2 * Server-side XDR for NFSv4
4 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include <linux/file.h>
37 #include <linux/slab.h>
38 #include <linux/namei.h>
39 #include <linux/statfs.h>
40 #include <linux/utsname.h>
41 #include <linux/pagemap.h>
42 #include <linux/sunrpc/svcauth_gss.h>
43 #include <linux/sunrpc/addr.h>
44 #include <linux/xattr.h>
45 #include <uapi/linux/xattr.h>
55 #include "filecache.h"
57 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
58 #include <linux/security.h>
62 #define NFSDDBG_FACILITY NFSDDBG_XDR
64 const u32 nfsd_suppattrs[3][3] = {
65 {NFSD4_SUPPORTED_ATTRS_WORD0,
66 NFSD4_SUPPORTED_ATTRS_WORD1,
67 NFSD4_SUPPORTED_ATTRS_WORD2},
69 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
70 NFSD4_1_SUPPORTED_ATTRS_WORD1,
71 NFSD4_1_SUPPORTED_ATTRS_WORD2},
73 {NFSD4_1_SUPPORTED_ATTRS_WORD0,
74 NFSD4_1_SUPPORTED_ATTRS_WORD1,
75 NFSD4_2_SUPPORTED_ATTRS_WORD2},
79 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing
80 * directory in order to indicate to the client that a filesystem boundary is present
81 * We use a fixed fsid for a referral
83 #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL
84 #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL
87 check_filename(char *str, int len)
93 if (isdotent(str, len))
94 return nfserr_badname;
95 for (i = 0; i < len; i++)
97 return nfserr_badname;
101 #define DECODE_HEAD \
104 #define DECODE_TAIL \
109 dprintk("NFSD: xdr error (%s:%d)\n", \
110 __FILE__, __LINE__); \
111 status = nfserr_bad_xdr; \
114 #define READMEM(x,nbytes) do { \
116 p += XDR_QUADLEN(nbytes); \
118 #define SAVEMEM(x,nbytes) do { \
119 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \
120 savemem(argp, p, nbytes) : \
122 dprintk("NFSD: xdr error (%s:%d)\n", \
123 __FILE__, __LINE__); \
126 p += XDR_QUADLEN(nbytes); \
128 #define COPYMEM(x,nbytes) do { \
129 memcpy((x), p, nbytes); \
130 p += XDR_QUADLEN(nbytes); \
133 /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */
134 #define READ_BUF(nbytes) do { \
135 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \
137 argp->p += XDR_QUADLEN(nbytes); \
138 } else if (!(p = read_buf(argp, nbytes))) { \
139 dprintk("NFSD: xdr error (%s:%d)\n", \
140 __FILE__, __LINE__); \
145 static void next_decode_page(struct nfsd4_compoundargs *argp)
147 argp->p = page_address(argp->pagelist[0]);
149 if (argp->pagelen < PAGE_SIZE) {
150 argp->end = argp->p + XDR_QUADLEN(argp->pagelen);
153 argp->end = argp->p + (PAGE_SIZE>>2);
154 argp->pagelen -= PAGE_SIZE;
158 static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
160 /* We want more bytes than seem to be available.
161 * Maybe we need a new page, maybe we have just run out
163 unsigned int avail = (char *)argp->end - (char *)argp->p;
166 if (argp->pagelen == 0) {
167 struct kvec *vec = &argp->rqstp->rq_arg.tail[0];
171 avail = vec->iov_len;
172 argp->p = vec->iov_base;
173 argp->end = vec->iov_base + avail;
180 argp->p += XDR_QUADLEN(nbytes);
184 if (avail + argp->pagelen < nbytes)
186 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */
188 /* ok, we can do it with the current plus the next page */
189 if (nbytes <= sizeof(argp->tmp))
193 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL);
199 * The following memcpy is safe because read_buf is always
200 * called with nbytes > avail, and the two cases above both
201 * guarantee p points to at least nbytes bytes.
203 memcpy(p, argp->p, avail);
204 next_decode_page(argp);
205 memcpy(((char*)p)+avail, argp->p, (nbytes - avail));
206 argp->p += XDR_QUADLEN(nbytes - avail);
210 static unsigned int compoundargs_bytes_left(struct nfsd4_compoundargs *argp)
212 unsigned int this = (char *)argp->end - (char *)argp->p;
214 return this + argp->pagelen;
217 static int zero_clientid(clientid_t *clid)
219 return (clid->cl_boot == 0) && (clid->cl_id == 0);
223 * svcxdr_tmpalloc - allocate memory to be freed after compound processing
224 * @argp: NFSv4 compound argument structure
225 * @len: length of buffer to allocate
227 * Allocates a buffer of size @len to be freed when processing the compound
228 * operation described in @argp finishes.
231 svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len)
233 struct svcxdr_tmpbuf *tb;
235 tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL);
238 tb->next = argp->to_free;
244 * For xdr strings that need to be passed to other kernel api's
245 * as null-terminated strings.
247 * Note null-terminating in place usually isn't safe since the
248 * buffer might end on a page boundary.
251 svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len)
253 char *p = svcxdr_tmpalloc(argp, len + 1);
263 svcxdr_construct_vector(struct nfsd4_compoundargs *argp, struct kvec *head,
264 struct page ***pagelist, u32 buflen)
270 /* Sorry .. no magic macros for this.. *
271 * READ_BUF(write->wr_buflen);
272 * SAVEMEM(write->wr_buf, write->wr_buflen);
274 avail = (char *)argp->end - (char *)argp->p;
275 if (avail + argp->pagelen < buflen) {
276 dprintk("NFSD: xdr error (%s:%d)\n",
278 return nfserr_bad_xdr;
280 head->iov_base = argp->p;
281 head->iov_len = avail;
282 *pagelist = argp->pagelist;
284 len = XDR_QUADLEN(buflen) << 2;
288 pages = len >> PAGE_SHIFT;
289 argp->pagelist += pages;
290 argp->pagelen -= pages * PAGE_SIZE;
291 len -= pages * PAGE_SIZE;
293 next_decode_page(argp);
295 argp->p += XDR_QUADLEN(len);
301 * savemem - duplicate a chunk of memory for later processing
302 * @argp: NFSv4 compound argument structure to be freed with
303 * @p: pointer to be duplicated
304 * @nbytes: length to be duplicated
306 * Returns a pointer to a copy of @nbytes bytes of memory at @p
307 * that are preserved until processing of the NFSv4 compound
308 * operation described by @argp finishes.
310 static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
314 ret = svcxdr_tmpalloc(argp, nbytes);
317 memcpy(ret, p, nbytes);
322 nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
327 p = xdr_decode_hyper(p, &tv->tv_sec);
328 tv->tv_nsec = be32_to_cpup(p++);
329 if (tv->tv_nsec >= (u32)1000000000)
336 nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
346 bmlen = be32_to_cpup(p++);
350 READ_BUF(bmlen << 2);
352 bmval[0] = be32_to_cpup(p++);
354 bmval[1] = be32_to_cpup(p++);
356 bmval[2] = be32_to_cpup(p++);
362 nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
363 struct iattr *iattr, struct nfs4_acl **acl,
364 struct xdr_netobj *label, int *umask)
366 int expected_len, len = 0;
372 if ((status = nfsd4_decode_bitmap(argp, bmval)))
375 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0
376 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1
377 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) {
378 if (nfsd_attrs_supported(argp->minorversion, bmval))
380 return nfserr_attrnotsupp;
384 expected_len = be32_to_cpup(p++);
386 if (bmval[0] & FATTR4_WORD0_SIZE) {
389 p = xdr_decode_hyper(p, &iattr->ia_size);
390 iattr->ia_valid |= ATTR_SIZE;
392 if (bmval[0] & FATTR4_WORD0_ACL) {
394 struct nfs4_ace *ace;
396 READ_BUF(4); len += 4;
397 nace = be32_to_cpup(p++);
399 if (nace > compoundargs_bytes_left(argp)/20)
401 * Even with 4-byte names there wouldn't be
402 * space for that many aces; something fishy is
407 *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace));
409 return nfserr_jukebox;
411 (*acl)->naces = nace;
412 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) {
413 READ_BUF(16); len += 16;
414 ace->type = be32_to_cpup(p++);
415 ace->flag = be32_to_cpup(p++);
416 ace->access_mask = be32_to_cpup(p++);
417 dummy32 = be32_to_cpup(p++);
419 len += XDR_QUADLEN(dummy32) << 2;
420 READMEM(buf, dummy32);
421 ace->whotype = nfs4_acl_get_whotype(buf, dummy32);
423 if (ace->whotype != NFS4_ACL_WHO_NAMED)
425 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
426 status = nfsd_map_name_to_gid(argp->rqstp,
427 buf, dummy32, &ace->who_gid);
429 status = nfsd_map_name_to_uid(argp->rqstp,
430 buf, dummy32, &ace->who_uid);
436 if (bmval[1] & FATTR4_WORD1_MODE) {
439 iattr->ia_mode = be32_to_cpup(p++);
440 iattr->ia_mode &= (S_IFMT | S_IALLUGO);
441 iattr->ia_valid |= ATTR_MODE;
443 if (bmval[1] & FATTR4_WORD1_OWNER) {
446 dummy32 = be32_to_cpup(p++);
448 len += (XDR_QUADLEN(dummy32) << 2);
449 READMEM(buf, dummy32);
450 if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid)))
452 iattr->ia_valid |= ATTR_UID;
454 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) {
457 dummy32 = be32_to_cpup(p++);
459 len += (XDR_QUADLEN(dummy32) << 2);
460 READMEM(buf, dummy32);
461 if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid)))
463 iattr->ia_valid |= ATTR_GID;
465 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) {
468 dummy32 = be32_to_cpup(p++);
470 case NFS4_SET_TO_CLIENT_TIME:
472 status = nfsd4_decode_time(argp, &iattr->ia_atime);
475 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
477 case NFS4_SET_TO_SERVER_TIME:
478 iattr->ia_valid |= ATTR_ATIME;
484 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) {
487 dummy32 = be32_to_cpup(p++);
489 case NFS4_SET_TO_CLIENT_TIME:
491 status = nfsd4_decode_time(argp, &iattr->ia_mtime);
494 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
496 case NFS4_SET_TO_SERVER_TIME:
497 iattr->ia_valid |= ATTR_MTIME;
505 if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) &&
506 bmval[2] & FATTR4_WORD2_SECURITY_LABEL) {
509 dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */
512 dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */
515 dummy32 = be32_to_cpup(p++);
517 if (dummy32 > NFS4_MAXLABELLEN)
518 return nfserr_badlabel;
519 len += (XDR_QUADLEN(dummy32) << 2);
520 READMEM(buf, dummy32);
521 label->len = dummy32;
522 label->data = svcxdr_dupstr(argp, buf, dummy32);
524 return nfserr_jukebox;
526 if (bmval[2] & FATTR4_WORD2_MODE_UMASK) {
531 dummy32 = be32_to_cpup(p++);
532 iattr->ia_mode = dummy32 & (S_IFMT | S_IALLUGO);
533 dummy32 = be32_to_cpup(p++);
534 *umask = dummy32 & S_IRWXUGO;
535 iattr->ia_valid |= ATTR_MODE;
537 if (len != expected_len)
544 nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid)
548 READ_BUF(sizeof(stateid_t));
549 sid->si_generation = be32_to_cpup(p++);
550 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t));
556 nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access)
561 access->ac_req_access = be32_to_cpup(p++);
566 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
569 struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
575 /* callback_sec_params4 */
577 nr_secflavs = be32_to_cpup(p++);
579 cbs->flavor = (u32)(-1);
581 /* Is this legal? Be generous, take it to mean AUTH_NONE: */
583 for (i = 0; i < nr_secflavs; ++i) {
585 dummy = be32_to_cpup(p++);
588 /* Nothing to read */
589 if (cbs->flavor == (u32)(-1))
590 cbs->flavor = RPC_AUTH_NULL;
595 dummy = be32_to_cpup(p++);
598 dummy = be32_to_cpup(p++);
600 SAVEMEM(machine_name, dummy);
604 uid = be32_to_cpup(p++);
605 gid = be32_to_cpup(p++);
609 dummy = be32_to_cpup(p++);
611 if (cbs->flavor == (u32)(-1)) {
612 kuid_t kuid = make_kuid(userns, uid);
613 kgid_t kgid = make_kgid(userns, gid);
614 if (uid_valid(kuid) && gid_valid(kgid)) {
617 cbs->flavor = RPC_AUTH_UNIX;
619 dprintk("RPC_AUTH_UNIX with invalid"
620 "uid or gid ignoring!\n");
625 dprintk("RPC_AUTH_GSS callback secflavor "
629 dummy = be32_to_cpup(p++);
630 /* gcbp_handle_from_server */
631 dummy = be32_to_cpup(p++);
633 p += XDR_QUADLEN(dummy);
634 /* gcbp_handle_from_client */
636 dummy = be32_to_cpup(p++);
640 dprintk("Illegal callback secflavor\n");
647 static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc)
652 bc->bc_cb_program = be32_to_cpup(p++);
653 nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec);
658 static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts)
662 READ_BUF(NFS4_MAX_SESSIONID_LEN + 8);
663 COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN);
664 bcts->dir = be32_to_cpup(p++);
665 /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker
666 * could help us figure out we should be using it. */
671 nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close)
676 close->cl_seqid = be32_to_cpup(p++);
677 return nfsd4_decode_stateid(argp, &close->cl_stateid);
684 nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit)
689 p = xdr_decode_hyper(p, &commit->co_offset);
690 commit->co_count = be32_to_cpup(p++);
696 nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create)
701 create->cr_type = be32_to_cpup(p++);
702 switch (create->cr_type) {
705 create->cr_datalen = be32_to_cpup(p++);
706 READ_BUF(create->cr_datalen);
707 create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen);
708 if (!create->cr_data)
709 return nfserr_jukebox;
714 create->cr_specdata1 = be32_to_cpup(p++);
715 create->cr_specdata2 = be32_to_cpup(p++);
725 create->cr_namelen = be32_to_cpup(p++);
726 READ_BUF(create->cr_namelen);
727 SAVEMEM(create->cr_name, create->cr_namelen);
728 if ((status = check_filename(create->cr_name, create->cr_namelen)))
731 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr,
732 &create->cr_acl, &create->cr_label,
741 nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr)
743 return nfsd4_decode_stateid(argp, &dr->dr_stateid);
747 nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr)
749 return nfsd4_decode_bitmap(argp, getattr->ga_bmval);
753 nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link)
758 link->li_namelen = be32_to_cpup(p++);
759 READ_BUF(link->li_namelen);
760 SAVEMEM(link->li_name, link->li_namelen);
761 if ((status = check_filename(link->li_name, link->li_namelen)))
768 nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock)
773 * type, reclaim(boolean), offset, length, new_lock_owner(boolean)
776 lock->lk_type = be32_to_cpup(p++);
777 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT))
779 lock->lk_reclaim = be32_to_cpup(p++);
780 p = xdr_decode_hyper(p, &lock->lk_offset);
781 p = xdr_decode_hyper(p, &lock->lk_length);
782 lock->lk_is_new = be32_to_cpup(p++);
784 if (lock->lk_is_new) {
786 lock->lk_new_open_seqid = be32_to_cpup(p++);
787 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid);
790 READ_BUF(8 + sizeof(clientid_t));
791 lock->lk_new_lock_seqid = be32_to_cpup(p++);
792 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t));
793 lock->lk_new_owner.len = be32_to_cpup(p++);
794 READ_BUF(lock->lk_new_owner.len);
795 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len);
797 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid);
801 lock->lk_old_lock_seqid = be32_to_cpup(p++);
808 nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt)
813 lockt->lt_type = be32_to_cpup(p++);
814 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT))
816 p = xdr_decode_hyper(p, &lockt->lt_offset);
817 p = xdr_decode_hyper(p, &lockt->lt_length);
818 COPYMEM(&lockt->lt_clientid, 8);
819 lockt->lt_owner.len = be32_to_cpup(p++);
820 READ_BUF(lockt->lt_owner.len);
821 READMEM(lockt->lt_owner.data, lockt->lt_owner.len);
827 nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku)
832 locku->lu_type = be32_to_cpup(p++);
833 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT))
835 locku->lu_seqid = be32_to_cpup(p++);
836 status = nfsd4_decode_stateid(argp, &locku->lu_stateid);
840 p = xdr_decode_hyper(p, &locku->lu_offset);
841 p = xdr_decode_hyper(p, &locku->lu_length);
847 nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup)
852 lookup->lo_len = be32_to_cpup(p++);
853 READ_BUF(lookup->lo_len);
854 SAVEMEM(lookup->lo_name, lookup->lo_len);
855 if ((status = check_filename(lookup->lo_name, lookup->lo_len)))
861 static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when)
867 w = be32_to_cpup(p++);
868 *share_access = w & NFS4_SHARE_ACCESS_MASK;
869 *deleg_want = w & NFS4_SHARE_WANT_MASK;
871 *deleg_when = w & NFS4_SHARE_WHEN_MASK;
873 switch (w & NFS4_SHARE_ACCESS_MASK) {
874 case NFS4_SHARE_ACCESS_READ:
875 case NFS4_SHARE_ACCESS_WRITE:
876 case NFS4_SHARE_ACCESS_BOTH:
879 return nfserr_bad_xdr;
881 w &= ~NFS4_SHARE_ACCESS_MASK;
884 if (!argp->minorversion)
885 return nfserr_bad_xdr;
886 switch (w & NFS4_SHARE_WANT_MASK) {
887 case NFS4_SHARE_WANT_NO_PREFERENCE:
888 case NFS4_SHARE_WANT_READ_DELEG:
889 case NFS4_SHARE_WANT_WRITE_DELEG:
890 case NFS4_SHARE_WANT_ANY_DELEG:
891 case NFS4_SHARE_WANT_NO_DELEG:
892 case NFS4_SHARE_WANT_CANCEL:
895 return nfserr_bad_xdr;
897 w &= ~NFS4_SHARE_WANT_MASK;
901 if (!deleg_when) /* open_downgrade */
904 case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL:
905 case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED:
906 case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL |
907 NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED):
911 return nfserr_bad_xdr;
914 static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x)
919 *x = be32_to_cpup(p++);
920 /* Note: unlinke access bits, deny bits may be zero. */
921 if (*x & ~NFS4_SHARE_DENY_BOTH)
922 return nfserr_bad_xdr;
925 return nfserr_bad_xdr;
928 static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o)
933 o->len = be32_to_cpup(p++);
935 if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT)
936 return nfserr_bad_xdr;
939 SAVEMEM(o->data, o->len);
942 return nfserr_bad_xdr;
946 nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open)
951 memset(open->op_bmval, 0, sizeof(open->op_bmval));
952 open->op_iattr.ia_valid = 0;
953 open->op_openowner = NULL;
955 open->op_xdr_error = 0;
956 /* seqid, share_access, share_deny, clientid, ownerlen */
958 open->op_seqid = be32_to_cpup(p++);
959 /* decode, yet ignore deleg_when until supported */
960 status = nfsd4_decode_share_access(argp, &open->op_share_access,
961 &open->op_deleg_want, &dummy);
964 status = nfsd4_decode_share_deny(argp, &open->op_share_deny);
967 READ_BUF(sizeof(clientid_t));
968 COPYMEM(&open->op_clientid, sizeof(clientid_t));
969 status = nfsd4_decode_opaque(argp, &open->op_owner);
973 open->op_create = be32_to_cpup(p++);
974 switch (open->op_create) {
975 case NFS4_OPEN_NOCREATE:
977 case NFS4_OPEN_CREATE:
979 open->op_createmode = be32_to_cpup(p++);
980 switch (open->op_createmode) {
981 case NFS4_CREATE_UNCHECKED:
982 case NFS4_CREATE_GUARDED:
983 status = nfsd4_decode_fattr(argp, open->op_bmval,
984 &open->op_iattr, &open->op_acl, &open->op_label,
989 case NFS4_CREATE_EXCLUSIVE:
990 READ_BUF(NFS4_VERIFIER_SIZE);
991 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
993 case NFS4_CREATE_EXCLUSIVE4_1:
994 if (argp->minorversion < 1)
996 READ_BUF(NFS4_VERIFIER_SIZE);
997 COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE);
998 status = nfsd4_decode_fattr(argp, open->op_bmval,
999 &open->op_iattr, &open->op_acl, &open->op_label,
1014 open->op_claim_type = be32_to_cpup(p++);
1015 switch (open->op_claim_type) {
1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 open->op_fname.len = be32_to_cpup(p++);
1020 READ_BUF(open->op_fname.len);
1021 SAVEMEM(open->op_fname.data, open->op_fname.len);
1022 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1025 case NFS4_OPEN_CLAIM_PREVIOUS:
1027 open->op_delegate_type = be32_to_cpup(p++);
1029 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1030 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1034 open->op_fname.len = be32_to_cpup(p++);
1035 READ_BUF(open->op_fname.len);
1036 SAVEMEM(open->op_fname.data, open->op_fname.len);
1037 if ((status = check_filename(open->op_fname.data, open->op_fname.len)))
1040 case NFS4_OPEN_CLAIM_FH:
1041 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1042 if (argp->minorversion < 1)
1046 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1047 if (argp->minorversion < 1)
1049 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid);
1061 nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf)
1065 if (argp->minorversion >= 1)
1066 return nfserr_notsupp;
1068 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid);
1072 open_conf->oc_seqid = be32_to_cpup(p++);
1078 nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down)
1082 status = nfsd4_decode_stateid(argp, &open_down->od_stateid);
1086 open_down->od_seqid = be32_to_cpup(p++);
1087 status = nfsd4_decode_share_access(argp, &open_down->od_share_access,
1088 &open_down->od_deleg_want, NULL);
1091 status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny);
1098 nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh)
1103 putfh->pf_fhlen = be32_to_cpup(p++);
1104 if (putfh->pf_fhlen > NFS4_FHSIZE)
1106 READ_BUF(putfh->pf_fhlen);
1107 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen);
1113 nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p)
1115 if (argp->minorversion == 0)
1117 return nfserr_notsupp;
1121 nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read)
1125 status = nfsd4_decode_stateid(argp, &read->rd_stateid);
1129 p = xdr_decode_hyper(p, &read->rd_offset);
1130 read->rd_length = be32_to_cpup(p++);
1136 nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir)
1141 p = xdr_decode_hyper(p, &readdir->rd_cookie);
1142 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data));
1143 readdir->rd_dircount = be32_to_cpup(p++);
1144 readdir->rd_maxcount = be32_to_cpup(p++);
1145 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval)))
1152 nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove)
1157 remove->rm_namelen = be32_to_cpup(p++);
1158 READ_BUF(remove->rm_namelen);
1159 SAVEMEM(remove->rm_name, remove->rm_namelen);
1160 if ((status = check_filename(remove->rm_name, remove->rm_namelen)))
1167 nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename)
1172 rename->rn_snamelen = be32_to_cpup(p++);
1173 READ_BUF(rename->rn_snamelen);
1174 SAVEMEM(rename->rn_sname, rename->rn_snamelen);
1176 rename->rn_tnamelen = be32_to_cpup(p++);
1177 READ_BUF(rename->rn_tnamelen);
1178 SAVEMEM(rename->rn_tname, rename->rn_tnamelen);
1179 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen)))
1181 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen)))
1188 nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid)
1192 if (argp->minorversion >= 1)
1193 return nfserr_notsupp;
1195 READ_BUF(sizeof(clientid_t));
1196 COPYMEM(clientid, sizeof(clientid_t));
1202 nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp,
1203 struct nfsd4_secinfo *secinfo)
1208 secinfo->si_namelen = be32_to_cpup(p++);
1209 READ_BUF(secinfo->si_namelen);
1210 SAVEMEM(secinfo->si_name, secinfo->si_namelen);
1211 status = check_filename(secinfo->si_name, secinfo->si_namelen);
1218 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp,
1219 struct nfsd4_secinfo_no_name *sin)
1224 sin->sin_style = be32_to_cpup(p++);
1229 nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr)
1233 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid);
1236 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr,
1237 &setattr->sa_acl, &setattr->sa_label, NULL);
1241 nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid)
1245 if (argp->minorversion >= 1)
1246 return nfserr_notsupp;
1248 READ_BUF(NFS4_VERIFIER_SIZE);
1249 COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE);
1251 status = nfsd4_decode_opaque(argp, &setclientid->se_name);
1253 return nfserr_bad_xdr;
1255 setclientid->se_callback_prog = be32_to_cpup(p++);
1256 setclientid->se_callback_netid_len = be32_to_cpup(p++);
1257 READ_BUF(setclientid->se_callback_netid_len);
1258 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len);
1260 setclientid->se_callback_addr_len = be32_to_cpup(p++);
1262 READ_BUF(setclientid->se_callback_addr_len);
1263 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len);
1265 setclientid->se_callback_ident = be32_to_cpup(p++);
1271 nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c)
1275 if (argp->minorversion >= 1)
1276 return nfserr_notsupp;
1278 READ_BUF(8 + NFS4_VERIFIER_SIZE);
1279 COPYMEM(&scd_c->sc_clientid, 8);
1280 COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE);
1285 /* Also used for NVERIFY */
1287 nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify)
1291 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval)))
1294 /* For convenience's sake, we compare raw xdr'd attributes in
1295 * nfsd4_proc_verify */
1298 verify->ve_attrlen = be32_to_cpup(p++);
1299 READ_BUF(verify->ve_attrlen);
1300 SAVEMEM(verify->ve_attrval, verify->ve_attrlen);
1306 nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
1310 status = nfsd4_decode_stateid(argp, &write->wr_stateid);
1314 p = xdr_decode_hyper(p, &write->wr_offset);
1315 write->wr_stable_how = be32_to_cpup(p++);
1316 if (write->wr_stable_how > NFS_FILE_SYNC)
1318 write->wr_buflen = be32_to_cpup(p++);
1320 status = svcxdr_construct_vector(argp, &write->wr_head,
1321 &write->wr_pagelist, write->wr_buflen);
1329 nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner)
1333 if (argp->minorversion >= 1)
1334 return nfserr_notsupp;
1337 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t));
1338 rlockowner->rl_owner.len = be32_to_cpup(p++);
1339 READ_BUF(rlockowner->rl_owner.len);
1340 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len);
1342 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid))
1343 return nfserr_inval;
1348 nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
1349 struct nfsd4_exchange_id *exid)
1354 READ_BUF(NFS4_VERIFIER_SIZE);
1355 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE);
1357 status = nfsd4_decode_opaque(argp, &exid->clname);
1359 return nfserr_bad_xdr;
1362 exid->flags = be32_to_cpup(p++);
1364 /* Ignore state_protect4_a */
1366 exid->spa_how = be32_to_cpup(p++);
1367 switch (exid->spa_how) {
1371 /* spo_must_enforce */
1372 status = nfsd4_decode_bitmap(argp,
1373 exid->spo_must_enforce);
1376 /* spo_must_allow */
1377 status = nfsd4_decode_bitmap(argp, exid->spo_must_allow);
1384 dummy = be32_to_cpup(p++);
1385 READ_BUF(dummy * 4);
1389 dummy = be32_to_cpup(p++);
1390 READ_BUF(dummy * 4);
1393 /* ssp_hash_algs<> */
1395 tmp = be32_to_cpup(p++);
1398 dummy = be32_to_cpup(p++);
1400 p += XDR_QUADLEN(dummy);
1403 /* ssp_encr_algs<> */
1405 tmp = be32_to_cpup(p++);
1408 dummy = be32_to_cpup(p++);
1410 p += XDR_QUADLEN(dummy);
1413 /* ignore ssp_window and ssp_num_gss_handles: */
1420 READ_BUF(4); /* nfs_impl_id4 array length */
1421 dummy = be32_to_cpup(p++);
1427 status = nfsd4_decode_opaque(argp, &exid->nii_domain);
1432 status = nfsd4_decode_opaque(argp, &exid->nii_name);
1437 status = nfsd4_decode_time(argp, &exid->nii_time);
1445 nfsd4_decode_create_session(struct nfsd4_compoundargs *argp,
1446 struct nfsd4_create_session *sess)
1451 COPYMEM(&sess->clientid, 8);
1452 sess->seqid = be32_to_cpup(p++);
1453 sess->flags = be32_to_cpup(p++);
1455 /* Fore channel attrs */
1457 p++; /* headerpadsz is always 0 */
1458 sess->fore_channel.maxreq_sz = be32_to_cpup(p++);
1459 sess->fore_channel.maxresp_sz = be32_to_cpup(p++);
1460 sess->fore_channel.maxresp_cached = be32_to_cpup(p++);
1461 sess->fore_channel.maxops = be32_to_cpup(p++);
1462 sess->fore_channel.maxreqs = be32_to_cpup(p++);
1463 sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++);
1464 if (sess->fore_channel.nr_rdma_attrs == 1) {
1466 sess->fore_channel.rdma_attrs = be32_to_cpup(p++);
1467 } else if (sess->fore_channel.nr_rdma_attrs > 1) {
1468 dprintk("Too many fore channel attr bitmaps!\n");
1472 /* Back channel attrs */
1474 p++; /* headerpadsz is always 0 */
1475 sess->back_channel.maxreq_sz = be32_to_cpup(p++);
1476 sess->back_channel.maxresp_sz = be32_to_cpup(p++);
1477 sess->back_channel.maxresp_cached = be32_to_cpup(p++);
1478 sess->back_channel.maxops = be32_to_cpup(p++);
1479 sess->back_channel.maxreqs = be32_to_cpup(p++);
1480 sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++);
1481 if (sess->back_channel.nr_rdma_attrs == 1) {
1483 sess->back_channel.rdma_attrs = be32_to_cpup(p++);
1484 } else if (sess->back_channel.nr_rdma_attrs > 1) {
1485 dprintk("Too many back channel attr bitmaps!\n");
1490 sess->callback_prog = be32_to_cpup(p++);
1491 nfsd4_decode_cb_sec(argp, &sess->cb_sec);
1496 nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp,
1497 struct nfsd4_destroy_session *destroy_session)
1500 READ_BUF(NFS4_MAX_SESSIONID_LEN);
1501 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1507 nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp,
1508 struct nfsd4_free_stateid *free_stateid)
1512 READ_BUF(sizeof(stateid_t));
1513 free_stateid->fr_stateid.si_generation = be32_to_cpup(p++);
1514 COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t));
1520 nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
1521 struct nfsd4_sequence *seq)
1525 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16);
1526 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN);
1527 seq->seqid = be32_to_cpup(p++);
1528 seq->slotid = be32_to_cpup(p++);
1529 seq->maxslots = be32_to_cpup(p++);
1530 seq->cachethis = be32_to_cpup(p++);
1536 nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
1540 struct nfsd4_test_stateid_id *stateid;
1543 test_stateid->ts_num_ids = ntohl(*p++);
1545 INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
1547 for (i = 0; i < test_stateid->ts_num_ids; i++) {
1548 stateid = svcxdr_tmpalloc(argp, sizeof(*stateid));
1550 status = nfserrno(-ENOMEM);
1554 INIT_LIST_HEAD(&stateid->ts_id_list);
1555 list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
1557 status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
1566 dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__);
1567 status = nfserr_bad_xdr;
1571 static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc)
1576 COPYMEM(&dc->clientid, 8);
1581 static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc)
1586 rc->rca_one_fs = be32_to_cpup(p++);
1591 #ifdef CONFIG_NFSD_PNFS
1593 nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp,
1594 struct nfsd4_getdeviceinfo *gdev)
1599 READ_BUF(sizeof(struct nfsd4_deviceid) + 3 * 4);
1600 COPYMEM(&gdev->gd_devid, sizeof(struct nfsd4_deviceid));
1601 gdev->gd_layout_type = be32_to_cpup(p++);
1602 gdev->gd_maxcount = be32_to_cpup(p++);
1603 num = be32_to_cpup(p++);
1608 gdev->gd_notify_types = be32_to_cpup(p++);
1609 for (i = 1; i < num; i++) {
1610 if (be32_to_cpup(p++)) {
1611 status = nfserr_inval;
1620 nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp,
1621 struct nfsd4_layoutget *lgp)
1626 lgp->lg_signal = be32_to_cpup(p++);
1627 lgp->lg_layout_type = be32_to_cpup(p++);
1628 lgp->lg_seg.iomode = be32_to_cpup(p++);
1629 p = xdr_decode_hyper(p, &lgp->lg_seg.offset);
1630 p = xdr_decode_hyper(p, &lgp->lg_seg.length);
1631 p = xdr_decode_hyper(p, &lgp->lg_minlength);
1633 status = nfsd4_decode_stateid(argp, &lgp->lg_sid);
1638 lgp->lg_maxcount = be32_to_cpup(p++);
1644 nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp,
1645 struct nfsd4_layoutcommit *lcp)
1651 p = xdr_decode_hyper(p, &lcp->lc_seg.offset);
1652 p = xdr_decode_hyper(p, &lcp->lc_seg.length);
1653 lcp->lc_reclaim = be32_to_cpup(p++);
1655 status = nfsd4_decode_stateid(argp, &lcp->lc_sid);
1660 lcp->lc_newoffset = be32_to_cpup(p++);
1661 if (lcp->lc_newoffset) {
1663 p = xdr_decode_hyper(p, &lcp->lc_last_wr);
1665 lcp->lc_last_wr = 0;
1667 timechange = be32_to_cpup(p++);
1669 status = nfsd4_decode_time(argp, &lcp->lc_mtime);
1673 lcp->lc_mtime.tv_nsec = UTIME_NOW;
1676 lcp->lc_layout_type = be32_to_cpup(p++);
1679 * Save the layout update in XDR format and let the layout driver deal
1682 lcp->lc_up_len = be32_to_cpup(p++);
1683 if (lcp->lc_up_len > 0) {
1684 READ_BUF(lcp->lc_up_len);
1685 READMEM(lcp->lc_up_layout, lcp->lc_up_len);
1692 nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp,
1693 struct nfsd4_layoutreturn *lrp)
1698 lrp->lr_reclaim = be32_to_cpup(p++);
1699 lrp->lr_layout_type = be32_to_cpup(p++);
1700 lrp->lr_seg.iomode = be32_to_cpup(p++);
1701 lrp->lr_return_type = be32_to_cpup(p++);
1702 if (lrp->lr_return_type == RETURN_FILE) {
1704 p = xdr_decode_hyper(p, &lrp->lr_seg.offset);
1705 p = xdr_decode_hyper(p, &lrp->lr_seg.length);
1707 status = nfsd4_decode_stateid(argp, &lrp->lr_sid);
1712 lrp->lrf_body_len = be32_to_cpup(p++);
1713 if (lrp->lrf_body_len > 0) {
1714 READ_BUF(lrp->lrf_body_len);
1715 READMEM(lrp->lrf_body, lrp->lrf_body_len);
1718 lrp->lr_seg.offset = 0;
1719 lrp->lr_seg.length = NFS4_MAX_UINT64;
1724 #endif /* CONFIG_NFSD_PNFS */
1727 nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp,
1728 struct nfsd4_fallocate *fallocate)
1732 status = nfsd4_decode_stateid(argp, &fallocate->falloc_stateid);
1737 p = xdr_decode_hyper(p, &fallocate->falloc_offset);
1738 xdr_decode_hyper(p, &fallocate->falloc_length);
1744 nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone)
1748 status = nfsd4_decode_stateid(argp, &clone->cl_src_stateid);
1751 status = nfsd4_decode_stateid(argp, &clone->cl_dst_stateid);
1755 READ_BUF(8 + 8 + 8);
1756 p = xdr_decode_hyper(p, &clone->cl_src_pos);
1757 p = xdr_decode_hyper(p, &clone->cl_dst_pos);
1758 p = xdr_decode_hyper(p, &clone->cl_count);
1762 static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp,
1763 struct nl4_server *ns)
1766 struct nfs42_netaddr *naddr;
1769 ns->nl4_type = be32_to_cpup(p++);
1771 /* currently support for 1 inter-server source server */
1772 switch (ns->nl4_type) {
1774 naddr = &ns->u.nl4_addr;
1777 naddr->netid_len = be32_to_cpup(p++);
1778 if (naddr->netid_len > RPCBIND_MAXNETIDLEN)
1781 READ_BUF(naddr->netid_len + 4); /* 4 for uaddr len */
1782 COPYMEM(naddr->netid, naddr->netid_len);
1784 naddr->addr_len = be32_to_cpup(p++);
1785 if (naddr->addr_len > RPCBIND_MAXUADDRLEN)
1788 READ_BUF(naddr->addr_len);
1789 COPYMEM(naddr->addr, naddr->addr_len);
1798 nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy)
1801 struct nl4_server *ns_dummy;
1804 status = nfsd4_decode_stateid(argp, ©->cp_src_stateid);
1807 status = nfsd4_decode_stateid(argp, ©->cp_dst_stateid);
1811 READ_BUF(8 + 8 + 8 + 4 + 4 + 4);
1812 p = xdr_decode_hyper(p, ©->cp_src_pos);
1813 p = xdr_decode_hyper(p, ©->cp_dst_pos);
1814 p = xdr_decode_hyper(p, ©->cp_count);
1815 p++; /* ca_consecutive: we always do consecutive copies */
1816 copy->cp_synchronous = be32_to_cpup(p++);
1818 count = be32_to_cpup(p++);
1820 copy->cp_intra = false;
1821 if (count == 0) { /* intra-server copy */
1822 copy->cp_intra = true;
1826 /* decode all the supplied server addresses but use first */
1827 status = nfsd4_decode_nl4_server(argp, ©->cp_src);
1831 ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL);
1832 if (ns_dummy == NULL)
1833 return nfserrno(-ENOMEM);
1834 for (i = 0; i < count - 1; i++) {
1835 status = nfsd4_decode_nl4_server(argp, ns_dummy);
1848 nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp,
1849 struct nfsd4_offload_status *os)
1851 return nfsd4_decode_stateid(argp, &os->stateid);
1855 nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp,
1856 struct nfsd4_copy_notify *cn)
1860 status = nfsd4_decode_stateid(argp, &cn->cpn_src_stateid);
1863 return nfsd4_decode_nl4_server(argp, &cn->cpn_dst);
1867 nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek)
1871 status = nfsd4_decode_stateid(argp, &seek->seek_stateid);
1876 p = xdr_decode_hyper(p, &seek->seek_offset);
1877 seek->seek_whence = be32_to_cpup(p);
1883 * XDR data that is more than PAGE_SIZE in size is normally part of a
1884 * read or write. However, the size of extended attributes is limited
1885 * by the maximum request size, and then further limited by the underlying
1886 * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX
1887 * is 64k). Since there is no kvec- or page-based interface to xattrs,
1888 * and we're not dealing with contiguous pages, we need to do some copying.
1892 * Decode data into buffer. Uses head and pages constructed by
1893 * svcxdr_construct_vector.
1896 nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct kvec *head,
1897 struct page **pages, char **bufp, u32 buflen)
1902 if (buflen <= head->iov_len) {
1904 * We're in luck, the head has enough space. Just return
1905 * the head, no need for copying.
1907 *bufp = head->iov_base;
1911 tmp = svcxdr_tmpalloc(argp, buflen);
1913 return nfserr_jukebox;
1916 memcpy(dp, head->iov_base, head->iov_len);
1917 buflen -= head->iov_len;
1918 dp += head->iov_len;
1920 while (buflen > 0) {
1921 len = min_t(u32, buflen, PAGE_SIZE);
1922 memcpy(dp, page_address(*pages), len);
1934 * Get a user extended attribute name from the XDR buffer.
1935 * It will not have the "user." prefix, so prepend it.
1936 * Lastly, check for nul characters in the name.
1939 nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep)
1942 char *name, *sp, *dp;
1946 namelen = be32_to_cpup(p++);
1948 if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN))
1949 return nfserr_nametoolong;
1956 name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1);
1958 return nfserr_jukebox;
1960 memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
1963 * Copy the extended attribute name over while checking for 0
1967 dp = name + XATTR_USER_PREFIX_LEN;
1983 * A GETXATTR op request comes without a length specifier. We just set the
1984 * maximum length for the reply based on XATTR_SIZE_MAX and the maximum
1985 * channel reply size. nfsd_getxattr will probe the length of the xattr,
1986 * check it against getxa_len, and allocate + return the value.
1989 nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp,
1990 struct nfsd4_getxattr *getxattr)
1995 status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name);
1999 maxcount = svc_max_payload(argp->rqstp);
2000 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2002 getxattr->getxa_len = maxcount;
2008 nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp,
2009 struct nfsd4_setxattr *setxattr)
2012 u32 flags, maxcount, size;
2014 struct page **pagelist;
2017 flags = be32_to_cpup(p++);
2019 if (flags > SETXATTR4_REPLACE)
2020 return nfserr_inval;
2021 setxattr->setxa_flags = flags;
2023 status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name);
2027 maxcount = svc_max_payload(argp->rqstp);
2028 maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount);
2031 size = be32_to_cpup(p++);
2032 if (size > maxcount)
2033 return nfserr_xattr2big;
2035 setxattr->setxa_len = size;
2037 status = svcxdr_construct_vector(argp, &head, &pagelist, size);
2041 status = nfsd4_vbuf_from_vector(argp, &head, pagelist,
2042 &setxattr->setxa_buf, size);
2049 nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp,
2050 struct nfsd4_listxattrs *listxattrs)
2056 p = xdr_decode_hyper(p, &listxattrs->lsxa_cookie);
2059 * If the cookie is too large to have even one user.x attribute
2060 * plus trailing '\0' left in a maximum size buffer, it's invalid.
2062 if (listxattrs->lsxa_cookie >=
2063 (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2)))
2064 return nfserr_badcookie;
2066 maxcount = be32_to_cpup(p++);
2068 /* Always need at least 2 words (length and one character) */
2069 return nfserr_inval;
2071 maxcount = min(maxcount, svc_max_payload(argp->rqstp));
2072 listxattrs->lsxa_maxcount = maxcount;
2078 nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp,
2079 struct nfsd4_removexattr *removexattr)
2081 return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name);
2085 nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p)
2091 nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p)
2093 return nfserr_notsupp;
2096 typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *);
2098 static const nfsd4_dec nfsd4_dec_ops[] = {
2099 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access,
2100 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close,
2101 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit,
2102 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create,
2103 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp,
2104 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn,
2105 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr,
2106 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop,
2107 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link,
2108 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock,
2109 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt,
2110 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku,
2111 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup,
2112 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop,
2113 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2114 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open,
2115 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp,
2116 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm,
2117 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade,
2118 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh,
2119 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh,
2120 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop,
2121 [OP_READ] = (nfsd4_dec)nfsd4_decode_read,
2122 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir,
2123 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop,
2124 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove,
2125 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename,
2126 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew,
2127 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop,
2128 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop,
2129 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo,
2130 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr,
2131 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid,
2132 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm,
2133 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify,
2134 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write,
2135 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner,
2137 /* new operations for NFSv4.1 */
2138 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl,
2139 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session,
2140 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id,
2141 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session,
2142 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session,
2143 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid,
2144 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2145 #ifdef CONFIG_NFSD_PNFS
2146 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo,
2147 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2148 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit,
2149 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget,
2150 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn,
2152 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp,
2153 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp,
2154 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp,
2155 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp,
2156 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp,
2158 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name,
2159 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence,
2160 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp,
2161 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid,
2162 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp,
2163 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid,
2164 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete,
2166 /* new operations for NFSv4.2 */
2167 [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2168 [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy,
2169 [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify,
2170 [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate,
2171 [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp,
2172 [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp,
2173 [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp,
2174 [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status,
2175 [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status,
2176 [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read,
2177 [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek,
2178 [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp,
2179 [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone,
2180 /* RFC 8276 extended atributes operations */
2181 [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr,
2182 [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr,
2183 [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs,
2184 [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr,
2188 nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op)
2190 if (op->opnum < FIRST_NFS4_OP)
2192 else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP)
2194 else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP)
2196 else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP)
2202 nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
2205 struct nfsd4_op *op;
2206 bool cachethis = false;
2207 int auth_slack= argp->rqstp->rq_auth_slack;
2208 int max_reply = auth_slack + 8; /* opcnt, status */
2214 argp->taglen = be32_to_cpup(p++);
2215 READ_BUF(argp->taglen);
2216 SAVEMEM(argp->tag, argp->taglen);
2218 argp->minorversion = be32_to_cpup(p++);
2219 argp->opcnt = be32_to_cpup(p++);
2220 max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2);
2222 if (argp->taglen > NFSD4_MAX_TAGLEN)
2225 * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS
2226 * here, so we return success at the xdr level so that
2227 * nfsd4_proc can handle this is an NFS-level error.
2229 if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2232 if (argp->opcnt > ARRAY_SIZE(argp->iops)) {
2233 argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL);
2235 argp->ops = argp->iops;
2236 dprintk("nfsd: couldn't allocate room for COMPOUND\n");
2241 if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION)
2244 for (i = 0; i < argp->opcnt; i++) {
2249 op->opnum = be32_to_cpup(p++);
2251 if (nfsd4_opnum_in_range(argp, op))
2252 op->status = nfsd4_dec_ops[op->opnum](argp, &op->u);
2254 op->opnum = OP_ILLEGAL;
2255 op->status = nfserr_op_illegal;
2257 op->opdesc = OPDESC(op);
2259 * We'll try to cache the result in the DRC if any one
2260 * op in the compound wants to be cached:
2262 cachethis |= nfsd4_cache_this_op(op);
2264 if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) {
2266 readbytes += nfsd4_max_reply(argp->rqstp, op);
2268 max_reply += nfsd4_max_reply(argp->rqstp, op);
2270 * OP_LOCK and OP_LOCKT may return a conflicting lock.
2271 * (Special case because it will just skip encoding this
2272 * if it runs out of xdr buffer space, and it is the only
2273 * operation that behaves this way.)
2275 if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT)
2276 max_reply += NFS4_OPAQUE_LIMIT;
2283 /* Sessions make the DRC unnecessary: */
2284 if (argp->minorversion)
2286 svc_reserve(argp->rqstp, max_reply + readbytes);
2287 argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE;
2289 if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack)
2290 clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags);
2295 static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
2296 struct svc_export *exp)
2298 if (exp->ex_flags & NFSEXP_V4ROOT) {
2299 *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
2301 } else if (IS_I_VERSION(inode)) {
2302 p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode));
2304 *p++ = cpu_to_be32(stat->ctime.tv_sec);
2305 *p++ = cpu_to_be32(stat->ctime.tv_nsec);
2311 * ctime (in NFSv4, time_metadata) is not writeable, and the client
2312 * doesn't really care what resolution could theoretically be stored by
2315 * The client cares how close together changes can be while still
2316 * guaranteeing ctime changes. For most filesystems (which have
2317 * timestamps with nanosecond fields) that is limited by the resolution
2318 * of the time returned from current_time() (which I'm assuming to be
2321 static __be32 *encode_time_delta(__be32 *p, struct inode *inode)
2323 struct timespec64 ts;
2326 ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran);
2327 ts = ns_to_timespec64(ns);
2329 p = xdr_encode_hyper(p, ts.tv_sec);
2330 *p++ = cpu_to_be32(ts.tv_nsec);
2335 static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c)
2337 *p++ = cpu_to_be32(c->atomic);
2338 if (c->change_supported) {
2339 p = xdr_encode_hyper(p, c->before_change);
2340 p = xdr_encode_hyper(p, c->after_change);
2342 *p++ = cpu_to_be32(c->before_ctime_sec);
2343 *p++ = cpu_to_be32(c->before_ctime_nsec);
2344 *p++ = cpu_to_be32(c->after_ctime_sec);
2345 *p++ = cpu_to_be32(c->after_ctime_nsec);
2350 /* Encode as an array of strings the string given with components
2351 * separated @sep, escaped with esc_enter and esc_exit.
2353 static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep,
2354 char *components, char esc_enter,
2360 int strlen, count=0;
2361 char *str, *end, *next;
2363 dprintk("nfsd4_encode_components(%s)\n", components);
2365 pathlen_offset = xdr->buf->len;
2366 p = xdr_reserve_space(xdr, 4);
2368 return nfserr_resource;
2369 p++; /* We will fill this in with @count later */
2371 end = str = components;
2373 bool found_esc = false;
2375 /* try to parse as esc_start, ..., esc_end, sep */
2376 if (*str == esc_enter) {
2377 for (; *end && (*end != esc_exit); end++)
2378 /* find esc_exit or end of string */;
2380 if (*end && (!*next || *next == sep)) {
2387 for (; *end && (*end != sep); end++)
2388 /* find sep or end of string */;
2392 p = xdr_reserve_space(xdr, strlen + 4);
2394 return nfserr_resource;
2395 p = xdr_encode_opaque(p, str, strlen);
2405 pathlen = htonl(count);
2406 write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4);
2410 /* Encode as an array of strings the string given with components
2413 static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep,
2416 return nfsd4_encode_components_esc(xdr, sep, components, 0, 0);
2420 * encode a location element of a fs_locations structure
2422 static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr,
2423 struct nfsd4_fs_location *location)
2427 status = nfsd4_encode_components_esc(xdr, ':', location->hosts,
2431 status = nfsd4_encode_components(xdr, '/', location->path);
2438 * Encode a path in RFC3530 'pathname4' format
2440 static __be32 nfsd4_encode_path(struct xdr_stream *xdr,
2441 const struct path *root,
2442 const struct path *path)
2444 struct path cur = *path;
2446 struct dentry **components = NULL;
2447 unsigned int ncomponents = 0;
2448 __be32 err = nfserr_jukebox;
2450 dprintk("nfsd4_encode_components(");
2453 /* First walk the path up to the nfsd root, and store the
2454 * dentries/path components in an array.
2457 if (path_equal(&cur, root))
2459 if (cur.dentry == cur.mnt->mnt_root) {
2460 if (follow_up(&cur))
2464 if ((ncomponents & 15) == 0) {
2465 struct dentry **new;
2466 new = krealloc(components,
2467 sizeof(*new) * (ncomponents + 16),
2473 components[ncomponents++] = cur.dentry;
2474 cur.dentry = dget_parent(cur.dentry);
2476 err = nfserr_resource;
2477 p = xdr_reserve_space(xdr, 4);
2480 *p++ = cpu_to_be32(ncomponents);
2482 while (ncomponents) {
2483 struct dentry *dentry = components[ncomponents - 1];
2486 spin_lock(&dentry->d_lock);
2487 len = dentry->d_name.len;
2488 p = xdr_reserve_space(xdr, len + 4);
2490 spin_unlock(&dentry->d_lock);
2493 p = xdr_encode_opaque(p, dentry->d_name.name, len);
2494 dprintk("/%pd", dentry);
2495 spin_unlock(&dentry->d_lock);
2504 dput(components[--ncomponents]);
2510 static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr,
2511 struct svc_rqst *rqstp, const struct path *path)
2513 struct svc_export *exp_ps;
2516 exp_ps = rqst_find_fsidzero_export(rqstp);
2518 return nfserrno(PTR_ERR(exp_ps));
2519 res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path);
2525 * encode a fs_locations structure
2527 static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr,
2528 struct svc_rqst *rqstp, struct svc_export *exp)
2533 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs;
2535 status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path);
2538 p = xdr_reserve_space(xdr, 4);
2540 return nfserr_resource;
2541 *p++ = cpu_to_be32(fslocs->locations_count);
2542 for (i=0; i<fslocs->locations_count; i++) {
2543 status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]);
2550 static u32 nfs4_file_type(umode_t mode)
2552 switch (mode & S_IFMT) {
2553 case S_IFIFO: return NF4FIFO;
2554 case S_IFCHR: return NF4CHR;
2555 case S_IFDIR: return NF4DIR;
2556 case S_IFBLK: return NF4BLK;
2557 case S_IFLNK: return NF4LNK;
2558 case S_IFREG: return NF4REG;
2559 case S_IFSOCK: return NF4SOCK;
2560 default: return NF4BAD;
2564 static inline __be32
2565 nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2566 struct nfs4_ace *ace)
2568 if (ace->whotype != NFS4_ACL_WHO_NAMED)
2569 return nfs4_acl_write_who(xdr, ace->whotype);
2570 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP)
2571 return nfsd4_encode_group(xdr, rqstp, ace->who_gid);
2573 return nfsd4_encode_user(xdr, rqstp, ace->who_uid);
2576 static inline __be32
2577 nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types)
2580 unsigned long i = hweight_long(layout_types);
2582 p = xdr_reserve_space(xdr, 4 + 4 * i);
2584 return nfserr_resource;
2586 *p++ = cpu_to_be32(i);
2588 for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i)
2589 if (layout_types & (1 << i))
2590 *p++ = cpu_to_be32(i);
2595 #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \
2596 FATTR4_WORD0_RDATTR_ERROR)
2597 #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID
2598 #define WORD2_ABSENT_FS_ATTRS 0
2600 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2601 static inline __be32
2602 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2603 void *context, int len)
2607 p = xdr_reserve_space(xdr, len + 4 + 4 + 4);
2609 return nfserr_resource;
2612 * For now we use a 0 here to indicate the null translation; in
2613 * the future we may place a call to translation code here.
2615 *p++ = cpu_to_be32(0); /* lfs */
2616 *p++ = cpu_to_be32(0); /* pi */
2617 p = xdr_encode_opaque(p, context, len);
2621 static inline __be32
2622 nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp,
2623 void *context, int len)
2627 static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err)
2629 /* As per referral draft: */
2630 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS ||
2631 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) {
2632 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR ||
2633 *bmval0 & FATTR4_WORD0_FS_LOCATIONS)
2634 *rdattr_err = NFSERR_MOVED;
2636 return nfserr_moved;
2638 *bmval0 &= WORD0_ABSENT_FS_ATTRS;
2639 *bmval1 &= WORD1_ABSENT_FS_ATTRS;
2640 *bmval2 &= WORD2_ABSENT_FS_ATTRS;
2645 static int get_parent_attributes(struct svc_export *exp, struct kstat *stat)
2647 struct path path = exp->ex_path;
2651 while (follow_up(&path)) {
2652 if (path.dentry != path.mnt->mnt_root)
2655 err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2661 nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2)
2666 p = xdr_reserve_space(xdr, 16);
2669 *p++ = cpu_to_be32(3);
2670 *p++ = cpu_to_be32(bmval0);
2671 *p++ = cpu_to_be32(bmval1);
2672 *p++ = cpu_to_be32(bmval2);
2673 } else if (bmval1) {
2674 p = xdr_reserve_space(xdr, 12);
2677 *p++ = cpu_to_be32(2);
2678 *p++ = cpu_to_be32(bmval0);
2679 *p++ = cpu_to_be32(bmval1);
2681 p = xdr_reserve_space(xdr, 8);
2684 *p++ = cpu_to_be32(1);
2685 *p++ = cpu_to_be32(bmval0);
2690 return nfserr_resource;
2694 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle
2698 nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
2699 struct svc_export *exp,
2700 struct dentry *dentry, u32 *bmval,
2701 struct svc_rqst *rqstp, int ignore_crossmnt)
2703 u32 bmval0 = bmval[0];
2704 u32 bmval1 = bmval[1];
2705 u32 bmval2 = bmval[2];
2707 struct svc_fh *tempfh = NULL;
2708 struct kstatfs statfs;
2710 int starting_len = xdr->buf->len;
2718 struct nfs4_acl *acl = NULL;
2719 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2720 void *context = NULL;
2723 bool contextsupport = false;
2724 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2725 u32 minorversion = resp->cstate.minorversion;
2726 struct path path = {
2727 .mnt = exp->ex_path.mnt,
2730 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
2732 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1);
2733 BUG_ON(!nfsd_attrs_supported(minorversion, bmval));
2735 if (exp->ex_fslocs.migrated) {
2736 status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err);
2741 err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT);
2744 if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE |
2745 FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) ||
2746 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE |
2747 FATTR4_WORD1_SPACE_TOTAL))) {
2748 err = vfs_statfs(&path, &statfs);
2752 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) {
2753 tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
2754 status = nfserr_jukebox;
2757 fh_init(tempfh, NFS4_FHSIZE);
2758 status = fh_compose(tempfh, exp, dentry, NULL);
2763 if (bmval0 & FATTR4_WORD0_ACL) {
2764 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl);
2765 if (err == -EOPNOTSUPP)
2766 bmval0 &= ~FATTR4_WORD0_ACL;
2767 else if (err == -EINVAL) {
2768 status = nfserr_attrnotsupp;
2770 } else if (err != 0)
2774 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
2775 if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
2776 bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2777 if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
2778 err = security_inode_getsecctx(d_inode(dentry),
2779 &context, &contextlen);
2782 contextsupport = (err == 0);
2783 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
2784 if (err == -EOPNOTSUPP)
2785 bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2790 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
2792 status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2);
2796 attrlen_offset = xdr->buf->len;
2797 p = xdr_reserve_space(xdr, 4);
2800 p++; /* to be backfilled later */
2802 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
2805 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
2807 if (!IS_POSIXACL(dentry->d_inode))
2808 supp[0] &= ~FATTR4_WORD0_ACL;
2809 if (!contextsupport)
2810 supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2812 p = xdr_reserve_space(xdr, 12);
2815 *p++ = cpu_to_be32(2);
2816 *p++ = cpu_to_be32(supp[0]);
2817 *p++ = cpu_to_be32(supp[1]);
2819 p = xdr_reserve_space(xdr, 16);
2822 *p++ = cpu_to_be32(3);
2823 *p++ = cpu_to_be32(supp[0]);
2824 *p++ = cpu_to_be32(supp[1]);
2825 *p++ = cpu_to_be32(supp[2]);
2828 if (bmval0 & FATTR4_WORD0_TYPE) {
2829 p = xdr_reserve_space(xdr, 4);
2832 dummy = nfs4_file_type(stat.mode);
2833 if (dummy == NF4BAD) {
2834 status = nfserr_serverfault;
2837 *p++ = cpu_to_be32(dummy);
2839 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) {
2840 p = xdr_reserve_space(xdr, 4);
2843 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK)
2844 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT);
2846 *p++ = cpu_to_be32(NFS4_FH_PERSISTENT|
2847 NFS4_FH_VOL_RENAME);
2849 if (bmval0 & FATTR4_WORD0_CHANGE) {
2850 p = xdr_reserve_space(xdr, 8);
2853 p = encode_change(p, &stat, d_inode(dentry), exp);
2855 if (bmval0 & FATTR4_WORD0_SIZE) {
2856 p = xdr_reserve_space(xdr, 8);
2859 p = xdr_encode_hyper(p, stat.size);
2861 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) {
2862 p = xdr_reserve_space(xdr, 4);
2865 *p++ = cpu_to_be32(1);
2867 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) {
2868 p = xdr_reserve_space(xdr, 4);
2871 *p++ = cpu_to_be32(1);
2873 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) {
2874 p = xdr_reserve_space(xdr, 4);
2877 *p++ = cpu_to_be32(0);
2879 if (bmval0 & FATTR4_WORD0_FSID) {
2880 p = xdr_reserve_space(xdr, 16);
2883 if (exp->ex_fslocs.migrated) {
2884 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR);
2885 p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR);
2886 } else switch(fsid_source(fhp)) {
2887 case FSIDSOURCE_FSID:
2888 p = xdr_encode_hyper(p, (u64)exp->ex_fsid);
2889 p = xdr_encode_hyper(p, (u64)0);
2891 case FSIDSOURCE_DEV:
2892 *p++ = cpu_to_be32(0);
2893 *p++ = cpu_to_be32(MAJOR(stat.dev));
2894 *p++ = cpu_to_be32(0);
2895 *p++ = cpu_to_be32(MINOR(stat.dev));
2897 case FSIDSOURCE_UUID:
2898 p = xdr_encode_opaque_fixed(p, exp->ex_uuid,
2903 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) {
2904 p = xdr_reserve_space(xdr, 4);
2907 *p++ = cpu_to_be32(0);
2909 if (bmval0 & FATTR4_WORD0_LEASE_TIME) {
2910 p = xdr_reserve_space(xdr, 4);
2913 *p++ = cpu_to_be32(nn->nfsd4_lease);
2915 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) {
2916 p = xdr_reserve_space(xdr, 4);
2919 *p++ = cpu_to_be32(rdattr_err);
2921 if (bmval0 & FATTR4_WORD0_ACL) {
2922 struct nfs4_ace *ace;
2925 p = xdr_reserve_space(xdr, 4);
2929 *p++ = cpu_to_be32(0);
2932 p = xdr_reserve_space(xdr, 4);
2935 *p++ = cpu_to_be32(acl->naces);
2937 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) {
2938 p = xdr_reserve_space(xdr, 4*3);
2941 *p++ = cpu_to_be32(ace->type);
2942 *p++ = cpu_to_be32(ace->flag);
2943 *p++ = cpu_to_be32(ace->access_mask &
2945 status = nfsd4_encode_aclname(xdr, rqstp, ace);
2951 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) {
2952 p = xdr_reserve_space(xdr, 4);
2955 *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ?
2956 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0);
2958 if (bmval0 & FATTR4_WORD0_CANSETTIME) {
2959 p = xdr_reserve_space(xdr, 4);
2962 *p++ = cpu_to_be32(1);
2964 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) {
2965 p = xdr_reserve_space(xdr, 4);
2968 *p++ = cpu_to_be32(0);
2970 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) {
2971 p = xdr_reserve_space(xdr, 4);
2974 *p++ = cpu_to_be32(1);
2976 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) {
2977 p = xdr_reserve_space(xdr, 4);
2980 *p++ = cpu_to_be32(1);
2982 if (bmval0 & FATTR4_WORD0_FILEHANDLE) {
2983 p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4);
2986 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base,
2987 fhp->fh_handle.fh_size);
2989 if (bmval0 & FATTR4_WORD0_FILEID) {
2990 p = xdr_reserve_space(xdr, 8);
2993 p = xdr_encode_hyper(p, stat.ino);
2995 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) {
2996 p = xdr_reserve_space(xdr, 8);
2999 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3001 if (bmval0 & FATTR4_WORD0_FILES_FREE) {
3002 p = xdr_reserve_space(xdr, 8);
3005 p = xdr_encode_hyper(p, (u64) statfs.f_ffree);
3007 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) {
3008 p = xdr_reserve_space(xdr, 8);
3011 p = xdr_encode_hyper(p, (u64) statfs.f_files);
3013 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) {
3014 status = nfsd4_encode_fs_locations(xdr, rqstp, exp);
3018 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) {
3019 p = xdr_reserve_space(xdr, 4);
3022 *p++ = cpu_to_be32(1);
3024 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) {
3025 p = xdr_reserve_space(xdr, 8);
3028 p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes);
3030 if (bmval0 & FATTR4_WORD0_MAXLINK) {
3031 p = xdr_reserve_space(xdr, 4);
3034 *p++ = cpu_to_be32(255);
3036 if (bmval0 & FATTR4_WORD0_MAXNAME) {
3037 p = xdr_reserve_space(xdr, 4);
3040 *p++ = cpu_to_be32(statfs.f_namelen);
3042 if (bmval0 & FATTR4_WORD0_MAXREAD) {
3043 p = xdr_reserve_space(xdr, 8);
3046 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3048 if (bmval0 & FATTR4_WORD0_MAXWRITE) {
3049 p = xdr_reserve_space(xdr, 8);
3052 p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp));
3054 if (bmval1 & FATTR4_WORD1_MODE) {
3055 p = xdr_reserve_space(xdr, 4);
3058 *p++ = cpu_to_be32(stat.mode & S_IALLUGO);
3060 if (bmval1 & FATTR4_WORD1_NO_TRUNC) {
3061 p = xdr_reserve_space(xdr, 4);
3064 *p++ = cpu_to_be32(1);
3066 if (bmval1 & FATTR4_WORD1_NUMLINKS) {
3067 p = xdr_reserve_space(xdr, 4);
3070 *p++ = cpu_to_be32(stat.nlink);
3072 if (bmval1 & FATTR4_WORD1_OWNER) {
3073 status = nfsd4_encode_user(xdr, rqstp, stat.uid);
3077 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) {
3078 status = nfsd4_encode_group(xdr, rqstp, stat.gid);
3082 if (bmval1 & FATTR4_WORD1_RAWDEV) {
3083 p = xdr_reserve_space(xdr, 8);
3086 *p++ = cpu_to_be32((u32) MAJOR(stat.rdev));
3087 *p++ = cpu_to_be32((u32) MINOR(stat.rdev));
3089 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) {
3090 p = xdr_reserve_space(xdr, 8);
3093 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize;
3094 p = xdr_encode_hyper(p, dummy64);
3096 if (bmval1 & FATTR4_WORD1_SPACE_FREE) {
3097 p = xdr_reserve_space(xdr, 8);
3100 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize;
3101 p = xdr_encode_hyper(p, dummy64);
3103 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) {
3104 p = xdr_reserve_space(xdr, 8);
3107 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize;
3108 p = xdr_encode_hyper(p, dummy64);
3110 if (bmval1 & FATTR4_WORD1_SPACE_USED) {
3111 p = xdr_reserve_space(xdr, 8);
3114 dummy64 = (u64)stat.blocks << 9;
3115 p = xdr_encode_hyper(p, dummy64);
3117 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) {
3118 p = xdr_reserve_space(xdr, 12);
3121 p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec);
3122 *p++ = cpu_to_be32(stat.atime.tv_nsec);
3124 if (bmval1 & FATTR4_WORD1_TIME_DELTA) {
3125 p = xdr_reserve_space(xdr, 12);
3128 p = encode_time_delta(p, d_inode(dentry));
3130 if (bmval1 & FATTR4_WORD1_TIME_METADATA) {
3131 p = xdr_reserve_space(xdr, 12);
3134 p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec);
3135 *p++ = cpu_to_be32(stat.ctime.tv_nsec);
3137 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) {
3138 p = xdr_reserve_space(xdr, 12);
3141 p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec);
3142 *p++ = cpu_to_be32(stat.mtime.tv_nsec);
3144 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) {
3145 struct kstat parent_stat;
3148 p = xdr_reserve_space(xdr, 8);
3152 * Get parent's attributes if not ignoring crossmount
3153 * and this is the root of a cross-mounted filesystem.
3155 if (ignore_crossmnt == 0 &&
3156 dentry == exp->ex_path.mnt->mnt_root) {
3157 err = get_parent_attributes(exp, &parent_stat);
3160 ino = parent_stat.ino;
3162 p = xdr_encode_hyper(p, ino);
3164 #ifdef CONFIG_NFSD_PNFS
3165 if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) {
3166 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3171 if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) {
3172 status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types);
3177 if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) {
3178 p = xdr_reserve_space(xdr, 4);
3181 *p++ = cpu_to_be32(stat.blksize);
3183 #endif /* CONFIG_NFSD_PNFS */
3184 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) {
3187 memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp));
3188 supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0;
3189 supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1;
3190 supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2;
3192 status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]);
3197 if (bmval2 & FATTR4_WORD2_CHANGE_ATTR_TYPE) {
3198 p = xdr_reserve_space(xdr, 4);
3201 if (IS_I_VERSION(d_inode(dentry)))
3202 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_MONOTONIC_INCR);
3204 *p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
3207 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3208 if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
3209 status = nfsd4_encode_security_label(xdr, rqstp, context,
3216 if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) {
3217 p = xdr_reserve_space(xdr, 4);
3220 err = xattr_supported_namespace(d_inode(dentry),
3222 *p++ = cpu_to_be32(err == 0);
3225 attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
3226 write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
3230 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
3232 security_release_secctx(context, contextlen);
3233 #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */
3240 xdr_truncate_encode(xdr, starting_len);
3243 status = nfserrno(err);
3246 status = nfserr_resource;
3250 static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr,
3251 struct xdr_buf *buf, __be32 *p, int bytes)
3253 xdr->scratch.iov_len = 0;
3254 memset(buf, 0, sizeof(struct xdr_buf));
3255 buf->head[0].iov_base = p;
3256 buf->head[0].iov_len = 0;
3259 xdr->iov = buf->head;
3261 xdr->end = (void *)p + bytes;
3262 buf->buflen = bytes;
3265 __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words,
3266 struct svc_fh *fhp, struct svc_export *exp,
3267 struct dentry *dentry, u32 *bmval,
3268 struct svc_rqst *rqstp, int ignore_crossmnt)
3270 struct xdr_buf dummy;
3271 struct xdr_stream xdr;
3274 svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2);
3275 ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp,
3281 static inline int attributes_need_mount(u32 *bmval)
3283 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME))
3285 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID)
3291 nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd,
3292 const char *name, int namlen)
3294 struct svc_export *exp = cd->rd_fhp->fh_export;
3295 struct dentry *dentry;
3297 int ignore_crossmnt = 0;
3299 dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen);
3301 return nfserrno(PTR_ERR(dentry));
3305 * In the case of a mountpoint, the client may be asking for
3306 * attributes that are only properties of the underlying filesystem
3307 * as opposed to the cross-mounted file system. In such a case,
3308 * we will not follow the cross mount and will fill the attribtutes
3309 * directly from the mountpoint dentry.
3311 if (nfsd_mountpoint(dentry, exp)) {
3314 if (!(exp->ex_flags & NFSEXP_V4ROOT)
3315 && !attributes_need_mount(cd->rd_bmval)) {
3316 ignore_crossmnt = 1;
3320 * Why the heck aren't we just using nfsd_lookup??
3321 * Different "."/".." handling? Something else?
3322 * At least, add a comment here to explain....
3324 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp);
3326 nfserr = nfserrno(err);
3329 nfserr = check_nfsd_access(exp, cd->rd_rqstp);
3335 nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval,
3336 cd->rd_rqstp, ignore_crossmnt);
3344 nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr)
3348 p = xdr_reserve_space(xdr, 20);
3352 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */
3353 *p++ = htonl(0); /* bmval1 */
3355 *p++ = htonl(4); /* attribute length */
3356 *p++ = nfserr; /* no htonl */
3361 nfsd4_encode_dirent(void *ccdv, const char *name, int namlen,
3362 loff_t offset, u64 ino, unsigned int d_type)
3364 struct readdir_cd *ccd = ccdv;
3365 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common);
3366 struct xdr_stream *xdr = cd->xdr;
3367 int start_offset = xdr->buf->len;
3369 u32 name_and_cookie;
3371 __be32 nfserr = nfserr_toosmall;
3375 /* In nfsv4, "." and ".." never make it onto the wire.. */
3376 if (name && isdotent(name, namlen)) {
3377 cd->common.err = nfs_ok;
3381 if (cd->cookie_offset) {
3382 wire_offset = cpu_to_be64(offset);
3383 write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset,
3387 p = xdr_reserve_space(xdr, 4);
3390 *p++ = xdr_one; /* mark entry present */
3391 cookie_offset = xdr->buf->len;
3392 p = xdr_reserve_space(xdr, 3*4 + namlen);
3395 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */
3396 p = xdr_encode_array(p, name, namlen); /* name length & name */
3398 nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen);
3402 case nfserr_resource:
3403 nfserr = nfserr_toosmall;
3406 xdr_truncate_encode(xdr, start_offset);
3408 case nfserr_jukebox:
3410 * The pseudoroot should only display dentries that lead to
3411 * exports. If we get EJUKEBOX here, then we can't tell whether
3412 * this entry should be included. Just fail the whole READDIR
3413 * with NFS4ERR_DELAY in that case, and hope that the situation
3414 * will resolve itself by the client's next attempt.
3416 if (cd->rd_fhp->fh_export->ex_flags & NFSEXP_V4ROOT)
3421 * If the client requested the RDATTR_ERROR attribute,
3422 * we stuff the error code into this attribute
3423 * and continue. If this attribute was not requested,
3424 * then in accordance with the spec, we fail the
3425 * entire READDIR operation(!)
3427 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR))
3429 p = nfsd4_encode_rdattr_error(xdr, nfserr);
3431 nfserr = nfserr_toosmall;
3435 nfserr = nfserr_toosmall;
3436 entry_bytes = xdr->buf->len - start_offset;
3437 if (entry_bytes > cd->rd_maxcount)
3439 cd->rd_maxcount -= entry_bytes;
3441 * RFC 3530 14.2.24 describes rd_dircount as only a "hint", and
3442 * notes that it could be zero. If it is zero, then the server
3443 * should enforce only the rd_maxcount value.
3445 if (cd->rd_dircount) {
3446 name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8;
3447 if (name_and_cookie > cd->rd_dircount && cd->cookie_offset)
3449 cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie);
3450 if (!cd->rd_dircount)
3451 cd->rd_maxcount = 0;
3454 cd->cookie_offset = cookie_offset;
3456 cd->common.err = nfs_ok;
3459 xdr_truncate_encode(xdr, start_offset);
3460 cd->common.err = nfserr;
3465 nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid)
3469 p = xdr_reserve_space(xdr, sizeof(stateid_t));
3471 return nfserr_resource;
3472 *p++ = cpu_to_be32(sid->si_generation);
3473 p = xdr_encode_opaque_fixed(p, &sid->si_opaque,
3474 sizeof(stateid_opaque_t));
3479 nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access)
3481 struct xdr_stream *xdr = &resp->xdr;
3484 p = xdr_reserve_space(xdr, 8);
3486 return nfserr_resource;
3487 *p++ = cpu_to_be32(access->ac_supported);
3488 *p++ = cpu_to_be32(access->ac_resp_access);
3492 static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts)
3494 struct xdr_stream *xdr = &resp->xdr;
3497 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8);
3499 return nfserr_resource;
3500 p = xdr_encode_opaque_fixed(p, bcts->sessionid.data,
3501 NFS4_MAX_SESSIONID_LEN);
3502 *p++ = cpu_to_be32(bcts->dir);
3503 /* Upshifting from TCP to RDMA is not supported */
3504 *p++ = cpu_to_be32(0);
3509 nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close)
3511 struct xdr_stream *xdr = &resp->xdr;
3513 return nfsd4_encode_stateid(xdr, &close->cl_stateid);
3518 nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit)
3520 struct xdr_stream *xdr = &resp->xdr;
3523 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3525 return nfserr_resource;
3526 p = xdr_encode_opaque_fixed(p, commit->co_verf.data,
3527 NFS4_VERIFIER_SIZE);
3532 nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create)
3534 struct xdr_stream *xdr = &resp->xdr;
3537 p = xdr_reserve_space(xdr, 20);
3539 return nfserr_resource;
3540 encode_cinfo(p, &create->cr_cinfo);
3541 return nfsd4_encode_bitmap(xdr, create->cr_bmval[0],
3542 create->cr_bmval[1], create->cr_bmval[2]);
3546 nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr)
3548 struct svc_fh *fhp = getattr->ga_fhp;
3549 struct xdr_stream *xdr = &resp->xdr;
3551 return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry,
3552 getattr->ga_bmval, resp->rqstp, 0);
3556 nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp)
3558 struct xdr_stream *xdr = &resp->xdr;
3559 struct svc_fh *fhp = *fhpp;
3563 len = fhp->fh_handle.fh_size;
3564 p = xdr_reserve_space(xdr, len + 4);
3566 return nfserr_resource;
3567 p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len);
3572 * Including all fields other than the name, a LOCK4denied structure requires
3573 * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes.
3576 nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld)
3578 struct xdr_netobj *conf = &ld->ld_owner;
3582 p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len));
3585 * Don't fail to return the result just because we can't
3586 * return the conflicting open:
3594 return nfserr_resource;
3596 p = xdr_encode_hyper(p, ld->ld_start);
3597 p = xdr_encode_hyper(p, ld->ld_length);
3598 *p++ = cpu_to_be32(ld->ld_type);
3600 p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8);
3601 p = xdr_encode_opaque(p, conf->data, conf->len);
3603 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */
3604 p = xdr_encode_hyper(p, (u64)0); /* clientid */
3605 *p++ = cpu_to_be32(0); /* length of owner name */
3607 return nfserr_denied;
3611 nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock)
3613 struct xdr_stream *xdr = &resp->xdr;
3616 nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid);
3617 else if (nfserr == nfserr_denied)
3618 nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied);
3624 nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt)
3626 struct xdr_stream *xdr = &resp->xdr;
3628 if (nfserr == nfserr_denied)
3629 nfsd4_encode_lock_denied(xdr, &lockt->lt_denied);
3634 nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku)
3636 struct xdr_stream *xdr = &resp->xdr;
3638 return nfsd4_encode_stateid(xdr, &locku->lu_stateid);
3643 nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link)
3645 struct xdr_stream *xdr = &resp->xdr;
3648 p = xdr_reserve_space(xdr, 20);
3650 return nfserr_resource;
3651 p = encode_cinfo(p, &link->li_cinfo);
3657 nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open)
3659 struct xdr_stream *xdr = &resp->xdr;
3662 nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid);
3665 p = xdr_reserve_space(xdr, 24);
3667 return nfserr_resource;
3668 p = encode_cinfo(p, &open->op_cinfo);
3669 *p++ = cpu_to_be32(open->op_rflags);
3671 nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1],
3676 p = xdr_reserve_space(xdr, 4);
3678 return nfserr_resource;
3680 *p++ = cpu_to_be32(open->op_delegate_type);
3681 switch (open->op_delegate_type) {
3682 case NFS4_OPEN_DELEGATE_NONE:
3684 case NFS4_OPEN_DELEGATE_READ:
3685 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3688 p = xdr_reserve_space(xdr, 20);
3690 return nfserr_resource;
3691 *p++ = cpu_to_be32(open->op_recall);
3694 * TODO: ACE's in delegations
3696 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3697 *p++ = cpu_to_be32(0);
3698 *p++ = cpu_to_be32(0);
3699 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3701 case NFS4_OPEN_DELEGATE_WRITE:
3702 nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid);
3705 p = xdr_reserve_space(xdr, 32);
3707 return nfserr_resource;
3708 *p++ = cpu_to_be32(open->op_recall);
3711 * TODO: space_limit's in delegations
3713 *p++ = cpu_to_be32(NFS4_LIMIT_SIZE);
3714 *p++ = cpu_to_be32(~(u32)0);
3715 *p++ = cpu_to_be32(~(u32)0);
3718 * TODO: ACE's in delegations
3720 *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE);
3721 *p++ = cpu_to_be32(0);
3722 *p++ = cpu_to_be32(0);
3723 *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */
3725 case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */
3726 switch (open->op_why_no_deleg) {
3727 case WND4_CONTENTION:
3729 p = xdr_reserve_space(xdr, 8);
3731 return nfserr_resource;
3732 *p++ = cpu_to_be32(open->op_why_no_deleg);
3733 /* deleg signaling not supported yet: */
3734 *p++ = cpu_to_be32(0);
3737 p = xdr_reserve_space(xdr, 4);
3739 return nfserr_resource;
3740 *p++ = cpu_to_be32(open->op_why_no_deleg);
3746 /* XXX save filehandle here */
3751 nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc)
3753 struct xdr_stream *xdr = &resp->xdr;
3755 return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid);
3759 nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od)
3761 struct xdr_stream *xdr = &resp->xdr;
3763 return nfsd4_encode_stateid(xdr, &od->od_stateid);
3766 static __be32 nfsd4_encode_splice_read(
3767 struct nfsd4_compoundres *resp,
3768 struct nfsd4_read *read,
3769 struct file *file, unsigned long maxcount)
3771 struct xdr_stream *xdr = &resp->xdr;
3772 struct xdr_buf *buf = xdr->buf;
3776 __be32 *p = xdr->p - 2;
3778 /* Make sure there will be room for padding if needed */
3779 if (xdr->end - xdr->p < 1)
3780 return nfserr_resource;
3782 nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp,
3783 file, read->rd_offset, &maxcount, &eof);
3784 read->rd_length = maxcount;
3787 * nfsd_splice_actor may have already messed with the
3788 * page length; reset it so as not to confuse
3789 * xdr_truncate_encode:
3795 *(p++) = htonl(eof);
3796 *(p++) = htonl(maxcount);
3798 buf->page_len = maxcount;
3799 buf->len += maxcount;
3800 xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1)
3803 /* Use rest of head for padding and remaining ops: */
3804 buf->tail[0].iov_base = xdr->p;
3805 buf->tail[0].iov_len = 0;
3806 xdr->iov = buf->tail;
3808 int pad = 4 - (maxcount&3);
3812 buf->tail[0].iov_base += maxcount&3;
3813 buf->tail[0].iov_len = pad;
3817 space_left = min_t(int, (void *)xdr->end - (void *)xdr->p,
3818 buf->buflen - buf->len);
3819 buf->buflen = buf->len + space_left;
3820 xdr->end = (__be32 *)((void *)xdr->end + space_left);
3825 static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp,
3826 struct nfsd4_read *read,
3827 struct file *file, unsigned long maxcount)
3829 struct xdr_stream *xdr = &resp->xdr;
3831 int starting_len = xdr->buf->len - 8;
3836 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount);
3837 if (read->rd_vlen < 0)
3838 return nfserr_resource;
3840 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
3841 resp->rqstp->rq_vec, read->rd_vlen, &maxcount,
3843 read->rd_length = maxcount;
3846 if (svc_encode_read_payload(resp->rqstp, starting_len + 8, maxcount))
3848 xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount));
3851 write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4);
3852 tmp = htonl(maxcount);
3853 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
3856 pad = (maxcount&3) ? 4 - (maxcount&3) : 0;
3857 write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount,
3864 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr,
3865 struct nfsd4_read *read)
3867 unsigned long maxcount;
3868 struct xdr_stream *xdr = &resp->xdr;
3870 int starting_len = xdr->buf->len;
3875 file = read->rd_nf->nf_file;
3877 p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */
3879 WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags));
3880 return nfserr_resource;
3882 if (resp->xdr.buf->page_len &&
3883 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) {
3885 return nfserr_serverfault;
3887 xdr_commit_encode(xdr);
3889 maxcount = svc_max_payload(resp->rqstp);
3890 maxcount = min_t(unsigned long, maxcount,
3891 (xdr->buf->buflen - xdr->buf->len));
3892 maxcount = min_t(unsigned long, maxcount, read->rd_length);
3894 if (file->f_op->splice_read &&
3895 test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags))
3896 nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount);
3898 nfserr = nfsd4_encode_readv(resp, read, file, maxcount);
3901 xdr_truncate_encode(xdr, starting_len);
3907 nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink)
3912 struct xdr_stream *xdr = &resp->xdr;
3913 int length_offset = xdr->buf->len;
3916 p = xdr_reserve_space(xdr, 4);
3918 return nfserr_resource;
3919 maxcount = PAGE_SIZE;
3921 p = xdr_reserve_space(xdr, maxcount);
3923 return nfserr_resource;
3925 * XXX: By default, vfs_readlink() will truncate symlinks if they
3926 * would overflow the buffer. Is this kosher in NFSv4? If not, one
3927 * easy fix is: if vfs_readlink() precisely fills the buffer, assume
3928 * that truncation occurred, and return NFS4ERR_RESOURCE.
3930 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp,
3931 (char *)p, &maxcount);
3932 if (nfserr == nfserr_isdir)
3933 nfserr = nfserr_inval;
3935 xdr_truncate_encode(xdr, length_offset);
3939 wire_count = htonl(maxcount);
3940 write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4);
3941 xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4));
3943 write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount,
3944 &zero, 4 - (maxcount&3));
3949 nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir)
3955 struct xdr_stream *xdr = &resp->xdr;
3956 int starting_len = xdr->buf->len;
3959 p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE);
3961 return nfserr_resource;
3963 /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */
3964 *p++ = cpu_to_be32(0);
3965 *p++ = cpu_to_be32(0);
3966 resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p)
3967 - (char *)resp->xdr.buf->head[0].iov_base;
3970 * Number of bytes left for directory entries allowing for the
3971 * final 8 bytes of the readdir and a following failed op:
3973 bytes_left = xdr->buf->buflen - xdr->buf->len
3974 - COMPOUND_ERR_SLACK_SPACE - 8;
3975 if (bytes_left < 0) {
3976 nfserr = nfserr_resource;
3979 maxcount = svc_max_payload(resp->rqstp);
3980 maxcount = min_t(u32, readdir->rd_maxcount, maxcount);
3982 * Note the rfc defines rd_maxcount as the size of the
3983 * READDIR4resok structure, which includes the verifier above
3984 * and the 8 bytes encoded at the end of this function:
3986 if (maxcount < 16) {
3987 nfserr = nfserr_toosmall;
3990 maxcount = min_t(int, maxcount-16, bytes_left);
3992 /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */
3993 if (!readdir->rd_dircount)
3994 readdir->rd_dircount = svc_max_payload(resp->rqstp);
3997 readdir->rd_maxcount = maxcount;
3998 readdir->common.err = 0;
3999 readdir->cookie_offset = 0;
4001 offset = readdir->rd_cookie;
4002 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp,
4004 &readdir->common, nfsd4_encode_dirent);
4005 if (nfserr == nfs_ok &&
4006 readdir->common.err == nfserr_toosmall &&
4007 xdr->buf->len == starting_len + 8) {
4008 /* nothing encoded; which limit did we hit?: */
4009 if (maxcount - 16 < bytes_left)
4010 /* It was the fault of rd_maxcount: */
4011 nfserr = nfserr_toosmall;
4013 /* We ran out of buffer space: */
4014 nfserr = nfserr_resource;
4019 if (readdir->cookie_offset) {
4020 wire_offset = cpu_to_be64(offset);
4021 write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset,
4025 p = xdr_reserve_space(xdr, 8);
4030 *p++ = 0; /* no more entries */
4031 *p++ = htonl(readdir->common.err == nfserr_eof);
4035 xdr_truncate_encode(xdr, starting_len);
4040 nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove)
4042 struct xdr_stream *xdr = &resp->xdr;
4045 p = xdr_reserve_space(xdr, 20);
4047 return nfserr_resource;
4048 p = encode_cinfo(p, &remove->rm_cinfo);
4053 nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename)
4055 struct xdr_stream *xdr = &resp->xdr;
4058 p = xdr_reserve_space(xdr, 40);
4060 return nfserr_resource;
4061 p = encode_cinfo(p, &rename->rn_sinfo);
4062 p = encode_cinfo(p, &rename->rn_tinfo);
4067 nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp)
4069 u32 i, nflavs, supported;
4070 struct exp_flavor_info *flavs;
4071 struct exp_flavor_info def_flavs[2];
4072 __be32 *p, *flavorsp;
4073 static bool report = true;
4075 if (exp->ex_nflavors) {
4076 flavs = exp->ex_flavors;
4077 nflavs = exp->ex_nflavors;
4078 } else { /* Handling of some defaults in absence of real secinfo: */
4080 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) {
4082 flavs[0].pseudoflavor = RPC_AUTH_UNIX;
4083 flavs[1].pseudoflavor = RPC_AUTH_NULL;
4084 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) {
4086 flavs[0].pseudoflavor
4087 = svcauth_gss_flavor(exp->ex_client);
4090 flavs[0].pseudoflavor
4091 = exp->ex_client->flavour->flavour;
4096 p = xdr_reserve_space(xdr, 4);
4098 return nfserr_resource;
4099 flavorsp = p++; /* to be backfilled later */
4101 for (i = 0; i < nflavs; i++) {
4102 rpc_authflavor_t pf = flavs[i].pseudoflavor;
4103 struct rpcsec_gss_info info;
4105 if (rpcauth_get_gssinfo(pf, &info) == 0) {
4107 p = xdr_reserve_space(xdr, 4 + 4 +
4108 XDR_LEN(info.oid.len) + 4 + 4);
4110 return nfserr_resource;
4111 *p++ = cpu_to_be32(RPC_AUTH_GSS);
4112 p = xdr_encode_opaque(p, info.oid.data, info.oid.len);
4113 *p++ = cpu_to_be32(info.qop);
4114 *p++ = cpu_to_be32(info.service);
4115 } else if (pf < RPC_AUTH_MAXFLAVOR) {
4117 p = xdr_reserve_space(xdr, 4);
4119 return nfserr_resource;
4120 *p++ = cpu_to_be32(pf);
4123 pr_warn("NFS: SECINFO: security flavor %u "
4124 "is not supported\n", pf);
4128 if (nflavs != supported)
4130 *flavorsp = htonl(supported);
4135 nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4136 struct nfsd4_secinfo *secinfo)
4138 struct xdr_stream *xdr = &resp->xdr;
4140 return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp);
4144 nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr,
4145 struct nfsd4_secinfo_no_name *secinfo)
4147 struct xdr_stream *xdr = &resp->xdr;
4149 return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp);
4153 * The SETATTR encode routine is special -- it always encodes a bitmap,
4154 * regardless of the error status.
4157 nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr)
4159 struct xdr_stream *xdr = &resp->xdr;
4162 p = xdr_reserve_space(xdr, 16);
4164 return nfserr_resource;
4166 *p++ = cpu_to_be32(3);
4167 *p++ = cpu_to_be32(0);
4168 *p++ = cpu_to_be32(0);
4169 *p++ = cpu_to_be32(0);
4172 *p++ = cpu_to_be32(3);
4173 *p++ = cpu_to_be32(setattr->sa_bmval[0]);
4174 *p++ = cpu_to_be32(setattr->sa_bmval[1]);
4175 *p++ = cpu_to_be32(setattr->sa_bmval[2]);
4181 nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd)
4183 struct xdr_stream *xdr = &resp->xdr;
4187 p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE);
4189 return nfserr_resource;
4190 p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8);
4191 p = xdr_encode_opaque_fixed(p, &scd->se_confirm,
4192 NFS4_VERIFIER_SIZE);
4194 else if (nfserr == nfserr_clid_inuse) {
4195 p = xdr_reserve_space(xdr, 8);
4197 return nfserr_resource;
4198 *p++ = cpu_to_be32(0);
4199 *p++ = cpu_to_be32(0);
4205 nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write)
4207 struct xdr_stream *xdr = &resp->xdr;
4210 p = xdr_reserve_space(xdr, 16);
4212 return nfserr_resource;
4213 *p++ = cpu_to_be32(write->wr_bytes_written);
4214 *p++ = cpu_to_be32(write->wr_how_written);
4215 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4216 NFS4_VERIFIER_SIZE);
4221 nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr,
4222 struct nfsd4_exchange_id *exid)
4224 struct xdr_stream *xdr = &resp->xdr;
4229 int server_scope_sz;
4230 uint64_t minor_id = 0;
4231 struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id);
4233 major_id = nn->nfsd_name;
4234 major_id_sz = strlen(nn->nfsd_name);
4235 server_scope = nn->nfsd_name;
4236 server_scope_sz = strlen(nn->nfsd_name);
4238 p = xdr_reserve_space(xdr,
4239 8 /* eir_clientid */ +
4240 4 /* eir_sequenceid */ +
4244 return nfserr_resource;
4246 p = xdr_encode_opaque_fixed(p, &exid->clientid, 8);
4247 *p++ = cpu_to_be32(exid->seqid);
4248 *p++ = cpu_to_be32(exid->flags);
4250 *p++ = cpu_to_be32(exid->spa_how);
4252 switch (exid->spa_how) {
4256 /* spo_must_enforce bitmap: */
4257 nfserr = nfsd4_encode_bitmap(xdr,
4258 exid->spo_must_enforce[0],
4259 exid->spo_must_enforce[1],
4260 exid->spo_must_enforce[2]);
4263 /* spo_must_allow bitmap: */
4264 nfserr = nfsd4_encode_bitmap(xdr,
4265 exid->spo_must_allow[0],
4266 exid->spo_must_allow[1],
4267 exid->spo_must_allow[2]);
4275 p = xdr_reserve_space(xdr,
4276 8 /* so_minor_id */ +
4277 4 /* so_major_id.len */ +
4278 (XDR_QUADLEN(major_id_sz) * 4) +
4279 4 /* eir_server_scope.len */ +
4280 (XDR_QUADLEN(server_scope_sz) * 4) +
4281 4 /* eir_server_impl_id.count (0) */);
4283 return nfserr_resource;
4285 /* The server_owner struct */
4286 p = xdr_encode_hyper(p, minor_id); /* Minor id */
4288 p = xdr_encode_opaque(p, major_id, major_id_sz);
4291 p = xdr_encode_opaque(p, server_scope, server_scope_sz);
4293 /* Implementation id */
4294 *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */
4299 nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr,
4300 struct nfsd4_create_session *sess)
4302 struct xdr_stream *xdr = &resp->xdr;
4305 p = xdr_reserve_space(xdr, 24);
4307 return nfserr_resource;
4308 p = xdr_encode_opaque_fixed(p, sess->sessionid.data,
4309 NFS4_MAX_SESSIONID_LEN);
4310 *p++ = cpu_to_be32(sess->seqid);
4311 *p++ = cpu_to_be32(sess->flags);
4313 p = xdr_reserve_space(xdr, 28);
4315 return nfserr_resource;
4316 *p++ = cpu_to_be32(0); /* headerpadsz */
4317 *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz);
4318 *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz);
4319 *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached);
4320 *p++ = cpu_to_be32(sess->fore_channel.maxops);
4321 *p++ = cpu_to_be32(sess->fore_channel.maxreqs);
4322 *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs);
4324 if (sess->fore_channel.nr_rdma_attrs) {
4325 p = xdr_reserve_space(xdr, 4);
4327 return nfserr_resource;
4328 *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs);
4331 p = xdr_reserve_space(xdr, 28);
4333 return nfserr_resource;
4334 *p++ = cpu_to_be32(0); /* headerpadsz */
4335 *p++ = cpu_to_be32(sess->back_channel.maxreq_sz);
4336 *p++ = cpu_to_be32(sess->back_channel.maxresp_sz);
4337 *p++ = cpu_to_be32(sess->back_channel.maxresp_cached);
4338 *p++ = cpu_to_be32(sess->back_channel.maxops);
4339 *p++ = cpu_to_be32(sess->back_channel.maxreqs);
4340 *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs);
4342 if (sess->back_channel.nr_rdma_attrs) {
4343 p = xdr_reserve_space(xdr, 4);
4345 return nfserr_resource;
4346 *p++ = cpu_to_be32(sess->back_channel.rdma_attrs);
4352 nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr,
4353 struct nfsd4_sequence *seq)
4355 struct xdr_stream *xdr = &resp->xdr;
4358 p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20);
4360 return nfserr_resource;
4361 p = xdr_encode_opaque_fixed(p, seq->sessionid.data,
4362 NFS4_MAX_SESSIONID_LEN);
4363 *p++ = cpu_to_be32(seq->seqid);
4364 *p++ = cpu_to_be32(seq->slotid);
4365 /* Note slotid's are numbered from zero: */
4366 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */
4367 *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */
4368 *p++ = cpu_to_be32(seq->status_flags);
4370 resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */
4375 nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr,
4376 struct nfsd4_test_stateid *test_stateid)
4378 struct xdr_stream *xdr = &resp->xdr;
4379 struct nfsd4_test_stateid_id *stateid, *next;
4382 p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids));
4384 return nfserr_resource;
4385 *p++ = htonl(test_stateid->ts_num_ids);
4387 list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
4388 *p++ = stateid->ts_id_status;
4394 #ifdef CONFIG_NFSD_PNFS
4396 nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr,
4397 struct nfsd4_getdeviceinfo *gdev)
4399 struct xdr_stream *xdr = &resp->xdr;
4400 const struct nfsd4_layout_ops *ops;
4401 u32 starting_len = xdr->buf->len, needed_len;
4404 p = xdr_reserve_space(xdr, 4);
4406 return nfserr_resource;
4408 *p++ = cpu_to_be32(gdev->gd_layout_type);
4410 ops = nfsd4_layout_ops[gdev->gd_layout_type];
4411 nfserr = ops->encode_getdeviceinfo(xdr, gdev);
4414 * We don't bother to burden the layout drivers with
4415 * enforcing gd_maxcount, just tell the client to
4416 * come back with a bigger buffer if it's not enough.
4418 if (xdr->buf->len + 4 > gdev->gd_maxcount)
4423 if (gdev->gd_notify_types) {
4424 p = xdr_reserve_space(xdr, 4 + 4);
4426 return nfserr_resource;
4427 *p++ = cpu_to_be32(1); /* bitmap length */
4428 *p++ = cpu_to_be32(gdev->gd_notify_types);
4430 p = xdr_reserve_space(xdr, 4);
4432 return nfserr_resource;
4438 dprintk("%s: maxcount too small\n", __func__);
4439 needed_len = xdr->buf->len + 4 /* notifications */;
4440 xdr_truncate_encode(xdr, starting_len);
4441 p = xdr_reserve_space(xdr, 4);
4443 return nfserr_resource;
4444 *p++ = cpu_to_be32(needed_len);
4445 return nfserr_toosmall;
4449 nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr,
4450 struct nfsd4_layoutget *lgp)
4452 struct xdr_stream *xdr = &resp->xdr;
4453 const struct nfsd4_layout_ops *ops;
4456 p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t));
4458 return nfserr_resource;
4460 *p++ = cpu_to_be32(1); /* we always set return-on-close */
4461 *p++ = cpu_to_be32(lgp->lg_sid.si_generation);
4462 p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque,
4463 sizeof(stateid_opaque_t));
4465 *p++ = cpu_to_be32(1); /* we always return a single layout */
4466 p = xdr_encode_hyper(p, lgp->lg_seg.offset);
4467 p = xdr_encode_hyper(p, lgp->lg_seg.length);
4468 *p++ = cpu_to_be32(lgp->lg_seg.iomode);
4469 *p++ = cpu_to_be32(lgp->lg_layout_type);
4471 ops = nfsd4_layout_ops[lgp->lg_layout_type];
4472 return ops->encode_layoutget(xdr, lgp);
4476 nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr,
4477 struct nfsd4_layoutcommit *lcp)
4479 struct xdr_stream *xdr = &resp->xdr;
4482 p = xdr_reserve_space(xdr, 4);
4484 return nfserr_resource;
4485 *p++ = cpu_to_be32(lcp->lc_size_chg);
4486 if (lcp->lc_size_chg) {
4487 p = xdr_reserve_space(xdr, 8);
4489 return nfserr_resource;
4490 p = xdr_encode_hyper(p, lcp->lc_newsize);
4497 nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr,
4498 struct nfsd4_layoutreturn *lrp)
4500 struct xdr_stream *xdr = &resp->xdr;
4503 p = xdr_reserve_space(xdr, 4);
4505 return nfserr_resource;
4506 *p++ = cpu_to_be32(lrp->lrs_present);
4507 if (lrp->lrs_present)
4508 return nfsd4_encode_stateid(xdr, &lrp->lr_sid);
4511 #endif /* CONFIG_NFSD_PNFS */
4514 nfsd42_encode_write_res(struct nfsd4_compoundres *resp,
4515 struct nfsd42_write_res *write, bool sync)
4518 p = xdr_reserve_space(&resp->xdr, 4);
4520 return nfserr_resource;
4523 *p++ = cpu_to_be32(0);
4526 *p++ = cpu_to_be32(1);
4527 nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid);
4531 p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE);
4533 return nfserr_resource;
4535 p = xdr_encode_hyper(p, write->wr_bytes_written);
4536 *p++ = cpu_to_be32(write->wr_stable_how);
4537 p = xdr_encode_opaque_fixed(p, write->wr_verifier.data,
4538 NFS4_VERIFIER_SIZE);
4543 nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns)
4545 struct xdr_stream *xdr = &resp->xdr;
4546 struct nfs42_netaddr *addr;
4549 p = xdr_reserve_space(xdr, 4);
4550 *p++ = cpu_to_be32(ns->nl4_type);
4552 switch (ns->nl4_type) {
4554 addr = &ns->u.nl4_addr;
4556 /* netid_len, netid, uaddr_len, uaddr (port included
4557 * in RPCBIND_MAXUADDRLEN)
4559 p = xdr_reserve_space(xdr,
4561 (XDR_QUADLEN(addr->netid_len) * 4) +
4563 (XDR_QUADLEN(addr->addr_len) * 4));
4565 return nfserr_resource;
4567 *p++ = cpu_to_be32(addr->netid_len);
4568 p = xdr_encode_opaque_fixed(p, addr->netid,
4570 *p++ = cpu_to_be32(addr->addr_len);
4571 p = xdr_encode_opaque_fixed(p, addr->addr,
4575 WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR);
4576 return nfserr_inval;
4583 nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr,
4584 struct nfsd4_copy *copy)
4588 nfserr = nfsd42_encode_write_res(resp, ©->cp_res,
4589 copy->cp_synchronous);
4593 p = xdr_reserve_space(&resp->xdr, 4 + 4);
4594 *p++ = xdr_one; /* cr_consecutive */
4595 *p++ = cpu_to_be32(copy->cp_synchronous);
4600 nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr,
4601 struct nfsd4_offload_status *os)
4603 struct xdr_stream *xdr = &resp->xdr;
4606 p = xdr_reserve_space(xdr, 8 + 4);
4608 return nfserr_resource;
4609 p = xdr_encode_hyper(p, os->count);
4610 *p++ = cpu_to_be32(0);
4615 nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp,
4616 struct nfsd4_read *read,
4617 unsigned long *maxcount, u32 *eof,
4620 struct xdr_stream *xdr = &resp->xdr;
4621 struct file *file = read->rd_nf->nf_file;
4622 int starting_len = xdr->buf->len;
4628 hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4629 if (hole_pos > read->rd_offset)
4630 *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset);
4631 *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len));
4633 /* Content type, offset, byte count */
4634 p = xdr_reserve_space(xdr, 4 + 8 + 4);
4636 return nfserr_resource;
4638 read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount);
4639 if (read->rd_vlen < 0)
4640 return nfserr_resource;
4642 nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset,
4643 resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof);
4646 xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount));
4648 tmp = htonl(NFS4_CONTENT_DATA);
4649 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4650 tmp64 = cpu_to_be64(read->rd_offset);
4651 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8);
4652 tmp = htonl(*maxcount);
4653 write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4);
4656 write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp,
4657 xdr_pad_size(*maxcount));
4662 nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp,
4663 struct nfsd4_read *read,
4664 unsigned long *maxcount, u32 *eof)
4666 struct file *file = read->rd_nf->nf_file;
4667 loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA);
4668 loff_t f_size = i_size_read(file_inode(file));
4669 unsigned long count;
4672 if (data_pos == -ENXIO)
4674 else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE))
4675 return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size);
4676 count = data_pos - read->rd_offset;
4678 /* Content type, offset, byte count */
4679 p = xdr_reserve_space(&resp->xdr, 4 + 8 + 8);
4681 return nfserr_resource;
4683 *p++ = htonl(NFS4_CONTENT_HOLE);
4684 p = xdr_encode_hyper(p, read->rd_offset);
4685 p = xdr_encode_hyper(p, count);
4687 *eof = (read->rd_offset + count) >= f_size;
4688 *maxcount = min_t(unsigned long, count, *maxcount);
4693 nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr,
4694 struct nfsd4_read *read)
4696 unsigned long maxcount, count;
4697 struct xdr_stream *xdr = &resp->xdr;
4699 int starting_len = xdr->buf->len;
4700 int last_segment = xdr->buf->len;
4709 file = read->rd_nf->nf_file;
4711 /* eof flag, segment count */
4712 p = xdr_reserve_space(xdr, 4 + 4);
4714 return nfserr_resource;
4715 xdr_commit_encode(xdr);
4717 maxcount = svc_max_payload(resp->rqstp);
4718 maxcount = min_t(unsigned long, maxcount,
4719 (xdr->buf->buflen - xdr->buf->len));
4720 maxcount = min_t(unsigned long, maxcount, read->rd_length);
4723 eof = read->rd_offset >= i_size_read(file_inode(file));
4727 pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE);
4728 is_data = pos > read->rd_offset;
4730 while (count > 0 && !eof) {
4733 nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof,
4734 segments == 0 ? &pos : NULL);
4736 nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof);
4740 read->rd_offset += maxcount;
4742 last_segment = xdr->buf->len;
4747 if (nfserr && segments == 0)
4748 xdr_truncate_encode(xdr, starting_len);
4751 xdr_truncate_encode(xdr, last_segment);
4756 write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4);
4757 tmp = htonl(segments);
4758 write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4);
4765 nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr,
4766 struct nfsd4_copy_notify *cn)
4768 struct xdr_stream *xdr = &resp->xdr;
4775 p = xdr_reserve_space(xdr, 12);
4777 return nfserr_resource;
4779 /* cnr_lease_time */
4780 p = xdr_encode_hyper(p, cn->cpn_sec);
4781 *p++ = cpu_to_be32(cn->cpn_nsec);
4784 nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid);
4788 /* cnr_src.nl_nsvr */
4789 p = xdr_reserve_space(xdr, 4);
4791 return nfserr_resource;
4793 *p++ = cpu_to_be32(1);
4795 return nfsd42_encode_nl4_server(resp, &cn->cpn_src);
4799 nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr,
4800 struct nfsd4_seek *seek)
4804 p = xdr_reserve_space(&resp->xdr, 4 + 8);
4805 *p++ = cpu_to_be32(seek->seek_eof);
4806 p = xdr_encode_hyper(p, seek->seek_pos);
4812 nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p)
4818 * Encode kmalloc-ed buffer in to XDR stream.
4821 nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen)
4826 cplen = min_t(unsigned long, buflen,
4827 ((void *)xdr->end - (void *)xdr->p));
4828 p = xdr_reserve_space(xdr, cplen);
4830 return nfserr_resource;
4832 memcpy(p, buf, cplen);
4837 cplen = min_t(u32, buflen, PAGE_SIZE);
4838 p = xdr_reserve_space(xdr, cplen);
4840 return nfserr_resource;
4842 memcpy(p, buf, cplen);
4844 if (cplen < PAGE_SIZE) {
4846 * We're done, with a length that wasn't page
4847 * aligned, so possibly not word aligned. Pad
4848 * any trailing bytes with 0.
4850 xdr_encode_opaque_fixed(p, NULL, cplen);
4854 buflen -= PAGE_SIZE;
4862 nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4863 struct nfsd4_getxattr *getxattr)
4865 struct xdr_stream *xdr = &resp->xdr;
4868 p = xdr_reserve_space(xdr, 4);
4870 return nfserr_resource;
4872 *p = cpu_to_be32(getxattr->getxa_len);
4874 if (getxattr->getxa_len == 0)
4877 err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf,
4878 getxattr->getxa_len);
4880 kvfree(getxattr->getxa_buf);
4886 nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr,
4887 struct nfsd4_setxattr *setxattr)
4889 struct xdr_stream *xdr = &resp->xdr;
4892 p = xdr_reserve_space(xdr, 20);
4894 return nfserr_resource;
4896 encode_cinfo(p, &setxattr->setxa_cinfo);
4902 * See if there are cookie values that can be rejected outright.
4905 nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs,
4908 u64 cookie = listxattrs->lsxa_cookie;
4911 * If the cookie is larger than the maximum number we can fit
4912 * in either the buffer we just got back from vfs_listxattr, or,
4913 * XDR-encoded, in the return buffer, it's invalid.
4915 if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2))
4916 return nfserr_badcookie;
4918 if (cookie > (listxattrs->lsxa_maxcount /
4919 (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4)))
4920 return nfserr_badcookie;
4922 *offsetp = (u32)cookie;
4927 nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr,
4928 struct nfsd4_listxattrs *listxattrs)
4930 struct xdr_stream *xdr = &resp->xdr;
4931 u32 cookie_offset, count_offset, eof;
4932 u32 left, xdrleft, slen, count;
4942 status = nfsd4_listxattr_validate_cookie(listxattrs, &offset);
4947 * Reserve space for the cookie and the name array count. Record
4948 * the offsets to save them later.
4950 cookie_offset = xdr->buf->len;
4951 count_offset = cookie_offset + 8;
4952 p = xdr_reserve_space(xdr, 12);
4954 status = nfserr_resource;
4959 left = listxattrs->lsxa_len;
4960 sp = listxattrs->lsxa_buf;
4963 xdrleft = listxattrs->lsxa_maxcount;
4965 while (left > 0 && xdrleft > 0) {
4969 * Check if this is a "user." attribute, skip it if not.
4971 if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
4974 slen -= XATTR_USER_PREFIX_LEN;
4975 xdrlen = 4 + ((slen + 3) & ~3);
4976 if (xdrlen > xdrleft) {
4979 * Can't even fit the first attribute name.
4981 status = nfserr_toosmall;
4988 left -= XATTR_USER_PREFIX_LEN;
4989 sp += XATTR_USER_PREFIX_LEN;
4990 if (nuser++ < offset)
4994 p = xdr_reserve_space(xdr, xdrlen);
4996 status = nfserr_resource;
5000 xdr_encode_opaque(p, sp, slen);
5010 * If there were user attributes to copy, but we didn't copy
5011 * any, the offset was too large (e.g. the cookie was invalid).
5013 if (nuser > 0 && count == 0) {
5014 status = nfserr_badcookie;
5019 p = xdr_reserve_space(xdr, 4);
5021 status = nfserr_resource;
5024 *p = cpu_to_be32(eof);
5026 cookie = offset + count;
5028 write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8);
5029 tmp = cpu_to_be32(count);
5030 write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4);
5032 if (listxattrs->lsxa_len)
5033 kvfree(listxattrs->lsxa_buf);
5038 nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr,
5039 struct nfsd4_removexattr *removexattr)
5041 struct xdr_stream *xdr = &resp->xdr;
5044 p = xdr_reserve_space(xdr, 20);
5046 return nfserr_resource;
5048 p = encode_cinfo(p, &removexattr->rmxa_cinfo);
5052 typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *);
5055 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1
5056 * since we don't need to filter out obsolete ops as this is
5057 * done in the decoding phase.
5059 static const nfsd4_enc nfsd4_enc_ops[] = {
5060 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access,
5061 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close,
5062 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit,
5063 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create,
5064 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop,
5065 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5066 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr,
5067 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh,
5068 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link,
5069 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock,
5070 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt,
5071 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku,
5072 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop,
5073 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop,
5074 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5075 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open,
5076 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop,
5077 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm,
5078 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade,
5079 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop,
5080 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop,
5081 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop,
5082 [OP_READ] = (nfsd4_enc)nfsd4_encode_read,
5083 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir,
5084 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink,
5085 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove,
5086 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename,
5087 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop,
5088 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop,
5089 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop,
5090 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo,
5091 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr,
5092 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid,
5093 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop,
5094 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop,
5095 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write,
5096 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop,
5098 /* NFSv4.1 operations */
5099 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop,
5100 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session,
5101 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id,
5102 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session,
5103 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop,
5104 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop,
5105 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5106 #ifdef CONFIG_NFSD_PNFS
5107 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo,
5108 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5109 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit,
5110 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget,
5111 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn,
5113 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop,
5114 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop,
5115 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop,
5116 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop,
5117 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop,
5119 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name,
5120 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence,
5121 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop,
5122 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid,
5123 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop,
5124 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop,
5125 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop,
5127 /* NFSv4.2 operations */
5128 [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5129 [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy,
5130 [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify,
5131 [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop,
5132 [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop,
5133 [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop,
5134 [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop,
5135 [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop,
5136 [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status,
5137 [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus,
5138 [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek,
5139 [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop,
5140 [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop,
5142 /* RFC 8276 extended atributes operations */
5143 [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr,
5144 [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr,
5145 [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs,
5146 [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr,
5150 * Calculate whether we still have space to encode repsize bytes.
5151 * There are two considerations:
5152 * - For NFS versions >=4.1, the size of the reply must stay within
5154 * - For all NFS versions, we must stay within limited preallocated
5157 * This is called before the operation is processed, so can only provide
5158 * an upper estimate. For some nonidempotent operations (such as
5159 * getattr), it's not necessarily a problem if that estimate is wrong,
5160 * as we can fail it after processing without significant side effects.
5162 __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize)
5164 struct xdr_buf *buf = &resp->rqstp->rq_res;
5165 struct nfsd4_slot *slot = resp->cstate.slot;
5167 if (buf->len + respsize <= buf->buflen)
5169 if (!nfsd4_has_session(&resp->cstate))
5170 return nfserr_resource;
5171 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) {
5173 return nfserr_rep_too_big_to_cache;
5175 return nfserr_rep_too_big;
5179 nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op)
5181 struct xdr_stream *xdr = &resp->xdr;
5182 struct nfs4_stateowner *so = resp->cstate.replay_owner;
5183 struct svc_rqst *rqstp = resp->rqstp;
5184 const struct nfsd4_operation *opdesc = op->opdesc;
5185 int post_err_offset;
5189 p = xdr_reserve_space(xdr, 8);
5194 *p++ = cpu_to_be32(op->opnum);
5195 post_err_offset = xdr->buf->len;
5197 if (op->opnum == OP_ILLEGAL)
5199 if (op->status && opdesc &&
5200 !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE))
5202 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) ||
5203 !nfsd4_enc_ops[op->opnum]);
5204 encoder = nfsd4_enc_ops[op->opnum];
5205 op->status = encoder(resp, op->status, &op->u);
5206 if (opdesc && opdesc->op_release)
5207 opdesc->op_release(&op->u);
5208 xdr_commit_encode(xdr);
5210 /* nfsd4_check_resp_size guarantees enough room for error status */
5212 int space_needed = 0;
5213 if (!nfsd4_last_compound_op(rqstp))
5214 space_needed = COMPOUND_ERR_SLACK_SPACE;
5215 op->status = nfsd4_check_resp_size(resp, space_needed);
5217 if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) {
5218 struct nfsd4_slot *slot = resp->cstate.slot;
5220 if (slot->sl_flags & NFSD4_SLOT_CACHETHIS)
5221 op->status = nfserr_rep_too_big_to_cache;
5223 op->status = nfserr_rep_too_big;
5225 if (op->status == nfserr_resource ||
5226 op->status == nfserr_rep_too_big ||
5227 op->status == nfserr_rep_too_big_to_cache) {
5229 * The operation may have already been encoded or
5230 * partially encoded. No op returns anything additional
5231 * in the case of one of these three errors, so we can
5232 * just truncate back to after the status. But it's a
5233 * bug if we had to do this on a non-idempotent op:
5235 warn_on_nonidempotent_op(op);
5236 xdr_truncate_encode(xdr, post_err_offset);
5239 int len = xdr->buf->len - post_err_offset;
5241 so->so_replay.rp_status = op->status;
5242 so->so_replay.rp_buflen = len;
5243 read_bytes_from_xdr_buf(xdr->buf, post_err_offset,
5244 so->so_replay.rp_buf, len);
5247 /* Note that op->status is already in network byte order: */
5248 write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4);
5252 * Encode the reply stored in the stateowner reply cache
5254 * XDR note: do not encode rp->rp_buflen: the buffer contains the
5255 * previously sent already encoded operation.
5258 nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op)
5261 struct nfs4_replay *rp = op->replay;
5263 p = xdr_reserve_space(xdr, 8 + rp->rp_buflen);
5268 *p++ = cpu_to_be32(op->opnum);
5269 *p++ = rp->rp_status; /* already xdr'ed */
5271 p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen);
5275 nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
5277 return xdr_ressize_check(rqstp, p);
5280 void nfsd4_release_compoundargs(struct svc_rqst *rqstp)
5282 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5284 if (args->ops != args->iops) {
5286 args->ops = args->iops;
5290 while (args->to_free) {
5291 struct svcxdr_tmpbuf *tb = args->to_free;
5292 args->to_free = tb->next;
5298 nfs4svc_decode_voidarg(struct svc_rqst *rqstp, __be32 *p)
5304 nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
5306 struct nfsd4_compoundargs *args = rqstp->rq_argp;
5308 if (rqstp->rq_arg.head[0].iov_len % 4) {
5309 /* client is nuts */
5310 dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)",
5311 __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid));
5315 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len;
5316 args->pagelist = rqstp->rq_arg.pages;
5317 args->pagelen = rqstp->rq_arg.page_len;
5320 args->to_free = NULL;
5321 args->ops = args->iops;
5322 args->rqstp = rqstp;
5324 return !nfsd4_decode_compound(args);
5328 nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
5330 struct nfsd4_compoundres *resp = rqstp->rq_resp;
5331 struct xdr_buf *buf = resp->xdr.buf;
5333 WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
5334 buf->tail[0].iov_len);
5336 *p = resp->cstate.status;
5338 rqstp->rq_next_page = resp->xdr.page_ptr + 1;
5341 *p++ = htonl(resp->taglen);
5342 memcpy(p, resp->tag, resp->taglen);
5343 p += XDR_QUADLEN(resp->taglen);
5344 *p++ = htonl(resp->opcnt);
5346 nfsd4_sequence_done(resp);