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Commit | Line | Data |
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9f107513 AL |
1 | /* |
2 | * Virtio 9p backend | |
3 | * | |
4 | * Copyright IBM, Corp. 2010 | |
5 | * | |
6 | * Authors: | |
7 | * Anthony Liguori <aliguori@us.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
873c3213 SW |
14 | #include "hw/virtio.h" |
15 | #include "hw/pc.h" | |
9f107513 | 16 | #include "qemu_socket.h" |
873c3213 | 17 | #include "hw/virtio-pci.h" |
9f107513 AL |
18 | #include "virtio-9p.h" |
19 | #include "fsdev/qemu-fsdev.h" | |
20 | #include "virtio-9p-debug.h" | |
fc22118d | 21 | #include "virtio-9p-xattr.h" |
ff06030f | 22 | #include "virtio-9p-coth.h" |
9f107513 | 23 | |
9f107513 AL |
24 | int debug_9p_pdu; |
25 | ||
fac4f111 VJ |
26 | enum { |
27 | Oread = 0x00, | |
28 | Owrite = 0x01, | |
29 | Ordwr = 0x02, | |
30 | Oexec = 0x03, | |
31 | Oexcl = 0x04, | |
32 | Otrunc = 0x10, | |
33 | Orexec = 0x20, | |
34 | Orclose = 0x40, | |
35 | Oappend = 0x80, | |
36 | }; | |
37 | ||
38 | static int omode_to_uflags(int8_t mode) | |
39 | { | |
40 | int ret = 0; | |
41 | ||
42 | switch (mode & 3) { | |
43 | case Oread: | |
44 | ret = O_RDONLY; | |
45 | break; | |
46 | case Ordwr: | |
47 | ret = O_RDWR; | |
48 | break; | |
49 | case Owrite: | |
50 | ret = O_WRONLY; | |
51 | break; | |
52 | case Oexec: | |
53 | ret = O_RDONLY; | |
54 | break; | |
55 | } | |
56 | ||
57 | if (mode & Otrunc) { | |
58 | ret |= O_TRUNC; | |
59 | } | |
60 | ||
61 | if (mode & Oappend) { | |
62 | ret |= O_APPEND; | |
63 | } | |
64 | ||
65 | if (mode & Oexcl) { | |
66 | ret |= O_EXCL; | |
67 | } | |
68 | ||
69 | return ret; | |
70 | } | |
71 | ||
758e8e38 | 72 | void cred_init(FsCred *credp) |
131dcb25 | 73 | { |
758e8e38 VJ |
74 | credp->fc_uid = -1; |
75 | credp->fc_gid = -1; | |
76 | credp->fc_mode = -1; | |
77 | credp->fc_rdev = -1; | |
131dcb25 AL |
78 | } |
79 | ||
758e8e38 | 80 | static int v9fs_do_lstat(V9fsState *s, V9fsString *path, struct stat *stbuf) |
131dcb25 | 81 | { |
758e8e38 | 82 | return s->ops->lstat(&s->ctx, path->data, stbuf); |
131dcb25 AL |
83 | } |
84 | ||
131dcb25 AL |
85 | static int v9fs_do_close(V9fsState *s, int fd) |
86 | { | |
87 | return s->ops->close(&s->ctx, fd); | |
88 | } | |
89 | ||
90 | static int v9fs_do_closedir(V9fsState *s, DIR *dir) | |
91 | { | |
92 | return s->ops->closedir(&s->ctx, dir); | |
93 | } | |
94 | ||
a6568fe2 AL |
95 | static int v9fs_do_open(V9fsState *s, V9fsString *path, int flags) |
96 | { | |
97 | return s->ops->open(&s->ctx, path->data, flags); | |
98 | } | |
99 | ||
100 | static DIR *v9fs_do_opendir(V9fsState *s, V9fsString *path) | |
101 | { | |
102 | return s->ops->opendir(&s->ctx, path->data); | |
103 | } | |
104 | ||
a9231555 AL |
105 | static void v9fs_do_rewinddir(V9fsState *s, DIR *dir) |
106 | { | |
107 | return s->ops->rewinddir(&s->ctx, dir); | |
108 | } | |
109 | ||
110 | static off_t v9fs_do_telldir(V9fsState *s, DIR *dir) | |
111 | { | |
112 | return s->ops->telldir(&s->ctx, dir); | |
113 | } | |
114 | ||
a9231555 AL |
115 | static void v9fs_do_seekdir(V9fsState *s, DIR *dir, off_t off) |
116 | { | |
117 | return s->ops->seekdir(&s->ctx, dir, off); | |
118 | } | |
119 | ||
56d15a53 SG |
120 | static int v9fs_do_preadv(V9fsState *s, int fd, const struct iovec *iov, |
121 | int iovcnt, int64_t offset) | |
a9231555 | 122 | { |
56d15a53 | 123 | return s->ops->preadv(&s->ctx, fd, iov, iovcnt, offset); |
a9231555 AL |
124 | } |
125 | ||
56d15a53 SG |
126 | static int v9fs_do_pwritev(V9fsState *s, int fd, const struct iovec *iov, |
127 | int iovcnt, int64_t offset) | |
a9231555 | 128 | { |
56d15a53 | 129 | return s->ops->pwritev(&s->ctx, fd, iov, iovcnt, offset); |
8449360c AL |
130 | } |
131 | ||
c494dd6f AL |
132 | static int v9fs_do_chmod(V9fsState *s, V9fsString *path, mode_t mode) |
133 | { | |
e95ead32 VJ |
134 | FsCred cred; |
135 | cred_init(&cred); | |
136 | cred.fc_mode = mode; | |
137 | return s->ops->chmod(&s->ctx, path->data, &cred); | |
c494dd6f AL |
138 | } |
139 | ||
5268cecc MK |
140 | static int v9fs_do_mknod(V9fsState *s, char *name, |
141 | mode_t mode, dev_t dev, uid_t uid, gid_t gid) | |
c494dd6f | 142 | { |
1c293312 VJ |
143 | FsCred cred; |
144 | cred_init(&cred); | |
5268cecc MK |
145 | cred.fc_uid = uid; |
146 | cred.fc_gid = gid; | |
1c293312 VJ |
147 | cred.fc_mode = mode; |
148 | cred.fc_rdev = dev; | |
5268cecc | 149 | return s->ops->mknod(&s->ctx, name, &cred); |
c494dd6f AL |
150 | } |
151 | ||
c494dd6f AL |
152 | static int v9fs_do_fstat(V9fsState *s, int fd, struct stat *stbuf) |
153 | { | |
154 | return s->ops->fstat(&s->ctx, fd, stbuf); | |
155 | } | |
156 | ||
c1568af5 VJ |
157 | static int v9fs_do_open2(V9fsState *s, char *fullname, uid_t uid, gid_t gid, |
158 | int flags, int mode) | |
c494dd6f | 159 | { |
4750a96f | 160 | FsCred cred; |
4750a96f VJ |
161 | |
162 | cred_init(&cred); | |
c1568af5 VJ |
163 | cred.fc_uid = uid; |
164 | cred.fc_gid = gid; | |
165 | cred.fc_mode = mode & 07777; | |
4750a96f | 166 | |
c1568af5 | 167 | return s->ops->open2(&s->ctx, fullname, flags, &cred); |
c494dd6f AL |
168 | } |
169 | ||
08c60fc9 VJ |
170 | static int v9fs_do_symlink(V9fsState *s, V9fsFidState *fidp, |
171 | const char *oldpath, const char *newpath, gid_t gid) | |
c494dd6f | 172 | { |
879c2813 VJ |
173 | FsCred cred; |
174 | cred_init(&cred); | |
08c60fc9 VJ |
175 | cred.fc_uid = fidp->uid; |
176 | cred.fc_gid = gid; | |
177 | cred.fc_mode = 0777; | |
879c2813 | 178 | |
08c60fc9 | 179 | return s->ops->symlink(&s->ctx, oldpath, newpath, &cred); |
c494dd6f AL |
180 | } |
181 | ||
182 | static int v9fs_do_link(V9fsState *s, V9fsString *oldpath, V9fsString *newpath) | |
183 | { | |
184 | return s->ops->link(&s->ctx, oldpath->data, newpath->data); | |
185 | } | |
186 | ||
8cf89e00 AL |
187 | static int v9fs_do_truncate(V9fsState *s, V9fsString *path, off_t size) |
188 | { | |
189 | return s->ops->truncate(&s->ctx, path->data, size); | |
190 | } | |
191 | ||
8cf89e00 AL |
192 | static int v9fs_do_chown(V9fsState *s, V9fsString *path, uid_t uid, gid_t gid) |
193 | { | |
f7613bee VJ |
194 | FsCred cred; |
195 | cred_init(&cred); | |
196 | cred.fc_uid = uid; | |
197 | cred.fc_gid = gid; | |
198 | ||
199 | return s->ops->chown(&s->ctx, path->data, &cred); | |
8cf89e00 AL |
200 | } |
201 | ||
8fc39ae4 SK |
202 | static int v9fs_do_utimensat(V9fsState *s, V9fsString *path, |
203 | const struct timespec times[2]) | |
8cf89e00 | 204 | { |
8fc39ae4 | 205 | return s->ops->utimensat(&s->ctx, path->data, times); |
8cf89e00 AL |
206 | } |
207 | ||
49594973 | 208 | static int v9fs_do_fsync(V9fsState *s, int fd, int datasync) |
8cf89e00 | 209 | { |
49594973 | 210 | return s->ops->fsync(&s->ctx, fd, datasync); |
8cf89e00 AL |
211 | } |
212 | ||
5e94c103 MK |
213 | static int v9fs_do_statfs(V9fsState *s, V9fsString *path, struct statfs *stbuf) |
214 | { | |
215 | return s->ops->statfs(&s->ctx, path->data, stbuf); | |
216 | } | |
217 | ||
10b468bd AK |
218 | static int v9fs_do_lsetxattr(V9fsState *s, V9fsString *path, |
219 | V9fsString *xattr_name, | |
220 | void *value, size_t size, int flags) | |
221 | { | |
222 | return s->ops->lsetxattr(&s->ctx, path->data, | |
223 | xattr_name->data, value, size, flags); | |
224 | } | |
225 | ||
9ed3ef26 AK |
226 | static int v9fs_do_lremovexattr(V9fsState *s, V9fsString *path, |
227 | V9fsString *xattr_name) | |
228 | { | |
229 | return s->ops->lremovexattr(&s->ctx, path->data, | |
230 | xattr_name->data); | |
231 | } | |
232 | ||
233 | ||
a03f7874 AL |
234 | static void v9fs_string_init(V9fsString *str) |
235 | { | |
236 | str->data = NULL; | |
237 | str->size = 0; | |
238 | } | |
239 | ||
240 | static void v9fs_string_free(V9fsString *str) | |
241 | { | |
7267c094 | 242 | g_free(str->data); |
a03f7874 AL |
243 | str->data = NULL; |
244 | str->size = 0; | |
245 | } | |
246 | ||
247 | static void v9fs_string_null(V9fsString *str) | |
248 | { | |
249 | v9fs_string_free(str); | |
250 | } | |
251 | ||
252 | static int number_to_string(void *arg, char type) | |
253 | { | |
254 | unsigned int ret = 0; | |
255 | ||
256 | switch (type) { | |
257 | case 'u': { | |
258 | unsigned int num = *(unsigned int *)arg; | |
259 | ||
260 | do { | |
261 | ret++; | |
262 | num = num/10; | |
263 | } while (num); | |
264 | break; | |
265 | } | |
45b23ff8 VJ |
266 | case 'U': { |
267 | unsigned long num = *(unsigned long *)arg; | |
268 | do { | |
269 | ret++; | |
270 | num = num/10; | |
271 | } while (num); | |
272 | break; | |
273 | } | |
a03f7874 AL |
274 | default: |
275 | printf("Number_to_string: Unknown number format\n"); | |
276 | return -1; | |
277 | } | |
278 | ||
279 | return ret; | |
280 | } | |
281 | ||
c9ba47dc SW |
282 | static int GCC_FMT_ATTR(2, 0) |
283 | v9fs_string_alloc_printf(char **strp, const char *fmt, va_list ap) | |
a03f7874 AL |
284 | { |
285 | va_list ap2; | |
286 | char *iter = (char *)fmt; | |
287 | int len = 0; | |
288 | int nr_args = 0; | |
289 | char *arg_char_ptr; | |
290 | unsigned int arg_uint; | |
45b23ff8 | 291 | unsigned long arg_ulong; |
a03f7874 AL |
292 | |
293 | /* Find the number of %'s that denotes an argument */ | |
294 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
295 | nr_args++; | |
296 | iter++; | |
297 | } | |
298 | ||
299 | len = strlen(fmt) - 2*nr_args; | |
300 | ||
301 | if (!nr_args) { | |
302 | goto alloc_print; | |
303 | } | |
304 | ||
305 | va_copy(ap2, ap); | |
306 | ||
307 | iter = (char *)fmt; | |
308 | ||
309 | /* Now parse the format string */ | |
310 | for (iter = strstr(iter, "%"); iter; iter = strstr(iter, "%")) { | |
311 | iter++; | |
312 | switch (*iter) { | |
313 | case 'u': | |
314 | arg_uint = va_arg(ap2, unsigned int); | |
315 | len += number_to_string((void *)&arg_uint, 'u'); | |
316 | break; | |
45b23ff8 VJ |
317 | case 'l': |
318 | if (*++iter == 'u') { | |
319 | arg_ulong = va_arg(ap2, unsigned long); | |
320 | len += number_to_string((void *)&arg_ulong, 'U'); | |
321 | } else { | |
322 | return -1; | |
323 | } | |
324 | break; | |
a03f7874 AL |
325 | case 's': |
326 | arg_char_ptr = va_arg(ap2, char *); | |
327 | len += strlen(arg_char_ptr); | |
328 | break; | |
329 | case 'c': | |
330 | len += 1; | |
331 | break; | |
332 | default: | |
333 | fprintf(stderr, | |
334 | "v9fs_string_alloc_printf:Incorrect format %c", *iter); | |
335 | return -1; | |
336 | } | |
337 | iter++; | |
338 | } | |
339 | ||
340 | alloc_print: | |
7267c094 | 341 | *strp = g_malloc((len + 1) * sizeof(**strp)); |
a03f7874 AL |
342 | |
343 | return vsprintf(*strp, fmt, ap); | |
344 | } | |
345 | ||
c9ba47dc SW |
346 | static void GCC_FMT_ATTR(2, 3) |
347 | v9fs_string_sprintf(V9fsString *str, const char *fmt, ...) | |
a03f7874 AL |
348 | { |
349 | va_list ap; | |
350 | int err; | |
351 | ||
352 | v9fs_string_free(str); | |
353 | ||
354 | va_start(ap, fmt); | |
355 | err = v9fs_string_alloc_printf(&str->data, fmt, ap); | |
356 | BUG_ON(err == -1); | |
357 | va_end(ap); | |
358 | ||
359 | str->size = err; | |
360 | } | |
361 | ||
362 | static void v9fs_string_copy(V9fsString *lhs, V9fsString *rhs) | |
363 | { | |
364 | v9fs_string_free(lhs); | |
365 | v9fs_string_sprintf(lhs, "%s", rhs->data); | |
366 | } | |
367 | ||
936532a4 MN |
368 | /* |
369 | * Return TRUE if s1 is an ancestor of s2. | |
370 | * | |
371 | * E.g. "a/b" is an ancestor of "a/b/c" but not of "a/bc/d". | |
372 | * As a special case, We treat s1 as ancestor of s2 if they are same! | |
373 | */ | |
374 | static int v9fs_path_is_ancestor(V9fsString *s1, V9fsString *s2) | |
375 | { | |
376 | if (!strncmp(s1->data, s2->data, s1->size)) { | |
377 | if (s2->data[s1->size] == '\0' || s2->data[s1->size] == '/') { | |
378 | return 1; | |
379 | } | |
380 | } | |
381 | return 0; | |
382 | } | |
383 | ||
a03f7874 AL |
384 | static size_t v9fs_string_size(V9fsString *str) |
385 | { | |
386 | return str->size; | |
387 | } | |
388 | ||
286d5652 AL |
389 | static V9fsFidState *lookup_fid(V9fsState *s, int32_t fid) |
390 | { | |
391 | V9fsFidState *f; | |
392 | ||
393 | for (f = s->fid_list; f; f = f->next) { | |
394 | if (f->fid == fid) { | |
286d5652 AL |
395 | return f; |
396 | } | |
397 | } | |
398 | ||
399 | return NULL; | |
400 | } | |
401 | ||
402 | static V9fsFidState *alloc_fid(V9fsState *s, int32_t fid) | |
403 | { | |
404 | V9fsFidState *f; | |
405 | ||
406 | f = lookup_fid(s, fid); | |
407 | if (f) { | |
408 | return NULL; | |
409 | } | |
410 | ||
7267c094 | 411 | f = g_malloc0(sizeof(V9fsFidState)); |
286d5652 AL |
412 | |
413 | f->fid = fid; | |
d62dbb51 | 414 | f->fid_type = P9_FID_NONE; |
286d5652 AL |
415 | |
416 | f->next = s->fid_list; | |
417 | s->fid_list = f; | |
418 | ||
419 | return f; | |
420 | } | |
421 | ||
10b468bd AK |
422 | static int v9fs_xattr_fid_clunk(V9fsState *s, V9fsFidState *fidp) |
423 | { | |
424 | int retval = 0; | |
425 | ||
426 | if (fidp->fs.xattr.copied_len == -1) { | |
427 | /* getxattr/listxattr fid */ | |
428 | goto free_value; | |
429 | } | |
430 | /* | |
431 | * if this is fid for setxattr. clunk should | |
432 | * result in setxattr localcall | |
433 | */ | |
434 | if (fidp->fs.xattr.len != fidp->fs.xattr.copied_len) { | |
435 | /* clunk after partial write */ | |
436 | retval = -EINVAL; | |
437 | goto free_out; | |
438 | } | |
9ed3ef26 AK |
439 | if (fidp->fs.xattr.len) { |
440 | retval = v9fs_do_lsetxattr(s, &fidp->path, &fidp->fs.xattr.name, | |
441 | fidp->fs.xattr.value, | |
442 | fidp->fs.xattr.len, | |
443 | fidp->fs.xattr.flags); | |
444 | } else { | |
445 | retval = v9fs_do_lremovexattr(s, &fidp->path, &fidp->fs.xattr.name); | |
446 | } | |
10b468bd AK |
447 | free_out: |
448 | v9fs_string_free(&fidp->fs.xattr.name); | |
449 | free_value: | |
450 | if (fidp->fs.xattr.value) { | |
7267c094 | 451 | g_free(fidp->fs.xattr.value); |
10b468bd AK |
452 | } |
453 | return retval; | |
454 | } | |
455 | ||
286d5652 AL |
456 | static int free_fid(V9fsState *s, int32_t fid) |
457 | { | |
10b468bd | 458 | int retval = 0; |
286d5652 AL |
459 | V9fsFidState **fidpp, *fidp; |
460 | ||
461 | for (fidpp = &s->fid_list; *fidpp; fidpp = &(*fidpp)->next) { | |
462 | if ((*fidpp)->fid == fid) { | |
463 | break; | |
464 | } | |
465 | } | |
466 | ||
467 | if (*fidpp == NULL) { | |
468 | return -ENOENT; | |
469 | } | |
470 | ||
471 | fidp = *fidpp; | |
472 | *fidpp = fidp->next; | |
473 | ||
d62dbb51 AK |
474 | if (fidp->fid_type == P9_FID_FILE) { |
475 | v9fs_do_close(s, fidp->fs.fd); | |
476 | } else if (fidp->fid_type == P9_FID_DIR) { | |
477 | v9fs_do_closedir(s, fidp->fs.dir); | |
478 | } else if (fidp->fid_type == P9_FID_XATTR) { | |
10b468bd | 479 | retval = v9fs_xattr_fid_clunk(s, fidp); |
286d5652 AL |
480 | } |
481 | v9fs_string_free(&fidp->path); | |
7267c094 | 482 | g_free(fidp); |
286d5652 | 483 | |
10b468bd | 484 | return retval; |
286d5652 AL |
485 | } |
486 | ||
487 | #define P9_QID_TYPE_DIR 0x80 | |
488 | #define P9_QID_TYPE_SYMLINK 0x02 | |
489 | ||
490 | #define P9_STAT_MODE_DIR 0x80000000 | |
491 | #define P9_STAT_MODE_APPEND 0x40000000 | |
492 | #define P9_STAT_MODE_EXCL 0x20000000 | |
493 | #define P9_STAT_MODE_MOUNT 0x10000000 | |
494 | #define P9_STAT_MODE_AUTH 0x08000000 | |
495 | #define P9_STAT_MODE_TMP 0x04000000 | |
496 | #define P9_STAT_MODE_SYMLINK 0x02000000 | |
497 | #define P9_STAT_MODE_LINK 0x01000000 | |
498 | #define P9_STAT_MODE_DEVICE 0x00800000 | |
499 | #define P9_STAT_MODE_NAMED_PIPE 0x00200000 | |
500 | #define P9_STAT_MODE_SOCKET 0x00100000 | |
501 | #define P9_STAT_MODE_SETUID 0x00080000 | |
502 | #define P9_STAT_MODE_SETGID 0x00040000 | |
503 | #define P9_STAT_MODE_SETVTX 0x00010000 | |
504 | ||
505 | #define P9_STAT_MODE_TYPE_BITS (P9_STAT_MODE_DIR | \ | |
506 | P9_STAT_MODE_SYMLINK | \ | |
507 | P9_STAT_MODE_LINK | \ | |
508 | P9_STAT_MODE_DEVICE | \ | |
509 | P9_STAT_MODE_NAMED_PIPE | \ | |
510 | P9_STAT_MODE_SOCKET) | |
511 | ||
512 | /* This is the algorithm from ufs in spfs */ | |
513 | static void stat_to_qid(const struct stat *stbuf, V9fsQID *qidp) | |
514 | { | |
515 | size_t size; | |
516 | ||
517 | size = MIN(sizeof(stbuf->st_ino), sizeof(qidp->path)); | |
518 | memcpy(&qidp->path, &stbuf->st_ino, size); | |
519 | qidp->version = stbuf->st_mtime ^ (stbuf->st_size << 8); | |
520 | qidp->type = 0; | |
521 | if (S_ISDIR(stbuf->st_mode)) { | |
522 | qidp->type |= P9_QID_TYPE_DIR; | |
523 | } | |
524 | if (S_ISLNK(stbuf->st_mode)) { | |
525 | qidp->type |= P9_QID_TYPE_SYMLINK; | |
526 | } | |
527 | } | |
528 | ||
529 | static int fid_to_qid(V9fsState *s, V9fsFidState *fidp, V9fsQID *qidp) | |
530 | { | |
531 | struct stat stbuf; | |
532 | int err; | |
533 | ||
534 | err = v9fs_do_lstat(s, &fidp->path, &stbuf); | |
535 | if (err) { | |
536 | return err; | |
537 | } | |
538 | ||
539 | stat_to_qid(&stbuf, qidp); | |
540 | return 0; | |
541 | } | |
542 | ||
9f107513 AL |
543 | static V9fsPDU *alloc_pdu(V9fsState *s) |
544 | { | |
545 | V9fsPDU *pdu = NULL; | |
546 | ||
547 | if (!QLIST_EMPTY(&s->free_list)) { | |
548 | pdu = QLIST_FIRST(&s->free_list); | |
549 | QLIST_REMOVE(pdu, next); | |
550 | } | |
551 | return pdu; | |
552 | } | |
553 | ||
554 | static void free_pdu(V9fsState *s, V9fsPDU *pdu) | |
555 | { | |
556 | if (pdu) { | |
39792515 AK |
557 | if (debug_9p_pdu) { |
558 | pprint_pdu(pdu); | |
559 | } | |
560 | QLIST_INSERT_HEAD(&s->free_list, pdu, next); | |
9f107513 AL |
561 | } |
562 | } | |
563 | ||
564 | size_t pdu_packunpack(void *addr, struct iovec *sg, int sg_count, | |
565 | size_t offset, size_t size, int pack) | |
566 | { | |
567 | int i = 0; | |
568 | size_t copied = 0; | |
569 | ||
570 | for (i = 0; size && i < sg_count; i++) { | |
571 | size_t len; | |
572 | if (offset >= sg[i].iov_len) { | |
573 | /* skip this sg */ | |
574 | offset -= sg[i].iov_len; | |
575 | continue; | |
576 | } else { | |
577 | len = MIN(sg[i].iov_len - offset, size); | |
578 | if (pack) { | |
579 | memcpy(sg[i].iov_base + offset, addr, len); | |
580 | } else { | |
581 | memcpy(addr, sg[i].iov_base + offset, len); | |
582 | } | |
583 | size -= len; | |
584 | copied += len; | |
585 | addr += len; | |
586 | if (size) { | |
587 | offset = 0; | |
588 | continue; | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | return copied; | |
594 | } | |
595 | ||
405a549a AL |
596 | static size_t pdu_unpack(void *dst, V9fsPDU *pdu, size_t offset, size_t size) |
597 | { | |
598 | return pdu_packunpack(dst, pdu->elem.out_sg, pdu->elem.out_num, | |
599 | offset, size, 0); | |
600 | } | |
601 | ||
602 | static size_t pdu_pack(V9fsPDU *pdu, size_t offset, const void *src, | |
603 | size_t size) | |
604 | { | |
605 | return pdu_packunpack((void *)src, pdu->elem.in_sg, pdu->elem.in_num, | |
606 | offset, size, 1); | |
607 | } | |
608 | ||
609 | static int pdu_copy_sg(V9fsPDU *pdu, size_t offset, int rx, struct iovec *sg) | |
610 | { | |
611 | size_t pos = 0; | |
612 | int i, j; | |
613 | struct iovec *src_sg; | |
614 | unsigned int num; | |
615 | ||
616 | if (rx) { | |
617 | src_sg = pdu->elem.in_sg; | |
618 | num = pdu->elem.in_num; | |
619 | } else { | |
620 | src_sg = pdu->elem.out_sg; | |
621 | num = pdu->elem.out_num; | |
622 | } | |
623 | ||
624 | j = 0; | |
625 | for (i = 0; i < num; i++) { | |
626 | if (offset <= pos) { | |
627 | sg[j].iov_base = src_sg[i].iov_base; | |
628 | sg[j].iov_len = src_sg[i].iov_len; | |
629 | j++; | |
630 | } else if (offset < (src_sg[i].iov_len + pos)) { | |
631 | sg[j].iov_base = src_sg[i].iov_base; | |
632 | sg[j].iov_len = src_sg[i].iov_len; | |
633 | sg[j].iov_base += (offset - pos); | |
634 | sg[j].iov_len -= (offset - pos); | |
635 | j++; | |
636 | } | |
637 | pos += src_sg[i].iov_len; | |
638 | } | |
639 | ||
640 | return j; | |
641 | } | |
642 | ||
643 | static size_t pdu_unmarshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
644 | { | |
645 | size_t old_offset = offset; | |
646 | va_list ap; | |
647 | int i; | |
648 | ||
649 | va_start(ap, fmt); | |
650 | for (i = 0; fmt[i]; i++) { | |
651 | switch (fmt[i]) { | |
652 | case 'b': { | |
653 | uint8_t *valp = va_arg(ap, uint8_t *); | |
654 | offset += pdu_unpack(valp, pdu, offset, sizeof(*valp)); | |
655 | break; | |
656 | } | |
657 | case 'w': { | |
658 | uint16_t val, *valp; | |
659 | valp = va_arg(ap, uint16_t *); | |
405a549a | 660 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 661 | *valp = le16_to_cpu(val); |
405a549a AL |
662 | break; |
663 | } | |
664 | case 'd': { | |
665 | uint32_t val, *valp; | |
666 | valp = va_arg(ap, uint32_t *); | |
405a549a | 667 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 668 | *valp = le32_to_cpu(val); |
405a549a AL |
669 | break; |
670 | } | |
671 | case 'q': { | |
672 | uint64_t val, *valp; | |
673 | valp = va_arg(ap, uint64_t *); | |
405a549a | 674 | offset += pdu_unpack(&val, pdu, offset, sizeof(val)); |
4e37bfc1 | 675 | *valp = le64_to_cpu(val); |
405a549a AL |
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, 0, iov); | |
682 | break; | |
683 | } | |
684 | case 's': { | |
685 | V9fsString *str = va_arg(ap, V9fsString *); | |
686 | offset += pdu_unmarshal(pdu, offset, "w", &str->size); | |
687 | /* FIXME: sanity check str->size */ | |
7267c094 | 688 | str->data = g_malloc(str->size + 1); |
405a549a AL |
689 | offset += pdu_unpack(str->data, pdu, offset, str->size); |
690 | str->data[str->size] = 0; | |
691 | break; | |
692 | } | |
693 | case 'Q': { | |
694 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
695 | offset += pdu_unmarshal(pdu, offset, "bdq", | |
696 | &qidp->type, &qidp->version, &qidp->path); | |
697 | break; | |
698 | } | |
699 | case 'S': { | |
700 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
701 | offset += pdu_unmarshal(pdu, offset, "wwdQdddqsssssddd", | |
702 | &statp->size, &statp->type, &statp->dev, | |
703 | &statp->qid, &statp->mode, &statp->atime, | |
704 | &statp->mtime, &statp->length, | |
705 | &statp->name, &statp->uid, &statp->gid, | |
706 | &statp->muid, &statp->extension, | |
707 | &statp->n_uid, &statp->n_gid, | |
708 | &statp->n_muid); | |
709 | break; | |
710 | } | |
c79ce737 SK |
711 | case 'I': { |
712 | V9fsIattr *iattr = va_arg(ap, V9fsIattr *); | |
713 | offset += pdu_unmarshal(pdu, offset, "ddddqqqqq", | |
714 | &iattr->valid, &iattr->mode, | |
715 | &iattr->uid, &iattr->gid, &iattr->size, | |
716 | &iattr->atime_sec, &iattr->atime_nsec, | |
717 | &iattr->mtime_sec, &iattr->mtime_nsec); | |
718 | break; | |
719 | } | |
405a549a AL |
720 | default: |
721 | break; | |
722 | } | |
723 | } | |
724 | ||
725 | va_end(ap); | |
726 | ||
727 | return offset - old_offset; | |
728 | } | |
729 | ||
730 | static size_t pdu_marshal(V9fsPDU *pdu, size_t offset, const char *fmt, ...) | |
731 | { | |
732 | size_t old_offset = offset; | |
733 | va_list ap; | |
734 | int i; | |
735 | ||
736 | va_start(ap, fmt); | |
737 | for (i = 0; fmt[i]; i++) { | |
738 | switch (fmt[i]) { | |
739 | case 'b': { | |
740 | uint8_t val = va_arg(ap, int); | |
741 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
742 | break; | |
743 | } | |
744 | case 'w': { | |
745 | uint16_t val; | |
746 | cpu_to_le16w(&val, va_arg(ap, int)); | |
747 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
748 | break; | |
749 | } | |
750 | case 'd': { | |
751 | uint32_t val; | |
752 | cpu_to_le32w(&val, va_arg(ap, uint32_t)); | |
753 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
754 | break; | |
755 | } | |
756 | case 'q': { | |
757 | uint64_t val; | |
758 | cpu_to_le64w(&val, va_arg(ap, uint64_t)); | |
759 | offset += pdu_pack(pdu, offset, &val, sizeof(val)); | |
760 | break; | |
761 | } | |
762 | case 'v': { | |
763 | struct iovec *iov = va_arg(ap, struct iovec *); | |
764 | int *iovcnt = va_arg(ap, int *); | |
765 | *iovcnt = pdu_copy_sg(pdu, offset, 1, iov); | |
766 | break; | |
767 | } | |
768 | case 's': { | |
769 | V9fsString *str = va_arg(ap, V9fsString *); | |
770 | offset += pdu_marshal(pdu, offset, "w", str->size); | |
771 | offset += pdu_pack(pdu, offset, str->data, str->size); | |
772 | break; | |
773 | } | |
774 | case 'Q': { | |
775 | V9fsQID *qidp = va_arg(ap, V9fsQID *); | |
776 | offset += pdu_marshal(pdu, offset, "bdq", | |
777 | qidp->type, qidp->version, qidp->path); | |
778 | break; | |
779 | } | |
780 | case 'S': { | |
781 | V9fsStat *statp = va_arg(ap, V9fsStat *); | |
782 | offset += pdu_marshal(pdu, offset, "wwdQdddqsssssddd", | |
783 | statp->size, statp->type, statp->dev, | |
784 | &statp->qid, statp->mode, statp->atime, | |
785 | statp->mtime, statp->length, &statp->name, | |
786 | &statp->uid, &statp->gid, &statp->muid, | |
787 | &statp->extension, statp->n_uid, | |
788 | statp->n_gid, statp->n_muid); | |
789 | break; | |
790 | } | |
00ede4c2 SK |
791 | case 'A': { |
792 | V9fsStatDotl *statp = va_arg(ap, V9fsStatDotl *); | |
793 | offset += pdu_marshal(pdu, offset, "qQdddqqqqqqqqqqqqqqq", | |
794 | statp->st_result_mask, | |
795 | &statp->qid, statp->st_mode, | |
796 | statp->st_uid, statp->st_gid, | |
797 | statp->st_nlink, statp->st_rdev, | |
798 | statp->st_size, statp->st_blksize, statp->st_blocks, | |
799 | statp->st_atime_sec, statp->st_atime_nsec, | |
800 | statp->st_mtime_sec, statp->st_mtime_nsec, | |
801 | statp->st_ctime_sec, statp->st_ctime_nsec, | |
802 | statp->st_btime_sec, statp->st_btime_nsec, | |
803 | statp->st_gen, statp->st_data_version); | |
804 | break; | |
805 | } | |
405a549a AL |
806 | default: |
807 | break; | |
808 | } | |
809 | } | |
810 | va_end(ap); | |
811 | ||
812 | return offset - old_offset; | |
813 | } | |
814 | ||
815 | static void complete_pdu(V9fsState *s, V9fsPDU *pdu, ssize_t len) | |
816 | { | |
817 | int8_t id = pdu->id + 1; /* Response */ | |
818 | ||
819 | if (len < 0) { | |
405a549a | 820 | int err = -len; |
8f4d1ca5 | 821 | len = 7; |
405a549a | 822 | |
8f4d1ca5 AB |
823 | if (s->proto_version != V9FS_PROTO_2000L) { |
824 | V9fsString str; | |
825 | ||
826 | str.data = strerror(err); | |
827 | str.size = strlen(str.data); | |
828 | ||
829 | len += pdu_marshal(pdu, len, "s", &str); | |
830 | id = P9_RERROR; | |
831 | } | |
405a549a | 832 | |
cf03eb2c | 833 | len += pdu_marshal(pdu, len, "d", err); |
405a549a | 834 | |
8f4d1ca5 AB |
835 | if (s->proto_version == V9FS_PROTO_2000L) { |
836 | id = P9_RLERROR; | |
837 | } | |
405a549a AL |
838 | } |
839 | ||
840 | /* fill out the header */ | |
841 | pdu_marshal(pdu, 0, "dbw", (int32_t)len, id, pdu->tag); | |
842 | ||
843 | /* keep these in sync */ | |
844 | pdu->size = len; | |
845 | pdu->id = id; | |
846 | ||
847 | /* push onto queue and notify */ | |
848 | virtqueue_push(s->vq, &pdu->elem, len); | |
849 | ||
850 | /* FIXME: we should batch these completions */ | |
851 | virtio_notify(&s->vdev, s->vq); | |
852 | ||
853 | free_pdu(s, pdu); | |
854 | } | |
855 | ||
bb9e3216 AL |
856 | static mode_t v9mode_to_mode(uint32_t mode, V9fsString *extension) |
857 | { | |
858 | mode_t ret; | |
859 | ||
860 | ret = mode & 0777; | |
861 | if (mode & P9_STAT_MODE_DIR) { | |
862 | ret |= S_IFDIR; | |
863 | } | |
864 | ||
cf03eb2c AB |
865 | if (mode & P9_STAT_MODE_SYMLINK) { |
866 | ret |= S_IFLNK; | |
867 | } | |
868 | if (mode & P9_STAT_MODE_SOCKET) { | |
869 | ret |= S_IFSOCK; | |
870 | } | |
871 | if (mode & P9_STAT_MODE_NAMED_PIPE) { | |
872 | ret |= S_IFIFO; | |
873 | } | |
874 | if (mode & P9_STAT_MODE_DEVICE) { | |
875 | if (extension && extension->data[0] == 'c') { | |
876 | ret |= S_IFCHR; | |
877 | } else { | |
878 | ret |= S_IFBLK; | |
bb9e3216 AL |
879 | } |
880 | } | |
881 | ||
882 | if (!(ret&~0777)) { | |
883 | ret |= S_IFREG; | |
884 | } | |
885 | ||
886 | if (mode & P9_STAT_MODE_SETUID) { | |
887 | ret |= S_ISUID; | |
888 | } | |
889 | if (mode & P9_STAT_MODE_SETGID) { | |
890 | ret |= S_ISGID; | |
891 | } | |
892 | if (mode & P9_STAT_MODE_SETVTX) { | |
893 | ret |= S_ISVTX; | |
894 | } | |
895 | ||
896 | return ret; | |
897 | } | |
898 | ||
899 | static int donttouch_stat(V9fsStat *stat) | |
900 | { | |
901 | if (stat->type == -1 && | |
902 | stat->dev == -1 && | |
903 | stat->qid.type == -1 && | |
904 | stat->qid.version == -1 && | |
905 | stat->qid.path == -1 && | |
906 | stat->mode == -1 && | |
907 | stat->atime == -1 && | |
908 | stat->mtime == -1 && | |
909 | stat->length == -1 && | |
910 | !stat->name.size && | |
911 | !stat->uid.size && | |
912 | !stat->gid.size && | |
913 | !stat->muid.size && | |
914 | stat->n_uid == -1 && | |
915 | stat->n_gid == -1 && | |
916 | stat->n_muid == -1) { | |
917 | return 1; | |
918 | } | |
919 | ||
920 | return 0; | |
921 | } | |
922 | ||
923 | static void v9fs_stat_free(V9fsStat *stat) | |
924 | { | |
925 | v9fs_string_free(&stat->name); | |
926 | v9fs_string_free(&stat->uid); | |
927 | v9fs_string_free(&stat->gid); | |
928 | v9fs_string_free(&stat->muid); | |
929 | v9fs_string_free(&stat->extension); | |
930 | } | |
931 | ||
932 | static uint32_t stat_to_v9mode(const struct stat *stbuf) | |
933 | { | |
934 | uint32_t mode; | |
935 | ||
936 | mode = stbuf->st_mode & 0777; | |
937 | if (S_ISDIR(stbuf->st_mode)) { | |
938 | mode |= P9_STAT_MODE_DIR; | |
939 | } | |
940 | ||
cf03eb2c AB |
941 | if (S_ISLNK(stbuf->st_mode)) { |
942 | mode |= P9_STAT_MODE_SYMLINK; | |
943 | } | |
bb9e3216 | 944 | |
cf03eb2c AB |
945 | if (S_ISSOCK(stbuf->st_mode)) { |
946 | mode |= P9_STAT_MODE_SOCKET; | |
947 | } | |
bb9e3216 | 948 | |
cf03eb2c AB |
949 | if (S_ISFIFO(stbuf->st_mode)) { |
950 | mode |= P9_STAT_MODE_NAMED_PIPE; | |
951 | } | |
bb9e3216 | 952 | |
cf03eb2c AB |
953 | if (S_ISBLK(stbuf->st_mode) || S_ISCHR(stbuf->st_mode)) { |
954 | mode |= P9_STAT_MODE_DEVICE; | |
955 | } | |
bb9e3216 | 956 | |
cf03eb2c AB |
957 | if (stbuf->st_mode & S_ISUID) { |
958 | mode |= P9_STAT_MODE_SETUID; | |
959 | } | |
bb9e3216 | 960 | |
cf03eb2c AB |
961 | if (stbuf->st_mode & S_ISGID) { |
962 | mode |= P9_STAT_MODE_SETGID; | |
963 | } | |
bb9e3216 | 964 | |
cf03eb2c AB |
965 | if (stbuf->st_mode & S_ISVTX) { |
966 | mode |= P9_STAT_MODE_SETVTX; | |
bb9e3216 AL |
967 | } |
968 | ||
969 | return mode; | |
970 | } | |
971 | ||
972 | static int stat_to_v9stat(V9fsState *s, V9fsString *name, | |
973 | const struct stat *stbuf, | |
974 | V9fsStat *v9stat) | |
975 | { | |
976 | int err; | |
977 | const char *str; | |
978 | ||
979 | memset(v9stat, 0, sizeof(*v9stat)); | |
980 | ||
981 | stat_to_qid(stbuf, &v9stat->qid); | |
982 | v9stat->mode = stat_to_v9mode(stbuf); | |
983 | v9stat->atime = stbuf->st_atime; | |
984 | v9stat->mtime = stbuf->st_mtime; | |
985 | v9stat->length = stbuf->st_size; | |
986 | ||
987 | v9fs_string_null(&v9stat->uid); | |
988 | v9fs_string_null(&v9stat->gid); | |
989 | v9fs_string_null(&v9stat->muid); | |
990 | ||
cf03eb2c AB |
991 | v9stat->n_uid = stbuf->st_uid; |
992 | v9stat->n_gid = stbuf->st_gid; | |
993 | v9stat->n_muid = 0; | |
bb9e3216 | 994 | |
cf03eb2c | 995 | v9fs_string_null(&v9stat->extension); |
bb9e3216 | 996 | |
cf03eb2c | 997 | if (v9stat->mode & P9_STAT_MODE_SYMLINK) { |
7a5ca31e VJ |
998 | err = v9fs_co_readlink(s, name, &v9stat->extension); |
999 | if (err < 0) { | |
cf03eb2c | 1000 | return err; |
bb9e3216 | 1001 | } |
cf03eb2c AB |
1002 | } else if (v9stat->mode & P9_STAT_MODE_DEVICE) { |
1003 | v9fs_string_sprintf(&v9stat->extension, "%c %u %u", | |
1004 | S_ISCHR(stbuf->st_mode) ? 'c' : 'b', | |
1005 | major(stbuf->st_rdev), minor(stbuf->st_rdev)); | |
1006 | } else if (S_ISDIR(stbuf->st_mode) || S_ISREG(stbuf->st_mode)) { | |
c9ba47dc SW |
1007 | v9fs_string_sprintf(&v9stat->extension, "%s %lu", |
1008 | "HARDLINKCOUNT", (unsigned long)stbuf->st_nlink); | |
bb9e3216 AL |
1009 | } |
1010 | ||
1011 | str = strrchr(name->data, '/'); | |
1012 | if (str) { | |
1013 | str += 1; | |
1014 | } else { | |
1015 | str = name->data; | |
1016 | } | |
1017 | ||
1018 | v9fs_string_sprintf(&v9stat->name, "%s", str); | |
1019 | ||
1020 | v9stat->size = 61 + | |
1021 | v9fs_string_size(&v9stat->name) + | |
1022 | v9fs_string_size(&v9stat->uid) + | |
1023 | v9fs_string_size(&v9stat->gid) + | |
1024 | v9fs_string_size(&v9stat->muid) + | |
1025 | v9fs_string_size(&v9stat->extension); | |
1026 | return 0; | |
1027 | } | |
1028 | ||
00ede4c2 SK |
1029 | #define P9_STATS_MODE 0x00000001ULL |
1030 | #define P9_STATS_NLINK 0x00000002ULL | |
1031 | #define P9_STATS_UID 0x00000004ULL | |
1032 | #define P9_STATS_GID 0x00000008ULL | |
1033 | #define P9_STATS_RDEV 0x00000010ULL | |
1034 | #define P9_STATS_ATIME 0x00000020ULL | |
1035 | #define P9_STATS_MTIME 0x00000040ULL | |
1036 | #define P9_STATS_CTIME 0x00000080ULL | |
1037 | #define P9_STATS_INO 0x00000100ULL | |
1038 | #define P9_STATS_SIZE 0x00000200ULL | |
1039 | #define P9_STATS_BLOCKS 0x00000400ULL | |
1040 | ||
1041 | #define P9_STATS_BTIME 0x00000800ULL | |
1042 | #define P9_STATS_GEN 0x00001000ULL | |
1043 | #define P9_STATS_DATA_VERSION 0x00002000ULL | |
1044 | ||
1045 | #define P9_STATS_BASIC 0x000007ffULL /* Mask for fields up to BLOCKS */ | |
1046 | #define P9_STATS_ALL 0x00003fffULL /* Mask for All fields above */ | |
1047 | ||
1048 | ||
1049 | static void stat_to_v9stat_dotl(V9fsState *s, const struct stat *stbuf, | |
8db21ce7 | 1050 | V9fsStatDotl *v9lstat) |
00ede4c2 SK |
1051 | { |
1052 | memset(v9lstat, 0, sizeof(*v9lstat)); | |
1053 | ||
1054 | v9lstat->st_mode = stbuf->st_mode; | |
1055 | v9lstat->st_nlink = stbuf->st_nlink; | |
1056 | v9lstat->st_uid = stbuf->st_uid; | |
1057 | v9lstat->st_gid = stbuf->st_gid; | |
1058 | v9lstat->st_rdev = stbuf->st_rdev; | |
1059 | v9lstat->st_size = stbuf->st_size; | |
1060 | v9lstat->st_blksize = stbuf->st_blksize; | |
1061 | v9lstat->st_blocks = stbuf->st_blocks; | |
1062 | v9lstat->st_atime_sec = stbuf->st_atime; | |
1063 | v9lstat->st_atime_nsec = stbuf->st_atim.tv_nsec; | |
1064 | v9lstat->st_mtime_sec = stbuf->st_mtime; | |
1065 | v9lstat->st_mtime_nsec = stbuf->st_mtim.tv_nsec; | |
1066 | v9lstat->st_ctime_sec = stbuf->st_ctime; | |
1067 | v9lstat->st_ctime_nsec = stbuf->st_ctim.tv_nsec; | |
1068 | /* Currently we only support BASIC fields in stat */ | |
1069 | v9lstat->st_result_mask = P9_STATS_BASIC; | |
1070 | ||
1071 | stat_to_qid(stbuf, &v9lstat->qid); | |
1072 | } | |
1073 | ||
1f5a89bf AL |
1074 | static struct iovec *adjust_sg(struct iovec *sg, int len, int *iovcnt) |
1075 | { | |
1076 | while (len && *iovcnt) { | |
1077 | if (len < sg->iov_len) { | |
1078 | sg->iov_len -= len; | |
1079 | sg->iov_base += len; | |
1080 | len = 0; | |
1081 | } else { | |
1082 | len -= sg->iov_len; | |
1083 | sg++; | |
1084 | *iovcnt -= 1; | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | return sg; | |
1089 | } | |
1090 | ||
1091 | static struct iovec *cap_sg(struct iovec *sg, int cap, int *cnt) | |
1092 | { | |
1093 | int i; | |
1094 | int total = 0; | |
1095 | ||
1096 | for (i = 0; i < *cnt; i++) { | |
1097 | if ((total + sg[i].iov_len) > cap) { | |
1098 | sg[i].iov_len -= ((total + sg[i].iov_len) - cap); | |
1099 | i++; | |
1100 | break; | |
1101 | } | |
1102 | total += sg[i].iov_len; | |
1103 | } | |
1104 | ||
1105 | *cnt = i; | |
1106 | ||
1107 | return sg; | |
1108 | } | |
1109 | ||
1110 | static void print_sg(struct iovec *sg, int cnt) | |
1111 | { | |
1112 | int i; | |
1113 | ||
1114 | printf("sg[%d]: {", cnt); | |
1115 | for (i = 0; i < cnt; i++) { | |
1116 | if (i) { | |
1117 | printf(", "); | |
1118 | } | |
1119 | printf("(%p, %zd)", sg[i].iov_base, sg[i].iov_len); | |
1120 | } | |
1121 | printf("}\n"); | |
1122 | } | |
1123 | ||
8cf89e00 AL |
1124 | static void v9fs_fix_path(V9fsString *dst, V9fsString *src, int len) |
1125 | { | |
1126 | V9fsString str; | |
1127 | v9fs_string_init(&str); | |
1128 | v9fs_string_copy(&str, dst); | |
1129 | v9fs_string_sprintf(dst, "%s%s", src->data, str.data+len); | |
1130 | v9fs_string_free(&str); | |
1131 | } | |
1132 | ||
ff06030f | 1133 | static void v9fs_version(void *opaque) |
9f107513 | 1134 | { |
ff06030f VJ |
1135 | V9fsPDU *pdu = opaque; |
1136 | V9fsState *s = pdu->s; | |
92c1ad03 AL |
1137 | V9fsString version; |
1138 | size_t offset = 7; | |
1139 | ||
5e94c103 | 1140 | pdu_unmarshal(pdu, offset, "ds", &s->msize, &version); |
92c1ad03 | 1141 | |
84151514 MK |
1142 | if (!strcmp(version.data, "9P2000.u")) { |
1143 | s->proto_version = V9FS_PROTO_2000U; | |
1144 | } else if (!strcmp(version.data, "9P2000.L")) { | |
1145 | s->proto_version = V9FS_PROTO_2000L; | |
1146 | } else { | |
92c1ad03 | 1147 | v9fs_string_sprintf(&version, "unknown"); |
9f107513 | 1148 | } |
92c1ad03 | 1149 | |
5e94c103 | 1150 | offset += pdu_marshal(pdu, offset, "ds", s->msize, &version); |
92c1ad03 AL |
1151 | complete_pdu(s, pdu, offset); |
1152 | ||
1153 | v9fs_string_free(&version); | |
ff06030f | 1154 | return; |
9f107513 AL |
1155 | } |
1156 | ||
ff06030f | 1157 | static void v9fs_attach(void *opaque) |
9f107513 | 1158 | { |
ff06030f VJ |
1159 | V9fsPDU *pdu = opaque; |
1160 | V9fsState *s = pdu->s; | |
955efc47 AL |
1161 | int32_t fid, afid, n_uname; |
1162 | V9fsString uname, aname; | |
1163 | V9fsFidState *fidp; | |
1164 | V9fsQID qid; | |
1165 | size_t offset = 7; | |
1166 | ssize_t err; | |
1167 | ||
1168 | pdu_unmarshal(pdu, offset, "ddssd", &fid, &afid, &uname, &aname, &n_uname); | |
1169 | ||
1170 | fidp = alloc_fid(s, fid); | |
1171 | if (fidp == NULL) { | |
1172 | err = -EINVAL; | |
1173 | goto out; | |
9f107513 | 1174 | } |
955efc47 AL |
1175 | |
1176 | fidp->uid = n_uname; | |
1177 | ||
1178 | v9fs_string_sprintf(&fidp->path, "%s", "/"); | |
1179 | err = fid_to_qid(s, fidp, &qid); | |
1180 | if (err) { | |
1181 | err = -EINVAL; | |
1182 | free_fid(s, fid); | |
1183 | goto out; | |
1184 | } | |
1185 | ||
1186 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
1187 | ||
1188 | err = offset; | |
1189 | out: | |
1190 | complete_pdu(s, pdu, err); | |
1191 | v9fs_string_free(&uname); | |
1192 | v9fs_string_free(&aname); | |
9f107513 AL |
1193 | } |
1194 | ||
4da7d3fa AL |
1195 | static void v9fs_stat_post_lstat(V9fsState *s, V9fsStatState *vs, int err) |
1196 | { | |
1197 | if (err == -1) { | |
1198 | err = -errno; | |
1199 | goto out; | |
1200 | } | |
1201 | ||
1202 | err = stat_to_v9stat(s, &vs->fidp->path, &vs->stbuf, &vs->v9stat); | |
1203 | if (err) { | |
1204 | goto out; | |
1205 | } | |
1206 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "wS", 0, &vs->v9stat); | |
1207 | err = vs->offset; | |
1208 | ||
1209 | out: | |
1210 | complete_pdu(s, vs->pdu, err); | |
1211 | v9fs_stat_free(&vs->v9stat); | |
7267c094 | 1212 | g_free(vs); |
4da7d3fa AL |
1213 | } |
1214 | ||
ff06030f | 1215 | static void v9fs_stat(void *opaque) |
9f107513 | 1216 | { |
ff06030f VJ |
1217 | V9fsPDU *pdu = opaque; |
1218 | V9fsState *s = pdu->s; | |
4da7d3fa AL |
1219 | int32_t fid; |
1220 | V9fsStatState *vs; | |
1221 | ssize_t err = 0; | |
1222 | ||
7267c094 | 1223 | vs = g_malloc(sizeof(*vs)); |
4da7d3fa AL |
1224 | vs->pdu = pdu; |
1225 | vs->offset = 7; | |
1226 | ||
1227 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1228 | ||
1229 | pdu_unmarshal(vs->pdu, vs->offset, "d", &fid); | |
1230 | ||
1231 | vs->fidp = lookup_fid(s, fid); | |
1232 | if (vs->fidp == NULL) { | |
1233 | err = -ENOENT; | |
1234 | goto out; | |
9f107513 | 1235 | } |
4da7d3fa AL |
1236 | |
1237 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1238 | v9fs_stat_post_lstat(s, vs, err); | |
1239 | return; | |
1240 | ||
1241 | out: | |
1242 | complete_pdu(s, vs->pdu, err); | |
1243 | v9fs_stat_free(&vs->v9stat); | |
7267c094 | 1244 | g_free(vs); |
9f107513 AL |
1245 | } |
1246 | ||
ff06030f | 1247 | static void v9fs_getattr(void *opaque) |
00ede4c2 SK |
1248 | { |
1249 | int32_t fid; | |
8db21ce7 AK |
1250 | size_t offset = 7; |
1251 | ssize_t retval = 0; | |
1252 | struct stat stbuf; | |
00ede4c2 SK |
1253 | V9fsFidState *fidp; |
1254 | uint64_t request_mask; | |
8db21ce7 AK |
1255 | V9fsStatDotl v9stat_dotl; |
1256 | V9fsPDU *pdu = opaque; | |
1257 | V9fsState *s = pdu->s; | |
00ede4c2 | 1258 | |
8db21ce7 | 1259 | pdu_unmarshal(pdu, offset, "dq", &fid, &request_mask); |
00ede4c2 SK |
1260 | |
1261 | fidp = lookup_fid(s, fid); | |
1262 | if (fidp == NULL) { | |
8db21ce7 | 1263 | retval = -ENOENT; |
00ede4c2 SK |
1264 | goto out; |
1265 | } | |
8db21ce7 AK |
1266 | /* |
1267 | * Currently we only support BASIC fields in stat, so there is no | |
00ede4c2 SK |
1268 | * need to look at request_mask. |
1269 | */ | |
8db21ce7 AK |
1270 | retval = v9fs_co_lstat(s, &fidp->path, &stbuf); |
1271 | if (retval < 0) { | |
1272 | goto out; | |
1273 | } | |
1274 | stat_to_v9stat_dotl(s, &stbuf, &v9stat_dotl); | |
1275 | retval = offset; | |
1276 | retval += pdu_marshal(pdu, offset, "A", &v9stat_dotl); | |
00ede4c2 | 1277 | out: |
8db21ce7 | 1278 | complete_pdu(s, pdu, retval); |
00ede4c2 SK |
1279 | } |
1280 | ||
c79ce737 SK |
1281 | /* From Linux kernel code */ |
1282 | #define ATTR_MODE (1 << 0) | |
1283 | #define ATTR_UID (1 << 1) | |
1284 | #define ATTR_GID (1 << 2) | |
1285 | #define ATTR_SIZE (1 << 3) | |
1286 | #define ATTR_ATIME (1 << 4) | |
1287 | #define ATTR_MTIME (1 << 5) | |
1288 | #define ATTR_CTIME (1 << 6) | |
1289 | #define ATTR_MASK 127 | |
1290 | #define ATTR_ATIME_SET (1 << 7) | |
1291 | #define ATTR_MTIME_SET (1 << 8) | |
1292 | ||
65c05f9a | 1293 | static void v9fs_setattr(void *opaque) |
c79ce737 | 1294 | { |
65c05f9a AK |
1295 | int err = 0; |
1296 | int32_t fid; | |
1297 | V9fsFidState *fidp; | |
1298 | size_t offset = 7; | |
1299 | V9fsIattr v9iattr; | |
1300 | V9fsPDU *pdu = opaque; | |
1301 | V9fsState *s = pdu->s; | |
c79ce737 | 1302 | |
65c05f9a | 1303 | pdu_unmarshal(pdu, offset, "dI", &fid, &v9iattr); |
c79ce737 | 1304 | |
65c05f9a AK |
1305 | fidp = lookup_fid(s, fid); |
1306 | if (fidp == NULL) { | |
1307 | err = -EINVAL; | |
c79ce737 SK |
1308 | goto out; |
1309 | } | |
65c05f9a AK |
1310 | if (v9iattr.valid & ATTR_MODE) { |
1311 | err = v9fs_co_chmod(s, &fidp->path, v9iattr.mode); | |
1312 | if (err < 0) { | |
1313 | goto out; | |
c79ce737 | 1314 | } |
c79ce737 | 1315 | } |
65c05f9a | 1316 | if (v9iattr.valid & (ATTR_ATIME | ATTR_MTIME)) { |
c79ce737 | 1317 | struct timespec times[2]; |
65c05f9a AK |
1318 | if (v9iattr.valid & ATTR_ATIME) { |
1319 | if (v9iattr.valid & ATTR_ATIME_SET) { | |
1320 | times[0].tv_sec = v9iattr.atime_sec; | |
1321 | times[0].tv_nsec = v9iattr.atime_nsec; | |
c79ce737 SK |
1322 | } else { |
1323 | times[0].tv_nsec = UTIME_NOW; | |
1324 | } | |
1325 | } else { | |
1326 | times[0].tv_nsec = UTIME_OMIT; | |
1327 | } | |
65c05f9a AK |
1328 | if (v9iattr.valid & ATTR_MTIME) { |
1329 | if (v9iattr.valid & ATTR_MTIME_SET) { | |
1330 | times[1].tv_sec = v9iattr.mtime_sec; | |
1331 | times[1].tv_nsec = v9iattr.mtime_nsec; | |
c79ce737 SK |
1332 | } else { |
1333 | times[1].tv_nsec = UTIME_NOW; | |
1334 | } | |
1335 | } else { | |
1336 | times[1].tv_nsec = UTIME_OMIT; | |
1337 | } | |
65c05f9a AK |
1338 | err = v9fs_co_utimensat(s, &fidp->path, times); |
1339 | if (err < 0) { | |
1340 | goto out; | |
1341 | } | |
c79ce737 | 1342 | } |
65c05f9a AK |
1343 | /* |
1344 | * If the only valid entry in iattr is ctime we can call | |
1345 | * chown(-1,-1) to update the ctime of the file | |
1346 | */ | |
1347 | if ((v9iattr.valid & (ATTR_UID | ATTR_GID)) || | |
1348 | ((v9iattr.valid & ATTR_CTIME) | |
1349 | && !((v9iattr.valid & ATTR_MASK) & ~ATTR_CTIME))) { | |
1350 | if (!(v9iattr.valid & ATTR_UID)) { | |
1351 | v9iattr.uid = -1; | |
1352 | } | |
1353 | if (!(v9iattr.valid & ATTR_GID)) { | |
1354 | v9iattr.gid = -1; | |
1355 | } | |
1356 | err = v9fs_co_chown(s, &fidp->path, v9iattr.uid, | |
1357 | v9iattr.gid); | |
1358 | if (err < 0) { | |
1359 | goto out; | |
1360 | } | |
c79ce737 | 1361 | } |
65c05f9a AK |
1362 | if (v9iattr.valid & (ATTR_SIZE)) { |
1363 | err = v9fs_co_truncate(s, &fidp->path, v9iattr.size); | |
1364 | if (err < 0) { | |
1365 | goto out; | |
1366 | } | |
c79ce737 | 1367 | } |
65c05f9a | 1368 | err = offset; |
c79ce737 | 1369 | out: |
65c05f9a | 1370 | complete_pdu(s, pdu, err); |
c79ce737 SK |
1371 | } |
1372 | ||
ff5e54c9 AL |
1373 | static void v9fs_walk_complete(V9fsState *s, V9fsWalkState *vs, int err) |
1374 | { | |
1375 | complete_pdu(s, vs->pdu, err); | |
1376 | ||
4f8dee2d | 1377 | if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) { |
ff5e54c9 AL |
1378 | for (vs->name_idx = 0; vs->name_idx < vs->nwnames; vs->name_idx++) { |
1379 | v9fs_string_free(&vs->wnames[vs->name_idx]); | |
1380 | } | |
1381 | ||
7267c094 AL |
1382 | g_free(vs->wnames); |
1383 | g_free(vs->qids); | |
ff5e54c9 AL |
1384 | } |
1385 | } | |
1386 | ||
1387 | static void v9fs_walk_marshal(V9fsWalkState *vs) | |
1388 | { | |
1389 | int i; | |
1390 | vs->offset = 7; | |
1391 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "w", vs->nwnames); | |
1392 | ||
1393 | for (i = 0; i < vs->nwnames; i++) { | |
1394 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qids[i]); | |
1395 | } | |
1396 | } | |
1397 | ||
1398 | static void v9fs_walk_post_newfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1399 | int err) | |
1400 | { | |
1401 | if (err == -1) { | |
1402 | free_fid(s, vs->newfidp->fid); | |
1403 | v9fs_string_free(&vs->path); | |
1404 | err = -ENOENT; | |
1405 | goto out; | |
1406 | } | |
1407 | ||
1408 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1409 | ||
1410 | vs->name_idx++; | |
1411 | if (vs->name_idx < vs->nwnames) { | |
1412 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1413 | vs->wnames[vs->name_idx].data); | |
1414 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1415 | ||
1416 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1417 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1418 | return; | |
1419 | } | |
1420 | ||
1421 | v9fs_string_free(&vs->path); | |
1422 | v9fs_walk_marshal(vs); | |
1423 | err = vs->offset; | |
1424 | out: | |
1425 | v9fs_walk_complete(s, vs, err); | |
1426 | } | |
1427 | ||
1428 | static void v9fs_walk_post_oldfid_lstat(V9fsState *s, V9fsWalkState *vs, | |
1429 | int err) | |
1430 | { | |
1431 | if (err == -1) { | |
1432 | v9fs_string_free(&vs->path); | |
1433 | err = -ENOENT; | |
1434 | goto out; | |
1435 | } | |
1436 | ||
1437 | stat_to_qid(&vs->stbuf, &vs->qids[vs->name_idx]); | |
1438 | vs->name_idx++; | |
1439 | if (vs->name_idx < vs->nwnames) { | |
1440 | ||
1441 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1442 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1443 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1444 | ||
1445 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1446 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1447 | return; | |
1448 | } | |
1449 | ||
1450 | v9fs_string_free(&vs->path); | |
1451 | v9fs_walk_marshal(vs); | |
1452 | err = vs->offset; | |
1453 | out: | |
1454 | v9fs_walk_complete(s, vs, err); | |
1455 | } | |
1456 | ||
ff06030f | 1457 | static void v9fs_walk(void *opaque) |
9f107513 | 1458 | { |
ff06030f VJ |
1459 | V9fsPDU *pdu = opaque; |
1460 | V9fsState *s = pdu->s; | |
ff5e54c9 AL |
1461 | int32_t fid, newfid; |
1462 | V9fsWalkState *vs; | |
1463 | int err = 0; | |
1464 | int i; | |
1465 | ||
7267c094 | 1466 | vs = g_malloc(sizeof(*vs)); |
ff5e54c9 AL |
1467 | vs->pdu = pdu; |
1468 | vs->wnames = NULL; | |
1469 | vs->qids = NULL; | |
1470 | vs->offset = 7; | |
1471 | ||
1472 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "ddw", &fid, | |
1473 | &newfid, &vs->nwnames); | |
1474 | ||
4f8dee2d | 1475 | if (vs->nwnames && vs->nwnames <= P9_MAXWELEM) { |
7267c094 | 1476 | vs->wnames = g_malloc0(sizeof(vs->wnames[0]) * vs->nwnames); |
ff5e54c9 | 1477 | |
7267c094 | 1478 | vs->qids = g_malloc0(sizeof(vs->qids[0]) * vs->nwnames); |
ff5e54c9 AL |
1479 | |
1480 | for (i = 0; i < vs->nwnames; i++) { | |
1481 | vs->offset += pdu_unmarshal(vs->pdu, vs->offset, "s", | |
1482 | &vs->wnames[i]); | |
1483 | } | |
4f8dee2d HPB |
1484 | } else if (vs->nwnames > P9_MAXWELEM) { |
1485 | err = -EINVAL; | |
1486 | goto out; | |
ff5e54c9 AL |
1487 | } |
1488 | ||
1489 | vs->fidp = lookup_fid(s, fid); | |
1490 | if (vs->fidp == NULL) { | |
1491 | err = -ENOENT; | |
1492 | goto out; | |
1493 | } | |
1494 | ||
1495 | /* FIXME: is this really valid? */ | |
1496 | if (fid == newfid) { | |
1497 | ||
d62dbb51 | 1498 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
ff5e54c9 AL |
1499 | v9fs_string_init(&vs->path); |
1500 | vs->name_idx = 0; | |
1501 | ||
1502 | if (vs->name_idx < vs->nwnames) { | |
1503 | v9fs_string_sprintf(&vs->path, "%s/%s", | |
1504 | vs->fidp->path.data, vs->wnames[vs->name_idx].data); | |
1505 | v9fs_string_copy(&vs->fidp->path, &vs->path); | |
1506 | ||
1507 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1508 | v9fs_walk_post_oldfid_lstat(s, vs, err); | |
1509 | return; | |
1510 | } | |
1511 | } else { | |
1512 | vs->newfidp = alloc_fid(s, newfid); | |
1513 | if (vs->newfidp == NULL) { | |
1514 | err = -EINVAL; | |
1515 | goto out; | |
1516 | } | |
1517 | ||
1518 | vs->newfidp->uid = vs->fidp->uid; | |
1519 | v9fs_string_init(&vs->path); | |
1520 | vs->name_idx = 0; | |
1521 | v9fs_string_copy(&vs->newfidp->path, &vs->fidp->path); | |
1522 | ||
1523 | if (vs->name_idx < vs->nwnames) { | |
1524 | v9fs_string_sprintf(&vs->path, "%s/%s", vs->newfidp->path.data, | |
1525 | vs->wnames[vs->name_idx].data); | |
1526 | v9fs_string_copy(&vs->newfidp->path, &vs->path); | |
1527 | ||
1528 | err = v9fs_do_lstat(s, &vs->newfidp->path, &vs->stbuf); | |
1529 | v9fs_walk_post_newfid_lstat(s, vs, err); | |
1530 | return; | |
1531 | } | |
9f107513 | 1532 | } |
ff5e54c9 AL |
1533 | |
1534 | v9fs_walk_marshal(vs); | |
1535 | err = vs->offset; | |
1536 | out: | |
1537 | v9fs_walk_complete(s, vs, err); | |
9f107513 AL |
1538 | } |
1539 | ||
5e94c103 MK |
1540 | static int32_t get_iounit(V9fsState *s, V9fsString *name) |
1541 | { | |
1542 | struct statfs stbuf; | |
1543 | int32_t iounit = 0; | |
1544 | ||
1545 | /* | |
1546 | * iounit should be multiples of f_bsize (host filesystem block size | |
1547 | * and as well as less than (client msize - P9_IOHDRSZ)) | |
1548 | */ | |
1549 | if (!v9fs_do_statfs(s, name, &stbuf)) { | |
1550 | iounit = stbuf.f_bsize; | |
1551 | iounit *= (s->msize - P9_IOHDRSZ)/stbuf.f_bsize; | |
1552 | } | |
1553 | ||
1554 | if (!iounit) { | |
1555 | iounit = s->msize - P9_IOHDRSZ; | |
1556 | } | |
1557 | return iounit; | |
1558 | } | |
1559 | ||
a6568fe2 AL |
1560 | static void v9fs_open_post_opendir(V9fsState *s, V9fsOpenState *vs, int err) |
1561 | { | |
d62dbb51 | 1562 | if (vs->fidp->fs.dir == NULL) { |
a6568fe2 AL |
1563 | err = -errno; |
1564 | goto out; | |
1565 | } | |
d62dbb51 | 1566 | vs->fidp->fid_type = P9_FID_DIR; |
a6568fe2 AL |
1567 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, 0); |
1568 | err = vs->offset; | |
1569 | out: | |
1570 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1571 | g_free(vs); |
a6568fe2 AL |
1572 | |
1573 | } | |
1574 | ||
5e94c103 MK |
1575 | static void v9fs_open_post_getiounit(V9fsState *s, V9fsOpenState *vs) |
1576 | { | |
1577 | int err; | |
1578 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); | |
1579 | err = vs->offset; | |
1580 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1581 | g_free(vs); |
5e94c103 MK |
1582 | } |
1583 | ||
a6568fe2 AL |
1584 | static void v9fs_open_post_open(V9fsState *s, V9fsOpenState *vs, int err) |
1585 | { | |
d62dbb51 | 1586 | if (vs->fidp->fs.fd == -1) { |
a6568fe2 AL |
1587 | err = -errno; |
1588 | goto out; | |
1589 | } | |
d62dbb51 | 1590 | vs->fidp->fid_type = P9_FID_FILE; |
5e94c103 MK |
1591 | vs->iounit = get_iounit(s, &vs->fidp->path); |
1592 | v9fs_open_post_getiounit(s, vs); | |
1593 | return; | |
a6568fe2 AL |
1594 | out: |
1595 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1596 | g_free(vs); |
a6568fe2 AL |
1597 | } |
1598 | ||
1599 | static void v9fs_open_post_lstat(V9fsState *s, V9fsOpenState *vs, int err) | |
1600 | { | |
771e9d4c MK |
1601 | int flags; |
1602 | ||
a6568fe2 AL |
1603 | if (err) { |
1604 | err = -errno; | |
1605 | goto out; | |
1606 | } | |
1607 | ||
1608 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1609 | ||
1610 | if (S_ISDIR(vs->stbuf.st_mode)) { | |
d62dbb51 | 1611 | vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fidp->path); |
a6568fe2 AL |
1612 | v9fs_open_post_opendir(s, vs, err); |
1613 | } else { | |
771e9d4c | 1614 | if (s->proto_version == V9FS_PROTO_2000L) { |
771e9d4c | 1615 | flags = vs->mode; |
630c2689 | 1616 | flags &= ~(O_NOCTTY | O_ASYNC | O_CREAT); |
0f8151cb VJ |
1617 | /* Ignore direct disk access hint until the server supports it. */ |
1618 | flags &= ~O_DIRECT; | |
771e9d4c MK |
1619 | } else { |
1620 | flags = omode_to_uflags(vs->mode); | |
1621 | } | |
d62dbb51 | 1622 | vs->fidp->fs.fd = v9fs_do_open(s, &vs->fidp->path, flags); |
a6568fe2 AL |
1623 | v9fs_open_post_open(s, vs, err); |
1624 | } | |
1625 | return; | |
1626 | out: | |
1627 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1628 | g_free(vs); |
9f107513 AL |
1629 | } |
1630 | ||
ff06030f | 1631 | static void v9fs_open(void *opaque) |
a6568fe2 | 1632 | { |
ff06030f VJ |
1633 | V9fsPDU *pdu = opaque; |
1634 | V9fsState *s = pdu->s; | |
a6568fe2 AL |
1635 | int32_t fid; |
1636 | V9fsOpenState *vs; | |
1637 | ssize_t err = 0; | |
1638 | ||
7267c094 | 1639 | vs = g_malloc(sizeof(*vs)); |
a6568fe2 AL |
1640 | vs->pdu = pdu; |
1641 | vs->offset = 7; | |
771e9d4c | 1642 | vs->mode = 0; |
a6568fe2 | 1643 | |
771e9d4c MK |
1644 | if (s->proto_version == V9FS_PROTO_2000L) { |
1645 | pdu_unmarshal(vs->pdu, vs->offset, "dd", &fid, &vs->mode); | |
1646 | } else { | |
1647 | pdu_unmarshal(vs->pdu, vs->offset, "db", &fid, &vs->mode); | |
1648 | } | |
a6568fe2 AL |
1649 | |
1650 | vs->fidp = lookup_fid(s, fid); | |
1651 | if (vs->fidp == NULL) { | |
1652 | err = -ENOENT; | |
1653 | goto out; | |
1654 | } | |
1655 | ||
d62dbb51 | 1656 | BUG_ON(vs->fidp->fid_type != P9_FID_NONE); |
a6568fe2 AL |
1657 | |
1658 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
1659 | ||
1660 | v9fs_open_post_lstat(s, vs, err); | |
1661 | return; | |
1662 | out: | |
1663 | complete_pdu(s, pdu, err); | |
7267c094 | 1664 | g_free(vs); |
a6568fe2 AL |
1665 | } |
1666 | ||
c1568af5 VJ |
1667 | static void v9fs_post_lcreate(V9fsState *s, V9fsLcreateState *vs, int err) |
1668 | { | |
1669 | if (err == 0) { | |
1670 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
1671 | stat_to_qid(&vs->stbuf, &vs->qid); | |
1672 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, | |
1d810aeb | 1673 | vs->iounit); |
c1568af5 VJ |
1674 | err = vs->offset; |
1675 | } else { | |
d62dbb51 | 1676 | vs->fidp->fid_type = P9_FID_NONE; |
c1568af5 | 1677 | err = -errno; |
ab03b63d SK |
1678 | if (vs->fidp->fs.fd > 0) { |
1679 | close(vs->fidp->fs.fd); | |
1680 | } | |
c1568af5 VJ |
1681 | } |
1682 | ||
1683 | complete_pdu(s, vs->pdu, err); | |
1684 | v9fs_string_free(&vs->name); | |
1685 | v9fs_string_free(&vs->fullname); | |
7267c094 | 1686 | g_free(vs); |
c1568af5 VJ |
1687 | } |
1688 | ||
1689 | static void v9fs_lcreate_post_get_iounit(V9fsState *s, V9fsLcreateState *vs, | |
1690 | int err) | |
1691 | { | |
1692 | if (err) { | |
1693 | err = -errno; | |
1694 | goto out; | |
1695 | } | |
1696 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
1697 | ||
1698 | out: | |
1699 | v9fs_post_lcreate(s, vs, err); | |
1700 | } | |
1701 | ||
1702 | static void v9fs_lcreate_post_do_open2(V9fsState *s, V9fsLcreateState *vs, | |
1703 | int err) | |
1704 | { | |
d62dbb51 | 1705 | if (vs->fidp->fs.fd == -1) { |
c1568af5 VJ |
1706 | err = -errno; |
1707 | goto out; | |
1708 | } | |
d62dbb51 | 1709 | vs->fidp->fid_type = P9_FID_FILE; |
c1568af5 VJ |
1710 | vs->iounit = get_iounit(s, &vs->fullname); |
1711 | v9fs_lcreate_post_get_iounit(s, vs, err); | |
1712 | return; | |
1713 | ||
1714 | out: | |
1715 | v9fs_post_lcreate(s, vs, err); | |
1716 | } | |
1717 | ||
ff06030f | 1718 | static void v9fs_lcreate(void *opaque) |
c1568af5 | 1719 | { |
ff06030f VJ |
1720 | V9fsPDU *pdu = opaque; |
1721 | V9fsState *s = pdu->s; | |
c1568af5 VJ |
1722 | int32_t dfid, flags, mode; |
1723 | gid_t gid; | |
1724 | V9fsLcreateState *vs; | |
1725 | ssize_t err = 0; | |
1726 | ||
7267c094 | 1727 | vs = g_malloc(sizeof(*vs)); |
c1568af5 VJ |
1728 | vs->pdu = pdu; |
1729 | vs->offset = 7; | |
1730 | ||
1731 | v9fs_string_init(&vs->fullname); | |
1732 | ||
1733 | pdu_unmarshal(vs->pdu, vs->offset, "dsddd", &dfid, &vs->name, &flags, | |
1734 | &mode, &gid); | |
1735 | ||
1736 | vs->fidp = lookup_fid(s, dfid); | |
1737 | if (vs->fidp == NULL) { | |
1738 | err = -ENOENT; | |
1739 | goto out; | |
1740 | } | |
1741 | ||
1742 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
1743 | vs->name.data); | |
1744 | ||
0f8151cb VJ |
1745 | /* Ignore direct disk access hint until the server supports it. */ |
1746 | flags &= ~O_DIRECT; | |
1747 | ||
d62dbb51 | 1748 | vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
c1568af5 VJ |
1749 | gid, flags, mode); |
1750 | v9fs_lcreate_post_do_open2(s, vs, err); | |
1751 | return; | |
1752 | ||
1753 | out: | |
1754 | complete_pdu(s, vs->pdu, err); | |
1755 | v9fs_string_free(&vs->name); | |
7267c094 | 1756 | g_free(vs); |
c1568af5 VJ |
1757 | } |
1758 | ||
b41e95d3 VJ |
1759 | static void v9fs_post_do_fsync(V9fsState *s, V9fsPDU *pdu, int err) |
1760 | { | |
1761 | if (err == -1) { | |
1762 | err = -errno; | |
1763 | } | |
1764 | complete_pdu(s, pdu, err); | |
1765 | } | |
1766 | ||
ff06030f | 1767 | static void v9fs_fsync(void *opaque) |
b41e95d3 | 1768 | { |
ff06030f VJ |
1769 | V9fsPDU *pdu = opaque; |
1770 | V9fsState *s = pdu->s; | |
b41e95d3 VJ |
1771 | int32_t fid; |
1772 | size_t offset = 7; | |
1773 | V9fsFidState *fidp; | |
49594973 | 1774 | int datasync; |
b41e95d3 VJ |
1775 | int err; |
1776 | ||
49594973 | 1777 | pdu_unmarshal(pdu, offset, "dd", &fid, &datasync); |
b41e95d3 VJ |
1778 | fidp = lookup_fid(s, fid); |
1779 | if (fidp == NULL) { | |
1780 | err = -ENOENT; | |
1781 | v9fs_post_do_fsync(s, pdu, err); | |
1782 | return; | |
1783 | } | |
49594973 | 1784 | err = v9fs_do_fsync(s, fidp->fs.fd, datasync); |
b41e95d3 VJ |
1785 | v9fs_post_do_fsync(s, pdu, err); |
1786 | } | |
1787 | ||
ff06030f | 1788 | static void v9fs_clunk(void *opaque) |
a6568fe2 | 1789 | { |
ff06030f VJ |
1790 | V9fsPDU *pdu = opaque; |
1791 | V9fsState *s = pdu->s; | |
bbd5697b AL |
1792 | int32_t fid; |
1793 | size_t offset = 7; | |
1794 | int err; | |
1795 | ||
1796 | pdu_unmarshal(pdu, offset, "d", &fid); | |
1797 | ||
1798 | err = free_fid(s, fid); | |
1799 | if (err < 0) { | |
1800 | goto out; | |
a6568fe2 | 1801 | } |
bbd5697b AL |
1802 | |
1803 | offset = 7; | |
1804 | err = offset; | |
1805 | out: | |
1806 | complete_pdu(s, pdu, err); | |
9f107513 AL |
1807 | } |
1808 | ||
a9231555 AL |
1809 | static void v9fs_read_post_readdir(V9fsState *, V9fsReadState *, ssize_t); |
1810 | ||
1811 | static void v9fs_read_post_seekdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1812 | { | |
1813 | if (err) { | |
1814 | goto out; | |
1815 | } | |
a9231555 AL |
1816 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); |
1817 | vs->offset += vs->count; | |
1818 | err = vs->offset; | |
1819 | out: | |
1820 | complete_pdu(s, vs->pdu, err); | |
7a5ca31e VJ |
1821 | v9fs_stat_free(&vs->v9stat); |
1822 | v9fs_string_free(&vs->name); | |
7267c094 | 1823 | g_free(vs); |
a9231555 AL |
1824 | return; |
1825 | } | |
1826 | ||
1827 | static void v9fs_read_post_dir_lstat(V9fsState *s, V9fsReadState *vs, | |
1828 | ssize_t err) | |
1829 | { | |
1830 | if (err) { | |
1831 | err = -errno; | |
1832 | goto out; | |
1833 | } | |
1834 | err = stat_to_v9stat(s, &vs->name, &vs->stbuf, &vs->v9stat); | |
1835 | if (err) { | |
1836 | goto out; | |
1837 | } | |
1838 | ||
1839 | vs->len = pdu_marshal(vs->pdu, vs->offset + 4 + vs->count, "S", | |
1840 | &vs->v9stat); | |
1841 | if ((vs->len != (vs->v9stat.size + 2)) || | |
1842 | ((vs->count + vs->len) > vs->max_count)) { | |
d62dbb51 | 1843 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1844 | v9fs_read_post_seekdir(s, vs, err); |
1845 | return; | |
1846 | } | |
1847 | vs->count += vs->len; | |
1848 | v9fs_stat_free(&vs->v9stat); | |
1849 | v9fs_string_free(&vs->name); | |
1850 | vs->dir_pos = vs->dent->d_off; | |
5e4eaa79 | 1851 | v9fs_co_readdir(s, vs->fidp, &vs->dent); |
a9231555 AL |
1852 | v9fs_read_post_readdir(s, vs, err); |
1853 | return; | |
1854 | out: | |
d62dbb51 | 1855 | v9fs_do_seekdir(s, vs->fidp->fs.dir, vs->dir_pos); |
a9231555 AL |
1856 | v9fs_read_post_seekdir(s, vs, err); |
1857 | return; | |
1858 | ||
1859 | } | |
1860 | ||
1861 | static void v9fs_read_post_readdir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1862 | { | |
1863 | if (vs->dent) { | |
1864 | memset(&vs->v9stat, 0, sizeof(vs->v9stat)); | |
1865 | v9fs_string_init(&vs->name); | |
1866 | v9fs_string_sprintf(&vs->name, "%s/%s", vs->fidp->path.data, | |
1867 | vs->dent->d_name); | |
1868 | err = v9fs_do_lstat(s, &vs->name, &vs->stbuf); | |
1869 | v9fs_read_post_dir_lstat(s, vs, err); | |
1870 | return; | |
1871 | } | |
1872 | ||
1873 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->count); | |
1874 | vs->offset += vs->count; | |
1875 | err = vs->offset; | |
1876 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1877 | g_free(vs); |
a9231555 AL |
1878 | return; |
1879 | } | |
1880 | ||
1881 | static void v9fs_read_post_telldir(V9fsState *s, V9fsReadState *vs, ssize_t err) | |
1882 | { | |
5e4eaa79 | 1883 | v9fs_co_readdir(s, vs->fidp, &vs->dent); |
a9231555 AL |
1884 | v9fs_read_post_readdir(s, vs, err); |
1885 | return; | |
1886 | } | |
1887 | ||
1888 | static void v9fs_read_post_rewinddir(V9fsState *s, V9fsReadState *vs, | |
1889 | ssize_t err) | |
1890 | { | |
d62dbb51 | 1891 | vs->dir_pos = v9fs_do_telldir(s, vs->fidp->fs.dir); |
a9231555 AL |
1892 | v9fs_read_post_telldir(s, vs, err); |
1893 | return; | |
1894 | } | |
1895 | ||
56d15a53 | 1896 | static void v9fs_read_post_preadv(V9fsState *s, V9fsReadState *vs, ssize_t err) |
a9231555 AL |
1897 | { |
1898 | if (err < 0) { | |
1899 | /* IO error return the error */ | |
1900 | err = -errno; | |
1901 | goto out; | |
1902 | } | |
1903 | vs->total += vs->len; | |
1904 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
1905 | if (vs->total < vs->count && vs->len > 0) { | |
1906 | do { | |
1907 | if (0) { | |
1908 | print_sg(vs->sg, vs->cnt); | |
1909 | } | |
56d15a53 SG |
1910 | vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
1911 | vs->off); | |
1912 | if (vs->len > 0) { | |
1913 | vs->off += vs->len; | |
1914 | } | |
a9231555 AL |
1915 | } while (vs->len == -1 && errno == EINTR); |
1916 | if (vs->len == -1) { | |
1917 | err = -errno; | |
1918 | } | |
56d15a53 | 1919 | v9fs_read_post_preadv(s, vs, err); |
a9231555 AL |
1920 | return; |
1921 | } | |
1922 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
1923 | vs->offset += vs->count; | |
1924 | err = vs->offset; | |
1925 | ||
1926 | out: | |
1927 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1928 | g_free(vs); |
a9231555 AL |
1929 | } |
1930 | ||
fa32ef88 AK |
1931 | static void v9fs_xattr_read(V9fsState *s, V9fsReadState *vs) |
1932 | { | |
1933 | ssize_t err = 0; | |
1934 | int read_count; | |
1935 | int64_t xattr_len; | |
1936 | ||
1937 | xattr_len = vs->fidp->fs.xattr.len; | |
1938 | read_count = xattr_len - vs->off; | |
1939 | if (read_count > vs->count) { | |
1940 | read_count = vs->count; | |
1941 | } else if (read_count < 0) { | |
1942 | /* | |
1943 | * read beyond XATTR value | |
1944 | */ | |
1945 | read_count = 0; | |
1946 | } | |
1947 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", read_count); | |
1948 | vs->offset += pdu_pack(vs->pdu, vs->offset, | |
1949 | ((char *)vs->fidp->fs.xattr.value) + vs->off, | |
1950 | read_count); | |
1951 | err = vs->offset; | |
1952 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 1953 | g_free(vs); |
fa32ef88 AK |
1954 | } |
1955 | ||
ff06030f | 1956 | static void v9fs_read(void *opaque) |
9f107513 | 1957 | { |
ff06030f VJ |
1958 | V9fsPDU *pdu = opaque; |
1959 | V9fsState *s = pdu->s; | |
a9231555 AL |
1960 | int32_t fid; |
1961 | V9fsReadState *vs; | |
1962 | ssize_t err = 0; | |
1963 | ||
7267c094 | 1964 | vs = g_malloc(sizeof(*vs)); |
a9231555 AL |
1965 | vs->pdu = pdu; |
1966 | vs->offset = 7; | |
1967 | vs->total = 0; | |
1968 | vs->len = 0; | |
1969 | vs->count = 0; | |
1970 | ||
1971 | pdu_unmarshal(vs->pdu, vs->offset, "dqd", &fid, &vs->off, &vs->count); | |
1972 | ||
1973 | vs->fidp = lookup_fid(s, fid); | |
1974 | if (vs->fidp == NULL) { | |
1975 | err = -EINVAL; | |
1976 | goto out; | |
1977 | } | |
1978 | ||
fa32ef88 | 1979 | if (vs->fidp->fid_type == P9_FID_DIR) { |
a9231555 AL |
1980 | vs->max_count = vs->count; |
1981 | vs->count = 0; | |
1982 | if (vs->off == 0) { | |
d62dbb51 | 1983 | v9fs_do_rewinddir(s, vs->fidp->fs.dir); |
a9231555 AL |
1984 | } |
1985 | v9fs_read_post_rewinddir(s, vs, err); | |
1986 | return; | |
fa32ef88 | 1987 | } else if (vs->fidp->fid_type == P9_FID_FILE) { |
a9231555 AL |
1988 | vs->sg = vs->iov; |
1989 | pdu_marshal(vs->pdu, vs->offset + 4, "v", vs->sg, &vs->cnt); | |
56d15a53 SG |
1990 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
1991 | if (vs->total <= vs->count) { | |
1992 | vs->len = v9fs_do_preadv(s, vs->fidp->fs.fd, vs->sg, vs->cnt, | |
1993 | vs->off); | |
1994 | if (vs->len > 0) { | |
1995 | vs->off += vs->len; | |
1996 | } | |
1997 | err = vs->len; | |
1998 | v9fs_read_post_preadv(s, vs, err); | |
1999 | } | |
a9231555 | 2000 | return; |
fa32ef88 AK |
2001 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { |
2002 | v9fs_xattr_read(s, vs); | |
2003 | return; | |
a9231555 AL |
2004 | } else { |
2005 | err = -EINVAL; | |
9f107513 | 2006 | } |
a9231555 AL |
2007 | out: |
2008 | complete_pdu(s, pdu, err); | |
7267c094 | 2009 | g_free(vs); |
9f107513 AL |
2010 | } |
2011 | ||
5e4eaa79 | 2012 | static size_t v9fs_readdir_data_size(V9fsString *name) |
c18e2f94 | 2013 | { |
5e4eaa79 AK |
2014 | /* |
2015 | * Size of each dirent on the wire: size of qid (13) + size of offset (8) | |
2016 | * size of type (1) + size of name.size (2) + strlen(name.data) | |
2017 | */ | |
2018 | return 24 + v9fs_string_size(name); | |
c18e2f94 SK |
2019 | } |
2020 | ||
5e4eaa79 AK |
2021 | static int v9fs_do_readdir(V9fsState *s, V9fsPDU *pdu, |
2022 | V9fsFidState *fidp, int32_t max_count) | |
c18e2f94 | 2023 | { |
c18e2f94 | 2024 | size_t size; |
5e4eaa79 AK |
2025 | V9fsQID qid; |
2026 | V9fsString name; | |
2027 | int len, err = 0; | |
2028 | int32_t count = 0; | |
2029 | off_t saved_dir_pos; | |
2030 | struct dirent *dent; | |
c18e2f94 | 2031 | |
5e4eaa79 AK |
2032 | /* save the directory position */ |
2033 | saved_dir_pos = v9fs_co_telldir(s, fidp); | |
2034 | if (saved_dir_pos < 0) { | |
2035 | return saved_dir_pos; | |
2036 | } | |
2037 | while (1) { | |
2038 | err = v9fs_co_readdir(s, fidp, &dent); | |
2039 | if (err || !dent) { | |
2040 | break; | |
2041 | } | |
2042 | v9fs_string_init(&name); | |
2043 | v9fs_string_sprintf(&name, "%s", dent->d_name); | |
2044 | if ((count + v9fs_readdir_data_size(&name)) > max_count) { | |
c18e2f94 | 2045 | /* Ran out of buffer. Set dir back to old position and return */ |
5e4eaa79 AK |
2046 | v9fs_co_seekdir(s, fidp, saved_dir_pos); |
2047 | v9fs_string_free(&name); | |
2048 | return count; | |
c18e2f94 | 2049 | } |
5e4eaa79 AK |
2050 | /* |
2051 | * Fill up just the path field of qid because the client uses | |
c18e2f94 SK |
2052 | * only that. To fill the entire qid structure we will have |
2053 | * to stat each dirent found, which is expensive | |
2054 | */ | |
5e4eaa79 AK |
2055 | size = MIN(sizeof(dent->d_ino), sizeof(qid.path)); |
2056 | memcpy(&qid.path, &dent->d_ino, size); | |
c18e2f94 | 2057 | /* Fill the other fields with dummy values */ |
5e4eaa79 AK |
2058 | qid.type = 0; |
2059 | qid.version = 0; | |
c18e2f94 | 2060 | |
5e4eaa79 AK |
2061 | /* 11 = 7 + 4 (7 = start offset, 4 = space for storing count) */ |
2062 | len = pdu_marshal(pdu, 11 + count, "Qqbs", | |
2063 | &qid, dent->d_off, | |
2064 | dent->d_type, &name); | |
2065 | count += len; | |
2066 | v9fs_string_free(&name); | |
2067 | saved_dir_pos = dent->d_off; | |
2068 | } | |
2069 | if (err < 0) { | |
2070 | return err; | |
2071 | } | |
2072 | return count; | |
c18e2f94 SK |
2073 | } |
2074 | ||
ff06030f | 2075 | static void v9fs_readdir(void *opaque) |
c18e2f94 SK |
2076 | { |
2077 | int32_t fid; | |
5e4eaa79 AK |
2078 | V9fsFidState *fidp; |
2079 | ssize_t retval = 0; | |
c18e2f94 | 2080 | size_t offset = 7; |
5e4eaa79 AK |
2081 | int64_t initial_offset; |
2082 | int32_t count, max_count; | |
2083 | V9fsPDU *pdu = opaque; | |
2084 | V9fsState *s = pdu->s; | |
c18e2f94 | 2085 | |
5e4eaa79 | 2086 | pdu_unmarshal(pdu, offset, "dqd", &fid, &initial_offset, &max_count); |
c18e2f94 | 2087 | |
5e4eaa79 AK |
2088 | fidp = lookup_fid(s, fid); |
2089 | if (fidp == NULL || !fidp->fs.dir) { | |
2090 | retval = -EINVAL; | |
c18e2f94 SK |
2091 | goto out; |
2092 | } | |
5e4eaa79 AK |
2093 | if (initial_offset == 0) { |
2094 | v9fs_co_rewinddir(s, fidp); | |
c18e2f94 | 2095 | } else { |
5e4eaa79 | 2096 | v9fs_co_seekdir(s, fidp, initial_offset); |
c18e2f94 | 2097 | } |
5e4eaa79 AK |
2098 | count = v9fs_do_readdir(s, pdu, fidp, max_count); |
2099 | if (count < 0) { | |
2100 | retval = count; | |
2101 | goto out; | |
2102 | } | |
2103 | retval = offset; | |
2104 | retval += pdu_marshal(pdu, offset, "d", count); | |
2105 | retval += count; | |
c18e2f94 | 2106 | out: |
5e4eaa79 | 2107 | complete_pdu(s, pdu, retval); |
c18e2f94 SK |
2108 | } |
2109 | ||
56d15a53 | 2110 | static void v9fs_write_post_pwritev(V9fsState *s, V9fsWriteState *vs, |
8449360c AL |
2111 | ssize_t err) |
2112 | { | |
2113 | if (err < 0) { | |
2114 | /* IO error return the error */ | |
2115 | err = -errno; | |
2116 | goto out; | |
2117 | } | |
2118 | vs->total += vs->len; | |
2119 | vs->sg = adjust_sg(vs->sg, vs->len, &vs->cnt); | |
2120 | if (vs->total < vs->count && vs->len > 0) { | |
2121 | do { | |
2122 | if (0) { | |
2123 | print_sg(vs->sg, vs->cnt); | |
2124 | } | |
56d15a53 SG |
2125 | vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, |
2126 | vs->off); | |
2127 | if (vs->len > 0) { | |
2128 | vs->off += vs->len; | |
2129 | } | |
8449360c AL |
2130 | } while (vs->len == -1 && errno == EINTR); |
2131 | if (vs->len == -1) { | |
2132 | err = -errno; | |
2133 | } | |
56d15a53 | 2134 | v9fs_write_post_pwritev(s, vs, err); |
8449360c AL |
2135 | return; |
2136 | } | |
2137 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", vs->total); | |
8449360c AL |
2138 | err = vs->offset; |
2139 | out: | |
2140 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2141 | g_free(vs); |
8449360c AL |
2142 | } |
2143 | ||
10b468bd AK |
2144 | static void v9fs_xattr_write(V9fsState *s, V9fsWriteState *vs) |
2145 | { | |
2146 | int i, to_copy; | |
2147 | ssize_t err = 0; | |
2148 | int write_count; | |
2149 | int64_t xattr_len; | |
2150 | ||
2151 | xattr_len = vs->fidp->fs.xattr.len; | |
2152 | write_count = xattr_len - vs->off; | |
2153 | if (write_count > vs->count) { | |
2154 | write_count = vs->count; | |
2155 | } else if (write_count < 0) { | |
2156 | /* | |
2157 | * write beyond XATTR value len specified in | |
2158 | * xattrcreate | |
2159 | */ | |
2160 | err = -ENOSPC; | |
2161 | goto out; | |
2162 | } | |
2163 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "d", write_count); | |
2164 | err = vs->offset; | |
2165 | vs->fidp->fs.xattr.copied_len += write_count; | |
2166 | /* | |
2167 | * Now copy the content from sg list | |
2168 | */ | |
2169 | for (i = 0; i < vs->cnt; i++) { | |
2170 | if (write_count > vs->sg[i].iov_len) { | |
2171 | to_copy = vs->sg[i].iov_len; | |
2172 | } else { | |
2173 | to_copy = write_count; | |
2174 | } | |
2175 | memcpy((char *)vs->fidp->fs.xattr.value + vs->off, | |
2176 | vs->sg[i].iov_base, to_copy); | |
2177 | /* updating vs->off since we are not using below */ | |
2178 | vs->off += to_copy; | |
2179 | write_count -= to_copy; | |
2180 | } | |
2181 | out: | |
2182 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2183 | g_free(vs); |
10b468bd AK |
2184 | } |
2185 | ||
ff06030f | 2186 | static void v9fs_write(void *opaque) |
9f107513 | 2187 | { |
ff06030f VJ |
2188 | V9fsPDU *pdu = opaque; |
2189 | V9fsState *s = pdu->s; | |
8449360c AL |
2190 | int32_t fid; |
2191 | V9fsWriteState *vs; | |
2192 | ssize_t err; | |
2193 | ||
7267c094 | 2194 | vs = g_malloc(sizeof(*vs)); |
8449360c AL |
2195 | |
2196 | vs->pdu = pdu; | |
2197 | vs->offset = 7; | |
2198 | vs->sg = vs->iov; | |
2199 | vs->total = 0; | |
2200 | vs->len = 0; | |
2201 | ||
2202 | pdu_unmarshal(vs->pdu, vs->offset, "dqdv", &fid, &vs->off, &vs->count, | |
10b468bd | 2203 | vs->sg, &vs->cnt); |
8449360c AL |
2204 | |
2205 | vs->fidp = lookup_fid(s, fid); | |
2206 | if (vs->fidp == NULL) { | |
2207 | err = -EINVAL; | |
2208 | goto out; | |
9f107513 | 2209 | } |
8449360c | 2210 | |
10b468bd AK |
2211 | if (vs->fidp->fid_type == P9_FID_FILE) { |
2212 | if (vs->fidp->fs.fd == -1) { | |
2213 | err = -EINVAL; | |
2214 | goto out; | |
2215 | } | |
2216 | } else if (vs->fidp->fid_type == P9_FID_XATTR) { | |
2217 | /* | |
2218 | * setxattr operation | |
2219 | */ | |
2220 | v9fs_xattr_write(s, vs); | |
2221 | return; | |
2222 | } else { | |
8449360c AL |
2223 | err = -EINVAL; |
2224 | goto out; | |
2225 | } | |
56d15a53 SG |
2226 | vs->sg = cap_sg(vs->sg, vs->count, &vs->cnt); |
2227 | if (vs->total <= vs->count) { | |
2228 | vs->len = v9fs_do_pwritev(s, vs->fidp->fs.fd, vs->sg, vs->cnt, vs->off); | |
2229 | if (vs->len > 0) { | |
2230 | vs->off += vs->len; | |
2231 | } | |
2232 | err = vs->len; | |
2233 | v9fs_write_post_pwritev(s, vs, err); | |
2234 | } | |
8449360c | 2235 | return; |
8449360c AL |
2236 | out: |
2237 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2238 | g_free(vs); |
9f107513 AL |
2239 | } |
2240 | ||
5e94c103 | 2241 | static void v9fs_create_post_getiounit(V9fsState *s, V9fsCreateState *vs) |
c494dd6f | 2242 | { |
5e94c103 MK |
2243 | int err; |
2244 | v9fs_string_copy(&vs->fidp->path, &vs->fullname); | |
2245 | stat_to_qid(&vs->stbuf, &vs->qid); | |
c494dd6f | 2246 | |
5e94c103 MK |
2247 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Qd", &vs->qid, vs->iounit); |
2248 | err = vs->offset; | |
c494dd6f | 2249 | |
5e94c103 MK |
2250 | complete_pdu(s, vs->pdu, err); |
2251 | v9fs_string_free(&vs->name); | |
2252 | v9fs_string_free(&vs->extension); | |
2253 | v9fs_string_free(&vs->fullname); | |
7267c094 | 2254 | g_free(vs); |
5e94c103 MK |
2255 | } |
2256 | ||
2257 | static void v9fs_post_create(V9fsState *s, V9fsCreateState *vs, int err) | |
2258 | { | |
2259 | if (err == 0) { | |
2260 | vs->iounit = get_iounit(s, &vs->fidp->path); | |
2261 | v9fs_create_post_getiounit(s, vs); | |
2262 | return; | |
c494dd6f AL |
2263 | } |
2264 | ||
2265 | complete_pdu(s, vs->pdu, err); | |
2266 | v9fs_string_free(&vs->name); | |
2267 | v9fs_string_free(&vs->extension); | |
2268 | v9fs_string_free(&vs->fullname); | |
7267c094 | 2269 | g_free(vs); |
c494dd6f AL |
2270 | } |
2271 | ||
2272 | static void v9fs_create_post_perms(V9fsState *s, V9fsCreateState *vs, int err) | |
2273 | { | |
2274 | if (err) { | |
2275 | err = -errno; | |
2276 | } | |
2277 | v9fs_post_create(s, vs, err); | |
2278 | } | |
2279 | ||
2280 | static void v9fs_create_post_opendir(V9fsState *s, V9fsCreateState *vs, | |
2281 | int err) | |
2282 | { | |
d62dbb51 | 2283 | if (!vs->fidp->fs.dir) { |
c494dd6f AL |
2284 | err = -errno; |
2285 | } | |
d62dbb51 | 2286 | vs->fidp->fid_type = P9_FID_DIR; |
c494dd6f AL |
2287 | v9fs_post_create(s, vs, err); |
2288 | } | |
2289 | ||
2290 | static void v9fs_create_post_dir_lstat(V9fsState *s, V9fsCreateState *vs, | |
2291 | int err) | |
2292 | { | |
2293 | if (err) { | |
2294 | err = -errno; | |
2295 | goto out; | |
2296 | } | |
2297 | ||
d62dbb51 | 2298 | vs->fidp->fs.dir = v9fs_do_opendir(s, &vs->fullname); |
c494dd6f AL |
2299 | v9fs_create_post_opendir(s, vs, err); |
2300 | return; | |
2301 | ||
2302 | out: | |
2303 | v9fs_post_create(s, vs, err); | |
2304 | } | |
2305 | ||
2306 | static void v9fs_create_post_mkdir(V9fsState *s, V9fsCreateState *vs, int err) | |
2307 | { | |
e84861f7 | 2308 | if (err < 0) { |
c494dd6f AL |
2309 | goto out; |
2310 | } | |
2311 | ||
2312 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2313 | v9fs_create_post_dir_lstat(s, vs, err); | |
2314 | return; | |
2315 | ||
2316 | out: | |
2317 | v9fs_post_create(s, vs, err); | |
2318 | } | |
2319 | ||
c494dd6f AL |
2320 | static void v9fs_create_post_fstat(V9fsState *s, V9fsCreateState *vs, int err) |
2321 | { | |
2322 | if (err) { | |
d62dbb51 AK |
2323 | vs->fidp->fid_type = P9_FID_NONE; |
2324 | close(vs->fidp->fs.fd); | |
c494dd6f AL |
2325 | err = -errno; |
2326 | } | |
c494dd6f AL |
2327 | v9fs_post_create(s, vs, err); |
2328 | return; | |
2329 | } | |
2330 | ||
2331 | static void v9fs_create_post_open2(V9fsState *s, V9fsCreateState *vs, int err) | |
2332 | { | |
d62dbb51 | 2333 | if (vs->fidp->fs.fd == -1) { |
c494dd6f AL |
2334 | err = -errno; |
2335 | goto out; | |
2336 | } | |
d62dbb51 AK |
2337 | vs->fidp->fid_type = P9_FID_FILE; |
2338 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
c494dd6f AL |
2339 | v9fs_create_post_fstat(s, vs, err); |
2340 | ||
2341 | return; | |
2342 | ||
2343 | out: | |
2344 | v9fs_post_create(s, vs, err); | |
2345 | ||
2346 | } | |
2347 | ||
2348 | static void v9fs_create_post_lstat(V9fsState *s, V9fsCreateState *vs, int err) | |
2349 | { | |
2350 | ||
2351 | if (err == 0 || errno != ENOENT) { | |
2352 | err = -errno; | |
2353 | goto out; | |
2354 | } | |
2355 | ||
2356 | if (vs->perm & P9_STAT_MODE_DIR) { | |
e84861f7 | 2357 | err = v9fs_co_mkdir(s, vs->fullname.data, vs->perm & 0777, |
b67592ea | 2358 | vs->fidp->uid, -1); |
c494dd6f AL |
2359 | v9fs_create_post_mkdir(s, vs, err); |
2360 | } else if (vs->perm & P9_STAT_MODE_SYMLINK) { | |
08c60fc9 VJ |
2361 | err = v9fs_do_symlink(s, vs->fidp, vs->extension.data, |
2362 | vs->fullname.data, -1); | |
c494dd6f AL |
2363 | v9fs_create_post_perms(s, vs, err); |
2364 | } else if (vs->perm & P9_STAT_MODE_LINK) { | |
2365 | int32_t nfid = atoi(vs->extension.data); | |
2366 | V9fsFidState *nfidp = lookup_fid(s, nfid); | |
2367 | if (nfidp == NULL) { | |
2368 | err = -errno; | |
2369 | v9fs_post_create(s, vs, err); | |
2370 | } | |
2371 | err = v9fs_do_link(s, &nfidp->path, &vs->fullname); | |
2372 | v9fs_create_post_perms(s, vs, err); | |
2373 | } else if (vs->perm & P9_STAT_MODE_DEVICE) { | |
2374 | char ctype; | |
2375 | uint32_t major, minor; | |
2376 | mode_t nmode = 0; | |
2377 | ||
2378 | if (sscanf(vs->extension.data, "%c %u %u", &ctype, &major, | |
2379 | &minor) != 3) { | |
2380 | err = -errno; | |
2381 | v9fs_post_create(s, vs, err); | |
2382 | } | |
2383 | ||
2384 | switch (ctype) { | |
2385 | case 'c': | |
2386 | nmode = S_IFCHR; | |
2387 | break; | |
2388 | case 'b': | |
2389 | nmode = S_IFBLK; | |
2390 | break; | |
2391 | default: | |
2392 | err = -EIO; | |
2393 | v9fs_post_create(s, vs, err); | |
2394 | } | |
2395 | ||
2396 | nmode |= vs->perm & 0777; | |
5268cecc MK |
2397 | err = v9fs_do_mknod(s, vs->fullname.data, nmode, |
2398 | makedev(major, minor), vs->fidp->uid, -1); | |
c494dd6f AL |
2399 | v9fs_create_post_perms(s, vs, err); |
2400 | } else if (vs->perm & P9_STAT_MODE_NAMED_PIPE) { | |
5268cecc MK |
2401 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFIFO | (vs->perm & 0777), |
2402 | 0, vs->fidp->uid, -1); | |
c494dd6f AL |
2403 | v9fs_post_create(s, vs, err); |
2404 | } else if (vs->perm & P9_STAT_MODE_SOCKET) { | |
5268cecc MK |
2405 | err = v9fs_do_mknod(s, vs->fullname.data, S_IFSOCK | (vs->perm & 0777), |
2406 | 0, vs->fidp->uid, -1); | |
63729c36 | 2407 | v9fs_post_create(s, vs, err); |
c494dd6f | 2408 | } else { |
d62dbb51 | 2409 | vs->fidp->fs.fd = v9fs_do_open2(s, vs->fullname.data, vs->fidp->uid, |
c1568af5 VJ |
2410 | -1, omode_to_uflags(vs->mode)|O_CREAT, vs->perm); |
2411 | ||
c494dd6f AL |
2412 | v9fs_create_post_open2(s, vs, err); |
2413 | } | |
2414 | ||
2415 | return; | |
2416 | ||
2417 | out: | |
2418 | v9fs_post_create(s, vs, err); | |
2419 | } | |
2420 | ||
ff06030f | 2421 | static void v9fs_create(void *opaque) |
9f107513 | 2422 | { |
ff06030f VJ |
2423 | V9fsPDU *pdu = opaque; |
2424 | V9fsState *s = pdu->s; | |
c494dd6f AL |
2425 | int32_t fid; |
2426 | V9fsCreateState *vs; | |
2427 | int err = 0; | |
2428 | ||
7267c094 | 2429 | vs = g_malloc(sizeof(*vs)); |
c494dd6f AL |
2430 | vs->pdu = pdu; |
2431 | vs->offset = 7; | |
2432 | ||
2433 | v9fs_string_init(&vs->fullname); | |
2434 | ||
2435 | pdu_unmarshal(vs->pdu, vs->offset, "dsdbs", &fid, &vs->name, | |
2436 | &vs->perm, &vs->mode, &vs->extension); | |
2437 | ||
2438 | vs->fidp = lookup_fid(s, fid); | |
2439 | if (vs->fidp == NULL) { | |
2440 | err = -EINVAL; | |
2441 | goto out; | |
9f107513 | 2442 | } |
c494dd6f AL |
2443 | |
2444 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->fidp->path.data, | |
2445 | vs->name.data); | |
2446 | ||
2447 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2448 | v9fs_create_post_lstat(s, vs, err); | |
2449 | return; | |
2450 | ||
2451 | out: | |
2452 | complete_pdu(s, vs->pdu, err); | |
2453 | v9fs_string_free(&vs->name); | |
2454 | v9fs_string_free(&vs->extension); | |
7267c094 | 2455 | g_free(vs); |
9f107513 AL |
2456 | } |
2457 | ||
08c60fc9 VJ |
2458 | static void v9fs_post_symlink(V9fsState *s, V9fsSymlinkState *vs, int err) |
2459 | { | |
2460 | if (err == 0) { | |
2461 | stat_to_qid(&vs->stbuf, &vs->qid); | |
2462 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "Q", &vs->qid); | |
2463 | err = vs->offset; | |
2464 | } else { | |
2465 | err = -errno; | |
2466 | } | |
2467 | complete_pdu(s, vs->pdu, err); | |
2468 | v9fs_string_free(&vs->name); | |
2469 | v9fs_string_free(&vs->symname); | |
2470 | v9fs_string_free(&vs->fullname); | |
7267c094 | 2471 | g_free(vs); |
08c60fc9 VJ |
2472 | } |
2473 | ||
2474 | static void v9fs_symlink_post_do_symlink(V9fsState *s, V9fsSymlinkState *vs, | |
2475 | int err) | |
2476 | { | |
2477 | if (err) { | |
2478 | goto out; | |
2479 | } | |
2480 | err = v9fs_do_lstat(s, &vs->fullname, &vs->stbuf); | |
2481 | out: | |
2482 | v9fs_post_symlink(s, vs, err); | |
2483 | } | |
2484 | ||
ff06030f | 2485 | static void v9fs_symlink(void *opaque) |
08c60fc9 | 2486 | { |
ff06030f VJ |
2487 | V9fsPDU *pdu = opaque; |
2488 | V9fsState *s = pdu->s; | |
08c60fc9 VJ |
2489 | int32_t dfid; |
2490 | V9fsSymlinkState *vs; | |
2491 | int err = 0; | |
2492 | gid_t gid; | |
2493 | ||
7267c094 | 2494 | vs = g_malloc(sizeof(*vs)); |
08c60fc9 VJ |
2495 | vs->pdu = pdu; |
2496 | vs->offset = 7; | |
2497 | ||
2498 | v9fs_string_init(&vs->fullname); | |
2499 | ||
2500 | pdu_unmarshal(vs->pdu, vs->offset, "dssd", &dfid, &vs->name, | |
2501 | &vs->symname, &gid); | |
2502 | ||
2503 | vs->dfidp = lookup_fid(s, dfid); | |
2504 | if (vs->dfidp == NULL) { | |
2505 | err = -EINVAL; | |
2506 | goto out; | |
2507 | } | |
2508 | ||
2509 | v9fs_string_sprintf(&vs->fullname, "%s/%s", vs->dfidp->path.data, | |
2510 | vs->name.data); | |
2511 | err = v9fs_do_symlink(s, vs->dfidp, vs->symname.data, | |
2512 | vs->fullname.data, gid); | |
2513 | v9fs_symlink_post_do_symlink(s, vs, err); | |
2514 | return; | |
2515 | ||
2516 | out: | |
2517 | complete_pdu(s, vs->pdu, err); | |
2518 | v9fs_string_free(&vs->name); | |
2519 | v9fs_string_free(&vs->symname); | |
7267c094 | 2520 | g_free(vs); |
08c60fc9 VJ |
2521 | } |
2522 | ||
ff06030f | 2523 | static void v9fs_flush(void *opaque) |
9f107513 | 2524 | { |
ff06030f VJ |
2525 | V9fsPDU *pdu = opaque; |
2526 | V9fsState *s = pdu->s; | |
9c5e9d89 AL |
2527 | /* A nop call with no return */ |
2528 | complete_pdu(s, pdu, 7); | |
ff06030f | 2529 | return; |
9f107513 AL |
2530 | } |
2531 | ||
ff06030f | 2532 | static void v9fs_link(void *opaque) |
b2c224be | 2533 | { |
ff06030f VJ |
2534 | V9fsPDU *pdu = opaque; |
2535 | V9fsState *s = pdu->s; | |
b2c224be VJ |
2536 | int32_t dfid, oldfid; |
2537 | V9fsFidState *dfidp, *oldfidp; | |
2538 | V9fsString name, fullname; | |
2539 | size_t offset = 7; | |
2540 | int err = 0; | |
2541 | ||
2542 | v9fs_string_init(&fullname); | |
2543 | ||
2544 | pdu_unmarshal(pdu, offset, "dds", &dfid, &oldfid, &name); | |
2545 | ||
2546 | dfidp = lookup_fid(s, dfid); | |
2547 | if (dfidp == NULL) { | |
2548 | err = -errno; | |
2549 | goto out; | |
2550 | } | |
2551 | ||
2552 | oldfidp = lookup_fid(s, oldfid); | |
2553 | if (oldfidp == NULL) { | |
2554 | err = -errno; | |
2555 | goto out; | |
2556 | } | |
2557 | ||
2558 | v9fs_string_sprintf(&fullname, "%s/%s", dfidp->path.data, name.data); | |
2559 | err = offset; | |
2560 | err = v9fs_do_link(s, &oldfidp->path, &fullname); | |
2561 | if (err) { | |
2562 | err = -errno; | |
2563 | } | |
2564 | v9fs_string_free(&fullname); | |
2565 | ||
2566 | out: | |
2567 | v9fs_string_free(&name); | |
2568 | complete_pdu(s, pdu, err); | |
2569 | } | |
2570 | ||
ff06030f | 2571 | static void v9fs_remove(void *opaque) |
9f107513 | 2572 | { |
5bae1900 | 2573 | int32_t fid; |
5bae1900 | 2574 | int err = 0; |
ae1ef571 VJ |
2575 | size_t offset = 7; |
2576 | V9fsFidState *fidp; | |
2577 | V9fsPDU *pdu = opaque; | |
5bae1900 | 2578 | |
ae1ef571 | 2579 | pdu_unmarshal(pdu, offset, "d", &fid); |
5bae1900 | 2580 | |
ae1ef571 VJ |
2581 | fidp = lookup_fid(pdu->s, fid); |
2582 | if (fidp == NULL) { | |
5bae1900 AL |
2583 | err = -EINVAL; |
2584 | goto out; | |
9f107513 | 2585 | } |
ae1ef571 VJ |
2586 | err = v9fs_co_remove(pdu->s, &fidp->path); |
2587 | if (!err) { | |
2588 | err = offset; | |
2589 | } | |
5bae1900 | 2590 | |
ae1ef571 VJ |
2591 | /* For TREMOVE we need to clunk the fid even on failed remove */ |
2592 | free_fid(pdu->s, fidp->fid); | |
5bae1900 | 2593 | out: |
ae1ef571 | 2594 | complete_pdu(pdu->s, pdu, err); |
9f107513 AL |
2595 | } |
2596 | ||
8cf89e00 AL |
2597 | static void v9fs_wstat_post_truncate(V9fsState *s, V9fsWstatState *vs, int err) |
2598 | { | |
2599 | if (err < 0) { | |
2600 | goto out; | |
2601 | } | |
2602 | ||
2603 | err = vs->offset; | |
2604 | ||
2605 | out: | |
2606 | v9fs_stat_free(&vs->v9stat); | |
2607 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2608 | g_free(vs); |
8cf89e00 AL |
2609 | } |
2610 | ||
2611 | static void v9fs_wstat_post_rename(V9fsState *s, V9fsWstatState *vs, int err) | |
2612 | { | |
2613 | if (err < 0) { | |
2614 | goto out; | |
2615 | } | |
8cf89e00 AL |
2616 | if (vs->v9stat.length != -1) { |
2617 | if (v9fs_do_truncate(s, &vs->fidp->path, vs->v9stat.length) < 0) { | |
2618 | err = -errno; | |
2619 | } | |
2620 | } | |
2621 | v9fs_wstat_post_truncate(s, vs, err); | |
2622 | return; | |
2623 | ||
2624 | out: | |
2625 | v9fs_stat_free(&vs->v9stat); | |
2626 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2627 | g_free(vs); |
8cf89e00 AL |
2628 | } |
2629 | ||
930b1e17 AK |
2630 | static int v9fs_complete_rename(V9fsState *s, V9fsFidState *fidp, |
2631 | int32_t newdirfid, V9fsString *name) | |
8cf89e00 | 2632 | { |
930b1e17 | 2633 | char *end; |
c7b4b0b3 MK |
2634 | int err = 0; |
2635 | char *old_name, *new_name; | |
8cf89e00 | 2636 | |
930b1e17 | 2637 | if (newdirfid != -1) { |
c7b4b0b3 | 2638 | V9fsFidState *dirfidp; |
930b1e17 | 2639 | dirfidp = lookup_fid(s, newdirfid); |
c7b4b0b3 MK |
2640 | if (dirfidp == NULL) { |
2641 | err = -ENOENT; | |
2642 | goto out; | |
2643 | } | |
d62dbb51 | 2644 | BUG_ON(dirfidp->fid_type != P9_FID_NONE); |
8cf89e00 | 2645 | |
7267c094 | 2646 | new_name = g_malloc0(dirfidp->path.size + name->size + 2); |
c7b4b0b3 MK |
2647 | |
2648 | strcpy(new_name, dirfidp->path.data); | |
2649 | strcat(new_name, "/"); | |
930b1e17 | 2650 | strcat(new_name + dirfidp->path.size, name->data); |
c7b4b0b3 | 2651 | } else { |
930b1e17 | 2652 | old_name = fidp->path.data; |
8cf89e00 AL |
2653 | end = strrchr(old_name, '/'); |
2654 | if (end) { | |
2655 | end++; | |
2656 | } else { | |
2657 | end = old_name; | |
2658 | } | |
7267c094 | 2659 | new_name = g_malloc0(end - old_name + name->size + 1); |
8cf89e00 | 2660 | |
c7b4b0b3 | 2661 | strncat(new_name, old_name, end - old_name); |
930b1e17 | 2662 | strncat(new_name + (end - old_name), name->data, name->size); |
c7b4b0b3 | 2663 | } |
8cf89e00 | 2664 | |
930b1e17 AK |
2665 | v9fs_string_free(name); |
2666 | name->data = new_name; | |
2667 | name->size = strlen(new_name); | |
8cf89e00 | 2668 | |
930b1e17 AK |
2669 | if (strcmp(new_name, fidp->path.data) != 0) { |
2670 | err = v9fs_co_rename(s, &fidp->path, name); | |
2671 | if (err < 0) { | |
2672 | goto out; | |
2673 | } | |
2674 | V9fsFidState *tfidp; | |
2675 | /* | |
2676 | * Fixup fid's pointing to the old name to | |
2677 | * start pointing to the new name | |
2678 | */ | |
2679 | for (tfidp = s->fid_list; tfidp; tfidp = tfidp->next) { | |
2680 | if (fidp == tfidp) { | |
2681 | /* | |
2682 | * we replace name of this fid towards the end | |
2683 | * so that our below strcmp will work | |
2684 | */ | |
2685 | continue; | |
2686 | } | |
2687 | if (v9fs_path_is_ancestor(&fidp->path, &tfidp->path)) { | |
2688 | /* replace the name */ | |
2689 | v9fs_fix_path(&tfidp->path, name, strlen(fidp->path.data)); | |
8cf89e00 AL |
2690 | } |
2691 | } | |
930b1e17 | 2692 | v9fs_string_copy(&fidp->path, name); |
8cf89e00 | 2693 | } |
c7b4b0b3 | 2694 | out: |
c7b4b0b3 MK |
2695 | return err; |
2696 | } | |
2697 | ||
c7b4b0b3 MK |
2698 | static void v9fs_wstat_post_chown(V9fsState *s, V9fsWstatState *vs, int err) |
2699 | { | |
2700 | if (err < 0) { | |
2701 | goto out; | |
2702 | } | |
2703 | ||
2704 | if (vs->v9stat.name.size != 0) { | |
930b1e17 | 2705 | err = v9fs_complete_rename(s, vs->fidp, -1, &vs->v9stat.name); |
c7b4b0b3 | 2706 | } |
8cf89e00 AL |
2707 | v9fs_wstat_post_rename(s, vs, err); |
2708 | return; | |
2709 | ||
2710 | out: | |
2711 | v9fs_stat_free(&vs->v9stat); | |
2712 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2713 | g_free(vs); |
8cf89e00 AL |
2714 | } |
2715 | ||
ff06030f | 2716 | static void v9fs_rename(void *opaque) |
c7b4b0b3 MK |
2717 | { |
2718 | int32_t fid; | |
c7b4b0b3 | 2719 | ssize_t err = 0; |
930b1e17 AK |
2720 | size_t offset = 7; |
2721 | V9fsString name; | |
2722 | int32_t newdirfid; | |
2723 | V9fsFidState *fidp; | |
2724 | V9fsPDU *pdu = opaque; | |
2725 | V9fsState *s = pdu->s; | |
c7b4b0b3 | 2726 | |
930b1e17 | 2727 | pdu_unmarshal(pdu, offset, "dds", &fid, &newdirfid, &name); |
c7b4b0b3 | 2728 | |
930b1e17 AK |
2729 | fidp = lookup_fid(s, fid); |
2730 | if (fidp == NULL) { | |
c7b4b0b3 MK |
2731 | err = -ENOENT; |
2732 | goto out; | |
2733 | } | |
930b1e17 | 2734 | BUG_ON(fidp->fid_type != P9_FID_NONE); |
c7b4b0b3 | 2735 | |
930b1e17 AK |
2736 | err = v9fs_complete_rename(s, fidp, newdirfid, &name); |
2737 | if (!err) { | |
2738 | err = offset; | |
2739 | } | |
c7b4b0b3 | 2740 | out: |
930b1e17 AK |
2741 | complete_pdu(s, pdu, err); |
2742 | v9fs_string_free(&name); | |
c7b4b0b3 MK |
2743 | } |
2744 | ||
8cf89e00 AL |
2745 | static void v9fs_wstat_post_utime(V9fsState *s, V9fsWstatState *vs, int err) |
2746 | { | |
2747 | if (err < 0) { | |
2748 | goto out; | |
2749 | } | |
2750 | ||
f7613bee | 2751 | if (vs->v9stat.n_gid != -1 || vs->v9stat.n_uid != -1) { |
8cf89e00 AL |
2752 | if (v9fs_do_chown(s, &vs->fidp->path, vs->v9stat.n_uid, |
2753 | vs->v9stat.n_gid)) { | |
2754 | err = -errno; | |
2755 | } | |
2756 | } | |
2757 | v9fs_wstat_post_chown(s, vs, err); | |
2758 | return; | |
2759 | ||
2760 | out: | |
2761 | v9fs_stat_free(&vs->v9stat); | |
2762 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2763 | g_free(vs); |
8cf89e00 AL |
2764 | } |
2765 | ||
2766 | static void v9fs_wstat_post_chmod(V9fsState *s, V9fsWstatState *vs, int err) | |
2767 | { | |
2768 | if (err < 0) { | |
2769 | goto out; | |
2770 | } | |
2771 | ||
74bc02b2 | 2772 | if (vs->v9stat.mtime != -1 || vs->v9stat.atime != -1) { |
8fc39ae4 SK |
2773 | struct timespec times[2]; |
2774 | if (vs->v9stat.atime != -1) { | |
2775 | times[0].tv_sec = vs->v9stat.atime; | |
2776 | times[0].tv_nsec = 0; | |
2777 | } else { | |
2778 | times[0].tv_nsec = UTIME_OMIT; | |
2779 | } | |
2780 | if (vs->v9stat.mtime != -1) { | |
2781 | times[1].tv_sec = vs->v9stat.mtime; | |
2782 | times[1].tv_nsec = 0; | |
2783 | } else { | |
2784 | times[1].tv_nsec = UTIME_OMIT; | |
2785 | } | |
2786 | ||
2787 | if (v9fs_do_utimensat(s, &vs->fidp->path, times)) { | |
8cf89e00 AL |
2788 | err = -errno; |
2789 | } | |
2790 | } | |
2791 | ||
2792 | v9fs_wstat_post_utime(s, vs, err); | |
2793 | return; | |
2794 | ||
2795 | out: | |
2796 | v9fs_stat_free(&vs->v9stat); | |
2797 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2798 | g_free(vs); |
8cf89e00 AL |
2799 | } |
2800 | ||
2801 | static void v9fs_wstat_post_fsync(V9fsState *s, V9fsWstatState *vs, int err) | |
2802 | { | |
2803 | if (err == -1) { | |
2804 | err = -errno; | |
2805 | } | |
2806 | v9fs_stat_free(&vs->v9stat); | |
2807 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2808 | g_free(vs); |
8cf89e00 AL |
2809 | } |
2810 | ||
2811 | static void v9fs_wstat_post_lstat(V9fsState *s, V9fsWstatState *vs, int err) | |
2812 | { | |
2813 | uint32_t v9_mode; | |
2814 | ||
2815 | if (err == -1) { | |
2816 | err = -errno; | |
2817 | goto out; | |
2818 | } | |
2819 | ||
2820 | v9_mode = stat_to_v9mode(&vs->stbuf); | |
2821 | ||
2822 | if ((vs->v9stat.mode & P9_STAT_MODE_TYPE_BITS) != | |
2823 | (v9_mode & P9_STAT_MODE_TYPE_BITS)) { | |
2824 | /* Attempting to change the type */ | |
2825 | err = -EIO; | |
2826 | goto out; | |
2827 | } | |
2828 | ||
2829 | if (v9fs_do_chmod(s, &vs->fidp->path, v9mode_to_mode(vs->v9stat.mode, | |
2830 | &vs->v9stat.extension))) { | |
2831 | err = -errno; | |
2832 | } | |
2833 | v9fs_wstat_post_chmod(s, vs, err); | |
2834 | return; | |
2835 | ||
2836 | out: | |
2837 | v9fs_stat_free(&vs->v9stat); | |
2838 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2839 | g_free(vs); |
8cf89e00 AL |
2840 | } |
2841 | ||
ff06030f | 2842 | static void v9fs_wstat(void *opaque) |
9f107513 | 2843 | { |
ff06030f VJ |
2844 | V9fsPDU *pdu = opaque; |
2845 | V9fsState *s = pdu->s; | |
8cf89e00 AL |
2846 | int32_t fid; |
2847 | V9fsWstatState *vs; | |
2848 | int err = 0; | |
2849 | ||
7267c094 | 2850 | vs = g_malloc(sizeof(*vs)); |
8cf89e00 AL |
2851 | vs->pdu = pdu; |
2852 | vs->offset = 7; | |
2853 | ||
2854 | pdu_unmarshal(pdu, vs->offset, "dwS", &fid, &vs->unused, &vs->v9stat); | |
2855 | ||
2856 | vs->fidp = lookup_fid(s, fid); | |
2857 | if (vs->fidp == NULL) { | |
2858 | err = -EINVAL; | |
2859 | goto out; | |
9f107513 | 2860 | } |
8cf89e00 AL |
2861 | |
2862 | /* do we need to sync the file? */ | |
2863 | if (donttouch_stat(&vs->v9stat)) { | |
49594973 | 2864 | err = v9fs_do_fsync(s, vs->fidp->fs.fd, 0); |
8cf89e00 AL |
2865 | v9fs_wstat_post_fsync(s, vs, err); |
2866 | return; | |
2867 | } | |
2868 | ||
2869 | if (vs->v9stat.mode != -1) { | |
2870 | err = v9fs_do_lstat(s, &vs->fidp->path, &vs->stbuf); | |
2871 | v9fs_wstat_post_lstat(s, vs, err); | |
2872 | return; | |
2873 | } | |
2874 | ||
2875 | v9fs_wstat_post_chmod(s, vs, err); | |
2876 | return; | |
2877 | ||
2878 | out: | |
2879 | v9fs_stat_free(&vs->v9stat); | |
2880 | complete_pdu(s, vs->pdu, err); | |
7267c094 | 2881 | g_free(vs); |
9f107513 AL |
2882 | } |
2883 | ||
88a4763e AK |
2884 | static int v9fs_fill_statfs(V9fsState *s, V9fsPDU *pdu, struct statfs *stbuf) |
2885 | { | |
2886 | uint32_t f_type; | |
2887 | uint32_t f_bsize; | |
2888 | uint64_t f_blocks; | |
2889 | uint64_t f_bfree; | |
2890 | uint64_t f_bavail; | |
2891 | uint64_t f_files; | |
2892 | uint64_t f_ffree; | |
2893 | uint64_t fsid_val; | |
2894 | uint32_t f_namelen; | |
2895 | size_t offset = 7; | |
5e94c103 MK |
2896 | int32_t bsize_factor; |
2897 | ||
5e94c103 MK |
2898 | /* |
2899 | * compute bsize factor based on host file system block size | |
2900 | * and client msize | |
2901 | */ | |
88a4763e | 2902 | bsize_factor = (s->msize - P9_IOHDRSZ)/stbuf->f_bsize; |
5e94c103 MK |
2903 | if (!bsize_factor) { |
2904 | bsize_factor = 1; | |
2905 | } | |
88a4763e AK |
2906 | f_type = stbuf->f_type; |
2907 | f_bsize = stbuf->f_bsize; | |
2908 | f_bsize *= bsize_factor; | |
5e94c103 MK |
2909 | /* |
2910 | * f_bsize is adjusted(multiplied) by bsize factor, so we need to | |
2911 | * adjust(divide) the number of blocks, free blocks and available | |
2912 | * blocks by bsize factor | |
2913 | */ | |
88a4763e AK |
2914 | f_blocks = stbuf->f_blocks/bsize_factor; |
2915 | f_bfree = stbuf->f_bfree/bsize_factor; | |
2916 | f_bavail = stbuf->f_bavail/bsize_factor; | |
2917 | f_files = stbuf->f_files; | |
2918 | f_ffree = stbuf->f_ffree; | |
2919 | fsid_val = (unsigned int) stbuf->f_fsid.__val[0] | | |
2920 | (unsigned long long)stbuf->f_fsid.__val[1] << 32; | |
2921 | f_namelen = stbuf->f_namelen; | |
be940c87 | 2922 | |
88a4763e AK |
2923 | return pdu_marshal(pdu, offset, "ddqqqqqqd", |
2924 | f_type, f_bsize, f_blocks, f_bfree, | |
2925 | f_bavail, f_files, f_ffree, | |
2926 | fsid_val, f_namelen); | |
be940c87 MK |
2927 | } |
2928 | ||
ff06030f | 2929 | static void v9fs_statfs(void *opaque) |
be940c87 | 2930 | { |
88a4763e AK |
2931 | int32_t fid; |
2932 | ssize_t retval = 0; | |
2933 | size_t offset = 7; | |
2934 | V9fsFidState *fidp; | |
2935 | struct statfs stbuf; | |
ff06030f VJ |
2936 | V9fsPDU *pdu = opaque; |
2937 | V9fsState *s = pdu->s; | |
be940c87 | 2938 | |
88a4763e AK |
2939 | pdu_unmarshal(pdu, offset, "d", &fid); |
2940 | fidp = lookup_fid(s, fid); | |
2941 | if (fidp == NULL) { | |
2942 | retval = -ENOENT; | |
be940c87 MK |
2943 | goto out; |
2944 | } | |
88a4763e AK |
2945 | retval = v9fs_co_statfs(s, &fidp->path, &stbuf); |
2946 | if (retval < 0) { | |
2947 | goto out; | |
2948 | } | |
2949 | retval = offset; | |
2950 | retval += v9fs_fill_statfs(s, pdu, &stbuf); | |
be940c87 | 2951 | out: |
88a4763e | 2952 | complete_pdu(s, pdu, retval); |
ff06030f | 2953 | return; |
be940c87 MK |
2954 | } |
2955 | ||
ff06030f | 2956 | static void v9fs_mknod(void *opaque) |
5268cecc | 2957 | { |
1b733fed AK |
2958 | |
2959 | int mode; | |
2960 | gid_t gid; | |
5268cecc | 2961 | int32_t fid; |
1b733fed | 2962 | V9fsQID qid; |
5268cecc | 2963 | int err = 0; |
5268cecc | 2964 | int major, minor; |
1b733fed AK |
2965 | size_t offset = 7; |
2966 | V9fsString name; | |
2967 | struct stat stbuf; | |
2968 | V9fsString fullname; | |
2969 | V9fsFidState *fidp; | |
2970 | V9fsPDU *pdu = opaque; | |
2971 | V9fsState *s = pdu->s; | |
5268cecc | 2972 | |
1b733fed AK |
2973 | v9fs_string_init(&fullname); |
2974 | pdu_unmarshal(pdu, offset, "dsdddd", &fid, &name, &mode, | |
2975 | &major, &minor, &gid); | |
5268cecc MK |
2976 | |
2977 | fidp = lookup_fid(s, fid); | |
2978 | if (fidp == NULL) { | |
2979 | err = -ENOENT; | |
2980 | goto out; | |
2981 | } | |
1b733fed AK |
2982 | v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); |
2983 | err = v9fs_co_mknod(s, &fullname, fidp->uid, gid, | |
2984 | makedev(major, minor), mode); | |
2985 | if (err < 0) { | |
2986 | goto out; | |
2987 | } | |
2988 | err = v9fs_co_lstat(s, &fullname, &stbuf); | |
2989 | if (err < 0) { | |
2990 | goto out; | |
2991 | } | |
2992 | stat_to_qid(&stbuf, &qid); | |
2993 | err = offset; | |
2994 | err += pdu_marshal(pdu, offset, "Q", &qid); | |
5268cecc | 2995 | out: |
1b733fed AK |
2996 | complete_pdu(s, pdu, err); |
2997 | v9fs_string_free(&fullname); | |
2998 | v9fs_string_free(&name); | |
5268cecc MK |
2999 | } |
3000 | ||
82cc3ee8 MK |
3001 | /* |
3002 | * Implement posix byte range locking code | |
3003 | * Server side handling of locking code is very simple, because 9p server in | |
3004 | * QEMU can handle only one client. And most of the lock handling | |
3005 | * (like conflict, merging) etc is done by the VFS layer itself, so no need to | |
3006 | * do any thing in * qemu 9p server side lock code path. | |
3007 | * So when a TLOCK request comes, always return success | |
3008 | */ | |
ff06030f | 3009 | static void v9fs_lock(void *opaque) |
82cc3ee8 | 3010 | { |
0c27bf2a AK |
3011 | int8_t status; |
3012 | V9fsFlock *flock; | |
3013 | size_t offset = 7; | |
3014 | struct stat stbuf; | |
3015 | V9fsFidState *fidp; | |
3016 | int32_t fid, err = 0; | |
ff06030f VJ |
3017 | V9fsPDU *pdu = opaque; |
3018 | V9fsState *s = pdu->s; | |
82cc3ee8 | 3019 | |
0c27bf2a AK |
3020 | flock = g_malloc(sizeof(*flock)); |
3021 | pdu_unmarshal(pdu, offset, "dbdqqds", &fid, &flock->type, | |
3022 | &flock->flags, &flock->start, &flock->length, | |
3023 | &flock->proc_id, &flock->client_id); | |
3024 | status = P9_LOCK_ERROR; | |
82cc3ee8 MK |
3025 | |
3026 | /* We support only block flag now (that too ignored currently) */ | |
0c27bf2a | 3027 | if (flock->flags & ~P9_LOCK_FLAGS_BLOCK) { |
82cc3ee8 MK |
3028 | err = -EINVAL; |
3029 | goto out; | |
3030 | } | |
0c27bf2a AK |
3031 | fidp = lookup_fid(s, fid); |
3032 | if (fidp == NULL) { | |
82cc3ee8 MK |
3033 | err = -ENOENT; |
3034 | goto out; | |
3035 | } | |
0c27bf2a | 3036 | err = v9fs_co_fstat(s, fidp->fs.fd, &stbuf); |
82cc3ee8 | 3037 | if (err < 0) { |
82cc3ee8 MK |
3038 | goto out; |
3039 | } | |
0c27bf2a | 3040 | status = P9_LOCK_SUCCESS; |
82cc3ee8 | 3041 | out: |
0c27bf2a AK |
3042 | err = offset; |
3043 | err += pdu_marshal(pdu, offset, "b", status); | |
3044 | complete_pdu(s, pdu, err); | |
3045 | g_free(flock); | |
82cc3ee8 MK |
3046 | } |
3047 | ||
8f354003 MK |
3048 | /* |
3049 | * When a TGETLOCK request comes, always return success because all lock | |
3050 | * handling is done by client's VFS layer. | |
3051 | */ | |
3052 | ||
ff06030f | 3053 | static void v9fs_getlock(void *opaque) |
8f354003 | 3054 | { |
ff06030f VJ |
3055 | V9fsPDU *pdu = opaque; |
3056 | V9fsState *s = pdu->s; | |
8f354003 MK |
3057 | int32_t fid, err = 0; |
3058 | V9fsGetlockState *vs; | |
3059 | ||
7267c094 | 3060 | vs = g_malloc0(sizeof(*vs)); |
8f354003 MK |
3061 | vs->pdu = pdu; |
3062 | vs->offset = 7; | |
3063 | ||
7267c094 | 3064 | vs->glock = g_malloc(sizeof(*vs->glock)); |
8f354003 MK |
3065 | pdu_unmarshal(vs->pdu, vs->offset, "dbqqds", &fid, &vs->glock->type, |
3066 | &vs->glock->start, &vs->glock->length, &vs->glock->proc_id, | |
3067 | &vs->glock->client_id); | |
3068 | ||
3069 | vs->fidp = lookup_fid(s, fid); | |
3070 | if (vs->fidp == NULL) { | |
3071 | err = -ENOENT; | |
3072 | goto out; | |
3073 | } | |
3074 | ||
3075 | err = v9fs_do_fstat(s, vs->fidp->fs.fd, &vs->stbuf); | |
3076 | if (err < 0) { | |
3077 | err = -errno; | |
3078 | goto out; | |
3079 | } | |
3080 | vs->glock->type = F_UNLCK; | |
3081 | vs->offset += pdu_marshal(vs->pdu, vs->offset, "bqqds", vs->glock->type, | |
3082 | vs->glock->start, vs->glock->length, vs->glock->proc_id, | |
3083 | &vs->glock->client_id); | |
3084 | out: | |
3085 | complete_pdu(s, vs->pdu, err); | |
7267c094 AL |
3086 | g_free(vs->glock); |
3087 | g_free(vs); | |
8f354003 MK |
3088 | } |
3089 | ||
ff06030f | 3090 | static void v9fs_mkdir(void *opaque) |
b67592ea | 3091 | { |
ff06030f | 3092 | V9fsPDU *pdu = opaque; |
e84861f7 | 3093 | size_t offset = 7; |
b67592ea | 3094 | int32_t fid; |
e84861f7 VJ |
3095 | struct stat stbuf; |
3096 | V9fsString name, fullname; | |
3097 | V9fsQID qid; | |
b67592ea MK |
3098 | V9fsFidState *fidp; |
3099 | gid_t gid; | |
3100 | int mode; | |
e84861f7 | 3101 | int err = 0; |
b67592ea | 3102 | |
e84861f7 VJ |
3103 | v9fs_string_init(&fullname); |
3104 | pdu_unmarshal(pdu, offset, "dsdd", &fid, &name, &mode, &gid); | |
b67592ea | 3105 | |
e84861f7 | 3106 | fidp = lookup_fid(pdu->s, fid); |
b67592ea MK |
3107 | if (fidp == NULL) { |
3108 | err = -ENOENT; | |
3109 | goto out; | |
3110 | } | |
e84861f7 VJ |
3111 | v9fs_string_sprintf(&fullname, "%s/%s", fidp->path.data, name.data); |
3112 | err = v9fs_co_mkdir(pdu->s, fullname.data, mode, fidp->uid, gid); | |
3113 | if (err < 0) { | |
3114 | goto out; | |
3115 | } | |
3116 | err = v9fs_co_lstat(pdu->s, &fullname, &stbuf); | |
3117 | if (err < 0) { | |
3118 | goto out; | |
3119 | } | |
3120 | stat_to_qid(&stbuf, &qid); | |
3121 | offset += pdu_marshal(pdu, offset, "Q", &qid); | |
3122 | err = offset; | |
b67592ea | 3123 | out: |
e84861f7 VJ |
3124 | complete_pdu(pdu->s, pdu, err); |
3125 | v9fs_string_free(&fullname); | |
3126 | v9fs_string_free(&name); | |
b67592ea MK |
3127 | } |
3128 | ||
ff06030f | 3129 | static void v9fs_xattrwalk(void *opaque) |
fa32ef88 | 3130 | { |
670185a6 AK |
3131 | int64_t size; |
3132 | V9fsString name; | |
fa32ef88 | 3133 | ssize_t err = 0; |
670185a6 | 3134 | size_t offset = 7; |
fa32ef88 | 3135 | int32_t fid, newfid; |
670185a6 AK |
3136 | V9fsFidState *file_fidp; |
3137 | V9fsFidState *xattr_fidp; | |
3138 | V9fsPDU *pdu = opaque; | |
3139 | V9fsState *s = pdu->s; | |
fa32ef88 | 3140 | |
670185a6 AK |
3141 | pdu_unmarshal(pdu, offset, "dds", &fid, &newfid, &name); |
3142 | file_fidp = lookup_fid(s, fid); | |
3143 | if (file_fidp == NULL) { | |
fa32ef88 AK |
3144 | err = -ENOENT; |
3145 | goto out; | |
3146 | } | |
670185a6 AK |
3147 | xattr_fidp = alloc_fid(s, newfid); |
3148 | if (xattr_fidp == NULL) { | |
fa32ef88 AK |
3149 | err = -EINVAL; |
3150 | goto out; | |
3151 | } | |
670185a6 AK |
3152 | v9fs_string_copy(&xattr_fidp->path, &file_fidp->path); |
3153 | if (name.data[0] == 0) { | |
fa32ef88 AK |
3154 | /* |
3155 | * listxattr request. Get the size first | |
3156 | */ | |
670185a6 AK |
3157 | size = v9fs_co_llistxattr(s, &xattr_fidp->path, NULL, 0); |
3158 | if (size < 0) { | |
3159 | err = size; | |
3160 | free_fid(s, xattr_fidp->fid); | |
3161 | goto out; | |
fa32ef88 | 3162 | } |
670185a6 AK |
3163 | /* |
3164 | * Read the xattr value | |
3165 | */ | |
3166 | xattr_fidp->fs.xattr.len = size; | |
3167 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3168 | xattr_fidp->fs.xattr.copied_len = -1; | |
3169 | if (size) { | |
7267c094 | 3170 | xattr_fidp->fs.xattr.value = g_malloc(size); |
670185a6 AK |
3171 | err = v9fs_co_llistxattr(s, &xattr_fidp->path, |
3172 | xattr_fidp->fs.xattr.value, | |
3173 | xattr_fidp->fs.xattr.len); | |
3174 | if (err < 0) { | |
3175 | free_fid(s, xattr_fidp->fid); | |
3176 | goto out; | |
3177 | } | |
3178 | } | |
3179 | offset += pdu_marshal(pdu, offset, "q", size); | |
3180 | err = offset; | |
fa32ef88 AK |
3181 | } else { |
3182 | /* | |
3183 | * specific xattr fid. We check for xattr | |
3184 | * presence also collect the xattr size | |
3185 | */ | |
670185a6 AK |
3186 | size = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
3187 | &name, NULL, 0); | |
3188 | if (size < 0) { | |
3189 | err = size; | |
3190 | free_fid(s, xattr_fidp->fid); | |
3191 | goto out; | |
fa32ef88 | 3192 | } |
670185a6 AK |
3193 | /* |
3194 | * Read the xattr value | |
3195 | */ | |
3196 | xattr_fidp->fs.xattr.len = size; | |
3197 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3198 | xattr_fidp->fs.xattr.copied_len = -1; | |
3199 | if (size) { | |
7267c094 | 3200 | xattr_fidp->fs.xattr.value = g_malloc(size); |
670185a6 AK |
3201 | err = v9fs_co_lgetxattr(s, &xattr_fidp->path, |
3202 | &name, xattr_fidp->fs.xattr.value, | |
3203 | xattr_fidp->fs.xattr.len); | |
3204 | if (err < 0) { | |
3205 | free_fid(s, xattr_fidp->fid); | |
3206 | goto out; | |
3207 | } | |
3208 | } | |
3209 | offset += pdu_marshal(pdu, offset, "q", size); | |
3210 | err = offset; | |
fa32ef88 AK |
3211 | } |
3212 | out: | |
670185a6 AK |
3213 | complete_pdu(s, pdu, err); |
3214 | v9fs_string_free(&name); | |
fa32ef88 AK |
3215 | } |
3216 | ||
ff06030f | 3217 | static void v9fs_xattrcreate(void *opaque) |
10b468bd AK |
3218 | { |
3219 | int flags; | |
3220 | int32_t fid; | |
f10ff58d | 3221 | int64_t size; |
10b468bd | 3222 | ssize_t err = 0; |
f10ff58d AK |
3223 | V9fsString name; |
3224 | size_t offset = 7; | |
3225 | V9fsFidState *file_fidp; | |
3226 | V9fsFidState *xattr_fidp; | |
3227 | V9fsPDU *pdu = opaque; | |
3228 | V9fsState *s = pdu->s; | |
10b468bd | 3229 | |
f10ff58d AK |
3230 | pdu_unmarshal(pdu, offset, "dsqd", |
3231 | &fid, &name, &size, &flags); | |
10b468bd | 3232 | |
f10ff58d AK |
3233 | file_fidp = lookup_fid(s, fid); |
3234 | if (file_fidp == NULL) { | |
10b468bd AK |
3235 | err = -EINVAL; |
3236 | goto out; | |
3237 | } | |
10b468bd | 3238 | /* Make the file fid point to xattr */ |
f10ff58d AK |
3239 | xattr_fidp = file_fidp; |
3240 | xattr_fidp->fid_type = P9_FID_XATTR; | |
3241 | xattr_fidp->fs.xattr.copied_len = 0; | |
3242 | xattr_fidp->fs.xattr.len = size; | |
3243 | xattr_fidp->fs.xattr.flags = flags; | |
3244 | v9fs_string_init(&xattr_fidp->fs.xattr.name); | |
3245 | v9fs_string_copy(&xattr_fidp->fs.xattr.name, &name); | |
3246 | if (size) { | |
7267c094 | 3247 | xattr_fidp->fs.xattr.value = g_malloc(size); |
f10ff58d AK |
3248 | } else { |
3249 | xattr_fidp->fs.xattr.value = NULL; | |
3250 | } | |
3251 | err = offset; | |
10b468bd | 3252 | out: |
f10ff58d AK |
3253 | complete_pdu(s, pdu, err); |
3254 | v9fs_string_free(&name); | |
10b468bd | 3255 | } |
fa32ef88 | 3256 | |
ff06030f | 3257 | static void v9fs_readlink(void *opaque) |
df0973a4 | 3258 | { |
ff06030f | 3259 | V9fsPDU *pdu = opaque; |
7a5ca31e VJ |
3260 | size_t offset = 7; |
3261 | V9fsString target; | |
df0973a4 | 3262 | int32_t fid; |
df0973a4 MK |
3263 | int err = 0; |
3264 | V9fsFidState *fidp; | |
3265 | ||
7a5ca31e VJ |
3266 | pdu_unmarshal(pdu, offset, "d", &fid); |
3267 | fidp = lookup_fid(pdu->s, fid); | |
df0973a4 MK |
3268 | if (fidp == NULL) { |
3269 | err = -ENOENT; | |
3270 | goto out; | |
3271 | } | |
3272 | ||
7a5ca31e VJ |
3273 | v9fs_string_init(&target); |
3274 | err = v9fs_co_readlink(pdu->s, &fidp->path, &target); | |
3275 | if (err < 0) { | |
3276 | goto out; | |
3277 | } | |
3278 | offset += pdu_marshal(pdu, offset, "s", &target); | |
3279 | err = offset; | |
3280 | v9fs_string_free(&target); | |
df0973a4 | 3281 | out: |
7a5ca31e | 3282 | complete_pdu(pdu->s, pdu, err); |
df0973a4 MK |
3283 | } |
3284 | ||
ff06030f | 3285 | static CoroutineEntry *pdu_co_handlers[] = { |
c18e2f94 | 3286 | [P9_TREADDIR] = v9fs_readdir, |
be940c87 | 3287 | [P9_TSTATFS] = v9fs_statfs, |
00ede4c2 | 3288 | [P9_TGETATTR] = v9fs_getattr, |
c79ce737 | 3289 | [P9_TSETATTR] = v9fs_setattr, |
fa32ef88 | 3290 | [P9_TXATTRWALK] = v9fs_xattrwalk, |
10b468bd | 3291 | [P9_TXATTRCREATE] = v9fs_xattrcreate, |
5268cecc | 3292 | [P9_TMKNOD] = v9fs_mknod, |
c7b4b0b3 | 3293 | [P9_TRENAME] = v9fs_rename, |
82cc3ee8 | 3294 | [P9_TLOCK] = v9fs_lock, |
8f354003 | 3295 | [P9_TGETLOCK] = v9fs_getlock, |
df0973a4 | 3296 | [P9_TREADLINK] = v9fs_readlink, |
b67592ea | 3297 | [P9_TMKDIR] = v9fs_mkdir, |
9f107513 | 3298 | [P9_TVERSION] = v9fs_version, |
771e9d4c | 3299 | [P9_TLOPEN] = v9fs_open, |
9f107513 AL |
3300 | [P9_TATTACH] = v9fs_attach, |
3301 | [P9_TSTAT] = v9fs_stat, | |
3302 | [P9_TWALK] = v9fs_walk, | |
3303 | [P9_TCLUNK] = v9fs_clunk, | |
b41e95d3 | 3304 | [P9_TFSYNC] = v9fs_fsync, |
9f107513 AL |
3305 | [P9_TOPEN] = v9fs_open, |
3306 | [P9_TREAD] = v9fs_read, | |
3307 | #if 0 | |
3308 | [P9_TAUTH] = v9fs_auth, | |
3309 | #endif | |
3310 | [P9_TFLUSH] = v9fs_flush, | |
b2c224be | 3311 | [P9_TLINK] = v9fs_link, |
08c60fc9 | 3312 | [P9_TSYMLINK] = v9fs_symlink, |
9f107513 | 3313 | [P9_TCREATE] = v9fs_create, |
c1568af5 | 3314 | [P9_TLCREATE] = v9fs_lcreate, |
9f107513 AL |
3315 | [P9_TWRITE] = v9fs_write, |
3316 | [P9_TWSTAT] = v9fs_wstat, | |
3317 | [P9_TREMOVE] = v9fs_remove, | |
3318 | }; | |
3319 | ||
ff06030f | 3320 | static void v9fs_op_not_supp(void *opaque) |
5c3234c6 | 3321 | { |
ff06030f VJ |
3322 | V9fsPDU *pdu = opaque; |
3323 | complete_pdu(pdu->s, pdu, -EOPNOTSUPP); | |
5c3234c6 AK |
3324 | } |
3325 | ||
9f107513 AL |
3326 | static void submit_pdu(V9fsState *s, V9fsPDU *pdu) |
3327 | { | |
ff06030f VJ |
3328 | Coroutine *co; |
3329 | CoroutineEntry *handler; | |
9f107513 AL |
3330 | |
3331 | if (debug_9p_pdu) { | |
3332 | pprint_pdu(pdu); | |
3333 | } | |
ff06030f VJ |
3334 | if (pdu->id >= ARRAY_SIZE(pdu_co_handlers) || |
3335 | (pdu_co_handlers[pdu->id] == NULL)) { | |
5c3234c6 AK |
3336 | handler = v9fs_op_not_supp; |
3337 | } else { | |
ff06030f | 3338 | handler = pdu_co_handlers[pdu->id]; |
5c3234c6 | 3339 | } |
ff06030f VJ |
3340 | co = qemu_coroutine_create(handler); |
3341 | qemu_coroutine_enter(co, pdu); | |
9f107513 AL |
3342 | } |
3343 | ||
f4f61d27 | 3344 | void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq) |
9f107513 AL |
3345 | { |
3346 | V9fsState *s = (V9fsState *)vdev; | |
3347 | V9fsPDU *pdu; | |
3348 | ssize_t len; | |
3349 | ||
3350 | while ((pdu = alloc_pdu(s)) && | |
3351 | (len = virtqueue_pop(vq, &pdu->elem)) != 0) { | |
3352 | uint8_t *ptr; | |
ff06030f | 3353 | pdu->s = s; |
9f107513 AL |
3354 | BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0); |
3355 | BUG_ON(pdu->elem.out_sg[0].iov_len < 7); | |
3356 | ||
3357 | ptr = pdu->elem.out_sg[0].iov_base; | |
3358 | ||
3359 | memcpy(&pdu->size, ptr, 4); | |
3360 | pdu->id = ptr[4]; | |
3361 | memcpy(&pdu->tag, ptr + 5, 2); | |
9f107513 AL |
3362 | submit_pdu(s, pdu); |
3363 | } | |
9f107513 AL |
3364 | free_pdu(s, pdu); |
3365 | } |