1 // SPDX-License-Identifier: GPL-2.0
3 * linux/fs/nfs/nfs3xdr.c
5 * XDR functions to encode/decode NFSv3 RPC arguments and results.
7 * Copyright (C) 1996, 1997 Olaf Kirch
10 #include <linux/param.h>
11 #include <linux/time.h>
13 #include <linux/errno.h>
14 #include <linux/string.h>
16 #include <linux/pagemap.h>
17 #include <linux/proc_fs.h>
18 #include <linux/kdev_t.h>
19 #include <linux/sunrpc/clnt.h>
20 #include <linux/nfs.h>
21 #include <linux/nfs3.h>
22 #include <linux/nfs_fs.h>
23 #include <linux/nfsacl.h>
26 #define NFSDBG_FACILITY NFSDBG_XDR
28 /* Mapping from NFS error code to "errno" error code. */
29 #define errno_NFSERR_IO EIO
32 * Declare the space requirements for NFS arguments and replies as
33 * number of 32bit-words
35 #define NFS3_fhandle_sz (1+16)
36 #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
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_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)
569 * In order to make only a single xdr_reserve_space() call,
570 * pre-compute the total number of bytes to be reserved.
571 * Six boolean values, one for each set_foo field, are always
572 * present in the encoded result, so start there.
575 if (attr->ia_valid & ATTR_MODE)
577 if (attr->ia_valid & ATTR_UID)
579 if (attr->ia_valid & ATTR_GID)
581 if (attr->ia_valid & ATTR_SIZE)
583 if (attr->ia_valid & ATTR_ATIME_SET)
585 if (attr->ia_valid & ATTR_MTIME_SET)
587 p = xdr_reserve_space(xdr, nbytes);
589 if (attr->ia_valid & ATTR_MODE) {
591 *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO);
595 if (attr->ia_valid & ATTR_UID) {
597 *p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid));
601 if (attr->ia_valid & ATTR_GID) {
603 *p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid));
607 if (attr->ia_valid & ATTR_SIZE) {
609 p = xdr_encode_hyper(p, (u64)attr->ia_size);
613 if (attr->ia_valid & ATTR_ATIME_SET) {
616 ts = timespec64_to_timespec(attr->ia_atime);
617 p = xdr_encode_nfstime3(p, &ts);
618 } else if (attr->ia_valid & ATTR_ATIME) {
623 if (attr->ia_valid & ATTR_MTIME_SET) {
625 ts = timespec64_to_timespec(attr->ia_mtime);
626 xdr_encode_nfstime3(p, &ts);
627 } else if (attr->ia_valid & ATTR_MTIME) {
652 static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
657 p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2);
658 if (unlikely(p == NULL))
661 p = xdr_decode_ftype3(p, &fmode);
663 fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode;
664 fattr->nlink = be32_to_cpup(p++);
665 fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++));
666 if (!uid_valid(fattr->uid))
668 fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++));
669 if (!gid_valid(fattr->gid))
672 p = xdr_decode_size3(p, &fattr->size);
673 p = xdr_decode_size3(p, &fattr->du.nfs3.used);
674 p = xdr_decode_specdata3(p, &fattr->rdev);
676 p = xdr_decode_hyper(p, &fattr->fsid.major);
677 fattr->fsid.minor = 0;
679 p = xdr_decode_fileid3(p, &fattr->fileid);
680 p = xdr_decode_nfstime3(p, &fattr->atime);
681 p = xdr_decode_nfstime3(p, &fattr->mtime);
682 xdr_decode_nfstime3(p, &fattr->ctime);
683 fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime);
685 fattr->valid |= NFS_ATTR_FATTR_V3;
688 dprintk("NFS: returned invalid uid\n");
691 dprintk("NFS: returned invalid gid\n");
694 print_overflow_msg(__func__, xdr);
701 * union post_op_attr switch (bool attributes_follow) {
708 static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
712 p = xdr_inline_decode(xdr, 4);
713 if (unlikely(p == NULL))
716 return decode_fattr3(xdr, fattr);
719 print_overflow_msg(__func__, xdr);
731 static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
735 p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2);
736 if (unlikely(p == NULL))
739 fattr->valid |= NFS_ATTR_FATTR_PRESIZE
740 | NFS_ATTR_FATTR_PRECHANGE
741 | NFS_ATTR_FATTR_PREMTIME
742 | NFS_ATTR_FATTR_PRECTIME;
744 p = xdr_decode_size3(p, &fattr->pre_size);
745 p = xdr_decode_nfstime3(p, &fattr->pre_mtime);
746 xdr_decode_nfstime3(p, &fattr->pre_ctime);
747 fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime);
751 print_overflow_msg(__func__, xdr);
757 * union pre_op_attr switch (bool attributes_follow) {
759 * wcc_attr attributes;
767 * pre_op_attr before;
768 * post_op_attr after;
771 static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
775 p = xdr_inline_decode(xdr, 4);
776 if (unlikely(p == NULL))
779 return decode_wcc_attr(xdr, fattr);
782 print_overflow_msg(__func__, xdr);
786 static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr)
790 error = decode_pre_op_attr(xdr, fattr);
793 error = decode_post_op_attr(xdr, fattr);
801 * union post_op_fh3 switch (bool handle_follows) {
808 static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
810 __be32 *p = xdr_inline_decode(xdr, 4);
811 if (unlikely(p == NULL))
814 return decode_nfs_fh3(xdr, fh);
818 print_overflow_msg(__func__, xdr);
825 * struct diropargs3 {
830 static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh,
831 const char *name, u32 length)
833 encode_nfs_fh3(xdr, fh);
834 encode_filename3(xdr, name, length);
839 * NFSv3 XDR encode functions
841 * NFSv3 argument types are defined in section 3.3 of RFC 1813:
842 * "NFS Version 3 Protocol Specification".
848 * struct GETATTR3args {
852 static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req,
853 struct xdr_stream *xdr,
856 const struct nfs_fh *fh = data;
858 encode_nfs_fh3(xdr, fh);
864 * union sattrguard3 switch (bool check) {
866 * nfstime3 obj_ctime;
871 * struct SETATTR3args {
873 * sattr3 new_attributes;
877 static void encode_sattrguard3(struct xdr_stream *xdr,
878 const struct nfs3_sattrargs *args)
883 p = xdr_reserve_space(xdr, 4 + 8);
885 xdr_encode_nfstime3(p, &args->guardtime);
887 p = xdr_reserve_space(xdr, 4);
892 static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req,
893 struct xdr_stream *xdr,
896 const struct nfs3_sattrargs *args = data;
897 encode_nfs_fh3(xdr, args->fh);
898 encode_sattr3(xdr, args->sattr);
899 encode_sattrguard3(xdr, args);
905 * struct LOOKUP3args {
909 static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req,
910 struct xdr_stream *xdr,
913 const struct nfs3_diropargs *args = data;
915 encode_diropargs3(xdr, args->fh, args->name, args->len);
921 * struct ACCESS3args {
926 static void encode_access3args(struct xdr_stream *xdr,
927 const struct nfs3_accessargs *args)
929 encode_nfs_fh3(xdr, args->fh);
930 encode_uint32(xdr, args->access);
933 static void nfs3_xdr_enc_access3args(struct rpc_rqst *req,
934 struct xdr_stream *xdr,
937 const struct nfs3_accessargs *args = data;
939 encode_access3args(xdr, args);
943 * 3.3.5 READLINK3args
945 * struct READLINK3args {
949 static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req,
950 struct xdr_stream *xdr,
953 const struct nfs3_readlinkargs *args = data;
955 encode_nfs_fh3(xdr, args->fh);
956 prepare_reply_buffer(req, args->pages, args->pgbase,
957 args->pglen, NFS3_readlinkres_sz);
969 static void encode_read3args(struct xdr_stream *xdr,
970 const struct nfs_pgio_args *args)
974 encode_nfs_fh3(xdr, args->fh);
976 p = xdr_reserve_space(xdr, 8 + 4);
977 p = xdr_encode_hyper(p, args->offset);
978 *p = cpu_to_be32(args->count);
981 static void nfs3_xdr_enc_read3args(struct rpc_rqst *req,
982 struct xdr_stream *xdr,
985 const struct nfs_pgio_args *args = data;
987 encode_read3args(xdr, args);
988 prepare_reply_buffer(req, args->pages, args->pgbase,
989 args->count, NFS3_readres_sz);
990 req->rq_rcv_buf.flags |= XDRBUF_READ;
1002 * struct WRITE3args {
1006 * stable_how stable;
1010 static void encode_write3args(struct xdr_stream *xdr,
1011 const struct nfs_pgio_args *args)
1015 encode_nfs_fh3(xdr, args->fh);
1017 p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4);
1018 p = xdr_encode_hyper(p, args->offset);
1019 *p++ = cpu_to_be32(args->count);
1020 *p++ = cpu_to_be32(args->stable);
1021 *p = cpu_to_be32(args->count);
1022 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1025 static void nfs3_xdr_enc_write3args(struct rpc_rqst *req,
1026 struct xdr_stream *xdr,
1029 const struct nfs_pgio_args *args = data;
1031 encode_write3args(xdr, args);
1032 xdr->buf->flags |= XDRBUF_WRITE;
1038 * enum createmode3 {
1044 * union createhow3 switch (createmode3 mode) {
1047 * sattr3 obj_attributes;
1052 * struct CREATE3args {
1057 static void encode_createhow3(struct xdr_stream *xdr,
1058 const struct nfs3_createargs *args)
1060 encode_uint32(xdr, args->createmode);
1061 switch (args->createmode) {
1062 case NFS3_CREATE_UNCHECKED:
1063 case NFS3_CREATE_GUARDED:
1064 encode_sattr3(xdr, args->sattr);
1066 case NFS3_CREATE_EXCLUSIVE:
1067 encode_createverf3(xdr, args->verifier);
1074 static void nfs3_xdr_enc_create3args(struct rpc_rqst *req,
1075 struct xdr_stream *xdr,
1078 const struct nfs3_createargs *args = data;
1080 encode_diropargs3(xdr, args->fh, args->name, args->len);
1081 encode_createhow3(xdr, args);
1087 * struct MKDIR3args {
1089 * sattr3 attributes;
1092 static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
1093 struct xdr_stream *xdr,
1096 const struct nfs3_mkdirargs *args = data;
1098 encode_diropargs3(xdr, args->fh, args->name, args->len);
1099 encode_sattr3(xdr, args->sattr);
1103 * 3.3.10 SYMLINK3args
1105 * struct symlinkdata3 {
1106 * sattr3 symlink_attributes;
1107 * nfspath3 symlink_data;
1110 * struct SYMLINK3args {
1112 * symlinkdata3 symlink;
1115 static void encode_symlinkdata3(struct xdr_stream *xdr,
1118 const struct nfs3_symlinkargs *args = data;
1120 encode_sattr3(xdr, args->sattr);
1121 encode_nfspath3(xdr, args->pages, args->pathlen);
1124 static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
1125 struct xdr_stream *xdr,
1128 const struct nfs3_symlinkargs *args = data;
1130 encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
1131 encode_symlinkdata3(xdr, args);
1132 xdr->buf->flags |= XDRBUF_WRITE;
1138 * struct devicedata3 {
1139 * sattr3 dev_attributes;
1143 * union mknoddata3 switch (ftype3 type) {
1146 * devicedata3 device;
1149 * sattr3 pipe_attributes;
1154 * struct MKNOD3args {
1159 static void encode_devicedata3(struct xdr_stream *xdr,
1160 const struct nfs3_mknodargs *args)
1162 encode_sattr3(xdr, args->sattr);
1163 encode_specdata3(xdr, args->rdev);
1166 static void encode_mknoddata3(struct xdr_stream *xdr,
1167 const struct nfs3_mknodargs *args)
1169 encode_ftype3(xdr, args->type);
1170 switch (args->type) {
1173 encode_devicedata3(xdr, args);
1177 encode_sattr3(xdr, args->sattr);
1187 static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req,
1188 struct xdr_stream *xdr,
1191 const struct nfs3_mknodargs *args = data;
1193 encode_diropargs3(xdr, args->fh, args->name, args->len);
1194 encode_mknoddata3(xdr, args);
1198 * 3.3.12 REMOVE3args
1200 * struct REMOVE3args {
1201 * diropargs3 object;
1204 static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req,
1205 struct xdr_stream *xdr,
1208 const struct nfs_removeargs *args = data;
1210 encode_diropargs3(xdr, args->fh, args->name.name, args->name.len);
1214 * 3.3.14 RENAME3args
1216 * struct RENAME3args {
1221 static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req,
1222 struct xdr_stream *xdr,
1225 const struct nfs_renameargs *args = data;
1226 const struct qstr *old = args->old_name;
1227 const struct qstr *new = args->new_name;
1229 encode_diropargs3(xdr, args->old_dir, old->name, old->len);
1230 encode_diropargs3(xdr, args->new_dir, new->name, new->len);
1236 * struct LINK3args {
1241 static void nfs3_xdr_enc_link3args(struct rpc_rqst *req,
1242 struct xdr_stream *xdr,
1245 const struct nfs3_linkargs *args = data;
1247 encode_nfs_fh3(xdr, args->fromfh);
1248 encode_diropargs3(xdr, args->tofh, args->toname, args->tolen);
1252 * 3.3.16 READDIR3args
1254 * struct READDIR3args {
1257 * cookieverf3 cookieverf;
1261 static void encode_readdir3args(struct xdr_stream *xdr,
1262 const struct nfs3_readdirargs *args)
1266 encode_nfs_fh3(xdr, args->fh);
1268 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4);
1269 p = xdr_encode_cookie3(p, args->cookie);
1270 p = xdr_encode_cookieverf3(p, args->verf);
1271 *p = cpu_to_be32(args->count);
1274 static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req,
1275 struct xdr_stream *xdr,
1278 const struct nfs3_readdirargs *args = data;
1280 encode_readdir3args(xdr, args);
1281 prepare_reply_buffer(req, args->pages, 0,
1282 args->count, NFS3_readdirres_sz);
1286 * 3.3.17 READDIRPLUS3args
1288 * struct READDIRPLUS3args {
1291 * cookieverf3 cookieverf;
1296 static void encode_readdirplus3args(struct xdr_stream *xdr,
1297 const struct nfs3_readdirargs *args)
1301 encode_nfs_fh3(xdr, args->fh);
1303 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4);
1304 p = xdr_encode_cookie3(p, args->cookie);
1305 p = xdr_encode_cookieverf3(p, args->verf);
1308 * readdirplus: need dircount + buffer size.
1309 * We just make sure we make dircount big enough
1311 *p++ = cpu_to_be32(args->count >> 3);
1313 *p = cpu_to_be32(args->count);
1316 static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req,
1317 struct xdr_stream *xdr,
1320 const struct nfs3_readdirargs *args = data;
1322 encode_readdirplus3args(xdr, args);
1323 prepare_reply_buffer(req, args->pages, 0,
1324 args->count, NFS3_readdirres_sz);
1328 * 3.3.21 COMMIT3args
1330 * struct COMMIT3args {
1336 static void encode_commit3args(struct xdr_stream *xdr,
1337 const struct nfs_commitargs *args)
1341 encode_nfs_fh3(xdr, args->fh);
1343 p = xdr_reserve_space(xdr, 8 + 4);
1344 p = xdr_encode_hyper(p, args->offset);
1345 *p = cpu_to_be32(args->count);
1348 static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req,
1349 struct xdr_stream *xdr,
1352 const struct nfs_commitargs *args = data;
1354 encode_commit3args(xdr, args);
1357 #ifdef CONFIG_NFS_V3_ACL
1359 static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req,
1360 struct xdr_stream *xdr,
1363 const struct nfs3_getaclargs *args = data;
1365 encode_nfs_fh3(xdr, args->fh);
1366 encode_uint32(xdr, args->mask);
1367 if (args->mask & (NFS_ACL | NFS_DFACL))
1368 prepare_reply_buffer(req, args->pages, 0,
1369 NFSACL_MAXPAGES << PAGE_SHIFT,
1373 static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req,
1374 struct xdr_stream *xdr,
1377 const struct nfs3_setaclargs *args = data;
1381 encode_nfs_fh3(xdr, NFS_FH(args->inode));
1382 encode_uint32(xdr, args->mask);
1384 base = req->rq_slen;
1385 if (args->npages != 0)
1386 xdr_write_pages(xdr, args->pages, 0, args->len);
1388 xdr_reserve_space(xdr, args->len);
1390 error = nfsacl_encode(xdr->buf, base, args->inode,
1391 (args->mask & NFS_ACL) ?
1392 args->acl_access : NULL, 1, 0);
1393 /* FIXME: this is just broken */
1395 error = nfsacl_encode(xdr->buf, base + error, args->inode,
1396 (args->mask & NFS_DFACL) ?
1397 args->acl_default : NULL, 1,
1402 #endif /* CONFIG_NFS_V3_ACL */
1405 * NFSv3 XDR decode functions
1407 * NFSv3 result types are defined in section 3.3 of RFC 1813:
1408 * "NFS Version 3 Protocol Specification".
1414 * struct GETATTR3resok {
1415 * fattr3 obj_attributes;
1418 * union GETATTR3res switch (nfsstat3 status) {
1420 * GETATTR3resok resok;
1425 static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req,
1426 struct xdr_stream *xdr,
1429 enum nfs_stat status;
1432 error = decode_nfsstat3(xdr, &status);
1433 if (unlikely(error))
1435 if (status != NFS3_OK)
1437 error = decode_fattr3(xdr, result);
1441 return nfs3_stat_to_errno(status);
1447 * struct SETATTR3resok {
1451 * struct SETATTR3resfail {
1455 * union SETATTR3res switch (nfsstat3 status) {
1457 * SETATTR3resok resok;
1459 * SETATTR3resfail resfail;
1462 static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req,
1463 struct xdr_stream *xdr,
1466 enum nfs_stat status;
1469 error = decode_nfsstat3(xdr, &status);
1470 if (unlikely(error))
1472 error = decode_wcc_data(xdr, result);
1473 if (unlikely(error))
1475 if (status != NFS3_OK)
1480 return nfs3_stat_to_errno(status);
1486 * struct LOOKUP3resok {
1488 * post_op_attr obj_attributes;
1489 * post_op_attr dir_attributes;
1492 * struct LOOKUP3resfail {
1493 * post_op_attr dir_attributes;
1496 * union LOOKUP3res switch (nfsstat3 status) {
1498 * LOOKUP3resok resok;
1500 * LOOKUP3resfail resfail;
1503 static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
1504 struct xdr_stream *xdr,
1507 struct nfs3_diropres *result = data;
1508 enum nfs_stat status;
1511 error = decode_nfsstat3(xdr, &status);
1512 if (unlikely(error))
1514 if (status != NFS3_OK)
1516 error = decode_nfs_fh3(xdr, result->fh);
1517 if (unlikely(error))
1519 error = decode_post_op_attr(xdr, result->fattr);
1520 if (unlikely(error))
1522 error = decode_post_op_attr(xdr, result->dir_attr);
1526 error = decode_post_op_attr(xdr, result->dir_attr);
1527 if (unlikely(error))
1529 return nfs3_stat_to_errno(status);
1535 * struct ACCESS3resok {
1536 * post_op_attr obj_attributes;
1540 * struct ACCESS3resfail {
1541 * post_op_attr obj_attributes;
1544 * union ACCESS3res switch (nfsstat3 status) {
1546 * ACCESS3resok resok;
1548 * ACCESS3resfail resfail;
1551 static int nfs3_xdr_dec_access3res(struct rpc_rqst *req,
1552 struct xdr_stream *xdr,
1555 struct nfs3_accessres *result = data;
1556 enum nfs_stat status;
1559 error = decode_nfsstat3(xdr, &status);
1560 if (unlikely(error))
1562 error = decode_post_op_attr(xdr, result->fattr);
1563 if (unlikely(error))
1565 if (status != NFS3_OK)
1567 error = decode_uint32(xdr, &result->access);
1571 return nfs3_stat_to_errno(status);
1575 * 3.3.5 READLINK3res
1577 * struct READLINK3resok {
1578 * post_op_attr symlink_attributes;
1582 * struct READLINK3resfail {
1583 * post_op_attr symlink_attributes;
1586 * union READLINK3res switch (nfsstat3 status) {
1588 * READLINK3resok resok;
1590 * READLINK3resfail resfail;
1593 static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req,
1594 struct xdr_stream *xdr,
1597 enum nfs_stat status;
1600 error = decode_nfsstat3(xdr, &status);
1601 if (unlikely(error))
1603 error = decode_post_op_attr(xdr, result);
1604 if (unlikely(error))
1606 if (status != NFS3_OK)
1608 error = decode_nfspath3(xdr);
1612 return nfs3_stat_to_errno(status);
1618 * struct READ3resok {
1619 * post_op_attr file_attributes;
1625 * struct READ3resfail {
1626 * post_op_attr file_attributes;
1629 * union READ3res switch (nfsstat3 status) {
1633 * READ3resfail resfail;
1636 static int decode_read3resok(struct xdr_stream *xdr,
1637 struct nfs_pgio_res *result)
1639 u32 eof, count, ocount, recvd;
1642 p = xdr_inline_decode(xdr, 4 + 4 + 4);
1643 if (unlikely(p == NULL))
1645 count = be32_to_cpup(p++);
1646 eof = be32_to_cpup(p++);
1647 ocount = be32_to_cpup(p++);
1648 if (unlikely(ocount != count))
1650 recvd = xdr_read_pages(xdr, count);
1651 if (unlikely(count > recvd))
1655 result->count = count;
1658 dprintk("NFS: READ count doesn't match length of opaque: "
1659 "count %u != ocount %u\n", count, ocount);
1662 dprintk("NFS: server cheating in read result: "
1663 "count %u > recvd %u\n", count, recvd);
1668 print_overflow_msg(__func__, xdr);
1672 static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1675 struct nfs_pgio_res *result = data;
1676 enum nfs_stat status;
1679 error = decode_nfsstat3(xdr, &status);
1680 if (unlikely(error))
1682 error = decode_post_op_attr(xdr, result->fattr);
1683 if (unlikely(error))
1685 result->op_status = status;
1686 if (status != NFS3_OK)
1688 error = decode_read3resok(xdr, result);
1692 return nfs3_stat_to_errno(status);
1704 * struct WRITE3resok {
1705 * wcc_data file_wcc;
1707 * stable_how committed;
1711 * struct WRITE3resfail {
1712 * wcc_data file_wcc;
1715 * union WRITE3res switch (nfsstat3 status) {
1717 * WRITE3resok resok;
1719 * WRITE3resfail resfail;
1722 static int decode_write3resok(struct xdr_stream *xdr,
1723 struct nfs_pgio_res *result)
1727 p = xdr_inline_decode(xdr, 4 + 4);
1728 if (unlikely(p == NULL))
1730 result->count = be32_to_cpup(p++);
1731 result->verf->committed = be32_to_cpup(p++);
1732 if (unlikely(result->verf->committed > NFS_FILE_SYNC))
1734 if (decode_writeverf3(xdr, &result->verf->verifier))
1736 return result->count;
1738 dprintk("NFS: bad stable_how value: %u\n", result->verf->committed);
1741 print_overflow_msg(__func__, xdr);
1746 static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1749 struct nfs_pgio_res *result = data;
1750 enum nfs_stat status;
1753 error = decode_nfsstat3(xdr, &status);
1754 if (unlikely(error))
1756 error = decode_wcc_data(xdr, result->fattr);
1757 if (unlikely(error))
1759 result->op_status = status;
1760 if (status != NFS3_OK)
1762 error = decode_write3resok(xdr, result);
1766 return nfs3_stat_to_errno(status);
1772 * struct CREATE3resok {
1774 * post_op_attr obj_attributes;
1778 * struct CREATE3resfail {
1782 * union CREATE3res switch (nfsstat3 status) {
1784 * CREATE3resok resok;
1786 * CREATE3resfail resfail;
1789 static int decode_create3resok(struct xdr_stream *xdr,
1790 struct nfs3_diropres *result)
1794 error = decode_post_op_fh3(xdr, result->fh);
1795 if (unlikely(error))
1797 error = decode_post_op_attr(xdr, result->fattr);
1798 if (unlikely(error))
1800 /* The server isn't required to return a file handle.
1801 * If it didn't, force the client to perform a LOOKUP
1802 * to determine the correct file handle and attribute
1803 * values for the new object. */
1804 if (result->fh->size == 0)
1805 result->fattr->valid = 0;
1806 error = decode_wcc_data(xdr, result->dir_attr);
1811 static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
1812 struct xdr_stream *xdr,
1815 struct nfs3_diropres *result = data;
1816 enum nfs_stat status;
1819 error = decode_nfsstat3(xdr, &status);
1820 if (unlikely(error))
1822 if (status != NFS3_OK)
1824 error = decode_create3resok(xdr, result);
1828 error = decode_wcc_data(xdr, result->dir_attr);
1829 if (unlikely(error))
1831 return nfs3_stat_to_errno(status);
1837 * struct REMOVE3resok {
1841 * struct REMOVE3resfail {
1845 * union REMOVE3res switch (nfsstat3 status) {
1847 * REMOVE3resok resok;
1849 * REMOVE3resfail resfail;
1852 static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
1853 struct xdr_stream *xdr,
1856 struct nfs_removeres *result = data;
1857 enum nfs_stat status;
1860 error = decode_nfsstat3(xdr, &status);
1861 if (unlikely(error))
1863 error = decode_wcc_data(xdr, result->dir_attr);
1864 if (unlikely(error))
1866 if (status != NFS3_OK)
1871 return nfs3_stat_to_errno(status);
1877 * struct RENAME3resok {
1878 * wcc_data fromdir_wcc;
1879 * wcc_data todir_wcc;
1882 * struct RENAME3resfail {
1883 * wcc_data fromdir_wcc;
1884 * wcc_data todir_wcc;
1887 * union RENAME3res switch (nfsstat3 status) {
1889 * RENAME3resok resok;
1891 * RENAME3resfail resfail;
1894 static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
1895 struct xdr_stream *xdr,
1898 struct nfs_renameres *result = data;
1899 enum nfs_stat status;
1902 error = decode_nfsstat3(xdr, &status);
1903 if (unlikely(error))
1905 error = decode_wcc_data(xdr, result->old_fattr);
1906 if (unlikely(error))
1908 error = decode_wcc_data(xdr, result->new_fattr);
1909 if (unlikely(error))
1911 if (status != NFS3_OK)
1916 return nfs3_stat_to_errno(status);
1922 * struct LINK3resok {
1923 * post_op_attr file_attributes;
1924 * wcc_data linkdir_wcc;
1927 * struct LINK3resfail {
1928 * post_op_attr file_attributes;
1929 * wcc_data linkdir_wcc;
1932 * union LINK3res switch (nfsstat3 status) {
1936 * LINK3resfail resfail;
1939 static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1942 struct nfs3_linkres *result = data;
1943 enum nfs_stat status;
1946 error = decode_nfsstat3(xdr, &status);
1947 if (unlikely(error))
1949 error = decode_post_op_attr(xdr, result->fattr);
1950 if (unlikely(error))
1952 error = decode_wcc_data(xdr, result->dir_attr);
1953 if (unlikely(error))
1955 if (status != NFS3_OK)
1960 return nfs3_stat_to_errno(status);
1964 * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in
1965 * the local page cache
1966 * @xdr: XDR stream where entry resides
1967 * @entry: buffer to fill in with entry data
1968 * @plus: boolean indicating whether this should be a readdirplus entry
1970 * Returns zero if successful, otherwise a negative errno value is
1973 * This function is not invoked during READDIR reply decoding, but
1974 * rather whenever an application invokes the getdents(2) system call
1975 * on a directory already in our cache.
1983 * fhandle3 filehandle;
1984 * post_op_attr3 attributes;
1985 * entry3 *nextentry;
1989 * struct entryplus3 {
1993 * post_op_attr name_attributes;
1994 * post_op_fh3 name_handle;
1995 * entryplus3 *nextentry;
1998 int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
2001 struct nfs_entry old = *entry;
2006 p = xdr_inline_decode(xdr, 4);
2007 if (unlikely(p == NULL))
2009 if (*p == xdr_zero) {
2010 p = xdr_inline_decode(xdr, 4);
2011 if (unlikely(p == NULL))
2019 error = decode_fileid3(xdr, &entry->ino);
2020 if (unlikely(error))
2023 error = decode_inline_filename3(xdr, &entry->name, &entry->len);
2024 if (unlikely(error))
2027 error = decode_cookie3(xdr, &new_cookie);
2028 if (unlikely(error))
2031 entry->d_type = DT_UNKNOWN;
2034 entry->fattr->valid = 0;
2035 error = decode_post_op_attr(xdr, entry->fattr);
2036 if (unlikely(error))
2038 if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
2039 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
2041 if (entry->fattr->fileid != entry->ino) {
2042 entry->fattr->mounted_on_fileid = entry->ino;
2043 entry->fattr->valid |= NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
2046 /* In fact, a post_op_fh3: */
2047 p = xdr_inline_decode(xdr, 4);
2048 if (unlikely(p == NULL))
2050 if (*p != xdr_zero) {
2051 error = decode_nfs_fh3(xdr, entry->fh);
2052 if (unlikely(error)) {
2053 if (error == -E2BIG)
2058 zero_nfs_fh3(entry->fh);
2061 entry->prev_cookie = entry->cookie;
2062 entry->cookie = new_cookie;
2067 print_overflow_msg(__func__, xdr);
2070 dprintk("NFS: directory entry contains invalid file handle\n");
2076 * 3.3.16 READDIR3res
2083 * struct READDIR3resok {
2084 * post_op_attr dir_attributes;
2085 * cookieverf3 cookieverf;
2089 * struct READDIR3resfail {
2090 * post_op_attr dir_attributes;
2093 * union READDIR3res switch (nfsstat3 status) {
2095 * READDIR3resok resok;
2097 * READDIR3resfail resfail;
2100 * Read the directory contents into the page cache, but otherwise
2101 * don't touch them. The actual decoding is done by nfs3_decode_entry()
2102 * during subsequent nfs_readdir() calls.
2104 static int decode_dirlist3(struct xdr_stream *xdr)
2106 return xdr_read_pages(xdr, xdr->buf->page_len);
2109 static int decode_readdir3resok(struct xdr_stream *xdr,
2110 struct nfs3_readdirres *result)
2114 error = decode_post_op_attr(xdr, result->dir_attr);
2115 if (unlikely(error))
2117 /* XXX: do we need to check if result->verf != NULL ? */
2118 error = decode_cookieverf3(xdr, result->verf);
2119 if (unlikely(error))
2121 error = decode_dirlist3(xdr);
2126 static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req,
2127 struct xdr_stream *xdr,
2130 struct nfs3_readdirres *result = data;
2131 enum nfs_stat status;
2134 error = decode_nfsstat3(xdr, &status);
2135 if (unlikely(error))
2137 if (status != NFS3_OK)
2139 error = decode_readdir3resok(xdr, result);
2143 error = decode_post_op_attr(xdr, result->dir_attr);
2144 if (unlikely(error))
2146 return nfs3_stat_to_errno(status);
2152 * struct FSSTAT3resok {
2153 * post_op_attr obj_attributes;
2163 * struct FSSTAT3resfail {
2164 * post_op_attr obj_attributes;
2167 * union FSSTAT3res switch (nfsstat3 status) {
2169 * FSSTAT3resok resok;
2171 * FSSTAT3resfail resfail;
2174 static int decode_fsstat3resok(struct xdr_stream *xdr,
2175 struct nfs_fsstat *result)
2179 p = xdr_inline_decode(xdr, 8 * 6 + 4);
2180 if (unlikely(p == NULL))
2182 p = xdr_decode_size3(p, &result->tbytes);
2183 p = xdr_decode_size3(p, &result->fbytes);
2184 p = xdr_decode_size3(p, &result->abytes);
2185 p = xdr_decode_size3(p, &result->tfiles);
2186 p = xdr_decode_size3(p, &result->ffiles);
2187 xdr_decode_size3(p, &result->afiles);
2188 /* ignore invarsec */
2191 print_overflow_msg(__func__, xdr);
2195 static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
2196 struct xdr_stream *xdr,
2199 struct nfs_fsstat *result = data;
2200 enum nfs_stat status;
2203 error = decode_nfsstat3(xdr, &status);
2204 if (unlikely(error))
2206 error = decode_post_op_attr(xdr, result->fattr);
2207 if (unlikely(error))
2209 if (status != NFS3_OK)
2211 error = decode_fsstat3resok(xdr, result);
2215 return nfs3_stat_to_errno(status);
2221 * struct FSINFO3resok {
2222 * post_op_attr obj_attributes;
2230 * size3 maxfilesize;
2231 * nfstime3 time_delta;
2232 * uint32 properties;
2235 * struct FSINFO3resfail {
2236 * post_op_attr obj_attributes;
2239 * union FSINFO3res switch (nfsstat3 status) {
2241 * FSINFO3resok resok;
2243 * FSINFO3resfail resfail;
2246 static int decode_fsinfo3resok(struct xdr_stream *xdr,
2247 struct nfs_fsinfo *result)
2251 p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4);
2252 if (unlikely(p == NULL))
2254 result->rtmax = be32_to_cpup(p++);
2255 result->rtpref = be32_to_cpup(p++);
2256 result->rtmult = be32_to_cpup(p++);
2257 result->wtmax = be32_to_cpup(p++);
2258 result->wtpref = be32_to_cpup(p++);
2259 result->wtmult = be32_to_cpup(p++);
2260 result->dtpref = be32_to_cpup(p++);
2261 p = xdr_decode_size3(p, &result->maxfilesize);
2262 xdr_decode_nfstime3(p, &result->time_delta);
2264 /* ignore properties */
2265 result->lease_time = 0;
2268 print_overflow_msg(__func__, xdr);
2272 static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
2273 struct xdr_stream *xdr,
2276 struct nfs_fsinfo *result = data;
2277 enum nfs_stat status;
2280 error = decode_nfsstat3(xdr, &status);
2281 if (unlikely(error))
2283 error = decode_post_op_attr(xdr, result->fattr);
2284 if (unlikely(error))
2286 if (status != NFS3_OK)
2288 error = decode_fsinfo3resok(xdr, result);
2292 return nfs3_stat_to_errno(status);
2296 * 3.3.20 PATHCONF3res
2298 * struct PATHCONF3resok {
2299 * post_op_attr obj_attributes;
2303 * bool chown_restricted;
2304 * bool case_insensitive;
2305 * bool case_preserving;
2308 * struct PATHCONF3resfail {
2309 * post_op_attr obj_attributes;
2312 * union PATHCONF3res switch (nfsstat3 status) {
2314 * PATHCONF3resok resok;
2316 * PATHCONF3resfail resfail;
2319 static int decode_pathconf3resok(struct xdr_stream *xdr,
2320 struct nfs_pathconf *result)
2324 p = xdr_inline_decode(xdr, 4 * 6);
2325 if (unlikely(p == NULL))
2327 result->max_link = be32_to_cpup(p++);
2328 result->max_namelen = be32_to_cpup(p);
2329 /* ignore remaining fields */
2332 print_overflow_msg(__func__, xdr);
2336 static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
2337 struct xdr_stream *xdr,
2340 struct nfs_pathconf *result = data;
2341 enum nfs_stat status;
2344 error = decode_nfsstat3(xdr, &status);
2345 if (unlikely(error))
2347 error = decode_post_op_attr(xdr, result->fattr);
2348 if (unlikely(error))
2350 if (status != NFS3_OK)
2352 error = decode_pathconf3resok(xdr, result);
2356 return nfs3_stat_to_errno(status);
2362 * struct COMMIT3resok {
2363 * wcc_data file_wcc;
2367 * struct COMMIT3resfail {
2368 * wcc_data file_wcc;
2371 * union COMMIT3res switch (nfsstat3 status) {
2373 * COMMIT3resok resok;
2375 * COMMIT3resfail resfail;
2378 static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
2379 struct xdr_stream *xdr,
2382 struct nfs_commitres *result = data;
2383 enum nfs_stat status;
2386 error = decode_nfsstat3(xdr, &status);
2387 if (unlikely(error))
2389 error = decode_wcc_data(xdr, result->fattr);
2390 if (unlikely(error))
2392 result->op_status = status;
2393 if (status != NFS3_OK)
2395 error = decode_writeverf3(xdr, &result->verf->verifier);
2399 return nfs3_stat_to_errno(status);
2402 #ifdef CONFIG_NFS_V3_ACL
2404 static inline int decode_getacl3resok(struct xdr_stream *xdr,
2405 struct nfs3_getaclres *result)
2407 struct posix_acl **acl;
2408 unsigned int *aclcnt;
2412 error = decode_post_op_attr(xdr, result->fattr);
2413 if (unlikely(error))
2415 error = decode_uint32(xdr, &result->mask);
2416 if (unlikely(error))
2419 if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
2422 hdrlen = xdr_stream_pos(xdr);
2425 if (result->mask & NFS_ACL)
2426 acl = &result->acl_access;
2428 if (result->mask & NFS_ACLCNT)
2429 aclcnt = &result->acl_access_count;
2430 error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl);
2431 if (unlikely(error <= 0))
2435 if (result->mask & NFS_DFACL)
2436 acl = &result->acl_default;
2438 if (result->mask & NFS_DFACLCNT)
2439 aclcnt = &result->acl_default_count;
2440 error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl);
2441 if (unlikely(error <= 0))
2448 static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req,
2449 struct xdr_stream *xdr,
2452 enum nfs_stat status;
2455 error = decode_nfsstat3(xdr, &status);
2456 if (unlikely(error))
2458 if (status != NFS3_OK)
2460 error = decode_getacl3resok(xdr, result);
2464 return nfs3_stat_to_errno(status);
2467 static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
2468 struct xdr_stream *xdr,
2471 enum nfs_stat status;
2474 error = decode_nfsstat3(xdr, &status);
2475 if (unlikely(error))
2477 if (status != NFS3_OK)
2479 error = decode_post_op_attr(xdr, result);
2483 return nfs3_stat_to_errno(status);
2486 #endif /* CONFIG_NFS_V3_ACL */
2490 * We need to translate between nfs status return values and
2491 * the local errno values which may not be the same.
2493 static const struct {
2498 { NFSERR_PERM, -EPERM },
2499 { NFSERR_NOENT, -ENOENT },
2500 { NFSERR_IO, -errno_NFSERR_IO},
2501 { NFSERR_NXIO, -ENXIO },
2502 /* { NFSERR_EAGAIN, -EAGAIN }, */
2503 { NFSERR_ACCES, -EACCES },
2504 { NFSERR_EXIST, -EEXIST },
2505 { NFSERR_XDEV, -EXDEV },
2506 { NFSERR_NODEV, -ENODEV },
2507 { NFSERR_NOTDIR, -ENOTDIR },
2508 { NFSERR_ISDIR, -EISDIR },
2509 { NFSERR_INVAL, -EINVAL },
2510 { NFSERR_FBIG, -EFBIG },
2511 { NFSERR_NOSPC, -ENOSPC },
2512 { NFSERR_ROFS, -EROFS },
2513 { NFSERR_MLINK, -EMLINK },
2514 { NFSERR_NAMETOOLONG, -ENAMETOOLONG },
2515 { NFSERR_NOTEMPTY, -ENOTEMPTY },
2516 { NFSERR_DQUOT, -EDQUOT },
2517 { NFSERR_STALE, -ESTALE },
2518 { NFSERR_REMOTE, -EREMOTE },
2520 { NFSERR_WFLUSH, -EWFLUSH },
2522 { NFSERR_BADHANDLE, -EBADHANDLE },
2523 { NFSERR_NOT_SYNC, -ENOTSYNC },
2524 { NFSERR_BAD_COOKIE, -EBADCOOKIE },
2525 { NFSERR_NOTSUPP, -ENOTSUPP },
2526 { NFSERR_TOOSMALL, -ETOOSMALL },
2527 { NFSERR_SERVERFAULT, -EREMOTEIO },
2528 { NFSERR_BADTYPE, -EBADTYPE },
2529 { NFSERR_JUKEBOX, -EJUKEBOX },
2534 * nfs3_stat_to_errno - convert an NFS status code to a local errno
2535 * @status: NFS status code to convert
2537 * Returns a local errno value, or -EIO if the NFS status code is
2538 * not recognized. This function is used jointly by NFSv2 and NFSv3.
2540 static int nfs3_stat_to_errno(enum nfs_stat status)
2544 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
2545 if (nfs_errtbl[i].stat == (int)status)
2546 return nfs_errtbl[i].errno;
2548 dprintk("NFS: Unrecognized nfs status value: %u\n", status);
2549 return nfs_errtbl[i].errno;
2553 #define PROC(proc, argtype, restype, timer) \
2554 [NFS3PROC_##proc] = { \
2555 .p_proc = NFS3PROC_##proc, \
2556 .p_encode = nfs3_xdr_enc_##argtype##3args, \
2557 .p_decode = nfs3_xdr_dec_##restype##3res, \
2558 .p_arglen = NFS3_##argtype##args_sz, \
2559 .p_replen = NFS3_##restype##res_sz, \
2561 .p_statidx = NFS3PROC_##proc, \
2565 const struct rpc_procinfo nfs3_procedures[] = {
2566 PROC(GETATTR, getattr, getattr, 1),
2567 PROC(SETATTR, setattr, setattr, 0),
2568 PROC(LOOKUP, lookup, lookup, 2),
2569 PROC(ACCESS, access, access, 1),
2570 PROC(READLINK, readlink, readlink, 3),
2571 PROC(READ, read, read, 3),
2572 PROC(WRITE, write, write, 4),
2573 PROC(CREATE, create, create, 0),
2574 PROC(MKDIR, mkdir, create, 0),
2575 PROC(SYMLINK, symlink, create, 0),
2576 PROC(MKNOD, mknod, create, 0),
2577 PROC(REMOVE, remove, remove, 0),
2578 PROC(RMDIR, lookup, setattr, 0),
2579 PROC(RENAME, rename, rename, 0),
2580 PROC(LINK, link, link, 0),
2581 PROC(READDIR, readdir, readdir, 3),
2582 PROC(READDIRPLUS, readdirplus, readdir, 3),
2583 PROC(FSSTAT, getattr, fsstat, 0),
2584 PROC(FSINFO, getattr, fsinfo, 0),
2585 PROC(PATHCONF, getattr, pathconf, 0),
2586 PROC(COMMIT, commit, commit, 5),
2589 static unsigned int nfs_version3_counts[ARRAY_SIZE(nfs3_procedures)];
2590 const struct rpc_version nfs_version3 = {
2592 .nrprocs = ARRAY_SIZE(nfs3_procedures),
2593 .procs = nfs3_procedures,
2594 .counts = nfs_version3_counts,
2597 #ifdef CONFIG_NFS_V3_ACL
2598 static const struct rpc_procinfo nfs3_acl_procedures[] = {
2599 [ACLPROC3_GETACL] = {
2600 .p_proc = ACLPROC3_GETACL,
2601 .p_encode = nfs3_xdr_enc_getacl3args,
2602 .p_decode = nfs3_xdr_dec_getacl3res,
2603 .p_arglen = ACL3_getaclargs_sz,
2604 .p_replen = ACL3_getaclres_sz,
2608 [ACLPROC3_SETACL] = {
2609 .p_proc = ACLPROC3_SETACL,
2610 .p_encode = nfs3_xdr_enc_setacl3args,
2611 .p_decode = nfs3_xdr_dec_setacl3res,
2612 .p_arglen = ACL3_setaclargs_sz,
2613 .p_replen = ACL3_setaclres_sz,
2619 static unsigned int nfs3_acl_counts[ARRAY_SIZE(nfs3_acl_procedures)];
2620 const struct rpc_version nfsacl_version3 = {
2622 .nrprocs = ARRAY_SIZE(nfs3_acl_procedures),
2623 .procs = nfs3_acl_procedures,
2624 .counts = nfs3_acl_counts,
2626 #endif /* CONFIG_NFS_V3_ACL */