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>
59 #define NFSDDBG_FACILITY NFSDDBG_XDR
61 static const char utf8_byte_len[256] = {
62 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,
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 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,
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 0,0,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
69 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
73 is_legal_utf8_sequence(unsigned char *source, int length)
78 if (length==1) return 1;
80 /* Check for overlong sequence, and check second byte */
83 case 0xE0: /* 3 bytes */
84 if ( c < 0xA0 ) return 0;
86 case 0xF0: /* 4 bytes */
87 if ( c < 0x90 ) return 0;
89 case 0xF8: /* 5 bytes */
90 if ( c < 0xC8 ) return 0;
92 case 0xFC: /* 6 bytes */
93 if ( c < 0x84 ) return 0;
96 if ( (c & 0xC0) != 0x80) return 0;
99 /* Check that trailing bytes look like 10xxxxxx */
100 for (ptr = source++ + length - 1; ptr>source; ptr--)
101 if ( ((*ptr) & 0xC0) != 0x80 ) return 0;
105 /* This does some screening on disallowed unicode characters. It is NOT
109 is_allowed_utf8_char(unsigned char *source, int length)
111 /* We assume length and source point to a valid utf8 sequence */
114 /* Disallow F0000 and up (in utf8, F3B08080) */
115 if (*source > 0xF3 ) return 0;
119 if (c >= 0xB0) return 0;
121 /* Disallow D800-F8FF (in utf8, EDA080-EFA3BF */
123 if (c >= 0xA0) return 0;
129 if (c <= 0xA3) return 0;
130 /* Disallow FFF9-FFFF (EFBFB9-EFBFBF) */
132 /* Don't need to check <=0xBF, since valid utf8 */
133 if ( *(source+2) >= 0xB9) return 0;
139 /* This routine should really check to see that the proper stringprep
140 * mappings have been applied. Instead, we do a simple screen of some
141 * of the more obvious illegal values by calling is_allowed_utf8_char.
142 * This will allow many illegal strings through, but if a client behaves,
143 * it will get full functionality. The other option (apart from full
144 * stringprep checking) is to limit everything to an easily handled subset,
145 * such as 7-bit ascii.
147 * Note - currently calling routines ignore return value except as boolean.
150 check_utf8(char *str, int len)
152 unsigned char *chunk, *sourceend;
156 sourceend = str + len;
158 while (chunk < sourceend) {
159 chunklen = utf8_byte_len[*chunk];
162 if (chunk + chunklen > sourceend)
164 if (!is_legal_utf8_sequence(chunk, chunklen))
166 if (!is_allowed_utf8_char(chunk, chunklen))
168 if ( (chunklen==1) && (!*chunk) )
169 return nfserr_inval; /* Disallow embedded nulls */
177 check_filename(char *str, int len, int err)
183 if (isdotent(str, len))
185 for (i = 0; i < len; i++)
188 return check_utf8(str, len);
192 * START OF "GENERIC" DECODE ROUTINES.
193 * These may look a little ugly since they are imported from a "generic"
194 * set of XDR encode/decode routines which are intended to be shared by
195 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
197 * If the pain of reading these is too great, it should be a straightforward
198 * task to translate them into Linux-specific versions which are more
199 * consistent with the style used in NFSv2/v3...
201 #define DECODE_HEAD \
204 #define DECODE_TAIL \
209 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
210 status = nfserr_bad_xdr; \
213 #define READ32(x) (x) = ntohl(*p++)
214 #define READ64(x) do { \
215 (x) = (u64)ntohl(*p++) << 32; \
216 (x) |= ntohl(*p++); \
218 #define READTIME(x) do { \
223 #define READMEM(x,nbytes) do { \
225 p += XDR_QUADLEN(nbytes); \
227 #define SAVEMEM(x,nbytes) do { \
228 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
229 savemem(argp, p, nbytes) : \
231 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
234 p += XDR_QUADLEN(nbytes); \
236 #define COPYMEM(x,nbytes) do { \
237 memcpy((x), p, nbytes); \
238 p += XDR_QUADLEN(nbytes); \
241 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
242 #define READ_BUF(nbytes) do { \
243 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
245 argp->p += XDR_QUADLEN(nbytes); \
246 } else if (!(p = read_buf(argp, nbytes))) { \
247 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__); \
252 u32 *read_buf(struct nfsd4_compoundargs *argp, int nbytes)
254 /* We want more bytes than seem to be available.
255 * Maybe we need a new page, maybe we have just run out
257 int avail = (char*)argp->end - (char*)argp->p;
259 if (avail + argp->pagelen < nbytes)
261 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
263 /* ok, we can do it with the current plus the next page */
264 if (nbytes <= sizeof(argp->tmp))
269 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
274 memcpy(p, argp->p, avail);
275 /* step to next page */
276 argp->p = page_address(argp->pagelist[0]);
278 if (argp->pagelen < PAGE_SIZE) {
279 argp->end = p + (argp->pagelen>>2);
282 argp->end = p + (PAGE_SIZE>>2);
283 argp->pagelen -= PAGE_SIZE;
285 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
286 argp->p += XDR_QUADLEN(nbytes - avail);
290 char *savemem(struct nfsd4_compoundargs *argp, u32 *p, int nbytes)
293 if (p == argp->tmp) {
294 p = kmalloc(nbytes, GFP_KERNEL);
296 memcpy(p, argp->tmp, nbytes);
302 tb = kmalloc(sizeof(*tb), GFP_KERNEL);
308 tb->next = argp->to_free;
315 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
328 READ_BUF(bmlen << 2);
338 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, struct iattr *iattr)
340 int expected_len, len = 0;
346 if ((status = nfsd4_decode_bitmap(argp, bmval)))
350 * According to spec, unsupported attributes return ERR_NOTSUPP;
351 * read-only attributes return ERR_INVAL.
353 if ((bmval[0] & ~NFSD_SUPPORTED_ATTRS_WORD0) || (bmval[1] & ~NFSD_SUPPORTED_ATTRS_WORD1))
354 return nfserr_attrnotsupp;
355 if ((bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0) || (bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1))
359 READ32(expected_len);
361 if (bmval[0] & FATTR4_WORD0_SIZE) {
364 READ64(iattr->ia_size);
365 iattr->ia_valid |= ATTR_SIZE;
367 if (bmval[1] & FATTR4_WORD1_MODE) {
370 READ32(iattr->ia_mode);
371 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
372 iattr->ia_valid |= ATTR_MODE;
374 if (bmval[1] & FATTR4_WORD1_OWNER) {
379 len += (XDR_QUADLEN(dummy32) << 2);
380 READMEM(buf, dummy32);
381 if (check_utf8(buf, dummy32))
383 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
385 iattr->ia_valid |= ATTR_UID;
387 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
392 len += (XDR_QUADLEN(dummy32) << 2);
393 READMEM(buf, dummy32);
394 if (check_utf8(buf, dummy32))
396 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
398 iattr->ia_valid |= ATTR_GID;
400 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
405 case NFS4_SET_TO_CLIENT_TIME:
406 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
407 all 32 bits of 'nseconds'. */
413 READ32(iattr->ia_atime.tv_sec);
414 READ32(iattr->ia_atime.tv_nsec);
415 if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
417 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
419 case NFS4_SET_TO_SERVER_TIME:
420 iattr->ia_valid |= ATTR_ATIME;
426 if (bmval[1] & FATTR4_WORD1_TIME_METADATA) {
427 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
428 all 32 bits of 'nseconds'. */
434 READ32(iattr->ia_ctime.tv_sec);
435 READ32(iattr->ia_ctime.tv_nsec);
436 if (iattr->ia_ctime.tv_nsec >= (u32)1000000000)
438 iattr->ia_valid |= ATTR_CTIME;
440 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
445 case NFS4_SET_TO_CLIENT_TIME:
446 /* We require the high 32 bits of 'seconds' to be 0, and we ignore
447 all 32 bits of 'nseconds'. */
453 READ32(iattr->ia_mtime.tv_sec);
454 READ32(iattr->ia_mtime.tv_nsec);
455 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
457 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
459 case NFS4_SET_TO_SERVER_TIME:
460 iattr->ia_valid |= ATTR_MTIME;
466 if (len != expected_len)
472 status = nfserrno(status);
477 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
482 READ32(access->ac_req_access);
487 #define NFS4_STATE_NOT_LOCKED ((void *)-1)
490 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
494 close->cl_stateowner = NFS4_STATE_NOT_LOCKED;
495 READ_BUF(4 + sizeof(stateid_t));
496 READ32(close->cl_seqid);
497 READ32(close->cl_stateid.si_generation);
498 COPYMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
505 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
510 READ64(commit->co_offset);
511 READ32(commit->co_count);
517 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
522 READ32(create->cr_type);
523 switch (create->cr_type) {
526 READ32(create->cr_linklen);
527 READ_BUF(create->cr_linklen);
528 SAVEMEM(create->cr_linkname, create->cr_linklen);
529 if (check_utf8(create->cr_linkname, create->cr_linklen))
535 READ32(create->cr_specdata1);
536 READ32(create->cr_specdata2);
547 READ32(create->cr_namelen);
548 READ_BUF(create->cr_namelen);
549 SAVEMEM(create->cr_name, create->cr_namelen);
550 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval)))
553 if ((status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr)))
560 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
562 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
566 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
571 READ32(link->li_namelen);
572 READ_BUF(link->li_namelen);
573 SAVEMEM(link->li_name, link->li_namelen);
574 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval)))
581 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
585 lock->lk_stateowner = NFS4_STATE_NOT_LOCKED;
587 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
590 READ32(lock->lk_type);
591 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
593 READ32(lock->lk_reclaim);
594 READ64(lock->lk_offset);
595 READ64(lock->lk_length);
596 READ32(lock->lk_is_new);
598 if (lock->lk_is_new) {
600 READ32(lock->lk_new_open_seqid);
601 READ32(lock->lk_new_open_stateid.si_generation);
603 COPYMEM(&lock->lk_new_open_stateid.si_opaque, sizeof(stateid_opaque_t));
604 READ32(lock->lk_new_lock_seqid);
605 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
606 READ32(lock->lk_new_owner.len);
607 READ_BUF(lock->lk_new_owner.len);
608 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
611 READ32(lock->lk_old_lock_stateid.si_generation);
612 COPYMEM(&lock->lk_old_lock_stateid.si_opaque, sizeof(stateid_opaque_t));
613 READ32(lock->lk_old_lock_seqid);
620 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
625 READ32(lockt->lt_type);
626 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
628 READ64(lockt->lt_offset);
629 READ64(lockt->lt_length);
630 COPYMEM(&lockt->lt_clientid, 8);
631 READ32(lockt->lt_owner.len);
632 READ_BUF(lockt->lt_owner.len);
633 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
639 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
643 locku->lu_stateowner = NFS4_STATE_NOT_LOCKED;
644 READ_BUF(24 + sizeof(stateid_t));
645 READ32(locku->lu_type);
646 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
648 READ32(locku->lu_seqid);
649 READ32(locku->lu_stateid.si_generation);
650 COPYMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
651 READ64(locku->lu_offset);
652 READ64(locku->lu_length);
658 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
663 READ32(lookup->lo_len);
664 READ_BUF(lookup->lo_len);
665 SAVEMEM(lookup->lo_name, lookup->lo_len);
666 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent)))
673 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
677 memset(open->op_bmval, 0, sizeof(open->op_bmval));
678 open->op_iattr.ia_valid = 0;
679 open->op_stateowner = NFS4_STATE_NOT_LOCKED;
681 /* seqid, share_access, share_deny, clientid, ownerlen */
682 READ_BUF(16 + sizeof(clientid_t));
683 READ32(open->op_seqid);
684 READ32(open->op_share_access);
685 READ32(open->op_share_deny);
686 COPYMEM(&open->op_clientid, sizeof(clientid_t));
687 READ32(open->op_owner.len);
689 /* owner, open_flag */
690 READ_BUF(open->op_owner.len + 4);
691 SAVEMEM(open->op_owner.data, open->op_owner.len);
692 READ32(open->op_create);
693 switch (open->op_create) {
694 case NFS4_OPEN_NOCREATE:
696 case NFS4_OPEN_CREATE:
698 READ32(open->op_createmode);
699 switch (open->op_createmode) {
700 case NFS4_CREATE_UNCHECKED:
701 case NFS4_CREATE_GUARDED:
702 if ((status = nfsd4_decode_fattr(argp, open->op_bmval, &open->op_iattr)))
705 case NFS4_CREATE_EXCLUSIVE:
707 COPYMEM(open->op_verf.data, 8);
719 READ32(open->op_claim_type);
720 switch (open->op_claim_type) {
721 case NFS4_OPEN_CLAIM_NULL:
722 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
724 READ32(open->op_fname.len);
725 READ_BUF(open->op_fname.len);
726 SAVEMEM(open->op_fname.data, open->op_fname.len);
727 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval)))
730 case NFS4_OPEN_CLAIM_PREVIOUS:
732 READ32(open->op_delegate_type);
734 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
735 READ_BUF(sizeof(delegation_stateid_t) + 4);
736 COPYMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
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)))
751 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
755 open_conf->oc_stateowner = NFS4_STATE_NOT_LOCKED;
756 READ_BUF(4 + sizeof(stateid_t));
757 READ32(open_conf->oc_req_stateid.si_generation);
758 COPYMEM(&open_conf->oc_req_stateid.si_opaque, sizeof(stateid_opaque_t));
759 READ32(open_conf->oc_seqid);
765 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
769 open_down->od_stateowner = NFS4_STATE_NOT_LOCKED;
770 READ_BUF(4 + sizeof(stateid_t));
771 READ32(open_down->od_stateid.si_generation);
772 COPYMEM(&open_down->od_stateid.si_opaque, sizeof(stateid_opaque_t));
773 READ32(open_down->od_seqid);
774 READ32(open_down->od_share_access);
775 READ32(open_down->od_share_deny);
781 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
786 READ32(putfh->pf_fhlen);
787 if (putfh->pf_fhlen > NFS4_FHSIZE)
789 READ_BUF(putfh->pf_fhlen);
790 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
796 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
800 READ_BUF(sizeof(stateid_t) + 12);
801 READ32(read->rd_stateid.si_generation);
802 COPYMEM(&read->rd_stateid.si_opaque, sizeof(stateid_opaque_t));
803 READ64(read->rd_offset);
804 READ32(read->rd_length);
810 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
815 READ64(readdir->rd_cookie);
816 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
817 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */
818 READ32(readdir->rd_maxcount);
819 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
826 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
831 READ32(remove->rm_namelen);
832 READ_BUF(remove->rm_namelen);
833 SAVEMEM(remove->rm_name, remove->rm_namelen);
834 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent)))
841 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
846 READ32(rename->rn_snamelen);
847 READ_BUF(rename->rn_snamelen + 4);
848 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
849 READ32(rename->rn_tnamelen);
850 READ_BUF(rename->rn_tnamelen);
851 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
852 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent)))
854 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval)))
861 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
865 READ_BUF(sizeof(clientid_t));
866 COPYMEM(clientid, sizeof(clientid_t));
872 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
876 READ_BUF(sizeof(stateid_t));
877 READ32(setattr->sa_stateid.si_generation);
878 COPYMEM(&setattr->sa_stateid.si_opaque, sizeof(stateid_opaque_t));
879 if ((status = nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr)))
886 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
891 COPYMEM(setclientid->se_verf.data, 8);
892 READ32(setclientid->se_namelen);
894 READ_BUF(setclientid->se_namelen + 8);
895 SAVEMEM(setclientid->se_name, setclientid->se_namelen);
896 READ32(setclientid->se_callback_prog);
897 READ32(setclientid->se_callback_netid_len);
899 READ_BUF(setclientid->se_callback_netid_len + 4);
900 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
901 READ32(setclientid->se_callback_addr_len);
903 READ_BUF(setclientid->se_callback_addr_len + 4);
904 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
905 READ32(setclientid->se_callback_ident);
911 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
915 READ_BUF(8 + sizeof(nfs4_verifier));
916 COPYMEM(&scd_c->sc_clientid, 8);
917 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier));
922 /* Also used for NVERIFY */
924 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
927 struct nfsd4_compoundargs save = {
930 .rqstp = argp->rqstp,
933 struct iattr ve_iattr; /* request */
934 struct nfs4_acl *ve_acl; /* request */
938 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
941 /* For convenience's sake, we compare raw xdr'd attributes in
942 * nfsd4_proc_verify; however we still decode here just to return
943 * correct error in case of bad xdr. */
945 status = nfsd4_decode_fattr(ve_bmval, &ve_iattr, &ve_acl);
946 if (status == nfserr_inval) {
947 status = nfserrno(status);
952 READ32(verify->ve_attrlen);
953 READ_BUF(verify->ve_attrlen);
954 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
960 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
967 READ_BUF(sizeof(stateid_opaque_t) + 20);
968 READ32(write->wr_stateid.si_generation);
969 COPYMEM(&write->wr_stateid.si_opaque, sizeof(stateid_opaque_t));
970 READ64(write->wr_offset);
971 READ32(write->wr_stable_how);
972 if (write->wr_stable_how > 2)
974 READ32(write->wr_buflen);
976 /* Sorry .. no magic macros for this.. *
977 * READ_BUF(write->wr_buflen);
978 * SAVEMEM(write->wr_buf, write->wr_buflen);
980 avail = (char*)argp->end - (char*)argp->p;
981 if (avail + argp->pagelen < write->wr_buflen) {
982 printk(KERN_NOTICE "xdr error! (%s:%d)\n", __FILE__, __LINE__);
985 write->wr_vec[0].iov_base = p;
986 write->wr_vec[0].iov_len = avail;
988 len = write->wr_buflen;
989 while (len > write->wr_vec[v].iov_len) {
990 len -= write->wr_vec[v].iov_len;
992 write->wr_vec[v].iov_base = page_address(argp->pagelist[0]);
994 if (argp->pagelen >= PAGE_SIZE) {
995 write->wr_vec[v].iov_len = PAGE_SIZE;
996 argp->pagelen -= PAGE_SIZE;
998 write->wr_vec[v].iov_len = argp->pagelen;
999 argp->pagelen -= len;
1002 argp->end = (u32*) (write->wr_vec[v].iov_base + write->wr_vec[v].iov_len);
1003 argp->p = (u32*) (write->wr_vec[v].iov_base + (XDR_QUADLEN(len) << 2));
1004 write->wr_vec[v].iov_len = len;
1005 write->wr_vlen = v+1;
1011 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1016 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1017 READ32(rlockowner->rl_owner.len);
1018 READ_BUF(rlockowner->rl_owner.len);
1019 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1025 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
1028 struct nfsd4_op *op;
1032 * XXX: According to spec, we should check the tag
1033 * for UTF-8 compliance. I'm postponing this for
1034 * now because it seems that some clients do use
1038 READ32(argp->taglen);
1039 READ_BUF(argp->taglen + 8);
1040 SAVEMEM(argp->tag, argp->taglen);
1041 READ32(argp->minorversion);
1042 READ32(argp->opcnt);
1044 if (argp->taglen > NFSD4_MAX_TAGLEN)
1046 if (argp->opcnt > 100)
1049 if (argp->opcnt > sizeof(argp->iops)/sizeof(argp->iops[0])) {
1050 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
1052 argp->ops = argp->iops;
1053 printk(KERN_INFO "nfsd: couldn't allocate room for COMPOUND\n");
1058 for (i = 0; i < argp->opcnt; i++) {
1063 * We can't use READ_BUF() here because we need to handle
1064 * a missing opcode as an OP_WRITE + 1. So we need to check
1065 * to see if we're truly at the end of our buffer or if there
1066 * is another page we need to flip to.
1069 if (argp->p == argp->end) {
1070 if (argp->pagelen < 4) {
1071 /* There isn't an opcode still on the wire */
1072 op->opnum = OP_WRITE + 1;
1073 op->status = nfserr_bad_xdr;
1079 * False alarm. We just hit a page boundary, but there
1080 * is still data available. Move pointer across page
1081 * boundary. *snip from READ_BUF*
1083 argp->p = page_address(argp->pagelist[0]);
1085 if (argp->pagelen < PAGE_SIZE) {
1086 argp->end = p + (argp->pagelen>>2);
1089 argp->end = p + (PAGE_SIZE>>2);
1090 argp->pagelen -= PAGE_SIZE;
1093 op->opnum = ntohl(*argp->p++);
1095 switch (op->opnum) {
1096 case 2: /* Reserved operation */
1097 op->opnum = OP_ILLEGAL;
1098 if (argp->minorversion == 0)
1099 op->status = nfserr_op_illegal;
1101 op->status = nfserr_minor_vers_mismatch;
1104 op->status = nfsd4_decode_access(argp, &op->u.access);
1107 op->status = nfsd4_decode_close(argp, &op->u.close);
1110 op->status = nfsd4_decode_commit(argp, &op->u.commit);
1113 op->status = nfsd4_decode_create(argp, &op->u.create);
1116 op->status = nfsd4_decode_getattr(argp, &op->u.getattr);
1119 op->status = nfs_ok;
1122 op->status = nfsd4_decode_link(argp, &op->u.link);
1125 op->status = nfsd4_decode_lock(argp, &op->u.lock);
1128 op->status = nfsd4_decode_lockt(argp, &op->u.lockt);
1131 op->status = nfsd4_decode_locku(argp, &op->u.locku);
1134 op->status = nfsd4_decode_lookup(argp, &op->u.lookup);
1137 op->status = nfs_ok;
1140 op->status = nfsd4_decode_verify(argp, &op->u.nverify);
1143 op->status = nfsd4_decode_open(argp, &op->u.open);
1145 case OP_OPEN_CONFIRM:
1146 op->status = nfsd4_decode_open_confirm(argp, &op->u.open_confirm);
1148 case OP_OPEN_DOWNGRADE:
1149 op->status = nfsd4_decode_open_downgrade(argp, &op->u.open_downgrade);
1152 op->status = nfsd4_decode_putfh(argp, &op->u.putfh);
1155 op->status = nfs_ok;
1158 op->status = nfsd4_decode_read(argp, &op->u.read);
1161 op->status = nfsd4_decode_readdir(argp, &op->u.readdir);
1164 op->status = nfs_ok;
1167 op->status = nfsd4_decode_remove(argp, &op->u.remove);
1170 op->status = nfsd4_decode_rename(argp, &op->u.rename);
1173 op->status = nfs_ok;
1176 op->status = nfsd4_decode_renew(argp, &op->u.renew);
1179 op->status = nfs_ok;
1182 op->status = nfsd4_decode_setattr(argp, &op->u.setattr);
1184 case OP_SETCLIENTID:
1185 op->status = nfsd4_decode_setclientid(argp, &op->u.setclientid);
1187 case OP_SETCLIENTID_CONFIRM:
1188 op->status = nfsd4_decode_setclientid_confirm(argp, &op->u.setclientid_confirm);
1191 op->status = nfsd4_decode_verify(argp, &op->u.verify);
1194 op->status = nfsd4_decode_write(argp, &op->u.write);
1196 case OP_RELEASE_LOCKOWNER:
1197 op->status = nfsd4_decode_release_lockowner(argp, &op->u.release_lockowner);
1200 op->opnum = OP_ILLEGAL;
1201 op->status = nfserr_op_illegal;
1214 * END OF "GENERIC" DECODE ROUTINES.
1218 * START OF "GENERIC" ENCODE ROUTINES.
1219 * These may look a little ugly since they are imported from a "generic"
1220 * set of XDR encode/decode routines which are intended to be shared by
1221 * all of our NFSv4 implementations (OpenBSD, MacOS X...).
1223 * If the pain of reading these is too great, it should be a straightforward
1224 * task to translate them into Linux-specific versions which are more
1225 * consistent with the style used in NFSv2/v3...
1227 #define ENCODE_HEAD u32 *p
1229 #define WRITE32(n) *p++ = htonl(n)
1230 #define WRITE64(n) do { \
1231 *p++ = htonl((u32)((n) >> 32)); \
1232 *p++ = htonl((u32)(n)); \
1234 #define WRITEMEM(ptr,nbytes) do { \
1235 *(p + XDR_QUADLEN(nbytes) -1) = 0; \
1236 memcpy(p, ptr, nbytes); \
1237 p += XDR_QUADLEN(nbytes); \
1239 #define WRITECINFO(c) do { \
1240 *p++ = htonl(c.atomic); \
1241 *p++ = htonl(c.before_ctime_sec); \
1242 *p++ = htonl(c.before_ctime_nsec); \
1243 *p++ = htonl(c.after_ctime_sec); \
1244 *p++ = htonl(c.after_ctime_nsec); \
1247 #define RESERVE_SPACE(nbytes) do { \
1249 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \
1251 #define ADJUST_ARGS() resp->p = p
1254 * Header routine to setup seqid operation replay cache
1256 #define ENCODE_SEQID_OP_HEAD \
1263 * Routine for encoding the result of a
1264 * "seqid-mutating" NFSv4 operation. This is
1265 * where seqids are incremented, and the
1266 * replay cache is filled.
1269 #define ENCODE_SEQID_OP_TAIL(stateowner) do { \
1270 if (seqid_mutating_err(nfserr) && stateowner \
1271 && (stateowner != NFS4_STATE_NOT_LOCKED)) { \
1272 if (stateowner->so_confirmed) \
1273 stateowner->so_seqid++; \
1274 stateowner->so_replay.rp_status = nfserr; \
1275 stateowner->so_replay.rp_buflen = \
1276 (((char *)(resp)->p - (char *)save)); \
1277 memcpy(stateowner->so_replay.rp_buf, save, \
1278 stateowner->so_replay.rp_buflen); \
1280 if (stateowner != NFS4_STATE_NOT_LOCKED) \
1281 nfs4_unlock_state(); \
1285 static u32 nfs4_ftypes[16] = {
1286 NF4BAD, NF4FIFO, NF4CHR, NF4BAD,
1287 NF4DIR, NF4BAD, NF4BLK, NF4BAD,
1288 NF4REG, NF4BAD, NF4LNK, NF4BAD,
1289 NF4SOCK, NF4BAD, NF4LNK, NF4BAD,
1293 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
1296 * @countp is the buffer size in _words_; upon successful return this becomes
1297 * replaced with the number of words written.
1300 nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
1301 struct dentry *dentry, u32 *buffer, int *countp, u32 *bmval,
1302 struct svc_rqst *rqstp)
1304 u32 bmval0 = bmval[0];
1305 u32 bmval1 = bmval[1];
1307 char owner[IDMAP_NAMESZ];
1309 char group[IDMAP_NAMESZ];
1311 struct svc_fh tempfh;
1312 struct kstatfs statfs;
1313 int buflen = *countp << 2;
1320 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
1321 BUG_ON(bmval0 & ~NFSD_SUPPORTED_ATTRS_WORD0);
1322 BUG_ON(bmval1 & ~NFSD_SUPPORTED_ATTRS_WORD1);
1324 status = vfs_getattr(exp->ex_mnt, dentry, &stat);
1327 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL)) ||
1328 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
1329 FATTR4_WORD1_SPACE_TOTAL))) {
1330 status = vfs_statfs(dentry->d_inode->i_sb, &statfs);
1334 if ((bmval0 & FATTR4_WORD0_FILEHANDLE) && !fhp) {
1335 fh_init(&tempfh, NFS4_FHSIZE);
1336 status = fh_compose(&tempfh, exp, dentry, NULL);
1341 if (bmval1 & FATTR4_WORD1_OWNER) {
1342 int temp = nfsd_map_uid_to_name(rqstp, stat.uid, owner);
1347 ownerlen = (unsigned) temp;
1349 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1350 int temp = nfsd_map_gid_to_name(rqstp, stat.gid, group);
1355 grouplen = (unsigned) temp;
1358 if ((buflen -= 16) < 0)
1364 attrlenp = p++; /* to be backfilled later */
1366 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
1367 if ((buflen -= 12) < 0)
1370 WRITE32(NFSD_SUPPORTED_ATTRS_WORD0);
1371 WRITE32(NFSD_SUPPORTED_ATTRS_WORD1);
1373 if (bmval0 & FATTR4_WORD0_TYPE) {
1374 if ((buflen -= 4) < 0)
1376 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12];
1377 if (dummy == NF4BAD)
1378 goto out_serverfault;
1381 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
1382 if ((buflen -= 4) < 0)
1384 WRITE32( NFS4_FH_NOEXPIRE_WITH_OPEN | NFS4_FH_VOL_RENAME );
1386 if (bmval0 & FATTR4_WORD0_CHANGE) {
1388 * Note: This _must_ be consistent with the scheme for writing
1389 * change_info, so any changes made here must be reflected there
1390 * as well. (See xdr4.h:set_change_info() and the WRITECINFO()
1393 if ((buflen -= 8) < 0)
1395 WRITE32(stat.ctime.tv_sec);
1396 WRITE32(stat.ctime.tv_nsec);
1398 if (bmval0 & FATTR4_WORD0_SIZE) {
1399 if ((buflen -= 8) < 0)
1403 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
1404 if ((buflen -= 4) < 0)
1408 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
1409 if ((buflen -= 4) < 0)
1413 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
1414 if ((buflen -= 4) < 0)
1418 if (bmval0 & FATTR4_WORD0_FSID) {
1419 if ((buflen -= 16) < 0)
1422 WRITE32(MAJOR(stat.dev));
1424 WRITE32(MINOR(stat.dev));
1426 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
1427 if ((buflen -= 4) < 0)
1431 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
1432 if ((buflen -= 4) < 0)
1434 WRITE32(NFSD_LEASE_TIME);
1436 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
1437 if ((buflen -= 4) < 0)
1441 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
1442 if ((buflen -= 4) < 0)
1446 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
1447 if ((buflen -= 4) < 0)
1451 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
1452 if ((buflen -= 4) < 0)
1456 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
1457 if ((buflen -= 4) < 0)
1461 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
1462 if ((buflen -= 4) < 0)
1466 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
1467 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4;
1470 WRITE32(fhp->fh_handle.fh_size);
1471 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size);
1473 if (bmval0 & FATTR4_WORD0_FILEID) {
1474 if ((buflen -= 8) < 0)
1476 WRITE64((u64) stat.ino);
1478 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
1479 if ((buflen -= 8) < 0)
1481 WRITE64((u64) statfs.f_ffree);
1483 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
1484 if ((buflen -= 8) < 0)
1486 WRITE64((u64) statfs.f_ffree);
1488 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
1489 if ((buflen -= 8) < 0)
1491 WRITE64((u64) statfs.f_files);
1493 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
1494 if ((buflen -= 4) < 0)
1498 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
1499 if ((buflen -= 8) < 0)
1503 if (bmval0 & FATTR4_WORD0_MAXLINK) {
1504 if ((buflen -= 4) < 0)
1508 if (bmval0 & FATTR4_WORD0_MAXNAME) {
1509 if ((buflen -= 4) < 0)
1513 if (bmval0 & FATTR4_WORD0_MAXREAD) {
1514 if ((buflen -= 8) < 0)
1516 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1518 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
1519 if ((buflen -= 8) < 0)
1521 WRITE64((u64) NFSSVC_MAXBLKSIZE);
1523 if (bmval1 & FATTR4_WORD1_MODE) {
1524 if ((buflen -= 4) < 0)
1526 WRITE32(stat.mode & S_IALLUGO);
1528 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
1529 if ((buflen -= 4) < 0)
1533 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
1534 if ((buflen -= 4) < 0)
1536 WRITE32(stat.nlink);
1538 if (bmval1 & FATTR4_WORD1_OWNER) {
1539 buflen -= (XDR_QUADLEN(ownerlen) << 2) + 4;
1543 WRITEMEM(owner, ownerlen);
1545 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
1546 buflen -= (XDR_QUADLEN(grouplen) << 2) + 4;
1550 WRITEMEM(group, grouplen);
1552 if (bmval1 & FATTR4_WORD1_RAWDEV) {
1553 if ((buflen -= 8) < 0)
1555 WRITE32((u32) MAJOR(stat.rdev));
1556 WRITE32((u32) MINOR(stat.rdev));
1558 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
1559 if ((buflen -= 8) < 0)
1561 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
1564 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
1565 if ((buflen -= 8) < 0)
1567 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
1570 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
1571 if ((buflen -= 8) < 0)
1573 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
1576 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
1577 if ((buflen -= 8) < 0)
1579 dummy64 = (u64)stat.blocks << 9;
1582 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
1583 if ((buflen -= 12) < 0)
1586 WRITE32(stat.atime.tv_sec);
1587 WRITE32(stat.atime.tv_nsec);
1589 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
1590 if ((buflen -= 12) < 0)
1596 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
1597 if ((buflen -= 12) < 0)
1600 WRITE32(stat.ctime.tv_sec);
1601 WRITE32(stat.ctime.tv_nsec);
1603 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
1604 if ((buflen -= 12) < 0)
1607 WRITE32(stat.mtime.tv_sec);
1608 WRITE32(stat.mtime.tv_nsec);
1610 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
1611 struct dentry *mnt_pnt, *mnt_root;
1613 if ((buflen -= 8) < 0)
1615 mnt_root = exp->ex_mnt->mnt_root;
1616 if (mnt_root->d_inode == dentry->d_inode) {
1617 mnt_pnt = exp->ex_mnt->mnt_mountpoint;
1618 WRITE64((u64) mnt_pnt->d_inode->i_ino);
1620 WRITE64((u64) stat.ino);
1622 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1623 *countp = p - buffer;
1631 status = nfserrno(status);
1635 status = nfserr_resource;
1638 status = nfserr_serverfault;
1643 nfsd4_encode_dirent(struct readdir_cd *ccd, const char *name, int namlen,
1644 loff_t offset, ino_t ino, unsigned int d_type)
1646 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
1648 u32 *p = cd->buffer;
1650 struct dentry *dentry;
1651 struct svc_export *exp = cd->rd_fhp->fh_export;
1655 /* In nfsv4, "." and ".." never make it onto the wire.. */
1656 if (name && isdotent(name, namlen)) {
1657 cd->common.err = nfs_ok;
1662 xdr_encode_hyper(cd->offset, (u64) offset);
1664 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen);
1668 *p++ = xdr_one; /* mark entry present */
1669 cd->offset = p; /* remember pointer */
1670 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
1671 p = xdr_encode_array(p, name, namlen); /* name length & name */
1674 * Now we come to the ugly part: writing the fattr for this entry.
1676 bmval0 = cd->rd_bmval[0];
1677 bmval1 = cd->rd_bmval[1];
1678 if ((bmval0 & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_FILEID)) || bmval1) {
1680 * "Heavyweight" case: we have no choice except to
1681 * call nfsd4_encode_fattr().
1683 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen);
1684 if (IS_ERR(dentry)) {
1685 nfserr = nfserrno(PTR_ERR(dentry));
1689 if (d_mountpoint(dentry)) {
1690 if ((nfserr = nfsd_cross_mnt(cd->rd_rqstp, &dentry,
1693 * -EAGAIN is the only error returned from
1694 * nfsd_cross_mnt() and it indicates that an
1695 * up-call has been initiated to fill in the export
1696 * options on exp. When the answer comes back,
1697 * this call will be retried.
1700 nfserr = nfserr_dropit;
1706 nfserr = nfsd4_encode_fattr(NULL, exp,
1707 dentry, p, &buflen, cd->rd_bmval,
1713 if (nfserr == nfserr_resource)
1718 * If we get here, we experienced a miscellaneous
1719 * failure while writing the attributes. If the
1720 * client requested the RDATTR_ERROR attribute,
1721 * we stuff the error code into this attribute
1722 * and continue. If this attribute was not requested,
1723 * then in accordance with the spec, we fail the
1724 * entire READDIR operation(!)
1726 if (!(bmval0 & FATTR4_WORD0_RDATTR_ERROR)) {
1727 cd->common.err = nfserr;
1731 bmval0 = FATTR4_WORD0_RDATTR_ERROR;
1733 /* falling through here will do the right thing... */
1737 * In the common "lightweight" case, we avoid
1738 * the overhead of nfsd4_encode_fattr() by assembling
1739 * a small fattr by hand.
1744 *p++ = htonl(bmval0);
1745 *p++ = htonl(bmval1);
1748 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR)
1749 *p++ = nfserr; /* no htonl */
1750 if (bmval0 & FATTR4_WORD0_FILEID)
1751 p = xdr_encode_hyper(p, (u64)ino);
1752 *attrlenp = htonl((char *)p - (char *)attrlenp - 4);
1755 cd->buflen -= (p - cd->buffer);
1757 cd->common.err = nfs_ok;
1761 cd->common.err = nfserr_toosmall;
1766 nfsd4_encode_access(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_access *access)
1772 WRITE32(access->ac_supported);
1773 WRITE32(access->ac_resp_access);
1779 nfsd4_encode_close(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_close *close)
1781 ENCODE_SEQID_OP_HEAD;
1784 RESERVE_SPACE(sizeof(stateid_t));
1785 WRITE32(close->cl_stateid.si_generation);
1786 WRITEMEM(&close->cl_stateid.si_opaque, sizeof(stateid_opaque_t));
1789 ENCODE_SEQID_OP_TAIL(close->cl_stateowner);
1794 nfsd4_encode_commit(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_commit *commit)
1800 WRITEMEM(commit->co_verf.data, 8);
1806 nfsd4_encode_create(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_create *create)
1812 WRITECINFO(create->cr_cinfo);
1814 WRITE32(create->cr_bmval[0]);
1815 WRITE32(create->cr_bmval[1]);
1821 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_getattr *getattr)
1823 struct svc_fh *fhp = getattr->ga_fhp;
1829 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2);
1830 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry,
1831 resp->p, &buflen, getattr->ga_bmval,
1840 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, int nfserr, struct svc_fh *fhp)
1846 len = fhp->fh_handle.fh_size;
1847 RESERVE_SPACE(len + 4);
1849 WRITEMEM(&fhp->fh_handle.fh_base, len);
1855 * Including all fields other than the name, a LOCK4denied structure requires
1856 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
1859 nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld)
1863 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop->so_owner.len));
1864 WRITE64(ld->ld_start);
1865 WRITE64(ld->ld_length);
1866 WRITE32(ld->ld_type);
1867 WRITEMEM(&ld->ld_sop->so_client->cl_clientid, 8);
1868 WRITE32(ld->ld_sop->so_owner.len);
1869 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len);
1874 nfsd4_encode_lock(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lock *lock)
1877 ENCODE_SEQID_OP_HEAD;
1880 RESERVE_SPACE(4 + sizeof(stateid_t));
1881 WRITE32(lock->lk_resp_stateid.si_generation);
1882 WRITEMEM(&lock->lk_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
1884 } else if (nfserr == nfserr_denied)
1885 nfsd4_encode_lock_denied(resp, &lock->lk_denied);
1887 ENCODE_SEQID_OP_TAIL(lock->lk_stateowner);
1891 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_lockt *lockt)
1893 if (nfserr == nfserr_denied)
1894 nfsd4_encode_lock_denied(resp, &lockt->lt_denied);
1898 nfsd4_encode_locku(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_locku *locku)
1900 ENCODE_SEQID_OP_HEAD;
1903 RESERVE_SPACE(sizeof(stateid_t));
1904 WRITE32(locku->lu_stateid.si_generation);
1905 WRITEMEM(&locku->lu_stateid.si_opaque, sizeof(stateid_opaque_t));
1909 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner);
1914 nfsd4_encode_link(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_link *link)
1920 WRITECINFO(link->li_cinfo);
1927 nfsd4_encode_open(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open *open)
1929 ENCODE_SEQID_OP_HEAD;
1934 RESERVE_SPACE(36 + sizeof(stateid_t));
1935 WRITE32(open->op_stateid.si_generation);
1936 WRITEMEM(&open->op_stateid.si_opaque, sizeof(stateid_opaque_t));
1937 WRITECINFO(open->op_cinfo);
1938 WRITE32(open->op_rflags);
1940 WRITE32(open->op_bmval[0]);
1941 WRITE32(open->op_bmval[1]);
1942 WRITE32(open->op_delegate_type);
1945 switch (open->op_delegate_type) {
1946 case NFS4_OPEN_DELEGATE_NONE:
1948 case NFS4_OPEN_DELEGATE_READ:
1949 RESERVE_SPACE(20 + sizeof(delegation_stateid_t));
1950 WRITEMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
1954 * TODO: ACE's in delegations
1956 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1959 WRITE32(0); /* XXX: is NULL principal ok? */
1962 case NFS4_OPEN_DELEGATE_WRITE:
1963 RESERVE_SPACE(32 + sizeof(delegation_stateid_t));
1964 WRITEMEM(&open->op_delegate_stateid, sizeof(delegation_stateid_t));
1968 * TODO: space_limit's in delegations
1970 WRITE32(NFS4_LIMIT_SIZE);
1975 * TODO: ACE's in delegations
1977 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
1980 WRITE32(0); /* XXX: is NULL principal ok? */
1986 /* XXX save filehandle here */
1988 ENCODE_SEQID_OP_TAIL(open->op_stateowner);
1992 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_confirm *oc)
1994 ENCODE_SEQID_OP_HEAD;
1997 RESERVE_SPACE(sizeof(stateid_t));
1998 WRITE32(oc->oc_resp_stateid.si_generation);
1999 WRITEMEM(&oc->oc_resp_stateid.si_opaque, sizeof(stateid_opaque_t));
2003 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner);
2007 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_open_downgrade *od)
2009 ENCODE_SEQID_OP_HEAD;
2012 RESERVE_SPACE(sizeof(stateid_t));
2013 WRITE32(od->od_stateid.si_generation);
2014 WRITEMEM(&od->od_stateid.si_opaque, sizeof(stateid_opaque_t));
2018 ENCODE_SEQID_OP_TAIL(od->od_stateowner);
2022 nfsd4_encode_read(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_read *read)
2026 unsigned long maxcount;
2032 if (resp->xbuf->page_len)
2033 return nfserr_resource;
2035 RESERVE_SPACE(8); /* eof flag and byte count */
2037 maxcount = NFSSVC_MAXBLKSIZE;
2038 if (maxcount > read->rd_length)
2039 maxcount = read->rd_length;
2044 pn = resp->rqstp->rq_resused;
2045 svc_take_page(resp->rqstp);
2046 read->rd_iov[v].iov_base = page_address(resp->rqstp->rq_respages[pn]);
2047 read->rd_iov[v].iov_len = len < PAGE_SIZE ? len : PAGE_SIZE;
2053 nfserr = nfsd_read(read->rd_rqstp, read->rd_fhp,
2055 read->rd_iov, read->rd_vlen,
2057 if (nfserr == nfserr_symlink)
2058 nfserr = nfserr_inval;
2061 eof = (read->rd_offset + maxcount >= read->rd_fhp->fh_dentry->d_inode->i_size);
2066 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2068 resp->xbuf->page_len = maxcount;
2070 /* read zero bytes -> don't set up tail */
2074 /* set up page for remaining responses */
2075 svc_take_page(resp->rqstp);
2076 resp->xbuf->tail[0].iov_base =
2077 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2078 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2079 resp->xbuf->tail[0].iov_len = 0;
2080 resp->p = resp->xbuf->tail[0].iov_base;
2081 resp->end = resp->p + PAGE_SIZE/4;
2085 resp->xbuf->tail[0].iov_base += maxcount&3;
2086 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2092 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readlink *readlink)
2100 if (resp->xbuf->page_len)
2101 return nfserr_resource;
2103 svc_take_page(resp->rqstp);
2104 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2106 maxcount = PAGE_SIZE;
2110 * XXX: By default, the ->readlink() VFS op will truncate symlinks
2111 * if they would overflow the buffer. Is this kosher in NFSv4? If
2112 * not, one easy fix is: if ->readlink() precisely fills the buffer,
2113 * assume that truncation occurred, and return NFS4ERR_RESOURCE.
2115 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount);
2116 if (nfserr == nfserr_isdir)
2117 return nfserr_inval;
2123 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2125 svc_take_page(resp->rqstp);
2126 resp->xbuf->tail[0].iov_base =
2127 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2128 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2129 resp->xbuf->tail[0].iov_len = 0;
2130 resp->p = resp->xbuf->tail[0].iov_base;
2131 resp->end = resp->p + PAGE_SIZE/4;
2133 resp->xbuf->page_len = maxcount;
2136 resp->xbuf->tail[0].iov_base += maxcount&3;
2137 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3);
2143 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_readdir *readdir)
2152 if (resp->xbuf->page_len)
2153 return nfserr_resource;
2155 RESERVE_SPACE(8); /* verifier */
2158 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
2162 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base;
2164 maxcount = PAGE_SIZE;
2165 if (maxcount > readdir->rd_maxcount)
2166 maxcount = readdir->rd_maxcount;
2169 * Convert from bytes to words, account for the two words already
2170 * written, make sure to leave two words at the end for the next
2171 * pointer and eof field.
2173 maxcount = (maxcount >> 2) - 4;
2175 nfserr = nfserr_toosmall;
2179 svc_take_page(resp->rqstp);
2180 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2181 readdir->common.err = 0;
2182 readdir->buflen = maxcount;
2183 readdir->buffer = page;
2184 readdir->offset = NULL;
2186 offset = readdir->rd_cookie;
2187 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
2189 &readdir->common, nfsd4_encode_dirent);
2190 if (nfserr == nfs_ok &&
2191 readdir->common.err == nfserr_toosmall &&
2192 readdir->buffer == page)
2193 nfserr = nfserr_toosmall;
2194 if (nfserr == nfserr_symlink)
2195 nfserr = nfserr_notdir;
2199 if (readdir->offset)
2200 xdr_encode_hyper(readdir->offset, offset);
2202 p = readdir->buffer;
2203 *p++ = 0; /* no more entries */
2204 *p++ = htonl(readdir->common.err == nfserr_eof);
2205 resp->xbuf->page_len = ((char*)p) - (char*)page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2207 /* allocate a page for the tail */
2208 svc_take_page(resp->rqstp);
2209 resp->xbuf->tail[0].iov_base =
2210 page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]);
2211 resp->rqstp->rq_restailpage = resp->rqstp->rq_resused-1;
2212 resp->xbuf->tail[0].iov_len = 0;
2213 resp->p = resp->xbuf->tail[0].iov_base;
2214 resp->end = resp->p + PAGE_SIZE/4;
2224 nfsd4_encode_remove(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_remove *remove)
2230 WRITECINFO(remove->rm_cinfo);
2236 nfsd4_encode_rename(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_rename *rename)
2242 WRITECINFO(rename->rn_sinfo);
2243 WRITECINFO(rename->rn_tinfo);
2249 * The SETATTR encode routine is special -- it always encodes a bitmap,
2250 * regardless of the error status.
2253 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setattr *setattr)
2265 WRITE32(setattr->sa_bmval[0]);
2266 WRITE32(setattr->sa_bmval[1]);
2272 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_setclientid *scd)
2277 RESERVE_SPACE(8 + sizeof(nfs4_verifier));
2278 WRITEMEM(&scd->se_clientid, 8);
2279 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier));
2282 else if (nfserr == nfserr_clid_inuse) {
2291 nfsd4_encode_write(struct nfsd4_compoundres *resp, int nfserr, struct nfsd4_write *write)
2297 WRITE32(write->wr_bytes_written);
2298 WRITE32(write->wr_how_written);
2299 WRITEMEM(write->wr_verifier.data, 8);
2305 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2312 statp = p++; /* to be backfilled at the end */
2315 switch (op->opnum) {
2317 nfsd4_encode_access(resp, op->status, &op->u.access);
2320 nfsd4_encode_close(resp, op->status, &op->u.close);
2323 nfsd4_encode_commit(resp, op->status, &op->u.commit);
2326 nfsd4_encode_create(resp, op->status, &op->u.create);
2329 op->status = nfsd4_encode_getattr(resp, op->status, &op->u.getattr);
2332 nfsd4_encode_getfh(resp, op->status, op->u.getfh);
2335 nfsd4_encode_link(resp, op->status, &op->u.link);
2338 nfsd4_encode_lock(resp, op->status, &op->u.lock);
2341 nfsd4_encode_lockt(resp, op->status, &op->u.lockt);
2344 nfsd4_encode_locku(resp, op->status, &op->u.locku);
2353 nfsd4_encode_open(resp, op->status, &op->u.open);
2355 case OP_OPEN_CONFIRM:
2356 nfsd4_encode_open_confirm(resp, op->status, &op->u.open_confirm);
2358 case OP_OPEN_DOWNGRADE:
2359 nfsd4_encode_open_downgrade(resp, op->status, &op->u.open_downgrade);
2366 op->status = nfsd4_encode_read(resp, op->status, &op->u.read);
2369 op->status = nfsd4_encode_readdir(resp, op->status, &op->u.readdir);
2372 op->status = nfsd4_encode_readlink(resp, op->status, &op->u.readlink);
2375 nfsd4_encode_remove(resp, op->status, &op->u.remove);
2378 nfsd4_encode_rename(resp, op->status, &op->u.rename);
2387 nfsd4_encode_setattr(resp, op->status, &op->u.setattr);
2389 case OP_SETCLIENTID:
2390 nfsd4_encode_setclientid(resp, op->status, &op->u.setclientid);
2392 case OP_SETCLIENTID_CONFIRM:
2397 nfsd4_encode_write(resp, op->status, &op->u.write);
2399 case OP_RELEASE_LOCKOWNER:
2406 * Note: We write the status directly, instead of using WRITE32(),
2407 * since it is already in network byte order.
2409 *statp = op->status;
2413 * Encode the reply stored in the stateowner reply cache
2415 * XDR note: do not encode rp->rp_buflen: the buffer contains the
2416 * previously sent already encoded operation.
2418 * called with nfs4_lock_state() held
2421 nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
2424 struct nfs4_replay *rp = op->replay;
2430 *p++ = rp->rp_status; /* already xdr'ed */
2433 RESERVE_SPACE(rp->rp_buflen);
2434 WRITEMEM(rp->rp_buf, rp->rp_buflen);
2436 nfs4_unlock_state();
2440 * END OF "GENERIC" ENCODE ROUTINES.
2444 nfs4svc_encode_voidres(struct svc_rqst *rqstp, u32 *p, void *dummy)
2446 return xdr_ressize_check(rqstp, p);
2450 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundargs *args)
2455 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
2456 args->pagelist = rqstp->rq_arg.pages;
2457 args->pagelen = rqstp->rq_arg.page_len;
2459 args->to_free = NULL;
2460 args->ops = args->iops;
2461 args->rqstp = rqstp;
2463 status = nfsd4_decode_compound(args);
2465 if (args->ops != args->iops) {
2467 args->ops = args->iops;
2473 while (args->to_free) {
2474 struct tmpbuf *tb = args->to_free;
2475 args->to_free = tb->next;
2484 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, u32 *p, struct nfsd4_compoundres *resp)
2487 * All that remains is to write the tag and operation count...
2491 *p++ = htonl(resp->taglen);
2492 memcpy(p, resp->tag, resp->taglen);
2493 p += XDR_QUADLEN(resp->taglen);
2494 *p++ = htonl(resp->opcnt);
2496 if (rqstp->rq_res.page_len)
2497 iov = &rqstp->rq_res.tail[0];
2499 iov = &rqstp->rq_res.head[0];
2500 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base;
2501 BUG_ON(iov->iov_len > PAGE_SIZE);