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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 | ||
a03f7874 AL |
106 | static void v9fs_string_init(V9fsString *str) |
107 | { | |
108 | str->data = NULL; | |
109 | str->size = 0; | |
110 | } | |
111 | ||
112 | static void v9fs_string_free(V9fsString *str) | |
113 | { | |
114 | qemu_free(str->data); | |
115 | str->data = NULL; | |
116 | str->size = 0; | |
117 | } | |
118 | ||
119 | static void v9fs_string_null(V9fsString *str) | |
120 | { | |
121 | v9fs_string_free(str); | |
122 | } | |
123 | ||
124 | static int number_to_string(void *arg, char type) | |
125 | { | |
126 | unsigned int ret = 0; | |
127 | ||
128 | switch (type) { | |
129 | case 'u': { | |
130 | unsigned int num = *(unsigned int *)arg; | |
131 | ||
132 | do { | |
133 | ret++; | |
134 | num = num/10; | |
135 | } while (num); | |
136 | break; | |
137 | } | |
138 | default: | |
139 | printf("Number_to_string: Unknown number format\n"); | |
140 | return -1; | |
141 | } | |
142 | ||
143 | return ret; | |
144 | } | |
145 | ||
146 | static int v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
147 | { | |
148 | va_list ap2; | |
149 | char *iter = (char *)fmt; | |
150 | int len = 0; | |
151 | int nr_args = 0; | |
152 | char *arg_char_ptr; | |
153 | unsigned int arg_uint; | |
154 | ||
155 | /* Find the number of %'s that denotes an argument */ | |
156 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
157 | nr_args++; | |
158 | iter++; | |
159 | } | |
160 | ||
161 | len = strlen(fmt) - 2*nr_args; | |
162 | ||
163 | if (!nr_args) { | |
164 | goto alloc_print; | |
165 | } | |
166 | ||
167 | va_copy(ap2, ap); | |
168 | ||
169 | iter = (char *)fmt; | |
170 | ||
171 | /* Now parse the format string */ | |
172 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
173 | iter++; | |
174 | switch (*iter) { | |
175 | case 'u': | |
176 | arg_uint = va_arg(ap2, unsigned int); | |
177 | len += number_to_string((void *)&arg_uint, 'u'); | |
178 | break; | |
179 | case 's': | |
180 | arg_char_ptr = va_arg(ap2, char *); | |
181 | len += strlen(arg_char_ptr); | |
182 | break; | |
183 | case 'c': | |
184 | len += 1; | |
185 | break; | |
186 | default: | |
187 | fprintf(stderr, | |
188 | "v9fs_string_alloc_printf:Incorrect format %c", *iter); | |
189 | return -1; | |
190 | } | |
191 | iter++; | |
192 | } | |
193 | ||
194 | alloc_print: | |
195 | *strp = qemu_malloc((len + 1) * sizeof(**strp)); | |
196 | ||
197 | return vsprintf(*strp, fmt, ap); | |
198 | } | |
199 | ||
200 | static void v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
201 | { | |
202 | va_list ap; | |
203 | int err; | |
204 | ||
205 | v9fs_string_free(str); | |
206 | ||
207 | va_start(ap, fmt); | |
208 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
209 | BUG_ON(err == -1); | |
210 | va_end(ap); | |
211 | ||
212 | str->size = err; | |
213 | } | |
214 | ||
215 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
216 | { | |
217 | v9fs_string_free(lhs); | |
218 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
219 | } | |
220 | ||
221 | static size_t v9fs_string_size(V9fsString *str) | |
222 | { | |
223 | return str->size; | |
224 | } | |
225 | ||
286d5652 AL |
226 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
227 | { | |
228 | V9fsFidState *f; | |
229 | ||
230 | for (f = s->fid_list; f; f = f->next) { | |
231 | if (f->fid == fid) { | |
232 | v9fs_do_setuid(s, f->uid); | |
233 | return f; | |
234 | } | |
235 | } | |
236 | ||
237 | return NULL; | |
238 | } | |
239 | ||
240 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
241 | { | |
242 | V9fsFidState *f; | |
243 | ||
244 | f = lookup_fid(s, fid); | |
245 | if (f) { | |
246 | return NULL; | |
247 | } | |
248 | ||
249 | f = qemu_mallocz(sizeof(V9fsFidState)); | |
250 | ||
251 | f->fid = fid; | |
252 | f->fd = -1; | |
253 | f->dir = NULL; | |
254 | ||
255 | f->next = s->fid_list; | |
256 | s->fid_list = f; | |
257 | ||
258 | return f; | |
259 | } | |
260 | ||
261 | static int free_fid(V9fsState *s, int32_t fid) | |
262 | { | |
263 | V9fsFidState **fidpp, *fidp; | |
264 | ||
265 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
266 | if ((*fidpp)->fid == fid) { | |
267 | break; | |
268 | } | |
269 | } | |
270 | ||
271 | if (*fidpp == NULL) { | |
272 | return -ENOENT; | |
273 | } | |
274 | ||
275 | fidp = *fidpp; | |
276 | *fidpp = fidp->next; | |
277 | ||
278 | if (fidp->fd != -1) { | |
279 | v9fs_do_close(s, fidp->fd); | |
280 | } | |
281 | if (fidp->dir) { | |
282 | v9fs_do_closedir(s, fidp->dir); | |
283 | } | |
284 | v9fs_string_free(&fidp->path); | |
285 | qemu_free(fidp); | |
286 | ||
287 | return 0; | |
288 | } | |
289 | ||
290 | #define P9_QID_TYPE_DIR 0x80 | |
291 | #define P9_QID_TYPE_SYMLINK 0x02 | |
292 | ||
293 | #define P9_STAT_MODE_DIR 0x80000000 | |
294 | #define P9_STAT_MODE_APPEND 0x40000000 | |
295 | #define P9_STAT_MODE_EXCL 0x20000000 | |
296 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
297 | #define P9_STAT_MODE_AUTH 0x08000000 | |
298 | #define P9_STAT_MODE_TMP 0x04000000 | |
299 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
300 | #define P9_STAT_MODE_LINK 0x01000000 | |
301 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
302 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
303 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
304 | #define P9_STAT_MODE_SETUID 0x00080000 | |
305 | #define P9_STAT_MODE_SETGID 0x00040000 | |
306 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
307 | ||
308 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
309 | P9_STAT_MODE_SYMLINK | \ | |
310 | P9_STAT_MODE_LINK | \ | |
311 | P9_STAT_MODE_DEVICE | \ | |
312 | P9_STAT_MODE_NAMED_PIPE | \ | |
313 | P9_STAT_MODE_SOCKET) | |
314 | ||
315 | /* This is the algorithm from ufs in spfs */ | |
316 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
317 | { | |
318 | size_t size; | |
319 | ||
320 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
321 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
322 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
323 | qidp->type = 0; | |
324 | if (S_ISDIR(stbuf->st_mode)) { | |
325 | qidp->type |= P9_QID_TYPE_DIR; | |
326 | } | |
327 | if (S_ISLNK(stbuf->st_mode)) { | |
328 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
329 | } | |
330 | } | |
331 | ||
332 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
333 | { | |
334 | struct stat stbuf; | |
335 | int err; | |
336 | ||
337 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
338 | if (err) { | |
339 | return err; | |
340 | } | |
341 | ||
342 | stat_to_qid(&stbuf, qidp); | |
343 | return 0; | |
344 | } | |
345 | ||
9f107513 AL |
346 | static V9fsPDU *alloc_pdu(V9fsState *s) |
347 | { | |
348 | V9fsPDU *pdu = NULL; | |
349 | ||
350 | if (!QLIST_EMPTY(&s->free_list)) { | |
351 | pdu = QLIST_FIRST(&s->free_list); | |
352 | QLIST_REMOVE(pdu, next); | |
353 | } | |
354 | return pdu; | |
355 | } | |
356 | ||
357 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
358 | { | |
359 | if (pdu) { | |
360 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
361 | } | |
362 | } | |
363 | ||
364 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
365 | size_t offset, size_t size, int pack) | |
366 | { | |
367 | int i = 0; | |
368 | size_t copied = 0; | |
369 | ||
370 | for (i = 0; size && i < sg_count; i++) { | |
371 | size_t len; | |
372 | if (offset >= sg[i].iov_len) { | |
373 | /* skip this sg */ | |
374 | offset -= sg[i].iov_len; | |
375 | continue; | |
376 | } else { | |
377 | len = MIN(sg[i].iov_len - offset, size); | |
378 | if (pack) { | |
379 | memcpy(sg[i].iov_base + offset, addr, len); | |
380 | } else { | |
381 | memcpy(addr, sg[i].iov_base + offset, len); | |
382 | } | |
383 | size -= len; | |
384 | copied += len; | |
385 | addr += len; | |
386 | if (size) { | |
387 | offset = 0; | |
388 | continue; | |
389 | } | |
390 | } | |
391 | } | |
392 | ||
393 | return copied; | |
394 | } | |
395 | ||
405a549a AL |
396 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
397 | { | |
398 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
399 | offset, size, 0); | |
400 | } | |
401 | ||
402 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
403 | size_t size) | |
404 | { | |
405 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
406 | offset, size, 1); | |
407 | } | |
408 | ||
409 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
410 | { | |
411 | size_t pos = 0; | |
412 | int i, j; | |
413 | struct iovec *src_sg; | |
414 | unsigned int num; | |
415 | ||
416 | if (rx) { | |
417 | src_sg = pdu->elem.in_sg; | |
418 | num = pdu->elem.in_num; | |
419 | } else { | |
420 | src_sg = pdu->elem.out_sg; | |
421 | num = pdu->elem.out_num; | |
422 | } | |
423 | ||
424 | j = 0; | |
425 | for (i = 0; i < num; i++) { | |
426 | if (offset <= pos) { | |
427 | sg[j].iov_base = src_sg[i].iov_base; | |
428 | sg[j].iov_len = src_sg[i].iov_len; | |
429 | j++; | |
430 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
431 | sg[j].iov_base = src_sg[i].iov_base; | |
432 | sg[j].iov_len = src_sg[i].iov_len; | |
433 | sg[j].iov_base += (offset - pos); | |
434 | sg[j].iov_len -= (offset - pos); | |
435 | j++; | |
436 | } | |
437 | pos += src_sg[i].iov_len; | |
438 | } | |
439 | ||
440 | return j; | |
441 | } | |
442 | ||
443 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
444 | { | |
445 | size_t old_offset = offset; | |
446 | va_list ap; | |
447 | int i; | |
448 | ||
449 | va_start(ap, fmt); | |
450 | for (i = 0; fmt[i]; i++) { | |
451 | switch (fmt[i]) { | |
452 | case 'b': { | |
453 | uint8_t *valp = va_arg(ap, uint8_t *); | |
454 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
455 | break; | |
456 | } | |
457 | case 'w': { | |
458 | uint16_t val, *valp; | |
459 | valp = va_arg(ap, uint16_t *); | |
460 | val = le16_to_cpupu(valp); | |
461 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
462 | *valp = val; | |
463 | break; | |
464 | } | |
465 | case 'd': { | |
466 | uint32_t val, *valp; | |
467 | valp = va_arg(ap, uint32_t *); | |
468 | val = le32_to_cpupu(valp); | |
469 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
470 | *valp = val; | |
471 | break; | |
472 | } | |
473 | case 'q': { | |
474 | uint64_t val, *valp; | |
475 | valp = va_arg(ap, uint64_t *); | |
476 | val = le64_to_cpup(valp); | |
477 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
478 | *valp = val; | |
479 | break; | |
480 | } | |
481 | case 'v': { | |
482 | struct iovec *iov = va_arg(ap, struct iovec *); | |
483 | int *iovcnt = va_arg(ap, int *); | |
484 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
485 | break; | |
486 | } | |
487 | case 's': { | |
488 | V9fsString *str = va_arg(ap, V9fsString *); | |
489 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
490 | /* FIXME: sanity check str->size */ | |
491 | str->data = qemu_malloc(str->size + 1); | |
492 | offset += pdu_unpack(str->data, pdu, offset, str->size); | |
493 | str->data[str->size] = 0; | |
494 | break; | |
495 | } | |
496 | case 'Q': { | |
497 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
498 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
499 | &qidp->type, &qidp->version, &qidp->path); | |
500 | break; | |
501 | } | |
502 | case 'S': { | |
503 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
504 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
505 | &statp->size, &statp->type, &statp->dev, | |
506 | &statp->qid, &statp->mode, &statp->atime, | |
507 | &statp->mtime, &statp->length, | |
508 | &statp->name, &statp->uid, &statp->gid, | |
509 | &statp->muid, &statp->extension, | |
510 | &statp->n_uid, &statp->n_gid, | |
511 | &statp->n_muid); | |
512 | break; | |
513 | } | |
514 | default: | |
515 | break; | |
516 | } | |
517 | } | |
518 | ||
519 | va_end(ap); | |
520 | ||
521 | return offset - old_offset; | |
522 | } | |
523 | ||
524 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
525 | { | |
526 | size_t old_offset = offset; | |
527 | va_list ap; | |
528 | int i; | |
529 | ||
530 | va_start(ap, fmt); | |
531 | for (i = 0; fmt[i]; i++) { | |
532 | switch (fmt[i]) { | |
533 | case 'b': { | |
534 | uint8_t val = va_arg(ap, int); | |
535 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
536 | break; | |
537 | } | |
538 | case 'w': { | |
539 | uint16_t val; | |
540 | cpu_to_le16w(&val, va_arg(ap, int)); | |
541 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
542 | break; | |
543 | } | |
544 | case 'd': { | |
545 | uint32_t val; | |
546 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
547 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
548 | break; | |
549 | } | |
550 | case 'q': { | |
551 | uint64_t val; | |
552 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
553 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
554 | break; | |
555 | } | |
556 | case 'v': { | |
557 | struct iovec *iov = va_arg(ap, struct iovec *); | |
558 | int *iovcnt = va_arg(ap, int *); | |
559 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
560 | break; | |
561 | } | |
562 | case 's': { | |
563 | V9fsString *str = va_arg(ap, V9fsString *); | |
564 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
565 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
566 | break; | |
567 | } | |
568 | case 'Q': { | |
569 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
570 | offset += pdu_marshal(pdu, offset, "bdq", | |
571 | qidp->type, qidp->version, qidp->path); | |
572 | break; | |
573 | } | |
574 | case 'S': { | |
575 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
576 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
577 | statp->size, statp->type, statp->dev, | |
578 | &statp->qid, statp->mode, statp->atime, | |
579 | statp->mtime, statp->length, &statp->name, | |
580 | &statp->uid, &statp->gid, &statp->muid, | |
581 | &statp->extension, statp->n_uid, | |
582 | statp->n_gid, statp->n_muid); | |
583 | break; | |
584 | } | |
585 | default: | |
586 | break; | |
587 | } | |
588 | } | |
589 | va_end(ap); | |
590 | ||
591 | return offset - old_offset; | |
592 | } | |
593 | ||
594 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
595 | { | |
596 | int8_t id = pdu->id + 1; /* Response */ | |
597 | ||
598 | if (len < 0) { | |
599 | V9fsString str; | |
600 | int err = -len; | |
601 | ||
602 | str.data = strerror(err); | |
603 | str.size = strlen(str.data); | |
604 | ||
605 | len = 7; | |
606 | len += pdu_marshal(pdu, len, "s", &str); | |
607 | if (dotu) { | |
608 | len += pdu_marshal(pdu, len, "d", err); | |
609 | } | |
610 | ||
611 | id = P9_RERROR; | |
612 | } | |
613 | ||
614 | /* fill out the header */ | |
615 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
616 | ||
617 | /* keep these in sync */ | |
618 | pdu->size = len; | |
619 | pdu->id = id; | |
620 | ||
621 | /* push onto queue and notify */ | |
622 | virtqueue_push(s->vq, &pdu->elem, len); | |
623 | ||
624 | /* FIXME: we should batch these completions */ | |
625 | virtio_notify(&s->vdev, s->vq); | |
626 | ||
627 | free_pdu(s, pdu); | |
628 | } | |
629 | ||
bb9e3216 AL |
630 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
631 | { | |
632 | mode_t ret; | |
633 | ||
634 | ret = mode & 0777; | |
635 | if (mode & P9_STAT_MODE_DIR) { | |
636 | ret |= S_IFDIR; | |
637 | } | |
638 | ||
639 | if (dotu) { | |
640 | if (mode & P9_STAT_MODE_SYMLINK) { | |
641 | ret |= S_IFLNK; | |
642 | } | |
643 | if (mode & P9_STAT_MODE_SOCKET) { | |
644 | ret |= S_IFSOCK; | |
645 | } | |
646 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
647 | ret |= S_IFIFO; | |
648 | } | |
649 | if (mode & P9_STAT_MODE_DEVICE) { | |
650 | if (extension && extension->data[0] == 'c') { | |
651 | ret |= S_IFCHR; | |
652 | } else { | |
653 | ret |= S_IFBLK; | |
654 | } | |
655 | } | |
656 | } | |
657 | ||
658 | if (!(ret&~0777)) { | |
659 | ret |= S_IFREG; | |
660 | } | |
661 | ||
662 | if (mode & P9_STAT_MODE_SETUID) { | |
663 | ret |= S_ISUID; | |
664 | } | |
665 | if (mode & P9_STAT_MODE_SETGID) { | |
666 | ret |= S_ISGID; | |
667 | } | |
668 | if (mode & P9_STAT_MODE_SETVTX) { | |
669 | ret |= S_ISVTX; | |
670 | } | |
671 | ||
672 | return ret; | |
673 | } | |
674 | ||
675 | static int donttouch_stat(V9fsStat *stat) | |
676 | { | |
677 | if (stat->type == -1 && | |
678 | stat->dev == -1 && | |
679 | stat->qid.type == -1 && | |
680 | stat->qid.version == -1 && | |
681 | stat->qid.path == -1 && | |
682 | stat->mode == -1 && | |
683 | stat->atime == -1 && | |
684 | stat->mtime == -1 && | |
685 | stat->length == -1 && | |
686 | !stat->name.size && | |
687 | !stat->uid.size && | |
688 | !stat->gid.size && | |
689 | !stat->muid.size && | |
690 | stat->n_uid == -1 && | |
691 | stat->n_gid == -1 && | |
692 | stat->n_muid == -1) { | |
693 | return 1; | |
694 | } | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | static void v9fs_stat_free(V9fsStat *stat) | |
700 | { | |
701 | v9fs_string_free(&stat->name); | |
702 | v9fs_string_free(&stat->uid); | |
703 | v9fs_string_free(&stat->gid); | |
704 | v9fs_string_free(&stat->muid); | |
705 | v9fs_string_free(&stat->extension); | |
706 | } | |
707 | ||
708 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
709 | { | |
710 | uint32_t mode; | |
711 | ||
712 | mode = stbuf->st_mode & 0777; | |
713 | if (S_ISDIR(stbuf->st_mode)) { | |
714 | mode |= P9_STAT_MODE_DIR; | |
715 | } | |
716 | ||
717 | if (dotu) { | |
718 | if (S_ISLNK(stbuf->st_mode)) { | |
719 | mode |= P9_STAT_MODE_SYMLINK; | |
720 | } | |
721 | ||
722 | if (S_ISSOCK(stbuf->st_mode)) { | |
723 | mode |= P9_STAT_MODE_SOCKET; | |
724 | } | |
725 | ||
726 | if (S_ISFIFO(stbuf->st_mode)) { | |
727 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
728 | } | |
729 | ||
730 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { | |
731 | mode |= P9_STAT_MODE_DEVICE; | |
732 | } | |
733 | ||
734 | if (stbuf->st_mode & S_ISUID) { | |
735 | mode |= P9_STAT_MODE_SETUID; | |
736 | } | |
737 | ||
738 | if (stbuf->st_mode & S_ISGID) { | |
739 | mode |= P9_STAT_MODE_SETGID; | |
740 | } | |
741 | ||
742 | if (stbuf->st_mode & S_ISVTX) { | |
743 | mode |= P9_STAT_MODE_SETVTX; | |
744 | } | |
745 | } | |
746 | ||
747 | return mode; | |
748 | } | |
749 | ||
750 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
751 | const struct stat *stbuf, | |
752 | V9fsStat *v9stat) | |
753 | { | |
754 | int err; | |
755 | const char *str; | |
756 | ||
757 | memset(v9stat, 0, sizeof(*v9stat)); | |
758 | ||
759 | stat_to_qid(stbuf, &v9stat->qid); | |
760 | v9stat->mode = stat_to_v9mode(stbuf); | |
761 | v9stat->atime = stbuf->st_atime; | |
762 | v9stat->mtime = stbuf->st_mtime; | |
763 | v9stat->length = stbuf->st_size; | |
764 | ||
765 | v9fs_string_null(&v9stat->uid); | |
766 | v9fs_string_null(&v9stat->gid); | |
767 | v9fs_string_null(&v9stat->muid); | |
768 | ||
769 | if (dotu) { | |
770 | v9stat->n_uid = stbuf->st_uid; | |
771 | v9stat->n_gid = stbuf->st_gid; | |
772 | v9stat->n_muid = 0; | |
773 | ||
774 | v9fs_string_null(&v9stat->extension); | |
775 | ||
776 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { | |
777 | err = v9fs_do_readlink(s, name, &v9stat->extension); | |
778 | if (err == -1) { | |
779 | err = -errno; | |
780 | return err; | |
781 | } | |
782 | v9stat->extension.data[err] = 0; | |
783 | v9stat->extension.size = err; | |
784 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { | |
785 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
786 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
787 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
788 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
789 | v9fs_string_sprintf(&v9stat->extension, "%s %u", | |
790 | "HARDLINKCOUNT", stbuf->st_nlink); | |
791 | } | |
792 | } | |
793 | ||
794 | str = strrchr(name->data, '/'); | |
795 | if (str) { | |
796 | str += 1; | |
797 | } else { | |
798 | str = name->data; | |
799 | } | |
800 | ||
801 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
802 | ||
803 | v9stat->size = 61 + | |
804 | v9fs_string_size(&v9stat->name) + | |
805 | v9fs_string_size(&v9stat->uid) + | |
806 | v9fs_string_size(&v9stat->gid) + | |
807 | v9fs_string_size(&v9stat->muid) + | |
808 | v9fs_string_size(&v9stat->extension); | |
809 | return 0; | |
810 | } | |
811 | ||
1f5a89bf AL |
812 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
813 | { | |
814 | while (len && *iovcnt) { | |
815 | if (len < sg->iov_len) { | |
816 | sg->iov_len -= len; | |
817 | sg->iov_base += len; | |
818 | len = 0; | |
819 | } else { | |
820 | len -= sg->iov_len; | |
821 | sg++; | |
822 | *iovcnt -= 1; | |
823 | } | |
824 | } | |
825 | ||
826 | return sg; | |
827 | } | |
828 | ||
829 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
830 | { | |
831 | int i; | |
832 | int total = 0; | |
833 | ||
834 | for (i = 0; i < *cnt; i++) { | |
835 | if ((total + sg[i].iov_len) > cap) { | |
836 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
837 | i++; | |
838 | break; | |
839 | } | |
840 | total += sg[i].iov_len; | |
841 | } | |
842 | ||
843 | *cnt = i; | |
844 | ||
845 | return sg; | |
846 | } | |
847 | ||
848 | static void print_sg(struct iovec *sg, int cnt) | |
849 | { | |
850 | int i; | |
851 | ||
852 | printf("sg[%d]: {", cnt); | |
853 | for (i = 0; i < cnt; i++) { | |
854 | if (i) { | |
855 | printf(", "); | |
856 | } | |
857 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
858 | } | |
859 | printf("}\n"); | |
860 | } | |
861 | ||
405a549a AL |
862 | static void v9fs_dummy(V9fsState *s, V9fsPDU *pdu) |
863 | { | |
864 | /* Note: The following have been added to prevent GCC from complaining | |
865 | * They will be removed in the subsequent patches */ | |
866 | (void)pdu_unmarshal; | |
867 | (void) complete_pdu; | |
a03f7874 AL |
868 | (void) v9fs_string_init; |
869 | (void) v9fs_string_free; | |
870 | (void) v9fs_string_null; | |
871 | (void) v9fs_string_sprintf; | |
872 | (void) v9fs_string_copy; | |
873 | (void) v9fs_string_size; | |
131dcb25 AL |
874 | (void) v9fs_do_lstat; |
875 | (void) v9fs_do_setuid; | |
876 | (void) v9fs_do_readlink; | |
877 | (void) v9fs_do_close; | |
878 | (void) v9fs_do_closedir; | |
286d5652 AL |
879 | (void) alloc_fid; |
880 | (void) free_fid; | |
881 | (void) fid_to_qid; | |
bb9e3216 AL |
882 | (void) v9mode_to_mode; |
883 | (void) donttouch_stat; | |
884 | (void) v9fs_stat_free; | |
885 | (void) stat_to_v9stat; | |
1f5a89bf AL |
886 | (void) adjust_sg; |
887 | (void) cap_sg; | |
888 | (void) print_sg; | |
405a549a | 889 | } |
131dcb25 | 890 | |
9f107513 AL |
891 | static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
892 | { | |
92c1ad03 AL |
893 | int32_t msize; |
894 | V9fsString version; | |
895 | size_t offset = 7; | |
896 | ||
897 | pdu_unmarshal(pdu, offset, "ds", &msize, &version); | |
898 | ||
899 | if (strcmp(version.data, "9P2000.u")) { | |
900 | v9fs_string_sprintf(&version, "unknown"); | |
9f107513 | 901 | } |
92c1ad03 AL |
902 | |
903 | offset += pdu_marshal(pdu, offset, "ds", msize, &version); | |
904 | complete_pdu(s, pdu, offset); | |
905 | ||
906 | v9fs_string_free(&version); | |
9f107513 AL |
907 | } |
908 | ||
909 | static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) | |
910 | { | |
955efc47 AL |
911 | int32_t fid, afid, n_uname; |
912 | V9fsString uname, aname; | |
913 | V9fsFidState *fidp; | |
914 | V9fsQID qid; | |
915 | size_t offset = 7; | |
916 | ssize_t err; | |
917 | ||
918 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
919 | ||
920 | fidp = alloc_fid(s, fid); | |
921 | if (fidp == NULL) { | |
922 | err = -EINVAL; | |
923 | goto out; | |
9f107513 | 924 | } |
955efc47 AL |
925 | |
926 | fidp->uid = n_uname; | |
927 | ||
928 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
929 | err = fid_to_qid(s, fidp, &qid); | |
930 | if (err) { | |
931 | err = -EINVAL; | |
932 | free_fid(s, fid); | |
933 | goto out; | |
934 | } | |
935 | ||
936 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
937 | ||
938 | err = offset; | |
939 | out: | |
940 | complete_pdu(s, pdu, err); | |
941 | v9fs_string_free(&uname); | |
942 | v9fs_string_free(&aname); | |
9f107513 AL |
943 | } |
944 | ||
4da7d3fa AL |
945 | typedef struct V9fsStatState { |
946 | V9fsPDU *pdu; | |
947 | size_t offset; | |
948 | V9fsStat v9stat; | |
949 | V9fsFidState *fidp; | |
950 | struct stat stbuf; | |
951 | } V9fsStatState; | |
952 | ||
953 | static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) | |
954 | { | |
955 | if (err == -1) { | |
956 | err = -errno; | |
957 | goto out; | |
958 | } | |
959 | ||
960 | err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); | |
961 | if (err) { | |
962 | goto out; | |
963 | } | |
964 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); | |
965 | err = vs->offset; | |
966 | ||
967 | out: | |
968 | complete_pdu(s, vs->pdu, err); | |
969 | v9fs_stat_free(&vs->v9stat); | |
970 | qemu_free(vs); | |
971 | } | |
972 | ||
9f107513 AL |
973 | static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
974 | { | |
4da7d3fa AL |
975 | int32_t fid; |
976 | V9fsStatState *vs; | |
977 | ssize_t err = 0; | |
978 | ||
979 | vs = qemu_malloc(sizeof(*vs)); | |
980 | vs->pdu = pdu; | |
981 | vs->offset = 7; | |
982 | ||
983 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
984 | ||
985 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
986 | ||
987 | vs->fidp = lookup_fid(s, fid); | |
988 | if (vs->fidp == NULL) { | |
989 | err = -ENOENT; | |
990 | goto out; | |
9f107513 | 991 | } |
4da7d3fa AL |
992 | |
993 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
994 | v9fs_stat_post_lstat(s, vs, err); | |
995 | return; | |
996 | ||
997 | out: | |
998 | complete_pdu(s, vs->pdu, err); | |
999 | v9fs_stat_free(&vs->v9stat); | |
1000 | qemu_free(vs); | |
9f107513 AL |
1001 | } |
1002 | ||
ff5e54c9 AL |
1003 | typedef struct V9fsWalkState { |
1004 | V9fsPDU *pdu; | |
1005 | size_t offset; | |
1006 | int16_t nwnames; | |
1007 | int name_idx; | |
1008 | V9fsQID *qids; | |
1009 | V9fsFidState *fidp; | |
1010 | V9fsFidState *newfidp; | |
1011 | V9fsString path; | |
1012 | V9fsString *wnames; | |
1013 | struct stat stbuf; | |
1014 | } V9fsWalkState; | |
1015 | ||
1016 | static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) | |
1017 | { | |
1018 | complete_pdu(s, vs->pdu, err); | |
1019 | ||
1020 | if (vs->nwnames) { | |
1021 | for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { | |
1022 | v9fs_string_free(&vs->wnames[vs->name_idx]); | |
1023 | } | |
1024 | ||
1025 | qemu_free(vs->wnames); | |
1026 | qemu_free(vs->qids); | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | static void v9fs_walk_marshal(V9fsWalkState *vs) | |
1031 | { | |
1032 | int i; | |
1033 | vs->offset = 7; | |
1034 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames); | |
1035 | ||
1036 | for (i = 0; i < vs->nwnames; i++) { | |
1037 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]); | |
1038 | } | |
1039 | } | |
1040 | ||
1041 | static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1042 | int err) | |
1043 | { | |
1044 | if (err == -1) { | |
1045 | free_fid(s, vs->newfidp->fid); | |
1046 | v9fs_string_free(&vs->path); | |
1047 | err = -ENOENT; | |
1048 | goto out; | |
1049 | } | |
1050 | ||
1051 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1052 | ||
1053 | vs->name_idx++; | |
1054 | if (vs->name_idx < vs->nwnames) { | |
1055 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1056 | vs->wnames[vs->name_idx].data); | |
1057 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1058 | ||
1059 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1060 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1061 | return; | |
1062 | } | |
1063 | ||
1064 | v9fs_string_free(&vs->path); | |
1065 | v9fs_walk_marshal(vs); | |
1066 | err = vs->offset; | |
1067 | out: | |
1068 | v9fs_walk_complete(s, vs, err); | |
1069 | } | |
1070 | ||
1071 | static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1072 | int err) | |
1073 | { | |
1074 | if (err == -1) { | |
1075 | v9fs_string_free(&vs->path); | |
1076 | err = -ENOENT; | |
1077 | goto out; | |
1078 | } | |
1079 | ||
1080 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1081 | vs->name_idx++; | |
1082 | if (vs->name_idx < vs->nwnames) { | |
1083 | ||
1084 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1085 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1086 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1087 | ||
1088 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1089 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1090 | return; | |
1091 | } | |
1092 | ||
1093 | v9fs_string_free(&vs->path); | |
1094 | v9fs_walk_marshal(vs); | |
1095 | err = vs->offset; | |
1096 | out: | |
1097 | v9fs_walk_complete(s, vs, err); | |
1098 | } | |
1099 | ||
9f107513 AL |
1100 | static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1101 | { | |
ff5e54c9 AL |
1102 | int32_t fid, newfid; |
1103 | V9fsWalkState *vs; | |
1104 | int err = 0; | |
1105 | int i; | |
1106 | ||
1107 | vs = qemu_malloc(sizeof(*vs)); | |
1108 | vs->pdu = pdu; | |
1109 | vs->wnames = NULL; | |
1110 | vs->qids = NULL; | |
1111 | vs->offset = 7; | |
1112 | ||
1113 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid, | |
1114 | &newfid, &vs->nwnames); | |
1115 | ||
1116 | if (vs->nwnames) { | |
1117 | vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); | |
1118 | ||
1119 | vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); | |
1120 | ||
1121 | for (i = 0; i < vs->nwnames; i++) { | |
1122 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s", | |
1123 | &vs->wnames[i]); | |
1124 | } | |
1125 | } | |
1126 | ||
1127 | vs->fidp = lookup_fid(s, fid); | |
1128 | if (vs->fidp == NULL) { | |
1129 | err = -ENOENT; | |
1130 | goto out; | |
1131 | } | |
1132 | ||
1133 | /* FIXME: is this really valid? */ | |
1134 | if (fid == newfid) { | |
1135 | ||
1136 | BUG_ON(vs->fidp->fd != -1); | |
1137 | BUG_ON(vs->fidp->dir); | |
1138 | v9fs_string_init(&vs->path); | |
1139 | vs->name_idx = 0; | |
1140 | ||
1141 | if (vs->name_idx < vs->nwnames) { | |
1142 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1143 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1144 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1145 | ||
1146 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1147 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1148 | return; | |
1149 | } | |
1150 | } else { | |
1151 | vs->newfidp = alloc_fid(s, newfid); | |
1152 | if (vs->newfidp == NULL) { | |
1153 | err = -EINVAL; | |
1154 | goto out; | |
1155 | } | |
1156 | ||
1157 | vs->newfidp->uid = vs->fidp->uid; | |
1158 | v9fs_string_init(&vs->path); | |
1159 | vs->name_idx = 0; | |
1160 | v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); | |
1161 | ||
1162 | if (vs->name_idx < vs->nwnames) { | |
1163 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1164 | vs->wnames[vs->name_idx].data); | |
1165 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1166 | ||
1167 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1168 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1169 | return; | |
1170 | } | |
9f107513 | 1171 | } |
ff5e54c9 AL |
1172 | |
1173 | v9fs_walk_marshal(vs); | |
1174 | err = vs->offset; | |
1175 | out: | |
1176 | v9fs_walk_complete(s, vs, err); | |
9f107513 AL |
1177 | } |
1178 | ||
a6568fe2 AL |
1179 | typedef struct V9fsOpenState { |
1180 | V9fsPDU *pdu; | |
1181 | size_t offset; | |
1182 | int8_t mode; | |
1183 | V9fsFidState *fidp; | |
1184 | V9fsQID qid; | |
1185 | struct stat stbuf; | |
1186 | ||
1187 | } V9fsOpenState; | |
1188 | ||
1189 | enum { | |
1190 | Oread = 0x00, | |
1191 | Owrite = 0x01, | |
1192 | Ordwr = 0x02, | |
1193 | Oexec = 0x03, | |
1194 | Oexcl = 0x04, | |
1195 | Otrunc = 0x10, | |
1196 | Orexec = 0x20, | |
1197 | Orclose = 0x40, | |
1198 | Oappend = 0x80, | |
1199 | }; | |
1200 | ||
1201 | static int omode_to_uflags(int8_t mode) | |
9f107513 | 1202 | { |
a6568fe2 AL |
1203 | int ret = 0; |
1204 | ||
1205 | switch (mode & 3) { | |
1206 | case Oread: | |
1207 | ret = O_RDONLY; | |
1208 | break; | |
1209 | case Ordwr: | |
1210 | ret = O_RDWR; | |
1211 | break; | |
1212 | case Owrite: | |
1213 | ret = O_WRONLY; | |
1214 | break; | |
1215 | case Oexec: | |
1216 | ret = O_RDONLY; | |
1217 | break; | |
1218 | } | |
1219 | ||
1220 | if (mode & Otrunc) { | |
1221 | ret |= O_TRUNC; | |
1222 | } | |
1223 | ||
1224 | if (mode & Oappend) { | |
1225 | ret |= O_APPEND; | |
9f107513 | 1226 | } |
a6568fe2 AL |
1227 | |
1228 | if (mode & Oexcl) { | |
1229 | ret |= O_EXCL; | |
1230 | } | |
1231 | ||
1232 | return ret; | |
1233 | } | |
1234 | ||
1235 | static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) | |
1236 | { | |
1237 | if (vs->fidp->dir == NULL) { | |
1238 | err = -errno; | |
1239 | goto out; | |
1240 | } | |
1241 | ||
1242 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1243 | err = vs->offset; | |
1244 | out: | |
1245 | complete_pdu(s, vs->pdu, err); | |
1246 | qemu_free(vs); | |
1247 | ||
1248 | } | |
1249 | ||
1250 | static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) | |
1251 | { | |
1252 | if (vs->fidp->fd == -1) { | |
1253 | err = -errno; | |
1254 | goto out; | |
1255 | } | |
1256 | ||
1257 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); | |
1258 | err = vs->offset; | |
1259 | out: | |
1260 | complete_pdu(s, vs->pdu, err); | |
1261 | qemu_free(vs); | |
1262 | } | |
1263 | ||
1264 | static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) | |
1265 | { | |
1266 | if (err) { | |
1267 | err = -errno; | |
1268 | goto out; | |
1269 | } | |
1270 | ||
1271 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1272 | ||
1273 | if (S_ISDIR(vs->stbuf.st_mode)) { | |
1274 | vs->fidp->dir = v9fs_do_opendir(s, &vs->fidp->path); | |
1275 | v9fs_open_post_opendir(s, vs, err); | |
1276 | } else { | |
1277 | vs->fidp->fd = v9fs_do_open(s, &vs->fidp->path, | |
1278 | omode_to_uflags(vs->mode)); | |
1279 | v9fs_open_post_open(s, vs, err); | |
1280 | } | |
1281 | return; | |
1282 | out: | |
1283 | complete_pdu(s, vs->pdu, err); | |
1284 | qemu_free(vs); | |
9f107513 AL |
1285 | } |
1286 | ||
1287 | static void v9fs_open(V9fsState *s, V9fsPDU *pdu) | |
a6568fe2 AL |
1288 | { |
1289 | int32_t fid; | |
1290 | V9fsOpenState *vs; | |
1291 | ssize_t err = 0; | |
1292 | ||
1293 | ||
1294 | vs = qemu_malloc(sizeof(*vs)); | |
1295 | vs->pdu = pdu; | |
1296 | vs->offset = 7; | |
1297 | ||
1298 | pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode); | |
1299 | ||
1300 | vs->fidp = lookup_fid(s, fid); | |
1301 | if (vs->fidp == NULL) { | |
1302 | err = -ENOENT; | |
1303 | goto out; | |
1304 | } | |
1305 | ||
1306 | BUG_ON(vs->fidp->fd != -1); | |
1307 | BUG_ON(vs->fidp->dir); | |
1308 | ||
1309 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1310 | ||
1311 | v9fs_open_post_lstat(s, vs, err); | |
1312 | return; | |
1313 | out: | |
1314 | complete_pdu(s, pdu, err); | |
1315 | qemu_free(vs); | |
1316 | } | |
1317 | ||
1318 | static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) | |
1319 | { | |
bbd5697b AL |
1320 | int32_t fid; |
1321 | size_t offset = 7; | |
1322 | int err; | |
1323 | ||
1324 | pdu_unmarshal(pdu, offset, "d", &fid); | |
1325 | ||
1326 | err = free_fid(s, fid); | |
1327 | if (err < 0) { | |
1328 | goto out; | |
a6568fe2 | 1329 | } |
bbd5697b AL |
1330 | |
1331 | offset = 7; | |
1332 | err = offset; | |
1333 | out: | |
1334 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1335 | } |
1336 | ||
a9231555 AL |
1337 | typedef struct V9fsReadState { |
1338 | V9fsPDU *pdu; | |
1339 | size_t offset; | |
1340 | int32_t count; | |
1341 | int32_t total; | |
1342 | int64_t off; | |
1343 | V9fsFidState *fidp; | |
1344 | struct iovec iov[128]; /* FIXME: bad, bad, bad */ | |
1345 | struct iovec *sg; | |
1346 | off_t dir_pos; | |
1347 | struct dirent *dent; | |
1348 | struct stat stbuf; | |
1349 | V9fsString name; | |
1350 | V9fsStat v9stat; | |
1351 | int32_t len; | |
1352 | int32_t cnt; | |
1353 | int32_t max_count; | |
1354 | } V9fsReadState; | |
1355 | ||
1356 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); | |
1357 | ||
1358 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1359 | { | |
1360 | if (err) { | |
1361 | goto out; | |
1362 | } | |
1363 | v9fs_stat_free(&vs->v9stat); | |
1364 | v9fs_string_free(&vs->name); | |
1365 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1366 | vs->offset += vs->count; | |
1367 | err = vs->offset; | |
1368 | out: | |
1369 | complete_pdu(s, vs->pdu, err); | |
1370 | qemu_free(vs); | |
1371 | return; | |
1372 | } | |
1373 | ||
1374 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1375 | ssize_t err) | |
1376 | { | |
1377 | if (err) { | |
1378 | err = -errno; | |
1379 | goto out; | |
1380 | } | |
1381 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1382 | if (err) { | |
1383 | goto out; | |
1384 | } | |
1385 | ||
1386 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1387 | &vs->v9stat); | |
1388 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1389 | ((vs->count + vs->len) > vs->max_count)) { | |
1390 | v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); | |
1391 | v9fs_read_post_seekdir(s, vs, err); | |
1392 | return; | |
1393 | } | |
1394 | vs->count += vs->len; | |
1395 | v9fs_stat_free(&vs->v9stat); | |
1396 | v9fs_string_free(&vs->name); | |
1397 | vs->dir_pos = vs->dent->d_off; | |
1398 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
1399 | v9fs_read_post_readdir(s, vs, err); | |
1400 | return; | |
1401 | out: | |
1402 | v9fs_do_seekdir(s, vs->fidp->dir, vs->dir_pos); | |
1403 | v9fs_read_post_seekdir(s, vs, err); | |
1404 | return; | |
1405 | ||
1406 | } | |
1407 | ||
1408 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1409 | { | |
1410 | if (vs->dent) { | |
1411 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1412 | v9fs_string_init(&vs->name); | |
1413 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1414 | vs->dent->d_name); | |
1415 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1416 | v9fs_read_post_dir_lstat(s, vs, err); | |
1417 | return; | |
1418 | } | |
1419 | ||
1420 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1421 | vs->offset += vs->count; | |
1422 | err = vs->offset; | |
1423 | complete_pdu(s, vs->pdu, err); | |
1424 | qemu_free(vs); | |
1425 | return; | |
1426 | } | |
1427 | ||
1428 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1429 | { | |
1430 | vs->dent = v9fs_do_readdir(s, vs->fidp->dir); | |
1431 | v9fs_read_post_readdir(s, vs, err); | |
1432 | return; | |
1433 | } | |
1434 | ||
1435 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1436 | ssize_t err) | |
1437 | { | |
1438 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->dir); | |
1439 | v9fs_read_post_telldir(s, vs, err); | |
1440 | return; | |
1441 | } | |
1442 | ||
1443 | static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1444 | { | |
1445 | if (err < 0) { | |
1446 | /* IO error return the error */ | |
1447 | err = -errno; | |
1448 | goto out; | |
1449 | } | |
1450 | vs->total += vs->len; | |
1451 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1452 | if (vs->total < vs->count && vs->len > 0) { | |
1453 | do { | |
1454 | if (0) { | |
1455 | print_sg(vs->sg, vs->cnt); | |
1456 | } | |
1457 | vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1458 | } while (vs->len == -1 && errno == EINTR); | |
1459 | if (vs->len == -1) { | |
1460 | err = -errno; | |
1461 | } | |
1462 | v9fs_read_post_readv(s, vs, err); | |
1463 | return; | |
1464 | } | |
1465 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1466 | vs->offset += vs->count; | |
1467 | err = vs->offset; | |
1468 | ||
1469 | out: | |
1470 | complete_pdu(s, vs->pdu, err); | |
1471 | qemu_free(vs); | |
1472 | } | |
1473 | ||
1474 | static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1475 | { | |
1476 | if (err == -1) { | |
1477 | err = -errno; | |
1478 | goto out; | |
1479 | } | |
1480 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
1481 | ||
1482 | if (vs->total < vs->count) { | |
1483 | do { | |
1484 | if (0) { | |
1485 | print_sg(vs->sg, vs->cnt); | |
1486 | } | |
1487 | vs->len = v9fs_do_readv(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1488 | } while (vs->len == -1 && errno == EINTR); | |
1489 | if (vs->len == -1) { | |
1490 | err = -errno; | |
1491 | } | |
1492 | v9fs_read_post_readv(s, vs, err); | |
1493 | return; | |
1494 | } | |
1495 | out: | |
1496 | complete_pdu(s, vs->pdu, err); | |
1497 | qemu_free(vs); | |
1498 | } | |
1499 | ||
9f107513 AL |
1500 | static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
1501 | { | |
a9231555 AL |
1502 | int32_t fid; |
1503 | V9fsReadState *vs; | |
1504 | ssize_t err = 0; | |
1505 | ||
1506 | vs = qemu_malloc(sizeof(*vs)); | |
1507 | vs->pdu = pdu; | |
1508 | vs->offset = 7; | |
1509 | vs->total = 0; | |
1510 | vs->len = 0; | |
1511 | vs->count = 0; | |
1512 | ||
1513 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
1514 | ||
1515 | vs->fidp = lookup_fid(s, fid); | |
1516 | if (vs->fidp == NULL) { | |
1517 | err = -EINVAL; | |
1518 | goto out; | |
1519 | } | |
1520 | ||
1521 | if (vs->fidp->dir) { | |
1522 | vs->max_count = vs->count; | |
1523 | vs->count = 0; | |
1524 | if (vs->off == 0) { | |
1525 | v9fs_do_rewinddir(s, vs->fidp->dir); | |
1526 | } | |
1527 | v9fs_read_post_rewinddir(s, vs, err); | |
1528 | return; | |
1529 | } else if (vs->fidp->fd != -1) { | |
1530 | vs->sg = vs->iov; | |
1531 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
1532 | err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); | |
1533 | v9fs_read_post_lseek(s, vs, err); | |
1534 | return; | |
1535 | } else { | |
1536 | err = -EINVAL; | |
9f107513 | 1537 | } |
a9231555 AL |
1538 | out: |
1539 | complete_pdu(s, pdu, err); | |
1540 | qemu_free(vs); | |
9f107513 AL |
1541 | } |
1542 | ||
8449360c AL |
1543 | typedef struct V9fsWriteState { |
1544 | V9fsPDU *pdu; | |
1545 | size_t offset; | |
1546 | int32_t len; | |
1547 | int32_t count; | |
1548 | int32_t total; | |
1549 | int64_t off; | |
1550 | V9fsFidState *fidp; | |
1551 | struct iovec iov[128]; /* FIXME: bad, bad, bad */ | |
1552 | struct iovec *sg; | |
1553 | int cnt; | |
1554 | } V9fsWriteState; | |
1555 | ||
1556 | static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, | |
1557 | ssize_t err) | |
1558 | { | |
1559 | if (err < 0) { | |
1560 | /* IO error return the error */ | |
1561 | err = -errno; | |
1562 | goto out; | |
1563 | } | |
1564 | vs->total += vs->len; | |
1565 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1566 | if (vs->total < vs->count && vs->len > 0) { | |
1567 | do { | |
1568 | if (0) { | |
1569 | print_sg(vs->sg, vs->cnt); | |
1570 | } | |
1571 | vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1572 | } while (vs->len == -1 && errno == EINTR); | |
1573 | if (vs->len == -1) { | |
1574 | err = -errno; | |
1575 | } | |
1576 | v9fs_write_post_writev(s, vs, err); | |
1577 | return; | |
1578 | } | |
1579 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1580 | ||
1581 | err = vs->offset; | |
1582 | out: | |
1583 | complete_pdu(s, vs->pdu, err); | |
1584 | qemu_free(vs); | |
1585 | } | |
1586 | ||
1587 | static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) | |
1588 | { | |
1589 | if (err == -1) { | |
1590 | err = -errno; | |
1591 | goto out; | |
1592 | } | |
1593 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
1594 | ||
1595 | if (vs->total < vs->count) { | |
1596 | do { | |
1597 | if (0) { | |
1598 | print_sg(vs->sg, vs->cnt); | |
1599 | } | |
1600 | vs->len = v9fs_do_writev(s, vs->fidp->fd, vs->sg, vs->cnt); | |
1601 | } while (vs->len == -1 && errno == EINTR); | |
1602 | if (vs->len == -1) { | |
1603 | err = -errno; | |
1604 | } | |
1605 | v9fs_write_post_writev(s, vs, err); | |
1606 | return; | |
1607 | } | |
1608 | ||
1609 | out: | |
1610 | complete_pdu(s, vs->pdu, err); | |
1611 | qemu_free(vs); | |
1612 | } | |
1613 | ||
9f107513 AL |
1614 | static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
1615 | { | |
8449360c AL |
1616 | int32_t fid; |
1617 | V9fsWriteState *vs; | |
1618 | ssize_t err; | |
1619 | ||
1620 | vs = qemu_malloc(sizeof(*vs)); | |
1621 | ||
1622 | vs->pdu = pdu; | |
1623 | vs->offset = 7; | |
1624 | vs->sg = vs->iov; | |
1625 | vs->total = 0; | |
1626 | vs->len = 0; | |
1627 | ||
1628 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
1629 | vs->sg, &vs->cnt); | |
1630 | ||
1631 | vs->fidp = lookup_fid(s, fid); | |
1632 | if (vs->fidp == NULL) { | |
1633 | err = -EINVAL; | |
1634 | goto out; | |
9f107513 | 1635 | } |
8449360c AL |
1636 | |
1637 | if (vs->fidp->fd == -1) { | |
1638 | err = -EINVAL; | |
1639 | goto out; | |
1640 | } | |
1641 | ||
1642 | err = v9fs_do_lseek(s, vs->fidp->fd, vs->off, SEEK_SET); | |
1643 | ||
1644 | v9fs_write_post_lseek(s, vs, err); | |
1645 | return; | |
1646 | ||
1647 | out: | |
1648 | complete_pdu(s, vs->pdu, err); | |
1649 | qemu_free(vs); | |
9f107513 AL |
1650 | } |
1651 | ||
1652 | static void v9fs_create(V9fsState *s, V9fsPDU *pdu) | |
1653 | { | |
1654 | if (debug_9p_pdu) { | |
1655 | pprint_pdu(pdu); | |
1656 | } | |
1657 | } | |
1658 | ||
1659 | static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) | |
1660 | { | |
405a549a | 1661 | v9fs_dummy(s, pdu); |
9f107513 AL |
1662 | if (debug_9p_pdu) { |
1663 | pprint_pdu(pdu); | |
1664 | } | |
1665 | } | |
1666 | ||
1667 | static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) | |
1668 | { | |
1669 | if (debug_9p_pdu) { | |
1670 | pprint_pdu(pdu); | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) | |
1675 | { | |
1676 | if (debug_9p_pdu) { | |
1677 | pprint_pdu(pdu); | |
1678 | } | |
1679 | } | |
1680 | ||
1681 | typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); | |
1682 | ||
1683 | static pdu_handler_t *pdu_handlers[] = { | |
1684 | [P9_TVERSION] = v9fs_version, | |
1685 | [P9_TATTACH] = v9fs_attach, | |
1686 | [P9_TSTAT] = v9fs_stat, | |
1687 | [P9_TWALK] = v9fs_walk, | |
1688 | [P9_TCLUNK] = v9fs_clunk, | |
1689 | [P9_TOPEN] = v9fs_open, | |
1690 | [P9_TREAD] = v9fs_read, | |
1691 | #if 0 | |
1692 | [P9_TAUTH] = v9fs_auth, | |
1693 | #endif | |
1694 | [P9_TFLUSH] = v9fs_flush, | |
1695 | [P9_TCREATE] = v9fs_create, | |
1696 | [P9_TWRITE] = v9fs_write, | |
1697 | [P9_TWSTAT] = v9fs_wstat, | |
1698 | [P9_TREMOVE] = v9fs_remove, | |
1699 | }; | |
1700 | ||
1701 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) | |
1702 | { | |
1703 | pdu_handler_t *handler; | |
1704 | ||
1705 | if (debug_9p_pdu) { | |
1706 | pprint_pdu(pdu); | |
1707 | } | |
1708 | ||
1709 | BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); | |
1710 | ||
1711 | handler = pdu_handlers[pdu->id]; | |
1712 | BUG_ON(handler == NULL); | |
1713 | ||
1714 | handler(s, pdu); | |
1715 | } | |
1716 | ||
1717 | static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) | |
1718 | { | |
1719 | V9fsState *s = (V9fsState *)vdev; | |
1720 | V9fsPDU *pdu; | |
1721 | ssize_t len; | |
1722 | ||
1723 | while ((pdu = alloc_pdu(s)) && | |
1724 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
1725 | uint8_t *ptr; | |
1726 | ||
1727 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); | |
1728 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
1729 | ||
1730 | ptr = pdu->elem.out_sg[0].iov_base; | |
1731 | ||
1732 | memcpy(&pdu->size, ptr, 4); | |
1733 | pdu->id = ptr[4]; | |
1734 | memcpy(&pdu->tag, ptr + 5, 2); | |
1735 | ||
1736 | submit_pdu(s, pdu); | |
1737 | } | |
1738 | ||
1739 | free_pdu(s, pdu); | |
1740 | } | |
1741 | ||
1742 | static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features) | |
1743 | { | |
1744 | features |= 1 << VIRTIO_9P_MOUNT_TAG; | |
1745 | return features; | |
1746 | } | |
1747 | ||
1748 | static V9fsState *to_virtio_9p(VirtIODevice *vdev) | |
1749 | { | |
1750 | return (V9fsState *)vdev; | |
1751 | } | |
1752 | ||
1753 | static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) | |
1754 | { | |
1755 | struct virtio_9p_config *cfg; | |
1756 | V9fsState *s = to_virtio_9p(vdev); | |
1757 | ||
1758 | cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + | |
1759 | s->tag_len); | |
1760 | stw_raw(&cfg->tag_len, s->tag_len); | |
1761 | memcpy(cfg->tag, s->tag, s->tag_len); | |
1762 | memcpy(config, cfg, s->config_size); | |
1763 | qemu_free(cfg); | |
1764 | } | |
1765 | ||
1766 | VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) | |
1767 | { | |
1768 | V9fsState *s; | |
1769 | int i, len; | |
1770 | struct stat stat; | |
1771 | FsTypeEntry *fse; | |
1772 | ||
1773 | ||
1774 | s = (V9fsState *)virtio_common_init("virtio-9p", | |
1775 | VIRTIO_ID_9P, | |
1776 | sizeof(struct virtio_9p_config)+ | |
1777 | MAX_TAG_LEN, | |
1778 | sizeof(V9fsState)); | |
1779 | ||
1780 | /* initialize pdu allocator */ | |
1781 | QLIST_INIT(&s->free_list); | |
1782 | for (i = 0; i < (MAX_REQ - 1); i++) { | |
1783 | QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); | |
1784 | } | |
1785 | ||
1786 | s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); | |
1787 | ||
1788 | fse = get_fsdev_fsentry(conf->fsdev_id); | |
1789 | ||
1790 | if (!fse) { | |
1791 | /* We don't have a fsdev identified by fsdev_id */ | |
1792 | fprintf(stderr, "Virtio-9p device couldn't find fsdev " | |
1793 | "with the id %s\n", conf->fsdev_id); | |
1794 | exit(1); | |
1795 | } | |
1796 | ||
1797 | if (!fse->path || !conf->tag) { | |
1798 | /* we haven't specified a mount_tag or the path */ | |
1799 | fprintf(stderr, "fsdev with id %s needs path " | |
1800 | "and Virtio-9p device needs mount_tag arguments\n", | |
1801 | conf->fsdev_id); | |
1802 | exit(1); | |
1803 | } | |
1804 | ||
1805 | if (lstat(fse->path, &stat)) { | |
1806 | fprintf(stderr, "share path %s does not exist\n", fse->path); | |
1807 | exit(1); | |
1808 | } else if (!S_ISDIR(stat.st_mode)) { | |
1809 | fprintf(stderr, "share path %s is not a directory \n", fse->path); | |
1810 | exit(1); | |
1811 | } | |
1812 | ||
1813 | s->ctx.fs_root = qemu_strdup(fse->path); | |
1814 | len = strlen(conf->tag); | |
1815 | if (len > MAX_TAG_LEN) { | |
1816 | len = MAX_TAG_LEN; | |
1817 | } | |
1818 | /* s->tag is non-NULL terminated string */ | |
1819 | s->tag = qemu_malloc(len); | |
1820 | memcpy(s->tag, conf->tag, len); | |
1821 | s->tag_len = len; | |
1822 | s->ctx.uid = -1; | |
1823 | ||
1824 | s->ops = fse->ops; | |
1825 | s->vdev.get_features = virtio_9p_get_features; | |
1826 | s->config_size = sizeof(struct virtio_9p_config) + | |
1827 | s->tag_len; | |
1828 | s->vdev.get_config = virtio_9p_get_config; | |
1829 | ||
1830 | return &s->vdev; | |
1831 | } |