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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 | ||
5a0e3ad6 | 36 | #include <linux/slab.h> |
1da177e4 | 37 | #include <linux/namei.h> |
341eb184 | 38 | #include <linux/statfs.h> |
0733d213 | 39 | #include <linux/utsname.h> |
17456804 | 40 | #include <linux/pagemap.h> |
4796f457 | 41 | #include <linux/sunrpc/svcauth_gss.h> |
9a74af21 | 42 | |
2ca72e17 BF |
43 | #include "idmap.h" |
44 | #include "acl.h" | |
9a74af21 | 45 | #include "xdr4.h" |
0a3adade | 46 | #include "vfs.h" |
17456804 | 47 | #include "state.h" |
1091006c | 48 | #include "cache.h" |
3d733711 | 49 | #include "netns.h" |
2ca72e17 | 50 | |
18032ca0 DQ |
51 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
52 | #include <linux/security.h> | |
53 | #endif | |
54 | ||
55 | ||
1da177e4 LT |
56 | #define NFSDDBG_FACILITY NFSDDBG_XDR |
57 | ||
42ca0993 BF |
58 | /* |
59 | * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing | |
60 | * directory in order to indicate to the client that a filesystem boundary is present | |
61 | * We use a fixed fsid for a referral | |
62 | */ | |
63 | #define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL | |
64 | #define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL | |
65 | ||
b37ad28b | 66 | static __be32 |
a36b1725 | 67 | check_filename(char *str, int len) |
1da177e4 LT |
68 | { |
69 | int i; | |
70 | ||
71 | if (len == 0) | |
72 | return nfserr_inval; | |
73 | if (isdotent(str, len)) | |
a36b1725 | 74 | return nfserr_badname; |
1da177e4 LT |
75 | for (i = 0; i < len; i++) |
76 | if (str[i] == '/') | |
a36b1725 | 77 | return nfserr_badname; |
1da177e4 LT |
78 | return 0; |
79 | } | |
80 | ||
1da177e4 | 81 | #define DECODE_HEAD \ |
2ebbc012 | 82 | __be32 *p; \ |
b37ad28b | 83 | __be32 status |
1da177e4 LT |
84 | #define DECODE_TAIL \ |
85 | status = 0; \ | |
86 | out: \ | |
87 | return status; \ | |
88 | xdr_error: \ | |
817cb9d4 CL |
89 | dprintk("NFSD: xdr error (%s:%d)\n", \ |
90 | __FILE__, __LINE__); \ | |
1da177e4 LT |
91 | status = nfserr_bad_xdr; \ |
92 | goto out | |
93 | ||
1da177e4 LT |
94 | #define READMEM(x,nbytes) do { \ |
95 | x = (char *)p; \ | |
96 | p += XDR_QUADLEN(nbytes); \ | |
97 | } while (0) | |
98 | #define SAVEMEM(x,nbytes) do { \ | |
99 | if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ | |
100 | savemem(argp, p, nbytes) : \ | |
101 | (char *)p)) { \ | |
817cb9d4 CL |
102 | dprintk("NFSD: xdr error (%s:%d)\n", \ |
103 | __FILE__, __LINE__); \ | |
1da177e4 LT |
104 | goto xdr_error; \ |
105 | } \ | |
106 | p += XDR_QUADLEN(nbytes); \ | |
107 | } while (0) | |
108 | #define COPYMEM(x,nbytes) do { \ | |
109 | memcpy((x), p, nbytes); \ | |
110 | p += XDR_QUADLEN(nbytes); \ | |
111 | } while (0) | |
112 | ||
113 | /* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ | |
114 | #define READ_BUF(nbytes) do { \ | |
115 | if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ | |
116 | p = argp->p; \ | |
117 | argp->p += XDR_QUADLEN(nbytes); \ | |
118 | } else if (!(p = read_buf(argp, nbytes))) { \ | |
817cb9d4 CL |
119 | dprintk("NFSD: xdr error (%s:%d)\n", \ |
120 | __FILE__, __LINE__); \ | |
1da177e4 LT |
121 | goto xdr_error; \ |
122 | } \ | |
123 | } while (0) | |
124 | ||
590b7431 BF |
125 | static void next_decode_page(struct nfsd4_compoundargs *argp) |
126 | { | |
590b7431 | 127 | argp->p = page_address(argp->pagelist[0]); |
365da4ad | 128 | argp->pagelist++; |
590b7431 BF |
129 | if (argp->pagelen < PAGE_SIZE) { |
130 | argp->end = argp->p + (argp->pagelen>>2); | |
131 | argp->pagelen = 0; | |
132 | } else { | |
133 | argp->end = argp->p + (PAGE_SIZE>>2); | |
134 | argp->pagelen -= PAGE_SIZE; | |
135 | } | |
136 | } | |
137 | ||
ca2a05aa | 138 | static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) |
1da177e4 LT |
139 | { |
140 | /* We want more bytes than seem to be available. | |
141 | * Maybe we need a new page, maybe we have just run out | |
142 | */ | |
ca2a05aa | 143 | unsigned int avail = (char *)argp->end - (char *)argp->p; |
2ebbc012 | 144 | __be32 *p; |
1da177e4 LT |
145 | if (avail + argp->pagelen < nbytes) |
146 | return NULL; | |
147 | if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ | |
148 | return NULL; | |
149 | /* ok, we can do it with the current plus the next page */ | |
150 | if (nbytes <= sizeof(argp->tmp)) | |
151 | p = argp->tmp; | |
152 | else { | |
f99d49ad | 153 | kfree(argp->tmpp); |
1da177e4 LT |
154 | p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); |
155 | if (!p) | |
156 | return NULL; | |
157 | ||
158 | } | |
ca2a05aa BF |
159 | /* |
160 | * The following memcpy is safe because read_buf is always | |
161 | * called with nbytes > avail, and the two cases above both | |
162 | * guarantee p points to at least nbytes bytes. | |
163 | */ | |
1da177e4 | 164 | memcpy(p, argp->p, avail); |
590b7431 | 165 | next_decode_page(argp); |
1da177e4 LT |
166 | memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); |
167 | argp->p += XDR_QUADLEN(nbytes - avail); | |
168 | return p; | |
169 | } | |
170 | ||
60adfc50 AA |
171 | static int zero_clientid(clientid_t *clid) |
172 | { | |
173 | return (clid->cl_boot == 0) && (clid->cl_id == 0); | |
174 | } | |
175 | ||
2d8498db | 176 | /** |
d5e23383 | 177 | * svcxdr_tmpalloc - allocate memory to be freed after compound processing |
ce043ac8 BF |
178 | * @argp: NFSv4 compound argument structure |
179 | * @p: pointer to be freed (with kfree()) | |
2d8498db CH |
180 | * |
181 | * Marks @p to be freed when processing the compound operation | |
182 | * described in @argp finishes. | |
183 | */ | |
d5e23383 BF |
184 | static void * |
185 | svcxdr_tmpalloc(struct nfsd4_compoundargs *argp, u32 len) | |
1da177e4 | 186 | { |
d5e23383 | 187 | struct svcxdr_tmpbuf *tb; |
1da177e4 | 188 | |
d5e23383 | 189 | tb = kmalloc(sizeof(*tb) + len, GFP_KERNEL); |
1da177e4 | 190 | if (!tb) |
d5e23383 | 191 | return NULL; |
1da177e4 LT |
192 | tb->next = argp->to_free; |
193 | argp->to_free = tb; | |
d5e23383 | 194 | return tb->buf; |
1da177e4 LT |
195 | } |
196 | ||
29c353b3 BF |
197 | /* |
198 | * For xdr strings that need to be passed to other kernel api's | |
199 | * as null-terminated strings. | |
200 | * | |
201 | * Note null-terminating in place usually isn't safe since the | |
202 | * buffer might end on a page boundary. | |
203 | */ | |
204 | static char * | |
205 | svcxdr_dupstr(struct nfsd4_compoundargs *argp, void *buf, u32 len) | |
206 | { | |
d5e23383 | 207 | char *p = svcxdr_tmpalloc(argp, len + 1); |
29c353b3 BF |
208 | |
209 | if (!p) | |
210 | return NULL; | |
211 | memcpy(p, buf, len); | |
212 | p[len] = '\0'; | |
29c353b3 | 213 | return p; |
1da177e4 LT |
214 | } |
215 | ||
2d8498db CH |
216 | /** |
217 | * savemem - duplicate a chunk of memory for later processing | |
218 | * @argp: NFSv4 compound argument structure to be freed with | |
219 | * @p: pointer to be duplicated | |
220 | * @nbytes: length to be duplicated | |
221 | * | |
222 | * Returns a pointer to a copy of @nbytes bytes of memory at @p | |
223 | * that are preserved until processing of the NFSv4 compound | |
224 | * operation described by @argp finishes. | |
225 | */ | |
2ebbc012 | 226 | static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) |
1da177e4 | 227 | { |
d5e23383 BF |
228 | void *ret; |
229 | ||
230 | ret = svcxdr_tmpalloc(argp, nbytes); | |
231 | if (!ret) | |
1da177e4 | 232 | return NULL; |
d5e23383 BF |
233 | memcpy(ret, p, nbytes); |
234 | return ret; | |
1da177e4 LT |
235 | } |
236 | ||
b37ad28b | 237 | static __be32 |
1da177e4 LT |
238 | nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) |
239 | { | |
240 | u32 bmlen; | |
241 | DECODE_HEAD; | |
242 | ||
243 | bmval[0] = 0; | |
244 | bmval[1] = 0; | |
7e705706 | 245 | bmval[2] = 0; |
1da177e4 LT |
246 | |
247 | READ_BUF(4); | |
06553991 | 248 | bmlen = be32_to_cpup(p++); |
1da177e4 LT |
249 | if (bmlen > 1000) |
250 | goto xdr_error; | |
251 | ||
252 | READ_BUF(bmlen << 2); | |
253 | if (bmlen > 0) | |
06553991 | 254 | bmval[0] = be32_to_cpup(p++); |
1da177e4 | 255 | if (bmlen > 1) |
06553991 | 256 | bmval[1] = be32_to_cpup(p++); |
7e705706 | 257 | if (bmlen > 2) |
06553991 | 258 | bmval[2] = be32_to_cpup(p++); |
1da177e4 LT |
259 | |
260 | DECODE_TAIL; | |
261 | } | |
262 | ||
b37ad28b | 263 | static __be32 |
3c8e0316 | 264 | nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, |
18032ca0 DQ |
265 | struct iattr *iattr, struct nfs4_acl **acl, |
266 | struct xdr_netobj *label) | |
1da177e4 LT |
267 | { |
268 | int expected_len, len = 0; | |
269 | u32 dummy32; | |
542d1ab3 | 270 | u64 sec; |
1da177e4 LT |
271 | char *buf; |
272 | ||
273 | DECODE_HEAD; | |
274 | iattr->ia_valid = 0; | |
275 | if ((status = nfsd4_decode_bitmap(argp, bmval))) | |
276 | return status; | |
277 | ||
1da177e4 | 278 | READ_BUF(4); |
06553991 | 279 | expected_len = be32_to_cpup(p++); |
1da177e4 LT |
280 | |
281 | if (bmval[0] & FATTR4_WORD0_SIZE) { | |
282 | READ_BUF(8); | |
283 | len += 8; | |
542d1ab3 | 284 | p = xdr_decode_hyper(p, &iattr->ia_size); |
1da177e4 LT |
285 | iattr->ia_valid |= ATTR_SIZE; |
286 | } | |
287 | if (bmval[0] & FATTR4_WORD0_ACL) { | |
64a817cf | 288 | u32 nace; |
28e05dd8 | 289 | struct nfs4_ace *ace; |
1da177e4 LT |
290 | |
291 | READ_BUF(4); len += 4; | |
06553991 | 292 | nace = be32_to_cpup(p++); |
1da177e4 | 293 | |
28e05dd8 | 294 | if (nace > NFS4_ACL_MAX) |
798df338 | 295 | return nfserr_fbig; |
28e05dd8 | 296 | |
d5e23383 | 297 | *acl = svcxdr_tmpalloc(argp, nfs4_acl_bytes(nace)); |
eba1c99c KM |
298 | if (*acl == NULL) |
299 | return nfserr_jukebox; | |
300 | ||
28e05dd8 BF |
301 | (*acl)->naces = nace; |
302 | for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { | |
1da177e4 | 303 | READ_BUF(16); len += 16; |
06553991 BF |
304 | ace->type = be32_to_cpup(p++); |
305 | ace->flag = be32_to_cpup(p++); | |
306 | ace->access_mask = be32_to_cpup(p++); | |
307 | dummy32 = be32_to_cpup(p++); | |
1da177e4 LT |
308 | READ_BUF(dummy32); |
309 | len += XDR_QUADLEN(dummy32) << 2; | |
310 | READMEM(buf, dummy32); | |
28e05dd8 | 311 | ace->whotype = nfs4_acl_get_whotype(buf, dummy32); |
3c726023 | 312 | status = nfs_ok; |
28e05dd8 | 313 | if (ace->whotype != NFS4_ACL_WHO_NAMED) |
ab8e4aee | 314 | ; |
28e05dd8 | 315 | else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
3c726023 | 316 | status = nfsd_map_name_to_gid(argp->rqstp, |
ab8e4aee | 317 | buf, dummy32, &ace->who_gid); |
1da177e4 | 318 | else |
3c726023 | 319 | status = nfsd_map_name_to_uid(argp->rqstp, |
ab8e4aee | 320 | buf, dummy32, &ace->who_uid); |
3c726023 BF |
321 | if (status) |
322 | return status; | |
1da177e4 LT |
323 | } |
324 | } else | |
325 | *acl = NULL; | |
326 | if (bmval[1] & FATTR4_WORD1_MODE) { | |
327 | READ_BUF(4); | |
328 | len += 4; | |
06553991 | 329 | iattr->ia_mode = be32_to_cpup(p++); |
1da177e4 LT |
330 | iattr->ia_mode &= (S_IFMT | S_IALLUGO); |
331 | iattr->ia_valid |= ATTR_MODE; | |
332 | } | |
333 | if (bmval[1] & FATTR4_WORD1_OWNER) { | |
334 | READ_BUF(4); | |
335 | len += 4; | |
06553991 | 336 | dummy32 = be32_to_cpup(p++); |
1da177e4 LT |
337 | READ_BUF(dummy32); |
338 | len += (XDR_QUADLEN(dummy32) << 2); | |
339 | READMEM(buf, dummy32); | |
47c85291 N |
340 | if ((status = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) |
341 | return status; | |
1da177e4 LT |
342 | iattr->ia_valid |= ATTR_UID; |
343 | } | |
344 | if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { | |
345 | READ_BUF(4); | |
346 | len += 4; | |
06553991 | 347 | dummy32 = be32_to_cpup(p++); |
1da177e4 LT |
348 | READ_BUF(dummy32); |
349 | len += (XDR_QUADLEN(dummy32) << 2); | |
350 | READMEM(buf, dummy32); | |
47c85291 N |
351 | if ((status = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) |
352 | return status; | |
1da177e4 LT |
353 | iattr->ia_valid |= ATTR_GID; |
354 | } | |
355 | if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { | |
356 | READ_BUF(4); | |
357 | len += 4; | |
06553991 | 358 | dummy32 = be32_to_cpup(p++); |
1da177e4 LT |
359 | switch (dummy32) { |
360 | case NFS4_SET_TO_CLIENT_TIME: | |
361 | /* We require the high 32 bits of 'seconds' to be 0, and we ignore | |
362 | all 32 bits of 'nseconds'. */ | |
363 | READ_BUF(12); | |
364 | len += 12; | |
542d1ab3 BF |
365 | p = xdr_decode_hyper(p, &sec); |
366 | iattr->ia_atime.tv_sec = (time_t)sec; | |
06553991 | 367 | iattr->ia_atime.tv_nsec = be32_to_cpup(p++); |
1da177e4 LT |
368 | if (iattr->ia_atime.tv_nsec >= (u32)1000000000) |
369 | return nfserr_inval; | |
370 | iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); | |
371 | break; | |
372 | case NFS4_SET_TO_SERVER_TIME: | |
373 | iattr->ia_valid |= ATTR_ATIME; | |
374 | break; | |
375 | default: | |
376 | goto xdr_error; | |
377 | } | |
378 | } | |
1da177e4 LT |
379 | if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { |
380 | READ_BUF(4); | |
381 | len += 4; | |
06553991 | 382 | dummy32 = be32_to_cpup(p++); |
1da177e4 LT |
383 | switch (dummy32) { |
384 | case NFS4_SET_TO_CLIENT_TIME: | |
385 | /* We require the high 32 bits of 'seconds' to be 0, and we ignore | |
386 | all 32 bits of 'nseconds'. */ | |
387 | READ_BUF(12); | |
388 | len += 12; | |
542d1ab3 BF |
389 | p = xdr_decode_hyper(p, &sec); |
390 | iattr->ia_mtime.tv_sec = sec; | |
06553991 | 391 | iattr->ia_mtime.tv_nsec = be32_to_cpup(p++); |
1da177e4 LT |
392 | if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) |
393 | return nfserr_inval; | |
394 | iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); | |
395 | break; | |
396 | case NFS4_SET_TO_SERVER_TIME: | |
397 | iattr->ia_valid |= ATTR_MTIME; | |
398 | break; | |
399 | default: | |
400 | goto xdr_error; | |
401 | } | |
402 | } | |
18032ca0 DQ |
403 | |
404 | label->len = 0; | |
405 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL | |
406 | if (bmval[2] & FATTR4_WORD2_SECURITY_LABEL) { | |
407 | READ_BUF(4); | |
408 | len += 4; | |
06553991 | 409 | dummy32 = be32_to_cpup(p++); /* lfs: we don't use it */ |
18032ca0 DQ |
410 | READ_BUF(4); |
411 | len += 4; | |
06553991 | 412 | dummy32 = be32_to_cpup(p++); /* pi: we don't use it either */ |
18032ca0 DQ |
413 | READ_BUF(4); |
414 | len += 4; | |
06553991 | 415 | dummy32 = be32_to_cpup(p++); |
18032ca0 DQ |
416 | READ_BUF(dummy32); |
417 | if (dummy32 > NFSD4_MAX_SEC_LABEL_LEN) | |
418 | return nfserr_badlabel; | |
419 | len += (XDR_QUADLEN(dummy32) << 2); | |
420 | READMEM(buf, dummy32); | |
29c353b3 BF |
421 | label->len = dummy32; |
422 | label->data = svcxdr_dupstr(argp, buf, dummy32); | |
18032ca0 DQ |
423 | if (!label->data) |
424 | return nfserr_jukebox; | |
18032ca0 DQ |
425 | } |
426 | #endif | |
427 | ||
3c8e0316 YZ |
428 | if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 |
429 | || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 | |
430 | || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) | |
431 | READ_BUF(expected_len - len); | |
432 | else if (len != expected_len) | |
1da177e4 LT |
433 | goto xdr_error; |
434 | ||
435 | DECODE_TAIL; | |
1da177e4 LT |
436 | } |
437 | ||
e31a1b66 BH |
438 | static __be32 |
439 | nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) | |
440 | { | |
441 | DECODE_HEAD; | |
442 | ||
443 | READ_BUF(sizeof(stateid_t)); | |
06553991 | 444 | sid->si_generation = be32_to_cpup(p++); |
e31a1b66 BH |
445 | COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); |
446 | ||
447 | DECODE_TAIL; | |
448 | } | |
449 | ||
b37ad28b | 450 | static __be32 |
1da177e4 LT |
451 | nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) |
452 | { | |
453 | DECODE_HEAD; | |
454 | ||
455 | READ_BUF(4); | |
06553991 | 456 | access->ac_req_access = be32_to_cpup(p++); |
1da177e4 LT |
457 | |
458 | DECODE_TAIL; | |
459 | } | |
460 | ||
acb2887e BF |
461 | static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs) |
462 | { | |
463 | DECODE_HEAD; | |
12fc3e92 | 464 | u32 dummy, uid, gid; |
acb2887e BF |
465 | char *machine_name; |
466 | int i; | |
467 | int nr_secflavs; | |
468 | ||
469 | /* callback_sec_params4 */ | |
470 | READ_BUF(4); | |
06553991 | 471 | nr_secflavs = be32_to_cpup(p++); |
57569a70 BF |
472 | if (nr_secflavs) |
473 | cbs->flavor = (u32)(-1); | |
474 | else | |
475 | /* Is this legal? Be generous, take it to mean AUTH_NONE: */ | |
476 | cbs->flavor = 0; | |
acb2887e BF |
477 | for (i = 0; i < nr_secflavs; ++i) { |
478 | READ_BUF(4); | |
06553991 | 479 | dummy = be32_to_cpup(p++); |
acb2887e BF |
480 | switch (dummy) { |
481 | case RPC_AUTH_NULL: | |
482 | /* Nothing to read */ | |
12fc3e92 BF |
483 | if (cbs->flavor == (u32)(-1)) |
484 | cbs->flavor = RPC_AUTH_NULL; | |
acb2887e BF |
485 | break; |
486 | case RPC_AUTH_UNIX: | |
487 | READ_BUF(8); | |
488 | /* stamp */ | |
06553991 | 489 | dummy = be32_to_cpup(p++); |
acb2887e BF |
490 | |
491 | /* machine name */ | |
06553991 | 492 | dummy = be32_to_cpup(p++); |
acb2887e BF |
493 | READ_BUF(dummy); |
494 | SAVEMEM(machine_name, dummy); | |
495 | ||
496 | /* uid, gid */ | |
497 | READ_BUF(8); | |
06553991 BF |
498 | uid = be32_to_cpup(p++); |
499 | gid = be32_to_cpup(p++); | |
acb2887e BF |
500 | |
501 | /* more gids */ | |
502 | READ_BUF(4); | |
06553991 | 503 | dummy = be32_to_cpup(p++); |
acb2887e | 504 | READ_BUF(dummy * 4); |
12fc3e92 | 505 | if (cbs->flavor == (u32)(-1)) { |
03bc6d1c EB |
506 | kuid_t kuid = make_kuid(&init_user_ns, uid); |
507 | kgid_t kgid = make_kgid(&init_user_ns, gid); | |
508 | if (uid_valid(kuid) && gid_valid(kgid)) { | |
509 | cbs->uid = kuid; | |
510 | cbs->gid = kgid; | |
511 | cbs->flavor = RPC_AUTH_UNIX; | |
512 | } else { | |
513 | dprintk("RPC_AUTH_UNIX with invalid" | |
514 | "uid or gid ignoring!\n"); | |
515 | } | |
12fc3e92 | 516 | } |
acb2887e BF |
517 | break; |
518 | case RPC_AUTH_GSS: | |
519 | dprintk("RPC_AUTH_GSS callback secflavor " | |
520 | "not supported!\n"); | |
521 | READ_BUF(8); | |
522 | /* gcbp_service */ | |
06553991 | 523 | dummy = be32_to_cpup(p++); |
acb2887e | 524 | /* gcbp_handle_from_server */ |
06553991 | 525 | dummy = be32_to_cpup(p++); |
acb2887e BF |
526 | READ_BUF(dummy); |
527 | p += XDR_QUADLEN(dummy); | |
528 | /* gcbp_handle_from_client */ | |
529 | READ_BUF(4); | |
06553991 | 530 | dummy = be32_to_cpup(p++); |
acb2887e BF |
531 | READ_BUF(dummy); |
532 | break; | |
533 | default: | |
534 | dprintk("Illegal callback secflavor\n"); | |
535 | return nfserr_inval; | |
536 | } | |
537 | } | |
538 | DECODE_TAIL; | |
539 | } | |
540 | ||
cb73a9f4 BF |
541 | static __be32 nfsd4_decode_backchannel_ctl(struct nfsd4_compoundargs *argp, struct nfsd4_backchannel_ctl *bc) |
542 | { | |
543 | DECODE_HEAD; | |
544 | ||
545 | READ_BUF(4); | |
06553991 | 546 | bc->bc_cb_program = be32_to_cpup(p++); |
cb73a9f4 BF |
547 | nfsd4_decode_cb_sec(argp, &bc->bc_cb_sec); |
548 | ||
549 | DECODE_TAIL; | |
550 | } | |
551 | ||
1d1bc8f2 BF |
552 | static __be32 nfsd4_decode_bind_conn_to_session(struct nfsd4_compoundargs *argp, struct nfsd4_bind_conn_to_session *bcts) |
553 | { | |
554 | DECODE_HEAD; | |
1d1bc8f2 BF |
555 | |
556 | READ_BUF(NFS4_MAX_SESSIONID_LEN + 8); | |
557 | COPYMEM(bcts->sessionid.data, NFS4_MAX_SESSIONID_LEN); | |
06553991 | 558 | bcts->dir = be32_to_cpup(p++); |
6ce2357f BS |
559 | /* XXX: skipping ctsa_use_conn_in_rdma_mode. Perhaps Tom Tucker |
560 | * could help us figure out we should be using it. */ | |
1d1bc8f2 BF |
561 | DECODE_TAIL; |
562 | } | |
563 | ||
b37ad28b | 564 | static __be32 |
1da177e4 LT |
565 | nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) |
566 | { | |
567 | DECODE_HEAD; | |
568 | ||
e31a1b66 | 569 | READ_BUF(4); |
06553991 | 570 | close->cl_seqid = be32_to_cpup(p++); |
e31a1b66 | 571 | return nfsd4_decode_stateid(argp, &close->cl_stateid); |
1da177e4 LT |
572 | |
573 | DECODE_TAIL; | |
574 | } | |
575 | ||
576 | ||
b37ad28b | 577 | static __be32 |
1da177e4 LT |
578 | nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) |
579 | { | |
580 | DECODE_HEAD; | |
581 | ||
582 | READ_BUF(12); | |
542d1ab3 | 583 | p = xdr_decode_hyper(p, &commit->co_offset); |
06553991 | 584 | commit->co_count = be32_to_cpup(p++); |
1da177e4 LT |
585 | |
586 | DECODE_TAIL; | |
587 | } | |
588 | ||
b37ad28b | 589 | static __be32 |
1da177e4 LT |
590 | nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) |
591 | { | |
592 | DECODE_HEAD; | |
593 | ||
594 | READ_BUF(4); | |
06553991 | 595 | create->cr_type = be32_to_cpup(p++); |
1da177e4 LT |
596 | switch (create->cr_type) { |
597 | case NF4LNK: | |
598 | READ_BUF(4); | |
7fb84306 BF |
599 | create->cr_datalen = be32_to_cpup(p++); |
600 | READ_BUF(create->cr_datalen); | |
29c353b3 | 601 | create->cr_data = svcxdr_dupstr(argp, p, create->cr_datalen); |
7fb84306 | 602 | if (!create->cr_data) |
76f47128 | 603 | return nfserr_jukebox; |
1da177e4 LT |
604 | break; |
605 | case NF4BLK: | |
606 | case NF4CHR: | |
607 | READ_BUF(8); | |
06553991 BF |
608 | create->cr_specdata1 = be32_to_cpup(p++); |
609 | create->cr_specdata2 = be32_to_cpup(p++); | |
1da177e4 LT |
610 | break; |
611 | case NF4SOCK: | |
612 | case NF4FIFO: | |
613 | case NF4DIR: | |
614 | default: | |
615 | break; | |
616 | } | |
617 | ||
618 | READ_BUF(4); | |
06553991 | 619 | create->cr_namelen = be32_to_cpup(p++); |
1da177e4 LT |
620 | READ_BUF(create->cr_namelen); |
621 | SAVEMEM(create->cr_name, create->cr_namelen); | |
a36b1725 | 622 | if ((status = check_filename(create->cr_name, create->cr_namelen))) |
1da177e4 LT |
623 | return status; |
624 | ||
3c8e0316 | 625 | status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, |
18032ca0 | 626 | &create->cr_acl, &create->cr_label); |
c0d6fc8a | 627 | if (status) |
1da177e4 LT |
628 | goto out; |
629 | ||
630 | DECODE_TAIL; | |
631 | } | |
632 | ||
b37ad28b | 633 | static inline __be32 |
1da177e4 LT |
634 | nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) |
635 | { | |
e31a1b66 | 636 | return nfsd4_decode_stateid(argp, &dr->dr_stateid); |
1da177e4 LT |
637 | } |
638 | ||
b37ad28b | 639 | static inline __be32 |
1da177e4 LT |
640 | nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) |
641 | { | |
642 | return nfsd4_decode_bitmap(argp, getattr->ga_bmval); | |
643 | } | |
644 | ||
b37ad28b | 645 | static __be32 |
1da177e4 LT |
646 | nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) |
647 | { | |
648 | DECODE_HEAD; | |
649 | ||
650 | READ_BUF(4); | |
06553991 | 651 | link->li_namelen = be32_to_cpup(p++); |
1da177e4 LT |
652 | READ_BUF(link->li_namelen); |
653 | SAVEMEM(link->li_name, link->li_namelen); | |
a36b1725 | 654 | if ((status = check_filename(link->li_name, link->li_namelen))) |
1da177e4 LT |
655 | return status; |
656 | ||
657 | DECODE_TAIL; | |
658 | } | |
659 | ||
b37ad28b | 660 | static __be32 |
1da177e4 LT |
661 | nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) |
662 | { | |
663 | DECODE_HEAD; | |
664 | ||
1da177e4 LT |
665 | /* |
666 | * type, reclaim(boolean), offset, length, new_lock_owner(boolean) | |
667 | */ | |
668 | READ_BUF(28); | |
06553991 | 669 | lock->lk_type = be32_to_cpup(p++); |
1da177e4 LT |
670 | if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) |
671 | goto xdr_error; | |
06553991 | 672 | lock->lk_reclaim = be32_to_cpup(p++); |
542d1ab3 BF |
673 | p = xdr_decode_hyper(p, &lock->lk_offset); |
674 | p = xdr_decode_hyper(p, &lock->lk_length); | |
06553991 | 675 | lock->lk_is_new = be32_to_cpup(p++); |
1da177e4 LT |
676 | |
677 | if (lock->lk_is_new) { | |
e31a1b66 | 678 | READ_BUF(4); |
06553991 | 679 | lock->lk_new_open_seqid = be32_to_cpup(p++); |
e31a1b66 BH |
680 | status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); |
681 | if (status) | |
682 | return status; | |
683 | READ_BUF(8 + sizeof(clientid_t)); | |
06553991 | 684 | lock->lk_new_lock_seqid = be32_to_cpup(p++); |
1da177e4 | 685 | COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); |
06553991 | 686 | lock->lk_new_owner.len = be32_to_cpup(p++); |
1da177e4 LT |
687 | READ_BUF(lock->lk_new_owner.len); |
688 | READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); | |
689 | } else { | |
e31a1b66 BH |
690 | status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); |
691 | if (status) | |
692 | return status; | |
693 | READ_BUF(4); | |
06553991 | 694 | lock->lk_old_lock_seqid = be32_to_cpup(p++); |
1da177e4 LT |
695 | } |
696 | ||
697 | DECODE_TAIL; | |
698 | } | |
699 | ||
b37ad28b | 700 | static __be32 |
1da177e4 LT |
701 | nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) |
702 | { | |
703 | DECODE_HEAD; | |
704 | ||
705 | READ_BUF(32); | |
06553991 | 706 | lockt->lt_type = be32_to_cpup(p++); |
1da177e4 LT |
707 | if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) |
708 | goto xdr_error; | |
542d1ab3 BF |
709 | p = xdr_decode_hyper(p, &lockt->lt_offset); |
710 | p = xdr_decode_hyper(p, &lockt->lt_length); | |
1da177e4 | 711 | COPYMEM(&lockt->lt_clientid, 8); |
06553991 | 712 | lockt->lt_owner.len = be32_to_cpup(p++); |
1da177e4 LT |
713 | READ_BUF(lockt->lt_owner.len); |
714 | READMEM(lockt->lt_owner.data, lockt->lt_owner.len); | |
715 | ||
716 | DECODE_TAIL; | |
717 | } | |
718 | ||
b37ad28b | 719 | static __be32 |
1da177e4 LT |
720 | nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) |
721 | { | |
722 | DECODE_HEAD; | |
723 | ||
e31a1b66 | 724 | READ_BUF(8); |
06553991 | 725 | locku->lu_type = be32_to_cpup(p++); |
1da177e4 LT |
726 | if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) |
727 | goto xdr_error; | |
06553991 | 728 | locku->lu_seqid = be32_to_cpup(p++); |
e31a1b66 BH |
729 | status = nfsd4_decode_stateid(argp, &locku->lu_stateid); |
730 | if (status) | |
731 | return status; | |
732 | READ_BUF(16); | |
542d1ab3 BF |
733 | p = xdr_decode_hyper(p, &locku->lu_offset); |
734 | p = xdr_decode_hyper(p, &locku->lu_length); | |
1da177e4 LT |
735 | |
736 | DECODE_TAIL; | |
737 | } | |
738 | ||
b37ad28b | 739 | static __be32 |
1da177e4 LT |
740 | nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) |
741 | { | |
742 | DECODE_HEAD; | |
743 | ||
744 | READ_BUF(4); | |
06553991 | 745 | lookup->lo_len = be32_to_cpup(p++); |
1da177e4 LT |
746 | READ_BUF(lookup->lo_len); |
747 | SAVEMEM(lookup->lo_name, lookup->lo_len); | |
a36b1725 | 748 | if ((status = check_filename(lookup->lo_name, lookup->lo_len))) |
1da177e4 LT |
749 | return status; |
750 | ||
751 | DECODE_TAIL; | |
752 | } | |
753 | ||
2c8bd7e0 | 754 | static __be32 nfsd4_decode_share_access(struct nfsd4_compoundargs *argp, u32 *share_access, u32 *deleg_want, u32 *deleg_when) |
04f9e664 BF |
755 | { |
756 | __be32 *p; | |
757 | u32 w; | |
758 | ||
759 | READ_BUF(4); | |
06553991 | 760 | w = be32_to_cpup(p++); |
2c8bd7e0 BH |
761 | *share_access = w & NFS4_SHARE_ACCESS_MASK; |
762 | *deleg_want = w & NFS4_SHARE_WANT_MASK; | |
763 | if (deleg_when) | |
764 | *deleg_when = w & NFS4_SHARE_WHEN_MASK; | |
765 | ||
04f9e664 BF |
766 | switch (w & NFS4_SHARE_ACCESS_MASK) { |
767 | case NFS4_SHARE_ACCESS_READ: | |
768 | case NFS4_SHARE_ACCESS_WRITE: | |
769 | case NFS4_SHARE_ACCESS_BOTH: | |
770 | break; | |
771 | default: | |
772 | return nfserr_bad_xdr; | |
773 | } | |
fc0d14fe | 774 | w &= ~NFS4_SHARE_ACCESS_MASK; |
04f9e664 BF |
775 | if (!w) |
776 | return nfs_ok; | |
777 | if (!argp->minorversion) | |
778 | return nfserr_bad_xdr; | |
779 | switch (w & NFS4_SHARE_WANT_MASK) { | |
780 | case NFS4_SHARE_WANT_NO_PREFERENCE: | |
781 | case NFS4_SHARE_WANT_READ_DELEG: | |
782 | case NFS4_SHARE_WANT_WRITE_DELEG: | |
783 | case NFS4_SHARE_WANT_ANY_DELEG: | |
784 | case NFS4_SHARE_WANT_NO_DELEG: | |
785 | case NFS4_SHARE_WANT_CANCEL: | |
786 | break; | |
787 | default: | |
788 | return nfserr_bad_xdr; | |
789 | } | |
92bac8c5 | 790 | w &= ~NFS4_SHARE_WANT_MASK; |
04f9e664 BF |
791 | if (!w) |
792 | return nfs_ok; | |
2c8bd7e0 BH |
793 | |
794 | if (!deleg_when) /* open_downgrade */ | |
795 | return nfserr_inval; | |
04f9e664 BF |
796 | switch (w) { |
797 | case NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL: | |
798 | case NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED: | |
c668fc6d BH |
799 | case (NFS4_SHARE_SIGNAL_DELEG_WHEN_RESRC_AVAIL | |
800 | NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED): | |
04f9e664 BF |
801 | return nfs_ok; |
802 | } | |
803 | xdr_error: | |
804 | return nfserr_bad_xdr; | |
805 | } | |
806 | ||
807 | static __be32 nfsd4_decode_share_deny(struct nfsd4_compoundargs *argp, u32 *x) | |
808 | { | |
809 | __be32 *p; | |
810 | ||
811 | READ_BUF(4); | |
06553991 | 812 | *x = be32_to_cpup(p++); |
04f9e664 | 813 | /* Note: unlinke access bits, deny bits may be zero. */ |
01cd4afa | 814 | if (*x & ~NFS4_SHARE_DENY_BOTH) |
04f9e664 BF |
815 | return nfserr_bad_xdr; |
816 | return nfs_ok; | |
817 | xdr_error: | |
818 | return nfserr_bad_xdr; | |
819 | } | |
820 | ||
a084daf5 BF |
821 | static __be32 nfsd4_decode_opaque(struct nfsd4_compoundargs *argp, struct xdr_netobj *o) |
822 | { | |
823 | __be32 *p; | |
824 | ||
825 | READ_BUF(4); | |
06553991 | 826 | o->len = be32_to_cpup(p++); |
a084daf5 BF |
827 | |
828 | if (o->len == 0 || o->len > NFS4_OPAQUE_LIMIT) | |
829 | return nfserr_bad_xdr; | |
830 | ||
831 | READ_BUF(o->len); | |
832 | SAVEMEM(o->data, o->len); | |
833 | return nfs_ok; | |
834 | xdr_error: | |
835 | return nfserr_bad_xdr; | |
836 | } | |
837 | ||
b37ad28b | 838 | static __be32 |
1da177e4 LT |
839 | nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) |
840 | { | |
841 | DECODE_HEAD; | |
2c8bd7e0 | 842 | u32 dummy; |
1da177e4 LT |
843 | |
844 | memset(open->op_bmval, 0, sizeof(open->op_bmval)); | |
845 | open->op_iattr.ia_valid = 0; | |
fe0750e5 | 846 | open->op_openowner = NULL; |
1da177e4 | 847 | |
9d313b17 | 848 | open->op_xdr_error = 0; |
1da177e4 | 849 | /* seqid, share_access, share_deny, clientid, ownerlen */ |
04f9e664 | 850 | READ_BUF(4); |
06553991 | 851 | open->op_seqid = be32_to_cpup(p++); |
2c8bd7e0 BH |
852 | /* decode, yet ignore deleg_when until supported */ |
853 | status = nfsd4_decode_share_access(argp, &open->op_share_access, | |
854 | &open->op_deleg_want, &dummy); | |
04f9e664 BF |
855 | if (status) |
856 | goto xdr_error; | |
857 | status = nfsd4_decode_share_deny(argp, &open->op_share_deny); | |
858 | if (status) | |
859 | goto xdr_error; | |
a084daf5 | 860 | READ_BUF(sizeof(clientid_t)); |
1da177e4 | 861 | COPYMEM(&open->op_clientid, sizeof(clientid_t)); |
a084daf5 BF |
862 | status = nfsd4_decode_opaque(argp, &open->op_owner); |
863 | if (status) | |
864 | goto xdr_error; | |
865 | READ_BUF(4); | |
06553991 | 866 | open->op_create = be32_to_cpup(p++); |
1da177e4 LT |
867 | switch (open->op_create) { |
868 | case NFS4_OPEN_NOCREATE: | |
869 | break; | |
870 | case NFS4_OPEN_CREATE: | |
871 | READ_BUF(4); | |
06553991 | 872 | open->op_createmode = be32_to_cpup(p++); |
1da177e4 LT |
873 | switch (open->op_createmode) { |
874 | case NFS4_CREATE_UNCHECKED: | |
875 | case NFS4_CREATE_GUARDED: | |
c0d6fc8a | 876 | status = nfsd4_decode_fattr(argp, open->op_bmval, |
18032ca0 | 877 | &open->op_iattr, &open->op_acl, &open->op_label); |
c0d6fc8a | 878 | if (status) |
1da177e4 LT |
879 | goto out; |
880 | break; | |
881 | case NFS4_CREATE_EXCLUSIVE: | |
ab4684d1 CL |
882 | READ_BUF(NFS4_VERIFIER_SIZE); |
883 | COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); | |
1da177e4 | 884 | break; |
79fb54ab BH |
885 | case NFS4_CREATE_EXCLUSIVE4_1: |
886 | if (argp->minorversion < 1) | |
887 | goto xdr_error; | |
ab4684d1 CL |
888 | READ_BUF(NFS4_VERIFIER_SIZE); |
889 | COPYMEM(open->op_verf.data, NFS4_VERIFIER_SIZE); | |
79fb54ab | 890 | status = nfsd4_decode_fattr(argp, open->op_bmval, |
18032ca0 | 891 | &open->op_iattr, &open->op_acl, &open->op_label); |
79fb54ab BH |
892 | if (status) |
893 | goto out; | |
894 | break; | |
1da177e4 LT |
895 | default: |
896 | goto xdr_error; | |
897 | } | |
898 | break; | |
899 | default: | |
900 | goto xdr_error; | |
901 | } | |
902 | ||
903 | /* open_claim */ | |
904 | READ_BUF(4); | |
06553991 | 905 | open->op_claim_type = be32_to_cpup(p++); |
1da177e4 LT |
906 | switch (open->op_claim_type) { |
907 | case NFS4_OPEN_CLAIM_NULL: | |
908 | case NFS4_OPEN_CLAIM_DELEGATE_PREV: | |
909 | READ_BUF(4); | |
06553991 | 910 | open->op_fname.len = be32_to_cpup(p++); |
1da177e4 LT |
911 | READ_BUF(open->op_fname.len); |
912 | SAVEMEM(open->op_fname.data, open->op_fname.len); | |
a36b1725 | 913 | if ((status = check_filename(open->op_fname.data, open->op_fname.len))) |
1da177e4 LT |
914 | return status; |
915 | break; | |
916 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
917 | READ_BUF(4); | |
06553991 | 918 | open->op_delegate_type = be32_to_cpup(p++); |
1da177e4 LT |
919 | break; |
920 | case NFS4_OPEN_CLAIM_DELEGATE_CUR: | |
e31a1b66 BH |
921 | status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); |
922 | if (status) | |
923 | return status; | |
924 | READ_BUF(4); | |
06553991 | 925 | open->op_fname.len = be32_to_cpup(p++); |
1da177e4 LT |
926 | READ_BUF(open->op_fname.len); |
927 | SAVEMEM(open->op_fname.data, open->op_fname.len); | |
a36b1725 | 928 | if ((status = check_filename(open->op_fname.data, open->op_fname.len))) |
1da177e4 LT |
929 | return status; |
930 | break; | |
8b289b2c BF |
931 | case NFS4_OPEN_CLAIM_FH: |
932 | case NFS4_OPEN_CLAIM_DELEG_PREV_FH: | |
933 | if (argp->minorversion < 1) | |
934 | goto xdr_error; | |
935 | /* void */ | |
936 | break; | |
937 | case NFS4_OPEN_CLAIM_DELEG_CUR_FH: | |
938 | if (argp->minorversion < 1) | |
939 | goto xdr_error; | |
940 | status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); | |
941 | if (status) | |
942 | return status; | |
943 | break; | |
1da177e4 LT |
944 | default: |
945 | goto xdr_error; | |
946 | } | |
947 | ||
948 | DECODE_TAIL; | |
949 | } | |
950 | ||
b37ad28b | 951 | static __be32 |
1da177e4 LT |
952 | nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) |
953 | { | |
954 | DECODE_HEAD; | |
e1a90ebd AS |
955 | |
956 | if (argp->minorversion >= 1) | |
957 | return nfserr_notsupp; | |
958 | ||
e31a1b66 BH |
959 | status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); |
960 | if (status) | |
961 | return status; | |
962 | READ_BUF(4); | |
06553991 | 963 | open_conf->oc_seqid = be32_to_cpup(p++); |
e1a90ebd | 964 | |
1da177e4 LT |
965 | DECODE_TAIL; |
966 | } | |
967 | ||
b37ad28b | 968 | static __be32 |
1da177e4 LT |
969 | nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) |
970 | { | |
971 | DECODE_HEAD; | |
972 | ||
e31a1b66 BH |
973 | status = nfsd4_decode_stateid(argp, &open_down->od_stateid); |
974 | if (status) | |
975 | return status; | |
04f9e664 | 976 | READ_BUF(4); |
06553991 | 977 | open_down->od_seqid = be32_to_cpup(p++); |
2c8bd7e0 BH |
978 | status = nfsd4_decode_share_access(argp, &open_down->od_share_access, |
979 | &open_down->od_deleg_want, NULL); | |
04f9e664 BF |
980 | if (status) |
981 | return status; | |
982 | status = nfsd4_decode_share_deny(argp, &open_down->od_share_deny); | |
983 | if (status) | |
984 | return status; | |
1da177e4 LT |
985 | DECODE_TAIL; |
986 | } | |
987 | ||
b37ad28b | 988 | static __be32 |
1da177e4 LT |
989 | nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) |
990 | { | |
991 | DECODE_HEAD; | |
992 | ||
993 | READ_BUF(4); | |
06553991 | 994 | putfh->pf_fhlen = be32_to_cpup(p++); |
1da177e4 LT |
995 | if (putfh->pf_fhlen > NFS4_FHSIZE) |
996 | goto xdr_error; | |
997 | READ_BUF(putfh->pf_fhlen); | |
998 | SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); | |
999 | ||
1000 | DECODE_TAIL; | |
1001 | } | |
1002 | ||
e1a90ebd AS |
1003 | static __be32 |
1004 | nfsd4_decode_putpubfh(struct nfsd4_compoundargs *argp, void *p) | |
1005 | { | |
1006 | if (argp->minorversion == 0) | |
1007 | return nfs_ok; | |
1008 | return nfserr_notsupp; | |
1009 | } | |
1010 | ||
b37ad28b | 1011 | static __be32 |
1da177e4 LT |
1012 | nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) |
1013 | { | |
1014 | DECODE_HEAD; | |
1015 | ||
e31a1b66 BH |
1016 | status = nfsd4_decode_stateid(argp, &read->rd_stateid); |
1017 | if (status) | |
1018 | return status; | |
1019 | READ_BUF(12); | |
542d1ab3 | 1020 | p = xdr_decode_hyper(p, &read->rd_offset); |
06553991 | 1021 | read->rd_length = be32_to_cpup(p++); |
1da177e4 LT |
1022 | |
1023 | DECODE_TAIL; | |
1024 | } | |
1025 | ||
b37ad28b | 1026 | static __be32 |
1da177e4 LT |
1027 | nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) |
1028 | { | |
1029 | DECODE_HEAD; | |
1030 | ||
1031 | READ_BUF(24); | |
542d1ab3 | 1032 | p = xdr_decode_hyper(p, &readdir->rd_cookie); |
1da177e4 | 1033 | COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); |
06553991 BF |
1034 | readdir->rd_dircount = be32_to_cpup(p++); |
1035 | readdir->rd_maxcount = be32_to_cpup(p++); | |
1da177e4 LT |
1036 | if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) |
1037 | goto out; | |
1038 | ||
1039 | DECODE_TAIL; | |
1040 | } | |
1041 | ||
b37ad28b | 1042 | static __be32 |
1da177e4 LT |
1043 | nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) |
1044 | { | |
1045 | DECODE_HEAD; | |
1046 | ||
1047 | READ_BUF(4); | |
06553991 | 1048 | remove->rm_namelen = be32_to_cpup(p++); |
1da177e4 LT |
1049 | READ_BUF(remove->rm_namelen); |
1050 | SAVEMEM(remove->rm_name, remove->rm_namelen); | |
a36b1725 | 1051 | if ((status = check_filename(remove->rm_name, remove->rm_namelen))) |
1da177e4 LT |
1052 | return status; |
1053 | ||
1054 | DECODE_TAIL; | |
1055 | } | |
1056 | ||
b37ad28b | 1057 | static __be32 |
1da177e4 LT |
1058 | nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) |
1059 | { | |
1060 | DECODE_HEAD; | |
1061 | ||
1062 | READ_BUF(4); | |
06553991 | 1063 | rename->rn_snamelen = be32_to_cpup(p++); |
1da177e4 LT |
1064 | READ_BUF(rename->rn_snamelen + 4); |
1065 | SAVEMEM(rename->rn_sname, rename->rn_snamelen); | |
06553991 | 1066 | rename->rn_tnamelen = be32_to_cpup(p++); |
1da177e4 LT |
1067 | READ_BUF(rename->rn_tnamelen); |
1068 | SAVEMEM(rename->rn_tname, rename->rn_tnamelen); | |
a36b1725 | 1069 | if ((status = check_filename(rename->rn_sname, rename->rn_snamelen))) |
1da177e4 | 1070 | return status; |
a36b1725 | 1071 | if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen))) |
1da177e4 LT |
1072 | return status; |
1073 | ||
1074 | DECODE_TAIL; | |
1075 | } | |
1076 | ||
b37ad28b | 1077 | static __be32 |
1da177e4 LT |
1078 | nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) |
1079 | { | |
1080 | DECODE_HEAD; | |
1081 | ||
e1a90ebd AS |
1082 | if (argp->minorversion >= 1) |
1083 | return nfserr_notsupp; | |
1084 | ||
1da177e4 LT |
1085 | READ_BUF(sizeof(clientid_t)); |
1086 | COPYMEM(clientid, sizeof(clientid_t)); | |
1087 | ||
1088 | DECODE_TAIL; | |
1089 | } | |
1090 | ||
dcb488a3 AA |
1091 | static __be32 |
1092 | nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, | |
1093 | struct nfsd4_secinfo *secinfo) | |
1094 | { | |
1095 | DECODE_HEAD; | |
1096 | ||
1097 | READ_BUF(4); | |
06553991 | 1098 | secinfo->si_namelen = be32_to_cpup(p++); |
dcb488a3 AA |
1099 | READ_BUF(secinfo->si_namelen); |
1100 | SAVEMEM(secinfo->si_name, secinfo->si_namelen); | |
a36b1725 | 1101 | status = check_filename(secinfo->si_name, secinfo->si_namelen); |
dcb488a3 AA |
1102 | if (status) |
1103 | return status; | |
1104 | DECODE_TAIL; | |
1105 | } | |
1106 | ||
04f4ad16 BF |
1107 | static __be32 |
1108 | nfsd4_decode_secinfo_no_name(struct nfsd4_compoundargs *argp, | |
1109 | struct nfsd4_secinfo_no_name *sin) | |
1110 | { | |
1111 | DECODE_HEAD; | |
1112 | ||
1113 | READ_BUF(4); | |
06553991 | 1114 | sin->sin_style = be32_to_cpup(p++); |
04f4ad16 BF |
1115 | DECODE_TAIL; |
1116 | } | |
1117 | ||
b37ad28b | 1118 | static __be32 |
1da177e4 LT |
1119 | nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) |
1120 | { | |
e31a1b66 | 1121 | __be32 status; |
1da177e4 | 1122 | |
e31a1b66 BH |
1123 | status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); |
1124 | if (status) | |
1125 | return status; | |
3c8e0316 | 1126 | return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, |
18032ca0 | 1127 | &setattr->sa_acl, &setattr->sa_label); |
1da177e4 LT |
1128 | } |
1129 | ||
b37ad28b | 1130 | static __be32 |
1da177e4 LT |
1131 | nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) |
1132 | { | |
1133 | DECODE_HEAD; | |
1134 | ||
e1a90ebd AS |
1135 | if (argp->minorversion >= 1) |
1136 | return nfserr_notsupp; | |
1137 | ||
ab4684d1 CL |
1138 | READ_BUF(NFS4_VERIFIER_SIZE); |
1139 | COPYMEM(setclientid->se_verf.data, NFS4_VERIFIER_SIZE); | |
1da177e4 | 1140 | |
a084daf5 BF |
1141 | status = nfsd4_decode_opaque(argp, &setclientid->se_name); |
1142 | if (status) | |
1143 | return nfserr_bad_xdr; | |
1144 | READ_BUF(8); | |
06553991 BF |
1145 | setclientid->se_callback_prog = be32_to_cpup(p++); |
1146 | setclientid->se_callback_netid_len = be32_to_cpup(p++); | |
1da177e4 LT |
1147 | |
1148 | READ_BUF(setclientid->se_callback_netid_len + 4); | |
1149 | SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); | |
06553991 | 1150 | setclientid->se_callback_addr_len = be32_to_cpup(p++); |
1da177e4 LT |
1151 | |
1152 | READ_BUF(setclientid->se_callback_addr_len + 4); | |
1153 | SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); | |
06553991 | 1154 | setclientid->se_callback_ident = be32_to_cpup(p++); |
1da177e4 LT |
1155 | |
1156 | DECODE_TAIL; | |
1157 | } | |
1158 | ||
b37ad28b | 1159 | static __be32 |
1da177e4 LT |
1160 | nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) |
1161 | { | |
1162 | DECODE_HEAD; | |
1163 | ||
e1a90ebd AS |
1164 | if (argp->minorversion >= 1) |
1165 | return nfserr_notsupp; | |
1166 | ||
ab4684d1 | 1167 | READ_BUF(8 + NFS4_VERIFIER_SIZE); |
1da177e4 | 1168 | COPYMEM(&scd_c->sc_clientid, 8); |
ab4684d1 | 1169 | COPYMEM(&scd_c->sc_confirm, NFS4_VERIFIER_SIZE); |
1da177e4 LT |
1170 | |
1171 | DECODE_TAIL; | |
1172 | } | |
1173 | ||
1174 | /* Also used for NVERIFY */ | |
b37ad28b | 1175 | static __be32 |
1da177e4 LT |
1176 | nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) |
1177 | { | |
1da177e4 LT |
1178 | DECODE_HEAD; |
1179 | ||
1180 | if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) | |
1181 | goto out; | |
1182 | ||
1183 | /* For convenience's sake, we compare raw xdr'd attributes in | |
e5f95703 BF |
1184 | * nfsd4_proc_verify */ |
1185 | ||
1da177e4 | 1186 | READ_BUF(4); |
06553991 | 1187 | verify->ve_attrlen = be32_to_cpup(p++); |
1da177e4 LT |
1188 | READ_BUF(verify->ve_attrlen); |
1189 | SAVEMEM(verify->ve_attrval, verify->ve_attrlen); | |
1190 | ||
1191 | DECODE_TAIL; | |
1192 | } | |
1193 | ||
b37ad28b | 1194 | static __be32 |
1da177e4 LT |
1195 | nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) |
1196 | { | |
1197 | int avail; | |
1da177e4 LT |
1198 | int len; |
1199 | DECODE_HEAD; | |
1200 | ||
e31a1b66 BH |
1201 | status = nfsd4_decode_stateid(argp, &write->wr_stateid); |
1202 | if (status) | |
1203 | return status; | |
1204 | READ_BUF(16); | |
542d1ab3 | 1205 | p = xdr_decode_hyper(p, &write->wr_offset); |
06553991 | 1206 | write->wr_stable_how = be32_to_cpup(p++); |
1da177e4 LT |
1207 | if (write->wr_stable_how > 2) |
1208 | goto xdr_error; | |
06553991 | 1209 | write->wr_buflen = be32_to_cpup(p++); |
1da177e4 LT |
1210 | |
1211 | /* Sorry .. no magic macros for this.. * | |
1212 | * READ_BUF(write->wr_buflen); | |
1213 | * SAVEMEM(write->wr_buf, write->wr_buflen); | |
1214 | */ | |
1215 | avail = (char*)argp->end - (char*)argp->p; | |
1216 | if (avail + argp->pagelen < write->wr_buflen) { | |
817cb9d4 CL |
1217 | dprintk("NFSD: xdr error (%s:%d)\n", |
1218 | __FILE__, __LINE__); | |
1da177e4 LT |
1219 | goto xdr_error; |
1220 | } | |
70cc7f75 BF |
1221 | write->wr_head.iov_base = p; |
1222 | write->wr_head.iov_len = avail; | |
70cc7f75 | 1223 | write->wr_pagelist = argp->pagelist; |
5a80a54d BF |
1224 | |
1225 | len = XDR_QUADLEN(write->wr_buflen) << 2; | |
1226 | if (len >= avail) { | |
1227 | int pages; | |
1228 | ||
1229 | len -= avail; | |
1230 | ||
1231 | pages = len >> PAGE_SHIFT; | |
1232 | argp->pagelist += pages; | |
1233 | argp->pagelen -= pages * PAGE_SIZE; | |
1234 | len -= pages * PAGE_SIZE; | |
1235 | ||
1236 | argp->p = (__be32 *)page_address(argp->pagelist[0]); | |
365da4ad | 1237 | argp->pagelist++; |
5a80a54d | 1238 | argp->end = argp->p + XDR_QUADLEN(PAGE_SIZE); |
1da177e4 | 1239 | } |
5a80a54d | 1240 | argp->p += XDR_QUADLEN(len); |
1da177e4 LT |
1241 | |
1242 | DECODE_TAIL; | |
1243 | } | |
1244 | ||
b37ad28b | 1245 | static __be32 |
1da177e4 LT |
1246 | nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) |
1247 | { | |
1248 | DECODE_HEAD; | |
1249 | ||
e1a90ebd AS |
1250 | if (argp->minorversion >= 1) |
1251 | return nfserr_notsupp; | |
1252 | ||
1da177e4 LT |
1253 | READ_BUF(12); |
1254 | COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); | |
06553991 | 1255 | rlockowner->rl_owner.len = be32_to_cpup(p++); |
1da177e4 LT |
1256 | READ_BUF(rlockowner->rl_owner.len); |
1257 | READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); | |
1258 | ||
60adfc50 AA |
1259 | if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) |
1260 | return nfserr_inval; | |
1da177e4 LT |
1261 | DECODE_TAIL; |
1262 | } | |
1263 | ||
2db134eb AA |
1264 | static __be32 |
1265 | nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, | |
0733d213 | 1266 | struct nfsd4_exchange_id *exid) |
2db134eb | 1267 | { |
5afa040b | 1268 | int dummy, tmp; |
0733d213 AA |
1269 | DECODE_HEAD; |
1270 | ||
1271 | READ_BUF(NFS4_VERIFIER_SIZE); | |
1272 | COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); | |
1273 | ||
a084daf5 BF |
1274 | status = nfsd4_decode_opaque(argp, &exid->clname); |
1275 | if (status) | |
1276 | return nfserr_bad_xdr; | |
0733d213 AA |
1277 | |
1278 | READ_BUF(4); | |
06553991 | 1279 | exid->flags = be32_to_cpup(p++); |
0733d213 AA |
1280 | |
1281 | /* Ignore state_protect4_a */ | |
1282 | READ_BUF(4); | |
06553991 | 1283 | exid->spa_how = be32_to_cpup(p++); |
0733d213 AA |
1284 | switch (exid->spa_how) { |
1285 | case SP4_NONE: | |
1286 | break; | |
1287 | case SP4_MACH_CRED: | |
1288 | /* spo_must_enforce */ | |
1289 | READ_BUF(4); | |
06553991 | 1290 | dummy = be32_to_cpup(p++); |
0733d213 AA |
1291 | READ_BUF(dummy * 4); |
1292 | p += dummy; | |
1293 | ||
1294 | /* spo_must_allow */ | |
1295 | READ_BUF(4); | |
06553991 | 1296 | dummy = be32_to_cpup(p++); |
0733d213 AA |
1297 | READ_BUF(dummy * 4); |
1298 | p += dummy; | |
1299 | break; | |
1300 | case SP4_SSV: | |
1301 | /* ssp_ops */ | |
1302 | READ_BUF(4); | |
06553991 | 1303 | dummy = be32_to_cpup(p++); |
0733d213 AA |
1304 | READ_BUF(dummy * 4); |
1305 | p += dummy; | |
1306 | ||
1307 | READ_BUF(4); | |
06553991 | 1308 | dummy = be32_to_cpup(p++); |
0733d213 AA |
1309 | READ_BUF(dummy * 4); |
1310 | p += dummy; | |
1311 | ||
1312 | /* ssp_hash_algs<> */ | |
1313 | READ_BUF(4); | |
06553991 | 1314 | tmp = be32_to_cpup(p++); |
5afa040b MJ |
1315 | while (tmp--) { |
1316 | READ_BUF(4); | |
06553991 | 1317 | dummy = be32_to_cpup(p++); |
5afa040b MJ |
1318 | READ_BUF(dummy); |
1319 | p += XDR_QUADLEN(dummy); | |
1320 | } | |
0733d213 AA |
1321 | |
1322 | /* ssp_encr_algs<> */ | |
1323 | READ_BUF(4); | |
06553991 | 1324 | tmp = be32_to_cpup(p++); |
5afa040b MJ |
1325 | while (tmp--) { |
1326 | READ_BUF(4); | |
06553991 | 1327 | dummy = be32_to_cpup(p++); |
5afa040b MJ |
1328 | READ_BUF(dummy); |
1329 | p += XDR_QUADLEN(dummy); | |
1330 | } | |
0733d213 AA |
1331 | |
1332 | /* ssp_window and ssp_num_gss_handles */ | |
1333 | READ_BUF(8); | |
06553991 BF |
1334 | dummy = be32_to_cpup(p++); |
1335 | dummy = be32_to_cpup(p++); | |
0733d213 AA |
1336 | break; |
1337 | default: | |
1338 | goto xdr_error; | |
1339 | } | |
1340 | ||
1341 | /* Ignore Implementation ID */ | |
1342 | READ_BUF(4); /* nfs_impl_id4 array length */ | |
06553991 | 1343 | dummy = be32_to_cpup(p++); |
0733d213 AA |
1344 | |
1345 | if (dummy > 1) | |
1346 | goto xdr_error; | |
1347 | ||
1348 | if (dummy == 1) { | |
1349 | /* nii_domain */ | |
1350 | READ_BUF(4); | |
06553991 | 1351 | dummy = be32_to_cpup(p++); |
0733d213 AA |
1352 | READ_BUF(dummy); |
1353 | p += XDR_QUADLEN(dummy); | |
1354 | ||
1355 | /* nii_name */ | |
1356 | READ_BUF(4); | |
06553991 | 1357 | dummy = be32_to_cpup(p++); |
0733d213 AA |
1358 | READ_BUF(dummy); |
1359 | p += XDR_QUADLEN(dummy); | |
1360 | ||
1361 | /* nii_date */ | |
1362 | READ_BUF(12); | |
1363 | p += 3; | |
1364 | } | |
1365 | DECODE_TAIL; | |
2db134eb AA |
1366 | } |
1367 | ||
1368 | static __be32 | |
1369 | nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, | |
1370 | struct nfsd4_create_session *sess) | |
1371 | { | |
ec6b5d7b | 1372 | DECODE_HEAD; |
ec6b5d7b | 1373 | u32 dummy; |
ec6b5d7b AA |
1374 | |
1375 | READ_BUF(16); | |
1376 | COPYMEM(&sess->clientid, 8); | |
06553991 BF |
1377 | sess->seqid = be32_to_cpup(p++); |
1378 | sess->flags = be32_to_cpup(p++); | |
ec6b5d7b AA |
1379 | |
1380 | /* Fore channel attrs */ | |
1381 | READ_BUF(28); | |
06553991 BF |
1382 | dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ |
1383 | sess->fore_channel.maxreq_sz = be32_to_cpup(p++); | |
1384 | sess->fore_channel.maxresp_sz = be32_to_cpup(p++); | |
1385 | sess->fore_channel.maxresp_cached = be32_to_cpup(p++); | |
1386 | sess->fore_channel.maxops = be32_to_cpup(p++); | |
1387 | sess->fore_channel.maxreqs = be32_to_cpup(p++); | |
1388 | sess->fore_channel.nr_rdma_attrs = be32_to_cpup(p++); | |
ec6b5d7b AA |
1389 | if (sess->fore_channel.nr_rdma_attrs == 1) { |
1390 | READ_BUF(4); | |
06553991 | 1391 | sess->fore_channel.rdma_attrs = be32_to_cpup(p++); |
ec6b5d7b AA |
1392 | } else if (sess->fore_channel.nr_rdma_attrs > 1) { |
1393 | dprintk("Too many fore channel attr bitmaps!\n"); | |
1394 | goto xdr_error; | |
1395 | } | |
1396 | ||
1397 | /* Back channel attrs */ | |
1398 | READ_BUF(28); | |
06553991 BF |
1399 | dummy = be32_to_cpup(p++); /* headerpadsz is always 0 */ |
1400 | sess->back_channel.maxreq_sz = be32_to_cpup(p++); | |
1401 | sess->back_channel.maxresp_sz = be32_to_cpup(p++); | |
1402 | sess->back_channel.maxresp_cached = be32_to_cpup(p++); | |
1403 | sess->back_channel.maxops = be32_to_cpup(p++); | |
1404 | sess->back_channel.maxreqs = be32_to_cpup(p++); | |
1405 | sess->back_channel.nr_rdma_attrs = be32_to_cpup(p++); | |
ec6b5d7b AA |
1406 | if (sess->back_channel.nr_rdma_attrs == 1) { |
1407 | READ_BUF(4); | |
06553991 | 1408 | sess->back_channel.rdma_attrs = be32_to_cpup(p++); |
ec6b5d7b AA |
1409 | } else if (sess->back_channel.nr_rdma_attrs > 1) { |
1410 | dprintk("Too many back channel attr bitmaps!\n"); | |
1411 | goto xdr_error; | |
1412 | } | |
1413 | ||
acb2887e | 1414 | READ_BUF(4); |
06553991 | 1415 | sess->callback_prog = be32_to_cpup(p++); |
acb2887e | 1416 | nfsd4_decode_cb_sec(argp, &sess->cb_sec); |
ec6b5d7b | 1417 | DECODE_TAIL; |
2db134eb AA |
1418 | } |
1419 | ||
1420 | static __be32 | |
1421 | nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, | |
1422 | struct nfsd4_destroy_session *destroy_session) | |
1423 | { | |
e10e0cfc BH |
1424 | DECODE_HEAD; |
1425 | READ_BUF(NFS4_MAX_SESSIONID_LEN); | |
1426 | COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); | |
1427 | ||
1428 | DECODE_TAIL; | |
2db134eb AA |
1429 | } |
1430 | ||
e1ca12df BS |
1431 | static __be32 |
1432 | nfsd4_decode_free_stateid(struct nfsd4_compoundargs *argp, | |
1433 | struct nfsd4_free_stateid *free_stateid) | |
1434 | { | |
1435 | DECODE_HEAD; | |
1436 | ||
1437 | READ_BUF(sizeof(stateid_t)); | |
06553991 | 1438 | free_stateid->fr_stateid.si_generation = be32_to_cpup(p++); |
e1ca12df BS |
1439 | COPYMEM(&free_stateid->fr_stateid.si_opaque, sizeof(stateid_opaque_t)); |
1440 | ||
1441 | DECODE_TAIL; | |
1442 | } | |
1443 | ||
2db134eb AA |
1444 | static __be32 |
1445 | nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, | |
1446 | struct nfsd4_sequence *seq) | |
1447 | { | |
b85d4c01 BH |
1448 | DECODE_HEAD; |
1449 | ||
1450 | READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); | |
1451 | COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); | |
06553991 BF |
1452 | seq->seqid = be32_to_cpup(p++); |
1453 | seq->slotid = be32_to_cpup(p++); | |
1454 | seq->maxslots = be32_to_cpup(p++); | |
1455 | seq->cachethis = be32_to_cpup(p++); | |
b85d4c01 BH |
1456 | |
1457 | DECODE_TAIL; | |
2db134eb AA |
1458 | } |
1459 | ||
17456804 BS |
1460 | static __be32 |
1461 | nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid) | |
1462 | { | |
17456804 | 1463 | int i; |
03cfb420 BS |
1464 | __be32 *p, status; |
1465 | struct nfsd4_test_stateid_id *stateid; | |
17456804 BS |
1466 | |
1467 | READ_BUF(4); | |
1468 | test_stateid->ts_num_ids = ntohl(*p++); | |
1469 | ||
03cfb420 | 1470 | INIT_LIST_HEAD(&test_stateid->ts_stateid_list); |
17456804 BS |
1471 | |
1472 | for (i = 0; i < test_stateid->ts_num_ids; i++) { | |
d5e23383 | 1473 | stateid = svcxdr_tmpalloc(argp, sizeof(*stateid)); |
03cfb420 | 1474 | if (!stateid) { |
afcf6792 | 1475 | status = nfserrno(-ENOMEM); |
03cfb420 BS |
1476 | goto out; |
1477 | } | |
1478 | ||
03cfb420 BS |
1479 | INIT_LIST_HEAD(&stateid->ts_id_list); |
1480 | list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list); | |
1481 | ||
1482 | status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid); | |
17456804 | 1483 | if (status) |
03cfb420 | 1484 | goto out; |
17456804 BS |
1485 | } |
1486 | ||
1487 | status = 0; | |
1488 | out: | |
1489 | return status; | |
1490 | xdr_error: | |
1491 | dprintk("NFSD: xdr error (%s:%d)\n", __FILE__, __LINE__); | |
1492 | status = nfserr_bad_xdr; | |
1493 | goto out; | |
1494 | } | |
1495 | ||
345c2842 MJ |
1496 | static __be32 nfsd4_decode_destroy_clientid(struct nfsd4_compoundargs *argp, struct nfsd4_destroy_clientid *dc) |
1497 | { | |
1498 | DECODE_HEAD; | |
1499 | ||
1500 | READ_BUF(8); | |
1501 | COPYMEM(&dc->clientid, 8); | |
1502 | ||
1503 | DECODE_TAIL; | |
1504 | } | |
1505 | ||
4dc6ec00 BF |
1506 | static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) |
1507 | { | |
1508 | DECODE_HEAD; | |
1509 | ||
1510 | READ_BUF(4); | |
06553991 | 1511 | rc->rca_one_fs = be32_to_cpup(p++); |
4dc6ec00 BF |
1512 | |
1513 | DECODE_TAIL; | |
1514 | } | |
1515 | ||
347e0ad9 BH |
1516 | static __be32 |
1517 | nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) | |
1518 | { | |
1519 | return nfs_ok; | |
1520 | } | |
1521 | ||
3c375c6f BH |
1522 | static __be32 |
1523 | nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) | |
1524 | { | |
1e685ec2 | 1525 | return nfserr_notsupp; |
3c375c6f BH |
1526 | } |
1527 | ||
347e0ad9 BH |
1528 | typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); |
1529 | ||
1530 | static nfsd4_dec nfsd4_dec_ops[] = { | |
ad1060c8 BF |
1531 | [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, |
1532 | [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, | |
1533 | [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, | |
1534 | [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, | |
1535 | [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1536 | [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, | |
1537 | [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, | |
1538 | [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, | |
1539 | [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, | |
1540 | [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, | |
1541 | [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, | |
1542 | [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, | |
1543 | [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, | |
1544 | [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, | |
1545 | [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, | |
1546 | [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, | |
1547 | [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1548 | [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, | |
1549 | [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, | |
1550 | [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, | |
e1a90ebd | 1551 | [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_putpubfh, |
ad1060c8 BF |
1552 | [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, |
1553 | [OP_READ] = (nfsd4_dec)nfsd4_decode_read, | |
1554 | [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, | |
1555 | [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, | |
1556 | [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, | |
1557 | [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, | |
1558 | [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, | |
1559 | [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, | |
1560 | [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, | |
1561 | [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, | |
1562 | [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, | |
1563 | [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, | |
1564 | [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, | |
1565 | [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, | |
1566 | [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, | |
1567 | [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, | |
2db134eb AA |
1568 | |
1569 | /* new operations for NFSv4.1 */ | |
cb73a9f4 | 1570 | [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_backchannel_ctl, |
1d1bc8f2 | 1571 | [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_bind_conn_to_session, |
9064caae RD |
1572 | [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, |
1573 | [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, | |
1574 | [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, | |
e1ca12df | 1575 | [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_free_stateid, |
9064caae RD |
1576 | [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
1577 | [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1578 | [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1579 | [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1580 | [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1581 | [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, | |
04f4ad16 | 1582 | [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_secinfo_no_name, |
9064caae RD |
1583 | [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, |
1584 | [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, | |
17456804 | 1585 | [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_test_stateid, |
9064caae | 1586 | [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, |
345c2842 | 1587 | [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_destroy_clientid, |
4dc6ec00 | 1588 | [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, |
87a15a80 AS |
1589 | |
1590 | /* new operations for NFSv4.2 */ | |
1591 | [OP_ALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1592 | [OP_COPY] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1593 | [OP_COPY_NOTIFY] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1594 | [OP_DEALLOCATE] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1595 | [OP_IO_ADVISE] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1596 | [OP_LAYOUTERROR] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1597 | [OP_LAYOUTSTATS] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1598 | [OP_OFFLOAD_CANCEL] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1599 | [OP_OFFLOAD_STATUS] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1600 | [OP_READ_PLUS] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1601 | [OP_SEEK] = (nfsd4_dec)nfsd4_decode_notsupp, | |
1602 | [OP_WRITE_SAME] = (nfsd4_dec)nfsd4_decode_notsupp, | |
2db134eb AA |
1603 | }; |
1604 | ||
e1a90ebd AS |
1605 | static inline bool |
1606 | nfsd4_opnum_in_range(struct nfsd4_compoundargs *argp, struct nfsd4_op *op) | |
1607 | { | |
8217d146 | 1608 | if (op->opnum < FIRST_NFS4_OP) |
e1a90ebd | 1609 | return false; |
8217d146 | 1610 | else if (argp->minorversion == 0 && op->opnum > LAST_NFS40_OP) |
e1a90ebd | 1611 | return false; |
8217d146 AS |
1612 | else if (argp->minorversion == 1 && op->opnum > LAST_NFS41_OP) |
1613 | return false; | |
1614 | else if (argp->minorversion == 2 && op->opnum > LAST_NFS42_OP) | |
e1a90ebd AS |
1615 | return false; |
1616 | return true; | |
1617 | } | |
f2feb96b | 1618 | |
b37ad28b | 1619 | static __be32 |
1da177e4 LT |
1620 | nfsd4_decode_compound(struct nfsd4_compoundargs *argp) |
1621 | { | |
1622 | DECODE_HEAD; | |
1623 | struct nfsd4_op *op; | |
1091006c | 1624 | bool cachethis = false; |
a5cddc88 BF |
1625 | int auth_slack= argp->rqstp->rq_auth_slack; |
1626 | int max_reply = auth_slack + 8; /* opcnt, status */ | |
b0e35fda BF |
1627 | int readcount = 0; |
1628 | int readbytes = 0; | |
1da177e4 LT |
1629 | int i; |
1630 | ||
1da177e4 | 1631 | READ_BUF(4); |
06553991 | 1632 | argp->taglen = be32_to_cpup(p++); |
1da177e4 LT |
1633 | READ_BUF(argp->taglen + 8); |
1634 | SAVEMEM(argp->tag, argp->taglen); | |
06553991 BF |
1635 | argp->minorversion = be32_to_cpup(p++); |
1636 | argp->opcnt = be32_to_cpup(p++); | |
4f0cefbf | 1637 | max_reply += 4 + (XDR_QUADLEN(argp->taglen) << 2); |
1da177e4 LT |
1638 | |
1639 | if (argp->taglen > NFSD4_MAX_TAGLEN) | |
1640 | goto xdr_error; | |
1641 | if (argp->opcnt > 100) | |
1642 | goto xdr_error; | |
1643 | ||
e8c96f8c | 1644 | if (argp->opcnt > ARRAY_SIZE(argp->iops)) { |
5d6031ca | 1645 | argp->ops = kzalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); |
1da177e4 LT |
1646 | if (!argp->ops) { |
1647 | argp->ops = argp->iops; | |
817cb9d4 | 1648 | dprintk("nfsd: couldn't allocate room for COMPOUND\n"); |
1da177e4 LT |
1649 | goto xdr_error; |
1650 | } | |
1651 | } | |
1652 | ||
e1a90ebd | 1653 | if (argp->minorversion > NFSD_SUPPORTED_MINOR_VERSION) |
30cff1ff BH |
1654 | argp->opcnt = 0; |
1655 | ||
1da177e4 LT |
1656 | for (i = 0; i < argp->opcnt; i++) { |
1657 | op = &argp->ops[i]; | |
1658 | op->replay = NULL; | |
1659 | ||
8a61b18c | 1660 | READ_BUF(4); |
06553991 | 1661 | op->opnum = be32_to_cpup(p++); |
1da177e4 | 1662 | |
e1a90ebd AS |
1663 | if (nfsd4_opnum_in_range(argp, op)) |
1664 | op->status = nfsd4_dec_ops[op->opnum](argp, &op->u); | |
347e0ad9 | 1665 | else { |
1da177e4 LT |
1666 | op->opnum = OP_ILLEGAL; |
1667 | op->status = nfserr_op_illegal; | |
1da177e4 | 1668 | } |
1091006c BF |
1669 | /* |
1670 | * We'll try to cache the result in the DRC if any one | |
1671 | * op in the compound wants to be cached: | |
1672 | */ | |
1673 | cachethis |= nfsd4_cache_this_op(op); | |
6ff40dec | 1674 | |
b0e35fda BF |
1675 | if (op->opnum == OP_READ) { |
1676 | readcount++; | |
1677 | readbytes += nfsd4_max_reply(argp->rqstp, op); | |
1678 | } else | |
1679 | max_reply += nfsd4_max_reply(argp->rqstp, op); | |
f7b43d0c BF |
1680 | /* |
1681 | * OP_LOCK may return a conflicting lock. (Special case | |
1682 | * because it will just skip encoding this if it runs | |
1683 | * out of xdr buffer space, and it is the only operation | |
1684 | * that behaves this way.) | |
1685 | */ | |
1686 | if (op->opnum == OP_LOCK) | |
1687 | max_reply += NFS4_OPAQUE_LIMIT; | |
e372ba60 BF |
1688 | |
1689 | if (op->status) { | |
1690 | argp->opcnt = i+1; | |
1691 | break; | |
1692 | } | |
1da177e4 | 1693 | } |
1091006c BF |
1694 | /* Sessions make the DRC unnecessary: */ |
1695 | if (argp->minorversion) | |
1696 | cachethis = false; | |
b0e35fda | 1697 | svc_reserve(argp->rqstp, max_reply + readbytes); |
1091006c | 1698 | argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; |
1da177e4 | 1699 | |
a5cddc88 | 1700 | if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) |
b0e35fda BF |
1701 | argp->rqstp->rq_splice_ok = false; |
1702 | ||
1da177e4 LT |
1703 | DECODE_TAIL; |
1704 | } | |
1da177e4 | 1705 | |
d05d5744 | 1706 | static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode) |
c654b8a9 BF |
1707 | { |
1708 | if (IS_I_VERSION(inode)) { | |
d05d5744 | 1709 | p = xdr_encode_hyper(p, inode->i_version); |
c654b8a9 | 1710 | } else { |
d05d5744 BF |
1711 | *p++ = cpu_to_be32(stat->ctime.tv_sec); |
1712 | *p++ = cpu_to_be32(stat->ctime.tv_nsec); | |
c654b8a9 | 1713 | } |
d05d5744 | 1714 | return p; |
c654b8a9 BF |
1715 | } |
1716 | ||
d05d5744 | 1717 | static __be32 *encode_cinfo(__be32 *p, struct nfsd4_change_info *c) |
c654b8a9 | 1718 | { |
d05d5744 | 1719 | *p++ = cpu_to_be32(c->atomic); |
c654b8a9 | 1720 | if (c->change_supported) { |
d05d5744 BF |
1721 | p = xdr_encode_hyper(p, c->before_change); |
1722 | p = xdr_encode_hyper(p, c->after_change); | |
c654b8a9 | 1723 | } else { |
d05d5744 BF |
1724 | *p++ = cpu_to_be32(c->before_ctime_sec); |
1725 | *p++ = cpu_to_be32(c->before_ctime_nsec); | |
1726 | *p++ = cpu_to_be32(c->after_ctime_sec); | |
1727 | *p++ = cpu_to_be32(c->after_ctime_nsec); | |
c654b8a9 | 1728 | } |
d05d5744 | 1729 | return p; |
c654b8a9 | 1730 | } |
1da177e4 | 1731 | |
81c3f413 | 1732 | /* Encode as an array of strings the string given with components |
e7a0444a | 1733 | * separated @sep, escaped with esc_enter and esc_exit. |
81c3f413 | 1734 | */ |
ddd1ea56 BF |
1735 | static __be32 nfsd4_encode_components_esc(struct xdr_stream *xdr, char sep, |
1736 | char *components, char esc_enter, | |
1737 | char esc_exit) | |
81c3f413 | 1738 | { |
ddd1ea56 | 1739 | __be32 *p; |
082d4bd7 BF |
1740 | __be32 pathlen; |
1741 | int pathlen_offset; | |
81c3f413 | 1742 | int strlen, count=0; |
e7a0444a | 1743 | char *str, *end, *next; |
81c3f413 BF |
1744 | |
1745 | dprintk("nfsd4_encode_components(%s)\n", components); | |
082d4bd7 BF |
1746 | |
1747 | pathlen_offset = xdr->buf->len; | |
ddd1ea56 BF |
1748 | p = xdr_reserve_space(xdr, 4); |
1749 | if (!p) | |
81c3f413 | 1750 | return nfserr_resource; |
082d4bd7 BF |
1751 | p++; /* We will fill this in with @count later */ |
1752 | ||
81c3f413 BF |
1753 | end = str = components; |
1754 | while (*end) { | |
e7a0444a WAA |
1755 | bool found_esc = false; |
1756 | ||
1757 | /* try to parse as esc_start, ..., esc_end, sep */ | |
1758 | if (*str == esc_enter) { | |
1759 | for (; *end && (*end != esc_exit); end++) | |
1760 | /* find esc_exit or end of string */; | |
1761 | next = end + 1; | |
1762 | if (*end && (!*next || *next == sep)) { | |
1763 | str++; | |
1764 | found_esc = true; | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | if (!found_esc) | |
1769 | for (; *end && (*end != sep); end++) | |
1770 | /* find sep or end of string */; | |
1771 | ||
81c3f413 BF |
1772 | strlen = end - str; |
1773 | if (strlen) { | |
ddd1ea56 BF |
1774 | p = xdr_reserve_space(xdr, strlen + 4); |
1775 | if (!p) | |
81c3f413 | 1776 | return nfserr_resource; |
0c0c267b | 1777 | p = xdr_encode_opaque(p, str, strlen); |
81c3f413 BF |
1778 | count++; |
1779 | } | |
1780 | else | |
1781 | end++; | |
1782 | str = end; | |
1783 | } | |
082d4bd7 BF |
1784 | pathlen = htonl(xdr->buf->len - pathlen_offset); |
1785 | write_bytes_to_xdr_buf(xdr->buf, pathlen_offset, &pathlen, 4); | |
81c3f413 BF |
1786 | return 0; |
1787 | } | |
1788 | ||
e7a0444a WAA |
1789 | /* Encode as an array of strings the string given with components |
1790 | * separated @sep. | |
1791 | */ | |
ddd1ea56 BF |
1792 | static __be32 nfsd4_encode_components(struct xdr_stream *xdr, char sep, |
1793 | char *components) | |
e7a0444a | 1794 | { |
ddd1ea56 | 1795 | return nfsd4_encode_components_esc(xdr, sep, components, 0, 0); |
e7a0444a WAA |
1796 | } |
1797 | ||
81c3f413 BF |
1798 | /* |
1799 | * encode a location element of a fs_locations structure | |
1800 | */ | |
ddd1ea56 BF |
1801 | static __be32 nfsd4_encode_fs_location4(struct xdr_stream *xdr, |
1802 | struct nfsd4_fs_location *location) | |
81c3f413 | 1803 | { |
b37ad28b | 1804 | __be32 status; |
81c3f413 | 1805 | |
ddd1ea56 | 1806 | status = nfsd4_encode_components_esc(xdr, ':', location->hosts, |
e7a0444a | 1807 | '[', ']'); |
81c3f413 BF |
1808 | if (status) |
1809 | return status; | |
ddd1ea56 | 1810 | status = nfsd4_encode_components(xdr, '/', location->path); |
81c3f413 BF |
1811 | if (status) |
1812 | return status; | |
81c3f413 BF |
1813 | return 0; |
1814 | } | |
1815 | ||
1816 | /* | |
ed748aac | 1817 | * Encode a path in RFC3530 'pathname4' format |
81c3f413 | 1818 | */ |
ddd1ea56 BF |
1819 | static __be32 nfsd4_encode_path(struct xdr_stream *xdr, |
1820 | const struct path *root, | |
1821 | const struct path *path) | |
81c3f413 | 1822 | { |
301f0268 | 1823 | struct path cur = *path; |
ddd1ea56 | 1824 | __be32 *p; |
ed748aac TM |
1825 | struct dentry **components = NULL; |
1826 | unsigned int ncomponents = 0; | |
1827 | __be32 err = nfserr_jukebox; | |
81c3f413 | 1828 | |
ed748aac | 1829 | dprintk("nfsd4_encode_components("); |
81c3f413 | 1830 | |
ed748aac TM |
1831 | path_get(&cur); |
1832 | /* First walk the path up to the nfsd root, and store the | |
1833 | * dentries/path components in an array. | |
1834 | */ | |
1835 | for (;;) { | |
1836 | if (cur.dentry == root->dentry && cur.mnt == root->mnt) | |
1837 | break; | |
1838 | if (cur.dentry == cur.mnt->mnt_root) { | |
1839 | if (follow_up(&cur)) | |
1840 | continue; | |
1841 | goto out_free; | |
1842 | } | |
1843 | if ((ncomponents & 15) == 0) { | |
1844 | struct dentry **new; | |
1845 | new = krealloc(components, | |
1846 | sizeof(*new) * (ncomponents + 16), | |
1847 | GFP_KERNEL); | |
1848 | if (!new) | |
1849 | goto out_free; | |
1850 | components = new; | |
1851 | } | |
1852 | components[ncomponents++] = cur.dentry; | |
1853 | cur.dentry = dget_parent(cur.dentry); | |
1854 | } | |
ddd1ea56 BF |
1855 | err = nfserr_resource; |
1856 | p = xdr_reserve_space(xdr, 4); | |
1857 | if (!p) | |
ed748aac | 1858 | goto out_free; |
c373b0a4 | 1859 | *p++ = cpu_to_be32(ncomponents); |
ed748aac TM |
1860 | |
1861 | while (ncomponents) { | |
1862 | struct dentry *dentry = components[ncomponents - 1]; | |
301f0268 | 1863 | unsigned int len; |
ed748aac | 1864 | |
301f0268 AV |
1865 | spin_lock(&dentry->d_lock); |
1866 | len = dentry->d_name.len; | |
ddd1ea56 BF |
1867 | p = xdr_reserve_space(xdr, len + 4); |
1868 | if (!p) { | |
301f0268 | 1869 | spin_unlock(&dentry->d_lock); |
ed748aac | 1870 | goto out_free; |
301f0268 | 1871 | } |
0c0c267b | 1872 | p = xdr_encode_opaque(p, dentry->d_name.name, len); |
ed748aac | 1873 | dprintk("/%s", dentry->d_name.name); |
301f0268 | 1874 | spin_unlock(&dentry->d_lock); |
ed748aac TM |
1875 | dput(dentry); |
1876 | ncomponents--; | |
81c3f413 | 1877 | } |
ed748aac | 1878 | |
ed748aac TM |
1879 | err = 0; |
1880 | out_free: | |
1881 | dprintk(")\n"); | |
1882 | while (ncomponents) | |
1883 | dput(components[--ncomponents]); | |
1884 | kfree(components); | |
1885 | path_put(&cur); | |
1886 | return err; | |
1887 | } | |
1888 | ||
ddd1ea56 BF |
1889 | static __be32 nfsd4_encode_fsloc_fsroot(struct xdr_stream *xdr, |
1890 | struct svc_rqst *rqstp, const struct path *path) | |
ed748aac TM |
1891 | { |
1892 | struct svc_export *exp_ps; | |
1893 | __be32 res; | |
1894 | ||
1895 | exp_ps = rqst_find_fsidzero_export(rqstp); | |
1896 | if (IS_ERR(exp_ps)) | |
1897 | return nfserrno(PTR_ERR(exp_ps)); | |
ddd1ea56 | 1898 | res = nfsd4_encode_path(xdr, &exp_ps->ex_path, path); |
ed748aac TM |
1899 | exp_put(exp_ps); |
1900 | return res; | |
81c3f413 BF |
1901 | } |
1902 | ||
1903 | /* | |
1904 | * encode a fs_locations structure | |
1905 | */ | |
ddd1ea56 BF |
1906 | static __be32 nfsd4_encode_fs_locations(struct xdr_stream *xdr, |
1907 | struct svc_rqst *rqstp, struct svc_export *exp) | |
81c3f413 | 1908 | { |
b37ad28b | 1909 | __be32 status; |
cc45f017 | 1910 | int i; |
ddd1ea56 | 1911 | __be32 *p; |
81c3f413 | 1912 | struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; |
81c3f413 | 1913 | |
ddd1ea56 | 1914 | status = nfsd4_encode_fsloc_fsroot(xdr, rqstp, &exp->ex_path); |
81c3f413 BF |
1915 | if (status) |
1916 | return status; | |
ddd1ea56 BF |
1917 | p = xdr_reserve_space(xdr, 4); |
1918 | if (!p) | |
81c3f413 | 1919 | return nfserr_resource; |
c373b0a4 | 1920 | *p++ = cpu_to_be32(fslocs->locations_count); |
81c3f413 | 1921 | for (i=0; i<fslocs->locations_count; i++) { |
ddd1ea56 | 1922 | status = nfsd4_encode_fs_location4(xdr, &fslocs->locations[i]); |
81c3f413 BF |
1923 | if (status) |
1924 | return status; | |
1925 | } | |
81c3f413 BF |
1926 | return 0; |
1927 | } | |
1da177e4 | 1928 | |
3d2544b1 BF |
1929 | static u32 nfs4_file_type(umode_t mode) |
1930 | { | |
1931 | switch (mode & S_IFMT) { | |
1932 | case S_IFIFO: return NF4FIFO; | |
1933 | case S_IFCHR: return NF4CHR; | |
1934 | case S_IFDIR: return NF4DIR; | |
1935 | case S_IFBLK: return NF4BLK; | |
1936 | case S_IFLNK: return NF4LNK; | |
1937 | case S_IFREG: return NF4REG; | |
1938 | case S_IFSOCK: return NF4SOCK; | |
1939 | default: return NF4BAD; | |
1940 | }; | |
1941 | } | |
1da177e4 | 1942 | |
b37ad28b | 1943 | static inline __be32 |
ddd1ea56 BF |
1944 | nfsd4_encode_aclname(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
1945 | struct nfs4_ace *ace) | |
1da177e4 | 1946 | { |
3554116d | 1947 | if (ace->whotype != NFS4_ACL_WHO_NAMED) |
ddd1ea56 | 1948 | return nfs4_acl_write_who(xdr, ace->whotype); |
3554116d | 1949 | else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) |
ddd1ea56 | 1950 | return nfsd4_encode_group(xdr, rqstp, ace->who_gid); |
3554116d | 1951 | else |
ddd1ea56 | 1952 | return nfsd4_encode_user(xdr, rqstp, ace->who_uid); |
1da177e4 LT |
1953 | } |
1954 | ||
42ca0993 BF |
1955 | #define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ |
1956 | FATTR4_WORD0_RDATTR_ERROR) | |
1957 | #define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID | |
1958 | ||
18032ca0 DQ |
1959 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
1960 | static inline __be32 | |
ddd1ea56 BF |
1961 | nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
1962 | void *context, int len) | |
18032ca0 | 1963 | { |
ddd1ea56 | 1964 | __be32 *p; |
18032ca0 | 1965 | |
ddd1ea56 BF |
1966 | p = xdr_reserve_space(xdr, len + 4 + 4 + 4); |
1967 | if (!p) | |
18032ca0 DQ |
1968 | return nfserr_resource; |
1969 | ||
1970 | /* | |
1971 | * For now we use a 0 here to indicate the null translation; in | |
1972 | * the future we may place a call to translation code here. | |
1973 | */ | |
c373b0a4 BF |
1974 | *p++ = cpu_to_be32(0); /* lfs */ |
1975 | *p++ = cpu_to_be32(0); /* pi */ | |
18032ca0 | 1976 | p = xdr_encode_opaque(p, context, len); |
18032ca0 DQ |
1977 | return 0; |
1978 | } | |
1979 | #else | |
1980 | static inline __be32 | |
ddd1ea56 BF |
1981 | nfsd4_encode_security_label(struct xdr_stream *xdr, struct svc_rqst *rqstp, |
1982 | void *context, int len) | |
18032ca0 DQ |
1983 | { return 0; } |
1984 | #endif | |
1985 | ||
b37ad28b | 1986 | static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) |
42ca0993 BF |
1987 | { |
1988 | /* As per referral draft: */ | |
1989 | if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || | |
1990 | *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { | |
1991 | if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || | |
1992 | *bmval0 & FATTR4_WORD0_FS_LOCATIONS) | |
1993 | *rdattr_err = NFSERR_MOVED; | |
1994 | else | |
1995 | return nfserr_moved; | |
1996 | } | |
1997 | *bmval0 &= WORD0_ABSENT_FS_ATTRS; | |
1998 | *bmval1 &= WORD1_ABSENT_FS_ATTRS; | |
1999 | return 0; | |
2000 | } | |
1da177e4 | 2001 | |
ae7095a7 BF |
2002 | |
2003 | static int get_parent_attributes(struct svc_export *exp, struct kstat *stat) | |
2004 | { | |
2005 | struct path path = exp->ex_path; | |
2006 | int err; | |
2007 | ||
2008 | path_get(&path); | |
2009 | while (follow_up(&path)) { | |
2010 | if (path.dentry != path.mnt->mnt_root) | |
2011 | break; | |
2012 | } | |
3dadecce | 2013 | err = vfs_getattr(&path, stat); |
ae7095a7 BF |
2014 | path_put(&path); |
2015 | return err; | |
2016 | } | |
2017 | ||
1da177e4 LT |
2018 | /* |
2019 | * Note: @fhp can be NULL; in this case, we might have to compose the filehandle | |
2020 | * ourselves. | |
1da177e4 | 2021 | */ |
da2ebce6 | 2022 | static __be32 |
d5184658 BF |
2023 | nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp, |
2024 | struct svc_export *exp, | |
2025 | struct dentry *dentry, u32 *bmval, | |
406a7ea9 | 2026 | struct svc_rqst *rqstp, int ignore_crossmnt) |
1da177e4 LT |
2027 | { |
2028 | u32 bmval0 = bmval[0]; | |
2029 | u32 bmval1 = bmval[1]; | |
7e705706 | 2030 | u32 bmval2 = bmval[2]; |
1da177e4 | 2031 | struct kstat stat; |
d50e6136 | 2032 | struct svc_fh *tempfh = NULL; |
1da177e4 | 2033 | struct kstatfs statfs; |
ddd1ea56 | 2034 | __be32 *p; |
1fcea5b2 | 2035 | int starting_len = xdr->buf->len; |
082d4bd7 BF |
2036 | int attrlen_offset; |
2037 | __be32 attrlen; | |
1da177e4 LT |
2038 | u32 dummy; |
2039 | u64 dummy64; | |
42ca0993 | 2040 | u32 rdattr_err = 0; |
b37ad28b | 2041 | __be32 status; |
b8dd7b9a | 2042 | int err; |
1da177e4 LT |
2043 | int aclsupport = 0; |
2044 | struct nfs4_acl *acl = NULL; | |
18032ca0 DQ |
2045 | void *context = NULL; |
2046 | int contextlen; | |
2047 | bool contextsupport = false; | |
7e705706 AA |
2048 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
2049 | u32 minorversion = resp->cstate.minorversion; | |
ebabe9a9 CH |
2050 | struct path path = { |
2051 | .mnt = exp->ex_path.mnt, | |
2052 | .dentry = dentry, | |
2053 | }; | |
3d733711 | 2054 | struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); |
1da177e4 LT |
2055 | |
2056 | BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); | |
7e705706 AA |
2057 | BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); |
2058 | BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); | |
2059 | BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); | |
1da177e4 | 2060 | |
42ca0993 | 2061 | if (exp->ex_fslocs.migrated) { |
7e705706 | 2062 | BUG_ON(bmval[2]); |
42ca0993 BF |
2063 | status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); |
2064 | if (status) | |
2065 | goto out; | |
2066 | } | |
2067 | ||
3dadecce | 2068 | err = vfs_getattr(&path, &stat); |
b8dd7b9a | 2069 | if (err) |
1da177e4 | 2070 | goto out_nfserr; |
12337901 CH |
2071 | if ((bmval0 & (FATTR4_WORD0_FILES_AVAIL | FATTR4_WORD0_FILES_FREE | |
2072 | FATTR4_WORD0_FILES_TOTAL | FATTR4_WORD0_MAXNAME)) || | |
1da177e4 LT |
2073 | (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | |
2074 | FATTR4_WORD1_SPACE_TOTAL))) { | |
ebabe9a9 | 2075 | err = vfs_statfs(&path, &statfs); |
b8dd7b9a | 2076 | if (err) |
1da177e4 LT |
2077 | goto out_nfserr; |
2078 | } | |
2079 | if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { | |
d50e6136 BF |
2080 | tempfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); |
2081 | status = nfserr_jukebox; | |
2082 | if (!tempfh) | |
2083 | goto out; | |
2084 | fh_init(tempfh, NFS4_FHSIZE); | |
2085 | status = fh_compose(tempfh, exp, dentry, NULL); | |
1da177e4 LT |
2086 | if (status) |
2087 | goto out; | |
d50e6136 | 2088 | fhp = tempfh; |
1da177e4 LT |
2089 | } |
2090 | if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT | |
2091 | | FATTR4_WORD0_SUPPORTED_ATTRS)) { | |
b8dd7b9a AV |
2092 | err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); |
2093 | aclsupport = (err == 0); | |
1da177e4 | 2094 | if (bmval0 & FATTR4_WORD0_ACL) { |
b8dd7b9a | 2095 | if (err == -EOPNOTSUPP) |
1da177e4 | 2096 | bmval0 &= ~FATTR4_WORD0_ACL; |
b8dd7b9a | 2097 | else if (err == -EINVAL) { |
1da177e4 LT |
2098 | status = nfserr_attrnotsupp; |
2099 | goto out; | |
b8dd7b9a | 2100 | } else if (err != 0) |
1da177e4 LT |
2101 | goto out_nfserr; |
2102 | } | |
2103 | } | |
1da177e4 | 2104 | |
18032ca0 DQ |
2105 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
2106 | if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) || | |
2107 | bmval[0] & FATTR4_WORD0_SUPPORTED_ATTRS) { | |
2108 | err = security_inode_getsecctx(dentry->d_inode, | |
2109 | &context, &contextlen); | |
2110 | contextsupport = (err == 0); | |
2111 | if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { | |
2112 | if (err == -EOPNOTSUPP) | |
2113 | bmval2 &= ~FATTR4_WORD2_SECURITY_LABEL; | |
2114 | else if (err) | |
2115 | goto out_nfserr; | |
2116 | } | |
2117 | } | |
2118 | #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ | |
2119 | ||
2b44f1ba | 2120 | if (bmval2) { |
ddd1ea56 BF |
2121 | p = xdr_reserve_space(xdr, 16); |
2122 | if (!p) | |
2b44f1ba | 2123 | goto out_resource; |
c373b0a4 BF |
2124 | *p++ = cpu_to_be32(3); |
2125 | *p++ = cpu_to_be32(bmval0); | |
2126 | *p++ = cpu_to_be32(bmval1); | |
2127 | *p++ = cpu_to_be32(bmval2); | |
2b44f1ba | 2128 | } else if (bmval1) { |
ddd1ea56 BF |
2129 | p = xdr_reserve_space(xdr, 12); |
2130 | if (!p) | |
2b44f1ba | 2131 | goto out_resource; |
c373b0a4 BF |
2132 | *p++ = cpu_to_be32(2); |
2133 | *p++ = cpu_to_be32(bmval0); | |
2134 | *p++ = cpu_to_be32(bmval1); | |
7e705706 | 2135 | } else { |
ddd1ea56 BF |
2136 | p = xdr_reserve_space(xdr, 8); |
2137 | if (!p) | |
2b44f1ba | 2138 | goto out_resource; |
c373b0a4 BF |
2139 | *p++ = cpu_to_be32(1); |
2140 | *p++ = cpu_to_be32(bmval0); | |
7e705706 | 2141 | } |
082d4bd7 BF |
2142 | |
2143 | attrlen_offset = xdr->buf->len; | |
ddd1ea56 BF |
2144 | p = xdr_reserve_space(xdr, 4); |
2145 | if (!p) | |
2146 | goto out_resource; | |
082d4bd7 | 2147 | p++; /* to be backfilled later */ |
1da177e4 LT |
2148 | |
2149 | if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { | |
7e705706 AA |
2150 | u32 word0 = nfsd_suppattrs0(minorversion); |
2151 | u32 word1 = nfsd_suppattrs1(minorversion); | |
2152 | u32 word2 = nfsd_suppattrs2(minorversion); | |
2153 | ||
42ca0993 BF |
2154 | if (!aclsupport) |
2155 | word0 &= ~FATTR4_WORD0_ACL; | |
18032ca0 DQ |
2156 | if (!contextsupport) |
2157 | word2 &= ~FATTR4_WORD2_SECURITY_LABEL; | |
7e705706 | 2158 | if (!word2) { |
ddd1ea56 BF |
2159 | p = xdr_reserve_space(xdr, 12); |
2160 | if (!p) | |
2b44f1ba | 2161 | goto out_resource; |
c373b0a4 BF |
2162 | *p++ = cpu_to_be32(2); |
2163 | *p++ = cpu_to_be32(word0); | |
2164 | *p++ = cpu_to_be32(word1); | |
7e705706 | 2165 | } else { |
ddd1ea56 BF |
2166 | p = xdr_reserve_space(xdr, 16); |
2167 | if (!p) | |
2b44f1ba | 2168 | goto out_resource; |
c373b0a4 BF |
2169 | *p++ = cpu_to_be32(3); |
2170 | *p++ = cpu_to_be32(word0); | |
2171 | *p++ = cpu_to_be32(word1); | |
2172 | *p++ = cpu_to_be32(word2); | |
7e705706 | 2173 | } |
1da177e4 LT |
2174 | } |
2175 | if (bmval0 & FATTR4_WORD0_TYPE) { | |
ddd1ea56 BF |
2176 | p = xdr_reserve_space(xdr, 4); |
2177 | if (!p) | |
1da177e4 | 2178 | goto out_resource; |
3d2544b1 | 2179 | dummy = nfs4_file_type(stat.mode); |
6b6d8137 BF |
2180 | if (dummy == NF4BAD) { |
2181 | status = nfserr_serverfault; | |
2182 | goto out; | |
2183 | } | |
c373b0a4 | 2184 | *p++ = cpu_to_be32(dummy); |
1da177e4 LT |
2185 | } |
2186 | if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { | |
ddd1ea56 BF |
2187 | p = xdr_reserve_space(xdr, 4); |
2188 | if (!p) | |
1da177e4 | 2189 | goto out_resource; |
49640001 | 2190 | if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) |
c373b0a4 | 2191 | *p++ = cpu_to_be32(NFS4_FH_PERSISTENT); |
49640001 | 2192 | else |
c373b0a4 BF |
2193 | *p++ = cpu_to_be32(NFS4_FH_PERSISTENT| |
2194 | NFS4_FH_VOL_RENAME); | |
1da177e4 LT |
2195 | } |
2196 | if (bmval0 & FATTR4_WORD0_CHANGE) { | |
ddd1ea56 BF |
2197 | p = xdr_reserve_space(xdr, 8); |
2198 | if (!p) | |
1da177e4 | 2199 | goto out_resource; |
d05d5744 | 2200 | p = encode_change(p, &stat, dentry->d_inode); |
1da177e4 LT |
2201 | } |
2202 | if (bmval0 & FATTR4_WORD0_SIZE) { | |
ddd1ea56 BF |
2203 | p = xdr_reserve_space(xdr, 8); |
2204 | if (!p) | |
1da177e4 | 2205 | goto out_resource; |
b64c7f3b | 2206 | p = xdr_encode_hyper(p, stat.size); |
1da177e4 LT |
2207 | } |
2208 | if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { | |
ddd1ea56 BF |
2209 | p = xdr_reserve_space(xdr, 4); |
2210 | if (!p) | |
1da177e4 | 2211 | goto out_resource; |
c373b0a4 | 2212 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2213 | } |
2214 | if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { | |
ddd1ea56 BF |
2215 | p = xdr_reserve_space(xdr, 4); |
2216 | if (!p) | |
1da177e4 | 2217 | goto out_resource; |
c373b0a4 | 2218 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2219 | } |
2220 | if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { | |
ddd1ea56 BF |
2221 | p = xdr_reserve_space(xdr, 4); |
2222 | if (!p) | |
1da177e4 | 2223 | goto out_resource; |
c373b0a4 | 2224 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
2225 | } |
2226 | if (bmval0 & FATTR4_WORD0_FSID) { | |
ddd1ea56 BF |
2227 | p = xdr_reserve_space(xdr, 16); |
2228 | if (!p) | |
1da177e4 | 2229 | goto out_resource; |
42ca0993 | 2230 | if (exp->ex_fslocs.migrated) { |
b64c7f3b BF |
2231 | p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MAJOR); |
2232 | p = xdr_encode_hyper(p, NFS4_REFERRAL_FSID_MINOR); | |
af6a4e28 N |
2233 | } else switch(fsid_source(fhp)) { |
2234 | case FSIDSOURCE_FSID: | |
b64c7f3b BF |
2235 | p = xdr_encode_hyper(p, (u64)exp->ex_fsid); |
2236 | p = xdr_encode_hyper(p, (u64)0); | |
af6a4e28 N |
2237 | break; |
2238 | case FSIDSOURCE_DEV: | |
c373b0a4 BF |
2239 | *p++ = cpu_to_be32(0); |
2240 | *p++ = cpu_to_be32(MAJOR(stat.dev)); | |
2241 | *p++ = cpu_to_be32(0); | |
2242 | *p++ = cpu_to_be32(MINOR(stat.dev)); | |
af6a4e28 N |
2243 | break; |
2244 | case FSIDSOURCE_UUID: | |
94eb3689 KM |
2245 | p = xdr_encode_opaque_fixed(p, exp->ex_uuid, |
2246 | EX_UUID_LEN); | |
af6a4e28 | 2247 | break; |
1da177e4 LT |
2248 | } |
2249 | } | |
2250 | if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { | |
ddd1ea56 BF |
2251 | p = xdr_reserve_space(xdr, 4); |
2252 | if (!p) | |
1da177e4 | 2253 | goto out_resource; |
c373b0a4 | 2254 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
2255 | } |
2256 | if (bmval0 & FATTR4_WORD0_LEASE_TIME) { | |
ddd1ea56 BF |
2257 | p = xdr_reserve_space(xdr, 4); |
2258 | if (!p) | |
1da177e4 | 2259 | goto out_resource; |
c373b0a4 | 2260 | *p++ = cpu_to_be32(nn->nfsd4_lease); |
1da177e4 LT |
2261 | } |
2262 | if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { | |
ddd1ea56 BF |
2263 | p = xdr_reserve_space(xdr, 4); |
2264 | if (!p) | |
1da177e4 | 2265 | goto out_resource; |
c373b0a4 | 2266 | *p++ = cpu_to_be32(rdattr_err); |
1da177e4 LT |
2267 | } |
2268 | if (bmval0 & FATTR4_WORD0_ACL) { | |
2269 | struct nfs4_ace *ace; | |
1da177e4 LT |
2270 | |
2271 | if (acl == NULL) { | |
ddd1ea56 BF |
2272 | p = xdr_reserve_space(xdr, 4); |
2273 | if (!p) | |
1da177e4 LT |
2274 | goto out_resource; |
2275 | ||
c373b0a4 | 2276 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
2277 | goto out_acl; |
2278 | } | |
ddd1ea56 BF |
2279 | p = xdr_reserve_space(xdr, 4); |
2280 | if (!p) | |
1da177e4 | 2281 | goto out_resource; |
c373b0a4 | 2282 | *p++ = cpu_to_be32(acl->naces); |
1da177e4 | 2283 | |
28e05dd8 | 2284 | for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { |
ddd1ea56 BF |
2285 | p = xdr_reserve_space(xdr, 4*3); |
2286 | if (!p) | |
1da177e4 | 2287 | goto out_resource; |
c373b0a4 BF |
2288 | *p++ = cpu_to_be32(ace->type); |
2289 | *p++ = cpu_to_be32(ace->flag); | |
2290 | *p++ = cpu_to_be32(ace->access_mask & | |
2291 | NFS4_ACE_MASK_ALL); | |
ddd1ea56 | 2292 | status = nfsd4_encode_aclname(xdr, rqstp, ace); |
1da177e4 LT |
2293 | if (status) |
2294 | goto out; | |
2295 | } | |
2296 | } | |
2297 | out_acl: | |
2298 | if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { | |
ddd1ea56 BF |
2299 | p = xdr_reserve_space(xdr, 4); |
2300 | if (!p) | |
1da177e4 | 2301 | goto out_resource; |
c373b0a4 | 2302 | *p++ = cpu_to_be32(aclsupport ? |
1da177e4 LT |
2303 | ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); |
2304 | } | |
2305 | if (bmval0 & FATTR4_WORD0_CANSETTIME) { | |
ddd1ea56 BF |
2306 | p = xdr_reserve_space(xdr, 4); |
2307 | if (!p) | |
1da177e4 | 2308 | goto out_resource; |
c373b0a4 | 2309 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2310 | } |
2311 | if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { | |
ddd1ea56 BF |
2312 | p = xdr_reserve_space(xdr, 4); |
2313 | if (!p) | |
1da177e4 | 2314 | goto out_resource; |
c373b0a4 | 2315 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
2316 | } |
2317 | if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { | |
ddd1ea56 BF |
2318 | p = xdr_reserve_space(xdr, 4); |
2319 | if (!p) | |
1da177e4 | 2320 | goto out_resource; |
c373b0a4 | 2321 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2322 | } |
2323 | if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { | |
ddd1ea56 BF |
2324 | p = xdr_reserve_space(xdr, 4); |
2325 | if (!p) | |
1da177e4 | 2326 | goto out_resource; |
c373b0a4 | 2327 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2328 | } |
2329 | if (bmval0 & FATTR4_WORD0_FILEHANDLE) { | |
ddd1ea56 BF |
2330 | p = xdr_reserve_space(xdr, fhp->fh_handle.fh_size + 4); |
2331 | if (!p) | |
1da177e4 | 2332 | goto out_resource; |
0c0c267b BF |
2333 | p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, |
2334 | fhp->fh_handle.fh_size); | |
1da177e4 LT |
2335 | } |
2336 | if (bmval0 & FATTR4_WORD0_FILEID) { | |
ddd1ea56 BF |
2337 | p = xdr_reserve_space(xdr, 8); |
2338 | if (!p) | |
1da177e4 | 2339 | goto out_resource; |
b64c7f3b | 2340 | p = xdr_encode_hyper(p, stat.ino); |
1da177e4 LT |
2341 | } |
2342 | if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { | |
ddd1ea56 BF |
2343 | p = xdr_reserve_space(xdr, 8); |
2344 | if (!p) | |
1da177e4 | 2345 | goto out_resource; |
b64c7f3b | 2346 | p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
1da177e4 LT |
2347 | } |
2348 | if (bmval0 & FATTR4_WORD0_FILES_FREE) { | |
ddd1ea56 BF |
2349 | p = xdr_reserve_space(xdr, 8); |
2350 | if (!p) | |
1da177e4 | 2351 | goto out_resource; |
b64c7f3b | 2352 | p = xdr_encode_hyper(p, (u64) statfs.f_ffree); |
1da177e4 LT |
2353 | } |
2354 | if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { | |
ddd1ea56 BF |
2355 | p = xdr_reserve_space(xdr, 8); |
2356 | if (!p) | |
1da177e4 | 2357 | goto out_resource; |
b64c7f3b | 2358 | p = xdr_encode_hyper(p, (u64) statfs.f_files); |
1da177e4 | 2359 | } |
81c3f413 | 2360 | if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { |
ddd1ea56 | 2361 | status = nfsd4_encode_fs_locations(xdr, rqstp, exp); |
81c3f413 BF |
2362 | if (status) |
2363 | goto out; | |
2364 | } | |
1da177e4 | 2365 | if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { |
ddd1ea56 BF |
2366 | p = xdr_reserve_space(xdr, 4); |
2367 | if (!p) | |
1da177e4 | 2368 | goto out_resource; |
c373b0a4 | 2369 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2370 | } |
2371 | if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { | |
ddd1ea56 BF |
2372 | p = xdr_reserve_space(xdr, 8); |
2373 | if (!p) | |
1da177e4 | 2374 | goto out_resource; |
b64c7f3b | 2375 | p = xdr_encode_hyper(p, exp->ex_path.mnt->mnt_sb->s_maxbytes); |
1da177e4 LT |
2376 | } |
2377 | if (bmval0 & FATTR4_WORD0_MAXLINK) { | |
ddd1ea56 BF |
2378 | p = xdr_reserve_space(xdr, 4); |
2379 | if (!p) | |
1da177e4 | 2380 | goto out_resource; |
c373b0a4 | 2381 | *p++ = cpu_to_be32(255); |
1da177e4 LT |
2382 | } |
2383 | if (bmval0 & FATTR4_WORD0_MAXNAME) { | |
ddd1ea56 BF |
2384 | p = xdr_reserve_space(xdr, 4); |
2385 | if (!p) | |
1da177e4 | 2386 | goto out_resource; |
c373b0a4 | 2387 | *p++ = cpu_to_be32(statfs.f_namelen); |
1da177e4 LT |
2388 | } |
2389 | if (bmval0 & FATTR4_WORD0_MAXREAD) { | |
ddd1ea56 BF |
2390 | p = xdr_reserve_space(xdr, 8); |
2391 | if (!p) | |
1da177e4 | 2392 | goto out_resource; |
b64c7f3b | 2393 | p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
1da177e4 LT |
2394 | } |
2395 | if (bmval0 & FATTR4_WORD0_MAXWRITE) { | |
ddd1ea56 BF |
2396 | p = xdr_reserve_space(xdr, 8); |
2397 | if (!p) | |
1da177e4 | 2398 | goto out_resource; |
b64c7f3b | 2399 | p = xdr_encode_hyper(p, (u64) svc_max_payload(rqstp)); |
1da177e4 LT |
2400 | } |
2401 | if (bmval1 & FATTR4_WORD1_MODE) { | |
ddd1ea56 BF |
2402 | p = xdr_reserve_space(xdr, 4); |
2403 | if (!p) | |
1da177e4 | 2404 | goto out_resource; |
c373b0a4 | 2405 | *p++ = cpu_to_be32(stat.mode & S_IALLUGO); |
1da177e4 LT |
2406 | } |
2407 | if (bmval1 & FATTR4_WORD1_NO_TRUNC) { | |
ddd1ea56 BF |
2408 | p = xdr_reserve_space(xdr, 4); |
2409 | if (!p) | |
1da177e4 | 2410 | goto out_resource; |
c373b0a4 | 2411 | *p++ = cpu_to_be32(1); |
1da177e4 LT |
2412 | } |
2413 | if (bmval1 & FATTR4_WORD1_NUMLINKS) { | |
ddd1ea56 BF |
2414 | p = xdr_reserve_space(xdr, 4); |
2415 | if (!p) | |
1da177e4 | 2416 | goto out_resource; |
c373b0a4 | 2417 | *p++ = cpu_to_be32(stat.nlink); |
1da177e4 LT |
2418 | } |
2419 | if (bmval1 & FATTR4_WORD1_OWNER) { | |
ddd1ea56 | 2420 | status = nfsd4_encode_user(xdr, rqstp, stat.uid); |
1da177e4 LT |
2421 | if (status) |
2422 | goto out; | |
2423 | } | |
2424 | if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { | |
ddd1ea56 | 2425 | status = nfsd4_encode_group(xdr, rqstp, stat.gid); |
1da177e4 LT |
2426 | if (status) |
2427 | goto out; | |
2428 | } | |
2429 | if (bmval1 & FATTR4_WORD1_RAWDEV) { | |
ddd1ea56 BF |
2430 | p = xdr_reserve_space(xdr, 8); |
2431 | if (!p) | |
1da177e4 | 2432 | goto out_resource; |
c373b0a4 BF |
2433 | *p++ = cpu_to_be32((u32) MAJOR(stat.rdev)); |
2434 | *p++ = cpu_to_be32((u32) MINOR(stat.rdev)); | |
1da177e4 LT |
2435 | } |
2436 | if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { | |
ddd1ea56 BF |
2437 | p = xdr_reserve_space(xdr, 8); |
2438 | if (!p) | |
1da177e4 LT |
2439 | goto out_resource; |
2440 | dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; | |
b64c7f3b | 2441 | p = xdr_encode_hyper(p, dummy64); |
1da177e4 LT |
2442 | } |
2443 | if (bmval1 & FATTR4_WORD1_SPACE_FREE) { | |
ddd1ea56 BF |
2444 | p = xdr_reserve_space(xdr, 8); |
2445 | if (!p) | |
1da177e4 LT |
2446 | goto out_resource; |
2447 | dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; | |
b64c7f3b | 2448 | p = xdr_encode_hyper(p, dummy64); |
1da177e4 LT |
2449 | } |
2450 | if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { | |
ddd1ea56 BF |
2451 | p = xdr_reserve_space(xdr, 8); |
2452 | if (!p) | |
1da177e4 LT |
2453 | goto out_resource; |
2454 | dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; | |
b64c7f3b | 2455 | p = xdr_encode_hyper(p, dummy64); |
1da177e4 LT |
2456 | } |
2457 | if (bmval1 & FATTR4_WORD1_SPACE_USED) { | |
ddd1ea56 BF |
2458 | p = xdr_reserve_space(xdr, 8); |
2459 | if (!p) | |
1da177e4 LT |
2460 | goto out_resource; |
2461 | dummy64 = (u64)stat.blocks << 9; | |
b64c7f3b | 2462 | p = xdr_encode_hyper(p, dummy64); |
1da177e4 LT |
2463 | } |
2464 | if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { | |
ddd1ea56 BF |
2465 | p = xdr_reserve_space(xdr, 12); |
2466 | if (!p) | |
1da177e4 | 2467 | goto out_resource; |
b64c7f3b | 2468 | p = xdr_encode_hyper(p, (s64)stat.atime.tv_sec); |
c373b0a4 | 2469 | *p++ = cpu_to_be32(stat.atime.tv_nsec); |
1da177e4 LT |
2470 | } |
2471 | if (bmval1 & FATTR4_WORD1_TIME_DELTA) { | |
ddd1ea56 BF |
2472 | p = xdr_reserve_space(xdr, 12); |
2473 | if (!p) | |
1da177e4 | 2474 | goto out_resource; |
c373b0a4 BF |
2475 | *p++ = cpu_to_be32(0); |
2476 | *p++ = cpu_to_be32(1); | |
2477 | *p++ = cpu_to_be32(0); | |
1da177e4 LT |
2478 | } |
2479 | if (bmval1 & FATTR4_WORD1_TIME_METADATA) { | |
ddd1ea56 BF |
2480 | p = xdr_reserve_space(xdr, 12); |
2481 | if (!p) | |
1da177e4 | 2482 | goto out_resource; |
b64c7f3b | 2483 | p = xdr_encode_hyper(p, (s64)stat.ctime.tv_sec); |
c373b0a4 | 2484 | *p++ = cpu_to_be32(stat.ctime.tv_nsec); |
1da177e4 LT |
2485 | } |
2486 | if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { | |
ddd1ea56 BF |
2487 | p = xdr_reserve_space(xdr, 12); |
2488 | if (!p) | |
1da177e4 | 2489 | goto out_resource; |
b64c7f3b | 2490 | p = xdr_encode_hyper(p, (s64)stat.mtime.tv_sec); |
c373b0a4 | 2491 | *p++ = cpu_to_be32(stat.mtime.tv_nsec); |
1da177e4 LT |
2492 | } |
2493 | if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { | |
ddd1ea56 BF |
2494 | p = xdr_reserve_space(xdr, 8); |
2495 | if (!p) | |
1da177e4 | 2496 | goto out_resource; |
406a7ea9 FF |
2497 | /* |
2498 | * Get parent's attributes if not ignoring crossmount | |
2499 | * and this is the root of a cross-mounted filesystem. | |
2500 | */ | |
2501 | if (ignore_crossmnt == 0 && | |
ae7095a7 BF |
2502 | dentry == exp->ex_path.mnt->mnt_root) |
2503 | get_parent_attributes(exp, &stat); | |
b64c7f3b | 2504 | p = xdr_encode_hyper(p, stat.ino); |
1da177e4 | 2505 | } |
18032ca0 | 2506 | if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) { |
ddd1ea56 BF |
2507 | status = nfsd4_encode_security_label(xdr, rqstp, context, |
2508 | contextlen); | |
18032ca0 DQ |
2509 | if (status) |
2510 | goto out; | |
2511 | } | |
8c18f205 | 2512 | if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { |
ddd1ea56 BF |
2513 | p = xdr_reserve_space(xdr, 16); |
2514 | if (!p) | |
de3997a7 | 2515 | goto out_resource; |
c373b0a4 BF |
2516 | *p++ = cpu_to_be32(3); |
2517 | *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD0); | |
2518 | *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD1); | |
2519 | *p++ = cpu_to_be32(NFSD_SUPPATTR_EXCLCREAT_WORD2); | |
8c18f205 | 2520 | } |
7e705706 | 2521 | |
082d4bd7 BF |
2522 | attrlen = htonl(xdr->buf->len - attrlen_offset - 4); |
2523 | write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4); | |
1da177e4 LT |
2524 | status = nfs_ok; |
2525 | ||
2526 | out: | |
ba4e55bb | 2527 | #ifdef CONFIG_NFSD_V4_SECURITY_LABEL |
18032ca0 DQ |
2528 | if (context) |
2529 | security_release_secctx(context, contextlen); | |
ba4e55bb | 2530 | #endif /* CONFIG_NFSD_V4_SECURITY_LABEL */ |
28e05dd8 | 2531 | kfree(acl); |
18df11d0 | 2532 | if (tempfh) { |
d50e6136 | 2533 | fh_put(tempfh); |
18df11d0 YZ |
2534 | kfree(tempfh); |
2535 | } | |
1fcea5b2 BF |
2536 | if (status) |
2537 | xdr_truncate_encode(xdr, starting_len); | |
1da177e4 LT |
2538 | return status; |
2539 | out_nfserr: | |
b8dd7b9a | 2540 | status = nfserrno(err); |
1da177e4 LT |
2541 | goto out; |
2542 | out_resource: | |
1da177e4 LT |
2543 | status = nfserr_resource; |
2544 | goto out; | |
1da177e4 LT |
2545 | } |
2546 | ||
2825a7f9 BF |
2547 | static void svcxdr_init_encode_from_buffer(struct xdr_stream *xdr, |
2548 | struct xdr_buf *buf, __be32 *p, int bytes) | |
2549 | { | |
2550 | xdr->scratch.iov_len = 0; | |
2551 | memset(buf, 0, sizeof(struct xdr_buf)); | |
2552 | buf->head[0].iov_base = p; | |
2553 | buf->head[0].iov_len = 0; | |
2554 | buf->len = 0; | |
2555 | xdr->buf = buf; | |
2556 | xdr->iov = buf->head; | |
2557 | xdr->p = p; | |
2558 | xdr->end = (void *)p + bytes; | |
2559 | buf->buflen = bytes; | |
2560 | } | |
2561 | ||
d5184658 BF |
2562 | __be32 nfsd4_encode_fattr_to_buf(__be32 **p, int words, |
2563 | struct svc_fh *fhp, struct svc_export *exp, | |
2564 | struct dentry *dentry, u32 *bmval, | |
2565 | struct svc_rqst *rqstp, int ignore_crossmnt) | |
2566 | { | |
2825a7f9 | 2567 | struct xdr_buf dummy; |
d5184658 BF |
2568 | struct xdr_stream xdr; |
2569 | __be32 ret; | |
2570 | ||
2825a7f9 | 2571 | svcxdr_init_encode_from_buffer(&xdr, &dummy, *p, words << 2); |
d5184658 BF |
2572 | ret = nfsd4_encode_fattr(&xdr, fhp, exp, dentry, bmval, rqstp, |
2573 | ignore_crossmnt); | |
2574 | *p = xdr.p; | |
2575 | return ret; | |
2576 | } | |
2577 | ||
c0ce6ec8 BF |
2578 | static inline int attributes_need_mount(u32 *bmval) |
2579 | { | |
2580 | if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) | |
2581 | return 1; | |
2582 | if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) | |
2583 | return 1; | |
2584 | return 0; | |
2585 | } | |
2586 | ||
b37ad28b | 2587 | static __be32 |
561f0ed4 BF |
2588 | nfsd4_encode_dirent_fattr(struct xdr_stream *xdr, struct nfsd4_readdir *cd, |
2589 | const char *name, int namlen) | |
1da177e4 LT |
2590 | { |
2591 | struct svc_export *exp = cd->rd_fhp->fh_export; | |
2592 | struct dentry *dentry; | |
b37ad28b | 2593 | __be32 nfserr; |
406a7ea9 | 2594 | int ignore_crossmnt = 0; |
1da177e4 LT |
2595 | |
2596 | dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); | |
2597 | if (IS_ERR(dentry)) | |
2598 | return nfserrno(PTR_ERR(dentry)); | |
b2c0cea6 BF |
2599 | if (!dentry->d_inode) { |
2600 | /* | |
2601 | * nfsd_buffered_readdir drops the i_mutex between | |
2602 | * readdir and calling this callback, leaving a window | |
2603 | * where this directory entry could have gone away. | |
2604 | */ | |
2605 | dput(dentry); | |
2606 | return nfserr_noent; | |
2607 | } | |
1da177e4 LT |
2608 | |
2609 | exp_get(exp); | |
406a7ea9 FF |
2610 | /* |
2611 | * In the case of a mountpoint, the client may be asking for | |
2612 | * attributes that are only properties of the underlying filesystem | |
2613 | * as opposed to the cross-mounted file system. In such a case, | |
2614 | * we will not follow the cross mount and will fill the attribtutes | |
2615 | * directly from the mountpoint dentry. | |
2616 | */ | |
3227fa41 | 2617 | if (nfsd_mountpoint(dentry, exp)) { |
021d3a72 BF |
2618 | int err; |
2619 | ||
3227fa41 BF |
2620 | if (!(exp->ex_flags & NFSEXP_V4ROOT) |
2621 | && !attributes_need_mount(cd->rd_bmval)) { | |
2622 | ignore_crossmnt = 1; | |
2623 | goto out_encode; | |
2624 | } | |
dcb488a3 AA |
2625 | /* |
2626 | * Why the heck aren't we just using nfsd_lookup?? | |
2627 | * Different "."/".." handling? Something else? | |
2628 | * At least, add a comment here to explain.... | |
2629 | */ | |
021d3a72 BF |
2630 | err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); |
2631 | if (err) { | |
2632 | nfserr = nfserrno(err); | |
1da177e4 LT |
2633 | goto out_put; |
2634 | } | |
dcb488a3 AA |
2635 | nfserr = check_nfsd_access(exp, cd->rd_rqstp); |
2636 | if (nfserr) | |
2637 | goto out_put; | |
1da177e4 LT |
2638 | |
2639 | } | |
3227fa41 | 2640 | out_encode: |
561f0ed4 | 2641 | nfserr = nfsd4_encode_fattr(xdr, NULL, exp, dentry, cd->rd_bmval, |
406a7ea9 | 2642 | cd->rd_rqstp, ignore_crossmnt); |
1da177e4 LT |
2643 | out_put: |
2644 | dput(dentry); | |
2645 | exp_put(exp); | |
2646 | return nfserr; | |
2647 | } | |
2648 | ||
2ebbc012 | 2649 | static __be32 * |
561f0ed4 | 2650 | nfsd4_encode_rdattr_error(struct xdr_stream *xdr, __be32 nfserr) |
1da177e4 | 2651 | { |
561f0ed4 BF |
2652 | __be32 *p; |
2653 | ||
c3a45617 | 2654 | p = xdr_reserve_space(xdr, 20); |
561f0ed4 | 2655 | if (!p) |
1da177e4 LT |
2656 | return NULL; |
2657 | *p++ = htonl(2); | |
2658 | *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ | |
2659 | *p++ = htonl(0); /* bmval1 */ | |
2660 | ||
87915c64 | 2661 | *p++ = htonl(4); /* attribute length */ |
1da177e4 | 2662 | *p++ = nfserr; /* no htonl */ |
1da177e4 LT |
2663 | return p; |
2664 | } | |
2665 | ||
2666 | static int | |
a0ad13ef N |
2667 | nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, |
2668 | loff_t offset, u64 ino, unsigned int d_type) | |
1da177e4 | 2669 | { |
a0ad13ef | 2670 | struct readdir_cd *ccd = ccdv; |
1da177e4 | 2671 | struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); |
561f0ed4 BF |
2672 | struct xdr_stream *xdr = cd->xdr; |
2673 | int start_offset = xdr->buf->len; | |
2674 | int cookie_offset; | |
2675 | int entry_bytes; | |
b37ad28b | 2676 | __be32 nfserr = nfserr_toosmall; |
561f0ed4 BF |
2677 | __be64 wire_offset; |
2678 | __be32 *p; | |
1da177e4 LT |
2679 | |
2680 | /* In nfsv4, "." and ".." never make it onto the wire.. */ | |
2681 | if (name && isdotent(name, namlen)) { | |
2682 | cd->common.err = nfs_ok; | |
2683 | return 0; | |
2684 | } | |
2685 | ||
561f0ed4 BF |
2686 | if (cd->cookie_offset) { |
2687 | wire_offset = cpu_to_be64(offset); | |
2688 | write_bytes_to_xdr_buf(xdr->buf, cd->cookie_offset, | |
2689 | &wire_offset, 8); | |
2690 | } | |
1da177e4 | 2691 | |
561f0ed4 BF |
2692 | p = xdr_reserve_space(xdr, 4); |
2693 | if (!p) | |
1da177e4 | 2694 | goto fail; |
1da177e4 | 2695 | *p++ = xdr_one; /* mark entry present */ |
561f0ed4 BF |
2696 | cookie_offset = xdr->buf->len; |
2697 | p = xdr_reserve_space(xdr, 3*4 + namlen); | |
2698 | if (!p) | |
2699 | goto fail; | |
1da177e4 LT |
2700 | p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ |
2701 | p = xdr_encode_array(p, name, namlen); /* name length & name */ | |
2702 | ||
561f0ed4 | 2703 | nfserr = nfsd4_encode_dirent_fattr(xdr, cd, name, namlen); |
1da177e4 LT |
2704 | switch (nfserr) { |
2705 | case nfs_ok: | |
1da177e4 LT |
2706 | break; |
2707 | case nfserr_resource: | |
2708 | nfserr = nfserr_toosmall; | |
2709 | goto fail; | |
b2c0cea6 | 2710 | case nfserr_noent: |
f41c5ad2 | 2711 | xdr_truncate_encode(xdr, start_offset); |
b2c0cea6 | 2712 | goto skip_entry; |
1da177e4 LT |
2713 | default: |
2714 | /* | |
2715 | * If the client requested the RDATTR_ERROR attribute, | |
2716 | * we stuff the error code into this attribute | |
2717 | * and continue. If this attribute was not requested, | |
2718 | * then in accordance with the spec, we fail the | |
2719 | * entire READDIR operation(!) | |
2720 | */ | |
2721 | if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) | |
2722 | goto fail; | |
561f0ed4 | 2723 | p = nfsd4_encode_rdattr_error(xdr, nfserr); |
34081efc FI |
2724 | if (p == NULL) { |
2725 | nfserr = nfserr_toosmall; | |
1da177e4 | 2726 | goto fail; |
34081efc | 2727 | } |
1da177e4 | 2728 | } |
561f0ed4 BF |
2729 | nfserr = nfserr_toosmall; |
2730 | entry_bytes = xdr->buf->len - start_offset; | |
2731 | if (entry_bytes > cd->rd_maxcount) | |
2732 | goto fail; | |
2733 | cd->rd_maxcount -= entry_bytes; | |
3b299709 BF |
2734 | if (!cd->rd_dircount) |
2735 | goto fail; | |
2736 | cd->rd_dircount--; | |
561f0ed4 | 2737 | cd->cookie_offset = cookie_offset; |
b2c0cea6 | 2738 | skip_entry: |
1da177e4 LT |
2739 | cd->common.err = nfs_ok; |
2740 | return 0; | |
2741 | fail: | |
561f0ed4 | 2742 | xdr_truncate_encode(xdr, start_offset); |
1da177e4 LT |
2743 | cd->common.err = nfserr; |
2744 | return -EINVAL; | |
2745 | } | |
2746 | ||
d0a381dd BF |
2747 | static __be32 |
2748 | nfsd4_encode_stateid(struct xdr_stream *xdr, stateid_t *sid) | |
e2f282b9 | 2749 | { |
bc749ca4 | 2750 | __be32 *p; |
e2f282b9 | 2751 | |
d0a381dd BF |
2752 | p = xdr_reserve_space(xdr, sizeof(stateid_t)); |
2753 | if (!p) | |
2754 | return nfserr_resource; | |
c373b0a4 | 2755 | *p++ = cpu_to_be32(sid->si_generation); |
0c0c267b BF |
2756 | p = xdr_encode_opaque_fixed(p, &sid->si_opaque, |
2757 | sizeof(stateid_opaque_t)); | |
d0a381dd | 2758 | return 0; |
e2f282b9 BH |
2759 | } |
2760 | ||
695e12f8 | 2761 | static __be32 |
b37ad28b | 2762 | nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) |
1da177e4 | 2763 | { |
d0a381dd | 2764 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 2765 | __be32 *p; |
1da177e4 LT |
2766 | |
2767 | if (!nfserr) { | |
d0a381dd BF |
2768 | p = xdr_reserve_space(xdr, 8); |
2769 | if (!p) | |
2770 | return nfserr_resource; | |
c373b0a4 BF |
2771 | *p++ = cpu_to_be32(access->ac_supported); |
2772 | *p++ = cpu_to_be32(access->ac_resp_access); | |
1da177e4 | 2773 | } |
695e12f8 | 2774 | return nfserr; |
1da177e4 LT |
2775 | } |
2776 | ||
1d1bc8f2 BF |
2777 | static __be32 nfsd4_encode_bind_conn_to_session(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_bind_conn_to_session *bcts) |
2778 | { | |
d0a381dd | 2779 | struct xdr_stream *xdr = &resp->xdr; |
1d1bc8f2 BF |
2780 | __be32 *p; |
2781 | ||
2782 | if (!nfserr) { | |
d0a381dd BF |
2783 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 8); |
2784 | if (!p) | |
2785 | return nfserr_resource; | |
0c0c267b BF |
2786 | p = xdr_encode_opaque_fixed(p, bcts->sessionid.data, |
2787 | NFS4_MAX_SESSIONID_LEN); | |
c373b0a4 | 2788 | *p++ = cpu_to_be32(bcts->dir); |
6e67b5d1 | 2789 | /* Sorry, we do not yet support RDMA over 4.1: */ |
c373b0a4 | 2790 | *p++ = cpu_to_be32(0); |
1d1bc8f2 BF |
2791 | } |
2792 | return nfserr; | |
2793 | } | |
2794 | ||
695e12f8 | 2795 | static __be32 |
b37ad28b | 2796 | nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) |
1da177e4 | 2797 | { |
d0a381dd BF |
2798 | struct xdr_stream *xdr = &resp->xdr; |
2799 | ||
e2f282b9 | 2800 | if (!nfserr) |
d0a381dd | 2801 | nfserr = nfsd4_encode_stateid(xdr, &close->cl_stateid); |
e2f282b9 | 2802 | |
695e12f8 | 2803 | return nfserr; |
1da177e4 LT |
2804 | } |
2805 | ||
2806 | ||
695e12f8 | 2807 | static __be32 |
b37ad28b | 2808 | nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) |
1da177e4 | 2809 | { |
d0a381dd | 2810 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 2811 | __be32 *p; |
1da177e4 LT |
2812 | |
2813 | if (!nfserr) { | |
d0a381dd BF |
2814 | p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
2815 | if (!p) | |
2816 | return nfserr_resource; | |
0c0c267b BF |
2817 | p = xdr_encode_opaque_fixed(p, commit->co_verf.data, |
2818 | NFS4_VERIFIER_SIZE); | |
1da177e4 | 2819 | } |
695e12f8 | 2820 | return nfserr; |
1da177e4 LT |
2821 | } |
2822 | ||
695e12f8 | 2823 | static __be32 |
b37ad28b | 2824 | nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) |
1da177e4 | 2825 | { |
d0a381dd | 2826 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 2827 | __be32 *p; |
1da177e4 LT |
2828 | |
2829 | if (!nfserr) { | |
d0a381dd BF |
2830 | p = xdr_reserve_space(xdr, 32); |
2831 | if (!p) | |
2832 | return nfserr_resource; | |
d05d5744 | 2833 | p = encode_cinfo(p, &create->cr_cinfo); |
c373b0a4 BF |
2834 | *p++ = cpu_to_be32(2); |
2835 | *p++ = cpu_to_be32(create->cr_bmval[0]); | |
2836 | *p++ = cpu_to_be32(create->cr_bmval[1]); | |
1da177e4 | 2837 | } |
695e12f8 | 2838 | return nfserr; |
1da177e4 LT |
2839 | } |
2840 | ||
b37ad28b AV |
2841 | static __be32 |
2842 | nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) | |
1da177e4 LT |
2843 | { |
2844 | struct svc_fh *fhp = getattr->ga_fhp; | |
d5184658 | 2845 | struct xdr_stream *xdr = &resp->xdr; |
1da177e4 LT |
2846 | |
2847 | if (nfserr) | |
2848 | return nfserr; | |
2849 | ||
d5184658 BF |
2850 | nfserr = nfsd4_encode_fattr(xdr, fhp, fhp->fh_export, fhp->fh_dentry, |
2851 | getattr->ga_bmval, | |
406a7ea9 | 2852 | resp->rqstp, 0); |
1da177e4 LT |
2853 | return nfserr; |
2854 | } | |
2855 | ||
695e12f8 BH |
2856 | static __be32 |
2857 | nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) | |
1da177e4 | 2858 | { |
d0a381dd | 2859 | struct xdr_stream *xdr = &resp->xdr; |
695e12f8 | 2860 | struct svc_fh *fhp = *fhpp; |
1da177e4 | 2861 | unsigned int len; |
bc749ca4 | 2862 | __be32 *p; |
1da177e4 LT |
2863 | |
2864 | if (!nfserr) { | |
2865 | len = fhp->fh_handle.fh_size; | |
d0a381dd BF |
2866 | p = xdr_reserve_space(xdr, len + 4); |
2867 | if (!p) | |
2868 | return nfserr_resource; | |
0c0c267b | 2869 | p = xdr_encode_opaque(p, &fhp->fh_handle.fh_base, len); |
1da177e4 | 2870 | } |
695e12f8 | 2871 | return nfserr; |
1da177e4 LT |
2872 | } |
2873 | ||
2874 | /* | |
2875 | * Including all fields other than the name, a LOCK4denied structure requires | |
2876 | * 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. | |
2877 | */ | |
d0a381dd BF |
2878 | static __be32 |
2879 | nfsd4_encode_lock_denied(struct xdr_stream *xdr, struct nfsd4_lock_denied *ld) | |
1da177e4 | 2880 | { |
7c13f344 | 2881 | struct xdr_netobj *conf = &ld->ld_owner; |
bc749ca4 | 2882 | __be32 *p; |
1da177e4 | 2883 | |
8c7424cf | 2884 | again: |
d0a381dd | 2885 | p = xdr_reserve_space(xdr, 32 + XDR_LEN(conf->len)); |
8c7424cf BF |
2886 | if (!p) { |
2887 | /* | |
2888 | * Don't fail to return the result just because we can't | |
2889 | * return the conflicting open: | |
2890 | */ | |
2891 | if (conf->len) { | |
f98bac5a | 2892 | kfree(conf->data); |
8c7424cf BF |
2893 | conf->len = 0; |
2894 | conf->data = NULL; | |
2895 | goto again; | |
2896 | } | |
d0a381dd | 2897 | return nfserr_resource; |
8c7424cf | 2898 | } |
b64c7f3b BF |
2899 | p = xdr_encode_hyper(p, ld->ld_start); |
2900 | p = xdr_encode_hyper(p, ld->ld_length); | |
c373b0a4 | 2901 | *p++ = cpu_to_be32(ld->ld_type); |
7c13f344 | 2902 | if (conf->len) { |
0c0c267b BF |
2903 | p = xdr_encode_opaque_fixed(p, &ld->ld_clientid, 8); |
2904 | p = xdr_encode_opaque(p, conf->data, conf->len); | |
f98bac5a | 2905 | kfree(conf->data); |
1da177e4 | 2906 | } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ |
b64c7f3b | 2907 | p = xdr_encode_hyper(p, (u64)0); /* clientid */ |
c373b0a4 | 2908 | *p++ = cpu_to_be32(0); /* length of owner name */ |
1da177e4 | 2909 | } |
d0a381dd | 2910 | return nfserr_denied; |
1da177e4 LT |
2911 | } |
2912 | ||
695e12f8 | 2913 | static __be32 |
b37ad28b | 2914 | nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) |
1da177e4 | 2915 | { |
d0a381dd BF |
2916 | struct xdr_stream *xdr = &resp->xdr; |
2917 | ||
e2f282b9 | 2918 | if (!nfserr) |
d0a381dd | 2919 | nfserr = nfsd4_encode_stateid(xdr, &lock->lk_resp_stateid); |
e2f282b9 | 2920 | else if (nfserr == nfserr_denied) |
d0a381dd | 2921 | nfserr = nfsd4_encode_lock_denied(xdr, &lock->lk_denied); |
f98bac5a | 2922 | |
695e12f8 | 2923 | return nfserr; |
1da177e4 LT |
2924 | } |
2925 | ||
695e12f8 | 2926 | static __be32 |
b37ad28b | 2927 | nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) |
1da177e4 | 2928 | { |
d0a381dd BF |
2929 | struct xdr_stream *xdr = &resp->xdr; |
2930 | ||
1da177e4 | 2931 | if (nfserr == nfserr_denied) |
d0a381dd | 2932 | nfsd4_encode_lock_denied(xdr, &lockt->lt_denied); |
695e12f8 | 2933 | return nfserr; |
1da177e4 LT |
2934 | } |
2935 | ||
695e12f8 | 2936 | static __be32 |
b37ad28b | 2937 | nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) |
1da177e4 | 2938 | { |
d0a381dd BF |
2939 | struct xdr_stream *xdr = &resp->xdr; |
2940 | ||
e2f282b9 | 2941 | if (!nfserr) |
d0a381dd | 2942 | nfserr = nfsd4_encode_stateid(xdr, &locku->lu_stateid); |
e2f282b9 | 2943 | |
695e12f8 | 2944 | return nfserr; |
1da177e4 LT |
2945 | } |
2946 | ||
2947 | ||
695e12f8 | 2948 | static __be32 |
b37ad28b | 2949 | nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) |
1da177e4 | 2950 | { |
d0a381dd | 2951 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 2952 | __be32 *p; |
1da177e4 LT |
2953 | |
2954 | if (!nfserr) { | |
d0a381dd BF |
2955 | p = xdr_reserve_space(xdr, 20); |
2956 | if (!p) | |
2957 | return nfserr_resource; | |
d05d5744 | 2958 | p = encode_cinfo(p, &link->li_cinfo); |
1da177e4 | 2959 | } |
695e12f8 | 2960 | return nfserr; |
1da177e4 LT |
2961 | } |
2962 | ||
2963 | ||
695e12f8 | 2964 | static __be32 |
b37ad28b | 2965 | nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) |
1da177e4 | 2966 | { |
d0a381dd | 2967 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 2968 | __be32 *p; |
1da177e4 LT |
2969 | |
2970 | if (nfserr) | |
2971 | goto out; | |
2972 | ||
d0a381dd BF |
2973 | nfserr = nfsd4_encode_stateid(xdr, &open->op_stateid); |
2974 | if (nfserr) | |
2975 | goto out; | |
2976 | p = xdr_reserve_space(xdr, 40); | |
2977 | if (!p) | |
2978 | return nfserr_resource; | |
d05d5744 | 2979 | p = encode_cinfo(p, &open->op_cinfo); |
c373b0a4 BF |
2980 | *p++ = cpu_to_be32(open->op_rflags); |
2981 | *p++ = cpu_to_be32(2); | |
2982 | *p++ = cpu_to_be32(open->op_bmval[0]); | |
2983 | *p++ = cpu_to_be32(open->op_bmval[1]); | |
2984 | *p++ = cpu_to_be32(open->op_delegate_type); | |
1da177e4 LT |
2985 | |
2986 | switch (open->op_delegate_type) { | |
2987 | case NFS4_OPEN_DELEGATE_NONE: | |
2988 | break; | |
2989 | case NFS4_OPEN_DELEGATE_READ: | |
d0a381dd BF |
2990 | nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
2991 | if (nfserr) | |
2992 | return nfserr; | |
2993 | p = xdr_reserve_space(xdr, 20); | |
2994 | if (!p) | |
2995 | return nfserr_resource; | |
c373b0a4 | 2996 | *p++ = cpu_to_be32(open->op_recall); |
1da177e4 LT |
2997 | |
2998 | /* | |
2999 | * TODO: ACE's in delegations | |
3000 | */ | |
c373b0a4 BF |
3001 | *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
3002 | *p++ = cpu_to_be32(0); | |
3003 | *p++ = cpu_to_be32(0); | |
3004 | *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ | |
1da177e4 LT |
3005 | break; |
3006 | case NFS4_OPEN_DELEGATE_WRITE: | |
d0a381dd BF |
3007 | nfserr = nfsd4_encode_stateid(xdr, &open->op_delegate_stateid); |
3008 | if (nfserr) | |
3009 | return nfserr; | |
3010 | p = xdr_reserve_space(xdr, 32); | |
3011 | if (!p) | |
3012 | return nfserr_resource; | |
c373b0a4 | 3013 | *p++ = cpu_to_be32(0); |
1da177e4 LT |
3014 | |
3015 | /* | |
3016 | * TODO: space_limit's in delegations | |
3017 | */ | |
c373b0a4 BF |
3018 | *p++ = cpu_to_be32(NFS4_LIMIT_SIZE); |
3019 | *p++ = cpu_to_be32(~(u32)0); | |
3020 | *p++ = cpu_to_be32(~(u32)0); | |
1da177e4 LT |
3021 | |
3022 | /* | |
3023 | * TODO: ACE's in delegations | |
3024 | */ | |
c373b0a4 BF |
3025 | *p++ = cpu_to_be32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); |
3026 | *p++ = cpu_to_be32(0); | |
3027 | *p++ = cpu_to_be32(0); | |
3028 | *p++ = cpu_to_be32(0); /* XXX: is NULL principal ok? */ | |
1da177e4 | 3029 | break; |
d24433cd BH |
3030 | case NFS4_OPEN_DELEGATE_NONE_EXT: /* 4.1 */ |
3031 | switch (open->op_why_no_deleg) { | |
3032 | case WND4_CONTENTION: | |
3033 | case WND4_RESOURCE: | |
d0a381dd BF |
3034 | p = xdr_reserve_space(xdr, 8); |
3035 | if (!p) | |
3036 | return nfserr_resource; | |
c373b0a4 BF |
3037 | *p++ = cpu_to_be32(open->op_why_no_deleg); |
3038 | /* deleg signaling not supported yet: */ | |
3039 | *p++ = cpu_to_be32(0); | |
d24433cd BH |
3040 | break; |
3041 | default: | |
d0a381dd BF |
3042 | p = xdr_reserve_space(xdr, 4); |
3043 | if (!p) | |
3044 | return nfserr_resource; | |
c373b0a4 | 3045 | *p++ = cpu_to_be32(open->op_why_no_deleg); |
d24433cd | 3046 | } |
d24433cd | 3047 | break; |
1da177e4 LT |
3048 | default: |
3049 | BUG(); | |
3050 | } | |
3051 | /* XXX save filehandle here */ | |
3052 | out: | |
695e12f8 | 3053 | return nfserr; |
1da177e4 LT |
3054 | } |
3055 | ||
695e12f8 | 3056 | static __be32 |
b37ad28b | 3057 | nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) |
1da177e4 | 3058 | { |
d0a381dd BF |
3059 | struct xdr_stream *xdr = &resp->xdr; |
3060 | ||
e2f282b9 | 3061 | if (!nfserr) |
d0a381dd | 3062 | nfserr = nfsd4_encode_stateid(xdr, &oc->oc_resp_stateid); |
1da177e4 | 3063 | |
695e12f8 | 3064 | return nfserr; |
1da177e4 LT |
3065 | } |
3066 | ||
695e12f8 | 3067 | static __be32 |
b37ad28b | 3068 | nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) |
1da177e4 | 3069 | { |
d0a381dd BF |
3070 | struct xdr_stream *xdr = &resp->xdr; |
3071 | ||
e2f282b9 | 3072 | if (!nfserr) |
d0a381dd | 3073 | nfserr = nfsd4_encode_stateid(xdr, &od->od_stateid); |
1da177e4 | 3074 | |
695e12f8 | 3075 | return nfserr; |
1da177e4 LT |
3076 | } |
3077 | ||
dc97618d BF |
3078 | static __be32 nfsd4_encode_splice_read( |
3079 | struct nfsd4_compoundres *resp, | |
3080 | struct nfsd4_read *read, | |
3081 | struct file *file, unsigned long maxcount) | |
1da177e4 | 3082 | { |
ddd1ea56 | 3083 | struct xdr_stream *xdr = &resp->xdr; |
34a78b48 | 3084 | struct xdr_buf *buf = xdr->buf; |
dc97618d | 3085 | u32 eof; |
30596768 | 3086 | int space_left; |
dc97618d | 3087 | __be32 nfserr; |
fec25fa4 | 3088 | __be32 *p = xdr->p - 2; |
1da177e4 | 3089 | |
d5d5c304 KM |
3090 | /* Make sure there will be room for padding if needed */ |
3091 | if (xdr->end - xdr->p < 1) | |
d0a381dd | 3092 | return nfserr_resource; |
dc97618d BF |
3093 | |
3094 | nfserr = nfsd_splice_read(read->rd_rqstp, file, | |
3095 | read->rd_offset, &maxcount); | |
3096 | if (nfserr) { | |
3097 | /* | |
3098 | * nfsd_splice_actor may have already messed with the | |
3099 | * page length; reset it so as not to confuse | |
3100 | * xdr_truncate_encode: | |
3101 | */ | |
34a78b48 | 3102 | buf->page_len = 0; |
dc97618d | 3103 | return nfserr; |
b0e35fda | 3104 | } |
1da177e4 | 3105 | |
dc97618d BF |
3106 | eof = (read->rd_offset + maxcount >= |
3107 | read->rd_fhp->fh_dentry->d_inode->i_size); | |
4e21ac4b | 3108 | |
fec25fa4 BF |
3109 | *(p++) = htonl(eof); |
3110 | *(p++) = htonl(maxcount); | |
dc97618d | 3111 | |
34a78b48 BF |
3112 | buf->page_len = maxcount; |
3113 | buf->len += maxcount; | |
dc97618d | 3114 | xdr->page_ptr += (maxcount + PAGE_SIZE - 1) / PAGE_SIZE; |
dc97618d BF |
3115 | |
3116 | /* Use rest of head for padding and remaining ops: */ | |
34a78b48 BF |
3117 | buf->tail[0].iov_base = xdr->p; |
3118 | buf->tail[0].iov_len = 0; | |
fec25fa4 | 3119 | xdr->iov = buf->tail; |
dc97618d | 3120 | if (maxcount&3) { |
fec25fa4 BF |
3121 | int pad = 4 - (maxcount&3); |
3122 | ||
3123 | *(xdr->p++) = 0; | |
3124 | ||
34a78b48 | 3125 | buf->tail[0].iov_base += maxcount&3; |
fec25fa4 BF |
3126 | buf->tail[0].iov_len = pad; |
3127 | buf->len += pad; | |
b0e35fda | 3128 | } |
2825a7f9 | 3129 | |
dc97618d | 3130 | space_left = min_t(int, (void *)xdr->end - (void *)xdr->p, |
34a78b48 BF |
3131 | buf->buflen - buf->len); |
3132 | buf->buflen = buf->len + space_left; | |
dc97618d BF |
3133 | xdr->end = (__be32 *)((void *)xdr->end + space_left); |
3134 | ||
3135 | return 0; | |
3136 | } | |
3137 | ||
3138 | static __be32 nfsd4_encode_readv(struct nfsd4_compoundres *resp, | |
3139 | struct nfsd4_read *read, | |
3140 | struct file *file, unsigned long maxcount) | |
3141 | { | |
3142 | struct xdr_stream *xdr = &resp->xdr; | |
3143 | u32 eof; | |
3144 | int v; | |
dc97618d | 3145 | int starting_len = xdr->buf->len - 8; |
dc97618d | 3146 | long len; |
b0420980 | 3147 | int thislen; |
dc97618d BF |
3148 | __be32 nfserr; |
3149 | __be32 tmp; | |
3150 | __be32 *p; | |
b0420980 BF |
3151 | u32 zzz = 0; |
3152 | int pad; | |
1da177e4 LT |
3153 | |
3154 | len = maxcount; | |
3155 | v = 0; | |
6ff9897d | 3156 | |
1055414f | 3157 | thislen = min_t(long, len, ((void *)xdr->end - (void *)xdr->p)); |
b0420980 BF |
3158 | p = xdr_reserve_space(xdr, (thislen+3)&~3); |
3159 | WARN_ON_ONCE(!p); | |
3160 | resp->rqstp->rq_vec[v].iov_base = p; | |
3161 | resp->rqstp->rq_vec[v].iov_len = thislen; | |
3162 | v++; | |
3163 | len -= thislen; | |
3164 | ||
3165 | while (len) { | |
6ff9897d | 3166 | thislen = min_t(long, len, PAGE_SIZE); |
b0420980 BF |
3167 | p = xdr_reserve_space(xdr, (thislen+3)&~3); |
3168 | WARN_ON_ONCE(!p); | |
3169 | resp->rqstp->rq_vec[v].iov_base = p; | |
6ff9897d | 3170 | resp->rqstp->rq_vec[v].iov_len = thislen; |
1da177e4 | 3171 | v++; |
6ff9897d | 3172 | len -= thislen; |
1da177e4 LT |
3173 | } |
3174 | read->rd_vlen = v; | |
3175 | ||
dc97618d BF |
3176 | nfserr = nfsd_readv(file, read->rd_offset, resp->rqstp->rq_vec, |
3177 | read->rd_vlen, &maxcount); | |
3178 | if (nfserr) | |
1da177e4 | 3179 | return nfserr; |
b0420980 | 3180 | xdr_truncate_encode(xdr, starting_len + 8 + ((maxcount+3)&~3)); |
dc97618d | 3181 | |
44524359 N |
3182 | eof = (read->rd_offset + maxcount >= |
3183 | read->rd_fhp->fh_dentry->d_inode->i_size); | |
1da177e4 | 3184 | |
dc97618d BF |
3185 | tmp = htonl(eof); |
3186 | write_bytes_to_xdr_buf(xdr->buf, starting_len , &tmp, 4); | |
3187 | tmp = htonl(maxcount); | |
3188 | write_bytes_to_xdr_buf(xdr->buf, starting_len + 4, &tmp, 4); | |
3189 | ||
b0420980 BF |
3190 | pad = (maxcount&3) ? 4 - (maxcount&3) : 0; |
3191 | write_bytes_to_xdr_buf(xdr->buf, starting_len + 8 + maxcount, | |
3192 | &zzz, pad); | |
1da177e4 | 3193 | return 0; |
dc97618d BF |
3194 | |
3195 | } | |
3196 | ||
3197 | static __be32 | |
3198 | nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, | |
3199 | struct nfsd4_read *read) | |
3200 | { | |
3201 | unsigned long maxcount; | |
3202 | struct xdr_stream *xdr = &resp->xdr; | |
3203 | struct file *file = read->rd_filp; | |
3204 | int starting_len = xdr->buf->len; | |
3205 | struct raparms *ra; | |
3206 | __be32 *p; | |
3207 | __be32 err; | |
3208 | ||
3209 | if (nfserr) | |
3210 | return nfserr; | |
3211 | ||
3212 | p = xdr_reserve_space(xdr, 8); /* eof flag and byte count */ | |
3213 | if (!p) { | |
3214 | WARN_ON_ONCE(resp->rqstp->rq_splice_ok); | |
3215 | return nfserr_resource; | |
3216 | } | |
b0420980 BF |
3217 | if (resp->xdr.buf->page_len && resp->rqstp->rq_splice_ok) { |
3218 | WARN_ON_ONCE(1); | |
dc97618d BF |
3219 | return nfserr_resource; |
3220 | } | |
dc97618d BF |
3221 | xdr_commit_encode(xdr); |
3222 | ||
3223 | maxcount = svc_max_payload(resp->rqstp); | |
3c7aa15d KM |
3224 | maxcount = min_t(unsigned long, maxcount, (xdr->buf->buflen - xdr->buf->len)); |
3225 | maxcount = min_t(unsigned long, maxcount, read->rd_length); | |
dc97618d BF |
3226 | |
3227 | if (!read->rd_filp) { | |
3228 | err = nfsd_get_tmp_read_open(resp->rqstp, read->rd_fhp, | |
3229 | &file, &ra); | |
3230 | if (err) | |
3231 | goto err_truncate; | |
3232 | } | |
3233 | ||
3234 | if (file->f_op->splice_read && resp->rqstp->rq_splice_ok) | |
3235 | err = nfsd4_encode_splice_read(resp, read, file, maxcount); | |
3236 | else | |
3237 | err = nfsd4_encode_readv(resp, read, file, maxcount); | |
3238 | ||
3239 | if (!read->rd_filp) | |
3240 | nfsd_put_tmp_read_open(file, ra); | |
3241 | ||
3242 | err_truncate: | |
3243 | if (err) | |
3244 | xdr_truncate_encode(xdr, starting_len); | |
3245 | return err; | |
1da177e4 LT |
3246 | } |
3247 | ||
b37ad28b AV |
3248 | static __be32 |
3249 | nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) | |
1da177e4 LT |
3250 | { |
3251 | int maxcount; | |
476a7b1f BF |
3252 | __be32 wire_count; |
3253 | int zero = 0; | |
ddd1ea56 | 3254 | struct xdr_stream *xdr = &resp->xdr; |
1fcea5b2 | 3255 | int length_offset = xdr->buf->len; |
bc749ca4 | 3256 | __be32 *p; |
1da177e4 LT |
3257 | |
3258 | if (nfserr) | |
3259 | return nfserr; | |
2825a7f9 BF |
3260 | |
3261 | p = xdr_reserve_space(xdr, 4); | |
3262 | if (!p) | |
3263 | return nfserr_resource; | |
1da177e4 | 3264 | maxcount = PAGE_SIZE; |
d0a381dd | 3265 | |
476a7b1f BF |
3266 | p = xdr_reserve_space(xdr, maxcount); |
3267 | if (!p) | |
4e21ac4b | 3268 | return nfserr_resource; |
1da177e4 LT |
3269 | /* |
3270 | * XXX: By default, the ->readlink() VFS op will truncate symlinks | |
3271 | * if they would overflow the buffer. Is this kosher in NFSv4? If | |
3272 | * not, one easy fix is: if ->readlink() precisely fills the buffer, | |
3273 | * assume that truncation occurred, and return NFS4ERR_RESOURCE. | |
3274 | */ | |
476a7b1f BF |
3275 | nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, |
3276 | (char *)p, &maxcount); | |
1da177e4 | 3277 | if (nfserr == nfserr_isdir) |
d3f627c8 BF |
3278 | nfserr = nfserr_inval; |
3279 | if (nfserr) { | |
1fcea5b2 | 3280 | xdr_truncate_encode(xdr, length_offset); |
1da177e4 | 3281 | return nfserr; |
d3f627c8 | 3282 | } |
1da177e4 | 3283 | |
476a7b1f BF |
3284 | wire_count = htonl(maxcount); |
3285 | write_bytes_to_xdr_buf(xdr->buf, length_offset, &wire_count, 4); | |
69bbd9c7 | 3286 | xdr_truncate_encode(xdr, length_offset + 4 + ALIGN(maxcount, 4)); |
476a7b1f BF |
3287 | if (maxcount & 3) |
3288 | write_bytes_to_xdr_buf(xdr->buf, length_offset + 4 + maxcount, | |
3289 | &zero, 4 - (maxcount&3)); | |
1da177e4 LT |
3290 | return 0; |
3291 | } | |
3292 | ||
b37ad28b AV |
3293 | static __be32 |
3294 | nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) | |
1da177e4 LT |
3295 | { |
3296 | int maxcount; | |
561f0ed4 | 3297 | int bytes_left; |
1da177e4 | 3298 | loff_t offset; |
561f0ed4 | 3299 | __be64 wire_offset; |
ddd1ea56 | 3300 | struct xdr_stream *xdr = &resp->xdr; |
1fcea5b2 | 3301 | int starting_len = xdr->buf->len; |
bc749ca4 | 3302 | __be32 *p; |
1da177e4 LT |
3303 | |
3304 | if (nfserr) | |
3305 | return nfserr; | |
1da177e4 | 3306 | |
d0a381dd BF |
3307 | p = xdr_reserve_space(xdr, NFS4_VERIFIER_SIZE); |
3308 | if (!p) | |
3309 | return nfserr_resource; | |
1da177e4 LT |
3310 | |
3311 | /* XXX: Following NFSv3, we ignore the READDIR verifier for now. */ | |
c373b0a4 BF |
3312 | *p++ = cpu_to_be32(0); |
3313 | *p++ = cpu_to_be32(0); | |
4aea24b2 BF |
3314 | resp->xdr.buf->head[0].iov_len = ((char *)resp->xdr.p) |
3315 | - (char *)resp->xdr.buf->head[0].iov_base; | |
1da177e4 LT |
3316 | |
3317 | /* | |
561f0ed4 BF |
3318 | * Number of bytes left for directory entries allowing for the |
3319 | * final 8 bytes of the readdir and a following failed op: | |
3320 | */ | |
3321 | bytes_left = xdr->buf->buflen - xdr->buf->len | |
3322 | - COMPOUND_ERR_SLACK_SPACE - 8; | |
3323 | if (bytes_left < 0) { | |
3324 | nfserr = nfserr_resource; | |
3325 | goto err_no_verf; | |
3326 | } | |
3327 | maxcount = min_t(u32, readdir->rd_maxcount, INT_MAX); | |
3328 | /* | |
3329 | * Note the rfc defines rd_maxcount as the size of the | |
3330 | * READDIR4resok structure, which includes the verifier above | |
3331 | * and the 8 bytes encoded at the end of this function: | |
1da177e4 | 3332 | */ |
561f0ed4 BF |
3333 | if (maxcount < 16) { |
3334 | nfserr = nfserr_toosmall; | |
1da177e4 LT |
3335 | goto err_no_verf; |
3336 | } | |
561f0ed4 | 3337 | maxcount = min_t(int, maxcount-16, bytes_left); |
1da177e4 | 3338 | |
561f0ed4 BF |
3339 | readdir->xdr = xdr; |
3340 | readdir->rd_maxcount = maxcount; | |
1da177e4 | 3341 | readdir->common.err = 0; |
561f0ed4 | 3342 | readdir->cookie_offset = 0; |
1da177e4 LT |
3343 | |
3344 | offset = readdir->rd_cookie; | |
3345 | nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, | |
3346 | &offset, | |
3347 | &readdir->common, nfsd4_encode_dirent); | |
3348 | if (nfserr == nfs_ok && | |
3349 | readdir->common.err == nfserr_toosmall && | |
561f0ed4 BF |
3350 | xdr->buf->len == starting_len + 8) { |
3351 | /* nothing encoded; which limit did we hit?: */ | |
3352 | if (maxcount - 16 < bytes_left) | |
3353 | /* It was the fault of rd_maxcount: */ | |
3354 | nfserr = nfserr_toosmall; | |
3355 | else | |
3356 | /* We ran out of buffer space: */ | |
3357 | nfserr = nfserr_resource; | |
3358 | } | |
1da177e4 LT |
3359 | if (nfserr) |
3360 | goto err_no_verf; | |
3361 | ||
561f0ed4 BF |
3362 | if (readdir->cookie_offset) { |
3363 | wire_offset = cpu_to_be64(offset); | |
3364 | write_bytes_to_xdr_buf(xdr->buf, readdir->cookie_offset, | |
3365 | &wire_offset, 8); | |
3366 | } | |
1da177e4 | 3367 | |
561f0ed4 BF |
3368 | p = xdr_reserve_space(xdr, 8); |
3369 | if (!p) { | |
3370 | WARN_ON_ONCE(1); | |
3371 | goto err_no_verf; | |
3372 | } | |
1da177e4 LT |
3373 | *p++ = 0; /* no more entries */ |
3374 | *p++ = htonl(readdir->common.err == nfserr_eof); | |
1da177e4 LT |
3375 | |
3376 | return 0; | |
3377 | err_no_verf: | |
1fcea5b2 | 3378 | xdr_truncate_encode(xdr, starting_len); |
1da177e4 LT |
3379 | return nfserr; |
3380 | } | |
3381 | ||
695e12f8 | 3382 | static __be32 |
b37ad28b | 3383 | nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) |
1da177e4 | 3384 | { |
d0a381dd | 3385 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3386 | __be32 *p; |
1da177e4 LT |
3387 | |
3388 | if (!nfserr) { | |
d0a381dd BF |
3389 | p = xdr_reserve_space(xdr, 20); |
3390 | if (!p) | |
3391 | return nfserr_resource; | |
d05d5744 | 3392 | p = encode_cinfo(p, &remove->rm_cinfo); |
1da177e4 | 3393 | } |
695e12f8 | 3394 | return nfserr; |
1da177e4 LT |
3395 | } |
3396 | ||
695e12f8 | 3397 | static __be32 |
b37ad28b | 3398 | nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) |
1da177e4 | 3399 | { |
d0a381dd | 3400 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3401 | __be32 *p; |
1da177e4 LT |
3402 | |
3403 | if (!nfserr) { | |
d0a381dd BF |
3404 | p = xdr_reserve_space(xdr, 40); |
3405 | if (!p) | |
3406 | return nfserr_resource; | |
d05d5744 BF |
3407 | p = encode_cinfo(p, &rename->rn_sinfo); |
3408 | p = encode_cinfo(p, &rename->rn_tinfo); | |
1da177e4 | 3409 | } |
695e12f8 | 3410 | return nfserr; |
1da177e4 LT |
3411 | } |
3412 | ||
695e12f8 | 3413 | static __be32 |
d0a381dd | 3414 | nfsd4_do_encode_secinfo(struct xdr_stream *xdr, |
a77c806f | 3415 | __be32 nfserr, struct svc_export *exp) |
dcb488a3 | 3416 | { |
676e4ebd | 3417 | u32 i, nflavs, supported; |
4796f457 BF |
3418 | struct exp_flavor_info *flavs; |
3419 | struct exp_flavor_info def_flavs[2]; | |
676e4ebd CL |
3420 | __be32 *p, *flavorsp; |
3421 | static bool report = true; | |
dcb488a3 AA |
3422 | |
3423 | if (nfserr) | |
3424 | goto out; | |
d0a381dd | 3425 | nfserr = nfserr_resource; |
4796f457 BF |
3426 | if (exp->ex_nflavors) { |
3427 | flavs = exp->ex_flavors; | |
3428 | nflavs = exp->ex_nflavors; | |
3429 | } else { /* Handling of some defaults in absence of real secinfo: */ | |
3430 | flavs = def_flavs; | |
3431 | if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { | |
3432 | nflavs = 2; | |
3433 | flavs[0].pseudoflavor = RPC_AUTH_UNIX; | |
3434 | flavs[1].pseudoflavor = RPC_AUTH_NULL; | |
3435 | } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { | |
3436 | nflavs = 1; | |
3437 | flavs[0].pseudoflavor | |
3438 | = svcauth_gss_flavor(exp->ex_client); | |
3439 | } else { | |
3440 | nflavs = 1; | |
3441 | flavs[0].pseudoflavor | |
3442 | = exp->ex_client->flavour->flavour; | |
3443 | } | |
3444 | } | |
3445 | ||
676e4ebd | 3446 | supported = 0; |
d0a381dd BF |
3447 | p = xdr_reserve_space(xdr, 4); |
3448 | if (!p) | |
3449 | goto out; | |
676e4ebd | 3450 | flavorsp = p++; /* to be backfilled later */ |
676e4ebd | 3451 | |
4796f457 | 3452 | for (i = 0; i < nflavs; i++) { |
676e4ebd | 3453 | rpc_authflavor_t pf = flavs[i].pseudoflavor; |
a77c806f | 3454 | struct rpcsec_gss_info info; |
dcb488a3 | 3455 | |
676e4ebd CL |
3456 | if (rpcauth_get_gssinfo(pf, &info) == 0) { |
3457 | supported++; | |
d0a381dd BF |
3458 | p = xdr_reserve_space(xdr, 4 + 4 + |
3459 | XDR_LEN(info.oid.len) + 4 + 4); | |
3460 | if (!p) | |
3461 | goto out; | |
c373b0a4 | 3462 | *p++ = cpu_to_be32(RPC_AUTH_GSS); |
0c0c267b | 3463 | p = xdr_encode_opaque(p, info.oid.data, info.oid.len); |
c373b0a4 BF |
3464 | *p++ = cpu_to_be32(info.qop); |
3465 | *p++ = cpu_to_be32(info.service); | |
676e4ebd CL |
3466 | } else if (pf < RPC_AUTH_MAXFLAVOR) { |
3467 | supported++; | |
d0a381dd BF |
3468 | p = xdr_reserve_space(xdr, 4); |
3469 | if (!p) | |
3470 | goto out; | |
c373b0a4 | 3471 | *p++ = cpu_to_be32(pf); |
676e4ebd CL |
3472 | } else { |
3473 | if (report) | |
3474 | pr_warn("NFS: SECINFO: security flavor %u " | |
3475 | "is not supported\n", pf); | |
dcb488a3 AA |
3476 | } |
3477 | } | |
a77c806f | 3478 | |
676e4ebd CL |
3479 | if (nflavs != supported) |
3480 | report = false; | |
3481 | *flavorsp = htonl(supported); | |
d0a381dd | 3482 | nfserr = 0; |
dcb488a3 AA |
3483 | out: |
3484 | if (exp) | |
3485 | exp_put(exp); | |
695e12f8 | 3486 | return nfserr; |
dcb488a3 AA |
3487 | } |
3488 | ||
22b6dee8 MJ |
3489 | static __be32 |
3490 | nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, | |
3491 | struct nfsd4_secinfo *secinfo) | |
3492 | { | |
d0a381dd BF |
3493 | struct xdr_stream *xdr = &resp->xdr; |
3494 | ||
3495 | return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->si_exp); | |
22b6dee8 MJ |
3496 | } |
3497 | ||
3498 | static __be32 | |
3499 | nfsd4_encode_secinfo_no_name(struct nfsd4_compoundres *resp, __be32 nfserr, | |
3500 | struct nfsd4_secinfo_no_name *secinfo) | |
3501 | { | |
d0a381dd BF |
3502 | struct xdr_stream *xdr = &resp->xdr; |
3503 | ||
3504 | return nfsd4_do_encode_secinfo(xdr, nfserr, secinfo->sin_exp); | |
22b6dee8 MJ |
3505 | } |
3506 | ||
1da177e4 LT |
3507 | /* |
3508 | * The SETATTR encode routine is special -- it always encodes a bitmap, | |
3509 | * regardless of the error status. | |
3510 | */ | |
695e12f8 | 3511 | static __be32 |
b37ad28b | 3512 | nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) |
1da177e4 | 3513 | { |
d0a381dd | 3514 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3515 | __be32 *p; |
1da177e4 | 3516 | |
d0a381dd BF |
3517 | p = xdr_reserve_space(xdr, 16); |
3518 | if (!p) | |
3519 | return nfserr_resource; | |
1da177e4 | 3520 | if (nfserr) { |
c373b0a4 BF |
3521 | *p++ = cpu_to_be32(3); |
3522 | *p++ = cpu_to_be32(0); | |
3523 | *p++ = cpu_to_be32(0); | |
3524 | *p++ = cpu_to_be32(0); | |
1da177e4 LT |
3525 | } |
3526 | else { | |
c373b0a4 BF |
3527 | *p++ = cpu_to_be32(3); |
3528 | *p++ = cpu_to_be32(setattr->sa_bmval[0]); | |
3529 | *p++ = cpu_to_be32(setattr->sa_bmval[1]); | |
3530 | *p++ = cpu_to_be32(setattr->sa_bmval[2]); | |
1da177e4 | 3531 | } |
695e12f8 | 3532 | return nfserr; |
1da177e4 LT |
3533 | } |
3534 | ||
695e12f8 | 3535 | static __be32 |
b37ad28b | 3536 | nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) |
1da177e4 | 3537 | { |
d0a381dd | 3538 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3539 | __be32 *p; |
1da177e4 LT |
3540 | |
3541 | if (!nfserr) { | |
d0a381dd BF |
3542 | p = xdr_reserve_space(xdr, 8 + NFS4_VERIFIER_SIZE); |
3543 | if (!p) | |
3544 | return nfserr_resource; | |
0c0c267b BF |
3545 | p = xdr_encode_opaque_fixed(p, &scd->se_clientid, 8); |
3546 | p = xdr_encode_opaque_fixed(p, &scd->se_confirm, | |
3547 | NFS4_VERIFIER_SIZE); | |
1da177e4 LT |
3548 | } |
3549 | else if (nfserr == nfserr_clid_inuse) { | |
d0a381dd BF |
3550 | p = xdr_reserve_space(xdr, 8); |
3551 | if (!p) | |
3552 | return nfserr_resource; | |
c373b0a4 BF |
3553 | *p++ = cpu_to_be32(0); |
3554 | *p++ = cpu_to_be32(0); | |
1da177e4 | 3555 | } |
695e12f8 | 3556 | return nfserr; |
1da177e4 LT |
3557 | } |
3558 | ||
695e12f8 | 3559 | static __be32 |
b37ad28b | 3560 | nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) |
1da177e4 | 3561 | { |
d0a381dd | 3562 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3563 | __be32 *p; |
1da177e4 LT |
3564 | |
3565 | if (!nfserr) { | |
d0a381dd BF |
3566 | p = xdr_reserve_space(xdr, 16); |
3567 | if (!p) | |
3568 | return nfserr_resource; | |
c373b0a4 BF |
3569 | *p++ = cpu_to_be32(write->wr_bytes_written); |
3570 | *p++ = cpu_to_be32(write->wr_how_written); | |
0c0c267b BF |
3571 | p = xdr_encode_opaque_fixed(p, write->wr_verifier.data, |
3572 | NFS4_VERIFIER_SIZE); | |
1da177e4 | 3573 | } |
695e12f8 | 3574 | return nfserr; |
1da177e4 LT |
3575 | } |
3576 | ||
57266a6e BF |
3577 | static const u32 nfs4_minimal_spo_must_enforce[2] = { |
3578 | [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | | |
3579 | 1 << (OP_EXCHANGE_ID - 32) | | |
3580 | 1 << (OP_CREATE_SESSION - 32) | | |
3581 | 1 << (OP_DESTROY_SESSION - 32) | | |
3582 | 1 << (OP_DESTROY_CLIENTID - 32) | |
3583 | }; | |
3584 | ||
2db134eb | 3585 | static __be32 |
57b7b43b | 3586 | nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, __be32 nfserr, |
2db134eb AA |
3587 | struct nfsd4_exchange_id *exid) |
3588 | { | |
d0a381dd | 3589 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3590 | __be32 *p; |
0733d213 AA |
3591 | char *major_id; |
3592 | char *server_scope; | |
3593 | int major_id_sz; | |
3594 | int server_scope_sz; | |
3595 | uint64_t minor_id = 0; | |
3596 | ||
3597 | if (nfserr) | |
3598 | return nfserr; | |
3599 | ||
3600 | major_id = utsname()->nodename; | |
3601 | major_id_sz = strlen(major_id); | |
3602 | server_scope = utsname()->nodename; | |
3603 | server_scope_sz = strlen(server_scope); | |
3604 | ||
d0a381dd | 3605 | p = xdr_reserve_space(xdr, |
0733d213 AA |
3606 | 8 /* eir_clientid */ + |
3607 | 4 /* eir_sequenceid */ + | |
3608 | 4 /* eir_flags */ + | |
a8bb84bc | 3609 | 4 /* spr_how */); |
d0a381dd BF |
3610 | if (!p) |
3611 | return nfserr_resource; | |
0733d213 | 3612 | |
0c0c267b | 3613 | p = xdr_encode_opaque_fixed(p, &exid->clientid, 8); |
c373b0a4 BF |
3614 | *p++ = cpu_to_be32(exid->seqid); |
3615 | *p++ = cpu_to_be32(exid->flags); | |
0733d213 | 3616 | |
c373b0a4 | 3617 | *p++ = cpu_to_be32(exid->spa_how); |
a8bb84bc | 3618 | |
57266a6e BF |
3619 | switch (exid->spa_how) { |
3620 | case SP4_NONE: | |
3621 | break; | |
3622 | case SP4_MACH_CRED: | |
a8bb84bc | 3623 | /* spo_must_enforce, spo_must_allow */ |
d0a381dd BF |
3624 | p = xdr_reserve_space(xdr, 16); |
3625 | if (!p) | |
3626 | return nfserr_resource; | |
a8bb84bc | 3627 | |
57266a6e | 3628 | /* spo_must_enforce bitmap: */ |
c373b0a4 BF |
3629 | *p++ = cpu_to_be32(2); |
3630 | *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[0]); | |
3631 | *p++ = cpu_to_be32(nfs4_minimal_spo_must_enforce[1]); | |
57266a6e | 3632 | /* empty spo_must_allow bitmap: */ |
c373b0a4 | 3633 | *p++ = cpu_to_be32(0); |
a8bb84bc | 3634 | |
57266a6e BF |
3635 | break; |
3636 | default: | |
3637 | WARN_ON_ONCE(1); | |
3638 | } | |
0733d213 | 3639 | |
d0a381dd | 3640 | p = xdr_reserve_space(xdr, |
a8bb84bc KM |
3641 | 8 /* so_minor_id */ + |
3642 | 4 /* so_major_id.len */ + | |
3643 | (XDR_QUADLEN(major_id_sz) * 4) + | |
3644 | 4 /* eir_server_scope.len */ + | |
3645 | (XDR_QUADLEN(server_scope_sz) * 4) + | |
3646 | 4 /* eir_server_impl_id.count (0) */); | |
d0a381dd BF |
3647 | if (!p) |
3648 | return nfserr_resource; | |
a8bb84bc | 3649 | |
0733d213 | 3650 | /* The server_owner struct */ |
b64c7f3b | 3651 | p = xdr_encode_hyper(p, minor_id); /* Minor id */ |
0733d213 | 3652 | /* major id */ |
0c0c267b | 3653 | p = xdr_encode_opaque(p, major_id, major_id_sz); |
0733d213 AA |
3654 | |
3655 | /* Server scope */ | |
0c0c267b | 3656 | p = xdr_encode_opaque(p, server_scope, server_scope_sz); |
0733d213 AA |
3657 | |
3658 | /* Implementation id */ | |
c373b0a4 | 3659 | *p++ = cpu_to_be32(0); /* zero length nfs_impl_id4 array */ |
0733d213 | 3660 | return 0; |
2db134eb AA |
3661 | } |
3662 | ||
3663 | static __be32 | |
57b7b43b | 3664 | nfsd4_encode_create_session(struct nfsd4_compoundres *resp, __be32 nfserr, |
2db134eb AA |
3665 | struct nfsd4_create_session *sess) |
3666 | { | |
d0a381dd | 3667 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3668 | __be32 *p; |
ec6b5d7b AA |
3669 | |
3670 | if (nfserr) | |
3671 | return nfserr; | |
3672 | ||
d0a381dd BF |
3673 | p = xdr_reserve_space(xdr, 24); |
3674 | if (!p) | |
3675 | return nfserr_resource; | |
0c0c267b BF |
3676 | p = xdr_encode_opaque_fixed(p, sess->sessionid.data, |
3677 | NFS4_MAX_SESSIONID_LEN); | |
c373b0a4 BF |
3678 | *p++ = cpu_to_be32(sess->seqid); |
3679 | *p++ = cpu_to_be32(sess->flags); | |
ec6b5d7b | 3680 | |
d0a381dd BF |
3681 | p = xdr_reserve_space(xdr, 28); |
3682 | if (!p) | |
3683 | return nfserr_resource; | |
c373b0a4 BF |
3684 | *p++ = cpu_to_be32(0); /* headerpadsz */ |
3685 | *p++ = cpu_to_be32(sess->fore_channel.maxreq_sz); | |
3686 | *p++ = cpu_to_be32(sess->fore_channel.maxresp_sz); | |
3687 | *p++ = cpu_to_be32(sess->fore_channel.maxresp_cached); | |
3688 | *p++ = cpu_to_be32(sess->fore_channel.maxops); | |
3689 | *p++ = cpu_to_be32(sess->fore_channel.maxreqs); | |
3690 | *p++ = cpu_to_be32(sess->fore_channel.nr_rdma_attrs); | |
ec6b5d7b AA |
3691 | |
3692 | if (sess->fore_channel.nr_rdma_attrs) { | |
d0a381dd BF |
3693 | p = xdr_reserve_space(xdr, 4); |
3694 | if (!p) | |
3695 | return nfserr_resource; | |
c373b0a4 | 3696 | *p++ = cpu_to_be32(sess->fore_channel.rdma_attrs); |
ec6b5d7b AA |
3697 | } |
3698 | ||
d0a381dd BF |
3699 | p = xdr_reserve_space(xdr, 28); |
3700 | if (!p) | |
3701 | return nfserr_resource; | |
c373b0a4 BF |
3702 | *p++ = cpu_to_be32(0); /* headerpadsz */ |
3703 | *p++ = cpu_to_be32(sess->back_channel.maxreq_sz); | |
3704 | *p++ = cpu_to_be32(sess->back_channel.maxresp_sz); | |
3705 | *p++ = cpu_to_be32(sess->back_channel.maxresp_cached); | |
3706 | *p++ = cpu_to_be32(sess->back_channel.maxops); | |
3707 | *p++ = cpu_to_be32(sess->back_channel.maxreqs); | |
3708 | *p++ = cpu_to_be32(sess->back_channel.nr_rdma_attrs); | |
ec6b5d7b AA |
3709 | |
3710 | if (sess->back_channel.nr_rdma_attrs) { | |
d0a381dd BF |
3711 | p = xdr_reserve_space(xdr, 4); |
3712 | if (!p) | |
3713 | return nfserr_resource; | |
c373b0a4 | 3714 | *p++ = cpu_to_be32(sess->back_channel.rdma_attrs); |
ec6b5d7b AA |
3715 | } |
3716 | return 0; | |
2db134eb AA |
3717 | } |
3718 | ||
c47d832b | 3719 | static __be32 |
57b7b43b | 3720 | nfsd4_encode_sequence(struct nfsd4_compoundres *resp, __be32 nfserr, |
2db134eb AA |
3721 | struct nfsd4_sequence *seq) |
3722 | { | |
d0a381dd | 3723 | struct xdr_stream *xdr = &resp->xdr; |
bc749ca4 | 3724 | __be32 *p; |
b85d4c01 BH |
3725 | |
3726 | if (nfserr) | |
3727 | return nfserr; | |
3728 | ||
d0a381dd BF |
3729 | p = xdr_reserve_space(xdr, NFS4_MAX_SESSIONID_LEN + 20); |
3730 | if (!p) | |
3731 | return nfserr_resource; | |
0c0c267b BF |
3732 | p = xdr_encode_opaque_fixed(p, seq->sessionid.data, |
3733 | NFS4_MAX_SESSIONID_LEN); | |
c373b0a4 BF |
3734 | *p++ = cpu_to_be32(seq->seqid); |
3735 | *p++ = cpu_to_be32(seq->slotid); | |
b7d7ca35 | 3736 | /* Note slotid's are numbered from zero: */ |
c373b0a4 BF |
3737 | *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_highest_slotid */ |
3738 | *p++ = cpu_to_be32(seq->maxslots - 1); /* sr_target_highest_slotid */ | |
3739 | *p++ = cpu_to_be32(seq->status_flags); | |
b85d4c01 | 3740 | |
f5236013 | 3741 | resp->cstate.data_offset = xdr->buf->len; /* DRC cache data pointer */ |
b85d4c01 | 3742 | return 0; |
2db134eb AA |
3743 | } |
3744 | ||
2355c596 | 3745 | static __be32 |
57b7b43b | 3746 | nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, __be32 nfserr, |
17456804 BS |
3747 | struct nfsd4_test_stateid *test_stateid) |
3748 | { | |
d0a381dd | 3749 | struct xdr_stream *xdr = &resp->xdr; |
03cfb420 | 3750 | struct nfsd4_test_stateid_id *stateid, *next; |
17456804 | 3751 | __be32 *p; |
17456804 | 3752 | |
a11fcce1 BF |
3753 | if (nfserr) |
3754 | return nfserr; | |
3755 | ||
d0a381dd BF |
3756 | p = xdr_reserve_space(xdr, 4 + (4 * test_stateid->ts_num_ids)); |
3757 | if (!p) | |
3758 | return nfserr_resource; | |
17456804 | 3759 | *p++ = htonl(test_stateid->ts_num_ids); |
17456804 | 3760 | |
03cfb420 | 3761 | list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) { |
02f5fde5 | 3762 | *p++ = stateid->ts_id_status; |
17456804 | 3763 | } |
17456804 BS |
3764 | |
3765 | return nfserr; | |
3766 | } | |
3767 | ||
695e12f8 BH |
3768 | static __be32 |
3769 | nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) | |
3770 | { | |
3771 | return nfserr; | |
3772 | } | |
3773 | ||
3774 | typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); | |
3775 | ||
2db134eb AA |
3776 | /* |
3777 | * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 | |
3778 | * since we don't need to filter out obsolete ops as this is | |
3779 | * done in the decoding phase. | |
3780 | */ | |
695e12f8 | 3781 | static nfsd4_enc nfsd4_enc_ops[] = { |
ad1060c8 BF |
3782 | [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, |
3783 | [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, | |
3784 | [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, | |
3785 | [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, | |
3786 | [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, | |
3787 | [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, | |
3788 | [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, | |
3789 | [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, | |
3790 | [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, | |
3791 | [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, | |
3792 | [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, | |
3793 | [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, | |
3794 | [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, | |
3795 | [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, | |
3796 | [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, | |
3797 | [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, | |
84f09f46 | 3798 | [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, |
ad1060c8 BF |
3799 | [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, |
3800 | [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, | |
3801 | [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, | |
3802 | [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, | |
3803 | [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, | |
3804 | [OP_READ] = (nfsd4_enc)nfsd4_encode_read, | |
3805 | [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, | |
3806 | [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, | |
3807 | [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, | |
3808 | [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, | |
3809 | [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, | |
3810 | [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, | |
3811 | [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, | |
3812 | [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, | |
3813 | [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, | |
3814 | [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, | |
3815 | [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, | |
3816 | [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, | |
3817 | [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, | |
3818 | [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, | |
2db134eb AA |
3819 | |
3820 | /* NFSv4.1 operations */ | |
3821 | [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, | |
1d1bc8f2 | 3822 | [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_bind_conn_to_session, |
2db134eb AA |
3823 | [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, |
3824 | [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, | |
43212cc7 KM |
3825 | [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_noop, |
3826 | [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, | |
2db134eb AA |
3827 | [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
3828 | [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, | |
3829 | [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, | |
3830 | [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, | |
3831 | [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, | |
3832 | [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, | |
22b6dee8 | 3833 | [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_secinfo_no_name, |
2db134eb AA |
3834 | [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, |
3835 | [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, | |
17456804 | 3836 | [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_test_stateid, |
2db134eb AA |
3837 | [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, |
3838 | [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, | |
3839 | [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, | |
87a15a80 AS |
3840 | |
3841 | /* NFSv4.2 operations */ | |
3842 | [OP_ALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, | |
3843 | [OP_COPY] = (nfsd4_enc)nfsd4_encode_noop, | |
3844 | [OP_COPY_NOTIFY] = (nfsd4_enc)nfsd4_encode_noop, | |
3845 | [OP_DEALLOCATE] = (nfsd4_enc)nfsd4_encode_noop, | |
3846 | [OP_IO_ADVISE] = (nfsd4_enc)nfsd4_encode_noop, | |
3847 | [OP_LAYOUTERROR] = (nfsd4_enc)nfsd4_encode_noop, | |
3848 | [OP_LAYOUTSTATS] = (nfsd4_enc)nfsd4_encode_noop, | |
3849 | [OP_OFFLOAD_CANCEL] = (nfsd4_enc)nfsd4_encode_noop, | |
3850 | [OP_OFFLOAD_STATUS] = (nfsd4_enc)nfsd4_encode_noop, | |
3851 | [OP_READ_PLUS] = (nfsd4_enc)nfsd4_encode_noop, | |
3852 | [OP_SEEK] = (nfsd4_enc)nfsd4_encode_noop, | |
3853 | [OP_WRITE_SAME] = (nfsd4_enc)nfsd4_encode_noop, | |
695e12f8 BH |
3854 | }; |
3855 | ||
496c262c | 3856 | /* |
a8095f7e BF |
3857 | * Calculate whether we still have space to encode repsize bytes. |
3858 | * There are two considerations: | |
3859 | * - For NFS versions >=4.1, the size of the reply must stay within | |
3860 | * session limits | |
3861 | * - For all NFS versions, we must stay within limited preallocated | |
3862 | * buffer space. | |
496c262c | 3863 | * |
a8095f7e BF |
3864 | * This is called before the operation is processed, so can only provide |
3865 | * an upper estimate. For some nonidempotent operations (such as | |
3866 | * getattr), it's not necessarily a problem if that estimate is wrong, | |
3867 | * as we can fail it after processing without significant side effects. | |
496c262c | 3868 | */ |
a8095f7e | 3869 | __be32 nfsd4_check_resp_size(struct nfsd4_compoundres *resp, u32 respsize) |
496c262c | 3870 | { |
67492c99 | 3871 | struct xdr_buf *buf = &resp->rqstp->rq_res; |
47ee5298 | 3872 | struct nfsd4_slot *slot = resp->cstate.slot; |
496c262c | 3873 | |
47ee5298 BF |
3874 | if (buf->len + respsize <= buf->buflen) |
3875 | return nfs_ok; | |
3876 | if (!nfsd4_has_session(&resp->cstate)) | |
ea8d7720 | 3877 | return nfserr_resource; |
47ee5298 BF |
3878 | if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) { |
3879 | WARN_ON_ONCE(1); | |
3880 | return nfserr_rep_too_big_to_cache; | |
ea8d7720 | 3881 | } |
47ee5298 | 3882 | return nfserr_rep_too_big; |
496c262c AA |
3883 | } |
3884 | ||
1da177e4 LT |
3885 | void |
3886 | nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) | |
3887 | { | |
082d4bd7 | 3888 | struct xdr_stream *xdr = &resp->xdr; |
9411b1d4 | 3889 | struct nfs4_stateowner *so = resp->cstate.replay_owner; |
5f4ab945 | 3890 | struct svc_rqst *rqstp = resp->rqstp; |
082d4bd7 | 3891 | int post_err_offset; |
07d1f802 | 3892 | nfsd4_enc encoder; |
bc749ca4 | 3893 | __be32 *p; |
1da177e4 | 3894 | |
d0a381dd BF |
3895 | p = xdr_reserve_space(xdr, 8); |
3896 | if (!p) { | |
3897 | WARN_ON_ONCE(1); | |
3898 | return; | |
3899 | } | |
c373b0a4 | 3900 | *p++ = cpu_to_be32(op->opnum); |
082d4bd7 | 3901 | post_err_offset = xdr->buf->len; |
1da177e4 | 3902 | |
695e12f8 BH |
3903 | if (op->opnum == OP_ILLEGAL) |
3904 | goto status; | |
3905 | BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || | |
3906 | !nfsd4_enc_ops[op->opnum]); | |
07d1f802 BF |
3907 | encoder = nfsd4_enc_ops[op->opnum]; |
3908 | op->status = encoder(resp, op->status, &op->u); | |
2825a7f9 BF |
3909 | xdr_commit_encode(xdr); |
3910 | ||
067e1ace | 3911 | /* nfsd4_check_resp_size guarantees enough room for error status */ |
5f4ab945 BF |
3912 | if (!op->status) { |
3913 | int space_needed = 0; | |
3914 | if (!nfsd4_last_compound_op(rqstp)) | |
3915 | space_needed = COMPOUND_ERR_SLACK_SPACE; | |
3916 | op->status = nfsd4_check_resp_size(resp, space_needed); | |
3917 | } | |
c8f13d97 BF |
3918 | if (op->status == nfserr_resource && nfsd4_has_session(&resp->cstate)) { |
3919 | struct nfsd4_slot *slot = resp->cstate.slot; | |
3920 | ||
3921 | if (slot->sl_flags & NFSD4_SLOT_CACHETHIS) | |
3922 | op->status = nfserr_rep_too_big_to_cache; | |
3923 | else | |
3924 | op->status = nfserr_rep_too_big; | |
3925 | } | |
07d1f802 BF |
3926 | if (op->status == nfserr_resource || |
3927 | op->status == nfserr_rep_too_big || | |
3928 | op->status == nfserr_rep_too_big_to_cache) { | |
3929 | /* | |
3930 | * The operation may have already been encoded or | |
3931 | * partially encoded. No op returns anything additional | |
3932 | * in the case of one of these three errors, so we can | |
3933 | * just truncate back to after the status. But it's a | |
3934 | * bug if we had to do this on a non-idempotent op: | |
3935 | */ | |
3936 | warn_on_nonidempotent_op(op); | |
082d4bd7 | 3937 | xdr_truncate_encode(xdr, post_err_offset); |
07d1f802 | 3938 | } |
9411b1d4 | 3939 | if (so) { |
082d4bd7 BF |
3940 | int len = xdr->buf->len - post_err_offset; |
3941 | ||
9411b1d4 | 3942 | so->so_replay.rp_status = op->status; |
082d4bd7 BF |
3943 | so->so_replay.rp_buflen = len; |
3944 | read_bytes_from_xdr_buf(xdr->buf, post_err_offset, | |
3945 | so->so_replay.rp_buf, len); | |
9411b1d4 | 3946 | } |
695e12f8 | 3947 | status: |
082d4bd7 BF |
3948 | /* Note that op->status is already in network byte order: */ |
3949 | write_bytes_to_xdr_buf(xdr->buf, post_err_offset - 4, &op->status, 4); | |
1da177e4 LT |
3950 | } |
3951 | ||
3952 | /* | |
3953 | * Encode the reply stored in the stateowner reply cache | |
3954 | * | |
3955 | * XDR note: do not encode rp->rp_buflen: the buffer contains the | |
3956 | * previously sent already encoded operation. | |
1da177e4 LT |
3957 | */ |
3958 | void | |
d0a381dd | 3959 | nfsd4_encode_replay(struct xdr_stream *xdr, struct nfsd4_op *op) |
1da177e4 | 3960 | { |
bc749ca4 | 3961 | __be32 *p; |
1da177e4 LT |
3962 | struct nfs4_replay *rp = op->replay; |
3963 | ||
3964 | BUG_ON(!rp); | |
3965 | ||
d0a381dd BF |
3966 | p = xdr_reserve_space(xdr, 8 + rp->rp_buflen); |
3967 | if (!p) { | |
3968 | WARN_ON_ONCE(1); | |
3969 | return; | |
3970 | } | |
c373b0a4 | 3971 | *p++ = cpu_to_be32(op->opnum); |
1da177e4 | 3972 | *p++ = rp->rp_status; /* already xdr'ed */ |
1da177e4 | 3973 | |
0c0c267b | 3974 | p = xdr_encode_opaque_fixed(p, rp->rp_buf, rp->rp_buflen); |
1da177e4 LT |
3975 | } |
3976 | ||
1da177e4 | 3977 | int |
2ebbc012 | 3978 | nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
1da177e4 LT |
3979 | { |
3980 | return xdr_ressize_check(rqstp, p); | |
3981 | } | |
3982 | ||
3e98abff | 3983 | int nfsd4_release_compoundargs(void *rq, __be32 *p, void *resp) |
1da177e4 | 3984 | { |
3e98abff BF |
3985 | struct svc_rqst *rqstp = rq; |
3986 | struct nfsd4_compoundargs *args = rqstp->rq_argp; | |
3987 | ||
1da177e4 LT |
3988 | if (args->ops != args->iops) { |
3989 | kfree(args->ops); | |
3990 | args->ops = args->iops; | |
3991 | } | |
f99d49ad JJ |
3992 | kfree(args->tmpp); |
3993 | args->tmpp = NULL; | |
1da177e4 | 3994 | while (args->to_free) { |
d5e23383 | 3995 | struct svcxdr_tmpbuf *tb = args->to_free; |
1da177e4 | 3996 | args->to_free = tb->next; |
1da177e4 LT |
3997 | kfree(tb); |
3998 | } | |
3e98abff | 3999 | return 1; |
1da177e4 LT |
4000 | } |
4001 | ||
4002 | int | |
2ebbc012 | 4003 | nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) |
1da177e4 | 4004 | { |
e874f9f8 JL |
4005 | if (rqstp->rq_arg.head[0].iov_len % 4) { |
4006 | /* client is nuts */ | |
4007 | dprintk("%s: compound not properly padded! (peeraddr=%pISc xid=0x%x)", | |
4008 | __func__, svc_addr(rqstp), be32_to_cpu(rqstp->rq_xid)); | |
4009 | return 0; | |
4010 | } | |
1da177e4 LT |
4011 | args->p = p; |
4012 | args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; | |
4013 | args->pagelist = rqstp->rq_arg.pages; | |
4014 | args->pagelen = rqstp->rq_arg.page_len; | |
4015 | args->tmpp = NULL; | |
4016 | args->to_free = NULL; | |
4017 | args->ops = args->iops; | |
4018 | args->rqstp = rqstp; | |
4019 | ||
3e98abff | 4020 | return !nfsd4_decode_compound(args); |
1da177e4 LT |
4021 | } |
4022 | ||
4023 | int | |
2ebbc012 | 4024 | nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) |
1da177e4 LT |
4025 | { |
4026 | /* | |
4027 | * All that remains is to write the tag and operation count... | |
4028 | */ | |
6ac90391 BF |
4029 | struct xdr_buf *buf = resp->xdr.buf; |
4030 | ||
4031 | WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len + | |
4032 | buf->tail[0].iov_len); | |
dd97fdde | 4033 | |
2825a7f9 BF |
4034 | rqstp->rq_next_page = resp->xdr.page_ptr + 1; |
4035 | ||
1da177e4 LT |
4036 | p = resp->tagp; |
4037 | *p++ = htonl(resp->taglen); | |
4038 | memcpy(p, resp->tag, resp->taglen); | |
4039 | p += XDR_QUADLEN(resp->taglen); | |
4040 | *p++ = htonl(resp->opcnt); | |
4041 | ||
b607664e | 4042 | nfsd4_sequence_done(resp); |
1da177e4 LT |
4043 | return 1; |
4044 | } | |
4045 | ||
4046 | /* | |
4047 | * Local variables: | |
4048 | * c-basic-offset: 8 | |
4049 | * End: | |
4050 | */ |