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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 | ||
131dcb25 AL |
24 | static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
25 | { | |
26 | return s->ops->lstat(&s->ctx, path->data, stbuf); | |
27 | } | |
28 | ||
29 | static int v9fs_do_setuid(V9fsState *s, uid_t uid) | |
30 | { | |
31 | return s->ops->setuid(&s->ctx, uid); | |
32 | } | |
33 | ||
34 | static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf) | |
35 | { | |
36 | ssize_t len; | |
37 | ||
38 | buf->data = qemu_malloc(1024); | |
39 | ||
40 | len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1); | |
41 | if (len > -1) { | |
42 | buf->size = len; | |
43 | buf->data[len] = 0; | |
44 | } | |
45 | ||
46 | return len; | |
47 | } | |
48 | ||
49 | static int v9fs_do_close(V9fsState *s, int fd) | |
50 | { | |
51 | return s->ops->close(&s->ctx, fd); | |
52 | } | |
53 | ||
54 | static int v9fs_do_closedir(V9fsState *s, DIR *dir) | |
55 | { | |
56 | return s->ops->closedir(&s->ctx, dir); | |
57 | } | |
58 | ||
a6568fe2 AL |
59 | static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
60 | { | |
61 | return s->ops->open(&s->ctx, path->data, flags); | |
62 | } | |
63 | ||
64 | static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path) | |
65 | { | |
66 | return s->ops->opendir(&s->ctx, path->data); | |
67 | } | |
68 | ||
a9231555 AL |
69 | static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
70 | { | |
71 | return s->ops->rewinddir(&s->ctx, dir); | |
72 | } | |
73 | ||
74 | static off_t v9fs_do_telldir(V9fsState *s, DIR *dir) | |
75 | { | |
76 | return s->ops->telldir(&s->ctx, dir); | |
77 | } | |
78 | ||
79 | static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir) | |
80 | { | |
81 | return s->ops->readdir(&s->ctx, dir); | |
82 | } | |
83 | ||
84 | static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) | |
85 | { | |
86 | return s->ops->seekdir(&s->ctx, dir, off); | |
87 | } | |
88 | ||
89 | static int v9fs_do_readv(V9fsState *s, int fd, const struct iovec *iov, | |
90 | int iovcnt) | |
91 | { | |
92 | return s->ops->readv(&s->ctx, fd, iov, iovcnt); | |
93 | } | |
94 | ||
95 | static off_t v9fs_do_lseek(V9fsState *s, int fd, off_t offset, int whence) | |
96 | { | |
97 | return s->ops->lseek(&s->ctx, fd, offset, whence); | |
98 | } | |
99 | ||
8449360c AL |
100 | static int v9fs_do_writev(V9fsState *s, int fd, const struct iovec *iov, |
101 | int iovcnt) | |
102 | { | |
103 | return s->ops->writev(&s->ctx, fd, iov, iovcnt); | |
104 | } | |
105 | ||
c494dd6f AL |
106 | static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
107 | { | |
108 | return s->ops->chmod(&s->ctx, path->data, mode); | |
109 | } | |
110 | ||
111 | static int v9fs_do_mknod(V9fsState *s, V9fsString *path, mode_t mode, dev_t dev) | |
112 | { | |
113 | return s->ops->mknod(&s->ctx, path->data, mode, dev); | |
114 | } | |
115 | ||
116 | static int v9fs_do_mksock(V9fsState *s, V9fsString *path) | |
117 | { | |
118 | return s->ops->mksock(&s->ctx, path->data); | |
119 | } | |
120 | ||
121 | static int v9fs_do_mkdir(V9fsState *s, V9fsString *path, mode_t mode) | |
122 | { | |
123 | return s->ops->mkdir(&s->ctx, path->data, mode); | |
124 | } | |
125 | ||
126 | static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) | |
127 | { | |
128 | return s->ops->fstat(&s->ctx, fd, stbuf); | |
129 | } | |
130 | ||
131 | static int v9fs_do_open2(V9fsState *s, V9fsString *path, int flags, mode_t mode) | |
132 | { | |
133 | return s->ops->open2(&s->ctx, path->data, flags, mode); | |
134 | } | |
135 | ||
136 | static int v9fs_do_symlink(V9fsState *s, V9fsString *oldpath, | |
137 | V9fsString *newpath) | |
138 | { | |
139 | return s->ops->symlink(&s->ctx, oldpath->data, newpath->data); | |
140 | } | |
141 | ||
142 | static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) | |
143 | { | |
144 | return s->ops->link(&s->ctx, oldpath->data, newpath->data); | |
145 | } | |
146 | ||
8cf89e00 AL |
147 | static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
148 | { | |
149 | return s->ops->truncate(&s->ctx, path->data, size); | |
150 | } | |
151 | ||
152 | static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, | |
153 | V9fsString *newpath) | |
154 | { | |
155 | return s->ops->rename(&s->ctx, oldpath->data, newpath->data); | |
156 | } | |
157 | ||
158 | static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) | |
159 | { | |
160 | return s->ops->chown(&s->ctx, path->data, uid, gid); | |
161 | } | |
162 | ||
163 | static int v9fs_do_utime(V9fsState *s, V9fsString *path, | |
164 | const struct utimbuf *buf) | |
165 | { | |
166 | return s->ops->utime(&s->ctx, path->data, buf); | |
167 | } | |
168 | ||
5bae1900 AL |
169 | static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
170 | { | |
171 | return s->ops->remove(&s->ctx, path->data); | |
172 | } | |
173 | ||
8cf89e00 AL |
174 | static int v9fs_do_fsync(V9fsState *s, int fd) |
175 | { | |
176 | return s->ops->fsync(&s->ctx, fd); | |
177 | } | |
178 | ||
a03f7874 AL |
179 | static void v9fs_string_init(V9fsString *str) |
180 | { | |
181 | str->data = NULL; | |
182 | str->size = 0; | |
183 | } | |
184 | ||
185 | static void v9fs_string_free(V9fsString *str) | |
186 | { | |
187 | qemu_free(str->data); | |
188 | str->data = NULL; | |
189 | str->size = 0; | |
190 | } | |
191 | ||
192 | static void v9fs_string_null(V9fsString *str) | |
193 | { | |
194 | v9fs_string_free(str); | |
195 | } | |
196 | ||
197 | static int number_to_string(void *arg, char type) | |
198 | { | |
199 | unsigned int ret = 0; | |
200 | ||
201 | switch (type) { | |
202 | case 'u': { | |
203 | unsigned int num = *(unsigned int *)arg; | |
204 | ||
205 | do { | |
206 | ret++; | |
207 | num = num/10; | |
208 | } while (num); | |
209 | break; | |
210 | } | |
211 | default: | |
212 | printf("Number_to_string: Unknown number format\n"); | |
213 | return -1; | |
214 | } | |
215 | ||
216 | return ret; | |
217 | } | |
218 | ||
219 | static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
220 | { | |
221 | va_list ap2; | |
222 | char *iter = (char *)fmt; | |
223 | int len = 0; | |
224 | int nr_args = 0; | |
225 | char *arg_char_ptr; | |
226 | unsigned int arg_uint; | |
227 | ||
228 | /* Find the number of %'s that denotes an argument */ | |
229 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
230 | nr_args++; | |
231 | iter++; | |
232 | } | |
233 | ||
234 | len = strlen(fmt) - 2*nr_args; | |
235 | ||
236 | if (!nr_args) { | |
237 | goto alloc_print; | |
238 | } | |
239 | ||
240 | va_copy(ap2, ap); | |
241 | ||
242 | iter = (char *)fmt; | |
243 | ||
244 | /* Now parse the format string */ | |
245 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
246 | iter++; | |
247 | switch (*iter) { | |
248 | case 'u': | |
249 | arg_uint = va_arg(ap2, unsigned int); | |
250 | len += number_to_string((void *)&arg_uint, 'u'); | |
251 | break; | |
252 | case 's': | |
253 | arg_char_ptr = va_arg(ap2, char *); | |
254 | len += strlen(arg_char_ptr); | |
255 | break; | |
256 | case 'c': | |
257 | len += 1; | |
258 | break; | |
259 | default: | |
260 | fprintf(stderr, | |
261 | "v9fs_string_alloc_printf:Incorrect format %c", *iter); | |
262 | return -1; | |
263 | } | |
264 | iter++; | |
265 | } | |
266 | ||
267 | alloc_print: | |
268 | *strp = qemu_malloc((len + 1) * sizeof(**strp)); | |
269 | ||
270 | return vsprintf(*strp, fmt, ap); | |
271 | } | |
272 | ||
273 | static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
274 | { | |
275 | va_list ap; | |
276 | int err; | |
277 | ||
278 | v9fs_string_free(str); | |
279 | ||
280 | va_start(ap, fmt); | |
281 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
282 | BUG_ON(err == -1); | |
283 | va_end(ap); | |
284 | ||
285 | str->size = err; | |
286 | } | |
287 | ||
288 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
289 | { | |
290 | v9fs_string_free(lhs); | |
291 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
292 | } | |
293 | ||
294 | static size_t v9fs_string_size(V9fsString *str) | |
295 | { | |
296 | return str->size; | |
297 | } | |
298 | ||
286d5652 AL |
299 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
300 | { | |
301 | V9fsFidState *f; | |
302 | ||
303 | for (f = s->fid_list; f; f = f->next) { | |
304 | if (f->fid == fid) { | |
305 | v9fs_do_setuid(s, f->uid); | |
306 | return f; | |
307 | } | |
308 | } | |
309 | ||
310 | return NULL; | |
311 | } | |
312 | ||
313 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
314 | { | |
315 | V9fsFidState *f; | |
316 | ||
317 | f = lookup_fid(s, fid); | |
318 | if (f) { | |
319 | return NULL; | |
320 | } | |
321 | ||
322 | f = qemu_mallocz(sizeof(V9fsFidState)); | |
323 | ||
324 | f->fid = fid; | |
325 | f->fd = -1; | |
326 | f->dir = NULL; | |
327 | ||
328 | f->next = s->fid_list; | |
329 | s->fid_list = f; | |
330 | ||
331 | return f; | |
332 | } | |
333 | ||
334 | static int free_fid(V9fsState *s, int32_t fid) | |
335 | { | |
336 | V9fsFidState **fidpp, *fidp; | |
337 | ||
338 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
339 | if ((*fidpp)->fid == fid) { | |
340 | break; | |
341 | } | |
342 | } | |
343 | ||
344 | if (*fidpp == NULL) { | |
345 | return -ENOENT; | |
346 | } | |
347 | ||
348 | fidp = *fidpp; | |
349 | *fidpp = fidp->next; | |
350 | ||
351 | if (fidp->fd != -1) { | |
352 | v9fs_do_close(s, fidp->fd); | |
353 | } | |
354 | if (fidp->dir) { | |
355 | v9fs_do_closedir(s, fidp->dir); | |
356 | } | |
357 | v9fs_string_free(&fidp->path); | |
358 | qemu_free(fidp); | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
363 | #define P9_QID_TYPE_DIR 0x80 | |
364 | #define P9_QID_TYPE_SYMLINK 0x02 | |
365 | ||
366 | #define P9_STAT_MODE_DIR 0x80000000 | |
367 | #define P9_STAT_MODE_APPEND 0x40000000 | |
368 | #define P9_STAT_MODE_EXCL 0x20000000 | |
369 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
370 | #define P9_STAT_MODE_AUTH 0x08000000 | |
371 | #define P9_STAT_MODE_TMP 0x04000000 | |
372 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
373 | #define P9_STAT_MODE_LINK 0x01000000 | |
374 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
375 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
376 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
377 | #define P9_STAT_MODE_SETUID 0x00080000 | |
378 | #define P9_STAT_MODE_SETGID 0x00040000 | |
379 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
380 | ||
381 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
382 | P9_STAT_MODE_SYMLINK | \ | |
383 | P9_STAT_MODE_LINK | \ | |
384 | P9_STAT_MODE_DEVICE | \ | |
385 | P9_STAT_MODE_NAMED_PIPE | \ | |
386 | P9_STAT_MODE_SOCKET) | |
387 | ||
388 | /* This is the algorithm from ufs in spfs */ | |
389 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
390 | { | |
391 | size_t size; | |
392 | ||
393 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
394 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
395 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
396 | qidp->type = 0; | |
397 | if (S_ISDIR(stbuf->st_mode)) { | |
398 | qidp->type |= P9_QID_TYPE_DIR; | |
399 | } | |
400 | if (S_ISLNK(stbuf->st_mode)) { | |
401 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
402 | } | |
403 | } | |
404 | ||
405 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
406 | { | |
407 | struct stat stbuf; | |
408 | int err; | |
409 | ||
410 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
411 | if (err) { | |
412 | return err; | |
413 | } | |
414 | ||
415 | stat_to_qid(&stbuf, qidp); | |
416 | return 0; | |
417 | } | |
418 | ||
9f107513 AL |
419 | static V9fsPDU *alloc_pdu(V9fsState *s) |
420 | { | |
421 | V9fsPDU *pdu = NULL; | |
422 | ||
423 | if (!QLIST_EMPTY(&s->free_list)) { | |
424 | pdu = QLIST_FIRST(&s->free_list); | |
425 | QLIST_REMOVE(pdu, next); | |
426 | } | |
427 | return pdu; | |
428 | } | |
429 | ||
430 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
431 | { | |
432 | if (pdu) { | |
433 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
434 | } | |
435 | } | |
436 | ||
437 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
438 | size_t offset, size_t size, int pack) | |
439 | { | |
440 | int i = 0; | |
441 | size_t copied = 0; | |
442 | ||
443 | for (i = 0; size && i < sg_count; i++) { | |
444 | size_t len; | |
445 | if (offset >= sg[i].iov_len) { | |
446 | /* skip this sg */ | |
447 | offset -= sg[i].iov_len; | |
448 | continue; | |
449 | } else { | |
450 | len = MIN(sg[i].iov_len - offset, size); | |
451 | if (pack) { | |
452 | memcpy(sg[i].iov_base + offset, addr, len); | |
453 | } else { | |
454 | memcpy(addr, sg[i].iov_base + offset, len); | |
455 | } | |
456 | size -= len; | |
457 | copied += len; | |
458 | addr += len; | |
459 | if (size) { | |
460 | offset = 0; | |
461 | continue; | |
462 | } | |
463 | } | |
464 | } | |
465 | ||
466 | return copied; | |
467 | } | |
468 | ||
405a549a AL |
469 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
470 | { | |
471 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
472 | offset, size, 0); | |
473 | } | |
474 | ||
475 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
476 | size_t size) | |
477 | { | |
478 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
479 | offset, size, 1); | |
480 | } | |
481 | ||
482 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
483 | { | |
484 | size_t pos = 0; | |
485 | int i, j; | |
486 | struct iovec *src_sg; | |
487 | unsigned int num; | |
488 | ||
489 | if (rx) { | |
490 | src_sg = pdu->elem.in_sg; | |
491 | num = pdu->elem.in_num; | |
492 | } else { | |
493 | src_sg = pdu->elem.out_sg; | |
494 | num = pdu->elem.out_num; | |
495 | } | |
496 | ||
497 | j = 0; | |
498 | for (i = 0; i < num; i++) { | |
499 | if (offset <= pos) { | |
500 | sg[j].iov_base = src_sg[i].iov_base; | |
501 | sg[j].iov_len = src_sg[i].iov_len; | |
502 | j++; | |
503 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
504 | sg[j].iov_base = src_sg[i].iov_base; | |
505 | sg[j].iov_len = src_sg[i].iov_len; | |
506 | sg[j].iov_base += (offset - pos); | |
507 | sg[j].iov_len -= (offset - pos); | |
508 | j++; | |
509 | } | |
510 | pos += src_sg[i].iov_len; | |
511 | } | |
512 | ||
513 | return j; | |
514 | } | |
515 | ||
516 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
517 | { | |
518 | size_t old_offset = offset; | |
519 | va_list ap; | |
520 | int i; | |
521 | ||
522 | va_start(ap, fmt); | |
523 | for (i = 0; fmt[i]; i++) { | |
524 | switch (fmt[i]) { | |
525 | case 'b': { | |
526 | uint8_t *valp = va_arg(ap, uint8_t *); | |
527 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
528 | break; | |
529 | } | |
530 | case 'w': { | |
531 | uint16_t val, *valp; | |
532 | valp = va_arg(ap, uint16_t *); | |
533 | val = le16_to_cpupu(valp); | |
534 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
535 | *valp = val; | |
536 | break; | |
537 | } | |
538 | case 'd': { | |
539 | uint32_t val, *valp; | |
540 | valp = va_arg(ap, uint32_t *); | |
541 | val = le32_to_cpupu(valp); | |
542 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
543 | *valp = val; | |
544 | break; | |
545 | } | |
546 | case 'q': { | |
547 | uint64_t val, *valp; | |
548 | valp = va_arg(ap, uint64_t *); | |
549 | val = le64_to_cpup(valp); | |
550 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
551 | *valp = val; | |
552 | break; | |
553 | } | |
554 | case 'v': { | |
555 | struct iovec *iov = va_arg(ap, struct iovec *); | |
556 | int *iovcnt = va_arg(ap, int *); | |
557 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
558 | break; | |
559 | } | |
560 | case 's': { | |
561 | V9fsString *str = va_arg(ap, V9fsString *); | |
562 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
563 | /* FIXME: sanity check str->size */ | |
564 | str->data = qemu_malloc(str->size + 1); | |
565 | offset += pdu_unpack(str->data, pdu, offset, str->size); | |
566 | str->data[str->size] = 0; | |
567 | break; | |
568 | } | |
569 | case 'Q': { | |
570 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
571 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
572 | &qidp->type, &qidp->version, &qidp->path); | |
573 | break; | |
574 | } | |
575 | case 'S': { | |
576 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
577 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
578 | &statp->size, &statp->type, &statp->dev, | |
579 | &statp->qid, &statp->mode, &statp->atime, | |
580 | &statp->mtime, &statp->length, | |
581 | &statp->name, &statp->uid, &statp->gid, | |
582 | &statp->muid, &statp->extension, | |
583 | &statp->n_uid, &statp->n_gid, | |
584 | &statp->n_muid); | |
585 | break; | |
586 | } | |
587 | default: | |
588 | break; | |
589 | } | |
590 | } | |
591 | ||
592 | va_end(ap); | |
593 | ||
594 | return offset - old_offset; | |
595 | } | |
596 | ||
597 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
598 | { | |
599 | size_t old_offset = offset; | |
600 | va_list ap; | |
601 | int i; | |
602 | ||
603 | va_start(ap, fmt); | |
604 | for (i = 0; fmt[i]; i++) { | |
605 | switch (fmt[i]) { | |
606 | case 'b': { | |
607 | uint8_t val = va_arg(ap, int); | |
608 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
609 | break; | |
610 | } | |
611 | case 'w': { | |
612 | uint16_t val; | |
613 | cpu_to_le16w(&val, va_arg(ap, int)); | |
614 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
615 | break; | |
616 | } | |
617 | case 'd': { | |
618 | uint32_t val; | |
619 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
620 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
621 | break; | |
622 | } | |
623 | case 'q': { | |
624 | uint64_t val; | |
625 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
626 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
627 | break; | |
628 | } | |
629 | case 'v': { | |
630 | struct iovec *iov = va_arg(ap, struct iovec *); | |
631 | int *iovcnt = va_arg(ap, int *); | |
632 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
633 | break; | |
634 | } | |
635 | case 's': { | |
636 | V9fsString *str = va_arg(ap, V9fsString *); | |
637 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
638 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
639 | break; | |
640 | } | |
641 | case 'Q': { | |
642 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
643 | offset += pdu_marshal(pdu, offset, "bdq", | |
644 | qidp->type, qidp->version, qidp->path); | |
645 | break; | |
646 | } | |
647 | case 'S': { | |
648 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
649 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
650 | statp->size, statp->type, statp->dev, | |
651 | &statp->qid, statp->mode, statp->atime, | |
652 | statp->mtime, statp->length, &statp->name, | |
653 | &statp->uid, &statp->gid, &statp->muid, | |
654 | &statp->extension, statp->n_uid, | |
655 | statp->n_gid, statp->n_muid); | |
656 | break; | |
657 | } | |
658 | default: | |
659 | break; | |
660 | } | |
661 | } | |
662 | va_end(ap); | |
663 | ||
664 | return offset - old_offset; | |
665 | } | |
666 | ||
667 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
668 | { | |
669 | int8_t id = pdu->id + 1; /* Response */ | |
670 | ||
671 | if (len < 0) { | |
672 | V9fsString str; | |
673 | int err = -len; | |
674 | ||
675 | str.data = strerror(err); | |
676 | str.size = strlen(str.data); | |
677 | ||
678 | len = 7; | |
679 | len += pdu_marshal(pdu, len, "s", &str); | |
680 | if (dotu) { | |
681 | len += pdu_marshal(pdu, len, "d", err); | |
682 | } | |
683 | ||
684 | id = P9_RERROR; | |
685 | } | |
686 | ||
687 | /* fill out the header */ | |
688 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
689 | ||
690 | /* keep these in sync */ | |
691 | pdu->size = len; | |
692 | pdu->id = id; | |
693 | ||
694 | /* push onto queue and notify */ | |
695 | virtqueue_push(s->vq, &pdu->elem, len); | |
696 | ||
697 | /* FIXME: we should batch these completions */ | |
698 | virtio_notify(&s->vdev, s->vq); | |
699 | ||
700 | free_pdu(s, pdu); | |
701 | } | |
702 | ||
bb9e3216 AL |
703 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
704 | { | |
705 | mode_t ret; | |
706 | ||
707 | ret = mode & 0777; | |
708 | if (mode & P9_STAT_MODE_DIR) { | |
709 | ret |= S_IFDIR; | |
710 | } | |
711 | ||
712 | if (dotu) { | |
713 | if (mode & P9_STAT_MODE_SYMLINK) { | |
714 | ret |= S_IFLNK; | |
715 | } | |
716 | if (mode & P9_STAT_MODE_SOCKET) { | |
717 | ret |= S_IFSOCK; | |
718 | } | |
719 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
720 | ret |= S_IFIFO; | |
721 | } | |
722 | if (mode & P9_STAT_MODE_DEVICE) { | |
723 | if (extension && extension->data[0] == 'c') { | |
724 | ret |= S_IFCHR; | |
725 | } else { | |
726 | ret |= S_IFBLK; | |
727 | } | |
728 | } | |
729 | } | |
730 | ||
731 | if (!(ret&~0777)) { | |
732 | ret |= S_IFREG; | |
733 | } | |
734 | ||
735 | if (mode & P9_STAT_MODE_SETUID) { | |
736 | ret |= S_ISUID; | |
737 | } | |
738 | if (mode & P9_STAT_MODE_SETGID) { | |
739 | ret |= S_ISGID; | |
740 | } | |
741 | if (mode & P9_STAT_MODE_SETVTX) { | |
742 | ret |= S_ISVTX; | |
743 | } | |
744 | ||
745 | return ret; | |
746 | } | |
747 | ||
748 | static int donttouch_stat(V9fsStat *stat) | |
749 | { | |
750 | if (stat->type == -1 && | |
751 | stat->dev == -1 && | |
752 | stat->qid.type == -1 && | |
753 | stat->qid.version == -1 && | |
754 | stat->qid.path == -1 && | |
755 | stat->mode == -1 && | |
756 | stat->atime == -1 && | |
757 | stat->mtime == -1 && | |
758 | stat->length == -1 && | |
759 | !stat->name.size && | |
760 | !stat->uid.size && | |
761 | !stat->gid.size && | |
762 | !stat->muid.size && | |
763 | stat->n_uid == -1 && | |
764 | stat->n_gid == -1 && | |
765 | stat->n_muid == -1) { | |
766 | return 1; | |
767 | } | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | static void v9fs_stat_free(V9fsStat *stat) | |
773 | { | |
774 | v9fs_string_free(&stat->name); | |
775 | v9fs_string_free(&stat->uid); | |
776 | v9fs_string_free(&stat->gid); | |
777 | v9fs_string_free(&stat->muid); | |
778 | v9fs_string_free(&stat->extension); | |
779 | } | |
780 | ||
781 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
782 | { | |
783 | uint32_t mode; | |
784 | ||
785 | mode = stbuf->st_mode & 0777; | |
786 | if (S_ISDIR(stbuf->st_mode)) { | |
787 | mode |= P9_STAT_MODE_DIR; | |
788 | } | |
789 | ||
790 | if (dotu) { | |
791 | if (S_ISLNK(stbuf->st_mode)) { | |
792 | mode |= P9_STAT_MODE_SYMLINK; | |
793 | } | |
794 | ||
795 | if (S_ISSOCK(stbuf->st_mode)) { | |
796 | mode |= P9_STAT_MODE_SOCKET; | |
797 | } | |
798 | ||
799 | if (S_ISFIFO(stbuf->st_mode)) { | |
800 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
801 | } | |
802 | ||
803 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { | |
804 | mode |= P9_STAT_MODE_DEVICE; | |
805 | } | |
806 | ||
807 | if (stbuf->st_mode & S_ISUID) { | |
808 | mode |= P9_STAT_MODE_SETUID; | |
809 | } | |
810 | ||
811 | if (stbuf->st_mode & S_ISGID) { | |
812 | mode |= P9_STAT_MODE_SETGID; | |
813 | } | |
814 | ||
815 | if (stbuf->st_mode & S_ISVTX) { | |
816 | mode |= P9_STAT_MODE_SETVTX; | |
817 | } | |
818 | } | |
819 | ||
820 | return mode; | |
821 | } | |
822 | ||
823 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
824 | const struct stat *stbuf, | |
825 | V9fsStat *v9stat) | |
826 | { | |
827 | int err; | |
828 | const char *str; | |
829 | ||
830 | memset(v9stat, 0, sizeof(*v9stat)); | |
831 | ||
832 | stat_to_qid(stbuf, &v9stat->qid); | |
833 | v9stat->mode = stat_to_v9mode(stbuf); | |
834 | v9stat->atime = stbuf->st_atime; | |
835 | v9stat->mtime = stbuf->st_mtime; | |
836 | v9stat->length = stbuf->st_size; | |
837 | ||
838 | v9fs_string_null(&v9stat->uid); | |
839 | v9fs_string_null(&v9stat->gid); | |
840 | v9fs_string_null(&v9stat->muid); | |
841 | ||
842 | if (dotu) { | |
843 | v9stat->n_uid = stbuf->st_uid; | |
844 | v9stat->n_gid = stbuf->st_gid; | |
845 | v9stat->n_muid = 0; | |
846 | ||
847 | v9fs_string_null(&v9stat->extension); | |
848 | ||
849 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { | |
850 | err = v9fs_do_readlink(s, name, &v9stat->extension); | |
851 | if (err == -1) { | |
852 | err = -errno; | |
853 | return err; | |
854 | } | |
855 | v9stat->extension.data[err] = 0; | |
856 | v9stat->extension.size = err; | |
857 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { | |
858 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
859 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
860 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
861 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
862 | v9fs_string_sprintf(&v9stat->extension, "%s %u", | |
863 | "HARDLINKCOUNT", stbuf->st_nlink); | |
864 | } | |
865 | } | |
866 | ||
867 | str = strrchr(name->data, '/'); | |
868 | if (str) { | |
869 | str += 1; | |
870 | } else { | |
871 | str = name->data; | |
872 | } | |
873 | ||
874 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
875 | ||
876 | v9stat->size = 61 + | |
877 | v9fs_string_size(&v9stat->name) + | |
878 | v9fs_string_size(&v9stat->uid) + | |
879 | v9fs_string_size(&v9stat->gid) + | |
880 | v9fs_string_size(&v9stat->muid) + | |
881 | v9fs_string_size(&v9stat->extension); | |
882 | return 0; | |
883 | } | |
884 | ||
1f5a89bf AL |
885 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
886 | { | |
887 | while (len && *iovcnt) { | |
888 | if (len < sg->iov_len) { | |
889 | sg->iov_len -= len; | |
890 | sg->iov_base += len; | |
891 | len = 0; | |
892 | } else { | |
893 | len -= sg->iov_len; | |
894 | sg++; | |
895 | *iovcnt -= 1; | |
896 | } | |
897 | } | |
898 | ||
899 | return sg; | |
900 | } | |
901 | ||
902 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
903 | { | |
904 | int i; | |
905 | int total = 0; | |
906 | ||
907 | for (i = 0; i < *cnt; i++) { | |
908 | if ((total + sg[i].iov_len) > cap) { | |
909 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
910 | i++; | |
911 | break; | |
912 | } | |
913 | total += sg[i].iov_len; | |
914 | } | |
915 | ||
916 | *cnt = i; | |
917 | ||
918 | return sg; | |
919 | } | |
920 | ||
921 | static void print_sg(struct iovec *sg, int cnt) | |
922 | { | |
923 | int i; | |
924 | ||
925 | printf("sg[%d]: {", cnt); | |
926 | for (i = 0; i < cnt; i++) { | |
927 | if (i) { | |
928 | printf(", "); | |
929 | } | |
930 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
931 | } | |
932 | printf("}\n"); | |
933 | } | |
934 | ||
8cf89e00 AL |
935 | static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
936 | { | |
937 | V9fsString str; | |
938 | v9fs_string_init(&str); | |
939 | v9fs_string_copy(&str, dst); | |
940 | v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len); | |
941 | v9fs_string_free(&str); | |
942 | } | |
943 | ||
9f107513 AL |
944 | static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
945 | { | |
92c1ad03 AL |
946 | int32_t msize; |
947 | V9fsString version; | |
948 | size_t offset = 7; | |
949 | ||
950 | pdu_unmarshal(pdu, offset, "ds", &msize, &version); | |
951 | ||
952 | if (strcmp(version.data, "9P2000.u")) { | |
953 | v9fs_string_sprintf(&version, "unknown"); | |
9f107513 | 954 | } |
92c1ad03 AL |
955 | |
956 | offset += pdu_marshal(pdu, offset, "ds", msize, &version); | |
957 | complete_pdu(s, pdu, offset); | |
958 | ||
959 | v9fs_string_free(&version); | |
9f107513 AL |
960 | } |
961 | ||
962 | static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) | |
963 | { | |
955efc47 AL |
964 | int32_t fid, afid, n_uname; |
965 | V9fsString uname, aname; | |
966 | V9fsFidState *fidp; | |
967 | V9fsQID qid; | |
968 | size_t offset = 7; | |
969 | ssize_t err; | |
970 | ||
971 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
972 | ||
973 | fidp = alloc_fid(s, fid); | |
974 | if (fidp == NULL) { | |
975 | err = -EINVAL; | |
976 | goto out; | |
9f107513 | 977 | } |
955efc47 AL |
978 | |
979 | fidp->uid = n_uname; | |
980 | ||
981 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
982 | err = fid_to_qid(s, fidp, &qid); | |
983 | if (err) { | |
984 | err = -EINVAL; | |
985 | free_fid(s, fid); | |
986 | goto out; | |
987 | } | |
988 | ||
989 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
990 | ||
991 | err = offset; | |
992 | out: | |
993 | complete_pdu(s, pdu, err); | |
994 | v9fs_string_free(&uname); | |
995 | v9fs_string_free(&aname); | |
9f107513 AL |
996 | } |
997 | ||
4da7d3fa AL |
998 | typedef struct V9fsStatState { |
999 | V9fsPDU *pdu; | |
1000 | size_t offset; | |
1001 | V9fsStat v9stat; | |
1002 | V9fsFidState *fidp; | |
1003 | struct stat stbuf; | |
1004 | } V9fsStatState; | |
1005 | ||
1006 | static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) | |
1007 | { | |
1008 | if (err == -1) { | |
1009 | err = -errno; | |
1010 | goto out; | |
1011 | } | |
1012 | ||
1013 | err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); | |
1014 | if (err) { | |
1015 | goto out; | |
1016 | } | |
1017 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); | |
1018 | err = vs->offset; | |
1019 | ||
1020 | out: | |
1021 | complete_pdu(s, vs->pdu, err); | |
1022 | v9fs_stat_free(&vs->v9stat); | |
1023 | qemu_free(vs); | |
1024 | } | |
1025 | ||
9f107513 AL |
1026 | static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1027 | { | |
4da7d3fa AL |
1028 | int32_t fid; |
1029 | V9fsStatState *vs; | |
1030 | ssize_t err = 0; | |
1031 | ||
1032 | vs = qemu_malloc(sizeof(*vs)); | |
1033 | vs->pdu = pdu; | |
1034 | vs->offset = 7; | |
1035 | ||
1036 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1037 | ||
1038 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1039 | ||
1040 | vs->fidp = lookup_fid(s, fid); | |
1041 | if (vs->fidp == NULL) { | |
1042 | err = -ENOENT; | |
1043 | goto out; | |
9f107513 | 1044 | } |
4da7d3fa AL |
1045 | |
1046 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1047 | v9fs_stat_post_lstat(s, vs, err); | |
1048 | return; | |
1049 | ||
1050 | out: | |
1051 | complete_pdu(s, vs->pdu, err); | |
1052 | v9fs_stat_free(&vs->v9stat); | |
1053 | qemu_free(vs); | |
9f107513 AL |
1054 | } |
1055 | ||
ff5e54c9 AL |
1056 | typedef struct V9fsWalkState { |
1057 | V9fsPDU *pdu; | |
1058 | size_t offset; | |
1059 | int16_t nwnames; | |
1060 | int name_idx; | |
1061 | V9fsQID *qids; | |
1062 | V9fsFidState *fidp; | |
1063 | V9fsFidState *newfidp; | |
1064 | V9fsString path; | |
1065 | V9fsString *wnames; | |
1066 | struct stat stbuf; | |
1067 | } V9fsWalkState; | |
1068 | ||
1069 | static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) | |
1070 | { | |
1071 | complete_pdu(s, vs->pdu, err); | |
1072 | ||
1073 | if (vs->nwnames) { | |
1074 | for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { | |
1075 | v9fs_string_free(&vs->wnames[vs->name_idx]); | |
1076 | } | |
1077 | ||
1078 | qemu_free(vs->wnames); | |
1079 | qemu_free(vs->qids); | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | static void v9fs_walk_marshal(V9fsWalkState *vs) | |
1084 | { | |
1085 | int i; | |
1086 | vs->offset = 7; | |
1087 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames); | |
1088 | ||
1089 | for (i = 0; i < vs->nwnames; i++) { | |
1090 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1095 | int err) | |
1096 | { | |
1097 | if (err == -1) { | |
1098 | free_fid(s, vs->newfidp->fid); | |
1099 | v9fs_string_free(&vs->path); | |
1100 | err = -ENOENT; | |
1101 | goto out; | |
1102 | } | |
1103 | ||
1104 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1105 | ||
1106 | vs->name_idx++; | |
1107 | if (vs->name_idx < vs->nwnames) { | |
1108 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1109 | vs->wnames[vs->name_idx].data); | |
1110 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1111 | ||
1112 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1113 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1114 | return; | |
1115 | } | |
1116 | ||
1117 | v9fs_string_free(&vs->path); | |
1118 | v9fs_walk_marshal(vs); | |
1119 | err = vs->offset; | |
1120 | out: | |
1121 | v9fs_walk_complete(s, vs, err); | |
1122 | } | |
1123 | ||
1124 | static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1125 | int err) | |
1126 | { | |
1127 | if (err == -1) { | |
1128 | v9fs_string_free(&vs->path); | |
1129 | err = -ENOENT; | |
1130 | goto out; | |
1131 | } | |
1132 | ||
1133 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1134 | vs->name_idx++; | |
1135 | if (vs->name_idx < vs->nwnames) { | |
1136 | ||
1137 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1138 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1139 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1140 | ||
1141 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1142 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1143 | return; | |
1144 | } | |
1145 | ||
1146 | v9fs_string_free(&vs->path); | |
1147 | v9fs_walk_marshal(vs); | |
1148 | err = vs->offset; | |
1149 | out: | |
1150 | v9fs_walk_complete(s, vs, err); | |
1151 | } | |
1152 | ||
9f107513 AL |
1153 | static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1154 | { | |
ff5e54c9 AL |
1155 | int32_t fid, newfid; |
1156 | V9fsWalkState *vs; | |
1157 | int err = 0; | |
1158 | int i; | |
1159 | ||
1160 | vs = qemu_malloc(sizeof(*vs)); | |
1161 | vs->pdu = pdu; | |
1162 | vs->wnames = NULL; | |
1163 | vs->qids = NULL; | |
1164 | vs->offset = 7; | |
1165 | ||
1166 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid, | |
1167 | &newfid, &vs->nwnames); | |
1168 | ||
1169 | if (vs->nwnames) { | |
1170 | vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); | |
1171 | ||
1172 | vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); | |
1173 | ||
1174 | for (i = 0; i < vs->nwnames; i++) { | |
1175 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s", | |
1176 | &vs->wnames[i]); | |
1177 | } | |
1178 | } | |
1179 | ||
1180 | vs->fidp = lookup_fid(s, fid); | |
1181 | if (vs->fidp == NULL) { | |
1182 | err = -ENOENT; | |
1183 | goto out; | |
1184 | } | |
1185 | ||
1186 | /* FIXME: is this really valid? */ | |
1187 | if (fid == newfid) { | |
1188 | ||
1189 | BUG_ON(vs->fidp->fd != -1); | |
1190 | BUG_ON(vs->fidp->dir); | |
1191 | v9fs_string_init(&vs->path); | |
1192 | vs->name_idx = 0; | |
1193 | ||
1194 | if (vs->name_idx < vs->nwnames) { | |
1195 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1196 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1197 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1198 | ||
1199 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1200 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1201 | return; | |
1202 | } | |
1203 | } else { | |
1204 | vs->newfidp = alloc_fid(s, newfid); | |
1205 | if (vs->newfidp == NULL) { | |
1206 | err = -EINVAL; | |
1207 | goto out; | |
1208 | } | |
1209 | ||
1210 | vs->newfidp->uid = vs->fidp->uid; | |
1211 | v9fs_string_init(&vs->path); | |
1212 | vs->name_idx = 0; | |
1213 | v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); | |
1214 | ||
1215 | if (vs->name_idx < vs->nwnames) { | |
1216 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1217 | vs->wnames[vs->name_idx].data); | |
1218 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1219 | ||
1220 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1221 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1222 | return; | |
1223 | } | |
9f107513 | 1224 | } |
ff5e54c9 AL |
1225 | |
1226 | v9fs_walk_marshal(vs); | |
1227 | err = vs->offset; | |
1228 | out: | |
1229 | v9fs_walk_complete(s, vs, err); | |
9f107513 AL |
1230 | } |
1231 | ||
a6568fe2 AL |
1232 | typedef struct V9fsOpenState { |
1233 | V9fsPDU *pdu; | |
1234 | size_t offset; | |
1235 | int8_t mode; | |
1236 | V9fsFidState *fidp; | |
1237 | V9fsQID qid; | |
1238 | struct stat stbuf; | |
1239 | ||
1240 | } V9fsOpenState; | |
1241 | ||
1242 | enum { | |
1243 | Oread = 0x00, | |
1244 | Owrite = 0x01, | |
1245 | Ordwr = 0x02, | |
1246 | Oexec = 0x03, | |
1247 | Oexcl = 0x04, | |
1248 | Otrunc = 0x10, | |
1249 | Orexec = 0x20, | |
1250 | Orclose = 0x40, | |
1251 | Oappend = 0x80, | |
1252 | }; | |
1253 | ||
1254 | static int omode_to_uflags(int8_t mode) | |
9f107513 | 1255 | { |
a6568fe2 AL |
1256 | int ret = 0; |
1257 | ||
1258 | switch (mode & 3) { | |
1259 | case Oread: | |
1260 | ret = O_RDONLY; | |
1261 | break; | |
1262 | case Ordwr: | |
1263 | ret = O_RDWR; | |
1264 | break; | |
1265 | case Owrite: | |
1266 | ret = O_WRONLY; | |
1267 | break; | |
1268 | case Oexec: | |
1269 | ret = O_RDONLY; | |
1270 | break; | |
1271 | } | |
1272 | ||
1273 | if (mode & Otrunc) { | |
1274 | ret |= O_TRUNC; | |
1275 | } | |
1276 | ||
1277 | if (mode & Oappend) { | |
1278 | ret |= O_APPEND; | |
9f107513 | 1279 | } |
a6568fe2 AL |
1280 | |
1281 | if (mode & Oexcl) { | |
1282 | ret |= O_EXCL; | |
1283 | } | |
1284 | ||
1285 | return ret; | |
1286 | } | |
1287 | ||
1288 | static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) | |
1289 | { | |
1290 | if (vs->fidp->dir == NULL) { | |
1291 | err = -errno; | |
1292 | goto out; | |
1293 | } | |
1294 | ||
1295 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1296 | err = vs->offset; | |
1297 | out: | |
1298 | complete_pdu(s, vs->pdu, err); | |
1299 | qemu_free(vs); | |
1300 | ||
1301 | } | |
1302 | ||
1303 | static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) | |
1304 | { | |
1305 | if (vs->fidp->fd == -1) { | |
1306 | err = -errno; | |
1307 | goto out; | |
1308 | } | |
1309 | ||
1310 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1311 | err = vs->offset; | |
1312 | out: | |
1313 | complete_pdu(s, vs->pdu, err); | |
1314 | qemu_free(vs); | |
1315 | } | |
1316 | ||
1317 | static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) | |
1318 | { | |
1319 | if (err) { | |
1320 | err = -errno; | |
1321 | goto out; | |
1322 | } | |
1323 | ||
1324 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1325 | ||
1326 | if (S_ISDIR(vs->stbuf.st_mode)) { | |
1327 | vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path); | |
1328 | v9fs_open_post_opendir(s, vs, err); | |
1329 | } else { | |
1330 | vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, | |
1331 | omode_to_uflags(vs->mode)); | |
1332 | v9fs_open_post_open(s, vs, err); | |
1333 | } | |
1334 | return; | |
1335 | out: | |
1336 | complete_pdu(s, vs->pdu, err); | |
1337 | qemu_free(vs); | |
9f107513 AL |
1338 | } |
1339 | ||
1340 | static void v9fs_open(V9fsState *s, V9fsPDU *pdu) | |
a6568fe2 AL |
1341 | { |
1342 | int32_t fid; | |
1343 | V9fsOpenState *vs; | |
1344 | ssize_t err = 0; | |
1345 | ||
1346 | ||
1347 | vs = qemu_malloc(sizeof(*vs)); | |
1348 | vs->pdu = pdu; | |
1349 | vs->offset = 7; | |
1350 | ||
1351 | pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode); | |
1352 | ||
1353 | vs->fidp = lookup_fid(s, fid); | |
1354 | if (vs->fidp == NULL) { | |
1355 | err = -ENOENT; | |
1356 | goto out; | |
1357 | } | |
1358 | ||
1359 | BUG_ON(vs->fidp->fd != -1); | |
1360 | BUG_ON(vs->fidp->dir); | |
1361 | ||
1362 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1363 | ||
1364 | v9fs_open_post_lstat(s, vs, err); | |
1365 | return; | |
1366 | out: | |
1367 | complete_pdu(s, pdu, err); | |
1368 | qemu_free(vs); | |
1369 | } | |
1370 | ||
1371 | static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) | |
1372 | { | |
bbd5697b AL |
1373 | int32_t fid; |
1374 | size_t offset = 7; | |
1375 | int err; | |
1376 | ||
1377 | pdu_unmarshal(pdu, offset, "d", &fid); | |
1378 | ||
1379 | err = free_fid(s, fid); | |
1380 | if (err < 0) { | |
1381 | goto out; | |
a6568fe2 | 1382 | } |
bbd5697b AL |
1383 | |
1384 | offset = 7; | |
1385 | err = offset; | |
1386 | out: | |
1387 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1388 | } |
1389 | ||
a9231555 AL |
1390 | typedef struct V9fsReadState { |
1391 | V9fsPDU *pdu; | |
1392 | size_t offset; | |
1393 | int32_t count; | |
1394 | int32_t total; | |
1395 | int64_t off; | |
1396 | V9fsFidState *fidp; | |
1397 | struct iovec iov[128]; /* FIXME: bad, bad, bad */ | |
1398 | struct iovec *sg; | |
1399 | off_t dir_pos; | |
1400 | struct dirent *dent; | |
1401 | struct stat stbuf; | |
1402 | V9fsString name; | |
1403 | V9fsStat v9stat; | |
1404 | int32_t len; | |
1405 | int32_t cnt; | |
1406 | int32_t max_count; | |
1407 | } V9fsReadState; | |
1408 | ||
1409 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); | |
1410 | ||
1411 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1412 | { | |
1413 | if (err) { | |
1414 | goto out; | |
1415 | } | |
1416 | v9fs_stat_free(&vs->v9stat); | |
1417 | v9fs_string_free(&vs->name); | |
1418 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1419 | vs->offset += vs->count; | |
1420 | err = vs->offset; | |
1421 | out: | |
1422 | complete_pdu(s, vs->pdu, err); | |
1423 | qemu_free(vs); | |
1424 | return; | |
1425 | } | |
1426 | ||
1427 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1428 | ssize_t err) | |
1429 | { | |
1430 | if (err) { | |
1431 | err = -errno; | |
1432 | goto out; | |
1433 | } | |
1434 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1435 | if (err) { | |
1436 | goto out; | |
1437 | } | |
1438 | ||
1439 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1440 | &vs->v9stat); | |
1441 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1442 | ((vs->count + vs->len) > vs->max_count)) { | |
1443 | v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); | |
1444 | v9fs_read_post_seekdir(s, vs, err); | |
1445 | return; | |
1446 | } | |
1447 | vs->count += vs->len; | |
1448 | v9fs_stat_free(&vs->v9stat); | |
1449 | v9fs_string_free(&vs->name); | |
1450 | vs->dir_pos = vs->dent->d_off; | |
1451 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
1452 | v9fs_read_post_readdir(s, vs, err); | |
1453 | return; | |
1454 | out: | |
1455 | v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); | |
1456 | v9fs_read_post_seekdir(s, vs, err); | |
1457 | return; | |
1458 | ||
1459 | } | |
1460 | ||
1461 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1462 | { | |
1463 | if (vs->dent) { | |
1464 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1465 | v9fs_string_init(&vs->name); | |
1466 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1467 | vs->dent->d_name); | |
1468 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1469 | v9fs_read_post_dir_lstat(s, vs, err); | |
1470 | return; | |
1471 | } | |
1472 | ||
1473 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1474 | vs->offset += vs->count; | |
1475 | err = vs->offset; | |
1476 | complete_pdu(s, vs->pdu, err); | |
1477 | qemu_free(vs); | |
1478 | return; | |
1479 | } | |
1480 | ||
1481 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1482 | { | |
1483 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
1484 | v9fs_read_post_readdir(s, vs, err); | |
1485 | return; | |
1486 | } | |
1487 | ||
1488 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1489 | ssize_t err) | |
1490 | { | |
1491 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir); | |
1492 | v9fs_read_post_telldir(s, vs, err); | |
1493 | return; | |
1494 | } | |
1495 | ||
1496 | static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1497 | { | |
1498 | if (err < 0) { | |
1499 | /* IO error return the error */ | |
1500 | err = -errno; | |
1501 | goto out; | |
1502 | } | |
1503 | vs->total += vs->len; | |
1504 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1505 | if (vs->total < vs->count && vs->len > 0) { | |
1506 | do { | |
1507 | if (0) { | |
1508 | print_sg(vs->sg, vs->cnt); | |
1509 | } | |
1510 | vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1511 | } while (vs->len == -1 && errno == EINTR); | |
1512 | if (vs->len == -1) { | |
1513 | err = -errno; | |
1514 | } | |
1515 | v9fs_read_post_readv(s, vs, err); | |
1516 | return; | |
1517 | } | |
1518 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1519 | vs->offset += vs->count; | |
1520 | err = vs->offset; | |
1521 | ||
1522 | out: | |
1523 | complete_pdu(s, vs->pdu, err); | |
1524 | qemu_free(vs); | |
1525 | } | |
1526 | ||
1527 | static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1528 | { | |
1529 | if (err == -1) { | |
1530 | err = -errno; | |
1531 | goto out; | |
1532 | } | |
1533 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
1534 | ||
1535 | if (vs->total < vs->count) { | |
1536 | do { | |
1537 | if (0) { | |
1538 | print_sg(vs->sg, vs->cnt); | |
1539 | } | |
1540 | vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1541 | } while (vs->len == -1 && errno == EINTR); | |
1542 | if (vs->len == -1) { | |
1543 | err = -errno; | |
1544 | } | |
1545 | v9fs_read_post_readv(s, vs, err); | |
1546 | return; | |
1547 | } | |
1548 | out: | |
1549 | complete_pdu(s, vs->pdu, err); | |
1550 | qemu_free(vs); | |
1551 | } | |
1552 | ||
9f107513 AL |
1553 | static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
1554 | { | |
a9231555 AL |
1555 | int32_t fid; |
1556 | V9fsReadState *vs; | |
1557 | ssize_t err = 0; | |
1558 | ||
1559 | vs = qemu_malloc(sizeof(*vs)); | |
1560 | vs->pdu = pdu; | |
1561 | vs->offset = 7; | |
1562 | vs->total = 0; | |
1563 | vs->len = 0; | |
1564 | vs->count = 0; | |
1565 | ||
1566 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
1567 | ||
1568 | vs->fidp = lookup_fid(s, fid); | |
1569 | if (vs->fidp == NULL) { | |
1570 | err = -EINVAL; | |
1571 | goto out; | |
1572 | } | |
1573 | ||
1574 | if (vs->fidp->dir) { | |
1575 | vs->max_count = vs->count; | |
1576 | vs->count = 0; | |
1577 | if (vs->off == 0) { | |
1578 | v9fs_do_rewinddir(s, vs->fidp->dir); | |
1579 | } | |
1580 | v9fs_read_post_rewinddir(s, vs, err); | |
1581 | return; | |
1582 | } else if (vs->fidp->fd != -1) { | |
1583 | vs->sg = vs->iov; | |
1584 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
1585 | err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); | |
1586 | v9fs_read_post_lseek(s, vs, err); | |
1587 | return; | |
1588 | } else { | |
1589 | err = -EINVAL; | |
9f107513 | 1590 | } |
a9231555 AL |
1591 | out: |
1592 | complete_pdu(s, pdu, err); | |
1593 | qemu_free(vs); | |
9f107513 AL |
1594 | } |
1595 | ||
8449360c AL |
1596 | typedef struct V9fsWriteState { |
1597 | V9fsPDU *pdu; | |
1598 | size_t offset; | |
1599 | int32_t len; | |
1600 | int32_t count; | |
1601 | int32_t total; | |
1602 | int64_t off; | |
1603 | V9fsFidState *fidp; | |
1604 | struct iovec iov[128]; /* FIXME: bad, bad, bad */ | |
1605 | struct iovec *sg; | |
1606 | int cnt; | |
1607 | } V9fsWriteState; | |
1608 | ||
1609 | static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, | |
1610 | ssize_t err) | |
1611 | { | |
1612 | if (err < 0) { | |
1613 | /* IO error return the error */ | |
1614 | err = -errno; | |
1615 | goto out; | |
1616 | } | |
1617 | vs->total += vs->len; | |
1618 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1619 | if (vs->total < vs->count && vs->len > 0) { | |
1620 | do { | |
1621 | if (0) { | |
1622 | print_sg(vs->sg, vs->cnt); | |
1623 | } | |
1624 | vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1625 | } while (vs->len == -1 && errno == EINTR); | |
1626 | if (vs->len == -1) { | |
1627 | err = -errno; | |
1628 | } | |
1629 | v9fs_write_post_writev(s, vs, err); | |
1630 | return; | |
1631 | } | |
1632 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1633 | ||
1634 | err = vs->offset; | |
1635 | out: | |
1636 | complete_pdu(s, vs->pdu, err); | |
1637 | qemu_free(vs); | |
1638 | } | |
1639 | ||
1640 | static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) | |
1641 | { | |
1642 | if (err == -1) { | |
1643 | err = -errno; | |
1644 | goto out; | |
1645 | } | |
1646 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
1647 | ||
1648 | if (vs->total < vs->count) { | |
1649 | do { | |
1650 | if (0) { | |
1651 | print_sg(vs->sg, vs->cnt); | |
1652 | } | |
1653 | vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1654 | } while (vs->len == -1 && errno == EINTR); | |
1655 | if (vs->len == -1) { | |
1656 | err = -errno; | |
1657 | } | |
1658 | v9fs_write_post_writev(s, vs, err); | |
1659 | return; | |
1660 | } | |
1661 | ||
1662 | out: | |
1663 | complete_pdu(s, vs->pdu, err); | |
1664 | qemu_free(vs); | |
1665 | } | |
1666 | ||
9f107513 AL |
1667 | static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
1668 | { | |
8449360c AL |
1669 | int32_t fid; |
1670 | V9fsWriteState *vs; | |
1671 | ssize_t err; | |
1672 | ||
1673 | vs = qemu_malloc(sizeof(*vs)); | |
1674 | ||
1675 | vs->pdu = pdu; | |
1676 | vs->offset = 7; | |
1677 | vs->sg = vs->iov; | |
1678 | vs->total = 0; | |
1679 | vs->len = 0; | |
1680 | ||
1681 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
1682 | vs->sg, &vs->cnt); | |
1683 | ||
1684 | vs->fidp = lookup_fid(s, fid); | |
1685 | if (vs->fidp == NULL) { | |
1686 | err = -EINVAL; | |
1687 | goto out; | |
9f107513 | 1688 | } |
8449360c AL |
1689 | |
1690 | if (vs->fidp->fd == -1) { | |
1691 | err = -EINVAL; | |
1692 | goto out; | |
1693 | } | |
1694 | ||
1695 | err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); | |
1696 | ||
1697 | v9fs_write_post_lseek(s, vs, err); | |
1698 | return; | |
1699 | ||
1700 | out: | |
1701 | complete_pdu(s, vs->pdu, err); | |
1702 | qemu_free(vs); | |
9f107513 AL |
1703 | } |
1704 | ||
c494dd6f AL |
1705 | typedef struct V9fsCreateState { |
1706 | V9fsPDU *pdu; | |
1707 | size_t offset; | |
1708 | V9fsFidState *fidp; | |
1709 | V9fsQID qid; | |
1710 | int32_t perm; | |
1711 | int8_t mode; | |
1712 | struct stat stbuf; | |
1713 | V9fsString name; | |
1714 | V9fsString extension; | |
1715 | V9fsString fullname; | |
1716 | } V9fsCreateState; | |
1717 | ||
1718 | static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) | |
1719 | { | |
1720 | if (err == 0) { | |
1721 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
1722 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1723 | ||
1724 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1725 | ||
1726 | err = vs->offset; | |
1727 | } | |
1728 | ||
1729 | complete_pdu(s, vs->pdu, err); | |
1730 | v9fs_string_free(&vs->name); | |
1731 | v9fs_string_free(&vs->extension); | |
1732 | v9fs_string_free(&vs->fullname); | |
1733 | qemu_free(vs); | |
1734 | } | |
1735 | ||
1736 | static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) | |
1737 | { | |
1738 | if (err) { | |
1739 | err = -errno; | |
1740 | } | |
1741 | v9fs_post_create(s, vs, err); | |
1742 | } | |
1743 | ||
1744 | static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, | |
1745 | int err) | |
1746 | { | |
1747 | if (!vs->fidp->dir) { | |
1748 | err = -errno; | |
1749 | } | |
1750 | v9fs_post_create(s, vs, err); | |
1751 | } | |
1752 | ||
1753 | static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, | |
1754 | int err) | |
1755 | { | |
1756 | if (err) { | |
1757 | err = -errno; | |
1758 | goto out; | |
1759 | } | |
1760 | ||
1761 | vs->fidp->dir = v9fs_do_opendir(s, &vs->fullname); | |
1762 | v9fs_create_post_opendir(s, vs, err); | |
1763 | return; | |
1764 | ||
1765 | out: | |
1766 | v9fs_post_create(s, vs, err); | |
1767 | } | |
1768 | ||
1769 | static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) | |
1770 | { | |
1771 | if (err) { | |
1772 | err = -errno; | |
1773 | goto out; | |
1774 | } | |
1775 | ||
1776 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1777 | v9fs_create_post_dir_lstat(s, vs, err); | |
1778 | return; | |
1779 | ||
1780 | out: | |
1781 | v9fs_post_create(s, vs, err); | |
1782 | } | |
1783 | ||
1784 | static void v9fs_create_post_mksock(V9fsState *s, V9fsCreateState *vs, | |
1785 | int err) | |
1786 | { | |
1787 | if (err) { | |
1788 | err = -errno; | |
1789 | goto out; | |
1790 | } | |
1791 | ||
1792 | err = v9fs_do_chmod(s, &vs->fullname, vs->perm & 0777); | |
1793 | v9fs_create_post_perms(s, vs, err); | |
1794 | return; | |
1795 | ||
1796 | out: | |
1797 | v9fs_post_create(s, vs, err); | |
1798 | } | |
1799 | ||
1800 | static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) | |
1801 | { | |
1802 | if (err) { | |
1803 | vs->fidp->fd = -1; | |
1804 | err = -errno; | |
1805 | } | |
1806 | ||
1807 | v9fs_post_create(s, vs, err); | |
1808 | return; | |
1809 | } | |
1810 | ||
1811 | static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) | |
1812 | { | |
1813 | if (vs->fidp->fd == -1) { | |
1814 | err = -errno; | |
1815 | goto out; | |
1816 | } | |
1817 | ||
1818 | err = v9fs_do_fstat(s, vs->fidp->fd, &vs->stbuf); | |
1819 | v9fs_create_post_fstat(s, vs, err); | |
1820 | ||
1821 | return; | |
1822 | ||
1823 | out: | |
1824 | v9fs_post_create(s, vs, err); | |
1825 | ||
1826 | } | |
1827 | ||
1828 | static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) | |
1829 | { | |
1830 | ||
1831 | if (err == 0 || errno != ENOENT) { | |
1832 | err = -errno; | |
1833 | goto out; | |
1834 | } | |
1835 | ||
1836 | if (vs->perm & P9_STAT_MODE_DIR) { | |
1837 | err = v9fs_do_mkdir(s, &vs->fullname, vs->perm & 0777); | |
1838 | v9fs_create_post_mkdir(s, vs, err); | |
1839 | } else if (vs->perm & P9_STAT_MODE_SYMLINK) { | |
1840 | err = v9fs_do_symlink(s, &vs->extension, &vs->fullname); | |
1841 | v9fs_create_post_perms(s, vs, err); | |
1842 | } else if (vs->perm & P9_STAT_MODE_LINK) { | |
1843 | int32_t nfid = atoi(vs->extension.data); | |
1844 | V9fsFidState *nfidp = lookup_fid(s, nfid); | |
1845 | if (nfidp == NULL) { | |
1846 | err = -errno; | |
1847 | v9fs_post_create(s, vs, err); | |
1848 | } | |
1849 | err = v9fs_do_link(s, &nfidp->path, &vs->fullname); | |
1850 | v9fs_create_post_perms(s, vs, err); | |
1851 | } else if (vs->perm & P9_STAT_MODE_DEVICE) { | |
1852 | char ctype; | |
1853 | uint32_t major, minor; | |
1854 | mode_t nmode = 0; | |
1855 | ||
1856 | if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, | |
1857 | &minor) != 3) { | |
1858 | err = -errno; | |
1859 | v9fs_post_create(s, vs, err); | |
1860 | } | |
1861 | ||
1862 | switch (ctype) { | |
1863 | case 'c': | |
1864 | nmode = S_IFCHR; | |
1865 | break; | |
1866 | case 'b': | |
1867 | nmode = S_IFBLK; | |
1868 | break; | |
1869 | default: | |
1870 | err = -EIO; | |
1871 | v9fs_post_create(s, vs, err); | |
1872 | } | |
1873 | ||
1874 | nmode |= vs->perm & 0777; | |
1875 | err = v9fs_do_mknod(s, &vs->fullname, nmode, makedev(major, minor)); | |
1876 | v9fs_create_post_perms(s, vs, err); | |
1877 | } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { | |
1878 | err = v9fs_do_mknod(s, &vs->fullname, S_IFIFO | (vs->mode & 0777), 0); | |
1879 | v9fs_post_create(s, vs, err); | |
1880 | } else if (vs->perm & P9_STAT_MODE_SOCKET) { | |
1881 | err = v9fs_do_mksock(s, &vs->fullname); | |
1882 | v9fs_create_post_mksock(s, vs, err); | |
1883 | } else { | |
1884 | vs->fidp->fd = v9fs_do_open2(s, &vs->fullname, | |
1885 | omode_to_uflags(vs->mode) | O_CREAT, | |
1886 | vs->perm & 0777); | |
1887 | v9fs_create_post_open2(s, vs, err); | |
1888 | } | |
1889 | ||
1890 | return; | |
1891 | ||
1892 | out: | |
1893 | v9fs_post_create(s, vs, err); | |
1894 | } | |
1895 | ||
9f107513 AL |
1896 | static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
1897 | { | |
c494dd6f AL |
1898 | int32_t fid; |
1899 | V9fsCreateState *vs; | |
1900 | int err = 0; | |
1901 | ||
1902 | vs = qemu_malloc(sizeof(*vs)); | |
1903 | vs->pdu = pdu; | |
1904 | vs->offset = 7; | |
1905 | ||
1906 | v9fs_string_init(&vs->fullname); | |
1907 | ||
1908 | pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name, | |
1909 | &vs->perm, &vs->mode, &vs->extension); | |
1910 | ||
1911 | vs->fidp = lookup_fid(s, fid); | |
1912 | if (vs->fidp == NULL) { | |
1913 | err = -EINVAL; | |
1914 | goto out; | |
9f107513 | 1915 | } |
c494dd6f AL |
1916 | |
1917 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
1918 | vs->name.data); | |
1919 | ||
1920 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1921 | v9fs_create_post_lstat(s, vs, err); | |
1922 | return; | |
1923 | ||
1924 | out: | |
1925 | complete_pdu(s, vs->pdu, err); | |
1926 | v9fs_string_free(&vs->name); | |
1927 | v9fs_string_free(&vs->extension); | |
1928 | qemu_free(vs); | |
9f107513 AL |
1929 | } |
1930 | ||
1931 | static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) | |
1932 | { | |
9c5e9d89 AL |
1933 | /* A nop call with no return */ |
1934 | complete_pdu(s, pdu, 7); | |
9f107513 AL |
1935 | } |
1936 | ||
5bae1900 AL |
1937 | typedef struct V9fsRemoveState { |
1938 | V9fsPDU *pdu; | |
1939 | size_t offset; | |
1940 | V9fsFidState *fidp; | |
1941 | } V9fsRemoveState; | |
1942 | ||
1943 | static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, | |
1944 | int err) | |
1945 | { | |
1946 | /* For TREMOVE we need to clunk the fid even on failed remove */ | |
1947 | err = free_fid(s, vs->fidp->fid); | |
1948 | if (err < 0) { | |
1949 | goto out; | |
1950 | } | |
1951 | ||
1952 | err = vs->offset; | |
1953 | out: | |
1954 | complete_pdu(s, vs->pdu, err); | |
1955 | qemu_free(vs); | |
1956 | } | |
1957 | ||
9f107513 AL |
1958 | static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
1959 | { | |
5bae1900 AL |
1960 | int32_t fid; |
1961 | V9fsRemoveState *vs; | |
1962 | int err = 0; | |
1963 | ||
1964 | vs = qemu_malloc(sizeof(*vs)); | |
1965 | vs->pdu = pdu; | |
1966 | vs->offset = 7; | |
1967 | ||
1968 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1969 | ||
1970 | vs->fidp = lookup_fid(s, fid); | |
1971 | if (vs->fidp == NULL) { | |
1972 | err = -EINVAL; | |
1973 | goto out; | |
9f107513 | 1974 | } |
5bae1900 AL |
1975 | |
1976 | err = v9fs_do_remove(s, &vs->fidp->path); | |
1977 | v9fs_remove_post_remove(s, vs, err); | |
1978 | return; | |
1979 | ||
1980 | out: | |
1981 | complete_pdu(s, pdu, err); | |
1982 | qemu_free(vs); | |
9f107513 AL |
1983 | } |
1984 | ||
8cf89e00 AL |
1985 | typedef struct V9fsWstatState |
1986 | { | |
1987 | V9fsPDU *pdu; | |
1988 | size_t offset; | |
1989 | int16_t unused; | |
1990 | V9fsStat v9stat; | |
1991 | V9fsFidState *fidp; | |
1992 | struct stat stbuf; | |
1993 | V9fsString nname; | |
1994 | } V9fsWstatState; | |
1995 | ||
1996 | static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) | |
1997 | { | |
1998 | if (err < 0) { | |
1999 | goto out; | |
2000 | } | |
2001 | ||
2002 | err = vs->offset; | |
2003 | ||
2004 | out: | |
2005 | v9fs_stat_free(&vs->v9stat); | |
2006 | complete_pdu(s, vs->pdu, err); | |
2007 | qemu_free(vs); | |
2008 | } | |
2009 | ||
2010 | static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) | |
2011 | { | |
2012 | if (err < 0) { | |
2013 | goto out; | |
2014 | } | |
2015 | ||
2016 | if (vs->v9stat.name.size != 0) { | |
2017 | v9fs_string_free(&vs->nname); | |
2018 | } | |
2019 | ||
2020 | if (vs->v9stat.length != -1) { | |
2021 | if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { | |
2022 | err = -errno; | |
2023 | } | |
2024 | } | |
2025 | v9fs_wstat_post_truncate(s, vs, err); | |
2026 | return; | |
2027 | ||
2028 | out: | |
2029 | v9fs_stat_free(&vs->v9stat); | |
2030 | complete_pdu(s, vs->pdu, err); | |
2031 | qemu_free(vs); | |
2032 | } | |
2033 | ||
2034 | static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) | |
2035 | { | |
2036 | V9fsFidState *fidp; | |
2037 | if (err < 0) { | |
2038 | goto out; | |
2039 | } | |
2040 | ||
2041 | if (vs->v9stat.name.size != 0) { | |
2042 | char *old_name, *new_name; | |
2043 | char *end; | |
2044 | ||
2045 | old_name = vs->fidp->path.data; | |
2046 | end = strrchr(old_name, '/'); | |
2047 | if (end) { | |
2048 | end++; | |
2049 | } else { | |
2050 | end = old_name; | |
2051 | } | |
2052 | ||
2053 | new_name = qemu_malloc(end - old_name + vs->v9stat.name.size + 1); | |
2054 | ||
2055 | memset(new_name, 0, end - old_name + vs->v9stat.name.size + 1); | |
2056 | memcpy(new_name, old_name, end - old_name); | |
2057 | memcpy(new_name + (end - old_name), vs->v9stat.name.data, | |
2058 | vs->v9stat.name.size); | |
2059 | vs->nname.data = new_name; | |
2060 | vs->nname.size = strlen(new_name); | |
2061 | ||
2062 | if (strcmp(new_name, vs->fidp->path.data) != 0) { | |
2063 | if (v9fs_do_rename(s, &vs->fidp->path, &vs->nname)) { | |
2064 | err = -errno; | |
2065 | } else { | |
2066 | /* | |
2067 | * Fixup fid's pointing to the old name to | |
2068 | * start pointing to the new name | |
2069 | */ | |
2070 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2071 | ||
2072 | if (vs->fidp == fidp) { | |
2073 | /* | |
2074 | * we replace name of this fid towards the end | |
2075 | * so that our below strcmp will work | |
2076 | */ | |
2077 | continue; | |
2078 | } | |
2079 | if (!strncmp(vs->fidp->path.data, fidp->path.data, | |
2080 | strlen(vs->fidp->path.data))) { | |
2081 | /* replace the name */ | |
2082 | v9fs_fix_path(&fidp->path, &vs->nname, | |
2083 | strlen(vs->fidp->path.data)); | |
2084 | } | |
2085 | } | |
2086 | v9fs_string_copy(&vs->fidp->path, &vs->nname); | |
2087 | } | |
2088 | } | |
2089 | } | |
2090 | v9fs_wstat_post_rename(s, vs, err); | |
2091 | return; | |
2092 | ||
2093 | out: | |
2094 | v9fs_stat_free(&vs->v9stat); | |
2095 | complete_pdu(s, vs->pdu, err); | |
2096 | qemu_free(vs); | |
2097 | } | |
2098 | ||
2099 | static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) | |
2100 | { | |
2101 | if (err < 0) { | |
2102 | goto out; | |
2103 | } | |
2104 | ||
2105 | if (vs->v9stat.n_gid != -1) { | |
2106 | if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid, | |
2107 | vs->v9stat.n_gid)) { | |
2108 | err = -errno; | |
2109 | } | |
2110 | } | |
2111 | v9fs_wstat_post_chown(s, vs, err); | |
2112 | return; | |
2113 | ||
2114 | out: | |
2115 | v9fs_stat_free(&vs->v9stat); | |
2116 | complete_pdu(s, vs->pdu, err); | |
2117 | qemu_free(vs); | |
2118 | } | |
2119 | ||
2120 | static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) | |
2121 | { | |
2122 | if (err < 0) { | |
2123 | goto out; | |
2124 | } | |
2125 | ||
2126 | if (vs->v9stat.mtime != -1) { | |
2127 | struct utimbuf tb; | |
2128 | tb.actime = 0; | |
2129 | tb.modtime = vs->v9stat.mtime; | |
2130 | if (v9fs_do_utime(s, &vs->fidp->path, &tb)) { | |
2131 | err = -errno; | |
2132 | } | |
2133 | } | |
2134 | ||
2135 | v9fs_wstat_post_utime(s, vs, err); | |
2136 | return; | |
2137 | ||
2138 | out: | |
2139 | v9fs_stat_free(&vs->v9stat); | |
2140 | complete_pdu(s, vs->pdu, err); | |
2141 | qemu_free(vs); | |
2142 | } | |
2143 | ||
2144 | static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) | |
2145 | { | |
2146 | if (err == -1) { | |
2147 | err = -errno; | |
2148 | } | |
2149 | v9fs_stat_free(&vs->v9stat); | |
2150 | complete_pdu(s, vs->pdu, err); | |
2151 | qemu_free(vs); | |
2152 | } | |
2153 | ||
2154 | static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) | |
2155 | { | |
2156 | uint32_t v9_mode; | |
2157 | ||
2158 | if (err == -1) { | |
2159 | err = -errno; | |
2160 | goto out; | |
2161 | } | |
2162 | ||
2163 | v9_mode = stat_to_v9mode(&vs->stbuf); | |
2164 | ||
2165 | if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2166 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2167 | /* Attempting to change the type */ | |
2168 | err = -EIO; | |
2169 | goto out; | |
2170 | } | |
2171 | ||
2172 | if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode, | |
2173 | &vs->v9stat.extension))) { | |
2174 | err = -errno; | |
2175 | } | |
2176 | v9fs_wstat_post_chmod(s, vs, err); | |
2177 | return; | |
2178 | ||
2179 | out: | |
2180 | v9fs_stat_free(&vs->v9stat); | |
2181 | complete_pdu(s, vs->pdu, err); | |
2182 | qemu_free(vs); | |
2183 | } | |
2184 | ||
9f107513 AL |
2185 | static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2186 | { | |
8cf89e00 AL |
2187 | int32_t fid; |
2188 | V9fsWstatState *vs; | |
2189 | int err = 0; | |
2190 | ||
2191 | vs = qemu_malloc(sizeof(*vs)); | |
2192 | vs->pdu = pdu; | |
2193 | vs->offset = 7; | |
2194 | ||
2195 | pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat); | |
2196 | ||
2197 | vs->fidp = lookup_fid(s, fid); | |
2198 | if (vs->fidp == NULL) { | |
2199 | err = -EINVAL; | |
2200 | goto out; | |
9f107513 | 2201 | } |
8cf89e00 AL |
2202 | |
2203 | /* do we need to sync the file? */ | |
2204 | if (donttouch_stat(&vs->v9stat)) { | |
2205 | err = v9fs_do_fsync(s, vs->fidp->fd); | |
2206 | v9fs_wstat_post_fsync(s, vs, err); | |
2207 | return; | |
2208 | } | |
2209 | ||
2210 | if (vs->v9stat.mode != -1) { | |
2211 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
2212 | v9fs_wstat_post_lstat(s, vs, err); | |
2213 | return; | |
2214 | } | |
2215 | ||
2216 | v9fs_wstat_post_chmod(s, vs, err); | |
2217 | return; | |
2218 | ||
2219 | out: | |
2220 | v9fs_stat_free(&vs->v9stat); | |
2221 | complete_pdu(s, vs->pdu, err); | |
2222 | qemu_free(vs); | |
9f107513 AL |
2223 | } |
2224 | ||
2225 | typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); | |
2226 | ||
2227 | static pdu_handler_t *pdu_handlers[] = { | |
2228 | [P9_TVERSION] = v9fs_version, | |
2229 | [P9_TATTACH] = v9fs_attach, | |
2230 | [P9_TSTAT] = v9fs_stat, | |
2231 | [P9_TWALK] = v9fs_walk, | |
2232 | [P9_TCLUNK] = v9fs_clunk, | |
2233 | [P9_TOPEN] = v9fs_open, | |
2234 | [P9_TREAD] = v9fs_read, | |
2235 | #if 0 | |
2236 | [P9_TAUTH] = v9fs_auth, | |
2237 | #endif | |
2238 | [P9_TFLUSH] = v9fs_flush, | |
2239 | [P9_TCREATE] = v9fs_create, | |
2240 | [P9_TWRITE] = v9fs_write, | |
2241 | [P9_TWSTAT] = v9fs_wstat, | |
2242 | [P9_TREMOVE] = v9fs_remove, | |
2243 | }; | |
2244 | ||
2245 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) | |
2246 | { | |
2247 | pdu_handler_t *handler; | |
2248 | ||
2249 | if (debug_9p_pdu) { | |
2250 | pprint_pdu(pdu); | |
2251 | } | |
2252 | ||
2253 | BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); | |
2254 | ||
2255 | handler = pdu_handlers[pdu->id]; | |
2256 | BUG_ON(handler == NULL); | |
2257 | ||
2258 | handler(s, pdu); | |
2259 | } | |
2260 | ||
2261 | static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) | |
2262 | { | |
2263 | V9fsState *s = (V9fsState *)vdev; | |
2264 | V9fsPDU *pdu; | |
2265 | ssize_t len; | |
2266 | ||
2267 | while ((pdu = alloc_pdu(s)) && | |
2268 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
2269 | uint8_t *ptr; | |
2270 | ||
2271 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); | |
2272 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
2273 | ||
2274 | ptr = pdu->elem.out_sg[0].iov_base; | |
2275 | ||
2276 | memcpy(&pdu->size, ptr, 4); | |
2277 | pdu->id = ptr[4]; | |
2278 | memcpy(&pdu->tag, ptr + 5, 2); | |
2279 | ||
2280 | submit_pdu(s, pdu); | |
2281 | } | |
2282 | ||
2283 | free_pdu(s, pdu); | |
2284 | } | |
2285 | ||
2286 | static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features) | |
2287 | { | |
2288 | features |= 1 << VIRTIO_9P_MOUNT_TAG; | |
2289 | return features; | |
2290 | } | |
2291 | ||
2292 | static V9fsState *to_virtio_9p(VirtIODevice *vdev) | |
2293 | { | |
2294 | return (V9fsState *)vdev; | |
2295 | } | |
2296 | ||
2297 | static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) | |
2298 | { | |
2299 | struct virtio_9p_config *cfg; | |
2300 | V9fsState *s = to_virtio_9p(vdev); | |
2301 | ||
2302 | cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + | |
2303 | s->tag_len); | |
2304 | stw_raw(&cfg->tag_len, s->tag_len); | |
2305 | memcpy(cfg->tag, s->tag, s->tag_len); | |
2306 | memcpy(config, cfg, s->config_size); | |
2307 | qemu_free(cfg); | |
2308 | } | |
2309 | ||
2310 | VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) | |
2311 | { | |
2312 | V9fsState *s; | |
2313 | int i, len; | |
2314 | struct stat stat; | |
2315 | FsTypeEntry *fse; | |
2316 | ||
2317 | ||
2318 | s = (V9fsState *)virtio_common_init("virtio-9p", | |
2319 | VIRTIO_ID_9P, | |
2320 | sizeof(struct virtio_9p_config)+ | |
2321 | MAX_TAG_LEN, | |
2322 | sizeof(V9fsState)); | |
2323 | ||
2324 | /* initialize pdu allocator */ | |
2325 | QLIST_INIT(&s->free_list); | |
2326 | for (i = 0; i < (MAX_REQ - 1); i++) { | |
2327 | QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); | |
2328 | } | |
2329 | ||
2330 | s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); | |
2331 | ||
2332 | fse = get_fsdev_fsentry(conf->fsdev_id); | |
2333 | ||
2334 | if (!fse) { | |
2335 | /* We don't have a fsdev identified by fsdev_id */ | |
2336 | fprintf(stderr, "Virtio-9p device couldn't find fsdev " | |
2337 | "with the id %s\n", conf->fsdev_id); | |
2338 | exit(1); | |
2339 | } | |
2340 | ||
2341 | if (!fse->path || !conf->tag) { | |
2342 | /* we haven't specified a mount_tag or the path */ | |
2343 | fprintf(stderr, "fsdev with id %s needs path " | |
2344 | "and Virtio-9p device needs mount_tag arguments\n", | |
2345 | conf->fsdev_id); | |
2346 | exit(1); | |
2347 | } | |
2348 | ||
2349 | if (lstat(fse->path, &stat)) { | |
2350 | fprintf(stderr, "share path %s does not exist\n", fse->path); | |
2351 | exit(1); | |
2352 | } else if (!S_ISDIR(stat.st_mode)) { | |
2353 | fprintf(stderr, "share path %s is not a directory \n", fse->path); | |
2354 | exit(1); | |
2355 | } | |
2356 | ||
2357 | s->ctx.fs_root = qemu_strdup(fse->path); | |
2358 | len = strlen(conf->tag); | |
2359 | if (len > MAX_TAG_LEN) { | |
2360 | len = MAX_TAG_LEN; | |
2361 | } | |
2362 | /* s->tag is non-NULL terminated string */ | |
2363 | s->tag = qemu_malloc(len); | |
2364 | memcpy(s->tag, conf->tag, len); | |
2365 | s->tag_len = len; | |
2366 | s->ctx.uid = -1; | |
2367 | ||
2368 | s->ops = fse->ops; | |
2369 | s->vdev.get_features = virtio_9p_get_features; | |
2370 | s->config_size = sizeof(struct virtio_9p_config) + | |
2371 | s->tag_len; | |
2372 | s->vdev.get_config = virtio_9p_get_config; | |
2373 | ||
2374 | return &s->vdev; | |
2375 | } |