2 * Server-side XDR for NFSv4
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/statfs.h>
40 #include <linux/utsname.h>
41 #include <linux/pagemap.h>
42 #include <linux/sunrpc/svcauth_gss.h>
53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
54 #include <linux/security.h>
58 #define NFSDDBG_FACILITY NFSDDBG_XDR
61 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
62 * directory in order to indicate to the client that a filesystem boundary is present
63 * We use a fixed fsid for a referral
65 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
66 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
69 check_filename(char *str, int len)
75 if (isdotent(str, len))
76 return nfserr_badname;
77 for (i = 0; i < len; i++)
79 return nfserr_badname;
91 dprintk("NFSD: xdr error (%s:%d)\n", \
92 __FILE__, __LINE__); \
93 status = nfserr_bad_xdr; \
96 #define READMEM(x,nbytes) do { \
98 p += XDR_QUADLEN(nbytes); \
100 #define SAVEMEM(x,nbytes) do { \
101 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
102 savemem(argp, p, nbytes) : \
104 dprintk("NFSD: xdr error (%s:%d)\n", \
105 __FILE__, __LINE__); \
108 p += XDR_QUADLEN(nbytes); \
110 #define COPYMEM(x,nbytes) do { \
111 memcpy((x), p, nbytes); \
112 p += XDR_QUADLEN(nbytes); \
115 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
116 #define READ_BUF(nbytes) do { \
117 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
119 argp->p += XDR_QUADLEN(nbytes); \
120 } else if (!(p = read_buf(argp, nbytes))) { \
121 dprintk("NFSD: xdr error (%s:%d)\n", \
122 __FILE__, __LINE__); \
127 static void next_decode_page(struct nfsd4_compoundargs *argp)
129 argp->p = page_address(argp->pagelist[0]);
131 if (argp->pagelen < PAGE_SIZE) {
132 argp->end = argp->p + (argp->pagelen>>2);
135 argp->end = argp->p + (PAGE_SIZE>>2);
136 argp->pagelen -= PAGE_SIZE;
140 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
142 /* We want more bytes than seem to be available.
143 * Maybe we need a new page, maybe we have just run out
145 unsigned int avail = (char *)argp->end - (char *)argp->p;
147 if (avail + argp->pagelen < nbytes)
149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
151 /* ok, we can do it with the current plus the next page */
152 if (nbytes <= sizeof(argp->tmp))
156 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
162 * The following memcpy is safe because read_buf is always
163 * called with nbytes > avail, and the two cases above both
164 * guarantee p points to at least nbytes bytes.
166 memcpy(p, argp->p, avail);
167 next_decode_page(argp);
168 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
169 argp->p += XDR_QUADLEN(nbytes - avail);
173 static int zero_clientid(clientid_t *clid)
175 return (clid->cl_boot == 0) && (clid->cl_id == 0);
179 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
180 * @argp: NFSv4 compound argument structure
181 * @p: pointer to be freed (with kfree())
183 * Marks @p to be freed when processing the compound operation
184 * described in @argp finishes.
187 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
189 struct svcxdr_tmpbuf *tb;
191 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
194 tb->next = argp->to_free;
200 * For xdr strings that need to be passed to other kernel api's
201 * as null-terminated strings.
203 * Note null-terminating in place usually isn't safe since the
204 * buffer might end on a page boundary.
207 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
209 char *p = svcxdr_tmpalloc(argp, len + 1);
219 * savemem - duplicate a chunk of memory for later processing
220 * @argp: NFSv4 compound argument structure to be freed with
221 * @p: pointer to be duplicated
222 * @nbytes: length to be duplicated
224 * Returns a pointer to a copy of @nbytes bytes of memory at @p
225 * that are preserved until processing of the NFSv4 compound
226 * operation described by @argp finishes.
228 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
232 ret = svcxdr_tmpalloc(argp, nbytes);
235 memcpy(ret, p, nbytes);
240 * We require the high 32 bits of 'seconds' to be 0, and
241 * we ignore all 32 bits of 'nseconds'.
244 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
250 p = xdr_decode_hyper(p, &sec);
252 tv->tv_nsec = be32_to_cpup(p++);
253 if (tv->tv_nsec >= (u32)1000000000)
260 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
270 bmlen = be32_to_cpup(p++);
274 READ_BUF(bmlen << 2);
276 bmval[0] = be32_to_cpup(p++);
278 bmval[1] = be32_to_cpup(p++);
280 bmval[2] = be32_to_cpup(p++);
286 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
287 struct iattr *iattr, struct nfs4_acl **acl,
288 struct xdr_netobj *label)
290 int expected_len, len = 0;
296 if ((status = nfsd4_decode_bitmap(argp, bmval)))
300 expected_len = be32_to_cpup(p++);
302 if (bmval[0] & FATTR4_WORD0_SIZE) {
305 p = xdr_decode_hyper(p, &iattr->ia_size);
306 iattr->ia_valid |= ATTR_SIZE;
308 if (bmval[0] & FATTR4_WORD0_ACL) {
310 struct nfs4_ace *ace;
312 READ_BUF(4); len += 4;
313 nace = be32_to_cpup(p++);
315 if (nace > NFS4_ACL_MAX)
318 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
320 return nfserr_jukebox;
322 (*acl)->naces = nace;
323 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
324 READ_BUF(16); len += 16;
325 ace->type = be32_to_cpup(p++);
326 ace->flag = be32_to_cpup(p++);
327 ace->access_mask = be32_to_cpup(p++);
328 dummy32 = be32_to_cpup(p++);
330 len += XDR_QUADLEN(dummy32) << 2;
331 READMEM(buf, dummy32);
332 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
334 if (ace->whotype != NFS4_ACL_WHO_NAMED)
336 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
337 status = nfsd_map_name_to_gid(argp->rqstp,
338 buf, dummy32, &ace->who_gid);
340 status = nfsd_map_name_to_uid(argp->rqstp,
341 buf, dummy32, &ace->who_uid);
347 if (bmval[1] & FATTR4_WORD1_MODE) {
350 iattr->ia_mode = be32_to_cpup(p++);
351 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
352 iattr->ia_valid |= ATTR_MODE;
354 if (bmval[1] & FATTR4_WORD1_OWNER) {
357 dummy32 = be32_to_cpup(p++);
359 len += (XDR_QUADLEN(dummy32) << 2);
360 READMEM(buf, dummy32);
361 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
363 iattr->ia_valid |= ATTR_UID;
365 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
368 dummy32 = be32_to_cpup(p++);
370 len += (XDR_QUADLEN(dummy32) << 2);
371 READMEM(buf, dummy32);
372 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
374 iattr->ia_valid |= ATTR_GID;
376 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
379 dummy32 = be32_to_cpup(p++);
381 case NFS4_SET_TO_CLIENT_TIME:
383 status = nfsd4_decode_time(argp, &iattr->ia_atime);
386 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
388 case NFS4_SET_TO_SERVER_TIME:
389 iattr->ia_valid |= ATTR_ATIME;
395 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
398 dummy32 = be32_to_cpup(p++);
400 case NFS4_SET_TO_CLIENT_TIME:
402 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
405 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
407 case NFS4_SET_TO_SERVER_TIME:
408 iattr->ia_valid |= ATTR_MTIME;
416 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
417 if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
420 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
423 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
426 dummy32 = be32_to_cpup(p++);
428 if (dummy32 > NFS4_MAXLABELLEN)
429 return nfserr_badlabel;
430 len += (XDR_QUADLEN(dummy32) << 2);
431 READMEM(buf, dummy32);
432 label->len = dummy32;
433 label->data = svcxdr_dupstr(argp, buf, dummy32);
435 return nfserr_jukebox;
439 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
440 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
441 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
442 READ_BUF(expected_len - len);
443 else if (len != expected_len)
450 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
454 READ_BUF(sizeof(stateid_t));
455 sid->si_generation = be32_to_cpup(p++);
456 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
462 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
467 access->ac_req_access = be32_to_cpup(p++);
472 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
480 /* callback_sec_params4 */
482 nr_secflavs = be32_to_cpup(p++);
484 cbs->flavor = (u32)(-1);
486 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
488 for (i = 0; i < nr_secflavs; ++i) {
490 dummy = be32_to_cpup(p++);
493 /* Nothing to read */
494 if (cbs->flavor == (u32)(-1))
495 cbs->flavor = RPC_AUTH_NULL;
500 dummy = be32_to_cpup(p++);
503 dummy = be32_to_cpup(p++);
505 SAVEMEM(machine_name, dummy);
509 uid = be32_to_cpup(p++);
510 gid = be32_to_cpup(p++);
514 dummy = be32_to_cpup(p++);
516 if (cbs->flavor == (u32)(-1)) {
517 kuid_t kuid = make_kuid(&init_user_ns, uid);
518 kgid_t kgid = make_kgid(&init_user_ns, gid);
519 if (uid_valid(kuid) && gid_valid(kgid)) {
522 cbs->flavor = RPC_AUTH_UNIX;
524 dprintk("RPC_AUTH_UNIX with invalid"
525 "uid or gid ignoring!\n");
530 dprintk("RPC_AUTH_GSS callback secflavor "
534 dummy = be32_to_cpup(p++);
535 /* gcbp_handle_from_server */
536 dummy = be32_to_cpup(p++);
538 p += XDR_QUADLEN(dummy);
539 /* gcbp_handle_from_client */
541 dummy = be32_to_cpup(p++);
545 dprintk("Illegal callback secflavor\n");
552 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
557 bc->bc_cb_program = be32_to_cpup(p++);
558 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
563 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
567 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
568 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
569 bcts->dir = be32_to_cpup(p++);
570 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
571 * could help us figure out we should be using it. */
576 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
581 close->cl_seqid = be32_to_cpup(p++);
582 return nfsd4_decode_stateid(argp, &close->cl_stateid);
589 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
594 p = xdr_decode_hyper(p, &commit->co_offset);
595 commit->co_count = be32_to_cpup(p++);
601 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
606 create->cr_type = be32_to_cpup(p++);
607 switch (create->cr_type) {
610 create->cr_datalen = be32_to_cpup(p++);
611 READ_BUF(create->cr_datalen);
612 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
613 if (!create->cr_data)
614 return nfserr_jukebox;
619 create->cr_specdata1 = be32_to_cpup(p++);
620 create->cr_specdata2 = be32_to_cpup(p++);
630 create->cr_namelen = be32_to_cpup(p++);
631 READ_BUF(create->cr_namelen);
632 SAVEMEM(create->cr_name, create->cr_namelen);
633 if ((status = check_filename(create->cr_name, create->cr_namelen)))
636 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
637 &create->cr_acl, &create->cr_label);
645 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
647 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
651 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
653 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
657 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
662 link->li_namelen = be32_to_cpup(p++);
663 READ_BUF(link->li_namelen);
664 SAVEMEM(link->li_name, link->li_namelen);
665 if ((status = check_filename(link->li_name, link->li_namelen)))
672 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
677 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
680 lock->lk_type = be32_to_cpup(p++);
681 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
683 lock->lk_reclaim = be32_to_cpup(p++);
684 p = xdr_decode_hyper(p, &lock->lk_offset);
685 p = xdr_decode_hyper(p, &lock->lk_length);
686 lock->lk_is_new = be32_to_cpup(p++);
688 if (lock->lk_is_new) {
690 lock->lk_new_open_seqid = be32_to_cpup(p++);
691 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
694 READ_BUF(8 + sizeof(clientid_t));
695 lock->lk_new_lock_seqid = be32_to_cpup(p++);
696 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
697 lock->lk_new_owner.len = be32_to_cpup(p++);
698 READ_BUF(lock->lk_new_owner.len);
699 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
701 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
705 lock->lk_old_lock_seqid = be32_to_cpup(p++);
712 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
717 lockt->lt_type = be32_to_cpup(p++);
718 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
720 p = xdr_decode_hyper(p, &lockt->lt_offset);
721 p = xdr_decode_hyper(p, &lockt->lt_length);
722 COPYMEM(&lockt->lt_clientid, 8);
723 lockt->lt_owner.len = be32_to_cpup(p++);
724 READ_BUF(lockt->lt_owner.len);
725 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
731 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
736 locku->lu_type = be32_to_cpup(p++);
737 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
739 locku->lu_seqid = be32_to_cpup(p++);
740 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
744 p = xdr_decode_hyper(p, &locku->lu_offset);
745 p = xdr_decode_hyper(p, &locku->lu_length);
751 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
756 lookup->lo_len = be32_to_cpup(p++);
757 READ_BUF(lookup->lo_len);
758 SAVEMEM(lookup->lo_name, lookup->lo_len);
759 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
765 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
771 w = be32_to_cpup(p++);
772 *share_access = w & NFS4_SHARE_ACCESS_MASK;
773 *deleg_want = w & NFS4_SHARE_WANT_MASK;
775 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
777 switch (w & NFS4_SHARE_ACCESS_MASK) {
778 case NFS4_SHARE_ACCESS_READ:
779 case NFS4_SHARE_ACCESS_WRITE:
780 case NFS4_SHARE_ACCESS_BOTH:
783 return nfserr_bad_xdr;
785 w &= ~NFS4_SHARE_ACCESS_MASK;
788 if (!argp->minorversion)
789 return nfserr_bad_xdr;
790 switch (w & NFS4_SHARE_WANT_MASK) {
791 case NFS4_SHARE_WANT_NO_PREFERENCE:
792 case NFS4_SHARE_WANT_READ_DELEG:
793 case NFS4_SHARE_WANT_WRITE_DELEG:
794 case NFS4_SHARE_WANT_ANY_DELEG:
795 case NFS4_SHARE_WANT_NO_DELEG:
796 case NFS4_SHARE_WANT_CANCEL:
799 return nfserr_bad_xdr;
801 w &= ~NFS4_SHARE_WANT_MASK;
805 if (!deleg_when) /* open_downgrade */
808 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
809 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
810 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
811 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
815 return nfserr_bad_xdr;
818 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
823 *x = be32_to_cpup(p++);
824 /* Note: unlinke access bits, deny bits may be zero. */
825 if (*x & ~NFS4_SHARE_DENY_BOTH)
826 return nfserr_bad_xdr;
829 return nfserr_bad_xdr;
832 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
837 o->len = be32_to_cpup(p++);
839 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
840 return nfserr_bad_xdr;
843 SAVEMEM(o->data, o->len);
846 return nfserr_bad_xdr;
850 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
855 memset(open->op_bmval, 0, sizeof(open->op_bmval));
856 open->op_iattr.ia_valid = 0;
857 open->op_openowner = NULL;
859 open->op_xdr_error = 0;
860 /* seqid, share_access, share_deny, clientid, ownerlen */
862 open->op_seqid = be32_to_cpup(p++);
863 /* decode, yet ignore deleg_when until supported */
864 status = nfsd4_decode_share_access(argp, &open->op_share_access,
865 &open->op_deleg_want, &dummy);
868 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
871 READ_BUF(sizeof(clientid_t));
872 COPYMEM(&open->op_clientid, sizeof(clientid_t));
873 status = nfsd4_decode_opaque(argp, &open->op_owner);
877 open->op_create = be32_to_cpup(p++);
878 switch (open->op_create) {
879 case NFS4_OPEN_NOCREATE:
881 case NFS4_OPEN_CREATE:
883 open->op_createmode = be32_to_cpup(p++);
884 switch (open->op_createmode) {
885 case NFS4_CREATE_UNCHECKED:
886 case NFS4_CREATE_GUARDED:
887 status = nfsd4_decode_fattr(argp, open->op_bmval,
888 &open->op_iattr, &open->op_acl, &open->op_label);
892 case NFS4_CREATE_EXCLUSIVE:
893 READ_BUF(NFS4_VERIFIER_SIZE);
894 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
896 case NFS4_CREATE_EXCLUSIVE4_1:
897 if (argp->minorversion < 1)
899 READ_BUF(NFS4_VERIFIER_SIZE);
900 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
901 status = nfsd4_decode_fattr(argp, open->op_bmval,
902 &open->op_iattr, &open->op_acl, &open->op_label);
916 open->op_claim_type = be32_to_cpup(p++);
917 switch (open->op_claim_type) {
918 case NFS4_OPEN_CLAIM_NULL:
919 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
921 open->op_fname.len = be32_to_cpup(p++);
922 READ_BUF(open->op_fname.len);
923 SAVEMEM(open->op_fname.data, open->op_fname.len);
924 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
927 case NFS4_OPEN_CLAIM_PREVIOUS:
929 open->op_delegate_type = be32_to_cpup(p++);
931 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
932 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
936 open->op_fname.len = be32_to_cpup(p++);
937 READ_BUF(open->op_fname.len);
938 SAVEMEM(open->op_fname.data, open->op_fname.len);
939 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
942 case NFS4_OPEN_CLAIM_FH:
943 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
944 if (argp->minorversion < 1)
948 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
949 if (argp->minorversion < 1)
951 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
963 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
967 if (argp->minorversion >= 1)
968 return nfserr_notsupp;
970 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
974 open_conf->oc_seqid = be32_to_cpup(p++);
980 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
984 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
988 open_down->od_seqid = be32_to_cpup(p++);
989 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
990 &open_down->od_deleg_want, NULL);
993 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1000 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1005 putfh->pf_fhlen = be32_to_cpup(p++);
1006 if (putfh->pf_fhlen > NFS4_FHSIZE)
1008 READ_BUF(putfh->pf_fhlen);
1009 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1015 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1017 if (argp->minorversion == 0)
1019 return nfserr_notsupp;
1023 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1027 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1031 p = xdr_decode_hyper(p, &read->rd_offset);
1032 read->rd_length = be32_to_cpup(p++);
1038 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1043 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1044 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1045 readdir->rd_dircount = be32_to_cpup(p++);
1046 readdir->rd_maxcount = be32_to_cpup(p++);
1047 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1054 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1059 remove->rm_namelen = be32_to_cpup(p++);
1060 READ_BUF(remove->rm_namelen);
1061 SAVEMEM(remove->rm_name, remove->rm_namelen);
1062 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1069 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1074 rename->rn_snamelen = be32_to_cpup(p++);
1075 READ_BUF(rename->rn_snamelen + 4);
1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1077 rename->rn_tnamelen = be32_to_cpup(p++);
1078 READ_BUF(rename->rn_tnamelen);
1079 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1080 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1082 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1089 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1093 if (argp->minorversion >= 1)
1094 return nfserr_notsupp;
1096 READ_BUF(sizeof(clientid_t));
1097 COPYMEM(clientid, sizeof(clientid_t));
1103 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1104 struct nfsd4_secinfo *secinfo)
1109 secinfo->si_namelen = be32_to_cpup(p++);
1110 READ_BUF(secinfo->si_namelen);
1111 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1112 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1119 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1120 struct nfsd4_secinfo_no_name *sin)
1125 sin->sin_style = be32_to_cpup(p++);
1130 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1134 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1137 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1138 &setattr->sa_acl, &setattr->sa_label);
1142 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1146 if (argp->minorversion >= 1)
1147 return nfserr_notsupp;
1149 READ_BUF(NFS4_VERIFIER_SIZE);
1150 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1152 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1154 return nfserr_bad_xdr;
1156 setclientid->se_callback_prog = be32_to_cpup(p++);
1157 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1159 READ_BUF(setclientid->se_callback_netid_len + 4);
1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1161 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1163 READ_BUF(setclientid->se_callback_addr_len + 4);
1164 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1165 setclientid->se_callback_ident = be32_to_cpup(p++);
1171 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1175 if (argp->minorversion >= 1)
1176 return nfserr_notsupp;
1178 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1179 COPYMEM(&scd_c->sc_clientid, 8);
1180 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1185 /* Also used for NVERIFY */
1187 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1191 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1194 /* For convenience's sake, we compare raw xdr'd attributes in
1195 * nfsd4_proc_verify */
1198 verify->ve_attrlen = be32_to_cpup(p++);
1199 READ_BUF(verify->ve_attrlen);
1200 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1206 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1212 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1216 p = xdr_decode_hyper(p, &write->wr_offset);
1217 write->wr_stable_how = be32_to_cpup(p++);
1218 if (write->wr_stable_how > 2)
1220 write->wr_buflen = be32_to_cpup(p++);
1222 /* Sorry .. no magic macros for this.. *
1223 * READ_BUF(write->wr_buflen);
1224 * SAVEMEM(write->wr_buf, write->wr_buflen);
1226 avail = (char*)argp->end - (char*)argp->p;
1227 if (avail + argp->pagelen < write->wr_buflen) {
1228 dprintk("NFSD: xdr error (%s:%d)\n",
1229 __FILE__, __LINE__);
1232 write->wr_head.iov_base = p;
1233 write->wr_head.iov_len = avail;
1234 write->wr_pagelist = argp->pagelist;
1236 len = XDR_QUADLEN(write->wr_buflen) << 2;
1242 pages = len >> PAGE_SHIFT;
1243 argp->pagelist += pages;
1244 argp->pagelen -= pages * PAGE_SIZE;
1245 len -= pages * PAGE_SIZE;
1247 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1249 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1251 argp->p += XDR_QUADLEN(len);
1257 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1261 if (argp->minorversion >= 1)
1262 return nfserr_notsupp;
1265 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1266 rlockowner->rl_owner.len = be32_to_cpup(p++);
1267 READ_BUF(rlockowner->rl_owner.len);
1268 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1270 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1271 return nfserr_inval;
1276 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1277 struct nfsd4_exchange_id *exid)
1282 READ_BUF(NFS4_VERIFIER_SIZE);
1283 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1285 status = nfsd4_decode_opaque(argp, &exid->clname);
1287 return nfserr_bad_xdr;
1290 exid->flags = be32_to_cpup(p++);
1292 /* Ignore state_protect4_a */
1294 exid->spa_how = be32_to_cpup(p++);
1295 switch (exid->spa_how) {
1299 /* spo_must_enforce */
1301 dummy = be32_to_cpup(p++);
1302 READ_BUF(dummy * 4);
1305 /* spo_must_allow */
1307 dummy = be32_to_cpup(p++);
1308 READ_BUF(dummy * 4);
1314 dummy = be32_to_cpup(p++);
1315 READ_BUF(dummy * 4);
1319 dummy = be32_to_cpup(p++);
1320 READ_BUF(dummy * 4);
1323 /* ssp_hash_algs<> */
1325 tmp = be32_to_cpup(p++);
1328 dummy = be32_to_cpup(p++);
1330 p += XDR_QUADLEN(dummy);
1333 /* ssp_encr_algs<> */
1335 tmp = be32_to_cpup(p++);
1338 dummy = be32_to_cpup(p++);
1340 p += XDR_QUADLEN(dummy);
1343 /* ssp_window and ssp_num_gss_handles */
1345 dummy = be32_to_cpup(p++);
1346 dummy = be32_to_cpup(p++);
1352 /* Ignore Implementation ID */
1353 READ_BUF(4); /* nfs_impl_id4 array length */
1354 dummy = be32_to_cpup(p++);
1362 dummy = be32_to_cpup(p++);
1364 p += XDR_QUADLEN(dummy);
1368 dummy = be32_to_cpup(p++);
1370 p += XDR_QUADLEN(dummy);
1380 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1381 struct nfsd4_create_session *sess)
1387 COPYMEM(&sess->clientid, 8);
1388 sess->seqid = be32_to_cpup(p++);
1389 sess->flags = be32_to_cpup(p++);
1391 /* Fore channel attrs */
1393 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1394 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1395 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1396 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1397 sess->fore_channel.maxops = be32_to_cpup(p++);
1398 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1399 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1400 if (sess->fore_channel.nr_rdma_attrs == 1) {
1402 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1403 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1404 dprintk("Too many fore channel attr bitmaps!\n");
1408 /* Back channel attrs */
1410 dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */
1411 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1412 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1413 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1414 sess->back_channel.maxops = be32_to_cpup(p++);
1415 sess->back_channel.maxreqs = be32_to_cpup(p++);
1416 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1417 if (sess->back_channel.nr_rdma_attrs == 1) {
1419 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1420 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1421 dprintk("Too many back channel attr bitmaps!\n");
1426 sess->callback_prog = be32_to_cpup(p++);
1427 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1432 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1433 struct nfsd4_destroy_session *destroy_session)
1436 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1437 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1443 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1444 struct nfsd4_free_stateid *free_stateid)
1448 READ_BUF(sizeof(stateid_t));
1449 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1450 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1456 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1457 struct nfsd4_sequence *seq)
1461 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1462 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1463 seq->seqid = be32_to_cpup(p++);
1464 seq->slotid = be32_to_cpup(p++);
1465 seq->maxslots = be32_to_cpup(p++);
1466 seq->cachethis = be32_to_cpup(p++);
1472 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1476 struct nfsd4_test_stateid_id *stateid;
1479 test_stateid->ts_num_ids = ntohl(*p++);
1481 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1483 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1484 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1486 status = nfserrno(-ENOMEM);
1490 INIT_LIST_HEAD(&stateid->ts_id_list);
1491 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1493 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1502 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1503 status = nfserr_bad_xdr;
1507 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1512 COPYMEM(&dc->clientid, 8);
1517 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1522 rc->rca_one_fs = be32_to_cpup(p++);
1527 #ifdef CONFIG_NFSD_PNFS
1529 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1530 struct nfsd4_getdeviceinfo *gdev)
1535 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1536 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1537 gdev->gd_layout_type = be32_to_cpup(p++);
1538 gdev->gd_maxcount = be32_to_cpup(p++);
1539 num = be32_to_cpup(p++);
1542 gdev->gd_notify_types = be32_to_cpup(p++);
1543 for (i = 1; i < num; i++) {
1544 if (be32_to_cpup(p++)) {
1545 status = nfserr_inval;
1554 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1555 struct nfsd4_layoutget *lgp)
1560 lgp->lg_signal = be32_to_cpup(p++);
1561 lgp->lg_layout_type = be32_to_cpup(p++);
1562 lgp->lg_seg.iomode = be32_to_cpup(p++);
1563 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1564 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1565 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1567 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1572 lgp->lg_maxcount = be32_to_cpup(p++);
1578 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1579 struct nfsd4_layoutcommit *lcp)
1585 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1586 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1587 lcp->lc_reclaim = be32_to_cpup(p++);
1589 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1594 lcp->lc_newoffset = be32_to_cpup(p++);
1595 if (lcp->lc_newoffset) {
1597 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1599 lcp->lc_last_wr = 0;
1601 timechange = be32_to_cpup(p++);
1603 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1607 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1610 lcp->lc_layout_type = be32_to_cpup(p++);
1613 * Save the layout update in XDR format and let the layout driver deal
1616 lcp->lc_up_len = be32_to_cpup(p++);
1617 if (lcp->lc_up_len > 0) {
1618 READ_BUF(lcp->lc_up_len);
1619 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1626 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1627 struct nfsd4_layoutreturn *lrp)
1632 lrp->lr_reclaim = be32_to_cpup(p++);
1633 lrp->lr_layout_type = be32_to_cpup(p++);
1634 lrp->lr_seg.iomode = be32_to_cpup(p++);
1635 lrp->lr_return_type = be32_to_cpup(p++);
1636 if (lrp->lr_return_type == RETURN_FILE) {
1638 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1639 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1641 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1646 lrp->lrf_body_len = be32_to_cpup(p++);
1647 if (lrp->lrf_body_len > 0) {
1648 READ_BUF(lrp->lrf_body_len);
1649 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1652 lrp->lr_seg.offset = 0;
1653 lrp->lr_seg.length = NFS4_MAX_UINT64;
1658 #endif /* CONFIG_NFSD_PNFS */
1661 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1662 struct nfsd4_fallocate *fallocate)
1666 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1671 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1672 xdr_decode_hyper(p, &fallocate->falloc_length);
1678 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1682 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1685 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1689 READ_BUF(8 + 8 + 8);
1690 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1691 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1692 p = xdr_decode_hyper(p, &clone->cl_count);
1697 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1701 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1706 p = xdr_decode_hyper(p, &seek->seek_offset);
1707 seek->seek_whence = be32_to_cpup(p);
1713 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1719 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1721 return nfserr_notsupp;
1724 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1726 static nfsd4_dec nfsd4_dec_ops[] = {
1727 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1728 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1729 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1730 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1731 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1732 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1733 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1734 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1735 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1736 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1737 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1738 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1739 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1740 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1741 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1742 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1743 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1744 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1745 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1746 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1747 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
1748 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1749 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1750 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1751 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1752 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1753 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1754 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1755 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1756 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1757 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1758 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1759 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1760 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1761 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1762 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1763 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1765 /* new operations for NFSv4.1 */
1766 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1767 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1768 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1769 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1770 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1771 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1772 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1773 #ifdef CONFIG_NFSD_PNFS
1774 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
1775 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1776 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
1777 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
1778 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
1780 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1781 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1782 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1783 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1784 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1786 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1787 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1788 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1789 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1790 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1791 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1792 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1794 /* new operations for NFSv4.2 */
1795 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1796 [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp,
1797 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp,
1798 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
1799 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
1800 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
1801 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
1802 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp,
1803 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1804 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp,
1805 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
1806 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
1807 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
1811 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
1813 if (op->opnum < FIRST_NFS4_OP)
1815 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
1817 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
1819 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
1825 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1828 struct nfsd4_op *op;
1829 bool cachethis = false;
1830 int auth_slack= argp->rqstp->rq_auth_slack;
1831 int max_reply = auth_slack + 8; /* opcnt, status */
1837 argp->taglen = be32_to_cpup(p++);
1838 READ_BUF(argp->taglen + 8);
1839 SAVEMEM(argp->tag, argp->taglen);
1840 argp->minorversion = be32_to_cpup(p++);
1841 argp->opcnt = be32_to_cpup(p++);
1842 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1844 if (argp->taglen > NFSD4_MAX_TAGLEN)
1846 if (argp->opcnt > 100)
1849 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1850 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1852 argp->ops = argp->iops;
1853 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1858 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1861 for (i = 0; i < argp->opcnt; i++) {
1866 op->opnum = be32_to_cpup(p++);
1868 if (nfsd4_opnum_in_range(argp, op))
1869 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1871 op->opnum = OP_ILLEGAL;
1872 op->status = nfserr_op_illegal;
1875 * We'll try to cache the result in the DRC if any one
1876 * op in the compound wants to be cached:
1878 cachethis |= nfsd4_cache_this_op(op);
1880 if (op->opnum == OP_READ) {
1882 readbytes += nfsd4_max_reply(argp->rqstp, op);
1884 max_reply += nfsd4_max_reply(argp->rqstp, op);
1886 * OP_LOCK may return a conflicting lock. (Special case
1887 * because it will just skip encoding this if it runs
1888 * out of xdr buffer space, and it is the only operation
1889 * that behaves this way.)
1891 if (op->opnum == OP_LOCK)
1892 max_reply += NFS4_OPAQUE_LIMIT;
1899 /* Sessions make the DRC unnecessary: */
1900 if (argp->minorversion)
1902 svc_reserve(argp->rqstp, max_reply + readbytes);
1903 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1905 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1906 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1911 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1913 if (IS_I_VERSION(inode)) {
1914 p = xdr_encode_hyper(p, inode->i_version);
1916 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1917 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1922 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1924 *p++ = cpu_to_be32(c->atomic);
1925 if (c->change_supported) {
1926 p = xdr_encode_hyper(p, c->before_change);
1927 p = xdr_encode_hyper(p, c->after_change);
1929 *p++ = cpu_to_be32(c->before_ctime_sec);
1930 *p++ = cpu_to_be32(c->before_ctime_nsec);
1931 *p++ = cpu_to_be32(c->after_ctime_sec);
1932 *p++ = cpu_to_be32(c->after_ctime_nsec);
1937 /* Encode as an array of strings the string given with components
1938 * separated @sep, escaped with esc_enter and esc_exit.
1940 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1941 char *components, char esc_enter,
1947 int strlen, count=0;
1948 char *str, *end, *next;
1950 dprintk("nfsd4_encode_components(%s)\n", components);
1952 pathlen_offset = xdr->buf->len;
1953 p = xdr_reserve_space(xdr, 4);
1955 return nfserr_resource;
1956 p++; /* We will fill this in with @count later */
1958 end = str = components;
1960 bool found_esc = false;
1962 /* try to parse as esc_start, ..., esc_end, sep */
1963 if (*str == esc_enter) {
1964 for (; *end && (*end != esc_exit); end++)
1965 /* find esc_exit or end of string */;
1967 if (*end && (!*next || *next == sep)) {
1974 for (; *end && (*end != sep); end++)
1975 /* find sep or end of string */;
1979 p = xdr_reserve_space(xdr, strlen + 4);
1981 return nfserr_resource;
1982 p = xdr_encode_opaque(p, str, strlen);
1992 pathlen = htonl(count);
1993 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1997 /* Encode as an array of strings the string given with components
2000 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2003 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2007 * encode a location element of a fs_locations structure
2009 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2010 struct nfsd4_fs_location *location)
2014 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2018 status = nfsd4_encode_components(xdr, '/', location->path);
2025 * Encode a path in RFC3530 'pathname4' format
2027 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2028 const struct path *root,
2029 const struct path *path)
2031 struct path cur = *path;
2033 struct dentry **components = NULL;
2034 unsigned int ncomponents = 0;
2035 __be32 err = nfserr_jukebox;
2037 dprintk("nfsd4_encode_components(");
2040 /* First walk the path up to the nfsd root, and store the
2041 * dentries/path components in an array.
2044 if (path_equal(&cur, root))
2046 if (cur.dentry == cur.mnt->mnt_root) {
2047 if (follow_up(&cur))
2051 if ((ncomponents & 15) == 0) {
2052 struct dentry **new;
2053 new = krealloc(components,
2054 sizeof(*new) * (ncomponents + 16),
2060 components[ncomponents++] = cur.dentry;
2061 cur.dentry = dget_parent(cur.dentry);
2063 err = nfserr_resource;
2064 p = xdr_reserve_space(xdr, 4);
2067 *p++ = cpu_to_be32(ncomponents);
2069 while (ncomponents) {
2070 struct dentry *dentry = components[ncomponents - 1];
2073 spin_lock(&dentry->d_lock);
2074 len = dentry->d_name.len;
2075 p = xdr_reserve_space(xdr, len + 4);
2077 spin_unlock(&dentry->d_lock);
2080 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2081 dprintk("/%pd", dentry);
2082 spin_unlock(&dentry->d_lock);
2091 dput(components[--ncomponents]);
2097 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2098 struct svc_rqst *rqstp, const struct path *path)
2100 struct svc_export *exp_ps;
2103 exp_ps = rqst_find_fsidzero_export(rqstp);
2105 return nfserrno(PTR_ERR(exp_ps));
2106 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2112 * encode a fs_locations structure
2114 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2115 struct svc_rqst *rqstp, struct svc_export *exp)
2120 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2122 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2125 p = xdr_reserve_space(xdr, 4);
2127 return nfserr_resource;
2128 *p++ = cpu_to_be32(fslocs->locations_count);
2129 for (i=0; i<fslocs->locations_count; i++) {
2130 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2137 static u32 nfs4_file_type(umode_t mode)
2139 switch (mode & S_IFMT) {
2140 case S_IFIFO: return NF4FIFO;
2141 case S_IFCHR: return NF4CHR;
2142 case S_IFDIR: return NF4DIR;
2143 case S_IFBLK: return NF4BLK;
2144 case S_IFLNK: return NF4LNK;
2145 case S_IFREG: return NF4REG;
2146 case S_IFSOCK: return NF4SOCK;
2147 default: return NF4BAD;
2151 static inline __be32
2152 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2153 struct nfs4_ace *ace)
2155 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2156 return nfs4_acl_write_who(xdr, ace->whotype);
2157 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2158 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2160 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2163 static inline __be32
2164 nfsd4_encode_layout_type(struct xdr_stream *xdr, enum pnfs_layouttype layout_type)
2169 p = xdr_reserve_space(xdr, 8);
2171 return nfserr_resource;
2172 *p++ = cpu_to_be32(1);
2173 *p++ = cpu_to_be32(layout_type);
2175 p = xdr_reserve_space(xdr, 4);
2177 return nfserr_resource;
2178 *p++ = cpu_to_be32(0);
2184 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2185 FATTR4_WORD0_RDATTR_ERROR)
2186 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2187 #define WORD2_ABSENT_FS_ATTRS 0
2189 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2190 static inline __be32
2191 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2192 void *context, int len)
2196 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2198 return nfserr_resource;
2201 * For now we use a 0 here to indicate the null translation; in
2202 * the future we may place a call to translation code here.
2204 *p++ = cpu_to_be32(0); /* lfs */
2205 *p++ = cpu_to_be32(0); /* pi */
2206 p = xdr_encode_opaque(p, context, len);
2210 static inline __be32
2211 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2212 void *context, int len)
2216 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2218 /* As per referral draft: */
2219 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2220 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2221 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2222 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2223 *rdattr_err = NFSERR_MOVED;
2225 return nfserr_moved;
2227 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2228 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2229 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2234 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2236 struct path path = exp->ex_path;
2240 while (follow_up(&path)) {
2241 if (path.dentry != path.mnt->mnt_root)
2244 err = vfs_getattr(&path, stat);
2250 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2255 p = xdr_reserve_space(xdr, 16);
2258 *p++ = cpu_to_be32(3);
2259 *p++ = cpu_to_be32(bmval0);
2260 *p++ = cpu_to_be32(bmval1);
2261 *p++ = cpu_to_be32(bmval2);
2262 } else if (bmval1) {
2263 p = xdr_reserve_space(xdr, 12);
2266 *p++ = cpu_to_be32(2);
2267 *p++ = cpu_to_be32(bmval0);
2268 *p++ = cpu_to_be32(bmval1);
2270 p = xdr_reserve_space(xdr, 8);
2273 *p++ = cpu_to_be32(1);
2274 *p++ = cpu_to_be32(bmval0);
2279 return nfserr_resource;
2283 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2287 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2288 struct svc_export *exp,
2289 struct dentry *dentry, u32 *bmval,
2290 struct svc_rqst *rqstp, int ignore_crossmnt)
2292 u32 bmval0 = bmval[0];
2293 u32 bmval1 = bmval[1];
2294 u32 bmval2 = bmval[2];
2296 struct svc_fh *tempfh = NULL;
2297 struct kstatfs statfs;
2299 int starting_len = xdr->buf->len;
2307 struct nfs4_acl *acl = NULL;
2308 void *context = NULL;
2310 bool contextsupport = false;
2311 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2312 u32 minorversion = resp->cstate.minorversion;
2313 struct path path = {
2314 .mnt = exp->ex_path.mnt,
2317 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2319 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2320 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2321 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2322 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2324 if (exp->ex_fslocs.migrated) {
2325 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2330 err = vfs_getattr(&path, &stat);
2333 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2334 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2335 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2336 FATTR4_WORD1_SPACE_TOTAL))) {
2337 err = vfs_statfs(&path, &statfs);
2341 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2342 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2343 status = nfserr_jukebox;
2346 fh_init(tempfh, NFS4_FHSIZE);
2347 status = fh_compose(tempfh, exp, dentry, NULL);
2352 if (bmval0 & FATTR4_WORD0_ACL) {
2353 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2354 if (err == -EOPNOTSUPP)
2355 bmval0 &= ~FATTR4_WORD0_ACL;
2356 else if (err == -EINVAL) {
2357 status = nfserr_attrnotsupp;
2359 } else if (err != 0)
2363 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2364 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2365 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2366 err = security_inode_getsecctx(d_inode(dentry),
2367 &context, &contextlen);
2368 contextsupport = (err == 0);
2369 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2370 if (err == -EOPNOTSUPP)
2371 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2376 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2378 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2382 attrlen_offset = xdr->buf->len;
2383 p = xdr_reserve_space(xdr, 4);
2386 p++; /* to be backfilled later */
2388 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2389 u32 word0 = nfsd_suppattrs0(minorversion);
2390 u32 word1 = nfsd_suppattrs1(minorversion);
2391 u32 word2 = nfsd_suppattrs2(minorversion);
2393 if (!IS_POSIXACL(dentry->d_inode))
2394 word0 &= ~FATTR4_WORD0_ACL;
2395 if (!contextsupport)
2396 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2398 p = xdr_reserve_space(xdr, 12);
2401 *p++ = cpu_to_be32(2);
2402 *p++ = cpu_to_be32(word0);
2403 *p++ = cpu_to_be32(word1);
2405 p = xdr_reserve_space(xdr, 16);
2408 *p++ = cpu_to_be32(3);
2409 *p++ = cpu_to_be32(word0);
2410 *p++ = cpu_to_be32(word1);
2411 *p++ = cpu_to_be32(word2);
2414 if (bmval0 & FATTR4_WORD0_TYPE) {
2415 p = xdr_reserve_space(xdr, 4);
2418 dummy = nfs4_file_type(stat.mode);
2419 if (dummy == NF4BAD) {
2420 status = nfserr_serverfault;
2423 *p++ = cpu_to_be32(dummy);
2425 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2426 p = xdr_reserve_space(xdr, 4);
2429 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2430 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2432 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2433 NFS4_FH_VOL_RENAME);
2435 if (bmval0 & FATTR4_WORD0_CHANGE) {
2436 p = xdr_reserve_space(xdr, 8);
2439 p = encode_change(p, &stat, d_inode(dentry));
2441 if (bmval0 & FATTR4_WORD0_SIZE) {
2442 p = xdr_reserve_space(xdr, 8);
2445 p = xdr_encode_hyper(p, stat.size);
2447 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2448 p = xdr_reserve_space(xdr, 4);
2451 *p++ = cpu_to_be32(1);
2453 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2454 p = xdr_reserve_space(xdr, 4);
2457 *p++ = cpu_to_be32(1);
2459 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2460 p = xdr_reserve_space(xdr, 4);
2463 *p++ = cpu_to_be32(0);
2465 if (bmval0 & FATTR4_WORD0_FSID) {
2466 p = xdr_reserve_space(xdr, 16);
2469 if (exp->ex_fslocs.migrated) {
2470 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2471 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2472 } else switch(fsid_source(fhp)) {
2473 case FSIDSOURCE_FSID:
2474 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2475 p = xdr_encode_hyper(p, (u64)0);
2477 case FSIDSOURCE_DEV:
2478 *p++ = cpu_to_be32(0);
2479 *p++ = cpu_to_be32(MAJOR(stat.dev));
2480 *p++ = cpu_to_be32(0);
2481 *p++ = cpu_to_be32(MINOR(stat.dev));
2483 case FSIDSOURCE_UUID:
2484 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2489 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2490 p = xdr_reserve_space(xdr, 4);
2493 *p++ = cpu_to_be32(0);
2495 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2496 p = xdr_reserve_space(xdr, 4);
2499 *p++ = cpu_to_be32(nn->nfsd4_lease);
2501 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2502 p = xdr_reserve_space(xdr, 4);
2505 *p++ = cpu_to_be32(rdattr_err);
2507 if (bmval0 & FATTR4_WORD0_ACL) {
2508 struct nfs4_ace *ace;
2511 p = xdr_reserve_space(xdr, 4);
2515 *p++ = cpu_to_be32(0);
2518 p = xdr_reserve_space(xdr, 4);
2521 *p++ = cpu_to_be32(acl->naces);
2523 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2524 p = xdr_reserve_space(xdr, 4*3);
2527 *p++ = cpu_to_be32(ace->type);
2528 *p++ = cpu_to_be32(ace->flag);
2529 *p++ = cpu_to_be32(ace->access_mask &
2531 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2537 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2538 p = xdr_reserve_space(xdr, 4);
2541 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2542 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2544 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2545 p = xdr_reserve_space(xdr, 4);
2548 *p++ = cpu_to_be32(1);
2550 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2551 p = xdr_reserve_space(xdr, 4);
2554 *p++ = cpu_to_be32(0);
2556 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2557 p = xdr_reserve_space(xdr, 4);
2560 *p++ = cpu_to_be32(1);
2562 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2563 p = xdr_reserve_space(xdr, 4);
2566 *p++ = cpu_to_be32(1);
2568 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2569 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2572 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2573 fhp->fh_handle.fh_size);
2575 if (bmval0 & FATTR4_WORD0_FILEID) {
2576 p = xdr_reserve_space(xdr, 8);
2579 p = xdr_encode_hyper(p, stat.ino);
2581 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2582 p = xdr_reserve_space(xdr, 8);
2585 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2587 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2588 p = xdr_reserve_space(xdr, 8);
2591 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2593 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2594 p = xdr_reserve_space(xdr, 8);
2597 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2599 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2600 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2604 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2605 p = xdr_reserve_space(xdr, 4);
2608 *p++ = cpu_to_be32(1);
2610 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2611 p = xdr_reserve_space(xdr, 8);
2614 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2616 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2617 p = xdr_reserve_space(xdr, 4);
2620 *p++ = cpu_to_be32(255);
2622 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2623 p = xdr_reserve_space(xdr, 4);
2626 *p++ = cpu_to_be32(statfs.f_namelen);
2628 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2629 p = xdr_reserve_space(xdr, 8);
2632 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2634 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2635 p = xdr_reserve_space(xdr, 8);
2638 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2640 if (bmval1 & FATTR4_WORD1_MODE) {
2641 p = xdr_reserve_space(xdr, 4);
2644 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2646 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2647 p = xdr_reserve_space(xdr, 4);
2650 *p++ = cpu_to_be32(1);
2652 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2653 p = xdr_reserve_space(xdr, 4);
2656 *p++ = cpu_to_be32(stat.nlink);
2658 if (bmval1 & FATTR4_WORD1_OWNER) {
2659 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2663 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2664 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2668 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2669 p = xdr_reserve_space(xdr, 8);
2672 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2673 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2675 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2676 p = xdr_reserve_space(xdr, 8);
2679 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2680 p = xdr_encode_hyper(p, dummy64);
2682 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2683 p = xdr_reserve_space(xdr, 8);
2686 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2687 p = xdr_encode_hyper(p, dummy64);
2689 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2690 p = xdr_reserve_space(xdr, 8);
2693 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2694 p = xdr_encode_hyper(p, dummy64);
2696 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2697 p = xdr_reserve_space(xdr, 8);
2700 dummy64 = (u64)stat.blocks << 9;
2701 p = xdr_encode_hyper(p, dummy64);
2703 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2704 p = xdr_reserve_space(xdr, 12);
2707 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2708 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2710 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2711 p = xdr_reserve_space(xdr, 12);
2714 *p++ = cpu_to_be32(0);
2715 *p++ = cpu_to_be32(1);
2716 *p++ = cpu_to_be32(0);
2718 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2719 p = xdr_reserve_space(xdr, 12);
2722 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2723 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2725 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2726 p = xdr_reserve_space(xdr, 12);
2729 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2730 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2732 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2733 struct kstat parent_stat;
2736 p = xdr_reserve_space(xdr, 8);
2740 * Get parent's attributes if not ignoring crossmount
2741 * and this is the root of a cross-mounted filesystem.
2743 if (ignore_crossmnt == 0 &&
2744 dentry == exp->ex_path.mnt->mnt_root) {
2745 err = get_parent_attributes(exp, &parent_stat);
2748 ino = parent_stat.ino;
2750 p = xdr_encode_hyper(p, ino);
2752 #ifdef CONFIG_NFSD_PNFS
2753 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2754 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type);
2759 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2760 status = nfsd4_encode_layout_type(xdr, exp->ex_layout_type);
2765 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2766 p = xdr_reserve_space(xdr, 4);
2769 *p++ = cpu_to_be32(stat.blksize);
2771 #endif /* CONFIG_NFSD_PNFS */
2772 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2773 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2774 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2775 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2780 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2781 status = nfsd4_encode_security_label(xdr, rqstp, context,
2787 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2788 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2792 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2794 security_release_secctx(context, contextlen);
2795 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2802 xdr_truncate_encode(xdr, starting_len);
2805 status = nfserrno(err);
2808 status = nfserr_resource;
2812 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2813 struct xdr_buf *buf, __be32 *p, int bytes)
2815 xdr->scratch.iov_len = 0;
2816 memset(buf, 0, sizeof(struct xdr_buf));
2817 buf->head[0].iov_base = p;
2818 buf->head[0].iov_len = 0;
2821 xdr->iov = buf->head;
2823 xdr->end = (void *)p + bytes;
2824 buf->buflen = bytes;
2827 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2828 struct svc_fh *fhp, struct svc_export *exp,
2829 struct dentry *dentry, u32 *bmval,
2830 struct svc_rqst *rqstp, int ignore_crossmnt)
2832 struct xdr_buf dummy;
2833 struct xdr_stream xdr;
2836 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2837 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2843 static inline int attributes_need_mount(u32 *bmval)
2845 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2847 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2853 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2854 const char *name, int namlen)
2856 struct svc_export *exp = cd->rd_fhp->fh_export;
2857 struct dentry *dentry;
2859 int ignore_crossmnt = 0;
2861 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2863 return nfserrno(PTR_ERR(dentry));
2864 if (d_really_is_negative(dentry)) {
2866 * we're not holding the i_mutex here, so there's
2867 * a window where this directory entry could have gone
2871 return nfserr_noent;
2876 * In the case of a mountpoint, the client may be asking for
2877 * attributes that are only properties of the underlying filesystem
2878 * as opposed to the cross-mounted file system. In such a case,
2879 * we will not follow the cross mount and will fill the attribtutes
2880 * directly from the mountpoint dentry.
2882 if (nfsd_mountpoint(dentry, exp)) {
2885 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2886 && !attributes_need_mount(cd->rd_bmval)) {
2887 ignore_crossmnt = 1;
2891 * Why the heck aren't we just using nfsd_lookup??
2892 * Different "."/".." handling? Something else?
2893 * At least, add a comment here to explain....
2895 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2897 nfserr = nfserrno(err);
2900 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2906 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2907 cd->rd_rqstp, ignore_crossmnt);
2915 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2919 p = xdr_reserve_space(xdr, 20);
2923 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2924 *p++ = htonl(0); /* bmval1 */
2926 *p++ = htonl(4); /* attribute length */
2927 *p++ = nfserr; /* no htonl */
2932 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2933 loff_t offset, u64 ino, unsigned int d_type)
2935 struct readdir_cd *ccd = ccdv;
2936 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2937 struct xdr_stream *xdr = cd->xdr;
2938 int start_offset = xdr->buf->len;
2940 u32 name_and_cookie;
2942 __be32 nfserr = nfserr_toosmall;
2946 /* In nfsv4, "." and ".." never make it onto the wire.. */
2947 if (name && isdotent(name, namlen)) {
2948 cd->common.err = nfs_ok;
2952 if (cd->cookie_offset) {
2953 wire_offset = cpu_to_be64(offset);
2954 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2958 p = xdr_reserve_space(xdr, 4);
2961 *p++ = xdr_one; /* mark entry present */
2962 cookie_offset = xdr->buf->len;
2963 p = xdr_reserve_space(xdr, 3*4 + namlen);
2966 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2967 p = xdr_encode_array(p, name, namlen); /* name length & name */
2969 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2973 case nfserr_resource:
2974 nfserr = nfserr_toosmall;
2977 xdr_truncate_encode(xdr, start_offset);
2981 * If the client requested the RDATTR_ERROR attribute,
2982 * we stuff the error code into this attribute
2983 * and continue. If this attribute was not requested,
2984 * then in accordance with the spec, we fail the
2985 * entire READDIR operation(!)
2987 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2989 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2991 nfserr = nfserr_toosmall;
2995 nfserr = nfserr_toosmall;
2996 entry_bytes = xdr->buf->len - start_offset;
2997 if (entry_bytes > cd->rd_maxcount)
2999 cd->rd_maxcount -= entry_bytes;
3001 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3002 * let's always let through the first entry, at least:
3004 if (!cd->rd_dircount)
3006 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3007 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3009 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3011 cd->cookie_offset = cookie_offset;
3013 cd->common.err = nfs_ok;
3016 xdr_truncate_encode(xdr, start_offset);
3017 cd->common.err = nfserr;
3022 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3026 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3028 return nfserr_resource;
3029 *p++ = cpu_to_be32(sid->si_generation);
3030 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3031 sizeof(stateid_opaque_t));
3036 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3038 struct xdr_stream *xdr = &resp->xdr;
3042 p = xdr_reserve_space(xdr, 8);
3044 return nfserr_resource;
3045 *p++ = cpu_to_be32(access->ac_supported);
3046 *p++ = cpu_to_be32(access->ac_resp_access);
3051 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3053 struct xdr_stream *xdr = &resp->xdr;
3057 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3059 return nfserr_resource;
3060 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3061 NFS4_MAX_SESSIONID_LEN);
3062 *p++ = cpu_to_be32(bcts->dir);
3063 /* Sorry, we do not yet support RDMA over 4.1: */
3064 *p++ = cpu_to_be32(0);
3070 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3072 struct xdr_stream *xdr = &resp->xdr;
3075 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3082 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3084 struct xdr_stream *xdr = &resp->xdr;
3088 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3090 return nfserr_resource;
3091 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3092 NFS4_VERIFIER_SIZE);
3098 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3100 struct xdr_stream *xdr = &resp->xdr;
3104 p = xdr_reserve_space(xdr, 20);
3106 return nfserr_resource;
3107 encode_cinfo(p, &create->cr_cinfo);
3108 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3109 create->cr_bmval[1], create->cr_bmval[2]);
3115 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3117 struct svc_fh *fhp = getattr->ga_fhp;
3118 struct xdr_stream *xdr = &resp->xdr;
3123 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3130 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3132 struct xdr_stream *xdr = &resp->xdr;
3133 struct svc_fh *fhp = *fhpp;
3138 len = fhp->fh_handle.fh_size;
3139 p = xdr_reserve_space(xdr, len + 4);
3141 return nfserr_resource;
3142 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3148 * Including all fields other than the name, a LOCK4denied structure requires
3149 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3152 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3154 struct xdr_netobj *conf = &ld->ld_owner;
3158 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3161 * Don't fail to return the result just because we can't
3162 * return the conflicting open:
3170 return nfserr_resource;
3172 p = xdr_encode_hyper(p, ld->ld_start);
3173 p = xdr_encode_hyper(p, ld->ld_length);
3174 *p++ = cpu_to_be32(ld->ld_type);
3176 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3177 p = xdr_encode_opaque(p, conf->data, conf->len);
3179 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3180 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3181 *p++ = cpu_to_be32(0); /* length of owner name */
3183 return nfserr_denied;
3187 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3189 struct xdr_stream *xdr = &resp->xdr;
3192 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3193 else if (nfserr == nfserr_denied)
3194 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3200 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3202 struct xdr_stream *xdr = &resp->xdr;
3204 if (nfserr == nfserr_denied)
3205 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3210 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3212 struct xdr_stream *xdr = &resp->xdr;
3215 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3222 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3224 struct xdr_stream *xdr = &resp->xdr;
3228 p = xdr_reserve_space(xdr, 20);
3230 return nfserr_resource;
3231 p = encode_cinfo(p, &link->li_cinfo);
3238 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3240 struct xdr_stream *xdr = &resp->xdr;
3246 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3249 p = xdr_reserve_space(xdr, 24);
3251 return nfserr_resource;
3252 p = encode_cinfo(p, &open->op_cinfo);
3253 *p++ = cpu_to_be32(open->op_rflags);
3255 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3260 p = xdr_reserve_space(xdr, 4);
3262 return nfserr_resource;
3264 *p++ = cpu_to_be32(open->op_delegate_type);
3265 switch (open->op_delegate_type) {
3266 case NFS4_OPEN_DELEGATE_NONE:
3268 case NFS4_OPEN_DELEGATE_READ:
3269 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3272 p = xdr_reserve_space(xdr, 20);
3274 return nfserr_resource;
3275 *p++ = cpu_to_be32(open->op_recall);
3278 * TODO: ACE's in delegations
3280 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3281 *p++ = cpu_to_be32(0);
3282 *p++ = cpu_to_be32(0);
3283 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3285 case NFS4_OPEN_DELEGATE_WRITE:
3286 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3289 p = xdr_reserve_space(xdr, 32);
3291 return nfserr_resource;
3292 *p++ = cpu_to_be32(0);
3295 * TODO: space_limit's in delegations
3297 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3298 *p++ = cpu_to_be32(~(u32)0);
3299 *p++ = cpu_to_be32(~(u32)0);
3302 * TODO: ACE's in delegations
3304 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3305 *p++ = cpu_to_be32(0);
3306 *p++ = cpu_to_be32(0);
3307 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3309 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3310 switch (open->op_why_no_deleg) {
3311 case WND4_CONTENTION:
3313 p = xdr_reserve_space(xdr, 8);
3315 return nfserr_resource;
3316 *p++ = cpu_to_be32(open->op_why_no_deleg);
3317 /* deleg signaling not supported yet: */
3318 *p++ = cpu_to_be32(0);
3321 p = xdr_reserve_space(xdr, 4);
3323 return nfserr_resource;
3324 *p++ = cpu_to_be32(open->op_why_no_deleg);
3330 /* XXX save filehandle here */
3336 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3338 struct xdr_stream *xdr = &resp->xdr;
3341 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3347 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3349 struct xdr_stream *xdr = &resp->xdr;
3352 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3357 static __be32 nfsd4_encode_splice_read(
3358 struct nfsd4_compoundres *resp,
3359 struct nfsd4_read *read,
3360 struct file *file, unsigned long maxcount)
3362 struct xdr_stream *xdr = &resp->xdr;
3363 struct xdr_buf *buf = xdr->buf;
3367 __be32 *p = xdr->p - 2;
3369 /* Make sure there will be room for padding if needed */
3370 if (xdr->end - xdr->p < 1)
3371 return nfserr_resource;
3373 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3374 read->rd_offset, &maxcount);
3377 * nfsd_splice_actor may have already messed with the
3378 * page length; reset it so as not to confuse
3379 * xdr_truncate_encode:
3385 eof = (read->rd_offset + maxcount >=
3386 d_inode(read->rd_fhp->fh_dentry)->i_size);
3388 *(p++) = htonl(eof);
3389 *(p++) = htonl(maxcount);
3391 buf->page_len = maxcount;
3392 buf->len += maxcount;
3393 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3396 /* Use rest of head for padding and remaining ops: */
3397 buf->tail[0].iov_base = xdr->p;
3398 buf->tail[0].iov_len = 0;
3399 xdr->iov = buf->tail;
3401 int pad = 4 - (maxcount&3);
3405 buf->tail[0].iov_base += maxcount&3;
3406 buf->tail[0].iov_len = pad;
3410 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3411 buf->buflen - buf->len);
3412 buf->buflen = buf->len + space_left;
3413 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3418 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3419 struct nfsd4_read *read,
3420 struct file *file, unsigned long maxcount)
3422 struct xdr_stream *xdr = &resp->xdr;
3425 int starting_len = xdr->buf->len - 8;
3437 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3438 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3440 resp->rqstp->rq_vec[v].iov_base = p;
3441 resp->rqstp->rq_vec[v].iov_len = thislen;
3446 thislen = min_t(long, len, PAGE_SIZE);
3447 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3449 resp->rqstp->rq_vec[v].iov_base = p;
3450 resp->rqstp->rq_vec[v].iov_len = thislen;
3456 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3457 read->rd_vlen, &maxcount);
3460 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3462 eof = (read->rd_offset + maxcount >=
3463 d_inode(read->rd_fhp->fh_dentry)->i_size);
3466 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3467 tmp = htonl(maxcount);
3468 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3470 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3471 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3478 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3479 struct nfsd4_read *read)
3481 unsigned long maxcount;
3482 struct xdr_stream *xdr = &resp->xdr;
3483 struct file *file = read->rd_filp;
3484 int starting_len = xdr->buf->len;
3485 struct raparms *ra = NULL;
3491 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3493 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3494 nfserr = nfserr_resource;
3497 if (resp->xdr.buf->page_len &&
3498 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3500 nfserr = nfserr_resource;
3503 xdr_commit_encode(xdr);
3505 maxcount = svc_max_payload(resp->rqstp);
3506 maxcount = min_t(unsigned long, maxcount,
3507 (xdr->buf->buflen - xdr->buf->len));
3508 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3510 if (read->rd_tmp_file)
3511 ra = nfsd_init_raparms(file);
3513 if (file->f_op->splice_read &&
3514 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3515 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3517 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3520 nfsd_put_raparams(file, ra);
3523 xdr_truncate_encode(xdr, starting_len);
3532 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3537 struct xdr_stream *xdr = &resp->xdr;
3538 int length_offset = xdr->buf->len;
3544 p = xdr_reserve_space(xdr, 4);
3546 return nfserr_resource;
3547 maxcount = PAGE_SIZE;
3549 p = xdr_reserve_space(xdr, maxcount);
3551 return nfserr_resource;
3553 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3554 * if they would overflow the buffer. Is this kosher in NFSv4? If
3555 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3556 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3558 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3559 (char *)p, &maxcount);
3560 if (nfserr == nfserr_isdir)
3561 nfserr = nfserr_inval;
3563 xdr_truncate_encode(xdr, length_offset);
3567 wire_count = htonl(maxcount);
3568 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3569 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3571 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3572 &zero, 4 - (maxcount&3));
3577 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3583 struct xdr_stream *xdr = &resp->xdr;
3584 int starting_len = xdr->buf->len;
3590 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3592 return nfserr_resource;
3594 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3595 *p++ = cpu_to_be32(0);
3596 *p++ = cpu_to_be32(0);
3597 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3598 - (char *)resp->xdr.buf->head[0].iov_base;
3601 * Number of bytes left for directory entries allowing for the
3602 * final 8 bytes of the readdir and a following failed op:
3604 bytes_left = xdr->buf->buflen - xdr->buf->len
3605 - COMPOUND_ERR_SLACK_SPACE - 8;
3606 if (bytes_left < 0) {
3607 nfserr = nfserr_resource;
3610 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3612 * Note the rfc defines rd_maxcount as the size of the
3613 * READDIR4resok structure, which includes the verifier above
3614 * and the 8 bytes encoded at the end of this function:
3616 if (maxcount < 16) {
3617 nfserr = nfserr_toosmall;
3620 maxcount = min_t(int, maxcount-16, bytes_left);
3622 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3623 if (!readdir->rd_dircount)
3624 readdir->rd_dircount = INT_MAX;
3627 readdir->rd_maxcount = maxcount;
3628 readdir->common.err = 0;
3629 readdir->cookie_offset = 0;
3631 offset = readdir->rd_cookie;
3632 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3634 &readdir->common, nfsd4_encode_dirent);
3635 if (nfserr == nfs_ok &&
3636 readdir->common.err == nfserr_toosmall &&
3637 xdr->buf->len == starting_len + 8) {
3638 /* nothing encoded; which limit did we hit?: */
3639 if (maxcount - 16 < bytes_left)
3640 /* It was the fault of rd_maxcount: */
3641 nfserr = nfserr_toosmall;
3643 /* We ran out of buffer space: */
3644 nfserr = nfserr_resource;
3649 if (readdir->cookie_offset) {
3650 wire_offset = cpu_to_be64(offset);
3651 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3655 p = xdr_reserve_space(xdr, 8);
3660 *p++ = 0; /* no more entries */
3661 *p++ = htonl(readdir->common.err == nfserr_eof);
3665 xdr_truncate_encode(xdr, starting_len);
3670 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3672 struct xdr_stream *xdr = &resp->xdr;
3676 p = xdr_reserve_space(xdr, 20);
3678 return nfserr_resource;
3679 p = encode_cinfo(p, &remove->rm_cinfo);
3685 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3687 struct xdr_stream *xdr = &resp->xdr;
3691 p = xdr_reserve_space(xdr, 40);
3693 return nfserr_resource;
3694 p = encode_cinfo(p, &rename->rn_sinfo);
3695 p = encode_cinfo(p, &rename->rn_tinfo);
3701 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3702 __be32 nfserr, struct svc_export *exp)
3704 u32 i, nflavs, supported;
3705 struct exp_flavor_info *flavs;
3706 struct exp_flavor_info def_flavs[2];
3707 __be32 *p, *flavorsp;
3708 static bool report = true;
3712 nfserr = nfserr_resource;
3713 if (exp->ex_nflavors) {
3714 flavs = exp->ex_flavors;
3715 nflavs = exp->ex_nflavors;
3716 } else { /* Handling of some defaults in absence of real secinfo: */
3718 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3720 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3721 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3722 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3724 flavs[0].pseudoflavor
3725 = svcauth_gss_flavor(exp->ex_client);
3728 flavs[0].pseudoflavor
3729 = exp->ex_client->flavour->flavour;
3734 p = xdr_reserve_space(xdr, 4);
3737 flavorsp = p++; /* to be backfilled later */
3739 for (i = 0; i < nflavs; i++) {
3740 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3741 struct rpcsec_gss_info info;
3743 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3745 p = xdr_reserve_space(xdr, 4 + 4 +
3746 XDR_LEN(info.oid.len) + 4 + 4);
3749 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3750 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3751 *p++ = cpu_to_be32(info.qop);
3752 *p++ = cpu_to_be32(info.service);
3753 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3755 p = xdr_reserve_space(xdr, 4);
3758 *p++ = cpu_to_be32(pf);
3761 pr_warn("NFS: SECINFO: security flavor %u "
3762 "is not supported\n", pf);
3766 if (nflavs != supported)
3768 *flavorsp = htonl(supported);
3777 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3778 struct nfsd4_secinfo *secinfo)
3780 struct xdr_stream *xdr = &resp->xdr;
3782 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3786 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3787 struct nfsd4_secinfo_no_name *secinfo)
3789 struct xdr_stream *xdr = &resp->xdr;
3791 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3795 * The SETATTR encode routine is special -- it always encodes a bitmap,
3796 * regardless of the error status.
3799 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3801 struct xdr_stream *xdr = &resp->xdr;
3804 p = xdr_reserve_space(xdr, 16);
3806 return nfserr_resource;
3808 *p++ = cpu_to_be32(3);
3809 *p++ = cpu_to_be32(0);
3810 *p++ = cpu_to_be32(0);
3811 *p++ = cpu_to_be32(0);
3814 *p++ = cpu_to_be32(3);
3815 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3816 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3817 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3823 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3825 struct xdr_stream *xdr = &resp->xdr;
3829 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3831 return nfserr_resource;
3832 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3833 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3834 NFS4_VERIFIER_SIZE);
3836 else if (nfserr == nfserr_clid_inuse) {
3837 p = xdr_reserve_space(xdr, 8);
3839 return nfserr_resource;
3840 *p++ = cpu_to_be32(0);
3841 *p++ = cpu_to_be32(0);
3847 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3849 struct xdr_stream *xdr = &resp->xdr;
3853 p = xdr_reserve_space(xdr, 16);
3855 return nfserr_resource;
3856 *p++ = cpu_to_be32(write->wr_bytes_written);
3857 *p++ = cpu_to_be32(write->wr_how_written);
3858 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3859 NFS4_VERIFIER_SIZE);
3864 static const u32 nfs4_minimal_spo_must_enforce[2] = {
3865 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
3866 1 << (OP_EXCHANGE_ID - 32) |
3867 1 << (OP_CREATE_SESSION - 32) |
3868 1 << (OP_DESTROY_SESSION - 32) |
3869 1 << (OP_DESTROY_CLIENTID - 32)
3873 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3874 struct nfsd4_exchange_id *exid)
3876 struct xdr_stream *xdr = &resp->xdr;
3881 int server_scope_sz;
3882 uint64_t minor_id = 0;
3887 major_id = utsname()->nodename;
3888 major_id_sz = strlen(major_id);
3889 server_scope = utsname()->nodename;
3890 server_scope_sz = strlen(server_scope);
3892 p = xdr_reserve_space(xdr,
3893 8 /* eir_clientid */ +
3894 4 /* eir_sequenceid */ +
3898 return nfserr_resource;
3900 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3901 *p++ = cpu_to_be32(exid->seqid);
3902 *p++ = cpu_to_be32(exid->flags);
3904 *p++ = cpu_to_be32(exid->spa_how);
3906 switch (exid->spa_how) {
3910 /* spo_must_enforce, spo_must_allow */
3911 p = xdr_reserve_space(xdr, 16);
3913 return nfserr_resource;
3915 /* spo_must_enforce bitmap: */
3916 *p++ = cpu_to_be32(2);
3917 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]);
3918 *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]);
3919 /* empty spo_must_allow bitmap: */
3920 *p++ = cpu_to_be32(0);
3927 p = xdr_reserve_space(xdr,
3928 8 /* so_minor_id */ +
3929 4 /* so_major_id.len */ +
3930 (XDR_QUADLEN(major_id_sz) * 4) +
3931 4 /* eir_server_scope.len */ +
3932 (XDR_QUADLEN(server_scope_sz) * 4) +
3933 4 /* eir_server_impl_id.count (0) */);
3935 return nfserr_resource;
3937 /* The server_owner struct */
3938 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3940 p = xdr_encode_opaque(p, major_id, major_id_sz);
3943 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3945 /* Implementation id */
3946 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3951 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3952 struct nfsd4_create_session *sess)
3954 struct xdr_stream *xdr = &resp->xdr;
3960 p = xdr_reserve_space(xdr, 24);
3962 return nfserr_resource;
3963 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3964 NFS4_MAX_SESSIONID_LEN);
3965 *p++ = cpu_to_be32(sess->seqid);
3966 *p++ = cpu_to_be32(sess->flags);
3968 p = xdr_reserve_space(xdr, 28);
3970 return nfserr_resource;
3971 *p++ = cpu_to_be32(0); /* headerpadsz */
3972 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3973 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3974 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3975 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3976 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3977 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3979 if (sess->fore_channel.nr_rdma_attrs) {
3980 p = xdr_reserve_space(xdr, 4);
3982 return nfserr_resource;
3983 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3986 p = xdr_reserve_space(xdr, 28);
3988 return nfserr_resource;
3989 *p++ = cpu_to_be32(0); /* headerpadsz */
3990 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3991 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3992 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3993 *p++ = cpu_to_be32(sess->back_channel.maxops);
3994 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3995 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3997 if (sess->back_channel.nr_rdma_attrs) {
3998 p = xdr_reserve_space(xdr, 4);
4000 return nfserr_resource;
4001 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4007 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4008 struct nfsd4_sequence *seq)
4010 struct xdr_stream *xdr = &resp->xdr;
4016 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4018 return nfserr_resource;
4019 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4020 NFS4_MAX_SESSIONID_LEN);
4021 *p++ = cpu_to_be32(seq->seqid);
4022 *p++ = cpu_to_be32(seq->slotid);
4023 /* Note slotid's are numbered from zero: */
4024 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4025 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4026 *p++ = cpu_to_be32(seq->status_flags);
4028 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4033 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4034 struct nfsd4_test_stateid *test_stateid)
4036 struct xdr_stream *xdr = &resp->xdr;
4037 struct nfsd4_test_stateid_id *stateid, *next;
4043 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4045 return nfserr_resource;
4046 *p++ = htonl(test_stateid->ts_num_ids);
4048 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4049 *p++ = stateid->ts_id_status;
4055 #ifdef CONFIG_NFSD_PNFS
4057 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4058 struct nfsd4_getdeviceinfo *gdev)
4060 struct xdr_stream *xdr = &resp->xdr;
4061 const struct nfsd4_layout_ops *ops =
4062 nfsd4_layout_ops[gdev->gd_layout_type];
4063 u32 starting_len = xdr->buf->len, needed_len;
4066 dprintk("%s: err %d\n", __func__, nfserr);
4070 nfserr = nfserr_resource;
4071 p = xdr_reserve_space(xdr, 4);
4075 *p++ = cpu_to_be32(gdev->gd_layout_type);
4077 /* If maxcount is 0 then just update notifications */
4078 if (gdev->gd_maxcount != 0) {
4079 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4082 * We don't bother to burden the layout drivers with
4083 * enforcing gd_maxcount, just tell the client to
4084 * come back with a bigger buffer if it's not enough.
4086 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4092 nfserr = nfserr_resource;
4093 if (gdev->gd_notify_types) {
4094 p = xdr_reserve_space(xdr, 4 + 4);
4097 *p++ = cpu_to_be32(1); /* bitmap length */
4098 *p++ = cpu_to_be32(gdev->gd_notify_types);
4100 p = xdr_reserve_space(xdr, 4);
4108 kfree(gdev->gd_device);
4109 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4113 dprintk("%s: maxcount too small\n", __func__);
4114 needed_len = xdr->buf->len + 4 /* notifications */;
4115 xdr_truncate_encode(xdr, starting_len);
4116 p = xdr_reserve_space(xdr, 4);
4118 nfserr = nfserr_resource;
4120 *p++ = cpu_to_be32(needed_len);
4121 nfserr = nfserr_toosmall;
4127 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4128 struct nfsd4_layoutget *lgp)
4130 struct xdr_stream *xdr = &resp->xdr;
4131 const struct nfsd4_layout_ops *ops =
4132 nfsd4_layout_ops[lgp->lg_layout_type];
4135 dprintk("%s: err %d\n", __func__, nfserr);
4139 nfserr = nfserr_resource;
4140 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4144 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4145 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4146 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4147 sizeof(stateid_opaque_t));
4149 *p++ = cpu_to_be32(1); /* we always return a single layout */
4150 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4151 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4152 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4153 *p++ = cpu_to_be32(lgp->lg_layout_type);
4155 nfserr = ops->encode_layoutget(xdr, lgp);
4157 kfree(lgp->lg_content);
4162 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4163 struct nfsd4_layoutcommit *lcp)
4165 struct xdr_stream *xdr = &resp->xdr;
4171 p = xdr_reserve_space(xdr, 4);
4173 return nfserr_resource;
4174 *p++ = cpu_to_be32(lcp->lc_size_chg);
4175 if (lcp->lc_size_chg) {
4176 p = xdr_reserve_space(xdr, 8);
4178 return nfserr_resource;
4179 p = xdr_encode_hyper(p, lcp->lc_newsize);
4186 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4187 struct nfsd4_layoutreturn *lrp)
4189 struct xdr_stream *xdr = &resp->xdr;
4195 p = xdr_reserve_space(xdr, 4);
4197 return nfserr_resource;
4198 *p++ = cpu_to_be32(lrp->lrs_present);
4199 if (lrp->lrs_present)
4200 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4203 #endif /* CONFIG_NFSD_PNFS */
4206 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4207 struct nfsd4_seek *seek)
4214 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4215 *p++ = cpu_to_be32(seek->seek_eof);
4216 p = xdr_encode_hyper(p, seek->seek_pos);
4222 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4227 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4230 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4231 * since we don't need to filter out obsolete ops as this is
4232 * done in the decoding phase.
4234 static nfsd4_enc nfsd4_enc_ops[] = {
4235 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4236 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4237 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4238 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4239 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4240 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4241 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4242 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4243 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4244 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4245 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4246 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4247 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4248 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4249 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4250 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4251 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4252 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4253 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4254 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4255 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4256 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4257 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4258 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4259 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4260 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4261 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4262 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4264 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4265 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4266 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4267 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4268 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4269 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4270 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4271 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4273 /* NFSv4.1 operations */
4274 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4275 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4276 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4277 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4278 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4279 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4280 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4281 #ifdef CONFIG_NFSD_PNFS
4282 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4283 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4284 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4285 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4286 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4288 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4289 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4290 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4291 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4292 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4294 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4295 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4296 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4297 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4298 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4299 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4300 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4302 /* NFSv4.2 operations */
4303 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4304 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
4305 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4307 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4308 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4309 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4310 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4311 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4312 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4313 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4314 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4315 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4319 * Calculate whether we still have space to encode repsize bytes.
4320 * There are two considerations:
4321 * - For NFS versions >=4.1, the size of the reply must stay within
4323 * - For all NFS versions, we must stay within limited preallocated
4326 * This is called before the operation is processed, so can only provide
4327 * an upper estimate. For some nonidempotent operations (such as
4328 * getattr), it's not necessarily a problem if that estimate is wrong,
4329 * as we can fail it after processing without significant side effects.
4331 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4333 struct xdr_buf *buf = &resp->rqstp->rq_res;
4334 struct nfsd4_slot *slot = resp->cstate.slot;
4336 if (buf->len + respsize <= buf->buflen)
4338 if (!nfsd4_has_session(&resp->cstate))
4339 return nfserr_resource;
4340 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4342 return nfserr_rep_too_big_to_cache;
4344 return nfserr_rep_too_big;
4348 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4350 struct xdr_stream *xdr = &resp->xdr;
4351 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4352 struct svc_rqst *rqstp = resp->rqstp;
4353 int post_err_offset;
4357 p = xdr_reserve_space(xdr, 8);
4362 *p++ = cpu_to_be32(op->opnum);
4363 post_err_offset = xdr->buf->len;
4365 if (op->opnum == OP_ILLEGAL)
4367 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4368 !nfsd4_enc_ops[op->opnum]);
4369 encoder = nfsd4_enc_ops[op->opnum];
4370 op->status = encoder(resp, op->status, &op->u);
4371 xdr_commit_encode(xdr);
4373 /* nfsd4_check_resp_size guarantees enough room for error status */
4375 int space_needed = 0;
4376 if (!nfsd4_last_compound_op(rqstp))
4377 space_needed = COMPOUND_ERR_SLACK_SPACE;
4378 op->status = nfsd4_check_resp_size(resp, space_needed);
4380 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4381 struct nfsd4_slot *slot = resp->cstate.slot;
4383 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4384 op->status = nfserr_rep_too_big_to_cache;
4386 op->status = nfserr_rep_too_big;
4388 if (op->status == nfserr_resource ||
4389 op->status == nfserr_rep_too_big ||
4390 op->status == nfserr_rep_too_big_to_cache) {
4392 * The operation may have already been encoded or
4393 * partially encoded. No op returns anything additional
4394 * in the case of one of these three errors, so we can
4395 * just truncate back to after the status. But it's a
4396 * bug if we had to do this on a non-idempotent op:
4398 warn_on_nonidempotent_op(op);
4399 xdr_truncate_encode(xdr, post_err_offset);
4402 int len = xdr->buf->len - post_err_offset;
4404 so->so_replay.rp_status = op->status;
4405 so->so_replay.rp_buflen = len;
4406 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4407 so->so_replay.rp_buf, len);
4410 /* Note that op->status is already in network byte order: */
4411 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4415 * Encode the reply stored in the stateowner reply cache
4417 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4418 * previously sent already encoded operation.
4421 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4424 struct nfs4_replay *rp = op->replay;
4428 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4433 *p++ = cpu_to_be32(op->opnum);
4434 *p++ = rp->rp_status; /* already xdr'ed */
4436 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4440 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4442 return xdr_ressize_check(rqstp, p);
4445 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4447 struct svc_rqst *rqstp = rq;
4448 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4450 if (args->ops != args->iops) {
4452 args->ops = args->iops;
4456 while (args->to_free) {
4457 struct svcxdr_tmpbuf *tb = args->to_free;
4458 args->to_free = tb->next;
4465 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4467 if (rqstp->rq_arg.head[0].iov_len % 4) {
4468 /* client is nuts */
4469 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4470 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4474 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4475 args->pagelist = rqstp->rq_arg.pages;
4476 args->pagelen = rqstp->rq_arg.page_len;
4478 args->to_free = NULL;
4479 args->ops = args->iops;
4480 args->rqstp = rqstp;
4482 return !nfsd4_decode_compound(args);
4486 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4489 * All that remains is to write the tag and operation count...
4491 struct xdr_buf *buf = resp->xdr.buf;
4493 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4494 buf->tail[0].iov_len);
4496 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4499 *p++ = htonl(resp->taglen);
4500 memcpy(p, resp->tag, resp->taglen);
4501 p += XDR_QUADLEN(resp->taglen);
4502 *p++ = htonl(resp->opcnt);
4504 nfsd4_sequence_done(resp);