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>
27 #define NFSDBG_FACILITY NFSDBG_XDR
29 /* Mapping from NFS error code to "errno" error code. */
30 #define errno_NFSERR_IO EIO
33 * Declare the space requirements for NFS arguments and replies as
34 * number of 32bit-words
36 #define NFS3_pagepad_sz (1) /* Page padding */
37 #define NFS3_fhandle_sz (1+16)
38 #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
39 #define NFS3_post_op_fh_sz (1+NFS3_fh_sz)
40 #define NFS3_sattr_sz (15)
41 #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
42 #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
43 #define NFS3_fattr_sz (21)
44 #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2)
45 #define NFS3_wcc_attr_sz (6)
46 #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
47 #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
48 #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
49 #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
51 #define NFS3_getattrargs_sz (NFS3_fh_sz)
52 #define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
53 #define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz)
54 #define NFS3_accessargs_sz (NFS3_fh_sz+1)
55 #define NFS3_readlinkargs_sz (NFS3_fh_sz)
56 #define NFS3_readargs_sz (NFS3_fh_sz+3)
57 #define NFS3_writeargs_sz (NFS3_fh_sz+5)
58 #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
59 #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
60 #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
61 #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
62 #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
63 #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
64 #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
65 #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3)
66 #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4)
67 #define NFS3_commitargs_sz (NFS3_fh_sz+3)
69 #define NFS3_getattrres_sz (1+NFS3_fattr_sz)
70 #define NFS3_setattrres_sz (1+NFS3_wcc_data_sz)
71 #define NFS3_removeres_sz (NFS3_setattrres_sz)
72 #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
73 #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
74 #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1+NFS3_pagepad_sz)
75 #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3+NFS3_pagepad_sz)
76 #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
77 #define NFS3_createres_sz (1+NFS3_post_op_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
78 #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz))
79 #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
80 #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2+NFS3_pagepad_sz)
81 #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13)
82 #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12)
83 #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6)
84 #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
86 #define ACL3_getaclargs_sz (NFS3_fh_sz+1)
87 #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \
88 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
89 #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \
90 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)+\
92 #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
94 static int nfs3_stat_to_errno(enum nfs_stat);
97 * Map file type to S_IFMT bits
99 static const umode_t nfs_type2fmt[] = {
106 [NF3SOCK] = S_IFSOCK,
110 static struct user_namespace *rpc_userns(const struct rpc_clnt *clnt)
112 if (clnt && clnt->cl_cred)
113 return clnt->cl_cred->user_ns;
114 return &init_user_ns;
117 static struct user_namespace *rpc_rqst_userns(const struct rpc_rqst *rqstp)
120 return rpc_userns(rqstp->rq_task->tk_client);
121 return &init_user_ns;
125 * Encode/decode NFSv3 basic data types
127 * Basic NFSv3 data types are defined in section 2.5 of RFC 1813:
128 * "NFS Version 3 Protocol Specification".
130 * Not all basic data types have their own encoding and decoding
131 * functions. For run-time efficiency, some data types are encoded
135 static void encode_uint32(struct xdr_stream *xdr, u32 value)
137 __be32 *p = xdr_reserve_space(xdr, 4);
138 *p = cpu_to_be32(value);
141 static int decode_uint32(struct xdr_stream *xdr, u32 *value)
145 p = xdr_inline_decode(xdr, 4);
148 *value = be32_to_cpup(p);
152 static int decode_uint64(struct xdr_stream *xdr, u64 *value)
156 p = xdr_inline_decode(xdr, 8);
159 xdr_decode_hyper(p, value);
166 * typedef uint64 fileid3;
168 static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid)
170 return xdr_decode_hyper(p, fileid);
173 static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid)
175 return decode_uint64(xdr, fileid);
181 * typedef string filename3<>;
183 static void encode_filename3(struct xdr_stream *xdr,
184 const char *name, u32 length)
188 WARN_ON_ONCE(length > NFS3_MAXNAMLEN);
189 p = xdr_reserve_space(xdr, 4 + length);
190 xdr_encode_opaque(p, name, length);
193 static int decode_inline_filename3(struct xdr_stream *xdr,
194 const char **name, u32 *length)
199 p = xdr_inline_decode(xdr, 4);
202 count = be32_to_cpup(p);
203 if (count > NFS3_MAXNAMLEN)
204 goto out_nametoolong;
205 p = xdr_inline_decode(xdr, count);
208 *name = (const char *)p;
213 dprintk("NFS: returned filename too long: %u\n", count);
214 return -ENAMETOOLONG;
220 * typedef string nfspath3<>;
222 static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages,
225 encode_uint32(xdr, length);
226 xdr_write_pages(xdr, pages, 0, length);
229 static int decode_nfspath3(struct xdr_stream *xdr)
234 p = xdr_inline_decode(xdr, 4);
237 count = be32_to_cpup(p);
238 if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN))
239 goto out_nametoolong;
240 recvd = xdr_read_pages(xdr, count);
241 if (unlikely(count > recvd))
243 xdr_terminate_string(xdr->buf, count);
247 dprintk("NFS: returned pathname too long: %u\n", count);
248 return -ENAMETOOLONG;
250 dprintk("NFS: server cheating in pathname result: "
251 "count %u > recvd %u\n", count, recvd);
258 * typedef uint64 cookie3
260 static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie)
262 return xdr_encode_hyper(p, cookie);
265 static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie)
267 return decode_uint64(xdr, cookie);
273 * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE];
275 static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier)
277 memcpy(p, verifier, NFS3_COOKIEVERFSIZE);
278 return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE);
281 static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier)
285 p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
288 memcpy(verifier, p, NFS3_COOKIEVERFSIZE);
295 * typedef opaque createverf3[NFS3_CREATEVERFSIZE];
297 static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier)
301 p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE);
302 memcpy(p, verifier, NFS3_CREATEVERFSIZE);
305 static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *verifier)
309 p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE);
312 memcpy(verifier->data, p, NFS3_WRITEVERFSIZE);
319 * typedef uint64 size3;
321 static __be32 *xdr_decode_size3(__be32 *p, u64 *size)
323 return xdr_decode_hyper(p, size);
334 #define NFS3_OK NFS_OK
336 static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
340 p = xdr_inline_decode(xdr, 4);
343 if (unlikely(*p != cpu_to_be32(NFS3_OK)))
348 *status = be32_to_cpup(p);
349 trace_nfs_xdr_status(xdr, (int)*status);
366 static void encode_ftype3(struct xdr_stream *xdr, const u32 type)
368 encode_uint32(xdr, type);
371 static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode)
375 type = be32_to_cpup(p++);
378 *mode = nfs_type2fmt[type];
390 static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev)
394 p = xdr_reserve_space(xdr, 8);
395 *p++ = cpu_to_be32(MAJOR(rdev));
396 *p = cpu_to_be32(MINOR(rdev));
399 static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev)
401 unsigned int major, minor;
403 major = be32_to_cpup(p++);
404 minor = be32_to_cpup(p++);
405 *rdev = MKDEV(major, minor);
406 if (MAJOR(*rdev) != major || MINOR(*rdev) != minor)
415 * opaque data<NFS3_FHSIZE>;
418 static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh)
422 WARN_ON_ONCE(fh->size > NFS3_FHSIZE);
423 p = xdr_reserve_space(xdr, 4 + fh->size);
424 xdr_encode_opaque(p, fh->data, fh->size);
427 static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
432 p = xdr_inline_decode(xdr, 4);
435 length = be32_to_cpup(p++);
436 if (unlikely(length > NFS3_FHSIZE || length == 0))
438 p = xdr_inline_decode(xdr, length);
442 memcpy(fh->data, p, length);
445 trace_nfs_xdr_bad_filehandle(xdr, NFSERR_BADHANDLE);
449 static void zero_nfs_fh3(struct nfs_fh *fh)
451 memset(fh, 0, sizeof(*fh));
462 static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec64 *timep)
464 *p++ = cpu_to_be32((u32)timep->tv_sec);
465 *p++ = cpu_to_be32(timep->tv_nsec);
469 static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec64 *timep)
471 timep->tv_sec = be32_to_cpup(p++);
472 timep->tv_nsec = be32_to_cpup(p++);
481 * SET_TO_SERVER_TIME = 1,
482 * SET_TO_CLIENT_TIME = 2
485 * union set_mode3 switch (bool set_it) {
492 * union set_uid3 switch (bool set_it) {
499 * union set_gid3 switch (bool set_it) {
506 * union set_size3 switch (bool set_it) {
513 * union set_atime switch (time_how set_it) {
514 * case SET_TO_CLIENT_TIME:
520 * union set_mtime switch (time_how set_it) {
521 * case SET_TO_CLIENT_TIME:
536 static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr,
537 struct user_namespace *userns)
543 * In order to make only a single xdr_reserve_space() call,
544 * pre-compute the total number of bytes to be reserved.
545 * Six boolean values, one for each set_foo field, are always
546 * present in the encoded result, so start there.
549 if (attr->ia_valid & ATTR_MODE)
551 if (attr->ia_valid & ATTR_UID)
553 if (attr->ia_valid & ATTR_GID)
555 if (attr->ia_valid & ATTR_SIZE)
557 if (attr->ia_valid & ATTR_ATIME_SET)
559 if (attr->ia_valid & ATTR_MTIME_SET)
561 p = xdr_reserve_space(xdr, nbytes);
563 if (attr->ia_valid & ATTR_MODE) {
565 *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO);
569 if (attr->ia_valid & ATTR_UID) {
571 *p++ = cpu_to_be32(from_kuid_munged(userns, attr->ia_uid));
575 if (attr->ia_valid & ATTR_GID) {
577 *p++ = cpu_to_be32(from_kgid_munged(userns, attr->ia_gid));
581 if (attr->ia_valid & ATTR_SIZE) {
583 p = xdr_encode_hyper(p, (u64)attr->ia_size);
587 if (attr->ia_valid & ATTR_ATIME_SET) {
589 p = xdr_encode_nfstime3(p, &attr->ia_atime);
590 } else if (attr->ia_valid & ATTR_ATIME) {
595 if (attr->ia_valid & ATTR_MTIME_SET) {
597 xdr_encode_nfstime3(p, &attr->ia_mtime);
598 } else if (attr->ia_valid & ATTR_MTIME) {
623 static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr,
624 struct user_namespace *userns)
629 p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2);
633 p = xdr_decode_ftype3(p, &fmode);
635 fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode;
636 fattr->nlink = be32_to_cpup(p++);
637 fattr->uid = make_kuid(userns, be32_to_cpup(p++));
638 if (!uid_valid(fattr->uid))
640 fattr->gid = make_kgid(userns, be32_to_cpup(p++));
641 if (!gid_valid(fattr->gid))
644 p = xdr_decode_size3(p, &fattr->size);
645 p = xdr_decode_size3(p, &fattr->du.nfs3.used);
646 p = xdr_decode_specdata3(p, &fattr->rdev);
648 p = xdr_decode_hyper(p, &fattr->fsid.major);
649 fattr->fsid.minor = 0;
651 p = xdr_decode_fileid3(p, &fattr->fileid);
652 p = xdr_decode_nfstime3(p, &fattr->atime);
653 p = xdr_decode_nfstime3(p, &fattr->mtime);
654 xdr_decode_nfstime3(p, &fattr->ctime);
655 fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime);
657 fattr->valid |= NFS_ATTR_FATTR_V3;
660 dprintk("NFS: returned invalid uid\n");
663 dprintk("NFS: returned invalid gid\n");
670 * union post_op_attr switch (bool attributes_follow) {
677 static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
678 struct user_namespace *userns)
682 p = xdr_inline_decode(xdr, 4);
686 return decode_fattr3(xdr, fattr, userns);
698 static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
702 p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2);
706 fattr->valid |= NFS_ATTR_FATTR_PRESIZE
707 | NFS_ATTR_FATTR_PRECHANGE
708 | NFS_ATTR_FATTR_PREMTIME
709 | NFS_ATTR_FATTR_PRECTIME;
711 p = xdr_decode_size3(p, &fattr->pre_size);
712 p = xdr_decode_nfstime3(p, &fattr->pre_mtime);
713 xdr_decode_nfstime3(p, &fattr->pre_ctime);
714 fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime);
721 * union pre_op_attr switch (bool attributes_follow) {
723 * wcc_attr attributes;
731 * pre_op_attr before;
732 * post_op_attr after;
735 static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
739 p = xdr_inline_decode(xdr, 4);
743 return decode_wcc_attr(xdr, fattr);
747 static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr,
748 struct user_namespace *userns)
752 error = decode_pre_op_attr(xdr, fattr);
755 error = decode_post_op_attr(xdr, fattr, userns);
763 * union post_op_fh3 switch (bool handle_follows) {
770 static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
772 __be32 *p = xdr_inline_decode(xdr, 4);
776 return decode_nfs_fh3(xdr, fh);
784 * struct diropargs3 {
789 static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh,
790 const char *name, u32 length)
792 encode_nfs_fh3(xdr, fh);
793 encode_filename3(xdr, name, length);
798 * NFSv3 XDR encode functions
800 * NFSv3 argument types are defined in section 3.3 of RFC 1813:
801 * "NFS Version 3 Protocol Specification".
807 * struct GETATTR3args {
811 static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req,
812 struct xdr_stream *xdr,
815 const struct nfs_fh *fh = data;
817 encode_nfs_fh3(xdr, fh);
823 * union sattrguard3 switch (bool check) {
825 * nfstime3 obj_ctime;
830 * struct SETATTR3args {
832 * sattr3 new_attributes;
836 static void encode_sattrguard3(struct xdr_stream *xdr,
837 const struct nfs3_sattrargs *args)
842 p = xdr_reserve_space(xdr, 4 + 8);
844 xdr_encode_nfstime3(p, &args->guardtime);
846 p = xdr_reserve_space(xdr, 4);
851 static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req,
852 struct xdr_stream *xdr,
855 const struct nfs3_sattrargs *args = data;
856 encode_nfs_fh3(xdr, args->fh);
857 encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req));
858 encode_sattrguard3(xdr, args);
864 * struct LOOKUP3args {
868 static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req,
869 struct xdr_stream *xdr,
872 const struct nfs3_diropargs *args = data;
874 encode_diropargs3(xdr, args->fh, args->name, args->len);
880 * struct ACCESS3args {
885 static void encode_access3args(struct xdr_stream *xdr,
886 const struct nfs3_accessargs *args)
888 encode_nfs_fh3(xdr, args->fh);
889 encode_uint32(xdr, args->access);
892 static void nfs3_xdr_enc_access3args(struct rpc_rqst *req,
893 struct xdr_stream *xdr,
896 const struct nfs3_accessargs *args = data;
898 encode_access3args(xdr, args);
902 * 3.3.5 READLINK3args
904 * struct READLINK3args {
908 static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req,
909 struct xdr_stream *xdr,
912 const struct nfs3_readlinkargs *args = data;
914 encode_nfs_fh3(xdr, args->fh);
915 rpc_prepare_reply_pages(req, args->pages, args->pgbase, args->pglen,
916 NFS3_readlinkres_sz - NFS3_pagepad_sz);
928 static void encode_read3args(struct xdr_stream *xdr,
929 const struct nfs_pgio_args *args)
933 encode_nfs_fh3(xdr, args->fh);
935 p = xdr_reserve_space(xdr, 8 + 4);
936 p = xdr_encode_hyper(p, args->offset);
937 *p = cpu_to_be32(args->count);
940 static void nfs3_xdr_enc_read3args(struct rpc_rqst *req,
941 struct xdr_stream *xdr,
944 const struct nfs_pgio_args *args = data;
945 unsigned int replen = args->replen ? args->replen :
946 NFS3_readres_sz - NFS3_pagepad_sz;
948 encode_read3args(xdr, args);
949 rpc_prepare_reply_pages(req, args->pages, args->pgbase,
950 args->count, replen);
951 req->rq_rcv_buf.flags |= XDRBUF_READ;
963 * struct WRITE3args {
971 static void encode_write3args(struct xdr_stream *xdr,
972 const struct nfs_pgio_args *args)
976 encode_nfs_fh3(xdr, args->fh);
978 p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4);
979 p = xdr_encode_hyper(p, args->offset);
980 *p++ = cpu_to_be32(args->count);
981 *p++ = cpu_to_be32(args->stable);
982 *p = cpu_to_be32(args->count);
983 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
986 static void nfs3_xdr_enc_write3args(struct rpc_rqst *req,
987 struct xdr_stream *xdr,
990 const struct nfs_pgio_args *args = data;
992 encode_write3args(xdr, args);
993 xdr->buf->flags |= XDRBUF_WRITE;
1005 * union createhow3 switch (createmode3 mode) {
1008 * sattr3 obj_attributes;
1013 * struct CREATE3args {
1018 static void encode_createhow3(struct xdr_stream *xdr,
1019 const struct nfs3_createargs *args,
1020 struct user_namespace *userns)
1022 encode_uint32(xdr, args->createmode);
1023 switch (args->createmode) {
1024 case NFS3_CREATE_UNCHECKED:
1025 case NFS3_CREATE_GUARDED:
1026 encode_sattr3(xdr, args->sattr, userns);
1028 case NFS3_CREATE_EXCLUSIVE:
1029 encode_createverf3(xdr, args->verifier);
1036 static void nfs3_xdr_enc_create3args(struct rpc_rqst *req,
1037 struct xdr_stream *xdr,
1040 const struct nfs3_createargs *args = data;
1042 encode_diropargs3(xdr, args->fh, args->name, args->len);
1043 encode_createhow3(xdr, args, rpc_rqst_userns(req));
1049 * struct MKDIR3args {
1051 * sattr3 attributes;
1054 static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
1055 struct xdr_stream *xdr,
1058 const struct nfs3_mkdirargs *args = data;
1060 encode_diropargs3(xdr, args->fh, args->name, args->len);
1061 encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req));
1065 * 3.3.10 SYMLINK3args
1067 * struct symlinkdata3 {
1068 * sattr3 symlink_attributes;
1069 * nfspath3 symlink_data;
1072 * struct SYMLINK3args {
1074 * symlinkdata3 symlink;
1077 static void encode_symlinkdata3(struct xdr_stream *xdr,
1079 struct user_namespace *userns)
1081 const struct nfs3_symlinkargs *args = data;
1083 encode_sattr3(xdr, args->sattr, userns);
1084 encode_nfspath3(xdr, args->pages, args->pathlen);
1087 static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
1088 struct xdr_stream *xdr,
1091 const struct nfs3_symlinkargs *args = data;
1093 encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
1094 encode_symlinkdata3(xdr, args, rpc_rqst_userns(req));
1095 xdr->buf->flags |= XDRBUF_WRITE;
1101 * struct devicedata3 {
1102 * sattr3 dev_attributes;
1106 * union mknoddata3 switch (ftype3 type) {
1109 * devicedata3 device;
1112 * sattr3 pipe_attributes;
1117 * struct MKNOD3args {
1122 static void encode_devicedata3(struct xdr_stream *xdr,
1123 const struct nfs3_mknodargs *args,
1124 struct user_namespace *userns)
1126 encode_sattr3(xdr, args->sattr, userns);
1127 encode_specdata3(xdr, args->rdev);
1130 static void encode_mknoddata3(struct xdr_stream *xdr,
1131 const struct nfs3_mknodargs *args,
1132 struct user_namespace *userns)
1134 encode_ftype3(xdr, args->type);
1135 switch (args->type) {
1138 encode_devicedata3(xdr, args, userns);
1142 encode_sattr3(xdr, args->sattr, userns);
1152 static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req,
1153 struct xdr_stream *xdr,
1156 const struct nfs3_mknodargs *args = data;
1158 encode_diropargs3(xdr, args->fh, args->name, args->len);
1159 encode_mknoddata3(xdr, args, rpc_rqst_userns(req));
1163 * 3.3.12 REMOVE3args
1165 * struct REMOVE3args {
1166 * diropargs3 object;
1169 static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req,
1170 struct xdr_stream *xdr,
1173 const struct nfs_removeargs *args = data;
1175 encode_diropargs3(xdr, args->fh, args->name.name, args->name.len);
1179 * 3.3.14 RENAME3args
1181 * struct RENAME3args {
1186 static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req,
1187 struct xdr_stream *xdr,
1190 const struct nfs_renameargs *args = data;
1191 const struct qstr *old = args->old_name;
1192 const struct qstr *new = args->new_name;
1194 encode_diropargs3(xdr, args->old_dir, old->name, old->len);
1195 encode_diropargs3(xdr, args->new_dir, new->name, new->len);
1201 * struct LINK3args {
1206 static void nfs3_xdr_enc_link3args(struct rpc_rqst *req,
1207 struct xdr_stream *xdr,
1210 const struct nfs3_linkargs *args = data;
1212 encode_nfs_fh3(xdr, args->fromfh);
1213 encode_diropargs3(xdr, args->tofh, args->toname, args->tolen);
1217 * 3.3.16 READDIR3args
1219 * struct READDIR3args {
1222 * cookieverf3 cookieverf;
1226 static void encode_readdir3args(struct xdr_stream *xdr,
1227 const struct nfs3_readdirargs *args)
1231 encode_nfs_fh3(xdr, args->fh);
1233 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4);
1234 p = xdr_encode_cookie3(p, args->cookie);
1235 p = xdr_encode_cookieverf3(p, args->verf);
1236 *p = cpu_to_be32(args->count);
1239 static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req,
1240 struct xdr_stream *xdr,
1243 const struct nfs3_readdirargs *args = data;
1245 encode_readdir3args(xdr, args);
1246 rpc_prepare_reply_pages(req, args->pages, 0, args->count,
1247 NFS3_readdirres_sz - NFS3_pagepad_sz);
1251 * 3.3.17 READDIRPLUS3args
1253 * struct READDIRPLUS3args {
1256 * cookieverf3 cookieverf;
1261 static void encode_readdirplus3args(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 + 4);
1269 p = xdr_encode_cookie3(p, args->cookie);
1270 p = xdr_encode_cookieverf3(p, args->verf);
1273 * readdirplus: need dircount + buffer size.
1274 * We just make sure we make dircount big enough
1276 *p++ = cpu_to_be32(args->count >> 3);
1278 *p = cpu_to_be32(args->count);
1281 static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req,
1282 struct xdr_stream *xdr,
1285 const struct nfs3_readdirargs *args = data;
1287 encode_readdirplus3args(xdr, args);
1288 rpc_prepare_reply_pages(req, args->pages, 0, args->count,
1289 NFS3_readdirres_sz - NFS3_pagepad_sz);
1293 * 3.3.21 COMMIT3args
1295 * struct COMMIT3args {
1301 static void encode_commit3args(struct xdr_stream *xdr,
1302 const struct nfs_commitargs *args)
1306 encode_nfs_fh3(xdr, args->fh);
1308 p = xdr_reserve_space(xdr, 8 + 4);
1309 p = xdr_encode_hyper(p, args->offset);
1310 *p = cpu_to_be32(args->count);
1313 static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req,
1314 struct xdr_stream *xdr,
1317 const struct nfs_commitargs *args = data;
1319 encode_commit3args(xdr, args);
1322 #ifdef CONFIG_NFS_V3_ACL
1324 static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req,
1325 struct xdr_stream *xdr,
1328 const struct nfs3_getaclargs *args = data;
1330 encode_nfs_fh3(xdr, args->fh);
1331 encode_uint32(xdr, args->mask);
1332 if (args->mask & (NFS_ACL | NFS_DFACL)) {
1333 rpc_prepare_reply_pages(req, args->pages, 0,
1334 NFSACL_MAXPAGES << PAGE_SHIFT,
1335 ACL3_getaclres_sz - NFS3_pagepad_sz);
1336 req->rq_rcv_buf.flags |= XDRBUF_SPARSE_PAGES;
1340 static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req,
1341 struct xdr_stream *xdr,
1344 const struct nfs3_setaclargs *args = data;
1348 encode_nfs_fh3(xdr, NFS_FH(args->inode));
1349 encode_uint32(xdr, args->mask);
1351 base = req->rq_slen;
1352 if (args->npages != 0)
1353 xdr_write_pages(xdr, args->pages, 0, args->len);
1355 xdr_reserve_space(xdr, args->len);
1357 error = nfsacl_encode(xdr->buf, base, args->inode,
1358 (args->mask & NFS_ACL) ?
1359 args->acl_access : NULL, 1, 0);
1360 /* FIXME: this is just broken */
1362 error = nfsacl_encode(xdr->buf, base + error, args->inode,
1363 (args->mask & NFS_DFACL) ?
1364 args->acl_default : NULL, 1,
1369 #endif /* CONFIG_NFS_V3_ACL */
1372 * NFSv3 XDR decode functions
1374 * NFSv3 result types are defined in section 3.3 of RFC 1813:
1375 * "NFS Version 3 Protocol Specification".
1381 * struct GETATTR3resok {
1382 * fattr3 obj_attributes;
1385 * union GETATTR3res switch (nfsstat3 status) {
1387 * GETATTR3resok resok;
1392 static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req,
1393 struct xdr_stream *xdr,
1396 enum nfs_stat status;
1399 error = decode_nfsstat3(xdr, &status);
1400 if (unlikely(error))
1402 if (status != NFS3_OK)
1404 error = decode_fattr3(xdr, result, rpc_rqst_userns(req));
1408 return nfs3_stat_to_errno(status);
1414 * struct SETATTR3resok {
1418 * struct SETATTR3resfail {
1422 * union SETATTR3res switch (nfsstat3 status) {
1424 * SETATTR3resok resok;
1426 * SETATTR3resfail resfail;
1429 static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req,
1430 struct xdr_stream *xdr,
1433 enum nfs_stat status;
1436 error = decode_nfsstat3(xdr, &status);
1437 if (unlikely(error))
1439 error = decode_wcc_data(xdr, result, rpc_rqst_userns(req));
1440 if (unlikely(error))
1442 if (status != NFS3_OK)
1447 return nfs3_stat_to_errno(status);
1453 * struct LOOKUP3resok {
1455 * post_op_attr obj_attributes;
1456 * post_op_attr dir_attributes;
1459 * struct LOOKUP3resfail {
1460 * post_op_attr dir_attributes;
1463 * union LOOKUP3res switch (nfsstat3 status) {
1465 * LOOKUP3resok resok;
1467 * LOOKUP3resfail resfail;
1470 static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
1471 struct xdr_stream *xdr,
1474 struct user_namespace *userns = rpc_rqst_userns(req);
1475 struct nfs3_diropres *result = data;
1476 enum nfs_stat status;
1479 error = decode_nfsstat3(xdr, &status);
1480 if (unlikely(error))
1482 if (status != NFS3_OK)
1484 error = decode_nfs_fh3(xdr, result->fh);
1485 if (unlikely(error))
1487 error = decode_post_op_attr(xdr, result->fattr, userns);
1488 if (unlikely(error))
1490 error = decode_post_op_attr(xdr, result->dir_attr, userns);
1494 error = decode_post_op_attr(xdr, result->dir_attr, userns);
1495 if (unlikely(error))
1497 return nfs3_stat_to_errno(status);
1503 * struct ACCESS3resok {
1504 * post_op_attr obj_attributes;
1508 * struct ACCESS3resfail {
1509 * post_op_attr obj_attributes;
1512 * union ACCESS3res switch (nfsstat3 status) {
1514 * ACCESS3resok resok;
1516 * ACCESS3resfail resfail;
1519 static int nfs3_xdr_dec_access3res(struct rpc_rqst *req,
1520 struct xdr_stream *xdr,
1523 struct nfs3_accessres *result = data;
1524 enum nfs_stat status;
1527 error = decode_nfsstat3(xdr, &status);
1528 if (unlikely(error))
1530 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
1531 if (unlikely(error))
1533 if (status != NFS3_OK)
1535 error = decode_uint32(xdr, &result->access);
1539 return nfs3_stat_to_errno(status);
1543 * 3.3.5 READLINK3res
1545 * struct READLINK3resok {
1546 * post_op_attr symlink_attributes;
1550 * struct READLINK3resfail {
1551 * post_op_attr symlink_attributes;
1554 * union READLINK3res switch (nfsstat3 status) {
1556 * READLINK3resok resok;
1558 * READLINK3resfail resfail;
1561 static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req,
1562 struct xdr_stream *xdr,
1565 enum nfs_stat status;
1568 error = decode_nfsstat3(xdr, &status);
1569 if (unlikely(error))
1571 error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req));
1572 if (unlikely(error))
1574 if (status != NFS3_OK)
1576 error = decode_nfspath3(xdr);
1580 return nfs3_stat_to_errno(status);
1586 * struct READ3resok {
1587 * post_op_attr file_attributes;
1593 * struct READ3resfail {
1594 * post_op_attr file_attributes;
1597 * union READ3res switch (nfsstat3 status) {
1601 * READ3resfail resfail;
1604 static int decode_read3resok(struct xdr_stream *xdr,
1605 struct nfs_pgio_res *result)
1607 u32 eof, count, ocount, recvd;
1610 p = xdr_inline_decode(xdr, 4 + 4 + 4);
1613 count = be32_to_cpup(p++);
1614 eof = be32_to_cpup(p++);
1615 ocount = be32_to_cpup(p++);
1616 if (unlikely(ocount != count))
1618 recvd = xdr_read_pages(xdr, count);
1619 if (unlikely(count > recvd))
1623 result->count = count;
1626 dprintk("NFS: READ count doesn't match length of opaque: "
1627 "count %u != ocount %u\n", count, ocount);
1630 dprintk("NFS: server cheating in read result: "
1631 "count %u > recvd %u\n", count, recvd);
1637 static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1640 struct nfs_pgio_res *result = data;
1642 enum nfs_stat status;
1645 pos = xdr_stream_pos(xdr);
1646 error = decode_nfsstat3(xdr, &status);
1647 if (unlikely(error))
1649 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
1650 if (unlikely(error))
1652 result->op_status = status;
1653 if (status != NFS3_OK)
1655 result->replen = 3 + ((xdr_stream_pos(xdr) - pos) >> 2);
1656 error = decode_read3resok(xdr, result);
1660 return nfs3_stat_to_errno(status);
1672 * struct WRITE3resok {
1673 * wcc_data file_wcc;
1675 * stable_how committed;
1679 * struct WRITE3resfail {
1680 * wcc_data file_wcc;
1683 * union WRITE3res switch (nfsstat3 status) {
1685 * WRITE3resok resok;
1687 * WRITE3resfail resfail;
1690 static int decode_write3resok(struct xdr_stream *xdr,
1691 struct nfs_pgio_res *result)
1695 p = xdr_inline_decode(xdr, 4 + 4);
1698 result->count = be32_to_cpup(p++);
1699 result->verf->committed = be32_to_cpup(p++);
1700 if (unlikely(result->verf->committed > NFS_FILE_SYNC))
1702 if (decode_writeverf3(xdr, &result->verf->verifier))
1704 return result->count;
1706 dprintk("NFS: bad stable_how value: %u\n", result->verf->committed);
1710 static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1713 struct nfs_pgio_res *result = data;
1714 enum nfs_stat status;
1717 error = decode_nfsstat3(xdr, &status);
1718 if (unlikely(error))
1720 error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req));
1721 if (unlikely(error))
1723 result->op_status = status;
1724 if (status != NFS3_OK)
1726 error = decode_write3resok(xdr, result);
1730 return nfs3_stat_to_errno(status);
1736 * struct CREATE3resok {
1738 * post_op_attr obj_attributes;
1742 * struct CREATE3resfail {
1746 * union CREATE3res switch (nfsstat3 status) {
1748 * CREATE3resok resok;
1750 * CREATE3resfail resfail;
1753 static int decode_create3resok(struct xdr_stream *xdr,
1754 struct nfs3_diropres *result,
1755 struct user_namespace *userns)
1759 error = decode_post_op_fh3(xdr, result->fh);
1760 if (unlikely(error))
1762 error = decode_post_op_attr(xdr, result->fattr, userns);
1763 if (unlikely(error))
1765 /* The server isn't required to return a file handle.
1766 * If it didn't, force the client to perform a LOOKUP
1767 * to determine the correct file handle and attribute
1768 * values for the new object. */
1769 if (result->fh->size == 0)
1770 result->fattr->valid = 0;
1771 error = decode_wcc_data(xdr, result->dir_attr, userns);
1776 static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
1777 struct xdr_stream *xdr,
1780 struct user_namespace *userns = rpc_rqst_userns(req);
1781 struct nfs3_diropres *result = data;
1782 enum nfs_stat status;
1785 error = decode_nfsstat3(xdr, &status);
1786 if (unlikely(error))
1788 if (status != NFS3_OK)
1790 error = decode_create3resok(xdr, result, userns);
1794 error = decode_wcc_data(xdr, result->dir_attr, userns);
1795 if (unlikely(error))
1797 return nfs3_stat_to_errno(status);
1803 * struct REMOVE3resok {
1807 * struct REMOVE3resfail {
1811 * union REMOVE3res switch (nfsstat3 status) {
1813 * REMOVE3resok resok;
1815 * REMOVE3resfail resfail;
1818 static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
1819 struct xdr_stream *xdr,
1822 struct nfs_removeres *result = data;
1823 enum nfs_stat status;
1826 error = decode_nfsstat3(xdr, &status);
1827 if (unlikely(error))
1829 error = decode_wcc_data(xdr, result->dir_attr, rpc_rqst_userns(req));
1830 if (unlikely(error))
1832 if (status != NFS3_OK)
1837 return nfs3_stat_to_errno(status);
1843 * struct RENAME3resok {
1844 * wcc_data fromdir_wcc;
1845 * wcc_data todir_wcc;
1848 * struct RENAME3resfail {
1849 * wcc_data fromdir_wcc;
1850 * wcc_data todir_wcc;
1853 * union RENAME3res switch (nfsstat3 status) {
1855 * RENAME3resok resok;
1857 * RENAME3resfail resfail;
1860 static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
1861 struct xdr_stream *xdr,
1864 struct user_namespace *userns = rpc_rqst_userns(req);
1865 struct nfs_renameres *result = data;
1866 enum nfs_stat status;
1869 error = decode_nfsstat3(xdr, &status);
1870 if (unlikely(error))
1872 error = decode_wcc_data(xdr, result->old_fattr, userns);
1873 if (unlikely(error))
1875 error = decode_wcc_data(xdr, result->new_fattr, userns);
1876 if (unlikely(error))
1878 if (status != NFS3_OK)
1883 return nfs3_stat_to_errno(status);
1889 * struct LINK3resok {
1890 * post_op_attr file_attributes;
1891 * wcc_data linkdir_wcc;
1894 * struct LINK3resfail {
1895 * post_op_attr file_attributes;
1896 * wcc_data linkdir_wcc;
1899 * union LINK3res switch (nfsstat3 status) {
1903 * LINK3resfail resfail;
1906 static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
1909 struct user_namespace *userns = rpc_rqst_userns(req);
1910 struct nfs3_linkres *result = data;
1911 enum nfs_stat status;
1914 error = decode_nfsstat3(xdr, &status);
1915 if (unlikely(error))
1917 error = decode_post_op_attr(xdr, result->fattr, userns);
1918 if (unlikely(error))
1920 error = decode_wcc_data(xdr, result->dir_attr, userns);
1921 if (unlikely(error))
1923 if (status != NFS3_OK)
1928 return nfs3_stat_to_errno(status);
1932 * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in
1933 * the local page cache
1934 * @xdr: XDR stream where entry resides
1935 * @entry: buffer to fill in with entry data
1936 * @plus: boolean indicating whether this should be a readdirplus entry
1938 * Returns zero if successful, otherwise a negative errno value is
1941 * This function is not invoked during READDIR reply decoding, but
1942 * rather whenever an application invokes the getdents(2) system call
1943 * on a directory already in our cache.
1951 * fhandle3 filehandle;
1952 * post_op_attr3 attributes;
1953 * entry3 *nextentry;
1957 * struct entryplus3 {
1961 * post_op_attr name_attributes;
1962 * post_op_fh3 name_handle;
1963 * entryplus3 *nextentry;
1966 int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
1969 struct user_namespace *userns = rpc_userns(entry->server->client);
1970 struct nfs_entry old = *entry;
1975 p = xdr_inline_decode(xdr, 4);
1978 if (*p == xdr_zero) {
1979 p = xdr_inline_decode(xdr, 4);
1988 error = decode_fileid3(xdr, &entry->ino);
1989 if (unlikely(error))
1992 error = decode_inline_filename3(xdr, &entry->name, &entry->len);
1993 if (unlikely(error))
1996 error = decode_cookie3(xdr, &new_cookie);
1997 if (unlikely(error))
2000 entry->d_type = DT_UNKNOWN;
2003 entry->fattr->valid = 0;
2004 error = decode_post_op_attr(xdr, entry->fattr, userns);
2005 if (unlikely(error))
2007 if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
2008 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
2010 if (entry->fattr->fileid != entry->ino) {
2011 entry->fattr->mounted_on_fileid = entry->ino;
2012 entry->fattr->valid |= NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
2015 /* In fact, a post_op_fh3: */
2016 p = xdr_inline_decode(xdr, 4);
2019 if (*p != xdr_zero) {
2020 error = decode_nfs_fh3(xdr, entry->fh);
2021 if (unlikely(error)) {
2022 if (error == -E2BIG)
2027 zero_nfs_fh3(entry->fh);
2030 entry->prev_cookie = entry->cookie;
2031 entry->cookie = new_cookie;
2036 dprintk("NFS: directory entry contains invalid file handle\n");
2042 * 3.3.16 READDIR3res
2049 * struct READDIR3resok {
2050 * post_op_attr dir_attributes;
2051 * cookieverf3 cookieverf;
2055 * struct READDIR3resfail {
2056 * post_op_attr dir_attributes;
2059 * union READDIR3res switch (nfsstat3 status) {
2061 * READDIR3resok resok;
2063 * READDIR3resfail resfail;
2066 * Read the directory contents into the page cache, but otherwise
2067 * don't touch them. The actual decoding is done by nfs3_decode_entry()
2068 * during subsequent nfs_readdir() calls.
2070 static int decode_dirlist3(struct xdr_stream *xdr)
2072 return xdr_read_pages(xdr, xdr->buf->page_len);
2075 static int decode_readdir3resok(struct xdr_stream *xdr,
2076 struct nfs3_readdirres *result,
2077 struct user_namespace *userns)
2081 error = decode_post_op_attr(xdr, result->dir_attr, userns);
2082 if (unlikely(error))
2084 /* XXX: do we need to check if result->verf != NULL ? */
2085 error = decode_cookieverf3(xdr, result->verf);
2086 if (unlikely(error))
2088 error = decode_dirlist3(xdr);
2093 static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req,
2094 struct xdr_stream *xdr,
2097 struct nfs3_readdirres *result = data;
2098 enum nfs_stat status;
2101 error = decode_nfsstat3(xdr, &status);
2102 if (unlikely(error))
2104 if (status != NFS3_OK)
2106 error = decode_readdir3resok(xdr, result, rpc_rqst_userns(req));
2110 error = decode_post_op_attr(xdr, result->dir_attr, rpc_rqst_userns(req));
2111 if (unlikely(error))
2113 return nfs3_stat_to_errno(status);
2119 * struct FSSTAT3resok {
2120 * post_op_attr obj_attributes;
2130 * struct FSSTAT3resfail {
2131 * post_op_attr obj_attributes;
2134 * union FSSTAT3res switch (nfsstat3 status) {
2136 * FSSTAT3resok resok;
2138 * FSSTAT3resfail resfail;
2141 static int decode_fsstat3resok(struct xdr_stream *xdr,
2142 struct nfs_fsstat *result)
2146 p = xdr_inline_decode(xdr, 8 * 6 + 4);
2149 p = xdr_decode_size3(p, &result->tbytes);
2150 p = xdr_decode_size3(p, &result->fbytes);
2151 p = xdr_decode_size3(p, &result->abytes);
2152 p = xdr_decode_size3(p, &result->tfiles);
2153 p = xdr_decode_size3(p, &result->ffiles);
2154 xdr_decode_size3(p, &result->afiles);
2155 /* ignore invarsec */
2159 static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
2160 struct xdr_stream *xdr,
2163 struct nfs_fsstat *result = data;
2164 enum nfs_stat status;
2167 error = decode_nfsstat3(xdr, &status);
2168 if (unlikely(error))
2170 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
2171 if (unlikely(error))
2173 if (status != NFS3_OK)
2175 error = decode_fsstat3resok(xdr, result);
2179 return nfs3_stat_to_errno(status);
2185 * struct FSINFO3resok {
2186 * post_op_attr obj_attributes;
2194 * size3 maxfilesize;
2195 * nfstime3 time_delta;
2196 * uint32 properties;
2199 * struct FSINFO3resfail {
2200 * post_op_attr obj_attributes;
2203 * union FSINFO3res switch (nfsstat3 status) {
2205 * FSINFO3resok resok;
2207 * FSINFO3resfail resfail;
2210 static int decode_fsinfo3resok(struct xdr_stream *xdr,
2211 struct nfs_fsinfo *result)
2215 p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4);
2218 result->rtmax = be32_to_cpup(p++);
2219 result->rtpref = be32_to_cpup(p++);
2220 result->rtmult = be32_to_cpup(p++);
2221 result->wtmax = be32_to_cpup(p++);
2222 result->wtpref = be32_to_cpup(p++);
2223 result->wtmult = be32_to_cpup(p++);
2224 result->dtpref = be32_to_cpup(p++);
2225 p = xdr_decode_size3(p, &result->maxfilesize);
2226 xdr_decode_nfstime3(p, &result->time_delta);
2228 /* ignore properties */
2229 result->lease_time = 0;
2230 result->change_attr_type = NFS4_CHANGE_TYPE_IS_TIME_METADATA;
2234 static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
2235 struct xdr_stream *xdr,
2238 struct nfs_fsinfo *result = data;
2239 enum nfs_stat status;
2242 error = decode_nfsstat3(xdr, &status);
2243 if (unlikely(error))
2245 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
2246 if (unlikely(error))
2248 if (status != NFS3_OK)
2250 error = decode_fsinfo3resok(xdr, result);
2254 return nfs3_stat_to_errno(status);
2258 * 3.3.20 PATHCONF3res
2260 * struct PATHCONF3resok {
2261 * post_op_attr obj_attributes;
2265 * bool chown_restricted;
2266 * bool case_insensitive;
2267 * bool case_preserving;
2270 * struct PATHCONF3resfail {
2271 * post_op_attr obj_attributes;
2274 * union PATHCONF3res switch (nfsstat3 status) {
2276 * PATHCONF3resok resok;
2278 * PATHCONF3resfail resfail;
2281 static int decode_pathconf3resok(struct xdr_stream *xdr,
2282 struct nfs_pathconf *result)
2286 p = xdr_inline_decode(xdr, 4 * 6);
2289 result->max_link = be32_to_cpup(p++);
2290 result->max_namelen = be32_to_cpup(p);
2291 /* ignore remaining fields */
2295 static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
2296 struct xdr_stream *xdr,
2299 struct nfs_pathconf *result = data;
2300 enum nfs_stat status;
2303 error = decode_nfsstat3(xdr, &status);
2304 if (unlikely(error))
2306 error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
2307 if (unlikely(error))
2309 if (status != NFS3_OK)
2311 error = decode_pathconf3resok(xdr, result);
2315 return nfs3_stat_to_errno(status);
2321 * struct COMMIT3resok {
2322 * wcc_data file_wcc;
2326 * struct COMMIT3resfail {
2327 * wcc_data file_wcc;
2330 * union COMMIT3res switch (nfsstat3 status) {
2332 * COMMIT3resok resok;
2334 * COMMIT3resfail resfail;
2337 static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
2338 struct xdr_stream *xdr,
2341 struct nfs_commitres *result = data;
2342 struct nfs_writeverf *verf = result->verf;
2343 enum nfs_stat status;
2346 error = decode_nfsstat3(xdr, &status);
2347 if (unlikely(error))
2349 error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req));
2350 if (unlikely(error))
2352 result->op_status = status;
2353 if (status != NFS3_OK)
2355 error = decode_writeverf3(xdr, &verf->verifier);
2357 verf->committed = NFS_FILE_SYNC;
2361 return nfs3_stat_to_errno(status);
2364 #ifdef CONFIG_NFS_V3_ACL
2366 static inline int decode_getacl3resok(struct xdr_stream *xdr,
2367 struct nfs3_getaclres *result,
2368 struct user_namespace *userns)
2370 struct posix_acl **acl;
2371 unsigned int *aclcnt;
2375 error = decode_post_op_attr(xdr, result->fattr, userns);
2376 if (unlikely(error))
2378 error = decode_uint32(xdr, &result->mask);
2379 if (unlikely(error))
2382 if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
2385 hdrlen = xdr_stream_pos(xdr);
2388 if (result->mask & NFS_ACL)
2389 acl = &result->acl_access;
2391 if (result->mask & NFS_ACLCNT)
2392 aclcnt = &result->acl_access_count;
2393 error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl);
2394 if (unlikely(error <= 0))
2398 if (result->mask & NFS_DFACL)
2399 acl = &result->acl_default;
2401 if (result->mask & NFS_DFACLCNT)
2402 aclcnt = &result->acl_default_count;
2403 error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl);
2404 if (unlikely(error <= 0))
2411 static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req,
2412 struct xdr_stream *xdr,
2415 enum nfs_stat status;
2418 error = decode_nfsstat3(xdr, &status);
2419 if (unlikely(error))
2421 if (status != NFS3_OK)
2423 error = decode_getacl3resok(xdr, result, rpc_rqst_userns(req));
2427 return nfs3_stat_to_errno(status);
2430 static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
2431 struct xdr_stream *xdr,
2434 enum nfs_stat status;
2437 error = decode_nfsstat3(xdr, &status);
2438 if (unlikely(error))
2440 if (status != NFS3_OK)
2442 error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req));
2446 return nfs3_stat_to_errno(status);
2449 #endif /* CONFIG_NFS_V3_ACL */
2453 * We need to translate between nfs status return values and
2454 * the local errno values which may not be the same.
2456 static const struct {
2461 { NFSERR_PERM, -EPERM },
2462 { NFSERR_NOENT, -ENOENT },
2463 { NFSERR_IO, -errno_NFSERR_IO},
2464 { NFSERR_NXIO, -ENXIO },
2465 /* { NFSERR_EAGAIN, -EAGAIN }, */
2466 { NFSERR_ACCES, -EACCES },
2467 { NFSERR_EXIST, -EEXIST },
2468 { NFSERR_XDEV, -EXDEV },
2469 { NFSERR_NODEV, -ENODEV },
2470 { NFSERR_NOTDIR, -ENOTDIR },
2471 { NFSERR_ISDIR, -EISDIR },
2472 { NFSERR_INVAL, -EINVAL },
2473 { NFSERR_FBIG, -EFBIG },
2474 { NFSERR_NOSPC, -ENOSPC },
2475 { NFSERR_ROFS, -EROFS },
2476 { NFSERR_MLINK, -EMLINK },
2477 { NFSERR_NAMETOOLONG, -ENAMETOOLONG },
2478 { NFSERR_NOTEMPTY, -ENOTEMPTY },
2479 { NFSERR_DQUOT, -EDQUOT },
2480 { NFSERR_STALE, -ESTALE },
2481 { NFSERR_REMOTE, -EREMOTE },
2483 { NFSERR_WFLUSH, -EWFLUSH },
2485 { NFSERR_BADHANDLE, -EBADHANDLE },
2486 { NFSERR_NOT_SYNC, -ENOTSYNC },
2487 { NFSERR_BAD_COOKIE, -EBADCOOKIE },
2488 { NFSERR_NOTSUPP, -ENOTSUPP },
2489 { NFSERR_TOOSMALL, -ETOOSMALL },
2490 { NFSERR_SERVERFAULT, -EREMOTEIO },
2491 { NFSERR_BADTYPE, -EBADTYPE },
2492 { NFSERR_JUKEBOX, -EJUKEBOX },
2497 * nfs3_stat_to_errno - convert an NFS status code to a local errno
2498 * @status: NFS status code to convert
2500 * Returns a local errno value, or -EIO if the NFS status code is
2501 * not recognized. This function is used jointly by NFSv2 and NFSv3.
2503 static int nfs3_stat_to_errno(enum nfs_stat status)
2507 for (i = 0; nfs_errtbl[i].stat != -1; i++) {
2508 if (nfs_errtbl[i].stat == (int)status)
2509 return nfs_errtbl[i].errno;
2511 dprintk("NFS: Unrecognized nfs status value: %u\n", status);
2512 return nfs_errtbl[i].errno;
2516 #define PROC(proc, argtype, restype, timer) \
2517 [NFS3PROC_##proc] = { \
2518 .p_proc = NFS3PROC_##proc, \
2519 .p_encode = nfs3_xdr_enc_##argtype##3args, \
2520 .p_decode = nfs3_xdr_dec_##restype##3res, \
2521 .p_arglen = NFS3_##argtype##args_sz, \
2522 .p_replen = NFS3_##restype##res_sz, \
2524 .p_statidx = NFS3PROC_##proc, \
2528 const struct rpc_procinfo nfs3_procedures[] = {
2529 PROC(GETATTR, getattr, getattr, 1),
2530 PROC(SETATTR, setattr, setattr, 0),
2531 PROC(LOOKUP, lookup, lookup, 2),
2532 PROC(ACCESS, access, access, 1),
2533 PROC(READLINK, readlink, readlink, 3),
2534 PROC(READ, read, read, 3),
2535 PROC(WRITE, write, write, 4),
2536 PROC(CREATE, create, create, 0),
2537 PROC(MKDIR, mkdir, create, 0),
2538 PROC(SYMLINK, symlink, create, 0),
2539 PROC(MKNOD, mknod, create, 0),
2540 PROC(REMOVE, remove, remove, 0),
2541 PROC(RMDIR, lookup, setattr, 0),
2542 PROC(RENAME, rename, rename, 0),
2543 PROC(LINK, link, link, 0),
2544 PROC(READDIR, readdir, readdir, 3),
2545 PROC(READDIRPLUS, readdirplus, readdir, 3),
2546 PROC(FSSTAT, getattr, fsstat, 0),
2547 PROC(FSINFO, getattr, fsinfo, 0),
2548 PROC(PATHCONF, getattr, pathconf, 0),
2549 PROC(COMMIT, commit, commit, 5),
2552 static unsigned int nfs_version3_counts[ARRAY_SIZE(nfs3_procedures)];
2553 const struct rpc_version nfs_version3 = {
2555 .nrprocs = ARRAY_SIZE(nfs3_procedures),
2556 .procs = nfs3_procedures,
2557 .counts = nfs_version3_counts,
2560 #ifdef CONFIG_NFS_V3_ACL
2561 static const struct rpc_procinfo nfs3_acl_procedures[] = {
2562 [ACLPROC3_GETACL] = {
2563 .p_proc = ACLPROC3_GETACL,
2564 .p_encode = nfs3_xdr_enc_getacl3args,
2565 .p_decode = nfs3_xdr_dec_getacl3res,
2566 .p_arglen = ACL3_getaclargs_sz,
2567 .p_replen = ACL3_getaclres_sz,
2571 [ACLPROC3_SETACL] = {
2572 .p_proc = ACLPROC3_SETACL,
2573 .p_encode = nfs3_xdr_enc_setacl3args,
2574 .p_decode = nfs3_xdr_dec_setacl3res,
2575 .p_arglen = ACL3_setaclargs_sz,
2576 .p_replen = ACL3_setaclres_sz,
2582 static unsigned int nfs3_acl_counts[ARRAY_SIZE(nfs3_acl_procedures)];
2583 const struct rpc_version nfsacl_version3 = {
2585 .nrprocs = ARRAY_SIZE(nfs3_acl_procedures),
2586 .procs = nfs3_acl_procedures,
2587 .counts = nfs3_acl_counts,
2589 #endif /* CONFIG_NFS_V3_ACL */