2 * Server-side XDR for NFSv4
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include <linux/slab.h>
37 #include <linux/namei.h>
38 #include <linux/statfs.h>
39 #include <linux/utsname.h>
40 #include <linux/pagemap.h>
41 #include <linux/sunrpc/svcauth_gss.h>
51 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
52 #include <linux/security.h>
56 #define NFSDDBG_FACILITY NFSDDBG_XDR
59 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
60 * directory in order to indicate to the client that a filesystem boundary is present
61 * We use a fixed fsid for a referral
63 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
64 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
67 check_filename(char *str, int len)
73 if (isdotent(str, len))
74 return nfserr_badname;
75 for (i = 0; i < len; i++)
77 return nfserr_badname;
89 dprintk("NFSD: xdr error (%s:%d)\n", \
90 __FILE__, __LINE__); \
91 status = nfserr_bad_xdr; \
94 #define READMEM(x,nbytes) do { \
96 p += XDR_QUADLEN(nbytes); \
98 #define SAVEMEM(x,nbytes) do { \
99 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
100 savemem(argp, p, nbytes) : \
102 dprintk("NFSD: xdr error (%s:%d)\n", \
103 __FILE__, __LINE__); \
106 p += XDR_QUADLEN(nbytes); \
108 #define COPYMEM(x,nbytes) do { \
109 memcpy((x), p, nbytes); \
110 p += XDR_QUADLEN(nbytes); \
113 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
114 #define READ_BUF(nbytes) do { \
115 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
117 argp->p += XDR_QUADLEN(nbytes); \
118 } else if (!(p = read_buf(argp, nbytes))) { \
119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
125 static void next_decode_page(struct nfsd4_compoundargs *argp)
127 argp->p = page_address(argp->pagelist[0]);
129 if (argp->pagelen < PAGE_SIZE) {
130 argp->end = argp->p + (argp->pagelen>>2);
133 argp->end = argp->p + (PAGE_SIZE>>2);
134 argp->pagelen -= PAGE_SIZE;
138 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
140 /* We want more bytes than seem to be available.
141 * Maybe we need a new page, maybe we have just run out
143 unsigned int avail = (char *)argp->end - (char *)argp->p;
145 if (avail + argp->pagelen < nbytes)
147 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
149 /* ok, we can do it with the current plus the next page */
150 if (nbytes <= sizeof(argp->tmp))
154 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
160 * The following memcpy is safe because read_buf is always
161 * called with nbytes > avail, and the two cases above both
162 * guarantee p points to at least nbytes bytes.
164 memcpy(p, argp->p, avail);
165 next_decode_page(argp);
166 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
167 argp->p += XDR_QUADLEN(nbytes - avail);
171 static int zero_clientid(clientid_t *clid)
173 return (clid->cl_boot == 0) && (clid->cl_id == 0);
177 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
178 * @argp: NFSv4 compound argument structure
179 * @p: pointer to be freed (with kfree())
181 * Marks @p to be freed when processing the compound operation
182 * described in @argp finishes.
185 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
187 struct svcxdr_tmpbuf *tb;
189 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
192 tb->next = argp->to_free;
198 * For xdr strings that need to be passed to other kernel api's
199 * as null-terminated strings.
201 * Note null-terminating in place usually isn't safe since the
202 * buffer might end on a page boundary.
205 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
207 char *p = svcxdr_tmpalloc(argp, len + 1);
217 * savemem - duplicate a chunk of memory for later processing
218 * @argp: NFSv4 compound argument structure to be freed with
219 * @p: pointer to be duplicated
220 * @nbytes: length to be duplicated
222 * Returns a pointer to a copy of @nbytes bytes of memory at @p
223 * that are preserved until processing of the NFSv4 compound
224 * operation described by @argp finishes.
226 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
230 ret = svcxdr_tmpalloc(argp, nbytes);
233 memcpy(ret, p, nbytes);
238 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
248 bmlen = be32_to_cpup(p++);
252 READ_BUF(bmlen << 2);
254 bmval[0] = be32_to_cpup(p++);
256 bmval[1] = be32_to_cpup(p++);
258 bmval[2] = be32_to_cpup(p++);
264 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
265 struct iattr *iattr, struct nfs4_acl **acl,
266 struct xdr_netobj *label)
268 int expected_len, len = 0;
275 if ((status = nfsd4_decode_bitmap(argp, bmval)))
279 expected_len = be32_to_cpup(p++);
281 if (bmval[0] & FATTR4_WORD0_SIZE) {
284 p = xdr_decode_hyper(p, &iattr->ia_size);
285 iattr->ia_valid |= ATTR_SIZE;
287 if (bmval[0] & FATTR4_WORD0_ACL) {
289 struct nfs4_ace *ace;
291 READ_BUF(4); len += 4;
292 nace = be32_to_cpup(p++);
294 if (nace > NFS4_ACL_MAX)
297 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
299 return nfserr_jukebox;
301 (*acl)->naces = nace;
302 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
303 READ_BUF(16); len += 16;
304 ace->type = be32_to_cpup(p++);
305 ace->flag = be32_to_cpup(p++);
306 ace->access_mask = be32_to_cpup(p++);
307 dummy32 = be32_to_cpup(p++);
309 len += XDR_QUADLEN(dummy32) << 2;
310 READMEM(buf, dummy32);
311 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
313 if (ace->whotype != NFS4_ACL_WHO_NAMED)
315 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
316 status = nfsd_map_name_to_gid(argp->rqstp,
317 buf, dummy32, &ace->who_gid);
319 status = nfsd_map_name_to_uid(argp->rqstp,
320 buf, dummy32, &ace->who_uid);
326 if (bmval[1] & FATTR4_WORD1_MODE) {
329 iattr->ia_mode = be32_to_cpup(p++);
330 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
331 iattr->ia_valid |= ATTR_MODE;
333 if (bmval[1] & FATTR4_WORD1_OWNER) {
336 dummy32 = be32_to_cpup(p++);
338 len += (XDR_QUADLEN(dummy32) << 2);
339 READMEM(buf, dummy32);
340 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
342 iattr->ia_valid |= ATTR_UID;
344 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
347 dummy32 = be32_to_cpup(p++);
349 len += (XDR_QUADLEN(dummy32) << 2);
350 READMEM(buf, dummy32);
351 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
353 iattr->ia_valid |= ATTR_GID;
355 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
358 dummy32 = be32_to_cpup(p++);
360 case NFS4_SET_TO_CLIENT_TIME:
361 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
362 all 32 bits of 'nseconds'. */
365 p = xdr_decode_hyper(p, &sec);
366 iattr->ia_atime.tv_sec = (time_t)sec;
367 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
368 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
370 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
372 case NFS4_SET_TO_SERVER_TIME:
373 iattr->ia_valid |= ATTR_ATIME;
379 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
382 dummy32 = be32_to_cpup(p++);
384 case NFS4_SET_TO_CLIENT_TIME:
385 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
386 all 32 bits of 'nseconds'. */
389 p = xdr_decode_hyper(p, &sec);
390 iattr->ia_mtime.tv_sec = sec;
391 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
392 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
394 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
396 case NFS4_SET_TO_SERVER_TIME:
397 iattr->ia_valid |= ATTR_MTIME;
405 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
406 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
409 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
412 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
415 dummy32 = be32_to_cpup(p++);
417 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
418 return nfserr_badlabel;
419 len += (XDR_QUADLEN(dummy32) << 2);
420 READMEM(buf, dummy32);
421 label->len = dummy32;
422 label->data = svcxdr_dupstr(argp, buf, dummy32);
424 return nfserr_jukebox;
428 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
429 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
430 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
431 READ_BUF(expected_len - len);
432 else if (len != expected_len)
439 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
443 READ_BUF(sizeof(stateid_t));
444 sid->si_generation = be32_to_cpup(p++);
445 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
451 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
456 access->ac_req_access = be32_to_cpup(p++);
461 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
469 /* callback_sec_params4 */
471 nr_secflavs = be32_to_cpup(p++);
473 cbs->flavor = (u32)(-1);
475 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
477 for (i = 0; i < nr_secflavs; ++i) {
479 dummy = be32_to_cpup(p++);
482 /* Nothing to read */
483 if (cbs->flavor == (u32)(-1))
484 cbs->flavor = RPC_AUTH_NULL;
489 dummy = be32_to_cpup(p++);
492 dummy = be32_to_cpup(p++);
494 SAVEMEM(machine_name, dummy);
498 uid = be32_to_cpup(p++);
499 gid = be32_to_cpup(p++);
503 dummy = be32_to_cpup(p++);
505 if (cbs->flavor == (u32)(-1)) {
506 kuid_t kuid = make_kuid(&init_user_ns, uid);
507 kgid_t kgid = make_kgid(&init_user_ns, gid);
508 if (uid_valid(kuid) && gid_valid(kgid)) {
511 cbs->flavor = RPC_AUTH_UNIX;
513 dprintk("RPC_AUTH_UNIX with invalid"
514 "uid or gid ignoring!\n");
519 dprintk("RPC_AUTH_GSS callback secflavor "
523 dummy = be32_to_cpup(p++);
524 /* gcbp_handle_from_server */
525 dummy = be32_to_cpup(p++);
527 p += XDR_QUADLEN(dummy);
528 /* gcbp_handle_from_client */
530 dummy = be32_to_cpup(p++);
534 dprintk("Illegal callback secflavor\n");
541 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
546 bc->bc_cb_program = be32_to_cpup(p++);
547 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
552 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
556 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
557 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
558 bcts->dir = be32_to_cpup(p++);
559 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
560 * could help us figure out we should be using it. */
565 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
570 close->cl_seqid = be32_to_cpup(p++);
571 return nfsd4_decode_stateid(argp, &close->cl_stateid);
578 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
583 p = xdr_decode_hyper(p, &commit->co_offset);
584 commit->co_count = be32_to_cpup(p++);
590 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
595 create->cr_type = be32_to_cpup(p++);
596 switch (create->cr_type) {
599 create->cr_datalen = be32_to_cpup(p++);
600 READ_BUF(create->cr_datalen);
601 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
602 if (!create->cr_data)
603 return nfserr_jukebox;
608 create->cr_specdata1 = be32_to_cpup(p++);
609 create->cr_specdata2 = be32_to_cpup(p++);
619 create->cr_namelen = be32_to_cpup(p++);
620 READ_BUF(create->cr_namelen);
621 SAVEMEM(create->cr_name, create->cr_namelen);
622 if ((status = check_filename(create->cr_name, create->cr_namelen)))
625 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
626 &create->cr_acl, &create->cr_label);
634 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
636 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
640 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
642 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
646 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
651 link->li_namelen = be32_to_cpup(p++);
652 READ_BUF(link->li_namelen);
653 SAVEMEM(link->li_name, link->li_namelen);
654 if ((status = check_filename(link->li_name, link->li_namelen)))
661 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
666 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
669 lock->lk_type = be32_to_cpup(p++);
670 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
672 lock->lk_reclaim = be32_to_cpup(p++);
673 p = xdr_decode_hyper(p, &lock->lk_offset);
674 p = xdr_decode_hyper(p, &lock->lk_length);
675 lock->lk_is_new = be32_to_cpup(p++);
677 if (lock->lk_is_new) {
679 lock->lk_new_open_seqid = be32_to_cpup(p++);
680 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
683 READ_BUF(8 + sizeof(clientid_t));
684 lock->lk_new_lock_seqid = be32_to_cpup(p++);
685 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
686 lock->lk_new_owner.len = be32_to_cpup(p++);
687 READ_BUF(lock->lk_new_owner.len);
688 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
690 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
694 lock->lk_old_lock_seqid = be32_to_cpup(p++);
701 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
706 lockt->lt_type = be32_to_cpup(p++);
707 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
709 p = xdr_decode_hyper(p, &lockt->lt_offset);
710 p = xdr_decode_hyper(p, &lockt->lt_length);
711 COPYMEM(&lockt->lt_clientid, 8);
712 lockt->lt_owner.len = be32_to_cpup(p++);
713 READ_BUF(lockt->lt_owner.len);
714 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
720 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
725 locku->lu_type = be32_to_cpup(p++);
726 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
728 locku->lu_seqid = be32_to_cpup(p++);
729 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
733 p = xdr_decode_hyper(p, &locku->lu_offset);
734 p = xdr_decode_hyper(p, &locku->lu_length);
740 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
745 lookup->lo_len = be32_to_cpup(p++);
746 READ_BUF(lookup->lo_len);
747 SAVEMEM(lookup->lo_name, lookup->lo_len);
748 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
754 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
760 w = be32_to_cpup(p++);
761 *share_access = w & NFS4_SHARE_ACCESS_MASK;
762 *deleg_want = w & NFS4_SHARE_WANT_MASK;
764 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
766 switch (w & NFS4_SHARE_ACCESS_MASK) {
767 case NFS4_SHARE_ACCESS_READ:
768 case NFS4_SHARE_ACCESS_WRITE:
769 case NFS4_SHARE_ACCESS_BOTH:
772 return nfserr_bad_xdr;
774 w &= ~NFS4_SHARE_ACCESS_MASK;
777 if (!argp->minorversion)
778 return nfserr_bad_xdr;
779 switch (w & NFS4_SHARE_WANT_MASK) {
780 case NFS4_SHARE_WANT_NO_PREFERENCE:
781 case NFS4_SHARE_WANT_READ_DELEG:
782 case NFS4_SHARE_WANT_WRITE_DELEG:
783 case NFS4_SHARE_WANT_ANY_DELEG:
784 case NFS4_SHARE_WANT_NO_DELEG:
785 case NFS4_SHARE_WANT_CANCEL:
788 return nfserr_bad_xdr;
790 w &= ~NFS4_SHARE_WANT_MASK;
794 if (!deleg_when) /* open_downgrade */
797 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
798 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
799 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
800 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
804 return nfserr_bad_xdr;
807 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
812 *x = be32_to_cpup(p++);
813 /* Note: unlinke access bits, deny bits may be zero. */
814 if (*x & ~NFS4_SHARE_DENY_BOTH)
815 return nfserr_bad_xdr;
818 return nfserr_bad_xdr;
821 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
826 o->len = be32_to_cpup(p++);
828 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
829 return nfserr_bad_xdr;
832 SAVEMEM(o->data, o->len);
835 return nfserr_bad_xdr;
839 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
844 memset(open->op_bmval, 0, sizeof(open->op_bmval));
845 open->op_iattr.ia_valid = 0;
846 open->op_openowner = NULL;
848 open->op_xdr_error = 0;
849 /* seqid, share_access, share_deny, clientid, ownerlen */
851 open->op_seqid = be32_to_cpup(p++);
852 /* decode, yet ignore deleg_when until supported */
853 status = nfsd4_decode_share_access(argp, &open->op_share_access,
854 &open->op_deleg_want, &dummy);
857 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
860 READ_BUF(sizeof(clientid_t));
861 COPYMEM(&open->op_clientid, sizeof(clientid_t));
862 status = nfsd4_decode_opaque(argp, &open->op_owner);
866 open->op_create = be32_to_cpup(p++);
867 switch (open->op_create) {
868 case NFS4_OPEN_NOCREATE:
870 case NFS4_OPEN_CREATE:
872 open->op_createmode = be32_to_cpup(p++);
873 switch (open->op_createmode) {
874 case NFS4_CREATE_UNCHECKED:
875 case NFS4_CREATE_GUARDED:
876 status = nfsd4_decode_fattr(argp, open->op_bmval,
877 &open->op_iattr, &open->op_acl, &open->op_label);
881 case NFS4_CREATE_EXCLUSIVE:
882 READ_BUF(NFS4_VERIFIER_SIZE);
883 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
885 case NFS4_CREATE_EXCLUSIVE4_1:
886 if (argp->minorversion < 1)
888 READ_BUF(NFS4_VERIFIER_SIZE);
889 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
890 status = nfsd4_decode_fattr(argp, open->op_bmval,
891 &open->op_iattr, &open->op_acl, &open->op_label);
905 open->op_claim_type = be32_to_cpup(p++);
906 switch (open->op_claim_type) {
907 case NFS4_OPEN_CLAIM_NULL:
908 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
910 open->op_fname.len = be32_to_cpup(p++);
911 READ_BUF(open->op_fname.len);
912 SAVEMEM(open->op_fname.data, open->op_fname.len);
913 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
916 case NFS4_OPEN_CLAIM_PREVIOUS:
918 open->op_delegate_type = be32_to_cpup(p++);
920 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
921 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
925 open->op_fname.len = be32_to_cpup(p++);
926 READ_BUF(open->op_fname.len);
927 SAVEMEM(open->op_fname.data, open->op_fname.len);
928 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
931 case NFS4_OPEN_CLAIM_FH:
932 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
933 if (argp->minorversion < 1)
937 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
938 if (argp->minorversion < 1)
940 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
952 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
956 if (argp->minorversion >= 1)
957 return nfserr_notsupp;
959 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
963 open_conf->oc_seqid = be32_to_cpup(p++);
969 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
973 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
977 open_down->od_seqid = be32_to_cpup(p++);
978 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
979 &open_down->od_deleg_want, NULL);
982 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
989 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
994 putfh->pf_fhlen = be32_to_cpup(p++);
995 if (putfh->pf_fhlen > NFS4_FHSIZE)
997 READ_BUF(putfh->pf_fhlen);
998 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1004 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1006 if (argp->minorversion == 0)
1008 return nfserr_notsupp;
1012 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1016 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1020 p = xdr_decode_hyper(p, &read->rd_offset);
1021 read->rd_length = be32_to_cpup(p++);
1027 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1032 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1033 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1034 readdir->rd_dircount = be32_to_cpup(p++);
1035 readdir->rd_maxcount = be32_to_cpup(p++);
1036 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1043 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1048 remove->rm_namelen = be32_to_cpup(p++);
1049 READ_BUF(remove->rm_namelen);
1050 SAVEMEM(remove->rm_name, remove->rm_namelen);
1051 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1058 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1063 rename->rn_snamelen = be32_to_cpup(p++);
1064 READ_BUF(rename->rn_snamelen + 4);
1065 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1066 rename->rn_tnamelen = be32_to_cpup(p++);
1067 READ_BUF(rename->rn_tnamelen);
1068 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1069 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1071 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1078 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1082 if (argp->minorversion >= 1)
1083 return nfserr_notsupp;
1085 READ_BUF(sizeof(clientid_t));
1086 COPYMEM(clientid, sizeof(clientid_t));
1092 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1093 struct nfsd4_secinfo *secinfo)
1098 secinfo->si_namelen = be32_to_cpup(p++);
1099 READ_BUF(secinfo->si_namelen);
1100 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1101 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1108 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1109 struct nfsd4_secinfo_no_name *sin)
1114 sin->sin_style = be32_to_cpup(p++);
1119 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1123 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1126 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1127 &setattr->sa_acl, &setattr->sa_label);
1131 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1135 if (argp->minorversion >= 1)
1136 return nfserr_notsupp;
1138 READ_BUF(NFS4_VERIFIER_SIZE);
1139 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1141 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1143 return nfserr_bad_xdr;
1145 setclientid->se_callback_prog = be32_to_cpup(p++);
1146 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1148 READ_BUF(setclientid->se_callback_netid_len + 4);
1149 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1150 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1152 READ_BUF(setclientid->se_callback_addr_len + 4);
1153 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1154 setclientid->se_callback_ident = be32_to_cpup(p++);
1160 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1164 if (argp->minorversion >= 1)
1165 return nfserr_notsupp;
1167 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1168 COPYMEM(&scd_c->sc_clientid, 8);
1169 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1174 /* Also used for NVERIFY */
1176 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1180 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1183 /* For convenience's sake, we compare raw xdr'd attributes in
1184 * nfsd4_proc_verify */
1187 verify->ve_attrlen = be32_to_cpup(p++);
1188 READ_BUF(verify->ve_attrlen);
1189 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1195 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1201 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1205 p = xdr_decode_hyper(p, &write->wr_offset);
1206 write->wr_stable_how = be32_to_cpup(p++);
1207 if (write->wr_stable_how > 2)
1209 write->wr_buflen = be32_to_cpup(p++);
1211 /* Sorry .. no magic macros for this.. *
1212 * READ_BUF(write->wr_buflen);
1213 * SAVEMEM(write->wr_buf, write->wr_buflen);
1215 avail = (char*)argp->end - (char*)argp->p;
1216 if (avail + argp->pagelen < write->wr_buflen) {
1217 dprintk("NFSD: xdr error (%s:%d)\n",
1218 __FILE__, __LINE__);
1221 write->wr_head.iov_base = p;
1222 write->wr_head.iov_len = avail;
1223 write->wr_pagelist = argp->pagelist;
1225 len = XDR_QUADLEN(write->wr_buflen) << 2;
1231 pages = len >> PAGE_SHIFT;
1232 argp->pagelist += pages;
1233 argp->pagelen -= pages * PAGE_SIZE;
1234 len -= pages * PAGE_SIZE;
1236 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1238 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1240 argp->p += XDR_QUADLEN(len);
1246 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1250 if (argp->minorversion >= 1)
1251 return nfserr_notsupp;
1254 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1255 rlockowner->rl_owner.len = be32_to_cpup(p++);
1256 READ_BUF(rlockowner->rl_owner.len);
1257 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1259 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1260 return nfserr_inval;
1265 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1266 struct nfsd4_exchange_id *exid)
1271 READ_BUF(NFS4_VERIFIER_SIZE);
1272 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1274 status = nfsd4_decode_opaque(argp, &exid->clname);
1276 return nfserr_bad_xdr;
1279 exid->flags = be32_to_cpup(p++);
1281 /* Ignore state_protect4_a */
1283 exid->spa_how = be32_to_cpup(p++);
1284 switch (exid->spa_how) {
1288 /* spo_must_enforce */
1290 dummy = be32_to_cpup(p++);
1291 READ_BUF(dummy * 4);
1294 /* spo_must_allow */
1296 dummy = be32_to_cpup(p++);
1297 READ_BUF(dummy * 4);
1303 dummy = be32_to_cpup(p++);
1304 READ_BUF(dummy * 4);
1308 dummy = be32_to_cpup(p++);
1309 READ_BUF(dummy * 4);
1312 /* ssp_hash_algs<> */
1314 tmp = be32_to_cpup(p++);
1317 dummy = be32_to_cpup(p++);
1319 p += XDR_QUADLEN(dummy);
1322 /* ssp_encr_algs<> */
1324 tmp = be32_to_cpup(p++);
1327 dummy = be32_to_cpup(p++);
1329 p += XDR_QUADLEN(dummy);
1332 /* ssp_window and ssp_num_gss_handles */
1334 dummy = be32_to_cpup(p++);
1335 dummy = be32_to_cpup(p++);
1341 /* Ignore Implementation ID */
1342 READ_BUF(4); /* nfs_impl_id4 array length */
1343 dummy = be32_to_cpup(p++);
1351 dummy = be32_to_cpup(p++);
1353 p += XDR_QUADLEN(dummy);
1357 dummy = be32_to_cpup(p++);
1359 p += XDR_QUADLEN(dummy);
1369 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1370 struct nfsd4_create_session *sess)
1376 COPYMEM(&sess->clientid, 8);
1377 sess->seqid = be32_to_cpup(p++);
1378 sess->flags = be32_to_cpup(p++);
1380 /* Fore channel attrs */
1382 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1383 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1384 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1385 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1386 sess->fore_channel.maxops = be32_to_cpup(p++);
1387 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1388 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1389 if (sess->fore_channel.nr_rdma_attrs == 1) {
1391 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1392 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1393 dprintk("Too many fore channel attr bitmaps!\n");
1397 /* Back channel attrs */
1399 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1400 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1401 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1402 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1403 sess->back_channel.maxops = be32_to_cpup(p++);
1404 sess->back_channel.maxreqs = be32_to_cpup(p++);
1405 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1406 if (sess->back_channel.nr_rdma_attrs == 1) {
1408 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1409 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1410 dprintk("Too many back channel attr bitmaps!\n");
1415 sess->callback_prog = be32_to_cpup(p++);
1416 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1421 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1422 struct nfsd4_destroy_session *destroy_session)
1425 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1426 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1432 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1433 struct nfsd4_free_stateid *free_stateid)
1437 READ_BUF(sizeof(stateid_t));
1438 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1439 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1445 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1446 struct nfsd4_sequence *seq)
1450 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1451 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1452 seq->seqid = be32_to_cpup(p++);
1453 seq->slotid = be32_to_cpup(p++);
1454 seq->maxslots = be32_to_cpup(p++);
1455 seq->cachethis = be32_to_cpup(p++);
1461 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1465 struct nfsd4_test_stateid_id *stateid;
1468 test_stateid->ts_num_ids = ntohl(*p++);
1470 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1472 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1473 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1475 status = nfserrno(-ENOMEM);
1479 INIT_LIST_HEAD(&stateid->ts_id_list);
1480 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1482 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1491 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1492 status = nfserr_bad_xdr;
1496 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1501 COPYMEM(&dc->clientid, 8);
1506 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1511 rc->rca_one_fs = be32_to_cpup(p++);
1517 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1521 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1526 p = xdr_decode_hyper(p, &seek->seek_offset);
1527 seek->seek_whence = be32_to_cpup(p);
1533 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1539 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1541 return nfserr_notsupp;
1544 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1546 static nfsd4_dec nfsd4_dec_ops[] = {
1547 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1548 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1549 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1550 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1551 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1552 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1553 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1554 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1555 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1556 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1557 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1558 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1559 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1560 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1561 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1562 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1563 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1564 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1565 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1566 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1567 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1568 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1569 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1570 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1571 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1572 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1573 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1574 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1575 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1576 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1577 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1578 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1579 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1580 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1581 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1582 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1583 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1585 /* new operations for NFSv4.1 */
1586 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1587 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1588 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1589 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1590 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1591 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1592 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1593 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1594 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1595 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1596 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1597 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1598 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1599 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1600 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1601 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1602 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1603 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1604 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1606 /* new operations for NFSv4.2 */
1607 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
1608 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1609 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1610 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp,
1611 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1612 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1613 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1614 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1615 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1616 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1617 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1618 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1622 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1624 if (op->opnum < FIRST_NFS4_OP)
1626 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1628 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1630 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1636 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1639 struct nfsd4_op *op;
1640 bool cachethis = false;
1641 int auth_slack= argp->rqstp->rq_auth_slack;
1642 int max_reply = auth_slack + 8; /* opcnt, status */
1648 argp->taglen = be32_to_cpup(p++);
1649 READ_BUF(argp->taglen + 8);
1650 SAVEMEM(argp->tag, argp->taglen);
1651 argp->minorversion = be32_to_cpup(p++);
1652 argp->opcnt = be32_to_cpup(p++);
1653 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1655 if (argp->taglen > NFSD4_MAX_TAGLEN)
1657 if (argp->opcnt > 100)
1660 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1661 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1663 argp->ops = argp->iops;
1664 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1669 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1672 for (i = 0; i < argp->opcnt; i++) {
1677 op->opnum = be32_to_cpup(p++);
1679 if (nfsd4_opnum_in_range(argp, op))
1680 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1682 op->opnum = OP_ILLEGAL;
1683 op->status = nfserr_op_illegal;
1686 * We'll try to cache the result in the DRC if any one
1687 * op in the compound wants to be cached:
1689 cachethis |= nfsd4_cache_this_op(op);
1691 if (op->opnum == OP_READ) {
1693 readbytes += nfsd4_max_reply(argp->rqstp, op);
1695 max_reply += nfsd4_max_reply(argp->rqstp, op);
1697 * OP_LOCK may return a conflicting lock. (Special case
1698 * because it will just skip encoding this if it runs
1699 * out of xdr buffer space, and it is the only operation
1700 * that behaves this way.)
1702 if (op->opnum == OP_LOCK)
1703 max_reply += NFS4_OPAQUE_LIMIT;
1710 /* Sessions make the DRC unnecessary: */
1711 if (argp->minorversion)
1713 svc_reserve(argp->rqstp, max_reply + readbytes);
1714 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1716 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1717 argp->rqstp->rq_splice_ok = false;
1722 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1724 if (IS_I_VERSION(inode)) {
1725 p = xdr_encode_hyper(p, inode->i_version);
1727 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1728 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1733 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1735 *p++ = cpu_to_be32(c->atomic);
1736 if (c->change_supported) {
1737 p = xdr_encode_hyper(p, c->before_change);
1738 p = xdr_encode_hyper(p, c->after_change);
1740 *p++ = cpu_to_be32(c->before_ctime_sec);
1741 *p++ = cpu_to_be32(c->before_ctime_nsec);
1742 *p++ = cpu_to_be32(c->after_ctime_sec);
1743 *p++ = cpu_to_be32(c->after_ctime_nsec);
1748 /* Encode as an array of strings the string given with components
1749 * separated @sep, escaped with esc_enter and esc_exit.
1751 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1752 char *components, char esc_enter,
1758 int strlen, count=0;
1759 char *str, *end, *next;
1761 dprintk("nfsd4_encode_components(%s)\n", components);
1763 pathlen_offset = xdr->buf->len;
1764 p = xdr_reserve_space(xdr, 4);
1766 return nfserr_resource;
1767 p++; /* We will fill this in with @count later */
1769 end = str = components;
1771 bool found_esc = false;
1773 /* try to parse as esc_start, ..., esc_end, sep */
1774 if (*str == esc_enter) {
1775 for (; *end && (*end != esc_exit); end++)
1776 /* find esc_exit or end of string */;
1778 if (*end && (!*next || *next == sep)) {
1785 for (; *end && (*end != sep); end++)
1786 /* find sep or end of string */;
1790 p = xdr_reserve_space(xdr, strlen + 4);
1792 return nfserr_resource;
1793 p = xdr_encode_opaque(p, str, strlen);
1800 pathlen = htonl(xdr->buf->len - pathlen_offset);
1801 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1805 /* Encode as an array of strings the string given with components
1808 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1811 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
1815 * encode a location element of a fs_locations structure
1817 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1818 struct nfsd4_fs_location *location)
1822 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
1826 status = nfsd4_encode_components(xdr, '/', location->path);
1833 * Encode a path in RFC3530 'pathname4' format
1835 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1836 const struct path *root,
1837 const struct path *path)
1839 struct path cur = *path;
1841 struct dentry **components = NULL;
1842 unsigned int ncomponents = 0;
1843 __be32 err = nfserr_jukebox;
1845 dprintk("nfsd4_encode_components(");
1848 /* First walk the path up to the nfsd root, and store the
1849 * dentries/path components in an array.
1852 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1854 if (cur.dentry == cur.mnt->mnt_root) {
1855 if (follow_up(&cur))
1859 if ((ncomponents & 15) == 0) {
1860 struct dentry **new;
1861 new = krealloc(components,
1862 sizeof(*new) * (ncomponents + 16),
1868 components[ncomponents++] = cur.dentry;
1869 cur.dentry = dget_parent(cur.dentry);
1871 err = nfserr_resource;
1872 p = xdr_reserve_space(xdr, 4);
1875 *p++ = cpu_to_be32(ncomponents);
1877 while (ncomponents) {
1878 struct dentry *dentry = components[ncomponents - 1];
1881 spin_lock(&dentry->d_lock);
1882 len = dentry->d_name.len;
1883 p = xdr_reserve_space(xdr, len + 4);
1885 spin_unlock(&dentry->d_lock);
1888 p = xdr_encode_opaque(p, dentry->d_name.name, len);
1889 dprintk("/%s", dentry->d_name.name);
1890 spin_unlock(&dentry->d_lock);
1899 dput(components[--ncomponents]);
1905 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1906 struct svc_rqst *rqstp, const struct path *path)
1908 struct svc_export *exp_ps;
1911 exp_ps = rqst_find_fsidzero_export(rqstp);
1913 return nfserrno(PTR_ERR(exp_ps));
1914 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
1920 * encode a fs_locations structure
1922 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1923 struct svc_rqst *rqstp, struct svc_export *exp)
1928 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1930 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
1933 p = xdr_reserve_space(xdr, 4);
1935 return nfserr_resource;
1936 *p++ = cpu_to_be32(fslocs->locations_count);
1937 for (i=0; i<fslocs->locations_count; i++) {
1938 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
1945 static u32 nfs4_file_type(umode_t mode)
1947 switch (mode & S_IFMT) {
1948 case S_IFIFO: return NF4FIFO;
1949 case S_IFCHR: return NF4CHR;
1950 case S_IFDIR: return NF4DIR;
1951 case S_IFBLK: return NF4BLK;
1952 case S_IFLNK: return NF4LNK;
1953 case S_IFREG: return NF4REG;
1954 case S_IFSOCK: return NF4SOCK;
1955 default: return NF4BAD;
1959 static inline __be32
1960 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1961 struct nfs4_ace *ace)
1963 if (ace->whotype != NFS4_ACL_WHO_NAMED)
1964 return nfs4_acl_write_who(xdr, ace->whotype);
1965 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1966 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
1968 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1971 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1972 FATTR4_WORD0_RDATTR_ERROR)
1973 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1975 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1976 static inline __be32
1977 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1978 void *context, int len)
1982 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1984 return nfserr_resource;
1987 * For now we use a 0 here to indicate the null translation; in
1988 * the future we may place a call to translation code here.
1990 *p++ = cpu_to_be32(0); /* lfs */
1991 *p++ = cpu_to_be32(0); /* pi */
1992 p = xdr_encode_opaque(p, context, len);
1996 static inline __be32
1997 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1998 void *context, int len)
2002 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2004 /* As per referral draft: */
2005 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2006 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2007 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2008 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2009 *rdattr_err = NFSERR_MOVED;
2011 return nfserr_moved;
2013 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2014 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2019 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2021 struct path path = exp->ex_path;
2025 while (follow_up(&path)) {
2026 if (path.dentry != path.mnt->mnt_root)
2029 err = vfs_getattr(&path, stat);
2035 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2039 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2040 struct svc_export *exp,
2041 struct dentry *dentry, u32 *bmval,
2042 struct svc_rqst *rqstp, int ignore_crossmnt)
2044 u32 bmval0 = bmval[0];
2045 u32 bmval1 = bmval[1];
2046 u32 bmval2 = bmval[2];
2048 struct svc_fh *tempfh = NULL;
2049 struct kstatfs statfs;
2051 int starting_len = xdr->buf->len;
2060 struct nfs4_acl *acl = NULL;
2061 void *context = NULL;
2063 bool contextsupport = false;
2064 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2065 u32 minorversion = resp->cstate.minorversion;
2066 struct path path = {
2067 .mnt = exp->ex_path.mnt,
2070 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2072 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2073 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2074 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2075 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2077 if (exp->ex_fslocs.migrated) {
2079 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2084 err = vfs_getattr(&path, &stat);
2087 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2088 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2089 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2090 FATTR4_WORD1_SPACE_TOTAL))) {
2091 err = vfs_statfs(&path, &statfs);
2095 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2096 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2097 status = nfserr_jukebox;
2100 fh_init(tempfh, NFS4_FHSIZE);
2101 status = fh_compose(tempfh, exp, dentry, NULL);
2106 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2107 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2108 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2109 aclsupport = (err == 0);
2110 if (bmval0 & FATTR4_WORD0_ACL) {
2111 if (err == -EOPNOTSUPP)
2112 bmval0 &= ~FATTR4_WORD0_ACL;
2113 else if (err == -EINVAL) {
2114 status = nfserr_attrnotsupp;
2116 } else if (err != 0)
2121 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2122 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2123 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2124 err = security_inode_getsecctx(dentry->d_inode,
2125 &context, &contextlen);
2126 contextsupport = (err == 0);
2127 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2128 if (err == -EOPNOTSUPP)
2129 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2134 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2137 p = xdr_reserve_space(xdr, 16);
2140 *p++ = cpu_to_be32(3);
2141 *p++ = cpu_to_be32(bmval0);
2142 *p++ = cpu_to_be32(bmval1);
2143 *p++ = cpu_to_be32(bmval2);
2144 } else if (bmval1) {
2145 p = xdr_reserve_space(xdr, 12);
2148 *p++ = cpu_to_be32(2);
2149 *p++ = cpu_to_be32(bmval0);
2150 *p++ = cpu_to_be32(bmval1);
2152 p = xdr_reserve_space(xdr, 8);
2155 *p++ = cpu_to_be32(1);
2156 *p++ = cpu_to_be32(bmval0);
2159 attrlen_offset = xdr->buf->len;
2160 p = xdr_reserve_space(xdr, 4);
2163 p++; /* to be backfilled later */
2165 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2166 u32 word0 = nfsd_suppattrs0(minorversion);
2167 u32 word1 = nfsd_suppattrs1(minorversion);
2168 u32 word2 = nfsd_suppattrs2(minorversion);
2171 word0 &= ~FATTR4_WORD0_ACL;
2172 if (!contextsupport)
2173 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2175 p = xdr_reserve_space(xdr, 12);
2178 *p++ = cpu_to_be32(2);
2179 *p++ = cpu_to_be32(word0);
2180 *p++ = cpu_to_be32(word1);
2182 p = xdr_reserve_space(xdr, 16);
2185 *p++ = cpu_to_be32(3);
2186 *p++ = cpu_to_be32(word0);
2187 *p++ = cpu_to_be32(word1);
2188 *p++ = cpu_to_be32(word2);
2191 if (bmval0 & FATTR4_WORD0_TYPE) {
2192 p = xdr_reserve_space(xdr, 4);
2195 dummy = nfs4_file_type(stat.mode);
2196 if (dummy == NF4BAD) {
2197 status = nfserr_serverfault;
2200 *p++ = cpu_to_be32(dummy);
2202 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2203 p = xdr_reserve_space(xdr, 4);
2206 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2207 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2209 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2210 NFS4_FH_VOL_RENAME);
2212 if (bmval0 & FATTR4_WORD0_CHANGE) {
2213 p = xdr_reserve_space(xdr, 8);
2216 p = encode_change(p, &stat, dentry->d_inode);
2218 if (bmval0 & FATTR4_WORD0_SIZE) {
2219 p = xdr_reserve_space(xdr, 8);
2222 p = xdr_encode_hyper(p, stat.size);
2224 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2225 p = xdr_reserve_space(xdr, 4);
2228 *p++ = cpu_to_be32(1);
2230 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2231 p = xdr_reserve_space(xdr, 4);
2234 *p++ = cpu_to_be32(1);
2236 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2237 p = xdr_reserve_space(xdr, 4);
2240 *p++ = cpu_to_be32(0);
2242 if (bmval0 & FATTR4_WORD0_FSID) {
2243 p = xdr_reserve_space(xdr, 16);
2246 if (exp->ex_fslocs.migrated) {
2247 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2248 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2249 } else switch(fsid_source(fhp)) {
2250 case FSIDSOURCE_FSID:
2251 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2252 p = xdr_encode_hyper(p, (u64)0);
2254 case FSIDSOURCE_DEV:
2255 *p++ = cpu_to_be32(0);
2256 *p++ = cpu_to_be32(MAJOR(stat.dev));
2257 *p++ = cpu_to_be32(0);
2258 *p++ = cpu_to_be32(MINOR(stat.dev));
2260 case FSIDSOURCE_UUID:
2261 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2266 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2267 p = xdr_reserve_space(xdr, 4);
2270 *p++ = cpu_to_be32(0);
2272 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2273 p = xdr_reserve_space(xdr, 4);
2276 *p++ = cpu_to_be32(nn->nfsd4_lease);
2278 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2279 p = xdr_reserve_space(xdr, 4);
2282 *p++ = cpu_to_be32(rdattr_err);
2284 if (bmval0 & FATTR4_WORD0_ACL) {
2285 struct nfs4_ace *ace;
2288 p = xdr_reserve_space(xdr, 4);
2292 *p++ = cpu_to_be32(0);
2295 p = xdr_reserve_space(xdr, 4);
2298 *p++ = cpu_to_be32(acl->naces);
2300 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2301 p = xdr_reserve_space(xdr, 4*3);
2304 *p++ = cpu_to_be32(ace->type);
2305 *p++ = cpu_to_be32(ace->flag);
2306 *p++ = cpu_to_be32(ace->access_mask &
2308 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2314 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2315 p = xdr_reserve_space(xdr, 4);
2318 *p++ = cpu_to_be32(aclsupport ?
2319 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2321 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2322 p = xdr_reserve_space(xdr, 4);
2325 *p++ = cpu_to_be32(1);
2327 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2328 p = xdr_reserve_space(xdr, 4);
2331 *p++ = cpu_to_be32(0);
2333 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2334 p = xdr_reserve_space(xdr, 4);
2337 *p++ = cpu_to_be32(1);
2339 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2340 p = xdr_reserve_space(xdr, 4);
2343 *p++ = cpu_to_be32(1);
2345 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2346 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2349 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2350 fhp->fh_handle.fh_size);
2352 if (bmval0 & FATTR4_WORD0_FILEID) {
2353 p = xdr_reserve_space(xdr, 8);
2356 p = xdr_encode_hyper(p, stat.ino);
2358 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2359 p = xdr_reserve_space(xdr, 8);
2362 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2364 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2365 p = xdr_reserve_space(xdr, 8);
2368 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2370 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2371 p = xdr_reserve_space(xdr, 8);
2374 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2376 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2377 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2381 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2382 p = xdr_reserve_space(xdr, 4);
2385 *p++ = cpu_to_be32(1);
2387 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2388 p = xdr_reserve_space(xdr, 8);
2391 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2393 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2394 p = xdr_reserve_space(xdr, 4);
2397 *p++ = cpu_to_be32(255);
2399 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2400 p = xdr_reserve_space(xdr, 4);
2403 *p++ = cpu_to_be32(statfs.f_namelen);
2405 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2406 p = xdr_reserve_space(xdr, 8);
2409 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2411 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2412 p = xdr_reserve_space(xdr, 8);
2415 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2417 if (bmval1 & FATTR4_WORD1_MODE) {
2418 p = xdr_reserve_space(xdr, 4);
2421 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2423 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2424 p = xdr_reserve_space(xdr, 4);
2427 *p++ = cpu_to_be32(1);
2429 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2430 p = xdr_reserve_space(xdr, 4);
2433 *p++ = cpu_to_be32(stat.nlink);
2435 if (bmval1 & FATTR4_WORD1_OWNER) {
2436 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2440 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2441 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2445 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2446 p = xdr_reserve_space(xdr, 8);
2449 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2450 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2452 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2453 p = xdr_reserve_space(xdr, 8);
2456 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2457 p = xdr_encode_hyper(p, dummy64);
2459 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2460 p = xdr_reserve_space(xdr, 8);
2463 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2464 p = xdr_encode_hyper(p, dummy64);
2466 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2467 p = xdr_reserve_space(xdr, 8);
2470 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2471 p = xdr_encode_hyper(p, dummy64);
2473 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2474 p = xdr_reserve_space(xdr, 8);
2477 dummy64 = (u64)stat.blocks << 9;
2478 p = xdr_encode_hyper(p, dummy64);
2480 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2481 p = xdr_reserve_space(xdr, 12);
2484 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2485 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2487 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2488 p = xdr_reserve_space(xdr, 12);
2491 *p++ = cpu_to_be32(0);
2492 *p++ = cpu_to_be32(1);
2493 *p++ = cpu_to_be32(0);
2495 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2496 p = xdr_reserve_space(xdr, 12);
2499 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2500 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2502 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2503 p = xdr_reserve_space(xdr, 12);
2506 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2507 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2509 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2510 p = xdr_reserve_space(xdr, 8);
2514 * Get parent's attributes if not ignoring crossmount
2515 * and this is the root of a cross-mounted filesystem.
2517 if (ignore_crossmnt == 0 &&
2518 dentry == exp->ex_path.mnt->mnt_root)
2519 get_parent_attributes(exp, &stat);
2520 p = xdr_encode_hyper(p, stat.ino);
2522 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2523 status = nfsd4_encode_security_label(xdr, rqstp, context,
2528 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2529 p = xdr_reserve_space(xdr, 16);
2532 *p++ = cpu_to_be32(3);
2533 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2534 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2535 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2538 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2539 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2543 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2545 security_release_secctx(context, contextlen);
2546 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2553 xdr_truncate_encode(xdr, starting_len);
2556 status = nfserrno(err);
2559 status = nfserr_resource;
2563 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2564 struct xdr_buf *buf, __be32 *p, int bytes)
2566 xdr->scratch.iov_len = 0;
2567 memset(buf, 0, sizeof(struct xdr_buf));
2568 buf->head[0].iov_base = p;
2569 buf->head[0].iov_len = 0;
2572 xdr->iov = buf->head;
2574 xdr->end = (void *)p + bytes;
2575 buf->buflen = bytes;
2578 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2579 struct svc_fh *fhp, struct svc_export *exp,
2580 struct dentry *dentry, u32 *bmval,
2581 struct svc_rqst *rqstp, int ignore_crossmnt)
2583 struct xdr_buf dummy;
2584 struct xdr_stream xdr;
2587 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2588 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2594 static inline int attributes_need_mount(u32 *bmval)
2596 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2598 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2604 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2605 const char *name, int namlen)
2607 struct svc_export *exp = cd->rd_fhp->fh_export;
2608 struct dentry *dentry;
2610 int ignore_crossmnt = 0;
2612 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2614 return nfserrno(PTR_ERR(dentry));
2615 if (!dentry->d_inode) {
2617 * nfsd_buffered_readdir drops the i_mutex between
2618 * readdir and calling this callback, leaving a window
2619 * where this directory entry could have gone away.
2622 return nfserr_noent;
2627 * In the case of a mountpoint, the client may be asking for
2628 * attributes that are only properties of the underlying filesystem
2629 * as opposed to the cross-mounted file system. In such a case,
2630 * we will not follow the cross mount and will fill the attribtutes
2631 * directly from the mountpoint dentry.
2633 if (nfsd_mountpoint(dentry, exp)) {
2636 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2637 && !attributes_need_mount(cd->rd_bmval)) {
2638 ignore_crossmnt = 1;
2642 * Why the heck aren't we just using nfsd_lookup??
2643 * Different "."/".." handling? Something else?
2644 * At least, add a comment here to explain....
2646 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2648 nfserr = nfserrno(err);
2651 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2657 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2658 cd->rd_rqstp, ignore_crossmnt);
2666 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2670 p = xdr_reserve_space(xdr, 20);
2674 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2675 *p++ = htonl(0); /* bmval1 */
2677 *p++ = htonl(4); /* attribute length */
2678 *p++ = nfserr; /* no htonl */
2683 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2684 loff_t offset, u64 ino, unsigned int d_type)
2686 struct readdir_cd *ccd = ccdv;
2687 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2688 struct xdr_stream *xdr = cd->xdr;
2689 int start_offset = xdr->buf->len;
2691 u32 name_and_cookie;
2693 __be32 nfserr = nfserr_toosmall;
2697 /* In nfsv4, "." and ".." never make it onto the wire.. */
2698 if (name && isdotent(name, namlen)) {
2699 cd->common.err = nfs_ok;
2703 if (cd->cookie_offset) {
2704 wire_offset = cpu_to_be64(offset);
2705 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2709 p = xdr_reserve_space(xdr, 4);
2712 *p++ = xdr_one; /* mark entry present */
2713 cookie_offset = xdr->buf->len;
2714 p = xdr_reserve_space(xdr, 3*4 + namlen);
2717 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2718 p = xdr_encode_array(p, name, namlen); /* name length & name */
2720 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2724 case nfserr_resource:
2725 nfserr = nfserr_toosmall;
2728 xdr_truncate_encode(xdr, start_offset);
2732 * If the client requested the RDATTR_ERROR attribute,
2733 * we stuff the error code into this attribute
2734 * and continue. If this attribute was not requested,
2735 * then in accordance with the spec, we fail the
2736 * entire READDIR operation(!)
2738 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2740 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2742 nfserr = nfserr_toosmall;
2746 nfserr = nfserr_toosmall;
2747 entry_bytes = xdr->buf->len - start_offset;
2748 if (entry_bytes > cd->rd_maxcount)
2750 cd->rd_maxcount -= entry_bytes;
2751 if (!cd->rd_dircount)
2754 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2755 * let's always let through the first entry, at least:
2757 name_and_cookie = 4 * XDR_QUADLEN(namlen) + 8;
2758 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
2760 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
2761 cd->cookie_offset = cookie_offset;
2763 cd->common.err = nfs_ok;
2766 xdr_truncate_encode(xdr, start_offset);
2767 cd->common.err = nfserr;
2772 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
2776 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2778 return nfserr_resource;
2779 *p++ = cpu_to_be32(sid->si_generation);
2780 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2781 sizeof(stateid_opaque_t));
2786 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2788 struct xdr_stream *xdr = &resp->xdr;
2792 p = xdr_reserve_space(xdr, 8);
2794 return nfserr_resource;
2795 *p++ = cpu_to_be32(access->ac_supported);
2796 *p++ = cpu_to_be32(access->ac_resp_access);
2801 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2803 struct xdr_stream *xdr = &resp->xdr;
2807 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2809 return nfserr_resource;
2810 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2811 NFS4_MAX_SESSIONID_LEN);
2812 *p++ = cpu_to_be32(bcts->dir);
2813 /* Sorry, we do not yet support RDMA over 4.1: */
2814 *p++ = cpu_to_be32(0);
2820 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2822 struct xdr_stream *xdr = &resp->xdr;
2825 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
2832 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2834 struct xdr_stream *xdr = &resp->xdr;
2838 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2840 return nfserr_resource;
2841 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2842 NFS4_VERIFIER_SIZE);
2848 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2850 struct xdr_stream *xdr = &resp->xdr;
2854 p = xdr_reserve_space(xdr, 32);
2856 return nfserr_resource;
2857 p = encode_cinfo(p, &create->cr_cinfo);
2858 *p++ = cpu_to_be32(2);
2859 *p++ = cpu_to_be32(create->cr_bmval[0]);
2860 *p++ = cpu_to_be32(create->cr_bmval[1]);
2866 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2868 struct svc_fh *fhp = getattr->ga_fhp;
2869 struct xdr_stream *xdr = &resp->xdr;
2874 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2881 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2883 struct xdr_stream *xdr = &resp->xdr;
2884 struct svc_fh *fhp = *fhpp;
2889 len = fhp->fh_handle.fh_size;
2890 p = xdr_reserve_space(xdr, len + 4);
2892 return nfserr_resource;
2893 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
2899 * Including all fields other than the name, a LOCK4denied structure requires
2900 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2903 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
2905 struct xdr_netobj *conf = &ld->ld_owner;
2909 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
2912 * Don't fail to return the result just because we can't
2913 * return the conflicting open:
2921 return nfserr_resource;
2923 p = xdr_encode_hyper(p, ld->ld_start);
2924 p = xdr_encode_hyper(p, ld->ld_length);
2925 *p++ = cpu_to_be32(ld->ld_type);
2927 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2928 p = xdr_encode_opaque(p, conf->data, conf->len);
2930 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2931 p = xdr_encode_hyper(p, (u64)0); /* clientid */
2932 *p++ = cpu_to_be32(0); /* length of owner name */
2934 return nfserr_denied;
2938 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2940 struct xdr_stream *xdr = &resp->xdr;
2943 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
2944 else if (nfserr == nfserr_denied)
2945 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
2951 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2953 struct xdr_stream *xdr = &resp->xdr;
2955 if (nfserr == nfserr_denied)
2956 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
2961 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2963 struct xdr_stream *xdr = &resp->xdr;
2966 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
2973 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2975 struct xdr_stream *xdr = &resp->xdr;
2979 p = xdr_reserve_space(xdr, 20);
2981 return nfserr_resource;
2982 p = encode_cinfo(p, &link->li_cinfo);
2989 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2991 struct xdr_stream *xdr = &resp->xdr;
2997 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3000 p = xdr_reserve_space(xdr, 40);
3002 return nfserr_resource;
3003 p = encode_cinfo(p, &open->op_cinfo);
3004 *p++ = cpu_to_be32(open->op_rflags);
3005 *p++ = cpu_to_be32(2);
3006 *p++ = cpu_to_be32(open->op_bmval[0]);
3007 *p++ = cpu_to_be32(open->op_bmval[1]);
3008 *p++ = cpu_to_be32(open->op_delegate_type);
3010 switch (open->op_delegate_type) {
3011 case NFS4_OPEN_DELEGATE_NONE:
3013 case NFS4_OPEN_DELEGATE_READ:
3014 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3017 p = xdr_reserve_space(xdr, 20);
3019 return nfserr_resource;
3020 *p++ = cpu_to_be32(open->op_recall);
3023 * TODO: ACE's in delegations
3025 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3026 *p++ = cpu_to_be32(0);
3027 *p++ = cpu_to_be32(0);
3028 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3030 case NFS4_OPEN_DELEGATE_WRITE:
3031 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3034 p = xdr_reserve_space(xdr, 32);
3036 return nfserr_resource;
3037 *p++ = cpu_to_be32(0);
3040 * TODO: space_limit's in delegations
3042 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3043 *p++ = cpu_to_be32(~(u32)0);
3044 *p++ = cpu_to_be32(~(u32)0);
3047 * TODO: ACE's in delegations
3049 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3050 *p++ = cpu_to_be32(0);
3051 *p++ = cpu_to_be32(0);
3052 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3054 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3055 switch (open->op_why_no_deleg) {
3056 case WND4_CONTENTION:
3058 p = xdr_reserve_space(xdr, 8);
3060 return nfserr_resource;
3061 *p++ = cpu_to_be32(open->op_why_no_deleg);
3062 /* deleg signaling not supported yet: */
3063 *p++ = cpu_to_be32(0);
3066 p = xdr_reserve_space(xdr, 4);
3068 return nfserr_resource;
3069 *p++ = cpu_to_be32(open->op_why_no_deleg);
3075 /* XXX save filehandle here */
3081 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3083 struct xdr_stream *xdr = &resp->xdr;
3086 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3092 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3094 struct xdr_stream *xdr = &resp->xdr;
3097 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3102 static __be32 nfsd4_encode_splice_read(
3103 struct nfsd4_compoundres *resp,
3104 struct nfsd4_read *read,
3105 struct file *file, unsigned long maxcount)
3107 struct xdr_stream *xdr = &resp->xdr;
3108 struct xdr_buf *buf = xdr->buf;
3112 __be32 *p = xdr->p - 2;
3114 /* Make sure there will be room for padding if needed */
3115 if (xdr->end - xdr->p < 1)
3116 return nfserr_resource;
3118 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3119 read->rd_offset, &maxcount);
3122 * nfsd_splice_actor may have already messed with the
3123 * page length; reset it so as not to confuse
3124 * xdr_truncate_encode:
3130 eof = (read->rd_offset + maxcount >=
3131 read->rd_fhp->fh_dentry->d_inode->i_size);
3133 *(p++) = htonl(eof);
3134 *(p++) = htonl(maxcount);
3136 buf->page_len = maxcount;
3137 buf->len += maxcount;
3138 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3141 /* Use rest of head for padding and remaining ops: */
3142 buf->tail[0].iov_base = xdr->p;
3143 buf->tail[0].iov_len = 0;
3144 xdr->iov = buf->tail;
3146 int pad = 4 - (maxcount&3);
3150 buf->tail[0].iov_base += maxcount&3;
3151 buf->tail[0].iov_len = pad;
3155 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3156 buf->buflen - buf->len);
3157 buf->buflen = buf->len + space_left;
3158 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3163 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3164 struct nfsd4_read *read,
3165 struct file *file, unsigned long maxcount)
3167 struct xdr_stream *xdr = &resp->xdr;
3170 int starting_len = xdr->buf->len - 8;
3182 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3183 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3185 resp->rqstp->rq_vec[v].iov_base = p;
3186 resp->rqstp->rq_vec[v].iov_len = thislen;
3191 thislen = min_t(long, len, PAGE_SIZE);
3192 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3194 resp->rqstp->rq_vec[v].iov_base = p;
3195 resp->rqstp->rq_vec[v].iov_len = thislen;
3201 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3202 read->rd_vlen, &maxcount);
3205 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3207 eof = (read->rd_offset + maxcount >=
3208 read->rd_fhp->fh_dentry->d_inode->i_size);
3211 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3212 tmp = htonl(maxcount);
3213 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3215 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3216 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3223 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3224 struct nfsd4_read *read)
3226 unsigned long maxcount;
3227 struct xdr_stream *xdr = &resp->xdr;
3228 struct file *file = read->rd_filp;
3229 int starting_len = xdr->buf->len;
3237 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3239 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3240 return nfserr_resource;
3242 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3244 return nfserr_resource;
3246 xdr_commit_encode(xdr);
3248 maxcount = svc_max_payload(resp->rqstp);
3249 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3250 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3252 if (!read->rd_filp) {
3253 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3259 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3260 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3262 err = nfsd4_encode_readv(resp, read, file, maxcount);
3265 nfsd_put_tmp_read_open(file, ra);
3269 xdr_truncate_encode(xdr, starting_len);
3274 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3279 struct xdr_stream *xdr = &resp->xdr;
3280 int length_offset = xdr->buf->len;
3286 p = xdr_reserve_space(xdr, 4);
3288 return nfserr_resource;
3289 maxcount = PAGE_SIZE;
3291 p = xdr_reserve_space(xdr, maxcount);
3293 return nfserr_resource;
3295 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3296 * if they would overflow the buffer. Is this kosher in NFSv4? If
3297 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3298 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3300 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3301 (char *)p, &maxcount);
3302 if (nfserr == nfserr_isdir)
3303 nfserr = nfserr_inval;
3305 xdr_truncate_encode(xdr, length_offset);
3309 wire_count = htonl(maxcount);
3310 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3311 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3313 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3314 &zero, 4 - (maxcount&3));
3319 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3325 struct xdr_stream *xdr = &resp->xdr;
3326 int starting_len = xdr->buf->len;
3332 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3334 return nfserr_resource;
3336 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3337 *p++ = cpu_to_be32(0);
3338 *p++ = cpu_to_be32(0);
3339 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3340 - (char *)resp->xdr.buf->head[0].iov_base;
3343 * Number of bytes left for directory entries allowing for the
3344 * final 8 bytes of the readdir and a following failed op:
3346 bytes_left = xdr->buf->buflen - xdr->buf->len
3347 - COMPOUND_ERR_SLACK_SPACE - 8;
3348 if (bytes_left < 0) {
3349 nfserr = nfserr_resource;
3352 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3354 * Note the rfc defines rd_maxcount as the size of the
3355 * READDIR4resok structure, which includes the verifier above
3356 * and the 8 bytes encoded at the end of this function:
3358 if (maxcount < 16) {
3359 nfserr = nfserr_toosmall;
3362 maxcount = min_t(int, maxcount-16, bytes_left);
3364 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3365 if (!readdir->rd_dircount)
3366 readdir->rd_dircount = INT_MAX;
3369 readdir->rd_maxcount = maxcount;
3370 readdir->common.err = 0;
3371 readdir->cookie_offset = 0;
3373 offset = readdir->rd_cookie;
3374 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3376 &readdir->common, nfsd4_encode_dirent);
3377 if (nfserr == nfs_ok &&
3378 readdir->common.err == nfserr_toosmall &&
3379 xdr->buf->len == starting_len + 8) {
3380 /* nothing encoded; which limit did we hit?: */
3381 if (maxcount - 16 < bytes_left)
3382 /* It was the fault of rd_maxcount: */
3383 nfserr = nfserr_toosmall;
3385 /* We ran out of buffer space: */
3386 nfserr = nfserr_resource;
3391 if (readdir->cookie_offset) {
3392 wire_offset = cpu_to_be64(offset);
3393 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3397 p = xdr_reserve_space(xdr, 8);
3402 *p++ = 0; /* no more entries */
3403 *p++ = htonl(readdir->common.err == nfserr_eof);
3407 xdr_truncate_encode(xdr, starting_len);
3412 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3414 struct xdr_stream *xdr = &resp->xdr;
3418 p = xdr_reserve_space(xdr, 20);
3420 return nfserr_resource;
3421 p = encode_cinfo(p, &remove->rm_cinfo);
3427 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3429 struct xdr_stream *xdr = &resp->xdr;
3433 p = xdr_reserve_space(xdr, 40);
3435 return nfserr_resource;
3436 p = encode_cinfo(p, &rename->rn_sinfo);
3437 p = encode_cinfo(p, &rename->rn_tinfo);
3443 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3444 __be32 nfserr, struct svc_export *exp)
3446 u32 i, nflavs, supported;
3447 struct exp_flavor_info *flavs;
3448 struct exp_flavor_info def_flavs[2];
3449 __be32 *p, *flavorsp;
3450 static bool report = true;
3454 nfserr = nfserr_resource;
3455 if (exp->ex_nflavors) {
3456 flavs = exp->ex_flavors;
3457 nflavs = exp->ex_nflavors;
3458 } else { /* Handling of some defaults in absence of real secinfo: */
3460 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3462 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3463 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3464 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3466 flavs[0].pseudoflavor
3467 = svcauth_gss_flavor(exp->ex_client);
3470 flavs[0].pseudoflavor
3471 = exp->ex_client->flavour->flavour;
3476 p = xdr_reserve_space(xdr, 4);
3479 flavorsp = p++; /* to be backfilled later */
3481 for (i = 0; i < nflavs; i++) {
3482 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3483 struct rpcsec_gss_info info;
3485 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3487 p = xdr_reserve_space(xdr, 4 + 4 +
3488 XDR_LEN(info.oid.len) + 4 + 4);
3491 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3492 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3493 *p++ = cpu_to_be32(info.qop);
3494 *p++ = cpu_to_be32(info.service);
3495 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3497 p = xdr_reserve_space(xdr, 4);
3500 *p++ = cpu_to_be32(pf);
3503 pr_warn("NFS: SECINFO: security flavor %u "
3504 "is not supported\n", pf);
3508 if (nflavs != supported)
3510 *flavorsp = htonl(supported);
3519 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3520 struct nfsd4_secinfo *secinfo)
3522 struct xdr_stream *xdr = &resp->xdr;
3524 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3528 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3529 struct nfsd4_secinfo_no_name *secinfo)
3531 struct xdr_stream *xdr = &resp->xdr;
3533 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3537 * The SETATTR encode routine is special -- it always encodes a bitmap,
3538 * regardless of the error status.
3541 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3543 struct xdr_stream *xdr = &resp->xdr;
3546 p = xdr_reserve_space(xdr, 16);
3548 return nfserr_resource;
3550 *p++ = cpu_to_be32(3);
3551 *p++ = cpu_to_be32(0);
3552 *p++ = cpu_to_be32(0);
3553 *p++ = cpu_to_be32(0);
3556 *p++ = cpu_to_be32(3);
3557 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3558 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3559 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3565 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3567 struct xdr_stream *xdr = &resp->xdr;
3571 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3573 return nfserr_resource;
3574 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3575 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3576 NFS4_VERIFIER_SIZE);
3578 else if (nfserr == nfserr_clid_inuse) {
3579 p = xdr_reserve_space(xdr, 8);
3581 return nfserr_resource;
3582 *p++ = cpu_to_be32(0);
3583 *p++ = cpu_to_be32(0);
3589 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3591 struct xdr_stream *xdr = &resp->xdr;
3595 p = xdr_reserve_space(xdr, 16);
3597 return nfserr_resource;
3598 *p++ = cpu_to_be32(write->wr_bytes_written);
3599 *p++ = cpu_to_be32(write->wr_how_written);
3600 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3601 NFS4_VERIFIER_SIZE);
3606 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3607 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3608 1 << (OP_EXCHANGE_ID - 32) |
3609 1 << (OP_CREATE_SESSION - 32) |
3610 1 << (OP_DESTROY_SESSION - 32) |
3611 1 << (OP_DESTROY_CLIENTID - 32)
3615 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3616 struct nfsd4_exchange_id *exid)
3618 struct xdr_stream *xdr = &resp->xdr;
3623 int server_scope_sz;
3624 uint64_t minor_id = 0;
3629 major_id = utsname()->nodename;
3630 major_id_sz = strlen(major_id);
3631 server_scope = utsname()->nodename;
3632 server_scope_sz = strlen(server_scope);
3634 p = xdr_reserve_space(xdr,
3635 8 /* eir_clientid */ +
3636 4 /* eir_sequenceid */ +
3640 return nfserr_resource;
3642 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3643 *p++ = cpu_to_be32(exid->seqid);
3644 *p++ = cpu_to_be32(exid->flags);
3646 *p++ = cpu_to_be32(exid->spa_how);
3648 switch (exid->spa_how) {
3652 /* spo_must_enforce, spo_must_allow */
3653 p = xdr_reserve_space(xdr, 16);
3655 return nfserr_resource;
3657 /* spo_must_enforce bitmap: */
3658 *p++ = cpu_to_be32(2);
3659 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3660 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3661 /* empty spo_must_allow bitmap: */
3662 *p++ = cpu_to_be32(0);
3669 p = xdr_reserve_space(xdr,
3670 8 /* so_minor_id */ +
3671 4 /* so_major_id.len */ +
3672 (XDR_QUADLEN(major_id_sz) * 4) +
3673 4 /* eir_server_scope.len */ +
3674 (XDR_QUADLEN(server_scope_sz) * 4) +
3675 4 /* eir_server_impl_id.count (0) */);
3677 return nfserr_resource;
3679 /* The server_owner struct */
3680 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3682 p = xdr_encode_opaque(p, major_id, major_id_sz);
3685 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3687 /* Implementation id */
3688 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3693 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3694 struct nfsd4_create_session *sess)
3696 struct xdr_stream *xdr = &resp->xdr;
3702 p = xdr_reserve_space(xdr, 24);
3704 return nfserr_resource;
3705 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3706 NFS4_MAX_SESSIONID_LEN);
3707 *p++ = cpu_to_be32(sess->seqid);
3708 *p++ = cpu_to_be32(sess->flags);
3710 p = xdr_reserve_space(xdr, 28);
3712 return nfserr_resource;
3713 *p++ = cpu_to_be32(0); /* headerpadsz */
3714 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3715 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3716 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3717 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3718 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3719 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3721 if (sess->fore_channel.nr_rdma_attrs) {
3722 p = xdr_reserve_space(xdr, 4);
3724 return nfserr_resource;
3725 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3728 p = xdr_reserve_space(xdr, 28);
3730 return nfserr_resource;
3731 *p++ = cpu_to_be32(0); /* headerpadsz */
3732 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3733 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3734 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3735 *p++ = cpu_to_be32(sess->back_channel.maxops);
3736 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3737 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3739 if (sess->back_channel.nr_rdma_attrs) {
3740 p = xdr_reserve_space(xdr, 4);
3742 return nfserr_resource;
3743 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
3749 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3750 struct nfsd4_sequence *seq)
3752 struct xdr_stream *xdr = &resp->xdr;
3758 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3760 return nfserr_resource;
3761 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3762 NFS4_MAX_SESSIONID_LEN);
3763 *p++ = cpu_to_be32(seq->seqid);
3764 *p++ = cpu_to_be32(seq->slotid);
3765 /* Note slotid's are numbered from zero: */
3766 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3767 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3768 *p++ = cpu_to_be32(seq->status_flags);
3770 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
3775 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3776 struct nfsd4_test_stateid *test_stateid)
3778 struct xdr_stream *xdr = &resp->xdr;
3779 struct nfsd4_test_stateid_id *stateid, *next;
3785 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3787 return nfserr_resource;
3788 *p++ = htonl(test_stateid->ts_num_ids);
3790 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3791 *p++ = stateid->ts_id_status;
3798 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
3799 struct nfsd4_seek *seek)
3806 p = xdr_reserve_space(&resp->xdr, 4 + 8);
3807 *p++ = cpu_to_be32(seek->seek_eof);
3808 p = xdr_encode_hyper(p, seek->seek_pos);
3814 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3819 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3822 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3823 * since we don't need to filter out obsolete ops as this is
3824 * done in the decoding phase.
3826 static nfsd4_enc nfsd4_enc_ops[] = {
3827 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3828 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3829 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3830 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3831 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3832 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3833 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3834 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3835 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3836 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3837 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3838 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3839 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3840 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3841 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3842 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3843 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3844 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3845 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3846 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3847 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3848 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3849 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3850 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3851 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3852 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3853 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3854 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3855 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3856 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3857 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3858 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3859 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3860 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3861 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3862 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3863 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3865 /* NFSv4.1 operations */
3866 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3867 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3868 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3869 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3870 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3871 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3872 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3873 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3874 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3875 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3876 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3877 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3878 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3879 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3880 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3881 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3882 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3883 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3884 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3886 /* NFSv4.2 operations */
3887 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
3888 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
3889 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
3890 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
3891 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
3892 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
3893 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
3894 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
3895 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
3896 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
3897 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
3898 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
3902 * Calculate whether we still have space to encode repsize bytes.
3903 * There are two considerations:
3904 * - For NFS versions >=4.1, the size of the reply must stay within
3906 * - For all NFS versions, we must stay within limited preallocated
3909 * This is called before the operation is processed, so can only provide
3910 * an upper estimate. For some nonidempotent operations (such as
3911 * getattr), it's not necessarily a problem if that estimate is wrong,
3912 * as we can fail it after processing without significant side effects.
3914 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
3916 struct xdr_buf *buf = &resp->rqstp->rq_res;
3917 struct nfsd4_slot *slot = resp->cstate.slot;
3919 if (buf->len + respsize <= buf->buflen)
3921 if (!nfsd4_has_session(&resp->cstate))
3922 return nfserr_resource;
3923 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3925 return nfserr_rep_too_big_to_cache;
3927 return nfserr_rep_too_big;
3931 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3933 struct xdr_stream *xdr = &resp->xdr;
3934 struct nfs4_stateowner *so = resp->cstate.replay_owner;
3935 struct svc_rqst *rqstp = resp->rqstp;
3936 int post_err_offset;
3940 p = xdr_reserve_space(xdr, 8);
3945 *p++ = cpu_to_be32(op->opnum);
3946 post_err_offset = xdr->buf->len;
3948 if (op->opnum == OP_ILLEGAL)
3950 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3951 !nfsd4_enc_ops[op->opnum]);
3952 encoder = nfsd4_enc_ops[op->opnum];
3953 op->status = encoder(resp, op->status, &op->u);
3954 xdr_commit_encode(xdr);
3956 /* nfsd4_check_resp_size guarantees enough room for error status */
3958 int space_needed = 0;
3959 if (!nfsd4_last_compound_op(rqstp))
3960 space_needed = COMPOUND_ERR_SLACK_SPACE;
3961 op->status = nfsd4_check_resp_size(resp, space_needed);
3963 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3964 struct nfsd4_slot *slot = resp->cstate.slot;
3966 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3967 op->status = nfserr_rep_too_big_to_cache;
3969 op->status = nfserr_rep_too_big;
3971 if (op->status == nfserr_resource ||
3972 op->status == nfserr_rep_too_big ||
3973 op->status == nfserr_rep_too_big_to_cache) {
3975 * The operation may have already been encoded or
3976 * partially encoded. No op returns anything additional
3977 * in the case of one of these three errors, so we can
3978 * just truncate back to after the status. But it's a
3979 * bug if we had to do this on a non-idempotent op:
3981 warn_on_nonidempotent_op(op);
3982 xdr_truncate_encode(xdr, post_err_offset);
3985 int len = xdr->buf->len - post_err_offset;
3987 so->so_replay.rp_status = op->status;
3988 so->so_replay.rp_buflen = len;
3989 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3990 so->so_replay.rp_buf, len);
3993 /* Note that op->status is already in network byte order: */
3994 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
3998 * Encode the reply stored in the stateowner reply cache
4000 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4001 * previously sent already encoded operation.
4004 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4007 struct nfs4_replay *rp = op->replay;
4011 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4016 *p++ = cpu_to_be32(op->opnum);
4017 *p++ = rp->rp_status; /* already xdr'ed */
4019 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4023 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4025 return xdr_ressize_check(rqstp, p);
4028 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4030 struct svc_rqst *rqstp = rq;
4031 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4033 if (args->ops != args->iops) {
4035 args->ops = args->iops;
4039 while (args->to_free) {
4040 struct svcxdr_tmpbuf *tb = args->to_free;
4041 args->to_free = tb->next;
4048 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4050 if (rqstp->rq_arg.head[0].iov_len % 4) {
4051 /* client is nuts */
4052 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4053 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4057 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4058 args->pagelist = rqstp->rq_arg.pages;
4059 args->pagelen = rqstp->rq_arg.page_len;
4061 args->to_free = NULL;
4062 args->ops = args->iops;
4063 args->rqstp = rqstp;
4065 return !nfsd4_decode_compound(args);
4069 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4072 * All that remains is to write the tag and operation count...
4074 struct xdr_buf *buf = resp->xdr.buf;
4076 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4077 buf->tail[0].iov_len);
4079 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4082 *p++ = htonl(resp->taglen);
4083 memcpy(p, resp->tag, resp->taglen);
4084 p += XDR_QUADLEN(resp->taglen);
4085 *p++ = htonl(resp->opcnt);
4087 nfsd4_sequence_done(resp);