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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 | ||
163 | static int v9fs_do_mknod(V9fsState *s, V9fsString *path, mode_t mode, dev_t dev) | |
164 | { | |
165 | return s->ops->mknod(&s->ctx, path->data, mode, dev); | |
166 | } | |
167 | ||
168 | static int v9fs_do_mksock(V9fsState *s, V9fsString *path) | |
169 | { | |
170 | return s->ops->mksock(&s->ctx, path->data); | |
171 | } | |
172 | ||
00ec5c37 | 173 | static int v9fs_do_mkdir(V9fsState *s, V9fsCreateState *vs) |
c494dd6f | 174 | { |
00ec5c37 VJ |
175 | FsCred cred; |
176 | ||
177 | cred_init(&cred); | |
178 | cred.fc_uid = vs->fidp->uid; | |
179 | cred.fc_mode = vs->perm & 0777; | |
180 | ||
181 | return s->ops->mkdir(&s->ctx, vs->fullname.data, &cred); | |
c494dd6f AL |
182 | } |
183 | ||
184 | static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) | |
185 | { | |
186 | return s->ops->fstat(&s->ctx, fd, stbuf); | |
187 | } | |
188 | ||
4750a96f | 189 | static int v9fs_do_open2(V9fsState *s, V9fsCreateState *vs) |
c494dd6f | 190 | { |
4750a96f VJ |
191 | FsCred cred; |
192 | int flags; | |
193 | ||
194 | cred_init(&cred); | |
195 | cred.fc_uid = vs->fidp->uid; | |
196 | cred.fc_mode = vs->perm & 0777; | |
197 | flags = omode_to_uflags(vs->mode) | O_CREAT; | |
198 | ||
199 | return s->ops->open2(&s->ctx, vs->fullname.data, flags, &cred); | |
c494dd6f AL |
200 | } |
201 | ||
202 | static int v9fs_do_symlink(V9fsState *s, V9fsString *oldpath, | |
203 | V9fsString *newpath) | |
204 | { | |
205 | return s->ops->symlink(&s->ctx, oldpath->data, newpath->data); | |
206 | } | |
207 | ||
208 | static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) | |
209 | { | |
210 | return s->ops->link(&s->ctx, oldpath->data, newpath->data); | |
211 | } | |
212 | ||
8cf89e00 AL |
213 | static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
214 | { | |
215 | return s->ops->truncate(&s->ctx, path->data, size); | |
216 | } | |
217 | ||
218 | static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, | |
219 | V9fsString *newpath) | |
220 | { | |
221 | return s->ops->rename(&s->ctx, oldpath->data, newpath->data); | |
222 | } | |
223 | ||
224 | static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) | |
225 | { | |
f7613bee VJ |
226 | FsCred cred; |
227 | cred_init(&cred); | |
228 | cred.fc_uid = uid; | |
229 | cred.fc_gid = gid; | |
230 | ||
231 | return s->ops->chown(&s->ctx, path->data, &cred); | |
8cf89e00 AL |
232 | } |
233 | ||
234 | static int v9fs_do_utime(V9fsState *s, V9fsString *path, | |
235 | const struct utimbuf *buf) | |
236 | { | |
237 | return s->ops->utime(&s->ctx, path->data, buf); | |
238 | } | |
239 | ||
5bae1900 AL |
240 | static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
241 | { | |
242 | return s->ops->remove(&s->ctx, path->data); | |
243 | } | |
244 | ||
8cf89e00 AL |
245 | static int v9fs_do_fsync(V9fsState *s, int fd) |
246 | { | |
247 | return s->ops->fsync(&s->ctx, fd); | |
248 | } | |
249 | ||
a03f7874 AL |
250 | static void v9fs_string_init(V9fsString *str) |
251 | { | |
252 | str->data = NULL; | |
253 | str->size = 0; | |
254 | } | |
255 | ||
256 | static void v9fs_string_free(V9fsString *str) | |
257 | { | |
258 | qemu_free(str->data); | |
259 | str->data = NULL; | |
260 | str->size = 0; | |
261 | } | |
262 | ||
263 | static void v9fs_string_null(V9fsString *str) | |
264 | { | |
265 | v9fs_string_free(str); | |
266 | } | |
267 | ||
268 | static int number_to_string(void *arg, char type) | |
269 | { | |
270 | unsigned int ret = 0; | |
271 | ||
272 | switch (type) { | |
273 | case 'u': { | |
274 | unsigned int num = *(unsigned int *)arg; | |
275 | ||
276 | do { | |
277 | ret++; | |
278 | num = num/10; | |
279 | } while (num); | |
280 | break; | |
281 | } | |
282 | default: | |
283 | printf("Number_to_string: Unknown number format\n"); | |
284 | return -1; | |
285 | } | |
286 | ||
287 | return ret; | |
288 | } | |
289 | ||
290 | static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
291 | { | |
292 | va_list ap2; | |
293 | char *iter = (char *)fmt; | |
294 | int len = 0; | |
295 | int nr_args = 0; | |
296 | char *arg_char_ptr; | |
297 | unsigned int arg_uint; | |
298 | ||
299 | /* Find the number of %'s that denotes an argument */ | |
300 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
301 | nr_args++; | |
302 | iter++; | |
303 | } | |
304 | ||
305 | len = strlen(fmt) - 2*nr_args; | |
306 | ||
307 | if (!nr_args) { | |
308 | goto alloc_print; | |
309 | } | |
310 | ||
311 | va_copy(ap2, ap); | |
312 | ||
313 | iter = (char *)fmt; | |
314 | ||
315 | /* Now parse the format string */ | |
316 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
317 | iter++; | |
318 | switch (*iter) { | |
319 | case 'u': | |
320 | arg_uint = va_arg(ap2, unsigned int); | |
321 | len += number_to_string((void *)&arg_uint, 'u'); | |
322 | break; | |
323 | case 's': | |
324 | arg_char_ptr = va_arg(ap2, char *); | |
325 | len += strlen(arg_char_ptr); | |
326 | break; | |
327 | case 'c': | |
328 | len += 1; | |
329 | break; | |
330 | default: | |
331 | fprintf(stderr, | |
332 | "v9fs_string_alloc_printf:Incorrect format %c", *iter); | |
333 | return -1; | |
334 | } | |
335 | iter++; | |
336 | } | |
337 | ||
338 | alloc_print: | |
339 | *strp = qemu_malloc((len + 1) * sizeof(**strp)); | |
340 | ||
341 | return vsprintf(*strp, fmt, ap); | |
342 | } | |
343 | ||
344 | static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
345 | { | |
346 | va_list ap; | |
347 | int err; | |
348 | ||
349 | v9fs_string_free(str); | |
350 | ||
351 | va_start(ap, fmt); | |
352 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
353 | BUG_ON(err == -1); | |
354 | va_end(ap); | |
355 | ||
356 | str->size = err; | |
357 | } | |
358 | ||
359 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
360 | { | |
361 | v9fs_string_free(lhs); | |
362 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
363 | } | |
364 | ||
365 | static size_t v9fs_string_size(V9fsString *str) | |
366 | { | |
367 | return str->size; | |
368 | } | |
369 | ||
286d5652 AL |
370 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
371 | { | |
372 | V9fsFidState *f; | |
373 | ||
374 | for (f = s->fid_list; f; f = f->next) { | |
375 | if (f->fid == fid) { | |
286d5652 AL |
376 | return f; |
377 | } | |
378 | } | |
379 | ||
380 | return NULL; | |
381 | } | |
382 | ||
383 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
384 | { | |
385 | V9fsFidState *f; | |
386 | ||
387 | f = lookup_fid(s, fid); | |
388 | if (f) { | |
389 | return NULL; | |
390 | } | |
391 | ||
392 | f = qemu_mallocz(sizeof(V9fsFidState)); | |
393 | ||
394 | f->fid = fid; | |
395 | f->fd = -1; | |
396 | f->dir = NULL; | |
397 | ||
398 | f->next = s->fid_list; | |
399 | s->fid_list = f; | |
400 | ||
401 | return f; | |
402 | } | |
403 | ||
404 | static int free_fid(V9fsState *s, int32_t fid) | |
405 | { | |
406 | V9fsFidState **fidpp, *fidp; | |
407 | ||
408 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
409 | if ((*fidpp)->fid == fid) { | |
410 | break; | |
411 | } | |
412 | } | |
413 | ||
414 | if (*fidpp == NULL) { | |
415 | return -ENOENT; | |
416 | } | |
417 | ||
418 | fidp = *fidpp; | |
419 | *fidpp = fidp->next; | |
420 | ||
421 | if (fidp->fd != -1) { | |
422 | v9fs_do_close(s, fidp->fd); | |
423 | } | |
424 | if (fidp->dir) { | |
425 | v9fs_do_closedir(s, fidp->dir); | |
426 | } | |
427 | v9fs_string_free(&fidp->path); | |
428 | qemu_free(fidp); | |
429 | ||
430 | return 0; | |
431 | } | |
432 | ||
433 | #define P9_QID_TYPE_DIR 0x80 | |
434 | #define P9_QID_TYPE_SYMLINK 0x02 | |
435 | ||
436 | #define P9_STAT_MODE_DIR 0x80000000 | |
437 | #define P9_STAT_MODE_APPEND 0x40000000 | |
438 | #define P9_STAT_MODE_EXCL 0x20000000 | |
439 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
440 | #define P9_STAT_MODE_AUTH 0x08000000 | |
441 | #define P9_STAT_MODE_TMP 0x04000000 | |
442 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
443 | #define P9_STAT_MODE_LINK 0x01000000 | |
444 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
445 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
446 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
447 | #define P9_STAT_MODE_SETUID 0x00080000 | |
448 | #define P9_STAT_MODE_SETGID 0x00040000 | |
449 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
450 | ||
451 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
452 | P9_STAT_MODE_SYMLINK | \ | |
453 | P9_STAT_MODE_LINK | \ | |
454 | P9_STAT_MODE_DEVICE | \ | |
455 | P9_STAT_MODE_NAMED_PIPE | \ | |
456 | P9_STAT_MODE_SOCKET) | |
457 | ||
458 | /* This is the algorithm from ufs in spfs */ | |
459 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
460 | { | |
461 | size_t size; | |
462 | ||
463 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
464 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
465 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
466 | qidp->type = 0; | |
467 | if (S_ISDIR(stbuf->st_mode)) { | |
468 | qidp->type |= P9_QID_TYPE_DIR; | |
469 | } | |
470 | if (S_ISLNK(stbuf->st_mode)) { | |
471 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
472 | } | |
473 | } | |
474 | ||
475 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
476 | { | |
477 | struct stat stbuf; | |
478 | int err; | |
479 | ||
480 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
481 | if (err) { | |
482 | return err; | |
483 | } | |
484 | ||
485 | stat_to_qid(&stbuf, qidp); | |
486 | return 0; | |
487 | } | |
488 | ||
9f107513 AL |
489 | static V9fsPDU *alloc_pdu(V9fsState *s) |
490 | { | |
491 | V9fsPDU *pdu = NULL; | |
492 | ||
493 | if (!QLIST_EMPTY(&s->free_list)) { | |
494 | pdu = QLIST_FIRST(&s->free_list); | |
495 | QLIST_REMOVE(pdu, next); | |
496 | } | |
497 | return pdu; | |
498 | } | |
499 | ||
500 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
501 | { | |
502 | if (pdu) { | |
503 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
504 | } | |
505 | } | |
506 | ||
507 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
508 | size_t offset, size_t size, int pack) | |
509 | { | |
510 | int i = 0; | |
511 | size_t copied = 0; | |
512 | ||
513 | for (i = 0; size && i < sg_count; i++) { | |
514 | size_t len; | |
515 | if (offset >= sg[i].iov_len) { | |
516 | /* skip this sg */ | |
517 | offset -= sg[i].iov_len; | |
518 | continue; | |
519 | } else { | |
520 | len = MIN(sg[i].iov_len - offset, size); | |
521 | if (pack) { | |
522 | memcpy(sg[i].iov_base + offset, addr, len); | |
523 | } else { | |
524 | memcpy(addr, sg[i].iov_base + offset, len); | |
525 | } | |
526 | size -= len; | |
527 | copied += len; | |
528 | addr += len; | |
529 | if (size) { | |
530 | offset = 0; | |
531 | continue; | |
532 | } | |
533 | } | |
534 | } | |
535 | ||
536 | return copied; | |
537 | } | |
538 | ||
405a549a AL |
539 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
540 | { | |
541 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
542 | offset, size, 0); | |
543 | } | |
544 | ||
545 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
546 | size_t size) | |
547 | { | |
548 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
549 | offset, size, 1); | |
550 | } | |
551 | ||
552 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
553 | { | |
554 | size_t pos = 0; | |
555 | int i, j; | |
556 | struct iovec *src_sg; | |
557 | unsigned int num; | |
558 | ||
559 | if (rx) { | |
560 | src_sg = pdu->elem.in_sg; | |
561 | num = pdu->elem.in_num; | |
562 | } else { | |
563 | src_sg = pdu->elem.out_sg; | |
564 | num = pdu->elem.out_num; | |
565 | } | |
566 | ||
567 | j = 0; | |
568 | for (i = 0; i < num; i++) { | |
569 | if (offset <= pos) { | |
570 | sg[j].iov_base = src_sg[i].iov_base; | |
571 | sg[j].iov_len = src_sg[i].iov_len; | |
572 | j++; | |
573 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
574 | sg[j].iov_base = src_sg[i].iov_base; | |
575 | sg[j].iov_len = src_sg[i].iov_len; | |
576 | sg[j].iov_base += (offset - pos); | |
577 | sg[j].iov_len -= (offset - pos); | |
578 | j++; | |
579 | } | |
580 | pos += src_sg[i].iov_len; | |
581 | } | |
582 | ||
583 | return j; | |
584 | } | |
585 | ||
586 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
587 | { | |
588 | size_t old_offset = offset; | |
589 | va_list ap; | |
590 | int i; | |
591 | ||
592 | va_start(ap, fmt); | |
593 | for (i = 0; fmt[i]; i++) { | |
594 | switch (fmt[i]) { | |
595 | case 'b': { | |
596 | uint8_t *valp = va_arg(ap, uint8_t *); | |
597 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
598 | break; | |
599 | } | |
600 | case 'w': { | |
601 | uint16_t val, *valp; | |
602 | valp = va_arg(ap, uint16_t *); | |
603 | val = le16_to_cpupu(valp); | |
604 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
605 | *valp = val; | |
606 | break; | |
607 | } | |
608 | case 'd': { | |
609 | uint32_t val, *valp; | |
610 | valp = va_arg(ap, uint32_t *); | |
611 | val = le32_to_cpupu(valp); | |
612 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
613 | *valp = val; | |
614 | break; | |
615 | } | |
616 | case 'q': { | |
617 | uint64_t val, *valp; | |
618 | valp = va_arg(ap, uint64_t *); | |
619 | val = le64_to_cpup(valp); | |
620 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
621 | *valp = val; | |
622 | break; | |
623 | } | |
624 | case 'v': { | |
625 | struct iovec *iov = va_arg(ap, struct iovec *); | |
626 | int *iovcnt = va_arg(ap, int *); | |
627 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
628 | break; | |
629 | } | |
630 | case 's': { | |
631 | V9fsString *str = va_arg(ap, V9fsString *); | |
632 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
633 | /* FIXME: sanity check str->size */ | |
634 | str->data = qemu_malloc(str->size + 1); | |
635 | offset += pdu_unpack(str->data, pdu, offset, str->size); | |
636 | str->data[str->size] = 0; | |
637 | break; | |
638 | } | |
639 | case 'Q': { | |
640 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
641 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
642 | &qidp->type, &qidp->version, &qidp->path); | |
643 | break; | |
644 | } | |
645 | case 'S': { | |
646 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
647 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
648 | &statp->size, &statp->type, &statp->dev, | |
649 | &statp->qid, &statp->mode, &statp->atime, | |
650 | &statp->mtime, &statp->length, | |
651 | &statp->name, &statp->uid, &statp->gid, | |
652 | &statp->muid, &statp->extension, | |
653 | &statp->n_uid, &statp->n_gid, | |
654 | &statp->n_muid); | |
655 | break; | |
656 | } | |
657 | default: | |
658 | break; | |
659 | } | |
660 | } | |
661 | ||
662 | va_end(ap); | |
663 | ||
664 | return offset - old_offset; | |
665 | } | |
666 | ||
667 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
668 | { | |
669 | size_t old_offset = offset; | |
670 | va_list ap; | |
671 | int i; | |
672 | ||
673 | va_start(ap, fmt); | |
674 | for (i = 0; fmt[i]; i++) { | |
675 | switch (fmt[i]) { | |
676 | case 'b': { | |
677 | uint8_t val = va_arg(ap, int); | |
678 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
679 | break; | |
680 | } | |
681 | case 'w': { | |
682 | uint16_t val; | |
683 | cpu_to_le16w(&val, va_arg(ap, int)); | |
684 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
685 | break; | |
686 | } | |
687 | case 'd': { | |
688 | uint32_t val; | |
689 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
690 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
691 | break; | |
692 | } | |
693 | case 'q': { | |
694 | uint64_t val; | |
695 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
696 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
697 | break; | |
698 | } | |
699 | case 'v': { | |
700 | struct iovec *iov = va_arg(ap, struct iovec *); | |
701 | int *iovcnt = va_arg(ap, int *); | |
702 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
703 | break; | |
704 | } | |
705 | case 's': { | |
706 | V9fsString *str = va_arg(ap, V9fsString *); | |
707 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
708 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
709 | break; | |
710 | } | |
711 | case 'Q': { | |
712 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
713 | offset += pdu_marshal(pdu, offset, "bdq", | |
714 | qidp->type, qidp->version, qidp->path); | |
715 | break; | |
716 | } | |
717 | case 'S': { | |
718 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
719 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
720 | statp->size, statp->type, statp->dev, | |
721 | &statp->qid, statp->mode, statp->atime, | |
722 | statp->mtime, statp->length, &statp->name, | |
723 | &statp->uid, &statp->gid, &statp->muid, | |
724 | &statp->extension, statp->n_uid, | |
725 | statp->n_gid, statp->n_muid); | |
726 | break; | |
727 | } | |
728 | default: | |
729 | break; | |
730 | } | |
731 | } | |
732 | va_end(ap); | |
733 | ||
734 | return offset - old_offset; | |
735 | } | |
736 | ||
737 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
738 | { | |
739 | int8_t id = pdu->id + 1; /* Response */ | |
740 | ||
741 | if (len < 0) { | |
742 | V9fsString str; | |
743 | int err = -len; | |
744 | ||
745 | str.data = strerror(err); | |
746 | str.size = strlen(str.data); | |
747 | ||
748 | len = 7; | |
749 | len += pdu_marshal(pdu, len, "s", &str); | |
750 | if (dotu) { | |
751 | len += pdu_marshal(pdu, len, "d", err); | |
752 | } | |
753 | ||
754 | id = P9_RERROR; | |
755 | } | |
756 | ||
757 | /* fill out the header */ | |
758 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
759 | ||
760 | /* keep these in sync */ | |
761 | pdu->size = len; | |
762 | pdu->id = id; | |
763 | ||
764 | /* push onto queue and notify */ | |
765 | virtqueue_push(s->vq, &pdu->elem, len); | |
766 | ||
767 | /* FIXME: we should batch these completions */ | |
768 | virtio_notify(&s->vdev, s->vq); | |
769 | ||
770 | free_pdu(s, pdu); | |
771 | } | |
772 | ||
bb9e3216 AL |
773 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
774 | { | |
775 | mode_t ret; | |
776 | ||
777 | ret = mode & 0777; | |
778 | if (mode & P9_STAT_MODE_DIR) { | |
779 | ret |= S_IFDIR; | |
780 | } | |
781 | ||
782 | if (dotu) { | |
783 | if (mode & P9_STAT_MODE_SYMLINK) { | |
784 | ret |= S_IFLNK; | |
785 | } | |
786 | if (mode & P9_STAT_MODE_SOCKET) { | |
787 | ret |= S_IFSOCK; | |
788 | } | |
789 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
790 | ret |= S_IFIFO; | |
791 | } | |
792 | if (mode & P9_STAT_MODE_DEVICE) { | |
793 | if (extension && extension->data[0] == 'c') { | |
794 | ret |= S_IFCHR; | |
795 | } else { | |
796 | ret |= S_IFBLK; | |
797 | } | |
798 | } | |
799 | } | |
800 | ||
801 | if (!(ret&~0777)) { | |
802 | ret |= S_IFREG; | |
803 | } | |
804 | ||
805 | if (mode & P9_STAT_MODE_SETUID) { | |
806 | ret |= S_ISUID; | |
807 | } | |
808 | if (mode & P9_STAT_MODE_SETGID) { | |
809 | ret |= S_ISGID; | |
810 | } | |
811 | if (mode & P9_STAT_MODE_SETVTX) { | |
812 | ret |= S_ISVTX; | |
813 | } | |
814 | ||
815 | return ret; | |
816 | } | |
817 | ||
818 | static int donttouch_stat(V9fsStat *stat) | |
819 | { | |
820 | if (stat->type == -1 && | |
821 | stat->dev == -1 && | |
822 | stat->qid.type == -1 && | |
823 | stat->qid.version == -1 && | |
824 | stat->qid.path == -1 && | |
825 | stat->mode == -1 && | |
826 | stat->atime == -1 && | |
827 | stat->mtime == -1 && | |
828 | stat->length == -1 && | |
829 | !stat->name.size && | |
830 | !stat->uid.size && | |
831 | !stat->gid.size && | |
832 | !stat->muid.size && | |
833 | stat->n_uid == -1 && | |
834 | stat->n_gid == -1 && | |
835 | stat->n_muid == -1) { | |
836 | return 1; | |
837 | } | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
842 | static void v9fs_stat_free(V9fsStat *stat) | |
843 | { | |
844 | v9fs_string_free(&stat->name); | |
845 | v9fs_string_free(&stat->uid); | |
846 | v9fs_string_free(&stat->gid); | |
847 | v9fs_string_free(&stat->muid); | |
848 | v9fs_string_free(&stat->extension); | |
849 | } | |
850 | ||
851 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
852 | { | |
853 | uint32_t mode; | |
854 | ||
855 | mode = stbuf->st_mode & 0777; | |
856 | if (S_ISDIR(stbuf->st_mode)) { | |
857 | mode |= P9_STAT_MODE_DIR; | |
858 | } | |
859 | ||
860 | if (dotu) { | |
861 | if (S_ISLNK(stbuf->st_mode)) { | |
862 | mode |= P9_STAT_MODE_SYMLINK; | |
863 | } | |
864 | ||
865 | if (S_ISSOCK(stbuf->st_mode)) { | |
866 | mode |= P9_STAT_MODE_SOCKET; | |
867 | } | |
868 | ||
869 | if (S_ISFIFO(stbuf->st_mode)) { | |
870 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
871 | } | |
872 | ||
873 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { | |
874 | mode |= P9_STAT_MODE_DEVICE; | |
875 | } | |
876 | ||
877 | if (stbuf->st_mode & S_ISUID) { | |
878 | mode |= P9_STAT_MODE_SETUID; | |
879 | } | |
880 | ||
881 | if (stbuf->st_mode & S_ISGID) { | |
882 | mode |= P9_STAT_MODE_SETGID; | |
883 | } | |
884 | ||
885 | if (stbuf->st_mode & S_ISVTX) { | |
886 | mode |= P9_STAT_MODE_SETVTX; | |
887 | } | |
888 | } | |
889 | ||
890 | return mode; | |
891 | } | |
892 | ||
893 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
894 | const struct stat *stbuf, | |
895 | V9fsStat *v9stat) | |
896 | { | |
897 | int err; | |
898 | const char *str; | |
899 | ||
900 | memset(v9stat, 0, sizeof(*v9stat)); | |
901 | ||
902 | stat_to_qid(stbuf, &v9stat->qid); | |
903 | v9stat->mode = stat_to_v9mode(stbuf); | |
904 | v9stat->atime = stbuf->st_atime; | |
905 | v9stat->mtime = stbuf->st_mtime; | |
906 | v9stat->length = stbuf->st_size; | |
907 | ||
908 | v9fs_string_null(&v9stat->uid); | |
909 | v9fs_string_null(&v9stat->gid); | |
910 | v9fs_string_null(&v9stat->muid); | |
911 | ||
912 | if (dotu) { | |
913 | v9stat->n_uid = stbuf->st_uid; | |
914 | v9stat->n_gid = stbuf->st_gid; | |
915 | v9stat->n_muid = 0; | |
916 | ||
917 | v9fs_string_null(&v9stat->extension); | |
918 | ||
919 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { | |
920 | err = v9fs_do_readlink(s, name, &v9stat->extension); | |
921 | if (err == -1) { | |
922 | err = -errno; | |
923 | return err; | |
924 | } | |
925 | v9stat->extension.data[err] = 0; | |
926 | v9stat->extension.size = err; | |
927 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { | |
928 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
929 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
930 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
931 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
932 | v9fs_string_sprintf(&v9stat->extension, "%s %u", | |
933 | "HARDLINKCOUNT", stbuf->st_nlink); | |
934 | } | |
935 | } | |
936 | ||
937 | str = strrchr(name->data, '/'); | |
938 | if (str) { | |
939 | str += 1; | |
940 | } else { | |
941 | str = name->data; | |
942 | } | |
943 | ||
944 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
945 | ||
946 | v9stat->size = 61 + | |
947 | v9fs_string_size(&v9stat->name) + | |
948 | v9fs_string_size(&v9stat->uid) + | |
949 | v9fs_string_size(&v9stat->gid) + | |
950 | v9fs_string_size(&v9stat->muid) + | |
951 | v9fs_string_size(&v9stat->extension); | |
952 | return 0; | |
953 | } | |
954 | ||
1f5a89bf AL |
955 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
956 | { | |
957 | while (len && *iovcnt) { | |
958 | if (len < sg->iov_len) { | |
959 | sg->iov_len -= len; | |
960 | sg->iov_base += len; | |
961 | len = 0; | |
962 | } else { | |
963 | len -= sg->iov_len; | |
964 | sg++; | |
965 | *iovcnt -= 1; | |
966 | } | |
967 | } | |
968 | ||
969 | return sg; | |
970 | } | |
971 | ||
972 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
973 | { | |
974 | int i; | |
975 | int total = 0; | |
976 | ||
977 | for (i = 0; i < *cnt; i++) { | |
978 | if ((total + sg[i].iov_len) > cap) { | |
979 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
980 | i++; | |
981 | break; | |
982 | } | |
983 | total += sg[i].iov_len; | |
984 | } | |
985 | ||
986 | *cnt = i; | |
987 | ||
988 | return sg; | |
989 | } | |
990 | ||
991 | static void print_sg(struct iovec *sg, int cnt) | |
992 | { | |
993 | int i; | |
994 | ||
995 | printf("sg[%d]: {", cnt); | |
996 | for (i = 0; i < cnt; i++) { | |
997 | if (i) { | |
998 | printf(", "); | |
999 | } | |
1000 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1001 | } | |
1002 | printf("}\n"); | |
1003 | } | |
1004 | ||
8cf89e00 AL |
1005 | static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1006 | { | |
1007 | V9fsString str; | |
1008 | v9fs_string_init(&str); | |
1009 | v9fs_string_copy(&str, dst); | |
1010 | v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len); | |
1011 | v9fs_string_free(&str); | |
1012 | } | |
1013 | ||
9f107513 AL |
1014 | static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1015 | { | |
92c1ad03 AL |
1016 | int32_t msize; |
1017 | V9fsString version; | |
1018 | size_t offset = 7; | |
1019 | ||
1020 | pdu_unmarshal(pdu, offset, "ds", &msize, &version); | |
1021 | ||
1022 | if (strcmp(version.data, "9P2000.u")) { | |
1023 | v9fs_string_sprintf(&version, "unknown"); | |
9f107513 | 1024 | } |
92c1ad03 AL |
1025 | |
1026 | offset += pdu_marshal(pdu, offset, "ds", msize, &version); | |
1027 | complete_pdu(s, pdu, offset); | |
1028 | ||
1029 | v9fs_string_free(&version); | |
9f107513 AL |
1030 | } |
1031 | ||
1032 | static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) | |
1033 | { | |
955efc47 AL |
1034 | int32_t fid, afid, n_uname; |
1035 | V9fsString uname, aname; | |
1036 | V9fsFidState *fidp; | |
1037 | V9fsQID qid; | |
1038 | size_t offset = 7; | |
1039 | ssize_t err; | |
1040 | ||
1041 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
1042 | ||
1043 | fidp = alloc_fid(s, fid); | |
1044 | if (fidp == NULL) { | |
1045 | err = -EINVAL; | |
1046 | goto out; | |
9f107513 | 1047 | } |
955efc47 AL |
1048 | |
1049 | fidp->uid = n_uname; | |
1050 | ||
1051 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
1052 | err = fid_to_qid(s, fidp, &qid); | |
1053 | if (err) { | |
1054 | err = -EINVAL; | |
1055 | free_fid(s, fid); | |
1056 | goto out; | |
1057 | } | |
1058 | ||
1059 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
1060 | ||
1061 | err = offset; | |
1062 | out: | |
1063 | complete_pdu(s, pdu, err); | |
1064 | v9fs_string_free(&uname); | |
1065 | v9fs_string_free(&aname); | |
9f107513 AL |
1066 | } |
1067 | ||
4da7d3fa AL |
1068 | static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1069 | { | |
1070 | if (err == -1) { | |
1071 | err = -errno; | |
1072 | goto out; | |
1073 | } | |
1074 | ||
1075 | err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); | |
1076 | if (err) { | |
1077 | goto out; | |
1078 | } | |
1079 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); | |
1080 | err = vs->offset; | |
1081 | ||
1082 | out: | |
1083 | complete_pdu(s, vs->pdu, err); | |
1084 | v9fs_stat_free(&vs->v9stat); | |
1085 | qemu_free(vs); | |
1086 | } | |
1087 | ||
9f107513 AL |
1088 | static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1089 | { | |
4da7d3fa AL |
1090 | int32_t fid; |
1091 | V9fsStatState *vs; | |
1092 | ssize_t err = 0; | |
1093 | ||
1094 | vs = qemu_malloc(sizeof(*vs)); | |
1095 | vs->pdu = pdu; | |
1096 | vs->offset = 7; | |
1097 | ||
1098 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1099 | ||
1100 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1101 | ||
1102 | vs->fidp = lookup_fid(s, fid); | |
1103 | if (vs->fidp == NULL) { | |
1104 | err = -ENOENT; | |
1105 | goto out; | |
9f107513 | 1106 | } |
4da7d3fa AL |
1107 | |
1108 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1109 | v9fs_stat_post_lstat(s, vs, err); | |
1110 | return; | |
1111 | ||
1112 | out: | |
1113 | complete_pdu(s, vs->pdu, err); | |
1114 | v9fs_stat_free(&vs->v9stat); | |
1115 | qemu_free(vs); | |
9f107513 AL |
1116 | } |
1117 | ||
ff5e54c9 AL |
1118 | static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1119 | { | |
1120 | complete_pdu(s, vs->pdu, err); | |
1121 | ||
1122 | if (vs->nwnames) { | |
1123 | for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { | |
1124 | v9fs_string_free(&vs->wnames[vs->name_idx]); | |
1125 | } | |
1126 | ||
1127 | qemu_free(vs->wnames); | |
1128 | qemu_free(vs->qids); | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | static void v9fs_walk_marshal(V9fsWalkState *vs) | |
1133 | { | |
1134 | int i; | |
1135 | vs->offset = 7; | |
1136 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames); | |
1137 | ||
1138 | for (i = 0; i < vs->nwnames; i++) { | |
1139 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]); | |
1140 | } | |
1141 | } | |
1142 | ||
1143 | static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1144 | int err) | |
1145 | { | |
1146 | if (err == -1) { | |
1147 | free_fid(s, vs->newfidp->fid); | |
1148 | v9fs_string_free(&vs->path); | |
1149 | err = -ENOENT; | |
1150 | goto out; | |
1151 | } | |
1152 | ||
1153 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1154 | ||
1155 | vs->name_idx++; | |
1156 | if (vs->name_idx < vs->nwnames) { | |
1157 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1158 | vs->wnames[vs->name_idx].data); | |
1159 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1160 | ||
1161 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1162 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1163 | return; | |
1164 | } | |
1165 | ||
1166 | v9fs_string_free(&vs->path); | |
1167 | v9fs_walk_marshal(vs); | |
1168 | err = vs->offset; | |
1169 | out: | |
1170 | v9fs_walk_complete(s, vs, err); | |
1171 | } | |
1172 | ||
1173 | static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1174 | int err) | |
1175 | { | |
1176 | if (err == -1) { | |
1177 | v9fs_string_free(&vs->path); | |
1178 | err = -ENOENT; | |
1179 | goto out; | |
1180 | } | |
1181 | ||
1182 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1183 | vs->name_idx++; | |
1184 | if (vs->name_idx < vs->nwnames) { | |
1185 | ||
1186 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1187 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1188 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1189 | ||
1190 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1191 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1192 | return; | |
1193 | } | |
1194 | ||
1195 | v9fs_string_free(&vs->path); | |
1196 | v9fs_walk_marshal(vs); | |
1197 | err = vs->offset; | |
1198 | out: | |
1199 | v9fs_walk_complete(s, vs, err); | |
1200 | } | |
1201 | ||
9f107513 AL |
1202 | static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1203 | { | |
ff5e54c9 AL |
1204 | int32_t fid, newfid; |
1205 | V9fsWalkState *vs; | |
1206 | int err = 0; | |
1207 | int i; | |
1208 | ||
1209 | vs = qemu_malloc(sizeof(*vs)); | |
1210 | vs->pdu = pdu; | |
1211 | vs->wnames = NULL; | |
1212 | vs->qids = NULL; | |
1213 | vs->offset = 7; | |
1214 | ||
1215 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid, | |
1216 | &newfid, &vs->nwnames); | |
1217 | ||
1218 | if (vs->nwnames) { | |
1219 | vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); | |
1220 | ||
1221 | vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); | |
1222 | ||
1223 | for (i = 0; i < vs->nwnames; i++) { | |
1224 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s", | |
1225 | &vs->wnames[i]); | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | vs->fidp = lookup_fid(s, fid); | |
1230 | if (vs->fidp == NULL) { | |
1231 | err = -ENOENT; | |
1232 | goto out; | |
1233 | } | |
1234 | ||
1235 | /* FIXME: is this really valid? */ | |
1236 | if (fid == newfid) { | |
1237 | ||
1238 | BUG_ON(vs->fidp->fd != -1); | |
1239 | BUG_ON(vs->fidp->dir); | |
1240 | v9fs_string_init(&vs->path); | |
1241 | vs->name_idx = 0; | |
1242 | ||
1243 | if (vs->name_idx < vs->nwnames) { | |
1244 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1245 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1246 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1247 | ||
1248 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1249 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1250 | return; | |
1251 | } | |
1252 | } else { | |
1253 | vs->newfidp = alloc_fid(s, newfid); | |
1254 | if (vs->newfidp == NULL) { | |
1255 | err = -EINVAL; | |
1256 | goto out; | |
1257 | } | |
1258 | ||
1259 | vs->newfidp->uid = vs->fidp->uid; | |
1260 | v9fs_string_init(&vs->path); | |
1261 | vs->name_idx = 0; | |
1262 | v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); | |
1263 | ||
1264 | if (vs->name_idx < vs->nwnames) { | |
1265 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1266 | vs->wnames[vs->name_idx].data); | |
1267 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1268 | ||
1269 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1270 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1271 | return; | |
1272 | } | |
9f107513 | 1273 | } |
ff5e54c9 AL |
1274 | |
1275 | v9fs_walk_marshal(vs); | |
1276 | err = vs->offset; | |
1277 | out: | |
1278 | v9fs_walk_complete(s, vs, err); | |
9f107513 AL |
1279 | } |
1280 | ||
a6568fe2 AL |
1281 | static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1282 | { | |
1283 | if (vs->fidp->dir == NULL) { | |
1284 | err = -errno; | |
1285 | goto out; | |
1286 | } | |
1287 | ||
1288 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1289 | err = vs->offset; | |
1290 | out: | |
1291 | complete_pdu(s, vs->pdu, err); | |
1292 | qemu_free(vs); | |
1293 | ||
1294 | } | |
1295 | ||
1296 | static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) | |
1297 | { | |
1298 | if (vs->fidp->fd == -1) { | |
1299 | err = -errno; | |
1300 | goto out; | |
1301 | } | |
1302 | ||
1303 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1304 | err = vs->offset; | |
1305 | out: | |
1306 | complete_pdu(s, vs->pdu, err); | |
1307 | qemu_free(vs); | |
1308 | } | |
1309 | ||
1310 | static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) | |
1311 | { | |
1312 | if (err) { | |
1313 | err = -errno; | |
1314 | goto out; | |
1315 | } | |
1316 | ||
1317 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1318 | ||
1319 | if (S_ISDIR(vs->stbuf.st_mode)) { | |
1320 | vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path); | |
1321 | v9fs_open_post_opendir(s, vs, err); | |
1322 | } else { | |
1323 | vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, | |
1324 | omode_to_uflags(vs->mode)); | |
1325 | v9fs_open_post_open(s, vs, err); | |
1326 | } | |
1327 | return; | |
1328 | out: | |
1329 | complete_pdu(s, vs->pdu, err); | |
1330 | qemu_free(vs); | |
9f107513 AL |
1331 | } |
1332 | ||
1333 | static void v9fs_open(V9fsState *s, V9fsPDU *pdu) | |
a6568fe2 AL |
1334 | { |
1335 | int32_t fid; | |
1336 | V9fsOpenState *vs; | |
1337 | ssize_t err = 0; | |
1338 | ||
1339 | ||
1340 | vs = qemu_malloc(sizeof(*vs)); | |
1341 | vs->pdu = pdu; | |
1342 | vs->offset = 7; | |
1343 | ||
1344 | pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode); | |
1345 | ||
1346 | vs->fidp = lookup_fid(s, fid); | |
1347 | if (vs->fidp == NULL) { | |
1348 | err = -ENOENT; | |
1349 | goto out; | |
1350 | } | |
1351 | ||
1352 | BUG_ON(vs->fidp->fd != -1); | |
1353 | BUG_ON(vs->fidp->dir); | |
1354 | ||
1355 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1356 | ||
1357 | v9fs_open_post_lstat(s, vs, err); | |
1358 | return; | |
1359 | out: | |
1360 | complete_pdu(s, pdu, err); | |
1361 | qemu_free(vs); | |
1362 | } | |
1363 | ||
1364 | static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) | |
1365 | { | |
bbd5697b AL |
1366 | int32_t fid; |
1367 | size_t offset = 7; | |
1368 | int err; | |
1369 | ||
1370 | pdu_unmarshal(pdu, offset, "d", &fid); | |
1371 | ||
1372 | err = free_fid(s, fid); | |
1373 | if (err < 0) { | |
1374 | goto out; | |
a6568fe2 | 1375 | } |
bbd5697b AL |
1376 | |
1377 | offset = 7; | |
1378 | err = offset; | |
1379 | out: | |
1380 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1381 | } |
1382 | ||
a9231555 AL |
1383 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1384 | ||
1385 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1386 | { | |
1387 | if (err) { | |
1388 | goto out; | |
1389 | } | |
1390 | v9fs_stat_free(&vs->v9stat); | |
1391 | v9fs_string_free(&vs->name); | |
1392 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1393 | vs->offset += vs->count; | |
1394 | err = vs->offset; | |
1395 | out: | |
1396 | complete_pdu(s, vs->pdu, err); | |
1397 | qemu_free(vs); | |
1398 | return; | |
1399 | } | |
1400 | ||
1401 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1402 | ssize_t err) | |
1403 | { | |
1404 | if (err) { | |
1405 | err = -errno; | |
1406 | goto out; | |
1407 | } | |
1408 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1409 | if (err) { | |
1410 | goto out; | |
1411 | } | |
1412 | ||
1413 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1414 | &vs->v9stat); | |
1415 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1416 | ((vs->count + vs->len) > vs->max_count)) { | |
1417 | v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); | |
1418 | v9fs_read_post_seekdir(s, vs, err); | |
1419 | return; | |
1420 | } | |
1421 | vs->count += vs->len; | |
1422 | v9fs_stat_free(&vs->v9stat); | |
1423 | v9fs_string_free(&vs->name); | |
1424 | vs->dir_pos = vs->dent->d_off; | |
1425 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
1426 | v9fs_read_post_readdir(s, vs, err); | |
1427 | return; | |
1428 | out: | |
1429 | v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); | |
1430 | v9fs_read_post_seekdir(s, vs, err); | |
1431 | return; | |
1432 | ||
1433 | } | |
1434 | ||
1435 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1436 | { | |
1437 | if (vs->dent) { | |
1438 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1439 | v9fs_string_init(&vs->name); | |
1440 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1441 | vs->dent->d_name); | |
1442 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1443 | v9fs_read_post_dir_lstat(s, vs, err); | |
1444 | return; | |
1445 | } | |
1446 | ||
1447 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1448 | vs->offset += vs->count; | |
1449 | err = vs->offset; | |
1450 | complete_pdu(s, vs->pdu, err); | |
1451 | qemu_free(vs); | |
1452 | return; | |
1453 | } | |
1454 | ||
1455 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1456 | { | |
1457 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
1458 | v9fs_read_post_readdir(s, vs, err); | |
1459 | return; | |
1460 | } | |
1461 | ||
1462 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1463 | ssize_t err) | |
1464 | { | |
1465 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir); | |
1466 | v9fs_read_post_telldir(s, vs, err); | |
1467 | return; | |
1468 | } | |
1469 | ||
1470 | static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1471 | { | |
1472 | if (err < 0) { | |
1473 | /* IO error return the error */ | |
1474 | err = -errno; | |
1475 | goto out; | |
1476 | } | |
1477 | vs->total += vs->len; | |
1478 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1479 | if (vs->total < vs->count && vs->len > 0) { | |
1480 | do { | |
1481 | if (0) { | |
1482 | print_sg(vs->sg, vs->cnt); | |
1483 | } | |
1484 | vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1485 | } while (vs->len == -1 && errno == EINTR); | |
1486 | if (vs->len == -1) { | |
1487 | err = -errno; | |
1488 | } | |
1489 | v9fs_read_post_readv(s, vs, err); | |
1490 | return; | |
1491 | } | |
1492 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1493 | vs->offset += vs->count; | |
1494 | err = vs->offset; | |
1495 | ||
1496 | out: | |
1497 | complete_pdu(s, vs->pdu, err); | |
1498 | qemu_free(vs); | |
1499 | } | |
1500 | ||
1501 | static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1502 | { | |
1503 | if (err == -1) { | |
1504 | err = -errno; | |
1505 | goto out; | |
1506 | } | |
1507 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
1508 | ||
1509 | if (vs->total < vs->count) { | |
1510 | do { | |
1511 | if (0) { | |
1512 | print_sg(vs->sg, vs->cnt); | |
1513 | } | |
1514 | vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1515 | } while (vs->len == -1 && errno == EINTR); | |
1516 | if (vs->len == -1) { | |
1517 | err = -errno; | |
1518 | } | |
1519 | v9fs_read_post_readv(s, vs, err); | |
1520 | return; | |
1521 | } | |
1522 | out: | |
1523 | complete_pdu(s, vs->pdu, err); | |
1524 | qemu_free(vs); | |
1525 | } | |
1526 | ||
9f107513 AL |
1527 | static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
1528 | { | |
a9231555 AL |
1529 | int32_t fid; |
1530 | V9fsReadState *vs; | |
1531 | ssize_t err = 0; | |
1532 | ||
1533 | vs = qemu_malloc(sizeof(*vs)); | |
1534 | vs->pdu = pdu; | |
1535 | vs->offset = 7; | |
1536 | vs->total = 0; | |
1537 | vs->len = 0; | |
1538 | vs->count = 0; | |
1539 | ||
1540 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
1541 | ||
1542 | vs->fidp = lookup_fid(s, fid); | |
1543 | if (vs->fidp == NULL) { | |
1544 | err = -EINVAL; | |
1545 | goto out; | |
1546 | } | |
1547 | ||
1548 | if (vs->fidp->dir) { | |
1549 | vs->max_count = vs->count; | |
1550 | vs->count = 0; | |
1551 | if (vs->off == 0) { | |
1552 | v9fs_do_rewinddir(s, vs->fidp->dir); | |
1553 | } | |
1554 | v9fs_read_post_rewinddir(s, vs, err); | |
1555 | return; | |
1556 | } else if (vs->fidp->fd != -1) { | |
1557 | vs->sg = vs->iov; | |
1558 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
1559 | err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); | |
1560 | v9fs_read_post_lseek(s, vs, err); | |
1561 | return; | |
1562 | } else { | |
1563 | err = -EINVAL; | |
9f107513 | 1564 | } |
a9231555 AL |
1565 | out: |
1566 | complete_pdu(s, pdu, err); | |
1567 | qemu_free(vs); | |
9f107513 AL |
1568 | } |
1569 | ||
8449360c AL |
1570 | static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, |
1571 | ssize_t err) | |
1572 | { | |
1573 | if (err < 0) { | |
1574 | /* IO error return the error */ | |
1575 | err = -errno; | |
1576 | goto out; | |
1577 | } | |
1578 | vs->total += vs->len; | |
1579 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1580 | if (vs->total < vs->count && vs->len > 0) { | |
1581 | do { | |
1582 | if (0) { | |
1583 | print_sg(vs->sg, vs->cnt); | |
1584 | } | |
1585 | vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1586 | } while (vs->len == -1 && errno == EINTR); | |
1587 | if (vs->len == -1) { | |
1588 | err = -errno; | |
1589 | } | |
1590 | v9fs_write_post_writev(s, vs, err); | |
1591 | return; | |
1592 | } | |
1593 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1594 | ||
1595 | err = vs->offset; | |
1596 | out: | |
1597 | complete_pdu(s, vs->pdu, err); | |
1598 | qemu_free(vs); | |
1599 | } | |
1600 | ||
1601 | static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) | |
1602 | { | |
1603 | if (err == -1) { | |
1604 | err = -errno; | |
1605 | goto out; | |
1606 | } | |
1607 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
1608 | ||
1609 | if (vs->total < vs->count) { | |
1610 | do { | |
1611 | if (0) { | |
1612 | print_sg(vs->sg, vs->cnt); | |
1613 | } | |
1614 | vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1615 | } while (vs->len == -1 && errno == EINTR); | |
1616 | if (vs->len == -1) { | |
1617 | err = -errno; | |
1618 | } | |
1619 | v9fs_write_post_writev(s, vs, err); | |
1620 | return; | |
1621 | } | |
1622 | ||
1623 | out: | |
1624 | complete_pdu(s, vs->pdu, err); | |
1625 | qemu_free(vs); | |
1626 | } | |
1627 | ||
9f107513 AL |
1628 | static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
1629 | { | |
8449360c AL |
1630 | int32_t fid; |
1631 | V9fsWriteState *vs; | |
1632 | ssize_t err; | |
1633 | ||
1634 | vs = qemu_malloc(sizeof(*vs)); | |
1635 | ||
1636 | vs->pdu = pdu; | |
1637 | vs->offset = 7; | |
1638 | vs->sg = vs->iov; | |
1639 | vs->total = 0; | |
1640 | vs->len = 0; | |
1641 | ||
1642 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
1643 | vs->sg, &vs->cnt); | |
1644 | ||
1645 | vs->fidp = lookup_fid(s, fid); | |
1646 | if (vs->fidp == NULL) { | |
1647 | err = -EINVAL; | |
1648 | goto out; | |
9f107513 | 1649 | } |
8449360c AL |
1650 | |
1651 | if (vs->fidp->fd == -1) { | |
1652 | err = -EINVAL; | |
1653 | goto out; | |
1654 | } | |
1655 | ||
1656 | err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); | |
1657 | ||
1658 | v9fs_write_post_lseek(s, vs, err); | |
1659 | return; | |
1660 | ||
1661 | out: | |
1662 | complete_pdu(s, vs->pdu, err); | |
1663 | qemu_free(vs); | |
9f107513 AL |
1664 | } |
1665 | ||
c494dd6f AL |
1666 | static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) |
1667 | { | |
1668 | if (err == 0) { | |
1669 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
1670 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1671 | ||
1672 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1673 | ||
1674 | err = vs->offset; | |
1675 | } | |
1676 | ||
1677 | complete_pdu(s, vs->pdu, err); | |
1678 | v9fs_string_free(&vs->name); | |
1679 | v9fs_string_free(&vs->extension); | |
1680 | v9fs_string_free(&vs->fullname); | |
1681 | qemu_free(vs); | |
1682 | } | |
1683 | ||
1684 | static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) | |
1685 | { | |
1686 | if (err) { | |
1687 | err = -errno; | |
1688 | } | |
1689 | v9fs_post_create(s, vs, err); | |
1690 | } | |
1691 | ||
1692 | static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, | |
1693 | int err) | |
1694 | { | |
1695 | if (!vs->fidp->dir) { | |
1696 | err = -errno; | |
1697 | } | |
1698 | v9fs_post_create(s, vs, err); | |
1699 | } | |
1700 | ||
1701 | static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, | |
1702 | int err) | |
1703 | { | |
1704 | if (err) { | |
1705 | err = -errno; | |
1706 | goto out; | |
1707 | } | |
1708 | ||
1709 | vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname); | |
1710 | v9fs_create_post_opendir(s, vs, err); | |
1711 | return; | |
1712 | ||
1713 | out: | |
1714 | v9fs_post_create(s, vs, err); | |
1715 | } | |
1716 | ||
1717 | static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) | |
1718 | { | |
1719 | if (err) { | |
1720 | err = -errno; | |
1721 | goto out; | |
1722 | } | |
1723 | ||
1724 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1725 | v9fs_create_post_dir_lstat(s, vs, err); | |
1726 | return; | |
1727 | ||
1728 | out: | |
1729 | v9fs_post_create(s, vs, err); | |
1730 | } | |
1731 | ||
1732 | static void v9fs_create_post_mksock(V9fsState *s, V9fsCreateState *vs, | |
1733 | int err) | |
1734 | { | |
1735 | if (err) { | |
1736 | err = -errno; | |
1737 | goto out; | |
1738 | } | |
1739 | ||
1740 | err = v9fs_do_chmod(s, &vs->fullname, vs->perm & 0777); | |
1741 | v9fs_create_post_perms(s, vs, err); | |
1742 | return; | |
1743 | ||
1744 | out: | |
1745 | v9fs_post_create(s, vs, err); | |
1746 | } | |
1747 | ||
1748 | static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) | |
1749 | { | |
1750 | if (err) { | |
1751 | vs->fidp->fd = -1; | |
1752 | err = -errno; | |
1753 | } | |
1754 | ||
1755 | v9fs_post_create(s, vs, err); | |
1756 | return; | |
1757 | } | |
1758 | ||
1759 | static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) | |
1760 | { | |
1761 | if (vs->fidp->fd == -1) { | |
1762 | err = -errno; | |
1763 | goto out; | |
1764 | } | |
1765 | ||
1766 | err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf); | |
1767 | v9fs_create_post_fstat(s, vs, err); | |
1768 | ||
1769 | return; | |
1770 | ||
1771 | out: | |
1772 | v9fs_post_create(s, vs, err); | |
1773 | ||
1774 | } | |
1775 | ||
1776 | static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) | |
1777 | { | |
1778 | ||
1779 | if (err == 0 || errno != ENOENT) { | |
1780 | err = -errno; | |
1781 | goto out; | |
1782 | } | |
1783 | ||
1784 | if (vs->perm & P9_STAT_MODE_DIR) { | |
00ec5c37 | 1785 | err = v9fs_do_mkdir(s, vs); |
c494dd6f AL |
1786 | v9fs_create_post_mkdir(s, vs, err); |
1787 | } else if (vs->perm & P9_STAT_MODE_SYMLINK) { | |
1788 | err = v9fs_do_symlink(s, &vs->extension, &vs->fullname); | |
1789 | v9fs_create_post_perms(s, vs, err); | |
1790 | } else if (vs->perm & P9_STAT_MODE_LINK) { | |
1791 | int32_t nfid = atoi(vs->extension.data); | |
1792 | V9fsFidState *nfidp = lookup_fid(s, nfid); | |
1793 | if (nfidp == NULL) { | |
1794 | err = -errno; | |
1795 | v9fs_post_create(s, vs, err); | |
1796 | } | |
1797 | err = v9fs_do_link(s, &nfidp->path, &vs->fullname); | |
1798 | v9fs_create_post_perms(s, vs, err); | |
1799 | } else if (vs->perm & P9_STAT_MODE_DEVICE) { | |
1800 | char ctype; | |
1801 | uint32_t major, minor; | |
1802 | mode_t nmode = 0; | |
1803 | ||
1804 | if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, | |
1805 | &minor) != 3) { | |
1806 | err = -errno; | |
1807 | v9fs_post_create(s, vs, err); | |
1808 | } | |
1809 | ||
1810 | switch (ctype) { | |
1811 | case 'c': | |
1812 | nmode = S_IFCHR; | |
1813 | break; | |
1814 | case 'b': | |
1815 | nmode = S_IFBLK; | |
1816 | break; | |
1817 | default: | |
1818 | err = -EIO; | |
1819 | v9fs_post_create(s, vs, err); | |
1820 | } | |
1821 | ||
1822 | nmode |= vs->perm & 0777; | |
1823 | err = v9fs_do_mknod(s, &vs->fullname, nmode, makedev(major, minor)); | |
1824 | v9fs_create_post_perms(s, vs, err); | |
1825 | } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { | |
1826 | err = v9fs_do_mknod(s, &vs->fullname, S_IFIFO | (vs->mode & 0777), 0); | |
1827 | v9fs_post_create(s, vs, err); | |
1828 | } else if (vs->perm & P9_STAT_MODE_SOCKET) { | |
1829 | err = v9fs_do_mksock(s, &vs->fullname); | |
1830 | v9fs_create_post_mksock(s, vs, err); | |
1831 | } else { | |
4750a96f | 1832 | vs->fidp->fd = v9fs_do_open2(s, vs); |
c494dd6f AL |
1833 | v9fs_create_post_open2(s, vs, err); |
1834 | } | |
1835 | ||
1836 | return; | |
1837 | ||
1838 | out: | |
1839 | v9fs_post_create(s, vs, err); | |
1840 | } | |
1841 | ||
9f107513 AL |
1842 | static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
1843 | { | |
c494dd6f AL |
1844 | int32_t fid; |
1845 | V9fsCreateState *vs; | |
1846 | int err = 0; | |
1847 | ||
1848 | vs = qemu_malloc(sizeof(*vs)); | |
1849 | vs->pdu = pdu; | |
1850 | vs->offset = 7; | |
1851 | ||
1852 | v9fs_string_init(&vs->fullname); | |
1853 | ||
1854 | pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name, | |
1855 | &vs->perm, &vs->mode, &vs->extension); | |
1856 | ||
1857 | vs->fidp = lookup_fid(s, fid); | |
1858 | if (vs->fidp == NULL) { | |
1859 | err = -EINVAL; | |
1860 | goto out; | |
9f107513 | 1861 | } |
c494dd6f AL |
1862 | |
1863 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
1864 | vs->name.data); | |
1865 | ||
1866 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1867 | v9fs_create_post_lstat(s, vs, err); | |
1868 | return; | |
1869 | ||
1870 | out: | |
1871 | complete_pdu(s, vs->pdu, err); | |
1872 | v9fs_string_free(&vs->name); | |
1873 | v9fs_string_free(&vs->extension); | |
1874 | qemu_free(vs); | |
9f107513 AL |
1875 | } |
1876 | ||
1877 | static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) | |
1878 | { | |
9c5e9d89 AL |
1879 | /* A nop call with no return */ |
1880 | complete_pdu(s, pdu, 7); | |
9f107513 AL |
1881 | } |
1882 | ||
5bae1900 AL |
1883 | static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
1884 | int err) | |
1885 | { | |
1886 | /* For TREMOVE we need to clunk the fid even on failed remove */ | |
1887 | err = free_fid(s, vs->fidp->fid); | |
1888 | if (err < 0) { | |
1889 | goto out; | |
1890 | } | |
1891 | ||
1892 | err = vs->offset; | |
1893 | out: | |
1894 | complete_pdu(s, vs->pdu, err); | |
1895 | qemu_free(vs); | |
1896 | } | |
1897 | ||
9f107513 AL |
1898 | static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
1899 | { | |
5bae1900 AL |
1900 | int32_t fid; |
1901 | V9fsRemoveState *vs; | |
1902 | int err = 0; | |
1903 | ||
1904 | vs = qemu_malloc(sizeof(*vs)); | |
1905 | vs->pdu = pdu; | |
1906 | vs->offset = 7; | |
1907 | ||
1908 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1909 | ||
1910 | vs->fidp = lookup_fid(s, fid); | |
1911 | if (vs->fidp == NULL) { | |
1912 | err = -EINVAL; | |
1913 | goto out; | |
9f107513 | 1914 | } |
5bae1900 AL |
1915 | |
1916 | err = v9fs_do_remove(s, &vs->fidp->path); | |
1917 | v9fs_remove_post_remove(s, vs, err); | |
1918 | return; | |
1919 | ||
1920 | out: | |
1921 | complete_pdu(s, pdu, err); | |
1922 | qemu_free(vs); | |
9f107513 AL |
1923 | } |
1924 | ||
8cf89e00 AL |
1925 | static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
1926 | { | |
1927 | if (err < 0) { | |
1928 | goto out; | |
1929 | } | |
1930 | ||
1931 | err = vs->offset; | |
1932 | ||
1933 | out: | |
1934 | v9fs_stat_free(&vs->v9stat); | |
1935 | complete_pdu(s, vs->pdu, err); | |
1936 | qemu_free(vs); | |
1937 | } | |
1938 | ||
1939 | static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) | |
1940 | { | |
1941 | if (err < 0) { | |
1942 | goto out; | |
1943 | } | |
1944 | ||
1945 | if (vs->v9stat.name.size != 0) { | |
1946 | v9fs_string_free(&vs->nname); | |
1947 | } | |
1948 | ||
1949 | if (vs->v9stat.length != -1) { | |
1950 | if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { | |
1951 | err = -errno; | |
1952 | } | |
1953 | } | |
1954 | v9fs_wstat_post_truncate(s, vs, err); | |
1955 | return; | |
1956 | ||
1957 | out: | |
1958 | v9fs_stat_free(&vs->v9stat); | |
1959 | complete_pdu(s, vs->pdu, err); | |
1960 | qemu_free(vs); | |
1961 | } | |
1962 | ||
1963 | static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) | |
1964 | { | |
1965 | V9fsFidState *fidp; | |
1966 | if (err < 0) { | |
1967 | goto out; | |
1968 | } | |
1969 | ||
1970 | if (vs->v9stat.name.size != 0) { | |
1971 | char *old_name, *new_name; | |
1972 | char *end; | |
1973 | ||
1974 | old_name = vs->fidp->path.data; | |
1975 | end = strrchr(old_name, '/'); | |
1976 | if (end) { | |
1977 | end++; | |
1978 | } else { | |
1979 | end = old_name; | |
1980 | } | |
1981 | ||
1982 | new_name = qemu_malloc(end - old_name + vs->v9stat.name.size + 1); | |
1983 | ||
1984 | memset(new_name, 0, end - old_name + vs->v9stat.name.size + 1); | |
1985 | memcpy(new_name, old_name, end - old_name); | |
1986 | memcpy(new_name + (end - old_name), vs->v9stat.name.data, | |
1987 | vs->v9stat.name.size); | |
1988 | vs->nname.data = new_name; | |
1989 | vs->nname.size = strlen(new_name); | |
1990 | ||
1991 | if (strcmp(new_name, vs->fidp->path.data) != 0) { | |
1992 | if (v9fs_do_rename(s, &vs->fidp->path, &vs->nname)) { | |
1993 | err = -errno; | |
1994 | } else { | |
1995 | /* | |
1996 | * Fixup fid's pointing to the old name to | |
1997 | * start pointing to the new name | |
1998 | */ | |
1999 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2000 | ||
2001 | if (vs->fidp == fidp) { | |
2002 | /* | |
2003 | * we replace name of this fid towards the end | |
2004 | * so that our below strcmp will work | |
2005 | */ | |
2006 | continue; | |
2007 | } | |
2008 | if (!strncmp(vs->fidp->path.data, fidp->path.data, | |
2009 | strlen(vs->fidp->path.data))) { | |
2010 | /* replace the name */ | |
2011 | v9fs_fix_path(&fidp->path, &vs->nname, | |
2012 | strlen(vs->fidp->path.data)); | |
2013 | } | |
2014 | } | |
2015 | v9fs_string_copy(&vs->fidp->path, &vs->nname); | |
2016 | } | |
2017 | } | |
2018 | } | |
2019 | v9fs_wstat_post_rename(s, vs, err); | |
2020 | return; | |
2021 | ||
2022 | out: | |
2023 | v9fs_stat_free(&vs->v9stat); | |
2024 | complete_pdu(s, vs->pdu, err); | |
2025 | qemu_free(vs); | |
2026 | } | |
2027 | ||
2028 | static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) | |
2029 | { | |
2030 | if (err < 0) { | |
2031 | goto out; | |
2032 | } | |
2033 | ||
f7613bee | 2034 | if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
8cf89e00 AL |
2035 | if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid, |
2036 | vs->v9stat.n_gid)) { | |
2037 | err = -errno; | |
2038 | } | |
2039 | } | |
2040 | v9fs_wstat_post_chown(s, vs, err); | |
2041 | return; | |
2042 | ||
2043 | out: | |
2044 | v9fs_stat_free(&vs->v9stat); | |
2045 | complete_pdu(s, vs->pdu, err); | |
2046 | qemu_free(vs); | |
2047 | } | |
2048 | ||
2049 | static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) | |
2050 | { | |
2051 | if (err < 0) { | |
2052 | goto out; | |
2053 | } | |
2054 | ||
2055 | if (vs->v9stat.mtime != -1) { | |
2056 | struct utimbuf tb; | |
2057 | tb.actime = 0; | |
2058 | tb.modtime = vs->v9stat.mtime; | |
2059 | if (v9fs_do_utime(s, &vs->fidp->path, &tb)) { | |
2060 | err = -errno; | |
2061 | } | |
2062 | } | |
2063 | ||
2064 | v9fs_wstat_post_utime(s, vs, err); | |
2065 | return; | |
2066 | ||
2067 | out: | |
2068 | v9fs_stat_free(&vs->v9stat); | |
2069 | complete_pdu(s, vs->pdu, err); | |
2070 | qemu_free(vs); | |
2071 | } | |
2072 | ||
2073 | static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) | |
2074 | { | |
2075 | if (err == -1) { | |
2076 | err = -errno; | |
2077 | } | |
2078 | v9fs_stat_free(&vs->v9stat); | |
2079 | complete_pdu(s, vs->pdu, err); | |
2080 | qemu_free(vs); | |
2081 | } | |
2082 | ||
2083 | static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) | |
2084 | { | |
2085 | uint32_t v9_mode; | |
2086 | ||
2087 | if (err == -1) { | |
2088 | err = -errno; | |
2089 | goto out; | |
2090 | } | |
2091 | ||
2092 | v9_mode = stat_to_v9mode(&vs->stbuf); | |
2093 | ||
2094 | if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2095 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2096 | /* Attempting to change the type */ | |
2097 | err = -EIO; | |
2098 | goto out; | |
2099 | } | |
2100 | ||
2101 | if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode, | |
2102 | &vs->v9stat.extension))) { | |
2103 | err = -errno; | |
2104 | } | |
2105 | v9fs_wstat_post_chmod(s, vs, err); | |
2106 | return; | |
2107 | ||
2108 | out: | |
2109 | v9fs_stat_free(&vs->v9stat); | |
2110 | complete_pdu(s, vs->pdu, err); | |
2111 | qemu_free(vs); | |
2112 | } | |
2113 | ||
9f107513 AL |
2114 | static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2115 | { | |
8cf89e00 AL |
2116 | int32_t fid; |
2117 | V9fsWstatState *vs; | |
2118 | int err = 0; | |
2119 | ||
2120 | vs = qemu_malloc(sizeof(*vs)); | |
2121 | vs->pdu = pdu; | |
2122 | vs->offset = 7; | |
2123 | ||
2124 | pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat); | |
2125 | ||
2126 | vs->fidp = lookup_fid(s, fid); | |
2127 | if (vs->fidp == NULL) { | |
2128 | err = -EINVAL; | |
2129 | goto out; | |
9f107513 | 2130 | } |
8cf89e00 AL |
2131 | |
2132 | /* do we need to sync the file? */ | |
2133 | if (donttouch_stat(&vs->v9stat)) { | |
2134 | err = v9fs_do_fsync(s, vs->fidp->fd); | |
2135 | v9fs_wstat_post_fsync(s, vs, err); | |
2136 | return; | |
2137 | } | |
2138 | ||
2139 | if (vs->v9stat.mode != -1) { | |
2140 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
2141 | v9fs_wstat_post_lstat(s, vs, err); | |
2142 | return; | |
2143 | } | |
2144 | ||
2145 | v9fs_wstat_post_chmod(s, vs, err); | |
2146 | return; | |
2147 | ||
2148 | out: | |
2149 | v9fs_stat_free(&vs->v9stat); | |
2150 | complete_pdu(s, vs->pdu, err); | |
2151 | qemu_free(vs); | |
9f107513 AL |
2152 | } |
2153 | ||
2154 | typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); | |
2155 | ||
2156 | static pdu_handler_t *pdu_handlers[] = { | |
2157 | [P9_TVERSION] = v9fs_version, | |
2158 | [P9_TATTACH] = v9fs_attach, | |
2159 | [P9_TSTAT] = v9fs_stat, | |
2160 | [P9_TWALK] = v9fs_walk, | |
2161 | [P9_TCLUNK] = v9fs_clunk, | |
2162 | [P9_TOPEN] = v9fs_open, | |
2163 | [P9_TREAD] = v9fs_read, | |
2164 | #if 0 | |
2165 | [P9_TAUTH] = v9fs_auth, | |
2166 | #endif | |
2167 | [P9_TFLUSH] = v9fs_flush, | |
2168 | [P9_TCREATE] = v9fs_create, | |
2169 | [P9_TWRITE] = v9fs_write, | |
2170 | [P9_TWSTAT] = v9fs_wstat, | |
2171 | [P9_TREMOVE] = v9fs_remove, | |
2172 | }; | |
2173 | ||
2174 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) | |
2175 | { | |
2176 | pdu_handler_t *handler; | |
2177 | ||
2178 | if (debug_9p_pdu) { | |
2179 | pprint_pdu(pdu); | |
2180 | } | |
2181 | ||
2182 | BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); | |
2183 | ||
2184 | handler = pdu_handlers[pdu->id]; | |
2185 | BUG_ON(handler == NULL); | |
2186 | ||
2187 | handler(s, pdu); | |
2188 | } | |
2189 | ||
2190 | static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) | |
2191 | { | |
2192 | V9fsState *s = (V9fsState *)vdev; | |
2193 | V9fsPDU *pdu; | |
2194 | ssize_t len; | |
2195 | ||
2196 | while ((pdu = alloc_pdu(s)) && | |
2197 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
2198 | uint8_t *ptr; | |
2199 | ||
2200 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); | |
2201 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
2202 | ||
2203 | ptr = pdu->elem.out_sg[0].iov_base; | |
2204 | ||
2205 | memcpy(&pdu->size, ptr, 4); | |
2206 | pdu->id = ptr[4]; | |
2207 | memcpy(&pdu->tag, ptr + 5, 2); | |
2208 | ||
2209 | submit_pdu(s, pdu); | |
2210 | } | |
2211 | ||
2212 | free_pdu(s, pdu); | |
2213 | } | |
2214 | ||
2215 | static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features) | |
2216 | { | |
2217 | features |= 1 << VIRTIO_9P_MOUNT_TAG; | |
2218 | return features; | |
2219 | } | |
2220 | ||
2221 | static V9fsState *to_virtio_9p(VirtIODevice *vdev) | |
2222 | { | |
2223 | return (V9fsState *)vdev; | |
2224 | } | |
2225 | ||
2226 | static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) | |
2227 | { | |
2228 | struct virtio_9p_config *cfg; | |
2229 | V9fsState *s = to_virtio_9p(vdev); | |
2230 | ||
2231 | cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + | |
2232 | s->tag_len); | |
2233 | stw_raw(&cfg->tag_len, s->tag_len); | |
2234 | memcpy(cfg->tag, s->tag, s->tag_len); | |
2235 | memcpy(config, cfg, s->config_size); | |
2236 | qemu_free(cfg); | |
2237 | } | |
2238 | ||
2239 | VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) | |
2240 | { | |
2241 | V9fsState *s; | |
2242 | int i, len; | |
2243 | struct stat stat; | |
2244 | FsTypeEntry *fse; | |
2245 | ||
2246 | ||
2247 | s = (V9fsState *)virtio_common_init("virtio-9p", | |
2248 | VIRTIO_ID_9P, | |
2249 | sizeof(struct virtio_9p_config)+ | |
2250 | MAX_TAG_LEN, | |
2251 | sizeof(V9fsState)); | |
2252 | ||
2253 | /* initialize pdu allocator */ | |
2254 | QLIST_INIT(&s->free_list); | |
2255 | for (i = 0; i < (MAX_REQ - 1); i++) { | |
2256 | QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); | |
2257 | } | |
2258 | ||
2259 | s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); | |
2260 | ||
2261 | fse = get_fsdev_fsentry(conf->fsdev_id); | |
2262 | ||
2263 | if (!fse) { | |
2264 | /* We don't have a fsdev identified by fsdev_id */ | |
2265 | fprintf(stderr, "Virtio-9p device couldn't find fsdev " | |
2266 | "with the id %s\n", conf->fsdev_id); | |
2267 | exit(1); | |
2268 | } | |
2269 | ||
2270 | if (!fse->path || !conf->tag) { | |
2271 | /* we haven't specified a mount_tag or the path */ | |
2272 | fprintf(stderr, "fsdev with id %s needs path " | |
2273 | "and Virtio-9p device needs mount_tag arguments\n", | |
2274 | conf->fsdev_id); | |
2275 | exit(1); | |
2276 | } | |
2277 | ||
758e8e38 VJ |
2278 | if (!strcmp(fse->security_model, "passthrough")) { |
2279 | /* Files on the Fileserver set to client user credentials */ | |
2280 | s->ctx.fs_sm = SM_PASSTHROUGH; | |
2281 | } else if (!strcmp(fse->security_model, "mapped")) { | |
2282 | /* Files on the fileserver are set to QEMU credentials. | |
2283 | * Client user credentials are saved in extended attributes. | |
2284 | */ | |
2285 | s->ctx.fs_sm = SM_MAPPED; | |
2286 | } else { | |
9ce56db6 VJ |
2287 | /* user haven't specified a correct security option */ |
2288 | fprintf(stderr, "one of the following must be specified as the" | |
2289 | "security option:\n\t security_model=passthrough \n\t " | |
2290 | "security_model=mapped\n"); | |
2291 | return NULL; | |
2292 | } | |
2293 | ||
9f107513 AL |
2294 | if (lstat(fse->path, &stat)) { |
2295 | fprintf(stderr, "share path %s does not exist\n", fse->path); | |
2296 | exit(1); | |
2297 | } else if (!S_ISDIR(stat.st_mode)) { | |
2298 | fprintf(stderr, "share path %s is not a directory \n", fse->path); | |
2299 | exit(1); | |
2300 | } | |
2301 | ||
2302 | s->ctx.fs_root = qemu_strdup(fse->path); | |
2303 | len = strlen(conf->tag); | |
2304 | if (len > MAX_TAG_LEN) { | |
2305 | len = MAX_TAG_LEN; | |
2306 | } | |
2307 | /* s->tag is non-NULL terminated string */ | |
2308 | s->tag = qemu_malloc(len); | |
2309 | memcpy(s->tag, conf->tag, len); | |
2310 | s->tag_len = len; | |
2311 | s->ctx.uid = -1; | |
2312 | ||
2313 | s->ops = fse->ops; | |
2314 | s->vdev.get_features = virtio_9p_get_features; | |
2315 | s->config_size = sizeof(struct virtio_9p_config) + | |
2316 | s->tag_len; | |
2317 | s->vdev.get_config = virtio_9p_get_config; | |
2318 | ||
2319 | return &s->vdev; | |
2320 | } |