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/fs_struct.h>
37 #include <linux/file.h>
38 #include <linux/slab.h>
39 #include <linux/namei.h>
40 #include <linux/statfs.h>
41 #include <linux/utsname.h>
42 #include <linux/pagemap.h>
43 #include <linux/sunrpc/svcauth_gss.h>
54 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
55 #include <linux/security.h>
59 #define NFSDDBG_FACILITY NFSDDBG_XDR
61 const u32 nfsd_suppattrs[3][3] = {
62 {NFSD4_SUPPORTED_ATTRS_WORD0,
63 NFSD4_SUPPORTED_ATTRS_WORD1,
64 NFSD4_SUPPORTED_ATTRS_WORD2},
66 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
67 NFSD4_1_SUPPORTED_ATTRS_WORD1,
68 NFSD4_1_SUPPORTED_ATTRS_WORD2},
70 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
71 NFSD4_1_SUPPORTED_ATTRS_WORD1,
72 NFSD4_2_SUPPORTED_ATTRS_WORD2},
76 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
77 * directory in order to indicate to the client that a filesystem boundary is present
78 * We use a fixed fsid for a referral
80 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
81 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
84 check_filename(char *str, int len)
90 if (isdotent(str, len))
91 return nfserr_badname;
92 for (i = 0; i < len; i++)
94 return nfserr_badname;
101 #define DECODE_TAIL \
106 dprintk("NFSD: xdr error (%s:%d)\n", \
107 __FILE__, __LINE__); \
108 status = nfserr_bad_xdr; \
111 #define READMEM(x,nbytes) do { \
113 p += XDR_QUADLEN(nbytes); \
115 #define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
119 dprintk("NFSD: xdr error (%s:%d)\n", \
120 __FILE__, __LINE__); \
123 p += XDR_QUADLEN(nbytes); \
125 #define COPYMEM(x,nbytes) do { \
126 memcpy((x), p, nbytes); \
127 p += XDR_QUADLEN(nbytes); \
130 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
131 #define READ_BUF(nbytes) do { \
132 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
134 argp->p += XDR_QUADLEN(nbytes); \
135 } else if (!(p = read_buf(argp, nbytes))) { \
136 dprintk("NFSD: xdr error (%s:%d)\n", \
137 __FILE__, __LINE__); \
142 static void next_decode_page(struct nfsd4_compoundargs *argp)
144 argp->p = page_address(argp->pagelist[0]);
146 if (argp->pagelen < PAGE_SIZE) {
147 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
150 argp->end = argp->p + (PAGE_SIZE>>2);
151 argp->pagelen -= PAGE_SIZE;
155 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
157 /* We want more bytes than seem to be available.
158 * Maybe we need a new page, maybe we have just run out
160 unsigned int avail = (char *)argp->end - (char *)argp->p;
162 if (avail + argp->pagelen < nbytes)
164 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
166 /* ok, we can do it with the current plus the next page */
167 if (nbytes <= sizeof(argp->tmp))
171 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
177 * The following memcpy is safe because read_buf is always
178 * called with nbytes > avail, and the two cases above both
179 * guarantee p points to at least nbytes bytes.
181 memcpy(p, argp->p, avail);
182 next_decode_page(argp);
183 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
184 argp->p += XDR_QUADLEN(nbytes - avail);
188 static int zero_clientid(clientid_t *clid)
190 return (clid->cl_boot == 0) && (clid->cl_id == 0);
194 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
195 * @argp: NFSv4 compound argument structure
196 * @p: pointer to be freed (with kfree())
198 * Marks @p to be freed when processing the compound operation
199 * described in @argp finishes.
202 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
204 struct svcxdr_tmpbuf *tb;
206 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
209 tb->next = argp->to_free;
215 * For xdr strings that need to be passed to other kernel api's
216 * as null-terminated strings.
218 * Note null-terminating in place usually isn't safe since the
219 * buffer might end on a page boundary.
222 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
224 char *p = svcxdr_tmpalloc(argp, len + 1);
234 * savemem - duplicate a chunk of memory for later processing
235 * @argp: NFSv4 compound argument structure to be freed with
236 * @p: pointer to be duplicated
237 * @nbytes: length to be duplicated
239 * Returns a pointer to a copy of @nbytes bytes of memory at @p
240 * that are preserved until processing of the NFSv4 compound
241 * operation described by @argp finishes.
243 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
247 ret = svcxdr_tmpalloc(argp, nbytes);
250 memcpy(ret, p, nbytes);
255 * We require the high 32 bits of 'seconds' to be 0, and
256 * we ignore all 32 bits of 'nseconds'.
259 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
265 p = xdr_decode_hyper(p, &sec);
267 tv->tv_nsec = be32_to_cpup(p++);
268 if (tv->tv_nsec >= (u32)1000000000)
275 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
285 bmlen = be32_to_cpup(p++);
289 READ_BUF(bmlen << 2);
291 bmval[0] = be32_to_cpup(p++);
293 bmval[1] = be32_to_cpup(p++);
295 bmval[2] = be32_to_cpup(p++);
301 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
302 struct iattr *iattr, struct nfs4_acl **acl,
303 struct xdr_netobj *label, int *umask)
305 int expected_len, len = 0;
311 if ((status = nfsd4_decode_bitmap(argp, bmval)))
314 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
315 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
316 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
317 if (nfsd_attrs_supported(argp->minorversion, bmval))
319 return nfserr_attrnotsupp;
323 expected_len = be32_to_cpup(p++);
325 if (bmval[0] & FATTR4_WORD0_SIZE) {
328 p = xdr_decode_hyper(p, &iattr->ia_size);
329 iattr->ia_valid |= ATTR_SIZE;
331 if (bmval[0] & FATTR4_WORD0_ACL) {
333 struct nfs4_ace *ace;
335 READ_BUF(4); len += 4;
336 nace = be32_to_cpup(p++);
338 if (nace > NFS4_ACL_MAX)
341 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
343 return nfserr_jukebox;
345 (*acl)->naces = nace;
346 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
347 READ_BUF(16); len += 16;
348 ace->type = be32_to_cpup(p++);
349 ace->flag = be32_to_cpup(p++);
350 ace->access_mask = be32_to_cpup(p++);
351 dummy32 = be32_to_cpup(p++);
353 len += XDR_QUADLEN(dummy32) << 2;
354 READMEM(buf, dummy32);
355 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
357 if (ace->whotype != NFS4_ACL_WHO_NAMED)
359 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
360 status = nfsd_map_name_to_gid(argp->rqstp,
361 buf, dummy32, &ace->who_gid);
363 status = nfsd_map_name_to_uid(argp->rqstp,
364 buf, dummy32, &ace->who_uid);
370 if (bmval[1] & FATTR4_WORD1_MODE) {
373 iattr->ia_mode = be32_to_cpup(p++);
374 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
375 iattr->ia_valid |= ATTR_MODE;
377 if (bmval[1] & FATTR4_WORD1_OWNER) {
380 dummy32 = be32_to_cpup(p++);
382 len += (XDR_QUADLEN(dummy32) << 2);
383 READMEM(buf, dummy32);
384 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
386 iattr->ia_valid |= ATTR_UID;
388 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
391 dummy32 = be32_to_cpup(p++);
393 len += (XDR_QUADLEN(dummy32) << 2);
394 READMEM(buf, dummy32);
395 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
397 iattr->ia_valid |= ATTR_GID;
399 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
402 dummy32 = be32_to_cpup(p++);
404 case NFS4_SET_TO_CLIENT_TIME:
406 status = nfsd4_decode_time(argp, &iattr->ia_atime);
409 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
411 case NFS4_SET_TO_SERVER_TIME:
412 iattr->ia_valid |= ATTR_ATIME;
418 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
421 dummy32 = be32_to_cpup(p++);
423 case NFS4_SET_TO_CLIENT_TIME:
425 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
428 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
430 case NFS4_SET_TO_SERVER_TIME:
431 iattr->ia_valid |= ATTR_MTIME;
439 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
440 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
443 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
446 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
449 dummy32 = be32_to_cpup(p++);
451 if (dummy32 > NFS4_MAXLABELLEN)
452 return nfserr_badlabel;
453 len += (XDR_QUADLEN(dummy32) << 2);
454 READMEM(buf, dummy32);
455 label->len = dummy32;
456 label->data = svcxdr_dupstr(argp, buf, dummy32);
458 return nfserr_jukebox;
461 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
466 dummy32 = be32_to_cpup(p++);
467 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
468 dummy32 = be32_to_cpup(p++);
469 *umask = dummy32 & S_IRWXUGO;
470 iattr->ia_valid |= ATTR_MODE;
472 if (len != expected_len)
479 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
483 READ_BUF(sizeof(stateid_t));
484 sid->si_generation = be32_to_cpup(p++);
485 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
491 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
496 access->ac_req_access = be32_to_cpup(p++);
501 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
509 /* callback_sec_params4 */
511 nr_secflavs = be32_to_cpup(p++);
513 cbs->flavor = (u32)(-1);
515 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
517 for (i = 0; i < nr_secflavs; ++i) {
519 dummy = be32_to_cpup(p++);
522 /* Nothing to read */
523 if (cbs->flavor == (u32)(-1))
524 cbs->flavor = RPC_AUTH_NULL;
529 dummy = be32_to_cpup(p++);
532 dummy = be32_to_cpup(p++);
534 SAVEMEM(machine_name, dummy);
538 uid = be32_to_cpup(p++);
539 gid = be32_to_cpup(p++);
543 dummy = be32_to_cpup(p++);
545 if (cbs->flavor == (u32)(-1)) {
546 kuid_t kuid = make_kuid(&init_user_ns, uid);
547 kgid_t kgid = make_kgid(&init_user_ns, gid);
548 if (uid_valid(kuid) && gid_valid(kgid)) {
551 cbs->flavor = RPC_AUTH_UNIX;
553 dprintk("RPC_AUTH_UNIX with invalid"
554 "uid or gid ignoring!\n");
559 dprintk("RPC_AUTH_GSS callback secflavor "
563 dummy = be32_to_cpup(p++);
564 /* gcbp_handle_from_server */
565 dummy = be32_to_cpup(p++);
567 p += XDR_QUADLEN(dummy);
568 /* gcbp_handle_from_client */
570 dummy = be32_to_cpup(p++);
574 dprintk("Illegal callback secflavor\n");
581 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
586 bc->bc_cb_program = be32_to_cpup(p++);
587 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
592 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
596 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
597 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
598 bcts->dir = be32_to_cpup(p++);
599 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
600 * could help us figure out we should be using it. */
605 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
610 close->cl_seqid = be32_to_cpup(p++);
611 return nfsd4_decode_stateid(argp, &close->cl_stateid);
618 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
623 p = xdr_decode_hyper(p, &commit->co_offset);
624 commit->co_count = be32_to_cpup(p++);
630 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
635 create->cr_type = be32_to_cpup(p++);
636 switch (create->cr_type) {
639 create->cr_datalen = be32_to_cpup(p++);
640 READ_BUF(create->cr_datalen);
641 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
642 if (!create->cr_data)
643 return nfserr_jukebox;
648 create->cr_specdata1 = be32_to_cpup(p++);
649 create->cr_specdata2 = be32_to_cpup(p++);
659 create->cr_namelen = be32_to_cpup(p++);
660 READ_BUF(create->cr_namelen);
661 SAVEMEM(create->cr_name, create->cr_namelen);
662 if ((status = check_filename(create->cr_name, create->cr_namelen)))
665 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
666 &create->cr_acl, &create->cr_label,
667 ¤t->fs->umask);
675 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
677 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
681 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
683 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
687 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
692 link->li_namelen = be32_to_cpup(p++);
693 READ_BUF(link->li_namelen);
694 SAVEMEM(link->li_name, link->li_namelen);
695 if ((status = check_filename(link->li_name, link->li_namelen)))
702 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
707 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
710 lock->lk_type = be32_to_cpup(p++);
711 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
713 lock->lk_reclaim = be32_to_cpup(p++);
714 p = xdr_decode_hyper(p, &lock->lk_offset);
715 p = xdr_decode_hyper(p, &lock->lk_length);
716 lock->lk_is_new = be32_to_cpup(p++);
718 if (lock->lk_is_new) {
720 lock->lk_new_open_seqid = be32_to_cpup(p++);
721 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
724 READ_BUF(8 + sizeof(clientid_t));
725 lock->lk_new_lock_seqid = be32_to_cpup(p++);
726 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
727 lock->lk_new_owner.len = be32_to_cpup(p++);
728 READ_BUF(lock->lk_new_owner.len);
729 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
731 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
735 lock->lk_old_lock_seqid = be32_to_cpup(p++);
742 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
747 lockt->lt_type = be32_to_cpup(p++);
748 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
750 p = xdr_decode_hyper(p, &lockt->lt_offset);
751 p = xdr_decode_hyper(p, &lockt->lt_length);
752 COPYMEM(&lockt->lt_clientid, 8);
753 lockt->lt_owner.len = be32_to_cpup(p++);
754 READ_BUF(lockt->lt_owner.len);
755 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
761 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
766 locku->lu_type = be32_to_cpup(p++);
767 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
769 locku->lu_seqid = be32_to_cpup(p++);
770 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
774 p = xdr_decode_hyper(p, &locku->lu_offset);
775 p = xdr_decode_hyper(p, &locku->lu_length);
781 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
786 lookup->lo_len = be32_to_cpup(p++);
787 READ_BUF(lookup->lo_len);
788 SAVEMEM(lookup->lo_name, lookup->lo_len);
789 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
795 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
801 w = be32_to_cpup(p++);
802 *share_access = w & NFS4_SHARE_ACCESS_MASK;
803 *deleg_want = w & NFS4_SHARE_WANT_MASK;
805 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
807 switch (w & NFS4_SHARE_ACCESS_MASK) {
808 case NFS4_SHARE_ACCESS_READ:
809 case NFS4_SHARE_ACCESS_WRITE:
810 case NFS4_SHARE_ACCESS_BOTH:
813 return nfserr_bad_xdr;
815 w &= ~NFS4_SHARE_ACCESS_MASK;
818 if (!argp->minorversion)
819 return nfserr_bad_xdr;
820 switch (w & NFS4_SHARE_WANT_MASK) {
821 case NFS4_SHARE_WANT_NO_PREFERENCE:
822 case NFS4_SHARE_WANT_READ_DELEG:
823 case NFS4_SHARE_WANT_WRITE_DELEG:
824 case NFS4_SHARE_WANT_ANY_DELEG:
825 case NFS4_SHARE_WANT_NO_DELEG:
826 case NFS4_SHARE_WANT_CANCEL:
829 return nfserr_bad_xdr;
831 w &= ~NFS4_SHARE_WANT_MASK;
835 if (!deleg_when) /* open_downgrade */
838 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
839 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
840 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
841 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
845 return nfserr_bad_xdr;
848 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
853 *x = be32_to_cpup(p++);
854 /* Note: unlinke access bits, deny bits may be zero. */
855 if (*x & ~NFS4_SHARE_DENY_BOTH)
856 return nfserr_bad_xdr;
859 return nfserr_bad_xdr;
862 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
867 o->len = be32_to_cpup(p++);
869 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
870 return nfserr_bad_xdr;
873 SAVEMEM(o->data, o->len);
876 return nfserr_bad_xdr;
880 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
885 memset(open->op_bmval, 0, sizeof(open->op_bmval));
886 open->op_iattr.ia_valid = 0;
887 open->op_openowner = NULL;
889 open->op_xdr_error = 0;
890 /* seqid, share_access, share_deny, clientid, ownerlen */
892 open->op_seqid = be32_to_cpup(p++);
893 /* decode, yet ignore deleg_when until supported */
894 status = nfsd4_decode_share_access(argp, &open->op_share_access,
895 &open->op_deleg_want, &dummy);
898 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
901 READ_BUF(sizeof(clientid_t));
902 COPYMEM(&open->op_clientid, sizeof(clientid_t));
903 status = nfsd4_decode_opaque(argp, &open->op_owner);
907 open->op_create = be32_to_cpup(p++);
908 switch (open->op_create) {
909 case NFS4_OPEN_NOCREATE:
911 case NFS4_OPEN_CREATE:
912 current->fs->umask = 0;
914 open->op_createmode = be32_to_cpup(p++);
915 switch (open->op_createmode) {
916 case NFS4_CREATE_UNCHECKED:
917 case NFS4_CREATE_GUARDED:
918 status = nfsd4_decode_fattr(argp, open->op_bmval,
919 &open->op_iattr, &open->op_acl, &open->op_label,
920 ¤t->fs->umask);
924 case NFS4_CREATE_EXCLUSIVE:
925 READ_BUF(NFS4_VERIFIER_SIZE);
926 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
928 case NFS4_CREATE_EXCLUSIVE4_1:
929 if (argp->minorversion < 1)
931 READ_BUF(NFS4_VERIFIER_SIZE);
932 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
933 status = nfsd4_decode_fattr(argp, open->op_bmval,
934 &open->op_iattr, &open->op_acl, &open->op_label,
935 ¤t->fs->umask);
949 open->op_claim_type = be32_to_cpup(p++);
950 switch (open->op_claim_type) {
951 case NFS4_OPEN_CLAIM_NULL:
952 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
954 open->op_fname.len = be32_to_cpup(p++);
955 READ_BUF(open->op_fname.len);
956 SAVEMEM(open->op_fname.data, open->op_fname.len);
957 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
960 case NFS4_OPEN_CLAIM_PREVIOUS:
962 open->op_delegate_type = be32_to_cpup(p++);
964 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
965 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
969 open->op_fname.len = be32_to_cpup(p++);
970 READ_BUF(open->op_fname.len);
971 SAVEMEM(open->op_fname.data, open->op_fname.len);
972 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
975 case NFS4_OPEN_CLAIM_FH:
976 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
977 if (argp->minorversion < 1)
981 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
982 if (argp->minorversion < 1)
984 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
996 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1000 if (argp->minorversion >= 1)
1001 return nfserr_notsupp;
1003 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1007 open_conf->oc_seqid = be32_to_cpup(p++);
1013 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1017 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1021 open_down->od_seqid = be32_to_cpup(p++);
1022 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1023 &open_down->od_deleg_want, NULL);
1026 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1033 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1038 putfh->pf_fhlen = be32_to_cpup(p++);
1039 if (putfh->pf_fhlen > NFS4_FHSIZE)
1041 READ_BUF(putfh->pf_fhlen);
1042 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1048 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1050 if (argp->minorversion == 0)
1052 return nfserr_notsupp;
1056 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1060 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1064 p = xdr_decode_hyper(p, &read->rd_offset);
1065 read->rd_length = be32_to_cpup(p++);
1071 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1076 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1077 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1078 readdir->rd_dircount = be32_to_cpup(p++);
1079 readdir->rd_maxcount = be32_to_cpup(p++);
1080 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1087 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1092 remove->rm_namelen = be32_to_cpup(p++);
1093 READ_BUF(remove->rm_namelen);
1094 SAVEMEM(remove->rm_name, remove->rm_namelen);
1095 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1102 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1107 rename->rn_snamelen = be32_to_cpup(p++);
1108 READ_BUF(rename->rn_snamelen);
1109 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1111 rename->rn_tnamelen = be32_to_cpup(p++);
1112 READ_BUF(rename->rn_tnamelen);
1113 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1114 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1116 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1123 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1127 if (argp->minorversion >= 1)
1128 return nfserr_notsupp;
1130 READ_BUF(sizeof(clientid_t));
1131 COPYMEM(clientid, sizeof(clientid_t));
1137 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1138 struct nfsd4_secinfo *secinfo)
1143 secinfo->si_namelen = be32_to_cpup(p++);
1144 READ_BUF(secinfo->si_namelen);
1145 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1146 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1153 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1154 struct nfsd4_secinfo_no_name *sin)
1159 sin->sin_style = be32_to_cpup(p++);
1164 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1168 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1171 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1172 &setattr->sa_acl, &setattr->sa_label, NULL);
1176 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1180 if (argp->minorversion >= 1)
1181 return nfserr_notsupp;
1183 READ_BUF(NFS4_VERIFIER_SIZE);
1184 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1186 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1188 return nfserr_bad_xdr;
1190 setclientid->se_callback_prog = be32_to_cpup(p++);
1191 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1192 READ_BUF(setclientid->se_callback_netid_len);
1193 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1195 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1197 READ_BUF(setclientid->se_callback_addr_len);
1198 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1200 setclientid->se_callback_ident = be32_to_cpup(p++);
1206 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1210 if (argp->minorversion >= 1)
1211 return nfserr_notsupp;
1213 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1214 COPYMEM(&scd_c->sc_clientid, 8);
1215 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1220 /* Also used for NVERIFY */
1222 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1226 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1229 /* For convenience's sake, we compare raw xdr'd attributes in
1230 * nfsd4_proc_verify */
1233 verify->ve_attrlen = be32_to_cpup(p++);
1234 READ_BUF(verify->ve_attrlen);
1235 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1241 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1247 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1251 p = xdr_decode_hyper(p, &write->wr_offset);
1252 write->wr_stable_how = be32_to_cpup(p++);
1253 if (write->wr_stable_how > NFS_FILE_SYNC)
1255 write->wr_buflen = be32_to_cpup(p++);
1257 /* Sorry .. no magic macros for this.. *
1258 * READ_BUF(write->wr_buflen);
1259 * SAVEMEM(write->wr_buf, write->wr_buflen);
1261 avail = (char*)argp->end - (char*)argp->p;
1262 if (avail + argp->pagelen < write->wr_buflen) {
1263 dprintk("NFSD: xdr error (%s:%d)\n",
1264 __FILE__, __LINE__);
1267 write->wr_head.iov_base = p;
1268 write->wr_head.iov_len = avail;
1269 write->wr_pagelist = argp->pagelist;
1271 len = XDR_QUADLEN(write->wr_buflen) << 2;
1277 pages = len >> PAGE_SHIFT;
1278 argp->pagelist += pages;
1279 argp->pagelen -= pages * PAGE_SIZE;
1280 len -= pages * PAGE_SIZE;
1282 next_decode_page(argp);
1284 argp->p += XDR_QUADLEN(len);
1290 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1294 if (argp->minorversion >= 1)
1295 return nfserr_notsupp;
1298 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1299 rlockowner->rl_owner.len = be32_to_cpup(p++);
1300 READ_BUF(rlockowner->rl_owner.len);
1301 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1303 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1304 return nfserr_inval;
1309 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1310 struct nfsd4_exchange_id *exid)
1315 READ_BUF(NFS4_VERIFIER_SIZE);
1316 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1318 status = nfsd4_decode_opaque(argp, &exid->clname);
1320 return nfserr_bad_xdr;
1323 exid->flags = be32_to_cpup(p++);
1325 /* Ignore state_protect4_a */
1327 exid->spa_how = be32_to_cpup(p++);
1328 switch (exid->spa_how) {
1332 /* spo_must_enforce */
1333 status = nfsd4_decode_bitmap(argp,
1334 exid->spo_must_enforce);
1337 /* spo_must_allow */
1338 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1345 dummy = be32_to_cpup(p++);
1346 READ_BUF(dummy * 4);
1350 dummy = be32_to_cpup(p++);
1351 READ_BUF(dummy * 4);
1354 /* ssp_hash_algs<> */
1356 tmp = be32_to_cpup(p++);
1359 dummy = be32_to_cpup(p++);
1361 p += XDR_QUADLEN(dummy);
1364 /* ssp_encr_algs<> */
1366 tmp = be32_to_cpup(p++);
1369 dummy = be32_to_cpup(p++);
1371 p += XDR_QUADLEN(dummy);
1374 /* ssp_window and ssp_num_gss_handles */
1376 dummy = be32_to_cpup(p++);
1377 dummy = be32_to_cpup(p++);
1383 /* Ignore Implementation ID */
1384 READ_BUF(4); /* nfs_impl_id4 array length */
1385 dummy = be32_to_cpup(p++);
1393 dummy = be32_to_cpup(p++);
1395 p += XDR_QUADLEN(dummy);
1399 dummy = be32_to_cpup(p++);
1401 p += XDR_QUADLEN(dummy);
1411 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1412 struct nfsd4_create_session *sess)
1418 COPYMEM(&sess->clientid, 8);
1419 sess->seqid = be32_to_cpup(p++);
1420 sess->flags = be32_to_cpup(p++);
1422 /* Fore channel attrs */
1424 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1425 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1426 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1427 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1428 sess->fore_channel.maxops = be32_to_cpup(p++);
1429 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1430 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1431 if (sess->fore_channel.nr_rdma_attrs == 1) {
1433 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1434 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1435 dprintk("Too many fore channel attr bitmaps!\n");
1439 /* Back channel attrs */
1441 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1442 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1443 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1444 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1445 sess->back_channel.maxops = be32_to_cpup(p++);
1446 sess->back_channel.maxreqs = be32_to_cpup(p++);
1447 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1448 if (sess->back_channel.nr_rdma_attrs == 1) {
1450 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1451 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1452 dprintk("Too many back channel attr bitmaps!\n");
1457 sess->callback_prog = be32_to_cpup(p++);
1458 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1463 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1464 struct nfsd4_destroy_session *destroy_session)
1467 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1468 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1474 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1475 struct nfsd4_free_stateid *free_stateid)
1479 READ_BUF(sizeof(stateid_t));
1480 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1481 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1487 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1488 struct nfsd4_sequence *seq)
1492 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1493 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1494 seq->seqid = be32_to_cpup(p++);
1495 seq->slotid = be32_to_cpup(p++);
1496 seq->maxslots = be32_to_cpup(p++);
1497 seq->cachethis = be32_to_cpup(p++);
1503 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1507 struct nfsd4_test_stateid_id *stateid;
1510 test_stateid->ts_num_ids = ntohl(*p++);
1512 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1514 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1515 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1517 status = nfserrno(-ENOMEM);
1521 INIT_LIST_HEAD(&stateid->ts_id_list);
1522 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1524 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1533 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1534 status = nfserr_bad_xdr;
1538 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1543 COPYMEM(&dc->clientid, 8);
1548 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1553 rc->rca_one_fs = be32_to_cpup(p++);
1558 #ifdef CONFIG_NFSD_PNFS
1560 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1561 struct nfsd4_getdeviceinfo *gdev)
1566 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1567 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1568 gdev->gd_layout_type = be32_to_cpup(p++);
1569 gdev->gd_maxcount = be32_to_cpup(p++);
1570 num = be32_to_cpup(p++);
1573 gdev->gd_notify_types = be32_to_cpup(p++);
1574 for (i = 1; i < num; i++) {
1575 if (be32_to_cpup(p++)) {
1576 status = nfserr_inval;
1585 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1586 struct nfsd4_layoutget *lgp)
1591 lgp->lg_signal = be32_to_cpup(p++);
1592 lgp->lg_layout_type = be32_to_cpup(p++);
1593 lgp->lg_seg.iomode = be32_to_cpup(p++);
1594 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1595 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1596 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1598 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1603 lgp->lg_maxcount = be32_to_cpup(p++);
1609 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1610 struct nfsd4_layoutcommit *lcp)
1616 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1617 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1618 lcp->lc_reclaim = be32_to_cpup(p++);
1620 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1625 lcp->lc_newoffset = be32_to_cpup(p++);
1626 if (lcp->lc_newoffset) {
1628 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1630 lcp->lc_last_wr = 0;
1632 timechange = be32_to_cpup(p++);
1634 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1638 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1641 lcp->lc_layout_type = be32_to_cpup(p++);
1644 * Save the layout update in XDR format and let the layout driver deal
1647 lcp->lc_up_len = be32_to_cpup(p++);
1648 if (lcp->lc_up_len > 0) {
1649 READ_BUF(lcp->lc_up_len);
1650 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1657 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1658 struct nfsd4_layoutreturn *lrp)
1663 lrp->lr_reclaim = be32_to_cpup(p++);
1664 lrp->lr_layout_type = be32_to_cpup(p++);
1665 lrp->lr_seg.iomode = be32_to_cpup(p++);
1666 lrp->lr_return_type = be32_to_cpup(p++);
1667 if (lrp->lr_return_type == RETURN_FILE) {
1669 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1670 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1672 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1677 lrp->lrf_body_len = be32_to_cpup(p++);
1678 if (lrp->lrf_body_len > 0) {
1679 READ_BUF(lrp->lrf_body_len);
1680 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1683 lrp->lr_seg.offset = 0;
1684 lrp->lr_seg.length = NFS4_MAX_UINT64;
1689 #endif /* CONFIG_NFSD_PNFS */
1692 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1693 struct nfsd4_fallocate *fallocate)
1697 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1702 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1703 xdr_decode_hyper(p, &fallocate->falloc_length);
1709 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1713 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1716 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1720 READ_BUF(8 + 8 + 8);
1721 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1722 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1723 p = xdr_decode_hyper(p, &clone->cl_count);
1728 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1733 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
1736 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
1740 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1741 p = xdr_decode_hyper(p, ©->cp_src_pos);
1742 p = xdr_decode_hyper(p, ©->cp_dst_pos);
1743 p = xdr_decode_hyper(p, ©->cp_count);
1744 copy->cp_consecutive = be32_to_cpup(p++);
1745 copy->cp_synchronous = be32_to_cpup(p++);
1746 tmp = be32_to_cpup(p); /* Source server list not supported */
1752 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1756 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1761 p = xdr_decode_hyper(p, &seek->seek_offset);
1762 seek->seek_whence = be32_to_cpup(p);
1768 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1774 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1776 return nfserr_notsupp;
1779 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1781 static nfsd4_dec nfsd4_dec_ops[] = {
1782 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1783 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1784 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1785 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1786 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1787 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1788 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1789 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1790 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1791 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1792 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1793 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1794 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1795 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1796 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1797 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1798 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1799 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1800 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1801 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1802 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1803 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1804 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1805 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1806 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1807 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1808 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1809 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1810 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1811 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1812 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1813 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1814 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1815 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1816 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1817 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1818 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1820 /* new operations for NFSv4.1 */
1821 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1822 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1823 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1824 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1825 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1826 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1827 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1828 #ifdef CONFIG_NFSD_PNFS
1829 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1830 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1831 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1832 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1833 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1835 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1836 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1837 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1838 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1839 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1841 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1842 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1843 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1844 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1845 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1846 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1847 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1849 /* new operations for NFSv4.2 */
1850 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1851 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
1852 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1853 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1854 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1855 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1856 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1857 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1858 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1859 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1860 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1861 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1862 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1866 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1868 if (op->opnum < FIRST_NFS4_OP)
1870 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1872 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1874 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1880 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1883 struct nfsd4_op *op;
1884 bool cachethis = false;
1885 int auth_slack= argp->rqstp->rq_auth_slack;
1886 int max_reply = auth_slack + 8; /* opcnt, status */
1892 argp->taglen = be32_to_cpup(p++);
1893 READ_BUF(argp->taglen);
1894 SAVEMEM(argp->tag, argp->taglen);
1896 argp->minorversion = be32_to_cpup(p++);
1897 argp->opcnt = be32_to_cpup(p++);
1898 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1900 if (argp->taglen > NFSD4_MAX_TAGLEN)
1902 if (argp->opcnt > 100)
1905 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1906 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1908 argp->ops = argp->iops;
1909 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1914 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1917 for (i = 0; i < argp->opcnt; i++) {
1922 op->opnum = be32_to_cpup(p++);
1924 if (nfsd4_opnum_in_range(argp, op))
1925 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1927 op->opnum = OP_ILLEGAL;
1928 op->status = nfserr_op_illegal;
1931 * We'll try to cache the result in the DRC if any one
1932 * op in the compound wants to be cached:
1934 cachethis |= nfsd4_cache_this_op(op);
1936 if (op->opnum == OP_READ) {
1938 readbytes += nfsd4_max_reply(argp->rqstp, op);
1940 max_reply += nfsd4_max_reply(argp->rqstp, op);
1942 * OP_LOCK and OP_LOCKT may return a conflicting lock.
1943 * (Special case because it will just skip encoding this
1944 * if it runs out of xdr buffer space, and it is the only
1945 * operation that behaves this way.)
1947 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
1948 max_reply += NFS4_OPAQUE_LIMIT;
1955 /* Sessions make the DRC unnecessary: */
1956 if (argp->minorversion)
1958 svc_reserve(argp->rqstp, max_reply + readbytes);
1959 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1961 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1962 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1967 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
1968 struct svc_export *exp)
1970 if (exp->ex_flags & NFSEXP_V4ROOT) {
1971 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
1973 } else if (IS_I_VERSION(inode)) {
1974 p = xdr_encode_hyper(p, nfsd4_change_attribute(inode));
1976 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1977 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1982 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1984 *p++ = cpu_to_be32(c->atomic);
1985 if (c->change_supported) {
1986 p = xdr_encode_hyper(p, c->before_change);
1987 p = xdr_encode_hyper(p, c->after_change);
1989 *p++ = cpu_to_be32(c->before_ctime_sec);
1990 *p++ = cpu_to_be32(c->before_ctime_nsec);
1991 *p++ = cpu_to_be32(c->after_ctime_sec);
1992 *p++ = cpu_to_be32(c->after_ctime_nsec);
1997 /* Encode as an array of strings the string given with components
1998 * separated @sep, escaped with esc_enter and esc_exit.
2000 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2001 char *components, char esc_enter,
2007 int strlen, count=0;
2008 char *str, *end, *next;
2010 dprintk("nfsd4_encode_components(%s)\n", components);
2012 pathlen_offset = xdr->buf->len;
2013 p = xdr_reserve_space(xdr, 4);
2015 return nfserr_resource;
2016 p++; /* We will fill this in with @count later */
2018 end = str = components;
2020 bool found_esc = false;
2022 /* try to parse as esc_start, ..., esc_end, sep */
2023 if (*str == esc_enter) {
2024 for (; *end && (*end != esc_exit); end++)
2025 /* find esc_exit or end of string */;
2027 if (*end && (!*next || *next == sep)) {
2034 for (; *end && (*end != sep); end++)
2035 /* find sep or end of string */;
2039 p = xdr_reserve_space(xdr, strlen + 4);
2041 return nfserr_resource;
2042 p = xdr_encode_opaque(p, str, strlen);
2052 pathlen = htonl(count);
2053 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2057 /* Encode as an array of strings the string given with components
2060 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2063 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2067 * encode a location element of a fs_locations structure
2069 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2070 struct nfsd4_fs_location *location)
2074 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2078 status = nfsd4_encode_components(xdr, '/', location->path);
2085 * Encode a path in RFC3530 'pathname4' format
2087 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2088 const struct path *root,
2089 const struct path *path)
2091 struct path cur = *path;
2093 struct dentry **components = NULL;
2094 unsigned int ncomponents = 0;
2095 __be32 err = nfserr_jukebox;
2097 dprintk("nfsd4_encode_components(");
2100 /* First walk the path up to the nfsd root, and store the
2101 * dentries/path components in an array.
2104 if (path_equal(&cur, root))
2106 if (cur.dentry == cur.mnt->mnt_root) {
2107 if (follow_up(&cur))
2111 if ((ncomponents & 15) == 0) {
2112 struct dentry **new;
2113 new = krealloc(components,
2114 sizeof(*new) * (ncomponents + 16),
2120 components[ncomponents++] = cur.dentry;
2121 cur.dentry = dget_parent(cur.dentry);
2123 err = nfserr_resource;
2124 p = xdr_reserve_space(xdr, 4);
2127 *p++ = cpu_to_be32(ncomponents);
2129 while (ncomponents) {
2130 struct dentry *dentry = components[ncomponents - 1];
2133 spin_lock(&dentry->d_lock);
2134 len = dentry->d_name.len;
2135 p = xdr_reserve_space(xdr, len + 4);
2137 spin_unlock(&dentry->d_lock);
2140 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2141 dprintk("/%pd", dentry);
2142 spin_unlock(&dentry->d_lock);
2151 dput(components[--ncomponents]);
2157 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2158 struct svc_rqst *rqstp, const struct path *path)
2160 struct svc_export *exp_ps;
2163 exp_ps = rqst_find_fsidzero_export(rqstp);
2165 return nfserrno(PTR_ERR(exp_ps));
2166 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2172 * encode a fs_locations structure
2174 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2175 struct svc_rqst *rqstp, struct svc_export *exp)
2180 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2182 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2185 p = xdr_reserve_space(xdr, 4);
2187 return nfserr_resource;
2188 *p++ = cpu_to_be32(fslocs->locations_count);
2189 for (i=0; i<fslocs->locations_count; i++) {
2190 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2197 static u32 nfs4_file_type(umode_t mode)
2199 switch (mode & S_IFMT) {
2200 case S_IFIFO: return NF4FIFO;
2201 case S_IFCHR: return NF4CHR;
2202 case S_IFDIR: return NF4DIR;
2203 case S_IFBLK: return NF4BLK;
2204 case S_IFLNK: return NF4LNK;
2205 case S_IFREG: return NF4REG;
2206 case S_IFSOCK: return NF4SOCK;
2207 default: return NF4BAD;
2211 static inline __be32
2212 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2213 struct nfs4_ace *ace)
2215 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2216 return nfs4_acl_write_who(xdr, ace->whotype);
2217 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2218 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2220 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2223 static inline __be32
2224 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2227 unsigned long i = hweight_long(layout_types);
2229 p = xdr_reserve_space(xdr, 4 + 4 * i);
2231 return nfserr_resource;
2233 *p++ = cpu_to_be32(i);
2235 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2236 if (layout_types & (1 << i))
2237 *p++ = cpu_to_be32(i);
2242 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2243 FATTR4_WORD0_RDATTR_ERROR)
2244 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2245 #define WORD2_ABSENT_FS_ATTRS 0
2247 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2248 static inline __be32
2249 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2250 void *context, int len)
2254 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2256 return nfserr_resource;
2259 * For now we use a 0 here to indicate the null translation; in
2260 * the future we may place a call to translation code here.
2262 *p++ = cpu_to_be32(0); /* lfs */
2263 *p++ = cpu_to_be32(0); /* pi */
2264 p = xdr_encode_opaque(p, context, len);
2268 static inline __be32
2269 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2270 void *context, int len)
2274 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2276 /* As per referral draft: */
2277 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2278 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2279 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2280 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2281 *rdattr_err = NFSERR_MOVED;
2283 return nfserr_moved;
2285 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2286 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2287 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2292 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2294 struct path path = exp->ex_path;
2298 while (follow_up(&path)) {
2299 if (path.dentry != path.mnt->mnt_root)
2302 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2308 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2313 p = xdr_reserve_space(xdr, 16);
2316 *p++ = cpu_to_be32(3);
2317 *p++ = cpu_to_be32(bmval0);
2318 *p++ = cpu_to_be32(bmval1);
2319 *p++ = cpu_to_be32(bmval2);
2320 } else if (bmval1) {
2321 p = xdr_reserve_space(xdr, 12);
2324 *p++ = cpu_to_be32(2);
2325 *p++ = cpu_to_be32(bmval0);
2326 *p++ = cpu_to_be32(bmval1);
2328 p = xdr_reserve_space(xdr, 8);
2331 *p++ = cpu_to_be32(1);
2332 *p++ = cpu_to_be32(bmval0);
2337 return nfserr_resource;
2341 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2345 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2346 struct svc_export *exp,
2347 struct dentry *dentry, u32 *bmval,
2348 struct svc_rqst *rqstp, int ignore_crossmnt)
2350 u32 bmval0 = bmval[0];
2351 u32 bmval1 = bmval[1];
2352 u32 bmval2 = bmval[2];
2354 struct svc_fh *tempfh = NULL;
2355 struct kstatfs statfs;
2357 int starting_len = xdr->buf->len;
2365 struct nfs4_acl *acl = NULL;
2366 void *context = NULL;
2368 bool contextsupport = false;
2369 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2370 u32 minorversion = resp->cstate.minorversion;
2371 struct path path = {
2372 .mnt = exp->ex_path.mnt,
2375 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2377 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2378 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2380 if (exp->ex_fslocs.migrated) {
2381 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2386 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2389 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2390 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2391 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2392 FATTR4_WORD1_SPACE_TOTAL))) {
2393 err = vfs_statfs(&path, &statfs);
2397 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2398 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2399 status = nfserr_jukebox;
2402 fh_init(tempfh, NFS4_FHSIZE);
2403 status = fh_compose(tempfh, exp, dentry, NULL);
2408 if (bmval0 & FATTR4_WORD0_ACL) {
2409 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2410 if (err == -EOPNOTSUPP)
2411 bmval0 &= ~FATTR4_WORD0_ACL;
2412 else if (err == -EINVAL) {
2413 status = nfserr_attrnotsupp;
2415 } else if (err != 0)
2419 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2420 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2421 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2422 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2423 err = security_inode_getsecctx(d_inode(dentry),
2424 &context, &contextlen);
2427 contextsupport = (err == 0);
2428 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2429 if (err == -EOPNOTSUPP)
2430 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2435 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2437 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2441 attrlen_offset = xdr->buf->len;
2442 p = xdr_reserve_space(xdr, 4);
2445 p++; /* to be backfilled later */
2447 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2450 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2452 if (!IS_POSIXACL(dentry->d_inode))
2453 supp[0] &= ~FATTR4_WORD0_ACL;
2454 if (!contextsupport)
2455 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2457 p = xdr_reserve_space(xdr, 12);
2460 *p++ = cpu_to_be32(2);
2461 *p++ = cpu_to_be32(supp[0]);
2462 *p++ = cpu_to_be32(supp[1]);
2464 p = xdr_reserve_space(xdr, 16);
2467 *p++ = cpu_to_be32(3);
2468 *p++ = cpu_to_be32(supp[0]);
2469 *p++ = cpu_to_be32(supp[1]);
2470 *p++ = cpu_to_be32(supp[2]);
2473 if (bmval0 & FATTR4_WORD0_TYPE) {
2474 p = xdr_reserve_space(xdr, 4);
2477 dummy = nfs4_file_type(stat.mode);
2478 if (dummy == NF4BAD) {
2479 status = nfserr_serverfault;
2482 *p++ = cpu_to_be32(dummy);
2484 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2485 p = xdr_reserve_space(xdr, 4);
2488 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2489 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2491 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2492 NFS4_FH_VOL_RENAME);
2494 if (bmval0 & FATTR4_WORD0_CHANGE) {
2495 p = xdr_reserve_space(xdr, 8);
2498 p = encode_change(p, &stat, d_inode(dentry), exp);
2500 if (bmval0 & FATTR4_WORD0_SIZE) {
2501 p = xdr_reserve_space(xdr, 8);
2504 p = xdr_encode_hyper(p, stat.size);
2506 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2507 p = xdr_reserve_space(xdr, 4);
2510 *p++ = cpu_to_be32(1);
2512 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2513 p = xdr_reserve_space(xdr, 4);
2516 *p++ = cpu_to_be32(1);
2518 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2519 p = xdr_reserve_space(xdr, 4);
2522 *p++ = cpu_to_be32(0);
2524 if (bmval0 & FATTR4_WORD0_FSID) {
2525 p = xdr_reserve_space(xdr, 16);
2528 if (exp->ex_fslocs.migrated) {
2529 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2530 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2531 } else switch(fsid_source(fhp)) {
2532 case FSIDSOURCE_FSID:
2533 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2534 p = xdr_encode_hyper(p, (u64)0);
2536 case FSIDSOURCE_DEV:
2537 *p++ = cpu_to_be32(0);
2538 *p++ = cpu_to_be32(MAJOR(stat.dev));
2539 *p++ = cpu_to_be32(0);
2540 *p++ = cpu_to_be32(MINOR(stat.dev));
2542 case FSIDSOURCE_UUID:
2543 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2548 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2549 p = xdr_reserve_space(xdr, 4);
2552 *p++ = cpu_to_be32(0);
2554 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2555 p = xdr_reserve_space(xdr, 4);
2558 *p++ = cpu_to_be32(nn->nfsd4_lease);
2560 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2561 p = xdr_reserve_space(xdr, 4);
2564 *p++ = cpu_to_be32(rdattr_err);
2566 if (bmval0 & FATTR4_WORD0_ACL) {
2567 struct nfs4_ace *ace;
2570 p = xdr_reserve_space(xdr, 4);
2574 *p++ = cpu_to_be32(0);
2577 p = xdr_reserve_space(xdr, 4);
2580 *p++ = cpu_to_be32(acl->naces);
2582 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2583 p = xdr_reserve_space(xdr, 4*3);
2586 *p++ = cpu_to_be32(ace->type);
2587 *p++ = cpu_to_be32(ace->flag);
2588 *p++ = cpu_to_be32(ace->access_mask &
2590 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2596 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2597 p = xdr_reserve_space(xdr, 4);
2600 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2601 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2603 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2604 p = xdr_reserve_space(xdr, 4);
2607 *p++ = cpu_to_be32(1);
2609 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2610 p = xdr_reserve_space(xdr, 4);
2613 *p++ = cpu_to_be32(0);
2615 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2616 p = xdr_reserve_space(xdr, 4);
2619 *p++ = cpu_to_be32(1);
2621 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2622 p = xdr_reserve_space(xdr, 4);
2625 *p++ = cpu_to_be32(1);
2627 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2628 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2631 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2632 fhp->fh_handle.fh_size);
2634 if (bmval0 & FATTR4_WORD0_FILEID) {
2635 p = xdr_reserve_space(xdr, 8);
2638 p = xdr_encode_hyper(p, stat.ino);
2640 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2641 p = xdr_reserve_space(xdr, 8);
2644 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2646 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2647 p = xdr_reserve_space(xdr, 8);
2650 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2652 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2653 p = xdr_reserve_space(xdr, 8);
2656 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2658 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2659 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2663 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2664 p = xdr_reserve_space(xdr, 4);
2667 *p++ = cpu_to_be32(1);
2669 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2670 p = xdr_reserve_space(xdr, 8);
2673 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2675 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2676 p = xdr_reserve_space(xdr, 4);
2679 *p++ = cpu_to_be32(255);
2681 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2682 p = xdr_reserve_space(xdr, 4);
2685 *p++ = cpu_to_be32(statfs.f_namelen);
2687 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2688 p = xdr_reserve_space(xdr, 8);
2691 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2693 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2694 p = xdr_reserve_space(xdr, 8);
2697 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2699 if (bmval1 & FATTR4_WORD1_MODE) {
2700 p = xdr_reserve_space(xdr, 4);
2703 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2705 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2706 p = xdr_reserve_space(xdr, 4);
2709 *p++ = cpu_to_be32(1);
2711 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2712 p = xdr_reserve_space(xdr, 4);
2715 *p++ = cpu_to_be32(stat.nlink);
2717 if (bmval1 & FATTR4_WORD1_OWNER) {
2718 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2722 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2723 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2727 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2728 p = xdr_reserve_space(xdr, 8);
2731 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2732 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2734 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2735 p = xdr_reserve_space(xdr, 8);
2738 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2739 p = xdr_encode_hyper(p, dummy64);
2741 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2742 p = xdr_reserve_space(xdr, 8);
2745 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2746 p = xdr_encode_hyper(p, dummy64);
2748 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2749 p = xdr_reserve_space(xdr, 8);
2752 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2753 p = xdr_encode_hyper(p, dummy64);
2755 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2756 p = xdr_reserve_space(xdr, 8);
2759 dummy64 = (u64)stat.blocks << 9;
2760 p = xdr_encode_hyper(p, dummy64);
2762 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2763 p = xdr_reserve_space(xdr, 12);
2766 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2767 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2769 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2770 p = xdr_reserve_space(xdr, 12);
2773 *p++ = cpu_to_be32(0);
2774 *p++ = cpu_to_be32(1);
2775 *p++ = cpu_to_be32(0);
2777 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2778 p = xdr_reserve_space(xdr, 12);
2781 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2782 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2784 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2785 p = xdr_reserve_space(xdr, 12);
2788 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2789 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2791 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2792 struct kstat parent_stat;
2795 p = xdr_reserve_space(xdr, 8);
2799 * Get parent's attributes if not ignoring crossmount
2800 * and this is the root of a cross-mounted filesystem.
2802 if (ignore_crossmnt == 0 &&
2803 dentry == exp->ex_path.mnt->mnt_root) {
2804 err = get_parent_attributes(exp, &parent_stat);
2807 ino = parent_stat.ino;
2809 p = xdr_encode_hyper(p, ino);
2811 #ifdef CONFIG_NFSD_PNFS
2812 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2813 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2818 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2819 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2824 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2825 p = xdr_reserve_space(xdr, 4);
2828 *p++ = cpu_to_be32(stat.blksize);
2830 #endif /* CONFIG_NFSD_PNFS */
2831 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2834 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2835 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
2836 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
2837 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
2839 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
2844 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2845 status = nfsd4_encode_security_label(xdr, rqstp, context,
2851 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2852 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2856 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2858 security_release_secctx(context, contextlen);
2859 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2866 xdr_truncate_encode(xdr, starting_len);
2869 status = nfserrno(err);
2872 status = nfserr_resource;
2876 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2877 struct xdr_buf *buf, __be32 *p, int bytes)
2879 xdr->scratch.iov_len = 0;
2880 memset(buf, 0, sizeof(struct xdr_buf));
2881 buf->head[0].iov_base = p;
2882 buf->head[0].iov_len = 0;
2885 xdr->iov = buf->head;
2887 xdr->end = (void *)p + bytes;
2888 buf->buflen = bytes;
2891 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2892 struct svc_fh *fhp, struct svc_export *exp,
2893 struct dentry *dentry, u32 *bmval,
2894 struct svc_rqst *rqstp, int ignore_crossmnt)
2896 struct xdr_buf dummy;
2897 struct xdr_stream xdr;
2900 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2901 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2907 static inline int attributes_need_mount(u32 *bmval)
2909 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2911 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2917 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2918 const char *name, int namlen)
2920 struct svc_export *exp = cd->rd_fhp->fh_export;
2921 struct dentry *dentry;
2923 int ignore_crossmnt = 0;
2925 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2927 return nfserrno(PTR_ERR(dentry));
2928 if (d_really_is_negative(dentry)) {
2930 * we're not holding the i_mutex here, so there's
2931 * a window where this directory entry could have gone
2935 return nfserr_noent;
2940 * In the case of a mountpoint, the client may be asking for
2941 * attributes that are only properties of the underlying filesystem
2942 * as opposed to the cross-mounted file system. In such a case,
2943 * we will not follow the cross mount and will fill the attribtutes
2944 * directly from the mountpoint dentry.
2946 if (nfsd_mountpoint(dentry, exp)) {
2949 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2950 && !attributes_need_mount(cd->rd_bmval)) {
2951 ignore_crossmnt = 1;
2955 * Why the heck aren't we just using nfsd_lookup??
2956 * Different "."/".." handling? Something else?
2957 * At least, add a comment here to explain....
2959 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2961 nfserr = nfserrno(err);
2964 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2970 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2971 cd->rd_rqstp, ignore_crossmnt);
2979 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2983 p = xdr_reserve_space(xdr, 20);
2987 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2988 *p++ = htonl(0); /* bmval1 */
2990 *p++ = htonl(4); /* attribute length */
2991 *p++ = nfserr; /* no htonl */
2996 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2997 loff_t offset, u64 ino, unsigned int d_type)
2999 struct readdir_cd *ccd = ccdv;
3000 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3001 struct xdr_stream *xdr = cd->xdr;
3002 int start_offset = xdr->buf->len;
3004 u32 name_and_cookie;
3006 __be32 nfserr = nfserr_toosmall;
3010 /* In nfsv4, "." and ".." never make it onto the wire.. */
3011 if (name && isdotent(name, namlen)) {
3012 cd->common.err = nfs_ok;
3016 if (cd->cookie_offset) {
3017 wire_offset = cpu_to_be64(offset);
3018 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3022 p = xdr_reserve_space(xdr, 4);
3025 *p++ = xdr_one; /* mark entry present */
3026 cookie_offset = xdr->buf->len;
3027 p = xdr_reserve_space(xdr, 3*4 + namlen);
3030 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3031 p = xdr_encode_array(p, name, namlen); /* name length & name */
3033 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3037 case nfserr_resource:
3038 nfserr = nfserr_toosmall;
3041 xdr_truncate_encode(xdr, start_offset);
3045 * If the client requested the RDATTR_ERROR attribute,
3046 * we stuff the error code into this attribute
3047 * and continue. If this attribute was not requested,
3048 * then in accordance with the spec, we fail the
3049 * entire READDIR operation(!)
3051 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3053 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3055 nfserr = nfserr_toosmall;
3059 nfserr = nfserr_toosmall;
3060 entry_bytes = xdr->buf->len - start_offset;
3061 if (entry_bytes > cd->rd_maxcount)
3063 cd->rd_maxcount -= entry_bytes;
3065 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3066 * let's always let through the first entry, at least:
3068 if (!cd->rd_dircount)
3070 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3071 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3073 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3075 cd->cookie_offset = cookie_offset;
3077 cd->common.err = nfs_ok;
3080 xdr_truncate_encode(xdr, start_offset);
3081 cd->common.err = nfserr;
3086 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3090 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3092 return nfserr_resource;
3093 *p++ = cpu_to_be32(sid->si_generation);
3094 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3095 sizeof(stateid_opaque_t));
3100 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3102 struct xdr_stream *xdr = &resp->xdr;
3106 p = xdr_reserve_space(xdr, 8);
3108 return nfserr_resource;
3109 *p++ = cpu_to_be32(access->ac_supported);
3110 *p++ = cpu_to_be32(access->ac_resp_access);
3115 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3117 struct xdr_stream *xdr = &resp->xdr;
3121 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3123 return nfserr_resource;
3124 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3125 NFS4_MAX_SESSIONID_LEN);
3126 *p++ = cpu_to_be32(bcts->dir);
3127 /* Upshifting from TCP to RDMA is not supported */
3128 *p++ = cpu_to_be32(0);
3134 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3136 struct xdr_stream *xdr = &resp->xdr;
3139 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3146 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3148 struct xdr_stream *xdr = &resp->xdr;
3152 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3154 return nfserr_resource;
3155 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3156 NFS4_VERIFIER_SIZE);
3162 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3164 struct xdr_stream *xdr = &resp->xdr;
3168 p = xdr_reserve_space(xdr, 20);
3170 return nfserr_resource;
3171 encode_cinfo(p, &create->cr_cinfo);
3172 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3173 create->cr_bmval[1], create->cr_bmval[2]);
3179 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3181 struct svc_fh *fhp = getattr->ga_fhp;
3182 struct xdr_stream *xdr = &resp->xdr;
3187 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3194 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3196 struct xdr_stream *xdr = &resp->xdr;
3197 struct svc_fh *fhp = *fhpp;
3202 len = fhp->fh_handle.fh_size;
3203 p = xdr_reserve_space(xdr, len + 4);
3205 return nfserr_resource;
3206 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3212 * Including all fields other than the name, a LOCK4denied structure requires
3213 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3216 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3218 struct xdr_netobj *conf = &ld->ld_owner;
3222 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3225 * Don't fail to return the result just because we can't
3226 * return the conflicting open:
3234 return nfserr_resource;
3236 p = xdr_encode_hyper(p, ld->ld_start);
3237 p = xdr_encode_hyper(p, ld->ld_length);
3238 *p++ = cpu_to_be32(ld->ld_type);
3240 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3241 p = xdr_encode_opaque(p, conf->data, conf->len);
3243 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3244 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3245 *p++ = cpu_to_be32(0); /* length of owner name */
3247 return nfserr_denied;
3251 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3253 struct xdr_stream *xdr = &resp->xdr;
3256 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3257 else if (nfserr == nfserr_denied)
3258 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3264 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3266 struct xdr_stream *xdr = &resp->xdr;
3268 if (nfserr == nfserr_denied)
3269 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3274 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3276 struct xdr_stream *xdr = &resp->xdr;
3279 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3286 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3288 struct xdr_stream *xdr = &resp->xdr;
3292 p = xdr_reserve_space(xdr, 20);
3294 return nfserr_resource;
3295 p = encode_cinfo(p, &link->li_cinfo);
3302 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3304 struct xdr_stream *xdr = &resp->xdr;
3310 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3313 p = xdr_reserve_space(xdr, 24);
3315 return nfserr_resource;
3316 p = encode_cinfo(p, &open->op_cinfo);
3317 *p++ = cpu_to_be32(open->op_rflags);
3319 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3324 p = xdr_reserve_space(xdr, 4);
3326 return nfserr_resource;
3328 *p++ = cpu_to_be32(open->op_delegate_type);
3329 switch (open->op_delegate_type) {
3330 case NFS4_OPEN_DELEGATE_NONE:
3332 case NFS4_OPEN_DELEGATE_READ:
3333 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3336 p = xdr_reserve_space(xdr, 20);
3338 return nfserr_resource;
3339 *p++ = cpu_to_be32(open->op_recall);
3342 * TODO: ACE's in delegations
3344 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3345 *p++ = cpu_to_be32(0);
3346 *p++ = cpu_to_be32(0);
3347 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3349 case NFS4_OPEN_DELEGATE_WRITE:
3350 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3353 p = xdr_reserve_space(xdr, 32);
3355 return nfserr_resource;
3356 *p++ = cpu_to_be32(0);
3359 * TODO: space_limit's in delegations
3361 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3362 *p++ = cpu_to_be32(~(u32)0);
3363 *p++ = cpu_to_be32(~(u32)0);
3366 * TODO: ACE's in delegations
3368 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3369 *p++ = cpu_to_be32(0);
3370 *p++ = cpu_to_be32(0);
3371 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3373 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3374 switch (open->op_why_no_deleg) {
3375 case WND4_CONTENTION:
3377 p = xdr_reserve_space(xdr, 8);
3379 return nfserr_resource;
3380 *p++ = cpu_to_be32(open->op_why_no_deleg);
3381 /* deleg signaling not supported yet: */
3382 *p++ = cpu_to_be32(0);
3385 p = xdr_reserve_space(xdr, 4);
3387 return nfserr_resource;
3388 *p++ = cpu_to_be32(open->op_why_no_deleg);
3394 /* XXX save filehandle here */
3400 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3402 struct xdr_stream *xdr = &resp->xdr;
3405 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3411 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3413 struct xdr_stream *xdr = &resp->xdr;
3416 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3421 static __be32 nfsd4_encode_splice_read(
3422 struct nfsd4_compoundres *resp,
3423 struct nfsd4_read *read,
3424 struct file *file, unsigned long maxcount)
3426 struct xdr_stream *xdr = &resp->xdr;
3427 struct xdr_buf *buf = xdr->buf;
3432 __be32 *p = xdr->p - 2;
3434 /* Make sure there will be room for padding if needed */
3435 if (xdr->end - xdr->p < 1)
3436 return nfserr_resource;
3439 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3440 read->rd_offset, &maxcount);
3443 * nfsd_splice_actor may have already messed with the
3444 * page length; reset it so as not to confuse
3445 * xdr_truncate_encode:
3451 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3452 d_inode(read->rd_fhp->fh_dentry)->i_size);
3454 *(p++) = htonl(eof);
3455 *(p++) = htonl(maxcount);
3457 buf->page_len = maxcount;
3458 buf->len += maxcount;
3459 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3462 /* Use rest of head for padding and remaining ops: */
3463 buf->tail[0].iov_base = xdr->p;
3464 buf->tail[0].iov_len = 0;
3465 xdr->iov = buf->tail;
3467 int pad = 4 - (maxcount&3);
3471 buf->tail[0].iov_base += maxcount&3;
3472 buf->tail[0].iov_len = pad;
3476 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3477 buf->buflen - buf->len);
3478 buf->buflen = buf->len + space_left;
3479 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3484 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3485 struct nfsd4_read *read,
3486 struct file *file, unsigned long maxcount)
3488 struct xdr_stream *xdr = &resp->xdr;
3491 int starting_len = xdr->buf->len - 8;
3503 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3504 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3506 resp->rqstp->rq_vec[v].iov_base = p;
3507 resp->rqstp->rq_vec[v].iov_len = thislen;
3512 thislen = min_t(long, len, PAGE_SIZE);
3513 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3515 resp->rqstp->rq_vec[v].iov_base = p;
3516 resp->rqstp->rq_vec[v].iov_len = thislen;
3523 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3524 read->rd_vlen, &maxcount);
3527 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3529 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3530 d_inode(read->rd_fhp->fh_dentry)->i_size);
3533 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3534 tmp = htonl(maxcount);
3535 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3537 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3538 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3545 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3546 struct nfsd4_read *read)
3548 unsigned long maxcount;
3549 struct xdr_stream *xdr = &resp->xdr;
3550 struct file *file = read->rd_filp;
3551 int starting_len = xdr->buf->len;
3552 struct raparms *ra = NULL;
3558 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3560 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3561 nfserr = nfserr_resource;
3564 if (resp->xdr.buf->page_len &&
3565 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3567 nfserr = nfserr_resource;
3570 xdr_commit_encode(xdr);
3572 maxcount = svc_max_payload(resp->rqstp);
3573 maxcount = min_t(unsigned long, maxcount,
3574 (xdr->buf->buflen - xdr->buf->len));
3575 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3577 if (read->rd_tmp_file)
3578 ra = nfsd_init_raparms(file);
3580 if (file->f_op->splice_read &&
3581 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3582 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3584 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3587 nfsd_put_raparams(file, ra);
3590 xdr_truncate_encode(xdr, starting_len);
3599 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3604 struct xdr_stream *xdr = &resp->xdr;
3605 int length_offset = xdr->buf->len;
3611 p = xdr_reserve_space(xdr, 4);
3613 return nfserr_resource;
3614 maxcount = PAGE_SIZE;
3616 p = xdr_reserve_space(xdr, maxcount);
3618 return nfserr_resource;
3620 * XXX: By default, vfs_readlink() will truncate symlinks if they
3621 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3622 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3623 * that truncation occurred, and return NFS4ERR_RESOURCE.
3625 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3626 (char *)p, &maxcount);
3627 if (nfserr == nfserr_isdir)
3628 nfserr = nfserr_inval;
3630 xdr_truncate_encode(xdr, length_offset);
3634 wire_count = htonl(maxcount);
3635 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3636 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3638 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3639 &zero, 4 - (maxcount&3));
3644 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3650 struct xdr_stream *xdr = &resp->xdr;
3651 int starting_len = xdr->buf->len;
3657 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3659 return nfserr_resource;
3661 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3662 *p++ = cpu_to_be32(0);
3663 *p++ = cpu_to_be32(0);
3664 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3665 - (char *)resp->xdr.buf->head[0].iov_base;
3668 * Number of bytes left for directory entries allowing for the
3669 * final 8 bytes of the readdir and a following failed op:
3671 bytes_left = xdr->buf->buflen - xdr->buf->len
3672 - COMPOUND_ERR_SLACK_SPACE - 8;
3673 if (bytes_left < 0) {
3674 nfserr = nfserr_resource;
3677 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3679 * Note the rfc defines rd_maxcount as the size of the
3680 * READDIR4resok structure, which includes the verifier above
3681 * and the 8 bytes encoded at the end of this function:
3683 if (maxcount < 16) {
3684 nfserr = nfserr_toosmall;
3687 maxcount = min_t(int, maxcount-16, bytes_left);
3689 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3690 if (!readdir->rd_dircount)
3691 readdir->rd_dircount = INT_MAX;
3694 readdir->rd_maxcount = maxcount;
3695 readdir->common.err = 0;
3696 readdir->cookie_offset = 0;
3698 offset = readdir->rd_cookie;
3699 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3701 &readdir->common, nfsd4_encode_dirent);
3702 if (nfserr == nfs_ok &&
3703 readdir->common.err == nfserr_toosmall &&
3704 xdr->buf->len == starting_len + 8) {
3705 /* nothing encoded; which limit did we hit?: */
3706 if (maxcount - 16 < bytes_left)
3707 /* It was the fault of rd_maxcount: */
3708 nfserr = nfserr_toosmall;
3710 /* We ran out of buffer space: */
3711 nfserr = nfserr_resource;
3716 if (readdir->cookie_offset) {
3717 wire_offset = cpu_to_be64(offset);
3718 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3722 p = xdr_reserve_space(xdr, 8);
3727 *p++ = 0; /* no more entries */
3728 *p++ = htonl(readdir->common.err == nfserr_eof);
3732 xdr_truncate_encode(xdr, starting_len);
3737 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3739 struct xdr_stream *xdr = &resp->xdr;
3743 p = xdr_reserve_space(xdr, 20);
3745 return nfserr_resource;
3746 p = encode_cinfo(p, &remove->rm_cinfo);
3752 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3754 struct xdr_stream *xdr = &resp->xdr;
3758 p = xdr_reserve_space(xdr, 40);
3760 return nfserr_resource;
3761 p = encode_cinfo(p, &rename->rn_sinfo);
3762 p = encode_cinfo(p, &rename->rn_tinfo);
3768 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3769 __be32 nfserr, struct svc_export *exp)
3771 u32 i, nflavs, supported;
3772 struct exp_flavor_info *flavs;
3773 struct exp_flavor_info def_flavs[2];
3774 __be32 *p, *flavorsp;
3775 static bool report = true;
3779 nfserr = nfserr_resource;
3780 if (exp->ex_nflavors) {
3781 flavs = exp->ex_flavors;
3782 nflavs = exp->ex_nflavors;
3783 } else { /* Handling of some defaults in absence of real secinfo: */
3785 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3787 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3788 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3789 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3791 flavs[0].pseudoflavor
3792 = svcauth_gss_flavor(exp->ex_client);
3795 flavs[0].pseudoflavor
3796 = exp->ex_client->flavour->flavour;
3801 p = xdr_reserve_space(xdr, 4);
3804 flavorsp = p++; /* to be backfilled later */
3806 for (i = 0; i < nflavs; i++) {
3807 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3808 struct rpcsec_gss_info info;
3810 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3812 p = xdr_reserve_space(xdr, 4 + 4 +
3813 XDR_LEN(info.oid.len) + 4 + 4);
3816 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3817 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3818 *p++ = cpu_to_be32(info.qop);
3819 *p++ = cpu_to_be32(info.service);
3820 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3822 p = xdr_reserve_space(xdr, 4);
3825 *p++ = cpu_to_be32(pf);
3828 pr_warn("NFS: SECINFO: security flavor %u "
3829 "is not supported\n", pf);
3833 if (nflavs != supported)
3835 *flavorsp = htonl(supported);
3844 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3845 struct nfsd4_secinfo *secinfo)
3847 struct xdr_stream *xdr = &resp->xdr;
3849 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3853 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3854 struct nfsd4_secinfo_no_name *secinfo)
3856 struct xdr_stream *xdr = &resp->xdr;
3858 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3862 * The SETATTR encode routine is special -- it always encodes a bitmap,
3863 * regardless of the error status.
3866 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3868 struct xdr_stream *xdr = &resp->xdr;
3871 p = xdr_reserve_space(xdr, 16);
3873 return nfserr_resource;
3875 *p++ = cpu_to_be32(3);
3876 *p++ = cpu_to_be32(0);
3877 *p++ = cpu_to_be32(0);
3878 *p++ = cpu_to_be32(0);
3881 *p++ = cpu_to_be32(3);
3882 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3883 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3884 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3890 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3892 struct xdr_stream *xdr = &resp->xdr;
3896 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3898 return nfserr_resource;
3899 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3900 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3901 NFS4_VERIFIER_SIZE);
3903 else if (nfserr == nfserr_clid_inuse) {
3904 p = xdr_reserve_space(xdr, 8);
3906 return nfserr_resource;
3907 *p++ = cpu_to_be32(0);
3908 *p++ = cpu_to_be32(0);
3914 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3916 struct xdr_stream *xdr = &resp->xdr;
3920 p = xdr_reserve_space(xdr, 16);
3922 return nfserr_resource;
3923 *p++ = cpu_to_be32(write->wr_bytes_written);
3924 *p++ = cpu_to_be32(write->wr_how_written);
3925 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3926 NFS4_VERIFIER_SIZE);
3932 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3933 struct nfsd4_exchange_id *exid)
3935 struct xdr_stream *xdr = &resp->xdr;
3940 int server_scope_sz;
3942 uint64_t minor_id = 0;
3947 major_id = utsname()->nodename;
3948 major_id_sz = strlen(major_id);
3949 server_scope = utsname()->nodename;
3950 server_scope_sz = strlen(server_scope);
3952 p = xdr_reserve_space(xdr,
3953 8 /* eir_clientid */ +
3954 4 /* eir_sequenceid */ +
3958 return nfserr_resource;
3960 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3961 *p++ = cpu_to_be32(exid->seqid);
3962 *p++ = cpu_to_be32(exid->flags);
3964 *p++ = cpu_to_be32(exid->spa_how);
3966 switch (exid->spa_how) {
3970 /* spo_must_enforce bitmap: */
3971 status = nfsd4_encode_bitmap(xdr,
3972 exid->spo_must_enforce[0],
3973 exid->spo_must_enforce[1],
3974 exid->spo_must_enforce[2]);
3977 /* spo_must_allow bitmap: */
3978 status = nfsd4_encode_bitmap(xdr,
3979 exid->spo_must_allow[0],
3980 exid->spo_must_allow[1],
3981 exid->spo_must_allow[2]);
3989 p = xdr_reserve_space(xdr,
3990 8 /* so_minor_id */ +
3991 4 /* so_major_id.len */ +
3992 (XDR_QUADLEN(major_id_sz) * 4) +
3993 4 /* eir_server_scope.len */ +
3994 (XDR_QUADLEN(server_scope_sz) * 4) +
3995 4 /* eir_server_impl_id.count (0) */);
3997 return nfserr_resource;
3999 /* The server_owner struct */
4000 p = xdr_encode_hyper(p, minor_id); /* Minor id */
4002 p = xdr_encode_opaque(p, major_id, major_id_sz);
4005 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
4007 /* Implementation id */
4008 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
4015 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4016 struct nfsd4_create_session *sess)
4018 struct xdr_stream *xdr = &resp->xdr;
4024 p = xdr_reserve_space(xdr, 24);
4026 return nfserr_resource;
4027 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4028 NFS4_MAX_SESSIONID_LEN);
4029 *p++ = cpu_to_be32(sess->seqid);
4030 *p++ = cpu_to_be32(sess->flags);
4032 p = xdr_reserve_space(xdr, 28);
4034 return nfserr_resource;
4035 *p++ = cpu_to_be32(0); /* headerpadsz */
4036 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4037 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4038 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4039 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4040 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4041 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4043 if (sess->fore_channel.nr_rdma_attrs) {
4044 p = xdr_reserve_space(xdr, 4);
4046 return nfserr_resource;
4047 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4050 p = xdr_reserve_space(xdr, 28);
4052 return nfserr_resource;
4053 *p++ = cpu_to_be32(0); /* headerpadsz */
4054 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4055 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4056 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4057 *p++ = cpu_to_be32(sess->back_channel.maxops);
4058 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4059 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4061 if (sess->back_channel.nr_rdma_attrs) {
4062 p = xdr_reserve_space(xdr, 4);
4064 return nfserr_resource;
4065 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4071 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4072 struct nfsd4_sequence *seq)
4074 struct xdr_stream *xdr = &resp->xdr;
4080 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4082 return nfserr_resource;
4083 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4084 NFS4_MAX_SESSIONID_LEN);
4085 *p++ = cpu_to_be32(seq->seqid);
4086 *p++ = cpu_to_be32(seq->slotid);
4087 /* Note slotid's are numbered from zero: */
4088 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4089 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4090 *p++ = cpu_to_be32(seq->status_flags);
4092 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4097 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4098 struct nfsd4_test_stateid *test_stateid)
4100 struct xdr_stream *xdr = &resp->xdr;
4101 struct nfsd4_test_stateid_id *stateid, *next;
4107 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4109 return nfserr_resource;
4110 *p++ = htonl(test_stateid->ts_num_ids);
4112 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4113 *p++ = stateid->ts_id_status;
4119 #ifdef CONFIG_NFSD_PNFS
4121 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4122 struct nfsd4_getdeviceinfo *gdev)
4124 struct xdr_stream *xdr = &resp->xdr;
4125 const struct nfsd4_layout_ops *ops;
4126 u32 starting_len = xdr->buf->len, needed_len;
4129 dprintk("%s: err %d\n", __func__, be32_to_cpu(nfserr));
4133 nfserr = nfserr_resource;
4134 p = xdr_reserve_space(xdr, 4);
4138 *p++ = cpu_to_be32(gdev->gd_layout_type);
4140 /* If maxcount is 0 then just update notifications */
4141 if (gdev->gd_maxcount != 0) {
4142 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4143 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4146 * We don't bother to burden the layout drivers with
4147 * enforcing gd_maxcount, just tell the client to
4148 * come back with a bigger buffer if it's not enough.
4150 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4156 nfserr = nfserr_resource;
4157 if (gdev->gd_notify_types) {
4158 p = xdr_reserve_space(xdr, 4 + 4);
4161 *p++ = cpu_to_be32(1); /* bitmap length */
4162 *p++ = cpu_to_be32(gdev->gd_notify_types);
4164 p = xdr_reserve_space(xdr, 4);
4172 kfree(gdev->gd_device);
4173 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4177 dprintk("%s: maxcount too small\n", __func__);
4178 needed_len = xdr->buf->len + 4 /* notifications */;
4179 xdr_truncate_encode(xdr, starting_len);
4180 p = xdr_reserve_space(xdr, 4);
4182 nfserr = nfserr_resource;
4184 *p++ = cpu_to_be32(needed_len);
4185 nfserr = nfserr_toosmall;
4191 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4192 struct nfsd4_layoutget *lgp)
4194 struct xdr_stream *xdr = &resp->xdr;
4195 const struct nfsd4_layout_ops *ops;
4198 dprintk("%s: err %d\n", __func__, nfserr);
4202 nfserr = nfserr_resource;
4203 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4207 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4208 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4209 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4210 sizeof(stateid_opaque_t));
4212 *p++ = cpu_to_be32(1); /* we always return a single layout */
4213 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4214 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4215 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4216 *p++ = cpu_to_be32(lgp->lg_layout_type);
4218 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4219 nfserr = ops->encode_layoutget(xdr, lgp);
4221 kfree(lgp->lg_content);
4226 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4227 struct nfsd4_layoutcommit *lcp)
4229 struct xdr_stream *xdr = &resp->xdr;
4235 p = xdr_reserve_space(xdr, 4);
4237 return nfserr_resource;
4238 *p++ = cpu_to_be32(lcp->lc_size_chg);
4239 if (lcp->lc_size_chg) {
4240 p = xdr_reserve_space(xdr, 8);
4242 return nfserr_resource;
4243 p = xdr_encode_hyper(p, lcp->lc_newsize);
4250 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4251 struct nfsd4_layoutreturn *lrp)
4253 struct xdr_stream *xdr = &resp->xdr;
4259 p = xdr_reserve_space(xdr, 4);
4261 return nfserr_resource;
4262 *p++ = cpu_to_be32(lrp->lrs_present);
4263 if (lrp->lrs_present)
4264 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4267 #endif /* CONFIG_NFSD_PNFS */
4270 nfsd42_encode_write_res(struct nfsd4_compoundres *resp, struct nfsd42_write_res *write)
4274 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 4 + NFS4_VERIFIER_SIZE);
4276 return nfserr_resource;
4278 *p++ = cpu_to_be32(0);
4279 p = xdr_encode_hyper(p, write->wr_bytes_written);
4280 *p++ = cpu_to_be32(write->wr_stable_how);
4281 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4282 NFS4_VERIFIER_SIZE);
4287 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4288 struct nfsd4_copy *copy)
4293 nfserr = nfsd42_encode_write_res(resp, ©->cp_res);
4297 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4298 *p++ = cpu_to_be32(copy->cp_consecutive);
4299 *p++ = cpu_to_be32(copy->cp_synchronous);
4305 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4306 struct nfsd4_seek *seek)
4313 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4314 *p++ = cpu_to_be32(seek->seek_eof);
4315 p = xdr_encode_hyper(p, seek->seek_pos);
4321 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4326 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4329 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4330 * since we don't need to filter out obsolete ops as this is
4331 * done in the decoding phase.
4333 static nfsd4_enc nfsd4_enc_ops[] = {
4334 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4335 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4336 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4337 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4338 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4339 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4340 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4341 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4342 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4343 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4344 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4345 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4346 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4347 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4348 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4349 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4350 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4351 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4352 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4353 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4354 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4355 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4356 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4357 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4358 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4359 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4360 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4361 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4362 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4363 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4364 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4365 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4366 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4367 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4368 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4369 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4370 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4372 /* NFSv4.1 operations */
4373 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4374 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4375 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4376 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4377 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4378 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4379 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4380 #ifdef CONFIG_NFSD_PNFS
4381 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4382 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4383 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4384 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4385 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4387 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4388 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4389 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4390 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4391 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4393 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4394 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4395 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4396 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4397 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4398 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4399 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4401 /* NFSv4.2 operations */
4402 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4403 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
4404 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4405 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4406 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4407 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4408 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4409 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4410 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4411 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4412 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4413 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4414 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4418 * Calculate whether we still have space to encode repsize bytes.
4419 * There are two considerations:
4420 * - For NFS versions >=4.1, the size of the reply must stay within
4422 * - For all NFS versions, we must stay within limited preallocated
4425 * This is called before the operation is processed, so can only provide
4426 * an upper estimate. For some nonidempotent operations (such as
4427 * getattr), it's not necessarily a problem if that estimate is wrong,
4428 * as we can fail it after processing without significant side effects.
4430 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4432 struct xdr_buf *buf = &resp->rqstp->rq_res;
4433 struct nfsd4_slot *slot = resp->cstate.slot;
4435 if (buf->len + respsize <= buf->buflen)
4437 if (!nfsd4_has_session(&resp->cstate))
4438 return nfserr_resource;
4439 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4441 return nfserr_rep_too_big_to_cache;
4443 return nfserr_rep_too_big;
4447 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4449 struct xdr_stream *xdr = &resp->xdr;
4450 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4451 struct svc_rqst *rqstp = resp->rqstp;
4452 int post_err_offset;
4456 p = xdr_reserve_space(xdr, 8);
4461 *p++ = cpu_to_be32(op->opnum);
4462 post_err_offset = xdr->buf->len;
4464 if (op->opnum == OP_ILLEGAL)
4466 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4467 !nfsd4_enc_ops[op->opnum]);
4468 encoder = nfsd4_enc_ops[op->opnum];
4469 op->status = encoder(resp, op->status, &op->u);
4470 xdr_commit_encode(xdr);
4472 /* nfsd4_check_resp_size guarantees enough room for error status */
4474 int space_needed = 0;
4475 if (!nfsd4_last_compound_op(rqstp))
4476 space_needed = COMPOUND_ERR_SLACK_SPACE;
4477 op->status = nfsd4_check_resp_size(resp, space_needed);
4479 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4480 struct nfsd4_slot *slot = resp->cstate.slot;
4482 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4483 op->status = nfserr_rep_too_big_to_cache;
4485 op->status = nfserr_rep_too_big;
4487 if (op->status == nfserr_resource ||
4488 op->status == nfserr_rep_too_big ||
4489 op->status == nfserr_rep_too_big_to_cache) {
4491 * The operation may have already been encoded or
4492 * partially encoded. No op returns anything additional
4493 * in the case of one of these three errors, so we can
4494 * just truncate back to after the status. But it's a
4495 * bug if we had to do this on a non-idempotent op:
4497 warn_on_nonidempotent_op(op);
4498 xdr_truncate_encode(xdr, post_err_offset);
4501 int len = xdr->buf->len - post_err_offset;
4503 so->so_replay.rp_status = op->status;
4504 so->so_replay.rp_buflen = len;
4505 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4506 so->so_replay.rp_buf, len);
4509 /* Note that op->status is already in network byte order: */
4510 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4514 * Encode the reply stored in the stateowner reply cache
4516 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4517 * previously sent already encoded operation.
4520 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4523 struct nfs4_replay *rp = op->replay;
4527 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4532 *p++ = cpu_to_be32(op->opnum);
4533 *p++ = rp->rp_status; /* already xdr'ed */
4535 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4539 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
4541 return xdr_ressize_check(rqstp, p);
4544 void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
4546 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4548 if (args->ops != args->iops) {
4550 args->ops = args->iops;
4554 while (args->to_free) {
4555 struct svcxdr_tmpbuf *tb = args->to_free;
4556 args->to_free = tb->next;
4562 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
4564 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4566 if (rqstp->rq_arg.head[0].iov_len % 4) {
4567 /* client is nuts */
4568 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4569 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4573 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4574 args->pagelist = rqstp->rq_arg.pages;
4575 args->pagelen = rqstp->rq_arg.page_len;
4577 args->to_free = NULL;
4578 args->ops = args->iops;
4579 args->rqstp = rqstp;
4581 return !nfsd4_decode_compound(args);
4585 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
4588 * All that remains is to write the tag and operation count...
4590 struct nfsd4_compoundres *resp = rqstp->rq_resp;
4591 struct xdr_buf *buf = resp->xdr.buf;
4593 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4594 buf->tail[0].iov_len);
4596 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4599 *p++ = htonl(resp->taglen);
4600 memcpy(p, resp->tag, resp->taglen);
4601 p += XDR_QUADLEN(resp->taglen);
4602 *p++ = htonl(resp->opcnt);
4604 nfsd4_sequence_done(resp);