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.
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
43 #include <linux/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/pagemap.h>
48 #include <linux/sunrpc/svcauth_gss.h>
58 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59 #include <linux/security.h>
63 #define NFSDDBG_FACILITY NFSDDBG_XDR
66 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
67 * directory in order to indicate to the client that a filesystem boundary is present
68 * We use a fixed fsid for a referral
70 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
71 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
74 check_filename(char *str, int len)
80 if (isdotent(str, len))
81 return nfserr_badname;
82 for (i = 0; i < len; i++)
84 return nfserr_badname;
96 dprintk("NFSD: xdr error (%s:%d)\n", \
97 __FILE__, __LINE__); \
98 status = nfserr_bad_xdr; \
101 #define READMEM(x,nbytes) do { \
103 p += XDR_QUADLEN(nbytes); \
105 #define SAVEMEM(x,nbytes) do { \
106 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
107 savemem(argp, p, nbytes) : \
109 dprintk("NFSD: xdr error (%s:%d)\n", \
110 __FILE__, __LINE__); \
113 p += XDR_QUADLEN(nbytes); \
115 #define COPYMEM(x,nbytes) do { \
116 memcpy((x), p, nbytes); \
117 p += XDR_QUADLEN(nbytes); \
120 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
121 #define READ_BUF(nbytes) do { \
122 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
124 argp->p += XDR_QUADLEN(nbytes); \
125 } else if (!(p = read_buf(argp, nbytes))) { \
126 dprintk("NFSD: xdr error (%s:%d)\n", \
127 __FILE__, __LINE__); \
132 static void next_decode_page(struct nfsd4_compoundargs *argp)
134 argp->p = page_address(argp->pagelist[0]);
136 if (argp->pagelen < PAGE_SIZE) {
137 argp->end = argp->p + (argp->pagelen>>2);
140 argp->end = argp->p + (PAGE_SIZE>>2);
141 argp->pagelen -= PAGE_SIZE;
145 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
147 /* We want more bytes than seem to be available.
148 * Maybe we need a new page, maybe we have just run out
150 unsigned int avail = (char *)argp->end - (char *)argp->p;
152 if (avail + argp->pagelen < nbytes)
154 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
156 /* ok, we can do it with the current plus the next page */
157 if (nbytes <= sizeof(argp->tmp))
161 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
167 * The following memcpy is safe because read_buf is always
168 * called with nbytes > avail, and the two cases above both
169 * guarantee p points to at least nbytes bytes.
171 memcpy(p, argp->p, avail);
172 next_decode_page(argp);
173 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
174 argp->p += XDR_QUADLEN(nbytes - avail);
178 static int zero_clientid(clientid_t *clid)
180 return (clid->cl_boot == 0) && (clid->cl_id == 0);
184 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
185 * @argp: NFSv4 compound argument structure
186 * @p: pointer to be freed (with kfree())
188 * Marks @p to be freed when processing the compound operation
189 * described in @argp finishes.
192 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
194 struct svcxdr_tmpbuf *tb;
196 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
199 tb->next = argp->to_free;
205 * For xdr strings that need to be passed to other kernel api's
206 * as null-terminated strings.
208 * Note null-terminating in place usually isn't safe since the
209 * buffer might end on a page boundary.
212 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
214 char *p = svcxdr_tmpalloc(argp, len + 1);
224 * savemem - duplicate a chunk of memory for later processing
225 * @argp: NFSv4 compound argument structure to be freed with
226 * @p: pointer to be duplicated
227 * @nbytes: length to be duplicated
229 * Returns a pointer to a copy of @nbytes bytes of memory at @p
230 * that are preserved until processing of the NFSv4 compound
231 * operation described by @argp finishes.
233 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
237 ret = svcxdr_tmpalloc(argp, nbytes);
240 memcpy(ret, p, nbytes);
245 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
255 bmlen = be32_to_cpup(p++);
259 READ_BUF(bmlen << 2);
261 bmval[0] = be32_to_cpup(p++);
263 bmval[1] = be32_to_cpup(p++);
265 bmval[2] = be32_to_cpup(p++);
271 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
272 struct iattr *iattr, struct nfs4_acl **acl,
273 struct xdr_netobj *label)
275 int expected_len, len = 0;
282 if ((status = nfsd4_decode_bitmap(argp, bmval)))
286 expected_len = be32_to_cpup(p++);
288 if (bmval[0] & FATTR4_WORD0_SIZE) {
291 p = xdr_decode_hyper(p, &iattr->ia_size);
292 iattr->ia_valid |= ATTR_SIZE;
294 if (bmval[0] & FATTR4_WORD0_ACL) {
296 struct nfs4_ace *ace;
298 READ_BUF(4); len += 4;
299 nace = be32_to_cpup(p++);
301 if (nace > NFS4_ACL_MAX)
304 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
306 return nfserr_jukebox;
308 (*acl)->naces = nace;
309 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
310 READ_BUF(16); len += 16;
311 ace->type = be32_to_cpup(p++);
312 ace->flag = be32_to_cpup(p++);
313 ace->access_mask = be32_to_cpup(p++);
314 dummy32 = be32_to_cpup(p++);
316 len += XDR_QUADLEN(dummy32) << 2;
317 READMEM(buf, dummy32);
318 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
320 if (ace->whotype != NFS4_ACL_WHO_NAMED)
322 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
323 status = nfsd_map_name_to_gid(argp->rqstp,
324 buf, dummy32, &ace->who_gid);
326 status = nfsd_map_name_to_uid(argp->rqstp,
327 buf, dummy32, &ace->who_uid);
333 if (bmval[1] & FATTR4_WORD1_MODE) {
336 iattr->ia_mode = be32_to_cpup(p++);
337 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
338 iattr->ia_valid |= ATTR_MODE;
340 if (bmval[1] & FATTR4_WORD1_OWNER) {
343 dummy32 = be32_to_cpup(p++);
345 len += (XDR_QUADLEN(dummy32) << 2);
346 READMEM(buf, dummy32);
347 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
349 iattr->ia_valid |= ATTR_UID;
351 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
354 dummy32 = be32_to_cpup(p++);
356 len += (XDR_QUADLEN(dummy32) << 2);
357 READMEM(buf, dummy32);
358 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
360 iattr->ia_valid |= ATTR_GID;
362 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
365 dummy32 = be32_to_cpup(p++);
367 case NFS4_SET_TO_CLIENT_TIME:
368 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
369 all 32 bits of 'nseconds'. */
372 p = xdr_decode_hyper(p, &sec);
373 iattr->ia_atime.tv_sec = (time_t)sec;
374 iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
375 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
377 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
379 case NFS4_SET_TO_SERVER_TIME:
380 iattr->ia_valid |= ATTR_ATIME;
386 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
389 dummy32 = be32_to_cpup(p++);
391 case NFS4_SET_TO_CLIENT_TIME:
392 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
393 all 32 bits of 'nseconds'. */
396 p = xdr_decode_hyper(p, &sec);
397 iattr->ia_mtime.tv_sec = sec;
398 iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
399 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
401 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
403 case NFS4_SET_TO_SERVER_TIME:
404 iattr->ia_valid |= ATTR_MTIME;
412 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
413 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
416 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
419 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
422 dummy32 = be32_to_cpup(p++);
424 if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN)
425 return nfserr_badlabel;
426 len += (XDR_QUADLEN(dummy32) << 2);
427 READMEM(buf, dummy32);
428 label->len = dummy32;
429 label->data = svcxdr_dupstr(argp, buf, dummy32);
431 return nfserr_jukebox;
435 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
436 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
437 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
438 READ_BUF(expected_len - len);
439 else if (len != expected_len)
446 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
450 READ_BUF(sizeof(stateid_t));
451 sid->si_generation = be32_to_cpup(p++);
452 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
458 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
463 access->ac_req_access = be32_to_cpup(p++);
468 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
476 /* callback_sec_params4 */
478 nr_secflavs = be32_to_cpup(p++);
480 cbs->flavor = (u32)(-1);
482 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
484 for (i = 0; i < nr_secflavs; ++i) {
486 dummy = be32_to_cpup(p++);
489 /* Nothing to read */
490 if (cbs->flavor == (u32)(-1))
491 cbs->flavor = RPC_AUTH_NULL;
496 dummy = be32_to_cpup(p++);
499 dummy = be32_to_cpup(p++);
501 SAVEMEM(machine_name, dummy);
505 uid = be32_to_cpup(p++);
506 gid = be32_to_cpup(p++);
510 dummy = be32_to_cpup(p++);
512 if (cbs->flavor == (u32)(-1)) {
513 kuid_t kuid = make_kuid(&init_user_ns, uid);
514 kgid_t kgid = make_kgid(&init_user_ns, gid);
515 if (uid_valid(kuid) && gid_valid(kgid)) {
518 cbs->flavor = RPC_AUTH_UNIX;
520 dprintk("RPC_AUTH_UNIX with invalid"
521 "uid or gid ignoring!\n");
526 dprintk("RPC_AUTH_GSS callback secflavor "
530 dummy = be32_to_cpup(p++);
531 /* gcbp_handle_from_server */
532 dummy = be32_to_cpup(p++);
534 p += XDR_QUADLEN(dummy);
535 /* gcbp_handle_from_client */
537 dummy = be32_to_cpup(p++);
541 dprintk("Illegal callback secflavor\n");
548 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
553 bc->bc_cb_program = be32_to_cpup(p++);
554 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
559 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
563 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
564 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
565 bcts->dir = be32_to_cpup(p++);
566 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
567 * could help us figure out we should be using it. */
572 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
577 close->cl_seqid = be32_to_cpup(p++);
578 return nfsd4_decode_stateid(argp, &close->cl_stateid);
585 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
590 p = xdr_decode_hyper(p, &commit->co_offset);
591 commit->co_count = be32_to_cpup(p++);
597 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
602 create->cr_type = be32_to_cpup(p++);
603 switch (create->cr_type) {
606 create->cr_datalen = be32_to_cpup(p++);
607 READ_BUF(create->cr_datalen);
608 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
609 if (!create->cr_data)
610 return nfserr_jukebox;
615 create->cr_specdata1 = be32_to_cpup(p++);
616 create->cr_specdata2 = be32_to_cpup(p++);
626 create->cr_namelen = be32_to_cpup(p++);
627 READ_BUF(create->cr_namelen);
628 SAVEMEM(create->cr_name, create->cr_namelen);
629 if ((status = check_filename(create->cr_name, create->cr_namelen)))
632 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
633 &create->cr_acl, &create->cr_label);
641 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
643 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
647 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
649 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
653 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
658 link->li_namelen = be32_to_cpup(p++);
659 READ_BUF(link->li_namelen);
660 SAVEMEM(link->li_name, link->li_namelen);
661 if ((status = check_filename(link->li_name, link->li_namelen)))
668 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
673 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
676 lock->lk_type = be32_to_cpup(p++);
677 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
679 lock->lk_reclaim = be32_to_cpup(p++);
680 p = xdr_decode_hyper(p, &lock->lk_offset);
681 p = xdr_decode_hyper(p, &lock->lk_length);
682 lock->lk_is_new = be32_to_cpup(p++);
684 if (lock->lk_is_new) {
686 lock->lk_new_open_seqid = be32_to_cpup(p++);
687 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
690 READ_BUF(8 + sizeof(clientid_t));
691 lock->lk_new_lock_seqid = be32_to_cpup(p++);
692 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
693 lock->lk_new_owner.len = be32_to_cpup(p++);
694 READ_BUF(lock->lk_new_owner.len);
695 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
697 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
701 lock->lk_old_lock_seqid = be32_to_cpup(p++);
708 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
713 lockt->lt_type = be32_to_cpup(p++);
714 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
716 p = xdr_decode_hyper(p, &lockt->lt_offset);
717 p = xdr_decode_hyper(p, &lockt->lt_length);
718 COPYMEM(&lockt->lt_clientid, 8);
719 lockt->lt_owner.len = be32_to_cpup(p++);
720 READ_BUF(lockt->lt_owner.len);
721 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
727 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
732 locku->lu_type = be32_to_cpup(p++);
733 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
735 locku->lu_seqid = be32_to_cpup(p++);
736 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
740 p = xdr_decode_hyper(p, &locku->lu_offset);
741 p = xdr_decode_hyper(p, &locku->lu_length);
747 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
752 lookup->lo_len = be32_to_cpup(p++);
753 READ_BUF(lookup->lo_len);
754 SAVEMEM(lookup->lo_name, lookup->lo_len);
755 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
761 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
767 w = be32_to_cpup(p++);
768 *share_access = w & NFS4_SHARE_ACCESS_MASK;
769 *deleg_want = w & NFS4_SHARE_WANT_MASK;
771 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
773 switch (w & NFS4_SHARE_ACCESS_MASK) {
774 case NFS4_SHARE_ACCESS_READ:
775 case NFS4_SHARE_ACCESS_WRITE:
776 case NFS4_SHARE_ACCESS_BOTH:
779 return nfserr_bad_xdr;
781 w &= ~NFS4_SHARE_ACCESS_MASK;
784 if (!argp->minorversion)
785 return nfserr_bad_xdr;
786 switch (w & NFS4_SHARE_WANT_MASK) {
787 case NFS4_SHARE_WANT_NO_PREFERENCE:
788 case NFS4_SHARE_WANT_READ_DELEG:
789 case NFS4_SHARE_WANT_WRITE_DELEG:
790 case NFS4_SHARE_WANT_ANY_DELEG:
791 case NFS4_SHARE_WANT_NO_DELEG:
792 case NFS4_SHARE_WANT_CANCEL:
795 return nfserr_bad_xdr;
797 w &= ~NFS4_SHARE_WANT_MASK;
801 if (!deleg_when) /* open_downgrade */
804 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
805 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
806 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
807 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
811 return nfserr_bad_xdr;
814 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
819 *x = be32_to_cpup(p++);
820 /* Note: unlinke access bits, deny bits may be zero. */
821 if (*x & ~NFS4_SHARE_DENY_BOTH)
822 return nfserr_bad_xdr;
825 return nfserr_bad_xdr;
828 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
833 o->len = be32_to_cpup(p++);
835 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
836 return nfserr_bad_xdr;
839 SAVEMEM(o->data, o->len);
842 return nfserr_bad_xdr;
846 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
851 memset(open->op_bmval, 0, sizeof(open->op_bmval));
852 open->op_iattr.ia_valid = 0;
853 open->op_openowner = NULL;
855 open->op_xdr_error = 0;
856 /* seqid, share_access, share_deny, clientid, ownerlen */
858 open->op_seqid = be32_to_cpup(p++);
859 /* decode, yet ignore deleg_when until supported */
860 status = nfsd4_decode_share_access(argp, &open->op_share_access,
861 &open->op_deleg_want, &dummy);
864 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
867 READ_BUF(sizeof(clientid_t));
868 COPYMEM(&open->op_clientid, sizeof(clientid_t));
869 status = nfsd4_decode_opaque(argp, &open->op_owner);
873 open->op_create = be32_to_cpup(p++);
874 switch (open->op_create) {
875 case NFS4_OPEN_NOCREATE:
877 case NFS4_OPEN_CREATE:
879 open->op_createmode = be32_to_cpup(p++);
880 switch (open->op_createmode) {
881 case NFS4_CREATE_UNCHECKED:
882 case NFS4_CREATE_GUARDED:
883 status = nfsd4_decode_fattr(argp, open->op_bmval,
884 &open->op_iattr, &open->op_acl, &open->op_label);
888 case NFS4_CREATE_EXCLUSIVE:
889 READ_BUF(NFS4_VERIFIER_SIZE);
890 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
892 case NFS4_CREATE_EXCLUSIVE4_1:
893 if (argp->minorversion < 1)
895 READ_BUF(NFS4_VERIFIER_SIZE);
896 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
897 status = nfsd4_decode_fattr(argp, open->op_bmval,
898 &open->op_iattr, &open->op_acl, &open->op_label);
912 open->op_claim_type = be32_to_cpup(p++);
913 switch (open->op_claim_type) {
914 case NFS4_OPEN_CLAIM_NULL:
915 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
917 open->op_fname.len = be32_to_cpup(p++);
918 READ_BUF(open->op_fname.len);
919 SAVEMEM(open->op_fname.data, open->op_fname.len);
920 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
923 case NFS4_OPEN_CLAIM_PREVIOUS:
925 open->op_delegate_type = be32_to_cpup(p++);
927 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
928 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
932 open->op_fname.len = be32_to_cpup(p++);
933 READ_BUF(open->op_fname.len);
934 SAVEMEM(open->op_fname.data, open->op_fname.len);
935 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
938 case NFS4_OPEN_CLAIM_FH:
939 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
940 if (argp->minorversion < 1)
944 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
945 if (argp->minorversion < 1)
947 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
959 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
963 if (argp->minorversion >= 1)
964 return nfserr_notsupp;
966 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
970 open_conf->oc_seqid = be32_to_cpup(p++);
976 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
980 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
984 open_down->od_seqid = be32_to_cpup(p++);
985 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
986 &open_down->od_deleg_want, NULL);
989 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
996 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1001 putfh->pf_fhlen = be32_to_cpup(p++);
1002 if (putfh->pf_fhlen > NFS4_FHSIZE)
1004 READ_BUF(putfh->pf_fhlen);
1005 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1011 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1013 if (argp->minorversion == 0)
1015 return nfserr_notsupp;
1019 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1023 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1027 p = xdr_decode_hyper(p, &read->rd_offset);
1028 read->rd_length = be32_to_cpup(p++);
1034 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1039 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1040 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1041 readdir->rd_dircount = be32_to_cpup(p++);
1042 readdir->rd_maxcount = be32_to_cpup(p++);
1043 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1050 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1055 remove->rm_namelen = be32_to_cpup(p++);
1056 READ_BUF(remove->rm_namelen);
1057 SAVEMEM(remove->rm_name, remove->rm_namelen);
1058 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1065 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1070 rename->rn_snamelen = be32_to_cpup(p++);
1071 READ_BUF(rename->rn_snamelen + 4);
1072 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1073 rename->rn_tnamelen = be32_to_cpup(p++);
1074 READ_BUF(rename->rn_tnamelen);
1075 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1076 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1078 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1085 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1089 if (argp->minorversion >= 1)
1090 return nfserr_notsupp;
1092 READ_BUF(sizeof(clientid_t));
1093 COPYMEM(clientid, sizeof(clientid_t));
1099 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1100 struct nfsd4_secinfo *secinfo)
1105 secinfo->si_namelen = be32_to_cpup(p++);
1106 READ_BUF(secinfo->si_namelen);
1107 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1108 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1115 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1116 struct nfsd4_secinfo_no_name *sin)
1121 sin->sin_style = be32_to_cpup(p++);
1126 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1130 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1133 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1134 &setattr->sa_acl, &setattr->sa_label);
1138 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1142 if (argp->minorversion >= 1)
1143 return nfserr_notsupp;
1145 READ_BUF(NFS4_VERIFIER_SIZE);
1146 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1148 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1150 return nfserr_bad_xdr;
1152 setclientid->se_callback_prog = be32_to_cpup(p++);
1153 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1155 READ_BUF(setclientid->se_callback_netid_len + 4);
1156 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1157 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1159 READ_BUF(setclientid->se_callback_addr_len + 4);
1160 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1161 setclientid->se_callback_ident = be32_to_cpup(p++);
1167 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1171 if (argp->minorversion >= 1)
1172 return nfserr_notsupp;
1174 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1175 COPYMEM(&scd_c->sc_clientid, 8);
1176 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1181 /* Also used for NVERIFY */
1183 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1187 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1190 /* For convenience's sake, we compare raw xdr'd attributes in
1191 * nfsd4_proc_verify */
1194 verify->ve_attrlen = be32_to_cpup(p++);
1195 READ_BUF(verify->ve_attrlen);
1196 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1202 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1208 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1212 p = xdr_decode_hyper(p, &write->wr_offset);
1213 write->wr_stable_how = be32_to_cpup(p++);
1214 if (write->wr_stable_how > 2)
1216 write->wr_buflen = be32_to_cpup(p++);
1218 /* Sorry .. no magic macros for this.. *
1219 * READ_BUF(write->wr_buflen);
1220 * SAVEMEM(write->wr_buf, write->wr_buflen);
1222 avail = (char*)argp->end - (char*)argp->p;
1223 if (avail + argp->pagelen < write->wr_buflen) {
1224 dprintk("NFSD: xdr error (%s:%d)\n",
1225 __FILE__, __LINE__);
1228 write->wr_head.iov_base = p;
1229 write->wr_head.iov_len = avail;
1230 write->wr_pagelist = argp->pagelist;
1232 len = XDR_QUADLEN(write->wr_buflen) << 2;
1238 pages = len >> PAGE_SHIFT;
1239 argp->pagelist += pages;
1240 argp->pagelen -= pages * PAGE_SIZE;
1241 len -= pages * PAGE_SIZE;
1243 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1245 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1247 argp->p += XDR_QUADLEN(len);
1253 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1257 if (argp->minorversion >= 1)
1258 return nfserr_notsupp;
1261 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1262 rlockowner->rl_owner.len = be32_to_cpup(p++);
1263 READ_BUF(rlockowner->rl_owner.len);
1264 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1266 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1267 return nfserr_inval;
1272 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1273 struct nfsd4_exchange_id *exid)
1278 READ_BUF(NFS4_VERIFIER_SIZE);
1279 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1281 status = nfsd4_decode_opaque(argp, &exid->clname);
1283 return nfserr_bad_xdr;
1286 exid->flags = be32_to_cpup(p++);
1288 /* Ignore state_protect4_a */
1290 exid->spa_how = be32_to_cpup(p++);
1291 switch (exid->spa_how) {
1295 /* spo_must_enforce */
1297 dummy = be32_to_cpup(p++);
1298 READ_BUF(dummy * 4);
1301 /* spo_must_allow */
1303 dummy = be32_to_cpup(p++);
1304 READ_BUF(dummy * 4);
1310 dummy = be32_to_cpup(p++);
1311 READ_BUF(dummy * 4);
1315 dummy = be32_to_cpup(p++);
1316 READ_BUF(dummy * 4);
1319 /* ssp_hash_algs<> */
1321 tmp = be32_to_cpup(p++);
1324 dummy = be32_to_cpup(p++);
1326 p += XDR_QUADLEN(dummy);
1329 /* ssp_encr_algs<> */
1331 tmp = be32_to_cpup(p++);
1334 dummy = be32_to_cpup(p++);
1336 p += XDR_QUADLEN(dummy);
1339 /* ssp_window and ssp_num_gss_handles */
1341 dummy = be32_to_cpup(p++);
1342 dummy = be32_to_cpup(p++);
1348 /* Ignore Implementation ID */
1349 READ_BUF(4); /* nfs_impl_id4 array length */
1350 dummy = be32_to_cpup(p++);
1358 dummy = be32_to_cpup(p++);
1360 p += XDR_QUADLEN(dummy);
1364 dummy = be32_to_cpup(p++);
1366 p += XDR_QUADLEN(dummy);
1376 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1377 struct nfsd4_create_session *sess)
1383 COPYMEM(&sess->clientid, 8);
1384 sess->seqid = be32_to_cpup(p++);
1385 sess->flags = be32_to_cpup(p++);
1387 /* Fore channel attrs */
1389 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1390 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1391 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1392 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1393 sess->fore_channel.maxops = be32_to_cpup(p++);
1394 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1395 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1396 if (sess->fore_channel.nr_rdma_attrs == 1) {
1398 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1399 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1400 dprintk("Too many fore channel attr bitmaps!\n");
1404 /* Back channel attrs */
1406 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1407 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1408 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1409 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1410 sess->back_channel.maxops = be32_to_cpup(p++);
1411 sess->back_channel.maxreqs = be32_to_cpup(p++);
1412 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1413 if (sess->back_channel.nr_rdma_attrs == 1) {
1415 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1416 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1417 dprintk("Too many back channel attr bitmaps!\n");
1422 sess->callback_prog = be32_to_cpup(p++);
1423 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1428 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1429 struct nfsd4_destroy_session *destroy_session)
1432 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1433 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1439 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1440 struct nfsd4_free_stateid *free_stateid)
1444 READ_BUF(sizeof(stateid_t));
1445 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1446 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1452 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1453 struct nfsd4_sequence *seq)
1457 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1458 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1459 seq->seqid = be32_to_cpup(p++);
1460 seq->slotid = be32_to_cpup(p++);
1461 seq->maxslots = be32_to_cpup(p++);
1462 seq->cachethis = be32_to_cpup(p++);
1468 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1472 struct nfsd4_test_stateid_id *stateid;
1475 test_stateid->ts_num_ids = ntohl(*p++);
1477 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1479 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1480 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1482 status = nfserrno(-ENOMEM);
1486 INIT_LIST_HEAD(&stateid->ts_id_list);
1487 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1489 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1498 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1499 status = nfserr_bad_xdr;
1503 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1508 COPYMEM(&dc->clientid, 8);
1513 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1518 rc->rca_one_fs = be32_to_cpup(p++);
1524 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1530 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1532 return nfserr_notsupp;
1535 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1537 static nfsd4_dec nfsd4_dec_ops[] = {
1538 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1539 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1540 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1541 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1542 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1543 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1544 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1545 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1546 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1547 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1548 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1549 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1550 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1551 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1552 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1553 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1554 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1555 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1556 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1557 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1558 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1559 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1560 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1561 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1562 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1563 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1564 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1565 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1566 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1567 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1568 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1569 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1570 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1571 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1572 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1573 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1574 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1576 /* new operations for NFSv4.1 */
1577 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1578 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1579 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1580 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1581 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1582 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1583 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1584 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1585 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1586 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1587 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1588 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1589 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1590 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1591 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1592 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1593 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1594 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1595 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1599 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1601 if (op->opnum < FIRST_NFS4_OP)
1603 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1605 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1607 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1613 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1616 struct nfsd4_op *op;
1617 bool cachethis = false;
1618 int auth_slack= argp->rqstp->rq_auth_slack;
1619 int max_reply = auth_slack + 8; /* opcnt, status */
1625 argp->taglen = be32_to_cpup(p++);
1626 READ_BUF(argp->taglen + 8);
1627 SAVEMEM(argp->tag, argp->taglen);
1628 argp->minorversion = be32_to_cpup(p++);
1629 argp->opcnt = be32_to_cpup(p++);
1630 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1632 if (argp->taglen > NFSD4_MAX_TAGLEN)
1634 if (argp->opcnt > 100)
1637 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1638 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1640 argp->ops = argp->iops;
1641 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1646 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1649 for (i = 0; i < argp->opcnt; i++) {
1654 op->opnum = be32_to_cpup(p++);
1656 if (nfsd4_opnum_in_range(argp, op))
1657 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1659 op->opnum = OP_ILLEGAL;
1660 op->status = nfserr_op_illegal;
1663 * We'll try to cache the result in the DRC if any one
1664 * op in the compound wants to be cached:
1666 cachethis |= nfsd4_cache_this_op(op);
1668 if (op->opnum == OP_READ) {
1670 readbytes += nfsd4_max_reply(argp->rqstp, op);
1672 max_reply += nfsd4_max_reply(argp->rqstp, op);
1679 /* Sessions make the DRC unnecessary: */
1680 if (argp->minorversion)
1682 svc_reserve(argp->rqstp, max_reply + readbytes);
1683 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1685 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1686 argp->rqstp->rq_splice_ok = false;
1691 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1693 if (IS_I_VERSION(inode)) {
1694 p = xdr_encode_hyper(p, inode->i_version);
1696 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1697 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1702 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1704 *p++ = cpu_to_be32(c->atomic);
1705 if (c->change_supported) {
1706 p = xdr_encode_hyper(p, c->before_change);
1707 p = xdr_encode_hyper(p, c->after_change);
1709 *p++ = cpu_to_be32(c->before_ctime_sec);
1710 *p++ = cpu_to_be32(c->before_ctime_nsec);
1711 *p++ = cpu_to_be32(c->after_ctime_sec);
1712 *p++ = cpu_to_be32(c->after_ctime_nsec);
1717 /* Encode as an array of strings the string given with components
1718 * separated @sep, escaped with esc_enter and esc_exit.
1720 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1721 char *components, char esc_enter,
1727 int strlen, count=0;
1728 char *str, *end, *next;
1730 dprintk("nfsd4_encode_components(%s)\n", components);
1732 pathlen_offset = xdr->buf->len;
1733 p = xdr_reserve_space(xdr, 4);
1735 return nfserr_resource;
1736 p++; /* We will fill this in with @count later */
1738 end = str = components;
1740 bool found_esc = false;
1742 /* try to parse as esc_start, ..., esc_end, sep */
1743 if (*str == esc_enter) {
1744 for (; *end && (*end != esc_exit); end++)
1745 /* find esc_exit or end of string */;
1747 if (*end && (!*next || *next == sep)) {
1754 for (; *end && (*end != sep); end++)
1755 /* find sep or end of string */;
1759 p = xdr_reserve_space(xdr, strlen + 4);
1761 return nfserr_resource;
1762 p = xdr_encode_opaque(p, str, strlen);
1769 pathlen = htonl(xdr->buf->len - pathlen_offset);
1770 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1774 /* Encode as an array of strings the string given with components
1777 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1780 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
1784 * encode a location element of a fs_locations structure
1786 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1787 struct nfsd4_fs_location *location)
1791 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
1795 status = nfsd4_encode_components(xdr, '/', location->path);
1802 * Encode a path in RFC3530 'pathname4' format
1804 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1805 const struct path *root,
1806 const struct path *path)
1808 struct path cur = *path;
1810 struct dentry **components = NULL;
1811 unsigned int ncomponents = 0;
1812 __be32 err = nfserr_jukebox;
1814 dprintk("nfsd4_encode_components(");
1817 /* First walk the path up to the nfsd root, and store the
1818 * dentries/path components in an array.
1821 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1823 if (cur.dentry == cur.mnt->mnt_root) {
1824 if (follow_up(&cur))
1828 if ((ncomponents & 15) == 0) {
1829 struct dentry **new;
1830 new = krealloc(components,
1831 sizeof(*new) * (ncomponents + 16),
1837 components[ncomponents++] = cur.dentry;
1838 cur.dentry = dget_parent(cur.dentry);
1840 err = nfserr_resource;
1841 p = xdr_reserve_space(xdr, 4);
1844 *p++ = cpu_to_be32(ncomponents);
1846 while (ncomponents) {
1847 struct dentry *dentry = components[ncomponents - 1];
1850 spin_lock(&dentry->d_lock);
1851 len = dentry->d_name.len;
1852 p = xdr_reserve_space(xdr, len + 4);
1854 spin_unlock(&dentry->d_lock);
1857 p = xdr_encode_opaque(p, dentry->d_name.name, len);
1858 dprintk("/%s", dentry->d_name.name);
1859 spin_unlock(&dentry->d_lock);
1868 dput(components[--ncomponents]);
1874 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1875 struct svc_rqst *rqstp, const struct path *path)
1877 struct svc_export *exp_ps;
1880 exp_ps = rqst_find_fsidzero_export(rqstp);
1882 return nfserrno(PTR_ERR(exp_ps));
1883 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
1889 * encode a fs_locations structure
1891 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1892 struct svc_rqst *rqstp, struct svc_export *exp)
1897 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1899 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
1902 p = xdr_reserve_space(xdr, 4);
1904 return nfserr_resource;
1905 *p++ = cpu_to_be32(fslocs->locations_count);
1906 for (i=0; i<fslocs->locations_count; i++) {
1907 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
1914 static u32 nfs4_file_type(umode_t mode)
1916 switch (mode & S_IFMT) {
1917 case S_IFIFO: return NF4FIFO;
1918 case S_IFCHR: return NF4CHR;
1919 case S_IFDIR: return NF4DIR;
1920 case S_IFBLK: return NF4BLK;
1921 case S_IFLNK: return NF4LNK;
1922 case S_IFREG: return NF4REG;
1923 case S_IFSOCK: return NF4SOCK;
1924 default: return NF4BAD;
1928 static inline __be32
1929 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1930 struct nfs4_ace *ace)
1932 if (ace->whotype != NFS4_ACL_WHO_NAMED)
1933 return nfs4_acl_write_who(xdr, ace->whotype);
1934 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1935 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
1937 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1940 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1941 FATTR4_WORD0_RDATTR_ERROR)
1942 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1944 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1945 static inline __be32
1946 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1947 void *context, int len)
1951 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1953 return nfserr_resource;
1956 * For now we use a 0 here to indicate the null translation; in
1957 * the future we may place a call to translation code here.
1959 *p++ = cpu_to_be32(0); /* lfs */
1960 *p++ = cpu_to_be32(0); /* pi */
1961 p = xdr_encode_opaque(p, context, len);
1965 static inline __be32
1966 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1967 void *context, int len)
1971 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1973 /* As per referral draft: */
1974 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1975 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1976 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1977 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1978 *rdattr_err = NFSERR_MOVED;
1980 return nfserr_moved;
1982 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1983 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1988 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1990 struct path path = exp->ex_path;
1994 while (follow_up(&path)) {
1995 if (path.dentry != path.mnt->mnt_root)
1998 err = vfs_getattr(&path, stat);
2004 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2008 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2009 struct svc_export *exp,
2010 struct dentry *dentry, u32 *bmval,
2011 struct svc_rqst *rqstp, int ignore_crossmnt)
2013 u32 bmval0 = bmval[0];
2014 u32 bmval1 = bmval[1];
2015 u32 bmval2 = bmval[2];
2017 struct svc_fh *tempfh = NULL;
2018 struct kstatfs statfs;
2020 int starting_len = xdr->buf->len;
2029 struct nfs4_acl *acl = NULL;
2030 void *context = NULL;
2032 bool contextsupport = false;
2033 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2034 u32 minorversion = resp->cstate.minorversion;
2035 struct path path = {
2036 .mnt = exp->ex_path.mnt,
2039 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2041 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2042 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2043 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2044 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2046 if (exp->ex_fslocs.migrated) {
2048 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2053 err = vfs_getattr(&path, &stat);
2056 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2057 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2058 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2059 FATTR4_WORD1_SPACE_TOTAL))) {
2060 err = vfs_statfs(&path, &statfs);
2064 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2065 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2066 status = nfserr_jukebox;
2069 fh_init(tempfh, NFS4_FHSIZE);
2070 status = fh_compose(tempfh, exp, dentry, NULL);
2075 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2076 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2077 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2078 aclsupport = (err == 0);
2079 if (bmval0 & FATTR4_WORD0_ACL) {
2080 if (err == -EOPNOTSUPP)
2081 bmval0 &= ~FATTR4_WORD0_ACL;
2082 else if (err == -EINVAL) {
2083 status = nfserr_attrnotsupp;
2085 } else if (err != 0)
2090 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2091 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2092 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2093 err = security_inode_getsecctx(dentry->d_inode,
2094 &context, &contextlen);
2095 contextsupport = (err == 0);
2096 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2097 if (err == -EOPNOTSUPP)
2098 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2103 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2106 p = xdr_reserve_space(xdr, 16);
2109 *p++ = cpu_to_be32(3);
2110 *p++ = cpu_to_be32(bmval0);
2111 *p++ = cpu_to_be32(bmval1);
2112 *p++ = cpu_to_be32(bmval2);
2113 } else if (bmval1) {
2114 p = xdr_reserve_space(xdr, 12);
2117 *p++ = cpu_to_be32(2);
2118 *p++ = cpu_to_be32(bmval0);
2119 *p++ = cpu_to_be32(bmval1);
2121 p = xdr_reserve_space(xdr, 8);
2124 *p++ = cpu_to_be32(1);
2125 *p++ = cpu_to_be32(bmval0);
2128 attrlen_offset = xdr->buf->len;
2129 p = xdr_reserve_space(xdr, 4);
2132 p++; /* to be backfilled later */
2134 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2135 u32 word0 = nfsd_suppattrs0(minorversion);
2136 u32 word1 = nfsd_suppattrs1(minorversion);
2137 u32 word2 = nfsd_suppattrs2(minorversion);
2140 word0 &= ~FATTR4_WORD0_ACL;
2141 if (!contextsupport)
2142 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2144 p = xdr_reserve_space(xdr, 12);
2147 *p++ = cpu_to_be32(2);
2148 *p++ = cpu_to_be32(word0);
2149 *p++ = cpu_to_be32(word1);
2151 p = xdr_reserve_space(xdr, 16);
2154 *p++ = cpu_to_be32(3);
2155 *p++ = cpu_to_be32(word0);
2156 *p++ = cpu_to_be32(word1);
2157 *p++ = cpu_to_be32(word2);
2160 if (bmval0 & FATTR4_WORD0_TYPE) {
2161 p = xdr_reserve_space(xdr, 4);
2164 dummy = nfs4_file_type(stat.mode);
2165 if (dummy == NF4BAD) {
2166 status = nfserr_serverfault;
2169 *p++ = cpu_to_be32(dummy);
2171 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2172 p = xdr_reserve_space(xdr, 4);
2175 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2176 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2178 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2179 NFS4_FH_VOL_RENAME);
2181 if (bmval0 & FATTR4_WORD0_CHANGE) {
2182 p = xdr_reserve_space(xdr, 8);
2185 p = encode_change(p, &stat, dentry->d_inode);
2187 if (bmval0 & FATTR4_WORD0_SIZE) {
2188 p = xdr_reserve_space(xdr, 8);
2191 p = xdr_encode_hyper(p, stat.size);
2193 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2194 p = xdr_reserve_space(xdr, 4);
2197 *p++ = cpu_to_be32(1);
2199 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2200 p = xdr_reserve_space(xdr, 4);
2203 *p++ = cpu_to_be32(1);
2205 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2206 p = xdr_reserve_space(xdr, 4);
2209 *p++ = cpu_to_be32(0);
2211 if (bmval0 & FATTR4_WORD0_FSID) {
2212 p = xdr_reserve_space(xdr, 16);
2215 if (exp->ex_fslocs.migrated) {
2216 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2217 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2218 } else switch(fsid_source(fhp)) {
2219 case FSIDSOURCE_FSID:
2220 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2221 p = xdr_encode_hyper(p, (u64)0);
2223 case FSIDSOURCE_DEV:
2224 *p++ = cpu_to_be32(0);
2225 *p++ = cpu_to_be32(MAJOR(stat.dev));
2226 *p++ = cpu_to_be32(0);
2227 *p++ = cpu_to_be32(MINOR(stat.dev));
2229 case FSIDSOURCE_UUID:
2230 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2235 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2236 p = xdr_reserve_space(xdr, 4);
2239 *p++ = cpu_to_be32(0);
2241 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2242 p = xdr_reserve_space(xdr, 4);
2245 *p++ = cpu_to_be32(nn->nfsd4_lease);
2247 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2248 p = xdr_reserve_space(xdr, 4);
2251 *p++ = cpu_to_be32(rdattr_err);
2253 if (bmval0 & FATTR4_WORD0_ACL) {
2254 struct nfs4_ace *ace;
2257 p = xdr_reserve_space(xdr, 4);
2261 *p++ = cpu_to_be32(0);
2264 p = xdr_reserve_space(xdr, 4);
2267 *p++ = cpu_to_be32(acl->naces);
2269 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2270 p = xdr_reserve_space(xdr, 4*3);
2273 *p++ = cpu_to_be32(ace->type);
2274 *p++ = cpu_to_be32(ace->flag);
2275 *p++ = cpu_to_be32(ace->access_mask &
2277 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2283 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2284 p = xdr_reserve_space(xdr, 4);
2287 *p++ = cpu_to_be32(aclsupport ?
2288 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2290 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2291 p = xdr_reserve_space(xdr, 4);
2294 *p++ = cpu_to_be32(1);
2296 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2297 p = xdr_reserve_space(xdr, 4);
2300 *p++ = cpu_to_be32(0);
2302 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2303 p = xdr_reserve_space(xdr, 4);
2306 *p++ = cpu_to_be32(1);
2308 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2309 p = xdr_reserve_space(xdr, 4);
2312 *p++ = cpu_to_be32(1);
2314 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2315 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2318 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2319 fhp->fh_handle.fh_size);
2321 if (bmval0 & FATTR4_WORD0_FILEID) {
2322 p = xdr_reserve_space(xdr, 8);
2325 p = xdr_encode_hyper(p, stat.ino);
2327 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2328 p = xdr_reserve_space(xdr, 8);
2331 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2333 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2334 p = xdr_reserve_space(xdr, 8);
2337 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2339 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2340 p = xdr_reserve_space(xdr, 8);
2343 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2345 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2346 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2350 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2351 p = xdr_reserve_space(xdr, 4);
2354 *p++ = cpu_to_be32(1);
2356 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2357 p = xdr_reserve_space(xdr, 8);
2360 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2362 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2363 p = xdr_reserve_space(xdr, 4);
2366 *p++ = cpu_to_be32(255);
2368 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2369 p = xdr_reserve_space(xdr, 4);
2372 *p++ = cpu_to_be32(statfs.f_namelen);
2374 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2375 p = xdr_reserve_space(xdr, 8);
2378 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2380 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2381 p = xdr_reserve_space(xdr, 8);
2384 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2386 if (bmval1 & FATTR4_WORD1_MODE) {
2387 p = xdr_reserve_space(xdr, 4);
2390 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2392 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2393 p = xdr_reserve_space(xdr, 4);
2396 *p++ = cpu_to_be32(1);
2398 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2399 p = xdr_reserve_space(xdr, 4);
2402 *p++ = cpu_to_be32(stat.nlink);
2404 if (bmval1 & FATTR4_WORD1_OWNER) {
2405 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2409 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2410 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2414 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2415 p = xdr_reserve_space(xdr, 8);
2418 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2419 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2421 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2422 p = xdr_reserve_space(xdr, 8);
2425 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2426 p = xdr_encode_hyper(p, dummy64);
2428 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2429 p = xdr_reserve_space(xdr, 8);
2432 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2433 p = xdr_encode_hyper(p, dummy64);
2435 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2436 p = xdr_reserve_space(xdr, 8);
2439 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2440 p = xdr_encode_hyper(p, dummy64);
2442 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2443 p = xdr_reserve_space(xdr, 8);
2446 dummy64 = (u64)stat.blocks << 9;
2447 p = xdr_encode_hyper(p, dummy64);
2449 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2450 p = xdr_reserve_space(xdr, 12);
2453 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2454 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2456 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2457 p = xdr_reserve_space(xdr, 12);
2460 *p++ = cpu_to_be32(0);
2461 *p++ = cpu_to_be32(1);
2462 *p++ = cpu_to_be32(0);
2464 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2465 p = xdr_reserve_space(xdr, 12);
2468 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2469 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2471 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2472 p = xdr_reserve_space(xdr, 12);
2475 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2476 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2478 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2479 p = xdr_reserve_space(xdr, 8);
2483 * Get parent's attributes if not ignoring crossmount
2484 * and this is the root of a cross-mounted filesystem.
2486 if (ignore_crossmnt == 0 &&
2487 dentry == exp->ex_path.mnt->mnt_root)
2488 get_parent_attributes(exp, &stat);
2489 p = xdr_encode_hyper(p, stat.ino);
2491 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2492 status = nfsd4_encode_security_label(xdr, rqstp, context,
2497 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2498 p = xdr_reserve_space(xdr, 16);
2501 *p++ = cpu_to_be32(3);
2502 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2503 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2504 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2507 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2508 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2512 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2514 security_release_secctx(context, contextlen);
2515 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2522 xdr_truncate_encode(xdr, starting_len);
2525 status = nfserrno(err);
2528 status = nfserr_resource;
2532 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2533 struct xdr_buf *buf, __be32 *p, int bytes)
2535 xdr->scratch.iov_len = 0;
2536 memset(buf, 0, sizeof(struct xdr_buf));
2537 buf->head[0].iov_base = p;
2538 buf->head[0].iov_len = 0;
2541 xdr->iov = buf->head;
2543 xdr->end = (void *)p + bytes;
2544 buf->buflen = bytes;
2547 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2548 struct svc_fh *fhp, struct svc_export *exp,
2549 struct dentry *dentry, u32 *bmval,
2550 struct svc_rqst *rqstp, int ignore_crossmnt)
2552 struct xdr_buf dummy;
2553 struct xdr_stream xdr;
2556 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2557 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2563 static inline int attributes_need_mount(u32 *bmval)
2565 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2567 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2573 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2574 const char *name, int namlen)
2576 struct svc_export *exp = cd->rd_fhp->fh_export;
2577 struct dentry *dentry;
2579 int ignore_crossmnt = 0;
2581 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2583 return nfserrno(PTR_ERR(dentry));
2584 if (!dentry->d_inode) {
2586 * nfsd_buffered_readdir drops the i_mutex between
2587 * readdir and calling this callback, leaving a window
2588 * where this directory entry could have gone away.
2591 return nfserr_noent;
2596 * In the case of a mountpoint, the client may be asking for
2597 * attributes that are only properties of the underlying filesystem
2598 * as opposed to the cross-mounted file system. In such a case,
2599 * we will not follow the cross mount and will fill the attribtutes
2600 * directly from the mountpoint dentry.
2602 if (nfsd_mountpoint(dentry, exp)) {
2605 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2606 && !attributes_need_mount(cd->rd_bmval)) {
2607 ignore_crossmnt = 1;
2611 * Why the heck aren't we just using nfsd_lookup??
2612 * Different "."/".." handling? Something else?
2613 * At least, add a comment here to explain....
2615 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2617 nfserr = nfserrno(err);
2620 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2626 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2627 cd->rd_rqstp, ignore_crossmnt);
2635 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2639 p = xdr_reserve_space(xdr, 20);
2643 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2644 *p++ = htonl(0); /* bmval1 */
2646 *p++ = htonl(4); /* attribute length */
2647 *p++ = nfserr; /* no htonl */
2652 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2653 loff_t offset, u64 ino, unsigned int d_type)
2655 struct readdir_cd *ccd = ccdv;
2656 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2657 struct xdr_stream *xdr = cd->xdr;
2658 int start_offset = xdr->buf->len;
2660 u32 name_and_cookie;
2662 __be32 nfserr = nfserr_toosmall;
2666 /* In nfsv4, "." and ".." never make it onto the wire.. */
2667 if (name && isdotent(name, namlen)) {
2668 cd->common.err = nfs_ok;
2672 if (cd->cookie_offset) {
2673 wire_offset = cpu_to_be64(offset);
2674 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2678 p = xdr_reserve_space(xdr, 4);
2681 *p++ = xdr_one; /* mark entry present */
2682 cookie_offset = xdr->buf->len;
2683 p = xdr_reserve_space(xdr, 3*4 + namlen);
2686 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2687 p = xdr_encode_array(p, name, namlen); /* name length & name */
2689 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2693 case nfserr_resource:
2694 nfserr = nfserr_toosmall;
2697 xdr_truncate_encode(xdr, start_offset);
2701 * If the client requested the RDATTR_ERROR attribute,
2702 * we stuff the error code into this attribute
2703 * and continue. If this attribute was not requested,
2704 * then in accordance with the spec, we fail the
2705 * entire READDIR operation(!)
2707 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2709 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2711 nfserr = nfserr_toosmall;
2715 nfserr = nfserr_toosmall;
2716 entry_bytes = xdr->buf->len - start_offset;
2717 if (entry_bytes > cd->rd_maxcount)
2719 cd->rd_maxcount -= entry_bytes;
2720 if (!cd->rd_dircount)
2723 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
2724 * let's always let through the first entry, at least:
2726 name_and_cookie = 4 * XDR_QUADLEN(namlen) + 8;
2727 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
2729 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
2730 cd->cookie_offset = cookie_offset;
2732 cd->common.err = nfs_ok;
2735 xdr_truncate_encode(xdr, start_offset);
2736 cd->common.err = nfserr;
2741 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
2745 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2747 return nfserr_resource;
2748 *p++ = cpu_to_be32(sid->si_generation);
2749 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2750 sizeof(stateid_opaque_t));
2755 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2757 struct xdr_stream *xdr = &resp->xdr;
2761 p = xdr_reserve_space(xdr, 8);
2763 return nfserr_resource;
2764 *p++ = cpu_to_be32(access->ac_supported);
2765 *p++ = cpu_to_be32(access->ac_resp_access);
2770 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2772 struct xdr_stream *xdr = &resp->xdr;
2776 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2778 return nfserr_resource;
2779 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2780 NFS4_MAX_SESSIONID_LEN);
2781 *p++ = cpu_to_be32(bcts->dir);
2782 /* Sorry, we do not yet support RDMA over 4.1: */
2783 *p++ = cpu_to_be32(0);
2789 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2791 struct xdr_stream *xdr = &resp->xdr;
2794 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
2801 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2803 struct xdr_stream *xdr = &resp->xdr;
2807 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2809 return nfserr_resource;
2810 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2811 NFS4_VERIFIER_SIZE);
2817 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2819 struct xdr_stream *xdr = &resp->xdr;
2823 p = xdr_reserve_space(xdr, 32);
2825 return nfserr_resource;
2826 p = encode_cinfo(p, &create->cr_cinfo);
2827 *p++ = cpu_to_be32(2);
2828 *p++ = cpu_to_be32(create->cr_bmval[0]);
2829 *p++ = cpu_to_be32(create->cr_bmval[1]);
2835 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2837 struct svc_fh *fhp = getattr->ga_fhp;
2838 struct xdr_stream *xdr = &resp->xdr;
2843 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2850 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2852 struct xdr_stream *xdr = &resp->xdr;
2853 struct svc_fh *fhp = *fhpp;
2858 len = fhp->fh_handle.fh_size;
2859 p = xdr_reserve_space(xdr, len + 4);
2861 return nfserr_resource;
2862 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
2868 * Including all fields other than the name, a LOCK4denied structure requires
2869 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2872 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
2874 struct xdr_netobj *conf = &ld->ld_owner;
2878 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
2881 * Don't fail to return the result just because we can't
2882 * return the conflicting open:
2890 return nfserr_resource;
2892 p = xdr_encode_hyper(p, ld->ld_start);
2893 p = xdr_encode_hyper(p, ld->ld_length);
2894 *p++ = cpu_to_be32(ld->ld_type);
2896 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2897 p = xdr_encode_opaque(p, conf->data, conf->len);
2899 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2900 p = xdr_encode_hyper(p, (u64)0); /* clientid */
2901 *p++ = cpu_to_be32(0); /* length of owner name */
2903 return nfserr_denied;
2907 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2909 struct xdr_stream *xdr = &resp->xdr;
2912 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
2913 else if (nfserr == nfserr_denied)
2914 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
2920 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2922 struct xdr_stream *xdr = &resp->xdr;
2924 if (nfserr == nfserr_denied)
2925 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
2930 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2932 struct xdr_stream *xdr = &resp->xdr;
2935 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
2942 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2944 struct xdr_stream *xdr = &resp->xdr;
2948 p = xdr_reserve_space(xdr, 20);
2950 return nfserr_resource;
2951 p = encode_cinfo(p, &link->li_cinfo);
2958 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2960 struct xdr_stream *xdr = &resp->xdr;
2966 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2969 p = xdr_reserve_space(xdr, 40);
2971 return nfserr_resource;
2972 p = encode_cinfo(p, &open->op_cinfo);
2973 *p++ = cpu_to_be32(open->op_rflags);
2974 *p++ = cpu_to_be32(2);
2975 *p++ = cpu_to_be32(open->op_bmval[0]);
2976 *p++ = cpu_to_be32(open->op_bmval[1]);
2977 *p++ = cpu_to_be32(open->op_delegate_type);
2979 switch (open->op_delegate_type) {
2980 case NFS4_OPEN_DELEGATE_NONE:
2982 case NFS4_OPEN_DELEGATE_READ:
2983 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2986 p = xdr_reserve_space(xdr, 20);
2988 return nfserr_resource;
2989 *p++ = cpu_to_be32(open->op_recall);
2992 * TODO: ACE's in delegations
2994 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2995 *p++ = cpu_to_be32(0);
2996 *p++ = cpu_to_be32(0);
2997 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
2999 case NFS4_OPEN_DELEGATE_WRITE:
3000 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3003 p = xdr_reserve_space(xdr, 32);
3005 return nfserr_resource;
3006 *p++ = cpu_to_be32(0);
3009 * TODO: space_limit's in delegations
3011 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3012 *p++ = cpu_to_be32(~(u32)0);
3013 *p++ = cpu_to_be32(~(u32)0);
3016 * TODO: ACE's in delegations
3018 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3019 *p++ = cpu_to_be32(0);
3020 *p++ = cpu_to_be32(0);
3021 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3023 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3024 switch (open->op_why_no_deleg) {
3025 case WND4_CONTENTION:
3027 p = xdr_reserve_space(xdr, 8);
3029 return nfserr_resource;
3030 *p++ = cpu_to_be32(open->op_why_no_deleg);
3031 /* deleg signaling not supported yet: */
3032 *p++ = cpu_to_be32(0);
3035 p = xdr_reserve_space(xdr, 4);
3037 return nfserr_resource;
3038 *p++ = cpu_to_be32(open->op_why_no_deleg);
3044 /* XXX save filehandle here */
3050 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3052 struct xdr_stream *xdr = &resp->xdr;
3055 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3061 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3063 struct xdr_stream *xdr = &resp->xdr;
3066 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3071 static __be32 nfsd4_encode_splice_read(
3072 struct nfsd4_compoundres *resp,
3073 struct nfsd4_read *read,
3074 struct file *file, unsigned long maxcount)
3076 struct xdr_stream *xdr = &resp->xdr;
3077 struct xdr_buf *buf = xdr->buf;
3081 __be32 *p = xdr->p - 2;
3083 /* Make sure there will be room for padding if needed */
3084 if (xdr->end - xdr->p < 1)
3085 return nfserr_resource;
3087 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3088 read->rd_offset, &maxcount);
3091 * nfsd_splice_actor may have already messed with the
3092 * page length; reset it so as not to confuse
3093 * xdr_truncate_encode:
3099 eof = (read->rd_offset + maxcount >=
3100 read->rd_fhp->fh_dentry->d_inode->i_size);
3102 *(p++) = htonl(eof);
3103 *(p++) = htonl(maxcount);
3105 buf->page_len = maxcount;
3106 buf->len += maxcount;
3107 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3110 /* Use rest of head for padding and remaining ops: */
3111 buf->tail[0].iov_base = xdr->p;
3112 buf->tail[0].iov_len = 0;
3113 xdr->iov = buf->tail;
3115 int pad = 4 - (maxcount&3);
3119 buf->tail[0].iov_base += maxcount&3;
3120 buf->tail[0].iov_len = pad;
3124 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3125 buf->buflen - buf->len);
3126 buf->buflen = buf->len + space_left;
3127 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3132 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3133 struct nfsd4_read *read,
3134 struct file *file, unsigned long maxcount)
3136 struct xdr_stream *xdr = &resp->xdr;
3139 int starting_len = xdr->buf->len - 8;
3151 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3152 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3154 resp->rqstp->rq_vec[v].iov_base = p;
3155 resp->rqstp->rq_vec[v].iov_len = thislen;
3160 thislen = min_t(long, len, PAGE_SIZE);
3161 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3163 resp->rqstp->rq_vec[v].iov_base = p;
3164 resp->rqstp->rq_vec[v].iov_len = thislen;
3170 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3171 read->rd_vlen, &maxcount);
3174 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3176 eof = (read->rd_offset + maxcount >=
3177 read->rd_fhp->fh_dentry->d_inode->i_size);
3180 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3181 tmp = htonl(maxcount);
3182 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3184 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3185 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3192 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3193 struct nfsd4_read *read)
3195 unsigned long maxcount;
3196 struct xdr_stream *xdr = &resp->xdr;
3197 struct file *file = read->rd_filp;
3198 int starting_len = xdr->buf->len;
3206 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3208 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3209 return nfserr_resource;
3211 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3213 return nfserr_resource;
3215 xdr_commit_encode(xdr);
3217 maxcount = svc_max_payload(resp->rqstp);
3218 maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len));
3219 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3221 if (!read->rd_filp) {
3222 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3228 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3229 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3231 err = nfsd4_encode_readv(resp, read, file, maxcount);
3234 nfsd_put_tmp_read_open(file, ra);
3238 xdr_truncate_encode(xdr, starting_len);
3243 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3248 struct xdr_stream *xdr = &resp->xdr;
3249 int length_offset = xdr->buf->len;
3255 p = xdr_reserve_space(xdr, 4);
3257 return nfserr_resource;
3258 maxcount = PAGE_SIZE;
3260 p = xdr_reserve_space(xdr, maxcount);
3262 return nfserr_resource;
3264 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3265 * if they would overflow the buffer. Is this kosher in NFSv4? If
3266 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3267 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3269 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3270 (char *)p, &maxcount);
3271 if (nfserr == nfserr_isdir)
3272 nfserr = nfserr_inval;
3274 xdr_truncate_encode(xdr, length_offset);
3278 wire_count = htonl(maxcount);
3279 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3280 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3282 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3283 &zero, 4 - (maxcount&3));
3288 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3294 struct xdr_stream *xdr = &resp->xdr;
3295 int starting_len = xdr->buf->len;
3301 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3303 return nfserr_resource;
3305 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3306 *p++ = cpu_to_be32(0);
3307 *p++ = cpu_to_be32(0);
3308 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3309 - (char *)resp->xdr.buf->head[0].iov_base;
3312 * Number of bytes left for directory entries allowing for the
3313 * final 8 bytes of the readdir and a following failed op:
3315 bytes_left = xdr->buf->buflen - xdr->buf->len
3316 - COMPOUND_ERR_SLACK_SPACE - 8;
3317 if (bytes_left < 0) {
3318 nfserr = nfserr_resource;
3321 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3323 * Note the rfc defines rd_maxcount as the size of the
3324 * READDIR4resok structure, which includes the verifier above
3325 * and the 8 bytes encoded at the end of this function:
3327 if (maxcount < 16) {
3328 nfserr = nfserr_toosmall;
3331 maxcount = min_t(int, maxcount-16, bytes_left);
3333 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3334 if (!readdir->rd_dircount)
3335 readdir->rd_dircount = INT_MAX;
3338 readdir->rd_maxcount = maxcount;
3339 readdir->common.err = 0;
3340 readdir->cookie_offset = 0;
3342 offset = readdir->rd_cookie;
3343 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3345 &readdir->common, nfsd4_encode_dirent);
3346 if (nfserr == nfs_ok &&
3347 readdir->common.err == nfserr_toosmall &&
3348 xdr->buf->len == starting_len + 8) {
3349 /* nothing encoded; which limit did we hit?: */
3350 if (maxcount - 16 < bytes_left)
3351 /* It was the fault of rd_maxcount: */
3352 nfserr = nfserr_toosmall;
3354 /* We ran out of buffer space: */
3355 nfserr = nfserr_resource;
3360 if (readdir->cookie_offset) {
3361 wire_offset = cpu_to_be64(offset);
3362 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3366 p = xdr_reserve_space(xdr, 8);
3371 *p++ = 0; /* no more entries */
3372 *p++ = htonl(readdir->common.err == nfserr_eof);
3376 xdr_truncate_encode(xdr, starting_len);
3381 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3383 struct xdr_stream *xdr = &resp->xdr;
3387 p = xdr_reserve_space(xdr, 20);
3389 return nfserr_resource;
3390 p = encode_cinfo(p, &remove->rm_cinfo);
3396 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3398 struct xdr_stream *xdr = &resp->xdr;
3402 p = xdr_reserve_space(xdr, 40);
3404 return nfserr_resource;
3405 p = encode_cinfo(p, &rename->rn_sinfo);
3406 p = encode_cinfo(p, &rename->rn_tinfo);
3412 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3413 __be32 nfserr, struct svc_export *exp)
3415 u32 i, nflavs, supported;
3416 struct exp_flavor_info *flavs;
3417 struct exp_flavor_info def_flavs[2];
3418 __be32 *p, *flavorsp;
3419 static bool report = true;
3423 nfserr = nfserr_resource;
3424 if (exp->ex_nflavors) {
3425 flavs = exp->ex_flavors;
3426 nflavs = exp->ex_nflavors;
3427 } else { /* Handling of some defaults in absence of real secinfo: */
3429 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3431 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3432 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3433 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3435 flavs[0].pseudoflavor
3436 = svcauth_gss_flavor(exp->ex_client);
3439 flavs[0].pseudoflavor
3440 = exp->ex_client->flavour->flavour;
3445 p = xdr_reserve_space(xdr, 4);
3448 flavorsp = p++; /* to be backfilled later */
3450 for (i = 0; i < nflavs; i++) {
3451 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3452 struct rpcsec_gss_info info;
3454 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3456 p = xdr_reserve_space(xdr, 4 + 4 +
3457 XDR_LEN(info.oid.len) + 4 + 4);
3460 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3461 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3462 *p++ = cpu_to_be32(info.qop);
3463 *p++ = cpu_to_be32(info.service);
3464 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3466 p = xdr_reserve_space(xdr, 4);
3469 *p++ = cpu_to_be32(pf);
3472 pr_warn("NFS: SECINFO: security flavor %u "
3473 "is not supported\n", pf);
3477 if (nflavs != supported)
3479 *flavorsp = htonl(supported);
3488 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3489 struct nfsd4_secinfo *secinfo)
3491 struct xdr_stream *xdr = &resp->xdr;
3493 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3497 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3498 struct nfsd4_secinfo_no_name *secinfo)
3500 struct xdr_stream *xdr = &resp->xdr;
3502 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3506 * The SETATTR encode routine is special -- it always encodes a bitmap,
3507 * regardless of the error status.
3510 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3512 struct xdr_stream *xdr = &resp->xdr;
3515 p = xdr_reserve_space(xdr, 16);
3517 return nfserr_resource;
3519 *p++ = cpu_to_be32(3);
3520 *p++ = cpu_to_be32(0);
3521 *p++ = cpu_to_be32(0);
3522 *p++ = cpu_to_be32(0);
3525 *p++ = cpu_to_be32(3);
3526 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3527 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3528 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3534 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3536 struct xdr_stream *xdr = &resp->xdr;
3540 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3542 return nfserr_resource;
3543 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3544 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3545 NFS4_VERIFIER_SIZE);
3547 else if (nfserr == nfserr_clid_inuse) {
3548 p = xdr_reserve_space(xdr, 8);
3550 return nfserr_resource;
3551 *p++ = cpu_to_be32(0);
3552 *p++ = cpu_to_be32(0);
3558 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3560 struct xdr_stream *xdr = &resp->xdr;
3564 p = xdr_reserve_space(xdr, 16);
3566 return nfserr_resource;
3567 *p++ = cpu_to_be32(write->wr_bytes_written);
3568 *p++ = cpu_to_be32(write->wr_how_written);
3569 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3570 NFS4_VERIFIER_SIZE);
3575 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3576 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3577 1 << (OP_EXCHANGE_ID - 32) |
3578 1 << (OP_CREATE_SESSION - 32) |
3579 1 << (OP_DESTROY_SESSION - 32) |
3580 1 << (OP_DESTROY_CLIENTID - 32)
3584 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3585 struct nfsd4_exchange_id *exid)
3587 struct xdr_stream *xdr = &resp->xdr;
3592 int server_scope_sz;
3593 uint64_t minor_id = 0;
3598 major_id = utsname()->nodename;
3599 major_id_sz = strlen(major_id);
3600 server_scope = utsname()->nodename;
3601 server_scope_sz = strlen(server_scope);
3603 p = xdr_reserve_space(xdr,
3604 8 /* eir_clientid */ +
3605 4 /* eir_sequenceid */ +
3609 return nfserr_resource;
3611 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3612 *p++ = cpu_to_be32(exid->seqid);
3613 *p++ = cpu_to_be32(exid->flags);
3615 *p++ = cpu_to_be32(exid->spa_how);
3617 switch (exid->spa_how) {
3621 /* spo_must_enforce, spo_must_allow */
3622 p = xdr_reserve_space(xdr, 16);
3624 return nfserr_resource;
3626 /* spo_must_enforce bitmap: */
3627 *p++ = cpu_to_be32(2);
3628 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3629 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3630 /* empty spo_must_allow bitmap: */
3631 *p++ = cpu_to_be32(0);
3638 p = xdr_reserve_space(xdr,
3639 8 /* so_minor_id */ +
3640 4 /* so_major_id.len */ +
3641 (XDR_QUADLEN(major_id_sz) * 4) +
3642 4 /* eir_server_scope.len */ +
3643 (XDR_QUADLEN(server_scope_sz) * 4) +
3644 4 /* eir_server_impl_id.count (0) */);
3646 return nfserr_resource;
3648 /* The server_owner struct */
3649 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3651 p = xdr_encode_opaque(p, major_id, major_id_sz);
3654 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3656 /* Implementation id */
3657 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3662 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3663 struct nfsd4_create_session *sess)
3665 struct xdr_stream *xdr = &resp->xdr;
3671 p = xdr_reserve_space(xdr, 24);
3673 return nfserr_resource;
3674 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3675 NFS4_MAX_SESSIONID_LEN);
3676 *p++ = cpu_to_be32(sess->seqid);
3677 *p++ = cpu_to_be32(sess->flags);
3679 p = xdr_reserve_space(xdr, 28);
3681 return nfserr_resource;
3682 *p++ = cpu_to_be32(0); /* headerpadsz */
3683 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3684 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3685 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3686 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3687 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3688 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3690 if (sess->fore_channel.nr_rdma_attrs) {
3691 p = xdr_reserve_space(xdr, 4);
3693 return nfserr_resource;
3694 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3697 p = xdr_reserve_space(xdr, 28);
3699 return nfserr_resource;
3700 *p++ = cpu_to_be32(0); /* headerpadsz */
3701 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3702 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3703 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3704 *p++ = cpu_to_be32(sess->back_channel.maxops);
3705 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3706 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3708 if (sess->back_channel.nr_rdma_attrs) {
3709 p = xdr_reserve_space(xdr, 4);
3711 return nfserr_resource;
3712 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
3718 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3719 struct nfsd4_sequence *seq)
3721 struct xdr_stream *xdr = &resp->xdr;
3727 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3729 return nfserr_resource;
3730 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3731 NFS4_MAX_SESSIONID_LEN);
3732 *p++ = cpu_to_be32(seq->seqid);
3733 *p++ = cpu_to_be32(seq->slotid);
3734 /* Note slotid's are numbered from zero: */
3735 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3736 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3737 *p++ = cpu_to_be32(seq->status_flags);
3739 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
3744 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3745 struct nfsd4_test_stateid *test_stateid)
3747 struct xdr_stream *xdr = &resp->xdr;
3748 struct nfsd4_test_stateid_id *stateid, *next;
3754 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3756 return nfserr_resource;
3757 *p++ = htonl(test_stateid->ts_num_ids);
3759 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3760 *p++ = stateid->ts_id_status;
3767 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3772 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3775 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3776 * since we don't need to filter out obsolete ops as this is
3777 * done in the decoding phase.
3779 static nfsd4_enc nfsd4_enc_ops[] = {
3780 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3781 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3782 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3783 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3784 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3785 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3786 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3787 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3788 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3789 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3790 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3791 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3792 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3793 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3794 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3795 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3796 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3797 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3798 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3799 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3800 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3801 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3802 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3803 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3804 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3805 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3806 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3807 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3808 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3809 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3810 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3811 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3812 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3813 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3814 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3815 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3816 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3818 /* NFSv4.1 operations */
3819 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3820 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3821 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3822 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3823 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3824 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3825 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3826 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3827 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3828 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3829 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3830 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3831 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3832 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3833 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3834 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3835 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3836 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3837 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3841 * Calculate whether we still have space to encode repsize bytes.
3842 * There are two considerations:
3843 * - For NFS versions >=4.1, the size of the reply must stay within
3845 * - For all NFS versions, we must stay within limited preallocated
3848 * This is called before the operation is processed, so can only provide
3849 * an upper estimate. For some nonidempotent operations (such as
3850 * getattr), it's not necessarily a problem if that estimate is wrong,
3851 * as we can fail it after processing without significant side effects.
3853 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
3855 struct xdr_buf *buf = &resp->rqstp->rq_res;
3856 struct nfsd4_slot *slot = resp->cstate.slot;
3858 if (buf->len + respsize <= buf->buflen)
3860 if (!nfsd4_has_session(&resp->cstate))
3861 return nfserr_resource;
3862 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3864 return nfserr_rep_too_big_to_cache;
3866 return nfserr_rep_too_big;
3870 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3872 struct xdr_stream *xdr = &resp->xdr;
3873 struct nfs4_stateowner *so = resp->cstate.replay_owner;
3874 struct svc_rqst *rqstp = resp->rqstp;
3875 int post_err_offset;
3879 p = xdr_reserve_space(xdr, 8);
3884 *p++ = cpu_to_be32(op->opnum);
3885 post_err_offset = xdr->buf->len;
3887 if (op->opnum == OP_ILLEGAL)
3889 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3890 !nfsd4_enc_ops[op->opnum]);
3891 encoder = nfsd4_enc_ops[op->opnum];
3892 op->status = encoder(resp, op->status, &op->u);
3893 xdr_commit_encode(xdr);
3895 /* nfsd4_check_resp_size guarantees enough room for error status */
3897 int space_needed = 0;
3898 if (!nfsd4_last_compound_op(rqstp))
3899 space_needed = COMPOUND_ERR_SLACK_SPACE;
3900 op->status = nfsd4_check_resp_size(resp, space_needed);
3902 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3903 struct nfsd4_slot *slot = resp->cstate.slot;
3905 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3906 op->status = nfserr_rep_too_big_to_cache;
3908 op->status = nfserr_rep_too_big;
3910 if (op->status == nfserr_resource ||
3911 op->status == nfserr_rep_too_big ||
3912 op->status == nfserr_rep_too_big_to_cache) {
3914 * The operation may have already been encoded or
3915 * partially encoded. No op returns anything additional
3916 * in the case of one of these three errors, so we can
3917 * just truncate back to after the status. But it's a
3918 * bug if we had to do this on a non-idempotent op:
3920 warn_on_nonidempotent_op(op);
3921 xdr_truncate_encode(xdr, post_err_offset);
3924 int len = xdr->buf->len - post_err_offset;
3926 so->so_replay.rp_status = op->status;
3927 so->so_replay.rp_buflen = len;
3928 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3929 so->so_replay.rp_buf, len);
3932 /* Note that op->status is already in network byte order: */
3933 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
3937 * Encode the reply stored in the stateowner reply cache
3939 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3940 * previously sent already encoded operation.
3943 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
3946 struct nfs4_replay *rp = op->replay;
3950 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3955 *p++ = cpu_to_be32(op->opnum);
3956 *p++ = rp->rp_status; /* already xdr'ed */
3958 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
3962 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3964 return xdr_ressize_check(rqstp, p);
3967 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3969 struct svc_rqst *rqstp = rq;
3970 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3972 if (args->ops != args->iops) {
3974 args->ops = args->iops;
3978 while (args->to_free) {
3979 struct svcxdr_tmpbuf *tb = args->to_free;
3980 args->to_free = tb->next;
3987 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3989 if (rqstp->rq_arg.head[0].iov_len % 4) {
3990 /* client is nuts */
3991 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
3992 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
3996 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3997 args->pagelist = rqstp->rq_arg.pages;
3998 args->pagelen = rqstp->rq_arg.page_len;
4000 args->to_free = NULL;
4001 args->ops = args->iops;
4002 args->rqstp = rqstp;
4004 return !nfsd4_decode_compound(args);
4008 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4011 * All that remains is to write the tag and operation count...
4013 struct xdr_buf *buf = resp->xdr.buf;
4015 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4016 buf->tail[0].iov_len);
4018 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4021 *p++ = htonl(resp->taglen);
4022 memcpy(p, resp->tag, resp->taglen);
4023 p += XDR_QUADLEN(resp->taglen);
4024 *p++ = htonl(resp->opcnt);
4026 nfsd4_sequence_done(resp);