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);
1076 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1078 rename->rn_tnamelen = be32_to_cpup(p++);
1079 READ_BUF(rename->rn_tnamelen);
1080 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1081 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1083 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1090 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1094 if (argp->minorversion >= 1)
1095 return nfserr_notsupp;
1097 READ_BUF(sizeof(clientid_t));
1098 COPYMEM(clientid, sizeof(clientid_t));
1104 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1105 struct nfsd4_secinfo *secinfo)
1110 secinfo->si_namelen = be32_to_cpup(p++);
1111 READ_BUF(secinfo->si_namelen);
1112 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1113 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1120 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1121 struct nfsd4_secinfo_no_name *sin)
1126 sin->sin_style = be32_to_cpup(p++);
1131 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1135 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1138 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1139 &setattr->sa_acl, &setattr->sa_label);
1143 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1147 if (argp->minorversion >= 1)
1148 return nfserr_notsupp;
1150 READ_BUF(NFS4_VERIFIER_SIZE);
1151 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1153 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1155 return nfserr_bad_xdr;
1157 setclientid->se_callback_prog = be32_to_cpup(p++);
1158 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1159 READ_BUF(setclientid->se_callback_netid_len);
1160 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1162 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1164 READ_BUF(setclientid->se_callback_addr_len);
1165 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1167 setclientid->se_callback_ident = be32_to_cpup(p++);
1173 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1177 if (argp->minorversion >= 1)
1178 return nfserr_notsupp;
1180 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1181 COPYMEM(&scd_c->sc_clientid, 8);
1182 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1187 /* Also used for NVERIFY */
1189 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1193 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1196 /* For convenience's sake, we compare raw xdr'd attributes in
1197 * nfsd4_proc_verify */
1200 verify->ve_attrlen = be32_to_cpup(p++);
1201 READ_BUF(verify->ve_attrlen);
1202 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1208 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1214 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1218 p = xdr_decode_hyper(p, &write->wr_offset);
1219 write->wr_stable_how = be32_to_cpup(p++);
1220 if (write->wr_stable_how > 2)
1222 write->wr_buflen = be32_to_cpup(p++);
1224 /* Sorry .. no magic macros for this.. *
1225 * READ_BUF(write->wr_buflen);
1226 * SAVEMEM(write->wr_buf, write->wr_buflen);
1228 avail = (char*)argp->end - (char*)argp->p;
1229 if (avail + argp->pagelen < write->wr_buflen) {
1230 dprintk("NFSD: xdr error (%s:%d)\n",
1231 __FILE__, __LINE__);
1234 write->wr_head.iov_base = p;
1235 write->wr_head.iov_len = avail;
1236 write->wr_pagelist = argp->pagelist;
1238 len = XDR_QUADLEN(write->wr_buflen) << 2;
1244 pages = len >> PAGE_SHIFT;
1245 argp->pagelist += pages;
1246 argp->pagelen -= pages * PAGE_SIZE;
1247 len -= pages * PAGE_SIZE;
1249 argp->p = (__be32 *)page_address(argp->pagelist[0]);
1251 argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE);
1253 argp->p += XDR_QUADLEN(len);
1259 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1263 if (argp->minorversion >= 1)
1264 return nfserr_notsupp;
1267 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1268 rlockowner->rl_owner.len = be32_to_cpup(p++);
1269 READ_BUF(rlockowner->rl_owner.len);
1270 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1272 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1273 return nfserr_inval;
1278 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1279 struct nfsd4_exchange_id *exid)
1284 READ_BUF(NFS4_VERIFIER_SIZE);
1285 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1287 status = nfsd4_decode_opaque(argp, &exid->clname);
1289 return nfserr_bad_xdr;
1292 exid->flags = be32_to_cpup(p++);
1294 /* Ignore state_protect4_a */
1296 exid->spa_how = be32_to_cpup(p++);
1297 switch (exid->spa_how) {
1301 /* spo_must_enforce */
1302 status = nfsd4_decode_bitmap(argp,
1303 exid->spo_must_enforce);
1306 /* spo_must_allow */
1307 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
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);
1839 SAVEMEM(argp->tag, argp->taglen);
1841 argp->minorversion = be32_to_cpup(p++);
1842 argp->opcnt = be32_to_cpup(p++);
1843 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
1845 if (argp->taglen > NFSD4_MAX_TAGLEN)
1847 if (argp->opcnt > 100)
1850 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1851 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1853 argp->ops = argp->iops;
1854 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1859 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
1862 for (i = 0; i < argp->opcnt; i++) {
1867 op->opnum = be32_to_cpup(p++);
1869 if (nfsd4_opnum_in_range(argp, op))
1870 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
1872 op->opnum = OP_ILLEGAL;
1873 op->status = nfserr_op_illegal;
1876 * We'll try to cache the result in the DRC if any one
1877 * op in the compound wants to be cached:
1879 cachethis |= nfsd4_cache_this_op(op);
1881 if (op->opnum == OP_READ) {
1883 readbytes += nfsd4_max_reply(argp->rqstp, op);
1885 max_reply += nfsd4_max_reply(argp->rqstp, op);
1887 * OP_LOCK may return a conflicting lock. (Special case
1888 * because it will just skip encoding this if it runs
1889 * out of xdr buffer space, and it is the only operation
1890 * that behaves this way.)
1892 if (op->opnum == OP_LOCK)
1893 max_reply += NFS4_OPAQUE_LIMIT;
1900 /* Sessions make the DRC unnecessary: */
1901 if (argp->minorversion)
1903 svc_reserve(argp->rqstp, max_reply + readbytes);
1904 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1906 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
1907 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
1912 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
1914 if (IS_I_VERSION(inode)) {
1915 p = xdr_encode_hyper(p, inode->i_version);
1917 *p++ = cpu_to_be32(stat->ctime.tv_sec);
1918 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
1923 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
1925 *p++ = cpu_to_be32(c->atomic);
1926 if (c->change_supported) {
1927 p = xdr_encode_hyper(p, c->before_change);
1928 p = xdr_encode_hyper(p, c->after_change);
1930 *p++ = cpu_to_be32(c->before_ctime_sec);
1931 *p++ = cpu_to_be32(c->before_ctime_nsec);
1932 *p++ = cpu_to_be32(c->after_ctime_sec);
1933 *p++ = cpu_to_be32(c->after_ctime_nsec);
1938 /* Encode as an array of strings the string given with components
1939 * separated @sep, escaped with esc_enter and esc_exit.
1941 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
1942 char *components, char esc_enter,
1948 int strlen, count=0;
1949 char *str, *end, *next;
1951 dprintk("nfsd4_encode_components(%s)\n", components);
1953 pathlen_offset = xdr->buf->len;
1954 p = xdr_reserve_space(xdr, 4);
1956 return nfserr_resource;
1957 p++; /* We will fill this in with @count later */
1959 end = str = components;
1961 bool found_esc = false;
1963 /* try to parse as esc_start, ..., esc_end, sep */
1964 if (*str == esc_enter) {
1965 for (; *end && (*end != esc_exit); end++)
1966 /* find esc_exit or end of string */;
1968 if (*end && (!*next || *next == sep)) {
1975 for (; *end && (*end != sep); end++)
1976 /* find sep or end of string */;
1980 p = xdr_reserve_space(xdr, strlen + 4);
1982 return nfserr_resource;
1983 p = xdr_encode_opaque(p, str, strlen);
1993 pathlen = htonl(count);
1994 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
1998 /* Encode as an array of strings the string given with components
2001 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2004 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2008 * encode a location element of a fs_locations structure
2010 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2011 struct nfsd4_fs_location *location)
2015 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2019 status = nfsd4_encode_components(xdr, '/', location->path);
2026 * Encode a path in RFC3530 'pathname4' format
2028 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2029 const struct path *root,
2030 const struct path *path)
2032 struct path cur = *path;
2034 struct dentry **components = NULL;
2035 unsigned int ncomponents = 0;
2036 __be32 err = nfserr_jukebox;
2038 dprintk("nfsd4_encode_components(");
2041 /* First walk the path up to the nfsd root, and store the
2042 * dentries/path components in an array.
2045 if (path_equal(&cur, root))
2047 if (cur.dentry == cur.mnt->mnt_root) {
2048 if (follow_up(&cur))
2052 if ((ncomponents & 15) == 0) {
2053 struct dentry **new;
2054 new = krealloc(components,
2055 sizeof(*new) * (ncomponents + 16),
2061 components[ncomponents++] = cur.dentry;
2062 cur.dentry = dget_parent(cur.dentry);
2064 err = nfserr_resource;
2065 p = xdr_reserve_space(xdr, 4);
2068 *p++ = cpu_to_be32(ncomponents);
2070 while (ncomponents) {
2071 struct dentry *dentry = components[ncomponents - 1];
2074 spin_lock(&dentry->d_lock);
2075 len = dentry->d_name.len;
2076 p = xdr_reserve_space(xdr, len + 4);
2078 spin_unlock(&dentry->d_lock);
2081 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2082 dprintk("/%pd", dentry);
2083 spin_unlock(&dentry->d_lock);
2092 dput(components[--ncomponents]);
2098 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2099 struct svc_rqst *rqstp, const struct path *path)
2101 struct svc_export *exp_ps;
2104 exp_ps = rqst_find_fsidzero_export(rqstp);
2106 return nfserrno(PTR_ERR(exp_ps));
2107 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2113 * encode a fs_locations structure
2115 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2116 struct svc_rqst *rqstp, struct svc_export *exp)
2121 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2123 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2126 p = xdr_reserve_space(xdr, 4);
2128 return nfserr_resource;
2129 *p++ = cpu_to_be32(fslocs->locations_count);
2130 for (i=0; i<fslocs->locations_count; i++) {
2131 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2138 static u32 nfs4_file_type(umode_t mode)
2140 switch (mode & S_IFMT) {
2141 case S_IFIFO: return NF4FIFO;
2142 case S_IFCHR: return NF4CHR;
2143 case S_IFDIR: return NF4DIR;
2144 case S_IFBLK: return NF4BLK;
2145 case S_IFLNK: return NF4LNK;
2146 case S_IFREG: return NF4REG;
2147 case S_IFSOCK: return NF4SOCK;
2148 default: return NF4BAD;
2152 static inline __be32
2153 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2154 struct nfs4_ace *ace)
2156 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2157 return nfs4_acl_write_who(xdr, ace->whotype);
2158 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2159 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2161 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2164 static inline __be32
2165 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2168 unsigned long i = hweight_long(layout_types);
2170 p = xdr_reserve_space(xdr, 4 + 4 * i);
2172 return nfserr_resource;
2174 *p++ = cpu_to_be32(i);
2176 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2177 if (layout_types & (1 << i))
2178 *p++ = cpu_to_be32(i);
2183 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2184 FATTR4_WORD0_RDATTR_ERROR)
2185 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2186 #define WORD2_ABSENT_FS_ATTRS 0
2188 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2189 static inline __be32
2190 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2191 void *context, int len)
2195 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2197 return nfserr_resource;
2200 * For now we use a 0 here to indicate the null translation; in
2201 * the future we may place a call to translation code here.
2203 *p++ = cpu_to_be32(0); /* lfs */
2204 *p++ = cpu_to_be32(0); /* pi */
2205 p = xdr_encode_opaque(p, context, len);
2209 static inline __be32
2210 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2211 void *context, int len)
2215 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2217 /* As per referral draft: */
2218 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2219 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2220 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2221 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2222 *rdattr_err = NFSERR_MOVED;
2224 return nfserr_moved;
2226 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2227 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2228 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2233 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2235 struct path path = exp->ex_path;
2239 while (follow_up(&path)) {
2240 if (path.dentry != path.mnt->mnt_root)
2243 err = vfs_getattr(&path, stat);
2249 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2254 p = xdr_reserve_space(xdr, 16);
2257 *p++ = cpu_to_be32(3);
2258 *p++ = cpu_to_be32(bmval0);
2259 *p++ = cpu_to_be32(bmval1);
2260 *p++ = cpu_to_be32(bmval2);
2261 } else if (bmval1) {
2262 p = xdr_reserve_space(xdr, 12);
2265 *p++ = cpu_to_be32(2);
2266 *p++ = cpu_to_be32(bmval0);
2267 *p++ = cpu_to_be32(bmval1);
2269 p = xdr_reserve_space(xdr, 8);
2272 *p++ = cpu_to_be32(1);
2273 *p++ = cpu_to_be32(bmval0);
2278 return nfserr_resource;
2282 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2286 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2287 struct svc_export *exp,
2288 struct dentry *dentry, u32 *bmval,
2289 struct svc_rqst *rqstp, int ignore_crossmnt)
2291 u32 bmval0 = bmval[0];
2292 u32 bmval1 = bmval[1];
2293 u32 bmval2 = bmval[2];
2295 struct svc_fh *tempfh = NULL;
2296 struct kstatfs statfs;
2298 int starting_len = xdr->buf->len;
2306 struct nfs4_acl *acl = NULL;
2307 void *context = NULL;
2309 bool contextsupport = false;
2310 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2311 u32 minorversion = resp->cstate.minorversion;
2312 struct path path = {
2313 .mnt = exp->ex_path.mnt,
2316 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2318 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2319 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2320 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2321 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2323 if (exp->ex_fslocs.migrated) {
2324 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2329 err = vfs_getattr(&path, &stat);
2332 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2333 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2334 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2335 FATTR4_WORD1_SPACE_TOTAL))) {
2336 err = vfs_statfs(&path, &statfs);
2340 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2341 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2342 status = nfserr_jukebox;
2345 fh_init(tempfh, NFS4_FHSIZE);
2346 status = fh_compose(tempfh, exp, dentry, NULL);
2351 if (bmval0 & FATTR4_WORD0_ACL) {
2352 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2353 if (err == -EOPNOTSUPP)
2354 bmval0 &= ~FATTR4_WORD0_ACL;
2355 else if (err == -EINVAL) {
2356 status = nfserr_attrnotsupp;
2358 } else if (err != 0)
2362 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2363 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2364 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2365 err = security_inode_getsecctx(d_inode(dentry),
2366 &context, &contextlen);
2367 contextsupport = (err == 0);
2368 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2369 if (err == -EOPNOTSUPP)
2370 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2375 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2377 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2381 attrlen_offset = xdr->buf->len;
2382 p = xdr_reserve_space(xdr, 4);
2385 p++; /* to be backfilled later */
2387 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2388 u32 word0 = nfsd_suppattrs0(minorversion);
2389 u32 word1 = nfsd_suppattrs1(minorversion);
2390 u32 word2 = nfsd_suppattrs2(minorversion);
2392 if (!IS_POSIXACL(dentry->d_inode))
2393 word0 &= ~FATTR4_WORD0_ACL;
2394 if (!contextsupport)
2395 word2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2397 p = xdr_reserve_space(xdr, 12);
2400 *p++ = cpu_to_be32(2);
2401 *p++ = cpu_to_be32(word0);
2402 *p++ = cpu_to_be32(word1);
2404 p = xdr_reserve_space(xdr, 16);
2407 *p++ = cpu_to_be32(3);
2408 *p++ = cpu_to_be32(word0);
2409 *p++ = cpu_to_be32(word1);
2410 *p++ = cpu_to_be32(word2);
2413 if (bmval0 & FATTR4_WORD0_TYPE) {
2414 p = xdr_reserve_space(xdr, 4);
2417 dummy = nfs4_file_type(stat.mode);
2418 if (dummy == NF4BAD) {
2419 status = nfserr_serverfault;
2422 *p++ = cpu_to_be32(dummy);
2424 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2425 p = xdr_reserve_space(xdr, 4);
2428 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2429 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2431 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2432 NFS4_FH_VOL_RENAME);
2434 if (bmval0 & FATTR4_WORD0_CHANGE) {
2435 p = xdr_reserve_space(xdr, 8);
2438 p = encode_change(p, &stat, d_inode(dentry));
2440 if (bmval0 & FATTR4_WORD0_SIZE) {
2441 p = xdr_reserve_space(xdr, 8);
2444 p = xdr_encode_hyper(p, stat.size);
2446 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2447 p = xdr_reserve_space(xdr, 4);
2450 *p++ = cpu_to_be32(1);
2452 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2453 p = xdr_reserve_space(xdr, 4);
2456 *p++ = cpu_to_be32(1);
2458 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2459 p = xdr_reserve_space(xdr, 4);
2462 *p++ = cpu_to_be32(0);
2464 if (bmval0 & FATTR4_WORD0_FSID) {
2465 p = xdr_reserve_space(xdr, 16);
2468 if (exp->ex_fslocs.migrated) {
2469 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2470 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2471 } else switch(fsid_source(fhp)) {
2472 case FSIDSOURCE_FSID:
2473 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2474 p = xdr_encode_hyper(p, (u64)0);
2476 case FSIDSOURCE_DEV:
2477 *p++ = cpu_to_be32(0);
2478 *p++ = cpu_to_be32(MAJOR(stat.dev));
2479 *p++ = cpu_to_be32(0);
2480 *p++ = cpu_to_be32(MINOR(stat.dev));
2482 case FSIDSOURCE_UUID:
2483 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2488 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2489 p = xdr_reserve_space(xdr, 4);
2492 *p++ = cpu_to_be32(0);
2494 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2495 p = xdr_reserve_space(xdr, 4);
2498 *p++ = cpu_to_be32(nn->nfsd4_lease);
2500 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2501 p = xdr_reserve_space(xdr, 4);
2504 *p++ = cpu_to_be32(rdattr_err);
2506 if (bmval0 & FATTR4_WORD0_ACL) {
2507 struct nfs4_ace *ace;
2510 p = xdr_reserve_space(xdr, 4);
2514 *p++ = cpu_to_be32(0);
2517 p = xdr_reserve_space(xdr, 4);
2520 *p++ = cpu_to_be32(acl->naces);
2522 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2523 p = xdr_reserve_space(xdr, 4*3);
2526 *p++ = cpu_to_be32(ace->type);
2527 *p++ = cpu_to_be32(ace->flag);
2528 *p++ = cpu_to_be32(ace->access_mask &
2530 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2536 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2537 p = xdr_reserve_space(xdr, 4);
2540 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2541 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2543 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2544 p = xdr_reserve_space(xdr, 4);
2547 *p++ = cpu_to_be32(1);
2549 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2550 p = xdr_reserve_space(xdr, 4);
2553 *p++ = cpu_to_be32(0);
2555 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2556 p = xdr_reserve_space(xdr, 4);
2559 *p++ = cpu_to_be32(1);
2561 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2562 p = xdr_reserve_space(xdr, 4);
2565 *p++ = cpu_to_be32(1);
2567 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2568 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2571 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2572 fhp->fh_handle.fh_size);
2574 if (bmval0 & FATTR4_WORD0_FILEID) {
2575 p = xdr_reserve_space(xdr, 8);
2578 p = xdr_encode_hyper(p, stat.ino);
2580 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2581 p = xdr_reserve_space(xdr, 8);
2584 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2586 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2587 p = xdr_reserve_space(xdr, 8);
2590 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
2592 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2593 p = xdr_reserve_space(xdr, 8);
2596 p = xdr_encode_hyper(p, (u64) statfs.f_files);
2598 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2599 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
2603 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2604 p = xdr_reserve_space(xdr, 4);
2607 *p++ = cpu_to_be32(1);
2609 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2610 p = xdr_reserve_space(xdr, 8);
2613 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
2615 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2616 p = xdr_reserve_space(xdr, 4);
2619 *p++ = cpu_to_be32(255);
2621 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2622 p = xdr_reserve_space(xdr, 4);
2625 *p++ = cpu_to_be32(statfs.f_namelen);
2627 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2628 p = xdr_reserve_space(xdr, 8);
2631 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2633 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2634 p = xdr_reserve_space(xdr, 8);
2637 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
2639 if (bmval1 & FATTR4_WORD1_MODE) {
2640 p = xdr_reserve_space(xdr, 4);
2643 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
2645 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2646 p = xdr_reserve_space(xdr, 4);
2649 *p++ = cpu_to_be32(1);
2651 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2652 p = xdr_reserve_space(xdr, 4);
2655 *p++ = cpu_to_be32(stat.nlink);
2657 if (bmval1 & FATTR4_WORD1_OWNER) {
2658 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
2662 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2663 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
2667 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2668 p = xdr_reserve_space(xdr, 8);
2671 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
2672 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
2674 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2675 p = xdr_reserve_space(xdr, 8);
2678 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2679 p = xdr_encode_hyper(p, dummy64);
2681 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2682 p = xdr_reserve_space(xdr, 8);
2685 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2686 p = xdr_encode_hyper(p, dummy64);
2688 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2689 p = xdr_reserve_space(xdr, 8);
2692 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2693 p = xdr_encode_hyper(p, dummy64);
2695 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2696 p = xdr_reserve_space(xdr, 8);
2699 dummy64 = (u64)stat.blocks << 9;
2700 p = xdr_encode_hyper(p, dummy64);
2702 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2703 p = xdr_reserve_space(xdr, 12);
2706 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
2707 *p++ = cpu_to_be32(stat.atime.tv_nsec);
2709 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2710 p = xdr_reserve_space(xdr, 12);
2713 *p++ = cpu_to_be32(0);
2714 *p++ = cpu_to_be32(1);
2715 *p++ = cpu_to_be32(0);
2717 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2718 p = xdr_reserve_space(xdr, 12);
2721 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
2722 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
2724 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2725 p = xdr_reserve_space(xdr, 12);
2728 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
2729 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
2731 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2732 struct kstat parent_stat;
2735 p = xdr_reserve_space(xdr, 8);
2739 * Get parent's attributes if not ignoring crossmount
2740 * and this is the root of a cross-mounted filesystem.
2742 if (ignore_crossmnt == 0 &&
2743 dentry == exp->ex_path.mnt->mnt_root) {
2744 err = get_parent_attributes(exp, &parent_stat);
2747 ino = parent_stat.ino;
2749 p = xdr_encode_hyper(p, ino);
2751 #ifdef CONFIG_NFSD_PNFS
2752 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
2753 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2758 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
2759 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
2764 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
2765 p = xdr_reserve_space(xdr, 4);
2768 *p++ = cpu_to_be32(stat.blksize);
2770 #endif /* CONFIG_NFSD_PNFS */
2771 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2772 status = nfsd4_encode_bitmap(xdr, NFSD_SUPPATTR_EXCLCREAT_WORD0,
2773 NFSD_SUPPATTR_EXCLCREAT_WORD1,
2774 NFSD_SUPPATTR_EXCLCREAT_WORD2);
2779 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2780 status = nfsd4_encode_security_label(xdr, rqstp, context,
2786 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
2787 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
2791 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2793 security_release_secctx(context, contextlen);
2794 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2801 xdr_truncate_encode(xdr, starting_len);
2804 status = nfserrno(err);
2807 status = nfserr_resource;
2811 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
2812 struct xdr_buf *buf, __be32 *p, int bytes)
2814 xdr->scratch.iov_len = 0;
2815 memset(buf, 0, sizeof(struct xdr_buf));
2816 buf->head[0].iov_base = p;
2817 buf->head[0].iov_len = 0;
2820 xdr->iov = buf->head;
2822 xdr->end = (void *)p + bytes;
2823 buf->buflen = bytes;
2826 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
2827 struct svc_fh *fhp, struct svc_export *exp,
2828 struct dentry *dentry, u32 *bmval,
2829 struct svc_rqst *rqstp, int ignore_crossmnt)
2831 struct xdr_buf dummy;
2832 struct xdr_stream xdr;
2835 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
2836 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
2842 static inline int attributes_need_mount(u32 *bmval)
2844 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2846 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2852 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
2853 const char *name, int namlen)
2855 struct svc_export *exp = cd->rd_fhp->fh_export;
2856 struct dentry *dentry;
2858 int ignore_crossmnt = 0;
2860 dentry = lookup_one_len_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
2862 return nfserrno(PTR_ERR(dentry));
2863 if (d_really_is_negative(dentry)) {
2865 * we're not holding the i_mutex here, so there's
2866 * a window where this directory entry could have gone
2870 return nfserr_noent;
2875 * In the case of a mountpoint, the client may be asking for
2876 * attributes that are only properties of the underlying filesystem
2877 * as opposed to the cross-mounted file system. In such a case,
2878 * we will not follow the cross mount and will fill the attribtutes
2879 * directly from the mountpoint dentry.
2881 if (nfsd_mountpoint(dentry, exp)) {
2884 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2885 && !attributes_need_mount(cd->rd_bmval)) {
2886 ignore_crossmnt = 1;
2890 * Why the heck aren't we just using nfsd_lookup??
2891 * Different "."/".." handling? Something else?
2892 * At least, add a comment here to explain....
2894 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2896 nfserr = nfserrno(err);
2899 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2905 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
2906 cd->rd_rqstp, ignore_crossmnt);
2914 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
2918 p = xdr_reserve_space(xdr, 20);
2922 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2923 *p++ = htonl(0); /* bmval1 */
2925 *p++ = htonl(4); /* attribute length */
2926 *p++ = nfserr; /* no htonl */
2931 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2932 loff_t offset, u64 ino, unsigned int d_type)
2934 struct readdir_cd *ccd = ccdv;
2935 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2936 struct xdr_stream *xdr = cd->xdr;
2937 int start_offset = xdr->buf->len;
2939 u32 name_and_cookie;
2941 __be32 nfserr = nfserr_toosmall;
2945 /* In nfsv4, "." and ".." never make it onto the wire.. */
2946 if (name && isdotent(name, namlen)) {
2947 cd->common.err = nfs_ok;
2951 if (cd->cookie_offset) {
2952 wire_offset = cpu_to_be64(offset);
2953 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
2957 p = xdr_reserve_space(xdr, 4);
2960 *p++ = xdr_one; /* mark entry present */
2961 cookie_offset = xdr->buf->len;
2962 p = xdr_reserve_space(xdr, 3*4 + namlen);
2965 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2966 p = xdr_encode_array(p, name, namlen); /* name length & name */
2968 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
2972 case nfserr_resource:
2973 nfserr = nfserr_toosmall;
2976 xdr_truncate_encode(xdr, start_offset);
2980 * If the client requested the RDATTR_ERROR attribute,
2981 * we stuff the error code into this attribute
2982 * and continue. If this attribute was not requested,
2983 * then in accordance with the spec, we fail the
2984 * entire READDIR operation(!)
2986 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2988 p = nfsd4_encode_rdattr_error(xdr, nfserr);
2990 nfserr = nfserr_toosmall;
2994 nfserr = nfserr_toosmall;
2995 entry_bytes = xdr->buf->len - start_offset;
2996 if (entry_bytes > cd->rd_maxcount)
2998 cd->rd_maxcount -= entry_bytes;
3000 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so
3001 * let's always let through the first entry, at least:
3003 if (!cd->rd_dircount)
3005 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3006 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3008 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3010 cd->cookie_offset = cookie_offset;
3012 cd->common.err = nfs_ok;
3015 xdr_truncate_encode(xdr, start_offset);
3016 cd->common.err = nfserr;
3021 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3025 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3027 return nfserr_resource;
3028 *p++ = cpu_to_be32(sid->si_generation);
3029 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3030 sizeof(stateid_opaque_t));
3035 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3037 struct xdr_stream *xdr = &resp->xdr;
3041 p = xdr_reserve_space(xdr, 8);
3043 return nfserr_resource;
3044 *p++ = cpu_to_be32(access->ac_supported);
3045 *p++ = cpu_to_be32(access->ac_resp_access);
3050 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3052 struct xdr_stream *xdr = &resp->xdr;
3056 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3058 return nfserr_resource;
3059 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3060 NFS4_MAX_SESSIONID_LEN);
3061 *p++ = cpu_to_be32(bcts->dir);
3062 /* Upshifting from TCP to RDMA is not supported */
3063 *p++ = cpu_to_be32(0);
3069 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3071 struct xdr_stream *xdr = &resp->xdr;
3074 nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid);
3081 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3083 struct xdr_stream *xdr = &resp->xdr;
3087 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3089 return nfserr_resource;
3090 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3091 NFS4_VERIFIER_SIZE);
3097 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3099 struct xdr_stream *xdr = &resp->xdr;
3103 p = xdr_reserve_space(xdr, 20);
3105 return nfserr_resource;
3106 encode_cinfo(p, &create->cr_cinfo);
3107 nfserr = nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3108 create->cr_bmval[1], create->cr_bmval[2]);
3114 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3116 struct svc_fh *fhp = getattr->ga_fhp;
3117 struct xdr_stream *xdr = &resp->xdr;
3122 nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3129 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3131 struct xdr_stream *xdr = &resp->xdr;
3132 struct svc_fh *fhp = *fhpp;
3137 len = fhp->fh_handle.fh_size;
3138 p = xdr_reserve_space(xdr, len + 4);
3140 return nfserr_resource;
3141 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3147 * Including all fields other than the name, a LOCK4denied structure requires
3148 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3151 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3153 struct xdr_netobj *conf = &ld->ld_owner;
3157 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3160 * Don't fail to return the result just because we can't
3161 * return the conflicting open:
3169 return nfserr_resource;
3171 p = xdr_encode_hyper(p, ld->ld_start);
3172 p = xdr_encode_hyper(p, ld->ld_length);
3173 *p++ = cpu_to_be32(ld->ld_type);
3175 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3176 p = xdr_encode_opaque(p, conf->data, conf->len);
3178 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3179 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3180 *p++ = cpu_to_be32(0); /* length of owner name */
3182 return nfserr_denied;
3186 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3188 struct xdr_stream *xdr = &resp->xdr;
3191 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3192 else if (nfserr == nfserr_denied)
3193 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3199 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3201 struct xdr_stream *xdr = &resp->xdr;
3203 if (nfserr == nfserr_denied)
3204 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3209 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3211 struct xdr_stream *xdr = &resp->xdr;
3214 nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3221 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3223 struct xdr_stream *xdr = &resp->xdr;
3227 p = xdr_reserve_space(xdr, 20);
3229 return nfserr_resource;
3230 p = encode_cinfo(p, &link->li_cinfo);
3237 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3239 struct xdr_stream *xdr = &resp->xdr;
3245 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3248 p = xdr_reserve_space(xdr, 24);
3250 return nfserr_resource;
3251 p = encode_cinfo(p, &open->op_cinfo);
3252 *p++ = cpu_to_be32(open->op_rflags);
3254 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3259 p = xdr_reserve_space(xdr, 4);
3261 return nfserr_resource;
3263 *p++ = cpu_to_be32(open->op_delegate_type);
3264 switch (open->op_delegate_type) {
3265 case NFS4_OPEN_DELEGATE_NONE:
3267 case NFS4_OPEN_DELEGATE_READ:
3268 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3271 p = xdr_reserve_space(xdr, 20);
3273 return nfserr_resource;
3274 *p++ = cpu_to_be32(open->op_recall);
3277 * TODO: ACE's in delegations
3279 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3280 *p++ = cpu_to_be32(0);
3281 *p++ = cpu_to_be32(0);
3282 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3284 case NFS4_OPEN_DELEGATE_WRITE:
3285 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3288 p = xdr_reserve_space(xdr, 32);
3290 return nfserr_resource;
3291 *p++ = cpu_to_be32(0);
3294 * TODO: space_limit's in delegations
3296 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3297 *p++ = cpu_to_be32(~(u32)0);
3298 *p++ = cpu_to_be32(~(u32)0);
3301 * TODO: ACE's in delegations
3303 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3304 *p++ = cpu_to_be32(0);
3305 *p++ = cpu_to_be32(0);
3306 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3308 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3309 switch (open->op_why_no_deleg) {
3310 case WND4_CONTENTION:
3312 p = xdr_reserve_space(xdr, 8);
3314 return nfserr_resource;
3315 *p++ = cpu_to_be32(open->op_why_no_deleg);
3316 /* deleg signaling not supported yet: */
3317 *p++ = cpu_to_be32(0);
3320 p = xdr_reserve_space(xdr, 4);
3322 return nfserr_resource;
3323 *p++ = cpu_to_be32(open->op_why_no_deleg);
3329 /* XXX save filehandle here */
3335 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3337 struct xdr_stream *xdr = &resp->xdr;
3340 nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3346 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3348 struct xdr_stream *xdr = &resp->xdr;
3351 nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid);
3356 static __be32 nfsd4_encode_splice_read(
3357 struct nfsd4_compoundres *resp,
3358 struct nfsd4_read *read,
3359 struct file *file, unsigned long maxcount)
3361 struct xdr_stream *xdr = &resp->xdr;
3362 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;
3374 nfserr = nfsd_splice_read(read->rd_rqstp, file,
3375 read->rd_offset, &maxcount);
3378 * nfsd_splice_actor may have already messed with the
3379 * page length; reset it so as not to confuse
3380 * xdr_truncate_encode:
3386 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3387 d_inode(read->rd_fhp->fh_dentry)->i_size);
3389 *(p++) = htonl(eof);
3390 *(p++) = htonl(maxcount);
3392 buf->page_len = maxcount;
3393 buf->len += maxcount;
3394 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3397 /* Use rest of head for padding and remaining ops: */
3398 buf->tail[0].iov_base = xdr->p;
3399 buf->tail[0].iov_len = 0;
3400 xdr->iov = buf->tail;
3402 int pad = 4 - (maxcount&3);
3406 buf->tail[0].iov_base += maxcount&3;
3407 buf->tail[0].iov_len = pad;
3411 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3412 buf->buflen - buf->len);
3413 buf->buflen = buf->len + space_left;
3414 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3419 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3420 struct nfsd4_read *read,
3421 struct file *file, unsigned long maxcount)
3423 struct xdr_stream *xdr = &resp->xdr;
3426 int starting_len = xdr->buf->len - 8;
3438 thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p));
3439 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3441 resp->rqstp->rq_vec[v].iov_base = p;
3442 resp->rqstp->rq_vec[v].iov_len = thislen;
3447 thislen = min_t(long, len, PAGE_SIZE);
3448 p = xdr_reserve_space(xdr, (thislen+3)&~3);
3450 resp->rqstp->rq_vec[v].iov_base = p;
3451 resp->rqstp->rq_vec[v].iov_len = thislen;
3458 nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec,
3459 read->rd_vlen, &maxcount);
3462 xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3));
3464 eof = nfsd_eof_on_read(len, maxcount, read->rd_offset,
3465 d_inode(read->rd_fhp->fh_dentry)->i_size);
3468 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3469 tmp = htonl(maxcount);
3470 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3472 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3473 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3480 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3481 struct nfsd4_read *read)
3483 unsigned long maxcount;
3484 struct xdr_stream *xdr = &resp->xdr;
3485 struct file *file = read->rd_filp;
3486 int starting_len = xdr->buf->len;
3487 struct raparms *ra = NULL;
3493 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3495 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3496 nfserr = nfserr_resource;
3499 if (resp->xdr.buf->page_len &&
3500 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3502 nfserr = nfserr_resource;
3505 xdr_commit_encode(xdr);
3507 maxcount = svc_max_payload(resp->rqstp);
3508 maxcount = min_t(unsigned long, maxcount,
3509 (xdr->buf->buflen - xdr->buf->len));
3510 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3512 if (read->rd_tmp_file)
3513 ra = nfsd_init_raparms(file);
3515 if (file->f_op->splice_read &&
3516 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3517 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3519 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3522 nfsd_put_raparams(file, ra);
3525 xdr_truncate_encode(xdr, starting_len);
3534 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3539 struct xdr_stream *xdr = &resp->xdr;
3540 int length_offset = xdr->buf->len;
3546 p = xdr_reserve_space(xdr, 4);
3548 return nfserr_resource;
3549 maxcount = PAGE_SIZE;
3551 p = xdr_reserve_space(xdr, maxcount);
3553 return nfserr_resource;
3555 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3556 * if they would overflow the buffer. Is this kosher in NFSv4? If
3557 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3558 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3560 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3561 (char *)p, &maxcount);
3562 if (nfserr == nfserr_isdir)
3563 nfserr = nfserr_inval;
3565 xdr_truncate_encode(xdr, length_offset);
3569 wire_count = htonl(maxcount);
3570 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3571 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3573 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3574 &zero, 4 - (maxcount&3));
3579 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3585 struct xdr_stream *xdr = &resp->xdr;
3586 int starting_len = xdr->buf->len;
3592 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3594 return nfserr_resource;
3596 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3597 *p++ = cpu_to_be32(0);
3598 *p++ = cpu_to_be32(0);
3599 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3600 - (char *)resp->xdr.buf->head[0].iov_base;
3603 * Number of bytes left for directory entries allowing for the
3604 * final 8 bytes of the readdir and a following failed op:
3606 bytes_left = xdr->buf->buflen - xdr->buf->len
3607 - COMPOUND_ERR_SLACK_SPACE - 8;
3608 if (bytes_left < 0) {
3609 nfserr = nfserr_resource;
3612 maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX);
3614 * Note the rfc defines rd_maxcount as the size of the
3615 * READDIR4resok structure, which includes the verifier above
3616 * and the 8 bytes encoded at the end of this function:
3618 if (maxcount < 16) {
3619 nfserr = nfserr_toosmall;
3622 maxcount = min_t(int, maxcount-16, bytes_left);
3624 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3625 if (!readdir->rd_dircount)
3626 readdir->rd_dircount = INT_MAX;
3629 readdir->rd_maxcount = maxcount;
3630 readdir->common.err = 0;
3631 readdir->cookie_offset = 0;
3633 offset = readdir->rd_cookie;
3634 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3636 &readdir->common, nfsd4_encode_dirent);
3637 if (nfserr == nfs_ok &&
3638 readdir->common.err == nfserr_toosmall &&
3639 xdr->buf->len == starting_len + 8) {
3640 /* nothing encoded; which limit did we hit?: */
3641 if (maxcount - 16 < bytes_left)
3642 /* It was the fault of rd_maxcount: */
3643 nfserr = nfserr_toosmall;
3645 /* We ran out of buffer space: */
3646 nfserr = nfserr_resource;
3651 if (readdir->cookie_offset) {
3652 wire_offset = cpu_to_be64(offset);
3653 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
3657 p = xdr_reserve_space(xdr, 8);
3662 *p++ = 0; /* no more entries */
3663 *p++ = htonl(readdir->common.err == nfserr_eof);
3667 xdr_truncate_encode(xdr, starting_len);
3672 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3674 struct xdr_stream *xdr = &resp->xdr;
3678 p = xdr_reserve_space(xdr, 20);
3680 return nfserr_resource;
3681 p = encode_cinfo(p, &remove->rm_cinfo);
3687 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3689 struct xdr_stream *xdr = &resp->xdr;
3693 p = xdr_reserve_space(xdr, 40);
3695 return nfserr_resource;
3696 p = encode_cinfo(p, &rename->rn_sinfo);
3697 p = encode_cinfo(p, &rename->rn_tinfo);
3703 nfsd4_do_encode_secinfo(struct xdr_stream *xdr,
3704 __be32 nfserr, struct svc_export *exp)
3706 u32 i, nflavs, supported;
3707 struct exp_flavor_info *flavs;
3708 struct exp_flavor_info def_flavs[2];
3709 __be32 *p, *flavorsp;
3710 static bool report = true;
3714 nfserr = nfserr_resource;
3715 if (exp->ex_nflavors) {
3716 flavs = exp->ex_flavors;
3717 nflavs = exp->ex_nflavors;
3718 } else { /* Handling of some defaults in absence of real secinfo: */
3720 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3722 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3723 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3724 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3726 flavs[0].pseudoflavor
3727 = svcauth_gss_flavor(exp->ex_client);
3730 flavs[0].pseudoflavor
3731 = exp->ex_client->flavour->flavour;
3736 p = xdr_reserve_space(xdr, 4);
3739 flavorsp = p++; /* to be backfilled later */
3741 for (i = 0; i < nflavs; i++) {
3742 rpc_authflavor_t pf = flavs[i].pseudoflavor;
3743 struct rpcsec_gss_info info;
3745 if (rpcauth_get_gssinfo(pf, &info) == 0) {
3747 p = xdr_reserve_space(xdr, 4 + 4 +
3748 XDR_LEN(info.oid.len) + 4 + 4);
3751 *p++ = cpu_to_be32(RPC_AUTH_GSS);
3752 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
3753 *p++ = cpu_to_be32(info.qop);
3754 *p++ = cpu_to_be32(info.service);
3755 } else if (pf < RPC_AUTH_MAXFLAVOR) {
3757 p = xdr_reserve_space(xdr, 4);
3760 *p++ = cpu_to_be32(pf);
3763 pr_warn("NFS: SECINFO: security flavor %u "
3764 "is not supported\n", pf);
3768 if (nflavs != supported)
3770 *flavorsp = htonl(supported);
3779 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3780 struct nfsd4_secinfo *secinfo)
3782 struct xdr_stream *xdr = &resp->xdr;
3784 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp);
3788 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3789 struct nfsd4_secinfo_no_name *secinfo)
3791 struct xdr_stream *xdr = &resp->xdr;
3793 return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp);
3797 * The SETATTR encode routine is special -- it always encodes a bitmap,
3798 * regardless of the error status.
3801 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3803 struct xdr_stream *xdr = &resp->xdr;
3806 p = xdr_reserve_space(xdr, 16);
3808 return nfserr_resource;
3810 *p++ = cpu_to_be32(3);
3811 *p++ = cpu_to_be32(0);
3812 *p++ = cpu_to_be32(0);
3813 *p++ = cpu_to_be32(0);
3816 *p++ = cpu_to_be32(3);
3817 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
3818 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
3819 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
3825 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3827 struct xdr_stream *xdr = &resp->xdr;
3831 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
3833 return nfserr_resource;
3834 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
3835 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
3836 NFS4_VERIFIER_SIZE);
3838 else if (nfserr == nfserr_clid_inuse) {
3839 p = xdr_reserve_space(xdr, 8);
3841 return nfserr_resource;
3842 *p++ = cpu_to_be32(0);
3843 *p++ = cpu_to_be32(0);
3849 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3851 struct xdr_stream *xdr = &resp->xdr;
3855 p = xdr_reserve_space(xdr, 16);
3857 return nfserr_resource;
3858 *p++ = cpu_to_be32(write->wr_bytes_written);
3859 *p++ = cpu_to_be32(write->wr_how_written);
3860 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
3861 NFS4_VERIFIER_SIZE);
3867 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3868 struct nfsd4_exchange_id *exid)
3870 struct xdr_stream *xdr = &resp->xdr;
3875 int server_scope_sz;
3877 uint64_t minor_id = 0;
3882 major_id = utsname()->nodename;
3883 major_id_sz = strlen(major_id);
3884 server_scope = utsname()->nodename;
3885 server_scope_sz = strlen(server_scope);
3887 p = xdr_reserve_space(xdr,
3888 8 /* eir_clientid */ +
3889 4 /* eir_sequenceid */ +
3893 return nfserr_resource;
3895 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
3896 *p++ = cpu_to_be32(exid->seqid);
3897 *p++ = cpu_to_be32(exid->flags);
3899 *p++ = cpu_to_be32(exid->spa_how);
3901 switch (exid->spa_how) {
3905 /* spo_must_enforce bitmap: */
3906 status = nfsd4_encode_bitmap(xdr,
3907 exid->spo_must_enforce[0],
3908 exid->spo_must_enforce[1],
3909 exid->spo_must_enforce[2]);
3912 /* spo_must_allow bitmap: */
3913 status = nfsd4_encode_bitmap(xdr,
3914 exid->spo_must_allow[0],
3915 exid->spo_must_allow[1],
3916 exid->spo_must_allow[2]);
3924 p = xdr_reserve_space(xdr,
3925 8 /* so_minor_id */ +
3926 4 /* so_major_id.len */ +
3927 (XDR_QUADLEN(major_id_sz) * 4) +
3928 4 /* eir_server_scope.len */ +
3929 (XDR_QUADLEN(server_scope_sz) * 4) +
3930 4 /* eir_server_impl_id.count (0) */);
3932 return nfserr_resource;
3934 /* The server_owner struct */
3935 p = xdr_encode_hyper(p, minor_id); /* Minor id */
3937 p = xdr_encode_opaque(p, major_id, major_id_sz);
3940 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
3942 /* Implementation id */
3943 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
3950 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3951 struct nfsd4_create_session *sess)
3953 struct xdr_stream *xdr = &resp->xdr;
3959 p = xdr_reserve_space(xdr, 24);
3961 return nfserr_resource;
3962 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
3963 NFS4_MAX_SESSIONID_LEN);
3964 *p++ = cpu_to_be32(sess->seqid);
3965 *p++ = cpu_to_be32(sess->flags);
3967 p = xdr_reserve_space(xdr, 28);
3969 return nfserr_resource;
3970 *p++ = cpu_to_be32(0); /* headerpadsz */
3971 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
3972 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
3973 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
3974 *p++ = cpu_to_be32(sess->fore_channel.maxops);
3975 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
3976 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
3978 if (sess->fore_channel.nr_rdma_attrs) {
3979 p = xdr_reserve_space(xdr, 4);
3981 return nfserr_resource;
3982 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
3985 p = xdr_reserve_space(xdr, 28);
3987 return nfserr_resource;
3988 *p++ = cpu_to_be32(0); /* headerpadsz */
3989 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
3990 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
3991 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
3992 *p++ = cpu_to_be32(sess->back_channel.maxops);
3993 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
3994 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
3996 if (sess->back_channel.nr_rdma_attrs) {
3997 p = xdr_reserve_space(xdr, 4);
3999 return nfserr_resource;
4000 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4006 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4007 struct nfsd4_sequence *seq)
4009 struct xdr_stream *xdr = &resp->xdr;
4015 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4017 return nfserr_resource;
4018 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4019 NFS4_MAX_SESSIONID_LEN);
4020 *p++ = cpu_to_be32(seq->seqid);
4021 *p++ = cpu_to_be32(seq->slotid);
4022 /* Note slotid's are numbered from zero: */
4023 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4024 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4025 *p++ = cpu_to_be32(seq->status_flags);
4027 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4032 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4033 struct nfsd4_test_stateid *test_stateid)
4035 struct xdr_stream *xdr = &resp->xdr;
4036 struct nfsd4_test_stateid_id *stateid, *next;
4042 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4044 return nfserr_resource;
4045 *p++ = htonl(test_stateid->ts_num_ids);
4047 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4048 *p++ = stateid->ts_id_status;
4054 #ifdef CONFIG_NFSD_PNFS
4056 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4057 struct nfsd4_getdeviceinfo *gdev)
4059 struct xdr_stream *xdr = &resp->xdr;
4060 const struct nfsd4_layout_ops *ops =
4061 nfsd4_layout_ops[gdev->gd_layout_type];
4062 u32 starting_len = xdr->buf->len, needed_len;
4065 dprintk("%s: err %d\n", __func__, nfserr);
4069 nfserr = nfserr_resource;
4070 p = xdr_reserve_space(xdr, 4);
4074 *p++ = cpu_to_be32(gdev->gd_layout_type);
4076 /* If maxcount is 0 then just update notifications */
4077 if (gdev->gd_maxcount != 0) {
4078 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4081 * We don't bother to burden the layout drivers with
4082 * enforcing gd_maxcount, just tell the client to
4083 * come back with a bigger buffer if it's not enough.
4085 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4091 nfserr = nfserr_resource;
4092 if (gdev->gd_notify_types) {
4093 p = xdr_reserve_space(xdr, 4 + 4);
4096 *p++ = cpu_to_be32(1); /* bitmap length */
4097 *p++ = cpu_to_be32(gdev->gd_notify_types);
4099 p = xdr_reserve_space(xdr, 4);
4107 kfree(gdev->gd_device);
4108 dprintk("%s: done: %d\n", __func__, be32_to_cpu(nfserr));
4112 dprintk("%s: maxcount too small\n", __func__);
4113 needed_len = xdr->buf->len + 4 /* notifications */;
4114 xdr_truncate_encode(xdr, starting_len);
4115 p = xdr_reserve_space(xdr, 4);
4117 nfserr = nfserr_resource;
4119 *p++ = cpu_to_be32(needed_len);
4120 nfserr = nfserr_toosmall;
4126 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4127 struct nfsd4_layoutget *lgp)
4129 struct xdr_stream *xdr = &resp->xdr;
4130 const struct nfsd4_layout_ops *ops =
4131 nfsd4_layout_ops[lgp->lg_layout_type];
4134 dprintk("%s: err %d\n", __func__, nfserr);
4138 nfserr = nfserr_resource;
4139 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4143 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4144 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4145 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4146 sizeof(stateid_opaque_t));
4148 *p++ = cpu_to_be32(1); /* we always return a single layout */
4149 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4150 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4151 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4152 *p++ = cpu_to_be32(lgp->lg_layout_type);
4154 nfserr = ops->encode_layoutget(xdr, lgp);
4156 kfree(lgp->lg_content);
4161 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4162 struct nfsd4_layoutcommit *lcp)
4164 struct xdr_stream *xdr = &resp->xdr;
4170 p = xdr_reserve_space(xdr, 4);
4172 return nfserr_resource;
4173 *p++ = cpu_to_be32(lcp->lc_size_chg);
4174 if (lcp->lc_size_chg) {
4175 p = xdr_reserve_space(xdr, 8);
4177 return nfserr_resource;
4178 p = xdr_encode_hyper(p, lcp->lc_newsize);
4185 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4186 struct nfsd4_layoutreturn *lrp)
4188 struct xdr_stream *xdr = &resp->xdr;
4194 p = xdr_reserve_space(xdr, 4);
4196 return nfserr_resource;
4197 *p++ = cpu_to_be32(lrp->lrs_present);
4198 if (lrp->lrs_present)
4199 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4202 #endif /* CONFIG_NFSD_PNFS */
4205 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4206 struct nfsd4_seek *seek)
4213 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4214 *p++ = cpu_to_be32(seek->seek_eof);
4215 p = xdr_encode_hyper(p, seek->seek_pos);
4221 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4226 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
4229 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
4230 * since we don't need to filter out obsolete ops as this is
4231 * done in the decoding phase.
4233 static nfsd4_enc nfsd4_enc_ops[] = {
4234 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
4235 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
4236 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
4237 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
4238 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
4239 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4240 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
4241 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
4242 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
4243 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
4244 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
4245 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
4246 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
4247 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
4248 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4249 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
4250 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
4251 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
4252 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
4253 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
4254 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
4255 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
4256 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
4257 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
4258 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
4259 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
4260 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
4261 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
4262 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
4263 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
4264 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
4265 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
4266 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
4267 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
4268 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
4269 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
4270 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
4272 /* NFSv4.1 operations */
4273 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
4274 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
4275 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
4276 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
4277 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
4278 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
4279 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4280 #ifdef CONFIG_NFSD_PNFS
4281 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
4282 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4283 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
4284 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
4285 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
4287 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
4288 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
4289 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
4290 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
4291 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
4293 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
4294 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
4295 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
4296 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
4297 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
4298 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
4299 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
4301 /* NFSv4.2 operations */
4302 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4303 [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop,
4304 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop,
4305 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
4306 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
4307 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
4308 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
4309 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
4310 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop,
4311 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop,
4312 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
4313 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
4314 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
4318 * Calculate whether we still have space to encode repsize bytes.
4319 * There are two considerations:
4320 * - For NFS versions >=4.1, the size of the reply must stay within
4322 * - For all NFS versions, we must stay within limited preallocated
4325 * This is called before the operation is processed, so can only provide
4326 * an upper estimate. For some nonidempotent operations (such as
4327 * getattr), it's not necessarily a problem if that estimate is wrong,
4328 * as we can fail it after processing without significant side effects.
4330 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
4332 struct xdr_buf *buf = &resp->rqstp->rq_res;
4333 struct nfsd4_slot *slot = resp->cstate.slot;
4335 if (buf->len + respsize <= buf->buflen)
4337 if (!nfsd4_has_session(&resp->cstate))
4338 return nfserr_resource;
4339 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
4341 return nfserr_rep_too_big_to_cache;
4343 return nfserr_rep_too_big;
4347 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
4349 struct xdr_stream *xdr = &resp->xdr;
4350 struct nfs4_stateowner *so = resp->cstate.replay_owner;
4351 struct svc_rqst *rqstp = resp->rqstp;
4352 int post_err_offset;
4356 p = xdr_reserve_space(xdr, 8);
4361 *p++ = cpu_to_be32(op->opnum);
4362 post_err_offset = xdr->buf->len;
4364 if (op->opnum == OP_ILLEGAL)
4366 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
4367 !nfsd4_enc_ops[op->opnum]);
4368 encoder = nfsd4_enc_ops[op->opnum];
4369 op->status = encoder(resp, op->status, &op->u);
4370 xdr_commit_encode(xdr);
4372 /* nfsd4_check_resp_size guarantees enough room for error status */
4374 int space_needed = 0;
4375 if (!nfsd4_last_compound_op(rqstp))
4376 space_needed = COMPOUND_ERR_SLACK_SPACE;
4377 op->status = nfsd4_check_resp_size(resp, space_needed);
4379 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
4380 struct nfsd4_slot *slot = resp->cstate.slot;
4382 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
4383 op->status = nfserr_rep_too_big_to_cache;
4385 op->status = nfserr_rep_too_big;
4387 if (op->status == nfserr_resource ||
4388 op->status == nfserr_rep_too_big ||
4389 op->status == nfserr_rep_too_big_to_cache) {
4391 * The operation may have already been encoded or
4392 * partially encoded. No op returns anything additional
4393 * in the case of one of these three errors, so we can
4394 * just truncate back to after the status. But it's a
4395 * bug if we had to do this on a non-idempotent op:
4397 warn_on_nonidempotent_op(op);
4398 xdr_truncate_encode(xdr, post_err_offset);
4401 int len = xdr->buf->len - post_err_offset;
4403 so->so_replay.rp_status = op->status;
4404 so->so_replay.rp_buflen = len;
4405 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
4406 so->so_replay.rp_buf, len);
4409 /* Note that op->status is already in network byte order: */
4410 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
4414 * Encode the reply stored in the stateowner reply cache
4416 * XDR note: do not encode rp->rp_buflen: the buffer contains the
4417 * previously sent already encoded operation.
4420 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
4423 struct nfs4_replay *rp = op->replay;
4427 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
4432 *p++ = cpu_to_be32(op->opnum);
4433 *p++ = rp->rp_status; /* already xdr'ed */
4435 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
4439 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
4441 return xdr_ressize_check(rqstp, p);
4444 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
4446 struct svc_rqst *rqstp = rq;
4447 struct nfsd4_compoundargs *args = rqstp->rq_argp;
4449 if (args->ops != args->iops) {
4451 args->ops = args->iops;
4455 while (args->to_free) {
4456 struct svcxdr_tmpbuf *tb = args->to_free;
4457 args->to_free = tb->next;
4464 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
4466 if (rqstp->rq_arg.head[0].iov_len % 4) {
4467 /* client is nuts */
4468 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
4469 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
4473 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
4474 args->pagelist = rqstp->rq_arg.pages;
4475 args->pagelen = rqstp->rq_arg.page_len;
4477 args->to_free = NULL;
4478 args->ops = args->iops;
4479 args->rqstp = rqstp;
4481 return !nfsd4_decode_compound(args);
4485 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
4488 * All that remains is to write the tag and operation count...
4490 struct xdr_buf *buf = resp->xdr.buf;
4492 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
4493 buf->tail[0].iov_len);
4495 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
4498 *p++ = htonl(resp->taglen);
4499 memcpy(p, resp->tag, resp->taglen);
4500 p += XDR_QUADLEN(resp->taglen);
4501 *p++ = htonl(resp->opcnt);
4503 nfsd4_sequence_done(resp);