 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1397 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
1400 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1401 return nfserr_bad_xdr;
1402 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1403 return nfserr_bad_xdr;
1404 if (write->wr_stable_how > NFS_FILE_SYNC)
1405 return nfserr_bad_xdr;
1406 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1407 return nfserr_bad_xdr;
1408 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
1409 return nfserr_bad_xdr;
1415 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1419 if (argp->minorversion >= 1)
1420 return nfserr_notsupp;
1422 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1423 &rlockowner->rl_owner);
1427 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1428 return nfserr_inval;
1433 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
1435 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1436 return nfserr_bad_xdr;
1437 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1440 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
1442 u32 use_conn_in_rdma_mode;
1445 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1448 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1449 return nfserr_bad_xdr;
1450 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1451 return nfserr_bad_xdr;
1457 nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1458 struct nfsd4_exchange_id *exid)
1462 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1463 ARRAY_SIZE(exid->spo_must_enforce));
1465 return nfserr_bad_xdr;
1466 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1467 ARRAY_SIZE(exid->spo_must_allow));
1469 return nfserr_bad_xdr;
1475 * This implementation currently does not support SP4_SSV.
1476 * This decoder simply skips over these arguments.
1478 static noinline __be32
1479 nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1480 struct nfsd4_exchange_id *exid)
1482 u32 count, window, num_gss_handles;
1486 status = nfsd4_decode_state_protect_ops(argp, exid);
1490 /* ssp_hash_algs<> */
1491 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1492 return nfserr_bad_xdr;
1494 status = nfsd4_decode_ignored_string(argp, 0);
1499 /* ssp_encr_algs<> */
1500 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1501 return nfserr_bad_xdr;
1503 status = nfsd4_decode_ignored_string(argp, 0);
1508 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1509 return nfserr_bad_xdr;
1510 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1511 return nfserr_bad_xdr;
1517 nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1518 struct nfsd4_exchange_id *exid)
1522 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
1523 return nfserr_bad_xdr;
1524 switch (exid->spa_how) {
1528 status = nfsd4_decode_state_protect_ops(argp, exid);
1533 status = nfsd4_decode_ssv_sp_parms(argp, exid);
1538 return nfserr_bad_xdr;
1545 nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1546 struct nfsd4_exchange_id *exid)
1551 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1552 return nfserr_bad_xdr;
1557 /* Note that RFC 8881 places no length limit on
1558 * nii_domain, but this implementation permits no
1559 * more than NFS4_OPAQUE_LIMIT bytes */
1560 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1563 /* Note that RFC 8881 places no length limit on
1564 * nii_name, but this implementation permits no
1565 * more than NFS4_OPAQUE_LIMIT bytes */
1566 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1569 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1574 return nfserr_bad_xdr;
1581 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1582 struct nfsd4_exchange_id *exid)
1586 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1589 status = nfsd4_decode_opaque(argp, &exid->clname);
1592 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1593 return nfserr_bad_xdr;
1594 status = nfsd4_decode_state_protect4_a(argp, exid);
1597 return nfsd4_decode_nfs_impl_id4(argp, exid);
1601 nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1602 struct nfsd4_channel_attrs *ca)
1606 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1608 return nfserr_bad_xdr;
1610 /* headerpadsz is ignored */
1612 ca->maxreq_sz = be32_to_cpup(p++);
1613 ca->maxresp_sz = be32_to_cpup(p++);
1614 ca->maxresp_cached = be32_to_cpup(p++);
1615 ca->maxops = be32_to_cpup(p++);
1616 ca->maxreqs = be32_to_cpup(p++);
1617 ca->nr_rdma_attrs = be32_to_cpup(p);
1618 switch (ca->nr_rdma_attrs) {
1622 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1623 return nfserr_bad_xdr;
1626 return nfserr_bad_xdr;
1633 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1634 struct nfsd4_create_session *sess)
1638 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1641 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1642 return nfserr_bad_xdr;
1643 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1644 return nfserr_bad_xdr;
1645 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1648 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
1651 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1652 return nfserr_bad_xdr;
1653 status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1661 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1662 struct nfsd4_destroy_session *destroy_session)
1664 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
1668 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1669 struct nfsd4_free_stateid *free_stateid)
1671 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
1674 #ifdef CONFIG_NFSD_PNFS
1676 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1677 struct nfsd4_getdeviceinfo *gdev)
1681 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1684 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1685 return nfserr_bad_xdr;
1686 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1687 return nfserr_bad_xdr;
1688 if (xdr_stream_decode_uint32_array(argp->xdr,
1689 &gdev->gd_notify_types, 1) < 0)
1690 return nfserr_bad_xdr;
1696 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1697 struct nfsd4_layoutcommit *lcp)
1701 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1702 return nfserr_bad_xdr;
1703 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1704 return nfserr_bad_xdr;
1705 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1706 return nfserr_bad_xdr;
1707 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1710 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1711 return nfserr_bad_xdr;
1712 if (lcp->lc_newoffset) {
1713 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1714 return nfserr_bad_xdr;
1716 lcp->lc_last_wr = 0;
1717 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1719 return nfserr_bad_xdr;
1720 if (xdr_item_is_present(p)) {
1721 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1725 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1727 return nfsd4_decode_layoutupdate4(argp, lcp);
1731 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1732 struct nfsd4_layoutget *lgp)
1736 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1737 return nfserr_bad_xdr;
1738 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1739 return nfserr_bad_xdr;
1740 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1741 return nfserr_bad_xdr;
1742 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1743 return nfserr_bad_xdr;
1744 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1745 return nfserr_bad_xdr;
1746 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1747 return nfserr_bad_xdr;
1748 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
1751 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1752 return nfserr_bad_xdr;
1758 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1759 struct nfsd4_layoutreturn *lrp)
1761 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1762 return nfserr_bad_xdr;
1763 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1764 return nfserr_bad_xdr;
1765 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1766 return nfserr_bad_xdr;
1767 return nfsd4_decode_layoutreturn4(argp, lrp);
1769 #endif /* CONFIG_NFSD_PNFS */
1771 static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1772 struct nfsd4_secinfo_no_name *sin)
1774 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1775 return nfserr_bad_xdr;
1780 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1781 struct nfsd4_sequence *seq)
1785 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1788 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1790 return nfserr_bad_xdr;
1791 seq->seqid = be32_to_cpup(p++);
1792 seq->slotid = be32_to_cpup(p++);
1793 seq->maxslots = be32_to_cpup(p++);
1794 seq->cachethis = be32_to_cpup(p);
1800 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1802 struct nfsd4_test_stateid_id *stateid;
1806 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1807 return nfserr_bad_xdr;
1809 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1810 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1811 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1813 return nfserr_jukebox;
1814 INIT_LIST_HEAD(&stateid->ts_id_list);
1815 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1816 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1824 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1825 struct nfsd4_destroy_clientid *dc)
1827 return nfsd4_decode_clientid4(argp, &dc->clientid);
1830 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1831 struct nfsd4_reclaim_complete *rc)
1833 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1834 return nfserr_bad_xdr;
1839 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1840 struct nfsd4_fallocate *fallocate)
1844 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
1847 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1848 return nfserr_bad_xdr;
1849 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1850 return nfserr_bad_xdr;
1855 static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1856 struct nl4_server *ns)
1858 struct nfs42_netaddr *naddr;
1861 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1862 return nfserr_bad_xdr;
1864 /* currently support for 1 inter-server source server */
1865 switch (ns->nl4_type) {
1867 naddr = &ns->u.nl4_addr;
1869 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1870 return nfserr_bad_xdr;
1871 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1872 return nfserr_bad_xdr;
1874 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1876 return nfserr_bad_xdr;
1877 memcpy(naddr->netid, p, naddr->netid_len);
1879 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1880 return nfserr_bad_xdr;
1881 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1882 return nfserr_bad_xdr;
1884 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1886 return nfserr_bad_xdr;
1887 memcpy(naddr->addr, p, naddr->addr_len);
1890 return nfserr_bad_xdr;
1897 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1899 u32 consecutive, i, count, sync;
1900 struct nl4_server *ns_dummy;
1903 status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid);
1906 status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid);
1909 if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0)
1910 return nfserr_bad_xdr;
1911 if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0)
1912 return nfserr_bad_xdr;
1913 if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0)
1914 return nfserr_bad_xdr;
1915 /* ca_consecutive: we always do consecutive copies */
1916 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1917 return nfserr_bad_xdr;
1918 if (xdr_stream_decode_bool(argp->xdr, &sync) < 0)
1919 return nfserr_bad_xdr;
1920 nfsd4_copy_set_sync(copy, sync);
1922 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1923 return nfserr_bad_xdr;
1924 copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src));
1925 if (copy->cp_src == NULL)
1926 return nfserr_jukebox;
1927 if (count == 0) { /* intra-server copy */
1928 __set_bit(NFSD4_COPY_F_INTRA, ©->cp_flags);
1932 /* decode all the supplied server addresses but use only the first */
1933 status = nfsd4_decode_nl4_server(argp, copy->cp_src);
1937 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1938 if (ns_dummy == NULL)
1939 return nfserr_jukebox;
1940 for (i = 0; i < count - 1; i++) {
1941 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1953 nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1954 struct nfsd4_copy_notify *cn)
1958 cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src));
1959 if (cn->cpn_src == NULL)
1960 return nfserr_jukebox;
1961 cn->cpn_dst = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_dst));
1962 if (cn->cpn_dst == NULL)
1963 return nfserr_jukebox;
1965 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
1968 return nfsd4_decode_nl4_server(argp, cn->cpn_dst);
1972 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1973 struct nfsd4_offload_status *os)
1975 return nfsd4_decode_stateid4(argp, &os->stateid);
1979 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1983 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
1986 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
1987 return nfserr_bad_xdr;
1988 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
1989 return nfserr_bad_xdr;
1995 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1999 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
2002 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
2005 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
2006 return nfserr_bad_xdr;
2007 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
2008 return nfserr_bad_xdr;
2009 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2010 return nfserr_bad_xdr;
2016 * XDR data that is more than PAGE_SIZE in size is normally part of a
2017 * read or write. However, the size of extended attributes is limited
2018 * by the maximum request size, and then further limited by the underlying
2019 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2020 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2021 * and we're not dealing with contiguous pages, we need to do some copying.
2025 * Decode data into buffer.
2028 nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2029 char **bufp, u32 buflen)
2031 struct page **pages = xdr->pages;
2032 struct kvec *head = xdr->head;
2036 if (buflen <= head->iov_len) {
2038 * We're in luck, the head has enough space. Just return
2039 * the head, no need for copying.
2041 *bufp = head->iov_base;
2045 tmp = svcxdr_tmpalloc(argp, buflen);
2047 return nfserr_jukebox;
2050 memcpy(dp, head->iov_base, head->iov_len);
2051 buflen -= head->iov_len;
2052 dp += head->iov_len;
2054 while (buflen > 0) {
2055 len = min_t(u32, buflen, PAGE_SIZE);
2056 memcpy(dp, page_address(*pages), len);
2068 * Get a user extended attribute name from the XDR buffer.
2069 * It will not have the "user." prefix, so prepend it.
2070 * Lastly, check for nul characters in the name.
2073 nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2075 char *name, *sp, *dp;
2079 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2080 return nfserr_bad_xdr;
2081 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2082 return nfserr_nametoolong;
2084 return nfserr_bad_xdr;
2085 p = xdr_inline_decode(argp->xdr, namelen);
2087 return nfserr_bad_xdr;
2088 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2090 return nfserr_jukebox;
2091 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2094 * Copy the extended attribute name over while checking for 0
2098 dp = name + XATTR_USER_PREFIX_LEN;
2103 return nfserr_bad_xdr;
2114 * A GETXATTR op request comes without a length specifier. We just set the
2115 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2116 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2117 * check it against getxa_len, and allocate + return the value.
2120 nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2121 struct nfsd4_getxattr *getxattr)
2126 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2130 maxcount = svc_max_payload(argp->rqstp);
2131 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2133 getxattr->getxa_len = maxcount;
2139 nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2140 struct nfsd4_setxattr *setxattr)
2142 u32 flags, maxcount, size;
2145 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2146 return nfserr_bad_xdr;
2148 if (flags > SETXATTR4_REPLACE)
2149 return nfserr_inval;
2150 setxattr->setxa_flags = flags;
2152 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2156 maxcount = svc_max_payload(argp->rqstp);
2157 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2159 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2160 return nfserr_bad_xdr;
2161 if (size > maxcount)
2162 return nfserr_xattr2big;
2164 setxattr->setxa_len = size;
2166 struct xdr_buf payload;
2168 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
2169 return nfserr_bad_xdr;
2170 status = nfsd4_vbuf_from_vector(argp, &payload,
2171 &setxattr->setxa_buf, size);
2178 nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2179 struct nfsd4_listxattrs *listxattrs)
2183 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2184 return nfserr_bad_xdr;
2187 * If the cookie is too large to have even one user.x attribute
2188 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2190 if (listxattrs->lsxa_cookie >=
2191 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2192 return nfserr_badcookie;
2194 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2195 return nfserr_bad_xdr;
2197 /* Always need at least 2 words (length and one character) */
2198 return nfserr_inval;
2200 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2201 listxattrs->lsxa_maxcount = maxcount;
2207 nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2208 struct nfsd4_removexattr *removexattr)
2210 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2214 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2220 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2222 return nfserr_notsupp;
2225 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2227 static const nfsd4_dec nfsd4_dec_ops[] = {
2228 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2229 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2230 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2231 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2232 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2233 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2234 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2235 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2236 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2237 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2238 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2239 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2240 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2241 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2242 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2243 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2244 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2245 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2246 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2247 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
2248 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
2249 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2250 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2251 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2252 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2253 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2254 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2255 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2256 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2257 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2258 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2259 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2260 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2261 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2262 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2263 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2264 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2266 /* new operations for NFSv4.1 */
2267 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
2268 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
2269 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2270 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2271 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
2272 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
2273 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2274 #ifdef CONFIG_NFSD_PNFS
2275 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2276 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2277 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2278 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2279 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2281 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2282 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2283 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2284 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2285 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
2287 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
2288 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2289 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
2290 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
2291 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2292 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
2293 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2295 /* new operations for NFSv4.2 */
2296 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2297 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
2298 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
2299 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2300 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2301 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2302 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
2303 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
2304 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
2305 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
2306 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
2307 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
2308 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2309 /* RFC 8276 extended atributes operations */
2310 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2311 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2312 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2313 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2317 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2319 if (op->opnum < FIRST_NFS4_OP)
2321 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
2323 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2325 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
2331 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2333 struct nfsd4_op *op;
2334 bool cachethis = false;
2335 int auth_slack= argp->rqstp->rq_auth_slack;
2336 int max_reply = auth_slack + 8; /* opcnt, status */
2342 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
2344 max_reply += XDR_UNIT;
2346 if (unlikely(argp->taglen)) {
2347 if (argp->taglen > NFSD4_MAX_TAGLEN)
2349 p = xdr_inline_decode(argp->xdr, argp->taglen);
2352 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
2355 max_reply += xdr_align_size(argp->taglen);
2358 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
2360 if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
2364 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2365 * here, so we return success at the xdr level so that
2366 * nfsd4_proc can handle this is an NFS-level error.
2368 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2371 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
2372 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
2374 argp->ops = argp->iops;
2375 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
2380 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
2383 for (i = 0; i < argp->opcnt; i++) {
2387 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
2389 if (nfsd4_opnum_in_range(argp, op)) {
2390 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
2391 if (op->status != nfs_ok)
2392 trace_nfsd_compound_decode_err(argp->rqstp,
2397 op->opnum = OP_ILLEGAL;
2398 op->status = nfserr_op_illegal;
2400 op->opdesc = OPDESC(op);
2402 * We'll try to cache the result in the DRC if any one
2403 * op in the compound wants to be cached:
2405 cachethis |= nfsd4_cache_this_op(op);
2407 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
2409 readbytes += nfsd4_max_reply(argp->rqstp, op);
2411 max_reply += nfsd4_max_reply(argp->rqstp, op);
2413 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2414 * (Special case because it will just skip encoding this
2415 * if it runs out of xdr buffer space, and it is the only
2416 * operation that behaves this way.)
2418 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
2419 max_reply += NFS4_OPAQUE_LIMIT;
2426 /* Sessions make the DRC unnecessary: */
2427 if (argp->minorversion)
2429 svc_reserve(argp->rqstp, max_reply + readbytes);
2430 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
2432 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
2433 __clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
2438 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2439 struct svc_export *exp)
2441 if (exp->ex_flags & NFSEXP_V4ROOT) {
2442 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2445 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
2450 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2451 * doesn't really care what resolution could theoretically be stored by
2454 * The client cares how close together changes can be while still
2455 * guaranteeing ctime changes. For most filesystems (which have
2456 * timestamps with nanosecond fields) that is limited by the resolution
2457 * of the time returned from current_time() (which I'm assuming to be
2460 static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2462 struct timespec64 ts;
2465 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2466 ts = ns_to_timespec64(ns);
2468 p = xdr_encode_hyper(p, ts.tv_sec);
2469 *p++ = cpu_to_be32(ts.tv_nsec);
2474 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
2476 *p++ = cpu_to_be32(c->atomic);
2477 p = xdr_encode_hyper(p, c->before_change);
2478 p = xdr_encode_hyper(p, c->after_change);
2482 /* Encode as an array of strings the string given with components
2483 * separated @sep, escaped with esc_enter and esc_exit.
2485 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2486 char *components, char esc_enter,
2492 int strlen, count=0;
2493 char *str, *end, *next;
2495 dprintk("nfsd4_encode_components(%s)\n", components);
2497 pathlen_offset = xdr->buf->len;
2498 p = xdr_reserve_space(xdr, 4);
2500 return nfserr_resource;
2501 p++; /* We will fill this in with @count later */
2503 end = str = components;
2505 bool found_esc = false;
2507 /* try to parse as esc_start, ..., esc_end, sep */
2508 if (*str == esc_enter) {
2509 for (; *end && (*end != esc_exit); end++)
2510 /* find esc_exit or end of string */;
2512 if (*end && (!*next || *next == sep)) {
2519 for (; *end && (*end != sep); end++)
2520 /* find sep or end of string */;
2524 p = xdr_reserve_space(xdr, strlen + 4);
2526 return nfserr_resource;
2527 p = xdr_encode_opaque(p, str, strlen);
2537 pathlen = htonl(count);
2538 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2542 /* Encode as an array of strings the string given with components
2545 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2548 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2552 * encode a location element of a fs_locations structure
2554 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2555 struct nfsd4_fs_location *location)
2559 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2563 status = nfsd4_encode_components(xdr, '/', location->path);
2570 * Encode a path in RFC3530 'pathname4' format
2572 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2573 const struct path *root,
2574 const struct path *path)
2576 struct path cur = *path;
2578 struct dentry **components = NULL;
2579 unsigned int ncomponents = 0;
2580 __be32 err = nfserr_jukebox;
2582 dprintk("nfsd4_encode_components(");
2585 /* First walk the path up to the nfsd root, and store the
2586 * dentries/path components in an array.
2589 if (path_equal(&cur, root))
2591 if (cur.dentry == cur.mnt->mnt_root) {
2592 if (follow_up(&cur))
2596 if ((ncomponents & 15) == 0) {
2597 struct dentry **new;
2598 new = krealloc(components,
2599 sizeof(*new) * (ncomponents + 16),
2605 components[ncomponents++] = cur.dentry;
2606 cur.dentry = dget_parent(cur.dentry);
2608 err = nfserr_resource;
2609 p = xdr_reserve_space(xdr, 4);
2612 *p++ = cpu_to_be32(ncomponents);
2614 while (ncomponents) {
2615 struct dentry *dentry = components[ncomponents - 1];
2618 spin_lock(&dentry->d_lock);
2619 len = dentry->d_name.len;
2620 p = xdr_reserve_space(xdr, len + 4);
2622 spin_unlock(&dentry->d_lock);
2625 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2626 dprintk("/%pd", dentry);
2627 spin_unlock(&dentry->d_lock);
2636 dput(components[--ncomponents]);
2642 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2643 struct svc_rqst *rqstp, const struct path *path)
2645 struct svc_export *exp_ps;
2648 exp_ps = rqst_find_fsidzero_export(rqstp);
2650 return nfserrno(PTR_ERR(exp_ps));
2651 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2657 * encode a fs_locations structure
2659 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2660 struct svc_rqst *rqstp, struct svc_export *exp)
2665 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2667 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2670 p = xdr_reserve_space(xdr, 4);
2672 return nfserr_resource;
2673 *p++ = cpu_to_be32(fslocs->locations_count);
2674 for (i=0; i<fslocs->locations_count; i++) {
2675 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2682 static u32 nfs4_file_type(umode_t mode)
2684 switch (mode & S_IFMT) {
2685 case S_IFIFO: return NF4FIFO;
2686 case S_IFCHR: return NF4CHR;
2687 case S_IFDIR: return NF4DIR;
2688 case S_IFBLK: return NF4BLK;
2689 case S_IFLNK: return NF4LNK;
2690 case S_IFREG: return NF4REG;
2691 case S_IFSOCK: return NF4SOCK;
2692 default: return NF4BAD;
2696 static inline __be32
2697 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2698 struct nfs4_ace *ace)
2700 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2701 return nfs4_acl_write_who(xdr, ace->whotype);
2702 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2703 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2705 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2708 static inline __be32
2709 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2712 unsigned long i = hweight_long(layout_types);
2714 p = xdr_reserve_space(xdr, 4 + 4 * i);
2716 return nfserr_resource;
2718 *p++ = cpu_to_be32(i);
2720 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2721 if (layout_types & (1 << i))
2722 *p++ = cpu_to_be32(i);
2727 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2728 FATTR4_WORD0_RDATTR_ERROR)
2729 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2730 #define WORD2_ABSENT_FS_ATTRS 0
2732 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2733 static inline __be32
2734 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2735 void *context, int len)
2739 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2741 return nfserr_resource;
2744 * For now we use a 0 here to indicate the null translation; in
2745 * the future we may place a call to translation code here.
2747 *p++ = cpu_to_be32(0); /* lfs */
2748 *p++ = cpu_to_be32(0); /* pi */
2749 p = xdr_encode_opaque(p, context, len);
2753 static inline __be32
2754 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2755 void *context, int len)
2759 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2761 /* As per referral draft: */
2762 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2763 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2764 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2765 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2766 *rdattr_err = NFSERR_MOVED;
2768 return nfserr_moved;
2770 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2771 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2772 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2777 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2779 struct path path = exp->ex_path;
2783 while (follow_up(&path)) {
2784 if (path.dentry != path.mnt->mnt_root)
2787 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2793 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2798 p = xdr_reserve_space(xdr, 16);
2801 *p++ = cpu_to_be32(3);
2802 *p++ = cpu_to_be32(bmval0);
2803 *p++ = cpu_to_be32(bmval1);
2804 *p++ = cpu_to_be32(bmval2);
2805 } else if (bmval1) {
2806 p = xdr_reserve_space(xdr, 12);
2809 *p++ = cpu_to_be32(2);
2810 *p++ = cpu_to_be32(bmval0);
2811 *p++ = cpu_to_be32(bmval1);
2813 p = xdr_reserve_space(xdr, 8);
2816 *p++ = cpu_to_be32(1);
2817 *p++ = cpu_to_be32(bmval0);
2822 return nfserr_resource;
2826 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2830 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2831 struct svc_export *exp,
2832 struct dentry *dentry, u32 *bmval,
2833 struct svc_rqst *rqstp, int ignore_crossmnt)
2835 u32 bmval0 = bmval[0];
2836 u32 bmval1 = bmval[1];
2837 u32 bmval2 = bmval[2];
2839 struct svc_fh *tempfh = NULL;
2840 struct kstatfs statfs;
2841 __be32 *p, *attrlen_p;
2842 int starting_len = xdr->buf->len;
2849 struct nfs4_acl *acl = NULL;
2850 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2851 void *context = NULL;
2854 bool contextsupport = false;
2855 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2856 u32 minorversion = resp->cstate.minorversion;
2857 struct path path = {
2858 .mnt = exp->ex_path.mnt,
2861 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2863 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2864 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2866 if (exp->ex_fslocs.migrated) {
2867 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2872 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2875 if (!(stat.result_mask & STATX_BTIME))
2876 /* underlying FS does not offer btime so we can't share it */
2877 bmval1 &= ~FATTR4_WORD1_TIME_CREATE;
2878 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2879 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2880 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2881 FATTR4_WORD1_SPACE_TOTAL))) {
2882 err = vfs_statfs(&path, &statfs);
2886 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2887 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2888 status = nfserr_jukebox;
2891 fh_init(tempfh, NFS4_FHSIZE);
2892 status = fh_compose(tempfh, exp, dentry, NULL);
2897 if (bmval0 & FATTR4_WORD0_ACL) {
2898 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2899 if (err == -EOPNOTSUPP)
2900 bmval0 &= ~FATTR4_WORD0_ACL;
2901 else if (err == -EINVAL) {
2902 status = nfserr_attrnotsupp;
2904 } else if (err != 0)
2908 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2909 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2910 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2911 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2912 err = security_inode_getsecctx(d_inode(dentry),
2913 &context, &contextlen);
2916 contextsupport = (err == 0);
2917 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2918 if (err == -EOPNOTSUPP)
2919 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2924 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2926 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2930 attrlen_offset = xdr->buf->len;
2931 attrlen_p = xdr_reserve_space(xdr, XDR_UNIT);
2935 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2938 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2940 if (!IS_POSIXACL(dentry->d_inode))
2941 supp[0] &= ~FATTR4_WORD0_ACL;
2942 if (!contextsupport)
2943 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2945 p = xdr_reserve_space(xdr, 12);
2948 *p++ = cpu_to_be32(2);
2949 *p++ = cpu_to_be32(supp[0]);
2950 *p++ = cpu_to_be32(supp[1]);
2952 p = xdr_reserve_space(xdr, 16);
2955 *p++ = cpu_to_be32(3);
2956 *p++ = cpu_to_be32(supp[0]);
2957 *p++ = cpu_to_be32(supp[1]);
2958 *p++ = cpu_to_be32(supp[2]);
2961 if (bmval0 & FATTR4_WORD0_TYPE) {
2962 p = xdr_reserve_space(xdr, 4);
2965 dummy = nfs4_file_type(stat.mode);
2966 if (dummy == NF4BAD) {
2967 status = nfserr_serverfault;
2970 *p++ = cpu_to_be32(dummy);
2972 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2973 p = xdr_reserve_space(xdr, 4);
2976 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2977 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2979 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2980 NFS4_FH_VOL_RENAME);
2982 if (bmval0 & FATTR4_WORD0_CHANGE) {
2983 p = xdr_reserve_space(xdr, 8);
2986 p = encode_change(p, &stat, d_inode(dentry), exp);
2988 if (bmval0 & FATTR4_WORD0_SIZE) {
2989 p = xdr_reserve_space(xdr, 8);
2992 p = xdr_encode_hyper(p, stat.size);
2994 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2995 p = xdr_reserve_space(xdr, 4);
2998 *p++ = cpu_to_be32(1);
3000 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
3001 p = xdr_reserve_space(xdr, 4);
3004 *p++ = cpu_to_be32(1);
3006 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
3007 p = xdr_reserve_space(xdr, 4);
3010 *p++ = cpu_to_be32(0);
3012 if (bmval0 & FATTR4_WORD0_FSID) {
3013 p = xdr_reserve_space(xdr, 16);
3016 if (exp->ex_fslocs.migrated) {
3017 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3018 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
3019 } else switch(fsid_source(fhp)) {
3020 case FSIDSOURCE_FSID:
3021 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3022 p = xdr_encode_hyper(p, (u64)0);
3024 case FSIDSOURCE_DEV:
3025 *p++ = cpu_to_be32(0);
3026 *p++ = cpu_to_be32(MAJOR(stat.dev));
3027 *p++ = cpu_to_be32(0);
3028 *p++ = cpu_to_be32(MINOR(stat.dev));
3030 case FSIDSOURCE_UUID:
3031 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3036 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
3037 p = xdr_reserve_space(xdr, 4);
3040 *p++ = cpu_to_be32(0);
3042 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
3043 p = xdr_reserve_space(xdr, 4);
3046 *p++ = cpu_to_be32(nn->nfsd4_lease);
3048 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
3049 p = xdr_reserve_space(xdr, 4);
3052 *p++ = cpu_to_be32(rdattr_err);
3054 if (bmval0 & FATTR4_WORD0_ACL) {
3055 struct nfs4_ace *ace;
3058 p = xdr_reserve_space(xdr, 4);
3062 *p++ = cpu_to_be32(0);
3065 p = xdr_reserve_space(xdr, 4);
3068 *p++ = cpu_to_be32(acl->naces);
3070 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
3071 p = xdr_reserve_space(xdr, 4*3);
3074 *p++ = cpu_to_be32(ace->type);
3075 *p++ = cpu_to_be32(ace->flag);
3076 *p++ = cpu_to_be32(ace->access_mask &
3078 status = nfsd4_encode_aclname(xdr, rqstp, ace);
3084 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
3085 p = xdr_reserve_space(xdr, 4);
3088 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
3089 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3091 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
3092 p = xdr_reserve_space(xdr, 4);
3095 *p++ = cpu_to_be32(1);
3097 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
3098 p = xdr_reserve_space(xdr, 4);
3101 *p++ = cpu_to_be32(0);
3103 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
3104 p = xdr_reserve_space(xdr, 4);
3107 *p++ = cpu_to_be32(1);
3109 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
3110 p = xdr_reserve_space(xdr, 4);
3113 *p++ = cpu_to_be32(1);
3115 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
3116 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3119 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw,
3120 fhp->fh_handle.fh_size);
3122 if (bmval0 & FATTR4_WORD0_FILEID) {
3123 p = xdr_reserve_space(xdr, 8);
3126 p = xdr_encode_hyper(p, stat.ino);
3128 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
3129 p = xdr_reserve_space(xdr, 8);
3132 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3134 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
3135 p = xdr_reserve_space(xdr, 8);
3138 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3140 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
3141 p = xdr_reserve_space(xdr, 8);
3144 p = xdr_encode_hyper(p, (u64) statfs.f_files);
3146 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
3147 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
3151 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
3152 p = xdr_reserve_space(xdr, 4);
3155 *p++ = cpu_to_be32(1);
3157 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
3158 p = xdr_reserve_space(xdr, 8);
3161 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
3163 if (bmval0 & FATTR4_WORD0_MAXLINK) {
3164 p = xdr_reserve_space(xdr, 4);
3167 *p++ = cpu_to_be32(255);
3169 if (bmval0 & FATTR4_WORD0_MAXNAME) {
3170 p = xdr_reserve_space(xdr, 4);
3173 *p++ = cpu_to_be32(statfs.f_namelen);
3175 if (bmval0 & FATTR4_WORD0_MAXREAD) {
3176 p = xdr_reserve_space(xdr, 8);
3179 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3181 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
3182 p = xdr_reserve_space(xdr, 8);
3185 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3187 if (bmval1 & FATTR4_WORD1_MODE) {
3188 p = xdr_reserve_space(xdr, 4);
3191 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
3193 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
3194 p = xdr_reserve_space(xdr, 4);
3197 *p++ = cpu_to_be32(1);
3199 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
3200 p = xdr_reserve_space(xdr, 4);
3203 *p++ = cpu_to_be32(stat.nlink);
3205 if (bmval1 & FATTR4_WORD1_OWNER) {
3206 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
3210 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
3211 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
3215 if (bmval1 & FATTR4_WORD1_RAWDEV) {
3216 p = xdr_reserve_space(xdr, 8);
3219 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3220 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
3222 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
3223 p = xdr_reserve_space(xdr, 8);
3226 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
3227 p = xdr_encode_hyper(p, dummy64);
3229 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
3230 p = xdr_reserve_space(xdr, 8);
3233 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
3234 p = xdr_encode_hyper(p, dummy64);
3236 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
3237 p = xdr_reserve_space(xdr, 8);
3240 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
3241 p = xdr_encode_hyper(p, dummy64);
3243 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
3244 p = xdr_reserve_space(xdr, 8);
3247 dummy64 = (u64)stat.blocks << 9;
3248 p = xdr_encode_hyper(p, dummy64);
3250 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
3251 p = xdr_reserve_space(xdr, 12);
3254 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
3255 *p++ = cpu_to_be32(stat.atime.tv_nsec);
3257 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
3258 p = xdr_reserve_space(xdr, 12);
3261 p = encode_time_delta(p, d_inode(dentry));
3263 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
3264 p = xdr_reserve_space(xdr, 12);
3267 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
3268 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
3270 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
3271 p = xdr_reserve_space(xdr, 12);
3274 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
3275 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
3277 if (bmval1 & FATTR4_WORD1_TIME_CREATE) {
3278 p = xdr_reserve_space(xdr, 12);
3281 p = xdr_encode_hyper(p, (s64)stat.btime.tv_sec);
3282 *p++ = cpu_to_be32(stat.btime.tv_nsec);
3284 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
3285 struct kstat parent_stat;
3288 p = xdr_reserve_space(xdr, 8);
3292 * Get parent's attributes if not ignoring crossmount
3293 * and this is the root of a cross-mounted filesystem.
3295 if (ignore_crossmnt == 0 &&
3296 dentry == exp->ex_path.mnt->mnt_root) {
3297 err = get_parent_attributes(exp, &parent_stat);
3300 ino = parent_stat.ino;
3302 p = xdr_encode_hyper(p, ino);
3304 #ifdef CONFIG_NFSD_PNFS
3305 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
3306 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3311 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
3312 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3317 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3318 p = xdr_reserve_space(xdr, 4);
3321 *p++ = cpu_to_be32(stat.blksize);
3323 #endif /* CONFIG_NFSD_PNFS */
3324 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
3327 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3328 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3329 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3330 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3332 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
3337 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3338 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3339 status = nfsd4_encode_security_label(xdr, rqstp, context,
3346 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3347 p = xdr_reserve_space(xdr, 4);
3350 err = xattr_supported_namespace(d_inode(dentry),
3352 *p++ = cpu_to_be32(err == 0);
3355 *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT);
3359 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3361 security_release_secctx(context, contextlen);
3362 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
3369 xdr_truncate_encode(xdr, starting_len);
3372 status = nfserrno(err);
3375 status = nfserr_resource;
3379 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3380 struct xdr_buf *buf, __be32 *p, int bytes)
3382 xdr->scratch.iov_len = 0;
3383 memset(buf, 0, sizeof(struct xdr_buf));
3384 buf->head[0].iov_base = p;
3385 buf->head[0].iov_len = 0;
3388 xdr->iov = buf->head;
3390 xdr->end = (void *)p + bytes;
3391 buf->buflen = bytes;
3394 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3395 struct svc_fh *fhp, struct svc_export *exp,
3396 struct dentry *dentry, u32 *bmval,
3397 struct svc_rqst *rqstp, int ignore_crossmnt)
3399 struct xdr_buf dummy;
3400 struct xdr_stream xdr;
3403 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
3404 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3410 static inline int attributes_need_mount(u32 *bmval)
3412 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3414 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3420 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3421 const char *name, int namlen)
3423 struct svc_export *exp = cd->rd_fhp->fh_export;
3424 struct dentry *dentry;
3426 int ignore_crossmnt = 0;
3428 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
3430 return nfserrno(PTR_ERR(dentry));
3434 * In the case of a mountpoint, the client may be asking for
3435 * attributes that are only properties of the underlying filesystem
3436 * as opposed to the cross-mounted file system. In such a case,
3437 * we will not follow the cross mount and will fill the attribtutes
3438 * directly from the mountpoint dentry.
3440 if (nfsd_mountpoint(dentry, exp)) {
3443 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3444 && !attributes_need_mount(cd->rd_bmval)) {
3445 ignore_crossmnt = 1;
3449 * Why the heck aren't we just using nfsd_lookup??
3450 * Different "."/".." handling? Something else?
3451 * At least, add a comment here to explain....
3453 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3455 nfserr = nfserrno(err);
3458 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3464 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
3465 cd->rd_rqstp, ignore_crossmnt);
3473 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3477 p = xdr_reserve_space(xdr, 20);
3481 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3482 *p++ = htonl(0); /* bmval1 */
3484 *p++ = htonl(4); /* attribute length */
3485 *p++ = nfserr; /* no htonl */
3490 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3491 loff_t offset, u64 ino, unsigned int d_type)
3493 struct readdir_cd *ccd = ccdv;
3494 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3495 struct xdr_stream *xdr = cd->xdr;
3496 int start_offset = xdr->buf->len;
3498 u32 name_and_cookie;
3500 __be32 nfserr = nfserr_toosmall;
3504 /* In nfsv4, "." and ".." never make it onto the wire.. */
3505 if (name && isdotent(name, namlen)) {
3506 cd->common.err = nfs_ok;
3510 if (cd->cookie_offset) {
3511 wire_offset = cpu_to_be64(offset);
3512 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3516 p = xdr_reserve_space(xdr, 4);
3519 *p++ = xdr_one; /* mark entry present */
3520 cookie_offset = xdr->buf->len;
3521 p = xdr_reserve_space(xdr, 3*4 + namlen);
3524 p = xdr_encode_hyper(p, OFFSET_MAX); /* offset of next entry */
3525 p = xdr_encode_array(p, name, namlen); /* name length & name */
3527 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3531 case nfserr_resource:
3532 nfserr = nfserr_toosmall;
3535 xdr_truncate_encode(xdr, start_offset);
3539 * If the client requested the RDATTR_ERROR attribute,
3540 * we stuff the error code into this attribute
3541 * and continue. If this attribute was not requested,
3542 * then in accordance with the spec, we fail the
3543 * entire READDIR operation(!)
3545 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3547 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3549 nfserr = nfserr_toosmall;
3553 nfserr = nfserr_toosmall;
3554 entry_bytes = xdr->buf->len - start_offset;
3555 if (entry_bytes > cd->rd_maxcount)
3557 cd->rd_maxcount -= entry_bytes;
3559 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3560 * notes that it could be zero. If it is zero, then the server
3561 * should enforce only the rd_maxcount value.
3563 if (cd->rd_dircount) {
3564 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3565 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3567 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3568 if (!cd->rd_dircount)
3569 cd->rd_maxcount = 0;
3572 cd->cookie_offset = cookie_offset;
3574 cd->common.err = nfs_ok;
3577 xdr_truncate_encode(xdr, start_offset);
3578 cd->common.err = nfserr;
3583 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3587 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3589 return nfserr_resource;
3590 *p++ = cpu_to_be32(sid->si_generation);
3591 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3592 sizeof(stateid_opaque_t));
3597 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3599 struct xdr_stream *xdr = resp->xdr;
3602 p = xdr_reserve_space(xdr, 8);
3604 return nfserr_resource;
3605 *p++ = cpu_to_be32(access->ac_supported);
3606 *p++ = cpu_to_be32(access->ac_resp_access);
3610 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3612 struct xdr_stream *xdr = resp->xdr;
3615 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3617 return nfserr_resource;
3618 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3619 NFS4_MAX_SESSIONID_LEN);
3620 *p++ = cpu_to_be32(bcts->dir);
3621 /* Upshifting from TCP to RDMA is not supported */
3622 *p++ = cpu_to_be32(0);
3627 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3629 struct xdr_stream *xdr = resp->xdr;
3631 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
3636 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3638 struct xdr_stream *xdr = resp->xdr;
3641 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3643 return nfserr_resource;
3644 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3645 NFS4_VERIFIER_SIZE);
3650 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3652 struct xdr_stream *xdr = resp->xdr;
3655 p = xdr_reserve_space(xdr, 20);
3657 return nfserr_resource;
3658 encode_cinfo(p, &create->cr_cinfo);
3659 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3660 create->cr_bmval[1], create->cr_bmval[2]);
3664 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3666 struct svc_fh *fhp = getattr->ga_fhp;
3667 struct xdr_stream *xdr = resp->xdr;
3669 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3670 getattr->ga_bmval, resp->rqstp, 0);
3674 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3676 struct xdr_stream *xdr = resp->xdr;
3677 struct svc_fh *fhp = *fhpp;
3681 len = fhp->fh_handle.fh_size;
3682 p = xdr_reserve_space(xdr, len + 4);
3684 return nfserr_resource;
3685 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw, len);
3690 * Including all fields other than the name, a LOCK4denied structure requires
3691 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3694 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3696 struct xdr_netobj *conf = &ld->ld_owner;
3700 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3703 * Don't fail to return the result just because we can't
3704 * return the conflicting open:
3712 return nfserr_resource;
3714 p = xdr_encode_hyper(p, ld->ld_start);
3715 p = xdr_encode_hyper(p, ld->ld_length);
3716 *p++ = cpu_to_be32(ld->ld_type);
3718 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3719 p = xdr_encode_opaque(p, conf->data, conf->len);
3721 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3722 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3723 *p++ = cpu_to_be32(0); /* length of owner name */
3725 return nfserr_denied;
3729 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3731 struct xdr_stream *xdr = resp->xdr;
3734 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3735 else if (nfserr == nfserr_denied)
3736 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3742 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3744 struct xdr_stream *xdr = resp->xdr;
3746 if (nfserr == nfserr_denied)
3747 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3752 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3754 struct xdr_stream *xdr = resp->xdr;
3756 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3761 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3763 struct xdr_stream *xdr = resp->xdr;
3766 p = xdr_reserve_space(xdr, 20);
3768 return nfserr_resource;
3769 p = encode_cinfo(p, &link->li_cinfo);
3775 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3777 struct xdr_stream *xdr = resp->xdr;
3780 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3783 p = xdr_reserve_space(xdr, 24);
3785 return nfserr_resource;
3786 p = encode_cinfo(p, &open->op_cinfo);
3787 *p++ = cpu_to_be32(open->op_rflags);
3789 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3794 p = xdr_reserve_space(xdr, 4);
3796 return nfserr_resource;
3798 *p++ = cpu_to_be32(open->op_delegate_type);
3799 switch (open->op_delegate_type) {
3800 case NFS4_OPEN_DELEGATE_NONE:
3802 case NFS4_OPEN_DELEGATE_READ:
3803 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3806 p = xdr_reserve_space(xdr, 20);
3808 return nfserr_resource;
3809 *p++ = cpu_to_be32(open->op_recall);
3812 * TODO: ACE's in delegations
3814 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3815 *p++ = cpu_to_be32(0);
3816 *p++ = cpu_to_be32(0);
3817 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3819 case NFS4_OPEN_DELEGATE_WRITE:
3820 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3823 p = xdr_reserve_space(xdr, 32);
3825 return nfserr_resource;
3826 *p++ = cpu_to_be32(0);
3829 * TODO: space_limit's in delegations
3831 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3832 *p++ = cpu_to_be32(~(u32)0);
3833 *p++ = cpu_to_be32(~(u32)0);
3836 * TODO: ACE's in delegations
3838 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3839 *p++ = cpu_to_be32(0);
3840 *p++ = cpu_to_be32(0);
3841 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3843 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3844 switch (open->op_why_no_deleg) {
3845 case WND4_CONTENTION:
3847 p = xdr_reserve_space(xdr, 8);
3849 return nfserr_resource;
3850 *p++ = cpu_to_be32(open->op_why_no_deleg);
3851 /* deleg signaling not supported yet: */
3852 *p++ = cpu_to_be32(0);
3855 p = xdr_reserve_space(xdr, 4);
3857 return nfserr_resource;
3858 *p++ = cpu_to_be32(open->op_why_no_deleg);
3864 /* XXX save filehandle here */
3869 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3871 struct xdr_stream *xdr = resp->xdr;
3873 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3877 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3879 struct xdr_stream *xdr = resp->xdr;
3881 return nfsd4_encode_stateid(xdr, &od->od_stateid);
3884 static __be32 nfsd4_encode_splice_read(
3885 struct nfsd4_compoundres *resp,
3886 struct nfsd4_read *read,
3887 struct file *file, unsigned long maxcount)
3889 struct xdr_stream *xdr = resp->xdr;
3890 struct xdr_buf *buf = xdr->buf;
3891 int status, space_left;
3894 /* Make sure there will be room for padding if needed */
3895 if (xdr->end - xdr->p < 1)
3896 return nfserr_resource;
3898 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3899 file, read->rd_offset, &maxcount,
3901 read->rd_length = maxcount;
3904 status = svc_encode_result_payload(read->rd_rqstp,
3905 buf->head[0].iov_len, maxcount);
3907 nfserr = nfserrno(status);
3911 buf->page_len = maxcount;
3912 buf->len += maxcount;
3913 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3916 /* Use rest of head for padding and remaining ops: */
3917 buf->tail[0].iov_base = xdr->p;
3918 buf->tail[0].iov_len = 0;
3919 xdr->iov = buf->tail;
3921 int pad = 4 - (maxcount&3);
3925 buf->tail[0].iov_base += maxcount&3;
3926 buf->tail[0].iov_len = pad;
3930 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3931 buf->buflen - buf->len);
3932 buf->buflen = buf->len + space_left;
3933 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3939 * nfsd_splice_actor may have already messed with the
3940 * page length; reset it so as not to confuse
3941 * xdr_truncate_encode in our caller.
3947 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3948 struct nfsd4_read *read,
3949 struct file *file, unsigned long maxcount)
3951 struct xdr_stream *xdr = resp->xdr;
3952 unsigned int starting_len = xdr->buf->len;
3953 __be32 zero = xdr_zero;
3956 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
3957 if (read->rd_vlen < 0)
3958 return nfserr_resource;
3960 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3961 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3963 read->rd_length = maxcount;
3966 if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount))
3968 xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount));
3970 write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &zero,
3971 xdr_pad_size(maxcount));
3976 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3977 struct nfsd4_read *read)
3979 bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
3980 unsigned long maxcount;
3981 struct xdr_stream *xdr = resp->xdr;
3983 int starting_len = xdr->buf->len;
3988 file = read->rd_nf->nf_file;
3990 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3992 WARN_ON_ONCE(splice_ok);
3993 return nfserr_resource;
3995 if (resp->xdr->buf->page_len && splice_ok) {
3997 return nfserr_resource;
3999 xdr_commit_encode(xdr);
4001 maxcount = min_t(unsigned long, read->rd_length,
4002 (xdr->buf->buflen - xdr->buf->len));
4004 if (file->f_op->splice_read && splice_ok)
4005 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
4007 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
4009 xdr_truncate_encode(xdr, starting_len);
4013 p = xdr_encode_bool(p, read->rd_eof);
4014 *p = cpu_to_be32(read->rd_length);
4019 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
4021 __be32 *p, *maxcount_p, zero = xdr_zero;
4022 struct xdr_stream *xdr = resp->xdr;
4023 int length_offset = xdr->buf->len;
4024 int maxcount, status;
4026 maxcount_p = xdr_reserve_space(xdr, XDR_UNIT);
4028 return nfserr_resource;
4029 maxcount = PAGE_SIZE;
4031 p = xdr_reserve_space(xdr, maxcount);
4033 return nfserr_resource;
4035 * XXX: By default, vfs_readlink() will truncate symlinks if they
4036 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4037 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4038 * that truncation occurred, and return NFS4ERR_RESOURCE.
4040 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4041 (char *)p, &maxcount);
4042 if (nfserr == nfserr_isdir)
4043 nfserr = nfserr_inval;
4046 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4049 nfserr = nfserrno(status);
4052 *maxcount_p = cpu_to_be32(maxcount);
4053 xdr_truncate_encode(xdr, length_offset + 4 + xdr_align_size(maxcount));
4054 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero,
4055 xdr_pad_size(maxcount));
4059 xdr_truncate_encode(xdr, length_offset);
4064 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
4070 struct xdr_stream *xdr = resp->xdr;
4071 int starting_len = xdr->buf->len;
4074 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
4076 return nfserr_resource;
4078 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
4079 *p++ = cpu_to_be32(0);
4080 *p++ = cpu_to_be32(0);
4081 xdr->buf->head[0].iov_len = (char *)xdr->p -
4082 (char *)xdr->buf->head[0].iov_base;
4085 * Number of bytes left for directory entries allowing for the
4086 * final 8 bytes of the readdir and a following failed op:
4088 bytes_left = xdr->buf->buflen - xdr->buf->len
4089 - COMPOUND_ERR_SLACK_SPACE - 8;
4090 if (bytes_left < 0) {
4091 nfserr = nfserr_resource;
4094 maxcount = svc_max_payload(resp->rqstp);
4095 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
4097 * Note the rfc defines rd_maxcount as the size of the
4098 * READDIR4resok structure, which includes the verifier above
4099 * and the 8 bytes encoded at the end of this function:
4101 if (maxcount < 16) {
4102 nfserr = nfserr_toosmall;
4105 maxcount = min_t(int, maxcount-16, bytes_left);
4107 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
4108 if (!readdir->rd_dircount)
4109 readdir->rd_dircount = svc_max_payload(resp->rqstp);
4112 readdir->rd_maxcount = maxcount;
4113 readdir->common.err = 0;
4114 readdir->cookie_offset = 0;
4116 offset = readdir->rd_cookie;
4117 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4119 &readdir->common, nfsd4_encode_dirent);
4120 if (nfserr == nfs_ok &&
4121 readdir->common.err == nfserr_toosmall &&
4122 xdr->buf->len == starting_len + 8) {
4123 /* nothing encoded; which limit did we hit?: */
4124 if (maxcount - 16 < bytes_left)
4125 /* It was the fault of rd_maxcount: */
4126 nfserr = nfserr_toosmall;
4128 /* We ran out of buffer space: */
4129 nfserr = nfserr_resource;
4134 if (readdir->cookie_offset) {
4135 wire_offset = cpu_to_be64(offset);
4136 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4140 p = xdr_reserve_space(xdr, 8);
4145 *p++ = 0; /* no more entries */
4146 *p++ = htonl(readdir->common.err == nfserr_eof);
4150 xdr_truncate_encode(xdr, starting_len);
4155 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
4157 struct xdr_stream *xdr = resp->xdr;
4160 p = xdr_reserve_space(xdr, 20);
4162 return nfserr_resource;
4163 p = encode_cinfo(p, &remove->rm_cinfo);
4168 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
4170 struct xdr_stream *xdr = resp->xdr;
4173 p = xdr_reserve_space(xdr, 40);
4175 return nfserr_resource;
4176 p = encode_cinfo(p, &rename->rn_sinfo);
4177 p = encode_cinfo(p, &rename->rn_tinfo);
4182 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
4184 u32 i, nflavs, supported;
4185 struct exp_flavor_info *flavs;
4186 struct exp_flavor_info def_flavs[2];
4187 __be32 *p, *flavorsp;
4188 static bool report = true;
4190 if (exp->ex_nflavors) {
4191 flavs = exp->ex_flavors;
4192 nflavs = exp->ex_nflavors;
4193 } else { /* Handling of some defaults in absence of real secinfo: */
4195 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4197 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4198 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4199 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4201 flavs[0].pseudoflavor
4202 = svcauth_gss_flavor(exp->ex_client);
4205 flavs[0].pseudoflavor
4206 = exp->ex_client->flavour->flavour;
4211 p = xdr_reserve_space(xdr, 4);
4213 return nfserr_resource;
4214 flavorsp = p++; /* to be backfilled later */
4216 for (i = 0; i < nflavs; i++) {
4217 rpc_authflavor_t pf = flavs[i].pseudoflavor;
4218 struct rpcsec_gss_info info;
4220 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4222 p = xdr_reserve_space(xdr, 4 + 4 +
4223 XDR_LEN(info.oid.len) + 4 + 4);
4225 return nfserr_resource;
4226 *p++ = cpu_to_be32(RPC_AUTH_GSS);
4227 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
4228 *p++ = cpu_to_be32(info.qop);
4229 *p++ = cpu_to_be32(info.service);
4230 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4232 p = xdr_reserve_space(xdr, 4);
4234 return nfserr_resource;
4235 *p++ = cpu_to_be32(pf);
4238 pr_warn("NFS: SECINFO: security flavor %u "
4239 "is not supported\n", pf);
4243 if (nflavs != supported)
4245 *flavorsp = htonl(supported);
4250 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4251 struct nfsd4_secinfo *secinfo)
4253 struct xdr_stream *xdr = resp->xdr;
4255 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
4259 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4260 struct nfsd4_secinfo_no_name *secinfo)
4262 struct xdr_stream *xdr = resp->xdr;
4264 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
4268 * The SETATTR encode routine is special -- it always encodes a bitmap,
4269 * regardless of the error status.
4272 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
4274 struct xdr_stream *xdr = resp->xdr;
4277 p = xdr_reserve_space(xdr, 16);
4279 return nfserr_resource;
4281 *p++ = cpu_to_be32(3);
4282 *p++ = cpu_to_be32(0);
4283 *p++ = cpu_to_be32(0);
4284 *p++ = cpu_to_be32(0);
4287 *p++ = cpu_to_be32(3);
4288 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4289 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4290 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
4296 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
4298 struct xdr_stream *xdr = resp->xdr;
4302 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4304 return nfserr_resource;
4305 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4306 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4307 NFS4_VERIFIER_SIZE);
4309 else if (nfserr == nfserr_clid_inuse) {
4310 p = xdr_reserve_space(xdr, 8);
4312 return nfserr_resource;
4313 *p++ = cpu_to_be32(0);
4314 *p++ = cpu_to_be32(0);
4320 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
4322 struct xdr_stream *xdr = resp->xdr;
4325 p = xdr_reserve_space(xdr, 16);
4327 return nfserr_resource;
4328 *p++ = cpu_to_be32(write->wr_bytes_written);
4329 *p++ = cpu_to_be32(write->wr_how_written);
4330 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4331 NFS4_VERIFIER_SIZE);
4336 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
4337 struct nfsd4_exchange_id *exid)
4339 struct xdr_stream *xdr = resp->xdr;
4344 int server_scope_sz;
4345 uint64_t minor_id = 0;
4346 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
4348 major_id = nn->nfsd_name;
4349 major_id_sz = strlen(nn->nfsd_name);
4350 server_scope = nn->nfsd_name;
4351 server_scope_sz = strlen(nn->nfsd_name);
4353 p = xdr_reserve_space(xdr,
4354 8 /* eir_clientid */ +
4355 4 /* eir_sequenceid */ +
4359 return nfserr_resource;
4361 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
4362 *p++ = cpu_to_be32(exid->seqid);
4363 *p++ = cpu_to_be32(exid->flags);
4365 *p++ = cpu_to_be32(exid->spa_how);
4367 switch (exid->spa_how) {
4371 /* spo_must_enforce bitmap: */
4372 nfserr = nfsd4_encode_bitmap(xdr,
4373 exid->spo_must_enforce[0],
4374 exid->spo_must_enforce[1],
4375 exid->spo_must_enforce[2]);
4378 /* spo_must_allow bitmap: */
4379 nfserr = nfsd4_encode_bitmap(xdr,
4380 exid->spo_must_allow[0],
4381 exid->spo_must_allow[1],
4382 exid->spo_must_allow[2]);
4390 p = xdr_reserve_space(xdr,
4391 8 /* so_minor_id */ +
4392 4 /* so_major_id.len */ +
4393 (XDR_QUADLEN(major_id_sz) * 4) +
4394 4 /* eir_server_scope.len */ +
4395 (XDR_QUADLEN(server_scope_sz) * 4) +
4396 4 /* eir_server_impl_id.count (0) */);
4398 return nfserr_resource;
4400 /* The server_owner struct */
4401 p = xdr_encode_hyper(p, minor_id); /* Minor id */
4403 p = xdr_encode_opaque(p, major_id, major_id_sz);
4406 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
4408 /* Implementation id */
4409 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
4414 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4415 struct nfsd4_create_session *sess)
4417 struct xdr_stream *xdr = resp->xdr;
4420 p = xdr_reserve_space(xdr, 24);
4422 return nfserr_resource;
4423 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4424 NFS4_MAX_SESSIONID_LEN);
4425 *p++ = cpu_to_be32(sess->seqid);
4426 *p++ = cpu_to_be32(sess->flags);
4428 p = xdr_reserve_space(xdr, 28);
4430 return nfserr_resource;
4431 *p++ = cpu_to_be32(0); /* headerpadsz */
4432 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4433 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4434 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4435 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4436 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4437 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4439 if (sess->fore_channel.nr_rdma_attrs) {
4440 p = xdr_reserve_space(xdr, 4);
4442 return nfserr_resource;
4443 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4446 p = xdr_reserve_space(xdr, 28);
4448 return nfserr_resource;
4449 *p++ = cpu_to_be32(0); /* headerpadsz */
4450 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4451 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4452 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4453 *p++ = cpu_to_be32(sess->back_channel.maxops);
4454 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4455 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4457 if (sess->back_channel.nr_rdma_attrs) {
4458 p = xdr_reserve_space(xdr, 4);
4460 return nfserr_resource;
4461 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4467 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4468 struct nfsd4_sequence *seq)
4470 struct xdr_stream *xdr = resp->xdr;
4473 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4475 return nfserr_resource;
4476 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4477 NFS4_MAX_SESSIONID_LEN);
4478 *p++ = cpu_to_be32(seq->seqid);
4479 *p++ = cpu_to_be32(seq->slotid);
4480 /* Note slotid's are numbered from zero: */
4481 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4482 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4483 *p++ = cpu_to_be32(seq->status_flags);
4485 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4490 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4491 struct nfsd4_test_stateid *test_stateid)
4493 struct xdr_stream *xdr = resp->xdr;
4494 struct nfsd4_test_stateid_id *stateid, *next;
4497 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4499 return nfserr_resource;
4500 *p++ = htonl(test_stateid->ts_num_ids);
4502 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4503 *p++ = stateid->ts_id_status;
4509 #ifdef CONFIG_NFSD_PNFS
4511 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4512 struct nfsd4_getdeviceinfo *gdev)
4514 struct xdr_stream *xdr = resp->xdr;
4515 const struct nfsd4_layout_ops *ops;
4516 u32 starting_len = xdr->buf->len, needed_len;
4519 p = xdr_reserve_space(xdr, 4);
4521 return nfserr_resource;
4523 *p++ = cpu_to_be32(gdev->gd_layout_type);
4525 /* If maxcount is 0 then just update notifications */
4526 if (gdev->gd_maxcount != 0) {
4527 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4528 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4531 * We don't bother to burden the layout drivers with
4532 * enforcing gd_maxcount, just tell the client to
4533 * come back with a bigger buffer if it's not enough.
4535 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4541 if (gdev->gd_notify_types) {
4542 p = xdr_reserve_space(xdr, 4 + 4);
4544 return nfserr_resource;
4545 *p++ = cpu_to_be32(1); /* bitmap length */
4546 *p++ = cpu_to_be32(gdev->gd_notify_types);
4548 p = xdr_reserve_space(xdr, 4);
4550 return nfserr_resource;
4556 dprintk("%s: maxcount too small\n", __func__);
4557 needed_len = xdr->buf->len + 4 /* notifications */;
4558 xdr_truncate_encode(xdr, starting_len);
4559 p = xdr_reserve_space(xdr, 4);
4561 return nfserr_resource;
4562 *p++ = cpu_to_be32(needed_len);
4563 return nfserr_toosmall;
4567 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4568 struct nfsd4_layoutget *lgp)
4570 struct xdr_stream *xdr = resp->xdr;
4571 const struct nfsd4_layout_ops *ops;
4574 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4576 return nfserr_resource;
4578 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4579 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4580 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4581 sizeof(stateid_opaque_t));
4583 *p++ = cpu_to_be32(1); /* we always return a single layout */
4584 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4585 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4586 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4587 *p++ = cpu_to_be32(lgp->lg_layout_type);
4589 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4590 return ops->encode_layoutget(xdr, lgp);
4594 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4595 struct nfsd4_layoutcommit *lcp)
4597 struct xdr_stream *xdr = resp->xdr;
4600 p = xdr_reserve_space(xdr, 4);
4602 return nfserr_resource;
4603 *p++ = cpu_to_be32(lcp->lc_size_chg);
4604 if (lcp->lc_size_chg) {
4605 p = xdr_reserve_space(xdr, 8);
4607 return nfserr_resource;
4608 p = xdr_encode_hyper(p, lcp->lc_newsize);
4615 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4616 struct nfsd4_layoutreturn *lrp)
4618 struct xdr_stream *xdr = resp->xdr;
4621 p = xdr_reserve_space(xdr, 4);
4623 return nfserr_resource;
4624 *p++ = cpu_to_be32(lrp->lrs_present);
4625 if (lrp->lrs_present)
4626 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4629 #endif /* CONFIG_NFSD_PNFS */
4632 nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4633 struct nfsd42_write_res *write, bool sync)
4636 p = xdr_reserve_space(resp->xdr, 4);
4638 return nfserr_resource;
4641 *p++ = cpu_to_be32(0);
4644 *p++ = cpu_to_be32(1);
4645 nfserr = nfsd4_encode_stateid(resp->xdr, &write->cb_stateid);
4649 p = xdr_reserve_space(resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
4651 return nfserr_resource;
4653 p = xdr_encode_hyper(p, write->wr_bytes_written);
4654 *p++ = cpu_to_be32(write->wr_stable_how);
4655 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4656 NFS4_VERIFIER_SIZE);
4661 nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4663 struct xdr_stream *xdr = resp->xdr;
4664 struct nfs42_netaddr *addr;
4667 p = xdr_reserve_space(xdr, 4);
4668 *p++ = cpu_to_be32(ns->nl4_type);
4670 switch (ns->nl4_type) {
4672 addr = &ns->u.nl4_addr;
4674 /* netid_len, netid, uaddr_len, uaddr (port included
4675 * in RPCBIND_MAXUADDRLEN)
4677 p = xdr_reserve_space(xdr,
4679 (XDR_QUADLEN(addr->netid_len) * 4) +
4681 (XDR_QUADLEN(addr->addr_len) * 4));
4683 return nfserr_resource;
4685 *p++ = cpu_to_be32(addr->netid_len);
4686 p = xdr_encode_opaque_fixed(p, addr->netid,
4688 *p++ = cpu_to_be32(addr->addr_len);
4689 p = xdr_encode_opaque_fixed(p, addr->addr,
4693 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4694 return nfserr_inval;
4701 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4702 struct nfsd4_copy *copy)
4706 nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
4707 nfsd4_copy_is_sync(copy));
4711 p = xdr_reserve_space(resp->xdr, 4 + 4);
4712 *p++ = xdr_one; /* cr_consecutive */
4713 *p = nfsd4_copy_is_sync(copy) ? xdr_one : xdr_zero;
4718 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4719 struct nfsd4_offload_status *os)
4721 struct xdr_stream *xdr = resp->xdr;
4724 p = xdr_reserve_space(xdr, 8 + 4);
4726 return nfserr_resource;
4727 p = xdr_encode_hyper(p, os->count);
4728 *p++ = cpu_to_be32(0);
4733 nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4734 struct nfsd4_read *read,
4735 unsigned long *maxcount, u32 *eof,
4738 struct xdr_stream *xdr = resp->xdr;
4739 struct file *file = read->rd_nf->nf_file;
4740 int starting_len = xdr->buf->len;
4746 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4747 if (hole_pos > read->rd_offset)
4748 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4749 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
4751 /* Content type, offset, byte count */
4752 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4754 return nfserr_resource;
4756 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
4757 if (read->rd_vlen < 0)
4758 return nfserr_resource;
4760 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
4761 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
4764 xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
4766 tmp = htonl(NFS4_CONTENT_DATA);
4767 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4768 tmp64 = cpu_to_be64(read->rd_offset);
4769 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
4770 tmp = htonl(*maxcount);
4771 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
4774 write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
4775 xdr_pad_size(*maxcount));
4780 nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4781 struct nfsd4_read *read,
4782 unsigned long *maxcount, u32 *eof)
4784 struct file *file = read->rd_nf->nf_file;
4785 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
4786 loff_t f_size = i_size_read(file_inode(file));
4787 unsigned long count;
4790 if (data_pos == -ENXIO)
4792 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4793 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
4794 count = data_pos - read->rd_offset;
4796 /* Content type, offset, byte count */
4797 p = xdr_reserve_space(resp->xdr, 4 + 8 + 8);
4799 return nfserr_resource;
4801 *p++ = htonl(NFS4_CONTENT_HOLE);
4802 p = xdr_encode_hyper(p, read->rd_offset);
4803 p = xdr_encode_hyper(p, count);
4805 *eof = (read->rd_offset + count) >= f_size;
4806 *maxcount = min_t(unsigned long, count, *maxcount);
4811 nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4812 struct nfsd4_read *read)
4814 unsigned long maxcount, count;
4815 struct xdr_stream *xdr = resp->xdr;
4817 int starting_len = xdr->buf->len;
4818 int last_segment = xdr->buf->len;
4827 file = read->rd_nf->nf_file;
4829 /* eof flag, segment count */
4830 p = xdr_reserve_space(xdr, 4 + 4);
4832 return nfserr_resource;
4833 xdr_commit_encode(xdr);
4835 maxcount = min_t(unsigned long, read->rd_length,
4836 (xdr->buf->buflen - xdr->buf->len));
4839 eof = read->rd_offset >= i_size_read(file_inode(file));
4843 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4844 is_data = pos > read->rd_offset;
4846 while (count > 0 && !eof) {
4849 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4850 segments == 0 ? &pos : NULL);
4852 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
4856 read->rd_offset += maxcount;
4858 last_segment = xdr->buf->len;
4863 if (nfserr && segments == 0)
4864 xdr_truncate_encode(xdr, starting_len);
4867 xdr_truncate_encode(xdr, last_segment);
4872 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4873 tmp = htonl(segments);
4874 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
4881 nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4882 struct nfsd4_copy_notify *cn)
4884 struct xdr_stream *xdr = resp->xdr;
4891 p = xdr_reserve_space(xdr, 12);
4893 return nfserr_resource;
4895 /* cnr_lease_time */
4896 p = xdr_encode_hyper(p, cn->cpn_sec);
4897 *p++ = cpu_to_be32(cn->cpn_nsec);
4900 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4904 /* cnr_src.nl_nsvr */
4905 p = xdr_reserve_space(xdr, 4);
4907 return nfserr_resource;
4909 *p++ = cpu_to_be32(1);
4911 nfserr = nfsd42_encode_nl4_server(resp, cn->cpn_src);
4916 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4917 struct nfsd4_seek *seek)
4921 p = xdr_reserve_space(resp->xdr, 4 + 8);
4922 *p++ = cpu_to_be32(seek->seek_eof);
4923 p = xdr_encode_hyper(p, seek->seek_pos);
4929 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4935 * Encode kmalloc-ed buffer in to XDR stream.
4938 nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4943 cplen = min_t(unsigned long, buflen,
4944 ((void *)xdr->end - (void *)xdr->p));
4945 p = xdr_reserve_space(xdr, cplen);
4947 return nfserr_resource;
4949 memcpy(p, buf, cplen);
4954 cplen = min_t(u32, buflen, PAGE_SIZE);
4955 p = xdr_reserve_space(xdr, cplen);
4957 return nfserr_resource;
4959 memcpy(p, buf, cplen);
4961 if (cplen < PAGE_SIZE) {
4963 * We're done, with a length that wasn't page
4964 * aligned, so possibly not word aligned. Pad
4965 * any trailing bytes with 0.
4967 xdr_encode_opaque_fixed(p, NULL, cplen);
4971 buflen -= PAGE_SIZE;
4979 nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4980 struct nfsd4_getxattr *getxattr)
4982 struct xdr_stream *xdr = resp->xdr;
4985 p = xdr_reserve_space(xdr, 4);
4987 return nfserr_resource;
4989 *p = cpu_to_be32(getxattr->getxa_len);
4991 if (getxattr->getxa_len == 0)
4994 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
4995 getxattr->getxa_len);
4997 kvfree(getxattr->getxa_buf);
5003 nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5004 struct nfsd4_setxattr *setxattr)
5006 struct xdr_stream *xdr = resp->xdr;
5009 p = xdr_reserve_space(xdr, 20);
5011 return nfserr_resource;
5013 encode_cinfo(p, &setxattr->setxa_cinfo);
5019 * See if there are cookie values that can be rejected outright.
5022 nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5025 u64 cookie = listxattrs->lsxa_cookie;
5028 * If the cookie is larger than the maximum number we can fit
5029 * in either the buffer we just got back from vfs_listxattr, or,
5030 * XDR-encoded, in the return buffer, it's invalid.
5032 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5033 return nfserr_badcookie;
5035 if (cookie > (listxattrs->lsxa_maxcount /
5036 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5037 return nfserr_badcookie;
5039 *offsetp = (u32)cookie;
5044 nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5045 struct nfsd4_listxattrs *listxattrs)
5047 struct xdr_stream *xdr = resp->xdr;
5048 u32 cookie_offset, count_offset, eof;
5049 u32 left, xdrleft, slen, count;
5059 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5064 * Reserve space for the cookie and the name array count. Record
5065 * the offsets to save them later.
5067 cookie_offset = xdr->buf->len;
5068 count_offset = cookie_offset + 8;
5069 p = xdr_reserve_space(xdr, 12);
5071 status = nfserr_resource;
5076 left = listxattrs->lsxa_len;
5077 sp = listxattrs->lsxa_buf;
5080 xdrleft = listxattrs->lsxa_maxcount;
5082 while (left > 0 && xdrleft > 0) {
5086 * Check if this is a "user." attribute, skip it if not.
5088 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5091 slen -= XATTR_USER_PREFIX_LEN;
5092 xdrlen = 4 + ((slen + 3) & ~3);
5093 if (xdrlen > xdrleft) {
5096 * Can't even fit the first attribute name.
5098 status = nfserr_toosmall;
5105 left -= XATTR_USER_PREFIX_LEN;
5106 sp += XATTR_USER_PREFIX_LEN;
5107 if (nuser++ < offset)
5111 p = xdr_reserve_space(xdr, xdrlen);
5113 status = nfserr_resource;
5117 xdr_encode_opaque(p, sp, slen);
5127 * If there were user attributes to copy, but we didn't copy
5128 * any, the offset was too large (e.g. the cookie was invalid).
5130 if (nuser > 0 && count == 0) {
5131 status = nfserr_badcookie;
5136 p = xdr_reserve_space(xdr, 4);
5138 status = nfserr_resource;
5141 *p = cpu_to_be32(eof);
5143 cookie = offset + count;
5145 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
5146 tmp = cpu_to_be32(count);
5147 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
5149 if (listxattrs->lsxa_len)
5150 kvfree(listxattrs->lsxa_buf);
5155 nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5156 struct nfsd4_removexattr *removexattr)
5158 struct xdr_stream *xdr = resp->xdr;
5161 p = xdr_reserve_space(xdr, 20);
5163 return nfserr_resource;
5165 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5169 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5172 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5173 * since we don't need to filter out obsolete ops as this is
5174 * done in the decoding phase.
5176 static const nfsd4_enc nfsd4_enc_ops[] = {
5177 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5178 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5179 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5180 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5181 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5182 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5183 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5184 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5185 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5186 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5187 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5188 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5189 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5190 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5191 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5192 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
5193 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
5194 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5195 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5196 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5197 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5198 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5199 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5200 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5201 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5202 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5203 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5204 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5205 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5206 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5207 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5208 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5209 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5210 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5211 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5212 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5213 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
5215 /* NFSv4.1 operations */
5216 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
5217 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
5218 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5219 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
5220 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5221 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
5222 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5223 #ifdef CONFIG_NFSD_PNFS
5224 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5225 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5226 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5227 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5228 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5230 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5231 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5232 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5233 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5234 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5236 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
5237 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5238 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
5239 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
5240 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5241 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5242 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
5244 /* NFSv4.2 operations */
5245 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5246 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
5247 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
5248 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5249 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5250 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5251 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5252 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
5253 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
5254 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
5255 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
5256 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
5257 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
5259 /* RFC 8276 extended atributes operations */
5260 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5261 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5262 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5263 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
5267 * Calculate whether we still have space to encode repsize bytes.
5268 * There are two considerations:
5269 * - For NFS versions >=4.1, the size of the reply must stay within
5271 * - For all NFS versions, we must stay within limited preallocated
5274 * This is called before the operation is processed, so can only provide
5275 * an upper estimate. For some nonidempotent operations (such as
5276 * getattr), it's not necessarily a problem if that estimate is wrong,
5277 * as we can fail it after processing without significant side effects.
5279 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
5281 struct xdr_buf *buf = &resp->rqstp->rq_res;
5282 struct nfsd4_slot *slot = resp->cstate.slot;
5284 if (buf->len + respsize <= buf->buflen)
5286 if (!nfsd4_has_session(&resp->cstate))
5287 return nfserr_resource;
5288 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5290 return nfserr_rep_too_big_to_cache;
5292 return nfserr_rep_too_big;
5296 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5298 struct xdr_stream *xdr = resp->xdr;
5299 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5300 struct svc_rqst *rqstp = resp->rqstp;
5301 const struct nfsd4_operation *opdesc = op->opdesc;
5302 int post_err_offset;
5306 p = xdr_reserve_space(xdr, 8);
5311 *p++ = cpu_to_be32(op->opnum);
5312 post_err_offset = xdr->buf->len;
5314 if (op->opnum == OP_ILLEGAL)
5316 if (op->status && opdesc &&
5317 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5319 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
5320 !nfsd4_enc_ops[op->opnum]);
5321 encoder = nfsd4_enc_ops[op->opnum];
5322 op->status = encoder(resp, op->status, &op->u);
5324 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
5325 if (opdesc && opdesc->op_release)
5326 opdesc->op_release(&op->u);
5327 xdr_commit_encode(xdr);
5329 /* nfsd4_check_resp_size guarantees enough room for error status */
5331 int space_needed = 0;
5332 if (!nfsd4_last_compound_op(rqstp))
5333 space_needed = COMPOUND_ERR_SLACK_SPACE;
5334 op->status = nfsd4_check_resp_size(resp, space_needed);
5336 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5337 struct nfsd4_slot *slot = resp->cstate.slot;
5339 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5340 op->status = nfserr_rep_too_big_to_cache;
5342 op->status = nfserr_rep_too_big;
5344 if (op->status == nfserr_resource ||
5345 op->status == nfserr_rep_too_big ||
5346 op->status == nfserr_rep_too_big_to_cache) {
5348 * The operation may have already been encoded or
5349 * partially encoded. No op returns anything additional
5350 * in the case of one of these three errors, so we can
5351 * just truncate back to after the status. But it's a
5352 * bug if we had to do this on a non-idempotent op:
5354 warn_on_nonidempotent_op(op);
5355 xdr_truncate_encode(xdr, post_err_offset);
5358 int len = xdr->buf->len - post_err_offset;
5360 so->so_replay.rp_status = op->status;
5361 so->so_replay.rp_buflen = len;
5362 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5363 so->so_replay.rp_buf, len);
5370 * Encode the reply stored in the stateowner reply cache
5372 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5373 * previously sent already encoded operation.
5376 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
5379 struct nfs4_replay *rp = op->replay;
5381 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5386 *p++ = cpu_to_be32(op->opnum);
5387 *p++ = rp->rp_status; /* already xdr'ed */
5389 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
5392 void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
5394 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5396 if (args->ops != args->iops) {
5398 args->ops = args->iops;
5400 while (args->to_free) {
5401 struct svcxdr_tmpbuf *tb = args->to_free;
5402 args->to_free = tb->next;
5408 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
5410 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5412 /* svcxdr_tmp_alloc */
5413 args->to_free = NULL;
5416 args->ops = args->iops;
5417 args->rqstp = rqstp;
5419 return nfsd4_decode_compound(args);
5423 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
5425 struct nfsd4_compoundres *resp = rqstp->rq_resp;
5426 struct xdr_buf *buf = xdr->buf;
5429 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5430 buf->tail[0].iov_len);
5433 * Send buffer space for the following items is reserved
5434 * at the top of nfsd4_proc_compound().
5438 *p++ = resp->cstate.status;
5440 rqstp->rq_next_page = xdr->page_ptr + 1;
5442 *p++ = htonl(resp->taglen);
5443 memcpy(p, resp->tag, resp->taglen);
5444 p += XDR_QUADLEN(resp->taglen);
5445 *p++ = htonl(resp->opcnt);
5447 nfsd4_sequence_done(resp);