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Commit | Line | Data |
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9f107513 AL |
1 | /* |
2 | * Virtio 9p backend | |
3 | * | |
4 | * Copyright IBM, Corp. 2010 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include "virtio.h" | |
15 | #include "pc.h" | |
16 | #include "qemu_socket.h" | |
17 | #include "virtio-9p.h" | |
18 | #include "fsdev/qemu-fsdev.h" | |
19 | #include "virtio-9p-debug.h" | |
20 | ||
21 | int dotu = 1; | |
22 | int debug_9p_pdu; | |
23 | ||
fac4f111 VJ |
24 | enum { |
25 | Oread = 0x00, | |
26 | Owrite = 0x01, | |
27 | Ordwr = 0x02, | |
28 | Oexec = 0x03, | |
29 | Oexcl = 0x04, | |
30 | Otrunc = 0x10, | |
31 | Orexec = 0x20, | |
32 | Orclose = 0x40, | |
33 | Oappend = 0x80, | |
34 | }; | |
35 | ||
36 | static int omode_to_uflags(int8_t mode) | |
37 | { | |
38 | int ret = 0; | |
39 | ||
40 | switch (mode & 3) { | |
41 | case Oread: | |
42 | ret = O_RDONLY; | |
43 | break; | |
44 | case Ordwr: | |
45 | ret = O_RDWR; | |
46 | break; | |
47 | case Owrite: | |
48 | ret = O_WRONLY; | |
49 | break; | |
50 | case Oexec: | |
51 | ret = O_RDONLY; | |
52 | break; | |
53 | } | |
54 | ||
55 | if (mode & Otrunc) { | |
56 | ret |= O_TRUNC; | |
57 | } | |
58 | ||
59 | if (mode & Oappend) { | |
60 | ret |= O_APPEND; | |
61 | } | |
62 | ||
63 | if (mode & Oexcl) { | |
64 | ret |= O_EXCL; | |
65 | } | |
66 | ||
67 | return ret; | |
68 | } | |
69 | ||
758e8e38 | 70 | void cred_init(FsCred *credp) |
131dcb25 | 71 | { |
758e8e38 VJ |
72 | credp->fc_uid = -1; |
73 | credp->fc_gid = -1; | |
74 | credp->fc_mode = -1; | |
75 | credp->fc_rdev = -1; | |
131dcb25 AL |
76 | } |
77 | ||
758e8e38 | 78 | static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
131dcb25 | 79 | { |
758e8e38 | 80 | return s->ops->lstat(&s->ctx, path->data, stbuf); |
131dcb25 AL |
81 | } |
82 | ||
83 | static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf) | |
84 | { | |
85 | ssize_t len; | |
86 | ||
87 | buf->data = qemu_malloc(1024); | |
88 | ||
89 | len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1); | |
90 | if (len > -1) { | |
91 | buf->size = len; | |
92 | buf->data[len] = 0; | |
93 | } | |
94 | ||
95 | return len; | |
96 | } | |
97 | ||
98 | static int v9fs_do_close(V9fsState *s, int fd) | |
99 | { | |
100 | return s->ops->close(&s->ctx, fd); | |
101 | } | |
102 | ||
103 | static int v9fs_do_closedir(V9fsState *s, DIR *dir) | |
104 | { | |
105 | return s->ops->closedir(&s->ctx, dir); | |
106 | } | |
107 | ||
a6568fe2 AL |
108 | static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
109 | { | |
110 | return s->ops->open(&s->ctx, path->data, flags); | |
111 | } | |
112 | ||
113 | static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path) | |
114 | { | |
115 | return s->ops->opendir(&s->ctx, path->data); | |
116 | } | |
117 | ||
a9231555 AL |
118 | static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
119 | { | |
120 | return s->ops->rewinddir(&s->ctx, dir); | |
121 | } | |
122 | ||
123 | static off_t v9fs_do_telldir(V9fsState *s, DIR *dir) | |
124 | { | |
125 | return s->ops->telldir(&s->ctx, dir); | |
126 | } | |
127 | ||
128 | static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir) | |
129 | { | |
130 | return s->ops->readdir(&s->ctx, dir); | |
131 | } | |
132 | ||
133 | static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) | |
134 | { | |
135 | return s->ops->seekdir(&s->ctx, dir, off); | |
136 | } | |
137 | ||
138 | static int v9fs_do_readv(V9fsState *s, int fd, const struct iovec *iov, | |
139 | int iovcnt) | |
140 | { | |
141 | return s->ops->readv(&s->ctx, fd, iov, iovcnt); | |
142 | } | |
143 | ||
144 | static off_t v9fs_do_lseek(V9fsState *s, int fd, off_t offset, int whence) | |
145 | { | |
146 | return s->ops->lseek(&s->ctx, fd, offset, whence); | |
147 | } | |
148 | ||
8449360c AL |
149 | static int v9fs_do_writev(V9fsState *s, int fd, const struct iovec *iov, |
150 | int iovcnt) | |
151 | { | |
152 | return s->ops->writev(&s->ctx, fd, iov, iovcnt); | |
153 | } | |
154 | ||
c494dd6f AL |
155 | static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
156 | { | |
e95ead32 VJ |
157 | FsCred cred; |
158 | cred_init(&cred); | |
159 | cred.fc_mode = mode; | |
160 | return s->ops->chmod(&s->ctx, path->data, &cred); | |
c494dd6f AL |
161 | } |
162 | ||
5268cecc MK |
163 | static int v9fs_do_mknod(V9fsState *s, char *name, |
164 | mode_t mode, dev_t dev, uid_t uid, gid_t gid) | |
c494dd6f | 165 | { |
1c293312 VJ |
166 | FsCred cred; |
167 | cred_init(&cred); | |
5268cecc MK |
168 | cred.fc_uid = uid; |
169 | cred.fc_gid = gid; | |
1c293312 VJ |
170 | cred.fc_mode = mode; |
171 | cred.fc_rdev = dev; | |
5268cecc | 172 | return s->ops->mknod(&s->ctx, name, &cred); |
c494dd6f AL |
173 | } |
174 | ||
b67592ea MK |
175 | static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode, |
176 | uid_t uid, gid_t gid) | |
c494dd6f | 177 | { |
00ec5c37 VJ |
178 | FsCred cred; |
179 | ||
180 | cred_init(&cred); | |
b67592ea MK |
181 | cred.fc_uid = uid; |
182 | cred.fc_gid = gid; | |
183 | cred.fc_mode = mode; | |
00ec5c37 | 184 | |
b67592ea | 185 | return s->ops->mkdir(&s->ctx, name, &cred); |
c494dd6f AL |
186 | } |
187 | ||
188 | static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) | |
189 | { | |
190 | return s->ops->fstat(&s->ctx, fd, stbuf); | |
191 | } | |
192 | ||
c1568af5 VJ |
193 | static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid, |
194 | int flags, int mode) | |
c494dd6f | 195 | { |
4750a96f | 196 | FsCred cred; |
4750a96f VJ |
197 | |
198 | cred_init(&cred); | |
c1568af5 VJ |
199 | cred.fc_uid = uid; |
200 | cred.fc_gid = gid; | |
201 | cred.fc_mode = mode & 07777; | |
202 | flags = flags; | |
4750a96f | 203 | |
c1568af5 | 204 | return s->ops->open2(&s->ctx, fullname, flags, &cred); |
c494dd6f AL |
205 | } |
206 | ||
08c60fc9 VJ |
207 | static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
208 | const char *oldpath, const char *newpath, gid_t gid) | |
c494dd6f | 209 | { |
879c2813 VJ |
210 | FsCred cred; |
211 | cred_init(&cred); | |
08c60fc9 VJ |
212 | cred.fc_uid = fidp->uid; |
213 | cred.fc_gid = gid; | |
214 | cred.fc_mode = 0777; | |
879c2813 | 215 | |
08c60fc9 | 216 | return s->ops->symlink(&s->ctx, oldpath, newpath, &cred); |
c494dd6f AL |
217 | } |
218 | ||
219 | static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) | |
220 | { | |
221 | return s->ops->link(&s->ctx, oldpath->data, newpath->data); | |
222 | } | |
223 | ||
8cf89e00 AL |
224 | static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
225 | { | |
226 | return s->ops->truncate(&s->ctx, path->data, size); | |
227 | } | |
228 | ||
229 | static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, | |
230 | V9fsString *newpath) | |
231 | { | |
232 | return s->ops->rename(&s->ctx, oldpath->data, newpath->data); | |
233 | } | |
234 | ||
235 | static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) | |
236 | { | |
f7613bee VJ |
237 | FsCred cred; |
238 | cred_init(&cred); | |
239 | cred.fc_uid = uid; | |
240 | cred.fc_gid = gid; | |
241 | ||
242 | return s->ops->chown(&s->ctx, path->data, &cred); | |
8cf89e00 AL |
243 | } |
244 | ||
8fc39ae4 SK |
245 | static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
246 | const struct timespec times[2]) | |
8cf89e00 | 247 | { |
8fc39ae4 | 248 | return s->ops->utimensat(&s->ctx, path->data, times); |
8cf89e00 AL |
249 | } |
250 | ||
5bae1900 AL |
251 | static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
252 | { | |
253 | return s->ops->remove(&s->ctx, path->data); | |
254 | } | |
255 | ||
8cf89e00 AL |
256 | static int v9fs_do_fsync(V9fsState *s, int fd) |
257 | { | |
258 | return s->ops->fsync(&s->ctx, fd); | |
259 | } | |
260 | ||
5e94c103 MK |
261 | static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
262 | { | |
263 | return s->ops->statfs(&s->ctx, path->data, stbuf); | |
264 | } | |
265 | ||
a03f7874 AL |
266 | static void v9fs_string_init(V9fsString *str) |
267 | { | |
268 | str->data = NULL; | |
269 | str->size = 0; | |
270 | } | |
271 | ||
272 | static void v9fs_string_free(V9fsString *str) | |
273 | { | |
274 | qemu_free(str->data); | |
275 | str->data = NULL; | |
276 | str->size = 0; | |
277 | } | |
278 | ||
279 | static void v9fs_string_null(V9fsString *str) | |
280 | { | |
281 | v9fs_string_free(str); | |
282 | } | |
283 | ||
284 | static int number_to_string(void *arg, char type) | |
285 | { | |
286 | unsigned int ret = 0; | |
287 | ||
288 | switch (type) { | |
289 | case 'u': { | |
290 | unsigned int num = *(unsigned int *)arg; | |
291 | ||
292 | do { | |
293 | ret++; | |
294 | num = num/10; | |
295 | } while (num); | |
296 | break; | |
297 | } | |
298 | default: | |
299 | printf("Number_to_string: Unknown number format\n"); | |
300 | return -1; | |
301 | } | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
306 | static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
307 | { | |
308 | va_list ap2; | |
309 | char *iter = (char *)fmt; | |
310 | int len = 0; | |
311 | int nr_args = 0; | |
312 | char *arg_char_ptr; | |
313 | unsigned int arg_uint; | |
314 | ||
315 | /* Find the number of %'s that denotes an argument */ | |
316 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
317 | nr_args++; | |
318 | iter++; | |
319 | } | |
320 | ||
321 | len = strlen(fmt) - 2*nr_args; | |
322 | ||
323 | if (!nr_args) { | |
324 | goto alloc_print; | |
325 | } | |
326 | ||
327 | va_copy(ap2, ap); | |
328 | ||
329 | iter = (char *)fmt; | |
330 | ||
331 | /* Now parse the format string */ | |
332 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
333 | iter++; | |
334 | switch (*iter) { | |
335 | case 'u': | |
336 | arg_uint = va_arg(ap2, unsigned int); | |
337 | len += number_to_string((void *)&arg_uint, 'u'); | |
338 | break; | |
339 | case 's': | |
340 | arg_char_ptr = va_arg(ap2, char *); | |
341 | len += strlen(arg_char_ptr); | |
342 | break; | |
343 | case 'c': | |
344 | len += 1; | |
345 | break; | |
346 | default: | |
347 | fprintf(stderr, | |
348 | "v9fs_string_alloc_printf:Incorrect format %c", *iter); | |
349 | return -1; | |
350 | } | |
351 | iter++; | |
352 | } | |
353 | ||
354 | alloc_print: | |
355 | *strp = qemu_malloc((len + 1) * sizeof(**strp)); | |
356 | ||
357 | return vsprintf(*strp, fmt, ap); | |
358 | } | |
359 | ||
360 | static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
361 | { | |
362 | va_list ap; | |
363 | int err; | |
364 | ||
365 | v9fs_string_free(str); | |
366 | ||
367 | va_start(ap, fmt); | |
368 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
369 | BUG_ON(err == -1); | |
370 | va_end(ap); | |
371 | ||
372 | str->size = err; | |
373 | } | |
374 | ||
375 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
376 | { | |
377 | v9fs_string_free(lhs); | |
378 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
379 | } | |
380 | ||
381 | static size_t v9fs_string_size(V9fsString *str) | |
382 | { | |
383 | return str->size; | |
384 | } | |
385 | ||
286d5652 AL |
386 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
387 | { | |
388 | V9fsFidState *f; | |
389 | ||
390 | for (f = s->fid_list; f; f = f->next) { | |
391 | if (f->fid == fid) { | |
286d5652 AL |
392 | return f; |
393 | } | |
394 | } | |
395 | ||
396 | return NULL; | |
397 | } | |
398 | ||
399 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
400 | { | |
401 | V9fsFidState *f; | |
402 | ||
403 | f = lookup_fid(s, fid); | |
404 | if (f) { | |
405 | return NULL; | |
406 | } | |
407 | ||
408 | f = qemu_mallocz(sizeof(V9fsFidState)); | |
409 | ||
410 | f->fid = fid; | |
411 | f->fd = -1; | |
412 | f->dir = NULL; | |
413 | ||
414 | f->next = s->fid_list; | |
415 | s->fid_list = f; | |
416 | ||
417 | return f; | |
418 | } | |
419 | ||
420 | static int free_fid(V9fsState *s, int32_t fid) | |
421 | { | |
422 | V9fsFidState **fidpp, *fidp; | |
423 | ||
424 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
425 | if ((*fidpp)->fid == fid) { | |
426 | break; | |
427 | } | |
428 | } | |
429 | ||
430 | if (*fidpp == NULL) { | |
431 | return -ENOENT; | |
432 | } | |
433 | ||
434 | fidp = *fidpp; | |
435 | *fidpp = fidp->next; | |
436 | ||
437 | if (fidp->fd != -1) { | |
438 | v9fs_do_close(s, fidp->fd); | |
439 | } | |
440 | if (fidp->dir) { | |
441 | v9fs_do_closedir(s, fidp->dir); | |
442 | } | |
443 | v9fs_string_free(&fidp->path); | |
444 | qemu_free(fidp); | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | #define P9_QID_TYPE_DIR 0x80 | |
450 | #define P9_QID_TYPE_SYMLINK 0x02 | |
451 | ||
452 | #define P9_STAT_MODE_DIR 0x80000000 | |
453 | #define P9_STAT_MODE_APPEND 0x40000000 | |
454 | #define P9_STAT_MODE_EXCL 0x20000000 | |
455 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
456 | #define P9_STAT_MODE_AUTH 0x08000000 | |
457 | #define P9_STAT_MODE_TMP 0x04000000 | |
458 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
459 | #define P9_STAT_MODE_LINK 0x01000000 | |
460 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
461 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
462 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
463 | #define P9_STAT_MODE_SETUID 0x00080000 | |
464 | #define P9_STAT_MODE_SETGID 0x00040000 | |
465 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
466 | ||
467 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
468 | P9_STAT_MODE_SYMLINK | \ | |
469 | P9_STAT_MODE_LINK | \ | |
470 | P9_STAT_MODE_DEVICE | \ | |
471 | P9_STAT_MODE_NAMED_PIPE | \ | |
472 | P9_STAT_MODE_SOCKET) | |
473 | ||
474 | /* This is the algorithm from ufs in spfs */ | |
475 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
476 | { | |
477 | size_t size; | |
478 | ||
479 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
480 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
481 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
482 | qidp->type = 0; | |
483 | if (S_ISDIR(stbuf->st_mode)) { | |
484 | qidp->type |= P9_QID_TYPE_DIR; | |
485 | } | |
486 | if (S_ISLNK(stbuf->st_mode)) { | |
487 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
488 | } | |
489 | } | |
490 | ||
491 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
492 | { | |
493 | struct stat stbuf; | |
494 | int err; | |
495 | ||
496 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
497 | if (err) { | |
498 | return err; | |
499 | } | |
500 | ||
501 | stat_to_qid(&stbuf, qidp); | |
502 | return 0; | |
503 | } | |
504 | ||
9f107513 AL |
505 | static V9fsPDU *alloc_pdu(V9fsState *s) |
506 | { | |
507 | V9fsPDU *pdu = NULL; | |
508 | ||
509 | if (!QLIST_EMPTY(&s->free_list)) { | |
510 | pdu = QLIST_FIRST(&s->free_list); | |
511 | QLIST_REMOVE(pdu, next); | |
512 | } | |
513 | return pdu; | |
514 | } | |
515 | ||
516 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
517 | { | |
518 | if (pdu) { | |
519 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
520 | } | |
521 | } | |
522 | ||
523 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
524 | size_t offset, size_t size, int pack) | |
525 | { | |
526 | int i = 0; | |
527 | size_t copied = 0; | |
528 | ||
529 | for (i = 0; size && i < sg_count; i++) { | |
530 | size_t len; | |
531 | if (offset >= sg[i].iov_len) { | |
532 | /* skip this sg */ | |
533 | offset -= sg[i].iov_len; | |
534 | continue; | |
535 | } else { | |
536 | len = MIN(sg[i].iov_len - offset, size); | |
537 | if (pack) { | |
538 | memcpy(sg[i].iov_base + offset, addr, len); | |
539 | } else { | |
540 | memcpy(addr, sg[i].iov_base + offset, len); | |
541 | } | |
542 | size -= len; | |
543 | copied += len; | |
544 | addr += len; | |
545 | if (size) { | |
546 | offset = 0; | |
547 | continue; | |
548 | } | |
549 | } | |
550 | } | |
551 | ||
552 | return copied; | |
553 | } | |
554 | ||
405a549a AL |
555 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
556 | { | |
557 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
558 | offset, size, 0); | |
559 | } | |
560 | ||
561 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
562 | size_t size) | |
563 | { | |
564 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
565 | offset, size, 1); | |
566 | } | |
567 | ||
568 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
569 | { | |
570 | size_t pos = 0; | |
571 | int i, j; | |
572 | struct iovec *src_sg; | |
573 | unsigned int num; | |
574 | ||
575 | if (rx) { | |
576 | src_sg = pdu->elem.in_sg; | |
577 | num = pdu->elem.in_num; | |
578 | } else { | |
579 | src_sg = pdu->elem.out_sg; | |
580 | num = pdu->elem.out_num; | |
581 | } | |
582 | ||
583 | j = 0; | |
584 | for (i = 0; i < num; i++) { | |
585 | if (offset <= pos) { | |
586 | sg[j].iov_base = src_sg[i].iov_base; | |
587 | sg[j].iov_len = src_sg[i].iov_len; | |
588 | j++; | |
589 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
590 | sg[j].iov_base = src_sg[i].iov_base; | |
591 | sg[j].iov_len = src_sg[i].iov_len; | |
592 | sg[j].iov_base += (offset - pos); | |
593 | sg[j].iov_len -= (offset - pos); | |
594 | j++; | |
595 | } | |
596 | pos += src_sg[i].iov_len; | |
597 | } | |
598 | ||
599 | return j; | |
600 | } | |
601 | ||
602 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
603 | { | |
604 | size_t old_offset = offset; | |
605 | va_list ap; | |
606 | int i; | |
607 | ||
608 | va_start(ap, fmt); | |
609 | for (i = 0; fmt[i]; i++) { | |
610 | switch (fmt[i]) { | |
611 | case 'b': { | |
612 | uint8_t *valp = va_arg(ap, uint8_t *); | |
613 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
614 | break; | |
615 | } | |
616 | case 'w': { | |
617 | uint16_t val, *valp; | |
618 | valp = va_arg(ap, uint16_t *); | |
619 | val = le16_to_cpupu(valp); | |
620 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
621 | *valp = val; | |
622 | break; | |
623 | } | |
624 | case 'd': { | |
625 | uint32_t val, *valp; | |
626 | valp = va_arg(ap, uint32_t *); | |
627 | val = le32_to_cpupu(valp); | |
628 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
629 | *valp = val; | |
630 | break; | |
631 | } | |
632 | case 'q': { | |
633 | uint64_t val, *valp; | |
634 | valp = va_arg(ap, uint64_t *); | |
635 | val = le64_to_cpup(valp); | |
636 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
637 | *valp = val; | |
638 | break; | |
639 | } | |
640 | case 'v': { | |
641 | struct iovec *iov = va_arg(ap, struct iovec *); | |
642 | int *iovcnt = va_arg(ap, int *); | |
643 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
644 | break; | |
645 | } | |
646 | case 's': { | |
647 | V9fsString *str = va_arg(ap, V9fsString *); | |
648 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
649 | /* FIXME: sanity check str->size */ | |
650 | str->data = qemu_malloc(str->size + 1); | |
651 | offset += pdu_unpack(str->data, pdu, offset, str->size); | |
652 | str->data[str->size] = 0; | |
653 | break; | |
654 | } | |
655 | case 'Q': { | |
656 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
657 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
658 | &qidp->type, &qidp->version, &qidp->path); | |
659 | break; | |
660 | } | |
661 | case 'S': { | |
662 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
663 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
664 | &statp->size, &statp->type, &statp->dev, | |
665 | &statp->qid, &statp->mode, &statp->atime, | |
666 | &statp->mtime, &statp->length, | |
667 | &statp->name, &statp->uid, &statp->gid, | |
668 | &statp->muid, &statp->extension, | |
669 | &statp->n_uid, &statp->n_gid, | |
670 | &statp->n_muid); | |
671 | break; | |
672 | } | |
c79ce737 SK |
673 | case 'I': { |
674 | V9fsIattr *iattr = va_arg(ap, V9fsIattr *); | |
675 | offset += pdu_unmarshal(pdu, offset, "ddddqqqqq", | |
676 | &iattr->valid, &iattr->mode, | |
677 | &iattr->uid, &iattr->gid, &iattr->size, | |
678 | &iattr->atime_sec, &iattr->atime_nsec, | |
679 | &iattr->mtime_sec, &iattr->mtime_nsec); | |
680 | break; | |
681 | } | |
405a549a AL |
682 | default: |
683 | break; | |
684 | } | |
685 | } | |
686 | ||
687 | va_end(ap); | |
688 | ||
689 | return offset - old_offset; | |
690 | } | |
691 | ||
692 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
693 | { | |
694 | size_t old_offset = offset; | |
695 | va_list ap; | |
696 | int i; | |
697 | ||
698 | va_start(ap, fmt); | |
699 | for (i = 0; fmt[i]; i++) { | |
700 | switch (fmt[i]) { | |
701 | case 'b': { | |
702 | uint8_t val = va_arg(ap, int); | |
703 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
704 | break; | |
705 | } | |
706 | case 'w': { | |
707 | uint16_t val; | |
708 | cpu_to_le16w(&val, va_arg(ap, int)); | |
709 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
710 | break; | |
711 | } | |
712 | case 'd': { | |
713 | uint32_t val; | |
714 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
715 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
716 | break; | |
717 | } | |
718 | case 'q': { | |
719 | uint64_t val; | |
720 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
721 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
722 | break; | |
723 | } | |
724 | case 'v': { | |
725 | struct iovec *iov = va_arg(ap, struct iovec *); | |
726 | int *iovcnt = va_arg(ap, int *); | |
727 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
728 | break; | |
729 | } | |
730 | case 's': { | |
731 | V9fsString *str = va_arg(ap, V9fsString *); | |
732 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
733 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
734 | break; | |
735 | } | |
736 | case 'Q': { | |
737 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
738 | offset += pdu_marshal(pdu, offset, "bdq", | |
739 | qidp->type, qidp->version, qidp->path); | |
740 | break; | |
741 | } | |
742 | case 'S': { | |
743 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
744 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
745 | statp->size, statp->type, statp->dev, | |
746 | &statp->qid, statp->mode, statp->atime, | |
747 | statp->mtime, statp->length, &statp->name, | |
748 | &statp->uid, &statp->gid, &statp->muid, | |
749 | &statp->extension, statp->n_uid, | |
750 | statp->n_gid, statp->n_muid); | |
751 | break; | |
752 | } | |
00ede4c2 SK |
753 | case 'A': { |
754 | V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); | |
755 | offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq", | |
756 | statp->st_result_mask, | |
757 | &statp->qid, statp->st_mode, | |
758 | statp->st_uid, statp->st_gid, | |
759 | statp->st_nlink, statp->st_rdev, | |
760 | statp->st_size, statp->st_blksize, statp->st_blocks, | |
761 | statp->st_atime_sec, statp->st_atime_nsec, | |
762 | statp->st_mtime_sec, statp->st_mtime_nsec, | |
763 | statp->st_ctime_sec, statp->st_ctime_nsec, | |
764 | statp->st_btime_sec, statp->st_btime_nsec, | |
765 | statp->st_gen, statp->st_data_version); | |
766 | break; | |
767 | } | |
405a549a AL |
768 | default: |
769 | break; | |
770 | } | |
771 | } | |
772 | va_end(ap); | |
773 | ||
774 | return offset - old_offset; | |
775 | } | |
776 | ||
777 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
778 | { | |
779 | int8_t id = pdu->id + 1; /* Response */ | |
780 | ||
781 | if (len < 0) { | |
782 | V9fsString str; | |
783 | int err = -len; | |
784 | ||
785 | str.data = strerror(err); | |
786 | str.size = strlen(str.data); | |
787 | ||
788 | len = 7; | |
789 | len += pdu_marshal(pdu, len, "s", &str); | |
790 | if (dotu) { | |
791 | len += pdu_marshal(pdu, len, "d", err); | |
792 | } | |
793 | ||
794 | id = P9_RERROR; | |
795 | } | |
796 | ||
797 | /* fill out the header */ | |
798 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
799 | ||
800 | /* keep these in sync */ | |
801 | pdu->size = len; | |
802 | pdu->id = id; | |
803 | ||
804 | /* push onto queue and notify */ | |
805 | virtqueue_push(s->vq, &pdu->elem, len); | |
806 | ||
807 | /* FIXME: we should batch these completions */ | |
808 | virtio_notify(&s->vdev, s->vq); | |
809 | ||
810 | free_pdu(s, pdu); | |
811 | } | |
812 | ||
bb9e3216 AL |
813 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
814 | { | |
815 | mode_t ret; | |
816 | ||
817 | ret = mode & 0777; | |
818 | if (mode & P9_STAT_MODE_DIR) { | |
819 | ret |= S_IFDIR; | |
820 | } | |
821 | ||
822 | if (dotu) { | |
823 | if (mode & P9_STAT_MODE_SYMLINK) { | |
824 | ret |= S_IFLNK; | |
825 | } | |
826 | if (mode & P9_STAT_MODE_SOCKET) { | |
827 | ret |= S_IFSOCK; | |
828 | } | |
829 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
830 | ret |= S_IFIFO; | |
831 | } | |
832 | if (mode & P9_STAT_MODE_DEVICE) { | |
833 | if (extension && extension->data[0] == 'c') { | |
834 | ret |= S_IFCHR; | |
835 | } else { | |
836 | ret |= S_IFBLK; | |
837 | } | |
838 | } | |
839 | } | |
840 | ||
841 | if (!(ret&~0777)) { | |
842 | ret |= S_IFREG; | |
843 | } | |
844 | ||
845 | if (mode & P9_STAT_MODE_SETUID) { | |
846 | ret |= S_ISUID; | |
847 | } | |
848 | if (mode & P9_STAT_MODE_SETGID) { | |
849 | ret |= S_ISGID; | |
850 | } | |
851 | if (mode & P9_STAT_MODE_SETVTX) { | |
852 | ret |= S_ISVTX; | |
853 | } | |
854 | ||
855 | return ret; | |
856 | } | |
857 | ||
858 | static int donttouch_stat(V9fsStat *stat) | |
859 | { | |
860 | if (stat->type == -1 && | |
861 | stat->dev == -1 && | |
862 | stat->qid.type == -1 && | |
863 | stat->qid.version == -1 && | |
864 | stat->qid.path == -1 && | |
865 | stat->mode == -1 && | |
866 | stat->atime == -1 && | |
867 | stat->mtime == -1 && | |
868 | stat->length == -1 && | |
869 | !stat->name.size && | |
870 | !stat->uid.size && | |
871 | !stat->gid.size && | |
872 | !stat->muid.size && | |
873 | stat->n_uid == -1 && | |
874 | stat->n_gid == -1 && | |
875 | stat->n_muid == -1) { | |
876 | return 1; | |
877 | } | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | static void v9fs_stat_free(V9fsStat *stat) | |
883 | { | |
884 | v9fs_string_free(&stat->name); | |
885 | v9fs_string_free(&stat->uid); | |
886 | v9fs_string_free(&stat->gid); | |
887 | v9fs_string_free(&stat->muid); | |
888 | v9fs_string_free(&stat->extension); | |
889 | } | |
890 | ||
891 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
892 | { | |
893 | uint32_t mode; | |
894 | ||
895 | mode = stbuf->st_mode & 0777; | |
896 | if (S_ISDIR(stbuf->st_mode)) { | |
897 | mode |= P9_STAT_MODE_DIR; | |
898 | } | |
899 | ||
900 | if (dotu) { | |
901 | if (S_ISLNK(stbuf->st_mode)) { | |
902 | mode |= P9_STAT_MODE_SYMLINK; | |
903 | } | |
904 | ||
905 | if (S_ISSOCK(stbuf->st_mode)) { | |
906 | mode |= P9_STAT_MODE_SOCKET; | |
907 | } | |
908 | ||
909 | if (S_ISFIFO(stbuf->st_mode)) { | |
910 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
911 | } | |
912 | ||
913 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { | |
914 | mode |= P9_STAT_MODE_DEVICE; | |
915 | } | |
916 | ||
917 | if (stbuf->st_mode & S_ISUID) { | |
918 | mode |= P9_STAT_MODE_SETUID; | |
919 | } | |
920 | ||
921 | if (stbuf->st_mode & S_ISGID) { | |
922 | mode |= P9_STAT_MODE_SETGID; | |
923 | } | |
924 | ||
925 | if (stbuf->st_mode & S_ISVTX) { | |
926 | mode |= P9_STAT_MODE_SETVTX; | |
927 | } | |
928 | } | |
929 | ||
930 | return mode; | |
931 | } | |
932 | ||
933 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
934 | const struct stat *stbuf, | |
935 | V9fsStat *v9stat) | |
936 | { | |
937 | int err; | |
938 | const char *str; | |
939 | ||
940 | memset(v9stat, 0, sizeof(*v9stat)); | |
941 | ||
942 | stat_to_qid(stbuf, &v9stat->qid); | |
943 | v9stat->mode = stat_to_v9mode(stbuf); | |
944 | v9stat->atime = stbuf->st_atime; | |
945 | v9stat->mtime = stbuf->st_mtime; | |
946 | v9stat->length = stbuf->st_size; | |
947 | ||
948 | v9fs_string_null(&v9stat->uid); | |
949 | v9fs_string_null(&v9stat->gid); | |
950 | v9fs_string_null(&v9stat->muid); | |
951 | ||
952 | if (dotu) { | |
953 | v9stat->n_uid = stbuf->st_uid; | |
954 | v9stat->n_gid = stbuf->st_gid; | |
955 | v9stat->n_muid = 0; | |
956 | ||
957 | v9fs_string_null(&v9stat->extension); | |
958 | ||
959 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { | |
960 | err = v9fs_do_readlink(s, name, &v9stat->extension); | |
961 | if (err == -1) { | |
962 | err = -errno; | |
963 | return err; | |
964 | } | |
965 | v9stat->extension.data[err] = 0; | |
966 | v9stat->extension.size = err; | |
967 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { | |
968 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
969 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
970 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
971 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
972 | v9fs_string_sprintf(&v9stat->extension, "%s %u", | |
973 | "HARDLINKCOUNT", stbuf->st_nlink); | |
974 | } | |
975 | } | |
976 | ||
977 | str = strrchr(name->data, '/'); | |
978 | if (str) { | |
979 | str += 1; | |
980 | } else { | |
981 | str = name->data; | |
982 | } | |
983 | ||
984 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
985 | ||
986 | v9stat->size = 61 + | |
987 | v9fs_string_size(&v9stat->name) + | |
988 | v9fs_string_size(&v9stat->uid) + | |
989 | v9fs_string_size(&v9stat->gid) + | |
990 | v9fs_string_size(&v9stat->muid) + | |
991 | v9fs_string_size(&v9stat->extension); | |
992 | return 0; | |
993 | } | |
994 | ||
00ede4c2 SK |
995 | #define P9_STATS_MODE 0x00000001ULL |
996 | #define P9_STATS_NLINK 0x00000002ULL | |
997 | #define P9_STATS_UID 0x00000004ULL | |
998 | #define P9_STATS_GID 0x00000008ULL | |
999 | #define P9_STATS_RDEV 0x00000010ULL | |
1000 | #define P9_STATS_ATIME 0x00000020ULL | |
1001 | #define P9_STATS_MTIME 0x00000040ULL | |
1002 | #define P9_STATS_CTIME 0x00000080ULL | |
1003 | #define P9_STATS_INO 0x00000100ULL | |
1004 | #define P9_STATS_SIZE 0x00000200ULL | |
1005 | #define P9_STATS_BLOCKS 0x00000400ULL | |
1006 | ||
1007 | #define P9_STATS_BTIME 0x00000800ULL | |
1008 | #define P9_STATS_GEN 0x00001000ULL | |
1009 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
1010 | ||
1011 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
1012 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
1013 | ||
1014 | ||
1015 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, | |
1016 | V9fsStatDotl *v9lstat) | |
1017 | { | |
1018 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
1019 | ||
1020 | v9lstat->st_mode = stbuf->st_mode; | |
1021 | v9lstat->st_nlink = stbuf->st_nlink; | |
1022 | v9lstat->st_uid = stbuf->st_uid; | |
1023 | v9lstat->st_gid = stbuf->st_gid; | |
1024 | v9lstat->st_rdev = stbuf->st_rdev; | |
1025 | v9lstat->st_size = stbuf->st_size; | |
1026 | v9lstat->st_blksize = stbuf->st_blksize; | |
1027 | v9lstat->st_blocks = stbuf->st_blocks; | |
1028 | v9lstat->st_atime_sec = stbuf->st_atime; | |
1029 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
1030 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
1031 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
1032 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
1033 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
1034 | /* Currently we only support BASIC fields in stat */ | |
1035 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
1036 | ||
1037 | stat_to_qid(stbuf, &v9lstat->qid); | |
1038 | } | |
1039 | ||
1f5a89bf AL |
1040 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1041 | { | |
1042 | while (len && *iovcnt) { | |
1043 | if (len < sg->iov_len) { | |
1044 | sg->iov_len -= len; | |
1045 | sg->iov_base += len; | |
1046 | len = 0; | |
1047 | } else { | |
1048 | len -= sg->iov_len; | |
1049 | sg++; | |
1050 | *iovcnt -= 1; | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | return sg; | |
1055 | } | |
1056 | ||
1057 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
1058 | { | |
1059 | int i; | |
1060 | int total = 0; | |
1061 | ||
1062 | for (i = 0; i < *cnt; i++) { | |
1063 | if ((total + sg[i].iov_len) > cap) { | |
1064 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
1065 | i++; | |
1066 | break; | |
1067 | } | |
1068 | total += sg[i].iov_len; | |
1069 | } | |
1070 | ||
1071 | *cnt = i; | |
1072 | ||
1073 | return sg; | |
1074 | } | |
1075 | ||
1076 | static void print_sg(struct iovec *sg, int cnt) | |
1077 | { | |
1078 | int i; | |
1079 | ||
1080 | printf("sg[%d]: {", cnt); | |
1081 | for (i = 0; i < cnt; i++) { | |
1082 | if (i) { | |
1083 | printf(", "); | |
1084 | } | |
1085 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1086 | } | |
1087 | printf("}\n"); | |
1088 | } | |
1089 | ||
8cf89e00 AL |
1090 | static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1091 | { | |
1092 | V9fsString str; | |
1093 | v9fs_string_init(&str); | |
1094 | v9fs_string_copy(&str, dst); | |
1095 | v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len); | |
1096 | v9fs_string_free(&str); | |
1097 | } | |
1098 | ||
9f107513 AL |
1099 | static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1100 | { | |
92c1ad03 AL |
1101 | V9fsString version; |
1102 | size_t offset = 7; | |
1103 | ||
5e94c103 | 1104 | pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); |
92c1ad03 | 1105 | |
84151514 MK |
1106 | if (!strcmp(version.data, "9P2000.u")) { |
1107 | s->proto_version = V9FS_PROTO_2000U; | |
1108 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1109 | s->proto_version = V9FS_PROTO_2000L; | |
1110 | } else { | |
92c1ad03 | 1111 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 1112 | } |
92c1ad03 | 1113 | |
5e94c103 | 1114 | offset += pdu_marshal(pdu, offset, "ds", s->msize, &version); |
92c1ad03 AL |
1115 | complete_pdu(s, pdu, offset); |
1116 | ||
1117 | v9fs_string_free(&version); | |
9f107513 AL |
1118 | } |
1119 | ||
1120 | static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) | |
1121 | { | |
955efc47 AL |
1122 | int32_t fid, afid, n_uname; |
1123 | V9fsString uname, aname; | |
1124 | V9fsFidState *fidp; | |
1125 | V9fsQID qid; | |
1126 | size_t offset = 7; | |
1127 | ssize_t err; | |
1128 | ||
1129 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
1130 | ||
1131 | fidp = alloc_fid(s, fid); | |
1132 | if (fidp == NULL) { | |
1133 | err = -EINVAL; | |
1134 | goto out; | |
9f107513 | 1135 | } |
955efc47 AL |
1136 | |
1137 | fidp->uid = n_uname; | |
1138 | ||
1139 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
1140 | err = fid_to_qid(s, fidp, &qid); | |
1141 | if (err) { | |
1142 | err = -EINVAL; | |
1143 | free_fid(s, fid); | |
1144 | goto out; | |
1145 | } | |
1146 | ||
1147 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
1148 | ||
1149 | err = offset; | |
1150 | out: | |
1151 | complete_pdu(s, pdu, err); | |
1152 | v9fs_string_free(&uname); | |
1153 | v9fs_string_free(&aname); | |
9f107513 AL |
1154 | } |
1155 | ||
4da7d3fa AL |
1156 | static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1157 | { | |
1158 | if (err == -1) { | |
1159 | err = -errno; | |
1160 | goto out; | |
1161 | } | |
1162 | ||
1163 | err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); | |
1164 | if (err) { | |
1165 | goto out; | |
1166 | } | |
1167 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); | |
1168 | err = vs->offset; | |
1169 | ||
1170 | out: | |
1171 | complete_pdu(s, vs->pdu, err); | |
1172 | v9fs_stat_free(&vs->v9stat); | |
1173 | qemu_free(vs); | |
1174 | } | |
1175 | ||
9f107513 AL |
1176 | static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1177 | { | |
4da7d3fa AL |
1178 | int32_t fid; |
1179 | V9fsStatState *vs; | |
1180 | ssize_t err = 0; | |
1181 | ||
1182 | vs = qemu_malloc(sizeof(*vs)); | |
1183 | vs->pdu = pdu; | |
1184 | vs->offset = 7; | |
1185 | ||
1186 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1187 | ||
1188 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1189 | ||
1190 | vs->fidp = lookup_fid(s, fid); | |
1191 | if (vs->fidp == NULL) { | |
1192 | err = -ENOENT; | |
1193 | goto out; | |
9f107513 | 1194 | } |
4da7d3fa AL |
1195 | |
1196 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1197 | v9fs_stat_post_lstat(s, vs, err); | |
1198 | return; | |
1199 | ||
1200 | out: | |
1201 | complete_pdu(s, vs->pdu, err); | |
1202 | v9fs_stat_free(&vs->v9stat); | |
1203 | qemu_free(vs); | |
9f107513 AL |
1204 | } |
1205 | ||
00ede4c2 SK |
1206 | static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs, |
1207 | int err) | |
1208 | { | |
1209 | if (err == -1) { | |
1210 | err = -errno; | |
1211 | goto out; | |
1212 | } | |
1213 | ||
1214 | stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl); | |
1215 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl); | |
1216 | err = vs->offset; | |
1217 | ||
1218 | out: | |
1219 | complete_pdu(s, vs->pdu, err); | |
1220 | qemu_free(vs); | |
1221 | } | |
1222 | ||
1223 | static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu) | |
1224 | { | |
1225 | int32_t fid; | |
1226 | V9fsStatStateDotl *vs; | |
1227 | ssize_t err = 0; | |
1228 | V9fsFidState *fidp; | |
1229 | uint64_t request_mask; | |
1230 | ||
1231 | vs = qemu_malloc(sizeof(*vs)); | |
1232 | vs->pdu = pdu; | |
1233 | vs->offset = 7; | |
1234 | ||
1235 | memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl)); | |
1236 | ||
1237 | pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask); | |
1238 | ||
1239 | fidp = lookup_fid(s, fid); | |
1240 | if (fidp == NULL) { | |
1241 | err = -ENOENT; | |
1242 | goto out; | |
1243 | } | |
1244 | ||
1245 | /* Currently we only support BASIC fields in stat, so there is no | |
1246 | * need to look at request_mask. | |
1247 | */ | |
1248 | err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf); | |
1249 | v9fs_getattr_post_lstat(s, vs, err); | |
1250 | return; | |
1251 | ||
1252 | out: | |
1253 | complete_pdu(s, vs->pdu, err); | |
1254 | qemu_free(vs); | |
1255 | } | |
1256 | ||
c79ce737 SK |
1257 | /* From Linux kernel code */ |
1258 | #define ATTR_MODE (1 << 0) | |
1259 | #define ATTR_UID (1 << 1) | |
1260 | #define ATTR_GID (1 << 2) | |
1261 | #define ATTR_SIZE (1 << 3) | |
1262 | #define ATTR_ATIME (1 << 4) | |
1263 | #define ATTR_MTIME (1 << 5) | |
1264 | #define ATTR_CTIME (1 << 6) | |
1265 | #define ATTR_MASK 127 | |
1266 | #define ATTR_ATIME_SET (1 << 7) | |
1267 | #define ATTR_MTIME_SET (1 << 8) | |
1268 | ||
1269 | static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs, | |
1270 | int err) | |
1271 | { | |
1272 | if (err == -1) { | |
1273 | err = -errno; | |
1274 | goto out; | |
1275 | } | |
1276 | err = vs->offset; | |
1277 | ||
1278 | out: | |
1279 | complete_pdu(s, vs->pdu, err); | |
1280 | qemu_free(vs); | |
1281 | } | |
1282 | ||
1283 | static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err) | |
1284 | { | |
1285 | if (err == -1) { | |
1286 | err = -errno; | |
1287 | goto out; | |
1288 | } | |
1289 | ||
1290 | if (vs->v9iattr.valid & (ATTR_SIZE)) { | |
1291 | err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size); | |
1292 | } | |
1293 | v9fs_setattr_post_truncate(s, vs, err); | |
1294 | return; | |
1295 | ||
1296 | out: | |
1297 | complete_pdu(s, vs->pdu, err); | |
1298 | qemu_free(vs); | |
1299 | } | |
1300 | ||
1301 | static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs, | |
1302 | int err) | |
1303 | { | |
1304 | if (err == -1) { | |
1305 | err = -errno; | |
1306 | goto out; | |
1307 | } | |
1308 | ||
1309 | /* If the only valid entry in iattr is ctime we can call | |
1310 | * chown(-1,-1) to update the ctime of the file | |
1311 | */ | |
1312 | if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) || | |
1313 | ((vs->v9iattr.valid & ATTR_CTIME) | |
1314 | && !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { | |
1315 | if (!(vs->v9iattr.valid & ATTR_UID)) { | |
1316 | vs->v9iattr.uid = -1; | |
1317 | } | |
1318 | if (!(vs->v9iattr.valid & ATTR_GID)) { | |
1319 | vs->v9iattr.gid = -1; | |
1320 | } | |
1321 | err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid, | |
1322 | vs->v9iattr.gid); | |
1323 | } | |
1324 | v9fs_setattr_post_chown(s, vs, err); | |
1325 | return; | |
1326 | ||
1327 | out: | |
1328 | complete_pdu(s, vs->pdu, err); | |
1329 | qemu_free(vs); | |
1330 | } | |
1331 | ||
1332 | static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err) | |
1333 | { | |
1334 | if (err == -1) { | |
1335 | err = -errno; | |
1336 | goto out; | |
1337 | } | |
1338 | ||
1339 | if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) { | |
1340 | struct timespec times[2]; | |
1341 | if (vs->v9iattr.valid & ATTR_ATIME) { | |
1342 | if (vs->v9iattr.valid & ATTR_ATIME_SET) { | |
1343 | times[0].tv_sec = vs->v9iattr.atime_sec; | |
1344 | times[0].tv_nsec = vs->v9iattr.atime_nsec; | |
1345 | } else { | |
1346 | times[0].tv_nsec = UTIME_NOW; | |
1347 | } | |
1348 | } else { | |
1349 | times[0].tv_nsec = UTIME_OMIT; | |
1350 | } | |
1351 | ||
1352 | if (vs->v9iattr.valid & ATTR_MTIME) { | |
1353 | if (vs->v9iattr.valid & ATTR_MTIME_SET) { | |
1354 | times[1].tv_sec = vs->v9iattr.mtime_sec; | |
1355 | times[1].tv_nsec = vs->v9iattr.mtime_nsec; | |
1356 | } else { | |
1357 | times[1].tv_nsec = UTIME_NOW; | |
1358 | } | |
1359 | } else { | |
1360 | times[1].tv_nsec = UTIME_OMIT; | |
1361 | } | |
1362 | err = v9fs_do_utimensat(s, &vs->fidp->path, times); | |
1363 | } | |
1364 | v9fs_setattr_post_utimensat(s, vs, err); | |
1365 | return; | |
1366 | ||
1367 | out: | |
1368 | complete_pdu(s, vs->pdu, err); | |
1369 | qemu_free(vs); | |
1370 | } | |
1371 | ||
1372 | static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu) | |
1373 | { | |
1374 | int32_t fid; | |
1375 | V9fsSetattrState *vs; | |
1376 | int err = 0; | |
1377 | ||
1378 | vs = qemu_malloc(sizeof(*vs)); | |
1379 | vs->pdu = pdu; | |
1380 | vs->offset = 7; | |
1381 | ||
1382 | pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr); | |
1383 | ||
1384 | vs->fidp = lookup_fid(s, fid); | |
1385 | if (vs->fidp == NULL) { | |
1386 | err = -EINVAL; | |
1387 | goto out; | |
1388 | } | |
1389 | ||
1390 | if (vs->v9iattr.valid & ATTR_MODE) { | |
1391 | err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode); | |
1392 | } | |
1393 | ||
1394 | v9fs_setattr_post_chmod(s, vs, err); | |
1395 | return; | |
1396 | ||
1397 | out: | |
1398 | complete_pdu(s, vs->pdu, err); | |
1399 | qemu_free(vs); | |
1400 | } | |
1401 | ||
ff5e54c9 AL |
1402 | static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1403 | { | |
1404 | complete_pdu(s, vs->pdu, err); | |
1405 | ||
1406 | if (vs->nwnames) { | |
1407 | for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { | |
1408 | v9fs_string_free(&vs->wnames[vs->name_idx]); | |
1409 | } | |
1410 | ||
1411 | qemu_free(vs->wnames); | |
1412 | qemu_free(vs->qids); | |
1413 | } | |
1414 | } | |
1415 | ||
1416 | static void v9fs_walk_marshal(V9fsWalkState *vs) | |
1417 | { | |
1418 | int i; | |
1419 | vs->offset = 7; | |
1420 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames); | |
1421 | ||
1422 | for (i = 0; i < vs->nwnames; i++) { | |
1423 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]); | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1428 | int err) | |
1429 | { | |
1430 | if (err == -1) { | |
1431 | free_fid(s, vs->newfidp->fid); | |
1432 | v9fs_string_free(&vs->path); | |
1433 | err = -ENOENT; | |
1434 | goto out; | |
1435 | } | |
1436 | ||
1437 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1438 | ||
1439 | vs->name_idx++; | |
1440 | if (vs->name_idx < vs->nwnames) { | |
1441 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1442 | vs->wnames[vs->name_idx].data); | |
1443 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1444 | ||
1445 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1446 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1447 | return; | |
1448 | } | |
1449 | ||
1450 | v9fs_string_free(&vs->path); | |
1451 | v9fs_walk_marshal(vs); | |
1452 | err = vs->offset; | |
1453 | out: | |
1454 | v9fs_walk_complete(s, vs, err); | |
1455 | } | |
1456 | ||
1457 | static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1458 | int err) | |
1459 | { | |
1460 | if (err == -1) { | |
1461 | v9fs_string_free(&vs->path); | |
1462 | err = -ENOENT; | |
1463 | goto out; | |
1464 | } | |
1465 | ||
1466 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1467 | vs->name_idx++; | |
1468 | if (vs->name_idx < vs->nwnames) { | |
1469 | ||
1470 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1471 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1472 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1473 | ||
1474 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1475 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1476 | return; | |
1477 | } | |
1478 | ||
1479 | v9fs_string_free(&vs->path); | |
1480 | v9fs_walk_marshal(vs); | |
1481 | err = vs->offset; | |
1482 | out: | |
1483 | v9fs_walk_complete(s, vs, err); | |
1484 | } | |
1485 | ||
9f107513 AL |
1486 | static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1487 | { | |
ff5e54c9 AL |
1488 | int32_t fid, newfid; |
1489 | V9fsWalkState *vs; | |
1490 | int err = 0; | |
1491 | int i; | |
1492 | ||
1493 | vs = qemu_malloc(sizeof(*vs)); | |
1494 | vs->pdu = pdu; | |
1495 | vs->wnames = NULL; | |
1496 | vs->qids = NULL; | |
1497 | vs->offset = 7; | |
1498 | ||
1499 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid, | |
1500 | &newfid, &vs->nwnames); | |
1501 | ||
1502 | if (vs->nwnames) { | |
1503 | vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); | |
1504 | ||
1505 | vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); | |
1506 | ||
1507 | for (i = 0; i < vs->nwnames; i++) { | |
1508 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s", | |
1509 | &vs->wnames[i]); | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | vs->fidp = lookup_fid(s, fid); | |
1514 | if (vs->fidp == NULL) { | |
1515 | err = -ENOENT; | |
1516 | goto out; | |
1517 | } | |
1518 | ||
1519 | /* FIXME: is this really valid? */ | |
1520 | if (fid == newfid) { | |
1521 | ||
1522 | BUG_ON(vs->fidp->fd != -1); | |
1523 | BUG_ON(vs->fidp->dir); | |
1524 | v9fs_string_init(&vs->path); | |
1525 | vs->name_idx = 0; | |
1526 | ||
1527 | if (vs->name_idx < vs->nwnames) { | |
1528 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1529 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1530 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1531 | ||
1532 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1533 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1534 | return; | |
1535 | } | |
1536 | } else { | |
1537 | vs->newfidp = alloc_fid(s, newfid); | |
1538 | if (vs->newfidp == NULL) { | |
1539 | err = -EINVAL; | |
1540 | goto out; | |
1541 | } | |
1542 | ||
1543 | vs->newfidp->uid = vs->fidp->uid; | |
1544 | v9fs_string_init(&vs->path); | |
1545 | vs->name_idx = 0; | |
1546 | v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); | |
1547 | ||
1548 | if (vs->name_idx < vs->nwnames) { | |
1549 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1550 | vs->wnames[vs->name_idx].data); | |
1551 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1552 | ||
1553 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1554 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1555 | return; | |
1556 | } | |
9f107513 | 1557 | } |
ff5e54c9 AL |
1558 | |
1559 | v9fs_walk_marshal(vs); | |
1560 | err = vs->offset; | |
1561 | out: | |
1562 | v9fs_walk_complete(s, vs, err); | |
9f107513 AL |
1563 | } |
1564 | ||
5e94c103 MK |
1565 | static int32_t get_iounit(V9fsState *s, V9fsString *name) |
1566 | { | |
1567 | struct statfs stbuf; | |
1568 | int32_t iounit = 0; | |
1569 | ||
1570 | /* | |
1571 | * iounit should be multiples of f_bsize (host filesystem block size | |
1572 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1573 | */ | |
1574 | if (!v9fs_do_statfs(s, name, &stbuf)) { | |
1575 | iounit = stbuf.f_bsize; | |
1576 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1577 | } | |
1578 | ||
1579 | if (!iounit) { | |
1580 | iounit = s->msize - P9_IOHDRSZ; | |
1581 | } | |
1582 | return iounit; | |
1583 | } | |
1584 | ||
a6568fe2 AL |
1585 | static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1586 | { | |
1587 | if (vs->fidp->dir == NULL) { | |
1588 | err = -errno; | |
1589 | goto out; | |
1590 | } | |
1591 | ||
1592 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1593 | err = vs->offset; | |
1594 | out: | |
1595 | complete_pdu(s, vs->pdu, err); | |
1596 | qemu_free(vs); | |
1597 | ||
1598 | } | |
1599 | ||
5e94c103 MK |
1600 | static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1601 | { | |
1602 | int err; | |
1603 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); | |
1604 | err = vs->offset; | |
1605 | complete_pdu(s, vs->pdu, err); | |
1606 | qemu_free(vs); | |
1607 | } | |
1608 | ||
a6568fe2 AL |
1609 | static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1610 | { | |
1611 | if (vs->fidp->fd == -1) { | |
1612 | err = -errno; | |
1613 | goto out; | |
1614 | } | |
1615 | ||
5e94c103 MK |
1616 | vs->iounit = get_iounit(s, &vs->fidp->path); |
1617 | v9fs_open_post_getiounit(s, vs); | |
1618 | return; | |
a6568fe2 AL |
1619 | out: |
1620 | complete_pdu(s, vs->pdu, err); | |
1621 | qemu_free(vs); | |
1622 | } | |
1623 | ||
1624 | static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) | |
1625 | { | |
1626 | if (err) { | |
1627 | err = -errno; | |
1628 | goto out; | |
1629 | } | |
1630 | ||
1631 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1632 | ||
1633 | if (S_ISDIR(vs->stbuf.st_mode)) { | |
1634 | vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path); | |
1635 | v9fs_open_post_opendir(s, vs, err); | |
1636 | } else { | |
1637 | vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, | |
1638 | omode_to_uflags(vs->mode)); | |
1639 | v9fs_open_post_open(s, vs, err); | |
1640 | } | |
1641 | return; | |
1642 | out: | |
1643 | complete_pdu(s, vs->pdu, err); | |
1644 | qemu_free(vs); | |
9f107513 AL |
1645 | } |
1646 | ||
1647 | static void v9fs_open(V9fsState *s, V9fsPDU *pdu) | |
a6568fe2 AL |
1648 | { |
1649 | int32_t fid; | |
1650 | V9fsOpenState *vs; | |
1651 | ssize_t err = 0; | |
1652 | ||
1653 | ||
1654 | vs = qemu_malloc(sizeof(*vs)); | |
1655 | vs->pdu = pdu; | |
1656 | vs->offset = 7; | |
1657 | ||
1658 | pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode); | |
1659 | ||
1660 | vs->fidp = lookup_fid(s, fid); | |
1661 | if (vs->fidp == NULL) { | |
1662 | err = -ENOENT; | |
1663 | goto out; | |
1664 | } | |
1665 | ||
1666 | BUG_ON(vs->fidp->fd != -1); | |
1667 | BUG_ON(vs->fidp->dir); | |
1668 | ||
1669 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1670 | ||
1671 | v9fs_open_post_lstat(s, vs, err); | |
1672 | return; | |
1673 | out: | |
1674 | complete_pdu(s, pdu, err); | |
1675 | qemu_free(vs); | |
1676 | } | |
1677 | ||
c1568af5 VJ |
1678 | static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1679 | { | |
1680 | if (err == 0) { | |
1681 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
1682 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1683 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, | |
1684 | &vs->iounit); | |
1685 | err = vs->offset; | |
1686 | } else { | |
1687 | err = -errno; | |
1688 | } | |
1689 | ||
1690 | complete_pdu(s, vs->pdu, err); | |
1691 | v9fs_string_free(&vs->name); | |
1692 | v9fs_string_free(&vs->fullname); | |
1693 | qemu_free(vs); | |
1694 | } | |
1695 | ||
1696 | static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, | |
1697 | int err) | |
1698 | { | |
1699 | if (err) { | |
1700 | err = -errno; | |
1701 | goto out; | |
1702 | } | |
1703 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1704 | ||
1705 | out: | |
1706 | v9fs_post_lcreate(s, vs, err); | |
1707 | } | |
1708 | ||
1709 | static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, | |
1710 | int err) | |
1711 | { | |
1712 | if (vs->fidp->fd == -1) { | |
1713 | err = -errno; | |
1714 | goto out; | |
1715 | } | |
1716 | vs->iounit = get_iounit(s, &vs->fullname); | |
1717 | v9fs_lcreate_post_get_iounit(s, vs, err); | |
1718 | return; | |
1719 | ||
1720 | out: | |
1721 | v9fs_post_lcreate(s, vs, err); | |
1722 | } | |
1723 | ||
1724 | static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu) | |
1725 | { | |
1726 | int32_t dfid, flags, mode; | |
1727 | gid_t gid; | |
1728 | V9fsLcreateState *vs; | |
1729 | ssize_t err = 0; | |
1730 | ||
1731 | vs = qemu_malloc(sizeof(*vs)); | |
1732 | vs->pdu = pdu; | |
1733 | vs->offset = 7; | |
1734 | ||
1735 | v9fs_string_init(&vs->fullname); | |
1736 | ||
1737 | pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags, | |
1738 | &mode, &gid); | |
1739 | ||
1740 | vs->fidp = lookup_fid(s, dfid); | |
1741 | if (vs->fidp == NULL) { | |
1742 | err = -ENOENT; | |
1743 | goto out; | |
1744 | } | |
1745 | ||
1746 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
1747 | vs->name.data); | |
1748 | ||
1749 | vs->fidp->fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, | |
1750 | gid, flags, mode); | |
1751 | v9fs_lcreate_post_do_open2(s, vs, err); | |
1752 | return; | |
1753 | ||
1754 | out: | |
1755 | complete_pdu(s, vs->pdu, err); | |
1756 | v9fs_string_free(&vs->name); | |
1757 | qemu_free(vs); | |
1758 | } | |
1759 | ||
a6568fe2 AL |
1760 | static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
1761 | { | |
bbd5697b AL |
1762 | int32_t fid; |
1763 | size_t offset = 7; | |
1764 | int err; | |
1765 | ||
1766 | pdu_unmarshal(pdu, offset, "d", &fid); | |
1767 | ||
1768 | err = free_fid(s, fid); | |
1769 | if (err < 0) { | |
1770 | goto out; | |
a6568fe2 | 1771 | } |
bbd5697b AL |
1772 | |
1773 | offset = 7; | |
1774 | err = offset; | |
1775 | out: | |
1776 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1777 | } |
1778 | ||
a9231555 AL |
1779 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1780 | ||
1781 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1782 | { | |
1783 | if (err) { | |
1784 | goto out; | |
1785 | } | |
1786 | v9fs_stat_free(&vs->v9stat); | |
1787 | v9fs_string_free(&vs->name); | |
1788 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1789 | vs->offset += vs->count; | |
1790 | err = vs->offset; | |
1791 | out: | |
1792 | complete_pdu(s, vs->pdu, err); | |
1793 | qemu_free(vs); | |
1794 | return; | |
1795 | } | |
1796 | ||
1797 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1798 | ssize_t err) | |
1799 | { | |
1800 | if (err) { | |
1801 | err = -errno; | |
1802 | goto out; | |
1803 | } | |
1804 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1805 | if (err) { | |
1806 | goto out; | |
1807 | } | |
1808 | ||
1809 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1810 | &vs->v9stat); | |
1811 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1812 | ((vs->count + vs->len) > vs->max_count)) { | |
1813 | v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); | |
1814 | v9fs_read_post_seekdir(s, vs, err); | |
1815 | return; | |
1816 | } | |
1817 | vs->count += vs->len; | |
1818 | v9fs_stat_free(&vs->v9stat); | |
1819 | v9fs_string_free(&vs->name); | |
1820 | vs->dir_pos = vs->dent->d_off; | |
1821 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
1822 | v9fs_read_post_readdir(s, vs, err); | |
1823 | return; | |
1824 | out: | |
1825 | v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); | |
1826 | v9fs_read_post_seekdir(s, vs, err); | |
1827 | return; | |
1828 | ||
1829 | } | |
1830 | ||
1831 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1832 | { | |
1833 | if (vs->dent) { | |
1834 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1835 | v9fs_string_init(&vs->name); | |
1836 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1837 | vs->dent->d_name); | |
1838 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1839 | v9fs_read_post_dir_lstat(s, vs, err); | |
1840 | return; | |
1841 | } | |
1842 | ||
1843 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1844 | vs->offset += vs->count; | |
1845 | err = vs->offset; | |
1846 | complete_pdu(s, vs->pdu, err); | |
1847 | qemu_free(vs); | |
1848 | return; | |
1849 | } | |
1850 | ||
1851 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1852 | { | |
1853 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
1854 | v9fs_read_post_readdir(s, vs, err); | |
1855 | return; | |
1856 | } | |
1857 | ||
1858 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1859 | ssize_t err) | |
1860 | { | |
1861 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir); | |
1862 | v9fs_read_post_telldir(s, vs, err); | |
1863 | return; | |
1864 | } | |
1865 | ||
1866 | static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1867 | { | |
1868 | if (err < 0) { | |
1869 | /* IO error return the error */ | |
1870 | err = -errno; | |
1871 | goto out; | |
1872 | } | |
1873 | vs->total += vs->len; | |
1874 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1875 | if (vs->total < vs->count && vs->len > 0) { | |
1876 | do { | |
1877 | if (0) { | |
1878 | print_sg(vs->sg, vs->cnt); | |
1879 | } | |
1880 | vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1881 | } while (vs->len == -1 && errno == EINTR); | |
1882 | if (vs->len == -1) { | |
1883 | err = -errno; | |
1884 | } | |
1885 | v9fs_read_post_readv(s, vs, err); | |
1886 | return; | |
1887 | } | |
1888 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1889 | vs->offset += vs->count; | |
1890 | err = vs->offset; | |
1891 | ||
1892 | out: | |
1893 | complete_pdu(s, vs->pdu, err); | |
1894 | qemu_free(vs); | |
1895 | } | |
1896 | ||
1897 | static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1898 | { | |
1899 | if (err == -1) { | |
1900 | err = -errno; | |
1901 | goto out; | |
1902 | } | |
1903 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
1904 | ||
1905 | if (vs->total < vs->count) { | |
1906 | do { | |
1907 | if (0) { | |
1908 | print_sg(vs->sg, vs->cnt); | |
1909 | } | |
1910 | vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1911 | } while (vs->len == -1 && errno == EINTR); | |
1912 | if (vs->len == -1) { | |
1913 | err = -errno; | |
1914 | } | |
1915 | v9fs_read_post_readv(s, vs, err); | |
1916 | return; | |
1917 | } | |
1918 | out: | |
1919 | complete_pdu(s, vs->pdu, err); | |
1920 | qemu_free(vs); | |
1921 | } | |
1922 | ||
9f107513 AL |
1923 | static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
1924 | { | |
a9231555 AL |
1925 | int32_t fid; |
1926 | V9fsReadState *vs; | |
1927 | ssize_t err = 0; | |
1928 | ||
1929 | vs = qemu_malloc(sizeof(*vs)); | |
1930 | vs->pdu = pdu; | |
1931 | vs->offset = 7; | |
1932 | vs->total = 0; | |
1933 | vs->len = 0; | |
1934 | vs->count = 0; | |
1935 | ||
1936 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
1937 | ||
1938 | vs->fidp = lookup_fid(s, fid); | |
1939 | if (vs->fidp == NULL) { | |
1940 | err = -EINVAL; | |
1941 | goto out; | |
1942 | } | |
1943 | ||
1944 | if (vs->fidp->dir) { | |
1945 | vs->max_count = vs->count; | |
1946 | vs->count = 0; | |
1947 | if (vs->off == 0) { | |
1948 | v9fs_do_rewinddir(s, vs->fidp->dir); | |
1949 | } | |
1950 | v9fs_read_post_rewinddir(s, vs, err); | |
1951 | return; | |
1952 | } else if (vs->fidp->fd != -1) { | |
1953 | vs->sg = vs->iov; | |
1954 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
1955 | err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); | |
1956 | v9fs_read_post_lseek(s, vs, err); | |
1957 | return; | |
1958 | } else { | |
1959 | err = -EINVAL; | |
9f107513 | 1960 | } |
a9231555 AL |
1961 | out: |
1962 | complete_pdu(s, pdu, err); | |
1963 | qemu_free(vs); | |
9f107513 AL |
1964 | } |
1965 | ||
c18e2f94 SK |
1966 | typedef struct V9fsReadDirState { |
1967 | V9fsPDU *pdu; | |
1968 | V9fsFidState *fidp; | |
1969 | V9fsQID qid; | |
1970 | off_t saved_dir_pos; | |
1971 | struct dirent *dent; | |
1972 | int32_t count; | |
1973 | int32_t max_count; | |
1974 | size_t offset; | |
1975 | int64_t initial_offset; | |
1976 | V9fsString name; | |
1977 | } V9fsReadDirState; | |
1978 | ||
1979 | static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs) | |
1980 | { | |
1981 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1982 | vs->offset += vs->count; | |
1983 | complete_pdu(s, vs->pdu, vs->offset); | |
1984 | qemu_free(vs); | |
1985 | return; | |
1986 | } | |
1987 | ||
1988 | /* Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
1989 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
1990 | */ | |
1991 | #define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data)) | |
1992 | ||
1993 | static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs) | |
1994 | { | |
1995 | int len; | |
1996 | size_t size; | |
1997 | ||
1998 | if (vs->dent) { | |
1999 | v9fs_string_init(&vs->name); | |
2000 | v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name); | |
2001 | ||
2002 | if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) { | |
2003 | /* Ran out of buffer. Set dir back to old position and return */ | |
2004 | v9fs_do_seekdir(s, vs->fidp->dir, vs->saved_dir_pos); | |
2005 | v9fs_readdir_post_seekdir(s, vs); | |
2006 | return; | |
2007 | } | |
2008 | ||
2009 | /* Fill up just the path field of qid because the client uses | |
2010 | * only that. To fill the entire qid structure we will have | |
2011 | * to stat each dirent found, which is expensive | |
2012 | */ | |
2013 | size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path)); | |
2014 | memcpy(&vs->qid.path, &vs->dent->d_ino, size); | |
2015 | /* Fill the other fields with dummy values */ | |
2016 | vs->qid.type = 0; | |
2017 | vs->qid.version = 0; | |
2018 | ||
2019 | len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs", | |
2020 | &vs->qid, vs->dent->d_off, | |
2021 | vs->dent->d_type, &vs->name); | |
2022 | vs->count += len; | |
2023 | v9fs_string_free(&vs->name); | |
2024 | vs->saved_dir_pos = vs->dent->d_off; | |
2025 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
2026 | v9fs_readdir_post_readdir(s, vs); | |
2027 | return; | |
2028 | } | |
2029 | ||
2030 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
2031 | vs->offset += vs->count; | |
2032 | complete_pdu(s, vs->pdu, vs->offset); | |
2033 | qemu_free(vs); | |
2034 | return; | |
2035 | } | |
2036 | ||
2037 | static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs) | |
2038 | { | |
2039 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
2040 | v9fs_readdir_post_readdir(s, vs); | |
2041 | return; | |
2042 | } | |
2043 | ||
2044 | static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs) | |
2045 | { | |
2046 | vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->dir); | |
2047 | v9fs_readdir_post_telldir(s, vs); | |
2048 | return; | |
2049 | } | |
2050 | ||
2051 | static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu) | |
2052 | { | |
2053 | int32_t fid; | |
2054 | V9fsReadDirState *vs; | |
2055 | ssize_t err = 0; | |
2056 | size_t offset = 7; | |
2057 | ||
2058 | vs = qemu_malloc(sizeof(*vs)); | |
2059 | vs->pdu = pdu; | |
2060 | vs->offset = 7; | |
2061 | vs->count = 0; | |
2062 | ||
2063 | pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset, | |
2064 | &vs->max_count); | |
2065 | ||
2066 | vs->fidp = lookup_fid(s, fid); | |
2067 | if (vs->fidp == NULL || !(vs->fidp->dir)) { | |
2068 | err = -EINVAL; | |
2069 | goto out; | |
2070 | } | |
2071 | ||
2072 | if (vs->initial_offset == 0) { | |
2073 | v9fs_do_rewinddir(s, vs->fidp->dir); | |
2074 | } else { | |
2075 | v9fs_do_seekdir(s, vs->fidp->dir, vs->initial_offset); | |
2076 | } | |
2077 | ||
2078 | v9fs_readdir_post_setdir(s, vs); | |
2079 | return; | |
2080 | ||
2081 | out: | |
2082 | complete_pdu(s, pdu, err); | |
2083 | qemu_free(vs); | |
2084 | return; | |
2085 | } | |
2086 | ||
8449360c AL |
2087 | static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, |
2088 | ssize_t err) | |
2089 | { | |
2090 | if (err < 0) { | |
2091 | /* IO error return the error */ | |
2092 | err = -errno; | |
2093 | goto out; | |
2094 | } | |
2095 | vs->total += vs->len; | |
2096 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
2097 | if (vs->total < vs->count && vs->len > 0) { | |
2098 | do { | |
2099 | if (0) { | |
2100 | print_sg(vs->sg, vs->cnt); | |
2101 | } | |
2102 | vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); | |
2103 | } while (vs->len == -1 && errno == EINTR); | |
2104 | if (vs->len == -1) { | |
2105 | err = -errno; | |
2106 | } | |
2107 | v9fs_write_post_writev(s, vs, err); | |
2108 | return; | |
2109 | } | |
2110 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
2111 | ||
2112 | err = vs->offset; | |
2113 | out: | |
2114 | complete_pdu(s, vs->pdu, err); | |
2115 | qemu_free(vs); | |
2116 | } | |
2117 | ||
2118 | static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) | |
2119 | { | |
2120 | if (err == -1) { | |
2121 | err = -errno; | |
2122 | goto out; | |
2123 | } | |
2124 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
2125 | ||
2126 | if (vs->total < vs->count) { | |
2127 | do { | |
2128 | if (0) { | |
2129 | print_sg(vs->sg, vs->cnt); | |
2130 | } | |
2131 | vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); | |
2132 | } while (vs->len == -1 && errno == EINTR); | |
2133 | if (vs->len == -1) { | |
2134 | err = -errno; | |
2135 | } | |
2136 | v9fs_write_post_writev(s, vs, err); | |
2137 | return; | |
2138 | } | |
2139 | ||
2140 | out: | |
2141 | complete_pdu(s, vs->pdu, err); | |
2142 | qemu_free(vs); | |
2143 | } | |
2144 | ||
9f107513 AL |
2145 | static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
2146 | { | |
8449360c AL |
2147 | int32_t fid; |
2148 | V9fsWriteState *vs; | |
2149 | ssize_t err; | |
2150 | ||
2151 | vs = qemu_malloc(sizeof(*vs)); | |
2152 | ||
2153 | vs->pdu = pdu; | |
2154 | vs->offset = 7; | |
2155 | vs->sg = vs->iov; | |
2156 | vs->total = 0; | |
2157 | vs->len = 0; | |
2158 | ||
2159 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
2160 | vs->sg, &vs->cnt); | |
2161 | ||
2162 | vs->fidp = lookup_fid(s, fid); | |
2163 | if (vs->fidp == NULL) { | |
2164 | err = -EINVAL; | |
2165 | goto out; | |
9f107513 | 2166 | } |
8449360c AL |
2167 | |
2168 | if (vs->fidp->fd == -1) { | |
2169 | err = -EINVAL; | |
2170 | goto out; | |
2171 | } | |
2172 | ||
2173 | err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); | |
2174 | ||
2175 | v9fs_write_post_lseek(s, vs, err); | |
2176 | return; | |
2177 | ||
2178 | out: | |
2179 | complete_pdu(s, vs->pdu, err); | |
2180 | qemu_free(vs); | |
9f107513 AL |
2181 | } |
2182 | ||
5e94c103 | 2183 | static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
c494dd6f | 2184 | { |
5e94c103 MK |
2185 | int err; |
2186 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
2187 | stat_to_qid(&vs->stbuf, &vs->qid); | |
c494dd6f | 2188 | |
5e94c103 MK |
2189 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); |
2190 | err = vs->offset; | |
c494dd6f | 2191 | |
5e94c103 MK |
2192 | complete_pdu(s, vs->pdu, err); |
2193 | v9fs_string_free(&vs->name); | |
2194 | v9fs_string_free(&vs->extension); | |
2195 | v9fs_string_free(&vs->fullname); | |
2196 | qemu_free(vs); | |
2197 | } | |
2198 | ||
2199 | static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) | |
2200 | { | |
2201 | if (err == 0) { | |
2202 | vs->iounit = get_iounit(s, &vs->fidp->path); | |
2203 | v9fs_create_post_getiounit(s, vs); | |
2204 | return; | |
c494dd6f AL |
2205 | } |
2206 | ||
2207 | complete_pdu(s, vs->pdu, err); | |
2208 | v9fs_string_free(&vs->name); | |
2209 | v9fs_string_free(&vs->extension); | |
2210 | v9fs_string_free(&vs->fullname); | |
2211 | qemu_free(vs); | |
2212 | } | |
2213 | ||
2214 | static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) | |
2215 | { | |
2216 | if (err) { | |
2217 | err = -errno; | |
2218 | } | |
2219 | v9fs_post_create(s, vs, err); | |
2220 | } | |
2221 | ||
2222 | static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, | |
2223 | int err) | |
2224 | { | |
2225 | if (!vs->fidp->dir) { | |
2226 | err = -errno; | |
2227 | } | |
2228 | v9fs_post_create(s, vs, err); | |
2229 | } | |
2230 | ||
2231 | static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, | |
2232 | int err) | |
2233 | { | |
2234 | if (err) { | |
2235 | err = -errno; | |
2236 | goto out; | |
2237 | } | |
2238 | ||
2239 | vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname); | |
2240 | v9fs_create_post_opendir(s, vs, err); | |
2241 | return; | |
2242 | ||
2243 | out: | |
2244 | v9fs_post_create(s, vs, err); | |
2245 | } | |
2246 | ||
2247 | static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) | |
2248 | { | |
2249 | if (err) { | |
2250 | err = -errno; | |
2251 | goto out; | |
2252 | } | |
2253 | ||
2254 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2255 | v9fs_create_post_dir_lstat(s, vs, err); | |
2256 | return; | |
2257 | ||
2258 | out: | |
2259 | v9fs_post_create(s, vs, err); | |
2260 | } | |
2261 | ||
c494dd6f AL |
2262 | static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2263 | { | |
2264 | if (err) { | |
2265 | vs->fidp->fd = -1; | |
2266 | err = -errno; | |
2267 | } | |
2268 | ||
2269 | v9fs_post_create(s, vs, err); | |
2270 | return; | |
2271 | } | |
2272 | ||
2273 | static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) | |
2274 | { | |
2275 | if (vs->fidp->fd == -1) { | |
2276 | err = -errno; | |
2277 | goto out; | |
2278 | } | |
2279 | ||
2280 | err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf); | |
2281 | v9fs_create_post_fstat(s, vs, err); | |
2282 | ||
2283 | return; | |
2284 | ||
2285 | out: | |
2286 | v9fs_post_create(s, vs, err); | |
2287 | ||
2288 | } | |
2289 | ||
2290 | static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) | |
2291 | { | |
2292 | ||
2293 | if (err == 0 || errno != ENOENT) { | |
2294 | err = -errno; | |
2295 | goto out; | |
2296 | } | |
2297 | ||
2298 | if (vs->perm & P9_STAT_MODE_DIR) { | |
b67592ea MK |
2299 | err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777, |
2300 | vs->fidp->uid, -1); | |
c494dd6f AL |
2301 | v9fs_create_post_mkdir(s, vs, err); |
2302 | } else if (vs->perm & P9_STAT_MODE_SYMLINK) { | |
08c60fc9 VJ |
2303 | err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2304 | vs->fullname.data, -1); | |
c494dd6f AL |
2305 | v9fs_create_post_perms(s, vs, err); |
2306 | } else if (vs->perm & P9_STAT_MODE_LINK) { | |
2307 | int32_t nfid = atoi(vs->extension.data); | |
2308 | V9fsFidState *nfidp = lookup_fid(s, nfid); | |
2309 | if (nfidp == NULL) { | |
2310 | err = -errno; | |
2311 | v9fs_post_create(s, vs, err); | |
2312 | } | |
2313 | err = v9fs_do_link(s, &nfidp->path, &vs->fullname); | |
2314 | v9fs_create_post_perms(s, vs, err); | |
2315 | } else if (vs->perm & P9_STAT_MODE_DEVICE) { | |
2316 | char ctype; | |
2317 | uint32_t major, minor; | |
2318 | mode_t nmode = 0; | |
2319 | ||
2320 | if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, | |
2321 | &minor) != 3) { | |
2322 | err = -errno; | |
2323 | v9fs_post_create(s, vs, err); | |
2324 | } | |
2325 | ||
2326 | switch (ctype) { | |
2327 | case 'c': | |
2328 | nmode = S_IFCHR; | |
2329 | break; | |
2330 | case 'b': | |
2331 | nmode = S_IFBLK; | |
2332 | break; | |
2333 | default: | |
2334 | err = -EIO; | |
2335 | v9fs_post_create(s, vs, err); | |
2336 | } | |
2337 | ||
2338 | nmode |= vs->perm & 0777; | |
5268cecc MK |
2339 | err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2340 | makedev(major, minor), vs->fidp->uid, -1); | |
c494dd6f AL |
2341 | v9fs_create_post_perms(s, vs, err); |
2342 | } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { | |
5268cecc MK |
2343 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777), |
2344 | 0, vs->fidp->uid, -1); | |
c494dd6f AL |
2345 | v9fs_post_create(s, vs, err); |
2346 | } else if (vs->perm & P9_STAT_MODE_SOCKET) { | |
5268cecc MK |
2347 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777), |
2348 | 0, vs->fidp->uid, -1); | |
63729c36 | 2349 | v9fs_post_create(s, vs, err); |
c494dd6f | 2350 | } else { |
c1568af5 VJ |
2351 | vs->fidp->fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
2352 | -1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm); | |
2353 | ||
c494dd6f AL |
2354 | v9fs_create_post_open2(s, vs, err); |
2355 | } | |
2356 | ||
2357 | return; | |
2358 | ||
2359 | out: | |
2360 | v9fs_post_create(s, vs, err); | |
2361 | } | |
2362 | ||
9f107513 AL |
2363 | static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
2364 | { | |
c494dd6f AL |
2365 | int32_t fid; |
2366 | V9fsCreateState *vs; | |
2367 | int err = 0; | |
2368 | ||
2369 | vs = qemu_malloc(sizeof(*vs)); | |
2370 | vs->pdu = pdu; | |
2371 | vs->offset = 7; | |
2372 | ||
2373 | v9fs_string_init(&vs->fullname); | |
2374 | ||
2375 | pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name, | |
2376 | &vs->perm, &vs->mode, &vs->extension); | |
2377 | ||
2378 | vs->fidp = lookup_fid(s, fid); | |
2379 | if (vs->fidp == NULL) { | |
2380 | err = -EINVAL; | |
2381 | goto out; | |
9f107513 | 2382 | } |
c494dd6f AL |
2383 | |
2384 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
2385 | vs->name.data); | |
2386 | ||
2387 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2388 | v9fs_create_post_lstat(s, vs, err); | |
2389 | return; | |
2390 | ||
2391 | out: | |
2392 | complete_pdu(s, vs->pdu, err); | |
2393 | v9fs_string_free(&vs->name); | |
2394 | v9fs_string_free(&vs->extension); | |
2395 | qemu_free(vs); | |
9f107513 AL |
2396 | } |
2397 | ||
08c60fc9 VJ |
2398 | static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2399 | { | |
2400 | if (err == 0) { | |
2401 | stat_to_qid(&vs->stbuf, &vs->qid); | |
2402 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
2403 | err = vs->offset; | |
2404 | } else { | |
2405 | err = -errno; | |
2406 | } | |
2407 | complete_pdu(s, vs->pdu, err); | |
2408 | v9fs_string_free(&vs->name); | |
2409 | v9fs_string_free(&vs->symname); | |
2410 | v9fs_string_free(&vs->fullname); | |
2411 | qemu_free(vs); | |
2412 | } | |
2413 | ||
2414 | static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, | |
2415 | int err) | |
2416 | { | |
2417 | if (err) { | |
2418 | goto out; | |
2419 | } | |
2420 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2421 | out: | |
2422 | v9fs_post_symlink(s, vs, err); | |
2423 | } | |
2424 | ||
2425 | static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu) | |
2426 | { | |
2427 | int32_t dfid; | |
2428 | V9fsSymlinkState *vs; | |
2429 | int err = 0; | |
2430 | gid_t gid; | |
2431 | ||
2432 | vs = qemu_malloc(sizeof(*vs)); | |
2433 | vs->pdu = pdu; | |
2434 | vs->offset = 7; | |
2435 | ||
2436 | v9fs_string_init(&vs->fullname); | |
2437 | ||
2438 | pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name, | |
2439 | &vs->symname, &gid); | |
2440 | ||
2441 | vs->dfidp = lookup_fid(s, dfid); | |
2442 | if (vs->dfidp == NULL) { | |
2443 | err = -EINVAL; | |
2444 | goto out; | |
2445 | } | |
2446 | ||
2447 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data, | |
2448 | vs->name.data); | |
2449 | err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, | |
2450 | vs->fullname.data, gid); | |
2451 | v9fs_symlink_post_do_symlink(s, vs, err); | |
2452 | return; | |
2453 | ||
2454 | out: | |
2455 | complete_pdu(s, vs->pdu, err); | |
2456 | v9fs_string_free(&vs->name); | |
2457 | v9fs_string_free(&vs->symname); | |
2458 | qemu_free(vs); | |
2459 | } | |
2460 | ||
9f107513 AL |
2461 | static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
2462 | { | |
9c5e9d89 AL |
2463 | /* A nop call with no return */ |
2464 | complete_pdu(s, pdu, 7); | |
9f107513 AL |
2465 | } |
2466 | ||
b2c224be VJ |
2467 | static void v9fs_link(V9fsState *s, V9fsPDU *pdu) |
2468 | { | |
2469 | int32_t dfid, oldfid; | |
2470 | V9fsFidState *dfidp, *oldfidp; | |
2471 | V9fsString name, fullname; | |
2472 | size_t offset = 7; | |
2473 | int err = 0; | |
2474 | ||
2475 | v9fs_string_init(&fullname); | |
2476 | ||
2477 | pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2478 | ||
2479 | dfidp = lookup_fid(s, dfid); | |
2480 | if (dfidp == NULL) { | |
2481 | err = -errno; | |
2482 | goto out; | |
2483 | } | |
2484 | ||
2485 | oldfidp = lookup_fid(s, oldfid); | |
2486 | if (oldfidp == NULL) { | |
2487 | err = -errno; | |
2488 | goto out; | |
2489 | } | |
2490 | ||
2491 | v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data); | |
2492 | err = offset; | |
2493 | err = v9fs_do_link(s, &oldfidp->path, &fullname); | |
2494 | if (err) { | |
2495 | err = -errno; | |
2496 | } | |
2497 | v9fs_string_free(&fullname); | |
2498 | ||
2499 | out: | |
2500 | v9fs_string_free(&name); | |
2501 | complete_pdu(s, pdu, err); | |
2502 | } | |
2503 | ||
5bae1900 AL |
2504 | static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
2505 | int err) | |
2506 | { | |
5bae1900 | 2507 | if (err < 0) { |
926487b7 SK |
2508 | err = -errno; |
2509 | } else { | |
2510 | err = vs->offset; | |
5bae1900 AL |
2511 | } |
2512 | ||
926487b7 SK |
2513 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
2514 | free_fid(s, vs->fidp->fid); | |
2515 | ||
5bae1900 AL |
2516 | complete_pdu(s, vs->pdu, err); |
2517 | qemu_free(vs); | |
2518 | } | |
2519 | ||
9f107513 AL |
2520 | static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
2521 | { | |
5bae1900 AL |
2522 | int32_t fid; |
2523 | V9fsRemoveState *vs; | |
2524 | int err = 0; | |
2525 | ||
2526 | vs = qemu_malloc(sizeof(*vs)); | |
2527 | vs->pdu = pdu; | |
2528 | vs->offset = 7; | |
2529 | ||
2530 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
2531 | ||
2532 | vs->fidp = lookup_fid(s, fid); | |
2533 | if (vs->fidp == NULL) { | |
2534 | err = -EINVAL; | |
2535 | goto out; | |
9f107513 | 2536 | } |
5bae1900 AL |
2537 | |
2538 | err = v9fs_do_remove(s, &vs->fidp->path); | |
2539 | v9fs_remove_post_remove(s, vs, err); | |
2540 | return; | |
2541 | ||
2542 | out: | |
2543 | complete_pdu(s, pdu, err); | |
2544 | qemu_free(vs); | |
9f107513 AL |
2545 | } |
2546 | ||
8cf89e00 AL |
2547 | static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2548 | { | |
2549 | if (err < 0) { | |
2550 | goto out; | |
2551 | } | |
2552 | ||
2553 | err = vs->offset; | |
2554 | ||
2555 | out: | |
2556 | v9fs_stat_free(&vs->v9stat); | |
2557 | complete_pdu(s, vs->pdu, err); | |
2558 | qemu_free(vs); | |
2559 | } | |
2560 | ||
2561 | static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) | |
2562 | { | |
2563 | if (err < 0) { | |
2564 | goto out; | |
2565 | } | |
2566 | ||
2567 | if (vs->v9stat.name.size != 0) { | |
2568 | v9fs_string_free(&vs->nname); | |
2569 | } | |
2570 | ||
2571 | if (vs->v9stat.length != -1) { | |
2572 | if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { | |
2573 | err = -errno; | |
2574 | } | |
2575 | } | |
2576 | v9fs_wstat_post_truncate(s, vs, err); | |
2577 | return; | |
2578 | ||
2579 | out: | |
2580 | v9fs_stat_free(&vs->v9stat); | |
2581 | complete_pdu(s, vs->pdu, err); | |
2582 | qemu_free(vs); | |
2583 | } | |
2584 | ||
2585 | static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) | |
2586 | { | |
2587 | V9fsFidState *fidp; | |
2588 | if (err < 0) { | |
2589 | goto out; | |
2590 | } | |
2591 | ||
2592 | if (vs->v9stat.name.size != 0) { | |
2593 | char *old_name, *new_name; | |
2594 | char *end; | |
2595 | ||
2596 | old_name = vs->fidp->path.data; | |
2597 | end = strrchr(old_name, '/'); | |
2598 | if (end) { | |
2599 | end++; | |
2600 | } else { | |
2601 | end = old_name; | |
2602 | } | |
2603 | ||
cc597832 | 2604 | new_name = qemu_mallocz(end - old_name + vs->v9stat.name.size + 1); |
8cf89e00 | 2605 | |
8cf89e00 AL |
2606 | memcpy(new_name, old_name, end - old_name); |
2607 | memcpy(new_name + (end - old_name), vs->v9stat.name.data, | |
2608 | vs->v9stat.name.size); | |
2609 | vs->nname.data = new_name; | |
2610 | vs->nname.size = strlen(new_name); | |
2611 | ||
2612 | if (strcmp(new_name, vs->fidp->path.data) != 0) { | |
2613 | if (v9fs_do_rename(s, &vs->fidp->path, &vs->nname)) { | |
2614 | err = -errno; | |
2615 | } else { | |
2616 | /* | |
2617 | * Fixup fid's pointing to the old name to | |
2618 | * start pointing to the new name | |
2619 | */ | |
2620 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2621 | ||
2622 | if (vs->fidp == fidp) { | |
2623 | /* | |
2624 | * we replace name of this fid towards the end | |
2625 | * so that our below strcmp will work | |
2626 | */ | |
2627 | continue; | |
2628 | } | |
2629 | if (!strncmp(vs->fidp->path.data, fidp->path.data, | |
2630 | strlen(vs->fidp->path.data))) { | |
2631 | /* replace the name */ | |
2632 | v9fs_fix_path(&fidp->path, &vs->nname, | |
2633 | strlen(vs->fidp->path.data)); | |
2634 | } | |
2635 | } | |
2636 | v9fs_string_copy(&vs->fidp->path, &vs->nname); | |
2637 | } | |
2638 | } | |
2639 | } | |
2640 | v9fs_wstat_post_rename(s, vs, err); | |
2641 | return; | |
2642 | ||
2643 | out: | |
2644 | v9fs_stat_free(&vs->v9stat); | |
2645 | complete_pdu(s, vs->pdu, err); | |
2646 | qemu_free(vs); | |
2647 | } | |
2648 | ||
2649 | static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) | |
2650 | { | |
2651 | if (err < 0) { | |
2652 | goto out; | |
2653 | } | |
2654 | ||
f7613bee | 2655 | if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
8cf89e00 AL |
2656 | if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid, |
2657 | vs->v9stat.n_gid)) { | |
2658 | err = -errno; | |
2659 | } | |
2660 | } | |
2661 | v9fs_wstat_post_chown(s, vs, err); | |
2662 | return; | |
2663 | ||
2664 | out: | |
2665 | v9fs_stat_free(&vs->v9stat); | |
2666 | complete_pdu(s, vs->pdu, err); | |
2667 | qemu_free(vs); | |
2668 | } | |
2669 | ||
2670 | static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) | |
2671 | { | |
2672 | if (err < 0) { | |
2673 | goto out; | |
2674 | } | |
2675 | ||
74bc02b2 | 2676 | if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
8fc39ae4 SK |
2677 | struct timespec times[2]; |
2678 | if (vs->v9stat.atime != -1) { | |
2679 | times[0].tv_sec = vs->v9stat.atime; | |
2680 | times[0].tv_nsec = 0; | |
2681 | } else { | |
2682 | times[0].tv_nsec = UTIME_OMIT; | |
2683 | } | |
2684 | if (vs->v9stat.mtime != -1) { | |
2685 | times[1].tv_sec = vs->v9stat.mtime; | |
2686 | times[1].tv_nsec = 0; | |
2687 | } else { | |
2688 | times[1].tv_nsec = UTIME_OMIT; | |
2689 | } | |
2690 | ||
2691 | if (v9fs_do_utimensat(s, &vs->fidp->path, times)) { | |
8cf89e00 AL |
2692 | err = -errno; |
2693 | } | |
2694 | } | |
2695 | ||
2696 | v9fs_wstat_post_utime(s, vs, err); | |
2697 | return; | |
2698 | ||
2699 | out: | |
2700 | v9fs_stat_free(&vs->v9stat); | |
2701 | complete_pdu(s, vs->pdu, err); | |
2702 | qemu_free(vs); | |
2703 | } | |
2704 | ||
2705 | static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) | |
2706 | { | |
2707 | if (err == -1) { | |
2708 | err = -errno; | |
2709 | } | |
2710 | v9fs_stat_free(&vs->v9stat); | |
2711 | complete_pdu(s, vs->pdu, err); | |
2712 | qemu_free(vs); | |
2713 | } | |
2714 | ||
2715 | static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) | |
2716 | { | |
2717 | uint32_t v9_mode; | |
2718 | ||
2719 | if (err == -1) { | |
2720 | err = -errno; | |
2721 | goto out; | |
2722 | } | |
2723 | ||
2724 | v9_mode = stat_to_v9mode(&vs->stbuf); | |
2725 | ||
2726 | if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2727 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2728 | /* Attempting to change the type */ | |
2729 | err = -EIO; | |
2730 | goto out; | |
2731 | } | |
2732 | ||
2733 | if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode, | |
2734 | &vs->v9stat.extension))) { | |
2735 | err = -errno; | |
2736 | } | |
2737 | v9fs_wstat_post_chmod(s, vs, err); | |
2738 | return; | |
2739 | ||
2740 | out: | |
2741 | v9fs_stat_free(&vs->v9stat); | |
2742 | complete_pdu(s, vs->pdu, err); | |
2743 | qemu_free(vs); | |
2744 | } | |
2745 | ||
9f107513 AL |
2746 | static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2747 | { | |
8cf89e00 AL |
2748 | int32_t fid; |
2749 | V9fsWstatState *vs; | |
2750 | int err = 0; | |
2751 | ||
2752 | vs = qemu_malloc(sizeof(*vs)); | |
2753 | vs->pdu = pdu; | |
2754 | vs->offset = 7; | |
2755 | ||
2756 | pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat); | |
2757 | ||
2758 | vs->fidp = lookup_fid(s, fid); | |
2759 | if (vs->fidp == NULL) { | |
2760 | err = -EINVAL; | |
2761 | goto out; | |
9f107513 | 2762 | } |
8cf89e00 AL |
2763 | |
2764 | /* do we need to sync the file? */ | |
2765 | if (donttouch_stat(&vs->v9stat)) { | |
2766 | err = v9fs_do_fsync(s, vs->fidp->fd); | |
2767 | v9fs_wstat_post_fsync(s, vs, err); | |
2768 | return; | |
2769 | } | |
2770 | ||
2771 | if (vs->v9stat.mode != -1) { | |
2772 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
2773 | v9fs_wstat_post_lstat(s, vs, err); | |
2774 | return; | |
2775 | } | |
2776 | ||
2777 | v9fs_wstat_post_chmod(s, vs, err); | |
2778 | return; | |
2779 | ||
2780 | out: | |
2781 | v9fs_stat_free(&vs->v9stat); | |
2782 | complete_pdu(s, vs->pdu, err); | |
2783 | qemu_free(vs); | |
9f107513 AL |
2784 | } |
2785 | ||
be940c87 MK |
2786 | static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err) |
2787 | { | |
5e94c103 MK |
2788 | int32_t bsize_factor; |
2789 | ||
be940c87 MK |
2790 | if (err) { |
2791 | err = -errno; | |
2792 | goto out; | |
2793 | } | |
2794 | ||
5e94c103 MK |
2795 | /* |
2796 | * compute bsize factor based on host file system block size | |
2797 | * and client msize | |
2798 | */ | |
2799 | bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize; | |
2800 | if (!bsize_factor) { | |
2801 | bsize_factor = 1; | |
2802 | } | |
be940c87 MK |
2803 | vs->v9statfs.f_type = vs->stbuf.f_type; |
2804 | vs->v9statfs.f_bsize = vs->stbuf.f_bsize; | |
5e94c103 MK |
2805 | vs->v9statfs.f_bsize *= bsize_factor; |
2806 | /* | |
2807 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
2808 | * adjust(divide) the number of blocks, free blocks and available | |
2809 | * blocks by bsize factor | |
2810 | */ | |
2811 | vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor; | |
2812 | vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor; | |
2813 | vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor; | |
be940c87 MK |
2814 | vs->v9statfs.f_files = vs->stbuf.f_files; |
2815 | vs->v9statfs.f_ffree = vs->stbuf.f_ffree; | |
2816 | vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] | | |
2817 | (unsigned long long)vs->stbuf.f_fsid.__val[1] << 32; | |
2818 | vs->v9statfs.f_namelen = vs->stbuf.f_namelen; | |
2819 | ||
2820 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd", | |
2821 | vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks, | |
2822 | vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files, | |
2823 | vs->v9statfs.f_ffree, vs->v9statfs.fsid_val, | |
2824 | vs->v9statfs.f_namelen); | |
2825 | ||
2826 | out: | |
2827 | complete_pdu(s, vs->pdu, vs->offset); | |
2828 | qemu_free(vs); | |
2829 | } | |
2830 | ||
2831 | static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu) | |
2832 | { | |
2833 | V9fsStatfsState *vs; | |
2834 | ssize_t err = 0; | |
2835 | ||
2836 | vs = qemu_malloc(sizeof(*vs)); | |
2837 | vs->pdu = pdu; | |
2838 | vs->offset = 7; | |
2839 | ||
2840 | memset(&vs->v9statfs, 0, sizeof(vs->v9statfs)); | |
2841 | ||
2842 | pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid); | |
2843 | ||
2844 | vs->fidp = lookup_fid(s, vs->fid); | |
2845 | if (vs->fidp == NULL) { | |
2846 | err = -ENOENT; | |
2847 | goto out; | |
2848 | } | |
2849 | ||
2850 | err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf); | |
2851 | v9fs_statfs_post_statfs(s, vs, err); | |
2852 | return; | |
2853 | ||
2854 | out: | |
2855 | complete_pdu(s, vs->pdu, err); | |
2856 | qemu_free(vs); | |
2857 | } | |
2858 | ||
5268cecc MK |
2859 | static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
2860 | { | |
2861 | if (err == -1) { | |
2862 | err = -errno; | |
2863 | goto out; | |
2864 | } | |
2865 | ||
2866 | stat_to_qid(&vs->stbuf, &vs->qid); | |
2867 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
2868 | err = vs->offset; | |
2869 | out: | |
2870 | complete_pdu(s, vs->pdu, err); | |
2871 | v9fs_string_free(&vs->fullname); | |
2872 | v9fs_string_free(&vs->name); | |
2873 | qemu_free(vs); | |
2874 | } | |
2875 | ||
2876 | static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err) | |
2877 | { | |
2878 | if (err == -1) { | |
2879 | err = -errno; | |
2880 | goto out; | |
2881 | } | |
2882 | ||
2883 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2884 | v9fs_mknod_post_lstat(s, vs, err); | |
2885 | return; | |
2886 | out: | |
2887 | complete_pdu(s, vs->pdu, err); | |
2888 | v9fs_string_free(&vs->fullname); | |
2889 | v9fs_string_free(&vs->name); | |
2890 | qemu_free(vs); | |
2891 | } | |
2892 | ||
2893 | static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu) | |
2894 | { | |
2895 | int32_t fid; | |
2896 | V9fsMkState *vs; | |
2897 | int err = 0; | |
2898 | V9fsFidState *fidp; | |
2899 | gid_t gid; | |
2900 | int mode; | |
2901 | int major, minor; | |
2902 | ||
2903 | vs = qemu_malloc(sizeof(*vs)); | |
2904 | vs->pdu = pdu; | |
2905 | vs->offset = 7; | |
2906 | ||
2907 | v9fs_string_init(&vs->fullname); | |
2908 | pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode, | |
2909 | &major, &minor, &gid); | |
2910 | ||
2911 | fidp = lookup_fid(s, fid); | |
2912 | if (fidp == NULL) { | |
2913 | err = -ENOENT; | |
2914 | goto out; | |
2915 | } | |
2916 | ||
2917 | v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data); | |
2918 | err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor), | |
2919 | fidp->uid, gid); | |
2920 | v9fs_mknod_post_mknod(s, vs, err); | |
2921 | return; | |
2922 | ||
2923 | out: | |
2924 | complete_pdu(s, vs->pdu, err); | |
2925 | v9fs_string_free(&vs->fullname); | |
2926 | v9fs_string_free(&vs->name); | |
2927 | qemu_free(vs); | |
2928 | } | |
2929 | ||
b67592ea MK |
2930 | static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
2931 | { | |
2932 | if (err == -1) { | |
2933 | err = -errno; | |
2934 | goto out; | |
2935 | } | |
2936 | ||
2937 | stat_to_qid(&vs->stbuf, &vs->qid); | |
2938 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
2939 | err = vs->offset; | |
2940 | out: | |
2941 | complete_pdu(s, vs->pdu, err); | |
2942 | v9fs_string_free(&vs->fullname); | |
2943 | v9fs_string_free(&vs->name); | |
2944 | qemu_free(vs); | |
2945 | } | |
2946 | ||
2947 | static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err) | |
2948 | { | |
2949 | if (err == -1) { | |
2950 | err = -errno; | |
2951 | goto out; | |
2952 | } | |
2953 | ||
2954 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2955 | v9fs_mkdir_post_lstat(s, vs, err); | |
2956 | return; | |
2957 | out: | |
2958 | complete_pdu(s, vs->pdu, err); | |
2959 | v9fs_string_free(&vs->fullname); | |
2960 | v9fs_string_free(&vs->name); | |
2961 | qemu_free(vs); | |
2962 | } | |
2963 | ||
2964 | static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu) | |
2965 | { | |
2966 | int32_t fid; | |
2967 | V9fsMkState *vs; | |
2968 | int err = 0; | |
2969 | V9fsFidState *fidp; | |
2970 | gid_t gid; | |
2971 | int mode; | |
2972 | ||
2973 | vs = qemu_malloc(sizeof(*vs)); | |
2974 | vs->pdu = pdu; | |
2975 | vs->offset = 7; | |
2976 | ||
2977 | v9fs_string_init(&vs->fullname); | |
2978 | pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode, | |
2979 | &gid); | |
2980 | ||
2981 | fidp = lookup_fid(s, fid); | |
2982 | if (fidp == NULL) { | |
2983 | err = -ENOENT; | |
2984 | goto out; | |
2985 | } | |
2986 | ||
2987 | v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data); | |
2988 | err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid); | |
2989 | v9fs_mkdir_post_mkdir(s, vs, err); | |
2990 | return; | |
2991 | ||
2992 | out: | |
2993 | complete_pdu(s, vs->pdu, err); | |
2994 | v9fs_string_free(&vs->fullname); | |
2995 | v9fs_string_free(&vs->name); | |
2996 | qemu_free(vs); | |
2997 | } | |
2998 | ||
9f107513 AL |
2999 | typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
3000 | ||
3001 | static pdu_handler_t *pdu_handlers[] = { | |
c18e2f94 | 3002 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3003 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3004 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3005 | [P9_TSETATTR] = v9fs_setattr, |
5268cecc | 3006 | [P9_TMKNOD] = v9fs_mknod, |
b67592ea | 3007 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 AL |
3008 | [P9_TVERSION] = v9fs_version, |
3009 | [P9_TATTACH] = v9fs_attach, | |
3010 | [P9_TSTAT] = v9fs_stat, | |
3011 | [P9_TWALK] = v9fs_walk, | |
3012 | [P9_TCLUNK] = v9fs_clunk, | |
3013 | [P9_TOPEN] = v9fs_open, | |
3014 | [P9_TREAD] = v9fs_read, | |
3015 | #if 0 | |
3016 | [P9_TAUTH] = v9fs_auth, | |
3017 | #endif | |
3018 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3019 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3020 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3021 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3022 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3023 | [P9_TWRITE] = v9fs_write, |
3024 | [P9_TWSTAT] = v9fs_wstat, | |
3025 | [P9_TREMOVE] = v9fs_remove, | |
3026 | }; | |
3027 | ||
3028 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) | |
3029 | { | |
3030 | pdu_handler_t *handler; | |
3031 | ||
3032 | if (debug_9p_pdu) { | |
3033 | pprint_pdu(pdu); | |
3034 | } | |
3035 | ||
3036 | BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); | |
3037 | ||
3038 | handler = pdu_handlers[pdu->id]; | |
3039 | BUG_ON(handler == NULL); | |
3040 | ||
3041 | handler(s, pdu); | |
3042 | } | |
3043 | ||
3044 | static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) | |
3045 | { | |
3046 | V9fsState *s = (V9fsState *)vdev; | |
3047 | V9fsPDU *pdu; | |
3048 | ssize_t len; | |
3049 | ||
3050 | while ((pdu = alloc_pdu(s)) && | |
3051 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
3052 | uint8_t *ptr; | |
3053 | ||
3054 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); | |
3055 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
3056 | ||
3057 | ptr = pdu->elem.out_sg[0].iov_base; | |
3058 | ||
3059 | memcpy(&pdu->size, ptr, 4); | |
3060 | pdu->id = ptr[4]; | |
3061 | memcpy(&pdu->tag, ptr + 5, 2); | |
3062 | ||
3063 | submit_pdu(s, pdu); | |
3064 | } | |
3065 | ||
3066 | free_pdu(s, pdu); | |
3067 | } | |
3068 | ||
3069 | static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features) | |
3070 | { | |
3071 | features |= 1 << VIRTIO_9P_MOUNT_TAG; | |
3072 | return features; | |
3073 | } | |
3074 | ||
3075 | static V9fsState *to_virtio_9p(VirtIODevice *vdev) | |
3076 | { | |
3077 | return (V9fsState *)vdev; | |
3078 | } | |
3079 | ||
3080 | static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) | |
3081 | { | |
3082 | struct virtio_9p_config *cfg; | |
3083 | V9fsState *s = to_virtio_9p(vdev); | |
3084 | ||
3085 | cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + | |
3086 | s->tag_len); | |
3087 | stw_raw(&cfg->tag_len, s->tag_len); | |
3088 | memcpy(cfg->tag, s->tag, s->tag_len); | |
3089 | memcpy(config, cfg, s->config_size); | |
3090 | qemu_free(cfg); | |
3091 | } | |
3092 | ||
3093 | VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) | |
3094 | { | |
3095 | V9fsState *s; | |
3096 | int i, len; | |
3097 | struct stat stat; | |
3098 | FsTypeEntry *fse; | |
3099 | ||
3100 | ||
3101 | s = (V9fsState *)virtio_common_init("virtio-9p", | |
3102 | VIRTIO_ID_9P, | |
3103 | sizeof(struct virtio_9p_config)+ | |
3104 | MAX_TAG_LEN, | |
3105 | sizeof(V9fsState)); | |
3106 | ||
3107 | /* initialize pdu allocator */ | |
3108 | QLIST_INIT(&s->free_list); | |
3109 | for (i = 0; i < (MAX_REQ - 1); i++) { | |
3110 | QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); | |
3111 | } | |
3112 | ||
3113 | s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); | |
3114 | ||
3115 | fse = get_fsdev_fsentry(conf->fsdev_id); | |
3116 | ||
3117 | if (!fse) { | |
3118 | /* We don't have a fsdev identified by fsdev_id */ | |
3119 | fprintf(stderr, "Virtio-9p device couldn't find fsdev " | |
3120 | "with the id %s\n", conf->fsdev_id); | |
3121 | exit(1); | |
3122 | } | |
3123 | ||
3124 | if (!fse->path || !conf->tag) { | |
3125 | /* we haven't specified a mount_tag or the path */ | |
3126 | fprintf(stderr, "fsdev with id %s needs path " | |
3127 | "and Virtio-9p device needs mount_tag arguments\n", | |
3128 | conf->fsdev_id); | |
3129 | exit(1); | |
3130 | } | |
3131 | ||
758e8e38 VJ |
3132 | if (!strcmp(fse->security_model, "passthrough")) { |
3133 | /* Files on the Fileserver set to client user credentials */ | |
3134 | s->ctx.fs_sm = SM_PASSTHROUGH; | |
3135 | } else if (!strcmp(fse->security_model, "mapped")) { | |
3136 | /* Files on the fileserver are set to QEMU credentials. | |
3137 | * Client user credentials are saved in extended attributes. | |
3138 | */ | |
3139 | s->ctx.fs_sm = SM_MAPPED; | |
3140 | } else { | |
9ce56db6 VJ |
3141 | /* user haven't specified a correct security option */ |
3142 | fprintf(stderr, "one of the following must be specified as the" | |
3143 | "security option:\n\t security_model=passthrough \n\t " | |
3144 | "security_model=mapped\n"); | |
3145 | return NULL; | |
3146 | } | |
3147 | ||
9f107513 AL |
3148 | if (lstat(fse->path, &stat)) { |
3149 | fprintf(stderr, "share path %s does not exist\n", fse->path); | |
3150 | exit(1); | |
3151 | } else if (!S_ISDIR(stat.st_mode)) { | |
3152 | fprintf(stderr, "share path %s is not a directory \n", fse->path); | |
3153 | exit(1); | |
3154 | } | |
3155 | ||
3156 | s->ctx.fs_root = qemu_strdup(fse->path); | |
3157 | len = strlen(conf->tag); | |
3158 | if (len > MAX_TAG_LEN) { | |
3159 | len = MAX_TAG_LEN; | |
3160 | } | |
3161 | /* s->tag is non-NULL terminated string */ | |
3162 | s->tag = qemu_malloc(len); | |
3163 | memcpy(s->tag, conf->tag, len); | |
3164 | s->tag_len = len; | |
3165 | s->ctx.uid = -1; | |
3166 | ||
3167 | s->ops = fse->ops; | |
3168 | s->vdev.get_features = virtio_9p_get_features; | |
3169 | s->config_size = sizeof(struct virtio_9p_config) + | |
3170 | s->tag_len; | |
3171 | s->vdev.get_config = virtio_9p_get_config; | |
3172 | ||
3173 | return &s->vdev; | |
3174 | } |