2 * Server-side XDR for NFSv4
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 * TODO: Neil Brown made the following observation: We currently
36 * initially reserve NFSD_BUFSIZE space on the transmit queue and
37 * never release any of that until the request is complete.
38 * It would be good to calculate a new maximum response size while
39 * decoding the COMPOUND, and call svc_reserve with this number
40 * at the end of nfs4svc_decode_compoundargs.
43 #include <linux/slab.h>
44 #include <linux/namei.h>
45 #include <linux/statfs.h>
46 #include <linux/utsname.h>
47 #include <linux/pagemap.h>
48 #include <linux/sunrpc/svcauth_gss.h>
57 #define NFSDDBG_FACILITY NFSDDBG_XDR
60 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
61 * directory in order to indicate to the client that a filesystem boundary is present
62 * We use a fixed fsid for a referral
64 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
65 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
68 check_filename(char *str, int len, __be32 err)
74 if (isdotent(str, len))
76 for (i = 0; i < len; i++)
90 dprintk("NFSD: xdr error (%s:%d)\n", \
91 __FILE__, __LINE__); \
92 status = nfserr_bad_xdr; \
95 #define READ32(x) (x) = ntohl(*p++)
96 #define READ64(x) do { \
97 (x) = (u64)ntohl(*p++) << 32; \
100 #define READTIME(x) do { \
105 #define READMEM(x,nbytes) do { \
107 p += XDR_QUADLEN(nbytes); \
109 #define SAVEMEM(x,nbytes) do { \
110 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
111 savemem(argp, p, nbytes) : \
113 dprintk("NFSD: xdr error (%s:%d)\n", \
114 __FILE__, __LINE__); \
117 p += XDR_QUADLEN(nbytes); \
119 #define COPYMEM(x,nbytes) do { \
120 memcpy((x), p, nbytes); \
121 p += XDR_QUADLEN(nbytes); \
124 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
125 #define READ_BUF(nbytes) do { \
126 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
128 argp->p += XDR_QUADLEN(nbytes); \
129 } else if (!(p = read_buf(argp, nbytes))) { \
130 dprintk("NFSD: xdr error (%s:%d)\n", \
131 __FILE__, __LINE__); \
136 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
138 /* We want more bytes than seem to be available.
139 * Maybe we need a new page, maybe we have just run out
141 unsigned int avail = (char *)argp->end - (char *)argp->p;
143 if (avail + argp->pagelen < nbytes)
145 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
147 /* ok, we can do it with the current plus the next page */
148 if (nbytes <= sizeof(argp->tmp))
152 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
158 * The following memcpy is safe because read_buf is always
159 * called with nbytes > avail, and the two cases above both
160 * guarantee p points to at least nbytes bytes.
162 memcpy(p, argp->p, avail);
163 /* step to next page */
164 argp->p = page_address(argp->pagelist[0]);
166 if (argp->pagelen < PAGE_SIZE) {
167 argp->end = argp->p + (argp->pagelen>>2);
170 argp->end = argp->p + (PAGE_SIZE>>2);
171 argp->pagelen -= PAGE_SIZE;
173 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
174 argp->p += XDR_QUADLEN(nbytes - avail);
178 static int zero_clientid(clientid_t *clid)
180 return (clid->cl_boot == 0) && (clid->cl_id == 0);
184 defer_free(struct nfsd4_compoundargs *argp,
185 void (*release)(const void *), void *p)
189 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
193 tb->release = release;
194 tb->next = argp->to_free;
199 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
201 if (p == argp->tmp) {
202 p = kmemdup(argp->tmp, nbytes, GFP_KERNEL);
206 BUG_ON(p != argp->tmpp);
209 if (defer_free(argp, kfree, p)) {
217 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
231 READ_BUF(bmlen << 2);
243 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
244 struct iattr *iattr, struct nfs4_acl **acl)
246 int expected_len, len = 0;
253 if ((status = nfsd4_decode_bitmap(argp, bmval)))
257 READ32(expected_len);
259 if (bmval[0] & FATTR4_WORD0_SIZE) {
262 READ64(iattr->ia_size);
263 iattr->ia_valid |= ATTR_SIZE;
265 if (bmval[0] & FATTR4_WORD0_ACL) {
267 struct nfs4_ace *ace;
269 READ_BUF(4); len += 4;
272 if (nace > NFS4_ACL_MAX)
273 return nfserr_resource;
275 *acl = nfs4_acl_new(nace);
280 defer_free(argp, kfree, *acl);
282 (*acl)->naces = nace;
283 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
284 READ_BUF(16); len += 16;
287 READ32(ace->access_mask);
290 len += XDR_QUADLEN(dummy32) << 2;
291 READMEM(buf, dummy32);
292 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
294 if (ace->whotype != NFS4_ACL_WHO_NAMED)
296 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
297 status = nfsd_map_name_to_gid(argp->rqstp,
298 buf, dummy32, &ace->who);
300 status = nfsd_map_name_to_uid(argp->rqstp,
301 buf, dummy32, &ace->who);
307 if (bmval[1] & FATTR4_WORD1_MODE) {
310 READ32(iattr->ia_mode);
311 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
312 iattr->ia_valid |= ATTR_MODE;
314 if (bmval[1] & FATTR4_WORD1_OWNER) {
319 len += (XDR_QUADLEN(dummy32) << 2);
320 READMEM(buf, dummy32);
321 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
323 iattr->ia_valid |= ATTR_UID;
325 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
330 len += (XDR_QUADLEN(dummy32) << 2);
331 READMEM(buf, dummy32);
332 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
334 iattr->ia_valid |= ATTR_GID;
336 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
341 case NFS4_SET_TO_CLIENT_TIME:
342 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
343 all 32 bits of 'nseconds'. */
349 READ32(iattr->ia_atime.tv_sec);
350 READ32(iattr->ia_atime.tv_nsec);
351 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
353 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
355 case NFS4_SET_TO_SERVER_TIME:
356 iattr->ia_valid |= ATTR_ATIME;
362 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
367 case NFS4_SET_TO_CLIENT_TIME:
368 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
369 all 32 bits of 'nseconds'. */
375 READ32(iattr->ia_mtime.tv_sec);
376 READ32(iattr->ia_mtime.tv_nsec);
377 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
379 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
381 case NFS4_SET_TO_SERVER_TIME:
382 iattr->ia_valid |= ATTR_MTIME;
388 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
389 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
390 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2)
391 READ_BUF(expected_len - len);
392 else if (len != expected_len)
398 status = nfserrno(host_err);
403 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
407 READ_BUF(sizeof(stateid_t));
408 READ32(sid->si_generation);
409 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
415 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
420 READ32(access->ac_req_access);
425 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
433 /* callback_sec_params4 */
436 cbs->flavor = (u32)(-1);
437 for (i = 0; i < nr_secflavs; ++i) {
442 /* Nothing to read */
443 if (cbs->flavor == (u32)(-1))
444 cbs->flavor = RPC_AUTH_NULL;
454 SAVEMEM(machine_name, dummy);
465 if (cbs->flavor == (u32)(-1)) {
468 cbs->flavor = RPC_AUTH_UNIX;
472 dprintk("RPC_AUTH_GSS callback secflavor "
477 /* gcbp_handle_from_server */
480 p += XDR_QUADLEN(dummy);
481 /* gcbp_handle_from_client */
487 dprintk("Illegal callback secflavor\n");
494 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
499 READ32(bc->bc_cb_program);
500 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
505 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
509 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
510 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
512 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
513 * could help us figure out we should be using it. */
518 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
523 READ32(close->cl_seqid);
524 return nfsd4_decode_stateid(argp, &close->cl_stateid);
531 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
536 READ64(commit->co_offset);
537 READ32(commit->co_count);
543 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
548 READ32(create->cr_type);
549 switch (create->cr_type) {
552 READ32(create->cr_linklen);
553 READ_BUF(create->cr_linklen);
554 SAVEMEM(create->cr_linkname, create->cr_linklen);
559 READ32(create->cr_specdata1);
560 READ32(create->cr_specdata2);
570 READ32(create->cr_namelen);
571 READ_BUF(create->cr_namelen);
572 SAVEMEM(create->cr_name, create->cr_namelen);
573 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
576 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
585 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
587 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
591 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
593 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
597 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
602 READ32(link->li_namelen);
603 READ_BUF(link->li_namelen);
604 SAVEMEM(link->li_name, link->li_namelen);
605 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
612 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
617 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
620 READ32(lock->lk_type);
621 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
623 READ32(lock->lk_reclaim);
624 READ64(lock->lk_offset);
625 READ64(lock->lk_length);
626 READ32(lock->lk_is_new);
628 if (lock->lk_is_new) {
630 READ32(lock->lk_new_open_seqid);
631 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
634 READ_BUF(8 + sizeof(clientid_t));
635 READ32(lock->lk_new_lock_seqid);
636 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
637 READ32(lock->lk_new_owner.len);
638 READ_BUF(lock->lk_new_owner.len);
639 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
641 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
645 READ32(lock->lk_old_lock_seqid);
652 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
657 READ32(lockt->lt_type);
658 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
660 READ64(lockt->lt_offset);
661 READ64(lockt->lt_length);
662 COPYMEM(&lockt->lt_clientid, 8);
663 READ32(lockt->lt_owner.len);
664 READ_BUF(lockt->lt_owner.len);
665 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
671 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
676 READ32(locku->lu_type);
677 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
679 READ32(locku->lu_seqid);
680 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
684 READ64(locku->lu_offset);
685 READ64(locku->lu_length);
691 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
696 READ32(lookup->lo_len);
697 READ_BUF(lookup->lo_len);
698 SAVEMEM(lookup->lo_name, lookup->lo_len);
699 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
705 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
712 *share_access = w & NFS4_SHARE_ACCESS_MASK;
713 *deleg_want = w & NFS4_SHARE_WANT_MASK;
715 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
717 switch (w & NFS4_SHARE_ACCESS_MASK) {
718 case NFS4_SHARE_ACCESS_READ:
719 case NFS4_SHARE_ACCESS_WRITE:
720 case NFS4_SHARE_ACCESS_BOTH:
723 return nfserr_bad_xdr;
725 w &= ~NFS4_SHARE_ACCESS_MASK;
728 if (!argp->minorversion)
729 return nfserr_bad_xdr;
730 switch (w & NFS4_SHARE_WANT_MASK) {
731 case NFS4_SHARE_WANT_NO_PREFERENCE:
732 case NFS4_SHARE_WANT_READ_DELEG:
733 case NFS4_SHARE_WANT_WRITE_DELEG:
734 case NFS4_SHARE_WANT_ANY_DELEG:
735 case NFS4_SHARE_WANT_NO_DELEG:
736 case NFS4_SHARE_WANT_CANCEL:
739 return nfserr_bad_xdr;
741 w &= ~NFS4_SHARE_WANT_MASK;
745 if (!deleg_when) /* open_downgrade */
748 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
749 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
750 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
751 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
755 return nfserr_bad_xdr;
758 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
764 /* Note: unlinke access bits, deny bits may be zero. */
765 if (*x & ~NFS4_SHARE_DENY_BOTH)
766 return nfserr_bad_xdr;
769 return nfserr_bad_xdr;
772 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
779 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
780 return nfserr_bad_xdr;
783 SAVEMEM(o->data, o->len);
786 return nfserr_bad_xdr;
790 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
795 memset(open->op_bmval, 0, sizeof(open->op_bmval));
796 open->op_iattr.ia_valid = 0;
797 open->op_openowner = NULL;
799 /* seqid, share_access, share_deny, clientid, ownerlen */
801 READ32(open->op_seqid);
802 /* decode, yet ignore deleg_when until supported */
803 status = nfsd4_decode_share_access(argp, &open->op_share_access,
804 &open->op_deleg_want, &dummy);
807 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
810 READ_BUF(sizeof(clientid_t));
811 COPYMEM(&open->op_clientid, sizeof(clientid_t));
812 status = nfsd4_decode_opaque(argp, &open->op_owner);
816 READ32(open->op_create);
817 switch (open->op_create) {
818 case NFS4_OPEN_NOCREATE:
820 case NFS4_OPEN_CREATE:
822 READ32(open->op_createmode);
823 switch (open->op_createmode) {
824 case NFS4_CREATE_UNCHECKED:
825 case NFS4_CREATE_GUARDED:
826 status = nfsd4_decode_fattr(argp, open->op_bmval,
827 &open->op_iattr, &open->op_acl);
831 case NFS4_CREATE_EXCLUSIVE:
832 READ_BUF(NFS4_VERIFIER_SIZE);
833 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
835 case NFS4_CREATE_EXCLUSIVE4_1:
836 if (argp->minorversion < 1)
838 READ_BUF(NFS4_VERIFIER_SIZE);
839 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
840 status = nfsd4_decode_fattr(argp, open->op_bmval,
841 &open->op_iattr, &open->op_acl);
855 READ32(open->op_claim_type);
856 switch (open->op_claim_type) {
857 case NFS4_OPEN_CLAIM_NULL:
858 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
860 READ32(open->op_fname.len);
861 READ_BUF(open->op_fname.len);
862 SAVEMEM(open->op_fname.data, open->op_fname.len);
863 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
866 case NFS4_OPEN_CLAIM_PREVIOUS:
868 READ32(open->op_delegate_type);
870 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
871 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
875 READ32(open->op_fname.len);
876 READ_BUF(open->op_fname.len);
877 SAVEMEM(open->op_fname.data, open->op_fname.len);
878 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
881 case NFS4_OPEN_CLAIM_FH:
882 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
883 if (argp->minorversion < 1)
887 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
888 if (argp->minorversion < 1)
890 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
902 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
906 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
910 READ32(open_conf->oc_seqid);
916 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
920 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
924 READ32(open_down->od_seqid);
925 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
926 &open_down->od_deleg_want, NULL);
929 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
936 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
941 READ32(putfh->pf_fhlen);
942 if (putfh->pf_fhlen > NFS4_FHSIZE)
944 READ_BUF(putfh->pf_fhlen);
945 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
951 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
955 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
959 READ64(read->rd_offset);
960 READ32(read->rd_length);
966 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
971 READ64(readdir->rd_cookie);
972 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
973 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
974 READ32(readdir->rd_maxcount);
975 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
982 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
987 READ32(remove->rm_namelen);
988 READ_BUF(remove->rm_namelen);
989 SAVEMEM(remove->rm_name, remove->rm_namelen);
990 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
997 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1002 READ32(rename->rn_snamelen);
1003 READ_BUF(rename->rn_snamelen + 4);
1004 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1005 READ32(rename->rn_tnamelen);
1006 READ_BUF(rename->rn_tnamelen);
1007 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1008 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
1010 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
1017 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1021 READ_BUF(sizeof(clientid_t));
1022 COPYMEM(clientid, sizeof(clientid_t));
1028 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1029 struct nfsd4_secinfo *secinfo)
1034 READ32(secinfo->si_namelen);
1035 READ_BUF(secinfo->si_namelen);
1036 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1037 status = check_filename(secinfo->si_name, secinfo->si_namelen,
1045 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1046 struct nfsd4_secinfo_no_name *sin)
1051 READ32(sin->sin_style);
1056 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1060 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1063 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1068 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1072 READ_BUF(NFS4_VERIFIER_SIZE);
1073 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1075 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1077 return nfserr_bad_xdr;
1079 READ32(setclientid->se_callback_prog);
1080 READ32(setclientid->se_callback_netid_len);
1082 READ_BUF(setclientid->se_callback_netid_len + 4);
1083 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1084 READ32(setclientid->se_callback_addr_len);
1086 READ_BUF(setclientid->se_callback_addr_len + 4);
1087 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1088 READ32(setclientid->se_callback_ident);
1094 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1098 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1099 COPYMEM(&scd_c->sc_clientid, 8);
1100 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1105 /* Also used for NVERIFY */
1107 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1110 struct nfsd4_compoundargs save = {
1113 .rqstp = argp->rqstp,
1116 struct iattr ve_iattr; /* request */
1117 struct nfs4_acl *ve_acl; /* request */
1121 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1124 /* For convenience's sake, we compare raw xdr'd attributes in
1125 * nfsd4_proc_verify; however we still decode here just to return
1126 * correct error in case of bad xdr. */
1128 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
1129 if (status == nfserr_inval) {
1130 status = nfserrno(status);
1135 READ32(verify->ve_attrlen);
1136 READ_BUF(verify->ve_attrlen);
1137 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1143 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1150 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1154 READ64(write->wr_offset);
1155 READ32(write->wr_stable_how);
1156 if (write->wr_stable_how > 2)
1158 READ32(write->wr_buflen);
1160 /* Sorry .. no magic macros for this.. *
1161 * READ_BUF(write->wr_buflen);
1162 * SAVEMEM(write->wr_buf, write->wr_buflen);
1164 avail = (char*)argp->end - (char*)argp->p;
1165 if (avail + argp->pagelen < write->wr_buflen) {
1166 dprintk("NFSD: xdr error (%s:%d)\n",
1167 __FILE__, __LINE__);
1170 argp->rqstp->rq_vec[0].iov_base = p;
1171 argp->rqstp->rq_vec[0].iov_len = avail;
1173 len = write->wr_buflen;
1174 while (len > argp->rqstp->rq_vec[v].iov_len) {
1175 len -= argp->rqstp->rq_vec[v].iov_len;
1177 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]);
1179 if (argp->pagelen >= PAGE_SIZE) {
1180 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE;
1181 argp->pagelen -= PAGE_SIZE;
1183 argp->rqstp->rq_vec[v].iov_len = argp->pagelen;
1184 argp->pagelen -= len;
1187 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len);
1188 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1189 argp->rqstp->rq_vec[v].iov_len = len;
1190 write->wr_vlen = v+1;
1196 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1201 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1202 READ32(rlockowner->rl_owner.len);
1203 READ_BUF(rlockowner->rl_owner.len);
1204 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1206 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1207 return nfserr_inval;
1212 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1213 struct nfsd4_exchange_id *exid)
1218 READ_BUF(NFS4_VERIFIER_SIZE);
1219 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1221 status = nfsd4_decode_opaque(argp, &exid->clname);
1223 return nfserr_bad_xdr;
1226 READ32(exid->flags);
1228 /* Ignore state_protect4_a */
1230 READ32(exid->spa_how);
1231 switch (exid->spa_how) {
1235 /* spo_must_enforce */
1238 READ_BUF(dummy * 4);
1241 /* spo_must_allow */
1244 READ_BUF(dummy * 4);
1251 READ_BUF(dummy * 4);
1256 READ_BUF(dummy * 4);
1259 /* ssp_hash_algs<> */
1266 p += XDR_QUADLEN(dummy);
1269 /* ssp_encr_algs<> */
1276 p += XDR_QUADLEN(dummy);
1279 /* ssp_window and ssp_num_gss_handles */
1288 /* Ignore Implementation ID */
1289 READ_BUF(4); /* nfs_impl_id4 array length */
1300 p += XDR_QUADLEN(dummy);
1306 p += XDR_QUADLEN(dummy);
1316 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1317 struct nfsd4_create_session *sess)
1323 COPYMEM(&sess->clientid, 8);
1324 READ32(sess->seqid);
1325 READ32(sess->flags);
1327 /* Fore channel attrs */
1329 READ32(dummy); /* headerpadsz is always 0 */
1330 READ32(sess->fore_channel.maxreq_sz);
1331 READ32(sess->fore_channel.maxresp_sz);
1332 READ32(sess->fore_channel.maxresp_cached);
1333 READ32(sess->fore_channel.maxops);
1334 READ32(sess->fore_channel.maxreqs);
1335 READ32(sess->fore_channel.nr_rdma_attrs);
1336 if (sess->fore_channel.nr_rdma_attrs == 1) {
1338 READ32(sess->fore_channel.rdma_attrs);
1339 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1340 dprintk("Too many fore channel attr bitmaps!\n");
1344 /* Back channel attrs */
1346 READ32(dummy); /* headerpadsz is always 0 */
1347 READ32(sess->back_channel.maxreq_sz);
1348 READ32(sess->back_channel.maxresp_sz);
1349 READ32(sess->back_channel.maxresp_cached);
1350 READ32(sess->back_channel.maxops);
1351 READ32(sess->back_channel.maxreqs);
1352 READ32(sess->back_channel.nr_rdma_attrs);
1353 if (sess->back_channel.nr_rdma_attrs == 1) {
1355 READ32(sess->back_channel.rdma_attrs);
1356 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1357 dprintk("Too many back channel attr bitmaps!\n");
1362 READ32(sess->callback_prog);
1363 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1368 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1369 struct nfsd4_destroy_session *destroy_session)
1372 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1373 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1379 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1380 struct nfsd4_free_stateid *free_stateid)
1384 READ_BUF(sizeof(stateid_t));
1385 READ32(free_stateid->fr_stateid.si_generation);
1386 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1392 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1393 struct nfsd4_sequence *seq)
1397 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1398 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1400 READ32(seq->slotid);
1401 READ32(seq->maxslots);
1402 READ32(seq->cachethis);
1408 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1412 struct nfsd4_test_stateid_id *stateid;
1415 test_stateid->ts_num_ids = ntohl(*p++);
1417 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1419 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1420 stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
1422 status = nfserrno(-ENOMEM);
1426 defer_free(argp, kfree, stateid);
1427 INIT_LIST_HEAD(&stateid->ts_id_list);
1428 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1430 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1439 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1440 status = nfserr_bad_xdr;
1444 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1449 COPYMEM(&dc->clientid, 8);
1454 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1459 READ32(rc->rca_one_fs);
1465 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
1471 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
1473 return nfserr_notsupp;
1476 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
1478 static nfsd4_dec nfsd4_dec_ops[] = {
1479 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1480 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1481 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1482 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1483 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1484 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1485 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1486 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1487 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1488 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1489 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1490 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1491 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1492 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1493 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1494 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1495 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1496 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
1497 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1498 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1499 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop,
1500 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1501 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1502 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1503 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1504 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1505 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1506 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
1507 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1508 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1509 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1510 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1511 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
1512 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
1513 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1514 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1515 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
1518 static nfsd4_dec nfsd41_dec_ops[] = {
1519 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
1520 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
1521 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
1522 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
1523 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
1524 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
1525 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
1526 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
1527 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
1528 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
1529 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
1530 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
1531 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
1532 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
1533 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1534 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
1535 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
1536 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp,
1537 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
1538 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
1539 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp,
1540 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
1541 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
1542 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
1543 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
1544 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
1545 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
1546 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp,
1547 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
1548 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
1549 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
1550 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
1551 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp,
1552 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp,
1553 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
1554 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
1555 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp,
1557 /* new operations for NFSv4.1 */
1558 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
1559 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
1560 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
1561 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
1562 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
1563 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
1564 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1565 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
1566 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
1567 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
1568 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
1569 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
1570 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
1571 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
1572 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
1573 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
1574 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
1575 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
1576 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
1579 struct nfsd4_minorversion_ops {
1580 nfsd4_dec *decoders;
1584 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
1585 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
1586 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
1590 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1593 struct nfsd4_op *op;
1594 struct nfsd4_minorversion_ops *ops;
1595 bool cachethis = false;
1599 READ32(argp->taglen);
1600 READ_BUF(argp->taglen + 8);
1601 SAVEMEM(argp->tag, argp->taglen);
1602 READ32(argp->minorversion);
1603 READ32(argp->opcnt);
1605 if (argp->taglen > NFSD4_MAX_TAGLEN)
1607 if (argp->opcnt > 100)
1610 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
1611 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1613 argp->ops = argp->iops;
1614 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
1619 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion))
1622 ops = &nfsd4_minorversion[argp->minorversion];
1623 for (i = 0; i < argp->opcnt; i++) {
1628 * We can't use READ_BUF() here because we need to handle
1629 * a missing opcode as an OP_WRITE + 1. So we need to check
1630 * to see if we're truly at the end of our buffer or if there
1631 * is another page we need to flip to.
1634 if (argp->p == argp->end) {
1635 if (argp->pagelen < 4) {
1636 /* There isn't an opcode still on the wire */
1637 op->opnum = OP_WRITE + 1;
1638 op->status = nfserr_bad_xdr;
1644 * False alarm. We just hit a page boundary, but there
1645 * is still data available. Move pointer across page
1646 * boundary. *snip from READ_BUF*
1648 argp->p = page_address(argp->pagelist[0]);
1650 if (argp->pagelen < PAGE_SIZE) {
1651 argp->end = argp->p + (argp->pagelen>>2);
1654 argp->end = argp->p + (PAGE_SIZE>>2);
1655 argp->pagelen -= PAGE_SIZE;
1658 op->opnum = ntohl(*argp->p++);
1660 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP)
1661 op->status = ops->decoders[op->opnum](argp, &op->u);
1663 op->opnum = OP_ILLEGAL;
1664 op->status = nfserr_op_illegal;
1672 * We'll try to cache the result in the DRC if any one
1673 * op in the compound wants to be cached:
1675 cachethis |= nfsd4_cache_this_op(op);
1677 /* Sessions make the DRC unnecessary: */
1678 if (argp->minorversion)
1680 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
1685 #define WRITE32(n) *p++ = htonl(n)
1686 #define WRITE64(n) do { \
1687 *p++ = htonl((u32)((n) >> 32)); \
1688 *p++ = htonl((u32)(n)); \
1690 #define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \
1691 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1692 memcpy(p, ptr, nbytes); \
1693 p += XDR_QUADLEN(nbytes); \
1696 static void write32(__be32 **p, u32 n)
1701 static void write64(__be32 **p, u64 n)
1703 write32(p, (n >> 32));
1707 static void write_change(__be32 **p, struct kstat *stat, struct inode *inode)
1709 if (IS_I_VERSION(inode)) {
1710 write64(p, inode->i_version);
1712 write32(p, stat->ctime.tv_sec);
1713 write32(p, stat->ctime.tv_nsec);
1717 static void write_cinfo(__be32 **p, struct nfsd4_change_info *c)
1719 write32(p, c->atomic);
1720 if (c->change_supported) {
1721 write64(p, c->before_change);
1722 write64(p, c->after_change);
1724 write32(p, c->before_ctime_sec);
1725 write32(p, c->before_ctime_nsec);
1726 write32(p, c->after_ctime_sec);
1727 write32(p, c->after_ctime_nsec);
1731 #define RESERVE_SPACE(nbytes) do { \
1733 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1735 #define ADJUST_ARGS() resp->p = p
1738 * Header routine to setup seqid operation replay cache
1740 #define ENCODE_SEQID_OP_HEAD \
1746 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1747 * is where sequence id's are incremented, and the replay cache is filled.
1748 * Note that we increment sequence id's here, at the last moment, so we're sure
1749 * we know whether the error to be returned is a sequence id mutating error.
1752 static void encode_seqid_op_tail(struct nfsd4_compoundres *resp, __be32 *save, __be32 nfserr)
1754 struct nfs4_stateowner *stateowner = resp->cstate.replay_owner;
1756 if (seqid_mutating_err(ntohl(nfserr)) && stateowner) {
1757 stateowner->so_seqid++;
1758 stateowner->so_replay.rp_status = nfserr;
1759 stateowner->so_replay.rp_buflen =
1760 (char *)resp->p - (char *)save;
1761 memcpy(stateowner->so_replay.rp_buf, save,
1762 stateowner->so_replay.rp_buflen);
1763 nfsd4_purge_closed_stateid(stateowner);
1767 /* Encode as an array of strings the string given with components
1768 * separated @sep, escaped with esc_enter and esc_exit.
1770 static __be32 nfsd4_encode_components_esc(char sep, char *components,
1771 __be32 **pp, int *buflen,
1772 char esc_enter, char esc_exit)
1776 int strlen, count=0;
1777 char *str, *end, *next;
1779 dprintk("nfsd4_encode_components(%s)\n", components);
1780 if ((*buflen -= 4) < 0)
1781 return nfserr_resource;
1782 WRITE32(0); /* We will fill this in with @count later */
1783 end = str = components;
1785 bool found_esc = false;
1787 /* try to parse as esc_start, ..., esc_end, sep */
1788 if (*str == esc_enter) {
1789 for (; *end && (*end != esc_exit); end++)
1790 /* find esc_exit or end of string */;
1792 if (*end && (!*next || *next == sep)) {
1799 for (; *end && (*end != sep); end++)
1800 /* find sep or end of string */;
1804 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0)
1805 return nfserr_resource;
1807 WRITEMEM(str, strlen);
1820 /* Encode as an array of strings the string given with components
1823 static __be32 nfsd4_encode_components(char sep, char *components,
1824 __be32 **pp, int *buflen)
1826 return nfsd4_encode_components_esc(sep, components, pp, buflen, 0, 0);
1830 * encode a location element of a fs_locations structure
1832 static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location,
1833 __be32 **pp, int *buflen)
1838 status = nfsd4_encode_components_esc(':', location->hosts, &p, buflen,
1842 status = nfsd4_encode_components('/', location->path, &p, buflen);
1850 * Encode a path in RFC3530 'pathname4' format
1852 static __be32 nfsd4_encode_path(const struct path *root,
1853 const struct path *path, __be32 **pp, int *buflen)
1857 .dentry = path->dentry,
1860 struct dentry **components = NULL;
1861 unsigned int ncomponents = 0;
1862 __be32 err = nfserr_jukebox;
1864 dprintk("nfsd4_encode_components(");
1867 /* First walk the path up to the nfsd root, and store the
1868 * dentries/path components in an array.
1871 if (cur.dentry == root->dentry && cur.mnt == root->mnt)
1873 if (cur.dentry == cur.mnt->mnt_root) {
1874 if (follow_up(&cur))
1878 if ((ncomponents & 15) == 0) {
1879 struct dentry **new;
1880 new = krealloc(components,
1881 sizeof(*new) * (ncomponents + 16),
1887 components[ncomponents++] = cur.dentry;
1888 cur.dentry = dget_parent(cur.dentry);
1894 WRITE32(ncomponents);
1896 while (ncomponents) {
1897 struct dentry *dentry = components[ncomponents - 1];
1898 unsigned int len = dentry->d_name.len;
1900 *buflen -= 4 + (XDR_QUADLEN(len) << 2);
1904 WRITEMEM(dentry->d_name.name, len);
1905 dprintk("/%s", dentry->d_name.name);
1915 dput(components[--ncomponents]);
1921 static __be32 nfsd4_encode_fsloc_fsroot(struct svc_rqst *rqstp,
1922 const struct path *path, __be32 **pp, int *buflen)
1924 struct svc_export *exp_ps;
1927 exp_ps = rqst_find_fsidzero_export(rqstp);
1929 return nfserrno(PTR_ERR(exp_ps));
1930 res = nfsd4_encode_path(&exp_ps->ex_path, path, pp, buflen);
1936 * encode a fs_locations structure
1938 static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp,
1939 struct svc_export *exp,
1940 __be32 **pp, int *buflen)
1945 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
1947 status = nfsd4_encode_fsloc_fsroot(rqstp, &exp->ex_path, &p, buflen);
1950 if ((*buflen -= 4) < 0)
1951 return nfserr_resource;
1952 WRITE32(fslocs->locations_count);
1953 for (i=0; i<fslocs->locations_count; i++) {
1954 status = nfsd4_encode_fs_location4(&fslocs->locations[i],
1963 static u32 nfs4_file_type(umode_t mode)
1965 switch (mode & S_IFMT) {
1966 case S_IFIFO: return NF4FIFO;
1967 case S_IFCHR: return NF4CHR;
1968 case S_IFDIR: return NF4DIR;
1969 case S_IFBLK: return NF4BLK;
1970 case S_IFLNK: return NF4LNK;
1971 case S_IFREG: return NF4REG;
1972 case S_IFSOCK: return NF4SOCK;
1973 default: return NF4BAD;
1978 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1979 __be32 **p, int *buflen)
1983 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1984 return nfserr_resource;
1985 if (whotype != NFS4_ACL_WHO_NAMED)
1986 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1988 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1990 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1992 return nfserrno(status);
1993 *p = xdr_encode_opaque(*p, NULL, status);
1994 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1995 BUG_ON(*buflen < 0);
1999 static inline __be32
2000 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen)
2002 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
2005 static inline __be32
2006 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen)
2008 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
2011 static inline __be32
2012 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
2013 __be32 **p, int *buflen)
2015 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
2018 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2019 FATTR4_WORD0_RDATTR_ERROR)
2020 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2022 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err)
2024 /* As per referral draft: */
2025 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2026 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2027 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2028 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2029 *rdattr_err = NFSERR_MOVED;
2031 return nfserr_moved;
2033 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2034 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2039 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2041 struct path path = exp->ex_path;
2045 while (follow_up(&path)) {
2046 if (path.dentry != path.mnt->mnt_root)
2049 err = vfs_getattr(path.mnt, path.dentry, stat);
2055 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2058 * @countp is the buffer size in _words_; upon successful return this becomes
2059 * replaced with the number of words written.
2062 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
2063 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval,
2064 struct svc_rqst *rqstp, int ignore_crossmnt)
2066 u32 bmval0 = bmval[0];
2067 u32 bmval1 = bmval[1];
2068 u32 bmval2 = bmval[2];
2070 struct svc_fh tempfh;
2071 struct kstatfs statfs;
2072 int buflen = *countp << 2;
2081 struct nfs4_acl *acl = NULL;
2082 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2083 u32 minorversion = resp->cstate.minorversion;
2084 struct path path = {
2085 .mnt = exp->ex_path.mnt,
2089 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2090 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion));
2091 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion));
2092 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion));
2094 if (exp->ex_fslocs.migrated) {
2096 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err);
2101 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
2104 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
2105 FATTR4_WORD0_MAXNAME)) ||
2106 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2107 FATTR4_WORD1_SPACE_TOTAL))) {
2108 err = vfs_statfs(&path, &statfs);
2112 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2113 fh_init(&tempfh, NFS4_FHSIZE);
2114 status = fh_compose(&tempfh, exp, dentry, NULL);
2119 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
2120 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
2121 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2122 aclsupport = (err == 0);
2123 if (bmval0 & FATTR4_WORD0_ACL) {
2124 if (err == -EOPNOTSUPP)
2125 bmval0 &= ~FATTR4_WORD0_ACL;
2126 else if (err == -EINVAL) {
2127 status = nfserr_attrnotsupp;
2129 } else if (err != 0)
2135 if ((buflen -= 16) < 0)
2141 } else if (bmval1) {
2142 if ((buflen -= 12) < 0)
2148 if ((buflen -= 8) < 0)
2153 attrlenp = p++; /* to be backfilled later */
2155 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2156 u32 word0 = nfsd_suppattrs0(minorversion);
2157 u32 word1 = nfsd_suppattrs1(minorversion);
2158 u32 word2 = nfsd_suppattrs2(minorversion);
2161 word0 &= ~FATTR4_WORD0_ACL;
2163 if ((buflen -= 12) < 0)
2169 if ((buflen -= 16) < 0)
2177 if (bmval0 & FATTR4_WORD0_TYPE) {
2178 if ((buflen -= 4) < 0)
2180 dummy = nfs4_file_type(stat.mode);
2181 if (dummy == NF4BAD)
2182 goto out_serverfault;
2185 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2186 if ((buflen -= 4) < 0)
2188 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2189 WRITE32(NFS4_FH_PERSISTENT);
2191 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
2193 if (bmval0 & FATTR4_WORD0_CHANGE) {
2194 if ((buflen -= 8) < 0)
2196 write_change(&p, &stat, dentry->d_inode);
2198 if (bmval0 & FATTR4_WORD0_SIZE) {
2199 if ((buflen -= 8) < 0)
2203 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2204 if ((buflen -= 4) < 0)
2208 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2209 if ((buflen -= 4) < 0)
2213 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2214 if ((buflen -= 4) < 0)
2218 if (bmval0 & FATTR4_WORD0_FSID) {
2219 if ((buflen -= 16) < 0)
2221 if (exp->ex_fslocs.migrated) {
2222 WRITE64(NFS4_REFERRAL_FSID_MAJOR);
2223 WRITE64(NFS4_REFERRAL_FSID_MINOR);
2224 } else switch(fsid_source(fhp)) {
2225 case FSIDSOURCE_FSID:
2226 WRITE64((u64)exp->ex_fsid);
2229 case FSIDSOURCE_DEV:
2231 WRITE32(MAJOR(stat.dev));
2233 WRITE32(MINOR(stat.dev));
2235 case FSIDSOURCE_UUID:
2236 WRITEMEM(exp->ex_uuid, 16);
2240 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2241 if ((buflen -= 4) < 0)
2245 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2246 if ((buflen -= 4) < 0)
2248 WRITE32(nfsd4_lease);
2250 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2251 if ((buflen -= 4) < 0)
2253 WRITE32(rdattr_err);
2255 if (bmval0 & FATTR4_WORD0_ACL) {
2256 struct nfs4_ace *ace;
2259 if ((buflen -= 4) < 0)
2265 if ((buflen -= 4) < 0)
2267 WRITE32(acl->naces);
2269 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2270 if ((buflen -= 4*3) < 0)
2274 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
2275 status = nfsd4_encode_aclname(rqstp, ace->whotype,
2276 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
2278 if (status == nfserr_resource)
2285 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2286 if ((buflen -= 4) < 0)
2288 WRITE32(aclsupport ?
2289 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2291 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2292 if ((buflen -= 4) < 0)
2296 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2297 if ((buflen -= 4) < 0)
2301 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2302 if ((buflen -= 4) < 0)
2306 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2307 if ((buflen -= 4) < 0)
2311 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2312 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
2315 WRITE32(fhp->fh_handle.fh_size);
2316 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
2318 if (bmval0 & FATTR4_WORD0_FILEID) {
2319 if ((buflen -= 8) < 0)
2323 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2324 if ((buflen -= 8) < 0)
2326 WRITE64((u64) statfs.f_ffree);
2328 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
2329 if ((buflen -= 8) < 0)
2331 WRITE64((u64) statfs.f_ffree);
2333 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
2334 if ((buflen -= 8) < 0)
2336 WRITE64((u64) statfs.f_files);
2338 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
2339 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen);
2340 if (status == nfserr_resource)
2345 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
2346 if ((buflen -= 4) < 0)
2350 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
2351 if ((buflen -= 8) < 0)
2355 if (bmval0 & FATTR4_WORD0_MAXLINK) {
2356 if ((buflen -= 4) < 0)
2360 if (bmval0 & FATTR4_WORD0_MAXNAME) {
2361 if ((buflen -= 4) < 0)
2363 WRITE32(statfs.f_namelen);
2365 if (bmval0 & FATTR4_WORD0_MAXREAD) {
2366 if ((buflen -= 8) < 0)
2368 WRITE64((u64) svc_max_payload(rqstp));
2370 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
2371 if ((buflen -= 8) < 0)
2373 WRITE64((u64) svc_max_payload(rqstp));
2375 if (bmval1 & FATTR4_WORD1_MODE) {
2376 if ((buflen -= 4) < 0)
2378 WRITE32(stat.mode & S_IALLUGO);
2380 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
2381 if ((buflen -= 4) < 0)
2385 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
2386 if ((buflen -= 4) < 0)
2388 WRITE32(stat.nlink);
2390 if (bmval1 & FATTR4_WORD1_OWNER) {
2391 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
2392 if (status == nfserr_resource)
2397 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
2398 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
2399 if (status == nfserr_resource)
2404 if (bmval1 & FATTR4_WORD1_RAWDEV) {
2405 if ((buflen -= 8) < 0)
2407 WRITE32((u32) MAJOR(stat.rdev));
2408 WRITE32((u32) MINOR(stat.rdev));
2410 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
2411 if ((buflen -= 8) < 0)
2413 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
2416 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
2417 if ((buflen -= 8) < 0)
2419 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
2422 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
2423 if ((buflen -= 8) < 0)
2425 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
2428 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
2429 if ((buflen -= 8) < 0)
2431 dummy64 = (u64)stat.blocks << 9;
2434 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
2435 if ((buflen -= 12) < 0)
2438 WRITE32(stat.atime.tv_sec);
2439 WRITE32(stat.atime.tv_nsec);
2441 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
2442 if ((buflen -= 12) < 0)
2448 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
2449 if ((buflen -= 12) < 0)
2452 WRITE32(stat.ctime.tv_sec);
2453 WRITE32(stat.ctime.tv_nsec);
2455 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
2456 if ((buflen -= 12) < 0)
2459 WRITE32(stat.mtime.tv_sec);
2460 WRITE32(stat.mtime.tv_nsec);
2462 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
2463 if ((buflen -= 8) < 0)
2466 * Get parent's attributes if not ignoring crossmount
2467 * and this is the root of a cross-mounted filesystem.
2469 if (ignore_crossmnt == 0 &&
2470 dentry == exp->ex_path.mnt->mnt_root)
2471 get_parent_attributes(exp, &stat);
2474 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
2476 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0);
2477 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1);
2478 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2);
2481 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2482 *countp = p - buffer;
2491 status = nfserrno(err);
2495 status = nfserr_resource;
2498 status = nfserr_serverfault;
2502 static inline int attributes_need_mount(u32 *bmval)
2504 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
2506 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
2512 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
2513 const char *name, int namlen, __be32 *p, int *buflen)
2515 struct svc_export *exp = cd->rd_fhp->fh_export;
2516 struct dentry *dentry;
2518 int ignore_crossmnt = 0;
2520 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
2522 return nfserrno(PTR_ERR(dentry));
2523 if (!dentry->d_inode) {
2525 * nfsd_buffered_readdir drops the i_mutex between
2526 * readdir and calling this callback, leaving a window
2527 * where this directory entry could have gone away.
2530 return nfserr_noent;
2535 * In the case of a mountpoint, the client may be asking for
2536 * attributes that are only properties of the underlying filesystem
2537 * as opposed to the cross-mounted file system. In such a case,
2538 * we will not follow the cross mount and will fill the attribtutes
2539 * directly from the mountpoint dentry.
2541 if (nfsd_mountpoint(dentry, exp)) {
2544 if (!(exp->ex_flags & NFSEXP_V4ROOT)
2545 && !attributes_need_mount(cd->rd_bmval)) {
2546 ignore_crossmnt = 1;
2550 * Why the heck aren't we just using nfsd_lookup??
2551 * Different "."/".." handling? Something else?
2552 * At least, add a comment here to explain....
2554 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
2556 nfserr = nfserrno(err);
2559 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
2565 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
2566 cd->rd_rqstp, ignore_crossmnt);
2574 nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr)
2581 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
2582 *p++ = htonl(0); /* bmval1 */
2585 *p++ = nfserr; /* no htonl */
2586 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
2591 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
2592 loff_t offset, u64 ino, unsigned int d_type)
2594 struct readdir_cd *ccd = ccdv;
2595 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
2597 __be32 *p = cd->buffer;
2599 __be32 nfserr = nfserr_toosmall;
2601 /* In nfsv4, "." and ".." never make it onto the wire.. */
2602 if (name && isdotent(name, namlen)) {
2603 cd->common.err = nfs_ok;
2608 xdr_encode_hyper(cd->offset, (u64) offset);
2610 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
2614 *p++ = xdr_one; /* mark entry present */
2616 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
2617 p = xdr_encode_array(p, name, namlen); /* name length & name */
2619 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
2624 case nfserr_resource:
2625 nfserr = nfserr_toosmall;
2631 * If the client requested the RDATTR_ERROR attribute,
2632 * we stuff the error code into this attribute
2633 * and continue. If this attribute was not requested,
2634 * then in accordance with the spec, we fail the
2635 * entire READDIR operation(!)
2637 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
2639 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
2641 nfserr = nfserr_toosmall;
2645 cd->buflen -= (p - cd->buffer);
2647 cd->offset = cookiep;
2649 cd->common.err = nfs_ok;
2652 cd->common.err = nfserr;
2657 nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid)
2661 RESERVE_SPACE(sizeof(stateid_t));
2662 WRITE32(sid->si_generation);
2663 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
2668 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
2674 WRITE32(access->ac_supported);
2675 WRITE32(access->ac_resp_access);
2681 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
2686 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 8);
2687 WRITEMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
2689 /* Sorry, we do not yet support RDMA over 4.1: */
2697 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
2699 ENCODE_SEQID_OP_HEAD;
2702 nfsd4_encode_stateid(resp, &close->cl_stateid);
2704 encode_seqid_op_tail(resp, save, nfserr);
2710 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
2715 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
2716 WRITEMEM(commit->co_verf.data, NFS4_VERIFIER_SIZE);
2723 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
2729 write_cinfo(&p, &create->cr_cinfo);
2731 WRITE32(create->cr_bmval[0]);
2732 WRITE32(create->cr_bmval[1]);
2739 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
2741 struct svc_fh *fhp = getattr->ga_fhp;
2747 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
2748 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
2749 resp->p, &buflen, getattr->ga_bmval,
2757 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
2759 struct svc_fh *fhp = *fhpp;
2764 len = fhp->fh_handle.fh_size;
2765 RESERVE_SPACE(len + 4);
2767 WRITEMEM(&fhp->fh_handle.fh_base, len);
2774 * Including all fields other than the name, a LOCK4denied structure requires
2775 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
2778 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
2780 struct xdr_netobj *conf = &ld->ld_owner;
2783 RESERVE_SPACE(32 + XDR_LEN(conf->len));
2784 WRITE64(ld->ld_start);
2785 WRITE64(ld->ld_length);
2786 WRITE32(ld->ld_type);
2788 WRITEMEM(&ld->ld_clientid, 8);
2790 WRITEMEM(conf->data, conf->len);
2792 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
2793 WRITE64((u64)0); /* clientid */
2794 WRITE32(0); /* length of owner name */
2800 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
2802 ENCODE_SEQID_OP_HEAD;
2805 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid);
2806 else if (nfserr == nfserr_denied)
2807 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
2809 encode_seqid_op_tail(resp, save, nfserr);
2814 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
2816 if (nfserr == nfserr_denied)
2817 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
2822 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
2824 ENCODE_SEQID_OP_HEAD;
2827 nfsd4_encode_stateid(resp, &locku->lu_stateid);
2829 encode_seqid_op_tail(resp, save, nfserr);
2835 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
2841 write_cinfo(&p, &link->li_cinfo);
2849 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
2852 ENCODE_SEQID_OP_HEAD;
2857 nfsd4_encode_stateid(resp, &open->op_stateid);
2859 write_cinfo(&p, &open->op_cinfo);
2860 WRITE32(open->op_rflags);
2862 WRITE32(open->op_bmval[0]);
2863 WRITE32(open->op_bmval[1]);
2864 WRITE32(open->op_delegate_type);
2867 switch (open->op_delegate_type) {
2868 case NFS4_OPEN_DELEGATE_NONE:
2870 case NFS4_OPEN_DELEGATE_READ:
2871 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2873 WRITE32(open->op_recall);
2876 * TODO: ACE's in delegations
2878 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2881 WRITE32(0); /* XXX: is NULL principal ok? */
2884 case NFS4_OPEN_DELEGATE_WRITE:
2885 nfsd4_encode_stateid(resp, &open->op_delegate_stateid);
2890 * TODO: space_limit's in delegations
2892 WRITE32(NFS4_LIMIT_SIZE);
2897 * TODO: ACE's in delegations
2899 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2902 WRITE32(0); /* XXX: is NULL principal ok? */
2905 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
2906 switch (open->op_why_no_deleg) {
2907 case WND4_CONTENTION:
2910 WRITE32(open->op_why_no_deleg);
2911 WRITE32(0); /* deleg signaling not supported yet */
2915 WRITE32(open->op_why_no_deleg);
2922 /* XXX save filehandle here */
2924 encode_seqid_op_tail(resp, save, nfserr);
2929 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
2931 ENCODE_SEQID_OP_HEAD;
2934 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid);
2936 encode_seqid_op_tail(resp, save, nfserr);
2941 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
2943 ENCODE_SEQID_OP_HEAD;
2946 nfsd4_encode_stateid(resp, &od->od_stateid);
2948 encode_seqid_op_tail(resp, save, nfserr);
2953 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
2954 struct nfsd4_read *read)
2958 unsigned long maxcount;
2964 if (resp->xbuf->page_len)
2965 return nfserr_resource;
2967 RESERVE_SPACE(8); /* eof flag and byte count */
2969 maxcount = svc_max_payload(resp->rqstp);
2970 if (maxcount > read->rd_length)
2971 maxcount = read->rd_length;
2976 pn = resp->rqstp->rq_resused++;
2977 resp->rqstp->rq_vec[v].iov_base =
2978 page_address(resp->rqstp->rq_respages[pn]);
2979 resp->rqstp->rq_vec[v].iov_len =
2980 len < PAGE_SIZE ? len : PAGE_SIZE;
2986 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2987 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen,
2992 eof = (read->rd_offset + maxcount >=
2993 read->rd_fhp->fh_dentry->d_inode->i_size);
2998 resp->xbuf->head[0].iov_len = (char*)p
2999 - (char*)resp->xbuf->head[0].iov_base;
3000 resp->xbuf->page_len = maxcount;
3002 /* Use rest of head for padding and remaining ops: */
3003 resp->xbuf->tail[0].iov_base = p;
3004 resp->xbuf->tail[0].iov_len = 0;
3008 resp->xbuf->tail[0].iov_base += maxcount&3;
3009 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3016 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3024 if (resp->xbuf->page_len)
3025 return nfserr_resource;
3027 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
3029 maxcount = PAGE_SIZE;
3033 * XXX: By default, the ->readlink() VFS op will truncate symlinks
3034 * if they would overflow the buffer. Is this kosher in NFSv4? If
3035 * not, one easy fix is: if ->readlink() precisely fills the buffer,
3036 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
3038 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
3039 if (nfserr == nfserr_isdir)
3040 return nfserr_inval;
3046 resp->xbuf->head[0].iov_len = (char*)p
3047 - (char*)resp->xbuf->head[0].iov_base;
3048 resp->xbuf->page_len = maxcount;
3050 /* Use rest of head for padding and remaining ops: */
3051 resp->xbuf->tail[0].iov_base = p;
3052 resp->xbuf->tail[0].iov_len = 0;
3056 resp->xbuf->tail[0].iov_base += maxcount&3;
3057 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
3064 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3068 __be32 *page, *savep, *tailbase;
3073 if (resp->xbuf->page_len)
3074 return nfserr_resource;
3076 RESERVE_SPACE(NFS4_VERIFIER_SIZE);
3079 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3083 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
3086 maxcount = PAGE_SIZE;
3087 if (maxcount > readdir->rd_maxcount)
3088 maxcount = readdir->rd_maxcount;
3091 * Convert from bytes to words, account for the two words already
3092 * written, make sure to leave two words at the end for the next
3093 * pointer and eof field.
3095 maxcount = (maxcount >> 2) - 4;
3097 nfserr = nfserr_toosmall;
3101 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]);
3102 readdir->common.err = 0;
3103 readdir->buflen = maxcount;
3104 readdir->buffer = page;
3105 readdir->offset = NULL;
3107 offset = readdir->rd_cookie;
3108 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
3110 &readdir->common, nfsd4_encode_dirent);
3111 if (nfserr == nfs_ok &&
3112 readdir->common.err == nfserr_toosmall &&
3113 readdir->buffer == page)
3114 nfserr = nfserr_toosmall;
3118 if (readdir->offset)
3119 xdr_encode_hyper(readdir->offset, offset);
3121 p = readdir->buffer;
3122 *p++ = 0; /* no more entries */
3123 *p++ = htonl(readdir->common.err == nfserr_eof);
3124 resp->xbuf->page_len = ((char*)p) - (char*)page_address(
3125 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
3127 /* Use rest of head for padding and remaining ops: */
3128 resp->xbuf->tail[0].iov_base = tailbase;
3129 resp->xbuf->tail[0].iov_len = 0;
3130 resp->p = resp->xbuf->tail[0].iov_base;
3131 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
3141 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
3147 write_cinfo(&p, &remove->rm_cinfo);
3154 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
3160 write_cinfo(&p, &rename->rn_sinfo);
3161 write_cinfo(&p, &rename->rn_tinfo);
3168 nfsd4_do_encode_secinfo(struct nfsd4_compoundres *resp,
3169 __be32 nfserr,struct svc_export *exp)
3173 struct exp_flavor_info *flavs;
3174 struct exp_flavor_info def_flavs[2];
3179 if (exp->ex_nflavors) {
3180 flavs = exp->ex_flavors;
3181 nflavs = exp->ex_nflavors;
3182 } else { /* Handling of some defaults in absence of real secinfo: */
3184 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
3186 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
3187 flavs[1].pseudoflavor = RPC_AUTH_NULL;
3188 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
3190 flavs[0].pseudoflavor
3191 = svcauth_gss_flavor(exp->ex_client);
3194 flavs[0].pseudoflavor
3195 = exp->ex_client->flavour->flavour;
3202 for (i = 0; i < nflavs; i++) {
3203 u32 flav = flavs[i].pseudoflavor;
3204 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav);
3208 WRITE32(RPC_AUTH_GSS);
3210 RESERVE_SPACE(4 + gm->gm_oid.len);
3211 WRITE32(gm->gm_oid.len);
3212 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len);
3215 WRITE32(0); /* qop */
3218 WRITE32(gss_pseudoflavor_to_service(gm, flav));
3234 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
3235 struct nfsd4_secinfo *secinfo)
3237 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->si_exp);
3241 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
3242 struct nfsd4_secinfo_no_name *secinfo)
3244 return nfsd4_do_encode_secinfo(resp, nfserr, secinfo->sin_exp);
3248 * The SETATTR encode routine is special -- it always encodes a bitmap,
3249 * regardless of the error status.
3252 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
3264 WRITE32(setattr->sa_bmval[0]);
3265 WRITE32(setattr->sa_bmval[1]);
3272 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
3277 RESERVE_SPACE(8 + NFS4_VERIFIER_SIZE);
3278 WRITEMEM(&scd->se_clientid, 8);
3279 WRITEMEM(&scd->se_confirm, NFS4_VERIFIER_SIZE);
3282 else if (nfserr == nfserr_clid_inuse) {
3292 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
3298 WRITE32(write->wr_bytes_written);
3299 WRITE32(write->wr_how_written);
3300 WRITEMEM(write->wr_verifier.data, NFS4_VERIFIER_SIZE);
3307 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
3308 struct nfsd4_exchange_id *exid)
3314 int server_scope_sz;
3315 uint64_t minor_id = 0;
3320 major_id = utsname()->nodename;
3321 major_id_sz = strlen(major_id);
3322 server_scope = utsname()->nodename;
3323 server_scope_sz = strlen(server_scope);
3326 8 /* eir_clientid */ +
3327 4 /* eir_sequenceid */ +
3329 4 /* spr_how (SP4_NONE) */ +
3330 8 /* so_minor_id */ +
3331 4 /* so_major_id.len */ +
3332 (XDR_QUADLEN(major_id_sz) * 4) +
3333 4 /* eir_server_scope.len */ +
3334 (XDR_QUADLEN(server_scope_sz) * 4) +
3335 4 /* eir_server_impl_id.count (0) */);
3337 WRITEMEM(&exid->clientid, 8);
3338 WRITE32(exid->seqid);
3339 WRITE32(exid->flags);
3341 /* state_protect4_r. Currently only support SP4_NONE */
3342 BUG_ON(exid->spa_how != SP4_NONE);
3343 WRITE32(exid->spa_how);
3345 /* The server_owner struct */
3346 WRITE64(minor_id); /* Minor id */
3348 WRITE32(major_id_sz);
3349 WRITEMEM(major_id, major_id_sz);
3352 WRITE32(server_scope_sz);
3353 WRITEMEM(server_scope, server_scope_sz);
3355 /* Implementation id */
3356 WRITE32(0); /* zero length nfs_impl_id4 array */
3362 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3363 struct nfsd4_create_session *sess)
3371 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3372 WRITE32(sess->seqid);
3373 WRITE32(sess->flags);
3377 WRITE32(0); /* headerpadsz */
3378 WRITE32(sess->fore_channel.maxreq_sz);
3379 WRITE32(sess->fore_channel.maxresp_sz);
3380 WRITE32(sess->fore_channel.maxresp_cached);
3381 WRITE32(sess->fore_channel.maxops);
3382 WRITE32(sess->fore_channel.maxreqs);
3383 WRITE32(sess->fore_channel.nr_rdma_attrs);
3386 if (sess->fore_channel.nr_rdma_attrs) {
3388 WRITE32(sess->fore_channel.rdma_attrs);
3393 WRITE32(0); /* headerpadsz */
3394 WRITE32(sess->back_channel.maxreq_sz);
3395 WRITE32(sess->back_channel.maxresp_sz);
3396 WRITE32(sess->back_channel.maxresp_cached);
3397 WRITE32(sess->back_channel.maxops);
3398 WRITE32(sess->back_channel.maxreqs);
3399 WRITE32(sess->back_channel.nr_rdma_attrs);
3402 if (sess->back_channel.nr_rdma_attrs) {
3404 WRITE32(sess->back_channel.rdma_attrs);
3411 nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, __be32 nfserr,
3412 struct nfsd4_destroy_session *destroy_session)
3418 nfsd4_encode_free_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3419 struct nfsd4_free_stateid *free_stateid)
3433 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
3434 struct nfsd4_sequence *seq)
3441 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20);
3442 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
3443 WRITE32(seq->seqid);
3444 WRITE32(seq->slotid);
3445 /* Note slotid's are numbered from zero: */
3446 WRITE32(seq->maxslots - 1); /* sr_highest_slotid */
3447 WRITE32(seq->maxslots - 1); /* sr_target_highest_slotid */
3448 WRITE32(seq->status_flags);
3451 resp->cstate.datap = p; /* DRC cache data pointer */
3456 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
3457 struct nfsd4_test_stateid *test_stateid)
3459 struct nfsd4_test_stateid_id *stateid, *next;
3462 RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
3463 *p++ = htonl(test_stateid->ts_num_ids);
3465 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
3466 *p++ = stateid->ts_id_status;
3474 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
3479 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
3482 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
3483 * since we don't need to filter out obsolete ops as this is
3484 * done in the decoding phase.
3486 static nfsd4_enc nfsd4_enc_ops[] = {
3487 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
3488 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
3489 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
3490 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
3491 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
3492 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3493 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
3494 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
3495 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
3496 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
3497 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
3498 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
3499 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
3500 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
3501 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3502 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
3503 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
3504 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
3505 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
3506 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
3507 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
3508 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
3509 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
3510 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
3511 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
3512 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
3513 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
3514 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
3515 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
3516 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
3517 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
3518 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
3519 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
3520 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
3521 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
3522 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
3523 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
3525 /* NFSv4.1 operations */
3526 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
3527 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
3528 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
3529 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
3530 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session,
3531 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_free_stateid,
3532 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3533 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
3534 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
3535 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
3536 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
3537 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
3538 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
3539 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
3540 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
3541 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
3542 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
3543 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
3544 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
3548 * Calculate the total amount of memory that the compound response has taken
3549 * after encoding the current operation with pad.
3551 * pad: if operation is non-idempotent, pad was calculate by op_rsize_bop()
3552 * which was specified at nfsd4_operation, else pad is zero.
3554 * Compare this length to the session se_fmaxresp_sz and se_fmaxresp_cached.
3556 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so
3557 * will be at least a page and will therefore hold the xdr_buf head.
3559 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 pad)
3561 struct xdr_buf *xb = &resp->rqstp->rq_res;
3562 struct nfsd4_session *session = NULL;
3563 struct nfsd4_slot *slot = resp->cstate.slot;
3564 u32 length, tlen = 0;
3566 if (!nfsd4_has_session(&resp->cstate))
3569 session = resp->cstate.session;
3570 if (session == NULL)
3573 if (xb->page_len == 0) {
3574 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad;
3576 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0)
3577 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base;
3579 length = xb->head[0].iov_len + xb->page_len + tlen + pad;
3581 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__,
3582 length, xb->page_len, tlen, pad);
3584 if (length > session->se_fchannel.maxresp_sz)
3585 return nfserr_rep_too_big;
3587 if ((slot->sl_flags & NFSD4_SLOT_CACHETHIS) &&
3588 length > session->se_fchannel.maxresp_cached)
3589 return nfserr_rep_too_big_to_cache;
3595 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3602 statp = p++; /* to be backfilled at the end */
3605 if (op->opnum == OP_ILLEGAL)
3607 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
3608 !nfsd4_enc_ops[op->opnum]);
3609 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u);
3610 /* nfsd4_check_drc_limit guarantees enough room for error status */
3612 op->status = nfsd4_check_resp_size(resp, 0);
3615 * Note: We write the status directly, instead of using WRITE32(),
3616 * since it is already in network byte order.
3618 *statp = op->status;
3622 * Encode the reply stored in the stateowner reply cache
3624 * XDR note: do not encode rp->rp_buflen: the buffer contains the
3625 * previously sent already encoded operation.
3627 * called with nfs4_lock_state() held
3630 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
3633 struct nfs4_replay *rp = op->replay;
3639 *p++ = rp->rp_status; /* already xdr'ed */
3642 RESERVE_SPACE(rp->rp_buflen);
3643 WRITEMEM(rp->rp_buf, rp->rp_buflen);
3648 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy)
3650 return xdr_ressize_check(rqstp, p);
3653 int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp)
3655 struct svc_rqst *rqstp = rq;
3656 struct nfsd4_compoundargs *args = rqstp->rq_argp;
3658 if (args->ops != args->iops) {
3660 args->ops = args->iops;
3664 while (args->to_free) {
3665 struct tmpbuf *tb = args->to_free;
3666 args->to_free = tb->next;
3667 tb->release(tb->buf);
3674 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args)
3677 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
3678 args->pagelist = rqstp->rq_arg.pages;
3679 args->pagelen = rqstp->rq_arg.page_len;
3681 args->to_free = NULL;
3682 args->ops = args->iops;
3683 args->rqstp = rqstp;
3685 return !nfsd4_decode_compound(args);
3689 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp)
3692 * All that remains is to write the tag and operation count...
3694 struct nfsd4_compound_state *cs = &resp->cstate;
3697 *p++ = htonl(resp->taglen);
3698 memcpy(p, resp->tag, resp->taglen);
3699 p += XDR_QUADLEN(resp->taglen);
3700 *p++ = htonl(resp->opcnt);
3702 if (rqstp->rq_res.page_len)
3703 iov = &rqstp->rq_res.tail[0];
3705 iov = &rqstp->rq_res.head[0];
3706 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
3707 BUG_ON(iov->iov_len > PAGE_SIZE);
3708 if (nfsd4_has_session(cs)) {
3709 if (cs->status != nfserr_replay_cache) {
3710 nfsd4_store_cache_entry(resp);
3711 cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE;
3713 /* Renew the clientid on success and on replay */
3714 release_session_client(cs->session);
3715 nfsd4_put_session(cs->session);