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Commit | Line | Data |
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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Server-side XDR for NFSv4 |
3 | * | |
4 | * Copyright (c) 2002 The Regents of the University of Michigan. | |
5 | * All rights reserved. | |
6 | * | |
7 | * Kendrick Smith <kmsmith@umich.edu> | |
8 | * Andy Adamson <andros@umich.edu> | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions and the following disclaimer. | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in the | |
18 | * documentation and/or other materials provided with the distribution. | |
19 | * 3. Neither the name of the University nor the names of its | |
20 | * contributors may be used to endorse or promote products derived | |
21 | * from this software without specific prior written permission. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
1da177e4 LT |
34 | */ |
35 | ||
96bcad50 | 36 | #include <linux/file.h> |
5a0e3ad6 | 37 | #include <linux/slab.h> |
1da177e4 | 38 | #include <linux/namei.h> |
341eb184 | 39 | #include <linux/statfs.h> |
0733d213 | 40 | #include <linux/utsname.h> |
17456804 | 41 | #include <linux/pagemap.h> |
4796f457 | 42 | #include <linux/sunrpc/svcauth_gss.h> |
84e1b21d | 43 | #include <linux/sunrpc/addr.h> |
23e50fe3 FL |
44 | #include <linux/xattr.h> |
45 | #include <uapi/linux/xattr.h> | |
9a74af21 | 46 | |
2ca72e17 BF |
47 | #include "idmap.h" |
48 | #include "acl.h" | |
9a74af21 | 49 | #include "xdr4.h" |
0a3adade | 50 | #include "vfs.h" |
17456804 | 51 | #include "state.h" |
1091006c | 52 | #include "cache.h" |
3d733711 | 53 | #include "netns.h" |
9cf514cc | 54 | #include "pnfs.h" |
5c4583b2 | 55 | #include "filecache.h" |
2ca72e17 | 56 | |
08281341 CL |
57 | #include "trace.h" |
58 | ||
18032ca0 DQ |
59 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
60 | #include <linux/security.h> | |
61 | #endif | |
62 | ||
63 | ||
1da177e4 LT |
64 | #define NFSDDBG_FACILITY NFSDDBG_XDR |
65 | ||
5cf23dbb | 66 | const u32 nfsd_suppattrs[3][3] = { |
916d2d84 BF |
67 | {NFSD4_SUPPORTED_ATTRS_WORD0, |
68 | NFSD4_SUPPORTED_ATTRS_WORD1, | |
69 | NFSD4_SUPPORTED_ATTRS_WORD2}, | |
70 | ||
71 | {NFSD4_1_SUPPORTED_ATTRS_WORD0, | |
72 | NFSD4_1_SUPPORTED_ATTRS_WORD1, | |
73 | NFSD4_1_SUPPORTED_ATTRS_WORD2}, | |
74 | ||
75 | {NFSD4_1_SUPPORTED_ATTRS_WORD0, | |
76 | NFSD4_1_SUPPORTED_ATTRS_WORD1, | |
77 | NFSD4_2_SUPPORTED_ATTRS_WORD2}, | |
78 | }; | |
79 | ||
42ca0993 BF |
80 | /* |
81 | * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing | |
82 | * directory in order to indicate to the client that a filesystem boundary is present | |
83 | * We use a fixed fsid for a referral | |
84 | */ | |
85 | #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL | |
86 | #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL | |
87 | ||
b37ad28b | 88 | static __be32 |
a36b1725 | 89 | check_filename(char *str, int len) |
1da177e4 LT |
90 | { |
91 | int i; | |
92 | ||
93 | if (len == 0) | |
94 | return nfserr_inval; | |
000dfa18 CL |
95 | if (len > NFS4_MAXNAMLEN) |
96 | return nfserr_nametoolong; | |
1da177e4 | 97 | if (isdotent(str, len)) |
a36b1725 | 98 | return nfserr_badname; |
1da177e4 LT |
99 | for (i = 0; i < len; i++) |
100 | if (str[i] == '/') | |
a36b1725 | 101 | return nfserr_badname; |
1da177e4 LT |
102 | return 0; |
103 | } | |
104 | ||
60adfc50 AA |
105 | static int zero_clientid(clientid_t *clid) |
106 | { | |
107 | return (clid->cl_boot == 0) && (clid->cl_id == 0); | |
108 | } | |
109 | ||
2d8498db | 110 | /** |
d5e23383 | 111 | * svcxdr_tmpalloc - allocate memory to be freed after compound processing |
ce043ac8 | 112 | * @argp: NFSv4 compound argument structure |
ed992753 | 113 | * @len: length of buffer to allocate |
2d8498db | 114 | * |
ed992753 TM |
115 | * Allocates a buffer of size @len to be freed when processing the compound |
116 | * operation described in @argp finishes. | |
2d8498db | 117 | */ |
d5e23383 BF |
118 | static void * |
119 | svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) | |
1da177e4 | 120 | { |
d5e23383 | 121 | struct svcxdr_tmpbuf *tb; |
1da177e4 | 122 | |
d5e23383 | 123 | tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); |
1da177e4 | 124 | if (!tb) |
d5e23383 | 125 | return NULL; |
1da177e4 LT |
126 | tb->next = argp->to_free; |
127 | argp->to_free = tb; | |
d5e23383 | 128 | return tb->buf; |
1da177e4 LT |
129 | } |
130 | ||
29c353b3 BF |
131 | /* |
132 | * For xdr strings that need to be passed to other kernel api's | |
133 | * as null-terminated strings. | |
134 | * | |
135 | * Note null-terminating in place usually isn't safe since the | |
136 | * buffer might end on a page boundary. | |
137 | */ | |
138 | static char * | |
139 | svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) | |
140 | { | |
d5e23383 | 141 | char *p = svcxdr_tmpalloc(argp, len + 1); |
29c353b3 BF |
142 | |
143 | if (!p) | |
144 | return NULL; | |
145 | memcpy(p, buf, len); | |
146 | p[len] = '\0'; | |
29c353b3 | 147 | return p; |
1da177e4 LT |
148 | } |
149 | ||
7b723008 CL |
150 | static void * |
151 | svcxdr_savemem(struct nfsd4_compoundargs *argp, __be32 *p, u32 len) | |
152 | { | |
153 | __be32 *tmp; | |
154 | ||
155 | /* | |
156 | * The location of the decoded data item is stable, | |
157 | * so @p is OK to use. This is the common case. | |
158 | */ | |
159 | if (p != argp->xdr->scratch.iov_base) | |
160 | return p; | |
161 | ||
162 | tmp = svcxdr_tmpalloc(argp, len); | |
163 | if (!tmp) | |
164 | return NULL; | |
165 | memcpy(tmp, p, len); | |
166 | return tmp; | |
167 | } | |
168 | ||
5dcbfabb CL |
169 | /* |
170 | * NFSv4 basic data type decoders | |
171 | */ | |
172 | ||
1a994408 CL |
173 | /* |
174 | * This helper handles variable-length opaques which belong to protocol | |
175 | * elements that this implementation does not support. | |
176 | */ | |
177 | static __be32 | |
178 | nfsd4_decode_ignored_string(struct nfsd4_compoundargs *argp, u32 maxlen) | |
179 | { | |
180 | u32 len; | |
181 | ||
182 | if (xdr_stream_decode_u32(argp->xdr, &len) < 0) | |
183 | return nfserr_bad_xdr; | |
184 | if (maxlen && len > maxlen) | |
185 | return nfserr_bad_xdr; | |
186 | if (!xdr_inline_decode(argp->xdr, len)) | |
187 | return nfserr_bad_xdr; | |
188 | ||
189 | return nfs_ok; | |
190 | } | |
191 | ||
5dcbfabb CL |
192 | static __be32 |
193 | nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) | |
194 | { | |
195 | __be32 *p; | |
196 | u32 len; | |
197 | ||
198 | if (xdr_stream_decode_u32(argp->xdr, &len) < 0) | |
199 | return nfserr_bad_xdr; | |
200 | if (len == 0 || len > NFS4_OPAQUE_LIMIT) | |
201 | return nfserr_bad_xdr; | |
202 | p = xdr_inline_decode(argp->xdr, len); | |
203 | if (!p) | |
204 | return nfserr_bad_xdr; | |
7b723008 | 205 | o->data = svcxdr_savemem(argp, p, len); |
5dcbfabb CL |
206 | if (!o->data) |
207 | return nfserr_jukebox; | |
208 | o->len = len; | |
5dcbfabb CL |
209 | |
210 | return nfs_ok; | |
211 | } | |
212 | ||
000dfa18 CL |
213 | static __be32 |
214 | nfsd4_decode_component4(struct nfsd4_compoundargs *argp, char **namp, u32 *lenp) | |
215 | { | |
216 | __be32 *p, status; | |
217 | ||
218 | if (xdr_stream_decode_u32(argp->xdr, lenp) < 0) | |
219 | return nfserr_bad_xdr; | |
220 | p = xdr_inline_decode(argp->xdr, *lenp); | |
221 | if (!p) | |
222 | return nfserr_bad_xdr; | |
223 | status = check_filename((char *)p, *lenp); | |
224 | if (status) | |
225 | return status; | |
7b723008 | 226 | *namp = svcxdr_savemem(argp, p, *lenp); |
000dfa18 CL |
227 | if (!*namp) |
228 | return nfserr_jukebox; | |
000dfa18 CL |
229 | |
230 | return nfs_ok; | |
231 | } | |
232 | ||
1c3eff7e CL |
233 | static __be32 |
234 | nfsd4_decode_nfstime4(struct nfsd4_compoundargs *argp, struct timespec64 *tv) | |
235 | { | |
236 | __be32 *p; | |
237 | ||
238 | p = xdr_inline_decode(argp->xdr, XDR_UNIT * 3); | |
239 | if (!p) | |
240 | return nfserr_bad_xdr; | |
241 | p = xdr_decode_hyper(p, &tv->tv_sec); | |
242 | tv->tv_nsec = be32_to_cpup(p++); | |
243 | if (tv->tv_nsec >= (u32)1000000000) | |
244 | return nfserr_inval; | |
245 | return nfs_ok; | |
246 | } | |
247 | ||
796dd1c6 CL |
248 | static __be32 |
249 | nfsd4_decode_verifier4(struct nfsd4_compoundargs *argp, nfs4_verifier *verf) | |
250 | { | |
251 | __be32 *p; | |
252 | ||
253 | p = xdr_inline_decode(argp->xdr, NFS4_VERIFIER_SIZE); | |
254 | if (!p) | |
255 | return nfserr_bad_xdr; | |
256 | memcpy(verf->data, p, sizeof(verf->data)); | |
257 | return nfs_ok; | |
258 | } | |
259 | ||
d1c263a0 CL |
260 | /** |
261 | * nfsd4_decode_bitmap4 - Decode an NFSv4 bitmap4 | |
262 | * @argp: NFSv4 compound argument structure | |
263 | * @bmval: pointer to an array of u32's to decode into | |
264 | * @bmlen: size of the @bmval array | |
265 | * | |
266 | * The server needs to return nfs_ok rather than nfserr_bad_xdr when | |
267 | * encountering bitmaps containing bits it does not recognize. This | |
268 | * includes bits in bitmap words past WORDn, where WORDn is the last | |
269 | * bitmap WORD the implementation currently supports. Thus we are | |
270 | * careful here to simply ignore bits in bitmap words that this | |
271 | * implementation has yet to support explicitly. | |
272 | * | |
273 | * Return values: | |
274 | * %nfs_ok: @bmval populated successfully | |
275 | * %nfserr_bad_xdr: the encoded bitmap was invalid | |
276 | */ | |
277 | static __be32 | |
278 | nfsd4_decode_bitmap4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen) | |
279 | { | |
280 | u32 i, count; | |
281 | __be32 *p; | |
282 | ||
283 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) | |
284 | return nfserr_bad_xdr; | |
285 | /* request sanity */ | |
286 | if (count > 1000) | |
287 | return nfserr_bad_xdr; | |
288 | p = xdr_inline_decode(argp->xdr, count << 2); | |
289 | if (!p) | |
290 | return nfserr_bad_xdr; | |
291 | i = 0; | |
292 | while (i < count) | |
293 | bmval[i++] = be32_to_cpup(p++); | |
294 | while (i < bmlen) | |
295 | bmval[i++] = 0; | |
296 | ||
297 | return nfs_ok; | |
298 | } | |
299 | ||
c941a968 CL |
300 | static __be32 |
301 | nfsd4_decode_nfsace4(struct nfsd4_compoundargs *argp, struct nfs4_ace *ace) | |
302 | { | |
303 | __be32 *p, status; | |
304 | u32 length; | |
305 | ||
306 | if (xdr_stream_decode_u32(argp->xdr, &ace->type) < 0) | |
307 | return nfserr_bad_xdr; | |
308 | if (xdr_stream_decode_u32(argp->xdr, &ace->flag) < 0) | |
309 | return nfserr_bad_xdr; | |
310 | if (xdr_stream_decode_u32(argp->xdr, &ace->access_mask) < 0) | |
311 | return nfserr_bad_xdr; | |
312 | ||
313 | if (xdr_stream_decode_u32(argp->xdr, &length) < 0) | |
314 | return nfserr_bad_xdr; | |
315 | p = xdr_inline_decode(argp->xdr, length); | |
316 | if (!p) | |
317 | return nfserr_bad_xdr; | |
318 | ace->whotype = nfs4_acl_get_whotype((char *)p, length); | |
319 | if (ace->whotype != NFS4_ACL_WHO_NAMED) | |
320 | status = nfs_ok; | |
321 | else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) | |
322 | status = nfsd_map_name_to_gid(argp->rqstp, | |
323 | (char *)p, length, &ace->who_gid); | |
324 | else | |
325 | status = nfsd_map_name_to_uid(argp->rqstp, | |
326 | (char *)p, length, &ace->who_uid); | |
327 | ||
328 | return status; | |
329 | } | |
330 | ||
331 | /* A counted array of nfsace4's */ | |
332 | static noinline __be32 | |
333 | nfsd4_decode_acl(struct nfsd4_compoundargs *argp, struct nfs4_acl **acl) | |
334 | { | |
335 | struct nfs4_ace *ace; | |
336 | __be32 status; | |
337 | u32 count; | |
338 | ||
339 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) | |
340 | return nfserr_bad_xdr; | |
341 | ||
342 | if (count > xdr_stream_remaining(argp->xdr) / 20) | |
343 | /* | |
344 | * Even with 4-byte names there wouldn't be | |
345 | * space for that many aces; something fishy is | |
346 | * going on: | |
347 | */ | |
348 | return nfserr_fbig; | |
349 | ||
350 | *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(count)); | |
351 | if (*acl == NULL) | |
352 | return nfserr_jukebox; | |
353 | ||
354 | (*acl)->naces = count; | |
355 | for (ace = (*acl)->aces; ace < (*acl)->aces + count; ace++) { | |
356 | status = nfsd4_decode_nfsace4(argp, ace); | |
357 | if (status) | |
358 | return status; | |
359 | } | |
360 | ||
361 | return nfs_ok; | |
362 | } | |
363 | ||
dabe9182 CL |
364 | static noinline __be32 |
365 | nfsd4_decode_security_label(struct nfsd4_compoundargs *argp, | |
366 | struct xdr_netobj *label) | |
367 | { | |
368 | u32 lfs, pi, length; | |
369 | __be32 *p; | |
370 | ||
371 | if (xdr_stream_decode_u32(argp->xdr, &lfs) < 0) | |
372 | return nfserr_bad_xdr; | |
373 | if (xdr_stream_decode_u32(argp->xdr, &pi) < 0) | |
374 | return nfserr_bad_xdr; | |
375 | ||
376 | if (xdr_stream_decode_u32(argp->xdr, &length) < 0) | |
377 | return nfserr_bad_xdr; | |
378 | if (length > NFS4_MAXLABELLEN) | |
379 | return nfserr_badlabel; | |
380 | p = xdr_inline_decode(argp->xdr, length); | |
381 | if (!p) | |
382 | return nfserr_bad_xdr; | |
383 | label->len = length; | |
384 | label->data = svcxdr_dupstr(argp, p, length); | |
385 | if (!label->data) | |
386 | return nfserr_jukebox; | |
387 | ||
388 | return nfs_ok; | |
389 | } | |
390 | ||
b37ad28b | 391 | static __be32 |
d1c263a0 CL |
392 | nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen, |
393 | struct iattr *iattr, struct nfs4_acl **acl, | |
394 | struct xdr_netobj *label, int *umask) | |
1da177e4 | 395 | { |
081d53fe CL |
396 | unsigned int starting_pos; |
397 | u32 attrlist4_count; | |
d1c263a0 | 398 | __be32 *p, status; |
1da177e4 | 399 | |
1da177e4 | 400 | iattr->ia_valid = 0; |
d1c263a0 CL |
401 | status = nfsd4_decode_bitmap4(argp, bmval, bmlen); |
402 | if (status) | |
403 | return nfserr_bad_xdr; | |
1da177e4 | 404 | |
e864c189 BF |
405 | if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 |
406 | || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 | |
407 | || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) { | |
408 | if (nfsd_attrs_supported(argp->minorversion, bmval)) | |
409 | return nfserr_inval; | |
410 | return nfserr_attrnotsupp; | |
411 | } | |
412 | ||
081d53fe CL |
413 | if (xdr_stream_decode_u32(argp->xdr, &attrlist4_count) < 0) |
414 | return nfserr_bad_xdr; | |
415 | starting_pos = xdr_stream_pos(argp->xdr); | |
1da177e4 LT |
416 | |
417 | if (bmval[0] & FATTR4_WORD0_SIZE) { | |
2ac1b9b2 CL |
418 | u64 size; |
419 | ||
420 | if (xdr_stream_decode_u64(argp->xdr, &size) < 0) | |
421 | return nfserr_bad_xdr; | |
422 | iattr->ia_size = size; | |
1da177e4 LT |
423 | iattr->ia_valid |= ATTR_SIZE; |
424 | } | |
425 | if (bmval[0] & FATTR4_WORD0_ACL) { | |
c941a968 CL |
426 | status = nfsd4_decode_acl(argp, acl); |
427 | if (status) | |
428 | return status; | |
1da177e4 LT |
429 | } else |
430 | *acl = NULL; | |
431 | if (bmval[1] & FATTR4_WORD1_MODE) { | |
1c8f0ad7 CL |
432 | u32 mode; |
433 | ||
434 | if (xdr_stream_decode_u32(argp->xdr, &mode) < 0) | |
435 | return nfserr_bad_xdr; | |
436 | iattr->ia_mode = mode; | |
1da177e4 LT |
437 | iattr->ia_mode &= (S_IFMT | S_IALLUGO); |
438 | iattr->ia_valid |= ATTR_MODE; | |
439 | } | |
440 | if (bmval[1] & FATTR4_WORD1_OWNER) { | |
9853a5ac CL |
441 | u32 length; |
442 | ||
443 | if (xdr_stream_decode_u32(argp->xdr, &length) < 0) | |
444 | return nfserr_bad_xdr; | |
445 | p = xdr_inline_decode(argp->xdr, length); | |
446 | if (!p) | |
447 | return nfserr_bad_xdr; | |
448 | status = nfsd_map_name_to_uid(argp->rqstp, (char *)p, length, | |
449 | &iattr->ia_uid); | |
450 | if (status) | |
47c85291 | 451 | return status; |
1da177e4 LT |
452 | iattr->ia_valid |= ATTR_UID; |
453 | } | |
454 | if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { | |
393c31dd CL |
455 | u32 length; |
456 | ||
457 | if (xdr_stream_decode_u32(argp->xdr, &length) < 0) | |
458 | return nfserr_bad_xdr; | |
459 | p = xdr_inline_decode(argp->xdr, length); | |
460 | if (!p) | |
461 | return nfserr_bad_xdr; | |
462 | status = nfsd_map_name_to_gid(argp->rqstp, (char *)p, length, | |
463 | &iattr->ia_gid); | |
464 | if (status) | |
47c85291 | 465 | return status; |
1da177e4 LT |
466 | iattr->ia_valid |= ATTR_GID; |
467 | } | |
468 | if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { | |
1c3eff7e CL |
469 | u32 set_it; |
470 | ||
471 | if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) | |
472 | return nfserr_bad_xdr; | |
473 | switch (set_it) { | |
1da177e4 | 474 | case NFS4_SET_TO_CLIENT_TIME: |
1c3eff7e | 475 | status = nfsd4_decode_nfstime4(argp, &iattr->ia_atime); |
4c94e13e CH |
476 | if (status) |
477 | return status; | |
1da177e4 LT |
478 | iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); |
479 | break; | |
480 | case NFS4_SET_TO_SERVER_TIME: | |
481 | iattr->ia_valid |= ATTR_ATIME; | |
482 | break; | |
483 | default: | |
1c3eff7e | 484 | return nfserr_bad_xdr; |
1da177e4 LT |
485 | } |
486 | } | |
1da177e4 | 487 | if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { |
1c3eff7e CL |
488 | u32 set_it; |
489 | ||
490 | if (xdr_stream_decode_u32(argp->xdr, &set_it) < 0) | |
491 | return nfserr_bad_xdr; | |
492 | switch (set_it) { | |
1da177e4 | 493 | case NFS4_SET_TO_CLIENT_TIME: |
1c3eff7e | 494 | status = nfsd4_decode_nfstime4(argp, &iattr->ia_mtime); |
4c94e13e CH |
495 | if (status) |
496 | return status; | |
1da177e4 LT |
497 | iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); |
498 | break; | |
499 | case NFS4_SET_TO_SERVER_TIME: | |
500 | iattr->ia_valid |= ATTR_MTIME; | |
501 | break; | |
502 | default: | |
1c3eff7e | 503 | return nfserr_bad_xdr; |
1da177e4 LT |
504 | } |
505 | } | |
18032ca0 | 506 | label->len = 0; |
2285ae76 AB |
507 | if (IS_ENABLED(CONFIG_NFSD_V4_SECURITY_LABEL) && |
508 | bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { | |
dabe9182 CL |
509 | status = nfsd4_decode_security_label(argp, label); |
510 | if (status) | |
511 | return status; | |
18032ca0 | 512 | } |
47057abd | 513 | if (bmval[2] & FATTR4_WORD2_MODE_UMASK) { |
66f0476c CL |
514 | u32 mode, mask; |
515 | ||
47057abd | 516 | if (!umask) |
66f0476c CL |
517 | return nfserr_bad_xdr; |
518 | if (xdr_stream_decode_u32(argp->xdr, &mode) < 0) | |
519 | return nfserr_bad_xdr; | |
520 | iattr->ia_mode = mode & (S_IFMT | S_IALLUGO); | |
521 | if (xdr_stream_decode_u32(argp->xdr, &mask) < 0) | |
522 | return nfserr_bad_xdr; | |
523 | *umask = mask & S_IRWXUGO; | |
47057abd AG |
524 | iattr->ia_valid |= ATTR_MODE; |
525 | } | |
081d53fe CL |
526 | |
527 | /* request sanity: did attrlist4 contain the expected number of words? */ | |
528 | if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos) | |
529 | return nfserr_bad_xdr; | |
1da177e4 | 530 | |
d1c263a0 | 531 | return nfs_ok; |
1da177e4 LT |
532 | } |
533 | ||
d3d2f381 CL |
534 | static __be32 |
535 | nfsd4_decode_stateid4(struct nfsd4_compoundargs *argp, stateid_t *sid) | |
536 | { | |
537 | __be32 *p; | |
538 | ||
539 | p = xdr_inline_decode(argp->xdr, NFS4_STATEID_SIZE); | |
540 | if (!p) | |
541 | return nfserr_bad_xdr; | |
542 | sid->si_generation = be32_to_cpup(p++); | |
543 | memcpy(&sid->si_opaque, p, sizeof(sid->si_opaque)); | |
544 | return nfs_ok; | |
545 | } | |
546 | ||
144e8269 CL |
547 | static __be32 |
548 | nfsd4_decode_clientid4(struct nfsd4_compoundargs *argp, clientid_t *clientid) | |
549 | { | |
550 | __be32 *p; | |
551 | ||
552 | p = xdr_inline_decode(argp->xdr, sizeof(__be64)); | |
553 | if (!p) | |
554 | return nfserr_bad_xdr; | |
555 | memcpy(clientid, p, sizeof(*clientid)); | |
556 | return nfs_ok; | |
557 | } | |
558 | ||
559 | static __be32 | |
560 | nfsd4_decode_state_owner4(struct nfsd4_compoundargs *argp, | |
561 | clientid_t *clientid, struct xdr_netobj *owner) | |
562 | { | |
563 | __be32 status; | |
564 | ||
565 | status = nfsd4_decode_clientid4(argp, clientid); | |
566 | if (status) | |
567 | return status; | |
568 | return nfsd4_decode_opaque(argp, owner); | |
569 | } | |
570 | ||
04495971 CL |
571 | #ifdef CONFIG_NFSD_PNFS |
572 | static __be32 | |
573 | nfsd4_decode_deviceid4(struct nfsd4_compoundargs *argp, | |
574 | struct nfsd4_deviceid *devid) | |
575 | { | |
576 | __be32 *p; | |
577 | ||
578 | p = xdr_inline_decode(argp->xdr, NFS4_DEVICEID4_SIZE); | |
579 | if (!p) | |
580 | return nfserr_bad_xdr; | |
581 | memcpy(devid, p, sizeof(*devid)); | |
582 | return nfs_ok; | |
583 | } | |
5185980d CL |
584 | |
585 | static __be32 | |
586 | nfsd4_decode_layoutupdate4(struct nfsd4_compoundargs *argp, | |
587 | struct nfsd4_layoutcommit *lcp) | |
588 | { | |
589 | if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_layout_type) < 0) | |
590 | return nfserr_bad_xdr; | |
591 | if (lcp->lc_layout_type < LAYOUT_NFSV4_1_FILES) | |
592 | return nfserr_bad_xdr; | |
593 | if (lcp->lc_layout_type >= LAYOUT_TYPE_MAX) | |
594 | return nfserr_bad_xdr; | |
595 | ||
596 | if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_up_len) < 0) | |
597 | return nfserr_bad_xdr; | |
598 | if (lcp->lc_up_len > 0) { | |
599 | lcp->lc_up_layout = xdr_inline_decode(argp->xdr, lcp->lc_up_len); | |
600 | if (!lcp->lc_up_layout) | |
601 | return nfserr_bad_xdr; | |
602 | } | |
603 | ||
604 | return nfs_ok; | |
605 | } | |
606 | ||
645fcad3 CL |
607 | static __be32 |
608 | nfsd4_decode_layoutreturn4(struct nfsd4_compoundargs *argp, | |
609 | struct nfsd4_layoutreturn *lrp) | |
610 | { | |
611 | __be32 status; | |
612 | ||
613 | if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_return_type) < 0) | |
614 | return nfserr_bad_xdr; | |
615 | switch (lrp->lr_return_type) { | |
616 | case RETURN_FILE: | |
617 | if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.offset) < 0) | |
618 | return nfserr_bad_xdr; | |
619 | if (xdr_stream_decode_u64(argp->xdr, &lrp->lr_seg.length) < 0) | |
620 | return nfserr_bad_xdr; | |
621 | status = nfsd4_decode_stateid4(argp, &lrp->lr_sid); | |
622 | if (status) | |
623 | return status; | |
624 | if (xdr_stream_decode_u32(argp->xdr, &lrp->lrf_body_len) < 0) | |
625 | return nfserr_bad_xdr; | |
626 | if (lrp->lrf_body_len > 0) { | |
627 | lrp->lrf_body = xdr_inline_decode(argp->xdr, lrp->lrf_body_len); | |
628 | if (!lrp->lrf_body) | |
629 | return nfserr_bad_xdr; | |
630 | } | |
631 | break; | |
632 | case RETURN_FSID: | |
633 | case RETURN_ALL: | |
634 | lrp->lr_seg.offset = 0; | |
635 | lrp->lr_seg.length = NFS4_MAX_UINT64; | |
636 | break; | |
637 | default: | |
638 | return nfserr_bad_xdr; | |
639 | } | |
640 | ||
641 | return nfs_ok; | |
642 | } | |
643 | ||
04495971 CL |
644 | #endif /* CONFIG_NFSD_PNFS */ |
645 | ||
571e0451 CL |
646 | static __be32 |
647 | nfsd4_decode_sessionid4(struct nfsd4_compoundargs *argp, | |
648 | struct nfs4_sessionid *sessionid) | |
649 | { | |
650 | __be32 *p; | |
651 | ||
652 | p = xdr_inline_decode(argp->xdr, NFS4_MAX_SESSIONID_LEN); | |
653 | if (!p) | |
654 | return nfserr_bad_xdr; | |
655 | memcpy(sessionid->data, p, sizeof(sessionid->data)); | |
656 | return nfs_ok; | |
657 | } | |
658 | ||
1a994408 CL |
659 | /* Defined in Appendix A of RFC 5531 */ |
660 | static __be32 | |
661 | nfsd4_decode_authsys_parms(struct nfsd4_compoundargs *argp, | |
662 | struct nfsd4_cb_sec *cbs) | |
acb2887e | 663 | { |
1a994408 CL |
664 | u32 stamp, gidcount, uid, gid; |
665 | __be32 *p, status; | |
666 | ||
667 | if (xdr_stream_decode_u32(argp->xdr, &stamp) < 0) | |
668 | return nfserr_bad_xdr; | |
669 | /* machine name */ | |
670 | status = nfsd4_decode_ignored_string(argp, 255); | |
671 | if (status) | |
672 | return status; | |
673 | if (xdr_stream_decode_u32(argp->xdr, &uid) < 0) | |
674 | return nfserr_bad_xdr; | |
675 | if (xdr_stream_decode_u32(argp->xdr, &gid) < 0) | |
676 | return nfserr_bad_xdr; | |
677 | if (xdr_stream_decode_u32(argp->xdr, &gidcount) < 0) | |
678 | return nfserr_bad_xdr; | |
679 | if (gidcount > 16) | |
680 | return nfserr_bad_xdr; | |
681 | p = xdr_inline_decode(argp->xdr, gidcount << 2); | |
682 | if (!p) | |
683 | return nfserr_bad_xdr; | |
684 | if (cbs->flavor == (u32)(-1)) { | |
685 | struct user_namespace *userns = nfsd_user_namespace(argp->rqstp); | |
686 | ||
687 | kuid_t kuid = make_kuid(userns, uid); | |
688 | kgid_t kgid = make_kgid(userns, gid); | |
689 | if (uid_valid(kuid) && gid_valid(kgid)) { | |
690 | cbs->uid = kuid; | |
691 | cbs->gid = kgid; | |
692 | cbs->flavor = RPC_AUTH_UNIX; | |
693 | } else { | |
694 | dprintk("RPC_AUTH_UNIX with invalid uid or gid, ignoring!\n"); | |
695 | } | |
696 | } | |
697 | ||
698 | return nfs_ok; | |
699 | } | |
700 | ||
701 | static __be32 | |
702 | nfsd4_decode_gss_cb_handles4(struct nfsd4_compoundargs *argp, | |
703 | struct nfsd4_cb_sec *cbs) | |
704 | { | |
705 | __be32 status; | |
706 | u32 service; | |
707 | ||
708 | dprintk("RPC_AUTH_GSS callback secflavor not supported!\n"); | |
709 | ||
710 | if (xdr_stream_decode_u32(argp->xdr, &service) < 0) | |
711 | return nfserr_bad_xdr; | |
712 | if (service < RPC_GSS_SVC_NONE || service > RPC_GSS_SVC_PRIVACY) | |
713 | return nfserr_bad_xdr; | |
714 | /* gcbp_handle_from_server */ | |
715 | status = nfsd4_decode_ignored_string(argp, 0); | |
716 | if (status) | |
717 | return status; | |
718 | /* gcbp_handle_from_client */ | |
719 | status = nfsd4_decode_ignored_string(argp, 0); | |
720 | if (status) | |
721 | return status; | |
722 | ||
723 | return nfs_ok; | |
724 | } | |
725 | ||
726 | /* a counted array of callback_sec_parms4 items */ | |
727 | static __be32 | |
728 | nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) | |
729 | { | |
730 | u32 i, secflavor, nr_secflavs; | |
731 | __be32 status; | |
acb2887e BF |
732 | |
733 | /* callback_sec_params4 */ | |
1a994408 CL |
734 | if (xdr_stream_decode_u32(argp->xdr, &nr_secflavs) < 0) |
735 | return nfserr_bad_xdr; | |
57569a70 BF |
736 | if (nr_secflavs) |
737 | cbs->flavor = (u32)(-1); | |
738 | else | |
739 | /* Is this legal? Be generous, take it to mean AUTH_NONE: */ | |
740 | cbs->flavor = 0; | |
1a994408 | 741 | |
acb2887e | 742 | for (i = 0; i < nr_secflavs; ++i) { |
1a994408 CL |
743 | if (xdr_stream_decode_u32(argp->xdr, &secflavor) < 0) |
744 | return nfserr_bad_xdr; | |
745 | switch (secflavor) { | |
acb2887e | 746 | case RPC_AUTH_NULL: |
1a994408 | 747 | /* void */ |
12fc3e92 BF |
748 | if (cbs->flavor == (u32)(-1)) |
749 | cbs->flavor = RPC_AUTH_NULL; | |
acb2887e BF |
750 | break; |
751 | case RPC_AUTH_UNIX: | |
1a994408 CL |
752 | status = nfsd4_decode_authsys_parms(argp, cbs); |
753 | if (status) | |
754 | return status; | |
acb2887e BF |
755 | break; |
756 | case RPC_AUTH_GSS: | |
1a994408 CL |
757 | status = nfsd4_decode_gss_cb_handles4(argp, cbs); |
758 | if (status) | |
759 | return status; | |
acb2887e BF |
760 | break; |
761 | default: | |
acb2887e BF |
762 | return nfserr_inval; |
763 | } | |
764 | } | |
1a994408 CL |
765 | |
766 | return nfs_ok; | |
acb2887e BF |
767 | } |
768 | ||
1a994408 | 769 | |
d169a6a9 CL |
770 | /* |
771 | * NFSv4 operation argument decoders | |
772 | */ | |
773 | ||
774 | static __be32 | |
775 | nfsd4_decode_access(struct nfsd4_compoundargs *argp, | |
776 | struct nfsd4_access *access) | |
777 | { | |
778 | if (xdr_stream_decode_u32(argp->xdr, &access->ac_req_access) < 0) | |
779 | return nfserr_bad_xdr; | |
780 | return nfs_ok; | |
781 | } | |
782 | ||
b37ad28b | 783 | static __be32 |
1da177e4 LT |
784 | nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) |
785 | { | |
d3d2f381 CL |
786 | if (xdr_stream_decode_u32(argp->xdr, &close->cl_seqid) < 0) |
787 | return nfserr_bad_xdr; | |
788 | return nfsd4_decode_stateid4(argp, &close->cl_stateid); | |
1da177e4 LT |
789 | } |
790 | ||
791 | ||
b37ad28b | 792 | static __be32 |
1da177e4 LT |
793 | nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) |
794 | { | |
cbd9abb3 CL |
795 | if (xdr_stream_decode_u64(argp->xdr, &commit->co_offset) < 0) |
796 | return nfserr_bad_xdr; | |
797 | if (xdr_stream_decode_u32(argp->xdr, &commit->co_count) < 0) | |
798 | return nfserr_bad_xdr; | |
799 | return nfs_ok; | |
1da177e4 LT |
800 | } |
801 | ||
b37ad28b | 802 | static __be32 |
1da177e4 LT |
803 | nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) |
804 | { | |
000dfa18 | 805 | __be32 *p, status; |
1da177e4 | 806 | |
000dfa18 CL |
807 | if (xdr_stream_decode_u32(argp->xdr, &create->cr_type) < 0) |
808 | return nfserr_bad_xdr; | |
1da177e4 LT |
809 | switch (create->cr_type) { |
810 | case NF4LNK: | |
000dfa18 CL |
811 | if (xdr_stream_decode_u32(argp->xdr, &create->cr_datalen) < 0) |
812 | return nfserr_bad_xdr; | |
813 | p = xdr_inline_decode(argp->xdr, create->cr_datalen); | |
814 | if (!p) | |
815 | return nfserr_bad_xdr; | |
29c353b3 | 816 | create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); |
7fb84306 | 817 | if (!create->cr_data) |
76f47128 | 818 | return nfserr_jukebox; |
1da177e4 LT |
819 | break; |
820 | case NF4BLK: | |
821 | case NF4CHR: | |
000dfa18 CL |
822 | if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata1) < 0) |
823 | return nfserr_bad_xdr; | |
824 | if (xdr_stream_decode_u32(argp->xdr, &create->cr_specdata2) < 0) | |
825 | return nfserr_bad_xdr; | |
1da177e4 LT |
826 | break; |
827 | case NF4SOCK: | |
828 | case NF4FIFO: | |
829 | case NF4DIR: | |
830 | default: | |
831 | break; | |
832 | } | |
000dfa18 CL |
833 | status = nfsd4_decode_component4(argp, &create->cr_name, |
834 | &create->cr_namelen); | |
835 | if (status) | |
1da177e4 | 836 | return status; |
d1c263a0 CL |
837 | status = nfsd4_decode_fattr4(argp, create->cr_bmval, |
838 | ARRAY_SIZE(create->cr_bmval), | |
839 | &create->cr_iattr, &create->cr_acl, | |
840 | &create->cr_label, &create->cr_umask); | |
c0d6fc8a | 841 | if (status) |
000dfa18 | 842 | return status; |
1da177e4 | 843 | |
000dfa18 | 844 | return nfs_ok; |
1da177e4 LT |
845 | } |
846 | ||
b37ad28b | 847 | static inline __be32 |
1da177e4 LT |
848 | nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) |
849 | { | |
95e6482c | 850 | return nfsd4_decode_stateid4(argp, &dr->dr_stateid); |
1da177e4 LT |
851 | } |
852 | ||
b37ad28b | 853 | static inline __be32 |
1da177e4 LT |
854 | nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) |
855 | { | |
f759eff2 CL |
856 | return nfsd4_decode_bitmap4(argp, getattr->ga_bmval, |
857 | ARRAY_SIZE(getattr->ga_bmval)); | |
1da177e4 LT |
858 | } |
859 | ||
b37ad28b | 860 | static __be32 |
1da177e4 LT |
861 | nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) |
862 | { | |
5c505d12 | 863 | return nfsd4_decode_component4(argp, &link->li_name, &link->li_namelen); |
1da177e4 LT |
864 | } |
865 | ||
8918cc0d CL |
866 | static __be32 |
867 | nfsd4_decode_open_to_lock_owner4(struct nfsd4_compoundargs *argp, | |
868 | struct nfsd4_lock *lock) | |
869 | { | |
870 | __be32 status; | |
871 | ||
872 | if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_open_seqid) < 0) | |
873 | return nfserr_bad_xdr; | |
874 | status = nfsd4_decode_stateid4(argp, &lock->lk_new_open_stateid); | |
875 | if (status) | |
876 | return status; | |
877 | if (xdr_stream_decode_u32(argp->xdr, &lock->lk_new_lock_seqid) < 0) | |
878 | return nfserr_bad_xdr; | |
879 | return nfsd4_decode_state_owner4(argp, &lock->lk_new_clientid, | |
880 | &lock->lk_new_owner); | |
881 | } | |
882 | ||
883 | static __be32 | |
884 | nfsd4_decode_exist_lock_owner4(struct nfsd4_compoundargs *argp, | |
885 | struct nfsd4_lock *lock) | |
886 | { | |
887 | __be32 status; | |
888 | ||
889 | status = nfsd4_decode_stateid4(argp, &lock->lk_old_lock_stateid); | |
890 | if (status) | |
891 | return status; | |
892 | if (xdr_stream_decode_u32(argp->xdr, &lock->lk_old_lock_seqid) < 0) | |
893 | return nfserr_bad_xdr; | |
894 | ||
895 | return nfs_ok; | |
896 | } | |
897 | ||
898 | static __be32 | |
899 | nfsd4_decode_locker4(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) | |
900 | { | |
901 | if (xdr_stream_decode_bool(argp->xdr, &lock->lk_is_new) < 0) | |
902 | return nfserr_bad_xdr; | |
903 | if (lock->lk_is_new) | |
904 | return nfsd4_decode_open_to_lock_owner4(argp, lock); | |
905 | return nfsd4_decode_exist_lock_owner4(argp, lock); | |
906 | } | |
907 | ||
b37ad28b | 908 | static __be32 |
1da177e4 LT |
909 | nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) |
910 | { | |
7c59deed CL |
911 | if (xdr_stream_decode_u32(argp->xdr, &lock->lk_type) < 0) |
912 | return nfserr_bad_xdr; | |
1da177e4 | 913 | if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) |
7c59deed CL |
914 | return nfserr_bad_xdr; |
915 | if (xdr_stream_decode_bool(argp->xdr, &lock->lk_reclaim) < 0) | |
916 | return nfserr_bad_xdr; | |
917 | if (xdr_stream_decode_u64(argp->xdr, &lock->lk_offset) < 0) | |
918 | return nfserr_bad_xdr; | |
919 | if (xdr_stream_decode_u64(argp->xdr, &lock->lk_length) < 0) | |
920 | return nfserr_bad_xdr; | |
921 | return nfsd4_decode_locker4(argp, lock); | |
1da177e4 LT |
922 | } |
923 | ||
b37ad28b | 924 | static __be32 |
1da177e4 LT |
925 | nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) |
926 | { | |
0a146f04 CL |
927 | if (xdr_stream_decode_u32(argp->xdr, &lockt->lt_type) < 0) |
928 | return nfserr_bad_xdr; | |
929 | if ((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) | |
930 | return nfserr_bad_xdr; | |
931 | if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_offset) < 0) | |
932 | return nfserr_bad_xdr; | |
933 | if (xdr_stream_decode_u64(argp->xdr, &lockt->lt_length) < 0) | |
934 | return nfserr_bad_xdr; | |
935 | return nfsd4_decode_state_owner4(argp, &lockt->lt_clientid, | |
936 | &lockt->lt_owner); | |
1da177e4 LT |
937 | } |
938 | ||
b37ad28b | 939 | static __be32 |
1da177e4 LT |
940 | nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) |
941 | { | |
ca9cf9fc | 942 | __be32 status; |
1da177e4 | 943 | |
ca9cf9fc CL |
944 | if (xdr_stream_decode_u32(argp->xdr, &locku->lu_type) < 0) |
945 | return nfserr_bad_xdr; | |
1da177e4 | 946 | if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) |
ca9cf9fc CL |
947 | return nfserr_bad_xdr; |
948 | if (xdr_stream_decode_u32(argp->xdr, &locku->lu_seqid) < 0) | |
949 | return nfserr_bad_xdr; | |
950 | status = nfsd4_decode_stateid4(argp, &locku->lu_stateid); | |
e31a1b66 BH |
951 | if (status) |
952 | return status; | |
ca9cf9fc CL |
953 | if (xdr_stream_decode_u64(argp->xdr, &locku->lu_offset) < 0) |
954 | return nfserr_bad_xdr; | |
955 | if (xdr_stream_decode_u64(argp->xdr, &locku->lu_length) < 0) | |
956 | return nfserr_bad_xdr; | |
1da177e4 | 957 | |
ca9cf9fc | 958 | return nfs_ok; |
1da177e4 LT |
959 | } |
960 | ||
b37ad28b | 961 | static __be32 |
1da177e4 LT |
962 | nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) |
963 | { | |
3d5877e8 | 964 | return nfsd4_decode_component4(argp, &lookup->lo_name, &lookup->lo_len); |
1da177e4 LT |
965 | } |
966 | ||
bf33bab3 CL |
967 | static __be32 |
968 | nfsd4_decode_createhow4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) | |
969 | { | |
970 | __be32 status; | |
971 | ||
972 | if (xdr_stream_decode_u32(argp->xdr, &open->op_createmode) < 0) | |
973 | return nfserr_bad_xdr; | |
974 | switch (open->op_createmode) { | |
975 | case NFS4_CREATE_UNCHECKED: | |
976 | case NFS4_CREATE_GUARDED: | |
977 | status = nfsd4_decode_fattr4(argp, open->op_bmval, | |
978 | ARRAY_SIZE(open->op_bmval), | |
979 | &open->op_iattr, &open->op_acl, | |
980 | &open->op_label, &open->op_umask); | |
981 | if (status) | |
982 | return status; | |
983 | break; | |
984 | case NFS4_CREATE_EXCLUSIVE: | |
985 | status = nfsd4_decode_verifier4(argp, &open->op_verf); | |
986 | if (status) | |
987 | return status; | |
988 | break; | |
989 | case NFS4_CREATE_EXCLUSIVE4_1: | |
990 | if (argp->minorversion < 1) | |
991 | return nfserr_bad_xdr; | |
992 | status = nfsd4_decode_verifier4(argp, &open->op_verf); | |
993 | if (status) | |
994 | return status; | |
995 | status = nfsd4_decode_fattr4(argp, open->op_bmval, | |
996 | ARRAY_SIZE(open->op_bmval), | |
997 | &open->op_iattr, &open->op_acl, | |
998 | &open->op_label, &open->op_umask); | |
999 | if (status) | |
1000 | return status; | |
1001 | break; | |
1002 | default: | |
1003 | return nfserr_bad_xdr; | |
1004 | } | |
1005 | ||
1006 | return nfs_ok; | |
1007 | } | |
1008 | ||
e6ec04b2 CL |
1009 | static __be32 |
1010 | nfsd4_decode_openflag4(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) | |
1011 | { | |
1012 | __be32 status; | |
1013 | ||
1014 | if (xdr_stream_decode_u32(argp->xdr, &open->op_create) < 0) | |
1015 | return nfserr_bad_xdr; | |
1016 | switch (open->op_create) { | |
1017 | case NFS4_OPEN_NOCREATE: | |
1018 | break; | |
1019 | case NFS4_OPEN_CREATE: | |
1020 | status = nfsd4_decode_createhow4(argp, open); | |
1021 | if (status) | |
1022 | return status; | |
1023 | break; | |
1024 | default: | |
1025 | return nfserr_bad_xdr; | |
1026 | } | |
1027 | ||
1028 | return nfs_ok; | |
1029 | } | |
1030 | ||
2c8bd7e0 | 1031 | static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) |
04f9e664 | 1032 | { |
04f9e664 BF |
1033 | u32 w; |
1034 | ||
9aa62f51 CL |
1035 | if (xdr_stream_decode_u32(argp->xdr, &w) < 0) |
1036 | return nfserr_bad_xdr; | |
2c8bd7e0 BH |
1037 | *share_access = w & NFS4_SHARE_ACCESS_MASK; |
1038 | *deleg_want = w & NFS4_SHARE_WANT_MASK; | |
1039 | if (deleg_when) | |
1040 | *deleg_when = w & NFS4_SHARE_WHEN_MASK; | |
1041 | ||
04f9e664 BF |
1042 | switch (w & NFS4_SHARE_ACCESS_MASK) { |
1043 | case NFS4_SHARE_ACCESS_READ: | |
1044 | case NFS4_SHARE_ACCESS_WRITE: | |
1045 | case NFS4_SHARE_ACCESS_BOTH: | |
1046 | break; | |
1047 | default: | |
1048 | return nfserr_bad_xdr; | |
1049 | } | |
fc0d14fe | 1050 | w &= ~NFS4_SHARE_ACCESS_MASK; |
04f9e664 BF |
1051 | if (!w) |
1052 | return nfs_ok; | |
1053 | if (!argp->minorversion) | |
1054 | return nfserr_bad_xdr; | |
1055 | switch (w & NFS4_SHARE_WANT_MASK) { | |
1056 | case NFS4_SHARE_WANT_NO_PREFERENCE: | |
1057 | case NFS4_SHARE_WANT_READ_DELEG: | |
1058 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
1059 | case NFS4_SHARE_WANT_ANY_DELEG: | |
1060 | case NFS4_SHARE_WANT_NO_DELEG: | |
1061 | case NFS4_SHARE_WANT_CANCEL: | |
1062 | break; | |
1063 | default: | |
1064 | return nfserr_bad_xdr; | |
1065 | } | |
92bac8c5 | 1066 | w &= ~NFS4_SHARE_WANT_MASK; |
04f9e664 BF |
1067 | if (!w) |
1068 | return nfs_ok; | |
2c8bd7e0 BH |
1069 | |
1070 | if (!deleg_when) /* open_downgrade */ | |
1071 | return nfserr_inval; | |
04f9e664 BF |
1072 | switch (w) { |
1073 | case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: | |
1074 | case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: | |
c668fc6d BH |
1075 | case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | |
1076 | NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): | |
04f9e664 BF |
1077 | return nfs_ok; |
1078 | } | |
04f9e664 BF |
1079 | return nfserr_bad_xdr; |
1080 | } | |
1081 | ||
1082 | static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) | |
1083 | { | |
b07bebd9 CL |
1084 | if (xdr_stream_decode_u32(argp->xdr, x) < 0) |
1085 | return nfserr_bad_xdr; | |
1086 | /* Note: unlike access bits, deny bits may be zero. */ | |
01cd4afa | 1087 | if (*x & ~NFS4_SHARE_DENY_BOTH) |
04f9e664 | 1088 | return nfserr_bad_xdr; |
b07bebd9 | 1089 | |
04f9e664 | 1090 | return nfs_ok; |
04f9e664 BF |
1091 | } |
1092 | ||
1708e50b CL |
1093 | static __be32 |
1094 | nfsd4_decode_open_claim4(struct nfsd4_compoundargs *argp, | |
1095 | struct nfsd4_open *open) | |
1096 | { | |
1097 | __be32 status; | |
1098 | ||
1099 | if (xdr_stream_decode_u32(argp->xdr, &open->op_claim_type) < 0) | |
1100 | return nfserr_bad_xdr; | |
1101 | switch (open->op_claim_type) { | |
1102 | case NFS4_OPEN_CLAIM_NULL: | |
1103 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: | |
1104 | status = nfsd4_decode_component4(argp, &open->op_fname, | |
1105 | &open->op_fnamelen); | |
1106 | if (status) | |
1107 | return status; | |
1108 | break; | |
1109 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1110 | if (xdr_stream_decode_u32(argp->xdr, &open->op_delegate_type) < 0) | |
1111 | return nfserr_bad_xdr; | |
1112 | break; | |
1113 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: | |
1114 | status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid); | |
1115 | if (status) | |
1116 | return status; | |
1117 | status = nfsd4_decode_component4(argp, &open->op_fname, | |
1118 | &open->op_fnamelen); | |
1119 | if (status) | |
1120 | return status; | |
1121 | break; | |
1122 | case NFS4_OPEN_CLAIM_FH: | |
1123 | case NFS4_OPEN_CLAIM_DELEG_PREV_FH: | |
1124 | if (argp->minorversion < 1) | |
1125 | return nfserr_bad_xdr; | |
1126 | /* void */ | |
1127 | break; | |
1128 | case NFS4_OPEN_CLAIM_DELEG_CUR_FH: | |
1129 | if (argp->minorversion < 1) | |
1130 | return nfserr_bad_xdr; | |
1131 | status = nfsd4_decode_stateid4(argp, &open->op_delegate_stateid); | |
1132 | if (status) | |
1133 | return status; | |
1134 | break; | |
1135 | default: | |
1136 | return nfserr_bad_xdr; | |
1137 | } | |
1138 | ||
1139 | return nfs_ok; | |
1140 | } | |
1141 | ||
b37ad28b | 1142 | static __be32 |
1da177e4 LT |
1143 | nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
1144 | { | |
61e5e0b3 | 1145 | __be32 status; |
2c8bd7e0 | 1146 | u32 dummy; |
1da177e4 LT |
1147 | |
1148 | memset(open->op_bmval, 0, sizeof(open->op_bmval)); | |
1149 | open->op_iattr.ia_valid = 0; | |
fe0750e5 | 1150 | open->op_openowner = NULL; |
1da177e4 | 1151 | |
9d313b17 | 1152 | open->op_xdr_error = 0; |
61e5e0b3 CL |
1153 | if (xdr_stream_decode_u32(argp->xdr, &open->op_seqid) < 0) |
1154 | return nfserr_bad_xdr; | |
1155 | /* deleg_want is ignored */ | |
2c8bd7e0 BH |
1156 | status = nfsd4_decode_share_access(argp, &open->op_share_access, |
1157 | &open->op_deleg_want, &dummy); | |
04f9e664 | 1158 | if (status) |
61e5e0b3 | 1159 | return status; |
04f9e664 BF |
1160 | status = nfsd4_decode_share_deny(argp, &open->op_share_deny); |
1161 | if (status) | |
61e5e0b3 CL |
1162 | return status; |
1163 | status = nfsd4_decode_state_owner4(argp, &open->op_clientid, | |
1164 | &open->op_owner); | |
a084daf5 | 1165 | if (status) |
61e5e0b3 | 1166 | return status; |
e6ec04b2 CL |
1167 | status = nfsd4_decode_openflag4(argp, open); |
1168 | if (status) | |
1169 | return status; | |
61e5e0b3 | 1170 | return nfsd4_decode_open_claim4(argp, open); |
1da177e4 LT |
1171 | } |
1172 | ||
b37ad28b | 1173 | static __be32 |
1da177e4 LT |
1174 | nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) |
1175 | { | |
06bee693 | 1176 | __be32 status; |
e1a90ebd AS |
1177 | |
1178 | if (argp->minorversion >= 1) | |
1179 | return nfserr_notsupp; | |
1180 | ||
06bee693 | 1181 | status = nfsd4_decode_stateid4(argp, &open_conf->oc_req_stateid); |
e31a1b66 BH |
1182 | if (status) |
1183 | return status; | |
06bee693 CL |
1184 | if (xdr_stream_decode_u32(argp->xdr, &open_conf->oc_seqid) < 0) |
1185 | return nfserr_bad_xdr; | |
e1a90ebd | 1186 | |
06bee693 | 1187 | return nfs_ok; |
1da177e4 LT |
1188 | } |
1189 | ||
b37ad28b | 1190 | static __be32 |
1da177e4 LT |
1191 | nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) |
1192 | { | |
dca71651 CL |
1193 | __be32 status; |
1194 | ||
1195 | status = nfsd4_decode_stateid4(argp, &open_down->od_stateid); | |
e31a1b66 BH |
1196 | if (status) |
1197 | return status; | |
dca71651 CL |
1198 | if (xdr_stream_decode_u32(argp->xdr, &open_down->od_seqid) < 0) |
1199 | return nfserr_bad_xdr; | |
1200 | /* deleg_want is ignored */ | |
2c8bd7e0 BH |
1201 | status = nfsd4_decode_share_access(argp, &open_down->od_share_access, |
1202 | &open_down->od_deleg_want, NULL); | |
04f9e664 BF |
1203 | if (status) |
1204 | return status; | |
dca71651 | 1205 | return nfsd4_decode_share_deny(argp, &open_down->od_share_deny); |
1da177e4 LT |
1206 | } |
1207 | ||
b37ad28b | 1208 | static __be32 |
1da177e4 LT |
1209 | nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) |
1210 | { | |
a73bed98 | 1211 | __be32 *p; |
1da177e4 | 1212 | |
a73bed98 CL |
1213 | if (xdr_stream_decode_u32(argp->xdr, &putfh->pf_fhlen) < 0) |
1214 | return nfserr_bad_xdr; | |
1da177e4 | 1215 | if (putfh->pf_fhlen > NFS4_FHSIZE) |
a73bed98 CL |
1216 | return nfserr_bad_xdr; |
1217 | p = xdr_inline_decode(argp->xdr, putfh->pf_fhlen); | |
1218 | if (!p) | |
1219 | return nfserr_bad_xdr; | |
7b723008 | 1220 | putfh->pf_fhval = svcxdr_savemem(argp, p, putfh->pf_fhlen); |
a73bed98 CL |
1221 | if (!putfh->pf_fhval) |
1222 | return nfserr_jukebox; | |
1da177e4 | 1223 | |
a73bed98 | 1224 | return nfs_ok; |
1da177e4 LT |
1225 | } |
1226 | ||
e1a90ebd AS |
1227 | static __be32 |
1228 | nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) | |
1229 | { | |
1230 | if (argp->minorversion == 0) | |
1231 | return nfs_ok; | |
1232 | return nfserr_notsupp; | |
1233 | } | |
1234 | ||
b37ad28b | 1235 | static __be32 |
1da177e4 LT |
1236 | nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) |
1237 | { | |
3909c3bc | 1238 | __be32 status; |
1da177e4 | 1239 | |
3909c3bc | 1240 | status = nfsd4_decode_stateid4(argp, &read->rd_stateid); |
e31a1b66 BH |
1241 | if (status) |
1242 | return status; | |
3909c3bc CL |
1243 | if (xdr_stream_decode_u64(argp->xdr, &read->rd_offset) < 0) |
1244 | return nfserr_bad_xdr; | |
1245 | if (xdr_stream_decode_u32(argp->xdr, &read->rd_length) < 0) | |
1246 | return nfserr_bad_xdr; | |
1da177e4 | 1247 | |
3909c3bc | 1248 | return nfs_ok; |
1da177e4 LT |
1249 | } |
1250 | ||
b37ad28b | 1251 | static __be32 |
1da177e4 LT |
1252 | nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) |
1253 | { | |
0dfaf2a3 | 1254 | __be32 status; |
1da177e4 | 1255 | |
0dfaf2a3 CL |
1256 | if (xdr_stream_decode_u64(argp->xdr, &readdir->rd_cookie) < 0) |
1257 | return nfserr_bad_xdr; | |
1258 | status = nfsd4_decode_verifier4(argp, &readdir->rd_verf); | |
1259 | if (status) | |
1260 | return status; | |
1261 | if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_dircount) < 0) | |
1262 | return nfserr_bad_xdr; | |
1263 | if (xdr_stream_decode_u32(argp->xdr, &readdir->rd_maxcount) < 0) | |
1264 | return nfserr_bad_xdr; | |
1265 | if (xdr_stream_decode_uint32_array(argp->xdr, readdir->rd_bmval, | |
1266 | ARRAY_SIZE(readdir->rd_bmval)) < 0) | |
1267 | return nfserr_bad_xdr; | |
1da177e4 | 1268 | |
0dfaf2a3 | 1269 | return nfs_ok; |
1da177e4 LT |
1270 | } |
1271 | ||
b37ad28b | 1272 | static __be32 |
1da177e4 LT |
1273 | nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) |
1274 | { | |
b7f5fbf2 | 1275 | return nfsd4_decode_component4(argp, &remove->rm_name, &remove->rm_namelen); |
1da177e4 LT |
1276 | } |
1277 | ||
b37ad28b | 1278 | static __be32 |
1da177e4 LT |
1279 | nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) |
1280 | { | |
ba881a0a | 1281 | __be32 status; |
1da177e4 | 1282 | |
ba881a0a CL |
1283 | status = nfsd4_decode_component4(argp, &rename->rn_sname, &rename->rn_snamelen); |
1284 | if (status) | |
1da177e4 | 1285 | return status; |
ba881a0a | 1286 | return nfsd4_decode_component4(argp, &rename->rn_tname, &rename->rn_tnamelen); |
1da177e4 LT |
1287 | } |
1288 | ||
b37ad28b | 1289 | static __be32 |
1da177e4 LT |
1290 | nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) |
1291 | { | |
d12f9045 | 1292 | return nfsd4_decode_clientid4(argp, clientid); |
1da177e4 LT |
1293 | } |
1294 | ||
dcb488a3 AA |
1295 | static __be32 |
1296 | nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, | |
1297 | struct nfsd4_secinfo *secinfo) | |
1298 | { | |
d0abdae5 | 1299 | return nfsd4_decode_component4(argp, &secinfo->si_name, &secinfo->si_namelen); |
dcb488a3 AA |
1300 | } |
1301 | ||
b37ad28b | 1302 | static __be32 |
1da177e4 LT |
1303 | nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) |
1304 | { | |
e31a1b66 | 1305 | __be32 status; |
1da177e4 | 1306 | |
44592fe9 | 1307 | status = nfsd4_decode_stateid4(argp, &setattr->sa_stateid); |
e31a1b66 BH |
1308 | if (status) |
1309 | return status; | |
d1c263a0 CL |
1310 | return nfsd4_decode_fattr4(argp, setattr->sa_bmval, |
1311 | ARRAY_SIZE(setattr->sa_bmval), | |
1312 | &setattr->sa_iattr, &setattr->sa_acl, | |
1313 | &setattr->sa_label, NULL); | |
1da177e4 LT |
1314 | } |
1315 | ||
b37ad28b | 1316 | static __be32 |
1da177e4 LT |
1317 | nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) |
1318 | { | |
92fa6c08 | 1319 | __be32 *p, status; |
1da177e4 | 1320 | |
e1a90ebd AS |
1321 | if (argp->minorversion >= 1) |
1322 | return nfserr_notsupp; | |
1323 | ||
92fa6c08 CL |
1324 | status = nfsd4_decode_verifier4(argp, &setclientid->se_verf); |
1325 | if (status) | |
1326 | return status; | |
a084daf5 BF |
1327 | status = nfsd4_decode_opaque(argp, &setclientid->se_name); |
1328 | if (status) | |
92fa6c08 CL |
1329 | return status; |
1330 | if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_prog) < 0) | |
a084daf5 | 1331 | return nfserr_bad_xdr; |
92fa6c08 CL |
1332 | if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_netid_len) < 0) |
1333 | return nfserr_bad_xdr; | |
1334 | p = xdr_inline_decode(argp->xdr, setclientid->se_callback_netid_len); | |
1335 | if (!p) | |
1336 | return nfserr_bad_xdr; | |
7b723008 | 1337 | setclientid->se_callback_netid_val = svcxdr_savemem(argp, p, |
92fa6c08 CL |
1338 | setclientid->se_callback_netid_len); |
1339 | if (!setclientid->se_callback_netid_val) | |
1340 | return nfserr_jukebox; | |
1da177e4 | 1341 | |
92fa6c08 CL |
1342 | if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_addr_len) < 0) |
1343 | return nfserr_bad_xdr; | |
1344 | p = xdr_inline_decode(argp->xdr, setclientid->se_callback_addr_len); | |
1345 | if (!p) | |
1346 | return nfserr_bad_xdr; | |
7b723008 | 1347 | setclientid->se_callback_addr_val = svcxdr_savemem(argp, p, |
92fa6c08 CL |
1348 | setclientid->se_callback_addr_len); |
1349 | if (!setclientid->se_callback_addr_val) | |
1350 | return nfserr_jukebox; | |
92fa6c08 CL |
1351 | if (xdr_stream_decode_u32(argp->xdr, &setclientid->se_callback_ident) < 0) |
1352 | return nfserr_bad_xdr; | |
1da177e4 | 1353 | |
92fa6c08 | 1354 | return nfs_ok; |
1da177e4 LT |
1355 | } |
1356 | ||
b37ad28b | 1357 | static __be32 |
1da177e4 LT |
1358 | nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) |
1359 | { | |
d1ca5514 | 1360 | __be32 status; |
1da177e4 | 1361 | |
e1a90ebd AS |
1362 | if (argp->minorversion >= 1) |
1363 | return nfserr_notsupp; | |
1364 | ||
d1ca5514 CL |
1365 | status = nfsd4_decode_clientid4(argp, &scd_c->sc_clientid); |
1366 | if (status) | |
1367 | return status; | |
1368 | return nfsd4_decode_verifier4(argp, &scd_c->sc_confirm); | |
1da177e4 LT |
1369 | } |
1370 | ||
1371 | /* Also used for NVERIFY */ | |
b37ad28b | 1372 | static __be32 |
1da177e4 LT |
1373 | nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) |
1374 | { | |
67cd453e | 1375 | __be32 *p, status; |
1da177e4 | 1376 | |
67cd453e CL |
1377 | status = nfsd4_decode_bitmap4(argp, verify->ve_bmval, |
1378 | ARRAY_SIZE(verify->ve_bmval)); | |
1379 | if (status) | |
1380 | return status; | |
1da177e4 LT |
1381 | |
1382 | /* For convenience's sake, we compare raw xdr'd attributes in | |
e5f95703 BF |
1383 | * nfsd4_proc_verify */ |
1384 | ||
67cd453e CL |
1385 | if (xdr_stream_decode_u32(argp->xdr, &verify->ve_attrlen) < 0) |
1386 | return nfserr_bad_xdr; | |
1387 | p = xdr_inline_decode(argp->xdr, verify->ve_attrlen); | |
1388 | if (!p) | |
1389 | return nfserr_bad_xdr; | |
7b723008 | 1390 | verify->ve_attrval = svcxdr_savemem(argp, p, verify->ve_attrlen); |
67cd453e CL |
1391 | if (!verify->ve_attrval) |
1392 | return nfserr_jukebox; | |
1da177e4 | 1393 | |
67cd453e | 1394 | return nfs_ok; |
1da177e4 LT |
1395 | } |
1396 | ||
b37ad28b | 1397 | static __be32 |
1da177e4 LT |
1398 | nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) |
1399 | { | |
244e2bef | 1400 | __be32 status; |
1da177e4 | 1401 | |
244e2bef | 1402 | status = nfsd4_decode_stateid4(argp, &write->wr_stateid); |
e31a1b66 BH |
1403 | if (status) |
1404 | return status; | |
244e2bef CL |
1405 | if (xdr_stream_decode_u64(argp->xdr, &write->wr_offset) < 0) |
1406 | return nfserr_bad_xdr; | |
1407 | if (xdr_stream_decode_u32(argp->xdr, &write->wr_stable_how) < 0) | |
1408 | return nfserr_bad_xdr; | |
54bbb7d2 | 1409 | if (write->wr_stable_how > NFS_FILE_SYNC) |
244e2bef CL |
1410 | return nfserr_bad_xdr; |
1411 | if (xdr_stream_decode_u32(argp->xdr, &write->wr_buflen) < 0) | |
1412 | return nfserr_bad_xdr; | |
c1346a12 | 1413 | if (!xdr_stream_subsegment(argp->xdr, &write->wr_payload, write->wr_buflen)) |
244e2bef | 1414 | return nfserr_bad_xdr; |
1da177e4 | 1415 | |
244e2bef | 1416 | return nfs_ok; |
1da177e4 LT |
1417 | } |
1418 | ||
b37ad28b | 1419 | static __be32 |
1da177e4 LT |
1420 | nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) |
1421 | { | |
a4a80c15 | 1422 | __be32 status; |
1da177e4 | 1423 | |
e1a90ebd AS |
1424 | if (argp->minorversion >= 1) |
1425 | return nfserr_notsupp; | |
1426 | ||
a4a80c15 CL |
1427 | status = nfsd4_decode_state_owner4(argp, &rlockowner->rl_clientid, |
1428 | &rlockowner->rl_owner); | |
1429 | if (status) | |
1430 | return status; | |
1da177e4 | 1431 | |
60adfc50 AA |
1432 | if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) |
1433 | return nfserr_inval; | |
a4a80c15 CL |
1434 | |
1435 | return nfs_ok; | |
1da177e4 LT |
1436 | } |
1437 | ||
0f81d960 CL |
1438 | static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) |
1439 | { | |
1440 | if (xdr_stream_decode_u32(argp->xdr, &bc->bc_cb_program) < 0) | |
1441 | return nfserr_bad_xdr; | |
1442 | return nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); | |
1443 | } | |
1444 | ||
571e0451 CL |
1445 | static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) |
1446 | { | |
1447 | u32 use_conn_in_rdma_mode; | |
1448 | __be32 status; | |
1449 | ||
1450 | status = nfsd4_decode_sessionid4(argp, &bcts->sessionid); | |
1451 | if (status) | |
1452 | return status; | |
1453 | if (xdr_stream_decode_u32(argp->xdr, &bcts->dir) < 0) | |
1454 | return nfserr_bad_xdr; | |
1455 | if (xdr_stream_decode_u32(argp->xdr, &use_conn_in_rdma_mode) < 0) | |
1456 | return nfserr_bad_xdr; | |
1457 | ||
1458 | return nfs_ok; | |
1459 | } | |
1460 | ||
2548aa78 CL |
1461 | static __be32 |
1462 | nfsd4_decode_state_protect_ops(struct nfsd4_compoundargs *argp, | |
1463 | struct nfsd4_exchange_id *exid) | |
1464 | { | |
1465 | __be32 status; | |
1466 | ||
1467 | status = nfsd4_decode_bitmap4(argp, exid->spo_must_enforce, | |
1468 | ARRAY_SIZE(exid->spo_must_enforce)); | |
1469 | if (status) | |
1470 | return nfserr_bad_xdr; | |
1471 | status = nfsd4_decode_bitmap4(argp, exid->spo_must_allow, | |
1472 | ARRAY_SIZE(exid->spo_must_allow)); | |
1473 | if (status) | |
1474 | return nfserr_bad_xdr; | |
1475 | ||
1476 | return nfs_ok; | |
1477 | } | |
1478 | ||
547bfeb4 CL |
1479 | /* |
1480 | * This implementation currently does not support SP4_SSV. | |
1481 | * This decoder simply skips over these arguments. | |
1482 | */ | |
1483 | static noinline __be32 | |
1484 | nfsd4_decode_ssv_sp_parms(struct nfsd4_compoundargs *argp, | |
1485 | struct nfsd4_exchange_id *exid) | |
1486 | { | |
1487 | u32 count, window, num_gss_handles; | |
1488 | __be32 status; | |
1489 | ||
1490 | /* ssp_ops */ | |
1491 | status = nfsd4_decode_state_protect_ops(argp, exid); | |
1492 | if (status) | |
1493 | return status; | |
1494 | ||
1495 | /* ssp_hash_algs<> */ | |
1496 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) | |
1497 | return nfserr_bad_xdr; | |
1498 | while (count--) { | |
1499 | status = nfsd4_decode_ignored_string(argp, 0); | |
1500 | if (status) | |
1501 | return status; | |
1502 | } | |
1503 | ||
1504 | /* ssp_encr_algs<> */ | |
1505 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) | |
1506 | return nfserr_bad_xdr; | |
1507 | while (count--) { | |
1508 | status = nfsd4_decode_ignored_string(argp, 0); | |
1509 | if (status) | |
1510 | return status; | |
1511 | } | |
1512 | ||
1513 | if (xdr_stream_decode_u32(argp->xdr, &window) < 0) | |
1514 | return nfserr_bad_xdr; | |
1515 | if (xdr_stream_decode_u32(argp->xdr, &num_gss_handles) < 0) | |
1516 | return nfserr_bad_xdr; | |
1517 | ||
1518 | return nfs_ok; | |
1519 | } | |
1520 | ||
2db134eb | 1521 | static __be32 |
523ec6ed CL |
1522 | nfsd4_decode_state_protect4_a(struct nfsd4_compoundargs *argp, |
1523 | struct nfsd4_exchange_id *exid) | |
2db134eb | 1524 | { |
523ec6ed | 1525 | __be32 status; |
0733d213 | 1526 | |
523ec6ed | 1527 | if (xdr_stream_decode_u32(argp->xdr, &exid->spa_how) < 0) |
a084daf5 | 1528 | return nfserr_bad_xdr; |
0733d213 AA |
1529 | switch (exid->spa_how) { |
1530 | case SP4_NONE: | |
1531 | break; | |
1532 | case SP4_MACH_CRED: | |
2548aa78 | 1533 | status = nfsd4_decode_state_protect_ops(argp, exid); |
ed941643 | 1534 | if (status) |
2548aa78 | 1535 | return status; |
0733d213 AA |
1536 | break; |
1537 | case SP4_SSV: | |
547bfeb4 | 1538 | status = nfsd4_decode_ssv_sp_parms(argp, exid); |
2548aa78 CL |
1539 | if (status) |
1540 | return status; | |
0733d213 AA |
1541 | break; |
1542 | default: | |
523ec6ed | 1543 | return nfserr_bad_xdr; |
0733d213 AA |
1544 | } |
1545 | ||
523ec6ed CL |
1546 | return nfs_ok; |
1547 | } | |
1548 | ||
10ff8422 CL |
1549 | static __be32 |
1550 | nfsd4_decode_nfs_impl_id4(struct nfsd4_compoundargs *argp, | |
1551 | struct nfsd4_exchange_id *exid) | |
1552 | { | |
1553 | __be32 status; | |
1554 | u32 count; | |
1555 | ||
1556 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) | |
1557 | return nfserr_bad_xdr; | |
1558 | switch (count) { | |
1559 | case 0: | |
1560 | break; | |
1561 | case 1: | |
1562 | /* Note that RFC 8881 places no length limit on | |
1563 | * nii_domain, but this implementation permits no | |
1564 | * more than NFS4_OPAQUE_LIMIT bytes */ | |
1565 | status = nfsd4_decode_opaque(argp, &exid->nii_domain); | |
1566 | if (status) | |
1567 | return status; | |
1568 | /* Note that RFC 8881 places no length limit on | |
1569 | * nii_name, but this implementation permits no | |
1570 | * more than NFS4_OPAQUE_LIMIT bytes */ | |
1571 | status = nfsd4_decode_opaque(argp, &exid->nii_name); | |
1572 | if (status) | |
1573 | return status; | |
1574 | status = nfsd4_decode_nfstime4(argp, &exid->nii_time); | |
1575 | if (status) | |
1576 | return status; | |
1577 | break; | |
1578 | default: | |
1579 | return nfserr_bad_xdr; | |
1580 | } | |
1581 | ||
1582 | return nfs_ok; | |
1583 | } | |
1584 | ||
523ec6ed CL |
1585 | static __be32 |
1586 | nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, | |
1587 | struct nfsd4_exchange_id *exid) | |
1588 | { | |
10ff8422 | 1589 | __be32 status; |
523ec6ed CL |
1590 | |
1591 | status = nfsd4_decode_verifier4(argp, &exid->verifier); | |
1592 | if (status) | |
1593 | return status; | |
1594 | status = nfsd4_decode_opaque(argp, &exid->clname); | |
1595 | if (status) | |
1596 | return status; | |
1597 | if (xdr_stream_decode_u32(argp->xdr, &exid->flags) < 0) | |
1598 | return nfserr_bad_xdr; | |
1599 | status = nfsd4_decode_state_protect4_a(argp, exid); | |
1600 | if (status) | |
1601 | return status; | |
10ff8422 | 1602 | return nfsd4_decode_nfs_impl_id4(argp, exid); |
2db134eb AA |
1603 | } |
1604 | ||
3a3f1fba CL |
1605 | static __be32 |
1606 | nfsd4_decode_channel_attrs4(struct nfsd4_compoundargs *argp, | |
1607 | struct nfsd4_channel_attrs *ca) | |
1608 | { | |
1609 | __be32 *p; | |
1610 | ||
1611 | p = xdr_inline_decode(argp->xdr, XDR_UNIT * 7); | |
1612 | if (!p) | |
1613 | return nfserr_bad_xdr; | |
1614 | ||
1615 | /* headerpadsz is ignored */ | |
1616 | p++; | |
1617 | ca->maxreq_sz = be32_to_cpup(p++); | |
1618 | ca->maxresp_sz = be32_to_cpup(p++); | |
1619 | ca->maxresp_cached = be32_to_cpup(p++); | |
1620 | ca->maxops = be32_to_cpup(p++); | |
1621 | ca->maxreqs = be32_to_cpup(p++); | |
1622 | ca->nr_rdma_attrs = be32_to_cpup(p); | |
1623 | switch (ca->nr_rdma_attrs) { | |
1624 | case 0: | |
1625 | break; | |
1626 | case 1: | |
1627 | if (xdr_stream_decode_u32(argp->xdr, &ca->rdma_attrs) < 0) | |
1628 | return nfserr_bad_xdr; | |
1629 | break; | |
1630 | default: | |
1631 | return nfserr_bad_xdr; | |
1632 | } | |
1633 | ||
1634 | return nfs_ok; | |
1635 | } | |
1636 | ||
2db134eb AA |
1637 | static __be32 |
1638 | nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, | |
1639 | struct nfsd4_create_session *sess) | |
1640 | { | |
81243e3f | 1641 | __be32 status; |
ec6b5d7b | 1642 | |
81243e3f CL |
1643 | status = nfsd4_decode_clientid4(argp, &sess->clientid); |
1644 | if (status) | |
1645 | return status; | |
1646 | if (xdr_stream_decode_u32(argp->xdr, &sess->seqid) < 0) | |
1647 | return nfserr_bad_xdr; | |
1648 | if (xdr_stream_decode_u32(argp->xdr, &sess->flags) < 0) | |
1649 | return nfserr_bad_xdr; | |
3a3f1fba CL |
1650 | status = nfsd4_decode_channel_attrs4(argp, &sess->fore_channel); |
1651 | if (status) | |
1652 | return status; | |
1653 | status = nfsd4_decode_channel_attrs4(argp, &sess->back_channel); | |
81243e3f CL |
1654 | if (status) |
1655 | return status; | |
1656 | if (xdr_stream_decode_u32(argp->xdr, &sess->callback_prog) < 0) | |
1657 | return nfserr_bad_xdr; | |
1658 | status = nfsd4_decode_cb_sec(argp, &sess->cb_sec); | |
3a3f1fba CL |
1659 | if (status) |
1660 | return status; | |
ec6b5d7b | 1661 | |
81243e3f | 1662 | return nfs_ok; |
2db134eb AA |
1663 | } |
1664 | ||
1665 | static __be32 | |
1666 | nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, | |
1667 | struct nfsd4_destroy_session *destroy_session) | |
1668 | { | |
94e254af | 1669 | return nfsd4_decode_sessionid4(argp, &destroy_session->sessionid); |
2db134eb AA |
1670 | } |
1671 | ||
e1ca12df BS |
1672 | static __be32 |
1673 | nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, | |
1674 | struct nfsd4_free_stateid *free_stateid) | |
1675 | { | |
aec387d5 | 1676 | return nfsd4_decode_stateid4(argp, &free_stateid->fr_stateid); |
e1ca12df BS |
1677 | } |
1678 | ||
9cf514cc CH |
1679 | #ifdef CONFIG_NFSD_PNFS |
1680 | static __be32 | |
1681 | nfsd4_decode_getdeviceinfo(struct nfsd4_compoundargs *argp, | |
1682 | struct nfsd4_getdeviceinfo *gdev) | |
1683 | { | |
04495971 CL |
1684 | __be32 status; |
1685 | ||
1686 | status = nfsd4_decode_deviceid4(argp, &gdev->gd_devid); | |
1687 | if (status) | |
1688 | return status; | |
1689 | if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_layout_type) < 0) | |
1690 | return nfserr_bad_xdr; | |
1691 | if (xdr_stream_decode_u32(argp->xdr, &gdev->gd_maxcount) < 0) | |
1692 | return nfserr_bad_xdr; | |
1693 | if (xdr_stream_decode_uint32_array(argp->xdr, | |
1694 | &gdev->gd_notify_types, 1) < 0) | |
1695 | return nfserr_bad_xdr; | |
1696 | ||
1697 | return nfs_ok; | |
9cf514cc CH |
1698 | } |
1699 | ||
5185980d CL |
1700 | static __be32 |
1701 | nfsd4_decode_layoutcommit(struct nfsd4_compoundargs *argp, | |
1702 | struct nfsd4_layoutcommit *lcp) | |
1703 | { | |
1704 | __be32 *p, status; | |
1705 | ||
1706 | if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.offset) < 0) | |
1707 | return nfserr_bad_xdr; | |
1708 | if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_seg.length) < 0) | |
1709 | return nfserr_bad_xdr; | |
1710 | if (xdr_stream_decode_bool(argp->xdr, &lcp->lc_reclaim) < 0) | |
1711 | return nfserr_bad_xdr; | |
1712 | status = nfsd4_decode_stateid4(argp, &lcp->lc_sid); | |
1713 | if (status) | |
1714 | return status; | |
1715 | if (xdr_stream_decode_u32(argp->xdr, &lcp->lc_newoffset) < 0) | |
1716 | return nfserr_bad_xdr; | |
1717 | if (lcp->lc_newoffset) { | |
1718 | if (xdr_stream_decode_u64(argp->xdr, &lcp->lc_last_wr) < 0) | |
1719 | return nfserr_bad_xdr; | |
1720 | } else | |
1721 | lcp->lc_last_wr = 0; | |
1722 | p = xdr_inline_decode(argp->xdr, XDR_UNIT); | |
1723 | if (!p) | |
1724 | return nfserr_bad_xdr; | |
1725 | if (xdr_item_is_present(p)) { | |
1726 | status = nfsd4_decode_nfstime4(argp, &lcp->lc_mtime); | |
1727 | if (status) | |
1728 | return status; | |
1729 | } else { | |
1730 | lcp->lc_mtime.tv_nsec = UTIME_NOW; | |
1731 | } | |
1732 | return nfsd4_decode_layoutupdate4(argp, lcp); | |
1733 | } | |
1734 | ||
9cf514cc CH |
1735 | static __be32 |
1736 | nfsd4_decode_layoutget(struct nfsd4_compoundargs *argp, | |
1737 | struct nfsd4_layoutget *lgp) | |
1738 | { | |
c8e88e3a | 1739 | __be32 status; |
db59c0ef | 1740 | |
c8e88e3a CL |
1741 | if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_signal) < 0) |
1742 | return nfserr_bad_xdr; | |
1743 | if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_layout_type) < 0) | |
1744 | return nfserr_bad_xdr; | |
1745 | if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_seg.iomode) < 0) | |
1746 | return nfserr_bad_xdr; | |
1747 | if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.offset) < 0) | |
1748 | return nfserr_bad_xdr; | |
1749 | if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_seg.length) < 0) | |
1750 | return nfserr_bad_xdr; | |
1751 | if (xdr_stream_decode_u64(argp->xdr, &lgp->lg_minlength) < 0) | |
1752 | return nfserr_bad_xdr; | |
1753 | status = nfsd4_decode_stateid4(argp, &lgp->lg_sid); | |
db59c0ef KM |
1754 | if (status) |
1755 | return status; | |
c8e88e3a CL |
1756 | if (xdr_stream_decode_u32(argp->xdr, &lgp->lg_maxcount) < 0) |
1757 | return nfserr_bad_xdr; | |
db59c0ef | 1758 | |
c8e88e3a | 1759 | return nfs_ok; |
9cf514cc CH |
1760 | } |
1761 | ||
9cf514cc CH |
1762 | static __be32 |
1763 | nfsd4_decode_layoutreturn(struct nfsd4_compoundargs *argp, | |
1764 | struct nfsd4_layoutreturn *lrp) | |
1765 | { | |
645fcad3 CL |
1766 | if (xdr_stream_decode_bool(argp->xdr, &lrp->lr_reclaim) < 0) |
1767 | return nfserr_bad_xdr; | |
1768 | if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_layout_type) < 0) | |
1769 | return nfserr_bad_xdr; | |
1770 | if (xdr_stream_decode_u32(argp->xdr, &lrp->lr_seg.iomode) < 0) | |
1771 | return nfserr_bad_xdr; | |
1772 | return nfsd4_decode_layoutreturn4(argp, lrp); | |
9cf514cc CH |
1773 | } |
1774 | #endif /* CONFIG_NFSD_PNFS */ | |
1775 | ||
53d70873 CL |
1776 | static __be32 nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, |
1777 | struct nfsd4_secinfo_no_name *sin) | |
1778 | { | |
1779 | if (xdr_stream_decode_u32(argp->xdr, &sin->sin_style) < 0) | |
1780 | return nfserr_bad_xdr; | |
1781 | return nfs_ok; | |
1782 | } | |
1783 | ||
cf907b11 CL |
1784 | static __be32 |
1785 | nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, | |
1786 | struct nfsd4_sequence *seq) | |
1787 | { | |
1788 | __be32 *p, status; | |
1789 | ||
1790 | status = nfsd4_decode_sessionid4(argp, &seq->sessionid); | |
1791 | if (status) | |
1792 | return status; | |
1793 | p = xdr_inline_decode(argp->xdr, XDR_UNIT * 4); | |
1794 | if (!p) | |
1795 | return nfserr_bad_xdr; | |
1796 | seq->seqid = be32_to_cpup(p++); | |
1797 | seq->slotid = be32_to_cpup(p++); | |
1798 | seq->maxslots = be32_to_cpup(p++); | |
1799 | seq->cachethis = be32_to_cpup(p); | |
1800 | ||
1801 | return nfs_ok; | |
1802 | } | |
1803 | ||
b7a0c8f6 CL |
1804 | static __be32 |
1805 | nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) | |
1806 | { | |
1807 | struct nfsd4_test_stateid_id *stateid; | |
1808 | __be32 status; | |
1809 | u32 i; | |
1810 | ||
1811 | if (xdr_stream_decode_u32(argp->xdr, &test_stateid->ts_num_ids) < 0) | |
1812 | return nfserr_bad_xdr; | |
1813 | ||
1814 | INIT_LIST_HEAD(&test_stateid->ts_stateid_list); | |
1815 | for (i = 0; i < test_stateid->ts_num_ids; i++) { | |
1816 | stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); | |
1817 | if (!stateid) | |
1818 | return nfserrno(-ENOMEM); /* XXX: not jukebox? */ | |
1819 | INIT_LIST_HEAD(&stateid->ts_id_list); | |
1820 | list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); | |
1821 | status = nfsd4_decode_stateid4(argp, &stateid->ts_id_stateid); | |
1822 | if (status) | |
1823 | return status; | |
1824 | } | |
1825 | ||
1826 | return nfs_ok; | |
1827 | } | |
1828 | ||
c95f2ec3 CL |
1829 | static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, |
1830 | struct nfsd4_destroy_clientid *dc) | |
1831 | { | |
1832 | return nfsd4_decode_clientid4(argp, &dc->clientid); | |
1833 | } | |
1834 | ||
0d646784 CL |
1835 | static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, |
1836 | struct nfsd4_reclaim_complete *rc) | |
1837 | { | |
1838 | if (xdr_stream_decode_bool(argp->xdr, &rc->rca_one_fs) < 0) | |
1839 | return nfserr_bad_xdr; | |
1840 | return nfs_ok; | |
1841 | } | |
1842 | ||
95d871f0 AS |
1843 | static __be32 |
1844 | nfsd4_decode_fallocate(struct nfsd4_compoundargs *argp, | |
1845 | struct nfsd4_fallocate *fallocate) | |
1846 | { | |
6aef27aa | 1847 | __be32 status; |
95d871f0 | 1848 | |
6aef27aa | 1849 | status = nfsd4_decode_stateid4(argp, &fallocate->falloc_stateid); |
95d871f0 AS |
1850 | if (status) |
1851 | return status; | |
6aef27aa CL |
1852 | if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_offset) < 0) |
1853 | return nfserr_bad_xdr; | |
1854 | if (xdr_stream_decode_u64(argp->xdr, &fallocate->falloc_length) < 0) | |
1855 | return nfserr_bad_xdr; | |
95d871f0 | 1856 | |
6aef27aa | 1857 | return nfs_ok; |
95d871f0 AS |
1858 | } |
1859 | ||
84e1b21d OK |
1860 | static __be32 nfsd4_decode_nl4_server(struct nfsd4_compoundargs *argp, |
1861 | struct nl4_server *ns) | |
1862 | { | |
84e1b21d | 1863 | struct nfs42_netaddr *naddr; |
f49e4b4d | 1864 | __be32 *p; |
84e1b21d | 1865 | |
f49e4b4d CL |
1866 | if (xdr_stream_decode_u32(argp->xdr, &ns->nl4_type) < 0) |
1867 | return nfserr_bad_xdr; | |
84e1b21d OK |
1868 | |
1869 | /* currently support for 1 inter-server source server */ | |
1870 | switch (ns->nl4_type) { | |
1871 | case NL4_NETADDR: | |
1872 | naddr = &ns->u.nl4_addr; | |
1873 | ||
f49e4b4d CL |
1874 | if (xdr_stream_decode_u32(argp->xdr, &naddr->netid_len) < 0) |
1875 | return nfserr_bad_xdr; | |
84e1b21d | 1876 | if (naddr->netid_len > RPCBIND_MAXNETIDLEN) |
f49e4b4d | 1877 | return nfserr_bad_xdr; |
84e1b21d | 1878 | |
f49e4b4d CL |
1879 | p = xdr_inline_decode(argp->xdr, naddr->netid_len); |
1880 | if (!p) | |
1881 | return nfserr_bad_xdr; | |
1882 | memcpy(naddr->netid, p, naddr->netid_len); | |
84e1b21d | 1883 | |
f49e4b4d CL |
1884 | if (xdr_stream_decode_u32(argp->xdr, &naddr->addr_len) < 0) |
1885 | return nfserr_bad_xdr; | |
84e1b21d | 1886 | if (naddr->addr_len > RPCBIND_MAXUADDRLEN) |
f49e4b4d | 1887 | return nfserr_bad_xdr; |
84e1b21d | 1888 | |
f49e4b4d CL |
1889 | p = xdr_inline_decode(argp->xdr, naddr->addr_len); |
1890 | if (!p) | |
1891 | return nfserr_bad_xdr; | |
1892 | memcpy(naddr->addr, p, naddr->addr_len); | |
84e1b21d OK |
1893 | break; |
1894 | default: | |
f49e4b4d | 1895 | return nfserr_bad_xdr; |
84e1b21d | 1896 | } |
f49e4b4d CL |
1897 | |
1898 | return nfs_ok; | |
84e1b21d OK |
1899 | } |
1900 | ||
29ae7f9d AS |
1901 | static __be32 |
1902 | nfsd4_decode_copy(struct nfsd4_compoundargs *argp, struct nfsd4_copy *copy) | |
1903 | { | |
84e1b21d | 1904 | struct nl4_server *ns_dummy; |
e8febea7 CL |
1905 | u32 consecutive, i, count; |
1906 | __be32 status; | |
29ae7f9d | 1907 | |
e8febea7 | 1908 | status = nfsd4_decode_stateid4(argp, ©->cp_src_stateid); |
29ae7f9d AS |
1909 | if (status) |
1910 | return status; | |
e8febea7 | 1911 | status = nfsd4_decode_stateid4(argp, ©->cp_dst_stateid); |
29ae7f9d AS |
1912 | if (status) |
1913 | return status; | |
e8febea7 CL |
1914 | if (xdr_stream_decode_u64(argp->xdr, ©->cp_src_pos) < 0) |
1915 | return nfserr_bad_xdr; | |
1916 | if (xdr_stream_decode_u64(argp->xdr, ©->cp_dst_pos) < 0) | |
1917 | return nfserr_bad_xdr; | |
1918 | if (xdr_stream_decode_u64(argp->xdr, ©->cp_count) < 0) | |
1919 | return nfserr_bad_xdr; | |
1920 | /* ca_consecutive: we always do consecutive copies */ | |
1921 | if (xdr_stream_decode_u32(argp->xdr, &consecutive) < 0) | |
1922 | return nfserr_bad_xdr; | |
1923 | if (xdr_stream_decode_u32(argp->xdr, ©->cp_synchronous) < 0) | |
1924 | return nfserr_bad_xdr; | |
29ae7f9d | 1925 | |
e8febea7 CL |
1926 | if (xdr_stream_decode_u32(argp->xdr, &count) < 0) |
1927 | return nfserr_bad_xdr; | |
84e1b21d OK |
1928 | copy->cp_intra = false; |
1929 | if (count == 0) { /* intra-server copy */ | |
1930 | copy->cp_intra = true; | |
e8febea7 | 1931 | return nfs_ok; |
84e1b21d OK |
1932 | } |
1933 | ||
e8febea7 | 1934 | /* decode all the supplied server addresses but use only the first */ |
84e1b21d OK |
1935 | status = nfsd4_decode_nl4_server(argp, ©->cp_src); |
1936 | if (status) | |
1937 | return status; | |
1938 | ||
1939 | ns_dummy = kmalloc(sizeof(struct nl4_server), GFP_KERNEL); | |
1940 | if (ns_dummy == NULL) | |
e8febea7 | 1941 | return nfserrno(-ENOMEM); /* XXX: jukebox? */ |
84e1b21d OK |
1942 | for (i = 0; i < count - 1; i++) { |
1943 | status = nfsd4_decode_nl4_server(argp, ns_dummy); | |
1944 | if (status) { | |
1945 | kfree(ns_dummy); | |
1946 | return status; | |
1947 | } | |
1948 | } | |
1949 | kfree(ns_dummy); | |
29ae7f9d | 1950 | |
e8febea7 | 1951 | return nfs_ok; |
29ae7f9d AS |
1952 | } |
1953 | ||
51911868 OK |
1954 | static __be32 |
1955 | nfsd4_decode_copy_notify(struct nfsd4_compoundargs *argp, | |
1956 | struct nfsd4_copy_notify *cn) | |
1957 | { | |
5aff7d08 | 1958 | __be32 status; |
51911868 | 1959 | |
f9a953fb | 1960 | status = nfsd4_decode_stateid4(argp, &cn->cpn_src_stateid); |
51911868 OK |
1961 | if (status) |
1962 | return status; | |
1963 | return nfsd4_decode_nl4_server(argp, &cn->cpn_dst); | |
1964 | } | |
1965 | ||
f9a953fb CL |
1966 | static __be32 |
1967 | nfsd4_decode_offload_status(struct nfsd4_compoundargs *argp, | |
1968 | struct nfsd4_offload_status *os) | |
1969 | { | |
2846bb05 | 1970 | return nfsd4_decode_stateid4(argp, &os->stateid); |
f9a953fb CL |
1971 | } |
1972 | ||
24bab491 AS |
1973 | static __be32 |
1974 | nfsd4_decode_seek(struct nfsd4_compoundargs *argp, struct nfsd4_seek *seek) | |
1975 | { | |
9d32b412 | 1976 | __be32 status; |
24bab491 | 1977 | |
9d32b412 | 1978 | status = nfsd4_decode_stateid4(argp, &seek->seek_stateid); |
24bab491 AS |
1979 | if (status) |
1980 | return status; | |
9d32b412 CL |
1981 | if (xdr_stream_decode_u64(argp->xdr, &seek->seek_offset) < 0) |
1982 | return nfserr_bad_xdr; | |
1983 | if (xdr_stream_decode_u32(argp->xdr, &seek->seek_whence) < 0) | |
1984 | return nfserr_bad_xdr; | |
24bab491 | 1985 | |
9d32b412 | 1986 | return nfs_ok; |
24bab491 AS |
1987 | } |
1988 | ||
3dfd0b0e CL |
1989 | static __be32 |
1990 | nfsd4_decode_clone(struct nfsd4_compoundargs *argp, struct nfsd4_clone *clone) | |
1991 | { | |
1992 | __be32 status; | |
1993 | ||
1994 | status = nfsd4_decode_stateid4(argp, &clone->cl_src_stateid); | |
1995 | if (status) | |
1996 | return status; | |
1997 | status = nfsd4_decode_stateid4(argp, &clone->cl_dst_stateid); | |
1998 | if (status) | |
1999 | return status; | |
2000 | if (xdr_stream_decode_u64(argp->xdr, &clone->cl_src_pos) < 0) | |
2001 | return nfserr_bad_xdr; | |
2002 | if (xdr_stream_decode_u64(argp->xdr, &clone->cl_dst_pos) < 0) | |
2003 | return nfserr_bad_xdr; | |
2004 | if (xdr_stream_decode_u64(argp->xdr, &clone->cl_count) < 0) | |
2005 | return nfserr_bad_xdr; | |
2006 | ||
2007 | return nfs_ok; | |
2008 | } | |
2009 | ||
23e50fe3 FL |
2010 | /* |
2011 | * XDR data that is more than PAGE_SIZE in size is normally part of a | |
2012 | * read or write. However, the size of extended attributes is limited | |
2013 | * by the maximum request size, and then further limited by the underlying | |
2014 | * filesystem limits. This can exceed PAGE_SIZE (currently, XATTR_SIZE_MAX | |
2015 | * is 64k). Since there is no kvec- or page-based interface to xattrs, | |
2016 | * and we're not dealing with contiguous pages, we need to do some copying. | |
2017 | */ | |
2018 | ||
2019 | /* | |
c1346a12 | 2020 | * Decode data into buffer. |
23e50fe3 FL |
2021 | */ |
2022 | static __be32 | |
c1346a12 CL |
2023 | nfsd4_vbuf_from_vector(struct nfsd4_compoundargs *argp, struct xdr_buf *xdr, |
2024 | char **bufp, u32 buflen) | |
23e50fe3 | 2025 | { |
c1346a12 CL |
2026 | struct page **pages = xdr->pages; |
2027 | struct kvec *head = xdr->head; | |
23e50fe3 FL |
2028 | char *tmp, *dp; |
2029 | u32 len; | |
2030 | ||
2031 | if (buflen <= head->iov_len) { | |
2032 | /* | |
2033 | * We're in luck, the head has enough space. Just return | |
2034 | * the head, no need for copying. | |
2035 | */ | |
2036 | *bufp = head->iov_base; | |
2037 | return 0; | |
2038 | } | |
2039 | ||
2040 | tmp = svcxdr_tmpalloc(argp, buflen); | |
2041 | if (tmp == NULL) | |
2042 | return nfserr_jukebox; | |
2043 | ||
2044 | dp = tmp; | |
2045 | memcpy(dp, head->iov_base, head->iov_len); | |
2046 | buflen -= head->iov_len; | |
2047 | dp += head->iov_len; | |
2048 | ||
2049 | while (buflen > 0) { | |
2050 | len = min_t(u32, buflen, PAGE_SIZE); | |
2051 | memcpy(dp, page_address(*pages), len); | |
2052 | ||
2053 | buflen -= len; | |
2054 | dp += len; | |
2055 | pages++; | |
2056 | } | |
2057 | ||
2058 | *bufp = tmp; | |
2059 | return 0; | |
2060 | } | |
2061 | ||
2062 | /* | |
2063 | * Get a user extended attribute name from the XDR buffer. | |
2064 | * It will not have the "user." prefix, so prepend it. | |
2065 | * Lastly, check for nul characters in the name. | |
2066 | */ | |
2067 | static __be32 | |
2068 | nfsd4_decode_xattr_name(struct nfsd4_compoundargs *argp, char **namep) | |
2069 | { | |
23e50fe3 FL |
2070 | char *name, *sp, *dp; |
2071 | u32 namelen, cnt; | |
830c7150 | 2072 | __be32 *p; |
23e50fe3 | 2073 | |
830c7150 CL |
2074 | if (xdr_stream_decode_u32(argp->xdr, &namelen) < 0) |
2075 | return nfserr_bad_xdr; | |
23e50fe3 FL |
2076 | if (namelen > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) |
2077 | return nfserr_nametoolong; | |
23e50fe3 | 2078 | if (namelen == 0) |
830c7150 CL |
2079 | return nfserr_bad_xdr; |
2080 | p = xdr_inline_decode(argp->xdr, namelen); | |
2081 | if (!p) | |
2082 | return nfserr_bad_xdr; | |
23e50fe3 FL |
2083 | name = svcxdr_tmpalloc(argp, namelen + XATTR_USER_PREFIX_LEN + 1); |
2084 | if (!name) | |
2085 | return nfserr_jukebox; | |
23e50fe3 FL |
2086 | memcpy(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); |
2087 | ||
2088 | /* | |
2089 | * Copy the extended attribute name over while checking for 0 | |
2090 | * characters. | |
2091 | */ | |
2092 | sp = (char *)p; | |
2093 | dp = name + XATTR_USER_PREFIX_LEN; | |
2094 | cnt = namelen; | |
2095 | ||
2096 | while (cnt-- > 0) { | |
2097 | if (*sp == '\0') | |
830c7150 | 2098 | return nfserr_bad_xdr; |
23e50fe3 FL |
2099 | *dp++ = *sp++; |
2100 | } | |
2101 | *dp = '\0'; | |
2102 | ||
2103 | *namep = name; | |
2104 | ||
830c7150 | 2105 | return nfs_ok; |
23e50fe3 FL |
2106 | } |
2107 | ||
2108 | /* | |
2109 | * A GETXATTR op request comes without a length specifier. We just set the | |
2110 | * maximum length for the reply based on XATTR_SIZE_MAX and the maximum | |
2111 | * channel reply size. nfsd_getxattr will probe the length of the xattr, | |
2112 | * check it against getxa_len, and allocate + return the value. | |
2113 | */ | |
2114 | static __be32 | |
2115 | nfsd4_decode_getxattr(struct nfsd4_compoundargs *argp, | |
2116 | struct nfsd4_getxattr *getxattr) | |
2117 | { | |
2118 | __be32 status; | |
2119 | u32 maxcount; | |
2120 | ||
2121 | status = nfsd4_decode_xattr_name(argp, &getxattr->getxa_name); | |
2122 | if (status) | |
2123 | return status; | |
2124 | ||
2125 | maxcount = svc_max_payload(argp->rqstp); | |
2126 | maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount); | |
2127 | ||
2128 | getxattr->getxa_len = maxcount; | |
2129 | ||
2130 | return status; | |
2131 | } | |
2132 | ||
2133 | static __be32 | |
2134 | nfsd4_decode_setxattr(struct nfsd4_compoundargs *argp, | |
2135 | struct nfsd4_setxattr *setxattr) | |
2136 | { | |
23e50fe3 | 2137 | u32 flags, maxcount, size; |
403366a7 | 2138 | __be32 status; |
23e50fe3 | 2139 | |
403366a7 CL |
2140 | if (xdr_stream_decode_u32(argp->xdr, &flags) < 0) |
2141 | return nfserr_bad_xdr; | |
23e50fe3 FL |
2142 | |
2143 | if (flags > SETXATTR4_REPLACE) | |
2144 | return nfserr_inval; | |
2145 | setxattr->setxa_flags = flags; | |
2146 | ||
2147 | status = nfsd4_decode_xattr_name(argp, &setxattr->setxa_name); | |
2148 | if (status) | |
2149 | return status; | |
2150 | ||
2151 | maxcount = svc_max_payload(argp->rqstp); | |
2152 | maxcount = min_t(u32, XATTR_SIZE_MAX, maxcount); | |
2153 | ||
403366a7 CL |
2154 | if (xdr_stream_decode_u32(argp->xdr, &size) < 0) |
2155 | return nfserr_bad_xdr; | |
23e50fe3 FL |
2156 | if (size > maxcount) |
2157 | return nfserr_xattr2big; | |
2158 | ||
2159 | setxattr->setxa_len = size; | |
2160 | if (size > 0) { | |
c1346a12 | 2161 | struct xdr_buf payload; |
23e50fe3 | 2162 | |
c1346a12 | 2163 | if (!xdr_stream_subsegment(argp->xdr, &payload, size)) |
403366a7 | 2164 | return nfserr_bad_xdr; |
c1346a12 CL |
2165 | status = nfsd4_vbuf_from_vector(argp, &payload, |
2166 | &setxattr->setxa_buf, size); | |
23e50fe3 FL |
2167 | } |
2168 | ||
403366a7 | 2169 | return nfs_ok; |
23e50fe3 FL |
2170 | } |
2171 | ||
2172 | static __be32 | |
2173 | nfsd4_decode_listxattrs(struct nfsd4_compoundargs *argp, | |
2174 | struct nfsd4_listxattrs *listxattrs) | |
2175 | { | |
23e50fe3 FL |
2176 | u32 maxcount; |
2177 | ||
2212036c CL |
2178 | if (xdr_stream_decode_u64(argp->xdr, &listxattrs->lsxa_cookie) < 0) |
2179 | return nfserr_bad_xdr; | |
23e50fe3 FL |
2180 | |
2181 | /* | |
2182 | * If the cookie is too large to have even one user.x attribute | |
2183 | * plus trailing '\0' left in a maximum size buffer, it's invalid. | |
2184 | */ | |
2185 | if (listxattrs->lsxa_cookie >= | |
2186 | (XATTR_LIST_MAX / (XATTR_USER_PREFIX_LEN + 2))) | |
2187 | return nfserr_badcookie; | |
2188 | ||
2212036c CL |
2189 | if (xdr_stream_decode_u32(argp->xdr, &maxcount) < 0) |
2190 | return nfserr_bad_xdr; | |
23e50fe3 FL |
2191 | if (maxcount < 8) |
2192 | /* Always need at least 2 words (length and one character) */ | |
2193 | return nfserr_inval; | |
2194 | ||
2195 | maxcount = min(maxcount, svc_max_payload(argp->rqstp)); | |
2196 | listxattrs->lsxa_maxcount = maxcount; | |
2197 | ||
2212036c | 2198 | return nfs_ok; |
23e50fe3 FL |
2199 | } |
2200 | ||
2201 | static __be32 | |
2202 | nfsd4_decode_removexattr(struct nfsd4_compoundargs *argp, | |
2203 | struct nfsd4_removexattr *removexattr) | |
2204 | { | |
2205 | return nfsd4_decode_xattr_name(argp, &removexattr->rmxa_name); | |
2206 | } | |
2207 | ||
347e0ad9 BH |
2208 | static __be32 |
2209 | nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) | |
2210 | { | |
2211 | return nfs_ok; | |
2212 | } | |
2213 | ||
3c375c6f BH |
2214 | static __be32 |
2215 | nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) | |
2216 | { | |
1e685ec2 | 2217 | return nfserr_notsupp; |
3c375c6f BH |
2218 | } |
2219 | ||
347e0ad9 BH |
2220 | typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); |
2221 | ||
c1df609d | 2222 | static const nfsd4_dec nfsd4_dec_ops[] = { |
ad1060c8 BF |
2223 | [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, |
2224 | [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, | |
2225 | [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, | |
2226 | [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, | |
2227 | [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, | |
2228 | [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, | |
2229 | [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, | |
2230 | [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, | |
2231 | [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, | |
2232 | [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, | |
2233 | [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, | |
2234 | [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, | |
2235 | [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, | |
2236 | [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, | |
2237 | [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, | |
2238 | [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, | |
2239 | [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, | |
2240 | [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, | |
2241 | [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, | |
2242 | [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, | |
e1a90ebd | 2243 | [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, |
ad1060c8 BF |
2244 | [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, |
2245 | [OP_READ] = (nfsd4_dec)nfsd4_decode_read, | |
2246 | [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, | |
2247 | [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, | |
2248 | [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, | |
2249 | [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, | |
2250 | [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, | |
2251 | [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, | |
2252 | [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, | |
2253 | [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, | |
2254 | [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, | |
2255 | [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, | |
2256 | [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, | |
2257 | [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, | |
2258 | [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, | |
2259 | [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, | |
2db134eb AA |
2260 | |
2261 | /* new operations for NFSv4.1 */ | |
cb73a9f4 | 2262 | [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, |
1d1bc8f2 | 2263 | [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, |
9064caae RD |
2264 | [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, |
2265 | [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, | |
2266 | [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, | |
e1ca12df | 2267 | [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, |
9064caae | 2268 | [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
9cf514cc CH |
2269 | #ifdef CONFIG_NFSD_PNFS |
2270 | [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_getdeviceinfo, | |
2271 | [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, | |
2272 | [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_layoutcommit, | |
2273 | [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_layoutget, | |
2274 | [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_layoutreturn, | |
2275 | #else | |
9064caae RD |
2276 | [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, |
2277 | [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, | |
2278 | [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, | |
2279 | [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, | |
2280 | [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, | |
9cf514cc | 2281 | #endif |
04f4ad16 | 2282 | [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, |
9064caae RD |
2283 | [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, |
2284 | [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, | |
17456804 | 2285 | [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, |
9064caae | 2286 | [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
345c2842 | 2287 | [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, |
4dc6ec00 | 2288 | [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, |
87a15a80 AS |
2289 | |
2290 | /* new operations for NFSv4.2 */ | |
95d871f0 | 2291 | [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, |
29ae7f9d | 2292 | [OP_COPY] = (nfsd4_dec)nfsd4_decode_copy, |
51911868 | 2293 | [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_copy_notify, |
b0cb9085 | 2294 | [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_fallocate, |
87a15a80 AS |
2295 | [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, |
2296 | [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, | |
2297 | [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, | |
885e2bf3 | 2298 | [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_offload_status, |
6308bc98 | 2299 | [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_offload_status, |
528b8493 | 2300 | [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_read, |
24bab491 | 2301 | [OP_SEEK] = (nfsd4_dec)nfsd4_decode_seek, |
87a15a80 | 2302 | [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, |
ffa0160a | 2303 | [OP_CLONE] = (nfsd4_dec)nfsd4_decode_clone, |
23e50fe3 FL |
2304 | /* RFC 8276 extended atributes operations */ |
2305 | [OP_GETXATTR] = (nfsd4_dec)nfsd4_decode_getxattr, | |
2306 | [OP_SETXATTR] = (nfsd4_dec)nfsd4_decode_setxattr, | |
2307 | [OP_LISTXATTRS] = (nfsd4_dec)nfsd4_decode_listxattrs, | |
2308 | [OP_REMOVEXATTR] = (nfsd4_dec)nfsd4_decode_removexattr, | |
2db134eb AA |
2309 | }; |
2310 | ||
e1a90ebd AS |
2311 | static inline bool |
2312 | nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) | |
2313 | { | |
8217d146 | 2314 | if (op->opnum < FIRST_NFS4_OP) |
e1a90ebd | 2315 | return false; |
8217d146 | 2316 | else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) |
e1a90ebd | 2317 | return false; |
8217d146 AS |
2318 | else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) |
2319 | return false; | |
2320 | else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) | |
e1a90ebd AS |
2321 | return false; |
2322 | return true; | |
2323 | } | |
f2feb96b | 2324 | |
d9b74bda | 2325 | static int |
1da177e4 LT |
2326 | nfsd4_decode_compound(struct nfsd4_compoundargs *argp) |
2327 | { | |
1da177e4 | 2328 | struct nfsd4_op *op; |
1091006c | 2329 | bool cachethis = false; |
a5cddc88 BF |
2330 | int auth_slack= argp->rqstp->rq_auth_slack; |
2331 | int max_reply = auth_slack + 8; /* opcnt, status */ | |
b0e35fda BF |
2332 | int readcount = 0; |
2333 | int readbytes = 0; | |
d9b74bda | 2334 | __be32 *p; |
1da177e4 LT |
2335 | int i; |
2336 | ||
d9b74bda CL |
2337 | if (xdr_stream_decode_u32(argp->xdr, &argp->taglen) < 0) |
2338 | return 0; | |
2339 | max_reply += XDR_UNIT; | |
2340 | argp->tag = NULL; | |
2341 | if (unlikely(argp->taglen)) { | |
2342 | if (argp->taglen > NFSD4_MAX_TAGLEN) | |
2343 | return 0; | |
2344 | p = xdr_inline_decode(argp->xdr, argp->taglen); | |
2345 | if (!p) | |
2346 | return 0; | |
7b723008 | 2347 | argp->tag = svcxdr_savemem(argp, p, argp->taglen); |
d9b74bda CL |
2348 | if (!argp->tag) |
2349 | return 0; | |
d9b74bda CL |
2350 | max_reply += xdr_align_size(argp->taglen); |
2351 | } | |
2352 | ||
2353 | if (xdr_stream_decode_u32(argp->xdr, &argp->minorversion) < 0) | |
2354 | return 0; | |
2355 | if (xdr_stream_decode_u32(argp->xdr, &argp->opcnt) < 0) | |
2356 | return 0; | |
2357 | ||
0078117c BF |
2358 | /* |
2359 | * NFS4ERR_RESOURCE is a more helpful error than GARBAGE_ARGS | |
2360 | * here, so we return success at the xdr level so that | |
2361 | * nfsd4_proc can handle this is an NFS-level error. | |
2362 | */ | |
2363 | if (argp->opcnt > NFSD_MAX_OPS_PER_COMPOUND) | |
d9b74bda | 2364 | return 1; |
1da177e4 | 2365 | |
e8c96f8c | 2366 | if (argp->opcnt > ARRAY_SIZE(argp->iops)) { |
5d6031ca | 2367 | argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); |
1da177e4 LT |
2368 | if (!argp->ops) { |
2369 | argp->ops = argp->iops; | |
817cb9d4 | 2370 | dprintk("nfsd: couldn't allocate room for COMPOUND\n"); |
d9b74bda | 2371 | return 0; |
1da177e4 LT |
2372 | } |
2373 | } | |
2374 | ||
e1a90ebd | 2375 | if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) |
30cff1ff BH |
2376 | argp->opcnt = 0; |
2377 | ||
1da177e4 LT |
2378 | for (i = 0; i < argp->opcnt; i++) { |
2379 | op = &argp->ops[i]; | |
2380 | op->replay = NULL; | |
2381 | ||
3a237b4a | 2382 | if (xdr_stream_decode_u32(argp->xdr, &op->opnum) < 0) |
d9b74bda | 2383 | return 0; |
08281341 | 2384 | if (nfsd4_opnum_in_range(argp, op)) { |
e1a90ebd | 2385 | op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); |
08281341 CL |
2386 | if (op->status != nfs_ok) |
2387 | trace_nfsd_compound_decode_err(argp->rqstp, | |
2388 | argp->opcnt, i, | |
2389 | op->opnum, | |
2390 | op->status); | |
2391 | } else { | |
1da177e4 LT |
2392 | op->opnum = OP_ILLEGAL; |
2393 | op->status = nfserr_op_illegal; | |
1da177e4 | 2394 | } |
f4f9ef4a | 2395 | op->opdesc = OPDESC(op); |
1091006c BF |
2396 | /* |
2397 | * We'll try to cache the result in the DRC if any one | |
2398 | * op in the compound wants to be cached: | |
2399 | */ | |
2400 | cachethis |= nfsd4_cache_this_op(op); | |
6ff40dec | 2401 | |
528b8493 | 2402 | if (op->opnum == OP_READ || op->opnum == OP_READ_PLUS) { |
b0e35fda BF |
2403 | readcount++; |
2404 | readbytes += nfsd4_max_reply(argp->rqstp, op); | |
2405 | } else | |
2406 | max_reply += nfsd4_max_reply(argp->rqstp, op); | |
f7b43d0c | 2407 | /* |
7323f0d2 KM |
2408 | * OP_LOCK and OP_LOCKT may return a conflicting lock. |
2409 | * (Special case because it will just skip encoding this | |
2410 | * if it runs out of xdr buffer space, and it is the only | |
2411 | * operation that behaves this way.) | |
f7b43d0c | 2412 | */ |
7323f0d2 | 2413 | if (op->opnum == OP_LOCK || op->opnum == OP_LOCKT) |
f7b43d0c | 2414 | max_reply += NFS4_OPAQUE_LIMIT; |
e372ba60 BF |
2415 | |
2416 | if (op->status) { | |
2417 | argp->opcnt = i+1; | |
2418 | break; | |
2419 | } | |
1da177e4 | 2420 | } |
1091006c BF |
2421 | /* Sessions make the DRC unnecessary: */ |
2422 | if (argp->minorversion) | |
2423 | cachethis = false; | |
b0e35fda | 2424 | svc_reserve(argp->rqstp, max_reply + readbytes); |
1091006c | 2425 | argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; |
1da177e4 | 2426 | |
a5cddc88 | 2427 | if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) |
779fb0f3 | 2428 | clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); |
b0e35fda | 2429 | |
d9b74bda | 2430 | return 1; |
1da177e4 | 2431 | } |
1da177e4 | 2432 | |
b8800921 N |
2433 | static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode, |
2434 | struct svc_export *exp) | |
c654b8a9 | 2435 | { |
b8800921 N |
2436 | if (exp->ex_flags & NFSEXP_V4ROOT) { |
2437 | *p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time)); | |
2438 | *p++ = 0; | |
70b87f77 | 2439 | } else |
39ca1bf6 | 2440 | p = xdr_encode_hyper(p, nfsd4_change_attribute(stat, inode)); |
d05d5744 | 2441 | return p; |
c654b8a9 BF |
2442 | } |
2443 | ||
16945141 BF |
2444 | /* |
2445 | * ctime (in NFSv4, time_metadata) is not writeable, and the client | |
2446 | * doesn't really care what resolution could theoretically be stored by | |
2447 | * the filesystem. | |
2448 | * | |
2449 | * The client cares how close together changes can be while still | |
2450 | * guaranteeing ctime changes. For most filesystems (which have | |
2451 | * timestamps with nanosecond fields) that is limited by the resolution | |
2452 | * of the time returned from current_time() (which I'm assuming to be | |
2453 | * 1/HZ). | |
2454 | */ | |
2455 | static __be32 *encode_time_delta(__be32 *p, struct inode *inode) | |
2456 | { | |
e4598e38 | 2457 | struct timespec64 ts; |
16945141 BF |
2458 | u32 ns; |
2459 | ||
2460 | ns = max_t(u32, NSEC_PER_SEC/HZ, inode->i_sb->s_time_gran); | |
e4598e38 | 2461 | ts = ns_to_timespec64(ns); |
16945141 BF |
2462 | |
2463 | p = xdr_encode_hyper(p, ts.tv_sec); | |
2464 | *p++ = cpu_to_be32(ts.tv_nsec); | |
2465 | ||
2466 | return p; | |
2467 | } | |
2468 | ||
d05d5744 | 2469 | static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) |
c654b8a9 | 2470 | { |
d05d5744 | 2471 | *p++ = cpu_to_be32(c->atomic); |
b2140338 BF |
2472 | p = xdr_encode_hyper(p, c->before_change); |
2473 | p = xdr_encode_hyper(p, c->after_change); | |
d05d5744 | 2474 | return p; |
c654b8a9 | 2475 | } |
1da177e4 | 2476 | |
81c3f413 | 2477 | /* Encode as an array of strings the string given with components |
e7a0444a | 2478 | * separated @sep, escaped with esc_enter and esc_exit. |
81c3f413 | 2479 | */ |
ddd1ea56 BF |
2480 | static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, |
2481 | char *components, char esc_enter, | |
2482 | char esc_exit) | |
81c3f413 | 2483 | { |
ddd1ea56 | 2484 | __be32 *p; |
082d4bd7 BF |
2485 | __be32 pathlen; |
2486 | int pathlen_offset; | |
81c3f413 | 2487 | int strlen, count=0; |
e7a0444a | 2488 | char *str, *end, *next; |
81c3f413 BF |
2489 | |
2490 | dprintk("nfsd4_encode_components(%s)\n", components); | |
082d4bd7 BF |
2491 | |
2492 | pathlen_offset = xdr->buf->len; | |
ddd1ea56 BF |
2493 | p = xdr_reserve_space(xdr, 4); |
2494 | if (!p) | |
81c3f413 | 2495 | return nfserr_resource; |
082d4bd7 BF |
2496 | p++; /* We will fill this in with @count later */ |
2497 | ||
81c3f413 BF |
2498 | end = str = components; |
2499 | while (*end) { | |
e7a0444a WAA |
2500 | bool found_esc = false; |
2501 | ||
2502 | /* try to parse as esc_start, ..., esc_end, sep */ | |
2503 | if (*str == esc_enter) { | |
2504 | for (; *end && (*end != esc_exit); end++) | |
2505 | /* find esc_exit or end of string */; | |
2506 | next = end + 1; | |
2507 | if (*end && (!*next || *next == sep)) { | |
2508 | str++; | |
2509 | found_esc = true; | |
2510 | } | |
2511 | } | |
2512 | ||
2513 | if (!found_esc) | |
2514 | for (; *end && (*end != sep); end++) | |
2515 | /* find sep or end of string */; | |
2516 | ||
81c3f413 BF |
2517 | strlen = end - str; |
2518 | if (strlen) { | |
ddd1ea56 BF |
2519 | p = xdr_reserve_space(xdr, strlen + 4); |
2520 | if (!p) | |
81c3f413 | 2521 | return nfserr_resource; |
0c0c267b | 2522 | p = xdr_encode_opaque(p, str, strlen); |
81c3f413 BF |
2523 | count++; |
2524 | } | |
2525 | else | |
2526 | end++; | |
5a64e569 BC |
2527 | if (found_esc) |
2528 | end = next; | |
2529 | ||
81c3f413 BF |
2530 | str = end; |
2531 | } | |
bf7491f1 | 2532 | pathlen = htonl(count); |
082d4bd7 | 2533 | write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); |
81c3f413 BF |
2534 | return 0; |
2535 | } | |
2536 | ||
e7a0444a WAA |
2537 | /* Encode as an array of strings the string given with components |
2538 | * separated @sep. | |
2539 | */ | |
ddd1ea56 BF |
2540 | static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, |
2541 | char *components) | |
e7a0444a | 2542 | { |
ddd1ea56 | 2543 | return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); |
e7a0444a WAA |
2544 | } |
2545 | ||
81c3f413 BF |
2546 | /* |
2547 | * encode a location element of a fs_locations structure | |
2548 | */ | |
ddd1ea56 BF |
2549 | static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, |
2550 | struct nfsd4_fs_location *location) | |
81c3f413 | 2551 | { |
b37ad28b | 2552 | __be32 status; |
81c3f413 | 2553 | |
ddd1ea56 | 2554 | status = nfsd4_encode_components_esc(xdr, ':', location->hosts, |
e7a0444a | 2555 | '[', ']'); |
81c3f413 BF |
2556 | if (status) |
2557 | return status; | |
ddd1ea56 | 2558 | status = nfsd4_encode_components(xdr, '/', location->path); |
81c3f413 BF |
2559 | if (status) |
2560 | return status; | |
81c3f413 BF |
2561 | return 0; |
2562 | } | |
2563 | ||
2564 | /* | |
ed748aac | 2565 | * Encode a path in RFC3530 'pathname4' format |
81c3f413 | 2566 | */ |
ddd1ea56 BF |
2567 | static __be32 nfsd4_encode_path(struct xdr_stream *xdr, |
2568 | const struct path *root, | |
2569 | const struct path *path) | |
81c3f413 | 2570 | { |
301f0268 | 2571 | struct path cur = *path; |
ddd1ea56 | 2572 | __be32 *p; |
ed748aac TM |
2573 | struct dentry **components = NULL; |
2574 | unsigned int ncomponents = 0; | |
2575 | __be32 err = nfserr_jukebox; | |
81c3f413 | 2576 | |
ed748aac | 2577 | dprintk("nfsd4_encode_components("); |
81c3f413 | 2578 | |
ed748aac TM |
2579 | path_get(&cur); |
2580 | /* First walk the path up to the nfsd root, and store the | |
2581 | * dentries/path components in an array. | |
2582 | */ | |
2583 | for (;;) { | |
b77a4b2e | 2584 | if (path_equal(&cur, root)) |
ed748aac TM |
2585 | break; |
2586 | if (cur.dentry == cur.mnt->mnt_root) { | |
2587 | if (follow_up(&cur)) | |
2588 | continue; | |
2589 | goto out_free; | |
2590 | } | |
2591 | if ((ncomponents & 15) == 0) { | |
2592 | struct dentry **new; | |
2593 | new = krealloc(components, | |
2594 | sizeof(*new) * (ncomponents + 16), | |
2595 | GFP_KERNEL); | |
2596 | if (!new) | |
2597 | goto out_free; | |
2598 | components = new; | |
2599 | } | |
2600 | components[ncomponents++] = cur.dentry; | |
2601 | cur.dentry = dget_parent(cur.dentry); | |
2602 | } | |
ddd1ea56 BF |
2603 | err = nfserr_resource; |
2604 | p = xdr_reserve_space(xdr, 4); | |
2605 | if (!p) | |
ed748aac | 2606 | goto out_free; |
c373b0a4 | 2607 | *p++ = cpu_to_be32(ncomponents); |
ed748aac TM |
2608 | |
2609 | while (ncomponents) { | |
2610 | struct dentry *dentry = components[ncomponents - 1]; | |
301f0268 | 2611 | unsigned int len; |
ed748aac | 2612 | |
301f0268 AV |
2613 | spin_lock(&dentry->d_lock); |
2614 | len = dentry->d_name.len; | |
ddd1ea56 BF |
2615 | p = xdr_reserve_space(xdr, len + 4); |
2616 | if (!p) { | |
301f0268 | 2617 | spin_unlock(&dentry->d_lock); |
ed748aac | 2618 | goto out_free; |
301f0268 | 2619 | } |
0c0c267b | 2620 | p = xdr_encode_opaque(p, dentry->d_name.name, len); |
a455589f | 2621 | dprintk("/%pd", dentry); |
301f0268 | 2622 | spin_unlock(&dentry->d_lock); |
ed748aac TM |
2623 | dput(dentry); |
2624 | ncomponents--; | |
81c3f413 | 2625 | } |
ed748aac | 2626 | |
ed748aac TM |
2627 | err = 0; |
2628 | out_free: | |
2629 | dprintk(")\n"); | |
2630 | while (ncomponents) | |
2631 | dput(components[--ncomponents]); | |
2632 | kfree(components); | |
2633 | path_put(&cur); | |
2634 | return err; | |
2635 | } | |
2636 | ||
ddd1ea56 BF |
2637 | static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, |
2638 | struct svc_rqst *rqstp, const struct path *path) | |
ed748aac TM |
2639 | { |
2640 | struct svc_export *exp_ps; | |
2641 | __be32 res; | |
2642 | ||
2643 | exp_ps = rqst_find_fsidzero_export(rqstp); | |
2644 | if (IS_ERR(exp_ps)) | |
2645 | return nfserrno(PTR_ERR(exp_ps)); | |
ddd1ea56 | 2646 | res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); |
ed748aac TM |
2647 | exp_put(exp_ps); |
2648 | return res; | |
81c3f413 BF |
2649 | } |
2650 | ||
2651 | /* | |
2652 | * encode a fs_locations structure | |
2653 | */ | |
ddd1ea56 BF |
2654 | static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, |
2655 | struct svc_rqst *rqstp, struct svc_export *exp) | |
81c3f413 | 2656 | { |
b37ad28b | 2657 | __be32 status; |
cc45f017 | 2658 | int i; |
ddd1ea56 | 2659 | __be32 *p; |
81c3f413 | 2660 | struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; |
81c3f413 | 2661 | |
ddd1ea56 | 2662 | status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); |
81c3f413 BF |
2663 | if (status) |
2664 | return status; | |
ddd1ea56 BF |
2665 | p = xdr_reserve_space(xdr, 4); |
2666 | if (!p) | |
81c3f413 | 2667 | return nfserr_resource; |
c373b0a4 | 2668 | *p++ = cpu_to_be32(fslocs->locations_count); |
81c3f413 | 2669 | for (i=0; i<fslocs->locations_count; i++) { |
ddd1ea56 | 2670 | status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); |
81c3f413 BF |
2671 | if (status) |
2672 | return status; | |
2673 | } | |
81c3f413 BF |
2674 | return 0; |
2675 | } | |
1da177e4 | 2676 | |
3d2544b1 BF |
2677 | static u32 nfs4_file_type(umode_t mode) |
2678 | { | |
2679 | switch (mode & S_IFMT) { | |
2680 | case S_IFIFO: return NF4FIFO; | |
2681 | case S_IFCHR: return NF4CHR; | |
2682 | case S_IFDIR: return NF4DIR; | |
2683 | case S_IFBLK: return NF4BLK; | |
2684 | case S_IFLNK: return NF4LNK; | |
2685 | case S_IFREG: return NF4REG; | |
2686 | case S_IFSOCK: return NF4SOCK; | |
2687 | default: return NF4BAD; | |
25fef48b | 2688 | } |
3d2544b1 | 2689 | } |
1da177e4 | 2690 | |
b37ad28b | 2691 | static inline __be32 |
ddd1ea56 BF |
2692 | nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
2693 | struct nfs4_ace *ace) | |
1da177e4 | 2694 | { |
3554116d | 2695 | if (ace->whotype != NFS4_ACL_WHO_NAMED) |
ddd1ea56 | 2696 | return nfs4_acl_write_who(xdr, ace->whotype); |
3554116d | 2697 | else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
ddd1ea56 | 2698 | return nfsd4_encode_group(xdr, rqstp, ace->who_gid); |
3554116d | 2699 | else |
ddd1ea56 | 2700 | return nfsd4_encode_user(xdr, rqstp, ace->who_uid); |
1da177e4 LT |
2701 | } |
2702 | ||
6896f15a | 2703 | static inline __be32 |
8a4c3926 | 2704 | nfsd4_encode_layout_types(struct xdr_stream *xdr, u32 layout_types) |
6896f15a | 2705 | { |
8a4c3926 JL |
2706 | __be32 *p; |
2707 | unsigned long i = hweight_long(layout_types); | |
6896f15a | 2708 | |
8a4c3926 JL |
2709 | p = xdr_reserve_space(xdr, 4 + 4 * i); |
2710 | if (!p) | |
2711 | return nfserr_resource; | |
2712 | ||
2713 | *p++ = cpu_to_be32(i); | |
2714 | ||
2715 | for (i = LAYOUT_NFSV4_1_FILES; i < LAYOUT_TYPE_MAX; ++i) | |
2716 | if (layout_types & (1 << i)) | |
2717 | *p++ = cpu_to_be32(i); | |
6896f15a KM |
2718 | |
2719 | return 0; | |
2720 | } | |
2721 | ||
42ca0993 BF |
2722 | #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ |
2723 | FATTR4_WORD0_RDATTR_ERROR) | |
2724 | #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID | |
c2227a39 | 2725 | #define WORD2_ABSENT_FS_ATTRS 0 |
42ca0993 | 2726 | |
18032ca0 DQ |
2727 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
2728 | static inline __be32 | |
ddd1ea56 BF |
2729 | nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
2730 | void *context, int len) | |
18032ca0 | 2731 | { |
ddd1ea56 | 2732 | __be32 *p; |
18032ca0 | 2733 | |
ddd1ea56 BF |
2734 | p = xdr_reserve_space(xdr, len + 4 + 4 + 4); |
2735 | if (!p) | |
18032ca0 DQ |
2736 | return nfserr_resource; |
2737 | ||
2738 | /* | |
2739 | * For now we use a 0 here to indicate the null translation; in | |
2740 | * the future we may place a call to translation code here. | |
2741 | */ | |
c373b0a4 BF |
2742 | *p++ = cpu_to_be32(0); /* lfs */ |
2743 | *p++ = cpu_to_be32(0); /* pi */ | |
18032ca0 | 2744 | p = xdr_encode_opaque(p, context, len); |
18032ca0 DQ |
2745 | return 0; |
2746 | } | |
2747 | #else | |
2748 | static inline __be32 | |
ddd1ea56 BF |
2749 | nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
2750 | void *context, int len) | |
18032ca0 DQ |
2751 | { return 0; } |
2752 | #endif | |
2753 | ||
c2227a39 | 2754 | static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *bmval2, u32 *rdattr_err) |
42ca0993 BF |
2755 | { |
2756 | /* As per referral draft: */ | |
2757 | if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || | |
2758 | *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { | |
2759 | if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || | |
2760 | *bmval0 & FATTR4_WORD0_FS_LOCATIONS) | |
2761 | *rdattr_err = NFSERR_MOVED; | |
2762 | else | |
2763 | return nfserr_moved; | |
2764 | } | |
2765 | *bmval0 &= WORD0_ABSENT_FS_ATTRS; | |
2766 | *bmval1 &= WORD1_ABSENT_FS_ATTRS; | |
c2227a39 | 2767 | *bmval2 &= WORD2_ABSENT_FS_ATTRS; |
42ca0993 BF |
2768 | return 0; |
2769 | } | |
1da177e4 | 2770 | |
ae7095a7 BF |
2771 | |
2772 | static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) | |
2773 | { | |
2774 | struct path path = exp->ex_path; | |
2775 | int err; | |
2776 | ||
2777 | path_get(&path); | |
2778 | while (follow_up(&path)) { | |
2779 | if (path.dentry != path.mnt->mnt_root) | |
2780 | break; | |
2781 | } | |
a528d35e | 2782 | err = vfs_getattr(&path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); |
ae7095a7 BF |
2783 | path_put(&path); |
2784 | return err; | |
2785 | } | |
2786 | ||
75976de6 KM |
2787 | static __be32 |
2788 | nfsd4_encode_bitmap(struct xdr_stream *xdr, u32 bmval0, u32 bmval1, u32 bmval2) | |
2789 | { | |
2790 | __be32 *p; | |
2791 | ||
2792 | if (bmval2) { | |
2793 | p = xdr_reserve_space(xdr, 16); | |
2794 | if (!p) | |
2795 | goto out_resource; | |
2796 | *p++ = cpu_to_be32(3); | |
2797 | *p++ = cpu_to_be32(bmval0); | |
2798 | *p++ = cpu_to_be32(bmval1); | |
2799 | *p++ = cpu_to_be32(bmval2); | |
2800 | } else if (bmval1) { | |
2801 | p = xdr_reserve_space(xdr, 12); | |
2802 | if (!p) | |
2803 | goto out_resource; | |
2804 | *p++ = cpu_to_be32(2); | |
2805 | *p++ = cpu_to_be32(bmval0); | |
2806 | *p++ = cpu_to_be32(bmval1); | |
2807 | } else { | |
2808 | p = xdr_reserve_space(xdr, 8); | |
2809 | if (!p) | |
2810 | goto out_resource; | |
2811 | *p++ = cpu_to_be32(1); | |
2812 | *p++ = cpu_to_be32(bmval0); | |
2813 | } | |
2814 | ||
2815 | return 0; | |
2816 | out_resource: | |
2817 | return nfserr_resource; | |
2818 | } | |
2819 | ||
1da177e4 LT |
2820 | /* |
2821 | * Note: @fhp can be NULL; in this case, we might have to compose the filehandle | |
2822 | * ourselves. | |
1da177e4 | 2823 | */ |
da2ebce6 | 2824 | static __be32 |
d5184658 BF |
2825 | nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, |
2826 | struct svc_export *exp, | |
2827 | struct dentry *dentry, u32 *bmval, | |
406a7ea9 | 2828 | struct svc_rqst *rqstp, int ignore_crossmnt) |
1da177e4 LT |
2829 | { |
2830 | u32 bmval0 = bmval[0]; | |
2831 | u32 bmval1 = bmval[1]; | |
7e705706 | 2832 | u32 bmval2 = bmval[2]; |
1da177e4 | 2833 | struct kstat stat; |
d50e6136 | 2834 | struct svc_fh *tempfh = NULL; |
1da177e4 | 2835 | struct kstatfs statfs; |
ddd1ea56 | 2836 | __be32 *p; |
1fcea5b2 | 2837 | int starting_len = xdr->buf->len; |
082d4bd7 BF |
2838 | int attrlen_offset; |
2839 | __be32 attrlen; | |
1da177e4 LT |
2840 | u32 dummy; |
2841 | u64 dummy64; | |
42ca0993 | 2842 | u32 rdattr_err = 0; |
b37ad28b | 2843 | __be32 status; |
b8dd7b9a | 2844 | int err; |
1da177e4 | 2845 | struct nfs4_acl *acl = NULL; |
0ab88ca4 | 2846 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
18032ca0 DQ |
2847 | void *context = NULL; |
2848 | int contextlen; | |
0ab88ca4 | 2849 | #endif |
18032ca0 | 2850 | bool contextsupport = false; |
7e705706 AA |
2851 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
2852 | u32 minorversion = resp->cstate.minorversion; | |
ebabe9a9 CH |
2853 | struct path path = { |
2854 | .mnt = exp->ex_path.mnt, | |
2855 | .dentry = dentry, | |
2856 | }; | |
3d733711 | 2857 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
2858 | |
2859 | BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); | |
916d2d84 | 2860 | BUG_ON(!nfsd_attrs_supported(minorversion, bmval)); |
1da177e4 | 2861 | |
42ca0993 | 2862 | if (exp->ex_fslocs.migrated) { |
c2227a39 | 2863 | status = fattr_handle_absent_fs(&bmval0, &bmval1, &bmval2, &rdattr_err); |
42ca0993 BF |
2864 | if (status) |
2865 | goto out; | |
2866 | } | |
2867 | ||
a528d35e | 2868 | err = vfs_getattr(&path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); |
b8dd7b9a | 2869 | if (err) |
1da177e4 | 2870 | goto out_nfserr; |
12337901 CH |
2871 | if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | |
2872 | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || | |
1da177e4 LT |
2873 | (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | |
2874 | FATTR4_WORD1_SPACE_TOTAL))) { | |
ebabe9a9 | 2875 | err = vfs_statfs(&path, &statfs); |
b8dd7b9a | 2876 | if (err) |
1da177e4 LT |
2877 | goto out_nfserr; |
2878 | } | |
2879 | if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { | |
d50e6136 BF |
2880 | tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); |
2881 | status = nfserr_jukebox; | |
2882 | if (!tempfh) | |
2883 | goto out; | |
2884 | fh_init(tempfh, NFS4_FHSIZE); | |
2885 | status = fh_compose(tempfh, exp, dentry, NULL); | |
1da177e4 LT |
2886 | if (status) |
2887 | goto out; | |
d50e6136 | 2888 | fhp = tempfh; |
1da177e4 | 2889 | } |
0c9d65e7 | 2890 | if (bmval0 & FATTR4_WORD0_ACL) { |
b8dd7b9a | 2891 | err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); |
0c9d65e7 AG |
2892 | if (err == -EOPNOTSUPP) |
2893 | bmval0 &= ~FATTR4_WORD0_ACL; | |
2894 | else if (err == -EINVAL) { | |
2895 | status = nfserr_attrnotsupp; | |
2896 | goto out; | |
2897 | } else if (err != 0) | |
2898 | goto out_nfserr; | |
1da177e4 | 2899 | } |
1da177e4 | 2900 | |
18032ca0 | 2901 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
c2227a39 KM |
2902 | if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) || |
2903 | bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { | |
32ddd944 BF |
2904 | if (exp->ex_flags & NFSEXP_SECURITY_LABEL) |
2905 | err = security_inode_getsecctx(d_inode(dentry), | |
18032ca0 | 2906 | &context, &contextlen); |
32ddd944 BF |
2907 | else |
2908 | err = -EOPNOTSUPP; | |
18032ca0 DQ |
2909 | contextsupport = (err == 0); |
2910 | if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { | |
2911 | if (err == -EOPNOTSUPP) | |
2912 | bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; | |
2913 | else if (err) | |
2914 | goto out_nfserr; | |
2915 | } | |
2916 | } | |
2917 | #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ | |
2918 | ||
75976de6 KM |
2919 | status = nfsd4_encode_bitmap(xdr, bmval0, bmval1, bmval2); |
2920 | if (status) | |
2921 | goto out; | |
082d4bd7 BF |
2922 | |
2923 | attrlen_offset = xdr->buf->len; | |
ddd1ea56 BF |
2924 | p = xdr_reserve_space(xdr, 4); |
2925 | if (!p) | |
2926 | goto out_resource; | |
082d4bd7 | 2927 | p++; /* to be backfilled later */ |
1da177e4 LT |
2928 | |
2929 | if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { | |
dcd20869 BF |
2930 | u32 supp[3]; |
2931 | ||
2932 | memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); | |
7e705706 | 2933 | |
0c9d65e7 | 2934 | if (!IS_POSIXACL(dentry->d_inode)) |
916d2d84 | 2935 | supp[0] &= ~FATTR4_WORD0_ACL; |
18032ca0 | 2936 | if (!contextsupport) |
916d2d84 BF |
2937 | supp[2] &= ~FATTR4_WORD2_SECURITY_LABEL; |
2938 | if (!supp[2]) { | |
ddd1ea56 BF |
2939 | p = xdr_reserve_space(xdr, 12); |
2940 | if (!p) | |
2b44f1ba | 2941 | goto out_resource; |
c373b0a4 | 2942 | *p++ = cpu_to_be32(2); |
916d2d84 BF |
2943 | *p++ = cpu_to_be32(supp[0]); |
2944 | *p++ = cpu_to_be32(supp[1]); | |
7e705706 | 2945 | } else { |
ddd1ea56 BF |
2946 | p = xdr_reserve_space(xdr, 16); |
2947 | if (!p) | |
2b44f1ba | 2948 | goto out_resource; |
c373b0a4 | 2949 | *p++ = cpu_to_be32(3); |
916d2d84 BF |
2950 | *p++ = cpu_to_be32(supp[0]); |
2951 | *p++ = cpu_to_be32(supp[1]); | |
2952 | *p++ = cpu_to_be32(supp[2]); | |
7e705706 | 2953 | } |
1da177e4 LT |
2954 | } |
2955 | if (bmval0 & FATTR4_WORD0_TYPE) { | |
ddd1ea56 BF |
2956 | p = xdr_reserve_space(xdr, 4); |
2957 | if (!p) | |
1da177e4 | 2958 | goto out_resource; |
3d2544b1 | 2959 | dummy = nfs4_file_type(stat.mode); |
6b6d8137 BF |
2960 | if (dummy == NF4BAD) { |
2961 | status = nfserr_serverfault; | |
2962 | goto out; | |
2963 | } | |
c373b0a4 | 2964 | *p++ = cpu_to_be32(dummy); |
1da177e4 LT |
2965 | } |
2966 | if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { | |
ddd1ea56 BF |
2967 | p = xdr_reserve_space(xdr, 4); |
2968 | if (!p) | |
1da177e4 | 2969 | goto out_resource; |
49640001 | 2970 | if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) |
c373b0a4 | 2971 | *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); |
49640001 | 2972 | else |
c373b0a4 BF |
2973 | *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| |
2974 | NFS4_FH_VOL_RENAME); | |
1da177e4 LT |
2975 | } |
2976 | if (bmval0 & FATTR4_WORD0_CHANGE) { | |
ddd1ea56 BF |
2977 | p = xdr_reserve_space(xdr, 8); |
2978 | if (!p) | |
1da177e4 | 2979 | goto out_resource; |
b8800921 | 2980 | p = encode_change(p, &stat, d_inode(dentry), exp); |
1da177e4 LT |
2981 | } |
2982 | if (bmval0 & FATTR4_WORD0_SIZE) { | |
ddd1ea56 BF |
2983 | p = xdr_reserve_space(xdr, 8); |
2984 | if (!p) | |
1da177e4 | 2985 | goto out_resource; |
b64c7f3b | 2986 | p = xdr_encode_hyper(p, stat.size); |
1da177e4 LT |
2987 | } |
2988 | if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { | |
ddd1ea56 BF |
2989 | p = xdr_reserve_space(xdr, 4); |
2990 | if (!p) | |
1da177e4 | 2991 | goto out_resource; |
c373b0a4 | 2992 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2993 | } |
2994 | if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { | |
ddd1ea56 BF |
2995 | p = xdr_reserve_space(xdr, 4); |
2996 | if (!p) | |
1da177e4 | 2997 | goto out_resource; |
c373b0a4 | 2998 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2999 | } |
3000 | if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { | |
ddd1ea56 BF |
3001 | p = xdr_reserve_space(xdr, 4); |
3002 | if (!p) | |
1da177e4 | 3003 | goto out_resource; |
c373b0a4 | 3004 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
3005 | } |
3006 | if (bmval0 & FATTR4_WORD0_FSID) { | |
ddd1ea56 BF |
3007 | p = xdr_reserve_space(xdr, 16); |
3008 | if (!p) | |
1da177e4 | 3009 | goto out_resource; |
42ca0993 | 3010 | if (exp->ex_fslocs.migrated) { |
b64c7f3b BF |
3011 | p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); |
3012 | p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); | |
af6a4e28 N |
3013 | } else switch(fsid_source(fhp)) { |
3014 | case FSIDSOURCE_FSID: | |
b64c7f3b BF |
3015 | p = xdr_encode_hyper(p, (u64)exp->ex_fsid); |
3016 | p = xdr_encode_hyper(p, (u64)0); | |
af6a4e28 N |
3017 | break; |
3018 | case FSIDSOURCE_DEV: | |
c373b0a4 BF |
3019 | *p++ = cpu_to_be32(0); |
3020 | *p++ = cpu_to_be32(MAJOR(stat.dev)); | |
3021 | *p++ = cpu_to_be32(0); | |
3022 | *p++ = cpu_to_be32(MINOR(stat.dev)); | |
af6a4e28 N |
3023 | break; |
3024 | case FSIDSOURCE_UUID: | |
94eb3689 KM |
3025 | p = xdr_encode_opaque_fixed(p, exp->ex_uuid, |
3026 | EX_UUID_LEN); | |
af6a4e28 | 3027 | break; |
1da177e4 LT |
3028 | } |
3029 | } | |
3030 | if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { | |
ddd1ea56 BF |
3031 | p = xdr_reserve_space(xdr, 4); |
3032 | if (!p) | |
1da177e4 | 3033 | goto out_resource; |
c373b0a4 | 3034 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
3035 | } |
3036 | if (bmval0 & FATTR4_WORD0_LEASE_TIME) { | |
ddd1ea56 BF |
3037 | p = xdr_reserve_space(xdr, 4); |
3038 | if (!p) | |
1da177e4 | 3039 | goto out_resource; |
c373b0a4 | 3040 | *p++ = cpu_to_be32(nn->nfsd4_lease); |
1da177e4 LT |
3041 | } |
3042 | if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { | |
ddd1ea56 BF |
3043 | p = xdr_reserve_space(xdr, 4); |
3044 | if (!p) | |
1da177e4 | 3045 | goto out_resource; |
c373b0a4 | 3046 | *p++ = cpu_to_be32(rdattr_err); |
1da177e4 LT |
3047 | } |
3048 | if (bmval0 & FATTR4_WORD0_ACL) { | |
3049 | struct nfs4_ace *ace; | |
1da177e4 LT |
3050 | |
3051 | if (acl == NULL) { | |
ddd1ea56 BF |
3052 | p = xdr_reserve_space(xdr, 4); |
3053 | if (!p) | |
1da177e4 LT |
3054 | goto out_resource; |
3055 | ||
c373b0a4 | 3056 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
3057 | goto out_acl; |
3058 | } | |
ddd1ea56 BF |
3059 | p = xdr_reserve_space(xdr, 4); |
3060 | if (!p) | |
1da177e4 | 3061 | goto out_resource; |
c373b0a4 | 3062 | *p++ = cpu_to_be32(acl->naces); |
1da177e4 | 3063 | |
28e05dd8 | 3064 | for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { |
ddd1ea56 BF |
3065 | p = xdr_reserve_space(xdr, 4*3); |
3066 | if (!p) | |
1da177e4 | 3067 | goto out_resource; |
c373b0a4 BF |
3068 | *p++ = cpu_to_be32(ace->type); |
3069 | *p++ = cpu_to_be32(ace->flag); | |
3070 | *p++ = cpu_to_be32(ace->access_mask & | |
3071 | NFS4_ACE_MASK_ALL); | |
ddd1ea56 | 3072 | status = nfsd4_encode_aclname(xdr, rqstp, ace); |
1da177e4 LT |
3073 | if (status) |
3074 | goto out; | |
3075 | } | |
3076 | } | |
3077 | out_acl: | |
3078 | if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { | |
ddd1ea56 BF |
3079 | p = xdr_reserve_space(xdr, 4); |
3080 | if (!p) | |
1da177e4 | 3081 | goto out_resource; |
0c9d65e7 | 3082 | *p++ = cpu_to_be32(IS_POSIXACL(dentry->d_inode) ? |
1da177e4 LT |
3083 | ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); |
3084 | } | |
3085 | if (bmval0 & FATTR4_WORD0_CANSETTIME) { | |
ddd1ea56 BF |
3086 | p = xdr_reserve_space(xdr, 4); |
3087 | if (!p) | |
1da177e4 | 3088 | goto out_resource; |
c373b0a4 | 3089 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
3090 | } |
3091 | if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { | |
ddd1ea56 BF |
3092 | p = xdr_reserve_space(xdr, 4); |
3093 | if (!p) | |
1da177e4 | 3094 | goto out_resource; |
c373b0a4 | 3095 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
3096 | } |
3097 | if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { | |
ddd1ea56 BF |
3098 | p = xdr_reserve_space(xdr, 4); |
3099 | if (!p) | |
1da177e4 | 3100 | goto out_resource; |
c373b0a4 | 3101 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
3102 | } |
3103 | if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { | |
ddd1ea56 BF |
3104 | p = xdr_reserve_space(xdr, 4); |
3105 | if (!p) | |
1da177e4 | 3106 | goto out_resource; |
c373b0a4 | 3107 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
3108 | } |
3109 | if (bmval0 & FATTR4_WORD0_FILEHANDLE) { | |
ddd1ea56 BF |
3110 | p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); |
3111 | if (!p) | |
1da177e4 | 3112 | goto out_resource; |
0c0c267b BF |
3113 | p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, |
3114 | fhp->fh_handle.fh_size); | |
1da177e4 LT |
3115 | } |
3116 | if (bmval0 & FATTR4_WORD0_FILEID) { | |
ddd1ea56 BF |
3117 | p = xdr_reserve_space(xdr, 8); |
3118 | if (!p) | |
1da177e4 | 3119 | goto out_resource; |
b64c7f3b | 3120 | p = xdr_encode_hyper(p, stat.ino); |
1da177e4 LT |
3121 | } |
3122 | if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { | |
ddd1ea56 BF |
3123 | p = xdr_reserve_space(xdr, 8); |
3124 | if (!p) | |
1da177e4 | 3125 | goto out_resource; |
b64c7f3b | 3126 | p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
1da177e4 LT |
3127 | } |
3128 | if (bmval0 & FATTR4_WORD0_FILES_FREE) { | |
ddd1ea56 BF |
3129 | p = xdr_reserve_space(xdr, 8); |
3130 | if (!p) | |
1da177e4 | 3131 | goto out_resource; |
b64c7f3b | 3132 | p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
1da177e4 LT |
3133 | } |
3134 | if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { | |
ddd1ea56 BF |
3135 | p = xdr_reserve_space(xdr, 8); |
3136 | if (!p) | |
1da177e4 | 3137 | goto out_resource; |
b64c7f3b | 3138 | p = xdr_encode_hyper(p, (u64) statfs.f_files); |
1da177e4 | 3139 | } |
81c3f413 | 3140 | if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { |
ddd1ea56 | 3141 | status = nfsd4_encode_fs_locations(xdr, rqstp, exp); |
81c3f413 BF |
3142 | if (status) |
3143 | goto out; | |
3144 | } | |
1da177e4 | 3145 | if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { |
ddd1ea56 BF |
3146 | p = xdr_reserve_space(xdr, 4); |
3147 | if (!p) | |
1da177e4 | 3148 | goto out_resource; |
c373b0a4 | 3149 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
3150 | } |
3151 | if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { | |
ddd1ea56 BF |
3152 | p = xdr_reserve_space(xdr, 8); |
3153 | if (!p) | |
1da177e4 | 3154 | goto out_resource; |
b64c7f3b | 3155 | p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); |
1da177e4 LT |
3156 | } |
3157 | if (bmval0 & FATTR4_WORD0_MAXLINK) { | |
ddd1ea56 BF |
3158 | p = xdr_reserve_space(xdr, 4); |
3159 | if (!p) | |
1da177e4 | 3160 | goto out_resource; |
c373b0a4 | 3161 | *p++ = cpu_to_be32(255); |
1da177e4 LT |
3162 | } |
3163 | if (bmval0 & FATTR4_WORD0_MAXNAME) { | |
ddd1ea56 BF |
3164 | p = xdr_reserve_space(xdr, 4); |
3165 | if (!p) | |
1da177e4 | 3166 | goto out_resource; |
c373b0a4 | 3167 | *p++ = cpu_to_be32(statfs.f_namelen); |
1da177e4 LT |
3168 | } |
3169 | if (bmval0 & FATTR4_WORD0_MAXREAD) { | |
ddd1ea56 BF |
3170 | p = xdr_reserve_space(xdr, 8); |
3171 | if (!p) | |
1da177e4 | 3172 | goto out_resource; |
b64c7f3b | 3173 | p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
1da177e4 LT |
3174 | } |
3175 | if (bmval0 & FATTR4_WORD0_MAXWRITE) { | |
ddd1ea56 BF |
3176 | p = xdr_reserve_space(xdr, 8); |
3177 | if (!p) | |
1da177e4 | 3178 | goto out_resource; |
b64c7f3b | 3179 | p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
1da177e4 LT |
3180 | } |
3181 | if (bmval1 & FATTR4_WORD1_MODE) { | |
ddd1ea56 BF |
3182 | p = xdr_reserve_space(xdr, 4); |
3183 | if (!p) | |
1da177e4 | 3184 | goto out_resource; |
c373b0a4 | 3185 | *p++ = cpu_to_be32(stat.mode & S_IALLUGO); |
1da177e4 LT |
3186 | } |
3187 | if (bmval1 & FATTR4_WORD1_NO_TRUNC) { | |
ddd1ea56 BF |
3188 | p = xdr_reserve_space(xdr, 4); |
3189 | if (!p) | |
1da177e4 | 3190 | goto out_resource; |
c373b0a4 | 3191 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
3192 | } |
3193 | if (bmval1 & FATTR4_WORD1_NUMLINKS) { | |
ddd1ea56 BF |
3194 | p = xdr_reserve_space(xdr, 4); |
3195 | if (!p) | |
1da177e4 | 3196 | goto out_resource; |
c373b0a4 | 3197 | *p++ = cpu_to_be32(stat.nlink); |
1da177e4 LT |
3198 | } |
3199 | if (bmval1 & FATTR4_WORD1_OWNER) { | |
ddd1ea56 | 3200 | status = nfsd4_encode_user(xdr, rqstp, stat.uid); |
1da177e4 LT |
3201 | if (status) |
3202 | goto out; | |
3203 | } | |
3204 | if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { | |
ddd1ea56 | 3205 | status = nfsd4_encode_group(xdr, rqstp, stat.gid); |
1da177e4 LT |
3206 | if (status) |
3207 | goto out; | |
3208 | } | |
3209 | if (bmval1 & FATTR4_WORD1_RAWDEV) { | |
ddd1ea56 BF |
3210 | p = xdr_reserve_space(xdr, 8); |
3211 | if (!p) | |
1da177e4 | 3212 | goto out_resource; |
c373b0a4 BF |
3213 | *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); |
3214 | *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); | |
1da177e4 LT |
3215 | } |
3216 | if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { | |
ddd1ea56 BF |
3217 | p = xdr_reserve_space(xdr, 8); |
3218 | if (!p) | |
1da177e4 LT |
3219 | goto out_resource; |
3220 | dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; | |
b64c7f3b | 3221 | p = xdr_encode_hyper(p, dummy64); |
1da177e4 LT |
3222 | } |
3223 | if (bmval1 & FATTR4_WORD1_SPACE_FREE) { | |
ddd1ea56 BF |
3224 | p = xdr_reserve_space(xdr, 8); |
3225 | if (!p) | |
1da177e4 LT |
3226 | goto out_resource; |
3227 | dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; | |
b64c7f3b | 3228 | p = xdr_encode_hyper(p, dummy64); |
1da177e4 LT |
3229 | } |
3230 | if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { | |
ddd1ea56 BF |
3231 | p = xdr_reserve_space(xdr, 8); |
3232 | if (!p) | |
1da177e4 LT |
3233 | goto out_resource; |
3234 | dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; | |
b64c7f3b | 3235 | p = xdr_encode_hyper(p, dummy64); |
1da177e4 LT |
3236 | } |
3237 | if (bmval1 & FATTR4_WORD1_SPACE_USED) { | |
ddd1ea56 BF |
3238 | p = xdr_reserve_space(xdr, 8); |
3239 | if (!p) | |
1da177e4 LT |
3240 | goto out_resource; |
3241 | dummy64 = (u64)stat.blocks << 9; | |
b64c7f3b | 3242 | p = xdr_encode_hyper(p, dummy64); |
1da177e4 LT |
3243 | } |
3244 | if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { | |
ddd1ea56 BF |
3245 | p = xdr_reserve_space(xdr, 12); |
3246 | if (!p) | |
1da177e4 | 3247 | goto out_resource; |
b64c7f3b | 3248 | p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); |
c373b0a4 | 3249 | *p++ = cpu_to_be32(stat.atime.tv_nsec); |
1da177e4 LT |
3250 | } |
3251 | if (bmval1 & FATTR4_WORD1_TIME_DELTA) { | |
ddd1ea56 BF |
3252 | p = xdr_reserve_space(xdr, 12); |
3253 | if (!p) | |
1da177e4 | 3254 | goto out_resource; |
16945141 | 3255 | p = encode_time_delta(p, d_inode(dentry)); |
1da177e4 LT |
3256 | } |
3257 | if (bmval1 & FATTR4_WORD1_TIME_METADATA) { | |
ddd1ea56 BF |
3258 | p = xdr_reserve_space(xdr, 12); |
3259 | if (!p) | |
1da177e4 | 3260 | goto out_resource; |
b64c7f3b | 3261 | p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); |
c373b0a4 | 3262 | *p++ = cpu_to_be32(stat.ctime.tv_nsec); |
1da177e4 LT |
3263 | } |
3264 | if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { | |
ddd1ea56 BF |
3265 | p = xdr_reserve_space(xdr, 12); |
3266 | if (!p) | |
1da177e4 | 3267 | goto out_resource; |
b64c7f3b | 3268 | p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); |
c373b0a4 | 3269 | *p++ = cpu_to_be32(stat.mtime.tv_nsec); |
1da177e4 LT |
3270 | } |
3271 | if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { | |
0a2050d7 KM |
3272 | struct kstat parent_stat; |
3273 | u64 ino = stat.ino; | |
3274 | ||
ddd1ea56 BF |
3275 | p = xdr_reserve_space(xdr, 8); |
3276 | if (!p) | |
1da177e4 | 3277 | goto out_resource; |
406a7ea9 FF |
3278 | /* |
3279 | * Get parent's attributes if not ignoring crossmount | |
3280 | * and this is the root of a cross-mounted filesystem. | |
3281 | */ | |
3282 | if (ignore_crossmnt == 0 && | |
0a2050d7 KM |
3283 | dentry == exp->ex_path.mnt->mnt_root) { |
3284 | err = get_parent_attributes(exp, &parent_stat); | |
3285 | if (err) | |
3286 | goto out_nfserr; | |
3287 | ino = parent_stat.ino; | |
3288 | } | |
3289 | p = xdr_encode_hyper(p, ino); | |
1da177e4 | 3290 | } |
9cf514cc | 3291 | #ifdef CONFIG_NFSD_PNFS |
6896f15a | 3292 | if (bmval1 & FATTR4_WORD1_FS_LAYOUT_TYPES) { |
8a4c3926 | 3293 | status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); |
6896f15a KM |
3294 | if (status) |
3295 | goto out; | |
3296 | } | |
3297 | ||
3298 | if (bmval2 & FATTR4_WORD2_LAYOUT_TYPES) { | |
8a4c3926 | 3299 | status = nfsd4_encode_layout_types(xdr, exp->ex_layout_types); |
6896f15a KM |
3300 | if (status) |
3301 | goto out; | |
9cf514cc CH |
3302 | } |
3303 | ||
3304 | if (bmval2 & FATTR4_WORD2_LAYOUT_BLKSIZE) { | |
3305 | p = xdr_reserve_space(xdr, 4); | |
3306 | if (!p) | |
3307 | goto out_resource; | |
3308 | *p++ = cpu_to_be32(stat.blksize); | |
3309 | } | |
3310 | #endif /* CONFIG_NFSD_PNFS */ | |
8c18f205 | 3311 | if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { |
b26b78cb TM |
3312 | u32 supp[3]; |
3313 | ||
3314 | memcpy(supp, nfsd_suppattrs[minorversion], sizeof(supp)); | |
3315 | supp[0] &= NFSD_SUPPATTR_EXCLCREAT_WORD0; | |
3316 | supp[1] &= NFSD_SUPPATTR_EXCLCREAT_WORD1; | |
3317 | supp[2] &= NFSD_SUPPATTR_EXCLCREAT_WORD2; | |
3318 | ||
3319 | status = nfsd4_encode_bitmap(xdr, supp[0], supp[1], supp[2]); | |
75976de6 KM |
3320 | if (status) |
3321 | goto out; | |
8c18f205 | 3322 | } |
7e705706 | 3323 | |
0ab88ca4 | 3324 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
7d580722 KM |
3325 | if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
3326 | status = nfsd4_encode_security_label(xdr, rqstp, context, | |
3327 | contextlen); | |
3328 | if (status) | |
3329 | goto out; | |
3330 | } | |
0ab88ca4 | 3331 | #endif |
7d580722 | 3332 | |
0e885e84 FL |
3333 | if (bmval2 & FATTR4_WORD2_XATTR_SUPPORT) { |
3334 | p = xdr_reserve_space(xdr, 4); | |
3335 | if (!p) | |
3336 | goto out_resource; | |
3337 | err = xattr_supported_namespace(d_inode(dentry), | |
3338 | XATTR_USER_PREFIX); | |
3339 | *p++ = cpu_to_be32(err == 0); | |
3340 | } | |
3341 | ||
082d4bd7 BF |
3342 | attrlen = htonl(xdr->buf->len - attrlen_offset - 4); |
3343 | write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); | |
1da177e4 LT |
3344 | status = nfs_ok; |
3345 | ||
3346 | out: | |
ba4e55bb | 3347 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
18032ca0 DQ |
3348 | if (context) |
3349 | security_release_secctx(context, contextlen); | |
ba4e55bb | 3350 | #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ |
28e05dd8 | 3351 | kfree(acl); |
18df11d0 | 3352 | if (tempfh) { |
d50e6136 | 3353 | fh_put(tempfh); |
18df11d0 YZ |
3354 | kfree(tempfh); |
3355 | } | |
1fcea5b2 BF |
3356 | if (status) |
3357 | xdr_truncate_encode(xdr, starting_len); | |
1da177e4 LT |
3358 | return status; |
3359 | out_nfserr: | |
b8dd7b9a | 3360 | status = nfserrno(err); |
1da177e4 LT |
3361 | goto out; |
3362 | out_resource: | |
1da177e4 LT |
3363 | status = nfserr_resource; |
3364 | goto out; | |
1da177e4 LT |
3365 | } |
3366 | ||
2825a7f9 BF |
3367 | static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, |
3368 | struct xdr_buf *buf, __be32 *p, int bytes) | |
3369 | { | |
3370 | xdr->scratch.iov_len = 0; | |
3371 | memset(buf, 0, sizeof(struct xdr_buf)); | |
3372 | buf->head[0].iov_base = p; | |
3373 | buf->head[0].iov_len = 0; | |
3374 | buf->len = 0; | |
3375 | xdr->buf = buf; | |
3376 | xdr->iov = buf->head; | |
3377 | xdr->p = p; | |
3378 | xdr->end = (void *)p + bytes; | |
3379 | buf->buflen = bytes; | |
3380 | } | |
3381 | ||
d5184658 BF |
3382 | __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, |
3383 | struct svc_fh *fhp, struct svc_export *exp, | |
3384 | struct dentry *dentry, u32 *bmval, | |
3385 | struct svc_rqst *rqstp, int ignore_crossmnt) | |
3386 | { | |
2825a7f9 | 3387 | struct xdr_buf dummy; |
d5184658 BF |
3388 | struct xdr_stream xdr; |
3389 | __be32 ret; | |
3390 | ||
2825a7f9 | 3391 | svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); |
d5184658 BF |
3392 | ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, |
3393 | ignore_crossmnt); | |
3394 | *p = xdr.p; | |
3395 | return ret; | |
3396 | } | |
3397 | ||
c0ce6ec8 BF |
3398 | static inline int attributes_need_mount(u32 *bmval) |
3399 | { | |
3400 | if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) | |
3401 | return 1; | |
3402 | if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) | |
3403 | return 1; | |
3404 | return 0; | |
3405 | } | |
3406 | ||
b37ad28b | 3407 | static __be32 |
561f0ed4 BF |
3408 | nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, |
3409 | const char *name, int namlen) | |
1da177e4 LT |
3410 | { |
3411 | struct svc_export *exp = cd->rd_fhp->fh_export; | |
3412 | struct dentry *dentry; | |
b37ad28b | 3413 | __be32 nfserr; |
406a7ea9 | 3414 | int ignore_crossmnt = 0; |
1da177e4 | 3415 | |
6c2d4798 | 3416 | dentry = lookup_positive_unlocked(name, cd->rd_fhp->fh_dentry, namlen); |
1da177e4 LT |
3417 | if (IS_ERR(dentry)) |
3418 | return nfserrno(PTR_ERR(dentry)); | |
3419 | ||
3420 | exp_get(exp); | |
406a7ea9 FF |
3421 | /* |
3422 | * In the case of a mountpoint, the client may be asking for | |
3423 | * attributes that are only properties of the underlying filesystem | |
3424 | * as opposed to the cross-mounted file system. In such a case, | |
3425 | * we will not follow the cross mount and will fill the attribtutes | |
3426 | * directly from the mountpoint dentry. | |
3427 | */ | |
3227fa41 | 3428 | if (nfsd_mountpoint(dentry, exp)) { |
021d3a72 BF |
3429 | int err; |
3430 | ||
3227fa41 BF |
3431 | if (!(exp->ex_flags & NFSEXP_V4ROOT) |
3432 | && !attributes_need_mount(cd->rd_bmval)) { | |
3433 | ignore_crossmnt = 1; | |
3434 | goto out_encode; | |
3435 | } | |
dcb488a3 AA |
3436 | /* |
3437 | * Why the heck aren't we just using nfsd_lookup?? | |
3438 | * Different "."/".." handling? Something else? | |
3439 | * At least, add a comment here to explain.... | |
3440 | */ | |
021d3a72 BF |
3441 | err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); |
3442 | if (err) { | |
3443 | nfserr = nfserrno(err); | |
1da177e4 LT |
3444 | goto out_put; |
3445 | } | |
dcb488a3 AA |
3446 | nfserr = check_nfsd_access(exp, cd->rd_rqstp); |
3447 | if (nfserr) | |
3448 | goto out_put; | |
1da177e4 LT |
3449 | |
3450 | } | |
3227fa41 | 3451 | out_encode: |
561f0ed4 | 3452 | nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, |
406a7ea9 | 3453 | cd->rd_rqstp, ignore_crossmnt); |
1da177e4 LT |
3454 | out_put: |
3455 | dput(dentry); | |
3456 | exp_put(exp); | |
3457 | return nfserr; | |
3458 | } | |
3459 | ||
2ebbc012 | 3460 | static __be32 * |
561f0ed4 | 3461 | nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) |
1da177e4 | 3462 | { |
561f0ed4 BF |
3463 | __be32 *p; |
3464 | ||
c3a45617 | 3465 | p = xdr_reserve_space(xdr, 20); |
561f0ed4 | 3466 | if (!p) |
1da177e4 LT |
3467 | return NULL; |
3468 | *p++ = htonl(2); | |
3469 | *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ | |
3470 | *p++ = htonl(0); /* bmval1 */ | |
3471 | ||
87915c64 | 3472 | *p++ = htonl(4); /* attribute length */ |
1da177e4 | 3473 | *p++ = nfserr; /* no htonl */ |
1da177e4 LT |
3474 | return p; |
3475 | } | |
3476 | ||
3477 | static int | |
a0ad13ef N |
3478 | nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, |
3479 | loff_t offset, u64 ino, unsigned int d_type) | |
1da177e4 | 3480 | { |
a0ad13ef | 3481 | struct readdir_cd *ccd = ccdv; |
1da177e4 | 3482 | struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); |
561f0ed4 BF |
3483 | struct xdr_stream *xdr = cd->xdr; |
3484 | int start_offset = xdr->buf->len; | |
3485 | int cookie_offset; | |
aee37764 | 3486 | u32 name_and_cookie; |
561f0ed4 | 3487 | int entry_bytes; |
b37ad28b | 3488 | __be32 nfserr = nfserr_toosmall; |
561f0ed4 BF |
3489 | __be64 wire_offset; |
3490 | __be32 *p; | |
1da177e4 LT |
3491 | |
3492 | /* In nfsv4, "." and ".." never make it onto the wire.. */ | |
3493 | if (name && isdotent(name, namlen)) { | |
3494 | cd->common.err = nfs_ok; | |
3495 | return 0; | |
3496 | } | |
3497 | ||
561f0ed4 BF |
3498 | if (cd->cookie_offset) { |
3499 | wire_offset = cpu_to_be64(offset); | |
3500 | write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, | |
3501 | &wire_offset, 8); | |
3502 | } | |
1da177e4 | 3503 | |
561f0ed4 BF |
3504 | p = xdr_reserve_space(xdr, 4); |
3505 | if (!p) | |
1da177e4 | 3506 | goto fail; |
1da177e4 | 3507 | *p++ = xdr_one; /* mark entry present */ |
561f0ed4 BF |
3508 | cookie_offset = xdr->buf->len; |
3509 | p = xdr_reserve_space(xdr, 3*4 + namlen); | |
3510 | if (!p) | |
3511 | goto fail; | |
1da177e4 LT |
3512 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ |
3513 | p = xdr_encode_array(p, name, namlen); /* name length & name */ | |
3514 | ||
561f0ed4 | 3515 | nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); |
1da177e4 LT |
3516 | switch (nfserr) { |
3517 | case nfs_ok: | |
1da177e4 LT |
3518 | break; |
3519 | case nfserr_resource: | |
3520 | nfserr = nfserr_toosmall; | |
3521 | goto fail; | |
b2c0cea6 | 3522 | case nfserr_noent: |
f41c5ad2 | 3523 | xdr_truncate_encode(xdr, start_offset); |
b2c0cea6 | 3524 | goto skip_entry; |
1da177e4 LT |
3525 | default: |
3526 | /* | |
3527 | * If the client requested the RDATTR_ERROR attribute, | |
3528 | * we stuff the error code into this attribute | |
3529 | * and continue. If this attribute was not requested, | |
3530 | * then in accordance with the spec, we fail the | |
3531 | * entire READDIR operation(!) | |
3532 | */ | |
3533 | if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) | |
3534 | goto fail; | |
561f0ed4 | 3535 | p = nfsd4_encode_rdattr_error(xdr, nfserr); |
34081efc FI |
3536 | if (p == NULL) { |
3537 | nfserr = nfserr_toosmall; | |
1da177e4 | 3538 | goto fail; |
34081efc | 3539 | } |
1da177e4 | 3540 | } |
561f0ed4 BF |
3541 | nfserr = nfserr_toosmall; |
3542 | entry_bytes = xdr->buf->len - start_offset; | |
3543 | if (entry_bytes > cd->rd_maxcount) | |
3544 | goto fail; | |
3545 | cd->rd_maxcount -= entry_bytes; | |
aee37764 BF |
3546 | /* |
3547 | * RFC 3530 14.2.24 describes rd_dircount as only a "hint", so | |
3548 | * let's always let through the first entry, at least: | |
3549 | */ | |
0ec016e3 BF |
3550 | if (!cd->rd_dircount) |
3551 | goto fail; | |
3552 | name_and_cookie = 4 + 4 * XDR_QUADLEN(namlen) + 8; | |
aee37764 BF |
3553 | if (name_and_cookie > cd->rd_dircount && cd->cookie_offset) |
3554 | goto fail; | |
3555 | cd->rd_dircount -= min(cd->rd_dircount, name_and_cookie); | |
0ec016e3 | 3556 | |
561f0ed4 | 3557 | cd->cookie_offset = cookie_offset; |
b2c0cea6 | 3558 | skip_entry: |
1da177e4 LT |
3559 | cd->common.err = nfs_ok; |
3560 | return 0; | |
3561 | fail: | |
561f0ed4 | 3562 | xdr_truncate_encode(xdr, start_offset); |
1da177e4 LT |
3563 | cd->common.err = nfserr; |
3564 | return -EINVAL; | |
3565 | } | |
3566 | ||
d0a381dd BF |
3567 | static __be32 |
3568 | nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) | |
e2f282b9 | 3569 | { |
bc749ca4 | 3570 | __be32 *p; |
e2f282b9 | 3571 | |
d0a381dd BF |
3572 | p = xdr_reserve_space(xdr, sizeof(stateid_t)); |
3573 | if (!p) | |
3574 | return nfserr_resource; | |
c373b0a4 | 3575 | *p++ = cpu_to_be32(sid->si_generation); |
0c0c267b BF |
3576 | p = xdr_encode_opaque_fixed(p, &sid->si_opaque, |
3577 | sizeof(stateid_opaque_t)); | |
d0a381dd | 3578 | return 0; |
e2f282b9 BH |
3579 | } |
3580 | ||
695e12f8 | 3581 | static __be32 |
b37ad28b | 3582 | nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) |
1da177e4 | 3583 | { |
d0a381dd | 3584 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3585 | __be32 *p; |
1da177e4 | 3586 | |
bac966d6 BF |
3587 | p = xdr_reserve_space(xdr, 8); |
3588 | if (!p) | |
3589 | return nfserr_resource; | |
3590 | *p++ = cpu_to_be32(access->ac_supported); | |
3591 | *p++ = cpu_to_be32(access->ac_resp_access); | |
3592 | return 0; | |
1da177e4 LT |
3593 | } |
3594 | ||
1d1bc8f2 BF |
3595 | static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) |
3596 | { | |
d0a381dd | 3597 | struct xdr_stream *xdr = &resp->xdr; |
1d1bc8f2 BF |
3598 | __be32 *p; |
3599 | ||
bac966d6 BF |
3600 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); |
3601 | if (!p) | |
3602 | return nfserr_resource; | |
3603 | p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, | |
3604 | NFS4_MAX_SESSIONID_LEN); | |
3605 | *p++ = cpu_to_be32(bcts->dir); | |
3606 | /* Upshifting from TCP to RDMA is not supported */ | |
3607 | *p++ = cpu_to_be32(0); | |
3608 | return 0; | |
1d1bc8f2 BF |
3609 | } |
3610 | ||
695e12f8 | 3611 | static __be32 |
b37ad28b | 3612 | nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) |
1da177e4 | 3613 | { |
d0a381dd BF |
3614 | struct xdr_stream *xdr = &resp->xdr; |
3615 | ||
bac966d6 | 3616 | return nfsd4_encode_stateid(xdr, &close->cl_stateid); |
1da177e4 LT |
3617 | } |
3618 | ||
3619 | ||
695e12f8 | 3620 | static __be32 |
b37ad28b | 3621 | nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) |
1da177e4 | 3622 | { |
d0a381dd | 3623 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3624 | __be32 *p; |
1da177e4 | 3625 | |
bac966d6 BF |
3626 | p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
3627 | if (!p) | |
3628 | return nfserr_resource; | |
3629 | p = xdr_encode_opaque_fixed(p, commit->co_verf.data, | |
0c0c267b | 3630 | NFS4_VERIFIER_SIZE); |
bac966d6 | 3631 | return 0; |
1da177e4 LT |
3632 | } |
3633 | ||
695e12f8 | 3634 | static __be32 |
b37ad28b | 3635 | nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) |
1da177e4 | 3636 | { |
d0a381dd | 3637 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3638 | __be32 *p; |
1da177e4 | 3639 | |
bac966d6 BF |
3640 | p = xdr_reserve_space(xdr, 20); |
3641 | if (!p) | |
3642 | return nfserr_resource; | |
3643 | encode_cinfo(p, &create->cr_cinfo); | |
b96811cd | 3644 | return nfsd4_encode_bitmap(xdr, create->cr_bmval[0], |
bac966d6 | 3645 | create->cr_bmval[1], create->cr_bmval[2]); |
1da177e4 LT |
3646 | } |
3647 | ||
b37ad28b AV |
3648 | static __be32 |
3649 | nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) | |
1da177e4 LT |
3650 | { |
3651 | struct svc_fh *fhp = getattr->ga_fhp; | |
d5184658 | 3652 | struct xdr_stream *xdr = &resp->xdr; |
1da177e4 | 3653 | |
bac966d6 BF |
3654 | return nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, |
3655 | getattr->ga_bmval, resp->rqstp, 0); | |
1da177e4 LT |
3656 | } |
3657 | ||
695e12f8 BH |
3658 | static __be32 |
3659 | nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) | |
1da177e4 | 3660 | { |
d0a381dd | 3661 | struct xdr_stream *xdr = &resp->xdr; |
695e12f8 | 3662 | struct svc_fh *fhp = *fhpp; |
1da177e4 | 3663 | unsigned int len; |
bc749ca4 | 3664 | __be32 *p; |
1da177e4 | 3665 | |
bac966d6 BF |
3666 | len = fhp->fh_handle.fh_size; |
3667 | p = xdr_reserve_space(xdr, len + 4); | |
3668 | if (!p) | |
3669 | return nfserr_resource; | |
3670 | p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); | |
3671 | return 0; | |
1da177e4 LT |
3672 | } |
3673 | ||
3674 | /* | |
3675 | * Including all fields other than the name, a LOCK4denied structure requires | |
3676 | * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. | |
3677 | */ | |
d0a381dd BF |
3678 | static __be32 |
3679 | nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) | |
1da177e4 | 3680 | { |
7c13f344 | 3681 | struct xdr_netobj *conf = &ld->ld_owner; |
bc749ca4 | 3682 | __be32 *p; |
1da177e4 | 3683 | |
8c7424cf | 3684 | again: |
d0a381dd | 3685 | p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); |
8c7424cf BF |
3686 | if (!p) { |
3687 | /* | |
3688 | * Don't fail to return the result just because we can't | |
3689 | * return the conflicting open: | |
3690 | */ | |
3691 | if (conf->len) { | |
f98bac5a | 3692 | kfree(conf->data); |
8c7424cf BF |
3693 | conf->len = 0; |
3694 | conf->data = NULL; | |
3695 | goto again; | |
3696 | } | |
d0a381dd | 3697 | return nfserr_resource; |
8c7424cf | 3698 | } |
b64c7f3b BF |
3699 | p = xdr_encode_hyper(p, ld->ld_start); |
3700 | p = xdr_encode_hyper(p, ld->ld_length); | |
c373b0a4 | 3701 | *p++ = cpu_to_be32(ld->ld_type); |
7c13f344 | 3702 | if (conf->len) { |
0c0c267b BF |
3703 | p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); |
3704 | p = xdr_encode_opaque(p, conf->data, conf->len); | |
f98bac5a | 3705 | kfree(conf->data); |
1da177e4 | 3706 | } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ |
b64c7f3b | 3707 | p = xdr_encode_hyper(p, (u64)0); /* clientid */ |
c373b0a4 | 3708 | *p++ = cpu_to_be32(0); /* length of owner name */ |
1da177e4 | 3709 | } |
d0a381dd | 3710 | return nfserr_denied; |
1da177e4 LT |
3711 | } |
3712 | ||
695e12f8 | 3713 | static __be32 |
b37ad28b | 3714 | nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) |
1da177e4 | 3715 | { |
d0a381dd BF |
3716 | struct xdr_stream *xdr = &resp->xdr; |
3717 | ||
e2f282b9 | 3718 | if (!nfserr) |
d0a381dd | 3719 | nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); |
e2f282b9 | 3720 | else if (nfserr == nfserr_denied) |
d0a381dd | 3721 | nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); |
f98bac5a | 3722 | |
695e12f8 | 3723 | return nfserr; |
1da177e4 LT |
3724 | } |
3725 | ||
695e12f8 | 3726 | static __be32 |
b37ad28b | 3727 | nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) |
1da177e4 | 3728 | { |
d0a381dd BF |
3729 | struct xdr_stream *xdr = &resp->xdr; |
3730 | ||
1da177e4 | 3731 | if (nfserr == nfserr_denied) |
d0a381dd | 3732 | nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); |
695e12f8 | 3733 | return nfserr; |
1da177e4 LT |
3734 | } |
3735 | ||
695e12f8 | 3736 | static __be32 |
b37ad28b | 3737 | nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) |
1da177e4 | 3738 | { |
d0a381dd BF |
3739 | struct xdr_stream *xdr = &resp->xdr; |
3740 | ||
bac966d6 | 3741 | return nfsd4_encode_stateid(xdr, &locku->lu_stateid); |
1da177e4 LT |
3742 | } |
3743 | ||
3744 | ||
695e12f8 | 3745 | static __be32 |
b37ad28b | 3746 | nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) |
1da177e4 | 3747 | { |
d0a381dd | 3748 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3749 | __be32 *p; |
1da177e4 | 3750 | |
bac966d6 BF |
3751 | p = xdr_reserve_space(xdr, 20); |
3752 | if (!p) | |
3753 | return nfserr_resource; | |
3754 | p = encode_cinfo(p, &link->li_cinfo); | |
3755 | return 0; | |
1da177e4 LT |
3756 | } |
3757 | ||
3758 | ||
695e12f8 | 3759 | static __be32 |
b37ad28b | 3760 | nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) |
1da177e4 | 3761 | { |
d0a381dd | 3762 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3763 | __be32 *p; |
1da177e4 | 3764 | |
d0a381dd BF |
3765 | nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); |
3766 | if (nfserr) | |
bac966d6 | 3767 | return nfserr; |
75976de6 | 3768 | p = xdr_reserve_space(xdr, 24); |
d0a381dd BF |
3769 | if (!p) |
3770 | return nfserr_resource; | |
d05d5744 | 3771 | p = encode_cinfo(p, &open->op_cinfo); |
c373b0a4 | 3772 | *p++ = cpu_to_be32(open->op_rflags); |
1da177e4 | 3773 | |
75976de6 KM |
3774 | nfserr = nfsd4_encode_bitmap(xdr, open->op_bmval[0], open->op_bmval[1], |
3775 | open->op_bmval[2]); | |
3776 | if (nfserr) | |
bac966d6 | 3777 | return nfserr; |
75976de6 KM |
3778 | |
3779 | p = xdr_reserve_space(xdr, 4); | |
3780 | if (!p) | |
3781 | return nfserr_resource; | |
3782 | ||
3783 | *p++ = cpu_to_be32(open->op_delegate_type); | |
1da177e4 LT |
3784 | switch (open->op_delegate_type) { |
3785 | case NFS4_OPEN_DELEGATE_NONE: | |
3786 | break; | |
3787 | case NFS4_OPEN_DELEGATE_READ: | |
d0a381dd BF |
3788 | nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
3789 | if (nfserr) | |
3790 | return nfserr; | |
3791 | p = xdr_reserve_space(xdr, 20); | |
3792 | if (!p) | |
3793 | return nfserr_resource; | |
c373b0a4 | 3794 | *p++ = cpu_to_be32(open->op_recall); |
1da177e4 LT |
3795 | |
3796 | /* | |
3797 | * TODO: ACE's in delegations | |
3798 | */ | |
c373b0a4 BF |
3799 | *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
3800 | *p++ = cpu_to_be32(0); | |
3801 | *p++ = cpu_to_be32(0); | |
3802 | *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ | |
1da177e4 LT |
3803 | break; |
3804 | case NFS4_OPEN_DELEGATE_WRITE: | |
d0a381dd BF |
3805 | nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
3806 | if (nfserr) | |
3807 | return nfserr; | |
3808 | p = xdr_reserve_space(xdr, 32); | |
3809 | if (!p) | |
3810 | return nfserr_resource; | |
c373b0a4 | 3811 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
3812 | |
3813 | /* | |
3814 | * TODO: space_limit's in delegations | |
3815 | */ | |
c373b0a4 BF |
3816 | *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); |
3817 | *p++ = cpu_to_be32(~(u32)0); | |
3818 | *p++ = cpu_to_be32(~(u32)0); | |
1da177e4 LT |
3819 | |
3820 | /* | |
3821 | * TODO: ACE's in delegations | |
3822 | */ | |
c373b0a4 BF |
3823 | *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
3824 | *p++ = cpu_to_be32(0); | |
3825 | *p++ = cpu_to_be32(0); | |
3826 | *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ | |
1da177e4 | 3827 | break; |
d24433cd BH |
3828 | case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ |
3829 | switch (open->op_why_no_deleg) { | |
3830 | case WND4_CONTENTION: | |
3831 | case WND4_RESOURCE: | |
d0a381dd BF |
3832 | p = xdr_reserve_space(xdr, 8); |
3833 | if (!p) | |
3834 | return nfserr_resource; | |
c373b0a4 BF |
3835 | *p++ = cpu_to_be32(open->op_why_no_deleg); |
3836 | /* deleg signaling not supported yet: */ | |
3837 | *p++ = cpu_to_be32(0); | |
d24433cd BH |
3838 | break; |
3839 | default: | |
d0a381dd BF |
3840 | p = xdr_reserve_space(xdr, 4); |
3841 | if (!p) | |
3842 | return nfserr_resource; | |
c373b0a4 | 3843 | *p++ = cpu_to_be32(open->op_why_no_deleg); |
d24433cd | 3844 | } |
d24433cd | 3845 | break; |
1da177e4 LT |
3846 | default: |
3847 | BUG(); | |
3848 | } | |
3849 | /* XXX save filehandle here */ | |
bac966d6 | 3850 | return 0; |
1da177e4 LT |
3851 | } |
3852 | ||
695e12f8 | 3853 | static __be32 |
b37ad28b | 3854 | nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) |
1da177e4 | 3855 | { |
d0a381dd BF |
3856 | struct xdr_stream *xdr = &resp->xdr; |
3857 | ||
bac966d6 | 3858 | return nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); |
1da177e4 LT |
3859 | } |
3860 | ||
695e12f8 | 3861 | static __be32 |
b37ad28b | 3862 | nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) |
1da177e4 | 3863 | { |
d0a381dd BF |
3864 | struct xdr_stream *xdr = &resp->xdr; |
3865 | ||
bac966d6 | 3866 | return nfsd4_encode_stateid(xdr, &od->od_stateid); |
1da177e4 LT |
3867 | } |
3868 | ||
dc97618d BF |
3869 | static __be32 nfsd4_encode_splice_read( |
3870 | struct nfsd4_compoundres *resp, | |
3871 | struct nfsd4_read *read, | |
3872 | struct file *file, unsigned long maxcount) | |
1da177e4 | 3873 | { |
ddd1ea56 | 3874 | struct xdr_stream *xdr = &resp->xdr; |
34a78b48 | 3875 | struct xdr_buf *buf = xdr->buf; |
76e5492b | 3876 | int status, space_left; |
dc97618d | 3877 | u32 eof; |
dc97618d | 3878 | __be32 nfserr; |
fec25fa4 | 3879 | __be32 *p = xdr->p - 2; |
1da177e4 | 3880 | |
d5d5c304 KM |
3881 | /* Make sure there will be room for padding if needed */ |
3882 | if (xdr->end - xdr->p < 1) | |
d0a381dd | 3883 | return nfserr_resource; |
dc97618d | 3884 | |
87c5942e | 3885 | nfserr = nfsd_splice_read(read->rd_rqstp, read->rd_fhp, |
83a63072 | 3886 | file, read->rd_offset, &maxcount, &eof); |
87c5942e | 3887 | read->rd_length = maxcount; |
76e5492b CL |
3888 | if (nfserr) |
3889 | goto out_err; | |
3890 | status = svc_encode_result_payload(read->rd_rqstp, | |
3891 | buf->head[0].iov_len, maxcount); | |
3892 | if (status) { | |
3893 | nfserr = nfserrno(status); | |
3894 | goto out_err; | |
b0e35fda | 3895 | } |
1da177e4 | 3896 | |
fec25fa4 BF |
3897 | *(p++) = htonl(eof); |
3898 | *(p++) = htonl(maxcount); | |
dc97618d | 3899 | |
34a78b48 BF |
3900 | buf->page_len = maxcount; |
3901 | buf->len += maxcount; | |
15b23ef5 BF |
3902 | xdr->page_ptr += (buf->page_base + maxcount + PAGE_SIZE - 1) |
3903 | / PAGE_SIZE; | |
dc97618d BF |
3904 | |
3905 | /* Use rest of head for padding and remaining ops: */ | |
34a78b48 BF |
3906 | buf->tail[0].iov_base = xdr->p; |
3907 | buf->tail[0].iov_len = 0; | |
fec25fa4 | 3908 | xdr->iov = buf->tail; |
dc97618d | 3909 | if (maxcount&3) { |
fec25fa4 BF |
3910 | int pad = 4 - (maxcount&3); |
3911 | ||
3912 | *(xdr->p++) = 0; | |
3913 | ||
34a78b48 | 3914 | buf->tail[0].iov_base += maxcount&3; |
fec25fa4 BF |
3915 | buf->tail[0].iov_len = pad; |
3916 | buf->len += pad; | |
b0e35fda | 3917 | } |
2825a7f9 | 3918 | |
dc97618d | 3919 | space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, |
34a78b48 BF |
3920 | buf->buflen - buf->len); |
3921 | buf->buflen = buf->len + space_left; | |
dc97618d BF |
3922 | xdr->end = (__be32 *)((void *)xdr->end + space_left); |
3923 | ||
3924 | return 0; | |
76e5492b CL |
3925 | |
3926 | out_err: | |
3927 | /* | |
3928 | * nfsd_splice_actor may have already messed with the | |
3929 | * page length; reset it so as not to confuse | |
3930 | * xdr_truncate_encode in our caller. | |
3931 | */ | |
3932 | buf->page_len = 0; | |
3933 | return nfserr; | |
dc97618d BF |
3934 | } |
3935 | ||
3936 | static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, | |
3937 | struct nfsd4_read *read, | |
3938 | struct file *file, unsigned long maxcount) | |
3939 | { | |
3940 | struct xdr_stream *xdr = &resp->xdr; | |
3941 | u32 eof; | |
dc97618d | 3942 | int starting_len = xdr->buf->len - 8; |
dc97618d BF |
3943 | __be32 nfserr; |
3944 | __be32 tmp; | |
b0420980 | 3945 | int pad; |
1da177e4 | 3946 | |
403217f3 AS |
3947 | read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, maxcount); |
3948 | if (read->rd_vlen < 0) | |
3949 | return nfserr_resource; | |
1da177e4 | 3950 | |
87c5942e | 3951 | nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset, |
83a63072 TM |
3952 | resp->rqstp->rq_vec, read->rd_vlen, &maxcount, |
3953 | &eof); | |
87c5942e | 3954 | read->rd_length = maxcount; |
dc97618d | 3955 | if (nfserr) |
1da177e4 | 3956 | return nfserr; |
03493bca | 3957 | if (svc_encode_result_payload(resp->rqstp, starting_len + 8, maxcount)) |
41205539 | 3958 | return nfserr_io; |
7dcf4ab9 | 3959 | xdr_truncate_encode(xdr, starting_len + 8 + xdr_align_size(maxcount)); |
dc97618d | 3960 | |
dc97618d BF |
3961 | tmp = htonl(eof); |
3962 | write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); | |
3963 | tmp = htonl(maxcount); | |
3964 | write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); | |
3965 | ||
7dcf4ab9 | 3966 | tmp = xdr_zero; |
b0420980 BF |
3967 | pad = (maxcount&3) ? 4 - (maxcount&3) : 0; |
3968 | write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, | |
7dcf4ab9 | 3969 | &tmp, pad); |
1da177e4 | 3970 | return 0; |
dc97618d BF |
3971 | |
3972 | } | |
3973 | ||
3974 | static __be32 | |
3975 | nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, | |
3976 | struct nfsd4_read *read) | |
3977 | { | |
3978 | unsigned long maxcount; | |
3979 | struct xdr_stream *xdr = &resp->xdr; | |
5c4583b2 | 3980 | struct file *file; |
dc97618d | 3981 | int starting_len = xdr->buf->len; |
dc97618d | 3982 | __be32 *p; |
dc97618d | 3983 | |
5c4583b2 JL |
3984 | if (nfserr) |
3985 | return nfserr; | |
3986 | file = read->rd_nf->nf_file; | |
3987 | ||
dc97618d BF |
3988 | p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ |
3989 | if (!p) { | |
779fb0f3 | 3990 | WARN_ON_ONCE(test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)); |
bac966d6 | 3991 | return nfserr_resource; |
dc97618d | 3992 | } |
68e8bb03 CH |
3993 | if (resp->xdr.buf->page_len && |
3994 | test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) { | |
b0420980 | 3995 | WARN_ON_ONCE(1); |
bac966d6 | 3996 | return nfserr_resource; |
dc97618d | 3997 | } |
dc97618d BF |
3998 | xdr_commit_encode(xdr); |
3999 | ||
4000 | maxcount = svc_max_payload(resp->rqstp); | |
68e8bb03 CH |
4001 | maxcount = min_t(unsigned long, maxcount, |
4002 | (xdr->buf->buflen - xdr->buf->len)); | |
3c7aa15d | 4003 | maxcount = min_t(unsigned long, maxcount, read->rd_length); |
dc97618d | 4004 | |
68e8bb03 CH |
4005 | if (file->f_op->splice_read && |
4006 | test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags)) | |
96bcad50 | 4007 | nfserr = nfsd4_encode_splice_read(resp, read, file, maxcount); |
dc97618d | 4008 | else |
96bcad50 | 4009 | nfserr = nfsd4_encode_readv(resp, read, file, maxcount); |
dc97618d | 4010 | |
96bcad50 | 4011 | if (nfserr) |
dc97618d | 4012 | xdr_truncate_encode(xdr, starting_len); |
96bcad50 | 4013 | |
96bcad50 | 4014 | return nfserr; |
1da177e4 LT |
4015 | } |
4016 | ||
b37ad28b AV |
4017 | static __be32 |
4018 | nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) | |
1da177e4 LT |
4019 | { |
4020 | int maxcount; | |
476a7b1f BF |
4021 | __be32 wire_count; |
4022 | int zero = 0; | |
ddd1ea56 | 4023 | struct xdr_stream *xdr = &resp->xdr; |
1fcea5b2 | 4024 | int length_offset = xdr->buf->len; |
76e5492b | 4025 | int status; |
bc749ca4 | 4026 | __be32 *p; |
1da177e4 | 4027 | |
2825a7f9 BF |
4028 | p = xdr_reserve_space(xdr, 4); |
4029 | if (!p) | |
4030 | return nfserr_resource; | |
1da177e4 | 4031 | maxcount = PAGE_SIZE; |
d0a381dd | 4032 | |
476a7b1f BF |
4033 | p = xdr_reserve_space(xdr, maxcount); |
4034 | if (!p) | |
4e21ac4b | 4035 | return nfserr_resource; |
1da177e4 | 4036 | /* |
fd4a0edf MS |
4037 | * XXX: By default, vfs_readlink() will truncate symlinks if they |
4038 | * would overflow the buffer. Is this kosher in NFSv4? If not, one | |
4039 | * easy fix is: if vfs_readlink() precisely fills the buffer, assume | |
4040 | * that truncation occurred, and return NFS4ERR_RESOURCE. | |
1da177e4 | 4041 | */ |
476a7b1f BF |
4042 | nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, |
4043 | (char *)p, &maxcount); | |
1da177e4 | 4044 | if (nfserr == nfserr_isdir) |
d3f627c8 | 4045 | nfserr = nfserr_inval; |
76e5492b CL |
4046 | if (nfserr) |
4047 | goto out_err; | |
4048 | status = svc_encode_result_payload(readlink->rl_rqstp, length_offset, | |
4049 | maxcount); | |
4050 | if (status) { | |
4051 | nfserr = nfserrno(status); | |
4052 | goto out_err; | |
d3f627c8 | 4053 | } |
1da177e4 | 4054 | |
476a7b1f BF |
4055 | wire_count = htonl(maxcount); |
4056 | write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); | |
69bbd9c7 | 4057 | xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); |
476a7b1f BF |
4058 | if (maxcount & 3) |
4059 | write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, | |
4060 | &zero, 4 - (maxcount&3)); | |
1da177e4 | 4061 | return 0; |
76e5492b CL |
4062 | |
4063 | out_err: | |
4064 | xdr_truncate_encode(xdr, length_offset); | |
4065 | return nfserr; | |
1da177e4 LT |
4066 | } |
4067 | ||
b37ad28b AV |
4068 | static __be32 |
4069 | nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) | |
1da177e4 LT |
4070 | { |
4071 | int maxcount; | |
561f0ed4 | 4072 | int bytes_left; |
1da177e4 | 4073 | loff_t offset; |
561f0ed4 | 4074 | __be64 wire_offset; |
ddd1ea56 | 4075 | struct xdr_stream *xdr = &resp->xdr; |
1fcea5b2 | 4076 | int starting_len = xdr->buf->len; |
bc749ca4 | 4077 | __be32 *p; |
1da177e4 | 4078 | |
d0a381dd BF |
4079 | p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
4080 | if (!p) | |
4081 | return nfserr_resource; | |
1da177e4 LT |
4082 | |
4083 | /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ | |
c373b0a4 BF |
4084 | *p++ = cpu_to_be32(0); |
4085 | *p++ = cpu_to_be32(0); | |
4aea24b2 BF |
4086 | resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) |
4087 | - (char *)resp->xdr.buf->head[0].iov_base; | |
1da177e4 LT |
4088 | |
4089 | /* | |
561f0ed4 BF |
4090 | * Number of bytes left for directory entries allowing for the |
4091 | * final 8 bytes of the readdir and a following failed op: | |
4092 | */ | |
4093 | bytes_left = xdr->buf->buflen - xdr->buf->len | |
4094 | - COMPOUND_ERR_SLACK_SPACE - 8; | |
4095 | if (bytes_left < 0) { | |
4096 | nfserr = nfserr_resource; | |
4097 | goto err_no_verf; | |
4098 | } | |
9c2ece6e SM |
4099 | maxcount = svc_max_payload(resp->rqstp); |
4100 | maxcount = min_t(u32, readdir->rd_maxcount, maxcount); | |
561f0ed4 BF |
4101 | /* |
4102 | * Note the rfc defines rd_maxcount as the size of the | |
4103 | * READDIR4resok structure, which includes the verifier above | |
4104 | * and the 8 bytes encoded at the end of this function: | |
1da177e4 | 4105 | */ |
561f0ed4 BF |
4106 | if (maxcount < 16) { |
4107 | nfserr = nfserr_toosmall; | |
1da177e4 LT |
4108 | goto err_no_verf; |
4109 | } | |
561f0ed4 | 4110 | maxcount = min_t(int, maxcount-16, bytes_left); |
1da177e4 | 4111 | |
aee37764 BF |
4112 | /* RFC 3530 14.2.24 allows us to ignore dircount when it's 0: */ |
4113 | if (!readdir->rd_dircount) | |
9c2ece6e | 4114 | readdir->rd_dircount = svc_max_payload(resp->rqstp); |
aee37764 | 4115 | |
561f0ed4 BF |
4116 | readdir->xdr = xdr; |
4117 | readdir->rd_maxcount = maxcount; | |
1da177e4 | 4118 | readdir->common.err = 0; |
561f0ed4 | 4119 | readdir->cookie_offset = 0; |
1da177e4 LT |
4120 | |
4121 | offset = readdir->rd_cookie; | |
4122 | nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, | |
4123 | &offset, | |
4124 | &readdir->common, nfsd4_encode_dirent); | |
4125 | if (nfserr == nfs_ok && | |
4126 | readdir->common.err == nfserr_toosmall && | |
561f0ed4 BF |
4127 | xdr->buf->len == starting_len + 8) { |
4128 | /* nothing encoded; which limit did we hit?: */ | |
4129 | if (maxcount - 16 < bytes_left) | |
4130 | /* It was the fault of rd_maxcount: */ | |
4131 | nfserr = nfserr_toosmall; | |
4132 | else | |
4133 | /* We ran out of buffer space: */ | |
4134 | nfserr = nfserr_resource; | |
4135 | } | |
1da177e4 LT |
4136 | if (nfserr) |
4137 | goto err_no_verf; | |
4138 | ||
561f0ed4 BF |
4139 | if (readdir->cookie_offset) { |
4140 | wire_offset = cpu_to_be64(offset); | |
4141 | write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, | |
4142 | &wire_offset, 8); | |
4143 | } | |
1da177e4 | 4144 | |
561f0ed4 BF |
4145 | p = xdr_reserve_space(xdr, 8); |
4146 | if (!p) { | |
4147 | WARN_ON_ONCE(1); | |
4148 | goto err_no_verf; | |
4149 | } | |
1da177e4 LT |
4150 | *p++ = 0; /* no more entries */ |
4151 | *p++ = htonl(readdir->common.err == nfserr_eof); | |
1da177e4 LT |
4152 | |
4153 | return 0; | |
4154 | err_no_verf: | |
1fcea5b2 | 4155 | xdr_truncate_encode(xdr, starting_len); |
1da177e4 LT |
4156 | return nfserr; |
4157 | } | |
4158 | ||
695e12f8 | 4159 | static __be32 |
b37ad28b | 4160 | nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) |
1da177e4 | 4161 | { |
d0a381dd | 4162 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 4163 | __be32 *p; |
1da177e4 | 4164 | |
bac966d6 BF |
4165 | p = xdr_reserve_space(xdr, 20); |
4166 | if (!p) | |
4167 | return nfserr_resource; | |
4168 | p = encode_cinfo(p, &remove->rm_cinfo); | |
4169 | return 0; | |
1da177e4 LT |
4170 | } |
4171 | ||
695e12f8 | 4172 | static __be32 |
b37ad28b | 4173 | nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) |
1da177e4 | 4174 | { |
d0a381dd | 4175 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 4176 | __be32 *p; |
1da177e4 | 4177 | |
bac966d6 BF |
4178 | p = xdr_reserve_space(xdr, 40); |
4179 | if (!p) | |
4180 | return nfserr_resource; | |
4181 | p = encode_cinfo(p, &rename->rn_sinfo); | |
4182 | p = encode_cinfo(p, &rename->rn_tinfo); | |
4183 | return 0; | |
1da177e4 LT |
4184 | } |
4185 | ||
695e12f8 | 4186 | static __be32 |
bac966d6 | 4187 | nfsd4_do_encode_secinfo(struct xdr_stream *xdr, struct svc_export *exp) |
dcb488a3 | 4188 | { |
676e4ebd | 4189 | u32 i, nflavs, supported; |
4796f457 BF |
4190 | struct exp_flavor_info *flavs; |
4191 | struct exp_flavor_info def_flavs[2]; | |
676e4ebd CL |
4192 | __be32 *p, *flavorsp; |
4193 | static bool report = true; | |
dcb488a3 | 4194 | |
4796f457 BF |
4195 | if (exp->ex_nflavors) { |
4196 | flavs = exp->ex_flavors; | |
4197 | nflavs = exp->ex_nflavors; | |
4198 | } else { /* Handling of some defaults in absence of real secinfo: */ | |
4199 | flavs = def_flavs; | |
4200 | if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { | |
4201 | nflavs = 2; | |
4202 | flavs[0].pseudoflavor = RPC_AUTH_UNIX; | |
4203 | flavs[1].pseudoflavor = RPC_AUTH_NULL; | |
4204 | } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { | |
4205 | nflavs = 1; | |
4206 | flavs[0].pseudoflavor | |
4207 | = svcauth_gss_flavor(exp->ex_client); | |
4208 | } else { | |
4209 | nflavs = 1; | |
4210 | flavs[0].pseudoflavor | |
4211 | = exp->ex_client->flavour->flavour; | |
4212 | } | |
4213 | } | |
4214 | ||
676e4ebd | 4215 | supported = 0; |
d0a381dd BF |
4216 | p = xdr_reserve_space(xdr, 4); |
4217 | if (!p) | |
bac966d6 | 4218 | return nfserr_resource; |
676e4ebd | 4219 | flavorsp = p++; /* to be backfilled later */ |
676e4ebd | 4220 | |
4796f457 | 4221 | for (i = 0; i < nflavs; i++) { |
676e4ebd | 4222 | rpc_authflavor_t pf = flavs[i].pseudoflavor; |
a77c806f | 4223 | struct rpcsec_gss_info info; |
dcb488a3 | 4224 | |
676e4ebd CL |
4225 | if (rpcauth_get_gssinfo(pf, &info) == 0) { |
4226 | supported++; | |
d0a381dd BF |
4227 | p = xdr_reserve_space(xdr, 4 + 4 + |
4228 | XDR_LEN(info.oid.len) + 4 + 4); | |
4229 | if (!p) | |
bac966d6 | 4230 | return nfserr_resource; |
c373b0a4 | 4231 | *p++ = cpu_to_be32(RPC_AUTH_GSS); |
0c0c267b | 4232 | p = xdr_encode_opaque(p, info.oid.data, info.oid.len); |
c373b0a4 BF |
4233 | *p++ = cpu_to_be32(info.qop); |
4234 | *p++ = cpu_to_be32(info.service); | |
676e4ebd CL |
4235 | } else if (pf < RPC_AUTH_MAXFLAVOR) { |
4236 | supported++; | |
d0a381dd BF |
4237 | p = xdr_reserve_space(xdr, 4); |
4238 | if (!p) | |
bac966d6 | 4239 | return nfserr_resource; |
c373b0a4 | 4240 | *p++ = cpu_to_be32(pf); |
676e4ebd CL |
4241 | } else { |
4242 | if (report) | |
4243 | pr_warn("NFS: SECINFO: security flavor %u " | |
4244 | "is not supported\n", pf); | |
dcb488a3 AA |
4245 | } |
4246 | } | |
a77c806f | 4247 | |
676e4ebd CL |
4248 | if (nflavs != supported) |
4249 | report = false; | |
4250 | *flavorsp = htonl(supported); | |
bac966d6 | 4251 | return 0; |
dcb488a3 AA |
4252 | } |
4253 | ||
22b6dee8 MJ |
4254 | static __be32 |
4255 | nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4256 | struct nfsd4_secinfo *secinfo) | |
4257 | { | |
d0a381dd BF |
4258 | struct xdr_stream *xdr = &resp->xdr; |
4259 | ||
bac966d6 | 4260 | return nfsd4_do_encode_secinfo(xdr, secinfo->si_exp); |
22b6dee8 MJ |
4261 | } |
4262 | ||
4263 | static __be32 | |
4264 | nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4265 | struct nfsd4_secinfo_no_name *secinfo) | |
4266 | { | |
d0a381dd BF |
4267 | struct xdr_stream *xdr = &resp->xdr; |
4268 | ||
bac966d6 | 4269 | return nfsd4_do_encode_secinfo(xdr, secinfo->sin_exp); |
22b6dee8 MJ |
4270 | } |
4271 | ||
1da177e4 LT |
4272 | /* |
4273 | * The SETATTR encode routine is special -- it always encodes a bitmap, | |
4274 | * regardless of the error status. | |
4275 | */ | |
695e12f8 | 4276 | static __be32 |
b37ad28b | 4277 | nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) |
1da177e4 | 4278 | { |
d0a381dd | 4279 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 4280 | __be32 *p; |
1da177e4 | 4281 | |
d0a381dd BF |
4282 | p = xdr_reserve_space(xdr, 16); |
4283 | if (!p) | |
4284 | return nfserr_resource; | |
1da177e4 | 4285 | if (nfserr) { |
c373b0a4 BF |
4286 | *p++ = cpu_to_be32(3); |
4287 | *p++ = cpu_to_be32(0); | |
4288 | *p++ = cpu_to_be32(0); | |
4289 | *p++ = cpu_to_be32(0); | |
1da177e4 LT |
4290 | } |
4291 | else { | |
c373b0a4 BF |
4292 | *p++ = cpu_to_be32(3); |
4293 | *p++ = cpu_to_be32(setattr->sa_bmval[0]); | |
4294 | *p++ = cpu_to_be32(setattr->sa_bmval[1]); | |
4295 | *p++ = cpu_to_be32(setattr->sa_bmval[2]); | |
1da177e4 | 4296 | } |
695e12f8 | 4297 | return nfserr; |
1da177e4 LT |
4298 | } |
4299 | ||
695e12f8 | 4300 | static __be32 |
b37ad28b | 4301 | nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) |
1da177e4 | 4302 | { |
d0a381dd | 4303 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 4304 | __be32 *p; |
1da177e4 LT |
4305 | |
4306 | if (!nfserr) { | |
d0a381dd BF |
4307 | p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); |
4308 | if (!p) | |
4309 | return nfserr_resource; | |
0c0c267b BF |
4310 | p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); |
4311 | p = xdr_encode_opaque_fixed(p, &scd->se_confirm, | |
4312 | NFS4_VERIFIER_SIZE); | |
1da177e4 LT |
4313 | } |
4314 | else if (nfserr == nfserr_clid_inuse) { | |
d0a381dd BF |
4315 | p = xdr_reserve_space(xdr, 8); |
4316 | if (!p) | |
4317 | return nfserr_resource; | |
c373b0a4 BF |
4318 | *p++ = cpu_to_be32(0); |
4319 | *p++ = cpu_to_be32(0); | |
1da177e4 | 4320 | } |
695e12f8 | 4321 | return nfserr; |
1da177e4 LT |
4322 | } |
4323 | ||
695e12f8 | 4324 | static __be32 |
b37ad28b | 4325 | nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) |
1da177e4 | 4326 | { |
d0a381dd | 4327 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 4328 | __be32 *p; |
1da177e4 | 4329 | |
bac966d6 BF |
4330 | p = xdr_reserve_space(xdr, 16); |
4331 | if (!p) | |
4332 | return nfserr_resource; | |
4333 | *p++ = cpu_to_be32(write->wr_bytes_written); | |
4334 | *p++ = cpu_to_be32(write->wr_how_written); | |
4335 | p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, | |
4336 | NFS4_VERIFIER_SIZE); | |
4337 | return 0; | |
1da177e4 LT |
4338 | } |
4339 | ||
2db134eb | 4340 | static __be32 |
57b7b43b | 4341 | nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, |
2db134eb AA |
4342 | struct nfsd4_exchange_id *exid) |
4343 | { | |
d0a381dd | 4344 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 4345 | __be32 *p; |
0733d213 AA |
4346 | char *major_id; |
4347 | char *server_scope; | |
4348 | int major_id_sz; | |
4349 | int server_scope_sz; | |
4350 | uint64_t minor_id = 0; | |
7627d7dc | 4351 | struct nfsd_net *nn = net_generic(SVC_NET(resp->rqstp), nfsd_net_id); |
0733d213 | 4352 | |
7627d7dc SM |
4353 | major_id = nn->nfsd_name; |
4354 | major_id_sz = strlen(nn->nfsd_name); | |
4355 | server_scope = nn->nfsd_name; | |
4356 | server_scope_sz = strlen(nn->nfsd_name); | |
0733d213 | 4357 | |
d0a381dd | 4358 | p = xdr_reserve_space(xdr, |
0733d213 AA |
4359 | 8 /* eir_clientid */ + |
4360 | 4 /* eir_sequenceid */ + | |
4361 | 4 /* eir_flags */ + | |
a8bb84bc | 4362 | 4 /* spr_how */); |
d0a381dd BF |
4363 | if (!p) |
4364 | return nfserr_resource; | |
0733d213 | 4365 | |
0c0c267b | 4366 | p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); |
c373b0a4 BF |
4367 | *p++ = cpu_to_be32(exid->seqid); |
4368 | *p++ = cpu_to_be32(exid->flags); | |
0733d213 | 4369 | |
c373b0a4 | 4370 | *p++ = cpu_to_be32(exid->spa_how); |
a8bb84bc | 4371 | |
57266a6e BF |
4372 | switch (exid->spa_how) { |
4373 | case SP4_NONE: | |
4374 | break; | |
4375 | case SP4_MACH_CRED: | |
4376 | /* spo_must_enforce bitmap: */ | |
bac966d6 | 4377 | nfserr = nfsd4_encode_bitmap(xdr, |
ed941643 AE |
4378 | exid->spo_must_enforce[0], |
4379 | exid->spo_must_enforce[1], | |
4380 | exid->spo_must_enforce[2]); | |
bac966d6 BF |
4381 | if (nfserr) |
4382 | return nfserr; | |
ed941643 | 4383 | /* spo_must_allow bitmap: */ |
bac966d6 | 4384 | nfserr = nfsd4_encode_bitmap(xdr, |
ed941643 AE |
4385 | exid->spo_must_allow[0], |
4386 | exid->spo_must_allow[1], | |
4387 | exid->spo_must_allow[2]); | |
bac966d6 BF |
4388 | if (nfserr) |
4389 | return nfserr; | |
57266a6e BF |
4390 | break; |
4391 | default: | |
4392 | WARN_ON_ONCE(1); | |
4393 | } | |
0733d213 | 4394 | |
d0a381dd | 4395 | p = xdr_reserve_space(xdr, |
a8bb84bc KM |
4396 | 8 /* so_minor_id */ + |
4397 | 4 /* so_major_id.len */ + | |
4398 | (XDR_QUADLEN(major_id_sz) * 4) + | |
4399 | 4 /* eir_server_scope.len */ + | |
4400 | (XDR_QUADLEN(server_scope_sz) * 4) + | |
4401 | 4 /* eir_server_impl_id.count (0) */); | |
d0a381dd BF |
4402 | if (!p) |
4403 | return nfserr_resource; | |
a8bb84bc | 4404 | |
0733d213 | 4405 | /* The server_owner struct */ |
b64c7f3b | 4406 | p = xdr_encode_hyper(p, minor_id); /* Minor id */ |
0733d213 | 4407 | /* major id */ |
0c0c267b | 4408 | p = xdr_encode_opaque(p, major_id, major_id_sz); |
0733d213 AA |
4409 | |
4410 | /* Server scope */ | |
0c0c267b | 4411 | p = xdr_encode_opaque(p, server_scope, server_scope_sz); |
0733d213 AA |
4412 | |
4413 | /* Implementation id */ | |
c373b0a4 | 4414 | *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ |
0733d213 | 4415 | return 0; |
2db134eb AA |
4416 | } |
4417 | ||
4418 | static __be32 | |
57b7b43b | 4419 | nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, |
2db134eb AA |
4420 | struct nfsd4_create_session *sess) |
4421 | { | |
d0a381dd | 4422 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 4423 | __be32 *p; |
ec6b5d7b | 4424 | |
d0a381dd BF |
4425 | p = xdr_reserve_space(xdr, 24); |
4426 | if (!p) | |
4427 | return nfserr_resource; | |
0c0c267b BF |
4428 | p = xdr_encode_opaque_fixed(p, sess->sessionid.data, |
4429 | NFS4_MAX_SESSIONID_LEN); | |
c373b0a4 BF |
4430 | *p++ = cpu_to_be32(sess->seqid); |
4431 | *p++ = cpu_to_be32(sess->flags); | |
ec6b5d7b | 4432 | |
d0a381dd BF |
4433 | p = xdr_reserve_space(xdr, 28); |
4434 | if (!p) | |
4435 | return nfserr_resource; | |
c373b0a4 BF |
4436 | *p++ = cpu_to_be32(0); /* headerpadsz */ |
4437 | *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); | |
4438 | *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); | |
4439 | *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); | |
4440 | *p++ = cpu_to_be32(sess->fore_channel.maxops); | |
4441 | *p++ = cpu_to_be32(sess->fore_channel.maxreqs); | |
4442 | *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); | |
ec6b5d7b AA |
4443 | |
4444 | if (sess->fore_channel.nr_rdma_attrs) { | |
d0a381dd BF |
4445 | p = xdr_reserve_space(xdr, 4); |
4446 | if (!p) | |
4447 | return nfserr_resource; | |
c373b0a4 | 4448 | *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); |
ec6b5d7b AA |
4449 | } |
4450 | ||
d0a381dd BF |
4451 | p = xdr_reserve_space(xdr, 28); |
4452 | if (!p) | |
4453 | return nfserr_resource; | |
c373b0a4 BF |
4454 | *p++ = cpu_to_be32(0); /* headerpadsz */ |
4455 | *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); | |
4456 | *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); | |
4457 | *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); | |
4458 | *p++ = cpu_to_be32(sess->back_channel.maxops); | |
4459 | *p++ = cpu_to_be32(sess->back_channel.maxreqs); | |
4460 | *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); | |
ec6b5d7b AA |
4461 | |
4462 | if (sess->back_channel.nr_rdma_attrs) { | |
d0a381dd BF |
4463 | p = xdr_reserve_space(xdr, 4); |
4464 | if (!p) | |
4465 | return nfserr_resource; | |
c373b0a4 | 4466 | *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); |
ec6b5d7b AA |
4467 | } |
4468 | return 0; | |
2db134eb AA |
4469 | } |
4470 | ||
c47d832b | 4471 | static __be32 |
57b7b43b | 4472 | nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, |
2db134eb AA |
4473 | struct nfsd4_sequence *seq) |
4474 | { | |
d0a381dd | 4475 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 4476 | __be32 *p; |
b85d4c01 | 4477 | |
d0a381dd BF |
4478 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); |
4479 | if (!p) | |
4480 | return nfserr_resource; | |
0c0c267b BF |
4481 | p = xdr_encode_opaque_fixed(p, seq->sessionid.data, |
4482 | NFS4_MAX_SESSIONID_LEN); | |
c373b0a4 BF |
4483 | *p++ = cpu_to_be32(seq->seqid); |
4484 | *p++ = cpu_to_be32(seq->slotid); | |
b7d7ca35 | 4485 | /* Note slotid's are numbered from zero: */ |
c373b0a4 BF |
4486 | *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ |
4487 | *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ | |
4488 | *p++ = cpu_to_be32(seq->status_flags); | |
b85d4c01 | 4489 | |
f5236013 | 4490 | resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ |
b85d4c01 | 4491 | return 0; |
2db134eb AA |
4492 | } |
4493 | ||
2355c596 | 4494 | static __be32 |
57b7b43b | 4495 | nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, |
17456804 BS |
4496 | struct nfsd4_test_stateid *test_stateid) |
4497 | { | |
d0a381dd | 4498 | struct xdr_stream *xdr = &resp->xdr; |
03cfb420 | 4499 | struct nfsd4_test_stateid_id *stateid, *next; |
17456804 | 4500 | __be32 *p; |
17456804 | 4501 | |
d0a381dd BF |
4502 | p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); |
4503 | if (!p) | |
4504 | return nfserr_resource; | |
17456804 | 4505 | *p++ = htonl(test_stateid->ts_num_ids); |
17456804 | 4506 | |
03cfb420 | 4507 | list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { |
02f5fde5 | 4508 | *p++ = stateid->ts_id_status; |
17456804 | 4509 | } |
17456804 | 4510 | |
bac966d6 | 4511 | return 0; |
17456804 BS |
4512 | } |
4513 | ||
9cf514cc CH |
4514 | #ifdef CONFIG_NFSD_PNFS |
4515 | static __be32 | |
4516 | nfsd4_encode_getdeviceinfo(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4517 | struct nfsd4_getdeviceinfo *gdev) | |
4518 | { | |
4519 | struct xdr_stream *xdr = &resp->xdr; | |
f961e3f2 | 4520 | const struct nfsd4_layout_ops *ops; |
9cf514cc CH |
4521 | u32 starting_len = xdr->buf->len, needed_len; |
4522 | __be32 *p; | |
4523 | ||
9cf514cc CH |
4524 | p = xdr_reserve_space(xdr, 4); |
4525 | if (!p) | |
bac966d6 | 4526 | return nfserr_resource; |
9cf514cc CH |
4527 | |
4528 | *p++ = cpu_to_be32(gdev->gd_layout_type); | |
4529 | ||
4530 | /* If maxcount is 0 then just update notifications */ | |
4531 | if (gdev->gd_maxcount != 0) { | |
f961e3f2 | 4532 | ops = nfsd4_layout_ops[gdev->gd_layout_type]; |
9cf514cc CH |
4533 | nfserr = ops->encode_getdeviceinfo(xdr, gdev); |
4534 | if (nfserr) { | |
4535 | /* | |
4536 | * We don't bother to burden the layout drivers with | |
4537 | * enforcing gd_maxcount, just tell the client to | |
4538 | * come back with a bigger buffer if it's not enough. | |
4539 | */ | |
4540 | if (xdr->buf->len + 4 > gdev->gd_maxcount) | |
4541 | goto toosmall; | |
bac966d6 | 4542 | return nfserr; |
9cf514cc CH |
4543 | } |
4544 | } | |
4545 | ||
9cf514cc CH |
4546 | if (gdev->gd_notify_types) { |
4547 | p = xdr_reserve_space(xdr, 4 + 4); | |
4548 | if (!p) | |
bac966d6 | 4549 | return nfserr_resource; |
9cf514cc CH |
4550 | *p++ = cpu_to_be32(1); /* bitmap length */ |
4551 | *p++ = cpu_to_be32(gdev->gd_notify_types); | |
4552 | } else { | |
4553 | p = xdr_reserve_space(xdr, 4); | |
4554 | if (!p) | |
bac966d6 | 4555 | return nfserr_resource; |
9cf514cc CH |
4556 | *p++ = 0; |
4557 | } | |
4558 | ||
bac966d6 | 4559 | return 0; |
9cf514cc CH |
4560 | toosmall: |
4561 | dprintk("%s: maxcount too small\n", __func__); | |
4562 | needed_len = xdr->buf->len + 4 /* notifications */; | |
4563 | xdr_truncate_encode(xdr, starting_len); | |
4564 | p = xdr_reserve_space(xdr, 4); | |
bac966d6 BF |
4565 | if (!p) |
4566 | return nfserr_resource; | |
4567 | *p++ = cpu_to_be32(needed_len); | |
4568 | return nfserr_toosmall; | |
9cf514cc CH |
4569 | } |
4570 | ||
4571 | static __be32 | |
4572 | nfsd4_encode_layoutget(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4573 | struct nfsd4_layoutget *lgp) | |
4574 | { | |
4575 | struct xdr_stream *xdr = &resp->xdr; | |
f961e3f2 | 4576 | const struct nfsd4_layout_ops *ops; |
9cf514cc CH |
4577 | __be32 *p; |
4578 | ||
9cf514cc CH |
4579 | p = xdr_reserve_space(xdr, 36 + sizeof(stateid_opaque_t)); |
4580 | if (!p) | |
bac966d6 | 4581 | return nfserr_resource; |
9cf514cc CH |
4582 | |
4583 | *p++ = cpu_to_be32(1); /* we always set return-on-close */ | |
4584 | *p++ = cpu_to_be32(lgp->lg_sid.si_generation); | |
4585 | p = xdr_encode_opaque_fixed(p, &lgp->lg_sid.si_opaque, | |
4586 | sizeof(stateid_opaque_t)); | |
4587 | ||
4588 | *p++ = cpu_to_be32(1); /* we always return a single layout */ | |
4589 | p = xdr_encode_hyper(p, lgp->lg_seg.offset); | |
4590 | p = xdr_encode_hyper(p, lgp->lg_seg.length); | |
4591 | *p++ = cpu_to_be32(lgp->lg_seg.iomode); | |
4592 | *p++ = cpu_to_be32(lgp->lg_layout_type); | |
4593 | ||
f961e3f2 | 4594 | ops = nfsd4_layout_ops[lgp->lg_layout_type]; |
bac966d6 | 4595 | return ops->encode_layoutget(xdr, lgp); |
9cf514cc CH |
4596 | } |
4597 | ||
4598 | static __be32 | |
4599 | nfsd4_encode_layoutcommit(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4600 | struct nfsd4_layoutcommit *lcp) | |
4601 | { | |
4602 | struct xdr_stream *xdr = &resp->xdr; | |
4603 | __be32 *p; | |
4604 | ||
9cf514cc CH |
4605 | p = xdr_reserve_space(xdr, 4); |
4606 | if (!p) | |
4607 | return nfserr_resource; | |
4608 | *p++ = cpu_to_be32(lcp->lc_size_chg); | |
4609 | if (lcp->lc_size_chg) { | |
4610 | p = xdr_reserve_space(xdr, 8); | |
4611 | if (!p) | |
4612 | return nfserr_resource; | |
4613 | p = xdr_encode_hyper(p, lcp->lc_newsize); | |
4614 | } | |
4615 | ||
bac966d6 | 4616 | return 0; |
9cf514cc CH |
4617 | } |
4618 | ||
4619 | static __be32 | |
4620 | nfsd4_encode_layoutreturn(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4621 | struct nfsd4_layoutreturn *lrp) | |
4622 | { | |
4623 | struct xdr_stream *xdr = &resp->xdr; | |
4624 | __be32 *p; | |
4625 | ||
9cf514cc CH |
4626 | p = xdr_reserve_space(xdr, 4); |
4627 | if (!p) | |
4628 | return nfserr_resource; | |
4629 | *p++ = cpu_to_be32(lrp->lrs_present); | |
4630 | if (lrp->lrs_present) | |
376675da | 4631 | return nfsd4_encode_stateid(xdr, &lrp->lr_sid); |
bac966d6 | 4632 | return 0; |
9cf514cc CH |
4633 | } |
4634 | #endif /* CONFIG_NFSD_PNFS */ | |
4635 | ||
29ae7f9d | 4636 | static __be32 |
e0639dc5 OK |
4637 | nfsd42_encode_write_res(struct nfsd4_compoundres *resp, |
4638 | struct nfsd42_write_res *write, bool sync) | |
29ae7f9d AS |
4639 | { |
4640 | __be32 *p; | |
e0639dc5 OK |
4641 | p = xdr_reserve_space(&resp->xdr, 4); |
4642 | if (!p) | |
4643 | return nfserr_resource; | |
29ae7f9d | 4644 | |
e0639dc5 OK |
4645 | if (sync) |
4646 | *p++ = cpu_to_be32(0); | |
4647 | else { | |
4648 | __be32 nfserr; | |
4649 | *p++ = cpu_to_be32(1); | |
4650 | nfserr = nfsd4_encode_stateid(&resp->xdr, &write->cb_stateid); | |
4651 | if (nfserr) | |
4652 | return nfserr; | |
4653 | } | |
4654 | p = xdr_reserve_space(&resp->xdr, 8 + 4 + NFS4_VERIFIER_SIZE); | |
29ae7f9d AS |
4655 | if (!p) |
4656 | return nfserr_resource; | |
4657 | ||
29ae7f9d AS |
4658 | p = xdr_encode_hyper(p, write->wr_bytes_written); |
4659 | *p++ = cpu_to_be32(write->wr_stable_how); | |
4660 | p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, | |
4661 | NFS4_VERIFIER_SIZE); | |
4662 | return nfs_ok; | |
4663 | } | |
4664 | ||
51911868 OK |
4665 | static __be32 |
4666 | nfsd42_encode_nl4_server(struct nfsd4_compoundres *resp, struct nl4_server *ns) | |
4667 | { | |
4668 | struct xdr_stream *xdr = &resp->xdr; | |
4669 | struct nfs42_netaddr *addr; | |
4670 | __be32 *p; | |
4671 | ||
4672 | p = xdr_reserve_space(xdr, 4); | |
4673 | *p++ = cpu_to_be32(ns->nl4_type); | |
4674 | ||
4675 | switch (ns->nl4_type) { | |
4676 | case NL4_NETADDR: | |
4677 | addr = &ns->u.nl4_addr; | |
4678 | ||
4679 | /* netid_len, netid, uaddr_len, uaddr (port included | |
4680 | * in RPCBIND_MAXUADDRLEN) | |
4681 | */ | |
4682 | p = xdr_reserve_space(xdr, | |
4683 | 4 /* netid len */ + | |
4684 | (XDR_QUADLEN(addr->netid_len) * 4) + | |
4685 | 4 /* uaddr len */ + | |
4686 | (XDR_QUADLEN(addr->addr_len) * 4)); | |
4687 | if (!p) | |
4688 | return nfserr_resource; | |
4689 | ||
4690 | *p++ = cpu_to_be32(addr->netid_len); | |
4691 | p = xdr_encode_opaque_fixed(p, addr->netid, | |
4692 | addr->netid_len); | |
4693 | *p++ = cpu_to_be32(addr->addr_len); | |
4694 | p = xdr_encode_opaque_fixed(p, addr->addr, | |
4695 | addr->addr_len); | |
4696 | break; | |
4697 | default: | |
4698 | WARN_ON_ONCE(ns->nl4_type != NL4_NETADDR); | |
4699 | return nfserr_inval; | |
4700 | } | |
4701 | ||
4702 | return 0; | |
4703 | } | |
4704 | ||
29ae7f9d AS |
4705 | static __be32 |
4706 | nfsd4_encode_copy(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4707 | struct nfsd4_copy *copy) | |
4708 | { | |
4709 | __be32 *p; | |
4710 | ||
e0639dc5 | 4711 | nfserr = nfsd42_encode_write_res(resp, ©->cp_res, |
e8febea7 | 4712 | !!copy->cp_synchronous); |
bac966d6 BF |
4713 | if (nfserr) |
4714 | return nfserr; | |
29ae7f9d | 4715 | |
bac966d6 | 4716 | p = xdr_reserve_space(&resp->xdr, 4 + 4); |
edcc8452 | 4717 | *p++ = xdr_one; /* cr_consecutive */ |
bac966d6 BF |
4718 | *p++ = cpu_to_be32(copy->cp_synchronous); |
4719 | return 0; | |
29ae7f9d AS |
4720 | } |
4721 | ||
6308bc98 OK |
4722 | static __be32 |
4723 | nfsd4_encode_offload_status(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4724 | struct nfsd4_offload_status *os) | |
4725 | { | |
4726 | struct xdr_stream *xdr = &resp->xdr; | |
4727 | __be32 *p; | |
4728 | ||
4729 | p = xdr_reserve_space(xdr, 8 + 4); | |
4730 | if (!p) | |
4731 | return nfserr_resource; | |
4732 | p = xdr_encode_hyper(p, os->count); | |
4733 | *p++ = cpu_to_be32(0); | |
528b8493 AS |
4734 | return nfserr; |
4735 | } | |
4736 | ||
4737 | static __be32 | |
4738 | nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp, | |
4739 | struct nfsd4_read *read, | |
9f0b5792 AS |
4740 | unsigned long *maxcount, u32 *eof, |
4741 | loff_t *pos) | |
528b8493 AS |
4742 | { |
4743 | struct xdr_stream *xdr = &resp->xdr; | |
4744 | struct file *file = read->rd_nf->nf_file; | |
4745 | int starting_len = xdr->buf->len; | |
9f0b5792 | 4746 | loff_t hole_pos; |
528b8493 AS |
4747 | __be32 nfserr; |
4748 | __be32 *p, tmp; | |
4749 | __be64 tmp64; | |
4750 | ||
9f0b5792 | 4751 | hole_pos = pos ? *pos : vfs_llseek(file, read->rd_offset, SEEK_HOLE); |
2db27992 | 4752 | if (hole_pos > read->rd_offset) |
278765ea AS |
4753 | *maxcount = min_t(unsigned long, *maxcount, hole_pos - read->rd_offset); |
4754 | *maxcount = min_t(unsigned long, *maxcount, (xdr->buf->buflen - xdr->buf->len)); | |
528b8493 AS |
4755 | |
4756 | /* Content type, offset, byte count */ | |
4757 | p = xdr_reserve_space(xdr, 4 + 8 + 4); | |
4758 | if (!p) | |
4759 | return nfserr_resource; | |
4760 | ||
278765ea | 4761 | read->rd_vlen = xdr_reserve_space_vec(xdr, resp->rqstp->rq_vec, *maxcount); |
528b8493 AS |
4762 | if (read->rd_vlen < 0) |
4763 | return nfserr_resource; | |
4764 | ||
4765 | nfserr = nfsd_readv(resp->rqstp, read->rd_fhp, file, read->rd_offset, | |
278765ea | 4766 | resp->rqstp->rq_vec, read->rd_vlen, maxcount, eof); |
528b8493 AS |
4767 | if (nfserr) |
4768 | return nfserr; | |
72d78717 | 4769 | xdr_truncate_encode(xdr, starting_len + 16 + xdr_align_size(*maxcount)); |
528b8493 AS |
4770 | |
4771 | tmp = htonl(NFS4_CONTENT_DATA); | |
4772 | write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4); | |
4773 | tmp64 = cpu_to_be64(read->rd_offset); | |
4774 | write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp64, 8); | |
278765ea | 4775 | tmp = htonl(*maxcount); |
528b8493 | 4776 | write_bytes_to_xdr_buf(xdr->buf, starting_len + 12, &tmp, 4); |
72d78717 TM |
4777 | |
4778 | tmp = xdr_zero; | |
4779 | write_bytes_to_xdr_buf(xdr->buf, starting_len + 16 + *maxcount, &tmp, | |
4780 | xdr_pad_size(*maxcount)); | |
528b8493 AS |
4781 | return nfs_ok; |
4782 | } | |
4783 | ||
2db27992 AS |
4784 | static __be32 |
4785 | nfsd4_encode_read_plus_hole(struct nfsd4_compoundres *resp, | |
4786 | struct nfsd4_read *read, | |
278765ea | 4787 | unsigned long *maxcount, u32 *eof) |
2db27992 AS |
4788 | { |
4789 | struct file *file = read->rd_nf->nf_file; | |
278765ea | 4790 | loff_t data_pos = vfs_llseek(file, read->rd_offset, SEEK_DATA); |
9f0b5792 | 4791 | loff_t f_size = i_size_read(file_inode(file)); |
278765ea | 4792 | unsigned long count; |
2db27992 AS |
4793 | __be32 *p; |
4794 | ||
278765ea | 4795 | if (data_pos == -ENXIO) |
9f0b5792 AS |
4796 | data_pos = f_size; |
4797 | else if (data_pos <= read->rd_offset || (data_pos < f_size && data_pos % PAGE_SIZE)) | |
4798 | return nfsd4_encode_read_plus_data(resp, read, maxcount, eof, &f_size); | |
278765ea AS |
4799 | count = data_pos - read->rd_offset; |
4800 | ||
2db27992 AS |
4801 | /* Content type, offset, byte count */ |
4802 | p = xdr_reserve_space(&resp->xdr, 4 + 8 + 8); | |
4803 | if (!p) | |
4804 | return nfserr_resource; | |
4805 | ||
4806 | *p++ = htonl(NFS4_CONTENT_HOLE); | |
4807 | p = xdr_encode_hyper(p, read->rd_offset); | |
278765ea | 4808 | p = xdr_encode_hyper(p, count); |
2db27992 | 4809 | |
9f0b5792 | 4810 | *eof = (read->rd_offset + count) >= f_size; |
278765ea | 4811 | *maxcount = min_t(unsigned long, count, *maxcount); |
2db27992 AS |
4812 | return nfs_ok; |
4813 | } | |
4814 | ||
528b8493 AS |
4815 | static __be32 |
4816 | nfsd4_encode_read_plus(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4817 | struct nfsd4_read *read) | |
4818 | { | |
278765ea | 4819 | unsigned long maxcount, count; |
528b8493 AS |
4820 | struct xdr_stream *xdr = &resp->xdr; |
4821 | struct file *file; | |
4822 | int starting_len = xdr->buf->len; | |
9f0b5792 | 4823 | int last_segment = xdr->buf->len; |
528b8493 AS |
4824 | int segments = 0; |
4825 | __be32 *p, tmp; | |
9f0b5792 | 4826 | bool is_data; |
2db27992 | 4827 | loff_t pos; |
528b8493 AS |
4828 | u32 eof; |
4829 | ||
4830 | if (nfserr) | |
4831 | return nfserr; | |
4832 | file = read->rd_nf->nf_file; | |
4833 | ||
4834 | /* eof flag, segment count */ | |
4835 | p = xdr_reserve_space(xdr, 4 + 4); | |
4836 | if (!p) | |
4837 | return nfserr_resource; | |
4838 | xdr_commit_encode(xdr); | |
4839 | ||
4840 | maxcount = svc_max_payload(resp->rqstp); | |
4841 | maxcount = min_t(unsigned long, maxcount, | |
4842 | (xdr->buf->buflen - xdr->buf->len)); | |
4843 | maxcount = min_t(unsigned long, maxcount, read->rd_length); | |
278765ea | 4844 | count = maxcount; |
528b8493 AS |
4845 | |
4846 | eof = read->rd_offset >= i_size_read(file_inode(file)); | |
2db27992 AS |
4847 | if (eof) |
4848 | goto out; | |
4849 | ||
9f0b5792 AS |
4850 | pos = vfs_llseek(file, read->rd_offset, SEEK_HOLE); |
4851 | is_data = pos > read->rd_offset; | |
2db27992 | 4852 | |
9f0b5792 | 4853 | while (count > 0 && !eof) { |
278765ea | 4854 | maxcount = count; |
9f0b5792 AS |
4855 | if (is_data) |
4856 | nfserr = nfsd4_encode_read_plus_data(resp, read, &maxcount, &eof, | |
4857 | segments == 0 ? &pos : NULL); | |
4858 | else | |
4859 | nfserr = nfsd4_encode_read_plus_hole(resp, read, &maxcount, &eof); | |
278765ea AS |
4860 | if (nfserr) |
4861 | goto out; | |
4862 | count -= maxcount; | |
4863 | read->rd_offset += maxcount; | |
9f0b5792 AS |
4864 | is_data = !is_data; |
4865 | last_segment = xdr->buf->len; | |
528b8493 AS |
4866 | segments++; |
4867 | } | |
4868 | ||
2db27992 | 4869 | out: |
278765ea | 4870 | if (nfserr && segments == 0) |
528b8493 AS |
4871 | xdr_truncate_encode(xdr, starting_len); |
4872 | else { | |
9f0b5792 AS |
4873 | if (nfserr) { |
4874 | xdr_truncate_encode(xdr, last_segment); | |
4875 | nfserr = nfs_ok; | |
b68f0cbd | 4876 | eof = 0; |
9f0b5792 | 4877 | } |
b68f0cbd TM |
4878 | tmp = htonl(eof); |
4879 | write_bytes_to_xdr_buf(xdr->buf, starting_len, &tmp, 4); | |
4880 | tmp = htonl(segments); | |
4881 | write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); | |
528b8493 | 4882 | } |
6308bc98 OK |
4883 | |
4884 | return nfserr; | |
4885 | } | |
4886 | ||
51911868 OK |
4887 | static __be32 |
4888 | nfsd4_encode_copy_notify(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4889 | struct nfsd4_copy_notify *cn) | |
4890 | { | |
4891 | struct xdr_stream *xdr = &resp->xdr; | |
4892 | __be32 *p; | |
4893 | ||
4894 | if (nfserr) | |
4895 | return nfserr; | |
4896 | ||
4897 | /* 8 sec, 4 nsec */ | |
4898 | p = xdr_reserve_space(xdr, 12); | |
4899 | if (!p) | |
4900 | return nfserr_resource; | |
4901 | ||
4902 | /* cnr_lease_time */ | |
4903 | p = xdr_encode_hyper(p, cn->cpn_sec); | |
4904 | *p++ = cpu_to_be32(cn->cpn_nsec); | |
4905 | ||
4906 | /* cnr_stateid */ | |
4907 | nfserr = nfsd4_encode_stateid(xdr, &cn->cpn_cnr_stateid); | |
4908 | if (nfserr) | |
4909 | return nfserr; | |
4910 | ||
4911 | /* cnr_src.nl_nsvr */ | |
4912 | p = xdr_reserve_space(xdr, 4); | |
4913 | if (!p) | |
4914 | return nfserr_resource; | |
4915 | ||
4916 | *p++ = cpu_to_be32(1); | |
4917 | ||
4918 | return nfsd42_encode_nl4_server(resp, &cn->cpn_src); | |
4919 | } | |
4920 | ||
24bab491 AS |
4921 | static __be32 |
4922 | nfsd4_encode_seek(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4923 | struct nfsd4_seek *seek) | |
4924 | { | |
4925 | __be32 *p; | |
4926 | ||
24bab491 AS |
4927 | p = xdr_reserve_space(&resp->xdr, 4 + 8); |
4928 | *p++ = cpu_to_be32(seek->seek_eof); | |
4929 | p = xdr_encode_hyper(p, seek->seek_pos); | |
4930 | ||
bac966d6 | 4931 | return 0; |
24bab491 AS |
4932 | } |
4933 | ||
695e12f8 BH |
4934 | static __be32 |
4935 | nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) | |
4936 | { | |
4937 | return nfserr; | |
4938 | } | |
4939 | ||
23e50fe3 FL |
4940 | /* |
4941 | * Encode kmalloc-ed buffer in to XDR stream. | |
4942 | */ | |
b9a49237 | 4943 | static __be32 |
23e50fe3 FL |
4944 | nfsd4_vbuf_to_stream(struct xdr_stream *xdr, char *buf, u32 buflen) |
4945 | { | |
4946 | u32 cplen; | |
4947 | __be32 *p; | |
4948 | ||
4949 | cplen = min_t(unsigned long, buflen, | |
4950 | ((void *)xdr->end - (void *)xdr->p)); | |
4951 | p = xdr_reserve_space(xdr, cplen); | |
4952 | if (!p) | |
4953 | return nfserr_resource; | |
4954 | ||
4955 | memcpy(p, buf, cplen); | |
4956 | buf += cplen; | |
4957 | buflen -= cplen; | |
4958 | ||
4959 | while (buflen) { | |
4960 | cplen = min_t(u32, buflen, PAGE_SIZE); | |
4961 | p = xdr_reserve_space(xdr, cplen); | |
4962 | if (!p) | |
4963 | return nfserr_resource; | |
4964 | ||
4965 | memcpy(p, buf, cplen); | |
4966 | ||
4967 | if (cplen < PAGE_SIZE) { | |
4968 | /* | |
4969 | * We're done, with a length that wasn't page | |
4970 | * aligned, so possibly not word aligned. Pad | |
4971 | * any trailing bytes with 0. | |
4972 | */ | |
4973 | xdr_encode_opaque_fixed(p, NULL, cplen); | |
4974 | break; | |
4975 | } | |
4976 | ||
4977 | buflen -= PAGE_SIZE; | |
4978 | buf += PAGE_SIZE; | |
4979 | } | |
4980 | ||
4981 | return 0; | |
4982 | } | |
4983 | ||
4984 | static __be32 | |
4985 | nfsd4_encode_getxattr(struct nfsd4_compoundres *resp, __be32 nfserr, | |
4986 | struct nfsd4_getxattr *getxattr) | |
4987 | { | |
4988 | struct xdr_stream *xdr = &resp->xdr; | |
4989 | __be32 *p, err; | |
4990 | ||
4991 | p = xdr_reserve_space(xdr, 4); | |
4992 | if (!p) | |
4993 | return nfserr_resource; | |
4994 | ||
4995 | *p = cpu_to_be32(getxattr->getxa_len); | |
4996 | ||
4997 | if (getxattr->getxa_len == 0) | |
4998 | return 0; | |
4999 | ||
5000 | err = nfsd4_vbuf_to_stream(xdr, getxattr->getxa_buf, | |
5001 | getxattr->getxa_len); | |
5002 | ||
5003 | kvfree(getxattr->getxa_buf); | |
5004 | ||
5005 | return err; | |
5006 | } | |
5007 | ||
5008 | static __be32 | |
5009 | nfsd4_encode_setxattr(struct nfsd4_compoundres *resp, __be32 nfserr, | |
5010 | struct nfsd4_setxattr *setxattr) | |
5011 | { | |
5012 | struct xdr_stream *xdr = &resp->xdr; | |
5013 | __be32 *p; | |
5014 | ||
5015 | p = xdr_reserve_space(xdr, 20); | |
5016 | if (!p) | |
5017 | return nfserr_resource; | |
5018 | ||
5019 | encode_cinfo(p, &setxattr->setxa_cinfo); | |
5020 | ||
5021 | return 0; | |
5022 | } | |
5023 | ||
5024 | /* | |
5025 | * See if there are cookie values that can be rejected outright. | |
5026 | */ | |
5027 | static __be32 | |
5028 | nfsd4_listxattr_validate_cookie(struct nfsd4_listxattrs *listxattrs, | |
5029 | u32 *offsetp) | |
5030 | { | |
5031 | u64 cookie = listxattrs->lsxa_cookie; | |
5032 | ||
5033 | /* | |
5034 | * If the cookie is larger than the maximum number we can fit | |
5035 | * in either the buffer we just got back from vfs_listxattr, or, | |
5036 | * XDR-encoded, in the return buffer, it's invalid. | |
5037 | */ | |
5038 | if (cookie > (listxattrs->lsxa_len) / (XATTR_USER_PREFIX_LEN + 2)) | |
5039 | return nfserr_badcookie; | |
5040 | ||
5041 | if (cookie > (listxattrs->lsxa_maxcount / | |
5042 | (XDR_QUADLEN(XATTR_USER_PREFIX_LEN + 2) + 4))) | |
5043 | return nfserr_badcookie; | |
5044 | ||
5045 | *offsetp = (u32)cookie; | |
5046 | return 0; | |
5047 | } | |
5048 | ||
5049 | static __be32 | |
5050 | nfsd4_encode_listxattrs(struct nfsd4_compoundres *resp, __be32 nfserr, | |
5051 | struct nfsd4_listxattrs *listxattrs) | |
5052 | { | |
5053 | struct xdr_stream *xdr = &resp->xdr; | |
5054 | u32 cookie_offset, count_offset, eof; | |
5055 | u32 left, xdrleft, slen, count; | |
5056 | u32 xdrlen, offset; | |
5057 | u64 cookie; | |
5058 | char *sp; | |
b9a49237 | 5059 | __be32 status, tmp; |
23e50fe3 FL |
5060 | __be32 *p; |
5061 | u32 nuser; | |
5062 | ||
5063 | eof = 1; | |
5064 | ||
5065 | status = nfsd4_listxattr_validate_cookie(listxattrs, &offset); | |
5066 | if (status) | |
5067 | goto out; | |
5068 | ||
5069 | /* | |
5070 | * Reserve space for the cookie and the name array count. Record | |
5071 | * the offsets to save them later. | |
5072 | */ | |
5073 | cookie_offset = xdr->buf->len; | |
5074 | count_offset = cookie_offset + 8; | |
5075 | p = xdr_reserve_space(xdr, 12); | |
5076 | if (!p) { | |
5077 | status = nfserr_resource; | |
5078 | goto out; | |
5079 | } | |
5080 | ||
5081 | count = 0; | |
5082 | left = listxattrs->lsxa_len; | |
5083 | sp = listxattrs->lsxa_buf; | |
5084 | nuser = 0; | |
5085 | ||
5086 | xdrleft = listxattrs->lsxa_maxcount; | |
5087 | ||
5088 | while (left > 0 && xdrleft > 0) { | |
5089 | slen = strlen(sp); | |
5090 | ||
5091 | /* | |
4cce11fa | 5092 | * Check if this is a "user." attribute, skip it if not. |
23e50fe3 FL |
5093 | */ |
5094 | if (strncmp(sp, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) | |
5095 | goto contloop; | |
5096 | ||
5097 | slen -= XATTR_USER_PREFIX_LEN; | |
5098 | xdrlen = 4 + ((slen + 3) & ~3); | |
5099 | if (xdrlen > xdrleft) { | |
5100 | if (count == 0) { | |
5101 | /* | |
5102 | * Can't even fit the first attribute name. | |
5103 | */ | |
5104 | status = nfserr_toosmall; | |
5105 | goto out; | |
5106 | } | |
5107 | eof = 0; | |
5108 | goto wreof; | |
5109 | } | |
5110 | ||
5111 | left -= XATTR_USER_PREFIX_LEN; | |
5112 | sp += XATTR_USER_PREFIX_LEN; | |
5113 | if (nuser++ < offset) | |
5114 | goto contloop; | |
5115 | ||
5116 | ||
5117 | p = xdr_reserve_space(xdr, xdrlen); | |
5118 | if (!p) { | |
5119 | status = nfserr_resource; | |
5120 | goto out; | |
5121 | } | |
5122 | ||
e2a1840e | 5123 | xdr_encode_opaque(p, sp, slen); |
23e50fe3 FL |
5124 | |
5125 | xdrleft -= xdrlen; | |
5126 | count++; | |
5127 | contloop: | |
5128 | sp += slen + 1; | |
5129 | left -= slen + 1; | |
5130 | } | |
5131 | ||
5132 | /* | |
5133 | * If there were user attributes to copy, but we didn't copy | |
5134 | * any, the offset was too large (e.g. the cookie was invalid). | |
5135 | */ | |
5136 | if (nuser > 0 && count == 0) { | |
5137 | status = nfserr_badcookie; | |
5138 | goto out; | |
5139 | } | |
5140 | ||
5141 | wreof: | |
5142 | p = xdr_reserve_space(xdr, 4); | |
5143 | if (!p) { | |
5144 | status = nfserr_resource; | |
5145 | goto out; | |
5146 | } | |
5147 | *p = cpu_to_be32(eof); | |
5148 | ||
5149 | cookie = offset + count; | |
5150 | ||
5151 | write_bytes_to_xdr_buf(xdr->buf, cookie_offset, &cookie, 8); | |
b9a49237 CL |
5152 | tmp = cpu_to_be32(count); |
5153 | write_bytes_to_xdr_buf(xdr->buf, count_offset, &tmp, 4); | |
23e50fe3 FL |
5154 | out: |
5155 | if (listxattrs->lsxa_len) | |
5156 | kvfree(listxattrs->lsxa_buf); | |
5157 | return status; | |
5158 | } | |
5159 | ||
5160 | static __be32 | |
5161 | nfsd4_encode_removexattr(struct nfsd4_compoundres *resp, __be32 nfserr, | |
5162 | struct nfsd4_removexattr *removexattr) | |
5163 | { | |
5164 | struct xdr_stream *xdr = &resp->xdr; | |
5165 | __be32 *p; | |
5166 | ||
5167 | p = xdr_reserve_space(xdr, 20); | |
5168 | if (!p) | |
5169 | return nfserr_resource; | |
5170 | ||
5171 | p = encode_cinfo(p, &removexattr->rmxa_cinfo); | |
5172 | return 0; | |
5173 | } | |
5174 | ||
695e12f8 BH |
5175 | typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); |
5176 | ||
2db134eb AA |
5177 | /* |
5178 | * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 | |
5179 | * since we don't need to filter out obsolete ops as this is | |
5180 | * done in the decoding phase. | |
5181 | */ | |
c1df609d | 5182 | static const nfsd4_enc nfsd4_enc_ops[] = { |
ad1060c8 BF |
5183 | [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, |
5184 | [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, | |
5185 | [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, | |
5186 | [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, | |
5187 | [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, | |
5188 | [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, | |
5189 | [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, | |
5190 | [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, | |
5191 | [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, | |
5192 | [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, | |
5193 | [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, | |
5194 | [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, | |
5195 | [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, | |
5196 | [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, | |
5197 | [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, | |
5198 | [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, | |
84f09f46 | 5199 | [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, |
ad1060c8 BF |
5200 | [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, |
5201 | [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, | |
5202 | [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, | |
5203 | [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, | |
5204 | [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, | |
5205 | [OP_READ] = (nfsd4_enc)nfsd4_encode_read, | |
5206 | [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, | |
5207 | [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, | |
5208 | [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, | |
5209 | [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, | |
5210 | [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, | |
5211 | [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, | |
5212 | [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, | |
5213 | [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, | |
5214 | [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, | |
5215 | [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, | |
5216 | [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, | |
5217 | [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, | |
5218 | [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, | |
5219 | [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, | |
2db134eb AA |
5220 | |
5221 | /* NFSv4.1 operations */ | |
5222 | [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, | |
1d1bc8f2 | 5223 | [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, |
2db134eb AA |
5224 | [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, |
5225 | [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, | |
43212cc7 KM |
5226 | [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, |
5227 | [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, | |
2db134eb | 5228 | [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
9cf514cc CH |
5229 | #ifdef CONFIG_NFSD_PNFS |
5230 | [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_getdeviceinfo, | |
5231 | [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, | |
5232 | [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_layoutcommit, | |
5233 | [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_layoutget, | |
5234 | [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_layoutreturn, | |
5235 | #else | |
2db134eb AA |
5236 | [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, |
5237 | [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, | |
5238 | [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, | |
5239 | [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, | |
5240 | [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, | |
9cf514cc | 5241 | #endif |
22b6dee8 | 5242 | [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, |
2db134eb AA |
5243 | [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, |
5244 | [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, | |
17456804 | 5245 | [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, |
2db134eb AA |
5246 | [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
5247 | [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, | |
5248 | [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, | |
87a15a80 AS |
5249 | |
5250 | /* NFSv4.2 operations */ | |
5251 | [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, | |
29ae7f9d | 5252 | [OP_COPY] = (nfsd4_enc)nfsd4_encode_copy, |
51911868 | 5253 | [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_copy_notify, |
87a15a80 AS |
5254 | [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, |
5255 | [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, | |
5256 | [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, | |
5257 | [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, | |
5258 | [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, | |
6308bc98 | 5259 | [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_offload_status, |
528b8493 | 5260 | [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_read_plus, |
24bab491 | 5261 | [OP_SEEK] = (nfsd4_enc)nfsd4_encode_seek, |
87a15a80 | 5262 | [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, |
ffa0160a | 5263 | [OP_CLONE] = (nfsd4_enc)nfsd4_encode_noop, |
23e50fe3 FL |
5264 | |
5265 | /* RFC 8276 extended atributes operations */ | |
5266 | [OP_GETXATTR] = (nfsd4_enc)nfsd4_encode_getxattr, | |
5267 | [OP_SETXATTR] = (nfsd4_enc)nfsd4_encode_setxattr, | |
5268 | [OP_LISTXATTRS] = (nfsd4_enc)nfsd4_encode_listxattrs, | |
5269 | [OP_REMOVEXATTR] = (nfsd4_enc)nfsd4_encode_removexattr, | |
695e12f8 BH |
5270 | }; |
5271 | ||
496c262c | 5272 | /* |
a8095f7e BF |
5273 | * Calculate whether we still have space to encode repsize bytes. |
5274 | * There are two considerations: | |
5275 | * - For NFS versions >=4.1, the size of the reply must stay within | |
5276 | * session limits | |
5277 | * - For all NFS versions, we must stay within limited preallocated | |
5278 | * buffer space. | |
496c262c | 5279 | * |
a8095f7e BF |
5280 | * This is called before the operation is processed, so can only provide |
5281 | * an upper estimate. For some nonidempotent operations (such as | |
5282 | * getattr), it's not necessarily a problem if that estimate is wrong, | |
5283 | * as we can fail it after processing without significant side effects. | |
496c262c | 5284 | */ |
a8095f7e | 5285 | __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) |
496c262c | 5286 | { |
67492c99 | 5287 | struct xdr_buf *buf = &resp->rqstp->rq_res; |
47ee5298 | 5288 | struct nfsd4_slot *slot = resp->cstate.slot; |
496c262c | 5289 | |
47ee5298 BF |
5290 | if (buf->len + respsize <= buf->buflen) |
5291 | return nfs_ok; | |
5292 | if (!nfsd4_has_session(&resp->cstate)) | |
ea8d7720 | 5293 | return nfserr_resource; |
47ee5298 BF |
5294 | if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { |
5295 | WARN_ON_ONCE(1); | |
5296 | return nfserr_rep_too_big_to_cache; | |
ea8d7720 | 5297 | } |
47ee5298 | 5298 | return nfserr_rep_too_big; |
496c262c AA |
5299 | } |
5300 | ||
1da177e4 LT |
5301 | void |
5302 | nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) | |
5303 | { | |
082d4bd7 | 5304 | struct xdr_stream *xdr = &resp->xdr; |
9411b1d4 | 5305 | struct nfs4_stateowner *so = resp->cstate.replay_owner; |
5f4ab945 | 5306 | struct svc_rqst *rqstp = resp->rqstp; |
34b1744c | 5307 | const struct nfsd4_operation *opdesc = op->opdesc; |
082d4bd7 | 5308 | int post_err_offset; |
07d1f802 | 5309 | nfsd4_enc encoder; |
bc749ca4 | 5310 | __be32 *p; |
1da177e4 | 5311 | |
d0a381dd BF |
5312 | p = xdr_reserve_space(xdr, 8); |
5313 | if (!p) { | |
5314 | WARN_ON_ONCE(1); | |
5315 | return; | |
5316 | } | |
c373b0a4 | 5317 | *p++ = cpu_to_be32(op->opnum); |
082d4bd7 | 5318 | post_err_offset = xdr->buf->len; |
1da177e4 | 5319 | |
695e12f8 BH |
5320 | if (op->opnum == OP_ILLEGAL) |
5321 | goto status; | |
b7571e4c BF |
5322 | if (op->status && opdesc && |
5323 | !(opdesc->op_flags & OP_NONTRIVIAL_ERROR_ENCODE)) | |
5324 | goto status; | |
3a237b4a | 5325 | BUG_ON(op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || |
695e12f8 | 5326 | !nfsd4_enc_ops[op->opnum]); |
07d1f802 BF |
5327 | encoder = nfsd4_enc_ops[op->opnum]; |
5328 | op->status = encoder(resp, op->status, &op->u); | |
08281341 CL |
5329 | if (op->status) |
5330 | trace_nfsd_compound_encode_err(rqstp, op->opnum, op->status); | |
34b1744c BF |
5331 | if (opdesc && opdesc->op_release) |
5332 | opdesc->op_release(&op->u); | |
2825a7f9 BF |
5333 | xdr_commit_encode(xdr); |
5334 | ||
067e1ace | 5335 | /* nfsd4_check_resp_size guarantees enough room for error status */ |
5f4ab945 BF |
5336 | if (!op->status) { |
5337 | int space_needed = 0; | |
5338 | if (!nfsd4_last_compound_op(rqstp)) | |
5339 | space_needed = COMPOUND_ERR_SLACK_SPACE; | |
5340 | op->status = nfsd4_check_resp_size(resp, space_needed); | |
5341 | } | |
c8f13d97 BF |
5342 | if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { |
5343 | struct nfsd4_slot *slot = resp->cstate.slot; | |
5344 | ||
5345 | if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) | |
5346 | op->status = nfserr_rep_too_big_to_cache; | |
5347 | else | |
5348 | op->status = nfserr_rep_too_big; | |
5349 | } | |
07d1f802 BF |
5350 | if (op->status == nfserr_resource || |
5351 | op->status == nfserr_rep_too_big || | |
5352 | op->status == nfserr_rep_too_big_to_cache) { | |
5353 | /* | |
5354 | * The operation may have already been encoded or | |
5355 | * partially encoded. No op returns anything additional | |
5356 | * in the case of one of these three errors, so we can | |
5357 | * just truncate back to after the status. But it's a | |
5358 | * bug if we had to do this on a non-idempotent op: | |
5359 | */ | |
5360 | warn_on_nonidempotent_op(op); | |
082d4bd7 | 5361 | xdr_truncate_encode(xdr, post_err_offset); |
07d1f802 | 5362 | } |
9411b1d4 | 5363 | if (so) { |
082d4bd7 BF |
5364 | int len = xdr->buf->len - post_err_offset; |
5365 | ||
9411b1d4 | 5366 | so->so_replay.rp_status = op->status; |
082d4bd7 BF |
5367 | so->so_replay.rp_buflen = len; |
5368 | read_bytes_from_xdr_buf(xdr->buf, post_err_offset, | |
5369 | so->so_replay.rp_buf, len); | |
9411b1d4 | 5370 | } |
695e12f8 | 5371 | status: |
082d4bd7 BF |
5372 | /* Note that op->status is already in network byte order: */ |
5373 | write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); | |
1da177e4 LT |
5374 | } |
5375 | ||
5376 | /* | |
5377 | * Encode the reply stored in the stateowner reply cache | |
5378 | * | |
5379 | * XDR note: do not encode rp->rp_buflen: the buffer contains the | |
5380 | * previously sent already encoded operation. | |
1da177e4 LT |
5381 | */ |
5382 | void | |
d0a381dd | 5383 | nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) |
1da177e4 | 5384 | { |
bc749ca4 | 5385 | __be32 *p; |
1da177e4 LT |
5386 | struct nfs4_replay *rp = op->replay; |
5387 | ||
d0a381dd BF |
5388 | p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); |
5389 | if (!p) { | |
5390 | WARN_ON_ONCE(1); | |
5391 | return; | |
5392 | } | |
c373b0a4 | 5393 | *p++ = cpu_to_be32(op->opnum); |
1da177e4 | 5394 | *p++ = rp->rp_status; /* already xdr'ed */ |
1da177e4 | 5395 | |
0c0c267b | 5396 | p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); |
1da177e4 LT |
5397 | } |
5398 | ||
8537488b | 5399 | void nfsd4_release_compoundargs(struct svc_rqst *rqstp) |
1da177e4 | 5400 | { |
3e98abff BF |
5401 | struct nfsd4_compoundargs *args = rqstp->rq_argp; |
5402 | ||
1da177e4 LT |
5403 | if (args->ops != args->iops) { |
5404 | kfree(args->ops); | |
5405 | args->ops = args->iops; | |
5406 | } | |
1da177e4 | 5407 | while (args->to_free) { |
d5e23383 | 5408 | struct svcxdr_tmpbuf *tb = args->to_free; |
1da177e4 | 5409 | args->to_free = tb->next; |
1da177e4 LT |
5410 | kfree(tb); |
5411 | } | |
5412 | } | |
5413 | ||
5414 | int | |
026fec7e | 5415 | nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 5416 | { |
026fec7e CH |
5417 | struct nfsd4_compoundargs *args = rqstp->rq_argp; |
5418 | ||
c1346a12 | 5419 | /* svcxdr_tmp_alloc */ |
1da177e4 | 5420 | args->to_free = NULL; |
c1346a12 CL |
5421 | |
5422 | args->xdr = &rqstp->rq_arg_stream; | |
1da177e4 LT |
5423 | args->ops = args->iops; |
5424 | args->rqstp = rqstp; | |
5425 | ||
d9b74bda | 5426 | return nfsd4_decode_compound(args); |
1da177e4 LT |
5427 | } |
5428 | ||
5429 | int | |
63f8de37 | 5430 | nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p) |
1da177e4 | 5431 | { |
63f8de37 | 5432 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
6ac90391 BF |
5433 | struct xdr_buf *buf = resp->xdr.buf; |
5434 | ||
5435 | WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + | |
5436 | buf->tail[0].iov_len); | |
dd97fdde | 5437 | |
cc028a10 CL |
5438 | *p = resp->cstate.status; |
5439 | ||
2825a7f9 BF |
5440 | rqstp->rq_next_page = resp->xdr.page_ptr + 1; |
5441 | ||
1da177e4 LT |
5442 | p = resp->tagp; |
5443 | *p++ = htonl(resp->taglen); | |
5444 | memcpy(p, resp->tag, resp->taglen); | |
5445 | p += XDR_QUADLEN(resp->taglen); | |
5446 | *p++ = htonl(resp->opcnt); | |
5447 | ||
b607664e | 5448 | nfsd4_sequence_done(resp); |
1da177e4 LT |
5449 | return 1; |
5450 | } | |
5451 | ||
5452 | /* | |
5453 | * Local variables: | |
5454 | * c-basic-offset: 8 | |
5455 | * End: | |
5456 | */ |