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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 | ||
a9231555 AL |
85 | static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
86 | { | |
87 | return s->ops->rewinddir(&s->ctx, dir); | |
88 | } | |
89 | ||
90 | static off_t v9fs_do_telldir(V9fsState *s, DIR *dir) | |
91 | { | |
92 | return s->ops->telldir(&s->ctx, dir); | |
93 | } | |
94 | ||
a9231555 AL |
95 | static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
96 | { | |
97 | return s->ops->seekdir(&s->ctx, dir, off); | |
98 | } | |
99 | ||
56d15a53 SG |
100 | static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov, |
101 | int iovcnt, int64_t offset) | |
a9231555 | 102 | { |
56d15a53 | 103 | return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset); |
a9231555 AL |
104 | } |
105 | ||
56d15a53 SG |
106 | static int v9fs_do_pwritev(V9fsState *s, int fd, const struct iovec *iov, |
107 | int iovcnt, int64_t offset) | |
a9231555 | 108 | { |
56d15a53 | 109 | return s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset); |
8449360c AL |
110 | } |
111 | ||
c494dd6f AL |
112 | static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
113 | { | |
e95ead32 VJJ |
114 | FsCred cred; |
115 | cred_init(&cred); | |
116 | cred.fc_mode = mode; | |
117 | return s->ops->chmod(&s->ctx, path->data, &cred); | |
c494dd6f AL |
118 | } |
119 | ||
c494dd6f AL |
120 | static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) |
121 | { | |
122 | return s->ops->link(&s->ctx, oldpath->data, newpath->data); | |
123 | } | |
124 | ||
8cf89e00 AL |
125 | static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
126 | { | |
127 | return s->ops->truncate(&s->ctx, path->data, size); | |
128 | } | |
129 | ||
8cf89e00 AL |
130 | static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) |
131 | { | |
f7613bee VJJ |
132 | FsCred cred; |
133 | cred_init(&cred); | |
134 | cred.fc_uid = uid; | |
135 | cred.fc_gid = gid; | |
136 | ||
137 | return s->ops->chown(&s->ctx, path->data, &cred); | |
8cf89e00 AL |
138 | } |
139 | ||
8fc39ae4 SK |
140 | static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
141 | const struct timespec times[2]) | |
8cf89e00 | 142 | { |
8fc39ae4 | 143 | return s->ops->utimensat(&s->ctx, path->data, times); |
8cf89e00 AL |
144 | } |
145 | ||
49594973 | 146 | static int v9fs_do_fsync(V9fsState *s, int fd, int datasync) |
8cf89e00 | 147 | { |
49594973 | 148 | return s->ops->fsync(&s->ctx, fd, datasync); |
8cf89e00 AL |
149 | } |
150 | ||
a03f7874 AL |
151 | static void v9fs_string_init(V9fsString *str) |
152 | { | |
153 | str->data = NULL; | |
154 | str->size = 0; | |
155 | } | |
156 | ||
157 | static void v9fs_string_free(V9fsString *str) | |
158 | { | |
7267c094 | 159 | g_free(str->data); |
a03f7874 AL |
160 | str->data = NULL; |
161 | str->size = 0; | |
162 | } | |
163 | ||
164 | static void v9fs_string_null(V9fsString *str) | |
165 | { | |
166 | v9fs_string_free(str); | |
167 | } | |
168 | ||
169 | static int number_to_string(void *arg, char type) | |
170 | { | |
171 | unsigned int ret = 0; | |
172 | ||
173 | switch (type) { | |
174 | case 'u': { | |
175 | unsigned int num = *(unsigned int *)arg; | |
176 | ||
177 | do { | |
178 | ret++; | |
179 | num = num/10; | |
180 | } while (num); | |
181 | break; | |
182 | } | |
45b23ff8 VJJ |
183 | case 'U': { |
184 | unsigned long num = *(unsigned long *)arg; | |
185 | do { | |
186 | ret++; | |
187 | num = num/10; | |
188 | } while (num); | |
189 | break; | |
190 | } | |
a03f7874 AL |
191 | default: |
192 | printf("Number_to_string: Unknown number format\n"); | |
193 | return -1; | |
194 | } | |
195 | ||
196 | return ret; | |
197 | } | |
198 | ||
c9ba47dc SW |
199 | static int GCC_FMT_ATTR(2, 0) |
200 | v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
a03f7874 AL |
201 | { |
202 | va_list ap2; | |
203 | char *iter = (char *)fmt; | |
204 | int len = 0; | |
205 | int nr_args = 0; | |
206 | char *arg_char_ptr; | |
207 | unsigned int arg_uint; | |
45b23ff8 | 208 | unsigned long arg_ulong; |
a03f7874 AL |
209 | |
210 | /* Find the number of %'s that denotes an argument */ | |
211 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
212 | nr_args++; | |
213 | iter++; | |
214 | } | |
215 | ||
216 | len = strlen(fmt) - 2*nr_args; | |
217 | ||
218 | if (!nr_args) { | |
219 | goto alloc_print; | |
220 | } | |
221 | ||
222 | va_copy(ap2, ap); | |
223 | ||
224 | iter = (char *)fmt; | |
225 | ||
226 | /* Now parse the format string */ | |
227 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
228 | iter++; | |
229 | switch (*iter) { | |
230 | case 'u': | |
231 | arg_uint = va_arg(ap2, unsigned int); | |
232 | len += number_to_string((void *)&arg_uint, 'u'); | |
233 | break; | |
45b23ff8 VJJ |
234 | case 'l': |
235 | if (*++iter == 'u') { | |
236 | arg_ulong = va_arg(ap2, unsigned long); | |
237 | len += number_to_string((void *)&arg_ulong, 'U'); | |
238 | } else { | |
239 | return -1; | |
240 | } | |
241 | break; | |
a03f7874 AL |
242 | case 's': |
243 | arg_char_ptr = va_arg(ap2, char *); | |
244 | len += strlen(arg_char_ptr); | |
245 | break; | |
246 | case 'c': | |
247 | len += 1; | |
248 | break; | |
249 | default: | |
250 | fprintf(stderr, | |
251 | "v9fs_string_alloc_printf:Incorrect format %c", *iter); | |
252 | return -1; | |
253 | } | |
254 | iter++; | |
255 | } | |
256 | ||
257 | alloc_print: | |
7267c094 | 258 | *strp = g_malloc((len + 1) * sizeof(**strp)); |
a03f7874 AL |
259 | |
260 | return vsprintf(*strp, fmt, ap); | |
261 | } | |
262 | ||
c9ba47dc SW |
263 | static void GCC_FMT_ATTR(2, 3) |
264 | v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
a03f7874 AL |
265 | { |
266 | va_list ap; | |
267 | int err; | |
268 | ||
269 | v9fs_string_free(str); | |
270 | ||
271 | va_start(ap, fmt); | |
272 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
273 | BUG_ON(err == -1); | |
274 | va_end(ap); | |
275 | ||
276 | str->size = err; | |
277 | } | |
278 | ||
279 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
280 | { | |
281 | v9fs_string_free(lhs); | |
282 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
283 | } | |
284 | ||
936532a4 MN |
285 | /* |
286 | * Return TRUE if s1 is an ancestor of s2. | |
287 | * | |
288 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". | |
289 | * As a special case, We treat s1 as ancestor of s2 if they are same! | |
290 | */ | |
291 | static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2) | |
292 | { | |
293 | if (!strncmp(s1->data, s2->data, s1->size)) { | |
294 | if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') { | |
295 | return 1; | |
296 | } | |
297 | } | |
298 | return 0; | |
299 | } | |
300 | ||
a03f7874 AL |
301 | static size_t v9fs_string_size(V9fsString *str) |
302 | { | |
303 | return str->size; | |
304 | } | |
305 | ||
286d5652 AL |
306 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
307 | { | |
308 | V9fsFidState *f; | |
309 | ||
310 | for (f = s->fid_list; f; f = f->next) { | |
311 | if (f->fid == fid) { | |
286d5652 AL |
312 | return f; |
313 | } | |
314 | } | |
315 | ||
316 | return NULL; | |
317 | } | |
318 | ||
319 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
320 | { | |
321 | V9fsFidState *f; | |
322 | ||
323 | f = lookup_fid(s, fid); | |
324 | if (f) { | |
325 | return NULL; | |
326 | } | |
327 | ||
7267c094 | 328 | f = g_malloc0(sizeof(V9fsFidState)); |
286d5652 AL |
329 | |
330 | f->fid = fid; | |
d62dbb51 | 331 | f->fid_type = P9_FID_NONE; |
286d5652 AL |
332 | |
333 | f->next = s->fid_list; | |
334 | s->fid_list = f; | |
335 | ||
336 | return f; | |
337 | } | |
338 | ||
10b468bd AK |
339 | static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
340 | { | |
341 | int retval = 0; | |
342 | ||
343 | if (fidp->fs.xattr.copied_len == -1) { | |
344 | /* getxattr/listxattr fid */ | |
345 | goto free_value; | |
346 | } | |
347 | /* | |
348 | * if this is fid for setxattr. clunk should | |
349 | * result in setxattr localcall | |
350 | */ | |
351 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
352 | /* clunk after partial write */ | |
353 | retval = -EINVAL; | |
354 | goto free_out; | |
355 | } | |
9ed3ef26 | 356 | if (fidp->fs.xattr.len) { |
c540ee51 | 357 | retval = v9fs_co_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, |
9ed3ef26 AK |
358 | fidp->fs.xattr.value, |
359 | fidp->fs.xattr.len, | |
360 | fidp->fs.xattr.flags); | |
361 | } else { | |
c540ee51 | 362 | retval = v9fs_co_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); |
9ed3ef26 | 363 | } |
10b468bd AK |
364 | free_out: |
365 | v9fs_string_free(&fidp->fs.xattr.name); | |
366 | free_value: | |
367 | if (fidp->fs.xattr.value) { | |
7267c094 | 368 | g_free(fidp->fs.xattr.value); |
10b468bd AK |
369 | } |
370 | return retval; | |
371 | } | |
372 | ||
286d5652 AL |
373 | static int free_fid(V9fsState *s, int32_t fid) |
374 | { | |
10b468bd | 375 | int retval = 0; |
286d5652 AL |
376 | V9fsFidState **fidpp, *fidp; |
377 | ||
378 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
379 | if ((*fidpp)->fid == fid) { | |
380 | break; | |
381 | } | |
382 | } | |
383 | ||
384 | if (*fidpp == NULL) { | |
385 | return -ENOENT; | |
386 | } | |
387 | ||
388 | fidp = *fidpp; | |
389 | *fidpp = fidp->next; | |
390 | ||
d62dbb51 | 391 | if (fidp->fid_type == P9_FID_FILE) { |
c540ee51 | 392 | retval = v9fs_co_close(s, fidp); |
d62dbb51 | 393 | } else if (fidp->fid_type == P9_FID_DIR) { |
c540ee51 | 394 | retval = v9fs_co_closedir(s, fidp); |
d62dbb51 | 395 | } else if (fidp->fid_type == P9_FID_XATTR) { |
10b468bd | 396 | retval = v9fs_xattr_fid_clunk(s, fidp); |
286d5652 AL |
397 | } |
398 | v9fs_string_free(&fidp->path); | |
7267c094 | 399 | g_free(fidp); |
10b468bd | 400 | return retval; |
286d5652 AL |
401 | } |
402 | ||
403 | #define P9_QID_TYPE_DIR 0x80 | |
404 | #define P9_QID_TYPE_SYMLINK 0x02 | |
405 | ||
406 | #define P9_STAT_MODE_DIR 0x80000000 | |
407 | #define P9_STAT_MODE_APPEND 0x40000000 | |
408 | #define P9_STAT_MODE_EXCL 0x20000000 | |
409 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
410 | #define P9_STAT_MODE_AUTH 0x08000000 | |
411 | #define P9_STAT_MODE_TMP 0x04000000 | |
412 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
413 | #define P9_STAT_MODE_LINK 0x01000000 | |
414 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
415 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
416 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
417 | #define P9_STAT_MODE_SETUID 0x00080000 | |
418 | #define P9_STAT_MODE_SETGID 0x00040000 | |
419 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
420 | ||
421 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
422 | P9_STAT_MODE_SYMLINK | \ | |
423 | P9_STAT_MODE_LINK | \ | |
424 | P9_STAT_MODE_DEVICE | \ | |
425 | P9_STAT_MODE_NAMED_PIPE | \ | |
426 | P9_STAT_MODE_SOCKET) | |
427 | ||
428 | /* This is the algorithm from ufs in spfs */ | |
429 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
430 | { | |
431 | size_t size; | |
432 | ||
433 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
434 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
435 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
436 | qidp->type = 0; | |
437 | if (S_ISDIR(stbuf->st_mode)) { | |
438 | qidp->type |= P9_QID_TYPE_DIR; | |
439 | } | |
440 | if (S_ISLNK(stbuf->st_mode)) { | |
441 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
442 | } | |
443 | } | |
444 | ||
445 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
446 | { | |
447 | struct stat stbuf; | |
448 | int err; | |
449 | ||
450 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
451 | if (err) { | |
452 | return err; | |
453 | } | |
454 | ||
455 | stat_to_qid(&stbuf, qidp); | |
456 | return 0; | |
457 | } | |
458 | ||
9f107513 AL |
459 | static V9fsPDU *alloc_pdu(V9fsState *s) |
460 | { | |
461 | V9fsPDU *pdu = NULL; | |
462 | ||
463 | if (!QLIST_EMPTY(&s->free_list)) { | |
464 | pdu = QLIST_FIRST(&s->free_list); | |
465 | QLIST_REMOVE(pdu, next); | |
466 | } | |
467 | return pdu; | |
468 | } | |
469 | ||
470 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
471 | { | |
472 | if (pdu) { | |
39792515 AK |
473 | if (debug_9p_pdu) { |
474 | pprint_pdu(pdu); | |
475 | } | |
476 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
9f107513 AL |
477 | } |
478 | } | |
479 | ||
480 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
481 | size_t offset, size_t size, int pack) | |
482 | { | |
483 | int i = 0; | |
484 | size_t copied = 0; | |
485 | ||
486 | for (i = 0; size && i < sg_count; i++) { | |
487 | size_t len; | |
488 | if (offset >= sg[i].iov_len) { | |
489 | /* skip this sg */ | |
490 | offset -= sg[i].iov_len; | |
491 | continue; | |
492 | } else { | |
493 | len = MIN(sg[i].iov_len - offset, size); | |
494 | if (pack) { | |
495 | memcpy(sg[i].iov_base + offset, addr, len); | |
496 | } else { | |
497 | memcpy(addr, sg[i].iov_base + offset, len); | |
498 | } | |
499 | size -= len; | |
500 | copied += len; | |
501 | addr += len; | |
502 | if (size) { | |
503 | offset = 0; | |
504 | continue; | |
505 | } | |
506 | } | |
507 | } | |
508 | ||
509 | return copied; | |
510 | } | |
511 | ||
405a549a AL |
512 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
513 | { | |
514 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
515 | offset, size, 0); | |
516 | } | |
517 | ||
518 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
519 | size_t size) | |
520 | { | |
521 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
522 | offset, size, 1); | |
523 | } | |
524 | ||
525 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
526 | { | |
527 | size_t pos = 0; | |
528 | int i, j; | |
529 | struct iovec *src_sg; | |
530 | unsigned int num; | |
531 | ||
532 | if (rx) { | |
533 | src_sg = pdu->elem.in_sg; | |
534 | num = pdu->elem.in_num; | |
535 | } else { | |
536 | src_sg = pdu->elem.out_sg; | |
537 | num = pdu->elem.out_num; | |
538 | } | |
539 | ||
540 | j = 0; | |
541 | for (i = 0; i < num; i++) { | |
542 | if (offset <= pos) { | |
543 | sg[j].iov_base = src_sg[i].iov_base; | |
544 | sg[j].iov_len = src_sg[i].iov_len; | |
545 | j++; | |
546 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
547 | sg[j].iov_base = src_sg[i].iov_base; | |
548 | sg[j].iov_len = src_sg[i].iov_len; | |
549 | sg[j].iov_base += (offset - pos); | |
550 | sg[j].iov_len -= (offset - pos); | |
551 | j++; | |
552 | } | |
553 | pos += src_sg[i].iov_len; | |
554 | } | |
555 | ||
556 | return j; | |
557 | } | |
558 | ||
559 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
560 | { | |
561 | size_t old_offset = offset; | |
562 | va_list ap; | |
563 | int i; | |
564 | ||
565 | va_start(ap, fmt); | |
566 | for (i = 0; fmt[i]; i++) { | |
567 | switch (fmt[i]) { | |
568 | case 'b': { | |
569 | uint8_t *valp = va_arg(ap, uint8_t *); | |
570 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
571 | break; | |
572 | } | |
573 | case 'w': { | |
574 | uint16_t val, *valp; | |
575 | valp = va_arg(ap, uint16_t *); | |
405a549a | 576 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 577 | *valp = le16_to_cpu(val); |
405a549a AL |
578 | break; |
579 | } | |
580 | case 'd': { | |
581 | uint32_t val, *valp; | |
582 | valp = va_arg(ap, uint32_t *); | |
405a549a | 583 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 584 | *valp = le32_to_cpu(val); |
405a549a AL |
585 | break; |
586 | } | |
587 | case 'q': { | |
588 | uint64_t val, *valp; | |
589 | valp = va_arg(ap, uint64_t *); | |
405a549a | 590 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 591 | *valp = le64_to_cpu(val); |
405a549a AL |
592 | break; |
593 | } | |
594 | case 'v': { | |
595 | struct iovec *iov = va_arg(ap, struct iovec *); | |
596 | int *iovcnt = va_arg(ap, int *); | |
597 | *iovcnt = pdu_copy_sg(pdu, offset, 0, iov); | |
598 | break; | |
599 | } | |
600 | case 's': { | |
601 | V9fsString *str = va_arg(ap, V9fsString *); | |
602 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
603 | /* FIXME: sanity check str->size */ | |
7267c094 | 604 | str->data = g_malloc(str->size + 1); |
405a549a AL |
605 | offset += pdu_unpack(str->data, pdu, offset, str->size); |
606 | str->data[str->size] = 0; | |
607 | break; | |
608 | } | |
609 | case 'Q': { | |
610 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
611 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
612 | &qidp->type, &qidp->version, &qidp->path); | |
613 | break; | |
614 | } | |
615 | case 'S': { | |
616 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
617 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
618 | &statp->size, &statp->type, &statp->dev, | |
619 | &statp->qid, &statp->mode, &statp->atime, | |
620 | &statp->mtime, &statp->length, | |
621 | &statp->name, &statp->uid, &statp->gid, | |
622 | &statp->muid, &statp->extension, | |
623 | &statp->n_uid, &statp->n_gid, | |
624 | &statp->n_muid); | |
625 | break; | |
626 | } | |
c79ce737 SK |
627 | case 'I': { |
628 | V9fsIattr *iattr = va_arg(ap, V9fsIattr *); | |
629 | offset += pdu_unmarshal(pdu, offset, "ddddqqqqq", | |
630 | &iattr->valid, &iattr->mode, | |
631 | &iattr->uid, &iattr->gid, &iattr->size, | |
632 | &iattr->atime_sec, &iattr->atime_nsec, | |
633 | &iattr->mtime_sec, &iattr->mtime_nsec); | |
634 | break; | |
635 | } | |
405a549a AL |
636 | default: |
637 | break; | |
638 | } | |
639 | } | |
640 | ||
641 | va_end(ap); | |
642 | ||
643 | return offset - old_offset; | |
644 | } | |
645 | ||
646 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
647 | { | |
648 | size_t old_offset = offset; | |
649 | va_list ap; | |
650 | int i; | |
651 | ||
652 | va_start(ap, fmt); | |
653 | for (i = 0; fmt[i]; i++) { | |
654 | switch (fmt[i]) { | |
655 | case 'b': { | |
656 | uint8_t val = va_arg(ap, int); | |
657 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
658 | break; | |
659 | } | |
660 | case 'w': { | |
661 | uint16_t val; | |
662 | cpu_to_le16w(&val, va_arg(ap, int)); | |
663 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
664 | break; | |
665 | } | |
666 | case 'd': { | |
667 | uint32_t val; | |
668 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
669 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
670 | break; | |
671 | } | |
672 | case 'q': { | |
673 | uint64_t val; | |
674 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
675 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
676 | break; | |
677 | } | |
678 | case 'v': { | |
679 | struct iovec *iov = va_arg(ap, struct iovec *); | |
680 | int *iovcnt = va_arg(ap, int *); | |
681 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
682 | break; | |
683 | } | |
684 | case 's': { | |
685 | V9fsString *str = va_arg(ap, V9fsString *); | |
686 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
687 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
688 | break; | |
689 | } | |
690 | case 'Q': { | |
691 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
692 | offset += pdu_marshal(pdu, offset, "bdq", | |
693 | qidp->type, qidp->version, qidp->path); | |
694 | break; | |
695 | } | |
696 | case 'S': { | |
697 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
698 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
699 | statp->size, statp->type, statp->dev, | |
700 | &statp->qid, statp->mode, statp->atime, | |
701 | statp->mtime, statp->length, &statp->name, | |
702 | &statp->uid, &statp->gid, &statp->muid, | |
703 | &statp->extension, statp->n_uid, | |
704 | statp->n_gid, statp->n_muid); | |
705 | break; | |
706 | } | |
00ede4c2 SK |
707 | case 'A': { |
708 | V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); | |
709 | offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq", | |
710 | statp->st_result_mask, | |
711 | &statp->qid, statp->st_mode, | |
712 | statp->st_uid, statp->st_gid, | |
713 | statp->st_nlink, statp->st_rdev, | |
714 | statp->st_size, statp->st_blksize, statp->st_blocks, | |
715 | statp->st_atime_sec, statp->st_atime_nsec, | |
716 | statp->st_mtime_sec, statp->st_mtime_nsec, | |
717 | statp->st_ctime_sec, statp->st_ctime_nsec, | |
718 | statp->st_btime_sec, statp->st_btime_nsec, | |
719 | statp->st_gen, statp->st_data_version); | |
720 | break; | |
721 | } | |
405a549a AL |
722 | default: |
723 | break; | |
724 | } | |
725 | } | |
726 | va_end(ap); | |
727 | ||
728 | return offset - old_offset; | |
729 | } | |
730 | ||
731 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
732 | { | |
733 | int8_t id = pdu->id + 1; /* Response */ | |
734 | ||
735 | if (len < 0) { | |
405a549a | 736 | int err = -len; |
8f4d1ca5 | 737 | len = 7; |
405a549a | 738 | |
8f4d1ca5 AB |
739 | if (s->proto_version != V9FS_PROTO_2000L) { |
740 | V9fsString str; | |
741 | ||
742 | str.data = strerror(err); | |
743 | str.size = strlen(str.data); | |
744 | ||
745 | len += pdu_marshal(pdu, len, "s", &str); | |
746 | id = P9_RERROR; | |
747 | } | |
405a549a | 748 | |
cf03eb2c | 749 | len += pdu_marshal(pdu, len, "d", err); |
405a549a | 750 | |
8f4d1ca5 AB |
751 | if (s->proto_version == V9FS_PROTO_2000L) { |
752 | id = P9_RLERROR; | |
753 | } | |
405a549a AL |
754 | } |
755 | ||
756 | /* fill out the header */ | |
757 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
758 | ||
759 | /* keep these in sync */ | |
760 | pdu->size = len; | |
761 | pdu->id = id; | |
762 | ||
763 | /* push onto queue and notify */ | |
764 | virtqueue_push(s->vq, &pdu->elem, len); | |
765 | ||
766 | /* FIXME: we should batch these completions */ | |
767 | virtio_notify(&s->vdev, s->vq); | |
768 | ||
769 | free_pdu(s, pdu); | |
770 | } | |
771 | ||
bb9e3216 AL |
772 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
773 | { | |
774 | mode_t ret; | |
775 | ||
776 | ret = mode & 0777; | |
777 | if (mode & P9_STAT_MODE_DIR) { | |
778 | ret |= S_IFDIR; | |
779 | } | |
780 | ||
cf03eb2c AB |
781 | if (mode & P9_STAT_MODE_SYMLINK) { |
782 | ret |= S_IFLNK; | |
783 | } | |
784 | if (mode & P9_STAT_MODE_SOCKET) { | |
785 | ret |= S_IFSOCK; | |
786 | } | |
787 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
788 | ret |= S_IFIFO; | |
789 | } | |
790 | if (mode & P9_STAT_MODE_DEVICE) { | |
791 | if (extension && extension->data[0] == 'c') { | |
792 | ret |= S_IFCHR; | |
793 | } else { | |
794 | ret |= S_IFBLK; | |
bb9e3216 AL |
795 | } |
796 | } | |
797 | ||
798 | if (!(ret&~0777)) { | |
799 | ret |= S_IFREG; | |
800 | } | |
801 | ||
802 | if (mode & P9_STAT_MODE_SETUID) { | |
803 | ret |= S_ISUID; | |
804 | } | |
805 | if (mode & P9_STAT_MODE_SETGID) { | |
806 | ret |= S_ISGID; | |
807 | } | |
808 | if (mode & P9_STAT_MODE_SETVTX) { | |
809 | ret |= S_ISVTX; | |
810 | } | |
811 | ||
812 | return ret; | |
813 | } | |
814 | ||
815 | static int donttouch_stat(V9fsStat *stat) | |
816 | { | |
817 | if (stat->type == -1 && | |
818 | stat->dev == -1 && | |
819 | stat->qid.type == -1 && | |
820 | stat->qid.version == -1 && | |
821 | stat->qid.path == -1 && | |
822 | stat->mode == -1 && | |
823 | stat->atime == -1 && | |
824 | stat->mtime == -1 && | |
825 | stat->length == -1 && | |
826 | !stat->name.size && | |
827 | !stat->uid.size && | |
828 | !stat->gid.size && | |
829 | !stat->muid.size && | |
830 | stat->n_uid == -1 && | |
831 | stat->n_gid == -1 && | |
832 | stat->n_muid == -1) { | |
833 | return 1; | |
834 | } | |
835 | ||
836 | return 0; | |
837 | } | |
838 | ||
839 | static void v9fs_stat_free(V9fsStat *stat) | |
840 | { | |
841 | v9fs_string_free(&stat->name); | |
842 | v9fs_string_free(&stat->uid); | |
843 | v9fs_string_free(&stat->gid); | |
844 | v9fs_string_free(&stat->muid); | |
845 | v9fs_string_free(&stat->extension); | |
846 | } | |
847 | ||
848 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
849 | { | |
850 | uint32_t mode; | |
851 | ||
852 | mode = stbuf->st_mode & 0777; | |
853 | if (S_ISDIR(stbuf->st_mode)) { | |
854 | mode |= P9_STAT_MODE_DIR; | |
855 | } | |
856 | ||
cf03eb2c AB |
857 | if (S_ISLNK(stbuf->st_mode)) { |
858 | mode |= P9_STAT_MODE_SYMLINK; | |
859 | } | |
bb9e3216 | 860 | |
cf03eb2c AB |
861 | if (S_ISSOCK(stbuf->st_mode)) { |
862 | mode |= P9_STAT_MODE_SOCKET; | |
863 | } | |
bb9e3216 | 864 | |
cf03eb2c AB |
865 | if (S_ISFIFO(stbuf->st_mode)) { |
866 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
867 | } | |
bb9e3216 | 868 | |
cf03eb2c AB |
869 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
870 | mode |= P9_STAT_MODE_DEVICE; | |
871 | } | |
bb9e3216 | 872 | |
cf03eb2c AB |
873 | if (stbuf->st_mode & S_ISUID) { |
874 | mode |= P9_STAT_MODE_SETUID; | |
875 | } | |
bb9e3216 | 876 | |
cf03eb2c AB |
877 | if (stbuf->st_mode & S_ISGID) { |
878 | mode |= P9_STAT_MODE_SETGID; | |
879 | } | |
bb9e3216 | 880 | |
cf03eb2c AB |
881 | if (stbuf->st_mode & S_ISVTX) { |
882 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
883 | } |
884 | ||
885 | return mode; | |
886 | } | |
887 | ||
888 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
889 | const struct stat *stbuf, | |
890 | V9fsStat *v9stat) | |
891 | { | |
892 | int err; | |
893 | const char *str; | |
894 | ||
895 | memset(v9stat, 0, sizeof(*v9stat)); | |
896 | ||
897 | stat_to_qid(stbuf, &v9stat->qid); | |
898 | v9stat->mode = stat_to_v9mode(stbuf); | |
899 | v9stat->atime = stbuf->st_atime; | |
900 | v9stat->mtime = stbuf->st_mtime; | |
901 | v9stat->length = stbuf->st_size; | |
902 | ||
903 | v9fs_string_null(&v9stat->uid); | |
904 | v9fs_string_null(&v9stat->gid); | |
905 | v9fs_string_null(&v9stat->muid); | |
906 | ||
cf03eb2c AB |
907 | v9stat->n_uid = stbuf->st_uid; |
908 | v9stat->n_gid = stbuf->st_gid; | |
909 | v9stat->n_muid = 0; | |
bb9e3216 | 910 | |
cf03eb2c | 911 | v9fs_string_null(&v9stat->extension); |
bb9e3216 | 912 | |
cf03eb2c | 913 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
7a5ca31e VJ |
914 | err = v9fs_co_readlink(s, name, &v9stat->extension); |
915 | if (err < 0) { | |
cf03eb2c | 916 | return err; |
bb9e3216 | 917 | } |
cf03eb2c AB |
918 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
919 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
920 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
921 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
922 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
923 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
924 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
925 | } |
926 | ||
927 | str = strrchr(name->data, '/'); | |
928 | if (str) { | |
929 | str += 1; | |
930 | } else { | |
931 | str = name->data; | |
932 | } | |
933 | ||
934 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
935 | ||
936 | v9stat->size = 61 + | |
937 | v9fs_string_size(&v9stat->name) + | |
938 | v9fs_string_size(&v9stat->uid) + | |
939 | v9fs_string_size(&v9stat->gid) + | |
940 | v9fs_string_size(&v9stat->muid) + | |
941 | v9fs_string_size(&v9stat->extension); | |
942 | return 0; | |
943 | } | |
944 | ||
00ede4c2 SK |
945 | #define P9_STATS_MODE 0x00000001ULL |
946 | #define P9_STATS_NLINK 0x00000002ULL | |
947 | #define P9_STATS_UID 0x00000004ULL | |
948 | #define P9_STATS_GID 0x00000008ULL | |
949 | #define P9_STATS_RDEV 0x00000010ULL | |
950 | #define P9_STATS_ATIME 0x00000020ULL | |
951 | #define P9_STATS_MTIME 0x00000040ULL | |
952 | #define P9_STATS_CTIME 0x00000080ULL | |
953 | #define P9_STATS_INO 0x00000100ULL | |
954 | #define P9_STATS_SIZE 0x00000200ULL | |
955 | #define P9_STATS_BLOCKS 0x00000400ULL | |
956 | ||
957 | #define P9_STATS_BTIME 0x00000800ULL | |
958 | #define P9_STATS_GEN 0x00001000ULL | |
959 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
960 | ||
961 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
962 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
963 | ||
964 | ||
965 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, | |
8db21ce7 | 966 | V9fsStatDotl *v9lstat) |
00ede4c2 SK |
967 | { |
968 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
969 | ||
970 | v9lstat->st_mode = stbuf->st_mode; | |
971 | v9lstat->st_nlink = stbuf->st_nlink; | |
972 | v9lstat->st_uid = stbuf->st_uid; | |
973 | v9lstat->st_gid = stbuf->st_gid; | |
974 | v9lstat->st_rdev = stbuf->st_rdev; | |
975 | v9lstat->st_size = stbuf->st_size; | |
976 | v9lstat->st_blksize = stbuf->st_blksize; | |
977 | v9lstat->st_blocks = stbuf->st_blocks; | |
978 | v9lstat->st_atime_sec = stbuf->st_atime; | |
979 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
980 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
981 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
982 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
983 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
984 | /* Currently we only support BASIC fields in stat */ | |
985 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
986 | ||
987 | stat_to_qid(stbuf, &v9lstat->qid); | |
988 | } | |
989 | ||
1f5a89bf AL |
990 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
991 | { | |
992 | while (len && *iovcnt) { | |
993 | if (len < sg->iov_len) { | |
994 | sg->iov_len -= len; | |
995 | sg->iov_base += len; | |
996 | len = 0; | |
997 | } else { | |
998 | len -= sg->iov_len; | |
999 | sg++; | |
1000 | *iovcnt -= 1; | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | return sg; | |
1005 | } | |
1006 | ||
1007 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
1008 | { | |
1009 | int i; | |
1010 | int total = 0; | |
1011 | ||
1012 | for (i = 0; i < *cnt; i++) { | |
1013 | if ((total + sg[i].iov_len) > cap) { | |
1014 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
1015 | i++; | |
1016 | break; | |
1017 | } | |
1018 | total += sg[i].iov_len; | |
1019 | } | |
1020 | ||
1021 | *cnt = i; | |
1022 | ||
1023 | return sg; | |
1024 | } | |
1025 | ||
1026 | static void print_sg(struct iovec *sg, int cnt) | |
1027 | { | |
1028 | int i; | |
1029 | ||
1030 | printf("sg[%d]: {", cnt); | |
1031 | for (i = 0; i < cnt; i++) { | |
1032 | if (i) { | |
1033 | printf(", "); | |
1034 | } | |
1035 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1036 | } | |
1037 | printf("}\n"); | |
1038 | } | |
1039 | ||
8cf89e00 AL |
1040 | static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1041 | { | |
1042 | V9fsString str; | |
1043 | v9fs_string_init(&str); | |
1044 | v9fs_string_copy(&str, dst); | |
1045 | v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len); | |
1046 | v9fs_string_free(&str); | |
1047 | } | |
1048 | ||
ff06030f | 1049 | static void v9fs_version(void *opaque) |
9f107513 | 1050 | { |
ff06030f VJJ |
1051 | V9fsPDU *pdu = opaque; |
1052 | V9fsState *s = pdu->s; | |
92c1ad03 AL |
1053 | V9fsString version; |
1054 | size_t offset = 7; | |
1055 | ||
5e94c103 | 1056 | pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); |
92c1ad03 | 1057 | |
84151514 MK |
1058 | if (!strcmp(version.data, "9P2000.u")) { |
1059 | s->proto_version = V9FS_PROTO_2000U; | |
1060 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1061 | s->proto_version = V9FS_PROTO_2000L; | |
1062 | } else { | |
92c1ad03 | 1063 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 1064 | } |
92c1ad03 | 1065 | |
5e94c103 | 1066 | offset += pdu_marshal(pdu, offset, "ds", s->msize, &version); |
92c1ad03 AL |
1067 | complete_pdu(s, pdu, offset); |
1068 | ||
1069 | v9fs_string_free(&version); | |
ff06030f | 1070 | return; |
9f107513 AL |
1071 | } |
1072 | ||
ff06030f | 1073 | static void v9fs_attach(void *opaque) |
9f107513 | 1074 | { |
ff06030f VJJ |
1075 | V9fsPDU *pdu = opaque; |
1076 | V9fsState *s = pdu->s; | |
955efc47 AL |
1077 | int32_t fid, afid, n_uname; |
1078 | V9fsString uname, aname; | |
1079 | V9fsFidState *fidp; | |
1080 | V9fsQID qid; | |
1081 | size_t offset = 7; | |
1082 | ssize_t err; | |
1083 | ||
1084 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
1085 | ||
1086 | fidp = alloc_fid(s, fid); | |
1087 | if (fidp == NULL) { | |
1088 | err = -EINVAL; | |
1089 | goto out; | |
9f107513 | 1090 | } |
955efc47 AL |
1091 | |
1092 | fidp->uid = n_uname; | |
1093 | ||
1094 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
1095 | err = fid_to_qid(s, fidp, &qid); | |
1096 | if (err) { | |
1097 | err = -EINVAL; | |
1098 | free_fid(s, fid); | |
1099 | goto out; | |
1100 | } | |
1101 | ||
1102 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
1103 | ||
1104 | err = offset; | |
1105 | out: | |
1106 | complete_pdu(s, pdu, err); | |
1107 | v9fs_string_free(&uname); | |
1108 | v9fs_string_free(&aname); | |
9f107513 AL |
1109 | } |
1110 | ||
ff06030f | 1111 | static void v9fs_stat(void *opaque) |
9f107513 | 1112 | { |
4da7d3fa | 1113 | int32_t fid; |
d8e0c29e | 1114 | V9fsStat v9stat; |
4da7d3fa | 1115 | ssize_t err = 0; |
d8e0c29e AK |
1116 | size_t offset = 7; |
1117 | struct stat stbuf; | |
1118 | V9fsFidState *fidp; | |
1119 | V9fsPDU *pdu = opaque; | |
1120 | V9fsState *s = pdu->s; | |
4da7d3fa | 1121 | |
d8e0c29e AK |
1122 | pdu_unmarshal(pdu, offset, "d", &fid); |
1123 | fidp = lookup_fid(s, fid); | |
1124 | if (fidp == NULL) { | |
4da7d3fa AL |
1125 | err = -ENOENT; |
1126 | goto out; | |
9f107513 | 1127 | } |
d8e0c29e AK |
1128 | err = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1129 | if (err < 0) { | |
1130 | goto out; | |
1131 | } | |
1132 | err = stat_to_v9stat(s, &fidp->path, &stbuf, &v9stat); | |
1133 | if (err < 0) { | |
1134 | goto out; | |
1135 | } | |
1136 | offset += pdu_marshal(pdu, offset, "wS", 0, &v9stat); | |
1137 | err = offset; | |
1138 | v9fs_stat_free(&v9stat); | |
4da7d3fa | 1139 | out: |
d8e0c29e | 1140 | complete_pdu(s, pdu, err); |
9f107513 AL |
1141 | } |
1142 | ||
ff06030f | 1143 | static void v9fs_getattr(void *opaque) |
00ede4c2 SK |
1144 | { |
1145 | int32_t fid; | |
8db21ce7 AK |
1146 | size_t offset = 7; |
1147 | ssize_t retval = 0; | |
1148 | struct stat stbuf; | |
00ede4c2 SK |
1149 | V9fsFidState *fidp; |
1150 | uint64_t request_mask; | |
8db21ce7 AK |
1151 | V9fsStatDotl v9stat_dotl; |
1152 | V9fsPDU *pdu = opaque; | |
1153 | V9fsState *s = pdu->s; | |
00ede4c2 | 1154 | |
8db21ce7 | 1155 | pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); |
00ede4c2 SK |
1156 | |
1157 | fidp = lookup_fid(s, fid); | |
1158 | if (fidp == NULL) { | |
8db21ce7 | 1159 | retval = -ENOENT; |
00ede4c2 SK |
1160 | goto out; |
1161 | } | |
8db21ce7 AK |
1162 | /* |
1163 | * Currently we only support BASIC fields in stat, so there is no | |
00ede4c2 SK |
1164 | * need to look at request_mask. |
1165 | */ | |
8db21ce7 AK |
1166 | retval = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1167 | if (retval < 0) { | |
1168 | goto out; | |
1169 | } | |
1170 | stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); | |
1171 | retval = offset; | |
1172 | retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl); | |
00ede4c2 | 1173 | out: |
8db21ce7 | 1174 | complete_pdu(s, pdu, retval); |
00ede4c2 SK |
1175 | } |
1176 | ||
c79ce737 SK |
1177 | /* From Linux kernel code */ |
1178 | #define ATTR_MODE (1 << 0) | |
1179 | #define ATTR_UID (1 << 1) | |
1180 | #define ATTR_GID (1 << 2) | |
1181 | #define ATTR_SIZE (1 << 3) | |
1182 | #define ATTR_ATIME (1 << 4) | |
1183 | #define ATTR_MTIME (1 << 5) | |
1184 | #define ATTR_CTIME (1 << 6) | |
1185 | #define ATTR_MASK 127 | |
1186 | #define ATTR_ATIME_SET (1 << 7) | |
1187 | #define ATTR_MTIME_SET (1 << 8) | |
1188 | ||
65c05f9a | 1189 | static void v9fs_setattr(void *opaque) |
c79ce737 | 1190 | { |
65c05f9a AK |
1191 | int err = 0; |
1192 | int32_t fid; | |
1193 | V9fsFidState *fidp; | |
1194 | size_t offset = 7; | |
1195 | V9fsIattr v9iattr; | |
1196 | V9fsPDU *pdu = opaque; | |
1197 | V9fsState *s = pdu->s; | |
c79ce737 | 1198 | |
65c05f9a | 1199 | pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); |
c79ce737 | 1200 | |
65c05f9a AK |
1201 | fidp = lookup_fid(s, fid); |
1202 | if (fidp == NULL) { | |
1203 | err = -EINVAL; | |
c79ce737 SK |
1204 | goto out; |
1205 | } | |
65c05f9a AK |
1206 | if (v9iattr.valid & ATTR_MODE) { |
1207 | err = v9fs_co_chmod(s, &fidp->path, v9iattr.mode); | |
1208 | if (err < 0) { | |
1209 | goto out; | |
c79ce737 | 1210 | } |
c79ce737 | 1211 | } |
65c05f9a | 1212 | if (v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) { |
c79ce737 | 1213 | struct timespec times[2]; |
65c05f9a AK |
1214 | if (v9iattr.valid & ATTR_ATIME) { |
1215 | if (v9iattr.valid & ATTR_ATIME_SET) { | |
1216 | times[0].tv_sec = v9iattr.atime_sec; | |
1217 | times[0].tv_nsec = v9iattr.atime_nsec; | |
c79ce737 SK |
1218 | } else { |
1219 | times[0].tv_nsec = UTIME_NOW; | |
1220 | } | |
1221 | } else { | |
1222 | times[0].tv_nsec = UTIME_OMIT; | |
1223 | } | |
65c05f9a AK |
1224 | if (v9iattr.valid & ATTR_MTIME) { |
1225 | if (v9iattr.valid & ATTR_MTIME_SET) { | |
1226 | times[1].tv_sec = v9iattr.mtime_sec; | |
1227 | times[1].tv_nsec = v9iattr.mtime_nsec; | |
c79ce737 SK |
1228 | } else { |
1229 | times[1].tv_nsec = UTIME_NOW; | |
1230 | } | |
1231 | } else { | |
1232 | times[1].tv_nsec = UTIME_OMIT; | |
1233 | } | |
65c05f9a AK |
1234 | err = v9fs_co_utimensat(s, &fidp->path, times); |
1235 | if (err < 0) { | |
1236 | goto out; | |
1237 | } | |
c79ce737 | 1238 | } |
65c05f9a AK |
1239 | /* |
1240 | * If the only valid entry in iattr is ctime we can call | |
1241 | * chown(-1,-1) to update the ctime of the file | |
1242 | */ | |
1243 | if ((v9iattr.valid & (ATTR_UID | ATTR_GID)) || | |
1244 | ((v9iattr.valid & ATTR_CTIME) | |
1245 | && !((v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { | |
1246 | if (!(v9iattr.valid & ATTR_UID)) { | |
1247 | v9iattr.uid = -1; | |
1248 | } | |
1249 | if (!(v9iattr.valid & ATTR_GID)) { | |
1250 | v9iattr.gid = -1; | |
1251 | } | |
1252 | err = v9fs_co_chown(s, &fidp->path, v9iattr.uid, | |
1253 | v9iattr.gid); | |
1254 | if (err < 0) { | |
1255 | goto out; | |
1256 | } | |
c79ce737 | 1257 | } |
65c05f9a AK |
1258 | if (v9iattr.valid & (ATTR_SIZE)) { |
1259 | err = v9fs_co_truncate(s, &fidp->path, v9iattr.size); | |
1260 | if (err < 0) { | |
1261 | goto out; | |
1262 | } | |
c79ce737 | 1263 | } |
65c05f9a | 1264 | err = offset; |
c79ce737 | 1265 | out: |
65c05f9a | 1266 | complete_pdu(s, pdu, err); |
c79ce737 SK |
1267 | } |
1268 | ||
3cc19c0c | 1269 | static int v9fs_walk_marshal(V9fsPDU *pdu, uint16_t nwnames, V9fsQID *qids) |
ff5e54c9 AL |
1270 | { |
1271 | int i; | |
3cc19c0c AK |
1272 | size_t offset = 7; |
1273 | offset += pdu_marshal(pdu, offset, "w", nwnames); | |
1274 | for (i = 0; i < nwnames; i++) { | |
1275 | offset += pdu_marshal(pdu, offset, "Q", &qids[i]); | |
ff5e54c9 | 1276 | } |
3cc19c0c | 1277 | return offset; |
ff5e54c9 AL |
1278 | } |
1279 | ||
ff06030f | 1280 | static void v9fs_walk(void *opaque) |
9f107513 | 1281 | { |
3cc19c0c AK |
1282 | int name_idx; |
1283 | V9fsQID *qids = NULL; | |
1284 | int i, err = 0; | |
1285 | V9fsString path; | |
1286 | uint16_t nwnames; | |
1287 | struct stat stbuf; | |
1288 | size_t offset = 7; | |
1289 | int32_t fid, newfid; | |
1290 | V9fsString *wnames = NULL; | |
1291 | V9fsFidState *fidp; | |
1292 | V9fsFidState *newfidp; | |
ff06030f VJJ |
1293 | V9fsPDU *pdu = opaque; |
1294 | V9fsState *s = pdu->s; | |
ff5e54c9 | 1295 | |
3cc19c0c AK |
1296 | offset += pdu_unmarshal(pdu, offset, "ddw", &fid, |
1297 | &newfid, &nwnames); | |
ff5e54c9 | 1298 | |
3cc19c0c AK |
1299 | if (nwnames && nwnames <= P9_MAXWELEM) { |
1300 | wnames = g_malloc0(sizeof(wnames[0]) * nwnames); | |
1301 | qids = g_malloc0(sizeof(qids[0]) * nwnames); | |
1302 | for (i = 0; i < nwnames; i++) { | |
1303 | offset += pdu_unmarshal(pdu, offset, "s", &wnames[i]); | |
ff5e54c9 | 1304 | } |
3cc19c0c AK |
1305 | |
1306 | } else if (nwnames > P9_MAXWELEM) { | |
4f8dee2d HPB |
1307 | err = -EINVAL; |
1308 | goto out; | |
ff5e54c9 | 1309 | } |
3cc19c0c AK |
1310 | fidp = lookup_fid(s, fid); |
1311 | if (fidp == NULL) { | |
ff5e54c9 AL |
1312 | err = -ENOENT; |
1313 | goto out; | |
1314 | } | |
ff5e54c9 | 1315 | if (fid == newfid) { |
3cc19c0c AK |
1316 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
1317 | v9fs_string_init(&path); | |
1318 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
1319 | v9fs_string_sprintf(&path, "%s/%s", | |
1320 | fidp->path.data, wnames[name_idx].data); | |
1321 | v9fs_string_copy(&fidp->path, &path); | |
1322 | ||
1323 | err = v9fs_co_lstat(s, &fidp->path, &stbuf); | |
1324 | if (err < 0) { | |
1325 | v9fs_string_free(&path); | |
1326 | goto out; | |
1327 | } | |
1328 | stat_to_qid(&stbuf, &qids[name_idx]); | |
ff5e54c9 | 1329 | } |
3cc19c0c | 1330 | v9fs_string_free(&path); |
ff5e54c9 | 1331 | } else { |
3cc19c0c AK |
1332 | newfidp = alloc_fid(s, newfid); |
1333 | if (newfidp == NULL) { | |
ff5e54c9 AL |
1334 | err = -EINVAL; |
1335 | goto out; | |
1336 | } | |
3cc19c0c AK |
1337 | newfidp->uid = fidp->uid; |
1338 | v9fs_string_init(&path); | |
1339 | v9fs_string_copy(&newfidp->path, &fidp->path); | |
1340 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
1341 | v9fs_string_sprintf(&path, "%s/%s", newfidp->path.data, | |
1342 | wnames[name_idx].data); | |
1343 | v9fs_string_copy(&newfidp->path, &path); | |
1344 | err = v9fs_co_lstat(s, &newfidp->path, &stbuf); | |
1345 | if (err < 0) { | |
1346 | free_fid(s, newfidp->fid); | |
1347 | v9fs_string_free(&path); | |
1348 | goto out; | |
1349 | } | |
1350 | stat_to_qid(&stbuf, &qids[name_idx]); | |
ff5e54c9 | 1351 | } |
3cc19c0c | 1352 | v9fs_string_free(&path); |
9f107513 | 1353 | } |
3cc19c0c | 1354 | err = v9fs_walk_marshal(pdu, nwnames, qids); |
ff5e54c9 | 1355 | out: |
3cc19c0c AK |
1356 | complete_pdu(s, pdu, err); |
1357 | if (nwnames && nwnames <= P9_MAXWELEM) { | |
1358 | for (name_idx = 0; name_idx < nwnames; name_idx++) { | |
1359 | v9fs_string_free(&wnames[name_idx]); | |
1360 | } | |
1361 | g_free(wnames); | |
1362 | g_free(qids); | |
1363 | } | |
9f107513 AL |
1364 | } |
1365 | ||
5e94c103 MK |
1366 | static int32_t get_iounit(V9fsState *s, V9fsString *name) |
1367 | { | |
1368 | struct statfs stbuf; | |
1369 | int32_t iounit = 0; | |
1370 | ||
1371 | /* | |
1372 | * iounit should be multiples of f_bsize (host filesystem block size | |
1373 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1374 | */ | |
857bc158 | 1375 | if (!v9fs_co_statfs(s, name, &stbuf)) { |
5e94c103 MK |
1376 | iounit = stbuf.f_bsize; |
1377 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1378 | } | |
5e94c103 MK |
1379 | if (!iounit) { |
1380 | iounit = s->msize - P9_IOHDRSZ; | |
1381 | } | |
1382 | return iounit; | |
1383 | } | |
1384 | ||
857bc158 | 1385 | static void v9fs_open(void *opaque) |
5e94c103 | 1386 | { |
857bc158 AK |
1387 | int flags; |
1388 | int iounit; | |
1389 | int32_t fid; | |
1390 | int32_t mode; | |
1391 | V9fsQID qid; | |
1392 | ssize_t err = 0; | |
1393 | size_t offset = 7; | |
1394 | struct stat stbuf; | |
1395 | V9fsFidState *fidp; | |
1396 | V9fsPDU *pdu = opaque; | |
1397 | V9fsState *s = pdu->s; | |
5e94c103 | 1398 | |
857bc158 AK |
1399 | if (s->proto_version == V9FS_PROTO_2000L) { |
1400 | pdu_unmarshal(pdu, offset, "dd", &fid, &mode); | |
1401 | } else { | |
1402 | pdu_unmarshal(pdu, offset, "db", &fid, &mode); | |
1403 | } | |
1404 | fidp = lookup_fid(s, fid); | |
1405 | if (fidp == NULL) { | |
1406 | err = -ENOENT; | |
a6568fe2 AL |
1407 | goto out; |
1408 | } | |
857bc158 | 1409 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
a6568fe2 | 1410 | |
857bc158 AK |
1411 | err = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1412 | if (err < 0) { | |
a6568fe2 AL |
1413 | goto out; |
1414 | } | |
857bc158 AK |
1415 | stat_to_qid(&stbuf, &qid); |
1416 | if (S_ISDIR(stbuf.st_mode)) { | |
1417 | err = v9fs_co_opendir(s, fidp); | |
1418 | if (err < 0) { | |
1419 | goto out; | |
1420 | } | |
1421 | fidp->fid_type = P9_FID_DIR; | |
1422 | offset += pdu_marshal(pdu, offset, "Qd", &qid, 0); | |
1423 | err = offset; | |
a6568fe2 | 1424 | } else { |
771e9d4c | 1425 | if (s->proto_version == V9FS_PROTO_2000L) { |
857bc158 | 1426 | flags = mode; |
630c2689 | 1427 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
0f8151cb VJJ |
1428 | /* Ignore direct disk access hint until the server supports it. */ |
1429 | flags &= ~O_DIRECT; | |
771e9d4c | 1430 | } else { |
857bc158 | 1431 | flags = omode_to_uflags(mode); |
771e9d4c | 1432 | } |
857bc158 AK |
1433 | err = v9fs_co_open(s, fidp, flags); |
1434 | if (err < 0) { | |
1435 | goto out; | |
1436 | } | |
1437 | fidp->fid_type = P9_FID_FILE; | |
1438 | iounit = get_iounit(s, &fidp->path); | |
1439 | offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit); | |
1440 | err = offset; | |
a6568fe2 | 1441 | } |
a6568fe2 AL |
1442 | out: |
1443 | complete_pdu(s, pdu, err); | |
a6568fe2 AL |
1444 | } |
1445 | ||
ff06030f | 1446 | static void v9fs_lcreate(void *opaque) |
c1568af5 VJJ |
1447 | { |
1448 | int32_t dfid, flags, mode; | |
1449 | gid_t gid; | |
c1568af5 | 1450 | ssize_t err = 0; |
36f8981f VJ |
1451 | ssize_t offset = 7; |
1452 | V9fsString fullname; | |
1453 | V9fsString name; | |
1454 | V9fsFidState *fidp; | |
1455 | struct stat stbuf; | |
1456 | V9fsQID qid; | |
1457 | int32_t iounit; | |
1458 | V9fsPDU *pdu = opaque; | |
c1568af5 | 1459 | |
36f8981f VJ |
1460 | v9fs_string_init(&fullname); |
1461 | pdu_unmarshal(pdu, offset, "dsddd", &dfid, &name, &flags, | |
1462 | &mode, &gid); | |
c1568af5 | 1463 | |
36f8981f VJ |
1464 | fidp = lookup_fid(pdu->s, dfid); |
1465 | if (fidp == NULL) { | |
c1568af5 VJJ |
1466 | err = -ENOENT; |
1467 | goto out; | |
1468 | } | |
36f8981f | 1469 | v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); |
c1568af5 | 1470 | |
0f8151cb VJJ |
1471 | /* Ignore direct disk access hint until the server supports it. */ |
1472 | flags &= ~O_DIRECT; | |
1473 | ||
36f8981f VJ |
1474 | err = v9fs_co_open2(pdu->s, fidp, fullname.data, gid, flags, mode); |
1475 | if (err < 0) { | |
1476 | goto out; | |
1477 | } | |
1478 | fidp->fid_type = P9_FID_FILE; | |
1479 | iounit = get_iounit(pdu->s, &fullname); | |
c1568af5 | 1480 | |
36f8981f VJ |
1481 | err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); |
1482 | if (err < 0) { | |
1483 | fidp->fid_type = P9_FID_NONE; | |
1484 | if (fidp->fs.fd > 0) { | |
1485 | close(fidp->fs.fd); | |
1486 | } | |
1487 | goto out; | |
1488 | } | |
1489 | v9fs_string_copy(&fidp->path, &fullname); | |
1490 | stat_to_qid(&stbuf, &qid); | |
1491 | offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit); | |
1492 | err = offset; | |
c1568af5 | 1493 | out: |
36f8981f VJ |
1494 | complete_pdu(pdu->s, pdu, err); |
1495 | v9fs_string_free(&name); | |
1496 | v9fs_string_free(&fullname); | |
c1568af5 VJJ |
1497 | } |
1498 | ||
ff06030f | 1499 | static void v9fs_fsync(void *opaque) |
b41e95d3 | 1500 | { |
4e9ad444 | 1501 | int err; |
b41e95d3 | 1502 | int32_t fid; |
4e9ad444 | 1503 | int datasync; |
b41e95d3 VJJ |
1504 | size_t offset = 7; |
1505 | V9fsFidState *fidp; | |
4e9ad444 AK |
1506 | V9fsPDU *pdu = opaque; |
1507 | V9fsState *s = pdu->s; | |
b41e95d3 | 1508 | |
49594973 | 1509 | pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); |
b41e95d3 VJJ |
1510 | fidp = lookup_fid(s, fid); |
1511 | if (fidp == NULL) { | |
1512 | err = -ENOENT; | |
4e9ad444 | 1513 | goto out; |
b41e95d3 | 1514 | } |
4e9ad444 AK |
1515 | err = v9fs_co_fsync(s, fidp, datasync); |
1516 | if (!err) { | |
1517 | err = offset; | |
1518 | } | |
1519 | out: | |
1520 | complete_pdu(s, pdu, err); | |
b41e95d3 VJJ |
1521 | } |
1522 | ||
ff06030f | 1523 | static void v9fs_clunk(void *opaque) |
a6568fe2 | 1524 | { |
c540ee51 | 1525 | int err; |
bbd5697b AL |
1526 | int32_t fid; |
1527 | size_t offset = 7; | |
c540ee51 AK |
1528 | V9fsPDU *pdu = opaque; |
1529 | V9fsState *s = pdu->s; | |
bbd5697b AL |
1530 | |
1531 | pdu_unmarshal(pdu, offset, "d", &fid); | |
bbd5697b AL |
1532 | err = free_fid(s, fid); |
1533 | if (err < 0) { | |
1534 | goto out; | |
a6568fe2 | 1535 | } |
bbd5697b AL |
1536 | err = offset; |
1537 | out: | |
1538 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1539 | } |
1540 | ||
a9231555 AL |
1541 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1542 | ||
1543 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1544 | { | |
1545 | if (err) { | |
1546 | goto out; | |
1547 | } | |
a9231555 AL |
1548 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); |
1549 | vs->offset += vs->count; | |
1550 | err = vs->offset; | |
1551 | out: | |
1552 | complete_pdu(s, vs->pdu, err); | |
7a5ca31e VJ |
1553 | v9fs_stat_free(&vs->v9stat); |
1554 | v9fs_string_free(&vs->name); | |
7267c094 | 1555 | g_free(vs); |
a9231555 AL |
1556 | return; |
1557 | } | |
1558 | ||
1559 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1560 | ssize_t err) | |
1561 | { | |
1562 | if (err) { | |
1563 | err = -errno; | |
1564 | goto out; | |
1565 | } | |
1566 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1567 | if (err) { | |
1568 | goto out; | |
1569 | } | |
1570 | ||
1571 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1572 | &vs->v9stat); | |
1573 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1574 | ((vs->count + vs->len) > vs->max_count)) { | |
d62dbb51 | 1575 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1576 | v9fs_read_post_seekdir(s, vs, err); |
1577 | return; | |
1578 | } | |
1579 | vs->count += vs->len; | |
1580 | v9fs_stat_free(&vs->v9stat); | |
1581 | v9fs_string_free(&vs->name); | |
1582 | vs->dir_pos = vs->dent->d_off; | |
5e4eaa79 | 1583 | v9fs_co_readdir(s, vs->fidp, &vs->dent); |
a9231555 AL |
1584 | v9fs_read_post_readdir(s, vs, err); |
1585 | return; | |
1586 | out: | |
d62dbb51 | 1587 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1588 | v9fs_read_post_seekdir(s, vs, err); |
1589 | return; | |
1590 | ||
1591 | } | |
1592 | ||
1593 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1594 | { | |
1595 | if (vs->dent) { | |
1596 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1597 | v9fs_string_init(&vs->name); | |
1598 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1599 | vs->dent->d_name); | |
1600 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1601 | v9fs_read_post_dir_lstat(s, vs, err); | |
1602 | return; | |
1603 | } | |
1604 | ||
1605 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1606 | vs->offset += vs->count; | |
1607 | err = vs->offset; | |
1608 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1609 | g_free(vs); |
a9231555 AL |
1610 | return; |
1611 | } | |
1612 | ||
1613 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1614 | { | |
5e4eaa79 | 1615 | v9fs_co_readdir(s, vs->fidp, &vs->dent); |
a9231555 AL |
1616 | v9fs_read_post_readdir(s, vs, err); |
1617 | return; | |
1618 | } | |
1619 | ||
1620 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1621 | ssize_t err) | |
1622 | { | |
d62dbb51 | 1623 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
a9231555 AL |
1624 | v9fs_read_post_telldir(s, vs, err); |
1625 | return; | |
1626 | } | |
1627 | ||
56d15a53 | 1628 | static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
a9231555 AL |
1629 | { |
1630 | if (err < 0) { | |
1631 | /* IO error return the error */ | |
1632 | err = -errno; | |
1633 | goto out; | |
1634 | } | |
1635 | vs->total += vs->len; | |
1636 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1637 | if (vs->total < vs->count && vs->len > 0) { | |
1638 | do { | |
1639 | if (0) { | |
1640 | print_sg(vs->sg, vs->cnt); | |
1641 | } | |
56d15a53 SG |
1642 | vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
1643 | vs->off); | |
1644 | if (vs->len > 0) { | |
1645 | vs->off += vs->len; | |
1646 | } | |
a9231555 AL |
1647 | } while (vs->len == -1 && errno == EINTR); |
1648 | if (vs->len == -1) { | |
1649 | err = -errno; | |
1650 | } | |
56d15a53 | 1651 | v9fs_read_post_preadv(s, vs, err); |
a9231555 AL |
1652 | return; |
1653 | } | |
1654 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1655 | vs->offset += vs->count; | |
1656 | err = vs->offset; | |
1657 | ||
1658 | out: | |
1659 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1660 | g_free(vs); |
a9231555 AL |
1661 | } |
1662 | ||
fa32ef88 AK |
1663 | static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
1664 | { | |
1665 | ssize_t err = 0; | |
1666 | int read_count; | |
1667 | int64_t xattr_len; | |
1668 | ||
1669 | xattr_len = vs->fidp->fs.xattr.len; | |
1670 | read_count = xattr_len - vs->off; | |
1671 | if (read_count > vs->count) { | |
1672 | read_count = vs->count; | |
1673 | } else if (read_count < 0) { | |
1674 | /* | |
1675 | * read beyond XATTR value | |
1676 | */ | |
1677 | read_count = 0; | |
1678 | } | |
1679 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count); | |
1680 | vs->offset += pdu_pack(vs->pdu, vs->offset, | |
1681 | ((char *)vs->fidp->fs.xattr.value) + vs->off, | |
1682 | read_count); | |
1683 | err = vs->offset; | |
1684 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1685 | g_free(vs); |
fa32ef88 AK |
1686 | } |
1687 | ||
ff06030f | 1688 | static void v9fs_read(void *opaque) |
9f107513 | 1689 | { |
ff06030f VJJ |
1690 | V9fsPDU *pdu = opaque; |
1691 | V9fsState *s = pdu->s; | |
a9231555 AL |
1692 | int32_t fid; |
1693 | V9fsReadState *vs; | |
1694 | ssize_t err = 0; | |
1695 | ||
7267c094 | 1696 | vs = g_malloc(sizeof(*vs)); |
a9231555 AL |
1697 | vs->pdu = pdu; |
1698 | vs->offset = 7; | |
1699 | vs->total = 0; | |
1700 | vs->len = 0; | |
1701 | vs->count = 0; | |
1702 | ||
1703 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
1704 | ||
1705 | vs->fidp = lookup_fid(s, fid); | |
1706 | if (vs->fidp == NULL) { | |
1707 | err = -EINVAL; | |
1708 | goto out; | |
1709 | } | |
1710 | ||
fa32ef88 | 1711 | if (vs->fidp->fid_type == P9_FID_DIR) { |
a9231555 AL |
1712 | vs->max_count = vs->count; |
1713 | vs->count = 0; | |
1714 | if (vs->off == 0) { | |
d62dbb51 | 1715 | v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
a9231555 AL |
1716 | } |
1717 | v9fs_read_post_rewinddir(s, vs, err); | |
1718 | return; | |
fa32ef88 | 1719 | } else if (vs->fidp->fid_type == P9_FID_FILE) { |
a9231555 AL |
1720 | vs->sg = vs->iov; |
1721 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
56d15a53 SG |
1722 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1723 | if (vs->total <= vs->count) { | |
1724 | vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, | |
1725 | vs->off); | |
1726 | if (vs->len > 0) { | |
1727 | vs->off += vs->len; | |
1728 | } | |
1729 | err = vs->len; | |
1730 | v9fs_read_post_preadv(s, vs, err); | |
1731 | } | |
a9231555 | 1732 | return; |
fa32ef88 AK |
1733 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { |
1734 | v9fs_xattr_read(s, vs); | |
1735 | return; | |
a9231555 AL |
1736 | } else { |
1737 | err = -EINVAL; | |
9f107513 | 1738 | } |
a9231555 AL |
1739 | out: |
1740 | complete_pdu(s, pdu, err); | |
7267c094 | 1741 | g_free(vs); |
9f107513 AL |
1742 | } |
1743 | ||
5e4eaa79 | 1744 | static size_t v9fs_readdir_data_size(V9fsString *name) |
c18e2f94 | 1745 | { |
5e4eaa79 AK |
1746 | /* |
1747 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
1748 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
1749 | */ | |
1750 | return 24 + v9fs_string_size(name); | |
c18e2f94 SK |
1751 | } |
1752 | ||
5e4eaa79 AK |
1753 | static int v9fs_do_readdir(V9fsState *s, V9fsPDU *pdu, |
1754 | V9fsFidState *fidp, int32_t max_count) | |
c18e2f94 | 1755 | { |
c18e2f94 | 1756 | size_t size; |
5e4eaa79 AK |
1757 | V9fsQID qid; |
1758 | V9fsString name; | |
1759 | int len, err = 0; | |
1760 | int32_t count = 0; | |
1761 | off_t saved_dir_pos; | |
1762 | struct dirent *dent; | |
c18e2f94 | 1763 | |
5e4eaa79 AK |
1764 | /* save the directory position */ |
1765 | saved_dir_pos = v9fs_co_telldir(s, fidp); | |
1766 | if (saved_dir_pos < 0) { | |
1767 | return saved_dir_pos; | |
1768 | } | |
1769 | while (1) { | |
1770 | err = v9fs_co_readdir(s, fidp, &dent); | |
1771 | if (err || !dent) { | |
1772 | break; | |
1773 | } | |
1774 | v9fs_string_init(&name); | |
1775 | v9fs_string_sprintf(&name, "%s", dent->d_name); | |
1776 | if ((count + v9fs_readdir_data_size(&name)) > max_count) { | |
c18e2f94 | 1777 | /* Ran out of buffer. Set dir back to old position and return */ |
5e4eaa79 AK |
1778 | v9fs_co_seekdir(s, fidp, saved_dir_pos); |
1779 | v9fs_string_free(&name); | |
1780 | return count; | |
c18e2f94 | 1781 | } |
5e4eaa79 AK |
1782 | /* |
1783 | * Fill up just the path field of qid because the client uses | |
c18e2f94 SK |
1784 | * only that. To fill the entire qid structure we will have |
1785 | * to stat each dirent found, which is expensive | |
1786 | */ | |
5e4eaa79 AK |
1787 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
1788 | memcpy(&qid.path, &dent->d_ino, size); | |
c18e2f94 | 1789 | /* Fill the other fields with dummy values */ |
5e4eaa79 AK |
1790 | qid.type = 0; |
1791 | qid.version = 0; | |
c18e2f94 | 1792 | |
5e4eaa79 AK |
1793 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
1794 | len = pdu_marshal(pdu, 11 + count, "Qqbs", | |
1795 | &qid, dent->d_off, | |
1796 | dent->d_type, &name); | |
1797 | count += len; | |
1798 | v9fs_string_free(&name); | |
1799 | saved_dir_pos = dent->d_off; | |
1800 | } | |
1801 | if (err < 0) { | |
1802 | return err; | |
1803 | } | |
1804 | return count; | |
c18e2f94 SK |
1805 | } |
1806 | ||
ff06030f | 1807 | static void v9fs_readdir(void *opaque) |
c18e2f94 SK |
1808 | { |
1809 | int32_t fid; | |
5e4eaa79 AK |
1810 | V9fsFidState *fidp; |
1811 | ssize_t retval = 0; | |
c18e2f94 | 1812 | size_t offset = 7; |
5e4eaa79 AK |
1813 | int64_t initial_offset; |
1814 | int32_t count, max_count; | |
1815 | V9fsPDU *pdu = opaque; | |
1816 | V9fsState *s = pdu->s; | |
c18e2f94 | 1817 | |
5e4eaa79 | 1818 | pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count); |
c18e2f94 | 1819 | |
5e4eaa79 AK |
1820 | fidp = lookup_fid(s, fid); |
1821 | if (fidp == NULL || !fidp->fs.dir) { | |
1822 | retval = -EINVAL; | |
c18e2f94 SK |
1823 | goto out; |
1824 | } | |
5e4eaa79 AK |
1825 | if (initial_offset == 0) { |
1826 | v9fs_co_rewinddir(s, fidp); | |
c18e2f94 | 1827 | } else { |
5e4eaa79 | 1828 | v9fs_co_seekdir(s, fidp, initial_offset); |
c18e2f94 | 1829 | } |
5e4eaa79 AK |
1830 | count = v9fs_do_readdir(s, pdu, fidp, max_count); |
1831 | if (count < 0) { | |
1832 | retval = count; | |
1833 | goto out; | |
1834 | } | |
1835 | retval = offset; | |
1836 | retval += pdu_marshal(pdu, offset, "d", count); | |
1837 | retval += count; | |
c18e2f94 | 1838 | out: |
5e4eaa79 | 1839 | complete_pdu(s, pdu, retval); |
c18e2f94 SK |
1840 | } |
1841 | ||
56d15a53 | 1842 | static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs, |
8449360c AL |
1843 | ssize_t err) |
1844 | { | |
1845 | if (err < 0) { | |
1846 | /* IO error return the error */ | |
1847 | err = -errno; | |
1848 | goto out; | |
1849 | } | |
1850 | vs->total += vs->len; | |
1851 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1852 | if (vs->total < vs->count && vs->len > 0) { | |
1853 | do { | |
1854 | if (0) { | |
1855 | print_sg(vs->sg, vs->cnt); | |
1856 | } | |
56d15a53 SG |
1857 | vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
1858 | vs->off); | |
1859 | if (vs->len > 0) { | |
1860 | vs->off += vs->len; | |
1861 | } | |
8449360c AL |
1862 | } while (vs->len == -1 && errno == EINTR); |
1863 | if (vs->len == -1) { | |
1864 | err = -errno; | |
1865 | } | |
56d15a53 | 1866 | v9fs_write_post_pwritev(s, vs, err); |
8449360c AL |
1867 | return; |
1868 | } | |
1869 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
8449360c AL |
1870 | err = vs->offset; |
1871 | out: | |
1872 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1873 | g_free(vs); |
8449360c AL |
1874 | } |
1875 | ||
10b468bd AK |
1876 | static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
1877 | { | |
1878 | int i, to_copy; | |
1879 | ssize_t err = 0; | |
1880 | int write_count; | |
1881 | int64_t xattr_len; | |
1882 | ||
1883 | xattr_len = vs->fidp->fs.xattr.len; | |
1884 | write_count = xattr_len - vs->off; | |
1885 | if (write_count > vs->count) { | |
1886 | write_count = vs->count; | |
1887 | } else if (write_count < 0) { | |
1888 | /* | |
1889 | * write beyond XATTR value len specified in | |
1890 | * xattrcreate | |
1891 | */ | |
1892 | err = -ENOSPC; | |
1893 | goto out; | |
1894 | } | |
1895 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count); | |
1896 | err = vs->offset; | |
1897 | vs->fidp->fs.xattr.copied_len += write_count; | |
1898 | /* | |
1899 | * Now copy the content from sg list | |
1900 | */ | |
1901 | for (i = 0; i < vs->cnt; i++) { | |
1902 | if (write_count > vs->sg[i].iov_len) { | |
1903 | to_copy = vs->sg[i].iov_len; | |
1904 | } else { | |
1905 | to_copy = write_count; | |
1906 | } | |
1907 | memcpy((char *)vs->fidp->fs.xattr.value + vs->off, | |
1908 | vs->sg[i].iov_base, to_copy); | |
1909 | /* updating vs->off since we are not using below */ | |
1910 | vs->off += to_copy; | |
1911 | write_count -= to_copy; | |
1912 | } | |
1913 | out: | |
1914 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1915 | g_free(vs); |
10b468bd AK |
1916 | } |
1917 | ||
ff06030f | 1918 | static void v9fs_write(void *opaque) |
9f107513 | 1919 | { |
ff06030f VJJ |
1920 | V9fsPDU *pdu = opaque; |
1921 | V9fsState *s = pdu->s; | |
8449360c AL |
1922 | int32_t fid; |
1923 | V9fsWriteState *vs; | |
1924 | ssize_t err; | |
1925 | ||
7267c094 | 1926 | vs = g_malloc(sizeof(*vs)); |
8449360c AL |
1927 | |
1928 | vs->pdu = pdu; | |
1929 | vs->offset = 7; | |
1930 | vs->sg = vs->iov; | |
1931 | vs->total = 0; | |
1932 | vs->len = 0; | |
1933 | ||
1934 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
10b468bd | 1935 | vs->sg, &vs->cnt); |
8449360c AL |
1936 | |
1937 | vs->fidp = lookup_fid(s, fid); | |
1938 | if (vs->fidp == NULL) { | |
1939 | err = -EINVAL; | |
1940 | goto out; | |
9f107513 | 1941 | } |
8449360c | 1942 | |
10b468bd AK |
1943 | if (vs->fidp->fid_type == P9_FID_FILE) { |
1944 | if (vs->fidp->fs.fd == -1) { | |
1945 | err = -EINVAL; | |
1946 | goto out; | |
1947 | } | |
1948 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { | |
1949 | /* | |
1950 | * setxattr operation | |
1951 | */ | |
1952 | v9fs_xattr_write(s, vs); | |
1953 | return; | |
1954 | } else { | |
8449360c AL |
1955 | err = -EINVAL; |
1956 | goto out; | |
1957 | } | |
56d15a53 SG |
1958 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1959 | if (vs->total <= vs->count) { | |
1960 | vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off); | |
1961 | if (vs->len > 0) { | |
1962 | vs->off += vs->len; | |
1963 | } | |
1964 | err = vs->len; | |
1965 | v9fs_write_post_pwritev(s, vs, err); | |
1966 | } | |
8449360c | 1967 | return; |
8449360c AL |
1968 | out: |
1969 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1970 | g_free(vs); |
9f107513 AL |
1971 | } |
1972 | ||
baaa86d9 | 1973 | static void v9fs_create(void *opaque) |
5e94c103 | 1974 | { |
baaa86d9 VJ |
1975 | int32_t fid; |
1976 | int err = 0; | |
1977 | size_t offset = 7; | |
1978 | V9fsFidState *fidp; | |
1979 | V9fsQID qid; | |
1980 | int32_t perm; | |
1981 | int8_t mode; | |
1982 | struct stat stbuf; | |
1983 | V9fsString name; | |
1984 | V9fsString extension; | |
1985 | V9fsString fullname; | |
1986 | int iounit; | |
1987 | V9fsPDU *pdu = opaque; | |
c494dd6f | 1988 | |
baaa86d9 | 1989 | v9fs_string_init(&fullname); |
c494dd6f | 1990 | |
baaa86d9 VJ |
1991 | pdu_unmarshal(pdu, offset, "dsdbs", &fid, &name, |
1992 | &perm, &mode, &extension); | |
c494dd6f | 1993 | |
baaa86d9 VJ |
1994 | fidp = lookup_fid(pdu->s, fid); |
1995 | if (fidp == NULL) { | |
1996 | err = -EINVAL; | |
c494dd6f AL |
1997 | goto out; |
1998 | } | |
1999 | ||
baaa86d9 VJ |
2000 | v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); |
2001 | err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); | |
2002 | if (!err) { | |
2003 | err = -EEXIST; | |
c494dd6f | 2004 | goto out; |
baaa86d9 | 2005 | } else if (err != -ENOENT) { |
c494dd6f AL |
2006 | goto out; |
2007 | } | |
baaa86d9 VJ |
2008 | if (perm & P9_STAT_MODE_DIR) { |
2009 | err = v9fs_co_mkdir(pdu->s, fullname.data, perm & 0777, | |
2010 | fidp->uid, -1); | |
2011 | if (err < 0) { | |
2012 | goto out; | |
2013 | } | |
2014 | err = v9fs_co_opendir(pdu->s, fidp); | |
2015 | if (err < 0) { | |
2016 | goto out; | |
2017 | } | |
2018 | fidp->fid_type = P9_FID_DIR; | |
2019 | } else if (perm & P9_STAT_MODE_SYMLINK) { | |
3fa2a8d1 | 2020 | err = v9fs_co_symlink(pdu->s, fidp, extension.data, |
baaa86d9 VJ |
2021 | fullname.data, -1); |
2022 | if (err < 0) { | |
baaa86d9 VJ |
2023 | goto out; |
2024 | } | |
2025 | } else if (perm & P9_STAT_MODE_LINK) { | |
2026 | int32_t nfid = atoi(extension.data); | |
2027 | V9fsFidState *nfidp = lookup_fid(pdu->s, nfid); | |
c494dd6f | 2028 | if (nfidp == NULL) { |
baaa86d9 VJ |
2029 | err = -EINVAL; |
2030 | goto out; | |
2031 | } | |
2032 | err = v9fs_do_link(pdu->s, &nfidp->path, &fullname); | |
2033 | if (err < 0) { | |
c494dd6f | 2034 | err = -errno; |
baaa86d9 | 2035 | goto out; |
c494dd6f | 2036 | } |
baaa86d9 | 2037 | } else if (perm & P9_STAT_MODE_DEVICE) { |
c494dd6f AL |
2038 | char ctype; |
2039 | uint32_t major, minor; | |
2040 | mode_t nmode = 0; | |
2041 | ||
baaa86d9 | 2042 | if (sscanf(extension.data, "%c %u %u", &ctype, &major, &minor) != 3) { |
c494dd6f | 2043 | err = -errno; |
baaa86d9 | 2044 | goto out; |
c494dd6f AL |
2045 | } |
2046 | ||
2047 | switch (ctype) { | |
2048 | case 'c': | |
2049 | nmode = S_IFCHR; | |
2050 | break; | |
2051 | case 'b': | |
2052 | nmode = S_IFBLK; | |
2053 | break; | |
2054 | default: | |
2055 | err = -EIO; | |
baaa86d9 VJ |
2056 | goto out; |
2057 | } | |
c1568af5 | 2058 | |
baaa86d9 VJ |
2059 | nmode |= perm & 0777; |
2060 | err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1, | |
2061 | makedev(major, minor), nmode); | |
2062 | if (err < 0) { | |
2063 | goto out; | |
2064 | } | |
2065 | } else if (perm & P9_STAT_MODE_NAMED_PIPE) { | |
2066 | err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1, | |
2067 | 0, S_IFIFO | (perm & 0777)); | |
2068 | if (err < 0) { | |
2069 | goto out; | |
2070 | } | |
2071 | } else if (perm & P9_STAT_MODE_SOCKET) { | |
2072 | err = v9fs_co_mknod(pdu->s, &fullname, fidp->uid, -1, | |
2073 | 0, S_IFSOCK | (perm & 0777)); | |
2074 | if (err < 0) { | |
2075 | goto out; | |
2076 | } | |
2077 | } else { | |
2078 | err = v9fs_co_open2(pdu->s, fidp, fullname.data, -1, | |
2079 | omode_to_uflags(mode)|O_CREAT, perm); | |
2080 | if (err < 0) { | |
2081 | goto out; | |
2082 | } | |
2083 | fidp->fid_type = P9_FID_FILE; | |
c494dd6f | 2084 | } |
baaa86d9 VJ |
2085 | err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); |
2086 | if (err < 0) { | |
2087 | fidp->fid_type = P9_FID_NONE; | |
2088 | if (fidp->fs.fd) { | |
2089 | close(fidp->fs.fd); | |
2090 | } | |
c494dd6f | 2091 | goto out; |
9f107513 | 2092 | } |
baaa86d9 VJ |
2093 | iounit = get_iounit(pdu->s, &fidp->path); |
2094 | v9fs_string_copy(&fidp->path, &fullname); | |
2095 | stat_to_qid(&stbuf, &qid); | |
2096 | offset += pdu_marshal(pdu, offset, "Qd", &qid, iounit); | |
2097 | err = offset; | |
c494dd6f | 2098 | out: |
baaa86d9 VJ |
2099 | complete_pdu(pdu->s, pdu, err); |
2100 | v9fs_string_free(&name); | |
2101 | v9fs_string_free(&extension); | |
2102 | v9fs_string_free(&fullname); | |
9f107513 AL |
2103 | } |
2104 | ||
ff06030f | 2105 | static void v9fs_symlink(void *opaque) |
08c60fc9 | 2106 | { |
ff06030f | 2107 | V9fsPDU *pdu = opaque; |
3fa2a8d1 VJ |
2108 | V9fsString name; |
2109 | V9fsString symname; | |
2110 | V9fsString fullname; | |
2111 | V9fsFidState *dfidp; | |
2112 | V9fsQID qid; | |
2113 | struct stat stbuf; | |
08c60fc9 | 2114 | int32_t dfid; |
08c60fc9 VJJ |
2115 | int err = 0; |
2116 | gid_t gid; | |
3fa2a8d1 | 2117 | size_t offset = 7; |
08c60fc9 | 2118 | |
3fa2a8d1 VJ |
2119 | v9fs_string_init(&fullname); |
2120 | pdu_unmarshal(pdu, offset, "dssd", &dfid, &name, &symname, &gid); | |
08c60fc9 | 2121 | |
3fa2a8d1 VJ |
2122 | dfidp = lookup_fid(pdu->s, dfid); |
2123 | if (dfidp == NULL) { | |
08c60fc9 VJJ |
2124 | err = -EINVAL; |
2125 | goto out; | |
2126 | } | |
2127 | ||
3fa2a8d1 VJ |
2128 | v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data); |
2129 | err = v9fs_co_symlink(pdu->s, dfidp, symname.data, fullname.data, gid); | |
2130 | if (err < 0) { | |
2131 | goto out; | |
2132 | } | |
2133 | err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); | |
2134 | if (err < 0) { | |
2135 | goto out; | |
2136 | } | |
2137 | stat_to_qid(&stbuf, &qid); | |
2138 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
2139 | err = offset; | |
08c60fc9 | 2140 | out: |
3fa2a8d1 VJ |
2141 | complete_pdu(pdu->s, pdu, err); |
2142 | v9fs_string_free(&name); | |
2143 | v9fs_string_free(&symname); | |
2144 | v9fs_string_free(&fullname); | |
08c60fc9 VJJ |
2145 | } |
2146 | ||
ff06030f | 2147 | static void v9fs_flush(void *opaque) |
9f107513 | 2148 | { |
ff06030f VJJ |
2149 | V9fsPDU *pdu = opaque; |
2150 | V9fsState *s = pdu->s; | |
9c5e9d89 AL |
2151 | /* A nop call with no return */ |
2152 | complete_pdu(s, pdu, 7); | |
ff06030f | 2153 | return; |
9f107513 AL |
2154 | } |
2155 | ||
ff06030f | 2156 | static void v9fs_link(void *opaque) |
b2c224be | 2157 | { |
ff06030f VJJ |
2158 | V9fsPDU *pdu = opaque; |
2159 | V9fsState *s = pdu->s; | |
b2c224be VJJ |
2160 | int32_t dfid, oldfid; |
2161 | V9fsFidState *dfidp, *oldfidp; | |
2162 | V9fsString name, fullname; | |
2163 | size_t offset = 7; | |
2164 | int err = 0; | |
2165 | ||
2166 | v9fs_string_init(&fullname); | |
2167 | ||
2168 | pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2169 | ||
2170 | dfidp = lookup_fid(s, dfid); | |
2171 | if (dfidp == NULL) { | |
2172 | err = -errno; | |
2173 | goto out; | |
2174 | } | |
2175 | ||
2176 | oldfidp = lookup_fid(s, oldfid); | |
2177 | if (oldfidp == NULL) { | |
2178 | err = -errno; | |
2179 | goto out; | |
2180 | } | |
2181 | ||
2182 | v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data); | |
2183 | err = offset; | |
2184 | err = v9fs_do_link(s, &oldfidp->path, &fullname); | |
2185 | if (err) { | |
2186 | err = -errno; | |
2187 | } | |
2188 | v9fs_string_free(&fullname); | |
2189 | ||
2190 | out: | |
2191 | v9fs_string_free(&name); | |
2192 | complete_pdu(s, pdu, err); | |
2193 | } | |
2194 | ||
ff06030f | 2195 | static void v9fs_remove(void *opaque) |
9f107513 | 2196 | { |
5bae1900 | 2197 | int32_t fid; |
5bae1900 | 2198 | int err = 0; |
ae1ef571 VJ |
2199 | size_t offset = 7; |
2200 | V9fsFidState *fidp; | |
2201 | V9fsPDU *pdu = opaque; | |
5bae1900 | 2202 | |
ae1ef571 | 2203 | pdu_unmarshal(pdu, offset, "d", &fid); |
5bae1900 | 2204 | |
ae1ef571 VJ |
2205 | fidp = lookup_fid(pdu->s, fid); |
2206 | if (fidp == NULL) { | |
5bae1900 AL |
2207 | err = -EINVAL; |
2208 | goto out; | |
9f107513 | 2209 | } |
ae1ef571 VJ |
2210 | err = v9fs_co_remove(pdu->s, &fidp->path); |
2211 | if (!err) { | |
2212 | err = offset; | |
2213 | } | |
5bae1900 | 2214 | |
ae1ef571 VJ |
2215 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
2216 | free_fid(pdu->s, fidp->fid); | |
5bae1900 | 2217 | out: |
ae1ef571 | 2218 | complete_pdu(pdu->s, pdu, err); |
9f107513 AL |
2219 | } |
2220 | ||
8cf89e00 AL |
2221 | static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2222 | { | |
2223 | if (err < 0) { | |
2224 | goto out; | |
2225 | } | |
2226 | ||
2227 | err = vs->offset; | |
2228 | ||
2229 | out: | |
2230 | v9fs_stat_free(&vs->v9stat); | |
2231 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2232 | g_free(vs); |
8cf89e00 AL |
2233 | } |
2234 | ||
2235 | static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) | |
2236 | { | |
2237 | if (err < 0) { | |
2238 | goto out; | |
2239 | } | |
8cf89e00 AL |
2240 | if (vs->v9stat.length != -1) { |
2241 | if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { | |
2242 | err = -errno; | |
2243 | } | |
2244 | } | |
2245 | v9fs_wstat_post_truncate(s, vs, err); | |
2246 | return; | |
2247 | ||
2248 | out: | |
2249 | v9fs_stat_free(&vs->v9stat); | |
2250 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2251 | g_free(vs); |
8cf89e00 AL |
2252 | } |
2253 | ||
930b1e17 AK |
2254 | static int v9fs_complete_rename(V9fsState *s, V9fsFidState *fidp, |
2255 | int32_t newdirfid, V9fsString *name) | |
8cf89e00 | 2256 | { |
930b1e17 | 2257 | char *end; |
c7b4b0b3 MK |
2258 | int err = 0; |
2259 | char *old_name, *new_name; | |
8cf89e00 | 2260 | |
930b1e17 | 2261 | if (newdirfid != -1) { |
c7b4b0b3 | 2262 | V9fsFidState *dirfidp; |
930b1e17 | 2263 | dirfidp = lookup_fid(s, newdirfid); |
c7b4b0b3 MK |
2264 | if (dirfidp == NULL) { |
2265 | err = -ENOENT; | |
2266 | goto out; | |
2267 | } | |
d62dbb51 | 2268 | BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
8cf89e00 | 2269 | |
7267c094 | 2270 | new_name = g_malloc0(dirfidp->path.size + name->size + 2); |
c7b4b0b3 MK |
2271 | |
2272 | strcpy(new_name, dirfidp->path.data); | |
2273 | strcat(new_name, "/"); | |
930b1e17 | 2274 | strcat(new_name + dirfidp->path.size, name->data); |
c7b4b0b3 | 2275 | } else { |
930b1e17 | 2276 | old_name = fidp->path.data; |
8cf89e00 AL |
2277 | end = strrchr(old_name, '/'); |
2278 | if (end) { | |
2279 | end++; | |
2280 | } else { | |
2281 | end = old_name; | |
2282 | } | |
7267c094 | 2283 | new_name = g_malloc0(end - old_name + name->size + 1); |
8cf89e00 | 2284 | |
c7b4b0b3 | 2285 | strncat(new_name, old_name, end - old_name); |
930b1e17 | 2286 | strncat(new_name + (end - old_name), name->data, name->size); |
c7b4b0b3 | 2287 | } |
8cf89e00 | 2288 | |
930b1e17 AK |
2289 | v9fs_string_free(name); |
2290 | name->data = new_name; | |
2291 | name->size = strlen(new_name); | |
8cf89e00 | 2292 | |
930b1e17 AK |
2293 | if (strcmp(new_name, fidp->path.data) != 0) { |
2294 | err = v9fs_co_rename(s, &fidp->path, name); | |
2295 | if (err < 0) { | |
2296 | goto out; | |
2297 | } | |
2298 | V9fsFidState *tfidp; | |
2299 | /* | |
2300 | * Fixup fid's pointing to the old name to | |
2301 | * start pointing to the new name | |
2302 | */ | |
2303 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
2304 | if (fidp == tfidp) { | |
2305 | /* | |
2306 | * we replace name of this fid towards the end | |
2307 | * so that our below strcmp will work | |
2308 | */ | |
2309 | continue; | |
2310 | } | |
2311 | if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { | |
2312 | /* replace the name */ | |
2313 | v9fs_fix_path(&tfidp->path, name, strlen(fidp->path.data)); | |
8cf89e00 AL |
2314 | } |
2315 | } | |
930b1e17 | 2316 | v9fs_string_copy(&fidp->path, name); |
8cf89e00 | 2317 | } |
c7b4b0b3 | 2318 | out: |
c7b4b0b3 MK |
2319 | return err; |
2320 | } | |
2321 | ||
c7b4b0b3 MK |
2322 | static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
2323 | { | |
2324 | if (err < 0) { | |
2325 | goto out; | |
2326 | } | |
2327 | ||
2328 | if (vs->v9stat.name.size != 0) { | |
930b1e17 | 2329 | err = v9fs_complete_rename(s, vs->fidp, -1, &vs->v9stat.name); |
c7b4b0b3 | 2330 | } |
8cf89e00 AL |
2331 | v9fs_wstat_post_rename(s, vs, err); |
2332 | return; | |
2333 | ||
2334 | out: | |
2335 | v9fs_stat_free(&vs->v9stat); | |
2336 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2337 | g_free(vs); |
8cf89e00 AL |
2338 | } |
2339 | ||
ff06030f | 2340 | static void v9fs_rename(void *opaque) |
c7b4b0b3 MK |
2341 | { |
2342 | int32_t fid; | |
c7b4b0b3 | 2343 | ssize_t err = 0; |
930b1e17 AK |
2344 | size_t offset = 7; |
2345 | V9fsString name; | |
2346 | int32_t newdirfid; | |
2347 | V9fsFidState *fidp; | |
2348 | V9fsPDU *pdu = opaque; | |
2349 | V9fsState *s = pdu->s; | |
c7b4b0b3 | 2350 | |
930b1e17 | 2351 | pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); |
c7b4b0b3 | 2352 | |
930b1e17 AK |
2353 | fidp = lookup_fid(s, fid); |
2354 | if (fidp == NULL) { | |
c7b4b0b3 MK |
2355 | err = -ENOENT; |
2356 | goto out; | |
2357 | } | |
930b1e17 | 2358 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
c7b4b0b3 | 2359 | |
930b1e17 AK |
2360 | err = v9fs_complete_rename(s, fidp, newdirfid, &name); |
2361 | if (!err) { | |
2362 | err = offset; | |
2363 | } | |
c7b4b0b3 | 2364 | out: |
930b1e17 AK |
2365 | complete_pdu(s, pdu, err); |
2366 | v9fs_string_free(&name); | |
c7b4b0b3 MK |
2367 | } |
2368 | ||
8cf89e00 AL |
2369 | static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2370 | { | |
2371 | if (err < 0) { | |
2372 | goto out; | |
2373 | } | |
2374 | ||
f7613bee | 2375 | if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
8cf89e00 AL |
2376 | if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid, |
2377 | vs->v9stat.n_gid)) { | |
2378 | err = -errno; | |
2379 | } | |
2380 | } | |
2381 | v9fs_wstat_post_chown(s, vs, err); | |
2382 | return; | |
2383 | ||
2384 | out: | |
2385 | v9fs_stat_free(&vs->v9stat); | |
2386 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2387 | g_free(vs); |
8cf89e00 AL |
2388 | } |
2389 | ||
2390 | static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) | |
2391 | { | |
2392 | if (err < 0) { | |
2393 | goto out; | |
2394 | } | |
2395 | ||
74bc02b2 | 2396 | if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
8fc39ae4 SK |
2397 | struct timespec times[2]; |
2398 | if (vs->v9stat.atime != -1) { | |
2399 | times[0].tv_sec = vs->v9stat.atime; | |
2400 | times[0].tv_nsec = 0; | |
2401 | } else { | |
2402 | times[0].tv_nsec = UTIME_OMIT; | |
2403 | } | |
2404 | if (vs->v9stat.mtime != -1) { | |
2405 | times[1].tv_sec = vs->v9stat.mtime; | |
2406 | times[1].tv_nsec = 0; | |
2407 | } else { | |
2408 | times[1].tv_nsec = UTIME_OMIT; | |
2409 | } | |
2410 | ||
2411 | if (v9fs_do_utimensat(s, &vs->fidp->path, times)) { | |
8cf89e00 AL |
2412 | err = -errno; |
2413 | } | |
2414 | } | |
2415 | ||
2416 | v9fs_wstat_post_utime(s, vs, err); | |
2417 | return; | |
2418 | ||
2419 | out: | |
2420 | v9fs_stat_free(&vs->v9stat); | |
2421 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2422 | g_free(vs); |
8cf89e00 AL |
2423 | } |
2424 | ||
2425 | static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) | |
2426 | { | |
2427 | if (err == -1) { | |
2428 | err = -errno; | |
2429 | } | |
2430 | v9fs_stat_free(&vs->v9stat); | |
2431 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2432 | g_free(vs); |
8cf89e00 AL |
2433 | } |
2434 | ||
2435 | static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) | |
2436 | { | |
2437 | uint32_t v9_mode; | |
2438 | ||
2439 | if (err == -1) { | |
2440 | err = -errno; | |
2441 | goto out; | |
2442 | } | |
2443 | ||
2444 | v9_mode = stat_to_v9mode(&vs->stbuf); | |
2445 | ||
2446 | if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2447 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2448 | /* Attempting to change the type */ | |
2449 | err = -EIO; | |
2450 | goto out; | |
2451 | } | |
2452 | ||
2453 | if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode, | |
2454 | &vs->v9stat.extension))) { | |
2455 | err = -errno; | |
2456 | } | |
2457 | v9fs_wstat_post_chmod(s, vs, err); | |
2458 | return; | |
2459 | ||
2460 | out: | |
2461 | v9fs_stat_free(&vs->v9stat); | |
2462 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2463 | g_free(vs); |
8cf89e00 AL |
2464 | } |
2465 | ||
ff06030f | 2466 | static void v9fs_wstat(void *opaque) |
9f107513 | 2467 | { |
ff06030f VJJ |
2468 | V9fsPDU *pdu = opaque; |
2469 | V9fsState *s = pdu->s; | |
8cf89e00 AL |
2470 | int32_t fid; |
2471 | V9fsWstatState *vs; | |
2472 | int err = 0; | |
2473 | ||
7267c094 | 2474 | vs = g_malloc(sizeof(*vs)); |
8cf89e00 AL |
2475 | vs->pdu = pdu; |
2476 | vs->offset = 7; | |
2477 | ||
2478 | pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat); | |
2479 | ||
2480 | vs->fidp = lookup_fid(s, fid); | |
2481 | if (vs->fidp == NULL) { | |
2482 | err = -EINVAL; | |
2483 | goto out; | |
9f107513 | 2484 | } |
8cf89e00 AL |
2485 | |
2486 | /* do we need to sync the file? */ | |
2487 | if (donttouch_stat(&vs->v9stat)) { | |
49594973 | 2488 | err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0); |
8cf89e00 AL |
2489 | v9fs_wstat_post_fsync(s, vs, err); |
2490 | return; | |
2491 | } | |
2492 | ||
2493 | if (vs->v9stat.mode != -1) { | |
2494 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
2495 | v9fs_wstat_post_lstat(s, vs, err); | |
2496 | return; | |
2497 | } | |
2498 | ||
2499 | v9fs_wstat_post_chmod(s, vs, err); | |
2500 | return; | |
2501 | ||
2502 | out: | |
2503 | v9fs_stat_free(&vs->v9stat); | |
2504 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2505 | g_free(vs); |
9f107513 AL |
2506 | } |
2507 | ||
88a4763e AK |
2508 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2509 | { | |
2510 | uint32_t f_type; | |
2511 | uint32_t f_bsize; | |
2512 | uint64_t f_blocks; | |
2513 | uint64_t f_bfree; | |
2514 | uint64_t f_bavail; | |
2515 | uint64_t f_files; | |
2516 | uint64_t f_ffree; | |
2517 | uint64_t fsid_val; | |
2518 | uint32_t f_namelen; | |
2519 | size_t offset = 7; | |
5e94c103 MK |
2520 | int32_t bsize_factor; |
2521 | ||
5e94c103 MK |
2522 | /* |
2523 | * compute bsize factor based on host file system block size | |
2524 | * and client msize | |
2525 | */ | |
88a4763e | 2526 | bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
5e94c103 MK |
2527 | if (!bsize_factor) { |
2528 | bsize_factor = 1; | |
2529 | } | |
88a4763e AK |
2530 | f_type = stbuf->f_type; |
2531 | f_bsize = stbuf->f_bsize; | |
2532 | f_bsize *= bsize_factor; | |
5e94c103 MK |
2533 | /* |
2534 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
2535 | * adjust(divide) the number of blocks, free blocks and available | |
2536 | * blocks by bsize factor | |
2537 | */ | |
88a4763e AK |
2538 | f_blocks = stbuf->f_blocks/bsize_factor; |
2539 | f_bfree = stbuf->f_bfree/bsize_factor; | |
2540 | f_bavail = stbuf->f_bavail/bsize_factor; | |
2541 | f_files = stbuf->f_files; | |
2542 | f_ffree = stbuf->f_ffree; | |
2543 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | | |
2544 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; | |
2545 | f_namelen = stbuf->f_namelen; | |
be940c87 | 2546 | |
88a4763e AK |
2547 | return pdu_marshal(pdu, offset, "ddqqqqqqd", |
2548 | f_type, f_bsize, f_blocks, f_bfree, | |
2549 | f_bavail, f_files, f_ffree, | |
2550 | fsid_val, f_namelen); | |
be940c87 MK |
2551 | } |
2552 | ||
ff06030f | 2553 | static void v9fs_statfs(void *opaque) |
be940c87 | 2554 | { |
88a4763e AK |
2555 | int32_t fid; |
2556 | ssize_t retval = 0; | |
2557 | size_t offset = 7; | |
2558 | V9fsFidState *fidp; | |
2559 | struct statfs stbuf; | |
ff06030f VJJ |
2560 | V9fsPDU *pdu = opaque; |
2561 | V9fsState *s = pdu->s; | |
be940c87 | 2562 | |
88a4763e AK |
2563 | pdu_unmarshal(pdu, offset, "d", &fid); |
2564 | fidp = lookup_fid(s, fid); | |
2565 | if (fidp == NULL) { | |
2566 | retval = -ENOENT; | |
be940c87 MK |
2567 | goto out; |
2568 | } | |
88a4763e AK |
2569 | retval = v9fs_co_statfs(s, &fidp->path, &stbuf); |
2570 | if (retval < 0) { | |
2571 | goto out; | |
2572 | } | |
2573 | retval = offset; | |
2574 | retval += v9fs_fill_statfs(s, pdu, &stbuf); | |
be940c87 | 2575 | out: |
88a4763e | 2576 | complete_pdu(s, pdu, retval); |
ff06030f | 2577 | return; |
be940c87 MK |
2578 | } |
2579 | ||
ff06030f | 2580 | static void v9fs_mknod(void *opaque) |
5268cecc | 2581 | { |
1b733fed AK |
2582 | |
2583 | int mode; | |
2584 | gid_t gid; | |
5268cecc | 2585 | int32_t fid; |
1b733fed | 2586 | V9fsQID qid; |
5268cecc | 2587 | int err = 0; |
5268cecc | 2588 | int major, minor; |
1b733fed AK |
2589 | size_t offset = 7; |
2590 | V9fsString name; | |
2591 | struct stat stbuf; | |
2592 | V9fsString fullname; | |
2593 | V9fsFidState *fidp; | |
2594 | V9fsPDU *pdu = opaque; | |
2595 | V9fsState *s = pdu->s; | |
5268cecc | 2596 | |
1b733fed AK |
2597 | v9fs_string_init(&fullname); |
2598 | pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, | |
2599 | &major, &minor, &gid); | |
5268cecc MK |
2600 | |
2601 | fidp = lookup_fid(s, fid); | |
2602 | if (fidp == NULL) { | |
2603 | err = -ENOENT; | |
2604 | goto out; | |
2605 | } | |
1b733fed AK |
2606 | v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); |
2607 | err = v9fs_co_mknod(s, &fullname, fidp->uid, gid, | |
2608 | makedev(major, minor), mode); | |
2609 | if (err < 0) { | |
2610 | goto out; | |
2611 | } | |
2612 | err = v9fs_co_lstat(s, &fullname, &stbuf); | |
2613 | if (err < 0) { | |
2614 | goto out; | |
2615 | } | |
2616 | stat_to_qid(&stbuf, &qid); | |
2617 | err = offset; | |
2618 | err += pdu_marshal(pdu, offset, "Q", &qid); | |
5268cecc | 2619 | out: |
1b733fed AK |
2620 | complete_pdu(s, pdu, err); |
2621 | v9fs_string_free(&fullname); | |
2622 | v9fs_string_free(&name); | |
5268cecc MK |
2623 | } |
2624 | ||
82cc3ee8 MK |
2625 | /* |
2626 | * Implement posix byte range locking code | |
2627 | * Server side handling of locking code is very simple, because 9p server in | |
2628 | * QEMU can handle only one client. And most of the lock handling | |
2629 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to | |
2630 | * do any thing in * qemu 9p server side lock code path. | |
2631 | * So when a TLOCK request comes, always return success | |
2632 | */ | |
ff06030f | 2633 | static void v9fs_lock(void *opaque) |
82cc3ee8 | 2634 | { |
0c27bf2a AK |
2635 | int8_t status; |
2636 | V9fsFlock *flock; | |
2637 | size_t offset = 7; | |
2638 | struct stat stbuf; | |
2639 | V9fsFidState *fidp; | |
2640 | int32_t fid, err = 0; | |
ff06030f VJJ |
2641 | V9fsPDU *pdu = opaque; |
2642 | V9fsState *s = pdu->s; | |
82cc3ee8 | 2643 | |
0c27bf2a AK |
2644 | flock = g_malloc(sizeof(*flock)); |
2645 | pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock->type, | |
2646 | &flock->flags, &flock->start, &flock->length, | |
2647 | &flock->proc_id, &flock->client_id); | |
2648 | status = P9_LOCK_ERROR; | |
82cc3ee8 MK |
2649 | |
2650 | /* We support only block flag now (that too ignored currently) */ | |
0c27bf2a | 2651 | if (flock->flags & ~P9_LOCK_FLAGS_BLOCK) { |
82cc3ee8 MK |
2652 | err = -EINVAL; |
2653 | goto out; | |
2654 | } | |
0c27bf2a AK |
2655 | fidp = lookup_fid(s, fid); |
2656 | if (fidp == NULL) { | |
82cc3ee8 MK |
2657 | err = -ENOENT; |
2658 | goto out; | |
2659 | } | |
0c27bf2a | 2660 | err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); |
82cc3ee8 | 2661 | if (err < 0) { |
82cc3ee8 MK |
2662 | goto out; |
2663 | } | |
0c27bf2a | 2664 | status = P9_LOCK_SUCCESS; |
82cc3ee8 | 2665 | out: |
0c27bf2a AK |
2666 | err = offset; |
2667 | err += pdu_marshal(pdu, offset, "b", status); | |
2668 | complete_pdu(s, pdu, err); | |
2669 | g_free(flock); | |
82cc3ee8 MK |
2670 | } |
2671 | ||
8f354003 MK |
2672 | /* |
2673 | * When a TGETLOCK request comes, always return success because all lock | |
2674 | * handling is done by client's VFS layer. | |
2675 | */ | |
ff06030f | 2676 | static void v9fs_getlock(void *opaque) |
8f354003 | 2677 | { |
e4e414a4 AK |
2678 | size_t offset = 7; |
2679 | struct stat stbuf; | |
2680 | V9fsFidState *fidp; | |
2681 | V9fsGetlock *glock; | |
2682 | int32_t fid, err = 0; | |
ff06030f VJJ |
2683 | V9fsPDU *pdu = opaque; |
2684 | V9fsState *s = pdu->s; | |
8f354003 | 2685 | |
e4e414a4 AK |
2686 | glock = g_malloc(sizeof(*glock)); |
2687 | pdu_unmarshal(pdu, offset, "dbqqds", &fid, &glock->type, | |
2688 | &glock->start, &glock->length, &glock->proc_id, | |
2689 | &glock->client_id); | |
8f354003 | 2690 | |
e4e414a4 AK |
2691 | fidp = lookup_fid(s, fid); |
2692 | if (fidp == NULL) { | |
8f354003 MK |
2693 | err = -ENOENT; |
2694 | goto out; | |
2695 | } | |
e4e414a4 | 2696 | err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); |
8f354003 | 2697 | if (err < 0) { |
8f354003 MK |
2698 | goto out; |
2699 | } | |
e4e414a4 AK |
2700 | glock->type = F_UNLCK; |
2701 | offset += pdu_marshal(pdu, offset, "bqqds", glock->type, | |
2702 | glock->start, glock->length, glock->proc_id, | |
2703 | &glock->client_id); | |
2704 | err = offset; | |
8f354003 | 2705 | out: |
e4e414a4 AK |
2706 | complete_pdu(s, pdu, err); |
2707 | g_free(glock); | |
8f354003 MK |
2708 | } |
2709 | ||
ff06030f | 2710 | static void v9fs_mkdir(void *opaque) |
b67592ea | 2711 | { |
ff06030f | 2712 | V9fsPDU *pdu = opaque; |
e84861f7 | 2713 | size_t offset = 7; |
b67592ea | 2714 | int32_t fid; |
e84861f7 VJ |
2715 | struct stat stbuf; |
2716 | V9fsString name, fullname; | |
2717 | V9fsQID qid; | |
b67592ea MK |
2718 | V9fsFidState *fidp; |
2719 | gid_t gid; | |
2720 | int mode; | |
e84861f7 | 2721 | int err = 0; |
b67592ea | 2722 | |
e84861f7 VJ |
2723 | v9fs_string_init(&fullname); |
2724 | pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); | |
b67592ea | 2725 | |
e84861f7 | 2726 | fidp = lookup_fid(pdu->s, fid); |
b67592ea MK |
2727 | if (fidp == NULL) { |
2728 | err = -ENOENT; | |
2729 | goto out; | |
2730 | } | |
e84861f7 VJ |
2731 | v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); |
2732 | err = v9fs_co_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid); | |
2733 | if (err < 0) { | |
2734 | goto out; | |
2735 | } | |
2736 | err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); | |
2737 | if (err < 0) { | |
2738 | goto out; | |
2739 | } | |
2740 | stat_to_qid(&stbuf, &qid); | |
2741 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
2742 | err = offset; | |
b67592ea | 2743 | out: |
e84861f7 VJ |
2744 | complete_pdu(pdu->s, pdu, err); |
2745 | v9fs_string_free(&fullname); | |
2746 | v9fs_string_free(&name); | |
b67592ea MK |
2747 | } |
2748 | ||
ff06030f | 2749 | static void v9fs_xattrwalk(void *opaque) |
fa32ef88 | 2750 | { |
670185a6 AK |
2751 | int64_t size; |
2752 | V9fsString name; | |
fa32ef88 | 2753 | ssize_t err = 0; |
670185a6 | 2754 | size_t offset = 7; |
fa32ef88 | 2755 | int32_t fid, newfid; |
670185a6 AK |
2756 | V9fsFidState *file_fidp; |
2757 | V9fsFidState *xattr_fidp; | |
2758 | V9fsPDU *pdu = opaque; | |
2759 | V9fsState *s = pdu->s; | |
fa32ef88 | 2760 | |
670185a6 AK |
2761 | pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); |
2762 | file_fidp = lookup_fid(s, fid); | |
2763 | if (file_fidp == NULL) { | |
fa32ef88 AK |
2764 | err = -ENOENT; |
2765 | goto out; | |
2766 | } | |
670185a6 AK |
2767 | xattr_fidp = alloc_fid(s, newfid); |
2768 | if (xattr_fidp == NULL) { | |
fa32ef88 AK |
2769 | err = -EINVAL; |
2770 | goto out; | |
2771 | } | |
670185a6 AK |
2772 | v9fs_string_copy(&xattr_fidp->path, &file_fidp->path); |
2773 | if (name.data[0] == 0) { | |
fa32ef88 AK |
2774 | /* |
2775 | * listxattr request. Get the size first | |
2776 | */ | |
670185a6 AK |
2777 | size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0); |
2778 | if (size < 0) { | |
2779 | err = size; | |
2780 | free_fid(s, xattr_fidp->fid); | |
2781 | goto out; | |
fa32ef88 | 2782 | } |
670185a6 AK |
2783 | /* |
2784 | * Read the xattr value | |
2785 | */ | |
2786 | xattr_fidp->fs.xattr.len = size; | |
2787 | xattr_fidp->fid_type = P9_FID_XATTR; | |
2788 | xattr_fidp->fs.xattr.copied_len = -1; | |
2789 | if (size) { | |
7267c094 | 2790 | xattr_fidp->fs.xattr.value = g_malloc(size); |
670185a6 AK |
2791 | err = v9fs_co_llistxattr(s, &xattr_fidp->path, |
2792 | xattr_fidp->fs.xattr.value, | |
2793 | xattr_fidp->fs.xattr.len); | |
2794 | if (err < 0) { | |
2795 | free_fid(s, xattr_fidp->fid); | |
2796 | goto out; | |
2797 | } | |
2798 | } | |
2799 | offset += pdu_marshal(pdu, offset, "q", size); | |
2800 | err = offset; | |
fa32ef88 AK |
2801 | } else { |
2802 | /* | |
2803 | * specific xattr fid. We check for xattr | |
2804 | * presence also collect the xattr size | |
2805 | */ | |
670185a6 AK |
2806 | size = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
2807 | &name, NULL, 0); | |
2808 | if (size < 0) { | |
2809 | err = size; | |
2810 | free_fid(s, xattr_fidp->fid); | |
2811 | goto out; | |
fa32ef88 | 2812 | } |
670185a6 AK |
2813 | /* |
2814 | * Read the xattr value | |
2815 | */ | |
2816 | xattr_fidp->fs.xattr.len = size; | |
2817 | xattr_fidp->fid_type = P9_FID_XATTR; | |
2818 | xattr_fidp->fs.xattr.copied_len = -1; | |
2819 | if (size) { | |
7267c094 | 2820 | xattr_fidp->fs.xattr.value = g_malloc(size); |
670185a6 AK |
2821 | err = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
2822 | &name, xattr_fidp->fs.xattr.value, | |
2823 | xattr_fidp->fs.xattr.len); | |
2824 | if (err < 0) { | |
2825 | free_fid(s, xattr_fidp->fid); | |
2826 | goto out; | |
2827 | } | |
2828 | } | |
2829 | offset += pdu_marshal(pdu, offset, "q", size); | |
2830 | err = offset; | |
fa32ef88 AK |
2831 | } |
2832 | out: | |
670185a6 AK |
2833 | complete_pdu(s, pdu, err); |
2834 | v9fs_string_free(&name); | |
fa32ef88 AK |
2835 | } |
2836 | ||
ff06030f | 2837 | static void v9fs_xattrcreate(void *opaque) |
10b468bd AK |
2838 | { |
2839 | int flags; | |
2840 | int32_t fid; | |
f10ff58d | 2841 | int64_t size; |
10b468bd | 2842 | ssize_t err = 0; |
f10ff58d AK |
2843 | V9fsString name; |
2844 | size_t offset = 7; | |
2845 | V9fsFidState *file_fidp; | |
2846 | V9fsFidState *xattr_fidp; | |
2847 | V9fsPDU *pdu = opaque; | |
2848 | V9fsState *s = pdu->s; | |
10b468bd | 2849 | |
f10ff58d AK |
2850 | pdu_unmarshal(pdu, offset, "dsqd", |
2851 | &fid, &name, &size, &flags); | |
10b468bd | 2852 | |
f10ff58d AK |
2853 | file_fidp = lookup_fid(s, fid); |
2854 | if (file_fidp == NULL) { | |
10b468bd AK |
2855 | err = -EINVAL; |
2856 | goto out; | |
2857 | } | |
10b468bd | 2858 | /* Make the file fid point to xattr */ |
f10ff58d AK |
2859 | xattr_fidp = file_fidp; |
2860 | xattr_fidp->fid_type = P9_FID_XATTR; | |
2861 | xattr_fidp->fs.xattr.copied_len = 0; | |
2862 | xattr_fidp->fs.xattr.len = size; | |
2863 | xattr_fidp->fs.xattr.flags = flags; | |
2864 | v9fs_string_init(&xattr_fidp->fs.xattr.name); | |
2865 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); | |
2866 | if (size) { | |
7267c094 | 2867 | xattr_fidp->fs.xattr.value = g_malloc(size); |
f10ff58d AK |
2868 | } else { |
2869 | xattr_fidp->fs.xattr.value = NULL; | |
2870 | } | |
2871 | err = offset; | |
10b468bd | 2872 | out: |
f10ff58d AK |
2873 | complete_pdu(s, pdu, err); |
2874 | v9fs_string_free(&name); | |
10b468bd | 2875 | } |
fa32ef88 | 2876 | |
ff06030f | 2877 | static void v9fs_readlink(void *opaque) |
df0973a4 | 2878 | { |
ff06030f | 2879 | V9fsPDU *pdu = opaque; |
7a5ca31e VJ |
2880 | size_t offset = 7; |
2881 | V9fsString target; | |
df0973a4 | 2882 | int32_t fid; |
df0973a4 MK |
2883 | int err = 0; |
2884 | V9fsFidState *fidp; | |
2885 | ||
7a5ca31e VJ |
2886 | pdu_unmarshal(pdu, offset, "d", &fid); |
2887 | fidp = lookup_fid(pdu->s, fid); | |
df0973a4 MK |
2888 | if (fidp == NULL) { |
2889 | err = -ENOENT; | |
2890 | goto out; | |
2891 | } | |
2892 | ||
7a5ca31e VJ |
2893 | v9fs_string_init(&target); |
2894 | err = v9fs_co_readlink(pdu->s, &fidp->path, &target); | |
2895 | if (err < 0) { | |
2896 | goto out; | |
2897 | } | |
2898 | offset += pdu_marshal(pdu, offset, "s", &target); | |
2899 | err = offset; | |
2900 | v9fs_string_free(&target); | |
df0973a4 | 2901 | out: |
7a5ca31e | 2902 | complete_pdu(pdu->s, pdu, err); |
df0973a4 MK |
2903 | } |
2904 | ||
ff06030f | 2905 | static CoroutineEntry *pdu_co_handlers[] = { |
c18e2f94 | 2906 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 2907 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 2908 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 2909 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 2910 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 2911 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 2912 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 2913 | [P9_TRENAME] = v9fs_rename, |
82cc3ee8 | 2914 | [P9_TLOCK] = v9fs_lock, |
8f354003 | 2915 | [P9_TGETLOCK] = v9fs_getlock, |
df0973a4 | 2916 | [P9_TREADLINK] = v9fs_readlink, |
b67592ea | 2917 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 2918 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 2919 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
2920 | [P9_TATTACH] = v9fs_attach, |
2921 | [P9_TSTAT] = v9fs_stat, | |
2922 | [P9_TWALK] = v9fs_walk, | |
2923 | [P9_TCLUNK] = v9fs_clunk, | |
b41e95d3 | 2924 | [P9_TFSYNC] = v9fs_fsync, |
9f107513 AL |
2925 | [P9_TOPEN] = v9fs_open, |
2926 | [P9_TREAD] = v9fs_read, | |
2927 | #if 0 | |
2928 | [P9_TAUTH] = v9fs_auth, | |
2929 | #endif | |
2930 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 2931 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 2932 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 2933 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 2934 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
2935 | [P9_TWRITE] = v9fs_write, |
2936 | [P9_TWSTAT] = v9fs_wstat, | |
2937 | [P9_TREMOVE] = v9fs_remove, | |
2938 | }; | |
2939 | ||
ff06030f | 2940 | static void v9fs_op_not_supp(void *opaque) |
5c3234c6 | 2941 | { |
ff06030f VJJ |
2942 | V9fsPDU *pdu = opaque; |
2943 | complete_pdu(pdu->s, pdu, -EOPNOTSUPP); | |
5c3234c6 AK |
2944 | } |
2945 | ||
9f107513 AL |
2946 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
2947 | { | |
ff06030f VJJ |
2948 | Coroutine *co; |
2949 | CoroutineEntry *handler; | |
9f107513 AL |
2950 | |
2951 | if (debug_9p_pdu) { | |
2952 | pprint_pdu(pdu); | |
2953 | } | |
ff06030f VJJ |
2954 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || |
2955 | (pdu_co_handlers[pdu->id] == NULL)) { | |
5c3234c6 AK |
2956 | handler = v9fs_op_not_supp; |
2957 | } else { | |
ff06030f | 2958 | handler = pdu_co_handlers[pdu->id]; |
5c3234c6 | 2959 | } |
ff06030f VJJ |
2960 | co = qemu_coroutine_create(handler); |
2961 | qemu_coroutine_enter(co, pdu); | |
9f107513 AL |
2962 | } |
2963 | ||
f4f61d27 | 2964 | void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
9f107513 AL |
2965 | { |
2966 | V9fsState *s = (V9fsState *)vdev; | |
2967 | V9fsPDU *pdu; | |
2968 | ssize_t len; | |
2969 | ||
2970 | while ((pdu = alloc_pdu(s)) && | |
2971 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
2972 | uint8_t *ptr; | |
ff06030f | 2973 | pdu->s = s; |
9f107513 AL |
2974 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
2975 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
2976 | ||
2977 | ptr = pdu->elem.out_sg[0].iov_base; | |
2978 | ||
2979 | memcpy(&pdu->size, ptr, 4); | |
2980 | pdu->id = ptr[4]; | |
2981 | memcpy(&pdu->tag, ptr + 5, 2); | |
9f107513 AL |
2982 | submit_pdu(s, pdu); |
2983 | } | |
9f107513 AL |
2984 | free_pdu(s, pdu); |
2985 | } |