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_MODIFY_SET) {
476 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
477 return nfserr_bad_xdr;
479 case NFS4_SET_TO_CLIENT_TIME:
480 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
483 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
485 case NFS4_SET_TO_SERVER_TIME:
486 iattr->ia_valid |= ATTR_MTIME;
489 return nfserr_bad_xdr;
493 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
494 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
495 status = nfsd4_decode_security_label(argp, label);
499 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
503 return nfserr_bad_xdr;
504 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
505 return nfserr_bad_xdr;
506 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
507 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
508 return nfserr_bad_xdr;
509 *umask = mask & S_IRWXUGO;
510 iattr->ia_valid |= ATTR_MODE;
513 /* request sanity: did attrlist4 contain the expected number of words? */
514 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
515 return nfserr_bad_xdr;
521 nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
525 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
527 return nfserr_bad_xdr;
528 sid->si_generation = be32_to_cpup(p++);
529 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
534 nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
538 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
540 return nfserr_bad_xdr;
541 memcpy(clientid, p, sizeof(*clientid));
546 nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
547 clientid_t *clientid, struct xdr_netobj *owner)
551 status = nfsd4_decode_clientid4(argp, clientid);
554 return nfsd4_decode_opaque(argp, owner);
557 #ifdef CONFIG_NFSD_PNFS
559 nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
560 struct nfsd4_deviceid *devid)
564 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
566 return nfserr_bad_xdr;
567 memcpy(devid, p, sizeof(*devid));
572 nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
573 struct nfsd4_layoutcommit *lcp)
575 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
576 return nfserr_bad_xdr;
577 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
578 return nfserr_bad_xdr;
579 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
580 return nfserr_bad_xdr;
582 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
583 return nfserr_bad_xdr;
584 if (lcp->lc_up_len > 0) {
585 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
586 if (!lcp->lc_up_layout)
587 return nfserr_bad_xdr;
594 nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
595 struct nfsd4_layoutreturn *lrp)
599 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
600 return nfserr_bad_xdr;
601 switch (lrp->lr_return_type) {
603 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
604 return nfserr_bad_xdr;
605 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
606 return nfserr_bad_xdr;
607 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
610 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
611 return nfserr_bad_xdr;
612 if (lrp->lrf_body_len > 0) {
613 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
615 return nfserr_bad_xdr;
620 lrp->lr_seg.offset = 0;
621 lrp->lr_seg.length = NFS4_MAX_UINT64;
624 return nfserr_bad_xdr;
630 #endif /* CONFIG_NFSD_PNFS */
633 nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
634 struct nfs4_sessionid *sessionid)
638 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
640 return nfserr_bad_xdr;
641 memcpy(sessionid->data, p, sizeof(sessionid->data));
645 /* Defined in Appendix A of RFC 5531 */
647 nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
648 struct nfsd4_cb_sec *cbs)
650 u32 stamp, gidcount, uid, gid;
653 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
654 return nfserr_bad_xdr;
656 status = nfsd4_decode_ignored_string(argp, 255);
659 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
660 return nfserr_bad_xdr;
661 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
662 return nfserr_bad_xdr;
663 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
664 return nfserr_bad_xdr;
666 return nfserr_bad_xdr;
667 p = xdr_inline_decode(argp->xdr, gidcount << 2);
669 return nfserr_bad_xdr;
670 if (cbs->flavor == (u32)(-1)) {
671 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
673 kuid_t kuid = make_kuid(userns, uid);
674 kgid_t kgid = make_kgid(userns, gid);
675 if (uid_valid(kuid) && gid_valid(kgid)) {
678 cbs->flavor = RPC_AUTH_UNIX;
680 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
688 nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
689 struct nfsd4_cb_sec *cbs)
694 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
696 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
697 return nfserr_bad_xdr;
698 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
699 return nfserr_bad_xdr;
700 /* gcbp_handle_from_server */
701 status = nfsd4_decode_ignored_string(argp, 0);
704 /* gcbp_handle_from_client */
705 status = nfsd4_decode_ignored_string(argp, 0);
712 /* a counted array of callback_sec_parms4 items */
714 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
716 u32 i, secflavor, nr_secflavs;
719 /* callback_sec_params4 */
720 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
721 return nfserr_bad_xdr;
723 cbs->flavor = (u32)(-1);
725 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
728 for (i = 0; i < nr_secflavs; ++i) {
729 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
730 return nfserr_bad_xdr;
734 if (cbs->flavor == (u32)(-1))
735 cbs->flavor = RPC_AUTH_NULL;
738 status = nfsd4_decode_authsys_parms(argp, cbs);
743 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
757 * NFSv4 operation argument decoders
761 nfsd4_decode_access(struct nfsd4_compoundargs *argp,
762 struct nfsd4_access *access)
764 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
765 return nfserr_bad_xdr;
770 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
772 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
773 return nfserr_bad_xdr;
774 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
779 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
781 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
782 return nfserr_bad_xdr;
783 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
784 return nfserr_bad_xdr;
789 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
793 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
794 return nfserr_bad_xdr;
795 switch (create->cr_type) {
797 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
798 return nfserr_bad_xdr;
799 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
801 return nfserr_bad_xdr;
802 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
803 if (!create->cr_data)
804 return nfserr_jukebox;
808 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
809 return nfserr_bad_xdr;
810 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
811 return nfserr_bad_xdr;
819 status = nfsd4_decode_component4(argp, &create->cr_name,
820 &create->cr_namelen);
823 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
824 ARRAY_SIZE(create->cr_bmval),
825 &create->cr_iattr, &create->cr_acl,
826 &create->cr_label, &create->cr_umask);
834 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
836 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
840 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
842 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
843 ARRAY_SIZE(getattr->ga_bmval));
847 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
849 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
853 nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
854 struct nfsd4_lock *lock)
858 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
859 return nfserr_bad_xdr;
860 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
863 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
864 return nfserr_bad_xdr;
865 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
866 &lock->lk_new_owner);
870 nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
871 struct nfsd4_lock *lock)
875 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
878 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
879 return nfserr_bad_xdr;
885 nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
887 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
888 return nfserr_bad_xdr;
890 return nfsd4_decode_open_to_lock_owner4(argp, lock);
891 return nfsd4_decode_exist_lock_owner4(argp, lock);
895 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
897 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
898 return nfserr_bad_xdr;
899 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
900 return nfserr_bad_xdr;
901 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
902 return nfserr_bad_xdr;
903 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
904 return nfserr_bad_xdr;
905 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
906 return nfserr_bad_xdr;
907 return nfsd4_decode_locker4(argp, lock);
911 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
913 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
914 return nfserr_bad_xdr;
915 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
916 return nfserr_bad_xdr;
917 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
918 return nfserr_bad_xdr;
919 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
920 return nfserr_bad_xdr;
921 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
926 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
930 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
931 return nfserr_bad_xdr;
932 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
933 return nfserr_bad_xdr;
934 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
935 return nfserr_bad_xdr;
936 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
939 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
940 return nfserr_bad_xdr;
941 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
942 return nfserr_bad_xdr;
948 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
950 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
954 nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
958 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
959 return nfserr_bad_xdr;
960 switch (open->op_createmode) {
961 case NFS4_CREATE_UNCHECKED:
962 case NFS4_CREATE_GUARDED:
963 status = nfsd4_decode_fattr4(argp, open->op_bmval,
964 ARRAY_SIZE(open->op_bmval),
965 &open->op_iattr, &open->op_acl,
966 &open->op_label, &open->op_umask);
970 case NFS4_CREATE_EXCLUSIVE:
971 status = nfsd4_decode_verifier4(argp, &open->op_verf);
975 case NFS4_CREATE_EXCLUSIVE4_1:
976 if (argp->minorversion < 1)
977 return nfserr_bad_xdr;
978 status = nfsd4_decode_verifier4(argp, &open->op_verf);
981 status = nfsd4_decode_fattr4(argp, open->op_bmval,
982 ARRAY_SIZE(open->op_bmval),
983 &open->op_iattr, &open->op_acl,
984 &open->op_label, &open->op_umask);
989 return nfserr_bad_xdr;
996 nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1000 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1001 return nfserr_bad_xdr;
1002 switch (open->op_create) {
1003 case NFS4_OPEN_NOCREATE:
1005 case NFS4_OPEN_CREATE:
1006 status = nfsd4_decode_createhow4(argp, open);
1011 return nfserr_bad_xdr;
1017 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
1021 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1022 return nfserr_bad_xdr;
1023 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1024 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1026 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1028 switch (w & NFS4_SHARE_ACCESS_MASK) {
1029 case NFS4_SHARE_ACCESS_READ:
1030 case NFS4_SHARE_ACCESS_WRITE:
1031 case NFS4_SHARE_ACCESS_BOTH:
1034 return nfserr_bad_xdr;
1036 w &= ~NFS4_SHARE_ACCESS_MASK;
1039 if (!argp->minorversion)
1040 return nfserr_bad_xdr;
1041 switch (w & NFS4_SHARE_WANT_MASK) {
1042 case NFS4_SHARE_WANT_NO_PREFERENCE:
1043 case NFS4_SHARE_WANT_READ_DELEG:
1044 case NFS4_SHARE_WANT_WRITE_DELEG:
1045 case NFS4_SHARE_WANT_ANY_DELEG:
1046 case NFS4_SHARE_WANT_NO_DELEG:
1047 case NFS4_SHARE_WANT_CANCEL:
1050 return nfserr_bad_xdr;
1052 w &= ~NFS4_SHARE_WANT_MASK;
1056 if (!deleg_when) /* open_downgrade */
1057 return nfserr_inval;
1059 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1060 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
1061 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1062 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
1065 return nfserr_bad_xdr;
1068 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1070 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1071 return nfserr_bad_xdr;
1072 /* Note: unlike access bits, deny bits may be zero. */
1073 if (*x & ~NFS4_SHARE_DENY_BOTH)
1074 return nfserr_bad_xdr;
1080 nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1081 struct nfsd4_open *open)
1085 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1086 return nfserr_bad_xdr;
1087 switch (open->op_claim_type) {
1088 case NFS4_OPEN_CLAIM_NULL:
1089 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1090 status = nfsd4_decode_component4(argp, &open->op_fname,
1091 &open->op_fnamelen);
1095 case NFS4_OPEN_CLAIM_PREVIOUS:
1096 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1097 return nfserr_bad_xdr;
1099 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1100 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1103 status = nfsd4_decode_component4(argp, &open->op_fname,
1104 &open->op_fnamelen);
1108 case NFS4_OPEN_CLAIM_FH:
1109 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1110 if (argp->minorversion < 1)
1111 return nfserr_bad_xdr;
1114 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1115 if (argp->minorversion < 1)
1116 return nfserr_bad_xdr;
1117 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1122 return nfserr_bad_xdr;
1129 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1134 memset(open->op_bmval, 0, sizeof(open->op_bmval));
1135 open->op_iattr.ia_valid = 0;
1136 open->op_openowner = NULL;
1138 open->op_xdr_error = 0;
1139 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1140 return nfserr_bad_xdr;
1141 /* deleg_want is ignored */
1142 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1143 &open->op_deleg_want, &dummy);
1146 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1149 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1153 status = nfsd4_decode_openflag4(argp, open);
1156 return nfsd4_decode_open_claim4(argp, open);
1160 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1164 if (argp->minorversion >= 1)
1165 return nfserr_notsupp;
1167 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
1170 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1171 return nfserr_bad_xdr;
1177 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1181 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
1184 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1185 return nfserr_bad_xdr;
1186 /* deleg_want is ignored */
1187 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1188 &open_down->od_deleg_want, NULL);
1191 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1195 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1199 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1200 return nfserr_bad_xdr;
1201 if (putfh->pf_fhlen > NFS4_FHSIZE)
1202 return nfserr_bad_xdr;
1203 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1205 return nfserr_bad_xdr;
1206 putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
1207 if (!putfh->pf_fhval)
1208 return nfserr_jukebox;
1214 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1216 if (argp->minorversion == 0)
1218 return nfserr_notsupp;
1222 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1226 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
1229 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1230 return nfserr_bad_xdr;
1231 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1232 return nfserr_bad_xdr;
1238 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1242 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1243 return nfserr_bad_xdr;
1244 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1247 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1248 return nfserr_bad_xdr;
1249 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1250 return nfserr_bad_xdr;
1251 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1252 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1253 return nfserr_bad_xdr;
1259 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1261 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1265 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1269 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1272 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1276 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1278 return nfsd4_decode_clientid4(argp, clientid);
1282 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1283 struct nfsd4_secinfo *secinfo)
1285 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
1289 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1293 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
1296 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1297 ARRAY_SIZE(setattr->sa_bmval),
1298 &setattr->sa_iattr, &setattr->sa_acl,
1299 &setattr->sa_label, NULL);
1303 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1307 if (argp->minorversion >= 1)
1308 return nfserr_notsupp;
1310 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1313 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1316 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
1317 return nfserr_bad_xdr;
1318 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1319 return nfserr_bad_xdr;
1320 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1322 return nfserr_bad_xdr;
1323 setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
1324 setclientid->se_callback_netid_len);
1325 if (!setclientid->se_callback_netid_val)
1326 return nfserr_jukebox;
1328 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1329 return nfserr_bad_xdr;
1330 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1332 return nfserr_bad_xdr;
1333 setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
1334 setclientid->se_callback_addr_len);
1335 if (!setclientid->se_callback_addr_val)
1336 return nfserr_jukebox;
1337 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1338 return nfserr_bad_xdr;
1344 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1348 if (argp->minorversion >= 1)
1349 return nfserr_notsupp;
1351 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1354 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1357 /* Also used for NVERIFY */
1359 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1363 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1364 ARRAY_SIZE(verify->ve_bmval));
1368 /* For convenience's sake, we compare raw xdr'd attributes in
1369 * nfsd4_proc_verify */
1371 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1372 return nfserr_bad_xdr;
1373 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1375 return nfserr_bad_xdr;
1376 verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
1377 if (!verify->ve_attrval)
1378 return nfserr_jukebox;
1384 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1388 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
1391 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1392 return nfserr_bad_xdr;
1393 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1394 return nfserr_bad_xdr;
1395 if (write->wr_stable_how > NFS_FILE_SYNC)
1396 return nfserr_bad_xdr;
1397 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1398 return nfserr_bad_xdr;
1399 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
1400 return nfserr_bad_xdr;
1406 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1410 if (argp->minorversion >= 1)
1411 return nfserr_notsupp;
1413 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1414 &rlockowner->rl_owner);
1418 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1419 return nfserr_inval;
1424 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
1426 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1427 return nfserr_bad_xdr;
1428 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1431 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
1433 u32 use_conn_in_rdma_mode;
1436 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1439 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1440 return nfserr_bad_xdr;
1441 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1442 return nfserr_bad_xdr;
1448 nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1449 struct nfsd4_exchange_id *exid)
1453 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1454 ARRAY_SIZE(exid->spo_must_enforce));
1456 return nfserr_bad_xdr;
1457 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1458 ARRAY_SIZE(exid->spo_must_allow));
1460 return nfserr_bad_xdr;
1466 * This implementation currently does not support SP4_SSV.
1467 * This decoder simply skips over these arguments.
1469 static noinline __be32
1470 nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1471 struct nfsd4_exchange_id *exid)
1473 u32 count, window, num_gss_handles;
1477 status = nfsd4_decode_state_protect_ops(argp, exid);
1481 /* ssp_hash_algs<> */
1482 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1483 return nfserr_bad_xdr;
1485 status = nfsd4_decode_ignored_string(argp, 0);
1490 /* ssp_encr_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 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1500 return nfserr_bad_xdr;
1501 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1502 return nfserr_bad_xdr;
1508 nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1509 struct nfsd4_exchange_id *exid)
1513 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
1514 return nfserr_bad_xdr;
1515 switch (exid->spa_how) {
1519 status = nfsd4_decode_state_protect_ops(argp, exid);
1524 status = nfsd4_decode_ssv_sp_parms(argp, exid);
1529 return nfserr_bad_xdr;
1536 nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1537 struct nfsd4_exchange_id *exid)
1542 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1543 return nfserr_bad_xdr;
1548 /* Note that RFC 8881 places no length limit on
1549 * nii_domain, but this implementation permits no
1550 * more than NFS4_OPAQUE_LIMIT bytes */
1551 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1554 /* Note that RFC 8881 places no length limit on
1555 * nii_name, but this implementation permits no
1556 * more than NFS4_OPAQUE_LIMIT bytes */
1557 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1560 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1565 return nfserr_bad_xdr;
1572 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1573 struct nfsd4_exchange_id *exid)
1577 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1580 status = nfsd4_decode_opaque(argp, &exid->clname);
1583 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1584 return nfserr_bad_xdr;
1585 status = nfsd4_decode_state_protect4_a(argp, exid);
1588 return nfsd4_decode_nfs_impl_id4(argp, exid);
1592 nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1593 struct nfsd4_channel_attrs *ca)
1597 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1599 return nfserr_bad_xdr;
1601 /* headerpadsz is ignored */
1603 ca->maxreq_sz = be32_to_cpup(p++);
1604 ca->maxresp_sz = be32_to_cpup(p++);
1605 ca->maxresp_cached = be32_to_cpup(p++);
1606 ca->maxops = be32_to_cpup(p++);
1607 ca->maxreqs = be32_to_cpup(p++);
1608 ca->nr_rdma_attrs = be32_to_cpup(p);
1609 switch (ca->nr_rdma_attrs) {
1613 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1614 return nfserr_bad_xdr;
1617 return nfserr_bad_xdr;
1624 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1625 struct nfsd4_create_session *sess)
1629 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1632 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1633 return nfserr_bad_xdr;
1634 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1635 return nfserr_bad_xdr;
1636 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1639 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
1642 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1643 return nfserr_bad_xdr;
1644 status = nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1652 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1653 struct nfsd4_destroy_session *destroy_session)
1655 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
1659 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1660 struct nfsd4_free_stateid *free_stateid)
1662 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
1665 #ifdef CONFIG_NFSD_PNFS
1667 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1668 struct nfsd4_getdeviceinfo *gdev)
1672 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1675 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1676 return nfserr_bad_xdr;
1677 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1678 return nfserr_bad_xdr;
1679 if (xdr_stream_decode_uint32_array(argp->xdr,
1680 &gdev->gd_notify_types, 1) < 0)
1681 return nfserr_bad_xdr;
1687 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1688 struct nfsd4_layoutcommit *lcp)
1692 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1693 return nfserr_bad_xdr;
1694 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1695 return nfserr_bad_xdr;
1696 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1697 return nfserr_bad_xdr;
1698 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1701 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1702 return nfserr_bad_xdr;
1703 if (lcp->lc_newoffset) {
1704 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1705 return nfserr_bad_xdr;
1707 lcp->lc_last_wr = 0;
1708 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1710 return nfserr_bad_xdr;
1711 if (xdr_item_is_present(p)) {
1712 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1716 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1718 return nfsd4_decode_layoutupdate4(argp, lcp);
1722 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1723 struct nfsd4_layoutget *lgp)
1727 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1728 return nfserr_bad_xdr;
1729 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1730 return nfserr_bad_xdr;
1731 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1732 return nfserr_bad_xdr;
1733 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1734 return nfserr_bad_xdr;
1735 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1736 return nfserr_bad_xdr;
1737 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1738 return nfserr_bad_xdr;
1739 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
1742 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1743 return nfserr_bad_xdr;
1749 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1750 struct nfsd4_layoutreturn *lrp)
1752 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1753 return nfserr_bad_xdr;
1754 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1755 return nfserr_bad_xdr;
1756 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1757 return nfserr_bad_xdr;
1758 return nfsd4_decode_layoutreturn4(argp, lrp);
1760 #endif /* CONFIG_NFSD_PNFS */
1762 static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1763 struct nfsd4_secinfo_no_name *sin)
1765 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1766 return nfserr_bad_xdr;
1771 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1772 struct nfsd4_sequence *seq)
1776 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1779 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1781 return nfserr_bad_xdr;
1782 seq->seqid = be32_to_cpup(p++);
1783 seq->slotid = be32_to_cpup(p++);
1784 seq->maxslots = be32_to_cpup(p++);
1785 seq->cachethis = be32_to_cpup(p);
1791 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1793 struct nfsd4_test_stateid_id *stateid;
1797 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1798 return nfserr_bad_xdr;
1800 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1801 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1802 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1804 return nfserrno(-ENOMEM); /* XXX: not jukebox? */
1805 INIT_LIST_HEAD(&stateid->ts_id_list);
1806 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1807 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1815 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1816 struct nfsd4_destroy_clientid *dc)
1818 return nfsd4_decode_clientid4(argp, &dc->clientid);
1821 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1822 struct nfsd4_reclaim_complete *rc)
1824 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1825 return nfserr_bad_xdr;
1830 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1831 struct nfsd4_fallocate *fallocate)
1835 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
1838 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1839 return nfserr_bad_xdr;
1840 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1841 return nfserr_bad_xdr;
1846 static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1847 struct nl4_server *ns)
1849 struct nfs42_netaddr *naddr;
1852 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1853 return nfserr_bad_xdr;
1855 /* currently support for 1 inter-server source server */
1856 switch (ns->nl4_type) {
1858 naddr = &ns->u.nl4_addr;
1860 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1861 return nfserr_bad_xdr;
1862 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1863 return nfserr_bad_xdr;
1865 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1867 return nfserr_bad_xdr;
1868 memcpy(naddr->netid, p, naddr->netid_len);
1870 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1871 return nfserr_bad_xdr;
1872 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1873 return nfserr_bad_xdr;
1875 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1877 return nfserr_bad_xdr;
1878 memcpy(naddr->addr, p, naddr->addr_len);
1881 return nfserr_bad_xdr;
1888 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1890 struct nl4_server *ns_dummy;
1891 u32 consecutive, i, count;
1894 status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid);
1897 status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid);
1900 if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0)
1901 return nfserr_bad_xdr;
1902 if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0)
1903 return nfserr_bad_xdr;
1904 if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0)
1905 return nfserr_bad_xdr;
1906 /* ca_consecutive: we always do consecutive copies */
1907 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1908 return nfserr_bad_xdr;
1909 if (xdr_stream_decode_u32(argp->xdr, ©->cp_synchronous) < 0)
1910 return nfserr_bad_xdr;
1912 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1913 return nfserr_bad_xdr;
1914 copy->cp_intra = false;
1915 if (count == 0) { /* intra-server copy */
1916 copy->cp_intra = true;
1920 /* decode all the supplied server addresses but use only the first */
1921 status = nfsd4_decode_nl4_server(argp, ©->cp_src);
1925 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1926 if (ns_dummy == NULL)
1927 return nfserrno(-ENOMEM); /* XXX: jukebox? */
1928 for (i = 0; i < count - 1; i++) {
1929 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1941 nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1942 struct nfsd4_copy_notify *cn)
1946 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
1949 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1953 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1954 struct nfsd4_offload_status *os)
1956 return nfsd4_decode_stateid4(argp, &os->stateid);
1960 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1964 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
1967 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
1968 return nfserr_bad_xdr;
1969 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
1970 return nfserr_bad_xdr;
1976 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1980 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
1983 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
1986 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
1987 return nfserr_bad_xdr;
1988 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
1989 return nfserr_bad_xdr;
1990 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
1991 return nfserr_bad_xdr;
1997 * XDR data that is more than PAGE_SIZE in size is normally part of a
1998 * read or write. However, the size of extended attributes is limited
1999 * by the maximum request size, and then further limited by the underlying
2000 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2001 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2002 * and we're not dealing with contiguous pages, we need to do some copying.
2006 * Decode data into buffer.
2009 nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2010 char **bufp, u32 buflen)
2012 struct page **pages = xdr->pages;
2013 struct kvec *head = xdr->head;
2017 if (buflen <= head->iov_len) {
2019 * We're in luck, the head has enough space. Just return
2020 * the head, no need for copying.
2022 *bufp = head->iov_base;
2026 tmp = svcxdr_tmpalloc(argp, buflen);
2028 return nfserr_jukebox;
2031 memcpy(dp, head->iov_base, head->iov_len);
2032 buflen -= head->iov_len;
2033 dp += head->iov_len;
2035 while (buflen > 0) {
2036 len = min_t(u32, buflen, PAGE_SIZE);
2037 memcpy(dp, page_address(*pages), len);
2049 * Get a user extended attribute name from the XDR buffer.
2050 * It will not have the "user." prefix, so prepend it.
2051 * Lastly, check for nul characters in the name.
2054 nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2056 char *name, *sp, *dp;
2060 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2061 return nfserr_bad_xdr;
2062 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2063 return nfserr_nametoolong;
2065 return nfserr_bad_xdr;
2066 p = xdr_inline_decode(argp->xdr, namelen);
2068 return nfserr_bad_xdr;
2069 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2071 return nfserr_jukebox;
2072 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2075 * Copy the extended attribute name over while checking for 0
2079 dp = name + XATTR_USER_PREFIX_LEN;
2084 return nfserr_bad_xdr;
2095 * A GETXATTR op request comes without a length specifier. We just set the
2096 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2097 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2098 * check it against getxa_len, and allocate + return the value.
2101 nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2102 struct nfsd4_getxattr *getxattr)
2107 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2111 maxcount = svc_max_payload(argp->rqstp);
2112 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2114 getxattr->getxa_len = maxcount;
2120 nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2121 struct nfsd4_setxattr *setxattr)
2123 u32 flags, maxcount, size;
2126 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2127 return nfserr_bad_xdr;
2129 if (flags > SETXATTR4_REPLACE)
2130 return nfserr_inval;
2131 setxattr->setxa_flags = flags;
2133 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2137 maxcount = svc_max_payload(argp->rqstp);
2138 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2140 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2141 return nfserr_bad_xdr;
2142 if (size > maxcount)
2143 return nfserr_xattr2big;
2145 setxattr->setxa_len = size;
2147 struct xdr_buf payload;
2149 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
2150 return nfserr_bad_xdr;
2151 status = nfsd4_vbuf_from_vector(argp, &payload,
2152 &setxattr->setxa_buf, size);
2159 nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2160 struct nfsd4_listxattrs *listxattrs)
2164 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2165 return nfserr_bad_xdr;
2168 * If the cookie is too large to have even one user.x attribute
2169 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2171 if (listxattrs->lsxa_cookie >=
2172 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2173 return nfserr_badcookie;
2175 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2176 return nfserr_bad_xdr;
2178 /* Always need at least 2 words (length and one character) */
2179 return nfserr_inval;
2181 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2182 listxattrs->lsxa_maxcount = maxcount;
2188 nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2189 struct nfsd4_removexattr *removexattr)
2191 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2195 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2201 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2203 return nfserr_notsupp;
2206 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2208 static const nfsd4_dec nfsd4_dec_ops[] = {
2209 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2210 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2211 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2212 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2213 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2214 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2215 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2216 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2217 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2218 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2219 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2220 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2221 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2222 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2223 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2224 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2225 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2226 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2227 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2228 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
2229 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
2230 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2231 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2232 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2233 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2234 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2235 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2236 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2237 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2238 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2239 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2240 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2241 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2242 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2243 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2244 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2245 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2247 /* new operations for NFSv4.1 */
2248 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
2249 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
2250 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2251 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2252 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
2253 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
2254 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2255 #ifdef CONFIG_NFSD_PNFS
2256 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2257 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2258 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2259 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2260 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2262 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2263 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2264 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2265 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2266 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
2268 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
2269 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2270 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
2271 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
2272 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2273 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
2274 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2276 /* new operations for NFSv4.2 */
2277 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2278 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
2279 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
2280 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2281 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2282 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2283 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
2284 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
2285 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
2286 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
2287 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
2288 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
2289 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2290 /* RFC 8276 extended atributes operations */
2291 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2292 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2293 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2294 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2298 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2300 if (op->opnum < FIRST_NFS4_OP)
2302 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
2304 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2306 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
2312 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2314 struct nfsd4_op *op;
2315 bool cachethis = false;
2316 int auth_slack= argp->rqstp->rq_auth_slack;
2317 int max_reply = auth_slack + 8; /* opcnt, status */
2323 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
2325 max_reply += XDR_UNIT;
2327 if (unlikely(argp->taglen)) {
2328 if (argp->taglen > NFSD4_MAX_TAGLEN)
2330 p = xdr_inline_decode(argp->xdr, argp->taglen);
2333 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
2336 max_reply += xdr_align_size(argp->taglen);
2339 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
2341 if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0)
2345 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2346 * here, so we return success at the xdr level so that
2347 * nfsd4_proc can handle this is an NFS-level error.
2349 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2352 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
2353 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
2355 argp->ops = argp->iops;
2356 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
2361 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
2364 for (i = 0; i < argp->opcnt; i++) {
2368 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
2370 if (nfsd4_opnum_in_range(argp, op)) {
2371 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
2372 if (op->status != nfs_ok)
2373 trace_nfsd_compound_decode_err(argp->rqstp,
2378 op->opnum = OP_ILLEGAL;
2379 op->status = nfserr_op_illegal;
2381 op->opdesc = OPDESC(op);
2383 * We'll try to cache the result in the DRC if any one
2384 * op in the compound wants to be cached:
2386 cachethis |= nfsd4_cache_this_op(op);
2388 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
2390 readbytes += nfsd4_max_reply(argp->rqstp, op);
2392 max_reply += nfsd4_max_reply(argp->rqstp, op);
2394 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2395 * (Special case because it will just skip encoding this
2396 * if it runs out of xdr buffer space, and it is the only
2397 * operation that behaves this way.)
2399 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
2400 max_reply += NFS4_OPAQUE_LIMIT;
2407 /* Sessions make the DRC unnecessary: */
2408 if (argp->minorversion)
2410 svc_reserve(argp->rqstp, max_reply + readbytes);
2411 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
2413 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
2414 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
2419 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2420 struct svc_export *exp)
2422 if (exp->ex_flags & NFSEXP_V4ROOT) {
2423 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2426 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
2431 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2432 * doesn't really care what resolution could theoretically be stored by
2435 * The client cares how close together changes can be while still
2436 * guaranteeing ctime changes. For most filesystems (which have
2437 * timestamps with nanosecond fields) that is limited by the resolution
2438 * of the time returned from current_time() (which I'm assuming to be
2441 static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2443 struct timespec64 ts;
2446 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2447 ts = ns_to_timespec64(ns);
2449 p = xdr_encode_hyper(p, ts.tv_sec);
2450 *p++ = cpu_to_be32(ts.tv_nsec);
2455 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
2457 *p++ = cpu_to_be32(c->atomic);
2458 p = xdr_encode_hyper(p, c->before_change);
2459 p = xdr_encode_hyper(p, c->after_change);
2463 /* Encode as an array of strings the string given with components
2464 * separated @sep, escaped with esc_enter and esc_exit.
2466 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2467 char *components, char esc_enter,
2473 int strlen, count=0;
2474 char *str, *end, *next;
2476 dprintk("nfsd4_encode_components(%s)\n", components);
2478 pathlen_offset = xdr->buf->len;
2479 p = xdr_reserve_space(xdr, 4);
2481 return nfserr_resource;
2482 p++; /* We will fill this in with @count later */
2484 end = str = components;
2486 bool found_esc = false;
2488 /* try to parse as esc_start, ..., esc_end, sep */
2489 if (*str == esc_enter) {
2490 for (; *end && (*end != esc_exit); end++)
2491 /* find esc_exit or end of string */;
2493 if (*end && (!*next || *next == sep)) {
2500 for (; *end && (*end != sep); end++)
2501 /* find sep or end of string */;
2505 p = xdr_reserve_space(xdr, strlen + 4);
2507 return nfserr_resource;
2508 p = xdr_encode_opaque(p, str, strlen);
2518 pathlen = htonl(count);
2519 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2523 /* Encode as an array of strings the string given with components
2526 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2529 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2533 * encode a location element of a fs_locations structure
2535 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2536 struct nfsd4_fs_location *location)
2540 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2544 status = nfsd4_encode_components(xdr, '/', location->path);
2551 * Encode a path in RFC3530 'pathname4' format
2553 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2554 const struct path *root,
2555 const struct path *path)
2557 struct path cur = *path;
2559 struct dentry **components = NULL;
2560 unsigned int ncomponents = 0;
2561 __be32 err = nfserr_jukebox;
2563 dprintk("nfsd4_encode_components(");
2566 /* First walk the path up to the nfsd root, and store the
2567 * dentries/path components in an array.
2570 if (path_equal(&cur, root))
2572 if (cur.dentry == cur.mnt->mnt_root) {
2573 if (follow_up(&cur))
2577 if ((ncomponents & 15) == 0) {
2578 struct dentry **new;
2579 new = krealloc(components,
2580 sizeof(*new) * (ncomponents + 16),
2586 components[ncomponents++] = cur.dentry;
2587 cur.dentry = dget_parent(cur.dentry);
2589 err = nfserr_resource;
2590 p = xdr_reserve_space(xdr, 4);
2593 *p++ = cpu_to_be32(ncomponents);
2595 while (ncomponents) {
2596 struct dentry *dentry = components[ncomponents - 1];
2599 spin_lock(&dentry->d_lock);
2600 len = dentry->d_name.len;
2601 p = xdr_reserve_space(xdr, len + 4);
2603 spin_unlock(&dentry->d_lock);
2606 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2607 dprintk("/%pd", dentry);
2608 spin_unlock(&dentry->d_lock);
2617 dput(components[--ncomponents]);
2623 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2624 struct svc_rqst *rqstp, const struct path *path)
2626 struct svc_export *exp_ps;
2629 exp_ps = rqst_find_fsidzero_export(rqstp);
2631 return nfserrno(PTR_ERR(exp_ps));
2632 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2638 * encode a fs_locations structure
2640 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2641 struct svc_rqst *rqstp, struct svc_export *exp)
2646 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2648 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2651 p = xdr_reserve_space(xdr, 4);
2653 return nfserr_resource;
2654 *p++ = cpu_to_be32(fslocs->locations_count);
2655 for (i=0; i<fslocs->locations_count; i++) {
2656 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2663 static u32 nfs4_file_type(umode_t mode)
2665 switch (mode & S_IFMT) {
2666 case S_IFIFO: return NF4FIFO;
2667 case S_IFCHR: return NF4CHR;
2668 case S_IFDIR: return NF4DIR;
2669 case S_IFBLK: return NF4BLK;
2670 case S_IFLNK: return NF4LNK;
2671 case S_IFREG: return NF4REG;
2672 case S_IFSOCK: return NF4SOCK;
2673 default: return NF4BAD;
2677 static inline __be32
2678 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2679 struct nfs4_ace *ace)
2681 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2682 return nfs4_acl_write_who(xdr, ace->whotype);
2683 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2684 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2686 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2689 static inline __be32
2690 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2693 unsigned long i = hweight_long(layout_types);
2695 p = xdr_reserve_space(xdr, 4 + 4 * i);
2697 return nfserr_resource;
2699 *p++ = cpu_to_be32(i);
2701 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2702 if (layout_types & (1 << i))
2703 *p++ = cpu_to_be32(i);
2708 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2709 FATTR4_WORD0_RDATTR_ERROR)
2710 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2711 #define WORD2_ABSENT_FS_ATTRS 0
2713 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2714 static inline __be32
2715 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2716 void *context, int len)
2720 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2722 return nfserr_resource;
2725 * For now we use a 0 here to indicate the null translation; in
2726 * the future we may place a call to translation code here.
2728 *p++ = cpu_to_be32(0); /* lfs */
2729 *p++ = cpu_to_be32(0); /* pi */
2730 p = xdr_encode_opaque(p, context, len);
2734 static inline __be32
2735 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2736 void *context, int len)
2740 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2742 /* As per referral draft: */
2743 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2744 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2745 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2746 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2747 *rdattr_err = NFSERR_MOVED;
2749 return nfserr_moved;
2751 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2752 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2753 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2758 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2760 struct path path = exp->ex_path;
2764 while (follow_up(&path)) {
2765 if (path.dentry != path.mnt->mnt_root)
2768 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2774 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2779 p = xdr_reserve_space(xdr, 16);
2782 *p++ = cpu_to_be32(3);
2783 *p++ = cpu_to_be32(bmval0);
2784 *p++ = cpu_to_be32(bmval1);
2785 *p++ = cpu_to_be32(bmval2);
2786 } else if (bmval1) {
2787 p = xdr_reserve_space(xdr, 12);
2790 *p++ = cpu_to_be32(2);
2791 *p++ = cpu_to_be32(bmval0);
2792 *p++ = cpu_to_be32(bmval1);
2794 p = xdr_reserve_space(xdr, 8);
2797 *p++ = cpu_to_be32(1);
2798 *p++ = cpu_to_be32(bmval0);
2803 return nfserr_resource;
2807 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2811 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2812 struct svc_export *exp,
2813 struct dentry *dentry, u32 *bmval,
2814 struct svc_rqst *rqstp, int ignore_crossmnt)
2816 u32 bmval0 = bmval[0];
2817 u32 bmval1 = bmval[1];
2818 u32 bmval2 = bmval[2];
2820 struct svc_fh *tempfh = NULL;
2821 struct kstatfs statfs;
2823 int starting_len = xdr->buf->len;
2831 struct nfs4_acl *acl = NULL;
2832 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2833 void *context = NULL;
2836 bool contextsupport = false;
2837 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2838 u32 minorversion = resp->cstate.minorversion;
2839 struct path path = {
2840 .mnt = exp->ex_path.mnt,
2843 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2845 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2846 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2848 if (exp->ex_fslocs.migrated) {
2849 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2854 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2857 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2858 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2859 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2860 FATTR4_WORD1_SPACE_TOTAL))) {
2861 err = vfs_statfs(&path, &statfs);
2865 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2866 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2867 status = nfserr_jukebox;
2870 fh_init(tempfh, NFS4_FHSIZE);
2871 status = fh_compose(tempfh, exp, dentry, NULL);
2876 if (bmval0 & FATTR4_WORD0_ACL) {
2877 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2878 if (err == -EOPNOTSUPP)
2879 bmval0 &= ~FATTR4_WORD0_ACL;
2880 else if (err == -EINVAL) {
2881 status = nfserr_attrnotsupp;
2883 } else if (err != 0)
2887 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2888 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2889 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2890 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2891 err = security_inode_getsecctx(d_inode(dentry),
2892 &context, &contextlen);
2895 contextsupport = (err == 0);
2896 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2897 if (err == -EOPNOTSUPP)
2898 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2903 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2905 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2909 attrlen_offset = xdr->buf->len;
2910 p = xdr_reserve_space(xdr, 4);
2913 p++; /* to be backfilled later */
2915 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2918 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2920 if (!IS_POSIXACL(dentry->d_inode))
2921 supp[0] &= ~FATTR4_WORD0_ACL;
2922 if (!contextsupport)
2923 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2925 p = xdr_reserve_space(xdr, 12);
2928 *p++ = cpu_to_be32(2);
2929 *p++ = cpu_to_be32(supp[0]);
2930 *p++ = cpu_to_be32(supp[1]);
2932 p = xdr_reserve_space(xdr, 16);
2935 *p++ = cpu_to_be32(3);
2936 *p++ = cpu_to_be32(supp[0]);
2937 *p++ = cpu_to_be32(supp[1]);
2938 *p++ = cpu_to_be32(supp[2]);
2941 if (bmval0 & FATTR4_WORD0_TYPE) {
2942 p = xdr_reserve_space(xdr, 4);
2945 dummy = nfs4_file_type(stat.mode);
2946 if (dummy == NF4BAD) {
2947 status = nfserr_serverfault;
2950 *p++ = cpu_to_be32(dummy);
2952 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2953 p = xdr_reserve_space(xdr, 4);
2956 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2957 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2959 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2960 NFS4_FH_VOL_RENAME);
2962 if (bmval0 & FATTR4_WORD0_CHANGE) {
2963 p = xdr_reserve_space(xdr, 8);
2966 p = encode_change(p, &stat, d_inode(dentry), exp);
2968 if (bmval0 & FATTR4_WORD0_SIZE) {
2969 p = xdr_reserve_space(xdr, 8);
2972 p = xdr_encode_hyper(p, stat.size);
2974 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2975 p = xdr_reserve_space(xdr, 4);
2978 *p++ = cpu_to_be32(1);
2980 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2981 p = xdr_reserve_space(xdr, 4);
2984 *p++ = cpu_to_be32(1);
2986 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2987 p = xdr_reserve_space(xdr, 4);
2990 *p++ = cpu_to_be32(0);
2992 if (bmval0 & FATTR4_WORD0_FSID) {
2993 p = xdr_reserve_space(xdr, 16);
2996 if (exp->ex_fslocs.migrated) {
2997 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2998 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2999 } else switch(fsid_source(fhp)) {
3000 case FSIDSOURCE_FSID:
3001 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
3002 p = xdr_encode_hyper(p, (u64)0);
3004 case FSIDSOURCE_DEV:
3005 *p++ = cpu_to_be32(0);
3006 *p++ = cpu_to_be32(MAJOR(stat.dev));
3007 *p++ = cpu_to_be32(0);
3008 *p++ = cpu_to_be32(MINOR(stat.dev));
3010 case FSIDSOURCE_UUID:
3011 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
3016 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
3017 p = xdr_reserve_space(xdr, 4);
3020 *p++ = cpu_to_be32(0);
3022 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
3023 p = xdr_reserve_space(xdr, 4);
3026 *p++ = cpu_to_be32(nn->nfsd4_lease);
3028 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
3029 p = xdr_reserve_space(xdr, 4);
3032 *p++ = cpu_to_be32(rdattr_err);
3034 if (bmval0 & FATTR4_WORD0_ACL) {
3035 struct nfs4_ace *ace;
3038 p = xdr_reserve_space(xdr, 4);
3042 *p++ = cpu_to_be32(0);
3045 p = xdr_reserve_space(xdr, 4);
3048 *p++ = cpu_to_be32(acl->naces);
3050 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
3051 p = xdr_reserve_space(xdr, 4*3);
3054 *p++ = cpu_to_be32(ace->type);
3055 *p++ = cpu_to_be32(ace->flag);
3056 *p++ = cpu_to_be32(ace->access_mask &
3058 status = nfsd4_encode_aclname(xdr, rqstp, ace);
3064 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
3065 p = xdr_reserve_space(xdr, 4);
3068 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
3069 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
3071 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
3072 p = xdr_reserve_space(xdr, 4);
3075 *p++ = cpu_to_be32(1);
3077 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
3078 p = xdr_reserve_space(xdr, 4);
3081 *p++ = cpu_to_be32(0);
3083 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
3084 p = xdr_reserve_space(xdr, 4);
3087 *p++ = cpu_to_be32(1);
3089 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
3090 p = xdr_reserve_space(xdr, 4);
3093 *p++ = cpu_to_be32(1);
3095 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
3096 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
3099 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw,
3100 fhp->fh_handle.fh_size);
3102 if (bmval0 & FATTR4_WORD0_FILEID) {
3103 p = xdr_reserve_space(xdr, 8);
3106 p = xdr_encode_hyper(p, stat.ino);
3108 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
3109 p = xdr_reserve_space(xdr, 8);
3112 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3114 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
3115 p = xdr_reserve_space(xdr, 8);
3118 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3120 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
3121 p = xdr_reserve_space(xdr, 8);
3124 p = xdr_encode_hyper(p, (u64) statfs.f_files);
3126 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
3127 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
3131 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
3132 p = xdr_reserve_space(xdr, 4);
3135 *p++ = cpu_to_be32(1);
3137 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
3138 p = xdr_reserve_space(xdr, 8);
3141 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
3143 if (bmval0 & FATTR4_WORD0_MAXLINK) {
3144 p = xdr_reserve_space(xdr, 4);
3147 *p++ = cpu_to_be32(255);
3149 if (bmval0 & FATTR4_WORD0_MAXNAME) {
3150 p = xdr_reserve_space(xdr, 4);
3153 *p++ = cpu_to_be32(statfs.f_namelen);
3155 if (bmval0 & FATTR4_WORD0_MAXREAD) {
3156 p = xdr_reserve_space(xdr, 8);
3159 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3161 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
3162 p = xdr_reserve_space(xdr, 8);
3165 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3167 if (bmval1 & FATTR4_WORD1_MODE) {
3168 p = xdr_reserve_space(xdr, 4);
3171 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
3173 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
3174 p = xdr_reserve_space(xdr, 4);
3177 *p++ = cpu_to_be32(1);
3179 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
3180 p = xdr_reserve_space(xdr, 4);
3183 *p++ = cpu_to_be32(stat.nlink);
3185 if (bmval1 & FATTR4_WORD1_OWNER) {
3186 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
3190 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
3191 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
3195 if (bmval1 & FATTR4_WORD1_RAWDEV) {
3196 p = xdr_reserve_space(xdr, 8);
3199 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3200 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
3202 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
3203 p = xdr_reserve_space(xdr, 8);
3206 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
3207 p = xdr_encode_hyper(p, dummy64);
3209 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
3210 p = xdr_reserve_space(xdr, 8);
3213 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
3214 p = xdr_encode_hyper(p, dummy64);
3216 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
3217 p = xdr_reserve_space(xdr, 8);
3220 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
3221 p = xdr_encode_hyper(p, dummy64);
3223 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
3224 p = xdr_reserve_space(xdr, 8);
3227 dummy64 = (u64)stat.blocks << 9;
3228 p = xdr_encode_hyper(p, dummy64);
3230 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
3231 p = xdr_reserve_space(xdr, 12);
3234 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
3235 *p++ = cpu_to_be32(stat.atime.tv_nsec);
3237 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
3238 p = xdr_reserve_space(xdr, 12);
3241 p = encode_time_delta(p, d_inode(dentry));
3243 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
3244 p = xdr_reserve_space(xdr, 12);
3247 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
3248 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
3250 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
3251 p = xdr_reserve_space(xdr, 12);
3254 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
3255 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
3257 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
3258 struct kstat parent_stat;
3261 p = xdr_reserve_space(xdr, 8);
3265 * Get parent's attributes if not ignoring crossmount
3266 * and this is the root of a cross-mounted filesystem.
3268 if (ignore_crossmnt == 0 &&
3269 dentry == exp->ex_path.mnt->mnt_root) {
3270 err = get_parent_attributes(exp, &parent_stat);
3273 ino = parent_stat.ino;
3275 p = xdr_encode_hyper(p, ino);
3277 #ifdef CONFIG_NFSD_PNFS
3278 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
3279 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3284 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
3285 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3290 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3291 p = xdr_reserve_space(xdr, 4);
3294 *p++ = cpu_to_be32(stat.blksize);
3296 #endif /* CONFIG_NFSD_PNFS */
3297 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
3300 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3301 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3302 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3303 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3305 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
3310 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3311 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3312 status = nfsd4_encode_security_label(xdr, rqstp, context,
3319 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3320 p = xdr_reserve_space(xdr, 4);
3323 err = xattr_supported_namespace(d_inode(dentry),
3325 *p++ = cpu_to_be32(err == 0);
3328 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
3329 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
3333 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3335 security_release_secctx(context, contextlen);
3336 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
3343 xdr_truncate_encode(xdr, starting_len);
3346 status = nfserrno(err);
3349 status = nfserr_resource;
3353 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3354 struct xdr_buf *buf, __be32 *p, int bytes)
3356 xdr->scratch.iov_len = 0;
3357 memset(buf, 0, sizeof(struct xdr_buf));
3358 buf->head[0].iov_base = p;
3359 buf->head[0].iov_len = 0;
3362 xdr->iov = buf->head;
3364 xdr->end = (void *)p + bytes;
3365 buf->buflen = bytes;
3368 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3369 struct svc_fh *fhp, struct svc_export *exp,
3370 struct dentry *dentry, u32 *bmval,
3371 struct svc_rqst *rqstp, int ignore_crossmnt)
3373 struct xdr_buf dummy;
3374 struct xdr_stream xdr;
3377 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
3378 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3384 static inline int attributes_need_mount(u32 *bmval)
3386 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3388 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3394 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3395 const char *name, int namlen)
3397 struct svc_export *exp = cd->rd_fhp->fh_export;
3398 struct dentry *dentry;
3400 int ignore_crossmnt = 0;
3402 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
3404 return nfserrno(PTR_ERR(dentry));
3408 * In the case of a mountpoint, the client may be asking for
3409 * attributes that are only properties of the underlying filesystem
3410 * as opposed to the cross-mounted file system. In such a case,
3411 * we will not follow the cross mount and will fill the attribtutes
3412 * directly from the mountpoint dentry.
3414 if (nfsd_mountpoint(dentry, exp)) {
3417 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3418 && !attributes_need_mount(cd->rd_bmval)) {
3419 ignore_crossmnt = 1;
3423 * Why the heck aren't we just using nfsd_lookup??
3424 * Different "."/".." handling? Something else?
3425 * At least, add a comment here to explain....
3427 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3429 nfserr = nfserrno(err);
3432 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3438 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
3439 cd->rd_rqstp, ignore_crossmnt);
3447 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3451 p = xdr_reserve_space(xdr, 20);
3455 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3456 *p++ = htonl(0); /* bmval1 */
3458 *p++ = htonl(4); /* attribute length */
3459 *p++ = nfserr; /* no htonl */
3464 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3465 loff_t offset, u64 ino, unsigned int d_type)
3467 struct readdir_cd *ccd = ccdv;
3468 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3469 struct xdr_stream *xdr = cd->xdr;
3470 int start_offset = xdr->buf->len;
3472 u32 name_and_cookie;
3474 __be32 nfserr = nfserr_toosmall;
3478 /* In nfsv4, "." and ".." never make it onto the wire.. */
3479 if (name && isdotent(name, namlen)) {
3480 cd->common.err = nfs_ok;
3484 if (cd->cookie_offset) {
3485 wire_offset = cpu_to_be64(offset);
3486 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3490 p = xdr_reserve_space(xdr, 4);
3493 *p++ = xdr_one; /* mark entry present */
3494 cookie_offset = xdr->buf->len;
3495 p = xdr_reserve_space(xdr, 3*4 + namlen);
3498 p = xdr_encode_hyper(p, OFFSET_MAX); /* offset of next entry */
3499 p = xdr_encode_array(p, name, namlen); /* name length & name */
3501 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3505 case nfserr_resource:
3506 nfserr = nfserr_toosmall;
3509 xdr_truncate_encode(xdr, start_offset);
3513 * If the client requested the RDATTR_ERROR attribute,
3514 * we stuff the error code into this attribute
3515 * and continue. If this attribute was not requested,
3516 * then in accordance with the spec, we fail the
3517 * entire READDIR operation(!)
3519 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3521 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3523 nfserr = nfserr_toosmall;
3527 nfserr = nfserr_toosmall;
3528 entry_bytes = xdr->buf->len - start_offset;
3529 if (entry_bytes > cd->rd_maxcount)
3531 cd->rd_maxcount -= entry_bytes;
3533 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3534 * notes that it could be zero. If it is zero, then the server
3535 * should enforce only the rd_maxcount value.
3537 if (cd->rd_dircount) {
3538 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3539 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3541 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3542 if (!cd->rd_dircount)
3543 cd->rd_maxcount = 0;
3546 cd->cookie_offset = cookie_offset;
3548 cd->common.err = nfs_ok;
3551 xdr_truncate_encode(xdr, start_offset);
3552 cd->common.err = nfserr;
3557 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3561 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3563 return nfserr_resource;
3564 *p++ = cpu_to_be32(sid->si_generation);
3565 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3566 sizeof(stateid_opaque_t));
3571 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3573 struct xdr_stream *xdr = resp->xdr;
3576 p = xdr_reserve_space(xdr, 8);
3578 return nfserr_resource;
3579 *p++ = cpu_to_be32(access->ac_supported);
3580 *p++ = cpu_to_be32(access->ac_resp_access);
3584 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3586 struct xdr_stream *xdr = resp->xdr;
3589 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3591 return nfserr_resource;
3592 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3593 NFS4_MAX_SESSIONID_LEN);
3594 *p++ = cpu_to_be32(bcts->dir);
3595 /* Upshifting from TCP to RDMA is not supported */
3596 *p++ = cpu_to_be32(0);
3601 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3603 struct xdr_stream *xdr = resp->xdr;
3605 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
3610 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3612 struct xdr_stream *xdr = resp->xdr;
3615 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3617 return nfserr_resource;
3618 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3619 NFS4_VERIFIER_SIZE);
3624 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3626 struct xdr_stream *xdr = resp->xdr;
3629 p = xdr_reserve_space(xdr, 20);
3631 return nfserr_resource;
3632 encode_cinfo(p, &create->cr_cinfo);
3633 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3634 create->cr_bmval[1], create->cr_bmval[2]);
3638 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3640 struct svc_fh *fhp = getattr->ga_fhp;
3641 struct xdr_stream *xdr = resp->xdr;
3643 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3644 getattr->ga_bmval, resp->rqstp, 0);
3648 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3650 struct xdr_stream *xdr = resp->xdr;
3651 struct svc_fh *fhp = *fhpp;
3655 len = fhp->fh_handle.fh_size;
3656 p = xdr_reserve_space(xdr, len + 4);
3658 return nfserr_resource;
3659 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_raw, len);
3664 * Including all fields other than the name, a LOCK4denied structure requires
3665 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3668 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3670 struct xdr_netobj *conf = &ld->ld_owner;
3674 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3677 * Don't fail to return the result just because we can't
3678 * return the conflicting open:
3686 return nfserr_resource;
3688 p = xdr_encode_hyper(p, ld->ld_start);
3689 p = xdr_encode_hyper(p, ld->ld_length);
3690 *p++ = cpu_to_be32(ld->ld_type);
3692 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3693 p = xdr_encode_opaque(p, conf->data, conf->len);
3695 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3696 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3697 *p++ = cpu_to_be32(0); /* length of owner name */
3699 return nfserr_denied;
3703 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3705 struct xdr_stream *xdr = resp->xdr;
3708 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3709 else if (nfserr == nfserr_denied)
3710 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3716 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3718 struct xdr_stream *xdr = resp->xdr;
3720 if (nfserr == nfserr_denied)
3721 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3726 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3728 struct xdr_stream *xdr = resp->xdr;
3730 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3735 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3737 struct xdr_stream *xdr = resp->xdr;
3740 p = xdr_reserve_space(xdr, 20);
3742 return nfserr_resource;
3743 p = encode_cinfo(p, &link->li_cinfo);
3749 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3751 struct xdr_stream *xdr = resp->xdr;
3754 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3757 p = xdr_reserve_space(xdr, 24);
3759 return nfserr_resource;
3760 p = encode_cinfo(p, &open->op_cinfo);
3761 *p++ = cpu_to_be32(open->op_rflags);
3763 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3768 p = xdr_reserve_space(xdr, 4);
3770 return nfserr_resource;
3772 *p++ = cpu_to_be32(open->op_delegate_type);
3773 switch (open->op_delegate_type) {
3774 case NFS4_OPEN_DELEGATE_NONE:
3776 case NFS4_OPEN_DELEGATE_READ:
3777 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3780 p = xdr_reserve_space(xdr, 20);
3782 return nfserr_resource;
3783 *p++ = cpu_to_be32(open->op_recall);
3786 * TODO: ACE's in delegations
3788 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3789 *p++ = cpu_to_be32(0);
3790 *p++ = cpu_to_be32(0);
3791 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3793 case NFS4_OPEN_DELEGATE_WRITE:
3794 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3797 p = xdr_reserve_space(xdr, 32);
3799 return nfserr_resource;
3800 *p++ = cpu_to_be32(0);
3803 * TODO: space_limit's in delegations
3805 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3806 *p++ = cpu_to_be32(~(u32)0);
3807 *p++ = cpu_to_be32(~(u32)0);
3810 * TODO: ACE's in delegations
3812 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3813 *p++ = cpu_to_be32(0);
3814 *p++ = cpu_to_be32(0);
3815 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3817 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3818 switch (open->op_why_no_deleg) {
3819 case WND4_CONTENTION:
3821 p = xdr_reserve_space(xdr, 8);
3823 return nfserr_resource;
3824 *p++ = cpu_to_be32(open->op_why_no_deleg);
3825 /* deleg signaling not supported yet: */
3826 *p++ = cpu_to_be32(0);
3829 p = xdr_reserve_space(xdr, 4);
3831 return nfserr_resource;
3832 *p++ = cpu_to_be32(open->op_why_no_deleg);
3838 /* XXX save filehandle here */
3843 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3845 struct xdr_stream *xdr = resp->xdr;
3847 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3851 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3853 struct xdr_stream *xdr = resp->xdr;
3855 return nfsd4_encode_stateid(xdr, &od->od_stateid);
3858 static __be32 nfsd4_encode_splice_read(
3859 struct nfsd4_compoundres *resp,
3860 struct nfsd4_read *read,
3861 struct file *file, unsigned long maxcount)
3863 struct xdr_stream *xdr = resp->xdr;
3864 struct xdr_buf *buf = xdr->buf;
3865 int status, space_left;
3868 __be32 *p = xdr->p - 2;
3870 /* Make sure there will be room for padding if needed */
3871 if (xdr->end - xdr->p < 1)
3872 return nfserr_resource;
3874 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3875 file, read->rd_offset, &maxcount, &eof);
3876 read->rd_length = maxcount;
3879 status = svc_encode_result_payload(read->rd_rqstp,
3880 buf->head[0].iov_len, maxcount);
3882 nfserr = nfserrno(status);
3886 *(p++) = htonl(eof);
3887 *(p++) = htonl(maxcount);
3889 buf->page_len = maxcount;
3890 buf->len += maxcount;
3891 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3894 /* Use rest of head for padding and remaining ops: */
3895 buf->tail[0].iov_base = xdr->p;
3896 buf->tail[0].iov_len = 0;
3897 xdr->iov = buf->tail;
3899 int pad = 4 - (maxcount&3);
3903 buf->tail[0].iov_base += maxcount&3;
3904 buf->tail[0].iov_len = pad;
3908 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3909 buf->buflen - buf->len);
3910 buf->buflen = buf->len + space_left;
3911 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3917 * nfsd_splice_actor may have already messed with the
3918 * page length; reset it so as not to confuse
3919 * xdr_truncate_encode in our caller.
3925 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3926 struct nfsd4_read *read,
3927 struct file *file, unsigned long maxcount)
3929 struct xdr_stream *xdr = resp->xdr;
3931 int starting_len = xdr->buf->len - 8;
3936 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
3937 if (read->rd_vlen < 0)
3938 return nfserr_resource;
3940 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3941 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3943 read->rd_length = maxcount;
3946 if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount))
3948 xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
3951 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3952 tmp = htonl(maxcount);
3953 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3956 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3957 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3964 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3965 struct nfsd4_read *read)
3967 unsigned long maxcount;
3968 struct xdr_stream *xdr = resp->xdr;
3970 int starting_len = xdr->buf->len;
3975 file = read->rd_nf->nf_file;
3977 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3979 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3980 return nfserr_resource;
3982 if (resp->xdr->buf->page_len &&
3983 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3985 return nfserr_resource;
3987 xdr_commit_encode(xdr);
3989 maxcount = min_t(unsigned long, read->rd_length,
3990 (xdr->buf->buflen - xdr->buf->len));
3992 if (file->f_op->splice_read &&
3993 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3994 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3996 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3999 xdr_truncate_encode(xdr, starting_len);
4005 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
4010 struct xdr_stream *xdr = resp->xdr;
4011 int length_offset = xdr->buf->len;
4015 p = xdr_reserve_space(xdr, 4);
4017 return nfserr_resource;
4018 maxcount = PAGE_SIZE;
4020 p = xdr_reserve_space(xdr, maxcount);
4022 return nfserr_resource;
4024 * XXX: By default, vfs_readlink() will truncate symlinks if they
4025 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4026 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4027 * that truncation occurred, and return NFS4ERR_RESOURCE.
4029 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4030 (char *)p, &maxcount);
4031 if (nfserr == nfserr_isdir)
4032 nfserr = nfserr_inval;
4035 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4038 nfserr = nfserrno(status);
4042 wire_count = htonl(maxcount);
4043 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
4044 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
4046 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
4047 &zero, 4 - (maxcount&3));
4051 xdr_truncate_encode(xdr, length_offset);
4056 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
4062 struct xdr_stream *xdr = resp->xdr;
4063 int starting_len = xdr->buf->len;
4066 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
4068 return nfserr_resource;
4070 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
4071 *p++ = cpu_to_be32(0);
4072 *p++ = cpu_to_be32(0);
4073 xdr->buf->head[0].iov_len = (char *)xdr->p -
4074 (char *)xdr->buf->head[0].iov_base;
4077 * Number of bytes left for directory entries allowing for the
4078 * final 8 bytes of the readdir and a following failed op:
4080 bytes_left = xdr->buf->buflen - xdr->buf->len
4081 - COMPOUND_ERR_SLACK_SPACE - 8;
4082 if (bytes_left < 0) {
4083 nfserr = nfserr_resource;
4086 maxcount = svc_max_payload(resp->rqstp);
4087 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
4089 * Note the rfc defines rd_maxcount as the size of the
4090 * READDIR4resok structure, which includes the verifier above
4091 * and the 8 bytes encoded at the end of this function:
4093 if (maxcount < 16) {
4094 nfserr = nfserr_toosmall;
4097 maxcount = min_t(int, maxcount-16, bytes_left);
4099 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
4100 if (!readdir->rd_dircount)
4101 readdir->rd_dircount = svc_max_payload(resp->rqstp);
4104 readdir->rd_maxcount = maxcount;
4105 readdir->common.err = 0;
4106 readdir->cookie_offset = 0;
4108 offset = readdir->rd_cookie;
4109 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4111 &readdir->common, nfsd4_encode_dirent);
4112 if (nfserr == nfs_ok &&
4113 readdir->common.err == nfserr_toosmall &&
4114 xdr->buf->len == starting_len + 8) {
4115 /* nothing encoded; which limit did we hit?: */
4116 if (maxcount - 16 < bytes_left)
4117 /* It was the fault of rd_maxcount: */
4118 nfserr = nfserr_toosmall;
4120 /* We ran out of buffer space: */
4121 nfserr = nfserr_resource;
4126 if (readdir->cookie_offset) {
4127 wire_offset = cpu_to_be64(offset);
4128 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4132 p = xdr_reserve_space(xdr, 8);
4137 *p++ = 0; /* no more entries */
4138 *p++ = htonl(readdir->common.err == nfserr_eof);
4142 xdr_truncate_encode(xdr, starting_len);
4147 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
4149 struct xdr_stream *xdr = resp->xdr;
4152 p = xdr_reserve_space(xdr, 20);
4154 return nfserr_resource;
4155 p = encode_cinfo(p, &remove->rm_cinfo);
4160 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
4162 struct xdr_stream *xdr = resp->xdr;
4165 p = xdr_reserve_space(xdr, 40);
4167 return nfserr_resource;
4168 p = encode_cinfo(p, &rename->rn_sinfo);
4169 p = encode_cinfo(p, &rename->rn_tinfo);
4174 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
4176 u32 i, nflavs, supported;
4177 struct exp_flavor_info *flavs;
4178 struct exp_flavor_info def_flavs[2];
4179 __be32 *p, *flavorsp;
4180 static bool report = true;
4182 if (exp->ex_nflavors) {
4183 flavs = exp->ex_flavors;
4184 nflavs = exp->ex_nflavors;
4185 } else { /* Handling of some defaults in absence of real secinfo: */
4187 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4189 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4190 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4191 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4193 flavs[0].pseudoflavor
4194 = svcauth_gss_flavor(exp->ex_client);
4197 flavs[0].pseudoflavor
4198 = exp->ex_client->flavour->flavour;
4203 p = xdr_reserve_space(xdr, 4);
4205 return nfserr_resource;
4206 flavorsp = p++; /* to be backfilled later */
4208 for (i = 0; i < nflavs; i++) {
4209 rpc_authflavor_t pf = flavs[i].pseudoflavor;
4210 struct rpcsec_gss_info info;
4212 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4214 p = xdr_reserve_space(xdr, 4 + 4 +
4215 XDR_LEN(info.oid.len) + 4 + 4);
4217 return nfserr_resource;
4218 *p++ = cpu_to_be32(RPC_AUTH_GSS);
4219 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
4220 *p++ = cpu_to_be32(info.qop);
4221 *p++ = cpu_to_be32(info.service);
4222 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4224 p = xdr_reserve_space(xdr, 4);
4226 return nfserr_resource;
4227 *p++ = cpu_to_be32(pf);
4230 pr_warn("NFS: SECINFO: security flavor %u "
4231 "is not supported\n", pf);
4235 if (nflavs != supported)
4237 *flavorsp = htonl(supported);
4242 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4243 struct nfsd4_secinfo *secinfo)
4245 struct xdr_stream *xdr = resp->xdr;
4247 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
4251 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4252 struct nfsd4_secinfo_no_name *secinfo)
4254 struct xdr_stream *xdr = resp->xdr;
4256 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
4260 * The SETATTR encode routine is special -- it always encodes a bitmap,
4261 * regardless of the error status.
4264 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
4266 struct xdr_stream *xdr = resp->xdr;
4269 p = xdr_reserve_space(xdr, 16);
4271 return nfserr_resource;
4273 *p++ = cpu_to_be32(3);
4274 *p++ = cpu_to_be32(0);
4275 *p++ = cpu_to_be32(0);
4276 *p++ = cpu_to_be32(0);
4279 *p++ = cpu_to_be32(3);
4280 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4281 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4282 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
4288 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
4290 struct xdr_stream *xdr = resp->xdr;
4294 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4296 return nfserr_resource;
4297 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4298 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4299 NFS4_VERIFIER_SIZE);
4301 else if (nfserr == nfserr_clid_inuse) {
4302 p = xdr_reserve_space(xdr, 8);
4304 return nfserr_resource;
4305 *p++ = cpu_to_be32(0);
4306 *p++ = cpu_to_be32(0);
4312 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
4314 struct xdr_stream *xdr = resp->xdr;
4317 p = xdr_reserve_space(xdr, 16);
4319 return nfserr_resource;
4320 *p++ = cpu_to_be32(write->wr_bytes_written);
4321 *p++ = cpu_to_be32(write->wr_how_written);
4322 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4323 NFS4_VERIFIER_SIZE);
4328 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
4329 struct nfsd4_exchange_id *exid)
4331 struct xdr_stream *xdr = resp->xdr;
4336 int server_scope_sz;
4337 uint64_t minor_id = 0;
4338 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
4340 major_id = nn->nfsd_name;
4341 major_id_sz = strlen(nn->nfsd_name);
4342 server_scope = nn->nfsd_name;
4343 server_scope_sz = strlen(nn->nfsd_name);
4345 p = xdr_reserve_space(xdr,
4346 8 /* eir_clientid */ +
4347 4 /* eir_sequenceid */ +
4351 return nfserr_resource;
4353 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
4354 *p++ = cpu_to_be32(exid->seqid);
4355 *p++ = cpu_to_be32(exid->flags);
4357 *p++ = cpu_to_be32(exid->spa_how);
4359 switch (exid->spa_how) {
4363 /* spo_must_enforce bitmap: */
4364 nfserr = nfsd4_encode_bitmap(xdr,
4365 exid->spo_must_enforce[0],
4366 exid->spo_must_enforce[1],
4367 exid->spo_must_enforce[2]);
4370 /* spo_must_allow bitmap: */
4371 nfserr = nfsd4_encode_bitmap(xdr,
4372 exid->spo_must_allow[0],
4373 exid->spo_must_allow[1],
4374 exid->spo_must_allow[2]);
4382 p = xdr_reserve_space(xdr,
4383 8 /* so_minor_id */ +
4384 4 /* so_major_id.len */ +
4385 (XDR_QUADLEN(major_id_sz) * 4) +
4386 4 /* eir_server_scope.len */ +
4387 (XDR_QUADLEN(server_scope_sz) * 4) +
4388 4 /* eir_server_impl_id.count (0) */);
4390 return nfserr_resource;
4392 /* The server_owner struct */
4393 p = xdr_encode_hyper(p, minor_id); /* Minor id */
4395 p = xdr_encode_opaque(p, major_id, major_id_sz);
4398 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
4400 /* Implementation id */
4401 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
4406 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4407 struct nfsd4_create_session *sess)
4409 struct xdr_stream *xdr = resp->xdr;
4412 p = xdr_reserve_space(xdr, 24);
4414 return nfserr_resource;
4415 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4416 NFS4_MAX_SESSIONID_LEN);
4417 *p++ = cpu_to_be32(sess->seqid);
4418 *p++ = cpu_to_be32(sess->flags);
4420 p = xdr_reserve_space(xdr, 28);
4422 return nfserr_resource;
4423 *p++ = cpu_to_be32(0); /* headerpadsz */
4424 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4425 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4426 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4427 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4428 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4429 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4431 if (sess->fore_channel.nr_rdma_attrs) {
4432 p = xdr_reserve_space(xdr, 4);
4434 return nfserr_resource;
4435 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4438 p = xdr_reserve_space(xdr, 28);
4440 return nfserr_resource;
4441 *p++ = cpu_to_be32(0); /* headerpadsz */
4442 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4443 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4444 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4445 *p++ = cpu_to_be32(sess->back_channel.maxops);
4446 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4447 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4449 if (sess->back_channel.nr_rdma_attrs) {
4450 p = xdr_reserve_space(xdr, 4);
4452 return nfserr_resource;
4453 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4459 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4460 struct nfsd4_sequence *seq)
4462 struct xdr_stream *xdr = resp->xdr;
4465 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4467 return nfserr_resource;
4468 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4469 NFS4_MAX_SESSIONID_LEN);
4470 *p++ = cpu_to_be32(seq->seqid);
4471 *p++ = cpu_to_be32(seq->slotid);
4472 /* Note slotid's are numbered from zero: */
4473 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4474 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4475 *p++ = cpu_to_be32(seq->status_flags);
4477 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4482 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4483 struct nfsd4_test_stateid *test_stateid)
4485 struct xdr_stream *xdr = resp->xdr;
4486 struct nfsd4_test_stateid_id *stateid, *next;
4489 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4491 return nfserr_resource;
4492 *p++ = htonl(test_stateid->ts_num_ids);
4494 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4495 *p++ = stateid->ts_id_status;
4501 #ifdef CONFIG_NFSD_PNFS
4503 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4504 struct nfsd4_getdeviceinfo *gdev)
4506 struct xdr_stream *xdr = resp->xdr;
4507 const struct nfsd4_layout_ops *ops;
4508 u32 starting_len = xdr->buf->len, needed_len;
4511 p = xdr_reserve_space(xdr, 4);
4513 return nfserr_resource;
4515 *p++ = cpu_to_be32(gdev->gd_layout_type);
4517 /* If maxcount is 0 then just update notifications */
4518 if (gdev->gd_maxcount != 0) {
4519 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4520 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4523 * We don't bother to burden the layout drivers with
4524 * enforcing gd_maxcount, just tell the client to
4525 * come back with a bigger buffer if it's not enough.
4527 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4533 if (gdev->gd_notify_types) {
4534 p = xdr_reserve_space(xdr, 4 + 4);
4536 return nfserr_resource;
4537 *p++ = cpu_to_be32(1); /* bitmap length */
4538 *p++ = cpu_to_be32(gdev->gd_notify_types);
4540 p = xdr_reserve_space(xdr, 4);
4542 return nfserr_resource;
4548 dprintk("%s: maxcount too small\n", __func__);
4549 needed_len = xdr->buf->len + 4 /* notifications */;
4550 xdr_truncate_encode(xdr, starting_len);
4551 p = xdr_reserve_space(xdr, 4);
4553 return nfserr_resource;
4554 *p++ = cpu_to_be32(needed_len);
4555 return nfserr_toosmall;
4559 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4560 struct nfsd4_layoutget *lgp)
4562 struct xdr_stream *xdr = resp->xdr;
4563 const struct nfsd4_layout_ops *ops;
4566 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4568 return nfserr_resource;
4570 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4571 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4572 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4573 sizeof(stateid_opaque_t));
4575 *p++ = cpu_to_be32(1); /* we always return a single layout */
4576 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4577 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4578 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4579 *p++ = cpu_to_be32(lgp->lg_layout_type);
4581 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4582 return ops->encode_layoutget(xdr, lgp);
4586 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4587 struct nfsd4_layoutcommit *lcp)
4589 struct xdr_stream *xdr = resp->xdr;
4592 p = xdr_reserve_space(xdr, 4);
4594 return nfserr_resource;
4595 *p++ = cpu_to_be32(lcp->lc_size_chg);
4596 if (lcp->lc_size_chg) {
4597 p = xdr_reserve_space(xdr, 8);
4599 return nfserr_resource;
4600 p = xdr_encode_hyper(p, lcp->lc_newsize);
4607 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4608 struct nfsd4_layoutreturn *lrp)
4610 struct xdr_stream *xdr = resp->xdr;
4613 p = xdr_reserve_space(xdr, 4);
4615 return nfserr_resource;
4616 *p++ = cpu_to_be32(lrp->lrs_present);
4617 if (lrp->lrs_present)
4618 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4621 #endif /* CONFIG_NFSD_PNFS */
4624 nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4625 struct nfsd42_write_res *write, bool sync)
4628 p = xdr_reserve_space(resp->xdr, 4);
4630 return nfserr_resource;
4633 *p++ = cpu_to_be32(0);
4636 *p++ = cpu_to_be32(1);
4637 nfserr = nfsd4_encode_stateid(resp->xdr, &write->cb_stateid);
4641 p = xdr_reserve_space(resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
4643 return nfserr_resource;
4645 p = xdr_encode_hyper(p, write->wr_bytes_written);
4646 *p++ = cpu_to_be32(write->wr_stable_how);
4647 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4648 NFS4_VERIFIER_SIZE);
4653 nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4655 struct xdr_stream *xdr = resp->xdr;
4656 struct nfs42_netaddr *addr;
4659 p = xdr_reserve_space(xdr, 4);
4660 *p++ = cpu_to_be32(ns->nl4_type);
4662 switch (ns->nl4_type) {
4664 addr = &ns->u.nl4_addr;
4666 /* netid_len, netid, uaddr_len, uaddr (port included
4667 * in RPCBIND_MAXUADDRLEN)
4669 p = xdr_reserve_space(xdr,
4671 (XDR_QUADLEN(addr->netid_len) * 4) +
4673 (XDR_QUADLEN(addr->addr_len) * 4));
4675 return nfserr_resource;
4677 *p++ = cpu_to_be32(addr->netid_len);
4678 p = xdr_encode_opaque_fixed(p, addr->netid,
4680 *p++ = cpu_to_be32(addr->addr_len);
4681 p = xdr_encode_opaque_fixed(p, addr->addr,
4685 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4686 return nfserr_inval;
4693 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4694 struct nfsd4_copy *copy)
4698 nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
4699 !!copy->cp_synchronous);
4703 p = xdr_reserve_space(resp->xdr, 4 + 4);
4704 *p++ = xdr_one; /* cr_consecutive */
4705 *p++ = cpu_to_be32(copy->cp_synchronous);
4710 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4711 struct nfsd4_offload_status *os)
4713 struct xdr_stream *xdr = resp->xdr;
4716 p = xdr_reserve_space(xdr, 8 + 4);
4718 return nfserr_resource;
4719 p = xdr_encode_hyper(p, os->count);
4720 *p++ = cpu_to_be32(0);
4725 nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4726 struct nfsd4_read *read,
4727 unsigned long *maxcount, u32 *eof,
4730 struct xdr_stream *xdr = resp->xdr;
4731 struct file *file = read->rd_nf->nf_file;
4732 int starting_len = xdr->buf->len;
4738 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4739 if (hole_pos > read->rd_offset)
4740 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4741 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
4743 /* Content type, offset, byte count */
4744 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4746 return nfserr_resource;
4748 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
4749 if (read->rd_vlen < 0)
4750 return nfserr_resource;
4752 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
4753 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
4756 xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
4758 tmp = htonl(NFS4_CONTENT_DATA);
4759 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4760 tmp64 = cpu_to_be64(read->rd_offset);
4761 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
4762 tmp = htonl(*maxcount);
4763 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
4766 write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
4767 xdr_pad_size(*maxcount));
4772 nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4773 struct nfsd4_read *read,
4774 unsigned long *maxcount, u32 *eof)
4776 struct file *file = read->rd_nf->nf_file;
4777 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
4778 loff_t f_size = i_size_read(file_inode(file));
4779 unsigned long count;
4782 if (data_pos == -ENXIO)
4784 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4785 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
4786 count = data_pos - read->rd_offset;
4788 /* Content type, offset, byte count */
4789 p = xdr_reserve_space(resp->xdr, 4 + 8 + 8);
4791 return nfserr_resource;
4793 *p++ = htonl(NFS4_CONTENT_HOLE);
4794 p = xdr_encode_hyper(p, read->rd_offset);
4795 p = xdr_encode_hyper(p, count);
4797 *eof = (read->rd_offset + count) >= f_size;
4798 *maxcount = min_t(unsigned long, count, *maxcount);
4803 nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4804 struct nfsd4_read *read)
4806 unsigned long maxcount, count;
4807 struct xdr_stream *xdr = resp->xdr;
4809 int starting_len = xdr->buf->len;
4810 int last_segment = xdr->buf->len;
4819 file = read->rd_nf->nf_file;
4821 /* eof flag, segment count */
4822 p = xdr_reserve_space(xdr, 4 + 4);
4824 return nfserr_resource;
4825 xdr_commit_encode(xdr);
4827 maxcount = min_t(unsigned long, read->rd_length,
4828 (xdr->buf->buflen - xdr->buf->len));
4831 eof = read->rd_offset >= i_size_read(file_inode(file));
4835 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4836 is_data = pos > read->rd_offset;
4838 while (count > 0 && !eof) {
4841 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4842 segments == 0 ? &pos : NULL);
4844 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
4848 read->rd_offset += maxcount;
4850 last_segment = xdr->buf->len;
4855 if (nfserr && segments == 0)
4856 xdr_truncate_encode(xdr, starting_len);
4859 xdr_truncate_encode(xdr, last_segment);
4864 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4865 tmp = htonl(segments);
4866 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
4873 nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4874 struct nfsd4_copy_notify *cn)
4876 struct xdr_stream *xdr = resp->xdr;
4883 p = xdr_reserve_space(xdr, 12);
4885 return nfserr_resource;
4887 /* cnr_lease_time */
4888 p = xdr_encode_hyper(p, cn->cpn_sec);
4889 *p++ = cpu_to_be32(cn->cpn_nsec);
4892 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4896 /* cnr_src.nl_nsvr */
4897 p = xdr_reserve_space(xdr, 4);
4899 return nfserr_resource;
4901 *p++ = cpu_to_be32(1);
4903 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4907 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4908 struct nfsd4_seek *seek)
4912 p = xdr_reserve_space(resp->xdr, 4 + 8);
4913 *p++ = cpu_to_be32(seek->seek_eof);
4914 p = xdr_encode_hyper(p, seek->seek_pos);
4920 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4926 * Encode kmalloc-ed buffer in to XDR stream.
4929 nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4934 cplen = min_t(unsigned long, buflen,
4935 ((void *)xdr->end - (void *)xdr->p));
4936 p = xdr_reserve_space(xdr, cplen);
4938 return nfserr_resource;
4940 memcpy(p, buf, cplen);
4945 cplen = min_t(u32, buflen, PAGE_SIZE);
4946 p = xdr_reserve_space(xdr, cplen);
4948 return nfserr_resource;
4950 memcpy(p, buf, cplen);
4952 if (cplen < PAGE_SIZE) {
4954 * We're done, with a length that wasn't page
4955 * aligned, so possibly not word aligned. Pad
4956 * any trailing bytes with 0.
4958 xdr_encode_opaque_fixed(p, NULL, cplen);
4962 buflen -= PAGE_SIZE;
4970 nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4971 struct nfsd4_getxattr *getxattr)
4973 struct xdr_stream *xdr = resp->xdr;
4976 p = xdr_reserve_space(xdr, 4);
4978 return nfserr_resource;
4980 *p = cpu_to_be32(getxattr->getxa_len);
4982 if (getxattr->getxa_len == 0)
4985 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
4986 getxattr->getxa_len);
4988 kvfree(getxattr->getxa_buf);
4994 nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4995 struct nfsd4_setxattr *setxattr)
4997 struct xdr_stream *xdr = resp->xdr;
5000 p = xdr_reserve_space(xdr, 20);
5002 return nfserr_resource;
5004 encode_cinfo(p, &setxattr->setxa_cinfo);
5010 * See if there are cookie values that can be rejected outright.
5013 nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5016 u64 cookie = listxattrs->lsxa_cookie;
5019 * If the cookie is larger than the maximum number we can fit
5020 * in either the buffer we just got back from vfs_listxattr, or,
5021 * XDR-encoded, in the return buffer, it's invalid.
5023 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5024 return nfserr_badcookie;
5026 if (cookie > (listxattrs->lsxa_maxcount /
5027 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5028 return nfserr_badcookie;
5030 *offsetp = (u32)cookie;
5035 nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5036 struct nfsd4_listxattrs *listxattrs)
5038 struct xdr_stream *xdr = resp->xdr;
5039 u32 cookie_offset, count_offset, eof;
5040 u32 left, xdrleft, slen, count;
5050 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5055 * Reserve space for the cookie and the name array count. Record
5056 * the offsets to save them later.
5058 cookie_offset = xdr->buf->len;
5059 count_offset = cookie_offset + 8;
5060 p = xdr_reserve_space(xdr, 12);
5062 status = nfserr_resource;
5067 left = listxattrs->lsxa_len;
5068 sp = listxattrs->lsxa_buf;
5071 xdrleft = listxattrs->lsxa_maxcount;
5073 while (left > 0 && xdrleft > 0) {
5077 * Check if this is a "user." attribute, skip it if not.
5079 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5082 slen -= XATTR_USER_PREFIX_LEN;
5083 xdrlen = 4 + ((slen + 3) & ~3);
5084 if (xdrlen > xdrleft) {
5087 * Can't even fit the first attribute name.
5089 status = nfserr_toosmall;
5096 left -= XATTR_USER_PREFIX_LEN;
5097 sp += XATTR_USER_PREFIX_LEN;
5098 if (nuser++ < offset)
5102 p = xdr_reserve_space(xdr, xdrlen);
5104 status = nfserr_resource;
5108 xdr_encode_opaque(p, sp, slen);
5118 * If there were user attributes to copy, but we didn't copy
5119 * any, the offset was too large (e.g. the cookie was invalid).
5121 if (nuser > 0 && count == 0) {
5122 status = nfserr_badcookie;
5127 p = xdr_reserve_space(xdr, 4);
5129 status = nfserr_resource;
5132 *p = cpu_to_be32(eof);
5134 cookie = offset + count;
5136 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
5137 tmp = cpu_to_be32(count);
5138 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
5140 if (listxattrs->lsxa_len)
5141 kvfree(listxattrs->lsxa_buf);
5146 nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5147 struct nfsd4_removexattr *removexattr)
5149 struct xdr_stream *xdr = resp->xdr;
5152 p = xdr_reserve_space(xdr, 20);
5154 return nfserr_resource;
5156 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5160 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5163 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5164 * since we don't need to filter out obsolete ops as this is
5165 * done in the decoding phase.
5167 static const nfsd4_enc nfsd4_enc_ops[] = {
5168 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5169 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5170 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5171 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5172 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5173 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5174 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5175 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5176 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5177 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5178 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5179 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5180 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5181 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5182 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5183 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
5184 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
5185 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5186 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5187 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5188 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5189 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5190 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5191 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5192 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5193 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5194 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5195 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5196 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5197 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5198 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5199 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5200 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5201 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5202 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5203 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5204 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
5206 /* NFSv4.1 operations */
5207 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
5208 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
5209 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5210 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
5211 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5212 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
5213 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5214 #ifdef CONFIG_NFSD_PNFS
5215 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5216 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5217 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5218 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5219 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5221 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5222 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5223 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5224 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5225 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5227 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
5228 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5229 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
5230 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
5231 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5232 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5233 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
5235 /* NFSv4.2 operations */
5236 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5237 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
5238 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
5239 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5240 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5241 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5242 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5243 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
5244 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
5245 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
5246 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
5247 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
5248 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
5250 /* RFC 8276 extended atributes operations */
5251 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5252 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5253 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5254 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
5258 * Calculate whether we still have space to encode repsize bytes.
5259 * There are two considerations:
5260 * - For NFS versions >=4.1, the size of the reply must stay within
5262 * - For all NFS versions, we must stay within limited preallocated
5265 * This is called before the operation is processed, so can only provide
5266 * an upper estimate. For some nonidempotent operations (such as
5267 * getattr), it's not necessarily a problem if that estimate is wrong,
5268 * as we can fail it after processing without significant side effects.
5270 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
5272 struct xdr_buf *buf = &resp->rqstp->rq_res;
5273 struct nfsd4_slot *slot = resp->cstate.slot;
5275 if (buf->len + respsize <= buf->buflen)
5277 if (!nfsd4_has_session(&resp->cstate))
5278 return nfserr_resource;
5279 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5281 return nfserr_rep_too_big_to_cache;
5283 return nfserr_rep_too_big;
5287 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5289 struct xdr_stream *xdr = resp->xdr;
5290 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5291 struct svc_rqst *rqstp = resp->rqstp;
5292 const struct nfsd4_operation *opdesc = op->opdesc;
5293 int post_err_offset;
5297 p = xdr_reserve_space(xdr, 8);
5302 *p++ = cpu_to_be32(op->opnum);
5303 post_err_offset = xdr->buf->len;
5305 if (op->opnum == OP_ILLEGAL)
5307 if (op->status && opdesc &&
5308 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5310 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
5311 !nfsd4_enc_ops[op->opnum]);
5312 encoder = nfsd4_enc_ops[op->opnum];
5313 op->status = encoder(resp, op->status, &op->u);
5315 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
5316 if (opdesc && opdesc->op_release)
5317 opdesc->op_release(&op->u);
5318 xdr_commit_encode(xdr);
5320 /* nfsd4_check_resp_size guarantees enough room for error status */
5322 int space_needed = 0;
5323 if (!nfsd4_last_compound_op(rqstp))
5324 space_needed = COMPOUND_ERR_SLACK_SPACE;
5325 op->status = nfsd4_check_resp_size(resp, space_needed);
5327 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5328 struct nfsd4_slot *slot = resp->cstate.slot;
5330 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5331 op->status = nfserr_rep_too_big_to_cache;
5333 op->status = nfserr_rep_too_big;
5335 if (op->status == nfserr_resource ||
5336 op->status == nfserr_rep_too_big ||
5337 op->status == nfserr_rep_too_big_to_cache) {
5339 * The operation may have already been encoded or
5340 * partially encoded. No op returns anything additional
5341 * in the case of one of these three errors, so we can
5342 * just truncate back to after the status. But it's a
5343 * bug if we had to do this on a non-idempotent op:
5345 warn_on_nonidempotent_op(op);
5346 xdr_truncate_encode(xdr, post_err_offset);
5349 int len = xdr->buf->len - post_err_offset;
5351 so->so_replay.rp_status = op->status;
5352 so->so_replay.rp_buflen = len;
5353 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5354 so->so_replay.rp_buf, len);
5357 /* Note that op->status is already in network byte order: */
5358 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
5362 * Encode the reply stored in the stateowner reply cache
5364 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5365 * previously sent already encoded operation.
5368 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
5371 struct nfs4_replay *rp = op->replay;
5373 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5378 *p++ = cpu_to_be32(op->opnum);
5379 *p++ = rp->rp_status; /* already xdr'ed */
5381 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
5384 void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
5386 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5388 if (args->ops != args->iops) {
5390 args->ops = args->iops;
5392 while (args->to_free) {
5393 struct svcxdr_tmpbuf *tb = args->to_free;
5394 args->to_free = tb->next;
5400 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
5402 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5404 /* svcxdr_tmp_alloc */
5405 args->to_free = NULL;
5408 args->ops = args->iops;
5409 args->rqstp = rqstp;
5411 return nfsd4_decode_compound(args);
5415 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
5417 struct nfsd4_compoundres *resp = rqstp->rq_resp;
5418 struct xdr_buf *buf = xdr->buf;
5421 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5422 buf->tail[0].iov_len);
5425 * Send buffer space for the following items is reserved
5426 * at the top of nfsd4_proc_compound().
5430 *p++ = resp->cstate.status;
5432 rqstp->rq_next_page = xdr->page_ptr + 1;
5434 *p++ = htonl(resp->taglen);
5435 memcpy(p, resp->tag, resp->taglen);
5436 p += XDR_QUADLEN(resp->taglen);
5437 *p++ = htonl(resp->opcnt);
5439 nfsd4_sequence_done(resp);