2 * linux/fs/nfs/nfs3xdr.c
4 * XDR functions to encode/decode NFSv3 RPC arguments and results.
6 * Copyright (C) 1996, 1997 Olaf Kirch
9 #include <linux/param.h>
10 #include <linux/time.h>
12 #include <linux/errno.h>
13 #include <linux/string.h>
15 #include <linux/pagemap.h>
16 #include <linux/proc_fs.h>
17 #include <linux/kdev_t.h>
18 #include <linux/sunrpc/clnt.h>
19 #include <linux/nfs.h>
20 #include <linux/nfs3.h>
21 #include <linux/nfs_fs.h>
22 #include <linux/nfsacl.h>
25 #define NFSDBG_FACILITY NFSDBG_XDR
27 /* Mapping from NFS error code to "errno" error code. */
28 #define errno_NFSERR_IO EIO
31 * Declare the space requirements for NFS arguments and replies as
32 * number of 32bit-words
34 #define NFS3_fhandle_sz (1+16)
35 #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
36 #define NFS3_post_op_fh_sz (1+NFS3_fh_sz)
37 #define NFS3_sattr_sz (15)
38 #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
39 #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
40 #define NFS3_fattr_sz (21)
41 #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2)
42 #define NFS3_wcc_attr_sz (6)
43 #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
44 #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
45 #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
46 #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
48 #define NFS3_getattrargs_sz (NFS3_fh_sz)
49 #define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
50 #define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz)
51 #define NFS3_accessargs_sz (NFS3_fh_sz+1)
52 #define NFS3_readlinkargs_sz (NFS3_fh_sz)
53 #define NFS3_readargs_sz (NFS3_fh_sz+3)
54 #define NFS3_writeargs_sz (NFS3_fh_sz+5)
55 #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
56 #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
57 #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
58 #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
59 #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
60 #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
61 #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
62 #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3)
63 #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4)
64 #define NFS3_commitargs_sz (NFS3_fh_sz+3)
66 #define NFS3_getattrres_sz (1+NFS3_fattr_sz)
67 #define NFS3_setattrres_sz (1+NFS3_wcc_data_sz)
68 #define NFS3_removeres_sz (NFS3_setattrres_sz)
69 #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
70 #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
71 #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1)
72 #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3)
73 #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
74 #define NFS3_createres_sz (1+NFS3_post_op_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
75 #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz))
76 #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
77 #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2)
78 #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13)
79 #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12)
80 #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6)
81 #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
83 #define ACL3_getaclargs_sz (NFS3_fh_sz+1)
84 #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \
85 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
86 #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \
87 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
88 #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
90 static int nfs3_stat_to_errno(enum nfs_stat);
93 * Map file type to S_IFMT bits
95 static const umode_t nfs_type2fmt[] = {
102 [NF3SOCK] = S_IFSOCK,
107 * While encoding arguments, set up the reply buffer in advance to
108 * receive reply data directly into the page cache.
110 static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages,
111 unsigned int base, unsigned int len,
112 unsigned int bufsize)
114 struct rpc_auth *auth = req->rq_cred->cr_auth;
117 replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize;
118 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len);
122 * Handle decode buffer overflows out-of-line.
124 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
126 dprintk("NFS: %s prematurely hit the end of our receive buffer. "
127 "Remaining buffer length is %tu words.\n",
128 func, xdr->end - xdr->p);
133 * Encode/decode NFSv3 basic data types
135 * Basic NFSv3 data types are defined in section 2.5 of RFC 1813:
136 * "NFS Version 3 Protocol Specification".
138 * Not all basic data types have their own encoding and decoding
139 * functions. For run-time efficiency, some data types are encoded
143 static void encode_uint32(struct xdr_stream *xdr, u32 value)
145 __be32 *p = xdr_reserve_space(xdr, 4);
146 *p = cpu_to_be32(value);
149 static int decode_uint32(struct xdr_stream *xdr, u32 *value)
153 p = xdr_inline_decode(xdr, 4);
154 if (unlikely(p == NULL))
156 *value = be32_to_cpup(p);
159 print_overflow_msg(__func__, xdr);
163 static int decode_uint64(struct xdr_stream *xdr, u64 *value)
167 p = xdr_inline_decode(xdr, 8);
168 if (unlikely(p == NULL))
170 xdr_decode_hyper(p, value);
173 print_overflow_msg(__func__, xdr);
180 * typedef uint64 fileid3;
182 static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid)
184 return xdr_decode_hyper(p, fileid);
187 static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid)
189 return decode_uint64(xdr, fileid);
195 * typedef string filename3<>;
197 static void encode_filename3(struct xdr_stream *xdr,
198 const char *name, u32 length)
202 WARN_ON_ONCE(length > NFS3_MAXNAMLEN);
203 p = xdr_reserve_space(xdr, 4 + length);
204 xdr_encode_opaque(p, name, length);
207 static int decode_inline_filename3(struct xdr_stream *xdr,
208 const char **name, u32 *length)
213 p = xdr_inline_decode(xdr, 4);
214 if (unlikely(p == NULL))
216 count = be32_to_cpup(p);
217 if (count > NFS3_MAXNAMLEN)
218 goto out_nametoolong;
219 p = xdr_inline_decode(xdr, count);
220 if (unlikely(p == NULL))
222 *name = (const char *)p;
227 dprintk("NFS: returned filename too long: %u\n", count);
228 return -ENAMETOOLONG;
230 print_overflow_msg(__func__, xdr);
237 * typedef string nfspath3<>;
239 static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages,
242 encode_uint32(xdr, length);
243 xdr_write_pages(xdr, pages, 0, length);
246 static int decode_nfspath3(struct xdr_stream *xdr)
251 p = xdr_inline_decode(xdr, 4);
252 if (unlikely(p == NULL))
254 count = be32_to_cpup(p);
255 if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN))
256 goto out_nametoolong;
257 recvd = xdr_read_pages(xdr, count);
258 if (unlikely(count > recvd))
260 xdr_terminate_string(xdr->buf, count);
264 dprintk("NFS: returned pathname too long: %u\n", count);
265 return -ENAMETOOLONG;
267 dprintk("NFS: server cheating in pathname result: "
268 "count %u > recvd %u\n", count, recvd);
271 print_overflow_msg(__func__, xdr);
278 * typedef uint64 cookie3
280 static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie)
282 return xdr_encode_hyper(p, cookie);
285 static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie)
287 return decode_uint64(xdr, cookie);
293 * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE];
295 static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier)
297 memcpy(p, verifier, NFS3_COOKIEVERFSIZE);
298 return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE);
301 static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier)
305 p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
306 if (unlikely(p == NULL))
308 memcpy(verifier, p, NFS3_COOKIEVERFSIZE);
311 print_overflow_msg(__func__, xdr);
318 * typedef opaque createverf3[NFS3_CREATEVERFSIZE];
320 static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier)
324 p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE);
325 memcpy(p, verifier, NFS3_CREATEVERFSIZE);
328 static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
332 p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE);
333 if (unlikely(p == NULL))
335 memcpy(verifier->data, p, NFS3_WRITEVERFSIZE);
338 print_overflow_msg(__func__, xdr);
345 * typedef uint64 size3;
347 static __be32 *xdr_decode_size3(__be32 *p, u64 *size)
349 return xdr_decode_hyper(p, size);
360 #define NFS3_OK NFS_OK
362 static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
366 p = xdr_inline_decode(xdr, 4);
367 if (unlikely(p == NULL))
369 *status = be32_to_cpup(p);
372 print_overflow_msg(__func__, xdr);
389 static void encode_ftype3(struct xdr_stream *xdr, const u32 type)
391 encode_uint32(xdr, type);
394 static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode)
398 type = be32_to_cpup(p++);
401 *mode = nfs_type2fmt[type];
413 static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev)
417 p = xdr_reserve_space(xdr, 8);
418 *p++ = cpu_to_be32(MAJOR(rdev));
419 *p = cpu_to_be32(MINOR(rdev));
422 static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev)
424 unsigned int major, minor;
426 major = be32_to_cpup(p++);
427 minor = be32_to_cpup(p++);
428 *rdev = MKDEV(major, minor);
429 if (MAJOR(*rdev) != major || MINOR(*rdev) != minor)
438 * opaque data<NFS3_FHSIZE>;
441 static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh)
445 WARN_ON_ONCE(fh->size > NFS3_FHSIZE);
446 p = xdr_reserve_space(xdr, 4 + fh->size);
447 xdr_encode_opaque(p, fh->data, fh->size);
450 static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
455 p = xdr_inline_decode(xdr, 4);
456 if (unlikely(p == NULL))
458 length = be32_to_cpup(p++);
459 if (unlikely(length > NFS3_FHSIZE))
461 p = xdr_inline_decode(xdr, length);
462 if (unlikely(p == NULL))
465 memcpy(fh->data, p, length);
468 dprintk("NFS: file handle size (%u) too big\n", length);
471 print_overflow_msg(__func__, xdr);
475 static void zero_nfs_fh3(struct nfs_fh *fh)
477 memset(fh, 0, sizeof(*fh));
488 static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep)
490 *p++ = cpu_to_be32(timep->tv_sec);
491 *p++ = cpu_to_be32(timep->tv_nsec);
495 static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep)
497 timep->tv_sec = be32_to_cpup(p++);
498 timep->tv_nsec = be32_to_cpup(p++);
507 * SET_TO_SERVER_TIME = 1,
508 * SET_TO_CLIENT_TIME = 2
511 * union set_mode3 switch (bool set_it) {
518 * union set_uid3 switch (bool set_it) {
525 * union set_gid3 switch (bool set_it) {
532 * union set_size3 switch (bool set_it) {
539 * union set_atime switch (time_how set_it) {
540 * case SET_TO_CLIENT_TIME:
546 * union set_mtime switch (time_how set_it) {
547 * case SET_TO_CLIENT_TIME:
562 static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
568 * In order to make only a single xdr_reserve_space() call,
569 * pre-compute the total number of bytes to be reserved.
570 * Six boolean values, one for each set_foo field, are always
571 * present in the encoded result, so start there.
574 if (attr->ia_valid & ATTR_MODE)
576 if (attr->ia_valid & ATTR_UID)
578 if (attr->ia_valid & ATTR_GID)
580 if (attr->ia_valid & ATTR_SIZE)
582 if (attr->ia_valid & ATTR_ATIME_SET)
584 if (attr->ia_valid & ATTR_MTIME_SET)
586 p = xdr_reserve_space(xdr, nbytes);
588 if (attr->ia_valid & ATTR_MODE) {
590 *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO);
594 if (attr->ia_valid & ATTR_UID) {
596 *p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid));
600 if (attr->ia_valid & ATTR_GID) {
602 *p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid));
606 if (attr->ia_valid & ATTR_SIZE) {
608 p = xdr_encode_hyper(p, (u64)attr->ia_size);
612 if (attr->ia_valid & ATTR_ATIME_SET) {
614 p = xdr_encode_nfstime3(p, &attr->ia_atime);
615 } else if (attr->ia_valid & ATTR_ATIME) {
620 if (attr->ia_valid & ATTR_MTIME_SET) {
622 xdr_encode_nfstime3(p, &attr->ia_mtime);
623 } else if (attr->ia_valid & ATTR_MTIME) {
648 static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
653 p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2);
654 if (unlikely(p == NULL))
657 p = xdr_decode_ftype3(p, &fmode);
659 fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode;
660 fattr->nlink = be32_to_cpup(p++);
661 fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++));
662 if (!uid_valid(fattr->uid))
664 fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++));
665 if (!gid_valid(fattr->gid))
668 p = xdr_decode_size3(p, &fattr->size);
669 p = xdr_decode_size3(p, &fattr->du.nfs3.used);
670 p = xdr_decode_specdata3(p, &fattr->rdev);
672 p = xdr_decode_hyper(p, &fattr->fsid.major);
673 fattr->fsid.minor = 0;
675 p = xdr_decode_fileid3(p, &fattr->fileid);
676 p = xdr_decode_nfstime3(p, &fattr->atime);
677 p = xdr_decode_nfstime3(p, &fattr->mtime);
678 xdr_decode_nfstime3(p, &fattr->ctime);
679 fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime);
681 fattr->valid |= NFS_ATTR_FATTR_V3;
684 dprintk("NFS: returned invalid uid\n");
687 dprintk("NFS: returned invalid gid\n");
690 print_overflow_msg(__func__, xdr);
697 * union post_op_attr switch (bool attributes_follow) {
704 static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
708 p = xdr_inline_decode(xdr, 4);
709 if (unlikely(p == NULL))
712 return decode_fattr3(xdr, fattr);
715 print_overflow_msg(__func__, xdr);
727 static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
731 p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2);
732 if (unlikely(p == NULL))
735 fattr->valid |= NFS_ATTR_FATTR_PRESIZE
736 | NFS_ATTR_FATTR_PRECHANGE
737 | NFS_ATTR_FATTR_PREMTIME
738 | NFS_ATTR_FATTR_PRECTIME;
740 p = xdr_decode_size3(p, &fattr->pre_size);
741 p = xdr_decode_nfstime3(p, &fattr->pre_mtime);
742 xdr_decode_nfstime3(p, &fattr->pre_ctime);
743 fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime);
747 print_overflow_msg(__func__, xdr);
753 * union pre_op_attr switch (bool attributes_follow) {
755 * wcc_attr attributes;
763 * pre_op_attr before;
764 * post_op_attr after;
767 static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
771 p = xdr_inline_decode(xdr, 4);
772 if (unlikely(p == NULL))
775 return decode_wcc_attr(xdr, fattr);
778 print_overflow_msg(__func__, xdr);
782 static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr)
786 error = decode_pre_op_attr(xdr, fattr);
789 error = decode_post_op_attr(xdr, fattr);
797 * union post_op_fh3 switch (bool handle_follows) {
804 static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
806 __be32 *p = xdr_inline_decode(xdr, 4);
807 if (unlikely(p == NULL))
810 return decode_nfs_fh3(xdr, fh);
814 print_overflow_msg(__func__, xdr);
821 * struct diropargs3 {
826 static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh,
827 const char *name, u32 length)
829 encode_nfs_fh3(xdr, fh);
830 encode_filename3(xdr, name, length);
835 * NFSv3 XDR encode functions
837 * NFSv3 argument types are defined in section 3.3 of RFC 1813:
838 * "NFS Version 3 Protocol Specification".
844 * struct GETATTR3args {
848 static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req,
849 struct xdr_stream *xdr,
850 const struct nfs_fh *fh)
852 encode_nfs_fh3(xdr, fh);
858 * union sattrguard3 switch (bool check) {
860 * nfstime3 obj_ctime;
865 * struct SETATTR3args {
867 * sattr3 new_attributes;
871 static void encode_sattrguard3(struct xdr_stream *xdr,
872 const struct nfs3_sattrargs *args)
877 p = xdr_reserve_space(xdr, 4 + 8);
879 xdr_encode_nfstime3(p, &args->guardtime);
881 p = xdr_reserve_space(xdr, 4);
886 static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req,
887 struct xdr_stream *xdr,
888 const struct nfs3_sattrargs *args)
890 encode_nfs_fh3(xdr, args->fh);
891 encode_sattr3(xdr, args->sattr);
892 encode_sattrguard3(xdr, args);
898 * struct LOOKUP3args {
902 static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req,
903 struct xdr_stream *xdr,
904 const struct nfs3_diropargs *args)
906 encode_diropargs3(xdr, args->fh, args->name, args->len);
912 * struct ACCESS3args {
917 static void encode_access3args(struct xdr_stream *xdr,
918 const struct nfs3_accessargs *args)
920 encode_nfs_fh3(xdr, args->fh);
921 encode_uint32(xdr, args->access);
924 static void nfs3_xdr_enc_access3args(struct rpc_rqst *req,
925 struct xdr_stream *xdr,
926 const struct nfs3_accessargs *args)
928 encode_access3args(xdr, args);
932 * 3.3.5 READLINK3args
934 * struct READLINK3args {
938 static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req,
939 struct xdr_stream *xdr,
940 const struct nfs3_readlinkargs *args)
942 encode_nfs_fh3(xdr, args->fh);
943 prepare_reply_buffer(req, args->pages, args->pgbase,
944 args->pglen, NFS3_readlinkres_sz);
956 static void encode_read3args(struct xdr_stream *xdr,
957 const struct nfs_pgio_args *args)
961 encode_nfs_fh3(xdr, args->fh);
963 p = xdr_reserve_space(xdr, 8 + 4);
964 p = xdr_encode_hyper(p, args->offset);
965 *p = cpu_to_be32(args->count);
968 static void nfs3_xdr_enc_read3args(struct rpc_rqst *req,
969 struct xdr_stream *xdr,
970 const struct nfs_pgio_args *args)
972 encode_read3args(xdr, args);
973 prepare_reply_buffer(req, args->pages, args->pgbase,
974 args->count, NFS3_readres_sz);
975 req->rq_rcv_buf.flags |= XDRBUF_READ;
987 * struct WRITE3args {
995 static void encode_write3args(struct xdr_stream *xdr,
996 const struct nfs_pgio_args *args)
1000 encode_nfs_fh3(xdr, args->fh);
1002 p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4);
1003 p = xdr_encode_hyper(p, args->offset);
1004 *p++ = cpu_to_be32(args->count);
1005 *p++ = cpu_to_be32(args->stable);
1006 *p = cpu_to_be32(args->count);
1007 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1010 static void nfs3_xdr_enc_write3args(struct rpc_rqst *req,
1011 struct xdr_stream *xdr,
1012 const struct nfs_pgio_args *args)
1014 encode_write3args(xdr, args);
1015 xdr->buf->flags |= XDRBUF_WRITE;
1021 * enum createmode3 {
1027 * union createhow3 switch (createmode3 mode) {
1030 * sattr3 obj_attributes;
1035 * struct CREATE3args {
1040 static void encode_createhow3(struct xdr_stream *xdr,
1041 const struct nfs3_createargs *args)
1043 encode_uint32(xdr, args->createmode);
1044 switch (args->createmode) {
1045 case NFS3_CREATE_UNCHECKED:
1046 case NFS3_CREATE_GUARDED:
1047 encode_sattr3(xdr, args->sattr);
1049 case NFS3_CREATE_EXCLUSIVE:
1050 encode_createverf3(xdr, args->verifier);
1057 static void nfs3_xdr_enc_create3args(struct rpc_rqst *req,
1058 struct xdr_stream *xdr,
1059 const struct nfs3_createargs *args)
1061 encode_diropargs3(xdr, args->fh, args->name, args->len);
1062 encode_createhow3(xdr, args);
1068 * struct MKDIR3args {
1070 * sattr3 attributes;
1073 static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
1074 struct xdr_stream *xdr,
1075 const struct nfs3_mkdirargs *args)
1077 encode_diropargs3(xdr, args->fh, args->name, args->len);
1078 encode_sattr3(xdr, args->sattr);
1082 * 3.3.10 SYMLINK3args
1084 * struct symlinkdata3 {
1085 * sattr3 symlink_attributes;
1086 * nfspath3 symlink_data;
1089 * struct SYMLINK3args {
1091 * symlinkdata3 symlink;
1094 static void encode_symlinkdata3(struct xdr_stream *xdr,
1095 const struct nfs3_symlinkargs *args)
1097 encode_sattr3(xdr, args->sattr);
1098 encode_nfspath3(xdr, args->pages, args->pathlen);
1101 static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
1102 struct xdr_stream *xdr,
1103 const struct nfs3_symlinkargs *args)
1105 encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
1106 encode_symlinkdata3(xdr, args);
1107 xdr->buf->flags |= XDRBUF_WRITE;
1113 * struct devicedata3 {
1114 * sattr3 dev_attributes;
1118 * union mknoddata3 switch (ftype3 type) {
1121 * devicedata3 device;
1124 * sattr3 pipe_attributes;
1129 * struct MKNOD3args {
1134 static void encode_devicedata3(struct xdr_stream *xdr,
1135 const struct nfs3_mknodargs *args)
1137 encode_sattr3(xdr, args->sattr);
1138 encode_specdata3(xdr, args->rdev);
1141 static void encode_mknoddata3(struct xdr_stream *xdr,
1142 const struct nfs3_mknodargs *args)
1144 encode_ftype3(xdr, args->type);
1145 switch (args->type) {
1148 encode_devicedata3(xdr, args);
1152 encode_sattr3(xdr, args->sattr);
1162 static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req,
1163 struct xdr_stream *xdr,
1164 const struct nfs3_mknodargs *args)
1166 encode_diropargs3(xdr, args->fh, args->name, args->len);
1167 encode_mknoddata3(xdr, args);
1171 * 3.3.12 REMOVE3args
1173 * struct REMOVE3args {
1174 * diropargs3 object;
1177 static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req,
1178 struct xdr_stream *xdr,
1179 const struct nfs_removeargs *args)
1181 encode_diropargs3(xdr, args->fh, args->name.name, args->name.len);
1185 * 3.3.14 RENAME3args
1187 * struct RENAME3args {
1192 static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req,
1193 struct xdr_stream *xdr,
1194 const struct nfs_renameargs *args)
1196 const struct qstr *old = args->old_name;
1197 const struct qstr *new = args->new_name;
1199 encode_diropargs3(xdr, args->old_dir, old->name, old->len);
1200 encode_diropargs3(xdr, args->new_dir, new->name, new->len);
1206 * struct LINK3args {
1211 static void nfs3_xdr_enc_link3args(struct rpc_rqst *req,
1212 struct xdr_stream *xdr,
1213 const struct nfs3_linkargs *args)
1215 encode_nfs_fh3(xdr, args->fromfh);
1216 encode_diropargs3(xdr, args->tofh, args->toname, args->tolen);
1220 * 3.3.16 READDIR3args
1222 * struct READDIR3args {
1225 * cookieverf3 cookieverf;
1229 static void encode_readdir3args(struct xdr_stream *xdr,
1230 const struct nfs3_readdirargs *args)
1234 encode_nfs_fh3(xdr, args->fh);
1236 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4);
1237 p = xdr_encode_cookie3(p, args->cookie);
1238 p = xdr_encode_cookieverf3(p, args->verf);
1239 *p = cpu_to_be32(args->count);
1242 static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req,
1243 struct xdr_stream *xdr,
1244 const struct nfs3_readdirargs *args)
1246 encode_readdir3args(xdr, args);
1247 prepare_reply_buffer(req, args->pages, 0,
1248 args->count, NFS3_readdirres_sz);
1252 * 3.3.17 READDIRPLUS3args
1254 * struct READDIRPLUS3args {
1257 * cookieverf3 cookieverf;
1262 static void encode_readdirplus3args(struct xdr_stream *xdr,
1263 const struct nfs3_readdirargs *args)
1267 encode_nfs_fh3(xdr, args->fh);
1269 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4);
1270 p = xdr_encode_cookie3(p, args->cookie);
1271 p = xdr_encode_cookieverf3(p, args->verf);
1274 * readdirplus: need dircount + buffer size.
1275 * We just make sure we make dircount big enough
1277 *p++ = cpu_to_be32(args->count >> 3);
1279 *p = cpu_to_be32(args->count);
1282 static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req,
1283 struct xdr_stream *xdr,
1284 const struct nfs3_readdirargs *args)
1286 encode_readdirplus3args(xdr, args);
1287 prepare_reply_buffer(req, args->pages, 0,
1288 args->count, NFS3_readdirres_sz);
1292 * 3.3.21 COMMIT3args
1294 * struct COMMIT3args {
1300 static void encode_commit3args(struct xdr_stream *xdr,
1301 const struct nfs_commitargs *args)
1305 encode_nfs_fh3(xdr, args->fh);
1307 p = xdr_reserve_space(xdr, 8 + 4);
1308 p = xdr_encode_hyper(p, args->offset);
1309 *p = cpu_to_be32(args->count);
1312 static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req,
1313 struct xdr_stream *xdr,
1314 const struct nfs_commitargs *args)
1316 encode_commit3args(xdr, args);
1319 #ifdef CONFIG_NFS_V3_ACL
1321 static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req,
1322 struct xdr_stream *xdr,
1323 const struct nfs3_getaclargs *args)
1325 encode_nfs_fh3(xdr, args->fh);
1326 encode_uint32(xdr, args->mask);
1327 if (args->mask & (NFS_ACL | NFS_DFACL))
1328 prepare_reply_buffer(req, args->pages, 0,
1329 NFSACL_MAXPAGES << PAGE_SHIFT,
1333 static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req,
1334 struct xdr_stream *xdr,
1335 const struct nfs3_setaclargs *args)
1340 encode_nfs_fh3(xdr, NFS_FH(args->inode));
1341 encode_uint32(xdr, args->mask);
1343 base = req->rq_slen;
1344 if (args->npages != 0)
1345 xdr_write_pages(xdr, args->pages, 0, args->len);
1347 xdr_reserve_space(xdr, args->len);
1349 error = nfsacl_encode(xdr->buf, base, args->inode,
1350 (args->mask & NFS_ACL) ?
1351 args->acl_access : NULL, 1, 0);
1352 /* FIXME: this is just broken */
1354 error = nfsacl_encode(xdr->buf, base + error, args->inode,
1355 (args->mask & NFS_DFACL) ?
1356 args->acl_default : NULL, 1,
1361 #endif /* CONFIG_NFS_V3_ACL */
1364 * NFSv3 XDR decode functions
1366 * NFSv3 result types are defined in section 3.3 of RFC 1813:
1367 * "NFS Version 3 Protocol Specification".
1373 * struct GETATTR3resok {
1374 * fattr3 obj_attributes;
1377 * union GETATTR3res switch (nfsstat3 status) {
1379 * GETATTR3resok resok;
1384 static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req,
1385 struct xdr_stream *xdr,
1386 struct nfs_fattr *result)
1388 enum nfs_stat status;
1391 error = decode_nfsstat3(xdr, &status);
1392 if (unlikely(error))
1394 if (status != NFS3_OK)
1396 error = decode_fattr3(xdr, result);
1400 return nfs3_stat_to_errno(status);
1406 * struct SETATTR3resok {
1410 * struct SETATTR3resfail {
1414 * union SETATTR3res switch (nfsstat3 status) {
1416 * SETATTR3resok resok;
1418 * SETATTR3resfail resfail;
1421 static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req,
1422 struct xdr_stream *xdr,
1423 struct nfs_fattr *result)
1425 enum nfs_stat status;
1428 error = decode_nfsstat3(xdr, &status);
1429 if (unlikely(error))
1431 error = decode_wcc_data(xdr, result);
1432 if (unlikely(error))
1434 if (status != NFS3_OK)
1439 return nfs3_stat_to_errno(status);
1445 * struct LOOKUP3resok {
1447 * post_op_attr obj_attributes;
1448 * post_op_attr dir_attributes;
1451 * struct LOOKUP3resfail {
1452 * post_op_attr dir_attributes;
1455 * union LOOKUP3res switch (nfsstat3 status) {
1457 * LOOKUP3resok resok;
1459 * LOOKUP3resfail resfail;
1462 static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
1463 struct xdr_stream *xdr,
1464 struct nfs3_diropres *result)
1466 enum nfs_stat status;
1469 error = decode_nfsstat3(xdr, &status);
1470 if (unlikely(error))
1472 if (status != NFS3_OK)
1474 error = decode_nfs_fh3(xdr, result->fh);
1475 if (unlikely(error))
1477 error = decode_post_op_attr(xdr, result->fattr);
1478 if (unlikely(error))
1480 error = decode_post_op_attr(xdr, result->dir_attr);
1484 error = decode_post_op_attr(xdr, result->dir_attr);
1485 if (unlikely(error))
1487 return nfs3_stat_to_errno(status);
1493 * struct ACCESS3resok {
1494 * post_op_attr obj_attributes;
1498 * struct ACCESS3resfail {
1499 * post_op_attr obj_attributes;
1502 * union ACCESS3res switch (nfsstat3 status) {
1504 * ACCESS3resok resok;
1506 * ACCESS3resfail resfail;
1509 static int nfs3_xdr_dec_access3res(struct rpc_rqst *req,
1510 struct xdr_stream *xdr,
1511 struct nfs3_accessres *result)
1513 enum nfs_stat status;
1516 error = decode_nfsstat3(xdr, &status);
1517 if (unlikely(error))
1519 error = decode_post_op_attr(xdr, result->fattr);
1520 if (unlikely(error))
1522 if (status != NFS3_OK)
1524 error = decode_uint32(xdr, &result->access);
1528 return nfs3_stat_to_errno(status);
1532 * 3.3.5 READLINK3res
1534 * struct READLINK3resok {
1535 * post_op_attr symlink_attributes;
1539 * struct READLINK3resfail {
1540 * post_op_attr symlink_attributes;
1543 * union READLINK3res switch (nfsstat3 status) {
1545 * READLINK3resok resok;
1547 * READLINK3resfail resfail;
1550 static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req,
1551 struct xdr_stream *xdr,
1552 struct nfs_fattr *result)
1554 enum nfs_stat status;
1557 error = decode_nfsstat3(xdr, &status);
1558 if (unlikely(error))
1560 error = decode_post_op_attr(xdr, result);
1561 if (unlikely(error))
1563 if (status != NFS3_OK)
1565 error = decode_nfspath3(xdr);
1569 return nfs3_stat_to_errno(status);
1575 * struct READ3resok {
1576 * post_op_attr file_attributes;
1582 * struct READ3resfail {
1583 * post_op_attr file_attributes;
1586 * union READ3res switch (nfsstat3 status) {
1590 * READ3resfail resfail;
1593 static int decode_read3resok(struct xdr_stream *xdr,
1594 struct nfs_pgio_res *result)
1596 u32 eof, count, ocount, recvd;
1599 p = xdr_inline_decode(xdr, 4 + 4 + 4);
1600 if (unlikely(p == NULL))
1602 count = be32_to_cpup(p++);
1603 eof = be32_to_cpup(p++);
1604 ocount = be32_to_cpup(p++);
1605 if (unlikely(ocount != count))
1607 recvd = xdr_read_pages(xdr, count);
1608 if (unlikely(count > recvd))
1612 result->count = count;
1615 dprintk("NFS: READ count doesn't match length of opaque: "
1616 "count %u != ocount %u\n", count, ocount);
1619 dprintk("NFS: server cheating in read result: "
1620 "count %u > recvd %u\n", count, recvd);
1625 print_overflow_msg(__func__, xdr);
1629 static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1630 struct nfs_pgio_res *result)
1632 enum nfs_stat status;
1635 error = decode_nfsstat3(xdr, &status);
1636 if (unlikely(error))
1638 error = decode_post_op_attr(xdr, result->fattr);
1639 if (unlikely(error))
1641 result->op_status = status;
1642 if (status != NFS3_OK)
1644 error = decode_read3resok(xdr, result);
1648 return nfs3_stat_to_errno(status);
1660 * struct WRITE3resok {
1661 * wcc_data file_wcc;
1663 * stable_how committed;
1667 * struct WRITE3resfail {
1668 * wcc_data file_wcc;
1671 * union WRITE3res switch (nfsstat3 status) {
1673 * WRITE3resok resok;
1675 * WRITE3resfail resfail;
1678 static int decode_write3resok(struct xdr_stream *xdr,
1679 struct nfs_pgio_res *result)
1683 p = xdr_inline_decode(xdr, 4 + 4);
1684 if (unlikely(p == NULL))
1686 result->count = be32_to_cpup(p++);
1687 result->verf->committed = be32_to_cpup(p++);
1688 if (unlikely(result->verf->committed > NFS_FILE_SYNC))
1690 if (decode_writeverf3(xdr, &result->verf->verifier))
1692 return result->count;
1694 dprintk("NFS: bad stable_how value: %u\n", result->verf->committed);
1697 print_overflow_msg(__func__, xdr);
1702 static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1703 struct nfs_pgio_res *result)
1705 enum nfs_stat status;
1708 error = decode_nfsstat3(xdr, &status);
1709 if (unlikely(error))
1711 error = decode_wcc_data(xdr, result->fattr);
1712 if (unlikely(error))
1714 result->op_status = status;
1715 if (status != NFS3_OK)
1717 error = decode_write3resok(xdr, result);
1721 return nfs3_stat_to_errno(status);
1727 * struct CREATE3resok {
1729 * post_op_attr obj_attributes;
1733 * struct CREATE3resfail {
1737 * union CREATE3res switch (nfsstat3 status) {
1739 * CREATE3resok resok;
1741 * CREATE3resfail resfail;
1744 static int decode_create3resok(struct xdr_stream *xdr,
1745 struct nfs3_diropres *result)
1749 error = decode_post_op_fh3(xdr, result->fh);
1750 if (unlikely(error))
1752 error = decode_post_op_attr(xdr, result->fattr);
1753 if (unlikely(error))
1755 /* The server isn't required to return a file handle.
1756 * If it didn't, force the client to perform a LOOKUP
1757 * to determine the correct file handle and attribute
1758 * values for the new object. */
1759 if (result->fh->size == 0)
1760 result->fattr->valid = 0;
1761 error = decode_wcc_data(xdr, result->dir_attr);
1766 static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
1767 struct xdr_stream *xdr,
1768 struct nfs3_diropres *result)
1770 enum nfs_stat status;
1773 error = decode_nfsstat3(xdr, &status);
1774 if (unlikely(error))
1776 if (status != NFS3_OK)
1778 error = decode_create3resok(xdr, result);
1782 error = decode_wcc_data(xdr, result->dir_attr);
1783 if (unlikely(error))
1785 return nfs3_stat_to_errno(status);
1791 * struct REMOVE3resok {
1795 * struct REMOVE3resfail {
1799 * union REMOVE3res switch (nfsstat3 status) {
1801 * REMOVE3resok resok;
1803 * REMOVE3resfail resfail;
1806 static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
1807 struct xdr_stream *xdr,
1808 struct nfs_removeres *result)
1810 enum nfs_stat status;
1813 error = decode_nfsstat3(xdr, &status);
1814 if (unlikely(error))
1816 error = decode_wcc_data(xdr, result->dir_attr);
1817 if (unlikely(error))
1819 if (status != NFS3_OK)
1824 return nfs3_stat_to_errno(status);
1830 * struct RENAME3resok {
1831 * wcc_data fromdir_wcc;
1832 * wcc_data todir_wcc;
1835 * struct RENAME3resfail {
1836 * wcc_data fromdir_wcc;
1837 * wcc_data todir_wcc;
1840 * union RENAME3res switch (nfsstat3 status) {
1842 * RENAME3resok resok;
1844 * RENAME3resfail resfail;
1847 static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
1848 struct xdr_stream *xdr,
1849 struct nfs_renameres *result)
1851 enum nfs_stat status;
1854 error = decode_nfsstat3(xdr, &status);
1855 if (unlikely(error))
1857 error = decode_wcc_data(xdr, result->old_fattr);
1858 if (unlikely(error))
1860 error = decode_wcc_data(xdr, result->new_fattr);
1861 if (unlikely(error))
1863 if (status != NFS3_OK)
1868 return nfs3_stat_to_errno(status);
1874 * struct LINK3resok {
1875 * post_op_attr file_attributes;
1876 * wcc_data linkdir_wcc;
1879 * struct LINK3resfail {
1880 * post_op_attr file_attributes;
1881 * wcc_data linkdir_wcc;
1884 * union LINK3res switch (nfsstat3 status) {
1888 * LINK3resfail resfail;
1891 static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1892 struct nfs3_linkres *result)
1894 enum nfs_stat status;
1897 error = decode_nfsstat3(xdr, &status);
1898 if (unlikely(error))
1900 error = decode_post_op_attr(xdr, result->fattr);
1901 if (unlikely(error))
1903 error = decode_wcc_data(xdr, result->dir_attr);
1904 if (unlikely(error))
1906 if (status != NFS3_OK)
1911 return nfs3_stat_to_errno(status);
1915 * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in
1916 * the local page cache
1917 * @xdr: XDR stream where entry resides
1918 * @entry: buffer to fill in with entry data
1919 * @plus: boolean indicating whether this should be a readdirplus entry
1921 * Returns zero if successful, otherwise a negative errno value is
1924 * This function is not invoked during READDIR reply decoding, but
1925 * rather whenever an application invokes the getdents(2) system call
1926 * on a directory already in our cache.
1934 * fhandle3 filehandle;
1935 * post_op_attr3 attributes;
1936 * entry3 *nextentry;
1940 * struct entryplus3 {
1944 * post_op_attr name_attributes;
1945 * post_op_fh3 name_handle;
1946 * entryplus3 *nextentry;
1949 int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
1952 struct nfs_entry old = *entry;
1956 p = xdr_inline_decode(xdr, 4);
1957 if (unlikely(p == NULL))
1959 if (*p == xdr_zero) {
1960 p = xdr_inline_decode(xdr, 4);
1961 if (unlikely(p == NULL))
1969 error = decode_fileid3(xdr, &entry->ino);
1970 if (unlikely(error))
1973 error = decode_inline_filename3(xdr, &entry->name, &entry->len);
1974 if (unlikely(error))
1977 entry->prev_cookie = entry->cookie;
1978 error = decode_cookie3(xdr, &entry->cookie);
1979 if (unlikely(error))
1982 entry->d_type = DT_UNKNOWN;
1985 entry->fattr->valid = 0;
1986 error = decode_post_op_attr(xdr, entry->fattr);
1987 if (unlikely(error))
1989 if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
1990 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
1992 if (entry->fattr->fileid != entry->ino) {
1993 entry->fattr->mounted_on_fileid = entry->ino;
1994 entry->fattr->valid |= NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
1997 /* In fact, a post_op_fh3: */
1998 p = xdr_inline_decode(xdr, 4);
1999 if (unlikely(p == NULL))
2001 if (*p != xdr_zero) {
2002 error = decode_nfs_fh3(xdr, entry->fh);
2003 if (unlikely(error)) {
2004 if (error == -E2BIG)
2009 zero_nfs_fh3(entry->fh);
2015 print_overflow_msg(__func__, xdr);
2018 dprintk("NFS: directory entry contains invalid file handle\n");
2024 * 3.3.16 READDIR3res
2031 * struct READDIR3resok {
2032 * post_op_attr dir_attributes;
2033 * cookieverf3 cookieverf;
2037 * struct READDIR3resfail {
2038 * post_op_attr dir_attributes;
2041 * union READDIR3res switch (nfsstat3 status) {
2043 * READDIR3resok resok;
2045 * READDIR3resfail resfail;
2048 * Read the directory contents into the page cache, but otherwise
2049 * don't touch them. The actual decoding is done by nfs3_decode_entry()
2050 * during subsequent nfs_readdir() calls.
2052 static int decode_dirlist3(struct xdr_stream *xdr)
2054 return xdr_read_pages(xdr, xdr->buf->page_len);
2057 static int decode_readdir3resok(struct xdr_stream *xdr,
2058 struct nfs3_readdirres *result)
2062 error = decode_post_op_attr(xdr, result->dir_attr);
2063 if (unlikely(error))
2065 /* XXX: do we need to check if result->verf != NULL ? */
2066 error = decode_cookieverf3(xdr, result->verf);
2067 if (unlikely(error))
2069 error = decode_dirlist3(xdr);
2074 static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req,
2075 struct xdr_stream *xdr,
2076 struct nfs3_readdirres *result)
2078 enum nfs_stat status;
2081 error = decode_nfsstat3(xdr, &status);
2082 if (unlikely(error))
2084 if (status != NFS3_OK)
2086 error = decode_readdir3resok(xdr, result);
2090 error = decode_post_op_attr(xdr, result->dir_attr);
2091 if (unlikely(error))
2093 return nfs3_stat_to_errno(status);
2099 * struct FSSTAT3resok {
2100 * post_op_attr obj_attributes;
2110 * struct FSSTAT3resfail {
2111 * post_op_attr obj_attributes;
2114 * union FSSTAT3res switch (nfsstat3 status) {
2116 * FSSTAT3resok resok;
2118 * FSSTAT3resfail resfail;
2121 static int decode_fsstat3resok(struct xdr_stream *xdr,
2122 struct nfs_fsstat *result)
2126 p = xdr_inline_decode(xdr, 8 * 6 + 4);
2127 if (unlikely(p == NULL))
2129 p = xdr_decode_size3(p, &result->tbytes);
2130 p = xdr_decode_size3(p, &result->fbytes);
2131 p = xdr_decode_size3(p, &result->abytes);
2132 p = xdr_decode_size3(p, &result->tfiles);
2133 p = xdr_decode_size3(p, &result->ffiles);
2134 xdr_decode_size3(p, &result->afiles);
2135 /* ignore invarsec */
2138 print_overflow_msg(__func__, xdr);
2142 static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
2143 struct xdr_stream *xdr,
2144 struct nfs_fsstat *result)
2146 enum nfs_stat status;
2149 error = decode_nfsstat3(xdr, &status);
2150 if (unlikely(error))
2152 error = decode_post_op_attr(xdr, result->fattr);
2153 if (unlikely(error))
2155 if (status != NFS3_OK)
2157 error = decode_fsstat3resok(xdr, result);
2161 return nfs3_stat_to_errno(status);
2167 * struct FSINFO3resok {
2168 * post_op_attr obj_attributes;
2176 * size3 maxfilesize;
2177 * nfstime3 time_delta;
2178 * uint32 properties;
2181 * struct FSINFO3resfail {
2182 * post_op_attr obj_attributes;
2185 * union FSINFO3res switch (nfsstat3 status) {
2187 * FSINFO3resok resok;
2189 * FSINFO3resfail resfail;
2192 static int decode_fsinfo3resok(struct xdr_stream *xdr,
2193 struct nfs_fsinfo *result)
2197 p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4);
2198 if (unlikely(p == NULL))
2200 result->rtmax = be32_to_cpup(p++);
2201 result->rtpref = be32_to_cpup(p++);
2202 result->rtmult = be32_to_cpup(p++);
2203 result->wtmax = be32_to_cpup(p++);
2204 result->wtpref = be32_to_cpup(p++);
2205 result->wtmult = be32_to_cpup(p++);
2206 result->dtpref = be32_to_cpup(p++);
2207 p = xdr_decode_size3(p, &result->maxfilesize);
2208 xdr_decode_nfstime3(p, &result->time_delta);
2210 /* ignore properties */
2211 result->lease_time = 0;
2214 print_overflow_msg(__func__, xdr);
2218 static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
2219 struct xdr_stream *xdr,
2220 struct nfs_fsinfo *result)
2222 enum nfs_stat status;
2225 error = decode_nfsstat3(xdr, &status);
2226 if (unlikely(error))
2228 error = decode_post_op_attr(xdr, result->fattr);
2229 if (unlikely(error))
2231 if (status != NFS3_OK)
2233 error = decode_fsinfo3resok(xdr, result);
2237 return nfs3_stat_to_errno(status);
2241 * 3.3.20 PATHCONF3res
2243 * struct PATHCONF3resok {
2244 * post_op_attr obj_attributes;
2248 * bool chown_restricted;
2249 * bool case_insensitive;
2250 * bool case_preserving;
2253 * struct PATHCONF3resfail {
2254 * post_op_attr obj_attributes;
2257 * union PATHCONF3res switch (nfsstat3 status) {
2259 * PATHCONF3resok resok;
2261 * PATHCONF3resfail resfail;
2264 static int decode_pathconf3resok(struct xdr_stream *xdr,
2265 struct nfs_pathconf *result)
2269 p = xdr_inline_decode(xdr, 4 * 6);
2270 if (unlikely(p == NULL))
2272 result->max_link = be32_to_cpup(p++);
2273 result->max_namelen = be32_to_cpup(p);
2274 /* ignore remaining fields */
2277 print_overflow_msg(__func__, xdr);
2281 static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
2282 struct xdr_stream *xdr,
2283 struct nfs_pathconf *result)
2285 enum nfs_stat status;
2288 error = decode_nfsstat3(xdr, &status);
2289 if (unlikely(error))
2291 error = decode_post_op_attr(xdr, result->fattr);
2292 if (unlikely(error))
2294 if (status != NFS3_OK)
2296 error = decode_pathconf3resok(xdr, result);
2300 return nfs3_stat_to_errno(status);
2306 * struct COMMIT3resok {
2307 * wcc_data file_wcc;
2311 * struct COMMIT3resfail {
2312 * wcc_data file_wcc;
2315 * union COMMIT3res switch (nfsstat3 status) {
2317 * COMMIT3resok resok;
2319 * COMMIT3resfail resfail;
2322 static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
2323 struct xdr_stream *xdr,
2324 struct nfs_commitres *result)
2326 enum nfs_stat status;
2329 error = decode_nfsstat3(xdr, &status);
2330 if (unlikely(error))
2332 error = decode_wcc_data(xdr, result->fattr);
2333 if (unlikely(error))
2335 result->op_status = status;
2336 if (status != NFS3_OK)
2338 error = decode_writeverf3(xdr, &result->verf->verifier);
2342 return nfs3_stat_to_errno(status);
2345 #ifdef CONFIG_NFS_V3_ACL
2347 static inline int decode_getacl3resok(struct xdr_stream *xdr,
2348 struct nfs3_getaclres *result)
2350 struct posix_acl **acl;
2351 unsigned int *aclcnt;
2355 error = decode_post_op_attr(xdr, result->fattr);
2356 if (unlikely(error))
2358 error = decode_uint32(xdr, &result->mask);
2359 if (unlikely(error))
2362 if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
2365 hdrlen = xdr_stream_pos(xdr);
2368 if (result->mask & NFS_ACL)
2369 acl = &result->acl_access;
2371 if (result->mask & NFS_ACLCNT)
2372 aclcnt = &result->acl_access_count;
2373 error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl);
2374 if (unlikely(error <= 0))
2378 if (result->mask & NFS_DFACL)
2379 acl = &result->acl_default;
2381 if (result->mask & NFS_DFACLCNT)
2382 aclcnt = &result->acl_default_count;
2383 error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl);
2384 if (unlikely(error <= 0))
2391 static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req,
2392 struct xdr_stream *xdr,
2393 struct nfs3_getaclres *result)
2395 enum nfs_stat status;
2398 error = decode_nfsstat3(xdr, &status);
2399 if (unlikely(error))
2401 if (status != NFS3_OK)
2403 error = decode_getacl3resok(xdr, result);
2407 return nfs3_stat_to_errno(status);
2410 static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
2411 struct xdr_stream *xdr,
2412 struct nfs_fattr *result)
2414 enum nfs_stat status;
2417 error = decode_nfsstat3(xdr, &status);
2418 if (unlikely(error))
2420 if (status != NFS3_OK)
2422 error = decode_post_op_attr(xdr, result);
2426 return nfs3_stat_to_errno(status);
2429 #endif /* CONFIG_NFS_V3_ACL */
2433 * We need to translate between nfs status return values and
2434 * the local errno values which may not be the same.
2436 static const struct {
2441 { NFSERR_PERM, -EPERM },
2442 { NFSERR_NOENT, -ENOENT },
2443 { NFSERR_IO, -errno_NFSERR_IO},
2444 { NFSERR_NXIO, -ENXIO },
2445 /* { NFSERR_EAGAIN, -EAGAIN }, */
2446 { NFSERR_ACCES, -EACCES },
2447 { NFSERR_EXIST, -EEXIST },
2448 { NFSERR_XDEV, -EXDEV },
2449 { NFSERR_NODEV, -ENODEV },
2450 { NFSERR_NOTDIR, -ENOTDIR },
2451 { NFSERR_ISDIR, -EISDIR },
2452 { NFSERR_INVAL, -EINVAL },
2453 { NFSERR_FBIG, -EFBIG },
2454 { NFSERR_NOSPC, -ENOSPC },
2455 { NFSERR_ROFS, -EROFS },
2456 { NFSERR_MLINK, -EMLINK },
2457 { NFSERR_NAMETOOLONG, -ENAMETOOLONG },
2458 { NFSERR_NOTEMPTY, -ENOTEMPTY },
2459 { NFSERR_DQUOT, -EDQUOT },
2460 { NFSERR_STALE, -ESTALE },
2461 { NFSERR_REMOTE, -EREMOTE },
2463 { NFSERR_WFLUSH, -EWFLUSH },
2465 { NFSERR_BADHANDLE, -EBADHANDLE },
2466 { NFSERR_NOT_SYNC, -ENOTSYNC },
2467 { NFSERR_BAD_COOKIE, -EBADCOOKIE },
2468 { NFSERR_NOTSUPP, -ENOTSUPP },
2469 { NFSERR_TOOSMALL, -ETOOSMALL },
2470 { NFSERR_SERVERFAULT, -EREMOTEIO },
2471 { NFSERR_BADTYPE, -EBADTYPE },
2472 { NFSERR_JUKEBOX, -EJUKEBOX },
2477 * nfs3_stat_to_errno - convert an NFS status code to a local errno
2478 * @status: NFS status code to convert
2480 * Returns a local errno value, or -EIO if the NFS status code is
2481 * not recognized. This function is used jointly by NFSv2 and NFSv3.
2483 static int nfs3_stat_to_errno(enum nfs_stat status)
2487 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
2488 if (nfs_errtbl[i].stat == (int)status)
2489 return nfs_errtbl[i].errno;
2491 dprintk("NFS: Unrecognized nfs status value: %u\n", status);
2492 return nfs_errtbl[i].errno;
2496 #define PROC(proc, argtype, restype, timer) \
2497 [NFS3PROC_##proc] = { \
2498 .p_proc = NFS3PROC_##proc, \
2499 .p_encode = (kxdreproc_t)nfs3_xdr_enc_##argtype##3args, \
2500 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_##restype##3res, \
2501 .p_arglen = NFS3_##argtype##args_sz, \
2502 .p_replen = NFS3_##restype##res_sz, \
2504 .p_statidx = NFS3PROC_##proc, \
2508 struct rpc_procinfo nfs3_procedures[] = {
2509 PROC(GETATTR, getattr, getattr, 1),
2510 PROC(SETATTR, setattr, setattr, 0),
2511 PROC(LOOKUP, lookup, lookup, 2),
2512 PROC(ACCESS, access, access, 1),
2513 PROC(READLINK, readlink, readlink, 3),
2514 PROC(READ, read, read, 3),
2515 PROC(WRITE, write, write, 4),
2516 PROC(CREATE, create, create, 0),
2517 PROC(MKDIR, mkdir, create, 0),
2518 PROC(SYMLINK, symlink, create, 0),
2519 PROC(MKNOD, mknod, create, 0),
2520 PROC(REMOVE, remove, remove, 0),
2521 PROC(RMDIR, lookup, setattr, 0),
2522 PROC(RENAME, rename, rename, 0),
2523 PROC(LINK, link, link, 0),
2524 PROC(READDIR, readdir, readdir, 3),
2525 PROC(READDIRPLUS, readdirplus, readdir, 3),
2526 PROC(FSSTAT, getattr, fsstat, 0),
2527 PROC(FSINFO, getattr, fsinfo, 0),
2528 PROC(PATHCONF, getattr, pathconf, 0),
2529 PROC(COMMIT, commit, commit, 5),
2532 const struct rpc_version nfs_version3 = {
2534 .nrprocs = ARRAY_SIZE(nfs3_procedures),
2535 .procs = nfs3_procedures
2538 #ifdef CONFIG_NFS_V3_ACL
2539 static struct rpc_procinfo nfs3_acl_procedures[] = {
2540 [ACLPROC3_GETACL] = {
2541 .p_proc = ACLPROC3_GETACL,
2542 .p_encode = (kxdreproc_t)nfs3_xdr_enc_getacl3args,
2543 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_getacl3res,
2544 .p_arglen = ACL3_getaclargs_sz,
2545 .p_replen = ACL3_getaclres_sz,
2549 [ACLPROC3_SETACL] = {
2550 .p_proc = ACLPROC3_SETACL,
2551 .p_encode = (kxdreproc_t)nfs3_xdr_enc_setacl3args,
2552 .p_decode = (kxdrdproc_t)nfs3_xdr_dec_setacl3res,
2553 .p_arglen = ACL3_setaclargs_sz,
2554 .p_replen = ACL3_setaclres_sz,
2560 const struct rpc_version nfsacl_version3 = {
2562 .nrprocs = sizeof(nfs3_acl_procedures)/
2563 sizeof(nfs3_acl_procedures[0]),
2564 .procs = nfs3_acl_procedures,
2566 #endif /* CONFIG_NFS_V3_ACL */