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/vserver/xid.h>
60 #define NFSDDBG_FACILITY NFSDDBG_XDR
62 static const char utf8_byte_len[256] = {
63 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
64 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
65 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
66 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
67 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
68 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
69 0,0,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
70 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4,5,5,5,5,6,6,0,0
74 is_legal_utf8_sequence(unsigned char *source, int length)
79 if (length==1) return 1;
81 /* Check for overlong sequence, and check second byte */
84 case 0xE0: /* 3 bytes */
85 if ( c < 0xA0 ) return 0;
87 case 0xF0: /* 4 bytes */
88 if ( c < 0x90 ) return 0;
90 case 0xF8: /* 5 bytes */
91 if ( c < 0xC8 ) return 0;
93 case 0xFC: /* 6 bytes */
94 if ( c < 0x84 ) return 0;
97 if ( (c & 0xC0) != 0x80) return 0;
100 /* Check that trailing bytes look like 10xxxxxx */
101 for (ptr = source++ + length - 1; ptr>source; ptr--)
102 if ( ((*ptr) & 0xC0) != 0x80 ) return 0;
106 /* This does some screening on disallowed unicode characters. It is NOT
110 is_allowed_utf8_char(unsigned char *source, int length)
112 /* We assume length and source point to a valid utf8 sequence */
115 /* Disallow F0000 and up (in utf8, F3B08080) */
116 if (*source > 0xF3 ) return 0;
120 if (c >= 0xB0) return 0;
122 /* Disallow D800-F8FF (in utf8, EDA080-EFA3BF */
124 if (c >= 0xA0) return 0;
130 if (c <= 0xA3) return 0;
131 /* Disallow FFF9-FFFF (EFBFB9-EFBFBF) */
133 /* Don't need to check <=0xBF, since valid utf8 */
134 if ( *(source+2) >= 0xB9) return 0;
140 /* This routine should really check to see that the proper stringprep
141 * mappings have been applied. Instead, we do a simple screen of some
142 * of the more obvious illegal values by calling is_allowed_utf8_char.
143 * This will allow many illegal strings through, but if a client behaves,
144 * it will get full functionality. The other option (apart from full
145 * stringprep checking) is to limit everything to an easily handled subset,
146 * such as 7-bit ascii.
148 * Note - currently calling routines ignore return value except as boolean.
151 check_utf8(char *str, int len)
153 unsigned char *chunk, *sourceend;
157 sourceend = str + len;
159 while (chunk < sourceend) {
160 chunklen = utf8_byte_len[*chunk];
163 if (chunk + chunklen > sourceend)
165 if (!is_legal_utf8_sequence(chunk, chunklen))
167 if (!is_allowed_utf8_char(chunk, chunklen))
169 if ( (chunklen==1) && (!*chunk) )
170 return nfserr_inval; /* Disallow embedded nulls */
178 check_filename(char *str, int len, int err)
184 if (isdotent(str, len))
186 for (i = 0; i < len; i++)
189 return check_utf8(str, len);
193 * START OF "GENERIC" DECODE ROUTINES.
194 * These may look a little ugly since they are imported from a "generic"
195 * set of XDR encode/decode routines which are intended to be shared by
196 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
198 * If the pain of reading these is too great, it should be a straightforward
199 * task to translate them into Linux-specific versions which are more
200 * consistent with the style used in NFSv2/v3...
202 #define DECODE_HEAD \
205 #define DECODE_TAIL \
210 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
211 status = nfserr_bad_xdr; \
214 #define READ32(x) (x) = ntohl(*p++)
215 #define READ64(x) do { \
216 (x) = (u64)ntohl(*p++) << 32; \
217 (x) |= ntohl(*p++); \
219 #define READTIME(x) do { \
224 #define READMEM(x,nbytes) do { \
226 p += XDR_QUADLEN(nbytes); \
228 #define SAVEMEM(x,nbytes) do { \
229 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
230 savemem(argp, p, nbytes) : \
232 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
235 p += XDR_QUADLEN(nbytes); \
237 #define COPYMEM(x,nbytes) do { \
238 memcpy((x), p, nbytes); \
239 p += XDR_QUADLEN(nbytes); \
242 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
243 #define READ_BUF(nbytes) do { \
244 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
246 argp->p += XDR_QUADLEN(nbytes); \
247 } else if (!(p = read_buf(argp, nbytes))) { \
248 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
253 u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
255 /* We want more bytes than seem to be available.
256 * Maybe we need a new page, maybe we have just run out
258 int avail = (char*)argp->end - (char*)argp->p;
260 if (avail + argp->pagelen < nbytes)
262 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
264 /* ok, we can do it with the current plus the next page */
265 if (nbytes <= sizeof(argp->tmp))
270 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
275 memcpy(p, argp->p, avail);
276 /* step to next page */
277 argp->p = page_address(argp->pagelist[0]);
279 if (argp->pagelen < PAGE_SIZE) {
280 argp->end = p + (argp->pagelen>>2);
283 argp->end = p + (PAGE_SIZE>>2);
284 argp->pagelen -= PAGE_SIZE;
286 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
287 argp->p += XDR_QUADLEN(nbytes - avail);
292 defer_free(struct nfsd4_compoundargs *argp,
293 void (*release)(const void *), void *p)
297 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
301 tb->release = release;
302 tb->next = argp->to_free;
307 char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
310 if (p == argp->tmp) {
311 new = kmalloc(nbytes, GFP_KERNEL);
312 if (!new) return NULL;
314 memcpy(p, argp->tmp, nbytes);
320 if (defer_free(argp, kfree, p)) {
329 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
342 READ_BUF(bmlen << 2);
352 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr)
354 int expected_len, len = 0;
360 if ((status = nfsd4_decode_bitmap(argp, bmval)))
364 * According to spec, unsupported attributes return ERR_NOTSUPP;
365 * read-only attributes return ERR_INVAL.
367 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
368 return nfserr_attrnotsupp;
369 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
373 READ32(expected_len);
375 if (bmval[0] & FATTR4_WORD0_SIZE) {
378 READ64(iattr->ia_size);
379 iattr->ia_valid |= ATTR_SIZE;
381 if (bmval[1] & FATTR4_WORD1_MODE) {
384 READ32(iattr->ia_mode);
385 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
386 iattr->ia_valid |= ATTR_MODE;
388 if (bmval[1] & FATTR4_WORD1_OWNER) {
393 len += (XDR_QUADLEN(dummy32) << 2);
394 READMEM(buf, dummy32);
395 if (check_utf8(buf, dummy32))
397 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
399 iattr->ia_valid |= ATTR_UID;
401 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
406 len += (XDR_QUADLEN(dummy32) << 2);
407 READMEM(buf, dummy32);
408 if (check_utf8(buf, dummy32))
410 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
412 iattr->ia_valid |= ATTR_GID;
414 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
419 case NFS4_SET_TO_CLIENT_TIME:
420 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
421 all 32 bits of 'nseconds'. */
427 READ32(iattr->ia_atime.tv_sec);
428 READ32(iattr->ia_atime.tv_nsec);
429 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
431 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
433 case NFS4_SET_TO_SERVER_TIME:
434 iattr->ia_valid |= ATTR_ATIME;
440 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
441 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
442 all 32 bits of 'nseconds'. */
448 READ32(iattr->ia_ctime.tv_sec);
449 READ32(iattr->ia_ctime.tv_nsec);
450 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
452 iattr->ia_valid |= ATTR_CTIME;
454 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
459 case NFS4_SET_TO_CLIENT_TIME:
460 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
461 all 32 bits of 'nseconds'. */
467 READ32(iattr->ia_mtime.tv_sec);
468 READ32(iattr->ia_mtime.tv_nsec);
469 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
471 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
473 case NFS4_SET_TO_SERVER_TIME:
474 iattr->ia_valid |= ATTR_MTIME;
480 if (len != expected_len)
486 status = nfserrno(status);
491 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
496 READ32(access->ac_req_access);
501 #define NFS4_STATE_NOT_LOCKED ((void *)-1)
504 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
508 close->cl_stateowner = NFS4_STATE_NOT_LOCKED;
509 READ_BUF(4 + sizeof(stateid_t));
510 READ32(close->cl_seqid);
511 READ32(close->cl_stateid.si_generation);
512 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
519 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
524 READ64(commit->co_offset);
525 READ32(commit->co_count);
531 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
536 READ32(create->cr_type);
537 switch (create->cr_type) {
540 READ32(create->cr_linklen);
541 READ_BUF(create->cr_linklen);
542 SAVEMEM(create->cr_linkname, create->cr_linklen);
543 if (check_utf8(create->cr_linkname, create->cr_linklen))
549 READ32(create->cr_specdata1);
550 READ32(create->cr_specdata2);
560 READ32(create->cr_namelen);
561 READ_BUF(create->cr_namelen);
562 SAVEMEM(create->cr_name, create->cr_namelen);
563 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
566 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr)))
573 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
575 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
579 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
584 READ32(link->li_namelen);
585 READ_BUF(link->li_namelen);
586 SAVEMEM(link->li_name, link->li_namelen);
587 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
594 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
598 lock->lk_stateowner = NFS4_STATE_NOT_LOCKED;
600 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
603 READ32(lock->lk_type);
604 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
606 READ32(lock->lk_reclaim);
607 READ64(lock->lk_offset);
608 READ64(lock->lk_length);
609 READ32(lock->lk_is_new);
611 if (lock->lk_is_new) {
613 READ32(lock->lk_new_open_seqid);
614 READ32(lock->lk_new_open_stateid.si_generation);
616 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
617 READ32(lock->lk_new_lock_seqid);
618 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
619 READ32(lock->lk_new_owner.len);
620 READ_BUF(lock->lk_new_owner.len);
621 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
624 READ32(lock->lk_old_lock_stateid.si_generation);
625 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
626 READ32(lock->lk_old_lock_seqid);
633 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
638 READ32(lockt->lt_type);
639 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
641 READ64(lockt->lt_offset);
642 READ64(lockt->lt_length);
643 COPYMEM(&lockt->lt_clientid, 8);
644 READ32(lockt->lt_owner.len);
645 READ_BUF(lockt->lt_owner.len);
646 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
652 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
656 locku->lu_stateowner = NFS4_STATE_NOT_LOCKED;
657 READ_BUF(24 + sizeof(stateid_t));
658 READ32(locku->lu_type);
659 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
661 READ32(locku->lu_seqid);
662 READ32(locku->lu_stateid.si_generation);
663 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
664 READ64(locku->lu_offset);
665 READ64(locku->lu_length);
671 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
676 READ32(lookup->lo_len);
677 READ_BUF(lookup->lo_len);
678 SAVEMEM(lookup->lo_name, lookup->lo_len);
679 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
686 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
690 memset(open->op_bmval, 0, sizeof(open->op_bmval));
691 open->op_iattr.ia_valid = 0;
692 open->op_stateowner = NFS4_STATE_NOT_LOCKED;
694 /* seqid, share_access, share_deny, clientid, ownerlen */
695 READ_BUF(16 + sizeof(clientid_t));
696 READ32(open->op_seqid);
697 READ32(open->op_share_access);
698 READ32(open->op_share_deny);
699 COPYMEM(&open->op_clientid, sizeof(clientid_t));
700 READ32(open->op_owner.len);
702 /* owner, open_flag */
703 READ_BUF(open->op_owner.len + 4);
704 SAVEMEM(open->op_owner.data, open->op_owner.len);
705 READ32(open->op_create);
706 switch (open->op_create) {
707 case NFS4_OPEN_NOCREATE:
709 case NFS4_OPEN_CREATE:
711 READ32(open->op_createmode);
712 switch (open->op_createmode) {
713 case NFS4_CREATE_UNCHECKED:
714 case NFS4_CREATE_GUARDED:
715 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr)))
718 case NFS4_CREATE_EXCLUSIVE:
720 COPYMEM(open->op_verf.data, 8);
732 READ32(open->op_claim_type);
733 switch (open->op_claim_type) {
734 case NFS4_OPEN_CLAIM_NULL:
735 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
737 READ32(open->op_fname.len);
738 READ_BUF(open->op_fname.len);
739 SAVEMEM(open->op_fname.data, open->op_fname.len);
740 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
743 case NFS4_OPEN_CLAIM_PREVIOUS:
745 READ32(open->op_delegate_type);
747 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
748 READ_BUF(sizeof(delegation_stateid_t) + 4);
749 COPYMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
750 READ32(open->op_fname.len);
751 READ_BUF(open->op_fname.len);
752 SAVEMEM(open->op_fname.data, open->op_fname.len);
753 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
764 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
768 open_conf->oc_stateowner = NFS4_STATE_NOT_LOCKED;
769 READ_BUF(4 + sizeof(stateid_t));
770 READ32(open_conf->oc_req_stateid.si_generation);
771 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
772 READ32(open_conf->oc_seqid);
778 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
782 open_down->od_stateowner = NFS4_STATE_NOT_LOCKED;
783 READ_BUF(4 + sizeof(stateid_t));
784 READ32(open_down->od_stateid.si_generation);
785 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
786 READ32(open_down->od_seqid);
787 READ32(open_down->od_share_access);
788 READ32(open_down->od_share_deny);
794 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
799 READ32(putfh->pf_fhlen);
800 if (putfh->pf_fhlen > NFS4_FHSIZE)
802 READ_BUF(putfh->pf_fhlen);
803 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
809 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
813 READ_BUF(sizeof(stateid_t) + 12);
814 READ32(read->rd_stateid.si_generation);
815 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
816 READ64(read->rd_offset);
817 READ32(read->rd_length);
823 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
828 READ64(readdir->rd_cookie);
829 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
830 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
831 READ32(readdir->rd_maxcount);
832 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
839 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
844 READ32(remove->rm_namelen);
845 READ_BUF(remove->rm_namelen);
846 SAVEMEM(remove->rm_name, remove->rm_namelen);
847 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
854 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
859 READ32(rename->rn_snamelen);
860 READ_BUF(rename->rn_snamelen + 4);
861 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
862 READ32(rename->rn_tnamelen);
863 READ_BUF(rename->rn_tnamelen);
864 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
865 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
867 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
874 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
878 READ_BUF(sizeof(clientid_t));
879 COPYMEM(clientid, sizeof(clientid_t));
885 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
889 READ_BUF(sizeof(stateid_t));
890 READ32(setattr->sa_stateid.si_generation);
891 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
892 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr)))
899 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
904 COPYMEM(setclientid->se_verf.data, 8);
905 READ32(setclientid->se_namelen);
907 READ_BUF(setclientid->se_namelen + 8);
908 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
909 READ32(setclientid->se_callback_prog);
910 READ32(setclientid->se_callback_netid_len);
912 READ_BUF(setclientid->se_callback_netid_len + 4);
913 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
914 READ32(setclientid->se_callback_addr_len);
916 READ_BUF(setclientid->se_callback_addr_len + 4);
917 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
918 READ32(setclientid->se_callback_ident);
924 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
928 READ_BUF(8 + sizeof(nfs4_verifier));
929 COPYMEM(&scd_c->sc_clientid, 8);
930 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
935 /* Also used for NVERIFY */
937 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
940 struct nfsd4_compoundargs save = {
943 .rqstp = argp->rqstp,
946 struct iattr ve_iattr; /* request */
947 struct nfs4_acl *ve_acl; /* request */
951 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
954 /* For convenience's sake, we compare raw xdr'd attributes in
955 * nfsd4_proc_verify; however we still decode here just to return
956 * correct error in case of bad xdr. */
958 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
959 if (status == nfserr_inval) {
960 status = nfserrno(status);
965 READ32(verify->ve_attrlen);
966 READ_BUF(verify->ve_attrlen);
967 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
973 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
980 READ_BUF(sizeof(stateid_opaque_t) + 20);
981 READ32(write->wr_stateid.si_generation);
982 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
983 READ64(write->wr_offset);
984 READ32(write->wr_stable_how);
985 if (write->wr_stable_how > 2)
987 READ32(write->wr_buflen);
989 /* Sorry .. no magic macros for this.. *
990 * READ_BUF(write->wr_buflen);
991 * SAVEMEM(write->wr_buf, write->wr_buflen);
993 avail = (char*)argp->end - (char*)argp->p;
994 if (avail + argp->pagelen < write->wr_buflen) {
995 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
998 write->wr_vec[0].iov_base = p;
999 write->wr_vec[0].iov_len = avail;
1001 len = write->wr_buflen;
1002 while (len > write->wr_vec[v].iov_len) {
1003 len -= write->wr_vec[v].iov_len;
1005 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
1007 if (argp->pagelen >= PAGE_SIZE) {
1008 write->wr_vec[v].iov_len = PAGE_SIZE;
1009 argp->pagelen -= PAGE_SIZE;
1011 write->wr_vec[v].iov_len = argp->pagelen;
1012 argp->pagelen -= len;
1015 argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
1016 argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1017 write->wr_vec[v].iov_len = len;
1018 write->wr_vlen = v+1;
1024 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1029 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1030 READ32(rlockowner->rl_owner.len);
1031 READ_BUF(rlockowner->rl_owner.len);
1032 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1038 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1041 struct nfsd4_op *op;
1045 * XXX: According to spec, we should check the tag
1046 * for UTF-8 compliance. I'm postponing this for
1047 * now because it seems that some clients do use
1051 READ32(argp->taglen);
1052 READ_BUF(argp->taglen + 8);
1053 SAVEMEM(argp->tag, argp->taglen);
1054 READ32(argp->minorversion);
1055 READ32(argp->opcnt);
1057 if (argp->taglen > NFSD4_MAX_TAGLEN)
1059 if (argp->opcnt > 100)
1062 if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) {
1063 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1065 argp->ops = argp->iops;
1066 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1071 for (i = 0; i < argp->opcnt; i++) {
1076 * We can't use READ_BUF() here because we need to handle
1077 * a missing opcode as an OP_WRITE + 1. So we need to check
1078 * to see if we're truly at the end of our buffer or if there
1079 * is another page we need to flip to.
1082 if (argp->p == argp->end) {
1083 if (argp->pagelen < 4) {
1084 /* There isn't an opcode still on the wire */
1085 op->opnum = OP_WRITE + 1;
1086 op->status = nfserr_bad_xdr;
1092 * False alarm. We just hit a page boundary, but there
1093 * is still data available. Move pointer across page
1094 * boundary. *snip from READ_BUF*
1096 argp->p = page_address(argp->pagelist[0]);
1098 if (argp->pagelen < PAGE_SIZE) {
1099 argp->end = p + (argp->pagelen>>2);
1102 argp->end = p + (PAGE_SIZE>>2);
1103 argp->pagelen -= PAGE_SIZE;
1106 op->opnum = ntohl(*argp->p++);
1108 switch (op->opnum) {
1109 case 2: /* Reserved operation */
1110 op->opnum = OP_ILLEGAL;
1111 if (argp->minorversion == 0)
1112 op->status = nfserr_op_illegal;
1114 op->status = nfserr_minor_vers_mismatch;
1117 op->status = nfsd4_decode_access(argp, &op->u.access);
1120 op->status = nfsd4_decode_close(argp, &op->u.close);
1123 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1126 op->status = nfsd4_decode_create(argp, &op->u.create);
1129 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1132 op->status = nfs_ok;
1135 op->status = nfsd4_decode_link(argp, &op->u.link);
1138 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1141 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1144 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1147 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1150 op->status = nfs_ok;
1153 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1156 op->status = nfsd4_decode_open(argp, &op->u.open);
1158 case OP_OPEN_CONFIRM:
1159 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1161 case OP_OPEN_DOWNGRADE:
1162 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1165 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1168 op->status = nfs_ok;
1171 op->status = nfsd4_decode_read(argp, &op->u.read);
1174 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1177 op->status = nfs_ok;
1180 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1183 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1186 op->status = nfs_ok;
1189 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1192 op->status = nfs_ok;
1195 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1197 case OP_SETCLIENTID:
1198 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1200 case OP_SETCLIENTID_CONFIRM:
1201 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1204 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1207 op->status = nfsd4_decode_write(argp, &op->u.write);
1209 case OP_RELEASE_LOCKOWNER:
1210 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1213 op->opnum = OP_ILLEGAL;
1214 op->status = nfserr_op_illegal;
1227 * END OF "GENERIC" DECODE ROUTINES.
1231 * START OF "GENERIC" ENCODE ROUTINES.
1232 * These may look a little ugly since they are imported from a "generic"
1233 * set of XDR encode/decode routines which are intended to be shared by
1234 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1236 * If the pain of reading these is too great, it should be a straightforward
1237 * task to translate them into Linux-specific versions which are more
1238 * consistent with the style used in NFSv2/v3...
1240 #define ENCODE_HEAD u32 *p
1242 #define WRITE32(n) *p++ = htonl(n)
1243 #define WRITE64(n) do { \
1244 *p++ = htonl((u32)((n) >> 32)); \
1245 *p++ = htonl((u32)(n)); \
1247 #define WRITEMEM(ptr,nbytes) do { \
1248 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1249 memcpy(p, ptr, nbytes); \
1250 p += XDR_QUADLEN(nbytes); \
1252 #define WRITECINFO(c) do { \
1253 *p++ = htonl(c.atomic); \
1254 *p++ = htonl(c.before_ctime_sec); \
1255 *p++ = htonl(c.before_ctime_nsec); \
1256 *p++ = htonl(c.after_ctime_sec); \
1257 *p++ = htonl(c.after_ctime_nsec); \
1260 #define RESERVE_SPACE(nbytes) do { \
1262 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1264 #define ADJUST_ARGS() resp->p = p
1267 * Header routine to setup seqid operation replay cache
1269 #define ENCODE_SEQID_OP_HEAD \
1276 * Routine for encoding the result of a
1277 * "seqid-mutating" NFSv4 operation. This is
1278 * where seqids are incremented, and the
1279 * replay cache is filled.
1282 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1283 if (seqid_mutating_err(nfserr) && stateowner \
1284 && (stateowner != NFS4_STATE_NOT_LOCKED)) { \
1285 if (stateowner->so_confirmed) \
1286 stateowner->so_seqid++; \
1287 stateowner->so_replay.rp_status = nfserr; \
1288 stateowner->so_replay.rp_buflen = \
1289 (((char *)(resp)->p - (char *)save)); \
1290 memcpy(stateowner->so_replay.rp_buf, save, \
1291 stateowner->so_replay.rp_buflen); \
1293 if (stateowner != NFS4_STATE_NOT_LOCKED) \
1294 nfs4_unlock_state(); \
1298 static u32 nfs4_ftypes[16] = {
1299 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1300 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1301 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1302 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1306 nfsd4_encode_name(struct svc_rqst *rqstp, int group, uid_t id,
1307 u32 **p, int *buflen)
1311 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4)
1312 return nfserr_resource;
1314 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1));
1316 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1));
1318 return nfserrno(status);
1319 *p = xdr_encode_opaque(*p, NULL, status);
1320 *buflen -= (XDR_QUADLEN(status) << 2) + 4;
1321 BUG_ON(*buflen < 0);
1326 nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, u32 **p, int *buflen)
1328 return nfsd4_encode_name(rqstp, uid, 0, p, buflen);
1332 nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, u32 **p, int *buflen)
1334 return nfsd4_encode_name(rqstp, gid, 1, p, buflen);
1339 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1342 * @countp is the buffer size in _words_; upon successful return this becomes
1343 * replaced with the number of words written.
1346 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1347 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1348 struct svc_rqst *rqstp)
1350 u32 bmval0 = bmval[0];
1351 u32 bmval1 = bmval[1];
1353 struct svc_fh tempfh;
1354 struct kstatfs statfs;
1355 int buflen = *countp << 2;
1362 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1363 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1364 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1366 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1369 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1370 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1371 FATTR4_WORD1_SPACE_TOTAL))) {
1372 status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
1376 if ((bmval0 & FATTR4_WORD0_FILEHANDLE) && !fhp) {
1377 fh_init(&tempfh, NFS4_FHSIZE);
1378 status = fh_compose(&tempfh, exp, dentry, NULL);
1383 if ((buflen -= 16) < 0)
1389 attrlenp = p++; /* to be backfilled later */
1391 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1392 if ((buflen -= 12) < 0)
1395 WRITE32(NFSD_SUPPORTED_ATTRS_WORD0);
1396 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1398 if (bmval0 & FATTR4_WORD0_TYPE) {
1399 if ((buflen -= 4) < 0)
1401 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1402 if (dummy == NF4BAD)
1403 goto out_serverfault;
1406 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1407 if ((buflen -= 4) < 0)
1409 WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME );
1411 if (bmval0 & FATTR4_WORD0_CHANGE) {
1413 * Note: This _must_ be consistent with the scheme for writing
1414 * change_info, so any changes made here must be reflected there
1415 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1418 if ((buflen -= 8) < 0)
1420 WRITE32(stat.ctime.tv_sec);
1421 WRITE32(stat.ctime.tv_nsec);
1423 if (bmval0 & FATTR4_WORD0_SIZE) {
1424 if ((buflen -= 8) < 0)
1428 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1429 if ((buflen -= 4) < 0)
1433 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1434 if ((buflen -= 4) < 0)
1438 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1439 if ((buflen -= 4) < 0)
1443 if (bmval0 & FATTR4_WORD0_FSID) {
1444 if ((buflen -= 16) < 0)
1447 WRITE32(MAJOR(stat.dev));
1449 WRITE32(MINOR(stat.dev));
1451 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1452 if ((buflen -= 4) < 0)
1456 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1457 if ((buflen -= 4) < 0)
1459 WRITE32(NFSD_LEASE_TIME);
1461 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1462 if ((buflen -= 4) < 0)
1466 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1467 if ((buflen -= 4) < 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;
1660 status = nfserrno(status);
1664 status = nfserr_resource;
1667 status = nfserr_serverfault;
1672 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1673 loff_t offset, ino_t ino, unsigned int d_type)
1675 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1677 u32 *p = cd->buffer;
1679 struct dentry *dentry;
1680 struct svc_export *exp = cd->rd_fhp->fh_export;
1684 /* In nfsv4, "." and ".." never make it onto the wire.. */
1685 if (name && isdotent(name, namlen)) {
1686 cd->common.err = nfs_ok;
1691 xdr_encode_hyper(cd->offset, (u64) offset);
1693 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1697 *p++ = xdr_one; /* mark entry present */
1698 cd->offset = p; /* remember pointer */
1699 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1700 p = xdr_encode_array(p, name, namlen); /* name length & name */
1703 * Now we come to the ugly part: writing the fattr for this entry.
1705 bmval0 = cd->rd_bmval[0];
1706 bmval1 = cd->rd_bmval[1];
1707 if ((bmval0 & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_FILEID)) || bmval1) {
1709 * "Heavyweight" case: we have no choice except to
1710 * call nfsd4_encode_fattr().
1712 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1713 if (IS_ERR(dentry)) {
1714 nfserr = nfserrno(PTR_ERR(dentry));
1719 if (d_mountpoint(dentry)) {
1720 if ((nfserr = nfsd_cross_mnt(cd->rd_rqstp, &dentry,
1723 * -EAGAIN is the only error returned from
1724 * nfsd_cross_mnt() and it indicates that an
1725 * up-call has been initiated to fill in the export
1726 * options on exp. When the answer comes back,
1727 * this call will be retried.
1731 nfserr = nfserr_dropit;
1737 nfserr = nfsd4_encode_fattr(NULL, exp,
1738 dentry, p, &buflen, cd->rd_bmval,
1746 if (nfserr == nfserr_resource)
1751 * If we get here, we experienced a miscellaneous
1752 * failure while writing the attributes. If the
1753 * client requested the RDATTR_ERROR attribute,
1754 * we stuff the error code into this attribute
1755 * and continue. If this attribute was not requested,
1756 * then in accordance with the spec, we fail the
1757 * entire READDIR operation(!)
1759 if (!(bmval0 & FATTR4_WORD0_RDATTR_ERROR)) {
1760 cd->common.err = nfserr;
1764 bmval0 = FATTR4_WORD0_RDATTR_ERROR;
1766 /* falling through here will do the right thing... */
1770 * In the common "lightweight" case, we avoid
1771 * the overhead of nfsd4_encode_fattr() by assembling
1772 * a small fattr by hand.
1777 *p++ = htonl(bmval0);
1778 *p++ = htonl(bmval1);
1781 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR)
1782 *p++ = nfserr; /* no htonl */
1783 if (bmval0 & FATTR4_WORD0_FILEID)
1784 p = xdr_encode_hyper(p, (u64)ino);
1785 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1788 cd->buflen -= (p - cd->buffer);
1790 cd->common.err = nfs_ok;
1794 cd->common.err = nfserr_toosmall;
1799 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1805 WRITE32(access->ac_supported);
1806 WRITE32(access->ac_resp_access);
1812 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1814 ENCODE_SEQID_OP_HEAD;
1817 RESERVE_SPACE(sizeof(stateid_t));
1818 WRITE32(close->cl_stateid.si_generation);
1819 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1822 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1827 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1833 WRITEMEM(commit->co_verf.data, 8);
1839 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1845 WRITECINFO(create->cr_cinfo);
1847 WRITE32(create->cr_bmval[0]);
1848 WRITE32(create->cr_bmval[1]);
1854 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1856 struct svc_fh *fhp = getattr->ga_fhp;
1862 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1863 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1864 resp->p, &buflen, getattr->ga_bmval,
1873 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1879 len = fhp->fh_handle.fh_size;
1880 RESERVE_SPACE(len + 4);
1882 WRITEMEM(&fhp->fh_handle.fh_base, len);
1888 * Including all fields other than the name, a LOCK4denied structure requires
1889 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1892 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1896 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop->so_owner.len));
1897 WRITE64(ld->ld_start);
1898 WRITE64(ld->ld_length);
1899 WRITE32(ld->ld_type);
1900 WRITEMEM(&ld->ld_sop->so_client->cl_clientid, 8);
1901 WRITE32(ld->ld_sop->so_owner.len);
1902 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
1907 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
1910 ENCODE_SEQID_OP_HEAD;
1913 RESERVE_SPACE(4 + sizeof(stateid_t));
1914 WRITE32(lock->lk_resp_stateid.si_generation);
1915 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
1917 } else if (nfserr == nfserr_denied)
1918 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
1920 ENCODE_SEQID_OP_TAIL(lock->lk_stateowner);
1924 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
1926 if (nfserr == nfserr_denied)
1927 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
1931 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
1933 ENCODE_SEQID_OP_HEAD;
1936 RESERVE_SPACE(sizeof(stateid_t));
1937 WRITE32(locku->lu_stateid.si_generation);
1938 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
1942 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
1947 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
1953 WRITECINFO(link->li_cinfo);
1960 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
1962 ENCODE_SEQID_OP_HEAD;
1967 RESERVE_SPACE(36 + sizeof(stateid_t));
1968 WRITE32(open->op_stateid.si_generation);
1969 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
1970 WRITECINFO(open->op_cinfo);
1971 WRITE32(open->op_rflags);
1973 WRITE32(open->op_bmval[0]);
1974 WRITE32(open->op_bmval[1]);
1975 WRITE32(open->op_delegate_type);
1978 switch (open->op_delegate_type) {
1979 case NFS4_OPEN_DELEGATE_NONE:
1981 case NFS4_OPEN_DELEGATE_READ:
1982 RESERVE_SPACE(20 + sizeof(delegation_stateid_t));
1983 WRITEMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
1987 * TODO: ACE's in delegations
1989 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1992 WRITE32(0); /* XXX: is NULL principal ok? */
1995 case NFS4_OPEN_DELEGATE_WRITE:
1996 RESERVE_SPACE(32 + sizeof(delegation_stateid_t));
1997 WRITEMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
2001 * TODO: space_limit's in delegations
2003 WRITE32(NFS4_LIMIT_SIZE);
2008 * TODO: ACE's in delegations
2010 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
2013 WRITE32(0); /* XXX: is NULL principal ok? */
2019 /* XXX save filehandle here */
2021 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
2025 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
2027 ENCODE_SEQID_OP_HEAD;
2030 RESERVE_SPACE(sizeof(stateid_t));
2031 WRITE32(oc->oc_resp_stateid.si_generation);
2032 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2036 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2040 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2042 ENCODE_SEQID_OP_HEAD;
2045 RESERVE_SPACE(sizeof(stateid_t));
2046 WRITE32(od->od_stateid.si_generation);
2047 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2051 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2055 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2059 unsigned long maxcount;
2065 if (resp->xbuf->page_len)
2066 return nfserr_resource;
2068 RESERVE_SPACE(8); /* eof flag and byte count */
2070 maxcount = NFSSVC_MAXBLKSIZE;
2071 if (maxcount > read->rd_length)
2072 maxcount = read->rd_length;
2077 pn = resp->rqstp->rq_resused;
2078 svc_take_page(resp->rqstp);
2079 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2080 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2086 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp,
2088 read->rd_iov, read->rd_vlen,
2090 if (nfserr == nfserr_symlink)
2091 nfserr = nfserr_inval;
2094 eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2099 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2101 resp->xbuf->page_len = maxcount;
2103 /* read zero bytes -> don't set up tail */
2107 /* set up page for remaining responses */
2108 svc_take_page(resp->rqstp);
2109 resp->xbuf->tail[0].iov_base =
2110 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2111 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2112 resp->xbuf->tail[0].iov_len = 0;
2113 resp->p = resp->xbuf->tail[0].iov_base;
2114 resp->end = resp->p + PAGE_SIZE/4;
2118 resp->xbuf->tail[0].iov_base += maxcount&3;
2119 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2125 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2133 if (resp->xbuf->page_len)
2134 return nfserr_resource;
2136 svc_take_page(resp->rqstp);
2137 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2139 maxcount = PAGE_SIZE;
2143 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2144 * if they would overflow the buffer. Is this kosher in NFSv4? If
2145 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2146 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2148 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2149 if (nfserr == nfserr_isdir)
2150 return nfserr_inval;
2156 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2158 svc_take_page(resp->rqstp);
2159 resp->xbuf->tail[0].iov_base =
2160 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2161 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2162 resp->xbuf->tail[0].iov_len = 0;
2163 resp->p = resp->xbuf->tail[0].iov_base;
2164 resp->end = resp->p + PAGE_SIZE/4;
2166 resp->xbuf->page_len = maxcount;
2169 resp->xbuf->tail[0].iov_base += maxcount&3;
2170 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2176 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2185 if (resp->xbuf->page_len)
2186 return nfserr_resource;
2188 RESERVE_SPACE(8); /* verifier */
2191 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2195 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2197 maxcount = PAGE_SIZE;
2198 if (maxcount > readdir->rd_maxcount)
2199 maxcount = readdir->rd_maxcount;
2202 * Convert from bytes to words, account for the two words already
2203 * written, make sure to leave two words at the end for the next
2204 * pointer and eof field.
2206 maxcount = (maxcount >> 2) - 4;
2208 nfserr = nfserr_toosmall;
2212 svc_take_page(resp->rqstp);
2213 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2214 readdir->common.err = 0;
2215 readdir->buflen = maxcount;
2216 readdir->buffer = page;
2217 readdir->offset = NULL;
2219 offset = readdir->rd_cookie;
2220 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2222 &readdir->common, nfsd4_encode_dirent);
2223 if (nfserr == nfs_ok &&
2224 readdir->common.err == nfserr_toosmall &&
2225 readdir->buffer == page)
2226 nfserr = nfserr_toosmall;
2227 if (nfserr == nfserr_symlink)
2228 nfserr = nfserr_notdir;
2232 if (readdir->offset)
2233 xdr_encode_hyper(readdir->offset, offset);
2235 p = readdir->buffer;
2236 *p++ = 0; /* no more entries */
2237 *p++ = htonl(readdir->common.err == nfserr_eof);
2238 resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2240 /* allocate a page for the tail */
2241 svc_take_page(resp->rqstp);
2242 resp->xbuf->tail[0].iov_base =
2243 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2244 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2245 resp->xbuf->tail[0].iov_len = 0;
2246 resp->p = resp->xbuf->tail[0].iov_base;
2247 resp->end = resp->p + PAGE_SIZE/4;
2257 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2263 WRITECINFO(remove->rm_cinfo);
2269 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2275 WRITECINFO(rename->rn_sinfo);
2276 WRITECINFO(rename->rn_tinfo);
2282 * The SETATTR encode routine is special -- it always encodes a bitmap,
2283 * regardless of the error status.
2286 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2298 WRITE32(setattr->sa_bmval[0]);
2299 WRITE32(setattr->sa_bmval[1]);
2305 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2310 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2311 WRITEMEM(&scd->se_clientid, 8);
2312 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2315 else if (nfserr == nfserr_clid_inuse) {
2324 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2330 WRITE32(write->wr_bytes_written);
2331 WRITE32(write->wr_how_written);
2332 WRITEMEM(write->wr_verifier.data, 8);
2338 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2345 statp = p++; /* to be backfilled at the end */
2348 switch (op->opnum) {
2350 nfsd4_encode_access(resp, op->status, &op->u.access);
2353 nfsd4_encode_close(resp, op->status, &op->u.close);
2356 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2359 nfsd4_encode_create(resp, op->status, &op->u.create);
2362 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2365 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2368 nfsd4_encode_link(resp, op->status, &op->u.link);
2371 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2374 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2377 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2386 nfsd4_encode_open(resp, op->status, &op->u.open);
2388 case OP_OPEN_CONFIRM:
2389 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2391 case OP_OPEN_DOWNGRADE:
2392 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2399 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2402 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2405 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2408 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2411 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2420 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2422 case OP_SETCLIENTID:
2423 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2425 case OP_SETCLIENTID_CONFIRM:
2430 nfsd4_encode_write(resp, op->status, &op->u.write);
2432 case OP_RELEASE_LOCKOWNER:
2439 * Note: We write the status directly, instead of using WRITE32(),
2440 * since it is already in network byte order.
2442 *statp = op->status;
2446 * Encode the reply stored in the stateowner reply cache
2448 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2449 * previously sent already encoded operation.
2451 * called with nfs4_lock_state() held
2454 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2457 struct nfs4_replay *rp = op->replay;
2463 *p++ = rp->rp_status; /* already xdr'ed */
2466 RESERVE_SPACE(rp->rp_buflen);
2467 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2469 nfs4_unlock_state();
2473 * END OF "GENERIC" ENCODE ROUTINES.
2477 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2479 return xdr_ressize_check(rqstp, p);
2482 void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args)
2484 if (args->ops != args->iops) {
2486 args->ops = args->iops;
2492 while (args->to_free) {
2493 struct tmpbuf *tb = args->to_free;
2494 args->to_free = tb->next;
2495 tb->release(tb->buf);
2501 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2506 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2507 args->pagelist = rqstp->rq_arg.pages;
2508 args->pagelen = rqstp->rq_arg.page_len;
2510 args->to_free = NULL;
2511 args->ops = args->iops;
2512 args->rqstp = rqstp;
2514 status = nfsd4_decode_compound(args);
2516 nfsd4_release_compoundargs(args);
2522 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2525 * All that remains is to write the tag and operation count...
2529 *p++ = htonl(resp->taglen);
2530 memcpy(p, resp->tag, resp->taglen);
2531 p += XDR_QUADLEN(resp->taglen);
2532 *p++ = htonl(resp->opcnt);
2534 if (rqstp->rq_res.page_len)
2535 iov = &rqstp->rq_res.tail[0];
2537 iov = &rqstp->rq_res.head[0];
2538 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2539 BUG_ON(iov->iov_len > PAGE_SIZE);