1 | /* $NetBSD: puffs_compat.c,v 1.4 2015/04/22 17:07:24 pooka Exp $ */ |
2 | |
3 | /* |
4 | * Copyright (c) 2010 Antti Kantee. All Rights Reserved. |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
9 | * 1. Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * 2. Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
14 | * |
15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS |
16 | * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
17 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
18 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
19 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
20 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
21 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
22 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
23 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
24 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
25 | * SUCH DAMAGE. |
26 | */ |
27 | |
28 | /* |
29 | * This file handles puffs PDUs so that they are compatible between |
30 | * 32bit<->64bit time_t/dev_t. It enables running a -current kernel |
31 | * against a 5.0 userland (assuming the protocol otherwise matches!). |
32 | */ |
33 | |
34 | #include <sys/cdefs.h> |
35 | __KERNEL_RCSID(0, "$NetBSD: puffs_compat.c,v 1.4 2015/04/22 17:07:24 pooka Exp $" ); |
36 | |
37 | #include <sys/param.h> |
38 | #include <sys/atomic.h> |
39 | #include <sys/kmem.h> |
40 | #include <sys/kthread.h> |
41 | #include <sys/lock.h> |
42 | #include <sys/mount.h> |
43 | #include <sys/namei.h> |
44 | #include <sys/proc.h> |
45 | #include <sys/vnode.h> |
46 | #include <sys/atomic.h> |
47 | |
48 | #include <dev/putter/putter_sys.h> |
49 | |
50 | #include <fs/puffs/puffs_msgif.h> |
51 | #include <fs/puffs/puffs_sys.h> |
52 | |
53 | #include <compat/sys/time.h> |
54 | |
55 | /* |
56 | * compat types |
57 | */ |
58 | struct vattr50 { |
59 | enum vtype va_type; |
60 | mode_t va_mode; |
61 | nlink_t va_nlink; |
62 | uid_t va_uid; |
63 | gid_t va_gid; |
64 | uint32_t va_fsid; |
65 | ino_t va_fileid; |
66 | u_quad_t va_size; |
67 | long va_blocksize; |
68 | struct timespec50 va_atime; |
69 | struct timespec50 va_mtime; |
70 | struct timespec50 va_ctime; |
71 | struct timespec50 va_birthtime; |
72 | u_long va_gen; |
73 | u_long va_flags; |
74 | uint32_t va_rdev; |
75 | u_quad_t va_bytes; |
76 | u_quad_t va_filerev; |
77 | u_int va_vaflags; |
78 | long va_spare; |
79 | }; |
80 | |
81 | struct puffs50_vfsmsg_fhtonode { |
82 | struct puffs_req pvfsr_pr; |
83 | |
84 | void *pvfsr_fhcookie; /* IN */ |
85 | enum vtype pvfsr_vtype; /* IN */ |
86 | voff_t pvfsr_size; /* IN */ |
87 | uint32_t pvfsr_rdev; /* IN */ |
88 | |
89 | size_t pvfsr_dsize; /* OUT */ |
90 | uint8_t pvfsr_data[0] /* OUT, XXX */ |
91 | __aligned(ALIGNBYTES+1); |
92 | }; |
93 | |
94 | struct puffs50_vnmsg_lookup { |
95 | struct puffs_req pvn_pr; |
96 | |
97 | struct puffs_kcn pvnr_cn; /* OUT */ |
98 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
99 | |
100 | puffs_cookie_t pvnr_newnode; /* IN */ |
101 | enum vtype pvnr_vtype; /* IN */ |
102 | voff_t pvnr_size; /* IN */ |
103 | uint32_t pvnr_rdev; /* IN */ |
104 | }; |
105 | |
106 | struct puffs50_vnmsg_create { |
107 | struct puffs_req pvn_pr; |
108 | |
109 | struct puffs_kcn pvnr_cn; /* OUT */ |
110 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
111 | |
112 | struct vattr50 pvnr_va; /* OUT */ |
113 | puffs_cookie_t pvnr_newnode; /* IN */ |
114 | }; |
115 | |
116 | struct puffs50_vnmsg_mknod { |
117 | struct puffs_req pvn_pr; |
118 | |
119 | struct puffs_kcn pvnr_cn; /* OUT */ |
120 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
121 | |
122 | struct vattr50 pvnr_va; /* OUT */ |
123 | puffs_cookie_t pvnr_newnode; /* IN */ |
124 | }; |
125 | |
126 | #define puffs50_vnmsg_setattr puffs50_vnmsg_setgetattr |
127 | #define puffs50_vnmsg_getattr puffs50_vnmsg_setgetattr |
128 | struct puffs50_vnmsg_setgetattr { |
129 | struct puffs_req pvn_pr; |
130 | |
131 | struct puffs_kcred pvnr_cred; /* OUT */ |
132 | struct vattr50 pvnr_va; /* IN/OUT (op depend) */ |
133 | }; |
134 | |
135 | struct puffs50_vnmsg_mkdir { |
136 | struct puffs_req pvn_pr; |
137 | |
138 | struct puffs_kcn pvnr_cn; /* OUT */ |
139 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
140 | |
141 | struct vattr50 pvnr_va; /* OUT */ |
142 | puffs_cookie_t pvnr_newnode; /* IN */ |
143 | }; |
144 | |
145 | struct puffs50_vnmsg_symlink { |
146 | struct puffs_req pvn_pr; |
147 | |
148 | struct puffs_kcn pvnr_cn; /* OUT */ |
149 | struct puffs_kcred pvnr_cn_cred; /* OUT */ |
150 | |
151 | struct vattr50 pvnr_va; /* OUT */ |
152 | puffs_cookie_t pvnr_newnode; /* IN */ |
153 | char pvnr_link[MAXPATHLEN]; /* OUT */ |
154 | }; |
155 | |
156 | /* |
157 | * vattr translation routines |
158 | */ |
159 | |
160 | #ifdef COMPAT_50 |
161 | static void |
162 | vattr_to_50(const struct vattr *va, struct vattr50 *va50) |
163 | { |
164 | |
165 | va50->va_type = va->va_type; |
166 | va50->va_mode = va->va_mode; |
167 | va50->va_nlink = va->va_nlink; |
168 | va50->va_uid = va->va_uid; |
169 | va50->va_gid = va->va_gid; |
170 | va50->va_fsid = (uint64_t)va->va_fsid; |
171 | va50->va_fileid = va->va_fileid; |
172 | va50->va_size = va->va_size; |
173 | va50->va_blocksize = va->va_blocksize; |
174 | timespec_to_timespec50(&va->va_atime, &va50->va_atime); |
175 | timespec_to_timespec50(&va->va_ctime, &va50->va_ctime); |
176 | timespec_to_timespec50(&va->va_mtime, &va50->va_mtime); |
177 | timespec_to_timespec50(&va->va_birthtime, &va50->va_birthtime); |
178 | va50->va_gen = va->va_gen; |
179 | va50->va_flags = va->va_flags; |
180 | va50->va_rdev = (int32_t)va->va_rdev; |
181 | va50->va_bytes = va->va_bytes; |
182 | va50->va_filerev = va->va_filerev; |
183 | va50->va_vaflags = va->va_flags; |
184 | } |
185 | |
186 | static void |
187 | vattr_from_50(const struct vattr50 *va50, struct vattr *va) |
188 | { |
189 | |
190 | va->va_type = va50->va_type; |
191 | va->va_mode = va50->va_mode; |
192 | va->va_nlink = va50->va_nlink; |
193 | va->va_uid = va50->va_uid; |
194 | va->va_gid = va50->va_gid; |
195 | va->va_fsid = (uint32_t)va50->va_fsid; |
196 | va->va_fileid = va50->va_fileid; |
197 | va->va_size = va50->va_size; |
198 | va->va_blocksize = va50->va_blocksize; |
199 | timespec50_to_timespec(&va50->va_atime, &va->va_atime); |
200 | timespec50_to_timespec(&va50->va_ctime, &va->va_ctime); |
201 | timespec50_to_timespec(&va50->va_mtime, &va->va_mtime); |
202 | timespec50_to_timespec(&va50->va_birthtime, &va->va_birthtime); |
203 | va->va_gen = va50->va_gen; |
204 | va->va_flags = va50->va_flags; |
205 | va->va_rdev = (uint32_t)va50->va_rdev; |
206 | va->va_bytes = va50->va_bytes; |
207 | va->va_filerev = va50->va_filerev; |
208 | va->va_vaflags = va50->va_flags; |
209 | } |
210 | #endif /* COMPAT_50 */ |
211 | |
212 | /* |
213 | * XXX: cannot assert that sleeping is possible |
214 | * (this always a valid assumption for now) |
215 | */ |
216 | #define INIT(name, extra) \ |
217 | struct puffs50_##name *cmsg; \ |
218 | struct puffs_##name *omsg; \ |
219 | creq =kmem_zalloc(sizeof(struct puffs50_##name)+extra,KM_SLEEP);\ |
220 | cmsg = (struct puffs50_##name *)creq; \ |
221 | omsg = (struct puffs_##name *)oreq; \ |
222 | delta = sizeof(struct puffs50_##name)-sizeof(struct puffs_##name); |
223 | #define ASSIGN(field) \ |
224 | cmsg->field = omsg->field; |
225 | |
226 | bool |
227 | puffs_compat_outgoing(struct puffs_req *oreq, |
228 | struct puffs_req **creqp, ssize_t *deltap) |
229 | { |
230 | bool rv = false; |
231 | #ifdef COMPAT_50 |
232 | struct puffs_req *creq = NULL; |
233 | ssize_t delta = 0; |
234 | |
235 | if (PUFFSOP_OPCLASS(oreq->preq_opclass) == PUFFSOP_VFS |
236 | && oreq->preq_optype == PUFFS_VFS_FHTOVP) { |
237 | INIT(vfsmsg_fhtonode, |
238 | ((struct puffs_vfsmsg_fhtonode *)oreq)->pvfsr_dsize); |
239 | |
240 | ASSIGN(pvfsr_pr); |
241 | ASSIGN(pvfsr_dsize); |
242 | memcpy(cmsg->pvfsr_data, omsg->pvfsr_data, cmsg->pvfsr_dsize); |
243 | } else if (PUFFSOP_OPCLASS(oreq->preq_opclass) == PUFFSOP_VN) { |
244 | switch (oreq->preq_optype) { |
245 | case PUFFS_VN_LOOKUP: |
246 | { |
247 | INIT(vnmsg_lookup, 0); |
248 | |
249 | ASSIGN(pvn_pr); |
250 | ASSIGN(pvnr_cn); |
251 | ASSIGN(pvnr_cn_cred); |
252 | |
253 | break; |
254 | } |
255 | |
256 | case PUFFS_VN_CREATE: |
257 | { |
258 | INIT(vnmsg_create, 0); |
259 | |
260 | ASSIGN(pvn_pr); |
261 | ASSIGN(pvnr_cn); |
262 | ASSIGN(pvnr_cn_cred); |
263 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
264 | |
265 | break; |
266 | } |
267 | |
268 | case PUFFS_VN_MKNOD: |
269 | { |
270 | INIT(vnmsg_mknod, 0); |
271 | |
272 | ASSIGN(pvn_pr); |
273 | ASSIGN(pvnr_cn); |
274 | ASSIGN(pvnr_cn_cred); |
275 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
276 | |
277 | break; |
278 | } |
279 | |
280 | case PUFFS_VN_MKDIR: |
281 | { |
282 | INIT(vnmsg_mkdir, 0); |
283 | |
284 | ASSIGN(pvn_pr); |
285 | ASSIGN(pvnr_cn); |
286 | ASSIGN(pvnr_cn_cred); |
287 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
288 | |
289 | break; |
290 | } |
291 | |
292 | case PUFFS_VN_SYMLINK: |
293 | { |
294 | INIT(vnmsg_symlink, 0); |
295 | |
296 | ASSIGN(pvn_pr); |
297 | ASSIGN(pvnr_cn); |
298 | ASSIGN(pvnr_cn_cred); |
299 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
300 | memcpy(cmsg->pvnr_link, omsg->pvnr_link, |
301 | sizeof(cmsg->pvnr_link)); |
302 | |
303 | break; |
304 | } |
305 | |
306 | case PUFFS_VN_SETATTR: |
307 | { |
308 | INIT(vnmsg_setattr, 0); |
309 | |
310 | ASSIGN(pvn_pr); |
311 | ASSIGN(pvnr_cred); |
312 | vattr_to_50(&omsg->pvnr_va, &cmsg->pvnr_va); |
313 | |
314 | break; |
315 | } |
316 | case PUFFS_VN_GETATTR: |
317 | { |
318 | INIT(vnmsg_getattr, 0); |
319 | |
320 | ASSIGN(pvn_pr); |
321 | ASSIGN(pvnr_cred); |
322 | |
323 | break; |
324 | } |
325 | |
326 | default: |
327 | break; |
328 | } |
329 | } |
330 | |
331 | if (creq) { |
332 | *creqp = creq; |
333 | *deltap = delta; |
334 | rv = true; |
335 | } |
336 | #endif |
337 | |
338 | return rv; |
339 | } |
340 | #undef INIT |
341 | #undef ASSIGN |
342 | |
343 | #define INIT(name) \ |
344 | struct puffs50_##name *cmsg = (void *)preq; \ |
345 | struct puffs_##name *omsg = (void *)creq; |
346 | #define ASSIGN(field) \ |
347 | omsg->field = cmsg->field; |
348 | |
349 | void |
350 | puffs_compat_incoming(struct puffs_req *preq, struct puffs_req *creq) |
351 | { |
352 | |
353 | #ifdef COMPAT_50 |
354 | if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VFS |
355 | && preq->preq_optype == PUFFS_VFS_FHTOVP) { |
356 | INIT(vfsmsg_fhtonode); |
357 | |
358 | ASSIGN(pvfsr_pr); |
359 | |
360 | ASSIGN(pvfsr_fhcookie); |
361 | ASSIGN(pvfsr_vtype); |
362 | ASSIGN(pvfsr_size); |
363 | ASSIGN(pvfsr_rdev); |
364 | } else if (PUFFSOP_OPCLASS(preq->preq_opclass) == PUFFSOP_VN) { |
365 | switch (preq->preq_optype) { |
366 | case PUFFS_VN_LOOKUP: |
367 | { |
368 | INIT(vnmsg_lookup); |
369 | |
370 | ASSIGN(pvn_pr); |
371 | ASSIGN(pvnr_newnode); |
372 | ASSIGN(pvnr_vtype); |
373 | ASSIGN(pvnr_size); |
374 | ASSIGN(pvnr_rdev); |
375 | |
376 | break; |
377 | } |
378 | |
379 | case PUFFS_VN_CREATE: |
380 | { |
381 | INIT(vnmsg_create); |
382 | |
383 | ASSIGN(pvn_pr); |
384 | ASSIGN(pvnr_newnode); |
385 | |
386 | break; |
387 | } |
388 | |
389 | case PUFFS_VN_MKNOD: |
390 | { |
391 | INIT(vnmsg_mknod); |
392 | |
393 | ASSIGN(pvn_pr); |
394 | ASSIGN(pvnr_newnode); |
395 | |
396 | break; |
397 | } |
398 | |
399 | case PUFFS_VN_MKDIR: |
400 | { |
401 | INIT(vnmsg_mkdir); |
402 | |
403 | ASSIGN(pvn_pr); |
404 | ASSIGN(pvnr_newnode); |
405 | |
406 | break; |
407 | } |
408 | |
409 | case PUFFS_VN_SYMLINK: |
410 | { |
411 | INIT(vnmsg_symlink); |
412 | |
413 | ASSIGN(pvn_pr); |
414 | ASSIGN(pvnr_newnode); |
415 | |
416 | break; |
417 | } |
418 | |
419 | case PUFFS_VN_SETATTR: |
420 | { |
421 | INIT(vnmsg_setattr); |
422 | |
423 | ASSIGN(pvn_pr); |
424 | |
425 | break; |
426 | } |
427 | case PUFFS_VN_GETATTR: |
428 | { |
429 | INIT(vnmsg_getattr); |
430 | |
431 | ASSIGN(pvn_pr); |
432 | vattr_from_50(&cmsg->pvnr_va, &omsg->pvnr_va); |
433 | |
434 | break; |
435 | } |
436 | |
437 | default: |
438 | panic("puffs compat ops come in pairs" ); |
439 | } |
440 | } |
441 | #endif /* COMPAT_50 */ |
442 | } |
443 | |