2 * Server-side XDR for NFSv4
4 * Copyright (c) 2002 The Regents of the University of Michigan.
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 <linux/vmalloc.h>
47 #include <uapi/linux/xattr.h>
57 #include "filecache.h"
61 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
62 #include <linux/security.h>
66 #define NFSDDBG_FACILITY NFSDDBG_XDR
68 const u32 nfsd_suppattrs[3][3] = {
69 {NFSD4_SUPPORTED_ATTRS_WORD0,
70 NFSD4_SUPPORTED_ATTRS_WORD1,
71 NFSD4_SUPPORTED_ATTRS_WORD2},
73 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
74 NFSD4_1_SUPPORTED_ATTRS_WORD1,
75 NFSD4_1_SUPPORTED_ATTRS_WORD2},
77 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
78 NFSD4_1_SUPPORTED_ATTRS_WORD1,
79 NFSD4_2_SUPPORTED_ATTRS_WORD2},
83 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
84 * directory in order to indicate to the client that a filesystem boundary is present
85 * We use a fixed fsid for a referral
87 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
88 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
91 check_filename(char *str, int len)
97 if (len > NFS4_MAXNAMLEN)
98 return nfserr_nametoolong;
99 if (isdotent(str, len))
100 return nfserr_badname;
101 for (i = 0; i < len; i++)
103 return nfserr_badname;
107 static int zero_clientid(clientid_t *clid)
109 return (clid->cl_boot == 0) && (clid->cl_id == 0);
113 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
114 * @argp: NFSv4 compound argument structure
115 * @len: length of buffer to allocate
117 * Allocates a buffer of size @len to be freed when processing the compound
118 * operation described in @argp finishes.
121 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
123 struct svcxdr_tmpbuf *tb;
125 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
128 tb->next = argp->to_free;
134 * For xdr strings that need to be passed to other kernel api's
135 * as null-terminated strings.
137 * Note null-terminating in place usually isn't safe since the
138 * buffer might end on a page boundary.
141 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
143 char *p = svcxdr_tmpalloc(argp, len + 1);
153 svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len)
158 * The location of the decoded data item is stable,
159 * so @p is OK to use. This is the common case.
161 if (p != argp->xdr->scratch.iov_base)
164 tmp = svcxdr_tmpalloc(argp, len);
172 * NFSv4 basic data type decoders
176 * This helper handles variable-length opaques which belong to protocol
177 * elements that this implementation does not support.
180 nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen)
184 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
185 return nfserr_bad_xdr;
186 if (maxlen && len > maxlen)
187 return nfserr_bad_xdr;
188 if (!xdr_inline_decode(argp->xdr, len))
189 return nfserr_bad_xdr;
195 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
200 if (xdr_stream_decode_u32(argp->xdr, &len) < 0)
201 return nfserr_bad_xdr;
202 if (len == 0 || len > NFS4_OPAQUE_LIMIT)
203 return nfserr_bad_xdr;
204 p = xdr_inline_decode(argp->xdr, len);
206 return nfserr_bad_xdr;
207 o->data = svcxdr_savemem(argp, p, len);
209 return nfserr_jukebox;
216 nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp)
220 if (xdr_stream_decode_u32(argp->xdr, lenp) < 0)
221 return nfserr_bad_xdr;
222 p = xdr_inline_decode(argp->xdr, *lenp);
224 return nfserr_bad_xdr;
225 status = check_filename((char *)p, *lenp);
228 *namp = svcxdr_savemem(argp, p, *lenp);
230 return nfserr_jukebox;
236 nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
240 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3);
242 return nfserr_bad_xdr;
243 p = xdr_decode_hyper(p, &tv->tv_sec);
244 tv->tv_nsec = be32_to_cpup(p++);
245 if (tv->tv_nsec >= (u32)1000000000)
251 nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf)
255 p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE);
257 return nfserr_bad_xdr;
258 memcpy(verf->data, p, sizeof(verf->data));
263 * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4
264 * @argp: NFSv4 compound argument structure
265 * @bmval: pointer to an array of u32's to decode into
266 * @bmlen: size of the @bmval array
268 * The server needs to return nfs_ok rather than nfserr_bad_xdr when
269 * encountering bitmaps containing bits it does not recognize. This
270 * includes bits in bitmap words past WORDn, where WORDn is the last
271 * bitmap WORD the implementation currently supports. Thus we are
272 * careful here to simply ignore bits in bitmap words that this
273 * implementation has yet to support explicitly.
276 * %nfs_ok: @bmval populated successfully
277 * %nfserr_bad_xdr: the encoded bitmap was invalid
280 nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen)
284 status = xdr_stream_decode_uint32_array(argp->xdr, bmval, bmlen);
285 return status == -EBADMSG ? nfserr_bad_xdr : nfs_ok;
289 nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace)
294 if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0)
295 return nfserr_bad_xdr;
296 if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0)
297 return nfserr_bad_xdr;
298 if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0)
299 return nfserr_bad_xdr;
301 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
302 return nfserr_bad_xdr;
303 p = xdr_inline_decode(argp->xdr, length);
305 return nfserr_bad_xdr;
306 ace->whotype = nfs4_acl_get_whotype((char *)p, length);
307 if (ace->whotype != NFS4_ACL_WHO_NAMED)
309 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
310 status = nfsd_map_name_to_gid(argp->rqstp,
311 (char *)p, length, &ace->who_gid);
313 status = nfsd_map_name_to_uid(argp->rqstp,
314 (char *)p, length, &ace->who_uid);
319 /* A counted array of nfsace4's */
320 static noinline __be32
321 nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl)
323 struct nfs4_ace *ace;
327 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
328 return nfserr_bad_xdr;
330 if (count > xdr_stream_remaining(argp->xdr) / 20)
332 * Even with 4-byte names there wouldn't be
333 * space for that many aces; something fishy is
338 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count));
340 return nfserr_jukebox;
342 (*acl)->naces = count;
343 for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) {
344 status = nfsd4_decode_nfsace4(argp, ace);
352 static noinline __be32
353 nfsd4_decode_security_label(struct nfsd4_compoundargs *argp,
354 struct xdr_netobj *label)
359 if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0)
360 return nfserr_bad_xdr;
361 if (xdr_stream_decode_u32(argp->xdr, &pi) < 0)
362 return nfserr_bad_xdr;
364 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
365 return nfserr_bad_xdr;
366 if (length > NFS4_MAXLABELLEN)
367 return nfserr_badlabel;
368 p = xdr_inline_decode(argp->xdr, length);
370 return nfserr_bad_xdr;
372 label->data = svcxdr_dupstr(argp, p, length);
374 return nfserr_jukebox;
380 nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
381 struct iattr *iattr, struct nfs4_acl **acl,
382 struct xdr_netobj *label, int *umask)
384 unsigned int starting_pos;
389 status = nfsd4_decode_bitmap4(argp, bmval, bmlen);
391 return nfserr_bad_xdr;
393 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
394 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
395 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
396 if (nfsd_attrs_supported(argp->minorversion, bmval))
398 return nfserr_attrnotsupp;
401 if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0)
402 return nfserr_bad_xdr;
403 starting_pos = xdr_stream_pos(argp->xdr);
405 if (bmval[0] & FATTR4_WORD0_SIZE) {
408 if (xdr_stream_decode_u64(argp->xdr, &size) < 0)
409 return nfserr_bad_xdr;
410 iattr->ia_size = size;
411 iattr->ia_valid |= ATTR_SIZE;
413 if (bmval[0] & FATTR4_WORD0_ACL) {
414 status = nfsd4_decode_acl(argp, acl);
419 if (bmval[1] & FATTR4_WORD1_MODE) {
422 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
423 return nfserr_bad_xdr;
424 iattr->ia_mode = mode;
425 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
426 iattr->ia_valid |= ATTR_MODE;
428 if (bmval[1] & FATTR4_WORD1_OWNER) {
431 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
432 return nfserr_bad_xdr;
433 p = xdr_inline_decode(argp->xdr, length);
435 return nfserr_bad_xdr;
436 status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length,
440 iattr->ia_valid |= ATTR_UID;
442 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
445 if (xdr_stream_decode_u32(argp->xdr, &length) < 0)
446 return nfserr_bad_xdr;
447 p = xdr_inline_decode(argp->xdr, length);
449 return nfserr_bad_xdr;
450 status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length,
454 iattr->ia_valid |= ATTR_GID;
456 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
459 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
460 return nfserr_bad_xdr;
462 case NFS4_SET_TO_CLIENT_TIME:
463 status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime);
466 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
468 case NFS4_SET_TO_SERVER_TIME:
469 iattr->ia_valid |= ATTR_ATIME;
472 return nfserr_bad_xdr;
475 if (bmval[1] & FATTR4_WORD1_TIME_CREATE) {
476 struct timespec64 ts;
478 /* No Linux filesystem supports setting this attribute. */
479 bmval[1] &= ~FATTR4_WORD1_TIME_CREATE;
480 status = nfsd4_decode_nfstime4(argp, &ts);
484 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
487 if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0)
488 return nfserr_bad_xdr;
490 case NFS4_SET_TO_CLIENT_TIME:
491 status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime);
494 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
496 case NFS4_SET_TO_SERVER_TIME:
497 iattr->ia_valid |= ATTR_MTIME;
500 return nfserr_bad_xdr;
504 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
505 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
506 status = nfsd4_decode_security_label(argp, label);
510 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
514 return nfserr_bad_xdr;
515 if (xdr_stream_decode_u32(argp->xdr, &mode) < 0)
516 return nfserr_bad_xdr;
517 iattr->ia_mode = mode & (S_IFMT | S_IALLUGO);
518 if (xdr_stream_decode_u32(argp->xdr, &mask) < 0)
519 return nfserr_bad_xdr;
520 *umask = mask & S_IRWXUGO;
521 iattr->ia_valid |= ATTR_MODE;
524 /* request sanity: did attrlist4 contain the expected number of words? */
525 if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)
526 return nfserr_bad_xdr;
532 nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid)
536 p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE);
538 return nfserr_bad_xdr;
539 sid->si_generation = be32_to_cpup(p++);
540 memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque));
545 nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid)
549 p = xdr_inline_decode(argp->xdr, sizeof(__be64));
551 return nfserr_bad_xdr;
552 memcpy(clientid, p, sizeof(*clientid));
557 nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp,
558 clientid_t *clientid, struct xdr_netobj *owner)
562 status = nfsd4_decode_clientid4(argp, clientid);
565 return nfsd4_decode_opaque(argp, owner);
568 #ifdef CONFIG_NFSD_PNFS
570 nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp,
571 struct nfsd4_deviceid *devid)
575 p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE);
577 return nfserr_bad_xdr;
578 memcpy(devid, p, sizeof(*devid));
583 nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp,
584 struct nfsd4_layoutcommit *lcp)
586 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0)
587 return nfserr_bad_xdr;
588 if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES)
589 return nfserr_bad_xdr;
590 if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX)
591 return nfserr_bad_xdr;
593 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0)
594 return nfserr_bad_xdr;
595 if (lcp->lc_up_len > 0) {
596 lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len);
597 if (!lcp->lc_up_layout)
598 return nfserr_bad_xdr;
605 nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp,
606 struct nfsd4_layoutreturn *lrp)
610 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0)
611 return nfserr_bad_xdr;
612 switch (lrp->lr_return_type) {
614 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0)
615 return nfserr_bad_xdr;
616 if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0)
617 return nfserr_bad_xdr;
618 status = nfsd4_decode_stateid4(argp, &lrp->lr_sid);
621 if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0)
622 return nfserr_bad_xdr;
623 if (lrp->lrf_body_len > 0) {
624 lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len);
626 return nfserr_bad_xdr;
631 lrp->lr_seg.offset = 0;
632 lrp->lr_seg.length = NFS4_MAX_UINT64;
635 return nfserr_bad_xdr;
641 #endif /* CONFIG_NFSD_PNFS */
644 nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp,
645 struct nfs4_sessionid *sessionid)
649 p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN);
651 return nfserr_bad_xdr;
652 memcpy(sessionid->data, p, sizeof(sessionid->data));
656 /* Defined in Appendix A of RFC 5531 */
658 nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp,
659 struct nfsd4_cb_sec *cbs)
661 u32 stamp, gidcount, uid, gid;
664 if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0)
665 return nfserr_bad_xdr;
667 status = nfsd4_decode_ignored_string(argp, 255);
670 if (xdr_stream_decode_u32(argp->xdr, &uid) < 0)
671 return nfserr_bad_xdr;
672 if (xdr_stream_decode_u32(argp->xdr, &gid) < 0)
673 return nfserr_bad_xdr;
674 if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0)
675 return nfserr_bad_xdr;
677 return nfserr_bad_xdr;
678 p = xdr_inline_decode(argp->xdr, gidcount << 2);
680 return nfserr_bad_xdr;
681 if (cbs->flavor == (u32)(-1)) {
682 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
684 kuid_t kuid = make_kuid(userns, uid);
685 kgid_t kgid = make_kgid(userns, gid);
686 if (uid_valid(kuid) && gid_valid(kgid)) {
689 cbs->flavor = RPC_AUTH_UNIX;
691 dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n");
699 nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp,
700 struct nfsd4_cb_sec *cbs)
705 dprintk("RPC_AUTH_GSS callback secflavor not supported!\n");
707 if (xdr_stream_decode_u32(argp->xdr, &service) < 0)
708 return nfserr_bad_xdr;
709 if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY)
710 return nfserr_bad_xdr;
711 /* gcbp_handle_from_server */
712 status = nfsd4_decode_ignored_string(argp, 0);
715 /* gcbp_handle_from_client */
716 status = nfsd4_decode_ignored_string(argp, 0);
723 /* a counted array of callback_sec_parms4 items */
725 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
727 u32 i, secflavor, nr_secflavs;
730 /* callback_sec_params4 */
731 if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0)
732 return nfserr_bad_xdr;
734 cbs->flavor = (u32)(-1);
736 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
739 for (i = 0; i < nr_secflavs; ++i) {
740 if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0)
741 return nfserr_bad_xdr;
745 if (cbs->flavor == (u32)(-1))
746 cbs->flavor = RPC_AUTH_NULL;
749 status = nfsd4_decode_authsys_parms(argp, cbs);
754 status = nfsd4_decode_gss_cb_handles4(argp, cbs);
768 * NFSv4 operation argument decoders
772 nfsd4_decode_access(struct nfsd4_compoundargs *argp,
775 struct nfsd4_access *access = &u->access;
776 if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0)
777 return nfserr_bad_xdr;
782 nfsd4_decode_close(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
784 struct nfsd4_close *close = &u->close;
785 if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0)
786 return nfserr_bad_xdr;
787 return nfsd4_decode_stateid4(argp, &close->cl_stateid);
792 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
794 struct nfsd4_commit *commit = &u->commit;
795 if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0)
796 return nfserr_bad_xdr;
797 if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0)
798 return nfserr_bad_xdr;
799 memset(&commit->co_verf, 0, sizeof(commit->co_verf));
804 nfsd4_decode_create(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
806 struct nfsd4_create *create = &u->create;
809 memset(create, 0, sizeof(*create));
810 if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0)
811 return nfserr_bad_xdr;
812 switch (create->cr_type) {
814 if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0)
815 return nfserr_bad_xdr;
816 p = xdr_inline_decode(argp->xdr, create->cr_datalen);
818 return nfserr_bad_xdr;
819 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
820 if (!create->cr_data)
821 return nfserr_jukebox;
825 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0)
826 return nfserr_bad_xdr;
827 if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0)
828 return nfserr_bad_xdr;
836 status = nfsd4_decode_component4(argp, &create->cr_name,
837 &create->cr_namelen);
840 status = nfsd4_decode_fattr4(argp, create->cr_bmval,
841 ARRAY_SIZE(create->cr_bmval),
842 &create->cr_iattr, &create->cr_acl,
843 &create->cr_label, &create->cr_umask);
851 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
853 struct nfsd4_delegreturn *dr = &u->delegreturn;
854 return nfsd4_decode_stateid4(argp, &dr->dr_stateid);
858 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
860 struct nfsd4_getattr *getattr = &u->getattr;
861 memset(getattr, 0, sizeof(*getattr));
862 return nfsd4_decode_bitmap4(argp, getattr->ga_bmval,
863 ARRAY_SIZE(getattr->ga_bmval));
867 nfsd4_decode_link(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
869 struct nfsd4_link *link = &u->link;
870 memset(link, 0, sizeof(*link));
871 return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen);
875 nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp,
876 struct nfsd4_lock *lock)
880 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0)
881 return nfserr_bad_xdr;
882 status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid);
885 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0)
886 return nfserr_bad_xdr;
887 return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid,
888 &lock->lk_new_owner);
892 nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp,
893 struct nfsd4_lock *lock)
897 status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid);
900 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0)
901 return nfserr_bad_xdr;
907 nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
909 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0)
910 return nfserr_bad_xdr;
912 return nfsd4_decode_open_to_lock_owner4(argp, lock);
913 return nfsd4_decode_exist_lock_owner4(argp, lock);
917 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
919 struct nfsd4_lock *lock = &u->lock;
920 memset(lock, 0, sizeof(*lock));
921 if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0)
922 return nfserr_bad_xdr;
923 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
924 return nfserr_bad_xdr;
925 if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0)
926 return nfserr_bad_xdr;
927 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0)
928 return nfserr_bad_xdr;
929 if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0)
930 return nfserr_bad_xdr;
931 return nfsd4_decode_locker4(argp, lock);
935 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
937 struct nfsd4_lockt *lockt = &u->lockt;
938 memset(lockt, 0, sizeof(*lockt));
939 if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0)
940 return nfserr_bad_xdr;
941 if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
942 return nfserr_bad_xdr;
943 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0)
944 return nfserr_bad_xdr;
945 if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0)
946 return nfserr_bad_xdr;
947 return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid,
952 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
954 struct nfsd4_locku *locku = &u->locku;
957 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0)
958 return nfserr_bad_xdr;
959 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
960 return nfserr_bad_xdr;
961 if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0)
962 return nfserr_bad_xdr;
963 status = nfsd4_decode_stateid4(argp, &locku->lu_stateid);
966 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0)
967 return nfserr_bad_xdr;
968 if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0)
969 return nfserr_bad_xdr;
975 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
977 struct nfsd4_lookup *lookup = &u->lookup;
978 return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len);
982 nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
986 if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0)
987 return nfserr_bad_xdr;
988 switch (open->op_createmode) {
989 case NFS4_CREATE_UNCHECKED:
990 case NFS4_CREATE_GUARDED:
991 status = nfsd4_decode_fattr4(argp, open->op_bmval,
992 ARRAY_SIZE(open->op_bmval),
993 &open->op_iattr, &open->op_acl,
994 &open->op_label, &open->op_umask);
998 case NFS4_CREATE_EXCLUSIVE:
999 status = nfsd4_decode_verifier4(argp, &open->op_verf);
1003 case NFS4_CREATE_EXCLUSIVE4_1:
1004 if (argp->minorversion < 1)
1005 return nfserr_bad_xdr;
1006 status = nfsd4_decode_verifier4(argp, &open->op_verf);
1009 status = nfsd4_decode_fattr4(argp, open->op_bmval,
1010 ARRAY_SIZE(open->op_bmval),
1011 &open->op_iattr, &open->op_acl,
1012 &open->op_label, &open->op_umask);
1017 return nfserr_bad_xdr;
1024 nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
1028 if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0)
1029 return nfserr_bad_xdr;
1030 switch (open->op_create) {
1031 case NFS4_OPEN_NOCREATE:
1033 case NFS4_OPEN_CREATE:
1034 status = nfsd4_decode_createhow4(argp, open);
1039 return nfserr_bad_xdr;
1045 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
1049 if (xdr_stream_decode_u32(argp->xdr, &w) < 0)
1050 return nfserr_bad_xdr;
1051 *share_access = w & NFS4_SHARE_ACCESS_MASK;
1052 *deleg_want = w & NFS4_SHARE_WANT_MASK;
1054 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
1056 switch (w & NFS4_SHARE_ACCESS_MASK) {
1057 case NFS4_SHARE_ACCESS_READ:
1058 case NFS4_SHARE_ACCESS_WRITE:
1059 case NFS4_SHARE_ACCESS_BOTH:
1062 return nfserr_bad_xdr;
1064 w &= ~NFS4_SHARE_ACCESS_MASK;
1067 if (!argp->minorversion)
1068 return nfserr_bad_xdr;
1069 switch (w & NFS4_SHARE_WANT_MASK) {
1070 case NFS4_SHARE_WANT_NO_PREFERENCE:
1071 case NFS4_SHARE_WANT_READ_DELEG:
1072 case NFS4_SHARE_WANT_WRITE_DELEG:
1073 case NFS4_SHARE_WANT_ANY_DELEG:
1074 case NFS4_SHARE_WANT_NO_DELEG:
1075 case NFS4_SHARE_WANT_CANCEL:
1078 return nfserr_bad_xdr;
1080 w &= ~NFS4_SHARE_WANT_MASK;
1084 if (!deleg_when) /* open_downgrade */
1085 return nfserr_inval;
1087 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
1088 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
1089 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
1090 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
1093 return nfserr_bad_xdr;
1096 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
1098 if (xdr_stream_decode_u32(argp->xdr, x) < 0)
1099 return nfserr_bad_xdr;
1100 /* Note: unlike access bits, deny bits may be zero. */
1101 if (*x & ~NFS4_SHARE_DENY_BOTH)
1102 return nfserr_bad_xdr;
1108 nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp,
1109 struct nfsd4_open *open)
1113 if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0)
1114 return nfserr_bad_xdr;
1115 switch (open->op_claim_type) {
1116 case NFS4_OPEN_CLAIM_NULL:
1117 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1118 status = nfsd4_decode_component4(argp, &open->op_fname,
1119 &open->op_fnamelen);
1123 case NFS4_OPEN_CLAIM_PREVIOUS:
1124 if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0)
1125 return nfserr_bad_xdr;
1127 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1128 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1131 status = nfsd4_decode_component4(argp, &open->op_fname,
1132 &open->op_fnamelen);
1136 case NFS4_OPEN_CLAIM_FH:
1137 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1138 if (argp->minorversion < 1)
1139 return nfserr_bad_xdr;
1142 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1143 if (argp->minorversion < 1)
1144 return nfserr_bad_xdr;
1145 status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid);
1150 return nfserr_bad_xdr;
1157 nfsd4_decode_open(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1159 struct nfsd4_open *open = &u->open;
1163 memset(open, 0, sizeof(*open));
1165 if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0)
1166 return nfserr_bad_xdr;
1167 /* deleg_want is ignored */
1168 status = nfsd4_decode_share_access(argp, &open->op_share_access,
1169 &open->op_deleg_want, &dummy);
1172 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
1175 status = nfsd4_decode_state_owner4(argp, &open->op_clientid,
1179 status = nfsd4_decode_openflag4(argp, open);
1182 return nfsd4_decode_open_claim4(argp, open);
1186 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp,
1187 union nfsd4_op_u *u)
1189 struct nfsd4_open_confirm *open_conf = &u->open_confirm;
1192 if (argp->minorversion >= 1)
1193 return nfserr_notsupp;
1195 status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid);
1198 if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0)
1199 return nfserr_bad_xdr;
1201 memset(&open_conf->oc_resp_stateid, 0,
1202 sizeof(open_conf->oc_resp_stateid));
1207 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp,
1208 union nfsd4_op_u *u)
1210 struct nfsd4_open_downgrade *open_down = &u->open_downgrade;
1213 memset(open_down, 0, sizeof(*open_down));
1214 status = nfsd4_decode_stateid4(argp, &open_down->od_stateid);
1217 if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0)
1218 return nfserr_bad_xdr;
1219 /* deleg_want is ignored */
1220 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1221 &open_down->od_deleg_want, NULL);
1224 return nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1228 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1230 struct nfsd4_putfh *putfh = &u->putfh;
1233 if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0)
1234 return nfserr_bad_xdr;
1235 if (putfh->pf_fhlen > NFS4_FHSIZE)
1236 return nfserr_bad_xdr;
1237 p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen);
1239 return nfserr_bad_xdr;
1240 putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen);
1241 if (!putfh->pf_fhval)
1242 return nfserr_jukebox;
1244 putfh->no_verify = false;
1249 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
1251 if (argp->minorversion == 0)
1253 return nfserr_notsupp;
1257 nfsd4_decode_read(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1259 struct nfsd4_read *read = &u->read;
1262 memset(read, 0, sizeof(*read));
1263 status = nfsd4_decode_stateid4(argp, &read->rd_stateid);
1266 if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0)
1267 return nfserr_bad_xdr;
1268 if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0)
1269 return nfserr_bad_xdr;
1275 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1277 struct nfsd4_readdir *readdir = &u->readdir;
1280 memset(readdir, 0, sizeof(*readdir));
1281 if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0)
1282 return nfserr_bad_xdr;
1283 status = nfsd4_decode_verifier4(argp, &readdir->rd_verf);
1286 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0)
1287 return nfserr_bad_xdr;
1288 if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0)
1289 return nfserr_bad_xdr;
1290 if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval,
1291 ARRAY_SIZE(readdir->rd_bmval)) < 0)
1292 return nfserr_bad_xdr;
1298 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1300 struct nfsd4_remove *remove = &u->remove;
1301 memset(&remove->rm_cinfo, 0, sizeof(remove->rm_cinfo));
1302 return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen);
1306 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1308 struct nfsd4_rename *rename = &u->rename;
1311 memset(rename, 0, sizeof(*rename));
1312 status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen);
1315 return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen);
1319 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1321 clientid_t *clientid = &u->renew;
1322 return nfsd4_decode_clientid4(argp, clientid);
1326 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1327 union nfsd4_op_u *u)
1329 struct nfsd4_secinfo *secinfo = &u->secinfo;
1330 secinfo->si_exp = NULL;
1331 return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen);
1335 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1337 struct nfsd4_setattr *setattr = &u->setattr;
1340 memset(setattr, 0, sizeof(*setattr));
1341 status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid);
1344 return nfsd4_decode_fattr4(argp, setattr->sa_bmval,
1345 ARRAY_SIZE(setattr->sa_bmval),
1346 &setattr->sa_iattr, &setattr->sa_acl,
1347 &setattr->sa_label, NULL);
1351 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1353 struct nfsd4_setclientid *setclientid = &u->setclientid;
1356 memset(setclientid, 0, sizeof(*setclientid));
1358 if (argp->minorversion >= 1)
1359 return nfserr_notsupp;
1361 status = nfsd4_decode_verifier4(argp, &setclientid->se_verf);
1364 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1367 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0)
1368 return nfserr_bad_xdr;
1369 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0)
1370 return nfserr_bad_xdr;
1371 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len);
1373 return nfserr_bad_xdr;
1374 setclientid->se_callback_netid_val = svcxdr_savemem(argp, p,
1375 setclientid->se_callback_netid_len);
1376 if (!setclientid->se_callback_netid_val)
1377 return nfserr_jukebox;
1379 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0)
1380 return nfserr_bad_xdr;
1381 p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len);
1383 return nfserr_bad_xdr;
1384 setclientid->se_callback_addr_val = svcxdr_savemem(argp, p,
1385 setclientid->se_callback_addr_len);
1386 if (!setclientid->se_callback_addr_val)
1387 return nfserr_jukebox;
1388 if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0)
1389 return nfserr_bad_xdr;
1395 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp,
1396 union nfsd4_op_u *u)
1398 struct nfsd4_setclientid_confirm *scd_c = &u->setclientid_confirm;
1401 if (argp->minorversion >= 1)
1402 return nfserr_notsupp;
1404 status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid);
1407 return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm);
1410 /* Also used for NVERIFY */
1412 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1414 struct nfsd4_verify *verify = &u->verify;
1417 memset(verify, 0, sizeof(*verify));
1419 status = nfsd4_decode_bitmap4(argp, verify->ve_bmval,
1420 ARRAY_SIZE(verify->ve_bmval));
1424 /* For convenience's sake, we compare raw xdr'd attributes in
1425 * nfsd4_proc_verify */
1427 if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0)
1428 return nfserr_bad_xdr;
1429 p = xdr_inline_decode(argp->xdr, verify->ve_attrlen);
1431 return nfserr_bad_xdr;
1432 verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen);
1433 if (!verify->ve_attrval)
1434 return nfserr_jukebox;
1440 nfsd4_decode_write(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1442 struct nfsd4_write *write = &u->write;
1445 status = nfsd4_decode_stateid4(argp, &write->wr_stateid);
1448 if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0)
1449 return nfserr_bad_xdr;
1450 if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0)
1451 return nfserr_bad_xdr;
1452 if (write->wr_stable_how > NFS_FILE_SYNC)
1453 return nfserr_bad_xdr;
1454 if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0)
1455 return nfserr_bad_xdr;
1456 if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen))
1457 return nfserr_bad_xdr;
1459 write->wr_bytes_written = 0;
1460 write->wr_how_written = 0;
1461 memset(&write->wr_verifier, 0, sizeof(write->wr_verifier));
1466 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp,
1467 union nfsd4_op_u *u)
1469 struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner;
1472 if (argp->minorversion >= 1)
1473 return nfserr_notsupp;
1475 status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid,
1476 &rlockowner->rl_owner);
1480 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1481 return nfserr_inval;
1486 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp,
1487 union nfsd4_op_u *u)
1489 struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl;
1490 memset(bc, 0, sizeof(*bc));
1491 if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0)
1492 return nfserr_bad_xdr;
1493 return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
1496 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp,
1497 union nfsd4_op_u *u)
1499 struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
1500 u32 use_conn_in_rdma_mode;
1503 memset(bcts, 0, sizeof(*bcts));
1504 status = nfsd4_decode_sessionid4(argp, &bcts->sessionid);
1507 if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0)
1508 return nfserr_bad_xdr;
1509 if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0)
1510 return nfserr_bad_xdr;
1516 nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp,
1517 struct nfsd4_exchange_id *exid)
1521 status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce,
1522 ARRAY_SIZE(exid->spo_must_enforce));
1524 return nfserr_bad_xdr;
1525 status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow,
1526 ARRAY_SIZE(exid->spo_must_allow));
1528 return nfserr_bad_xdr;
1534 * This implementation currently does not support SP4_SSV.
1535 * This decoder simply skips over these arguments.
1537 static noinline __be32
1538 nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp,
1539 struct nfsd4_exchange_id *exid)
1541 u32 count, window, num_gss_handles;
1545 status = nfsd4_decode_state_protect_ops(argp, exid);
1549 /* ssp_hash_algs<> */
1550 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1551 return nfserr_bad_xdr;
1553 status = nfsd4_decode_ignored_string(argp, 0);
1558 /* ssp_encr_algs<> */
1559 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1560 return nfserr_bad_xdr;
1562 status = nfsd4_decode_ignored_string(argp, 0);
1567 if (xdr_stream_decode_u32(argp->xdr, &window) < 0)
1568 return nfserr_bad_xdr;
1569 if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0)
1570 return nfserr_bad_xdr;
1576 nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp,
1577 struct nfsd4_exchange_id *exid)
1581 if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0)
1582 return nfserr_bad_xdr;
1583 switch (exid->spa_how) {
1587 status = nfsd4_decode_state_protect_ops(argp, exid);
1592 status = nfsd4_decode_ssv_sp_parms(argp, exid);
1597 return nfserr_bad_xdr;
1604 nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp,
1605 struct nfsd4_exchange_id *exid)
1610 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
1611 return nfserr_bad_xdr;
1616 /* Note that RFC 8881 places no length limit on
1617 * nii_domain, but this implementation permits no
1618 * more than NFS4_OPAQUE_LIMIT bytes */
1619 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1622 /* Note that RFC 8881 places no length limit on
1623 * nii_name, but this implementation permits no
1624 * more than NFS4_OPAQUE_LIMIT bytes */
1625 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1628 status = nfsd4_decode_nfstime4(argp, &exid->nii_time);
1633 return nfserr_bad_xdr;
1640 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1641 union nfsd4_op_u *u)
1643 struct nfsd4_exchange_id *exid = &u->exchange_id;
1646 memset(exid, 0, sizeof(*exid));
1647 status = nfsd4_decode_verifier4(argp, &exid->verifier);
1650 status = nfsd4_decode_opaque(argp, &exid->clname);
1653 if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0)
1654 return nfserr_bad_xdr;
1655 status = nfsd4_decode_state_protect4_a(argp, exid);
1658 return nfsd4_decode_nfs_impl_id4(argp, exid);
1662 nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp,
1663 struct nfsd4_channel_attrs *ca)
1667 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7);
1669 return nfserr_bad_xdr;
1671 /* headerpadsz is ignored */
1673 ca->maxreq_sz = be32_to_cpup(p++);
1674 ca->maxresp_sz = be32_to_cpup(p++);
1675 ca->maxresp_cached = be32_to_cpup(p++);
1676 ca->maxops = be32_to_cpup(p++);
1677 ca->maxreqs = be32_to_cpup(p++);
1678 ca->nr_rdma_attrs = be32_to_cpup(p);
1679 switch (ca->nr_rdma_attrs) {
1683 if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0)
1684 return nfserr_bad_xdr;
1687 return nfserr_bad_xdr;
1694 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1695 union nfsd4_op_u *u)
1697 struct nfsd4_create_session *sess = &u->create_session;
1700 memset(sess, 0, sizeof(*sess));
1701 status = nfsd4_decode_clientid4(argp, &sess->clientid);
1704 if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0)
1705 return nfserr_bad_xdr;
1706 if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0)
1707 return nfserr_bad_xdr;
1708 status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel);
1711 status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel);
1714 if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0)
1715 return nfserr_bad_xdr;
1716 return nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1720 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1721 union nfsd4_op_u *u)
1723 struct nfsd4_destroy_session *destroy_session = &u->destroy_session;
1724 return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid);
1728 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1729 union nfsd4_op_u *u)
1731 struct nfsd4_free_stateid *free_stateid = &u->free_stateid;
1732 return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid);
1736 nfsd4_decode_get_dir_delegation(struct nfsd4_compoundargs *argp,
1737 union nfsd4_op_u *u)
1739 struct nfsd4_get_dir_delegation *gdd = &u->get_dir_delegation;
1742 memset(gdd, 0, sizeof(*gdd));
1744 if (xdr_stream_decode_bool(argp->xdr, &gdd->gdda_signal_deleg_avail) < 0)
1745 return nfserr_bad_xdr;
1746 status = nfsd4_decode_bitmap4(argp, gdd->gdda_notification_types,
1747 ARRAY_SIZE(gdd->gdda_notification_types));
1750 status = nfsd4_decode_nfstime4(argp, &gdd->gdda_child_attr_delay);
1753 status = nfsd4_decode_nfstime4(argp, &gdd->gdda_dir_attr_delay);
1756 status = nfsd4_decode_bitmap4(argp, gdd->gdda_child_attributes,
1757 ARRAY_SIZE(gdd->gdda_child_attributes));
1760 return nfsd4_decode_bitmap4(argp, gdd->gdda_dir_attributes,
1761 ARRAY_SIZE(gdd->gdda_dir_attributes));
1764 #ifdef CONFIG_NFSD_PNFS
1766 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1767 union nfsd4_op_u *u)
1769 struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo;
1772 memset(gdev, 0, sizeof(*gdev));
1773 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1776 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1777 return nfserr_bad_xdr;
1778 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1779 return nfserr_bad_xdr;
1780 if (xdr_stream_decode_uint32_array(argp->xdr,
1781 &gdev->gd_notify_types, 1) < 0)
1782 return nfserr_bad_xdr;
1788 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1789 union nfsd4_op_u *u)
1791 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1794 memset(lcp, 0, sizeof(*lcp));
1795 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1796 return nfserr_bad_xdr;
1797 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1798 return nfserr_bad_xdr;
1799 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1800 return nfserr_bad_xdr;
1801 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1804 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1805 return nfserr_bad_xdr;
1806 if (lcp->lc_newoffset) {
1807 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1808 return nfserr_bad_xdr;
1810 lcp->lc_last_wr = 0;
1811 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1813 return nfserr_bad_xdr;
1814 if (xdr_item_is_present(p)) {
1815 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1819 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1821 return nfsd4_decode_layoutupdate4(argp, lcp);
1825 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1826 union nfsd4_op_u *u)
1828 struct nfsd4_layoutget *lgp = &u->layoutget;
1831 memset(lgp, 0, sizeof(*lgp));
1832 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1833 return nfserr_bad_xdr;
1834 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1835 return nfserr_bad_xdr;
1836 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1837 return nfserr_bad_xdr;
1838 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1839 return nfserr_bad_xdr;
1840 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1841 return nfserr_bad_xdr;
1842 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1843 return nfserr_bad_xdr;
1844 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
1847 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1848 return nfserr_bad_xdr;
1854 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1855 union nfsd4_op_u *u)
1857 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1858 memset(lrp, 0, sizeof(*lrp));
1859 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1860 return nfserr_bad_xdr;
1861 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1862 return nfserr_bad_xdr;
1863 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1864 return nfserr_bad_xdr;
1865 return nfsd4_decode_layoutreturn4(argp, lrp);
1867 #endif /* CONFIG_NFSD_PNFS */
1869 static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1870 union nfsd4_op_u *u)
1872 struct nfsd4_secinfo_no_name *sin = &u->secinfo_no_name;
1873 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1874 return nfserr_bad_xdr;
1876 sin->sin_exp = NULL;
1881 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1882 union nfsd4_op_u *u)
1884 struct nfsd4_sequence *seq = &u->sequence;
1887 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1890 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1892 return nfserr_bad_xdr;
1893 seq->seqid = be32_to_cpup(p++);
1894 seq->slotid = be32_to_cpup(p++);
1895 seq->maxslots = be32_to_cpup(p++);
1896 seq->cachethis = be32_to_cpup(p);
1898 seq->status_flags = 0;
1903 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp,
1904 union nfsd4_op_u *u)
1906 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
1907 struct nfsd4_test_stateid_id *stateid;
1911 memset(test_stateid, 0, sizeof(*test_stateid));
1912 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1913 return nfserr_bad_xdr;
1915 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1916 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1917 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1919 return nfserr_jukebox;
1920 INIT_LIST_HEAD(&stateid->ts_id_list);
1921 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1922 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1930 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1931 union nfsd4_op_u *u)
1933 struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;
1934 return nfsd4_decode_clientid4(argp, &dc->clientid);
1937 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1938 union nfsd4_op_u *u)
1940 struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;
1941 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1942 return nfserr_bad_xdr;
1947 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1948 union nfsd4_op_u *u)
1950 struct nfsd4_fallocate *fallocate = &u->allocate;
1953 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
1956 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1957 return nfserr_bad_xdr;
1958 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1959 return nfserr_bad_xdr;
1964 static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1965 struct nl4_server *ns)
1967 struct nfs42_netaddr *naddr;
1970 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1971 return nfserr_bad_xdr;
1973 /* currently support for 1 inter-server source server */
1974 switch (ns->nl4_type) {
1976 naddr = &ns->u.nl4_addr;
1978 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1979 return nfserr_bad_xdr;
1980 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1981 return nfserr_bad_xdr;
1983 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1985 return nfserr_bad_xdr;
1986 memcpy(naddr->netid, p, naddr->netid_len);
1988 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1989 return nfserr_bad_xdr;
1990 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1991 return nfserr_bad_xdr;
1993 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1995 return nfserr_bad_xdr;
1996 memcpy(naddr->addr, p, naddr->addr_len);
1999 return nfserr_bad_xdr;
2006 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
2008 struct nfsd4_copy *copy = &u->copy;
2009 u32 consecutive, i, count, sync;
2010 struct nl4_server *ns_dummy;
2013 memset(copy, 0, sizeof(*copy));
2014 status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid);
2017 status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid);
2020 if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0)
2021 return nfserr_bad_xdr;
2022 if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0)
2023 return nfserr_bad_xdr;
2024 if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0)
2025 return nfserr_bad_xdr;
2026 /* ca_consecutive: we always do consecutive copies */
2027 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
2028 return nfserr_bad_xdr;
2029 if (xdr_stream_decode_bool(argp->xdr, &sync) < 0)
2030 return nfserr_bad_xdr;
2031 nfsd4_copy_set_sync(copy, sync);
2033 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
2034 return nfserr_bad_xdr;
2035 copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src));
2036 if (copy->cp_src == NULL)
2037 return nfserr_jukebox;
2038 if (count == 0) { /* intra-server copy */
2039 __set_bit(NFSD4_COPY_F_INTRA, ©->cp_flags);
2043 /* decode all the supplied server addresses but use only the first */
2044 status = nfsd4_decode_nl4_server(argp, copy->cp_src);
2048 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
2049 if (ns_dummy == NULL)
2050 return nfserr_jukebox;
2051 for (i = 0; i < count - 1; i++) {
2052 status = nfsd4_decode_nl4_server(argp, ns_dummy);
2064 nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
2065 union nfsd4_op_u *u)
2067 struct nfsd4_copy_notify *cn = &u->copy_notify;
2070 memset(cn, 0, sizeof(*cn));
2071 cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src));
2072 if (cn->cpn_src == NULL)
2073 return nfserr_jukebox;
2074 cn->cpn_dst = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_dst));
2075 if (cn->cpn_dst == NULL)
2076 return nfserr_jukebox;
2078 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
2081 return nfsd4_decode_nl4_server(argp, cn->cpn_dst);
2085 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
2086 union nfsd4_op_u *u)
2088 struct nfsd4_offload_status *os = &u->offload_status;
2091 return nfsd4_decode_stateid4(argp, &os->stateid);
2095 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
2097 struct nfsd4_seek *seek = &u->seek;
2100 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
2103 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
2104 return nfserr_bad_xdr;
2105 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
2106 return nfserr_bad_xdr;
2114 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
2116 struct nfsd4_clone *clone = &u->clone;
2119 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
2122 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
2125 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
2126 return nfserr_bad_xdr;
2127 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
2128 return nfserr_bad_xdr;
2129 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2130 return nfserr_bad_xdr;
2136 * XDR data that is more than PAGE_SIZE in size is normally part of a
2137 * read or write. However, the size of extended attributes is limited
2138 * by the maximum request size, and then further limited by the underlying
2139 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2140 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2141 * and we're not dealing with contiguous pages, we need to do some copying.
2145 * Decode data into buffer.
2148 nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2149 char **bufp, u32 buflen)
2151 struct page **pages = xdr->pages;
2152 struct kvec *head = xdr->head;
2156 if (buflen <= head->iov_len) {
2158 * We're in luck, the head has enough space. Just return
2159 * the head, no need for copying.
2161 *bufp = head->iov_base;
2165 tmp = svcxdr_tmpalloc(argp, buflen);
2167 return nfserr_jukebox;
2170 memcpy(dp, head->iov_base, head->iov_len);
2171 buflen -= head->iov_len;
2172 dp += head->iov_len;
2174 while (buflen > 0) {
2175 len = min_t(u32, buflen, PAGE_SIZE);
2176 memcpy(dp, page_address(*pages), len);
2188 * Get a user extended attribute name from the XDR buffer.
2189 * It will not have the "user." prefix, so prepend it.
2190 * Lastly, check for nul characters in the name.
2193 nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2195 char *name, *sp, *dp;
2199 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2200 return nfserr_bad_xdr;
2201 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2202 return nfserr_nametoolong;
2204 return nfserr_bad_xdr;
2205 p = xdr_inline_decode(argp->xdr, namelen);
2207 return nfserr_bad_xdr;
2208 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2210 return nfserr_jukebox;
2211 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2214 * Copy the extended attribute name over while checking for 0
2218 dp = name + XATTR_USER_PREFIX_LEN;
2223 return nfserr_bad_xdr;
2234 * A GETXATTR op request comes without a length specifier. We just set the
2235 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2236 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2237 * check it against getxa_len, and allocate + return the value.
2240 nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2241 union nfsd4_op_u *u)
2243 struct nfsd4_getxattr *getxattr = &u->getxattr;
2247 memset(getxattr, 0, sizeof(*getxattr));
2248 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2252 maxcount = svc_max_payload(argp->rqstp);
2253 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2255 getxattr->getxa_len = maxcount;
2260 nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2261 union nfsd4_op_u *u)
2263 struct nfsd4_setxattr *setxattr = &u->setxattr;
2264 u32 flags, maxcount, size;
2267 memset(setxattr, 0, sizeof(*setxattr));
2269 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2270 return nfserr_bad_xdr;
2272 if (flags > SETXATTR4_REPLACE)
2273 return nfserr_inval;
2274 setxattr->setxa_flags = flags;
2276 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2280 maxcount = svc_max_payload(argp->rqstp);
2281 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2283 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2284 return nfserr_bad_xdr;
2285 if (size > maxcount)
2286 return nfserr_xattr2big;
2288 setxattr->setxa_len = size;
2290 struct xdr_buf payload;
2292 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
2293 return nfserr_bad_xdr;
2294 status = nfsd4_vbuf_from_vector(argp, &payload,
2295 &setxattr->setxa_buf, size);
2302 nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2303 union nfsd4_op_u *u)
2305 struct nfsd4_listxattrs *listxattrs = &u->listxattrs;
2308 memset(listxattrs, 0, sizeof(*listxattrs));
2310 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2311 return nfserr_bad_xdr;
2314 * If the cookie is too large to have even one user.x attribute
2315 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2317 if (listxattrs->lsxa_cookie >=
2318 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2319 return nfserr_badcookie;
2321 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2322 return nfserr_bad_xdr;
2324 /* Always need at least 2 words (length and one character) */
2325 return nfserr_inval;
2327 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2328 listxattrs->lsxa_maxcount = maxcount;
2334 nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2335 union nfsd4_op_u *u)
2337 struct nfsd4_removexattr *removexattr = &u->removexattr;
2338 memset(removexattr, 0, sizeof(*removexattr));
2339 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2343 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
2349 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
2351 return nfserr_notsupp;
2354 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u);
2356 static const nfsd4_dec nfsd4_dec_ops[] = {
2357 [OP_ACCESS] = nfsd4_decode_access,
2358 [OP_CLOSE] = nfsd4_decode_close,
2359 [OP_COMMIT] = nfsd4_decode_commit,
2360 [OP_CREATE] = nfsd4_decode_create,
2361 [OP_DELEGPURGE] = nfsd4_decode_notsupp,
2362 [OP_DELEGRETURN] = nfsd4_decode_delegreturn,
2363 [OP_GETATTR] = nfsd4_decode_getattr,
2364 [OP_GETFH] = nfsd4_decode_noop,
2365 [OP_LINK] = nfsd4_decode_link,
2366 [OP_LOCK] = nfsd4_decode_lock,
2367 [OP_LOCKT] = nfsd4_decode_lockt,
2368 [OP_LOCKU] = nfsd4_decode_locku,
2369 [OP_LOOKUP] = nfsd4_decode_lookup,
2370 [OP_LOOKUPP] = nfsd4_decode_noop,
2371 [OP_NVERIFY] = nfsd4_decode_verify,
2372 [OP_OPEN] = nfsd4_decode_open,
2373 [OP_OPENATTR] = nfsd4_decode_notsupp,
2374 [OP_OPEN_CONFIRM] = nfsd4_decode_open_confirm,
2375 [OP_OPEN_DOWNGRADE] = nfsd4_decode_open_downgrade,
2376 [OP_PUTFH] = nfsd4_decode_putfh,
2377 [OP_PUTPUBFH] = nfsd4_decode_putpubfh,
2378 [OP_PUTROOTFH] = nfsd4_decode_noop,
2379 [OP_READ] = nfsd4_decode_read,
2380 [OP_READDIR] = nfsd4_decode_readdir,
2381 [OP_READLINK] = nfsd4_decode_noop,
2382 [OP_REMOVE] = nfsd4_decode_remove,
2383 [OP_RENAME] = nfsd4_decode_rename,
2384 [OP_RENEW] = nfsd4_decode_renew,
2385 [OP_RESTOREFH] = nfsd4_decode_noop,
2386 [OP_SAVEFH] = nfsd4_decode_noop,
2387 [OP_SECINFO] = nfsd4_decode_secinfo,
2388 [OP_SETATTR] = nfsd4_decode_setattr,
2389 [OP_SETCLIENTID] = nfsd4_decode_setclientid,
2390 [OP_SETCLIENTID_CONFIRM] = nfsd4_decode_setclientid_confirm,
2391 [OP_VERIFY] = nfsd4_decode_verify,
2392 [OP_WRITE] = nfsd4_decode_write,
2393 [OP_RELEASE_LOCKOWNER] = nfsd4_decode_release_lockowner,
2395 /* new operations for NFSv4.1 */
2396 [OP_BACKCHANNEL_CTL] = nfsd4_decode_backchannel_ctl,
2397 [OP_BIND_CONN_TO_SESSION] = nfsd4_decode_bind_conn_to_session,
2398 [OP_EXCHANGE_ID] = nfsd4_decode_exchange_id,
2399 [OP_CREATE_SESSION] = nfsd4_decode_create_session,
2400 [OP_DESTROY_SESSION] = nfsd4_decode_destroy_session,
2401 [OP_FREE_STATEID] = nfsd4_decode_free_stateid,
2402 [OP_GET_DIR_DELEGATION] = nfsd4_decode_get_dir_delegation,
2403 #ifdef CONFIG_NFSD_PNFS
2404 [OP_GETDEVICEINFO] = nfsd4_decode_getdeviceinfo,
2405 [OP_GETDEVICELIST] = nfsd4_decode_notsupp,
2406 [OP_LAYOUTCOMMIT] = nfsd4_decode_layoutcommit,
2407 [OP_LAYOUTGET] = nfsd4_decode_layoutget,
2408 [OP_LAYOUTRETURN] = nfsd4_decode_layoutreturn,
2410 [OP_GETDEVICEINFO] = nfsd4_decode_notsupp,
2411 [OP_GETDEVICELIST] = nfsd4_decode_notsupp,
2412 [OP_LAYOUTCOMMIT] = nfsd4_decode_notsupp,
2413 [OP_LAYOUTGET] = nfsd4_decode_notsupp,
2414 [OP_LAYOUTRETURN] = nfsd4_decode_notsupp,
2416 [OP_SECINFO_NO_NAME] = nfsd4_decode_secinfo_no_name,
2417 [OP_SEQUENCE] = nfsd4_decode_sequence,
2418 [OP_SET_SSV] = nfsd4_decode_notsupp,
2419 [OP_TEST_STATEID] = nfsd4_decode_test_stateid,
2420 [OP_WANT_DELEGATION] = nfsd4_decode_notsupp,
2421 [OP_DESTROY_CLIENTID] = nfsd4_decode_destroy_clientid,
2422 [OP_RECLAIM_COMPLETE] = nfsd4_decode_reclaim_complete,
2424 /* new operations for NFSv4.2 */
2425 [OP_ALLOCATE] = nfsd4_decode_fallocate,
2426 [OP_COPY] = nfsd4_decode_copy,
2427 [OP_COPY_NOTIFY] = nfsd4_decode_copy_notify,
2428 [OP_DEALLOCATE] = nfsd4_decode_fallocate,
2429 [OP_IO_ADVISE] = nfsd4_decode_notsupp,
2430 [OP_LAYOUTERROR] = nfsd4_decode_notsupp,
2431 [OP_LAYOUTSTATS] = nfsd4_decode_notsupp,
2432 [OP_OFFLOAD_CANCEL] = nfsd4_decode_offload_status,
2433 [OP_OFFLOAD_STATUS] = nfsd4_decode_offload_status,
2434 [OP_READ_PLUS] = nfsd4_decode_read,
2435 [OP_SEEK] = nfsd4_decode_seek,
2436 [OP_WRITE_SAME] = nfsd4_decode_notsupp,
2437 [OP_CLONE] = nfsd4_decode_clone,
2438 /* RFC 8276 extended atributes operations */
2439 [OP_GETXATTR] = nfsd4_decode_getxattr,
2440 [OP_SETXATTR] = nfsd4_decode_setxattr,
2441 [OP_LISTXATTRS] = nfsd4_decode_listxattrs,
2442 [OP_REMOVEXATTR] = nfsd4_decode_removexattr,
2446 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2448 if (op->opnum < FIRST_NFS4_OP)
2450 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
2452 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2454 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
2460 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2462 struct nfsd4_op *op;
2463 bool cachethis = false;
2464 int auth_slack= argp->rqstp->rq_auth_slack;
2465 int max_reply = auth_slack + 8; /* opcnt, status */
2471 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
2473 max_reply += XDR_UNIT;
2475 if (unlikely(argp->taglen)) {
2476 if (argp->taglen > NFSD4_MAX_TAGLEN)
2478 p = xdr_inline_decode(argp->xdr, argp->taglen);
2481 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
2484 max_reply += xdr_align_size(argp->taglen);
2487 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
2489 if (xdr_stream_decode_u32(argp->xdr, &argp->client_opcnt) < 0)
2491 argp->opcnt = min_t(u32, argp->client_opcnt,
2492 NFSD_MAX_OPS_PER_COMPOUND);
2494 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
2495 argp->ops = vcalloc(argp->opcnt, sizeof(*argp->ops));
2497 argp->ops = argp->iops;
2502 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
2505 for (i = 0; i < argp->opcnt; i++) {
2510 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
2512 if (nfsd4_opnum_in_range(argp, op)) {
2513 op->opdesc = OPDESC(op);
2514 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
2515 if (op->status != nfs_ok)
2516 trace_nfsd_compound_decode_err(argp->rqstp,
2521 op->opnum = OP_ILLEGAL;
2522 op->status = nfserr_op_illegal;
2526 * We'll try to cache the result in the DRC if any one
2527 * op in the compound wants to be cached:
2529 cachethis |= nfsd4_cache_this_op(op);
2531 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
2533 readbytes += nfsd4_max_reply(argp->rqstp, op);
2535 max_reply += nfsd4_max_reply(argp->rqstp, op);
2537 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2538 * (Special case because it will just skip encoding this
2539 * if it runs out of xdr buffer space, and it is the only
2540 * operation that behaves this way.)
2542 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
2543 max_reply += NFS4_OPAQUE_LIMIT;
2550 /* Sessions make the DRC unnecessary: */
2551 if (argp->minorversion)
2553 svc_reserve(argp->rqstp, max_reply + readbytes);
2554 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
2556 argp->splice_ok = nfsd_read_splice_ok(argp->rqstp);
2557 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
2558 argp->splice_ok = false;
2563 static __be32 nfsd4_encode_nfs_fh4(struct xdr_stream *xdr,
2564 struct knfsd_fh *fh_handle)
2566 return nfsd4_encode_opaque(xdr, fh_handle->fh_raw, fh_handle->fh_size);
2569 /* This is a frequently-encoded type; open-coded for speed */
2570 static __be32 nfsd4_encode_nfstime4(struct xdr_stream *xdr,
2571 const struct timespec64 *tv)
2575 p = xdr_reserve_space(xdr, XDR_UNIT * 3);
2577 return nfserr_resource;
2578 p = xdr_encode_hyper(p, tv->tv_sec);
2579 *p = cpu_to_be32(tv->tv_nsec);
2583 static __be32 nfsd4_encode_specdata4(struct xdr_stream *xdr,
2584 unsigned int major, unsigned int minor)
2588 status = nfsd4_encode_uint32_t(xdr, major);
2589 if (status != nfs_ok)
2591 return nfsd4_encode_uint32_t(xdr, minor);
2595 nfsd4_encode_change_info4(struct xdr_stream *xdr, const struct nfsd4_change_info *c)
2599 status = nfsd4_encode_bool(xdr, c->atomic);
2600 if (status != nfs_ok)
2602 status = nfsd4_encode_changeid4(xdr, c->before_change);
2603 if (status != nfs_ok)
2605 return nfsd4_encode_changeid4(xdr, c->after_change);
2608 static __be32 nfsd4_encode_netaddr4(struct xdr_stream *xdr,
2609 const struct nfs42_netaddr *addr)
2614 status = nfsd4_encode_opaque(xdr, addr->netid, addr->netid_len);
2615 if (status != nfs_ok)
2618 return nfsd4_encode_opaque(xdr, addr->addr, addr->addr_len);
2621 /* Encode as an array of strings the string given with components
2622 * separated @sep, escaped with esc_enter and esc_exit.
2624 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2625 char *components, char esc_enter,
2631 int strlen, count=0;
2632 char *str, *end, *next;
2634 dprintk("nfsd4_encode_components(%s)\n", components);
2636 pathlen_offset = xdr->buf->len;
2637 p = xdr_reserve_space(xdr, 4);
2639 return nfserr_resource;
2640 p++; /* We will fill this in with @count later */
2642 end = str = components;
2644 bool found_esc = false;
2646 /* try to parse as esc_start, ..., esc_end, sep */
2647 if (*str == esc_enter) {
2648 for (; *end && (*end != esc_exit); end++)
2649 /* find esc_exit or end of string */;
2651 if (*end && (!*next || *next == sep)) {
2658 for (; *end && (*end != sep); end++)
2659 /* find sep or end of string */;
2663 p = xdr_reserve_space(xdr, strlen + 4);
2665 return nfserr_resource;
2666 p = xdr_encode_opaque(p, str, strlen);
2676 pathlen = htonl(count);
2677 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2681 /* Encode as an array of strings the string given with components
2684 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2687 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2690 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2691 struct nfsd4_fs_location *location)
2695 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2699 status = nfsd4_encode_components(xdr, '/', location->path);
2705 static __be32 nfsd4_encode_pathname4(struct xdr_stream *xdr,
2706 const struct path *root,
2707 const struct path *path)
2709 struct path cur = *path;
2711 struct dentry **components = NULL;
2712 unsigned int ncomponents = 0;
2713 __be32 err = nfserr_jukebox;
2715 dprintk("nfsd4_encode_components(");
2718 /* First walk the path up to the nfsd root, and store the
2719 * dentries/path components in an array.
2722 if (path_equal(&cur, root))
2724 if (cur.dentry == cur.mnt->mnt_root) {
2725 if (follow_up(&cur))
2729 if ((ncomponents & 15) == 0) {
2730 struct dentry **new;
2731 new = krealloc(components,
2732 sizeof(*new) * (ncomponents + 16),
2738 components[ncomponents++] = cur.dentry;
2739 cur.dentry = dget_parent(cur.dentry);
2741 err = nfserr_resource;
2742 p = xdr_reserve_space(xdr, 4);
2745 *p++ = cpu_to_be32(ncomponents);
2747 while (ncomponents) {
2748 struct dentry *dentry = components[ncomponents - 1];
2751 spin_lock(&dentry->d_lock);
2752 len = dentry->d_name.len;
2753 p = xdr_reserve_space(xdr, len + 4);
2755 spin_unlock(&dentry->d_lock);
2758 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2759 dprintk("/%pd", dentry);
2760 spin_unlock(&dentry->d_lock);
2769 dput(components[--ncomponents]);
2775 static __be32 nfsd4_encode_fs_locations4(struct xdr_stream *xdr,
2776 struct svc_rqst *rqstp,
2777 struct svc_export *exp)
2779 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2780 struct svc_export *exp_ps;
2785 exp_ps = rqst_find_fsidzero_export(rqstp);
2787 return nfserrno(PTR_ERR(exp_ps));
2788 status = nfsd4_encode_pathname4(xdr, &exp_ps->ex_path, &exp->ex_path);
2790 if (status != nfs_ok)
2794 if (xdr_stream_encode_u32(xdr, fslocs->locations_count) != XDR_UNIT)
2795 return nfserr_resource;
2796 for (i = 0; i < fslocs->locations_count; i++) {
2797 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2798 if (status != nfs_ok)
2805 static __be32 nfsd4_encode_nfsace4(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2806 struct nfs4_ace *ace)
2811 status = nfsd4_encode_acetype4(xdr, ace->type);
2812 if (status != nfs_ok)
2813 return nfserr_resource;
2815 status = nfsd4_encode_aceflag4(xdr, ace->flag);
2816 if (status != nfs_ok)
2817 return nfserr_resource;
2819 status = nfsd4_encode_acemask4(xdr, ace->access_mask & NFS4_ACE_MASK_ALL);
2820 if (status != nfs_ok)
2821 return nfserr_resource;
2823 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2824 return nfs4_acl_write_who(xdr, ace->whotype);
2825 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2826 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2827 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2830 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2831 FATTR4_WORD0_RDATTR_ERROR)
2832 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2833 #define WORD2_ABSENT_FS_ATTRS 0
2835 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2836 static inline __be32
2837 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2838 void *context, int len)
2842 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2844 return nfserr_resource;
2847 * For now we use a 0 here to indicate the null translation; in
2848 * the future we may place a call to translation code here.
2850 *p++ = cpu_to_be32(0); /* lfs */
2851 *p++ = cpu_to_be32(0); /* pi */
2852 p = xdr_encode_opaque(p, context, len);
2856 static inline __be32
2857 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2858 void *context, int len)
2862 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2864 /* As per referral draft: */
2865 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2866 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2867 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2868 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2869 *rdattr_err = NFSERR_MOVED;
2871 return nfserr_moved;
2873 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2874 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2875 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2880 static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino)
2882 struct path path = exp->ex_path;
2887 while (follow_up(&path)) {
2888 if (path.dentry != path.mnt->mnt_root)
2891 err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT);
2899 nfsd4_encode_bitmap4(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2904 p = xdr_reserve_space(xdr, XDR_UNIT * 4);
2907 *p++ = cpu_to_be32(3);
2908 *p++ = cpu_to_be32(bmval0);
2909 *p++ = cpu_to_be32(bmval1);
2910 *p++ = cpu_to_be32(bmval2);
2911 } else if (bmval1) {
2912 p = xdr_reserve_space(xdr, XDR_UNIT * 3);
2915 *p++ = cpu_to_be32(2);
2916 *p++ = cpu_to_be32(bmval0);
2917 *p++ = cpu_to_be32(bmval1);
2919 p = xdr_reserve_space(xdr, XDR_UNIT * 2);
2922 *p++ = cpu_to_be32(1);
2923 *p++ = cpu_to_be32(bmval0);
2928 return nfserr_resource;
2931 struct nfsd4_fattr_args {
2932 struct svc_rqst *rqstp;
2934 struct svc_export *exp;
2935 struct dentry *dentry;
2937 struct kstatfs statfs;
2938 struct nfs4_acl *acl;
2940 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2945 bool contextsupport;
2946 bool ignore_crossmnt;
2949 typedef __be32(*nfsd4_enc_attr)(struct xdr_stream *xdr,
2950 const struct nfsd4_fattr_args *args);
2952 static __be32 nfsd4_encode_fattr4__noop(struct xdr_stream *xdr,
2953 const struct nfsd4_fattr_args *args)
2958 static __be32 nfsd4_encode_fattr4__true(struct xdr_stream *xdr,
2959 const struct nfsd4_fattr_args *args)
2961 return nfsd4_encode_bool(xdr, true);
2964 static __be32 nfsd4_encode_fattr4__false(struct xdr_stream *xdr,
2965 const struct nfsd4_fattr_args *args)
2967 return nfsd4_encode_bool(xdr, false);
2970 static __be32 nfsd4_encode_fattr4_supported_attrs(struct xdr_stream *xdr,
2971 const struct nfsd4_fattr_args *args)
2973 struct nfsd4_compoundres *resp = args->rqstp->rq_resp;
2974 u32 minorversion = resp->cstate.minorversion;
2977 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2978 if (!IS_POSIXACL(d_inode(args->dentry)))
2979 supp[0] &= ~FATTR4_WORD0_ACL;
2980 if (!args->contextsupport)
2981 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2983 return nfsd4_encode_bitmap4(xdr, supp[0], supp[1], supp[2]);
2986 static __be32 nfsd4_encode_fattr4_type(struct xdr_stream *xdr,
2987 const struct nfsd4_fattr_args *args)
2991 p = xdr_reserve_space(xdr, XDR_UNIT);
2993 return nfserr_resource;
2995 switch (args->stat.mode & S_IFMT) {
2997 *p = cpu_to_be32(NF4FIFO);
3000 *p = cpu_to_be32(NF4CHR);
3003 *p = cpu_to_be32(NF4DIR);
3006 *p = cpu_to_be32(NF4BLK);
3009 *p = cpu_to_be32(NF4LNK);
3012 *p = cpu_to_be32(NF4REG);
3015 *p = cpu_to_be32(NF4SOCK);
3018 return nfserr_serverfault;
3024 static __be32 nfsd4_encode_fattr4_fh_expire_type(struct xdr_stream *xdr,
3025 const struct nfsd4_fattr_args *args)
3029 mask = NFS4_FH_PERSISTENT;
3030 if (!(args->exp->ex_flags & NFSEXP_NOSUBTREECHECK))
3031 mask |= NFS4_FH_VOL_RENAME;
3032 return nfsd4_encode_uint32_t(xdr, mask);
3035 static __be32 nfsd4_encode_fattr4_change(struct xdr_stream *xdr,
3036 const struct nfsd4_fattr_args *args)
3038 const struct svc_export *exp = args->exp;
3041 if (unlikely(exp->ex_flags & NFSEXP_V4ROOT)) {
3042 u32 flush_time = convert_to_wallclock(exp->cd->flush_time);
3044 if (xdr_stream_encode_u32(xdr, flush_time) != XDR_UNIT)
3045 return nfserr_resource;
3046 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
3047 return nfserr_resource;
3051 c = nfsd4_change_attribute(&args->stat, d_inode(args->dentry));
3052 return nfsd4_encode_changeid4(xdr, c);
3055 static __be32 nfsd4_encode_fattr4_size(struct xdr_stream *xdr,
3056 const struct nfsd4_fattr_args *args)
3058 return nfsd4_encode_uint64_t(xdr, args->size);
3061 static __be32 nfsd4_encode_fattr4_fsid(struct xdr_stream *xdr,
3062 const struct nfsd4_fattr_args *args)
3066 p = xdr_reserve_space(xdr, XDR_UNIT * 2 + XDR_UNIT * 2);
3068 return nfserr_resource;
3070 if (unlikely(args->exp->ex_fslocs.migrated)) {
3071 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3072 xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
3075 switch (fsid_source(args->fhp)) {
3076 case FSIDSOURCE_FSID:
3077 p = xdr_encode_hyper(p, (u64)args->exp->ex_fsid);
3078 xdr_encode_hyper(p, (u64)0);
3080 case FSIDSOURCE_DEV:
3082 *p++ = cpu_to_be32(MAJOR(args->stat.dev));
3084 *p = cpu_to_be32(MINOR(args->stat.dev));
3086 case FSIDSOURCE_UUID:
3087 xdr_encode_opaque_fixed(p, args->exp->ex_uuid, EX_UUID_LEN);
3094 static __be32 nfsd4_encode_fattr4_lease_time(struct xdr_stream *xdr,
3095 const struct nfsd4_fattr_args *args)
3097 struct nfsd_net *nn = net_generic(SVC_NET(args->rqstp), nfsd_net_id);
3099 return nfsd4_encode_nfs_lease4(xdr, nn->nfsd4_lease);
3102 static __be32 nfsd4_encode_fattr4_rdattr_error(struct xdr_stream *xdr,
3103 const struct nfsd4_fattr_args *args)
3105 return nfsd4_encode_uint32_t(xdr, args->rdattr_err);
3108 static __be32 nfsd4_encode_fattr4_aclsupport(struct xdr_stream *xdr,
3109 const struct nfsd4_fattr_args *args)
3114 if (IS_POSIXACL(d_inode(args->dentry)))
3115 mask = ACL4_SUPPORT_ALLOW_ACL | ACL4_SUPPORT_DENY_ACL;
3116 return nfsd4_encode_uint32_t(xdr, mask);
3119 static __be32 nfsd4_encode_fattr4_acl(struct xdr_stream *xdr,
3120 const struct nfsd4_fattr_args *args)
3122 struct nfs4_acl *acl = args->acl;
3123 struct nfs4_ace *ace;
3128 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
3129 return nfserr_resource;
3131 if (xdr_stream_encode_u32(xdr, acl->naces) != XDR_UNIT)
3132 return nfserr_resource;
3133 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
3134 status = nfsd4_encode_nfsace4(xdr, args->rqstp, ace);
3135 if (status != nfs_ok)
3142 static __be32 nfsd4_encode_fattr4_filehandle(struct xdr_stream *xdr,
3143 const struct nfsd4_fattr_args *args)
3145 return nfsd4_encode_nfs_fh4(xdr, &args->fhp->fh_handle);
3148 static __be32 nfsd4_encode_fattr4_fileid(struct xdr_stream *xdr,
3149 const struct nfsd4_fattr_args *args)
3151 return nfsd4_encode_uint64_t(xdr, args->stat.ino);
3154 static __be32 nfsd4_encode_fattr4_files_avail(struct xdr_stream *xdr,
3155 const struct nfsd4_fattr_args *args)
3157 return nfsd4_encode_uint64_t(xdr, args->statfs.f_ffree);
3160 static __be32 nfsd4_encode_fattr4_files_free(struct xdr_stream *xdr,
3161 const struct nfsd4_fattr_args *args)
3163 return nfsd4_encode_uint64_t(xdr, args->statfs.f_ffree);
3166 static __be32 nfsd4_encode_fattr4_files_total(struct xdr_stream *xdr,
3167 const struct nfsd4_fattr_args *args)
3169 return nfsd4_encode_uint64_t(xdr, args->statfs.f_files);
3172 static __be32 nfsd4_encode_fattr4_fs_locations(struct xdr_stream *xdr,
3173 const struct nfsd4_fattr_args *args)
3175 return nfsd4_encode_fs_locations4(xdr, args->rqstp, args->exp);
3178 static __be32 nfsd4_encode_fattr4_maxfilesize(struct xdr_stream *xdr,
3179 const struct nfsd4_fattr_args *args)
3181 struct super_block *sb = args->exp->ex_path.mnt->mnt_sb;
3183 return nfsd4_encode_uint64_t(xdr, sb->s_maxbytes);
3186 static __be32 nfsd4_encode_fattr4_maxlink(struct xdr_stream *xdr,
3187 const struct nfsd4_fattr_args *args)
3189 return nfsd4_encode_uint32_t(xdr, 255);
3192 static __be32 nfsd4_encode_fattr4_maxname(struct xdr_stream *xdr,
3193 const struct nfsd4_fattr_args *args)
3195 return nfsd4_encode_uint32_t(xdr, args->statfs.f_namelen);
3198 static __be32 nfsd4_encode_fattr4_maxread(struct xdr_stream *xdr,
3199 const struct nfsd4_fattr_args *args)
3201 return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp));
3204 static __be32 nfsd4_encode_fattr4_maxwrite(struct xdr_stream *xdr,
3205 const struct nfsd4_fattr_args *args)
3207 return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp));
3210 static __be32 nfsd4_encode_fattr4_mode(struct xdr_stream *xdr,
3211 const struct nfsd4_fattr_args *args)
3213 return nfsd4_encode_mode4(xdr, args->stat.mode & S_IALLUGO);
3216 static __be32 nfsd4_encode_fattr4_numlinks(struct xdr_stream *xdr,
3217 const struct nfsd4_fattr_args *args)
3219 return nfsd4_encode_uint32_t(xdr, args->stat.nlink);
3222 static __be32 nfsd4_encode_fattr4_owner(struct xdr_stream *xdr,
3223 const struct nfsd4_fattr_args *args)
3225 return nfsd4_encode_user(xdr, args->rqstp, args->stat.uid);
3228 static __be32 nfsd4_encode_fattr4_owner_group(struct xdr_stream *xdr,
3229 const struct nfsd4_fattr_args *args)
3231 return nfsd4_encode_group(xdr, args->rqstp, args->stat.gid);
3234 static __be32 nfsd4_encode_fattr4_rawdev(struct xdr_stream *xdr,
3235 const struct nfsd4_fattr_args *args)
3237 return nfsd4_encode_specdata4(xdr, MAJOR(args->stat.rdev),
3238 MINOR(args->stat.rdev));
3241 static __be32 nfsd4_encode_fattr4_space_avail(struct xdr_stream *xdr,
3242 const struct nfsd4_fattr_args *args)
3244 u64 avail = (u64)args->statfs.f_bavail * (u64)args->statfs.f_bsize;
3246 return nfsd4_encode_uint64_t(xdr, avail);
3249 static __be32 nfsd4_encode_fattr4_space_free(struct xdr_stream *xdr,
3250 const struct nfsd4_fattr_args *args)
3252 u64 free = (u64)args->statfs.f_bfree * (u64)args->statfs.f_bsize;
3254 return nfsd4_encode_uint64_t(xdr, free);
3257 static __be32 nfsd4_encode_fattr4_space_total(struct xdr_stream *xdr,
3258 const struct nfsd4_fattr_args *args)
3260 u64 total = (u64)args->statfs.f_blocks * (u64)args->statfs.f_bsize;
3262 return nfsd4_encode_uint64_t(xdr, total);
3265 static __be32 nfsd4_encode_fattr4_space_used(struct xdr_stream *xdr,
3266 const struct nfsd4_fattr_args *args)
3268 return nfsd4_encode_uint64_t(xdr, (u64)args->stat.blocks << 9);
3271 static __be32 nfsd4_encode_fattr4_time_access(struct xdr_stream *xdr,
3272 const struct nfsd4_fattr_args *args)
3274 return nfsd4_encode_nfstime4(xdr, &args->stat.atime);
3277 static __be32 nfsd4_encode_fattr4_time_create(struct xdr_stream *xdr,
3278 const struct nfsd4_fattr_args *args)
3280 return nfsd4_encode_nfstime4(xdr, &args->stat.btime);
3284 * ctime (in NFSv4, time_metadata) is not writeable, and the client
3285 * doesn't really care what resolution could theoretically be stored by
3288 * The client cares how close together changes can be while still
3289 * guaranteeing ctime changes. For most filesystems (which have
3290 * timestamps with nanosecond fields) that is limited by the resolution
3291 * of the time returned from current_time() (which I'm assuming to be
3294 static __be32 nfsd4_encode_fattr4_time_delta(struct xdr_stream *xdr,
3295 const struct nfsd4_fattr_args *args)
3297 const struct inode *inode = d_inode(args->dentry);
3298 u32 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
3299 struct timespec64 ts = ns_to_timespec64(ns);
3301 return nfsd4_encode_nfstime4(xdr, &ts);
3304 static __be32 nfsd4_encode_fattr4_time_metadata(struct xdr_stream *xdr,
3305 const struct nfsd4_fattr_args *args)
3307 return nfsd4_encode_nfstime4(xdr, &args->stat.ctime);
3310 static __be32 nfsd4_encode_fattr4_time_modify(struct xdr_stream *xdr,
3311 const struct nfsd4_fattr_args *args)
3313 return nfsd4_encode_nfstime4(xdr, &args->stat.mtime);
3316 static __be32 nfsd4_encode_fattr4_mounted_on_fileid(struct xdr_stream *xdr,
3317 const struct nfsd4_fattr_args *args)
3322 if (!args->ignore_crossmnt &&
3323 args->dentry == args->exp->ex_path.mnt->mnt_root) {
3324 err = nfsd4_get_mounted_on_ino(args->exp, &ino);
3326 return nfserrno(err);
3328 ino = args->stat.ino;
3330 return nfsd4_encode_uint64_t(xdr, ino);
3333 #ifdef CONFIG_NFSD_PNFS
3335 static __be32 nfsd4_encode_fattr4_fs_layout_types(struct xdr_stream *xdr,
3336 const struct nfsd4_fattr_args *args)
3338 unsigned long mask = args->exp->ex_layout_types;
3341 /* Hamming weight of @mask is the number of layout types to return */
3342 if (xdr_stream_encode_u32(xdr, hweight_long(mask)) != XDR_UNIT)
3343 return nfserr_resource;
3344 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
3345 if (mask & BIT(i)) {
3347 if (xdr_stream_encode_u32(xdr, i) != XDR_UNIT)
3348 return nfserr_resource;
3353 static __be32 nfsd4_encode_fattr4_layout_types(struct xdr_stream *xdr,
3354 const struct nfsd4_fattr_args *args)
3356 unsigned long mask = args->exp->ex_layout_types;
3359 /* Hamming weight of @mask is the number of layout types to return */
3360 if (xdr_stream_encode_u32(xdr, hweight_long(mask)) != XDR_UNIT)
3361 return nfserr_resource;
3362 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
3363 if (mask & BIT(i)) {
3365 if (xdr_stream_encode_u32(xdr, i) != XDR_UNIT)
3366 return nfserr_resource;
3371 static __be32 nfsd4_encode_fattr4_layout_blksize(struct xdr_stream *xdr,
3372 const struct nfsd4_fattr_args *args)
3374 return nfsd4_encode_uint32_t(xdr, args->stat.blksize);
3379 static __be32 nfsd4_encode_fattr4_suppattr_exclcreat(struct xdr_stream *xdr,
3380 const struct nfsd4_fattr_args *args)
3382 struct nfsd4_compoundres *resp = args->rqstp->rq_resp;
3385 memcpy(supp, nfsd_suppattrs[resp->cstate.minorversion], sizeof(supp));
3386 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3387 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3388 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3390 return nfsd4_encode_bitmap4(xdr, supp[0], supp[1], supp[2]);
3393 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3394 static __be32 nfsd4_encode_fattr4_sec_label(struct xdr_stream *xdr,
3395 const struct nfsd4_fattr_args *args)
3397 return nfsd4_encode_security_label(xdr, args->rqstp,
3398 args->context, args->contextlen);
3402 static __be32 nfsd4_encode_fattr4_xattr_support(struct xdr_stream *xdr,
3403 const struct nfsd4_fattr_args *args)
3405 int err = xattr_supports_user_prefix(d_inode(args->dentry));
3407 return nfsd4_encode_bool(xdr, err == 0);
3410 static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = {
3411 [FATTR4_SUPPORTED_ATTRS] = nfsd4_encode_fattr4_supported_attrs,
3412 [FATTR4_TYPE] = nfsd4_encode_fattr4_type,
3413 [FATTR4_FH_EXPIRE_TYPE] = nfsd4_encode_fattr4_fh_expire_type,
3414 [FATTR4_CHANGE] = nfsd4_encode_fattr4_change,
3415 [FATTR4_SIZE] = nfsd4_encode_fattr4_size,
3416 [FATTR4_LINK_SUPPORT] = nfsd4_encode_fattr4__true,
3417 [FATTR4_SYMLINK_SUPPORT] = nfsd4_encode_fattr4__true,
3418 [FATTR4_NAMED_ATTR] = nfsd4_encode_fattr4__false,
3419 [FATTR4_FSID] = nfsd4_encode_fattr4_fsid,
3420 [FATTR4_UNIQUE_HANDLES] = nfsd4_encode_fattr4__true,
3421 [FATTR4_LEASE_TIME] = nfsd4_encode_fattr4_lease_time,
3422 [FATTR4_RDATTR_ERROR] = nfsd4_encode_fattr4_rdattr_error,
3423 [FATTR4_ACL] = nfsd4_encode_fattr4_acl,
3424 [FATTR4_ACLSUPPORT] = nfsd4_encode_fattr4_aclsupport,
3425 [FATTR4_ARCHIVE] = nfsd4_encode_fattr4__noop,
3426 [FATTR4_CANSETTIME] = nfsd4_encode_fattr4__true,
3427 [FATTR4_CASE_INSENSITIVE] = nfsd4_encode_fattr4__false,
3428 [FATTR4_CASE_PRESERVING] = nfsd4_encode_fattr4__true,
3429 [FATTR4_CHOWN_RESTRICTED] = nfsd4_encode_fattr4__true,
3430 [FATTR4_FILEHANDLE] = nfsd4_encode_fattr4_filehandle,
3431 [FATTR4_FILEID] = nfsd4_encode_fattr4_fileid,
3432 [FATTR4_FILES_AVAIL] = nfsd4_encode_fattr4_files_avail,
3433 [FATTR4_FILES_FREE] = nfsd4_encode_fattr4_files_free,
3434 [FATTR4_FILES_TOTAL] = nfsd4_encode_fattr4_files_total,
3435 [FATTR4_FS_LOCATIONS] = nfsd4_encode_fattr4_fs_locations,
3436 [FATTR4_HIDDEN] = nfsd4_encode_fattr4__noop,
3437 [FATTR4_HOMOGENEOUS] = nfsd4_encode_fattr4__true,
3438 [FATTR4_MAXFILESIZE] = nfsd4_encode_fattr4_maxfilesize,
3439 [FATTR4_MAXLINK] = nfsd4_encode_fattr4_maxlink,
3440 [FATTR4_MAXNAME] = nfsd4_encode_fattr4_maxname,
3441 [FATTR4_MAXREAD] = nfsd4_encode_fattr4_maxread,
3442 [FATTR4_MAXWRITE] = nfsd4_encode_fattr4_maxwrite,
3443 [FATTR4_MIMETYPE] = nfsd4_encode_fattr4__noop,
3444 [FATTR4_MODE] = nfsd4_encode_fattr4_mode,
3445 [FATTR4_NO_TRUNC] = nfsd4_encode_fattr4__true,
3446 [FATTR4_NUMLINKS] = nfsd4_encode_fattr4_numlinks,
3447 [FATTR4_OWNER] = nfsd4_encode_fattr4_owner,
3448 [FATTR4_OWNER_GROUP] = nfsd4_encode_fattr4_owner_group,
3449 [FATTR4_QUOTA_AVAIL_HARD] = nfsd4_encode_fattr4__noop,
3450 [FATTR4_QUOTA_AVAIL_SOFT] = nfsd4_encode_fattr4__noop,
3451 [FATTR4_QUOTA_USED] = nfsd4_encode_fattr4__noop,
3452 [FATTR4_RAWDEV] = nfsd4_encode_fattr4_rawdev,
3453 [FATTR4_SPACE_AVAIL] = nfsd4_encode_fattr4_space_avail,
3454 [FATTR4_SPACE_FREE] = nfsd4_encode_fattr4_space_free,
3455 [FATTR4_SPACE_TOTAL] = nfsd4_encode_fattr4_space_total,
3456 [FATTR4_SPACE_USED] = nfsd4_encode_fattr4_space_used,
3457 [FATTR4_SYSTEM] = nfsd4_encode_fattr4__noop,
3458 [FATTR4_TIME_ACCESS] = nfsd4_encode_fattr4_time_access,
3459 [FATTR4_TIME_ACCESS_SET] = nfsd4_encode_fattr4__noop,
3460 [FATTR4_TIME_BACKUP] = nfsd4_encode_fattr4__noop,
3461 [FATTR4_TIME_CREATE] = nfsd4_encode_fattr4_time_create,
3462 [FATTR4_TIME_DELTA] = nfsd4_encode_fattr4_time_delta,
3463 [FATTR4_TIME_METADATA] = nfsd4_encode_fattr4_time_metadata,
3464 [FATTR4_TIME_MODIFY] = nfsd4_encode_fattr4_time_modify,
3465 [FATTR4_TIME_MODIFY_SET] = nfsd4_encode_fattr4__noop,
3466 [FATTR4_MOUNTED_ON_FILEID] = nfsd4_encode_fattr4_mounted_on_fileid,
3467 [FATTR4_DIR_NOTIF_DELAY] = nfsd4_encode_fattr4__noop,
3468 [FATTR4_DIRENT_NOTIF_DELAY] = nfsd4_encode_fattr4__noop,
3469 [FATTR4_DACL] = nfsd4_encode_fattr4__noop,
3470 [FATTR4_SACL] = nfsd4_encode_fattr4__noop,
3471 [FATTR4_CHANGE_POLICY] = nfsd4_encode_fattr4__noop,
3472 [FATTR4_FS_STATUS] = nfsd4_encode_fattr4__noop,
3474 #ifdef CONFIG_NFSD_PNFS
3475 [FATTR4_FS_LAYOUT_TYPES] = nfsd4_encode_fattr4_fs_layout_types,
3476 [FATTR4_LAYOUT_HINT] = nfsd4_encode_fattr4__noop,
3477 [FATTR4_LAYOUT_TYPES] = nfsd4_encode_fattr4_layout_types,
3478 [FATTR4_LAYOUT_BLKSIZE] = nfsd4_encode_fattr4_layout_blksize,
3479 [FATTR4_LAYOUT_ALIGNMENT] = nfsd4_encode_fattr4__noop,
3481 [FATTR4_FS_LAYOUT_TYPES] = nfsd4_encode_fattr4__noop,
3482 [FATTR4_LAYOUT_HINT] = nfsd4_encode_fattr4__noop,
3483 [FATTR4_LAYOUT_TYPES] = nfsd4_encode_fattr4__noop,
3484 [FATTR4_LAYOUT_BLKSIZE] = nfsd4_encode_fattr4__noop,
3485 [FATTR4_LAYOUT_ALIGNMENT] = nfsd4_encode_fattr4__noop,
3488 [FATTR4_FS_LOCATIONS_INFO] = nfsd4_encode_fattr4__noop,
3489 [FATTR4_MDSTHRESHOLD] = nfsd4_encode_fattr4__noop,
3490 [FATTR4_RETENTION_GET] = nfsd4_encode_fattr4__noop,
3491 [FATTR4_RETENTION_SET] = nfsd4_encode_fattr4__noop,
3492 [FATTR4_RETENTEVT_GET] = nfsd4_encode_fattr4__noop,
3493 [FATTR4_RETENTEVT_SET] = nfsd4_encode_fattr4__noop,
3494 [FATTR4_RETENTION_HOLD] = nfsd4_encode_fattr4__noop,
3495 [FATTR4_MODE_SET_MASKED] = nfsd4_encode_fattr4__noop,
3496 [FATTR4_SUPPATTR_EXCLCREAT] = nfsd4_encode_fattr4_suppattr_exclcreat,
3497 [FATTR4_FS_CHARSET_CAP] = nfsd4_encode_fattr4__noop,
3498 [FATTR4_CLONE_BLKSIZE] = nfsd4_encode_fattr4__noop,
3499 [FATTR4_SPACE_FREED] = nfsd4_encode_fattr4__noop,
3500 [FATTR4_CHANGE_ATTR_TYPE] = nfsd4_encode_fattr4__noop,
3502 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3503 [FATTR4_SEC_LABEL] = nfsd4_encode_fattr4_sec_label,
3505 [FATTR4_SEC_LABEL] = nfsd4_encode_fattr4__noop,
3508 [FATTR4_MODE_UMASK] = nfsd4_encode_fattr4__noop,
3509 [FATTR4_XATTR_SUPPORT] = nfsd4_encode_fattr4_xattr_support,
3513 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
3517 nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
3518 struct svc_fh *fhp, struct svc_export *exp,
3519 struct dentry *dentry, const u32 *bmval,
3520 int ignore_crossmnt)
3522 DECLARE_BITMAP(attr_bitmap, ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops));
3523 struct nfsd4_fattr_args args;
3524 struct svc_fh *tempfh = NULL;
3525 int starting_len = xdr->buf->len;
3526 __be32 *attrlen_p, status;
3530 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3531 u32 minorversion = resp->cstate.minorversion;
3532 struct path path = {
3533 .mnt = exp->ex_path.mnt,
3537 bool file_modified = false;
3540 WARN_ON_ONCE(bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1);
3541 WARN_ON_ONCE(!nfsd_attrs_supported(minorversion, bmval));
3545 args.dentry = dentry;
3546 args.ignore_crossmnt = (ignore_crossmnt != 0);
3550 * Make a local copy of the attribute bitmap that can be modified.
3552 attrmask[0] = bmval[0];
3553 attrmask[1] = bmval[1];
3554 attrmask[2] = bmval[2];
3556 args.rdattr_err = 0;
3557 if (exp->ex_fslocs.migrated) {
3558 status = fattr_handle_absent_fs(&attrmask[0], &attrmask[1],
3559 &attrmask[2], &args.rdattr_err);
3564 if (attrmask[0] & (FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE)) {
3565 status = nfsd4_deleg_getattr_conflict(rqstp, d_inode(dentry),
3566 &file_modified, &size);
3571 err = vfs_getattr(&path, &args.stat,
3572 STATX_BASIC_STATS | STATX_BTIME | STATX_CHANGE_COOKIE,
3573 AT_STATX_SYNC_AS_STAT);
3579 args.size = args.stat.size;
3581 if (!(args.stat.result_mask & STATX_BTIME))
3582 /* underlying FS does not offer btime so we can't share it */
3583 attrmask[1] &= ~FATTR4_WORD1_TIME_CREATE;
3584 if ((attrmask[0] & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
3585 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
3586 (attrmask[1] & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
3587 FATTR4_WORD1_SPACE_TOTAL))) {
3588 err = vfs_statfs(&path, &args.statfs);
3592 if ((attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) &&
3594 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
3595 status = nfserr_jukebox;
3598 fh_init(tempfh, NFS4_FHSIZE);
3599 status = fh_compose(tempfh, exp, dentry, NULL);
3606 if (attrmask[0] & FATTR4_WORD0_ACL) {
3607 err = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl);
3608 if (err == -EOPNOTSUPP)
3609 attrmask[0] &= ~FATTR4_WORD0_ACL;
3610 else if (err == -EINVAL) {
3611 status = nfserr_attrnotsupp;
3613 } else if (err != 0)
3617 args.contextsupport = false;
3619 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3620 args.context = NULL;
3621 if ((attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) ||
3622 attrmask[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
3623 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
3624 err = security_inode_getsecctx(d_inode(dentry),
3625 &args.context, &args.contextlen);
3628 args.contextsupport = (err == 0);
3629 if (attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) {
3630 if (err == -EOPNOTSUPP)
3631 attrmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3636 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
3639 status = nfsd4_encode_bitmap4(xdr, attrmask[0], attrmask[1],
3645 attrlen_offset = xdr->buf->len;
3646 attrlen_p = xdr_reserve_space(xdr, XDR_UNIT);
3649 bitmap_from_arr32(attr_bitmap, attrmask,
3650 ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops));
3651 for_each_set_bit(bit, attr_bitmap,
3652 ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops)) {
3653 status = nfsd4_enc_fattr4_encode_ops[bit](xdr, &args);
3654 if (status != nfs_ok)
3657 *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT);
3661 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3663 security_release_secctx(args.context, args.contextlen);
3664 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
3671 xdr_truncate_encode(xdr, starting_len);
3674 status = nfserrno(err);
3677 status = nfserr_resource;
3681 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3682 struct xdr_buf *buf, __be32 *p, int bytes)
3684 xdr->scratch.iov_len = 0;
3685 memset(buf, 0, sizeof(struct xdr_buf));
3686 buf->head[0].iov_base = p;
3687 buf->head[0].iov_len = 0;
3690 xdr->iov = buf->head;
3692 xdr->end = (void *)p + bytes;
3693 buf->buflen = bytes;
3696 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3697 struct svc_fh *fhp, struct svc_export *exp,
3698 struct dentry *dentry, u32 *bmval,
3699 struct svc_rqst *rqstp, int ignore_crossmnt)
3701 struct xdr_buf dummy;
3702 struct xdr_stream xdr;
3705 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
3706 ret = nfsd4_encode_fattr4(rqstp, &xdr, fhp, exp, dentry, bmval,
3713 * The buffer space for this field was reserved during a previous
3714 * call to nfsd4_encode_entry4().
3716 static void nfsd4_encode_entry4_nfs_cookie4(const struct nfsd4_readdir *readdir,
3719 __be64 cookie = cpu_to_be64(offset);
3720 struct xdr_stream *xdr = readdir->xdr;
3722 if (!readdir->cookie_offset)
3724 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, &cookie,
3728 static inline int attributes_need_mount(u32 *bmval)
3730 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3732 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3738 nfsd4_encode_entry4_fattr(struct nfsd4_readdir *cd, const char *name,
3741 struct svc_export *exp = cd->rd_fhp->fh_export;
3742 struct dentry *dentry;
3744 int ignore_crossmnt = 0;
3746 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
3748 return nfserrno(PTR_ERR(dentry));
3752 * In the case of a mountpoint, the client may be asking for
3753 * attributes that are only properties of the underlying filesystem
3754 * as opposed to the cross-mounted file system. In such a case,
3755 * we will not follow the cross mount and will fill the attribtutes
3756 * directly from the mountpoint dentry.
3758 if (nfsd_mountpoint(dentry, exp)) {
3761 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3762 && !attributes_need_mount(cd->rd_bmval)) {
3763 ignore_crossmnt = 1;
3767 * Why the heck aren't we just using nfsd_lookup??
3768 * Different "."/".." handling? Something else?
3769 * At least, add a comment here to explain....
3771 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3773 nfserr = nfserrno(err);
3776 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3782 nfserr = nfsd4_encode_fattr4(cd->rd_rqstp, cd->xdr, NULL, exp, dentry,
3783 cd->rd_bmval, ignore_crossmnt);
3791 nfsd4_encode_entry4_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3796 status = nfsd4_encode_bitmap4(xdr, FATTR4_WORD0_RDATTR_ERROR, 0, 0);
3797 if (status != nfs_ok)
3800 if (xdr_stream_encode_u32(xdr, XDR_UNIT) != XDR_UNIT)
3801 return nfserr_resource;
3803 if (xdr_stream_encode_be32(xdr, nfserr) != XDR_UNIT)
3804 return nfserr_resource;
3809 nfsd4_encode_entry4(void *ccdv, const char *name, int namlen,
3810 loff_t offset, u64 ino, unsigned int d_type)
3812 struct readdir_cd *ccd = ccdv;
3813 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3814 struct xdr_stream *xdr = cd->xdr;
3815 int start_offset = xdr->buf->len;
3817 u32 name_and_cookie;
3819 __be32 nfserr = nfserr_toosmall;
3821 /* In nfsv4, "." and ".." never make it onto the wire.. */
3822 if (name && isdotent(name, namlen)) {
3823 cd->common.err = nfs_ok;
3827 /* Encode the previous entry's cookie value */
3828 nfsd4_encode_entry4_nfs_cookie4(cd, offset);
3830 if (xdr_stream_encode_item_present(xdr) != XDR_UNIT)
3833 /* Reserve send buffer space for this entry's cookie value. */
3834 cookie_offset = xdr->buf->len;
3835 if (nfsd4_encode_nfs_cookie4(xdr, OFFSET_MAX) != nfs_ok)
3837 if (nfsd4_encode_component4(xdr, name, namlen) != nfs_ok)
3839 nfserr = nfsd4_encode_entry4_fattr(cd, name, namlen);
3843 case nfserr_resource:
3844 nfserr = nfserr_toosmall;
3847 xdr_truncate_encode(xdr, start_offset);
3849 case nfserr_jukebox:
3851 * The pseudoroot should only display dentries that lead to
3852 * exports. If we get EJUKEBOX here, then we can't tell whether
3853 * this entry should be included. Just fail the whole READDIR
3854 * with NFS4ERR_DELAY in that case, and hope that the situation
3855 * will resolve itself by the client's next attempt.
3857 if (cd->rd_fhp->fh_export->ex_flags & NFSEXP_V4ROOT)
3862 * If the client requested the RDATTR_ERROR attribute,
3863 * we stuff the error code into this attribute
3864 * and continue. If this attribute was not requested,
3865 * then in accordance with the spec, we fail the
3866 * entire READDIR operation(!)
3868 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3870 if (nfsd4_encode_entry4_rdattr_error(xdr, nfserr)) {
3871 nfserr = nfserr_toosmall;
3875 nfserr = nfserr_toosmall;
3876 entry_bytes = xdr->buf->len - start_offset;
3877 if (entry_bytes > cd->rd_maxcount)
3879 cd->rd_maxcount -= entry_bytes;
3881 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3882 * notes that it could be zero. If it is zero, then the server
3883 * should enforce only the rd_maxcount value.
3885 if (cd->rd_dircount) {
3886 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3887 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3889 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3890 if (!cd->rd_dircount)
3891 cd->rd_maxcount = 0;
3894 cd->cookie_offset = cookie_offset;
3896 cd->common.err = nfs_ok;
3899 xdr_truncate_encode(xdr, start_offset);
3900 cd->common.err = nfserr;
3905 nfsd4_encode_verifier4(struct xdr_stream *xdr, const nfs4_verifier *verf)
3909 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3911 return nfserr_resource;
3912 memcpy(p, verf->data, sizeof(verf->data));
3917 nfsd4_encode_clientid4(struct xdr_stream *xdr, const clientid_t *clientid)
3921 p = xdr_reserve_space(xdr, sizeof(__be64));
3923 return nfserr_resource;
3924 memcpy(p, clientid, sizeof(*clientid));
3928 /* This is a frequently-encoded item; open-coded for speed */
3930 nfsd4_encode_stateid4(struct xdr_stream *xdr, const stateid_t *sid)
3934 p = xdr_reserve_space(xdr, NFS4_STATEID_SIZE);
3936 return nfserr_resource;
3937 *p++ = cpu_to_be32(sid->si_generation);
3938 memcpy(p, &sid->si_opaque, sizeof(sid->si_opaque));
3943 nfsd4_encode_sessionid4(struct xdr_stream *xdr,
3944 const struct nfs4_sessionid *sessionid)
3946 return nfsd4_encode_opaque_fixed(xdr, sessionid->data,
3947 NFS4_MAX_SESSIONID_LEN);
3951 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr,
3952 union nfsd4_op_u *u)
3954 struct nfsd4_access *access = &u->access;
3955 struct xdr_stream *xdr = resp->xdr;
3959 status = nfsd4_encode_uint32_t(xdr, access->ac_supported);
3960 if (status != nfs_ok)
3963 return nfsd4_encode_uint32_t(xdr, access->ac_resp_access);
3966 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3967 union nfsd4_op_u *u)
3969 struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
3970 struct xdr_stream *xdr = resp->xdr;
3973 nfserr = nfsd4_encode_sessionid4(xdr, &bcts->sessionid);
3974 if (nfserr != nfs_ok)
3977 if (xdr_stream_encode_u32(xdr, bcts->dir) != XDR_UNIT)
3978 return nfserr_resource;
3979 /* bctsr_use_conn_in_rdma_mode */
3980 return nfsd4_encode_bool(xdr, false);
3984 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr,
3985 union nfsd4_op_u *u)
3987 struct nfsd4_close *close = &u->close;
3988 struct xdr_stream *xdr = resp->xdr;
3991 return nfsd4_encode_stateid4(xdr, &close->cl_stateid);
3996 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr,
3997 union nfsd4_op_u *u)
3999 struct nfsd4_commit *commit = &u->commit;
4001 return nfsd4_encode_verifier4(resp->xdr, &commit->co_verf);
4005 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr,
4006 union nfsd4_op_u *u)
4008 struct nfsd4_create *create = &u->create;
4009 struct xdr_stream *xdr = resp->xdr;
4012 nfserr = nfsd4_encode_change_info4(xdr, &create->cr_cinfo);
4016 return nfsd4_encode_bitmap4(xdr, create->cr_bmval[0],
4017 create->cr_bmval[1], create->cr_bmval[2]);
4021 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4022 union nfsd4_op_u *u)
4024 struct nfsd4_getattr *getattr = &u->getattr;
4025 struct svc_fh *fhp = getattr->ga_fhp;
4026 struct xdr_stream *xdr = resp->xdr;
4028 /* obj_attributes */
4029 return nfsd4_encode_fattr4(resp->rqstp, xdr, fhp, fhp->fh_export,
4030 fhp->fh_dentry, getattr->ga_bmval, 0);
4034 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr,
4035 union nfsd4_op_u *u)
4037 struct xdr_stream *xdr = resp->xdr;
4038 struct svc_fh *fhp = u->getfh;
4041 return nfsd4_encode_nfs_fh4(xdr, &fhp->fh_handle);
4045 nfsd4_encode_lock_owner4(struct xdr_stream *xdr, const clientid_t *clientid,
4046 const struct xdr_netobj *owner)
4051 status = nfsd4_encode_clientid4(xdr, clientid);
4052 if (status != nfs_ok)
4055 return nfsd4_encode_opaque(xdr, owner->data, owner->len);
4059 nfsd4_encode_lock4denied(struct xdr_stream *xdr,
4060 const struct nfsd4_lock_denied *ld)
4065 status = nfsd4_encode_offset4(xdr, ld->ld_start);
4066 if (status != nfs_ok)
4069 status = nfsd4_encode_length4(xdr, ld->ld_length);
4070 if (status != nfs_ok)
4073 if (xdr_stream_encode_u32(xdr, ld->ld_type) != XDR_UNIT)
4074 return nfserr_resource;
4076 return nfsd4_encode_lock_owner4(xdr, &ld->ld_clientid,
4081 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr,
4082 union nfsd4_op_u *u)
4084 struct nfsd4_lock *lock = &u->lock;
4085 struct xdr_stream *xdr = resp->xdr;
4091 status = nfsd4_encode_stateid4(xdr, &lock->lk_resp_stateid);
4095 status = nfsd4_encode_lock4denied(xdr, &lock->lk_denied);
4100 return status != nfs_ok ? status : nfserr;
4104 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr,
4105 union nfsd4_op_u *u)
4107 struct nfsd4_lockt *lockt = &u->lockt;
4108 struct xdr_stream *xdr = resp->xdr;
4111 if (nfserr == nfserr_denied) {
4113 status = nfsd4_encode_lock4denied(xdr, &lockt->lt_denied);
4114 if (status != nfs_ok)
4121 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr,
4122 union nfsd4_op_u *u)
4124 struct nfsd4_locku *locku = &u->locku;
4125 struct xdr_stream *xdr = resp->xdr;
4128 return nfsd4_encode_stateid4(xdr, &locku->lu_stateid);
4133 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr,
4134 union nfsd4_op_u *u)
4136 struct nfsd4_link *link = &u->link;
4137 struct xdr_stream *xdr = resp->xdr;
4139 return nfsd4_encode_change_info4(xdr, &link->li_cinfo);
4143 * This implementation does not yet support returning an ACE in an
4144 * OPEN that offers a delegation.
4147 nfsd4_encode_open_nfsace4(struct xdr_stream *xdr)
4152 status = nfsd4_encode_acetype4(xdr, NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
4153 if (status != nfs_ok)
4154 return nfserr_resource;
4156 status = nfsd4_encode_aceflag4(xdr, 0);
4157 if (status != nfs_ok)
4158 return nfserr_resource;
4160 status = nfsd4_encode_acemask4(xdr, 0);
4161 if (status != nfs_ok)
4162 return nfserr_resource;
4163 /* who - empty for now */
4164 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
4165 return nfserr_resource;
4170 nfsd4_encode_open_read_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open)
4175 status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
4176 if (status != nfs_ok)
4179 status = nfsd4_encode_bool(xdr, open->op_recall);
4180 if (status != nfs_ok)
4183 return nfsd4_encode_open_nfsace4(xdr);
4187 nfsd4_encode_nfs_space_limit4(struct xdr_stream *xdr, u64 filesize)
4190 if (xdr_stream_encode_u32(xdr, NFS4_LIMIT_SIZE) != XDR_UNIT)
4191 return nfserr_resource;
4193 return nfsd4_encode_uint64_t(xdr, filesize);
4197 nfsd4_encode_open_write_delegation4(struct xdr_stream *xdr,
4198 struct nfsd4_open *open)
4203 status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
4204 if (status != nfs_ok)
4207 status = nfsd4_encode_bool(xdr, open->op_recall);
4208 if (status != nfs_ok)
4211 status = nfsd4_encode_nfs_space_limit4(xdr, 0);
4212 if (status != nfs_ok)
4214 return nfsd4_encode_open_nfsace4(xdr);
4218 nfsd4_encode_open_none_delegation4(struct xdr_stream *xdr,
4219 struct nfsd4_open *open)
4221 __be32 status = nfs_ok;
4224 if (xdr_stream_encode_u32(xdr, open->op_why_no_deleg) != XDR_UNIT)
4225 return nfserr_resource;
4226 switch (open->op_why_no_deleg) {
4227 case WND4_CONTENTION:
4228 /* ond_server_will_push_deleg */
4229 status = nfsd4_encode_bool(xdr, false);
4232 /* ond_server_will_signal_avail */
4233 status = nfsd4_encode_bool(xdr, false);
4239 nfsd4_encode_open_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open)
4243 /* delegation_type */
4244 if (xdr_stream_encode_u32(xdr, open->op_delegate_type) != XDR_UNIT)
4245 return nfserr_resource;
4246 switch (open->op_delegate_type) {
4247 case NFS4_OPEN_DELEGATE_NONE:
4250 case NFS4_OPEN_DELEGATE_READ:
4252 status = nfsd4_encode_open_read_delegation4(xdr, open);
4254 case NFS4_OPEN_DELEGATE_WRITE:
4256 status = nfsd4_encode_open_write_delegation4(xdr, open);
4258 case NFS4_OPEN_DELEGATE_NONE_EXT:
4260 status = nfsd4_encode_open_none_delegation4(xdr, open);
4263 status = nfserr_serverfault;
4270 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr,
4271 union nfsd4_op_u *u)
4273 struct nfsd4_open *open = &u->open;
4274 struct xdr_stream *xdr = resp->xdr;
4277 nfserr = nfsd4_encode_stateid4(xdr, &open->op_stateid);
4278 if (nfserr != nfs_ok)
4281 nfserr = nfsd4_encode_change_info4(xdr, &open->op_cinfo);
4282 if (nfserr != nfs_ok)
4285 nfserr = nfsd4_encode_uint32_t(xdr, open->op_rflags);
4286 if (nfserr != nfs_ok)
4289 nfserr = nfsd4_encode_bitmap4(xdr, open->op_bmval[0],
4290 open->op_bmval[1], open->op_bmval[2]);
4291 if (nfserr != nfs_ok)
4294 return nfsd4_encode_open_delegation4(xdr, open);
4298 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr,
4299 union nfsd4_op_u *u)
4301 struct nfsd4_open_confirm *oc = &u->open_confirm;
4302 struct xdr_stream *xdr = resp->xdr;
4305 return nfsd4_encode_stateid4(xdr, &oc->oc_resp_stateid);
4309 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr,
4310 union nfsd4_op_u *u)
4312 struct nfsd4_open_downgrade *od = &u->open_downgrade;
4313 struct xdr_stream *xdr = resp->xdr;
4316 return nfsd4_encode_stateid4(xdr, &od->od_stateid);
4320 * The operation of this function assumes that this is the only
4321 * READ operation in the COMPOUND. If there are multiple READs,
4322 * we use nfsd4_encode_readv().
4324 static __be32 nfsd4_encode_splice_read(
4325 struct nfsd4_compoundres *resp,
4326 struct nfsd4_read *read,
4327 struct file *file, unsigned long maxcount)
4329 struct xdr_stream *xdr = resp->xdr;
4330 struct xdr_buf *buf = xdr->buf;
4331 int status, space_left;
4335 * Make sure there is room at the end of buf->head for
4336 * svcxdr_encode_opaque_pages() to create a tail buffer
4337 * to XDR-pad the payload.
4339 if (xdr->iov != xdr->buf->head || xdr->end - xdr->p < 1)
4340 return nfserr_resource;
4342 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
4343 file, read->rd_offset, &maxcount,
4345 read->rd_length = maxcount;
4348 svcxdr_encode_opaque_pages(read->rd_rqstp, xdr, buf->pages,
4349 buf->page_base, maxcount);
4350 status = svc_encode_result_payload(read->rd_rqstp,
4351 buf->head[0].iov_len, maxcount);
4353 nfserr = nfserrno(status);
4358 * Prepare to encode subsequent operations.
4360 * xdr_truncate_encode() is not safe to use after a successful
4361 * splice read has been done, so the following stream
4362 * manipulations are open-coded.
4364 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
4365 buf->buflen - buf->len);
4366 buf->buflen = buf->len + space_left;
4367 xdr->end = (__be32 *)((void *)xdr->end + space_left);
4373 * nfsd_splice_actor may have already messed with the
4374 * page length; reset it so as not to confuse
4375 * xdr_truncate_encode in our caller.
4381 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
4382 struct nfsd4_read *read,
4383 struct file *file, unsigned long maxcount)
4385 struct xdr_stream *xdr = resp->xdr;
4386 unsigned int base = xdr->buf->page_len & ~PAGE_MASK;
4387 unsigned int starting_len = xdr->buf->len;
4388 __be32 zero = xdr_zero;
4391 if (xdr_reserve_space_vec(xdr, maxcount) < 0)
4392 return nfserr_resource;
4394 nfserr = nfsd_iter_read(resp->rqstp, read->rd_fhp, file,
4395 read->rd_offset, &maxcount, base,
4397 read->rd_length = maxcount;
4400 if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount))
4402 xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount));
4404 write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &zero,
4405 xdr_pad_size(maxcount));
4410 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
4411 union nfsd4_op_u *u)
4413 struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp;
4414 struct nfsd4_read *read = &u->read;
4415 struct xdr_stream *xdr = resp->xdr;
4416 int starting_len = xdr->buf->len;
4417 bool splice_ok = argp->splice_ok;
4418 unsigned long maxcount;
4424 file = read->rd_nf->nf_file;
4426 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
4428 WARN_ON_ONCE(splice_ok);
4429 return nfserr_resource;
4431 if (resp->xdr->buf->page_len && splice_ok) {
4433 return nfserr_serverfault;
4435 xdr_commit_encode(xdr);
4437 maxcount = min_t(unsigned long, read->rd_length,
4438 (xdr->buf->buflen - xdr->buf->len));
4440 if (file->f_op->splice_read && splice_ok)
4441 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
4443 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
4445 xdr_truncate_encode(xdr, starting_len);
4449 p = xdr_encode_bool(p, read->rd_eof);
4450 *p = cpu_to_be32(read->rd_length);
4455 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr,
4456 union nfsd4_op_u *u)
4458 struct nfsd4_readlink *readlink = &u->readlink;
4459 __be32 *p, *maxcount_p, zero = xdr_zero;
4460 struct xdr_stream *xdr = resp->xdr;
4461 int length_offset = xdr->buf->len;
4462 int maxcount, status;
4464 maxcount_p = xdr_reserve_space(xdr, XDR_UNIT);
4466 return nfserr_resource;
4467 maxcount = PAGE_SIZE;
4469 p = xdr_reserve_space(xdr, maxcount);
4471 return nfserr_resource;
4473 * XXX: By default, vfs_readlink() will truncate symlinks if they
4474 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4475 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4476 * that truncation occurred, and return NFS4ERR_RESOURCE.
4478 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4479 (char *)p, &maxcount);
4480 if (nfserr == nfserr_isdir)
4481 nfserr = nfserr_inval;
4484 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4487 nfserr = nfserrno(status);
4490 *maxcount_p = cpu_to_be32(maxcount);
4491 xdr_truncate_encode(xdr, length_offset + 4 + xdr_align_size(maxcount));
4492 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero,
4493 xdr_pad_size(maxcount));
4497 xdr_truncate_encode(xdr, length_offset);
4501 static __be32 nfsd4_encode_dirlist4(struct xdr_stream *xdr,
4502 struct nfsd4_readdir *readdir,
4505 int bytes_left, maxcount, starting_len = xdr->buf->len;
4510 * Number of bytes left for directory entries allowing for the
4511 * final 8 bytes of the readdir and a following failed op.
4513 bytes_left = xdr->buf->buflen - xdr->buf->len -
4514 COMPOUND_ERR_SLACK_SPACE - XDR_UNIT * 2;
4516 return nfserr_resource;
4517 maxcount = min_t(u32, readdir->rd_maxcount, max_payload);
4520 * The RFC defines rd_maxcount as the size of the
4521 * READDIR4resok structure, which includes the verifier
4522 * and the 8 bytes encoded at the end of this function.
4524 if (maxcount < XDR_UNIT * 4)
4525 return nfserr_toosmall;
4526 maxcount = min_t(int, maxcount - XDR_UNIT * 4, bytes_left);
4528 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0 */
4529 if (!readdir->rd_dircount)
4530 readdir->rd_dircount = max_payload;
4534 readdir->rd_maxcount = maxcount;
4535 readdir->common.err = 0;
4536 readdir->cookie_offset = 0;
4537 offset = readdir->rd_cookie;
4538 status = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, &offset,
4539 &readdir->common, nfsd4_encode_entry4);
4542 if (readdir->common.err == nfserr_toosmall &&
4543 xdr->buf->len == starting_len) {
4544 /* No entries were encoded. Which limit did we hit? */
4545 if (maxcount - XDR_UNIT * 4 < bytes_left)
4546 /* It was the fault of rd_maxcount */
4547 return nfserr_toosmall;
4548 /* We ran out of buffer space */
4549 return nfserr_resource;
4551 /* Encode the final entry's cookie value */
4552 nfsd4_encode_entry4_nfs_cookie4(readdir, offset);
4553 /* No entries follow */
4554 if (xdr_stream_encode_item_absent(xdr) != XDR_UNIT)
4555 return nfserr_resource;
4558 return nfsd4_encode_bool(xdr, readdir->common.err == nfserr_eof);
4562 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr,
4563 union nfsd4_op_u *u)
4565 struct nfsd4_readdir *readdir = &u->readdir;
4566 struct xdr_stream *xdr = resp->xdr;
4567 int starting_len = xdr->buf->len;
4570 nfserr = nfsd4_encode_verifier4(xdr, &readdir->rd_verf);
4571 if (nfserr != nfs_ok)
4575 nfserr = nfsd4_encode_dirlist4(xdr, readdir, svc_max_payload(resp->rqstp));
4576 if (nfserr != nfs_ok)
4577 xdr_truncate_encode(xdr, starting_len);
4582 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr,
4583 union nfsd4_op_u *u)
4585 struct nfsd4_remove *remove = &u->remove;
4586 struct xdr_stream *xdr = resp->xdr;
4588 return nfsd4_encode_change_info4(xdr, &remove->rm_cinfo);
4592 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr,
4593 union nfsd4_op_u *u)
4595 struct nfsd4_rename *rename = &u->rename;
4596 struct xdr_stream *xdr = resp->xdr;
4598 nfserr = nfsd4_encode_change_info4(xdr, &rename->rn_sinfo);
4601 return nfsd4_encode_change_info4(xdr, &rename->rn_tinfo);
4605 nfsd4_encode_rpcsec_gss_info(struct xdr_stream *xdr,
4606 struct rpcsec_gss_info *info)
4611 if (xdr_stream_encode_opaque(xdr, info->oid.data, info->oid.len) < 0)
4612 return nfserr_resource;
4614 status = nfsd4_encode_qop4(xdr, info->qop);
4615 if (status != nfs_ok)
4618 if (xdr_stream_encode_u32(xdr, info->service) != XDR_UNIT)
4619 return nfserr_resource;
4625 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
4627 u32 i, nflavs, supported;
4628 struct exp_flavor_info *flavs;
4629 struct exp_flavor_info def_flavs[2];
4630 static bool report = true;
4634 if (exp->ex_nflavors) {
4635 flavs = exp->ex_flavors;
4636 nflavs = exp->ex_nflavors;
4637 } else { /* Handling of some defaults in absence of real secinfo: */
4639 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4641 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4642 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4643 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4645 flavs[0].pseudoflavor
4646 = svcauth_gss_flavor(exp->ex_client);
4649 flavs[0].pseudoflavor
4650 = exp->ex_client->flavour->flavour;
4655 flavorsp = xdr_reserve_space(xdr, XDR_UNIT);
4657 return nfserr_resource;
4659 for (i = 0; i < nflavs; i++) {
4660 rpc_authflavor_t pf = flavs[i].pseudoflavor;
4661 struct rpcsec_gss_info info;
4663 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4667 status = nfsd4_encode_uint32_t(xdr, RPC_AUTH_GSS);
4668 if (status != nfs_ok)
4671 status = nfsd4_encode_rpcsec_gss_info(xdr, &info);
4672 if (status != nfs_ok)
4674 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4678 status = nfsd4_encode_uint32_t(xdr, pf);
4679 if (status != nfs_ok)
4683 pr_warn("NFS: SECINFO: security flavor %u "
4684 "is not supported\n", pf);
4688 if (nflavs != supported)
4690 *flavorsp = cpu_to_be32(supported);
4695 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4696 union nfsd4_op_u *u)
4698 struct nfsd4_secinfo *secinfo = &u->secinfo;
4699 struct xdr_stream *xdr = resp->xdr;
4701 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
4705 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4706 union nfsd4_op_u *u)
4708 struct nfsd4_secinfo_no_name *secinfo = &u->secinfo_no_name;
4709 struct xdr_stream *xdr = resp->xdr;
4711 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
4715 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4716 union nfsd4_op_u *u)
4718 struct nfsd4_setattr *setattr = &u->setattr;
4724 status = nfsd4_encode_bitmap4(resp->xdr, setattr->sa_bmval[0],
4725 setattr->sa_bmval[1],
4726 setattr->sa_bmval[2]);
4730 status = nfsd4_encode_bitmap4(resp->xdr, 0, 0, 0);
4732 return status != nfs_ok ? status : nfserr;
4736 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr,
4737 union nfsd4_op_u *u)
4739 struct nfsd4_setclientid *scd = &u->setclientid;
4740 struct xdr_stream *xdr = resp->xdr;
4743 nfserr = nfsd4_encode_clientid4(xdr, &scd->se_clientid);
4744 if (nfserr != nfs_ok)
4746 nfserr = nfsd4_encode_verifier4(xdr, &scd->se_confirm);
4747 } else if (nfserr == nfserr_clid_inuse) {
4748 /* empty network id */
4749 if (xdr_stream_encode_u32(xdr, 0) < 0) {
4750 nfserr = nfserr_resource;
4753 /* empty universal address */
4754 if (xdr_stream_encode_u32(xdr, 0) < 0) {
4755 nfserr = nfserr_resource;
4764 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr,
4765 union nfsd4_op_u *u)
4767 struct nfsd4_write *write = &u->write;
4768 struct xdr_stream *xdr = resp->xdr;
4771 nfserr = nfsd4_encode_count4(xdr, write->wr_bytes_written);
4775 if (xdr_stream_encode_u32(xdr, write->wr_how_written) != XDR_UNIT)
4776 return nfserr_resource;
4778 return nfsd4_encode_verifier4(xdr, &write->wr_verifier);
4782 nfsd4_encode_state_protect_ops4(struct xdr_stream *xdr,
4783 struct nfsd4_exchange_id *exid)
4787 /* spo_must_enforce */
4788 status = nfsd4_encode_bitmap4(xdr, exid->spo_must_enforce[0],
4789 exid->spo_must_enforce[1],
4790 exid->spo_must_enforce[2]);
4791 if (status != nfs_ok)
4793 /* spo_must_allow */
4794 return nfsd4_encode_bitmap4(xdr, exid->spo_must_allow[0],
4795 exid->spo_must_allow[1],
4796 exid->spo_must_allow[2]);
4800 nfsd4_encode_state_protect4_r(struct xdr_stream *xdr, struct nfsd4_exchange_id *exid)
4804 if (xdr_stream_encode_u32(xdr, exid->spa_how) != XDR_UNIT)
4805 return nfserr_resource;
4806 switch (exid->spa_how) {
4812 status = nfsd4_encode_state_protect_ops4(xdr, exid);
4815 status = nfserr_serverfault;
4821 nfsd4_encode_server_owner4(struct xdr_stream *xdr, struct svc_rqst *rqstp)
4823 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4827 status = nfsd4_encode_uint64_t(xdr, 0);
4828 if (status != nfs_ok)
4831 return nfsd4_encode_opaque(xdr, nn->nfsd_name, strlen(nn->nfsd_name));
4835 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
4836 union nfsd4_op_u *u)
4838 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
4839 struct nfsd4_exchange_id *exid = &u->exchange_id;
4840 struct xdr_stream *xdr = resp->xdr;
4843 nfserr = nfsd4_encode_clientid4(xdr, &exid->clientid);
4844 if (nfserr != nfs_ok)
4846 /* eir_sequenceid */
4847 nfserr = nfsd4_encode_sequenceid4(xdr, exid->seqid);
4848 if (nfserr != nfs_ok)
4851 nfserr = nfsd4_encode_uint32_t(xdr, exid->flags);
4852 if (nfserr != nfs_ok)
4854 /* eir_state_protect */
4855 nfserr = nfsd4_encode_state_protect4_r(xdr, exid);
4856 if (nfserr != nfs_ok)
4858 /* eir_server_owner */
4859 nfserr = nfsd4_encode_server_owner4(xdr, resp->rqstp);
4860 if (nfserr != nfs_ok)
4862 /* eir_server_scope */
4863 nfserr = nfsd4_encode_opaque(xdr, nn->nfsd_name,
4864 strlen(nn->nfsd_name));
4865 if (nfserr != nfs_ok)
4867 /* eir_server_impl_id<1> */
4868 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
4869 return nfserr_resource;
4875 nfsd4_encode_channel_attrs4(struct xdr_stream *xdr,
4876 const struct nfsd4_channel_attrs *attrs)
4880 /* ca_headerpadsize */
4881 status = nfsd4_encode_count4(xdr, 0);
4882 if (status != nfs_ok)
4884 /* ca_maxrequestsize */
4885 status = nfsd4_encode_count4(xdr, attrs->maxreq_sz);
4886 if (status != nfs_ok)
4888 /* ca_maxresponsesize */
4889 status = nfsd4_encode_count4(xdr, attrs->maxresp_sz);
4890 if (status != nfs_ok)
4892 /* ca_maxresponsesize_cached */
4893 status = nfsd4_encode_count4(xdr, attrs->maxresp_cached);
4894 if (status != nfs_ok)
4896 /* ca_maxoperations */
4897 status = nfsd4_encode_count4(xdr, attrs->maxops);
4898 if (status != nfs_ok)
4900 /* ca_maxrequests */
4901 status = nfsd4_encode_count4(xdr, attrs->maxreqs);
4902 if (status != nfs_ok)
4904 /* ca_rdma_ird<1> */
4905 if (xdr_stream_encode_u32(xdr, attrs->nr_rdma_attrs) != XDR_UNIT)
4906 return nfserr_resource;
4907 if (attrs->nr_rdma_attrs)
4908 return nfsd4_encode_uint32_t(xdr, attrs->rdma_attrs);
4913 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4914 union nfsd4_op_u *u)
4916 struct nfsd4_create_session *sess = &u->create_session;
4917 struct xdr_stream *xdr = resp->xdr;
4920 nfserr = nfsd4_encode_sessionid4(xdr, &sess->sessionid);
4921 if (nfserr != nfs_ok)
4924 nfserr = nfsd4_encode_sequenceid4(xdr, sess->seqid);
4925 if (nfserr != nfs_ok)
4928 nfserr = nfsd4_encode_uint32_t(xdr, sess->flags);
4929 if (nfserr != nfs_ok)
4931 /* csr_fore_chan_attrs */
4932 nfserr = nfsd4_encode_channel_attrs4(xdr, &sess->fore_channel);
4933 if (nfserr != nfs_ok)
4935 /* csr_back_chan_attrs */
4936 return nfsd4_encode_channel_attrs4(xdr, &sess->back_channel);
4940 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4941 union nfsd4_op_u *u)
4943 struct nfsd4_sequence *seq = &u->sequence;
4944 struct xdr_stream *xdr = resp->xdr;
4947 nfserr = nfsd4_encode_sessionid4(xdr, &seq->sessionid);
4948 if (nfserr != nfs_ok)
4951 nfserr = nfsd4_encode_sequenceid4(xdr, seq->seqid);
4952 if (nfserr != nfs_ok)
4955 nfserr = nfsd4_encode_slotid4(xdr, seq->slotid);
4956 if (nfserr != nfs_ok)
4958 /* Note slotid's are numbered from zero: */
4959 /* sr_highest_slotid */
4960 nfserr = nfsd4_encode_slotid4(xdr, seq->maxslots - 1);
4961 if (nfserr != nfs_ok)
4963 /* sr_target_highest_slotid */
4964 nfserr = nfsd4_encode_slotid4(xdr, seq->maxslots - 1);
4965 if (nfserr != nfs_ok)
4967 /* sr_status_flags */
4968 nfserr = nfsd4_encode_uint32_t(xdr, seq->status_flags);
4969 if (nfserr != nfs_ok)
4972 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4977 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4978 union nfsd4_op_u *u)
4980 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
4981 struct nfsd4_test_stateid_id *stateid, *next;
4982 struct xdr_stream *xdr = resp->xdr;
4984 /* tsr_status_codes<> */
4985 if (xdr_stream_encode_u32(xdr, test_stateid->ts_num_ids) != XDR_UNIT)
4986 return nfserr_resource;
4987 list_for_each_entry_safe(stateid, next,
4988 &test_stateid->ts_stateid_list, ts_id_list) {
4989 if (xdr_stream_encode_be32(xdr, stateid->ts_id_status) != XDR_UNIT)
4990 return nfserr_resource;
4996 nfsd4_encode_get_dir_delegation(struct nfsd4_compoundres *resp, __be32 nfserr,
4997 union nfsd4_op_u *u)
4999 struct nfsd4_get_dir_delegation *gdd = &u->get_dir_delegation;
5000 struct xdr_stream *xdr = resp->xdr;
5001 __be32 status = nfserr_resource;
5003 switch(gdd->gddrnf_status) {
5005 if (xdr_stream_encode_u32(xdr, GDD4_OK) != XDR_UNIT)
5007 status = nfsd4_encode_verifier4(xdr, &gdd->gddr_cookieverf);
5010 status = nfsd4_encode_stateid4(xdr, &gdd->gddr_stateid);
5013 status = nfsd4_encode_bitmap4(xdr, gdd->gddr_notification[0], 0, 0);
5016 status = nfsd4_encode_bitmap4(xdr, gdd->gddr_child_attributes[0],
5017 gdd->gddr_child_attributes[1],
5018 gdd->gddr_child_attributes[2]);
5021 status = nfsd4_encode_bitmap4(xdr, gdd->gddr_dir_attributes[0],
5022 gdd->gddr_dir_attributes[1],
5023 gdd->gddr_dir_attributes[2]);
5026 pr_warn("nfsd: bad gddrnf_status (%u)\n", gdd->gddrnf_status);
5027 gdd->gddrnf_will_signal_deleg_avail = 0;
5030 if (xdr_stream_encode_u32(xdr, GDD4_UNAVAIL) != XDR_UNIT)
5032 status = nfsd4_encode_bool(xdr, gdd->gddrnf_will_signal_deleg_avail);
5038 #ifdef CONFIG_NFSD_PNFS
5040 nfsd4_encode_device_addr4(struct xdr_stream *xdr,
5041 const struct nfsd4_getdeviceinfo *gdev)
5043 u32 needed_len, starting_len = xdr->buf->len;
5044 const struct nfsd4_layout_ops *ops;
5047 /* da_layout_type */
5048 if (xdr_stream_encode_u32(xdr, gdev->gd_layout_type) != XDR_UNIT)
5049 return nfserr_resource;
5051 ops = nfsd4_layout_ops[gdev->gd_layout_type];
5052 status = ops->encode_getdeviceinfo(xdr, gdev);
5053 if (status != nfs_ok) {
5055 * Don't burden the layout drivers with enforcing
5056 * gd_maxcount. Just tell the client to come back
5057 * with a bigger buffer if it's not enough.
5059 if (xdr->buf->len + XDR_UNIT > gdev->gd_maxcount)
5067 needed_len = xdr->buf->len + XDR_UNIT; /* notifications */
5068 xdr_truncate_encode(xdr, starting_len);
5070 status = nfsd4_encode_count4(xdr, needed_len);
5071 if (status != nfs_ok)
5073 return nfserr_toosmall;
5077 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
5078 union nfsd4_op_u *u)
5080 struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo;
5081 struct xdr_stream *xdr = resp->xdr;
5083 /* gdir_device_addr */
5084 nfserr = nfsd4_encode_device_addr4(xdr, gdev);
5087 /* gdir_notification */
5088 return nfsd4_encode_bitmap4(xdr, gdev->gd_notify_types, 0, 0);
5092 nfsd4_encode_layout4(struct xdr_stream *xdr, const struct nfsd4_layoutget *lgp)
5094 const struct nfsd4_layout_ops *ops = nfsd4_layout_ops[lgp->lg_layout_type];
5098 status = nfsd4_encode_offset4(xdr, lgp->lg_seg.offset);
5099 if (status != nfs_ok)
5102 status = nfsd4_encode_length4(xdr, lgp->lg_seg.length);
5103 if (status != nfs_ok)
5106 if (xdr_stream_encode_u32(xdr, lgp->lg_seg.iomode) != XDR_UNIT)
5107 return nfserr_resource;
5109 if (xdr_stream_encode_u32(xdr, lgp->lg_layout_type) != XDR_UNIT)
5110 return nfserr_resource;
5111 return ops->encode_layoutget(xdr, lgp);
5115 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
5116 union nfsd4_op_u *u)
5118 struct nfsd4_layoutget *lgp = &u->layoutget;
5119 struct xdr_stream *xdr = resp->xdr;
5121 /* logr_return_on_close */
5122 nfserr = nfsd4_encode_bool(xdr, true);
5123 if (nfserr != nfs_ok)
5126 nfserr = nfsd4_encode_stateid4(xdr, &lgp->lg_sid);
5127 if (nfserr != nfs_ok)
5130 if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT)
5131 return nfserr_resource;
5132 return nfsd4_encode_layout4(xdr, lgp);
5136 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
5137 union nfsd4_op_u *u)
5139 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
5140 struct xdr_stream *xdr = resp->xdr;
5142 /* ns_sizechanged */
5143 nfserr = nfsd4_encode_bool(xdr, lcp->lc_size_chg);
5144 if (nfserr != nfs_ok)
5146 if (lcp->lc_size_chg)
5148 return nfsd4_encode_length4(xdr, lcp->lc_newsize);
5153 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
5154 union nfsd4_op_u *u)
5156 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
5157 struct xdr_stream *xdr = resp->xdr;
5160 nfserr = nfsd4_encode_bool(xdr, lrp->lrs_present);
5161 if (nfserr != nfs_ok)
5163 if (lrp->lrs_present)
5165 return nfsd4_encode_stateid4(xdr, &lrp->lr_sid);
5168 #endif /* CONFIG_NFSD_PNFS */
5171 nfsd4_encode_write_response4(struct xdr_stream *xdr,
5172 const struct nfsd4_copy *copy)
5174 const struct nfsd42_write_res *write = ©->cp_res;
5175 u32 count = nfsd4_copy_is_sync(copy) ? 0 : 1;
5178 /* wr_callback_id<1> */
5179 if (xdr_stream_encode_u32(xdr, count) != XDR_UNIT)
5180 return nfserr_resource;
5182 status = nfsd4_encode_stateid4(xdr, &write->cb_stateid);
5183 if (status != nfs_ok)
5188 status = nfsd4_encode_length4(xdr, write->wr_bytes_written);
5189 if (status != nfs_ok)
5192 if (xdr_stream_encode_u32(xdr, write->wr_stable_how) != XDR_UNIT)
5193 return nfserr_resource;
5195 return nfsd4_encode_verifier4(xdr, &write->wr_verifier);
5198 static __be32 nfsd4_encode_copy_requirements4(struct xdr_stream *xdr,
5199 const struct nfsd4_copy *copy)
5203 /* cr_consecutive */
5204 status = nfsd4_encode_bool(xdr, true);
5205 if (status != nfs_ok)
5207 /* cr_synchronous */
5208 return nfsd4_encode_bool(xdr, nfsd4_copy_is_sync(copy));
5212 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
5213 union nfsd4_op_u *u)
5215 struct nfsd4_copy *copy = &u->copy;
5217 nfserr = nfsd4_encode_write_response4(resp->xdr, copy);
5218 if (nfserr != nfs_ok)
5220 return nfsd4_encode_copy_requirements4(resp->xdr, copy);
5224 nfsd4_encode_netloc4(struct xdr_stream *xdr, const struct nl4_server *ns)
5228 if (xdr_stream_encode_u32(xdr, ns->nl4_type) != XDR_UNIT)
5229 return nfserr_resource;
5230 switch (ns->nl4_type) {
5233 status = nfsd4_encode_netaddr4(xdr, &ns->u.nl4_addr);
5236 status = nfserr_serverfault;
5242 nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
5243 union nfsd4_op_u *u)
5245 struct nfsd4_copy_notify *cn = &u->copy_notify;
5246 struct xdr_stream *xdr = resp->xdr;
5248 /* cnr_lease_time */
5249 nfserr = nfsd4_encode_nfstime4(xdr, &cn->cpn_lease_time);
5253 nfserr = nfsd4_encode_stateid4(xdr, &cn->cpn_cnr_stateid);
5256 /* cnr_source_server<> */
5257 if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT)
5258 return nfserr_resource;
5259 return nfsd4_encode_netloc4(xdr, cn->cpn_src);
5263 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
5264 union nfsd4_op_u *u)
5266 struct nfsd4_offload_status *os = &u->offload_status;
5267 struct xdr_stream *xdr = resp->xdr;
5270 nfserr = nfsd4_encode_length4(xdr, os->count);
5271 if (nfserr != nfs_ok)
5273 /* osr_complete<1> */
5274 if (os->completed) {
5275 if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT)
5276 return nfserr_resource;
5277 if (xdr_stream_encode_be32(xdr, os->status) != XDR_UNIT)
5278 return nfserr_resource;
5279 } else if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
5280 return nfserr_resource;
5285 nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
5286 struct nfsd4_read *read)
5288 struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp;
5289 struct file *file = read->rd_nf->nf_file;
5290 struct xdr_stream *xdr = resp->xdr;
5291 bool splice_ok = argp->splice_ok;
5292 unsigned long maxcount;
5295 /* Content type, offset, byte count */
5296 p = xdr_reserve_space(xdr, 4 + 8 + 4);
5299 if (resp->xdr->buf->page_len && splice_ok) {
5300 WARN_ON_ONCE(splice_ok);
5301 return nfserr_serverfault;
5304 maxcount = min_t(unsigned long, read->rd_length,
5305 (xdr->buf->buflen - xdr->buf->len));
5307 if (file->f_op->splice_read && splice_ok)
5308 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
5310 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
5314 *p++ = cpu_to_be32(NFS4_CONTENT_DATA);
5315 p = xdr_encode_hyper(p, read->rd_offset);
5316 *p = cpu_to_be32(read->rd_length);
5322 nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
5323 union nfsd4_op_u *u)
5325 struct nfsd4_read *read = &u->read;
5326 struct file *file = read->rd_nf->nf_file;
5327 struct xdr_stream *xdr = resp->xdr;
5328 int starting_len = xdr->buf->len;
5335 /* eof flag, segment count */
5336 p = xdr_reserve_space(xdr, 4 + 4);
5339 xdr_commit_encode(xdr);
5341 read->rd_eof = read->rd_offset >= i_size_read(file_inode(file));
5345 nfserr = nfsd4_encode_read_plus_data(resp, read);
5347 xdr_truncate_encode(xdr, starting_len);
5354 p = xdr_encode_bool(p, read->rd_eof);
5355 *p = cpu_to_be32(segments);
5360 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
5361 union nfsd4_op_u *u)
5363 struct nfsd4_seek *seek = &u->seek;
5364 struct xdr_stream *xdr = resp->xdr;
5367 nfserr = nfsd4_encode_bool(xdr, seek->seek_eof);
5368 if (nfserr != nfs_ok)
5371 return nfsd4_encode_offset4(xdr, seek->seek_pos);
5375 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr,
5376 union nfsd4_op_u *p)
5382 * Encode kmalloc-ed buffer in to XDR stream.
5385 nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
5390 cplen = min_t(unsigned long, buflen,
5391 ((void *)xdr->end - (void *)xdr->p));
5392 p = xdr_reserve_space(xdr, cplen);
5394 return nfserr_resource;
5396 memcpy(p, buf, cplen);
5401 cplen = min_t(u32, buflen, PAGE_SIZE);
5402 p = xdr_reserve_space(xdr, cplen);
5404 return nfserr_resource;
5406 memcpy(p, buf, cplen);
5408 if (cplen < PAGE_SIZE) {
5410 * We're done, with a length that wasn't page
5411 * aligned, so possibly not word aligned. Pad
5412 * any trailing bytes with 0.
5414 xdr_encode_opaque_fixed(p, NULL, cplen);
5418 buflen -= PAGE_SIZE;
5426 nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5427 union nfsd4_op_u *u)
5429 struct nfsd4_getxattr *getxattr = &u->getxattr;
5430 struct xdr_stream *xdr = resp->xdr;
5433 p = xdr_reserve_space(xdr, 4);
5435 return nfserr_resource;
5437 *p = cpu_to_be32(getxattr->getxa_len);
5439 if (getxattr->getxa_len == 0)
5442 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
5443 getxattr->getxa_len);
5445 kvfree(getxattr->getxa_buf);
5451 nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5452 union nfsd4_op_u *u)
5454 struct nfsd4_setxattr *setxattr = &u->setxattr;
5455 struct xdr_stream *xdr = resp->xdr;
5457 return nfsd4_encode_change_info4(xdr, &setxattr->setxa_cinfo);
5461 * See if there are cookie values that can be rejected outright.
5464 nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5467 u64 cookie = listxattrs->lsxa_cookie;
5470 * If the cookie is larger than the maximum number we can fit
5471 * in the buffer we just got back from vfs_listxattr, it's invalid.
5473 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5474 return nfserr_badcookie;
5476 *offsetp = (u32)cookie;
5481 nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5482 union nfsd4_op_u *u)
5484 struct nfsd4_listxattrs *listxattrs = &u->listxattrs;
5485 struct xdr_stream *xdr = resp->xdr;
5486 u32 cookie_offset, count_offset, eof;
5487 u32 left, xdrleft, slen, count;
5498 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5503 * Reserve space for the cookie and the name array count. Record
5504 * the offsets to save them later.
5506 cookie_offset = xdr->buf->len;
5507 count_offset = cookie_offset + 8;
5508 p = xdr_reserve_space(xdr, XDR_UNIT * 3);
5510 status = nfserr_resource;
5515 left = listxattrs->lsxa_len;
5516 sp = listxattrs->lsxa_buf;
5519 /* Bytes left is maxcount - 8 (cookie) - 4 (array count) */
5520 xdrleft = listxattrs->lsxa_maxcount - XDR_UNIT * 3;
5522 while (left > 0 && xdrleft > 0) {
5526 * Check if this is a "user." attribute, skip it if not.
5528 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5531 slen -= XATTR_USER_PREFIX_LEN;
5532 xdrlen = 4 + ((slen + 3) & ~3);
5533 /* Check if both entry and eof can fit in the XDR buffer */
5534 if (xdrlen + XDR_UNIT > xdrleft) {
5537 * Can't even fit the first attribute name.
5539 status = nfserr_toosmall;
5546 left -= XATTR_USER_PREFIX_LEN;
5547 sp += XATTR_USER_PREFIX_LEN;
5548 if (nuser++ < offset)
5552 p = xdr_reserve_space(xdr, xdrlen);
5554 status = nfserr_resource;
5558 xdr_encode_opaque(p, sp, slen);
5568 * If there were user attributes to copy, but we didn't copy
5569 * any, the offset was too large (e.g. the cookie was invalid).
5571 if (nuser > 0 && count == 0) {
5572 status = nfserr_badcookie;
5577 p = xdr_reserve_space(xdr, 4);
5579 status = nfserr_resource;
5582 *p = cpu_to_be32(eof);
5584 cookie = offset + count;
5586 wire_cookie = cpu_to_be64(cookie);
5587 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &wire_cookie, 8);
5588 tmp = cpu_to_be32(count);
5589 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
5591 if (listxattrs->lsxa_len)
5592 kvfree(listxattrs->lsxa_buf);
5597 nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5598 union nfsd4_op_u *u)
5600 struct nfsd4_removexattr *removexattr = &u->removexattr;
5601 struct xdr_stream *xdr = resp->xdr;
5603 return nfsd4_encode_change_info4(xdr, &removexattr->rmxa_cinfo);
5606 typedef __be32(*nfsd4_enc)(struct nfsd4_compoundres *, __be32, union nfsd4_op_u *u);
5609 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5610 * since we don't need to filter out obsolete ops as this is
5611 * done in the decoding phase.
5613 static const nfsd4_enc nfsd4_enc_ops[] = {
5614 [OP_ACCESS] = nfsd4_encode_access,
5615 [OP_CLOSE] = nfsd4_encode_close,
5616 [OP_COMMIT] = nfsd4_encode_commit,
5617 [OP_CREATE] = nfsd4_encode_create,
5618 [OP_DELEGPURGE] = nfsd4_encode_noop,
5619 [OP_DELEGRETURN] = nfsd4_encode_noop,
5620 [OP_GETATTR] = nfsd4_encode_getattr,
5621 [OP_GETFH] = nfsd4_encode_getfh,
5622 [OP_LINK] = nfsd4_encode_link,
5623 [OP_LOCK] = nfsd4_encode_lock,
5624 [OP_LOCKT] = nfsd4_encode_lockt,
5625 [OP_LOCKU] = nfsd4_encode_locku,
5626 [OP_LOOKUP] = nfsd4_encode_noop,
5627 [OP_LOOKUPP] = nfsd4_encode_noop,
5628 [OP_NVERIFY] = nfsd4_encode_noop,
5629 [OP_OPEN] = nfsd4_encode_open,
5630 [OP_OPENATTR] = nfsd4_encode_noop,
5631 [OP_OPEN_CONFIRM] = nfsd4_encode_open_confirm,
5632 [OP_OPEN_DOWNGRADE] = nfsd4_encode_open_downgrade,
5633 [OP_PUTFH] = nfsd4_encode_noop,
5634 [OP_PUTPUBFH] = nfsd4_encode_noop,
5635 [OP_PUTROOTFH] = nfsd4_encode_noop,
5636 [OP_READ] = nfsd4_encode_read,
5637 [OP_READDIR] = nfsd4_encode_readdir,
5638 [OP_READLINK] = nfsd4_encode_readlink,
5639 [OP_REMOVE] = nfsd4_encode_remove,
5640 [OP_RENAME] = nfsd4_encode_rename,
5641 [OP_RENEW] = nfsd4_encode_noop,
5642 [OP_RESTOREFH] = nfsd4_encode_noop,
5643 [OP_SAVEFH] = nfsd4_encode_noop,
5644 [OP_SECINFO] = nfsd4_encode_secinfo,
5645 [OP_SETATTR] = nfsd4_encode_setattr,
5646 [OP_SETCLIENTID] = nfsd4_encode_setclientid,
5647 [OP_SETCLIENTID_CONFIRM] = nfsd4_encode_noop,
5648 [OP_VERIFY] = nfsd4_encode_noop,
5649 [OP_WRITE] = nfsd4_encode_write,
5650 [OP_RELEASE_LOCKOWNER] = nfsd4_encode_noop,
5652 /* NFSv4.1 operations */
5653 [OP_BACKCHANNEL_CTL] = nfsd4_encode_noop,
5654 [OP_BIND_CONN_TO_SESSION] = nfsd4_encode_bind_conn_to_session,
5655 [OP_EXCHANGE_ID] = nfsd4_encode_exchange_id,
5656 [OP_CREATE_SESSION] = nfsd4_encode_create_session,
5657 [OP_DESTROY_SESSION] = nfsd4_encode_noop,
5658 [OP_FREE_STATEID] = nfsd4_encode_noop,
5659 [OP_GET_DIR_DELEGATION] = nfsd4_encode_get_dir_delegation,
5660 #ifdef CONFIG_NFSD_PNFS
5661 [OP_GETDEVICEINFO] = nfsd4_encode_getdeviceinfo,
5662 [OP_GETDEVICELIST] = nfsd4_encode_noop,
5663 [OP_LAYOUTCOMMIT] = nfsd4_encode_layoutcommit,
5664 [OP_LAYOUTGET] = nfsd4_encode_layoutget,
5665 [OP_LAYOUTRETURN] = nfsd4_encode_layoutreturn,
5667 [OP_GETDEVICEINFO] = nfsd4_encode_noop,
5668 [OP_GETDEVICELIST] = nfsd4_encode_noop,
5669 [OP_LAYOUTCOMMIT] = nfsd4_encode_noop,
5670 [OP_LAYOUTGET] = nfsd4_encode_noop,
5671 [OP_LAYOUTRETURN] = nfsd4_encode_noop,
5673 [OP_SECINFO_NO_NAME] = nfsd4_encode_secinfo_no_name,
5674 [OP_SEQUENCE] = nfsd4_encode_sequence,
5675 [OP_SET_SSV] = nfsd4_encode_noop,
5676 [OP_TEST_STATEID] = nfsd4_encode_test_stateid,
5677 [OP_WANT_DELEGATION] = nfsd4_encode_noop,
5678 [OP_DESTROY_CLIENTID] = nfsd4_encode_noop,
5679 [OP_RECLAIM_COMPLETE] = nfsd4_encode_noop,
5681 /* NFSv4.2 operations */
5682 [OP_ALLOCATE] = nfsd4_encode_noop,
5683 [OP_COPY] = nfsd4_encode_copy,
5684 [OP_COPY_NOTIFY] = nfsd4_encode_copy_notify,
5685 [OP_DEALLOCATE] = nfsd4_encode_noop,
5686 [OP_IO_ADVISE] = nfsd4_encode_noop,
5687 [OP_LAYOUTERROR] = nfsd4_encode_noop,
5688 [OP_LAYOUTSTATS] = nfsd4_encode_noop,
5689 [OP_OFFLOAD_CANCEL] = nfsd4_encode_noop,
5690 [OP_OFFLOAD_STATUS] = nfsd4_encode_offload_status,
5691 [OP_READ_PLUS] = nfsd4_encode_read_plus,
5692 [OP_SEEK] = nfsd4_encode_seek,
5693 [OP_WRITE_SAME] = nfsd4_encode_noop,
5694 [OP_CLONE] = nfsd4_encode_noop,
5696 /* RFC 8276 extended atributes operations */
5697 [OP_GETXATTR] = nfsd4_encode_getxattr,
5698 [OP_SETXATTR] = nfsd4_encode_setxattr,
5699 [OP_LISTXATTRS] = nfsd4_encode_listxattrs,
5700 [OP_REMOVEXATTR] = nfsd4_encode_removexattr,
5704 * Calculate whether we still have space to encode repsize bytes.
5705 * There are two considerations:
5706 * - For NFS versions >=4.1, the size of the reply must stay within
5708 * - For all NFS versions, we must stay within limited preallocated
5711 * This is called before the operation is processed, so can only provide
5712 * an upper estimate. For some nonidempotent operations (such as
5713 * getattr), it's not necessarily a problem if that estimate is wrong,
5714 * as we can fail it after processing without significant side effects.
5716 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
5718 struct xdr_buf *buf = &resp->rqstp->rq_res;
5719 struct nfsd4_slot *slot = resp->cstate.slot;
5721 if (buf->len + respsize <= buf->buflen)
5723 if (!nfsd4_has_session(&resp->cstate))
5724 return nfserr_resource;
5725 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5727 return nfserr_rep_too_big_to_cache;
5729 return nfserr_rep_too_big;
5733 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5735 struct xdr_stream *xdr = resp->xdr;
5736 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5737 struct svc_rqst *rqstp = resp->rqstp;
5738 const struct nfsd4_operation *opdesc = op->opdesc;
5739 int post_err_offset;
5743 p = xdr_reserve_space(xdr, 8);
5746 *p++ = cpu_to_be32(op->opnum);
5747 post_err_offset = xdr->buf->len;
5749 if (op->opnum == OP_ILLEGAL)
5751 if (op->status && opdesc &&
5752 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5754 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
5755 !nfsd4_enc_ops[op->opnum]);
5756 encoder = nfsd4_enc_ops[op->opnum];
5757 op->status = encoder(resp, op->status, &op->u);
5759 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
5760 xdr_commit_encode(xdr);
5762 /* nfsd4_check_resp_size guarantees enough room for error status */
5764 int space_needed = 0;
5765 if (!nfsd4_last_compound_op(rqstp))
5766 space_needed = COMPOUND_ERR_SLACK_SPACE;
5767 op->status = nfsd4_check_resp_size(resp, space_needed);
5769 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5770 struct nfsd4_slot *slot = resp->cstate.slot;
5772 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5773 op->status = nfserr_rep_too_big_to_cache;
5775 op->status = nfserr_rep_too_big;
5777 if (op->status == nfserr_resource ||
5778 op->status == nfserr_rep_too_big ||
5779 op->status == nfserr_rep_too_big_to_cache) {
5781 * The operation may have already been encoded or
5782 * partially encoded. No op returns anything additional
5783 * in the case of one of these three errors, so we can
5784 * just truncate back to after the status. But it's a
5785 * bug if we had to do this on a non-idempotent op:
5787 warn_on_nonidempotent_op(op);
5788 xdr_truncate_encode(xdr, post_err_offset);
5791 int len = xdr->buf->len - post_err_offset;
5793 so->so_replay.rp_status = op->status;
5794 so->so_replay.rp_buflen = len;
5795 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5796 so->so_replay.rp_buf, len);
5801 if (opdesc && opdesc->op_release)
5802 opdesc->op_release(&op->u);
5805 * Account for pages consumed while encoding this operation.
5806 * The xdr_stream primitives don't manage rq_next_page.
5808 rqstp->rq_next_page = xdr->page_ptr + 1;
5812 * nfsd4_encode_replay - encode a result stored in the stateowner reply cache
5813 * @xdr: send buffer's XDR stream
5814 * @op: operation being replayed
5816 * @op->replay->rp_buf contains the previously-sent already-encoded result.
5818 void nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
5820 struct nfs4_replay *rp = op->replay;
5822 trace_nfsd_stateowner_replay(op->opnum, rp);
5824 if (xdr_stream_encode_u32(xdr, op->opnum) != XDR_UNIT)
5826 if (xdr_stream_encode_be32(xdr, rp->rp_status) != XDR_UNIT)
5828 xdr_stream_encode_opaque_fixed(xdr, rp->rp_buf, rp->rp_buflen);
5831 void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
5833 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5835 if (args->ops != args->iops) {
5837 args->ops = args->iops;
5839 while (args->to_free) {
5840 struct svcxdr_tmpbuf *tb = args->to_free;
5841 args->to_free = tb->next;
5847 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
5849 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5851 /* svcxdr_tmp_alloc */
5852 args->to_free = NULL;
5855 args->ops = args->iops;
5856 args->rqstp = rqstp;
5858 return nfsd4_decode_compound(args);
5862 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
5864 struct nfsd4_compoundres *resp = rqstp->rq_resp;
5868 * Send buffer space for the following items is reserved
5869 * at the top of nfsd4_proc_compound().
5873 *p++ = resp->cstate.status;
5874 *p++ = htonl(resp->taglen);
5875 memcpy(p, resp->tag, resp->taglen);
5876 p += XDR_QUADLEN(resp->taglen);
5877 *p++ = htonl(resp->opcnt);
5879 nfsd4_sequence_done(resp);