2 * Server-side XDR for NFSv4
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/statfs.h>
40 #include <linux/utsname.h>
41 #include <linux/pagemap.h>
42 #include <linux/sunrpc/svcauth_gss.h>
53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54 #include <linux/security.h>
58 #define NFSDDBG_FACILITY NFSDDBG_XDR
60 const u32 nfsd_suppattrs[3][3] = {
61 {NFSD4_SUPPORTED_ATTRS_WORD0,
62 NFSD4_SUPPORTED_ATTRS_WORD1,
63 NFSD4_SUPPORTED_ATTRS_WORD2},
65 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
66 NFSD4_1_SUPPORTED_ATTRS_WORD1,
67 NFSD4_1_SUPPORTED_ATTRS_WORD2},
69 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
70 NFSD4_1_SUPPORTED_ATTRS_WORD1,
71 NFSD4_2_SUPPORTED_ATTRS_WORD2},
75 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
76 * directory in order to indicate to the client that a filesystem boundary is present
77 * We use a fixed fsid for a referral
79 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
80 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
83 check_filename(char *str, int len)
89 if (isdotent(str, len))
90 return nfserr_badname;
91 for (i = 0; i < len; i++)
93 return nfserr_badname;
100 #define DECODE_TAIL \
105 dprintk("NFSD: xdr error (%s:%d)\n", \
106 __FILE__, __LINE__); \
107 status = nfserr_bad_xdr; \
110 #define READMEM(x,nbytes) do { \
112 p += XDR_QUADLEN(nbytes); \
114 #define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
118 dprintk("NFSD: xdr error (%s:%d)\n", \
119 __FILE__, __LINE__); \
122 p += XDR_QUADLEN(nbytes); \
124 #define COPYMEM(x,nbytes) do { \
125 memcpy((x), p, nbytes); \
126 p += XDR_QUADLEN(nbytes); \
129 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
130 #define READ_BUF(nbytes) do { \
131 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
133 argp->p += XDR_QUADLEN(nbytes); \
134 } else if (!(p = read_buf(argp, nbytes))) { \
135 dprintk("NFSD: xdr error (%s:%d)\n", \
136 __FILE__, __LINE__); \
141 static void next_decode_page(struct nfsd4_compoundargs *argp)
143 argp->p = page_address(argp->pagelist[0]);
145 if (argp->pagelen < PAGE_SIZE) {
146 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
149 argp->end = argp->p + (PAGE_SIZE>>2);
150 argp->pagelen -= PAGE_SIZE;
154 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
156 /* We want more bytes than seem to be available.
157 * Maybe we need a new page, maybe we have just run out
159 unsigned int avail = (char *)argp->end - (char *)argp->p;
162 if (argp->pagelen == 0) {
163 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
167 avail = vec->iov_len;
168 argp->p = vec->iov_base;
169 argp->end = vec->iov_base + avail;
176 argp->p += XDR_QUADLEN(nbytes);
180 if (avail + argp->pagelen < nbytes)
182 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
184 /* ok, we can do it with the current plus the next page */
185 if (nbytes <= sizeof(argp->tmp))
189 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
195 * The following memcpy is safe because read_buf is always
196 * called with nbytes > avail, and the two cases above both
197 * guarantee p points to at least nbytes bytes.
199 memcpy(p, argp->p, avail);
200 next_decode_page(argp);
201 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
202 argp->p += XDR_QUADLEN(nbytes - avail);
206 static int zero_clientid(clientid_t *clid)
208 return (clid->cl_boot == 0) && (clid->cl_id == 0);
212 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
213 * @argp: NFSv4 compound argument structure
214 * @p: pointer to be freed (with kfree())
216 * Marks @p to be freed when processing the compound operation
217 * described in @argp finishes.
220 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
222 struct svcxdr_tmpbuf *tb;
224 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
227 tb->next = argp->to_free;
233 * For xdr strings that need to be passed to other kernel api's
234 * as null-terminated strings.
236 * Note null-terminating in place usually isn't safe since the
237 * buffer might end on a page boundary.
240 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
242 char *p = svcxdr_tmpalloc(argp, len + 1);
252 * savemem - duplicate a chunk of memory for later processing
253 * @argp: NFSv4 compound argument structure to be freed with
254 * @p: pointer to be duplicated
255 * @nbytes: length to be duplicated
257 * Returns a pointer to a copy of @nbytes bytes of memory at @p
258 * that are preserved until processing of the NFSv4 compound
259 * operation described by @argp finishes.
261 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
265 ret = svcxdr_tmpalloc(argp, nbytes);
268 memcpy(ret, p, nbytes);
273 * We require the high 32 bits of 'seconds' to be 0, and
274 * we ignore all 32 bits of 'nseconds'.
277 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
283 p = xdr_decode_hyper(p, &sec);
285 tv->tv_nsec = be32_to_cpup(p++);
286 if (tv->tv_nsec >= (u32)1000000000)
293 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
303 bmlen = be32_to_cpup(p++);
307 READ_BUF(bmlen << 2);
309 bmval[0] = be32_to_cpup(p++);
311 bmval[1] = be32_to_cpup(p++);
313 bmval[2] = be32_to_cpup(p++);
319 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
320 struct iattr *iattr, struct nfs4_acl **acl,
321 struct xdr_netobj *label, int *umask)
323 int expected_len, len = 0;
329 if ((status = nfsd4_decode_bitmap(argp, bmval)))
332 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
333 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
334 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
335 if (nfsd_attrs_supported(argp->minorversion, bmval))
337 return nfserr_attrnotsupp;
341 expected_len = be32_to_cpup(p++);
343 if (bmval[0] & FATTR4_WORD0_SIZE) {
346 p = xdr_decode_hyper(p, &iattr->ia_size);
347 iattr->ia_valid |= ATTR_SIZE;
349 if (bmval[0] & FATTR4_WORD0_ACL) {
351 struct nfs4_ace *ace;
353 READ_BUF(4); len += 4;
354 nace = be32_to_cpup(p++);
356 if (nace > NFS4_ACL_MAX)
359 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
361 return nfserr_jukebox;
363 (*acl)->naces = nace;
364 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
365 READ_BUF(16); len += 16;
366 ace->type = be32_to_cpup(p++);
367 ace->flag = be32_to_cpup(p++);
368 ace->access_mask = be32_to_cpup(p++);
369 dummy32 = be32_to_cpup(p++);
371 len += XDR_QUADLEN(dummy32) << 2;
372 READMEM(buf, dummy32);
373 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
375 if (ace->whotype != NFS4_ACL_WHO_NAMED)
377 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
378 status = nfsd_map_name_to_gid(argp->rqstp,
379 buf, dummy32, &ace->who_gid);
381 status = nfsd_map_name_to_uid(argp->rqstp,
382 buf, dummy32, &ace->who_uid);
388 if (bmval[1] & FATTR4_WORD1_MODE) {
391 iattr->ia_mode = be32_to_cpup(p++);
392 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
393 iattr->ia_valid |= ATTR_MODE;
395 if (bmval[1] & FATTR4_WORD1_OWNER) {
398 dummy32 = be32_to_cpup(p++);
400 len += (XDR_QUADLEN(dummy32) << 2);
401 READMEM(buf, dummy32);
402 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
404 iattr->ia_valid |= ATTR_UID;
406 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
409 dummy32 = be32_to_cpup(p++);
411 len += (XDR_QUADLEN(dummy32) << 2);
412 READMEM(buf, dummy32);
413 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
415 iattr->ia_valid |= ATTR_GID;
417 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
420 dummy32 = be32_to_cpup(p++);
422 case NFS4_SET_TO_CLIENT_TIME:
424 status = nfsd4_decode_time(argp, &iattr->ia_atime);
427 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
429 case NFS4_SET_TO_SERVER_TIME:
430 iattr->ia_valid |= ATTR_ATIME;
436 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
439 dummy32 = be32_to_cpup(p++);
441 case NFS4_SET_TO_CLIENT_TIME:
443 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
446 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
448 case NFS4_SET_TO_SERVER_TIME:
449 iattr->ia_valid |= ATTR_MTIME;
457 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
458 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
461 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
464 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
467 dummy32 = be32_to_cpup(p++);
469 if (dummy32 > NFS4_MAXLABELLEN)
470 return nfserr_badlabel;
471 len += (XDR_QUADLEN(dummy32) << 2);
472 READMEM(buf, dummy32);
473 label->len = dummy32;
474 label->data = svcxdr_dupstr(argp, buf, dummy32);
476 return nfserr_jukebox;
479 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
484 dummy32 = be32_to_cpup(p++);
485 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
486 dummy32 = be32_to_cpup(p++);
487 *umask = dummy32 & S_IRWXUGO;
488 iattr->ia_valid |= ATTR_MODE;
490 if (len != expected_len)
497 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
501 READ_BUF(sizeof(stateid_t));
502 sid->si_generation = be32_to_cpup(p++);
503 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
509 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
514 access->ac_req_access = be32_to_cpup(p++);
519 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
527 /* callback_sec_params4 */
529 nr_secflavs = be32_to_cpup(p++);
531 cbs->flavor = (u32)(-1);
533 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
535 for (i = 0; i < nr_secflavs; ++i) {
537 dummy = be32_to_cpup(p++);
540 /* Nothing to read */
541 if (cbs->flavor == (u32)(-1))
542 cbs->flavor = RPC_AUTH_NULL;
547 dummy = be32_to_cpup(p++);
550 dummy = be32_to_cpup(p++);
552 SAVEMEM(machine_name, dummy);
556 uid = be32_to_cpup(p++);
557 gid = be32_to_cpup(p++);
561 dummy = be32_to_cpup(p++);
563 if (cbs->flavor == (u32)(-1)) {
564 kuid_t kuid = make_kuid(&init_user_ns, uid);
565 kgid_t kgid = make_kgid(&init_user_ns, gid);
566 if (uid_valid(kuid) && gid_valid(kgid)) {
569 cbs->flavor = RPC_AUTH_UNIX;
571 dprintk("RPC_AUTH_UNIX with invalid"
572 "uid or gid ignoring!\n");
577 dprintk("RPC_AUTH_GSS callback secflavor "
581 dummy = be32_to_cpup(p++);
582 /* gcbp_handle_from_server */
583 dummy = be32_to_cpup(p++);
585 p += XDR_QUADLEN(dummy);
586 /* gcbp_handle_from_client */
588 dummy = be32_to_cpup(p++);
592 dprintk("Illegal callback secflavor\n");
599 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
604 bc->bc_cb_program = be32_to_cpup(p++);
605 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
610 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
614 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
615 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
616 bcts->dir = be32_to_cpup(p++);
617 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
618 * could help us figure out we should be using it. */
623 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
628 close->cl_seqid = be32_to_cpup(p++);
629 return nfsd4_decode_stateid(argp, &close->cl_stateid);
636 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
641 p = xdr_decode_hyper(p, &commit->co_offset);
642 commit->co_count = be32_to_cpup(p++);
648 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
653 create->cr_type = be32_to_cpup(p++);
654 switch (create->cr_type) {
657 create->cr_datalen = be32_to_cpup(p++);
658 READ_BUF(create->cr_datalen);
659 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
660 if (!create->cr_data)
661 return nfserr_jukebox;
666 create->cr_specdata1 = be32_to_cpup(p++);
667 create->cr_specdata2 = be32_to_cpup(p++);
677 create->cr_namelen = be32_to_cpup(p++);
678 READ_BUF(create->cr_namelen);
679 SAVEMEM(create->cr_name, create->cr_namelen);
680 if ((status = check_filename(create->cr_name, create->cr_namelen)))
683 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
684 &create->cr_acl, &create->cr_label,
693 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
695 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
699 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
701 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
705 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
710 link->li_namelen = be32_to_cpup(p++);
711 READ_BUF(link->li_namelen);
712 SAVEMEM(link->li_name, link->li_namelen);
713 if ((status = check_filename(link->li_name, link->li_namelen)))
720 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
725 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
728 lock->lk_type = be32_to_cpup(p++);
729 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
731 lock->lk_reclaim = be32_to_cpup(p++);
732 p = xdr_decode_hyper(p, &lock->lk_offset);
733 p = xdr_decode_hyper(p, &lock->lk_length);
734 lock->lk_is_new = be32_to_cpup(p++);
736 if (lock->lk_is_new) {
738 lock->lk_new_open_seqid = be32_to_cpup(p++);
739 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
742 READ_BUF(8 + sizeof(clientid_t));
743 lock->lk_new_lock_seqid = be32_to_cpup(p++);
744 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
745 lock->lk_new_owner.len = be32_to_cpup(p++);
746 READ_BUF(lock->lk_new_owner.len);
747 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
749 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
753 lock->lk_old_lock_seqid = be32_to_cpup(p++);
760 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
765 lockt->lt_type = be32_to_cpup(p++);
766 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
768 p = xdr_decode_hyper(p, &lockt->lt_offset);
769 p = xdr_decode_hyper(p, &lockt->lt_length);
770 COPYMEM(&lockt->lt_clientid, 8);
771 lockt->lt_owner.len = be32_to_cpup(p++);
772 READ_BUF(lockt->lt_owner.len);
773 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
779 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
784 locku->lu_type = be32_to_cpup(p++);
785 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
787 locku->lu_seqid = be32_to_cpup(p++);
788 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
792 p = xdr_decode_hyper(p, &locku->lu_offset);
793 p = xdr_decode_hyper(p, &locku->lu_length);
799 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
804 lookup->lo_len = be32_to_cpup(p++);
805 READ_BUF(lookup->lo_len);
806 SAVEMEM(lookup->lo_name, lookup->lo_len);
807 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
813 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
819 w = be32_to_cpup(p++);
820 *share_access = w & NFS4_SHARE_ACCESS_MASK;
821 *deleg_want = w & NFS4_SHARE_WANT_MASK;
823 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
825 switch (w & NFS4_SHARE_ACCESS_MASK) {
826 case NFS4_SHARE_ACCESS_READ:
827 case NFS4_SHARE_ACCESS_WRITE:
828 case NFS4_SHARE_ACCESS_BOTH:
831 return nfserr_bad_xdr;
833 w &= ~NFS4_SHARE_ACCESS_MASK;
836 if (!argp->minorversion)
837 return nfserr_bad_xdr;
838 switch (w & NFS4_SHARE_WANT_MASK) {
839 case NFS4_SHARE_WANT_NO_PREFERENCE:
840 case NFS4_SHARE_WANT_READ_DELEG:
841 case NFS4_SHARE_WANT_WRITE_DELEG:
842 case NFS4_SHARE_WANT_ANY_DELEG:
843 case NFS4_SHARE_WANT_NO_DELEG:
844 case NFS4_SHARE_WANT_CANCEL:
847 return nfserr_bad_xdr;
849 w &= ~NFS4_SHARE_WANT_MASK;
853 if (!deleg_when) /* open_downgrade */
856 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
857 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
858 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
859 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
863 return nfserr_bad_xdr;
866 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
871 *x = be32_to_cpup(p++);
872 /* Note: unlinke access bits, deny bits may be zero. */
873 if (*x & ~NFS4_SHARE_DENY_BOTH)
874 return nfserr_bad_xdr;
877 return nfserr_bad_xdr;
880 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
885 o->len = be32_to_cpup(p++);
887 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
888 return nfserr_bad_xdr;
891 SAVEMEM(o->data, o->len);
894 return nfserr_bad_xdr;
898 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
903 memset(open->op_bmval, 0, sizeof(open->op_bmval));
904 open->op_iattr.ia_valid = 0;
905 open->op_openowner = NULL;
907 open->op_xdr_error = 0;
908 /* seqid, share_access, share_deny, clientid, ownerlen */
910 open->op_seqid = be32_to_cpup(p++);
911 /* decode, yet ignore deleg_when until supported */
912 status = nfsd4_decode_share_access(argp, &open->op_share_access,
913 &open->op_deleg_want, &dummy);
916 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
919 READ_BUF(sizeof(clientid_t));
920 COPYMEM(&open->op_clientid, sizeof(clientid_t));
921 status = nfsd4_decode_opaque(argp, &open->op_owner);
925 open->op_create = be32_to_cpup(p++);
926 switch (open->op_create) {
927 case NFS4_OPEN_NOCREATE:
929 case NFS4_OPEN_CREATE:
931 open->op_createmode = be32_to_cpup(p++);
932 switch (open->op_createmode) {
933 case NFS4_CREATE_UNCHECKED:
934 case NFS4_CREATE_GUARDED:
935 status = nfsd4_decode_fattr(argp, open->op_bmval,
936 &open->op_iattr, &open->op_acl, &open->op_label,
941 case NFS4_CREATE_EXCLUSIVE:
942 READ_BUF(NFS4_VERIFIER_SIZE);
943 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
945 case NFS4_CREATE_EXCLUSIVE4_1:
946 if (argp->minorversion < 1)
948 READ_BUF(NFS4_VERIFIER_SIZE);
949 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
950 status = nfsd4_decode_fattr(argp, open->op_bmval,
951 &open->op_iattr, &open->op_acl, &open->op_label,
966 open->op_claim_type = be32_to_cpup(p++);
967 switch (open->op_claim_type) {
968 case NFS4_OPEN_CLAIM_NULL:
969 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
971 open->op_fname.len = be32_to_cpup(p++);
972 READ_BUF(open->op_fname.len);
973 SAVEMEM(open->op_fname.data, open->op_fname.len);
974 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
977 case NFS4_OPEN_CLAIM_PREVIOUS:
979 open->op_delegate_type = be32_to_cpup(p++);
981 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
982 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
986 open->op_fname.len = be32_to_cpup(p++);
987 READ_BUF(open->op_fname.len);
988 SAVEMEM(open->op_fname.data, open->op_fname.len);
989 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
992 case NFS4_OPEN_CLAIM_FH:
993 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
994 if (argp->minorversion < 1)
998 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
999 if (argp->minorversion < 1)
1001 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1013 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1017 if (argp->minorversion >= 1)
1018 return nfserr_notsupp;
1020 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1024 open_conf->oc_seqid = be32_to_cpup(p++);
1030 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1034 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1038 open_down->od_seqid = be32_to_cpup(p++);
1039 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1040 &open_down->od_deleg_want, NULL);
1043 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1050 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1055 putfh->pf_fhlen = be32_to_cpup(p++);
1056 if (putfh->pf_fhlen > NFS4_FHSIZE)
1058 READ_BUF(putfh->pf_fhlen);
1059 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1065 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1067 if (argp->minorversion == 0)
1069 return nfserr_notsupp;
1073 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1077 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1081 p = xdr_decode_hyper(p, &read->rd_offset);
1082 read->rd_length = be32_to_cpup(p++);
1088 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1093 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1094 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1095 readdir->rd_dircount = be32_to_cpup(p++);
1096 readdir->rd_maxcount = be32_to_cpup(p++);
1097 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1104 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1109 remove->rm_namelen = be32_to_cpup(p++);
1110 READ_BUF(remove->rm_namelen);
1111 SAVEMEM(remove->rm_name, remove->rm_namelen);
1112 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1119 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1124 rename->rn_snamelen = be32_to_cpup(p++);
1125 READ_BUF(rename->rn_snamelen);
1126 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1128 rename->rn_tnamelen = be32_to_cpup(p++);
1129 READ_BUF(rename->rn_tnamelen);
1130 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1131 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1133 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1140 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1144 if (argp->minorversion >= 1)
1145 return nfserr_notsupp;
1147 READ_BUF(sizeof(clientid_t));
1148 COPYMEM(clientid, sizeof(clientid_t));
1154 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1155 struct nfsd4_secinfo *secinfo)
1160 secinfo->si_namelen = be32_to_cpup(p++);
1161 READ_BUF(secinfo->si_namelen);
1162 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1163 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1170 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1171 struct nfsd4_secinfo_no_name *sin)
1176 sin->sin_style = be32_to_cpup(p++);
1181 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1185 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1188 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1189 &setattr->sa_acl, &setattr->sa_label, NULL);
1193 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1197 if (argp->minorversion >= 1)
1198 return nfserr_notsupp;
1200 READ_BUF(NFS4_VERIFIER_SIZE);
1201 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1203 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1205 return nfserr_bad_xdr;
1207 setclientid->se_callback_prog = be32_to_cpup(p++);
1208 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1209 READ_BUF(setclientid->se_callback_netid_len);
1210 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1212 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1214 READ_BUF(setclientid->se_callback_addr_len);
1215 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1217 setclientid->se_callback_ident = be32_to_cpup(p++);
1223 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1227 if (argp->minorversion >= 1)
1228 return nfserr_notsupp;
1230 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1231 COPYMEM(&scd_c->sc_clientid, 8);
1232 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1237 /* Also used for NVERIFY */
1239 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1243 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1246 /* For convenience's sake, we compare raw xdr'd attributes in
1247 * nfsd4_proc_verify */
1250 verify->ve_attrlen = be32_to_cpup(p++);
1251 READ_BUF(verify->ve_attrlen);
1252 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1258 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1264 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1268 p = xdr_decode_hyper(p, &write->wr_offset);
1269 write->wr_stable_how = be32_to_cpup(p++);
1270 if (write->wr_stable_how > NFS_FILE_SYNC)
1272 write->wr_buflen = be32_to_cpup(p++);
1274 /* Sorry .. no magic macros for this.. *
1275 * READ_BUF(write->wr_buflen);
1276 * SAVEMEM(write->wr_buf, write->wr_buflen);
1278 avail = (char*)argp->end - (char*)argp->p;
1279 if (avail + argp->pagelen < write->wr_buflen) {
1280 dprintk("NFSD: xdr error (%s:%d)\n",
1281 __FILE__, __LINE__);
1284 write->wr_head.iov_base = p;
1285 write->wr_head.iov_len = avail;
1286 write->wr_pagelist = argp->pagelist;
1288 len = XDR_QUADLEN(write->wr_buflen) << 2;
1294 pages = len >> PAGE_SHIFT;
1295 argp->pagelist += pages;
1296 argp->pagelen -= pages * PAGE_SIZE;
1297 len -= pages * PAGE_SIZE;
1299 next_decode_page(argp);
1301 argp->p += XDR_QUADLEN(len);
1307 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1311 if (argp->minorversion >= 1)
1312 return nfserr_notsupp;
1315 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1316 rlockowner->rl_owner.len = be32_to_cpup(p++);
1317 READ_BUF(rlockowner->rl_owner.len);
1318 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1320 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1321 return nfserr_inval;
1326 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1327 struct nfsd4_exchange_id *exid)
1332 READ_BUF(NFS4_VERIFIER_SIZE);
1333 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1335 status = nfsd4_decode_opaque(argp, &exid->clname);
1337 return nfserr_bad_xdr;
1340 exid->flags = be32_to_cpup(p++);
1342 /* Ignore state_protect4_a */
1344 exid->spa_how = be32_to_cpup(p++);
1345 switch (exid->spa_how) {
1349 /* spo_must_enforce */
1350 status = nfsd4_decode_bitmap(argp,
1351 exid->spo_must_enforce);
1354 /* spo_must_allow */
1355 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1362 dummy = be32_to_cpup(p++);
1363 READ_BUF(dummy * 4);
1367 dummy = be32_to_cpup(p++);
1368 READ_BUF(dummy * 4);
1371 /* ssp_hash_algs<> */
1373 tmp = be32_to_cpup(p++);
1376 dummy = be32_to_cpup(p++);
1378 p += XDR_QUADLEN(dummy);
1381 /* ssp_encr_algs<> */
1383 tmp = be32_to_cpup(p++);
1386 dummy = be32_to_cpup(p++);
1388 p += XDR_QUADLEN(dummy);
1391 /* ssp_window and ssp_num_gss_handles */
1393 dummy = be32_to_cpup(p++);
1394 dummy = be32_to_cpup(p++);
1400 /* Ignore Implementation ID */
1401 READ_BUF(4); /* nfs_impl_id4 array length */
1402 dummy = be32_to_cpup(p++);
1410 dummy = be32_to_cpup(p++);
1412 p += XDR_QUADLEN(dummy);
1416 dummy = be32_to_cpup(p++);
1418 p += XDR_QUADLEN(dummy);
1428 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1429 struct nfsd4_create_session *sess)
1435 COPYMEM(&sess->clientid, 8);
1436 sess->seqid = be32_to_cpup(p++);
1437 sess->flags = be32_to_cpup(p++);
1439 /* Fore channel attrs */
1441 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1442 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1443 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1444 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1445 sess->fore_channel.maxops = be32_to_cpup(p++);
1446 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1447 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1448 if (sess->fore_channel.nr_rdma_attrs == 1) {
1450 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1451 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1452 dprintk("Too many fore channel attr bitmaps!\n");
1456 /* Back channel attrs */
1458 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1459 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1460 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1461 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1462 sess->back_channel.maxops = be32_to_cpup(p++);
1463 sess->back_channel.maxreqs = be32_to_cpup(p++);
1464 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1465 if (sess->back_channel.nr_rdma_attrs == 1) {
1467 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1468 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1469 dprintk("Too many back channel attr bitmaps!\n");
1474 sess->callback_prog = be32_to_cpup(p++);
1475 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1480 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1481 struct nfsd4_destroy_session *destroy_session)
1484 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1485 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1491 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1492 struct nfsd4_free_stateid *free_stateid)
1496 READ_BUF(sizeof(stateid_t));
1497 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1498 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1504 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1505 struct nfsd4_sequence *seq)
1509 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1510 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1511 seq->seqid = be32_to_cpup(p++);
1512 seq->slotid = be32_to_cpup(p++);
1513 seq->maxslots = be32_to_cpup(p++);
1514 seq->cachethis = be32_to_cpup(p++);
1520 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1524 struct nfsd4_test_stateid_id *stateid;
1527 test_stateid->ts_num_ids = ntohl(*p++);
1529 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1531 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1532 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1534 status = nfserrno(-ENOMEM);
1538 INIT_LIST_HEAD(&stateid->ts_id_list);
1539 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1541 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1550 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1551 status = nfserr_bad_xdr;
1555 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1560 COPYMEM(&dc->clientid, 8);
1565 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1570 rc->rca_one_fs = be32_to_cpup(p++);
1575 #ifdef CONFIG_NFSD_PNFS
1577 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1578 struct nfsd4_getdeviceinfo *gdev)
1583 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1584 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1585 gdev->gd_layout_type = be32_to_cpup(p++);
1586 gdev->gd_maxcount = be32_to_cpup(p++);
1587 num = be32_to_cpup(p++);
1592 gdev->gd_notify_types = be32_to_cpup(p++);
1593 for (i = 1; i < num; i++) {
1594 if (be32_to_cpup(p++)) {
1595 status = nfserr_inval;
1604 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1605 struct nfsd4_layoutget *lgp)
1610 lgp->lg_signal = be32_to_cpup(p++);
1611 lgp->lg_layout_type = be32_to_cpup(p++);
1612 lgp->lg_seg.iomode = be32_to_cpup(p++);
1613 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1614 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1615 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1617 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1622 lgp->lg_maxcount = be32_to_cpup(p++);
1628 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1629 struct nfsd4_layoutcommit *lcp)
1635 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1636 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1637 lcp->lc_reclaim = be32_to_cpup(p++);
1639 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1644 lcp->lc_newoffset = be32_to_cpup(p++);
1645 if (lcp->lc_newoffset) {
1647 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1649 lcp->lc_last_wr = 0;
1651 timechange = be32_to_cpup(p++);
1653 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1657 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1660 lcp->lc_layout_type = be32_to_cpup(p++);
1663 * Save the layout update in XDR format and let the layout driver deal
1666 lcp->lc_up_len = be32_to_cpup(p++);
1667 if (lcp->lc_up_len > 0) {
1668 READ_BUF(lcp->lc_up_len);
1669 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1676 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1677 struct nfsd4_layoutreturn *lrp)
1682 lrp->lr_reclaim = be32_to_cpup(p++);
1683 lrp->lr_layout_type = be32_to_cpup(p++);
1684 lrp->lr_seg.iomode = be32_to_cpup(p++);
1685 lrp->lr_return_type = be32_to_cpup(p++);
1686 if (lrp->lr_return_type == RETURN_FILE) {
1688 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1689 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1691 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1696 lrp->lrf_body_len = be32_to_cpup(p++);
1697 if (lrp->lrf_body_len > 0) {
1698 READ_BUF(lrp->lrf_body_len);
1699 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1702 lrp->lr_seg.offset = 0;
1703 lrp->lr_seg.length = NFS4_MAX_UINT64;
1708 #endif /* CONFIG_NFSD_PNFS */
1711 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1712 struct nfsd4_fallocate *fallocate)
1716 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1721 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1722 xdr_decode_hyper(p, &fallocate->falloc_length);
1728 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1732 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1735 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1739 READ_BUF(8 + 8 + 8);
1740 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1741 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1742 p = xdr_decode_hyper(p, &clone->cl_count);
1747 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1752 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
1755 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
1759 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1760 p = xdr_decode_hyper(p, ©->cp_src_pos);
1761 p = xdr_decode_hyper(p, ©->cp_dst_pos);
1762 p = xdr_decode_hyper(p, ©->cp_count);
1763 copy->cp_consecutive = be32_to_cpup(p++);
1764 copy->cp_synchronous = be32_to_cpup(p++);
1765 tmp = be32_to_cpup(p); /* Source server list not supported */
1771 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1775 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1780 p = xdr_decode_hyper(p, &seek->seek_offset);
1781 seek->seek_whence = be32_to_cpup(p);
1787 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1793 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1795 return nfserr_notsupp;
1798 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1800 static const nfsd4_dec nfsd4_dec_ops[] = {
1801 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1802 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1803 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1804 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1805 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1806 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1807 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1808 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1809 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1810 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1811 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1812 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1813 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1814 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1815 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1816 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1817 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1818 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1819 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1820 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1821 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1822 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1823 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1824 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1825 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1826 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1827 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1828 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1829 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1830 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1831 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1832 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1833 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1834 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1835 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1836 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1837 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1839 /* new operations for NFSv4.1 */
1840 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1841 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1842 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1843 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1844 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1845 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1846 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1847 #ifdef CONFIG_NFSD_PNFS
1848 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1849 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1850 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1851 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1852 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1854 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1855 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1856 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1857 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1858 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1860 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1861 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1862 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1863 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1864 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1865 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1866 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1868 /* new operations for NFSv4.2 */
1869 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1870 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
1871 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1872 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1873 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1874 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1875 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1876 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1877 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1878 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1879 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1880 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1881 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1885 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1887 if (op->opnum < FIRST_NFS4_OP)
1889 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1891 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1893 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1899 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1902 struct nfsd4_op *op;
1903 bool cachethis = false;
1904 int auth_slack= argp->rqstp->rq_auth_slack;
1905 int max_reply = auth_slack + 8; /* opcnt, status */
1911 argp->taglen = be32_to_cpup(p++);
1912 READ_BUF(argp->taglen);
1913 SAVEMEM(argp->tag, argp->taglen);
1915 argp->minorversion = be32_to_cpup(p++);
1916 argp->opcnt = be32_to_cpup(p++);
1917 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1919 if (argp->taglen > NFSD4_MAX_TAGLEN)
1921 if (argp->opcnt > 100)
1924 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1925 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1927 argp->ops = argp->iops;
1928 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1933 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1936 for (i = 0; i < argp->opcnt; i++) {
1941 op->opnum = be32_to_cpup(p++);
1943 if (nfsd4_opnum_in_range(argp, op))
1944 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1946 op->opnum = OP_ILLEGAL;
1947 op->status = nfserr_op_illegal;
1949 op->opdesc = OPDESC(op);
1951 * We'll try to cache the result in the DRC if any one
1952 * op in the compound wants to be cached:
1954 cachethis |= nfsd4_cache_this_op(op);
1956 if (op->opnum == OP_READ) {
1958 readbytes += nfsd4_max_reply(argp->rqstp, op);
1960 max_reply += nfsd4_max_reply(argp->rqstp, op);
1962 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1963 * (Special case because it will just skip encoding this
1964 * if it runs out of xdr buffer space, and it is the only
1965 * operation that behaves this way.)
1967 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
1968 max_reply += NFS4_OPAQUE_LIMIT;
1975 /* Sessions make the DRC unnecessary: */
1976 if (argp->minorversion)
1978 svc_reserve(argp->rqstp, max_reply + readbytes);
1979 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1981 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1982 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1987 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1988 struct svc_export *exp)
1990 if (exp->ex_flags & NFSEXP_V4ROOT) {
1991 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1993 } else if (IS_I_VERSION(inode)) {
1994 p = xdr_encode_hyper(p, nfsd4_change_attribute(inode));
1996 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1997 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
2002 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
2004 *p++ = cpu_to_be32(c->atomic);
2005 if (c->change_supported) {
2006 p = xdr_encode_hyper(p, c->before_change);
2007 p = xdr_encode_hyper(p, c->after_change);
2009 *p++ = cpu_to_be32(c->before_ctime_sec);
2010 *p++ = cpu_to_be32(c->before_ctime_nsec);
2011 *p++ = cpu_to_be32(c->after_ctime_sec);
2012 *p++ = cpu_to_be32(c->after_ctime_nsec);
2017 /* Encode as an array of strings the string given with components
2018 * separated @sep, escaped with esc_enter and esc_exit.
2020 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2021 char *components, char esc_enter,
2027 int strlen, count=0;
2028 char *str, *end, *next;
2030 dprintk("nfsd4_encode_components(%s)\n", components);
2032 pathlen_offset = xdr->buf->len;
2033 p = xdr_reserve_space(xdr, 4);
2035 return nfserr_resource;
2036 p++; /* We will fill this in with @count later */
2038 end = str = components;
2040 bool found_esc = false;
2042 /* try to parse as esc_start, ..., esc_end, sep */
2043 if (*str == esc_enter) {
2044 for (; *end && (*end != esc_exit); end++)
2045 /* find esc_exit or end of string */;
2047 if (*end && (!*next || *next == sep)) {
2054 for (; *end && (*end != sep); end++)
2055 /* find sep or end of string */;
2059 p = xdr_reserve_space(xdr, strlen + 4);
2061 return nfserr_resource;
2062 p = xdr_encode_opaque(p, str, strlen);
2072 pathlen = htonl(count);
2073 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2077 /* Encode as an array of strings the string given with components
2080 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2083 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2087 * encode a location element of a fs_locations structure
2089 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2090 struct nfsd4_fs_location *location)
2094 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2098 status = nfsd4_encode_components(xdr, '/', location->path);
2105 * Encode a path in RFC3530 'pathname4' format
2107 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2108 const struct path *root,
2109 const struct path *path)
2111 struct path cur = *path;
2113 struct dentry **components = NULL;
2114 unsigned int ncomponents = 0;
2115 __be32 err = nfserr_jukebox;
2117 dprintk("nfsd4_encode_components(");
2120 /* First walk the path up to the nfsd root, and store the
2121 * dentries/path components in an array.
2124 if (path_equal(&cur, root))
2126 if (cur.dentry == cur.mnt->mnt_root) {
2127 if (follow_up(&cur))
2131 if ((ncomponents & 15) == 0) {
2132 struct dentry **new;
2133 new = krealloc(components,
2134 sizeof(*new) * (ncomponents + 16),
2140 components[ncomponents++] = cur.dentry;
2141 cur.dentry = dget_parent(cur.dentry);
2143 err = nfserr_resource;
2144 p = xdr_reserve_space(xdr, 4);
2147 *p++ = cpu_to_be32(ncomponents);
2149 while (ncomponents) {
2150 struct dentry *dentry = components[ncomponents - 1];
2153 spin_lock(&dentry->d_lock);
2154 len = dentry->d_name.len;
2155 p = xdr_reserve_space(xdr, len + 4);
2157 spin_unlock(&dentry->d_lock);
2160 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2161 dprintk("/%pd", dentry);
2162 spin_unlock(&dentry->d_lock);
2171 dput(components[--ncomponents]);
2177 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2178 struct svc_rqst *rqstp, const struct path *path)
2180 struct svc_export *exp_ps;
2183 exp_ps = rqst_find_fsidzero_export(rqstp);
2185 return nfserrno(PTR_ERR(exp_ps));
2186 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2192 * encode a fs_locations structure
2194 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2195 struct svc_rqst *rqstp, struct svc_export *exp)
2200 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2202 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2205 p = xdr_reserve_space(xdr, 4);
2207 return nfserr_resource;
2208 *p++ = cpu_to_be32(fslocs->locations_count);
2209 for (i=0; i<fslocs->locations_count; i++) {
2210 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2217 static u32 nfs4_file_type(umode_t mode)
2219 switch (mode & S_IFMT) {
2220 case S_IFIFO: return NF4FIFO;
2221 case S_IFCHR: return NF4CHR;
2222 case S_IFDIR: return NF4DIR;
2223 case S_IFBLK: return NF4BLK;
2224 case S_IFLNK: return NF4LNK;
2225 case S_IFREG: return NF4REG;
2226 case S_IFSOCK: return NF4SOCK;
2227 default: return NF4BAD;
2231 static inline __be32
2232 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2233 struct nfs4_ace *ace)
2235 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2236 return nfs4_acl_write_who(xdr, ace->whotype);
2237 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2238 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2240 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2243 static inline __be32
2244 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2247 unsigned long i = hweight_long(layout_types);
2249 p = xdr_reserve_space(xdr, 4 + 4 * i);
2251 return nfserr_resource;
2253 *p++ = cpu_to_be32(i);
2255 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2256 if (layout_types & (1 << i))
2257 *p++ = cpu_to_be32(i);
2262 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2263 FATTR4_WORD0_RDATTR_ERROR)
2264 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2265 #define WORD2_ABSENT_FS_ATTRS 0
2267 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2268 static inline __be32
2269 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2270 void *context, int len)
2274 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2276 return nfserr_resource;
2279 * For now we use a 0 here to indicate the null translation; in
2280 * the future we may place a call to translation code here.
2282 *p++ = cpu_to_be32(0); /* lfs */
2283 *p++ = cpu_to_be32(0); /* pi */
2284 p = xdr_encode_opaque(p, context, len);
2288 static inline __be32
2289 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2290 void *context, int len)
2294 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2296 /* As per referral draft: */
2297 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2298 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2299 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2300 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2301 *rdattr_err = NFSERR_MOVED;
2303 return nfserr_moved;
2305 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2306 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2307 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2312 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2314 struct path path = exp->ex_path;
2318 while (follow_up(&path)) {
2319 if (path.dentry != path.mnt->mnt_root)
2322 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2328 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2333 p = xdr_reserve_space(xdr, 16);
2336 *p++ = cpu_to_be32(3);
2337 *p++ = cpu_to_be32(bmval0);
2338 *p++ = cpu_to_be32(bmval1);
2339 *p++ = cpu_to_be32(bmval2);
2340 } else if (bmval1) {
2341 p = xdr_reserve_space(xdr, 12);
2344 *p++ = cpu_to_be32(2);
2345 *p++ = cpu_to_be32(bmval0);
2346 *p++ = cpu_to_be32(bmval1);
2348 p = xdr_reserve_space(xdr, 8);
2351 *p++ = cpu_to_be32(1);
2352 *p++ = cpu_to_be32(bmval0);
2357 return nfserr_resource;
2361 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2365 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2366 struct svc_export *exp,
2367 struct dentry *dentry, u32 *bmval,
2368 struct svc_rqst *rqstp, int ignore_crossmnt)
2370 u32 bmval0 = bmval[0];
2371 u32 bmval1 = bmval[1];
2372 u32 bmval2 = bmval[2];
2374 struct svc_fh *tempfh = NULL;
2375 struct kstatfs statfs;
2377 int starting_len = xdr->buf->len;
2385 struct nfs4_acl *acl = NULL;
2386 void *context = NULL;
2388 bool contextsupport = false;
2389 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2390 u32 minorversion = resp->cstate.minorversion;
2391 struct path path = {
2392 .mnt = exp->ex_path.mnt,
2395 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2397 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2398 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2400 if (exp->ex_fslocs.migrated) {
2401 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2406 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2409 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2410 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2411 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2412 FATTR4_WORD1_SPACE_TOTAL))) {
2413 err = vfs_statfs(&path, &statfs);
2417 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2418 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2419 status = nfserr_jukebox;
2422 fh_init(tempfh, NFS4_FHSIZE);
2423 status = fh_compose(tempfh, exp, dentry, NULL);
2428 if (bmval0 & FATTR4_WORD0_ACL) {
2429 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2430 if (err == -EOPNOTSUPP)
2431 bmval0 &= ~FATTR4_WORD0_ACL;
2432 else if (err == -EINVAL) {
2433 status = nfserr_attrnotsupp;
2435 } else if (err != 0)
2439 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2440 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2441 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2442 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2443 err = security_inode_getsecctx(d_inode(dentry),
2444 &context, &contextlen);
2447 contextsupport = (err == 0);
2448 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2449 if (err == -EOPNOTSUPP)
2450 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2455 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2457 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2461 attrlen_offset = xdr->buf->len;
2462 p = xdr_reserve_space(xdr, 4);
2465 p++; /* to be backfilled later */
2467 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2470 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2472 if (!IS_POSIXACL(dentry->d_inode))
2473 supp[0] &= ~FATTR4_WORD0_ACL;
2474 if (!contextsupport)
2475 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2477 p = xdr_reserve_space(xdr, 12);
2480 *p++ = cpu_to_be32(2);
2481 *p++ = cpu_to_be32(supp[0]);
2482 *p++ = cpu_to_be32(supp[1]);
2484 p = xdr_reserve_space(xdr, 16);
2487 *p++ = cpu_to_be32(3);
2488 *p++ = cpu_to_be32(supp[0]);
2489 *p++ = cpu_to_be32(supp[1]);
2490 *p++ = cpu_to_be32(supp[2]);
2493 if (bmval0 & FATTR4_WORD0_TYPE) {
2494 p = xdr_reserve_space(xdr, 4);
2497 dummy = nfs4_file_type(stat.mode);
2498 if (dummy == NF4BAD) {
2499 status = nfserr_serverfault;
2502 *p++ = cpu_to_be32(dummy);
2504 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2505 p = xdr_reserve_space(xdr, 4);
2508 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2509 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2511 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2512 NFS4_FH_VOL_RENAME);
2514 if (bmval0 & FATTR4_WORD0_CHANGE) {
2515 p = xdr_reserve_space(xdr, 8);
2518 p = encode_change(p, &stat, d_inode(dentry), exp);
2520 if (bmval0 & FATTR4_WORD0_SIZE) {
2521 p = xdr_reserve_space(xdr, 8);
2524 p = xdr_encode_hyper(p, stat.size);
2526 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2527 p = xdr_reserve_space(xdr, 4);
2530 *p++ = cpu_to_be32(1);
2532 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2533 p = xdr_reserve_space(xdr, 4);
2536 *p++ = cpu_to_be32(1);
2538 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2539 p = xdr_reserve_space(xdr, 4);
2542 *p++ = cpu_to_be32(0);
2544 if (bmval0 & FATTR4_WORD0_FSID) {
2545 p = xdr_reserve_space(xdr, 16);
2548 if (exp->ex_fslocs.migrated) {
2549 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2550 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2551 } else switch(fsid_source(fhp)) {
2552 case FSIDSOURCE_FSID:
2553 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2554 p = xdr_encode_hyper(p, (u64)0);
2556 case FSIDSOURCE_DEV:
2557 *p++ = cpu_to_be32(0);
2558 *p++ = cpu_to_be32(MAJOR(stat.dev));
2559 *p++ = cpu_to_be32(0);
2560 *p++ = cpu_to_be32(MINOR(stat.dev));
2562 case FSIDSOURCE_UUID:
2563 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2568 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2569 p = xdr_reserve_space(xdr, 4);
2572 *p++ = cpu_to_be32(0);
2574 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2575 p = xdr_reserve_space(xdr, 4);
2578 *p++ = cpu_to_be32(nn->nfsd4_lease);
2580 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2581 p = xdr_reserve_space(xdr, 4);
2584 *p++ = cpu_to_be32(rdattr_err);
2586 if (bmval0 & FATTR4_WORD0_ACL) {
2587 struct nfs4_ace *ace;
2590 p = xdr_reserve_space(xdr, 4);
2594 *p++ = cpu_to_be32(0);
2597 p = xdr_reserve_space(xdr, 4);
2600 *p++ = cpu_to_be32(acl->naces);
2602 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2603 p = xdr_reserve_space(xdr, 4*3);
2606 *p++ = cpu_to_be32(ace->type);
2607 *p++ = cpu_to_be32(ace->flag);
2608 *p++ = cpu_to_be32(ace->access_mask &
2610 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2616 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2617 p = xdr_reserve_space(xdr, 4);
2620 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2621 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2623 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2624 p = xdr_reserve_space(xdr, 4);
2627 *p++ = cpu_to_be32(1);
2629 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2630 p = xdr_reserve_space(xdr, 4);
2633 *p++ = cpu_to_be32(0);
2635 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2636 p = xdr_reserve_space(xdr, 4);
2639 *p++ = cpu_to_be32(1);
2641 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2642 p = xdr_reserve_space(xdr, 4);
2645 *p++ = cpu_to_be32(1);
2647 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2648 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2651 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2652 fhp->fh_handle.fh_size);
2654 if (bmval0 & FATTR4_WORD0_FILEID) {
2655 p = xdr_reserve_space(xdr, 8);
2658 p = xdr_encode_hyper(p, stat.ino);
2660 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2661 p = xdr_reserve_space(xdr, 8);
2664 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2666 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2667 p = xdr_reserve_space(xdr, 8);
2670 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2672 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2673 p = xdr_reserve_space(xdr, 8);
2676 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2678 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2679 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2683 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2684 p = xdr_reserve_space(xdr, 4);
2687 *p++ = cpu_to_be32(1);
2689 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2690 p = xdr_reserve_space(xdr, 8);
2693 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2695 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2696 p = xdr_reserve_space(xdr, 4);
2699 *p++ = cpu_to_be32(255);
2701 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2702 p = xdr_reserve_space(xdr, 4);
2705 *p++ = cpu_to_be32(statfs.f_namelen);
2707 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2708 p = xdr_reserve_space(xdr, 8);
2711 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2713 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2714 p = xdr_reserve_space(xdr, 8);
2717 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2719 if (bmval1 & FATTR4_WORD1_MODE) {
2720 p = xdr_reserve_space(xdr, 4);
2723 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2725 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2726 p = xdr_reserve_space(xdr, 4);
2729 *p++ = cpu_to_be32(1);
2731 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2732 p = xdr_reserve_space(xdr, 4);
2735 *p++ = cpu_to_be32(stat.nlink);
2737 if (bmval1 & FATTR4_WORD1_OWNER) {
2738 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2742 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2743 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2747 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2748 p = xdr_reserve_space(xdr, 8);
2751 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2752 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2754 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2755 p = xdr_reserve_space(xdr, 8);
2758 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2759 p = xdr_encode_hyper(p, dummy64);
2761 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2762 p = xdr_reserve_space(xdr, 8);
2765 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2766 p = xdr_encode_hyper(p, dummy64);
2768 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2769 p = xdr_reserve_space(xdr, 8);
2772 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2773 p = xdr_encode_hyper(p, dummy64);
2775 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2776 p = xdr_reserve_space(xdr, 8);
2779 dummy64 = (u64)stat.blocks << 9;
2780 p = xdr_encode_hyper(p, dummy64);
2782 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2783 p = xdr_reserve_space(xdr, 12);
2786 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2787 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2789 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2790 p = xdr_reserve_space(xdr, 12);
2793 *p++ = cpu_to_be32(0);
2794 *p++ = cpu_to_be32(1);
2795 *p++ = cpu_to_be32(0);
2797 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2798 p = xdr_reserve_space(xdr, 12);
2801 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2802 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2804 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2805 p = xdr_reserve_space(xdr, 12);
2808 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2809 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2811 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2812 struct kstat parent_stat;
2815 p = xdr_reserve_space(xdr, 8);
2819 * Get parent's attributes if not ignoring crossmount
2820 * and this is the root of a cross-mounted filesystem.
2822 if (ignore_crossmnt == 0 &&
2823 dentry == exp->ex_path.mnt->mnt_root) {
2824 err = get_parent_attributes(exp, &parent_stat);
2827 ino = parent_stat.ino;
2829 p = xdr_encode_hyper(p, ino);
2831 #ifdef CONFIG_NFSD_PNFS
2832 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2833 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2838 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2839 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2844 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2845 p = xdr_reserve_space(xdr, 4);
2848 *p++ = cpu_to_be32(stat.blksize);
2850 #endif /* CONFIG_NFSD_PNFS */
2851 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2854 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2855 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2856 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2857 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2859 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
2864 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2865 status = nfsd4_encode_security_label(xdr, rqstp, context,
2871 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2872 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2876 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2878 security_release_secctx(context, contextlen);
2879 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2886 xdr_truncate_encode(xdr, starting_len);
2889 status = nfserrno(err);
2892 status = nfserr_resource;
2896 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2897 struct xdr_buf *buf, __be32 *p, int bytes)
2899 xdr->scratch.iov_len = 0;
2900 memset(buf, 0, sizeof(struct xdr_buf));
2901 buf->head[0].iov_base = p;
2902 buf->head[0].iov_len = 0;
2905 xdr->iov = buf->head;
2907 xdr->end = (void *)p + bytes;
2908 buf->buflen = bytes;
2911 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2912 struct svc_fh *fhp, struct svc_export *exp,
2913 struct dentry *dentry, u32 *bmval,
2914 struct svc_rqst *rqstp, int ignore_crossmnt)
2916 struct xdr_buf dummy;
2917 struct xdr_stream xdr;
2920 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2921 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2927 static inline int attributes_need_mount(u32 *bmval)
2929 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2931 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2937 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2938 const char *name, int namlen)
2940 struct svc_export *exp = cd->rd_fhp->fh_export;
2941 struct dentry *dentry;
2943 int ignore_crossmnt = 0;
2945 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2947 return nfserrno(PTR_ERR(dentry));
2948 if (d_really_is_negative(dentry)) {
2950 * we're not holding the i_mutex here, so there's
2951 * a window where this directory entry could have gone
2955 return nfserr_noent;
2960 * In the case of a mountpoint, the client may be asking for
2961 * attributes that are only properties of the underlying filesystem
2962 * as opposed to the cross-mounted file system. In such a case,
2963 * we will not follow the cross mount and will fill the attribtutes
2964 * directly from the mountpoint dentry.
2966 if (nfsd_mountpoint(dentry, exp)) {
2969 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2970 && !attributes_need_mount(cd->rd_bmval)) {
2971 ignore_crossmnt = 1;
2975 * Why the heck aren't we just using nfsd_lookup??
2976 * Different "."/".." handling? Something else?
2977 * At least, add a comment here to explain....
2979 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2981 nfserr = nfserrno(err);
2984 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2990 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2991 cd->rd_rqstp, ignore_crossmnt);
2999 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3003 p = xdr_reserve_space(xdr, 20);
3007 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3008 *p++ = htonl(0); /* bmval1 */
3010 *p++ = htonl(4); /* attribute length */
3011 *p++ = nfserr; /* no htonl */
3016 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3017 loff_t offset, u64 ino, unsigned int d_type)
3019 struct readdir_cd *ccd = ccdv;
3020 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3021 struct xdr_stream *xdr = cd->xdr;
3022 int start_offset = xdr->buf->len;
3024 u32 name_and_cookie;
3026 __be32 nfserr = nfserr_toosmall;
3030 /* In nfsv4, "." and ".." never make it onto the wire.. */
3031 if (name && isdotent(name, namlen)) {
3032 cd->common.err = nfs_ok;
3036 if (cd->cookie_offset) {
3037 wire_offset = cpu_to_be64(offset);
3038 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3042 p = xdr_reserve_space(xdr, 4);
3045 *p++ = xdr_one; /* mark entry present */
3046 cookie_offset = xdr->buf->len;
3047 p = xdr_reserve_space(xdr, 3*4 + namlen);
3050 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3051 p = xdr_encode_array(p, name, namlen); /* name length & name */
3053 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3057 case nfserr_resource:
3058 nfserr = nfserr_toosmall;
3061 xdr_truncate_encode(xdr, start_offset);
3063 case nfserr_jukebox:
3065 * The pseudoroot should only display dentries that lead to
3066 * exports. If we get EJUKEBOX here, then we can't tell whether
3067 * this entry should be included. Just fail the whole READDIR
3068 * with NFS4ERR_DELAY in that case, and hope that the situation
3069 * will resolve itself by the client's next attempt.
3071 if (cd->rd_fhp->fh_export->ex_flags & NFSEXP_V4ROOT)
3076 * If the client requested the RDATTR_ERROR attribute,
3077 * we stuff the error code into this attribute
3078 * and continue. If this attribute was not requested,
3079 * then in accordance with the spec, we fail the
3080 * entire READDIR operation(!)
3082 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3084 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3086 nfserr = nfserr_toosmall;
3090 nfserr = nfserr_toosmall;
3091 entry_bytes = xdr->buf->len - start_offset;
3092 if (entry_bytes > cd->rd_maxcount)
3094 cd->rd_maxcount -= entry_bytes;
3096 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3097 * notes that it could be zero. If it is zero, then the server
3098 * should enforce only the rd_maxcount value.
3100 if (cd->rd_dircount) {
3101 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3102 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3104 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3105 if (!cd->rd_dircount)
3106 cd->rd_maxcount = 0;
3109 cd->cookie_offset = cookie_offset;
3111 cd->common.err = nfs_ok;
3114 xdr_truncate_encode(xdr, start_offset);
3115 cd->common.err = nfserr;
3120 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3124 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3126 return nfserr_resource;
3127 *p++ = cpu_to_be32(sid->si_generation);
3128 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3129 sizeof(stateid_opaque_t));
3134 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3136 struct xdr_stream *xdr = &resp->xdr;
3139 p = xdr_reserve_space(xdr, 8);
3141 return nfserr_resource;
3142 *p++ = cpu_to_be32(access->ac_supported);
3143 *p++ = cpu_to_be32(access->ac_resp_access);
3147 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3149 struct xdr_stream *xdr = &resp->xdr;
3152 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3154 return nfserr_resource;
3155 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3156 NFS4_MAX_SESSIONID_LEN);
3157 *p++ = cpu_to_be32(bcts->dir);
3158 /* Upshifting from TCP to RDMA is not supported */
3159 *p++ = cpu_to_be32(0);
3164 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3166 struct xdr_stream *xdr = &resp->xdr;
3168 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
3173 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3175 struct xdr_stream *xdr = &resp->xdr;
3178 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3180 return nfserr_resource;
3181 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3182 NFS4_VERIFIER_SIZE);
3187 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3189 struct xdr_stream *xdr = &resp->xdr;
3192 p = xdr_reserve_space(xdr, 20);
3194 return nfserr_resource;
3195 encode_cinfo(p, &create->cr_cinfo);
3196 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3197 create->cr_bmval[1], create->cr_bmval[2]);
3202 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3204 struct svc_fh *fhp = getattr->ga_fhp;
3205 struct xdr_stream *xdr = &resp->xdr;
3207 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3208 getattr->ga_bmval, resp->rqstp, 0);
3212 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3214 struct xdr_stream *xdr = &resp->xdr;
3215 struct svc_fh *fhp = *fhpp;
3219 len = fhp->fh_handle.fh_size;
3220 p = xdr_reserve_space(xdr, len + 4);
3222 return nfserr_resource;
3223 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3228 * Including all fields other than the name, a LOCK4denied structure requires
3229 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3232 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3234 struct xdr_netobj *conf = &ld->ld_owner;
3238 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3241 * Don't fail to return the result just because we can't
3242 * return the conflicting open:
3250 return nfserr_resource;
3252 p = xdr_encode_hyper(p, ld->ld_start);
3253 p = xdr_encode_hyper(p, ld->ld_length);
3254 *p++ = cpu_to_be32(ld->ld_type);
3256 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3257 p = xdr_encode_opaque(p, conf->data, conf->len);
3259 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3260 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3261 *p++ = cpu_to_be32(0); /* length of owner name */
3263 return nfserr_denied;
3267 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3269 struct xdr_stream *xdr = &resp->xdr;
3272 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3273 else if (nfserr == nfserr_denied)
3274 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3280 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3282 struct xdr_stream *xdr = &resp->xdr;
3284 if (nfserr == nfserr_denied)
3285 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3290 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3292 struct xdr_stream *xdr = &resp->xdr;
3294 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3299 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3301 struct xdr_stream *xdr = &resp->xdr;
3304 p = xdr_reserve_space(xdr, 20);
3306 return nfserr_resource;
3307 p = encode_cinfo(p, &link->li_cinfo);
3313 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3315 struct xdr_stream *xdr = &resp->xdr;
3318 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3321 p = xdr_reserve_space(xdr, 24);
3323 return nfserr_resource;
3324 p = encode_cinfo(p, &open->op_cinfo);
3325 *p++ = cpu_to_be32(open->op_rflags);
3327 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3332 p = xdr_reserve_space(xdr, 4);
3334 return nfserr_resource;
3336 *p++ = cpu_to_be32(open->op_delegate_type);
3337 switch (open->op_delegate_type) {
3338 case NFS4_OPEN_DELEGATE_NONE:
3340 case NFS4_OPEN_DELEGATE_READ:
3341 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3344 p = xdr_reserve_space(xdr, 20);
3346 return nfserr_resource;
3347 *p++ = cpu_to_be32(open->op_recall);
3350 * TODO: ACE's in delegations
3352 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3353 *p++ = cpu_to_be32(0);
3354 *p++ = cpu_to_be32(0);
3355 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3357 case NFS4_OPEN_DELEGATE_WRITE:
3358 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3361 p = xdr_reserve_space(xdr, 32);
3363 return nfserr_resource;
3364 *p++ = cpu_to_be32(open->op_recall);
3367 * TODO: space_limit's in delegations
3369 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3370 *p++ = cpu_to_be32(~(u32)0);
3371 *p++ = cpu_to_be32(~(u32)0);
3374 * TODO: ACE's in delegations
3376 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3377 *p++ = cpu_to_be32(0);
3378 *p++ = cpu_to_be32(0);
3379 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3381 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3382 switch (open->op_why_no_deleg) {
3383 case WND4_CONTENTION:
3385 p = xdr_reserve_space(xdr, 8);
3387 return nfserr_resource;
3388 *p++ = cpu_to_be32(open->op_why_no_deleg);
3389 /* deleg signaling not supported yet: */
3390 *p++ = cpu_to_be32(0);
3393 p = xdr_reserve_space(xdr, 4);
3395 return nfserr_resource;
3396 *p++ = cpu_to_be32(open->op_why_no_deleg);
3402 /* XXX save filehandle here */
3407 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3409 struct xdr_stream *xdr = &resp->xdr;
3411 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3415 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3417 struct xdr_stream *xdr = &resp->xdr;
3419 return nfsd4_encode_stateid(xdr, &od->od_stateid);
3422 static __be32 nfsd4_encode_splice_read(
3423 struct nfsd4_compoundres *resp,
3424 struct nfsd4_read *read,
3425 struct file *file, unsigned long maxcount)
3427 struct xdr_stream *xdr = &resp->xdr;
3428 struct xdr_buf *buf = xdr->buf;
3433 __be32 *p = xdr->p - 2;
3435 /* Make sure there will be room for padding if needed */
3436 if (xdr->end - xdr->p < 1)
3437 return nfserr_resource;
3440 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3441 read->rd_offset, &maxcount);
3444 * nfsd_splice_actor may have already messed with the
3445 * page length; reset it so as not to confuse
3446 * xdr_truncate_encode:
3452 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3453 d_inode(read->rd_fhp->fh_dentry)->i_size);
3455 *(p++) = htonl(eof);
3456 *(p++) = htonl(maxcount);
3458 buf->page_len = maxcount;
3459 buf->len += maxcount;
3460 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3463 /* Use rest of head for padding and remaining ops: */
3464 buf->tail[0].iov_base = xdr->p;
3465 buf->tail[0].iov_len = 0;
3466 xdr->iov = buf->tail;
3468 int pad = 4 - (maxcount&3);
3472 buf->tail[0].iov_base += maxcount&3;
3473 buf->tail[0].iov_len = pad;
3477 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3478 buf->buflen - buf->len);
3479 buf->buflen = buf->len + space_left;
3480 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3485 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3486 struct nfsd4_read *read,
3487 struct file *file, unsigned long maxcount)
3489 struct xdr_stream *xdr = &resp->xdr;
3492 int starting_len = xdr->buf->len - 8;
3504 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3505 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3507 resp->rqstp->rq_vec[v].iov_base = p;
3508 resp->rqstp->rq_vec[v].iov_len = thislen;
3513 thislen = min_t(long, len, PAGE_SIZE);
3514 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3516 resp->rqstp->rq_vec[v].iov_base = p;
3517 resp->rqstp->rq_vec[v].iov_len = thislen;
3524 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3525 read->rd_vlen, &maxcount);
3528 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3530 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3531 d_inode(read->rd_fhp->fh_dentry)->i_size);
3534 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3535 tmp = htonl(maxcount);
3536 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3538 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3539 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3546 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3547 struct nfsd4_read *read)
3549 unsigned long maxcount;
3550 struct xdr_stream *xdr = &resp->xdr;
3551 struct file *file = read->rd_filp;
3552 int starting_len = xdr->buf->len;
3553 struct raparms *ra = NULL;
3556 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3558 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3559 return nfserr_resource;
3561 if (resp->xdr.buf->page_len &&
3562 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3564 return nfserr_serverfault;
3566 xdr_commit_encode(xdr);
3568 maxcount = svc_max_payload(resp->rqstp);
3569 maxcount = min_t(unsigned long, maxcount,
3570 (xdr->buf->buflen - xdr->buf->len));
3571 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3573 if (read->rd_tmp_file)
3574 ra = nfsd_init_raparms(file);
3576 if (file->f_op->splice_read &&
3577 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3578 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3580 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3583 nfsd_put_raparams(file, ra);
3586 xdr_truncate_encode(xdr, starting_len);
3592 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3597 struct xdr_stream *xdr = &resp->xdr;
3598 int length_offset = xdr->buf->len;
3601 p = xdr_reserve_space(xdr, 4);
3603 return nfserr_resource;
3604 maxcount = PAGE_SIZE;
3606 p = xdr_reserve_space(xdr, maxcount);
3608 return nfserr_resource;
3610 * XXX: By default, vfs_readlink() will truncate symlinks if they
3611 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3612 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3613 * that truncation occurred, and return NFS4ERR_RESOURCE.
3615 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3616 (char *)p, &maxcount);
3617 if (nfserr == nfserr_isdir)
3618 nfserr = nfserr_inval;
3620 xdr_truncate_encode(xdr, length_offset);
3624 wire_count = htonl(maxcount);
3625 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3626 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3628 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3629 &zero, 4 - (maxcount&3));
3634 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3640 struct xdr_stream *xdr = &resp->xdr;
3641 int starting_len = xdr->buf->len;
3644 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3646 return nfserr_resource;
3648 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3649 *p++ = cpu_to_be32(0);
3650 *p++ = cpu_to_be32(0);
3651 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3652 - (char *)resp->xdr.buf->head[0].iov_base;
3655 * Number of bytes left for directory entries allowing for the
3656 * final 8 bytes of the readdir and a following failed op:
3658 bytes_left = xdr->buf->buflen - xdr->buf->len
3659 - COMPOUND_ERR_SLACK_SPACE - 8;
3660 if (bytes_left < 0) {
3661 nfserr = nfserr_resource;
3664 maxcount = svc_max_payload(resp->rqstp);
3665 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
3667 * Note the rfc defines rd_maxcount as the size of the
3668 * READDIR4resok structure, which includes the verifier above
3669 * and the 8 bytes encoded at the end of this function:
3671 if (maxcount < 16) {
3672 nfserr = nfserr_toosmall;
3675 maxcount = min_t(int, maxcount-16, bytes_left);
3677 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3678 if (!readdir->rd_dircount)
3679 readdir->rd_dircount = svc_max_payload(resp->rqstp);
3682 readdir->rd_maxcount = maxcount;
3683 readdir->common.err = 0;
3684 readdir->cookie_offset = 0;
3686 offset = readdir->rd_cookie;
3687 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3689 &readdir->common, nfsd4_encode_dirent);
3690 if (nfserr == nfs_ok &&
3691 readdir->common.err == nfserr_toosmall &&
3692 xdr->buf->len == starting_len + 8) {
3693 /* nothing encoded; which limit did we hit?: */
3694 if (maxcount - 16 < bytes_left)
3695 /* It was the fault of rd_maxcount: */
3696 nfserr = nfserr_toosmall;
3698 /* We ran out of buffer space: */
3699 nfserr = nfserr_resource;
3704 if (readdir->cookie_offset) {
3705 wire_offset = cpu_to_be64(offset);
3706 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3710 p = xdr_reserve_space(xdr, 8);
3715 *p++ = 0; /* no more entries */
3716 *p++ = htonl(readdir->common.err == nfserr_eof);
3720 xdr_truncate_encode(xdr, starting_len);
3725 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3727 struct xdr_stream *xdr = &resp->xdr;
3730 p = xdr_reserve_space(xdr, 20);
3732 return nfserr_resource;
3733 p = encode_cinfo(p, &remove->rm_cinfo);
3738 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3740 struct xdr_stream *xdr = &resp->xdr;
3743 p = xdr_reserve_space(xdr, 40);
3745 return nfserr_resource;
3746 p = encode_cinfo(p, &rename->rn_sinfo);
3747 p = encode_cinfo(p, &rename->rn_tinfo);
3752 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
3754 u32 i, nflavs, supported;
3755 struct exp_flavor_info *flavs;
3756 struct exp_flavor_info def_flavs[2];
3757 __be32 *p, *flavorsp;
3758 static bool report = true;
3760 if (exp->ex_nflavors) {
3761 flavs = exp->ex_flavors;
3762 nflavs = exp->ex_nflavors;
3763 } else { /* Handling of some defaults in absence of real secinfo: */
3765 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3767 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3768 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3769 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3771 flavs[0].pseudoflavor
3772 = svcauth_gss_flavor(exp->ex_client);
3775 flavs[0].pseudoflavor
3776 = exp->ex_client->flavour->flavour;
3781 p = xdr_reserve_space(xdr, 4);
3783 return nfserr_resource;
3784 flavorsp = p++; /* to be backfilled later */
3786 for (i = 0; i < nflavs; i++) {
3787 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3788 struct rpcsec_gss_info info;
3790 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3792 p = xdr_reserve_space(xdr, 4 + 4 +
3793 XDR_LEN(info.oid.len) + 4 + 4);
3795 return nfserr_resource;
3796 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3797 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3798 *p++ = cpu_to_be32(info.qop);
3799 *p++ = cpu_to_be32(info.service);
3800 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3802 p = xdr_reserve_space(xdr, 4);
3804 return nfserr_resource;
3805 *p++ = cpu_to_be32(pf);
3808 pr_warn("NFS: SECINFO: security flavor %u "
3809 "is not supported\n", pf);
3813 if (nflavs != supported)
3815 *flavorsp = htonl(supported);
3820 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3821 struct nfsd4_secinfo *secinfo)
3823 struct xdr_stream *xdr = &resp->xdr;
3825 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
3829 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3830 struct nfsd4_secinfo_no_name *secinfo)
3832 struct xdr_stream *xdr = &resp->xdr;
3834 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
3838 * The SETATTR encode routine is special -- it always encodes a bitmap,
3839 * regardless of the error status.
3842 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3844 struct xdr_stream *xdr = &resp->xdr;
3847 p = xdr_reserve_space(xdr, 16);
3849 return nfserr_resource;
3851 *p++ = cpu_to_be32(3);
3852 *p++ = cpu_to_be32(0);
3853 *p++ = cpu_to_be32(0);
3854 *p++ = cpu_to_be32(0);
3857 *p++ = cpu_to_be32(3);
3858 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3859 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3860 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3866 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3868 struct xdr_stream *xdr = &resp->xdr;
3872 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3874 return nfserr_resource;
3875 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3876 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3877 NFS4_VERIFIER_SIZE);
3879 else if (nfserr == nfserr_clid_inuse) {
3880 p = xdr_reserve_space(xdr, 8);
3882 return nfserr_resource;
3883 *p++ = cpu_to_be32(0);
3884 *p++ = cpu_to_be32(0);
3890 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3892 struct xdr_stream *xdr = &resp->xdr;
3895 p = xdr_reserve_space(xdr, 16);
3897 return nfserr_resource;
3898 *p++ = cpu_to_be32(write->wr_bytes_written);
3899 *p++ = cpu_to_be32(write->wr_how_written);
3900 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3901 NFS4_VERIFIER_SIZE);
3906 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3907 struct nfsd4_exchange_id *exid)
3909 struct xdr_stream *xdr = &resp->xdr;
3914 int server_scope_sz;
3915 uint64_t minor_id = 0;
3917 major_id = utsname()->nodename;
3918 major_id_sz = strlen(major_id);
3919 server_scope = utsname()->nodename;
3920 server_scope_sz = strlen(server_scope);
3922 p = xdr_reserve_space(xdr,
3923 8 /* eir_clientid */ +
3924 4 /* eir_sequenceid */ +
3928 return nfserr_resource;
3930 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3931 *p++ = cpu_to_be32(exid->seqid);
3932 *p++ = cpu_to_be32(exid->flags);
3934 *p++ = cpu_to_be32(exid->spa_how);
3936 switch (exid->spa_how) {
3940 /* spo_must_enforce bitmap: */
3941 nfserr = nfsd4_encode_bitmap(xdr,
3942 exid->spo_must_enforce[0],
3943 exid->spo_must_enforce[1],
3944 exid->spo_must_enforce[2]);
3947 /* spo_must_allow bitmap: */
3948 nfserr = nfsd4_encode_bitmap(xdr,
3949 exid->spo_must_allow[0],
3950 exid->spo_must_allow[1],
3951 exid->spo_must_allow[2]);
3959 p = xdr_reserve_space(xdr,
3960 8 /* so_minor_id */ +
3961 4 /* so_major_id.len */ +
3962 (XDR_QUADLEN(major_id_sz) * 4) +
3963 4 /* eir_server_scope.len */ +
3964 (XDR_QUADLEN(server_scope_sz) * 4) +
3965 4 /* eir_server_impl_id.count (0) */);
3967 return nfserr_resource;
3969 /* The server_owner struct */
3970 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3972 p = xdr_encode_opaque(p, major_id, major_id_sz);
3975 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3977 /* Implementation id */
3978 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3983 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3984 struct nfsd4_create_session *sess)
3986 struct xdr_stream *xdr = &resp->xdr;
3989 p = xdr_reserve_space(xdr, 24);
3991 return nfserr_resource;
3992 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3993 NFS4_MAX_SESSIONID_LEN);
3994 *p++ = cpu_to_be32(sess->seqid);
3995 *p++ = cpu_to_be32(sess->flags);
3997 p = xdr_reserve_space(xdr, 28);
3999 return nfserr_resource;
4000 *p++ = cpu_to_be32(0); /* headerpadsz */
4001 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4002 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4003 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4004 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4005 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4006 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4008 if (sess->fore_channel.nr_rdma_attrs) {
4009 p = xdr_reserve_space(xdr, 4);
4011 return nfserr_resource;
4012 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4015 p = xdr_reserve_space(xdr, 28);
4017 return nfserr_resource;
4018 *p++ = cpu_to_be32(0); /* headerpadsz */
4019 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4020 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4021 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4022 *p++ = cpu_to_be32(sess->back_channel.maxops);
4023 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4024 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4026 if (sess->back_channel.nr_rdma_attrs) {
4027 p = xdr_reserve_space(xdr, 4);
4029 return nfserr_resource;
4030 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4036 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4037 struct nfsd4_sequence *seq)
4039 struct xdr_stream *xdr = &resp->xdr;
4042 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4044 return nfserr_resource;
4045 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4046 NFS4_MAX_SESSIONID_LEN);
4047 *p++ = cpu_to_be32(seq->seqid);
4048 *p++ = cpu_to_be32(seq->slotid);
4049 /* Note slotid's are numbered from zero: */
4050 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4051 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4052 *p++ = cpu_to_be32(seq->status_flags);
4054 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4059 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4060 struct nfsd4_test_stateid *test_stateid)
4062 struct xdr_stream *xdr = &resp->xdr;
4063 struct nfsd4_test_stateid_id *stateid, *next;
4066 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4068 return nfserr_resource;
4069 *p++ = htonl(test_stateid->ts_num_ids);
4071 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4072 *p++ = stateid->ts_id_status;
4078 #ifdef CONFIG_NFSD_PNFS
4080 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4081 struct nfsd4_getdeviceinfo *gdev)
4083 struct xdr_stream *xdr = &resp->xdr;
4084 const struct nfsd4_layout_ops *ops;
4085 u32 starting_len = xdr->buf->len, needed_len;
4088 p = xdr_reserve_space(xdr, 4);
4090 return nfserr_resource;
4092 *p++ = cpu_to_be32(gdev->gd_layout_type);
4094 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4095 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4098 * We don't bother to burden the layout drivers with
4099 * enforcing gd_maxcount, just tell the client to
4100 * come back with a bigger buffer if it's not enough.
4102 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4107 if (gdev->gd_notify_types) {
4108 p = xdr_reserve_space(xdr, 4 + 4);
4110 return nfserr_resource;
4111 *p++ = cpu_to_be32(1); /* bitmap length */
4112 *p++ = cpu_to_be32(gdev->gd_notify_types);
4114 p = xdr_reserve_space(xdr, 4);
4116 return nfserr_resource;
4122 dprintk("%s: maxcount too small\n", __func__);
4123 needed_len = xdr->buf->len + 4 /* notifications */;
4124 xdr_truncate_encode(xdr, starting_len);
4125 p = xdr_reserve_space(xdr, 4);
4127 return nfserr_resource;
4128 *p++ = cpu_to_be32(needed_len);
4129 return nfserr_toosmall;
4133 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4134 struct nfsd4_layoutget *lgp)
4136 struct xdr_stream *xdr = &resp->xdr;
4137 const struct nfsd4_layout_ops *ops;
4140 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4142 return nfserr_resource;
4144 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4145 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4146 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4147 sizeof(stateid_opaque_t));
4149 *p++ = cpu_to_be32(1); /* we always return a single layout */
4150 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4151 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4152 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4153 *p++ = cpu_to_be32(lgp->lg_layout_type);
4155 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4156 return ops->encode_layoutget(xdr, lgp);
4160 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4161 struct nfsd4_layoutcommit *lcp)
4163 struct xdr_stream *xdr = &resp->xdr;
4166 p = xdr_reserve_space(xdr, 4);
4168 return nfserr_resource;
4169 *p++ = cpu_to_be32(lcp->lc_size_chg);
4170 if (lcp->lc_size_chg) {
4171 p = xdr_reserve_space(xdr, 8);
4173 return nfserr_resource;
4174 p = xdr_encode_hyper(p, lcp->lc_newsize);
4181 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4182 struct nfsd4_layoutreturn *lrp)
4184 struct xdr_stream *xdr = &resp->xdr;
4187 p = xdr_reserve_space(xdr, 4);
4189 return nfserr_resource;
4190 *p++ = cpu_to_be32(lrp->lrs_present);
4191 if (lrp->lrs_present)
4192 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4195 #endif /* CONFIG_NFSD_PNFS */
4198 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4202 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4204 return nfserr_resource;
4206 *p++ = cpu_to_be32(0);
4207 p = xdr_encode_hyper(p, write->wr_bytes_written);
4208 *p++ = cpu_to_be32(write->wr_stable_how);
4209 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4210 NFS4_VERIFIER_SIZE);
4215 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4216 struct nfsd4_copy *copy)
4220 nfserr = nfsd42_encode_write_res(resp, ©->cp_res);
4224 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4225 *p++ = cpu_to_be32(copy->cp_consecutive);
4226 *p++ = cpu_to_be32(copy->cp_synchronous);
4231 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4232 struct nfsd4_seek *seek)
4236 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4237 *p++ = cpu_to_be32(seek->seek_eof);
4238 p = xdr_encode_hyper(p, seek->seek_pos);
4244 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4249 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4252 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4253 * since we don't need to filter out obsolete ops as this is
4254 * done in the decoding phase.
4256 static const nfsd4_enc nfsd4_enc_ops[] = {
4257 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4258 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4259 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4260 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4261 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4262 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4264 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4265 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4266 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4267 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4268 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4269 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4270 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4271 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4272 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4273 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4274 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4275 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4276 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4277 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4278 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4279 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4280 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4281 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4282 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4283 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4284 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4285 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4286 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4287 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4288 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4289 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4290 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4291 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4292 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4293 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4295 /* NFSv4.1 operations */
4296 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4297 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4298 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4299 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4300 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4301 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4302 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4303 #ifdef CONFIG_NFSD_PNFS
4304 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4305 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4307 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4308 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4310 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4311 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4312 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4313 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4316 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4317 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4318 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4319 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4320 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4321 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4322 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4324 /* NFSv4.2 operations */
4325 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4326 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
4327 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4328 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4329 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4330 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4331 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4332 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4333 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4334 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4335 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4336 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4337 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4341 * Calculate whether we still have space to encode repsize bytes.
4342 * There are two considerations:
4343 * - For NFS versions >=4.1, the size of the reply must stay within
4345 * - For all NFS versions, we must stay within limited preallocated
4348 * This is called before the operation is processed, so can only provide
4349 * an upper estimate. For some nonidempotent operations (such as
4350 * getattr), it's not necessarily a problem if that estimate is wrong,
4351 * as we can fail it after processing without significant side effects.
4353 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4355 struct xdr_buf *buf = &resp->rqstp->rq_res;
4356 struct nfsd4_slot *slot = resp->cstate.slot;
4358 if (buf->len + respsize <= buf->buflen)
4360 if (!nfsd4_has_session(&resp->cstate))
4361 return nfserr_resource;
4362 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4364 return nfserr_rep_too_big_to_cache;
4366 return nfserr_rep_too_big;
4370 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4372 struct xdr_stream *xdr = &resp->xdr;
4373 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4374 struct svc_rqst *rqstp = resp->rqstp;
4375 const struct nfsd4_operation *opdesc = op->opdesc;
4376 int post_err_offset;
4380 p = xdr_reserve_space(xdr, 8);
4385 *p++ = cpu_to_be32(op->opnum);
4386 post_err_offset = xdr->buf->len;
4388 if (op->opnum == OP_ILLEGAL)
4390 if (op->status && opdesc &&
4391 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
4393 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4394 !nfsd4_enc_ops[op->opnum]);
4395 encoder = nfsd4_enc_ops[op->opnum];
4396 op->status = encoder(resp, op->status, &op->u);
4397 if (opdesc && opdesc->op_release)
4398 opdesc->op_release(&op->u);
4399 xdr_commit_encode(xdr);
4401 /* nfsd4_check_resp_size guarantees enough room for error status */
4403 int space_needed = 0;
4404 if (!nfsd4_last_compound_op(rqstp))
4405 space_needed = COMPOUND_ERR_SLACK_SPACE;
4406 op->status = nfsd4_check_resp_size(resp, space_needed);
4408 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4409 struct nfsd4_slot *slot = resp->cstate.slot;
4411 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4412 op->status = nfserr_rep_too_big_to_cache;
4414 op->status = nfserr_rep_too_big;
4416 if (op->status == nfserr_resource ||
4417 op->status == nfserr_rep_too_big ||
4418 op->status == nfserr_rep_too_big_to_cache) {
4420 * The operation may have already been encoded or
4421 * partially encoded. No op returns anything additional
4422 * in the case of one of these three errors, so we can
4423 * just truncate back to after the status. But it's a
4424 * bug if we had to do this on a non-idempotent op:
4426 warn_on_nonidempotent_op(op);
4427 xdr_truncate_encode(xdr, post_err_offset);
4430 int len = xdr->buf->len - post_err_offset;
4432 so->so_replay.rp_status = op->status;
4433 so->so_replay.rp_buflen = len;
4434 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4435 so->so_replay.rp_buf, len);
4438 /* Note that op->status is already in network byte order: */
4439 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4443 * Encode the reply stored in the stateowner reply cache
4445 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4446 * previously sent already encoded operation.
4449 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4452 struct nfs4_replay *rp = op->replay;
4456 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4461 *p++ = cpu_to_be32(op->opnum);
4462 *p++ = rp->rp_status; /* already xdr'ed */
4464 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4468 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
4470 return xdr_ressize_check(rqstp, p);
4473 void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
4475 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4477 if (args->ops != args->iops) {
4479 args->ops = args->iops;
4483 while (args->to_free) {
4484 struct svcxdr_tmpbuf *tb = args->to_free;
4485 args->to_free = tb->next;
4491 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
4493 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4495 if (rqstp->rq_arg.head[0].iov_len % 4) {
4496 /* client is nuts */
4497 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4498 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4502 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4503 args->pagelist = rqstp->rq_arg.pages;
4504 args->pagelen = rqstp->rq_arg.page_len;
4507 args->to_free = NULL;
4508 args->ops = args->iops;
4509 args->rqstp = rqstp;
4511 return !nfsd4_decode_compound(args);
4515 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
4518 * All that remains is to write the tag and operation count...
4520 struct nfsd4_compoundres *resp = rqstp->rq_resp;
4521 struct xdr_buf *buf = resp->xdr.buf;
4523 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4524 buf->tail[0].iov_len);
4526 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4529 *p++ = htonl(resp->taglen);
4530 memcpy(p, resp->tag, resp->taglen);
4531 p += XDR_QUADLEN(resp->taglen);
4532 *p++ = htonl(resp->opcnt);
4534 nfsd4_sequence_done(resp);