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