4 * Server-side XDR for NFSv4
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 * TODO: Neil Brown made the following observation: We currently
38 * initially reserve NFSD_BUFSIZE space on the transmit queue and
39 * never release any of that until the request is complete.
40 * It would be good to calculate a new maximum response size while
41 * decoding the COMPOUND, and call svc_reserve with this number
42 * at the end of nfs4svc_decode_compoundargs.
45 #include <linux/param.h>
46 #include <linux/smp.h>
47 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/vfs.h>
51 #include <linux/sunrpc/xdr.h>
52 #include <linux/sunrpc/svc.h>
53 #include <linux/sunrpc/clnt.h>
54 #include <linux/nfsd/nfsd.h>
55 #include <linux/nfsd/state.h>
56 #include <linux/nfsd/xdr4.h>
57 #include <linux/nfsd_idmap.h>
58 #include <linux/nfs4.h>
59 #include <linux/nfs4_acl.h>
61 #define NFSDDBG_FACILITY NFSDDBG_XDR
64 check_filename(char *str, int len, int err)
70 if (isdotent(str, len))
72 for (i = 0; i < len; i++)
79 * START OF "GENERIC" DECODE ROUTINES.
80 * These may look a little ugly since they are imported from a "generic"
81 * set of XDR encode/decode routines which are intended to be shared by
82 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
84 * If the pain of reading these is too great, it should be a straightforward
85 * task to translate them into Linux-specific versions which are more
86 * consistent with the style used in NFSv2/v3...
96 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
97 status = nfserr_bad_xdr; \
100 #define READ32(x) (x) = ntohl(*p++)
101 #define READ64(x) do { \
102 (x) = (u64)ntohl(*p++) << 32; \
103 (x) |= ntohl(*p++); \
105 #define READTIME(x) do { \
110 #define READMEM(x,nbytes) do { \
112 p += XDR_QUADLEN(nbytes); \
114 #define SAVEMEM(x,nbytes) do { \
115 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
116 savemem(argp, p, nbytes) : \
118 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
121 p += XDR_QUADLEN(nbytes); \
123 #define COPYMEM(x,nbytes) do { \
124 memcpy((x), p, nbytes); \
125 p += XDR_QUADLEN(nbytes); \
128 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
129 #define READ_BUF(nbytes) do { \
130 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
132 argp->p += XDR_QUADLEN(nbytes); \
133 } else if (!(p = read_buf(argp, nbytes))) { \
134 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
139 static u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
141 /* We want more bytes than seem to be available.
142 * Maybe we need a new page, maybe we have just run out
144 int avail = (char*)argp->end - (char*)argp->p;
146 if (avail + argp->pagelen < nbytes)
148 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
150 /* ok, we can do it with the current plus the next page */
151 if (nbytes <= sizeof(argp->tmp))
155 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
160 memcpy(p, argp->p, avail);
161 /* step to next page */
162 argp->p = page_address(argp->pagelist[0]);
164 if (argp->pagelen < PAGE_SIZE) {
165 argp->end = p + (argp->pagelen>>2);
168 argp->end = p + (PAGE_SIZE>>2);
169 argp->pagelen -= PAGE_SIZE;
171 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
172 argp->p += XDR_QUADLEN(nbytes - avail);
177 defer_free(struct nfsd4_compoundargs *argp,
178 void (*release)(const void *), void *p)
182 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
186 tb->release = release;
187 tb->next = argp->to_free;
192 static char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
195 if (p == argp->tmp) {
196 new = kmalloc(nbytes, GFP_KERNEL);
197 if (!new) return NULL;
199 memcpy(p, argp->tmp, nbytes);
201 BUG_ON(p != argp->tmpp);
204 if (defer_free(argp, kfree, p)) {
213 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
226 READ_BUF(bmlen << 2);
236 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
237 struct nfs4_acl **acl)
239 int expected_len, len = 0;
245 if ((status = nfsd4_decode_bitmap(argp, bmval)))
249 * According to spec, unsupported attributes return ERR_NOTSUPP;
250 * read-only attributes return ERR_INVAL.
252 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
253 return nfserr_attrnotsupp;
254 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
258 READ32(expected_len);
260 if (bmval[0] & FATTR4_WORD0_SIZE) {
263 READ64(iattr->ia_size);
264 iattr->ia_valid |= ATTR_SIZE;
266 if (bmval[0] & FATTR4_WORD0_ACL) {
270 READ_BUF(4); len += 4;
273 *acl = nfs4_acl_new();
278 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
280 for (i = 0; i < nace; i++) {
281 READ_BUF(16); len += 16;
284 READ32(ace.access_mask);
287 len += XDR_QUADLEN(dummy32) << 2;
288 READMEM(buf, dummy32);
289 ace.whotype = nfs4_acl_get_whotype(buf, dummy32);
291 if (ace.whotype != NFS4_ACL_WHO_NAMED)
293 else if (ace.flag & NFS4_ACE_IDENTIFIER_GROUP)
294 status = nfsd_map_name_to_gid(argp->rqstp,
295 buf, dummy32, &ace.who);
297 status = nfsd_map_name_to_uid(argp->rqstp,
298 buf, dummy32, &ace.who);
301 status = nfs4_acl_add_ace(*acl, ace.type, ace.flag,
302 ace.access_mask, ace.whotype, ace.who);
308 if (bmval[1] & FATTR4_WORD1_MODE) {
311 READ32(iattr->ia_mode);
312 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
313 iattr->ia_valid |= ATTR_MODE;
315 if (bmval[1] & FATTR4_WORD1_OWNER) {
320 len += (XDR_QUADLEN(dummy32) << 2);
321 READMEM(buf, dummy32);
322 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
324 iattr->ia_valid |= ATTR_UID;
326 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
331 len += (XDR_QUADLEN(dummy32) << 2);
332 READMEM(buf, dummy32);
333 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
335 iattr->ia_valid |= ATTR_GID;
337 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
342 case NFS4_SET_TO_CLIENT_TIME:
343 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
344 all 32 bits of 'nseconds'. */
350 READ32(iattr->ia_atime.tv_sec);
351 READ32(iattr->ia_atime.tv_nsec);
352 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
354 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
356 case NFS4_SET_TO_SERVER_TIME:
357 iattr->ia_valid |= ATTR_ATIME;
363 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
364 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
365 all 32 bits of 'nseconds'. */
371 READ32(iattr->ia_ctime.tv_sec);
372 READ32(iattr->ia_ctime.tv_nsec);
373 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
375 iattr->ia_valid |= ATTR_CTIME;
377 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
382 case NFS4_SET_TO_CLIENT_TIME:
383 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
384 all 32 bits of 'nseconds'. */
390 READ32(iattr->ia_mtime.tv_sec);
391 READ32(iattr->ia_mtime.tv_nsec);
392 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
394 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
396 case NFS4_SET_TO_SERVER_TIME:
397 iattr->ia_valid |= ATTR_MTIME;
403 if (len != expected_len)
409 status = nfserrno(status);
414 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
419 READ32(access->ac_req_access);
425 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
429 close->cl_stateowner = NULL;
430 READ_BUF(4 + sizeof(stateid_t));
431 READ32(close->cl_seqid);
432 READ32(close->cl_stateid.si_generation);
433 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
440 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
445 READ64(commit->co_offset);
446 READ32(commit->co_count);
452 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
457 READ32(create->cr_type);
458 switch (create->cr_type) {
461 READ32(create->cr_linklen);
462 READ_BUF(create->cr_linklen);
463 SAVEMEM(create->cr_linkname, create->cr_linklen);
468 READ32(create->cr_specdata1);
469 READ32(create->cr_specdata2);
479 READ32(create->cr_namelen);
480 READ_BUF(create->cr_namelen);
481 SAVEMEM(create->cr_name, create->cr_namelen);
482 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
485 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
492 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
496 READ_BUF(sizeof(stateid_t));
497 READ32(dr->dr_stateid.si_generation);
498 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
504 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
506 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
510 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
515 READ32(link->li_namelen);
516 READ_BUF(link->li_namelen);
517 SAVEMEM(link->li_name, link->li_namelen);
518 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
525 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
529 lock->lk_replay_owner = NULL;
531 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
534 READ32(lock->lk_type);
535 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
537 READ32(lock->lk_reclaim);
538 READ64(lock->lk_offset);
539 READ64(lock->lk_length);
540 READ32(lock->lk_is_new);
542 if (lock->lk_is_new) {
544 READ32(lock->lk_new_open_seqid);
545 READ32(lock->lk_new_open_stateid.si_generation);
547 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
548 READ32(lock->lk_new_lock_seqid);
549 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
550 READ32(lock->lk_new_owner.len);
551 READ_BUF(lock->lk_new_owner.len);
552 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
555 READ32(lock->lk_old_lock_stateid.si_generation);
556 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
557 READ32(lock->lk_old_lock_seqid);
564 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
569 READ32(lockt->lt_type);
570 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
572 READ64(lockt->lt_offset);
573 READ64(lockt->lt_length);
574 COPYMEM(&lockt->lt_clientid, 8);
575 READ32(lockt->lt_owner.len);
576 READ_BUF(lockt->lt_owner.len);
577 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
583 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
587 locku->lu_stateowner = NULL;
588 READ_BUF(24 + sizeof(stateid_t));
589 READ32(locku->lu_type);
590 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
592 READ32(locku->lu_seqid);
593 READ32(locku->lu_stateid.si_generation);
594 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
595 READ64(locku->lu_offset);
596 READ64(locku->lu_length);
602 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
607 READ32(lookup->lo_len);
608 READ_BUF(lookup->lo_len);
609 SAVEMEM(lookup->lo_name, lookup->lo_len);
610 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
617 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
621 memset(open->op_bmval, 0, sizeof(open->op_bmval));
622 open->op_iattr.ia_valid = 0;
623 open->op_stateowner = NULL;
625 /* seqid, share_access, share_deny, clientid, ownerlen */
626 READ_BUF(16 + sizeof(clientid_t));
627 READ32(open->op_seqid);
628 READ32(open->op_share_access);
629 READ32(open->op_share_deny);
630 COPYMEM(&open->op_clientid, sizeof(clientid_t));
631 READ32(open->op_owner.len);
633 /* owner, open_flag */
634 READ_BUF(open->op_owner.len + 4);
635 SAVEMEM(open->op_owner.data, open->op_owner.len);
636 READ32(open->op_create);
637 switch (open->op_create) {
638 case NFS4_OPEN_NOCREATE:
640 case NFS4_OPEN_CREATE:
642 READ32(open->op_createmode);
643 switch (open->op_createmode) {
644 case NFS4_CREATE_UNCHECKED:
645 case NFS4_CREATE_GUARDED:
646 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
649 case NFS4_CREATE_EXCLUSIVE:
651 COPYMEM(open->op_verf.data, 8);
663 READ32(open->op_claim_type);
664 switch (open->op_claim_type) {
665 case NFS4_OPEN_CLAIM_NULL:
666 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
668 READ32(open->op_fname.len);
669 READ_BUF(open->op_fname.len);
670 SAVEMEM(open->op_fname.data, open->op_fname.len);
671 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
674 case NFS4_OPEN_CLAIM_PREVIOUS:
676 READ32(open->op_delegate_type);
678 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
679 READ_BUF(sizeof(stateid_t) + 4);
680 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
681 READ32(open->op_fname.len);
682 READ_BUF(open->op_fname.len);
683 SAVEMEM(open->op_fname.data, open->op_fname.len);
684 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
695 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
699 open_conf->oc_stateowner = NULL;
700 READ_BUF(4 + sizeof(stateid_t));
701 READ32(open_conf->oc_req_stateid.si_generation);
702 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
703 READ32(open_conf->oc_seqid);
709 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
713 open_down->od_stateowner = NULL;
714 READ_BUF(12 + sizeof(stateid_t));
715 READ32(open_down->od_stateid.si_generation);
716 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
717 READ32(open_down->od_seqid);
718 READ32(open_down->od_share_access);
719 READ32(open_down->od_share_deny);
725 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
730 READ32(putfh->pf_fhlen);
731 if (putfh->pf_fhlen > NFS4_FHSIZE)
733 READ_BUF(putfh->pf_fhlen);
734 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
740 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
744 READ_BUF(sizeof(stateid_t) + 12);
745 READ32(read->rd_stateid.si_generation);
746 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
747 READ64(read->rd_offset);
748 READ32(read->rd_length);
754 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
759 READ64(readdir->rd_cookie);
760 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
761 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
762 READ32(readdir->rd_maxcount);
763 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
770 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
775 READ32(remove->rm_namelen);
776 READ_BUF(remove->rm_namelen);
777 SAVEMEM(remove->rm_name, remove->rm_namelen);
778 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
785 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
790 READ32(rename->rn_snamelen);
791 READ_BUF(rename->rn_snamelen + 4);
792 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
793 READ32(rename->rn_tnamelen);
794 READ_BUF(rename->rn_tnamelen);
795 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
796 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
798 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
805 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
809 READ_BUF(sizeof(clientid_t));
810 COPYMEM(clientid, sizeof(clientid_t));
816 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
820 READ_BUF(sizeof(stateid_t));
821 READ32(setattr->sa_stateid.si_generation);
822 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
823 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
830 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
835 COPYMEM(setclientid->se_verf.data, 8);
836 READ32(setclientid->se_namelen);
838 READ_BUF(setclientid->se_namelen + 8);
839 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
840 READ32(setclientid->se_callback_prog);
841 READ32(setclientid->se_callback_netid_len);
843 READ_BUF(setclientid->se_callback_netid_len + 4);
844 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
845 READ32(setclientid->se_callback_addr_len);
847 READ_BUF(setclientid->se_callback_addr_len + 4);
848 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
849 READ32(setclientid->se_callback_ident);
855 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
859 READ_BUF(8 + sizeof(nfs4_verifier));
860 COPYMEM(&scd_c->sc_clientid, 8);
861 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
866 /* Also used for NVERIFY */
868 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
871 struct nfsd4_compoundargs save = {
874 .rqstp = argp->rqstp,
877 struct iattr ve_iattr; /* request */
878 struct nfs4_acl *ve_acl; /* request */
882 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
885 /* For convenience's sake, we compare raw xdr'd attributes in
886 * nfsd4_proc_verify; however we still decode here just to return
887 * correct error in case of bad xdr. */
889 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
890 if (status == nfserr_inval) {
891 status = nfserrno(status);
896 READ32(verify->ve_attrlen);
897 READ_BUF(verify->ve_attrlen);
898 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
904 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
911 READ_BUF(sizeof(stateid_opaque_t) + 20);
912 READ32(write->wr_stateid.si_generation);
913 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
914 READ64(write->wr_offset);
915 READ32(write->wr_stable_how);
916 if (write->wr_stable_how > 2)
918 READ32(write->wr_buflen);
920 /* Sorry .. no magic macros for this.. *
921 * READ_BUF(write->wr_buflen);
922 * SAVEMEM(write->wr_buf, write->wr_buflen);
924 avail = (char*)argp->end - (char*)argp->p;
925 if (avail + argp->pagelen < write->wr_buflen) {
926 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
929 write->wr_vec[0].iov_base = p;
930 write->wr_vec[0].iov_len = avail;
932 len = write->wr_buflen;
933 while (len > write->wr_vec[v].iov_len) {
934 len -= write->wr_vec[v].iov_len;
936 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
938 if (argp->pagelen >= PAGE_SIZE) {
939 write->wr_vec[v].iov_len = PAGE_SIZE;
940 argp->pagelen -= PAGE_SIZE;
942 write->wr_vec[v].iov_len = argp->pagelen;
943 argp->pagelen -= len;
946 argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
947 argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
948 write->wr_vec[v].iov_len = len;
949 write->wr_vlen = v+1;
955 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
960 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
961 READ32(rlockowner->rl_owner.len);
962 READ_BUF(rlockowner->rl_owner.len);
963 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
969 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
976 * XXX: According to spec, we should check the tag
977 * for UTF-8 compliance. I'm postponing this for
978 * now because it seems that some clients do use
982 READ32(argp->taglen);
983 READ_BUF(argp->taglen + 8);
984 SAVEMEM(argp->tag, argp->taglen);
985 READ32(argp->minorversion);
988 if (argp->taglen > NFSD4_MAX_TAGLEN)
990 if (argp->opcnt > 100)
993 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
994 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
996 argp->ops = argp->iops;
997 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1002 for (i = 0; i < argp->opcnt; i++) {
1007 * We can't use READ_BUF() here because we need to handle
1008 * a missing opcode as an OP_WRITE + 1. So we need to check
1009 * to see if we're truly at the end of our buffer or if there
1010 * is another page we need to flip to.
1013 if (argp->p == argp->end) {
1014 if (argp->pagelen < 4) {
1015 /* There isn't an opcode still on the wire */
1016 op->opnum = OP_WRITE + 1;
1017 op->status = nfserr_bad_xdr;
1023 * False alarm. We just hit a page boundary, but there
1024 * is still data available. Move pointer across page
1025 * boundary. *snip from READ_BUF*
1027 argp->p = page_address(argp->pagelist[0]);
1029 if (argp->pagelen < PAGE_SIZE) {
1030 argp->end = p + (argp->pagelen>>2);
1033 argp->end = p + (PAGE_SIZE>>2);
1034 argp->pagelen -= PAGE_SIZE;
1037 op->opnum = ntohl(*argp->p++);
1039 switch (op->opnum) {
1040 case 2: /* Reserved operation */
1041 op->opnum = OP_ILLEGAL;
1042 if (argp->minorversion == 0)
1043 op->status = nfserr_op_illegal;
1045 op->status = nfserr_minor_vers_mismatch;
1048 op->status = nfsd4_decode_access(argp, &op->u.access);
1051 op->status = nfsd4_decode_close(argp, &op->u.close);
1054 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1057 op->status = nfsd4_decode_create(argp, &op->u.create);
1059 case OP_DELEGRETURN:
1060 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1063 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1066 op->status = nfs_ok;
1069 op->status = nfsd4_decode_link(argp, &op->u.link);
1072 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1075 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1078 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1081 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1084 op->status = nfs_ok;
1087 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1090 op->status = nfsd4_decode_open(argp, &op->u.open);
1092 case OP_OPEN_CONFIRM:
1093 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1095 case OP_OPEN_DOWNGRADE:
1096 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1099 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1102 op->status = nfs_ok;
1105 op->status = nfsd4_decode_read(argp, &op->u.read);
1108 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1111 op->status = nfs_ok;
1114 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1117 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1120 op->status = nfs_ok;
1123 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1126 op->status = nfs_ok;
1129 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1131 case OP_SETCLIENTID:
1132 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1134 case OP_SETCLIENTID_CONFIRM:
1135 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1138 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1141 op->status = nfsd4_decode_write(argp, &op->u.write);
1143 case OP_RELEASE_LOCKOWNER:
1144 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1147 op->opnum = OP_ILLEGAL;
1148 op->status = nfserr_op_illegal;
1161 * END OF "GENERIC" DECODE ROUTINES.
1165 * START OF "GENERIC" ENCODE ROUTINES.
1166 * These may look a little ugly since they are imported from a "generic"
1167 * set of XDR encode/decode routines which are intended to be shared by
1168 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1170 * If the pain of reading these is too great, it should be a straightforward
1171 * task to translate them into Linux-specific versions which are more
1172 * consistent with the style used in NFSv2/v3...
1174 #define ENCODE_HEAD u32 *p
1176 #define WRITE32(n) *p++ = htonl(n)
1177 #define WRITE64(n) do { \
1178 *p++ = htonl((u32)((n) >> 32)); \
1179 *p++ = htonl((u32)(n)); \
1181 #define WRITEMEM(ptr,nbytes) do { \
1182 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1183 memcpy(p, ptr, nbytes); \
1184 p += XDR_QUADLEN(nbytes); \
1186 #define WRITECINFO(c) do { \
1187 *p++ = htonl(c.atomic); \
1188 *p++ = htonl(c.before_ctime_sec); \
1189 *p++ = htonl(c.before_ctime_nsec); \
1190 *p++ = htonl(c.after_ctime_sec); \
1191 *p++ = htonl(c.after_ctime_nsec); \
1194 #define RESERVE_SPACE(nbytes) do { \
1196 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1198 #define ADJUST_ARGS() resp->p = p
1201 * Header routine to setup seqid operation replay cache
1203 #define ENCODE_SEQID_OP_HEAD \
1210 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This
1211 * is where sequence id's are incremented, and the replay cache is filled.
1212 * Note that we increment sequence id's here, at the last moment, so we're sure
1213 * we know whether the error to be returned is a sequence id mutating error.
1216 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1217 if (seqid_mutating_err(nfserr) && stateowner) { \
1218 stateowner->so_seqid++; \
1219 stateowner->so_replay.rp_status = nfserr; \
1220 stateowner->so_replay.rp_buflen = \
1221 (((char *)(resp)->p - (char *)save)); \
1222 memcpy(stateowner->so_replay.rp_buf, save, \
1223 stateowner->so_replay.rp_buflen); \
1227 static u32 nfs4_ftypes[16] = {
1228 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1229 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1230 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1231 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1235 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1236 u32 **p, int *buflen)
1240 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1241 return nfserr_resource;
1242 if (whotype != NFS4_ACL_WHO_NAMED)
1243 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1245 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1247 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1249 return nfserrno(status);
1250 *p = xdr_encode_opaque(*p, NULL, status);
1251 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1252 BUG_ON(*buflen < 0);
1257 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1259 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1263 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1265 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1269 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1270 u32 **p, int *buflen)
1272 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1277 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1280 * @countp is the buffer size in _words_; upon successful return this becomes
1281 * replaced with the number of words written.
1284 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1285 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1286 struct svc_rqst *rqstp)
1288 u32 bmval0 = bmval[0];
1289 u32 bmval1 = bmval[1];
1291 struct svc_fh tempfh;
1292 struct kstatfs statfs;
1293 int buflen = *countp << 2;
1300 struct nfs4_acl *acl = NULL;
1302 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1303 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1304 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1306 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1309 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1310 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1311 FATTR4_WORD1_SPACE_TOTAL))) {
1312 status = vfs_statfs(dentry, &statfs);
1316 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1317 fh_init(&tempfh, NFS4_FHSIZE);
1318 status = fh_compose(&tempfh, exp, dentry, NULL);
1323 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1324 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1325 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1326 aclsupport = (status == 0);
1327 if (bmval0 & FATTR4_WORD0_ACL) {
1328 if (status == -EOPNOTSUPP)
1329 bmval0 &= ~FATTR4_WORD0_ACL;
1330 else if (status == -EINVAL) {
1331 status = nfserr_attrnotsupp;
1333 } else if (status != 0)
1337 if ((buflen -= 16) < 0)
1343 attrlenp = p++; /* to be backfilled later */
1345 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1346 if ((buflen -= 12) < 0)
1349 WRITE32(aclsupport ?
1350 NFSD_SUPPORTED_ATTRS_WORD0 :
1351 NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1352 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1354 if (bmval0 & FATTR4_WORD0_TYPE) {
1355 if ((buflen -= 4) < 0)
1357 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1358 if (dummy == NF4BAD)
1359 goto out_serverfault;
1362 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1363 if ((buflen -= 4) < 0)
1365 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
1366 WRITE32(NFS4_FH_PERSISTENT);
1368 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME);
1370 if (bmval0 & FATTR4_WORD0_CHANGE) {
1372 * Note: This _must_ be consistent with the scheme for writing
1373 * change_info, so any changes made here must be reflected there
1374 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1377 if ((buflen -= 8) < 0)
1379 WRITE32(stat.ctime.tv_sec);
1380 WRITE32(stat.ctime.tv_nsec);
1382 if (bmval0 & FATTR4_WORD0_SIZE) {
1383 if ((buflen -= 8) < 0)
1387 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1388 if ((buflen -= 4) < 0)
1392 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1393 if ((buflen -= 4) < 0)
1397 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1398 if ((buflen -= 4) < 0)
1402 if (bmval0 & FATTR4_WORD0_FSID) {
1403 if ((buflen -= 16) < 0)
1405 if (is_fsid(fhp, rqstp->rq_reffh)) {
1406 WRITE64((u64)exp->ex_fsid);
1410 WRITE32(MAJOR(stat.dev));
1412 WRITE32(MINOR(stat.dev));
1415 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1416 if ((buflen -= 4) < 0)
1420 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1421 if ((buflen -= 4) < 0)
1423 WRITE32(NFSD_LEASE_TIME);
1425 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1426 if ((buflen -= 4) < 0)
1430 if (bmval0 & FATTR4_WORD0_ACL) {
1431 struct nfs4_ace *ace;
1432 struct list_head *h;
1435 if ((buflen -= 4) < 0)
1441 if ((buflen -= 4) < 0)
1443 WRITE32(acl->naces);
1445 list_for_each(h, &acl->ace_head) {
1446 ace = list_entry(h, struct nfs4_ace, l_ace);
1448 if ((buflen -= 4*3) < 0)
1452 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1453 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1454 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1456 if (status == nfserr_resource)
1463 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1464 if ((buflen -= 4) < 0)
1466 WRITE32(aclsupport ?
1467 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1469 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1470 if ((buflen -= 4) < 0)
1474 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1475 if ((buflen -= 4) < 0)
1479 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1480 if ((buflen -= 4) < 0)
1484 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1485 if ((buflen -= 4) < 0)
1489 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1490 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1493 WRITE32(fhp->fh_handle.fh_size);
1494 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1496 if (bmval0 & FATTR4_WORD0_FILEID) {
1497 if ((buflen -= 8) < 0)
1499 WRITE64((u64) stat.ino);
1501 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1502 if ((buflen -= 8) < 0)
1504 WRITE64((u64) statfs.f_ffree);
1506 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1507 if ((buflen -= 8) < 0)
1509 WRITE64((u64) statfs.f_ffree);
1511 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1512 if ((buflen -= 8) < 0)
1514 WRITE64((u64) statfs.f_files);
1516 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1517 if ((buflen -= 4) < 0)
1521 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1522 if ((buflen -= 8) < 0)
1526 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1527 if ((buflen -= 4) < 0)
1531 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1532 if ((buflen -= 4) < 0)
1536 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1537 if ((buflen -= 8) < 0)
1539 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1541 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1542 if ((buflen -= 8) < 0)
1544 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1546 if (bmval1 & FATTR4_WORD1_MODE) {
1547 if ((buflen -= 4) < 0)
1549 WRITE32(stat.mode & S_IALLUGO);
1551 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1552 if ((buflen -= 4) < 0)
1556 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1557 if ((buflen -= 4) < 0)
1559 WRITE32(stat.nlink);
1561 if (bmval1 & FATTR4_WORD1_OWNER) {
1562 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen);
1563 if (status == nfserr_resource)
1568 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1569 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen);
1570 if (status == nfserr_resource)
1575 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1576 if ((buflen -= 8) < 0)
1578 WRITE32((u32) MAJOR(stat.rdev));
1579 WRITE32((u32) MINOR(stat.rdev));
1581 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1582 if ((buflen -= 8) < 0)
1584 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1587 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1588 if ((buflen -= 8) < 0)
1590 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1593 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1594 if ((buflen -= 8) < 0)
1596 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1599 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1600 if ((buflen -= 8) < 0)
1602 dummy64 = (u64)stat.blocks << 9;
1605 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1606 if ((buflen -= 12) < 0)
1609 WRITE32(stat.atime.tv_sec);
1610 WRITE32(stat.atime.tv_nsec);
1612 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1613 if ((buflen -= 12) < 0)
1619 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1620 if ((buflen -= 12) < 0)
1623 WRITE32(stat.ctime.tv_sec);
1624 WRITE32(stat.ctime.tv_nsec);
1626 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1627 if ((buflen -= 12) < 0)
1630 WRITE32(stat.mtime.tv_sec);
1631 WRITE32(stat.mtime.tv_nsec);
1633 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1634 struct dentry *mnt_pnt, *mnt_root;
1636 if ((buflen -= 8) < 0)
1638 mnt_root = exp->ex_mnt->mnt_root;
1639 if (mnt_root->d_inode == dentry->d_inode) {
1640 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1641 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1643 WRITE64((u64) stat.ino);
1645 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1646 *countp = p - buffer;
1655 status = nfserrno(status);
1659 status = nfserr_resource;
1662 status = nfserr_serverfault;
1667 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1668 const char *name, int namlen, u32 *p, int *buflen)
1670 struct svc_export *exp = cd->rd_fhp->fh_export;
1671 struct dentry *dentry;
1674 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1676 return nfserrno(PTR_ERR(dentry));
1679 if (d_mountpoint(dentry)) {
1680 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1682 * -EAGAIN is the only error returned from
1683 * nfsd_cross_mnt() and it indicates that an
1684 * up-call has been initiated to fill in the export
1685 * options on exp. When the answer comes back,
1686 * this call will be retried.
1688 nfserr = nfserr_dropit;
1693 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1702 nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
1709 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1710 *p++ = htonl(0); /* bmval1 */
1713 *p++ = nfserr; /* no htonl */
1714 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1719 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1720 loff_t offset, ino_t ino, unsigned int d_type)
1722 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1724 u32 *p = cd->buffer;
1725 int nfserr = nfserr_toosmall;
1727 /* In nfsv4, "." and ".." never make it onto the wire.. */
1728 if (name && isdotent(name, namlen)) {
1729 cd->common.err = nfs_ok;
1734 xdr_encode_hyper(cd->offset, (u64) offset);
1736 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1740 *p++ = xdr_one; /* mark entry present */
1741 cd->offset = p; /* remember pointer */
1742 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1743 p = xdr_encode_array(p, name, namlen); /* name length & name */
1745 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1750 case nfserr_resource:
1751 nfserr = nfserr_toosmall;
1757 * If the client requested the RDATTR_ERROR attribute,
1758 * we stuff the error code into this attribute
1759 * and continue. If this attribute was not requested,
1760 * then in accordance with the spec, we fail the
1761 * entire READDIR operation(!)
1763 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1765 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1767 nfserr = nfserr_toosmall;
1771 cd->buflen -= (p - cd->buffer);
1773 cd->common.err = nfs_ok;
1776 cd->common.err = nfserr;
1781 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1787 WRITE32(access->ac_supported);
1788 WRITE32(access->ac_resp_access);
1794 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1796 ENCODE_SEQID_OP_HEAD;
1799 RESERVE_SPACE(sizeof(stateid_t));
1800 WRITE32(close->cl_stateid.si_generation);
1801 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1804 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1809 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1815 WRITEMEM(commit->co_verf.data, 8);
1821 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1827 WRITECINFO(create->cr_cinfo);
1829 WRITE32(create->cr_bmval[0]);
1830 WRITE32(create->cr_bmval[1]);
1836 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1838 struct svc_fh *fhp = getattr->ga_fhp;
1844 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1845 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1846 resp->p, &buflen, getattr->ga_bmval,
1855 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1861 len = fhp->fh_handle.fh_size;
1862 RESERVE_SPACE(len + 4);
1864 WRITEMEM(&fhp->fh_handle.fh_base, len);
1870 * Including all fields other than the name, a LOCK4denied structure requires
1871 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1874 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1878 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
1879 WRITE64(ld->ld_start);
1880 WRITE64(ld->ld_length);
1881 WRITE32(ld->ld_type);
1883 WRITEMEM(&ld->ld_clientid, 8);
1884 WRITE32(ld->ld_sop->so_owner.len);
1885 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
1886 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
1887 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
1888 WRITE64((u64)0); /* clientid */
1889 WRITE32(0); /* length of owner name */
1895 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
1897 ENCODE_SEQID_OP_HEAD;
1900 RESERVE_SPACE(4 + sizeof(stateid_t));
1901 WRITE32(lock->lk_resp_stateid.si_generation);
1902 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
1904 } else if (nfserr == nfserr_denied)
1905 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
1907 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner);
1911 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
1913 if (nfserr == nfserr_denied)
1914 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
1918 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
1920 ENCODE_SEQID_OP_HEAD;
1923 RESERVE_SPACE(sizeof(stateid_t));
1924 WRITE32(locku->lu_stateid.si_generation);
1925 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
1929 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
1934 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
1940 WRITECINFO(link->li_cinfo);
1947 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
1949 ENCODE_SEQID_OP_HEAD;
1954 RESERVE_SPACE(36 + sizeof(stateid_t));
1955 WRITE32(open->op_stateid.si_generation);
1956 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
1957 WRITECINFO(open->op_cinfo);
1958 WRITE32(open->op_rflags);
1960 WRITE32(open->op_bmval[0]);
1961 WRITE32(open->op_bmval[1]);
1962 WRITE32(open->op_delegate_type);
1965 switch (open->op_delegate_type) {
1966 case NFS4_OPEN_DELEGATE_NONE:
1968 case NFS4_OPEN_DELEGATE_READ:
1969 RESERVE_SPACE(20 + sizeof(stateid_t));
1970 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1971 WRITE32(open->op_recall);
1974 * TODO: ACE's in delegations
1976 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1979 WRITE32(0); /* XXX: is NULL principal ok? */
1982 case NFS4_OPEN_DELEGATE_WRITE:
1983 RESERVE_SPACE(32 + sizeof(stateid_t));
1984 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1988 * TODO: space_limit's in delegations
1990 WRITE32(NFS4_LIMIT_SIZE);
1995 * TODO: ACE's in delegations
1997 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2000 WRITE32(0); /* XXX: is NULL principal ok? */
2006 /* XXX save filehandle here */
2008 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2012 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2014 ENCODE_SEQID_OP_HEAD;
2017 RESERVE_SPACE(sizeof(stateid_t));
2018 WRITE32(oc->oc_resp_stateid.si_generation);
2019 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2023 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2027 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2029 ENCODE_SEQID_OP_HEAD;
2032 RESERVE_SPACE(sizeof(stateid_t));
2033 WRITE32(od->od_stateid.si_generation);
2034 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2038 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2042 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2046 unsigned long maxcount;
2052 if (resp->xbuf->page_len)
2053 return nfserr_resource;
2055 RESERVE_SPACE(8); /* eof flag and byte count */
2057 maxcount = NFSSVC_MAXBLKSIZE;
2058 if (maxcount > read->rd_length)
2059 maxcount = read->rd_length;
2064 pn = resp->rqstp->rq_resused;
2065 svc_take_page(resp->rqstp);
2066 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2067 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2073 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2074 read->rd_offset, read->rd_iov, read->rd_vlen,
2077 if (nfserr == nfserr_symlink)
2078 nfserr = nfserr_inval;
2081 eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2086 resp->xbuf->head[0].iov_len = (char*)p
2087 - (char*)resp->xbuf->head[0].iov_base;
2088 resp->xbuf->page_len = maxcount;
2090 /* Use rest of head for padding and remaining ops: */
2091 resp->rqstp->rq_restailpage = 0;
2092 resp->xbuf->tail[0].iov_base = p;
2093 resp->xbuf->tail[0].iov_len = 0;
2097 resp->xbuf->tail[0].iov_base += maxcount&3;
2098 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2105 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2113 if (resp->xbuf->page_len)
2114 return nfserr_resource;
2116 svc_take_page(resp->rqstp);
2117 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2119 maxcount = PAGE_SIZE;
2123 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2124 * if they would overflow the buffer. Is this kosher in NFSv4? If
2125 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2126 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2128 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2129 if (nfserr == nfserr_isdir)
2130 return nfserr_inval;
2136 resp->xbuf->head[0].iov_len = (char*)p
2137 - (char*)resp->xbuf->head[0].iov_base;
2138 resp->xbuf->page_len = maxcount;
2140 /* Use rest of head for padding and remaining ops: */
2141 resp->rqstp->rq_restailpage = 0;
2142 resp->xbuf->tail[0].iov_base = p;
2143 resp->xbuf->tail[0].iov_len = 0;
2147 resp->xbuf->tail[0].iov_base += maxcount&3;
2148 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2155 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2159 u32 *page, *savep, *tailbase;
2164 if (resp->xbuf->page_len)
2165 return nfserr_resource;
2167 RESERVE_SPACE(8); /* verifier */
2170 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2174 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2177 maxcount = PAGE_SIZE;
2178 if (maxcount > readdir->rd_maxcount)
2179 maxcount = readdir->rd_maxcount;
2182 * Convert from bytes to words, account for the two words already
2183 * written, make sure to leave two words at the end for the next
2184 * pointer and eof field.
2186 maxcount = (maxcount >> 2) - 4;
2188 nfserr = nfserr_toosmall;
2192 svc_take_page(resp->rqstp);
2193 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2194 readdir->common.err = 0;
2195 readdir->buflen = maxcount;
2196 readdir->buffer = page;
2197 readdir->offset = NULL;
2199 offset = readdir->rd_cookie;
2200 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2202 &readdir->common, nfsd4_encode_dirent);
2203 if (nfserr == nfs_ok &&
2204 readdir->common.err == nfserr_toosmall &&
2205 readdir->buffer == page)
2206 nfserr = nfserr_toosmall;
2207 if (nfserr == nfserr_symlink)
2208 nfserr = nfserr_notdir;
2212 if (readdir->offset)
2213 xdr_encode_hyper(readdir->offset, offset);
2215 p = readdir->buffer;
2216 *p++ = 0; /* no more entries */
2217 *p++ = htonl(readdir->common.err == nfserr_eof);
2218 resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2220 /* Use rest of head for padding and remaining ops: */
2221 resp->rqstp->rq_restailpage = 0;
2222 resp->xbuf->tail[0].iov_base = tailbase;
2223 resp->xbuf->tail[0].iov_len = 0;
2224 resp->p = resp->xbuf->tail[0].iov_base;
2225 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4;
2235 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2241 WRITECINFO(remove->rm_cinfo);
2247 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2253 WRITECINFO(rename->rn_sinfo);
2254 WRITECINFO(rename->rn_tinfo);
2260 * The SETATTR encode routine is special -- it always encodes a bitmap,
2261 * regardless of the error status.
2264 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2276 WRITE32(setattr->sa_bmval[0]);
2277 WRITE32(setattr->sa_bmval[1]);
2283 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2288 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2289 WRITEMEM(&scd->se_clientid, 8);
2290 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2293 else if (nfserr == nfserr_clid_inuse) {
2302 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2308 WRITE32(write->wr_bytes_written);
2309 WRITE32(write->wr_how_written);
2310 WRITEMEM(write->wr_verifier.data, 8);
2316 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2323 statp = p++; /* to be backfilled at the end */
2326 switch (op->opnum) {
2328 nfsd4_encode_access(resp, op->status, &op->u.access);
2331 nfsd4_encode_close(resp, op->status, &op->u.close);
2334 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2337 nfsd4_encode_create(resp, op->status, &op->u.create);
2339 case OP_DELEGRETURN:
2342 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2345 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2348 nfsd4_encode_link(resp, op->status, &op->u.link);
2351 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2354 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2357 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2366 nfsd4_encode_open(resp, op->status, &op->u.open);
2368 case OP_OPEN_CONFIRM:
2369 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2371 case OP_OPEN_DOWNGRADE:
2372 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2379 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2382 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2385 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2388 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2391 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2400 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2402 case OP_SETCLIENTID:
2403 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2405 case OP_SETCLIENTID_CONFIRM:
2410 nfsd4_encode_write(resp, op->status, &op->u.write);
2412 case OP_RELEASE_LOCKOWNER:
2419 * Note: We write the status directly, instead of using WRITE32(),
2420 * since it is already in network byte order.
2422 *statp = op->status;
2426 * Encode the reply stored in the stateowner reply cache
2428 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2429 * previously sent already encoded operation.
2431 * called with nfs4_lock_state() held
2434 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2437 struct nfs4_replay *rp = op->replay;
2443 *p++ = rp->rp_status; /* already xdr'ed */
2446 RESERVE_SPACE(rp->rp_buflen);
2447 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2452 * END OF "GENERIC" ENCODE ROUTINES.
2456 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2458 return xdr_ressize_check(rqstp, p);
2461 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2463 if (args->ops != args->iops) {
2465 args->ops = args->iops;
2469 while (args->to_free) {
2470 struct tmpbuf *tb = args->to_free;
2471 args->to_free = tb->next;
2472 tb->release(tb->buf);
2478 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2483 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2484 args->pagelist = rqstp->rq_arg.pages;
2485 args->pagelen = rqstp->rq_arg.page_len;
2487 args->to_free = NULL;
2488 args->ops = args->iops;
2489 args->rqstp = rqstp;
2491 status = nfsd4_decode_compound(args);
2493 nfsd4_release_compoundargs(args);
2499 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2502 * All that remains is to write the tag and operation count...
2506 *p++ = htonl(resp->taglen);
2507 memcpy(p, resp->tag, resp->taglen);
2508 p += XDR_QUADLEN(resp->taglen);
2509 *p++ = htonl(resp->opcnt);
2511 if (rqstp->rq_res.page_len)
2512 iov = &rqstp->rq_res.tail[0];
2514 iov = &rqstp->rq_res.head[0];
2515 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2516 BUG_ON(iov->iov_len > PAGE_SIZE);