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>
60 #include <linux/vserver/xid.h>
62 #define NFSDDBG_FACILITY NFSDDBG_XDR
65 check_filename(char *str, int len, int err)
71 if (isdotent(str, len))
73 for (i = 0; i < len; i++)
80 * START OF "GENERIC" DECODE ROUTINES.
81 * These may look a little ugly since they are imported from a "generic"
82 * set of XDR encode/decode routines which are intended to be shared by
83 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
85 * If the pain of reading these is too great, it should be a straightforward
86 * task to translate them into Linux-specific versions which are more
87 * consistent with the style used in NFSv2/v3...
97 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
98 status = nfserr_bad_xdr; \
101 #define READ32(x) (x) = ntohl(*p++)
102 #define READ64(x) do { \
103 (x) = (u64)ntohl(*p++) << 32; \
104 (x) |= ntohl(*p++); \
106 #define READTIME(x) do { \
111 #define READMEM(x,nbytes) do { \
113 p += XDR_QUADLEN(nbytes); \
115 #define SAVEMEM(x,nbytes) do { \
116 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
117 savemem(argp, p, nbytes) : \
119 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
122 p += XDR_QUADLEN(nbytes); \
124 #define COPYMEM(x,nbytes) do { \
125 memcpy((x), p, nbytes); \
126 p += XDR_QUADLEN(nbytes); \
129 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
130 #define READ_BUF(nbytes) do { \
131 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
133 argp->p += XDR_QUADLEN(nbytes); \
134 } else if (!(p = read_buf(argp, nbytes))) { \
135 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
140 u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
142 /* We want more bytes than seem to be available.
143 * Maybe we need a new page, maybe we have just run out
145 int avail = (char*)argp->end - (char*)argp->p;
147 if (avail + argp->pagelen < nbytes)
149 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
151 /* ok, we can do it with the current plus the next page */
152 if (nbytes <= sizeof(argp->tmp))
157 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
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 = p + (argp->pagelen>>2);
170 argp->end = 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);
179 defer_free(struct nfsd4_compoundargs *argp,
180 void (*release)(const void *), void *p)
184 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
188 tb->release = release;
189 tb->next = argp->to_free;
194 char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
197 if (p == argp->tmp) {
198 new = kmalloc(nbytes, GFP_KERNEL);
199 if (!new) return NULL;
201 memcpy(p, argp->tmp, nbytes);
207 if (defer_free(argp, kfree, p)) {
216 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
229 READ_BUF(bmlen << 2);
239 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr,
240 struct nfs4_acl **acl)
242 int expected_len, len = 0;
248 if ((status = nfsd4_decode_bitmap(argp, bmval)))
252 * According to spec, unsupported attributes return ERR_NOTSUPP;
253 * read-only attributes return ERR_INVAL.
255 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
256 return nfserr_attrnotsupp;
257 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
261 READ32(expected_len);
263 if (bmval[0] & FATTR4_WORD0_SIZE) {
266 READ64(iattr->ia_size);
267 iattr->ia_valid |= ATTR_SIZE;
269 if (bmval[0] & FATTR4_WORD0_ACL) {
273 READ_BUF(4); len += 4;
276 *acl = nfs4_acl_new();
281 defer_free(argp, (void (*)(const void *))nfs4_acl_free, *acl);
283 for (i = 0; i < nace; i++) {
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);
304 if (nfs4_acl_add_ace(*acl, ace.type, ace.flag,
305 ace.access_mask, ace.whotype, ace.who) != 0) {
312 if (bmval[1] & FATTR4_WORD1_MODE) {
315 READ32(iattr->ia_mode);
316 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
317 iattr->ia_valid |= ATTR_MODE;
319 if (bmval[1] & FATTR4_WORD1_OWNER) {
324 len += (XDR_QUADLEN(dummy32) << 2);
325 READMEM(buf, dummy32);
326 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
328 iattr->ia_valid |= ATTR_UID;
330 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
335 len += (XDR_QUADLEN(dummy32) << 2);
336 READMEM(buf, dummy32);
337 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
339 iattr->ia_valid |= ATTR_GID;
341 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
346 case NFS4_SET_TO_CLIENT_TIME:
347 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
348 all 32 bits of 'nseconds'. */
354 READ32(iattr->ia_atime.tv_sec);
355 READ32(iattr->ia_atime.tv_nsec);
356 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
358 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
360 case NFS4_SET_TO_SERVER_TIME:
361 iattr->ia_valid |= ATTR_ATIME;
367 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
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_ctime.tv_sec);
376 READ32(iattr->ia_ctime.tv_nsec);
377 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
379 iattr->ia_valid |= ATTR_CTIME;
381 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
386 case NFS4_SET_TO_CLIENT_TIME:
387 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
388 all 32 bits of 'nseconds'. */
394 READ32(iattr->ia_mtime.tv_sec);
395 READ32(iattr->ia_mtime.tv_nsec);
396 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
398 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
400 case NFS4_SET_TO_SERVER_TIME:
401 iattr->ia_valid |= ATTR_MTIME;
407 if (len != expected_len)
413 status = nfserrno(status);
418 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
423 READ32(access->ac_req_access);
429 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
433 close->cl_stateowner = NULL;
434 READ_BUF(4 + sizeof(stateid_t));
435 READ32(close->cl_seqid);
436 READ32(close->cl_stateid.si_generation);
437 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
444 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
449 READ64(commit->co_offset);
450 READ32(commit->co_count);
456 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
461 READ32(create->cr_type);
462 switch (create->cr_type) {
465 READ32(create->cr_linklen);
466 READ_BUF(create->cr_linklen);
467 SAVEMEM(create->cr_linkname, create->cr_linklen);
472 READ32(create->cr_specdata1);
473 READ32(create->cr_specdata2);
483 READ32(create->cr_namelen);
484 READ_BUF(create->cr_namelen);
485 SAVEMEM(create->cr_name, create->cr_namelen);
486 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
489 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, &create->cr_acl)))
496 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
500 READ_BUF(sizeof(stateid_t));
501 READ32(dr->dr_stateid.si_generation);
502 COPYMEM(&dr->dr_stateid.si_opaque, sizeof(stateid_opaque_t));
508 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
510 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
514 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
519 READ32(link->li_namelen);
520 READ_BUF(link->li_namelen);
521 SAVEMEM(link->li_name, link->li_namelen);
522 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
529 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
533 lock->lk_stateowner = NULL;
535 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
538 READ32(lock->lk_type);
539 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
541 READ32(lock->lk_reclaim);
542 READ64(lock->lk_offset);
543 READ64(lock->lk_length);
544 READ32(lock->lk_is_new);
546 if (lock->lk_is_new) {
548 READ32(lock->lk_new_open_seqid);
549 READ32(lock->lk_new_open_stateid.si_generation);
551 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
552 READ32(lock->lk_new_lock_seqid);
553 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
554 READ32(lock->lk_new_owner.len);
555 READ_BUF(lock->lk_new_owner.len);
556 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
559 READ32(lock->lk_old_lock_stateid.si_generation);
560 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
561 READ32(lock->lk_old_lock_seqid);
568 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
573 READ32(lockt->lt_type);
574 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
576 READ64(lockt->lt_offset);
577 READ64(lockt->lt_length);
578 COPYMEM(&lockt->lt_clientid, 8);
579 READ32(lockt->lt_owner.len);
580 READ_BUF(lockt->lt_owner.len);
581 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
587 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
591 locku->lu_stateowner = NULL;
592 READ_BUF(24 + sizeof(stateid_t));
593 READ32(locku->lu_type);
594 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
596 READ32(locku->lu_seqid);
597 READ32(locku->lu_stateid.si_generation);
598 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
599 READ64(locku->lu_offset);
600 READ64(locku->lu_length);
606 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
611 READ32(lookup->lo_len);
612 READ_BUF(lookup->lo_len);
613 SAVEMEM(lookup->lo_name, lookup->lo_len);
614 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
621 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
625 memset(open->op_bmval, 0, sizeof(open->op_bmval));
626 open->op_iattr.ia_valid = 0;
627 open->op_stateowner = NULL;
629 /* seqid, share_access, share_deny, clientid, ownerlen */
630 READ_BUF(16 + sizeof(clientid_t));
631 READ32(open->op_seqid);
632 READ32(open->op_share_access);
633 READ32(open->op_share_deny);
634 COPYMEM(&open->op_clientid, sizeof(clientid_t));
635 READ32(open->op_owner.len);
637 /* owner, open_flag */
638 READ_BUF(open->op_owner.len + 4);
639 SAVEMEM(open->op_owner.data, open->op_owner.len);
640 READ32(open->op_create);
641 switch (open->op_create) {
642 case NFS4_OPEN_NOCREATE:
644 case NFS4_OPEN_CREATE:
646 READ32(open->op_createmode);
647 switch (open->op_createmode) {
648 case NFS4_CREATE_UNCHECKED:
649 case NFS4_CREATE_GUARDED:
650 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr, &open->op_acl)))
653 case NFS4_CREATE_EXCLUSIVE:
655 COPYMEM(open->op_verf.data, 8);
667 READ32(open->op_claim_type);
668 switch (open->op_claim_type) {
669 case NFS4_OPEN_CLAIM_NULL:
670 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
672 READ32(open->op_fname.len);
673 READ_BUF(open->op_fname.len);
674 SAVEMEM(open->op_fname.data, open->op_fname.len);
675 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
678 case NFS4_OPEN_CLAIM_PREVIOUS:
680 READ32(open->op_delegate_type);
682 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
683 READ_BUF(sizeof(stateid_t) + 4);
684 COPYMEM(&open->op_delegate_stateid, sizeof(stateid_t));
685 READ32(open->op_fname.len);
686 READ_BUF(open->op_fname.len);
687 SAVEMEM(open->op_fname.data, open->op_fname.len);
688 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
699 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
703 open_conf->oc_stateowner = NULL;
704 READ_BUF(4 + sizeof(stateid_t));
705 READ32(open_conf->oc_req_stateid.si_generation);
706 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
707 READ32(open_conf->oc_seqid);
713 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
717 open_down->od_stateowner = NULL;
718 READ_BUF(12 + sizeof(stateid_t));
719 READ32(open_down->od_stateid.si_generation);
720 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
721 READ32(open_down->od_seqid);
722 READ32(open_down->od_share_access);
723 READ32(open_down->od_share_deny);
729 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
734 READ32(putfh->pf_fhlen);
735 if (putfh->pf_fhlen > NFS4_FHSIZE)
737 READ_BUF(putfh->pf_fhlen);
738 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
744 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
748 READ_BUF(sizeof(stateid_t) + 12);
749 READ32(read->rd_stateid.si_generation);
750 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
751 READ64(read->rd_offset);
752 READ32(read->rd_length);
758 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
763 READ64(readdir->rd_cookie);
764 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
765 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
766 READ32(readdir->rd_maxcount);
767 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
774 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
779 READ32(remove->rm_namelen);
780 READ_BUF(remove->rm_namelen);
781 SAVEMEM(remove->rm_name, remove->rm_namelen);
782 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
789 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
794 READ32(rename->rn_snamelen);
795 READ_BUF(rename->rn_snamelen + 4);
796 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
797 READ32(rename->rn_tnamelen);
798 READ_BUF(rename->rn_tnamelen);
799 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
800 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
802 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
809 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
813 READ_BUF(sizeof(clientid_t));
814 COPYMEM(clientid, sizeof(clientid_t));
820 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
824 READ_BUF(sizeof(stateid_t));
825 READ32(setattr->sa_stateid.si_generation);
826 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
827 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, &setattr->sa_acl)))
834 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
839 COPYMEM(setclientid->se_verf.data, 8);
840 READ32(setclientid->se_namelen);
842 READ_BUF(setclientid->se_namelen + 8);
843 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
844 READ32(setclientid->se_callback_prog);
845 READ32(setclientid->se_callback_netid_len);
847 READ_BUF(setclientid->se_callback_netid_len + 4);
848 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
849 READ32(setclientid->se_callback_addr_len);
851 READ_BUF(setclientid->se_callback_addr_len + 4);
852 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
853 READ32(setclientid->se_callback_ident);
859 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
863 READ_BUF(8 + sizeof(nfs4_verifier));
864 COPYMEM(&scd_c->sc_clientid, 8);
865 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
870 /* Also used for NVERIFY */
872 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
875 struct nfsd4_compoundargs save = {
878 .rqstp = argp->rqstp,
881 struct iattr ve_iattr; /* request */
882 struct nfs4_acl *ve_acl; /* request */
886 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
889 /* For convenience's sake, we compare raw xdr'd attributes in
890 * nfsd4_proc_verify; however we still decode here just to return
891 * correct error in case of bad xdr. */
893 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
894 if (status == nfserr_inval) {
895 status = nfserrno(status);
900 READ32(verify->ve_attrlen);
901 READ_BUF(verify->ve_attrlen);
902 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
908 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
915 READ_BUF(sizeof(stateid_opaque_t) + 20);
916 READ32(write->wr_stateid.si_generation);
917 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
918 READ64(write->wr_offset);
919 READ32(write->wr_stable_how);
920 if (write->wr_stable_how > 2)
922 READ32(write->wr_buflen);
924 /* Sorry .. no magic macros for this.. *
925 * READ_BUF(write->wr_buflen);
926 * SAVEMEM(write->wr_buf, write->wr_buflen);
928 avail = (char*)argp->end - (char*)argp->p;
929 if (avail + argp->pagelen < write->wr_buflen) {
930 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
933 write->wr_vec[0].iov_base = p;
934 write->wr_vec[0].iov_len = avail;
936 len = write->wr_buflen;
937 while (len > write->wr_vec[v].iov_len) {
938 len -= write->wr_vec[v].iov_len;
940 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
942 if (argp->pagelen >= PAGE_SIZE) {
943 write->wr_vec[v].iov_len = PAGE_SIZE;
944 argp->pagelen -= PAGE_SIZE;
946 write->wr_vec[v].iov_len = argp->pagelen;
947 argp->pagelen -= len;
950 argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
951 argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
952 write->wr_vec[v].iov_len = len;
953 write->wr_vlen = v+1;
959 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
964 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
965 READ32(rlockowner->rl_owner.len);
966 READ_BUF(rlockowner->rl_owner.len);
967 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
973 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
980 * XXX: According to spec, we should check the tag
981 * for UTF-8 compliance. I'm postponing this for
982 * now because it seems that some clients do use
986 READ32(argp->taglen);
987 READ_BUF(argp->taglen + 8);
988 SAVEMEM(argp->tag, argp->taglen);
989 READ32(argp->minorversion);
992 if (argp->taglen > NFSD4_MAX_TAGLEN)
994 if (argp->opcnt > 100)
997 if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) {
998 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1000 argp->ops = argp->iops;
1001 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1006 for (i = 0; i < argp->opcnt; i++) {
1011 * We can't use READ_BUF() here because we need to handle
1012 * a missing opcode as an OP_WRITE + 1. So we need to check
1013 * to see if we're truly at the end of our buffer or if there
1014 * is another page we need to flip to.
1017 if (argp->p == argp->end) {
1018 if (argp->pagelen < 4) {
1019 /* There isn't an opcode still on the wire */
1020 op->opnum = OP_WRITE + 1;
1021 op->status = nfserr_bad_xdr;
1027 * False alarm. We just hit a page boundary, but there
1028 * is still data available. Move pointer across page
1029 * boundary. *snip from READ_BUF*
1031 argp->p = page_address(argp->pagelist[0]);
1033 if (argp->pagelen < PAGE_SIZE) {
1034 argp->end = p + (argp->pagelen>>2);
1037 argp->end = p + (PAGE_SIZE>>2);
1038 argp->pagelen -= PAGE_SIZE;
1041 op->opnum = ntohl(*argp->p++);
1043 switch (op->opnum) {
1044 case 2: /* Reserved operation */
1045 op->opnum = OP_ILLEGAL;
1046 if (argp->minorversion == 0)
1047 op->status = nfserr_op_illegal;
1049 op->status = nfserr_minor_vers_mismatch;
1052 op->status = nfsd4_decode_access(argp, &op->u.access);
1055 op->status = nfsd4_decode_close(argp, &op->u.close);
1058 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1061 op->status = nfsd4_decode_create(argp, &op->u.create);
1063 case OP_DELEGRETURN:
1064 op->status = nfsd4_decode_delegreturn(argp, &op->u.delegreturn);
1067 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1070 op->status = nfs_ok;
1073 op->status = nfsd4_decode_link(argp, &op->u.link);
1076 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1079 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1082 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1085 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1088 op->status = nfs_ok;
1091 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1094 op->status = nfsd4_decode_open(argp, &op->u.open);
1096 case OP_OPEN_CONFIRM:
1097 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1099 case OP_OPEN_DOWNGRADE:
1100 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1103 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1106 op->status = nfs_ok;
1109 op->status = nfsd4_decode_read(argp, &op->u.read);
1112 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1115 op->status = nfs_ok;
1118 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1121 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1124 op->status = nfs_ok;
1127 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1130 op->status = nfs_ok;
1133 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1135 case OP_SETCLIENTID:
1136 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1138 case OP_SETCLIENTID_CONFIRM:
1139 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1142 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1145 op->status = nfsd4_decode_write(argp, &op->u.write);
1147 case OP_RELEASE_LOCKOWNER:
1148 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1151 op->opnum = OP_ILLEGAL;
1152 op->status = nfserr_op_illegal;
1165 * END OF "GENERIC" DECODE ROUTINES.
1169 * START OF "GENERIC" ENCODE ROUTINES.
1170 * These may look a little ugly since they are imported from a "generic"
1171 * set of XDR encode/decode routines which are intended to be shared by
1172 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1174 * If the pain of reading these is too great, it should be a straightforward
1175 * task to translate them into Linux-specific versions which are more
1176 * consistent with the style used in NFSv2/v3...
1178 #define ENCODE_HEAD u32 *p
1180 #define WRITE32(n) *p++ = htonl(n)
1181 #define WRITE64(n) do { \
1182 *p++ = htonl((u32)((n) >> 32)); \
1183 *p++ = htonl((u32)(n)); \
1185 #define WRITEMEM(ptr,nbytes) do { \
1186 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1187 memcpy(p, ptr, nbytes); \
1188 p += XDR_QUADLEN(nbytes); \
1190 #define WRITECINFO(c) do { \
1191 *p++ = htonl(c.atomic); \
1192 *p++ = htonl(c.before_ctime_sec); \
1193 *p++ = htonl(c.before_ctime_nsec); \
1194 *p++ = htonl(c.after_ctime_sec); \
1195 *p++ = htonl(c.after_ctime_nsec); \
1198 #define RESERVE_SPACE(nbytes) do { \
1200 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1202 #define ADJUST_ARGS() resp->p = p
1205 * Header routine to setup seqid operation replay cache
1207 #define ENCODE_SEQID_OP_HEAD \
1214 * Routine for encoding the result of a
1215 * "seqid-mutating" NFSv4 operation. This is
1216 * where seqids are incremented, and the
1217 * replay cache is filled.
1220 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1221 if (seqid_mutating_err(nfserr) && stateowner) { \
1222 if (stateowner->so_confirmed) \
1223 stateowner->so_seqid++; \
1224 stateowner->so_replay.rp_status = nfserr; \
1225 stateowner->so_replay.rp_buflen = \
1226 (((char *)(resp)->p - (char *)save)); \
1227 memcpy(stateowner->so_replay.rp_buf, save, \
1228 stateowner->so_replay.rp_buflen); \
1232 static u32 nfs4_ftypes[16] = {
1233 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1234 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1235 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1236 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1240 nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1241 u32 **p, int *buflen)
1245 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1246 return nfserr_resource;
1247 if (whotype != NFS4_ACL_WHO_NAMED)
1248 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1));
1250 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1252 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1254 return nfserrno(status);
1255 *p = xdr_encode_opaque(*p, NULL, status);
1256 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1257 BUG_ON(*buflen < 0);
1262 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1264 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen);
1268 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1270 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen);
1274 nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group,
1275 u32 **p, int *buflen)
1277 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen);
1282 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1285 * @countp is the buffer size in _words_; upon successful return this becomes
1286 * replaced with the number of words written.
1289 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1290 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1291 struct svc_rqst *rqstp)
1293 u32 bmval0 = bmval[0];
1294 u32 bmval1 = bmval[1];
1296 struct svc_fh tempfh;
1297 struct kstatfs statfs;
1298 int buflen = *countp << 2;
1305 struct nfs4_acl *acl = NULL;
1307 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1308 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1309 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1311 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1314 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1315 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1316 FATTR4_WORD1_SPACE_TOTAL))) {
1317 status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
1321 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
1322 fh_init(&tempfh, NFS4_FHSIZE);
1323 status = fh_compose(&tempfh, exp, dentry, NULL);
1328 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT
1329 | FATTR4_WORD0_SUPPORTED_ATTRS)) {
1330 status = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
1331 aclsupport = (status == 0);
1332 if (bmval0 & FATTR4_WORD0_ACL) {
1333 if (status == -EOPNOTSUPP)
1334 bmval0 &= ~FATTR4_WORD0_ACL;
1335 else if (status == -EINVAL) {
1336 status = nfserr_attrnotsupp;
1338 } else if (status != 0)
1342 if ((buflen -= 16) < 0)
1348 attrlenp = p++; /* to be backfilled later */
1350 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1351 if ((buflen -= 12) < 0)
1354 WRITE32(aclsupport ?
1355 NFSD_SUPPORTED_ATTRS_WORD0 :
1356 NFSD_SUPPORTED_ATTRS_WORD0 & ~FATTR4_WORD0_ACL);
1357 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1359 if (bmval0 & FATTR4_WORD0_TYPE) {
1360 if ((buflen -= 4) < 0)
1362 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1363 if (dummy == NF4BAD)
1364 goto out_serverfault;
1367 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1368 if ((buflen -= 4) < 0)
1370 WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME );
1372 if (bmval0 & FATTR4_WORD0_CHANGE) {
1374 * Note: This _must_ be consistent with the scheme for writing
1375 * change_info, so any changes made here must be reflected there
1376 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1379 if ((buflen -= 8) < 0)
1381 WRITE32(stat.ctime.tv_sec);
1382 WRITE32(stat.ctime.tv_nsec);
1384 if (bmval0 & FATTR4_WORD0_SIZE) {
1385 if ((buflen -= 8) < 0)
1389 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1390 if ((buflen -= 4) < 0)
1394 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1395 if ((buflen -= 4) < 0)
1399 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1400 if ((buflen -= 4) < 0)
1404 if (bmval0 & FATTR4_WORD0_FSID) {
1405 if ((buflen -= 16) < 0)
1407 if (is_fsid(fhp, rqstp->rq_reffh)) {
1408 WRITE64((u64)exp->ex_fsid);
1412 WRITE32(MAJOR(stat.dev));
1414 WRITE32(MINOR(stat.dev));
1417 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1418 if ((buflen -= 4) < 0)
1422 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1423 if ((buflen -= 4) < 0)
1425 WRITE32(NFSD_LEASE_TIME);
1427 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1428 if ((buflen -= 4) < 0)
1432 if (bmval0 & FATTR4_WORD0_ACL) {
1433 struct nfs4_ace *ace;
1434 struct list_head *h;
1437 if ((buflen -= 4) < 0)
1443 if ((buflen -= 4) < 0)
1445 WRITE32(acl->naces);
1447 list_for_each(h, &acl->ace_head) {
1448 ace = list_entry(h, struct nfs4_ace, l_ace);
1450 if ((buflen -= 4*3) < 0)
1454 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL);
1455 status = nfsd4_encode_aclname(rqstp, ace->whotype,
1456 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP,
1458 if (status == nfserr_resource)
1465 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1466 if ((buflen -= 4) < 0)
1468 WRITE32(aclsupport ?
1469 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
1471 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1472 if ((buflen -= 4) < 0)
1476 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1477 if ((buflen -= 4) < 0)
1481 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1482 if ((buflen -= 4) < 0)
1486 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1487 if ((buflen -= 4) < 0)
1491 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1492 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1495 WRITE32(fhp->fh_handle.fh_size);
1496 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1498 if (bmval0 & FATTR4_WORD0_FILEID) {
1499 if ((buflen -= 8) < 0)
1501 WRITE64((u64) stat.ino);
1503 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1504 if ((buflen -= 8) < 0)
1506 WRITE64((u64) statfs.f_ffree);
1508 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1509 if ((buflen -= 8) < 0)
1511 WRITE64((u64) statfs.f_ffree);
1513 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1514 if ((buflen -= 8) < 0)
1516 WRITE64((u64) statfs.f_files);
1518 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1519 if ((buflen -= 4) < 0)
1523 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1524 if ((buflen -= 8) < 0)
1528 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1529 if ((buflen -= 4) < 0)
1533 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1534 if ((buflen -= 4) < 0)
1538 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1539 if ((buflen -= 8) < 0)
1541 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1543 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1544 if ((buflen -= 8) < 0)
1546 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1548 if (bmval1 & FATTR4_WORD1_MODE) {
1549 if ((buflen -= 4) < 0)
1551 WRITE32(stat.mode & S_IALLUGO);
1553 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1554 if ((buflen -= 4) < 0)
1558 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1559 if ((buflen -= 4) < 0)
1561 WRITE32(stat.nlink);
1563 if (bmval1 & FATTR4_WORD1_OWNER) {
1564 status = nfsd4_encode_user(rqstp,
1565 XIDINO_UID(XID_TAG(dentry->d_inode),
1566 stat.uid, stat.xid), &p, &buflen);
1567 if (status == nfserr_resource)
1572 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1573 status = nfsd4_encode_group(rqstp,
1574 XIDINO_GID(XID_TAG(dentry->d_inode),
1575 stat.gid, stat.xid), &p, &buflen);
1576 if (status == nfserr_resource)
1581 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1582 if ((buflen -= 8) < 0)
1584 WRITE32((u32) MAJOR(stat.rdev));
1585 WRITE32((u32) MINOR(stat.rdev));
1587 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1588 if ((buflen -= 8) < 0)
1590 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1593 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1594 if ((buflen -= 8) < 0)
1596 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1599 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1600 if ((buflen -= 8) < 0)
1602 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1605 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1606 if ((buflen -= 8) < 0)
1608 dummy64 = (u64)stat.blocks << 9;
1611 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1612 if ((buflen -= 12) < 0)
1615 WRITE32(stat.atime.tv_sec);
1616 WRITE32(stat.atime.tv_nsec);
1618 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1619 if ((buflen -= 12) < 0)
1625 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1626 if ((buflen -= 12) < 0)
1629 WRITE32(stat.ctime.tv_sec);
1630 WRITE32(stat.ctime.tv_nsec);
1632 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1633 if ((buflen -= 12) < 0)
1636 WRITE32(stat.mtime.tv_sec);
1637 WRITE32(stat.mtime.tv_nsec);
1639 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1640 struct dentry *mnt_pnt, *mnt_root;
1642 if ((buflen -= 8) < 0)
1644 mnt_root = exp->ex_mnt->mnt_root;
1645 if (mnt_root->d_inode == dentry->d_inode) {
1646 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1647 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1649 WRITE64((u64) stat.ino);
1651 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1652 *countp = p - buffer;
1661 status = nfserrno(status);
1665 status = nfserr_resource;
1668 status = nfserr_serverfault;
1673 nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd,
1674 const char *name, int namlen, u32 *p, int *buflen)
1676 struct svc_export *exp = cd->rd_fhp->fh_export;
1677 struct dentry *dentry;
1680 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1682 return nfserrno(PTR_ERR(dentry));
1685 if (d_mountpoint(dentry)) {
1686 if (nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp)) {
1688 * -EAGAIN is the only error returned from
1689 * nfsd_cross_mnt() and it indicates that an
1690 * up-call has been initiated to fill in the export
1691 * options on exp. When the answer comes back,
1692 * this call will be retried.
1694 nfserr = nfserr_dropit;
1699 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval,
1708 nfsd4_encode_rdattr_error(u32 *p, int buflen, int nfserr)
1715 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
1716 *p++ = htonl(0); /* bmval1 */
1719 *p++ = nfserr; /* no htonl */
1720 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1725 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1726 loff_t offset, ino_t ino, unsigned int d_type)
1728 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1730 u32 *p = cd->buffer;
1731 int nfserr = nfserr_toosmall;
1733 /* In nfsv4, "." and ".." never make it onto the wire.. */
1734 if (name && isdotent(name, namlen)) {
1735 cd->common.err = nfs_ok;
1740 xdr_encode_hyper(cd->offset, (u64) offset);
1742 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1746 *p++ = xdr_one; /* mark entry present */
1747 cd->offset = p; /* remember pointer */
1748 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1749 p = xdr_encode_array(p, name, namlen); /* name length & name */
1751 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen);
1756 case nfserr_resource:
1757 nfserr = nfserr_toosmall;
1763 * If the client requested the RDATTR_ERROR attribute,
1764 * we stuff the error code into this attribute
1765 * and continue. If this attribute was not requested,
1766 * then in accordance with the spec, we fail the
1767 * entire READDIR operation(!)
1769 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
1771 nfserr = nfserr_toosmall;
1772 p = nfsd4_encode_rdattr_error(p, buflen, nfserr);
1776 cd->buflen -= (p - cd->buffer);
1778 cd->common.err = nfs_ok;
1781 cd->common.err = nfserr;
1786 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1792 WRITE32(access->ac_supported);
1793 WRITE32(access->ac_resp_access);
1799 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1801 ENCODE_SEQID_OP_HEAD;
1804 RESERVE_SPACE(sizeof(stateid_t));
1805 WRITE32(close->cl_stateid.si_generation);
1806 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1809 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1814 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1820 WRITEMEM(commit->co_verf.data, 8);
1826 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1832 WRITECINFO(create->cr_cinfo);
1834 WRITE32(create->cr_bmval[0]);
1835 WRITE32(create->cr_bmval[1]);
1841 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1843 struct svc_fh *fhp = getattr->ga_fhp;
1849 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1850 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1851 resp->p, &buflen, getattr->ga_bmval,
1860 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1866 len = fhp->fh_handle.fh_size;
1867 RESERVE_SPACE(len + 4);
1869 WRITEMEM(&fhp->fh_handle.fh_base, len);
1875 * Including all fields other than the name, a LOCK4denied structure requires
1876 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1879 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1883 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0));
1884 WRITE64(ld->ld_start);
1885 WRITE64(ld->ld_length);
1886 WRITE32(ld->ld_type);
1888 WRITEMEM(&ld->ld_clientid, 8);
1889 WRITE32(ld->ld_sop->so_owner.len);
1890 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
1891 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner);
1892 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
1893 WRITE64((u64)0); /* clientid */
1894 WRITE32(0); /* length of owner name */
1900 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
1903 ENCODE_SEQID_OP_HEAD;
1906 RESERVE_SPACE(4 + sizeof(stateid_t));
1907 WRITE32(lock->lk_resp_stateid.si_generation);
1908 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
1910 } else if (nfserr == nfserr_denied)
1911 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
1913 ENCODE_SEQID_OP_TAIL(lock->lk_stateowner);
1917 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
1919 if (nfserr == nfserr_denied)
1920 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
1924 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
1926 ENCODE_SEQID_OP_HEAD;
1929 RESERVE_SPACE(sizeof(stateid_t));
1930 WRITE32(locku->lu_stateid.si_generation);
1931 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
1935 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
1940 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
1946 WRITECINFO(link->li_cinfo);
1953 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
1955 ENCODE_SEQID_OP_HEAD;
1960 RESERVE_SPACE(36 + sizeof(stateid_t));
1961 WRITE32(open->op_stateid.si_generation);
1962 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
1963 WRITECINFO(open->op_cinfo);
1964 WRITE32(open->op_rflags);
1966 WRITE32(open->op_bmval[0]);
1967 WRITE32(open->op_bmval[1]);
1968 WRITE32(open->op_delegate_type);
1971 switch (open->op_delegate_type) {
1972 case NFS4_OPEN_DELEGATE_NONE:
1974 case NFS4_OPEN_DELEGATE_READ:
1975 RESERVE_SPACE(20 + sizeof(stateid_t));
1976 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1980 * TODO: ACE's in delegations
1982 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1985 WRITE32(0); /* XXX: is NULL principal ok? */
1988 case NFS4_OPEN_DELEGATE_WRITE:
1989 RESERVE_SPACE(32 + sizeof(stateid_t));
1990 WRITEMEM(&open->op_delegate_stateid, sizeof(stateid_t));
1994 * TODO: space_limit's in delegations
1996 WRITE32(NFS4_LIMIT_SIZE);
2001 * TODO: ACE's in delegations
2003 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2006 WRITE32(0); /* XXX: is NULL principal ok? */
2012 /* XXX save filehandle here */
2014 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2018 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2020 ENCODE_SEQID_OP_HEAD;
2023 RESERVE_SPACE(sizeof(stateid_t));
2024 WRITE32(oc->oc_resp_stateid.si_generation);
2025 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2029 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2033 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2035 ENCODE_SEQID_OP_HEAD;
2038 RESERVE_SPACE(sizeof(stateid_t));
2039 WRITE32(od->od_stateid.si_generation);
2040 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2044 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2048 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2052 unsigned long maxcount;
2058 if (resp->xbuf->page_len)
2059 return nfserr_resource;
2061 RESERVE_SPACE(8); /* eof flag and byte count */
2063 maxcount = NFSSVC_MAXBLKSIZE;
2064 if (maxcount > read->rd_length)
2065 maxcount = read->rd_length;
2070 pn = resp->rqstp->rq_resused;
2071 svc_take_page(resp->rqstp);
2072 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2073 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2079 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp, read->rd_filp,
2080 read->rd_offset, read->rd_iov, read->rd_vlen,
2083 if (nfserr == nfserr_symlink)
2084 nfserr = nfserr_inval;
2087 eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2092 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2094 resp->xbuf->page_len = maxcount;
2096 /* read zero bytes -> don't set up tail */
2100 /* set up page for remaining responses */
2101 svc_take_page(resp->rqstp);
2102 resp->xbuf->tail[0].iov_base =
2103 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2104 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2105 resp->xbuf->tail[0].iov_len = 0;
2106 resp->p = resp->xbuf->tail[0].iov_base;
2107 resp->end = resp->p + PAGE_SIZE/4;
2111 resp->xbuf->tail[0].iov_base += maxcount&3;
2112 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2118 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2126 if (resp->xbuf->page_len)
2127 return nfserr_resource;
2129 svc_take_page(resp->rqstp);
2130 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2132 maxcount = PAGE_SIZE;
2136 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2137 * if they would overflow the buffer. Is this kosher in NFSv4? If
2138 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2139 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2141 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2142 if (nfserr == nfserr_isdir)
2143 return nfserr_inval;
2149 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2151 svc_take_page(resp->rqstp);
2152 resp->xbuf->tail[0].iov_base =
2153 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2154 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2155 resp->xbuf->tail[0].iov_len = 0;
2156 resp->p = resp->xbuf->tail[0].iov_base;
2157 resp->end = resp->p + PAGE_SIZE/4;
2159 resp->xbuf->page_len = maxcount;
2162 resp->xbuf->tail[0].iov_base += maxcount&3;
2163 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2169 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2178 if (resp->xbuf->page_len)
2179 return nfserr_resource;
2181 RESERVE_SPACE(8); /* verifier */
2184 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2188 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2190 maxcount = PAGE_SIZE;
2191 if (maxcount > readdir->rd_maxcount)
2192 maxcount = readdir->rd_maxcount;
2195 * Convert from bytes to words, account for the two words already
2196 * written, make sure to leave two words at the end for the next
2197 * pointer and eof field.
2199 maxcount = (maxcount >> 2) - 4;
2201 nfserr = nfserr_toosmall;
2205 svc_take_page(resp->rqstp);
2206 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2207 readdir->common.err = 0;
2208 readdir->buflen = maxcount;
2209 readdir->buffer = page;
2210 readdir->offset = NULL;
2212 offset = readdir->rd_cookie;
2213 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2215 &readdir->common, nfsd4_encode_dirent);
2216 if (nfserr == nfs_ok &&
2217 readdir->common.err == nfserr_toosmall &&
2218 readdir->buffer == page)
2219 nfserr = nfserr_toosmall;
2220 if (nfserr == nfserr_symlink)
2221 nfserr = nfserr_notdir;
2225 if (readdir->offset)
2226 xdr_encode_hyper(readdir->offset, offset);
2228 p = readdir->buffer;
2229 *p++ = 0; /* no more entries */
2230 *p++ = htonl(readdir->common.err == nfserr_eof);
2231 resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2233 /* allocate a page for the tail */
2234 svc_take_page(resp->rqstp);
2235 resp->xbuf->tail[0].iov_base =
2236 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2237 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2238 resp->xbuf->tail[0].iov_len = 0;
2239 resp->p = resp->xbuf->tail[0].iov_base;
2240 resp->end = resp->p + PAGE_SIZE/4;
2250 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2256 WRITECINFO(remove->rm_cinfo);
2262 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2268 WRITECINFO(rename->rn_sinfo);
2269 WRITECINFO(rename->rn_tinfo);
2275 * The SETATTR encode routine is special -- it always encodes a bitmap,
2276 * regardless of the error status.
2279 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2291 WRITE32(setattr->sa_bmval[0]);
2292 WRITE32(setattr->sa_bmval[1]);
2298 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2303 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2304 WRITEMEM(&scd->se_clientid, 8);
2305 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2308 else if (nfserr == nfserr_clid_inuse) {
2317 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2323 WRITE32(write->wr_bytes_written);
2324 WRITE32(write->wr_how_written);
2325 WRITEMEM(write->wr_verifier.data, 8);
2331 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2338 statp = p++; /* to be backfilled at the end */
2341 switch (op->opnum) {
2343 nfsd4_encode_access(resp, op->status, &op->u.access);
2346 nfsd4_encode_close(resp, op->status, &op->u.close);
2349 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2352 nfsd4_encode_create(resp, op->status, &op->u.create);
2354 case OP_DELEGRETURN:
2357 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2360 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2363 nfsd4_encode_link(resp, op->status, &op->u.link);
2366 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2369 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2372 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2381 nfsd4_encode_open(resp, op->status, &op->u.open);
2383 case OP_OPEN_CONFIRM:
2384 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2386 case OP_OPEN_DOWNGRADE:
2387 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2394 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2397 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2400 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2403 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2406 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2415 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2417 case OP_SETCLIENTID:
2418 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2420 case OP_SETCLIENTID_CONFIRM:
2425 nfsd4_encode_write(resp, op->status, &op->u.write);
2427 case OP_RELEASE_LOCKOWNER:
2434 * Note: We write the status directly, instead of using WRITE32(),
2435 * since it is already in network byte order.
2437 *statp = op->status;
2441 * Encode the reply stored in the stateowner reply cache
2443 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2444 * previously sent already encoded operation.
2446 * called with nfs4_lock_state() held
2449 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2452 struct nfs4_replay *rp = op->replay;
2458 *p++ = rp->rp_status; /* already xdr'ed */
2461 RESERVE_SPACE(rp->rp_buflen);
2462 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2467 * END OF "GENERIC" ENCODE ROUTINES.
2471 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2473 return xdr_ressize_check(rqstp, p);
2476 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2478 if (args->ops != args->iops) {
2480 args->ops = args->iops;
2486 while (args->to_free) {
2487 struct tmpbuf *tb = args->to_free;
2488 args->to_free = tb->next;
2489 tb->release(tb->buf);
2495 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2500 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2501 args->pagelist = rqstp->rq_arg.pages;
2502 args->pagelen = rqstp->rq_arg.page_len;
2504 args->to_free = NULL;
2505 args->ops = args->iops;
2506 args->rqstp = rqstp;
2508 status = nfsd4_decode_compound(args);
2510 nfsd4_release_compoundargs(args);
2516 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2519 * All that remains is to write the tag and operation count...
2523 *p++ = htonl(resp->taglen);
2524 memcpy(p, resp->tag, resp->taglen);
2525 p += XDR_QUADLEN(resp->taglen);
2526 *p++ = htonl(resp->opcnt);
2528 if (rqstp->rq_res.page_len)
2529 iov = &rqstp->rq_res.tail[0];
2531 iov = &rqstp->rq_res.head[0];
2532 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2533 BUG_ON(iov->iov_len > PAGE_SIZE);