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);
1735 #ifdef CONFIG_NFSD_PNFS
1737 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1738 union nfsd4_op_u *u)
1740 struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo;
1743 memset(gdev, 0, sizeof(*gdev));
1744 status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid);
1747 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0)
1748 return nfserr_bad_xdr;
1749 if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0)
1750 return nfserr_bad_xdr;
1751 if (xdr_stream_decode_uint32_array(argp->xdr,
1752 &gdev->gd_notify_types, 1) < 0)
1753 return nfserr_bad_xdr;
1759 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1760 union nfsd4_op_u *u)
1762 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
1765 memset(lcp, 0, sizeof(*lcp));
1766 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0)
1767 return nfserr_bad_xdr;
1768 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0)
1769 return nfserr_bad_xdr;
1770 if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0)
1771 return nfserr_bad_xdr;
1772 status = nfsd4_decode_stateid4(argp, &lcp->lc_sid);
1775 if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0)
1776 return nfserr_bad_xdr;
1777 if (lcp->lc_newoffset) {
1778 if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0)
1779 return nfserr_bad_xdr;
1781 lcp->lc_last_wr = 0;
1782 p = xdr_inline_decode(argp->xdr, XDR_UNIT);
1784 return nfserr_bad_xdr;
1785 if (xdr_item_is_present(p)) {
1786 status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime);
1790 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1792 return nfsd4_decode_layoutupdate4(argp, lcp);
1796 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1797 union nfsd4_op_u *u)
1799 struct nfsd4_layoutget *lgp = &u->layoutget;
1802 memset(lgp, 0, sizeof(*lgp));
1803 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0)
1804 return nfserr_bad_xdr;
1805 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0)
1806 return nfserr_bad_xdr;
1807 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0)
1808 return nfserr_bad_xdr;
1809 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0)
1810 return nfserr_bad_xdr;
1811 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0)
1812 return nfserr_bad_xdr;
1813 if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0)
1814 return nfserr_bad_xdr;
1815 status = nfsd4_decode_stateid4(argp, &lgp->lg_sid);
1818 if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0)
1819 return nfserr_bad_xdr;
1825 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1826 union nfsd4_op_u *u)
1828 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
1829 memset(lrp, 0, sizeof(*lrp));
1830 if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0)
1831 return nfserr_bad_xdr;
1832 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0)
1833 return nfserr_bad_xdr;
1834 if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0)
1835 return nfserr_bad_xdr;
1836 return nfsd4_decode_layoutreturn4(argp, lrp);
1838 #endif /* CONFIG_NFSD_PNFS */
1840 static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1841 union nfsd4_op_u *u)
1843 struct nfsd4_secinfo_no_name *sin = &u->secinfo_no_name;
1844 if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0)
1845 return nfserr_bad_xdr;
1847 sin->sin_exp = NULL;
1852 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1853 union nfsd4_op_u *u)
1855 struct nfsd4_sequence *seq = &u->sequence;
1858 status = nfsd4_decode_sessionid4(argp, &seq->sessionid);
1861 p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4);
1863 return nfserr_bad_xdr;
1864 seq->seqid = be32_to_cpup(p++);
1865 seq->slotid = be32_to_cpup(p++);
1866 seq->maxslots = be32_to_cpup(p++);
1867 seq->cachethis = be32_to_cpup(p);
1869 seq->status_flags = 0;
1874 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp,
1875 union nfsd4_op_u *u)
1877 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
1878 struct nfsd4_test_stateid_id *stateid;
1882 memset(test_stateid, 0, sizeof(*test_stateid));
1883 if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0)
1884 return nfserr_bad_xdr;
1886 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1887 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1888 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1890 return nfserr_jukebox;
1891 INIT_LIST_HEAD(&stateid->ts_id_list);
1892 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1893 status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid);
1901 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp,
1902 union nfsd4_op_u *u)
1904 struct nfsd4_destroy_clientid *dc = &u->destroy_clientid;
1905 return nfsd4_decode_clientid4(argp, &dc->clientid);
1908 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp,
1909 union nfsd4_op_u *u)
1911 struct nfsd4_reclaim_complete *rc = &u->reclaim_complete;
1912 if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0)
1913 return nfserr_bad_xdr;
1918 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1919 union nfsd4_op_u *u)
1921 struct nfsd4_fallocate *fallocate = &u->allocate;
1924 status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid);
1927 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0)
1928 return nfserr_bad_xdr;
1929 if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0)
1930 return nfserr_bad_xdr;
1935 static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1936 struct nl4_server *ns)
1938 struct nfs42_netaddr *naddr;
1941 if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0)
1942 return nfserr_bad_xdr;
1944 /* currently support for 1 inter-server source server */
1945 switch (ns->nl4_type) {
1947 naddr = &ns->u.nl4_addr;
1949 if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0)
1950 return nfserr_bad_xdr;
1951 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1952 return nfserr_bad_xdr;
1954 p = xdr_inline_decode(argp->xdr, naddr->netid_len);
1956 return nfserr_bad_xdr;
1957 memcpy(naddr->netid, p, naddr->netid_len);
1959 if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0)
1960 return nfserr_bad_xdr;
1961 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1962 return nfserr_bad_xdr;
1964 p = xdr_inline_decode(argp->xdr, naddr->addr_len);
1966 return nfserr_bad_xdr;
1967 memcpy(naddr->addr, p, naddr->addr_len);
1970 return nfserr_bad_xdr;
1977 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
1979 struct nfsd4_copy *copy = &u->copy;
1980 u32 consecutive, i, count, sync;
1981 struct nl4_server *ns_dummy;
1984 memset(copy, 0, sizeof(*copy));
1985 status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid);
1988 status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid);
1991 if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0)
1992 return nfserr_bad_xdr;
1993 if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0)
1994 return nfserr_bad_xdr;
1995 if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0)
1996 return nfserr_bad_xdr;
1997 /* ca_consecutive: we always do consecutive copies */
1998 if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0)
1999 return nfserr_bad_xdr;
2000 if (xdr_stream_decode_bool(argp->xdr, &sync) < 0)
2001 return nfserr_bad_xdr;
2002 nfsd4_copy_set_sync(copy, sync);
2004 if (xdr_stream_decode_u32(argp->xdr, &count) < 0)
2005 return nfserr_bad_xdr;
2006 copy->cp_src = svcxdr_tmpalloc(argp, sizeof(*copy->cp_src));
2007 if (copy->cp_src == NULL)
2008 return nfserr_jukebox;
2009 if (count == 0) { /* intra-server copy */
2010 __set_bit(NFSD4_COPY_F_INTRA, ©->cp_flags);
2014 /* decode all the supplied server addresses but use only the first */
2015 status = nfsd4_decode_nl4_server(argp, copy->cp_src);
2019 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
2020 if (ns_dummy == NULL)
2021 return nfserr_jukebox;
2022 for (i = 0; i < count - 1; i++) {
2023 status = nfsd4_decode_nl4_server(argp, ns_dummy);
2035 nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
2036 union nfsd4_op_u *u)
2038 struct nfsd4_copy_notify *cn = &u->copy_notify;
2041 memset(cn, 0, sizeof(*cn));
2042 cn->cpn_src = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_src));
2043 if (cn->cpn_src == NULL)
2044 return nfserr_jukebox;
2045 cn->cpn_dst = svcxdr_tmpalloc(argp, sizeof(*cn->cpn_dst));
2046 if (cn->cpn_dst == NULL)
2047 return nfserr_jukebox;
2049 status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid);
2052 return nfsd4_decode_nl4_server(argp, cn->cpn_dst);
2056 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
2057 union nfsd4_op_u *u)
2059 struct nfsd4_offload_status *os = &u->offload_status;
2062 return nfsd4_decode_stateid4(argp, &os->stateid);
2066 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
2068 struct nfsd4_seek *seek = &u->seek;
2071 status = nfsd4_decode_stateid4(argp, &seek->seek_stateid);
2074 if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0)
2075 return nfserr_bad_xdr;
2076 if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0)
2077 return nfserr_bad_xdr;
2085 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u)
2087 struct nfsd4_clone *clone = &u->clone;
2090 status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid);
2093 status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid);
2096 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0)
2097 return nfserr_bad_xdr;
2098 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0)
2099 return nfserr_bad_xdr;
2100 if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0)
2101 return nfserr_bad_xdr;
2107 * XDR data that is more than PAGE_SIZE in size is normally part of a
2108 * read or write. However, the size of extended attributes is limited
2109 * by the maximum request size, and then further limited by the underlying
2110 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
2111 * is 64k). Since there is no kvec- or page-based interface to xattrs,
2112 * and we're not dealing with contiguous pages, we need to do some copying.
2116 * Decode data into buffer.
2119 nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr,
2120 char **bufp, u32 buflen)
2122 struct page **pages = xdr->pages;
2123 struct kvec *head = xdr->head;
2127 if (buflen <= head->iov_len) {
2129 * We're in luck, the head has enough space. Just return
2130 * the head, no need for copying.
2132 *bufp = head->iov_base;
2136 tmp = svcxdr_tmpalloc(argp, buflen);
2138 return nfserr_jukebox;
2141 memcpy(dp, head->iov_base, head->iov_len);
2142 buflen -= head->iov_len;
2143 dp += head->iov_len;
2145 while (buflen > 0) {
2146 len = min_t(u32, buflen, PAGE_SIZE);
2147 memcpy(dp, page_address(*pages), len);
2159 * Get a user extended attribute name from the XDR buffer.
2160 * It will not have the "user." prefix, so prepend it.
2161 * Lastly, check for nul characters in the name.
2164 nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
2166 char *name, *sp, *dp;
2170 if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0)
2171 return nfserr_bad_xdr;
2172 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
2173 return nfserr_nametoolong;
2175 return nfserr_bad_xdr;
2176 p = xdr_inline_decode(argp->xdr, namelen);
2178 return nfserr_bad_xdr;
2179 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
2181 return nfserr_jukebox;
2182 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
2185 * Copy the extended attribute name over while checking for 0
2189 dp = name + XATTR_USER_PREFIX_LEN;
2194 return nfserr_bad_xdr;
2205 * A GETXATTR op request comes without a length specifier. We just set the
2206 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
2207 * channel reply size. nfsd_getxattr will probe the length of the xattr,
2208 * check it against getxa_len, and allocate + return the value.
2211 nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
2212 union nfsd4_op_u *u)
2214 struct nfsd4_getxattr *getxattr = &u->getxattr;
2218 memset(getxattr, 0, sizeof(*getxattr));
2219 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
2223 maxcount = svc_max_payload(argp->rqstp);
2224 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2226 getxattr->getxa_len = maxcount;
2231 nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2232 union nfsd4_op_u *u)
2234 struct nfsd4_setxattr *setxattr = &u->setxattr;
2235 u32 flags, maxcount, size;
2238 memset(setxattr, 0, sizeof(*setxattr));
2240 if (xdr_stream_decode_u32(argp->xdr, &flags) < 0)
2241 return nfserr_bad_xdr;
2243 if (flags > SETXATTR4_REPLACE)
2244 return nfserr_inval;
2245 setxattr->setxa_flags = flags;
2247 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2251 maxcount = svc_max_payload(argp->rqstp);
2252 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2254 if (xdr_stream_decode_u32(argp->xdr, &size) < 0)
2255 return nfserr_bad_xdr;
2256 if (size > maxcount)
2257 return nfserr_xattr2big;
2259 setxattr->setxa_len = size;
2261 struct xdr_buf payload;
2263 if (!xdr_stream_subsegment(argp->xdr, &payload, size))
2264 return nfserr_bad_xdr;
2265 status = nfsd4_vbuf_from_vector(argp, &payload,
2266 &setxattr->setxa_buf, size);
2273 nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2274 union nfsd4_op_u *u)
2276 struct nfsd4_listxattrs *listxattrs = &u->listxattrs;
2279 memset(listxattrs, 0, sizeof(*listxattrs));
2281 if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0)
2282 return nfserr_bad_xdr;
2285 * If the cookie is too large to have even one user.x attribute
2286 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2288 if (listxattrs->lsxa_cookie >=
2289 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2290 return nfserr_badcookie;
2292 if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0)
2293 return nfserr_bad_xdr;
2295 /* Always need at least 2 words (length and one character) */
2296 return nfserr_inval;
2298 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2299 listxattrs->lsxa_maxcount = maxcount;
2305 nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2306 union nfsd4_op_u *u)
2308 struct nfsd4_removexattr *removexattr = &u->removexattr;
2309 memset(removexattr, 0, sizeof(*removexattr));
2310 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2314 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
2320 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, union nfsd4_op_u *p)
2322 return nfserr_notsupp;
2325 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, union nfsd4_op_u *u);
2327 static const nfsd4_dec nfsd4_dec_ops[] = {
2328 [OP_ACCESS] = nfsd4_decode_access,
2329 [OP_CLOSE] = nfsd4_decode_close,
2330 [OP_COMMIT] = nfsd4_decode_commit,
2331 [OP_CREATE] = nfsd4_decode_create,
2332 [OP_DELEGPURGE] = nfsd4_decode_notsupp,
2333 [OP_DELEGRETURN] = nfsd4_decode_delegreturn,
2334 [OP_GETATTR] = nfsd4_decode_getattr,
2335 [OP_GETFH] = nfsd4_decode_noop,
2336 [OP_LINK] = nfsd4_decode_link,
2337 [OP_LOCK] = nfsd4_decode_lock,
2338 [OP_LOCKT] = nfsd4_decode_lockt,
2339 [OP_LOCKU] = nfsd4_decode_locku,
2340 [OP_LOOKUP] = nfsd4_decode_lookup,
2341 [OP_LOOKUPP] = nfsd4_decode_noop,
2342 [OP_NVERIFY] = nfsd4_decode_verify,
2343 [OP_OPEN] = nfsd4_decode_open,
2344 [OP_OPENATTR] = nfsd4_decode_notsupp,
2345 [OP_OPEN_CONFIRM] = nfsd4_decode_open_confirm,
2346 [OP_OPEN_DOWNGRADE] = nfsd4_decode_open_downgrade,
2347 [OP_PUTFH] = nfsd4_decode_putfh,
2348 [OP_PUTPUBFH] = nfsd4_decode_putpubfh,
2349 [OP_PUTROOTFH] = nfsd4_decode_noop,
2350 [OP_READ] = nfsd4_decode_read,
2351 [OP_READDIR] = nfsd4_decode_readdir,
2352 [OP_READLINK] = nfsd4_decode_noop,
2353 [OP_REMOVE] = nfsd4_decode_remove,
2354 [OP_RENAME] = nfsd4_decode_rename,
2355 [OP_RENEW] = nfsd4_decode_renew,
2356 [OP_RESTOREFH] = nfsd4_decode_noop,
2357 [OP_SAVEFH] = nfsd4_decode_noop,
2358 [OP_SECINFO] = nfsd4_decode_secinfo,
2359 [OP_SETATTR] = nfsd4_decode_setattr,
2360 [OP_SETCLIENTID] = nfsd4_decode_setclientid,
2361 [OP_SETCLIENTID_CONFIRM] = nfsd4_decode_setclientid_confirm,
2362 [OP_VERIFY] = nfsd4_decode_verify,
2363 [OP_WRITE] = nfsd4_decode_write,
2364 [OP_RELEASE_LOCKOWNER] = nfsd4_decode_release_lockowner,
2366 /* new operations for NFSv4.1 */
2367 [OP_BACKCHANNEL_CTL] = nfsd4_decode_backchannel_ctl,
2368 [OP_BIND_CONN_TO_SESSION] = nfsd4_decode_bind_conn_to_session,
2369 [OP_EXCHANGE_ID] = nfsd4_decode_exchange_id,
2370 [OP_CREATE_SESSION] = nfsd4_decode_create_session,
2371 [OP_DESTROY_SESSION] = nfsd4_decode_destroy_session,
2372 [OP_FREE_STATEID] = nfsd4_decode_free_stateid,
2373 [OP_GET_DIR_DELEGATION] = nfsd4_decode_notsupp,
2374 #ifdef CONFIG_NFSD_PNFS
2375 [OP_GETDEVICEINFO] = nfsd4_decode_getdeviceinfo,
2376 [OP_GETDEVICELIST] = nfsd4_decode_notsupp,
2377 [OP_LAYOUTCOMMIT] = nfsd4_decode_layoutcommit,
2378 [OP_LAYOUTGET] = nfsd4_decode_layoutget,
2379 [OP_LAYOUTRETURN] = nfsd4_decode_layoutreturn,
2381 [OP_GETDEVICEINFO] = nfsd4_decode_notsupp,
2382 [OP_GETDEVICELIST] = nfsd4_decode_notsupp,
2383 [OP_LAYOUTCOMMIT] = nfsd4_decode_notsupp,
2384 [OP_LAYOUTGET] = nfsd4_decode_notsupp,
2385 [OP_LAYOUTRETURN] = nfsd4_decode_notsupp,
2387 [OP_SECINFO_NO_NAME] = nfsd4_decode_secinfo_no_name,
2388 [OP_SEQUENCE] = nfsd4_decode_sequence,
2389 [OP_SET_SSV] = nfsd4_decode_notsupp,
2390 [OP_TEST_STATEID] = nfsd4_decode_test_stateid,
2391 [OP_WANT_DELEGATION] = nfsd4_decode_notsupp,
2392 [OP_DESTROY_CLIENTID] = nfsd4_decode_destroy_clientid,
2393 [OP_RECLAIM_COMPLETE] = nfsd4_decode_reclaim_complete,
2395 /* new operations for NFSv4.2 */
2396 [OP_ALLOCATE] = nfsd4_decode_fallocate,
2397 [OP_COPY] = nfsd4_decode_copy,
2398 [OP_COPY_NOTIFY] = nfsd4_decode_copy_notify,
2399 [OP_DEALLOCATE] = nfsd4_decode_fallocate,
2400 [OP_IO_ADVISE] = nfsd4_decode_notsupp,
2401 [OP_LAYOUTERROR] = nfsd4_decode_notsupp,
2402 [OP_LAYOUTSTATS] = nfsd4_decode_notsupp,
2403 [OP_OFFLOAD_CANCEL] = nfsd4_decode_offload_status,
2404 [OP_OFFLOAD_STATUS] = nfsd4_decode_offload_status,
2405 [OP_READ_PLUS] = nfsd4_decode_read,
2406 [OP_SEEK] = nfsd4_decode_seek,
2407 [OP_WRITE_SAME] = nfsd4_decode_notsupp,
2408 [OP_CLONE] = nfsd4_decode_clone,
2409 /* RFC 8276 extended atributes operations */
2410 [OP_GETXATTR] = nfsd4_decode_getxattr,
2411 [OP_SETXATTR] = nfsd4_decode_setxattr,
2412 [OP_LISTXATTRS] = nfsd4_decode_listxattrs,
2413 [OP_REMOVEXATTR] = nfsd4_decode_removexattr,
2417 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2419 if (op->opnum < FIRST_NFS4_OP)
2421 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
2423 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2425 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
2431 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2433 struct nfsd4_op *op;
2434 bool cachethis = false;
2435 int auth_slack= argp->rqstp->rq_auth_slack;
2436 int max_reply = auth_slack + 8; /* opcnt, status */
2442 if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0)
2444 max_reply += XDR_UNIT;
2446 if (unlikely(argp->taglen)) {
2447 if (argp->taglen > NFSD4_MAX_TAGLEN)
2449 p = xdr_inline_decode(argp->xdr, argp->taglen);
2452 argp->tag = svcxdr_savemem(argp, p, argp->taglen);
2455 max_reply += xdr_align_size(argp->taglen);
2458 if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0)
2460 if (xdr_stream_decode_u32(argp->xdr, &argp->client_opcnt) < 0)
2462 argp->opcnt = min_t(u32, argp->client_opcnt,
2463 NFSD_MAX_OPS_PER_COMPOUND);
2465 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
2466 argp->ops = vcalloc(argp->opcnt, sizeof(*argp->ops));
2468 argp->ops = argp->iops;
2473 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
2476 for (i = 0; i < argp->opcnt; i++) {
2481 if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0)
2483 if (nfsd4_opnum_in_range(argp, op)) {
2484 op->opdesc = OPDESC(op);
2485 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
2486 if (op->status != nfs_ok)
2487 trace_nfsd_compound_decode_err(argp->rqstp,
2492 op->opnum = OP_ILLEGAL;
2493 op->status = nfserr_op_illegal;
2497 * We'll try to cache the result in the DRC if any one
2498 * op in the compound wants to be cached:
2500 cachethis |= nfsd4_cache_this_op(op);
2502 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
2504 readbytes += nfsd4_max_reply(argp->rqstp, op);
2506 max_reply += nfsd4_max_reply(argp->rqstp, op);
2508 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2509 * (Special case because it will just skip encoding this
2510 * if it runs out of xdr buffer space, and it is the only
2511 * operation that behaves this way.)
2513 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
2514 max_reply += NFS4_OPAQUE_LIMIT;
2521 /* Sessions make the DRC unnecessary: */
2522 if (argp->minorversion)
2524 svc_reserve(argp->rqstp, max_reply + readbytes);
2525 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
2527 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
2528 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
2533 static __be32 nfsd4_encode_nfs_fh4(struct xdr_stream *xdr,
2534 struct knfsd_fh *fh_handle)
2536 return nfsd4_encode_opaque(xdr, fh_handle->fh_raw, fh_handle->fh_size);
2539 /* This is a frequently-encoded type; open-coded for speed */
2540 static __be32 nfsd4_encode_nfstime4(struct xdr_stream *xdr,
2541 const struct timespec64 *tv)
2545 p = xdr_reserve_space(xdr, XDR_UNIT * 3);
2547 return nfserr_resource;
2548 p = xdr_encode_hyper(p, tv->tv_sec);
2549 *p = cpu_to_be32(tv->tv_nsec);
2553 static __be32 nfsd4_encode_specdata4(struct xdr_stream *xdr,
2554 unsigned int major, unsigned int minor)
2558 status = nfsd4_encode_uint32_t(xdr, major);
2559 if (status != nfs_ok)
2561 return nfsd4_encode_uint32_t(xdr, minor);
2565 nfsd4_encode_change_info4(struct xdr_stream *xdr, const struct nfsd4_change_info *c)
2569 status = nfsd4_encode_bool(xdr, c->atomic);
2570 if (status != nfs_ok)
2572 status = nfsd4_encode_changeid4(xdr, c->before_change);
2573 if (status != nfs_ok)
2575 return nfsd4_encode_changeid4(xdr, c->after_change);
2578 static __be32 nfsd4_encode_netaddr4(struct xdr_stream *xdr,
2579 const struct nfs42_netaddr *addr)
2584 status = nfsd4_encode_opaque(xdr, addr->netid, addr->netid_len);
2585 if (status != nfs_ok)
2588 return nfsd4_encode_opaque(xdr, addr->addr, addr->addr_len);
2591 /* Encode as an array of strings the string given with components
2592 * separated @sep, escaped with esc_enter and esc_exit.
2594 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2595 char *components, char esc_enter,
2601 int strlen, count=0;
2602 char *str, *end, *next;
2604 dprintk("nfsd4_encode_components(%s)\n", components);
2606 pathlen_offset = xdr->buf->len;
2607 p = xdr_reserve_space(xdr, 4);
2609 return nfserr_resource;
2610 p++; /* We will fill this in with @count later */
2612 end = str = components;
2614 bool found_esc = false;
2616 /* try to parse as esc_start, ..., esc_end, sep */
2617 if (*str == esc_enter) {
2618 for (; *end && (*end != esc_exit); end++)
2619 /* find esc_exit or end of string */;
2621 if (*end && (!*next || *next == sep)) {
2628 for (; *end && (*end != sep); end++)
2629 /* find sep or end of string */;
2633 p = xdr_reserve_space(xdr, strlen + 4);
2635 return nfserr_resource;
2636 p = xdr_encode_opaque(p, str, strlen);
2646 pathlen = htonl(count);
2647 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2651 /* Encode as an array of strings the string given with components
2654 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2657 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2660 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2661 struct nfsd4_fs_location *location)
2665 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2669 status = nfsd4_encode_components(xdr, '/', location->path);
2675 static __be32 nfsd4_encode_pathname4(struct xdr_stream *xdr,
2676 const struct path *root,
2677 const struct path *path)
2679 struct path cur = *path;
2681 struct dentry **components = NULL;
2682 unsigned int ncomponents = 0;
2683 __be32 err = nfserr_jukebox;
2685 dprintk("nfsd4_encode_components(");
2688 /* First walk the path up to the nfsd root, and store the
2689 * dentries/path components in an array.
2692 if (path_equal(&cur, root))
2694 if (cur.dentry == cur.mnt->mnt_root) {
2695 if (follow_up(&cur))
2699 if ((ncomponents & 15) == 0) {
2700 struct dentry **new;
2701 new = krealloc(components,
2702 sizeof(*new) * (ncomponents + 16),
2708 components[ncomponents++] = cur.dentry;
2709 cur.dentry = dget_parent(cur.dentry);
2711 err = nfserr_resource;
2712 p = xdr_reserve_space(xdr, 4);
2715 *p++ = cpu_to_be32(ncomponents);
2717 while (ncomponents) {
2718 struct dentry *dentry = components[ncomponents - 1];
2721 spin_lock(&dentry->d_lock);
2722 len = dentry->d_name.len;
2723 p = xdr_reserve_space(xdr, len + 4);
2725 spin_unlock(&dentry->d_lock);
2728 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2729 dprintk("/%pd", dentry);
2730 spin_unlock(&dentry->d_lock);
2739 dput(components[--ncomponents]);
2745 static __be32 nfsd4_encode_fs_locations4(struct xdr_stream *xdr,
2746 struct svc_rqst *rqstp,
2747 struct svc_export *exp)
2749 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2750 struct svc_export *exp_ps;
2755 exp_ps = rqst_find_fsidzero_export(rqstp);
2757 return nfserrno(PTR_ERR(exp_ps));
2758 status = nfsd4_encode_pathname4(xdr, &exp_ps->ex_path, &exp->ex_path);
2760 if (status != nfs_ok)
2764 if (xdr_stream_encode_u32(xdr, fslocs->locations_count) != XDR_UNIT)
2765 return nfserr_resource;
2766 for (i = 0; i < fslocs->locations_count; i++) {
2767 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2768 if (status != nfs_ok)
2775 static __be32 nfsd4_encode_nfsace4(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2776 struct nfs4_ace *ace)
2781 status = nfsd4_encode_acetype4(xdr, ace->type);
2782 if (status != nfs_ok)
2783 return nfserr_resource;
2785 status = nfsd4_encode_aceflag4(xdr, ace->flag);
2786 if (status != nfs_ok)
2787 return nfserr_resource;
2789 status = nfsd4_encode_acemask4(xdr, ace->access_mask & NFS4_ACE_MASK_ALL);
2790 if (status != nfs_ok)
2791 return nfserr_resource;
2793 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2794 return nfs4_acl_write_who(xdr, ace->whotype);
2795 if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2796 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2797 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2800 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2801 FATTR4_WORD0_RDATTR_ERROR)
2802 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2803 #define WORD2_ABSENT_FS_ATTRS 0
2805 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2806 static inline __be32
2807 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2808 void *context, int len)
2812 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2814 return nfserr_resource;
2817 * For now we use a 0 here to indicate the null translation; in
2818 * the future we may place a call to translation code here.
2820 *p++ = cpu_to_be32(0); /* lfs */
2821 *p++ = cpu_to_be32(0); /* pi */
2822 p = xdr_encode_opaque(p, context, len);
2826 static inline __be32
2827 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2828 void *context, int len)
2832 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2834 /* As per referral draft: */
2835 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2836 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2837 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2838 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2839 *rdattr_err = NFSERR_MOVED;
2841 return nfserr_moved;
2843 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2844 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2845 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2850 static int nfsd4_get_mounted_on_ino(struct svc_export *exp, u64 *pino)
2852 struct path path = exp->ex_path;
2857 while (follow_up(&path)) {
2858 if (path.dentry != path.mnt->mnt_root)
2861 err = vfs_getattr(&path, &stat, STATX_INO, AT_STATX_SYNC_AS_STAT);
2869 nfsd4_encode_bitmap4(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2874 p = xdr_reserve_space(xdr, XDR_UNIT * 4);
2877 *p++ = cpu_to_be32(3);
2878 *p++ = cpu_to_be32(bmval0);
2879 *p++ = cpu_to_be32(bmval1);
2880 *p++ = cpu_to_be32(bmval2);
2881 } else if (bmval1) {
2882 p = xdr_reserve_space(xdr, XDR_UNIT * 3);
2885 *p++ = cpu_to_be32(2);
2886 *p++ = cpu_to_be32(bmval0);
2887 *p++ = cpu_to_be32(bmval1);
2889 p = xdr_reserve_space(xdr, XDR_UNIT * 2);
2892 *p++ = cpu_to_be32(1);
2893 *p++ = cpu_to_be32(bmval0);
2898 return nfserr_resource;
2901 struct nfsd4_fattr_args {
2902 struct svc_rqst *rqstp;
2904 struct svc_export *exp;
2905 struct dentry *dentry;
2907 struct kstatfs statfs;
2908 struct nfs4_acl *acl;
2910 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2915 bool contextsupport;
2916 bool ignore_crossmnt;
2919 typedef __be32(*nfsd4_enc_attr)(struct xdr_stream *xdr,
2920 const struct nfsd4_fattr_args *args);
2922 static __be32 nfsd4_encode_fattr4__noop(struct xdr_stream *xdr,
2923 const struct nfsd4_fattr_args *args)
2928 static __be32 nfsd4_encode_fattr4__true(struct xdr_stream *xdr,
2929 const struct nfsd4_fattr_args *args)
2931 return nfsd4_encode_bool(xdr, true);
2934 static __be32 nfsd4_encode_fattr4__false(struct xdr_stream *xdr,
2935 const struct nfsd4_fattr_args *args)
2937 return nfsd4_encode_bool(xdr, false);
2940 static __be32 nfsd4_encode_fattr4_supported_attrs(struct xdr_stream *xdr,
2941 const struct nfsd4_fattr_args *args)
2943 struct nfsd4_compoundres *resp = args->rqstp->rq_resp;
2944 u32 minorversion = resp->cstate.minorversion;
2947 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2948 if (!IS_POSIXACL(d_inode(args->dentry)))
2949 supp[0] &= ~FATTR4_WORD0_ACL;
2950 if (!args->contextsupport)
2951 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2953 return nfsd4_encode_bitmap4(xdr, supp[0], supp[1], supp[2]);
2956 static __be32 nfsd4_encode_fattr4_type(struct xdr_stream *xdr,
2957 const struct nfsd4_fattr_args *args)
2961 p = xdr_reserve_space(xdr, XDR_UNIT);
2963 return nfserr_resource;
2965 switch (args->stat.mode & S_IFMT) {
2967 *p = cpu_to_be32(NF4FIFO);
2970 *p = cpu_to_be32(NF4CHR);
2973 *p = cpu_to_be32(NF4DIR);
2976 *p = cpu_to_be32(NF4BLK);
2979 *p = cpu_to_be32(NF4LNK);
2982 *p = cpu_to_be32(NF4REG);
2985 *p = cpu_to_be32(NF4SOCK);
2988 return nfserr_serverfault;
2994 static __be32 nfsd4_encode_fattr4_fh_expire_type(struct xdr_stream *xdr,
2995 const struct nfsd4_fattr_args *args)
2999 mask = NFS4_FH_PERSISTENT;
3000 if (!(args->exp->ex_flags & NFSEXP_NOSUBTREECHECK))
3001 mask |= NFS4_FH_VOL_RENAME;
3002 return nfsd4_encode_uint32_t(xdr, mask);
3005 static __be32 nfsd4_encode_fattr4_change(struct xdr_stream *xdr,
3006 const struct nfsd4_fattr_args *args)
3008 const struct svc_export *exp = args->exp;
3011 if (unlikely(exp->ex_flags & NFSEXP_V4ROOT)) {
3012 u32 flush_time = convert_to_wallclock(exp->cd->flush_time);
3014 if (xdr_stream_encode_u32(xdr, flush_time) != XDR_UNIT)
3015 return nfserr_resource;
3016 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
3017 return nfserr_resource;
3021 c = nfsd4_change_attribute(&args->stat, d_inode(args->dentry));
3022 return nfsd4_encode_changeid4(xdr, c);
3025 static __be32 nfsd4_encode_fattr4_size(struct xdr_stream *xdr,
3026 const struct nfsd4_fattr_args *args)
3028 return nfsd4_encode_uint64_t(xdr, args->size);
3031 static __be32 nfsd4_encode_fattr4_fsid(struct xdr_stream *xdr,
3032 const struct nfsd4_fattr_args *args)
3036 p = xdr_reserve_space(xdr, XDR_UNIT * 2 + XDR_UNIT * 2);
3038 return nfserr_resource;
3040 if (unlikely(args->exp->ex_fslocs.migrated)) {
3041 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
3042 xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
3045 switch (fsid_source(args->fhp)) {
3046 case FSIDSOURCE_FSID:
3047 p = xdr_encode_hyper(p, (u64)args->exp->ex_fsid);
3048 xdr_encode_hyper(p, (u64)0);
3050 case FSIDSOURCE_DEV:
3052 *p++ = cpu_to_be32(MAJOR(args->stat.dev));
3054 *p = cpu_to_be32(MINOR(args->stat.dev));
3056 case FSIDSOURCE_UUID:
3057 xdr_encode_opaque_fixed(p, args->exp->ex_uuid, EX_UUID_LEN);
3064 static __be32 nfsd4_encode_fattr4_lease_time(struct xdr_stream *xdr,
3065 const struct nfsd4_fattr_args *args)
3067 struct nfsd_net *nn = net_generic(SVC_NET(args->rqstp), nfsd_net_id);
3069 return nfsd4_encode_nfs_lease4(xdr, nn->nfsd4_lease);
3072 static __be32 nfsd4_encode_fattr4_rdattr_error(struct xdr_stream *xdr,
3073 const struct nfsd4_fattr_args *args)
3075 return nfsd4_encode_uint32_t(xdr, args->rdattr_err);
3078 static __be32 nfsd4_encode_fattr4_aclsupport(struct xdr_stream *xdr,
3079 const struct nfsd4_fattr_args *args)
3084 if (IS_POSIXACL(d_inode(args->dentry)))
3085 mask = ACL4_SUPPORT_ALLOW_ACL | ACL4_SUPPORT_DENY_ACL;
3086 return nfsd4_encode_uint32_t(xdr, mask);
3089 static __be32 nfsd4_encode_fattr4_acl(struct xdr_stream *xdr,
3090 const struct nfsd4_fattr_args *args)
3092 struct nfs4_acl *acl = args->acl;
3093 struct nfs4_ace *ace;
3098 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
3099 return nfserr_resource;
3101 if (xdr_stream_encode_u32(xdr, acl->naces) != XDR_UNIT)
3102 return nfserr_resource;
3103 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
3104 status = nfsd4_encode_nfsace4(xdr, args->rqstp, ace);
3105 if (status != nfs_ok)
3112 static __be32 nfsd4_encode_fattr4_filehandle(struct xdr_stream *xdr,
3113 const struct nfsd4_fattr_args *args)
3115 return nfsd4_encode_nfs_fh4(xdr, &args->fhp->fh_handle);
3118 static __be32 nfsd4_encode_fattr4_fileid(struct xdr_stream *xdr,
3119 const struct nfsd4_fattr_args *args)
3121 return nfsd4_encode_uint64_t(xdr, args->stat.ino);
3124 static __be32 nfsd4_encode_fattr4_files_avail(struct xdr_stream *xdr,
3125 const struct nfsd4_fattr_args *args)
3127 return nfsd4_encode_uint64_t(xdr, args->statfs.f_ffree);
3130 static __be32 nfsd4_encode_fattr4_files_free(struct xdr_stream *xdr,
3131 const struct nfsd4_fattr_args *args)
3133 return nfsd4_encode_uint64_t(xdr, args->statfs.f_ffree);
3136 static __be32 nfsd4_encode_fattr4_files_total(struct xdr_stream *xdr,
3137 const struct nfsd4_fattr_args *args)
3139 return nfsd4_encode_uint64_t(xdr, args->statfs.f_files);
3142 static __be32 nfsd4_encode_fattr4_fs_locations(struct xdr_stream *xdr,
3143 const struct nfsd4_fattr_args *args)
3145 return nfsd4_encode_fs_locations4(xdr, args->rqstp, args->exp);
3148 static __be32 nfsd4_encode_fattr4_maxfilesize(struct xdr_stream *xdr,
3149 const struct nfsd4_fattr_args *args)
3151 struct super_block *sb = args->exp->ex_path.mnt->mnt_sb;
3153 return nfsd4_encode_uint64_t(xdr, sb->s_maxbytes);
3156 static __be32 nfsd4_encode_fattr4_maxlink(struct xdr_stream *xdr,
3157 const struct nfsd4_fattr_args *args)
3159 return nfsd4_encode_uint32_t(xdr, 255);
3162 static __be32 nfsd4_encode_fattr4_maxname(struct xdr_stream *xdr,
3163 const struct nfsd4_fattr_args *args)
3165 return nfsd4_encode_uint32_t(xdr, args->statfs.f_namelen);
3168 static __be32 nfsd4_encode_fattr4_maxread(struct xdr_stream *xdr,
3169 const struct nfsd4_fattr_args *args)
3171 return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp));
3174 static __be32 nfsd4_encode_fattr4_maxwrite(struct xdr_stream *xdr,
3175 const struct nfsd4_fattr_args *args)
3177 return nfsd4_encode_uint64_t(xdr, svc_max_payload(args->rqstp));
3180 static __be32 nfsd4_encode_fattr4_mode(struct xdr_stream *xdr,
3181 const struct nfsd4_fattr_args *args)
3183 return nfsd4_encode_mode4(xdr, args->stat.mode & S_IALLUGO);
3186 static __be32 nfsd4_encode_fattr4_numlinks(struct xdr_stream *xdr,
3187 const struct nfsd4_fattr_args *args)
3189 return nfsd4_encode_uint32_t(xdr, args->stat.nlink);
3192 static __be32 nfsd4_encode_fattr4_owner(struct xdr_stream *xdr,
3193 const struct nfsd4_fattr_args *args)
3195 return nfsd4_encode_user(xdr, args->rqstp, args->stat.uid);
3198 static __be32 nfsd4_encode_fattr4_owner_group(struct xdr_stream *xdr,
3199 const struct nfsd4_fattr_args *args)
3201 return nfsd4_encode_group(xdr, args->rqstp, args->stat.gid);
3204 static __be32 nfsd4_encode_fattr4_rawdev(struct xdr_stream *xdr,
3205 const struct nfsd4_fattr_args *args)
3207 return nfsd4_encode_specdata4(xdr, MAJOR(args->stat.rdev),
3208 MINOR(args->stat.rdev));
3211 static __be32 nfsd4_encode_fattr4_space_avail(struct xdr_stream *xdr,
3212 const struct nfsd4_fattr_args *args)
3214 u64 avail = (u64)args->statfs.f_bavail * (u64)args->statfs.f_bsize;
3216 return nfsd4_encode_uint64_t(xdr, avail);
3219 static __be32 nfsd4_encode_fattr4_space_free(struct xdr_stream *xdr,
3220 const struct nfsd4_fattr_args *args)
3222 u64 free = (u64)args->statfs.f_bfree * (u64)args->statfs.f_bsize;
3224 return nfsd4_encode_uint64_t(xdr, free);
3227 static __be32 nfsd4_encode_fattr4_space_total(struct xdr_stream *xdr,
3228 const struct nfsd4_fattr_args *args)
3230 u64 total = (u64)args->statfs.f_blocks * (u64)args->statfs.f_bsize;
3232 return nfsd4_encode_uint64_t(xdr, total);
3235 static __be32 nfsd4_encode_fattr4_space_used(struct xdr_stream *xdr,
3236 const struct nfsd4_fattr_args *args)
3238 return nfsd4_encode_uint64_t(xdr, (u64)args->stat.blocks << 9);
3241 static __be32 nfsd4_encode_fattr4_time_access(struct xdr_stream *xdr,
3242 const struct nfsd4_fattr_args *args)
3244 return nfsd4_encode_nfstime4(xdr, &args->stat.atime);
3247 static __be32 nfsd4_encode_fattr4_time_create(struct xdr_stream *xdr,
3248 const struct nfsd4_fattr_args *args)
3250 return nfsd4_encode_nfstime4(xdr, &args->stat.btime);
3254 * ctime (in NFSv4, time_metadata) is not writeable, and the client
3255 * doesn't really care what resolution could theoretically be stored by
3258 * The client cares how close together changes can be while still
3259 * guaranteeing ctime changes. For most filesystems (which have
3260 * timestamps with nanosecond fields) that is limited by the resolution
3261 * of the time returned from current_time() (which I'm assuming to be
3264 static __be32 nfsd4_encode_fattr4_time_delta(struct xdr_stream *xdr,
3265 const struct nfsd4_fattr_args *args)
3267 const struct inode *inode = d_inode(args->dentry);
3268 u32 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
3269 struct timespec64 ts = ns_to_timespec64(ns);
3271 return nfsd4_encode_nfstime4(xdr, &ts);
3274 static __be32 nfsd4_encode_fattr4_time_metadata(struct xdr_stream *xdr,
3275 const struct nfsd4_fattr_args *args)
3277 return nfsd4_encode_nfstime4(xdr, &args->stat.ctime);
3280 static __be32 nfsd4_encode_fattr4_time_modify(struct xdr_stream *xdr,
3281 const struct nfsd4_fattr_args *args)
3283 return nfsd4_encode_nfstime4(xdr, &args->stat.mtime);
3286 static __be32 nfsd4_encode_fattr4_mounted_on_fileid(struct xdr_stream *xdr,
3287 const struct nfsd4_fattr_args *args)
3292 if (!args->ignore_crossmnt &&
3293 args->dentry == args->exp->ex_path.mnt->mnt_root) {
3294 err = nfsd4_get_mounted_on_ino(args->exp, &ino);
3296 return nfserrno(err);
3298 ino = args->stat.ino;
3300 return nfsd4_encode_uint64_t(xdr, ino);
3303 #ifdef CONFIG_NFSD_PNFS
3305 static __be32 nfsd4_encode_fattr4_fs_layout_types(struct xdr_stream *xdr,
3306 const struct nfsd4_fattr_args *args)
3308 unsigned long mask = args->exp->ex_layout_types;
3311 /* Hamming weight of @mask is the number of layout types to return */
3312 if (xdr_stream_encode_u32(xdr, hweight_long(mask)) != XDR_UNIT)
3313 return nfserr_resource;
3314 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
3315 if (mask & BIT(i)) {
3317 if (xdr_stream_encode_u32(xdr, i) != XDR_UNIT)
3318 return nfserr_resource;
3323 static __be32 nfsd4_encode_fattr4_layout_types(struct xdr_stream *xdr,
3324 const struct nfsd4_fattr_args *args)
3326 unsigned long mask = args->exp->ex_layout_types;
3329 /* Hamming weight of @mask is the number of layout types to return */
3330 if (xdr_stream_encode_u32(xdr, hweight_long(mask)) != XDR_UNIT)
3331 return nfserr_resource;
3332 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
3333 if (mask & BIT(i)) {
3335 if (xdr_stream_encode_u32(xdr, i) != XDR_UNIT)
3336 return nfserr_resource;
3341 static __be32 nfsd4_encode_fattr4_layout_blksize(struct xdr_stream *xdr,
3342 const struct nfsd4_fattr_args *args)
3344 return nfsd4_encode_uint32_t(xdr, args->stat.blksize);
3349 static __be32 nfsd4_encode_fattr4_suppattr_exclcreat(struct xdr_stream *xdr,
3350 const struct nfsd4_fattr_args *args)
3352 struct nfsd4_compoundres *resp = args->rqstp->rq_resp;
3355 memcpy(supp, nfsd_suppattrs[resp->cstate.minorversion], sizeof(supp));
3356 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3357 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3358 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3360 return nfsd4_encode_bitmap4(xdr, supp[0], supp[1], supp[2]);
3363 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3364 static __be32 nfsd4_encode_fattr4_sec_label(struct xdr_stream *xdr,
3365 const struct nfsd4_fattr_args *args)
3367 return nfsd4_encode_security_label(xdr, args->rqstp,
3368 args->context, args->contextlen);
3372 static __be32 nfsd4_encode_fattr4_xattr_support(struct xdr_stream *xdr,
3373 const struct nfsd4_fattr_args *args)
3375 int err = xattr_supports_user_prefix(d_inode(args->dentry));
3377 return nfsd4_encode_bool(xdr, err == 0);
3380 static const nfsd4_enc_attr nfsd4_enc_fattr4_encode_ops[] = {
3381 [FATTR4_SUPPORTED_ATTRS] = nfsd4_encode_fattr4_supported_attrs,
3382 [FATTR4_TYPE] = nfsd4_encode_fattr4_type,
3383 [FATTR4_FH_EXPIRE_TYPE] = nfsd4_encode_fattr4_fh_expire_type,
3384 [FATTR4_CHANGE] = nfsd4_encode_fattr4_change,
3385 [FATTR4_SIZE] = nfsd4_encode_fattr4_size,
3386 [FATTR4_LINK_SUPPORT] = nfsd4_encode_fattr4__true,
3387 [FATTR4_SYMLINK_SUPPORT] = nfsd4_encode_fattr4__true,
3388 [FATTR4_NAMED_ATTR] = nfsd4_encode_fattr4__false,
3389 [FATTR4_FSID] = nfsd4_encode_fattr4_fsid,
3390 [FATTR4_UNIQUE_HANDLES] = nfsd4_encode_fattr4__true,
3391 [FATTR4_LEASE_TIME] = nfsd4_encode_fattr4_lease_time,
3392 [FATTR4_RDATTR_ERROR] = nfsd4_encode_fattr4_rdattr_error,
3393 [FATTR4_ACL] = nfsd4_encode_fattr4_acl,
3394 [FATTR4_ACLSUPPORT] = nfsd4_encode_fattr4_aclsupport,
3395 [FATTR4_ARCHIVE] = nfsd4_encode_fattr4__noop,
3396 [FATTR4_CANSETTIME] = nfsd4_encode_fattr4__true,
3397 [FATTR4_CASE_INSENSITIVE] = nfsd4_encode_fattr4__false,
3398 [FATTR4_CASE_PRESERVING] = nfsd4_encode_fattr4__true,
3399 [FATTR4_CHOWN_RESTRICTED] = nfsd4_encode_fattr4__true,
3400 [FATTR4_FILEHANDLE] = nfsd4_encode_fattr4_filehandle,
3401 [FATTR4_FILEID] = nfsd4_encode_fattr4_fileid,
3402 [FATTR4_FILES_AVAIL] = nfsd4_encode_fattr4_files_avail,
3403 [FATTR4_FILES_FREE] = nfsd4_encode_fattr4_files_free,
3404 [FATTR4_FILES_TOTAL] = nfsd4_encode_fattr4_files_total,
3405 [FATTR4_FS_LOCATIONS] = nfsd4_encode_fattr4_fs_locations,
3406 [FATTR4_HIDDEN] = nfsd4_encode_fattr4__noop,
3407 [FATTR4_HOMOGENEOUS] = nfsd4_encode_fattr4__true,
3408 [FATTR4_MAXFILESIZE] = nfsd4_encode_fattr4_maxfilesize,
3409 [FATTR4_MAXLINK] = nfsd4_encode_fattr4_maxlink,
3410 [FATTR4_MAXNAME] = nfsd4_encode_fattr4_maxname,
3411 [FATTR4_MAXREAD] = nfsd4_encode_fattr4_maxread,
3412 [FATTR4_MAXWRITE] = nfsd4_encode_fattr4_maxwrite,
3413 [FATTR4_MIMETYPE] = nfsd4_encode_fattr4__noop,
3414 [FATTR4_MODE] = nfsd4_encode_fattr4_mode,
3415 [FATTR4_NO_TRUNC] = nfsd4_encode_fattr4__true,
3416 [FATTR4_NUMLINKS] = nfsd4_encode_fattr4_numlinks,
3417 [FATTR4_OWNER] = nfsd4_encode_fattr4_owner,
3418 [FATTR4_OWNER_GROUP] = nfsd4_encode_fattr4_owner_group,
3419 [FATTR4_QUOTA_AVAIL_HARD] = nfsd4_encode_fattr4__noop,
3420 [FATTR4_QUOTA_AVAIL_SOFT] = nfsd4_encode_fattr4__noop,
3421 [FATTR4_QUOTA_USED] = nfsd4_encode_fattr4__noop,
3422 [FATTR4_RAWDEV] = nfsd4_encode_fattr4_rawdev,
3423 [FATTR4_SPACE_AVAIL] = nfsd4_encode_fattr4_space_avail,
3424 [FATTR4_SPACE_FREE] = nfsd4_encode_fattr4_space_free,
3425 [FATTR4_SPACE_TOTAL] = nfsd4_encode_fattr4_space_total,
3426 [FATTR4_SPACE_USED] = nfsd4_encode_fattr4_space_used,
3427 [FATTR4_SYSTEM] = nfsd4_encode_fattr4__noop,
3428 [FATTR4_TIME_ACCESS] = nfsd4_encode_fattr4_time_access,
3429 [FATTR4_TIME_ACCESS_SET] = nfsd4_encode_fattr4__noop,
3430 [FATTR4_TIME_BACKUP] = nfsd4_encode_fattr4__noop,
3431 [FATTR4_TIME_CREATE] = nfsd4_encode_fattr4_time_create,
3432 [FATTR4_TIME_DELTA] = nfsd4_encode_fattr4_time_delta,
3433 [FATTR4_TIME_METADATA] = nfsd4_encode_fattr4_time_metadata,
3434 [FATTR4_TIME_MODIFY] = nfsd4_encode_fattr4_time_modify,
3435 [FATTR4_TIME_MODIFY_SET] = nfsd4_encode_fattr4__noop,
3436 [FATTR4_MOUNTED_ON_FILEID] = nfsd4_encode_fattr4_mounted_on_fileid,
3437 [FATTR4_DIR_NOTIF_DELAY] = nfsd4_encode_fattr4__noop,
3438 [FATTR4_DIRENT_NOTIF_DELAY] = nfsd4_encode_fattr4__noop,
3439 [FATTR4_DACL] = nfsd4_encode_fattr4__noop,
3440 [FATTR4_SACL] = nfsd4_encode_fattr4__noop,
3441 [FATTR4_CHANGE_POLICY] = nfsd4_encode_fattr4__noop,
3442 [FATTR4_FS_STATUS] = nfsd4_encode_fattr4__noop,
3444 #ifdef CONFIG_NFSD_PNFS
3445 [FATTR4_FS_LAYOUT_TYPES] = nfsd4_encode_fattr4_fs_layout_types,
3446 [FATTR4_LAYOUT_HINT] = nfsd4_encode_fattr4__noop,
3447 [FATTR4_LAYOUT_TYPES] = nfsd4_encode_fattr4_layout_types,
3448 [FATTR4_LAYOUT_BLKSIZE] = nfsd4_encode_fattr4_layout_blksize,
3449 [FATTR4_LAYOUT_ALIGNMENT] = nfsd4_encode_fattr4__noop,
3451 [FATTR4_FS_LAYOUT_TYPES] = nfsd4_encode_fattr4__noop,
3452 [FATTR4_LAYOUT_HINT] = nfsd4_encode_fattr4__noop,
3453 [FATTR4_LAYOUT_TYPES] = nfsd4_encode_fattr4__noop,
3454 [FATTR4_LAYOUT_BLKSIZE] = nfsd4_encode_fattr4__noop,
3455 [FATTR4_LAYOUT_ALIGNMENT] = nfsd4_encode_fattr4__noop,
3458 [FATTR4_FS_LOCATIONS_INFO] = nfsd4_encode_fattr4__noop,
3459 [FATTR4_MDSTHRESHOLD] = nfsd4_encode_fattr4__noop,
3460 [FATTR4_RETENTION_GET] = nfsd4_encode_fattr4__noop,
3461 [FATTR4_RETENTION_SET] = nfsd4_encode_fattr4__noop,
3462 [FATTR4_RETENTEVT_GET] = nfsd4_encode_fattr4__noop,
3463 [FATTR4_RETENTEVT_SET] = nfsd4_encode_fattr4__noop,
3464 [FATTR4_RETENTION_HOLD] = nfsd4_encode_fattr4__noop,
3465 [FATTR4_MODE_SET_MASKED] = nfsd4_encode_fattr4__noop,
3466 [FATTR4_SUPPATTR_EXCLCREAT] = nfsd4_encode_fattr4_suppattr_exclcreat,
3467 [FATTR4_FS_CHARSET_CAP] = nfsd4_encode_fattr4__noop,
3468 [FATTR4_CLONE_BLKSIZE] = nfsd4_encode_fattr4__noop,
3469 [FATTR4_SPACE_FREED] = nfsd4_encode_fattr4__noop,
3470 [FATTR4_CHANGE_ATTR_TYPE] = nfsd4_encode_fattr4__noop,
3472 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3473 [FATTR4_SEC_LABEL] = nfsd4_encode_fattr4_sec_label,
3475 [FATTR4_SEC_LABEL] = nfsd4_encode_fattr4__noop,
3478 [FATTR4_MODE_UMASK] = nfsd4_encode_fattr4__noop,
3479 [FATTR4_XATTR_SUPPORT] = nfsd4_encode_fattr4_xattr_support,
3483 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
3487 nfsd4_encode_fattr4(struct svc_rqst *rqstp, struct xdr_stream *xdr,
3488 struct svc_fh *fhp, struct svc_export *exp,
3489 struct dentry *dentry, const u32 *bmval,
3490 int ignore_crossmnt)
3492 struct nfsd4_fattr_args args;
3493 struct svc_fh *tempfh = NULL;
3494 int starting_len = xdr->buf->len;
3495 __be32 *attrlen_p, status;
3498 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3499 u32 minorversion = resp->cstate.minorversion;
3500 struct path path = {
3501 .mnt = exp->ex_path.mnt,
3506 unsigned long mask[2];
3512 WARN_ON_ONCE(bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1);
3513 WARN_ON_ONCE(!nfsd_attrs_supported(minorversion, bmval));
3517 args.dentry = dentry;
3518 args.ignore_crossmnt = (ignore_crossmnt != 0);
3521 * Make a local copy of the attribute bitmap that can be modified.
3523 memset(&u, 0, sizeof(u));
3524 u.attrmask[0] = bmval[0];
3525 u.attrmask[1] = bmval[1];
3526 u.attrmask[2] = bmval[2];
3528 args.rdattr_err = 0;
3529 if (exp->ex_fslocs.migrated) {
3530 status = fattr_handle_absent_fs(&u.attrmask[0], &u.attrmask[1],
3531 &u.attrmask[2], &args.rdattr_err);
3536 if (u.attrmask[0] & (FATTR4_WORD0_CHANGE | FATTR4_WORD0_SIZE)) {
3537 status = nfsd4_deleg_getattr_conflict(rqstp, d_inode(dentry),
3538 &file_modified, &size);
3543 err = vfs_getattr(&path, &args.stat,
3544 STATX_BASIC_STATS | STATX_BTIME | STATX_CHANGE_COOKIE,
3545 AT_STATX_SYNC_AS_STAT);
3548 args.size = file_modified ? size : args.stat.size;
3550 if (!(args.stat.result_mask & STATX_BTIME))
3551 /* underlying FS does not offer btime so we can't share it */
3552 u.attrmask[1] &= ~FATTR4_WORD1_TIME_CREATE;
3553 if ((u.attrmask[0] & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
3554 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
3555 (u.attrmask[1] & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
3556 FATTR4_WORD1_SPACE_TOTAL))) {
3557 err = vfs_statfs(&path, &args.statfs);
3561 if ((u.attrmask[0] & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) &&
3563 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
3564 status = nfserr_jukebox;
3567 fh_init(tempfh, NFS4_FHSIZE);
3568 status = fh_compose(tempfh, exp, dentry, NULL);
3576 if (u.attrmask[0] & FATTR4_WORD0_ACL) {
3577 err = nfsd4_get_nfs4_acl(rqstp, dentry, &args.acl);
3578 if (err == -EOPNOTSUPP)
3579 u.attrmask[0] &= ~FATTR4_WORD0_ACL;
3580 else if (err == -EINVAL) {
3581 status = nfserr_attrnotsupp;
3583 } else if (err != 0)
3587 args.contextsupport = false;
3589 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3590 args.context = NULL;
3591 if ((u.attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) ||
3592 u.attrmask[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
3593 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
3594 err = security_inode_getsecctx(d_inode(dentry),
3595 &args.context, &args.contextlen);
3598 args.contextsupport = (err == 0);
3599 if (u.attrmask[2] & FATTR4_WORD2_SECURITY_LABEL) {
3600 if (err == -EOPNOTSUPP)
3601 u.attrmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3606 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
3609 status = nfsd4_encode_bitmap4(xdr, u.attrmask[0],
3610 u.attrmask[1], u.attrmask[2]);
3615 attrlen_offset = xdr->buf->len;
3616 attrlen_p = xdr_reserve_space(xdr, XDR_UNIT);
3619 for_each_set_bit(bit, (const unsigned long *)&u.mask,
3620 ARRAY_SIZE(nfsd4_enc_fattr4_encode_ops)) {
3621 status = nfsd4_enc_fattr4_encode_ops[bit](xdr, &args);
3622 if (status != nfs_ok)
3625 *attrlen_p = cpu_to_be32(xdr->buf->len - attrlen_offset - XDR_UNIT);
3629 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3631 security_release_secctx(args.context, args.contextlen);
3632 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
3639 xdr_truncate_encode(xdr, starting_len);
3642 status = nfserrno(err);
3645 status = nfserr_resource;
3649 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3650 struct xdr_buf *buf, __be32 *p, int bytes)
3652 xdr->scratch.iov_len = 0;
3653 memset(buf, 0, sizeof(struct xdr_buf));
3654 buf->head[0].iov_base = p;
3655 buf->head[0].iov_len = 0;
3658 xdr->iov = buf->head;
3660 xdr->end = (void *)p + bytes;
3661 buf->buflen = bytes;
3664 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3665 struct svc_fh *fhp, struct svc_export *exp,
3666 struct dentry *dentry, u32 *bmval,
3667 struct svc_rqst *rqstp, int ignore_crossmnt)
3669 struct xdr_buf dummy;
3670 struct xdr_stream xdr;
3673 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
3674 ret = nfsd4_encode_fattr4(rqstp, &xdr, fhp, exp, dentry, bmval,
3681 * The buffer space for this field was reserved during a previous
3682 * call to nfsd4_encode_entry4().
3684 static void nfsd4_encode_entry4_nfs_cookie4(const struct nfsd4_readdir *readdir,
3687 __be64 cookie = cpu_to_be64(offset);
3688 struct xdr_stream *xdr = readdir->xdr;
3690 if (!readdir->cookie_offset)
3692 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, &cookie,
3696 static inline int attributes_need_mount(u32 *bmval)
3698 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3700 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3706 nfsd4_encode_entry4_fattr(struct nfsd4_readdir *cd, const char *name,
3709 struct svc_export *exp = cd->rd_fhp->fh_export;
3710 struct dentry *dentry;
3712 int ignore_crossmnt = 0;
3714 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
3716 return nfserrno(PTR_ERR(dentry));
3720 * In the case of a mountpoint, the client may be asking for
3721 * attributes that are only properties of the underlying filesystem
3722 * as opposed to the cross-mounted file system. In such a case,
3723 * we will not follow the cross mount and will fill the attribtutes
3724 * directly from the mountpoint dentry.
3726 if (nfsd_mountpoint(dentry, exp)) {
3729 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3730 && !attributes_need_mount(cd->rd_bmval)) {
3731 ignore_crossmnt = 1;
3735 * Why the heck aren't we just using nfsd_lookup??
3736 * Different "."/".." handling? Something else?
3737 * At least, add a comment here to explain....
3739 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3741 nfserr = nfserrno(err);
3744 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3750 nfserr = nfsd4_encode_fattr4(cd->rd_rqstp, cd->xdr, NULL, exp, dentry,
3751 cd->rd_bmval, ignore_crossmnt);
3759 nfsd4_encode_entry4_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3764 status = nfsd4_encode_bitmap4(xdr, FATTR4_WORD0_RDATTR_ERROR, 0, 0);
3765 if (status != nfs_ok)
3768 if (xdr_stream_encode_u32(xdr, XDR_UNIT) != XDR_UNIT)
3769 return nfserr_resource;
3771 if (xdr_stream_encode_be32(xdr, nfserr) != XDR_UNIT)
3772 return nfserr_resource;
3777 nfsd4_encode_entry4(void *ccdv, const char *name, int namlen,
3778 loff_t offset, u64 ino, unsigned int d_type)
3780 struct readdir_cd *ccd = ccdv;
3781 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3782 struct xdr_stream *xdr = cd->xdr;
3783 int start_offset = xdr->buf->len;
3785 u32 name_and_cookie;
3787 __be32 nfserr = nfserr_toosmall;
3789 /* In nfsv4, "." and ".." never make it onto the wire.. */
3790 if (name && isdotent(name, namlen)) {
3791 cd->common.err = nfs_ok;
3795 /* Encode the previous entry's cookie value */
3796 nfsd4_encode_entry4_nfs_cookie4(cd, offset);
3798 if (xdr_stream_encode_item_present(xdr) != XDR_UNIT)
3801 /* Reserve send buffer space for this entry's cookie value. */
3802 cookie_offset = xdr->buf->len;
3803 if (nfsd4_encode_nfs_cookie4(xdr, OFFSET_MAX) != nfs_ok)
3805 if (nfsd4_encode_component4(xdr, name, namlen) != nfs_ok)
3807 nfserr = nfsd4_encode_entry4_fattr(cd, name, namlen);
3811 case nfserr_resource:
3812 nfserr = nfserr_toosmall;
3815 xdr_truncate_encode(xdr, start_offset);
3817 case nfserr_jukebox:
3819 * The pseudoroot should only display dentries that lead to
3820 * exports. If we get EJUKEBOX here, then we can't tell whether
3821 * this entry should be included. Just fail the whole READDIR
3822 * with NFS4ERR_DELAY in that case, and hope that the situation
3823 * will resolve itself by the client's next attempt.
3825 if (cd->rd_fhp->fh_export->ex_flags & NFSEXP_V4ROOT)
3830 * If the client requested the RDATTR_ERROR attribute,
3831 * we stuff the error code into this attribute
3832 * and continue. If this attribute was not requested,
3833 * then in accordance with the spec, we fail the
3834 * entire READDIR operation(!)
3836 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3838 if (nfsd4_encode_entry4_rdattr_error(xdr, nfserr)) {
3839 nfserr = nfserr_toosmall;
3843 nfserr = nfserr_toosmall;
3844 entry_bytes = xdr->buf->len - start_offset;
3845 if (entry_bytes > cd->rd_maxcount)
3847 cd->rd_maxcount -= entry_bytes;
3849 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3850 * notes that it could be zero. If it is zero, then the server
3851 * should enforce only the rd_maxcount value.
3853 if (cd->rd_dircount) {
3854 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3855 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3857 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3858 if (!cd->rd_dircount)
3859 cd->rd_maxcount = 0;
3862 cd->cookie_offset = cookie_offset;
3864 cd->common.err = nfs_ok;
3867 xdr_truncate_encode(xdr, start_offset);
3868 cd->common.err = nfserr;
3873 nfsd4_encode_verifier4(struct xdr_stream *xdr, const nfs4_verifier *verf)
3877 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3879 return nfserr_resource;
3880 memcpy(p, verf->data, sizeof(verf->data));
3885 nfsd4_encode_clientid4(struct xdr_stream *xdr, const clientid_t *clientid)
3889 p = xdr_reserve_space(xdr, sizeof(__be64));
3891 return nfserr_resource;
3892 memcpy(p, clientid, sizeof(*clientid));
3896 /* This is a frequently-encoded item; open-coded for speed */
3898 nfsd4_encode_stateid4(struct xdr_stream *xdr, const stateid_t *sid)
3902 p = xdr_reserve_space(xdr, NFS4_STATEID_SIZE);
3904 return nfserr_resource;
3905 *p++ = cpu_to_be32(sid->si_generation);
3906 memcpy(p, &sid->si_opaque, sizeof(sid->si_opaque));
3911 nfsd4_encode_sessionid4(struct xdr_stream *xdr,
3912 const struct nfs4_sessionid *sessionid)
3914 return nfsd4_encode_opaque_fixed(xdr, sessionid->data,
3915 NFS4_MAX_SESSIONID_LEN);
3919 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr,
3920 union nfsd4_op_u *u)
3922 struct nfsd4_access *access = &u->access;
3923 struct xdr_stream *xdr = resp->xdr;
3927 status = nfsd4_encode_uint32_t(xdr, access->ac_supported);
3928 if (status != nfs_ok)
3931 return nfsd4_encode_uint32_t(xdr, access->ac_resp_access);
3934 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3935 union nfsd4_op_u *u)
3937 struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session;
3938 struct xdr_stream *xdr = resp->xdr;
3941 nfserr = nfsd4_encode_sessionid4(xdr, &bcts->sessionid);
3942 if (nfserr != nfs_ok)
3945 if (xdr_stream_encode_u32(xdr, bcts->dir) != XDR_UNIT)
3946 return nfserr_resource;
3947 /* bctsr_use_conn_in_rdma_mode */
3948 return nfsd4_encode_bool(xdr, false);
3952 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr,
3953 union nfsd4_op_u *u)
3955 struct nfsd4_close *close = &u->close;
3956 struct xdr_stream *xdr = resp->xdr;
3959 return nfsd4_encode_stateid4(xdr, &close->cl_stateid);
3964 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr,
3965 union nfsd4_op_u *u)
3967 struct nfsd4_commit *commit = &u->commit;
3969 return nfsd4_encode_verifier4(resp->xdr, &commit->co_verf);
3973 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr,
3974 union nfsd4_op_u *u)
3976 struct nfsd4_create *create = &u->create;
3977 struct xdr_stream *xdr = resp->xdr;
3980 nfserr = nfsd4_encode_change_info4(xdr, &create->cr_cinfo);
3984 return nfsd4_encode_bitmap4(xdr, create->cr_bmval[0],
3985 create->cr_bmval[1], create->cr_bmval[2]);
3989 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr,
3990 union nfsd4_op_u *u)
3992 struct nfsd4_getattr *getattr = &u->getattr;
3993 struct svc_fh *fhp = getattr->ga_fhp;
3994 struct xdr_stream *xdr = resp->xdr;
3996 /* obj_attributes */
3997 return nfsd4_encode_fattr4(resp->rqstp, xdr, fhp, fhp->fh_export,
3998 fhp->fh_dentry, getattr->ga_bmval, 0);
4002 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr,
4003 union nfsd4_op_u *u)
4005 struct xdr_stream *xdr = resp->xdr;
4006 struct svc_fh *fhp = u->getfh;
4009 return nfsd4_encode_nfs_fh4(xdr, &fhp->fh_handle);
4013 nfsd4_encode_lock_owner4(struct xdr_stream *xdr, const clientid_t *clientid,
4014 const struct xdr_netobj *owner)
4019 status = nfsd4_encode_clientid4(xdr, clientid);
4020 if (status != nfs_ok)
4023 return nfsd4_encode_opaque(xdr, owner->data, owner->len);
4027 nfsd4_encode_lock4denied(struct xdr_stream *xdr,
4028 const struct nfsd4_lock_denied *ld)
4033 status = nfsd4_encode_offset4(xdr, ld->ld_start);
4034 if (status != nfs_ok)
4037 status = nfsd4_encode_length4(xdr, ld->ld_length);
4038 if (status != nfs_ok)
4041 if (xdr_stream_encode_u32(xdr, ld->ld_type) != XDR_UNIT)
4042 return nfserr_resource;
4044 return nfsd4_encode_lock_owner4(xdr, &ld->ld_clientid,
4049 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr,
4050 union nfsd4_op_u *u)
4052 struct nfsd4_lock *lock = &u->lock;
4053 struct xdr_stream *xdr = resp->xdr;
4059 status = nfsd4_encode_stateid4(xdr, &lock->lk_resp_stateid);
4063 status = nfsd4_encode_lock4denied(xdr, &lock->lk_denied);
4068 return status != nfs_ok ? status : nfserr;
4072 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr,
4073 union nfsd4_op_u *u)
4075 struct nfsd4_lockt *lockt = &u->lockt;
4076 struct xdr_stream *xdr = resp->xdr;
4079 if (nfserr == nfserr_denied) {
4081 status = nfsd4_encode_lock4denied(xdr, &lockt->lt_denied);
4082 if (status != nfs_ok)
4089 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr,
4090 union nfsd4_op_u *u)
4092 struct nfsd4_locku *locku = &u->locku;
4093 struct xdr_stream *xdr = resp->xdr;
4096 return nfsd4_encode_stateid4(xdr, &locku->lu_stateid);
4101 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr,
4102 union nfsd4_op_u *u)
4104 struct nfsd4_link *link = &u->link;
4105 struct xdr_stream *xdr = resp->xdr;
4107 return nfsd4_encode_change_info4(xdr, &link->li_cinfo);
4111 * This implementation does not yet support returning an ACE in an
4112 * OPEN that offers a delegation.
4115 nfsd4_encode_open_nfsace4(struct xdr_stream *xdr)
4120 status = nfsd4_encode_acetype4(xdr, NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
4121 if (status != nfs_ok)
4122 return nfserr_resource;
4124 status = nfsd4_encode_aceflag4(xdr, 0);
4125 if (status != nfs_ok)
4126 return nfserr_resource;
4128 status = nfsd4_encode_acemask4(xdr, 0);
4129 if (status != nfs_ok)
4130 return nfserr_resource;
4131 /* who - empty for now */
4132 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
4133 return nfserr_resource;
4138 nfsd4_encode_open_read_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open)
4143 status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
4144 if (status != nfs_ok)
4147 status = nfsd4_encode_bool(xdr, open->op_recall);
4148 if (status != nfs_ok)
4151 return nfsd4_encode_open_nfsace4(xdr);
4155 nfsd4_encode_nfs_space_limit4(struct xdr_stream *xdr, u64 filesize)
4158 if (xdr_stream_encode_u32(xdr, NFS4_LIMIT_SIZE) != XDR_UNIT)
4159 return nfserr_resource;
4161 return nfsd4_encode_uint64_t(xdr, filesize);
4165 nfsd4_encode_open_write_delegation4(struct xdr_stream *xdr,
4166 struct nfsd4_open *open)
4171 status = nfsd4_encode_stateid4(xdr, &open->op_delegate_stateid);
4172 if (status != nfs_ok)
4175 status = nfsd4_encode_bool(xdr, open->op_recall);
4176 if (status != nfs_ok)
4179 status = nfsd4_encode_nfs_space_limit4(xdr, 0);
4180 if (status != nfs_ok)
4182 return nfsd4_encode_open_nfsace4(xdr);
4186 nfsd4_encode_open_none_delegation4(struct xdr_stream *xdr,
4187 struct nfsd4_open *open)
4189 __be32 status = nfs_ok;
4192 if (xdr_stream_encode_u32(xdr, open->op_why_no_deleg) != XDR_UNIT)
4193 return nfserr_resource;
4194 switch (open->op_why_no_deleg) {
4195 case WND4_CONTENTION:
4196 /* ond_server_will_push_deleg */
4197 status = nfsd4_encode_bool(xdr, false);
4200 /* ond_server_will_signal_avail */
4201 status = nfsd4_encode_bool(xdr, false);
4207 nfsd4_encode_open_delegation4(struct xdr_stream *xdr, struct nfsd4_open *open)
4211 /* delegation_type */
4212 if (xdr_stream_encode_u32(xdr, open->op_delegate_type) != XDR_UNIT)
4213 return nfserr_resource;
4214 switch (open->op_delegate_type) {
4215 case NFS4_OPEN_DELEGATE_NONE:
4218 case NFS4_OPEN_DELEGATE_READ:
4220 status = nfsd4_encode_open_read_delegation4(xdr, open);
4222 case NFS4_OPEN_DELEGATE_WRITE:
4224 status = nfsd4_encode_open_write_delegation4(xdr, open);
4226 case NFS4_OPEN_DELEGATE_NONE_EXT:
4228 status = nfsd4_encode_open_none_delegation4(xdr, open);
4231 status = nfserr_serverfault;
4238 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr,
4239 union nfsd4_op_u *u)
4241 struct nfsd4_open *open = &u->open;
4242 struct xdr_stream *xdr = resp->xdr;
4245 nfserr = nfsd4_encode_stateid4(xdr, &open->op_stateid);
4246 if (nfserr != nfs_ok)
4249 nfserr = nfsd4_encode_change_info4(xdr, &open->op_cinfo);
4250 if (nfserr != nfs_ok)
4253 nfserr = nfsd4_encode_uint32_t(xdr, open->op_rflags);
4254 if (nfserr != nfs_ok)
4257 nfserr = nfsd4_encode_bitmap4(xdr, open->op_bmval[0],
4258 open->op_bmval[1], open->op_bmval[2]);
4259 if (nfserr != nfs_ok)
4262 return nfsd4_encode_open_delegation4(xdr, open);
4266 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr,
4267 union nfsd4_op_u *u)
4269 struct nfsd4_open_confirm *oc = &u->open_confirm;
4270 struct xdr_stream *xdr = resp->xdr;
4273 return nfsd4_encode_stateid4(xdr, &oc->oc_resp_stateid);
4277 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr,
4278 union nfsd4_op_u *u)
4280 struct nfsd4_open_downgrade *od = &u->open_downgrade;
4281 struct xdr_stream *xdr = resp->xdr;
4284 return nfsd4_encode_stateid4(xdr, &od->od_stateid);
4288 * The operation of this function assumes that this is the only
4289 * READ operation in the COMPOUND. If there are multiple READs,
4290 * we use nfsd4_encode_readv().
4292 static __be32 nfsd4_encode_splice_read(
4293 struct nfsd4_compoundres *resp,
4294 struct nfsd4_read *read,
4295 struct file *file, unsigned long maxcount)
4297 struct xdr_stream *xdr = resp->xdr;
4298 struct xdr_buf *buf = xdr->buf;
4299 int status, space_left;
4303 * Make sure there is room at the end of buf->head for
4304 * svcxdr_encode_opaque_pages() to create a tail buffer
4305 * to XDR-pad the payload.
4307 if (xdr->iov != xdr->buf->head || xdr->end - xdr->p < 1)
4308 return nfserr_resource;
4310 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
4311 file, read->rd_offset, &maxcount,
4313 read->rd_length = maxcount;
4316 svcxdr_encode_opaque_pages(read->rd_rqstp, xdr, buf->pages,
4317 buf->page_base, maxcount);
4318 status = svc_encode_result_payload(read->rd_rqstp,
4319 buf->head[0].iov_len, maxcount);
4321 nfserr = nfserrno(status);
4326 * Prepare to encode subsequent operations.
4328 * xdr_truncate_encode() is not safe to use after a successful
4329 * splice read has been done, so the following stream
4330 * manipulations are open-coded.
4332 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
4333 buf->buflen - buf->len);
4334 buf->buflen = buf->len + space_left;
4335 xdr->end = (__be32 *)((void *)xdr->end + space_left);
4341 * nfsd_splice_actor may have already messed with the
4342 * page length; reset it so as not to confuse
4343 * xdr_truncate_encode in our caller.
4349 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
4350 struct nfsd4_read *read,
4351 struct file *file, unsigned long maxcount)
4353 struct xdr_stream *xdr = resp->xdr;
4354 unsigned int base = xdr->buf->page_len & ~PAGE_MASK;
4355 unsigned int starting_len = xdr->buf->len;
4356 __be32 zero = xdr_zero;
4359 if (xdr_reserve_space_vec(xdr, maxcount) < 0)
4360 return nfserr_resource;
4362 nfserr = nfsd_iter_read(resp->rqstp, read->rd_fhp, file,
4363 read->rd_offset, &maxcount, base,
4365 read->rd_length = maxcount;
4368 if (svc_encode_result_payload(resp->rqstp, starting_len, maxcount))
4370 xdr_truncate_encode(xdr, starting_len + xdr_align_size(maxcount));
4372 write_bytes_to_xdr_buf(xdr->buf, starting_len + maxcount, &zero,
4373 xdr_pad_size(maxcount));
4378 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
4379 union nfsd4_op_u *u)
4381 struct nfsd4_read *read = &u->read;
4382 bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
4383 unsigned long maxcount;
4384 struct xdr_stream *xdr = resp->xdr;
4386 int starting_len = xdr->buf->len;
4391 file = read->rd_nf->nf_file;
4393 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
4395 WARN_ON_ONCE(splice_ok);
4396 return nfserr_resource;
4398 if (resp->xdr->buf->page_len && splice_ok) {
4400 return nfserr_serverfault;
4402 xdr_commit_encode(xdr);
4404 maxcount = min_t(unsigned long, read->rd_length,
4405 (xdr->buf->buflen - xdr->buf->len));
4407 if (file->f_op->splice_read && splice_ok)
4408 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
4410 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
4412 xdr_truncate_encode(xdr, starting_len);
4416 p = xdr_encode_bool(p, read->rd_eof);
4417 *p = cpu_to_be32(read->rd_length);
4422 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr,
4423 union nfsd4_op_u *u)
4425 struct nfsd4_readlink *readlink = &u->readlink;
4426 __be32 *p, *maxcount_p, zero = xdr_zero;
4427 struct xdr_stream *xdr = resp->xdr;
4428 int length_offset = xdr->buf->len;
4429 int maxcount, status;
4431 maxcount_p = xdr_reserve_space(xdr, XDR_UNIT);
4433 return nfserr_resource;
4434 maxcount = PAGE_SIZE;
4436 p = xdr_reserve_space(xdr, maxcount);
4438 return nfserr_resource;
4440 * XXX: By default, vfs_readlink() will truncate symlinks if they
4441 * would overflow the buffer. Is this kosher in NFSv4? If not, one
4442 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
4443 * that truncation occurred, and return NFS4ERR_RESOURCE.
4445 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
4446 (char *)p, &maxcount);
4447 if (nfserr == nfserr_isdir)
4448 nfserr = nfserr_inval;
4451 status = svc_encode_result_payload(readlink->rl_rqstp, length_offset,
4454 nfserr = nfserrno(status);
4457 *maxcount_p = cpu_to_be32(maxcount);
4458 xdr_truncate_encode(xdr, length_offset + 4 + xdr_align_size(maxcount));
4459 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, &zero,
4460 xdr_pad_size(maxcount));
4464 xdr_truncate_encode(xdr, length_offset);
4468 static __be32 nfsd4_encode_dirlist4(struct xdr_stream *xdr,
4469 struct nfsd4_readdir *readdir,
4472 int bytes_left, maxcount, starting_len = xdr->buf->len;
4477 * Number of bytes left for directory entries allowing for the
4478 * final 8 bytes of the readdir and a following failed op.
4480 bytes_left = xdr->buf->buflen - xdr->buf->len -
4481 COMPOUND_ERR_SLACK_SPACE - XDR_UNIT * 2;
4483 return nfserr_resource;
4484 maxcount = min_t(u32, readdir->rd_maxcount, max_payload);
4487 * The RFC defines rd_maxcount as the size of the
4488 * READDIR4resok structure, which includes the verifier
4489 * and the 8 bytes encoded at the end of this function.
4491 if (maxcount < XDR_UNIT * 4)
4492 return nfserr_toosmall;
4493 maxcount = min_t(int, maxcount - XDR_UNIT * 4, bytes_left);
4495 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0 */
4496 if (!readdir->rd_dircount)
4497 readdir->rd_dircount = max_payload;
4501 readdir->rd_maxcount = maxcount;
4502 readdir->common.err = 0;
4503 readdir->cookie_offset = 0;
4504 offset = readdir->rd_cookie;
4505 status = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, &offset,
4506 &readdir->common, nfsd4_encode_entry4);
4509 if (readdir->common.err == nfserr_toosmall &&
4510 xdr->buf->len == starting_len) {
4511 /* No entries were encoded. Which limit did we hit? */
4512 if (maxcount - XDR_UNIT * 4 < bytes_left)
4513 /* It was the fault of rd_maxcount */
4514 return nfserr_toosmall;
4515 /* We ran out of buffer space */
4516 return nfserr_resource;
4518 /* Encode the final entry's cookie value */
4519 nfsd4_encode_entry4_nfs_cookie4(readdir, offset);
4520 /* No entries follow */
4521 if (xdr_stream_encode_item_absent(xdr) != XDR_UNIT)
4522 return nfserr_resource;
4525 return nfsd4_encode_bool(xdr, readdir->common.err == nfserr_eof);
4529 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr,
4530 union nfsd4_op_u *u)
4532 struct nfsd4_readdir *readdir = &u->readdir;
4533 struct xdr_stream *xdr = resp->xdr;
4534 int starting_len = xdr->buf->len;
4537 nfserr = nfsd4_encode_verifier4(xdr, &readdir->rd_verf);
4538 if (nfserr != nfs_ok)
4542 nfserr = nfsd4_encode_dirlist4(xdr, readdir, svc_max_payload(resp->rqstp));
4543 if (nfserr != nfs_ok)
4544 xdr_truncate_encode(xdr, starting_len);
4549 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr,
4550 union nfsd4_op_u *u)
4552 struct nfsd4_remove *remove = &u->remove;
4553 struct xdr_stream *xdr = resp->xdr;
4555 return nfsd4_encode_change_info4(xdr, &remove->rm_cinfo);
4559 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr,
4560 union nfsd4_op_u *u)
4562 struct nfsd4_rename *rename = &u->rename;
4563 struct xdr_stream *xdr = resp->xdr;
4565 nfserr = nfsd4_encode_change_info4(xdr, &rename->rn_sinfo);
4568 return nfsd4_encode_change_info4(xdr, &rename->rn_tinfo);
4572 nfsd4_encode_rpcsec_gss_info(struct xdr_stream *xdr,
4573 struct rpcsec_gss_info *info)
4578 if (xdr_stream_encode_opaque(xdr, info->oid.data, info->oid.len) < 0)
4579 return nfserr_resource;
4581 status = nfsd4_encode_qop4(xdr, info->qop);
4582 if (status != nfs_ok)
4585 if (xdr_stream_encode_u32(xdr, info->service) != XDR_UNIT)
4586 return nfserr_resource;
4592 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
4594 u32 i, nflavs, supported;
4595 struct exp_flavor_info *flavs;
4596 struct exp_flavor_info def_flavs[2];
4597 static bool report = true;
4601 if (exp->ex_nflavors) {
4602 flavs = exp->ex_flavors;
4603 nflavs = exp->ex_nflavors;
4604 } else { /* Handling of some defaults in absence of real secinfo: */
4606 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4608 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4609 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4610 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4612 flavs[0].pseudoflavor
4613 = svcauth_gss_flavor(exp->ex_client);
4616 flavs[0].pseudoflavor
4617 = exp->ex_client->flavour->flavour;
4622 flavorsp = xdr_reserve_space(xdr, XDR_UNIT);
4624 return nfserr_resource;
4626 for (i = 0; i < nflavs; i++) {
4627 rpc_authflavor_t pf = flavs[i].pseudoflavor;
4628 struct rpcsec_gss_info info;
4630 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4634 status = nfsd4_encode_uint32_t(xdr, RPC_AUTH_GSS);
4635 if (status != nfs_ok)
4638 status = nfsd4_encode_rpcsec_gss_info(xdr, &info);
4639 if (status != nfs_ok)
4641 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4645 status = nfsd4_encode_uint32_t(xdr, pf);
4646 if (status != nfs_ok)
4650 pr_warn("NFS: SECINFO: security flavor %u "
4651 "is not supported\n", pf);
4655 if (nflavs != supported)
4657 *flavorsp = cpu_to_be32(supported);
4662 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4663 union nfsd4_op_u *u)
4665 struct nfsd4_secinfo *secinfo = &u->secinfo;
4666 struct xdr_stream *xdr = resp->xdr;
4668 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
4672 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4673 union nfsd4_op_u *u)
4675 struct nfsd4_secinfo_no_name *secinfo = &u->secinfo_no_name;
4676 struct xdr_stream *xdr = resp->xdr;
4678 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
4682 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4683 union nfsd4_op_u *u)
4685 struct nfsd4_setattr *setattr = &u->setattr;
4691 status = nfsd4_encode_bitmap4(resp->xdr, setattr->sa_bmval[0],
4692 setattr->sa_bmval[1],
4693 setattr->sa_bmval[2]);
4697 status = nfsd4_encode_bitmap4(resp->xdr, 0, 0, 0);
4699 return status != nfs_ok ? status : nfserr;
4703 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr,
4704 union nfsd4_op_u *u)
4706 struct nfsd4_setclientid *scd = &u->setclientid;
4707 struct xdr_stream *xdr = resp->xdr;
4710 nfserr = nfsd4_encode_clientid4(xdr, &scd->se_clientid);
4711 if (nfserr != nfs_ok)
4713 nfserr = nfsd4_encode_verifier4(xdr, &scd->se_confirm);
4714 } else if (nfserr == nfserr_clid_inuse) {
4715 /* empty network id */
4716 if (xdr_stream_encode_u32(xdr, 0) < 0) {
4717 nfserr = nfserr_resource;
4720 /* empty universal address */
4721 if (xdr_stream_encode_u32(xdr, 0) < 0) {
4722 nfserr = nfserr_resource;
4731 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr,
4732 union nfsd4_op_u *u)
4734 struct nfsd4_write *write = &u->write;
4735 struct xdr_stream *xdr = resp->xdr;
4738 nfserr = nfsd4_encode_count4(xdr, write->wr_bytes_written);
4742 if (xdr_stream_encode_u32(xdr, write->wr_how_written) != XDR_UNIT)
4743 return nfserr_resource;
4745 return nfsd4_encode_verifier4(xdr, &write->wr_verifier);
4749 nfsd4_encode_state_protect_ops4(struct xdr_stream *xdr,
4750 struct nfsd4_exchange_id *exid)
4754 /* spo_must_enforce */
4755 status = nfsd4_encode_bitmap4(xdr, exid->spo_must_enforce[0],
4756 exid->spo_must_enforce[1],
4757 exid->spo_must_enforce[2]);
4758 if (status != nfs_ok)
4760 /* spo_must_allow */
4761 return nfsd4_encode_bitmap4(xdr, exid->spo_must_allow[0],
4762 exid->spo_must_allow[1],
4763 exid->spo_must_allow[2]);
4767 nfsd4_encode_state_protect4_r(struct xdr_stream *xdr, struct nfsd4_exchange_id *exid)
4771 if (xdr_stream_encode_u32(xdr, exid->spa_how) != XDR_UNIT)
4772 return nfserr_resource;
4773 switch (exid->spa_how) {
4779 status = nfsd4_encode_state_protect_ops4(xdr, exid);
4782 status = nfserr_serverfault;
4788 nfsd4_encode_server_owner4(struct xdr_stream *xdr, struct svc_rqst *rqstp)
4790 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4794 status = nfsd4_encode_uint64_t(xdr, 0);
4795 if (status != nfs_ok)
4798 return nfsd4_encode_opaque(xdr, nn->nfsd_name, strlen(nn->nfsd_name));
4802 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
4803 union nfsd4_op_u *u)
4805 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
4806 struct nfsd4_exchange_id *exid = &u->exchange_id;
4807 struct xdr_stream *xdr = resp->xdr;
4810 nfserr = nfsd4_encode_clientid4(xdr, &exid->clientid);
4811 if (nfserr != nfs_ok)
4813 /* eir_sequenceid */
4814 nfserr = nfsd4_encode_sequenceid4(xdr, exid->seqid);
4815 if (nfserr != nfs_ok)
4818 nfserr = nfsd4_encode_uint32_t(xdr, exid->flags);
4819 if (nfserr != nfs_ok)
4821 /* eir_state_protect */
4822 nfserr = nfsd4_encode_state_protect4_r(xdr, exid);
4823 if (nfserr != nfs_ok)
4825 /* eir_server_owner */
4826 nfserr = nfsd4_encode_server_owner4(xdr, resp->rqstp);
4827 if (nfserr != nfs_ok)
4829 /* eir_server_scope */
4830 nfserr = nfsd4_encode_opaque(xdr, nn->nfsd_name,
4831 strlen(nn->nfsd_name));
4832 if (nfserr != nfs_ok)
4834 /* eir_server_impl_id<1> */
4835 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
4836 return nfserr_resource;
4842 nfsd4_encode_channel_attrs4(struct xdr_stream *xdr,
4843 const struct nfsd4_channel_attrs *attrs)
4847 /* ca_headerpadsize */
4848 status = nfsd4_encode_count4(xdr, 0);
4849 if (status != nfs_ok)
4851 /* ca_maxrequestsize */
4852 status = nfsd4_encode_count4(xdr, attrs->maxreq_sz);
4853 if (status != nfs_ok)
4855 /* ca_maxresponsesize */
4856 status = nfsd4_encode_count4(xdr, attrs->maxresp_sz);
4857 if (status != nfs_ok)
4859 /* ca_maxresponsesize_cached */
4860 status = nfsd4_encode_count4(xdr, attrs->maxresp_cached);
4861 if (status != nfs_ok)
4863 /* ca_maxoperations */
4864 status = nfsd4_encode_count4(xdr, attrs->maxops);
4865 if (status != nfs_ok)
4867 /* ca_maxrequests */
4868 status = nfsd4_encode_count4(xdr, attrs->maxreqs);
4869 if (status != nfs_ok)
4871 /* ca_rdma_ird<1> */
4872 if (xdr_stream_encode_u32(xdr, attrs->nr_rdma_attrs) != XDR_UNIT)
4873 return nfserr_resource;
4874 if (attrs->nr_rdma_attrs)
4875 return nfsd4_encode_uint32_t(xdr, attrs->rdma_attrs);
4880 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4881 union nfsd4_op_u *u)
4883 struct nfsd4_create_session *sess = &u->create_session;
4884 struct xdr_stream *xdr = resp->xdr;
4887 nfserr = nfsd4_encode_sessionid4(xdr, &sess->sessionid);
4888 if (nfserr != nfs_ok)
4891 nfserr = nfsd4_encode_sequenceid4(xdr, sess->seqid);
4892 if (nfserr != nfs_ok)
4895 nfserr = nfsd4_encode_uint32_t(xdr, sess->flags);
4896 if (nfserr != nfs_ok)
4898 /* csr_fore_chan_attrs */
4899 nfserr = nfsd4_encode_channel_attrs4(xdr, &sess->fore_channel);
4900 if (nfserr != nfs_ok)
4902 /* csr_back_chan_attrs */
4903 return nfsd4_encode_channel_attrs4(xdr, &sess->back_channel);
4907 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4908 union nfsd4_op_u *u)
4910 struct nfsd4_sequence *seq = &u->sequence;
4911 struct xdr_stream *xdr = resp->xdr;
4914 nfserr = nfsd4_encode_sessionid4(xdr, &seq->sessionid);
4915 if (nfserr != nfs_ok)
4918 nfserr = nfsd4_encode_sequenceid4(xdr, seq->seqid);
4919 if (nfserr != nfs_ok)
4922 nfserr = nfsd4_encode_slotid4(xdr, seq->slotid);
4923 if (nfserr != nfs_ok)
4925 /* Note slotid's are numbered from zero: */
4926 /* sr_highest_slotid */
4927 nfserr = nfsd4_encode_slotid4(xdr, seq->maxslots - 1);
4928 if (nfserr != nfs_ok)
4930 /* sr_target_highest_slotid */
4931 nfserr = nfsd4_encode_slotid4(xdr, seq->maxslots - 1);
4932 if (nfserr != nfs_ok)
4934 /* sr_status_flags */
4935 nfserr = nfsd4_encode_uint32_t(xdr, seq->status_flags);
4936 if (nfserr != nfs_ok)
4939 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4944 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4945 union nfsd4_op_u *u)
4947 struct nfsd4_test_stateid *test_stateid = &u->test_stateid;
4948 struct nfsd4_test_stateid_id *stateid, *next;
4949 struct xdr_stream *xdr = resp->xdr;
4951 /* tsr_status_codes<> */
4952 if (xdr_stream_encode_u32(xdr, test_stateid->ts_num_ids) != XDR_UNIT)
4953 return nfserr_resource;
4954 list_for_each_entry_safe(stateid, next,
4955 &test_stateid->ts_stateid_list, ts_id_list) {
4956 if (xdr_stream_encode_be32(xdr, stateid->ts_id_status) != XDR_UNIT)
4957 return nfserr_resource;
4962 #ifdef CONFIG_NFSD_PNFS
4964 nfsd4_encode_device_addr4(struct xdr_stream *xdr,
4965 const struct nfsd4_getdeviceinfo *gdev)
4967 u32 needed_len, starting_len = xdr->buf->len;
4968 const struct nfsd4_layout_ops *ops;
4971 /* da_layout_type */
4972 if (xdr_stream_encode_u32(xdr, gdev->gd_layout_type) != XDR_UNIT)
4973 return nfserr_resource;
4975 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4976 status = ops->encode_getdeviceinfo(xdr, gdev);
4977 if (status != nfs_ok) {
4979 * Don't burden the layout drivers with enforcing
4980 * gd_maxcount. Just tell the client to come back
4981 * with a bigger buffer if it's not enough.
4983 if (xdr->buf->len + XDR_UNIT > gdev->gd_maxcount)
4991 needed_len = xdr->buf->len + XDR_UNIT; /* notifications */
4992 xdr_truncate_encode(xdr, starting_len);
4994 status = nfsd4_encode_count4(xdr, needed_len);
4995 if (status != nfs_ok)
4997 return nfserr_toosmall;
5001 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
5002 union nfsd4_op_u *u)
5004 struct nfsd4_getdeviceinfo *gdev = &u->getdeviceinfo;
5005 struct xdr_stream *xdr = resp->xdr;
5007 /* gdir_device_addr */
5008 nfserr = nfsd4_encode_device_addr4(xdr, gdev);
5011 /* gdir_notification */
5012 return nfsd4_encode_bitmap4(xdr, gdev->gd_notify_types, 0, 0);
5016 nfsd4_encode_layout4(struct xdr_stream *xdr, const struct nfsd4_layoutget *lgp)
5018 const struct nfsd4_layout_ops *ops = nfsd4_layout_ops[lgp->lg_layout_type];
5022 status = nfsd4_encode_offset4(xdr, lgp->lg_seg.offset);
5023 if (status != nfs_ok)
5026 status = nfsd4_encode_length4(xdr, lgp->lg_seg.length);
5027 if (status != nfs_ok)
5030 if (xdr_stream_encode_u32(xdr, lgp->lg_seg.iomode) != XDR_UNIT)
5031 return nfserr_resource;
5033 if (xdr_stream_encode_u32(xdr, lgp->lg_layout_type) != XDR_UNIT)
5034 return nfserr_resource;
5035 return ops->encode_layoutget(xdr, lgp);
5039 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
5040 union nfsd4_op_u *u)
5042 struct nfsd4_layoutget *lgp = &u->layoutget;
5043 struct xdr_stream *xdr = resp->xdr;
5045 /* logr_return_on_close */
5046 nfserr = nfsd4_encode_bool(xdr, true);
5047 if (nfserr != nfs_ok)
5050 nfserr = nfsd4_encode_stateid4(xdr, &lgp->lg_sid);
5051 if (nfserr != nfs_ok)
5054 if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT)
5055 return nfserr_resource;
5056 return nfsd4_encode_layout4(xdr, lgp);
5060 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
5061 union nfsd4_op_u *u)
5063 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
5064 struct xdr_stream *xdr = resp->xdr;
5066 /* ns_sizechanged */
5067 nfserr = nfsd4_encode_bool(xdr, lcp->lc_size_chg);
5068 if (nfserr != nfs_ok)
5070 if (lcp->lc_size_chg)
5072 return nfsd4_encode_length4(xdr, lcp->lc_newsize);
5077 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
5078 union nfsd4_op_u *u)
5080 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
5081 struct xdr_stream *xdr = resp->xdr;
5084 nfserr = nfsd4_encode_bool(xdr, lrp->lrs_present);
5085 if (nfserr != nfs_ok)
5087 if (lrp->lrs_present)
5089 return nfsd4_encode_stateid4(xdr, &lrp->lr_sid);
5092 #endif /* CONFIG_NFSD_PNFS */
5095 nfsd4_encode_write_response4(struct xdr_stream *xdr,
5096 const struct nfsd4_copy *copy)
5098 const struct nfsd42_write_res *write = ©->cp_res;
5099 u32 count = nfsd4_copy_is_sync(copy) ? 0 : 1;
5102 /* wr_callback_id<1> */
5103 if (xdr_stream_encode_u32(xdr, count) != XDR_UNIT)
5104 return nfserr_resource;
5106 status = nfsd4_encode_stateid4(xdr, &write->cb_stateid);
5107 if (status != nfs_ok)
5112 status = nfsd4_encode_length4(xdr, write->wr_bytes_written);
5113 if (status != nfs_ok)
5116 if (xdr_stream_encode_u32(xdr, write->wr_stable_how) != XDR_UNIT)
5117 return nfserr_resource;
5119 return nfsd4_encode_verifier4(xdr, &write->wr_verifier);
5122 static __be32 nfsd4_encode_copy_requirements4(struct xdr_stream *xdr,
5123 const struct nfsd4_copy *copy)
5127 /* cr_consecutive */
5128 status = nfsd4_encode_bool(xdr, true);
5129 if (status != nfs_ok)
5131 /* cr_synchronous */
5132 return nfsd4_encode_bool(xdr, nfsd4_copy_is_sync(copy));
5136 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
5137 union nfsd4_op_u *u)
5139 struct nfsd4_copy *copy = &u->copy;
5141 nfserr = nfsd4_encode_write_response4(resp->xdr, copy);
5142 if (nfserr != nfs_ok)
5144 return nfsd4_encode_copy_requirements4(resp->xdr, copy);
5148 nfsd4_encode_netloc4(struct xdr_stream *xdr, const struct nl4_server *ns)
5152 if (xdr_stream_encode_u32(xdr, ns->nl4_type) != XDR_UNIT)
5153 return nfserr_resource;
5154 switch (ns->nl4_type) {
5157 status = nfsd4_encode_netaddr4(xdr, &ns->u.nl4_addr);
5160 status = nfserr_serverfault;
5166 nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
5167 union nfsd4_op_u *u)
5169 struct nfsd4_copy_notify *cn = &u->copy_notify;
5170 struct xdr_stream *xdr = resp->xdr;
5172 /* cnr_lease_time */
5173 nfserr = nfsd4_encode_nfstime4(xdr, &cn->cpn_lease_time);
5177 nfserr = nfsd4_encode_stateid4(xdr, &cn->cpn_cnr_stateid);
5180 /* cnr_source_server<> */
5181 if (xdr_stream_encode_u32(xdr, 1) != XDR_UNIT)
5182 return nfserr_resource;
5183 return nfsd4_encode_netloc4(xdr, cn->cpn_src);
5187 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
5188 union nfsd4_op_u *u)
5190 struct nfsd4_offload_status *os = &u->offload_status;
5191 struct xdr_stream *xdr = resp->xdr;
5194 nfserr = nfsd4_encode_length4(xdr, os->count);
5195 if (nfserr != nfs_ok)
5197 /* osr_complete<1> */
5198 if (xdr_stream_encode_u32(xdr, 0) != XDR_UNIT)
5199 return nfserr_resource;
5204 nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
5205 struct nfsd4_read *read)
5207 bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags);
5208 struct file *file = read->rd_nf->nf_file;
5209 struct xdr_stream *xdr = resp->xdr;
5210 unsigned long maxcount;
5213 /* Content type, offset, byte count */
5214 p = xdr_reserve_space(xdr, 4 + 8 + 4);
5217 if (resp->xdr->buf->page_len && splice_ok) {
5218 WARN_ON_ONCE(splice_ok);
5219 return nfserr_serverfault;
5222 maxcount = min_t(unsigned long, read->rd_length,
5223 (xdr->buf->buflen - xdr->buf->len));
5225 if (file->f_op->splice_read && splice_ok)
5226 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
5228 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
5232 *p++ = cpu_to_be32(NFS4_CONTENT_DATA);
5233 p = xdr_encode_hyper(p, read->rd_offset);
5234 *p = cpu_to_be32(read->rd_length);
5240 nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
5241 union nfsd4_op_u *u)
5243 struct nfsd4_read *read = &u->read;
5244 struct file *file = read->rd_nf->nf_file;
5245 struct xdr_stream *xdr = resp->xdr;
5246 int starting_len = xdr->buf->len;
5253 /* eof flag, segment count */
5254 p = xdr_reserve_space(xdr, 4 + 4);
5257 xdr_commit_encode(xdr);
5259 read->rd_eof = read->rd_offset >= i_size_read(file_inode(file));
5263 nfserr = nfsd4_encode_read_plus_data(resp, read);
5265 xdr_truncate_encode(xdr, starting_len);
5272 p = xdr_encode_bool(p, read->rd_eof);
5273 *p = cpu_to_be32(segments);
5278 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
5279 union nfsd4_op_u *u)
5281 struct nfsd4_seek *seek = &u->seek;
5282 struct xdr_stream *xdr = resp->xdr;
5285 nfserr = nfsd4_encode_bool(xdr, seek->seek_eof);
5286 if (nfserr != nfs_ok)
5289 return nfsd4_encode_offset4(xdr, seek->seek_pos);
5293 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr,
5294 union nfsd4_op_u *p)
5300 * Encode kmalloc-ed buffer in to XDR stream.
5303 nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
5308 cplen = min_t(unsigned long, buflen,
5309 ((void *)xdr->end - (void *)xdr->p));
5310 p = xdr_reserve_space(xdr, cplen);
5312 return nfserr_resource;
5314 memcpy(p, buf, cplen);
5319 cplen = min_t(u32, buflen, PAGE_SIZE);
5320 p = xdr_reserve_space(xdr, cplen);
5322 return nfserr_resource;
5324 memcpy(p, buf, cplen);
5326 if (cplen < PAGE_SIZE) {
5328 * We're done, with a length that wasn't page
5329 * aligned, so possibly not word aligned. Pad
5330 * any trailing bytes with 0.
5332 xdr_encode_opaque_fixed(p, NULL, cplen);
5336 buflen -= PAGE_SIZE;
5344 nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5345 union nfsd4_op_u *u)
5347 struct nfsd4_getxattr *getxattr = &u->getxattr;
5348 struct xdr_stream *xdr = resp->xdr;
5351 p = xdr_reserve_space(xdr, 4);
5353 return nfserr_resource;
5355 *p = cpu_to_be32(getxattr->getxa_len);
5357 if (getxattr->getxa_len == 0)
5360 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
5361 getxattr->getxa_len);
5363 kvfree(getxattr->getxa_buf);
5369 nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5370 union nfsd4_op_u *u)
5372 struct nfsd4_setxattr *setxattr = &u->setxattr;
5373 struct xdr_stream *xdr = resp->xdr;
5375 return nfsd4_encode_change_info4(xdr, &setxattr->setxa_cinfo);
5379 * See if there are cookie values that can be rejected outright.
5382 nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
5385 u64 cookie = listxattrs->lsxa_cookie;
5388 * If the cookie is larger than the maximum number we can fit
5389 * in either the buffer we just got back from vfs_listxattr, or,
5390 * XDR-encoded, in the return buffer, it's invalid.
5392 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
5393 return nfserr_badcookie;
5395 if (cookie > (listxattrs->lsxa_maxcount /
5396 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
5397 return nfserr_badcookie;
5399 *offsetp = (u32)cookie;
5404 nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
5405 union nfsd4_op_u *u)
5407 struct nfsd4_listxattrs *listxattrs = &u->listxattrs;
5408 struct xdr_stream *xdr = resp->xdr;
5409 u32 cookie_offset, count_offset, eof;
5410 u32 left, xdrleft, slen, count;
5420 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
5425 * Reserve space for the cookie and the name array count. Record
5426 * the offsets to save them later.
5428 cookie_offset = xdr->buf->len;
5429 count_offset = cookie_offset + 8;
5430 p = xdr_reserve_space(xdr, 12);
5432 status = nfserr_resource;
5437 left = listxattrs->lsxa_len;
5438 sp = listxattrs->lsxa_buf;
5441 xdrleft = listxattrs->lsxa_maxcount;
5443 while (left > 0 && xdrleft > 0) {
5447 * Check if this is a "user." attribute, skip it if not.
5449 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
5452 slen -= XATTR_USER_PREFIX_LEN;
5453 xdrlen = 4 + ((slen + 3) & ~3);
5454 if (xdrlen > xdrleft) {
5457 * Can't even fit the first attribute name.
5459 status = nfserr_toosmall;
5466 left -= XATTR_USER_PREFIX_LEN;
5467 sp += XATTR_USER_PREFIX_LEN;
5468 if (nuser++ < offset)
5472 p = xdr_reserve_space(xdr, xdrlen);
5474 status = nfserr_resource;
5478 xdr_encode_opaque(p, sp, slen);
5488 * If there were user attributes to copy, but we didn't copy
5489 * any, the offset was too large (e.g. the cookie was invalid).
5491 if (nuser > 0 && count == 0) {
5492 status = nfserr_badcookie;
5497 p = xdr_reserve_space(xdr, 4);
5499 status = nfserr_resource;
5502 *p = cpu_to_be32(eof);
5504 cookie = offset + count;
5506 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
5507 tmp = cpu_to_be32(count);
5508 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
5510 if (listxattrs->lsxa_len)
5511 kvfree(listxattrs->lsxa_buf);
5516 nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5517 union nfsd4_op_u *u)
5519 struct nfsd4_removexattr *removexattr = &u->removexattr;
5520 struct xdr_stream *xdr = resp->xdr;
5522 return nfsd4_encode_change_info4(xdr, &removexattr->rmxa_cinfo);
5525 typedef __be32(*nfsd4_enc)(struct nfsd4_compoundres *, __be32, union nfsd4_op_u *u);
5528 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5529 * since we don't need to filter out obsolete ops as this is
5530 * done in the decoding phase.
5532 static const nfsd4_enc nfsd4_enc_ops[] = {
5533 [OP_ACCESS] = nfsd4_encode_access,
5534 [OP_CLOSE] = nfsd4_encode_close,
5535 [OP_COMMIT] = nfsd4_encode_commit,
5536 [OP_CREATE] = nfsd4_encode_create,
5537 [OP_DELEGPURGE] = nfsd4_encode_noop,
5538 [OP_DELEGRETURN] = nfsd4_encode_noop,
5539 [OP_GETATTR] = nfsd4_encode_getattr,
5540 [OP_GETFH] = nfsd4_encode_getfh,
5541 [OP_LINK] = nfsd4_encode_link,
5542 [OP_LOCK] = nfsd4_encode_lock,
5543 [OP_LOCKT] = nfsd4_encode_lockt,
5544 [OP_LOCKU] = nfsd4_encode_locku,
5545 [OP_LOOKUP] = nfsd4_encode_noop,
5546 [OP_LOOKUPP] = nfsd4_encode_noop,
5547 [OP_NVERIFY] = nfsd4_encode_noop,
5548 [OP_OPEN] = nfsd4_encode_open,
5549 [OP_OPENATTR] = nfsd4_encode_noop,
5550 [OP_OPEN_CONFIRM] = nfsd4_encode_open_confirm,
5551 [OP_OPEN_DOWNGRADE] = nfsd4_encode_open_downgrade,
5552 [OP_PUTFH] = nfsd4_encode_noop,
5553 [OP_PUTPUBFH] = nfsd4_encode_noop,
5554 [OP_PUTROOTFH] = nfsd4_encode_noop,
5555 [OP_READ] = nfsd4_encode_read,
5556 [OP_READDIR] = nfsd4_encode_readdir,
5557 [OP_READLINK] = nfsd4_encode_readlink,
5558 [OP_REMOVE] = nfsd4_encode_remove,
5559 [OP_RENAME] = nfsd4_encode_rename,
5560 [OP_RENEW] = nfsd4_encode_noop,
5561 [OP_RESTOREFH] = nfsd4_encode_noop,
5562 [OP_SAVEFH] = nfsd4_encode_noop,
5563 [OP_SECINFO] = nfsd4_encode_secinfo,
5564 [OP_SETATTR] = nfsd4_encode_setattr,
5565 [OP_SETCLIENTID] = nfsd4_encode_setclientid,
5566 [OP_SETCLIENTID_CONFIRM] = nfsd4_encode_noop,
5567 [OP_VERIFY] = nfsd4_encode_noop,
5568 [OP_WRITE] = nfsd4_encode_write,
5569 [OP_RELEASE_LOCKOWNER] = nfsd4_encode_noop,
5571 /* NFSv4.1 operations */
5572 [OP_BACKCHANNEL_CTL] = nfsd4_encode_noop,
5573 [OP_BIND_CONN_TO_SESSION] = nfsd4_encode_bind_conn_to_session,
5574 [OP_EXCHANGE_ID] = nfsd4_encode_exchange_id,
5575 [OP_CREATE_SESSION] = nfsd4_encode_create_session,
5576 [OP_DESTROY_SESSION] = nfsd4_encode_noop,
5577 [OP_FREE_STATEID] = nfsd4_encode_noop,
5578 [OP_GET_DIR_DELEGATION] = nfsd4_encode_noop,
5579 #ifdef CONFIG_NFSD_PNFS
5580 [OP_GETDEVICEINFO] = nfsd4_encode_getdeviceinfo,
5581 [OP_GETDEVICELIST] = nfsd4_encode_noop,
5582 [OP_LAYOUTCOMMIT] = nfsd4_encode_layoutcommit,
5583 [OP_LAYOUTGET] = nfsd4_encode_layoutget,
5584 [OP_LAYOUTRETURN] = nfsd4_encode_layoutreturn,
5586 [OP_GETDEVICEINFO] = nfsd4_encode_noop,
5587 [OP_GETDEVICELIST] = nfsd4_encode_noop,
5588 [OP_LAYOUTCOMMIT] = nfsd4_encode_noop,
5589 [OP_LAYOUTGET] = nfsd4_encode_noop,
5590 [OP_LAYOUTRETURN] = nfsd4_encode_noop,
5592 [OP_SECINFO_NO_NAME] = nfsd4_encode_secinfo_no_name,
5593 [OP_SEQUENCE] = nfsd4_encode_sequence,
5594 [OP_SET_SSV] = nfsd4_encode_noop,
5595 [OP_TEST_STATEID] = nfsd4_encode_test_stateid,
5596 [OP_WANT_DELEGATION] = nfsd4_encode_noop,
5597 [OP_DESTROY_CLIENTID] = nfsd4_encode_noop,
5598 [OP_RECLAIM_COMPLETE] = nfsd4_encode_noop,
5600 /* NFSv4.2 operations */
5601 [OP_ALLOCATE] = nfsd4_encode_noop,
5602 [OP_COPY] = nfsd4_encode_copy,
5603 [OP_COPY_NOTIFY] = nfsd4_encode_copy_notify,
5604 [OP_DEALLOCATE] = nfsd4_encode_noop,
5605 [OP_IO_ADVISE] = nfsd4_encode_noop,
5606 [OP_LAYOUTERROR] = nfsd4_encode_noop,
5607 [OP_LAYOUTSTATS] = nfsd4_encode_noop,
5608 [OP_OFFLOAD_CANCEL] = nfsd4_encode_noop,
5609 [OP_OFFLOAD_STATUS] = nfsd4_encode_offload_status,
5610 [OP_READ_PLUS] = nfsd4_encode_read_plus,
5611 [OP_SEEK] = nfsd4_encode_seek,
5612 [OP_WRITE_SAME] = nfsd4_encode_noop,
5613 [OP_CLONE] = nfsd4_encode_noop,
5615 /* RFC 8276 extended atributes operations */
5616 [OP_GETXATTR] = nfsd4_encode_getxattr,
5617 [OP_SETXATTR] = nfsd4_encode_setxattr,
5618 [OP_LISTXATTRS] = nfsd4_encode_listxattrs,
5619 [OP_REMOVEXATTR] = nfsd4_encode_removexattr,
5623 * Calculate whether we still have space to encode repsize bytes.
5624 * There are two considerations:
5625 * - For NFS versions >=4.1, the size of the reply must stay within
5627 * - For all NFS versions, we must stay within limited preallocated
5630 * This is called before the operation is processed, so can only provide
5631 * an upper estimate. For some nonidempotent operations (such as
5632 * getattr), it's not necessarily a problem if that estimate is wrong,
5633 * as we can fail it after processing without significant side effects.
5635 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
5637 struct xdr_buf *buf = &resp->rqstp->rq_res;
5638 struct nfsd4_slot *slot = resp->cstate.slot;
5640 if (buf->len + respsize <= buf->buflen)
5642 if (!nfsd4_has_session(&resp->cstate))
5643 return nfserr_resource;
5644 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5646 return nfserr_rep_too_big_to_cache;
5648 return nfserr_rep_too_big;
5652 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5654 struct xdr_stream *xdr = resp->xdr;
5655 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5656 struct svc_rqst *rqstp = resp->rqstp;
5657 const struct nfsd4_operation *opdesc = op->opdesc;
5658 int post_err_offset;
5662 p = xdr_reserve_space(xdr, 8);
5665 *p++ = cpu_to_be32(op->opnum);
5666 post_err_offset = xdr->buf->len;
5668 if (op->opnum == OP_ILLEGAL)
5670 if (op->status && opdesc &&
5671 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5673 BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
5674 !nfsd4_enc_ops[op->opnum]);
5675 encoder = nfsd4_enc_ops[op->opnum];
5676 op->status = encoder(resp, op->status, &op->u);
5678 trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status);
5679 xdr_commit_encode(xdr);
5681 /* nfsd4_check_resp_size guarantees enough room for error status */
5683 int space_needed = 0;
5684 if (!nfsd4_last_compound_op(rqstp))
5685 space_needed = COMPOUND_ERR_SLACK_SPACE;
5686 op->status = nfsd4_check_resp_size(resp, space_needed);
5688 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5689 struct nfsd4_slot *slot = resp->cstate.slot;
5691 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5692 op->status = nfserr_rep_too_big_to_cache;
5694 op->status = nfserr_rep_too_big;
5696 if (op->status == nfserr_resource ||
5697 op->status == nfserr_rep_too_big ||
5698 op->status == nfserr_rep_too_big_to_cache) {
5700 * The operation may have already been encoded or
5701 * partially encoded. No op returns anything additional
5702 * in the case of one of these three errors, so we can
5703 * just truncate back to after the status. But it's a
5704 * bug if we had to do this on a non-idempotent op:
5706 warn_on_nonidempotent_op(op);
5707 xdr_truncate_encode(xdr, post_err_offset);
5710 int len = xdr->buf->len - post_err_offset;
5712 so->so_replay.rp_status = op->status;
5713 so->so_replay.rp_buflen = len;
5714 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5715 so->so_replay.rp_buf, len);
5720 if (opdesc && opdesc->op_release)
5721 opdesc->op_release(&op->u);
5724 * Account for pages consumed while encoding this operation.
5725 * The xdr_stream primitives don't manage rq_next_page.
5727 rqstp->rq_next_page = xdr->page_ptr + 1;
5731 * Encode the reply stored in the stateowner reply cache
5733 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5734 * previously sent already encoded operation.
5737 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
5740 struct nfs4_replay *rp = op->replay;
5742 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5747 *p++ = cpu_to_be32(op->opnum);
5748 *p++ = rp->rp_status; /* already xdr'ed */
5750 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
5753 void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
5755 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5757 if (args->ops != args->iops) {
5759 args->ops = args->iops;
5761 while (args->to_free) {
5762 struct svcxdr_tmpbuf *tb = args->to_free;
5763 args->to_free = tb->next;
5769 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, struct xdr_stream *xdr)
5771 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5773 /* svcxdr_tmp_alloc */
5774 args->to_free = NULL;
5777 args->ops = args->iops;
5778 args->rqstp = rqstp;
5780 return nfsd4_decode_compound(args);
5784 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, struct xdr_stream *xdr)
5786 struct nfsd4_compoundres *resp = rqstp->rq_resp;
5790 * Send buffer space for the following items is reserved
5791 * at the top of nfsd4_proc_compound().
5795 *p++ = resp->cstate.status;
5796 *p++ = htonl(resp->taglen);
5797 memcpy(p, resp->tag, resp->taglen);
5798 p += XDR_QUADLEN(resp->taglen);
5799 *p++ = htonl(resp->opcnt);
5801 nfsd4_sequence_done(resp);