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 * defer_free - mark an allocation as deferred freed
185 * @argp: NFSv4 compound argument structure to be freed with
186 * @release: release callback to free @p, typically kfree()
187 * @p: pointer to be freed
189 * Marks @p to be freed when processing the compound operation
190 * described in @argp finishes.
193 defer_free(struct nfsd4_compoundargs *argp,
194 void (*release)(const void *), void *p)
198 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
202 tb->release = release;
203 tb->next = argp->to_free;
209 * savemem - duplicate a chunk of memory for later processing
210 * @argp: NFSv4 compound argument structure to be freed with
211 * @p: pointer to be duplicated
212 * @nbytes: length to be duplicated
214 * Returns a pointer to a copy of @nbytes bytes of memory at @p
215 * that are preserved until processing of the NFSv4 compound
216 * operation described by @argp finishes.
218 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
220 if (p == argp->tmp) {
221 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
225 BUG_ON(p != argp->tmpp);
228 if (defer_free(argp, kfree, p)) {
236 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
246 bmlen = be32_to_cpup(p++);
250 READ_BUF(bmlen << 2);
252 bmval[0] = be32_to_cpup(p++);
254 bmval[1] = be32_to_cpup(p++);
256 bmval[2] = be32_to_cpup(p++);
262 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
263 struct iattr *iattr, struct nfs4_acl **acl,
264 struct xdr_netobj *label)
266 int expected_len, len = 0;
273 if ((status = nfsd4_decode_bitmap(argp, bmval)))
277 expected_len = be32_to_cpup(p++);
279 if (bmval[0] & FATTR4_WORD0_SIZE) {
282 p = xdr_decode_hyper(p, &iattr->ia_size);
283 iattr->ia_valid |= ATTR_SIZE;
285 if (bmval[0] & FATTR4_WORD0_ACL) {
287 struct nfs4_ace *ace;
289 READ_BUF(4); len += 4;
290 nace = be32_to_cpup(p++);
292 if (nace > NFS4_ACL_MAX)
295 *acl = nfs4_acl_new(nace);
297 return nfserr_jukebox;
299 defer_free(argp, kfree, *acl);
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->data = kzalloc(dummy32 + 1, GFP_KERNEL);
423 return nfserr_jukebox;
424 label->len = dummy32;
425 defer_free(argp, kfree, label->data);
426 memcpy(label->data, buf, dummy32);
430 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
431 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
432 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
433 READ_BUF(expected_len - len);
434 else if (len != expected_len)
441 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
445 READ_BUF(sizeof(stateid_t));
446 sid->si_generation = be32_to_cpup(p++);
447 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
453 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
458 access->ac_req_access = be32_to_cpup(p++);
463 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
471 /* callback_sec_params4 */
473 nr_secflavs = be32_to_cpup(p++);
475 cbs->flavor = (u32)(-1);
477 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
479 for (i = 0; i < nr_secflavs; ++i) {
481 dummy = be32_to_cpup(p++);
484 /* Nothing to read */
485 if (cbs->flavor == (u32)(-1))
486 cbs->flavor = RPC_AUTH_NULL;
491 dummy = be32_to_cpup(p++);
494 dummy = be32_to_cpup(p++);
496 SAVEMEM(machine_name, dummy);
500 uid = be32_to_cpup(p++);
501 gid = be32_to_cpup(p++);
505 dummy = be32_to_cpup(p++);
507 if (cbs->flavor == (u32)(-1)) {
508 kuid_t kuid = make_kuid(&init_user_ns, uid);
509 kgid_t kgid = make_kgid(&init_user_ns, gid);
510 if (uid_valid(kuid) && gid_valid(kgid)) {
513 cbs->flavor = RPC_AUTH_UNIX;
515 dprintk("RPC_AUTH_UNIX with invalid"
516 "uid or gid ignoring!\n");
521 dprintk("RPC_AUTH_GSS callback secflavor "
525 dummy = be32_to_cpup(p++);
526 /* gcbp_handle_from_server */
527 dummy = be32_to_cpup(p++);
529 p += XDR_QUADLEN(dummy);
530 /* gcbp_handle_from_client */
532 dummy = be32_to_cpup(p++);
536 dprintk("Illegal callback secflavor\n");
543 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
548 bc->bc_cb_program = be32_to_cpup(p++);
549 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
554 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
558 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
559 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
560 bcts->dir = be32_to_cpup(p++);
561 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
562 * could help us figure out we should be using it. */
567 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
572 close->cl_seqid = be32_to_cpup(p++);
573 return nfsd4_decode_stateid(argp, &close->cl_stateid);
580 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
585 p = xdr_decode_hyper(p, &commit->co_offset);
586 commit->co_count = be32_to_cpup(p++);
592 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
597 create->cr_type = be32_to_cpup(p++);
598 switch (create->cr_type) {
601 create->cr_linklen = be32_to_cpup(p++);
602 READ_BUF(create->cr_linklen);
604 * The VFS will want a null-terminated string, and
605 * null-terminating in place isn't safe since this might
606 * end on a page boundary:
608 create->cr_linkname =
609 kmalloc(create->cr_linklen + 1, GFP_KERNEL);
610 if (!create->cr_linkname)
611 return nfserr_jukebox;
612 memcpy(create->cr_linkname, p, create->cr_linklen);
613 create->cr_linkname[create->cr_linklen] = '\0';
614 defer_free(argp, kfree, create->cr_linkname);
619 create->cr_specdata1 = be32_to_cpup(p++);
620 create->cr_specdata2 = be32_to_cpup(p++);
630 create->cr_namelen = be32_to_cpup(p++);
631 READ_BUF(create->cr_namelen);
632 SAVEMEM(create->cr_name, create->cr_namelen);
633 if ((status = check_filename(create->cr_name, create->cr_namelen)))
636 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
637 &create->cr_acl, &create->cr_label);
645 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
647 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
651 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
657 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
662 link->li_namelen = be32_to_cpup(p++);
663 READ_BUF(link->li_namelen);
664 SAVEMEM(link->li_name, link->li_namelen);
665 if ((status = check_filename(link->li_name, link->li_namelen)))
672 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
677 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
680 lock->lk_type = be32_to_cpup(p++);
681 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
683 lock->lk_reclaim = be32_to_cpup(p++);
684 p = xdr_decode_hyper(p, &lock->lk_offset);
685 p = xdr_decode_hyper(p, &lock->lk_length);
686 lock->lk_is_new = be32_to_cpup(p++);
688 if (lock->lk_is_new) {
690 lock->lk_new_open_seqid = be32_to_cpup(p++);
691 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
694 READ_BUF(8 + sizeof(clientid_t));
695 lock->lk_new_lock_seqid = be32_to_cpup(p++);
696 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
697 lock->lk_new_owner.len = be32_to_cpup(p++);
698 READ_BUF(lock->lk_new_owner.len);
699 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
701 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
705 lock->lk_old_lock_seqid = be32_to_cpup(p++);
712 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
717 lockt->lt_type = be32_to_cpup(p++);
718 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
720 p = xdr_decode_hyper(p, &lockt->lt_offset);
721 p = xdr_decode_hyper(p, &lockt->lt_length);
722 COPYMEM(&lockt->lt_clientid, 8);
723 lockt->lt_owner.len = be32_to_cpup(p++);
724 READ_BUF(lockt->lt_owner.len);
725 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
731 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
736 locku->lu_type = be32_to_cpup(p++);
737 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
739 locku->lu_seqid = be32_to_cpup(p++);
740 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
744 p = xdr_decode_hyper(p, &locku->lu_offset);
745 p = xdr_decode_hyper(p, &locku->lu_length);
751 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
756 lookup->lo_len = be32_to_cpup(p++);
757 READ_BUF(lookup->lo_len);
758 SAVEMEM(lookup->lo_name, lookup->lo_len);
759 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
765 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
771 w = be32_to_cpup(p++);
772 *share_access = w & NFS4_SHARE_ACCESS_MASK;
773 *deleg_want = w & NFS4_SHARE_WANT_MASK;
775 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
777 switch (w & NFS4_SHARE_ACCESS_MASK) {
778 case NFS4_SHARE_ACCESS_READ:
779 case NFS4_SHARE_ACCESS_WRITE:
780 case NFS4_SHARE_ACCESS_BOTH:
783 return nfserr_bad_xdr;
785 w &= ~NFS4_SHARE_ACCESS_MASK;
788 if (!argp->minorversion)
789 return nfserr_bad_xdr;
790 switch (w & NFS4_SHARE_WANT_MASK) {
791 case NFS4_SHARE_WANT_NO_PREFERENCE:
792 case NFS4_SHARE_WANT_READ_DELEG:
793 case NFS4_SHARE_WANT_WRITE_DELEG:
794 case NFS4_SHARE_WANT_ANY_DELEG:
795 case NFS4_SHARE_WANT_NO_DELEG:
796 case NFS4_SHARE_WANT_CANCEL:
799 return nfserr_bad_xdr;
801 w &= ~NFS4_SHARE_WANT_MASK;
805 if (!deleg_when) /* open_downgrade */
808 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
809 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
810 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
811 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
815 return nfserr_bad_xdr;
818 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
823 *x = be32_to_cpup(p++);
824 /* Note: unlinke access bits, deny bits may be zero. */
825 if (*x & ~NFS4_SHARE_DENY_BOTH)
826 return nfserr_bad_xdr;
829 return nfserr_bad_xdr;
832 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
837 o->len = be32_to_cpup(p++);
839 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
840 return nfserr_bad_xdr;
843 SAVEMEM(o->data, o->len);
846 return nfserr_bad_xdr;
850 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
855 memset(open->op_bmval, 0, sizeof(open->op_bmval));
856 open->op_iattr.ia_valid = 0;
857 open->op_openowner = NULL;
859 open->op_xdr_error = 0;
860 /* seqid, share_access, share_deny, clientid, ownerlen */
862 open->op_seqid = be32_to_cpup(p++);
863 /* decode, yet ignore deleg_when until supported */
864 status = nfsd4_decode_share_access(argp, &open->op_share_access,
865 &open->op_deleg_want, &dummy);
868 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
871 READ_BUF(sizeof(clientid_t));
872 COPYMEM(&open->op_clientid, sizeof(clientid_t));
873 status = nfsd4_decode_opaque(argp, &open->op_owner);
877 open->op_create = be32_to_cpup(p++);
878 switch (open->op_create) {
879 case NFS4_OPEN_NOCREATE:
881 case NFS4_OPEN_CREATE:
883 open->op_createmode = be32_to_cpup(p++);
884 switch (open->op_createmode) {
885 case NFS4_CREATE_UNCHECKED:
886 case NFS4_CREATE_GUARDED:
887 status = nfsd4_decode_fattr(argp, open->op_bmval,
888 &open->op_iattr, &open->op_acl, &open->op_label);
892 case NFS4_CREATE_EXCLUSIVE:
893 READ_BUF(NFS4_VERIFIER_SIZE);
894 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
896 case NFS4_CREATE_EXCLUSIVE4_1:
897 if (argp->minorversion < 1)
899 READ_BUF(NFS4_VERIFIER_SIZE);
900 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
901 status = nfsd4_decode_fattr(argp, open->op_bmval,
902 &open->op_iattr, &open->op_acl, &open->op_label);
916 open->op_claim_type = be32_to_cpup(p++);
917 switch (open->op_claim_type) {
918 case NFS4_OPEN_CLAIM_NULL:
919 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
921 open->op_fname.len = be32_to_cpup(p++);
922 READ_BUF(open->op_fname.len);
923 SAVEMEM(open->op_fname.data, open->op_fname.len);
924 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
927 case NFS4_OPEN_CLAIM_PREVIOUS:
929 open->op_delegate_type = be32_to_cpup(p++);
931 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
932 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
936 open->op_fname.len = be32_to_cpup(p++);
937 READ_BUF(open->op_fname.len);
938 SAVEMEM(open->op_fname.data, open->op_fname.len);
939 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
942 case NFS4_OPEN_CLAIM_FH:
943 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
944 if (argp->minorversion < 1)
948 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
949 if (argp->minorversion < 1)
951 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
963 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
967 if (argp->minorversion >= 1)
968 return nfserr_notsupp;
970 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
974 open_conf->oc_seqid = be32_to_cpup(p++);
980 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
984 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
988 open_down->od_seqid = be32_to_cpup(p++);
989 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
990 &open_down->od_deleg_want, NULL);
993 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1000 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1005 putfh->pf_fhlen = be32_to_cpup(p++);
1006 if (putfh->pf_fhlen > NFS4_FHSIZE)
1008 READ_BUF(putfh->pf_fhlen);
1009 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1015 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1017 if (argp->minorversion == 0)
1019 return nfserr_notsupp;
1023 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1027 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1031 p = xdr_decode_hyper(p, &read->rd_offset);
1032 read->rd_length = be32_to_cpup(p++);
1038 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1043 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1044 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1045 readdir->rd_dircount = be32_to_cpup(p++);
1046 readdir->rd_maxcount = be32_to_cpup(p++);
1047 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1054 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1059 remove->rm_namelen = be32_to_cpup(p++);
1060 READ_BUF(remove->rm_namelen);
1061 SAVEMEM(remove->rm_name, remove->rm_namelen);
1062 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1069 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1074 rename->rn_snamelen = be32_to_cpup(p++);
1075 READ_BUF(rename->rn_snamelen + 4);
1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1077 rename->rn_tnamelen = be32_to_cpup(p++);
1078 READ_BUF(rename->rn_tnamelen);
1079 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1080 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1082 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1089 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1093 if (argp->minorversion >= 1)
1094 return nfserr_notsupp;
1096 READ_BUF(sizeof(clientid_t));
1097 COPYMEM(clientid, sizeof(clientid_t));
1103 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1104 struct nfsd4_secinfo *secinfo)
1109 secinfo->si_namelen = be32_to_cpup(p++);
1110 READ_BUF(secinfo->si_namelen);
1111 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1112 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1119 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1120 struct nfsd4_secinfo_no_name *sin)
1125 sin->sin_style = be32_to_cpup(p++);
1130 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1134 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1137 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1138 &setattr->sa_acl, &setattr->sa_label);
1142 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1146 if (argp->minorversion >= 1)
1147 return nfserr_notsupp;
1149 READ_BUF(NFS4_VERIFIER_SIZE);
1150 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1152 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1154 return nfserr_bad_xdr;
1156 setclientid->se_callback_prog = be32_to_cpup(p++);
1157 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1159 READ_BUF(setclientid->se_callback_netid_len + 4);
1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1161 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1163 READ_BUF(setclientid->se_callback_addr_len + 4);
1164 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1165 setclientid->se_callback_ident = be32_to_cpup(p++);
1171 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1175 if (argp->minorversion >= 1)
1176 return nfserr_notsupp;
1178 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1179 COPYMEM(&scd_c->sc_clientid, 8);
1180 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1185 /* Also used for NVERIFY */
1187 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1191 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1194 /* For convenience's sake, we compare raw xdr'd attributes in
1195 * nfsd4_proc_verify */
1198 verify->ve_attrlen = be32_to_cpup(p++);
1199 READ_BUF(verify->ve_attrlen);
1200 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1206 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1212 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1216 p = xdr_decode_hyper(p, &write->wr_offset);
1217 write->wr_stable_how = be32_to_cpup(p++);
1218 if (write->wr_stable_how > 2)
1220 write->wr_buflen = be32_to_cpup(p++);
1222 /* Sorry .. no magic macros for this.. *
1223 * READ_BUF(write->wr_buflen);
1224 * SAVEMEM(write->wr_buf, write->wr_buflen);
1226 avail = (char*)argp->end - (char*)argp->p;
1227 if (avail + argp->pagelen < write->wr_buflen) {
1228 dprintk("NFSD: xdr error (%s:%d)\n",
1229 __FILE__, __LINE__);
1232 write->wr_head.iov_base = p;
1233 write->wr_head.iov_len = avail;
1234 write->wr_pagelist = argp->pagelist;
1236 len = XDR_QUADLEN(write->wr_buflen) << 2;
1242 pages = len >> PAGE_SHIFT;
1243 argp->pagelist += pages;
1244 argp->pagelen -= pages * PAGE_SIZE;
1245 len -= pages * PAGE_SIZE;
1247 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1249 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1251 argp->p += XDR_QUADLEN(len);
1257 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1261 if (argp->minorversion >= 1)
1262 return nfserr_notsupp;
1265 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1266 rlockowner->rl_owner.len = be32_to_cpup(p++);
1267 READ_BUF(rlockowner->rl_owner.len);
1268 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1270 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1271 return nfserr_inval;
1276 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1277 struct nfsd4_exchange_id *exid)
1282 READ_BUF(NFS4_VERIFIER_SIZE);
1283 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1285 status = nfsd4_decode_opaque(argp, &exid->clname);
1287 return nfserr_bad_xdr;
1290 exid->flags = be32_to_cpup(p++);
1292 /* Ignore state_protect4_a */
1294 exid->spa_how = be32_to_cpup(p++);
1295 switch (exid->spa_how) {
1299 /* spo_must_enforce */
1301 dummy = be32_to_cpup(p++);
1302 READ_BUF(dummy * 4);
1305 /* spo_must_allow */
1307 dummy = be32_to_cpup(p++);
1308 READ_BUF(dummy * 4);
1314 dummy = be32_to_cpup(p++);
1315 READ_BUF(dummy * 4);
1319 dummy = be32_to_cpup(p++);
1320 READ_BUF(dummy * 4);
1323 /* ssp_hash_algs<> */
1325 tmp = be32_to_cpup(p++);
1328 dummy = be32_to_cpup(p++);
1330 p += XDR_QUADLEN(dummy);
1333 /* ssp_encr_algs<> */
1335 tmp = be32_to_cpup(p++);
1338 dummy = be32_to_cpup(p++);
1340 p += XDR_QUADLEN(dummy);
1343 /* ssp_window and ssp_num_gss_handles */
1345 dummy = be32_to_cpup(p++);
1346 dummy = be32_to_cpup(p++);
1352 /* Ignore Implementation ID */
1353 READ_BUF(4); /* nfs_impl_id4 array length */
1354 dummy = be32_to_cpup(p++);
1362 dummy = be32_to_cpup(p++);
1364 p += XDR_QUADLEN(dummy);
1368 dummy = be32_to_cpup(p++);
1370 p += XDR_QUADLEN(dummy);
1380 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1381 struct nfsd4_create_session *sess)
1387 COPYMEM(&sess->clientid, 8);
1388 sess->seqid = be32_to_cpup(p++);
1389 sess->flags = be32_to_cpup(p++);
1391 /* Fore channel attrs */
1393 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1394 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1395 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1396 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1397 sess->fore_channel.maxops = be32_to_cpup(p++);
1398 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1399 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1400 if (sess->fore_channel.nr_rdma_attrs == 1) {
1402 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1403 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1404 dprintk("Too many fore channel attr bitmaps!\n");
1408 /* Back channel attrs */
1410 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1411 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1412 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1413 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1414 sess->back_channel.maxops = be32_to_cpup(p++);
1415 sess->back_channel.maxreqs = be32_to_cpup(p++);
1416 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1417 if (sess->back_channel.nr_rdma_attrs == 1) {
1419 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1420 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1421 dprintk("Too many back channel attr bitmaps!\n");
1426 sess->callback_prog = be32_to_cpup(p++);
1427 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1432 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1433 struct nfsd4_destroy_session *destroy_session)
1436 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1437 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1443 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1444 struct nfsd4_free_stateid *free_stateid)
1448 READ_BUF(sizeof(stateid_t));
1449 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1450 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1456 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1457 struct nfsd4_sequence *seq)
1461 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1462 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1463 seq->seqid = be32_to_cpup(p++);
1464 seq->slotid = be32_to_cpup(p++);
1465 seq->maxslots = be32_to_cpup(p++);
1466 seq->cachethis = be32_to_cpup(p++);
1472 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1476 struct nfsd4_test_stateid_id *stateid;
1479 test_stateid->ts_num_ids = ntohl(*p++);
1481 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1483 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1484 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1486 status = nfserrno(-ENOMEM);
1490 defer_free(argp, kfree, stateid);
1491 INIT_LIST_HEAD(&stateid->ts_id_list);
1492 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1494 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1503 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1504 status = nfserr_bad_xdr;
1508 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1513 COPYMEM(&dc->clientid, 8);
1518 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1523 rc->rca_one_fs = be32_to_cpup(p++);
1529 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1535 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1537 return nfserr_notsupp;
1540 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1542 static nfsd4_dec nfsd4_dec_ops[] = {
1543 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1544 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1545 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1546 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1547 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1548 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1549 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1550 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1551 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1552 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1553 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1554 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1555 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1556 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1557 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1558 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1559 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1560 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1561 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1562 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1563 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1564 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1565 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1566 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1567 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1568 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1569 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1570 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1571 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1572 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1573 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1574 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1575 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1576 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1577 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1578 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1579 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1581 /* new operations for NFSv4.1 */
1582 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1583 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1584 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1585 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1586 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1587 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1588 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1589 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1590 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1591 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1592 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1593 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1594 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1595 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1596 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1597 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1598 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1599 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1600 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1604 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1606 if (op->opnum < FIRST_NFS4_OP)
1608 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1610 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1612 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1618 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1621 struct nfsd4_op *op;
1622 bool cachethis = false;
1623 int auth_slack= argp->rqstp->rq_auth_slack;
1624 int max_reply = auth_slack + 8; /* opcnt, status */
1630 argp->taglen = be32_to_cpup(p++);
1631 READ_BUF(argp->taglen + 8);
1632 SAVEMEM(argp->tag, argp->taglen);
1633 argp->minorversion = be32_to_cpup(p++);
1634 argp->opcnt = be32_to_cpup(p++);
1635 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1637 if (argp->taglen > NFSD4_MAX_TAGLEN)
1639 if (argp->opcnt > 100)
1642 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1643 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1645 argp->ops = argp->iops;
1646 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1651 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1654 for (i = 0; i < argp->opcnt; i++) {
1659 op->opnum = be32_to_cpup(p++);
1661 if (nfsd4_opnum_in_range(argp, op))
1662 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1664 op->opnum = OP_ILLEGAL;
1665 op->status = nfserr_op_illegal;
1668 * We'll try to cache the result in the DRC if any one
1669 * op in the compound wants to be cached:
1671 cachethis |= nfsd4_cache_this_op(op);
1673 if (op->opnum == OP_READ) {
1675 readbytes += nfsd4_max_reply(argp->rqstp, op);
1677 max_reply += nfsd4_max_reply(argp->rqstp, op);
1684 /* Sessions make the DRC unnecessary: */
1685 if (argp->minorversion)
1687 svc_reserve(argp->rqstp, max_reply + readbytes);
1688 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1690 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1691 argp->rqstp->rq_splice_ok = false;
1696 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1698 if (IS_I_VERSION(inode)) {
1699 p = xdr_encode_hyper(p, inode->i_version);
1701 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1702 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1707 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1709 *p++ = cpu_to_be32(c->atomic);
1710 if (c->change_supported) {
1711 p = xdr_encode_hyper(p, c->before_change);
1712 p = xdr_encode_hyper(p, c->after_change);
1714 *p++ = cpu_to_be32(c->before_ctime_sec);
1715 *p++ = cpu_to_be32(c->before_ctime_nsec);
1716 *p++ = cpu_to_be32(c->after_ctime_sec);
1717 *p++ = cpu_to_be32(c->after_ctime_nsec);
1722 /* Encode as an array of strings the string given with components
1723 * separated @sep, escaped with esc_enter and esc_exit.
1725 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1726 char *components, char esc_enter,
1732 int strlen, count=0;
1733 char *str, *end, *next;
1735 dprintk("nfsd4_encode_components(%s)\n", components);
1737 pathlen_offset = xdr->buf->len;
1738 p = xdr_reserve_space(xdr, 4);
1740 return nfserr_resource;
1741 p++; /* We will fill this in with @count later */
1743 end = str = components;
1745 bool found_esc = false;
1747 /* try to parse as esc_start, ..., esc_end, sep */
1748 if (*str == esc_enter) {
1749 for (; *end && (*end != esc_exit); end++)
1750 /* find esc_exit or end of string */;
1752 if (*end && (!*next || *next == sep)) {
1759 for (; *end && (*end != sep); end++)
1760 /* find sep or end of string */;
1764 p = xdr_reserve_space(xdr, strlen + 4);
1766 return nfserr_resource;
1767 p = xdr_encode_opaque(p, str, strlen);
1774 pathlen = htonl(xdr->buf->len - pathlen_offset);
1775 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1779 /* Encode as an array of strings the string given with components
1782 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
1785 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
1789 * encode a location element of a fs_locations structure
1791 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
1792 struct nfsd4_fs_location *location)
1796 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
1800 status = nfsd4_encode_components(xdr, '/', location->path);
1807 * Encode a path in RFC3530 'pathname4' format
1809 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
1810 const struct path *root,
1811 const struct path *path)
1813 struct path cur = *path;
1815 struct dentry **components = NULL;
1816 unsigned int ncomponents = 0;
1817 __be32 err = nfserr_jukebox;
1819 dprintk("nfsd4_encode_components(");
1822 /* First walk the path up to the nfsd root, and store the
1823 * dentries/path components in an array.
1826 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1828 if (cur.dentry == cur.mnt->mnt_root) {
1829 if (follow_up(&cur))
1833 if ((ncomponents & 15) == 0) {
1834 struct dentry **new;
1835 new = krealloc(components,
1836 sizeof(*new) * (ncomponents + 16),
1842 components[ncomponents++] = cur.dentry;
1843 cur.dentry = dget_parent(cur.dentry);
1845 err = nfserr_resource;
1846 p = xdr_reserve_space(xdr, 4);
1849 *p++ = cpu_to_be32(ncomponents);
1851 while (ncomponents) {
1852 struct dentry *dentry = components[ncomponents - 1];
1855 spin_lock(&dentry->d_lock);
1856 len = dentry->d_name.len;
1857 p = xdr_reserve_space(xdr, len + 4);
1859 spin_unlock(&dentry->d_lock);
1862 p = xdr_encode_opaque(p, dentry->d_name.name, len);
1863 dprintk("/%s", dentry->d_name.name);
1864 spin_unlock(&dentry->d_lock);
1873 dput(components[--ncomponents]);
1879 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
1880 struct svc_rqst *rqstp, const struct path *path)
1882 struct svc_export *exp_ps;
1885 exp_ps = rqst_find_fsidzero_export(rqstp);
1887 return nfserrno(PTR_ERR(exp_ps));
1888 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
1894 * encode a fs_locations structure
1896 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
1897 struct svc_rqst *rqstp, struct svc_export *exp)
1902 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1904 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
1907 p = xdr_reserve_space(xdr, 4);
1909 return nfserr_resource;
1910 *p++ = cpu_to_be32(fslocs->locations_count);
1911 for (i=0; i<fslocs->locations_count; i++) {
1912 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
1919 static u32 nfs4_file_type(umode_t mode)
1921 switch (mode & S_IFMT) {
1922 case S_IFIFO: return NF4FIFO;
1923 case S_IFCHR: return NF4CHR;
1924 case S_IFDIR: return NF4DIR;
1925 case S_IFBLK: return NF4BLK;
1926 case S_IFLNK: return NF4LNK;
1927 case S_IFREG: return NF4REG;
1928 case S_IFSOCK: return NF4SOCK;
1929 default: return NF4BAD;
1933 static inline __be32
1934 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1935 struct nfs4_ace *ace)
1937 if (ace->whotype != NFS4_ACL_WHO_NAMED)
1938 return nfs4_acl_write_who(xdr, ace->whotype);
1939 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
1940 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
1942 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
1945 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
1946 FATTR4_WORD0_RDATTR_ERROR)
1947 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
1949 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
1950 static inline __be32
1951 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1952 void *context, int len)
1956 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
1958 return nfserr_resource;
1961 * For now we use a 0 here to indicate the null translation; in
1962 * the future we may place a call to translation code here.
1964 *p++ = cpu_to_be32(0); /* lfs */
1965 *p++ = cpu_to_be32(0); /* pi */
1966 p = xdr_encode_opaque(p, context, len);
1970 static inline __be32
1971 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
1972 void *context, int len)
1976 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
1978 /* As per referral draft: */
1979 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
1980 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
1981 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
1982 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
1983 *rdattr_err = NFSERR_MOVED;
1985 return nfserr_moved;
1987 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
1988 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
1993 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
1995 struct path path = exp->ex_path;
1999 while (follow_up(&path)) {
2000 if (path.dentry != path.mnt->mnt_root)
2003 err = vfs_getattr(&path, stat);
2009 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2013 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2014 struct svc_export *exp,
2015 struct dentry *dentry, u32 *bmval,
2016 struct svc_rqst *rqstp, int ignore_crossmnt)
2018 u32 bmval0 = bmval[0];
2019 u32 bmval1 = bmval[1];
2020 u32 bmval2 = bmval[2];
2022 struct svc_fh *tempfh = NULL;
2023 struct kstatfs statfs;
2025 int starting_len = xdr->buf->len;
2034 struct nfs4_acl *acl = NULL;
2035 void *context = NULL;
2037 bool contextsupport = false;
2038 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2039 u32 minorversion = resp->cstate.minorversion;
2040 struct path path = {
2041 .mnt = exp->ex_path.mnt,
2044 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2046 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2047 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2048 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2049 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2051 if (exp->ex_fslocs.migrated) {
2053 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2058 err = vfs_getattr(&path, &stat);
2061 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2062 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2063 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2064 FATTR4_WORD1_SPACE_TOTAL))) {
2065 err = vfs_statfs(&path, &statfs);
2069 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2070 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2071 status = nfserr_jukebox;
2074 fh_init(tempfh, NFS4_FHSIZE);
2075 status = fh_compose(tempfh, exp, dentry, NULL);
2080 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2081 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2082 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2083 aclsupport = (err == 0);
2084 if (bmval0 & FATTR4_WORD0_ACL) {
2085 if (err == -EOPNOTSUPP)
2086 bmval0 &= ~FATTR4_WORD0_ACL;
2087 else if (err == -EINVAL) {
2088 status = nfserr_attrnotsupp;
2090 } else if (err != 0)
2095 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2096 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) ||
2097 bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) {
2098 err = security_inode_getsecctx(dentry->d_inode,
2099 &context, &contextlen);
2100 contextsupport = (err == 0);
2101 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2102 if (err == -EOPNOTSUPP)
2103 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2108 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2111 p = xdr_reserve_space(xdr, 16);
2114 *p++ = cpu_to_be32(3);
2115 *p++ = cpu_to_be32(bmval0);
2116 *p++ = cpu_to_be32(bmval1);
2117 *p++ = cpu_to_be32(bmval2);
2118 } else if (bmval1) {
2119 p = xdr_reserve_space(xdr, 12);
2122 *p++ = cpu_to_be32(2);
2123 *p++ = cpu_to_be32(bmval0);
2124 *p++ = cpu_to_be32(bmval1);
2126 p = xdr_reserve_space(xdr, 8);
2129 *p++ = cpu_to_be32(1);
2130 *p++ = cpu_to_be32(bmval0);
2133 attrlen_offset = xdr->buf->len;
2134 p = xdr_reserve_space(xdr, 4);
2137 p++; /* to be backfilled later */
2139 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2140 u32 word0 = nfsd_suppattrs0(minorversion);
2141 u32 word1 = nfsd_suppattrs1(minorversion);
2142 u32 word2 = nfsd_suppattrs2(minorversion);
2145 word0 &= ~FATTR4_WORD0_ACL;
2146 if (!contextsupport)
2147 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2149 p = xdr_reserve_space(xdr, 12);
2152 *p++ = cpu_to_be32(2);
2153 *p++ = cpu_to_be32(word0);
2154 *p++ = cpu_to_be32(word1);
2156 p = xdr_reserve_space(xdr, 16);
2159 *p++ = cpu_to_be32(3);
2160 *p++ = cpu_to_be32(word0);
2161 *p++ = cpu_to_be32(word1);
2162 *p++ = cpu_to_be32(word2);
2165 if (bmval0 & FATTR4_WORD0_TYPE) {
2166 p = xdr_reserve_space(xdr, 4);
2169 dummy = nfs4_file_type(stat.mode);
2170 if (dummy == NF4BAD) {
2171 status = nfserr_serverfault;
2174 *p++ = cpu_to_be32(dummy);
2176 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2177 p = xdr_reserve_space(xdr, 4);
2180 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2181 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2183 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2184 NFS4_FH_VOL_RENAME);
2186 if (bmval0 & FATTR4_WORD0_CHANGE) {
2187 p = xdr_reserve_space(xdr, 8);
2190 p = encode_change(p, &stat, dentry->d_inode);
2192 if (bmval0 & FATTR4_WORD0_SIZE) {
2193 p = xdr_reserve_space(xdr, 8);
2196 p = xdr_encode_hyper(p, stat.size);
2198 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2199 p = xdr_reserve_space(xdr, 4);
2202 *p++ = cpu_to_be32(1);
2204 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2205 p = xdr_reserve_space(xdr, 4);
2208 *p++ = cpu_to_be32(1);
2210 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2211 p = xdr_reserve_space(xdr, 4);
2214 *p++ = cpu_to_be32(0);
2216 if (bmval0 & FATTR4_WORD0_FSID) {
2217 p = xdr_reserve_space(xdr, 16);
2220 if (exp->ex_fslocs.migrated) {
2221 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2222 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2223 } else switch(fsid_source(fhp)) {
2224 case FSIDSOURCE_FSID:
2225 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2226 p = xdr_encode_hyper(p, (u64)0);
2228 case FSIDSOURCE_DEV:
2229 *p++ = cpu_to_be32(0);
2230 *p++ = cpu_to_be32(MAJOR(stat.dev));
2231 *p++ = cpu_to_be32(0);
2232 *p++ = cpu_to_be32(MINOR(stat.dev));
2234 case FSIDSOURCE_UUID:
2235 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2240 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2241 p = xdr_reserve_space(xdr, 4);
2244 *p++ = cpu_to_be32(0);
2246 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2247 p = xdr_reserve_space(xdr, 4);
2250 *p++ = cpu_to_be32(nn->nfsd4_lease);
2252 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2253 p = xdr_reserve_space(xdr, 4);
2256 *p++ = cpu_to_be32(rdattr_err);
2258 if (bmval0 & FATTR4_WORD0_ACL) {
2259 struct nfs4_ace *ace;
2262 p = xdr_reserve_space(xdr, 4);
2266 *p++ = cpu_to_be32(0);
2269 p = xdr_reserve_space(xdr, 4);
2272 *p++ = cpu_to_be32(acl->naces);
2274 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2275 p = xdr_reserve_space(xdr, 4*3);
2278 *p++ = cpu_to_be32(ace->type);
2279 *p++ = cpu_to_be32(ace->flag);
2280 *p++ = cpu_to_be32(ace->access_mask &
2282 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2288 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2289 p = xdr_reserve_space(xdr, 4);
2292 *p++ = cpu_to_be32(aclsupport ?
2293 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2295 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2296 p = xdr_reserve_space(xdr, 4);
2299 *p++ = cpu_to_be32(1);
2301 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2302 p = xdr_reserve_space(xdr, 4);
2305 *p++ = cpu_to_be32(0);
2307 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2308 p = xdr_reserve_space(xdr, 4);
2311 *p++ = cpu_to_be32(1);
2313 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2314 p = xdr_reserve_space(xdr, 4);
2317 *p++ = cpu_to_be32(1);
2319 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2320 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2323 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2324 fhp->fh_handle.fh_size);
2326 if (bmval0 & FATTR4_WORD0_FILEID) {
2327 p = xdr_reserve_space(xdr, 8);
2330 p = xdr_encode_hyper(p, stat.ino);
2332 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2333 p = xdr_reserve_space(xdr, 8);
2336 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2338 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2339 p = xdr_reserve_space(xdr, 8);
2342 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2344 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2345 p = xdr_reserve_space(xdr, 8);
2348 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2350 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2351 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2355 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2356 p = xdr_reserve_space(xdr, 4);
2359 *p++ = cpu_to_be32(1);
2361 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2362 p = xdr_reserve_space(xdr, 8);
2365 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2367 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2368 p = xdr_reserve_space(xdr, 4);
2371 *p++ = cpu_to_be32(255);
2373 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2374 p = xdr_reserve_space(xdr, 4);
2377 *p++ = cpu_to_be32(statfs.f_namelen);
2379 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2380 p = xdr_reserve_space(xdr, 8);
2383 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2385 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2386 p = xdr_reserve_space(xdr, 8);
2389 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2391 if (bmval1 & FATTR4_WORD1_MODE) {
2392 p = xdr_reserve_space(xdr, 4);
2395 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2397 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2398 p = xdr_reserve_space(xdr, 4);
2401 *p++ = cpu_to_be32(1);
2403 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2404 p = xdr_reserve_space(xdr, 4);
2407 *p++ = cpu_to_be32(stat.nlink);
2409 if (bmval1 & FATTR4_WORD1_OWNER) {
2410 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2414 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2415 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2419 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2420 p = xdr_reserve_space(xdr, 8);
2423 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2424 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2426 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2427 p = xdr_reserve_space(xdr, 8);
2430 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2431 p = xdr_encode_hyper(p, dummy64);
2433 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2434 p = xdr_reserve_space(xdr, 8);
2437 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2438 p = xdr_encode_hyper(p, dummy64);
2440 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2441 p = xdr_reserve_space(xdr, 8);
2444 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2445 p = xdr_encode_hyper(p, dummy64);
2447 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2448 p = xdr_reserve_space(xdr, 8);
2451 dummy64 = (u64)stat.blocks << 9;
2452 p = xdr_encode_hyper(p, dummy64);
2454 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2455 p = xdr_reserve_space(xdr, 12);
2458 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2459 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2461 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2462 p = xdr_reserve_space(xdr, 12);
2465 *p++ = cpu_to_be32(0);
2466 *p++ = cpu_to_be32(1);
2467 *p++ = cpu_to_be32(0);
2469 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2470 p = xdr_reserve_space(xdr, 12);
2473 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2474 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2476 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2477 p = xdr_reserve_space(xdr, 12);
2480 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2481 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2483 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2484 p = xdr_reserve_space(xdr, 8);
2488 * Get parent's attributes if not ignoring crossmount
2489 * and this is the root of a cross-mounted filesystem.
2491 if (ignore_crossmnt == 0 &&
2492 dentry == exp->ex_path.mnt->mnt_root)
2493 get_parent_attributes(exp, &stat);
2494 p = xdr_encode_hyper(p, stat.ino);
2496 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2497 status = nfsd4_encode_security_label(xdr, rqstp, context,
2502 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2503 p = xdr_reserve_space(xdr, 16);
2506 *p++ = cpu_to_be32(3);
2507 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2508 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2509 *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2512 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2513 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2517 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2519 security_release_secctx(context, contextlen);
2520 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2527 xdr_truncate_encode(xdr, starting_len);
2530 status = nfserrno(err);
2533 status = nfserr_resource;
2537 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2538 struct xdr_buf *buf, __be32 *p, int bytes)
2540 xdr->scratch.iov_len = 0;
2541 memset(buf, 0, sizeof(struct xdr_buf));
2542 buf->head[0].iov_base = p;
2543 buf->head[0].iov_len = 0;
2546 xdr->iov = buf->head;
2548 xdr->end = (void *)p + bytes;
2549 buf->buflen = bytes;
2552 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2553 struct svc_fh *fhp, struct svc_export *exp,
2554 struct dentry *dentry, u32 *bmval,
2555 struct svc_rqst *rqstp, int ignore_crossmnt)
2557 struct xdr_buf dummy;
2558 struct xdr_stream xdr;
2561 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2562 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2568 static inline int attributes_need_mount(u32 *bmval)
2570 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2572 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2578 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2579 const char *name, int namlen)
2581 struct svc_export *exp = cd->rd_fhp->fh_export;
2582 struct dentry *dentry;
2584 int ignore_crossmnt = 0;
2586 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2588 return nfserrno(PTR_ERR(dentry));
2589 if (!dentry->d_inode) {
2591 * nfsd_buffered_readdir drops the i_mutex between
2592 * readdir and calling this callback, leaving a window
2593 * where this directory entry could have gone away.
2596 return nfserr_noent;
2601 * In the case of a mountpoint, the client may be asking for
2602 * attributes that are only properties of the underlying filesystem
2603 * as opposed to the cross-mounted file system. In such a case,
2604 * we will not follow the cross mount and will fill the attribtutes
2605 * directly from the mountpoint dentry.
2607 if (nfsd_mountpoint(dentry, exp)) {
2610 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2611 && !attributes_need_mount(cd->rd_bmval)) {
2612 ignore_crossmnt = 1;
2616 * Why the heck aren't we just using nfsd_lookup??
2617 * Different "."/".." handling? Something else?
2618 * At least, add a comment here to explain....
2620 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2622 nfserr = nfserrno(err);
2625 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2631 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2632 cd->rd_rqstp, ignore_crossmnt);
2640 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2644 p = xdr_reserve_space(xdr, 20);
2648 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2649 *p++ = htonl(0); /* bmval1 */
2651 *p++ = htonl(4); /* attribute length */
2652 *p++ = nfserr; /* no htonl */
2657 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2658 loff_t offset, u64 ino, unsigned int d_type)
2660 struct readdir_cd *ccd = ccdv;
2661 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2662 struct xdr_stream *xdr = cd->xdr;
2663 int start_offset = xdr->buf->len;
2666 __be32 nfserr = nfserr_toosmall;
2670 /* In nfsv4, "." and ".." never make it onto the wire.. */
2671 if (name && isdotent(name, namlen)) {
2672 cd->common.err = nfs_ok;
2676 if (cd->cookie_offset) {
2677 wire_offset = cpu_to_be64(offset);
2678 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2682 p = xdr_reserve_space(xdr, 4);
2685 *p++ = xdr_one; /* mark entry present */
2686 cookie_offset = xdr->buf->len;
2687 p = xdr_reserve_space(xdr, 3*4 + namlen);
2690 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2691 p = xdr_encode_array(p, name, namlen); /* name length & name */
2693 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2697 case nfserr_resource:
2698 nfserr = nfserr_toosmall;
2701 xdr_truncate_encode(xdr, start_offset);
2705 * If the client requested the RDATTR_ERROR attribute,
2706 * we stuff the error code into this attribute
2707 * and continue. If this attribute was not requested,
2708 * then in accordance with the spec, we fail the
2709 * entire READDIR operation(!)
2711 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2713 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2715 nfserr = nfserr_toosmall;
2719 nfserr = nfserr_toosmall;
2720 entry_bytes = xdr->buf->len - start_offset;
2721 if (entry_bytes > cd->rd_maxcount)
2723 cd->rd_maxcount -= entry_bytes;
2724 if (!cd->rd_dircount)
2727 cd->cookie_offset = cookie_offset;
2729 cd->common.err = nfs_ok;
2732 xdr_truncate_encode(xdr, start_offset);
2733 cd->common.err = nfserr;
2738 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
2742 p = xdr_reserve_space(xdr, sizeof(stateid_t));
2744 return nfserr_resource;
2745 *p++ = cpu_to_be32(sid->si_generation);
2746 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
2747 sizeof(stateid_opaque_t));
2752 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2754 struct xdr_stream *xdr = &resp->xdr;
2758 p = xdr_reserve_space(xdr, 8);
2760 return nfserr_resource;
2761 *p++ = cpu_to_be32(access->ac_supported);
2762 *p++ = cpu_to_be32(access->ac_resp_access);
2767 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2769 struct xdr_stream *xdr = &resp->xdr;
2773 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
2775 return nfserr_resource;
2776 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
2777 NFS4_MAX_SESSIONID_LEN);
2778 *p++ = cpu_to_be32(bcts->dir);
2779 /* Sorry, we do not yet support RDMA over 4.1: */
2780 *p++ = cpu_to_be32(0);
2786 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2788 struct xdr_stream *xdr = &resp->xdr;
2791 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
2798 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2800 struct xdr_stream *xdr = &resp->xdr;
2804 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
2806 return nfserr_resource;
2807 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
2808 NFS4_VERIFIER_SIZE);
2814 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2816 struct xdr_stream *xdr = &resp->xdr;
2820 p = xdr_reserve_space(xdr, 32);
2822 return nfserr_resource;
2823 p = encode_cinfo(p, &create->cr_cinfo);
2824 *p++ = cpu_to_be32(2);
2825 *p++ = cpu_to_be32(create->cr_bmval[0]);
2826 *p++ = cpu_to_be32(create->cr_bmval[1]);
2832 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2834 struct svc_fh *fhp = getattr->ga_fhp;
2835 struct xdr_stream *xdr = &resp->xdr;
2840 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
2847 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2849 struct xdr_stream *xdr = &resp->xdr;
2850 struct svc_fh *fhp = *fhpp;
2855 len = fhp->fh_handle.fh_size;
2856 p = xdr_reserve_space(xdr, len + 4);
2858 return nfserr_resource;
2859 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
2865 * Including all fields other than the name, a LOCK4denied structure requires
2866 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2869 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
2871 struct xdr_netobj *conf = &ld->ld_owner;
2875 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
2878 * Don't fail to return the result just because we can't
2879 * return the conflicting open:
2886 return nfserr_resource;
2888 p = xdr_encode_hyper(p, ld->ld_start);
2889 p = xdr_encode_hyper(p, ld->ld_length);
2890 *p++ = cpu_to_be32(ld->ld_type);
2892 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
2893 p = xdr_encode_opaque(p, conf->data, conf->len);
2894 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2895 p = xdr_encode_hyper(p, (u64)0); /* clientid */
2896 *p++ = cpu_to_be32(0); /* length of owner name */
2898 return nfserr_denied;
2902 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2904 struct xdr_stream *xdr = &resp->xdr;
2907 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
2908 else if (nfserr == nfserr_denied)
2909 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
2910 kfree(lock->lk_denied.ld_owner.data);
2915 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2917 struct xdr_stream *xdr = &resp->xdr;
2919 if (nfserr == nfserr_denied)
2920 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
2925 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2927 struct xdr_stream *xdr = &resp->xdr;
2930 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
2937 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2939 struct xdr_stream *xdr = &resp->xdr;
2943 p = xdr_reserve_space(xdr, 20);
2945 return nfserr_resource;
2946 p = encode_cinfo(p, &link->li_cinfo);
2953 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2955 struct xdr_stream *xdr = &resp->xdr;
2961 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
2964 p = xdr_reserve_space(xdr, 40);
2966 return nfserr_resource;
2967 p = encode_cinfo(p, &open->op_cinfo);
2968 *p++ = cpu_to_be32(open->op_rflags);
2969 *p++ = cpu_to_be32(2);
2970 *p++ = cpu_to_be32(open->op_bmval[0]);
2971 *p++ = cpu_to_be32(open->op_bmval[1]);
2972 *p++ = cpu_to_be32(open->op_delegate_type);
2974 switch (open->op_delegate_type) {
2975 case NFS4_OPEN_DELEGATE_NONE:
2977 case NFS4_OPEN_DELEGATE_READ:
2978 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2981 p = xdr_reserve_space(xdr, 20);
2983 return nfserr_resource;
2984 *p++ = cpu_to_be32(open->op_recall);
2987 * TODO: ACE's in delegations
2989 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2990 *p++ = cpu_to_be32(0);
2991 *p++ = cpu_to_be32(0);
2992 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
2994 case NFS4_OPEN_DELEGATE_WRITE:
2995 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
2998 p = xdr_reserve_space(xdr, 32);
3000 return nfserr_resource;
3001 *p++ = cpu_to_be32(0);
3004 * TODO: space_limit's in delegations
3006 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3007 *p++ = cpu_to_be32(~(u32)0);
3008 *p++ = cpu_to_be32(~(u32)0);
3011 * TODO: ACE's in delegations
3013 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3014 *p++ = cpu_to_be32(0);
3015 *p++ = cpu_to_be32(0);
3016 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3018 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3019 switch (open->op_why_no_deleg) {
3020 case WND4_CONTENTION:
3022 p = xdr_reserve_space(xdr, 8);
3024 return nfserr_resource;
3025 *p++ = cpu_to_be32(open->op_why_no_deleg);
3026 /* deleg signaling not supported yet: */
3027 *p++ = cpu_to_be32(0);
3030 p = xdr_reserve_space(xdr, 4);
3032 return nfserr_resource;
3033 *p++ = cpu_to_be32(open->op_why_no_deleg);
3039 /* XXX save filehandle here */
3045 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3047 struct xdr_stream *xdr = &resp->xdr;
3050 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3056 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3058 struct xdr_stream *xdr = &resp->xdr;
3061 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3066 static __be32 nfsd4_encode_splice_read(
3067 struct nfsd4_compoundres *resp,
3068 struct nfsd4_read *read,
3069 struct file *file, unsigned long maxcount)
3071 struct xdr_stream *xdr = &resp->xdr;
3072 struct xdr_buf *buf = xdr->buf;
3076 __be32 *p = xdr->p - 2;
3079 * Don't inline pages unless we know there's room for eof,
3080 * count, and possible padding:
3082 if (xdr->end - xdr->p < 3)
3083 return nfserr_resource;
3085 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3086 read->rd_offset, &maxcount);
3089 * nfsd_splice_actor may have already messed with the
3090 * page length; reset it so as not to confuse
3091 * xdr_truncate_encode:
3097 eof = (read->rd_offset + maxcount >=
3098 read->rd_fhp->fh_dentry->d_inode->i_size);
3100 *(p++) = htonl(eof);
3101 *(p++) = htonl(maxcount);
3103 buf->page_len = maxcount;
3104 buf->len += maxcount;
3105 xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE;
3107 /* Use rest of head for padding and remaining ops: */
3108 buf->tail[0].iov_base = xdr->p;
3109 buf->tail[0].iov_len = 0;
3110 xdr->iov = buf->tail;
3112 int pad = 4 - (maxcount&3);
3116 buf->tail[0].iov_base += maxcount&3;
3117 buf->tail[0].iov_len = pad;
3121 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3122 buf->buflen - buf->len);
3123 buf->buflen = buf->len + space_left;
3124 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3129 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3130 struct nfsd4_read *read,
3131 struct file *file, unsigned long maxcount)
3133 struct xdr_stream *xdr = &resp->xdr;
3136 int starting_len = xdr->buf->len - 8;
3148 thislen = (void *)xdr->end - (void *)xdr->p;
3151 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3153 resp->rqstp->rq_vec[v].iov_base = p;
3154 resp->rqstp->rq_vec[v].iov_len = thislen;
3159 thislen = min_t(long, len, PAGE_SIZE);
3160 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3162 resp->rqstp->rq_vec[v].iov_base = p;
3163 resp->rqstp->rq_vec[v].iov_len = thislen;
3169 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3170 read->rd_vlen, &maxcount);
3173 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3175 eof = (read->rd_offset + maxcount >=
3176 read->rd_fhp->fh_dentry->d_inode->i_size);
3179 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3180 tmp = htonl(maxcount);
3181 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3183 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3184 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3191 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3192 struct nfsd4_read *read)
3194 unsigned long maxcount;
3195 struct xdr_stream *xdr = &resp->xdr;
3196 struct file *file = read->rd_filp;
3197 int starting_len = xdr->buf->len;
3205 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3207 WARN_ON_ONCE(resp->rqstp->rq_splice_ok);
3208 return nfserr_resource;
3210 if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) {
3212 return nfserr_resource;
3214 xdr_commit_encode(xdr);
3216 maxcount = svc_max_payload(resp->rqstp);
3217 if (maxcount > xdr->buf->buflen - xdr->buf->len)
3218 maxcount = xdr->buf->buflen - xdr->buf->len;
3219 if (maxcount > read->rd_length)
3220 maxcount = read->rd_length;
3222 if (!read->rd_filp) {
3223 err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp,
3229 if (file->f_op->splice_read && resp->rqstp->rq_splice_ok)
3230 err = nfsd4_encode_splice_read(resp, read, file, maxcount);
3232 err = nfsd4_encode_readv(resp, read, file, maxcount);
3235 nfsd_put_tmp_read_open(file, ra);
3239 xdr_truncate_encode(xdr, starting_len);
3244 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3249 struct xdr_stream *xdr = &resp->xdr;
3250 int length_offset = xdr->buf->len;
3256 p = xdr_reserve_space(xdr, 4);
3258 return nfserr_resource;
3259 maxcount = PAGE_SIZE;
3261 p = xdr_reserve_space(xdr, maxcount);
3263 return nfserr_resource;
3265 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3266 * if they would overflow the buffer. Is this kosher in NFSv4? If
3267 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3268 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3270 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3271 (char *)p, &maxcount);
3272 if (nfserr == nfserr_isdir)
3273 nfserr = nfserr_inval;
3275 xdr_truncate_encode(xdr, length_offset);
3279 wire_count = htonl(maxcount);
3280 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3281 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3283 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3284 &zero, 4 - (maxcount&3));
3289 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3295 struct xdr_stream *xdr = &resp->xdr;
3296 int starting_len = xdr->buf->len;
3302 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3304 return nfserr_resource;
3306 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3307 *p++ = cpu_to_be32(0);
3308 *p++ = cpu_to_be32(0);
3309 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3310 - (char *)resp->xdr.buf->head[0].iov_base;
3313 * Number of bytes left for directory entries allowing for the
3314 * final 8 bytes of the readdir and a following failed op:
3316 bytes_left = xdr->buf->buflen - xdr->buf->len
3317 - COMPOUND_ERR_SLACK_SPACE - 8;
3318 if (bytes_left < 0) {
3319 nfserr = nfserr_resource;
3322 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3324 * Note the rfc defines rd_maxcount as the size of the
3325 * READDIR4resok structure, which includes the verifier above
3326 * and the 8 bytes encoded at the end of this function:
3328 if (maxcount < 16) {
3329 nfserr = nfserr_toosmall;
3332 maxcount = min_t(int, maxcount-16, bytes_left);
3335 readdir->rd_maxcount = maxcount;
3336 readdir->common.err = 0;
3337 readdir->cookie_offset = 0;
3339 offset = readdir->rd_cookie;
3340 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3342 &readdir->common, nfsd4_encode_dirent);
3343 if (nfserr == nfs_ok &&
3344 readdir->common.err == nfserr_toosmall &&
3345 xdr->buf->len == starting_len + 8) {
3346 /* nothing encoded; which limit did we hit?: */
3347 if (maxcount - 16 < bytes_left)
3348 /* It was the fault of rd_maxcount: */
3349 nfserr = nfserr_toosmall;
3351 /* We ran out of buffer space: */
3352 nfserr = nfserr_resource;
3357 if (readdir->cookie_offset) {
3358 wire_offset = cpu_to_be64(offset);
3359 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3363 p = xdr_reserve_space(xdr, 8);
3368 *p++ = 0; /* no more entries */
3369 *p++ = htonl(readdir->common.err == nfserr_eof);
3373 xdr_truncate_encode(xdr, starting_len);
3378 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3380 struct xdr_stream *xdr = &resp->xdr;
3384 p = xdr_reserve_space(xdr, 20);
3386 return nfserr_resource;
3387 p = encode_cinfo(p, &remove->rm_cinfo);
3393 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3395 struct xdr_stream *xdr = &resp->xdr;
3399 p = xdr_reserve_space(xdr, 40);
3401 return nfserr_resource;
3402 p = encode_cinfo(p, &rename->rn_sinfo);
3403 p = encode_cinfo(p, &rename->rn_tinfo);
3409 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3410 __be32 nfserr, struct svc_export *exp)
3412 u32 i, nflavs, supported;
3413 struct exp_flavor_info *flavs;
3414 struct exp_flavor_info def_flavs[2];
3415 __be32 *p, *flavorsp;
3416 static bool report = true;
3420 nfserr = nfserr_resource;
3421 if (exp->ex_nflavors) {
3422 flavs = exp->ex_flavors;
3423 nflavs = exp->ex_nflavors;
3424 } else { /* Handling of some defaults in absence of real secinfo: */
3426 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3428 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3429 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3430 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3432 flavs[0].pseudoflavor
3433 = svcauth_gss_flavor(exp->ex_client);
3436 flavs[0].pseudoflavor
3437 = exp->ex_client->flavour->flavour;
3442 p = xdr_reserve_space(xdr, 4);
3445 flavorsp = p++; /* to be backfilled later */
3447 for (i = 0; i < nflavs; i++) {
3448 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3449 struct rpcsec_gss_info info;
3451 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3453 p = xdr_reserve_space(xdr, 4 + 4 +
3454 XDR_LEN(info.oid.len) + 4 + 4);
3457 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3458 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3459 *p++ = cpu_to_be32(info.qop);
3460 *p++ = cpu_to_be32(info.service);
3461 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3463 p = xdr_reserve_space(xdr, 4);
3466 *p++ = cpu_to_be32(pf);
3469 pr_warn("NFS: SECINFO: security flavor %u "
3470 "is not supported\n", pf);
3474 if (nflavs != supported)
3476 *flavorsp = htonl(supported);
3485 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3486 struct nfsd4_secinfo *secinfo)
3488 struct xdr_stream *xdr = &resp->xdr;
3490 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3494 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3495 struct nfsd4_secinfo_no_name *secinfo)
3497 struct xdr_stream *xdr = &resp->xdr;
3499 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3503 * The SETATTR encode routine is special -- it always encodes a bitmap,
3504 * regardless of the error status.
3507 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3509 struct xdr_stream *xdr = &resp->xdr;
3512 p = xdr_reserve_space(xdr, 16);
3514 return nfserr_resource;
3516 *p++ = cpu_to_be32(3);
3517 *p++ = cpu_to_be32(0);
3518 *p++ = cpu_to_be32(0);
3519 *p++ = cpu_to_be32(0);
3522 *p++ = cpu_to_be32(3);
3523 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3524 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3525 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3531 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3533 struct xdr_stream *xdr = &resp->xdr;
3537 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3539 return nfserr_resource;
3540 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3541 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3542 NFS4_VERIFIER_SIZE);
3544 else if (nfserr == nfserr_clid_inuse) {
3545 p = xdr_reserve_space(xdr, 8);
3547 return nfserr_resource;
3548 *p++ = cpu_to_be32(0);
3549 *p++ = cpu_to_be32(0);
3555 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3557 struct xdr_stream *xdr = &resp->xdr;
3561 p = xdr_reserve_space(xdr, 16);
3563 return nfserr_resource;
3564 *p++ = cpu_to_be32(write->wr_bytes_written);
3565 *p++ = cpu_to_be32(write->wr_how_written);
3566 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3567 NFS4_VERIFIER_SIZE);
3572 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3573 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3574 1 << (OP_EXCHANGE_ID - 32) |
3575 1 << (OP_CREATE_SESSION - 32) |
3576 1 << (OP_DESTROY_SESSION - 32) |
3577 1 << (OP_DESTROY_CLIENTID - 32)
3581 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3582 struct nfsd4_exchange_id *exid)
3584 struct xdr_stream *xdr = &resp->xdr;
3589 int server_scope_sz;
3590 uint64_t minor_id = 0;
3595 major_id = utsname()->nodename;
3596 major_id_sz = strlen(major_id);
3597 server_scope = utsname()->nodename;
3598 server_scope_sz = strlen(server_scope);
3600 p = xdr_reserve_space(xdr,
3601 8 /* eir_clientid */ +
3602 4 /* eir_sequenceid */ +
3606 return nfserr_resource;
3608 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3609 *p++ = cpu_to_be32(exid->seqid);
3610 *p++ = cpu_to_be32(exid->flags);
3612 *p++ = cpu_to_be32(exid->spa_how);
3614 switch (exid->spa_how) {
3618 /* spo_must_enforce, spo_must_allow */
3619 p = xdr_reserve_space(xdr, 16);
3621 return nfserr_resource;
3623 /* spo_must_enforce bitmap: */
3624 *p++ = cpu_to_be32(2);
3625 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3626 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3627 /* empty spo_must_allow bitmap: */
3628 *p++ = cpu_to_be32(0);
3635 p = xdr_reserve_space(xdr,
3636 8 /* so_minor_id */ +
3637 4 /* so_major_id.len */ +
3638 (XDR_QUADLEN(major_id_sz) * 4) +
3639 4 /* eir_server_scope.len */ +
3640 (XDR_QUADLEN(server_scope_sz) * 4) +
3641 4 /* eir_server_impl_id.count (0) */);
3643 return nfserr_resource;
3645 /* The server_owner struct */
3646 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3648 p = xdr_encode_opaque(p, major_id, major_id_sz);
3651 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3653 /* Implementation id */
3654 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3659 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3660 struct nfsd4_create_session *sess)
3662 struct xdr_stream *xdr = &resp->xdr;
3668 p = xdr_reserve_space(xdr, 24);
3670 return nfserr_resource;
3671 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3672 NFS4_MAX_SESSIONID_LEN);
3673 *p++ = cpu_to_be32(sess->seqid);
3674 *p++ = cpu_to_be32(sess->flags);
3676 p = xdr_reserve_space(xdr, 28);
3678 return nfserr_resource;
3679 *p++ = cpu_to_be32(0); /* headerpadsz */
3680 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3681 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3682 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3683 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3684 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3685 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3687 if (sess->fore_channel.nr_rdma_attrs) {
3688 p = xdr_reserve_space(xdr, 4);
3690 return nfserr_resource;
3691 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3694 p = xdr_reserve_space(xdr, 28);
3696 return nfserr_resource;
3697 *p++ = cpu_to_be32(0); /* headerpadsz */
3698 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3699 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3700 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3701 *p++ = cpu_to_be32(sess->back_channel.maxops);
3702 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3703 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3705 if (sess->back_channel.nr_rdma_attrs) {
3706 p = xdr_reserve_space(xdr, 4);
3708 return nfserr_resource;
3709 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
3715 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3716 struct nfsd4_sequence *seq)
3718 struct xdr_stream *xdr = &resp->xdr;
3724 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
3726 return nfserr_resource;
3727 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
3728 NFS4_MAX_SESSIONID_LEN);
3729 *p++ = cpu_to_be32(seq->seqid);
3730 *p++ = cpu_to_be32(seq->slotid);
3731 /* Note slotid's are numbered from zero: */
3732 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
3733 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
3734 *p++ = cpu_to_be32(seq->status_flags);
3736 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
3741 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3742 struct nfsd4_test_stateid *test_stateid)
3744 struct xdr_stream *xdr = &resp->xdr;
3745 struct nfsd4_test_stateid_id *stateid, *next;
3751 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
3753 return nfserr_resource;
3754 *p++ = htonl(test_stateid->ts_num_ids);
3756 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3757 *p++ = stateid->ts_id_status;
3764 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3769 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3772 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3773 * since we don't need to filter out obsolete ops as this is
3774 * done in the decoding phase.
3776 static nfsd4_enc nfsd4_enc_ops[] = {
3777 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3778 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3779 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3780 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3781 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3782 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3783 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3784 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3785 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3786 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3787 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3788 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3789 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3790 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3791 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3792 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3793 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3794 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3795 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3796 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3797 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3798 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3799 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3800 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3801 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3802 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3803 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3804 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3805 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3806 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3807 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3808 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3809 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3810 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3811 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3812 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3813 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3815 /* NFSv4.1 operations */
3816 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3817 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3818 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3819 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3820 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
3821 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
3822 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3823 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3824 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3825 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3826 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3827 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3828 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3829 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3830 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3831 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3832 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3833 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3834 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3838 * Calculate whether we still have space to encode repsize bytes.
3839 * There are two considerations:
3840 * - For NFS versions >=4.1, the size of the reply must stay within
3842 * - For all NFS versions, we must stay within limited preallocated
3845 * This is called before the operation is processed, so can only provide
3846 * an upper estimate. For some nonidempotent operations (such as
3847 * getattr), it's not necessarily a problem if that estimate is wrong,
3848 * as we can fail it after processing without significant side effects.
3850 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
3852 struct xdr_buf *buf = &resp->rqstp->rq_res;
3853 struct nfsd4_slot *slot = resp->cstate.slot;
3855 if (buf->len + respsize <= buf->buflen)
3857 if (!nfsd4_has_session(&resp->cstate))
3858 return nfserr_resource;
3859 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
3861 return nfserr_rep_too_big_to_cache;
3863 return nfserr_rep_too_big;
3867 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3869 struct xdr_stream *xdr = &resp->xdr;
3870 struct nfs4_stateowner *so = resp->cstate.replay_owner;
3871 struct svc_rqst *rqstp = resp->rqstp;
3872 int post_err_offset;
3876 p = xdr_reserve_space(xdr, 8);
3881 *p++ = cpu_to_be32(op->opnum);
3882 post_err_offset = xdr->buf->len;
3884 if (op->opnum == OP_ILLEGAL)
3886 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3887 !nfsd4_enc_ops[op->opnum]);
3888 encoder = nfsd4_enc_ops[op->opnum];
3889 op->status = encoder(resp, op->status, &op->u);
3890 xdr_commit_encode(xdr);
3892 /* nfsd4_check_resp_size guarantees enough room for error status */
3894 int space_needed = 0;
3895 if (!nfsd4_last_compound_op(rqstp))
3896 space_needed = COMPOUND_ERR_SLACK_SPACE;
3897 op->status = nfsd4_check_resp_size(resp, space_needed);
3899 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
3900 struct nfsd4_slot *slot = resp->cstate.slot;
3902 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
3903 op->status = nfserr_rep_too_big_to_cache;
3905 op->status = nfserr_rep_too_big;
3907 if (op->status == nfserr_resource ||
3908 op->status == nfserr_rep_too_big ||
3909 op->status == nfserr_rep_too_big_to_cache) {
3911 * The operation may have already been encoded or
3912 * partially encoded. No op returns anything additional
3913 * in the case of one of these three errors, so we can
3914 * just truncate back to after the status. But it's a
3915 * bug if we had to do this on a non-idempotent op:
3917 warn_on_nonidempotent_op(op);
3918 xdr_truncate_encode(xdr, post_err_offset);
3921 int len = xdr->buf->len - post_err_offset;
3923 so->so_replay.rp_status = op->status;
3924 so->so_replay.rp_buflen = len;
3925 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
3926 so->so_replay.rp_buf, len);
3929 /* Note that op->status is already in network byte order: */
3930 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
3934 * Encode the reply stored in the stateowner reply cache
3936 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3937 * previously sent already encoded operation.
3939 * called with nfs4_lock_state() held
3942 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
3945 struct nfs4_replay *rp = op->replay;
3949 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
3954 *p++ = cpu_to_be32(op->opnum);
3955 *p++ = rp->rp_status; /* already xdr'ed */
3957 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
3961 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3963 return xdr_ressize_check(rqstp, p);
3966 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3968 struct svc_rqst *rqstp = rq;
3969 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3971 if (args->ops != args->iops) {
3973 args->ops = args->iops;
3977 while (args->to_free) {
3978 struct tmpbuf *tb = args->to_free;
3979 args->to_free = tb->next;
3980 tb->release(tb->buf);
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 nfsd4_compound_state *cs = &resp->cstate;
4014 struct xdr_buf *buf = resp->xdr.buf;
4016 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4017 buf->tail[0].iov_len);
4019 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4022 *p++ = htonl(resp->taglen);
4023 memcpy(p, resp->tag, resp->taglen);
4024 p += XDR_QUADLEN(resp->taglen);
4025 *p++ = htonl(resp->opcnt);
4027 if (nfsd4_has_session(cs)) {
4028 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
4029 struct nfs4_client *clp = cs->session->se_client;
4030 if (cs->status != nfserr_replay_cache) {
4031 nfsd4_store_cache_entry(resp);
4032 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
4034 /* Renew the clientid on success and on replay */
4035 spin_lock(&nn->client_lock);
4036 nfsd4_put_session(cs->session);
4037 spin_unlock(&nn->client_lock);
4038 put_client_renew(clp);