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Commit | Line | Data |
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9f107513 AL |
1 | /* |
2 | * Virtio 9p backend | |
3 | * | |
4 | * Copyright IBM, Corp. 2010 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
873c3213 SW |
14 | #include "hw/virtio.h" |
15 | #include "hw/pc.h" | |
9f107513 | 16 | #include "qemu_socket.h" |
873c3213 | 17 | #include "hw/virtio-pci.h" |
9f107513 AL |
18 | #include "virtio-9p.h" |
19 | #include "fsdev/qemu-fsdev.h" | |
20 | #include "virtio-9p-debug.h" | |
fc22118d | 21 | #include "virtio-9p-xattr.h" |
ff06030f | 22 | #include "virtio-9p-coth.h" |
9f107513 | 23 | |
9f107513 AL |
24 | int debug_9p_pdu; |
25 | ||
fac4f111 VJJ |
26 | enum { |
27 | Oread = 0x00, | |
28 | Owrite = 0x01, | |
29 | Ordwr = 0x02, | |
30 | Oexec = 0x03, | |
31 | Oexcl = 0x04, | |
32 | Otrunc = 0x10, | |
33 | Orexec = 0x20, | |
34 | Orclose = 0x40, | |
35 | Oappend = 0x80, | |
36 | }; | |
37 | ||
38 | static int omode_to_uflags(int8_t mode) | |
39 | { | |
40 | int ret = 0; | |
41 | ||
42 | switch (mode & 3) { | |
43 | case Oread: | |
44 | ret = O_RDONLY; | |
45 | break; | |
46 | case Ordwr: | |
47 | ret = O_RDWR; | |
48 | break; | |
49 | case Owrite: | |
50 | ret = O_WRONLY; | |
51 | break; | |
52 | case Oexec: | |
53 | ret = O_RDONLY; | |
54 | break; | |
55 | } | |
56 | ||
57 | if (mode & Otrunc) { | |
58 | ret |= O_TRUNC; | |
59 | } | |
60 | ||
61 | if (mode & Oappend) { | |
62 | ret |= O_APPEND; | |
63 | } | |
64 | ||
65 | if (mode & Oexcl) { | |
66 | ret |= O_EXCL; | |
67 | } | |
68 | ||
69 | return ret; | |
70 | } | |
71 | ||
758e8e38 | 72 | void cred_init(FsCred *credp) |
131dcb25 | 73 | { |
758e8e38 VJJ |
74 | credp->fc_uid = -1; |
75 | credp->fc_gid = -1; | |
76 | credp->fc_mode = -1; | |
77 | credp->fc_rdev = -1; | |
131dcb25 AL |
78 | } |
79 | ||
758e8e38 | 80 | static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
131dcb25 | 81 | { |
758e8e38 | 82 | return s->ops->lstat(&s->ctx, path->data, stbuf); |
131dcb25 AL |
83 | } |
84 | ||
131dcb25 AL |
85 | static int v9fs_do_close(V9fsState *s, int fd) |
86 | { | |
87 | return s->ops->close(&s->ctx, fd); | |
88 | } | |
89 | ||
90 | static int v9fs_do_closedir(V9fsState *s, DIR *dir) | |
91 | { | |
92 | return s->ops->closedir(&s->ctx, dir); | |
93 | } | |
94 | ||
a6568fe2 AL |
95 | static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
96 | { | |
97 | return s->ops->open(&s->ctx, path->data, flags); | |
98 | } | |
99 | ||
100 | static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path) | |
101 | { | |
102 | return s->ops->opendir(&s->ctx, path->data); | |
103 | } | |
104 | ||
a9231555 AL |
105 | static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
106 | { | |
107 | return s->ops->rewinddir(&s->ctx, dir); | |
108 | } | |
109 | ||
110 | static off_t v9fs_do_telldir(V9fsState *s, DIR *dir) | |
111 | { | |
112 | return s->ops->telldir(&s->ctx, dir); | |
113 | } | |
114 | ||
a9231555 AL |
115 | static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
116 | { | |
117 | return s->ops->seekdir(&s->ctx, dir, off); | |
118 | } | |
119 | ||
56d15a53 SG |
120 | static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov, |
121 | int iovcnt, int64_t offset) | |
a9231555 | 122 | { |
56d15a53 | 123 | return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset); |
a9231555 AL |
124 | } |
125 | ||
56d15a53 SG |
126 | static int v9fs_do_pwritev(V9fsState *s, int fd, const struct iovec *iov, |
127 | int iovcnt, int64_t offset) | |
a9231555 | 128 | { |
56d15a53 | 129 | return s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset); |
8449360c AL |
130 | } |
131 | ||
c494dd6f AL |
132 | static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
133 | { | |
e95ead32 VJJ |
134 | FsCred cred; |
135 | cred_init(&cred); | |
136 | cred.fc_mode = mode; | |
137 | return s->ops->chmod(&s->ctx, path->data, &cred); | |
c494dd6f AL |
138 | } |
139 | ||
5268cecc MK |
140 | static int v9fs_do_mknod(V9fsState *s, char *name, |
141 | mode_t mode, dev_t dev, uid_t uid, gid_t gid) | |
c494dd6f | 142 | { |
1c293312 VJJ |
143 | FsCred cred; |
144 | cred_init(&cred); | |
5268cecc MK |
145 | cred.fc_uid = uid; |
146 | cred.fc_gid = gid; | |
1c293312 VJJ |
147 | cred.fc_mode = mode; |
148 | cred.fc_rdev = dev; | |
5268cecc | 149 | return s->ops->mknod(&s->ctx, name, &cred); |
c494dd6f AL |
150 | } |
151 | ||
c494dd6f AL |
152 | static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
153 | { | |
154 | return s->ops->fstat(&s->ctx, fd, stbuf); | |
155 | } | |
156 | ||
c1568af5 VJJ |
157 | static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid, |
158 | int flags, int mode) | |
c494dd6f | 159 | { |
4750a96f | 160 | FsCred cred; |
4750a96f VJJ |
161 | |
162 | cred_init(&cred); | |
c1568af5 VJJ |
163 | cred.fc_uid = uid; |
164 | cred.fc_gid = gid; | |
165 | cred.fc_mode = mode & 07777; | |
4750a96f | 166 | |
c1568af5 | 167 | return s->ops->open2(&s->ctx, fullname, flags, &cred); |
c494dd6f AL |
168 | } |
169 | ||
08c60fc9 VJJ |
170 | static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
171 | const char *oldpath, const char *newpath, gid_t gid) | |
c494dd6f | 172 | { |
879c2813 VJJ |
173 | FsCred cred; |
174 | cred_init(&cred); | |
08c60fc9 VJJ |
175 | cred.fc_uid = fidp->uid; |
176 | cred.fc_gid = gid; | |
177 | cred.fc_mode = 0777; | |
879c2813 | 178 | |
08c60fc9 | 179 | return s->ops->symlink(&s->ctx, oldpath, newpath, &cred); |
c494dd6f AL |
180 | } |
181 | ||
182 | static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) | |
183 | { | |
184 | return s->ops->link(&s->ctx, oldpath->data, newpath->data); | |
185 | } | |
186 | ||
8cf89e00 AL |
187 | static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
188 | { | |
189 | return s->ops->truncate(&s->ctx, path->data, size); | |
190 | } | |
191 | ||
192 | static int v9fs_do_rename(V9fsState *s, V9fsString *oldpath, | |
193 | V9fsString *newpath) | |
194 | { | |
195 | return s->ops->rename(&s->ctx, oldpath->data, newpath->data); | |
196 | } | |
197 | ||
198 | static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) | |
199 | { | |
f7613bee VJJ |
200 | FsCred cred; |
201 | cred_init(&cred); | |
202 | cred.fc_uid = uid; | |
203 | cred.fc_gid = gid; | |
204 | ||
205 | return s->ops->chown(&s->ctx, path->data, &cred); | |
8cf89e00 AL |
206 | } |
207 | ||
8fc39ae4 SK |
208 | static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
209 | const struct timespec times[2]) | |
8cf89e00 | 210 | { |
8fc39ae4 | 211 | return s->ops->utimensat(&s->ctx, path->data, times); |
8cf89e00 AL |
212 | } |
213 | ||
5bae1900 AL |
214 | static int v9fs_do_remove(V9fsState *s, V9fsString *path) |
215 | { | |
216 | return s->ops->remove(&s->ctx, path->data); | |
217 | } | |
218 | ||
49594973 | 219 | static int v9fs_do_fsync(V9fsState *s, int fd, int datasync) |
8cf89e00 | 220 | { |
49594973 | 221 | return s->ops->fsync(&s->ctx, fd, datasync); |
8cf89e00 AL |
222 | } |
223 | ||
5e94c103 MK |
224 | static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
225 | { | |
226 | return s->ops->statfs(&s->ctx, path->data, stbuf); | |
227 | } | |
228 | ||
10b468bd AK |
229 | static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
230 | V9fsString *xattr_name, | |
231 | void *value, size_t size, int flags) | |
232 | { | |
233 | return s->ops->lsetxattr(&s->ctx, path->data, | |
234 | xattr_name->data, value, size, flags); | |
235 | } | |
236 | ||
9ed3ef26 AK |
237 | static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path, |
238 | V9fsString *xattr_name) | |
239 | { | |
240 | return s->ops->lremovexattr(&s->ctx, path->data, | |
241 | xattr_name->data); | |
242 | } | |
243 | ||
244 | ||
a03f7874 AL |
245 | static void v9fs_string_init(V9fsString *str) |
246 | { | |
247 | str->data = NULL; | |
248 | str->size = 0; | |
249 | } | |
250 | ||
251 | static void v9fs_string_free(V9fsString *str) | |
252 | { | |
253 | qemu_free(str->data); | |
254 | str->data = NULL; | |
255 | str->size = 0; | |
256 | } | |
257 | ||
258 | static void v9fs_string_null(V9fsString *str) | |
259 | { | |
260 | v9fs_string_free(str); | |
261 | } | |
262 | ||
263 | static int number_to_string(void *arg, char type) | |
264 | { | |
265 | unsigned int ret = 0; | |
266 | ||
267 | switch (type) { | |
268 | case 'u': { | |
269 | unsigned int num = *(unsigned int *)arg; | |
270 | ||
271 | do { | |
272 | ret++; | |
273 | num = num/10; | |
274 | } while (num); | |
275 | break; | |
276 | } | |
45b23ff8 VJJ |
277 | case 'U': { |
278 | unsigned long num = *(unsigned long *)arg; | |
279 | do { | |
280 | ret++; | |
281 | num = num/10; | |
282 | } while (num); | |
283 | break; | |
284 | } | |
a03f7874 AL |
285 | default: |
286 | printf("Number_to_string: Unknown number format\n"); | |
287 | return -1; | |
288 | } | |
289 | ||
290 | return ret; | |
291 | } | |
292 | ||
c9ba47dc SW |
293 | static int GCC_FMT_ATTR(2, 0) |
294 | v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
a03f7874 AL |
295 | { |
296 | va_list ap2; | |
297 | char *iter = (char *)fmt; | |
298 | int len = 0; | |
299 | int nr_args = 0; | |
300 | char *arg_char_ptr; | |
301 | unsigned int arg_uint; | |
45b23ff8 | 302 | unsigned long arg_ulong; |
a03f7874 AL |
303 | |
304 | /* Find the number of %'s that denotes an argument */ | |
305 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
306 | nr_args++; | |
307 | iter++; | |
308 | } | |
309 | ||
310 | len = strlen(fmt) - 2*nr_args; | |
311 | ||
312 | if (!nr_args) { | |
313 | goto alloc_print; | |
314 | } | |
315 | ||
316 | va_copy(ap2, ap); | |
317 | ||
318 | iter = (char *)fmt; | |
319 | ||
320 | /* Now parse the format string */ | |
321 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
322 | iter++; | |
323 | switch (*iter) { | |
324 | case 'u': | |
325 | arg_uint = va_arg(ap2, unsigned int); | |
326 | len += number_to_string((void *)&arg_uint, 'u'); | |
327 | break; | |
45b23ff8 VJJ |
328 | case 'l': |
329 | if (*++iter == 'u') { | |
330 | arg_ulong = va_arg(ap2, unsigned long); | |
331 | len += number_to_string((void *)&arg_ulong, 'U'); | |
332 | } else { | |
333 | return -1; | |
334 | } | |
335 | break; | |
a03f7874 AL |
336 | case 's': |
337 | arg_char_ptr = va_arg(ap2, char *); | |
338 | len += strlen(arg_char_ptr); | |
339 | break; | |
340 | case 'c': | |
341 | len += 1; | |
342 | break; | |
343 | default: | |
344 | fprintf(stderr, | |
345 | "v9fs_string_alloc_printf:Incorrect format %c", *iter); | |
346 | return -1; | |
347 | } | |
348 | iter++; | |
349 | } | |
350 | ||
351 | alloc_print: | |
352 | *strp = qemu_malloc((len + 1) * sizeof(**strp)); | |
353 | ||
354 | return vsprintf(*strp, fmt, ap); | |
355 | } | |
356 | ||
c9ba47dc SW |
357 | static void GCC_FMT_ATTR(2, 3) |
358 | v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
a03f7874 AL |
359 | { |
360 | va_list ap; | |
361 | int err; | |
362 | ||
363 | v9fs_string_free(str); | |
364 | ||
365 | va_start(ap, fmt); | |
366 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
367 | BUG_ON(err == -1); | |
368 | va_end(ap); | |
369 | ||
370 | str->size = err; | |
371 | } | |
372 | ||
373 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
374 | { | |
375 | v9fs_string_free(lhs); | |
376 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
377 | } | |
378 | ||
936532a4 MN |
379 | /* |
380 | * Return TRUE if s1 is an ancestor of s2. | |
381 | * | |
382 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". | |
383 | * As a special case, We treat s1 as ancestor of s2 if they are same! | |
384 | */ | |
385 | static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2) | |
386 | { | |
387 | if (!strncmp(s1->data, s2->data, s1->size)) { | |
388 | if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') { | |
389 | return 1; | |
390 | } | |
391 | } | |
392 | return 0; | |
393 | } | |
394 | ||
a03f7874 AL |
395 | static size_t v9fs_string_size(V9fsString *str) |
396 | { | |
397 | return str->size; | |
398 | } | |
399 | ||
286d5652 AL |
400 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
401 | { | |
402 | V9fsFidState *f; | |
403 | ||
404 | for (f = s->fid_list; f; f = f->next) { | |
405 | if (f->fid == fid) { | |
286d5652 AL |
406 | return f; |
407 | } | |
408 | } | |
409 | ||
410 | return NULL; | |
411 | } | |
412 | ||
413 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
414 | { | |
415 | V9fsFidState *f; | |
416 | ||
417 | f = lookup_fid(s, fid); | |
418 | if (f) { | |
419 | return NULL; | |
420 | } | |
421 | ||
422 | f = qemu_mallocz(sizeof(V9fsFidState)); | |
423 | ||
424 | f->fid = fid; | |
d62dbb51 | 425 | f->fid_type = P9_FID_NONE; |
286d5652 AL |
426 | |
427 | f->next = s->fid_list; | |
428 | s->fid_list = f; | |
429 | ||
430 | return f; | |
431 | } | |
432 | ||
10b468bd AK |
433 | static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
434 | { | |
435 | int retval = 0; | |
436 | ||
437 | if (fidp->fs.xattr.copied_len == -1) { | |
438 | /* getxattr/listxattr fid */ | |
439 | goto free_value; | |
440 | } | |
441 | /* | |
442 | * if this is fid for setxattr. clunk should | |
443 | * result in setxattr localcall | |
444 | */ | |
445 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
446 | /* clunk after partial write */ | |
447 | retval = -EINVAL; | |
448 | goto free_out; | |
449 | } | |
9ed3ef26 AK |
450 | if (fidp->fs.xattr.len) { |
451 | retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, | |
452 | fidp->fs.xattr.value, | |
453 | fidp->fs.xattr.len, | |
454 | fidp->fs.xattr.flags); | |
455 | } else { | |
456 | retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); | |
457 | } | |
10b468bd AK |
458 | free_out: |
459 | v9fs_string_free(&fidp->fs.xattr.name); | |
460 | free_value: | |
461 | if (fidp->fs.xattr.value) { | |
462 | qemu_free(fidp->fs.xattr.value); | |
463 | } | |
464 | return retval; | |
465 | } | |
466 | ||
286d5652 AL |
467 | static int free_fid(V9fsState *s, int32_t fid) |
468 | { | |
10b468bd | 469 | int retval = 0; |
286d5652 AL |
470 | V9fsFidState **fidpp, *fidp; |
471 | ||
472 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
473 | if ((*fidpp)->fid == fid) { | |
474 | break; | |
475 | } | |
476 | } | |
477 | ||
478 | if (*fidpp == NULL) { | |
479 | return -ENOENT; | |
480 | } | |
481 | ||
482 | fidp = *fidpp; | |
483 | *fidpp = fidp->next; | |
484 | ||
d62dbb51 AK |
485 | if (fidp->fid_type == P9_FID_FILE) { |
486 | v9fs_do_close(s, fidp->fs.fd); | |
487 | } else if (fidp->fid_type == P9_FID_DIR) { | |
488 | v9fs_do_closedir(s, fidp->fs.dir); | |
489 | } else if (fidp->fid_type == P9_FID_XATTR) { | |
10b468bd | 490 | retval = v9fs_xattr_fid_clunk(s, fidp); |
286d5652 AL |
491 | } |
492 | v9fs_string_free(&fidp->path); | |
493 | qemu_free(fidp); | |
494 | ||
10b468bd | 495 | return retval; |
286d5652 AL |
496 | } |
497 | ||
498 | #define P9_QID_TYPE_DIR 0x80 | |
499 | #define P9_QID_TYPE_SYMLINK 0x02 | |
500 | ||
501 | #define P9_STAT_MODE_DIR 0x80000000 | |
502 | #define P9_STAT_MODE_APPEND 0x40000000 | |
503 | #define P9_STAT_MODE_EXCL 0x20000000 | |
504 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
505 | #define P9_STAT_MODE_AUTH 0x08000000 | |
506 | #define P9_STAT_MODE_TMP 0x04000000 | |
507 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
508 | #define P9_STAT_MODE_LINK 0x01000000 | |
509 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
510 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
511 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
512 | #define P9_STAT_MODE_SETUID 0x00080000 | |
513 | #define P9_STAT_MODE_SETGID 0x00040000 | |
514 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
515 | ||
516 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
517 | P9_STAT_MODE_SYMLINK | \ | |
518 | P9_STAT_MODE_LINK | \ | |
519 | P9_STAT_MODE_DEVICE | \ | |
520 | P9_STAT_MODE_NAMED_PIPE | \ | |
521 | P9_STAT_MODE_SOCKET) | |
522 | ||
523 | /* This is the algorithm from ufs in spfs */ | |
524 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
525 | { | |
526 | size_t size; | |
527 | ||
528 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
529 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
530 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
531 | qidp->type = 0; | |
532 | if (S_ISDIR(stbuf->st_mode)) { | |
533 | qidp->type |= P9_QID_TYPE_DIR; | |
534 | } | |
535 | if (S_ISLNK(stbuf->st_mode)) { | |
536 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
537 | } | |
538 | } | |
539 | ||
540 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
541 | { | |
542 | struct stat stbuf; | |
543 | int err; | |
544 | ||
545 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
546 | if (err) { | |
547 | return err; | |
548 | } | |
549 | ||
550 | stat_to_qid(&stbuf, qidp); | |
551 | return 0; | |
552 | } | |
553 | ||
9f107513 AL |
554 | static V9fsPDU *alloc_pdu(V9fsState *s) |
555 | { | |
556 | V9fsPDU *pdu = NULL; | |
557 | ||
558 | if (!QLIST_EMPTY(&s->free_list)) { | |
559 | pdu = QLIST_FIRST(&s->free_list); | |
560 | QLIST_REMOVE(pdu, next); | |
561 | } | |
562 | return pdu; | |
563 | } | |
564 | ||
565 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
566 | { | |
567 | if (pdu) { | |
39792515 AK |
568 | if (debug_9p_pdu) { |
569 | pprint_pdu(pdu); | |
570 | } | |
571 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
9f107513 AL |
572 | } |
573 | } | |
574 | ||
575 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
576 | size_t offset, size_t size, int pack) | |
577 | { | |
578 | int i = 0; | |
579 | size_t copied = 0; | |
580 | ||
581 | for (i = 0; size && i < sg_count; i++) { | |
582 | size_t len; | |
583 | if (offset >= sg[i].iov_len) { | |
584 | /* skip this sg */ | |
585 | offset -= sg[i].iov_len; | |
586 | continue; | |
587 | } else { | |
588 | len = MIN(sg[i].iov_len - offset, size); | |
589 | if (pack) { | |
590 | memcpy(sg[i].iov_base + offset, addr, len); | |
591 | } else { | |
592 | memcpy(addr, sg[i].iov_base + offset, len); | |
593 | } | |
594 | size -= len; | |
595 | copied += len; | |
596 | addr += len; | |
597 | if (size) { | |
598 | offset = 0; | |
599 | continue; | |
600 | } | |
601 | } | |
602 | } | |
603 | ||
604 | return copied; | |
605 | } | |
606 | ||
405a549a AL |
607 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
608 | { | |
609 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
610 | offset, size, 0); | |
611 | } | |
612 | ||
613 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
614 | size_t size) | |
615 | { | |
616 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
617 | offset, size, 1); | |
618 | } | |
619 | ||
620 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
621 | { | |
622 | size_t pos = 0; | |
623 | int i, j; | |
624 | struct iovec *src_sg; | |
625 | unsigned int num; | |
626 | ||
627 | if (rx) { | |
628 | src_sg = pdu->elem.in_sg; | |
629 | num = pdu->elem.in_num; | |
630 | } else { | |
631 | src_sg = pdu->elem.out_sg; | |
632 | num = pdu->elem.out_num; | |
633 | } | |
634 | ||
635 | j = 0; | |
636 | for (i = 0; i < num; i++) { | |
637 | if (offset <= pos) { | |
638 | sg[j].iov_base = src_sg[i].iov_base; | |
639 | sg[j].iov_len = src_sg[i].iov_len; | |
640 | j++; | |
641 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
642 | sg[j].iov_base = src_sg[i].iov_base; | |
643 | sg[j].iov_len = src_sg[i].iov_len; | |
644 | sg[j].iov_base += (offset - pos); | |
645 | sg[j].iov_len -= (offset - pos); | |
646 | j++; | |
647 | } | |
648 | pos += src_sg[i].iov_len; | |
649 | } | |
650 | ||
651 | return j; | |
652 | } | |
653 | ||
654 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
655 | { | |
656 | size_t old_offset = offset; | |
657 | va_list ap; | |
658 | int i; | |
659 | ||
660 | va_start(ap, fmt); | |
661 | for (i = 0; fmt[i]; i++) { | |
662 | switch (fmt[i]) { | |
663 | case 'b': { | |
664 | uint8_t *valp = va_arg(ap, uint8_t *); | |
665 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
666 | break; | |
667 | } | |
668 | case 'w': { | |
669 | uint16_t val, *valp; | |
670 | valp = va_arg(ap, uint16_t *); | |
405a549a | 671 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 672 | *valp = le16_to_cpu(val); |
405a549a AL |
673 | break; |
674 | } | |
675 | case 'd': { | |
676 | uint32_t val, *valp; | |
677 | valp = va_arg(ap, uint32_t *); | |
405a549a | 678 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 679 | *valp = le32_to_cpu(val); |
405a549a AL |
680 | break; |
681 | } | |
682 | case 'q': { | |
683 | uint64_t val, *valp; | |
684 | valp = va_arg(ap, uint64_t *); | |
405a549a | 685 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 686 | *valp = le64_to_cpu(val); |
405a549a AL |
687 | break; |
688 | } | |
689 | case 'v': { | |
690 | struct iovec *iov = va_arg(ap, struct iovec *); | |
691 | int *iovcnt = va_arg(ap, int *); | |
692 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
693 | break; | |
694 | } | |
695 | case 's': { | |
696 | V9fsString *str = va_arg(ap, V9fsString *); | |
697 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
698 | /* FIXME: sanity check str->size */ | |
699 | str->data = qemu_malloc(str->size + 1); | |
700 | offset += pdu_unpack(str->data, pdu, offset, str->size); | |
701 | str->data[str->size] = 0; | |
702 | break; | |
703 | } | |
704 | case 'Q': { | |
705 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
706 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
707 | &qidp->type, &qidp->version, &qidp->path); | |
708 | break; | |
709 | } | |
710 | case 'S': { | |
711 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
712 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
713 | &statp->size, &statp->type, &statp->dev, | |
714 | &statp->qid, &statp->mode, &statp->atime, | |
715 | &statp->mtime, &statp->length, | |
716 | &statp->name, &statp->uid, &statp->gid, | |
717 | &statp->muid, &statp->extension, | |
718 | &statp->n_uid, &statp->n_gid, | |
719 | &statp->n_muid); | |
720 | break; | |
721 | } | |
c79ce737 SK |
722 | case 'I': { |
723 | V9fsIattr *iattr = va_arg(ap, V9fsIattr *); | |
724 | offset += pdu_unmarshal(pdu, offset, "ddddqqqqq", | |
725 | &iattr->valid, &iattr->mode, | |
726 | &iattr->uid, &iattr->gid, &iattr->size, | |
727 | &iattr->atime_sec, &iattr->atime_nsec, | |
728 | &iattr->mtime_sec, &iattr->mtime_nsec); | |
729 | break; | |
730 | } | |
405a549a AL |
731 | default: |
732 | break; | |
733 | } | |
734 | } | |
735 | ||
736 | va_end(ap); | |
737 | ||
738 | return offset - old_offset; | |
739 | } | |
740 | ||
741 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
742 | { | |
743 | size_t old_offset = offset; | |
744 | va_list ap; | |
745 | int i; | |
746 | ||
747 | va_start(ap, fmt); | |
748 | for (i = 0; fmt[i]; i++) { | |
749 | switch (fmt[i]) { | |
750 | case 'b': { | |
751 | uint8_t val = va_arg(ap, int); | |
752 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
753 | break; | |
754 | } | |
755 | case 'w': { | |
756 | uint16_t val; | |
757 | cpu_to_le16w(&val, va_arg(ap, int)); | |
758 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
759 | break; | |
760 | } | |
761 | case 'd': { | |
762 | uint32_t val; | |
763 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
764 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
765 | break; | |
766 | } | |
767 | case 'q': { | |
768 | uint64_t val; | |
769 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
770 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
771 | break; | |
772 | } | |
773 | case 'v': { | |
774 | struct iovec *iov = va_arg(ap, struct iovec *); | |
775 | int *iovcnt = va_arg(ap, int *); | |
776 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
777 | break; | |
778 | } | |
779 | case 's': { | |
780 | V9fsString *str = va_arg(ap, V9fsString *); | |
781 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
782 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
783 | break; | |
784 | } | |
785 | case 'Q': { | |
786 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
787 | offset += pdu_marshal(pdu, offset, "bdq", | |
788 | qidp->type, qidp->version, qidp->path); | |
789 | break; | |
790 | } | |
791 | case 'S': { | |
792 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
793 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
794 | statp->size, statp->type, statp->dev, | |
795 | &statp->qid, statp->mode, statp->atime, | |
796 | statp->mtime, statp->length, &statp->name, | |
797 | &statp->uid, &statp->gid, &statp->muid, | |
798 | &statp->extension, statp->n_uid, | |
799 | statp->n_gid, statp->n_muid); | |
800 | break; | |
801 | } | |
00ede4c2 SK |
802 | case 'A': { |
803 | V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); | |
804 | offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq", | |
805 | statp->st_result_mask, | |
806 | &statp->qid, statp->st_mode, | |
807 | statp->st_uid, statp->st_gid, | |
808 | statp->st_nlink, statp->st_rdev, | |
809 | statp->st_size, statp->st_blksize, statp->st_blocks, | |
810 | statp->st_atime_sec, statp->st_atime_nsec, | |
811 | statp->st_mtime_sec, statp->st_mtime_nsec, | |
812 | statp->st_ctime_sec, statp->st_ctime_nsec, | |
813 | statp->st_btime_sec, statp->st_btime_nsec, | |
814 | statp->st_gen, statp->st_data_version); | |
815 | break; | |
816 | } | |
405a549a AL |
817 | default: |
818 | break; | |
819 | } | |
820 | } | |
821 | va_end(ap); | |
822 | ||
823 | return offset - old_offset; | |
824 | } | |
825 | ||
826 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
827 | { | |
828 | int8_t id = pdu->id + 1; /* Response */ | |
829 | ||
830 | if (len < 0) { | |
405a549a | 831 | int err = -len; |
8f4d1ca5 | 832 | len = 7; |
405a549a | 833 | |
8f4d1ca5 AB |
834 | if (s->proto_version != V9FS_PROTO_2000L) { |
835 | V9fsString str; | |
836 | ||
837 | str.data = strerror(err); | |
838 | str.size = strlen(str.data); | |
839 | ||
840 | len += pdu_marshal(pdu, len, "s", &str); | |
841 | id = P9_RERROR; | |
842 | } | |
405a549a | 843 | |
cf03eb2c | 844 | len += pdu_marshal(pdu, len, "d", err); |
405a549a | 845 | |
8f4d1ca5 AB |
846 | if (s->proto_version == V9FS_PROTO_2000L) { |
847 | id = P9_RLERROR; | |
848 | } | |
405a549a AL |
849 | } |
850 | ||
851 | /* fill out the header */ | |
852 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
853 | ||
854 | /* keep these in sync */ | |
855 | pdu->size = len; | |
856 | pdu->id = id; | |
857 | ||
858 | /* push onto queue and notify */ | |
859 | virtqueue_push(s->vq, &pdu->elem, len); | |
860 | ||
861 | /* FIXME: we should batch these completions */ | |
862 | virtio_notify(&s->vdev, s->vq); | |
863 | ||
864 | free_pdu(s, pdu); | |
865 | } | |
866 | ||
bb9e3216 AL |
867 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
868 | { | |
869 | mode_t ret; | |
870 | ||
871 | ret = mode & 0777; | |
872 | if (mode & P9_STAT_MODE_DIR) { | |
873 | ret |= S_IFDIR; | |
874 | } | |
875 | ||
cf03eb2c AB |
876 | if (mode & P9_STAT_MODE_SYMLINK) { |
877 | ret |= S_IFLNK; | |
878 | } | |
879 | if (mode & P9_STAT_MODE_SOCKET) { | |
880 | ret |= S_IFSOCK; | |
881 | } | |
882 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
883 | ret |= S_IFIFO; | |
884 | } | |
885 | if (mode & P9_STAT_MODE_DEVICE) { | |
886 | if (extension && extension->data[0] == 'c') { | |
887 | ret |= S_IFCHR; | |
888 | } else { | |
889 | ret |= S_IFBLK; | |
bb9e3216 AL |
890 | } |
891 | } | |
892 | ||
893 | if (!(ret&~0777)) { | |
894 | ret |= S_IFREG; | |
895 | } | |
896 | ||
897 | if (mode & P9_STAT_MODE_SETUID) { | |
898 | ret |= S_ISUID; | |
899 | } | |
900 | if (mode & P9_STAT_MODE_SETGID) { | |
901 | ret |= S_ISGID; | |
902 | } | |
903 | if (mode & P9_STAT_MODE_SETVTX) { | |
904 | ret |= S_ISVTX; | |
905 | } | |
906 | ||
907 | return ret; | |
908 | } | |
909 | ||
910 | static int donttouch_stat(V9fsStat *stat) | |
911 | { | |
912 | if (stat->type == -1 && | |
913 | stat->dev == -1 && | |
914 | stat->qid.type == -1 && | |
915 | stat->qid.version == -1 && | |
916 | stat->qid.path == -1 && | |
917 | stat->mode == -1 && | |
918 | stat->atime == -1 && | |
919 | stat->mtime == -1 && | |
920 | stat->length == -1 && | |
921 | !stat->name.size && | |
922 | !stat->uid.size && | |
923 | !stat->gid.size && | |
924 | !stat->muid.size && | |
925 | stat->n_uid == -1 && | |
926 | stat->n_gid == -1 && | |
927 | stat->n_muid == -1) { | |
928 | return 1; | |
929 | } | |
930 | ||
931 | return 0; | |
932 | } | |
933 | ||
934 | static void v9fs_stat_free(V9fsStat *stat) | |
935 | { | |
936 | v9fs_string_free(&stat->name); | |
937 | v9fs_string_free(&stat->uid); | |
938 | v9fs_string_free(&stat->gid); | |
939 | v9fs_string_free(&stat->muid); | |
940 | v9fs_string_free(&stat->extension); | |
941 | } | |
942 | ||
943 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
944 | { | |
945 | uint32_t mode; | |
946 | ||
947 | mode = stbuf->st_mode & 0777; | |
948 | if (S_ISDIR(stbuf->st_mode)) { | |
949 | mode |= P9_STAT_MODE_DIR; | |
950 | } | |
951 | ||
cf03eb2c AB |
952 | if (S_ISLNK(stbuf->st_mode)) { |
953 | mode |= P9_STAT_MODE_SYMLINK; | |
954 | } | |
bb9e3216 | 955 | |
cf03eb2c AB |
956 | if (S_ISSOCK(stbuf->st_mode)) { |
957 | mode |= P9_STAT_MODE_SOCKET; | |
958 | } | |
bb9e3216 | 959 | |
cf03eb2c AB |
960 | if (S_ISFIFO(stbuf->st_mode)) { |
961 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
962 | } | |
bb9e3216 | 963 | |
cf03eb2c AB |
964 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
965 | mode |= P9_STAT_MODE_DEVICE; | |
966 | } | |
bb9e3216 | 967 | |
cf03eb2c AB |
968 | if (stbuf->st_mode & S_ISUID) { |
969 | mode |= P9_STAT_MODE_SETUID; | |
970 | } | |
bb9e3216 | 971 | |
cf03eb2c AB |
972 | if (stbuf->st_mode & S_ISGID) { |
973 | mode |= P9_STAT_MODE_SETGID; | |
974 | } | |
bb9e3216 | 975 | |
cf03eb2c AB |
976 | if (stbuf->st_mode & S_ISVTX) { |
977 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
978 | } |
979 | ||
980 | return mode; | |
981 | } | |
982 | ||
983 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
984 | const struct stat *stbuf, | |
985 | V9fsStat *v9stat) | |
986 | { | |
987 | int err; | |
988 | const char *str; | |
989 | ||
990 | memset(v9stat, 0, sizeof(*v9stat)); | |
991 | ||
992 | stat_to_qid(stbuf, &v9stat->qid); | |
993 | v9stat->mode = stat_to_v9mode(stbuf); | |
994 | v9stat->atime = stbuf->st_atime; | |
995 | v9stat->mtime = stbuf->st_mtime; | |
996 | v9stat->length = stbuf->st_size; | |
997 | ||
998 | v9fs_string_null(&v9stat->uid); | |
999 | v9fs_string_null(&v9stat->gid); | |
1000 | v9fs_string_null(&v9stat->muid); | |
1001 | ||
cf03eb2c AB |
1002 | v9stat->n_uid = stbuf->st_uid; |
1003 | v9stat->n_gid = stbuf->st_gid; | |
1004 | v9stat->n_muid = 0; | |
bb9e3216 | 1005 | |
cf03eb2c | 1006 | v9fs_string_null(&v9stat->extension); |
bb9e3216 | 1007 | |
cf03eb2c | 1008 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
7a5ca31e VJ |
1009 | err = v9fs_co_readlink(s, name, &v9stat->extension); |
1010 | if (err < 0) { | |
cf03eb2c | 1011 | return err; |
bb9e3216 | 1012 | } |
cf03eb2c AB |
1013 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1014 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
1015 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
1016 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
1017 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
1018 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
1019 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
1020 | } |
1021 | ||
1022 | str = strrchr(name->data, '/'); | |
1023 | if (str) { | |
1024 | str += 1; | |
1025 | } else { | |
1026 | str = name->data; | |
1027 | } | |
1028 | ||
1029 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
1030 | ||
1031 | v9stat->size = 61 + | |
1032 | v9fs_string_size(&v9stat->name) + | |
1033 | v9fs_string_size(&v9stat->uid) + | |
1034 | v9fs_string_size(&v9stat->gid) + | |
1035 | v9fs_string_size(&v9stat->muid) + | |
1036 | v9fs_string_size(&v9stat->extension); | |
1037 | return 0; | |
1038 | } | |
1039 | ||
00ede4c2 SK |
1040 | #define P9_STATS_MODE 0x00000001ULL |
1041 | #define P9_STATS_NLINK 0x00000002ULL | |
1042 | #define P9_STATS_UID 0x00000004ULL | |
1043 | #define P9_STATS_GID 0x00000008ULL | |
1044 | #define P9_STATS_RDEV 0x00000010ULL | |
1045 | #define P9_STATS_ATIME 0x00000020ULL | |
1046 | #define P9_STATS_MTIME 0x00000040ULL | |
1047 | #define P9_STATS_CTIME 0x00000080ULL | |
1048 | #define P9_STATS_INO 0x00000100ULL | |
1049 | #define P9_STATS_SIZE 0x00000200ULL | |
1050 | #define P9_STATS_BLOCKS 0x00000400ULL | |
1051 | ||
1052 | #define P9_STATS_BTIME 0x00000800ULL | |
1053 | #define P9_STATS_GEN 0x00001000ULL | |
1054 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
1055 | ||
1056 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
1057 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
1058 | ||
1059 | ||
1060 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, | |
8db21ce7 | 1061 | V9fsStatDotl *v9lstat) |
00ede4c2 SK |
1062 | { |
1063 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
1064 | ||
1065 | v9lstat->st_mode = stbuf->st_mode; | |
1066 | v9lstat->st_nlink = stbuf->st_nlink; | |
1067 | v9lstat->st_uid = stbuf->st_uid; | |
1068 | v9lstat->st_gid = stbuf->st_gid; | |
1069 | v9lstat->st_rdev = stbuf->st_rdev; | |
1070 | v9lstat->st_size = stbuf->st_size; | |
1071 | v9lstat->st_blksize = stbuf->st_blksize; | |
1072 | v9lstat->st_blocks = stbuf->st_blocks; | |
1073 | v9lstat->st_atime_sec = stbuf->st_atime; | |
1074 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
1075 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
1076 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
1077 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
1078 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
1079 | /* Currently we only support BASIC fields in stat */ | |
1080 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
1081 | ||
1082 | stat_to_qid(stbuf, &v9lstat->qid); | |
1083 | } | |
1084 | ||
1f5a89bf AL |
1085 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1086 | { | |
1087 | while (len && *iovcnt) { | |
1088 | if (len < sg->iov_len) { | |
1089 | sg->iov_len -= len; | |
1090 | sg->iov_base += len; | |
1091 | len = 0; | |
1092 | } else { | |
1093 | len -= sg->iov_len; | |
1094 | sg++; | |
1095 | *iovcnt -= 1; | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | return sg; | |
1100 | } | |
1101 | ||
1102 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
1103 | { | |
1104 | int i; | |
1105 | int total = 0; | |
1106 | ||
1107 | for (i = 0; i < *cnt; i++) { | |
1108 | if ((total + sg[i].iov_len) > cap) { | |
1109 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
1110 | i++; | |
1111 | break; | |
1112 | } | |
1113 | total += sg[i].iov_len; | |
1114 | } | |
1115 | ||
1116 | *cnt = i; | |
1117 | ||
1118 | return sg; | |
1119 | } | |
1120 | ||
1121 | static void print_sg(struct iovec *sg, int cnt) | |
1122 | { | |
1123 | int i; | |
1124 | ||
1125 | printf("sg[%d]: {", cnt); | |
1126 | for (i = 0; i < cnt; i++) { | |
1127 | if (i) { | |
1128 | printf(", "); | |
1129 | } | |
1130 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1131 | } | |
1132 | printf("}\n"); | |
1133 | } | |
1134 | ||
8cf89e00 AL |
1135 | static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1136 | { | |
1137 | V9fsString str; | |
1138 | v9fs_string_init(&str); | |
1139 | v9fs_string_copy(&str, dst); | |
1140 | v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len); | |
1141 | v9fs_string_free(&str); | |
1142 | } | |
1143 | ||
ff06030f | 1144 | static void v9fs_version(void *opaque) |
9f107513 | 1145 | { |
ff06030f VJJ |
1146 | V9fsPDU *pdu = opaque; |
1147 | V9fsState *s = pdu->s; | |
92c1ad03 AL |
1148 | V9fsString version; |
1149 | size_t offset = 7; | |
1150 | ||
5e94c103 | 1151 | pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); |
92c1ad03 | 1152 | |
84151514 MK |
1153 | if (!strcmp(version.data, "9P2000.u")) { |
1154 | s->proto_version = V9FS_PROTO_2000U; | |
1155 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1156 | s->proto_version = V9FS_PROTO_2000L; | |
1157 | } else { | |
92c1ad03 | 1158 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 1159 | } |
92c1ad03 | 1160 | |
5e94c103 | 1161 | offset += pdu_marshal(pdu, offset, "ds", s->msize, &version); |
92c1ad03 AL |
1162 | complete_pdu(s, pdu, offset); |
1163 | ||
1164 | v9fs_string_free(&version); | |
ff06030f | 1165 | return; |
9f107513 AL |
1166 | } |
1167 | ||
ff06030f | 1168 | static void v9fs_attach(void *opaque) |
9f107513 | 1169 | { |
ff06030f VJJ |
1170 | V9fsPDU *pdu = opaque; |
1171 | V9fsState *s = pdu->s; | |
955efc47 AL |
1172 | int32_t fid, afid, n_uname; |
1173 | V9fsString uname, aname; | |
1174 | V9fsFidState *fidp; | |
1175 | V9fsQID qid; | |
1176 | size_t offset = 7; | |
1177 | ssize_t err; | |
1178 | ||
1179 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
1180 | ||
1181 | fidp = alloc_fid(s, fid); | |
1182 | if (fidp == NULL) { | |
1183 | err = -EINVAL; | |
1184 | goto out; | |
9f107513 | 1185 | } |
955efc47 AL |
1186 | |
1187 | fidp->uid = n_uname; | |
1188 | ||
1189 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
1190 | err = fid_to_qid(s, fidp, &qid); | |
1191 | if (err) { | |
1192 | err = -EINVAL; | |
1193 | free_fid(s, fid); | |
1194 | goto out; | |
1195 | } | |
1196 | ||
1197 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
1198 | ||
1199 | err = offset; | |
1200 | out: | |
1201 | complete_pdu(s, pdu, err); | |
1202 | v9fs_string_free(&uname); | |
1203 | v9fs_string_free(&aname); | |
9f107513 AL |
1204 | } |
1205 | ||
4da7d3fa AL |
1206 | static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1207 | { | |
1208 | if (err == -1) { | |
1209 | err = -errno; | |
1210 | goto out; | |
1211 | } | |
1212 | ||
1213 | err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); | |
1214 | if (err) { | |
1215 | goto out; | |
1216 | } | |
1217 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); | |
1218 | err = vs->offset; | |
1219 | ||
1220 | out: | |
1221 | complete_pdu(s, vs->pdu, err); | |
1222 | v9fs_stat_free(&vs->v9stat); | |
1223 | qemu_free(vs); | |
1224 | } | |
1225 | ||
ff06030f | 1226 | static void v9fs_stat(void *opaque) |
9f107513 | 1227 | { |
ff06030f VJJ |
1228 | V9fsPDU *pdu = opaque; |
1229 | V9fsState *s = pdu->s; | |
4da7d3fa AL |
1230 | int32_t fid; |
1231 | V9fsStatState *vs; | |
1232 | ssize_t err = 0; | |
1233 | ||
1234 | vs = qemu_malloc(sizeof(*vs)); | |
1235 | vs->pdu = pdu; | |
1236 | vs->offset = 7; | |
1237 | ||
1238 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1239 | ||
1240 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1241 | ||
1242 | vs->fidp = lookup_fid(s, fid); | |
1243 | if (vs->fidp == NULL) { | |
1244 | err = -ENOENT; | |
1245 | goto out; | |
9f107513 | 1246 | } |
4da7d3fa AL |
1247 | |
1248 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1249 | v9fs_stat_post_lstat(s, vs, err); | |
1250 | return; | |
1251 | ||
1252 | out: | |
1253 | complete_pdu(s, vs->pdu, err); | |
1254 | v9fs_stat_free(&vs->v9stat); | |
1255 | qemu_free(vs); | |
9f107513 AL |
1256 | } |
1257 | ||
ff06030f | 1258 | static void v9fs_getattr(void *opaque) |
00ede4c2 SK |
1259 | { |
1260 | int32_t fid; | |
8db21ce7 AK |
1261 | size_t offset = 7; |
1262 | ssize_t retval = 0; | |
1263 | struct stat stbuf; | |
00ede4c2 SK |
1264 | V9fsFidState *fidp; |
1265 | uint64_t request_mask; | |
8db21ce7 AK |
1266 | V9fsStatDotl v9stat_dotl; |
1267 | V9fsPDU *pdu = opaque; | |
1268 | V9fsState *s = pdu->s; | |
00ede4c2 | 1269 | |
8db21ce7 | 1270 | pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); |
00ede4c2 SK |
1271 | |
1272 | fidp = lookup_fid(s, fid); | |
1273 | if (fidp == NULL) { | |
8db21ce7 | 1274 | retval = -ENOENT; |
00ede4c2 SK |
1275 | goto out; |
1276 | } | |
8db21ce7 AK |
1277 | /* |
1278 | * Currently we only support BASIC fields in stat, so there is no | |
00ede4c2 SK |
1279 | * need to look at request_mask. |
1280 | */ | |
8db21ce7 AK |
1281 | retval = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1282 | if (retval < 0) { | |
1283 | goto out; | |
1284 | } | |
1285 | stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); | |
1286 | retval = offset; | |
1287 | retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl); | |
00ede4c2 | 1288 | out: |
8db21ce7 | 1289 | complete_pdu(s, pdu, retval); |
00ede4c2 SK |
1290 | } |
1291 | ||
c79ce737 SK |
1292 | /* From Linux kernel code */ |
1293 | #define ATTR_MODE (1 << 0) | |
1294 | #define ATTR_UID (1 << 1) | |
1295 | #define ATTR_GID (1 << 2) | |
1296 | #define ATTR_SIZE (1 << 3) | |
1297 | #define ATTR_ATIME (1 << 4) | |
1298 | #define ATTR_MTIME (1 << 5) | |
1299 | #define ATTR_CTIME (1 << 6) | |
1300 | #define ATTR_MASK 127 | |
1301 | #define ATTR_ATIME_SET (1 << 7) | |
1302 | #define ATTR_MTIME_SET (1 << 8) | |
1303 | ||
65c05f9a | 1304 | static void v9fs_setattr(void *opaque) |
c79ce737 | 1305 | { |
65c05f9a AK |
1306 | int err = 0; |
1307 | int32_t fid; | |
1308 | V9fsFidState *fidp; | |
1309 | size_t offset = 7; | |
1310 | V9fsIattr v9iattr; | |
1311 | V9fsPDU *pdu = opaque; | |
1312 | V9fsState *s = pdu->s; | |
c79ce737 | 1313 | |
65c05f9a | 1314 | pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); |
c79ce737 | 1315 | |
65c05f9a AK |
1316 | fidp = lookup_fid(s, fid); |
1317 | if (fidp == NULL) { | |
1318 | err = -EINVAL; | |
c79ce737 SK |
1319 | goto out; |
1320 | } | |
65c05f9a AK |
1321 | if (v9iattr.valid & ATTR_MODE) { |
1322 | err = v9fs_co_chmod(s, &fidp->path, v9iattr.mode); | |
1323 | if (err < 0) { | |
1324 | goto out; | |
c79ce737 | 1325 | } |
c79ce737 | 1326 | } |
65c05f9a | 1327 | if (v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) { |
c79ce737 | 1328 | struct timespec times[2]; |
65c05f9a AK |
1329 | if (v9iattr.valid & ATTR_ATIME) { |
1330 | if (v9iattr.valid & ATTR_ATIME_SET) { | |
1331 | times[0].tv_sec = v9iattr.atime_sec; | |
1332 | times[0].tv_nsec = v9iattr.atime_nsec; | |
c79ce737 SK |
1333 | } else { |
1334 | times[0].tv_nsec = UTIME_NOW; | |
1335 | } | |
1336 | } else { | |
1337 | times[0].tv_nsec = UTIME_OMIT; | |
1338 | } | |
65c05f9a AK |
1339 | if (v9iattr.valid & ATTR_MTIME) { |
1340 | if (v9iattr.valid & ATTR_MTIME_SET) { | |
1341 | times[1].tv_sec = v9iattr.mtime_sec; | |
1342 | times[1].tv_nsec = v9iattr.mtime_nsec; | |
c79ce737 SK |
1343 | } else { |
1344 | times[1].tv_nsec = UTIME_NOW; | |
1345 | } | |
1346 | } else { | |
1347 | times[1].tv_nsec = UTIME_OMIT; | |
1348 | } | |
65c05f9a AK |
1349 | err = v9fs_co_utimensat(s, &fidp->path, times); |
1350 | if (err < 0) { | |
1351 | goto out; | |
1352 | } | |
c79ce737 | 1353 | } |
65c05f9a AK |
1354 | /* |
1355 | * If the only valid entry in iattr is ctime we can call | |
1356 | * chown(-1,-1) to update the ctime of the file | |
1357 | */ | |
1358 | if ((v9iattr.valid & (ATTR_UID | ATTR_GID)) || | |
1359 | ((v9iattr.valid & ATTR_CTIME) | |
1360 | && !((v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { | |
1361 | if (!(v9iattr.valid & ATTR_UID)) { | |
1362 | v9iattr.uid = -1; | |
1363 | } | |
1364 | if (!(v9iattr.valid & ATTR_GID)) { | |
1365 | v9iattr.gid = -1; | |
1366 | } | |
1367 | err = v9fs_co_chown(s, &fidp->path, v9iattr.uid, | |
1368 | v9iattr.gid); | |
1369 | if (err < 0) { | |
1370 | goto out; | |
1371 | } | |
c79ce737 | 1372 | } |
65c05f9a AK |
1373 | if (v9iattr.valid & (ATTR_SIZE)) { |
1374 | err = v9fs_co_truncate(s, &fidp->path, v9iattr.size); | |
1375 | if (err < 0) { | |
1376 | goto out; | |
1377 | } | |
c79ce737 | 1378 | } |
65c05f9a | 1379 | err = offset; |
c79ce737 | 1380 | out: |
65c05f9a | 1381 | complete_pdu(s, pdu, err); |
c79ce737 SK |
1382 | } |
1383 | ||
ff5e54c9 AL |
1384 | static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1385 | { | |
1386 | complete_pdu(s, vs->pdu, err); | |
1387 | ||
4f8dee2d | 1388 | if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) { |
ff5e54c9 AL |
1389 | for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1390 | v9fs_string_free(&vs->wnames[vs->name_idx]); | |
1391 | } | |
1392 | ||
1393 | qemu_free(vs->wnames); | |
1394 | qemu_free(vs->qids); | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | static void v9fs_walk_marshal(V9fsWalkState *vs) | |
1399 | { | |
1400 | int i; | |
1401 | vs->offset = 7; | |
1402 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames); | |
1403 | ||
1404 | for (i = 0; i < vs->nwnames; i++) { | |
1405 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]); | |
1406 | } | |
1407 | } | |
1408 | ||
1409 | static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1410 | int err) | |
1411 | { | |
1412 | if (err == -1) { | |
1413 | free_fid(s, vs->newfidp->fid); | |
1414 | v9fs_string_free(&vs->path); | |
1415 | err = -ENOENT; | |
1416 | goto out; | |
1417 | } | |
1418 | ||
1419 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1420 | ||
1421 | vs->name_idx++; | |
1422 | if (vs->name_idx < vs->nwnames) { | |
1423 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1424 | vs->wnames[vs->name_idx].data); | |
1425 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1426 | ||
1427 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1428 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1429 | return; | |
1430 | } | |
1431 | ||
1432 | v9fs_string_free(&vs->path); | |
1433 | v9fs_walk_marshal(vs); | |
1434 | err = vs->offset; | |
1435 | out: | |
1436 | v9fs_walk_complete(s, vs, err); | |
1437 | } | |
1438 | ||
1439 | static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1440 | int err) | |
1441 | { | |
1442 | if (err == -1) { | |
1443 | v9fs_string_free(&vs->path); | |
1444 | err = -ENOENT; | |
1445 | goto out; | |
1446 | } | |
1447 | ||
1448 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1449 | vs->name_idx++; | |
1450 | if (vs->name_idx < vs->nwnames) { | |
1451 | ||
1452 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1453 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1454 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1455 | ||
1456 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1457 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1458 | return; | |
1459 | } | |
1460 | ||
1461 | v9fs_string_free(&vs->path); | |
1462 | v9fs_walk_marshal(vs); | |
1463 | err = vs->offset; | |
1464 | out: | |
1465 | v9fs_walk_complete(s, vs, err); | |
1466 | } | |
1467 | ||
ff06030f | 1468 | static void v9fs_walk(void *opaque) |
9f107513 | 1469 | { |
ff06030f VJJ |
1470 | V9fsPDU *pdu = opaque; |
1471 | V9fsState *s = pdu->s; | |
ff5e54c9 AL |
1472 | int32_t fid, newfid; |
1473 | V9fsWalkState *vs; | |
1474 | int err = 0; | |
1475 | int i; | |
1476 | ||
1477 | vs = qemu_malloc(sizeof(*vs)); | |
1478 | vs->pdu = pdu; | |
1479 | vs->wnames = NULL; | |
1480 | vs->qids = NULL; | |
1481 | vs->offset = 7; | |
1482 | ||
1483 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid, | |
1484 | &newfid, &vs->nwnames); | |
1485 | ||
4f8dee2d | 1486 | if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) { |
ff5e54c9 AL |
1487 | vs->wnames = qemu_mallocz(sizeof(vs->wnames[0]) * vs->nwnames); |
1488 | ||
1489 | vs->qids = qemu_mallocz(sizeof(vs->qids[0]) * vs->nwnames); | |
1490 | ||
1491 | for (i = 0; i < vs->nwnames; i++) { | |
1492 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s", | |
1493 | &vs->wnames[i]); | |
1494 | } | |
4f8dee2d HPB |
1495 | } else if (vs->nwnames > P9_MAXWELEM) { |
1496 | err = -EINVAL; | |
1497 | goto out; | |
ff5e54c9 AL |
1498 | } |
1499 | ||
1500 | vs->fidp = lookup_fid(s, fid); | |
1501 | if (vs->fidp == NULL) { | |
1502 | err = -ENOENT; | |
1503 | goto out; | |
1504 | } | |
1505 | ||
1506 | /* FIXME: is this really valid? */ | |
1507 | if (fid == newfid) { | |
1508 | ||
d62dbb51 | 1509 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
ff5e54c9 AL |
1510 | v9fs_string_init(&vs->path); |
1511 | vs->name_idx = 0; | |
1512 | ||
1513 | if (vs->name_idx < vs->nwnames) { | |
1514 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1515 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1516 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1517 | ||
1518 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1519 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1520 | return; | |
1521 | } | |
1522 | } else { | |
1523 | vs->newfidp = alloc_fid(s, newfid); | |
1524 | if (vs->newfidp == NULL) { | |
1525 | err = -EINVAL; | |
1526 | goto out; | |
1527 | } | |
1528 | ||
1529 | vs->newfidp->uid = vs->fidp->uid; | |
1530 | v9fs_string_init(&vs->path); | |
1531 | vs->name_idx = 0; | |
1532 | v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); | |
1533 | ||
1534 | if (vs->name_idx < vs->nwnames) { | |
1535 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1536 | vs->wnames[vs->name_idx].data); | |
1537 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1538 | ||
1539 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1540 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1541 | return; | |
1542 | } | |
9f107513 | 1543 | } |
ff5e54c9 AL |
1544 | |
1545 | v9fs_walk_marshal(vs); | |
1546 | err = vs->offset; | |
1547 | out: | |
1548 | v9fs_walk_complete(s, vs, err); | |
9f107513 AL |
1549 | } |
1550 | ||
5e94c103 MK |
1551 | static int32_t get_iounit(V9fsState *s, V9fsString *name) |
1552 | { | |
1553 | struct statfs stbuf; | |
1554 | int32_t iounit = 0; | |
1555 | ||
1556 | /* | |
1557 | * iounit should be multiples of f_bsize (host filesystem block size | |
1558 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1559 | */ | |
1560 | if (!v9fs_do_statfs(s, name, &stbuf)) { | |
1561 | iounit = stbuf.f_bsize; | |
1562 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1563 | } | |
1564 | ||
1565 | if (!iounit) { | |
1566 | iounit = s->msize - P9_IOHDRSZ; | |
1567 | } | |
1568 | return iounit; | |
1569 | } | |
1570 | ||
a6568fe2 AL |
1571 | static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1572 | { | |
d62dbb51 | 1573 | if (vs->fidp->fs.dir == NULL) { |
a6568fe2 AL |
1574 | err = -errno; |
1575 | goto out; | |
1576 | } | |
d62dbb51 | 1577 | vs->fidp->fid_type = P9_FID_DIR; |
a6568fe2 AL |
1578 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1579 | err = vs->offset; | |
1580 | out: | |
1581 | complete_pdu(s, vs->pdu, err); | |
1582 | qemu_free(vs); | |
1583 | ||
1584 | } | |
1585 | ||
5e94c103 MK |
1586 | static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1587 | { | |
1588 | int err; | |
1589 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); | |
1590 | err = vs->offset; | |
1591 | complete_pdu(s, vs->pdu, err); | |
1592 | qemu_free(vs); | |
1593 | } | |
1594 | ||
a6568fe2 AL |
1595 | static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1596 | { | |
d62dbb51 | 1597 | if (vs->fidp->fs.fd == -1) { |
a6568fe2 AL |
1598 | err = -errno; |
1599 | goto out; | |
1600 | } | |
d62dbb51 | 1601 | vs->fidp->fid_type = P9_FID_FILE; |
5e94c103 MK |
1602 | vs->iounit = get_iounit(s, &vs->fidp->path); |
1603 | v9fs_open_post_getiounit(s, vs); | |
1604 | return; | |
a6568fe2 AL |
1605 | out: |
1606 | complete_pdu(s, vs->pdu, err); | |
1607 | qemu_free(vs); | |
1608 | } | |
1609 | ||
1610 | static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) | |
1611 | { | |
771e9d4c MK |
1612 | int flags; |
1613 | ||
a6568fe2 AL |
1614 | if (err) { |
1615 | err = -errno; | |
1616 | goto out; | |
1617 | } | |
1618 | ||
1619 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1620 | ||
1621 | if (S_ISDIR(vs->stbuf.st_mode)) { | |
d62dbb51 | 1622 | vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
a6568fe2 AL |
1623 | v9fs_open_post_opendir(s, vs, err); |
1624 | } else { | |
771e9d4c | 1625 | if (s->proto_version == V9FS_PROTO_2000L) { |
771e9d4c | 1626 | flags = vs->mode; |
630c2689 | 1627 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
0f8151cb VJJ |
1628 | /* Ignore direct disk access hint until the server supports it. */ |
1629 | flags &= ~O_DIRECT; | |
771e9d4c MK |
1630 | } else { |
1631 | flags = omode_to_uflags(vs->mode); | |
1632 | } | |
d62dbb51 | 1633 | vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
a6568fe2 AL |
1634 | v9fs_open_post_open(s, vs, err); |
1635 | } | |
1636 | return; | |
1637 | out: | |
1638 | complete_pdu(s, vs->pdu, err); | |
1639 | qemu_free(vs); | |
9f107513 AL |
1640 | } |
1641 | ||
ff06030f | 1642 | static void v9fs_open(void *opaque) |
a6568fe2 | 1643 | { |
ff06030f VJJ |
1644 | V9fsPDU *pdu = opaque; |
1645 | V9fsState *s = pdu->s; | |
a6568fe2 AL |
1646 | int32_t fid; |
1647 | V9fsOpenState *vs; | |
1648 | ssize_t err = 0; | |
1649 | ||
a6568fe2 AL |
1650 | vs = qemu_malloc(sizeof(*vs)); |
1651 | vs->pdu = pdu; | |
1652 | vs->offset = 7; | |
771e9d4c | 1653 | vs->mode = 0; |
a6568fe2 | 1654 | |
771e9d4c MK |
1655 | if (s->proto_version == V9FS_PROTO_2000L) { |
1656 | pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode); | |
1657 | } else { | |
1658 | pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode); | |
1659 | } | |
a6568fe2 AL |
1660 | |
1661 | vs->fidp = lookup_fid(s, fid); | |
1662 | if (vs->fidp == NULL) { | |
1663 | err = -ENOENT; | |
1664 | goto out; | |
1665 | } | |
1666 | ||
d62dbb51 | 1667 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
a6568fe2 AL |
1668 | |
1669 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1670 | ||
1671 | v9fs_open_post_lstat(s, vs, err); | |
1672 | return; | |
1673 | out: | |
1674 | complete_pdu(s, pdu, err); | |
1675 | qemu_free(vs); | |
1676 | } | |
1677 | ||
c1568af5 VJJ |
1678 | static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1679 | { | |
1680 | if (err == 0) { | |
1681 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
1682 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1683 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, | |
1d810aeb | 1684 | vs->iounit); |
c1568af5 VJJ |
1685 | err = vs->offset; |
1686 | } else { | |
d62dbb51 | 1687 | vs->fidp->fid_type = P9_FID_NONE; |
c1568af5 | 1688 | err = -errno; |
ab03b63d SK |
1689 | if (vs->fidp->fs.fd > 0) { |
1690 | close(vs->fidp->fs.fd); | |
1691 | } | |
c1568af5 VJJ |
1692 | } |
1693 | ||
1694 | complete_pdu(s, vs->pdu, err); | |
1695 | v9fs_string_free(&vs->name); | |
1696 | v9fs_string_free(&vs->fullname); | |
1697 | qemu_free(vs); | |
1698 | } | |
1699 | ||
1700 | static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, | |
1701 | int err) | |
1702 | { | |
1703 | if (err) { | |
1704 | err = -errno; | |
1705 | goto out; | |
1706 | } | |
1707 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1708 | ||
1709 | out: | |
1710 | v9fs_post_lcreate(s, vs, err); | |
1711 | } | |
1712 | ||
1713 | static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, | |
1714 | int err) | |
1715 | { | |
d62dbb51 | 1716 | if (vs->fidp->fs.fd == -1) { |
c1568af5 VJJ |
1717 | err = -errno; |
1718 | goto out; | |
1719 | } | |
d62dbb51 | 1720 | vs->fidp->fid_type = P9_FID_FILE; |
c1568af5 VJJ |
1721 | vs->iounit = get_iounit(s, &vs->fullname); |
1722 | v9fs_lcreate_post_get_iounit(s, vs, err); | |
1723 | return; | |
1724 | ||
1725 | out: | |
1726 | v9fs_post_lcreate(s, vs, err); | |
1727 | } | |
1728 | ||
ff06030f | 1729 | static void v9fs_lcreate(void *opaque) |
c1568af5 | 1730 | { |
ff06030f VJJ |
1731 | V9fsPDU *pdu = opaque; |
1732 | V9fsState *s = pdu->s; | |
c1568af5 VJJ |
1733 | int32_t dfid, flags, mode; |
1734 | gid_t gid; | |
1735 | V9fsLcreateState *vs; | |
1736 | ssize_t err = 0; | |
1737 | ||
1738 | vs = qemu_malloc(sizeof(*vs)); | |
1739 | vs->pdu = pdu; | |
1740 | vs->offset = 7; | |
1741 | ||
1742 | v9fs_string_init(&vs->fullname); | |
1743 | ||
1744 | pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags, | |
1745 | &mode, &gid); | |
1746 | ||
1747 | vs->fidp = lookup_fid(s, dfid); | |
1748 | if (vs->fidp == NULL) { | |
1749 | err = -ENOENT; | |
1750 | goto out; | |
1751 | } | |
1752 | ||
1753 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
1754 | vs->name.data); | |
1755 | ||
0f8151cb VJJ |
1756 | /* Ignore direct disk access hint until the server supports it. */ |
1757 | flags &= ~O_DIRECT; | |
1758 | ||
d62dbb51 | 1759 | vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
c1568af5 VJJ |
1760 | gid, flags, mode); |
1761 | v9fs_lcreate_post_do_open2(s, vs, err); | |
1762 | return; | |
1763 | ||
1764 | out: | |
1765 | complete_pdu(s, vs->pdu, err); | |
1766 | v9fs_string_free(&vs->name); | |
1767 | qemu_free(vs); | |
1768 | } | |
1769 | ||
b41e95d3 VJJ |
1770 | static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err) |
1771 | { | |
1772 | if (err == -1) { | |
1773 | err = -errno; | |
1774 | } | |
1775 | complete_pdu(s, pdu, err); | |
1776 | } | |
1777 | ||
ff06030f | 1778 | static void v9fs_fsync(void *opaque) |
b41e95d3 | 1779 | { |
ff06030f VJJ |
1780 | V9fsPDU *pdu = opaque; |
1781 | V9fsState *s = pdu->s; | |
b41e95d3 VJJ |
1782 | int32_t fid; |
1783 | size_t offset = 7; | |
1784 | V9fsFidState *fidp; | |
49594973 | 1785 | int datasync; |
b41e95d3 VJJ |
1786 | int err; |
1787 | ||
49594973 | 1788 | pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); |
b41e95d3 VJJ |
1789 | fidp = lookup_fid(s, fid); |
1790 | if (fidp == NULL) { | |
1791 | err = -ENOENT; | |
1792 | v9fs_post_do_fsync(s, pdu, err); | |
1793 | return; | |
1794 | } | |
49594973 | 1795 | err = v9fs_do_fsync(s, fidp->fs.fd, datasync); |
b41e95d3 VJJ |
1796 | v9fs_post_do_fsync(s, pdu, err); |
1797 | } | |
1798 | ||
ff06030f | 1799 | static void v9fs_clunk(void *opaque) |
a6568fe2 | 1800 | { |
ff06030f VJJ |
1801 | V9fsPDU *pdu = opaque; |
1802 | V9fsState *s = pdu->s; | |
bbd5697b AL |
1803 | int32_t fid; |
1804 | size_t offset = 7; | |
1805 | int err; | |
1806 | ||
1807 | pdu_unmarshal(pdu, offset, "d", &fid); | |
1808 | ||
1809 | err = free_fid(s, fid); | |
1810 | if (err < 0) { | |
1811 | goto out; | |
a6568fe2 | 1812 | } |
bbd5697b AL |
1813 | |
1814 | offset = 7; | |
1815 | err = offset; | |
1816 | out: | |
1817 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1818 | } |
1819 | ||
a9231555 AL |
1820 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1821 | ||
1822 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1823 | { | |
1824 | if (err) { | |
1825 | goto out; | |
1826 | } | |
a9231555 AL |
1827 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); |
1828 | vs->offset += vs->count; | |
1829 | err = vs->offset; | |
1830 | out: | |
1831 | complete_pdu(s, vs->pdu, err); | |
7a5ca31e VJ |
1832 | v9fs_stat_free(&vs->v9stat); |
1833 | v9fs_string_free(&vs->name); | |
a9231555 AL |
1834 | qemu_free(vs); |
1835 | return; | |
1836 | } | |
1837 | ||
1838 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1839 | ssize_t err) | |
1840 | { | |
1841 | if (err) { | |
1842 | err = -errno; | |
1843 | goto out; | |
1844 | } | |
1845 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1846 | if (err) { | |
1847 | goto out; | |
1848 | } | |
1849 | ||
1850 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1851 | &vs->v9stat); | |
1852 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1853 | ((vs->count + vs->len) > vs->max_count)) { | |
d62dbb51 | 1854 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1855 | v9fs_read_post_seekdir(s, vs, err); |
1856 | return; | |
1857 | } | |
1858 | vs->count += vs->len; | |
1859 | v9fs_stat_free(&vs->v9stat); | |
1860 | v9fs_string_free(&vs->name); | |
1861 | vs->dir_pos = vs->dent->d_off; | |
5e4eaa79 | 1862 | v9fs_co_readdir(s, vs->fidp, &vs->dent); |
a9231555 AL |
1863 | v9fs_read_post_readdir(s, vs, err); |
1864 | return; | |
1865 | out: | |
d62dbb51 | 1866 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1867 | v9fs_read_post_seekdir(s, vs, err); |
1868 | return; | |
1869 | ||
1870 | } | |
1871 | ||
1872 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1873 | { | |
1874 | if (vs->dent) { | |
1875 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1876 | v9fs_string_init(&vs->name); | |
1877 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1878 | vs->dent->d_name); | |
1879 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1880 | v9fs_read_post_dir_lstat(s, vs, err); | |
1881 | return; | |
1882 | } | |
1883 | ||
1884 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1885 | vs->offset += vs->count; | |
1886 | err = vs->offset; | |
1887 | complete_pdu(s, vs->pdu, err); | |
1888 | qemu_free(vs); | |
1889 | return; | |
1890 | } | |
1891 | ||
1892 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1893 | { | |
5e4eaa79 | 1894 | v9fs_co_readdir(s, vs->fidp, &vs->dent); |
a9231555 AL |
1895 | v9fs_read_post_readdir(s, vs, err); |
1896 | return; | |
1897 | } | |
1898 | ||
1899 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1900 | ssize_t err) | |
1901 | { | |
d62dbb51 | 1902 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
a9231555 AL |
1903 | v9fs_read_post_telldir(s, vs, err); |
1904 | return; | |
1905 | } | |
1906 | ||
56d15a53 | 1907 | static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
a9231555 AL |
1908 | { |
1909 | if (err < 0) { | |
1910 | /* IO error return the error */ | |
1911 | err = -errno; | |
1912 | goto out; | |
1913 | } | |
1914 | vs->total += vs->len; | |
1915 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1916 | if (vs->total < vs->count && vs->len > 0) { | |
1917 | do { | |
1918 | if (0) { | |
1919 | print_sg(vs->sg, vs->cnt); | |
1920 | } | |
56d15a53 SG |
1921 | vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
1922 | vs->off); | |
1923 | if (vs->len > 0) { | |
1924 | vs->off += vs->len; | |
1925 | } | |
a9231555 AL |
1926 | } while (vs->len == -1 && errno == EINTR); |
1927 | if (vs->len == -1) { | |
1928 | err = -errno; | |
1929 | } | |
56d15a53 | 1930 | v9fs_read_post_preadv(s, vs, err); |
a9231555 AL |
1931 | return; |
1932 | } | |
1933 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1934 | vs->offset += vs->count; | |
1935 | err = vs->offset; | |
1936 | ||
1937 | out: | |
1938 | complete_pdu(s, vs->pdu, err); | |
1939 | qemu_free(vs); | |
1940 | } | |
1941 | ||
fa32ef88 AK |
1942 | static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
1943 | { | |
1944 | ssize_t err = 0; | |
1945 | int read_count; | |
1946 | int64_t xattr_len; | |
1947 | ||
1948 | xattr_len = vs->fidp->fs.xattr.len; | |
1949 | read_count = xattr_len - vs->off; | |
1950 | if (read_count > vs->count) { | |
1951 | read_count = vs->count; | |
1952 | } else if (read_count < 0) { | |
1953 | /* | |
1954 | * read beyond XATTR value | |
1955 | */ | |
1956 | read_count = 0; | |
1957 | } | |
1958 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count); | |
1959 | vs->offset += pdu_pack(vs->pdu, vs->offset, | |
1960 | ((char *)vs->fidp->fs.xattr.value) + vs->off, | |
1961 | read_count); | |
1962 | err = vs->offset; | |
1963 | complete_pdu(s, vs->pdu, err); | |
1964 | qemu_free(vs); | |
1965 | } | |
1966 | ||
ff06030f | 1967 | static void v9fs_read(void *opaque) |
9f107513 | 1968 | { |
ff06030f VJJ |
1969 | V9fsPDU *pdu = opaque; |
1970 | V9fsState *s = pdu->s; | |
a9231555 AL |
1971 | int32_t fid; |
1972 | V9fsReadState *vs; | |
1973 | ssize_t err = 0; | |
1974 | ||
1975 | vs = qemu_malloc(sizeof(*vs)); | |
1976 | vs->pdu = pdu; | |
1977 | vs->offset = 7; | |
1978 | vs->total = 0; | |
1979 | vs->len = 0; | |
1980 | vs->count = 0; | |
1981 | ||
1982 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
1983 | ||
1984 | vs->fidp = lookup_fid(s, fid); | |
1985 | if (vs->fidp == NULL) { | |
1986 | err = -EINVAL; | |
1987 | goto out; | |
1988 | } | |
1989 | ||
fa32ef88 | 1990 | if (vs->fidp->fid_type == P9_FID_DIR) { |
a9231555 AL |
1991 | vs->max_count = vs->count; |
1992 | vs->count = 0; | |
1993 | if (vs->off == 0) { | |
d62dbb51 | 1994 | v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
a9231555 AL |
1995 | } |
1996 | v9fs_read_post_rewinddir(s, vs, err); | |
1997 | return; | |
fa32ef88 | 1998 | } else if (vs->fidp->fid_type == P9_FID_FILE) { |
a9231555 AL |
1999 | vs->sg = vs->iov; |
2000 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
56d15a53 SG |
2001 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2002 | if (vs->total <= vs->count) { | |
2003 | vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, | |
2004 | vs->off); | |
2005 | if (vs->len > 0) { | |
2006 | vs->off += vs->len; | |
2007 | } | |
2008 | err = vs->len; | |
2009 | v9fs_read_post_preadv(s, vs, err); | |
2010 | } | |
a9231555 | 2011 | return; |
fa32ef88 AK |
2012 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2013 | v9fs_xattr_read(s, vs); | |
2014 | return; | |
a9231555 AL |
2015 | } else { |
2016 | err = -EINVAL; | |
9f107513 | 2017 | } |
a9231555 AL |
2018 | out: |
2019 | complete_pdu(s, pdu, err); | |
2020 | qemu_free(vs); | |
9f107513 AL |
2021 | } |
2022 | ||
5e4eaa79 | 2023 | static size_t v9fs_readdir_data_size(V9fsString *name) |
c18e2f94 | 2024 | { |
5e4eaa79 AK |
2025 | /* |
2026 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
2027 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
2028 | */ | |
2029 | return 24 + v9fs_string_size(name); | |
c18e2f94 SK |
2030 | } |
2031 | ||
5e4eaa79 AK |
2032 | static int v9fs_do_readdir(V9fsState *s, V9fsPDU *pdu, |
2033 | V9fsFidState *fidp, int32_t max_count) | |
c18e2f94 | 2034 | { |
c18e2f94 | 2035 | size_t size; |
5e4eaa79 AK |
2036 | V9fsQID qid; |
2037 | V9fsString name; | |
2038 | int len, err = 0; | |
2039 | int32_t count = 0; | |
2040 | off_t saved_dir_pos; | |
2041 | struct dirent *dent; | |
c18e2f94 | 2042 | |
5e4eaa79 AK |
2043 | /* save the directory position */ |
2044 | saved_dir_pos = v9fs_co_telldir(s, fidp); | |
2045 | if (saved_dir_pos < 0) { | |
2046 | return saved_dir_pos; | |
2047 | } | |
2048 | while (1) { | |
2049 | err = v9fs_co_readdir(s, fidp, &dent); | |
2050 | if (err || !dent) { | |
2051 | break; | |
2052 | } | |
2053 | v9fs_string_init(&name); | |
2054 | v9fs_string_sprintf(&name, "%s", dent->d_name); | |
2055 | if ((count + v9fs_readdir_data_size(&name)) > max_count) { | |
c18e2f94 | 2056 | /* Ran out of buffer. Set dir back to old position and return */ |
5e4eaa79 AK |
2057 | v9fs_co_seekdir(s, fidp, saved_dir_pos); |
2058 | v9fs_string_free(&name); | |
2059 | return count; | |
c18e2f94 | 2060 | } |
5e4eaa79 AK |
2061 | /* |
2062 | * Fill up just the path field of qid because the client uses | |
c18e2f94 SK |
2063 | * only that. To fill the entire qid structure we will have |
2064 | * to stat each dirent found, which is expensive | |
2065 | */ | |
5e4eaa79 AK |
2066 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
2067 | memcpy(&qid.path, &dent->d_ino, size); | |
c18e2f94 | 2068 | /* Fill the other fields with dummy values */ |
5e4eaa79 AK |
2069 | qid.type = 0; |
2070 | qid.version = 0; | |
c18e2f94 | 2071 | |
5e4eaa79 AK |
2072 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
2073 | len = pdu_marshal(pdu, 11 + count, "Qqbs", | |
2074 | &qid, dent->d_off, | |
2075 | dent->d_type, &name); | |
2076 | count += len; | |
2077 | v9fs_string_free(&name); | |
2078 | saved_dir_pos = dent->d_off; | |
2079 | } | |
2080 | if (err < 0) { | |
2081 | return err; | |
2082 | } | |
2083 | return count; | |
c18e2f94 SK |
2084 | } |
2085 | ||
ff06030f | 2086 | static void v9fs_readdir(void *opaque) |
c18e2f94 SK |
2087 | { |
2088 | int32_t fid; | |
5e4eaa79 AK |
2089 | V9fsFidState *fidp; |
2090 | ssize_t retval = 0; | |
c18e2f94 | 2091 | size_t offset = 7; |
5e4eaa79 AK |
2092 | int64_t initial_offset; |
2093 | int32_t count, max_count; | |
2094 | V9fsPDU *pdu = opaque; | |
2095 | V9fsState *s = pdu->s; | |
c18e2f94 | 2096 | |
5e4eaa79 | 2097 | pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count); |
c18e2f94 | 2098 | |
5e4eaa79 AK |
2099 | fidp = lookup_fid(s, fid); |
2100 | if (fidp == NULL || !fidp->fs.dir) { | |
2101 | retval = -EINVAL; | |
c18e2f94 SK |
2102 | goto out; |
2103 | } | |
5e4eaa79 AK |
2104 | if (initial_offset == 0) { |
2105 | v9fs_co_rewinddir(s, fidp); | |
c18e2f94 | 2106 | } else { |
5e4eaa79 | 2107 | v9fs_co_seekdir(s, fidp, initial_offset); |
c18e2f94 | 2108 | } |
5e4eaa79 AK |
2109 | count = v9fs_do_readdir(s, pdu, fidp, max_count); |
2110 | if (count < 0) { | |
2111 | retval = count; | |
2112 | goto out; | |
2113 | } | |
2114 | retval = offset; | |
2115 | retval += pdu_marshal(pdu, offset, "d", count); | |
2116 | retval += count; | |
c18e2f94 | 2117 | out: |
5e4eaa79 | 2118 | complete_pdu(s, pdu, retval); |
c18e2f94 SK |
2119 | } |
2120 | ||
56d15a53 | 2121 | static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs, |
8449360c AL |
2122 | ssize_t err) |
2123 | { | |
2124 | if (err < 0) { | |
2125 | /* IO error return the error */ | |
2126 | err = -errno; | |
2127 | goto out; | |
2128 | } | |
2129 | vs->total += vs->len; | |
2130 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
2131 | if (vs->total < vs->count && vs->len > 0) { | |
2132 | do { | |
2133 | if (0) { | |
2134 | print_sg(vs->sg, vs->cnt); | |
2135 | } | |
56d15a53 SG |
2136 | vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2137 | vs->off); | |
2138 | if (vs->len > 0) { | |
2139 | vs->off += vs->len; | |
2140 | } | |
8449360c AL |
2141 | } while (vs->len == -1 && errno == EINTR); |
2142 | if (vs->len == -1) { | |
2143 | err = -errno; | |
2144 | } | |
56d15a53 | 2145 | v9fs_write_post_pwritev(s, vs, err); |
8449360c AL |
2146 | return; |
2147 | } | |
2148 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
8449360c AL |
2149 | err = vs->offset; |
2150 | out: | |
2151 | complete_pdu(s, vs->pdu, err); | |
2152 | qemu_free(vs); | |
2153 | } | |
2154 | ||
10b468bd AK |
2155 | static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
2156 | { | |
2157 | int i, to_copy; | |
2158 | ssize_t err = 0; | |
2159 | int write_count; | |
2160 | int64_t xattr_len; | |
2161 | ||
2162 | xattr_len = vs->fidp->fs.xattr.len; | |
2163 | write_count = xattr_len - vs->off; | |
2164 | if (write_count > vs->count) { | |
2165 | write_count = vs->count; | |
2166 | } else if (write_count < 0) { | |
2167 | /* | |
2168 | * write beyond XATTR value len specified in | |
2169 | * xattrcreate | |
2170 | */ | |
2171 | err = -ENOSPC; | |
2172 | goto out; | |
2173 | } | |
2174 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count); | |
2175 | err = vs->offset; | |
2176 | vs->fidp->fs.xattr.copied_len += write_count; | |
2177 | /* | |
2178 | * Now copy the content from sg list | |
2179 | */ | |
2180 | for (i = 0; i < vs->cnt; i++) { | |
2181 | if (write_count > vs->sg[i].iov_len) { | |
2182 | to_copy = vs->sg[i].iov_len; | |
2183 | } else { | |
2184 | to_copy = write_count; | |
2185 | } | |
2186 | memcpy((char *)vs->fidp->fs.xattr.value + vs->off, | |
2187 | vs->sg[i].iov_base, to_copy); | |
2188 | /* updating vs->off since we are not using below */ | |
2189 | vs->off += to_copy; | |
2190 | write_count -= to_copy; | |
2191 | } | |
2192 | out: | |
2193 | complete_pdu(s, vs->pdu, err); | |
2194 | qemu_free(vs); | |
2195 | } | |
2196 | ||
ff06030f | 2197 | static void v9fs_write(void *opaque) |
9f107513 | 2198 | { |
ff06030f VJJ |
2199 | V9fsPDU *pdu = opaque; |
2200 | V9fsState *s = pdu->s; | |
8449360c AL |
2201 | int32_t fid; |
2202 | V9fsWriteState *vs; | |
2203 | ssize_t err; | |
2204 | ||
2205 | vs = qemu_malloc(sizeof(*vs)); | |
2206 | ||
2207 | vs->pdu = pdu; | |
2208 | vs->offset = 7; | |
2209 | vs->sg = vs->iov; | |
2210 | vs->total = 0; | |
2211 | vs->len = 0; | |
2212 | ||
2213 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
10b468bd | 2214 | vs->sg, &vs->cnt); |
8449360c AL |
2215 | |
2216 | vs->fidp = lookup_fid(s, fid); | |
2217 | if (vs->fidp == NULL) { | |
2218 | err = -EINVAL; | |
2219 | goto out; | |
9f107513 | 2220 | } |
8449360c | 2221 | |
10b468bd AK |
2222 | if (vs->fidp->fid_type == P9_FID_FILE) { |
2223 | if (vs->fidp->fs.fd == -1) { | |
2224 | err = -EINVAL; | |
2225 | goto out; | |
2226 | } | |
2227 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { | |
2228 | /* | |
2229 | * setxattr operation | |
2230 | */ | |
2231 | v9fs_xattr_write(s, vs); | |
2232 | return; | |
2233 | } else { | |
8449360c AL |
2234 | err = -EINVAL; |
2235 | goto out; | |
2236 | } | |
56d15a53 SG |
2237 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2238 | if (vs->total <= vs->count) { | |
2239 | vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off); | |
2240 | if (vs->len > 0) { | |
2241 | vs->off += vs->len; | |
2242 | } | |
2243 | err = vs->len; | |
2244 | v9fs_write_post_pwritev(s, vs, err); | |
2245 | } | |
8449360c | 2246 | return; |
8449360c AL |
2247 | out: |
2248 | complete_pdu(s, vs->pdu, err); | |
2249 | qemu_free(vs); | |
9f107513 AL |
2250 | } |
2251 | ||
5e94c103 | 2252 | static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
c494dd6f | 2253 | { |
5e94c103 MK |
2254 | int err; |
2255 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
2256 | stat_to_qid(&vs->stbuf, &vs->qid); | |
c494dd6f | 2257 | |
5e94c103 MK |
2258 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); |
2259 | err = vs->offset; | |
c494dd6f | 2260 | |
5e94c103 MK |
2261 | complete_pdu(s, vs->pdu, err); |
2262 | v9fs_string_free(&vs->name); | |
2263 | v9fs_string_free(&vs->extension); | |
2264 | v9fs_string_free(&vs->fullname); | |
2265 | qemu_free(vs); | |
2266 | } | |
2267 | ||
2268 | static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) | |
2269 | { | |
2270 | if (err == 0) { | |
2271 | vs->iounit = get_iounit(s, &vs->fidp->path); | |
2272 | v9fs_create_post_getiounit(s, vs); | |
2273 | return; | |
c494dd6f AL |
2274 | } |
2275 | ||
2276 | complete_pdu(s, vs->pdu, err); | |
2277 | v9fs_string_free(&vs->name); | |
2278 | v9fs_string_free(&vs->extension); | |
2279 | v9fs_string_free(&vs->fullname); | |
2280 | qemu_free(vs); | |
2281 | } | |
2282 | ||
2283 | static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) | |
2284 | { | |
2285 | if (err) { | |
2286 | err = -errno; | |
2287 | } | |
2288 | v9fs_post_create(s, vs, err); | |
2289 | } | |
2290 | ||
2291 | static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, | |
2292 | int err) | |
2293 | { | |
d62dbb51 | 2294 | if (!vs->fidp->fs.dir) { |
c494dd6f AL |
2295 | err = -errno; |
2296 | } | |
d62dbb51 | 2297 | vs->fidp->fid_type = P9_FID_DIR; |
c494dd6f AL |
2298 | v9fs_post_create(s, vs, err); |
2299 | } | |
2300 | ||
2301 | static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, | |
2302 | int err) | |
2303 | { | |
2304 | if (err) { | |
2305 | err = -errno; | |
2306 | goto out; | |
2307 | } | |
2308 | ||
d62dbb51 | 2309 | vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
c494dd6f AL |
2310 | v9fs_create_post_opendir(s, vs, err); |
2311 | return; | |
2312 | ||
2313 | out: | |
2314 | v9fs_post_create(s, vs, err); | |
2315 | } | |
2316 | ||
2317 | static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) | |
2318 | { | |
e84861f7 | 2319 | if (err < 0) { |
c494dd6f AL |
2320 | goto out; |
2321 | } | |
2322 | ||
2323 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2324 | v9fs_create_post_dir_lstat(s, vs, err); | |
2325 | return; | |
2326 | ||
2327 | out: | |
2328 | v9fs_post_create(s, vs, err); | |
2329 | } | |
2330 | ||
c494dd6f AL |
2331 | static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2332 | { | |
2333 | if (err) { | |
d62dbb51 AK |
2334 | vs->fidp->fid_type = P9_FID_NONE; |
2335 | close(vs->fidp->fs.fd); | |
c494dd6f AL |
2336 | err = -errno; |
2337 | } | |
c494dd6f AL |
2338 | v9fs_post_create(s, vs, err); |
2339 | return; | |
2340 | } | |
2341 | ||
2342 | static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) | |
2343 | { | |
d62dbb51 | 2344 | if (vs->fidp->fs.fd == -1) { |
c494dd6f AL |
2345 | err = -errno; |
2346 | goto out; | |
2347 | } | |
d62dbb51 AK |
2348 | vs->fidp->fid_type = P9_FID_FILE; |
2349 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
c494dd6f AL |
2350 | v9fs_create_post_fstat(s, vs, err); |
2351 | ||
2352 | return; | |
2353 | ||
2354 | out: | |
2355 | v9fs_post_create(s, vs, err); | |
2356 | ||
2357 | } | |
2358 | ||
2359 | static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) | |
2360 | { | |
2361 | ||
2362 | if (err == 0 || errno != ENOENT) { | |
2363 | err = -errno; | |
2364 | goto out; | |
2365 | } | |
2366 | ||
2367 | if (vs->perm & P9_STAT_MODE_DIR) { | |
e84861f7 | 2368 | err = v9fs_co_mkdir(s, vs->fullname.data, vs->perm & 0777, |
b67592ea | 2369 | vs->fidp->uid, -1); |
c494dd6f AL |
2370 | v9fs_create_post_mkdir(s, vs, err); |
2371 | } else if (vs->perm & P9_STAT_MODE_SYMLINK) { | |
08c60fc9 VJJ |
2372 | err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2373 | vs->fullname.data, -1); | |
c494dd6f AL |
2374 | v9fs_create_post_perms(s, vs, err); |
2375 | } else if (vs->perm & P9_STAT_MODE_LINK) { | |
2376 | int32_t nfid = atoi(vs->extension.data); | |
2377 | V9fsFidState *nfidp = lookup_fid(s, nfid); | |
2378 | if (nfidp == NULL) { | |
2379 | err = -errno; | |
2380 | v9fs_post_create(s, vs, err); | |
2381 | } | |
2382 | err = v9fs_do_link(s, &nfidp->path, &vs->fullname); | |
2383 | v9fs_create_post_perms(s, vs, err); | |
2384 | } else if (vs->perm & P9_STAT_MODE_DEVICE) { | |
2385 | char ctype; | |
2386 | uint32_t major, minor; | |
2387 | mode_t nmode = 0; | |
2388 | ||
2389 | if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, | |
2390 | &minor) != 3) { | |
2391 | err = -errno; | |
2392 | v9fs_post_create(s, vs, err); | |
2393 | } | |
2394 | ||
2395 | switch (ctype) { | |
2396 | case 'c': | |
2397 | nmode = S_IFCHR; | |
2398 | break; | |
2399 | case 'b': | |
2400 | nmode = S_IFBLK; | |
2401 | break; | |
2402 | default: | |
2403 | err = -EIO; | |
2404 | v9fs_post_create(s, vs, err); | |
2405 | } | |
2406 | ||
2407 | nmode |= vs->perm & 0777; | |
5268cecc MK |
2408 | err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2409 | makedev(major, minor), vs->fidp->uid, -1); | |
c494dd6f AL |
2410 | v9fs_create_post_perms(s, vs, err); |
2411 | } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { | |
5268cecc MK |
2412 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777), |
2413 | 0, vs->fidp->uid, -1); | |
c494dd6f AL |
2414 | v9fs_post_create(s, vs, err); |
2415 | } else if (vs->perm & P9_STAT_MODE_SOCKET) { | |
5268cecc MK |
2416 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777), |
2417 | 0, vs->fidp->uid, -1); | |
63729c36 | 2418 | v9fs_post_create(s, vs, err); |
c494dd6f | 2419 | } else { |
d62dbb51 | 2420 | vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
c1568af5 VJJ |
2421 | -1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm); |
2422 | ||
c494dd6f AL |
2423 | v9fs_create_post_open2(s, vs, err); |
2424 | } | |
2425 | ||
2426 | return; | |
2427 | ||
2428 | out: | |
2429 | v9fs_post_create(s, vs, err); | |
2430 | } | |
2431 | ||
ff06030f | 2432 | static void v9fs_create(void *opaque) |
9f107513 | 2433 | { |
ff06030f VJJ |
2434 | V9fsPDU *pdu = opaque; |
2435 | V9fsState *s = pdu->s; | |
c494dd6f AL |
2436 | int32_t fid; |
2437 | V9fsCreateState *vs; | |
2438 | int err = 0; | |
2439 | ||
2440 | vs = qemu_malloc(sizeof(*vs)); | |
2441 | vs->pdu = pdu; | |
2442 | vs->offset = 7; | |
2443 | ||
2444 | v9fs_string_init(&vs->fullname); | |
2445 | ||
2446 | pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name, | |
2447 | &vs->perm, &vs->mode, &vs->extension); | |
2448 | ||
2449 | vs->fidp = lookup_fid(s, fid); | |
2450 | if (vs->fidp == NULL) { | |
2451 | err = -EINVAL; | |
2452 | goto out; | |
9f107513 | 2453 | } |
c494dd6f AL |
2454 | |
2455 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
2456 | vs->name.data); | |
2457 | ||
2458 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2459 | v9fs_create_post_lstat(s, vs, err); | |
2460 | return; | |
2461 | ||
2462 | out: | |
2463 | complete_pdu(s, vs->pdu, err); | |
2464 | v9fs_string_free(&vs->name); | |
2465 | v9fs_string_free(&vs->extension); | |
2466 | qemu_free(vs); | |
9f107513 AL |
2467 | } |
2468 | ||
08c60fc9 VJJ |
2469 | static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2470 | { | |
2471 | if (err == 0) { | |
2472 | stat_to_qid(&vs->stbuf, &vs->qid); | |
2473 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
2474 | err = vs->offset; | |
2475 | } else { | |
2476 | err = -errno; | |
2477 | } | |
2478 | complete_pdu(s, vs->pdu, err); | |
2479 | v9fs_string_free(&vs->name); | |
2480 | v9fs_string_free(&vs->symname); | |
2481 | v9fs_string_free(&vs->fullname); | |
2482 | qemu_free(vs); | |
2483 | } | |
2484 | ||
2485 | static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, | |
2486 | int err) | |
2487 | { | |
2488 | if (err) { | |
2489 | goto out; | |
2490 | } | |
2491 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2492 | out: | |
2493 | v9fs_post_symlink(s, vs, err); | |
2494 | } | |
2495 | ||
ff06030f | 2496 | static void v9fs_symlink(void *opaque) |
08c60fc9 | 2497 | { |
ff06030f VJJ |
2498 | V9fsPDU *pdu = opaque; |
2499 | V9fsState *s = pdu->s; | |
08c60fc9 VJJ |
2500 | int32_t dfid; |
2501 | V9fsSymlinkState *vs; | |
2502 | int err = 0; | |
2503 | gid_t gid; | |
2504 | ||
2505 | vs = qemu_malloc(sizeof(*vs)); | |
2506 | vs->pdu = pdu; | |
2507 | vs->offset = 7; | |
2508 | ||
2509 | v9fs_string_init(&vs->fullname); | |
2510 | ||
2511 | pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name, | |
2512 | &vs->symname, &gid); | |
2513 | ||
2514 | vs->dfidp = lookup_fid(s, dfid); | |
2515 | if (vs->dfidp == NULL) { | |
2516 | err = -EINVAL; | |
2517 | goto out; | |
2518 | } | |
2519 | ||
2520 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data, | |
2521 | vs->name.data); | |
2522 | err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, | |
2523 | vs->fullname.data, gid); | |
2524 | v9fs_symlink_post_do_symlink(s, vs, err); | |
2525 | return; | |
2526 | ||
2527 | out: | |
2528 | complete_pdu(s, vs->pdu, err); | |
2529 | v9fs_string_free(&vs->name); | |
2530 | v9fs_string_free(&vs->symname); | |
2531 | qemu_free(vs); | |
2532 | } | |
2533 | ||
ff06030f | 2534 | static void v9fs_flush(void *opaque) |
9f107513 | 2535 | { |
ff06030f VJJ |
2536 | V9fsPDU *pdu = opaque; |
2537 | V9fsState *s = pdu->s; | |
9c5e9d89 AL |
2538 | /* A nop call with no return */ |
2539 | complete_pdu(s, pdu, 7); | |
ff06030f | 2540 | return; |
9f107513 AL |
2541 | } |
2542 | ||
ff06030f | 2543 | static void v9fs_link(void *opaque) |
b2c224be | 2544 | { |
ff06030f VJJ |
2545 | V9fsPDU *pdu = opaque; |
2546 | V9fsState *s = pdu->s; | |
b2c224be VJJ |
2547 | int32_t dfid, oldfid; |
2548 | V9fsFidState *dfidp, *oldfidp; | |
2549 | V9fsString name, fullname; | |
2550 | size_t offset = 7; | |
2551 | int err = 0; | |
2552 | ||
2553 | v9fs_string_init(&fullname); | |
2554 | ||
2555 | pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2556 | ||
2557 | dfidp = lookup_fid(s, dfid); | |
2558 | if (dfidp == NULL) { | |
2559 | err = -errno; | |
2560 | goto out; | |
2561 | } | |
2562 | ||
2563 | oldfidp = lookup_fid(s, oldfid); | |
2564 | if (oldfidp == NULL) { | |
2565 | err = -errno; | |
2566 | goto out; | |
2567 | } | |
2568 | ||
2569 | v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data); | |
2570 | err = offset; | |
2571 | err = v9fs_do_link(s, &oldfidp->path, &fullname); | |
2572 | if (err) { | |
2573 | err = -errno; | |
2574 | } | |
2575 | v9fs_string_free(&fullname); | |
2576 | ||
2577 | out: | |
2578 | v9fs_string_free(&name); | |
2579 | complete_pdu(s, pdu, err); | |
2580 | } | |
2581 | ||
5bae1900 AL |
2582 | static void v9fs_remove_post_remove(V9fsState *s, V9fsRemoveState *vs, |
2583 | int err) | |
2584 | { | |
5bae1900 | 2585 | if (err < 0) { |
926487b7 SK |
2586 | err = -errno; |
2587 | } else { | |
2588 | err = vs->offset; | |
5bae1900 AL |
2589 | } |
2590 | ||
926487b7 SK |
2591 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
2592 | free_fid(s, vs->fidp->fid); | |
2593 | ||
5bae1900 AL |
2594 | complete_pdu(s, vs->pdu, err); |
2595 | qemu_free(vs); | |
2596 | } | |
2597 | ||
ff06030f | 2598 | static void v9fs_remove(void *opaque) |
9f107513 | 2599 | { |
ff06030f VJJ |
2600 | V9fsPDU *pdu = opaque; |
2601 | V9fsState *s = pdu->s; | |
5bae1900 AL |
2602 | int32_t fid; |
2603 | V9fsRemoveState *vs; | |
2604 | int err = 0; | |
2605 | ||
2606 | vs = qemu_malloc(sizeof(*vs)); | |
2607 | vs->pdu = pdu; | |
2608 | vs->offset = 7; | |
2609 | ||
2610 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
2611 | ||
2612 | vs->fidp = lookup_fid(s, fid); | |
2613 | if (vs->fidp == NULL) { | |
2614 | err = -EINVAL; | |
2615 | goto out; | |
9f107513 | 2616 | } |
5bae1900 AL |
2617 | |
2618 | err = v9fs_do_remove(s, &vs->fidp->path); | |
2619 | v9fs_remove_post_remove(s, vs, err); | |
2620 | return; | |
2621 | ||
2622 | out: | |
2623 | complete_pdu(s, pdu, err); | |
2624 | qemu_free(vs); | |
9f107513 AL |
2625 | } |
2626 | ||
8cf89e00 AL |
2627 | static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2628 | { | |
2629 | if (err < 0) { | |
2630 | goto out; | |
2631 | } | |
2632 | ||
2633 | err = vs->offset; | |
2634 | ||
2635 | out: | |
2636 | v9fs_stat_free(&vs->v9stat); | |
2637 | complete_pdu(s, vs->pdu, err); | |
2638 | qemu_free(vs); | |
2639 | } | |
2640 | ||
2641 | static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) | |
2642 | { | |
2643 | if (err < 0) { | |
2644 | goto out; | |
2645 | } | |
8cf89e00 AL |
2646 | if (vs->v9stat.length != -1) { |
2647 | if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { | |
2648 | err = -errno; | |
2649 | } | |
2650 | } | |
2651 | v9fs_wstat_post_truncate(s, vs, err); | |
2652 | return; | |
2653 | ||
2654 | out: | |
2655 | v9fs_stat_free(&vs->v9stat); | |
2656 | complete_pdu(s, vs->pdu, err); | |
2657 | qemu_free(vs); | |
2658 | } | |
2659 | ||
c7b4b0b3 | 2660 | static int v9fs_complete_rename(V9fsState *s, V9fsRenameState *vs) |
8cf89e00 | 2661 | { |
c7b4b0b3 MK |
2662 | int err = 0; |
2663 | char *old_name, *new_name; | |
2664 | char *end; | |
8cf89e00 | 2665 | |
c7b4b0b3 MK |
2666 | if (vs->newdirfid != -1) { |
2667 | V9fsFidState *dirfidp; | |
2668 | dirfidp = lookup_fid(s, vs->newdirfid); | |
2669 | ||
2670 | if (dirfidp == NULL) { | |
2671 | err = -ENOENT; | |
2672 | goto out; | |
2673 | } | |
2674 | ||
d62dbb51 | 2675 | BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
8cf89e00 | 2676 | |
c7b4b0b3 MK |
2677 | new_name = qemu_mallocz(dirfidp->path.size + vs->name.size + 2); |
2678 | ||
2679 | strcpy(new_name, dirfidp->path.data); | |
2680 | strcat(new_name, "/"); | |
2681 | strcat(new_name + dirfidp->path.size, vs->name.data); | |
2682 | } else { | |
8cf89e00 AL |
2683 | old_name = vs->fidp->path.data; |
2684 | end = strrchr(old_name, '/'); | |
2685 | if (end) { | |
2686 | end++; | |
2687 | } else { | |
2688 | end = old_name; | |
2689 | } | |
c7b4b0b3 | 2690 | new_name = qemu_mallocz(end - old_name + vs->name.size + 1); |
8cf89e00 | 2691 | |
c7b4b0b3 MK |
2692 | strncat(new_name, old_name, end - old_name); |
2693 | strncat(new_name + (end - old_name), vs->name.data, vs->name.size); | |
2694 | } | |
8cf89e00 | 2695 | |
c7b4b0b3 MK |
2696 | v9fs_string_free(&vs->name); |
2697 | vs->name.data = qemu_strdup(new_name); | |
2698 | vs->name.size = strlen(new_name); | |
8cf89e00 | 2699 | |
c7b4b0b3 MK |
2700 | if (strcmp(new_name, vs->fidp->path.data) != 0) { |
2701 | if (v9fs_do_rename(s, &vs->fidp->path, &vs->name)) { | |
2702 | err = -errno; | |
2703 | } else { | |
2704 | V9fsFidState *fidp; | |
2705 | /* | |
2706 | * Fixup fid's pointing to the old name to | |
2707 | * start pointing to the new name | |
2708 | */ | |
2709 | for (fidp = s->fid_list; fidp; fidp = fidp->next) { | |
2710 | if (vs->fidp == fidp) { | |
2711 | /* | |
936532a4 MN |
2712 | * we replace name of this fid towards the end so |
2713 | * that our below v9fs_path_is_ancestor check will | |
2714 | * work | |
c7b4b0b3 MK |
2715 | */ |
2716 | continue; | |
2717 | } | |
936532a4 | 2718 | if (v9fs_path_is_ancestor(&vs->fidp->path, &fidp->path)) { |
c7b4b0b3 MK |
2719 | /* replace the name */ |
2720 | v9fs_fix_path(&fidp->path, &vs->name, | |
2721 | strlen(vs->fidp->path.data)); | |
8cf89e00 | 2722 | } |
8cf89e00 | 2723 | } |
c7b4b0b3 | 2724 | v9fs_string_copy(&vs->fidp->path, &vs->name); |
8cf89e00 AL |
2725 | } |
2726 | } | |
c7b4b0b3 MK |
2727 | out: |
2728 | v9fs_string_free(&vs->name); | |
2729 | return err; | |
2730 | } | |
2731 | ||
2732 | static void v9fs_rename_post_rename(V9fsState *s, V9fsRenameState *vs, int err) | |
2733 | { | |
2734 | complete_pdu(s, vs->pdu, err); | |
2735 | qemu_free(vs); | |
2736 | } | |
2737 | ||
2738 | static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) | |
2739 | { | |
2740 | if (err < 0) { | |
2741 | goto out; | |
2742 | } | |
2743 | ||
2744 | if (vs->v9stat.name.size != 0) { | |
2745 | V9fsRenameState *vr; | |
2746 | ||
783f04e1 | 2747 | vr = qemu_mallocz(sizeof(V9fsRenameState)); |
c7b4b0b3 MK |
2748 | vr->newdirfid = -1; |
2749 | vr->pdu = vs->pdu; | |
2750 | vr->fidp = vs->fidp; | |
2751 | vr->offset = vs->offset; | |
2752 | vr->name.size = vs->v9stat.name.size; | |
2753 | vr->name.data = qemu_strdup(vs->v9stat.name.data); | |
2754 | ||
2755 | err = v9fs_complete_rename(s, vr); | |
2756 | qemu_free(vr); | |
2757 | } | |
8cf89e00 AL |
2758 | v9fs_wstat_post_rename(s, vs, err); |
2759 | return; | |
2760 | ||
2761 | out: | |
2762 | v9fs_stat_free(&vs->v9stat); | |
2763 | complete_pdu(s, vs->pdu, err); | |
2764 | qemu_free(vs); | |
2765 | } | |
2766 | ||
ff06030f | 2767 | static void v9fs_rename(void *opaque) |
c7b4b0b3 | 2768 | { |
ff06030f VJJ |
2769 | V9fsPDU *pdu = opaque; |
2770 | V9fsState *s = pdu->s; | |
c7b4b0b3 MK |
2771 | int32_t fid; |
2772 | V9fsRenameState *vs; | |
2773 | ssize_t err = 0; | |
2774 | ||
2775 | vs = qemu_malloc(sizeof(*vs)); | |
2776 | vs->pdu = pdu; | |
2777 | vs->offset = 7; | |
2778 | ||
2779 | pdu_unmarshal(vs->pdu, vs->offset, "dds", &fid, &vs->newdirfid, &vs->name); | |
2780 | ||
2781 | vs->fidp = lookup_fid(s, fid); | |
2782 | if (vs->fidp == NULL) { | |
2783 | err = -ENOENT; | |
2784 | goto out; | |
2785 | } | |
2786 | ||
d62dbb51 | 2787 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
c7b4b0b3 MK |
2788 | |
2789 | err = v9fs_complete_rename(s, vs); | |
2790 | v9fs_rename_post_rename(s, vs, err); | |
2791 | return; | |
2792 | out: | |
2793 | complete_pdu(s, vs->pdu, err); | |
2794 | qemu_free(vs); | |
2795 | } | |
2796 | ||
8cf89e00 AL |
2797 | static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2798 | { | |
2799 | if (err < 0) { | |
2800 | goto out; | |
2801 | } | |
2802 | ||
f7613bee | 2803 | if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
8cf89e00 AL |
2804 | if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid, |
2805 | vs->v9stat.n_gid)) { | |
2806 | err = -errno; | |
2807 | } | |
2808 | } | |
2809 | v9fs_wstat_post_chown(s, vs, err); | |
2810 | return; | |
2811 | ||
2812 | out: | |
2813 | v9fs_stat_free(&vs->v9stat); | |
2814 | complete_pdu(s, vs->pdu, err); | |
2815 | qemu_free(vs); | |
2816 | } | |
2817 | ||
2818 | static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) | |
2819 | { | |
2820 | if (err < 0) { | |
2821 | goto out; | |
2822 | } | |
2823 | ||
74bc02b2 | 2824 | if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
8fc39ae4 SK |
2825 | struct timespec times[2]; |
2826 | if (vs->v9stat.atime != -1) { | |
2827 | times[0].tv_sec = vs->v9stat.atime; | |
2828 | times[0].tv_nsec = 0; | |
2829 | } else { | |
2830 | times[0].tv_nsec = UTIME_OMIT; | |
2831 | } | |
2832 | if (vs->v9stat.mtime != -1) { | |
2833 | times[1].tv_sec = vs->v9stat.mtime; | |
2834 | times[1].tv_nsec = 0; | |
2835 | } else { | |
2836 | times[1].tv_nsec = UTIME_OMIT; | |
2837 | } | |
2838 | ||
2839 | if (v9fs_do_utimensat(s, &vs->fidp->path, times)) { | |
8cf89e00 AL |
2840 | err = -errno; |
2841 | } | |
2842 | } | |
2843 | ||
2844 | v9fs_wstat_post_utime(s, vs, err); | |
2845 | return; | |
2846 | ||
2847 | out: | |
2848 | v9fs_stat_free(&vs->v9stat); | |
2849 | complete_pdu(s, vs->pdu, err); | |
2850 | qemu_free(vs); | |
2851 | } | |
2852 | ||
2853 | static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) | |
2854 | { | |
2855 | if (err == -1) { | |
2856 | err = -errno; | |
2857 | } | |
2858 | v9fs_stat_free(&vs->v9stat); | |
2859 | complete_pdu(s, vs->pdu, err); | |
2860 | qemu_free(vs); | |
2861 | } | |
2862 | ||
2863 | static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) | |
2864 | { | |
2865 | uint32_t v9_mode; | |
2866 | ||
2867 | if (err == -1) { | |
2868 | err = -errno; | |
2869 | goto out; | |
2870 | } | |
2871 | ||
2872 | v9_mode = stat_to_v9mode(&vs->stbuf); | |
2873 | ||
2874 | if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2875 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2876 | /* Attempting to change the type */ | |
2877 | err = -EIO; | |
2878 | goto out; | |
2879 | } | |
2880 | ||
2881 | if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode, | |
2882 | &vs->v9stat.extension))) { | |
2883 | err = -errno; | |
2884 | } | |
2885 | v9fs_wstat_post_chmod(s, vs, err); | |
2886 | return; | |
2887 | ||
2888 | out: | |
2889 | v9fs_stat_free(&vs->v9stat); | |
2890 | complete_pdu(s, vs->pdu, err); | |
2891 | qemu_free(vs); | |
2892 | } | |
2893 | ||
ff06030f | 2894 | static void v9fs_wstat(void *opaque) |
9f107513 | 2895 | { |
ff06030f VJJ |
2896 | V9fsPDU *pdu = opaque; |
2897 | V9fsState *s = pdu->s; | |
8cf89e00 AL |
2898 | int32_t fid; |
2899 | V9fsWstatState *vs; | |
2900 | int err = 0; | |
2901 | ||
2902 | vs = qemu_malloc(sizeof(*vs)); | |
2903 | vs->pdu = pdu; | |
2904 | vs->offset = 7; | |
2905 | ||
2906 | pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat); | |
2907 | ||
2908 | vs->fidp = lookup_fid(s, fid); | |
2909 | if (vs->fidp == NULL) { | |
2910 | err = -EINVAL; | |
2911 | goto out; | |
9f107513 | 2912 | } |
8cf89e00 AL |
2913 | |
2914 | /* do we need to sync the file? */ | |
2915 | if (donttouch_stat(&vs->v9stat)) { | |
49594973 | 2916 | err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0); |
8cf89e00 AL |
2917 | v9fs_wstat_post_fsync(s, vs, err); |
2918 | return; | |
2919 | } | |
2920 | ||
2921 | if (vs->v9stat.mode != -1) { | |
2922 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
2923 | v9fs_wstat_post_lstat(s, vs, err); | |
2924 | return; | |
2925 | } | |
2926 | ||
2927 | v9fs_wstat_post_chmod(s, vs, err); | |
2928 | return; | |
2929 | ||
2930 | out: | |
2931 | v9fs_stat_free(&vs->v9stat); | |
2932 | complete_pdu(s, vs->pdu, err); | |
2933 | qemu_free(vs); | |
9f107513 AL |
2934 | } |
2935 | ||
88a4763e AK |
2936 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2937 | { | |
2938 | uint32_t f_type; | |
2939 | uint32_t f_bsize; | |
2940 | uint64_t f_blocks; | |
2941 | uint64_t f_bfree; | |
2942 | uint64_t f_bavail; | |
2943 | uint64_t f_files; | |
2944 | uint64_t f_ffree; | |
2945 | uint64_t fsid_val; | |
2946 | uint32_t f_namelen; | |
2947 | size_t offset = 7; | |
5e94c103 MK |
2948 | int32_t bsize_factor; |
2949 | ||
5e94c103 MK |
2950 | /* |
2951 | * compute bsize factor based on host file system block size | |
2952 | * and client msize | |
2953 | */ | |
88a4763e | 2954 | bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
5e94c103 MK |
2955 | if (!bsize_factor) { |
2956 | bsize_factor = 1; | |
2957 | } | |
88a4763e AK |
2958 | f_type = stbuf->f_type; |
2959 | f_bsize = stbuf->f_bsize; | |
2960 | f_bsize *= bsize_factor; | |
5e94c103 MK |
2961 | /* |
2962 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
2963 | * adjust(divide) the number of blocks, free blocks and available | |
2964 | * blocks by bsize factor | |
2965 | */ | |
88a4763e AK |
2966 | f_blocks = stbuf->f_blocks/bsize_factor; |
2967 | f_bfree = stbuf->f_bfree/bsize_factor; | |
2968 | f_bavail = stbuf->f_bavail/bsize_factor; | |
2969 | f_files = stbuf->f_files; | |
2970 | f_ffree = stbuf->f_ffree; | |
2971 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | | |
2972 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; | |
2973 | f_namelen = stbuf->f_namelen; | |
be940c87 | 2974 | |
88a4763e AK |
2975 | return pdu_marshal(pdu, offset, "ddqqqqqqd", |
2976 | f_type, f_bsize, f_blocks, f_bfree, | |
2977 | f_bavail, f_files, f_ffree, | |
2978 | fsid_val, f_namelen); | |
be940c87 MK |
2979 | } |
2980 | ||
ff06030f | 2981 | static void v9fs_statfs(void *opaque) |
be940c87 | 2982 | { |
88a4763e AK |
2983 | int32_t fid; |
2984 | ssize_t retval = 0; | |
2985 | size_t offset = 7; | |
2986 | V9fsFidState *fidp; | |
2987 | struct statfs stbuf; | |
ff06030f VJJ |
2988 | V9fsPDU *pdu = opaque; |
2989 | V9fsState *s = pdu->s; | |
be940c87 | 2990 | |
88a4763e AK |
2991 | pdu_unmarshal(pdu, offset, "d", &fid); |
2992 | fidp = lookup_fid(s, fid); | |
2993 | if (fidp == NULL) { | |
2994 | retval = -ENOENT; | |
be940c87 MK |
2995 | goto out; |
2996 | } | |
88a4763e AK |
2997 | retval = v9fs_co_statfs(s, &fidp->path, &stbuf); |
2998 | if (retval < 0) { | |
2999 | goto out; | |
3000 | } | |
3001 | retval = offset; | |
3002 | retval += v9fs_fill_statfs(s, pdu, &stbuf); | |
be940c87 | 3003 | out: |
88a4763e | 3004 | complete_pdu(s, pdu, retval); |
ff06030f | 3005 | return; |
be940c87 MK |
3006 | } |
3007 | ||
ff06030f | 3008 | static void v9fs_mknod(void *opaque) |
5268cecc | 3009 | { |
1b733fed AK |
3010 | |
3011 | int mode; | |
3012 | gid_t gid; | |
5268cecc | 3013 | int32_t fid; |
1b733fed | 3014 | V9fsQID qid; |
5268cecc | 3015 | int err = 0; |
5268cecc | 3016 | int major, minor; |
1b733fed AK |
3017 | size_t offset = 7; |
3018 | V9fsString name; | |
3019 | struct stat stbuf; | |
3020 | V9fsString fullname; | |
3021 | V9fsFidState *fidp; | |
3022 | V9fsPDU *pdu = opaque; | |
3023 | V9fsState *s = pdu->s; | |
5268cecc | 3024 | |
1b733fed AK |
3025 | v9fs_string_init(&fullname); |
3026 | pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, | |
3027 | &major, &minor, &gid); | |
5268cecc MK |
3028 | |
3029 | fidp = lookup_fid(s, fid); | |
3030 | if (fidp == NULL) { | |
3031 | err = -ENOENT; | |
3032 | goto out; | |
3033 | } | |
1b733fed AK |
3034 | v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); |
3035 | err = v9fs_co_mknod(s, &fullname, fidp->uid, gid, | |
3036 | makedev(major, minor), mode); | |
3037 | if (err < 0) { | |
3038 | goto out; | |
3039 | } | |
3040 | err = v9fs_co_lstat(s, &fullname, &stbuf); | |
3041 | if (err < 0) { | |
3042 | goto out; | |
3043 | } | |
3044 | stat_to_qid(&stbuf, &qid); | |
3045 | err = offset; | |
3046 | err += pdu_marshal(pdu, offset, "Q", &qid); | |
5268cecc | 3047 | out: |
1b733fed AK |
3048 | complete_pdu(s, pdu, err); |
3049 | v9fs_string_free(&fullname); | |
3050 | v9fs_string_free(&name); | |
5268cecc MK |
3051 | } |
3052 | ||
82cc3ee8 MK |
3053 | /* |
3054 | * Implement posix byte range locking code | |
3055 | * Server side handling of locking code is very simple, because 9p server in | |
3056 | * QEMU can handle only one client. And most of the lock handling | |
3057 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to | |
3058 | * do any thing in * qemu 9p server side lock code path. | |
3059 | * So when a TLOCK request comes, always return success | |
3060 | */ | |
3061 | ||
ff06030f | 3062 | static void v9fs_lock(void *opaque) |
82cc3ee8 | 3063 | { |
ff06030f VJJ |
3064 | V9fsPDU *pdu = opaque; |
3065 | V9fsState *s = pdu->s; | |
82cc3ee8 MK |
3066 | int32_t fid, err = 0; |
3067 | V9fsLockState *vs; | |
3068 | ||
3069 | vs = qemu_mallocz(sizeof(*vs)); | |
3070 | vs->pdu = pdu; | |
3071 | vs->offset = 7; | |
3072 | ||
3073 | vs->flock = qemu_malloc(sizeof(*vs->flock)); | |
3074 | pdu_unmarshal(vs->pdu, vs->offset, "dbdqqds", &fid, &vs->flock->type, | |
3075 | &vs->flock->flags, &vs->flock->start, &vs->flock->length, | |
3076 | &vs->flock->proc_id, &vs->flock->client_id); | |
3077 | ||
3078 | vs->status = P9_LOCK_ERROR; | |
3079 | ||
3080 | /* We support only block flag now (that too ignored currently) */ | |
3081 | if (vs->flock->flags & ~P9_LOCK_FLAGS_BLOCK) { | |
3082 | err = -EINVAL; | |
3083 | goto out; | |
3084 | } | |
3085 | vs->fidp = lookup_fid(s, fid); | |
3086 | if (vs->fidp == NULL) { | |
3087 | err = -ENOENT; | |
3088 | goto out; | |
3089 | } | |
3090 | ||
3091 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
3092 | if (err < 0) { | |
3093 | err = -errno; | |
3094 | goto out; | |
3095 | } | |
3096 | vs->status = P9_LOCK_SUCCESS; | |
3097 | out: | |
3098 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "b", vs->status); | |
3099 | complete_pdu(s, vs->pdu, err); | |
3100 | qemu_free(vs->flock); | |
3101 | qemu_free(vs); | |
3102 | } | |
3103 | ||
8f354003 MK |
3104 | /* |
3105 | * When a TGETLOCK request comes, always return success because all lock | |
3106 | * handling is done by client's VFS layer. | |
3107 | */ | |
3108 | ||
ff06030f | 3109 | static void v9fs_getlock(void *opaque) |
8f354003 | 3110 | { |
ff06030f VJJ |
3111 | V9fsPDU *pdu = opaque; |
3112 | V9fsState *s = pdu->s; | |
8f354003 MK |
3113 | int32_t fid, err = 0; |
3114 | V9fsGetlockState *vs; | |
3115 | ||
3116 | vs = qemu_mallocz(sizeof(*vs)); | |
3117 | vs->pdu = pdu; | |
3118 | vs->offset = 7; | |
3119 | ||
3120 | vs->glock = qemu_malloc(sizeof(*vs->glock)); | |
3121 | pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type, | |
3122 | &vs->glock->start, &vs->glock->length, &vs->glock->proc_id, | |
3123 | &vs->glock->client_id); | |
3124 | ||
3125 | vs->fidp = lookup_fid(s, fid); | |
3126 | if (vs->fidp == NULL) { | |
3127 | err = -ENOENT; | |
3128 | goto out; | |
3129 | } | |
3130 | ||
3131 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
3132 | if (err < 0) { | |
3133 | err = -errno; | |
3134 | goto out; | |
3135 | } | |
3136 | vs->glock->type = F_UNLCK; | |
3137 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type, | |
3138 | vs->glock->start, vs->glock->length, vs->glock->proc_id, | |
3139 | &vs->glock->client_id); | |
3140 | out: | |
3141 | complete_pdu(s, vs->pdu, err); | |
3142 | qemu_free(vs->glock); | |
3143 | qemu_free(vs); | |
3144 | } | |
3145 | ||
ff06030f | 3146 | static void v9fs_mkdir(void *opaque) |
b67592ea | 3147 | { |
ff06030f | 3148 | V9fsPDU *pdu = opaque; |
e84861f7 | 3149 | size_t offset = 7; |
b67592ea | 3150 | int32_t fid; |
e84861f7 VJ |
3151 | struct stat stbuf; |
3152 | V9fsString name, fullname; | |
3153 | V9fsQID qid; | |
b67592ea MK |
3154 | V9fsFidState *fidp; |
3155 | gid_t gid; | |
3156 | int mode; | |
e84861f7 | 3157 | int err = 0; |
b67592ea | 3158 | |
e84861f7 VJ |
3159 | v9fs_string_init(&fullname); |
3160 | pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); | |
b67592ea | 3161 | |
e84861f7 | 3162 | fidp = lookup_fid(pdu->s, fid); |
b67592ea MK |
3163 | if (fidp == NULL) { |
3164 | err = -ENOENT; | |
3165 | goto out; | |
3166 | } | |
e84861f7 VJ |
3167 | v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); |
3168 | err = v9fs_co_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid); | |
3169 | if (err < 0) { | |
3170 | goto out; | |
3171 | } | |
3172 | err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); | |
3173 | if (err < 0) { | |
3174 | goto out; | |
3175 | } | |
3176 | stat_to_qid(&stbuf, &qid); | |
3177 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
3178 | err = offset; | |
b67592ea | 3179 | out: |
e84861f7 VJ |
3180 | complete_pdu(pdu->s, pdu, err); |
3181 | v9fs_string_free(&fullname); | |
3182 | v9fs_string_free(&name); | |
b67592ea MK |
3183 | } |
3184 | ||
ff06030f | 3185 | static void v9fs_xattrwalk(void *opaque) |
fa32ef88 | 3186 | { |
670185a6 AK |
3187 | int64_t size; |
3188 | V9fsString name; | |
fa32ef88 | 3189 | ssize_t err = 0; |
670185a6 | 3190 | size_t offset = 7; |
fa32ef88 | 3191 | int32_t fid, newfid; |
670185a6 AK |
3192 | V9fsFidState *file_fidp; |
3193 | V9fsFidState *xattr_fidp; | |
3194 | V9fsPDU *pdu = opaque; | |
3195 | V9fsState *s = pdu->s; | |
fa32ef88 | 3196 | |
670185a6 AK |
3197 | pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); |
3198 | file_fidp = lookup_fid(s, fid); | |
3199 | if (file_fidp == NULL) { | |
fa32ef88 AK |
3200 | err = -ENOENT; |
3201 | goto out; | |
3202 | } | |
670185a6 AK |
3203 | xattr_fidp = alloc_fid(s, newfid); |
3204 | if (xattr_fidp == NULL) { | |
fa32ef88 AK |
3205 | err = -EINVAL; |
3206 | goto out; | |
3207 | } | |
670185a6 AK |
3208 | v9fs_string_copy(&xattr_fidp->path, &file_fidp->path); |
3209 | if (name.data[0] == 0) { | |
fa32ef88 AK |
3210 | /* |
3211 | * listxattr request. Get the size first | |
3212 | */ | |
670185a6 AK |
3213 | size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0); |
3214 | if (size < 0) { | |
3215 | err = size; | |
3216 | free_fid(s, xattr_fidp->fid); | |
3217 | goto out; | |
fa32ef88 | 3218 | } |
670185a6 AK |
3219 | /* |
3220 | * Read the xattr value | |
3221 | */ | |
3222 | xattr_fidp->fs.xattr.len = size; | |
3223 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3224 | xattr_fidp->fs.xattr.copied_len = -1; | |
3225 | if (size) { | |
3226 | xattr_fidp->fs.xattr.value = qemu_malloc(size); | |
3227 | err = v9fs_co_llistxattr(s, &xattr_fidp->path, | |
3228 | xattr_fidp->fs.xattr.value, | |
3229 | xattr_fidp->fs.xattr.len); | |
3230 | if (err < 0) { | |
3231 | free_fid(s, xattr_fidp->fid); | |
3232 | goto out; | |
3233 | } | |
3234 | } | |
3235 | offset += pdu_marshal(pdu, offset, "q", size); | |
3236 | err = offset; | |
fa32ef88 AK |
3237 | } else { |
3238 | /* | |
3239 | * specific xattr fid. We check for xattr | |
3240 | * presence also collect the xattr size | |
3241 | */ | |
670185a6 AK |
3242 | size = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
3243 | &name, NULL, 0); | |
3244 | if (size < 0) { | |
3245 | err = size; | |
3246 | free_fid(s, xattr_fidp->fid); | |
3247 | goto out; | |
fa32ef88 | 3248 | } |
670185a6 AK |
3249 | /* |
3250 | * Read the xattr value | |
3251 | */ | |
3252 | xattr_fidp->fs.xattr.len = size; | |
3253 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3254 | xattr_fidp->fs.xattr.copied_len = -1; | |
3255 | if (size) { | |
3256 | xattr_fidp->fs.xattr.value = qemu_malloc(size); | |
3257 | err = v9fs_co_lgetxattr(s, &xattr_fidp->path, | |
3258 | &name, xattr_fidp->fs.xattr.value, | |
3259 | xattr_fidp->fs.xattr.len); | |
3260 | if (err < 0) { | |
3261 | free_fid(s, xattr_fidp->fid); | |
3262 | goto out; | |
3263 | } | |
3264 | } | |
3265 | offset += pdu_marshal(pdu, offset, "q", size); | |
3266 | err = offset; | |
fa32ef88 AK |
3267 | } |
3268 | out: | |
670185a6 AK |
3269 | complete_pdu(s, pdu, err); |
3270 | v9fs_string_free(&name); | |
fa32ef88 AK |
3271 | } |
3272 | ||
ff06030f | 3273 | static void v9fs_xattrcreate(void *opaque) |
10b468bd AK |
3274 | { |
3275 | int flags; | |
3276 | int32_t fid; | |
f10ff58d | 3277 | int64_t size; |
10b468bd | 3278 | ssize_t err = 0; |
f10ff58d AK |
3279 | V9fsString name; |
3280 | size_t offset = 7; | |
3281 | V9fsFidState *file_fidp; | |
3282 | V9fsFidState *xattr_fidp; | |
3283 | V9fsPDU *pdu = opaque; | |
3284 | V9fsState *s = pdu->s; | |
10b468bd | 3285 | |
f10ff58d AK |
3286 | pdu_unmarshal(pdu, offset, "dsqd", |
3287 | &fid, &name, &size, &flags); | |
10b468bd | 3288 | |
f10ff58d AK |
3289 | file_fidp = lookup_fid(s, fid); |
3290 | if (file_fidp == NULL) { | |
10b468bd AK |
3291 | err = -EINVAL; |
3292 | goto out; | |
3293 | } | |
10b468bd | 3294 | /* Make the file fid point to xattr */ |
f10ff58d AK |
3295 | xattr_fidp = file_fidp; |
3296 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3297 | xattr_fidp->fs.xattr.copied_len = 0; | |
3298 | xattr_fidp->fs.xattr.len = size; | |
3299 | xattr_fidp->fs.xattr.flags = flags; | |
3300 | v9fs_string_init(&xattr_fidp->fs.xattr.name); | |
3301 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); | |
3302 | if (size) { | |
3303 | xattr_fidp->fs.xattr.value = qemu_malloc(size); | |
3304 | } else { | |
3305 | xattr_fidp->fs.xattr.value = NULL; | |
3306 | } | |
3307 | err = offset; | |
10b468bd | 3308 | out: |
f10ff58d AK |
3309 | complete_pdu(s, pdu, err); |
3310 | v9fs_string_free(&name); | |
10b468bd | 3311 | } |
fa32ef88 | 3312 | |
ff06030f | 3313 | static void v9fs_readlink(void *opaque) |
df0973a4 | 3314 | { |
ff06030f | 3315 | V9fsPDU *pdu = opaque; |
7a5ca31e VJ |
3316 | size_t offset = 7; |
3317 | V9fsString target; | |
df0973a4 | 3318 | int32_t fid; |
df0973a4 MK |
3319 | int err = 0; |
3320 | V9fsFidState *fidp; | |
3321 | ||
7a5ca31e VJ |
3322 | pdu_unmarshal(pdu, offset, "d", &fid); |
3323 | fidp = lookup_fid(pdu->s, fid); | |
df0973a4 MK |
3324 | if (fidp == NULL) { |
3325 | err = -ENOENT; | |
3326 | goto out; | |
3327 | } | |
3328 | ||
7a5ca31e VJ |
3329 | v9fs_string_init(&target); |
3330 | err = v9fs_co_readlink(pdu->s, &fidp->path, &target); | |
3331 | if (err < 0) { | |
3332 | goto out; | |
3333 | } | |
3334 | offset += pdu_marshal(pdu, offset, "s", &target); | |
3335 | err = offset; | |
3336 | v9fs_string_free(&target); | |
df0973a4 | 3337 | out: |
7a5ca31e | 3338 | complete_pdu(pdu->s, pdu, err); |
df0973a4 MK |
3339 | } |
3340 | ||
ff06030f | 3341 | static CoroutineEntry *pdu_co_handlers[] = { |
c18e2f94 | 3342 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3343 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3344 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3345 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 3346 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 3347 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 3348 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 3349 | [P9_TRENAME] = v9fs_rename, |
82cc3ee8 | 3350 | [P9_TLOCK] = v9fs_lock, |
8f354003 | 3351 | [P9_TGETLOCK] = v9fs_getlock, |
df0973a4 | 3352 | [P9_TREADLINK] = v9fs_readlink, |
b67592ea | 3353 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 3354 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 3355 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
3356 | [P9_TATTACH] = v9fs_attach, |
3357 | [P9_TSTAT] = v9fs_stat, | |
3358 | [P9_TWALK] = v9fs_walk, | |
3359 | [P9_TCLUNK] = v9fs_clunk, | |
b41e95d3 | 3360 | [P9_TFSYNC] = v9fs_fsync, |
9f107513 AL |
3361 | [P9_TOPEN] = v9fs_open, |
3362 | [P9_TREAD] = v9fs_read, | |
3363 | #if 0 | |
3364 | [P9_TAUTH] = v9fs_auth, | |
3365 | #endif | |
3366 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3367 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3368 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3369 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3370 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3371 | [P9_TWRITE] = v9fs_write, |
3372 | [P9_TWSTAT] = v9fs_wstat, | |
3373 | [P9_TREMOVE] = v9fs_remove, | |
3374 | }; | |
3375 | ||
ff06030f | 3376 | static void v9fs_op_not_supp(void *opaque) |
5c3234c6 | 3377 | { |
ff06030f VJJ |
3378 | V9fsPDU *pdu = opaque; |
3379 | complete_pdu(pdu->s, pdu, -EOPNOTSUPP); | |
5c3234c6 AK |
3380 | } |
3381 | ||
9f107513 AL |
3382 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3383 | { | |
ff06030f VJJ |
3384 | Coroutine *co; |
3385 | CoroutineEntry *handler; | |
9f107513 AL |
3386 | |
3387 | if (debug_9p_pdu) { | |
3388 | pprint_pdu(pdu); | |
3389 | } | |
ff06030f VJJ |
3390 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || |
3391 | (pdu_co_handlers[pdu->id] == NULL)) { | |
5c3234c6 AK |
3392 | handler = v9fs_op_not_supp; |
3393 | } else { | |
ff06030f | 3394 | handler = pdu_co_handlers[pdu->id]; |
5c3234c6 | 3395 | } |
ff06030f VJJ |
3396 | co = qemu_coroutine_create(handler); |
3397 | qemu_coroutine_enter(co, pdu); | |
9f107513 AL |
3398 | } |
3399 | ||
f4f61d27 | 3400 | void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
9f107513 AL |
3401 | { |
3402 | V9fsState *s = (V9fsState *)vdev; | |
3403 | V9fsPDU *pdu; | |
3404 | ssize_t len; | |
3405 | ||
3406 | while ((pdu = alloc_pdu(s)) && | |
3407 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
3408 | uint8_t *ptr; | |
ff06030f | 3409 | pdu->s = s; |
9f107513 AL |
3410 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3411 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
3412 | ||
3413 | ptr = pdu->elem.out_sg[0].iov_base; | |
3414 | ||
3415 | memcpy(&pdu->size, ptr, 4); | |
3416 | pdu->id = ptr[4]; | |
3417 | memcpy(&pdu->tag, ptr + 5, 2); | |
9f107513 AL |
3418 | submit_pdu(s, pdu); |
3419 | } | |
9f107513 AL |
3420 | free_pdu(s, pdu); |
3421 | } |