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Commit | Line | Data |
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9f107513 AL |
1 | /* |
2 | * Virtio 9p backend | |
3 | * | |
4 | * Copyright IBM, Corp. 2010 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include "virtio.h" | |
15 | #include "pc.h" | |
16 | #include "qemu_socket.h" | |
17 | #include "virtio-9p.h" | |
18 | #include "fsdev/qemu-fsdev.h" | |
19 | #include "virtio-9p-debug.h" | |
20 | ||
9f107513 AL |
21 | int debug_9p_pdu; |
22 | ||
fac4f111 VJ |
23 | enum { |
24 | Oread = 0x00, | |
25 | Owrite = 0x01, | |
26 | Ordwr = 0x02, | |
27 | Oexec = 0x03, | |
28 | Oexcl = 0x04, | |
29 | Otrunc = 0x10, | |
30 | Orexec = 0x20, | |
31 | Orclose = 0x40, | |
32 | Oappend = 0x80, | |
33 | }; | |
34 | ||
35 | static int omode_to_uflags(int8_t mode) | |
36 | { | |
37 | int ret = 0; | |
38 | ||
39 | switch (mode & 3) { | |
40 | case Oread: | |
41 | ret = O_RDONLY; | |
42 | break; | |
43 | case Ordwr: | |
44 | ret = O_RDWR; | |
45 | break; | |
46 | case Owrite: | |
47 | ret = O_WRONLY; | |
48 | break; | |
49 | case Oexec: | |
50 | ret = O_RDONLY; | |
51 | break; | |
52 | } | |
53 | ||
54 | if (mode & Otrunc) { | |
55 | ret |= O_TRUNC; | |
56 | } | |
57 | ||
58 | if (mode & Oappend) { | |
59 | ret |= O_APPEND; | |
60 | } | |
61 | ||
62 | if (mode & Oexcl) { | |
63 | ret |= O_EXCL; | |
64 | } | |
65 | ||
66 | return ret; | |
67 | } | |
68 | ||
758e8e38 | 69 | void cred_init(FsCred *credp) |
131dcb25 | 70 | { |
758e8e38 VJ |
71 | credp->fc_uid = -1; |
72 | credp->fc_gid = -1; | |
73 | credp->fc_mode = -1; | |
74 | credp->fc_rdev = -1; | |
131dcb25 AL |
75 | } |
76 | ||
758e8e38 | 77 | static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
131dcb25 | 78 | { |
758e8e38 | 79 | return s->ops->lstat(&s->ctx, path->data, stbuf); |
131dcb25 AL |
80 | } |
81 | ||
82 | static ssize_t v9fs_do_readlink(V9fsState *s, V9fsString *path, V9fsString *buf) | |
83 | { | |
84 | ssize_t len; | |
85 | ||
86 | buf->data = qemu_malloc(1024); | |
87 | ||
88 | len = s->ops->readlink(&s->ctx, path->data, buf->data, 1024 - 1); | |
89 | if (len > -1) { | |
90 | buf->size = len; | |
91 | buf->data[len] = 0; | |
92 | } | |
93 | ||
94 | return len; | |
95 | } | |
96 | ||
97 | static int v9fs_do_close(V9fsState *s, int fd) | |
98 | { | |
99 | return s->ops->close(&s->ctx, fd); | |
100 | } | |
101 | ||
102 | static int v9fs_do_closedir(V9fsState *s, DIR *dir) | |
103 | { | |
104 | return s->ops->closedir(&s->ctx, dir); | |
105 | } | |
106 | ||
a6568fe2 AL |
107 | static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
108 | { | |
109 | return s->ops->open(&s->ctx, path->data, flags); | |
110 | } | |
111 | ||
112 | static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path) | |
113 | { | |
114 | return s->ops->opendir(&s->ctx, path->data); | |
115 | } | |
116 | ||
a9231555 AL |
117 | static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
118 | { | |
119 | return s->ops->rewinddir(&s->ctx, dir); | |
120 | } | |
121 | ||
122 | static off_t v9fs_do_telldir(V9fsState *s, DIR *dir) | |
123 | { | |
124 | return s->ops->telldir(&s->ctx, dir); | |
125 | } | |
126 | ||
127 | static struct dirent *v9fs_do_readdir(V9fsState *s, DIR *dir) | |
128 | { | |
129 | return s->ops->readdir(&s->ctx, dir); | |
130 | } | |
131 | ||
132 | static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) | |
133 | { | |
134 | return s->ops->seekdir(&s->ctx, dir, off); | |
135 | } | |
136 | ||
137 | static int v9fs_do_readv(V9fsState *s, int fd, const struct iovec *iov, | |
138 | int iovcnt) | |
139 | { | |
140 | return s->ops->readv(&s->ctx, fd, iov, iovcnt); | |
141 | } | |
142 | ||
143 | static off_t v9fs_do_lseek(V9fsState *s, int fd, off_t offset, int whence) | |
144 | { | |
145 | return s->ops->lseek(&s->ctx, fd, offset, whence); | |
146 | } | |
147 | ||
8449360c AL |
148 | static int v9fs_do_writev(V9fsState *s, int fd, const struct iovec *iov, |
149 | int iovcnt) | |
150 | { | |
151 | return s->ops->writev(&s->ctx, fd, iov, iovcnt); | |
152 | } | |
153 | ||
c494dd6f AL |
154 | static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
155 | { | |
e95ead32 VJ |
156 | FsCred cred; |
157 | cred_init(&cred); | |
158 | cred.fc_mode = mode; | |
159 | return s->ops->chmod(&s->ctx, path->data, &cred); | |
c494dd6f AL |
160 | } |
161 | ||
5268cecc MK |
162 | static int v9fs_do_mknod(V9fsState *s, char *name, |
163 | mode_t mode, dev_t dev, uid_t uid, gid_t gid) | |
c494dd6f | 164 | { |
1c293312 VJ |
165 | FsCred cred; |
166 | cred_init(&cred); | |
5268cecc MK |
167 | cred.fc_uid = uid; |
168 | cred.fc_gid = gid; | |
1c293312 VJ |
169 | cred.fc_mode = mode; |
170 | cred.fc_rdev = dev; | |
5268cecc | 171 | return s->ops->mknod(&s->ctx, name, &cred); |
c494dd6f AL |
172 | } |
173 | ||
b67592ea MK |
174 | static int v9fs_do_mkdir(V9fsState *s, char *name, mode_t mode, |
175 | uid_t uid, gid_t gid) | |
c494dd6f | 176 | { |
00ec5c37 VJ |
177 | FsCred cred; |
178 | ||
179 | cred_init(&cred); | |
b67592ea MK |
180 | cred.fc_uid = uid; |
181 | cred.fc_gid = gid; | |
182 | cred.fc_mode = mode; | |
00ec5c37 | 183 | |
b67592ea | 184 | return s->ops->mkdir(&s->ctx, name, &cred); |
c494dd6f AL |
185 | } |
186 | ||
187 | static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) | |
188 | { | |
189 | return s->ops->fstat(&s->ctx, fd, stbuf); | |
190 | } | |
191 | ||
c1568af5 VJ |
192 | static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid, |
193 | int flags, int mode) | |
c494dd6f | 194 | { |
4750a96f | 195 | FsCred cred; |
4750a96f VJ |
196 | |
197 | cred_init(&cred); | |
c1568af5 VJ |
198 | cred.fc_uid = uid; |
199 | cred.fc_gid = gid; | |
200 | cred.fc_mode = mode & 07777; | |
201 | flags = flags; | |
4750a96f | 202 | |
c1568af5 | 203 | return s->ops->open2(&s->ctx, fullname, flags, &cred); |
c494dd6f AL |
204 | } |
205 | ||
08c60fc9 VJ |
206 | static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
207 | const char *oldpath, const char *newpath, gid_t gid) | |
c494dd6f | 208 | { |
879c2813 VJ |
209 | FsCred cred; |
210 | cred_init(&cred); | |
08c60fc9 VJ |
211 | cred.fc_uid = fidp->uid; |
212 | cred.fc_gid = gid; | |
213 | cred.fc_mode = 0777; | |
879c2813 | 214 | |
08c60fc9 | 215 | return s->ops->symlink(&s->ctx, oldpath, newpath, &cred); |
c494dd6f AL |
216 | } |
217 | ||
218 | static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) | |
219 | { | |
220 | return s->ops->link(&s->ctx, oldpath->data, newpath->data); | |
221 | } | |
222 | ||
8cf89e00 AL |
223 | static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
224 | { | |
225 | return s->ops->truncate(&s->ctx, path->data, size); | |
226 | } | |
227 | ||
228 | static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, | |
229 | V9fsString *newpath) | |
230 | { | |
231 | return s->ops->rename(&s->ctx, oldpath->data, newpath->data); | |
232 | } | |
233 | ||
234 | static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) | |
235 | { | |
f7613bee VJ |
236 | FsCred cred; |
237 | cred_init(&cred); | |
238 | cred.fc_uid = uid; | |
239 | cred.fc_gid = gid; | |
240 | ||
241 | return s->ops->chown(&s->ctx, path->data, &cred); | |
8cf89e00 AL |
242 | } |
243 | ||
8fc39ae4 SK |
244 | static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
245 | const struct timespec times[2]) | |
8cf89e00 | 246 | { |
8fc39ae4 | 247 | return s->ops->utimensat(&s->ctx, path->data, times); |
8cf89e00 AL |
248 | } |
249 | ||
5bae1900 AL |
250 | static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
251 | { | |
252 | return s->ops->remove(&s->ctx, path->data); | |
253 | } | |
254 | ||
8cf89e00 AL |
255 | static int v9fs_do_fsync(V9fsState *s, int fd) |
256 | { | |
257 | return s->ops->fsync(&s->ctx, fd); | |
258 | } | |
259 | ||
5e94c103 MK |
260 | static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
261 | { | |
262 | return s->ops->statfs(&s->ctx, path->data, stbuf); | |
263 | } | |
264 | ||
fa32ef88 AK |
265 | static ssize_t v9fs_do_lgetxattr(V9fsState *s, V9fsString *path, |
266 | V9fsString *xattr_name, | |
267 | void *value, size_t size) | |
268 | { | |
269 | return s->ops->lgetxattr(&s->ctx, path->data, | |
270 | xattr_name->data, value, size); | |
271 | } | |
272 | ||
273 | static ssize_t v9fs_do_llistxattr(V9fsState *s, V9fsString *path, | |
274 | void *value, size_t size) | |
275 | { | |
276 | return s->ops->llistxattr(&s->ctx, path->data, | |
277 | value, size); | |
278 | } | |
279 | ||
10b468bd AK |
280 | static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
281 | V9fsString *xattr_name, | |
282 | void *value, size_t size, int flags) | |
283 | { | |
284 | return s->ops->lsetxattr(&s->ctx, path->data, | |
285 | xattr_name->data, value, size, flags); | |
286 | } | |
287 | ||
9ed3ef26 AK |
288 | static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path, |
289 | V9fsString *xattr_name) | |
290 | { | |
291 | return s->ops->lremovexattr(&s->ctx, path->data, | |
292 | xattr_name->data); | |
293 | } | |
294 | ||
295 | ||
a03f7874 AL |
296 | static void v9fs_string_init(V9fsString *str) |
297 | { | |
298 | str->data = NULL; | |
299 | str->size = 0; | |
300 | } | |
301 | ||
302 | static void v9fs_string_free(V9fsString *str) | |
303 | { | |
304 | qemu_free(str->data); | |
305 | str->data = NULL; | |
306 | str->size = 0; | |
307 | } | |
308 | ||
309 | static void v9fs_string_null(V9fsString *str) | |
310 | { | |
311 | v9fs_string_free(str); | |
312 | } | |
313 | ||
314 | static int number_to_string(void *arg, char type) | |
315 | { | |
316 | unsigned int ret = 0; | |
317 | ||
318 | switch (type) { | |
319 | case 'u': { | |
320 | unsigned int num = *(unsigned int *)arg; | |
321 | ||
322 | do { | |
323 | ret++; | |
324 | num = num/10; | |
325 | } while (num); | |
326 | break; | |
327 | } | |
328 | default: | |
329 | printf("Number_to_string: Unknown number format\n"); | |
330 | return -1; | |
331 | } | |
332 | ||
333 | return ret; | |
334 | } | |
335 | ||
c9ba47dc SW |
336 | static int GCC_FMT_ATTR(2, 0) |
337 | v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
a03f7874 AL |
338 | { |
339 | va_list ap2; | |
340 | char *iter = (char *)fmt; | |
341 | int len = 0; | |
342 | int nr_args = 0; | |
343 | char *arg_char_ptr; | |
344 | unsigned int arg_uint; | |
345 | ||
346 | /* Find the number of %'s that denotes an argument */ | |
347 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
348 | nr_args++; | |
349 | iter++; | |
350 | } | |
351 | ||
352 | len = strlen(fmt) - 2*nr_args; | |
353 | ||
354 | if (!nr_args) { | |
355 | goto alloc_print; | |
356 | } | |
357 | ||
358 | va_copy(ap2, ap); | |
359 | ||
360 | iter = (char *)fmt; | |
361 | ||
362 | /* Now parse the format string */ | |
363 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
364 | iter++; | |
365 | switch (*iter) { | |
366 | case 'u': | |
367 | arg_uint = va_arg(ap2, unsigned int); | |
368 | len += number_to_string((void *)&arg_uint, 'u'); | |
369 | break; | |
370 | case 's': | |
371 | arg_char_ptr = va_arg(ap2, char *); | |
372 | len += strlen(arg_char_ptr); | |
373 | break; | |
374 | case 'c': | |
375 | len += 1; | |
376 | break; | |
377 | default: | |
378 | fprintf(stderr, | |
379 | "v9fs_string_alloc_printf:Incorrect format %c", *iter); | |
380 | return -1; | |
381 | } | |
382 | iter++; | |
383 | } | |
384 | ||
385 | alloc_print: | |
386 | *strp = qemu_malloc((len + 1) * sizeof(**strp)); | |
387 | ||
388 | return vsprintf(*strp, fmt, ap); | |
389 | } | |
390 | ||
c9ba47dc SW |
391 | static void GCC_FMT_ATTR(2, 3) |
392 | v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
a03f7874 AL |
393 | { |
394 | va_list ap; | |
395 | int err; | |
396 | ||
397 | v9fs_string_free(str); | |
398 | ||
399 | va_start(ap, fmt); | |
400 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
401 | BUG_ON(err == -1); | |
402 | va_end(ap); | |
403 | ||
404 | str->size = err; | |
405 | } | |
406 | ||
407 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
408 | { | |
409 | v9fs_string_free(lhs); | |
410 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
411 | } | |
412 | ||
413 | static size_t v9fs_string_size(V9fsString *str) | |
414 | { | |
415 | return str->size; | |
416 | } | |
417 | ||
286d5652 AL |
418 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
419 | { | |
420 | V9fsFidState *f; | |
421 | ||
422 | for (f = s->fid_list; f; f = f->next) { | |
423 | if (f->fid == fid) { | |
286d5652 AL |
424 | return f; |
425 | } | |
426 | } | |
427 | ||
428 | return NULL; | |
429 | } | |
430 | ||
431 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
432 | { | |
433 | V9fsFidState *f; | |
434 | ||
435 | f = lookup_fid(s, fid); | |
436 | if (f) { | |
437 | return NULL; | |
438 | } | |
439 | ||
440 | f = qemu_mallocz(sizeof(V9fsFidState)); | |
441 | ||
442 | f->fid = fid; | |
d62dbb51 | 443 | f->fid_type = P9_FID_NONE; |
286d5652 AL |
444 | |
445 | f->next = s->fid_list; | |
446 | s->fid_list = f; | |
447 | ||
448 | return f; | |
449 | } | |
450 | ||
10b468bd AK |
451 | static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
452 | { | |
453 | int retval = 0; | |
454 | ||
455 | if (fidp->fs.xattr.copied_len == -1) { | |
456 | /* getxattr/listxattr fid */ | |
457 | goto free_value; | |
458 | } | |
459 | /* | |
460 | * if this is fid for setxattr. clunk should | |
461 | * result in setxattr localcall | |
462 | */ | |
463 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
464 | /* clunk after partial write */ | |
465 | retval = -EINVAL; | |
466 | goto free_out; | |
467 | } | |
9ed3ef26 AK |
468 | if (fidp->fs.xattr.len) { |
469 | retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, | |
470 | fidp->fs.xattr.value, | |
471 | fidp->fs.xattr.len, | |
472 | fidp->fs.xattr.flags); | |
473 | } else { | |
474 | retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); | |
475 | } | |
10b468bd AK |
476 | free_out: |
477 | v9fs_string_free(&fidp->fs.xattr.name); | |
478 | free_value: | |
479 | if (fidp->fs.xattr.value) { | |
480 | qemu_free(fidp->fs.xattr.value); | |
481 | } | |
482 | return retval; | |
483 | } | |
484 | ||
286d5652 AL |
485 | static int free_fid(V9fsState *s, int32_t fid) |
486 | { | |
10b468bd | 487 | int retval = 0; |
286d5652 AL |
488 | V9fsFidState **fidpp, *fidp; |
489 | ||
490 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
491 | if ((*fidpp)->fid == fid) { | |
492 | break; | |
493 | } | |
494 | } | |
495 | ||
496 | if (*fidpp == NULL) { | |
497 | return -ENOENT; | |
498 | } | |
499 | ||
500 | fidp = *fidpp; | |
501 | *fidpp = fidp->next; | |
502 | ||
d62dbb51 AK |
503 | if (fidp->fid_type == P9_FID_FILE) { |
504 | v9fs_do_close(s, fidp->fs.fd); | |
505 | } else if (fidp->fid_type == P9_FID_DIR) { | |
506 | v9fs_do_closedir(s, fidp->fs.dir); | |
507 | } else if (fidp->fid_type == P9_FID_XATTR) { | |
10b468bd | 508 | retval = v9fs_xattr_fid_clunk(s, fidp); |
286d5652 AL |
509 | } |
510 | v9fs_string_free(&fidp->path); | |
511 | qemu_free(fidp); | |
512 | ||
10b468bd | 513 | return retval; |
286d5652 AL |
514 | } |
515 | ||
516 | #define P9_QID_TYPE_DIR 0x80 | |
517 | #define P9_QID_TYPE_SYMLINK 0x02 | |
518 | ||
519 | #define P9_STAT_MODE_DIR 0x80000000 | |
520 | #define P9_STAT_MODE_APPEND 0x40000000 | |
521 | #define P9_STAT_MODE_EXCL 0x20000000 | |
522 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
523 | #define P9_STAT_MODE_AUTH 0x08000000 | |
524 | #define P9_STAT_MODE_TMP 0x04000000 | |
525 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
526 | #define P9_STAT_MODE_LINK 0x01000000 | |
527 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
528 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
529 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
530 | #define P9_STAT_MODE_SETUID 0x00080000 | |
531 | #define P9_STAT_MODE_SETGID 0x00040000 | |
532 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
533 | ||
534 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
535 | P9_STAT_MODE_SYMLINK | \ | |
536 | P9_STAT_MODE_LINK | \ | |
537 | P9_STAT_MODE_DEVICE | \ | |
538 | P9_STAT_MODE_NAMED_PIPE | \ | |
539 | P9_STAT_MODE_SOCKET) | |
540 | ||
541 | /* This is the algorithm from ufs in spfs */ | |
542 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
543 | { | |
544 | size_t size; | |
545 | ||
546 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
547 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
548 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
549 | qidp->type = 0; | |
550 | if (S_ISDIR(stbuf->st_mode)) { | |
551 | qidp->type |= P9_QID_TYPE_DIR; | |
552 | } | |
553 | if (S_ISLNK(stbuf->st_mode)) { | |
554 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
555 | } | |
556 | } | |
557 | ||
558 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
559 | { | |
560 | struct stat stbuf; | |
561 | int err; | |
562 | ||
563 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
564 | if (err) { | |
565 | return err; | |
566 | } | |
567 | ||
568 | stat_to_qid(&stbuf, qidp); | |
569 | return 0; | |
570 | } | |
571 | ||
9f107513 AL |
572 | static V9fsPDU *alloc_pdu(V9fsState *s) |
573 | { | |
574 | V9fsPDU *pdu = NULL; | |
575 | ||
576 | if (!QLIST_EMPTY(&s->free_list)) { | |
577 | pdu = QLIST_FIRST(&s->free_list); | |
578 | QLIST_REMOVE(pdu, next); | |
579 | } | |
580 | return pdu; | |
581 | } | |
582 | ||
583 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
584 | { | |
585 | if (pdu) { | |
586 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
587 | } | |
588 | } | |
589 | ||
590 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
591 | size_t offset, size_t size, int pack) | |
592 | { | |
593 | int i = 0; | |
594 | size_t copied = 0; | |
595 | ||
596 | for (i = 0; size && i < sg_count; i++) { | |
597 | size_t len; | |
598 | if (offset >= sg[i].iov_len) { | |
599 | /* skip this sg */ | |
600 | offset -= sg[i].iov_len; | |
601 | continue; | |
602 | } else { | |
603 | len = MIN(sg[i].iov_len - offset, size); | |
604 | if (pack) { | |
605 | memcpy(sg[i].iov_base + offset, addr, len); | |
606 | } else { | |
607 | memcpy(addr, sg[i].iov_base + offset, len); | |
608 | } | |
609 | size -= len; | |
610 | copied += len; | |
611 | addr += len; | |
612 | if (size) { | |
613 | offset = 0; | |
614 | continue; | |
615 | } | |
616 | } | |
617 | } | |
618 | ||
619 | return copied; | |
620 | } | |
621 | ||
405a549a AL |
622 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
623 | { | |
624 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
625 | offset, size, 0); | |
626 | } | |
627 | ||
628 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
629 | size_t size) | |
630 | { | |
631 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
632 | offset, size, 1); | |
633 | } | |
634 | ||
635 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
636 | { | |
637 | size_t pos = 0; | |
638 | int i, j; | |
639 | struct iovec *src_sg; | |
640 | unsigned int num; | |
641 | ||
642 | if (rx) { | |
643 | src_sg = pdu->elem.in_sg; | |
644 | num = pdu->elem.in_num; | |
645 | } else { | |
646 | src_sg = pdu->elem.out_sg; | |
647 | num = pdu->elem.out_num; | |
648 | } | |
649 | ||
650 | j = 0; | |
651 | for (i = 0; i < num; i++) { | |
652 | if (offset <= pos) { | |
653 | sg[j].iov_base = src_sg[i].iov_base; | |
654 | sg[j].iov_len = src_sg[i].iov_len; | |
655 | j++; | |
656 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
657 | sg[j].iov_base = src_sg[i].iov_base; | |
658 | sg[j].iov_len = src_sg[i].iov_len; | |
659 | sg[j].iov_base += (offset - pos); | |
660 | sg[j].iov_len -= (offset - pos); | |
661 | j++; | |
662 | } | |
663 | pos += src_sg[i].iov_len; | |
664 | } | |
665 | ||
666 | return j; | |
667 | } | |
668 | ||
669 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
670 | { | |
671 | size_t old_offset = offset; | |
672 | va_list ap; | |
673 | int i; | |
674 | ||
675 | va_start(ap, fmt); | |
676 | for (i = 0; fmt[i]; i++) { | |
677 | switch (fmt[i]) { | |
678 | case 'b': { | |
679 | uint8_t *valp = va_arg(ap, uint8_t *); | |
680 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
681 | break; | |
682 | } | |
683 | case 'w': { | |
684 | uint16_t val, *valp; | |
685 | valp = va_arg(ap, uint16_t *); | |
686 | val = le16_to_cpupu(valp); | |
687 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
688 | *valp = val; | |
689 | break; | |
690 | } | |
691 | case 'd': { | |
692 | uint32_t val, *valp; | |
693 | valp = va_arg(ap, uint32_t *); | |
694 | val = le32_to_cpupu(valp); | |
695 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
696 | *valp = val; | |
697 | break; | |
698 | } | |
699 | case 'q': { | |
700 | uint64_t val, *valp; | |
701 | valp = va_arg(ap, uint64_t *); | |
702 | val = le64_to_cpup(valp); | |
703 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); | |
704 | *valp = val; | |
705 | break; | |
706 | } | |
707 | case 'v': { | |
708 | struct iovec *iov = va_arg(ap, struct iovec *); | |
709 | int *iovcnt = va_arg(ap, int *); | |
710 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
711 | break; | |
712 | } | |
713 | case 's': { | |
714 | V9fsString *str = va_arg(ap, V9fsString *); | |
715 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
716 | /* FIXME: sanity check str->size */ | |
717 | str->data = qemu_malloc(str->size + 1); | |
718 | offset += pdu_unpack(str->data, pdu, offset, str->size); | |
719 | str->data[str->size] = 0; | |
720 | break; | |
721 | } | |
722 | case 'Q': { | |
723 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
724 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
725 | &qidp->type, &qidp->version, &qidp->path); | |
726 | break; | |
727 | } | |
728 | case 'S': { | |
729 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
730 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
731 | &statp->size, &statp->type, &statp->dev, | |
732 | &statp->qid, &statp->mode, &statp->atime, | |
733 | &statp->mtime, &statp->length, | |
734 | &statp->name, &statp->uid, &statp->gid, | |
735 | &statp->muid, &statp->extension, | |
736 | &statp->n_uid, &statp->n_gid, | |
737 | &statp->n_muid); | |
738 | break; | |
739 | } | |
c79ce737 SK |
740 | case 'I': { |
741 | V9fsIattr *iattr = va_arg(ap, V9fsIattr *); | |
742 | offset += pdu_unmarshal(pdu, offset, "ddddqqqqq", | |
743 | &iattr->valid, &iattr->mode, | |
744 | &iattr->uid, &iattr->gid, &iattr->size, | |
745 | &iattr->atime_sec, &iattr->atime_nsec, | |
746 | &iattr->mtime_sec, &iattr->mtime_nsec); | |
747 | break; | |
748 | } | |
405a549a AL |
749 | default: |
750 | break; | |
751 | } | |
752 | } | |
753 | ||
754 | va_end(ap); | |
755 | ||
756 | return offset - old_offset; | |
757 | } | |
758 | ||
759 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
760 | { | |
761 | size_t old_offset = offset; | |
762 | va_list ap; | |
763 | int i; | |
764 | ||
765 | va_start(ap, fmt); | |
766 | for (i = 0; fmt[i]; i++) { | |
767 | switch (fmt[i]) { | |
768 | case 'b': { | |
769 | uint8_t val = va_arg(ap, int); | |
770 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
771 | break; | |
772 | } | |
773 | case 'w': { | |
774 | uint16_t val; | |
775 | cpu_to_le16w(&val, va_arg(ap, int)); | |
776 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
777 | break; | |
778 | } | |
779 | case 'd': { | |
780 | uint32_t val; | |
781 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
782 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
783 | break; | |
784 | } | |
785 | case 'q': { | |
786 | uint64_t val; | |
787 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
788 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
789 | break; | |
790 | } | |
791 | case 'v': { | |
792 | struct iovec *iov = va_arg(ap, struct iovec *); | |
793 | int *iovcnt = va_arg(ap, int *); | |
794 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
795 | break; | |
796 | } | |
797 | case 's': { | |
798 | V9fsString *str = va_arg(ap, V9fsString *); | |
799 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
800 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
801 | break; | |
802 | } | |
803 | case 'Q': { | |
804 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
805 | offset += pdu_marshal(pdu, offset, "bdq", | |
806 | qidp->type, qidp->version, qidp->path); | |
807 | break; | |
808 | } | |
809 | case 'S': { | |
810 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
811 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
812 | statp->size, statp->type, statp->dev, | |
813 | &statp->qid, statp->mode, statp->atime, | |
814 | statp->mtime, statp->length, &statp->name, | |
815 | &statp->uid, &statp->gid, &statp->muid, | |
816 | &statp->extension, statp->n_uid, | |
817 | statp->n_gid, statp->n_muid); | |
818 | break; | |
819 | } | |
00ede4c2 SK |
820 | case 'A': { |
821 | V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); | |
822 | offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq", | |
823 | statp->st_result_mask, | |
824 | &statp->qid, statp->st_mode, | |
825 | statp->st_uid, statp->st_gid, | |
826 | statp->st_nlink, statp->st_rdev, | |
827 | statp->st_size, statp->st_blksize, statp->st_blocks, | |
828 | statp->st_atime_sec, statp->st_atime_nsec, | |
829 | statp->st_mtime_sec, statp->st_mtime_nsec, | |
830 | statp->st_ctime_sec, statp->st_ctime_nsec, | |
831 | statp->st_btime_sec, statp->st_btime_nsec, | |
832 | statp->st_gen, statp->st_data_version); | |
833 | break; | |
834 | } | |
405a549a AL |
835 | default: |
836 | break; | |
837 | } | |
838 | } | |
839 | va_end(ap); | |
840 | ||
841 | return offset - old_offset; | |
842 | } | |
843 | ||
844 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
845 | { | |
846 | int8_t id = pdu->id + 1; /* Response */ | |
847 | ||
848 | if (len < 0) { | |
405a549a | 849 | int err = -len; |
8f4d1ca5 | 850 | len = 7; |
405a549a | 851 | |
8f4d1ca5 AB |
852 | if (s->proto_version != V9FS_PROTO_2000L) { |
853 | V9fsString str; | |
854 | ||
855 | str.data = strerror(err); | |
856 | str.size = strlen(str.data); | |
857 | ||
858 | len += pdu_marshal(pdu, len, "s", &str); | |
859 | id = P9_RERROR; | |
860 | } | |
405a549a | 861 | |
cf03eb2c | 862 | len += pdu_marshal(pdu, len, "d", err); |
405a549a | 863 | |
8f4d1ca5 AB |
864 | if (s->proto_version == V9FS_PROTO_2000L) { |
865 | id = P9_RLERROR; | |
866 | } | |
405a549a AL |
867 | } |
868 | ||
869 | /* fill out the header */ | |
870 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
871 | ||
872 | /* keep these in sync */ | |
873 | pdu->size = len; | |
874 | pdu->id = id; | |
875 | ||
876 | /* push onto queue and notify */ | |
877 | virtqueue_push(s->vq, &pdu->elem, len); | |
878 | ||
879 | /* FIXME: we should batch these completions */ | |
880 | virtio_notify(&s->vdev, s->vq); | |
881 | ||
882 | free_pdu(s, pdu); | |
883 | } | |
884 | ||
bb9e3216 AL |
885 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
886 | { | |
887 | mode_t ret; | |
888 | ||
889 | ret = mode & 0777; | |
890 | if (mode & P9_STAT_MODE_DIR) { | |
891 | ret |= S_IFDIR; | |
892 | } | |
893 | ||
cf03eb2c AB |
894 | if (mode & P9_STAT_MODE_SYMLINK) { |
895 | ret |= S_IFLNK; | |
896 | } | |
897 | if (mode & P9_STAT_MODE_SOCKET) { | |
898 | ret |= S_IFSOCK; | |
899 | } | |
900 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
901 | ret |= S_IFIFO; | |
902 | } | |
903 | if (mode & P9_STAT_MODE_DEVICE) { | |
904 | if (extension && extension->data[0] == 'c') { | |
905 | ret |= S_IFCHR; | |
906 | } else { | |
907 | ret |= S_IFBLK; | |
bb9e3216 AL |
908 | } |
909 | } | |
910 | ||
911 | if (!(ret&~0777)) { | |
912 | ret |= S_IFREG; | |
913 | } | |
914 | ||
915 | if (mode & P9_STAT_MODE_SETUID) { | |
916 | ret |= S_ISUID; | |
917 | } | |
918 | if (mode & P9_STAT_MODE_SETGID) { | |
919 | ret |= S_ISGID; | |
920 | } | |
921 | if (mode & P9_STAT_MODE_SETVTX) { | |
922 | ret |= S_ISVTX; | |
923 | } | |
924 | ||
925 | return ret; | |
926 | } | |
927 | ||
928 | static int donttouch_stat(V9fsStat *stat) | |
929 | { | |
930 | if (stat->type == -1 && | |
931 | stat->dev == -1 && | |
932 | stat->qid.type == -1 && | |
933 | stat->qid.version == -1 && | |
934 | stat->qid.path == -1 && | |
935 | stat->mode == -1 && | |
936 | stat->atime == -1 && | |
937 | stat->mtime == -1 && | |
938 | stat->length == -1 && | |
939 | !stat->name.size && | |
940 | !stat->uid.size && | |
941 | !stat->gid.size && | |
942 | !stat->muid.size && | |
943 | stat->n_uid == -1 && | |
944 | stat->n_gid == -1 && | |
945 | stat->n_muid == -1) { | |
946 | return 1; | |
947 | } | |
948 | ||
949 | return 0; | |
950 | } | |
951 | ||
952 | static void v9fs_stat_free(V9fsStat *stat) | |
953 | { | |
954 | v9fs_string_free(&stat->name); | |
955 | v9fs_string_free(&stat->uid); | |
956 | v9fs_string_free(&stat->gid); | |
957 | v9fs_string_free(&stat->muid); | |
958 | v9fs_string_free(&stat->extension); | |
959 | } | |
960 | ||
961 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
962 | { | |
963 | uint32_t mode; | |
964 | ||
965 | mode = stbuf->st_mode & 0777; | |
966 | if (S_ISDIR(stbuf->st_mode)) { | |
967 | mode |= P9_STAT_MODE_DIR; | |
968 | } | |
969 | ||
cf03eb2c AB |
970 | if (S_ISLNK(stbuf->st_mode)) { |
971 | mode |= P9_STAT_MODE_SYMLINK; | |
972 | } | |
bb9e3216 | 973 | |
cf03eb2c AB |
974 | if (S_ISSOCK(stbuf->st_mode)) { |
975 | mode |= P9_STAT_MODE_SOCKET; | |
976 | } | |
bb9e3216 | 977 | |
cf03eb2c AB |
978 | if (S_ISFIFO(stbuf->st_mode)) { |
979 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
980 | } | |
bb9e3216 | 981 | |
cf03eb2c AB |
982 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
983 | mode |= P9_STAT_MODE_DEVICE; | |
984 | } | |
bb9e3216 | 985 | |
cf03eb2c AB |
986 | if (stbuf->st_mode & S_ISUID) { |
987 | mode |= P9_STAT_MODE_SETUID; | |
988 | } | |
bb9e3216 | 989 | |
cf03eb2c AB |
990 | if (stbuf->st_mode & S_ISGID) { |
991 | mode |= P9_STAT_MODE_SETGID; | |
992 | } | |
bb9e3216 | 993 | |
cf03eb2c AB |
994 | if (stbuf->st_mode & S_ISVTX) { |
995 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
996 | } |
997 | ||
998 | return mode; | |
999 | } | |
1000 | ||
1001 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
1002 | const struct stat *stbuf, | |
1003 | V9fsStat *v9stat) | |
1004 | { | |
1005 | int err; | |
1006 | const char *str; | |
1007 | ||
1008 | memset(v9stat, 0, sizeof(*v9stat)); | |
1009 | ||
1010 | stat_to_qid(stbuf, &v9stat->qid); | |
1011 | v9stat->mode = stat_to_v9mode(stbuf); | |
1012 | v9stat->atime = stbuf->st_atime; | |
1013 | v9stat->mtime = stbuf->st_mtime; | |
1014 | v9stat->length = stbuf->st_size; | |
1015 | ||
1016 | v9fs_string_null(&v9stat->uid); | |
1017 | v9fs_string_null(&v9stat->gid); | |
1018 | v9fs_string_null(&v9stat->muid); | |
1019 | ||
cf03eb2c AB |
1020 | v9stat->n_uid = stbuf->st_uid; |
1021 | v9stat->n_gid = stbuf->st_gid; | |
1022 | v9stat->n_muid = 0; | |
bb9e3216 | 1023 | |
cf03eb2c | 1024 | v9fs_string_null(&v9stat->extension); |
bb9e3216 | 1025 | |
cf03eb2c AB |
1026 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
1027 | err = v9fs_do_readlink(s, name, &v9stat->extension); | |
1028 | if (err == -1) { | |
1029 | err = -errno; | |
1030 | return err; | |
bb9e3216 | 1031 | } |
cf03eb2c AB |
1032 | v9stat->extension.data[err] = 0; |
1033 | v9stat->extension.size = err; | |
1034 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { | |
1035 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
1036 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
1037 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
1038 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
1039 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
1040 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
1041 | } |
1042 | ||
1043 | str = strrchr(name->data, '/'); | |
1044 | if (str) { | |
1045 | str += 1; | |
1046 | } else { | |
1047 | str = name->data; | |
1048 | } | |
1049 | ||
1050 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
1051 | ||
1052 | v9stat->size = 61 + | |
1053 | v9fs_string_size(&v9stat->name) + | |
1054 | v9fs_string_size(&v9stat->uid) + | |
1055 | v9fs_string_size(&v9stat->gid) + | |
1056 | v9fs_string_size(&v9stat->muid) + | |
1057 | v9fs_string_size(&v9stat->extension); | |
1058 | return 0; | |
1059 | } | |
1060 | ||
00ede4c2 SK |
1061 | #define P9_STATS_MODE 0x00000001ULL |
1062 | #define P9_STATS_NLINK 0x00000002ULL | |
1063 | #define P9_STATS_UID 0x00000004ULL | |
1064 | #define P9_STATS_GID 0x00000008ULL | |
1065 | #define P9_STATS_RDEV 0x00000010ULL | |
1066 | #define P9_STATS_ATIME 0x00000020ULL | |
1067 | #define P9_STATS_MTIME 0x00000040ULL | |
1068 | #define P9_STATS_CTIME 0x00000080ULL | |
1069 | #define P9_STATS_INO 0x00000100ULL | |
1070 | #define P9_STATS_SIZE 0x00000200ULL | |
1071 | #define P9_STATS_BLOCKS 0x00000400ULL | |
1072 | ||
1073 | #define P9_STATS_BTIME 0x00000800ULL | |
1074 | #define P9_STATS_GEN 0x00001000ULL | |
1075 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
1076 | ||
1077 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
1078 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
1079 | ||
1080 | ||
1081 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, | |
1082 | V9fsStatDotl *v9lstat) | |
1083 | { | |
1084 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
1085 | ||
1086 | v9lstat->st_mode = stbuf->st_mode; | |
1087 | v9lstat->st_nlink = stbuf->st_nlink; | |
1088 | v9lstat->st_uid = stbuf->st_uid; | |
1089 | v9lstat->st_gid = stbuf->st_gid; | |
1090 | v9lstat->st_rdev = stbuf->st_rdev; | |
1091 | v9lstat->st_size = stbuf->st_size; | |
1092 | v9lstat->st_blksize = stbuf->st_blksize; | |
1093 | v9lstat->st_blocks = stbuf->st_blocks; | |
1094 | v9lstat->st_atime_sec = stbuf->st_atime; | |
1095 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
1096 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
1097 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
1098 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
1099 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
1100 | /* Currently we only support BASIC fields in stat */ | |
1101 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
1102 | ||
1103 | stat_to_qid(stbuf, &v9lstat->qid); | |
1104 | } | |
1105 | ||
1f5a89bf AL |
1106 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1107 | { | |
1108 | while (len && *iovcnt) { | |
1109 | if (len < sg->iov_len) { | |
1110 | sg->iov_len -= len; | |
1111 | sg->iov_base += len; | |
1112 | len = 0; | |
1113 | } else { | |
1114 | len -= sg->iov_len; | |
1115 | sg++; | |
1116 | *iovcnt -= 1; | |
1117 | } | |
1118 | } | |
1119 | ||
1120 | return sg; | |
1121 | } | |
1122 | ||
1123 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
1124 | { | |
1125 | int i; | |
1126 | int total = 0; | |
1127 | ||
1128 | for (i = 0; i < *cnt; i++) { | |
1129 | if ((total + sg[i].iov_len) > cap) { | |
1130 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
1131 | i++; | |
1132 | break; | |
1133 | } | |
1134 | total += sg[i].iov_len; | |
1135 | } | |
1136 | ||
1137 | *cnt = i; | |
1138 | ||
1139 | return sg; | |
1140 | } | |
1141 | ||
1142 | static void print_sg(struct iovec *sg, int cnt) | |
1143 | { | |
1144 | int i; | |
1145 | ||
1146 | printf("sg[%d]: {", cnt); | |
1147 | for (i = 0; i < cnt; i++) { | |
1148 | if (i) { | |
1149 | printf(", "); | |
1150 | } | |
1151 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1152 | } | |
1153 | printf("}\n"); | |
1154 | } | |
1155 | ||
8cf89e00 AL |
1156 | static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1157 | { | |
1158 | V9fsString str; | |
1159 | v9fs_string_init(&str); | |
1160 | v9fs_string_copy(&str, dst); | |
1161 | v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len); | |
1162 | v9fs_string_free(&str); | |
1163 | } | |
1164 | ||
9f107513 AL |
1165 | static void v9fs_version(V9fsState *s, V9fsPDU *pdu) |
1166 | { | |
92c1ad03 AL |
1167 | V9fsString version; |
1168 | size_t offset = 7; | |
1169 | ||
5e94c103 | 1170 | pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); |
92c1ad03 | 1171 | |
84151514 MK |
1172 | if (!strcmp(version.data, "9P2000.u")) { |
1173 | s->proto_version = V9FS_PROTO_2000U; | |
1174 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1175 | s->proto_version = V9FS_PROTO_2000L; | |
1176 | } else { | |
92c1ad03 | 1177 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 1178 | } |
92c1ad03 | 1179 | |
5e94c103 | 1180 | offset += pdu_marshal(pdu, offset, "ds", s->msize, &version); |
92c1ad03 AL |
1181 | complete_pdu(s, pdu, offset); |
1182 | ||
1183 | v9fs_string_free(&version); | |
9f107513 AL |
1184 | } |
1185 | ||
1186 | static void v9fs_attach(V9fsState *s, V9fsPDU *pdu) | |
1187 | { | |
955efc47 AL |
1188 | int32_t fid, afid, n_uname; |
1189 | V9fsString uname, aname; | |
1190 | V9fsFidState *fidp; | |
1191 | V9fsQID qid; | |
1192 | size_t offset = 7; | |
1193 | ssize_t err; | |
1194 | ||
1195 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
1196 | ||
1197 | fidp = alloc_fid(s, fid); | |
1198 | if (fidp == NULL) { | |
1199 | err = -EINVAL; | |
1200 | goto out; | |
9f107513 | 1201 | } |
955efc47 AL |
1202 | |
1203 | fidp->uid = n_uname; | |
1204 | ||
1205 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
1206 | err = fid_to_qid(s, fidp, &qid); | |
1207 | if (err) { | |
1208 | err = -EINVAL; | |
1209 | free_fid(s, fid); | |
1210 | goto out; | |
1211 | } | |
1212 | ||
1213 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
1214 | ||
1215 | err = offset; | |
1216 | out: | |
1217 | complete_pdu(s, pdu, err); | |
1218 | v9fs_string_free(&uname); | |
1219 | v9fs_string_free(&aname); | |
9f107513 AL |
1220 | } |
1221 | ||
4da7d3fa AL |
1222 | static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1223 | { | |
1224 | if (err == -1) { | |
1225 | err = -errno; | |
1226 | goto out; | |
1227 | } | |
1228 | ||
1229 | err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); | |
1230 | if (err) { | |
1231 | goto out; | |
1232 | } | |
1233 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); | |
1234 | err = vs->offset; | |
1235 | ||
1236 | out: | |
1237 | complete_pdu(s, vs->pdu, err); | |
1238 | v9fs_stat_free(&vs->v9stat); | |
1239 | qemu_free(vs); | |
1240 | } | |
1241 | ||
9f107513 AL |
1242 | static void v9fs_stat(V9fsState *s, V9fsPDU *pdu) |
1243 | { | |
4da7d3fa AL |
1244 | int32_t fid; |
1245 | V9fsStatState *vs; | |
1246 | ssize_t err = 0; | |
1247 | ||
1248 | vs = qemu_malloc(sizeof(*vs)); | |
1249 | vs->pdu = pdu; | |
1250 | vs->offset = 7; | |
1251 | ||
1252 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1253 | ||
1254 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1255 | ||
1256 | vs->fidp = lookup_fid(s, fid); | |
1257 | if (vs->fidp == NULL) { | |
1258 | err = -ENOENT; | |
1259 | goto out; | |
9f107513 | 1260 | } |
4da7d3fa AL |
1261 | |
1262 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1263 | v9fs_stat_post_lstat(s, vs, err); | |
1264 | return; | |
1265 | ||
1266 | out: | |
1267 | complete_pdu(s, vs->pdu, err); | |
1268 | v9fs_stat_free(&vs->v9stat); | |
1269 | qemu_free(vs); | |
9f107513 AL |
1270 | } |
1271 | ||
00ede4c2 SK |
1272 | static void v9fs_getattr_post_lstat(V9fsState *s, V9fsStatStateDotl *vs, |
1273 | int err) | |
1274 | { | |
1275 | if (err == -1) { | |
1276 | err = -errno; | |
1277 | goto out; | |
1278 | } | |
1279 | ||
1280 | stat_to_v9stat_dotl(s, &vs->stbuf, &vs->v9stat_dotl); | |
1281 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "A", &vs->v9stat_dotl); | |
1282 | err = vs->offset; | |
1283 | ||
1284 | out: | |
1285 | complete_pdu(s, vs->pdu, err); | |
1286 | qemu_free(vs); | |
1287 | } | |
1288 | ||
1289 | static void v9fs_getattr(V9fsState *s, V9fsPDU *pdu) | |
1290 | { | |
1291 | int32_t fid; | |
1292 | V9fsStatStateDotl *vs; | |
1293 | ssize_t err = 0; | |
1294 | V9fsFidState *fidp; | |
1295 | uint64_t request_mask; | |
1296 | ||
1297 | vs = qemu_malloc(sizeof(*vs)); | |
1298 | vs->pdu = pdu; | |
1299 | vs->offset = 7; | |
1300 | ||
1301 | memset(&vs->v9stat_dotl, 0, sizeof(vs->v9stat_dotl)); | |
1302 | ||
1303 | pdu_unmarshal(vs->pdu, vs->offset, "dq", &fid, &request_mask); | |
1304 | ||
1305 | fidp = lookup_fid(s, fid); | |
1306 | if (fidp == NULL) { | |
1307 | err = -ENOENT; | |
1308 | goto out; | |
1309 | } | |
1310 | ||
1311 | /* Currently we only support BASIC fields in stat, so there is no | |
1312 | * need to look at request_mask. | |
1313 | */ | |
1314 | err = v9fs_do_lstat(s, &fidp->path, &vs->stbuf); | |
1315 | v9fs_getattr_post_lstat(s, vs, err); | |
1316 | return; | |
1317 | ||
1318 | out: | |
1319 | complete_pdu(s, vs->pdu, err); | |
1320 | qemu_free(vs); | |
1321 | } | |
1322 | ||
c79ce737 SK |
1323 | /* From Linux kernel code */ |
1324 | #define ATTR_MODE (1 << 0) | |
1325 | #define ATTR_UID (1 << 1) | |
1326 | #define ATTR_GID (1 << 2) | |
1327 | #define ATTR_SIZE (1 << 3) | |
1328 | #define ATTR_ATIME (1 << 4) | |
1329 | #define ATTR_MTIME (1 << 5) | |
1330 | #define ATTR_CTIME (1 << 6) | |
1331 | #define ATTR_MASK 127 | |
1332 | #define ATTR_ATIME_SET (1 << 7) | |
1333 | #define ATTR_MTIME_SET (1 << 8) | |
1334 | ||
1335 | static void v9fs_setattr_post_truncate(V9fsState *s, V9fsSetattrState *vs, | |
1336 | int err) | |
1337 | { | |
1338 | if (err == -1) { | |
1339 | err = -errno; | |
1340 | goto out; | |
1341 | } | |
1342 | err = vs->offset; | |
1343 | ||
1344 | out: | |
1345 | complete_pdu(s, vs->pdu, err); | |
1346 | qemu_free(vs); | |
1347 | } | |
1348 | ||
1349 | static void v9fs_setattr_post_chown(V9fsState *s, V9fsSetattrState *vs, int err) | |
1350 | { | |
1351 | if (err == -1) { | |
1352 | err = -errno; | |
1353 | goto out; | |
1354 | } | |
1355 | ||
1356 | if (vs->v9iattr.valid & (ATTR_SIZE)) { | |
1357 | err = v9fs_do_truncate(s, &vs->fidp->path, vs->v9iattr.size); | |
1358 | } | |
1359 | v9fs_setattr_post_truncate(s, vs, err); | |
1360 | return; | |
1361 | ||
1362 | out: | |
1363 | complete_pdu(s, vs->pdu, err); | |
1364 | qemu_free(vs); | |
1365 | } | |
1366 | ||
1367 | static void v9fs_setattr_post_utimensat(V9fsState *s, V9fsSetattrState *vs, | |
1368 | int err) | |
1369 | { | |
1370 | if (err == -1) { | |
1371 | err = -errno; | |
1372 | goto out; | |
1373 | } | |
1374 | ||
1375 | /* If the only valid entry in iattr is ctime we can call | |
1376 | * chown(-1,-1) to update the ctime of the file | |
1377 | */ | |
1378 | if ((vs->v9iattr.valid & (ATTR_UID | ATTR_GID)) || | |
1379 | ((vs->v9iattr.valid & ATTR_CTIME) | |
1380 | && !((vs->v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { | |
1381 | if (!(vs->v9iattr.valid & ATTR_UID)) { | |
1382 | vs->v9iattr.uid = -1; | |
1383 | } | |
1384 | if (!(vs->v9iattr.valid & ATTR_GID)) { | |
1385 | vs->v9iattr.gid = -1; | |
1386 | } | |
1387 | err = v9fs_do_chown(s, &vs->fidp->path, vs->v9iattr.uid, | |
1388 | vs->v9iattr.gid); | |
1389 | } | |
1390 | v9fs_setattr_post_chown(s, vs, err); | |
1391 | return; | |
1392 | ||
1393 | out: | |
1394 | complete_pdu(s, vs->pdu, err); | |
1395 | qemu_free(vs); | |
1396 | } | |
1397 | ||
1398 | static void v9fs_setattr_post_chmod(V9fsState *s, V9fsSetattrState *vs, int err) | |
1399 | { | |
1400 | if (err == -1) { | |
1401 | err = -errno; | |
1402 | goto out; | |
1403 | } | |
1404 | ||
1405 | if (vs->v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) { | |
1406 | struct timespec times[2]; | |
1407 | if (vs->v9iattr.valid & ATTR_ATIME) { | |
1408 | if (vs->v9iattr.valid & ATTR_ATIME_SET) { | |
1409 | times[0].tv_sec = vs->v9iattr.atime_sec; | |
1410 | times[0].tv_nsec = vs->v9iattr.atime_nsec; | |
1411 | } else { | |
1412 | times[0].tv_nsec = UTIME_NOW; | |
1413 | } | |
1414 | } else { | |
1415 | times[0].tv_nsec = UTIME_OMIT; | |
1416 | } | |
1417 | ||
1418 | if (vs->v9iattr.valid & ATTR_MTIME) { | |
1419 | if (vs->v9iattr.valid & ATTR_MTIME_SET) { | |
1420 | times[1].tv_sec = vs->v9iattr.mtime_sec; | |
1421 | times[1].tv_nsec = vs->v9iattr.mtime_nsec; | |
1422 | } else { | |
1423 | times[1].tv_nsec = UTIME_NOW; | |
1424 | } | |
1425 | } else { | |
1426 | times[1].tv_nsec = UTIME_OMIT; | |
1427 | } | |
1428 | err = v9fs_do_utimensat(s, &vs->fidp->path, times); | |
1429 | } | |
1430 | v9fs_setattr_post_utimensat(s, vs, err); | |
1431 | return; | |
1432 | ||
1433 | out: | |
1434 | complete_pdu(s, vs->pdu, err); | |
1435 | qemu_free(vs); | |
1436 | } | |
1437 | ||
1438 | static void v9fs_setattr(V9fsState *s, V9fsPDU *pdu) | |
1439 | { | |
1440 | int32_t fid; | |
1441 | V9fsSetattrState *vs; | |
1442 | int err = 0; | |
1443 | ||
1444 | vs = qemu_malloc(sizeof(*vs)); | |
1445 | vs->pdu = pdu; | |
1446 | vs->offset = 7; | |
1447 | ||
1448 | pdu_unmarshal(pdu, vs->offset, "dI", &fid, &vs->v9iattr); | |
1449 | ||
1450 | vs->fidp = lookup_fid(s, fid); | |
1451 | if (vs->fidp == NULL) { | |
1452 | err = -EINVAL; | |
1453 | goto out; | |
1454 | } | |
1455 | ||
1456 | if (vs->v9iattr.valid & ATTR_MODE) { | |
1457 | err = v9fs_do_chmod(s, &vs->fidp->path, vs->v9iattr.mode); | |
1458 | } | |
1459 | ||
1460 | v9fs_setattr_post_chmod(s, vs, err); | |
1461 | return; | |
1462 | ||
1463 | out: | |
1464 | complete_pdu(s, vs->pdu, err); | |
1465 | qemu_free(vs); | |
1466 | } | |
1467 | ||
ff5e54c9 AL |
1468 | static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1469 | { | |
1470 | complete_pdu(s, vs->pdu, err); | |
1471 | ||
1472 | if (vs->nwnames) { | |
1473 | for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { | |
1474 | v9fs_string_free(&vs->wnames[vs->name_idx]); | |
1475 | } | |
1476 | ||
1477 | qemu_free(vs->wnames); | |
1478 | qemu_free(vs->qids); | |
1479 | } | |
1480 | } | |
1481 | ||
1482 | static void v9fs_walk_marshal(V9fsWalkState *vs) | |
1483 | { | |
1484 | int i; | |
1485 | vs->offset = 7; | |
1486 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames); | |
1487 | ||
1488 | for (i = 0; i < vs->nwnames; i++) { | |
1489 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]); | |
1490 | } | |
1491 | } | |
1492 | ||
1493 | static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1494 | int err) | |
1495 | { | |
1496 | if (err == -1) { | |
1497 | free_fid(s, vs->newfidp->fid); | |
1498 | v9fs_string_free(&vs->path); | |
1499 | err = -ENOENT; | |
1500 | goto out; | |
1501 | } | |
1502 | ||
1503 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1504 | ||
1505 | vs->name_idx++; | |
1506 | if (vs->name_idx < vs->nwnames) { | |
1507 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1508 | vs->wnames[vs->name_idx].data); | |
1509 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1510 | ||
1511 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1512 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1513 | return; | |
1514 | } | |
1515 | ||
1516 | v9fs_string_free(&vs->path); | |
1517 | v9fs_walk_marshal(vs); | |
1518 | err = vs->offset; | |
1519 | out: | |
1520 | v9fs_walk_complete(s, vs, err); | |
1521 | } | |
1522 | ||
1523 | static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1524 | int err) | |
1525 | { | |
1526 | if (err == -1) { | |
1527 | v9fs_string_free(&vs->path); | |
1528 | err = -ENOENT; | |
1529 | goto out; | |
1530 | } | |
1531 | ||
1532 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1533 | vs->name_idx++; | |
1534 | if (vs->name_idx < vs->nwnames) { | |
1535 | ||
1536 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1537 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1538 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1539 | ||
1540 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1541 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1542 | return; | |
1543 | } | |
1544 | ||
1545 | v9fs_string_free(&vs->path); | |
1546 | v9fs_walk_marshal(vs); | |
1547 | err = vs->offset; | |
1548 | out: | |
1549 | v9fs_walk_complete(s, vs, err); | |
1550 | } | |
1551 | ||
9f107513 AL |
1552 | static void v9fs_walk(V9fsState *s, V9fsPDU *pdu) |
1553 | { | |
ff5e54c9 AL |
1554 | int32_t fid, newfid; |
1555 | V9fsWalkState *vs; | |
1556 | int err = 0; | |
1557 | int i; | |
1558 | ||
1559 | vs = qemu_malloc(sizeof(*vs)); | |
1560 | vs->pdu = pdu; | |
1561 | vs->wnames = NULL; | |
1562 | vs->qids = NULL; | |
1563 | vs->offset = 7; | |
1564 | ||
1565 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid, | |
1566 | &newfid, &vs->nwnames); | |
1567 | ||
1568 | if (vs->nwnames) { | |
1569 | vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); | |
1570 | ||
1571 | vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); | |
1572 | ||
1573 | for (i = 0; i < vs->nwnames; i++) { | |
1574 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s", | |
1575 | &vs->wnames[i]); | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | vs->fidp = lookup_fid(s, fid); | |
1580 | if (vs->fidp == NULL) { | |
1581 | err = -ENOENT; | |
1582 | goto out; | |
1583 | } | |
1584 | ||
1585 | /* FIXME: is this really valid? */ | |
1586 | if (fid == newfid) { | |
1587 | ||
d62dbb51 | 1588 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
ff5e54c9 AL |
1589 | v9fs_string_init(&vs->path); |
1590 | vs->name_idx = 0; | |
1591 | ||
1592 | if (vs->name_idx < vs->nwnames) { | |
1593 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1594 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1595 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1596 | ||
1597 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1598 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1599 | return; | |
1600 | } | |
1601 | } else { | |
1602 | vs->newfidp = alloc_fid(s, newfid); | |
1603 | if (vs->newfidp == NULL) { | |
1604 | err = -EINVAL; | |
1605 | goto out; | |
1606 | } | |
1607 | ||
1608 | vs->newfidp->uid = vs->fidp->uid; | |
1609 | v9fs_string_init(&vs->path); | |
1610 | vs->name_idx = 0; | |
1611 | v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); | |
1612 | ||
1613 | if (vs->name_idx < vs->nwnames) { | |
1614 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1615 | vs->wnames[vs->name_idx].data); | |
1616 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1617 | ||
1618 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1619 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1620 | return; | |
1621 | } | |
9f107513 | 1622 | } |
ff5e54c9 AL |
1623 | |
1624 | v9fs_walk_marshal(vs); | |
1625 | err = vs->offset; | |
1626 | out: | |
1627 | v9fs_walk_complete(s, vs, err); | |
9f107513 AL |
1628 | } |
1629 | ||
5e94c103 MK |
1630 | static int32_t get_iounit(V9fsState *s, V9fsString *name) |
1631 | { | |
1632 | struct statfs stbuf; | |
1633 | int32_t iounit = 0; | |
1634 | ||
1635 | /* | |
1636 | * iounit should be multiples of f_bsize (host filesystem block size | |
1637 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1638 | */ | |
1639 | if (!v9fs_do_statfs(s, name, &stbuf)) { | |
1640 | iounit = stbuf.f_bsize; | |
1641 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1642 | } | |
1643 | ||
1644 | if (!iounit) { | |
1645 | iounit = s->msize - P9_IOHDRSZ; | |
1646 | } | |
1647 | return iounit; | |
1648 | } | |
1649 | ||
a6568fe2 AL |
1650 | static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1651 | { | |
d62dbb51 | 1652 | if (vs->fidp->fs.dir == NULL) { |
a6568fe2 AL |
1653 | err = -errno; |
1654 | goto out; | |
1655 | } | |
d62dbb51 | 1656 | vs->fidp->fid_type = P9_FID_DIR; |
a6568fe2 AL |
1657 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1658 | err = vs->offset; | |
1659 | out: | |
1660 | complete_pdu(s, vs->pdu, err); | |
1661 | qemu_free(vs); | |
1662 | ||
1663 | } | |
1664 | ||
5e94c103 MK |
1665 | static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1666 | { | |
1667 | int err; | |
1668 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); | |
1669 | err = vs->offset; | |
1670 | complete_pdu(s, vs->pdu, err); | |
1671 | qemu_free(vs); | |
1672 | } | |
1673 | ||
a6568fe2 AL |
1674 | static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1675 | { | |
d62dbb51 | 1676 | if (vs->fidp->fs.fd == -1) { |
a6568fe2 AL |
1677 | err = -errno; |
1678 | goto out; | |
1679 | } | |
d62dbb51 | 1680 | vs->fidp->fid_type = P9_FID_FILE; |
5e94c103 MK |
1681 | vs->iounit = get_iounit(s, &vs->fidp->path); |
1682 | v9fs_open_post_getiounit(s, vs); | |
1683 | return; | |
a6568fe2 AL |
1684 | out: |
1685 | complete_pdu(s, vs->pdu, err); | |
1686 | qemu_free(vs); | |
1687 | } | |
1688 | ||
1689 | static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) | |
1690 | { | |
771e9d4c MK |
1691 | int flags; |
1692 | ||
a6568fe2 AL |
1693 | if (err) { |
1694 | err = -errno; | |
1695 | goto out; | |
1696 | } | |
1697 | ||
1698 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1699 | ||
1700 | if (S_ISDIR(vs->stbuf.st_mode)) { | |
d62dbb51 | 1701 | vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
a6568fe2 AL |
1702 | v9fs_open_post_opendir(s, vs, err); |
1703 | } else { | |
771e9d4c | 1704 | if (s->proto_version == V9FS_PROTO_2000L) { |
771e9d4c | 1705 | flags = vs->mode; |
630c2689 | 1706 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
771e9d4c MK |
1707 | } else { |
1708 | flags = omode_to_uflags(vs->mode); | |
1709 | } | |
d62dbb51 | 1710 | vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
a6568fe2 AL |
1711 | v9fs_open_post_open(s, vs, err); |
1712 | } | |
1713 | return; | |
1714 | out: | |
1715 | complete_pdu(s, vs->pdu, err); | |
1716 | qemu_free(vs); | |
9f107513 AL |
1717 | } |
1718 | ||
1719 | static void v9fs_open(V9fsState *s, V9fsPDU *pdu) | |
a6568fe2 AL |
1720 | { |
1721 | int32_t fid; | |
1722 | V9fsOpenState *vs; | |
1723 | ssize_t err = 0; | |
1724 | ||
a6568fe2 AL |
1725 | vs = qemu_malloc(sizeof(*vs)); |
1726 | vs->pdu = pdu; | |
1727 | vs->offset = 7; | |
771e9d4c | 1728 | vs->mode = 0; |
a6568fe2 | 1729 | |
771e9d4c MK |
1730 | if (s->proto_version == V9FS_PROTO_2000L) { |
1731 | pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode); | |
1732 | } else { | |
1733 | pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode); | |
1734 | } | |
a6568fe2 AL |
1735 | |
1736 | vs->fidp = lookup_fid(s, fid); | |
1737 | if (vs->fidp == NULL) { | |
1738 | err = -ENOENT; | |
1739 | goto out; | |
1740 | } | |
1741 | ||
d62dbb51 | 1742 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
a6568fe2 AL |
1743 | |
1744 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1745 | ||
1746 | v9fs_open_post_lstat(s, vs, err); | |
1747 | return; | |
1748 | out: | |
1749 | complete_pdu(s, pdu, err); | |
1750 | qemu_free(vs); | |
1751 | } | |
1752 | ||
c1568af5 VJ |
1753 | static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1754 | { | |
1755 | if (err == 0) { | |
1756 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
1757 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1758 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, | |
1759 | &vs->iounit); | |
1760 | err = vs->offset; | |
1761 | } else { | |
d62dbb51 AK |
1762 | vs->fidp->fid_type = P9_FID_NONE; |
1763 | close(vs->fidp->fs.fd); | |
c1568af5 VJ |
1764 | err = -errno; |
1765 | } | |
1766 | ||
1767 | complete_pdu(s, vs->pdu, err); | |
1768 | v9fs_string_free(&vs->name); | |
1769 | v9fs_string_free(&vs->fullname); | |
1770 | qemu_free(vs); | |
1771 | } | |
1772 | ||
1773 | static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, | |
1774 | int err) | |
1775 | { | |
1776 | if (err) { | |
1777 | err = -errno; | |
1778 | goto out; | |
1779 | } | |
1780 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1781 | ||
1782 | out: | |
1783 | v9fs_post_lcreate(s, vs, err); | |
1784 | } | |
1785 | ||
1786 | static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, | |
1787 | int err) | |
1788 | { | |
d62dbb51 | 1789 | if (vs->fidp->fs.fd == -1) { |
c1568af5 VJ |
1790 | err = -errno; |
1791 | goto out; | |
1792 | } | |
d62dbb51 | 1793 | vs->fidp->fid_type = P9_FID_FILE; |
c1568af5 VJ |
1794 | vs->iounit = get_iounit(s, &vs->fullname); |
1795 | v9fs_lcreate_post_get_iounit(s, vs, err); | |
1796 | return; | |
1797 | ||
1798 | out: | |
1799 | v9fs_post_lcreate(s, vs, err); | |
1800 | } | |
1801 | ||
1802 | static void v9fs_lcreate(V9fsState *s, V9fsPDU *pdu) | |
1803 | { | |
1804 | int32_t dfid, flags, mode; | |
1805 | gid_t gid; | |
1806 | V9fsLcreateState *vs; | |
1807 | ssize_t err = 0; | |
1808 | ||
1809 | vs = qemu_malloc(sizeof(*vs)); | |
1810 | vs->pdu = pdu; | |
1811 | vs->offset = 7; | |
1812 | ||
1813 | v9fs_string_init(&vs->fullname); | |
1814 | ||
1815 | pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags, | |
1816 | &mode, &gid); | |
1817 | ||
1818 | vs->fidp = lookup_fid(s, dfid); | |
1819 | if (vs->fidp == NULL) { | |
1820 | err = -ENOENT; | |
1821 | goto out; | |
1822 | } | |
1823 | ||
1824 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
1825 | vs->name.data); | |
1826 | ||
d62dbb51 | 1827 | vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
c1568af5 VJ |
1828 | gid, flags, mode); |
1829 | v9fs_lcreate_post_do_open2(s, vs, err); | |
1830 | return; | |
1831 | ||
1832 | out: | |
1833 | complete_pdu(s, vs->pdu, err); | |
1834 | v9fs_string_free(&vs->name); | |
1835 | qemu_free(vs); | |
1836 | } | |
1837 | ||
a6568fe2 AL |
1838 | static void v9fs_clunk(V9fsState *s, V9fsPDU *pdu) |
1839 | { | |
bbd5697b AL |
1840 | int32_t fid; |
1841 | size_t offset = 7; | |
1842 | int err; | |
1843 | ||
1844 | pdu_unmarshal(pdu, offset, "d", &fid); | |
1845 | ||
1846 | err = free_fid(s, fid); | |
1847 | if (err < 0) { | |
1848 | goto out; | |
a6568fe2 | 1849 | } |
bbd5697b AL |
1850 | |
1851 | offset = 7; | |
1852 | err = offset; | |
1853 | out: | |
1854 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1855 | } |
1856 | ||
a9231555 AL |
1857 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1858 | ||
1859 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1860 | { | |
1861 | if (err) { | |
1862 | goto out; | |
1863 | } | |
1864 | v9fs_stat_free(&vs->v9stat); | |
1865 | v9fs_string_free(&vs->name); | |
1866 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1867 | vs->offset += vs->count; | |
1868 | err = vs->offset; | |
1869 | out: | |
1870 | complete_pdu(s, vs->pdu, err); | |
1871 | qemu_free(vs); | |
1872 | return; | |
1873 | } | |
1874 | ||
1875 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1876 | ssize_t err) | |
1877 | { | |
1878 | if (err) { | |
1879 | err = -errno; | |
1880 | goto out; | |
1881 | } | |
1882 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1883 | if (err) { | |
1884 | goto out; | |
1885 | } | |
1886 | ||
1887 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1888 | &vs->v9stat); | |
1889 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1890 | ((vs->count + vs->len) > vs->max_count)) { | |
d62dbb51 | 1891 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1892 | v9fs_read_post_seekdir(s, vs, err); |
1893 | return; | |
1894 | } | |
1895 | vs->count += vs->len; | |
1896 | v9fs_stat_free(&vs->v9stat); | |
1897 | v9fs_string_free(&vs->name); | |
1898 | vs->dir_pos = vs->dent->d_off; | |
d62dbb51 | 1899 | vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
a9231555 AL |
1900 | v9fs_read_post_readdir(s, vs, err); |
1901 | return; | |
1902 | out: | |
d62dbb51 | 1903 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1904 | v9fs_read_post_seekdir(s, vs, err); |
1905 | return; | |
1906 | ||
1907 | } | |
1908 | ||
1909 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1910 | { | |
1911 | if (vs->dent) { | |
1912 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1913 | v9fs_string_init(&vs->name); | |
1914 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1915 | vs->dent->d_name); | |
1916 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1917 | v9fs_read_post_dir_lstat(s, vs, err); | |
1918 | return; | |
1919 | } | |
1920 | ||
1921 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1922 | vs->offset += vs->count; | |
1923 | err = vs->offset; | |
1924 | complete_pdu(s, vs->pdu, err); | |
1925 | qemu_free(vs); | |
1926 | return; | |
1927 | } | |
1928 | ||
1929 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1930 | { | |
d62dbb51 | 1931 | vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
a9231555 AL |
1932 | v9fs_read_post_readdir(s, vs, err); |
1933 | return; | |
1934 | } | |
1935 | ||
1936 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1937 | ssize_t err) | |
1938 | { | |
d62dbb51 | 1939 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
a9231555 AL |
1940 | v9fs_read_post_telldir(s, vs, err); |
1941 | return; | |
1942 | } | |
1943 | ||
1944 | static void v9fs_read_post_readv(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1945 | { | |
1946 | if (err < 0) { | |
1947 | /* IO error return the error */ | |
1948 | err = -errno; | |
1949 | goto out; | |
1950 | } | |
1951 | vs->total += vs->len; | |
1952 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1953 | if (vs->total < vs->count && vs->len > 0) { | |
1954 | do { | |
1955 | if (0) { | |
1956 | print_sg(vs->sg, vs->cnt); | |
1957 | } | |
d62dbb51 | 1958 | vs->len = v9fs_do_readv(s, vs->fidp->fs.fd, vs->sg, vs->cnt); |
a9231555 AL |
1959 | } while (vs->len == -1 && errno == EINTR); |
1960 | if (vs->len == -1) { | |
1961 | err = -errno; | |
1962 | } | |
1963 | v9fs_read_post_readv(s, vs, err); | |
1964 | return; | |
1965 | } | |
1966 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1967 | vs->offset += vs->count; | |
1968 | err = vs->offset; | |
1969 | ||
1970 | out: | |
1971 | complete_pdu(s, vs->pdu, err); | |
1972 | qemu_free(vs); | |
1973 | } | |
1974 | ||
1975 | static void v9fs_read_post_lseek(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1976 | { | |
1977 | if (err == -1) { | |
1978 | err = -errno; | |
1979 | goto out; | |
1980 | } | |
1981 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
1982 | ||
1983 | if (vs->total < vs->count) { | |
1984 | do { | |
1985 | if (0) { | |
1986 | print_sg(vs->sg, vs->cnt); | |
1987 | } | |
d62dbb51 | 1988 | vs->len = v9fs_do_readv(s, vs->fidp->fs.fd, vs->sg, vs->cnt); |
a9231555 AL |
1989 | } while (vs->len == -1 && errno == EINTR); |
1990 | if (vs->len == -1) { | |
1991 | err = -errno; | |
1992 | } | |
1993 | v9fs_read_post_readv(s, vs, err); | |
1994 | return; | |
1995 | } | |
1996 | out: | |
1997 | complete_pdu(s, vs->pdu, err); | |
1998 | qemu_free(vs); | |
1999 | } | |
2000 | ||
fa32ef88 AK |
2001 | static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
2002 | { | |
2003 | ssize_t err = 0; | |
2004 | int read_count; | |
2005 | int64_t xattr_len; | |
2006 | ||
2007 | xattr_len = vs->fidp->fs.xattr.len; | |
2008 | read_count = xattr_len - vs->off; | |
2009 | if (read_count > vs->count) { | |
2010 | read_count = vs->count; | |
2011 | } else if (read_count < 0) { | |
2012 | /* | |
2013 | * read beyond XATTR value | |
2014 | */ | |
2015 | read_count = 0; | |
2016 | } | |
2017 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count); | |
2018 | vs->offset += pdu_pack(vs->pdu, vs->offset, | |
2019 | ((char *)vs->fidp->fs.xattr.value) + vs->off, | |
2020 | read_count); | |
2021 | err = vs->offset; | |
2022 | complete_pdu(s, vs->pdu, err); | |
2023 | qemu_free(vs); | |
2024 | } | |
2025 | ||
9f107513 AL |
2026 | static void v9fs_read(V9fsState *s, V9fsPDU *pdu) |
2027 | { | |
a9231555 AL |
2028 | int32_t fid; |
2029 | V9fsReadState *vs; | |
2030 | ssize_t err = 0; | |
2031 | ||
2032 | vs = qemu_malloc(sizeof(*vs)); | |
2033 | vs->pdu = pdu; | |
2034 | vs->offset = 7; | |
2035 | vs->total = 0; | |
2036 | vs->len = 0; | |
2037 | vs->count = 0; | |
2038 | ||
2039 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
2040 | ||
2041 | vs->fidp = lookup_fid(s, fid); | |
2042 | if (vs->fidp == NULL) { | |
2043 | err = -EINVAL; | |
2044 | goto out; | |
2045 | } | |
2046 | ||
fa32ef88 | 2047 | if (vs->fidp->fid_type == P9_FID_DIR) { |
a9231555 AL |
2048 | vs->max_count = vs->count; |
2049 | vs->count = 0; | |
2050 | if (vs->off == 0) { | |
d62dbb51 | 2051 | v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
a9231555 AL |
2052 | } |
2053 | v9fs_read_post_rewinddir(s, vs, err); | |
2054 | return; | |
fa32ef88 | 2055 | } else if (vs->fidp->fid_type == P9_FID_FILE) { |
a9231555 AL |
2056 | vs->sg = vs->iov; |
2057 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
d62dbb51 | 2058 | err = v9fs_do_lseek(s, vs->fidp->fs.fd, vs->off, SEEK_SET); |
a9231555 AL |
2059 | v9fs_read_post_lseek(s, vs, err); |
2060 | return; | |
fa32ef88 AK |
2061 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2062 | v9fs_xattr_read(s, vs); | |
2063 | return; | |
a9231555 AL |
2064 | } else { |
2065 | err = -EINVAL; | |
9f107513 | 2066 | } |
a9231555 AL |
2067 | out: |
2068 | complete_pdu(s, pdu, err); | |
2069 | qemu_free(vs); | |
9f107513 AL |
2070 | } |
2071 | ||
c18e2f94 SK |
2072 | typedef struct V9fsReadDirState { |
2073 | V9fsPDU *pdu; | |
2074 | V9fsFidState *fidp; | |
2075 | V9fsQID qid; | |
2076 | off_t saved_dir_pos; | |
2077 | struct dirent *dent; | |
2078 | int32_t count; | |
2079 | int32_t max_count; | |
2080 | size_t offset; | |
2081 | int64_t initial_offset; | |
2082 | V9fsString name; | |
2083 | } V9fsReadDirState; | |
2084 | ||
2085 | static void v9fs_readdir_post_seekdir(V9fsState *s, V9fsReadDirState *vs) | |
2086 | { | |
2087 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
2088 | vs->offset += vs->count; | |
2089 | complete_pdu(s, vs->pdu, vs->offset); | |
2090 | qemu_free(vs); | |
2091 | return; | |
2092 | } | |
2093 | ||
2094 | /* Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
2095 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
2096 | */ | |
2097 | #define V9_READDIR_DATA_SZ (24 + strlen(vs->name.data)) | |
2098 | ||
2099 | static void v9fs_readdir_post_readdir(V9fsState *s, V9fsReadDirState *vs) | |
2100 | { | |
2101 | int len; | |
2102 | size_t size; | |
2103 | ||
2104 | if (vs->dent) { | |
2105 | v9fs_string_init(&vs->name); | |
2106 | v9fs_string_sprintf(&vs->name, "%s", vs->dent->d_name); | |
2107 | ||
2108 | if ((vs->count + V9_READDIR_DATA_SZ) > vs->max_count) { | |
2109 | /* Ran out of buffer. Set dir back to old position and return */ | |
d62dbb51 | 2110 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->saved_dir_pos); |
c18e2f94 SK |
2111 | v9fs_readdir_post_seekdir(s, vs); |
2112 | return; | |
2113 | } | |
2114 | ||
2115 | /* Fill up just the path field of qid because the client uses | |
2116 | * only that. To fill the entire qid structure we will have | |
2117 | * to stat each dirent found, which is expensive | |
2118 | */ | |
2119 | size = MIN(sizeof(vs->dent->d_ino), sizeof(vs->qid.path)); | |
2120 | memcpy(&vs->qid.path, &vs->dent->d_ino, size); | |
2121 | /* Fill the other fields with dummy values */ | |
2122 | vs->qid.type = 0; | |
2123 | vs->qid.version = 0; | |
2124 | ||
2125 | len = pdu_marshal(vs->pdu, vs->offset+4+vs->count, "Qqbs", | |
2126 | &vs->qid, vs->dent->d_off, | |
2127 | vs->dent->d_type, &vs->name); | |
2128 | vs->count += len; | |
2129 | v9fs_string_free(&vs->name); | |
2130 | vs->saved_dir_pos = vs->dent->d_off; | |
d62dbb51 | 2131 | vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
c18e2f94 SK |
2132 | v9fs_readdir_post_readdir(s, vs); |
2133 | return; | |
2134 | } | |
2135 | ||
2136 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
2137 | vs->offset += vs->count; | |
2138 | complete_pdu(s, vs->pdu, vs->offset); | |
2139 | qemu_free(vs); | |
2140 | return; | |
2141 | } | |
2142 | ||
2143 | static void v9fs_readdir_post_telldir(V9fsState *s, V9fsReadDirState *vs) | |
2144 | { | |
d62dbb51 | 2145 | vs->dent = v9fs_do_readdir(s, vs->fidp->fs.dir); |
c18e2f94 SK |
2146 | v9fs_readdir_post_readdir(s, vs); |
2147 | return; | |
2148 | } | |
2149 | ||
2150 | static void v9fs_readdir_post_setdir(V9fsState *s, V9fsReadDirState *vs) | |
2151 | { | |
d62dbb51 | 2152 | vs->saved_dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
c18e2f94 SK |
2153 | v9fs_readdir_post_telldir(s, vs); |
2154 | return; | |
2155 | } | |
2156 | ||
2157 | static void v9fs_readdir(V9fsState *s, V9fsPDU *pdu) | |
2158 | { | |
2159 | int32_t fid; | |
2160 | V9fsReadDirState *vs; | |
2161 | ssize_t err = 0; | |
2162 | size_t offset = 7; | |
2163 | ||
2164 | vs = qemu_malloc(sizeof(*vs)); | |
2165 | vs->pdu = pdu; | |
2166 | vs->offset = 7; | |
2167 | vs->count = 0; | |
2168 | ||
2169 | pdu_unmarshal(vs->pdu, offset, "dqd", &fid, &vs->initial_offset, | |
2170 | &vs->max_count); | |
2171 | ||
2172 | vs->fidp = lookup_fid(s, fid); | |
d62dbb51 | 2173 | if (vs->fidp == NULL || !(vs->fidp->fs.dir)) { |
c18e2f94 SK |
2174 | err = -EINVAL; |
2175 | goto out; | |
2176 | } | |
2177 | ||
2178 | if (vs->initial_offset == 0) { | |
d62dbb51 | 2179 | v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
c18e2f94 | 2180 | } else { |
d62dbb51 | 2181 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->initial_offset); |
c18e2f94 SK |
2182 | } |
2183 | ||
2184 | v9fs_readdir_post_setdir(s, vs); | |
2185 | return; | |
2186 | ||
2187 | out: | |
2188 | complete_pdu(s, pdu, err); | |
2189 | qemu_free(vs); | |
2190 | return; | |
2191 | } | |
2192 | ||
8449360c AL |
2193 | static void v9fs_write_post_writev(V9fsState *s, V9fsWriteState *vs, |
2194 | ssize_t err) | |
2195 | { | |
2196 | if (err < 0) { | |
2197 | /* IO error return the error */ | |
2198 | err = -errno; | |
2199 | goto out; | |
2200 | } | |
2201 | vs->total += vs->len; | |
2202 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
2203 | if (vs->total < vs->count && vs->len > 0) { | |
2204 | do { | |
2205 | if (0) { | |
2206 | print_sg(vs->sg, vs->cnt); | |
2207 | } | |
d62dbb51 | 2208 | vs->len = v9fs_do_writev(s, vs->fidp->fs.fd, vs->sg, vs->cnt); |
8449360c AL |
2209 | } while (vs->len == -1 && errno == EINTR); |
2210 | if (vs->len == -1) { | |
2211 | err = -errno; | |
2212 | } | |
2213 | v9fs_write_post_writev(s, vs, err); | |
2214 | return; | |
2215 | } | |
2216 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
2217 | ||
2218 | err = vs->offset; | |
2219 | out: | |
2220 | complete_pdu(s, vs->pdu, err); | |
2221 | qemu_free(vs); | |
2222 | } | |
2223 | ||
2224 | static void v9fs_write_post_lseek(V9fsState *s, V9fsWriteState *vs, ssize_t err) | |
2225 | { | |
2226 | if (err == -1) { | |
2227 | err = -errno; | |
2228 | goto out; | |
2229 | } | |
2230 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); | |
2231 | ||
2232 | if (vs->total < vs->count) { | |
2233 | do { | |
2234 | if (0) { | |
2235 | print_sg(vs->sg, vs->cnt); | |
2236 | } | |
d62dbb51 | 2237 | vs->len = v9fs_do_writev(s, vs->fidp->fs.fd, vs->sg, vs->cnt); |
8449360c AL |
2238 | } while (vs->len == -1 && errno == EINTR); |
2239 | if (vs->len == -1) { | |
2240 | err = -errno; | |
2241 | } | |
2242 | v9fs_write_post_writev(s, vs, err); | |
2243 | return; | |
2244 | } | |
2245 | ||
2246 | out: | |
2247 | complete_pdu(s, vs->pdu, err); | |
2248 | qemu_free(vs); | |
2249 | } | |
2250 | ||
10b468bd AK |
2251 | static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
2252 | { | |
2253 | int i, to_copy; | |
2254 | ssize_t err = 0; | |
2255 | int write_count; | |
2256 | int64_t xattr_len; | |
2257 | ||
2258 | xattr_len = vs->fidp->fs.xattr.len; | |
2259 | write_count = xattr_len - vs->off; | |
2260 | if (write_count > vs->count) { | |
2261 | write_count = vs->count; | |
2262 | } else if (write_count < 0) { | |
2263 | /* | |
2264 | * write beyond XATTR value len specified in | |
2265 | * xattrcreate | |
2266 | */ | |
2267 | err = -ENOSPC; | |
2268 | goto out; | |
2269 | } | |
2270 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count); | |
2271 | err = vs->offset; | |
2272 | vs->fidp->fs.xattr.copied_len += write_count; | |
2273 | /* | |
2274 | * Now copy the content from sg list | |
2275 | */ | |
2276 | for (i = 0; i < vs->cnt; i++) { | |
2277 | if (write_count > vs->sg[i].iov_len) { | |
2278 | to_copy = vs->sg[i].iov_len; | |
2279 | } else { | |
2280 | to_copy = write_count; | |
2281 | } | |
2282 | memcpy((char *)vs->fidp->fs.xattr.value + vs->off, | |
2283 | vs->sg[i].iov_base, to_copy); | |
2284 | /* updating vs->off since we are not using below */ | |
2285 | vs->off += to_copy; | |
2286 | write_count -= to_copy; | |
2287 | } | |
2288 | out: | |
2289 | complete_pdu(s, vs->pdu, err); | |
2290 | qemu_free(vs); | |
2291 | } | |
2292 | ||
9f107513 AL |
2293 | static void v9fs_write(V9fsState *s, V9fsPDU *pdu) |
2294 | { | |
8449360c AL |
2295 | int32_t fid; |
2296 | V9fsWriteState *vs; | |
2297 | ssize_t err; | |
2298 | ||
2299 | vs = qemu_malloc(sizeof(*vs)); | |
2300 | ||
2301 | vs->pdu = pdu; | |
2302 | vs->offset = 7; | |
2303 | vs->sg = vs->iov; | |
2304 | vs->total = 0; | |
2305 | vs->len = 0; | |
2306 | ||
2307 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
10b468bd | 2308 | vs->sg, &vs->cnt); |
8449360c AL |
2309 | |
2310 | vs->fidp = lookup_fid(s, fid); | |
2311 | if (vs->fidp == NULL) { | |
2312 | err = -EINVAL; | |
2313 | goto out; | |
9f107513 | 2314 | } |
8449360c | 2315 | |
10b468bd AK |
2316 | if (vs->fidp->fid_type == P9_FID_FILE) { |
2317 | if (vs->fidp->fs.fd == -1) { | |
2318 | err = -EINVAL; | |
2319 | goto out; | |
2320 | } | |
2321 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { | |
2322 | /* | |
2323 | * setxattr operation | |
2324 | */ | |
2325 | v9fs_xattr_write(s, vs); | |
2326 | return; | |
2327 | } else { | |
8449360c AL |
2328 | err = -EINVAL; |
2329 | goto out; | |
2330 | } | |
d62dbb51 | 2331 | err = v9fs_do_lseek(s, vs->fidp->fs.fd, vs->off, SEEK_SET); |
8449360c AL |
2332 | |
2333 | v9fs_write_post_lseek(s, vs, err); | |
2334 | return; | |
2335 | ||
2336 | out: | |
2337 | complete_pdu(s, vs->pdu, err); | |
2338 | qemu_free(vs); | |
9f107513 AL |
2339 | } |
2340 | ||
5e94c103 | 2341 | static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
c494dd6f | 2342 | { |
5e94c103 MK |
2343 | int err; |
2344 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
2345 | stat_to_qid(&vs->stbuf, &vs->qid); | |
c494dd6f | 2346 | |
5e94c103 MK |
2347 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); |
2348 | err = vs->offset; | |
c494dd6f | 2349 | |
5e94c103 MK |
2350 | complete_pdu(s, vs->pdu, err); |
2351 | v9fs_string_free(&vs->name); | |
2352 | v9fs_string_free(&vs->extension); | |
2353 | v9fs_string_free(&vs->fullname); | |
2354 | qemu_free(vs); | |
2355 | } | |
2356 | ||
2357 | static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) | |
2358 | { | |
2359 | if (err == 0) { | |
2360 | vs->iounit = get_iounit(s, &vs->fidp->path); | |
2361 | v9fs_create_post_getiounit(s, vs); | |
2362 | return; | |
c494dd6f AL |
2363 | } |
2364 | ||
2365 | complete_pdu(s, vs->pdu, err); | |
2366 | v9fs_string_free(&vs->name); | |
2367 | v9fs_string_free(&vs->extension); | |
2368 | v9fs_string_free(&vs->fullname); | |
2369 | qemu_free(vs); | |
2370 | } | |
2371 | ||
2372 | static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) | |
2373 | { | |
2374 | if (err) { | |
2375 | err = -errno; | |
2376 | } | |
2377 | v9fs_post_create(s, vs, err); | |
2378 | } | |
2379 | ||
2380 | static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, | |
2381 | int err) | |
2382 | { | |
d62dbb51 | 2383 | if (!vs->fidp->fs.dir) { |
c494dd6f AL |
2384 | err = -errno; |
2385 | } | |
d62dbb51 | 2386 | vs->fidp->fid_type = P9_FID_DIR; |
c494dd6f AL |
2387 | v9fs_post_create(s, vs, err); |
2388 | } | |
2389 | ||
2390 | static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, | |
2391 | int err) | |
2392 | { | |
2393 | if (err) { | |
2394 | err = -errno; | |
2395 | goto out; | |
2396 | } | |
2397 | ||
d62dbb51 | 2398 | vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
c494dd6f AL |
2399 | v9fs_create_post_opendir(s, vs, err); |
2400 | return; | |
2401 | ||
2402 | out: | |
2403 | v9fs_post_create(s, vs, err); | |
2404 | } | |
2405 | ||
2406 | static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) | |
2407 | { | |
2408 | if (err) { | |
2409 | err = -errno; | |
2410 | goto out; | |
2411 | } | |
2412 | ||
2413 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2414 | v9fs_create_post_dir_lstat(s, vs, err); | |
2415 | return; | |
2416 | ||
2417 | out: | |
2418 | v9fs_post_create(s, vs, err); | |
2419 | } | |
2420 | ||
c494dd6f AL |
2421 | static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2422 | { | |
2423 | if (err) { | |
d62dbb51 AK |
2424 | vs->fidp->fid_type = P9_FID_NONE; |
2425 | close(vs->fidp->fs.fd); | |
c494dd6f AL |
2426 | err = -errno; |
2427 | } | |
c494dd6f AL |
2428 | v9fs_post_create(s, vs, err); |
2429 | return; | |
2430 | } | |
2431 | ||
2432 | static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) | |
2433 | { | |
d62dbb51 | 2434 | if (vs->fidp->fs.fd == -1) { |
c494dd6f AL |
2435 | err = -errno; |
2436 | goto out; | |
2437 | } | |
d62dbb51 AK |
2438 | vs->fidp->fid_type = P9_FID_FILE; |
2439 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
c494dd6f AL |
2440 | v9fs_create_post_fstat(s, vs, err); |
2441 | ||
2442 | return; | |
2443 | ||
2444 | out: | |
2445 | v9fs_post_create(s, vs, err); | |
2446 | ||
2447 | } | |
2448 | ||
2449 | static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) | |
2450 | { | |
2451 | ||
2452 | if (err == 0 || errno != ENOENT) { | |
2453 | err = -errno; | |
2454 | goto out; | |
2455 | } | |
2456 | ||
2457 | if (vs->perm & P9_STAT_MODE_DIR) { | |
b67592ea MK |
2458 | err = v9fs_do_mkdir(s, vs->fullname.data, vs->perm & 0777, |
2459 | vs->fidp->uid, -1); | |
c494dd6f AL |
2460 | v9fs_create_post_mkdir(s, vs, err); |
2461 | } else if (vs->perm & P9_STAT_MODE_SYMLINK) { | |
08c60fc9 VJ |
2462 | err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2463 | vs->fullname.data, -1); | |
c494dd6f AL |
2464 | v9fs_create_post_perms(s, vs, err); |
2465 | } else if (vs->perm & P9_STAT_MODE_LINK) { | |
2466 | int32_t nfid = atoi(vs->extension.data); | |
2467 | V9fsFidState *nfidp = lookup_fid(s, nfid); | |
2468 | if (nfidp == NULL) { | |
2469 | err = -errno; | |
2470 | v9fs_post_create(s, vs, err); | |
2471 | } | |
2472 | err = v9fs_do_link(s, &nfidp->path, &vs->fullname); | |
2473 | v9fs_create_post_perms(s, vs, err); | |
2474 | } else if (vs->perm & P9_STAT_MODE_DEVICE) { | |
2475 | char ctype; | |
2476 | uint32_t major, minor; | |
2477 | mode_t nmode = 0; | |
2478 | ||
2479 | if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, | |
2480 | &minor) != 3) { | |
2481 | err = -errno; | |
2482 | v9fs_post_create(s, vs, err); | |
2483 | } | |
2484 | ||
2485 | switch (ctype) { | |
2486 | case 'c': | |
2487 | nmode = S_IFCHR; | |
2488 | break; | |
2489 | case 'b': | |
2490 | nmode = S_IFBLK; | |
2491 | break; | |
2492 | default: | |
2493 | err = -EIO; | |
2494 | v9fs_post_create(s, vs, err); | |
2495 | } | |
2496 | ||
2497 | nmode |= vs->perm & 0777; | |
5268cecc MK |
2498 | err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2499 | makedev(major, minor), vs->fidp->uid, -1); | |
c494dd6f AL |
2500 | v9fs_create_post_perms(s, vs, err); |
2501 | } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { | |
5268cecc MK |
2502 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777), |
2503 | 0, vs->fidp->uid, -1); | |
c494dd6f AL |
2504 | v9fs_post_create(s, vs, err); |
2505 | } else if (vs->perm & P9_STAT_MODE_SOCKET) { | |
5268cecc MK |
2506 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777), |
2507 | 0, vs->fidp->uid, -1); | |
63729c36 | 2508 | v9fs_post_create(s, vs, err); |
c494dd6f | 2509 | } else { |
d62dbb51 | 2510 | vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
c1568af5 VJ |
2511 | -1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm); |
2512 | ||
c494dd6f AL |
2513 | v9fs_create_post_open2(s, vs, err); |
2514 | } | |
2515 | ||
2516 | return; | |
2517 | ||
2518 | out: | |
2519 | v9fs_post_create(s, vs, err); | |
2520 | } | |
2521 | ||
9f107513 AL |
2522 | static void v9fs_create(V9fsState *s, V9fsPDU *pdu) |
2523 | { | |
c494dd6f AL |
2524 | int32_t fid; |
2525 | V9fsCreateState *vs; | |
2526 | int err = 0; | |
2527 | ||
2528 | vs = qemu_malloc(sizeof(*vs)); | |
2529 | vs->pdu = pdu; | |
2530 | vs->offset = 7; | |
2531 | ||
2532 | v9fs_string_init(&vs->fullname); | |
2533 | ||
2534 | pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name, | |
2535 | &vs->perm, &vs->mode, &vs->extension); | |
2536 | ||
2537 | vs->fidp = lookup_fid(s, fid); | |
2538 | if (vs->fidp == NULL) { | |
2539 | err = -EINVAL; | |
2540 | goto out; | |
9f107513 | 2541 | } |
c494dd6f AL |
2542 | |
2543 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
2544 | vs->name.data); | |
2545 | ||
2546 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2547 | v9fs_create_post_lstat(s, vs, err); | |
2548 | return; | |
2549 | ||
2550 | out: | |
2551 | complete_pdu(s, vs->pdu, err); | |
2552 | v9fs_string_free(&vs->name); | |
2553 | v9fs_string_free(&vs->extension); | |
2554 | qemu_free(vs); | |
9f107513 AL |
2555 | } |
2556 | ||
08c60fc9 VJ |
2557 | static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2558 | { | |
2559 | if (err == 0) { | |
2560 | stat_to_qid(&vs->stbuf, &vs->qid); | |
2561 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
2562 | err = vs->offset; | |
2563 | } else { | |
2564 | err = -errno; | |
2565 | } | |
2566 | complete_pdu(s, vs->pdu, err); | |
2567 | v9fs_string_free(&vs->name); | |
2568 | v9fs_string_free(&vs->symname); | |
2569 | v9fs_string_free(&vs->fullname); | |
2570 | qemu_free(vs); | |
2571 | } | |
2572 | ||
2573 | static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, | |
2574 | int err) | |
2575 | { | |
2576 | if (err) { | |
2577 | goto out; | |
2578 | } | |
2579 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2580 | out: | |
2581 | v9fs_post_symlink(s, vs, err); | |
2582 | } | |
2583 | ||
2584 | static void v9fs_symlink(V9fsState *s, V9fsPDU *pdu) | |
2585 | { | |
2586 | int32_t dfid; | |
2587 | V9fsSymlinkState *vs; | |
2588 | int err = 0; | |
2589 | gid_t gid; | |
2590 | ||
2591 | vs = qemu_malloc(sizeof(*vs)); | |
2592 | vs->pdu = pdu; | |
2593 | vs->offset = 7; | |
2594 | ||
2595 | v9fs_string_init(&vs->fullname); | |
2596 | ||
2597 | pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name, | |
2598 | &vs->symname, &gid); | |
2599 | ||
2600 | vs->dfidp = lookup_fid(s, dfid); | |
2601 | if (vs->dfidp == NULL) { | |
2602 | err = -EINVAL; | |
2603 | goto out; | |
2604 | } | |
2605 | ||
2606 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data, | |
2607 | vs->name.data); | |
2608 | err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, | |
2609 | vs->fullname.data, gid); | |
2610 | v9fs_symlink_post_do_symlink(s, vs, err); | |
2611 | return; | |
2612 | ||
2613 | out: | |
2614 | complete_pdu(s, vs->pdu, err); | |
2615 | v9fs_string_free(&vs->name); | |
2616 | v9fs_string_free(&vs->symname); | |
2617 | qemu_free(vs); | |
2618 | } | |
2619 | ||
9f107513 AL |
2620 | static void v9fs_flush(V9fsState *s, V9fsPDU *pdu) |
2621 | { | |
9c5e9d89 AL |
2622 | /* A nop call with no return */ |
2623 | complete_pdu(s, pdu, 7); | |
9f107513 AL |
2624 | } |
2625 | ||
b2c224be VJ |
2626 | static void v9fs_link(V9fsState *s, V9fsPDU *pdu) |
2627 | { | |
2628 | int32_t dfid, oldfid; | |
2629 | V9fsFidState *dfidp, *oldfidp; | |
2630 | V9fsString name, fullname; | |
2631 | size_t offset = 7; | |
2632 | int err = 0; | |
2633 | ||
2634 | v9fs_string_init(&fullname); | |
2635 | ||
2636 | pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2637 | ||
2638 | dfidp = lookup_fid(s, dfid); | |
2639 | if (dfidp == NULL) { | |
2640 | err = -errno; | |
2641 | goto out; | |
2642 | } | |
2643 | ||
2644 | oldfidp = lookup_fid(s, oldfid); | |
2645 | if (oldfidp == NULL) { | |
2646 | err = -errno; | |
2647 | goto out; | |
2648 | } | |
2649 | ||
2650 | v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data); | |
2651 | err = offset; | |
2652 | err = v9fs_do_link(s, &oldfidp->path, &fullname); | |
2653 | if (err) { | |
2654 | err = -errno; | |
2655 | } | |
2656 | v9fs_string_free(&fullname); | |
2657 | ||
2658 | out: | |
2659 | v9fs_string_free(&name); | |
2660 | complete_pdu(s, pdu, err); | |
2661 | } | |
2662 | ||
5bae1900 AL |
2663 | static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
2664 | int err) | |
2665 | { | |
5bae1900 | 2666 | if (err < 0) { |
926487b7 SK |
2667 | err = -errno; |
2668 | } else { | |
2669 | err = vs->offset; | |
5bae1900 AL |
2670 | } |
2671 | ||
926487b7 SK |
2672 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
2673 | free_fid(s, vs->fidp->fid); | |
2674 | ||
5bae1900 AL |
2675 | complete_pdu(s, vs->pdu, err); |
2676 | qemu_free(vs); | |
2677 | } | |
2678 | ||
9f107513 AL |
2679 | static void v9fs_remove(V9fsState *s, V9fsPDU *pdu) |
2680 | { | |
5bae1900 AL |
2681 | int32_t fid; |
2682 | V9fsRemoveState *vs; | |
2683 | int err = 0; | |
2684 | ||
2685 | vs = qemu_malloc(sizeof(*vs)); | |
2686 | vs->pdu = pdu; | |
2687 | vs->offset = 7; | |
2688 | ||
2689 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
2690 | ||
2691 | vs->fidp = lookup_fid(s, fid); | |
2692 | if (vs->fidp == NULL) { | |
2693 | err = -EINVAL; | |
2694 | goto out; | |
9f107513 | 2695 | } |
5bae1900 AL |
2696 | |
2697 | err = v9fs_do_remove(s, &vs->fidp->path); | |
2698 | v9fs_remove_post_remove(s, vs, err); | |
2699 | return; | |
2700 | ||
2701 | out: | |
2702 | complete_pdu(s, pdu, err); | |
2703 | qemu_free(vs); | |
9f107513 AL |
2704 | } |
2705 | ||
8cf89e00 AL |
2706 | static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2707 | { | |
2708 | if (err < 0) { | |
2709 | goto out; | |
2710 | } | |
2711 | ||
2712 | err = vs->offset; | |
2713 | ||
2714 | out: | |
2715 | v9fs_stat_free(&vs->v9stat); | |
2716 | complete_pdu(s, vs->pdu, err); | |
2717 | qemu_free(vs); | |
2718 | } | |
2719 | ||
2720 | static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) | |
2721 | { | |
2722 | if (err < 0) { | |
2723 | goto out; | |
2724 | } | |
8cf89e00 AL |
2725 | if (vs->v9stat.length != -1) { |
2726 | if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { | |
2727 | err = -errno; | |
2728 | } | |
2729 | } | |
2730 | v9fs_wstat_post_truncate(s, vs, err); | |
2731 | return; | |
2732 | ||
2733 | out: | |
2734 | v9fs_stat_free(&vs->v9stat); | |
2735 | complete_pdu(s, vs->pdu, err); | |
2736 | qemu_free(vs); | |
2737 | } | |
2738 | ||
c7b4b0b3 | 2739 | static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs) |
8cf89e00 | 2740 | { |
c7b4b0b3 MK |
2741 | int err = 0; |
2742 | char *old_name, *new_name; | |
2743 | char *end; | |
8cf89e00 | 2744 | |
c7b4b0b3 MK |
2745 | if (vs->newdirfid != -1) { |
2746 | V9fsFidState *dirfidp; | |
2747 | dirfidp = lookup_fid(s, vs->newdirfid); | |
2748 | ||
2749 | if (dirfidp == NULL) { | |
2750 | err = -ENOENT; | |
2751 | goto out; | |
2752 | } | |
2753 | ||
d62dbb51 | 2754 | BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
8cf89e00 | 2755 | |
c7b4b0b3 MK |
2756 | new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2); |
2757 | ||
2758 | strcpy(new_name, dirfidp->path.data); | |
2759 | strcat(new_name, "/"); | |
2760 | strcat(new_name + dirfidp->path.size, vs->name.data); | |
2761 | } else { | |
8cf89e00 AL |
2762 | old_name = vs->fidp->path.data; |
2763 | end = strrchr(old_name, '/'); | |
2764 | if (end) { | |
2765 | end++; | |
2766 | } else { | |
2767 | end = old_name; | |
2768 | } | |
c7b4b0b3 | 2769 | new_name = qemu_mallocz(end - old_name + vs->name.size + 1); |
8cf89e00 | 2770 | |
c7b4b0b3 MK |
2771 | strncat(new_name, old_name, end - old_name); |
2772 | strncat(new_name + (end - old_name), vs->name.data, vs->name.size); | |
2773 | } | |
8cf89e00 | 2774 | |
c7b4b0b3 MK |
2775 | v9fs_string_free(&vs->name); |
2776 | vs->name.data = qemu_strdup(new_name); | |
2777 | vs->name.size = strlen(new_name); | |
8cf89e00 | 2778 | |
c7b4b0b3 MK |
2779 | if (strcmp(new_name, vs->fidp->path.data) != 0) { |
2780 | if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) { | |
2781 | err = -errno; | |
2782 | } else { | |
2783 | V9fsFidState *fidp; | |
2784 | /* | |
2785 | * Fixup fid's pointing to the old name to | |
2786 | * start pointing to the new name | |
2787 | */ | |
2788 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2789 | if (vs->fidp == fidp) { | |
2790 | /* | |
2791 | * we replace name of this fid towards the end | |
2792 | * so that our below strcmp will work | |
2793 | */ | |
2794 | continue; | |
2795 | } | |
2796 | if (!strncmp(vs->fidp->path.data, fidp->path.data, | |
2797 | strlen(vs->fidp->path.data))) { | |
2798 | /* replace the name */ | |
2799 | v9fs_fix_path(&fidp->path, &vs->name, | |
2800 | strlen(vs->fidp->path.data)); | |
8cf89e00 | 2801 | } |
8cf89e00 | 2802 | } |
c7b4b0b3 | 2803 | v9fs_string_copy(&vs->fidp->path, &vs->name); |
8cf89e00 AL |
2804 | } |
2805 | } | |
c7b4b0b3 MK |
2806 | out: |
2807 | v9fs_string_free(&vs->name); | |
2808 | return err; | |
2809 | } | |
2810 | ||
2811 | static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err) | |
2812 | { | |
2813 | complete_pdu(s, vs->pdu, err); | |
2814 | qemu_free(vs); | |
2815 | } | |
2816 | ||
2817 | static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) | |
2818 | { | |
2819 | if (err < 0) { | |
2820 | goto out; | |
2821 | } | |
2822 | ||
2823 | if (vs->v9stat.name.size != 0) { | |
2824 | V9fsRenameState *vr; | |
2825 | ||
783f04e1 | 2826 | vr = qemu_mallocz(sizeof(V9fsRenameState)); |
c7b4b0b3 MK |
2827 | vr->newdirfid = -1; |
2828 | vr->pdu = vs->pdu; | |
2829 | vr->fidp = vs->fidp; | |
2830 | vr->offset = vs->offset; | |
2831 | vr->name.size = vs->v9stat.name.size; | |
2832 | vr->name.data = qemu_strdup(vs->v9stat.name.data); | |
2833 | ||
2834 | err = v9fs_complete_rename(s, vr); | |
2835 | qemu_free(vr); | |
2836 | } | |
8cf89e00 AL |
2837 | v9fs_wstat_post_rename(s, vs, err); |
2838 | return; | |
2839 | ||
2840 | out: | |
2841 | v9fs_stat_free(&vs->v9stat); | |
2842 | complete_pdu(s, vs->pdu, err); | |
2843 | qemu_free(vs); | |
2844 | } | |
2845 | ||
c7b4b0b3 MK |
2846 | static void v9fs_rename(V9fsState *s, V9fsPDU *pdu) |
2847 | { | |
2848 | int32_t fid; | |
2849 | V9fsRenameState *vs; | |
2850 | ssize_t err = 0; | |
2851 | ||
2852 | vs = qemu_malloc(sizeof(*vs)); | |
2853 | vs->pdu = pdu; | |
2854 | vs->offset = 7; | |
2855 | ||
2856 | pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name); | |
2857 | ||
2858 | vs->fidp = lookup_fid(s, fid); | |
2859 | if (vs->fidp == NULL) { | |
2860 | err = -ENOENT; | |
2861 | goto out; | |
2862 | } | |
2863 | ||
d62dbb51 | 2864 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
c7b4b0b3 MK |
2865 | |
2866 | err = v9fs_complete_rename(s, vs); | |
2867 | v9fs_rename_post_rename(s, vs, err); | |
2868 | return; | |
2869 | out: | |
2870 | complete_pdu(s, vs->pdu, err); | |
2871 | qemu_free(vs); | |
2872 | } | |
2873 | ||
8cf89e00 AL |
2874 | static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2875 | { | |
2876 | if (err < 0) { | |
2877 | goto out; | |
2878 | } | |
2879 | ||
f7613bee | 2880 | if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
8cf89e00 AL |
2881 | if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid, |
2882 | vs->v9stat.n_gid)) { | |
2883 | err = -errno; | |
2884 | } | |
2885 | } | |
2886 | v9fs_wstat_post_chown(s, vs, err); | |
2887 | return; | |
2888 | ||
2889 | out: | |
2890 | v9fs_stat_free(&vs->v9stat); | |
2891 | complete_pdu(s, vs->pdu, err); | |
2892 | qemu_free(vs); | |
2893 | } | |
2894 | ||
2895 | static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) | |
2896 | { | |
2897 | if (err < 0) { | |
2898 | goto out; | |
2899 | } | |
2900 | ||
74bc02b2 | 2901 | if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
8fc39ae4 SK |
2902 | struct timespec times[2]; |
2903 | if (vs->v9stat.atime != -1) { | |
2904 | times[0].tv_sec = vs->v9stat.atime; | |
2905 | times[0].tv_nsec = 0; | |
2906 | } else { | |
2907 | times[0].tv_nsec = UTIME_OMIT; | |
2908 | } | |
2909 | if (vs->v9stat.mtime != -1) { | |
2910 | times[1].tv_sec = vs->v9stat.mtime; | |
2911 | times[1].tv_nsec = 0; | |
2912 | } else { | |
2913 | times[1].tv_nsec = UTIME_OMIT; | |
2914 | } | |
2915 | ||
2916 | if (v9fs_do_utimensat(s, &vs->fidp->path, times)) { | |
8cf89e00 AL |
2917 | err = -errno; |
2918 | } | |
2919 | } | |
2920 | ||
2921 | v9fs_wstat_post_utime(s, vs, err); | |
2922 | return; | |
2923 | ||
2924 | out: | |
2925 | v9fs_stat_free(&vs->v9stat); | |
2926 | complete_pdu(s, vs->pdu, err); | |
2927 | qemu_free(vs); | |
2928 | } | |
2929 | ||
2930 | static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) | |
2931 | { | |
2932 | if (err == -1) { | |
2933 | err = -errno; | |
2934 | } | |
2935 | v9fs_stat_free(&vs->v9stat); | |
2936 | complete_pdu(s, vs->pdu, err); | |
2937 | qemu_free(vs); | |
2938 | } | |
2939 | ||
2940 | static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) | |
2941 | { | |
2942 | uint32_t v9_mode; | |
2943 | ||
2944 | if (err == -1) { | |
2945 | err = -errno; | |
2946 | goto out; | |
2947 | } | |
2948 | ||
2949 | v9_mode = stat_to_v9mode(&vs->stbuf); | |
2950 | ||
2951 | if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2952 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2953 | /* Attempting to change the type */ | |
2954 | err = -EIO; | |
2955 | goto out; | |
2956 | } | |
2957 | ||
2958 | if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode, | |
2959 | &vs->v9stat.extension))) { | |
2960 | err = -errno; | |
2961 | } | |
2962 | v9fs_wstat_post_chmod(s, vs, err); | |
2963 | return; | |
2964 | ||
2965 | out: | |
2966 | v9fs_stat_free(&vs->v9stat); | |
2967 | complete_pdu(s, vs->pdu, err); | |
2968 | qemu_free(vs); | |
2969 | } | |
2970 | ||
9f107513 AL |
2971 | static void v9fs_wstat(V9fsState *s, V9fsPDU *pdu) |
2972 | { | |
8cf89e00 AL |
2973 | int32_t fid; |
2974 | V9fsWstatState *vs; | |
2975 | int err = 0; | |
2976 | ||
2977 | vs = qemu_malloc(sizeof(*vs)); | |
2978 | vs->pdu = pdu; | |
2979 | vs->offset = 7; | |
2980 | ||
2981 | pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat); | |
2982 | ||
2983 | vs->fidp = lookup_fid(s, fid); | |
2984 | if (vs->fidp == NULL) { | |
2985 | err = -EINVAL; | |
2986 | goto out; | |
9f107513 | 2987 | } |
8cf89e00 AL |
2988 | |
2989 | /* do we need to sync the file? */ | |
2990 | if (donttouch_stat(&vs->v9stat)) { | |
d62dbb51 | 2991 | err = v9fs_do_fsync(s, vs->fidp->fs.fd); |
8cf89e00 AL |
2992 | v9fs_wstat_post_fsync(s, vs, err); |
2993 | return; | |
2994 | } | |
2995 | ||
2996 | if (vs->v9stat.mode != -1) { | |
2997 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
2998 | v9fs_wstat_post_lstat(s, vs, err); | |
2999 | return; | |
3000 | } | |
3001 | ||
3002 | v9fs_wstat_post_chmod(s, vs, err); | |
3003 | return; | |
3004 | ||
3005 | out: | |
3006 | v9fs_stat_free(&vs->v9stat); | |
3007 | complete_pdu(s, vs->pdu, err); | |
3008 | qemu_free(vs); | |
9f107513 AL |
3009 | } |
3010 | ||
be940c87 MK |
3011 | static void v9fs_statfs_post_statfs(V9fsState *s, V9fsStatfsState *vs, int err) |
3012 | { | |
5e94c103 MK |
3013 | int32_t bsize_factor; |
3014 | ||
be940c87 MK |
3015 | if (err) { |
3016 | err = -errno; | |
3017 | goto out; | |
3018 | } | |
3019 | ||
5e94c103 MK |
3020 | /* |
3021 | * compute bsize factor based on host file system block size | |
3022 | * and client msize | |
3023 | */ | |
3024 | bsize_factor = (s->msize - P9_IOHDRSZ)/vs->stbuf.f_bsize; | |
3025 | if (!bsize_factor) { | |
3026 | bsize_factor = 1; | |
3027 | } | |
be940c87 MK |
3028 | vs->v9statfs.f_type = vs->stbuf.f_type; |
3029 | vs->v9statfs.f_bsize = vs->stbuf.f_bsize; | |
5e94c103 MK |
3030 | vs->v9statfs.f_bsize *= bsize_factor; |
3031 | /* | |
3032 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
3033 | * adjust(divide) the number of blocks, free blocks and available | |
3034 | * blocks by bsize factor | |
3035 | */ | |
3036 | vs->v9statfs.f_blocks = vs->stbuf.f_blocks/bsize_factor; | |
3037 | vs->v9statfs.f_bfree = vs->stbuf.f_bfree/bsize_factor; | |
3038 | vs->v9statfs.f_bavail = vs->stbuf.f_bavail/bsize_factor; | |
be940c87 MK |
3039 | vs->v9statfs.f_files = vs->stbuf.f_files; |
3040 | vs->v9statfs.f_ffree = vs->stbuf.f_ffree; | |
3041 | vs->v9statfs.fsid_val = (unsigned int) vs->stbuf.f_fsid.__val[0] | | |
3042 | (unsigned long long)vs->stbuf.f_fsid.__val[1] << 32; | |
3043 | vs->v9statfs.f_namelen = vs->stbuf.f_namelen; | |
3044 | ||
3045 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "ddqqqqqqd", | |
3046 | vs->v9statfs.f_type, vs->v9statfs.f_bsize, vs->v9statfs.f_blocks, | |
3047 | vs->v9statfs.f_bfree, vs->v9statfs.f_bavail, vs->v9statfs.f_files, | |
3048 | vs->v9statfs.f_ffree, vs->v9statfs.fsid_val, | |
3049 | vs->v9statfs.f_namelen); | |
3050 | ||
3051 | out: | |
3052 | complete_pdu(s, vs->pdu, vs->offset); | |
3053 | qemu_free(vs); | |
3054 | } | |
3055 | ||
3056 | static void v9fs_statfs(V9fsState *s, V9fsPDU *pdu) | |
3057 | { | |
3058 | V9fsStatfsState *vs; | |
3059 | ssize_t err = 0; | |
3060 | ||
3061 | vs = qemu_malloc(sizeof(*vs)); | |
3062 | vs->pdu = pdu; | |
3063 | vs->offset = 7; | |
3064 | ||
3065 | memset(&vs->v9statfs, 0, sizeof(vs->v9statfs)); | |
3066 | ||
3067 | pdu_unmarshal(vs->pdu, vs->offset, "d", &vs->fid); | |
3068 | ||
3069 | vs->fidp = lookup_fid(s, vs->fid); | |
3070 | if (vs->fidp == NULL) { | |
3071 | err = -ENOENT; | |
3072 | goto out; | |
3073 | } | |
3074 | ||
3075 | err = v9fs_do_statfs(s, &vs->fidp->path, &vs->stbuf); | |
3076 | v9fs_statfs_post_statfs(s, vs, err); | |
3077 | return; | |
3078 | ||
3079 | out: | |
3080 | complete_pdu(s, vs->pdu, err); | |
3081 | qemu_free(vs); | |
3082 | } | |
3083 | ||
5268cecc MK |
3084 | static void v9fs_mknod_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3085 | { | |
3086 | if (err == -1) { | |
3087 | err = -errno; | |
3088 | goto out; | |
3089 | } | |
3090 | ||
3091 | stat_to_qid(&vs->stbuf, &vs->qid); | |
3092 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
3093 | err = vs->offset; | |
3094 | out: | |
3095 | complete_pdu(s, vs->pdu, err); | |
3096 | v9fs_string_free(&vs->fullname); | |
3097 | v9fs_string_free(&vs->name); | |
3098 | qemu_free(vs); | |
3099 | } | |
3100 | ||
3101 | static void v9fs_mknod_post_mknod(V9fsState *s, V9fsMkState *vs, int err) | |
3102 | { | |
3103 | if (err == -1) { | |
3104 | err = -errno; | |
3105 | goto out; | |
3106 | } | |
3107 | ||
3108 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
3109 | v9fs_mknod_post_lstat(s, vs, err); | |
3110 | return; | |
3111 | out: | |
3112 | complete_pdu(s, vs->pdu, err); | |
3113 | v9fs_string_free(&vs->fullname); | |
3114 | v9fs_string_free(&vs->name); | |
3115 | qemu_free(vs); | |
3116 | } | |
3117 | ||
3118 | static void v9fs_mknod(V9fsState *s, V9fsPDU *pdu) | |
3119 | { | |
3120 | int32_t fid; | |
3121 | V9fsMkState *vs; | |
3122 | int err = 0; | |
3123 | V9fsFidState *fidp; | |
3124 | gid_t gid; | |
3125 | int mode; | |
3126 | int major, minor; | |
3127 | ||
3128 | vs = qemu_malloc(sizeof(*vs)); | |
3129 | vs->pdu = pdu; | |
3130 | vs->offset = 7; | |
3131 | ||
3132 | v9fs_string_init(&vs->fullname); | |
3133 | pdu_unmarshal(vs->pdu, vs->offset, "dsdddd", &fid, &vs->name, &mode, | |
3134 | &major, &minor, &gid); | |
3135 | ||
3136 | fidp = lookup_fid(s, fid); | |
3137 | if (fidp == NULL) { | |
3138 | err = -ENOENT; | |
3139 | goto out; | |
3140 | } | |
3141 | ||
3142 | v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data); | |
3143 | err = v9fs_do_mknod(s, vs->fullname.data, mode, makedev(major, minor), | |
3144 | fidp->uid, gid); | |
3145 | v9fs_mknod_post_mknod(s, vs, err); | |
3146 | return; | |
3147 | ||
3148 | out: | |
3149 | complete_pdu(s, vs->pdu, err); | |
3150 | v9fs_string_free(&vs->fullname); | |
3151 | v9fs_string_free(&vs->name); | |
3152 | qemu_free(vs); | |
3153 | } | |
3154 | ||
b67592ea MK |
3155 | static void v9fs_mkdir_post_lstat(V9fsState *s, V9fsMkState *vs, int err) |
3156 | { | |
3157 | if (err == -1) { | |
3158 | err = -errno; | |
3159 | goto out; | |
3160 | } | |
3161 | ||
3162 | stat_to_qid(&vs->stbuf, &vs->qid); | |
3163 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
3164 | err = vs->offset; | |
3165 | out: | |
3166 | complete_pdu(s, vs->pdu, err); | |
3167 | v9fs_string_free(&vs->fullname); | |
3168 | v9fs_string_free(&vs->name); | |
3169 | qemu_free(vs); | |
3170 | } | |
3171 | ||
3172 | static void v9fs_mkdir_post_mkdir(V9fsState *s, V9fsMkState *vs, int err) | |
3173 | { | |
3174 | if (err == -1) { | |
3175 | err = -errno; | |
3176 | goto out; | |
3177 | } | |
3178 | ||
3179 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
3180 | v9fs_mkdir_post_lstat(s, vs, err); | |
3181 | return; | |
3182 | out: | |
3183 | complete_pdu(s, vs->pdu, err); | |
3184 | v9fs_string_free(&vs->fullname); | |
3185 | v9fs_string_free(&vs->name); | |
3186 | qemu_free(vs); | |
3187 | } | |
3188 | ||
3189 | static void v9fs_mkdir(V9fsState *s, V9fsPDU *pdu) | |
3190 | { | |
3191 | int32_t fid; | |
3192 | V9fsMkState *vs; | |
3193 | int err = 0; | |
3194 | V9fsFidState *fidp; | |
3195 | gid_t gid; | |
3196 | int mode; | |
3197 | ||
3198 | vs = qemu_malloc(sizeof(*vs)); | |
3199 | vs->pdu = pdu; | |
3200 | vs->offset = 7; | |
3201 | ||
3202 | v9fs_string_init(&vs->fullname); | |
3203 | pdu_unmarshal(vs->pdu, vs->offset, "dsdd", &fid, &vs->name, &mode, | |
3204 | &gid); | |
3205 | ||
3206 | fidp = lookup_fid(s, fid); | |
3207 | if (fidp == NULL) { | |
3208 | err = -ENOENT; | |
3209 | goto out; | |
3210 | } | |
3211 | ||
3212 | v9fs_string_sprintf(&vs->fullname, "%s/%s", fidp->path.data, vs->name.data); | |
3213 | err = v9fs_do_mkdir(s, vs->fullname.data, mode, fidp->uid, gid); | |
3214 | v9fs_mkdir_post_mkdir(s, vs, err); | |
3215 | return; | |
3216 | ||
3217 | out: | |
3218 | complete_pdu(s, vs->pdu, err); | |
3219 | v9fs_string_free(&vs->fullname); | |
3220 | v9fs_string_free(&vs->name); | |
3221 | qemu_free(vs); | |
3222 | } | |
3223 | ||
fa32ef88 AK |
3224 | static void v9fs_post_xattr_getvalue(V9fsState *s, V9fsXattrState *vs, int err) |
3225 | { | |
3226 | ||
3227 | if (err < 0) { | |
3228 | err = -errno; | |
3229 | free_fid(s, vs->xattr_fidp->fid); | |
3230 | goto out; | |
3231 | } | |
3232 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size); | |
3233 | err = vs->offset; | |
3234 | out: | |
3235 | complete_pdu(s, vs->pdu, err); | |
3236 | v9fs_string_free(&vs->name); | |
3237 | qemu_free(vs); | |
3238 | return; | |
3239 | } | |
3240 | ||
3241 | static void v9fs_post_xattr_check(V9fsState *s, V9fsXattrState *vs, ssize_t err) | |
3242 | { | |
3243 | if (err < 0) { | |
3244 | err = -errno; | |
3245 | free_fid(s, vs->xattr_fidp->fid); | |
3246 | goto out; | |
3247 | } | |
3248 | /* | |
3249 | * Read the xattr value | |
3250 | */ | |
3251 | vs->xattr_fidp->fs.xattr.len = vs->size; | |
3252 | vs->xattr_fidp->fid_type = P9_FID_XATTR; | |
3253 | vs->xattr_fidp->fs.xattr.copied_len = -1; | |
3254 | if (vs->size) { | |
3255 | vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); | |
3256 | err = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, | |
3257 | &vs->name, vs->xattr_fidp->fs.xattr.value, | |
3258 | vs->xattr_fidp->fs.xattr.len); | |
3259 | } | |
3260 | v9fs_post_xattr_getvalue(s, vs, err); | |
3261 | return; | |
3262 | out: | |
3263 | complete_pdu(s, vs->pdu, err); | |
3264 | v9fs_string_free(&vs->name); | |
3265 | qemu_free(vs); | |
3266 | } | |
3267 | ||
3268 | static void v9fs_post_lxattr_getvalue(V9fsState *s, | |
3269 | V9fsXattrState *vs, int err) | |
3270 | { | |
3271 | if (err < 0) { | |
3272 | err = -errno; | |
3273 | free_fid(s, vs->xattr_fidp->fid); | |
3274 | goto out; | |
3275 | } | |
3276 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "q", vs->size); | |
3277 | err = vs->offset; | |
3278 | out: | |
3279 | complete_pdu(s, vs->pdu, err); | |
3280 | v9fs_string_free(&vs->name); | |
3281 | qemu_free(vs); | |
3282 | return; | |
3283 | } | |
3284 | ||
3285 | static void v9fs_post_lxattr_check(V9fsState *s, | |
3286 | V9fsXattrState *vs, ssize_t err) | |
3287 | { | |
3288 | if (err < 0) { | |
3289 | err = -errno; | |
3290 | free_fid(s, vs->xattr_fidp->fid); | |
3291 | goto out; | |
3292 | } | |
3293 | /* | |
3294 | * Read the xattr value | |
3295 | */ | |
3296 | vs->xattr_fidp->fs.xattr.len = vs->size; | |
3297 | vs->xattr_fidp->fid_type = P9_FID_XATTR; | |
3298 | vs->xattr_fidp->fs.xattr.copied_len = -1; | |
3299 | if (vs->size) { | |
3300 | vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); | |
3301 | err = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, | |
3302 | vs->xattr_fidp->fs.xattr.value, | |
3303 | vs->xattr_fidp->fs.xattr.len); | |
3304 | } | |
3305 | v9fs_post_lxattr_getvalue(s, vs, err); | |
3306 | return; | |
3307 | out: | |
3308 | complete_pdu(s, vs->pdu, err); | |
3309 | v9fs_string_free(&vs->name); | |
3310 | qemu_free(vs); | |
3311 | } | |
3312 | ||
3313 | static void v9fs_xattrwalk(V9fsState *s, V9fsPDU *pdu) | |
3314 | { | |
3315 | ssize_t err = 0; | |
3316 | V9fsXattrState *vs; | |
3317 | int32_t fid, newfid; | |
3318 | ||
3319 | vs = qemu_malloc(sizeof(*vs)); | |
3320 | vs->pdu = pdu; | |
3321 | vs->offset = 7; | |
3322 | ||
3323 | pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &newfid, &vs->name); | |
3324 | vs->file_fidp = lookup_fid(s, fid); | |
3325 | if (vs->file_fidp == NULL) { | |
3326 | err = -ENOENT; | |
3327 | goto out; | |
3328 | } | |
3329 | ||
3330 | vs->xattr_fidp = alloc_fid(s, newfid); | |
3331 | if (vs->xattr_fidp == NULL) { | |
3332 | err = -EINVAL; | |
3333 | goto out; | |
3334 | } | |
3335 | ||
3336 | v9fs_string_copy(&vs->xattr_fidp->path, &vs->file_fidp->path); | |
3337 | if (vs->name.data[0] == 0) { | |
3338 | /* | |
3339 | * listxattr request. Get the size first | |
3340 | */ | |
3341 | vs->size = v9fs_do_llistxattr(s, &vs->xattr_fidp->path, | |
3342 | NULL, 0); | |
3343 | if (vs->size < 0) { | |
3344 | err = vs->size; | |
3345 | } | |
3346 | v9fs_post_lxattr_check(s, vs, err); | |
3347 | return; | |
3348 | } else { | |
3349 | /* | |
3350 | * specific xattr fid. We check for xattr | |
3351 | * presence also collect the xattr size | |
3352 | */ | |
3353 | vs->size = v9fs_do_lgetxattr(s, &vs->xattr_fidp->path, | |
3354 | &vs->name, NULL, 0); | |
3355 | if (vs->size < 0) { | |
3356 | err = vs->size; | |
3357 | } | |
3358 | v9fs_post_xattr_check(s, vs, err); | |
3359 | return; | |
3360 | } | |
3361 | out: | |
3362 | complete_pdu(s, vs->pdu, err); | |
3363 | v9fs_string_free(&vs->name); | |
3364 | qemu_free(vs); | |
3365 | } | |
3366 | ||
10b468bd AK |
3367 | static void v9fs_xattrcreate(V9fsState *s, V9fsPDU *pdu) |
3368 | { | |
3369 | int flags; | |
3370 | int32_t fid; | |
3371 | ssize_t err = 0; | |
3372 | V9fsXattrState *vs; | |
3373 | ||
3374 | vs = qemu_malloc(sizeof(*vs)); | |
3375 | vs->pdu = pdu; | |
3376 | vs->offset = 7; | |
3377 | ||
3378 | pdu_unmarshal(vs->pdu, vs->offset, "dsqd", | |
3379 | &fid, &vs->name, &vs->size, &flags); | |
3380 | ||
3381 | vs->file_fidp = lookup_fid(s, fid); | |
3382 | if (vs->file_fidp == NULL) { | |
3383 | err = -EINVAL; | |
3384 | goto out; | |
3385 | } | |
3386 | ||
3387 | /* Make the file fid point to xattr */ | |
3388 | vs->xattr_fidp = vs->file_fidp; | |
3389 | vs->xattr_fidp->fid_type = P9_FID_XATTR; | |
3390 | vs->xattr_fidp->fs.xattr.copied_len = 0; | |
3391 | vs->xattr_fidp->fs.xattr.len = vs->size; | |
3392 | vs->xattr_fidp->fs.xattr.flags = flags; | |
3393 | v9fs_string_init(&vs->xattr_fidp->fs.xattr.name); | |
3394 | v9fs_string_copy(&vs->xattr_fidp->fs.xattr.name, &vs->name); | |
9ed3ef26 AK |
3395 | if (vs->size) |
3396 | vs->xattr_fidp->fs.xattr.value = qemu_malloc(vs->size); | |
3397 | else | |
3398 | vs->xattr_fidp->fs.xattr.value = NULL; | |
10b468bd AK |
3399 | |
3400 | out: | |
3401 | complete_pdu(s, vs->pdu, err); | |
3402 | v9fs_string_free(&vs->name); | |
3403 | qemu_free(vs); | |
3404 | } | |
fa32ef88 | 3405 | |
9f107513 AL |
3406 | typedef void (pdu_handler_t)(V9fsState *s, V9fsPDU *pdu); |
3407 | ||
3408 | static pdu_handler_t *pdu_handlers[] = { | |
c18e2f94 | 3409 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3410 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3411 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3412 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 3413 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 3414 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 3415 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 3416 | [P9_TRENAME] = v9fs_rename, |
b67592ea | 3417 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 3418 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 3419 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
3420 | [P9_TATTACH] = v9fs_attach, |
3421 | [P9_TSTAT] = v9fs_stat, | |
3422 | [P9_TWALK] = v9fs_walk, | |
3423 | [P9_TCLUNK] = v9fs_clunk, | |
3424 | [P9_TOPEN] = v9fs_open, | |
3425 | [P9_TREAD] = v9fs_read, | |
3426 | #if 0 | |
3427 | [P9_TAUTH] = v9fs_auth, | |
3428 | #endif | |
3429 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3430 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3431 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3432 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3433 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3434 | [P9_TWRITE] = v9fs_write, |
3435 | [P9_TWSTAT] = v9fs_wstat, | |
3436 | [P9_TREMOVE] = v9fs_remove, | |
3437 | }; | |
3438 | ||
3439 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) | |
3440 | { | |
3441 | pdu_handler_t *handler; | |
3442 | ||
3443 | if (debug_9p_pdu) { | |
3444 | pprint_pdu(pdu); | |
3445 | } | |
3446 | ||
3447 | BUG_ON(pdu->id >= ARRAY_SIZE(pdu_handlers)); | |
3448 | ||
3449 | handler = pdu_handlers[pdu->id]; | |
3450 | BUG_ON(handler == NULL); | |
3451 | ||
3452 | handler(s, pdu); | |
3453 | } | |
3454 | ||
3455 | static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) | |
3456 | { | |
3457 | V9fsState *s = (V9fsState *)vdev; | |
3458 | V9fsPDU *pdu; | |
3459 | ssize_t len; | |
3460 | ||
3461 | while ((pdu = alloc_pdu(s)) && | |
3462 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
3463 | uint8_t *ptr; | |
3464 | ||
3465 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); | |
3466 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
3467 | ||
3468 | ptr = pdu->elem.out_sg[0].iov_base; | |
3469 | ||
3470 | memcpy(&pdu->size, ptr, 4); | |
3471 | pdu->id = ptr[4]; | |
3472 | memcpy(&pdu->tag, ptr + 5, 2); | |
3473 | ||
3474 | submit_pdu(s, pdu); | |
3475 | } | |
3476 | ||
3477 | free_pdu(s, pdu); | |
3478 | } | |
3479 | ||
3480 | static uint32_t virtio_9p_get_features(VirtIODevice *vdev, uint32_t features) | |
3481 | { | |
3482 | features |= 1 << VIRTIO_9P_MOUNT_TAG; | |
3483 | return features; | |
3484 | } | |
3485 | ||
3486 | static V9fsState *to_virtio_9p(VirtIODevice *vdev) | |
3487 | { | |
3488 | return (V9fsState *)vdev; | |
3489 | } | |
3490 | ||
3491 | static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config) | |
3492 | { | |
3493 | struct virtio_9p_config *cfg; | |
3494 | V9fsState *s = to_virtio_9p(vdev); | |
3495 | ||
3496 | cfg = qemu_mallocz(sizeof(struct virtio_9p_config) + | |
3497 | s->tag_len); | |
3498 | stw_raw(&cfg->tag_len, s->tag_len); | |
3499 | memcpy(cfg->tag, s->tag, s->tag_len); | |
3500 | memcpy(config, cfg, s->config_size); | |
3501 | qemu_free(cfg); | |
3502 | } | |
3503 | ||
3504 | VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) | |
3505 | { | |
3506 | V9fsState *s; | |
3507 | int i, len; | |
3508 | struct stat stat; | |
3509 | FsTypeEntry *fse; | |
3510 | ||
3511 | ||
3512 | s = (V9fsState *)virtio_common_init("virtio-9p", | |
3513 | VIRTIO_ID_9P, | |
3514 | sizeof(struct virtio_9p_config)+ | |
3515 | MAX_TAG_LEN, | |
3516 | sizeof(V9fsState)); | |
3517 | ||
3518 | /* initialize pdu allocator */ | |
3519 | QLIST_INIT(&s->free_list); | |
3520 | for (i = 0; i < (MAX_REQ - 1); i++) { | |
3521 | QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next); | |
3522 | } | |
3523 | ||
3524 | s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output); | |
3525 | ||
3526 | fse = get_fsdev_fsentry(conf->fsdev_id); | |
3527 | ||
3528 | if (!fse) { | |
3529 | /* We don't have a fsdev identified by fsdev_id */ | |
3530 | fprintf(stderr, "Virtio-9p device couldn't find fsdev " | |
3531 | "with the id %s\n", conf->fsdev_id); | |
3532 | exit(1); | |
3533 | } | |
3534 | ||
3535 | if (!fse->path || !conf->tag) { | |
3536 | /* we haven't specified a mount_tag or the path */ | |
3537 | fprintf(stderr, "fsdev with id %s needs path " | |
3538 | "and Virtio-9p device needs mount_tag arguments\n", | |
3539 | conf->fsdev_id); | |
3540 | exit(1); | |
3541 | } | |
3542 | ||
758e8e38 VJ |
3543 | if (!strcmp(fse->security_model, "passthrough")) { |
3544 | /* Files on the Fileserver set to client user credentials */ | |
3545 | s->ctx.fs_sm = SM_PASSTHROUGH; | |
3546 | } else if (!strcmp(fse->security_model, "mapped")) { | |
3547 | /* Files on the fileserver are set to QEMU credentials. | |
3548 | * Client user credentials are saved in extended attributes. | |
3549 | */ | |
3550 | s->ctx.fs_sm = SM_MAPPED; | |
12848bfc AK |
3551 | } else if (!strcmp(fse->security_model, "none")) { |
3552 | /* | |
3553 | * Files on the fileserver are set to QEMU credentials. | |
3554 | */ | |
3555 | s->ctx.fs_sm = SM_NONE; | |
3556 | ||
758e8e38 | 3557 | } else { |
12848bfc AK |
3558 | fprintf(stderr, "Default to security_model=none. You may want" |
3559 | " enable advanced security model using " | |
9ce56db6 VJ |
3560 | "security option:\n\t security_model=passthrough \n\t " |
3561 | "security_model=mapped\n"); | |
12848bfc | 3562 | s->ctx.fs_sm = SM_NONE; |
9ce56db6 VJ |
3563 | } |
3564 | ||
9f107513 AL |
3565 | if (lstat(fse->path, &stat)) { |
3566 | fprintf(stderr, "share path %s does not exist\n", fse->path); | |
3567 | exit(1); | |
3568 | } else if (!S_ISDIR(stat.st_mode)) { | |
3569 | fprintf(stderr, "share path %s is not a directory \n", fse->path); | |
3570 | exit(1); | |
3571 | } | |
3572 | ||
3573 | s->ctx.fs_root = qemu_strdup(fse->path); | |
3574 | len = strlen(conf->tag); | |
3575 | if (len > MAX_TAG_LEN) { | |
3576 | len = MAX_TAG_LEN; | |
3577 | } | |
3578 | /* s->tag is non-NULL terminated string */ | |
3579 | s->tag = qemu_malloc(len); | |
3580 | memcpy(s->tag, conf->tag, len); | |
3581 | s->tag_len = len; | |
3582 | s->ctx.uid = -1; | |
3583 | ||
3584 | s->ops = fse->ops; | |
3585 | s->vdev.get_features = virtio_9p_get_features; | |
3586 | s->config_size = sizeof(struct virtio_9p_config) + | |
3587 | s->tag_len; | |
3588 | s->vdev.get_config = virtio_9p_get_config; | |
3589 | ||
3590 | return &s->vdev; | |
3591 | } |