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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 | ||
873c3213 SW |
14 | #include "hw/virtio.h" |
15 | #include "hw/pc.h" | |
9f107513 | 16 | #include "qemu_socket.h" |
873c3213 | 17 | #include "hw/virtio-pci.h" |
9f107513 AL |
18 | #include "virtio-9p.h" |
19 | #include "fsdev/qemu-fsdev.h" | |
20 | #include "virtio-9p-debug.h" | |
fc22118d | 21 | #include "virtio-9p-xattr.h" |
ff06030f | 22 | #include "virtio-9p-coth.h" |
9f107513 | 23 | |
9f107513 AL |
24 | int debug_9p_pdu; |
25 | ||
fac4f111 VJ |
26 | enum { |
27 | Oread = 0x00, | |
28 | Owrite = 0x01, | |
29 | Ordwr = 0x02, | |
30 | Oexec = 0x03, | |
31 | Oexcl = 0x04, | |
32 | Otrunc = 0x10, | |
33 | Orexec = 0x20, | |
34 | Orclose = 0x40, | |
35 | Oappend = 0x80, | |
36 | }; | |
37 | ||
38 | static int omode_to_uflags(int8_t mode) | |
39 | { | |
40 | int ret = 0; | |
41 | ||
42 | switch (mode & 3) { | |
43 | case Oread: | |
44 | ret = O_RDONLY; | |
45 | break; | |
46 | case Ordwr: | |
47 | ret = O_RDWR; | |
48 | break; | |
49 | case Owrite: | |
50 | ret = O_WRONLY; | |
51 | break; | |
52 | case Oexec: | |
53 | ret = O_RDONLY; | |
54 | break; | |
55 | } | |
56 | ||
57 | if (mode & Otrunc) { | |
58 | ret |= O_TRUNC; | |
59 | } | |
60 | ||
61 | if (mode & Oappend) { | |
62 | ret |= O_APPEND; | |
63 | } | |
64 | ||
65 | if (mode & Oexcl) { | |
66 | ret |= O_EXCL; | |
67 | } | |
68 | ||
69 | return ret; | |
70 | } | |
71 | ||
758e8e38 | 72 | void cred_init(FsCred *credp) |
131dcb25 | 73 | { |
758e8e38 VJ |
74 | credp->fc_uid = -1; |
75 | credp->fc_gid = -1; | |
76 | credp->fc_mode = -1; | |
77 | credp->fc_rdev = -1; | |
131dcb25 AL |
78 | } |
79 | ||
758e8e38 | 80 | static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
131dcb25 | 81 | { |
758e8e38 | 82 | return s->ops->lstat(&s->ctx, path->data, stbuf); |
131dcb25 AL |
83 | } |
84 | ||
131dcb25 AL |
85 | static int v9fs_do_close(V9fsState *s, int fd) |
86 | { | |
87 | return s->ops->close(&s->ctx, fd); | |
88 | } | |
89 | ||
90 | static int v9fs_do_closedir(V9fsState *s, DIR *dir) | |
91 | { | |
92 | return s->ops->closedir(&s->ctx, dir); | |
93 | } | |
94 | ||
a6568fe2 AL |
95 | static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
96 | { | |
97 | return s->ops->open(&s->ctx, path->data, flags); | |
98 | } | |
99 | ||
100 | static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path) | |
101 | { | |
102 | return s->ops->opendir(&s->ctx, path->data); | |
103 | } | |
104 | ||
a9231555 AL |
105 | static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
106 | { | |
107 | return s->ops->rewinddir(&s->ctx, dir); | |
108 | } | |
109 | ||
110 | static off_t v9fs_do_telldir(V9fsState *s, DIR *dir) | |
111 | { | |
112 | return s->ops->telldir(&s->ctx, dir); | |
113 | } | |
114 | ||
a9231555 AL |
115 | static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
116 | { | |
117 | return s->ops->seekdir(&s->ctx, dir, off); | |
118 | } | |
119 | ||
56d15a53 SG |
120 | static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov, |
121 | int iovcnt, int64_t offset) | |
a9231555 | 122 | { |
56d15a53 | 123 | return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset); |
a9231555 AL |
124 | } |
125 | ||
56d15a53 SG |
126 | static int v9fs_do_pwritev(V9fsState *s, int fd, const struct iovec *iov, |
127 | int iovcnt, int64_t offset) | |
a9231555 | 128 | { |
56d15a53 | 129 | return s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset); |
8449360c AL |
130 | } |
131 | ||
c494dd6f AL |
132 | static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
133 | { | |
e95ead32 VJ |
134 | FsCred cred; |
135 | cred_init(&cred); | |
136 | cred.fc_mode = mode; | |
137 | return s->ops->chmod(&s->ctx, path->data, &cred); | |
c494dd6f AL |
138 | } |
139 | ||
5268cecc MK |
140 | static int v9fs_do_mknod(V9fsState *s, char *name, |
141 | mode_t mode, dev_t dev, uid_t uid, gid_t gid) | |
c494dd6f | 142 | { |
1c293312 VJ |
143 | FsCred cred; |
144 | cred_init(&cred); | |
5268cecc MK |
145 | cred.fc_uid = uid; |
146 | cred.fc_gid = gid; | |
1c293312 VJ |
147 | cred.fc_mode = mode; |
148 | cred.fc_rdev = dev; | |
5268cecc | 149 | return s->ops->mknod(&s->ctx, name, &cred); |
c494dd6f AL |
150 | } |
151 | ||
b67592ea MK |
152 | static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode, |
153 | uid_t uid, gid_t gid) | |
c494dd6f | 154 | { |
00ec5c37 VJ |
155 | FsCred cred; |
156 | ||
157 | cred_init(&cred); | |
b67592ea MK |
158 | cred.fc_uid = uid; |
159 | cred.fc_gid = gid; | |
160 | cred.fc_mode = mode; | |
00ec5c37 | 161 | |
b67592ea | 162 | return s->ops->mkdir(&s->ctx, name, &cred); |
c494dd6f AL |
163 | } |
164 | ||
165 | static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) | |
166 | { | |
167 | return s->ops->fstat(&s->ctx, fd, stbuf); | |
168 | } | |
169 | ||
c1568af5 VJ |
170 | static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid, |
171 | int flags, int mode) | |
c494dd6f | 172 | { |
4750a96f | 173 | FsCred cred; |
4750a96f VJ |
174 | |
175 | cred_init(&cred); | |
c1568af5 VJ |
176 | cred.fc_uid = uid; |
177 | cred.fc_gid = gid; | |
178 | cred.fc_mode = mode & 07777; | |
4750a96f | 179 | |
c1568af5 | 180 | return s->ops->open2(&s->ctx, fullname, flags, &cred); |
c494dd6f AL |
181 | } |
182 | ||
08c60fc9 VJ |
183 | static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
184 | const char *oldpath, const char *newpath, gid_t gid) | |
c494dd6f | 185 | { |
879c2813 VJ |
186 | FsCred cred; |
187 | cred_init(&cred); | |
08c60fc9 VJ |
188 | cred.fc_uid = fidp->uid; |
189 | cred.fc_gid = gid; | |
190 | cred.fc_mode = 0777; | |
879c2813 | 191 | |
08c60fc9 | 192 | return s->ops->symlink(&s->ctx, oldpath, newpath, &cred); |
c494dd6f AL |
193 | } |
194 | ||
195 | static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) | |
196 | { | |
197 | return s->ops->link(&s->ctx, oldpath->data, newpath->data); | |
198 | } | |
199 | ||
8cf89e00 AL |
200 | static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
201 | { | |
202 | return s->ops->truncate(&s->ctx, path->data, size); | |
203 | } | |
204 | ||
205 | static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, | |
206 | V9fsString *newpath) | |
207 | { | |
208 | return s->ops->rename(&s->ctx, oldpath->data, newpath->data); | |
209 | } | |
210 | ||
211 | static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) | |
212 | { | |
f7613bee VJ |
213 | FsCred cred; |
214 | cred_init(&cred); | |
215 | cred.fc_uid = uid; | |
216 | cred.fc_gid = gid; | |
217 | ||
218 | return s->ops->chown(&s->ctx, path->data, &cred); | |
8cf89e00 AL |
219 | } |
220 | ||
8fc39ae4 SK |
221 | static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
222 | const struct timespec times[2]) | |
8cf89e00 | 223 | { |
8fc39ae4 | 224 | return s->ops->utimensat(&s->ctx, path->data, times); |
8cf89e00 AL |
225 | } |
226 | ||
5bae1900 AL |
227 | static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
228 | { | |
229 | return s->ops->remove(&s->ctx, path->data); | |
230 | } | |
231 | ||
49594973 | 232 | static int v9fs_do_fsync(V9fsState *s, int fd, int datasync) |
8cf89e00 | 233 | { |
49594973 | 234 | return s->ops->fsync(&s->ctx, fd, datasync); |
8cf89e00 AL |
235 | } |
236 | ||
5e94c103 MK |
237 | static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
238 | { | |
239 | return s->ops->statfs(&s->ctx, path->data, stbuf); | |
240 | } | |
241 | ||
10b468bd AK |
242 | static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
243 | V9fsString *xattr_name, | |
244 | void *value, size_t size, int flags) | |
245 | { | |
246 | return s->ops->lsetxattr(&s->ctx, path->data, | |
247 | xattr_name->data, value, size, flags); | |
248 | } | |
249 | ||
9ed3ef26 AK |
250 | static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path, |
251 | V9fsString *xattr_name) | |
252 | { | |
253 | return s->ops->lremovexattr(&s->ctx, path->data, | |
254 | xattr_name->data); | |
255 | } | |
256 | ||
257 | ||
a03f7874 AL |
258 | static void v9fs_string_init(V9fsString *str) |
259 | { | |
260 | str->data = NULL; | |
261 | str->size = 0; | |
262 | } | |
263 | ||
264 | static void v9fs_string_free(V9fsString *str) | |
265 | { | |
266 | qemu_free(str->data); | |
267 | str->data = NULL; | |
268 | str->size = 0; | |
269 | } | |
270 | ||
271 | static void v9fs_string_null(V9fsString *str) | |
272 | { | |
273 | v9fs_string_free(str); | |
274 | } | |
275 | ||
276 | static int number_to_string(void *arg, char type) | |
277 | { | |
278 | unsigned int ret = 0; | |
279 | ||
280 | switch (type) { | |
281 | case 'u': { | |
282 | unsigned int num = *(unsigned int *)arg; | |
283 | ||
284 | do { | |
285 | ret++; | |
286 | num = num/10; | |
287 | } while (num); | |
288 | break; | |
289 | } | |
45b23ff8 VJ |
290 | case 'U': { |
291 | unsigned long num = *(unsigned long *)arg; | |
292 | do { | |
293 | ret++; | |
294 | num = num/10; | |
295 | } while (num); | |
296 | break; | |
297 | } | |
a03f7874 AL |
298 | default: |
299 | printf("Number_to_string: Unknown number format\n"); | |
300 | return -1; | |
301 | } | |
302 | ||
303 | return ret; | |
304 | } | |
305 | ||
c9ba47dc SW |
306 | static int GCC_FMT_ATTR(2, 0) |
307 | v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
a03f7874 AL |
308 | { |
309 | va_list ap2; | |
310 | char *iter = (char *)fmt; | |
311 | int len = 0; | |
312 | int nr_args = 0; | |
313 | char *arg_char_ptr; | |
314 | unsigned int arg_uint; | |
45b23ff8 | 315 | unsigned long arg_ulong; |
a03f7874 AL |
316 | |
317 | /* Find the number of %'s that denotes an argument */ | |
318 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
319 | nr_args++; | |
320 | iter++; | |
321 | } | |
322 | ||
323 | len = strlen(fmt) - 2*nr_args; | |
324 | ||
325 | if (!nr_args) { | |
326 | goto alloc_print; | |
327 | } | |
328 | ||
329 | va_copy(ap2, ap); | |
330 | ||
331 | iter = (char *)fmt; | |
332 | ||
333 | /* Now parse the format string */ | |
334 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
335 | iter++; | |
336 | switch (*iter) { | |
337 | case 'u': | |
338 | arg_uint = va_arg(ap2, unsigned int); | |
339 | len += number_to_string((void *)&arg_uint, 'u'); | |
340 | break; | |
45b23ff8 VJ |
341 | case 'l': |
342 | if (*++iter == 'u') { | |
343 | arg_ulong = va_arg(ap2, unsigned long); | |
344 | len += number_to_string((void *)&arg_ulong, 'U'); | |
345 | } else { | |
346 | return -1; | |
347 | } | |
348 | break; | |
a03f7874 AL |
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 | ||
c9ba47dc SW |
370 | static void GCC_FMT_ATTR(2, 3) |
371 | v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
a03f7874 AL |
372 | { |
373 | va_list ap; | |
374 | int err; | |
375 | ||
376 | v9fs_string_free(str); | |
377 | ||
378 | va_start(ap, fmt); | |
379 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
380 | BUG_ON(err == -1); | |
381 | va_end(ap); | |
382 | ||
383 | str->size = err; | |
384 | } | |
385 | ||
386 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
387 | { | |
388 | v9fs_string_free(lhs); | |
389 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
390 | } | |
391 | ||
936532a4 MN |
392 | /* |
393 | * Return TRUE if s1 is an ancestor of s2. | |
394 | * | |
395 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". | |
396 | * As a special case, We treat s1 as ancestor of s2 if they are same! | |
397 | */ | |
398 | static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2) | |
399 | { | |
400 | if (!strncmp(s1->data, s2->data, s1->size)) { | |
401 | if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') { | |
402 | return 1; | |
403 | } | |
404 | } | |
405 | return 0; | |
406 | } | |
407 | ||
a03f7874 AL |
408 | static size_t v9fs_string_size(V9fsString *str) |
409 | { | |
410 | return str->size; | |
411 | } | |
412 | ||
286d5652 AL |
413 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
414 | { | |
415 | V9fsFidState *f; | |
416 | ||
417 | for (f = s->fid_list; f; f = f->next) { | |
418 | if (f->fid == fid) { | |
286d5652 AL |
419 | return f; |
420 | } | |
421 | } | |
422 | ||
423 | return NULL; | |
424 | } | |
425 | ||
426 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
427 | { | |
428 | V9fsFidState *f; | |
429 | ||
430 | f = lookup_fid(s, fid); | |
431 | if (f) { | |
432 | return NULL; | |
433 | } | |
434 | ||
435 | f = qemu_mallocz(sizeof(V9fsFidState)); | |
436 | ||
437 | f->fid = fid; | |
d62dbb51 | 438 | f->fid_type = P9_FID_NONE; |
286d5652 AL |
439 | |
440 | f->next = s->fid_list; | |
441 | s->fid_list = f; | |
442 | ||
443 | return f; | |
444 | } | |
445 | ||
10b468bd AK |
446 | static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
447 | { | |
448 | int retval = 0; | |
449 | ||
450 | if (fidp->fs.xattr.copied_len == -1) { | |
451 | /* getxattr/listxattr fid */ | |
452 | goto free_value; | |
453 | } | |
454 | /* | |
455 | * if this is fid for setxattr. clunk should | |
456 | * result in setxattr localcall | |
457 | */ | |
458 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
459 | /* clunk after partial write */ | |
460 | retval = -EINVAL; | |
461 | goto free_out; | |
462 | } | |
9ed3ef26 AK |
463 | if (fidp->fs.xattr.len) { |
464 | retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, | |
465 | fidp->fs.xattr.value, | |
466 | fidp->fs.xattr.len, | |
467 | fidp->fs.xattr.flags); | |
468 | } else { | |
469 | retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); | |
470 | } | |
10b468bd AK |
471 | free_out: |
472 | v9fs_string_free(&fidp->fs.xattr.name); | |
473 | free_value: | |
474 | if (fidp->fs.xattr.value) { | |
475 | qemu_free(fidp->fs.xattr.value); | |
476 | } | |
477 | return retval; | |
478 | } | |
479 | ||
286d5652 AL |
480 | static int free_fid(V9fsState *s, int32_t fid) |
481 | { | |
10b468bd | 482 | int retval = 0; |
286d5652 AL |
483 | V9fsFidState **fidpp, *fidp; |
484 | ||
485 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
486 | if ((*fidpp)->fid == fid) { | |
487 | break; | |
488 | } | |
489 | } | |
490 | ||
491 | if (*fidpp == NULL) { | |
492 | return -ENOENT; | |
493 | } | |
494 | ||
495 | fidp = *fidpp; | |
496 | *fidpp = fidp->next; | |
497 | ||
d62dbb51 AK |
498 | if (fidp->fid_type == P9_FID_FILE) { |
499 | v9fs_do_close(s, fidp->fs.fd); | |
500 | } else if (fidp->fid_type == P9_FID_DIR) { | |
501 | v9fs_do_closedir(s, fidp->fs.dir); | |
502 | } else if (fidp->fid_type == P9_FID_XATTR) { | |
10b468bd | 503 | retval = v9fs_xattr_fid_clunk(s, fidp); |
286d5652 AL |
504 | } |
505 | v9fs_string_free(&fidp->path); | |
506 | qemu_free(fidp); | |
507 | ||
10b468bd | 508 | return retval; |
286d5652 AL |
509 | } |
510 | ||
511 | #define P9_QID_TYPE_DIR 0x80 | |
512 | #define P9_QID_TYPE_SYMLINK 0x02 | |
513 | ||
514 | #define P9_STAT_MODE_DIR 0x80000000 | |
515 | #define P9_STAT_MODE_APPEND 0x40000000 | |
516 | #define P9_STAT_MODE_EXCL 0x20000000 | |
517 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
518 | #define P9_STAT_MODE_AUTH 0x08000000 | |
519 | #define P9_STAT_MODE_TMP 0x04000000 | |
520 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
521 | #define P9_STAT_MODE_LINK 0x01000000 | |
522 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
523 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
524 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
525 | #define P9_STAT_MODE_SETUID 0x00080000 | |
526 | #define P9_STAT_MODE_SETGID 0x00040000 | |
527 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
528 | ||
529 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
530 | P9_STAT_MODE_SYMLINK | \ | |
531 | P9_STAT_MODE_LINK | \ | |
532 | P9_STAT_MODE_DEVICE | \ | |
533 | P9_STAT_MODE_NAMED_PIPE | \ | |
534 | P9_STAT_MODE_SOCKET) | |
535 | ||
536 | /* This is the algorithm from ufs in spfs */ | |
537 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
538 | { | |
539 | size_t size; | |
540 | ||
541 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
542 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
543 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
544 | qidp->type = 0; | |
545 | if (S_ISDIR(stbuf->st_mode)) { | |
546 | qidp->type |= P9_QID_TYPE_DIR; | |
547 | } | |
548 | if (S_ISLNK(stbuf->st_mode)) { | |
549 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
550 | } | |
551 | } | |
552 | ||
553 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
554 | { | |
555 | struct stat stbuf; | |
556 | int err; | |
557 | ||
558 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
559 | if (err) { | |
560 | return err; | |
561 | } | |
562 | ||
563 | stat_to_qid(&stbuf, qidp); | |
564 | return 0; | |
565 | } | |
566 | ||
9f107513 AL |
567 | static V9fsPDU *alloc_pdu(V9fsState *s) |
568 | { | |
569 | V9fsPDU *pdu = NULL; | |
570 | ||
571 | if (!QLIST_EMPTY(&s->free_list)) { | |
572 | pdu = QLIST_FIRST(&s->free_list); | |
573 | QLIST_REMOVE(pdu, next); | |
574 | } | |
575 | return pdu; | |
576 | } | |
577 | ||
578 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
579 | { | |
580 | if (pdu) { | |
39792515 AK |
581 | if (debug_9p_pdu) { |
582 | pprint_pdu(pdu); | |
583 | } | |
584 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
9f107513 AL |
585 | } |
586 | } | |
587 | ||
588 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
589 | size_t offset, size_t size, int pack) | |
590 | { | |
591 | int i = 0; | |
592 | size_t copied = 0; | |
593 | ||
594 | for (i = 0; size && i < sg_count; i++) { | |
595 | size_t len; | |
596 | if (offset >= sg[i].iov_len) { | |
597 | /* skip this sg */ | |
598 | offset -= sg[i].iov_len; | |
599 | continue; | |
600 | } else { | |
601 | len = MIN(sg[i].iov_len - offset, size); | |
602 | if (pack) { | |
603 | memcpy(sg[i].iov_base + offset, addr, len); | |
604 | } else { | |
605 | memcpy(addr, sg[i].iov_base + offset, len); | |
606 | } | |
607 | size -= len; | |
608 | copied += len; | |
609 | addr += len; | |
610 | if (size) { | |
611 | offset = 0; | |
612 | continue; | |
613 | } | |
614 | } | |
615 | } | |
616 | ||
617 | return copied; | |
618 | } | |
619 | ||
405a549a AL |
620 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
621 | { | |
622 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
623 | offset, size, 0); | |
624 | } | |
625 | ||
626 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
627 | size_t size) | |
628 | { | |
629 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
630 | offset, size, 1); | |
631 | } | |
632 | ||
633 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
634 | { | |
635 | size_t pos = 0; | |
636 | int i, j; | |
637 | struct iovec *src_sg; | |
638 | unsigned int num; | |
639 | ||
640 | if (rx) { | |
641 | src_sg = pdu->elem.in_sg; | |
642 | num = pdu->elem.in_num; | |
643 | } else { | |
644 | src_sg = pdu->elem.out_sg; | |
645 | num = pdu->elem.out_num; | |
646 | } | |
647 | ||
648 | j = 0; | |
649 | for (i = 0; i < num; i++) { | |
650 | if (offset <= pos) { | |
651 | sg[j].iov_base = src_sg[i].iov_base; | |
652 | sg[j].iov_len = src_sg[i].iov_len; | |
653 | j++; | |
654 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
655 | sg[j].iov_base = src_sg[i].iov_base; | |
656 | sg[j].iov_len = src_sg[i].iov_len; | |
657 | sg[j].iov_base += (offset - pos); | |
658 | sg[j].iov_len -= (offset - pos); | |
659 | j++; | |
660 | } | |
661 | pos += src_sg[i].iov_len; | |
662 | } | |
663 | ||
664 | return j; | |
665 | } | |
666 | ||
667 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
668 | { | |
669 | size_t old_offset = offset; | |
670 | va_list ap; | |
671 | int i; | |
672 | ||
673 | va_start(ap, fmt); | |
674 | for (i = 0; fmt[i]; i++) { | |
675 | switch (fmt[i]) { | |
676 | case 'b': { | |
677 | uint8_t *valp = va_arg(ap, uint8_t *); | |
678 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
679 | break; | |
680 | } | |
681 | case 'w': { | |
682 | uint16_t val, *valp; | |
683 | valp = va_arg(ap, uint16_t *); | |
405a549a | 684 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 685 | *valp = le16_to_cpu(val); |
405a549a AL |
686 | break; |
687 | } | |
688 | case 'd': { | |
689 | uint32_t val, *valp; | |
690 | valp = va_arg(ap, uint32_t *); | |
405a549a | 691 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 692 | *valp = le32_to_cpu(val); |
405a549a AL |
693 | break; |
694 | } | |
695 | case 'q': { | |
696 | uint64_t val, *valp; | |
697 | valp = va_arg(ap, uint64_t *); | |
405a549a | 698 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 699 | *valp = le64_to_cpu(val); |
405a549a AL |
700 | break; |
701 | } | |
702 | case 'v': { | |
703 | struct iovec *iov = va_arg(ap, struct iovec *); | |
704 | int *iovcnt = va_arg(ap, int *); | |
705 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
706 | break; | |
707 | } | |
708 | case 's': { | |
709 | V9fsString *str = va_arg(ap, V9fsString *); | |
710 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
711 | /* FIXME: sanity check str->size */ | |
712 | str->data = qemu_malloc(str->size + 1); | |
713 | offset += pdu_unpack(str->data, pdu, offset, str->size); | |
714 | str->data[str->size] = 0; | |
715 | break; | |
716 | } | |
717 | case 'Q': { | |
718 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
719 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
720 | &qidp->type, &qidp->version, &qidp->path); | |
721 | break; | |
722 | } | |
723 | case 'S': { | |
724 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
725 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
726 | &statp->size, &statp->type, &statp->dev, | |
727 | &statp->qid, &statp->mode, &statp->atime, | |
728 | &statp->mtime, &statp->length, | |
729 | &statp->name, &statp->uid, &statp->gid, | |
730 | &statp->muid, &statp->extension, | |
731 | &statp->n_uid, &statp->n_gid, | |
732 | &statp->n_muid); | |
733 | break; | |
734 | } | |
c79ce737 SK |
735 | case 'I': { |
736 | V9fsIattr *iattr = va_arg(ap, V9fsIattr *); | |
737 | offset += pdu_unmarshal(pdu, offset, "ddddqqqqq", | |
738 | &iattr->valid, &iattr->mode, | |
739 | &iattr->uid, &iattr->gid, &iattr->size, | |
740 | &iattr->atime_sec, &iattr->atime_nsec, | |
741 | &iattr->mtime_sec, &iattr->mtime_nsec); | |
742 | break; | |
743 | } | |
405a549a AL |
744 | default: |
745 | break; | |
746 | } | |
747 | } | |
748 | ||
749 | va_end(ap); | |
750 | ||
751 | return offset - old_offset; | |
752 | } | |
753 | ||
754 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
755 | { | |
756 | size_t old_offset = offset; | |
757 | va_list ap; | |
758 | int i; | |
759 | ||
760 | va_start(ap, fmt); | |
761 | for (i = 0; fmt[i]; i++) { | |
762 | switch (fmt[i]) { | |
763 | case 'b': { | |
764 | uint8_t val = va_arg(ap, int); | |
765 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
766 | break; | |
767 | } | |
768 | case 'w': { | |
769 | uint16_t val; | |
770 | cpu_to_le16w(&val, va_arg(ap, int)); | |
771 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
772 | break; | |
773 | } | |
774 | case 'd': { | |
775 | uint32_t val; | |
776 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
777 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
778 | break; | |
779 | } | |
780 | case 'q': { | |
781 | uint64_t val; | |
782 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
783 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
784 | break; | |
785 | } | |
786 | case 'v': { | |
787 | struct iovec *iov = va_arg(ap, struct iovec *); | |
788 | int *iovcnt = va_arg(ap, int *); | |
789 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
790 | break; | |
791 | } | |
792 | case 's': { | |
793 | V9fsString *str = va_arg(ap, V9fsString *); | |
794 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
795 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
796 | break; | |
797 | } | |
798 | case 'Q': { | |
799 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
800 | offset += pdu_marshal(pdu, offset, "bdq", | |
801 | qidp->type, qidp->version, qidp->path); | |
802 | break; | |
803 | } | |
804 | case 'S': { | |
805 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
806 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
807 | statp->size, statp->type, statp->dev, | |
808 | &statp->qid, statp->mode, statp->atime, | |
809 | statp->mtime, statp->length, &statp->name, | |
810 | &statp->uid, &statp->gid, &statp->muid, | |
811 | &statp->extension, statp->n_uid, | |
812 | statp->n_gid, statp->n_muid); | |
813 | break; | |
814 | } | |
00ede4c2 SK |
815 | case 'A': { |
816 | V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); | |
817 | offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq", | |
818 | statp->st_result_mask, | |
819 | &statp->qid, statp->st_mode, | |
820 | statp->st_uid, statp->st_gid, | |
821 | statp->st_nlink, statp->st_rdev, | |
822 | statp->st_size, statp->st_blksize, statp->st_blocks, | |
823 | statp->st_atime_sec, statp->st_atime_nsec, | |
824 | statp->st_mtime_sec, statp->st_mtime_nsec, | |
825 | statp->st_ctime_sec, statp->st_ctime_nsec, | |
826 | statp->st_btime_sec, statp->st_btime_nsec, | |
827 | statp->st_gen, statp->st_data_version); | |
828 | break; | |
829 | } | |
405a549a AL |
830 | default: |
831 | break; | |
832 | } | |
833 | } | |
834 | va_end(ap); | |
835 | ||
836 | return offset - old_offset; | |
837 | } | |
838 | ||
839 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
840 | { | |
841 | int8_t id = pdu->id + 1; /* Response */ | |
842 | ||
843 | if (len < 0) { | |
405a549a | 844 | int err = -len; |
8f4d1ca5 | 845 | len = 7; |
405a549a | 846 | |
8f4d1ca5 AB |
847 | if (s->proto_version != V9FS_PROTO_2000L) { |
848 | V9fsString str; | |
849 | ||
850 | str.data = strerror(err); | |
851 | str.size = strlen(str.data); | |
852 | ||
853 | len += pdu_marshal(pdu, len, "s", &str); | |
854 | id = P9_RERROR; | |
855 | } | |
405a549a | 856 | |
cf03eb2c | 857 | len += pdu_marshal(pdu, len, "d", err); |
405a549a | 858 | |
8f4d1ca5 AB |
859 | if (s->proto_version == V9FS_PROTO_2000L) { |
860 | id = P9_RLERROR; | |
861 | } | |
405a549a AL |
862 | } |
863 | ||
864 | /* fill out the header */ | |
865 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
866 | ||
867 | /* keep these in sync */ | |
868 | pdu->size = len; | |
869 | pdu->id = id; | |
870 | ||
871 | /* push onto queue and notify */ | |
872 | virtqueue_push(s->vq, &pdu->elem, len); | |
873 | ||
874 | /* FIXME: we should batch these completions */ | |
875 | virtio_notify(&s->vdev, s->vq); | |
876 | ||
877 | free_pdu(s, pdu); | |
878 | } | |
879 | ||
bb9e3216 AL |
880 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
881 | { | |
882 | mode_t ret; | |
883 | ||
884 | ret = mode & 0777; | |
885 | if (mode & P9_STAT_MODE_DIR) { | |
886 | ret |= S_IFDIR; | |
887 | } | |
888 | ||
cf03eb2c AB |
889 | if (mode & P9_STAT_MODE_SYMLINK) { |
890 | ret |= S_IFLNK; | |
891 | } | |
892 | if (mode & P9_STAT_MODE_SOCKET) { | |
893 | ret |= S_IFSOCK; | |
894 | } | |
895 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
896 | ret |= S_IFIFO; | |
897 | } | |
898 | if (mode & P9_STAT_MODE_DEVICE) { | |
899 | if (extension && extension->data[0] == 'c') { | |
900 | ret |= S_IFCHR; | |
901 | } else { | |
902 | ret |= S_IFBLK; | |
bb9e3216 AL |
903 | } |
904 | } | |
905 | ||
906 | if (!(ret&~0777)) { | |
907 | ret |= S_IFREG; | |
908 | } | |
909 | ||
910 | if (mode & P9_STAT_MODE_SETUID) { | |
911 | ret |= S_ISUID; | |
912 | } | |
913 | if (mode & P9_STAT_MODE_SETGID) { | |
914 | ret |= S_ISGID; | |
915 | } | |
916 | if (mode & P9_STAT_MODE_SETVTX) { | |
917 | ret |= S_ISVTX; | |
918 | } | |
919 | ||
920 | return ret; | |
921 | } | |
922 | ||
923 | static int donttouch_stat(V9fsStat *stat) | |
924 | { | |
925 | if (stat->type == -1 && | |
926 | stat->dev == -1 && | |
927 | stat->qid.type == -1 && | |
928 | stat->qid.version == -1 && | |
929 | stat->qid.path == -1 && | |
930 | stat->mode == -1 && | |
931 | stat->atime == -1 && | |
932 | stat->mtime == -1 && | |
933 | stat->length == -1 && | |
934 | !stat->name.size && | |
935 | !stat->uid.size && | |
936 | !stat->gid.size && | |
937 | !stat->muid.size && | |
938 | stat->n_uid == -1 && | |
939 | stat->n_gid == -1 && | |
940 | stat->n_muid == -1) { | |
941 | return 1; | |
942 | } | |
943 | ||
944 | return 0; | |
945 | } | |
946 | ||
947 | static void v9fs_stat_free(V9fsStat *stat) | |
948 | { | |
949 | v9fs_string_free(&stat->name); | |
950 | v9fs_string_free(&stat->uid); | |
951 | v9fs_string_free(&stat->gid); | |
952 | v9fs_string_free(&stat->muid); | |
953 | v9fs_string_free(&stat->extension); | |
954 | } | |
955 | ||
956 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
957 | { | |
958 | uint32_t mode; | |
959 | ||
960 | mode = stbuf->st_mode & 0777; | |
961 | if (S_ISDIR(stbuf->st_mode)) { | |
962 | mode |= P9_STAT_MODE_DIR; | |
963 | } | |
964 | ||
cf03eb2c AB |
965 | if (S_ISLNK(stbuf->st_mode)) { |
966 | mode |= P9_STAT_MODE_SYMLINK; | |
967 | } | |
bb9e3216 | 968 | |
cf03eb2c AB |
969 | if (S_ISSOCK(stbuf->st_mode)) { |
970 | mode |= P9_STAT_MODE_SOCKET; | |
971 | } | |
bb9e3216 | 972 | |
cf03eb2c AB |
973 | if (S_ISFIFO(stbuf->st_mode)) { |
974 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
975 | } | |
bb9e3216 | 976 | |
cf03eb2c AB |
977 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
978 | mode |= P9_STAT_MODE_DEVICE; | |
979 | } | |
bb9e3216 | 980 | |
cf03eb2c AB |
981 | if (stbuf->st_mode & S_ISUID) { |
982 | mode |= P9_STAT_MODE_SETUID; | |
983 | } | |
bb9e3216 | 984 | |
cf03eb2c AB |
985 | if (stbuf->st_mode & S_ISGID) { |
986 | mode |= P9_STAT_MODE_SETGID; | |
987 | } | |
bb9e3216 | 988 | |
cf03eb2c AB |
989 | if (stbuf->st_mode & S_ISVTX) { |
990 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
991 | } |
992 | ||
993 | return mode; | |
994 | } | |
995 | ||
996 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
997 | const struct stat *stbuf, | |
998 | V9fsStat *v9stat) | |
999 | { | |
1000 | int err; | |
1001 | const char *str; | |
1002 | ||
1003 | memset(v9stat, 0, sizeof(*v9stat)); | |
1004 | ||
1005 | stat_to_qid(stbuf, &v9stat->qid); | |
1006 | v9stat->mode = stat_to_v9mode(stbuf); | |
1007 | v9stat->atime = stbuf->st_atime; | |
1008 | v9stat->mtime = stbuf->st_mtime; | |
1009 | v9stat->length = stbuf->st_size; | |
1010 | ||
1011 | v9fs_string_null(&v9stat->uid); | |
1012 | v9fs_string_null(&v9stat->gid); | |
1013 | v9fs_string_null(&v9stat->muid); | |
1014 | ||
cf03eb2c AB |
1015 | v9stat->n_uid = stbuf->st_uid; |
1016 | v9stat->n_gid = stbuf->st_gid; | |
1017 | v9stat->n_muid = 0; | |
bb9e3216 | 1018 | |
cf03eb2c | 1019 | v9fs_string_null(&v9stat->extension); |
bb9e3216 | 1020 | |
cf03eb2c | 1021 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
7a5ca31e VJ |
1022 | err = v9fs_co_readlink(s, name, &v9stat->extension); |
1023 | if (err < 0) { | |
cf03eb2c | 1024 | return err; |
bb9e3216 | 1025 | } |
cf03eb2c AB |
1026 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1027 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
1028 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
1029 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
1030 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
1031 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
1032 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
1033 | } |
1034 | ||
1035 | str = strrchr(name->data, '/'); | |
1036 | if (str) { | |
1037 | str += 1; | |
1038 | } else { | |
1039 | str = name->data; | |
1040 | } | |
1041 | ||
1042 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
1043 | ||
1044 | v9stat->size = 61 + | |
1045 | v9fs_string_size(&v9stat->name) + | |
1046 | v9fs_string_size(&v9stat->uid) + | |
1047 | v9fs_string_size(&v9stat->gid) + | |
1048 | v9fs_string_size(&v9stat->muid) + | |
1049 | v9fs_string_size(&v9stat->extension); | |
1050 | return 0; | |
1051 | } | |
1052 | ||
00ede4c2 SK |
1053 | #define P9_STATS_MODE 0x00000001ULL |
1054 | #define P9_STATS_NLINK 0x00000002ULL | |
1055 | #define P9_STATS_UID 0x00000004ULL | |
1056 | #define P9_STATS_GID 0x00000008ULL | |
1057 | #define P9_STATS_RDEV 0x00000010ULL | |
1058 | #define P9_STATS_ATIME 0x00000020ULL | |
1059 | #define P9_STATS_MTIME 0x00000040ULL | |
1060 | #define P9_STATS_CTIME 0x00000080ULL | |
1061 | #define P9_STATS_INO 0x00000100ULL | |
1062 | #define P9_STATS_SIZE 0x00000200ULL | |
1063 | #define P9_STATS_BLOCKS 0x00000400ULL | |
1064 | ||
1065 | #define P9_STATS_BTIME 0x00000800ULL | |
1066 | #define P9_STATS_GEN 0x00001000ULL | |
1067 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
1068 | ||
1069 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
1070 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
1071 | ||
1072 | ||
1073 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, | |
8db21ce7 | 1074 | V9fsStatDotl *v9lstat) |
00ede4c2 SK |
1075 | { |
1076 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
1077 | ||
1078 | v9lstat->st_mode = stbuf->st_mode; | |
1079 | v9lstat->st_nlink = stbuf->st_nlink; | |
1080 | v9lstat->st_uid = stbuf->st_uid; | |
1081 | v9lstat->st_gid = stbuf->st_gid; | |
1082 | v9lstat->st_rdev = stbuf->st_rdev; | |
1083 | v9lstat->st_size = stbuf->st_size; | |
1084 | v9lstat->st_blksize = stbuf->st_blksize; | |
1085 | v9lstat->st_blocks = stbuf->st_blocks; | |
1086 | v9lstat->st_atime_sec = stbuf->st_atime; | |
1087 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
1088 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
1089 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
1090 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
1091 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
1092 | /* Currently we only support BASIC fields in stat */ | |
1093 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
1094 | ||
1095 | stat_to_qid(stbuf, &v9lstat->qid); | |
1096 | } | |
1097 | ||
1f5a89bf AL |
1098 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1099 | { | |
1100 | while (len && *iovcnt) { | |
1101 | if (len < sg->iov_len) { | |
1102 | sg->iov_len -= len; | |
1103 | sg->iov_base += len; | |
1104 | len = 0; | |
1105 | } else { | |
1106 | len -= sg->iov_len; | |
1107 | sg++; | |
1108 | *iovcnt -= 1; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | return sg; | |
1113 | } | |
1114 | ||
1115 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
1116 | { | |
1117 | int i; | |
1118 | int total = 0; | |
1119 | ||
1120 | for (i = 0; i < *cnt; i++) { | |
1121 | if ((total + sg[i].iov_len) > cap) { | |
1122 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
1123 | i++; | |
1124 | break; | |
1125 | } | |
1126 | total += sg[i].iov_len; | |
1127 | } | |
1128 | ||
1129 | *cnt = i; | |
1130 | ||
1131 | return sg; | |
1132 | } | |
1133 | ||
1134 | static void print_sg(struct iovec *sg, int cnt) | |
1135 | { | |
1136 | int i; | |
1137 | ||
1138 | printf("sg[%d]: {", cnt); | |
1139 | for (i = 0; i < cnt; i++) { | |
1140 | if (i) { | |
1141 | printf(", "); | |
1142 | } | |
1143 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1144 | } | |
1145 | printf("}\n"); | |
1146 | } | |
1147 | ||
8cf89e00 AL |
1148 | static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1149 | { | |
1150 | V9fsString str; | |
1151 | v9fs_string_init(&str); | |
1152 | v9fs_string_copy(&str, dst); | |
1153 | v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len); | |
1154 | v9fs_string_free(&str); | |
1155 | } | |
1156 | ||
ff06030f | 1157 | static void v9fs_version(void *opaque) |
9f107513 | 1158 | { |
ff06030f VJ |
1159 | V9fsPDU *pdu = opaque; |
1160 | V9fsState *s = pdu->s; | |
92c1ad03 AL |
1161 | V9fsString version; |
1162 | size_t offset = 7; | |
1163 | ||
5e94c103 | 1164 | pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); |
92c1ad03 | 1165 | |
84151514 MK |
1166 | if (!strcmp(version.data, "9P2000.u")) { |
1167 | s->proto_version = V9FS_PROTO_2000U; | |
1168 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1169 | s->proto_version = V9FS_PROTO_2000L; | |
1170 | } else { | |
92c1ad03 | 1171 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 1172 | } |
92c1ad03 | 1173 | |
5e94c103 | 1174 | offset += pdu_marshal(pdu, offset, "ds", s->msize, &version); |
92c1ad03 AL |
1175 | complete_pdu(s, pdu, offset); |
1176 | ||
1177 | v9fs_string_free(&version); | |
ff06030f | 1178 | return; |
9f107513 AL |
1179 | } |
1180 | ||
ff06030f | 1181 | static void v9fs_attach(void *opaque) |
9f107513 | 1182 | { |
ff06030f VJ |
1183 | V9fsPDU *pdu = opaque; |
1184 | V9fsState *s = pdu->s; | |
955efc47 AL |
1185 | int32_t fid, afid, n_uname; |
1186 | V9fsString uname, aname; | |
1187 | V9fsFidState *fidp; | |
1188 | V9fsQID qid; | |
1189 | size_t offset = 7; | |
1190 | ssize_t err; | |
1191 | ||
1192 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
1193 | ||
1194 | fidp = alloc_fid(s, fid); | |
1195 | if (fidp == NULL) { | |
1196 | err = -EINVAL; | |
1197 | goto out; | |
9f107513 | 1198 | } |
955efc47 AL |
1199 | |
1200 | fidp->uid = n_uname; | |
1201 | ||
1202 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
1203 | err = fid_to_qid(s, fidp, &qid); | |
1204 | if (err) { | |
1205 | err = -EINVAL; | |
1206 | free_fid(s, fid); | |
1207 | goto out; | |
1208 | } | |
1209 | ||
1210 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
1211 | ||
1212 | err = offset; | |
1213 | out: | |
1214 | complete_pdu(s, pdu, err); | |
1215 | v9fs_string_free(&uname); | |
1216 | v9fs_string_free(&aname); | |
9f107513 AL |
1217 | } |
1218 | ||
4da7d3fa AL |
1219 | static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1220 | { | |
1221 | if (err == -1) { | |
1222 | err = -errno; | |
1223 | goto out; | |
1224 | } | |
1225 | ||
1226 | err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); | |
1227 | if (err) { | |
1228 | goto out; | |
1229 | } | |
1230 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); | |
1231 | err = vs->offset; | |
1232 | ||
1233 | out: | |
1234 | complete_pdu(s, vs->pdu, err); | |
1235 | v9fs_stat_free(&vs->v9stat); | |
1236 | qemu_free(vs); | |
1237 | } | |
1238 | ||
ff06030f | 1239 | static void v9fs_stat(void *opaque) |
9f107513 | 1240 | { |
ff06030f VJ |
1241 | V9fsPDU *pdu = opaque; |
1242 | V9fsState *s = pdu->s; | |
4da7d3fa AL |
1243 | int32_t fid; |
1244 | V9fsStatState *vs; | |
1245 | ssize_t err = 0; | |
1246 | ||
1247 | vs = qemu_malloc(sizeof(*vs)); | |
1248 | vs->pdu = pdu; | |
1249 | vs->offset = 7; | |
1250 | ||
1251 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1252 | ||
1253 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1254 | ||
1255 | vs->fidp = lookup_fid(s, fid); | |
1256 | if (vs->fidp == NULL) { | |
1257 | err = -ENOENT; | |
1258 | goto out; | |
9f107513 | 1259 | } |
4da7d3fa AL |
1260 | |
1261 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1262 | v9fs_stat_post_lstat(s, vs, err); | |
1263 | return; | |
1264 | ||
1265 | out: | |
1266 | complete_pdu(s, vs->pdu, err); | |
1267 | v9fs_stat_free(&vs->v9stat); | |
1268 | qemu_free(vs); | |
9f107513 AL |
1269 | } |
1270 | ||
ff06030f | 1271 | static void v9fs_getattr(void *opaque) |
00ede4c2 SK |
1272 | { |
1273 | int32_t fid; | |
8db21ce7 AK |
1274 | size_t offset = 7; |
1275 | ssize_t retval = 0; | |
1276 | struct stat stbuf; | |
00ede4c2 SK |
1277 | V9fsFidState *fidp; |
1278 | uint64_t request_mask; | |
8db21ce7 AK |
1279 | V9fsStatDotl v9stat_dotl; |
1280 | V9fsPDU *pdu = opaque; | |
1281 | V9fsState *s = pdu->s; | |
00ede4c2 | 1282 | |
8db21ce7 | 1283 | pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); |
00ede4c2 SK |
1284 | |
1285 | fidp = lookup_fid(s, fid); | |
1286 | if (fidp == NULL) { | |
8db21ce7 | 1287 | retval = -ENOENT; |
00ede4c2 SK |
1288 | goto out; |
1289 | } | |
8db21ce7 AK |
1290 | /* |
1291 | * Currently we only support BASIC fields in stat, so there is no | |
00ede4c2 SK |
1292 | * need to look at request_mask. |
1293 | */ | |
8db21ce7 AK |
1294 | retval = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1295 | if (retval < 0) { | |
1296 | goto out; | |
1297 | } | |
1298 | stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); | |
1299 | retval = offset; | |
1300 | retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl); | |
00ede4c2 | 1301 | out: |
8db21ce7 | 1302 | complete_pdu(s, pdu, retval); |
00ede4c2 SK |
1303 | } |
1304 | ||
c79ce737 SK |
1305 | /* From Linux kernel code */ |
1306 | #define ATTR_MODE (1 << 0) | |
1307 | #define ATTR_UID (1 << 1) | |
1308 | #define ATTR_GID (1 << 2) | |
1309 | #define ATTR_SIZE (1 << 3) | |
1310 | #define ATTR_ATIME (1 << 4) | |
1311 | #define ATTR_MTIME (1 << 5) | |
1312 | #define ATTR_CTIME (1 << 6) | |
1313 | #define ATTR_MASK 127 | |
1314 | #define ATTR_ATIME_SET (1 << 7) | |
1315 | #define ATTR_MTIME_SET (1 << 8) | |
1316 | ||
65c05f9a | 1317 | static void v9fs_setattr(void *opaque) |
c79ce737 | 1318 | { |
65c05f9a AK |
1319 | int err = 0; |
1320 | int32_t fid; | |
1321 | V9fsFidState *fidp; | |
1322 | size_t offset = 7; | |
1323 | V9fsIattr v9iattr; | |
1324 | V9fsPDU *pdu = opaque; | |
1325 | V9fsState *s = pdu->s; | |
c79ce737 | 1326 | |
65c05f9a | 1327 | pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); |
c79ce737 | 1328 | |
65c05f9a AK |
1329 | fidp = lookup_fid(s, fid); |
1330 | if (fidp == NULL) { | |
1331 | err = -EINVAL; | |
c79ce737 SK |
1332 | goto out; |
1333 | } | |
65c05f9a AK |
1334 | if (v9iattr.valid & ATTR_MODE) { |
1335 | err = v9fs_co_chmod(s, &fidp->path, v9iattr.mode); | |
1336 | if (err < 0) { | |
1337 | goto out; | |
c79ce737 | 1338 | } |
c79ce737 | 1339 | } |
65c05f9a | 1340 | if (v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) { |
c79ce737 | 1341 | struct timespec times[2]; |
65c05f9a AK |
1342 | if (v9iattr.valid & ATTR_ATIME) { |
1343 | if (v9iattr.valid & ATTR_ATIME_SET) { | |
1344 | times[0].tv_sec = v9iattr.atime_sec; | |
1345 | times[0].tv_nsec = v9iattr.atime_nsec; | |
c79ce737 SK |
1346 | } else { |
1347 | times[0].tv_nsec = UTIME_NOW; | |
1348 | } | |
1349 | } else { | |
1350 | times[0].tv_nsec = UTIME_OMIT; | |
1351 | } | |
65c05f9a AK |
1352 | if (v9iattr.valid & ATTR_MTIME) { |
1353 | if (v9iattr.valid & ATTR_MTIME_SET) { | |
1354 | times[1].tv_sec = v9iattr.mtime_sec; | |
1355 | times[1].tv_nsec = v9iattr.mtime_nsec; | |
c79ce737 SK |
1356 | } else { |
1357 | times[1].tv_nsec = UTIME_NOW; | |
1358 | } | |
1359 | } else { | |
1360 | times[1].tv_nsec = UTIME_OMIT; | |
1361 | } | |
65c05f9a AK |
1362 | err = v9fs_co_utimensat(s, &fidp->path, times); |
1363 | if (err < 0) { | |
1364 | goto out; | |
1365 | } | |
c79ce737 | 1366 | } |
65c05f9a AK |
1367 | /* |
1368 | * If the only valid entry in iattr is ctime we can call | |
1369 | * chown(-1,-1) to update the ctime of the file | |
1370 | */ | |
1371 | if ((v9iattr.valid & (ATTR_UID | ATTR_GID)) || | |
1372 | ((v9iattr.valid & ATTR_CTIME) | |
1373 | && !((v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { | |
1374 | if (!(v9iattr.valid & ATTR_UID)) { | |
1375 | v9iattr.uid = -1; | |
1376 | } | |
1377 | if (!(v9iattr.valid & ATTR_GID)) { | |
1378 | v9iattr.gid = -1; | |
1379 | } | |
1380 | err = v9fs_co_chown(s, &fidp->path, v9iattr.uid, | |
1381 | v9iattr.gid); | |
1382 | if (err < 0) { | |
1383 | goto out; | |
1384 | } | |
c79ce737 | 1385 | } |
65c05f9a AK |
1386 | if (v9iattr.valid & (ATTR_SIZE)) { |
1387 | err = v9fs_co_truncate(s, &fidp->path, v9iattr.size); | |
1388 | if (err < 0) { | |
1389 | goto out; | |
1390 | } | |
c79ce737 | 1391 | } |
65c05f9a | 1392 | err = offset; |
c79ce737 | 1393 | out: |
65c05f9a | 1394 | complete_pdu(s, pdu, err); |
c79ce737 SK |
1395 | } |
1396 | ||
ff5e54c9 AL |
1397 | static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1398 | { | |
1399 | complete_pdu(s, vs->pdu, err); | |
1400 | ||
4f8dee2d | 1401 | if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) { |
ff5e54c9 AL |
1402 | for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1403 | v9fs_string_free(&vs->wnames[vs->name_idx]); | |
1404 | } | |
1405 | ||
1406 | qemu_free(vs->wnames); | |
1407 | qemu_free(vs->qids); | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | static void v9fs_walk_marshal(V9fsWalkState *vs) | |
1412 | { | |
1413 | int i; | |
1414 | vs->offset = 7; | |
1415 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames); | |
1416 | ||
1417 | for (i = 0; i < vs->nwnames; i++) { | |
1418 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]); | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1423 | int err) | |
1424 | { | |
1425 | if (err == -1) { | |
1426 | free_fid(s, vs->newfidp->fid); | |
1427 | v9fs_string_free(&vs->path); | |
1428 | err = -ENOENT; | |
1429 | goto out; | |
1430 | } | |
1431 | ||
1432 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1433 | ||
1434 | vs->name_idx++; | |
1435 | if (vs->name_idx < vs->nwnames) { | |
1436 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1437 | vs->wnames[vs->name_idx].data); | |
1438 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1439 | ||
1440 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1441 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1442 | return; | |
1443 | } | |
1444 | ||
1445 | v9fs_string_free(&vs->path); | |
1446 | v9fs_walk_marshal(vs); | |
1447 | err = vs->offset; | |
1448 | out: | |
1449 | v9fs_walk_complete(s, vs, err); | |
1450 | } | |
1451 | ||
1452 | static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1453 | int err) | |
1454 | { | |
1455 | if (err == -1) { | |
1456 | v9fs_string_free(&vs->path); | |
1457 | err = -ENOENT; | |
1458 | goto out; | |
1459 | } | |
1460 | ||
1461 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1462 | vs->name_idx++; | |
1463 | if (vs->name_idx < vs->nwnames) { | |
1464 | ||
1465 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1466 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1467 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1468 | ||
1469 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1470 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1471 | return; | |
1472 | } | |
1473 | ||
1474 | v9fs_string_free(&vs->path); | |
1475 | v9fs_walk_marshal(vs); | |
1476 | err = vs->offset; | |
1477 | out: | |
1478 | v9fs_walk_complete(s, vs, err); | |
1479 | } | |
1480 | ||
ff06030f | 1481 | static void v9fs_walk(void *opaque) |
9f107513 | 1482 | { |
ff06030f VJ |
1483 | V9fsPDU *pdu = opaque; |
1484 | V9fsState *s = pdu->s; | |
ff5e54c9 AL |
1485 | int32_t fid, newfid; |
1486 | V9fsWalkState *vs; | |
1487 | int err = 0; | |
1488 | int i; | |
1489 | ||
1490 | vs = qemu_malloc(sizeof(*vs)); | |
1491 | vs->pdu = pdu; | |
1492 | vs->wnames = NULL; | |
1493 | vs->qids = NULL; | |
1494 | vs->offset = 7; | |
1495 | ||
1496 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid, | |
1497 | &newfid, &vs->nwnames); | |
1498 | ||
4f8dee2d | 1499 | if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) { |
ff5e54c9 AL |
1500 | vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
1501 | ||
1502 | vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); | |
1503 | ||
1504 | for (i = 0; i < vs->nwnames; i++) { | |
1505 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s", | |
1506 | &vs->wnames[i]); | |
1507 | } | |
4f8dee2d HPB |
1508 | } else if (vs->nwnames > P9_MAXWELEM) { |
1509 | err = -EINVAL; | |
1510 | goto out; | |
ff5e54c9 AL |
1511 | } |
1512 | ||
1513 | vs->fidp = lookup_fid(s, fid); | |
1514 | if (vs->fidp == NULL) { | |
1515 | err = -ENOENT; | |
1516 | goto out; | |
1517 | } | |
1518 | ||
1519 | /* FIXME: is this really valid? */ | |
1520 | if (fid == newfid) { | |
1521 | ||
d62dbb51 | 1522 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
ff5e54c9 AL |
1523 | v9fs_string_init(&vs->path); |
1524 | vs->name_idx = 0; | |
1525 | ||
1526 | if (vs->name_idx < vs->nwnames) { | |
1527 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1528 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1529 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1530 | ||
1531 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1532 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1533 | return; | |
1534 | } | |
1535 | } else { | |
1536 | vs->newfidp = alloc_fid(s, newfid); | |
1537 | if (vs->newfidp == NULL) { | |
1538 | err = -EINVAL; | |
1539 | goto out; | |
1540 | } | |
1541 | ||
1542 | vs->newfidp->uid = vs->fidp->uid; | |
1543 | v9fs_string_init(&vs->path); | |
1544 | vs->name_idx = 0; | |
1545 | v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); | |
1546 | ||
1547 | if (vs->name_idx < vs->nwnames) { | |
1548 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1549 | vs->wnames[vs->name_idx].data); | |
1550 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1551 | ||
1552 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1553 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1554 | return; | |
1555 | } | |
9f107513 | 1556 | } |
ff5e54c9 AL |
1557 | |
1558 | v9fs_walk_marshal(vs); | |
1559 | err = vs->offset; | |
1560 | out: | |
1561 | v9fs_walk_complete(s, vs, err); | |
9f107513 AL |
1562 | } |
1563 | ||
5e94c103 MK |
1564 | static int32_t get_iounit(V9fsState *s, V9fsString *name) |
1565 | { | |
1566 | struct statfs stbuf; | |
1567 | int32_t iounit = 0; | |
1568 | ||
1569 | /* | |
1570 | * iounit should be multiples of f_bsize (host filesystem block size | |
1571 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1572 | */ | |
1573 | if (!v9fs_do_statfs(s, name, &stbuf)) { | |
1574 | iounit = stbuf.f_bsize; | |
1575 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1576 | } | |
1577 | ||
1578 | if (!iounit) { | |
1579 | iounit = s->msize - P9_IOHDRSZ; | |
1580 | } | |
1581 | return iounit; | |
1582 | } | |
1583 | ||
a6568fe2 AL |
1584 | static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1585 | { | |
d62dbb51 | 1586 | if (vs->fidp->fs.dir == NULL) { |
a6568fe2 AL |
1587 | err = -errno; |
1588 | goto out; | |
1589 | } | |
d62dbb51 | 1590 | vs->fidp->fid_type = P9_FID_DIR; |
a6568fe2 AL |
1591 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1592 | err = vs->offset; | |
1593 | out: | |
1594 | complete_pdu(s, vs->pdu, err); | |
1595 | qemu_free(vs); | |
1596 | ||
1597 | } | |
1598 | ||
5e94c103 MK |
1599 | static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1600 | { | |
1601 | int err; | |
1602 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); | |
1603 | err = vs->offset; | |
1604 | complete_pdu(s, vs->pdu, err); | |
1605 | qemu_free(vs); | |
1606 | } | |
1607 | ||
a6568fe2 AL |
1608 | static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1609 | { | |
d62dbb51 | 1610 | if (vs->fidp->fs.fd == -1) { |
a6568fe2 AL |
1611 | err = -errno; |
1612 | goto out; | |
1613 | } | |
d62dbb51 | 1614 | vs->fidp->fid_type = P9_FID_FILE; |
5e94c103 MK |
1615 | vs->iounit = get_iounit(s, &vs->fidp->path); |
1616 | v9fs_open_post_getiounit(s, vs); | |
1617 | return; | |
a6568fe2 AL |
1618 | out: |
1619 | complete_pdu(s, vs->pdu, err); | |
1620 | qemu_free(vs); | |
1621 | } | |
1622 | ||
1623 | static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) | |
1624 | { | |
771e9d4c MK |
1625 | int flags; |
1626 | ||
a6568fe2 AL |
1627 | if (err) { |
1628 | err = -errno; | |
1629 | goto out; | |
1630 | } | |
1631 | ||
1632 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1633 | ||
1634 | if (S_ISDIR(vs->stbuf.st_mode)) { | |
d62dbb51 | 1635 | vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
a6568fe2 AL |
1636 | v9fs_open_post_opendir(s, vs, err); |
1637 | } else { | |
771e9d4c | 1638 | if (s->proto_version == V9FS_PROTO_2000L) { |
771e9d4c | 1639 | flags = vs->mode; |
630c2689 | 1640 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
0f8151cb VJ |
1641 | /* Ignore direct disk access hint until the server supports it. */ |
1642 | flags &= ~O_DIRECT; | |
771e9d4c MK |
1643 | } else { |
1644 | flags = omode_to_uflags(vs->mode); | |
1645 | } | |
d62dbb51 | 1646 | vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
a6568fe2 AL |
1647 | v9fs_open_post_open(s, vs, err); |
1648 | } | |
1649 | return; | |
1650 | out: | |
1651 | complete_pdu(s, vs->pdu, err); | |
1652 | qemu_free(vs); | |
9f107513 AL |
1653 | } |
1654 | ||
ff06030f | 1655 | static void v9fs_open(void *opaque) |
a6568fe2 | 1656 | { |
ff06030f VJ |
1657 | V9fsPDU *pdu = opaque; |
1658 | V9fsState *s = pdu->s; | |
a6568fe2 AL |
1659 | int32_t fid; |
1660 | V9fsOpenState *vs; | |
1661 | ssize_t err = 0; | |
1662 | ||
a6568fe2 AL |
1663 | vs = qemu_malloc(sizeof(*vs)); |
1664 | vs->pdu = pdu; | |
1665 | vs->offset = 7; | |
771e9d4c | 1666 | vs->mode = 0; |
a6568fe2 | 1667 | |
771e9d4c MK |
1668 | if (s->proto_version == V9FS_PROTO_2000L) { |
1669 | pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode); | |
1670 | } else { | |
1671 | pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode); | |
1672 | } | |
a6568fe2 AL |
1673 | |
1674 | vs->fidp = lookup_fid(s, fid); | |
1675 | if (vs->fidp == NULL) { | |
1676 | err = -ENOENT; | |
1677 | goto out; | |
1678 | } | |
1679 | ||
d62dbb51 | 1680 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
a6568fe2 AL |
1681 | |
1682 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1683 | ||
1684 | v9fs_open_post_lstat(s, vs, err); | |
1685 | return; | |
1686 | out: | |
1687 | complete_pdu(s, pdu, err); | |
1688 | qemu_free(vs); | |
1689 | } | |
1690 | ||
c1568af5 VJ |
1691 | static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1692 | { | |
1693 | if (err == 0) { | |
1694 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
1695 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1696 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, | |
1d810aeb | 1697 | vs->iounit); |
c1568af5 VJ |
1698 | err = vs->offset; |
1699 | } else { | |
d62dbb51 | 1700 | vs->fidp->fid_type = P9_FID_NONE; |
c1568af5 | 1701 | err = -errno; |
ab03b63d SK |
1702 | if (vs->fidp->fs.fd > 0) { |
1703 | close(vs->fidp->fs.fd); | |
1704 | } | |
c1568af5 VJ |
1705 | } |
1706 | ||
1707 | complete_pdu(s, vs->pdu, err); | |
1708 | v9fs_string_free(&vs->name); | |
1709 | v9fs_string_free(&vs->fullname); | |
1710 | qemu_free(vs); | |
1711 | } | |
1712 | ||
1713 | static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, | |
1714 | int err) | |
1715 | { | |
1716 | if (err) { | |
1717 | err = -errno; | |
1718 | goto out; | |
1719 | } | |
1720 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1721 | ||
1722 | out: | |
1723 | v9fs_post_lcreate(s, vs, err); | |
1724 | } | |
1725 | ||
1726 | static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, | |
1727 | int err) | |
1728 | { | |
d62dbb51 | 1729 | if (vs->fidp->fs.fd == -1) { |
c1568af5 VJ |
1730 | err = -errno; |
1731 | goto out; | |
1732 | } | |
d62dbb51 | 1733 | vs->fidp->fid_type = P9_FID_FILE; |
c1568af5 VJ |
1734 | vs->iounit = get_iounit(s, &vs->fullname); |
1735 | v9fs_lcreate_post_get_iounit(s, vs, err); | |
1736 | return; | |
1737 | ||
1738 | out: | |
1739 | v9fs_post_lcreate(s, vs, err); | |
1740 | } | |
1741 | ||
ff06030f | 1742 | static void v9fs_lcreate(void *opaque) |
c1568af5 | 1743 | { |
ff06030f VJ |
1744 | V9fsPDU *pdu = opaque; |
1745 | V9fsState *s = pdu->s; | |
c1568af5 VJ |
1746 | int32_t dfid, flags, mode; |
1747 | gid_t gid; | |
1748 | V9fsLcreateState *vs; | |
1749 | ssize_t err = 0; | |
1750 | ||
1751 | vs = qemu_malloc(sizeof(*vs)); | |
1752 | vs->pdu = pdu; | |
1753 | vs->offset = 7; | |
1754 | ||
1755 | v9fs_string_init(&vs->fullname); | |
1756 | ||
1757 | pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags, | |
1758 | &mode, &gid); | |
1759 | ||
1760 | vs->fidp = lookup_fid(s, dfid); | |
1761 | if (vs->fidp == NULL) { | |
1762 | err = -ENOENT; | |
1763 | goto out; | |
1764 | } | |
1765 | ||
1766 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
1767 | vs->name.data); | |
1768 | ||
0f8151cb VJ |
1769 | /* Ignore direct disk access hint until the server supports it. */ |
1770 | flags &= ~O_DIRECT; | |
1771 | ||
d62dbb51 | 1772 | vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
c1568af5 VJ |
1773 | gid, flags, mode); |
1774 | v9fs_lcreate_post_do_open2(s, vs, err); | |
1775 | return; | |
1776 | ||
1777 | out: | |
1778 | complete_pdu(s, vs->pdu, err); | |
1779 | v9fs_string_free(&vs->name); | |
1780 | qemu_free(vs); | |
1781 | } | |
1782 | ||
b41e95d3 VJ |
1783 | static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err) |
1784 | { | |
1785 | if (err == -1) { | |
1786 | err = -errno; | |
1787 | } | |
1788 | complete_pdu(s, pdu, err); | |
1789 | } | |
1790 | ||
ff06030f | 1791 | static void v9fs_fsync(void *opaque) |
b41e95d3 | 1792 | { |
ff06030f VJ |
1793 | V9fsPDU *pdu = opaque; |
1794 | V9fsState *s = pdu->s; | |
b41e95d3 VJ |
1795 | int32_t fid; |
1796 | size_t offset = 7; | |
1797 | V9fsFidState *fidp; | |
49594973 | 1798 | int datasync; |
b41e95d3 VJ |
1799 | int err; |
1800 | ||
49594973 | 1801 | pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); |
b41e95d3 VJ |
1802 | fidp = lookup_fid(s, fid); |
1803 | if (fidp == NULL) { | |
1804 | err = -ENOENT; | |
1805 | v9fs_post_do_fsync(s, pdu, err); | |
1806 | return; | |
1807 | } | |
49594973 | 1808 | err = v9fs_do_fsync(s, fidp->fs.fd, datasync); |
b41e95d3 VJ |
1809 | v9fs_post_do_fsync(s, pdu, err); |
1810 | } | |
1811 | ||
ff06030f | 1812 | static void v9fs_clunk(void *opaque) |
a6568fe2 | 1813 | { |
ff06030f VJ |
1814 | V9fsPDU *pdu = opaque; |
1815 | V9fsState *s = pdu->s; | |
bbd5697b AL |
1816 | int32_t fid; |
1817 | size_t offset = 7; | |
1818 | int err; | |
1819 | ||
1820 | pdu_unmarshal(pdu, offset, "d", &fid); | |
1821 | ||
1822 | err = free_fid(s, fid); | |
1823 | if (err < 0) { | |
1824 | goto out; | |
a6568fe2 | 1825 | } |
bbd5697b AL |
1826 | |
1827 | offset = 7; | |
1828 | err = offset; | |
1829 | out: | |
1830 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1831 | } |
1832 | ||
a9231555 AL |
1833 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1834 | ||
1835 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1836 | { | |
1837 | if (err) { | |
1838 | goto out; | |
1839 | } | |
a9231555 AL |
1840 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); |
1841 | vs->offset += vs->count; | |
1842 | err = vs->offset; | |
1843 | out: | |
1844 | complete_pdu(s, vs->pdu, err); | |
7a5ca31e VJ |
1845 | v9fs_stat_free(&vs->v9stat); |
1846 | v9fs_string_free(&vs->name); | |
a9231555 AL |
1847 | qemu_free(vs); |
1848 | return; | |
1849 | } | |
1850 | ||
1851 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1852 | ssize_t err) | |
1853 | { | |
1854 | if (err) { | |
1855 | err = -errno; | |
1856 | goto out; | |
1857 | } | |
1858 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1859 | if (err) { | |
1860 | goto out; | |
1861 | } | |
1862 | ||
1863 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1864 | &vs->v9stat); | |
1865 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1866 | ((vs->count + vs->len) > vs->max_count)) { | |
d62dbb51 | 1867 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1868 | v9fs_read_post_seekdir(s, vs, err); |
1869 | return; | |
1870 | } | |
1871 | vs->count += vs->len; | |
1872 | v9fs_stat_free(&vs->v9stat); | |
1873 | v9fs_string_free(&vs->name); | |
1874 | vs->dir_pos = vs->dent->d_off; | |
5e4eaa79 | 1875 | v9fs_co_readdir(s, vs->fidp, &vs->dent); |
a9231555 AL |
1876 | v9fs_read_post_readdir(s, vs, err); |
1877 | return; | |
1878 | out: | |
d62dbb51 | 1879 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1880 | v9fs_read_post_seekdir(s, vs, err); |
1881 | return; | |
1882 | ||
1883 | } | |
1884 | ||
1885 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1886 | { | |
1887 | if (vs->dent) { | |
1888 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1889 | v9fs_string_init(&vs->name); | |
1890 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1891 | vs->dent->d_name); | |
1892 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1893 | v9fs_read_post_dir_lstat(s, vs, err); | |
1894 | return; | |
1895 | } | |
1896 | ||
1897 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1898 | vs->offset += vs->count; | |
1899 | err = vs->offset; | |
1900 | complete_pdu(s, vs->pdu, err); | |
1901 | qemu_free(vs); | |
1902 | return; | |
1903 | } | |
1904 | ||
1905 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1906 | { | |
5e4eaa79 | 1907 | v9fs_co_readdir(s, vs->fidp, &vs->dent); |
a9231555 AL |
1908 | v9fs_read_post_readdir(s, vs, err); |
1909 | return; | |
1910 | } | |
1911 | ||
1912 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1913 | ssize_t err) | |
1914 | { | |
d62dbb51 | 1915 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
a9231555 AL |
1916 | v9fs_read_post_telldir(s, vs, err); |
1917 | return; | |
1918 | } | |
1919 | ||
56d15a53 | 1920 | static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
a9231555 AL |
1921 | { |
1922 | if (err < 0) { | |
1923 | /* IO error return the error */ | |
1924 | err = -errno; | |
1925 | goto out; | |
1926 | } | |
1927 | vs->total += vs->len; | |
1928 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1929 | if (vs->total < vs->count && vs->len > 0) { | |
1930 | do { | |
1931 | if (0) { | |
1932 | print_sg(vs->sg, vs->cnt); | |
1933 | } | |
56d15a53 SG |
1934 | vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
1935 | vs->off); | |
1936 | if (vs->len > 0) { | |
1937 | vs->off += vs->len; | |
1938 | } | |
a9231555 AL |
1939 | } while (vs->len == -1 && errno == EINTR); |
1940 | if (vs->len == -1) { | |
1941 | err = -errno; | |
1942 | } | |
56d15a53 | 1943 | v9fs_read_post_preadv(s, vs, err); |
a9231555 AL |
1944 | return; |
1945 | } | |
1946 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1947 | vs->offset += vs->count; | |
1948 | err = vs->offset; | |
1949 | ||
1950 | out: | |
1951 | complete_pdu(s, vs->pdu, err); | |
1952 | qemu_free(vs); | |
1953 | } | |
1954 | ||
fa32ef88 AK |
1955 | static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
1956 | { | |
1957 | ssize_t err = 0; | |
1958 | int read_count; | |
1959 | int64_t xattr_len; | |
1960 | ||
1961 | xattr_len = vs->fidp->fs.xattr.len; | |
1962 | read_count = xattr_len - vs->off; | |
1963 | if (read_count > vs->count) { | |
1964 | read_count = vs->count; | |
1965 | } else if (read_count < 0) { | |
1966 | /* | |
1967 | * read beyond XATTR value | |
1968 | */ | |
1969 | read_count = 0; | |
1970 | } | |
1971 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count); | |
1972 | vs->offset += pdu_pack(vs->pdu, vs->offset, | |
1973 | ((char *)vs->fidp->fs.xattr.value) + vs->off, | |
1974 | read_count); | |
1975 | err = vs->offset; | |
1976 | complete_pdu(s, vs->pdu, err); | |
1977 | qemu_free(vs); | |
1978 | } | |
1979 | ||
ff06030f | 1980 | static void v9fs_read(void *opaque) |
9f107513 | 1981 | { |
ff06030f VJ |
1982 | V9fsPDU *pdu = opaque; |
1983 | V9fsState *s = pdu->s; | |
a9231555 AL |
1984 | int32_t fid; |
1985 | V9fsReadState *vs; | |
1986 | ssize_t err = 0; | |
1987 | ||
1988 | vs = qemu_malloc(sizeof(*vs)); | |
1989 | vs->pdu = pdu; | |
1990 | vs->offset = 7; | |
1991 | vs->total = 0; | |
1992 | vs->len = 0; | |
1993 | vs->count = 0; | |
1994 | ||
1995 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
1996 | ||
1997 | vs->fidp = lookup_fid(s, fid); | |
1998 | if (vs->fidp == NULL) { | |
1999 | err = -EINVAL; | |
2000 | goto out; | |
2001 | } | |
2002 | ||
fa32ef88 | 2003 | if (vs->fidp->fid_type == P9_FID_DIR) { |
a9231555 AL |
2004 | vs->max_count = vs->count; |
2005 | vs->count = 0; | |
2006 | if (vs->off == 0) { | |
d62dbb51 | 2007 | v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
a9231555 AL |
2008 | } |
2009 | v9fs_read_post_rewinddir(s, vs, err); | |
2010 | return; | |
fa32ef88 | 2011 | } else if (vs->fidp->fid_type == P9_FID_FILE) { |
a9231555 AL |
2012 | vs->sg = vs->iov; |
2013 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
56d15a53 SG |
2014 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2015 | if (vs->total <= vs->count) { | |
2016 | vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, | |
2017 | vs->off); | |
2018 | if (vs->len > 0) { | |
2019 | vs->off += vs->len; | |
2020 | } | |
2021 | err = vs->len; | |
2022 | v9fs_read_post_preadv(s, vs, err); | |
2023 | } | |
a9231555 | 2024 | return; |
fa32ef88 AK |
2025 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2026 | v9fs_xattr_read(s, vs); | |
2027 | return; | |
a9231555 AL |
2028 | } else { |
2029 | err = -EINVAL; | |
9f107513 | 2030 | } |
a9231555 AL |
2031 | out: |
2032 | complete_pdu(s, pdu, err); | |
2033 | qemu_free(vs); | |
9f107513 AL |
2034 | } |
2035 | ||
5e4eaa79 | 2036 | static size_t v9fs_readdir_data_size(V9fsString *name) |
c18e2f94 | 2037 | { |
5e4eaa79 AK |
2038 | /* |
2039 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
2040 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
2041 | */ | |
2042 | return 24 + v9fs_string_size(name); | |
c18e2f94 SK |
2043 | } |
2044 | ||
5e4eaa79 AK |
2045 | static int v9fs_do_readdir(V9fsState *s, V9fsPDU *pdu, |
2046 | V9fsFidState *fidp, int32_t max_count) | |
c18e2f94 | 2047 | { |
c18e2f94 | 2048 | size_t size; |
5e4eaa79 AK |
2049 | V9fsQID qid; |
2050 | V9fsString name; | |
2051 | int len, err = 0; | |
2052 | int32_t count = 0; | |
2053 | off_t saved_dir_pos; | |
2054 | struct dirent *dent; | |
c18e2f94 | 2055 | |
5e4eaa79 AK |
2056 | /* save the directory position */ |
2057 | saved_dir_pos = v9fs_co_telldir(s, fidp); | |
2058 | if (saved_dir_pos < 0) { | |
2059 | return saved_dir_pos; | |
2060 | } | |
2061 | while (1) { | |
2062 | err = v9fs_co_readdir(s, fidp, &dent); | |
2063 | if (err || !dent) { | |
2064 | break; | |
2065 | } | |
2066 | v9fs_string_init(&name); | |
2067 | v9fs_string_sprintf(&name, "%s", dent->d_name); | |
2068 | if ((count + v9fs_readdir_data_size(&name)) > max_count) { | |
c18e2f94 | 2069 | /* Ran out of buffer. Set dir back to old position and return */ |
5e4eaa79 AK |
2070 | v9fs_co_seekdir(s, fidp, saved_dir_pos); |
2071 | v9fs_string_free(&name); | |
2072 | return count; | |
c18e2f94 | 2073 | } |
5e4eaa79 AK |
2074 | /* |
2075 | * Fill up just the path field of qid because the client uses | |
c18e2f94 SK |
2076 | * only that. To fill the entire qid structure we will have |
2077 | * to stat each dirent found, which is expensive | |
2078 | */ | |
5e4eaa79 AK |
2079 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
2080 | memcpy(&qid.path, &dent->d_ino, size); | |
c18e2f94 | 2081 | /* Fill the other fields with dummy values */ |
5e4eaa79 AK |
2082 | qid.type = 0; |
2083 | qid.version = 0; | |
c18e2f94 | 2084 | |
5e4eaa79 AK |
2085 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
2086 | len = pdu_marshal(pdu, 11 + count, "Qqbs", | |
2087 | &qid, dent->d_off, | |
2088 | dent->d_type, &name); | |
2089 | count += len; | |
2090 | v9fs_string_free(&name); | |
2091 | saved_dir_pos = dent->d_off; | |
2092 | } | |
2093 | if (err < 0) { | |
2094 | return err; | |
2095 | } | |
2096 | return count; | |
c18e2f94 SK |
2097 | } |
2098 | ||
ff06030f | 2099 | static void v9fs_readdir(void *opaque) |
c18e2f94 SK |
2100 | { |
2101 | int32_t fid; | |
5e4eaa79 AK |
2102 | V9fsFidState *fidp; |
2103 | ssize_t retval = 0; | |
c18e2f94 | 2104 | size_t offset = 7; |
5e4eaa79 AK |
2105 | int64_t initial_offset; |
2106 | int32_t count, max_count; | |
2107 | V9fsPDU *pdu = opaque; | |
2108 | V9fsState *s = pdu->s; | |
c18e2f94 | 2109 | |
5e4eaa79 | 2110 | pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count); |
c18e2f94 | 2111 | |
5e4eaa79 AK |
2112 | fidp = lookup_fid(s, fid); |
2113 | if (fidp == NULL || !fidp->fs.dir) { | |
2114 | retval = -EINVAL; | |
c18e2f94 SK |
2115 | goto out; |
2116 | } | |
5e4eaa79 AK |
2117 | if (initial_offset == 0) { |
2118 | v9fs_co_rewinddir(s, fidp); | |
c18e2f94 | 2119 | } else { |
5e4eaa79 | 2120 | v9fs_co_seekdir(s, fidp, initial_offset); |
c18e2f94 | 2121 | } |
5e4eaa79 AK |
2122 | count = v9fs_do_readdir(s, pdu, fidp, max_count); |
2123 | if (count < 0) { | |
2124 | retval = count; | |
2125 | goto out; | |
2126 | } | |
2127 | retval = offset; | |
2128 | retval += pdu_marshal(pdu, offset, "d", count); | |
2129 | retval += count; | |
c18e2f94 | 2130 | out: |
5e4eaa79 | 2131 | complete_pdu(s, pdu, retval); |
c18e2f94 SK |
2132 | } |
2133 | ||
56d15a53 | 2134 | static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs, |
8449360c AL |
2135 | ssize_t err) |
2136 | { | |
2137 | if (err < 0) { | |
2138 | /* IO error return the error */ | |
2139 | err = -errno; | |
2140 | goto out; | |
2141 | } | |
2142 | vs->total += vs->len; | |
2143 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
2144 | if (vs->total < vs->count && vs->len > 0) { | |
2145 | do { | |
2146 | if (0) { | |
2147 | print_sg(vs->sg, vs->cnt); | |
2148 | } | |
56d15a53 SG |
2149 | vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2150 | vs->off); | |
2151 | if (vs->len > 0) { | |
2152 | vs->off += vs->len; | |
2153 | } | |
8449360c AL |
2154 | } while (vs->len == -1 && errno == EINTR); |
2155 | if (vs->len == -1) { | |
2156 | err = -errno; | |
2157 | } | |
56d15a53 | 2158 | v9fs_write_post_pwritev(s, vs, err); |
8449360c AL |
2159 | return; |
2160 | } | |
2161 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
8449360c AL |
2162 | err = vs->offset; |
2163 | out: | |
2164 | complete_pdu(s, vs->pdu, err); | |
2165 | qemu_free(vs); | |
2166 | } | |
2167 | ||
10b468bd AK |
2168 | static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
2169 | { | |
2170 | int i, to_copy; | |
2171 | ssize_t err = 0; | |
2172 | int write_count; | |
2173 | int64_t xattr_len; | |
2174 | ||
2175 | xattr_len = vs->fidp->fs.xattr.len; | |
2176 | write_count = xattr_len - vs->off; | |
2177 | if (write_count > vs->count) { | |
2178 | write_count = vs->count; | |
2179 | } else if (write_count < 0) { | |
2180 | /* | |
2181 | * write beyond XATTR value len specified in | |
2182 | * xattrcreate | |
2183 | */ | |
2184 | err = -ENOSPC; | |
2185 | goto out; | |
2186 | } | |
2187 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count); | |
2188 | err = vs->offset; | |
2189 | vs->fidp->fs.xattr.copied_len += write_count; | |
2190 | /* | |
2191 | * Now copy the content from sg list | |
2192 | */ | |
2193 | for (i = 0; i < vs->cnt; i++) { | |
2194 | if (write_count > vs->sg[i].iov_len) { | |
2195 | to_copy = vs->sg[i].iov_len; | |
2196 | } else { | |
2197 | to_copy = write_count; | |
2198 | } | |
2199 | memcpy((char *)vs->fidp->fs.xattr.value + vs->off, | |
2200 | vs->sg[i].iov_base, to_copy); | |
2201 | /* updating vs->off since we are not using below */ | |
2202 | vs->off += to_copy; | |
2203 | write_count -= to_copy; | |
2204 | } | |
2205 | out: | |
2206 | complete_pdu(s, vs->pdu, err); | |
2207 | qemu_free(vs); | |
2208 | } | |
2209 | ||
ff06030f | 2210 | static void v9fs_write(void *opaque) |
9f107513 | 2211 | { |
ff06030f VJ |
2212 | V9fsPDU *pdu = opaque; |
2213 | V9fsState *s = pdu->s; | |
8449360c AL |
2214 | int32_t fid; |
2215 | V9fsWriteState *vs; | |
2216 | ssize_t err; | |
2217 | ||
2218 | vs = qemu_malloc(sizeof(*vs)); | |
2219 | ||
2220 | vs->pdu = pdu; | |
2221 | vs->offset = 7; | |
2222 | vs->sg = vs->iov; | |
2223 | vs->total = 0; | |
2224 | vs->len = 0; | |
2225 | ||
2226 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
10b468bd | 2227 | vs->sg, &vs->cnt); |
8449360c AL |
2228 | |
2229 | vs->fidp = lookup_fid(s, fid); | |
2230 | if (vs->fidp == NULL) { | |
2231 | err = -EINVAL; | |
2232 | goto out; | |
9f107513 | 2233 | } |
8449360c | 2234 | |
10b468bd AK |
2235 | if (vs->fidp->fid_type == P9_FID_FILE) { |
2236 | if (vs->fidp->fs.fd == -1) { | |
2237 | err = -EINVAL; | |
2238 | goto out; | |
2239 | } | |
2240 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { | |
2241 | /* | |
2242 | * setxattr operation | |
2243 | */ | |
2244 | v9fs_xattr_write(s, vs); | |
2245 | return; | |
2246 | } else { | |
8449360c AL |
2247 | err = -EINVAL; |
2248 | goto out; | |
2249 | } | |
56d15a53 SG |
2250 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2251 | if (vs->total <= vs->count) { | |
2252 | vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off); | |
2253 | if (vs->len > 0) { | |
2254 | vs->off += vs->len; | |
2255 | } | |
2256 | err = vs->len; | |
2257 | v9fs_write_post_pwritev(s, vs, err); | |
2258 | } | |
8449360c | 2259 | return; |
8449360c AL |
2260 | out: |
2261 | complete_pdu(s, vs->pdu, err); | |
2262 | qemu_free(vs); | |
9f107513 AL |
2263 | } |
2264 | ||
5e94c103 | 2265 | static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
c494dd6f | 2266 | { |
5e94c103 MK |
2267 | int err; |
2268 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
2269 | stat_to_qid(&vs->stbuf, &vs->qid); | |
c494dd6f | 2270 | |
5e94c103 MK |
2271 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); |
2272 | err = vs->offset; | |
c494dd6f | 2273 | |
5e94c103 MK |
2274 | complete_pdu(s, vs->pdu, err); |
2275 | v9fs_string_free(&vs->name); | |
2276 | v9fs_string_free(&vs->extension); | |
2277 | v9fs_string_free(&vs->fullname); | |
2278 | qemu_free(vs); | |
2279 | } | |
2280 | ||
2281 | static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) | |
2282 | { | |
2283 | if (err == 0) { | |
2284 | vs->iounit = get_iounit(s, &vs->fidp->path); | |
2285 | v9fs_create_post_getiounit(s, vs); | |
2286 | return; | |
c494dd6f AL |
2287 | } |
2288 | ||
2289 | complete_pdu(s, vs->pdu, err); | |
2290 | v9fs_string_free(&vs->name); | |
2291 | v9fs_string_free(&vs->extension); | |
2292 | v9fs_string_free(&vs->fullname); | |
2293 | qemu_free(vs); | |
2294 | } | |
2295 | ||
2296 | static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) | |
2297 | { | |
2298 | if (err) { | |
2299 | err = -errno; | |
2300 | } | |
2301 | v9fs_post_create(s, vs, err); | |
2302 | } | |
2303 | ||
2304 | static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, | |
2305 | int err) | |
2306 | { | |
d62dbb51 | 2307 | if (!vs->fidp->fs.dir) { |
c494dd6f AL |
2308 | err = -errno; |
2309 | } | |
d62dbb51 | 2310 | vs->fidp->fid_type = P9_FID_DIR; |
c494dd6f AL |
2311 | v9fs_post_create(s, vs, err); |
2312 | } | |
2313 | ||
2314 | static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, | |
2315 | int err) | |
2316 | { | |
2317 | if (err) { | |
2318 | err = -errno; | |
2319 | goto out; | |
2320 | } | |
2321 | ||
d62dbb51 | 2322 | vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
c494dd6f AL |
2323 | v9fs_create_post_opendir(s, vs, err); |
2324 | return; | |
2325 | ||
2326 | out: | |
2327 | v9fs_post_create(s, vs, err); | |
2328 | } | |
2329 | ||
2330 | static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) | |
2331 | { | |
2332 | if (err) { | |
2333 | err = -errno; | |
2334 | goto out; | |
2335 | } | |
2336 | ||
2337 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2338 | v9fs_create_post_dir_lstat(s, vs, err); | |
2339 | return; | |
2340 | ||
2341 | out: | |
2342 | v9fs_post_create(s, vs, err); | |
2343 | } | |
2344 | ||
c494dd6f AL |
2345 | static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2346 | { | |
2347 | if (err) { | |
d62dbb51 AK |
2348 | vs->fidp->fid_type = P9_FID_NONE; |
2349 | close(vs->fidp->fs.fd); | |
c494dd6f AL |
2350 | err = -errno; |
2351 | } | |
c494dd6f AL |
2352 | v9fs_post_create(s, vs, err); |
2353 | return; | |
2354 | } | |
2355 | ||
2356 | static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) | |
2357 | { | |
d62dbb51 | 2358 | if (vs->fidp->fs.fd == -1) { |
c494dd6f AL |
2359 | err = -errno; |
2360 | goto out; | |
2361 | } | |
d62dbb51 AK |
2362 | vs->fidp->fid_type = P9_FID_FILE; |
2363 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
c494dd6f AL |
2364 | v9fs_create_post_fstat(s, vs, err); |
2365 | ||
2366 | return; | |
2367 | ||
2368 | out: | |
2369 | v9fs_post_create(s, vs, err); | |
2370 | ||
2371 | } | |
2372 | ||
2373 | static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) | |
2374 | { | |
2375 | ||
2376 | if (err == 0 || errno != ENOENT) { | |
2377 | err = -errno; | |
2378 | goto out; | |
2379 | } | |
2380 | ||
2381 | if (vs->perm & P9_STAT_MODE_DIR) { | |
b67592ea MK |
2382 | err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777, |
2383 | vs->fidp->uid, -1); | |
c494dd6f AL |
2384 | v9fs_create_post_mkdir(s, vs, err); |
2385 | } else if (vs->perm & P9_STAT_MODE_SYMLINK) { | |
08c60fc9 VJ |
2386 | err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2387 | vs->fullname.data, -1); | |
c494dd6f AL |
2388 | v9fs_create_post_perms(s, vs, err); |
2389 | } else if (vs->perm & P9_STAT_MODE_LINK) { | |
2390 | int32_t nfid = atoi(vs->extension.data); | |
2391 | V9fsFidState *nfidp = lookup_fid(s, nfid); | |
2392 | if (nfidp == NULL) { | |
2393 | err = -errno; | |
2394 | v9fs_post_create(s, vs, err); | |
2395 | } | |
2396 | err = v9fs_do_link(s, &nfidp->path, &vs->fullname); | |
2397 | v9fs_create_post_perms(s, vs, err); | |
2398 | } else if (vs->perm & P9_STAT_MODE_DEVICE) { | |
2399 | char ctype; | |
2400 | uint32_t major, minor; | |
2401 | mode_t nmode = 0; | |
2402 | ||
2403 | if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, | |
2404 | &minor) != 3) { | |
2405 | err = -errno; | |
2406 | v9fs_post_create(s, vs, err); | |
2407 | } | |
2408 | ||
2409 | switch (ctype) { | |
2410 | case 'c': | |
2411 | nmode = S_IFCHR; | |
2412 | break; | |
2413 | case 'b': | |
2414 | nmode = S_IFBLK; | |
2415 | break; | |
2416 | default: | |
2417 | err = -EIO; | |
2418 | v9fs_post_create(s, vs, err); | |
2419 | } | |
2420 | ||
2421 | nmode |= vs->perm & 0777; | |
5268cecc MK |
2422 | err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2423 | makedev(major, minor), vs->fidp->uid, -1); | |
c494dd6f AL |
2424 | v9fs_create_post_perms(s, vs, err); |
2425 | } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { | |
5268cecc MK |
2426 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777), |
2427 | 0, vs->fidp->uid, -1); | |
c494dd6f AL |
2428 | v9fs_post_create(s, vs, err); |
2429 | } else if (vs->perm & P9_STAT_MODE_SOCKET) { | |
5268cecc MK |
2430 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777), |
2431 | 0, vs->fidp->uid, -1); | |
63729c36 | 2432 | v9fs_post_create(s, vs, err); |
c494dd6f | 2433 | } else { |
d62dbb51 | 2434 | vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
c1568af5 VJ |
2435 | -1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm); |
2436 | ||
c494dd6f AL |
2437 | v9fs_create_post_open2(s, vs, err); |
2438 | } | |
2439 | ||
2440 | return; | |
2441 | ||
2442 | out: | |
2443 | v9fs_post_create(s, vs, err); | |
2444 | } | |
2445 | ||
ff06030f | 2446 | static void v9fs_create(void *opaque) |
9f107513 | 2447 | { |
ff06030f VJ |
2448 | V9fsPDU *pdu = opaque; |
2449 | V9fsState *s = pdu->s; | |
c494dd6f AL |
2450 | int32_t fid; |
2451 | V9fsCreateState *vs; | |
2452 | int err = 0; | |
2453 | ||
2454 | vs = qemu_malloc(sizeof(*vs)); | |
2455 | vs->pdu = pdu; | |
2456 | vs->offset = 7; | |
2457 | ||
2458 | v9fs_string_init(&vs->fullname); | |
2459 | ||
2460 | pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name, | |
2461 | &vs->perm, &vs->mode, &vs->extension); | |
2462 | ||
2463 | vs->fidp = lookup_fid(s, fid); | |
2464 | if (vs->fidp == NULL) { | |
2465 | err = -EINVAL; | |
2466 | goto out; | |
9f107513 | 2467 | } |
c494dd6f AL |
2468 | |
2469 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
2470 | vs->name.data); | |
2471 | ||
2472 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2473 | v9fs_create_post_lstat(s, vs, err); | |
2474 | return; | |
2475 | ||
2476 | out: | |
2477 | complete_pdu(s, vs->pdu, err); | |
2478 | v9fs_string_free(&vs->name); | |
2479 | v9fs_string_free(&vs->extension); | |
2480 | qemu_free(vs); | |
9f107513 AL |
2481 | } |
2482 | ||
08c60fc9 VJ |
2483 | static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2484 | { | |
2485 | if (err == 0) { | |
2486 | stat_to_qid(&vs->stbuf, &vs->qid); | |
2487 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
2488 | err = vs->offset; | |
2489 | } else { | |
2490 | err = -errno; | |
2491 | } | |
2492 | complete_pdu(s, vs->pdu, err); | |
2493 | v9fs_string_free(&vs->name); | |
2494 | v9fs_string_free(&vs->symname); | |
2495 | v9fs_string_free(&vs->fullname); | |
2496 | qemu_free(vs); | |
2497 | } | |
2498 | ||
2499 | static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, | |
2500 | int err) | |
2501 | { | |
2502 | if (err) { | |
2503 | goto out; | |
2504 | } | |
2505 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2506 | out: | |
2507 | v9fs_post_symlink(s, vs, err); | |
2508 | } | |
2509 | ||
ff06030f | 2510 | static void v9fs_symlink(void *opaque) |
08c60fc9 | 2511 | { |
ff06030f VJ |
2512 | V9fsPDU *pdu = opaque; |
2513 | V9fsState *s = pdu->s; | |
08c60fc9 VJ |
2514 | int32_t dfid; |
2515 | V9fsSymlinkState *vs; | |
2516 | int err = 0; | |
2517 | gid_t gid; | |
2518 | ||
2519 | vs = qemu_malloc(sizeof(*vs)); | |
2520 | vs->pdu = pdu; | |
2521 | vs->offset = 7; | |
2522 | ||
2523 | v9fs_string_init(&vs->fullname); | |
2524 | ||
2525 | pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name, | |
2526 | &vs->symname, &gid); | |
2527 | ||
2528 | vs->dfidp = lookup_fid(s, dfid); | |
2529 | if (vs->dfidp == NULL) { | |
2530 | err = -EINVAL; | |
2531 | goto out; | |
2532 | } | |
2533 | ||
2534 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data, | |
2535 | vs->name.data); | |
2536 | err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, | |
2537 | vs->fullname.data, gid); | |
2538 | v9fs_symlink_post_do_symlink(s, vs, err); | |
2539 | return; | |
2540 | ||
2541 | out: | |
2542 | complete_pdu(s, vs->pdu, err); | |
2543 | v9fs_string_free(&vs->name); | |
2544 | v9fs_string_free(&vs->symname); | |
2545 | qemu_free(vs); | |
2546 | } | |
2547 | ||
ff06030f | 2548 | static void v9fs_flush(void *opaque) |
9f107513 | 2549 | { |
ff06030f VJ |
2550 | V9fsPDU *pdu = opaque; |
2551 | V9fsState *s = pdu->s; | |
9c5e9d89 AL |
2552 | /* A nop call with no return */ |
2553 | complete_pdu(s, pdu, 7); | |
ff06030f | 2554 | return; |
9f107513 AL |
2555 | } |
2556 | ||
ff06030f | 2557 | static void v9fs_link(void *opaque) |
b2c224be | 2558 | { |
ff06030f VJ |
2559 | V9fsPDU *pdu = opaque; |
2560 | V9fsState *s = pdu->s; | |
b2c224be VJ |
2561 | int32_t dfid, oldfid; |
2562 | V9fsFidState *dfidp, *oldfidp; | |
2563 | V9fsString name, fullname; | |
2564 | size_t offset = 7; | |
2565 | int err = 0; | |
2566 | ||
2567 | v9fs_string_init(&fullname); | |
2568 | ||
2569 | pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2570 | ||
2571 | dfidp = lookup_fid(s, dfid); | |
2572 | if (dfidp == NULL) { | |
2573 | err = -errno; | |
2574 | goto out; | |
2575 | } | |
2576 | ||
2577 | oldfidp = lookup_fid(s, oldfid); | |
2578 | if (oldfidp == NULL) { | |
2579 | err = -errno; | |
2580 | goto out; | |
2581 | } | |
2582 | ||
2583 | v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data); | |
2584 | err = offset; | |
2585 | err = v9fs_do_link(s, &oldfidp->path, &fullname); | |
2586 | if (err) { | |
2587 | err = -errno; | |
2588 | } | |
2589 | v9fs_string_free(&fullname); | |
2590 | ||
2591 | out: | |
2592 | v9fs_string_free(&name); | |
2593 | complete_pdu(s, pdu, err); | |
2594 | } | |
2595 | ||
5bae1900 AL |
2596 | static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
2597 | int err) | |
2598 | { | |
5bae1900 | 2599 | if (err < 0) { |
926487b7 SK |
2600 | err = -errno; |
2601 | } else { | |
2602 | err = vs->offset; | |
5bae1900 AL |
2603 | } |
2604 | ||
926487b7 SK |
2605 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
2606 | free_fid(s, vs->fidp->fid); | |
2607 | ||
5bae1900 AL |
2608 | complete_pdu(s, vs->pdu, err); |
2609 | qemu_free(vs); | |
2610 | } | |
2611 | ||
ff06030f | 2612 | static void v9fs_remove(void *opaque) |
9f107513 | 2613 | { |
ff06030f VJ |
2614 | V9fsPDU *pdu = opaque; |
2615 | V9fsState *s = pdu->s; | |
5bae1900 AL |
2616 | int32_t fid; |
2617 | V9fsRemoveState *vs; | |
2618 | int err = 0; | |
2619 | ||
2620 | vs = qemu_malloc(sizeof(*vs)); | |
2621 | vs->pdu = pdu; | |
2622 | vs->offset = 7; | |
2623 | ||
2624 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
2625 | ||
2626 | vs->fidp = lookup_fid(s, fid); | |
2627 | if (vs->fidp == NULL) { | |
2628 | err = -EINVAL; | |
2629 | goto out; | |
9f107513 | 2630 | } |
5bae1900 AL |
2631 | |
2632 | err = v9fs_do_remove(s, &vs->fidp->path); | |
2633 | v9fs_remove_post_remove(s, vs, err); | |
2634 | return; | |
2635 | ||
2636 | out: | |
2637 | complete_pdu(s, pdu, err); | |
2638 | qemu_free(vs); | |
9f107513 AL |
2639 | } |
2640 | ||
8cf89e00 AL |
2641 | static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2642 | { | |
2643 | if (err < 0) { | |
2644 | goto out; | |
2645 | } | |
2646 | ||
2647 | err = vs->offset; | |
2648 | ||
2649 | out: | |
2650 | v9fs_stat_free(&vs->v9stat); | |
2651 | complete_pdu(s, vs->pdu, err); | |
2652 | qemu_free(vs); | |
2653 | } | |
2654 | ||
2655 | static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) | |
2656 | { | |
2657 | if (err < 0) { | |
2658 | goto out; | |
2659 | } | |
8cf89e00 AL |
2660 | if (vs->v9stat.length != -1) { |
2661 | if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { | |
2662 | err = -errno; | |
2663 | } | |
2664 | } | |
2665 | v9fs_wstat_post_truncate(s, vs, err); | |
2666 | return; | |
2667 | ||
2668 | out: | |
2669 | v9fs_stat_free(&vs->v9stat); | |
2670 | complete_pdu(s, vs->pdu, err); | |
2671 | qemu_free(vs); | |
2672 | } | |
2673 | ||
c7b4b0b3 | 2674 | static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs) |
8cf89e00 | 2675 | { |
c7b4b0b3 MK |
2676 | int err = 0; |
2677 | char *old_name, *new_name; | |
2678 | char *end; | |
8cf89e00 | 2679 | |
c7b4b0b3 MK |
2680 | if (vs->newdirfid != -1) { |
2681 | V9fsFidState *dirfidp; | |
2682 | dirfidp = lookup_fid(s, vs->newdirfid); | |
2683 | ||
2684 | if (dirfidp == NULL) { | |
2685 | err = -ENOENT; | |
2686 | goto out; | |
2687 | } | |
2688 | ||
d62dbb51 | 2689 | BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
8cf89e00 | 2690 | |
c7b4b0b3 MK |
2691 | new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2); |
2692 | ||
2693 | strcpy(new_name, dirfidp->path.data); | |
2694 | strcat(new_name, "/"); | |
2695 | strcat(new_name + dirfidp->path.size, vs->name.data); | |
2696 | } else { | |
8cf89e00 AL |
2697 | old_name = vs->fidp->path.data; |
2698 | end = strrchr(old_name, '/'); | |
2699 | if (end) { | |
2700 | end++; | |
2701 | } else { | |
2702 | end = old_name; | |
2703 | } | |
c7b4b0b3 | 2704 | new_name = qemu_mallocz(end - old_name + vs->name.size + 1); |
8cf89e00 | 2705 | |
c7b4b0b3 MK |
2706 | strncat(new_name, old_name, end - old_name); |
2707 | strncat(new_name + (end - old_name), vs->name.data, vs->name.size); | |
2708 | } | |
8cf89e00 | 2709 | |
c7b4b0b3 MK |
2710 | v9fs_string_free(&vs->name); |
2711 | vs->name.data = qemu_strdup(new_name); | |
2712 | vs->name.size = strlen(new_name); | |
8cf89e00 | 2713 | |
c7b4b0b3 MK |
2714 | if (strcmp(new_name, vs->fidp->path.data) != 0) { |
2715 | if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) { | |
2716 | err = -errno; | |
2717 | } else { | |
2718 | V9fsFidState *fidp; | |
2719 | /* | |
2720 | * Fixup fid's pointing to the old name to | |
2721 | * start pointing to the new name | |
2722 | */ | |
2723 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2724 | if (vs->fidp == fidp) { | |
2725 | /* | |
936532a4 MN |
2726 | * we replace name of this fid towards the end so |
2727 | * that our below v9fs_path_is_ancestor check will | |
2728 | * work | |
c7b4b0b3 MK |
2729 | */ |
2730 | continue; | |
2731 | } | |
936532a4 | 2732 | if (v9fs_path_is_ancestor(&vs->fidp->path, &fidp->path)) { |
c7b4b0b3 MK |
2733 | /* replace the name */ |
2734 | v9fs_fix_path(&fidp->path, &vs->name, | |
2735 | strlen(vs->fidp->path.data)); | |
8cf89e00 | 2736 | } |
8cf89e00 | 2737 | } |
c7b4b0b3 | 2738 | v9fs_string_copy(&vs->fidp->path, &vs->name); |
8cf89e00 AL |
2739 | } |
2740 | } | |
c7b4b0b3 MK |
2741 | out: |
2742 | v9fs_string_free(&vs->name); | |
2743 | return err; | |
2744 | } | |
2745 | ||
2746 | static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err) | |
2747 | { | |
2748 | complete_pdu(s, vs->pdu, err); | |
2749 | qemu_free(vs); | |
2750 | } | |
2751 | ||
2752 | static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) | |
2753 | { | |
2754 | if (err < 0) { | |
2755 | goto out; | |
2756 | } | |
2757 | ||
2758 | if (vs->v9stat.name.size != 0) { | |
2759 | V9fsRenameState *vr; | |
2760 | ||
783f04e1 | 2761 | vr = qemu_mallocz(sizeof(V9fsRenameState)); |
c7b4b0b3 MK |
2762 | vr->newdirfid = -1; |
2763 | vr->pdu = vs->pdu; | |
2764 | vr->fidp = vs->fidp; | |
2765 | vr->offset = vs->offset; | |
2766 | vr->name.size = vs->v9stat.name.size; | |
2767 | vr->name.data = qemu_strdup(vs->v9stat.name.data); | |
2768 | ||
2769 | err = v9fs_complete_rename(s, vr); | |
2770 | qemu_free(vr); | |
2771 | } | |
8cf89e00 AL |
2772 | v9fs_wstat_post_rename(s, vs, err); |
2773 | return; | |
2774 | ||
2775 | out: | |
2776 | v9fs_stat_free(&vs->v9stat); | |
2777 | complete_pdu(s, vs->pdu, err); | |
2778 | qemu_free(vs); | |
2779 | } | |
2780 | ||
ff06030f | 2781 | static void v9fs_rename(void *opaque) |
c7b4b0b3 | 2782 | { |
ff06030f VJ |
2783 | V9fsPDU *pdu = opaque; |
2784 | V9fsState *s = pdu->s; | |
c7b4b0b3 MK |
2785 | int32_t fid; |
2786 | V9fsRenameState *vs; | |
2787 | ssize_t err = 0; | |
2788 | ||
2789 | vs = qemu_malloc(sizeof(*vs)); | |
2790 | vs->pdu = pdu; | |
2791 | vs->offset = 7; | |
2792 | ||
2793 | pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name); | |
2794 | ||
2795 | vs->fidp = lookup_fid(s, fid); | |
2796 | if (vs->fidp == NULL) { | |
2797 | err = -ENOENT; | |
2798 | goto out; | |
2799 | } | |
2800 | ||
d62dbb51 | 2801 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
c7b4b0b3 MK |
2802 | |
2803 | err = v9fs_complete_rename(s, vs); | |
2804 | v9fs_rename_post_rename(s, vs, err); | |
2805 | return; | |
2806 | out: | |
2807 | complete_pdu(s, vs->pdu, err); | |
2808 | qemu_free(vs); | |
2809 | } | |
2810 | ||
8cf89e00 AL |
2811 | static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2812 | { | |
2813 | if (err < 0) { | |
2814 | goto out; | |
2815 | } | |
2816 | ||
f7613bee | 2817 | if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
8cf89e00 AL |
2818 | if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid, |
2819 | vs->v9stat.n_gid)) { | |
2820 | err = -errno; | |
2821 | } | |
2822 | } | |
2823 | v9fs_wstat_post_chown(s, vs, err); | |
2824 | return; | |
2825 | ||
2826 | out: | |
2827 | v9fs_stat_free(&vs->v9stat); | |
2828 | complete_pdu(s, vs->pdu, err); | |
2829 | qemu_free(vs); | |
2830 | } | |
2831 | ||
2832 | static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) | |
2833 | { | |
2834 | if (err < 0) { | |
2835 | goto out; | |
2836 | } | |
2837 | ||
74bc02b2 | 2838 | if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
8fc39ae4 SK |
2839 | struct timespec times[2]; |
2840 | if (vs->v9stat.atime != -1) { | |
2841 | times[0].tv_sec = vs->v9stat.atime; | |
2842 | times[0].tv_nsec = 0; | |
2843 | } else { | |
2844 | times[0].tv_nsec = UTIME_OMIT; | |
2845 | } | |
2846 | if (vs->v9stat.mtime != -1) { | |
2847 | times[1].tv_sec = vs->v9stat.mtime; | |
2848 | times[1].tv_nsec = 0; | |
2849 | } else { | |
2850 | times[1].tv_nsec = UTIME_OMIT; | |
2851 | } | |
2852 | ||
2853 | if (v9fs_do_utimensat(s, &vs->fidp->path, times)) { | |
8cf89e00 AL |
2854 | err = -errno; |
2855 | } | |
2856 | } | |
2857 | ||
2858 | v9fs_wstat_post_utime(s, vs, err); | |
2859 | return; | |
2860 | ||
2861 | out: | |
2862 | v9fs_stat_free(&vs->v9stat); | |
2863 | complete_pdu(s, vs->pdu, err); | |
2864 | qemu_free(vs); | |
2865 | } | |
2866 | ||
2867 | static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) | |
2868 | { | |
2869 | if (err == -1) { | |
2870 | err = -errno; | |
2871 | } | |
2872 | v9fs_stat_free(&vs->v9stat); | |
2873 | complete_pdu(s, vs->pdu, err); | |
2874 | qemu_free(vs); | |
2875 | } | |
2876 | ||
2877 | static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) | |
2878 | { | |
2879 | uint32_t v9_mode; | |
2880 | ||
2881 | if (err == -1) { | |
2882 | err = -errno; | |
2883 | goto out; | |
2884 | } | |
2885 | ||
2886 | v9_mode = stat_to_v9mode(&vs->stbuf); | |
2887 | ||
2888 | if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2889 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2890 | /* Attempting to change the type */ | |
2891 | err = -EIO; | |
2892 | goto out; | |
2893 | } | |
2894 | ||
2895 | if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode, | |
2896 | &vs->v9stat.extension))) { | |
2897 | err = -errno; | |
2898 | } | |
2899 | v9fs_wstat_post_chmod(s, vs, err); | |
2900 | return; | |
2901 | ||
2902 | out: | |
2903 | v9fs_stat_free(&vs->v9stat); | |
2904 | complete_pdu(s, vs->pdu, err); | |
2905 | qemu_free(vs); | |
2906 | } | |
2907 | ||
ff06030f | 2908 | static void v9fs_wstat(void *opaque) |
9f107513 | 2909 | { |
ff06030f VJ |
2910 | V9fsPDU *pdu = opaque; |
2911 | V9fsState *s = pdu->s; | |
8cf89e00 AL |
2912 | int32_t fid; |
2913 | V9fsWstatState *vs; | |
2914 | int err = 0; | |
2915 | ||
2916 | vs = qemu_malloc(sizeof(*vs)); | |
2917 | vs->pdu = pdu; | |
2918 | vs->offset = 7; | |
2919 | ||
2920 | pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat); | |
2921 | ||
2922 | vs->fidp = lookup_fid(s, fid); | |
2923 | if (vs->fidp == NULL) { | |
2924 | err = -EINVAL; | |
2925 | goto out; | |
9f107513 | 2926 | } |
8cf89e00 AL |
2927 | |
2928 | /* do we need to sync the file? */ | |
2929 | if (donttouch_stat(&vs->v9stat)) { | |
49594973 | 2930 | err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0); |
8cf89e00 AL |
2931 | v9fs_wstat_post_fsync(s, vs, err); |
2932 | return; | |
2933 | } | |
2934 | ||
2935 | if (vs->v9stat.mode != -1) { | |
2936 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
2937 | v9fs_wstat_post_lstat(s, vs, err); | |
2938 | return; | |
2939 | } | |
2940 | ||
2941 | v9fs_wstat_post_chmod(s, vs, err); | |
2942 | return; | |
2943 | ||
2944 | out: | |
2945 | v9fs_stat_free(&vs->v9stat); | |
2946 | complete_pdu(s, vs->pdu, err); | |
2947 | qemu_free(vs); | |
9f107513 AL |
2948 | } |
2949 | ||
88a4763e AK |
2950 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2951 | { | |
2952 | uint32_t f_type; | |
2953 | uint32_t f_bsize; | |
2954 | uint64_t f_blocks; | |
2955 | uint64_t f_bfree; | |
2956 | uint64_t f_bavail; | |
2957 | uint64_t f_files; | |
2958 | uint64_t f_ffree; | |
2959 | uint64_t fsid_val; | |
2960 | uint32_t f_namelen; | |
2961 | size_t offset = 7; | |
5e94c103 MK |
2962 | int32_t bsize_factor; |
2963 | ||
5e94c103 MK |
2964 | /* |
2965 | * compute bsize factor based on host file system block size | |
2966 | * and client msize | |
2967 | */ | |
88a4763e | 2968 | bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
5e94c103 MK |
2969 | if (!bsize_factor) { |
2970 | bsize_factor = 1; | |
2971 | } | |
88a4763e AK |
2972 | f_type = stbuf->f_type; |
2973 | f_bsize = stbuf->f_bsize; | |
2974 | f_bsize *= bsize_factor; | |
5e94c103 MK |
2975 | /* |
2976 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
2977 | * adjust(divide) the number of blocks, free blocks and available | |
2978 | * blocks by bsize factor | |
2979 | */ | |
88a4763e AK |
2980 | f_blocks = stbuf->f_blocks/bsize_factor; |
2981 | f_bfree = stbuf->f_bfree/bsize_factor; | |
2982 | f_bavail = stbuf->f_bavail/bsize_factor; | |
2983 | f_files = stbuf->f_files; | |
2984 | f_ffree = stbuf->f_ffree; | |
2985 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | | |
2986 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; | |
2987 | f_namelen = stbuf->f_namelen; | |
be940c87 | 2988 | |
88a4763e AK |
2989 | return pdu_marshal(pdu, offset, "ddqqqqqqd", |
2990 | f_type, f_bsize, f_blocks, f_bfree, | |
2991 | f_bavail, f_files, f_ffree, | |
2992 | fsid_val, f_namelen); | |
be940c87 MK |
2993 | } |
2994 | ||
ff06030f | 2995 | static void v9fs_statfs(void *opaque) |
be940c87 | 2996 | { |
88a4763e AK |
2997 | int32_t fid; |
2998 | ssize_t retval = 0; | |
2999 | size_t offset = 7; | |
3000 | V9fsFidState *fidp; | |
3001 | struct statfs stbuf; | |
ff06030f VJ |
3002 | V9fsPDU *pdu = opaque; |
3003 | V9fsState *s = pdu->s; | |
be940c87 | 3004 | |
88a4763e AK |
3005 | pdu_unmarshal(pdu, offset, "d", &fid); |
3006 | fidp = lookup_fid(s, fid); | |
3007 | if (fidp == NULL) { | |
3008 | retval = -ENOENT; | |
be940c87 MK |
3009 | goto out; |
3010 | } | |
88a4763e AK |
3011 | retval = v9fs_co_statfs(s, &fidp->path, &stbuf); |
3012 | if (retval < 0) { | |
3013 | goto out; | |
3014 | } | |
3015 | retval = offset; | |
3016 | retval += v9fs_fill_statfs(s, pdu, &stbuf); | |
be940c87 | 3017 | out: |
88a4763e | 3018 | complete_pdu(s, pdu, retval); |
ff06030f | 3019 | return; |
be940c87 MK |
3020 | } |
3021 | ||
5268cecc MK |
3022 | static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3023 | { | |
3024 | if (err == -1) { | |
3025 | err = -errno; | |
3026 | goto out; | |
3027 | } | |
3028 | ||
3029 | stat_to_qid(&vs->stbuf, &vs->qid); | |
3030 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
3031 | err = vs->offset; | |
3032 | out: | |
3033 | complete_pdu(s, vs->pdu, err); | |
3034 | v9fs_string_free(&vs->fullname); | |
3035 | v9fs_string_free(&vs->name); | |
3036 | qemu_free(vs); | |
3037 | } | |
3038 | ||
3039 | static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err) | |
3040 | { | |
3041 | if (err == -1) { | |
3042 | err = -errno; | |
3043 | goto out; | |
3044 | } | |
3045 | ||
3046 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
3047 | v9fs_mknod_post_lstat(s, vs, err); | |
3048 | return; | |
3049 | out: | |
3050 | complete_pdu(s, vs->pdu, err); | |
3051 | v9fs_string_free(&vs->fullname); | |
3052 | v9fs_string_free(&vs->name); | |
3053 | qemu_free(vs); | |
3054 | } | |
3055 | ||
ff06030f | 3056 | static void v9fs_mknod(void *opaque) |
5268cecc | 3057 | { |
ff06030f VJ |
3058 | V9fsPDU *pdu = opaque; |
3059 | V9fsState *s = pdu->s; | |
5268cecc MK |
3060 | int32_t fid; |
3061 | V9fsMkState *vs; | |
3062 | int err = 0; | |
3063 | V9fsFidState *fidp; | |
3064 | gid_t gid; | |
3065 | int mode; | |
3066 | int major, minor; | |
3067 | ||
3068 | vs = qemu_malloc(sizeof(*vs)); | |
3069 | vs->pdu = pdu; | |
3070 | vs->offset = 7; | |
3071 | ||
3072 | v9fs_string_init(&vs->fullname); | |
3073 | pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode, | |
3074 | &major, &minor, &gid); | |
3075 | ||
3076 | fidp = lookup_fid(s, fid); | |
3077 | if (fidp == NULL) { | |
3078 | err = -ENOENT; | |
3079 | goto out; | |
3080 | } | |
3081 | ||
3082 | v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data); | |
3083 | err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor), | |
3084 | fidp->uid, gid); | |
3085 | v9fs_mknod_post_mknod(s, vs, err); | |
3086 | return; | |
3087 | ||
3088 | out: | |
3089 | complete_pdu(s, vs->pdu, err); | |
3090 | v9fs_string_free(&vs->fullname); | |
3091 | v9fs_string_free(&vs->name); | |
3092 | qemu_free(vs); | |
3093 | } | |
3094 | ||
82cc3ee8 MK |
3095 | /* |
3096 | * Implement posix byte range locking code | |
3097 | * Server side handling of locking code is very simple, because 9p server in | |
3098 | * QEMU can handle only one client. And most of the lock handling | |
3099 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to | |
3100 | * do any thing in * qemu 9p server side lock code path. | |
3101 | * So when a TLOCK request comes, always return success | |
3102 | */ | |
3103 | ||
ff06030f | 3104 | static void v9fs_lock(void *opaque) |
82cc3ee8 | 3105 | { |
ff06030f VJ |
3106 | V9fsPDU *pdu = opaque; |
3107 | V9fsState *s = pdu->s; | |
82cc3ee8 MK |
3108 | int32_t fid, err = 0; |
3109 | V9fsLockState *vs; | |
3110 | ||
3111 | vs = qemu_mallocz(sizeof(*vs)); | |
3112 | vs->pdu = pdu; | |
3113 | vs->offset = 7; | |
3114 | ||
3115 | vs->flock = qemu_malloc(sizeof(*vs->flock)); | |
3116 | pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type, | |
3117 | &vs->flock->flags, &vs->flock->start, &vs->flock->length, | |
3118 | &vs->flock->proc_id, &vs->flock->client_id); | |
3119 | ||
3120 | vs->status = P9_LOCK_ERROR; | |
3121 | ||
3122 | /* We support only block flag now (that too ignored currently) */ | |
3123 | if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) { | |
3124 | err = -EINVAL; | |
3125 | goto out; | |
3126 | } | |
3127 | vs->fidp = lookup_fid(s, fid); | |
3128 | if (vs->fidp == NULL) { | |
3129 | err = -ENOENT; | |
3130 | goto out; | |
3131 | } | |
3132 | ||
3133 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
3134 | if (err < 0) { | |
3135 | err = -errno; | |
3136 | goto out; | |
3137 | } | |
3138 | vs->status = P9_LOCK_SUCCESS; | |
3139 | out: | |
3140 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status); | |
3141 | complete_pdu(s, vs->pdu, err); | |
3142 | qemu_free(vs->flock); | |
3143 | qemu_free(vs); | |
3144 | } | |
3145 | ||
8f354003 MK |
3146 | /* |
3147 | * When a TGETLOCK request comes, always return success because all lock | |
3148 | * handling is done by client's VFS layer. | |
3149 | */ | |
3150 | ||
ff06030f | 3151 | static void v9fs_getlock(void *opaque) |
8f354003 | 3152 | { |
ff06030f VJ |
3153 | V9fsPDU *pdu = opaque; |
3154 | V9fsState *s = pdu->s; | |
8f354003 MK |
3155 | int32_t fid, err = 0; |
3156 | V9fsGetlockState *vs; | |
3157 | ||
3158 | vs = qemu_mallocz(sizeof(*vs)); | |
3159 | vs->pdu = pdu; | |
3160 | vs->offset = 7; | |
3161 | ||
3162 | vs->glock = qemu_malloc(sizeof(*vs->glock)); | |
3163 | pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type, | |
3164 | &vs->glock->start, &vs->glock->length, &vs->glock->proc_id, | |
3165 | &vs->glock->client_id); | |
3166 | ||
3167 | vs->fidp = lookup_fid(s, fid); | |
3168 | if (vs->fidp == NULL) { | |
3169 | err = -ENOENT; | |
3170 | goto out; | |
3171 | } | |
3172 | ||
3173 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
3174 | if (err < 0) { | |
3175 | err = -errno; | |
3176 | goto out; | |
3177 | } | |
3178 | vs->glock->type = F_UNLCK; | |
3179 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type, | |
3180 | vs->glock->start, vs->glock->length, vs->glock->proc_id, | |
3181 | &vs->glock->client_id); | |
3182 | out: | |
3183 | complete_pdu(s, vs->pdu, err); | |
3184 | qemu_free(vs->glock); | |
3185 | qemu_free(vs); | |
3186 | } | |
3187 | ||
b67592ea MK |
3188 | static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3189 | { | |
3190 | if (err == -1) { | |
3191 | err = -errno; | |
3192 | goto out; | |
3193 | } | |
3194 | ||
3195 | stat_to_qid(&vs->stbuf, &vs->qid); | |
3196 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
3197 | err = vs->offset; | |
3198 | out: | |
3199 | complete_pdu(s, vs->pdu, err); | |
3200 | v9fs_string_free(&vs->fullname); | |
3201 | v9fs_string_free(&vs->name); | |
3202 | qemu_free(vs); | |
3203 | } | |
3204 | ||
3205 | static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err) | |
3206 | { | |
3207 | if (err == -1) { | |
3208 | err = -errno; | |
3209 | goto out; | |
3210 | } | |
3211 | ||
3212 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
3213 | v9fs_mkdir_post_lstat(s, vs, err); | |
3214 | return; | |
3215 | out: | |
3216 | complete_pdu(s, vs->pdu, err); | |
3217 | v9fs_string_free(&vs->fullname); | |
3218 | v9fs_string_free(&vs->name); | |
3219 | qemu_free(vs); | |
3220 | } | |
3221 | ||
ff06030f | 3222 | static void v9fs_mkdir(void *opaque) |
b67592ea | 3223 | { |
ff06030f VJ |
3224 | V9fsPDU *pdu = opaque; |
3225 | V9fsState *s = pdu->s; | |
b67592ea MK |
3226 | int32_t fid; |
3227 | V9fsMkState *vs; | |
3228 | int err = 0; | |
3229 | V9fsFidState *fidp; | |
3230 | gid_t gid; | |
3231 | int mode; | |
3232 | ||
3233 | vs = qemu_malloc(sizeof(*vs)); | |
3234 | vs->pdu = pdu; | |
3235 | vs->offset = 7; | |
3236 | ||
3237 | v9fs_string_init(&vs->fullname); | |
3238 | pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode, | |
3239 | &gid); | |
3240 | ||
3241 | fidp = lookup_fid(s, fid); | |
3242 | if (fidp == NULL) { | |
3243 | err = -ENOENT; | |
3244 | goto out; | |
3245 | } | |
3246 | ||
3247 | v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data); | |
3248 | err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid); | |
3249 | v9fs_mkdir_post_mkdir(s, vs, err); | |
3250 | return; | |
3251 | ||
3252 | out: | |
3253 | complete_pdu(s, vs->pdu, err); | |
3254 | v9fs_string_free(&vs->fullname); | |
3255 | v9fs_string_free(&vs->name); | |
3256 | qemu_free(vs); | |
3257 | } | |
3258 | ||
ff06030f | 3259 | static void v9fs_xattrwalk(void *opaque) |
fa32ef88 | 3260 | { |
670185a6 AK |
3261 | int64_t size; |
3262 | V9fsString name; | |
fa32ef88 | 3263 | ssize_t err = 0; |
670185a6 | 3264 | size_t offset = 7; |
fa32ef88 | 3265 | int32_t fid, newfid; |
670185a6 AK |
3266 | V9fsFidState *file_fidp; |
3267 | V9fsFidState *xattr_fidp; | |
3268 | V9fsPDU *pdu = opaque; | |
3269 | V9fsState *s = pdu->s; | |
fa32ef88 | 3270 | |
670185a6 AK |
3271 | pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); |
3272 | file_fidp = lookup_fid(s, fid); | |
3273 | if (file_fidp == NULL) { | |
fa32ef88 AK |
3274 | err = -ENOENT; |
3275 | goto out; | |
3276 | } | |
670185a6 AK |
3277 | xattr_fidp = alloc_fid(s, newfid); |
3278 | if (xattr_fidp == NULL) { | |
fa32ef88 AK |
3279 | err = -EINVAL; |
3280 | goto out; | |
3281 | } | |
670185a6 AK |
3282 | v9fs_string_copy(&xattr_fidp->path, &file_fidp->path); |
3283 | if (name.data[0] == 0) { | |
fa32ef88 AK |
3284 | /* |
3285 | * listxattr request. Get the size first | |
3286 | */ | |
670185a6 AK |
3287 | size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0); |
3288 | if (size < 0) { | |
3289 | err = size; | |
3290 | free_fid(s, xattr_fidp->fid); | |
3291 | goto out; | |
fa32ef88 | 3292 | } |
670185a6 AK |
3293 | /* |
3294 | * Read the xattr value | |
3295 | */ | |
3296 | xattr_fidp->fs.xattr.len = size; | |
3297 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3298 | xattr_fidp->fs.xattr.copied_len = -1; | |
3299 | if (size) { | |
3300 | xattr_fidp->fs.xattr.value = qemu_malloc(size); | |
3301 | err = v9fs_co_llistxattr(s, &xattr_fidp->path, | |
3302 | xattr_fidp->fs.xattr.value, | |
3303 | xattr_fidp->fs.xattr.len); | |
3304 | if (err < 0) { | |
3305 | free_fid(s, xattr_fidp->fid); | |
3306 | goto out; | |
3307 | } | |
3308 | } | |
3309 | offset += pdu_marshal(pdu, offset, "q", size); | |
3310 | err = offset; | |
fa32ef88 AK |
3311 | } else { |
3312 | /* | |
3313 | * specific xattr fid. We check for xattr | |
3314 | * presence also collect the xattr size | |
3315 | */ | |
670185a6 AK |
3316 | size = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
3317 | &name, NULL, 0); | |
3318 | if (size < 0) { | |
3319 | err = size; | |
3320 | free_fid(s, xattr_fidp->fid); | |
3321 | goto out; | |
fa32ef88 | 3322 | } |
670185a6 AK |
3323 | /* |
3324 | * Read the xattr value | |
3325 | */ | |
3326 | xattr_fidp->fs.xattr.len = size; | |
3327 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3328 | xattr_fidp->fs.xattr.copied_len = -1; | |
3329 | if (size) { | |
3330 | xattr_fidp->fs.xattr.value = qemu_malloc(size); | |
3331 | err = v9fs_co_lgetxattr(s, &xattr_fidp->path, | |
3332 | &name, xattr_fidp->fs.xattr.value, | |
3333 | xattr_fidp->fs.xattr.len); | |
3334 | if (err < 0) { | |
3335 | free_fid(s, xattr_fidp->fid); | |
3336 | goto out; | |
3337 | } | |
3338 | } | |
3339 | offset += pdu_marshal(pdu, offset, "q", size); | |
3340 | err = offset; | |
fa32ef88 AK |
3341 | } |
3342 | out: | |
670185a6 AK |
3343 | complete_pdu(s, pdu, err); |
3344 | v9fs_string_free(&name); | |
fa32ef88 AK |
3345 | } |
3346 | ||
ff06030f | 3347 | static void v9fs_xattrcreate(void *opaque) |
10b468bd AK |
3348 | { |
3349 | int flags; | |
3350 | int32_t fid; | |
f10ff58d | 3351 | int64_t size; |
10b468bd | 3352 | ssize_t err = 0; |
f10ff58d AK |
3353 | V9fsString name; |
3354 | size_t offset = 7; | |
3355 | V9fsFidState *file_fidp; | |
3356 | V9fsFidState *xattr_fidp; | |
3357 | V9fsPDU *pdu = opaque; | |
3358 | V9fsState *s = pdu->s; | |
10b468bd | 3359 | |
f10ff58d AK |
3360 | pdu_unmarshal(pdu, offset, "dsqd", |
3361 | &fid, &name, &size, &flags); | |
10b468bd | 3362 | |
f10ff58d AK |
3363 | file_fidp = lookup_fid(s, fid); |
3364 | if (file_fidp == NULL) { | |
10b468bd AK |
3365 | err = -EINVAL; |
3366 | goto out; | |
3367 | } | |
10b468bd | 3368 | /* Make the file fid point to xattr */ |
f10ff58d AK |
3369 | xattr_fidp = file_fidp; |
3370 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3371 | xattr_fidp->fs.xattr.copied_len = 0; | |
3372 | xattr_fidp->fs.xattr.len = size; | |
3373 | xattr_fidp->fs.xattr.flags = flags; | |
3374 | v9fs_string_init(&xattr_fidp->fs.xattr.name); | |
3375 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); | |
3376 | if (size) { | |
3377 | xattr_fidp->fs.xattr.value = qemu_malloc(size); | |
3378 | } else { | |
3379 | xattr_fidp->fs.xattr.value = NULL; | |
3380 | } | |
3381 | err = offset; | |
10b468bd | 3382 | out: |
f10ff58d AK |
3383 | complete_pdu(s, pdu, err); |
3384 | v9fs_string_free(&name); | |
10b468bd | 3385 | } |
fa32ef88 | 3386 | |
ff06030f | 3387 | static void v9fs_readlink(void *opaque) |
df0973a4 | 3388 | { |
ff06030f | 3389 | V9fsPDU *pdu = opaque; |
7a5ca31e VJ |
3390 | size_t offset = 7; |
3391 | V9fsString target; | |
df0973a4 | 3392 | int32_t fid; |
df0973a4 MK |
3393 | int err = 0; |
3394 | V9fsFidState *fidp; | |
3395 | ||
7a5ca31e VJ |
3396 | pdu_unmarshal(pdu, offset, "d", &fid); |
3397 | fidp = lookup_fid(pdu->s, fid); | |
df0973a4 MK |
3398 | if (fidp == NULL) { |
3399 | err = -ENOENT; | |
3400 | goto out; | |
3401 | } | |
3402 | ||
7a5ca31e VJ |
3403 | v9fs_string_init(&target); |
3404 | err = v9fs_co_readlink(pdu->s, &fidp->path, &target); | |
3405 | if (err < 0) { | |
3406 | goto out; | |
3407 | } | |
3408 | offset += pdu_marshal(pdu, offset, "s", &target); | |
3409 | err = offset; | |
3410 | v9fs_string_free(&target); | |
df0973a4 | 3411 | out: |
7a5ca31e | 3412 | complete_pdu(pdu->s, pdu, err); |
df0973a4 MK |
3413 | } |
3414 | ||
ff06030f | 3415 | static CoroutineEntry *pdu_co_handlers[] = { |
c18e2f94 | 3416 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3417 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3418 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3419 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 3420 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 3421 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 3422 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 3423 | [P9_TRENAME] = v9fs_rename, |
82cc3ee8 | 3424 | [P9_TLOCK] = v9fs_lock, |
8f354003 | 3425 | [P9_TGETLOCK] = v9fs_getlock, |
df0973a4 | 3426 | [P9_TREADLINK] = v9fs_readlink, |
b67592ea | 3427 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 3428 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 3429 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
3430 | [P9_TATTACH] = v9fs_attach, |
3431 | [P9_TSTAT] = v9fs_stat, | |
3432 | [P9_TWALK] = v9fs_walk, | |
3433 | [P9_TCLUNK] = v9fs_clunk, | |
b41e95d3 | 3434 | [P9_TFSYNC] = v9fs_fsync, |
9f107513 AL |
3435 | [P9_TOPEN] = v9fs_open, |
3436 | [P9_TREAD] = v9fs_read, | |
3437 | #if 0 | |
3438 | [P9_TAUTH] = v9fs_auth, | |
3439 | #endif | |
3440 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3441 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3442 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3443 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3444 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3445 | [P9_TWRITE] = v9fs_write, |
3446 | [P9_TWSTAT] = v9fs_wstat, | |
3447 | [P9_TREMOVE] = v9fs_remove, | |
3448 | }; | |
3449 | ||
ff06030f | 3450 | static void v9fs_op_not_supp(void *opaque) |
5c3234c6 | 3451 | { |
ff06030f VJ |
3452 | V9fsPDU *pdu = opaque; |
3453 | complete_pdu(pdu->s, pdu, -EOPNOTSUPP); | |
5c3234c6 AK |
3454 | } |
3455 | ||
9f107513 AL |
3456 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3457 | { | |
ff06030f VJ |
3458 | Coroutine *co; |
3459 | CoroutineEntry *handler; | |
9f107513 AL |
3460 | |
3461 | if (debug_9p_pdu) { | |
3462 | pprint_pdu(pdu); | |
3463 | } | |
ff06030f VJ |
3464 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || |
3465 | (pdu_co_handlers[pdu->id] == NULL)) { | |
5c3234c6 AK |
3466 | handler = v9fs_op_not_supp; |
3467 | } else { | |
ff06030f | 3468 | handler = pdu_co_handlers[pdu->id]; |
5c3234c6 | 3469 | } |
ff06030f VJ |
3470 | co = qemu_coroutine_create(handler); |
3471 | qemu_coroutine_enter(co, pdu); | |
9f107513 AL |
3472 | } |
3473 | ||
f4f61d27 | 3474 | void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
9f107513 AL |
3475 | { |
3476 | V9fsState *s = (V9fsState *)vdev; | |
3477 | V9fsPDU *pdu; | |
3478 | ssize_t len; | |
3479 | ||
3480 | while ((pdu = alloc_pdu(s)) && | |
3481 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
3482 | uint8_t *ptr; | |
ff06030f | 3483 | pdu->s = s; |
9f107513 AL |
3484 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3485 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
3486 | ||
3487 | ptr = pdu->elem.out_sg[0].iov_base; | |
3488 | ||
3489 | memcpy(&pdu->size, ptr, 4); | |
3490 | pdu->id = ptr[4]; | |
3491 | memcpy(&pdu->tag, ptr + 5, 2); | |
9f107513 AL |
3492 | submit_pdu(s, pdu); |
3493 | } | |
9f107513 AL |
3494 | free_pdu(s, pdu); |
3495 | } |