2 * linux/fs/nfs/nfs3xdr.c
4 * XDR functions to encode/decode NFSv3 RPC arguments and results.
6 * Copyright (C) 1996, 1997 Olaf Kirch
9 #include <linux/param.h>
10 #include <linux/time.h>
12 #include <linux/errno.h>
13 #include <linux/string.h>
15 #include <linux/pagemap.h>
16 #include <linux/proc_fs.h>
17 #include <linux/kdev_t.h>
18 #include <linux/sunrpc/clnt.h>
19 #include <linux/nfs.h>
20 #include <linux/nfs3.h>
21 #include <linux/nfs_fs.h>
22 #include <linux/nfsacl.h>
25 #define NFSDBG_FACILITY NFSDBG_XDR
27 /* Mapping from NFS error code to "errno" error code. */
28 #define errno_NFSERR_IO EIO
31 * Declare the space requirements for NFS arguments and replies as
32 * number of 32bit-words
34 #define NFS3_fhandle_sz (1+16)
35 #define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */
36 #define NFS3_sattr_sz (15)
37 #define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2))
38 #define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2))
39 #define NFS3_fattr_sz (21)
40 #define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2)
41 #define NFS3_wcc_attr_sz (6)
42 #define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz)
43 #define NFS3_post_op_attr_sz (1+NFS3_fattr_sz)
44 #define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz)
45 #define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz)
47 #define NFS3_getattrargs_sz (NFS3_fh_sz)
48 #define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3)
49 #define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz)
50 #define NFS3_accessargs_sz (NFS3_fh_sz+1)
51 #define NFS3_readlinkargs_sz (NFS3_fh_sz)
52 #define NFS3_readargs_sz (NFS3_fh_sz+3)
53 #define NFS3_writeargs_sz (NFS3_fh_sz+5)
54 #define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
55 #define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz)
56 #define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz)
57 #define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz)
58 #define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz)
59 #define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz)
60 #define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz)
61 #define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3)
62 #define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4)
63 #define NFS3_commitargs_sz (NFS3_fh_sz+3)
65 #define NFS3_getattrres_sz (1+NFS3_fattr_sz)
66 #define NFS3_setattrres_sz (1+NFS3_wcc_data_sz)
67 #define NFS3_removeres_sz (NFS3_setattrres_sz)
68 #define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
69 #define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1)
70 #define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1)
71 #define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3)
72 #define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4)
73 #define NFS3_createres_sz (1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
74 #define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz))
75 #define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
76 #define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2)
77 #define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13)
78 #define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12)
79 #define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6)
80 #define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2)
82 #define ACL3_getaclargs_sz (NFS3_fh_sz+1)
83 #define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \
84 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
85 #define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \
86 XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
87 #define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz)
90 * Map file type to S_IFMT bits
92 static const umode_t nfs_type2fmt[] = {
104 * While encoding arguments, set up the reply buffer in advance to
105 * receive reply data directly into the page cache.
107 static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages,
108 unsigned int base, unsigned int len,
109 unsigned int bufsize)
111 struct rpc_auth *auth = req->rq_cred->cr_auth;
114 replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize;
115 xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len);
119 * Handle decode buffer overflows out-of-line.
121 static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
123 dprintk("NFS: %s prematurely hit the end of our receive buffer. "
124 "Remaining buffer length is %tu words.\n",
125 func, xdr->end - xdr->p);
130 * Encode/decode NFSv3 basic data types
132 * Basic NFSv3 data types are defined in section 2.5 of RFC 1813:
133 * "NFS Version 3 Protocol Specification".
135 * Not all basic data types have their own encoding and decoding
136 * functions. For run-time efficiency, some data types are encoded
140 static void encode_uint32(struct xdr_stream *xdr, u32 value)
142 __be32 *p = xdr_reserve_space(xdr, 4);
143 *p = cpu_to_be32(value);
146 static int decode_uint32(struct xdr_stream *xdr, u32 *value)
150 p = xdr_inline_decode(xdr, 4);
151 if (unlikely(p == NULL))
153 *value = be32_to_cpup(p);
156 print_overflow_msg(__func__, xdr);
160 static int decode_uint64(struct xdr_stream *xdr, u64 *value)
164 p = xdr_inline_decode(xdr, 8);
165 if (unlikely(p == NULL))
167 xdr_decode_hyper(p, value);
170 print_overflow_msg(__func__, xdr);
177 * typedef uint64 fileid3;
179 static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid)
181 return xdr_decode_hyper(p, fileid);
184 static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid)
186 return decode_uint64(xdr, fileid);
192 * typedef string filename3<>;
194 static void encode_filename3(struct xdr_stream *xdr,
195 const char *name, u32 length)
199 BUG_ON(length > NFS3_MAXNAMLEN);
200 p = xdr_reserve_space(xdr, 4 + length);
201 xdr_encode_opaque(p, name, length);
204 static int decode_inline_filename3(struct xdr_stream *xdr,
205 const char **name, u32 *length)
210 p = xdr_inline_decode(xdr, 4);
211 if (unlikely(p == NULL))
213 count = be32_to_cpup(p);
214 if (count > NFS3_MAXNAMLEN)
215 goto out_nametoolong;
216 p = xdr_inline_decode(xdr, count);
217 if (unlikely(p == NULL))
219 *name = (const char *)p;
224 dprintk("NFS: returned filename too long: %u\n", count);
225 return -ENAMETOOLONG;
227 print_overflow_msg(__func__, xdr);
234 * typedef string nfspath3<>;
236 static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages,
239 BUG_ON(length > NFS3_MAXPATHLEN);
240 encode_uint32(xdr, length);
241 xdr_write_pages(xdr, pages, 0, length);
244 static int decode_nfspath3(struct xdr_stream *xdr)
250 p = xdr_inline_decode(xdr, 4);
251 if (unlikely(p == NULL))
253 count = be32_to_cpup(p);
254 if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN))
255 goto out_nametoolong;
256 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
257 recvd = xdr->buf->len - hdrlen;
258 if (unlikely(count > recvd))
261 xdr_read_pages(xdr, count);
262 xdr_terminate_string(xdr->buf, count);
266 dprintk("NFS: returned pathname too long: %u\n", count);
267 return -ENAMETOOLONG;
269 dprintk("NFS: server cheating in pathname result: "
270 "count %u > recvd %u\n", count, recvd);
273 print_overflow_msg(__func__, xdr);
280 * typedef uint64 cookie3
282 static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie)
284 return xdr_encode_hyper(p, cookie);
287 static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie)
289 return decode_uint64(xdr, cookie);
295 * typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE];
297 static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier)
299 memcpy(p, verifier, NFS3_COOKIEVERFSIZE);
300 return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE);
303 static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier)
307 p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
308 if (unlikely(p == NULL))
310 memcpy(verifier, p, NFS3_COOKIEVERFSIZE);
313 print_overflow_msg(__func__, xdr);
320 * typedef opaque createverf3[NFS3_CREATEVERFSIZE];
322 static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier)
326 p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE);
327 memcpy(p, verifier, NFS3_CREATEVERFSIZE);
330 static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier)
334 p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE);
335 if (unlikely(p == NULL))
337 memcpy(verifier, p, NFS3_WRITEVERFSIZE);
340 print_overflow_msg(__func__, xdr);
347 * typedef uint64 size3;
349 static __be32 *xdr_decode_size3(__be32 *p, u64 *size)
351 return xdr_decode_hyper(p, size);
362 #define NFS3_OK NFS_OK
364 static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
368 p = xdr_inline_decode(xdr, 4);
369 if (unlikely(p == NULL))
371 *status = be32_to_cpup(p);
374 print_overflow_msg(__func__, xdr);
391 static void encode_ftype3(struct xdr_stream *xdr, const u32 type)
393 BUG_ON(type > NF3FIFO);
394 encode_uint32(xdr, type);
397 static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode)
401 type = be32_to_cpup(p++);
404 *mode = nfs_type2fmt[type];
416 static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev)
420 p = xdr_reserve_space(xdr, 8);
421 *p++ = cpu_to_be32(MAJOR(rdev));
422 *p = cpu_to_be32(MINOR(rdev));
425 static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev)
427 unsigned int major, minor;
429 major = be32_to_cpup(p++);
430 minor = be32_to_cpup(p++);
431 *rdev = MKDEV(major, minor);
432 if (MAJOR(*rdev) != major || MINOR(*rdev) != minor)
441 * opaque data<NFS3_FHSIZE>;
444 static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh)
448 BUG_ON(fh->size > NFS3_FHSIZE);
449 p = xdr_reserve_space(xdr, 4 + fh->size);
450 xdr_encode_opaque(p, fh->data, fh->size);
453 static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
458 p = xdr_inline_decode(xdr, 4);
459 if (unlikely(p == NULL))
461 length = be32_to_cpup(p++);
462 if (unlikely(length > NFS3_FHSIZE))
464 p = xdr_inline_decode(xdr, length);
465 if (unlikely(p == NULL))
468 memcpy(fh->data, p, length);
471 dprintk("NFS: file handle size (%u) too big\n", length);
474 print_overflow_msg(__func__, xdr);
478 static void zero_nfs_fh3(struct nfs_fh *fh)
480 memset(fh, 0, sizeof(*fh));
491 static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec *timep)
493 *p++ = cpu_to_be32(timep->tv_sec);
494 *p++ = cpu_to_be32(timep->tv_nsec);
498 static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep)
500 timep->tv_sec = be32_to_cpup(p++);
501 timep->tv_nsec = be32_to_cpup(p++);
510 * SET_TO_SERVER_TIME = 1,
511 * SET_TO_CLIENT_TIME = 2
514 * union set_mode3 switch (bool set_it) {
521 * union set_uid3 switch (bool set_it) {
528 * union set_gid3 switch (bool set_it) {
535 * union set_size3 switch (bool set_it) {
542 * union set_atime switch (time_how set_it) {
543 * case SET_TO_CLIENT_TIME:
549 * union set_mtime switch (time_how set_it) {
550 * case SET_TO_CLIENT_TIME:
565 static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
571 * In order to make only a single xdr_reserve_space() call,
572 * pre-compute the total number of bytes to be reserved.
573 * Six boolean values, one for each set_foo field, are always
574 * present in the encoded result, so start there.
577 if (attr->ia_valid & ATTR_MODE)
579 if (attr->ia_valid & ATTR_UID)
581 if (attr->ia_valid & ATTR_GID)
583 if (attr->ia_valid & ATTR_SIZE)
585 if (attr->ia_valid & ATTR_ATIME_SET)
587 if (attr->ia_valid & ATTR_MTIME_SET)
589 p = xdr_reserve_space(xdr, nbytes);
591 if (attr->ia_valid & ATTR_MODE) {
593 *p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO);
597 if (attr->ia_valid & ATTR_UID) {
599 *p++ = cpu_to_be32(attr->ia_uid);
603 if (attr->ia_valid & ATTR_GID) {
605 *p++ = cpu_to_be32(attr->ia_gid);
609 if (attr->ia_valid & ATTR_SIZE) {
611 p = xdr_encode_hyper(p, (u64)attr->ia_size);
615 if (attr->ia_valid & ATTR_ATIME_SET) {
617 p = xdr_encode_nfstime3(p, &attr->ia_atime);
618 } else if (attr->ia_valid & ATTR_ATIME) {
623 if (attr->ia_valid & ATTR_MTIME_SET) {
625 xdr_encode_nfstime3(p, &attr->ia_mtime);
626 } else if (attr->ia_valid & ATTR_MTIME) {
651 static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
656 p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2);
657 if (unlikely(p == NULL))
660 p = xdr_decode_ftype3(p, &fmode);
662 fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode;
663 fattr->nlink = be32_to_cpup(p++);
664 fattr->uid = be32_to_cpup(p++);
665 fattr->gid = be32_to_cpup(p++);
667 p = xdr_decode_size3(p, &fattr->size);
668 p = xdr_decode_size3(p, &fattr->du.nfs3.used);
669 p = xdr_decode_specdata3(p, &fattr->rdev);
671 p = xdr_decode_hyper(p, &fattr->fsid.major);
672 fattr->fsid.minor = 0;
674 p = xdr_decode_fileid3(p, &fattr->fileid);
675 p = xdr_decode_nfstime3(p, &fattr->atime);
676 p = xdr_decode_nfstime3(p, &fattr->mtime);
677 xdr_decode_nfstime3(p, &fattr->ctime);
679 fattr->valid |= NFS_ATTR_FATTR_V3;
682 print_overflow_msg(__func__, xdr);
689 * union post_op_attr switch (bool attributes_follow) {
696 static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
700 p = xdr_inline_decode(xdr, 4);
701 if (unlikely(p == NULL))
704 return decode_fattr3(xdr, fattr);
707 print_overflow_msg(__func__, xdr);
719 static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
723 p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2);
724 if (unlikely(p == NULL))
727 fattr->valid |= NFS_ATTR_FATTR_PRESIZE
728 | NFS_ATTR_FATTR_PREMTIME
729 | NFS_ATTR_FATTR_PRECTIME;
731 p = xdr_decode_size3(p, &fattr->pre_size);
732 p = xdr_decode_nfstime3(p, &fattr->pre_mtime);
733 xdr_decode_nfstime3(p, &fattr->pre_ctime);
737 print_overflow_msg(__func__, xdr);
743 * union pre_op_attr switch (bool attributes_follow) {
745 * wcc_attr attributes;
753 * pre_op_attr before;
754 * post_op_attr after;
757 static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
761 p = xdr_inline_decode(xdr, 4);
762 if (unlikely(p == NULL))
765 return decode_wcc_attr(xdr, fattr);
768 print_overflow_msg(__func__, xdr);
772 static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr)
776 error = decode_pre_op_attr(xdr, fattr);
779 error = decode_post_op_attr(xdr, fattr);
787 * union post_op_fh3 switch (bool handle_follows) {
794 static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
796 __be32 *p = xdr_inline_decode(xdr, 4);
797 if (unlikely(p == NULL))
800 return decode_nfs_fh3(xdr, fh);
804 print_overflow_msg(__func__, xdr);
811 * struct diropargs3 {
816 static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh,
817 const char *name, u32 length)
819 encode_nfs_fh3(xdr, fh);
820 encode_filename3(xdr, name, length);
825 * NFSv3 XDR encode functions
827 * NFSv3 argument types are defined in section 3.3 of RFC 1813:
828 * "NFS Version 3 Protocol Specification".
834 * struct GETATTR3args {
838 static int nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, __be32 *p,
839 const struct nfs_fh *fh)
841 struct xdr_stream xdr;
843 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
844 encode_nfs_fh3(&xdr, fh);
851 * union sattrguard3 switch (bool check) {
853 * nfstime3 obj_ctime;
858 * struct SETATTR3args {
860 * sattr3 new_attributes;
864 static void encode_sattrguard3(struct xdr_stream *xdr,
865 const struct nfs3_sattrargs *args)
870 p = xdr_reserve_space(xdr, 4 + 8);
872 xdr_encode_nfstime3(p, &args->guardtime);
874 p = xdr_reserve_space(xdr, 4);
879 static int nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, __be32 *p,
880 const struct nfs3_sattrargs *args)
882 struct xdr_stream xdr;
884 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
885 encode_nfs_fh3(&xdr, args->fh);
886 encode_sattr3(&xdr, args->sattr);
887 encode_sattrguard3(&xdr, args);
894 * struct LOOKUP3args {
898 static int nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, __be32 *p,
899 const struct nfs3_diropargs *args)
901 struct xdr_stream xdr;
903 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
904 encode_diropargs3(&xdr, args->fh, args->name, args->len);
911 * struct ACCESS3args {
916 static void encode_access3args(struct xdr_stream *xdr,
917 const struct nfs3_accessargs *args)
919 encode_nfs_fh3(xdr, args->fh);
920 encode_uint32(xdr, args->access);
923 static int nfs3_xdr_enc_access3args(struct rpc_rqst *req, __be32 *p,
924 const struct nfs3_accessargs *args)
926 struct xdr_stream xdr;
928 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
929 encode_access3args(&xdr, args);
934 * 3.3.5 READLINK3args
936 * struct READLINK3args {
940 static int nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, __be32 *p,
941 const struct nfs3_readlinkargs *args)
943 struct xdr_stream xdr;
945 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
946 encode_nfs_fh3(&xdr, args->fh);
947 prepare_reply_buffer(req, args->pages, args->pgbase,
948 args->pglen, NFS3_readlinkres_sz);
961 static void encode_read3args(struct xdr_stream *xdr,
962 const struct nfs_readargs *args)
966 encode_nfs_fh3(xdr, args->fh);
968 p = xdr_reserve_space(xdr, 8 + 4);
969 p = xdr_encode_hyper(p, args->offset);
970 *p = cpu_to_be32(args->count);
973 static int nfs3_xdr_enc_read3args(struct rpc_rqst *req, __be32 *p,
974 const struct nfs_readargs *args)
976 struct xdr_stream xdr;
978 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
979 encode_read3args(&xdr, args);
980 prepare_reply_buffer(req, args->pages, args->pgbase,
981 args->count, NFS3_readres_sz);
982 req->rq_rcv_buf.flags |= XDRBUF_READ;
995 * struct WRITE3args {
1003 static void encode_write3args(struct xdr_stream *xdr,
1004 const struct nfs_writeargs *args)
1008 encode_nfs_fh3(xdr, args->fh);
1010 p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4);
1011 p = xdr_encode_hyper(p, args->offset);
1012 *p++ = cpu_to_be32(args->count);
1013 *p++ = cpu_to_be32(args->stable);
1014 *p = cpu_to_be32(args->count);
1015 xdr_write_pages(xdr, args->pages, args->pgbase, args->count);
1018 static int nfs3_xdr_enc_write3args(struct rpc_rqst *req, __be32 *p,
1019 const struct nfs_writeargs *args)
1021 struct xdr_stream xdr;
1023 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1024 encode_write3args(&xdr, args);
1025 xdr.buf->flags |= XDRBUF_WRITE;
1032 * enum createmode3 {
1038 * union createhow3 switch (createmode3 mode) {
1041 * sattr3 obj_attributes;
1046 * struct CREATE3args {
1051 static void encode_createhow3(struct xdr_stream *xdr,
1052 const struct nfs3_createargs *args)
1054 encode_uint32(xdr, args->createmode);
1055 switch (args->createmode) {
1056 case NFS3_CREATE_UNCHECKED:
1057 case NFS3_CREATE_GUARDED:
1058 encode_sattr3(xdr, args->sattr);
1060 case NFS3_CREATE_EXCLUSIVE:
1061 encode_createverf3(xdr, args->verifier);
1068 static int nfs3_xdr_enc_create3args(struct rpc_rqst *req, __be32 *p,
1069 const struct nfs3_createargs *args)
1071 struct xdr_stream xdr;
1073 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1074 encode_diropargs3(&xdr, args->fh, args->name, args->len);
1075 encode_createhow3(&xdr, args);
1082 * struct MKDIR3args {
1084 * sattr3 attributes;
1087 static int nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, __be32 *p,
1088 const struct nfs3_mkdirargs *args)
1090 struct xdr_stream xdr;
1092 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1093 encode_diropargs3(&xdr, args->fh, args->name, args->len);
1094 encode_sattr3(&xdr, args->sattr);
1099 * 3.3.10 SYMLINK3args
1101 * struct symlinkdata3 {
1102 * sattr3 symlink_attributes;
1103 * nfspath3 symlink_data;
1106 * struct SYMLINK3args {
1108 * symlinkdata3 symlink;
1111 static void encode_symlinkdata3(struct xdr_stream *xdr,
1112 const struct nfs3_symlinkargs *args)
1114 encode_sattr3(xdr, args->sattr);
1115 encode_nfspath3(xdr, args->pages, args->pathlen);
1118 static int nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, __be32 *p,
1119 const struct nfs3_symlinkargs *args)
1121 struct xdr_stream xdr;
1123 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1124 encode_diropargs3(&xdr, args->fromfh, args->fromname, args->fromlen);
1125 encode_symlinkdata3(&xdr, args);
1132 * struct devicedata3 {
1133 * sattr3 dev_attributes;
1137 * union mknoddata3 switch (ftype3 type) {
1140 * devicedata3 device;
1143 * sattr3 pipe_attributes;
1148 * struct MKNOD3args {
1153 static void encode_devicedata3(struct xdr_stream *xdr,
1154 const struct nfs3_mknodargs *args)
1156 encode_sattr3(xdr, args->sattr);
1157 encode_specdata3(xdr, args->rdev);
1160 static void encode_mknoddata3(struct xdr_stream *xdr,
1161 const struct nfs3_mknodargs *args)
1163 encode_ftype3(xdr, args->type);
1164 switch (args->type) {
1167 encode_devicedata3(xdr, args);
1171 encode_sattr3(xdr, args->sattr);
1181 static int nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, __be32 *p,
1182 const struct nfs3_mknodargs *args)
1184 struct xdr_stream xdr;
1186 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1187 encode_diropargs3(&xdr, args->fh, args->name, args->len);
1188 encode_mknoddata3(&xdr, args);
1193 * 3.3.12 REMOVE3args
1195 * struct REMOVE3args {
1196 * diropargs3 object;
1199 static int nfs3_xdr_enc_remove3args(struct rpc_rqst *req, __be32 *p,
1200 const struct nfs_removeargs *args)
1202 struct xdr_stream xdr;
1204 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1205 encode_diropargs3(&xdr, args->fh, args->name.name, args->name.len);
1210 * 3.3.14 RENAME3args
1212 * struct RENAME3args {
1217 static int nfs3_xdr_enc_rename3args(struct rpc_rqst *req, __be32 *p,
1218 const struct nfs_renameargs *args)
1220 const struct qstr *old = args->old_name;
1221 const struct qstr *new = args->new_name;
1222 struct xdr_stream xdr;
1224 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1225 encode_diropargs3(&xdr, args->old_dir, old->name, old->len);
1226 encode_diropargs3(&xdr, args->new_dir, new->name, new->len);
1233 * struct LINK3args {
1238 static int nfs3_xdr_enc_link3args(struct rpc_rqst *req, __be32 *p,
1239 const struct nfs3_linkargs *args)
1241 struct xdr_stream xdr;
1243 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1244 encode_nfs_fh3(&xdr, args->fromfh);
1245 encode_diropargs3(&xdr, args->tofh, args->toname, args->tolen);
1250 * 3.3.16 READDIR3args
1252 * struct READDIR3args {
1255 * cookieverf3 cookieverf;
1259 static void encode_readdir3args(struct xdr_stream *xdr,
1260 const struct nfs3_readdirargs *args)
1264 encode_nfs_fh3(xdr, args->fh);
1266 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4);
1267 p = xdr_encode_cookie3(p, args->cookie);
1268 p = xdr_encode_cookieverf3(p, args->verf);
1269 *p = cpu_to_be32(args->count);
1272 static int nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, __be32 *p,
1273 const struct nfs3_readdirargs *args)
1275 struct xdr_stream xdr;
1277 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1278 encode_readdir3args(&xdr, args);
1279 prepare_reply_buffer(req, args->pages, 0,
1280 args->count, NFS3_readdirres_sz);
1285 * 3.3.17 READDIRPLUS3args
1287 * struct READDIRPLUS3args {
1290 * cookieverf3 cookieverf;
1295 static void encode_readdirplus3args(struct xdr_stream *xdr,
1296 const struct nfs3_readdirargs *args)
1300 encode_nfs_fh3(xdr, args->fh);
1302 p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4);
1303 p = xdr_encode_cookie3(p, args->cookie);
1304 p = xdr_encode_cookieverf3(p, args->verf);
1307 * readdirplus: need dircount + buffer size.
1308 * We just make sure we make dircount big enough
1310 *p++ = cpu_to_be32(args->count >> 3);
1312 *p = cpu_to_be32(args->count);
1315 static int nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, __be32 *p,
1316 const struct nfs3_readdirargs *args)
1318 struct xdr_stream xdr;
1320 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1321 encode_readdirplus3args(&xdr, args);
1322 prepare_reply_buffer(req, args->pages, 0,
1323 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_writeargs *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 int nfs3_xdr_enc_commit3args(struct rpc_rqst *req, __be32 *p,
1349 const struct nfs_writeargs *args)
1351 struct xdr_stream xdr;
1353 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1354 encode_commit3args(&xdr, args);
1358 #ifdef CONFIG_NFS_V3_ACL
1360 static int nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, __be32 *p,
1361 const struct nfs3_getaclargs *args)
1363 struct xdr_stream xdr;
1365 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1366 encode_nfs_fh3(&xdr, args->fh);
1367 encode_uint32(&xdr, args->mask);
1368 if (args->mask & (NFS_ACL | NFS_DFACL))
1369 prepare_reply_buffer(req, args->pages, 0,
1370 NFSACL_MAXPAGES << PAGE_SHIFT,
1375 static int nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, __be32 *p,
1376 const struct nfs3_setaclargs *args)
1378 struct xdr_stream xdr;
1382 xdr_init_encode(&xdr, &req->rq_snd_buf, p);
1383 encode_nfs_fh3(&xdr, NFS_FH(args->inode));
1384 encode_uint32(&xdr, args->mask);
1385 if (args->npages != 0)
1386 xdr_write_pages(&xdr, args->pages, 0, args->len);
1388 base = req->rq_slen;
1389 error = nfsacl_encode(xdr.buf, base, args->inode,
1390 (args->mask & NFS_ACL) ?
1391 args->acl_access : NULL, 1, 0);
1393 error = nfsacl_encode(xdr.buf, base + error, args->inode,
1394 (args->mask & NFS_DFACL) ?
1395 args->acl_default : NULL, 1,
1401 #endif /* CONFIG_NFS_V3_ACL */
1404 * NFSv3 XDR decode functions
1406 * NFSv3 result types are defined in section 3.3 of RFC 1813:
1407 * "NFS Version 3 Protocol Specification".
1413 * struct GETATTR3resok {
1414 * fattr3 obj_attributes;
1417 * union GETATTR3res switch (nfsstat3 status) {
1419 * GETATTR3resok resok;
1424 static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, __be32 *p,
1425 struct nfs_fattr *result)
1427 struct xdr_stream xdr;
1428 enum nfs_stat status;
1431 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1432 error = decode_nfsstat3(&xdr, &status);
1433 if (unlikely(error))
1435 if (status != NFS3_OK)
1437 error = decode_fattr3(&xdr, result);
1441 return nfs_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, __be32 *p,
1463 struct nfs_fattr *result)
1465 struct xdr_stream xdr;
1466 enum nfs_stat status;
1469 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1470 error = decode_nfsstat3(&xdr, &status);
1471 if (unlikely(error))
1473 error = decode_wcc_data(&xdr, result);
1474 if (unlikely(error))
1476 if (status != NFS3_OK)
1481 return nfs_stat_to_errno(status);
1487 * struct LOOKUP3resok {
1489 * post_op_attr obj_attributes;
1490 * post_op_attr dir_attributes;
1493 * struct LOOKUP3resfail {
1494 * post_op_attr dir_attributes;
1497 * union LOOKUP3res switch (nfsstat3 status) {
1499 * LOOKUP3resok resok;
1501 * LOOKUP3resfail resfail;
1504 static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, __be32 *p,
1505 struct nfs3_diropres *result)
1507 struct xdr_stream xdr;
1508 enum nfs_stat status;
1511 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1512 error = decode_nfsstat3(&xdr, &status);
1513 if (unlikely(error))
1515 if (status != NFS3_OK)
1517 error = decode_nfs_fh3(&xdr, result->fh);
1518 if (unlikely(error))
1520 error = decode_post_op_attr(&xdr, result->fattr);
1521 if (unlikely(error))
1523 error = decode_post_op_attr(&xdr, result->dir_attr);
1527 error = decode_post_op_attr(&xdr, result->dir_attr);
1528 if (unlikely(error))
1530 return nfs_stat_to_errno(status);
1536 * struct ACCESS3resok {
1537 * post_op_attr obj_attributes;
1541 * struct ACCESS3resfail {
1542 * post_op_attr obj_attributes;
1545 * union ACCESS3res switch (nfsstat3 status) {
1547 * ACCESS3resok resok;
1549 * ACCESS3resfail resfail;
1552 static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, __be32 *p,
1553 struct nfs3_accessres *result)
1555 struct xdr_stream xdr;
1556 enum nfs_stat status;
1559 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1560 error = decode_nfsstat3(&xdr, &status);
1561 if (unlikely(error))
1563 error = decode_post_op_attr(&xdr, result->fattr);
1564 if (unlikely(error))
1566 if (status != NFS3_OK)
1568 error = decode_uint32(&xdr, &result->access);
1572 return nfs_stat_to_errno(status);
1576 * 3.3.5 READLINK3res
1578 * struct READLINK3resok {
1579 * post_op_attr symlink_attributes;
1583 * struct READLINK3resfail {
1584 * post_op_attr symlink_attributes;
1587 * union READLINK3res switch (nfsstat3 status) {
1589 * READLINK3resok resok;
1591 * READLINK3resfail resfail;
1594 static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, __be32 *p,
1595 struct nfs_fattr *result)
1597 struct xdr_stream xdr;
1598 enum nfs_stat status;
1601 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1602 error = decode_nfsstat3(&xdr, &status);
1603 if (unlikely(error))
1605 error = decode_post_op_attr(&xdr, result);
1606 if (unlikely(error))
1608 if (status != NFS3_OK)
1610 error = decode_nfspath3(&xdr);
1614 return nfs_stat_to_errno(status);
1620 * struct READ3resok {
1621 * post_op_attr file_attributes;
1627 * struct READ3resfail {
1628 * post_op_attr file_attributes;
1631 * union READ3res switch (nfsstat3 status) {
1635 * READ3resfail resfail;
1638 static int decode_read3resok(struct xdr_stream *xdr,
1639 struct nfs_readres *result)
1641 u32 eof, count, ocount, recvd;
1645 p = xdr_inline_decode(xdr, 4 + 4 + 4);
1646 if (unlikely(p == NULL))
1648 count = be32_to_cpup(p++);
1649 eof = be32_to_cpup(p++);
1650 ocount = be32_to_cpup(p++);
1651 if (unlikely(ocount != count))
1653 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
1654 recvd = xdr->buf->len - hdrlen;
1655 if (unlikely(count > recvd))
1659 xdr_read_pages(xdr, count);
1661 result->count = count;
1664 dprintk("NFS: READ count doesn't match length of opaque: "
1665 "count %u != ocount %u\n", count, ocount);
1668 dprintk("NFS: server cheating in read result: "
1669 "count %u > recvd %u\n", count, recvd);
1674 print_overflow_msg(__func__, xdr);
1678 static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, __be32 *p,
1679 struct nfs_readres *result)
1681 struct xdr_stream xdr;
1682 enum nfs_stat status;
1685 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1686 error = decode_nfsstat3(&xdr, &status);
1687 if (unlikely(error))
1689 error = decode_post_op_attr(&xdr, result->fattr);
1690 if (unlikely(error))
1692 if (status != NFS3_OK)
1694 error = decode_read3resok(&xdr, result);
1698 return nfs_stat_to_errno(status);
1710 * struct WRITE3resok {
1711 * wcc_data file_wcc;
1713 * stable_how committed;
1717 * struct WRITE3resfail {
1718 * wcc_data file_wcc;
1721 * union WRITE3res switch (nfsstat3 status) {
1723 * WRITE3resok resok;
1725 * WRITE3resfail resfail;
1728 static int decode_write3resok(struct xdr_stream *xdr,
1729 struct nfs_writeres *result)
1733 p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE);
1734 if (unlikely(p == NULL))
1736 result->count = be32_to_cpup(p++);
1737 result->verf->committed = be32_to_cpup(p++);
1738 if (unlikely(result->verf->committed > NFS_FILE_SYNC))
1740 memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE);
1741 return result->count;
1743 dprintk("NFS: bad stable_how value: %u\n", result->verf->committed);
1746 print_overflow_msg(__func__, xdr);
1750 static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, __be32 *p,
1751 struct nfs_writeres *result)
1753 struct xdr_stream xdr;
1754 enum nfs_stat status;
1757 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1758 error = decode_nfsstat3(&xdr, &status);
1759 if (unlikely(error))
1761 error = decode_wcc_data(&xdr, result->fattr);
1762 if (unlikely(error))
1764 if (status != NFS3_OK)
1766 error = decode_write3resok(&xdr, result);
1770 return nfs_stat_to_errno(status);
1776 * struct CREATE3resok {
1778 * post_op_attr obj_attributes;
1782 * struct CREATE3resfail {
1786 * union CREATE3res switch (nfsstat3 status) {
1788 * CREATE3resok resok;
1790 * CREATE3resfail resfail;
1793 static int decode_create3resok(struct xdr_stream *xdr,
1794 struct nfs3_diropres *result)
1798 error = decode_post_op_fh3(xdr, result->fh);
1799 if (unlikely(error))
1801 error = decode_post_op_attr(xdr, result->fattr);
1802 if (unlikely(error))
1804 /* The server isn't required to return a file handle.
1805 * If it didn't, force the client to perform a LOOKUP
1806 * to determine the correct file handle and attribute
1807 * values for the new object. */
1808 if (result->fh->size == 0)
1809 result->fattr->valid = 0;
1810 error = decode_wcc_data(xdr, result->dir_attr);
1815 static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, __be32 *p,
1816 struct nfs3_diropres *result)
1818 struct xdr_stream xdr;
1819 enum nfs_stat status;
1822 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1823 error = decode_nfsstat3(&xdr, &status);
1824 if (unlikely(error))
1826 if (status != NFS3_OK)
1828 error = decode_create3resok(&xdr, result);
1832 error = decode_wcc_data(&xdr, result->dir_attr);
1833 if (unlikely(error))
1835 return nfs_stat_to_errno(status);
1841 * struct REMOVE3resok {
1845 * struct REMOVE3resfail {
1849 * union REMOVE3res switch (nfsstat3 status) {
1851 * REMOVE3resok resok;
1853 * REMOVE3resfail resfail;
1856 static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, __be32 *p,
1857 struct nfs_removeres *result)
1859 struct xdr_stream xdr;
1860 enum nfs_stat status;
1863 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1864 error = decode_nfsstat3(&xdr, &status);
1865 if (unlikely(error))
1867 error = decode_wcc_data(&xdr, result->dir_attr);
1868 if (unlikely(error))
1870 if (status != NFS3_OK)
1875 return nfs_stat_to_errno(status);
1881 * struct RENAME3resok {
1882 * wcc_data fromdir_wcc;
1883 * wcc_data todir_wcc;
1886 * struct RENAME3resfail {
1887 * wcc_data fromdir_wcc;
1888 * wcc_data todir_wcc;
1891 * union RENAME3res switch (nfsstat3 status) {
1893 * RENAME3resok resok;
1895 * RENAME3resfail resfail;
1898 static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, __be32 *p,
1899 struct nfs_renameres *result)
1901 struct xdr_stream xdr;
1902 enum nfs_stat status;
1905 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1906 error = decode_nfsstat3(&xdr, &status);
1907 if (unlikely(error))
1909 error = decode_wcc_data(&xdr, result->old_fattr);
1910 if (unlikely(error))
1912 error = decode_wcc_data(&xdr, result->new_fattr);
1913 if (unlikely(error))
1915 if (status != NFS3_OK)
1920 return nfs_stat_to_errno(status);
1926 * struct LINK3resok {
1927 * post_op_attr file_attributes;
1928 * wcc_data linkdir_wcc;
1931 * struct LINK3resfail {
1932 * post_op_attr file_attributes;
1933 * wcc_data linkdir_wcc;
1936 * union LINK3res switch (nfsstat3 status) {
1940 * LINK3resfail resfail;
1943 static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, __be32 *p,
1944 struct nfs3_linkres *result)
1946 struct xdr_stream xdr;
1947 enum nfs_stat status;
1950 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
1951 error = decode_nfsstat3(&xdr, &status);
1952 if (unlikely(error))
1954 error = decode_post_op_attr(&xdr, result->fattr);
1955 if (unlikely(error))
1957 error = decode_wcc_data(&xdr, result->dir_attr);
1958 if (unlikely(error))
1960 if (status != NFS3_OK)
1965 return nfs_stat_to_errno(status);
1969 * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in
1970 * the local page cache
1971 * @xdr: XDR stream where entry resides
1972 * @entry: buffer to fill in with entry data
1973 * @server: nfs_server data for this directory
1974 * @plus: boolean indicating whether this should be a readdirplus entry
1976 * Returns the position of the next item in the buffer, or an ERR_PTR.
1978 * This function is not invoked during READDIR reply decoding, but
1979 * rather whenever an application invokes the getdents(2) system call
1980 * on a directory already in our cache.
1988 * fhandle3 filehandle;
1989 * post_op_attr3 attributes;
1990 * entry3 *nextentry;
1994 * struct entryplus3 {
1998 * post_op_attr name_attributes;
1999 * post_op_fh3 name_handle;
2000 * entryplus3 *nextentry;
2003 __be32 *nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
2004 struct nfs_server *server, int plus)
2006 struct nfs_entry old = *entry;
2010 p = xdr_inline_decode(xdr, 4);
2011 if (unlikely(p == NULL))
2013 if (*p == xdr_zero) {
2014 p = xdr_inline_decode(xdr, 4);
2015 if (unlikely(p == NULL))
2018 return ERR_PTR(-EAGAIN);
2020 return ERR_PTR(-EBADCOOKIE);
2023 error = decode_fileid3(xdr, &entry->ino);
2024 if (unlikely(error))
2025 return ERR_PTR(error);
2027 error = decode_inline_filename3(xdr, &entry->name, &entry->len);
2028 if (unlikely(error))
2029 return ERR_PTR(error);
2031 entry->prev_cookie = entry->cookie;
2032 error = decode_cookie3(xdr, &entry->cookie);
2033 if (unlikely(error))
2034 return ERR_PTR(error);
2036 entry->d_type = DT_UNKNOWN;
2039 entry->fattr->valid = 0;
2040 error = decode_post_op_attr(xdr, entry->fattr);
2041 if (unlikely(error))
2042 return ERR_PTR(error);
2043 if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
2044 entry->d_type = nfs_umode_to_dtype(entry->fattr->mode);
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)
2055 return ERR_PTR(error);
2058 zero_nfs_fh3(entry->fh);
2061 /* Peek at the next entry to see if we're at EOD */
2062 p = xdr_inline_peek(xdr, 4 + 4);
2065 entry->eof = (p[0] == xdr_zero) && (p[1] != xdr_zero);
2069 print_overflow_msg(__func__, xdr);
2070 return ERR_PTR(-EAGAIN);
2072 dprintk("NFS: directory entry contains invalid file handle\n");
2074 return ERR_PTR(-EAGAIN);
2078 * 3.3.16 READDIR3res
2085 * struct READDIR3resok {
2086 * post_op_attr dir_attributes;
2087 * cookieverf3 cookieverf;
2091 * struct READDIR3resfail {
2092 * post_op_attr dir_attributes;
2095 * union READDIR3res switch (nfsstat3 status) {
2097 * READDIR3resok resok;
2099 * READDIR3resfail resfail;
2102 * Read the directory contents into the page cache, but otherwise
2103 * don't touch them. The actual decoding is done by nfs3_decode_entry()
2104 * during subsequent nfs_readdir() calls.
2106 static int decode_dirlist3(struct xdr_stream *xdr)
2111 pglen = xdr->buf->page_len;
2112 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
2113 recvd = xdr->buf->len - hdrlen;
2114 if (unlikely(pglen > recvd))
2117 xdr_read_pages(xdr, pglen);
2120 dprintk("NFS: server cheating in readdir result: "
2121 "pglen %u > recvd %u\n", pglen, recvd);
2126 static int decode_readdir3resok(struct xdr_stream *xdr,
2127 struct nfs3_readdirres *result)
2131 error = decode_post_op_attr(xdr, result->dir_attr);
2132 if (unlikely(error))
2134 /* XXX: do we need to check if result->verf != NULL ? */
2135 error = decode_cookieverf3(xdr, result->verf);
2136 if (unlikely(error))
2138 error = decode_dirlist3(xdr);
2143 static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, __be32 *p,
2144 struct nfs3_readdirres *result)
2146 struct xdr_stream xdr;
2147 enum nfs_stat status;
2150 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
2151 error = decode_nfsstat3(&xdr, &status);
2152 if (unlikely(error))
2154 if (status != NFS3_OK)
2156 error = decode_readdir3resok(&xdr, result);
2160 error = decode_post_op_attr(&xdr, result->dir_attr);
2161 if (unlikely(error))
2163 return nfs_stat_to_errno(status);
2169 * struct FSSTAT3resok {
2170 * post_op_attr obj_attributes;
2180 * struct FSSTAT3resfail {
2181 * post_op_attr obj_attributes;
2184 * union FSSTAT3res switch (nfsstat3 status) {
2186 * FSSTAT3resok resok;
2188 * FSSTAT3resfail resfail;
2191 static int decode_fsstat3resok(struct xdr_stream *xdr,
2192 struct nfs_fsstat *result)
2196 p = xdr_inline_decode(xdr, 8 * 6 + 4);
2197 if (unlikely(p == NULL))
2199 p = xdr_decode_size3(p, &result->tbytes);
2200 p = xdr_decode_size3(p, &result->fbytes);
2201 p = xdr_decode_size3(p, &result->abytes);
2202 p = xdr_decode_size3(p, &result->tfiles);
2203 p = xdr_decode_size3(p, &result->ffiles);
2204 xdr_decode_size3(p, &result->afiles);
2205 /* ignore invarsec */
2208 print_overflow_msg(__func__, xdr);
2212 static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, __be32 *p,
2213 struct nfs_fsstat *result)
2215 struct xdr_stream xdr;
2216 enum nfs_stat status;
2219 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
2220 error = decode_nfsstat3(&xdr, &status);
2221 if (unlikely(error))
2223 error = decode_post_op_attr(&xdr, result->fattr);
2224 if (unlikely(error))
2226 if (status != NFS3_OK)
2228 error = decode_fsstat3resok(&xdr, result);
2232 return nfs_stat_to_errno(status);
2238 * struct FSINFO3resok {
2239 * post_op_attr obj_attributes;
2247 * size3 maxfilesize;
2248 * nfstime3 time_delta;
2249 * uint32 properties;
2252 * struct FSINFO3resfail {
2253 * post_op_attr obj_attributes;
2256 * union FSINFO3res switch (nfsstat3 status) {
2258 * FSINFO3resok resok;
2260 * FSINFO3resfail resfail;
2263 static int decode_fsinfo3resok(struct xdr_stream *xdr,
2264 struct nfs_fsinfo *result)
2268 p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4);
2269 if (unlikely(p == NULL))
2271 result->rtmax = be32_to_cpup(p++);
2272 result->rtpref = be32_to_cpup(p++);
2273 result->rtmult = be32_to_cpup(p++);
2274 result->wtmax = be32_to_cpup(p++);
2275 result->wtpref = be32_to_cpup(p++);
2276 result->wtmult = be32_to_cpup(p++);
2277 result->dtpref = be32_to_cpup(p++);
2278 p = xdr_decode_size3(p, &result->maxfilesize);
2279 xdr_decode_nfstime3(p, &result->time_delta);
2281 /* ignore properties */
2282 result->lease_time = 0;
2285 print_overflow_msg(__func__, xdr);
2289 static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, __be32 *p,
2290 struct nfs_fsinfo *result)
2292 struct xdr_stream xdr;
2293 enum nfs_stat status;
2296 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
2297 error = decode_nfsstat3(&xdr, &status);
2298 if (unlikely(error))
2300 error = decode_post_op_attr(&xdr, result->fattr);
2301 if (unlikely(error))
2303 if (status != NFS3_OK)
2305 error = decode_fsinfo3resok(&xdr, result);
2309 return nfs_stat_to_errno(status);
2313 * 3.3.20 PATHCONF3res
2315 * struct PATHCONF3resok {
2316 * post_op_attr obj_attributes;
2320 * bool chown_restricted;
2321 * bool case_insensitive;
2322 * bool case_preserving;
2325 * struct PATHCONF3resfail {
2326 * post_op_attr obj_attributes;
2329 * union PATHCONF3res switch (nfsstat3 status) {
2331 * PATHCONF3resok resok;
2333 * PATHCONF3resfail resfail;
2336 static int decode_pathconf3resok(struct xdr_stream *xdr,
2337 struct nfs_pathconf *result)
2341 p = xdr_inline_decode(xdr, 4 * 6);
2342 if (unlikely(p == NULL))
2344 result->max_link = be32_to_cpup(p++);
2345 result->max_namelen = be32_to_cpup(p);
2346 /* ignore remaining fields */
2349 print_overflow_msg(__func__, xdr);
2353 static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, __be32 *p,
2354 struct nfs_pathconf *result)
2356 struct xdr_stream xdr;
2357 enum nfs_stat status;
2360 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
2361 error = decode_nfsstat3(&xdr, &status);
2362 if (unlikely(error))
2364 error = decode_post_op_attr(&xdr, result->fattr);
2365 if (unlikely(error))
2367 if (status != NFS3_OK)
2369 error = decode_pathconf3resok(&xdr, result);
2373 return nfs_stat_to_errno(status);
2379 * struct COMMIT3resok {
2380 * wcc_data file_wcc;
2384 * struct COMMIT3resfail {
2385 * wcc_data file_wcc;
2388 * union COMMIT3res switch (nfsstat3 status) {
2390 * COMMIT3resok resok;
2392 * COMMIT3resfail resfail;
2395 static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, __be32 *p,
2396 struct nfs_writeres *result)
2398 struct xdr_stream xdr;
2399 enum nfs_stat status;
2402 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
2403 error = decode_nfsstat3(&xdr, &status);
2404 if (unlikely(error))
2406 error = decode_wcc_data(&xdr, result->fattr);
2407 if (unlikely(error))
2409 if (status != NFS3_OK)
2411 error = decode_writeverf3(&xdr, result->verf->verifier);
2415 return nfs_stat_to_errno(status);
2418 #ifdef CONFIG_NFS_V3_ACL
2420 static inline int decode_getacl3resok(struct xdr_stream *xdr,
2421 struct nfs3_getaclres *result)
2423 struct posix_acl **acl;
2424 unsigned int *aclcnt;
2428 error = decode_post_op_attr(xdr, result->fattr);
2429 if (unlikely(error))
2431 error = decode_uint32(xdr, &result->mask);
2432 if (unlikely(error))
2435 if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT))
2438 hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base;
2441 if (result->mask & NFS_ACL)
2442 acl = &result->acl_access;
2444 if (result->mask & NFS_ACLCNT)
2445 aclcnt = &result->acl_access_count;
2446 error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl);
2447 if (unlikely(error <= 0))
2451 if (result->mask & NFS_DFACL)
2452 acl = &result->acl_default;
2454 if (result->mask & NFS_DFACLCNT)
2455 aclcnt = &result->acl_default_count;
2456 error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl);
2457 if (unlikely(error <= 0))
2464 static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, __be32 *p,
2465 struct nfs3_getaclres *result)
2467 struct xdr_stream xdr;
2468 enum nfs_stat status;
2471 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
2472 error = decode_nfsstat3(&xdr, &status);
2473 if (unlikely(error))
2475 if (status != NFS3_OK)
2477 error = decode_getacl3resok(&xdr, result);
2481 return nfs_stat_to_errno(status);
2484 static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, __be32 *p,
2485 struct nfs_fattr *result)
2487 struct xdr_stream xdr;
2488 enum nfs_stat status;
2491 xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
2492 error = decode_nfsstat3(&xdr, &status);
2493 if (unlikely(error))
2495 if (status != NFS3_OK)
2497 error = decode_post_op_attr(&xdr, result);
2501 return nfs_stat_to_errno(status);
2504 #endif /* CONFIG_NFS_V3_ACL */
2506 #define PROC(proc, argtype, restype, timer) \
2507 [NFS3PROC_##proc] = { \
2508 .p_proc = NFS3PROC_##proc, \
2509 .p_encode = (kxdrproc_t)nfs3_xdr_enc_##argtype##3args, \
2510 .p_decode = (kxdrproc_t)nfs3_xdr_dec_##restype##3res, \
2511 .p_arglen = NFS3_##argtype##args_sz, \
2512 .p_replen = NFS3_##restype##res_sz, \
2514 .p_statidx = NFS3PROC_##proc, \
2518 struct rpc_procinfo nfs3_procedures[] = {
2519 PROC(GETATTR, getattr, getattr, 1),
2520 PROC(SETATTR, setattr, setattr, 0),
2521 PROC(LOOKUP, lookup, lookup, 2),
2522 PROC(ACCESS, access, access, 1),
2523 PROC(READLINK, readlink, readlink, 3),
2524 PROC(READ, read, read, 3),
2525 PROC(WRITE, write, write, 4),
2526 PROC(CREATE, create, create, 0),
2527 PROC(MKDIR, mkdir, create, 0),
2528 PROC(SYMLINK, symlink, create, 0),
2529 PROC(MKNOD, mknod, create, 0),
2530 PROC(REMOVE, remove, remove, 0),
2531 PROC(RMDIR, lookup, setattr, 0),
2532 PROC(RENAME, rename, rename, 0),
2533 PROC(LINK, link, link, 0),
2534 PROC(READDIR, readdir, readdir, 3),
2535 PROC(READDIRPLUS, readdirplus, readdir, 3),
2536 PROC(FSSTAT, getattr, fsstat, 0),
2537 PROC(FSINFO, getattr, fsinfo, 0),
2538 PROC(PATHCONF, getattr, pathconf, 0),
2539 PROC(COMMIT, commit, commit, 5),
2542 struct rpc_version nfs_version3 = {
2544 .nrprocs = ARRAY_SIZE(nfs3_procedures),
2545 .procs = nfs3_procedures
2548 #ifdef CONFIG_NFS_V3_ACL
2549 static struct rpc_procinfo nfs3_acl_procedures[] = {
2550 [ACLPROC3_GETACL] = {
2551 .p_proc = ACLPROC3_GETACL,
2552 .p_encode = (kxdrproc_t)nfs3_xdr_enc_getacl3args,
2553 .p_decode = (kxdrproc_t)nfs3_xdr_dec_getacl3res,
2554 .p_arglen = ACL3_getaclargs_sz,
2555 .p_replen = ACL3_getaclres_sz,
2559 [ACLPROC3_SETACL] = {
2560 .p_proc = ACLPROC3_SETACL,
2561 .p_encode = (kxdrproc_t)nfs3_xdr_enc_setacl3args,
2562 .p_decode = (kxdrproc_t)nfs3_xdr_dec_setacl3res,
2563 .p_arglen = ACL3_setaclargs_sz,
2564 .p_replen = ACL3_setaclres_sz,
2570 struct rpc_version nfsacl_version3 = {
2572 .nrprocs = sizeof(nfs3_acl_procedures)/
2573 sizeof(nfs3_acl_procedures[0]),
2574 .procs = nfs3_acl_procedures,
2576 #endif /* CONFIG_NFS_V3_ACL */